Merge tag 'for-5.15/drivers-2021-08-30' of git://git.kernel.dk/linux-block

Pull block driver updates from Jens Axboe:
 "Sitting on top of the core block changes, here are the driver changes
  for the 5.15 merge window:

   - NVMe updates via Christoph:
       - suspend improvements for devices with an HMB (Keith Busch)
       - handle double completions more gacefull (Sagi Grimberg)
       - cleanup the selects for the nvme core code a bit (Sagi Grimberg)
       - don't update queue count when failing to set io queues (Ruozhu Li)
       - various nvmet connect fixes (Amit Engel)
       - cleanup lightnvm leftovers (Keith Busch, me)
       - small cleanups (Colin Ian King, Hou Pu)
       - add tracing for the Set Features command (Hou Pu)
       - CMB sysfs cleanups (Keith Busch)
       - add a mutex_destroy call (Keith Busch)

   - remove lightnvm subsystem. It's served its purpose and ultimately
     led to zoned nvme support, we no longer need it (Christoph)

   - revert floppy O_NDELAY fix (Denis)

   - nbd fixes (Hou, Pavel, Baokun)

   - nbd locking fixes (Tetsuo)

   - nbd device removal fixes (Christoph)

   - raid10 rcu warning fix (Xiao)

   - raid1 write behind fix (Guoqing)

   - rnbd fixes (Gioh, Md Haris)

   - misc fixes (Colin)"

* tag 'for-5.15/drivers-2021-08-30' of git://git.kernel.dk/linux-block: (42 commits)
  Revert "floppy: reintroduce O_NDELAY fix"
  raid1: ensure write behind bio has less than BIO_MAX_VECS sectors
  md/raid10: Remove unnecessary rcu_dereference in raid10_handle_discard
  nbd: remove nbd->destroy_complete
  nbd: only return usable devices from nbd_find_unused
  nbd: set nbd->index before releasing nbd_index_mutex
  nbd: prevent IDR lookups from finding partially initialized devices
  nbd: reset NBD to NULL when restarting in nbd_genl_connect
  nbd: add missing locking to the nbd_dev_add error path
  nvme: remove the unused NVME_NS_* enum
  nvme: remove nvm_ndev from ns
  nvme: Have NVME_FABRICS select NVME_CORE instead of transport drivers
  block: nbd: add sanity check for first_minor
  nvmet: check that host sqsize does not exceed ctrl MQES
  nvmet: avoid duplicate qid in connect cmd
  nvmet: pass back cntlid on successful completion
  nvme-rdma: don't update queue count when failing to set io queues
  nvme-tcp: don't update queue count when failing to set io queues
  nvme-tcp: pair send_mutex init with destroy
  nvme: allow user toggling hmb usage
  ...

43 files changed, 442 insertions, 12955 deletions

diff --git a/drivers/Kconfig b/drivers/Kconfig
index 8bad63417a50..30d2db37cc87 100644
--- a/drivers/Kconfig
+++ b/drivers/Kconfig
@@ -51,8 +51,6 @@ source "drivers/net/Kconfig"
 
 source "drivers/isdn/Kconfig"
 
-source "drivers/lightnvm/Kconfig"
-
 # input before char - char/joystick depends on it. As does USB.
 
 source "drivers/input/Kconfig"
diff --git a/drivers/Makefile b/drivers/Makefile
index 27c018bdf4de..be5d40ae1488 100644
--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -70,7 +70,6 @@ obj-$(CONFIG_FB_I810)           += video/fbdev/i810/
 obj-$(CONFIG_FB_INTEL)          += video/fbdev/intelfb/
 
 obj-$(CONFIG_PARPORT)		+= parport/
-obj-$(CONFIG_NVM)		+= lightnvm/
 obj-y				+= base/ block/ misc/ mfd/ nfc/
 obj-$(CONFIG_LIBNVDIMM)		+= nvdimm/
 obj-$(CONFIG_DAX)		+= dax/
diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index 87460e0e5c72..fef79ea52e3e 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -4029,23 +4029,23 @@ static int floppy_open(struct block_device *bdev, fmode_t mode)
 	if (fdc_state[FDC(drive)].rawcmd == 1)
 		fdc_state[FDC(drive)].rawcmd = 2;
 
-	if (mode & (FMODE_READ|FMODE_WRITE)) {
-		drive_state[drive].last_checked = 0;
-		clear_bit(FD_OPEN_SHOULD_FAIL_BIT, &drive_state[drive].flags);
-		if (bdev_check_media_change(bdev))
-			floppy_revalidate(bdev->bd_disk);
-		if (test_bit(FD_DISK_CHANGED_BIT, &drive_state[drive].flags))
-			goto out;
-		if (test_bit(FD_OPEN_SHOULD_FAIL_BIT, &drive_state[drive].flags))
+	if (!(mode & FMODE_NDELAY)) {
+		if (mode & (FMODE_READ|FMODE_WRITE)) {
+			drive_state[drive].last_checked = 0;
+			clear_bit(FD_OPEN_SHOULD_FAIL_BIT,
+				  &drive_state[drive].flags);
+			if (bdev_check_media_change(bdev))
+				floppy_revalidate(bdev->bd_disk);
+			if (test_bit(FD_DISK_CHANGED_BIT, &drive_state[drive].flags))
+				goto out;
+			if (test_bit(FD_OPEN_SHOULD_FAIL_BIT, &drive_state[drive].flags))
+				goto out;
+		}
+		res = -EROFS;
+		if ((mode & FMODE_WRITE) &&
+		    !test_bit(FD_DISK_WRITABLE_BIT, &drive_state[drive].flags))
 			goto out;
 	}
-
-	res = -EROFS;
-
-	if ((mode & FMODE_WRITE) &&
-			!test_bit(FD_DISK_WRITABLE_BIT, &drive_state[drive].flags))
-		goto out;
-
 	mutex_unlock(&open_lock);
 	mutex_unlock(&floppy_mutex);
 	return 0;
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index 19f5d5a8b16a..5170a630778d 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -49,6 +49,7 @@
 
 static DEFINE_IDR(nbd_index_idr);
 static DEFINE_MUTEX(nbd_index_mutex);
+static struct workqueue_struct *nbd_del_wq;
 static int nbd_total_devices = 0;
 
 struct nbd_sock {
@@ -113,12 +114,12 @@ struct nbd_device {
 	struct mutex config_lock;
 	struct gendisk *disk;
 	struct workqueue_struct *recv_workq;
+	struct work_struct remove_work;
 
 	struct list_head list;
 	struct task_struct *task_recv;
 	struct task_struct *task_setup;
 
-	struct completion *destroy_complete;
 	unsigned long flags;
 
 	char *backend;
@@ -237,32 +238,36 @@ static void nbd_dev_remove(struct nbd_device *nbd)
 {
 	struct gendisk *disk = nbd->disk;
 
-	if (disk) {
-		del_gendisk(disk);
-		blk_cleanup_disk(disk);
-		blk_mq_free_tag_set(&nbd->tag_set);
-	}
+	del_gendisk(disk);
+	blk_cleanup_disk(disk);
+	blk_mq_free_tag_set(&nbd->tag_set);
 
 	/*
-	 * Place this in the last just before the nbd is freed to
-	 * make sure that the disk and the related kobject are also
-	 * totally removed to avoid duplicate creation of the same
-	 * one.
+	 * Remove from idr after del_gendisk() completes, so if the same ID is
+	 * reused, the following add_disk() will succeed.
 	 */
-	if (test_bit(NBD_DESTROY_ON_DISCONNECT, &nbd->flags) && nbd->destroy_complete)
-		complete(nbd->destroy_complete);
+	mutex_lock(&nbd_index_mutex);
+	idr_remove(&nbd_index_idr, nbd->index);
+	mutex_unlock(&nbd_index_mutex);
 
 	kfree(nbd);
 }
 
+static void nbd_dev_remove_work(struct work_struct *work)
+{
+	nbd_dev_remove(container_of(work, struct nbd_device, remove_work));
+}
+
 static void nbd_put(struct nbd_device *nbd)
 {
-	if (refcount_dec_and_mutex_lock(&nbd->refs,
-					&nbd_index_mutex)) {
-		idr_remove(&nbd_index_idr, nbd->index);
+	if (!refcount_dec_and_test(&nbd->refs))
+		return;
+
+	/* Call del_gendisk() asynchrounously to prevent deadlock */
+	if (test_bit(NBD_DESTROY_ON_DISCONNECT, &nbd->flags))
+		queue_work(nbd_del_wq, &nbd->remove_work);
+	else
 		nbd_dev_remove(nbd);
-		mutex_unlock(&nbd_index_mutex);
-	}
 }
 
 static int nbd_disconnected(struct nbd_config *config)
@@ -1388,6 +1393,7 @@ static int __nbd_ioctl(struct block_device *bdev, struct nbd_device *nbd,
 		       unsigned int cmd, unsigned long arg)
 {
 	struct nbd_config *config = nbd->config;
+	loff_t bytesize;
 
 	switch (cmd) {
 	case NBD_DISCONNECT:
@@ -1402,8 +1408,9 @@ static int __nbd_ioctl(struct block_device *bdev, struct nbd_device *nbd,
 	case NBD_SET_SIZE:
 		return nbd_set_size(nbd, arg, config->blksize);
 	case NBD_SET_SIZE_BLOCKS:
-		return nbd_set_size(nbd, arg * config->blksize,
-				    config->blksize);
+		if (check_mul_overflow((loff_t)arg, config->blksize, &bytesize))
+			return -EINVAL;
+		return nbd_set_size(nbd, bytesize, config->blksize);
 	case NBD_SET_TIMEOUT:
 		nbd_set_cmd_timeout(nbd, arg);
 		return 0;
@@ -1665,7 +1672,7 @@ static const struct blk_mq_ops nbd_mq_ops = {
 	.timeout	= nbd_xmit_timeout,
 };
 
-static int nbd_dev_add(int index)
+static struct nbd_device *nbd_dev_add(int index, unsigned int refs)
 {
 	struct nbd_device *nbd;
 	struct gendisk *disk;
@@ -1683,13 +1690,14 @@ static int nbd_dev_add(int index)
 	nbd->tag_set.flags = BLK_MQ_F_SHOULD_MERGE |
 		BLK_MQ_F_BLOCKING;
 	nbd->tag_set.driver_data = nbd;
-	nbd->destroy_complete = NULL;
+	INIT_WORK(&nbd->remove_work, nbd_dev_remove_work);
 	nbd->backend = NULL;
 
 	err = blk_mq_alloc_tag_set(&nbd->tag_set);
 	if (err)
 		goto out_free_nbd;
 
+	mutex_lock(&nbd_index_mutex);
 	if (index >= 0) {
 		err = idr_alloc(&nbd_index_idr, nbd, index, index + 1,
 				GFP_KERNEL);
@@ -1700,9 +1708,10 @@ static int nbd_dev_add(int index)
 		if (err >= 0)
 			index = err;
 	}
+	nbd->index = index;
+	mutex_unlock(&nbd_index_mutex);
 	if (err < 0)
 		goto out_free_tags;
-	nbd->index = index;
 
 	disk = blk_mq_alloc_disk(&nbd->tag_set, NULL);
 	if (IS_ERR(disk)) {
@@ -1726,38 +1735,65 @@ static int nbd_dev_add(int index)
 
 	mutex_init(&nbd->config_lock);
 	refcount_set(&nbd->config_refs, 0);
-	refcount_set(&nbd->refs, 1);
+	/*
+	 * Start out with a zero references to keep other threads from using
+	 * this device until it is fully initialized.
+	 */
+	refcount_set(&nbd->refs, 0);
 	INIT_LIST_HEAD(&nbd->list);
 	disk->major = NBD_MAJOR;
+
+	/* Too big first_minor can cause duplicate creation of
+	 * sysfs files/links, since first_minor will be truncated to
+	 * byte in __device_add_disk().
+	 */
 	disk->first_minor = index << part_shift;
+	if (disk->first_minor > 0xff) {
+		err = -EINVAL;
+		goto out_free_idr;
+	}
+
 	disk->minors = 1 << part_shift;
 	disk->fops = &nbd_fops;
 	disk->private_data = nbd;
 	sprintf(disk->disk_name, "nbd%d", index);
 	add_disk(disk);
+
+	/*
+	 * Now publish the device.
+	 */
+	refcount_set(&nbd->refs, refs);
 	nbd_total_devices++;
-	return index;
+	return nbd;
 
 out_free_idr:
+	mutex_lock(&nbd_index_mutex);
 	idr_remove(&nbd_index_idr, index);
+	mutex_unlock(&nbd_index_mutex);
 out_free_tags:
 	blk_mq_free_tag_set(&nbd->tag_set);
 out_free_nbd:
 	kfree(nbd);
 out:
-	return err;
+	return ERR_PTR(err);
 }
 
-static int find_free_cb(int id, void *ptr, void *data)
+static struct nbd_device *nbd_find_get_unused(void)
 {
-	struct nbd_device *nbd = ptr;
-	struct nbd_device **found = data;
+	struct nbd_device *nbd;
+	int id;
 
-	if (!refcount_read(&nbd->config_refs)) {
-		*found = nbd;
-		return 1;
+	lockdep_assert_held(&nbd_index_mutex);
+
+	idr_for_each_entry(&nbd_index_idr, nbd, id) {
+		if (refcount_read(&nbd->config_refs) ||
+		    test_bit(NBD_DESTROY_ON_DISCONNECT, &nbd->flags))
+			continue;
+		if (refcount_inc_not_zero(&nbd->refs))
+			return nbd;
 	}
-	return 0;
+
+	return NULL;
 }
 
 /* Netlink interface. */
@@ -1806,8 +1842,7 @@ static int nbd_genl_size_set(struct genl_info *info, struct nbd_device *nbd)
 
 static int nbd_genl_connect(struct sk_buff *skb, struct genl_info *info)
 {
-	DECLARE_COMPLETION_ONSTACK(destroy_complete);
-	struct nbd_device *nbd = NULL;
+	struct nbd_device *nbd;
 	struct nbd_config *config;
 	int index = -1;
 	int ret;
@@ -1829,55 +1864,29 @@ static int nbd_genl_connect(struct sk_buff *skb, struct genl_info *info)
 again:
 	mutex_lock(&nbd_index_mutex);
 	if (index == -1) {
-		ret = idr_for_each(&nbd_index_idr, &find_free_cb, &nbd);
-		if (ret == 0) {
-			int new_index;
-			new_index = nbd_dev_add(-1);
-			if (new_index < 0) {
-				mutex_unlock(&nbd_index_mutex);
-				printk(KERN_ERR "nbd: failed to add new device\n");
-				return new_index;
-			}
-			nbd = idr_find(&nbd_index_idr, new_index);
-		}
+		nbd = nbd_find_get_unused();
 	} else {
 		nbd = idr_find(&nbd_index_idr, index);
-		if (!nbd) {
-			ret = nbd_dev_add(index);
-			if (ret < 0) {
+		if (nbd) {
+			if ((test_bit(NBD_DESTROY_ON_DISCONNECT, &nbd->flags) &&
+			     test_bit(NBD_DISCONNECT_REQUESTED, &nbd->flags)) ||
+			    !refcount_inc_not_zero(&nbd->refs)) {
 				mutex_unlock(&nbd_index_mutex);
-				printk(KERN_ERR "nbd: failed to add new device\n");
-				return ret;
+				pr_err("nbd: device at index %d is going down\n",
+					index);
+				return -EINVAL;
 			}
-			nbd = idr_find(&nbd_index_idr, index);
 		}
 	}
-	if (!nbd) {
-		printk(KERN_ERR "nbd: couldn't find device at index %d\n",
-		       index);
-		mutex_unlock(&nbd_index_mutex);
-		return -EINVAL;
-	}
-
-	if (test_bit(NBD_DESTROY_ON_DISCONNECT, &nbd->flags) &&
-	    test_bit(NBD_DISCONNECT_REQUESTED, &nbd->flags)) {
-		nbd->destroy_complete = &destroy_complete;
-		mutex_unlock(&nbd_index_mutex);
-
-		/* Wait untill the the nbd stuff is totally destroyed */
-		wait_for_completion(&destroy_complete);
-		goto again;
-	}
+	mutex_unlock(&nbd_index_mutex);
 
-	if (!refcount_inc_not_zero(&nbd->refs)) {
-		mutex_unlock(&nbd_index_mutex);
-		if (index == -1)
-			goto again;
-		printk(KERN_ERR "nbd: device at index %d is going down\n",
-		       index);
-		return -EINVAL;
+	if (!nbd) {
+		nbd = nbd_dev_add(index, 2);
+		if (IS_ERR(nbd)) {
+			pr_err("nbd: failed to add new device\n");
+			return PTR_ERR(nbd);
+		}
 	}
-	mutex_unlock(&nbd_index_mutex);
 
 	mutex_lock(&nbd->config_lock);
 	if (refcount_read(&nbd->config_refs)) {
@@ -2424,16 +2433,21 @@ static int __init nbd_init(void)
 	if (register_blkdev(NBD_MAJOR, "nbd"))
 		return -EIO;
 
+	nbd_del_wq = alloc_workqueue("nbd-del", WQ_UNBOUND, 0);
+	if (!nbd_del_wq) {
+		unregister_blkdev(NBD_MAJOR, "nbd");
+		return -ENOMEM;
+	}
+
 	if (genl_register_family(&nbd_genl_family)) {
+		destroy_workqueue(nbd_del_wq);
 		unregister_blkdev(NBD_MAJOR, "nbd");
 		return -EINVAL;
 	}
 	nbd_dbg_init();
 
-	mutex_lock(&nbd_index_mutex);
 	for (i = 0; i < nbds_max; i++)
-		nbd_dev_add(i);
-	mutex_unlock(&nbd_index_mutex);
+		nbd_dev_add(i, 1);
 	return 0;
 }
 
@@ -2442,7 +2456,10 @@ static int nbd_exit_cb(int id, void *ptr, void *data)
 	struct list_head *list = (struct list_head *)data;
 	struct nbd_device *nbd = ptr;
 
-	list_add_tail(&nbd->list, list);
+	/* Skip nbd that is being removed asynchronously */
+	if (refcount_read(&nbd->refs))
+		list_add_tail(&nbd->list, list);
+
 	return 0;
 }
 
@@ -2465,6 +2482,9 @@ static void __exit nbd_cleanup(void)
 		nbd_put(nbd);
 	}
 
+	/* Also wait for nbd_dev_remove_work() completes */
+	destroy_workqueue(nbd_del_wq);
+
 	idr_destroy(&nbd_index_idr);
 	genl_unregister_family(&nbd_genl_family);
 	unregister_blkdev(NBD_MAJOR, "nbd");
diff --git a/drivers/block/rnbd/rnbd-clt-sysfs.c b/drivers/block/rnbd/rnbd-clt-sysfs.c
index 324afdd63a96..4b93fd83bf79 100644
--- a/drivers/block/rnbd/rnbd-clt-sysfs.c
+++ b/drivers/block/rnbd/rnbd-clt-sysfs.c
@@ -227,17 +227,17 @@ static ssize_t state_show(struct kobject *kobj,
 
 	switch (dev->dev_state) {
 	case DEV_STATE_INIT:
-		return snprintf(page, PAGE_SIZE, "init\n");
+		return sysfs_emit(page, "init\n");
 	case DEV_STATE_MAPPED:
 		/* TODO fix cli tool before changing to proper state */
-		return snprintf(page, PAGE_SIZE, "open\n");
+		return sysfs_emit(page, "open\n");
 	case DEV_STATE_MAPPED_DISCONNECTED:
 		/* TODO fix cli tool before changing to proper state */
-		return snprintf(page, PAGE_SIZE, "closed\n");
+		return sysfs_emit(page, "closed\n");
 	case DEV_STATE_UNMAPPED:
-		return snprintf(page, PAGE_SIZE, "unmapped\n");
+		return sysfs_emit(page, "unmapped\n");
 	default:
-		return snprintf(page, PAGE_SIZE, "unknown\n");
+		return sysfs_emit(page, "unknown\n");
 	}
 }
 
@@ -263,7 +263,7 @@ static ssize_t mapping_path_show(struct kobject *kobj,
 
 	dev = container_of(kobj, struct rnbd_clt_dev, kobj);
 
-	return scnprintf(page, PAGE_SIZE, "%s\n", dev->pathname);
+	return sysfs_emit(page, "%s\n", dev->pathname);
 }
 
 static struct kobj_attribute rnbd_clt_mapping_path_attr =
@@ -276,8 +276,7 @@ static ssize_t access_mode_show(struct kobject *kobj,
 
 	dev = container_of(kobj, struct rnbd_clt_dev, kobj);
 
-	return snprintf(page, PAGE_SIZE, "%s\n",
-			rnbd_access_mode_str(dev->access_mode));
+	return sysfs_emit(page, "%s\n", rnbd_access_mode_str(dev->access_mode));
 }
 
 static struct kobj_attribute rnbd_clt_access_mode =
@@ -286,8 +285,8 @@ static struct kobj_attribute rnbd_clt_access_mode =
 static ssize_t rnbd_clt_unmap_dev_show(struct kobject *kobj,
 					struct kobj_attribute *attr, char *page)
 {
-	return scnprintf(page, PAGE_SIZE, "Usage: echo <normal|force> > %s\n",
-			 attr->attr.name);
+	return sysfs_emit(page, "Usage: echo <normal|force> > %s\n",
+			  attr->attr.name);
 }
 
 static ssize_t rnbd_clt_unmap_dev_store(struct kobject *kobj,
@@ -357,9 +356,8 @@ static ssize_t rnbd_clt_resize_dev_show(struct kobject *kobj,
 					 struct kobj_attribute *attr,
 					 char *page)
 {
-	return scnprintf(page, PAGE_SIZE,
-			 "Usage: echo <new size in sectors> > %s\n",
-			 attr->attr.name);
+	return sysfs_emit(page, "Usage: echo <new size in sectors> > %s\n",
+			  attr->attr.name);
 }
 
 static ssize_t rnbd_clt_resize_dev_store(struct kobject *kobj,
@@ -390,8 +388,7 @@ static struct kobj_attribute rnbd_clt_resize_dev_attr =
 static ssize_t rnbd_clt_remap_dev_show(struct kobject *kobj,
 					struct kobj_attribute *attr, char *page)
 {
-	return scnprintf(page, PAGE_SIZE, "Usage: echo <1> > %s\n",
-			 attr->attr.name);
+	return sysfs_emit(page, "Usage: echo <1> > %s\n", attr->attr.name);
 }
 
 static ssize_t rnbd_clt_remap_dev_store(struct kobject *kobj,
@@ -436,7 +433,7 @@ static ssize_t session_show(struct kobject *kobj, struct kobj_attribute *attr,
 
 	dev = container_of(kobj, struct rnbd_clt_dev, kobj);
 
-	return scnprintf(page, PAGE_SIZE, "%s\n", dev->sess->sessname);
+	return sysfs_emit(page, "%s\n", dev->sess->sessname);
 }
 
 static struct kobj_attribute rnbd_clt_session_attr =
@@ -499,8 +496,8 @@ static ssize_t rnbd_clt_map_device_show(struct kobject *kobj,
 					 struct kobj_attribute *attr,
 					 char *page)
 {
-	return scnprintf(page, PAGE_SIZE,
-			 "Usage: echo \"[dest_port=server port number] sessname=<name of the rtrs session> path=<[srcaddr@]dstaddr> [path=<[srcaddr@]dstaddr>] device_path=<full path on remote side> [access_mode=<ro|rw|migration>] [nr_poll_queues=<number of queues>]\" > %s\n\naddr ::= [ ip:<ipv4> | ip:<ipv6> | gid:<gid> ]\n",
+	return sysfs_emit(page,
+			  "Usage: echo \"[dest_port=server port number] sessname=<name of the rtrs session> path=<[srcaddr@]dstaddr> [path=<[srcaddr@]dstaddr>] device_path=<full path on remote side> [access_mode=<ro|rw|migration>] [nr_poll_queues=<number of queues>]\" > %s\n\naddr ::= [ ip:<ipv4> | ip:<ipv6> | gid:<gid> ]\n",
 			 attr->attr.name);
 }
 
diff --git a/drivers/block/rnbd/rnbd-clt.c b/drivers/block/rnbd/rnbd-clt.c
index e9cc413495f0..bd4a41afbbfc 100644
--- a/drivers/block/rnbd/rnbd-clt.c
+++ b/drivers/block/rnbd/rnbd-clt.c
@@ -271,7 +271,7 @@ unlock:
 	 */
 	if (cpu_q)
 		*cpup = cpu_q->cpu;
-	put_cpu_var(sess->cpu_rr);
+	put_cpu_ptr(sess->cpu_rr);
 
 	if (q)
 		rnbd_clt_dev_requeue(q);
diff --git a/drivers/block/rnbd/rnbd-srv-sysfs.c b/drivers/block/rnbd/rnbd-srv-sysfs.c
index acf5fced11ef..4db98e0e76f0 100644
--- a/drivers/block/rnbd/rnbd-srv-sysfs.c
+++ b/drivers/block/rnbd/rnbd-srv-sysfs.c
@@ -90,8 +90,8 @@ static ssize_t read_only_show(struct kobject *kobj, struct kobj_attribute *attr,
 
 	sess_dev = container_of(kobj, struct rnbd_srv_sess_dev, kobj);
 
-	return scnprintf(page, PAGE_SIZE, "%d\n",
-			 !(sess_dev->open_flags & FMODE_WRITE));
+	return sysfs_emit(page, "%d\n",
+			  !(sess_dev->open_flags & FMODE_WRITE));
 }
 
 static struct kobj_attribute rnbd_srv_dev_session_ro_attr =
@@ -105,8 +105,8 @@ static ssize_t access_mode_show(struct kobject *kobj,
 
 	sess_dev = container_of(kobj, struct rnbd_srv_sess_dev, kobj);
 
-	return scnprintf(page, PAGE_SIZE, "%s\n",
-			 rnbd_access_mode_str(sess_dev->access_mode));
+	return sysfs_emit(page, "%s\n",
+			  rnbd_access_mode_str(sess_dev->access_mode));
 }
 
 static struct kobj_attribute rnbd_srv_dev_session_access_mode_attr =
@@ -119,7 +119,7 @@ static ssize_t mapping_path_show(struct kobject *kobj,
 
 	sess_dev = container_of(kobj, struct rnbd_srv_sess_dev, kobj);
 
-	return scnprintf(page, PAGE_SIZE, "%s\n", sess_dev->pathname);
+	return sysfs_emit(page, "%s\n", sess_dev->pathname);
 }
 
 static struct kobj_attribute rnbd_srv_dev_session_mapping_path_attr =
@@ -128,8 +128,8 @@ static struct kobj_attribute rnbd_srv_dev_session_mapping_path_attr =
 static ssize_t rnbd_srv_dev_session_force_close_show(struct kobject *kobj,
 					struct kobj_attribute *attr, char *page)
 {
-	return scnprintf(page, PAGE_SIZE, "Usage: echo 1 > %s\n",
-			 attr->attr.name);
+	return sysfs_emit(page, "Usage: echo 1 > %s\n",
+			  attr->attr.name);
 }
 
 static ssize_t rnbd_srv_dev_session_force_close_store(struct kobject *kobj,
diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index d83fee21f6c5..715bfa8aca7f 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -1092,7 +1092,6 @@ static int xlvbd_alloc_gendisk(blkif_sector_t capacity,
 	err = xlbd_reserve_minors(minor, nr_minors);
 	if (err)
 		return err;
-	err = -ENODEV;
 
 	memset(&info->tag_set, 0, sizeof(info->tag_set));
 	info->tag_set.ops = &blkfront_mq_ops;
diff --git a/drivers/lightnvm/Kconfig b/drivers/lightnvm/Kconfig
deleted file mode 100644
index 04caa0f2d445..000000000000
--- a/drivers/lightnvm/Kconfig
+++ /dev/null
@@ -1,44 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0-only
-#
-# Open-Channel SSD NVM configuration
-#
-
-menuconfig NVM
-	bool "Open-Channel SSD target support (DEPRECATED)"
-	depends on BLOCK
-	help
-	  Say Y here to get to enable Open-channel SSDs.
-
-	  Open-Channel SSDs implement a set of extension to SSDs, that
-	  exposes direct access to the underlying non-volatile memory.
-
-	  If you say N, all options in this submenu will be skipped and disabled
-	  only do this if you know what you are doing.
-
-	  This code is deprecated and will be removed in Linux 5.15.
-
-if NVM
-
-config NVM_PBLK
-	tristate "Physical Block Device Open-Channel SSD target"
-	select CRC32
-	help
-	  Allows an open-channel SSD to be exposed as a block device to the
-	  host. The target assumes the device exposes raw flash and must be
-	  explicitly managed by the host.
-
-	  Please note the disk format is considered EXPERIMENTAL for now.
-
-if NVM_PBLK
-
-config NVM_PBLK_DEBUG
-	bool "PBlk Debug Support"
-	default n
-	help
-	  Enables debug support for pblk. This includes extra checks, more
-	  vocal error messages, and extra tracking fields in the pblk sysfs
-	  entries.
-
-endif # NVM_PBLK_DEBUG
-
-endif # NVM
diff --git a/drivers/lightnvm/Makefile b/drivers/lightnvm/Makefile
deleted file mode 100644
index 97d9d7c71550..000000000000
--- a/drivers/lightnvm/Makefile
+++ /dev/null
@@ -1,11 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-#
-# Makefile for Open-Channel SSDs.
-#
-
-obj-$(CONFIG_NVM)		:= core.o
-obj-$(CONFIG_NVM_PBLK)		+= pblk.o
-pblk-y				:= pblk-init.o pblk-core.o pblk-rb.o \
-				   pblk-write.o pblk-cache.o pblk-read.o \
-				   pblk-gc.o pblk-recovery.o pblk-map.o \
-				   pblk-rl.o pblk-sysfs.o
diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
deleted file mode 100644
index cf8a75494833..000000000000
--- a/drivers/lightnvm/core.c
+++ /dev/null
@@ -1,1440 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Copyright (C) 2015 IT University of Copenhagen. All rights reserved.
- * Initial release: Matias Bjorling <m@bjorling.me>
- */
-
-#define pr_fmt(fmt) "nvm: " fmt
-
-#include <linux/list.h>
-#include <linux/types.h>
-#include <linux/sem.h>
-#include <linux/bitmap.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/miscdevice.h>
-#include <linux/lightnvm.h>
-#include <linux/sched/sysctl.h>
-
-static LIST_HEAD(nvm_tgt_types);
-static DECLARE_RWSEM(nvm_tgtt_lock);
-static LIST_HEAD(nvm_devices);
-static DECLARE_RWSEM(nvm_lock);
-
-/* Map between virtual and physical channel and lun */
-struct nvm_ch_map {
-	int ch_off;
-	int num_lun;
-	int *lun_offs;
-};
-
-struct nvm_dev_map {
-	struct nvm_ch_map *chnls;
-	int num_ch;
-};
-
-static void nvm_free(struct kref *ref);
-
-static struct nvm_target *nvm_find_target(struct nvm_dev *dev, const char *name)
-{
-	struct nvm_target *tgt;
-
-	list_for_each_entry(tgt, &dev->targets, list)
-		if (!strcmp(name, tgt->disk->disk_name))
-			return tgt;
-
-	return NULL;
-}
-
-static bool nvm_target_exists(const char *name)
-{
-	struct nvm_dev *dev;
-	struct nvm_target *tgt;
-	bool ret = false;
-
-	down_write(&nvm_lock);
-	list_for_each_entry(dev, &nvm_devices, devices) {
-		mutex_lock(&dev->mlock);
-		list_for_each_entry(tgt, &dev->targets, list) {
-			if (!strcmp(name, tgt->disk->disk_name)) {
-				ret = true;
-				mutex_unlock(&dev->mlock);
-				goto out;
-			}
-		}
-		mutex_unlock(&dev->mlock);
-	}
-
-out:
-	up_write(&nvm_lock);
-	return ret;
-}
-
-static int nvm_reserve_luns(struct nvm_dev *dev, int lun_begin, int lun_end)
-{
-	int i;
-
-	for (i = lun_begin; i <= lun_end; i++) {
-		if (test_and_set_bit(i, dev->lun_map)) {
-			pr_err("lun %d already allocated\n", i);
-			goto err;
-		}
-	}
-
-	return 0;
-err:
-	while (--i >= lun_begin)
-		clear_bit(i, dev->lun_map);
-
-	return -EBUSY;
-}
-
-static void nvm_release_luns_err(struct nvm_dev *dev, int lun_begin,
-				 int lun_end)
-{
-	int i;
-
-	for (i = lun_begin; i <= lun_end; i++)
-		WARN_ON(!test_and_clear_bit(i, dev->lun_map));
-}
-
-static void nvm_remove_tgt_dev(struct nvm_tgt_dev *tgt_dev, int clear)
-{
-	struct nvm_dev *dev = tgt_dev->parent;
-	struct nvm_dev_map *dev_map = tgt_dev->map;
-	int i, j;
-
-	for (i = 0; i < dev_map->num_ch; i++) {
-		struct nvm_ch_map *ch_map = &dev_map->chnls[i];
-		int *lun_offs = ch_map->lun_offs;
-		int ch = i + ch_map->ch_off;
-
-		if (clear) {
-			for (j = 0; j < ch_map->num_lun; j++) {
-				int lun = j + lun_offs[j];
-				int lunid = (ch * dev->geo.num_lun) + lun;
-
-				WARN_ON(!test_and_clear_bit(lunid,
-							dev->lun_map));
-			}
-		}
-
-		kfree(ch_map->lun_offs);
-	}
-
-	kfree(dev_map->chnls);
-	kfree(dev_map);
-
-	kfree(tgt_dev->luns);
-	kfree(tgt_dev);
-}
-
-static struct nvm_tgt_dev *nvm_create_tgt_dev(struct nvm_dev *dev,
-					      u16 lun_begin, u16 lun_end,
-					      u16 op)
-{
-	struct nvm_tgt_dev *tgt_dev = NULL;
-	struct nvm_dev_map *dev_rmap = dev->rmap;
-	struct nvm_dev_map *dev_map;
-	struct ppa_addr *luns;
-	int num_lun = lun_end - lun_begin + 1;
-	int luns_left = num_lun;
-	int num_ch = num_lun / dev->geo.num_lun;
-	int num_ch_mod = num_lun % dev->geo.num_lun;
-	int bch = lun_begin / dev->geo.num_lun;
-	int blun = lun_begin % dev->geo.num_lun;
-	int lunid = 0;
-	int lun_balanced = 1;
-	int sec_per_lun, prev_num_lun;
-	int i, j;
-
-	num_ch = (num_ch_mod == 0) ? num_ch : num_ch + 1;
-
-	dev_map = kmalloc(sizeof(struct nvm_dev_map), GFP_KERNEL);
-	if (!dev_map)
-		goto err_dev;
-
-	dev_map->chnls = kcalloc(num_ch, sizeof(struct nvm_ch_map), GFP_KERNEL);
-	if (!dev_map->chnls)
-		goto err_chnls;
-
-	luns = kcalloc(num_lun, sizeof(struct ppa_addr), GFP_KERNEL);
-	if (!luns)
-		goto err_luns;
-
-	prev_num_lun = (luns_left > dev->geo.num_lun) ?
-					dev->geo.num_lun : luns_left;
-	for (i = 0; i < num_ch; i++) {
-		struct nvm_ch_map *ch_rmap = &dev_rmap->chnls[i + bch];
-		int *lun_roffs = ch_rmap->lun_offs;
-		struct nvm_ch_map *ch_map = &dev_map->chnls[i];
-		int *lun_offs;
-		int luns_in_chnl = (luns_left > dev->geo.num_lun) ?
-					dev->geo.num_lun : luns_left;
-
-		if (lun_balanced && prev_num_lun != luns_in_chnl)
-			lun_balanced = 0;
-
-		ch_map->ch_off = ch_rmap->ch_off = bch;
-		ch_map->num_lun = luns_in_chnl;
-
-		lun_offs = kcalloc(luns_in_chnl, sizeof(int), GFP_KERNEL);
-		if (!lun_offs)
-			goto err_ch;
-
-		for (j = 0; j < luns_in_chnl; j++) {
-			luns[lunid].ppa = 0;
-			luns[lunid].a.ch = i;
-			luns[lunid++].a.lun = j;
-
-			lun_offs[j] = blun;
-			lun_roffs[j + blun] = blun;
-		}
-
-		ch_map->lun_offs = lun_offs;
-
-		/* when starting a new channel, lun offset is reset */
-		blun = 0;
-		luns_left -= luns_in_chnl;
-	}
-
-	dev_map->num_ch = num_ch;
-
-	tgt_dev = kmalloc(sizeof(struct nvm_tgt_dev), GFP_KERNEL);
-	if (!tgt_dev)
-		goto err_ch;
-
-	/* Inherit device geometry from parent */
-	memcpy(&tgt_dev->geo, &dev->geo, sizeof(struct nvm_geo));
-
-	/* Target device only owns a portion of the physical device */
-	tgt_dev->geo.num_ch = num_ch;
-	tgt_dev->geo.num_lun = (lun_balanced) ? prev_num_lun : -1;
-	tgt_dev->geo.all_luns = num_lun;
-	tgt_dev->geo.all_chunks = num_lun * dev->geo.num_chk;
-
-	tgt_dev->geo.op = op;
-
-	sec_per_lun = dev->geo.clba * dev->geo.num_chk;
-	tgt_dev->geo.total_secs = num_lun * sec_per_lun;
-
-	tgt_dev->q = dev->q;
-	tgt_dev->map = dev_map;
-	tgt_dev->luns = luns;
-	tgt_dev->parent = dev;
-
-	return tgt_dev;
-err_ch:
-	while (--i >= 0)
-		kfree(dev_map->chnls[i].lun_offs);
-	kfree(luns);
-err_luns:
-	kfree(dev_map->chnls);
-err_chnls:
-	kfree(dev_map);
-err_dev:
-	return tgt_dev;
-}
-
-static struct nvm_tgt_type *__nvm_find_target_type(const char *name)
-{
-	struct nvm_tgt_type *tt;
-
-	list_for_each_entry(tt, &nvm_tgt_types, list)
-		if (!strcmp(name, tt->name))
-			return tt;
-
-	return NULL;
-}
-
-static struct nvm_tgt_type *nvm_find_target_type(const char *name)
-{
-	struct nvm_tgt_type *tt;
-
-	down_write(&nvm_tgtt_lock);
-	tt = __nvm_find_target_type(name);
-	up_write(&nvm_tgtt_lock);
-
-	return tt;
-}
-
-static int nvm_config_check_luns(struct nvm_geo *geo, int lun_begin,
-				 int lun_end)
-{
-	if (lun_begin > lun_end || lun_end >= geo->all_luns) {
-		pr_err("lun out of bound (%u:%u > %u)\n",
-			lun_begin, lun_end, geo->all_luns - 1);
-		return -EINVAL;
-	}
-
-	return 0;
-}
-
-static int __nvm_config_simple(struct nvm_dev *dev,
-			       struct nvm_ioctl_create_simple *s)
-{
-	struct nvm_geo *geo = &dev->geo;
-
-	if (s->lun_begin == -1 && s->lun_end == -1) {
-		s->lun_begin = 0;
-		s->lun_end = geo->all_luns - 1;
-	}
-
-	return nvm_config_check_luns(geo, s->lun_begin, s->lun_end);
-}
-
-static int __nvm_config_extended(struct nvm_dev *dev,
-				 struct nvm_ioctl_create_extended *e)
-{
-	if (e->lun_begin == 0xFFFF && e->lun_end == 0xFFFF) {
-		e->lun_begin = 0;
-		e->lun_end = dev->geo.all_luns - 1;
-	}
-
-	/* op not set falls into target's default */
-	if (e->op == 0xFFFF) {
-		e->op = NVM_TARGET_DEFAULT_OP;
-	} else if (e->op < NVM_TARGET_MIN_OP || e->op > NVM_TARGET_MAX_OP) {
-		pr_err("invalid over provisioning value\n");
-		return -EINVAL;
-	}
-
-	return nvm_config_check_luns(&dev->geo, e->lun_begin, e->lun_end);
-}
-
-static int nvm_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create)
-{
-	struct nvm_ioctl_create_extended e;
-	struct gendisk *tdisk;
-	struct nvm_tgt_type *tt;
-	struct nvm_target *t;
-	struct nvm_tgt_dev *tgt_dev;
-	void *targetdata;
-	unsigned int mdts;
-	int ret;
-
-	switch (create->conf.type) {
-	case NVM_CONFIG_TYPE_SIMPLE:
-		ret = __nvm_config_simple(dev, &create->conf.s);
-		if (ret)
-			return ret;
-
-		e.lun_begin = create->conf.s.lun_begin;
-		e.lun_end = create->conf.s.lun_end;
-		e.op = NVM_TARGET_DEFAULT_OP;
-		break;
-	case NVM_CONFIG_TYPE_EXTENDED:
-		ret = __nvm_config_extended(dev, &create->conf.e);
-		if (ret)
-			return ret;
-
-		e = create->conf.e;
-		break;
-	default:
-		pr_err("config type not valid\n");
-		return -EINVAL;
-	}
-
-	tt = nvm_find_target_type(create->tgttype);
-	if (!tt) {
-		pr_err("target type %s not found\n", create->tgttype);
-		return -EINVAL;
-	}
-
-	if ((tt->flags & NVM_TGT_F_HOST_L2P) != (dev->geo.dom & NVM_RSP_L2P)) {
-		pr_err("device is incompatible with target L2P type.\n");
-		return -EINVAL;
-	}
-
-	if (nvm_target_exists(create->tgtname)) {
-		pr_err("target name already exists (%s)\n",
-							create->tgtname);
-		return -EINVAL;
-	}
-
-	ret = nvm_reserve_luns(dev, e.lun_begin, e.lun_end);
-	if (ret)
-		return ret;
-
-	t = kmalloc(sizeof(struct nvm_target), GFP_KERNEL);
-	if (!t) {
-		ret = -ENOMEM;
-		goto err_reserve;
-	}
-
-	tgt_dev = nvm_create_tgt_dev(dev, e.lun_begin, e.lun_end, e.op);
-	if (!tgt_dev) {
-		pr_err("could not create target device\n");
-		ret = -ENOMEM;
-		goto err_t;
-	}
-
-	tdisk = blk_alloc_disk(dev->q->node);
-	if (!tdisk) {
-		ret = -ENOMEM;
-		goto err_dev;
-	}
-
-	strlcpy(tdisk->disk_name, create->tgtname, sizeof(tdisk->disk_name));
-	tdisk->major = 0;
-	tdisk->first_minor = 0;
-	tdisk->fops = tt->bops;
-
-	targetdata = tt->init(tgt_dev, tdisk, create->flags);
-	if (IS_ERR(targetdata)) {
-		ret = PTR_ERR(targetdata);
-		goto err_init;
-	}
-
-	tdisk->private_data = targetdata;
-	tdisk->queue->queuedata = targetdata;
-
-	mdts = (dev->geo.csecs >> 9) * NVM_MAX_VLBA;
-	if (dev->geo.mdts) {
-		mdts = min_t(u32, dev->geo.mdts,
-				(dev->geo.csecs >> 9) * NVM_MAX_VLBA);
-	}
-	blk_queue_max_hw_sectors(tdisk->queue, mdts);
-
-	set_capacity(tdisk, tt->capacity(targetdata));
-	add_disk(tdisk);
-
-	if (tt->sysfs_init && tt->sysfs_init(tdisk)) {
-		ret = -ENOMEM;
-		goto err_sysfs;
-	}
-
-	t->type = tt;
-	t->disk = tdisk;
-	t->dev = tgt_dev;
-
-	mutex_lock(&dev->mlock);
-	list_add_tail(&t->list, &dev->targets);
-	mutex_unlock(&dev->mlock);
-
-	__module_get(tt->owner);
-
-	return 0;
-err_sysfs:
-	if (tt->exit)
-		tt->exit(targetdata, true);
-err_init:
-	blk_cleanup_disk(tdisk);
-err_dev:
-	nvm_remove_tgt_dev(tgt_dev, 0);
-err_t:
-	kfree(t);
-err_reserve:
-	nvm_release_luns_err(dev, e.lun_begin, e.lun_end);
-	return ret;
-}
-
-static void __nvm_remove_target(struct nvm_target *t, bool graceful)
-{
-	struct nvm_tgt_type *tt = t->type;
-	struct gendisk *tdisk = t->disk;
-
-	del_gendisk(tdisk);
-
-	if (tt->sysfs_exit)
-		tt->sysfs_exit(tdisk);
-
-	if (tt->exit)
-		tt->exit(tdisk->private_data, graceful);
-
-	nvm_remove_tgt_dev(t->dev, 1);
-	blk_cleanup_disk(tdisk);
-	module_put(t->type->owner);
-
-	list_del(&t->list);
-	kfree(t);
-}
-
-/**
- * nvm_remove_tgt - Removes a target from the media manager
- * @remove:	ioctl structure with target name to remove.
- *
- * Returns:
- * 0: on success
- * 1: on not found
- * <0: on error
- */
-static int nvm_remove_tgt(struct nvm_ioctl_remove *remove)
-{
-	struct nvm_target *t = NULL;
-	struct nvm_dev *dev;
-
-	down_read(&nvm_lock);
-	list_for_each_entry(dev, &nvm_devices, devices) {
-		mutex_lock(&dev->mlock);
-		t = nvm_find_target(dev, remove->tgtname);
-		if (t) {
-			mutex_unlock(&dev->mlock);
-			break;
-		}
-		mutex_unlock(&dev->mlock);
-	}
-	up_read(&nvm_lock);
-
-	if (!t) {
-		pr_err("failed to remove target %s\n",
-				remove->tgtname);
-		return 1;
-	}
-
-	__nvm_remove_target(t, true);
-	kref_put(&dev->ref, nvm_free);
-
-	return 0;
-}
-
-static int nvm_register_map(struct nvm_dev *dev)
-{
-	struct nvm_dev_map *rmap;
-	int i, j;
-
-	rmap = kmalloc(sizeof(struct nvm_dev_map), GFP_KERNEL);
-	if (!rmap)
-		goto err_rmap;
-
-	rmap->chnls = kcalloc(dev->geo.num_ch, sizeof(struct nvm_ch_map),
-								GFP_KERNEL);
-	if (!rmap->chnls)
-		goto err_chnls;
-
-	for (i = 0; i < dev->geo.num_ch; i++) {
-		struct nvm_ch_map *ch_rmap;
-		int *lun_roffs;
-		int luns_in_chnl = dev->geo.num_lun;
-
-		ch_rmap = &rmap->chnls[i];
-
-		ch_rmap->ch_off = -1;
-		ch_rmap->num_lun = luns_in_chnl;
-
-		lun_roffs = kcalloc(luns_in_chnl, sizeof(int), GFP_KERNEL);
-		if (!lun_roffs)
-			goto err_ch;
-
-		for (j = 0; j < luns_in_chnl; j++)
-			lun_roffs[j] = -1;
-
-		ch_rmap->lun_offs = lun_roffs;
-	}
-
-	dev->rmap = rmap;
-
-	return 0;
-err_ch:
-	while (--i >= 0)
-		kfree(rmap->chnls[i].lun_offs);
-err_chnls:
-	kfree(rmap);
-err_rmap:
-	return -ENOMEM;
-}
-
-static void nvm_unregister_map(struct nvm_dev *dev)
-{
-	struct nvm_dev_map *rmap = dev->rmap;
-	int i;
-
-	for (i = 0; i < dev->geo.num_ch; i++)
-		kfree(rmap->chnls[i].lun_offs);
-
-	kfree(rmap->chnls);
-	kfree(rmap);
-}
-
-static void nvm_map_to_dev(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *p)
-{
-	struct nvm_dev_map *dev_map = tgt_dev->map;
-	struct nvm_ch_map *ch_map = &dev_map->chnls[p->a.ch];
-	int lun_off = ch_map->lun_offs[p->a.lun];
-
-	p->a.ch += ch_map->ch_off;
-	p->a.lun += lun_off;
-}
-
-static void nvm_map_to_tgt(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *p)
-{
-	struct nvm_dev *dev = tgt_dev->parent;
-	struct nvm_dev_map *dev_rmap = dev->rmap;
-	struct nvm_ch_map *ch_rmap = &dev_rmap->chnls[p->a.ch];
-	int lun_roff = ch_rmap->lun_offs[p->a.lun];
-
-	p->a.ch -= ch_rmap->ch_off;
-	p->a.lun -= lun_roff;
-}
-
-static void nvm_ppa_tgt_to_dev(struct nvm_tgt_dev *tgt_dev,
-				struct ppa_addr *ppa_list, int nr_ppas)
-{
-	int i;
-
-	for (i = 0; i < nr_ppas; i++) {
-		nvm_map_to_dev(tgt_dev, &ppa_list[i]);
-		ppa_list[i] = generic_to_dev_addr(tgt_dev->parent, ppa_list[i]);
-	}
-}
-
-static void nvm_ppa_dev_to_tgt(struct nvm_tgt_dev *tgt_dev,
-				struct ppa_addr *ppa_list, int nr_ppas)
-{
-	int i;
-
-	for (i = 0; i < nr_ppas; i++) {
-		ppa_list[i] = dev_to_generic_addr(tgt_dev->parent, ppa_list[i]);
-		nvm_map_to_tgt(tgt_dev, &ppa_list[i]);
-	}
-}
-
-static void nvm_rq_tgt_to_dev(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd)
-{
-	struct ppa_addr *ppa_list = nvm_rq_to_ppa_list(rqd);
-
-	nvm_ppa_tgt_to_dev(tgt_dev, ppa_list, rqd->nr_ppas);
-}
-
-static void nvm_rq_dev_to_tgt(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd)
-{
-	struct ppa_addr *ppa_list = nvm_rq_to_ppa_list(rqd);
-
-	nvm_ppa_dev_to_tgt(tgt_dev, ppa_list, rqd->nr_ppas);
-}
-
-int nvm_register_tgt_type(struct nvm_tgt_type *tt)
-{
-	int ret = 0;
-
-	down_write(&nvm_tgtt_lock);
-	if (__nvm_find_target_type(tt->name))
-		ret = -EEXIST;
-	else
-		list_add(&tt->list, &nvm_tgt_types);
-	up_write(&nvm_tgtt_lock);
-
-	return ret;
-}
-EXPORT_SYMBOL(nvm_register_tgt_type);
-
-void nvm_unregister_tgt_type(struct nvm_tgt_type *tt)
-{
-	if (!tt)
-		return;
-
-	down_write(&nvm_tgtt_lock);
-	list_del(&tt->list);
-	up_write(&nvm_tgtt_lock);
-}
-EXPORT_SYMBOL(nvm_unregister_tgt_type);
-
-void *nvm_dev_dma_alloc(struct nvm_dev *dev, gfp_t mem_flags,
-							dma_addr_t *dma_handler)
-{
-	return dev->ops->dev_dma_alloc(dev, dev->dma_pool, mem_flags,
-								dma_handler);
-}
-EXPORT_SYMBOL(nvm_dev_dma_alloc);
-
-void nvm_dev_dma_free(struct nvm_dev *dev, void *addr, dma_addr_t dma_handler)
-{
-	dev->ops->dev_dma_free(dev->dma_pool, addr, dma_handler);
-}
-EXPORT_SYMBOL(nvm_dev_dma_free);
-
-static struct nvm_dev *nvm_find_nvm_dev(const char *name)
-{
-	struct nvm_dev *dev;
-
-	list_for_each_entry(dev, &nvm_devices, devices)
-		if (!strcmp(name, dev->name))
-			return dev;
-
-	return NULL;
-}
-
-static int nvm_set_rqd_ppalist(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd,
-			const struct ppa_addr *ppas, int nr_ppas)
-{
-	struct nvm_dev *dev = tgt_dev->parent;
-	struct nvm_geo *geo = &tgt_dev->geo;
-	int i, plane_cnt, pl_idx;
-	struct ppa_addr ppa;
-
-	if (geo->pln_mode == NVM_PLANE_SINGLE && nr_ppas == 1) {
-		rqd->nr_ppas = nr_ppas;
-		rqd->ppa_addr = ppas[0];
-
-		return 0;
-	}
-
-	rqd->nr_ppas = nr_ppas;
-	rqd->ppa_list = nvm_dev_dma_alloc(dev, GFP_KERNEL, &rqd->dma_ppa_list);
-	if (!rqd->ppa_list) {
-		pr_err("failed to allocate dma memory\n");
-		return -ENOMEM;
-	}
-
-	plane_cnt = geo->pln_mode;
-	rqd->nr_ppas *= plane_cnt;
-
-	for (i = 0; i < nr_ppas; i++) {
-		for (pl_idx = 0; pl_idx < plane_cnt; pl_idx++) {
-			ppa = ppas[i];
-			ppa.g.pl = pl_idx;
-			rqd->ppa_list[(pl_idx * nr_ppas) + i] = ppa;
-		}
-	}
-
-	return 0;
-}
-
-static void nvm_free_rqd_ppalist(struct nvm_tgt_dev *tgt_dev,
-			struct nvm_rq *rqd)
-{
-	if (!rqd->ppa_list)
-		return;
-
-	nvm_dev_dma_free(tgt_dev->parent, rqd->ppa_list, rqd->dma_ppa_list);
-}
-
-static int nvm_set_flags(struct nvm_geo *geo, struct nvm_rq *rqd)
-{
-	int flags = 0;
-
-	if (geo->version == NVM_OCSSD_SPEC_20)
-		return 0;
-
-	if (rqd->is_seq)
-		flags |= geo->pln_mode >> 1;
-
-	if (rqd->opcode == NVM_OP_PREAD)
-		flags |= (NVM_IO_SCRAMBLE_ENABLE | NVM_IO_SUSPEND);
-	else if (rqd->opcode == NVM_OP_PWRITE)
-		flags |= NVM_IO_SCRAMBLE_ENABLE;
-
-	return flags;
-}
-
-int nvm_submit_io(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd, void *buf)
-{
-	struct nvm_dev *dev = tgt_dev->parent;
-	int ret;
-
-	if (!dev->ops->submit_io)
-		return -ENODEV;
-
-	nvm_rq_tgt_to_dev(tgt_dev, rqd);
-
-	rqd->dev = tgt_dev;
-	rqd->flags = nvm_set_flags(&tgt_dev->geo, rqd);
-
-	/* In case of error, fail with right address format */
-	ret = dev->ops->submit_io(dev, rqd, buf);
-	if (ret)
-		nvm_rq_dev_to_tgt(tgt_dev, rqd);
-	return ret;
-}
-EXPORT_SYMBOL(nvm_submit_io);
-
-static void nvm_sync_end_io(struct nvm_rq *rqd)
-{
-	struct completion *waiting = rqd->private;
-
-	complete(waiting);
-}
-
-static int nvm_submit_io_wait(struct nvm_dev *dev, struct nvm_rq *rqd,
-			      void *buf)
-{
-	DECLARE_COMPLETION_ONSTACK(wait);
-	int ret = 0;
-
-	rqd->end_io = nvm_sync_end_io;
-	rqd->private = &wait;
-
-	ret = dev->ops->submit_io(dev, rqd, buf);
-	if (ret)
-		return ret;
-
-	wait_for_completion_io(&wait);
-
-	return 0;
-}
-
-int nvm_submit_io_sync(struct nvm_tgt_dev *tgt_dev, struct nvm_rq *rqd,
-		       void *buf)
-{
-	struct nvm_dev *dev = tgt_dev->parent;
-	int ret;
-
-	if (!dev->ops->submit_io)
-		return -ENODEV;
-
-	nvm_rq_tgt_to_dev(tgt_dev, rqd);
-
-	rqd->dev = tgt_dev;
-	rqd->flags = nvm_set_flags(&tgt_dev->geo, rqd);
-
-	ret = nvm_submit_io_wait(dev, rqd, buf);
-
-	return ret;
-}
-EXPORT_SYMBOL(nvm_submit_io_sync);
-
-void nvm_end_io(struct nvm_rq *rqd)
-{
-	struct nvm_tgt_dev *tgt_dev = rqd->dev;
-
-	/* Convert address space */
-	if (tgt_dev)
-		nvm_rq_dev_to_tgt(tgt_dev, rqd);
-
-	if (rqd->end_io)
-		rqd->end_io(rqd);
-}
-EXPORT_SYMBOL(nvm_end_io);
-
-static int nvm_submit_io_sync_raw(struct nvm_dev *dev, struct nvm_rq *rqd)
-{
-	if (!dev->ops->submit_io)
-		return -ENODEV;
-
-	rqd->dev = NULL;
-	rqd->flags = nvm_set_flags(&dev->geo, rqd);
-
-	return nvm_submit_io_wait(dev, rqd, NULL);
-}
-
-static int nvm_bb_chunk_sense(struct nvm_dev *dev, struct ppa_addr ppa)
-{
-	struct nvm_rq rqd = { NULL };
-	struct bio bio;
-	struct bio_vec bio_vec;
-	struct page *page;
-	int ret;
-
-	page = alloc_page(GFP_KERNEL);
-	if (!page)
-		return -ENOMEM;
-
-	bio_init(&bio, &bio_vec, 1);
-	bio_add_page(&bio, page, PAGE_SIZE, 0);
-	bio_set_op_attrs(&bio, REQ_OP_READ, 0);
-
-	rqd.bio = &bio;
-	rqd.opcode = NVM_OP_PREAD;
-	rqd.is_seq = 1;
-	rqd.nr_ppas = 1;
-	rqd.ppa_addr = generic_to_dev_addr(dev, ppa);
-
-	ret = nvm_submit_io_sync_raw(dev, &rqd);
-	__free_page(page);
-	if (ret)
-		return ret;
-
-	return rqd.error;
-}
-
-/*
- * Scans a 1.2 chunk first and last page to determine if its state.
- * If the chunk is found to be open, also scan it to update the write
- * pointer.
- */
-static int nvm_bb_chunk_scan(struct nvm_dev *dev, struct ppa_addr ppa,
-			     struct nvm_chk_meta *meta)
-{
-	struct nvm_geo *geo = &dev->geo;
-	int ret, pg, pl;
-
-	/* sense first page */
-	ret = nvm_bb_chunk_sense(dev, ppa);
-	if (ret < 0) /* io error */
-		return ret;
-	else if (ret == 0) /* valid data */
-		meta->state = NVM_CHK_ST_OPEN;
-	else if (ret > 0) {
-		/*
-		 * If empty page, the chunk is free, else it is an
-		 * actual io error. In that case, mark it offline.
-		 */
-		switch (ret) {
-		case NVM_RSP_ERR_EMPTYPAGE:
-			meta->state = NVM_CHK_ST_FREE;
-			return 0;
-		case NVM_RSP_ERR_FAILCRC:
-		case NVM_RSP_ERR_FAILECC:
-		case NVM_RSP_WARN_HIGHECC:
-			meta->state = NVM_CHK_ST_OPEN;
-			goto scan;
-		default:
-			return -ret; /* other io error */
-		}
-	}
-
-	/* sense last page */
-	ppa.g.pg = geo->num_pg - 1;
-	ppa.g.pl = geo->num_pln - 1;
-
-	ret = nvm_bb_chunk_sense(dev, ppa);
-	if (ret < 0) /* io error */
-		return ret;
-	else if (ret == 0) { /* Chunk fully written */
-		meta->state = NVM_CHK_ST_CLOSED;
-		meta->wp = geo->clba;
-		return 0;
-	} else if (ret > 0) {
-		switch (ret) {
-		case NVM_RSP_ERR_EMPTYPAGE:
-		case NVM_RSP_ERR_FAILCRC:
-		case NVM_RSP_ERR_FAILECC:
-		case NVM_RSP_WARN_HIGHECC:
-			meta->state = NVM_CHK_ST_OPEN;
-			break;
-		default:
-			return -ret; /* other io error */
-		}
-	}
-
-scan:
-	/*
-	 * chunk is open, we scan sequentially to update the write pointer.
-	 * We make the assumption that targets write data across all planes
-	 * before moving to the next page.
-	 */
-	for (pg = 0; pg < geo->num_pg; pg++) {
-		for (pl = 0; pl < geo->num_pln; pl++) {
-			ppa.g.pg = pg;
-			ppa.g.pl = pl;
-
-			ret = nvm_bb_chunk_sense(dev, ppa);
-			if (ret < 0) /* io error */
-				return ret;
-			else if (ret == 0) {
-				meta->wp += geo->ws_min;
-			} else if (ret > 0) {
-				switch (ret) {
-				case NVM_RSP_ERR_EMPTYPAGE:
-					return 0;
-				case NVM_RSP_ERR_FAILCRC:
-				case NVM_RSP_ERR_FAILECC:
-				case NVM_RSP_WARN_HIGHECC:
-					meta->wp += geo->ws_min;
-					break;
-				default:
-					return -ret; /* other io error */
-				}
-			}
-		}
-	}
-
-	return 0;
-}
-
-/*
- * folds a bad block list from its plane representation to its
- * chunk representation.
- *
- * If any of the planes status are bad or grown bad, the chunk is marked
- * offline. If not bad, the first plane state acts as the chunk state.
- */
-static int nvm_bb_to_chunk(struct nvm_dev *dev, struct ppa_addr ppa,
-			   u8 *blks, int nr_blks, struct nvm_chk_meta *meta)
-{
-	struct nvm_geo *geo = &dev->geo;
-	int ret, blk, pl, offset, blktype;
-
-	for (blk = 0; blk < geo->num_chk; blk++) {
-		offset = blk * geo->pln_mode;
-		blktype = blks[offset];
-
-		for (pl = 0; pl < geo->pln_mode; pl++) {
-			if (blks[offset + pl] &
-					(NVM_BLK_T_BAD|NVM_BLK_T_GRWN_BAD)) {
-				blktype = blks[offset + pl];
-				break;
-			}
-		}
-
-		ppa.g.blk = blk;
-
-		meta->wp = 0;
-		meta->type = NVM_CHK_TP_W_SEQ;
-		meta->wi = 0;
-		meta->slba = generic_to_dev_addr(dev, ppa).ppa;
-		meta->cnlb = dev->geo.clba;
-
-		if (blktype == NVM_BLK_T_FREE) {
-			ret = nvm_bb_chunk_scan(dev, ppa, meta);
-			if (ret)
-				return ret;
-		} else {
-			meta->state = NVM_CHK_ST_OFFLINE;
-		}
-
-		meta++;
-	}
-
-	return 0;
-}
-
-static int nvm_get_bb_meta(struct nvm_dev *dev, sector_t slba,
-			   int nchks, struct nvm_chk_meta *meta)
-{
-	struct nvm_geo *geo = &dev->geo;
-	struct ppa_addr ppa;
-	u8 *blks;
-	int ch, lun, nr_blks;
-	int ret = 0;
-
-	ppa.ppa = slba;
-	ppa = dev_to_generic_addr(dev, ppa);
-
-	if (ppa.g.blk != 0)
-		return -EINVAL;
-
-	if ((nchks % geo->num_chk) != 0)
-		return -EINVAL;
-
-	nr_blks = geo->num_chk * geo->pln_mode;
-
-	blks = kmalloc(nr_blks, GFP_KERNEL);
-	if (!blks)
-		return -ENOMEM;
-
-	for (ch = ppa.g.ch; ch < geo->num_ch; ch++) {
-		for (lun = ppa.g.lun; lun < geo->num_lun; lun++) {
-			struct ppa_addr ppa_gen, ppa_dev;
-
-			if (!nchks)
-				goto done;
-
-			ppa_gen.ppa = 0;
-			ppa_gen.g.ch = ch;
-			ppa_gen.g.lun = lun;
-			ppa_dev = generic_to_dev_addr(dev, ppa_gen);
-
-			ret = dev->ops->get_bb_tbl(dev, ppa_dev, blks);
-			if (ret)
-				goto done;
-
-			ret = nvm_bb_to_chunk(dev, ppa_gen, blks, nr_blks,
-									meta);
-			if (ret)
-				goto done;
-
-			meta += geo->num_chk;
-			nchks -= geo->num_chk;
-		}
-	}
-done:
-	kfree(blks);
-	return ret;
-}
-
-int nvm_get_chunk_meta(struct nvm_tgt_dev *tgt_dev, struct ppa_addr ppa,
-		       int nchks, struct nvm_chk_meta *meta)
-{
-	struct nvm_dev *dev = tgt_dev->parent;
-
-	nvm_ppa_tgt_to_dev(tgt_dev, &ppa, 1);
-
-	if (dev->geo.version == NVM_OCSSD_SPEC_12)
-		return nvm_get_bb_meta(dev, (sector_t)ppa.ppa, nchks, meta);
-
-	return dev->ops->get_chk_meta(dev, (sector_t)ppa.ppa, nchks, meta);
-}
-EXPORT_SYMBOL_GPL(nvm_get_chunk_meta);
-
-int nvm_set_chunk_meta(struct nvm_tgt_dev *tgt_dev, struct ppa_addr *ppas,
-		       int nr_ppas, int type)
-{
-	struct nvm_dev *dev = tgt_dev->parent;
-	struct nvm_rq rqd;
-	int ret;
-
-	if (dev->geo.version == NVM_OCSSD_SPEC_20)
-		return 0;
-
-	if (nr_ppas > NVM_MAX_VLBA) {
-		pr_err("unable to update all blocks atomically\n");
-		return -EINVAL;
-	}
-
-	memset(&rqd, 0, sizeof(struct nvm_rq));
-
-	nvm_set_rqd_ppalist(tgt_dev, &rqd, ppas, nr_ppas);
-	nvm_rq_tgt_to_dev(tgt_dev, &rqd);
-
-	ret = dev->ops->set_bb_tbl(dev, &rqd.ppa_addr, rqd.nr_ppas, type);
-	nvm_free_rqd_ppalist(tgt_dev, &rqd);
-	if (ret)
-		return -EINVAL;
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(nvm_set_chunk_meta);
-
-static int nvm_core_init(struct nvm_dev *dev)
-{
-	struct nvm_geo *geo = &dev->geo;
-	int ret;
-
-	dev->lun_map = kcalloc(BITS_TO_LONGS(geo->all_luns),
-					sizeof(unsigned long), GFP_KERNEL);
-	if (!dev->lun_map)
-		return -ENOMEM;
-
-	INIT_LIST_HEAD(&dev->area_list);
-	INIT_LIST_HEAD(&dev->targets);
-	mutex_init(&dev->mlock);
-	spin_lock_init(&dev->lock);
-
-	ret = nvm_register_map(dev);
-	if (ret)
-		goto err_fmtype;
-
-	return 0;
-err_fmtype:
-	kfree(dev->lun_map);
-	return ret;
-}
-
-static void nvm_free(struct kref *ref)
-{
-	struct nvm_dev *dev = container_of(ref, struct nvm_dev, ref);
-
-	if (dev->dma_pool)
-		dev->ops->destroy_dma_pool(dev->dma_pool);
-
-	if (dev->rmap)
-		nvm_unregister_map(dev);
-
-	kfree(dev->lun_map);
-	kfree(dev);
-}
-
-static int nvm_init(struct nvm_dev *dev)
-{
-	struct nvm_geo *geo = &dev->geo;
-	int ret = -EINVAL;
-
-	if (dev->ops->identity(dev)) {
-		pr_err("device could not be identified\n");
-		goto err;
-	}
-
-	pr_debug("ver:%u.%u nvm_vendor:%x\n", geo->major_ver_id,
-			geo->minor_ver_id, geo->vmnt);
-
-	ret = nvm_core_init(dev);
-	if (ret) {
-		pr_err("could not initialize core structures.\n");
-		goto err;
-	}
-
-	pr_info("registered %s [%u/%u/%u/%u/%u]\n",
-			dev->name, dev->geo.ws_min, dev->geo.ws_opt,
-			dev->geo.num_chk, dev->geo.all_luns,
-			dev->geo.num_ch);
-	return 0;
-err:
-	pr_err("failed to initialize nvm\n");
-	return ret;
-}
-
-struct nvm_dev *nvm_alloc_dev(int node)
-{
-	struct nvm_dev *dev;
-
-	dev = kzalloc_node(sizeof(struct nvm_dev), GFP_KERNEL, node);
-	if (dev)
-		kref_init(&dev->ref);
-
-	return dev;
-}
-EXPORT_SYMBOL(nvm_alloc_dev);
-
-int nvm_register(struct nvm_dev *dev)
-{
-	int ret, exp_pool_size;
-
-	pr_warn_once("lightnvm support is deprecated and will be removed in Linux 5.15.\n");
-
-	if (!dev->q || !dev->ops) {
-		kref_put(&dev->ref, nvm_free);
-		return -EINVAL;
-	}
-
-	ret = nvm_init(dev);
-	if (ret) {
-		kref_put(&dev->ref, nvm_free);
-		return ret;
-	}
-
-	exp_pool_size = max_t(int, PAGE_SIZE,
-			      (NVM_MAX_VLBA * (sizeof(u64) + dev->geo.sos)));
-	exp_pool_size = round_up(exp_pool_size, PAGE_SIZE);
-
-	dev->dma_pool = dev->ops->create_dma_pool(dev, "ppalist",
-						  exp_pool_size);
-	if (!dev->dma_pool) {
-		pr_err("could not create dma pool\n");
-		kref_put(&dev->ref, nvm_free);
-		return -ENOMEM;
-	}
-
-	/* register device with a supported media manager */
-	down_write(&nvm_lock);
-	list_add(&dev->devices, &nvm_devices);
-	up_write(&nvm_lock);
-
-	return 0;
-}
-EXPORT_SYMBOL(nvm_register);
-
-void nvm_unregister(struct nvm_dev *dev)
-{
-	struct nvm_target *t, *tmp;
-
-	mutex_lock(&dev->mlock);
-	list_for_each_entry_safe(t, tmp, &dev->targets, list) {
-		if (t->dev->parent != dev)
-			continue;
-		__nvm_remove_target(t, false);
-		kref_put(&dev->ref, nvm_free);
-	}
-	mutex_unlock(&dev->mlock);
-
-	down_write(&nvm_lock);
-	list_del(&dev->devices);
-	up_write(&nvm_lock);
-
-	kref_put(&dev->ref, nvm_free);
-}
-EXPORT_SYMBOL(nvm_unregister);
-
-static int __nvm_configure_create(struct nvm_ioctl_create *create)
-{
-	struct nvm_dev *dev;
-	int ret;
-
-	down_write(&nvm_lock);
-	dev = nvm_find_nvm_dev(create->dev);
-	up_write(&nvm_lock);
-
-	if (!dev) {
-		pr_err("device not found\n");
-		return -EINVAL;
-	}
-
-	kref_get(&dev->ref);
-	ret = nvm_create_tgt(dev, create);
-	if (ret)
-		kref_put(&dev->ref, nvm_free);
-
-	return ret;
-}
-
-static long nvm_ioctl_info(struct file *file, void __user *arg)
-{
-	struct nvm_ioctl_info *info;
-	struct nvm_tgt_type *tt;
-	int tgt_iter = 0;
-
-	info = memdup_user(arg, sizeof(struct nvm_ioctl_info));
-	if (IS_ERR(info))
-		return PTR_ERR(info);
-
-	info->version[0] = NVM_VERSION_MAJOR;
-	info->version[1] = NVM_VERSION_MINOR;
-	info->version[2] = NVM_VERSION_PATCH;
-
-	down_write(&nvm_tgtt_lock);
-	list_for_each_entry(tt, &nvm_tgt_types, list) {
-		struct nvm_ioctl_info_tgt *tgt = &info->tgts[tgt_iter];
-
-		tgt->version[0] = tt->version[0];
-		tgt->version[1] = tt->version[1];
-		tgt->version[2] = tt->version[2];
-		strncpy(tgt->tgtname, tt->name, NVM_TTYPE_NAME_MAX);
-
-		tgt_iter++;
-	}
-
-	info->tgtsize = tgt_iter;
-	up_write(&nvm_tgtt_lock);
-
-	if (copy_to_user(arg, info, sizeof(struct nvm_ioctl_info))) {
-		kfree(info);
-		return -EFAULT;
-	}
-
-	kfree(info);
-	return 0;
-}
-
-static long nvm_ioctl_get_devices(struct file *file, void __user *arg)
-{
-	struct nvm_ioctl_get_devices *devices;
-	struct nvm_dev *dev;
-	int i = 0;
-
-	devices = kzalloc(sizeof(struct nvm_ioctl_get_devices), GFP_KERNEL);
-	if (!devices)
-		return -ENOMEM;
-
-	down_write(&nvm_lock);
-	list_for_each_entry(dev, &nvm_devices, devices) {
-		struct nvm_ioctl_device_info *info = &devices->info[i];
-
-		strlcpy(info->devname, dev->name, sizeof(info->devname));
-
-		/* kept for compatibility */
-		info->bmversion[0] = 1;
-		info->bmversion[1] = 0;
-		info->bmversion[2] = 0;
-		strlcpy(info->bmname, "gennvm", sizeof(info->bmname));
-		i++;
-
-		if (i >= ARRAY_SIZE(devices->info)) {
-			pr_err("max %zd devices can be reported.\n",
-			       ARRAY_SIZE(devices->info));
-			break;
-		}
-	}
-	up_write(&nvm_lock);
-
-	devices->nr_devices = i;
-
-	if (copy_to_user(arg, devices,
-			 sizeof(struct nvm_ioctl_get_devices))) {
-		kfree(devices);
-		return -EFAULT;
-	}
-
-	kfree(devices);
-	return 0;
-}
-
-static long nvm_ioctl_dev_create(struct file *file, void __user *arg)
-{
-	struct nvm_ioctl_create create;
-
-	if (copy_from_user(&create, arg, sizeof(struct nvm_ioctl_create)))
-		return -EFAULT;
-
-	if (create.conf.type == NVM_CONFIG_TYPE_EXTENDED &&
-	    create.conf.e.rsv != 0) {
-		pr_err("reserved config field in use\n");
-		return -EINVAL;
-	}
-
-	create.dev[DISK_NAME_LEN - 1] = '\0';
-	create.tgttype[NVM_TTYPE_NAME_MAX - 1] = '\0';
-	create.tgtname[DISK_NAME_LEN - 1] = '\0';
-
-	if (create.flags != 0) {
-		__u32 flags = create.flags;
-
-		/* Check for valid flags */
-		if (flags & NVM_TARGET_FACTORY)
-			flags &= ~NVM_TARGET_FACTORY;
-
-		if (flags) {
-			pr_err("flag not supported\n");
-			return -EINVAL;
-		}
-	}
-
-	return __nvm_configure_create(&create);
-}
-
-static long nvm_ioctl_dev_remove(struct file *file, void __user *arg)
-{
-	struct nvm_ioctl_remove remove;
-
-	if (copy_from_user(&remove, arg, sizeof(struct nvm_ioctl_remove)))
-		return -EFAULT;
-
-	remove.tgtname[DISK_NAME_LEN - 1] = '\0';
-
-	if (remove.flags != 0) {
-		pr_err("no flags supported\n");
-		return -EINVAL;
-	}
-
-	return nvm_remove_tgt(&remove);
-}
-
-/* kept for compatibility reasons */
-static long nvm_ioctl_dev_init(struct file *file, void __user *arg)
-{
-	struct nvm_ioctl_dev_init init;
-
-	if (copy_from_user(&init, arg, sizeof(struct nvm_ioctl_dev_init)))
-		return -EFAULT;
-
-	if (init.flags != 0) {
-		pr_err("no flags supported\n");
-		return -EINVAL;
-	}
-
-	return 0;
-}
-
-/* Kept for compatibility reasons */
-static long nvm_ioctl_dev_factory(struct file *file, void __user *arg)
-{
-	struct nvm_ioctl_dev_factory fact;
-
-	if (copy_from_user(&fact, arg, sizeof(struct nvm_ioctl_dev_factory)))
-		return -EFAULT;
-
-	fact.dev[DISK_NAME_LEN - 1] = '\0';
-
-	if (fact.flags & ~(NVM_FACTORY_NR_BITS - 1))
-		return -EINVAL;
-
-	return 0;
-}
-
-static long nvm_ctl_ioctl(struct file *file, uint cmd, unsigned long arg)
-{
-	void __user *argp = (void __user *)arg;
-
-	if (!capable(CAP_SYS_ADMIN))
-		return -EPERM;
-
-	switch (cmd) {
-	case NVM_INFO:
-		return nvm_ioctl_info(file, argp);
-	case NVM_GET_DEVICES:
-		return nvm_ioctl_get_devices(file, argp);
-	case NVM_DEV_CREATE:
-		return nvm_ioctl_dev_create(file, argp);
-	case NVM_DEV_REMOVE:
-		return nvm_ioctl_dev_remove(file, argp);
-	case NVM_DEV_INIT:
-		return nvm_ioctl_dev_init(file, argp);
-	case NVM_DEV_FACTORY:
-		return nvm_ioctl_dev_factory(file, argp);
-	}
-	return 0;
-}
-
-static const struct file_operations _ctl_fops = {
-	.open = nonseekable_open,
-	.unlocked_ioctl = nvm_ctl_ioctl,
-	.owner = THIS_MODULE,
-	.llseek  = noop_llseek,
-};
-
-static struct miscdevice _nvm_misc = {
-	.minor		= MISC_DYNAMIC_MINOR,
-	.name		= "lightnvm",
-	.nodename	= "lightnvm/control",
-	.fops		= &_ctl_fops,
-};
-builtin_misc_device(_nvm_misc);
diff --git a/drivers/lightnvm/pblk-cache.c b/drivers/lightnvm/pblk-cache.c
deleted file mode 100644
index f185f1a00008..000000000000
--- a/drivers/lightnvm/pblk-cache.c
+++ /dev/null
@@ -1,137 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright (C) 2016 CNEX Labs
- * Initial release: Javier Gonzalez <javier@cnexlabs.com>
- *                  Matias Bjorling <matias@cnexlabs.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License version
- * 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * pblk-cache.c - pblk's write cache
- */
-
-#include "pblk.h"
-
-void pblk_write_to_cache(struct pblk *pblk, struct bio *bio,
-				unsigned long flags)
-{
-	struct pblk_w_ctx w_ctx;
-	sector_t lba = pblk_get_lba(bio);
-	unsigned long start_time;
-	unsigned int bpos, pos;
-	int nr_entries = pblk_get_secs(bio);
-	int i, ret;
-
-	start_time = bio_start_io_acct(bio);
-
-	/* Update the write buffer head (mem) with the entries that we can
-	 * write. The write in itself cannot fail, so there is no need to
-	 * rollback from here on.
-	 */
-retry:
-	ret = pblk_rb_may_write_user(&pblk->rwb, bio, nr_entries, &bpos);
-	switch (ret) {
-	case NVM_IO_REQUEUE:
-		io_schedule();
-		goto retry;
-	case NVM_IO_ERR:
-		pblk_pipeline_stop(pblk);
-		bio_io_error(bio);
-		goto out;
-	}
-
-	pblk_ppa_set_empty(&w_ctx.ppa);
-	w_ctx.flags = flags;
-	if (bio->bi_opf & REQ_PREFLUSH) {
-		w_ctx.flags |= PBLK_FLUSH_ENTRY;
-		pblk_write_kick(pblk);
-	}
-
-	if (unlikely(!bio_has_data(bio)))
-		goto out;
-
-	for (i = 0; i < nr_entries; i++) {
-		void *data = bio_data(bio);
-
-		w_ctx.lba = lba + i;
-
-		pos = pblk_rb_wrap_pos(&pblk->rwb, bpos + i);
-		pblk_rb_write_entry_user(&pblk->rwb, data, w_ctx, pos);
-
-		bio_advance(bio, PBLK_EXPOSED_PAGE_SIZE);
-	}
-
-	atomic64_add(nr_entries, &pblk->user_wa);
-
-#ifdef CONFIG_NVM_PBLK_DEBUG
-	atomic_long_add(nr_entries, &pblk->inflight_writes);
-	atomic_long_add(nr_entries, &pblk->req_writes);
-#endif
-
-	pblk_rl_inserted(&pblk->rl, nr_entries);
-
-out:
-	bio_end_io_acct(bio, start_time);
-	pblk_write_should_kick(pblk);
-
-	if (ret == NVM_IO_DONE)
-		bio_endio(bio);
-}
-
-/*
- * On GC the incoming lbas are not necessarily sequential. Also, some of the
- * lbas might not be valid entries, which are marked as empty by the GC thread
- */
-int pblk_write_gc_to_cache(struct pblk *pblk, struct pblk_gc_rq *gc_rq)
-{
-	struct pblk_w_ctx w_ctx;
-	unsigned int bpos, pos;
-	void *data = gc_rq->data;
-	int i, valid_entries;
-
-	/* Update the write buffer head (mem) with the entries that we can
-	 * write. The write in itself cannot fail, so there is no need to
-	 * rollback from here on.
-	 */
-retry:
-	if (!pblk_rb_may_write_gc(&pblk->rwb, gc_rq->secs_to_gc, &bpos)) {
-		io_schedule();
-		goto retry;
-	}
-
-	w_ctx.flags = PBLK_IOTYPE_GC;
-	pblk_ppa_set_empty(&w_ctx.ppa);
-
-	for (i = 0, valid_entries = 0; i < gc_rq->nr_secs; i++) {
-		if (gc_rq->lba_list[i] == ADDR_EMPTY)
-			continue;
-
-		w_ctx.lba = gc_rq->lba_list[i];
-
-		pos = pblk_rb_wrap_pos(&pblk->rwb, bpos + valid_entries);
-		pblk_rb_write_entry_gc(&pblk->rwb, data, w_ctx, gc_rq->line,
-						gc_rq->paddr_list[i], pos);
-
-		data += PBLK_EXPOSED_PAGE_SIZE;
-		valid_entries++;
-	}
-
-	WARN_ONCE(gc_rq->secs_to_gc != valid_entries,
-					"pblk: inconsistent GC write\n");
-
-	atomic64_add(valid_entries, &pblk->gc_wa);
-
-#ifdef CONFIG_NVM_PBLK_DEBUG
-	atomic_long_add(valid_entries, &pblk->inflight_writes);
-	atomic_long_add(valid_entries, &pblk->recov_gc_writes);
-#endif
-
-	pblk_write_should_kick(pblk);
-	return NVM_IO_OK;
-}
diff --git a/drivers/lightnvm/pblk-core.c b/drivers/lightnvm/pblk-core.c
deleted file mode 100644
index 33d39d3dd343..000000000000
--- a/drivers/lightnvm/pblk-core.c
+++ /dev/null
@@ -1,2151 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright (C) 2016 CNEX Labs
- * Initial release: Javier Gonzalez <javier@cnexlabs.com>
- *                  Matias Bjorling <matias@cnexlabs.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License version
- * 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * pblk-core.c - pblk's core functionality
- *
- */
-
-#define CREATE_TRACE_POINTS
-
-#include "pblk.h"
-#include "pblk-trace.h"
-
-static void pblk_line_mark_bb(struct work_struct *work)
-{
-	struct pblk_line_ws *line_ws = container_of(work, struct pblk_line_ws,
-									ws);
-	struct pblk *pblk = line_ws->pblk;
-	struct nvm_tgt_dev *dev = pblk->dev;
-	struct ppa_addr *ppa = line_ws->priv;
-	int ret;
-
-	ret = nvm_set_chunk_meta(dev, ppa, 1, NVM_BLK_T_GRWN_BAD);
-	if (ret) {
-		struct pblk_line *line;
-		int pos;
-
-		line = pblk_ppa_to_line(pblk, *ppa);
-		pos = pblk_ppa_to_pos(&dev->geo, *ppa);
-
-		pblk_err(pblk, "failed to mark bb, line:%d, pos:%d\n",
-				line->id, pos);
-	}
-
-	kfree(ppa);
-	mempool_free(line_ws, &pblk->gen_ws_pool);
-}
-
-static void pblk_mark_bb(struct pblk *pblk, struct pblk_line *line,
-			 struct ppa_addr ppa_addr)
-{
-	struct nvm_tgt_dev *dev = pblk->dev;
-	struct nvm_geo *geo = &dev->geo;
-	struct ppa_addr *ppa;
-	int pos = pblk_ppa_to_pos(geo, ppa_addr);
-
-	pblk_debug(pblk, "erase failed: line:%d, pos:%d\n", line->id, pos);
-	atomic_long_inc(&pblk->erase_failed);
-
-	atomic_dec(&line->blk_in_line);
-	if (test_and_set_bit(pos, line->blk_bitmap))
-		pblk_err(pblk, "attempted to erase bb: line:%d, pos:%d\n",
-							line->id, pos);
-
-	/* Not necessary to mark bad blocks on 2.0 spec. */
-	if (geo->version == NVM_OCSSD_SPEC_20)
-		return;
-
-	ppa = kmalloc(sizeof(struct ppa_addr), GFP_ATOMIC);
-	if (!ppa)
-		return;
-
-	*ppa = ppa_addr;
-	pblk_gen_run_ws(pblk, NULL, ppa, pblk_line_mark_bb,
-						GFP_ATOMIC, pblk->bb_wq);
-}
-
-static void __pblk_end_io_erase(struct pblk *pblk, struct nvm_rq *rqd)
-{
-	struct nvm_tgt_dev *dev = pblk->dev;
-	struct nvm_geo *geo = &dev->geo;
-	struct nvm_chk_meta *chunk;
-	struct pblk_line *line;
-	int pos;
-
-	line = pblk_ppa_to_line(pblk, rqd->ppa_addr);
-	pos = pblk_ppa_to_pos(geo, rqd->ppa_addr);
-	chunk = &line->chks[pos];
-
-	atomic_dec(&line->left_seblks);
-
-	if (rqd->error) {
-		trace_pblk_chunk_reset(pblk_disk_name(pblk),
-				&rqd->ppa_addr, PBLK_CHUNK_RESET_FAILED);
-
-		chunk->state = NVM_CHK_ST_OFFLINE;
-		pblk_mark_bb(pblk, line, rqd->ppa_addr);
-	} else {
-		trace_pblk_chunk_reset(pblk_disk_name(pblk),
-				&rqd->ppa_addr, PBLK_CHUNK_RESET_DONE);
-
-		chunk->state = NVM_CHK_ST_FREE;
-	}
-
-	trace_pblk_chunk_state(pblk_disk_name(pblk), &rqd->ppa_addr,
-				chunk->state);
-
-	atomic_dec(&pblk->inflight_io);
-}
-
-/* Erase completion assumes that only one block is erased at the time */
-static void pblk_end_io_erase(struct nvm_rq *rqd)
-{
-	struct pblk *pblk = rqd->private;
-
-	__pblk_end_io_erase(pblk, rqd);
-	mempool_free(rqd, &pblk->e_rq_pool);
-}
-
-/*
- * Get information for all chunks from the device.
- *
- * The caller is responsible for freeing (vmalloc) the returned structure
- */
-struct nvm_chk_meta *pblk_get_chunk_meta(struct pblk *pblk)
-{
-	struct nvm_tgt_dev *dev = pblk->dev;
-	struct nvm_geo *geo = &dev->geo;
-	struct nvm_chk_meta *meta;
-	struct ppa_addr ppa;
-	unsigned long len;
-	int ret;
-
-	ppa.ppa = 0;
-
-	len = geo->all_chunks * sizeof(*meta);
-	meta = vzalloc(len);
-	if (!meta)
-		return ERR_PTR(-ENOMEM);
-
-	ret = nvm_get_chunk_meta(dev, ppa, geo->all_chunks, meta);
-	if (ret) {
-		vfree(meta);
-		return ERR_PTR(-EIO);
-	}
-
-	return meta;
-}
-
-struct nvm_chk_meta *pblk_chunk_get_off(struct pblk *pblk,
-					      struct nvm_chk_meta *meta,
-					      struct ppa_addr ppa)
-{
-	struct nvm_tgt_dev *dev = pblk->dev;
-	struct nvm_geo *geo = &dev->geo;
-	int ch_off = ppa.m.grp * geo->num_chk * geo->num_lun;
-	int lun_off = ppa.m.pu * geo->num_chk;
-	int chk_off = ppa.m.chk;
-
-	return meta + ch_off + lun_off + chk_off;
-}
-
-void __pblk_map_invalidate(struct pblk *pblk, struct pblk_line *line,
-			   u64 paddr)
-{
-	struct pblk_line_mgmt *l_mg = &pblk->l_mg;
-	struct list_head *move_list = NULL;
-
-	/* Lines being reclaimed (GC'ed) cannot be invalidated. Before the L2P
-	 * table is modified with reclaimed sectors, a check is done to endure
-	 * that newer updates are not overwritten.
-	 */
-	spin_lock(&line->lock);
-	WARN_ON(line->state == PBLK_LINESTATE_FREE);
-
-	if (test_and_set_bit(paddr, line->invalid_bitmap)) {
-		WARN_ONCE(1, "pblk: double invalidate\n");
-		spin_unlock(&line->lock);
-		return;
-	}
-	le32_add_cpu(line->vsc, -1);
-
-	if (line->state == PBLK_LINESTATE_CLOSED)
-		move_list = pblk_line_gc_list(pblk, line);
-	spin_unlock(&line->lock);
-
-	if (move_list) {
-		spin_lock(&l_mg->gc_lock);
-		spin_lock(&line->lock);
-		/* Prevent moving a line that has just been chosen for GC */
-		if (line->state == PBLK_LINESTATE_GC) {
-			spin_unlock(&line->lock);
-			spin_unlock(&l_mg->gc_lock);
-			return;
-		}
-		spin_unlock(&line->lock);
-
-		list_move_tail(&line->list, move_list);
-		spin_unlock(&l_mg->gc_lock);
-	}
-}
-
-void pblk_map_invalidate(struct pblk *pblk, struct ppa_addr ppa)
-{
-	struct pblk_line *line;
-	u64 paddr;
-
-#ifdef CONFIG_NVM_PBLK_DEBUG
-	/* Callers must ensure that the ppa points to a device address */
-	BUG_ON(pblk_addr_in_cache(ppa));
-	BUG_ON(pblk_ppa_empty(ppa));
-#endif
-
-	line = pblk_ppa_to_line(pblk, ppa);
-	paddr = pblk_dev_ppa_to_line_addr(pblk, ppa);
-
-	__pblk_map_invalidate(pblk, line, paddr);
-}
-
-static void pblk_invalidate_range(struct pblk *pblk, sector_t slba,
-				  unsigned int nr_secs)
-{
-	sector_t lba;
-
-	spin_lock(&pblk->trans_lock);
-	for (lba = slba; lba < slba + nr_secs; lba++) {
-		struct ppa_addr ppa;
-
-		ppa = pblk_trans_map_get(pblk, lba);
-
-		if (!pblk_addr_in_cache(ppa) && !pblk_ppa_empty(ppa))
-			pblk_map_invalidate(pblk, ppa);
-
-		pblk_ppa_set_empty(&ppa);
-		pblk_trans_map_set(pblk, lba, ppa);
-	}
-	spin_unlock(&pblk->trans_lock);
-}
-
-int pblk_alloc_rqd_meta(struct pblk *pblk, struct nvm_rq *rqd)
-{
-	struct nvm_tgt_dev *dev = pblk->dev;
-
-	rqd->meta_list = nvm_dev_dma_alloc(dev->parent, GFP_KERNEL,
-							&rqd->dma_meta_list);
-	if (!rqd->meta_list)
-		return -ENOMEM;
-
-	if (rqd->nr_ppas == 1)
-		return 0;
-
-	rqd->ppa_list = rqd->meta_list + pblk_dma_meta_size(pblk);
-	rqd->dma_ppa_list = rqd->dma_meta_list + pblk_dma_meta_size(pblk);
-
-	return 0;
-}
-
-void pblk_free_rqd_meta(struct pblk *pblk, struct nvm_rq *rqd)
-{
-	struct nvm_tgt_dev *dev = pblk->dev;
-
-	if (rqd->meta_list)
-		nvm_dev_dma_free(dev->parent, rqd->meta_list,
-				rqd->dma_meta_list);
-}
-
-/* Caller must guarantee that the request is a valid type */
-struct nvm_rq *pblk_alloc_rqd(struct pblk *pblk, int type)
-{
-	mempool_t *pool;
-	struct nvm_rq *rqd;
-	int rq_size;
-
-	switch (type) {
-	case PBLK_WRITE:
-	case PBLK_WRITE_INT:
-		pool = &pblk->w_rq_pool;
-		rq_size = pblk_w_rq_size;
-		break;
-	case PBLK_READ:
-		pool = &pblk->r_rq_pool;
-		rq_size = pblk_g_rq_size;
-		break;
-	default:
-		pool = &pblk->e_rq_pool;
-		rq_size = pblk_g_rq_size;
-	}
-
-	rqd = mempool_alloc(pool, GFP_KERNEL);
-	memset(rqd, 0, rq_size);
-
-	return rqd;
-}
-
-/* Typically used on completion path. Cannot guarantee request consistency */
-void pblk_free_rqd(struct pblk *pblk, struct nvm_rq *rqd, int type)
-{
-	mempool_t *pool;
-
-	switch (type) {
-	case PBLK_WRITE:
-		kfree(((struct pblk_c_ctx *)nvm_rq_to_pdu(rqd))->lun_bitmap);
-		fallthrough;
-	case PBLK_WRITE_INT:
-		pool = &pblk->w_rq_pool;
-		break;
-	case PBLK_READ:
-		pool = &pblk->r_rq_pool;
-		break;
-	case PBLK_ERASE:
-		pool = &pblk->e_rq_pool;
-		break;
-	default:
-		pblk_err(pblk, "trying to free unknown rqd type\n");
-		return;
-	}
-
-	pblk_free_rqd_meta(pblk, rqd);
-	mempool_free(rqd, pool);
-}
-
-void pblk_bio_free_pages(struct pblk *pblk, struct bio *bio, int off,
-			 int nr_pages)
-{
-	struct bio_vec *bv;
-	struct page *page;
-	int i, e, nbv = 0;
-
-	for (i = 0; i < bio->bi_vcnt; i++) {
-		bv = &bio->bi_io_vec[i];
-		page = bv->bv_page;
-		for (e = 0; e < bv->bv_len; e += PBLK_EXPOSED_PAGE_SIZE, nbv++)
-			if (nbv >= off)
-				mempool_free(page++, &pblk->page_bio_pool);
-	}
-}
-
-int pblk_bio_add_pages(struct pblk *pblk, struct bio *bio, gfp_t flags,
-		       int nr_pages)
-{
-	struct request_queue *q = pblk->dev->q;
-	struct page *page;
-	int i, ret;
-
-	for (i = 0; i < nr_pages; i++) {
-		page = mempool_alloc(&pblk->page_bio_pool, flags);
-
-		ret = bio_add_pc_page(q, bio, page, PBLK_EXPOSED_PAGE_SIZE, 0);
-		if (ret != PBLK_EXPOSED_PAGE_SIZE) {
-			pblk_err(pblk, "could not add page to bio\n");
-			mempool_free(page, &pblk->page_bio_pool);
-			goto err;
-		}
-	}
-
-	return 0;
-err:
-	pblk_bio_free_pages(pblk, bio, (bio->bi_vcnt - i), i);
-	return -1;
-}
-
-void pblk_write_kick(struct pblk *pblk)
-{
-	wake_up_process(pblk->writer_ts);
-	mod_timer(&pblk->wtimer, jiffies + msecs_to_jiffies(1000));
-}
-
-void pblk_write_timer_fn(struct timer_list *t)
-{
-	struct pblk *pblk = from_timer(pblk, t, wtimer);
-
-	/* kick the write thread every tick to flush outstanding data */
-	pblk_write_kick(pblk);
-}
-
-void pblk_write_should_kick(struct pblk *pblk)
-{
-	unsigned int secs_avail = pblk_rb_read_count(&pblk->rwb);
-
-	if (secs_avail >= pblk->min_write_pgs_data)
-		pblk_write_kick(pblk);
-}
-
-static void pblk_wait_for_meta(struct pblk *pblk)
-{
-	do {
-		if (!atomic_read(&pblk->inflight_io))
-			break;
-
-		schedule();
-	} while (1);
-}
-
-static void pblk_flush_writer(struct pblk *pblk)
-{
-	pblk_rb_flush(&pblk->rwb);
-	do {
-		if (!pblk_rb_sync_count(&pblk->rwb))
-			break;
-
-		pblk_write_kick(pblk);
-		schedule();
-	} while (1);
-}
-
-struct list_head *pblk_line_gc_list(struct pblk *pblk, struct pblk_line *line)
-{
-	struct pblk_line_meta *lm = &pblk->lm;
-	struct pblk_line_mgmt *l_mg = &pblk->l_mg;
-	struct list_head *move_list = NULL;
-	int packed_meta = (le32_to_cpu(*line->vsc) / pblk->min_write_pgs_data)
-			* (pblk->min_write_pgs - pblk->min_write_pgs_data);
-	int vsc = le32_to_cpu(*line->vsc) + packed_meta;
-
-	lockdep_assert_held(&line->lock);
-
-	if (line->w_err_gc->has_write_err) {
-		if (line->gc_group != PBLK_LINEGC_WERR) {
-			line->gc_group = PBLK_LINEGC_WERR;
-			move_list = &l_mg->gc_werr_list;
-			pblk_rl_werr_line_in(&pblk->rl);
-		}
-	} else if (!vsc) {
-		if (line->gc_group != PBLK_LINEGC_FULL) {
-			line->gc_group = PBLK_LINEGC_FULL;
-			move_list = &l_mg->gc_full_list;
-		}
-	} else if (vsc < lm->high_thrs) {
-		if (line->gc_group != PBLK_LINEGC_HIGH) {
-			line->gc_group = PBLK_LINEGC_HIGH;
-			move_list = &l_mg->gc_high_list;
-		}
-	} else if (vsc < lm->mid_thrs) {
-		if (line->gc_group != PBLK_LINEGC_MID) {
-			line->gc_group = PBLK_LINEGC_MID;
-			move_list = &l_mg->gc_mid_list;
-		}
-	} else if (vsc < line->sec_in_line) {
-		if (line->gc_group != PBLK_LINEGC_LOW) {
-			line->gc_group = PBLK_LINEGC_LOW;
-			move_list = &l_mg->gc_low_list;
-		}
-	} else if (vsc == line->sec_in_line) {
-		if (line->gc_group != PBLK_LINEGC_EMPTY) {
-			line->gc_group = PBLK_LINEGC_EMPTY;
-			move_list = &l_mg->gc_empty_list;
-		}
-	} else {
-		line->state = PBLK_LINESTATE_CORRUPT;
-		trace_pblk_line_state(pblk_disk_name(pblk), line->id,
-					line->state);
-
-		line->gc_group = PBLK_LINEGC_NONE;
-		move_list =  &l_mg->corrupt_list;
-		pblk_err(pblk, "corrupted vsc for line %d, vsc:%d (%d/%d/%d)\n",
-						line->id, vsc,
-						line->sec_in_line,
-						lm->high_thrs, lm->mid_thrs);
-	}
-
-	return move_list;
-}
-
-void pblk_discard(struct pblk *pblk, struct bio *bio)
-{
-	sector_t slba = pblk_get_lba(bio);
-	sector_t nr_secs = pblk_get_secs(bio);
-
-	pblk_invalidate_range(pblk, slba, nr_secs);
-}
-
-void pblk_log_write_err(struct pblk *pblk, struct nvm_rq *rqd)
-{
-	atomic_long_inc(&pblk->write_failed);
-#ifdef CONFIG_NVM_PBLK_DEBUG
-	pblk_print_failed_rqd(pblk, rqd, rqd->error);
-#endif
-}
-
-void pblk_log_read_err(struct pblk *pblk, struct nvm_rq *rqd)
-{
-	/* Empty page read is not necessarily an error (e.g., L2P recovery) */
-	if (rqd->error == NVM_RSP_ERR_EMPTYPAGE) {
-		atomic_long_inc(&pblk->read_empty);
-		return;
-	}
-
-	switch (rqd->error) {
-	case NVM_RSP_WARN_HIGHECC:
-		atomic_long_inc(&pblk->read_high_ecc);
-		break;
-	case NVM_RSP_ERR_FAILECC:
-	case NVM_RSP_ERR_FAILCRC:
-		atomic_long_inc(&pblk->read_failed);
-		break;
-	default:
-		pblk_err(pblk, "unknown read error:%d\n", rqd->error);
-	}
-#ifdef CONFIG_NVM_PBLK_DEBUG
-	pblk_print_failed_rqd(pblk, rqd, rqd->error);
-#endif
-}
-
-void pblk_set_sec_per_write(struct pblk *pblk, int sec_per_write)
-{
-	pblk->sec_per_write = sec_per_write;
-}
-
-int pblk_submit_io(struct pblk *pblk, struct nvm_rq *rqd, void *buf)
-{
-	struct nvm_tgt_dev *dev = pblk->dev;
-
-	atomic_inc(&pblk->inflight_io);
-
-#ifdef CONFIG_NVM_PBLK_DEBUG
-	if (pblk_check_io(pblk, rqd))
-		return NVM_IO_ERR;
-#endif
-
-	return nvm_submit_io(dev, rqd, buf);
-}
-
-void pblk_check_chunk_state_update(struct pblk *pblk, struct nvm_rq *rqd)
-{
-	struct ppa_addr *ppa_list = nvm_rq_to_ppa_list(rqd);
-
-	int i;
-
-	for (i = 0; i < rqd->nr_ppas; i++) {
-		struct ppa_addr *ppa = &ppa_list[i];
-		struct nvm_chk_meta *chunk = pblk_dev_ppa_to_chunk(pblk, *ppa);
-		u64 caddr = pblk_dev_ppa_to_chunk_addr(pblk, *ppa);
-
-		if (caddr == 0)
-			trace_pblk_chunk_state(pblk_disk_name(pblk),
-							ppa, NVM_CHK_ST_OPEN);
-		else if (caddr == (chunk->cnlb - 1))
-			trace_pblk_chunk_state(pblk_disk_name(pblk),
-							ppa, NVM_CHK_ST_CLOSED);
-	}
-}
-
-int pblk_submit_io_sync(struct pblk *pblk, struct nvm_rq *rqd, void *buf)
-{
-	struct nvm_tgt_dev *dev = pblk->dev;
-	int ret;
-
-	atomic_inc(&pblk->inflight_io);
-
-#ifdef CONFIG_NVM_PBLK_DEBUG
-	if (pblk_check_io(pblk, rqd))
-		return NVM_IO_ERR;
-#endif
-
-	ret = nvm_submit_io_sync(dev, rqd, buf);
-
-	if (trace_pblk_chunk_state_enabled() && !ret &&
-	    rqd->opcode == NVM_OP_PWRITE)
-		pblk_check_chunk_state_update(pblk, rqd);
-
-	return ret;
-}
-
-static int pblk_submit_io_sync_sem(struct pblk *pblk, struct nvm_rq *rqd,
-				   void *buf)
-{
-	struct ppa_addr *ppa_list = nvm_rq_to_ppa_list(rqd);
-	int ret;
-
-	pblk_down_chunk(pblk, ppa_list[0]);
-	ret = pblk_submit_io_sync(pblk, rqd, buf);
-	pblk_up_chunk(pblk, ppa_list[0]);
-
-	return ret;
-}
-
-int pblk_calc_secs(struct pblk *pblk, unsigned long secs_avail,
-		   unsigned long secs_to_flush, bool skip_meta)
-{
-	int max = pblk->sec_per_write;
-	int min = pblk->min_write_pgs;
-	int secs_to_sync = 0;
-
-	if (skip_meta && pblk->min_write_pgs_data != pblk->min_write_pgs)
-		min = max = pblk->min_write_pgs_data;
-
-	if (secs_avail >= max)
-		secs_to_sync = max;
-	else if (secs_avail >= min)
-		secs_to_sync = min * (secs_avail / min);
-	else if (secs_to_flush)
-		secs_to_sync = min;
-
-	return secs_to_sync;
-}
-
-void pblk_dealloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs)
-{
-	u64 addr;
-	int i;
-
-	spin_lock(&line->lock);
-	addr = find_next_zero_bit(line->map_bitmap,
-					pblk->lm.sec_per_line, line->cur_sec);
-	line->cur_sec = addr - nr_secs;
-
-	for (i = 0; i < nr_secs; i++, line->cur_sec--)
-		WARN_ON(!test_and_clear_bit(line->cur_sec, line->map_bitmap));
-	spin_unlock(&line->lock);
-}
-
-u64 __pblk_alloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs)
-{
-	u64 addr;
-	int i;
-
-	lockdep_assert_held(&line->lock);
-
-	/* logic error: ppa out-of-bounds. Prevent generating bad address */
-	if (line->cur_sec + nr_secs > pblk->lm.sec_per_line) {
-		WARN(1, "pblk: page allocation out of bounds\n");
-		nr_secs = pblk->lm.sec_per_line - line->cur_sec;
-	}
-
-	line->cur_sec = addr = find_next_zero_bit(line->map_bitmap,
-					pblk->lm.sec_per_line, line->cur_sec);
-	for (i = 0; i < nr_secs; i++, line->cur_sec++)
-		WARN_ON(test_and_set_bit(line->cur_sec, line->map_bitmap));
-
-	return addr;
-}
-
-u64 pblk_alloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs)
-{
-	u64 addr;
-
-	/* Lock needed in case a write fails and a recovery needs to remap
-	 * failed write buffer entries
-	 */
-	spin_lock(&line->lock);
-	addr = __pblk_alloc_page(pblk, line, nr_secs);
-	line->left_msecs -= nr_secs;
-	WARN(line->left_msecs < 0, "pblk: page allocation out of bounds\n");
-	spin_unlock(&line->lock);
-
-	return addr;
-}
-
-u64 pblk_lookup_page(struct pblk *pblk, struct pblk_line *line)
-{
-	u64 paddr;
-
-	spin_lock(&line->lock);
-	paddr = find_next_zero_bit(line->map_bitmap,
-					pblk->lm.sec_per_line, line->cur_sec);
-	spin_unlock(&line->lock);
-
-	return paddr;
-}
-
-u64 pblk_line_smeta_start(struct pblk *pblk, struct pblk_line *line)
-{
-	struct nvm_tgt_dev *dev = pblk->dev;
-	struct nvm_geo *geo = &dev->geo;
-	struct pblk_line_meta *lm = &pblk->lm;
-	int bit;
-
-	/* This usually only happens on bad lines */
-	bit = find_first_zero_bit(line->blk_bitmap, lm->blk_per_line);
-	if (bit >= lm->blk_per_line)
-		return -1;
-
-	return bit * geo->ws_opt;
-}
-
-int pblk_line_smeta_read(struct pblk *pblk, struct pblk_line *line)
-{
-	struct pblk_line_meta *lm = &pblk->lm;
-	struct ppa_addr *ppa_list;
-	struct nvm_rq rqd;
-	u64 paddr = pblk_line_smeta_start(pblk, line);
-	int i, ret;
-
-	memset(&rqd, 0, sizeof(struct nvm_rq));
-
-	ret = pblk_alloc_rqd_meta(pblk, &rqd);
-	if (ret)
-		return ret;
-
-	rqd.opcode = NVM_OP_PREAD;
-	rqd.nr_ppas = lm->smeta_sec;
-	rqd.is_seq = 1;
-	ppa_list = nvm_rq_to_ppa_list(&rqd);
-
-	for (i = 0; i < lm->smeta_sec; i++, paddr++)
-		ppa_list[i] = addr_to_gen_ppa(pblk, paddr, line->id);
-
-	ret = pblk_submit_io_sync(pblk, &rqd, line->smeta);
-	if (ret) {
-		pblk_err(pblk, "smeta I/O submission failed: %d\n", ret);
-		goto clear_rqd;
-	}
-
-	atomic_dec(&pblk->inflight_io);
-
-	if (rqd.error && rqd.error != NVM_RSP_WARN_HIGHECC) {
-		pblk_log_read_err(pblk, &rqd);
-		ret = -EIO;
-	}
-
-clear_rqd:
-	pblk_free_rqd_meta(pblk, &rqd);
-	return ret;
-}
-
-static int pblk_line_smeta_write(struct pblk *pblk, struct pblk_line *line,
-				 u64 paddr)
-{
-	struct pblk_line_meta *lm = &pblk->lm;
-	struct ppa_addr *ppa_list;
-	struct nvm_rq rqd;
-	__le64 *lba_list = emeta_to_lbas(pblk, line->emeta->buf);
-	__le64 addr_empty = cpu_to_le64(ADDR_EMPTY);
-	int i, ret;
-
-	memset(&rqd, 0, sizeof(struct nvm_rq));
-
-	ret = pblk_alloc_rqd_meta(pblk, &rqd);
-	if (ret)
-		return ret;
-
-	rqd.opcode = NVM_OP_PWRITE;
-	rqd.nr_ppas = lm->smeta_sec;
-	rqd.is_seq = 1;
-	ppa_list = nvm_rq_to_ppa_list(&rqd);
-
-	for (i = 0; i < lm->smeta_sec; i++, paddr++) {
-		struct pblk_sec_meta *meta = pblk_get_meta(pblk,
-							   rqd.meta_list, i);
-
-		ppa_list[i] = addr_to_gen_ppa(pblk, paddr, line->id);
-		meta->lba = lba_list[paddr] = addr_empty;
-	}
-
-	ret = pblk_submit_io_sync_sem(pblk, &rqd, line->smeta);
-	if (ret) {
-		pblk_err(pblk, "smeta I/O submission failed: %d\n", ret);
-		goto clear_rqd;
-	}
-
-	atomic_dec(&pblk->inflight_io);
-
-	if (rqd.error) {
-		pblk_log_write_err(pblk, &rqd);
-		ret = -EIO;
-	}
-
-clear_rqd:
-	pblk_free_rqd_meta(pblk, &rqd);
-	return ret;
-}
-
-int pblk_line_emeta_read(struct pblk *pblk, struct pblk_line *line,
-			 void *emeta_buf)
-{
-	struct nvm_tgt_dev *dev = pblk->dev;
-	struct nvm_geo *geo = &dev->geo;
-	struct pblk_line_meta *lm = &pblk->lm;
-	void *ppa_list_buf, *meta_list;
-	struct ppa_addr *ppa_list;
-	struct nvm_rq rqd;
-	u64 paddr = line->emeta_ssec;
-	dma_addr_t dma_ppa_list, dma_meta_list;
-	int min = pblk->min_write_pgs;
-	int left_ppas = lm->emeta_sec[0];
-	int line_id = line->id;
-	int rq_ppas, rq_len;
-	int i, j;
-	int ret;
-
-	meta_list = nvm_dev_dma_alloc(dev->parent, GFP_KERNEL,
-							&dma_meta_list);
-	if (!meta_list)
-		return -ENOMEM;
-
-	ppa_list_buf = meta_list + pblk_dma_meta_size(pblk);
-	dma_ppa_list = dma_meta_list + pblk_dma_meta_size(pblk);
-
-next_rq:
-	memset(&rqd, 0, sizeof(struct nvm_rq));
-
-	rq_ppas = pblk_calc_secs(pblk, left_ppas, 0, false);
-	rq_len = rq_ppas * geo->csecs;
-
-	rqd.meta_list = meta_list;
-	rqd.ppa_list = ppa_list_buf;
-	rqd.dma_meta_list = dma_meta_list;
-	rqd.dma_ppa_list = dma_ppa_list;
-	rqd.opcode = NVM_OP_PREAD;
-	rqd.nr_ppas = rq_ppas;
-	ppa_list = nvm_rq_to_ppa_list(&rqd);
-
-	for (i = 0; i < rqd.nr_ppas; ) {
-		struct ppa_addr ppa = addr_to_gen_ppa(pblk, paddr, line_id);
-		int pos = pblk_ppa_to_pos(geo, ppa);
-
-		if (pblk_io_aligned(pblk, rq_ppas))
-			rqd.is_seq = 1;
-
-		while (test_bit(pos, line->blk_bitmap)) {
-			paddr += min;
-			if (pblk_boundary_paddr_checks(pblk, paddr)) {
-				ret = -EINTR;
-				goto free_rqd_dma;
-			}
-
-			ppa = addr_to_gen_ppa(pblk, paddr, line_id);
-			pos = pblk_ppa_to_pos(geo, ppa);
-		}
-
-		if (pblk_boundary_paddr_checks(pblk, paddr + min)) {
-			ret = -EINTR;
-			goto free_rqd_dma;
-		}
-
-		for (j = 0; j < min; j++, i++, paddr++)
-			ppa_list[i] = addr_to_gen_ppa(pblk, paddr, line_id);
-	}
-
-	ret = pblk_submit_io_sync(pblk, &rqd, emeta_buf);
-	if (ret) {
-		pblk_err(pblk, "emeta I/O submission failed: %d\n", ret);
-		goto free_rqd_dma;
-	}
-
-	atomic_dec(&pblk->inflight_io);
-
-	if (rqd.error && rqd.error != NVM_RSP_WARN_HIGHECC) {
-		pblk_log_read_err(pblk, &rqd);
-		ret = -EIO;
-		goto free_rqd_dma;
-	}
-
-	emeta_buf += rq_len;
-	left_ppas -= rq_ppas;
-	if (left_ppas)
-		goto next_rq;
-
-free_rqd_dma:
-	nvm_dev_dma_free(dev->parent, rqd.meta_list, rqd.dma_meta_list);
-	return ret;
-}
-
-static void pblk_setup_e_rq(struct pblk *pblk, struct nvm_rq *rqd,
-			    struct ppa_addr ppa)
-{
-	rqd->opcode = NVM_OP_ERASE;
-	rqd->ppa_addr = ppa;
-	rqd->nr_ppas = 1;
-	rqd->is_seq = 1;
-	rqd->bio = NULL;
-}
-
-static int pblk_blk_erase_sync(struct pblk *pblk, struct ppa_addr ppa)
-{
-	struct nvm_rq rqd = {NULL};
-	int ret;
-
-	trace_pblk_chunk_reset(pblk_disk_name(pblk), &ppa,
-				PBLK_CHUNK_RESET_START);
-
-	pblk_setup_e_rq(pblk, &rqd, ppa);
-
-	/* The write thread schedules erases so that it minimizes disturbances
-	 * with writes. Thus, there is no need to take the LUN semaphore.
-	 */
-	ret = pblk_submit_io_sync(pblk, &rqd, NULL);
-	rqd.private = pblk;
-	__pblk_end_io_erase(pblk, &rqd);
-
-	return ret;
-}
-
-int pblk_line_erase(struct pblk *pblk, struct pblk_line *line)
-{
-	struct pblk_line_meta *lm = &pblk->lm;
-	struct ppa_addr ppa;
-	int ret, bit = -1;
-
-	/* Erase only good blocks, one at a time */
-	do {
-		spin_lock(&line->lock);
-		bit = find_next_zero_bit(line->erase_bitmap, lm->blk_per_line,
-								bit + 1);
-		if (bit >= lm->blk_per_line) {
-			spin_unlock(&line->lock);
-			break;
-		}
-
-		ppa = pblk->luns[bit].bppa; /* set ch and lun */
-		ppa.a.blk = line->id;
-
-		atomic_dec(&line->left_eblks);
-		WARN_ON(test_and_set_bit(bit, line->erase_bitmap));
-		spin_unlock(&line->lock);
-
-		ret = pblk_blk_erase_sync(pblk, ppa);
-		if (ret) {
-			pblk_err(pblk, "failed to erase line %d\n", line->id);
-			return ret;
-		}
-	} while (1);
-
-	return 0;
-}
-
-static void pblk_line_setup_metadata(struct pblk_line *line,
-				     struct pblk_line_mgmt *l_mg,
-				     struct pblk_line_meta *lm)
-{
-	int meta_line;
-
-	lockdep_assert_held(&l_mg->free_lock);
-
-retry_meta:
-	meta_line = find_first_zero_bit(&l_mg->meta_bitmap, PBLK_DATA_LINES);
-	if (meta_line == PBLK_DATA_LINES) {
-		spin_unlock(&l_mg->free_lock);
-		io_schedule();
-		spin_lock(&l_mg->free_lock);
-		goto retry_meta;
-	}
-
-	set_bit(meta_line, &l_mg->meta_bitmap);
-	line->meta_line = meta_line;
-
-	line->smeta = l_mg->sline_meta[meta_line];
-	line->emeta = l_mg->eline_meta[meta_line];
-
-	memset(line->smeta, 0, lm->smeta_len);
-	memset(line->emeta->buf, 0, lm->emeta_len[0]);
-
-	line->emeta->mem = 0;
-	atomic_set(&line->emeta->sync, 0);
-}
-
-/* For now lines are always assumed full lines. Thus, smeta former and current
- * lun bitmaps are omitted.
- */
-static int pblk_line_init_metadata(struct pblk *pblk, struct pblk_line *line,
-				  struct pblk_line *cur)
-{
-	struct nvm_tgt_dev *dev = pblk->dev;
-	struct nvm_geo *geo = &dev->geo;
-	struct pblk_line_meta *lm = &pblk->lm;
-	struct pblk_line_mgmt *l_mg = &pblk->l_mg;
-	struct pblk_emeta *emeta = line->emeta;
-	struct line_emeta *emeta_buf = emeta->buf;
-	struct line_smeta *smeta_buf = (struct line_smeta *)line->smeta;
-	int nr_blk_line;
-
-	/* After erasing the line, new bad blocks might appear and we risk
-	 * having an invalid line
-	 */
-	nr_blk_line = lm->blk_per_line -
-			bitmap_weight(line->blk_bitmap, lm->blk_per_line);
-	if (nr_blk_line < lm->min_blk_line) {
-		spin_lock(&l_mg->free_lock);
-		spin_lock(&line->lock);
-		line->state = PBLK_LINESTATE_BAD;
-		trace_pblk_line_state(pblk_disk_name(pblk), line->id,
-					line->state);
-		spin_unlock(&line->lock);
-
-		list_add_tail(&line->list, &l_mg->bad_list);
-		spin_unlock(&l_mg->free_lock);
-
-		pblk_debug(pblk, "line %d is bad\n", line->id);
-
-		return 0;
-	}
-
-	/* Run-time metadata */
-	line->lun_bitmap = ((void *)(smeta_buf)) + sizeof(struct line_smeta);
-
-	/* Mark LUNs allocated in this line (all for now) */
-	bitmap_set(line->lun_bitmap, 0, lm->lun_bitmap_len);
-
-	smeta_buf->header.identifier = cpu_to_le32(PBLK_MAGIC);
-	export_guid(smeta_buf->header.uuid, &pblk->instance_uuid);
-	smeta_buf->header.id = cpu_to_le32(line->id);
-	smeta_buf->header.type = cpu_to_le16(line->type);
-	smeta_buf->header.version_major = SMETA_VERSION_MAJOR;
-	smeta_buf->header.version_minor = SMETA_VERSION_MINOR;
-
-	/* Start metadata */
-	smeta_buf->seq_nr = cpu_to_le64(line->seq_nr);
-	smeta_buf->window_wr_lun = cpu_to_le32(geo->all_luns);
-
-	/* Fill metadata among lines */
-	if (cur) {
-		memcpy(line->lun_bitmap, cur->lun_bitmap, lm->lun_bitmap_len);
-		smeta_buf->prev_id = cpu_to_le32(cur->id);
-		cur->emeta->buf->next_id = cpu_to_le32(line->id);
-	} else {
-		smeta_buf->prev_id = cpu_to_le32(PBLK_LINE_EMPTY);
-	}
-
-	/* All smeta must be set at this point */
-	smeta_buf->header.crc = cpu_to_le32(
-			pblk_calc_meta_header_crc(pblk, &smeta_buf->header));
-	smeta_buf->crc = cpu_to_le32(pblk_calc_smeta_crc(pblk, smeta_buf));
-
-	/* End metadata */
-	memcpy(&emeta_buf->header, &smeta_buf->header,
-						sizeof(struct line_header));
-
-	emeta_buf->header.version_major = EMETA_VERSION_MAJOR;
-	emeta_buf->header.version_minor = EMETA_VERSION_MINOR;
-	emeta_buf->header.crc = cpu_to_le32(
-			pblk_calc_meta_header_crc(pblk, &emeta_buf->header));
-
-	emeta_buf->seq_nr = cpu_to_le64(line->seq_nr);
-	emeta_buf->nr_lbas = cpu_to_le64(line->sec_in_line);
-	emeta_buf->nr_valid_lbas = cpu_to_le64(0);
-	emeta_buf->next_id = cpu_to_le32(PBLK_LINE_EMPTY);
-	emeta_buf->crc = cpu_to_le32(0);
-	emeta_buf->prev_id = smeta_buf->prev_id;
-
-	return 1;
-}
-
-static int pblk_line_alloc_bitmaps(struct pblk *pblk, struct pblk_line *line)
-{
-	struct pblk_line_meta *lm = &pblk->lm;
-	struct pblk_line_mgmt *l_mg = &pblk->l_mg;
-
-	line->map_bitmap = mempool_alloc(l_mg->bitmap_pool, GFP_KERNEL);
-	if (!line->map_bitmap)
-		return -ENOMEM;
-
-	memset(line->map_bitmap, 0, lm->sec_bitmap_len);
-
-	/* will be initialized using bb info from map_bitmap */
-	line->invalid_bitmap = mempool_alloc(l_mg->bitmap_pool, GFP_KERNEL);
-	if (!line->invalid_bitmap) {
-		mempool_free(line->map_bitmap, l_mg->bitmap_pool);
-		line->map_bitmap = NULL;
-		return -ENOMEM;
-	}
-
-	return 0;
-}
-
-/* For now lines are always assumed full lines. Thus, smeta former and current
- * lun bitmaps are omitted.
- */
-static int pblk_line_init_bb(struct pblk *pblk, struct pblk_line *line,
-			     int init)
-{
-	struct nvm_tgt_dev *dev = pblk->dev;
-	struct nvm_geo *geo = &dev->geo;
-	struct pblk_line_meta *lm = &pblk->lm;
-	struct pblk_line_mgmt *l_mg = &pblk->l_mg;
-	u64 off;
-	int bit = -1;
-	int emeta_secs;
-
-	line->sec_in_line = lm->sec_per_line;
-
-	/* Capture bad block information on line mapping bitmaps */
-	while ((bit = find_next_bit(line->blk_bitmap, lm->blk_per_line,
-					bit + 1)) < lm->blk_per_line) {
-		off = bit * geo->ws_opt;
-		bitmap_shift_left(l_mg->bb_aux, l_mg->bb_template, off,
-							lm->sec_per_line);
-		bitmap_or(line->map_bitmap, line->map_bitmap, l_mg->bb_aux,
-							lm->sec_per_line);
-		line->sec_in_line -= geo->clba;
-	}
-
-	/* Mark smeta metadata sectors as bad sectors */
-	bit = find_first_zero_bit(line->blk_bitmap, lm->blk_per_line);
-	off = bit * geo->ws_opt;
-	bitmap_set(line->map_bitmap, off, lm->smeta_sec);
-	line->sec_in_line -= lm->smeta_sec;
-	line->cur_sec = off + lm->smeta_sec;
-
-	if (init && pblk_line_smeta_write(pblk, line, off)) {
-		pblk_debug(pblk, "line smeta I/O failed. Retry\n");
-		return 0;
-	}
-
-	bitmap_copy(line->invalid_bitmap, line->map_bitmap, lm->sec_per_line);
-
-	/* Mark emeta metadata sectors as bad sectors. We need to consider bad
-	 * blocks to make sure that there are enough sectors to store emeta
-	 */
-	emeta_secs = lm->emeta_sec[0];
-	off = lm->sec_per_line;
-	while (emeta_secs) {
-		off -= geo->ws_opt;
-		if (!test_bit(off, line->invalid_bitmap)) {
-			bitmap_set(line->invalid_bitmap, off, geo->ws_opt);
-			emeta_secs -= geo->ws_opt;
-		}
-	}
-
-	line->emeta_ssec = off;
-	line->sec_in_line -= lm->emeta_sec[0];
-	line->nr_valid_lbas = 0;
-	line->left_msecs = line->sec_in_line;
-	*line->vsc = cpu_to_le32(line->sec_in_line);
-
-	if (lm->sec_per_line - line->sec_in_line !=
-		bitmap_weight(line->invalid_bitmap, lm->sec_per_line)) {
-		spin_lock(&line->lock);
-		line->state = PBLK_LINESTATE_BAD;
-		trace_pblk_line_state(pblk_disk_name(pblk), line->id,
-					line->state);
-		spin_unlock(&line->lock);
-
-		list_add_tail(&line->list, &l_mg->bad_list);
-		pblk_err(pblk, "unexpected line %d is bad\n", line->id);
-
-		return 0;
-	}
-
-	return 1;
-}
-
-static int pblk_prepare_new_line(struct pblk *pblk, struct pblk_line *line)
-{
-	struct pblk_line_meta *lm = &pblk->lm;
-	struct nvm_tgt_dev *dev = pblk->dev;
-	struct nvm_geo *geo = &dev->geo;
-	int blk_to_erase = atomic_read(&line->blk_in_line);
-	int i;
-
-	for (i = 0; i < lm->blk_per_line; i++) {
-		struct pblk_lun *rlun = &pblk->luns[i];
-		int pos = pblk_ppa_to_pos(geo, rlun->bppa);
-		int state = line->chks[pos].state;
-
-		/* Free chunks should not be erased */
-		if (state & NVM_CHK_ST_FREE) {
-			set_bit(pblk_ppa_to_pos(geo, rlun->bppa),
-							line->erase_bitmap);
-			blk_to_erase--;
-		}
-	}
-
-	return blk_to_erase;
-}
-
-static int pblk_line_prepare(struct pblk *pblk, struct pblk_line *line)
-{
-	struct pblk_line_meta *lm = &pblk->lm;
-	int blk_in_line = atomic_read(&line->blk_in_line);
-	int blk_to_erase;
-
-	/* Bad blocks do not need to be erased */
-	bitmap_copy(line->erase_bitmap, line->blk_bitmap, lm->blk_per_line);
-
-	spin_lock(&line->lock);
-
-	/* If we have not written to this line, we need to mark up free chunks
-	 * as already erased
-	 */
-	if (line->state == PBLK_LINESTATE_NEW) {
-		blk_to_erase = pblk_prepare_new_line(pblk, line);
-		line->state = PBLK_LINESTATE_FREE;
-		trace_pblk_line_state(pblk_disk_name(pblk), line->id,
-					line->state);
-	} else {
-		blk_to_erase = blk_in_line;
-	}
-
-	if (blk_in_line < lm->min_blk_line) {
-		spin_unlock(&line->lock);
-		return -EAGAIN;
-	}
-
-	if (line->state != PBLK_LINESTATE_FREE) {
-		WARN(1, "pblk: corrupted line %d, state %d\n",
-							line->id, line->state);
-		spin_unlock(&line->lock);
-		return -EINTR;
-	}
-
-	line->state = PBLK_LINESTATE_OPEN;
-	trace_pblk_line_state(pblk_disk_name(pblk), line->id,
-				line->state);
-
-	atomic_set(&line->left_eblks, blk_to_erase);
-	atomic_set(&line->left_seblks, blk_to_erase);
-
-	line->meta_distance = lm->meta_distance;
-	spin_unlock(&line->lock);
-
-	kref_init(&line->ref);
-	atomic_set(&line->sec_to_update, 0);
-
-	return 0;
-}
-
-/* Line allocations in the recovery path are always single threaded */
-int pblk_line_recov_alloc(struct pblk *pblk, struct pblk_line *line)
-{
-	struct pblk_line_mgmt *l_mg = &pblk->l_mg;
-	int ret;
-
-	spin_lock(&l_mg->free_lock);
-	l_mg->data_line = line;
-	list_del(&line->list);
-
-	ret = pblk_line_prepare(pblk, line);
-	if (ret) {
-		list_add(&line->list, &l_mg->free_list);
-		spin_unlock(&l_mg->free_lock);
-		return ret;
-	}
-	spin_unlock(&l_mg->free_lock);
-
-	ret = pblk_line_alloc_bitmaps(pblk, line);
-	if (ret)
-		goto fail;
-
-	if (!pblk_line_init_bb(pblk, line, 0)) {
-		ret = -EINTR;
-		goto fail;
-	}
-
-	pblk_rl_free_lines_dec(&pblk->rl, line, true);
-	return 0;
-
-fail:
-	spin_lock(&l_mg->free_lock);
-	list_add(&line->list, &l_mg->free_list);
-	spin_unlock(&l_mg->free_lock);
-
-	return ret;
-}
-
-void pblk_line_recov_close(struct pblk *pblk, struct pblk_line *line)
-{
-	struct pblk_line_mgmt *l_mg = &pblk->l_mg;
-
-	mempool_free(line->map_bitmap, l_mg->bitmap_pool);
-	line->map_bitmap = NULL;
-	line->smeta = NULL;
-	line->emeta = NULL;
-}
-
-static void pblk_line_reinit(struct pblk_line *line)
-{
-	*line->vsc = cpu_to_le32(EMPTY_ENTRY);
-
-	line->map_bitmap = NULL;
-	line->invalid_bitmap = NULL;
-	line->smeta = NULL;
-	line->emeta = NULL;
-}
-
-void pblk_line_free(struct pblk_line *line)
-{
-	struct pblk *pblk = line->pblk;
-	struct pblk_line_mgmt *l_mg = &pblk->l_mg;
-
-	mempool_free(line->map_bitmap, l_mg->bitmap_pool);
-	mempool_free(line->invalid_bitmap, l_mg->bitmap_pool);
-
-	pblk_line_reinit(line);
-}
-
-struct pblk_line *pblk_line_get(struct pblk *pblk)
-{
-	struct pblk_line_mgmt *l_mg = &pblk->l_mg;
-	struct pblk_line_meta *lm = &pblk->lm;
-	struct pblk_line *line;
-	int ret, bit;
-
-	lockdep_assert_held(&l_mg->free_lock);
-
-retry:
-	if (list_empty(&l_mg->free_list)) {
-		pblk_err(pblk, "no free lines\n");
-		return NULL;
-	}
-
-	line = list_first_entry(&l_mg->free_list, struct pblk_line, list);
-	list_del(&line->list);
-	l_mg->nr_free_lines--;
-
-	bit = find_first_zero_bit(line->blk_bitmap, lm->blk_per_line);
-	if (unlikely(bit >= lm->blk_per_line)) {
-		spin_lock(&line->lock);
-		line->state = PBLK_LINESTATE_BAD;
-		trace_pblk_line_state(pblk_disk_name(pblk), line->id,
-					line->state);
-		spin_unlock(&line->lock);
-
-		list_add_tail(&line->list, &l_mg->bad_list);
-
-		pblk_debug(pblk, "line %d is bad\n", line->id);
-		goto retry;
-	}
-
-	ret = pblk_line_prepare(pblk, line);
-	if (ret) {
-		switch (ret) {
-		case -EAGAIN:
-			list_add(&line->list, &l_mg->bad_list);
-			goto retry;
-		case -EINTR:
-			list_add(&line->list, &l_mg->corrupt_list);
-			goto retry;
-		default:
-			pblk_err(pblk, "failed to prepare line %d\n", line->id);
-			list_add(&line->list, &l_mg->free_list);
-			l_mg->nr_free_lines++;
-			return NULL;
-		}
-	}
-
-	return line;
-}
-
-static struct pblk_line *pblk_line_retry(struct pblk *pblk,
-					 struct pblk_line *line)
-{
-	struct pblk_line_mgmt *l_mg = &pblk->l_mg;
-	struct pblk_line *retry_line;
-
-retry:
-	spin_lock(&l_mg->free_lock);
-	retry_line = pblk_line_get(pblk);
-	if (!retry_line) {
-		l_mg->data_line = NULL;
-		spin_unlock(&l_mg->free_lock);
-		return NULL;
-	}
-
-	retry_line->map_bitmap = line->map_bitmap;
-	retry_line->invalid_bitmap = line->invalid_bitmap;
-	retry_line->smeta = line->smeta;
-	retry_line->emeta = line->emeta;
-	retry_line->meta_line = line->meta_line;
-
-	pblk_line_reinit(line);
-
-	l_mg->data_line = retry_line;
-	spin_unlock(&l_mg->free_lock);
-
-	pblk_rl_free_lines_dec(&pblk->rl, line, false);
-
-	if (pblk_line_erase(pblk, retry_line))
-		goto retry;
-
-	return retry_line;
-}
-
-static void pblk_set_space_limit(struct pblk *pblk)
-{
-	struct pblk_rl *rl = &pblk->rl;
-
-	atomic_set(&rl->rb_space, 0);
-}
-
-struct pblk_line *pblk_line_get_first_data(struct pblk *pblk)
-{
-	struct pblk_line_mgmt *l_mg = &pblk->l_mg;
-	struct pblk_line *line;
-
-	spin_lock(&l_mg->free_lock);
-	line = pblk_line_get(pblk);
-	if (!line) {
-		spin_unlock(&l_mg->free_lock);
-		return NULL;
-	}
-
-	line->seq_nr = l_mg->d_seq_nr++;
-	line->type = PBLK_LINETYPE_DATA;
-	l_mg->data_line = line;
-
-	pblk_line_setup_metadata(line, l_mg, &pblk->lm);
-
-	/* Allocate next line for preparation */
-	l_mg->data_next = pblk_line_get(pblk);
-	if (!l_mg->data_next) {
-		/* If we cannot get a new line, we need to stop the pipeline.
-		 * Only allow as many writes in as we can store safely and then
-		 * fail gracefully
-		 */
-		pblk_set_space_limit(pblk);
-
-		l_mg->data_next = NULL;
-	} else {
-		l_mg->data_next->seq_nr = l_mg->d_seq_nr++;
-		l_mg->data_next->type = PBLK_LINETYPE_DATA;
-	}
-	spin_unlock(&l_mg->free_lock);
-
-	if (pblk_line_alloc_bitmaps(pblk, line))
-		return NULL;
-
-	if (pblk_line_erase(pblk, line)) {
-		line = pblk_line_retry(pblk, line);
-		if (!line)
-			return NULL;
-	}
-
-retry_setup:
-	if (!pblk_line_init_metadata(pblk, line, NULL)) {
-		line = pblk_line_retry(pblk, line);
-		if (!line)
-			return NULL;
-
-		goto retry_setup;
-	}
-
-	if (!pblk_line_init_bb(pblk, line, 1)) {
-		line = pblk_line_retry(pblk, line);
-		if (!line)
-			return NULL;
-
-		goto retry_setup;
-	}
-
-	pblk_rl_free_lines_dec(&pblk->rl, line, true);
-
-	return line;
-}
-
-void pblk_ppa_to_line_put(struct pblk *pblk, struct ppa_addr ppa)
-{
-	struct pblk_line *line;
-
-	line = pblk_ppa_to_line(pblk, ppa);
-	kref_put(&line->ref, pblk_line_put_wq);
-}
-
-void pblk_rq_to_line_put(struct pblk *pblk, struct nvm_rq *rqd)
-{
-	struct ppa_addr *ppa_list = nvm_rq_to_ppa_list(rqd);
-	int i;
-
-	for (i = 0; i < rqd->nr_ppas; i++)
-		pblk_ppa_to_line_put(pblk, ppa_list[i]);
-}
-
-static void pblk_stop_writes(struct pblk *pblk, struct pblk_line *line)
-{
-	lockdep_assert_held(&pblk->l_mg.free_lock);
-
-	pblk_set_space_limit(pblk);
-	pblk->state = PBLK_STATE_STOPPING;
-	trace_pblk_state(pblk_disk_name(pblk), pblk->state);
-}
-
-static void pblk_line_close_meta_sync(struct pblk *pblk)
-{
-	struct pblk_line_mgmt *l_mg = &pblk->l_mg;
-	struct pblk_line_meta *lm = &pblk->lm;
-	struct pblk_line *line, *tline;
-	LIST_HEAD(list);
-
-	spin_lock(&l_mg->close_lock);
-	if (list_empty(&l_mg->emeta_list)) {
-		spin_unlock(&l_mg->close_lock);
-		return;
-	}
-
-	list_cut_position(&list, &l_mg->emeta_list, l_mg->emeta_list.prev);
-	spin_unlock(&l_mg->close_lock);
-
-	list_for_each_entry_safe(line, tline, &list, list) {
-		struct pblk_emeta *emeta = line->emeta;
-
-		while (emeta->mem < lm->emeta_len[0]) {
-			int ret;
-
-			ret = pblk_submit_meta_io(pblk, line);
-			if (ret) {
-				pblk_err(pblk, "sync meta line %d failed (%d)\n",
-							line->id, ret);
-				return;
-			}
-		}
-	}
-
-	pblk_wait_for_meta(pblk);
-	flush_workqueue(pblk->close_wq);
-}
-
-void __pblk_pipeline_flush(struct pblk *pblk)
-{
-	struct pblk_line_mgmt *l_mg = &pblk->l_mg;
-	int ret;
-
-	spin_lock(&l_mg->free_lock);
-	if (pblk->state == PBLK_STATE_RECOVERING ||
-					pblk->state == PBLK_STATE_STOPPED) {
-		spin_unlock(&l_mg->free_lock);
-		return;
-	}
-	pblk->state = PBLK_STATE_RECOVERING;
-	trace_pblk_state(pblk_disk_name(pblk), pblk->state);
-	spin_unlock(&l_mg->free_lock);
-
-	pblk_flush_writer(pblk);
-	pblk_wait_for_meta(pblk);
-
-	ret = pblk_recov_pad(pblk);
-	if (ret) {
-		pblk_err(pblk, "could not close data on teardown(%d)\n", ret);
-		return;
-	}
-
-	flush_workqueue(pblk->bb_wq);
-	pblk_line_close_meta_sync(pblk);
-}
-
-void __pblk_pipeline_stop(struct pblk *pblk)
-{
-	struct pblk_line_mgmt *l_mg = &pblk->l_mg;
-
-	spin_lock(&l_mg->free_lock);
-	pblk->state = PBLK_STATE_STOPPED;
-	trace_pblk_state(pblk_disk_name(pblk), pblk->state);
-	l_mg->data_line = NULL;
-	l_mg->data_next = NULL;
-	spin_unlock(&l_mg->free_lock);
-}
-
-void pblk_pipeline_stop(struct pblk *pblk)
-{
-	__pblk_pipeline_flush(pblk);
-	__pblk_pipeline_stop(pblk);
-}
-
-struct pblk_line *pblk_line_replace_data(struct pblk *pblk)
-{
-	struct pblk_line_mgmt *l_mg = &pblk->l_mg;
-	struct pblk_line *cur, *new = NULL;
-	unsigned int left_seblks;
-
-	new = l_mg->data_next;
-	if (!new)
-		goto out;
-
-	spin_lock(&l_mg->free_lock);
-	cur = l_mg->data_line;
-	l_mg->data_line = new;
-
-	pblk_line_setup_metadata(new, l_mg, &pblk->lm);
-	spin_unlock(&l_mg->free_lock);
-
-retry_erase:
-	left_seblks = atomic_read(&new->left_seblks);
-	if (left_seblks) {
-		/* If line is not fully erased, erase it */
-		if (atomic_read(&new->left_eblks)) {
-			if (pblk_line_erase(pblk, new))
-				goto out;
-		} else {
-			io_schedule();
-		}
-		goto retry_erase;
-	}
-
-	if (pblk_line_alloc_bitmaps(pblk, new))
-		return NULL;
-
-retry_setup:
-	if (!pblk_line_init_metadata(pblk, new, cur)) {
-		new = pblk_line_retry(pblk, new);
-		if (!new)
-			goto out;
-
-		goto retry_setup;
-	}
-
-	if (!pblk_line_init_bb(pblk, new, 1)) {
-		new = pblk_line_retry(pblk, new);
-		if (!new)
-			goto out;
-
-		goto retry_setup;
-	}
-
-	pblk_rl_free_lines_dec(&pblk->rl, new, true);
-
-	/* Allocate next line for preparation */
-	spin_lock(&l_mg->free_lock);
-	l_mg->data_next = pblk_line_get(pblk);
-	if (!l_mg->data_next) {
-		/* If we cannot get a new line, we need to stop the pipeline.
-		 * Only allow as many writes in as we can store safely and then
-		 * fail gracefully
-		 */
-		pblk_stop_writes(pblk, new);
-		l_mg->data_next = NULL;
-	} else {
-		l_mg->data_next->seq_nr = l_mg->d_seq_nr++;
-		l_mg->data_next->type = PBLK_LINETYPE_DATA;
-	}
-	spin_unlock(&l_mg->free_lock);
-
-out:
-	return new;
-}
-
-static void __pblk_line_put(struct pblk *pblk, struct pblk_line *line)
-{
-	struct pblk_line_mgmt *l_mg = &pblk->l_mg;
-	struct pblk_gc *gc = &pblk->gc;
-
-	spin_lock(&line->lock);
-	WARN_ON(line->state != PBLK_LINESTATE_GC);
-	if (line->w_err_gc->has_gc_err) {
-		spin_unlock(&line->lock);
-		pblk_err(pblk, "line %d had errors during GC\n", line->id);
-		pblk_put_line_back(pblk, line);
-		line->w_err_gc->has_gc_err = 0;
-		return;
-	}
-
-	line->state = PBLK_LINESTATE_FREE;
-	trace_pblk_line_state(pblk_disk_name(pblk), line->id,
-					line->state);
-	line->gc_group = PBLK_LINEGC_NONE;
-	pblk_line_free(line);
-
-	if (line->w_err_gc->has_write_err) {
-		pblk_rl_werr_line_out(&pblk->rl);
-		line->w_err_gc->has_write_err = 0;
-	}
-
-	spin_unlock(&line->lock);
-	atomic_dec(&gc->pipeline_gc);
-
-	spin_lock(&l_mg->free_lock);
-	list_add_tail(&line->list, &l_mg->free_list);
-	l_mg->nr_free_lines++;
-	spin_unlock(&l_mg->free_lock);
-
-	pblk_rl_free_lines_inc(&pblk->rl, line);
-}
-
-static void pblk_line_put_ws(struct work_struct *work)
-{
-	struct pblk_line_ws *line_put_ws = container_of(work,
-						struct pblk_line_ws, ws);
-	struct pblk *pblk = line_put_ws->pblk;
-	struct pblk_line *line = line_put_ws->line;
-
-	__pblk_line_put(pblk, line);
-	mempool_free(line_put_ws, &pblk->gen_ws_pool);
-}
-
-void pblk_line_put(struct kref *ref)
-{
-	struct pblk_line *line = container_of(ref, struct pblk_line, ref);
-	struct pblk *pblk = line->pblk;
-
-	__pblk_line_put(pblk, line);
-}
-
-void pblk_line_put_wq(struct kref *ref)
-{
-	struct pblk_line *line = container_of(ref, struct pblk_line, ref);
-	struct pblk *pblk = line->pblk;
-	struct pblk_line_ws *line_put_ws;
-
-	line_put_ws = mempool_alloc(&pblk->gen_ws_pool, GFP_ATOMIC);
-	if (!line_put_ws)
-		return;
-
-	line_put_ws->pblk = pblk;
-	line_put_ws->line = line;
-	line_put_ws->priv = NULL;
-
-	INIT_WORK(&line_put_ws->ws, pblk_line_put_ws);
-	queue_work(pblk->r_end_wq, &line_put_ws->ws);
-}
-
-int pblk_blk_erase_async(struct pblk *pblk, struct ppa_addr ppa)
-{
-	struct nvm_rq *rqd;
-	int err;
-
-	rqd = pblk_alloc_rqd(pblk, PBLK_ERASE);
-
-	pblk_setup_e_rq(pblk, rqd, ppa);
-
-	rqd->end_io = pblk_end_io_erase;
-	rqd->private = pblk;
-
-	trace_pblk_chunk_reset(pblk_disk_name(pblk),
-				&ppa, PBLK_CHUNK_RESET_START);
-
-	/* The write thread schedules erases so that it minimizes disturbances
-	 * with writes. Thus, there is no need to take the LUN semaphore.
-	 */
-	err = pblk_submit_io(pblk, rqd, NULL);
-	if (err) {
-		struct nvm_tgt_dev *dev = pblk->dev;
-		struct nvm_geo *geo = &dev->geo;
-
-		pblk_err(pblk, "could not async erase line:%d,blk:%d\n",
-					pblk_ppa_to_line_id(ppa),
-					pblk_ppa_to_pos(geo, ppa));
-	}
-
-	return err;
-}
-
-struct pblk_line *pblk_line_get_data(struct pblk *pblk)
-{
-	return pblk->l_mg.data_line;
-}
-
-/* For now, always erase next line */
-struct pblk_line *pblk_line_get_erase(struct pblk *pblk)
-{
-	return pblk->l_mg.data_next;
-}
-
-int pblk_line_is_full(struct pblk_line *line)
-{
-	return (line->left_msecs == 0);
-}
-
-static void pblk_line_should_sync_meta(struct pblk *pblk)
-{
-	if (pblk_rl_is_limit(&pblk->rl))
-		pblk_line_close_meta_sync(pblk);
-}
-
-void pblk_line_close(struct pblk *pblk, struct pblk_line *line)
-{
-	struct nvm_tgt_dev *dev = pblk->dev;
-	struct nvm_geo *geo = &dev->geo;
-	struct pblk_line_meta *lm = &pblk->lm;
-	struct pblk_line_mgmt *l_mg = &pblk->l_mg;
-	struct list_head *move_list;
-	int i;
-
-#ifdef CONFIG_NVM_PBLK_DEBUG
-	WARN(!bitmap_full(line->map_bitmap, lm->sec_per_line),
-				"pblk: corrupt closed line %d\n", line->id);
-#endif
-
-	spin_lock(&l_mg->free_lock);
-	WARN_ON(!test_and_clear_bit(line->meta_line, &l_mg->meta_bitmap));
-	spin_unlock(&l_mg->free_lock);
-
-	spin_lock(&l_mg->gc_lock);
-	spin_lock(&line->lock);
-	WARN_ON(line->state != PBLK_LINESTATE_OPEN);
-	line->state = PBLK_LINESTATE_CLOSED;
-	move_list = pblk_line_gc_list(pblk, line);
-	list_add_tail(&line->list, move_list);
-
-	mempool_free(line->map_bitmap, l_mg->bitmap_pool);
-	line->map_bitmap = NULL;
-	line->smeta = NULL;
-	line->emeta = NULL;
-
-	for (i = 0; i < lm->blk_per_line; i++) {
-		struct pblk_lun *rlun = &pblk->luns[i];
-		int pos = pblk_ppa_to_pos(geo, rlun->bppa);
-		int state = line->chks[pos].state;
-
-		if (!(state & NVM_CHK_ST_OFFLINE))
-			state = NVM_CHK_ST_CLOSED;
-	}
-
-	spin_unlock(&line->lock);
-	spin_unlock(&l_mg->gc_lock);
-
-	trace_pblk_line_state(pblk_disk_name(pblk), line->id,
-					line->state);
-}
-
-void pblk_line_close_meta(struct pblk *pblk, struct pblk_line *line)
-{
-	struct pblk_line_mgmt *l_mg = &pblk->l_mg;
-	struct pblk_line_meta *lm = &pblk->lm;
-	struct pblk_emeta *emeta = line->emeta;
-	struct line_emeta *emeta_buf = emeta->buf;
-	struct wa_counters *wa = emeta_to_wa(lm, emeta_buf);
-
-	/* No need for exact vsc value; avoid a big line lock and take aprox. */
-	memcpy(emeta_to_vsc(pblk, emeta_buf), l_mg->vsc_list, lm->vsc_list_len);
-	memcpy(emeta_to_bb(emeta_buf), line->blk_bitmap, lm->blk_bitmap_len);
-
-	wa->user = cpu_to_le64(atomic64_read(&pblk->user_wa));
-	wa->pad = cpu_to_le64(atomic64_read(&pblk->pad_wa));
-	wa->gc = cpu_to_le64(atomic64_read(&pblk->gc_wa));
-
-	if (le32_to_cpu(emeta_buf->header.identifier) != PBLK_MAGIC) {
-		emeta_buf->header.identifier = cpu_to_le32(PBLK_MAGIC);
-		export_guid(emeta_buf->header.uuid, &pblk->instance_uuid);
-		emeta_buf->header.id = cpu_to_le32(line->id);
-		emeta_buf->header.type = cpu_to_le16(line->type);
-		emeta_buf->header.version_major = EMETA_VERSION_MAJOR;
-		emeta_buf->header.version_minor = EMETA_VERSION_MINOR;
-		emeta_buf->header.crc = cpu_to_le32(
-			pblk_calc_meta_header_crc(pblk, &emeta_buf->header));
-	}
-
-	emeta_buf->nr_valid_lbas = cpu_to_le64(line->nr_valid_lbas);
-	emeta_buf->crc = cpu_to_le32(pblk_calc_emeta_crc(pblk, emeta_buf));
-
-	spin_lock(&l_mg->close_lock);
-	spin_lock(&line->lock);
-
-	/* Update the in-memory start address for emeta, in case it has
-	 * shifted due to write errors
-	 */
-	if (line->emeta_ssec != line->cur_sec)
-		line->emeta_ssec = line->cur_sec;
-
-	list_add_tail(&line->list, &l_mg->emeta_list);
-	spin_unlock(&line->lock);
-	spin_unlock(&l_mg->close_lock);
-
-	pblk_line_should_sync_meta(pblk);
-}
-
-static void pblk_save_lba_list(struct pblk *pblk, struct pblk_line *line)
-{
-	struct pblk_line_meta *lm = &pblk->lm;
-	unsigned int lba_list_size = lm->emeta_len[2];
-	struct pblk_w_err_gc *w_err_gc = line->w_err_gc;
-	struct pblk_emeta *emeta = line->emeta;
-
-	w_err_gc->lba_list = kvmalloc(lba_list_size, GFP_KERNEL);
-	memcpy(w_err_gc->lba_list, emeta_to_lbas(pblk, emeta->buf),
-				lba_list_size);
-}
-
-void pblk_line_close_ws(struct work_struct *work)
-{
-	struct pblk_line_ws *line_ws = container_of(work, struct pblk_line_ws,
-									ws);
-	struct pblk *pblk = line_ws->pblk;
-	struct pblk_line *line = line_ws->line;
-	struct pblk_w_err_gc *w_err_gc = line->w_err_gc;
-
-	/* Write errors makes the emeta start address stored in smeta invalid,
-	 * so keep a copy of the lba list until we've gc'd the line
-	 */
-	if (w_err_gc->has_write_err)
-		pblk_save_lba_list(pblk, line);
-
-	pblk_line_close(pblk, line);
-	mempool_free(line_ws, &pblk->gen_ws_pool);
-}
-
-void pblk_gen_run_ws(struct pblk *pblk, struct pblk_line *line, void *priv,
-		      void (*work)(struct work_struct *), gfp_t gfp_mask,
-		      struct workqueue_struct *wq)
-{
-	struct pblk_line_ws *line_ws;
-
-	line_ws = mempool_alloc(&pblk->gen_ws_pool, gfp_mask);
-	if (!line_ws) {
-		pblk_err(pblk, "pblk: could not allocate memory\n");
-		return;
-	}
-
-	line_ws->pblk = pblk;
-	line_ws->line = line;
-	line_ws->priv = priv;
-
-	INIT_WORK(&line_ws->ws, work);
-	queue_work(wq, &line_ws->ws);
-}
-
-static void __pblk_down_chunk(struct pblk *pblk, int pos)
-{
-	struct pblk_lun *rlun = &pblk->luns[pos];
-	int ret;
-
-	/*
-	 * Only send one inflight I/O per LUN. Since we map at a page
-	 * granurality, all ppas in the I/O will map to the same LUN
-	 */
-
-	ret = down_timeout(&rlun->wr_sem, msecs_to_jiffies(30000));
-	if (ret == -ETIME || ret == -EINTR)
-		pblk_err(pblk, "taking lun semaphore timed out: err %d\n",
-				-ret);
-}
-
-void pblk_down_chunk(struct pblk *pblk, struct ppa_addr ppa)
-{
-	struct nvm_tgt_dev *dev = pblk->dev;
-	struct nvm_geo *geo = &dev->geo;
-	int pos = pblk_ppa_to_pos(geo, ppa);
-
-	__pblk_down_chunk(pblk, pos);
-}
-
-void pblk_down_rq(struct pblk *pblk, struct ppa_addr ppa,
-		  unsigned long *lun_bitmap)
-{
-	struct nvm_tgt_dev *dev = pblk->dev;
-	struct nvm_geo *geo = &dev->geo;
-	int pos = pblk_ppa_to_pos(geo, ppa);
-
-	/* If the LUN has been locked for this same request, do no attempt to
-	 * lock it again
-	 */
-	if (test_and_set_bit(pos, lun_bitmap))
-		return;
-
-	__pblk_down_chunk(pblk, pos);
-}
-
-void pblk_up_chunk(struct pblk *pblk, struct ppa_addr ppa)
-{
-	struct nvm_tgt_dev *dev = pblk->dev;
-	struct nvm_geo *geo = &dev->geo;
-	struct pblk_lun *rlun;
-	int pos = pblk_ppa_to_pos(geo, ppa);
-
-	rlun = &pblk->luns[pos];
-	up(&rlun->wr_sem);
-}
-
-void pblk_up_rq(struct pblk *pblk, unsigned long *lun_bitmap)
-{
-	struct nvm_tgt_dev *dev = pblk->dev;
-	struct nvm_geo *geo = &dev->geo;
-	struct pblk_lun *rlun;
-	int num_lun = geo->all_luns;
-	int bit = -1;
-
-	while ((bit = find_next_bit(lun_bitmap, num_lun, bit + 1)) < num_lun) {
-		rlun = &pblk->luns[bit];
-		up(&rlun->wr_sem);
-	}
-}
-
-void pblk_update_map(struct pblk *pblk, sector_t lba, struct ppa_addr ppa)
-{
-	struct ppa_addr ppa_l2p;
-
-	/* logic error: lba out-of-bounds. Ignore update */
-	if (!(lba < pblk->capacity)) {
-		WARN(1, "pblk: corrupted L2P map request\n");
-		return;
-	}
-
-	spin_lock(&pblk->trans_lock);
-	ppa_l2p = pblk_trans_map_get(pblk, lba);
-
-	if (!pblk_addr_in_cache(ppa_l2p) && !pblk_ppa_empty(ppa_l2p))
-		pblk_map_invalidate(pblk, ppa_l2p);
-
-	pblk_trans_map_set(pblk, lba, ppa);
-	spin_unlock(&pblk->trans_lock);
-}
-
-void pblk_update_map_cache(struct pblk *pblk, sector_t lba, struct ppa_addr ppa)
-{
-
-#ifdef CONFIG_NVM_PBLK_DEBUG
-	/* Callers must ensure that the ppa points to a cache address */
-	BUG_ON(!pblk_addr_in_cache(ppa));
-	BUG_ON(pblk_rb_pos_oob(&pblk->rwb, pblk_addr_to_cacheline(ppa)));
-#endif
-
-	pblk_update_map(pblk, lba, ppa);
-}
-
-int pblk_update_map_gc(struct pblk *pblk, sector_t lba, struct ppa_addr ppa_new,
-		       struct pblk_line *gc_line, u64 paddr_gc)
-{
-	struct ppa_addr ppa_l2p, ppa_gc;
-	int ret = 1;
-
-#ifdef CONFIG_NVM_PBLK_DEBUG
-	/* Callers must ensure that the ppa points to a cache address */
-	BUG_ON(!pblk_addr_in_cache(ppa_new));
-	BUG_ON(pblk_rb_pos_oob(&pblk->rwb, pblk_addr_to_cacheline(ppa_new)));
-#endif
-
-	/* logic error: lba out-of-bounds. Ignore update */
-	if (!(lba < pblk->capacity)) {
-		WARN(1, "pblk: corrupted L2P map request\n");
-		return 0;
-	}
-
-	spin_lock(&pblk->trans_lock);
-	ppa_l2p = pblk_trans_map_get(pblk, lba);
-	ppa_gc = addr_to_gen_ppa(pblk, paddr_gc, gc_line->id);
-
-	if (!pblk_ppa_comp(ppa_l2p, ppa_gc)) {
-		spin_lock(&gc_line->lock);
-		WARN(!test_bit(paddr_gc, gc_line->invalid_bitmap),
-						"pblk: corrupted GC update");
-		spin_unlock(&gc_line->lock);
-
-		ret = 0;
-		goto out;
-	}
-
-	pblk_trans_map_set(pblk, lba, ppa_new);
-out:
-	spin_unlock(&pblk->trans_lock);
-	return ret;
-}
-
-void pblk_update_map_dev(struct pblk *pblk, sector_t lba,
-			 struct ppa_addr ppa_mapped, struct ppa_addr ppa_cache)
-{
-	struct ppa_addr ppa_l2p;
-
-#ifdef CONFIG_NVM_PBLK_DEBUG
-	/* Callers must ensure that the ppa points to a device address */
-	BUG_ON(pblk_addr_in_cache(ppa_mapped));
-#endif
-	/* Invalidate and discard padded entries */
-	if (lba == ADDR_EMPTY) {
-		atomic64_inc(&pblk->pad_wa);
-#ifdef CONFIG_NVM_PBLK_DEBUG
-		atomic_long_inc(&pblk->padded_wb);
-#endif
-		if (!pblk_ppa_empty(ppa_mapped))
-			pblk_map_invalidate(pblk, ppa_mapped);
-		return;
-	}
-
-	/* logic error: lba out-of-bounds. Ignore update */
-	if (!(lba < pblk->capacity)) {
-		WARN(1, "pblk: corrupted L2P map request\n");
-		return;
-	}
-
-	spin_lock(&pblk->trans_lock);
-	ppa_l2p = pblk_trans_map_get(pblk, lba);
-
-	/* Do not update L2P if the cacheline has been updated. In this case,
-	 * the mapped ppa must be invalidated
-	 */
-	if (!pblk_ppa_comp(ppa_l2p, ppa_cache)) {
-		if (!pblk_ppa_empty(ppa_mapped))
-			pblk_map_invalidate(pblk, ppa_mapped);
-		goto out;
-	}
-
-#ifdef CONFIG_NVM_PBLK_DEBUG
-	WARN_ON(!pblk_addr_in_cache(ppa_l2p) && !pblk_ppa_empty(ppa_l2p));
-#endif
-
-	pblk_trans_map_set(pblk, lba, ppa_mapped);
-out:
-	spin_unlock(&pblk->trans_lock);
-}
-
-int pblk_lookup_l2p_seq(struct pblk *pblk, struct ppa_addr *ppas,
-			 sector_t blba, int nr_secs, bool *from_cache)
-{
-	int i;
-
-	spin_lock(&pblk->trans_lock);
-	for (i = 0; i < nr_secs; i++) {
-		struct ppa_addr ppa;
-
-		ppa = ppas[i] = pblk_trans_map_get(pblk, blba + i);
-
-		/* If the L2P entry maps to a line, the reference is valid */
-		if (!pblk_ppa_empty(ppa) && !pblk_addr_in_cache(ppa)) {
-			struct pblk_line *line = pblk_ppa_to_line(pblk, ppa);
-
-			if (i > 0 && *from_cache)
-				break;
-			*from_cache = false;
-
-			kref_get(&line->ref);
-		} else {
-			if (i > 0 && !*from_cache)
-				break;
-			*from_cache = true;
-		}
-	}
-	spin_unlock(&pblk->trans_lock);
-	return i;
-}
-
-void pblk_lookup_l2p_rand(struct pblk *pblk, struct ppa_addr *ppas,
-			  u64 *lba_list, int nr_secs)
-{
-	u64 lba;
-	int i;
-
-	spin_lock(&pblk->trans_lock);
-	for (i = 0; i < nr_secs; i++) {
-		lba = lba_list[i];
-		if (lba != ADDR_EMPTY) {
-			/* logic error: lba out-of-bounds. Ignore update */
-			if (!(lba < pblk->capacity)) {
-				WARN(1, "pblk: corrupted L2P map request\n");
-				continue;
-			}
-			ppas[i] = pblk_trans_map_get(pblk, lba);
-		}
-	}
-	spin_unlock(&pblk->trans_lock);
-}
-
-void *pblk_get_meta_for_writes(struct pblk *pblk, struct nvm_rq *rqd)
-{
-	void *buffer;
-
-	if (pblk_is_oob_meta_supported(pblk)) {
-		/* Just use OOB metadata buffer as always */
-		buffer = rqd->meta_list;
-	} else {
-		/* We need to reuse last page of request (packed metadata)
-		 * in similar way as traditional oob metadata
-		 */
-		buffer = page_to_virt(
-			rqd->bio->bi_io_vec[rqd->bio->bi_vcnt - 1].bv_page);
-	}
-
-	return buffer;
-}
-
-void pblk_get_packed_meta(struct pblk *pblk, struct nvm_rq *rqd)
-{
-	void *meta_list = rqd->meta_list;
-	void *page;
-	int i = 0;
-
-	if (pblk_is_oob_meta_supported(pblk))
-		return;
-
-	page = page_to_virt(rqd->bio->bi_io_vec[rqd->bio->bi_vcnt - 1].bv_page);
-	/* We need to fill oob meta buffer with data from packed metadata */
-	for (; i < rqd->nr_ppas; i++)
-		memcpy(pblk_get_meta(pblk, meta_list, i),
-			page + (i * sizeof(struct pblk_sec_meta)),
-			sizeof(struct pblk_sec_meta));
-}
diff --git a/drivers/lightnvm/pblk-gc.c b/drivers/lightnvm/pblk-gc.c
deleted file mode 100644
index b31658be35a7..000000000000
--- a/drivers/lightnvm/pblk-gc.c
+++ /dev/null
@@ -1,726 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright (C) 2016 CNEX Labs
- * Initial release: Javier Gonzalez <javier@cnexlabs.com>
- *                  Matias Bjorling <matias@cnexlabs.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License version
- * 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * pblk-gc.c - pblk's garbage collector
- */
-
-#include "pblk.h"
-#include "pblk-trace.h"
-#include <linux/delay.h>
-
-
-static void pblk_gc_free_gc_rq(struct pblk_gc_rq *gc_rq)
-{
-	vfree(gc_rq->data);
-	kfree(gc_rq);
-}
-
-static int pblk_gc_write(struct pblk *pblk)
-{
-	struct pblk_gc *gc = &pblk->gc;
-	struct pblk_gc_rq *gc_rq, *tgc_rq;
-	LIST_HEAD(w_list);
-
-	spin_lock(&gc->w_lock);
-	if (list_empty(&gc->w_list)) {
-		spin_unlock(&gc->w_lock);
-		return 1;
-	}
-
-	list_cut_position(&w_list, &gc->w_list, gc->w_list.prev);
-	gc->w_entries = 0;
-	spin_unlock(&gc->w_lock);
-
-	list_for_each_entry_safe(gc_rq, tgc_rq, &w_list, list) {
-		pblk_write_gc_to_cache(pblk, gc_rq);
-		list_del(&gc_rq->list);
-		kref_put(&gc_rq->line->ref, pblk_line_put);
-		pblk_gc_free_gc_rq(gc_rq);
-	}
-
-	return 0;
-}
-
-static void pblk_gc_writer_kick(struct pblk_gc *gc)
-{
-	wake_up_process(gc->gc_writer_ts);
-}
-
-void pblk_put_line_back(struct pblk *pblk, struct pblk_line *line)
-{
-	struct pblk_line_mgmt *l_mg = &pblk->l_mg;
-	struct list_head *move_list;
-
-	spin_lock(&l_mg->gc_lock);
-	spin_lock(&line->lock);
-	WARN_ON(line->state != PBLK_LINESTATE_GC);
-	line->state = PBLK_LINESTATE_CLOSED;
-	trace_pblk_line_state(pblk_disk_name(pblk), line->id,
-					line->state);
-
-	/* We need to reset gc_group in order to ensure that
-	 * pblk_line_gc_list will return proper move_list
-	 * since right now current line is not on any of the
-	 * gc lists.
-	 */
-	line->gc_group = PBLK_LINEGC_NONE;
-	move_list = pblk_line_gc_list(pblk, line);
-	spin_unlock(&line->lock);
-	list_add_tail(&line->list, move_list);
-	spin_unlock(&l_mg->gc_lock);
-}
-
-static void pblk_gc_line_ws(struct work_struct *work)
-{
-	struct pblk_line_ws *gc_rq_ws = container_of(work,
-						struct pblk_line_ws, ws);
-	struct pblk *pblk = gc_rq_ws->pblk;
-	struct pblk_gc *gc = &pblk->gc;
-	struct pblk_line *line = gc_rq_ws->line;
-	struct pblk_gc_rq *gc_rq = gc_rq_ws->priv;
-	int ret;
-
-	up(&gc->gc_sem);
-
-	/* Read from GC victim block */
-	ret = pblk_submit_read_gc(pblk, gc_rq);
-	if (ret) {
-		line->w_err_gc->has_gc_err = 1;
-		goto out;
-	}
-
-	if (!gc_rq->secs_to_gc)
-		goto out;
-
-retry:
-	spin_lock(&gc->w_lock);
-	if (gc->w_entries >= PBLK_GC_RQ_QD) {
-		spin_unlock(&gc->w_lock);
-		pblk_gc_writer_kick(&pblk->gc);
-		usleep_range(128, 256);
-		goto retry;
-	}
-	gc->w_entries++;
-	list_add_tail(&gc_rq->list, &gc->w_list);
-	spin_unlock(&gc->w_lock);
-
-	pblk_gc_writer_kick(&pblk->gc);
-
-	kfree(gc_rq_ws);
-	return;
-
-out:
-	pblk_gc_free_gc_rq(gc_rq);
-	kref_put(&line->ref, pblk_line_put);
-	kfree(gc_rq_ws);
-}
-
-static __le64 *get_lba_list_from_emeta(struct pblk *pblk,
-				       struct pblk_line *line)
-{
-	struct line_emeta *emeta_buf;
-	struct pblk_line_meta *lm = &pblk->lm;
-	unsigned int lba_list_size = lm->emeta_len[2];
-	__le64 *lba_list;
-	int ret;
-
-	emeta_buf = kvmalloc(lm->emeta_len[0], GFP_KERNEL);
-	if (!emeta_buf)
-		return NULL;
-
-	ret = pblk_line_emeta_read(pblk, line, emeta_buf);
-	if (ret) {
-		pblk_err(pblk, "line %d read emeta failed (%d)\n",
-				line->id, ret);
-		kvfree(emeta_buf);
-		return NULL;
-	}
-
-	/* If this read fails, it means that emeta is corrupted.
-	 * For now, leave the line untouched.
-	 * TODO: Implement a recovery routine that scans and moves
-	 * all sectors on the line.
-	 */
-
-	ret = pblk_recov_check_emeta(pblk, emeta_buf);
-	if (ret) {
-		pblk_err(pblk, "inconsistent emeta (line %d)\n",
-				line->id);
-		kvfree(emeta_buf);
-		return NULL;
-	}
-
-	lba_list = kvmalloc(lba_list_size, GFP_KERNEL);
-
-	if (lba_list)
-		memcpy(lba_list, emeta_to_lbas(pblk, emeta_buf), lba_list_size);
-
-	kvfree(emeta_buf);
-
-	return lba_list;
-}
-
-static void pblk_gc_line_prepare_ws(struct work_struct *work)
-{
-	struct pblk_line_ws *line_ws = container_of(work, struct pblk_line_ws,
-									ws);
-	struct pblk *pblk = line_ws->pblk;
-	struct pblk_line *line = line_ws->line;
-	struct pblk_line_meta *lm = &pblk->lm;
-	struct nvm_tgt_dev *dev = pblk->dev;
-	struct nvm_geo *geo = &dev->geo;
-	struct pblk_gc *gc = &pblk->gc;
-	struct pblk_line_ws *gc_rq_ws;
-	struct pblk_gc_rq *gc_rq;
-	__le64 *lba_list;
-	unsigned long *invalid_bitmap;
-	int sec_left, nr_secs, bit;
-
-	invalid_bitmap = kmalloc(lm->sec_bitmap_len, GFP_KERNEL);
-	if (!invalid_bitmap)
-		goto fail_free_ws;
-
-	if (line->w_err_gc->has_write_err) {
-		lba_list = line->w_err_gc->lba_list;
-		line->w_err_gc->lba_list = NULL;
-	} else {
-		lba_list = get_lba_list_from_emeta(pblk, line);
-		if (!lba_list) {
-			pblk_err(pblk, "could not interpret emeta (line %d)\n",
-					line->id);
-			goto fail_free_invalid_bitmap;
-		}
-	}
-
-	spin_lock(&line->lock);
-	bitmap_copy(invalid_bitmap, line->invalid_bitmap, lm->sec_per_line);
-	sec_left = pblk_line_vsc(line);
-	spin_unlock(&line->lock);
-
-	if (sec_left < 0) {
-		pblk_err(pblk, "corrupted GC line (%d)\n", line->id);
-		goto fail_free_lba_list;
-	}
-
-	bit = -1;
-next_rq:
-	gc_rq = kmalloc(sizeof(struct pblk_gc_rq), GFP_KERNEL);
-	if (!gc_rq)
-		goto fail_free_lba_list;
-
-	nr_secs = 0;
-	do {
-		bit = find_next_zero_bit(invalid_bitmap, lm->sec_per_line,
-								bit + 1);
-		if (bit > line->emeta_ssec)
-			break;
-
-		gc_rq->paddr_list[nr_secs] = bit;
-		gc_rq->lba_list[nr_secs++] = le64_to_cpu(lba_list[bit]);
-	} while (nr_secs < pblk->max_write_pgs);
-
-	if (unlikely(!nr_secs)) {
-		kfree(gc_rq);
-		goto out;
-	}
-
-	gc_rq->nr_secs = nr_secs;
-	gc_rq->line = line;
-
-	gc_rq->data = vmalloc(array_size(gc_rq->nr_secs, geo->csecs));
-	if (!gc_rq->data)
-		goto fail_free_gc_rq;
-
-	gc_rq_ws = kmalloc(sizeof(struct pblk_line_ws), GFP_KERNEL);
-	if (!gc_rq_ws)
-		goto fail_free_gc_data;
-
-	gc_rq_ws->pblk = pblk;
-	gc_rq_ws->line = line;
-	gc_rq_ws->priv = gc_rq;
-
-	/* The write GC path can be much slower than the read GC one due to
-	 * the budget imposed by the rate-limiter. Balance in case that we get
-	 * back pressure from the write GC path.
-	 */
-	while (down_timeout(&gc->gc_sem, msecs_to_jiffies(30000)))
-		io_schedule();
-
-	kref_get(&line->ref);
-
-	INIT_WORK(&gc_rq_ws->ws, pblk_gc_line_ws);
-	queue_work(gc->gc_line_reader_wq, &gc_rq_ws->ws);
-
-	sec_left -= nr_secs;
-	if (sec_left > 0)
-		goto next_rq;
-
-out:
-	kvfree(lba_list);
-	kfree(line_ws);
-	kfree(invalid_bitmap);
-
-	kref_put(&line->ref, pblk_line_put);
-	atomic_dec(&gc->read_inflight_gc);
-
-	return;
-
-fail_free_gc_data:
-	vfree(gc_rq->data);
-fail_free_gc_rq:
-	kfree(gc_rq);
-fail_free_lba_list:
-	kvfree(lba_list);
-fail_free_invalid_bitmap:
-	kfree(invalid_bitmap);
-fail_free_ws:
-	kfree(line_ws);
-
-	/* Line goes back to closed state, so we cannot release additional
-	 * reference for line, since we do that only when we want to do
-	 * gc to free line state transition.
-	 */
-	pblk_put_line_back(pblk, line);
-	atomic_dec(&gc->read_inflight_gc);
-
-	pblk_err(pblk, "failed to GC line %d\n", line->id);
-}
-
-static int pblk_gc_line(struct pblk *pblk, struct pblk_line *line)
-{
-	struct pblk_gc *gc = &pblk->gc;
-	struct pblk_line_ws *line_ws;
-
-	pblk_debug(pblk, "line '%d' being reclaimed for GC\n", line->id);
-
-	line_ws = kmalloc(sizeof(struct pblk_line_ws), GFP_KERNEL);
-	if (!line_ws)
-		return -ENOMEM;
-
-	line_ws->pblk = pblk;
-	line_ws->line = line;
-
-	atomic_inc(&gc->pipeline_gc);
-	INIT_WORK(&line_ws->ws, pblk_gc_line_prepare_ws);
-	queue_work(gc->gc_reader_wq, &line_ws->ws);
-
-	return 0;
-}
-
-static void pblk_gc_reader_kick(struct pblk_gc *gc)
-{
-	wake_up_process(gc->gc_reader_ts);
-}
-
-static void pblk_gc_kick(struct pblk *pblk)
-{
-	struct pblk_gc *gc = &pblk->gc;
-
-	pblk_gc_writer_kick(gc);
-	pblk_gc_reader_kick(gc);
-
-	/* If we're shutting down GC, let's not start it up again */
-	if (gc->gc_enabled) {
-		wake_up_process(gc->gc_ts);
-		mod_timer(&gc->gc_timer,
-			  jiffies + msecs_to_jiffies(GC_TIME_MSECS));
-	}
-}
-
-static int pblk_gc_read(struct pblk *pblk)
-{
-	struct pblk_gc *gc = &pblk->gc;
-	struct pblk_line *line;
-
-	spin_lock(&gc->r_lock);
-	if (list_empty(&gc->r_list)) {
-		spin_unlock(&gc->r_lock);
-		return 1;
-	}
-
-	line = list_first_entry(&gc->r_list, struct pblk_line, list);
-	list_del(&line->list);
-	spin_unlock(&gc->r_lock);
-
-	pblk_gc_kick(pblk);
-
-	if (pblk_gc_line(pblk, line)) {
-		pblk_err(pblk, "failed to GC line %d\n", line->id);
-		/* rollback */
-		spin_lock(&gc->r_lock);
-		list_add_tail(&line->list, &gc->r_list);
-		spin_unlock(&gc->r_lock);
-	}
-
-	return 0;
-}
-
-static struct pblk_line *pblk_gc_get_victim_line(struct pblk *pblk,
-						 struct list_head *group_list)
-{
-	struct pblk_line *line, *victim;
-	unsigned int line_vsc = ~0x0L, victim_vsc = ~0x0L;
-
-	victim = list_first_entry(group_list, struct pblk_line, list);
-
-	list_for_each_entry(line, group_list, list) {
-		if (!atomic_read(&line->sec_to_update))
-			line_vsc = le32_to_cpu(*line->vsc);
-		if (line_vsc < victim_vsc) {
-			victim = line;
-			victim_vsc = le32_to_cpu(*victim->vsc);
-		}
-	}
-
-	if (victim_vsc == ~0x0)
-		return NULL;
-
-	return victim;
-}
-
-static bool pblk_gc_should_run(struct pblk_gc *gc, struct pblk_rl *rl)
-{
-	unsigned int nr_blocks_free, nr_blocks_need;
-	unsigned int werr_lines = atomic_read(&rl->werr_lines);
-
-	nr_blocks_need = pblk_rl_high_thrs(rl);
-	nr_blocks_free = pblk_rl_nr_free_blks(rl);
-
-	/* This is not critical, no need to take lock here */
-	return ((werr_lines > 0) ||
-		((gc->gc_active) && (nr_blocks_need > nr_blocks_free)));
-}
-
-void pblk_gc_free_full_lines(struct pblk *pblk)
-{
-	struct pblk_line_mgmt *l_mg = &pblk->l_mg;
-	struct pblk_gc *gc = &pblk->gc;
-	struct pblk_line *line;
-
-	do {
-		spin_lock(&l_mg->gc_lock);
-		if (list_empty(&l_mg->gc_full_list)) {
-			spin_unlock(&l_mg->gc_lock);
-			return;
-		}
-
-		line = list_first_entry(&l_mg->gc_full_list,
-							struct pblk_line, list);
-
-		spin_lock(&line->lock);
-		WARN_ON(line->state != PBLK_LINESTATE_CLOSED);
-		line->state = PBLK_LINESTATE_GC;
-		trace_pblk_line_state(pblk_disk_name(pblk), line->id,
-					line->state);
-		spin_unlock(&line->lock);
-
-		list_del(&line->list);
-		spin_unlock(&l_mg->gc_lock);
-
-		atomic_inc(&gc->pipeline_gc);
-		kref_put(&line->ref, pblk_line_put);
-	} while (1);
-}
-
-/*
- * Lines with no valid sectors will be returned to the free list immediately. If
- * GC is activated - either because the free block count is under the determined
- * threshold, or because it is being forced from user space - only lines with a
- * high count of invalid sectors will be recycled.
- */
-static void pblk_gc_run(struct pblk *pblk)
-{
-	struct pblk_line_mgmt *l_mg = &pblk->l_mg;
-	struct pblk_gc *gc = &pblk->gc;
-	struct pblk_line *line;
-	struct list_head *group_list;
-	bool run_gc;
-	int read_inflight_gc, gc_group = 0, prev_group = 0;
-
-	pblk_gc_free_full_lines(pblk);
-
-	run_gc = pblk_gc_should_run(&pblk->gc, &pblk->rl);
-	if (!run_gc || (atomic_read(&gc->read_inflight_gc) >= PBLK_GC_L_QD))
-		return;
-
-next_gc_group:
-	group_list = l_mg->gc_lists[gc_group++];
-
-	do {
-		spin_lock(&l_mg->gc_lock);
-
-		line = pblk_gc_get_victim_line(pblk, group_list);
-		if (!line) {
-			spin_unlock(&l_mg->gc_lock);
-			break;
-		}
-
-		spin_lock(&line->lock);
-		WARN_ON(line->state != PBLK_LINESTATE_CLOSED);
-		line->state = PBLK_LINESTATE_GC;
-		trace_pblk_line_state(pblk_disk_name(pblk), line->id,
-					line->state);
-		spin_unlock(&line->lock);
-
-		list_del(&line->list);
-		spin_unlock(&l_mg->gc_lock);
-
-		spin_lock(&gc->r_lock);
-		list_add_tail(&line->list, &gc->r_list);
-		spin_unlock(&gc->r_lock);
-
-		read_inflight_gc = atomic_inc_return(&gc->read_inflight_gc);
-		pblk_gc_reader_kick(gc);
-
-		prev_group = 1;
-
-		/* No need to queue up more GC lines than we can handle */
-		run_gc = pblk_gc_should_run(&pblk->gc, &pblk->rl);
-		if (!run_gc || read_inflight_gc >= PBLK_GC_L_QD)
-			break;
-	} while (1);
-
-	if (!prev_group && pblk->rl.rb_state > gc_group &&
-						gc_group < PBLK_GC_NR_LISTS)
-		goto next_gc_group;
-}
-
-static void pblk_gc_timer(struct timer_list *t)
-{
-	struct pblk *pblk = from_timer(pblk, t, gc.gc_timer);
-
-	pblk_gc_kick(pblk);
-}
-
-static int pblk_gc_ts(void *data)
-{
-	struct pblk *pblk = data;
-
-	while (!kthread_should_stop()) {
-		pblk_gc_run(pblk);
-		set_current_state(TASK_INTERRUPTIBLE);
-		io_schedule();
-	}
-
-	return 0;
-}
-
-static int pblk_gc_writer_ts(void *data)
-{
-	struct pblk *pblk = data;
-
-	while (!kthread_should_stop()) {
-		if (!pblk_gc_write(pblk))
-			continue;
-		set_current_state(TASK_INTERRUPTIBLE);
-		io_schedule();
-	}
-
-	return 0;
-}
-
-static int pblk_gc_reader_ts(void *data)
-{
-	struct pblk *pblk = data;
-	struct pblk_gc *gc = &pblk->gc;
-
-	while (!kthread_should_stop()) {
-		if (!pblk_gc_read(pblk))
-			continue;
-		set_current_state(TASK_INTERRUPTIBLE);
-		io_schedule();
-	}
-
-#ifdef CONFIG_NVM_PBLK_DEBUG
-	pblk_info(pblk, "flushing gc pipeline, %d lines left\n",
-		atomic_read(&gc->pipeline_gc));
-#endif
-
-	do {
-		if (!atomic_read(&gc->pipeline_gc))
-			break;
-
-		schedule();
-	} while (1);
-
-	return 0;
-}
-
-static void pblk_gc_start(struct pblk *pblk)
-{
-	pblk->gc.gc_active = 1;
-	pblk_debug(pblk, "gc start\n");
-}
-
-void pblk_gc_should_start(struct pblk *pblk)
-{
-	struct pblk_gc *gc = &pblk->gc;
-
-	if (gc->gc_enabled && !gc->gc_active) {
-		pblk_gc_start(pblk);
-		pblk_gc_kick(pblk);
-	}
-}
-
-void pblk_gc_should_stop(struct pblk *pblk)
-{
-	struct pblk_gc *gc = &pblk->gc;
-
-	if (gc->gc_active && !gc->gc_forced)
-		gc->gc_active = 0;
-}
-
-void pblk_gc_should_kick(struct pblk *pblk)
-{
-	pblk_rl_update_rates(&pblk->rl);
-}
-
-void pblk_gc_sysfs_state_show(struct pblk *pblk, int *gc_enabled,
-			      int *gc_active)
-{
-	struct pblk_gc *gc = &pblk->gc;
-
-	spin_lock(&gc->lock);
-	*gc_enabled = gc->gc_enabled;
-	*gc_active = gc->gc_active;
-	spin_unlock(&gc->lock);
-}
-
-int pblk_gc_sysfs_force(struct pblk *pblk, int force)
-{
-	struct pblk_gc *gc = &pblk->gc;
-
-	if (force < 0 || force > 1)
-		return -EINVAL;
-
-	spin_lock(&gc->lock);
-	gc->gc_forced = force;
-
-	if (force)
-		gc->gc_enabled = 1;
-	else
-		gc->gc_enabled = 0;
-	spin_unlock(&gc->lock);
-
-	pblk_gc_should_start(pblk);
-
-	return 0;
-}
-
-int pblk_gc_init(struct pblk *pblk)
-{
-	struct pblk_gc *gc = &pblk->gc;
-	int ret;
-
-	gc->gc_ts = kthread_create(pblk_gc_ts, pblk, "pblk-gc-ts");
-	if (IS_ERR(gc->gc_ts)) {
-		pblk_err(pblk, "could not allocate GC main kthread\n");
-		return PTR_ERR(gc->gc_ts);
-	}
-
-	gc->gc_writer_ts = kthread_create(pblk_gc_writer_ts, pblk,
-							"pblk-gc-writer-ts");
-	if (IS_ERR(gc->gc_writer_ts)) {
-		pblk_err(pblk, "could not allocate GC writer kthread\n");
-		ret = PTR_ERR(gc->gc_writer_ts);
-		goto fail_free_main_kthread;
-	}
-
-	gc->gc_reader_ts = kthread_create(pblk_gc_reader_ts, pblk,
-							"pblk-gc-reader-ts");
-	if (IS_ERR(gc->gc_reader_ts)) {
-		pblk_err(pblk, "could not allocate GC reader kthread\n");
-		ret = PTR_ERR(gc->gc_reader_ts);
-		goto fail_free_writer_kthread;
-	}
-
-	timer_setup(&gc->gc_timer, pblk_gc_timer, 0);
-	mod_timer(&gc->gc_timer, jiffies + msecs_to_jiffies(GC_TIME_MSECS));
-
-	gc->gc_active = 0;
-	gc->gc_forced = 0;
-	gc->gc_enabled = 1;
-	gc->w_entries = 0;
-	atomic_set(&gc->read_inflight_gc, 0);
-	atomic_set(&gc->pipeline_gc, 0);
-
-	/* Workqueue that reads valid sectors from a line and submit them to the
-	 * GC writer to be recycled.
-	 */
-	gc->gc_line_reader_wq = alloc_workqueue("pblk-gc-line-reader-wq",
-			WQ_MEM_RECLAIM | WQ_UNBOUND, PBLK_GC_MAX_READERS);
-	if (!gc->gc_line_reader_wq) {
-		pblk_err(pblk, "could not allocate GC line reader workqueue\n");
-		ret = -ENOMEM;
-		goto fail_free_reader_kthread;
-	}
-
-	/* Workqueue that prepare lines for GC */
-	gc->gc_reader_wq = alloc_workqueue("pblk-gc-line_wq",
-					WQ_MEM_RECLAIM | WQ_UNBOUND, 1);
-	if (!gc->gc_reader_wq) {
-		pblk_err(pblk, "could not allocate GC reader workqueue\n");
-		ret = -ENOMEM;
-		goto fail_free_reader_line_wq;
-	}
-
-	spin_lock_init(&gc->lock);
-	spin_lock_init(&gc->w_lock);
-	spin_lock_init(&gc->r_lock);
-
-	sema_init(&gc->gc_sem, PBLK_GC_RQ_QD);
-
-	INIT_LIST_HEAD(&gc->w_list);
-	INIT_LIST_HEAD(&gc->r_list);
-
-	return 0;
-
-fail_free_reader_line_wq:
-	destroy_workqueue(gc->gc_line_reader_wq);
-fail_free_reader_kthread:
-	kthread_stop(gc->gc_reader_ts);
-fail_free_writer_kthread:
-	kthread_stop(gc->gc_writer_ts);
-fail_free_main_kthread:
-	kthread_stop(gc->gc_ts);
-
-	return ret;
-}
-
-void pblk_gc_exit(struct pblk *pblk, bool graceful)
-{
-	struct pblk_gc *gc = &pblk->gc;
-
-	gc->gc_enabled = 0;
-	del_timer_sync(&gc->gc_timer);
-	gc->gc_active = 0;
-
-	if (gc->gc_ts)
-		kthread_stop(gc->gc_ts);
-
-	if (gc->gc_reader_ts)
-		kthread_stop(gc->gc_reader_ts);
-
-	if (graceful) {
-		flush_workqueue(gc->gc_reader_wq);
-		flush_workqueue(gc->gc_line_reader_wq);
-	}
-
-	destroy_workqueue(gc->gc_reader_wq);
-	destroy_workqueue(gc->gc_line_reader_wq);
-
-	if (gc->gc_writer_ts)
-		kthread_stop(gc->gc_writer_ts);
-}
diff --git a/drivers/lightnvm/pblk-init.c b/drivers/lightnvm/pblk-init.c
deleted file mode 100644
index 5924f09c217b..000000000000
--- a/drivers/lightnvm/pblk-init.c
+++ /dev/null
@@ -1,1324 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright (C) 2015 IT University of Copenhagen (rrpc.c)
- * Copyright (C) 2016 CNEX Labs
- * Initial release: Javier Gonzalez <javier@cnexlabs.com>
- *                  Matias Bjorling <matias@cnexlabs.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License version
- * 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * Implementation of a physical block-device target for Open-channel SSDs.
- *
- * pblk-init.c - pblk's initialization.
- */
-
-#include "pblk.h"
-#include "pblk-trace.h"
-
-static unsigned int write_buffer_size;
-
-module_param(write_buffer_size, uint, 0644);
-MODULE_PARM_DESC(write_buffer_size, "number of entries in a write buffer");
-
-struct pblk_global_caches {
-	struct kmem_cache	*ws;
-	struct kmem_cache	*rec;
-	struct kmem_cache	*g_rq;
-	struct kmem_cache	*w_rq;
-
-	struct kref		kref;
-
-	struct mutex		mutex; /* Ensures consistency between
-					* caches and kref
-					*/
-};
-
-static struct pblk_global_caches pblk_caches = {
-	.mutex = __MUTEX_INITIALIZER(pblk_caches.mutex),
-	.kref = KREF_INIT(0),
-};
-
-struct bio_set pblk_bio_set;
-
-static blk_qc_t pblk_submit_bio(struct bio *bio)
-{
-	struct pblk *pblk = bio->bi_bdev->bd_disk->queue->queuedata;
-
-	if (bio_op(bio) == REQ_OP_DISCARD) {
-		pblk_discard(pblk, bio);
-		if (!(bio->bi_opf & REQ_PREFLUSH)) {
-			bio_endio(bio);
-			return BLK_QC_T_NONE;
-		}
-	}
-
-	/* Read requests must be <= 256kb due to NVMe's 64 bit completion bitmap
-	 * constraint. Writes can be of arbitrary size.
-	 */
-	if (bio_data_dir(bio) == READ) {
-		blk_queue_split(&bio);
-		pblk_submit_read(pblk, bio);
-	} else {
-		/* Prevent deadlock in the case of a modest LUN configuration
-		 * and large user I/Os. Unless stalled, the rate limiter
-		 * leaves at least 256KB available for user I/O.
-		 */
-		if (pblk_get_secs(bio) > pblk_rl_max_io(&pblk->rl))
-			blk_queue_split(&bio);
-
-		pblk_write_to_cache(pblk, bio, PBLK_IOTYPE_USER);
-	}
-
-	return BLK_QC_T_NONE;
-}
-
-static const struct block_device_operations pblk_bops = {
-	.owner		= THIS_MODULE,
-	.submit_bio	= pblk_submit_bio,
-};
-
-
-static size_t pblk_trans_map_size(struct pblk *pblk)
-{
-	int entry_size = 8;
-
-	if (pblk->addrf_len < 32)
-		entry_size = 4;
-
-	return entry_size * pblk->capacity;
-}
-
-#ifdef CONFIG_NVM_PBLK_DEBUG
-static u32 pblk_l2p_crc(struct pblk *pblk)
-{
-	size_t map_size;
-	u32 crc = ~(u32)0;
-
-	map_size = pblk_trans_map_size(pblk);
-	crc = crc32_le(crc, pblk->trans_map, map_size);
-	return crc;
-}
-#endif
-
-static void pblk_l2p_free(struct pblk *pblk)
-{
-	vfree(pblk->trans_map);
-}
-
-static int pblk_l2p_recover(struct pblk *pblk, bool factory_init)
-{
-	struct pblk_line *line = NULL;
-
-	if (factory_init) {
-		guid_gen(&pblk->instance_uuid);
-	} else {
-		line = pblk_recov_l2p(pblk);
-		if (IS_ERR(line)) {
-			pblk_err(pblk, "could not recover l2p table\n");
-			return -EFAULT;
-		}
-	}
-
-#ifdef CONFIG_NVM_PBLK_DEBUG
-	pblk_info(pblk, "init: L2P CRC: %x\n", pblk_l2p_crc(pblk));
-#endif
-
-	/* Free full lines directly as GC has not been started yet */
-	pblk_gc_free_full_lines(pblk);
-
-	if (!line) {
-		/* Configure next line for user data */
-		line = pblk_line_get_first_data(pblk);
-		if (!line)
-			return -EFAULT;
-	}
-
-	return 0;
-}
-
-static int pblk_l2p_init(struct pblk *pblk, bool factory_init)
-{
-	sector_t i;
-	struct ppa_addr ppa;
-	size_t map_size;
-	int ret = 0;
-
-	map_size = pblk_trans_map_size(pblk);
-	pblk->trans_map = __vmalloc(map_size, GFP_KERNEL | __GFP_NOWARN |
-				    __GFP_RETRY_MAYFAIL | __GFP_HIGHMEM);
-	if (!pblk->trans_map) {
-		pblk_err(pblk, "failed to allocate L2P (need %zu of memory)\n",
-				map_size);
-		return -ENOMEM;
-	}
-
-	pblk_ppa_set_empty(&ppa);
-
-	for (i = 0; i < pblk->capacity; i++)
-		pblk_trans_map_set(pblk, i, ppa);
-
-	ret = pblk_l2p_recover(pblk, factory_init);
-	if (ret)
-		vfree(pblk->trans_map);
-
-	return ret;
-}
-
-static void pblk_rwb_free(struct pblk *pblk)
-{
-	if (pblk_rb_tear_down_check(&pblk->rwb))
-		pblk_err(pblk, "write buffer error on tear down\n");
-
-	pblk_rb_free(&pblk->rwb);
-}
-
-static int pblk_rwb_init(struct pblk *pblk)
-{
-	struct nvm_tgt_dev *dev = pblk->dev;
-	struct nvm_geo *geo = &dev->geo;
-	unsigned long buffer_size;
-	int pgs_in_buffer, threshold;
-
-	threshold = geo->mw_cunits * geo->all_luns;
-	pgs_in_buffer = (max(geo->mw_cunits, geo->ws_opt) + geo->ws_opt)
-								* geo->all_luns;
-
-	if (write_buffer_size && (write_buffer_size > pgs_in_buffer))
-		buffer_size = write_buffer_size;
-	else
-		buffer_size = pgs_in_buffer;
-
-	return pblk_rb_init(&pblk->rwb, buffer_size, threshold, geo->csecs);
-}
-
-static int pblk_set_addrf_12(struct pblk *pblk, struct nvm_geo *geo,
-			     struct nvm_addrf_12 *dst)
-{
-	struct nvm_addrf_12 *src = (struct nvm_addrf_12 *)&geo->addrf;
-	int power_len;
-
-	/* Re-calculate channel and lun format to adapt to configuration */
-	power_len = get_count_order(geo->num_ch);
-	if (1 << power_len != geo->num_ch) {
-		pblk_err(pblk, "supports only power-of-two channel config.\n");
-		return -EINVAL;
-	}
-	dst->ch_len = power_len;
-
-	power_len = get_count_order(geo->num_lun);
-	if (1 << power_len != geo->num_lun) {
-		pblk_err(pblk, "supports only power-of-two LUN config.\n");
-		return -EINVAL;
-	}
-	dst->lun_len = power_len;
-
-	dst->blk_len = src->blk_len;
-	dst->pg_len = src->pg_len;
-	dst->pln_len = src->pln_len;
-	dst->sec_len = src->sec_len;
-
-	dst->sec_offset = 0;
-	dst->pln_offset = dst->sec_len;
-	dst->ch_offset = dst->pln_offset + dst->pln_len;
-	dst->lun_offset = dst->ch_offset + dst->ch_len;
-	dst->pg_offset = dst->lun_offset + dst->lun_len;
-	dst->blk_offset = dst->pg_offset + dst->pg_len;
-
-	dst->sec_mask = ((1ULL << dst->sec_len) - 1) << dst->sec_offset;
-	dst->pln_mask = ((1ULL << dst->pln_len) - 1) << dst->pln_offset;
-	dst->ch_mask = ((1ULL << dst->ch_len) - 1) << dst->ch_offset;
-	dst->lun_mask = ((1ULL << dst->lun_len) - 1) << dst->lun_offset;
-	dst->pg_mask = ((1ULL << dst->pg_len) - 1) << dst->pg_offset;
-	dst->blk_mask = ((1ULL << dst->blk_len) - 1) << dst->blk_offset;
-
-	return dst->blk_offset + src->blk_len;
-}
-
-static int pblk_set_addrf_20(struct nvm_geo *geo, struct nvm_addrf *adst,
-			     struct pblk_addrf *udst)
-{
-	struct nvm_addrf *src = &geo->addrf;
-
-	adst->ch_len = get_count_order(geo->num_ch);
-	adst->lun_len = get_count_order(geo->num_lun);
-	adst->chk_len = src->chk_len;
-	adst->sec_len = src->sec_len;
-
-	adst->sec_offset = 0;
-	adst->ch_offset = adst->sec_len;
-	adst->lun_offset = adst->ch_offset + adst->ch_len;
-	adst->chk_offset = adst->lun_offset + adst->lun_len;
-
-	adst->sec_mask = ((1ULL << adst->sec_len) - 1) << adst->sec_offset;
-	adst->chk_mask = ((1ULL << adst->chk_len) - 1) << adst->chk_offset;
-	adst->lun_mask = ((1ULL << adst->lun_len) - 1) << adst->lun_offset;
-	adst->ch_mask = ((1ULL << adst->ch_len) - 1) << adst->ch_offset;
-
-	udst->sec_stripe = geo->ws_opt;
-	udst->ch_stripe = geo->num_ch;
-	udst->lun_stripe = geo->num_lun;
-
-	udst->sec_lun_stripe = udst->sec_stripe * udst->ch_stripe;
-	udst->sec_ws_stripe = udst->sec_lun_stripe * udst->lun_stripe;
-
-	return adst->chk_offset + adst->chk_len;
-}
-
-static int pblk_set_addrf(struct pblk *pblk)
-{
-	struct nvm_tgt_dev *dev = pblk->dev;
-	struct nvm_geo *geo = &dev->geo;
-	int mod;
-
-	switch (geo->version) {
-	case NVM_OCSSD_SPEC_12:
-		div_u64_rem(geo->clba, pblk->min_write_pgs, &mod);
-		if (mod) {
-			pblk_err(pblk, "bad configuration of sectors/pages\n");
-			return -EINVAL;
-		}
-
-		pblk->addrf_len = pblk_set_addrf_12(pblk, geo,
-							(void *)&pblk->addrf);
-		break;
-	case NVM_OCSSD_SPEC_20:
-		pblk->addrf_len = pblk_set_addrf_20(geo, (void *)&pblk->addrf,
-							&pblk->uaddrf);
-		break;
-	default:
-		pblk_err(pblk, "OCSSD revision not supported (%d)\n",
-								geo->version);
-		return -EINVAL;
-	}
-
-	return 0;
-}
-
-static int pblk_create_global_caches(void)
-{
-
-	pblk_caches.ws = kmem_cache_create("pblk_blk_ws",
-				sizeof(struct pblk_line_ws), 0, 0, NULL);
-	if (!pblk_caches.ws)
-		return -ENOMEM;
-
-	pblk_caches.rec = kmem_cache_create("pblk_rec",
-				sizeof(struct pblk_rec_ctx), 0, 0, NULL);
-	if (!pblk_caches.rec)
-		goto fail_destroy_ws;
-
-	pblk_caches.g_rq = kmem_cache_create("pblk_g_rq", pblk_g_rq_size,
-				0, 0, NULL);
-	if (!pblk_caches.g_rq)
-		goto fail_destroy_rec;
-
-	pblk_caches.w_rq = kmem_cache_create("pblk_w_rq", pblk_w_rq_size,
-				0, 0, NULL);
-	if (!pblk_caches.w_rq)
-		goto fail_destroy_g_rq;
-
-	return 0;
-
-fail_destroy_g_rq:
-	kmem_cache_destroy(pblk_caches.g_rq);
-fail_destroy_rec:
-	kmem_cache_destroy(pblk_caches.rec);
-fail_destroy_ws:
-	kmem_cache_destroy(pblk_caches.ws);
-
-	return -ENOMEM;
-}
-
-static int pblk_get_global_caches(void)
-{
-	int ret = 0;
-
-	mutex_lock(&pblk_caches.mutex);
-
-	if (kref_get_unless_zero(&pblk_caches.kref))
-		goto out;
-
-	ret = pblk_create_global_caches();
-	if (!ret)
-		kref_init(&pblk_caches.kref);
-
-out:
-	mutex_unlock(&pblk_caches.mutex);
-	return ret;
-}
-
-static void pblk_destroy_global_caches(struct kref *ref)
-{
-	struct pblk_global_caches *c;
-
-	c = container_of(ref, struct pblk_global_caches, kref);
-
-	kmem_cache_destroy(c->ws);
-	kmem_cache_destroy(c->rec);
-	kmem_cache_destroy(c->g_rq);
-	kmem_cache_destroy(c->w_rq);
-}
-
-static void pblk_put_global_caches(void)
-{
-	mutex_lock(&pblk_caches.mutex);
-	kref_put(&pblk_caches.kref, pblk_destroy_global_caches);
-	mutex_unlock(&pblk_caches.mutex);
-}
-
-static int pblk_core_init(struct pblk *pblk)
-{
-	struct nvm_tgt_dev *dev = pblk->dev;
-	struct nvm_geo *geo = &dev->geo;
-	int ret, max_write_ppas;
-
-	atomic64_set(&pblk->user_wa, 0);
-	atomic64_set(&pblk->pad_wa, 0);
-	atomic64_set(&pblk->gc_wa, 0);
-	pblk->user_rst_wa = 0;
-	pblk->pad_rst_wa = 0;
-	pblk->gc_rst_wa = 0;
-
-	atomic64_set(&pblk->nr_flush, 0);
-	pblk->nr_flush_rst = 0;
-
-	pblk->min_write_pgs = geo->ws_opt;
-	pblk->min_write_pgs_data = pblk->min_write_pgs;
-	max_write_ppas = pblk->min_write_pgs * geo->all_luns;
-	pblk->max_write_pgs = min_t(int, max_write_ppas, NVM_MAX_VLBA);
-	pblk->max_write_pgs = min_t(int, pblk->max_write_pgs,
-		queue_max_hw_sectors(dev->q) / (geo->csecs >> SECTOR_SHIFT));
-	pblk_set_sec_per_write(pblk, pblk->min_write_pgs);
-
-	pblk->oob_meta_size = geo->sos;
-	if (!pblk_is_oob_meta_supported(pblk)) {
-		/* For drives which does not have OOB metadata feature
-		 * in order to support recovery feature we need to use
-		 * so called packed metadata. Packed metada will store
-		 * the same information as OOB metadata (l2p table mapping,
-		 * but in the form of the single page at the end of
-		 * every write request.
-		 */
-		if (pblk->min_write_pgs
-			* sizeof(struct pblk_sec_meta) > PAGE_SIZE) {
-			/* We want to keep all the packed metadata on single
-			 * page per write requests. So we need to ensure that
-			 * it will fit.
-			 *
-			 * This is more like sanity check, since there is
-			 * no device with such a big minimal write size
-			 * (above 1 metabytes).
-			 */
-			pblk_err(pblk, "Not supported min write size\n");
-			return -EINVAL;
-		}
-		/* For packed meta approach we do some simplification.
-		 * On read path we always issue requests which size
-		 * equal to max_write_pgs, with all pages filled with
-		 * user payload except of last one page which will be
-		 * filled with packed metadata.
-		 */
-		pblk->max_write_pgs = pblk->min_write_pgs;
-		pblk->min_write_pgs_data = pblk->min_write_pgs - 1;
-	}
-
-	pblk->pad_dist = kcalloc(pblk->min_write_pgs - 1, sizeof(atomic64_t),
-								GFP_KERNEL);
-	if (!pblk->pad_dist)
-		return -ENOMEM;
-
-	if (pblk_get_global_caches())
-		goto fail_free_pad_dist;
-
-	/* Internal bios can be at most the sectors signaled by the device. */
-	ret = mempool_init_page_pool(&pblk->page_bio_pool, NVM_MAX_VLBA, 0);
-	if (ret)
-		goto free_global_caches;
-
-	ret = mempool_init_slab_pool(&pblk->gen_ws_pool, PBLK_GEN_WS_POOL_SIZE,
-				     pblk_caches.ws);
-	if (ret)
-		goto free_page_bio_pool;
-
-	ret = mempool_init_slab_pool(&pblk->rec_pool, geo->all_luns,
-				     pblk_caches.rec);
-	if (ret)
-		goto free_gen_ws_pool;
-
-	ret = mempool_init_slab_pool(&pblk->r_rq_pool, geo->all_luns,
-				     pblk_caches.g_rq);
-	if (ret)
-		goto free_rec_pool;
-
-	ret = mempool_init_slab_pool(&pblk->e_rq_pool, geo->all_luns,
-				     pblk_caches.g_rq);
-	if (ret)
-		goto free_r_rq_pool;
-
-	ret = mempool_init_slab_pool(&pblk->w_rq_pool, geo->all_luns,
-				     pblk_caches.w_rq);
-	if (ret)
-		goto free_e_rq_pool;
-
-	pblk->close_wq = alloc_workqueue("pblk-close-wq",
-			WQ_MEM_RECLAIM | WQ_UNBOUND, PBLK_NR_CLOSE_JOBS);
-	if (!pblk->close_wq)
-		goto free_w_rq_pool;
-
-	pblk->bb_wq = alloc_workqueue("pblk-bb-wq",
-			WQ_MEM_RECLAIM | WQ_UNBOUND, 0);
-	if (!pblk->bb_wq)
-		goto free_close_wq;
-
-	pblk->r_end_wq = alloc_workqueue("pblk-read-end-wq",
-			WQ_MEM_RECLAIM | WQ_UNBOUND, 0);
-	if (!pblk->r_end_wq)
-		goto free_bb_wq;
-
-	if (pblk_set_addrf(pblk))
-		goto free_r_end_wq;
-
-	INIT_LIST_HEAD(&pblk->compl_list);
-	INIT_LIST_HEAD(&pblk->resubmit_list);
-
-	return 0;
-
-free_r_end_wq:
-	destroy_workqueue(pblk->r_end_wq);
-free_bb_wq:
-	destroy_workqueue(pblk->bb_wq);
-free_close_wq:
-	destroy_workqueue(pblk->close_wq);
-free_w_rq_pool:
-	mempool_exit(&pblk->w_rq_pool);
-free_e_rq_pool:
-	mempool_exit(&pblk->e_rq_pool);
-free_r_rq_pool:
-	mempool_exit(&pblk->r_rq_pool);
-free_rec_pool:
-	mempool_exit(&pblk->rec_pool);
-free_gen_ws_pool:
-	mempool_exit(&pblk->gen_ws_pool);
-free_page_bio_pool:
-	mempool_exit(&pblk->page_bio_pool);
-free_global_caches:
-	pblk_put_global_caches();
-fail_free_pad_dist:
-	kfree(pblk->pad_dist);
-	return -ENOMEM;
-}
-
-static void pblk_core_free(struct pblk *pblk)
-{
-	if (pblk->close_wq)
-		destroy_workqueue(pblk->close_wq);
-
-	if (pblk->r_end_wq)
-		destroy_workqueue(pblk->r_end_wq);
-
-	if (pblk->bb_wq)
-		destroy_workqueue(pblk->bb_wq);
-
-	mempool_exit(&pblk->page_bio_pool);
-	mempool_exit(&pblk->gen_ws_pool);
-	mempool_exit(&pblk->rec_pool);
-	mempool_exit(&pblk->r_rq_pool);
-	mempool_exit(&pblk->e_rq_pool);
-	mempool_exit(&pblk->w_rq_pool);
-
-	pblk_put_global_caches();
-	kfree(pblk->pad_dist);
-}
-
-static void pblk_line_mg_free(struct pblk *pblk)
-{
-	struct pblk_line_mgmt *l_mg = &pblk->l_mg;
-	int i;
-
-	kfree(l_mg->bb_template);
-	kfree(l_mg->bb_aux);
-	kfree(l_mg->vsc_list);
-
-	for (i = 0; i < PBLK_DATA_LINES; i++) {
-		kfree(l_mg->sline_meta[i]);
-		kvfree(l_mg->eline_meta[i]->buf);
-		kfree(l_mg->eline_meta[i]);
-	}
-
-	mempool_destroy(l_mg->bitmap_pool);
-	kmem_cache_destroy(l_mg->bitmap_cache);
-}
-
-static void pblk_line_meta_free(struct pblk_line_mgmt *l_mg,
-				struct pblk_line *line)
-{
-	struct pblk_w_err_gc *w_err_gc = line->w_err_gc;
-
-	kfree(line->blk_bitmap);
-	kfree(line->erase_bitmap);
-	kfree(line->chks);
-
-	kvfree(w_err_gc->lba_list);
-	kfree(w_err_gc);
-}
-
-static void pblk_lines_free(struct pblk *pblk)
-{
-	struct pblk_line_mgmt *l_mg = &pblk->l_mg;
-	struct pblk_line *line;
-	int i;
-
-	for (i = 0; i < l_mg->nr_lines; i++) {
-		line = &pblk->lines[i];
-
-		pblk_line_free(line);
-		pblk_line_meta_free(l_mg, line);
-	}
-
-	pblk_line_mg_free(pblk);
-
-	kfree(pblk->luns);
-	kfree(pblk->lines);
-}
-
-static int pblk_luns_init(struct pblk *pblk)
-{
-	struct nvm_tgt_dev *dev = pblk->dev;
-	struct nvm_geo *geo = &dev->geo;
-	struct pblk_lun *rlun;
-	int i;
-
-	/* TODO: Implement unbalanced LUN support */
-	if (geo->num_lun < 0) {
-		pblk_err(pblk, "unbalanced LUN config.\n");
-		return -EINVAL;
-	}
-
-	pblk->luns = kcalloc(geo->all_luns, sizeof(struct pblk_lun),
-								GFP_KERNEL);
-	if (!pblk->luns)
-		return -ENOMEM;
-
-	for (i = 0; i < geo->all_luns; i++) {
-		/* Stripe across channels */
-		int ch = i % geo->num_ch;
-		int lun_raw = i / geo->num_ch;
-		int lunid = lun_raw + ch * geo->num_lun;
-
-		rlun = &pblk->luns[i];
-		rlun->bppa = dev->luns[lunid];
-
-		sema_init(&rlun->wr_sem, 1);
-	}
-
-	return 0;
-}
-
-/* See comment over struct line_emeta definition */
-static unsigned int calc_emeta_len(struct pblk *pblk)
-{
-	struct pblk_line_meta *lm = &pblk->lm;
-	struct pblk_line_mgmt *l_mg = &pblk->l_mg;
-	struct nvm_tgt_dev *dev = pblk->dev;
-	struct nvm_geo *geo = &dev->geo;
-
-	/* Round to sector size so that lba_list starts on its own sector */
-	lm->emeta_sec[1] = DIV_ROUND_UP(
-			sizeof(struct line_emeta) + lm->blk_bitmap_len +
-			sizeof(struct wa_counters), geo->csecs);
-	lm->emeta_len[1] = lm->emeta_sec[1] * geo->csecs;
-
-	/* Round to sector size so that vsc_list starts on its own sector */
-	lm->dsec_per_line = lm->sec_per_line - lm->emeta_sec[0];
-	lm->emeta_sec[2] = DIV_ROUND_UP(lm->dsec_per_line * sizeof(u64),
-			geo->csecs);
-	lm->emeta_len[2] = lm->emeta_sec[2] * geo->csecs;
-
-	lm->emeta_sec[3] = DIV_ROUND_UP(l_mg->nr_lines * sizeof(u32),
-			geo->csecs);
-	lm->emeta_len[3] = lm->emeta_sec[3] * geo->csecs;
-
-	lm->vsc_list_len = l_mg->nr_lines * sizeof(u32);
-
-	return (lm->emeta_len[1] + lm->emeta_len[2] + lm->emeta_len[3]);
-}
-
-static int pblk_set_provision(struct pblk *pblk, int nr_free_chks)
-{
-	struct nvm_tgt_dev *dev = pblk->dev;
-	struct pblk_line_mgmt *l_mg = &pblk->l_mg;
-	struct pblk_line_meta *lm = &pblk->lm;
-	struct nvm_geo *geo = &dev->geo;
-	sector_t provisioned;
-	int sec_meta, blk_meta, clba;
-	int minimum;
-
-	if (geo->op == NVM_TARGET_DEFAULT_OP)
-		pblk->op = PBLK_DEFAULT_OP;
-	else
-		pblk->op = geo->op;
-
-	minimum = pblk_get_min_chks(pblk);
-	provisioned = nr_free_chks;
-	provisioned *= (100 - pblk->op);
-	sector_div(provisioned, 100);
-
-	if ((nr_free_chks - provisioned) < minimum) {
-		if (geo->op != NVM_TARGET_DEFAULT_OP) {
-			pblk_err(pblk, "OP too small to create a sane instance\n");
-			return -EINTR;
-		}
-
-		/* If the user did not specify an OP value, and PBLK_DEFAULT_OP
-		 * is not enough, calculate and set sane value
-		 */
-
-		provisioned = nr_free_chks - minimum;
-		pblk->op =  (100 * minimum) / nr_free_chks;
-		pblk_info(pblk, "Default OP insufficient, adjusting OP to %d\n",
-				pblk->op);
-	}
-
-	pblk->op_blks = nr_free_chks - provisioned;
-
-	/* Internally pblk manages all free blocks, but all calculations based
-	 * on user capacity consider only provisioned blocks
-	 */
-	pblk->rl.total_blocks = nr_free_chks;
-
-	/* Consider sectors used for metadata */
-	sec_meta = (lm->smeta_sec + lm->emeta_sec[0]) * l_mg->nr_free_lines;
-	blk_meta = DIV_ROUND_UP(sec_meta, geo->clba);
-
-	clba = (geo->clba / pblk->min_write_pgs) * pblk->min_write_pgs_data;
-	pblk->capacity = (provisioned - blk_meta) * clba;
-
-	atomic_set(&pblk->rl.free_blocks, nr_free_chks);
-	atomic_set(&pblk->rl.free_user_blocks, nr_free_chks);
-
-	return 0;
-}
-
-static int pblk_setup_line_meta_chk(struct pblk *pblk, struct pblk_line *line,
-				   struct nvm_chk_meta *meta)
-{
-	struct nvm_tgt_dev *dev = pblk->dev;
-	struct nvm_geo *geo = &dev->geo;
-	struct pblk_line_meta *lm = &pblk->lm;
-	int i, nr_bad_chks = 0;
-
-	for (i = 0; i < lm->blk_per_line; i++) {
-		struct pblk_lun *rlun = &pblk->luns[i];
-		struct nvm_chk_meta *chunk;
-		struct nvm_chk_meta *chunk_meta;
-		struct ppa_addr ppa;
-		int pos;
-
-		ppa = rlun->bppa;
-		pos = pblk_ppa_to_pos(geo, ppa);
-		chunk = &line->chks[pos];
-
-		ppa.m.chk = line->id;
-		chunk_meta = pblk_chunk_get_off(pblk, meta, ppa);
-
-		chunk->state = chunk_meta->state;
-		chunk->type = chunk_meta->type;
-		chunk->wi = chunk_meta->wi;
-		chunk->slba = chunk_meta->slba;
-		chunk->cnlb = chunk_meta->cnlb;
-		chunk->wp = chunk_meta->wp;
-
-		trace_pblk_chunk_state(pblk_disk_name(pblk), &ppa,
-					chunk->state);
-
-		if (chunk->type & NVM_CHK_TP_SZ_SPEC) {
-			WARN_ONCE(1, "pblk: custom-sized chunks unsupported\n");
-			continue;
-		}
-
-		if (!(chunk->state & NVM_CHK_ST_OFFLINE))
-			continue;
-
-		set_bit(pos, line->blk_bitmap);
-		nr_bad_chks++;
-	}
-
-	return nr_bad_chks;
-}
-
-static long pblk_setup_line_meta(struct pblk *pblk, struct pblk_line *line,
-				 void *chunk_meta, int line_id)
-{
-	struct pblk_line_mgmt *l_mg = &pblk->l_mg;
-	struct pblk_line_meta *lm = &pblk->lm;
-	long nr_bad_chks, chk_in_line;
-
-	line->pblk = pblk;
-	line->id = line_id;
-	line->type = PBLK_LINETYPE_FREE;
-	line->state = PBLK_LINESTATE_NEW;
-	line->gc_group = PBLK_LINEGC_NONE;
-	line->vsc = &l_mg->vsc_list[line_id];
-	spin_lock_init(&line->lock);
-
-	nr_bad_chks = pblk_setup_line_meta_chk(pblk, line, chunk_meta);
-
-	chk_in_line = lm->blk_per_line - nr_bad_chks;
-	if (nr_bad_chks < 0 || nr_bad_chks > lm->blk_per_line ||
-					chk_in_line < lm->min_blk_line) {
-		line->state = PBLK_LINESTATE_BAD;
-		list_add_tail(&line->list, &l_mg->bad_list);
-		return 0;
-	}
-
-	atomic_set(&line->blk_in_line, chk_in_line);
-	list_add_tail(&line->list, &l_mg->free_list);
-	l_mg->nr_free_lines++;
-
-	return chk_in_line;
-}
-
-static int pblk_alloc_line_meta(struct pblk *pblk, struct pblk_line *line)
-{
-	struct pblk_line_meta *lm = &pblk->lm;
-
-	line->blk_bitmap = kzalloc(lm->blk_bitmap_len, GFP_KERNEL);
-	if (!line->blk_bitmap)
-		return -ENOMEM;
-
-	line->erase_bitmap = kzalloc(lm->blk_bitmap_len, GFP_KERNEL);
-	if (!line->erase_bitmap)
-		goto free_blk_bitmap;
-
-
-	line->chks = kmalloc_array(lm->blk_per_line,
-				   sizeof(struct nvm_chk_meta), GFP_KERNEL);
-	if (!line->chks)
-		goto free_erase_bitmap;
-
-	line->w_err_gc = kzalloc(sizeof(struct pblk_w_err_gc), GFP_KERNEL);
-	if (!line->w_err_gc)
-		goto free_chks;
-
-	return 0;
-
-free_chks:
-	kfree(line->chks);
-free_erase_bitmap:
-	kfree(line->erase_bitmap);
-free_blk_bitmap:
-	kfree(line->blk_bitmap);
-	return -ENOMEM;
-}
-
-static int pblk_line_mg_init(struct pblk *pblk)
-{
-	struct nvm_tgt_dev *dev = pblk->dev;
-	struct nvm_geo *geo = &dev->geo;
-	struct pblk_line_mgmt *l_mg = &pblk->l_mg;
-	struct pblk_line_meta *lm = &pblk->lm;
-	int i, bb_distance;
-
-	l_mg->nr_lines = geo->num_chk;
-	l_mg->log_line = l_mg->data_line = NULL;
-	l_mg->l_seq_nr = l_mg->d_seq_nr = 0;
-	l_mg->nr_free_lines = 0;
-	bitmap_zero(&l_mg->meta_bitmap, PBLK_DATA_LINES);
-
-	INIT_LIST_HEAD(&l_mg->free_list);
-	INIT_LIST_HEAD(&l_mg->corrupt_list);
-	INIT_LIST_HEAD(&l_mg->bad_list);
-	INIT_LIST_HEAD(&l_mg->gc_full_list);
-	INIT_LIST_HEAD(&l_mg->gc_high_list);
-	INIT_LIST_HEAD(&l_mg->gc_mid_list);
-	INIT_LIST_HEAD(&l_mg->gc_low_list);
-	INIT_LIST_HEAD(&l_mg->gc_empty_list);
-	INIT_LIST_HEAD(&l_mg->gc_werr_list);
-
-	INIT_LIST_HEAD(&l_mg->emeta_list);
-
-	l_mg->gc_lists[0] = &l_mg->gc_werr_list;
-	l_mg->gc_lists[1] = &l_mg->gc_high_list;
-	l_mg->gc_lists[2] = &l_mg->gc_mid_list;
-	l_mg->gc_lists[3] = &l_mg->gc_low_list;
-
-	spin_lock_init(&l_mg->free_lock);
-	spin_lock_init(&l_mg->close_lock);
-	spin_lock_init(&l_mg->gc_lock);
-
-	l_mg->vsc_list = kcalloc(l_mg->nr_lines, sizeof(__le32), GFP_KERNEL);
-	if (!l_mg->vsc_list)
-		goto fail;
-
-	l_mg->bb_template = kzalloc(lm->sec_bitmap_len, GFP_KERNEL);
-	if (!l_mg->bb_template)
-		goto fail_free_vsc_list;
-
-	l_mg->bb_aux = kzalloc(lm->sec_bitmap_len, GFP_KERNEL);
-	if (!l_mg->bb_aux)
-		goto fail_free_bb_template;
-
-	/* smeta is always small enough to fit on a kmalloc memory allocation,
-	 * emeta depends on the number of LUNs allocated to the pblk instance
-	 */
-	for (i = 0; i < PBLK_DATA_LINES; i++) {
-		l_mg->sline_meta[i] = kmalloc(lm->smeta_len, GFP_KERNEL);
-		if (!l_mg->sline_meta[i])
-			goto fail_free_smeta;
-	}
-
-	l_mg->bitmap_cache = kmem_cache_create("pblk_lm_bitmap",
-			lm->sec_bitmap_len, 0, 0, NULL);
-	if (!l_mg->bitmap_cache)
-		goto fail_free_smeta;
-
-	/* the bitmap pool is used for both valid and map bitmaps */
-	l_mg->bitmap_pool = mempool_create_slab_pool(PBLK_DATA_LINES * 2,
-				l_mg->bitmap_cache);
-	if (!l_mg->bitmap_pool)
-		goto fail_destroy_bitmap_cache;
-
-	/* emeta allocates three different buffers for managing metadata with
-	 * in-memory and in-media layouts
-	 */
-	for (i = 0; i < PBLK_DATA_LINES; i++) {
-		struct pblk_emeta *emeta;
-
-		emeta = kmalloc(sizeof(struct pblk_emeta), GFP_KERNEL);
-		if (!emeta)
-			goto fail_free_emeta;
-
-		emeta->buf = kvmalloc(lm->emeta_len[0], GFP_KERNEL);
-		if (!emeta->buf) {
-			kfree(emeta);
-			goto fail_free_emeta;
-		}
-
-		emeta->nr_entries = lm->emeta_sec[0];
-		l_mg->eline_meta[i] = emeta;
-	}
-
-	for (i = 0; i < l_mg->nr_lines; i++)
-		l_mg->vsc_list[i] = cpu_to_le32(EMPTY_ENTRY);
-
-	bb_distance = (geo->all_luns) * geo->ws_opt;
-	for (i = 0; i < lm->sec_per_line; i += bb_distance)
-		bitmap_set(l_mg->bb_template, i, geo->ws_opt);
-
-	return 0;
-
-fail_free_emeta:
-	while (--i >= 0) {
-		kvfree(l_mg->eline_meta[i]->buf);
-		kfree(l_mg->eline_meta[i]);
-	}
-
-	mempool_destroy(l_mg->bitmap_pool);
-fail_destroy_bitmap_cache:
-	kmem_cache_destroy(l_mg->bitmap_cache);
-fail_free_smeta:
-	for (i = 0; i < PBLK_DATA_LINES; i++)
-		kfree(l_mg->sline_meta[i]);
-	kfree(l_mg->bb_aux);
-fail_free_bb_template:
-	kfree(l_mg->bb_template);
-fail_free_vsc_list:
-	kfree(l_mg->vsc_list);
-fail:
-	return -ENOMEM;
-}
-
-static int pblk_line_meta_init(struct pblk *pblk)
-{
-	struct nvm_tgt_dev *dev = pblk->dev;
-	struct nvm_geo *geo = &dev->geo;
-	struct pblk_line_meta *lm = &pblk->lm;
-	unsigned int smeta_len, emeta_len;
-	int i;
-
-	lm->sec_per_line = geo->clba * geo->all_luns;
-	lm->blk_per_line = geo->all_luns;
-	lm->blk_bitmap_len = BITS_TO_LONGS(geo->all_luns) * sizeof(long);
-	lm->sec_bitmap_len = BITS_TO_LONGS(lm->sec_per_line) * sizeof(long);
-	lm->lun_bitmap_len = BITS_TO_LONGS(geo->all_luns) * sizeof(long);
-	lm->mid_thrs = lm->sec_per_line / 2;
-	lm->high_thrs = lm->sec_per_line / 4;
-	lm->meta_distance = (geo->all_luns / 2) * pblk->min_write_pgs;
-
-	/* Calculate necessary pages for smeta. See comment over struct
-	 * line_smeta definition
-	 */
-	i = 1;
-add_smeta_page:
-	lm->smeta_sec = i * geo->ws_opt;
-	lm->smeta_len = lm->smeta_sec * geo->csecs;
-
-	smeta_len = sizeof(struct line_smeta) + lm->lun_bitmap_len;
-	if (smeta_len > lm->smeta_len) {
-		i++;
-		goto add_smeta_page;
-	}
-
-	/* Calculate necessary pages for emeta. See comment over struct
-	 * line_emeta definition
-	 */
-	i = 1;
-add_emeta_page:
-	lm->emeta_sec[0] = i * geo->ws_opt;
-	lm->emeta_len[0] = lm->emeta_sec[0] * geo->csecs;
-
-	emeta_len = calc_emeta_len(pblk);
-	if (emeta_len > lm->emeta_len[0]) {
-		i++;
-		goto add_emeta_page;
-	}
-
-	lm->emeta_bb = geo->all_luns > i ? geo->all_luns - i : 0;
-
-	lm->min_blk_line = 1;
-	if (geo->all_luns > 1)
-		lm->min_blk_line += DIV_ROUND_UP(lm->smeta_sec +
-					lm->emeta_sec[0], geo->clba);
-
-	if (lm->min_blk_line > lm->blk_per_line) {
-		pblk_err(pblk, "config. not supported. Min. LUN in line:%d\n",
-							lm->blk_per_line);
-		return -EINVAL;
-	}
-
-	return 0;
-}
-
-static int pblk_lines_init(struct pblk *pblk)
-{
-	struct pblk_line_mgmt *l_mg = &pblk->l_mg;
-	struct pblk_line *line;
-	void *chunk_meta;
-	int nr_free_chks = 0;
-	int i, ret;
-
-	ret = pblk_line_meta_init(pblk);
-	if (ret)
-		return ret;
-
-	ret = pblk_line_mg_init(pblk);
-	if (ret)
-		return ret;
-
-	ret = pblk_luns_init(pblk);
-	if (ret)
-		goto fail_free_meta;
-
-	chunk_meta = pblk_get_chunk_meta(pblk);
-	if (IS_ERR(chunk_meta)) {
-		ret = PTR_ERR(chunk_meta);
-		goto fail_free_luns;
-	}
-
-	pblk->lines = kcalloc(l_mg->nr_lines, sizeof(struct pblk_line),
-								GFP_KERNEL);
-	if (!pblk->lines) {
-		ret = -ENOMEM;
-		goto fail_free_chunk_meta;
-	}
-
-	for (i = 0; i < l_mg->nr_lines; i++) {
-		line = &pblk->lines[i];
-
-		ret = pblk_alloc_line_meta(pblk, line);
-		if (ret)
-			goto fail_free_lines;
-
-		nr_free_chks += pblk_setup_line_meta(pblk, line, chunk_meta, i);
-
-		trace_pblk_line_state(pblk_disk_name(pblk), line->id,
-								line->state);
-	}
-
-	if (!nr_free_chks) {
-		pblk_err(pblk, "too many bad blocks prevent for sane instance\n");
-		ret = -EINTR;
-		goto fail_free_lines;
-	}
-
-	ret = pblk_set_provision(pblk, nr_free_chks);
-	if (ret)
-		goto fail_free_lines;
-
-	vfree(chunk_meta);
-	return 0;
-
-fail_free_lines:
-	while (--i >= 0)
-		pblk_line_meta_free(l_mg, &pblk->lines[i]);
-	kfree(pblk->lines);
-fail_free_chunk_meta:
-	vfree(chunk_meta);
-fail_free_luns:
-	kfree(pblk->luns);
-fail_free_meta:
-	pblk_line_mg_free(pblk);
-
-	return ret;
-}
-
-static int pblk_writer_init(struct pblk *pblk)
-{
-	pblk->writer_ts = kthread_create(pblk_write_ts, pblk, "pblk-writer-t");
-	if (IS_ERR(pblk->writer_ts)) {
-		int err = PTR_ERR(pblk->writer_ts);
-
-		if (err != -EINTR)
-			pblk_err(pblk, "could not allocate writer kthread (%d)\n",
-					err);
-		return err;
-	}
-
-	timer_setup(&pblk->wtimer, pblk_write_timer_fn, 0);
-	mod_timer(&pblk->wtimer, jiffies + msecs_to_jiffies(100));
-
-	return 0;
-}
-
-static void pblk_writer_stop(struct pblk *pblk)
-{
-	/* The pipeline must be stopped and the write buffer emptied before the
-	 * write thread is stopped
-	 */
-	WARN(pblk_rb_read_count(&pblk->rwb),
-			"Stopping not fully persisted write buffer\n");
-
-	WARN(pblk_rb_sync_count(&pblk->rwb),
-			"Stopping not fully synced write buffer\n");
-
-	del_timer_sync(&pblk->wtimer);
-	if (pblk->writer_ts)
-		kthread_stop(pblk->writer_ts);
-}
-
-static void pblk_free(struct pblk *pblk)
-{
-	pblk_lines_free(pblk);
-	pblk_l2p_free(pblk);
-	pblk_rwb_free(pblk);
-	pblk_core_free(pblk);
-
-	kfree(pblk);
-}
-
-static void pblk_tear_down(struct pblk *pblk, bool graceful)
-{
-	if (graceful)
-		__pblk_pipeline_flush(pblk);
-	__pblk_pipeline_stop(pblk);
-	pblk_writer_stop(pblk);
-	pblk_rb_sync_l2p(&pblk->rwb);
-	pblk_rl_free(&pblk->rl);
-
-	pblk_debug(pblk, "consistent tear down (graceful:%d)\n", graceful);
-}
-
-static void pblk_exit(void *private, bool graceful)
-{
-	struct pblk *pblk = private;
-
-	pblk_gc_exit(pblk, graceful);
-	pblk_tear_down(pblk, graceful);
-
-#ifdef CONFIG_NVM_PBLK_DEBUG
-	pblk_info(pblk, "exit: L2P CRC: %x\n", pblk_l2p_crc(pblk));
-#endif
-
-	pblk_free(pblk);
-}
-
-static sector_t pblk_capacity(void *private)
-{
-	struct pblk *pblk = private;
-
-	return pblk->capacity * NR_PHY_IN_LOG;
-}
-
-static void *pblk_init(struct nvm_tgt_dev *dev, struct gendisk *tdisk,
-		       int flags)
-{
-	struct nvm_geo *geo = &dev->geo;
-	struct request_queue *bqueue = dev->q;
-	struct request_queue *tqueue = tdisk->queue;
-	struct pblk *pblk;
-	int ret;
-
-	pblk = kzalloc(sizeof(struct pblk), GFP_KERNEL);
-	if (!pblk)
-		return ERR_PTR(-ENOMEM);
-
-	pblk->dev = dev;
-	pblk->disk = tdisk;
-	pblk->state = PBLK_STATE_RUNNING;
-	trace_pblk_state(pblk_disk_name(pblk), pblk->state);
-	pblk->gc.gc_enabled = 0;
-
-	if (!(geo->version == NVM_OCSSD_SPEC_12 ||
-					geo->version == NVM_OCSSD_SPEC_20)) {
-		pblk_err(pblk, "OCSSD version not supported (%u)\n",
-							geo->version);
-		kfree(pblk);
-		return ERR_PTR(-EINVAL);
-	}
-
-	if (geo->ext) {
-		pblk_err(pblk, "extended metadata not supported\n");
-		kfree(pblk);
-		return ERR_PTR(-EINVAL);
-	}
-
-	spin_lock_init(&pblk->resubmit_lock);
-	spin_lock_init(&pblk->trans_lock);
-	spin_lock_init(&pblk->lock);
-
-#ifdef CONFIG_NVM_PBLK_DEBUG
-	atomic_long_set(&pblk->inflight_writes, 0);
-	atomic_long_set(&pblk->padded_writes, 0);
-	atomic_long_set(&pblk->padded_wb, 0);
-	atomic_long_set(&pblk->req_writes, 0);
-	atomic_long_set(&pblk->sub_writes, 0);
-	atomic_long_set(&pblk->sync_writes, 0);
-	atomic_long_set(&pblk->inflight_reads, 0);
-	atomic_long_set(&pblk->cache_reads, 0);
-	atomic_long_set(&pblk->sync_reads, 0);
-	atomic_long_set(&pblk->recov_writes, 0);
-	atomic_long_set(&pblk->recov_writes, 0);
-	atomic_long_set(&pblk->recov_gc_writes, 0);
-	atomic_long_set(&pblk->recov_gc_reads, 0);
-#endif
-
-	atomic_long_set(&pblk->read_failed, 0);
-	atomic_long_set(&pblk->read_empty, 0);
-	atomic_long_set(&pblk->read_high_ecc, 0);
-	atomic_long_set(&pblk->read_failed_gc, 0);
-	atomic_long_set(&pblk->write_failed, 0);
-	atomic_long_set(&pblk->erase_failed, 0);
-
-	ret = pblk_core_init(pblk);
-	if (ret) {
-		pblk_err(pblk, "could not initialize core\n");
-		goto fail;
-	}
-
-	ret = pblk_lines_init(pblk);
-	if (ret) {
-		pblk_err(pblk, "could not initialize lines\n");
-		goto fail_free_core;
-	}
-
-	ret = pblk_rwb_init(pblk);
-	if (ret) {
-		pblk_err(pblk, "could not initialize write buffer\n");
-		goto fail_free_lines;
-	}
-
-	ret = pblk_l2p_init(pblk, flags & NVM_TARGET_FACTORY);
-	if (ret) {
-		pblk_err(pblk, "could not initialize maps\n");
-		goto fail_free_rwb;
-	}
-
-	ret = pblk_writer_init(pblk);
-	if (ret) {
-		if (ret != -EINTR)
-			pblk_err(pblk, "could not initialize write thread\n");
-		goto fail_free_l2p;
-	}
-
-	ret = pblk_gc_init(pblk);
-	if (ret) {
-		pblk_err(pblk, "could not initialize gc\n");
-		goto fail_stop_writer;
-	}
-
-	/* inherit the size from the underlying device */
-	blk_queue_logical_block_size(tqueue, queue_physical_block_size(bqueue));
-	blk_queue_max_hw_sectors(tqueue, queue_max_hw_sectors(bqueue));
-
-	blk_queue_write_cache(tqueue, true, false);
-
-	tqueue->limits.discard_granularity = geo->clba * geo->csecs;
-	tqueue->limits.discard_alignment = 0;
-	blk_queue_max_discard_sectors(tqueue, UINT_MAX >> 9);
-	blk_queue_flag_set(QUEUE_FLAG_DISCARD, tqueue);
-
-	pblk_info(pblk, "luns:%u, lines:%d, secs:%llu, buf entries:%u\n",
-			geo->all_luns, pblk->l_mg.nr_lines,
-			(unsigned long long)pblk->capacity,
-			pblk->rwb.nr_entries);
-
-	wake_up_process(pblk->writer_ts);
-
-	/* Check if we need to start GC */
-	pblk_gc_should_kick(pblk);
-
-	return pblk;
-
-fail_stop_writer:
-	pblk_writer_stop(pblk);
-fail_free_l2p:
-	pblk_l2p_free(pblk);
-fail_free_rwb:
-	pblk_rwb_free(pblk);
-fail_free_lines:
-	pblk_lines_free(pblk);
-fail_free_core:
-	pblk_core_free(pblk);
-fail:
-	kfree(pblk);
-	return ERR_PTR(ret);
-}
-
-/* physical block device target */
-static struct nvm_tgt_type tt_pblk = {
-	.name		= "pblk",
-	.version	= {1, 0, 0},
-
-	.bops		= &pblk_bops,
-	.capacity	= pblk_capacity,
-
-	.init		= pblk_init,
-	.exit		= pblk_exit,
-
-	.sysfs_init	= pblk_sysfs_init,
-	.sysfs_exit	= pblk_sysfs_exit,
-	.owner		= THIS_MODULE,
-};
-
-static int __init pblk_module_init(void)
-{
-	int ret;
-
-	ret = bioset_init(&pblk_bio_set, BIO_POOL_SIZE, 0, 0);
-	if (ret)
-		return ret;
-	ret = nvm_register_tgt_type(&tt_pblk);
-	if (ret)
-		bioset_exit(&pblk_bio_set);
-	return ret;
-}
-
-static void pblk_module_exit(void)
-{
-	bioset_exit(&pblk_bio_set);
-	nvm_unregister_tgt_type(&tt_pblk);
-}
-
-module_init(pblk_module_init);
-module_exit(pblk_module_exit);
-MODULE_AUTHOR("Javier Gonzalez <javier@cnexlabs.com>");
-MODULE_AUTHOR("Matias Bjorling <matias@cnexlabs.com>");
-MODULE_LICENSE("GPL v2");
-MODULE_DESCRIPTION("Physical Block-Device for Open-Channel SSDs");
diff --git a/drivers/lightnvm/pblk-map.c b/drivers/lightnvm/pblk-map.c
deleted file mode 100644
index 5408e32b2f13..000000000000
--- a/drivers/lightnvm/pblk-map.c
+++ /dev/null
@@ -1,210 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright (C) 2016 CNEX Labs
- * Initial release: Javier Gonzalez <javier@cnexlabs.com>
- *                  Matias Bjorling <matias@cnexlabs.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License version
- * 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * pblk-map.c - pblk's lba-ppa mapping strategy
- *
- */
-
-#include "pblk.h"
-
-static int pblk_map_page_data(struct pblk *pblk, unsigned int sentry,
-			      struct ppa_addr *ppa_list,
-			      unsigned long *lun_bitmap,
-			      void *meta_list,
-			      unsigned int valid_secs)
-{
-	struct pblk_line *line = pblk_line_get_data(pblk);
-	struct pblk_emeta *emeta;
-	struct pblk_w_ctx *w_ctx;
-	__le64 *lba_list;
-	u64 paddr;
-	int nr_secs = pblk->min_write_pgs;
-	int i;
-
-	if (!line)
-		return -ENOSPC;
-
-	if (pblk_line_is_full(line)) {
-		struct pblk_line *prev_line = line;
-
-		/* If we cannot allocate a new line, make sure to store metadata
-		 * on current line and then fail
-		 */
-		line = pblk_line_replace_data(pblk);
-		pblk_line_close_meta(pblk, prev_line);
-
-		if (!line) {
-			pblk_pipeline_stop(pblk);
-			return -ENOSPC;
-		}
-
-	}
-
-	emeta = line->emeta;
-	lba_list = emeta_to_lbas(pblk, emeta->buf);
-
-	paddr = pblk_alloc_page(pblk, line, nr_secs);
-
-	for (i = 0; i < nr_secs; i++, paddr++) {
-		struct pblk_sec_meta *meta = pblk_get_meta(pblk, meta_list, i);
-		__le64 addr_empty = cpu_to_le64(ADDR_EMPTY);
-
-		/* ppa to be sent to the device */
-		ppa_list[i] = addr_to_gen_ppa(pblk, paddr, line->id);
-
-		/* Write context for target bio completion on write buffer. Note
-		 * that the write buffer is protected by the sync backpointer,
-		 * and a single writer thread have access to each specific entry
-		 * at a time. Thus, it is safe to modify the context for the
-		 * entry we are setting up for submission without taking any
-		 * lock or memory barrier.
-		 */
-		if (i < valid_secs) {
-			kref_get(&line->ref);
-			atomic_inc(&line->sec_to_update);
-			w_ctx = pblk_rb_w_ctx(&pblk->rwb, sentry + i);
-			w_ctx->ppa = ppa_list[i];
-			meta->lba = cpu_to_le64(w_ctx->lba);
-			lba_list[paddr] = cpu_to_le64(w_ctx->lba);
-			if (lba_list[paddr] != addr_empty)
-				line->nr_valid_lbas++;
-			else
-				atomic64_inc(&pblk->pad_wa);
-		} else {
-			lba_list[paddr] = addr_empty;
-			meta->lba = addr_empty;
-			__pblk_map_invalidate(pblk, line, paddr);
-		}
-	}
-
-	pblk_down_rq(pblk, ppa_list[0], lun_bitmap);
-	return 0;
-}
-
-int pblk_map_rq(struct pblk *pblk, struct nvm_rq *rqd, unsigned int sentry,
-		 unsigned long *lun_bitmap, unsigned int valid_secs,
-		 unsigned int off)
-{
-	void *meta_list = pblk_get_meta_for_writes(pblk, rqd);
-	void *meta_buffer;
-	struct ppa_addr *ppa_list = nvm_rq_to_ppa_list(rqd);
-	unsigned int map_secs;
-	int min = pblk->min_write_pgs;
-	int i;
-	int ret;
-
-	for (i = off; i < rqd->nr_ppas; i += min) {
-		map_secs = (i + min > valid_secs) ? (valid_secs % min) : min;
-		meta_buffer = pblk_get_meta(pblk, meta_list, i);
-
-		ret = pblk_map_page_data(pblk, sentry + i, &ppa_list[i],
-					lun_bitmap, meta_buffer, map_secs);
-		if (ret)
-			return ret;
-	}
-
-	return 0;
-}
-
-/* only if erase_ppa is set, acquire erase semaphore */
-int pblk_map_erase_rq(struct pblk *pblk, struct nvm_rq *rqd,
-		       unsigned int sentry, unsigned long *lun_bitmap,
-		       unsigned int valid_secs, struct ppa_addr *erase_ppa)
-{
-	struct nvm_tgt_dev *dev = pblk->dev;
-	struct nvm_geo *geo = &dev->geo;
-	struct pblk_line_meta *lm = &pblk->lm;
-	void *meta_list = pblk_get_meta_for_writes(pblk, rqd);
-	void *meta_buffer;
-	struct ppa_addr *ppa_list = nvm_rq_to_ppa_list(rqd);
-	struct pblk_line *e_line, *d_line;
-	unsigned int map_secs;
-	int min = pblk->min_write_pgs;
-	int i, erase_lun;
-	int ret;
-
-
-	for (i = 0; i < rqd->nr_ppas; i += min) {
-		map_secs = (i + min > valid_secs) ? (valid_secs % min) : min;
-		meta_buffer = pblk_get_meta(pblk, meta_list, i);
-
-		ret = pblk_map_page_data(pblk, sentry + i, &ppa_list[i],
-					lun_bitmap, meta_buffer, map_secs);
-		if (ret)
-			return ret;
-
-		erase_lun = pblk_ppa_to_pos(geo, ppa_list[i]);
-
-		/* line can change after page map. We might also be writing the
-		 * last line.
-		 */
-		e_line = pblk_line_get_erase(pblk);
-		if (!e_line)
-			return pblk_map_rq(pblk, rqd, sentry, lun_bitmap,
-							valid_secs, i + min);
-
-		spin_lock(&e_line->lock);
-		if (!test_bit(erase_lun, e_line->erase_bitmap)) {
-			set_bit(erase_lun, e_line->erase_bitmap);
-			atomic_dec(&e_line->left_eblks);
-
-			*erase_ppa = ppa_list[i];
-			erase_ppa->a.blk = e_line->id;
-			erase_ppa->a.reserved = 0;
-
-			spin_unlock(&e_line->lock);
-
-			/* Avoid evaluating e_line->left_eblks */
-			return pblk_map_rq(pblk, rqd, sentry, lun_bitmap,
-							valid_secs, i + min);
-		}
-		spin_unlock(&e_line->lock);
-	}
-
-	d_line = pblk_line_get_data(pblk);
-
-	/* line can change after page map. We might also be writing the
-	 * last line.
-	 */
-	e_line = pblk_line_get_erase(pblk);
-	if (!e_line)
-		return -ENOSPC;
-
-	/* Erase blocks that are bad in this line but might not be in next */
-	if (unlikely(pblk_ppa_empty(*erase_ppa)) &&
-			bitmap_weight(d_line->blk_bitmap, lm->blk_per_line)) {
-		int bit = -1;
-
-retry:
-		bit = find_next_bit(d_line->blk_bitmap,
-						lm->blk_per_line, bit + 1);
-		if (bit >= lm->blk_per_line)
-			return 0;
-
-		spin_lock(&e_line->lock);
-		if (test_bit(bit, e_line->erase_bitmap)) {
-			spin_unlock(&e_line->lock);
-			goto retry;
-		}
-		spin_unlock(&e_line->lock);
-
-		set_bit(bit, e_line->erase_bitmap);
-		atomic_dec(&e_line->left_eblks);
-		*erase_ppa = pblk->luns[bit].bppa; /* set ch and lun */
-		erase_ppa->a.blk = e_line->id;
-	}
-
-	return 0;
-}
diff --git a/drivers/lightnvm/pblk-rb.c b/drivers/lightnvm/pblk-rb.c
deleted file mode 100644
index 5abb1705b039..000000000000
--- a/drivers/lightnvm/pblk-rb.c
+++ /dev/null
@@ -1,858 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright (C) 2016 CNEX Labs
- * Initial release: Javier Gonzalez <javier@cnexlabs.com>
- *
- * Based upon the circular ringbuffer.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License version
- * 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * pblk-rb.c - pblk's write buffer
- */
-
-#include <linux/circ_buf.h>
-
-#include "pblk.h"
-
-static DECLARE_RWSEM(pblk_rb_lock);
-
-static void pblk_rb_data_free(struct pblk_rb *rb)
-{
-	struct pblk_rb_pages *p, *t;
-
-	down_write(&pblk_rb_lock);
-	list_for_each_entry_safe(p, t, &rb->pages, list) {
-		free_pages((unsigned long)page_address(p->pages), p->order);
-		list_del(&p->list);
-		kfree(p);
-	}
-	up_write(&pblk_rb_lock);
-}
-
-void pblk_rb_free(struct pblk_rb *rb)
-{
-	pblk_rb_data_free(rb);
-	vfree(rb->entries);
-}
-
-/*
- * pblk_rb_calculate_size -- calculate the size of the write buffer
- */
-static unsigned int pblk_rb_calculate_size(unsigned int nr_entries,
-					   unsigned int threshold)
-{
-	unsigned int thr_sz = 1 << (get_count_order(threshold + NVM_MAX_VLBA));
-	unsigned int max_sz = max(thr_sz, nr_entries);
-	unsigned int max_io;
-
-	/* Alloc a write buffer that can (i) fit at least two split bios
-	 * (considering max I/O size NVM_MAX_VLBA, and (ii) guarantee that the
-	 * threshold will be respected
-	 */
-	max_io = (1 << max((int)(get_count_order(max_sz)),
-				(int)(get_count_order(NVM_MAX_VLBA << 1))));
-	if ((threshold + NVM_MAX_VLBA) >= max_io)
-		max_io <<= 1;
-
-	return max_io;
-}
-
-/*
- * Initialize ring buffer. The data and metadata buffers must be previously
- * allocated and their size must be a power of two
- * (Documentation/core-api/circular-buffers.rst)
- */
-int pblk_rb_init(struct pblk_rb *rb, unsigned int size, unsigned int threshold,
-		 unsigned int seg_size)
-{
-	struct pblk *pblk = container_of(rb, struct pblk, rwb);
-	struct pblk_rb_entry *entries;
-	unsigned int init_entry = 0;
-	unsigned int max_order = MAX_ORDER - 1;
-	unsigned int power_size, power_seg_sz;
-	unsigned int alloc_order, order, iter;
-	unsigned int nr_entries;
-
-	nr_entries = pblk_rb_calculate_size(size, threshold);
-	entries = vzalloc(array_size(nr_entries, sizeof(struct pblk_rb_entry)));
-	if (!entries)
-		return -ENOMEM;
-
-	power_size = get_count_order(nr_entries);
-	power_seg_sz = get_count_order(seg_size);
-
-	down_write(&pblk_rb_lock);
-	rb->entries = entries;
-	rb->seg_size = (1 << power_seg_sz);
-	rb->nr_entries = (1 << power_size);
-	rb->mem = rb->subm = rb->sync = rb->l2p_update = 0;
-	rb->back_thres = threshold;
-	rb->flush_point = EMPTY_ENTRY;
-
-	spin_lock_init(&rb->w_lock);
-	spin_lock_init(&rb->s_lock);
-
-	INIT_LIST_HEAD(&rb->pages);
-
-	alloc_order = power_size;
-	if (alloc_order >= max_order) {
-		order = max_order;
-		iter = (1 << (alloc_order - max_order));
-	} else {
-		order = alloc_order;
-		iter = 1;
-	}
-
-	do {
-		struct pblk_rb_entry *entry;
-		struct pblk_rb_pages *page_set;
-		void *kaddr;
-		unsigned long set_size;
-		int i;
-
-		page_set = kmalloc(sizeof(struct pblk_rb_pages), GFP_KERNEL);
-		if (!page_set) {
-			up_write(&pblk_rb_lock);
-			vfree(entries);
-			return -ENOMEM;
-		}
-
-		page_set->order = order;
-		page_set->pages = alloc_pages(GFP_KERNEL, order);
-		if (!page_set->pages) {
-			kfree(page_set);
-			pblk_rb_data_free(rb);
-			up_write(&pblk_rb_lock);
-			vfree(entries);
-			return -ENOMEM;
-		}
-		kaddr = page_address(page_set->pages);
-
-		entry = &rb->entries[init_entry];
-		entry->data = kaddr;
-		entry->cacheline = pblk_cacheline_to_addr(init_entry++);
-		entry->w_ctx.flags = PBLK_WRITABLE_ENTRY;
-
-		set_size = (1 << order);
-		for (i = 1; i < set_size; i++) {
-			entry = &rb->entries[init_entry];
-			entry->cacheline = pblk_cacheline_to_addr(init_entry++);
-			entry->data = kaddr + (i * rb->seg_size);
-			entry->w_ctx.flags = PBLK_WRITABLE_ENTRY;
-			bio_list_init(&entry->w_ctx.bios);
-		}
-
-		list_add_tail(&page_set->list, &rb->pages);
-		iter--;
-	} while (iter > 0);
-	up_write(&pblk_rb_lock);
-
-#ifdef CONFIG_NVM_PBLK_DEBUG
-	atomic_set(&rb->inflight_flush_point, 0);
-#endif
-
-	/*
-	 * Initialize rate-limiter, which controls access to the write buffer
-	 * by user and GC I/O
-	 */
-	pblk_rl_init(&pblk->rl, rb->nr_entries, threshold);
-
-	return 0;
-}
-
-static void clean_wctx(struct pblk_w_ctx *w_ctx)
-{
-	int flags;
-
-	flags = READ_ONCE(w_ctx->flags);
-	WARN_ONCE(!(flags & PBLK_SUBMITTED_ENTRY),
-			"pblk: overwriting unsubmitted data\n");
-
-	/* Release flags on context. Protect from writes and reads */
-	smp_store_release(&w_ctx->flags, PBLK_WRITABLE_ENTRY);
-	pblk_ppa_set_empty(&w_ctx->ppa);
-	w_ctx->lba = ADDR_EMPTY;
-}
-
-#define pblk_rb_ring_count(head, tail, size) CIRC_CNT(head, tail, size)
-#define pblk_rb_ring_space(rb, head, tail, size) \
-					(CIRC_SPACE(head, tail, size))
-
-/*
- * Buffer space is calculated with respect to the back pointer signaling
- * synchronized entries to the media.
- */
-static unsigned int pblk_rb_space(struct pblk_rb *rb)
-{
-	unsigned int mem = READ_ONCE(rb->mem);
-	unsigned int sync = READ_ONCE(rb->sync);
-
-	return pblk_rb_ring_space(rb, mem, sync, rb->nr_entries);
-}
-
-unsigned int pblk_rb_ptr_wrap(struct pblk_rb *rb, unsigned int p,
-			      unsigned int nr_entries)
-{
-	return (p + nr_entries) & (rb->nr_entries - 1);
-}
-
-/*
- * Buffer count is calculated with respect to the submission entry signaling the
- * entries that are available to send to the media
- */
-unsigned int pblk_rb_read_count(struct pblk_rb *rb)
-{
-	unsigned int mem = READ_ONCE(rb->mem);
-	unsigned int subm = READ_ONCE(rb->subm);
-
-	return pblk_rb_ring_count(mem, subm, rb->nr_entries);
-}
-
-unsigned int pblk_rb_sync_count(struct pblk_rb *rb)
-{
-	unsigned int mem = READ_ONCE(rb->mem);
-	unsigned int sync = READ_ONCE(rb->sync);
-
-	return pblk_rb_ring_count(mem, sync, rb->nr_entries);
-}
-
-unsigned int pblk_rb_read_commit(struct pblk_rb *rb, unsigned int nr_entries)
-{
-	unsigned int subm;
-
-	subm = READ_ONCE(rb->subm);
-	/* Commit read means updating submission pointer */
-	smp_store_release(&rb->subm, pblk_rb_ptr_wrap(rb, subm, nr_entries));
-
-	return subm;
-}
-
-static int __pblk_rb_update_l2p(struct pblk_rb *rb, unsigned int to_update)
-{
-	struct pblk *pblk = container_of(rb, struct pblk, rwb);
-	struct pblk_line *line;
-	struct pblk_rb_entry *entry;
-	struct pblk_w_ctx *w_ctx;
-	unsigned int user_io = 0, gc_io = 0;
-	unsigned int i;
-	int flags;
-
-	for (i = 0; i < to_update; i++) {
-		entry = &rb->entries[rb->l2p_update];
-		w_ctx = &entry->w_ctx;
-
-		flags = READ_ONCE(entry->w_ctx.flags);
-		if (flags & PBLK_IOTYPE_USER)
-			user_io++;
-		else if (flags & PBLK_IOTYPE_GC)
-			gc_io++;
-		else
-			WARN(1, "pblk: unknown IO type\n");
-
-		pblk_update_map_dev(pblk, w_ctx->lba, w_ctx->ppa,
-							entry->cacheline);
-
-		line = pblk_ppa_to_line(pblk, w_ctx->ppa);
-		atomic_dec(&line->sec_to_update);
-		kref_put(&line->ref, pblk_line_put);
-		clean_wctx(w_ctx);
-		rb->l2p_update = pblk_rb_ptr_wrap(rb, rb->l2p_update, 1);
-	}
-
-	pblk_rl_out(&pblk->rl, user_io, gc_io);
-
-	return 0;
-}
-
-/*
- * When we move the l2p_update pointer, we update the l2p table - lookups will
- * point to the physical address instead of to the cacheline in the write buffer
- * from this moment on.
- */
-static int pblk_rb_update_l2p(struct pblk_rb *rb, unsigned int nr_entries,
-			      unsigned int mem, unsigned int sync)
-{
-	unsigned int space, count;
-	int ret = 0;
-
-	lockdep_assert_held(&rb->w_lock);
-
-	/* Update l2p only as buffer entries are being overwritten */
-	space = pblk_rb_ring_space(rb, mem, rb->l2p_update, rb->nr_entries);
-	if (space > nr_entries)
-		goto out;
-
-	count = nr_entries - space;
-	/* l2p_update used exclusively under rb->w_lock */
-	ret = __pblk_rb_update_l2p(rb, count);
-
-out:
-	return ret;
-}
-
-/*
- * Update the l2p entry for all sectors stored on the write buffer. This means
- * that all future lookups to the l2p table will point to a device address, not
- * to the cacheline in the write buffer.
- */
-void pblk_rb_sync_l2p(struct pblk_rb *rb)
-{
-	unsigned int sync;
-	unsigned int to_update;
-
-	spin_lock(&rb->w_lock);
-
-	/* Protect from reads and writes */
-	sync = smp_load_acquire(&rb->sync);
-
-	to_update = pblk_rb_ring_count(sync, rb->l2p_update, rb->nr_entries);
-	__pblk_rb_update_l2p(rb, to_update);
-
-	spin_unlock(&rb->w_lock);
-}
-
-/*
- * Write @nr_entries to ring buffer from @data buffer if there is enough space.
- * Typically, 4KB data chunks coming from a bio will be copied to the ring
- * buffer, thus the write will fail if not all incoming data can be copied.
- *
- */
-static void __pblk_rb_write_entry(struct pblk_rb *rb, void *data,
-				  struct pblk_w_ctx w_ctx,
-				  struct pblk_rb_entry *entry)
-{
-	memcpy(entry->data, data, rb->seg_size);
-
-	entry->w_ctx.lba = w_ctx.lba;
-	entry->w_ctx.ppa = w_ctx.ppa;
-}
-
-void pblk_rb_write_entry_user(struct pblk_rb *rb, void *data,
-			      struct pblk_w_ctx w_ctx, unsigned int ring_pos)
-{
-	struct pblk *pblk = container_of(rb, struct pblk, rwb);
-	struct pblk_rb_entry *entry;
-	int flags;
-
-	entry = &rb->entries[ring_pos];
-	flags = READ_ONCE(entry->w_ctx.flags);
-#ifdef CONFIG_NVM_PBLK_DEBUG
-	/* Caller must guarantee that the entry is free */
-	BUG_ON(!(flags & PBLK_WRITABLE_ENTRY));
-#endif
-
-	__pblk_rb_write_entry(rb, data, w_ctx, entry);
-
-	pblk_update_map_cache(pblk, w_ctx.lba, entry->cacheline);
-	flags = w_ctx.flags | PBLK_WRITTEN_DATA;
-
-	/* Release flags on write context. Protect from writes */
-	smp_store_release(&entry->w_ctx.flags, flags);
-}
-
-void pblk_rb_write_entry_gc(struct pblk_rb *rb, void *data,
-			    struct pblk_w_ctx w_ctx, struct pblk_line *line,
-			    u64 paddr, unsigned int ring_pos)
-{
-	struct pblk *pblk = container_of(rb, struct pblk, rwb);
-	struct pblk_rb_entry *entry;
-	int flags;
-
-	entry = &rb->entries[ring_pos];
-	flags = READ_ONCE(entry->w_ctx.flags);
-#ifdef CONFIG_NVM_PBLK_DEBUG
-	/* Caller must guarantee that the entry is free */
-	BUG_ON(!(flags & PBLK_WRITABLE_ENTRY));
-#endif
-
-	__pblk_rb_write_entry(rb, data, w_ctx, entry);
-
-	if (!pblk_update_map_gc(pblk, w_ctx.lba, entry->cacheline, line, paddr))
-		entry->w_ctx.lba = ADDR_EMPTY;
-
-	flags = w_ctx.flags | PBLK_WRITTEN_DATA;
-
-	/* Release flags on write context. Protect from writes */
-	smp_store_release(&entry->w_ctx.flags, flags);
-}
-
-static int pblk_rb_flush_point_set(struct pblk_rb *rb, struct bio *bio,
-				   unsigned int pos)
-{
-	struct pblk_rb_entry *entry;
-	unsigned int sync, flush_point;
-
-	pblk_rb_sync_init(rb, NULL);
-	sync = READ_ONCE(rb->sync);
-
-	if (pos == sync) {
-		pblk_rb_sync_end(rb, NULL);
-		return 0;
-	}
-
-#ifdef CONFIG_NVM_PBLK_DEBUG
-	atomic_inc(&rb->inflight_flush_point);
-#endif
-
-	flush_point = (pos == 0) ? (rb->nr_entries - 1) : (pos - 1);
-	entry = &rb->entries[flush_point];
-
-	/* Protect flush points */
-	smp_store_release(&rb->flush_point, flush_point);
-
-	if (bio)
-		bio_list_add(&entry->w_ctx.bios, bio);
-
-	pblk_rb_sync_end(rb, NULL);
-
-	return bio ? 1 : 0;
-}
-
-static int __pblk_rb_may_write(struct pblk_rb *rb, unsigned int nr_entries,
-			       unsigned int *pos)
-{
-	unsigned int mem;
-	unsigned int sync;
-	unsigned int threshold;
-
-	sync = READ_ONCE(rb->sync);
-	mem = READ_ONCE(rb->mem);
-
-	threshold = nr_entries + rb->back_thres;
-
-	if (pblk_rb_ring_space(rb, mem, sync, rb->nr_entries) < threshold)
-		return 0;
-
-	if (pblk_rb_update_l2p(rb, nr_entries, mem, sync))
-		return 0;
-
-	*pos = mem;
-
-	return 1;
-}
-
-static int pblk_rb_may_write(struct pblk_rb *rb, unsigned int nr_entries,
-			     unsigned int *pos)
-{
-	if (!__pblk_rb_may_write(rb, nr_entries, pos))
-		return 0;
-
-	/* Protect from read count */
-	smp_store_release(&rb->mem, pblk_rb_ptr_wrap(rb, *pos, nr_entries));
-	return 1;
-}
-
-void pblk_rb_flush(struct pblk_rb *rb)
-{
-	struct pblk *pblk = container_of(rb, struct pblk, rwb);
-	unsigned int mem = READ_ONCE(rb->mem);
-
-	if (pblk_rb_flush_point_set(rb, NULL, mem))
-		return;
-
-	pblk_write_kick(pblk);
-}
-
-static int pblk_rb_may_write_flush(struct pblk_rb *rb, unsigned int nr_entries,
-				   unsigned int *pos, struct bio *bio,
-				   int *io_ret)
-{
-	unsigned int mem;
-
-	if (!__pblk_rb_may_write(rb, nr_entries, pos))
-		return 0;
-
-	mem = pblk_rb_ptr_wrap(rb, *pos, nr_entries);
-	*io_ret = NVM_IO_DONE;
-
-	if (bio->bi_opf & REQ_PREFLUSH) {
-		struct pblk *pblk = container_of(rb, struct pblk, rwb);
-
-		atomic64_inc(&pblk->nr_flush);
-		if (pblk_rb_flush_point_set(&pblk->rwb, bio, mem))
-			*io_ret = NVM_IO_OK;
-	}
-
-	/* Protect from read count */
-	smp_store_release(&rb->mem, mem);
-
-	return 1;
-}
-
-/*
- * Atomically check that (i) there is space on the write buffer for the
- * incoming I/O, and (ii) the current I/O type has enough budget in the write
- * buffer (rate-limiter).
- */
-int pblk_rb_may_write_user(struct pblk_rb *rb, struct bio *bio,
-			   unsigned int nr_entries, unsigned int *pos)
-{
-	struct pblk *pblk = container_of(rb, struct pblk, rwb);
-	int io_ret;
-
-	spin_lock(&rb->w_lock);
-	io_ret = pblk_rl_user_may_insert(&pblk->rl, nr_entries);
-	if (io_ret) {
-		spin_unlock(&rb->w_lock);
-		return io_ret;
-	}
-
-	if (!pblk_rb_may_write_flush(rb, nr_entries, pos, bio, &io_ret)) {
-		spin_unlock(&rb->w_lock);
-		return NVM_IO_REQUEUE;
-	}
-
-	pblk_rl_user_in(&pblk->rl, nr_entries);
-	spin_unlock(&rb->w_lock);
-
-	return io_ret;
-}
-
-/*
- * Look at pblk_rb_may_write_user comment
- */
-int pblk_rb_may_write_gc(struct pblk_rb *rb, unsigned int nr_entries,
-			 unsigned int *pos)
-{
-	struct pblk *pblk = container_of(rb, struct pblk, rwb);
-
-	spin_lock(&rb->w_lock);
-	if (!pblk_rl_gc_may_insert(&pblk->rl, nr_entries)) {
-		spin_unlock(&rb->w_lock);
-		return 0;
-	}
-
-	if (!pblk_rb_may_write(rb, nr_entries, pos)) {
-		spin_unlock(&rb->w_lock);
-		return 0;
-	}
-
-	pblk_rl_gc_in(&pblk->rl, nr_entries);
-	spin_unlock(&rb->w_lock);
-
-	return 1;
-}
-
-/*
- * Read available entries on rb and add them to the given bio. To avoid a memory
- * copy, a page reference to the write buffer is used to be added to the bio.
- *
- * This function is used by the write thread to form the write bio that will
- * persist data on the write buffer to the media.
- */
-unsigned int pblk_rb_read_to_bio(struct pblk_rb *rb, struct nvm_rq *rqd,
-				 unsigned int pos, unsigned int nr_entries,
-				 unsigned int count)
-{
-	struct pblk *pblk = container_of(rb, struct pblk, rwb);
-	struct request_queue *q = pblk->dev->q;
-	struct pblk_c_ctx *c_ctx = nvm_rq_to_pdu(rqd);
-	struct bio *bio = rqd->bio;
-	struct pblk_rb_entry *entry;
-	struct page *page;
-	unsigned int pad = 0, to_read = nr_entries;
-	unsigned int i;
-	int flags;
-
-	if (count < nr_entries) {
-		pad = nr_entries - count;
-		to_read = count;
-	}
-
-	/* Add space for packed metadata if in use*/
-	pad += (pblk->min_write_pgs - pblk->min_write_pgs_data);
-
-	c_ctx->sentry = pos;
-	c_ctx->nr_valid = to_read;
-	c_ctx->nr_padded = pad;
-
-	for (i = 0; i < to_read; i++) {
-		entry = &rb->entries[pos];
-
-		/* A write has been allowed into the buffer, but data is still
-		 * being copied to it. It is ok to busy wait.
-		 */
-try:
-		flags = READ_ONCE(entry->w_ctx.flags);
-		if (!(flags & PBLK_WRITTEN_DATA)) {
-			io_schedule();
-			goto try;
-		}
-
-		page = virt_to_page(entry->data);
-		if (!page) {
-			pblk_err(pblk, "could not allocate write bio page\n");
-			flags &= ~PBLK_WRITTEN_DATA;
-			flags |= PBLK_SUBMITTED_ENTRY;
-			/* Release flags on context. Protect from writes */
-			smp_store_release(&entry->w_ctx.flags, flags);
-			return NVM_IO_ERR;
-		}
-
-		if (bio_add_pc_page(q, bio, page, rb->seg_size, 0) !=
-								rb->seg_size) {
-			pblk_err(pblk, "could not add page to write bio\n");
-			flags &= ~PBLK_WRITTEN_DATA;
-			flags |= PBLK_SUBMITTED_ENTRY;
-			/* Release flags on context. Protect from writes */
-			smp_store_release(&entry->w_ctx.flags, flags);
-			return NVM_IO_ERR;
-		}
-
-		flags &= ~PBLK_WRITTEN_DATA;
-		flags |= PBLK_SUBMITTED_ENTRY;
-
-		/* Release flags on context. Protect from writes */
-		smp_store_release(&entry->w_ctx.flags, flags);
-
-		pos = pblk_rb_ptr_wrap(rb, pos, 1);
-	}
-
-	if (pad) {
-		if (pblk_bio_add_pages(pblk, bio, GFP_KERNEL, pad)) {
-			pblk_err(pblk, "could not pad page in write bio\n");
-			return NVM_IO_ERR;
-		}
-
-		if (pad < pblk->min_write_pgs)
-			atomic64_inc(&pblk->pad_dist[pad - 1]);
-		else
-			pblk_warn(pblk, "padding more than min. sectors\n");
-
-		atomic64_add(pad, &pblk->pad_wa);
-	}
-
-#ifdef CONFIG_NVM_PBLK_DEBUG
-	atomic_long_add(pad, &pblk->padded_writes);
-#endif
-
-	return NVM_IO_OK;
-}
-
-/*
- * Copy to bio only if the lba matches the one on the given cache entry.
- * Otherwise, it means that the entry has been overwritten, and the bio should
- * be directed to disk.
- */
-int pblk_rb_copy_to_bio(struct pblk_rb *rb, struct bio *bio, sector_t lba,
-			struct ppa_addr ppa)
-{
-	struct pblk *pblk = container_of(rb, struct pblk, rwb);
-	struct pblk_rb_entry *entry;
-	struct pblk_w_ctx *w_ctx;
-	struct ppa_addr l2p_ppa;
-	u64 pos = pblk_addr_to_cacheline(ppa);
-	void *data;
-	int flags;
-	int ret = 1;
-
-
-#ifdef CONFIG_NVM_PBLK_DEBUG
-	/* Caller must ensure that the access will not cause an overflow */
-	BUG_ON(pos >= rb->nr_entries);
-#endif
-	entry = &rb->entries[pos];
-	w_ctx = &entry->w_ctx;
-	flags = READ_ONCE(w_ctx->flags);
-
-	spin_lock(&rb->w_lock);
-	spin_lock(&pblk->trans_lock);
-	l2p_ppa = pblk_trans_map_get(pblk, lba);
-	spin_unlock(&pblk->trans_lock);
-
-	/* Check if the entry has been overwritten or is scheduled to be */
-	if (!pblk_ppa_comp(l2p_ppa, ppa) || w_ctx->lba != lba ||
-						flags & PBLK_WRITABLE_ENTRY) {
-		ret = 0;
-		goto out;
-	}
-	data = bio_data(bio);
-	memcpy(data, entry->data, rb->seg_size);
-
-out:
-	spin_unlock(&rb->w_lock);
-	return ret;
-}
-
-struct pblk_w_ctx *pblk_rb_w_ctx(struct pblk_rb *rb, unsigned int pos)
-{
-	unsigned int entry = pblk_rb_ptr_wrap(rb, pos, 0);
-
-	return &rb->entries[entry].w_ctx;
-}
-
-unsigned int pblk_rb_sync_init(struct pblk_rb *rb, unsigned long *flags)
-	__acquires(&rb->s_lock)
-{
-	if (flags)
-		spin_lock_irqsave(&rb->s_lock, *flags);
-	else
-		spin_lock_irq(&rb->s_lock);
-
-	return rb->sync;
-}
-
-void pblk_rb_sync_end(struct pblk_rb *rb, unsigned long *flags)
-	__releases(&rb->s_lock)
-{
-	lockdep_assert_held(&rb->s_lock);
-
-	if (flags)
-		spin_unlock_irqrestore(&rb->s_lock, *flags);
-	else
-		spin_unlock_irq(&rb->s_lock);
-}
-
-unsigned int pblk_rb_sync_advance(struct pblk_rb *rb, unsigned int nr_entries)
-{
-	unsigned int sync, flush_point;
-	lockdep_assert_held(&rb->s_lock);
-
-	sync = READ_ONCE(rb->sync);
-	flush_point = READ_ONCE(rb->flush_point);
-
-	if (flush_point != EMPTY_ENTRY) {
-		unsigned int secs_to_flush;
-
-		secs_to_flush = pblk_rb_ring_count(flush_point, sync,
-					rb->nr_entries);
-		if (secs_to_flush < nr_entries) {
-			/* Protect flush points */
-			smp_store_release(&rb->flush_point, EMPTY_ENTRY);
-		}
-	}
-
-	sync = pblk_rb_ptr_wrap(rb, sync, nr_entries);
-
-	/* Protect from counts */
-	smp_store_release(&rb->sync, sync);
-
-	return sync;
-}
-
-/* Calculate how many sectors to submit up to the current flush point. */
-unsigned int pblk_rb_flush_point_count(struct pblk_rb *rb)
-{
-	unsigned int subm, sync, flush_point;
-	unsigned int submitted, to_flush;
-
-	/* Protect flush points */
-	flush_point = smp_load_acquire(&rb->flush_point);
-	if (flush_point == EMPTY_ENTRY)
-		return 0;
-
-	/* Protect syncs */
-	sync = smp_load_acquire(&rb->sync);
-
-	subm = READ_ONCE(rb->subm);
-	submitted = pblk_rb_ring_count(subm, sync, rb->nr_entries);
-
-	/* The sync point itself counts as a sector to sync */
-	to_flush = pblk_rb_ring_count(flush_point, sync, rb->nr_entries) + 1;
-
-	return (submitted < to_flush) ? (to_flush - submitted) : 0;
-}
-
-int pblk_rb_tear_down_check(struct pblk_rb *rb)
-{
-	struct pblk_rb_entry *entry;
-	int i;
-	int ret = 0;
-
-	spin_lock(&rb->w_lock);
-	spin_lock_irq(&rb->s_lock);
-
-	if ((rb->mem == rb->subm) && (rb->subm == rb->sync) &&
-				(rb->sync == rb->l2p_update) &&
-				(rb->flush_point == EMPTY_ENTRY)) {
-		goto out;
-	}
-
-	if (!rb->entries) {
-		ret = 1;
-		goto out;
-	}
-
-	for (i = 0; i < rb->nr_entries; i++) {
-		entry = &rb->entries[i];
-
-		if (!entry->data) {
-			ret = 1;
-			goto out;
-		}
-	}
-
-out:
-	spin_unlock_irq(&rb->s_lock);
-	spin_unlock(&rb->w_lock);
-
-	return ret;
-}
-
-unsigned int pblk_rb_wrap_pos(struct pblk_rb *rb, unsigned int pos)
-{
-	return (pos & (rb->nr_entries - 1));
-}
-
-int pblk_rb_pos_oob(struct pblk_rb *rb, u64 pos)
-{
-	return (pos >= rb->nr_entries);
-}
-
-ssize_t pblk_rb_sysfs(struct pblk_rb *rb, char *buf)
-{
-	struct pblk *pblk = container_of(rb, struct pblk, rwb);
-	struct pblk_c_ctx *c;
-	ssize_t offset;
-	int queued_entries = 0;
-
-	spin_lock_irq(&rb->s_lock);
-	list_for_each_entry(c, &pblk->compl_list, list)
-		queued_entries++;
-	spin_unlock_irq(&rb->s_lock);
-
-	if (rb->flush_point != EMPTY_ENTRY)
-		offset = scnprintf(buf, PAGE_SIZE,
-			"%u\t%u\t%u\t%u\t%u\t%u\t%u - %u/%u/%u - %d\n",
-			rb->nr_entries,
-			rb->mem,
-			rb->subm,
-			rb->sync,
-			rb->l2p_update,
-#ifdef CONFIG_NVM_PBLK_DEBUG
-			atomic_read(&rb->inflight_flush_point),
-#else
-			0,
-#endif
-			rb->flush_point,
-			pblk_rb_read_count(rb),
-			pblk_rb_space(rb),
-			pblk_rb_flush_point_count(rb),
-			queued_entries);
-	else
-		offset = scnprintf(buf, PAGE_SIZE,
-			"%u\t%u\t%u\t%u\t%u\t%u\tNULL - %u/%u/%u - %d\n",
-			rb->nr_entries,
-			rb->mem,
-			rb->subm,
-			rb->sync,
-			rb->l2p_update,
-#ifdef CONFIG_NVM_PBLK_DEBUG
-			atomic_read(&rb->inflight_flush_point),
-#else
-			0,
-#endif
-			pblk_rb_read_count(rb),
-			pblk_rb_space(rb),
-			pblk_rb_flush_point_count(rb),
-			queued_entries);
-
-	return offset;
-}
diff --git a/drivers/lightnvm/pblk-read.c b/drivers/lightnvm/pblk-read.c
deleted file mode 100644
index c28537a489bc..000000000000
--- a/drivers/lightnvm/pblk-read.c
+++ /dev/null
@@ -1,474 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright (C) 2016 CNEX Labs
- * Initial release: Javier Gonzalez <javier@cnexlabs.com>
- *                  Matias Bjorling <matias@cnexlabs.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License version
- * 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * pblk-read.c - pblk's read path
- */
-
-#include "pblk.h"
-
-/*
- * There is no guarantee that the value read from cache has not been updated and
- * resides at another location in the cache. We guarantee though that if the
- * value is read from the cache, it belongs to the mapped lba. In order to
- * guarantee and order between writes and reads are ordered, a flush must be
- * issued.
- */
-static int pblk_read_from_cache(struct pblk *pblk, struct bio *bio,
-				sector_t lba, struct ppa_addr ppa)
-{
-#ifdef CONFIG_NVM_PBLK_DEBUG
-	/* Callers must ensure that the ppa points to a cache address */
-	BUG_ON(pblk_ppa_empty(ppa));
-	BUG_ON(!pblk_addr_in_cache(ppa));
-#endif
-
-	return pblk_rb_copy_to_bio(&pblk->rwb, bio, lba, ppa);
-}
-
-static int pblk_read_ppalist_rq(struct pblk *pblk, struct nvm_rq *rqd,
-				 struct bio *bio, sector_t blba,
-				 bool *from_cache)
-{
-	void *meta_list = rqd->meta_list;
-	int nr_secs, i;
-
-retry:
-	nr_secs = pblk_lookup_l2p_seq(pblk, rqd->ppa_list, blba, rqd->nr_ppas,
-					from_cache);
-
-	if (!*from_cache)
-		goto end;
-
-	for (i = 0; i < nr_secs; i++) {
-		struct pblk_sec_meta *meta = pblk_get_meta(pblk, meta_list, i);
-		sector_t lba = blba + i;
-
-		if (pblk_ppa_empty(rqd->ppa_list[i])) {
-			__le64 addr_empty = cpu_to_le64(ADDR_EMPTY);
-
-			meta->lba = addr_empty;
-		} else if (pblk_addr_in_cache(rqd->ppa_list[i])) {
-			/*
-			 * Try to read from write buffer. The address is later
-			 * checked on the write buffer to prevent retrieving
-			 * overwritten data.
-			 */
-			if (!pblk_read_from_cache(pblk, bio, lba,
-							rqd->ppa_list[i])) {
-				if (i == 0) {
-					/*
-					 * We didn't call with bio_advance()
-					 * yet, so we can just retry.
-					 */
-					goto retry;
-				} else {
-					/*
-					 * We already call bio_advance()
-					 * so we cannot retry and we need
-					 * to quit that function in order
-					 * to allow caller to handle the bio
-					 * splitting in the current sector
-					 * position.
-					 */
-					nr_secs = i;
-					goto end;
-				}
-			}
-			meta->lba = cpu_to_le64(lba);
-#ifdef CONFIG_NVM_PBLK_DEBUG
-			atomic_long_inc(&pblk->cache_reads);
-#endif
-		}
-		bio_advance(bio, PBLK_EXPOSED_PAGE_SIZE);
-	}
-
-end:
-	if (pblk_io_aligned(pblk, nr_secs))
-		rqd->is_seq = 1;
-
-#ifdef CONFIG_NVM_PBLK_DEBUG
-	atomic_long_add(nr_secs, &pblk->inflight_reads);
-#endif
-
-	return nr_secs;
-}
-
-
-static void pblk_read_check_seq(struct pblk *pblk, struct nvm_rq *rqd,
-				sector_t blba)
-{
-	void *meta_list = rqd->meta_list;
-	int nr_lbas = rqd->nr_ppas;
-	int i;
-
-	if (!pblk_is_oob_meta_supported(pblk))
-		return;
-
-	for (i = 0; i < nr_lbas; i++) {
-		struct pblk_sec_meta *meta = pblk_get_meta(pblk, meta_list, i);
-		u64 lba = le64_to_cpu(meta->lba);
-
-		if (lba == ADDR_EMPTY)
-			continue;
-
-		if (lba != blba + i) {
-#ifdef CONFIG_NVM_PBLK_DEBUG
-			struct ppa_addr *ppa_list = nvm_rq_to_ppa_list(rqd);
-
-			print_ppa(pblk, &ppa_list[i], "seq", i);
-#endif
-			pblk_err(pblk, "corrupted read LBA (%llu/%llu)\n",
-							lba, (u64)blba + i);
-			WARN_ON(1);
-		}
-	}
-}
-
-/*
- * There can be holes in the lba list.
- */
-static void pblk_read_check_rand(struct pblk *pblk, struct nvm_rq *rqd,
-				 u64 *lba_list, int nr_lbas)
-{
-	void *meta_lba_list = rqd->meta_list;
-	int i, j;
-
-	if (!pblk_is_oob_meta_supported(pblk))
-		return;
-
-	for (i = 0, j = 0; i < nr_lbas; i++) {
-		struct pblk_sec_meta *meta = pblk_get_meta(pblk,
-							   meta_lba_list, j);
-		u64 lba = lba_list[i];
-		u64 meta_lba;
-
-		if (lba == ADDR_EMPTY)
-			continue;
-
-		meta_lba = le64_to_cpu(meta->lba);
-
-		if (lba != meta_lba) {
-#ifdef CONFIG_NVM_PBLK_DEBUG
-			struct ppa_addr *ppa_list = nvm_rq_to_ppa_list(rqd);
-
-			print_ppa(pblk, &ppa_list[j], "rnd", j);
-#endif
-			pblk_err(pblk, "corrupted read LBA (%llu/%llu)\n",
-							meta_lba, lba);
-			WARN_ON(1);
-		}
-
-		j++;
-	}
-
-	WARN_ONCE(j != rqd->nr_ppas, "pblk: corrupted random request\n");
-}
-
-static void pblk_end_user_read(struct bio *bio, int error)
-{
-	if (error && error != NVM_RSP_WARN_HIGHECC)
-		bio_io_error(bio);
-	else
-		bio_endio(bio);
-}
-
-static void __pblk_end_io_read(struct pblk *pblk, struct nvm_rq *rqd,
-			       bool put_line)
-{
-	struct pblk_g_ctx *r_ctx = nvm_rq_to_pdu(rqd);
-	struct bio *int_bio = rqd->bio;
-	unsigned long start_time = r_ctx->start_time;
-
-	bio_end_io_acct(int_bio, start_time);
-
-	if (rqd->error)
-		pblk_log_read_err(pblk, rqd);
-
-	pblk_read_check_seq(pblk, rqd, r_ctx->lba);
-	bio_put(int_bio);
-
-	if (put_line)
-		pblk_rq_to_line_put(pblk, rqd);
-
-#ifdef CONFIG_NVM_PBLK_DEBUG
-	atomic_long_add(rqd->nr_ppas, &pblk->sync_reads);
-	atomic_long_sub(rqd->nr_ppas, &pblk->inflight_reads);
-#endif
-
-	pblk_free_rqd(pblk, rqd, PBLK_READ);
-	atomic_dec(&pblk->inflight_io);
-}
-
-static void pblk_end_io_read(struct nvm_rq *rqd)
-{
-	struct pblk *pblk = rqd->private;
-	struct pblk_g_ctx *r_ctx = nvm_rq_to_pdu(rqd);
-	struct bio *bio = (struct bio *)r_ctx->private;
-
-	pblk_end_user_read(bio, rqd->error);
-	__pblk_end_io_read(pblk, rqd, true);
-}
-
-static void pblk_read_rq(struct pblk *pblk, struct nvm_rq *rqd, struct bio *bio,
-			 sector_t lba, bool *from_cache)
-{
-	struct pblk_sec_meta *meta = pblk_get_meta(pblk, rqd->meta_list, 0);
-	struct ppa_addr ppa;
-
-	pblk_lookup_l2p_seq(pblk, &ppa, lba, 1, from_cache);
-
-#ifdef CONFIG_NVM_PBLK_DEBUG
-	atomic_long_inc(&pblk->inflight_reads);
-#endif
-
-retry:
-	if (pblk_ppa_empty(ppa)) {
-		__le64 addr_empty = cpu_to_le64(ADDR_EMPTY);
-
-		meta->lba = addr_empty;
-		return;
-	}
-
-	/* Try to read from write buffer. The address is later checked on the
-	 * write buffer to prevent retrieving overwritten data.
-	 */
-	if (pblk_addr_in_cache(ppa)) {
-		if (!pblk_read_from_cache(pblk, bio, lba, ppa)) {
-			pblk_lookup_l2p_seq(pblk, &ppa, lba, 1, from_cache);
-			goto retry;
-		}
-
-		meta->lba = cpu_to_le64(lba);
-
-#ifdef CONFIG_NVM_PBLK_DEBUG
-		atomic_long_inc(&pblk->cache_reads);
-#endif
-	} else {
-		rqd->ppa_addr = ppa;
-	}
-}
-
-void pblk_submit_read(struct pblk *pblk, struct bio *bio)
-{
-	sector_t blba = pblk_get_lba(bio);
-	unsigned int nr_secs = pblk_get_secs(bio);
-	bool from_cache;
-	struct pblk_g_ctx *r_ctx;
-	struct nvm_rq *rqd;
-	struct bio *int_bio, *split_bio;
-	unsigned long start_time;
-
-	start_time = bio_start_io_acct(bio);
-
-	rqd = pblk_alloc_rqd(pblk, PBLK_READ);
-
-	rqd->opcode = NVM_OP_PREAD;
-	rqd->nr_ppas = nr_secs;
-	rqd->private = pblk;
-	rqd->end_io = pblk_end_io_read;
-
-	r_ctx = nvm_rq_to_pdu(rqd);
-	r_ctx->start_time = start_time;
-	r_ctx->lba = blba;
-
-	if (pblk_alloc_rqd_meta(pblk, rqd)) {
-		bio_io_error(bio);
-		pblk_free_rqd(pblk, rqd, PBLK_READ);
-		return;
-	}
-
-	/* Clone read bio to deal internally with:
-	 * -read errors when reading from drive
-	 * -bio_advance() calls during cache reads
-	 */
-	int_bio = bio_clone_fast(bio, GFP_KERNEL, &pblk_bio_set);
-
-	if (nr_secs > 1)
-		nr_secs = pblk_read_ppalist_rq(pblk, rqd, int_bio, blba,
-						&from_cache);
-	else
-		pblk_read_rq(pblk, rqd, int_bio, blba, &from_cache);
-
-split_retry:
-	r_ctx->private = bio; /* original bio */
-	rqd->bio = int_bio; /* internal bio */
-
-	if (from_cache && nr_secs == rqd->nr_ppas) {
-		/* All data was read from cache, we can complete the IO. */
-		pblk_end_user_read(bio, 0);
-		atomic_inc(&pblk->inflight_io);
-		__pblk_end_io_read(pblk, rqd, false);
-	} else if (nr_secs != rqd->nr_ppas) {
-		/* The read bio request could be partially filled by the write
-		 * buffer, but there are some holes that need to be read from
-		 * the drive. In order to handle this, we will use block layer
-		 * mechanism to split this request in to smaller ones and make
-		 * a chain of it.
-		 */
-		split_bio = bio_split(bio, nr_secs * NR_PHY_IN_LOG, GFP_KERNEL,
-					&pblk_bio_set);
-		bio_chain(split_bio, bio);
-		submit_bio_noacct(bio);
-
-		/* New bio contains first N sectors of the previous one, so
-		 * we can continue to use existing rqd, but we need to shrink
-		 * the number of PPAs in it. New bio is also guaranteed that
-		 * it contains only either data from cache or from drive, newer
-		 * mix of them.
-		 */
-		bio = split_bio;
-		rqd->nr_ppas = nr_secs;
-		if (rqd->nr_ppas == 1)
-			rqd->ppa_addr = rqd->ppa_list[0];
-
-		/* Recreate int_bio - existing might have some needed internal
-		 * fields modified already.
-		 */
-		bio_put(int_bio);
-		int_bio = bio_clone_fast(bio, GFP_KERNEL, &pblk_bio_set);
-		goto split_retry;
-	} else if (pblk_submit_io(pblk, rqd, NULL)) {
-		/* Submitting IO to drive failed, let's report an error */
-		rqd->error = -ENODEV;
-		pblk_end_io_read(rqd);
-	}
-}
-
-static int read_ppalist_rq_gc(struct pblk *pblk, struct nvm_rq *rqd,
-			      struct pblk_line *line, u64 *lba_list,
-			      u64 *paddr_list_gc, unsigned int nr_secs)
-{
-	struct ppa_addr ppa_list_l2p[NVM_MAX_VLBA];
-	struct ppa_addr ppa_gc;
-	int valid_secs = 0;
-	int i;
-
-	pblk_lookup_l2p_rand(pblk, ppa_list_l2p, lba_list, nr_secs);
-
-	for (i = 0; i < nr_secs; i++) {
-		if (lba_list[i] == ADDR_EMPTY)
-			continue;
-
-		ppa_gc = addr_to_gen_ppa(pblk, paddr_list_gc[i], line->id);
-		if (!pblk_ppa_comp(ppa_list_l2p[i], ppa_gc)) {
-			paddr_list_gc[i] = lba_list[i] = ADDR_EMPTY;
-			continue;
-		}
-
-		rqd->ppa_list[valid_secs++] = ppa_list_l2p[i];
-	}
-
-#ifdef CONFIG_NVM_PBLK_DEBUG
-	atomic_long_add(valid_secs, &pblk->inflight_reads);
-#endif
-
-	return valid_secs;
-}
-
-static int read_rq_gc(struct pblk *pblk, struct nvm_rq *rqd,
-		      struct pblk_line *line, sector_t lba,
-		      u64 paddr_gc)
-{
-	struct ppa_addr ppa_l2p, ppa_gc;
-	int valid_secs = 0;
-
-	if (lba == ADDR_EMPTY)
-		goto out;
-
-	/* logic error: lba out-of-bounds */
-	if (lba >= pblk->capacity) {
-		WARN(1, "pblk: read lba out of bounds\n");
-		goto out;
-	}
-
-	spin_lock(&pblk->trans_lock);
-	ppa_l2p = pblk_trans_map_get(pblk, lba);
-	spin_unlock(&pblk->trans_lock);
-
-	ppa_gc = addr_to_gen_ppa(pblk, paddr_gc, line->id);
-	if (!pblk_ppa_comp(ppa_l2p, ppa_gc))
-		goto out;
-
-	rqd->ppa_addr = ppa_l2p;
-	valid_secs = 1;
-
-#ifdef CONFIG_NVM_PBLK_DEBUG
-	atomic_long_inc(&pblk->inflight_reads);
-#endif
-
-out:
-	return valid_secs;
-}
-
-int pblk_submit_read_gc(struct pblk *pblk, struct pblk_gc_rq *gc_rq)
-{
-	struct nvm_rq rqd;
-	int ret = NVM_IO_OK;
-
-	memset(&rqd, 0, sizeof(struct nvm_rq));
-
-	ret = pblk_alloc_rqd_meta(pblk, &rqd);
-	if (ret)
-		return ret;
-
-	if (gc_rq->nr_secs > 1) {
-		gc_rq->secs_to_gc = read_ppalist_rq_gc(pblk, &rqd, gc_rq->line,
-							gc_rq->lba_list,
-							gc_rq->paddr_list,
-							gc_rq->nr_secs);
-		if (gc_rq->secs_to_gc == 1)
-			rqd.ppa_addr = rqd.ppa_list[0];
-	} else {
-		gc_rq->secs_to_gc = read_rq_gc(pblk, &rqd, gc_rq->line,
-							gc_rq->lba_list[0],
-							gc_rq->paddr_list[0]);
-	}
-
-	if (!(gc_rq->secs_to_gc))
-		goto out;
-
-	rqd.opcode = NVM_OP_PREAD;
-	rqd.nr_ppas = gc_rq->secs_to_gc;
-
-	if (pblk_submit_io_sync(pblk, &rqd, gc_rq->data)) {
-		ret = -EIO;
-		goto err_free_dma;
-	}
-
-	pblk_read_check_rand(pblk, &rqd, gc_rq->lba_list, gc_rq->nr_secs);
-
-	atomic_dec(&pblk->inflight_io);
-
-	if (rqd.error) {
-		atomic_long_inc(&pblk->read_failed_gc);
-#ifdef CONFIG_NVM_PBLK_DEBUG
-		pblk_print_failed_rqd(pblk, &rqd, rqd.error);
-#endif
-	}
-
-#ifdef CONFIG_NVM_PBLK_DEBUG
-	atomic_long_add(gc_rq->secs_to_gc, &pblk->sync_reads);
-	atomic_long_add(gc_rq->secs_to_gc, &pblk->recov_gc_reads);
-	atomic_long_sub(gc_rq->secs_to_gc, &pblk->inflight_reads);
-#endif
-
-out:
-	pblk_free_rqd_meta(pblk, &rqd);
-	return ret;
-
-err_free_dma:
-	pblk_free_rqd_meta(pblk, &rqd);
-	return ret;
-}
diff --git a/drivers/lightnvm/pblk-recovery.c b/drivers/lightnvm/pblk-recovery.c
deleted file mode 100644
index 0e6f0c76e930..000000000000
--- a/drivers/lightnvm/pblk-recovery.c
+++ /dev/null
@@ -1,874 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright (C) 2016 CNEX Labs
- * Initial: Javier Gonzalez <javier@cnexlabs.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License version
- * 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * pblk-recovery.c - pblk's recovery path
- *
- * The L2P recovery path is single threaded as the L2P table is updated in order
- * following the line sequence ID.
- */
-
-#include "pblk.h"
-#include "pblk-trace.h"
-
-int pblk_recov_check_emeta(struct pblk *pblk, struct line_emeta *emeta_buf)
-{
-	u32 crc;
-
-	crc = pblk_calc_emeta_crc(pblk, emeta_buf);
-	if (le32_to_cpu(emeta_buf->crc) != crc)
-		return 1;
-
-	if (le32_to_cpu(emeta_buf->header.identifier) != PBLK_MAGIC)
-		return 1;
-
-	return 0;
-}
-
-static int pblk_recov_l2p_from_emeta(struct pblk *pblk, struct pblk_line *line)
-{
-	struct nvm_tgt_dev *dev = pblk->dev;
-	struct nvm_geo *geo = &dev->geo;
-	struct pblk_line_meta *lm = &pblk->lm;
-	struct pblk_emeta *emeta = line->emeta;
-	struct line_emeta *emeta_buf = emeta->buf;
-	__le64 *lba_list;
-	u64 data_start, data_end;
-	u64 nr_valid_lbas, nr_lbas = 0;
-	u64 i;
-
-	lba_list = emeta_to_lbas(pblk, emeta_buf);
-	if (!lba_list)
-		return 1;
-
-	data_start = pblk_line_smeta_start(pblk, line) + lm->smeta_sec;
-	data_end = line->emeta_ssec;
-	nr_valid_lbas = le64_to_cpu(emeta_buf->nr_valid_lbas);
-
-	for (i = data_start; i < data_end; i++) {
-		struct ppa_addr ppa;
-		int pos;
-
-		ppa = addr_to_gen_ppa(pblk, i, line->id);
-		pos = pblk_ppa_to_pos(geo, ppa);
-
-		/* Do not update bad blocks */
-		if (test_bit(pos, line->blk_bitmap))
-			continue;
-
-		if (le64_to_cpu(lba_list[i]) == ADDR_EMPTY) {
-			spin_lock(&line->lock);
-			if (test_and_set_bit(i, line->invalid_bitmap))
-				WARN_ONCE(1, "pblk: rec. double invalidate:\n");
-			else
-				le32_add_cpu(line->vsc, -1);
-			spin_unlock(&line->lock);
-
-			continue;
-		}
-
-		pblk_update_map(pblk, le64_to_cpu(lba_list[i]), ppa);
-		nr_lbas++;
-	}
-
-	if (nr_valid_lbas != nr_lbas)
-		pblk_err(pblk, "line %d - inconsistent lba list(%llu/%llu)\n",
-				line->id, nr_valid_lbas, nr_lbas);
-
-	line->left_msecs = 0;
-
-	return 0;
-}
-
-static void pblk_update_line_wp(struct pblk *pblk, struct pblk_line *line,
-				u64 written_secs)
-{
-	struct pblk_line_mgmt *l_mg = &pblk->l_mg;
-	int i;
-
-	for (i = 0; i < written_secs; i += pblk->min_write_pgs)
-		__pblk_alloc_page(pblk, line, pblk->min_write_pgs);
-
-	spin_lock(&l_mg->free_lock);
-	if (written_secs > line->left_msecs) {
-		/*
-		 * We have all data sectors written
-		 * and some emeta sectors written too.
-		 */
-		line->left_msecs = 0;
-	} else {
-		/* We have only some data sectors written. */
-		line->left_msecs -= written_secs;
-	}
-	spin_unlock(&l_mg->free_lock);
-}
-
-static u64 pblk_sec_in_open_line(struct pblk *pblk, struct pblk_line *line)
-{
-	struct pblk_line_meta *lm = &pblk->lm;
-	int nr_bb = bitmap_weight(line->blk_bitmap, lm->blk_per_line);
-	u64 written_secs = 0;
-	int valid_chunks = 0;
-	int i;
-
-	for (i = 0; i < lm->blk_per_line; i++) {
-		struct nvm_chk_meta *chunk = &line->chks[i];
-
-		if (chunk->state & NVM_CHK_ST_OFFLINE)
-			continue;
-
-		written_secs += chunk->wp;
-		valid_chunks++;
-	}
-
-	if (lm->blk_per_line - nr_bb != valid_chunks)
-		pblk_err(pblk, "recovery line %d is bad\n", line->id);
-
-	pblk_update_line_wp(pblk, line, written_secs - lm->smeta_sec);
-
-	return written_secs;
-}
-
-struct pblk_recov_alloc {
-	struct ppa_addr *ppa_list;
-	void *meta_list;
-	struct nvm_rq *rqd;
-	void *data;
-	dma_addr_t dma_ppa_list;
-	dma_addr_t dma_meta_list;
-};
-
-static void pblk_recov_complete(struct kref *ref)
-{
-	struct pblk_pad_rq *pad_rq = container_of(ref, struct pblk_pad_rq, ref);
-
-	complete(&pad_rq->wait);
-}
-
-static void pblk_end_io_recov(struct nvm_rq *rqd)
-{
-	struct ppa_addr *ppa_list = nvm_rq_to_ppa_list(rqd);
-	struct pblk_pad_rq *pad_rq = rqd->private;
-	struct pblk *pblk = pad_rq->pblk;
-
-	pblk_up_chunk(pblk, ppa_list[0]);
-
-	pblk_free_rqd(pblk, rqd, PBLK_WRITE_INT);
-
-	atomic_dec(&pblk->inflight_io);
-	kref_put(&pad_rq->ref, pblk_recov_complete);
-}
-
-/* pad line using line bitmap.  */
-static int pblk_recov_pad_line(struct pblk *pblk, struct pblk_line *line,
-			       int left_ppas)
-{
-	struct nvm_tgt_dev *dev = pblk->dev;
-	struct nvm_geo *geo = &dev->geo;
-	void *meta_list;
-	struct pblk_pad_rq *pad_rq;
-	struct nvm_rq *rqd;
-	struct ppa_addr *ppa_list;
-	void *data;
-	__le64 *lba_list = emeta_to_lbas(pblk, line->emeta->buf);
-	u64 w_ptr = line->cur_sec;
-	int left_line_ppas, rq_ppas;
-	int i, j;
-	int ret = 0;
-
-	spin_lock(&line->lock);
-	left_line_ppas = line->left_msecs;
-	spin_unlock(&line->lock);
-
-	pad_rq = kmalloc(sizeof(struct pblk_pad_rq), GFP_KERNEL);
-	if (!pad_rq)
-		return -ENOMEM;
-
-	data = vzalloc(array_size(pblk->max_write_pgs, geo->csecs));
-	if (!data) {
-		ret = -ENOMEM;
-		goto free_rq;
-	}
-
-	pad_rq->pblk = pblk;
-	init_completion(&pad_rq->wait);
-	kref_init(&pad_rq->ref);
-
-next_pad_rq:
-	rq_ppas = pblk_calc_secs(pblk, left_ppas, 0, false);
-	if (rq_ppas < pblk->min_write_pgs) {
-		pblk_err(pblk, "corrupted pad line %d\n", line->id);
-		goto fail_complete;
-	}
-
-	rqd = pblk_alloc_rqd(pblk, PBLK_WRITE_INT);
-
-	ret = pblk_alloc_rqd_meta(pblk, rqd);
-	if (ret) {
-		pblk_free_rqd(pblk, rqd, PBLK_WRITE_INT);
-		goto fail_complete;
-	}
-
-	rqd->bio = NULL;
-	rqd->opcode = NVM_OP_PWRITE;
-	rqd->is_seq = 1;
-	rqd->nr_ppas = rq_ppas;
-	rqd->end_io = pblk_end_io_recov;
-	rqd->private = pad_rq;
-
-	ppa_list = nvm_rq_to_ppa_list(rqd);
-	meta_list = rqd->meta_list;
-
-	for (i = 0; i < rqd->nr_ppas; ) {
-		struct ppa_addr ppa;
-		int pos;
-
-		w_ptr = pblk_alloc_page(pblk, line, pblk->min_write_pgs);
-		ppa = addr_to_gen_ppa(pblk, w_ptr, line->id);
-		pos = pblk_ppa_to_pos(geo, ppa);
-
-		while (test_bit(pos, line->blk_bitmap)) {
-			w_ptr += pblk->min_write_pgs;
-			ppa = addr_to_gen_ppa(pblk, w_ptr, line->id);
-			pos = pblk_ppa_to_pos(geo, ppa);
-		}
-
-		for (j = 0; j < pblk->min_write_pgs; j++, i++, w_ptr++) {
-			struct ppa_addr dev_ppa;
-			struct pblk_sec_meta *meta;
-			__le64 addr_empty = cpu_to_le64(ADDR_EMPTY);
-
-			dev_ppa = addr_to_gen_ppa(pblk, w_ptr, line->id);
-
-			pblk_map_invalidate(pblk, dev_ppa);
-			lba_list[w_ptr] = addr_empty;
-			meta = pblk_get_meta(pblk, meta_list, i);
-			meta->lba = addr_empty;
-			ppa_list[i] = dev_ppa;
-		}
-	}
-
-	kref_get(&pad_rq->ref);
-	pblk_down_chunk(pblk, ppa_list[0]);
-
-	ret = pblk_submit_io(pblk, rqd, data);
-	if (ret) {
-		pblk_err(pblk, "I/O submission failed: %d\n", ret);
-		pblk_up_chunk(pblk, ppa_list[0]);
-		kref_put(&pad_rq->ref, pblk_recov_complete);
-		pblk_free_rqd(pblk, rqd, PBLK_WRITE_INT);
-		goto fail_complete;
-	}
-
-	left_line_ppas -= rq_ppas;
-	left_ppas -= rq_ppas;
-	if (left_ppas && left_line_ppas)
-		goto next_pad_rq;
-
-fail_complete:
-	kref_put(&pad_rq->ref, pblk_recov_complete);
-	wait_for_completion(&pad_rq->wait);
-
-	if (!pblk_line_is_full(line))
-		pblk_err(pblk, "corrupted padded line: %d\n", line->id);
-
-	vfree(data);
-free_rq:
-	kfree(pad_rq);
-	return ret;
-}
-
-static int pblk_pad_distance(struct pblk *pblk, struct pblk_line *line)
-{
-	struct nvm_tgt_dev *dev = pblk->dev;
-	struct nvm_geo *geo = &dev->geo;
-	int distance = geo->mw_cunits * geo->all_luns * geo->ws_opt;
-
-	return (distance > line->left_msecs) ? line->left_msecs : distance;
-}
-
-/* Return a chunk belonging to a line by stripe(write order) index */
-static struct nvm_chk_meta *pblk_get_stripe_chunk(struct pblk *pblk,
-						  struct pblk_line *line,
-						  int index)
-{
-	struct nvm_tgt_dev *dev = pblk->dev;
-	struct nvm_geo *geo = &dev->geo;
-	struct pblk_lun *rlun;
-	struct ppa_addr ppa;
-	int pos;
-
-	rlun = &pblk->luns[index];
-	ppa = rlun->bppa;
-	pos = pblk_ppa_to_pos(geo, ppa);
-
-	return &line->chks[pos];
-}
-
-static int pblk_line_wps_are_unbalanced(struct pblk *pblk,
-				      struct pblk_line *line)
-{
-	struct pblk_line_meta *lm = &pblk->lm;
-	int blk_in_line = lm->blk_per_line;
-	struct nvm_chk_meta *chunk;
-	u64 max_wp, min_wp;
-	int i;
-
-	i = find_first_zero_bit(line->blk_bitmap, blk_in_line);
-
-	/* If there is one or zero good chunks in the line,
-	 * the write pointers can't be unbalanced.
-	 */
-	if (i >= (blk_in_line - 1))
-		return 0;
-
-	chunk = pblk_get_stripe_chunk(pblk, line, i);
-	max_wp = chunk->wp;
-	if (max_wp > pblk->max_write_pgs)
-		min_wp = max_wp - pblk->max_write_pgs;
-	else
-		min_wp = 0;
-
-	i = find_next_zero_bit(line->blk_bitmap, blk_in_line, i + 1);
-	while (i < blk_in_line) {
-		chunk = pblk_get_stripe_chunk(pblk, line, i);
-		if (chunk->wp > max_wp || chunk->wp < min_wp)
-			return 1;
-
-		i = find_next_zero_bit(line->blk_bitmap, blk_in_line, i + 1);
-	}
-
-	return 0;
-}
-
-static int pblk_recov_scan_oob(struct pblk *pblk, struct pblk_line *line,
-			       struct pblk_recov_alloc p)
-{
-	struct nvm_tgt_dev *dev = pblk->dev;
-	struct pblk_line_meta *lm = &pblk->lm;
-	struct nvm_geo *geo = &dev->geo;
-	struct ppa_addr *ppa_list;
-	void *meta_list;
-	struct nvm_rq *rqd;
-	void *data;
-	dma_addr_t dma_ppa_list, dma_meta_list;
-	__le64 *lba_list;
-	u64 paddr = pblk_line_smeta_start(pblk, line) + lm->smeta_sec;
-	bool padded = false;
-	int rq_ppas;
-	int i, j;
-	int ret;
-	u64 left_ppas = pblk_sec_in_open_line(pblk, line) - lm->smeta_sec;
-
-	if (pblk_line_wps_are_unbalanced(pblk, line))
-		pblk_warn(pblk, "recovering unbalanced line (%d)\n", line->id);
-
-	ppa_list = p.ppa_list;
-	meta_list = p.meta_list;
-	rqd = p.rqd;
-	data = p.data;
-	dma_ppa_list = p.dma_ppa_list;
-	dma_meta_list = p.dma_meta_list;
-
-	lba_list = emeta_to_lbas(pblk, line->emeta->buf);
-
-next_rq:
-	memset(rqd, 0, pblk_g_rq_size);
-
-	rq_ppas = pblk_calc_secs(pblk, left_ppas, 0, false);
-	if (!rq_ppas)
-		rq_ppas = pblk->min_write_pgs;
-
-retry_rq:
-	rqd->bio = NULL;
-	rqd->opcode = NVM_OP_PREAD;
-	rqd->meta_list = meta_list;
-	rqd->nr_ppas = rq_ppas;
-	rqd->ppa_list = ppa_list;
-	rqd->dma_ppa_list = dma_ppa_list;
-	rqd->dma_meta_list = dma_meta_list;
-	ppa_list = nvm_rq_to_ppa_list(rqd);
-
-	if (pblk_io_aligned(pblk, rq_ppas))
-		rqd->is_seq = 1;
-
-	for (i = 0; i < rqd->nr_ppas; ) {
-		struct ppa_addr ppa;
-		int pos;
-
-		ppa = addr_to_gen_ppa(pblk, paddr, line->id);
-		pos = pblk_ppa_to_pos(geo, ppa);
-
-		while (test_bit(pos, line->blk_bitmap)) {
-			paddr += pblk->min_write_pgs;
-			ppa = addr_to_gen_ppa(pblk, paddr, line->id);
-			pos = pblk_ppa_to_pos(geo, ppa);
-		}
-
-		for (j = 0; j < pblk->min_write_pgs; j++, i++)
-			ppa_list[i] =
-				addr_to_gen_ppa(pblk, paddr + j, line->id);
-	}
-
-	ret = pblk_submit_io_sync(pblk, rqd, data);
-	if (ret) {
-		pblk_err(pblk, "I/O submission failed: %d\n", ret);
-		return ret;
-	}
-
-	atomic_dec(&pblk->inflight_io);
-
-	/* If a read fails, do a best effort by padding the line and retrying */
-	if (rqd->error && rqd->error != NVM_RSP_WARN_HIGHECC) {
-		int pad_distance, ret;
-
-		if (padded) {
-			pblk_log_read_err(pblk, rqd);
-			return -EINTR;
-		}
-
-		pad_distance = pblk_pad_distance(pblk, line);
-		ret = pblk_recov_pad_line(pblk, line, pad_distance);
-		if (ret) {
-			return ret;
-		}
-
-		padded = true;
-		goto retry_rq;
-	}
-
-	pblk_get_packed_meta(pblk, rqd);
-
-	for (i = 0; i < rqd->nr_ppas; i++) {
-		struct pblk_sec_meta *meta = pblk_get_meta(pblk, meta_list, i);
-		u64 lba = le64_to_cpu(meta->lba);
-
-		lba_list[paddr++] = cpu_to_le64(lba);
-
-		if (lba == ADDR_EMPTY || lba >= pblk->capacity)
-			continue;
-
-		line->nr_valid_lbas++;
-		pblk_update_map(pblk, lba, ppa_list[i]);
-	}
-
-	left_ppas -= rq_ppas;
-	if (left_ppas > 0)
-		goto next_rq;
-
-#ifdef CONFIG_NVM_PBLK_DEBUG
-	WARN_ON(padded && !pblk_line_is_full(line));
-#endif
-
-	return 0;
-}
-
-/* Scan line for lbas on out of bound area */
-static int pblk_recov_l2p_from_oob(struct pblk *pblk, struct pblk_line *line)
-{
-	struct nvm_tgt_dev *dev = pblk->dev;
-	struct nvm_geo *geo = &dev->geo;
-	struct nvm_rq *rqd;
-	struct ppa_addr *ppa_list;
-	void *meta_list;
-	struct pblk_recov_alloc p;
-	void *data;
-	dma_addr_t dma_ppa_list, dma_meta_list;
-	int ret = 0;
-
-	meta_list = nvm_dev_dma_alloc(dev->parent, GFP_KERNEL, &dma_meta_list);
-	if (!meta_list)
-		return -ENOMEM;
-
-	ppa_list = (void *)(meta_list) + pblk_dma_meta_size(pblk);
-	dma_ppa_list = dma_meta_list + pblk_dma_meta_size(pblk);
-
-	data = kcalloc(pblk->max_write_pgs, geo->csecs, GFP_KERNEL);
-	if (!data) {
-		ret = -ENOMEM;
-		goto free_meta_list;
-	}
-
-	rqd = mempool_alloc(&pblk->r_rq_pool, GFP_KERNEL);
-	memset(rqd, 0, pblk_g_rq_size);
-
-	p.ppa_list = ppa_list;
-	p.meta_list = meta_list;
-	p.rqd = rqd;
-	p.data = data;
-	p.dma_ppa_list = dma_ppa_list;
-	p.dma_meta_list = dma_meta_list;
-
-	ret = pblk_recov_scan_oob(pblk, line, p);
-	if (ret) {
-		pblk_err(pblk, "could not recover L2P form OOB\n");
-		goto out;
-	}
-
-	if (pblk_line_is_full(line))
-		pblk_line_recov_close(pblk, line);
-
-out:
-	mempool_free(rqd, &pblk->r_rq_pool);
-	kfree(data);
-free_meta_list:
-	nvm_dev_dma_free(dev->parent, meta_list, dma_meta_list);
-
-	return ret;
-}
-
-/* Insert lines ordered by sequence number (seq_num) on list */
-static void pblk_recov_line_add_ordered(struct list_head *head,
-					struct pblk_line *line)
-{
-	struct pblk_line *t = NULL;
-
-	list_for_each_entry(t, head, list)
-		if (t->seq_nr > line->seq_nr)
-			break;
-
-	__list_add(&line->list, t->list.prev, &t->list);
-}
-
-static u64 pblk_line_emeta_start(struct pblk *pblk, struct pblk_line *line)
-{
-	struct nvm_tgt_dev *dev = pblk->dev;
-	struct nvm_geo *geo = &dev->geo;
-	struct pblk_line_meta *lm = &pblk->lm;
-	unsigned int emeta_secs;
-	u64 emeta_start;
-	struct ppa_addr ppa;
-	int pos;
-
-	emeta_secs = lm->emeta_sec[0];
-	emeta_start = lm->sec_per_line;
-
-	while (emeta_secs) {
-		emeta_start--;
-		ppa = addr_to_gen_ppa(pblk, emeta_start, line->id);
-		pos = pblk_ppa_to_pos(geo, ppa);
-		if (!test_bit(pos, line->blk_bitmap))
-			emeta_secs--;
-	}
-
-	return emeta_start;
-}
-
-static int pblk_recov_check_line_version(struct pblk *pblk,
-					 struct line_emeta *emeta)
-{
-	struct line_header *header = &emeta->header;
-
-	if (header->version_major != EMETA_VERSION_MAJOR) {
-		pblk_err(pblk, "line major version mismatch: %d, expected: %d\n",
-			 header->version_major, EMETA_VERSION_MAJOR);
-		return 1;
-	}
-
-#ifdef CONFIG_NVM_PBLK_DEBUG
-	if (header->version_minor > EMETA_VERSION_MINOR)
-		pblk_info(pblk, "newer line minor version found: %d\n",
-				header->version_minor);
-#endif
-
-	return 0;
-}
-
-static void pblk_recov_wa_counters(struct pblk *pblk,
-				   struct line_emeta *emeta)
-{
-	struct pblk_line_meta *lm = &pblk->lm;
-	struct line_header *header = &emeta->header;
-	struct wa_counters *wa = emeta_to_wa(lm, emeta);
-
-	/* WA counters were introduced in emeta version 0.2 */
-	if (header->version_major > 0 || header->version_minor >= 2) {
-		u64 user = le64_to_cpu(wa->user);
-		u64 pad = le64_to_cpu(wa->pad);
-		u64 gc = le64_to_cpu(wa->gc);
-
-		atomic64_set(&pblk->user_wa, user);
-		atomic64_set(&pblk->pad_wa, pad);
-		atomic64_set(&pblk->gc_wa, gc);
-
-		pblk->user_rst_wa = user;
-		pblk->pad_rst_wa = pad;
-		pblk->gc_rst_wa = gc;
-	}
-}
-
-static int pblk_line_was_written(struct pblk_line *line,
-				 struct pblk *pblk)
-{
-
-	struct pblk_line_meta *lm = &pblk->lm;
-	struct nvm_tgt_dev *dev = pblk->dev;
-	struct nvm_geo *geo = &dev->geo;
-	struct nvm_chk_meta *chunk;
-	struct ppa_addr bppa;
-	int smeta_blk;
-
-	if (line->state == PBLK_LINESTATE_BAD)
-		return 0;
-
-	smeta_blk = find_first_zero_bit(line->blk_bitmap, lm->blk_per_line);
-	if (smeta_blk >= lm->blk_per_line)
-		return 0;
-
-	bppa = pblk->luns[smeta_blk].bppa;
-	chunk = &line->chks[pblk_ppa_to_pos(geo, bppa)];
-
-	if (chunk->state & NVM_CHK_ST_CLOSED ||
-	    (chunk->state & NVM_CHK_ST_OPEN
-	     && chunk->wp >= lm->smeta_sec))
-		return 1;
-
-	return 0;
-}
-
-static bool pblk_line_is_open(struct pblk *pblk, struct pblk_line *line)
-{
-	struct pblk_line_meta *lm = &pblk->lm;
-	int i;
-
-	for (i = 0; i < lm->blk_per_line; i++)
-		if (line->chks[i].state & NVM_CHK_ST_OPEN)
-			return true;
-
-	return false;
-}
-
-struct pblk_line *pblk_recov_l2p(struct pblk *pblk)
-{
-	struct pblk_line_meta *lm = &pblk->lm;
-	struct pblk_line_mgmt *l_mg = &pblk->l_mg;
-	struct pblk_line *line, *tline, *data_line = NULL;
-	struct pblk_smeta *smeta;
-	struct pblk_emeta *emeta;
-	struct line_smeta *smeta_buf;
-	int found_lines = 0, recovered_lines = 0, open_lines = 0;
-	int is_next = 0;
-	int meta_line;
-	int i, valid_uuid = 0;
-	LIST_HEAD(recov_list);
-
-	/* TODO: Implement FTL snapshot */
-
-	/* Scan recovery - takes place when FTL snapshot fails */
-	spin_lock(&l_mg->free_lock);
-	meta_line = find_first_zero_bit(&l_mg->meta_bitmap, PBLK_DATA_LINES);
-	set_bit(meta_line, &l_mg->meta_bitmap);
-	smeta = l_mg->sline_meta[meta_line];
-	emeta = l_mg->eline_meta[meta_line];
-	smeta_buf = (struct line_smeta *)smeta;
-	spin_unlock(&l_mg->free_lock);
-
-	/* Order data lines using their sequence number */
-	for (i = 0; i < l_mg->nr_lines; i++) {
-		u32 crc;
-
-		line = &pblk->lines[i];
-
-		memset(smeta, 0, lm->smeta_len);
-		line->smeta = smeta;
-		line->lun_bitmap = ((void *)(smeta_buf)) +
-						sizeof(struct line_smeta);
-
-		if (!pblk_line_was_written(line, pblk))
-			continue;
-
-		/* Lines that cannot be read are assumed as not written here */
-		if (pblk_line_smeta_read(pblk, line))
-			continue;
-
-		crc = pblk_calc_smeta_crc(pblk, smeta_buf);
-		if (le32_to_cpu(smeta_buf->crc) != crc)
-			continue;
-
-		if (le32_to_cpu(smeta_buf->header.identifier) != PBLK_MAGIC)
-			continue;
-
-		if (smeta_buf->header.version_major != SMETA_VERSION_MAJOR) {
-			pblk_err(pblk, "found incompatible line version %u\n",
-					smeta_buf->header.version_major);
-			return ERR_PTR(-EINVAL);
-		}
-
-		/* The first valid instance uuid is used for initialization */
-		if (!valid_uuid) {
-			import_guid(&pblk->instance_uuid, smeta_buf->header.uuid);
-			valid_uuid = 1;
-		}
-
-		if (!guid_equal(&pblk->instance_uuid,
-				(guid_t *)&smeta_buf->header.uuid)) {
-			pblk_debug(pblk, "ignore line %u due to uuid mismatch\n",
-					i);
-			continue;
-		}
-
-		/* Update line metadata */
-		spin_lock(&line->lock);
-		line->id = le32_to_cpu(smeta_buf->header.id);
-		line->type = le16_to_cpu(smeta_buf->header.type);
-		line->seq_nr = le64_to_cpu(smeta_buf->seq_nr);
-		spin_unlock(&line->lock);
-
-		/* Update general metadata */
-		spin_lock(&l_mg->free_lock);
-		if (line->seq_nr >= l_mg->d_seq_nr)
-			l_mg->d_seq_nr = line->seq_nr + 1;
-		l_mg->nr_free_lines--;
-		spin_unlock(&l_mg->free_lock);
-
-		if (pblk_line_recov_alloc(pblk, line))
-			goto out;
-
-		pblk_recov_line_add_ordered(&recov_list, line);
-		found_lines++;
-		pblk_debug(pblk, "recovering data line %d, seq:%llu\n",
-						line->id, smeta_buf->seq_nr);
-	}
-
-	if (!found_lines) {
-		guid_gen(&pblk->instance_uuid);
-
-		spin_lock(&l_mg->free_lock);
-		WARN_ON_ONCE(!test_and_clear_bit(meta_line,
-							&l_mg->meta_bitmap));
-		spin_unlock(&l_mg->free_lock);
-
-		goto out;
-	}
-
-	/* Verify closed blocks and recover this portion of L2P table*/
-	list_for_each_entry_safe(line, tline, &recov_list, list) {
-		recovered_lines++;
-
-		line->emeta_ssec = pblk_line_emeta_start(pblk, line);
-		line->emeta = emeta;
-		memset(line->emeta->buf, 0, lm->emeta_len[0]);
-
-		if (pblk_line_is_open(pblk, line)) {
-			pblk_recov_l2p_from_oob(pblk, line);
-			goto next;
-		}
-
-		if (pblk_line_emeta_read(pblk, line, line->emeta->buf)) {
-			pblk_recov_l2p_from_oob(pblk, line);
-			goto next;
-		}
-
-		if (pblk_recov_check_emeta(pblk, line->emeta->buf)) {
-			pblk_recov_l2p_from_oob(pblk, line);
-			goto next;
-		}
-
-		if (pblk_recov_check_line_version(pblk, line->emeta->buf))
-			return ERR_PTR(-EINVAL);
-
-		pblk_recov_wa_counters(pblk, line->emeta->buf);
-
-		if (pblk_recov_l2p_from_emeta(pblk, line))
-			pblk_recov_l2p_from_oob(pblk, line);
-
-next:
-		if (pblk_line_is_full(line)) {
-			struct list_head *move_list;
-
-			spin_lock(&line->lock);
-			line->state = PBLK_LINESTATE_CLOSED;
-			trace_pblk_line_state(pblk_disk_name(pblk), line->id,
-					line->state);
-			move_list = pblk_line_gc_list(pblk, line);
-			spin_unlock(&line->lock);
-
-			spin_lock(&l_mg->gc_lock);
-			list_move_tail(&line->list, move_list);
-			spin_unlock(&l_mg->gc_lock);
-
-			mempool_free(line->map_bitmap, l_mg->bitmap_pool);
-			line->map_bitmap = NULL;
-			line->smeta = NULL;
-			line->emeta = NULL;
-		} else {
-			spin_lock(&line->lock);
-			line->state = PBLK_LINESTATE_OPEN;
-			spin_unlock(&line->lock);
-
-			line->emeta->mem = 0;
-			atomic_set(&line->emeta->sync, 0);
-
-			trace_pblk_line_state(pblk_disk_name(pblk), line->id,
-					line->state);
-
-			data_line = line;
-			line->meta_line = meta_line;
-
-			open_lines++;
-		}
-	}
-
-	if (!open_lines) {
-		spin_lock(&l_mg->free_lock);
-		WARN_ON_ONCE(!test_and_clear_bit(meta_line,
-							&l_mg->meta_bitmap));
-		spin_unlock(&l_mg->free_lock);
-	} else {
-		spin_lock(&l_mg->free_lock);
-		l_mg->data_line = data_line;
-		/* Allocate next line for preparation */
-		l_mg->data_next = pblk_line_get(pblk);
-		if (l_mg->data_next) {
-			l_mg->data_next->seq_nr = l_mg->d_seq_nr++;
-			l_mg->data_next->type = PBLK_LINETYPE_DATA;
-			is_next = 1;
-		}
-		spin_unlock(&l_mg->free_lock);
-	}
-
-	if (is_next)
-		pblk_line_erase(pblk, l_mg->data_next);
-
-out:
-	if (found_lines != recovered_lines)
-		pblk_err(pblk, "failed to recover all found lines %d/%d\n",
-						found_lines, recovered_lines);
-
-	return data_line;
-}
-
-/*
- * Pad current line
- */
-int pblk_recov_pad(struct pblk *pblk)
-{
-	struct pblk_line *line;
-	struct pblk_line_mgmt *l_mg = &pblk->l_mg;
-	int left_msecs;
-	int ret = 0;
-
-	spin_lock(&l_mg->free_lock);
-	line = l_mg->data_line;
-	left_msecs = line->left_msecs;
-	spin_unlock(&l_mg->free_lock);
-
-	ret = pblk_recov_pad_line(pblk, line, left_msecs);
-	if (ret) {
-		pblk_err(pblk, "tear down padding failed (%d)\n", ret);
-		return ret;
-	}
-
-	pblk_line_close_meta(pblk, line);
-	return ret;
-}
diff --git a/drivers/lightnvm/pblk-rl.c b/drivers/lightnvm/pblk-rl.c
deleted file mode 100644
index a5f8bc2defbc..000000000000
--- a/drivers/lightnvm/pblk-rl.c
+++ /dev/null
@@ -1,254 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright (C) 2016 CNEX Labs
- * Initial release: Javier Gonzalez <javier@cnexlabs.com>
- *                  Matias Bjorling <matias@cnexlabs.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License version
- * 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * pblk-rl.c - pblk's rate limiter for user I/O
- *
- */
-
-#include "pblk.h"
-
-static void pblk_rl_kick_u_timer(struct pblk_rl *rl)
-{
-	mod_timer(&rl->u_timer, jiffies + msecs_to_jiffies(5000));
-}
-
-int pblk_rl_is_limit(struct pblk_rl *rl)
-{
-	int rb_space;
-
-	rb_space = atomic_read(&rl->rb_space);
-
-	return (rb_space == 0);
-}
-
-int pblk_rl_user_may_insert(struct pblk_rl *rl, int nr_entries)
-{
-	int rb_user_cnt = atomic_read(&rl->rb_user_cnt);
-	int rb_space = atomic_read(&rl->rb_space);
-
-	if (unlikely(rb_space >= 0) && (rb_space - nr_entries < 0))
-		return NVM_IO_ERR;
-
-	if (rb_user_cnt >= rl->rb_user_max)
-		return NVM_IO_REQUEUE;
-
-	return NVM_IO_OK;
-}
-
-void pblk_rl_inserted(struct pblk_rl *rl, int nr_entries)
-{
-	int rb_space = atomic_read(&rl->rb_space);
-
-	if (unlikely(rb_space >= 0))
-		atomic_sub(nr_entries, &rl->rb_space);
-}
-
-int pblk_rl_gc_may_insert(struct pblk_rl *rl, int nr_entries)
-{
-	int rb_gc_cnt = atomic_read(&rl->rb_gc_cnt);
-	int rb_user_active;
-
-	/* If there is no user I/O let GC take over space on the write buffer */
-	rb_user_active = READ_ONCE(rl->rb_user_active);
-	return (!(rb_gc_cnt >= rl->rb_gc_max && rb_user_active));
-}
-
-void pblk_rl_user_in(struct pblk_rl *rl, int nr_entries)
-{
-	atomic_add(nr_entries, &rl->rb_user_cnt);
-
-	/* Release user I/O state. Protect from GC */
-	smp_store_release(&rl->rb_user_active, 1);
-	pblk_rl_kick_u_timer(rl);
-}
-
-void pblk_rl_werr_line_in(struct pblk_rl *rl)
-{
-	atomic_inc(&rl->werr_lines);
-}
-
-void pblk_rl_werr_line_out(struct pblk_rl *rl)
-{
-	atomic_dec(&rl->werr_lines);
-}
-
-void pblk_rl_gc_in(struct pblk_rl *rl, int nr_entries)
-{
-	atomic_add(nr_entries, &rl->rb_gc_cnt);
-}
-
-void pblk_rl_out(struct pblk_rl *rl, int nr_user, int nr_gc)
-{
-	atomic_sub(nr_user, &rl->rb_user_cnt);
-	atomic_sub(nr_gc, &rl->rb_gc_cnt);
-}
-
-unsigned long pblk_rl_nr_free_blks(struct pblk_rl *rl)
-{
-	return atomic_read(&rl->free_blocks);
-}
-
-unsigned long pblk_rl_nr_user_free_blks(struct pblk_rl *rl)
-{
-	return atomic_read(&rl->free_user_blocks);
-}
-
-static void __pblk_rl_update_rates(struct pblk_rl *rl,
-				   unsigned long free_blocks)
-{
-	struct pblk *pblk = container_of(rl, struct pblk, rl);
-	int max = rl->rb_budget;
-	int werr_gc_needed = atomic_read(&rl->werr_lines);
-
-	if (free_blocks >= rl->high) {
-		if (werr_gc_needed) {
-			/* Allocate a small budget for recovering
-			 * lines with write errors
-			 */
-			rl->rb_gc_max = 1 << rl->rb_windows_pw;
-			rl->rb_user_max = max - rl->rb_gc_max;
-			rl->rb_state = PBLK_RL_WERR;
-		} else {
-			rl->rb_user_max = max;
-			rl->rb_gc_max = 0;
-			rl->rb_state = PBLK_RL_OFF;
-		}
-	} else if (free_blocks < rl->high) {
-		int shift = rl->high_pw - rl->rb_windows_pw;
-		int user_windows = free_blocks >> shift;
-		int user_max = user_windows << ilog2(NVM_MAX_VLBA);
-
-		rl->rb_user_max = user_max;
-		rl->rb_gc_max = max - user_max;
-
-		if (free_blocks <= rl->rsv_blocks) {
-			rl->rb_user_max = 0;
-			rl->rb_gc_max = max;
-		}
-
-		/* In the worst case, we will need to GC lines in the low list
-		 * (high valid sector count). If there are lines to GC on high
-		 * or mid lists, these will be prioritized
-		 */
-		rl->rb_state = PBLK_RL_LOW;
-	}
-
-	if (rl->rb_state != PBLK_RL_OFF)
-		pblk_gc_should_start(pblk);
-	else
-		pblk_gc_should_stop(pblk);
-}
-
-void pblk_rl_update_rates(struct pblk_rl *rl)
-{
-	__pblk_rl_update_rates(rl, pblk_rl_nr_user_free_blks(rl));
-}
-
-void pblk_rl_free_lines_inc(struct pblk_rl *rl, struct pblk_line *line)
-{
-	int blk_in_line = atomic_read(&line->blk_in_line);
-	int free_blocks;
-
-	atomic_add(blk_in_line, &rl->free_blocks);
-	free_blocks = atomic_add_return(blk_in_line, &rl->free_user_blocks);
-
-	__pblk_rl_update_rates(rl, free_blocks);
-}
-
-void pblk_rl_free_lines_dec(struct pblk_rl *rl, struct pblk_line *line,
-			    bool used)
-{
-	int blk_in_line = atomic_read(&line->blk_in_line);
-	int free_blocks;
-
-	atomic_sub(blk_in_line, &rl->free_blocks);
-
-	if (used)
-		free_blocks = atomic_sub_return(blk_in_line,
-							&rl->free_user_blocks);
-	else
-		free_blocks = atomic_read(&rl->free_user_blocks);
-
-	__pblk_rl_update_rates(rl, free_blocks);
-}
-
-int pblk_rl_high_thrs(struct pblk_rl *rl)
-{
-	return rl->high;
-}
-
-int pblk_rl_max_io(struct pblk_rl *rl)
-{
-	return rl->rb_max_io;
-}
-
-static void pblk_rl_u_timer(struct timer_list *t)
-{
-	struct pblk_rl *rl = from_timer(rl, t, u_timer);
-
-	/* Release user I/O state. Protect from GC */
-	smp_store_release(&rl->rb_user_active, 0);
-}
-
-void pblk_rl_free(struct pblk_rl *rl)
-{
-	del_timer(&rl->u_timer);
-}
-
-void pblk_rl_init(struct pblk_rl *rl, int budget, int threshold)
-{
-	struct pblk *pblk = container_of(rl, struct pblk, rl);
-	struct nvm_tgt_dev *dev = pblk->dev;
-	struct nvm_geo *geo = &dev->geo;
-	struct pblk_line_mgmt *l_mg = &pblk->l_mg;
-	struct pblk_line_meta *lm = &pblk->lm;
-	int sec_meta, blk_meta;
-	unsigned int rb_windows;
-
-	/* Consider sectors used for metadata */
-	sec_meta = (lm->smeta_sec + lm->emeta_sec[0]) * l_mg->nr_free_lines;
-	blk_meta = DIV_ROUND_UP(sec_meta, geo->clba);
-
-	rl->high = pblk->op_blks - blk_meta - lm->blk_per_line;
-	rl->high_pw = get_count_order(rl->high);
-
-	rl->rsv_blocks = pblk_get_min_chks(pblk);
-
-	/* This will always be a power-of-2 */
-	rb_windows = budget / NVM_MAX_VLBA;
-	rl->rb_windows_pw = get_count_order(rb_windows);
-
-	/* To start with, all buffer is available to user I/O writers */
-	rl->rb_budget = budget;
-	rl->rb_user_max = budget;
-	rl->rb_gc_max = 0;
-	rl->rb_state = PBLK_RL_HIGH;
-
-	/* Maximize I/O size and ansure that back threshold is respected */
-	if (threshold)
-		rl->rb_max_io = budget - pblk->min_write_pgs_data - threshold;
-	else
-		rl->rb_max_io = budget - pblk->min_write_pgs_data - 1;
-
-	atomic_set(&rl->rb_user_cnt, 0);
-	atomic_set(&rl->rb_gc_cnt, 0);
-	atomic_set(&rl->rb_space, -1);
-	atomic_set(&rl->werr_lines, 0);
-
-	timer_setup(&rl->u_timer, pblk_rl_u_timer, 0);
-
-	rl->rb_user_active = 0;
-	rl->rb_gc_active = 0;
-}
diff --git a/drivers/lightnvm/pblk-sysfs.c b/drivers/lightnvm/pblk-sysfs.c
deleted file mode 100644
index 6387302b03f2..000000000000
--- a/drivers/lightnvm/pblk-sysfs.c
+++ /dev/null
@@ -1,728 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright (C) 2016 CNEX Labs
- * Initial release: Javier Gonzalez <javier@cnexlabs.com>
- *                  Matias Bjorling <matias@cnexlabs.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License version
- * 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * Implementation of a physical block-device target for Open-channel SSDs.
- *
- * pblk-sysfs.c - pblk's sysfs
- *
- */
-
-#include "pblk.h"
-
-static ssize_t pblk_sysfs_luns_show(struct pblk *pblk, char *page)
-{
-	struct nvm_tgt_dev *dev = pblk->dev;
-	struct nvm_geo *geo = &dev->geo;
-	struct pblk_lun *rlun;
-	ssize_t sz = 0;
-	int i;
-
-	for (i = 0; i < geo->all_luns; i++) {
-		int active = 1;
-
-		rlun = &pblk->luns[i];
-		if (!down_trylock(&rlun->wr_sem)) {
-			active = 0;
-			up(&rlun->wr_sem);
-		}
-		sz += scnprintf(page + sz, PAGE_SIZE - sz,
-				"pblk: pos:%d, ch:%d, lun:%d - %d\n",
-					i,
-					rlun->bppa.a.ch,
-					rlun->bppa.a.lun,
-					active);
-	}
-
-	return sz;
-}
-
-static ssize_t pblk_sysfs_rate_limiter(struct pblk *pblk, char *page)
-{
-	int free_blocks, free_user_blocks, total_blocks;
-	int rb_user_max, rb_user_cnt;
-	int rb_gc_max, rb_gc_cnt, rb_budget, rb_state;
-
-	free_blocks = pblk_rl_nr_free_blks(&pblk->rl);
-	free_user_blocks = pblk_rl_nr_user_free_blks(&pblk->rl);
-	rb_user_max = pblk->rl.rb_user_max;
-	rb_user_cnt = atomic_read(&pblk->rl.rb_user_cnt);
-	rb_gc_max = pblk->rl.rb_gc_max;
-	rb_gc_cnt = atomic_read(&pblk->rl.rb_gc_cnt);
-	rb_budget = pblk->rl.rb_budget;
-	rb_state = pblk->rl.rb_state;
-
-	total_blocks = pblk->rl.total_blocks;
-
-	return snprintf(page, PAGE_SIZE,
-		"u:%u/%u,gc:%u/%u(%u)(stop:<%u,full:>%u,free:%d/%d/%d)-%d\n",
-				rb_user_cnt,
-				rb_user_max,
-				rb_gc_cnt,
-				rb_gc_max,
-				rb_state,
-				rb_budget,
-				pblk->rl.high,
-				free_blocks,
-				free_user_blocks,
-				total_blocks,
-				READ_ONCE(pblk->rl.rb_user_active));
-}
-
-static ssize_t pblk_sysfs_gc_state_show(struct pblk *pblk, char *page)
-{
-	int gc_enabled, gc_active;
-
-	pblk_gc_sysfs_state_show(pblk, &gc_enabled, &gc_active);
-	return snprintf(page, PAGE_SIZE, "gc_enabled=%d, gc_active=%d\n",
-					gc_enabled, gc_active);
-}
-
-static ssize_t pblk_sysfs_stats(struct pblk *pblk, char *page)
-{
-	ssize_t sz;
-
-	sz = snprintf(page, PAGE_SIZE,
-			"read_failed=%lu, read_high_ecc=%lu, read_empty=%lu, read_failed_gc=%lu, write_failed=%lu, erase_failed=%lu\n",
-			atomic_long_read(&pblk->read_failed),
-			atomic_long_read(&pblk->read_high_ecc),
-			atomic_long_read(&pblk->read_empty),
-			atomic_long_read(&pblk->read_failed_gc),
-			atomic_long_read(&pblk->write_failed),
-			atomic_long_read(&pblk->erase_failed));
-
-	return sz;
-}
-
-static ssize_t pblk_sysfs_write_buffer(struct pblk *pblk, char *page)
-{
-	return pblk_rb_sysfs(&pblk->rwb, page);
-}
-
-static ssize_t pblk_sysfs_ppaf(struct pblk *pblk, char *page)
-{
-	struct nvm_tgt_dev *dev = pblk->dev;
-	struct nvm_geo *geo = &dev->geo;
-	ssize_t sz = 0;
-
-	if (geo->version == NVM_OCSSD_SPEC_12) {
-		struct nvm_addrf_12 *ppaf = (struct nvm_addrf_12 *)&pblk->addrf;
-		struct nvm_addrf_12 *gppaf = (struct nvm_addrf_12 *)&geo->addrf;
-
-		sz = scnprintf(page, PAGE_SIZE,
-			"g:(b:%d)blk:%d/%d,pg:%d/%d,lun:%d/%d,ch:%d/%d,pl:%d/%d,sec:%d/%d\n",
-			pblk->addrf_len,
-			ppaf->blk_offset, ppaf->blk_len,
-			ppaf->pg_offset, ppaf->pg_len,
-			ppaf->lun_offset, ppaf->lun_len,
-			ppaf->ch_offset, ppaf->ch_len,
-			ppaf->pln_offset, ppaf->pln_len,
-			ppaf->sec_offset, ppaf->sec_len);
-
-		sz += scnprintf(page + sz, PAGE_SIZE - sz,
-			"d:blk:%d/%d,pg:%d/%d,lun:%d/%d,ch:%d/%d,pl:%d/%d,sec:%d/%d\n",
-			gppaf->blk_offset, gppaf->blk_len,
-			gppaf->pg_offset, gppaf->pg_len,
-			gppaf->lun_offset, gppaf->lun_len,
-			gppaf->ch_offset, gppaf->ch_len,
-			gppaf->pln_offset, gppaf->pln_len,
-			gppaf->sec_offset, gppaf->sec_len);
-	} else {
-		struct nvm_addrf *ppaf = &pblk->addrf;
-		struct nvm_addrf *gppaf = &geo->addrf;
-
-		sz = scnprintf(page, PAGE_SIZE,
-			"pblk:(s:%d)ch:%d/%d,lun:%d/%d,chk:%d/%d/sec:%d/%d\n",
-			pblk->addrf_len,
-			ppaf->ch_offset, ppaf->ch_len,
-			ppaf->lun_offset, ppaf->lun_len,
-			ppaf->chk_offset, ppaf->chk_len,
-			ppaf->sec_offset, ppaf->sec_len);
-
-		sz += scnprintf(page + sz, PAGE_SIZE - sz,
-			"device:ch:%d/%d,lun:%d/%d,chk:%d/%d,sec:%d/%d\n",
-			gppaf->ch_offset, gppaf->ch_len,
-			gppaf->lun_offset, gppaf->lun_len,
-			gppaf->chk_offset, gppaf->chk_len,
-			gppaf->sec_offset, gppaf->sec_len);
-	}
-
-	return sz;
-}
-
-static ssize_t pblk_sysfs_lines(struct pblk *pblk, char *page)
-{
-	struct nvm_tgt_dev *dev = pblk->dev;
-	struct nvm_geo *geo = &dev->geo;
-	struct pblk_line_meta *lm = &pblk->lm;
-	struct pblk_line_mgmt *l_mg = &pblk->l_mg;
-	struct pblk_line *line;
-	ssize_t sz = 0;
-	int nr_free_lines;
-	int cur_data, cur_log;
-	int free_line_cnt = 0, closed_line_cnt = 0, emeta_line_cnt = 0;
-	int d_line_cnt = 0, l_line_cnt = 0;
-	int gc_full = 0, gc_high = 0, gc_mid = 0, gc_low = 0, gc_empty = 0;
-	int gc_werr = 0;
-
-	int bad = 0, cor = 0;
-	int msecs = 0, cur_sec = 0, vsc = 0, sec_in_line = 0;
-	int map_weight = 0, meta_weight = 0;
-
-	spin_lock(&l_mg->free_lock);
-	cur_data = (l_mg->data_line) ? l_mg->data_line->id : -1;
-	cur_log = (l_mg->log_line) ? l_mg->log_line->id : -1;
-	nr_free_lines = l_mg->nr_free_lines;
-
-	list_for_each_entry(line, &l_mg->free_list, list)
-		free_line_cnt++;
-	spin_unlock(&l_mg->free_lock);
-
-	spin_lock(&l_mg->close_lock);
-	list_for_each_entry(line, &l_mg->emeta_list, list)
-		emeta_line_cnt++;
-	spin_unlock(&l_mg->close_lock);
-
-	spin_lock(&l_mg->gc_lock);
-	list_for_each_entry(line, &l_mg->gc_full_list, list) {
-		if (line->type == PBLK_LINETYPE_DATA)
-			d_line_cnt++;
-		else if (line->type == PBLK_LINETYPE_LOG)
-			l_line_cnt++;
-		closed_line_cnt++;
-		gc_full++;
-	}
-
-	list_for_each_entry(line, &l_mg->gc_high_list, list) {
-		if (line->type == PBLK_LINETYPE_DATA)
-			d_line_cnt++;
-		else if (line->type == PBLK_LINETYPE_LOG)
-			l_line_cnt++;
-		closed_line_cnt++;
-		gc_high++;
-	}
-
-	list_for_each_entry(line, &l_mg->gc_mid_list, list) {
-		if (line->type == PBLK_LINETYPE_DATA)
-			d_line_cnt++;
-		else if (line->type == PBLK_LINETYPE_LOG)
-			l_line_cnt++;
-		closed_line_cnt++;
-		gc_mid++;
-	}
-
-	list_for_each_entry(line, &l_mg->gc_low_list, list) {
-		if (line->type == PBLK_LINETYPE_DATA)
-			d_line_cnt++;
-		else if (line->type == PBLK_LINETYPE_LOG)
-			l_line_cnt++;
-		closed_line_cnt++;
-		gc_low++;
-	}
-
-	list_for_each_entry(line, &l_mg->gc_empty_list, list) {
-		if (line->type == PBLK_LINETYPE_DATA)
-			d_line_cnt++;
-		else if (line->type == PBLK_LINETYPE_LOG)
-			l_line_cnt++;
-		closed_line_cnt++;
-		gc_empty++;
-	}
-
-	list_for_each_entry(line, &l_mg->gc_werr_list, list) {
-		if (line->type == PBLK_LINETYPE_DATA)
-			d_line_cnt++;
-		else if (line->type == PBLK_LINETYPE_LOG)
-			l_line_cnt++;
-		closed_line_cnt++;
-		gc_werr++;
-	}
-
-	list_for_each_entry(line, &l_mg->bad_list, list)
-		bad++;
-	list_for_each_entry(line, &l_mg->corrupt_list, list)
-		cor++;
-	spin_unlock(&l_mg->gc_lock);
-
-	spin_lock(&l_mg->free_lock);
-	if (l_mg->data_line) {
-		cur_sec = l_mg->data_line->cur_sec;
-		msecs = l_mg->data_line->left_msecs;
-		vsc = le32_to_cpu(*l_mg->data_line->vsc);
-		sec_in_line = l_mg->data_line->sec_in_line;
-		meta_weight = bitmap_weight(&l_mg->meta_bitmap,
-							PBLK_DATA_LINES);
-
-		spin_lock(&l_mg->data_line->lock);
-		if (l_mg->data_line->map_bitmap)
-			map_weight = bitmap_weight(l_mg->data_line->map_bitmap,
-							lm->sec_per_line);
-		else
-			map_weight = 0;
-		spin_unlock(&l_mg->data_line->lock);
-	}
-	spin_unlock(&l_mg->free_lock);
-
-	if (nr_free_lines != free_line_cnt)
-		pblk_err(pblk, "corrupted free line list:%d/%d\n",
-						nr_free_lines, free_line_cnt);
-
-	sz = scnprintf(page, PAGE_SIZE - sz,
-		"line: nluns:%d, nblks:%d, nsecs:%d\n",
-		geo->all_luns, lm->blk_per_line, lm->sec_per_line);
-
-	sz += scnprintf(page + sz, PAGE_SIZE - sz,
-		"lines:d:%d,l:%d-f:%d,m:%d/%d,c:%d,b:%d,co:%d(d:%d,l:%d)t:%d\n",
-					cur_data, cur_log,
-					nr_free_lines,
-					emeta_line_cnt, meta_weight,
-					closed_line_cnt,
-					bad, cor,
-					d_line_cnt, l_line_cnt,
-					l_mg->nr_lines);
-
-	sz += scnprintf(page + sz, PAGE_SIZE - sz,
-		"GC: full:%d, high:%d, mid:%d, low:%d, empty:%d, werr: %d, queue:%d\n",
-			gc_full, gc_high, gc_mid, gc_low, gc_empty, gc_werr,
-			atomic_read(&pblk->gc.read_inflight_gc));
-
-	sz += scnprintf(page + sz, PAGE_SIZE - sz,
-		"data (%d) cur:%d, left:%d, vsc:%d, s:%d, map:%d/%d (%d)\n",
-			cur_data, cur_sec, msecs, vsc, sec_in_line,
-			map_weight, lm->sec_per_line,
-			atomic_read(&pblk->inflight_io));
-
-	return sz;
-}
-
-static ssize_t pblk_sysfs_lines_info(struct pblk *pblk, char *page)
-{
-	struct nvm_tgt_dev *dev = pblk->dev;
-	struct nvm_geo *geo = &dev->geo;
-	struct pblk_line_meta *lm = &pblk->lm;
-	ssize_t sz = 0;
-
-	sz = scnprintf(page, PAGE_SIZE - sz,
-				"smeta - len:%d, secs:%d\n",
-					lm->smeta_len, lm->smeta_sec);
-	sz += scnprintf(page + sz, PAGE_SIZE - sz,
-				"emeta - len:%d, sec:%d, bb_start:%d\n",
-					lm->emeta_len[0], lm->emeta_sec[0],
-					lm->emeta_bb);
-	sz += scnprintf(page + sz, PAGE_SIZE - sz,
-				"bitmap lengths: sec:%d, blk:%d, lun:%d\n",
-					lm->sec_bitmap_len,
-					lm->blk_bitmap_len,
-					lm->lun_bitmap_len);
-	sz += scnprintf(page + sz, PAGE_SIZE - sz,
-				"blk_line:%d, sec_line:%d, sec_blk:%d\n",
-					lm->blk_per_line,
-					lm->sec_per_line,
-					geo->clba);
-
-	return sz;
-}
-
-static ssize_t pblk_sysfs_get_sec_per_write(struct pblk *pblk, char *page)
-{
-	return snprintf(page, PAGE_SIZE, "%d\n", pblk->sec_per_write);
-}
-
-static ssize_t pblk_get_write_amp(u64 user, u64 gc, u64 pad,
-				  char *page)
-{
-	int sz;
-
-	sz = scnprintf(page, PAGE_SIZE,
-			"user:%lld gc:%lld pad:%lld WA:",
-			user, gc, pad);
-
-	if (!user) {
-		sz += scnprintf(page + sz, PAGE_SIZE - sz, "NaN\n");
-	} else {
-		u64 wa_int;
-		u32 wa_frac;
-
-		wa_int = (user + gc + pad) * 100000;
-		wa_int = div64_u64(wa_int, user);
-		wa_int = div_u64_rem(wa_int, 100000, &wa_frac);
-
-		sz += scnprintf(page + sz, PAGE_SIZE - sz, "%llu.%05u\n",
-							wa_int, wa_frac);
-	}
-
-	return sz;
-}
-
-static ssize_t pblk_sysfs_get_write_amp_mileage(struct pblk *pblk, char *page)
-{
-	return pblk_get_write_amp(atomic64_read(&pblk->user_wa),
-		atomic64_read(&pblk->gc_wa), atomic64_read(&pblk->pad_wa),
-		page);
-}
-
-static ssize_t pblk_sysfs_get_write_amp_trip(struct pblk *pblk, char *page)
-{
-	return pblk_get_write_amp(
-		atomic64_read(&pblk->user_wa) - pblk->user_rst_wa,
-		atomic64_read(&pblk->gc_wa) - pblk->gc_rst_wa,
-		atomic64_read(&pblk->pad_wa) - pblk->pad_rst_wa, page);
-}
-
-static long long bucket_percentage(unsigned long long bucket,
-				   unsigned long long total)
-{
-	int p = bucket * 100;
-
-	p = div_u64(p, total);
-
-	return p;
-}
-
-static ssize_t pblk_sysfs_get_padding_dist(struct pblk *pblk, char *page)
-{
-	int sz = 0;
-	unsigned long long total;
-	unsigned long long total_buckets = 0;
-	int buckets = pblk->min_write_pgs - 1;
-	int i;
-
-	total = atomic64_read(&pblk->nr_flush) - pblk->nr_flush_rst;
-	if (!total) {
-		for (i = 0; i < (buckets + 1); i++)
-			sz += scnprintf(page + sz, PAGE_SIZE - sz,
-				"%d:0 ", i);
-		sz += scnprintf(page + sz, PAGE_SIZE - sz, "\n");
-
-		return sz;
-	}
-
-	for (i = 0; i < buckets; i++)
-		total_buckets += atomic64_read(&pblk->pad_dist[i]);
-
-	sz += scnprintf(page + sz, PAGE_SIZE - sz, "0:%lld%% ",
-		bucket_percentage(total - total_buckets, total));
-
-	for (i = 0; i < buckets; i++) {
-		unsigned long long p;
-
-		p = bucket_percentage(atomic64_read(&pblk->pad_dist[i]),
-					  total);
-		sz += scnprintf(page + sz, PAGE_SIZE - sz, "%d:%lld%% ",
-				i + 1, p);
-	}
-	sz += scnprintf(page + sz, PAGE_SIZE - sz, "\n");
-
-	return sz;
-}
-
-#ifdef CONFIG_NVM_PBLK_DEBUG
-static ssize_t pblk_sysfs_stats_debug(struct pblk *pblk, char *page)
-{
-	return snprintf(page, PAGE_SIZE,
-		"%lu\t%lu\t%ld\t%llu\t%ld\t%lu\t%lu\t%lu\t%lu\t%lu\t%lu\t%lu\t%lu\n",
-			atomic_long_read(&pblk->inflight_writes),
-			atomic_long_read(&pblk->inflight_reads),
-			atomic_long_read(&pblk->req_writes),
-			(u64)atomic64_read(&pblk->nr_flush),
-			atomic_long_read(&pblk->padded_writes),
-			atomic_long_read(&pblk->padded_wb),
-			atomic_long_read(&pblk->sub_writes),
-			atomic_long_read(&pblk->sync_writes),
-			atomic_long_read(&pblk->recov_writes),
-			atomic_long_read(&pblk->recov_gc_writes),
-			atomic_long_read(&pblk->recov_gc_reads),
-			atomic_long_read(&pblk->cache_reads),
-			atomic_long_read(&pblk->sync_reads));
-}
-#endif
-
-static ssize_t pblk_sysfs_gc_force(struct pblk *pblk, const char *page,
-				   size_t len)
-{
-	size_t c_len;
-	int force;
-
-	c_len = strcspn(page, "\n");
-	if (c_len >= len)
-		return -EINVAL;
-
-	if (kstrtouint(page, 0, &force))
-		return -EINVAL;
-
-	pblk_gc_sysfs_force(pblk, force);
-
-	return len;
-}
-
-static ssize_t pblk_sysfs_set_sec_per_write(struct pblk *pblk,
-					     const char *page, size_t len)
-{
-	size_t c_len;
-	int sec_per_write;
-
-	c_len = strcspn(page, "\n");
-	if (c_len >= len)
-		return -EINVAL;
-
-	if (kstrtouint(page, 0, &sec_per_write))
-		return -EINVAL;
-
-	if (!pblk_is_oob_meta_supported(pblk)) {
-		/* For packed metadata case it is
-		 * not allowed to change sec_per_write.
-		 */
-		return -EINVAL;
-	}
-
-	if (sec_per_write < pblk->min_write_pgs
-				|| sec_per_write > pblk->max_write_pgs
-				|| sec_per_write % pblk->min_write_pgs != 0)
-		return -EINVAL;
-
-	pblk_set_sec_per_write(pblk, sec_per_write);
-
-	return len;
-}
-
-static ssize_t pblk_sysfs_set_write_amp_trip(struct pblk *pblk,
-			const char *page, size_t len)
-{
-	size_t c_len;
-	int reset_value;
-
-	c_len = strcspn(page, "\n");
-	if (c_len >= len)
-		return -EINVAL;
-
-	if (kstrtouint(page, 0, &reset_value))
-		return -EINVAL;
-
-	if (reset_value !=  0)
-		return -EINVAL;
-
-	pblk->user_rst_wa = atomic64_read(&pblk->user_wa);
-	pblk->pad_rst_wa = atomic64_read(&pblk->pad_wa);
-	pblk->gc_rst_wa = atomic64_read(&pblk->gc_wa);
-
-	return len;
-}
-
-
-static ssize_t pblk_sysfs_set_padding_dist(struct pblk *pblk,
-			const char *page, size_t len)
-{
-	size_t c_len;
-	int reset_value;
-	int buckets = pblk->min_write_pgs - 1;
-	int i;
-
-	c_len = strcspn(page, "\n");
-	if (c_len >= len)
-		return -EINVAL;
-
-	if (kstrtouint(page, 0, &reset_value))
-		return -EINVAL;
-
-	if (reset_value !=  0)
-		return -EINVAL;
-
-	for (i = 0; i < buckets; i++)
-		atomic64_set(&pblk->pad_dist[i], 0);
-
-	pblk->nr_flush_rst = atomic64_read(&pblk->nr_flush);
-
-	return len;
-}
-
-static struct attribute sys_write_luns = {
-	.name = "write_luns",
-	.mode = 0444,
-};
-
-static struct attribute sys_rate_limiter_attr = {
-	.name = "rate_limiter",
-	.mode = 0444,
-};
-
-static struct attribute sys_gc_state = {
-	.name = "gc_state",
-	.mode = 0444,
-};
-
-static struct attribute sys_errors_attr = {
-	.name = "errors",
-	.mode = 0444,
-};
-
-static struct attribute sys_rb_attr = {
-	.name = "write_buffer",
-	.mode = 0444,
-};
-
-static struct attribute sys_stats_ppaf_attr = {
-	.name = "ppa_format",
-	.mode = 0444,
-};
-
-static struct attribute sys_lines_attr = {
-	.name = "lines",
-	.mode = 0444,
-};
-
-static struct attribute sys_lines_info_attr = {
-	.name = "lines_info",
-	.mode = 0444,
-};
-
-static struct attribute sys_gc_force = {
-	.name = "gc_force",
-	.mode = 0200,
-};
-
-static struct attribute sys_max_sec_per_write = {
-	.name = "max_sec_per_write",
-	.mode = 0644,
-};
-
-static struct attribute sys_write_amp_mileage = {
-	.name = "write_amp_mileage",
-	.mode = 0444,
-};
-
-static struct attribute sys_write_amp_trip = {
-	.name = "write_amp_trip",
-	.mode = 0644,
-};
-
-static struct attribute sys_padding_dist = {
-	.name = "padding_dist",
-	.mode = 0644,
-};
-
-#ifdef CONFIG_NVM_PBLK_DEBUG
-static struct attribute sys_stats_debug_attr = {
-	.name = "stats",
-	.mode = 0444,
-};
-#endif
-
-static struct attribute *pblk_attrs[] = {
-	&sys_write_luns,
-	&sys_rate_limiter_attr,
-	&sys_errors_attr,
-	&sys_gc_state,
-	&sys_gc_force,
-	&sys_max_sec_per_write,
-	&sys_rb_attr,
-	&sys_stats_ppaf_attr,
-	&sys_lines_attr,
-	&sys_lines_info_attr,
-	&sys_write_amp_mileage,
-	&sys_write_amp_trip,
-	&sys_padding_dist,
-#ifdef CONFIG_NVM_PBLK_DEBUG
-	&sys_stats_debug_attr,
-#endif
-	NULL,
-};
-
-static ssize_t pblk_sysfs_show(struct kobject *kobj, struct attribute *attr,
-			       char *buf)
-{
-	struct pblk *pblk = container_of(kobj, struct pblk, kobj);
-
-	if (strcmp(attr->name, "rate_limiter") == 0)
-		return pblk_sysfs_rate_limiter(pblk, buf);
-	else if (strcmp(attr->name, "write_luns") == 0)
-		return pblk_sysfs_luns_show(pblk, buf);
-	else if (strcmp(attr->name, "gc_state") == 0)
-		return pblk_sysfs_gc_state_show(pblk, buf);
-	else if (strcmp(attr->name, "errors") == 0)
-		return pblk_sysfs_stats(pblk, buf);
-	else if (strcmp(attr->name, "write_buffer") == 0)
-		return pblk_sysfs_write_buffer(pblk, buf);
-	else if (strcmp(attr->name, "ppa_format") == 0)
-		return pblk_sysfs_ppaf(pblk, buf);
-	else if (strcmp(attr->name, "lines") == 0)
-		return pblk_sysfs_lines(pblk, buf);
-	else if (strcmp(attr->name, "lines_info") == 0)
-		return pblk_sysfs_lines_info(pblk, buf);
-	else if (strcmp(attr->name, "max_sec_per_write") == 0)
-		return pblk_sysfs_get_sec_per_write(pblk, buf);
-	else if (strcmp(attr->name, "write_amp_mileage") == 0)
-		return pblk_sysfs_get_write_amp_mileage(pblk, buf);
-	else if (strcmp(attr->name, "write_amp_trip") == 0)
-		return pblk_sysfs_get_write_amp_trip(pblk, buf);
-	else if (strcmp(attr->name, "padding_dist") == 0)
-		return pblk_sysfs_get_padding_dist(pblk, buf);
-#ifdef CONFIG_NVM_PBLK_DEBUG
-	else if (strcmp(attr->name, "stats") == 0)
-		return pblk_sysfs_stats_debug(pblk, buf);
-#endif
-	return 0;
-}
-
-static ssize_t pblk_sysfs_store(struct kobject *kobj, struct attribute *attr,
-				const char *buf, size_t len)
-{
-	struct pblk *pblk = container_of(kobj, struct pblk, kobj);
-
-	if (strcmp(attr->name, "gc_force") == 0)
-		return pblk_sysfs_gc_force(pblk, buf, len);
-	else if (strcmp(attr->name, "max_sec_per_write") == 0)
-		return pblk_sysfs_set_sec_per_write(pblk, buf, len);
-	else if (strcmp(attr->name, "write_amp_trip") == 0)
-		return pblk_sysfs_set_write_amp_trip(pblk, buf, len);
-	else if (strcmp(attr->name, "padding_dist") == 0)
-		return pblk_sysfs_set_padding_dist(pblk, buf, len);
-	return 0;
-}
-
-static const struct sysfs_ops pblk_sysfs_ops = {
-	.show = pblk_sysfs_show,
-	.store = pblk_sysfs_store,
-};
-
-static struct kobj_type pblk_ktype = {
-	.sysfs_ops	= &pblk_sysfs_ops,
-	.default_attrs	= pblk_attrs,
-};
-
-int pblk_sysfs_init(struct gendisk *tdisk)
-{
-	struct pblk *pblk = tdisk->private_data;
-	struct device *parent_dev = disk_to_dev(pblk->disk);
-	int ret;
-
-	ret = kobject_init_and_add(&pblk->kobj, &pblk_ktype,
-					kobject_get(&parent_dev->kobj),
-					"%s", "pblk");
-	if (ret) {
-		pblk_err(pblk, "could not register\n");
-		return ret;
-	}
-
-	kobject_uevent(&pblk->kobj, KOBJ_ADD);
-	return 0;
-}
-
-void pblk_sysfs_exit(struct gendisk *tdisk)
-{
-	struct pblk *pblk = tdisk->private_data;
-
-	kobject_uevent(&pblk->kobj, KOBJ_REMOVE);
-	kobject_del(&pblk->kobj);
-	kobject_put(&pblk->kobj);
-}
diff --git a/drivers/lightnvm/pblk-trace.h b/drivers/lightnvm/pblk-trace.h
deleted file mode 100644
index 47b67c6bff7a..000000000000
--- a/drivers/lightnvm/pblk-trace.h
+++ /dev/null
@@ -1,145 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#undef TRACE_SYSTEM
-#define TRACE_SYSTEM pblk
-
-#if !defined(_TRACE_PBLK_H) || defined(TRACE_HEADER_MULTI_READ)
-#define _TRACE_PBLK_H
-
-#include <linux/tracepoint.h>
-
-struct ppa_addr;
-
-#define show_chunk_flags(state) __print_flags(state, "",	\
-	{ NVM_CHK_ST_FREE,		"FREE",		},	\
-	{ NVM_CHK_ST_CLOSED,		"CLOSED",	},	\
-	{ NVM_CHK_ST_OPEN,		"OPEN",		},	\
-	{ NVM_CHK_ST_OFFLINE,		"OFFLINE",	})
-
-#define show_line_state(state) __print_symbolic(state,		\
-	{ PBLK_LINESTATE_NEW,		"NEW",		},	\
-	{ PBLK_LINESTATE_FREE,		"FREE",		},	\
-	{ PBLK_LINESTATE_OPEN,		"OPEN",		},	\
-	{ PBLK_LINESTATE_CLOSED,	"CLOSED",	},	\
-	{ PBLK_LINESTATE_GC,		"GC",		},	\
-	{ PBLK_LINESTATE_BAD,		"BAD",		},	\
-	{ PBLK_LINESTATE_CORRUPT,	"CORRUPT"	})
-
-
-#define show_pblk_state(state) __print_symbolic(state,		\
-	{ PBLK_STATE_RUNNING,		"RUNNING",	},	\
-	{ PBLK_STATE_STOPPING,		"STOPPING",	},	\
-	{ PBLK_STATE_RECOVERING,	"RECOVERING",	},	\
-	{ PBLK_STATE_STOPPED,		"STOPPED"	})
-
-#define show_chunk_erase_state(state) __print_symbolic(state,	\
-	{ PBLK_CHUNK_RESET_START,	"START",	},	\
-	{ PBLK_CHUNK_RESET_DONE,	"OK",		},	\
-	{ PBLK_CHUNK_RESET_FAILED,	"FAILED"	})
-
-
-TRACE_EVENT(pblk_chunk_reset,
-
-	TP_PROTO(const char *name, struct ppa_addr *ppa, int state),
-
-	TP_ARGS(name, ppa, state),
-
-	TP_STRUCT__entry(
-		__string(name, name)
-		__field(u64, ppa)
-		__field(int, state)
-	),
-
-	TP_fast_assign(
-		__assign_str(name, name);
-		__entry->ppa = ppa->ppa;
-		__entry->state = state;
-	),
-
-	TP_printk("dev=%s grp=%llu pu=%llu chk=%llu state=%s", __get_str(name),
-			(u64)(((struct ppa_addr *)(&__entry->ppa))->m.grp),
-			(u64)(((struct ppa_addr *)(&__entry->ppa))->m.pu),
-			(u64)(((struct ppa_addr *)(&__entry->ppa))->m.chk),
-			show_chunk_erase_state((int)__entry->state))
-
-);
-
-TRACE_EVENT(pblk_chunk_state,
-
-	TP_PROTO(const char *name, struct ppa_addr *ppa, int state),
-
-	TP_ARGS(name, ppa, state),
-
-	TP_STRUCT__entry(
-		__string(name, name)
-		__field(u64, ppa)
-		__field(int, state)
-	),
-
-	TP_fast_assign(
-		__assign_str(name, name);
-		__entry->ppa = ppa->ppa;
-		__entry->state = state;
-	),
-
-	TP_printk("dev=%s grp=%llu pu=%llu chk=%llu state=%s", __get_str(name),
-			(u64)(((struct ppa_addr *)(&__entry->ppa))->m.grp),
-			(u64)(((struct ppa_addr *)(&__entry->ppa))->m.pu),
-			(u64)(((struct ppa_addr *)(&__entry->ppa))->m.chk),
-			show_chunk_flags((int)__entry->state))
-
-);
-
-TRACE_EVENT(pblk_line_state,
-
-	TP_PROTO(const char *name, int line, int state),
-
-	TP_ARGS(name, line, state),
-
-	TP_STRUCT__entry(
-		__string(name, name)
-		__field(int, line)
-		__field(int, state)
-	),
-
-	TP_fast_assign(
-		__assign_str(name, name);
-		__entry->line = line;
-		__entry->state = state;
-	),
-
-	TP_printk("dev=%s line=%d state=%s", __get_str(name),
-			(int)__entry->line,
-			show_line_state((int)__entry->state))
-
-);
-
-TRACE_EVENT(pblk_state,
-
-	TP_PROTO(const char *name, int state),
-
-	TP_ARGS(name, state),
-
-	TP_STRUCT__entry(
-		__string(name, name)
-		__field(int, state)
-	),
-
-	TP_fast_assign(
-		__assign_str(name, name);
-		__entry->state = state;
-	),
-
-	TP_printk("dev=%s state=%s", __get_str(name),
-			show_pblk_state((int)__entry->state))
-
-);
-
-#endif /* !defined(_TRACE_PBLK_H) || defined(TRACE_HEADER_MULTI_READ) */
-
-/* This part must be outside protection */
-
-#undef TRACE_INCLUDE_PATH
-#define TRACE_INCLUDE_PATH ../../drivers/lightnvm
-#undef TRACE_INCLUDE_FILE
-#define TRACE_INCLUDE_FILE pblk-trace
-#include <trace/define_trace.h>
diff --git a/drivers/lightnvm/pblk-write.c b/drivers/lightnvm/pblk-write.c
deleted file mode 100644
index b9a2aeba95ab..000000000000
--- a/drivers/lightnvm/pblk-write.c
+++ /dev/null
@@ -1,665 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright (C) 2016 CNEX Labs
- * Initial release: Javier Gonzalez <javier@cnexlabs.com>
- *                  Matias Bjorling <matias@cnexlabs.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License version
- * 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * pblk-write.c - pblk's write path from write buffer to media
- */
-
-#include "pblk.h"
-#include "pblk-trace.h"
-
-static unsigned long pblk_end_w_bio(struct pblk *pblk, struct nvm_rq *rqd,
-				    struct pblk_c_ctx *c_ctx)
-{
-	struct bio *original_bio;
-	struct pblk_rb *rwb = &pblk->rwb;
-	unsigned long ret;
-	int i;
-
-	for (i = 0; i < c_ctx->nr_valid; i++) {
-		struct pblk_w_ctx *w_ctx;
-		int pos = c_ctx->sentry + i;
-		int flags;
-
-		w_ctx = pblk_rb_w_ctx(rwb, pos);
-		flags = READ_ONCE(w_ctx->flags);
-
-		if (flags & PBLK_FLUSH_ENTRY) {
-			flags &= ~PBLK_FLUSH_ENTRY;
-			/* Release flags on context. Protect from writes */
-			smp_store_release(&w_ctx->flags, flags);
-
-#ifdef CONFIG_NVM_PBLK_DEBUG
-			atomic_dec(&rwb->inflight_flush_point);
-#endif
-		}
-
-		while ((original_bio = bio_list_pop(&w_ctx->bios)))
-			bio_endio(original_bio);
-	}
-
-	if (c_ctx->nr_padded)
-		pblk_bio_free_pages(pblk, rqd->bio, c_ctx->nr_valid,
-							c_ctx->nr_padded);
-
-#ifdef CONFIG_NVM_PBLK_DEBUG
-	atomic_long_add(rqd->nr_ppas, &pblk->sync_writes);
-#endif
-
-	ret = pblk_rb_sync_advance(&pblk->rwb, c_ctx->nr_valid);
-
-	bio_put(rqd->bio);
-	pblk_free_rqd(pblk, rqd, PBLK_WRITE);
-
-	return ret;
-}
-
-static unsigned long pblk_end_queued_w_bio(struct pblk *pblk,
-					   struct nvm_rq *rqd,
-					   struct pblk_c_ctx *c_ctx)
-{
-	list_del(&c_ctx->list);
-	return pblk_end_w_bio(pblk, rqd, c_ctx);
-}
-
-static void pblk_complete_write(struct pblk *pblk, struct nvm_rq *rqd,
-				struct pblk_c_ctx *c_ctx)
-{
-	struct pblk_c_ctx *c, *r;
-	unsigned long flags;
-	unsigned long pos;
-
-#ifdef CONFIG_NVM_PBLK_DEBUG
-	atomic_long_sub(c_ctx->nr_valid, &pblk->inflight_writes);
-#endif
-	pblk_up_rq(pblk, c_ctx->lun_bitmap);
-
-	pos = pblk_rb_sync_init(&pblk->rwb, &flags);
-	if (pos == c_ctx->sentry) {
-		pos = pblk_end_w_bio(pblk, rqd, c_ctx);
-
-retry:
-		list_for_each_entry_safe(c, r, &pblk->compl_list, list) {
-			rqd = nvm_rq_from_c_ctx(c);
-			if (c->sentry == pos) {
-				pos = pblk_end_queued_w_bio(pblk, rqd, c);
-				goto retry;
-			}
-		}
-	} else {
-		WARN_ON(nvm_rq_from_c_ctx(c_ctx) != rqd);
-		list_add_tail(&c_ctx->list, &pblk->compl_list);
-	}
-	pblk_rb_sync_end(&pblk->rwb, &flags);
-}
-
-/* Map remaining sectors in chunk, starting from ppa */
-static void pblk_map_remaining(struct pblk *pblk, struct ppa_addr *ppa,
-		int rqd_ppas)
-{
-	struct pblk_line *line;
-	struct ppa_addr map_ppa = *ppa;
-	__le64 addr_empty = cpu_to_le64(ADDR_EMPTY);
-	__le64 *lba_list;
-	u64 paddr;
-	int done = 0;
-	int n = 0;
-
-	line = pblk_ppa_to_line(pblk, *ppa);
-	lba_list = emeta_to_lbas(pblk, line->emeta->buf);
-
-	spin_lock(&line->lock);
-
-	while (!done)  {
-		paddr = pblk_dev_ppa_to_line_addr(pblk, map_ppa);
-
-		if (!test_and_set_bit(paddr, line->map_bitmap))
-			line->left_msecs--;
-
-		if (n < rqd_ppas && lba_list[paddr] != addr_empty)
-			line->nr_valid_lbas--;
-
-		lba_list[paddr] = addr_empty;
-
-		if (!test_and_set_bit(paddr, line->invalid_bitmap))
-			le32_add_cpu(line->vsc, -1);
-
-		done = nvm_next_ppa_in_chk(pblk->dev, &map_ppa);
-
-		n++;
-	}
-
-	line->w_err_gc->has_write_err = 1;
-	spin_unlock(&line->lock);
-}
-
-static void pblk_prepare_resubmit(struct pblk *pblk, unsigned int sentry,
-				  unsigned int nr_entries)
-{
-	struct pblk_rb *rb = &pblk->rwb;
-	struct pblk_rb_entry *entry;
-	struct pblk_line *line;
-	struct pblk_w_ctx *w_ctx;
-	struct ppa_addr ppa_l2p;
-	int flags;
-	unsigned int i;
-
-	spin_lock(&pblk->trans_lock);
-	for (i = 0; i < nr_entries; i++) {
-		entry = &rb->entries[pblk_rb_ptr_wrap(rb, sentry, i)];
-		w_ctx = &entry->w_ctx;
-
-		/* Check if the lba has been overwritten */
-		if (w_ctx->lba != ADDR_EMPTY) {
-			ppa_l2p = pblk_trans_map_get(pblk, w_ctx->lba);
-			if (!pblk_ppa_comp(ppa_l2p, entry->cacheline))
-				w_ctx->lba = ADDR_EMPTY;
-		}
-
-		/* Mark up the entry as submittable again */
-		flags = READ_ONCE(w_ctx->flags);
-		flags |= PBLK_WRITTEN_DATA;
-		/* Release flags on write context. Protect from writes */
-		smp_store_release(&w_ctx->flags, flags);
-
-		/* Decrease the reference count to the line as we will
-		 * re-map these entries
-		 */
-		line = pblk_ppa_to_line(pblk, w_ctx->ppa);
-		atomic_dec(&line->sec_to_update);
-		kref_put(&line->ref, pblk_line_put);
-	}
-	spin_unlock(&pblk->trans_lock);
-}
-
-static void pblk_queue_resubmit(struct pblk *pblk, struct pblk_c_ctx *c_ctx)
-{
-	struct pblk_c_ctx *r_ctx;
-
-	r_ctx = kzalloc(sizeof(struct pblk_c_ctx), GFP_KERNEL);
-	if (!r_ctx)
-		return;
-
-	r_ctx->lun_bitmap = NULL;
-	r_ctx->sentry = c_ctx->sentry;
-	r_ctx->nr_valid = c_ctx->nr_valid;
-	r_ctx->nr_padded = c_ctx->nr_padded;
-
-	spin_lock(&pblk->resubmit_lock);
-	list_add_tail(&r_ctx->list, &pblk->resubmit_list);
-	spin_unlock(&pblk->resubmit_lock);
-
-#ifdef CONFIG_NVM_PBLK_DEBUG
-	atomic_long_add(c_ctx->nr_valid, &pblk->recov_writes);
-#endif
-}
-
-static void pblk_submit_rec(struct work_struct *work)
-{
-	struct pblk_rec_ctx *recovery =
-			container_of(work, struct pblk_rec_ctx, ws_rec);
-	struct pblk *pblk = recovery->pblk;
-	struct nvm_rq *rqd = recovery->rqd;
-	struct pblk_c_ctx *c_ctx = nvm_rq_to_pdu(rqd);
-	struct ppa_addr *ppa_list = nvm_rq_to_ppa_list(rqd);
-
-	pblk_log_write_err(pblk, rqd);
-
-	pblk_map_remaining(pblk, ppa_list, rqd->nr_ppas);
-	pblk_queue_resubmit(pblk, c_ctx);
-
-	pblk_up_rq(pblk, c_ctx->lun_bitmap);
-	if (c_ctx->nr_padded)
-		pblk_bio_free_pages(pblk, rqd->bio, c_ctx->nr_valid,
-							c_ctx->nr_padded);
-	bio_put(rqd->bio);
-	pblk_free_rqd(pblk, rqd, PBLK_WRITE);
-	mempool_free(recovery, &pblk->rec_pool);
-
-	atomic_dec(&pblk->inflight_io);
-	pblk_write_kick(pblk);
-}
-
-
-static void pblk_end_w_fail(struct pblk *pblk, struct nvm_rq *rqd)
-{
-	struct pblk_rec_ctx *recovery;
-
-	recovery = mempool_alloc(&pblk->rec_pool, GFP_ATOMIC);
-	if (!recovery) {
-		pblk_err(pblk, "could not allocate recovery work\n");
-		return;
-	}
-
-	recovery->pblk = pblk;
-	recovery->rqd = rqd;
-
-	INIT_WORK(&recovery->ws_rec, pblk_submit_rec);
-	queue_work(pblk->close_wq, &recovery->ws_rec);
-}
-
-static void pblk_end_io_write(struct nvm_rq *rqd)
-{
-	struct pblk *pblk = rqd->private;
-	struct pblk_c_ctx *c_ctx = nvm_rq_to_pdu(rqd);
-
-	if (rqd->error) {
-		pblk_end_w_fail(pblk, rqd);
-		return;
-	} else {
-		if (trace_pblk_chunk_state_enabled())
-			pblk_check_chunk_state_update(pblk, rqd);
-#ifdef CONFIG_NVM_PBLK_DEBUG
-		WARN_ONCE(rqd->bio->bi_status, "pblk: corrupted write error\n");
-#endif
-	}
-
-	pblk_complete_write(pblk, rqd, c_ctx);
-	atomic_dec(&pblk->inflight_io);
-}
-
-static void pblk_end_io_write_meta(struct nvm_rq *rqd)
-{
-	struct pblk *pblk = rqd->private;
-	struct pblk_g_ctx *m_ctx = nvm_rq_to_pdu(rqd);
-	struct pblk_line *line = m_ctx->private;
-	struct pblk_emeta *emeta = line->emeta;
-	struct ppa_addr *ppa_list = nvm_rq_to_ppa_list(rqd);
-	int sync;
-
-	pblk_up_chunk(pblk, ppa_list[0]);
-
-	if (rqd->error) {
-		pblk_log_write_err(pblk, rqd);
-		pblk_err(pblk, "metadata I/O failed. Line %d\n", line->id);
-		line->w_err_gc->has_write_err = 1;
-	} else {
-		if (trace_pblk_chunk_state_enabled())
-			pblk_check_chunk_state_update(pblk, rqd);
-	}
-
-	sync = atomic_add_return(rqd->nr_ppas, &emeta->sync);
-	if (sync == emeta->nr_entries)
-		pblk_gen_run_ws(pblk, line, NULL, pblk_line_close_ws,
-						GFP_ATOMIC, pblk->close_wq);
-
-	pblk_free_rqd(pblk, rqd, PBLK_WRITE_INT);
-
-	atomic_dec(&pblk->inflight_io);
-}
-
-static int pblk_alloc_w_rq(struct pblk *pblk, struct nvm_rq *rqd,
-			   unsigned int nr_secs, nvm_end_io_fn(*end_io))
-{
-	/* Setup write request */
-	rqd->opcode = NVM_OP_PWRITE;
-	rqd->nr_ppas = nr_secs;
-	rqd->is_seq = 1;
-	rqd->private = pblk;
-	rqd->end_io = end_io;
-
-	return pblk_alloc_rqd_meta(pblk, rqd);
-}
-
-static int pblk_setup_w_rq(struct pblk *pblk, struct nvm_rq *rqd,
-			   struct ppa_addr *erase_ppa)
-{
-	struct pblk_line_meta *lm = &pblk->lm;
-	struct pblk_line *e_line = pblk_line_get_erase(pblk);
-	struct pblk_c_ctx *c_ctx = nvm_rq_to_pdu(rqd);
-	unsigned int valid = c_ctx->nr_valid;
-	unsigned int padded = c_ctx->nr_padded;
-	unsigned int nr_secs = valid + padded;
-	unsigned long *lun_bitmap;
-	int ret;
-
-	lun_bitmap = kzalloc(lm->lun_bitmap_len, GFP_KERNEL);
-	if (!lun_bitmap)
-		return -ENOMEM;
-	c_ctx->lun_bitmap = lun_bitmap;
-
-	ret = pblk_alloc_w_rq(pblk, rqd, nr_secs, pblk_end_io_write);
-	if (ret) {
-		kfree(lun_bitmap);
-		return ret;
-	}
-
-	if (likely(!e_line || !atomic_read(&e_line->left_eblks)))
-		ret = pblk_map_rq(pblk, rqd, c_ctx->sentry, lun_bitmap,
-							valid, 0);
-	else
-		ret = pblk_map_erase_rq(pblk, rqd, c_ctx->sentry, lun_bitmap,
-							valid, erase_ppa);
-
-	return ret;
-}
-
-static int pblk_calc_secs_to_sync(struct pblk *pblk, unsigned int secs_avail,
-				  unsigned int secs_to_flush)
-{
-	int secs_to_sync;
-
-	secs_to_sync = pblk_calc_secs(pblk, secs_avail, secs_to_flush, true);
-
-#ifdef CONFIG_NVM_PBLK_DEBUG
-	if ((!secs_to_sync && secs_to_flush)
-			|| (secs_to_sync < 0)
-			|| (secs_to_sync > secs_avail && !secs_to_flush)) {
-		pblk_err(pblk, "bad sector calculation (a:%d,s:%d,f:%d)\n",
-				secs_avail, secs_to_sync, secs_to_flush);
-	}
-#endif
-
-	return secs_to_sync;
-}
-
-int pblk_submit_meta_io(struct pblk *pblk, struct pblk_line *meta_line)
-{
-	struct nvm_tgt_dev *dev = pblk->dev;
-	struct nvm_geo *geo = &dev->geo;
-	struct pblk_line_mgmt *l_mg = &pblk->l_mg;
-	struct pblk_line_meta *lm = &pblk->lm;
-	struct pblk_emeta *emeta = meta_line->emeta;
-	struct ppa_addr *ppa_list;
-	struct pblk_g_ctx *m_ctx;
-	struct nvm_rq *rqd;
-	void *data;
-	u64 paddr;
-	int rq_ppas = pblk->min_write_pgs;
-	int id = meta_line->id;
-	int rq_len;
-	int i, j;
-	int ret;
-
-	rqd = pblk_alloc_rqd(pblk, PBLK_WRITE_INT);
-
-	m_ctx = nvm_rq_to_pdu(rqd);
-	m_ctx->private = meta_line;
-
-	rq_len = rq_ppas * geo->csecs;
-	data = ((void *)emeta->buf) + emeta->mem;
-
-	ret = pblk_alloc_w_rq(pblk, rqd, rq_ppas, pblk_end_io_write_meta);
-	if (ret)
-		goto fail_free_rqd;
-
-	ppa_list = nvm_rq_to_ppa_list(rqd);
-	for (i = 0; i < rqd->nr_ppas; ) {
-		spin_lock(&meta_line->lock);
-		paddr = __pblk_alloc_page(pblk, meta_line, rq_ppas);
-		spin_unlock(&meta_line->lock);
-		for (j = 0; j < rq_ppas; j++, i++, paddr++)
-			ppa_list[i] = addr_to_gen_ppa(pblk, paddr, id);
-	}
-
-	spin_lock(&l_mg->close_lock);
-	emeta->mem += rq_len;
-	if (emeta->mem >= lm->emeta_len[0])
-		list_del(&meta_line->list);
-	spin_unlock(&l_mg->close_lock);
-
-	pblk_down_chunk(pblk, ppa_list[0]);
-
-	ret = pblk_submit_io(pblk, rqd, data);
-	if (ret) {
-		pblk_err(pblk, "emeta I/O submission failed: %d\n", ret);
-		goto fail_rollback;
-	}
-
-	return NVM_IO_OK;
-
-fail_rollback:
-	pblk_up_chunk(pblk, ppa_list[0]);
-	spin_lock(&l_mg->close_lock);
-	pblk_dealloc_page(pblk, meta_line, rq_ppas);
-	list_add(&meta_line->list, &meta_line->list);
-	spin_unlock(&l_mg->close_lock);
-fail_free_rqd:
-	pblk_free_rqd(pblk, rqd, PBLK_WRITE_INT);
-	return ret;
-}
-
-static inline bool pblk_valid_meta_ppa(struct pblk *pblk,
-				       struct pblk_line *meta_line,
-				       struct nvm_rq *data_rqd)
-{
-	struct nvm_tgt_dev *dev = pblk->dev;
-	struct nvm_geo *geo = &dev->geo;
-	struct pblk_c_ctx *data_c_ctx = nvm_rq_to_pdu(data_rqd);
-	struct pblk_line *data_line = pblk_line_get_data(pblk);
-	struct ppa_addr ppa, ppa_opt;
-	u64 paddr;
-	int pos_opt;
-
-	/* Schedule a metadata I/O that is half the distance from the data I/O
-	 * with regards to the number of LUNs forming the pblk instance. This
-	 * balances LUN conflicts across every I/O.
-	 *
-	 * When the LUN configuration changes (e.g., due to GC), this distance
-	 * can align, which would result on metadata and data I/Os colliding. In
-	 * this case, modify the distance to not be optimal, but move the
-	 * optimal in the right direction.
-	 */
-	paddr = pblk_lookup_page(pblk, meta_line);
-	ppa = addr_to_gen_ppa(pblk, paddr, 0);
-	ppa_opt = addr_to_gen_ppa(pblk, paddr + data_line->meta_distance, 0);
-	pos_opt = pblk_ppa_to_pos(geo, ppa_opt);
-
-	if (test_bit(pos_opt, data_c_ctx->lun_bitmap) ||
-				test_bit(pos_opt, data_line->blk_bitmap))
-		return true;
-
-	if (unlikely(pblk_ppa_comp(ppa_opt, ppa)))
-		data_line->meta_distance--;
-
-	return false;
-}
-
-static struct pblk_line *pblk_should_submit_meta_io(struct pblk *pblk,
-						    struct nvm_rq *data_rqd)
-{
-	struct pblk_line_meta *lm = &pblk->lm;
-	struct pblk_line_mgmt *l_mg = &pblk->l_mg;
-	struct pblk_line *meta_line;
-
-	spin_lock(&l_mg->close_lock);
-	if (list_empty(&l_mg->emeta_list)) {
-		spin_unlock(&l_mg->close_lock);
-		return NULL;
-	}
-	meta_line = list_first_entry(&l_mg->emeta_list, struct pblk_line, list);
-	if (meta_line->emeta->mem >= lm->emeta_len[0]) {
-		spin_unlock(&l_mg->close_lock);
-		return NULL;
-	}
-	spin_unlock(&l_mg->close_lock);
-
-	if (!pblk_valid_meta_ppa(pblk, meta_line, data_rqd))
-		return NULL;
-
-	return meta_line;
-}
-
-static int pblk_submit_io_set(struct pblk *pblk, struct nvm_rq *rqd)
-{
-	struct ppa_addr erase_ppa;
-	struct pblk_line *meta_line;
-	int err;
-
-	pblk_ppa_set_empty(&erase_ppa);
-
-	/* Assign lbas to ppas and populate request structure */
-	err = pblk_setup_w_rq(pblk, rqd, &erase_ppa);
-	if (err) {
-		pblk_err(pblk, "could not setup write request: %d\n", err);
-		return NVM_IO_ERR;
-	}
-
-	meta_line = pblk_should_submit_meta_io(pblk, rqd);
-
-	/* Submit data write for current data line */
-	err = pblk_submit_io(pblk, rqd, NULL);
-	if (err) {
-		pblk_err(pblk, "data I/O submission failed: %d\n", err);
-		return NVM_IO_ERR;
-	}
-
-	if (!pblk_ppa_empty(erase_ppa)) {
-		/* Submit erase for next data line */
-		if (pblk_blk_erase_async(pblk, erase_ppa)) {
-			struct pblk_line *e_line = pblk_line_get_erase(pblk);
-			struct nvm_tgt_dev *dev = pblk->dev;
-			struct nvm_geo *geo = &dev->geo;
-			int bit;
-
-			atomic_inc(&e_line->left_eblks);
-			bit = pblk_ppa_to_pos(geo, erase_ppa);
-			WARN_ON(!test_and_clear_bit(bit, e_line->erase_bitmap));
-		}
-	}
-
-	if (meta_line) {
-		/* Submit metadata write for previous data line */
-		err = pblk_submit_meta_io(pblk, meta_line);
-		if (err) {
-			pblk_err(pblk, "metadata I/O submission failed: %d",
-					err);
-			return NVM_IO_ERR;
-		}
-	}
-
-	return NVM_IO_OK;
-}
-
-static void pblk_free_write_rqd(struct pblk *pblk, struct nvm_rq *rqd)
-{
-	struct pblk_c_ctx *c_ctx = nvm_rq_to_pdu(rqd);
-	struct bio *bio = rqd->bio;
-
-	if (c_ctx->nr_padded)
-		pblk_bio_free_pages(pblk, bio, c_ctx->nr_valid,
-							c_ctx->nr_padded);
-}
-
-static int pblk_submit_write(struct pblk *pblk, int *secs_left)
-{
-	struct bio *bio;
-	struct nvm_rq *rqd;
-	unsigned int secs_avail, secs_to_sync, secs_to_com;
-	unsigned int secs_to_flush, packed_meta_pgs;
-	unsigned long pos;
-	unsigned int resubmit;
-
-	*secs_left = 0;
-
-	spin_lock(&pblk->resubmit_lock);
-	resubmit = !list_empty(&pblk->resubmit_list);
-	spin_unlock(&pblk->resubmit_lock);
-
-	/* Resubmit failed writes first */
-	if (resubmit) {
-		struct pblk_c_ctx *r_ctx;
-
-		spin_lock(&pblk->resubmit_lock);
-		r_ctx = list_first_entry(&pblk->resubmit_list,
-					struct pblk_c_ctx, list);
-		list_del(&r_ctx->list);
-		spin_unlock(&pblk->resubmit_lock);
-
-		secs_avail = r_ctx->nr_valid;
-		pos = r_ctx->sentry;
-
-		pblk_prepare_resubmit(pblk, pos, secs_avail);
-		secs_to_sync = pblk_calc_secs_to_sync(pblk, secs_avail,
-				secs_avail);
-
-		kfree(r_ctx);
-	} else {
-		/* If there are no sectors in the cache,
-		 * flushes (bios without data) will be cleared on
-		 * the cache threads
-		 */
-		secs_avail = pblk_rb_read_count(&pblk->rwb);
-		if (!secs_avail)
-			return 0;
-
-		secs_to_flush = pblk_rb_flush_point_count(&pblk->rwb);
-		if (!secs_to_flush && secs_avail < pblk->min_write_pgs_data)
-			return 0;
-
-		secs_to_sync = pblk_calc_secs_to_sync(pblk, secs_avail,
-					secs_to_flush);
-		if (secs_to_sync > pblk->max_write_pgs) {
-			pblk_err(pblk, "bad buffer sync calculation\n");
-			return 0;
-		}
-
-		secs_to_com = (secs_to_sync > secs_avail) ?
-			secs_avail : secs_to_sync;
-		pos = pblk_rb_read_commit(&pblk->rwb, secs_to_com);
-	}
-
-	packed_meta_pgs = (pblk->min_write_pgs - pblk->min_write_pgs_data);
-	bio = bio_alloc(GFP_KERNEL, secs_to_sync + packed_meta_pgs);
-
-	bio->bi_iter.bi_sector = 0; /* internal bio */
-	bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
-
-	rqd = pblk_alloc_rqd(pblk, PBLK_WRITE);
-	rqd->bio = bio;
-
-	if (pblk_rb_read_to_bio(&pblk->rwb, rqd, pos, secs_to_sync,
-								secs_avail)) {
-		pblk_err(pblk, "corrupted write bio\n");
-		goto fail_put_bio;
-	}
-
-	if (pblk_submit_io_set(pblk, rqd))
-		goto fail_free_bio;
-
-#ifdef CONFIG_NVM_PBLK_DEBUG
-	atomic_long_add(secs_to_sync, &pblk->sub_writes);
-#endif
-
-	*secs_left = 1;
-	return 0;
-
-fail_free_bio:
-	pblk_free_write_rqd(pblk, rqd);
-fail_put_bio:
-	bio_put(bio);
-	pblk_free_rqd(pblk, rqd, PBLK_WRITE);
-
-	return -EINTR;
-}
-
-int pblk_write_ts(void *data)
-{
-	struct pblk *pblk = data;
-	int secs_left;
-	int write_failure = 0;
-
-	while (!kthread_should_stop()) {
-		if (!write_failure) {
-			write_failure = pblk_submit_write(pblk, &secs_left);
-
-			if (secs_left)
-				continue;
-		}
-		set_current_state(TASK_INTERRUPTIBLE);
-		io_schedule();
-	}
-
-	return 0;
-}
diff --git a/drivers/lightnvm/pblk.h b/drivers/lightnvm/pblk.h
deleted file mode 100644
index 86ffa875bfe1..000000000000
--- a/drivers/lightnvm/pblk.h
+++ /dev/null
@@ -1,1358 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * Copyright (C) 2015 IT University of Copenhagen (rrpc.h)
- * Copyright (C) 2016 CNEX Labs
- * Initial release: Matias Bjorling <matias@cnexlabs.com>
- * Write buffering: Javier Gonzalez <javier@cnexlabs.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License version
- * 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * Implementation of a Physical Block-device target for Open-channel SSDs.
- *
- */
-
-#ifndef PBLK_H_
-#define PBLK_H_
-
-#include <linux/blkdev.h>
-#include <linux/blk-mq.h>
-#include <linux/bio.h>
-#include <linux/module.h>
-#include <linux/kthread.h>
-#include <linux/vmalloc.h>
-#include <linux/crc32.h>
-#include <linux/uuid.h>
-
-#include <linux/lightnvm.h>
-
-/* Run only GC if less than 1/X blocks are free */
-#define GC_LIMIT_INVERSE 5
-#define GC_TIME_MSECS 1000
-
-#define PBLK_SECTOR (512)
-#define PBLK_EXPOSED_PAGE_SIZE (4096)
-
-#define PBLK_NR_CLOSE_JOBS (4)
-
-#define PBLK_CACHE_NAME_LEN (DISK_NAME_LEN + 16)
-
-/* Max 512 LUNs per device */
-#define PBLK_MAX_LUNS_BITMAP (4)
-
-#define NR_PHY_IN_LOG (PBLK_EXPOSED_PAGE_SIZE / PBLK_SECTOR)
-
-/* Static pool sizes */
-#define PBLK_GEN_WS_POOL_SIZE (2)
-
-#define PBLK_DEFAULT_OP (11)
-
-enum {
-	PBLK_READ		= READ,
-	PBLK_WRITE		= WRITE,/* Write from write buffer */
-	PBLK_WRITE_INT,			/* Internal write - no write buffer */
-	PBLK_READ_RECOV,		/* Recovery read - errors allowed */
-	PBLK_ERASE,
-};
-
-enum {
-	/* IO Types */
-	PBLK_IOTYPE_USER	= 1 << 0,
-	PBLK_IOTYPE_GC		= 1 << 1,
-
-	/* Write buffer flags */
-	PBLK_FLUSH_ENTRY	= 1 << 2,
-	PBLK_WRITTEN_DATA	= 1 << 3,
-	PBLK_SUBMITTED_ENTRY	= 1 << 4,
-	PBLK_WRITABLE_ENTRY	= 1 << 5,
-};
-
-enum {
-	PBLK_BLK_ST_OPEN =	0x1,
-	PBLK_BLK_ST_CLOSED =	0x2,
-};
-
-enum {
-	PBLK_CHUNK_RESET_START,
-	PBLK_CHUNK_RESET_DONE,
-	PBLK_CHUNK_RESET_FAILED,
-};
-
-struct pblk_sec_meta {
-	u64 reserved;
-	__le64 lba;
-};
-
-/* The number of GC lists and the rate-limiter states go together. This way the
- * rate-limiter can dictate how much GC is needed based on resource utilization.
- */
-#define PBLK_GC_NR_LISTS 4
-
-enum {
-	PBLK_RL_OFF = 0,
-	PBLK_RL_WERR = 1,
-	PBLK_RL_HIGH = 2,
-	PBLK_RL_MID = 3,
-	PBLK_RL_LOW = 4
-};
-
-#define pblk_dma_ppa_size (sizeof(u64) * NVM_MAX_VLBA)
-
-/* write buffer completion context */
-struct pblk_c_ctx {
-	struct list_head list;		/* Head for out-of-order completion */
-
-	unsigned long *lun_bitmap;	/* Luns used on current request */
-	unsigned int sentry;
-	unsigned int nr_valid;
-	unsigned int nr_padded;
-};
-
-/* read context */
-struct pblk_g_ctx {
-	void *private;
-	unsigned long start_time;
-	u64 lba;
-};
-
-/* Pad context */
-struct pblk_pad_rq {
-	struct pblk *pblk;
-	struct completion wait;
-	struct kref ref;
-};
-
-/* Recovery context */
-struct pblk_rec_ctx {
-	struct pblk *pblk;
-	struct nvm_rq *rqd;
-	struct work_struct ws_rec;
-};
-
-/* Write context */
-struct pblk_w_ctx {
-	struct bio_list bios;		/* Original bios - used for completion
-					 * in REQ_FUA, REQ_FLUSH case
-					 */
-	u64 lba;			/* Logic addr. associated with entry */
-	struct ppa_addr ppa;		/* Physic addr. associated with entry */
-	int flags;			/* Write context flags */
-};
-
-struct pblk_rb_entry {
-	struct ppa_addr cacheline;	/* Cacheline for this entry */
-	void *data;			/* Pointer to data on this entry */
-	struct pblk_w_ctx w_ctx;	/* Context for this entry */
-	struct list_head index;		/* List head to enable indexes */
-};
-
-#define EMPTY_ENTRY (~0U)
-
-struct pblk_rb_pages {
-	struct page *pages;
-	int order;
-	struct list_head list;
-};
-
-struct pblk_rb {
-	struct pblk_rb_entry *entries;	/* Ring buffer entries */
-	unsigned int mem;		/* Write offset - points to next
-					 * writable entry in memory
-					 */
-	unsigned int subm;		/* Read offset - points to last entry
-					 * that has been submitted to the media
-					 * to be persisted
-					 */
-	unsigned int sync;		/* Synced - backpointer that signals
-					 * the last submitted entry that has
-					 * been successfully persisted to media
-					 */
-	unsigned int flush_point;	/* Sync point - last entry that must be
-					 * flushed to the media. Used with
-					 * REQ_FLUSH and REQ_FUA
-					 */
-	unsigned int l2p_update;	/* l2p update point - next entry for
-					 * which l2p mapping will be updated to
-					 * contain a device ppa address (instead
-					 * of a cacheline
-					 */
-	unsigned int nr_entries;	/* Number of entries in write buffer -
-					 * must be a power of two
-					 */
-	unsigned int seg_size;		/* Size of the data segments being
-					 * stored on each entry. Typically this
-					 * will be 4KB
-					 */
-
-	unsigned int back_thres;	/* Threshold that shall be maintained by
-					 * the backpointer in order to respect
-					 * geo->mw_cunits on a per chunk basis
-					 */
-
-	struct list_head pages;		/* List of data pages */
-
-	spinlock_t w_lock;		/* Write lock */
-	spinlock_t s_lock;		/* Sync lock */
-
-#ifdef CONFIG_NVM_PBLK_DEBUG
-	atomic_t inflight_flush_point;	/* Not served REQ_FLUSH | REQ_FUA */
-#endif
-};
-
-#define PBLK_RECOVERY_SECTORS 16
-
-struct pblk_lun {
-	struct ppa_addr bppa;
-	struct semaphore wr_sem;
-};
-
-struct pblk_gc_rq {
-	struct pblk_line *line;
-	void *data;
-	u64 paddr_list[NVM_MAX_VLBA];
-	u64 lba_list[NVM_MAX_VLBA];
-	int nr_secs;
-	int secs_to_gc;
-	struct list_head list;
-};
-
-struct pblk_gc {
-	/* These states are not protected by a lock since (i) they are in the
-	 * fast path, and (ii) they are not critical.
-	 */
-	int gc_active;
-	int gc_enabled;
-	int gc_forced;
-
-	struct task_struct *gc_ts;
-	struct task_struct *gc_writer_ts;
-	struct task_struct *gc_reader_ts;
-
-	struct workqueue_struct *gc_line_reader_wq;
-	struct workqueue_struct *gc_reader_wq;
-
-	struct timer_list gc_timer;
-
-	struct semaphore gc_sem;
-	atomic_t read_inflight_gc; /* Number of lines with inflight GC reads */
-	atomic_t pipeline_gc;	   /* Number of lines in the GC pipeline -
-				    * started reads to finished writes
-				    */
-	int w_entries;
-
-	struct list_head w_list;
-	struct list_head r_list;
-
-	spinlock_t lock;
-	spinlock_t w_lock;
-	spinlock_t r_lock;
-};
-
-struct pblk_rl {
-	unsigned int high;	/* Upper threshold for rate limiter (free run -
-				 * user I/O rate limiter
-				 */
-	unsigned int high_pw;	/* High rounded up as a power of 2 */
-
-#define PBLK_USER_HIGH_THRS 8	/* Begin write limit at 12% available blks */
-#define PBLK_USER_LOW_THRS 10	/* Aggressive GC at 10% available blocks */
-
-	int rb_windows_pw;	/* Number of rate windows in the write buffer
-				 * given as a power-of-2. This guarantees that
-				 * when user I/O is being rate limited, there
-				 * will be reserved enough space for the GC to
-				 * place its payload. A window is of
-				 * pblk->max_write_pgs size, which in NVMe is
-				 * 64, i.e., 256kb.
-				 */
-	int rb_budget;		/* Total number of entries available for I/O */
-	int rb_user_max;	/* Max buffer entries available for user I/O */
-	int rb_gc_max;		/* Max buffer entries available for GC I/O */
-	int rb_gc_rsv;		/* Reserved buffer entries for GC I/O */
-	int rb_state;		/* Rate-limiter current state */
-	int rb_max_io;		/* Maximum size for an I/O giving the config */
-
-	atomic_t rb_user_cnt;	/* User I/O buffer counter */
-	atomic_t rb_gc_cnt;	/* GC I/O buffer counter */
-	atomic_t rb_space;	/* Space limit in case of reaching capacity */
-
-	int rsv_blocks;		/* Reserved blocks for GC */
-
-	int rb_user_active;
-	int rb_gc_active;
-
-	atomic_t werr_lines;	/* Number of write error lines that needs gc */
-
-	struct timer_list u_timer;
-
-	unsigned long total_blocks;
-
-	atomic_t free_blocks;		/* Total number of free blocks (+ OP) */
-	atomic_t free_user_blocks;	/* Number of user free blocks (no OP) */
-};
-
-#define PBLK_LINE_EMPTY (~0U)
-
-enum {
-	/* Line Types */
-	PBLK_LINETYPE_FREE = 0,
-	PBLK_LINETYPE_LOG = 1,
-	PBLK_LINETYPE_DATA = 2,
-
-	/* Line state */
-	PBLK_LINESTATE_NEW = 9,
-	PBLK_LINESTATE_FREE = 10,
-	PBLK_LINESTATE_OPEN = 11,
-	PBLK_LINESTATE_CLOSED = 12,
-	PBLK_LINESTATE_GC = 13,
-	PBLK_LINESTATE_BAD = 14,
-	PBLK_LINESTATE_CORRUPT = 15,
-
-	/* GC group */
-	PBLK_LINEGC_NONE = 20,
-	PBLK_LINEGC_EMPTY = 21,
-	PBLK_LINEGC_LOW = 22,
-	PBLK_LINEGC_MID = 23,
-	PBLK_LINEGC_HIGH = 24,
-	PBLK_LINEGC_FULL = 25,
-	PBLK_LINEGC_WERR = 26
-};
-
-#define PBLK_MAGIC 0x70626c6b /*pblk*/
-
-/* emeta/smeta persistent storage format versions:
- * Changes in major version requires offline migration.
- * Changes in minor version are handled automatically during
- * recovery.
- */
-
-#define SMETA_VERSION_MAJOR (0)
-#define SMETA_VERSION_MINOR (1)
-
-#define EMETA_VERSION_MAJOR (0)
-#define EMETA_VERSION_MINOR (2)
-
-struct line_header {
-	__le32 crc;
-	__le32 identifier;	/* pblk identifier */
-	__u8 uuid[16];		/* instance uuid */
-	__le16 type;		/* line type */
-	__u8 version_major;	/* version major */
-	__u8 version_minor;	/* version minor */
-	__le32 id;		/* line id for current line */
-};
-
-struct line_smeta {
-	struct line_header header;
-
-	__le32 crc;		/* Full structure including struct crc */
-	/* Previous line metadata */
-	__le32 prev_id;		/* Line id for previous line */
-
-	/* Current line metadata */
-	__le64 seq_nr;		/* Sequence number for current line */
-
-	/* Active writers */
-	__le32 window_wr_lun;	/* Number of parallel LUNs to write */
-
-	__le32 rsvd[2];
-
-	__le64 lun_bitmap[];
-};
-
-
-/*
- * Metadata layout in media:
- *	First sector:
- *		1. struct line_emeta
- *		2. bad block bitmap (u64 * window_wr_lun)
- *		3. write amplification counters
- *	Mid sectors (start at lbas_sector):
- *		3. nr_lbas (u64) forming lba list
- *	Last sectors (start at vsc_sector):
- *		4. u32 valid sector count (vsc) for all lines (~0U: free line)
- */
-struct line_emeta {
-	struct line_header header;
-
-	__le32 crc;		/* Full structure including struct crc */
-
-	/* Previous line metadata */
-	__le32 prev_id;		/* Line id for prev line */
-
-	/* Current line metadata */
-	__le64 seq_nr;		/* Sequence number for current line */
-
-	/* Active writers */
-	__le32 window_wr_lun;	/* Number of parallel LUNs to write */
-
-	/* Bookkeeping for recovery */
-	__le32 next_id;		/* Line id for next line */
-	__le64 nr_lbas;		/* Number of lbas mapped in line */
-	__le64 nr_valid_lbas;	/* Number of valid lbas mapped in line */
-	__le64 bb_bitmap[];     /* Updated bad block bitmap for line */
-};
-
-
-/* Write amplification counters stored on media */
-struct wa_counters {
-	__le64 user;		/* Number of user written sectors */
-	__le64 gc;		/* Number of sectors written by GC*/
-	__le64 pad;		/* Number of padded sectors */
-};
-
-struct pblk_emeta {
-	struct line_emeta *buf;		/* emeta buffer in media format */
-	int mem;			/* Write offset - points to next
-					 * writable entry in memory
-					 */
-	atomic_t sync;			/* Synced - backpointer that signals the
-					 * last entry that has been successfully
-					 * persisted to media
-					 */
-	unsigned int nr_entries;	/* Number of emeta entries */
-};
-
-struct pblk_smeta {
-	struct line_smeta *buf;		/* smeta buffer in persistent format */
-};
-
-struct pblk_w_err_gc {
-	int has_write_err;
-	int has_gc_err;
-	__le64 *lba_list;
-};
-
-struct pblk_line {
-	struct pblk *pblk;
-	unsigned int id;		/* Line number corresponds to the
-					 * block line
-					 */
-	unsigned int seq_nr;		/* Unique line sequence number */
-
-	int state;			/* PBLK_LINESTATE_X */
-	int type;			/* PBLK_LINETYPE_X */
-	int gc_group;			/* PBLK_LINEGC_X */
-	struct list_head list;		/* Free, GC lists */
-
-	unsigned long *lun_bitmap;	/* Bitmap for LUNs mapped in line */
-
-	struct nvm_chk_meta *chks;	/* Chunks forming line */
-
-	struct pblk_smeta *smeta;	/* Start metadata */
-	struct pblk_emeta *emeta;	/* End medatada */
-
-	int meta_line;			/* Metadata line id */
-	int meta_distance;		/* Distance between data and metadata */
-
-	u64 emeta_ssec;			/* Sector where emeta starts */
-
-	unsigned int sec_in_line;	/* Number of usable secs in line */
-
-	atomic_t blk_in_line;		/* Number of good blocks in line */
-	unsigned long *blk_bitmap;	/* Bitmap for valid/invalid blocks */
-	unsigned long *erase_bitmap;	/* Bitmap for erased blocks */
-
-	unsigned long *map_bitmap;	/* Bitmap for mapped sectors in line */
-	unsigned long *invalid_bitmap;	/* Bitmap for invalid sectors in line */
-
-	atomic_t left_eblks;		/* Blocks left for erasing */
-	atomic_t left_seblks;		/* Blocks left for sync erasing */
-
-	int left_msecs;			/* Sectors left for mapping */
-	unsigned int cur_sec;		/* Sector map pointer */
-	unsigned int nr_valid_lbas;	/* Number of valid lbas in line */
-
-	__le32 *vsc;			/* Valid sector count in line */
-
-	struct kref ref;		/* Write buffer L2P references */
-	atomic_t sec_to_update;         /* Outstanding L2P updates to ppa */
-
-	struct pblk_w_err_gc *w_err_gc;	/* Write error gc recovery metadata */
-
-	spinlock_t lock;		/* Necessary for invalid_bitmap only */
-};
-
-#define PBLK_DATA_LINES 4
-
-enum {
-	PBLK_EMETA_TYPE_HEADER = 1,	/* struct line_emeta first sector */
-	PBLK_EMETA_TYPE_LLBA = 2,	/* lba list - type: __le64 */
-	PBLK_EMETA_TYPE_VSC = 3,	/* vsc list - type: __le32 */
-};
-
-struct pblk_line_mgmt {
-	int nr_lines;			/* Total number of full lines */
-	int nr_free_lines;		/* Number of full lines in free list */
-
-	/* Free lists - use free_lock */
-	struct list_head free_list;	/* Full lines ready to use */
-	struct list_head corrupt_list;	/* Full lines corrupted */
-	struct list_head bad_list;	/* Full lines bad */
-
-	/* GC lists - use gc_lock */
-	struct list_head *gc_lists[PBLK_GC_NR_LISTS];
-	struct list_head gc_high_list;	/* Full lines ready to GC, high isc */
-	struct list_head gc_mid_list;	/* Full lines ready to GC, mid isc */
-	struct list_head gc_low_list;	/* Full lines ready to GC, low isc */
-
-	struct list_head gc_werr_list;  /* Write err recovery list */
-
-	struct list_head gc_full_list;	/* Full lines ready to GC, no valid */
-	struct list_head gc_empty_list;	/* Full lines close, all valid */
-
-	struct pblk_line *log_line;	/* Current FTL log line */
-	struct pblk_line *data_line;	/* Current data line */
-	struct pblk_line *log_next;	/* Next FTL log line */
-	struct pblk_line *data_next;	/* Next data line */
-
-	struct list_head emeta_list;	/* Lines queued to schedule emeta */
-
-	__le32 *vsc_list;		/* Valid sector counts for all lines */
-
-	/* Pre-allocated metadata for data lines */
-	struct pblk_smeta *sline_meta[PBLK_DATA_LINES];
-	struct pblk_emeta *eline_meta[PBLK_DATA_LINES];
-	unsigned long meta_bitmap;
-
-	/* Cache and mempool for map/invalid bitmaps */
-	struct kmem_cache *bitmap_cache;
-	mempool_t *bitmap_pool;
-
-	/* Helpers for fast bitmap calculations */
-	unsigned long *bb_template;
-	unsigned long *bb_aux;
-
-	unsigned long d_seq_nr;		/* Data line unique sequence number */
-	unsigned long l_seq_nr;		/* Log line unique sequence number */
-
-	spinlock_t free_lock;
-	spinlock_t close_lock;
-	spinlock_t gc_lock;
-};
-
-struct pblk_line_meta {
-	unsigned int smeta_len;		/* Total length for smeta */
-	unsigned int smeta_sec;		/* Sectors needed for smeta */
-
-	unsigned int emeta_len[4];	/* Lengths for emeta:
-					 *  [0]: Total
-					 *  [1]: struct line_emeta +
-					 *       bb_bitmap + struct wa_counters
-					 *  [2]: L2P portion
-					 *  [3]: vsc
-					 */
-	unsigned int emeta_sec[4];	/* Sectors needed for emeta. Same layout
-					 * as emeta_len
-					 */
-
-	unsigned int emeta_bb;		/* Boundary for bb that affects emeta */
-
-	unsigned int vsc_list_len;	/* Length for vsc list */
-	unsigned int sec_bitmap_len;	/* Length for sector bitmap in line */
-	unsigned int blk_bitmap_len;	/* Length for block bitmap in line */
-	unsigned int lun_bitmap_len;	/* Length for lun bitmap in line */
-
-	unsigned int blk_per_line;	/* Number of blocks in a full line */
-	unsigned int sec_per_line;	/* Number of sectors in a line */
-	unsigned int dsec_per_line;	/* Number of data sectors in a line */
-	unsigned int min_blk_line;	/* Min. number of good blocks in line */
-
-	unsigned int mid_thrs;		/* Threshold for GC mid list */
-	unsigned int high_thrs;		/* Threshold for GC high list */
-
-	unsigned int meta_distance;	/* Distance between data and metadata */
-};
-
-enum {
-	PBLK_STATE_RUNNING = 0,
-	PBLK_STATE_STOPPING = 1,
-	PBLK_STATE_RECOVERING = 2,
-	PBLK_STATE_STOPPED = 3,
-};
-
-/* Internal format to support not power-of-2 device formats */
-struct pblk_addrf {
-	/* gen to dev */
-	int sec_stripe;
-	int ch_stripe;
-	int lun_stripe;
-
-	/* dev to gen */
-	int sec_lun_stripe;
-	int sec_ws_stripe;
-};
-
-struct pblk {
-	struct nvm_tgt_dev *dev;
-	struct gendisk *disk;
-
-	struct kobject kobj;
-
-	struct pblk_lun *luns;
-
-	struct pblk_line *lines;		/* Line array */
-	struct pblk_line_mgmt l_mg;		/* Line management */
-	struct pblk_line_meta lm;		/* Line metadata */
-
-	struct nvm_addrf addrf;		/* Aligned address format */
-	struct pblk_addrf uaddrf;	/* Unaligned address format */
-	int addrf_len;
-
-	struct pblk_rb rwb;
-
-	int state;			/* pblk line state */
-
-	int min_write_pgs; /* Minimum amount of pages required by controller */
-	int min_write_pgs_data; /* Minimum amount of payload pages */
-	int max_write_pgs; /* Maximum amount of pages supported by controller */
-	int oob_meta_size; /* Size of OOB sector metadata */
-
-	sector_t capacity; /* Device capacity when bad blocks are subtracted */
-
-	int op;      /* Percentage of device used for over-provisioning */
-	int op_blks; /* Number of blocks used for over-provisioning */
-
-	/* pblk provisioning values. Used by rate limiter */
-	struct pblk_rl rl;
-
-	int sec_per_write;
-
-	guid_t instance_uuid;
-
-	/* Persistent write amplification counters, 4kb sector I/Os */
-	atomic64_t user_wa;		/* Sectors written by user */
-	atomic64_t gc_wa;		/* Sectors written by GC */
-	atomic64_t pad_wa;		/* Padded sectors written */
-
-	/* Reset values for delta write amplification measurements */
-	u64 user_rst_wa;
-	u64 gc_rst_wa;
-	u64 pad_rst_wa;
-
-	/* Counters used for calculating padding distribution */
-	atomic64_t *pad_dist;		/* Padding distribution buckets */
-	u64 nr_flush_rst;		/* Flushes reset value for pad dist.*/
-	atomic64_t nr_flush;		/* Number of flush/fua I/O */
-
-#ifdef CONFIG_NVM_PBLK_DEBUG
-	/* Non-persistent debug counters, 4kb sector I/Os */
-	atomic_long_t inflight_writes;	/* Inflight writes (user and gc) */
-	atomic_long_t padded_writes;	/* Sectors padded due to flush/fua */
-	atomic_long_t padded_wb;	/* Sectors padded in write buffer */
-	atomic_long_t req_writes;	/* Sectors stored on write buffer */
-	atomic_long_t sub_writes;	/* Sectors submitted from buffer */
-	atomic_long_t sync_writes;	/* Sectors synced to media */
-	atomic_long_t inflight_reads;	/* Inflight sector read requests */
-	atomic_long_t cache_reads;	/* Read requests that hit the cache */
-	atomic_long_t sync_reads;	/* Completed sector read requests */
-	atomic_long_t recov_writes;	/* Sectors submitted from recovery */
-	atomic_long_t recov_gc_writes;	/* Sectors submitted from write GC */
-	atomic_long_t recov_gc_reads;	/* Sectors submitted from read GC */
-#endif
-
-	spinlock_t lock;
-
-	atomic_long_t read_failed;
-	atomic_long_t read_empty;
-	atomic_long_t read_high_ecc;
-	atomic_long_t read_failed_gc;
-	atomic_long_t write_failed;
-	atomic_long_t erase_failed;
-
-	atomic_t inflight_io;		/* General inflight I/O counter */
-
-	struct task_struct *writer_ts;
-
-	/* Simple translation map of logical addresses to physical addresses.
-	 * The logical addresses is known by the host system, while the physical
-	 * addresses are used when writing to the disk block device.
-	 */
-	unsigned char *trans_map;
-	spinlock_t trans_lock;
-
-	struct list_head compl_list;
-
-	spinlock_t resubmit_lock;	 /* Resubmit list lock */
-	struct list_head resubmit_list; /* Resubmit list for failed writes*/
-
-	mempool_t page_bio_pool;
-	mempool_t gen_ws_pool;
-	mempool_t rec_pool;
-	mempool_t r_rq_pool;
-	mempool_t w_rq_pool;
-	mempool_t e_rq_pool;
-
-	struct workqueue_struct *close_wq;
-	struct workqueue_struct *bb_wq;
-	struct workqueue_struct *r_end_wq;
-
-	struct timer_list wtimer;
-
-	struct pblk_gc gc;
-};
-
-struct pblk_line_ws {
-	struct pblk *pblk;
-	struct pblk_line *line;
-	void *priv;
-	struct work_struct ws;
-};
-
-#define pblk_g_rq_size (sizeof(struct nvm_rq) + sizeof(struct pblk_g_ctx))
-#define pblk_w_rq_size (sizeof(struct nvm_rq) + sizeof(struct pblk_c_ctx))
-
-#define pblk_err(pblk, fmt, ...)			\
-	pr_err("pblk %s: " fmt, pblk->disk->disk_name, ##__VA_ARGS__)
-#define pblk_info(pblk, fmt, ...)			\
-	pr_info("pblk %s: " fmt, pblk->disk->disk_name, ##__VA_ARGS__)
-#define pblk_warn(pblk, fmt, ...)			\
-	pr_warn("pblk %s: " fmt, pblk->disk->disk_name, ##__VA_ARGS__)
-#define pblk_debug(pblk, fmt, ...)			\
-	pr_debug("pblk %s: " fmt, pblk->disk->disk_name, ##__VA_ARGS__)
-
-/*
- * pblk ring buffer operations
- */
-int pblk_rb_init(struct pblk_rb *rb, unsigned int size, unsigned int threshold,
-		 unsigned int seg_sz);
-int pblk_rb_may_write_user(struct pblk_rb *rb, struct bio *bio,
-			   unsigned int nr_entries, unsigned int *pos);
-int pblk_rb_may_write_gc(struct pblk_rb *rb, unsigned int nr_entries,
-			 unsigned int *pos);
-void pblk_rb_write_entry_user(struct pblk_rb *rb, void *data,
-			      struct pblk_w_ctx w_ctx, unsigned int pos);
-void pblk_rb_write_entry_gc(struct pblk_rb *rb, void *data,
-			    struct pblk_w_ctx w_ctx, struct pblk_line *line,
-			    u64 paddr, unsigned int pos);
-struct pblk_w_ctx *pblk_rb_w_ctx(struct pblk_rb *rb, unsigned int pos);
-void pblk_rb_flush(struct pblk_rb *rb);
-
-void pblk_rb_sync_l2p(struct pblk_rb *rb);
-unsigned int pblk_rb_read_to_bio(struct pblk_rb *rb, struct nvm_rq *rqd,
-				 unsigned int pos, unsigned int nr_entries,
-				 unsigned int count);
-int pblk_rb_copy_to_bio(struct pblk_rb *rb, struct bio *bio, sector_t lba,
-			struct ppa_addr ppa);
-unsigned int pblk_rb_read_commit(struct pblk_rb *rb, unsigned int entries);
-
-unsigned int pblk_rb_sync_init(struct pblk_rb *rb, unsigned long *flags);
-unsigned int pblk_rb_sync_advance(struct pblk_rb *rb, unsigned int nr_entries);
-unsigned int pblk_rb_ptr_wrap(struct pblk_rb *rb, unsigned int p,
-			      unsigned int nr_entries);
-void pblk_rb_sync_end(struct pblk_rb *rb, unsigned long *flags);
-unsigned int pblk_rb_flush_point_count(struct pblk_rb *rb);
-
-unsigned int pblk_rb_read_count(struct pblk_rb *rb);
-unsigned int pblk_rb_sync_count(struct pblk_rb *rb);
-unsigned int pblk_rb_wrap_pos(struct pblk_rb *rb, unsigned int pos);
-
-int pblk_rb_tear_down_check(struct pblk_rb *rb);
-int pblk_rb_pos_oob(struct pblk_rb *rb, u64 pos);
-void pblk_rb_free(struct pblk_rb *rb);
-ssize_t pblk_rb_sysfs(struct pblk_rb *rb, char *buf);
-
-/*
- * pblk core
- */
-struct nvm_rq *pblk_alloc_rqd(struct pblk *pblk, int type);
-void pblk_free_rqd(struct pblk *pblk, struct nvm_rq *rqd, int type);
-int pblk_alloc_rqd_meta(struct pblk *pblk, struct nvm_rq *rqd);
-void pblk_free_rqd_meta(struct pblk *pblk, struct nvm_rq *rqd);
-void pblk_set_sec_per_write(struct pblk *pblk, int sec_per_write);
-int pblk_setup_w_rec_rq(struct pblk *pblk, struct nvm_rq *rqd,
-			struct pblk_c_ctx *c_ctx);
-void pblk_discard(struct pblk *pblk, struct bio *bio);
-struct nvm_chk_meta *pblk_get_chunk_meta(struct pblk *pblk);
-struct nvm_chk_meta *pblk_chunk_get_off(struct pblk *pblk,
-					      struct nvm_chk_meta *lp,
-					      struct ppa_addr ppa);
-void pblk_log_write_err(struct pblk *pblk, struct nvm_rq *rqd);
-void pblk_log_read_err(struct pblk *pblk, struct nvm_rq *rqd);
-int pblk_submit_io(struct pblk *pblk, struct nvm_rq *rqd, void *buf);
-int pblk_submit_io_sync(struct pblk *pblk, struct nvm_rq *rqd, void *buf);
-int pblk_submit_meta_io(struct pblk *pblk, struct pblk_line *meta_line);
-void pblk_check_chunk_state_update(struct pblk *pblk, struct nvm_rq *rqd);
-struct pblk_line *pblk_line_get(struct pblk *pblk);
-struct pblk_line *pblk_line_get_first_data(struct pblk *pblk);
-struct pblk_line *pblk_line_replace_data(struct pblk *pblk);
-void pblk_ppa_to_line_put(struct pblk *pblk, struct ppa_addr ppa);
-void pblk_rq_to_line_put(struct pblk *pblk, struct nvm_rq *rqd);
-int pblk_line_recov_alloc(struct pblk *pblk, struct pblk_line *line);
-void pblk_line_recov_close(struct pblk *pblk, struct pblk_line *line);
-struct pblk_line *pblk_line_get_data(struct pblk *pblk);
-struct pblk_line *pblk_line_get_erase(struct pblk *pblk);
-int pblk_line_erase(struct pblk *pblk, struct pblk_line *line);
-int pblk_line_is_full(struct pblk_line *line);
-void pblk_line_free(struct pblk_line *line);
-void pblk_line_close_meta(struct pblk *pblk, struct pblk_line *line);
-void pblk_line_close(struct pblk *pblk, struct pblk_line *line);
-void pblk_line_close_ws(struct work_struct *work);
-void pblk_pipeline_stop(struct pblk *pblk);
-void __pblk_pipeline_stop(struct pblk *pblk);
-void __pblk_pipeline_flush(struct pblk *pblk);
-void pblk_gen_run_ws(struct pblk *pblk, struct pblk_line *line, void *priv,
-		     void (*work)(struct work_struct *), gfp_t gfp_mask,
-		     struct workqueue_struct *wq);
-u64 pblk_line_smeta_start(struct pblk *pblk, struct pblk_line *line);
-int pblk_line_smeta_read(struct pblk *pblk, struct pblk_line *line);
-int pblk_line_emeta_read(struct pblk *pblk, struct pblk_line *line,
-			 void *emeta_buf);
-int pblk_blk_erase_async(struct pblk *pblk, struct ppa_addr erase_ppa);
-void pblk_line_put(struct kref *ref);
-void pblk_line_put_wq(struct kref *ref);
-struct list_head *pblk_line_gc_list(struct pblk *pblk, struct pblk_line *line);
-u64 pblk_lookup_page(struct pblk *pblk, struct pblk_line *line);
-void pblk_dealloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs);
-u64 pblk_alloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs);
-u64 __pblk_alloc_page(struct pblk *pblk, struct pblk_line *line, int nr_secs);
-int pblk_calc_secs(struct pblk *pblk, unsigned long secs_avail,
-		   unsigned long secs_to_flush, bool skip_meta);
-void pblk_down_rq(struct pblk *pblk, struct ppa_addr ppa,
-		  unsigned long *lun_bitmap);
-void pblk_down_chunk(struct pblk *pblk, struct ppa_addr ppa);
-void pblk_up_chunk(struct pblk *pblk, struct ppa_addr ppa);
-void pblk_up_rq(struct pblk *pblk, unsigned long *lun_bitmap);
-int pblk_bio_add_pages(struct pblk *pblk, struct bio *bio, gfp_t flags,
-		       int nr_pages);
-void pblk_bio_free_pages(struct pblk *pblk, struct bio *bio, int off,
-			 int nr_pages);
-void pblk_map_invalidate(struct pblk *pblk, struct ppa_addr ppa);
-void __pblk_map_invalidate(struct pblk *pblk, struct pblk_line *line,
-			   u64 paddr);
-void pblk_update_map(struct pblk *pblk, sector_t lba, struct ppa_addr ppa);
-void pblk_update_map_cache(struct pblk *pblk, sector_t lba,
-			   struct ppa_addr ppa);
-void pblk_update_map_dev(struct pblk *pblk, sector_t lba,
-			 struct ppa_addr ppa, struct ppa_addr entry_line);
-int pblk_update_map_gc(struct pblk *pblk, sector_t lba, struct ppa_addr ppa,
-		       struct pblk_line *gc_line, u64 paddr);
-void pblk_lookup_l2p_rand(struct pblk *pblk, struct ppa_addr *ppas,
-			  u64 *lba_list, int nr_secs);
-int pblk_lookup_l2p_seq(struct pblk *pblk, struct ppa_addr *ppas,
-			 sector_t blba, int nr_secs, bool *from_cache);
-void *pblk_get_meta_for_writes(struct pblk *pblk, struct nvm_rq *rqd);
-void pblk_get_packed_meta(struct pblk *pblk, struct nvm_rq *rqd);
-
-/*
- * pblk user I/O write path
- */
-void pblk_write_to_cache(struct pblk *pblk, struct bio *bio,
-			unsigned long flags);
-int pblk_write_gc_to_cache(struct pblk *pblk, struct pblk_gc_rq *gc_rq);
-
-/*
- * pblk map
- */
-int pblk_map_erase_rq(struct pblk *pblk, struct nvm_rq *rqd,
-		       unsigned int sentry, unsigned long *lun_bitmap,
-		       unsigned int valid_secs, struct ppa_addr *erase_ppa);
-int pblk_map_rq(struct pblk *pblk, struct nvm_rq *rqd, unsigned int sentry,
-		 unsigned long *lun_bitmap, unsigned int valid_secs,
-		 unsigned int off);
-
-/*
- * pblk write thread
- */
-int pblk_write_ts(void *data);
-void pblk_write_timer_fn(struct timer_list *t);
-void pblk_write_should_kick(struct pblk *pblk);
-void pblk_write_kick(struct pblk *pblk);
-
-/*
- * pblk read path
- */
-extern struct bio_set pblk_bio_set;
-void pblk_submit_read(struct pblk *pblk, struct bio *bio);
-int pblk_submit_read_gc(struct pblk *pblk, struct pblk_gc_rq *gc_rq);
-/*
- * pblk recovery
- */
-struct pblk_line *pblk_recov_l2p(struct pblk *pblk);
-int pblk_recov_pad(struct pblk *pblk);
-int pblk_recov_check_emeta(struct pblk *pblk, struct line_emeta *emeta);
-
-/*
- * pblk gc
- */
-#define PBLK_GC_MAX_READERS 8	/* Max number of outstanding GC reader jobs */
-#define PBLK_GC_RQ_QD 128	/* Queue depth for inflight GC requests */
-#define PBLK_GC_L_QD 4		/* Queue depth for inflight GC lines */
-
-int pblk_gc_init(struct pblk *pblk);
-void pblk_gc_exit(struct pblk *pblk, bool graceful);
-void pblk_gc_should_start(struct pblk *pblk);
-void pblk_gc_should_stop(struct pblk *pblk);
-void pblk_gc_should_kick(struct pblk *pblk);
-void pblk_gc_free_full_lines(struct pblk *pblk);
-void pblk_gc_sysfs_state_show(struct pblk *pblk, int *gc_enabled,
-			      int *gc_active);
-int pblk_gc_sysfs_force(struct pblk *pblk, int force);
-void pblk_put_line_back(struct pblk *pblk, struct pblk_line *line);
-
-/*
- * pblk rate limiter
- */
-void pblk_rl_init(struct pblk_rl *rl, int budget, int threshold);
-void pblk_rl_free(struct pblk_rl *rl);
-void pblk_rl_update_rates(struct pblk_rl *rl);
-int pblk_rl_high_thrs(struct pblk_rl *rl);
-unsigned long pblk_rl_nr_free_blks(struct pblk_rl *rl);
-unsigned long pblk_rl_nr_user_free_blks(struct pblk_rl *rl);
-int pblk_rl_user_may_insert(struct pblk_rl *rl, int nr_entries);
-void pblk_rl_inserted(struct pblk_rl *rl, int nr_entries);
-void pblk_rl_user_in(struct pblk_rl *rl, int nr_entries);
-int pblk_rl_gc_may_insert(struct pblk_rl *rl, int nr_entries);
-void pblk_rl_gc_in(struct pblk_rl *rl, int nr_entries);
-void pblk_rl_out(struct pblk_rl *rl, int nr_user, int nr_gc);
-int pblk_rl_max_io(struct pblk_rl *rl);
-void pblk_rl_free_lines_inc(struct pblk_rl *rl, struct pblk_line *line);
-void pblk_rl_free_lines_dec(struct pblk_rl *rl, struct pblk_line *line,
-			    bool used);
-int pblk_rl_is_limit(struct pblk_rl *rl);
-
-void pblk_rl_werr_line_in(struct pblk_rl *rl);
-void pblk_rl_werr_line_out(struct pblk_rl *rl);
-
-/*
- * pblk sysfs
- */
-int pblk_sysfs_init(struct gendisk *tdisk);
-void pblk_sysfs_exit(struct gendisk *tdisk);
-
-static inline struct nvm_rq *nvm_rq_from_c_ctx(void *c_ctx)
-{
-	return c_ctx - sizeof(struct nvm_rq);
-}
-
-static inline void *emeta_to_bb(struct line_emeta *emeta)
-{
-	return emeta->bb_bitmap;
-}
-
-static inline void *emeta_to_wa(struct pblk_line_meta *lm,
-				struct line_emeta *emeta)
-{
-	return emeta->bb_bitmap + lm->blk_bitmap_len;
-}
-
-static inline void *emeta_to_lbas(struct pblk *pblk, struct line_emeta *emeta)
-{
-	return ((void *)emeta + pblk->lm.emeta_len[1]);
-}
-
-static inline void *emeta_to_vsc(struct pblk *pblk, struct line_emeta *emeta)
-{
-	return (emeta_to_lbas(pblk, emeta) + pblk->lm.emeta_len[2]);
-}
-
-static inline int pblk_line_vsc(struct pblk_line *line)
-{
-	return le32_to_cpu(*line->vsc);
-}
-
-static inline int pblk_ppa_to_line_id(struct ppa_addr p)
-{
-	return p.a.blk;
-}
-
-static inline struct pblk_line *pblk_ppa_to_line(struct pblk *pblk,
-						 struct ppa_addr p)
-{
-	return &pblk->lines[pblk_ppa_to_line_id(p)];
-}
-
-static inline int pblk_ppa_to_pos(struct nvm_geo *geo, struct ppa_addr p)
-{
-	return p.a.lun * geo->num_ch + p.a.ch;
-}
-
-static inline struct ppa_addr addr_to_gen_ppa(struct pblk *pblk, u64 paddr,
-					      u64 line_id)
-{
-	struct nvm_tgt_dev *dev = pblk->dev;
-	struct nvm_geo *geo = &dev->geo;
-	struct ppa_addr ppa;
-
-	if (geo->version == NVM_OCSSD_SPEC_12) {
-		struct nvm_addrf_12 *ppaf = (struct nvm_addrf_12 *)&pblk->addrf;
-
-		ppa.ppa = 0;
-		ppa.g.blk = line_id;
-		ppa.g.pg = (paddr & ppaf->pg_mask) >> ppaf->pg_offset;
-		ppa.g.lun = (paddr & ppaf->lun_mask) >> ppaf->lun_offset;
-		ppa.g.ch = (paddr & ppaf->ch_mask) >> ppaf->ch_offset;
-		ppa.g.pl = (paddr & ppaf->pln_mask) >> ppaf->pln_offset;
-		ppa.g.sec = (paddr & ppaf->sec_mask) >> ppaf->sec_offset;
-	} else {
-		struct pblk_addrf *uaddrf = &pblk->uaddrf;
-		int secs, chnls, luns;
-
-		ppa.ppa = 0;
-
-		ppa.m.chk = line_id;
-
-		paddr = div_u64_rem(paddr, uaddrf->sec_stripe, &secs);
-		ppa.m.sec = secs;
-
-		paddr = div_u64_rem(paddr, uaddrf->ch_stripe, &chnls);
-		ppa.m.grp = chnls;
-
-		paddr = div_u64_rem(paddr, uaddrf->lun_stripe, &luns);
-		ppa.m.pu = luns;
-
-		ppa.m.sec += uaddrf->sec_stripe * paddr;
-	}
-
-	return ppa;
-}
-
-static inline struct nvm_chk_meta *pblk_dev_ppa_to_chunk(struct pblk *pblk,
-							struct ppa_addr p)
-{
-	struct nvm_tgt_dev *dev = pblk->dev;
-	struct nvm_geo *geo = &dev->geo;
-	struct pblk_line *line = pblk_ppa_to_line(pblk, p);
-	int pos = pblk_ppa_to_pos(geo, p);
-
-	return &line->chks[pos];
-}
-
-static inline u64 pblk_dev_ppa_to_chunk_addr(struct pblk *pblk,
-							struct ppa_addr p)
-{
-	struct nvm_tgt_dev *dev = pblk->dev;
-
-	return dev_to_chunk_addr(dev->parent, &pblk->addrf, p);
-}
-
-static inline u64 pblk_dev_ppa_to_line_addr(struct pblk *pblk,
-							struct ppa_addr p)
-{
-	struct nvm_tgt_dev *dev = pblk->dev;
-	struct nvm_geo *geo = &dev->geo;
-	u64 paddr;
-
-	if (geo->version == NVM_OCSSD_SPEC_12) {
-		struct nvm_addrf_12 *ppaf = (struct nvm_addrf_12 *)&pblk->addrf;
-
-		paddr = (u64)p.g.ch << ppaf->ch_offset;
-		paddr |= (u64)p.g.lun << ppaf->lun_offset;
-		paddr |= (u64)p.g.pg << ppaf->pg_offset;
-		paddr |= (u64)p.g.pl << ppaf->pln_offset;
-		paddr |= (u64)p.g.sec << ppaf->sec_offset;
-	} else {
-		struct pblk_addrf *uaddrf = &pblk->uaddrf;
-		u64 secs = p.m.sec;
-		int sec_stripe;
-
-		paddr = (u64)p.m.grp * uaddrf->sec_stripe;
-		paddr += (u64)p.m.pu * uaddrf->sec_lun_stripe;
-
-		secs = div_u64_rem(secs, uaddrf->sec_stripe, &sec_stripe);
-		paddr += secs * uaddrf->sec_ws_stripe;
-		paddr += sec_stripe;
-	}
-
-	return paddr;
-}
-
-static inline struct ppa_addr pblk_ppa32_to_ppa64(struct pblk *pblk, u32 ppa32)
-{
-	struct nvm_tgt_dev *dev = pblk->dev;
-
-	return nvm_ppa32_to_ppa64(dev->parent, &pblk->addrf, ppa32);
-}
-
-static inline u32 pblk_ppa64_to_ppa32(struct pblk *pblk, struct ppa_addr ppa64)
-{
-	struct nvm_tgt_dev *dev = pblk->dev;
-
-	return nvm_ppa64_to_ppa32(dev->parent, &pblk->addrf, ppa64);
-}
-
-static inline struct ppa_addr pblk_trans_map_get(struct pblk *pblk,
-								sector_t lba)
-{
-	struct ppa_addr ppa;
-
-	if (pblk->addrf_len < 32) {
-		u32 *map = (u32 *)pblk->trans_map;
-
-		ppa = pblk_ppa32_to_ppa64(pblk, map[lba]);
-	} else {
-		struct ppa_addr *map = (struct ppa_addr *)pblk->trans_map;
-
-		ppa = map[lba];
-	}
-
-	return ppa;
-}
-
-static inline void pblk_trans_map_set(struct pblk *pblk, sector_t lba,
-						struct ppa_addr ppa)
-{
-	if (pblk->addrf_len < 32) {
-		u32 *map = (u32 *)pblk->trans_map;
-
-		map[lba] = pblk_ppa64_to_ppa32(pblk, ppa);
-	} else {
-		u64 *map = (u64 *)pblk->trans_map;
-
-		map[lba] = ppa.ppa;
-	}
-}
-
-static inline int pblk_ppa_empty(struct ppa_addr ppa_addr)
-{
-	return (ppa_addr.ppa == ADDR_EMPTY);
-}
-
-static inline void pblk_ppa_set_empty(struct ppa_addr *ppa_addr)
-{
-	ppa_addr->ppa = ADDR_EMPTY;
-}
-
-static inline bool pblk_ppa_comp(struct ppa_addr lppa, struct ppa_addr rppa)
-{
-	return (lppa.ppa == rppa.ppa);
-}
-
-static inline int pblk_addr_in_cache(struct ppa_addr ppa)
-{
-	return (ppa.ppa != ADDR_EMPTY && ppa.c.is_cached);
-}
-
-static inline int pblk_addr_to_cacheline(struct ppa_addr ppa)
-{
-	return ppa.c.line;
-}
-
-static inline struct ppa_addr pblk_cacheline_to_addr(int addr)
-{
-	struct ppa_addr p;
-
-	p.c.line = addr;
-	p.c.is_cached = 1;
-
-	return p;
-}
-
-static inline u32 pblk_calc_meta_header_crc(struct pblk *pblk,
-					    struct line_header *header)
-{
-	u32 crc = ~(u32)0;
-
-	crc = crc32_le(crc, (unsigned char *)header + sizeof(crc),
-				sizeof(struct line_header) - sizeof(crc));
-
-	return crc;
-}
-
-static inline u32 pblk_calc_smeta_crc(struct pblk *pblk,
-				      struct line_smeta *smeta)
-{
-	struct pblk_line_meta *lm = &pblk->lm;
-	u32 crc = ~(u32)0;
-
-	crc = crc32_le(crc, (unsigned char *)smeta +
-				sizeof(struct line_header) + sizeof(crc),
-				lm->smeta_len -
-				sizeof(struct line_header) - sizeof(crc));
-
-	return crc;
-}
-
-static inline u32 pblk_calc_emeta_crc(struct pblk *pblk,
-				      struct line_emeta *emeta)
-{
-	struct pblk_line_meta *lm = &pblk->lm;
-	u32 crc = ~(u32)0;
-
-	crc = crc32_le(crc, (unsigned char *)emeta +
-				sizeof(struct line_header) + sizeof(crc),
-				lm->emeta_len[0] -
-				sizeof(struct line_header) - sizeof(crc));
-
-	return crc;
-}
-
-static inline int pblk_io_aligned(struct pblk *pblk, int nr_secs)
-{
-	return !(nr_secs % pblk->min_write_pgs);
-}
-
-#ifdef CONFIG_NVM_PBLK_DEBUG
-static inline void print_ppa(struct pblk *pblk, struct ppa_addr *p,
-			     char *msg, int error)
-{
-	struct nvm_geo *geo = &pblk->dev->geo;
-
-	if (p->c.is_cached) {
-		pblk_err(pblk, "ppa: (%s: %x) cache line: %llu\n",
-				msg, error, (u64)p->c.line);
-	} else if (geo->version == NVM_OCSSD_SPEC_12) {
-		pblk_err(pblk, "ppa: (%s: %x):ch:%d,lun:%d,blk:%d,pg:%d,pl:%d,sec:%d\n",
-			msg, error,
-			p->g.ch, p->g.lun, p->g.blk,
-			p->g.pg, p->g.pl, p->g.sec);
-	} else {
-		pblk_err(pblk, "ppa: (%s: %x):ch:%d,lun:%d,chk:%d,sec:%d\n",
-			msg, error,
-			p->m.grp, p->m.pu, p->m.chk, p->m.sec);
-	}
-}
-
-static inline void pblk_print_failed_rqd(struct pblk *pblk, struct nvm_rq *rqd,
-					 int error)
-{
-	int bit = -1;
-
-	if (rqd->nr_ppas ==  1) {
-		print_ppa(pblk, &rqd->ppa_addr, "rqd", error);
-		return;
-	}
-
-	while ((bit = find_next_bit((void *)&rqd->ppa_status, rqd->nr_ppas,
-						bit + 1)) < rqd->nr_ppas) {
-		print_ppa(pblk, &rqd->ppa_list[bit], "rqd", error);
-	}
-
-	pblk_err(pblk, "error:%d, ppa_status:%llx\n", error, rqd->ppa_status);
-}
-
-static inline int pblk_boundary_ppa_checks(struct nvm_tgt_dev *tgt_dev,
-				       struct ppa_addr *ppas, int nr_ppas)
-{
-	struct nvm_geo *geo = &tgt_dev->geo;
-	struct ppa_addr *ppa;
-	int i;
-
-	for (i = 0; i < nr_ppas; i++) {
-		ppa = &ppas[i];
-
-		if (geo->version == NVM_OCSSD_SPEC_12) {
-			if (!ppa->c.is_cached &&
-					ppa->g.ch < geo->num_ch &&
-					ppa->g.lun < geo->num_lun &&
-					ppa->g.pl < geo->num_pln &&
-					ppa->g.blk < geo->num_chk &&
-					ppa->g.pg < geo->num_pg &&
-					ppa->g.sec < geo->ws_min)
-				continue;
-		} else {
-			if (!ppa->c.is_cached &&
-					ppa->m.grp < geo->num_ch &&
-					ppa->m.pu < geo->num_lun &&
-					ppa->m.chk < geo->num_chk &&
-					ppa->m.sec < geo->clba)
-				continue;
-		}
-
-		print_ppa(tgt_dev->q->queuedata, ppa, "boundary", i);
-
-		return 1;
-	}
-	return 0;
-}
-
-static inline int pblk_check_io(struct pblk *pblk, struct nvm_rq *rqd)
-{
-	struct nvm_tgt_dev *dev = pblk->dev;
-	struct ppa_addr *ppa_list = nvm_rq_to_ppa_list(rqd);
-
-	if (pblk_boundary_ppa_checks(dev, ppa_list, rqd->nr_ppas)) {
-		WARN_ON(1);
-		return -EINVAL;
-	}
-
-	if (rqd->opcode == NVM_OP_PWRITE) {
-		struct pblk_line *line;
-		int i;
-
-		for (i = 0; i < rqd->nr_ppas; i++) {
-			line = pblk_ppa_to_line(pblk, ppa_list[i]);
-
-			spin_lock(&line->lock);
-			if (line->state != PBLK_LINESTATE_OPEN) {
-				pblk_err(pblk, "bad ppa: line:%d,state:%d\n",
-							line->id, line->state);
-				WARN_ON(1);
-				spin_unlock(&line->lock);
-				return -EINVAL;
-			}
-			spin_unlock(&line->lock);
-		}
-	}
-
-	return 0;
-}
-#endif
-
-static inline int pblk_boundary_paddr_checks(struct pblk *pblk, u64 paddr)
-{
-	struct pblk_line_meta *lm = &pblk->lm;
-
-	if (paddr > lm->sec_per_line)
-		return 1;
-
-	return 0;
-}
-
-static inline unsigned int pblk_get_bi_idx(struct bio *bio)
-{
-	return bio->bi_iter.bi_idx;
-}
-
-static inline sector_t pblk_get_lba(struct bio *bio)
-{
-	return bio->bi_iter.bi_sector / NR_PHY_IN_LOG;
-}
-
-static inline unsigned int pblk_get_secs(struct bio *bio)
-{
-	return  bio->bi_iter.bi_size / PBLK_EXPOSED_PAGE_SIZE;
-}
-
-static inline char *pblk_disk_name(struct pblk *pblk)
-{
-	struct gendisk *disk = pblk->disk;
-
-	return disk->disk_name;
-}
-
-static inline unsigned int pblk_get_min_chks(struct pblk *pblk)
-{
-	struct pblk_line_meta *lm = &pblk->lm;
-	/* In a worst-case scenario every line will have OP invalid sectors.
-	 * We will then need a minimum of 1/OP lines to free up a single line
-	 */
-
-	return DIV_ROUND_UP(100, pblk->op) * lm->blk_per_line;
-}
-
-static inline struct pblk_sec_meta *pblk_get_meta(struct pblk *pblk,
-							 void *meta, int index)
-{
-	return meta +
-	       max_t(int, sizeof(struct pblk_sec_meta), pblk->oob_meta_size)
-	       * index;
-}
-
-static inline int pblk_dma_meta_size(struct pblk *pblk)
-{
-	return max_t(int, sizeof(struct pblk_sec_meta), pblk->oob_meta_size)
-	       * NVM_MAX_VLBA;
-}
-
-static inline int pblk_is_oob_meta_supported(struct pblk *pblk)
-{
-	return pblk->oob_meta_size >= sizeof(struct pblk_sec_meta);
-}
-#endif /* PBLK_H_ */
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index 3c44c4bb40fc..19598bd38939 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -1329,6 +1329,7 @@ static void raid1_write_request(struct mddev *mddev, struct bio *bio,
 	struct raid1_plug_cb *plug = NULL;
 	int first_clone;
 	int max_sectors;
+	bool write_behind = false;
 
 	if (mddev_is_clustered(mddev) &&
 	     md_cluster_ops->area_resyncing(mddev, WRITE,
@@ -1381,6 +1382,15 @@ static void raid1_write_request(struct mddev *mddev, struct bio *bio,
 	max_sectors = r1_bio->sectors;
 	for (i = 0;  i < disks; i++) {
 		struct md_rdev *rdev = rcu_dereference(conf->mirrors[i].rdev);
+
+		/*
+		 * The write-behind io is only attempted on drives marked as
+		 * write-mostly, which means we could allocate write behind
+		 * bio later.
+		 */
+		if (rdev && test_bit(WriteMostly, &rdev->flags))
+			write_behind = true;
+
 		if (rdev && unlikely(test_bit(Blocked, &rdev->flags))) {
 			atomic_inc(&rdev->nr_pending);
 			blocked_rdev = rdev;
@@ -1454,6 +1464,15 @@ static void raid1_write_request(struct mddev *mddev, struct bio *bio,
 		goto retry_write;
 	}
 
+	/*
+	 * When using a bitmap, we may call alloc_behind_master_bio below.
+	 * alloc_behind_master_bio allocates a copy of the data payload a page
+	 * at a time and thus needs a new bio that can fit the whole payload
+	 * this bio in page sized chunks.
+	 */
+	if (write_behind && bitmap)
+		max_sectors = min_t(int, max_sectors,
+				    BIO_MAX_VECS * (PAGE_SIZE >> 9));
 	if (max_sectors < bio_sectors(bio)) {
 		struct bio *split = bio_split(bio, max_sectors,
 					      GFP_NOIO, &conf->bio_split);
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index 07119d7e0fdf..aa2636582841 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -1712,6 +1712,11 @@ retry_discard:
 	} else
 		r10_bio->master_bio = (struct bio *)first_r10bio;
 
+	/*
+	 * first select target devices under rcu_lock and
+	 * inc refcount on their rdev.  Record them by setting
+	 * bios[x] to bio
+	 */
 	rcu_read_lock();
 	for (disk = 0; disk < geo->raid_disks; disk++) {
 		struct md_rdev *rdev = rcu_dereference(conf->mirrors[disk].rdev);
@@ -1743,9 +1748,6 @@ retry_discard:
 	for (disk = 0; disk < geo->raid_disks; disk++) {
 		sector_t dev_start, dev_end;
 		struct bio *mbio, *rbio = NULL;
-		struct md_rdev *rdev = rcu_dereference(conf->mirrors[disk].rdev);
-		struct md_rdev *rrdev = rcu_dereference(
-			conf->mirrors[disk].replacement);
 
 		/*
 		 * Now start to calculate the start and end address for each disk.
@@ -1775,9 +1777,12 @@ retry_discard:
 
 		/*
 		 * It only handles discard bio which size is >= stripe size, so
-		 * dev_end > dev_start all the time
+		 * dev_end > dev_start all the time.
+		 * It doesn't need to use rcu lock to get rdev here. We already
+		 * add rdev->nr_pending in the first loop.
 		 */
 		if (r10_bio->devs[disk].bio) {
+			struct md_rdev *rdev = conf->mirrors[disk].rdev;
 			mbio = bio_clone_fast(bio, GFP_NOIO, &mddev->bio_set);
 			mbio->bi_end_io = raid10_end_discard_request;
 			mbio->bi_private = r10_bio;
@@ -1790,6 +1795,7 @@ retry_discard:
 			bio_endio(mbio);
 		}
 		if (r10_bio->devs[disk].repl_bio) {
+			struct md_rdev *rrdev = conf->mirrors[disk].replacement;
 			rbio = bio_clone_fast(bio, GFP_NOIO, &mddev->bio_set);
 			rbio->bi_end_io = raid10_end_discard_request;
 			rbio->bi_private = r10_bio;
diff --git a/drivers/nvme/host/Kconfig b/drivers/nvme/host/Kconfig
index c3f3d77f1aac..dc0450ca23a3 100644
--- a/drivers/nvme/host/Kconfig
+++ b/drivers/nvme/host/Kconfig
@@ -33,12 +33,12 @@ config NVME_HWMON
 	  in the system.
 
 config NVME_FABRICS
+	select NVME_CORE
 	tristate
 
 config NVME_RDMA
 	tristate "NVM Express over Fabrics RDMA host driver"
 	depends on INFINIBAND && INFINIBAND_ADDR_TRANS && BLOCK
-	select NVME_CORE
 	select NVME_FABRICS
 	select SG_POOL
 	help
@@ -55,7 +55,6 @@ config NVME_FC
 	tristate "NVM Express over Fabrics FC host driver"
 	depends on BLOCK
 	depends on HAS_DMA
-	select NVME_CORE
 	select NVME_FABRICS
 	select SG_POOL
 	help
@@ -72,7 +71,6 @@ config NVME_TCP
 	tristate "NVM Express over Fabrics TCP host driver"
 	depends on INET
 	depends on BLOCK
-	select NVME_CORE
 	select NVME_FABRICS
 	select CRYPTO
 	select CRYPTO_CRC32C
diff --git a/drivers/nvme/host/Makefile b/drivers/nvme/host/Makefile
index cbc509784b2e..dfaacd472e5d 100644
--- a/drivers/nvme/host/Makefile
+++ b/drivers/nvme/host/Makefile
@@ -12,7 +12,6 @@ obj-$(CONFIG_NVME_TCP)			+= nvme-tcp.o
 nvme-core-y				:= core.o ioctl.o
 nvme-core-$(CONFIG_TRACING)		+= trace.o
 nvme-core-$(CONFIG_NVME_MULTIPATH)	+= multipath.o
-nvme-core-$(CONFIG_NVM)			+= lightnvm.o
 nvme-core-$(CONFIG_BLK_DEV_ZONED)	+= zns.o
 nvme-core-$(CONFIG_FAULT_INJECTION_DEBUG_FS)	+= fault_inject.o
 nvme-core-$(CONFIG_NVME_HWMON)		+= hwmon.o
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 68acd33c3856..8679a108f571 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -587,9 +587,6 @@ static void nvme_free_ns(struct kref *kref)
 {
 	struct nvme_ns *ns = container_of(kref, struct nvme_ns, kref);
 
-	if (ns->ndev)
-		nvme_nvm_unregister(ns);
-
 	put_disk(ns->disk);
 	nvme_put_ns_head(ns->head);
 	nvme_put_ctrl(ns->ctrl);
@@ -1028,7 +1025,8 @@ blk_status_t nvme_setup_cmd(struct nvme_ns *ns, struct request *req)
 		return BLK_STS_IOERR;
 	}
 
-	cmd->common.command_id = req->tag;
+	nvme_req(req)->genctr++;
+	cmd->common.command_id = nvme_cid(req);
 	trace_nvme_setup_cmd(req, cmd);
 	return ret;
 }
@@ -3217,9 +3215,6 @@ static const struct attribute_group nvme_ns_id_attr_group = {
 
 const struct attribute_group *nvme_ns_id_attr_groups[] = {
 	&nvme_ns_id_attr_group,
-#ifdef CONFIG_NVM
-	&nvme_nvm_attr_group,
-#endif
 	NULL,
 };
 
@@ -3762,13 +3757,6 @@ static void nvme_alloc_ns(struct nvme_ctrl *ctrl, unsigned nsid,
 	if (nvme_update_ns_info(ns, id))
 		goto out_unlink_ns;
 
-	if ((ctrl->quirks & NVME_QUIRK_LIGHTNVM) && id->vs[0] == 0x1) {
-		if (nvme_nvm_register(ns, disk->disk_name, node)) {
-			dev_warn(ctrl->device, "LightNVM init failure\n");
-			goto out_unlink_ns;
-		}
-	}
-
 	down_write(&ctrl->namespaces_rwsem);
 	list_add_tail(&ns->list, &ctrl->namespaces);
 	up_write(&ctrl->namespaces_rwsem);
diff --git a/drivers/nvme/host/fabrics.c b/drivers/nvme/host/fabrics.c
index a5469fd9d4c3..668c6bb7a567 100644
--- a/drivers/nvme/host/fabrics.c
+++ b/drivers/nvme/host/fabrics.c
@@ -719,7 +719,6 @@ static int nvmf_parse_options(struct nvmf_ctrl_options *opts,
 				ret = -EINVAL;
 				goto out;
 			}
-			nvmf_host_put(opts->host);
 			opts->host = nvmf_host_add(p);
 			kfree(p);
 			if (!opts->host) {
diff --git a/drivers/nvme/host/ioctl.c b/drivers/nvme/host/ioctl.c
index 305ddd415e45..22314962842d 100644
--- a/drivers/nvme/host/ioctl.c
+++ b/drivers/nvme/host/ioctl.c
@@ -342,9 +342,7 @@ static int nvme_ns_ioctl(struct nvme_ns *ns, unsigned int cmd,
 	case NVME_IOCTL_IO64_CMD:
 		return nvme_user_cmd64(ns->ctrl, ns, argp);
 	default:
-		if (!ns->ndev)
-			return -ENOTTY;
-		return nvme_nvm_ioctl(ns, cmd, argp);
+		return -ENOTTY;
 	}
 }
 
diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c
deleted file mode 100644
index e9d9ad47f70f..000000000000
--- a/drivers/nvme/host/lightnvm.c
+++ /dev/null
@@ -1,1274 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * nvme-lightnvm.c - LightNVM NVMe device
- *
- * Copyright (C) 2014-2015 IT University of Copenhagen
- * Initial release: Matias Bjorling <mb@lightnvm.io>
- */
-
-#include "nvme.h"
-
-#include <linux/nvme.h>
-#include <linux/bitops.h>
-#include <linux/lightnvm.h>
-#include <linux/vmalloc.h>
-#include <linux/sched/sysctl.h>
-#include <uapi/linux/lightnvm.h>
-
-enum nvme_nvm_admin_opcode {
-	nvme_nvm_admin_identity		= 0xe2,
-	nvme_nvm_admin_get_bb_tbl	= 0xf2,
-	nvme_nvm_admin_set_bb_tbl	= 0xf1,
-};
-
-enum nvme_nvm_log_page {
-	NVME_NVM_LOG_REPORT_CHUNK	= 0xca,
-};
-
-struct nvme_nvm_ph_rw {
-	__u8			opcode;
-	__u8			flags;
-	__u16			command_id;
-	__le32			nsid;
-	__u64			rsvd2;
-	__le64			metadata;
-	__le64			prp1;
-	__le64			prp2;
-	__le64			spba;
-	__le16			length;
-	__le16			control;
-	__le32			dsmgmt;
-	__le64			resv;
-};
-
-struct nvme_nvm_erase_blk {
-	__u8			opcode;
-	__u8			flags;
-	__u16			command_id;
-	__le32			nsid;
-	__u64			rsvd[2];
-	__le64			prp1;
-	__le64			prp2;
-	__le64			spba;
-	__le16			length;
-	__le16			control;
-	__le32			dsmgmt;
-	__le64			resv;
-};
-
-struct nvme_nvm_identity {
-	__u8			opcode;
-	__u8			flags;
-	__u16			command_id;
-	__le32			nsid;
-	__u64			rsvd[2];
-	__le64			prp1;
-	__le64			prp2;
-	__u32			rsvd11[6];
-};
-
-struct nvme_nvm_getbbtbl {
-	__u8			opcode;
-	__u8			flags;
-	__u16			command_id;
-	__le32			nsid;
-	__u64			rsvd[2];
-	__le64			prp1;
-	__le64			prp2;
-	__le64			spba;
-	__u32			rsvd4[4];
-};
-
-struct nvme_nvm_setbbtbl {
-	__u8			opcode;
-	__u8			flags;
-	__u16			command_id;
-	__le32			nsid;
-	__le64			rsvd[2];
-	__le64			prp1;
-	__le64			prp2;
-	__le64			spba;
-	__le16			nlb;
-	__u8			value;
-	__u8			rsvd3;
-	__u32			rsvd4[3];
-};
-
-struct nvme_nvm_command {
-	union {
-		struct nvme_common_command common;
-		struct nvme_nvm_ph_rw ph_rw;
-		struct nvme_nvm_erase_blk erase;
-		struct nvme_nvm_identity identity;
-		struct nvme_nvm_getbbtbl get_bb;
-		struct nvme_nvm_setbbtbl set_bb;
-	};
-};
-
-struct nvme_nvm_id12_grp {
-	__u8			mtype;
-	__u8			fmtype;
-	__le16			res16;
-	__u8			num_ch;
-	__u8			num_lun;
-	__u8			num_pln;
-	__u8			rsvd1;
-	__le16			num_chk;
-	__le16			num_pg;
-	__le16			fpg_sz;
-	__le16			csecs;
-	__le16			sos;
-	__le16			rsvd2;
-	__le32			trdt;
-	__le32			trdm;
-	__le32			tprt;
-	__le32			tprm;
-	__le32			tbet;
-	__le32			tbem;
-	__le32			mpos;
-	__le32			mccap;
-	__le16			cpar;
-	__u8			reserved[906];
-} __packed;
-
-struct nvme_nvm_id12_addrf {
-	__u8			ch_offset;
-	__u8			ch_len;
-	__u8			lun_offset;
-	__u8			lun_len;
-	__u8			pln_offset;
-	__u8			pln_len;
-	__u8			blk_offset;
-	__u8			blk_len;
-	__u8			pg_offset;
-	__u8			pg_len;
-	__u8			sec_offset;
-	__u8			sec_len;
-	__u8			res[4];
-} __packed;
-
-struct nvme_nvm_id12 {
-	__u8			ver_id;
-	__u8			vmnt;
-	__u8			cgrps;
-	__u8			res;
-	__le32			cap;
-	__le32			dom;
-	struct nvme_nvm_id12_addrf ppaf;
-	__u8			resv[228];
-	struct nvme_nvm_id12_grp grp;
-	__u8			resv2[2880];
-} __packed;
-
-struct nvme_nvm_bb_tbl {
-	__u8	tblid[4];
-	__le16	verid;
-	__le16	revid;
-	__le32	rvsd1;
-	__le32	tblks;
-	__le32	tfact;
-	__le32	tgrown;
-	__le32	tdresv;
-	__le32	thresv;
-	__le32	rsvd2[8];
-	__u8	blk[];
-};
-
-struct nvme_nvm_id20_addrf {
-	__u8			grp_len;
-	__u8			pu_len;
-	__u8			chk_len;
-	__u8			lba_len;
-	__u8			resv[4];
-};
-
-struct nvme_nvm_id20 {
-	__u8			mjr;
-	__u8			mnr;
-	__u8			resv[6];
-
-	struct nvme_nvm_id20_addrf lbaf;
-
-	__le32			mccap;
-	__u8			resv2[12];
-
-	__u8			wit;
-	__u8			resv3[31];
-
-	/* Geometry */
-	__le16			num_grp;
-	__le16			num_pu;
-	__le32			num_chk;
-	__le32			clba;
-	__u8			resv4[52];
-
-	/* Write data requirements */
-	__le32			ws_min;
-	__le32			ws_opt;
-	__le32			mw_cunits;
-	__le32			maxoc;
-	__le32			maxocpu;
-	__u8			resv5[44];
-
-	/* Performance related metrics */
-	__le32			trdt;
-	__le32			trdm;
-	__le32			twrt;
-	__le32			twrm;
-	__le32			tcrst;
-	__le32			tcrsm;
-	__u8			resv6[40];
-
-	/* Reserved area */
-	__u8			resv7[2816];
-
-	/* Vendor specific */
-	__u8			vs[1024];
-};
-
-struct nvme_nvm_chk_meta {
-	__u8	state;
-	__u8	type;
-	__u8	wi;
-	__u8	rsvd[5];
-	__le64	slba;
-	__le64	cnlb;
-	__le64	wp;
-};
-
-/*
- * Check we didn't inadvertently grow the command struct
- */
-static inline void _nvme_nvm_check_size(void)
-{
-	BUILD_BUG_ON(sizeof(struct nvme_nvm_identity) != 64);
-	BUILD_BUG_ON(sizeof(struct nvme_nvm_ph_rw) != 64);
-	BUILD_BUG_ON(sizeof(struct nvme_nvm_erase_blk) != 64);
-	BUILD_BUG_ON(sizeof(struct nvme_nvm_getbbtbl) != 64);
-	BUILD_BUG_ON(sizeof(struct nvme_nvm_setbbtbl) != 64);
-	BUILD_BUG_ON(sizeof(struct nvme_nvm_id12_grp) != 960);
-	BUILD_BUG_ON(sizeof(struct nvme_nvm_id12_addrf) != 16);
-	BUILD_BUG_ON(sizeof(struct nvme_nvm_id12) != NVME_IDENTIFY_DATA_SIZE);
-	BUILD_BUG_ON(sizeof(struct nvme_nvm_bb_tbl) != 64);
-	BUILD_BUG_ON(sizeof(struct nvme_nvm_id20_addrf) != 8);
-	BUILD_BUG_ON(sizeof(struct nvme_nvm_id20) != NVME_IDENTIFY_DATA_SIZE);
-	BUILD_BUG_ON(sizeof(struct nvme_nvm_chk_meta) != 32);
-	BUILD_BUG_ON(sizeof(struct nvme_nvm_chk_meta) !=
-						sizeof(struct nvm_chk_meta));
-}
-
-static void nvme_nvm_set_addr_12(struct nvm_addrf_12 *dst,
-				 struct nvme_nvm_id12_addrf *src)
-{
-	dst->ch_len = src->ch_len;
-	dst->lun_len = src->lun_len;
-	dst->blk_len = src->blk_len;
-	dst->pg_len = src->pg_len;
-	dst->pln_len = src->pln_len;
-	dst->sec_len = src->sec_len;
-
-	dst->ch_offset = src->ch_offset;
-	dst->lun_offset = src->lun_offset;
-	dst->blk_offset = src->blk_offset;
-	dst->pg_offset = src->pg_offset;
-	dst->pln_offset = src->pln_offset;
-	dst->sec_offset = src->sec_offset;
-
-	dst->ch_mask = ((1ULL << dst->ch_len) - 1) << dst->ch_offset;
-	dst->lun_mask = ((1ULL << dst->lun_len) - 1) << dst->lun_offset;
-	dst->blk_mask = ((1ULL << dst->blk_len) - 1) << dst->blk_offset;
-	dst->pg_mask = ((1ULL << dst->pg_len) - 1) << dst->pg_offset;
-	dst->pln_mask = ((1ULL << dst->pln_len) - 1) << dst->pln_offset;
-	dst->sec_mask = ((1ULL << dst->sec_len) - 1) << dst->sec_offset;
-}
-
-static int nvme_nvm_setup_12(struct nvme_nvm_id12 *id,
-			     struct nvm_geo *geo)
-{
-	struct nvme_nvm_id12_grp *src;
-	int sec_per_pg, sec_per_pl, pg_per_blk;
-
-	if (id->cgrps != 1)
-		return -EINVAL;
-
-	src = &id->grp;
-
-	if (src->mtype != 0) {
-		pr_err("nvm: memory type not supported\n");
-		return -EINVAL;
-	}
-
-	/* 1.2 spec. only reports a single version id - unfold */
-	geo->major_ver_id = id->ver_id;
-	geo->minor_ver_id = 2;
-
-	/* Set compacted version for upper layers */
-	geo->version = NVM_OCSSD_SPEC_12;
-
-	geo->num_ch = src->num_ch;
-	geo->num_lun = src->num_lun;
-	geo->all_luns = geo->num_ch * geo->num_lun;
-
-	geo->num_chk = le16_to_cpu(src->num_chk);
-
-	geo->csecs = le16_to_cpu(src->csecs);
-	geo->sos = le16_to_cpu(src->sos);
-
-	pg_per_blk = le16_to_cpu(src->num_pg);
-	sec_per_pg = le16_to_cpu(src->fpg_sz) / geo->csecs;
-	sec_per_pl = sec_per_pg * src->num_pln;
-	geo->clba = sec_per_pl * pg_per_blk;
-
-	geo->all_chunks = geo->all_luns * geo->num_chk;
-	geo->total_secs = geo->clba * geo->all_chunks;
-
-	geo->ws_min = sec_per_pg;
-	geo->ws_opt = sec_per_pg;
-	geo->mw_cunits = geo->ws_opt << 3;	/* default to MLC safe values */
-
-	/* Do not impose values for maximum number of open blocks as it is
-	 * unspecified in 1.2. Users of 1.2 must be aware of this and eventually
-	 * specify these values through a quirk if restrictions apply.
-	 */
-	geo->maxoc = geo->all_luns * geo->num_chk;
-	geo->maxocpu = geo->num_chk;
-
-	geo->mccap = le32_to_cpu(src->mccap);
-
-	geo->trdt = le32_to_cpu(src->trdt);
-	geo->trdm = le32_to_cpu(src->trdm);
-	geo->tprt = le32_to_cpu(src->tprt);
-	geo->tprm = le32_to_cpu(src->tprm);
-	geo->tbet = le32_to_cpu(src->tbet);
-	geo->tbem = le32_to_cpu(src->tbem);
-
-	/* 1.2 compatibility */
-	geo->vmnt = id->vmnt;
-	geo->cap = le32_to_cpu(id->cap);
-	geo->dom = le32_to_cpu(id->dom);
-
-	geo->mtype = src->mtype;
-	geo->fmtype = src->fmtype;
-
-	geo->cpar = le16_to_cpu(src->cpar);
-	geo->mpos = le32_to_cpu(src->mpos);
-
-	geo->pln_mode = NVM_PLANE_SINGLE;
-
-	if (geo->mpos & 0x020202) {
-		geo->pln_mode = NVM_PLANE_DOUBLE;
-		geo->ws_opt <<= 1;
-	} else if (geo->mpos & 0x040404) {
-		geo->pln_mode = NVM_PLANE_QUAD;
-		geo->ws_opt <<= 2;
-	}
-
-	geo->num_pln = src->num_pln;
-	geo->num_pg = le16_to_cpu(src->num_pg);
-	geo->fpg_sz = le16_to_cpu(src->fpg_sz);
-
-	nvme_nvm_set_addr_12((struct nvm_addrf_12 *)&geo->addrf, &id->ppaf);
-
-	return 0;
-}
-
-static void nvme_nvm_set_addr_20(struct nvm_addrf *dst,
-				 struct nvme_nvm_id20_addrf *src)
-{
-	dst->ch_len = src->grp_len;
-	dst->lun_len = src->pu_len;
-	dst->chk_len = src->chk_len;
-	dst->sec_len = src->lba_len;
-
-	dst->sec_offset = 0;
-	dst->chk_offset = dst->sec_len;
-	dst->lun_offset = dst->chk_offset + dst->chk_len;
-	dst->ch_offset = dst->lun_offset + dst->lun_len;
-
-	dst->ch_mask = ((1ULL << dst->ch_len) - 1) << dst->ch_offset;
-	dst->lun_mask = ((1ULL << dst->lun_len) - 1) << dst->lun_offset;
-	dst->chk_mask = ((1ULL << dst->chk_len) - 1) << dst->chk_offset;
-	dst->sec_mask = ((1ULL << dst->sec_len) - 1) << dst->sec_offset;
-}
-
-static int nvme_nvm_setup_20(struct nvme_nvm_id20 *id,
-			     struct nvm_geo *geo)
-{
-	geo->major_ver_id = id->mjr;
-	geo->minor_ver_id = id->mnr;
-
-	/* Set compacted version for upper layers */
-	geo->version = NVM_OCSSD_SPEC_20;
-
-	geo->num_ch = le16_to_cpu(id->num_grp);
-	geo->num_lun = le16_to_cpu(id->num_pu);
-	geo->all_luns = geo->num_ch * geo->num_lun;
-
-	geo->num_chk = le32_to_cpu(id->num_chk);
-	geo->clba = le32_to_cpu(id->clba);
-
-	geo->all_chunks = geo->all_luns * geo->num_chk;
-	geo->total_secs = geo->clba * geo->all_chunks;
-
-	geo->ws_min = le32_to_cpu(id->ws_min);
-	geo->ws_opt = le32_to_cpu(id->ws_opt);
-	geo->mw_cunits = le32_to_cpu(id->mw_cunits);
-	geo->maxoc = le32_to_cpu(id->maxoc);
-	geo->maxocpu = le32_to_cpu(id->maxocpu);
-
-	geo->trdt = le32_to_cpu(id->trdt);
-	geo->trdm = le32_to_cpu(id->trdm);
-	geo->tprt = le32_to_cpu(id->twrt);
-	geo->tprm = le32_to_cpu(id->twrm);
-	geo->tbet = le32_to_cpu(id->tcrst);
-	geo->tbem = le32_to_cpu(id->tcrsm);
-
-	nvme_nvm_set_addr_20(&geo->addrf, &id->lbaf);
-
-	return 0;
-}
-
-static int nvme_nvm_identity(struct nvm_dev *nvmdev)
-{
-	struct nvme_ns *ns = nvmdev->q->queuedata;
-	struct nvme_nvm_id12 *id;
-	struct nvme_nvm_command c = {};
-	int ret;
-
-	c.identity.opcode = nvme_nvm_admin_identity;
-	c.identity.nsid = cpu_to_le32(ns->head->ns_id);
-
-	id = kmalloc(sizeof(struct nvme_nvm_id12), GFP_KERNEL);
-	if (!id)
-		return -ENOMEM;
-
-	ret = nvme_submit_sync_cmd(ns->ctrl->admin_q, (struct nvme_command *)&c,
-				id, sizeof(struct nvme_nvm_id12));
-	if (ret) {
-		ret = -EIO;
-		goto out;
-	}
-
-	/*
-	 * The 1.2 and 2.0 specifications share the first byte in their geometry
-	 * command to make it possible to know what version a device implements.
-	 */
-	switch (id->ver_id) {
-	case 1:
-		ret = nvme_nvm_setup_12(id, &nvmdev->geo);
-		break;
-	case 2:
-		ret = nvme_nvm_setup_20((struct nvme_nvm_id20 *)id,
-							&nvmdev->geo);
-		break;
-	default:
-		dev_err(ns->ctrl->device, "OCSSD revision not supported (%d)\n",
-							id->ver_id);
-		ret = -EINVAL;
-	}
-
-out:
-	kfree(id);
-	return ret;
-}
-
-static int nvme_nvm_get_bb_tbl(struct nvm_dev *nvmdev, struct ppa_addr ppa,
-								u8 *blks)
-{
-	struct request_queue *q = nvmdev->q;
-	struct nvm_geo *geo = &nvmdev->geo;
-	struct nvme_ns *ns = q->queuedata;
-	struct nvme_ctrl *ctrl = ns->ctrl;
-	struct nvme_nvm_command c = {};
-	struct nvme_nvm_bb_tbl *bb_tbl;
-	int nr_blks = geo->num_chk * geo->num_pln;
-	int tblsz = sizeof(struct nvme_nvm_bb_tbl) + nr_blks;
-	int ret = 0;
-
-	c.get_bb.opcode = nvme_nvm_admin_get_bb_tbl;
-	c.get_bb.nsid = cpu_to_le32(ns->head->ns_id);
-	c.get_bb.spba = cpu_to_le64(ppa.ppa);
-
-	bb_tbl = kzalloc(tblsz, GFP_KERNEL);
-	if (!bb_tbl)
-		return -ENOMEM;
-
-	ret = nvme_submit_sync_cmd(ctrl->admin_q, (struct nvme_command *)&c,
-								bb_tbl, tblsz);
-	if (ret) {
-		dev_err(ctrl->device, "get bad block table failed (%d)\n", ret);
-		ret = -EIO;
-		goto out;
-	}
-
-	if (bb_tbl->tblid[0] != 'B' || bb_tbl->tblid[1] != 'B' ||
-		bb_tbl->tblid[2] != 'L' || bb_tbl->tblid[3] != 'T') {
-		dev_err(ctrl->device, "bbt format mismatch\n");
-		ret = -EINVAL;
-		goto out;
-	}
-
-	if (le16_to_cpu(bb_tbl->verid) != 1) {
-		ret = -EINVAL;
-		dev_err(ctrl->device, "bbt version not supported\n");
-		goto out;
-	}
-
-	if (le32_to_cpu(bb_tbl->tblks) != nr_blks) {
-		ret = -EINVAL;
-		dev_err(ctrl->device,
-				"bbt unsuspected blocks returned (%u!=%u)",
-				le32_to_cpu(bb_tbl->tblks), nr_blks);
-		goto out;
-	}
-
-	memcpy(blks, bb_tbl->blk, geo->num_chk * geo->num_pln);
-out:
-	kfree(bb_tbl);
-	return ret;
-}
-
-static int nvme_nvm_set_bb_tbl(struct nvm_dev *nvmdev, struct ppa_addr *ppas,
-							int nr_ppas, int type)
-{
-	struct nvme_ns *ns = nvmdev->q->queuedata;
-	struct nvme_nvm_command c = {};
-	int ret = 0;
-
-	c.set_bb.opcode = nvme_nvm_admin_set_bb_tbl;
-	c.set_bb.nsid = cpu_to_le32(ns->head->ns_id);
-	c.set_bb.spba = cpu_to_le64(ppas->ppa);
-	c.set_bb.nlb = cpu_to_le16(nr_ppas - 1);
-	c.set_bb.value = type;
-
-	ret = nvme_submit_sync_cmd(ns->ctrl->admin_q, (struct nvme_command *)&c,
-								NULL, 0);
-	if (ret)
-		dev_err(ns->ctrl->device, "set bad block table failed (%d)\n",
-									ret);
-	return ret;
-}
-
-/*
- * Expect the lba in device format
- */
-static int nvme_nvm_get_chk_meta(struct nvm_dev *ndev,
-				 sector_t slba, int nchks,
-				 struct nvm_chk_meta *meta)
-{
-	struct nvm_geo *geo = &ndev->geo;
-	struct nvme_ns *ns = ndev->q->queuedata;
-	struct nvme_ctrl *ctrl = ns->ctrl;
-	struct nvme_nvm_chk_meta *dev_meta, *dev_meta_off;
-	struct ppa_addr ppa;
-	size_t left = nchks * sizeof(struct nvme_nvm_chk_meta);
-	size_t log_pos, offset, len;
-	int i, max_len;
-	int ret = 0;
-
-	/*
-	 * limit requests to maximum 256K to avoid issuing arbitrary large
-	 * requests when the device does not specific a maximum transfer size.
-	 */
-	max_len = min_t(unsigned int, ctrl->max_hw_sectors << 9, 256 * 1024);
-
-	dev_meta = kmalloc(max_len, GFP_KERNEL);
-	if (!dev_meta)
-		return -ENOMEM;
-
-	/* Normalize lba address space to obtain log offset */
-	ppa.ppa = slba;
-	ppa = dev_to_generic_addr(ndev, ppa);
-
-	log_pos = ppa.m.chk;
-	log_pos += ppa.m.pu * geo->num_chk;
-	log_pos += ppa.m.grp * geo->num_lun * geo->num_chk;
-
-	offset = log_pos * sizeof(struct nvme_nvm_chk_meta);
-
-	while (left) {
-		len = min_t(unsigned int, left, max_len);
-
-		memset(dev_meta, 0, max_len);
-		dev_meta_off = dev_meta;
-
-		ret = nvme_get_log(ctrl, ns->head->ns_id,
-				NVME_NVM_LOG_REPORT_CHUNK, 0, NVME_CSI_NVM,
-				dev_meta, len, offset);
-		if (ret) {
-			dev_err(ctrl->device, "Get REPORT CHUNK log error\n");
-			break;
-		}
-
-		for (i = 0; i < len; i += sizeof(struct nvme_nvm_chk_meta)) {
-			meta->state = dev_meta_off->state;
-			meta->type = dev_meta_off->type;
-			meta->wi = dev_meta_off->wi;
-			meta->slba = le64_to_cpu(dev_meta_off->slba);
-			meta->cnlb = le64_to_cpu(dev_meta_off->cnlb);
-			meta->wp = le64_to_cpu(dev_meta_off->wp);
-
-			meta++;
-			dev_meta_off++;
-		}
-
-		offset += len;
-		left -= len;
-	}
-
-	kfree(dev_meta);
-
-	return ret;
-}
-
-static inline void nvme_nvm_rqtocmd(struct nvm_rq *rqd, struct nvme_ns *ns,
-				    struct nvme_nvm_command *c)
-{
-	c->ph_rw.opcode = rqd->opcode;
-	c->ph_rw.nsid = cpu_to_le32(ns->head->ns_id);
-	c->ph_rw.spba = cpu_to_le64(rqd->ppa_addr.ppa);
-	c->ph_rw.metadata = cpu_to_le64(rqd->dma_meta_list);
-	c->ph_rw.control = cpu_to_le16(rqd->flags);
-	c->ph_rw.length = cpu_to_le16(rqd->nr_ppas - 1);
-}
-
-static void nvme_nvm_end_io(struct request *rq, blk_status_t status)
-{
-	struct nvm_rq *rqd = rq->end_io_data;
-
-	rqd->ppa_status = le64_to_cpu(nvme_req(rq)->result.u64);
-	rqd->error = nvme_req(rq)->status;
-	nvm_end_io(rqd);
-
-	kfree(nvme_req(rq)->cmd);
-	blk_mq_free_request(rq);
-}
-
-static struct request *nvme_nvm_alloc_request(struct request_queue *q,
-					      struct nvm_rq *rqd,
-					      struct nvme_nvm_command *cmd)
-{
-	struct nvme_ns *ns = q->queuedata;
-	struct request *rq;
-
-	nvme_nvm_rqtocmd(rqd, ns, cmd);
-
-	rq = nvme_alloc_request(q, (struct nvme_command *)cmd, 0);
-	if (IS_ERR(rq))
-		return rq;
-
-	rq->cmd_flags &= ~REQ_FAILFAST_DRIVER;
-
-	if (rqd->bio)
-		blk_rq_append_bio(rq, rqd->bio);
-	else
-		rq->ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, IOPRIO_NORM);
-
-	return rq;
-}
-
-static int nvme_nvm_submit_io(struct nvm_dev *dev, struct nvm_rq *rqd,
-			      void *buf)
-{
-	struct nvm_geo *geo = &dev->geo;
-	struct request_queue *q = dev->q;
-	struct nvme_nvm_command *cmd;
-	struct request *rq;
-	int ret;
-
-	cmd = kzalloc(sizeof(struct nvme_nvm_command), GFP_KERNEL);
-	if (!cmd)
-		return -ENOMEM;
-
-	rq = nvme_nvm_alloc_request(q, rqd, cmd);
-	if (IS_ERR(rq)) {
-		ret = PTR_ERR(rq);
-		goto err_free_cmd;
-	}
-
-	if (buf) {
-		ret = blk_rq_map_kern(q, rq, buf, geo->csecs * rqd->nr_ppas,
-				GFP_KERNEL);
-		if (ret)
-			goto err_free_cmd;
-	}
-
-	rq->end_io_data = rqd;
-
-	blk_execute_rq_nowait(NULL, rq, 0, nvme_nvm_end_io);
-
-	return 0;
-
-err_free_cmd:
-	kfree(cmd);
-	return ret;
-}
-
-static void *nvme_nvm_create_dma_pool(struct nvm_dev *nvmdev, char *name,
-					int size)
-{
-	struct nvme_ns *ns = nvmdev->q->queuedata;
-
-	return dma_pool_create(name, ns->ctrl->dev, size, PAGE_SIZE, 0);
-}
-
-static void nvme_nvm_destroy_dma_pool(void *pool)
-{
-	struct dma_pool *dma_pool = pool;
-
-	dma_pool_destroy(dma_pool);
-}
-
-static void *nvme_nvm_dev_dma_alloc(struct nvm_dev *dev, void *pool,
-				    gfp_t mem_flags, dma_addr_t *dma_handler)
-{
-	return dma_pool_alloc(pool, mem_flags, dma_handler);
-}
-
-static void nvme_nvm_dev_dma_free(void *pool, void *addr,
-							dma_addr_t dma_handler)
-{
-	dma_pool_free(pool, addr, dma_handler);
-}
-
-static struct nvm_dev_ops nvme_nvm_dev_ops = {
-	.identity		= nvme_nvm_identity,
-
-	.get_bb_tbl		= nvme_nvm_get_bb_tbl,
-	.set_bb_tbl		= nvme_nvm_set_bb_tbl,
-
-	.get_chk_meta		= nvme_nvm_get_chk_meta,
-
-	.submit_io		= nvme_nvm_submit_io,
-
-	.create_dma_pool	= nvme_nvm_create_dma_pool,
-	.destroy_dma_pool	= nvme_nvm_destroy_dma_pool,
-	.dev_dma_alloc		= nvme_nvm_dev_dma_alloc,
-	.dev_dma_free		= nvme_nvm_dev_dma_free,
-};
-
-static int nvme_nvm_submit_user_cmd(struct request_queue *q,
-				struct nvme_ns *ns,
-				struct nvme_nvm_command *vcmd,
-				void __user *ubuf, unsigned int bufflen,
-				void __user *meta_buf, unsigned int meta_len,
-				void __user *ppa_buf, unsigned int ppa_len,
-				u32 *result, u64 *status, unsigned int timeout)
-{
-	bool write = nvme_is_write((struct nvme_command *)vcmd);
-	struct nvm_dev *dev = ns->ndev;
-	struct request *rq;
-	struct bio *bio = NULL;
-	__le64 *ppa_list = NULL;
-	dma_addr_t ppa_dma;
-	__le64 *metadata = NULL;
-	dma_addr_t metadata_dma;
-	DECLARE_COMPLETION_ONSTACK(wait);
-	int ret = 0;
-
-	rq = nvme_alloc_request(q, (struct nvme_command *)vcmd, 0);
-	if (IS_ERR(rq)) {
-		ret = -ENOMEM;
-		goto err_cmd;
-	}
-
-	if (timeout)
-		rq->timeout = timeout;
-
-	if (ppa_buf && ppa_len) {
-		ppa_list = dma_pool_alloc(dev->dma_pool, GFP_KERNEL, &ppa_dma);
-		if (!ppa_list) {
-			ret = -ENOMEM;
-			goto err_rq;
-		}
-		if (copy_from_user(ppa_list, (void __user *)ppa_buf,
-						sizeof(u64) * (ppa_len + 1))) {
-			ret = -EFAULT;
-			goto err_ppa;
-		}
-		vcmd->ph_rw.spba = cpu_to_le64(ppa_dma);
-	} else {
-		vcmd->ph_rw.spba = cpu_to_le64((uintptr_t)ppa_buf);
-	}
-
-	if (ubuf && bufflen) {
-		ret = blk_rq_map_user(q, rq, NULL, ubuf, bufflen, GFP_KERNEL);
-		if (ret)
-			goto err_ppa;
-		bio = rq->bio;
-
-		if (meta_buf && meta_len) {
-			metadata = dma_pool_alloc(dev->dma_pool, GFP_KERNEL,
-								&metadata_dma);
-			if (!metadata) {
-				ret = -ENOMEM;
-				goto err_map;
-			}
-
-			if (write) {
-				if (copy_from_user(metadata,
-						(void __user *)meta_buf,
-						meta_len)) {
-					ret = -EFAULT;
-					goto err_meta;
-				}
-			}
-			vcmd->ph_rw.metadata = cpu_to_le64(metadata_dma);
-		}
-
-		bio_set_dev(bio, ns->disk->part0);
-	}
-
-	blk_execute_rq(NULL, rq, 0);
-
-	if (nvme_req(rq)->flags & NVME_REQ_CANCELLED)
-		ret = -EINTR;
-	else if (nvme_req(rq)->status & 0x7ff)
-		ret = -EIO;
-	if (result)
-		*result = nvme_req(rq)->status & 0x7ff;
-	if (status)
-		*status = le64_to_cpu(nvme_req(rq)->result.u64);
-
-	if (metadata && !ret && !write) {
-		if (copy_to_user(meta_buf, (void *)metadata, meta_len))
-			ret = -EFAULT;
-	}
-err_meta:
-	if (meta_buf && meta_len)
-		dma_pool_free(dev->dma_pool, metadata, metadata_dma);
-err_map:
-	if (bio)
-		blk_rq_unmap_user(bio);
-err_ppa:
-	if (ppa_buf && ppa_len)
-		dma_pool_free(dev->dma_pool, ppa_list, ppa_dma);
-err_rq:
-	blk_mq_free_request(rq);
-err_cmd:
-	return ret;
-}
-
-static int nvme_nvm_submit_vio(struct nvme_ns *ns,
-					struct nvm_user_vio __user *uvio)
-{
-	struct nvm_user_vio vio;
-	struct nvme_nvm_command c;
-	unsigned int length;
-	int ret;
-
-	if (copy_from_user(&vio, uvio, sizeof(vio)))
-		return -EFAULT;
-	if (vio.flags)
-		return -EINVAL;
-
-	memset(&c, 0, sizeof(c));
-	c.ph_rw.opcode = vio.opcode;
-	c.ph_rw.nsid = cpu_to_le32(ns->head->ns_id);
-	c.ph_rw.control = cpu_to_le16(vio.control);
-	c.ph_rw.length = cpu_to_le16(vio.nppas);
-
-	length = (vio.nppas + 1) << ns->lba_shift;
-
-	ret = nvme_nvm_submit_user_cmd(ns->queue, ns, &c,
-			(void __user *)(uintptr_t)vio.addr, length,
-			(void __user *)(uintptr_t)vio.metadata,
-							vio.metadata_len,
-			(void __user *)(uintptr_t)vio.ppa_list, vio.nppas,
-			&vio.result, &vio.status, 0);
-
-	if (ret && copy_to_user(uvio, &vio, sizeof(vio)))
-		return -EFAULT;
-
-	return ret;
-}
-
-static int nvme_nvm_user_vcmd(struct nvme_ns *ns, int admin,
-					struct nvm_passthru_vio __user *uvcmd)
-{
-	struct nvm_passthru_vio vcmd;
-	struct nvme_nvm_command c;
-	struct request_queue *q;
-	unsigned int timeout = 0;
-	int ret;
-
-	if (copy_from_user(&vcmd, uvcmd, sizeof(vcmd)))
-		return -EFAULT;
-	if ((vcmd.opcode != 0xF2) && (!capable(CAP_SYS_ADMIN)))
-		return -EACCES;
-	if (vcmd.flags)
-		return -EINVAL;
-
-	memset(&c, 0, sizeof(c));
-	c.common.opcode = vcmd.opcode;
-	c.common.nsid = cpu_to_le32(ns->head->ns_id);
-	c.common.cdw2[0] = cpu_to_le32(vcmd.cdw2);
-	c.common.cdw2[1] = cpu_to_le32(vcmd.cdw3);
-	/* cdw11-12 */
-	c.ph_rw.length = cpu_to_le16(vcmd.nppas);
-	c.ph_rw.control  = cpu_to_le16(vcmd.control);
-	c.common.cdw13 = cpu_to_le32(vcmd.cdw13);
-	c.common.cdw14 = cpu_to_le32(vcmd.cdw14);
-	c.common.cdw15 = cpu_to_le32(vcmd.cdw15);
-
-	if (vcmd.timeout_ms)
-		timeout = msecs_to_jiffies(vcmd.timeout_ms);
-
-	q = admin ? ns->ctrl->admin_q : ns->queue;
-
-	ret = nvme_nvm_submit_user_cmd(q, ns,
-			(struct nvme_nvm_command *)&c,
-			(void __user *)(uintptr_t)vcmd.addr, vcmd.data_len,
-			(void __user *)(uintptr_t)vcmd.metadata,
-							vcmd.metadata_len,
-			(void __user *)(uintptr_t)vcmd.ppa_list, vcmd.nppas,
-			&vcmd.result, &vcmd.status, timeout);
-
-	if (ret && copy_to_user(uvcmd, &vcmd, sizeof(vcmd)))
-		return -EFAULT;
-
-	return ret;
-}
-
-int nvme_nvm_ioctl(struct nvme_ns *ns, unsigned int cmd, void __user *argp)
-{
-	switch (cmd) {
-	case NVME_NVM_IOCTL_ADMIN_VIO:
-		return nvme_nvm_user_vcmd(ns, 1, argp);
-	case NVME_NVM_IOCTL_IO_VIO:
-		return nvme_nvm_user_vcmd(ns, 0, argp);
-	case NVME_NVM_IOCTL_SUBMIT_VIO:
-		return nvme_nvm_submit_vio(ns, argp);
-	default:
-		return -ENOTTY;
-	}
-}
-
-int nvme_nvm_register(struct nvme_ns *ns, char *disk_name, int node)
-{
-	struct request_queue *q = ns->queue;
-	struct nvm_dev *dev;
-	struct nvm_geo *geo;
-
-	_nvme_nvm_check_size();
-
-	dev = nvm_alloc_dev(node);
-	if (!dev)
-		return -ENOMEM;
-
-	/* Note that csecs and sos will be overridden if it is a 1.2 drive. */
-	geo = &dev->geo;
-	geo->csecs = 1 << ns->lba_shift;
-	geo->sos = ns->ms;
-	if (ns->features & NVME_NS_EXT_LBAS)
-		geo->ext = true;
-	else
-		geo->ext = false;
-	geo->mdts = ns->ctrl->max_hw_sectors;
-
-	dev->q = q;
-	memcpy(dev->name, disk_name, DISK_NAME_LEN);
-	dev->ops = &nvme_nvm_dev_ops;
-	dev->private_data = ns;
-	ns->ndev = dev;
-
-	return nvm_register(dev);
-}
-
-void nvme_nvm_unregister(struct nvme_ns *ns)
-{
-	nvm_unregister(ns->ndev);
-}
-
-static ssize_t nvm_dev_attr_show(struct device *dev,
-		struct device_attribute *dattr, char *page)
-{
-	struct nvme_ns *ns = nvme_get_ns_from_dev(dev);
-	struct nvm_dev *ndev = ns->ndev;
-	struct nvm_geo *geo = &ndev->geo;
-	struct attribute *attr;
-
-	if (!ndev)
-		return 0;
-
-	attr = &dattr->attr;
-
-	if (strcmp(attr->name, "version") == 0) {
-		if (geo->major_ver_id == 1)
-			return scnprintf(page, PAGE_SIZE, "%u\n",
-						geo->major_ver_id);
-		else
-			return scnprintf(page, PAGE_SIZE, "%u.%u\n",
-						geo->major_ver_id,
-						geo->minor_ver_id);
-	} else if (strcmp(attr->name, "capabilities") == 0) {
-		return scnprintf(page, PAGE_SIZE, "%u\n", geo->cap);
-	} else if (strcmp(attr->name, "read_typ") == 0) {
-		return scnprintf(page, PAGE_SIZE, "%u\n", geo->trdt);
-	} else if (strcmp(attr->name, "read_max") == 0) {
-		return scnprintf(page, PAGE_SIZE, "%u\n", geo->trdm);
-	} else {
-		return scnprintf(page,
-				 PAGE_SIZE,
-				 "Unhandled attr(%s) in `%s`\n",
-				 attr->name, __func__);
-	}
-}
-
-static ssize_t nvm_dev_attr_show_ppaf(struct nvm_addrf_12 *ppaf, char *page)
-{
-	return scnprintf(page, PAGE_SIZE,
-		"0x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x\n",
-				ppaf->ch_offset, ppaf->ch_len,
-				ppaf->lun_offset, ppaf->lun_len,
-				ppaf->pln_offset, ppaf->pln_len,
-				ppaf->blk_offset, ppaf->blk_len,
-				ppaf->pg_offset, ppaf->pg_len,
-				ppaf->sec_offset, ppaf->sec_len);
-}
-
-static ssize_t nvm_dev_attr_show_12(struct device *dev,
-		struct device_attribute *dattr, char *page)
-{
-	struct nvme_ns *ns = nvme_get_ns_from_dev(dev);
-	struct nvm_dev *ndev = ns->ndev;
-	struct nvm_geo *geo = &ndev->geo;
-	struct attribute *attr;
-
-	if (!ndev)
-		return 0;
-
-	attr = &dattr->attr;
-
-	if (strcmp(attr->name, "vendor_opcode") == 0) {
-		return scnprintf(page, PAGE_SIZE, "%u\n", geo->vmnt);
-	} else if (strcmp(attr->name, "device_mode") == 0) {
-		return scnprintf(page, PAGE_SIZE, "%u\n", geo->dom);
-	/* kept for compatibility */
-	} else if (strcmp(attr->name, "media_manager") == 0) {
-		return scnprintf(page, PAGE_SIZE, "%s\n", "gennvm");
-	} else if (strcmp(attr->name, "ppa_format") == 0) {
-		return nvm_dev_attr_show_ppaf((void *)&geo->addrf, page);
-	} else if (strcmp(attr->name, "media_type") == 0) {	/* u8 */
-		return scnprintf(page, PAGE_SIZE, "%u\n", geo->mtype);
-	} else if (strcmp(attr->name, "flash_media_type") == 0) {
-		return scnprintf(page, PAGE_SIZE, "%u\n", geo->fmtype);
-	} else if (strcmp(attr->name, "num_channels") == 0) {
-		return scnprintf(page, PAGE_SIZE, "%u\n", geo->num_ch);
-	} else if (strcmp(attr->name, "num_luns") == 0) {
-		return scnprintf(page, PAGE_SIZE, "%u\n", geo->num_lun);
-	} else if (strcmp(attr->name, "num_planes") == 0) {
-		return scnprintf(page, PAGE_SIZE, "%u\n", geo->num_pln);
-	} else if (strcmp(attr->name, "num_blocks") == 0) {	/* u16 */
-		return scnprintf(page, PAGE_SIZE, "%u\n", geo->num_chk);
-	} else if (strcmp(attr->name, "num_pages") == 0) {
-		return scnprintf(page, PAGE_SIZE, "%u\n", geo->num_pg);
-	} else if (strcmp(attr->name, "page_size") == 0) {
-		return scnprintf(page, PAGE_SIZE, "%u\n", geo->fpg_sz);
-	} else if (strcmp(attr->name, "hw_sector_size") == 0) {
-		return scnprintf(page, PAGE_SIZE, "%u\n", geo->csecs);
-	} else if (strcmp(attr->name, "oob_sector_size") == 0) {/* u32 */
-		return scnprintf(page, PAGE_SIZE, "%u\n", geo->sos);
-	} else if (strcmp(attr->name, "prog_typ") == 0) {
-		return scnprintf(page, PAGE_SIZE, "%u\n", geo->tprt);
-	} else if (strcmp(attr->name, "prog_max") == 0) {
-		return scnprintf(page, PAGE_SIZE, "%u\n", geo->tprm);
-	} else if (strcmp(attr->name, "erase_typ") == 0) {
-		return scnprintf(page, PAGE_SIZE, "%u\n", geo->tbet);
-	} else if (strcmp(attr->name, "erase_max") == 0) {
-		return scnprintf(page, PAGE_SIZE, "%u\n", geo->tbem);
-	} else if (strcmp(attr->name, "multiplane_modes") == 0) {
-		return scnprintf(page, PAGE_SIZE, "0x%08x\n", geo->mpos);
-	} else if (strcmp(attr->name, "media_capabilities") == 0) {
-		return scnprintf(page, PAGE_SIZE, "0x%08x\n", geo->mccap);
-	} else if (strcmp(attr->name, "max_phys_secs") == 0) {
-		return scnprintf(page, PAGE_SIZE, "%u\n", NVM_MAX_VLBA);
-	} else {
-		return scnprintf(page, PAGE_SIZE,
-			"Unhandled attr(%s) in `%s`\n",
-			attr->name, __func__);
-	}
-}
-
-static ssize_t nvm_dev_attr_show_20(struct device *dev,
-		struct device_attribute *dattr, char *page)
-{
-	struct nvme_ns *ns = nvme_get_ns_from_dev(dev);
-	struct nvm_dev *ndev = ns->ndev;
-	struct nvm_geo *geo = &ndev->geo;
-	struct attribute *attr;
-
-	if (!ndev)
-		return 0;
-
-	attr = &dattr->attr;
-
-	if (strcmp(attr->name, "groups") == 0) {
-		return scnprintf(page, PAGE_SIZE, "%u\n", geo->num_ch);
-	} else if (strcmp(attr->name, "punits") == 0) {
-		return scnprintf(page, PAGE_SIZE, "%u\n", geo->num_lun);
-	} else if (strcmp(attr->name, "chunks") == 0) {
-		return scnprintf(page, PAGE_SIZE, "%u\n", geo->num_chk);
-	} else if (strcmp(attr->name, "clba") == 0) {
-		return scnprintf(page, PAGE_SIZE, "%u\n", geo->clba);
-	} else if (strcmp(attr->name, "ws_min") == 0) {
-		return scnprintf(page, PAGE_SIZE, "%u\n", geo->ws_min);
-	} else if (strcmp(attr->name, "ws_opt") == 0) {
-		return scnprintf(page, PAGE_SIZE, "%u\n", geo->ws_opt);
-	} else if (strcmp(attr->name, "maxoc") == 0) {
-		return scnprintf(page, PAGE_SIZE, "%u\n", geo->maxoc);
-	} else if (strcmp(attr->name, "maxocpu") == 0) {
-		return scnprintf(page, PAGE_SIZE, "%u\n", geo->maxocpu);
-	} else if (strcmp(attr->name, "mw_cunits") == 0) {
-		return scnprintf(page, PAGE_SIZE, "%u\n", geo->mw_cunits);
-	} else if (strcmp(attr->name, "write_typ") == 0) {
-		return scnprintf(page, PAGE_SIZE, "%u\n", geo->tprt);
-	} else if (strcmp(attr->name, "write_max") == 0) {
-		return scnprintf(page, PAGE_SIZE, "%u\n", geo->tprm);
-	} else if (strcmp(attr->name, "reset_typ") == 0) {
-		return scnprintf(page, PAGE_SIZE, "%u\n", geo->tbet);
-	} else if (strcmp(attr->name, "reset_max") == 0) {
-		return scnprintf(page, PAGE_SIZE, "%u\n", geo->tbem);
-	} else {
-		return scnprintf(page, PAGE_SIZE,
-			"Unhandled attr(%s) in `%s`\n",
-			attr->name, __func__);
-	}
-}
-
-#define NVM_DEV_ATTR_RO(_name)					\
-	DEVICE_ATTR(_name, S_IRUGO, nvm_dev_attr_show, NULL)
-#define NVM_DEV_ATTR_12_RO(_name)					\
-	DEVICE_ATTR(_name, S_IRUGO, nvm_dev_attr_show_12, NULL)
-#define NVM_DEV_ATTR_20_RO(_name)					\
-	DEVICE_ATTR(_name, S_IRUGO, nvm_dev_attr_show_20, NULL)
-
-/* general attributes */
-static NVM_DEV_ATTR_RO(version);
-static NVM_DEV_ATTR_RO(capabilities);
-
-static NVM_DEV_ATTR_RO(read_typ);
-static NVM_DEV_ATTR_RO(read_max);
-
-/* 1.2 values */
-static NVM_DEV_ATTR_12_RO(vendor_opcode);
-static NVM_DEV_ATTR_12_RO(device_mode);
-static NVM_DEV_ATTR_12_RO(ppa_format);
-static NVM_DEV_ATTR_12_RO(media_manager);
-static NVM_DEV_ATTR_12_RO(media_type);
-static NVM_DEV_ATTR_12_RO(flash_media_type);
-static NVM_DEV_ATTR_12_RO(num_channels);
-static NVM_DEV_ATTR_12_RO(num_luns);
-static NVM_DEV_ATTR_12_RO(num_planes);
-static NVM_DEV_ATTR_12_RO(num_blocks);
-static NVM_DEV_ATTR_12_RO(num_pages);
-static NVM_DEV_ATTR_12_RO(page_size);
-static NVM_DEV_ATTR_12_RO(hw_sector_size);
-static NVM_DEV_ATTR_12_RO(oob_sector_size);
-static NVM_DEV_ATTR_12_RO(prog_typ);
-static NVM_DEV_ATTR_12_RO(prog_max);
-static NVM_DEV_ATTR_12_RO(erase_typ);
-static NVM_DEV_ATTR_12_RO(erase_max);
-static NVM_DEV_ATTR_12_RO(multiplane_modes);
-static NVM_DEV_ATTR_12_RO(media_capabilities);
-static NVM_DEV_ATTR_12_RO(max_phys_secs);
-
-/* 2.0 values */
-static NVM_DEV_ATTR_20_RO(groups);
-static NVM_DEV_ATTR_20_RO(punits);
-static NVM_DEV_ATTR_20_RO(chunks);
-static NVM_DEV_ATTR_20_RO(clba);
-static NVM_DEV_ATTR_20_RO(ws_min);
-static NVM_DEV_ATTR_20_RO(ws_opt);
-static NVM_DEV_ATTR_20_RO(maxoc);
-static NVM_DEV_ATTR_20_RO(maxocpu);
-static NVM_DEV_ATTR_20_RO(mw_cunits);
-static NVM_DEV_ATTR_20_RO(write_typ);
-static NVM_DEV_ATTR_20_RO(write_max);
-static NVM_DEV_ATTR_20_RO(reset_typ);
-static NVM_DEV_ATTR_20_RO(reset_max);
-
-static struct attribute *nvm_dev_attrs[] = {
-	/* version agnostic attrs */
-	&dev_attr_version.attr,
-	&dev_attr_capabilities.attr,
-	&dev_attr_read_typ.attr,
-	&dev_attr_read_max.attr,
-
-	/* 1.2 attrs */
-	&dev_attr_vendor_opcode.attr,
-	&dev_attr_device_mode.attr,
-	&dev_attr_media_manager.attr,
-	&dev_attr_ppa_format.attr,
-	&dev_attr_media_type.attr,
-	&dev_attr_flash_media_type.attr,
-	&dev_attr_num_channels.attr,
-	&dev_attr_num_luns.attr,
-	&dev_attr_num_planes.attr,
-	&dev_attr_num_blocks.attr,
-	&dev_attr_num_pages.attr,
-	&dev_attr_page_size.attr,
-	&dev_attr_hw_sector_size.attr,
-	&dev_attr_oob_sector_size.attr,
-	&dev_attr_prog_typ.attr,
-	&dev_attr_prog_max.attr,
-	&dev_attr_erase_typ.attr,
-	&dev_attr_erase_max.attr,
-	&dev_attr_multiplane_modes.attr,
-	&dev_attr_media_capabilities.attr,
-	&dev_attr_max_phys_secs.attr,
-
-	/* 2.0 attrs */
-	&dev_attr_groups.attr,
-	&dev_attr_punits.attr,
-	&dev_attr_chunks.attr,
-	&dev_attr_clba.attr,
-	&dev_attr_ws_min.attr,
-	&dev_attr_ws_opt.attr,
-	&dev_attr_maxoc.attr,
-	&dev_attr_maxocpu.attr,
-	&dev_attr_mw_cunits.attr,
-
-	&dev_attr_write_typ.attr,
-	&dev_attr_write_max.attr,
-	&dev_attr_reset_typ.attr,
-	&dev_attr_reset_max.attr,
-
-	NULL,
-};
-
-static umode_t nvm_dev_attrs_visible(struct kobject *kobj,
-				     struct attribute *attr, int index)
-{
-	struct device *dev = kobj_to_dev(kobj);
-	struct gendisk *disk = dev_to_disk(dev);
-	struct nvme_ns *ns = disk->private_data;
-	struct nvm_dev *ndev = ns->ndev;
-	struct device_attribute *dev_attr =
-		container_of(attr, typeof(*dev_attr), attr);
-
-	if (!ndev)
-		return 0;
-
-	if (dev_attr->show == nvm_dev_attr_show)
-		return attr->mode;
-
-	switch (ndev->geo.major_ver_id) {
-	case 1:
-		if (dev_attr->show == nvm_dev_attr_show_12)
-			return attr->mode;
-		break;
-	case 2:
-		if (dev_attr->show == nvm_dev_attr_show_20)
-			return attr->mode;
-		break;
-	}
-
-	return 0;
-}
-
-const struct attribute_group nvme_nvm_attr_group = {
-	.name		= "lightnvm",
-	.attrs		= nvm_dev_attrs,
-	.is_visible	= nvm_dev_attrs_visible,
-};
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index 5cd1fa3b8464..a2e1f298b217 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -11,7 +11,6 @@
 #include <linux/pci.h>
 #include <linux/kref.h>
 #include <linux/blk-mq.h>
-#include <linux/lightnvm.h>
 #include <linux/sed-opal.h>
 #include <linux/fault-inject.h>
 #include <linux/rcupdate.h>
@@ -48,11 +47,6 @@ extern struct workqueue_struct *nvme_wq;
 extern struct workqueue_struct *nvme_reset_wq;
 extern struct workqueue_struct *nvme_delete_wq;
 
-enum {
-	NVME_NS_LBA		= 0,
-	NVME_NS_LIGHTNVM	= 1,
-};
-
 /*
  * List of workarounds for devices that required behavior not specified in
  * the standard.
@@ -93,11 +87,6 @@ enum nvme_quirks {
 	NVME_QUIRK_NO_DEEPEST_PS		= (1 << 5),
 
 	/*
-	 * Supports the LighNVM command set if indicated in vs[1].
-	 */
-	NVME_QUIRK_LIGHTNVM			= (1 << 6),
-
-	/*
 	 * Set MEDIUM priority on SQ creation
 	 */
 	NVME_QUIRK_MEDIUM_PRIO_SQ		= (1 << 7),
@@ -158,6 +147,7 @@ enum nvme_quirks {
 struct nvme_request {
 	struct nvme_command	*cmd;
 	union nvme_result	result;
+	u8			genctr;
 	u8			retries;
 	u8			flags;
 	u16			status;
@@ -449,7 +439,6 @@ struct nvme_ns {
 	u32 ana_grpid;
 #endif
 	struct list_head siblings;
-	struct nvm_dev *ndev;
 	struct kref kref;
 	struct nvme_ns_head *head;
 
@@ -497,6 +486,49 @@ struct nvme_ctrl_ops {
 	int (*get_address)(struct nvme_ctrl *ctrl, char *buf, int size);
 };
 
+/*
+ * nvme command_id is constructed as such:
+ * | xxxx | xxxxxxxxxxxx |
+ *   gen    request tag
+ */
+#define nvme_genctr_mask(gen)			(gen & 0xf)
+#define nvme_cid_install_genctr(gen)		(nvme_genctr_mask(gen) << 12)
+#define nvme_genctr_from_cid(cid)		((cid & 0xf000) >> 12)
+#define nvme_tag_from_cid(cid)			(cid & 0xfff)
+
+static inline u16 nvme_cid(struct request *rq)
+{
+	return nvme_cid_install_genctr(nvme_req(rq)->genctr) | rq->tag;
+}
+
+static inline struct request *nvme_find_rq(struct blk_mq_tags *tags,
+		u16 command_id)
+{
+	u8 genctr = nvme_genctr_from_cid(command_id);
+	u16 tag = nvme_tag_from_cid(command_id);
+	struct request *rq;
+
+	rq = blk_mq_tag_to_rq(tags, tag);
+	if (unlikely(!rq)) {
+		pr_err("could not locate request for tag %#x\n",
+			tag);
+		return NULL;
+	}
+	if (unlikely(nvme_genctr_mask(nvme_req(rq)->genctr) != genctr)) {
+		dev_err(nvme_req(rq)->ctrl->device,
+			"request %#x genctr mismatch (got %#x expected %#x)\n",
+			tag, genctr, nvme_genctr_mask(nvme_req(rq)->genctr));
+		return NULL;
+	}
+	return rq;
+}
+
+static inline struct request *nvme_cid_to_rq(struct blk_mq_tags *tags,
+                u16 command_id)
+{
+	return blk_mq_tag_to_rq(tags, nvme_tag_from_cid(command_id));
+}
+
 #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
 void nvme_fault_inject_init(struct nvme_fault_inject *fault_inj,
 			    const char *dev_name);
@@ -594,7 +626,8 @@ static inline void nvme_put_ctrl(struct nvme_ctrl *ctrl)
 
 static inline bool nvme_is_aen_req(u16 qid, __u16 command_id)
 {
-	return !qid && command_id >= NVME_AQ_BLK_MQ_DEPTH;
+	return !qid &&
+		nvme_tag_from_cid(command_id) >= NVME_AQ_BLK_MQ_DEPTH;
 }
 
 void nvme_complete_rq(struct request *req);
@@ -823,26 +856,6 @@ static inline int nvme_update_zone_info(struct nvme_ns *ns, unsigned lbaf)
 }
 #endif
 
-#ifdef CONFIG_NVM
-int nvme_nvm_register(struct nvme_ns *ns, char *disk_name, int node);
-void nvme_nvm_unregister(struct nvme_ns *ns);
-extern const struct attribute_group nvme_nvm_attr_group;
-int nvme_nvm_ioctl(struct nvme_ns *ns, unsigned int cmd, void __user *argp);
-#else
-static inline int nvme_nvm_register(struct nvme_ns *ns, char *disk_name,
-				    int node)
-{
-	return 0;
-}
-
-static inline void nvme_nvm_unregister(struct nvme_ns *ns) {};
-static inline int nvme_nvm_ioctl(struct nvme_ns *ns, unsigned int cmd,
-		void __user *argp)
-{
-	return -ENOTTY;
-}
-#endif /* CONFIG_NVM */
-
 static inline struct nvme_ns *nvme_get_ns_from_dev(struct device *dev)
 {
 	return dev_to_disk(dev)->private_data;
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index 51852085239e..b82492cd7503 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -60,6 +60,8 @@ MODULE_PARM_DESC(sgl_threshold,
 		"Use SGLs when average request segment size is larger or equal to "
 		"this size. Use 0 to disable SGLs.");
 
+#define NVME_PCI_MIN_QUEUE_SIZE 2
+#define NVME_PCI_MAX_QUEUE_SIZE 4095
 static int io_queue_depth_set(const char *val, const struct kernel_param *kp);
 static const struct kernel_param_ops io_queue_depth_ops = {
 	.set = io_queue_depth_set,
@@ -68,7 +70,7 @@ static const struct kernel_param_ops io_queue_depth_ops = {
 
 static unsigned int io_queue_depth = 1024;
 module_param_cb(io_queue_depth, &io_queue_depth_ops, &io_queue_depth, 0644);
-MODULE_PARM_DESC(io_queue_depth, "set io queue depth, should >= 2");
+MODULE_PARM_DESC(io_queue_depth, "set io queue depth, should >= 2 and < 4096");
 
 static int io_queue_count_set(const char *val, const struct kernel_param *kp)
 {
@@ -135,6 +137,7 @@ struct nvme_dev {
 	u32 cmbloc;
 	struct nvme_ctrl ctrl;
 	u32 last_ps;
+	bool hmb;
 
 	mempool_t *iod_mempool;
 
@@ -153,18 +156,14 @@ struct nvme_dev {
 	unsigned int nr_allocated_queues;
 	unsigned int nr_write_queues;
 	unsigned int nr_poll_queues;
+
+	bool attrs_added;
 };
 
 static int io_queue_depth_set(const char *val, const struct kernel_param *kp)
 {
-	int ret;
-	u32 n;
-
-	ret = kstrtou32(val, 10, &n);
-	if (ret != 0 || n < 2)
-		return -EINVAL;
-
-	return param_set_uint(val, kp);
+	return param_set_uint_minmax(val, kp, NVME_PCI_MIN_QUEUE_SIZE,
+			NVME_PCI_MAX_QUEUE_SIZE);
 }
 
 static inline unsigned int sq_idx(unsigned int qid, u32 stride)
@@ -1014,7 +1013,7 @@ static inline void nvme_handle_cqe(struct nvme_queue *nvmeq, u16 idx)
 		return;
 	}
 
-	req = blk_mq_tag_to_rq(nvme_queue_tagset(nvmeq), command_id);
+	req = nvme_find_rq(nvme_queue_tagset(nvmeq), command_id);
 	if (unlikely(!req)) {
 		dev_warn(nvmeq->dev->ctrl.device,
 			"invalid id %d completed on queue %d\n",
@@ -1808,17 +1807,6 @@ static int nvme_create_io_queues(struct nvme_dev *dev)
 	return ret >= 0 ? 0 : ret;
 }
 
-static ssize_t nvme_cmb_show(struct device *dev,
-			     struct device_attribute *attr,
-			     char *buf)
-{
-	struct nvme_dev *ndev = to_nvme_dev(dev_get_drvdata(dev));
-
-	return scnprintf(buf, PAGE_SIZE, "cmbloc : x%08x\ncmbsz  : x%08x\n",
-		       ndev->cmbloc, ndev->cmbsz);
-}
-static DEVICE_ATTR(cmb, S_IRUGO, nvme_cmb_show, NULL);
-
 static u64 nvme_cmb_size_unit(struct nvme_dev *dev)
 {
 	u8 szu = (dev->cmbsz >> NVME_CMBSZ_SZU_SHIFT) & NVME_CMBSZ_SZU_MASK;
@@ -1887,20 +1875,6 @@ static void nvme_map_cmb(struct nvme_dev *dev)
 	if ((dev->cmbsz & (NVME_CMBSZ_WDS | NVME_CMBSZ_RDS)) ==
 			(NVME_CMBSZ_WDS | NVME_CMBSZ_RDS))
 		pci_p2pmem_publish(pdev, true);
-
-	if (sysfs_add_file_to_group(&dev->ctrl.device->kobj,
-				    &dev_attr_cmb.attr, NULL))
-		dev_warn(dev->ctrl.device,
-			 "failed to add sysfs attribute for CMB\n");
-}
-
-static inline void nvme_release_cmb(struct nvme_dev *dev)
-{
-	if (dev->cmb_size) {
-		sysfs_remove_file_from_group(&dev->ctrl.device->kobj,
-					     &dev_attr_cmb.attr, NULL);
-		dev->cmb_size = 0;
-	}
 }
 
 static int nvme_set_host_mem(struct nvme_dev *dev, u32 bits)
@@ -1923,7 +1897,9 @@ static int nvme_set_host_mem(struct nvme_dev *dev, u32 bits)
 		dev_warn(dev->ctrl.device,
 			 "failed to set host mem (err %d, flags %#x).\n",
 			 ret, bits);
-	}
+	} else
+		dev->hmb = bits & NVME_HOST_MEM_ENABLE;
+
 	return ret;
 }
 
@@ -2080,6 +2056,102 @@ static int nvme_setup_host_mem(struct nvme_dev *dev)
 	return ret;
 }
 
+static ssize_t cmb_show(struct device *dev, struct device_attribute *attr,
+		char *buf)
+{
+	struct nvme_dev *ndev = to_nvme_dev(dev_get_drvdata(dev));
+
+	return sysfs_emit(buf, "cmbloc : x%08x\ncmbsz  : x%08x\n",
+		       ndev->cmbloc, ndev->cmbsz);
+}
+static DEVICE_ATTR_RO(cmb);
+
+static ssize_t cmbloc_show(struct device *dev, struct device_attribute *attr,
+		char *buf)
+{
+	struct nvme_dev *ndev = to_nvme_dev(dev_get_drvdata(dev));
+
+	return sysfs_emit(buf, "%u\n", ndev->cmbloc);
+}
+static DEVICE_ATTR_RO(cmbloc);
+
+static ssize_t cmbsz_show(struct device *dev, struct device_attribute *attr,
+		char *buf)
+{
+	struct nvme_dev *ndev = to_nvme_dev(dev_get_drvdata(dev));
+
+	return sysfs_emit(buf, "%u\n", ndev->cmbsz);
+}
+static DEVICE_ATTR_RO(cmbsz);
+
+static ssize_t hmb_show(struct device *dev, struct device_attribute *attr,
+			char *buf)
+{
+	struct nvme_dev *ndev = to_nvme_dev(dev_get_drvdata(dev));
+
+	return sysfs_emit(buf, "%d\n", ndev->hmb);
+}
+
+static ssize_t hmb_store(struct device *dev, struct device_attribute *attr,
+			 const char *buf, size_t count)
+{
+	struct nvme_dev *ndev = to_nvme_dev(dev_get_drvdata(dev));
+	bool new;
+	int ret;
+
+	if (strtobool(buf, &new) < 0)
+		return -EINVAL;
+
+	if (new == ndev->hmb)
+		return count;
+
+	if (new) {
+		ret = nvme_setup_host_mem(ndev);
+	} else {
+		ret = nvme_set_host_mem(ndev, 0);
+		if (!ret)
+			nvme_free_host_mem(ndev);
+	}
+
+	if (ret < 0)
+		return ret;
+
+	return count;
+}
+static DEVICE_ATTR_RW(hmb);
+
+static umode_t nvme_pci_attrs_are_visible(struct kobject *kobj,
+		struct attribute *a, int n)
+{
+	struct nvme_ctrl *ctrl =
+		dev_get_drvdata(container_of(kobj, struct device, kobj));
+	struct nvme_dev *dev = to_nvme_dev(ctrl);
+
+	if (a == &dev_attr_cmb.attr ||
+	    a == &dev_attr_cmbloc.attr ||
+	    a == &dev_attr_cmbsz.attr) {
+	    	if (!dev->cmbsz)
+			return 0;
+	}
+	if (a == &dev_attr_hmb.attr && !ctrl->hmpre)
+		return 0;
+
+	return a->mode;
+}
+
+static struct attribute *nvme_pci_attrs[] = {
+	&dev_attr_cmb.attr,
+	&dev_attr_cmbloc.attr,
+	&dev_attr_cmbsz.attr,
+	&dev_attr_hmb.attr,
+	NULL,
+};
+
+static const struct attribute_group nvme_pci_attr_group = {
+	.attrs		= nvme_pci_attrs,
+	.is_visible	= nvme_pci_attrs_are_visible,
+};
+
 /*
  * nirqs is the number of interrupts available for write and read
  * queues. The core already reserved an interrupt for the admin queue.
@@ -2751,6 +2823,10 @@ static void nvme_reset_work(struct work_struct *work)
 		goto out;
 	}
 
+	if (!dev->attrs_added && !sysfs_create_group(&dev->ctrl.device->kobj,
+			&nvme_pci_attr_group))
+		dev->attrs_added = true;
+
 	nvme_start_ctrl(&dev->ctrl);
 	return;
 
@@ -2999,6 +3075,13 @@ static void nvme_shutdown(struct pci_dev *pdev)
 	nvme_disable_prepare_reset(dev, true);
 }
 
+static void nvme_remove_attrs(struct nvme_dev *dev)
+{
+	if (dev->attrs_added)
+		sysfs_remove_group(&dev->ctrl.device->kobj,
+				   &nvme_pci_attr_group);
+}
+
 /*
  * The driver's remove may be called on a device in a partially initialized
  * state. This function must not have any dependencies on the device state in
@@ -3020,7 +3103,7 @@ static void nvme_remove(struct pci_dev *pdev)
 	nvme_stop_ctrl(&dev->ctrl);
 	nvme_remove_namespaces(&dev->ctrl);
 	nvme_dev_disable(dev, true);
-	nvme_release_cmb(dev);
+	nvme_remove_attrs(dev);
 	nvme_free_host_mem(dev);
 	nvme_dev_remove_admin(dev);
 	nvme_free_queues(dev, 0);
@@ -3047,8 +3130,13 @@ static int nvme_resume(struct device *dev)
 
 	if (ndev->last_ps == U32_MAX ||
 	    nvme_set_power_state(ctrl, ndev->last_ps) != 0)
-		return nvme_try_sched_reset(&ndev->ctrl);
+		goto reset;
+	if (ctrl->hmpre && nvme_setup_host_mem(ndev))
+		goto reset;
+
 	return 0;
+reset:
+	return nvme_try_sched_reset(ctrl);
 }
 
 static int nvme_suspend(struct device *dev)
@@ -3072,15 +3160,9 @@ static int nvme_suspend(struct device *dev)
 	 * the PCI bus layer to put it into D3 in order to take the PCIe link
 	 * down, so as to allow the platform to achieve its minimum low-power
 	 * state (which may not be possible if the link is up).
-	 *
-	 * If a host memory buffer is enabled, shut down the device as the NVMe
-	 * specification allows the device to access the host memory buffer in
-	 * host DRAM from all power states, but hosts will fail access to DRAM
-	 * during S3.
 	 */
 	if (pm_suspend_via_firmware() || !ctrl->npss ||
 	    !pcie_aspm_enabled(pdev) ||
-	    ndev->nr_host_mem_descs ||
 	    (ndev->ctrl.quirks & NVME_QUIRK_SIMPLE_SUSPEND))
 		return nvme_disable_prepare_reset(ndev, true);
 
@@ -3091,6 +3173,17 @@ static int nvme_suspend(struct device *dev)
 	if (ctrl->state != NVME_CTRL_LIVE)
 		goto unfreeze;
 
+	/*
+	 * Host memory access may not be successful in a system suspend state,
+	 * but the specification allows the controller to access memory in a
+	 * non-operational power state.
+	 */
+	if (ndev->hmb) {
+		ret = nvme_set_host_mem(ndev, 0);
+		if (ret < 0)
+			goto unfreeze;
+	}
+
 	ret = nvme_get_power_state(ctrl, &ndev->last_ps);
 	if (ret < 0)
 		goto unfreeze;
@@ -3243,12 +3336,6 @@ static const struct pci_device_id nvme_id_table[] = {
 	{ PCI_DEVICE(0x1b4b, 0x1092),	/* Lexar 256 GB SSD */
 		.driver_data = NVME_QUIRK_NO_NS_DESC_LIST |
 				NVME_QUIRK_IGNORE_DEV_SUBNQN, },
-	{ PCI_DEVICE(0x1d1d, 0x1f1f),	/* LighNVM qemu device */
-		.driver_data = NVME_QUIRK_LIGHTNVM, },
-	{ PCI_DEVICE(0x1d1d, 0x2807),	/* CNEX WL */
-		.driver_data = NVME_QUIRK_LIGHTNVM, },
-	{ PCI_DEVICE(0x1d1d, 0x2601),	/* CNEX Granby */
-		.driver_data = NVME_QUIRK_LIGHTNVM, },
 	{ PCI_DEVICE(0x10ec, 0x5762),   /* ADATA SX6000LNP */
 		.driver_data = NVME_QUIRK_IGNORE_DEV_SUBNQN, },
 	{ PCI_DEVICE(0x1cc1, 0x8201),   /* ADATA SX8200PNP 512GB */
diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c
index 7f6b3a991501..a68704e39084 100644
--- a/drivers/nvme/host/rdma.c
+++ b/drivers/nvme/host/rdma.c
@@ -735,13 +735,13 @@ static int nvme_rdma_alloc_io_queues(struct nvme_rdma_ctrl *ctrl)
 	if (ret)
 		return ret;
 
-	ctrl->ctrl.queue_count = nr_io_queues + 1;
-	if (ctrl->ctrl.queue_count < 2) {
+	if (nr_io_queues == 0) {
 		dev_err(ctrl->ctrl.device,
 			"unable to set any I/O queues\n");
 		return -ENOMEM;
 	}
 
+	ctrl->ctrl.queue_count = nr_io_queues + 1;
 	dev_info(ctrl->ctrl.device,
 		"creating %d I/O queues.\n", nr_io_queues);
 
@@ -1730,10 +1730,10 @@ static void nvme_rdma_process_nvme_rsp(struct nvme_rdma_queue *queue,
 	struct request *rq;
 	struct nvme_rdma_request *req;
 
-	rq = blk_mq_tag_to_rq(nvme_rdma_tagset(queue), cqe->command_id);
+	rq = nvme_find_rq(nvme_rdma_tagset(queue), cqe->command_id);
 	if (!rq) {
 		dev_err(queue->ctrl->ctrl.device,
-			"tag 0x%x on QP %#x not found\n",
+			"got bad command_id %#x on QP %#x\n",
 			cqe->command_id, queue->qp->qp_num);
 		nvme_rdma_error_recovery(queue->ctrl);
 		return;
diff --git a/drivers/nvme/host/tcp.c b/drivers/nvme/host/tcp.c
index 8cb15ee5b249..645025620154 100644
--- a/drivers/nvme/host/tcp.c
+++ b/drivers/nvme/host/tcp.c
@@ -487,11 +487,11 @@ static int nvme_tcp_process_nvme_cqe(struct nvme_tcp_queue *queue,
 {
 	struct request *rq;
 
-	rq = blk_mq_tag_to_rq(nvme_tcp_tagset(queue), cqe->command_id);
+	rq = nvme_find_rq(nvme_tcp_tagset(queue), cqe->command_id);
 	if (!rq) {
 		dev_err(queue->ctrl->ctrl.device,
-			"queue %d tag 0x%x not found\n",
-			nvme_tcp_queue_id(queue), cqe->command_id);
+			"got bad cqe.command_id %#x on queue %d\n",
+			cqe->command_id, nvme_tcp_queue_id(queue));
 		nvme_tcp_error_recovery(&queue->ctrl->ctrl);
 		return -EINVAL;
 	}
@@ -508,11 +508,11 @@ static int nvme_tcp_handle_c2h_data(struct nvme_tcp_queue *queue,
 {
 	struct request *rq;
 
-	rq = blk_mq_tag_to_rq(nvme_tcp_tagset(queue), pdu->command_id);
+	rq = nvme_find_rq(nvme_tcp_tagset(queue), pdu->command_id);
 	if (!rq) {
 		dev_err(queue->ctrl->ctrl.device,
-			"queue %d tag %#x not found\n",
-			nvme_tcp_queue_id(queue), pdu->command_id);
+			"got bad c2hdata.command_id %#x on queue %d\n",
+			pdu->command_id, nvme_tcp_queue_id(queue));
 		return -ENOENT;
 	}
 
@@ -606,7 +606,7 @@ static int nvme_tcp_setup_h2c_data_pdu(struct nvme_tcp_request *req,
 	data->hdr.plen =
 		cpu_to_le32(data->hdr.hlen + hdgst + req->pdu_len + ddgst);
 	data->ttag = pdu->ttag;
-	data->command_id = rq->tag;
+	data->command_id = nvme_cid(rq);
 	data->data_offset = cpu_to_le32(req->data_sent);
 	data->data_length = cpu_to_le32(req->pdu_len);
 	return 0;
@@ -619,11 +619,11 @@ static int nvme_tcp_handle_r2t(struct nvme_tcp_queue *queue,
 	struct request *rq;
 	int ret;
 
-	rq = blk_mq_tag_to_rq(nvme_tcp_tagset(queue), pdu->command_id);
+	rq = nvme_find_rq(nvme_tcp_tagset(queue), pdu->command_id);
 	if (!rq) {
 		dev_err(queue->ctrl->ctrl.device,
-			"queue %d tag %#x not found\n",
-			nvme_tcp_queue_id(queue), pdu->command_id);
+			"got bad r2t.command_id %#x on queue %d\n",
+			pdu->command_id, nvme_tcp_queue_id(queue));
 		return -ENOENT;
 	}
 	req = blk_mq_rq_to_pdu(rq);
@@ -702,17 +702,9 @@ static int nvme_tcp_recv_data(struct nvme_tcp_queue *queue, struct sk_buff *skb,
 			      unsigned int *offset, size_t *len)
 {
 	struct nvme_tcp_data_pdu *pdu = (void *)queue->pdu;
-	struct nvme_tcp_request *req;
-	struct request *rq;
-
-	rq = blk_mq_tag_to_rq(nvme_tcp_tagset(queue), pdu->command_id);
-	if (!rq) {
-		dev_err(queue->ctrl->ctrl.device,
-			"queue %d tag %#x not found\n",
-			nvme_tcp_queue_id(queue), pdu->command_id);
-		return -ENOENT;
-	}
-	req = blk_mq_rq_to_pdu(rq);
+	struct request *rq =
+		nvme_cid_to_rq(nvme_tcp_tagset(queue), pdu->command_id);
+	struct nvme_tcp_request *req = blk_mq_rq_to_pdu(rq);
 
 	while (true) {
 		int recv_len, ret;
@@ -804,8 +796,8 @@ static int nvme_tcp_recv_ddgst(struct nvme_tcp_queue *queue,
 	}
 
 	if (pdu->hdr.flags & NVME_TCP_F_DATA_SUCCESS) {
-		struct request *rq = blk_mq_tag_to_rq(nvme_tcp_tagset(queue),
-						pdu->command_id);
+		struct request *rq = nvme_cid_to_rq(nvme_tcp_tagset(queue),
+					pdu->command_id);
 
 		nvme_tcp_end_request(rq, NVME_SC_SUCCESS);
 		queue->nr_cqe++;
@@ -1228,6 +1220,7 @@ static void nvme_tcp_free_queue(struct nvme_ctrl *nctrl, int qid)
 
 	sock_release(queue->sock);
 	kfree(queue->pdu);
+	mutex_destroy(&queue->send_mutex);
 	mutex_destroy(&queue->queue_lock);
 }
 
@@ -1533,6 +1526,7 @@ err_sock:
 	sock_release(queue->sock);
 	queue->sock = NULL;
 err_destroy_mutex:
+	mutex_destroy(&queue->send_mutex);
 	mutex_destroy(&queue->queue_lock);
 	return ret;
 }
@@ -1769,13 +1763,13 @@ static int nvme_tcp_alloc_io_queues(struct nvme_ctrl *ctrl)
 	if (ret)
 		return ret;
 
-	ctrl->queue_count = nr_io_queues + 1;
-	if (ctrl->queue_count < 2) {
+	if (nr_io_queues == 0) {
 		dev_err(ctrl->device,
 			"unable to set any I/O queues\n");
 		return -ENOMEM;
 	}
 
+	ctrl->queue_count = nr_io_queues + 1;
 	dev_info(ctrl->device,
 		"creating %d I/O queues.\n", nr_io_queues);
 
diff --git a/drivers/nvme/host/trace.c b/drivers/nvme/host/trace.c
index 6543015b6121..2a89c5aa0790 100644
--- a/drivers/nvme/host/trace.c
+++ b/drivers/nvme/host/trace.c
@@ -72,6 +72,20 @@ static const char *nvme_trace_admin_identify(struct trace_seq *p, u8 *cdw10)
 	return ret;
 }
 
+static const char *nvme_trace_admin_set_features(struct trace_seq *p,
+						 u8 *cdw10)
+{
+	const char *ret = trace_seq_buffer_ptr(p);
+	u8 fid = cdw10[0];
+	u8 sv = cdw10[3] & 0x8;
+	u32 cdw11 = get_unaligned_le32(cdw10 + 4);
+
+	trace_seq_printf(p, "fid=0x%x, sv=0x%x, cdw11=0x%x", fid, sv, cdw11);
+	trace_seq_putc(p, 0);
+
+	return ret;
+}
+
 static const char *nvme_trace_admin_get_features(struct trace_seq *p,
 						 u8 *cdw10)
 {
@@ -80,7 +94,7 @@ static const char *nvme_trace_admin_get_features(struct trace_seq *p,
 	u8 sel = cdw10[1] & 0x7;
 	u32 cdw11 = get_unaligned_le32(cdw10 + 4);
 
-	trace_seq_printf(p, "fid=0x%x sel=0x%x cdw11=0x%x", fid, sel, cdw11);
+	trace_seq_printf(p, "fid=0x%x, sel=0x%x, cdw11=0x%x", fid, sel, cdw11);
 	trace_seq_putc(p, 0);
 
 	return ret;
@@ -201,6 +215,8 @@ const char *nvme_trace_parse_admin_cmd(struct trace_seq *p,
 		return nvme_trace_create_cq(p, cdw10);
 	case nvme_admin_identify:
 		return nvme_trace_admin_identify(p, cdw10);
+	case nvme_admin_set_features:
+		return nvme_trace_admin_set_features(p, cdw10);
 	case nvme_admin_get_features:
 		return nvme_trace_admin_get_features(p, cdw10);
 	case nvme_admin_get_lba_status:
diff --git a/drivers/nvme/target/Kconfig b/drivers/nvme/target/Kconfig
index 4be2ececbc45..973561c93888 100644
--- a/drivers/nvme/target/Kconfig
+++ b/drivers/nvme/target/Kconfig
@@ -31,7 +31,6 @@ config NVME_TARGET_PASSTHRU
 config NVME_TARGET_LOOP
 	tristate "NVMe loopback device support"
 	depends on NVME_TARGET
-	select NVME_CORE
 	select NVME_FABRICS
 	select SG_POOL
 	help
@@ -65,7 +64,6 @@ config NVME_TARGET_FC
 config NVME_TARGET_FCLOOP
 	tristate "NVMe over Fabrics FC Transport Loopback Test driver"
 	depends on NVME_TARGET
-	select NVME_CORE
 	select NVME_FABRICS
 	select SG_POOL
 	depends on NVME_FC
diff --git a/drivers/nvme/target/core.c b/drivers/nvme/target/core.c
index ac7210a3ea1c..66d05eecc2a9 100644
--- a/drivers/nvme/target/core.c
+++ b/drivers/nvme/target/core.c
@@ -802,6 +802,7 @@ void nvmet_sq_destroy(struct nvmet_sq *sq)
 		 * controller teardown as a result of a keep-alive expiration.
 		 */
 		ctrl->reset_tbkas = true;
+		sq->ctrl->sqs[sq->qid] = NULL;
 		nvmet_ctrl_put(ctrl);
 		sq->ctrl = NULL; /* allows reusing the queue later */
 	}
diff --git a/drivers/nvme/target/fabrics-cmd.c b/drivers/nvme/target/fabrics-cmd.c
index 7d0f3523fdab..7d0454cee920 100644
--- a/drivers/nvme/target/fabrics-cmd.c
+++ b/drivers/nvme/target/fabrics-cmd.c
@@ -109,21 +109,38 @@ static u16 nvmet_install_queue(struct nvmet_ctrl *ctrl, struct nvmet_req *req)
 	u16 qid = le16_to_cpu(c->qid);
 	u16 sqsize = le16_to_cpu(c->sqsize);
 	struct nvmet_ctrl *old;
+	u16 mqes = NVME_CAP_MQES(ctrl->cap);
 	u16 ret;
 
-	old = cmpxchg(&req->sq->ctrl, NULL, ctrl);
-	if (old) {
-		pr_warn("queue already connected!\n");
-		req->error_loc = offsetof(struct nvmf_connect_command, opcode);
-		return NVME_SC_CONNECT_CTRL_BUSY | NVME_SC_DNR;
-	}
 	if (!sqsize) {
 		pr_warn("queue size zero!\n");
 		req->error_loc = offsetof(struct nvmf_connect_command, sqsize);
+		req->cqe->result.u32 = IPO_IATTR_CONNECT_SQE(sqsize);
 		ret = NVME_SC_CONNECT_INVALID_PARAM | NVME_SC_DNR;
 		goto err;
 	}
 
+	if (ctrl->sqs[qid] != NULL) {
+		pr_warn("qid %u has already been created\n", qid);
+		req->error_loc = offsetof(struct nvmf_connect_command, qid);
+		return NVME_SC_CMD_SEQ_ERROR | NVME_SC_DNR;
+	}
+
+	if (sqsize > mqes) {
+		pr_warn("sqsize %u is larger than MQES supported %u cntlid %d\n",
+				sqsize, mqes, ctrl->cntlid);
+		req->error_loc = offsetof(struct nvmf_connect_command, sqsize);
+		req->cqe->result.u32 = IPO_IATTR_CONNECT_SQE(sqsize);
+		return NVME_SC_CONNECT_INVALID_PARAM | NVME_SC_DNR;
+	}
+
+	old = cmpxchg(&req->sq->ctrl, NULL, ctrl);
+	if (old) {
+		pr_warn("queue already connected!\n");
+		req->error_loc = offsetof(struct nvmf_connect_command, opcode);
+		return NVME_SC_CONNECT_CTRL_BUSY | NVME_SC_DNR;
+	}
+
 	/* note: convert queue size from 0's-based value to 1's-based value */
 	nvmet_cq_setup(ctrl, req->cq, qid, sqsize + 1);
 	nvmet_sq_setup(ctrl, req->sq, qid, sqsize + 1);
@@ -138,6 +155,7 @@ static u16 nvmet_install_queue(struct nvmet_ctrl *ctrl, struct nvmet_req *req)
 		if (ret) {
 			pr_err("failed to install queue %d cntlid %d ret %x\n",
 				qid, ctrl->cntlid, ret);
+			ctrl->sqs[qid] = NULL;
 			goto err;
 		}
 	}
@@ -260,11 +278,11 @@ static void nvmet_execute_io_connect(struct nvmet_req *req)
 	}
 
 	status = nvmet_install_queue(ctrl, req);
-	if (status) {
-		/* pass back cntlid that had the issue of installing queue */
-		req->cqe->result.u16 = cpu_to_le16(ctrl->cntlid);
+	if (status)
 		goto out_ctrl_put;
-	}
+
+	/* pass back cntlid for successful completion */
+	req->cqe->result.u16 = cpu_to_le16(ctrl->cntlid);
 
 	pr_debug("adding queue %d to ctrl %d.\n", qid, ctrl->cntlid);
 
diff --git a/drivers/nvme/target/loop.c b/drivers/nvme/target/loop.c
index 3a17a7e26bbf..0285ccc7541f 100644
--- a/drivers/nvme/target/loop.c
+++ b/drivers/nvme/target/loop.c
@@ -107,10 +107,10 @@ static void nvme_loop_queue_response(struct nvmet_req *req)
 	} else {
 		struct request *rq;
 
-		rq = blk_mq_tag_to_rq(nvme_loop_tagset(queue), cqe->command_id);
+		rq = nvme_find_rq(nvme_loop_tagset(queue), cqe->command_id);
 		if (!rq) {
 			dev_err(queue->ctrl->ctrl.device,
-				"tag 0x%x on queue %d not found\n",
+				"got bad command_id %#x on queue %d\n",
 				cqe->command_id, nvme_loop_queue_idx(queue));
 			return;
 		}
diff --git a/drivers/nvme/target/trace.c b/drivers/nvme/target/trace.c
index 1373a3c67962..bff454d46255 100644
--- a/drivers/nvme/target/trace.c
+++ b/drivers/nvme/target/trace.c
@@ -27,7 +27,7 @@ static const char *nvmet_trace_admin_get_features(struct trace_seq *p,
 	u8 sel = cdw10[1] & 0x7;
 	u32 cdw11 = get_unaligned_le32(cdw10 + 4);
 
-	trace_seq_printf(p, "fid=0x%x sel=0x%x cdw11=0x%x", fid, sel, cdw11);
+	trace_seq_printf(p, "fid=0x%x, sel=0x%x, cdw11=0x%x", fid, sel, cdw11);
 	trace_seq_putc(p, 0);
 
 	return ret;
@@ -49,6 +49,20 @@ static const char *nvmet_trace_get_lba_status(struct trace_seq *p,
 	return ret;
 }
 
+static const char *nvmet_trace_admin_set_features(struct trace_seq *p,
+						 u8 *cdw10)
+{
+	const char *ret = trace_seq_buffer_ptr(p);
+	u8 fid = cdw10[0];
+	u8 sv = cdw10[3] & 0x8;
+	u32 cdw11 = get_unaligned_le32(cdw10 + 4);
+
+	trace_seq_printf(p, "fid=0x%x, sv=0x%x, cdw11=0x%x", fid, sv, cdw11);
+	trace_seq_putc(p, 0);
+
+	return ret;
+}
+
 static const char *nvmet_trace_read_write(struct trace_seq *p, u8 *cdw10)
 {
 	const char *ret = trace_seq_buffer_ptr(p);
@@ -94,6 +108,8 @@ const char *nvmet_trace_parse_admin_cmd(struct trace_seq *p,
 	switch (opcode) {
 	case nvme_admin_identify:
 		return nvmet_trace_admin_identify(p, cdw10);
+	case nvme_admin_set_features:
+		return nvmet_trace_admin_set_features(p, cdw10);
 	case nvme_admin_get_features:
 		return nvmet_trace_admin_get_features(p, cdw10);
 	case nvme_admin_get_lba_status:
diff --git a/drivers/nvme/target/zns.c b/drivers/nvme/target/zns.c
index 17f8b7a45f21..46bc30fe85d2 100644
--- a/drivers/nvme/target/zns.c
+++ b/drivers/nvme/target/zns.c
@@ -115,14 +115,11 @@ void nvmet_execute_identify_cns_cs_ns(struct nvmet_req *req)
 	}
 
 	status = nvmet_req_find_ns(req);
-	if (status) {
-		status = NVME_SC_INTERNAL;
+	if (status)
 		goto done;
-	}
 
 	if (!bdev_is_zoned(req->ns->bdev)) {
 		req->error_loc = offsetof(struct nvme_identify, nsid);
-		status = NVME_SC_INVALID_NS | NVME_SC_DNR;
 		goto done;
 	}