Merge branch 'disintegrate-asm-generic' of git://git.infradead.org/users/dhowells/linux-headers into asm-generic

Patches from David Howells <dhowells@redhat.com>:

This is to complete part of the UAPI disintegration for which the
preparatory patches were pulled recently.

Note that there are some fixup patches which are at the base of the
branch aimed at you, plus all arches get the asm-generic branch merged in too.

* 'disintegrate-asm-generic' of git://git.infradead.org/users/dhowells/linux-headers:
  UAPI: (Scripted) Disintegrate include/asm-generic
  UAPI: Fix conditional header installation handling (notably kvm_para.h on m68k)
  c6x: remove c6x signal.h
  UAPI: Split compound conditionals containing __KERNEL__ in Arm64
  UAPI: Fix the guards on various asm/unistd.h files

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 333 insertions, 19 deletions

diff --git a/drivers/scsi/ibmvscsi/ibmvscsi.c b/drivers/scsi/ibmvscsi/ibmvscsi.c
index 3a6c4742951e..ef9a54c7da67 100644
--- a/drivers/scsi/ibmvscsi/ibmvscsi.c
+++ b/drivers/scsi/ibmvscsi/ibmvscsi.c
@@ -93,13 +93,13 @@ static int max_requests = IBMVSCSI_MAX_REQUESTS_DEFAULT;
 static int max_events = IBMVSCSI_MAX_REQUESTS_DEFAULT + 2;
 static int fast_fail = 1;
 static int client_reserve = 1;
+static char partition_name[97] = "UNKNOWN";
+static unsigned int partition_number = -1;
 
 static struct scsi_transport_template *ibmvscsi_transport_template;
 
 #define IBMVSCSI_VERSION "1.5.9"
 
-static struct ibmvscsi_ops *ibmvscsi_ops;
-
 MODULE_DESCRIPTION("IBM Virtual SCSI");
 MODULE_AUTHOR("Dave Boutcher");
 MODULE_LICENSE("GPL");
@@ -118,6 +118,316 @@ MODULE_PARM_DESC(fast_fail, "Enable fast fail. [Default=1]");
 module_param_named(client_reserve, client_reserve, int, S_IRUGO );
 MODULE_PARM_DESC(client_reserve, "Attempt client managed reserve/release");
 
+static void ibmvscsi_handle_crq(struct viosrp_crq *crq,
+				struct ibmvscsi_host_data *hostdata);
+
+/* ------------------------------------------------------------
+ * Routines for managing the command/response queue
+ */
+/**
+ * ibmvscsi_handle_event: - Interrupt handler for crq events
+ * @irq:	number of irq to handle, not used
+ * @dev_instance: ibmvscsi_host_data of host that received interrupt
+ *
+ * Disables interrupts and schedules srp_task
+ * Always returns IRQ_HANDLED
+ */
+static irqreturn_t ibmvscsi_handle_event(int irq, void *dev_instance)
+{
+	struct ibmvscsi_host_data *hostdata =
+	    (struct ibmvscsi_host_data *)dev_instance;
+	vio_disable_interrupts(to_vio_dev(hostdata->dev));
+	tasklet_schedule(&hostdata->srp_task);
+	return IRQ_HANDLED;
+}
+
+/**
+ * release_crq_queue: - Deallocates data and unregisters CRQ
+ * @queue:	crq_queue to initialize and register
+ * @host_data:	ibmvscsi_host_data of host
+ *
+ * Frees irq, deallocates a page for messages, unmaps dma, and unregisters
+ * the crq with the hypervisor.
+ */
+static void ibmvscsi_release_crq_queue(struct crq_queue *queue,
+				       struct ibmvscsi_host_data *hostdata,
+				       int max_requests)
+{
+	long rc = 0;
+	struct vio_dev *vdev = to_vio_dev(hostdata->dev);
+	free_irq(vdev->irq, (void *)hostdata);
+	tasklet_kill(&hostdata->srp_task);
+	do {
+		if (rc)
+			msleep(100);
+		rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
+	} while ((rc == H_BUSY) || (H_IS_LONG_BUSY(rc)));
+	dma_unmap_single(hostdata->dev,
+			 queue->msg_token,
+			 queue->size * sizeof(*queue->msgs), DMA_BIDIRECTIONAL);
+	free_page((unsigned long)queue->msgs);
+}
+
+/**
+ * crq_queue_next_crq: - Returns the next entry in message queue
+ * @queue:	crq_queue to use
+ *
+ * Returns pointer to next entry in queue, or NULL if there are no new
+ * entried in the CRQ.
+ */
+static struct viosrp_crq *crq_queue_next_crq(struct crq_queue *queue)
+{
+	struct viosrp_crq *crq;
+	unsigned long flags;
+
+	spin_lock_irqsave(&queue->lock, flags);
+	crq = &queue->msgs[queue->cur];
+	if (crq->valid & 0x80) {
+		if (++queue->cur == queue->size)
+			queue->cur = 0;
+	} else
+		crq = NULL;
+	spin_unlock_irqrestore(&queue->lock, flags);
+
+	return crq;
+}
+
+/**
+ * ibmvscsi_send_crq: - Send a CRQ
+ * @hostdata:	the adapter
+ * @word1:	the first 64 bits of the data
+ * @word2:	the second 64 bits of the data
+ */
+static int ibmvscsi_send_crq(struct ibmvscsi_host_data *hostdata,
+			     u64 word1, u64 word2)
+{
+	struct vio_dev *vdev = to_vio_dev(hostdata->dev);
+
+	return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2);
+}
+
+/**
+ * ibmvscsi_task: - Process srps asynchronously
+ * @data:	ibmvscsi_host_data of host
+ */
+static void ibmvscsi_task(void *data)
+{
+	struct ibmvscsi_host_data *hostdata = (struct ibmvscsi_host_data *)data;
+	struct vio_dev *vdev = to_vio_dev(hostdata->dev);
+	struct viosrp_crq *crq;
+	int done = 0;
+
+	while (!done) {
+		/* Pull all the valid messages off the CRQ */
+		while ((crq = crq_queue_next_crq(&hostdata->queue)) != NULL) {
+			ibmvscsi_handle_crq(crq, hostdata);
+			crq->valid = 0x00;
+		}
+
+		vio_enable_interrupts(vdev);
+		crq = crq_queue_next_crq(&hostdata->queue);
+		if (crq != NULL) {
+			vio_disable_interrupts(vdev);
+			ibmvscsi_handle_crq(crq, hostdata);
+			crq->valid = 0x00;
+		} else {
+			done = 1;
+		}
+	}
+}
+
+static void gather_partition_info(void)
+{
+	struct device_node *rootdn;
+
+	const char *ppartition_name;
+	const unsigned int *p_number_ptr;
+
+	/* Retrieve information about this partition */
+	rootdn = of_find_node_by_path("/");
+	if (!rootdn) {
+		return;
+	}
+
+	ppartition_name = of_get_property(rootdn, "ibm,partition-name", NULL);
+	if (ppartition_name)
+		strncpy(partition_name, ppartition_name,
+				sizeof(partition_name));
+	p_number_ptr = of_get_property(rootdn, "ibm,partition-no", NULL);
+	if (p_number_ptr)
+		partition_number = *p_number_ptr;
+	of_node_put(rootdn);
+}
+
+static void set_adapter_info(struct ibmvscsi_host_data *hostdata)
+{
+	memset(&hostdata->madapter_info, 0x00,
+			sizeof(hostdata->madapter_info));
+
+	dev_info(hostdata->dev, "SRP_VERSION: %s\n", SRP_VERSION);
+	strcpy(hostdata->madapter_info.srp_version, SRP_VERSION);
+
+	strncpy(hostdata->madapter_info.partition_name, partition_name,
+			sizeof(hostdata->madapter_info.partition_name));
+
+	hostdata->madapter_info.partition_number = partition_number;
+
+	hostdata->madapter_info.mad_version = 1;
+	hostdata->madapter_info.os_type = 2;
+}
+
+/**
+ * reset_crq_queue: - resets a crq after a failure
+ * @queue:	crq_queue to initialize and register
+ * @hostdata:	ibmvscsi_host_data of host
+ *
+ */
+static int ibmvscsi_reset_crq_queue(struct crq_queue *queue,
+				    struct ibmvscsi_host_data *hostdata)
+{
+	int rc = 0;
+	struct vio_dev *vdev = to_vio_dev(hostdata->dev);
+
+	/* Close the CRQ */
+	do {
+		if (rc)
+			msleep(100);
+		rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
+	} while ((rc == H_BUSY) || (H_IS_LONG_BUSY(rc)));
+
+	/* Clean out the queue */
+	memset(queue->msgs, 0x00, PAGE_SIZE);
+	queue->cur = 0;
+
+	set_adapter_info(hostdata);
+
+	/* And re-open it again */
+	rc = plpar_hcall_norets(H_REG_CRQ,
+				vdev->unit_address,
+				queue->msg_token, PAGE_SIZE);
+	if (rc == 2) {
+		/* Adapter is good, but other end is not ready */
+		dev_warn(hostdata->dev, "Partner adapter not ready\n");
+	} else if (rc != 0) {
+		dev_warn(hostdata->dev, "couldn't register crq--rc 0x%x\n", rc);
+	}
+	return rc;
+}
+
+/**
+ * initialize_crq_queue: - Initializes and registers CRQ with hypervisor
+ * @queue:	crq_queue to initialize and register
+ * @hostdata:	ibmvscsi_host_data of host
+ *
+ * Allocates a page for messages, maps it for dma, and registers
+ * the crq with the hypervisor.
+ * Returns zero on success.
+ */
+static int ibmvscsi_init_crq_queue(struct crq_queue *queue,
+				   struct ibmvscsi_host_data *hostdata,
+				   int max_requests)
+{
+	int rc;
+	int retrc;
+	struct vio_dev *vdev = to_vio_dev(hostdata->dev);
+
+	queue->msgs = (struct viosrp_crq *)get_zeroed_page(GFP_KERNEL);
+
+	if (!queue->msgs)
+		goto malloc_failed;
+	queue->size = PAGE_SIZE / sizeof(*queue->msgs);
+
+	queue->msg_token = dma_map_single(hostdata->dev, queue->msgs,
+					  queue->size * sizeof(*queue->msgs),
+					  DMA_BIDIRECTIONAL);
+
+	if (dma_mapping_error(hostdata->dev, queue->msg_token))
+		goto map_failed;
+
+	gather_partition_info();
+	set_adapter_info(hostdata);
+
+	retrc = rc = plpar_hcall_norets(H_REG_CRQ,
+				vdev->unit_address,
+				queue->msg_token, PAGE_SIZE);
+	if (rc == H_RESOURCE)
+		/* maybe kexecing and resource is busy. try a reset */
+		rc = ibmvscsi_reset_crq_queue(queue,
+					      hostdata);
+
+	if (rc == 2) {
+		/* Adapter is good, but other end is not ready */
+		dev_warn(hostdata->dev, "Partner adapter not ready\n");
+		retrc = 0;
+	} else if (rc != 0) {
+		dev_warn(hostdata->dev, "Error %d opening adapter\n", rc);
+		goto reg_crq_failed;
+	}
+
+	queue->cur = 0;
+	spin_lock_init(&queue->lock);
+
+	tasklet_init(&hostdata->srp_task, (void *)ibmvscsi_task,
+		     (unsigned long)hostdata);
+
+	if (request_irq(vdev->irq,
+			ibmvscsi_handle_event,
+			0, "ibmvscsi", (void *)hostdata) != 0) {
+		dev_err(hostdata->dev, "couldn't register irq 0x%x\n",
+			vdev->irq);
+		goto req_irq_failed;
+	}
+
+	rc = vio_enable_interrupts(vdev);
+	if (rc != 0) {
+		dev_err(hostdata->dev, "Error %d enabling interrupts!!!\n", rc);
+		goto req_irq_failed;
+	}
+
+	return retrc;
+
+      req_irq_failed:
+	tasklet_kill(&hostdata->srp_task);
+	rc = 0;
+	do {
+		if (rc)
+			msleep(100);
+		rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
+	} while ((rc == H_BUSY) || (H_IS_LONG_BUSY(rc)));
+      reg_crq_failed:
+	dma_unmap_single(hostdata->dev,
+			 queue->msg_token,
+			 queue->size * sizeof(*queue->msgs), DMA_BIDIRECTIONAL);
+      map_failed:
+	free_page((unsigned long)queue->msgs);
+      malloc_failed:
+	return -1;
+}
+
+/**
+ * reenable_crq_queue: - reenables a crq after
+ * @queue:	crq_queue to initialize and register
+ * @hostdata:	ibmvscsi_host_data of host
+ *
+ */
+static int ibmvscsi_reenable_crq_queue(struct crq_queue *queue,
+				       struct ibmvscsi_host_data *hostdata)
+{
+	int rc = 0;
+	struct vio_dev *vdev = to_vio_dev(hostdata->dev);
+
+	/* Re-enable the CRQ */
+	do {
+		if (rc)
+			msleep(100);
+		rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
+	} while ((rc == H_IN_PROGRESS) || (rc == H_BUSY) || (H_IS_LONG_BUSY(rc)));
+
+	if (rc)
+		dev_err(hostdata->dev, "Error %d enabling adapter\n", rc);
+	return rc;
+}
+
 /* ------------------------------------------------------------
  * Routines for the event pool and event structs
  */
@@ -611,7 +921,7 @@ static int ibmvscsi_send_srp_event(struct srp_event_struct *evt_struct,
 	}
 
 	if ((rc =
-	     ibmvscsi_ops->send_crq(hostdata, crq_as_u64[0], crq_as_u64[1])) != 0) {
+	     ibmvscsi_send_crq(hostdata, crq_as_u64[0], crq_as_u64[1])) != 0) {
 		list_del(&evt_struct->list);
 		del_timer(&evt_struct->timer);
 
@@ -1420,8 +1730,8 @@ static int ibmvscsi_eh_host_reset_handler(struct scsi_cmnd *cmd)
  * @hostdata:	ibmvscsi_host_data of host
  *
 */
-void ibmvscsi_handle_crq(struct viosrp_crq *crq,
-			 struct ibmvscsi_host_data *hostdata)
+static void ibmvscsi_handle_crq(struct viosrp_crq *crq,
+				struct ibmvscsi_host_data *hostdata)
 {
 	long rc;
 	unsigned long flags;
@@ -1433,8 +1743,8 @@ void ibmvscsi_handle_crq(struct viosrp_crq *crq,
 		case 0x01:	/* Initialization message */
 			dev_info(hostdata->dev, "partner initialized\n");
 			/* Send back a response */
-			if ((rc = ibmvscsi_ops->send_crq(hostdata,
-							 0xC002000000000000LL, 0)) == 0) {
+			rc = ibmvscsi_send_crq(hostdata, 0xC002000000000000LL, 0);
+			if (rc == 0) {
 				/* Now login */
 				init_adapter(hostdata);
 			} else {
@@ -1541,6 +1851,9 @@ static int ibmvscsi_do_host_config(struct ibmvscsi_host_data *hostdata,
 
 	host_config = &evt_struct->iu.mad.host_config;
 
+	/* The transport length field is only 16-bit */
+	length = min(0xffff, length);
+
 	/* Set up a lun reset SRP command */
 	memset(host_config, 0x00, sizeof(*host_config));
 	host_config->common.type = VIOSRP_HOST_CONFIG_TYPE;
@@ -1840,17 +2153,17 @@ static void ibmvscsi_do_work(struct ibmvscsi_host_data *hostdata)
 		smp_rmb();
 		hostdata->reset_crq = 0;
 
-		rc = ibmvscsi_ops->reset_crq_queue(&hostdata->queue, hostdata);
+		rc = ibmvscsi_reset_crq_queue(&hostdata->queue, hostdata);
 		if (!rc)
-			rc = ibmvscsi_ops->send_crq(hostdata, 0xC001000000000000LL, 0);
+			rc = ibmvscsi_send_crq(hostdata, 0xC001000000000000LL, 0);
 		vio_enable_interrupts(to_vio_dev(hostdata->dev));
 	} else if (hostdata->reenable_crq) {
 		smp_rmb();
 		action = "enable";
-		rc = ibmvscsi_ops->reenable_crq_queue(&hostdata->queue, hostdata);
+		rc = ibmvscsi_reenable_crq_queue(&hostdata->queue, hostdata);
 		hostdata->reenable_crq = 0;
 		if (!rc)
-			rc = ibmvscsi_ops->send_crq(hostdata, 0xC001000000000000LL, 0);
+			rc = ibmvscsi_send_crq(hostdata, 0xC001000000000000LL, 0);
 	} else
 		return;
 
@@ -1944,7 +2257,7 @@ static int ibmvscsi_probe(struct vio_dev *vdev, const struct vio_device_id *id)
 		goto init_crq_failed;
 	}
 
-	rc = ibmvscsi_ops->init_crq_queue(&hostdata->queue, hostdata, max_events);
+	rc = ibmvscsi_init_crq_queue(&hostdata->queue, hostdata, max_events);
 	if (rc != 0 && rc != H_RESOURCE) {
 		dev_err(&vdev->dev, "couldn't initialize crq. rc=%d\n", rc);
 		goto kill_kthread;
@@ -1974,7 +2287,7 @@ static int ibmvscsi_probe(struct vio_dev *vdev, const struct vio_device_id *id)
 	 * to fail if the other end is not acive.  In that case we don't
 	 * want to scan
 	 */
-	if (ibmvscsi_ops->send_crq(hostdata, 0xC001000000000000LL, 0) == 0
+	if (ibmvscsi_send_crq(hostdata, 0xC001000000000000LL, 0) == 0
 	    || rc == H_RESOURCE) {
 		/*
 		 * Wait around max init_timeout secs for the adapter to finish
@@ -2002,7 +2315,7 @@ static int ibmvscsi_probe(struct vio_dev *vdev, const struct vio_device_id *id)
       add_host_failed:
 	release_event_pool(&hostdata->pool, hostdata);
       init_pool_failed:
-	ibmvscsi_ops->release_crq_queue(&hostdata->queue, hostdata, max_events);
+	ibmvscsi_release_crq_queue(&hostdata->queue, hostdata, max_events);
       kill_kthread:
       kthread_stop(hostdata->work_thread);
       init_crq_failed:
@@ -2018,7 +2331,7 @@ static int ibmvscsi_remove(struct vio_dev *vdev)
 	struct ibmvscsi_host_data *hostdata = dev_get_drvdata(&vdev->dev);
 	unmap_persist_bufs(hostdata);
 	release_event_pool(&hostdata->pool, hostdata);
-	ibmvscsi_ops->release_crq_queue(&hostdata->queue, hostdata,
+	ibmvscsi_release_crq_queue(&hostdata->queue, hostdata,
 					max_events);
 
 	kthread_stop(hostdata->work_thread);
@@ -2039,7 +2352,10 @@ static int ibmvscsi_remove(struct vio_dev *vdev)
 static int ibmvscsi_resume(struct device *dev)
 {
 	struct ibmvscsi_host_data *hostdata = dev_get_drvdata(dev);
-	return ibmvscsi_ops->resume(hostdata);
+	vio_disable_interrupts(to_vio_dev(hostdata->dev));
+	tasklet_schedule(&hostdata->srp_task);
+
+	return 0;
 }
 
 /**
@@ -2076,9 +2392,7 @@ int __init ibmvscsi_module_init(void)
 	driver_template.can_queue = max_requests;
 	max_events = max_requests + 2;
 
-	if (firmware_has_feature(FW_FEATURE_VIO))
-		ibmvscsi_ops = &rpavscsi_ops;
-	else
+	if (!firmware_has_feature(FW_FEATURE_VIO))
 		return -ENODEV;
 
 	ibmvscsi_transport_template =