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-rw-r--r--drivers/infiniband/core/cma.c21
-rw-r--r--drivers/infiniband/core/mad.c5
-rw-r--r--drivers/infiniband/core/sa_query.c32
-rw-r--r--drivers/infiniband/core/uverbs_cmd.c27
-rw-r--r--drivers/infiniband/core/verbs.c43
-rw-r--r--drivers/infiniband/hw/mlx4/main.c2
-rw-r--r--drivers/infiniband/hw/mlx4/qp.c19
-rw-r--r--drivers/infiniband/hw/mlx4/srq.c13
-rw-r--r--drivers/infiniband/hw/mlx5/mr.c14
-rw-r--r--drivers/infiniband/hw/ocrdma/ocrdma.h10
-rw-r--r--drivers/infiniband/hw/ocrdma/ocrdma_hw.c49
-rw-r--r--drivers/infiniband/hw/ocrdma/ocrdma_hw.h4
-rw-r--r--drivers/infiniband/hw/ocrdma/ocrdma_main.c57
-rw-r--r--drivers/infiniband/hw/ocrdma/ocrdma_sli.h49
-rw-r--r--drivers/infiniband/hw/ocrdma/ocrdma_verbs.c2
-rw-r--r--drivers/infiniband/hw/qib/qib_qsfp.c4
-rw-r--r--drivers/infiniband/hw/qib/qib_verbs.h2
-rw-r--r--drivers/infiniband/ulp/iser/iser_verbs.c2
-rw-r--r--drivers/infiniband/ulp/isert/ib_isert.c13
-rw-r--r--drivers/infiniband/ulp/srp/ib_srp.c48
-rw-r--r--drivers/infiniband/ulp/srp/ib_srp.h5
21 files changed, 264 insertions, 157 deletions
diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c
index 944cd90417bc..2d762a2ecd81 100644
--- a/drivers/infiniband/core/cma.c
+++ b/drivers/infiniband/core/cma.c
@@ -1126,10 +1126,7 @@ static bool validate_ipv4_net_dev(struct net_device *net_dev,
rcu_read_lock();
err = fib_lookup(dev_net(net_dev), &fl4, &res, 0);
- if (err)
- return false;
-
- ret = FIB_RES_DEV(res) == net_dev;
+ ret = err == 0 && FIB_RES_DEV(res) == net_dev;
rcu_read_unlock();
return ret;
@@ -1268,15 +1265,17 @@ static bool cma_protocol_roce(const struct rdma_cm_id *id)
return cma_protocol_roce_dev_port(device, port_num);
}
-static bool cma_match_net_dev(const struct rdma_id_private *id_priv,
- const struct net_device *net_dev)
+static bool cma_match_net_dev(const struct rdma_cm_id *id,
+ const struct net_device *net_dev,
+ u8 port_num)
{
- const struct rdma_addr *addr = &id_priv->id.route.addr;
+ const struct rdma_addr *addr = &id->route.addr;
if (!net_dev)
/* This request is an AF_IB request or a RoCE request */
- return addr->src_addr.ss_family == AF_IB ||
- cma_protocol_roce(&id_priv->id);
+ return (!id->port_num || id->port_num == port_num) &&
+ (addr->src_addr.ss_family == AF_IB ||
+ cma_protocol_roce_dev_port(id->device, port_num));
return !addr->dev_addr.bound_dev_if ||
(net_eq(dev_net(net_dev), addr->dev_addr.net) &&
@@ -1298,13 +1297,13 @@ static struct rdma_id_private *cma_find_listener(
hlist_for_each_entry(id_priv, &bind_list->owners, node) {
if (cma_match_private_data(id_priv, ib_event->private_data)) {
if (id_priv->id.device == cm_id->device &&
- cma_match_net_dev(id_priv, net_dev))
+ cma_match_net_dev(&id_priv->id, net_dev, req->port))
return id_priv;
list_for_each_entry(id_priv_dev,
&id_priv->listen_list,
listen_list) {
if (id_priv_dev->id.device == cm_id->device &&
- cma_match_net_dev(id_priv_dev, net_dev))
+ cma_match_net_dev(&id_priv_dev->id, net_dev, req->port))
return id_priv_dev;
}
}
diff --git a/drivers/infiniband/core/mad.c b/drivers/infiniband/core/mad.c
index 8d8af7a41a30..2281de122038 100644
--- a/drivers/infiniband/core/mad.c
+++ b/drivers/infiniband/core/mad.c
@@ -1811,6 +1811,11 @@ static int validate_mad(const struct ib_mad_hdr *mad_hdr,
if (qp_num == 0)
valid = 1;
} else {
+ /* CM attributes other than ClassPortInfo only use Send method */
+ if ((mad_hdr->mgmt_class == IB_MGMT_CLASS_CM) &&
+ (mad_hdr->attr_id != IB_MGMT_CLASSPORTINFO_ATTR_ID) &&
+ (mad_hdr->method != IB_MGMT_METHOD_SEND))
+ goto out;
/* Filter GSI packets sent to QP0 */
if (qp_num != 0)
valid = 1;
diff --git a/drivers/infiniband/core/sa_query.c b/drivers/infiniband/core/sa_query.c
index 2aba774f835b..a95a32ba596e 100644
--- a/drivers/infiniband/core/sa_query.c
+++ b/drivers/infiniband/core/sa_query.c
@@ -512,7 +512,7 @@ static int ib_nl_get_path_rec_attrs_len(ib_sa_comp_mask comp_mask)
return len;
}
-static int ib_nl_send_msg(struct ib_sa_query *query)
+static int ib_nl_send_msg(struct ib_sa_query *query, gfp_t gfp_mask)
{
struct sk_buff *skb = NULL;
struct nlmsghdr *nlh;
@@ -526,7 +526,7 @@ static int ib_nl_send_msg(struct ib_sa_query *query)
if (len <= 0)
return -EMSGSIZE;
- skb = nlmsg_new(len, GFP_KERNEL);
+ skb = nlmsg_new(len, gfp_mask);
if (!skb)
return -ENOMEM;
@@ -544,7 +544,7 @@ static int ib_nl_send_msg(struct ib_sa_query *query)
/* Repair the nlmsg header length */
nlmsg_end(skb, nlh);
- ret = ibnl_multicast(skb, nlh, RDMA_NL_GROUP_LS, GFP_KERNEL);
+ ret = ibnl_multicast(skb, nlh, RDMA_NL_GROUP_LS, gfp_mask);
if (!ret)
ret = len;
else
@@ -553,7 +553,7 @@ static int ib_nl_send_msg(struct ib_sa_query *query)
return ret;
}
-static int ib_nl_make_request(struct ib_sa_query *query)
+static int ib_nl_make_request(struct ib_sa_query *query, gfp_t gfp_mask)
{
unsigned long flags;
unsigned long delay;
@@ -562,25 +562,27 @@ static int ib_nl_make_request(struct ib_sa_query *query)
INIT_LIST_HEAD(&query->list);
query->seq = (u32)atomic_inc_return(&ib_nl_sa_request_seq);
+ /* Put the request on the list first.*/
spin_lock_irqsave(&ib_nl_request_lock, flags);
- ret = ib_nl_send_msg(query);
- if (ret <= 0) {
- ret = -EIO;
- goto request_out;
- } else {
- ret = 0;
- }
-
delay = msecs_to_jiffies(sa_local_svc_timeout_ms);
query->timeout = delay + jiffies;
list_add_tail(&query->list, &ib_nl_request_list);
/* Start the timeout if this is the only request */
if (ib_nl_request_list.next == &query->list)
queue_delayed_work(ib_nl_wq, &ib_nl_timed_work, delay);
-
-request_out:
spin_unlock_irqrestore(&ib_nl_request_lock, flags);
+ ret = ib_nl_send_msg(query, gfp_mask);
+ if (ret <= 0) {
+ ret = -EIO;
+ /* Remove the request */
+ spin_lock_irqsave(&ib_nl_request_lock, flags);
+ list_del(&query->list);
+ spin_unlock_irqrestore(&ib_nl_request_lock, flags);
+ } else {
+ ret = 0;
+ }
+
return ret;
}
@@ -1108,7 +1110,7 @@ static int send_mad(struct ib_sa_query *query, int timeout_ms, gfp_t gfp_mask)
if (query->flags & IB_SA_ENABLE_LOCAL_SERVICE) {
if (!ibnl_chk_listeners(RDMA_NL_GROUP_LS)) {
- if (!ib_nl_make_request(query))
+ if (!ib_nl_make_request(query, gfp_mask))
return id;
}
ib_sa_disable_local_svc(query);
diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c
index 94816aeb95a0..1c02deab068f 100644
--- a/drivers/infiniband/core/uverbs_cmd.c
+++ b/drivers/infiniband/core/uverbs_cmd.c
@@ -62,9 +62,11 @@ static struct uverbs_lock_class rule_lock_class = { .name = "RULE-uobj" };
* The ib_uobject locking scheme is as follows:
*
* - ib_uverbs_idr_lock protects the uverbs idrs themselves, so it
- * needs to be held during all idr operations. When an object is
+ * needs to be held during all idr write operations. When an object is
* looked up, a reference must be taken on the object's kref before
- * dropping this lock.
+ * dropping this lock. For read operations, the rcu_read_lock()
+ * and rcu_write_lock() but similarly the kref reference is grabbed
+ * before the rcu_read_unlock().
*
* - Each object also has an rwsem. This rwsem must be held for
* reading while an operation that uses the object is performed.
@@ -96,7 +98,7 @@ static void init_uobj(struct ib_uobject *uobj, u64 user_handle,
static void release_uobj(struct kref *kref)
{
- kfree(container_of(kref, struct ib_uobject, ref));
+ kfree_rcu(container_of(kref, struct ib_uobject, ref), rcu);
}
static void put_uobj(struct ib_uobject *uobj)
@@ -145,7 +147,7 @@ static struct ib_uobject *__idr_get_uobj(struct idr *idr, int id,
{
struct ib_uobject *uobj;
- spin_lock(&ib_uverbs_idr_lock);
+ rcu_read_lock();
uobj = idr_find(idr, id);
if (uobj) {
if (uobj->context == context)
@@ -153,7 +155,7 @@ static struct ib_uobject *__idr_get_uobj(struct idr *idr, int id,
else
uobj = NULL;
}
- spin_unlock(&ib_uverbs_idr_lock);
+ rcu_read_unlock();
return uobj;
}
@@ -2446,6 +2448,7 @@ ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
int i, sg_ind;
int is_ud;
ssize_t ret = -EINVAL;
+ size_t next_size;
if (copy_from_user(&cmd, buf, sizeof cmd))
return -EFAULT;
@@ -2490,7 +2493,8 @@ ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
goto out_put;
}
- ud = alloc_wr(sizeof(*ud), user_wr->num_sge);
+ next_size = sizeof(*ud);
+ ud = alloc_wr(next_size, user_wr->num_sge);
if (!ud) {
ret = -ENOMEM;
goto out_put;
@@ -2511,7 +2515,8 @@ ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
user_wr->opcode == IB_WR_RDMA_READ) {
struct ib_rdma_wr *rdma;
- rdma = alloc_wr(sizeof(*rdma), user_wr->num_sge);
+ next_size = sizeof(*rdma);
+ rdma = alloc_wr(next_size, user_wr->num_sge);
if (!rdma) {
ret = -ENOMEM;
goto out_put;
@@ -2525,7 +2530,8 @@ ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
user_wr->opcode == IB_WR_ATOMIC_FETCH_AND_ADD) {
struct ib_atomic_wr *atomic;
- atomic = alloc_wr(sizeof(*atomic), user_wr->num_sge);
+ next_size = sizeof(*atomic);
+ atomic = alloc_wr(next_size, user_wr->num_sge);
if (!atomic) {
ret = -ENOMEM;
goto out_put;
@@ -2540,7 +2546,8 @@ ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
} else if (user_wr->opcode == IB_WR_SEND ||
user_wr->opcode == IB_WR_SEND_WITH_IMM ||
user_wr->opcode == IB_WR_SEND_WITH_INV) {
- next = alloc_wr(sizeof(*next), user_wr->num_sge);
+ next_size = sizeof(*next);
+ next = alloc_wr(next_size, user_wr->num_sge);
if (!next) {
ret = -ENOMEM;
goto out_put;
@@ -2572,7 +2579,7 @@ ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
if (next->num_sge) {
next->sg_list = (void *) next +
- ALIGN(sizeof *next, sizeof (struct ib_sge));
+ ALIGN(next_size, sizeof(struct ib_sge));
if (copy_from_user(next->sg_list,
buf + sizeof cmd +
cmd.wr_count * cmd.wqe_size +
diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c
index 043a60ee6836..545906dec26d 100644
--- a/drivers/infiniband/core/verbs.c
+++ b/drivers/infiniband/core/verbs.c
@@ -1516,7 +1516,7 @@ EXPORT_SYMBOL(ib_map_mr_sg);
* @sg_nents: number of entries in sg
* @set_page: driver page assignment function pointer
*
- * Core service helper for drivers to covert the largest
+ * Core service helper for drivers to convert the largest
* prefix of given sg list to a page vector. The sg list
* prefix converted is the prefix that meet the requirements
* of ib_map_mr_sg.
@@ -1533,7 +1533,7 @@ int ib_sg_to_pages(struct ib_mr *mr,
u64 last_end_dma_addr = 0, last_page_addr = 0;
unsigned int last_page_off = 0;
u64 page_mask = ~((u64)mr->page_size - 1);
- int i;
+ int i, ret;
mr->iova = sg_dma_address(&sgl[0]);
mr->length = 0;
@@ -1544,27 +1544,29 @@ int ib_sg_to_pages(struct ib_mr *mr,
u64 end_dma_addr = dma_addr + dma_len;
u64 page_addr = dma_addr & page_mask;
- if (i && page_addr != dma_addr) {
- if (last_end_dma_addr != dma_addr) {
- /* gap */
- goto done;
-
- } else if (last_page_off + dma_len <= mr->page_size) {
- /* chunk this fragment with the last */
- mr->length += dma_len;
- last_end_dma_addr += dma_len;
- last_page_off += dma_len;
- continue;
- } else {
- /* map starting from the next page */
- page_addr = last_page_addr + mr->page_size;
- dma_len -= mr->page_size - last_page_off;
- }
+ /*
+ * For the second and later elements, check whether either the
+ * end of element i-1 or the start of element i is not aligned
+ * on a page boundary.
+ */
+ if (i && (last_page_off != 0 || page_addr != dma_addr)) {
+ /* Stop mapping if there is a gap. */
+ if (last_end_dma_addr != dma_addr)
+ break;
+
+ /*
+ * Coalesce this element with the last. If it is small
+ * enough just update mr->length. Otherwise start
+ * mapping from the next page.
+ */
+ goto next_page;
}
do {
- if (unlikely(set_page(mr, page_addr)))
- goto done;
+ ret = set_page(mr, page_addr);
+ if (unlikely(ret < 0))
+ return i ? : ret;
+next_page:
page_addr += mr->page_size;
} while (page_addr < end_dma_addr);
@@ -1574,7 +1576,6 @@ int ib_sg_to_pages(struct ib_mr *mr,
last_page_off = end_dma_addr & ~page_mask;
}
-done:
return i;
}
EXPORT_SYMBOL(ib_sg_to_pages);
diff --git a/drivers/infiniband/hw/mlx4/main.c b/drivers/infiniband/hw/mlx4/main.c
index f567160a4a56..97d6878f9938 100644
--- a/drivers/infiniband/hw/mlx4/main.c
+++ b/drivers/infiniband/hw/mlx4/main.c
@@ -456,7 +456,7 @@ static int mlx4_ib_query_device(struct ib_device *ibdev,
props->max_qp_wr = dev->dev->caps.max_wqes - MLX4_IB_SQ_MAX_SPARE;
props->max_sge = min(dev->dev->caps.max_sq_sg,
dev->dev->caps.max_rq_sg);
- props->max_sge_rd = props->max_sge;
+ props->max_sge_rd = MLX4_MAX_SGE_RD;
props->max_cq = dev->dev->quotas.cq;
props->max_cqe = dev->dev->caps.max_cqes;
props->max_mr = dev->dev->quotas.mpt;
diff --git a/drivers/infiniband/hw/mlx4/qp.c b/drivers/infiniband/hw/mlx4/qp.c
index a2e4ca56da44..13eaaf45288f 100644
--- a/drivers/infiniband/hw/mlx4/qp.c
+++ b/drivers/infiniband/hw/mlx4/qp.c
@@ -34,6 +34,7 @@
#include <linux/log2.h>
#include <linux/slab.h>
#include <linux/netdevice.h>
+#include <linux/vmalloc.h>
#include <rdma/ib_cache.h>
#include <rdma/ib_pack.h>
@@ -795,8 +796,14 @@ static int create_qp_common(struct mlx4_ib_dev *dev, struct ib_pd *pd,
if (err)
goto err_mtt;
- qp->sq.wrid = kmalloc(qp->sq.wqe_cnt * sizeof (u64), gfp);
- qp->rq.wrid = kmalloc(qp->rq.wqe_cnt * sizeof (u64), gfp);
+ qp->sq.wrid = kmalloc(qp->sq.wqe_cnt * sizeof(u64), gfp);
+ if (!qp->sq.wrid)
+ qp->sq.wrid = __vmalloc(qp->sq.wqe_cnt * sizeof(u64),
+ gfp, PAGE_KERNEL);
+ qp->rq.wrid = kmalloc(qp->rq.wqe_cnt * sizeof(u64), gfp);
+ if (!qp->rq.wrid)
+ qp->rq.wrid = __vmalloc(qp->rq.wqe_cnt * sizeof(u64),
+ gfp, PAGE_KERNEL);
if (!qp->sq.wrid || !qp->rq.wrid) {
err = -ENOMEM;
goto err_wrid;
@@ -886,8 +893,8 @@ err_wrid:
if (qp_has_rq(init_attr))
mlx4_ib_db_unmap_user(to_mucontext(pd->uobject->context), &qp->db);
} else {
- kfree(qp->sq.wrid);
- kfree(qp->rq.wrid);
+ kvfree(qp->sq.wrid);
+ kvfree(qp->rq.wrid);
}
err_mtt:
@@ -1062,8 +1069,8 @@ static void destroy_qp_common(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp,
&qp->db);
ib_umem_release(qp->umem);
} else {
- kfree(qp->sq.wrid);
- kfree(qp->rq.wrid);
+ kvfree(qp->sq.wrid);
+ kvfree(qp->rq.wrid);
if (qp->mlx4_ib_qp_type & (MLX4_IB_QPT_PROXY_SMI_OWNER |
MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_GSI))
free_proxy_bufs(&dev->ib_dev, qp);
diff --git a/drivers/infiniband/hw/mlx4/srq.c b/drivers/infiniband/hw/mlx4/srq.c
index dce5dfe3a70e..c394376ebe06 100644
--- a/drivers/infiniband/hw/mlx4/srq.c
+++ b/drivers/infiniband/hw/mlx4/srq.c
@@ -34,6 +34,7 @@
#include <linux/mlx4/qp.h>
#include <linux/mlx4/srq.h>
#include <linux/slab.h>
+#include <linux/vmalloc.h>
#include "mlx4_ib.h"
#include "user.h"
@@ -172,8 +173,12 @@ struct ib_srq *mlx4_ib_create_srq(struct ib_pd *pd,
srq->wrid = kmalloc(srq->msrq.max * sizeof (u64), GFP_KERNEL);
if (!srq->wrid) {
- err = -ENOMEM;
- goto err_mtt;
+ srq->wrid = __vmalloc(srq->msrq.max * sizeof(u64),
+ GFP_KERNEL, PAGE_KERNEL);
+ if (!srq->wrid) {
+ err = -ENOMEM;
+ goto err_mtt;
+ }
}
}
@@ -204,7 +209,7 @@ err_wrid:
if (pd->uobject)
mlx4_ib_db_unmap_user(to_mucontext(pd->uobject->context), &srq->db);
else
- kfree(srq->wrid);
+ kvfree(srq->wrid);
err_mtt:
mlx4_mtt_cleanup(dev->dev, &srq->mtt);
@@ -281,7 +286,7 @@ int mlx4_ib_destroy_srq(struct ib_srq *srq)
mlx4_ib_db_unmap_user(to_mucontext(srq->uobject->context), &msrq->db);
ib_umem_release(msrq->umem);
} else {
- kfree(msrq->wrid);
+ kvfree(msrq->wrid);
mlx4_buf_free(dev->dev, msrq->msrq.max << msrq->msrq.wqe_shift,
&msrq->buf);
mlx4_db_free(dev->dev, &msrq->db);
diff --git a/drivers/infiniband/hw/mlx5/mr.c b/drivers/infiniband/hw/mlx5/mr.c
index ec8993a7b3be..6000f7aeede9 100644
--- a/drivers/infiniband/hw/mlx5/mr.c
+++ b/drivers/infiniband/hw/mlx5/mr.c
@@ -381,7 +381,19 @@ static void __cache_work_func(struct mlx5_cache_ent *ent)
}
}
} else if (ent->cur > 2 * ent->limit) {
- if (!someone_adding(cache) &&
+ /*
+ * The remove_keys() logic is performed as garbage collection
+ * task. Such task is intended to be run when no other active
+ * processes are running.
+ *
+ * The need_resched() will return TRUE if there are user tasks
+ * to be activated in near future.
+ *
+ * In such case, we don't execute remove_keys() and postpone
+ * the garbage collection work to try to run in next cycle,
+ * in order to free CPU resources to other tasks.
+ */
+ if (!need_resched() && !someone_adding(cache) &&
time_after(jiffies, cache->last_add + 300 * HZ)) {
remove_keys(dev, i, 1);
if (ent->cur > ent->limit)
diff --git a/drivers/infiniband/hw/ocrdma/ocrdma.h b/drivers/infiniband/hw/ocrdma/ocrdma.h
index ae80590aabdf..040bb8b5cb15 100644
--- a/drivers/infiniband/hw/ocrdma/ocrdma.h
+++ b/drivers/infiniband/hw/ocrdma/ocrdma.h
@@ -232,6 +232,10 @@ struct phy_info {
u16 interface_type;
};
+enum ocrdma_flags {
+ OCRDMA_FLAGS_LINK_STATUS_INIT = 0x01
+};
+
struct ocrdma_dev {
struct ib_device ibdev;
struct ocrdma_dev_attr attr;
@@ -287,6 +291,7 @@ struct ocrdma_dev {
atomic_t update_sl;
u16 pvid;
u32 asic_id;
+ u32 flags;
ulong last_stats_time;
struct mutex stats_lock; /* provide synch for debugfs operations */
@@ -591,4 +596,9 @@ static inline u8 ocrdma_is_enabled_and_synced(u32 state)
(state & OCRDMA_STATE_FLAG_SYNC);
}
+static inline u8 ocrdma_get_ae_link_state(u32 ae_state)
+{
+ return ((ae_state & OCRDMA_AE_LSC_LS_MASK) >> OCRDMA_AE_LSC_LS_SHIFT);
+}
+
#endif
diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_hw.c b/drivers/infiniband/hw/ocrdma/ocrdma_hw.c
index 30f67bebffa3..283ca842ff74 100644
--- a/drivers/infiniband/hw/ocrdma/ocrdma_hw.c
+++ b/drivers/infiniband/hw/ocrdma/ocrdma_hw.c
@@ -579,6 +579,8 @@ static int ocrdma_mbx_create_mq(struct ocrdma_dev *dev,
cmd->async_event_bitmap = BIT(OCRDMA_ASYNC_GRP5_EVE_CODE);
cmd->async_event_bitmap |= BIT(OCRDMA_ASYNC_RDMA_EVE_CODE);
+ /* Request link events on this MQ. */
+ cmd->async_event_bitmap |= BIT(OCRDMA_ASYNC_LINK_EVE_CODE);
cmd->async_cqid_ringsize = cq->id;
cmd->async_cqid_ringsize |= (ocrdma_encoded_q_len(mq->len) <<
@@ -819,20 +821,42 @@ static void ocrdma_process_grp5_aync(struct ocrdma_dev *dev,
}
}
+static void ocrdma_process_link_state(struct ocrdma_dev *dev,
+ struct ocrdma_ae_mcqe *cqe)
+{
+ struct ocrdma_ae_lnkst_mcqe *evt;
+ u8 lstate;
+
+ evt = (struct ocrdma_ae_lnkst_mcqe *)cqe;
+ lstate = ocrdma_get_ae_link_state(evt->speed_state_ptn);
+
+ if (!(lstate & OCRDMA_AE_LSC_LLINK_MASK))
+ return;
+
+ if (dev->flags & OCRDMA_FLAGS_LINK_STATUS_INIT)
+ ocrdma_update_link_state(dev, (lstate & OCRDMA_LINK_ST_MASK));
+}
+
static void ocrdma_process_acqe(struct ocrdma_dev *dev, void *ae_cqe)
{
/* async CQE processing */
struct ocrdma_ae_mcqe *cqe = ae_cqe;
u32 evt_code = (cqe->valid_ae_event & OCRDMA_AE_MCQE_EVENT_CODE_MASK) >>
OCRDMA_AE_MCQE_EVENT_CODE_SHIFT;
-
- if (evt_code == OCRDMA_ASYNC_RDMA_EVE_CODE)
+ switch (evt_code) {
+ case OCRDMA_ASYNC_LINK_EVE_CODE:
+ ocrdma_process_link_state(dev, cqe);
+ break;
+ case OCRDMA_ASYNC_RDMA_EVE_CODE:
ocrdma_dispatch_ibevent(dev, cqe);
- else if (evt_code == OCRDMA_ASYNC_GRP5_EVE_CODE)
+ break;
+ case OCRDMA_ASYNC_GRP5_EVE_CODE:
ocrdma_process_grp5_aync(dev, cqe);
- else
+ break;
+ default:
pr_err("%s(%d) invalid evt code=0x%x\n", __func__,
dev->id, evt_code);
+ }
}
static void ocrdma_process_mcqe(struct ocrdma_dev *dev, struct ocrdma_mcqe *cqe)
@@ -1363,7 +1387,8 @@ mbx_err:
return status;
}
-int ocrdma_mbx_get_link_speed(struct ocrdma_dev *dev, u8 *lnk_speed)
+int ocrdma_mbx_get_link_speed(struct ocrdma_dev *dev, u8 *lnk_speed,
+ u8 *lnk_state)
{
int status = -ENOMEM;
struct ocrdma_get_link_speed_rsp *rsp;
@@ -1384,8 +1409,11 @@ int ocrdma_mbx_get_link_speed(struct ocrdma_dev *dev, u8 *lnk_speed)
goto mbx_err;
rsp = (struct ocrdma_get_link_speed_rsp *)cmd;
- *lnk_speed = (rsp->pflt_pps_ld_pnum & OCRDMA_PHY_PS_MASK)
- >> OCRDMA_PHY_PS_SHIFT;
+ if (lnk_speed)
+ *lnk_speed = (rsp->pflt_pps_ld_pnum & OCRDMA_PHY_PS_MASK)
+ >> OCRDMA_PHY_PS_SHIFT;
+ if (lnk_state)
+ *lnk_state = (rsp->res_lnk_st & OCRDMA_LINK_ST_MASK);
mbx_err:
kfree(cmd);
@@ -2515,9 +2543,10 @@ static int ocrdma_set_av_params(struct ocrdma_qp *qp,
ocrdma_cpu_to_le32(&cmd->params.sgid[0], sizeof(cmd->params.sgid));
cmd->params.vlan_dmac_b4_to_b5 = mac_addr[4] | (mac_addr[5] << 8);
- if (vlan_id < 0x1000) {
- if (dev->pfc_state) {
- vlan_id = 0;
+ if (vlan_id == 0xFFFF)
+ vlan_id = 0;
+ if (vlan_id || dev->pfc_state) {
+ if (!vlan_id) {
pr_err("ocrdma%d:Using VLAN with PFC is recommended\n",
dev->id);
pr_err("ocrdma%d:Using VLAN 0 for this connection\n",
diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_hw.h b/drivers/infiniband/hw/ocrdma/ocrdma_hw.h
index 7ed885c1851e..ebc1f442aec3 100644
--- a/drivers/infiniband/hw/ocrdma/ocrdma_hw.h
+++ b/drivers/infiniband/hw/ocrdma/ocrdma_hw.h
@@ -106,7 +106,8 @@ void ocrdma_ring_cq_db(struct ocrdma_dev *, u16 cq_id, bool armed,
bool solicited, u16 cqe_popped);
/* verbs specific mailbox commands */
-int ocrdma_mbx_get_link_speed(struct ocrdma_dev *dev, u8 *lnk_speed);
+int ocrdma_mbx_get_link_speed(struct ocrdma_dev *dev, u8 *lnk_speed,
+ u8 *lnk_st);
int ocrdma_query_config(struct ocrdma_dev *,
struct ocrdma_mbx_query_config *config);
@@ -153,5 +154,6 @@ char *port_speed_string(struct ocrdma_dev *dev);
void ocrdma_init_service_level(struct ocrdma_dev *);
void ocrdma_alloc_pd_pool(struct ocrdma_dev *dev);
void ocrdma_free_pd_range(struct ocrdma_dev *dev);
+void ocrdma_update_link_state(struct ocrdma_dev *dev, u8 lstate);
#endif /* __OCRDMA_HW_H__ */
diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_main.c b/drivers/infiniband/hw/ocrdma/ocrdma_main.c
index 62b7009daa6c..3afb40b85159 100644
--- a/drivers/infiniband/hw/ocrdma/ocrdma_main.c
+++ b/drivers/infiniband/hw/ocrdma/ocrdma_main.c
@@ -290,6 +290,7 @@ static void ocrdma_remove_sysfiles(struct ocrdma_dev *dev)
static struct ocrdma_dev *ocrdma_add(struct be_dev_info *dev_info)
{
int status = 0, i;
+ u8 lstate = 0;
struct ocrdma_dev *dev;
dev = (struct ocrdma_dev *)ib_alloc_device(sizeof(struct ocrdma_dev));
@@ -319,6 +320,11 @@ static struct ocrdma_dev *ocrdma_add(struct be_dev_info *dev_info)
if (status)
goto alloc_err;
+ /* Query Link state and update */
+ status = ocrdma_mbx_get_link_speed(dev, NULL, &lstate);
+ if (!status)
+ ocrdma_update_link_state(dev, lstate);
+
for (i = 0; i < ARRAY_SIZE(ocrdma_attributes); i++)
if (device_create_file(&dev->ibdev.dev, ocrdma_attributes[i]))
goto sysfs_err;
@@ -373,7 +379,7 @@ static void ocrdma_remove(struct ocrdma_dev *dev)
ocrdma_remove_free(dev);
}
-static int ocrdma_open(struct ocrdma_dev *dev)
+static int ocrdma_dispatch_port_active(struct ocrdma_dev *dev)
{
struct ib_event port_event;
@@ -384,32 +390,9 @@ static int ocrdma_open(struct ocrdma_dev *dev)
return 0;
}
-static int ocrdma_close(struct ocrdma_dev *dev)
+static int ocrdma_dispatch_port_error(struct ocrdma_dev *dev)
{
- int i;
- struct ocrdma_qp *qp, **cur_qp;
struct ib_event err_event;
- struct ib_qp_attr attrs;
- int attr_mask = IB_QP_STATE;
-
- attrs.qp_state = IB_QPS_ERR;
- mutex_lock(&dev->dev_lock);
- if (dev->qp_tbl) {
- cur_qp = dev->qp_tbl;
- for (i = 0; i < OCRDMA_MAX_QP; i++) {
- qp = cur_qp[i];
- if (qp && qp->ibqp.qp_type != IB_QPT_GSI) {
- /* change the QP state to ERROR */
- _ocrdma_modify_qp(&qp->ibqp, &attrs, attr_mask);
-
- err_event.event = IB_EVENT_QP_FATAL;
- err_event.element.qp = &qp->ibqp;
- err_event.device = &dev->ibdev;
- ib_dispatch_event(&err_event);
- }
- }
- }
- mutex_unlock(&dev->dev_lock);
err_event.event = IB_EVENT_PORT_ERR;
err_event.element.port_num = 1;
@@ -420,7 +403,7 @@ static int ocrdma_close(struct ocrdma_dev *dev)
static void ocrdma_shutdown(struct ocrdma_dev *dev)
{
- ocrdma_close(dev);
+ ocrdma_dispatch_port_error(dev);
ocrdma_remove(dev);
}
@@ -431,18 +414,28 @@ static void ocrdma_shutdown(struct ocrdma_dev *dev)
static void ocrdma_event_handler(struct ocrdma_dev *dev, u32 event)
{
switch (event) {
- case BE_DEV_UP:
- ocrdma_open(dev);
- break;
- case BE_DEV_DOWN:
- ocrdma_close(dev);
- break;
case BE_DEV_SHUTDOWN:
ocrdma_shutdown(dev);
break;
+ default:
+ break;
}
}
+void ocrdma_update_link_state(struct ocrdma_dev *dev, u8 lstate)
+{
+ if (!(dev->flags & OCRDMA_FLAGS_LINK_STATUS_INIT)) {
+ dev->flags |= OCRDMA_FLAGS_LINK_STATUS_INIT;
+ if (!lstate)
+ return;
+ }
+
+ if (!lstate)
+ ocrdma_dispatch_port_error(dev);
+ else
+ ocrdma_dispatch_port_active(dev);
+}
+
static struct ocrdma_driver ocrdma_drv = {
.name = "ocrdma_driver",
.add = ocrdma_add,
diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_sli.h b/drivers/infiniband/hw/ocrdma/ocrdma_sli.h
index 6a38268bbe9f..99dd6fdf06d7 100644
--- a/drivers/infiniband/hw/ocrdma/ocrdma_sli.h
+++ b/drivers/infiniband/hw/ocrdma/ocrdma_sli.h
@@ -465,8 +465,11 @@ struct ocrdma_ae_qp_mcqe {
u32 valid_ae_event;
};
-#define OCRDMA_ASYNC_RDMA_EVE_CODE 0x14
-#define OCRDMA_ASYNC_GRP5_EVE_CODE 0x5
+enum ocrdma_async_event_code {
+ OCRDMA_ASYNC_LINK_EVE_CODE = 0x01,
+ OCRDMA_ASYNC_GRP5_EVE_CODE = 0x05,
+ OCRDMA_ASYNC_RDMA_EVE_CODE = 0x14
+};
enum ocrdma_async_grp5_events {
OCRDMA_ASYNC_EVENT_QOS_VALUE = 0x01,
@@ -489,6 +492,44 @@ enum OCRDMA_ASYNC_EVENT_TYPE {
OCRDMA_MAX_ASYNC_ERRORS
};
+struct ocrdma_ae_lnkst_mcqe {
+ u32 speed_state_ptn;
+ u32 qos_reason_falut;
+ u32 evt_tag;
+ u32 valid_ae_event;
+};
+
+enum {
+ OCRDMA_AE_LSC_PORT_NUM_MASK = 0x3F,
+ OCRDMA_AE_LSC_PT_SHIFT = 0x06,
+ OCRDMA_AE_LSC_PT_MASK = (0x03 <<
+ OCRDMA_AE_LSC_PT_SHIFT),
+ OCRDMA_AE_LSC_LS_SHIFT = 0x08,
+ OCRDMA_AE_LSC_LS_MASK = (0xFF <<
+ OCRDMA_AE_LSC_LS_SHIFT),
+ OCRDMA_AE_LSC_LD_SHIFT = 0x10,
+ OCRDMA_AE_LSC_LD_MASK = (0xFF <<
+ OCRDMA_AE_LSC_LD_SHIFT),
+ OCRDMA_AE_LSC_PPS_SHIFT = 0x18,
+ OCRDMA_AE_LSC_PPS_MASK = (0xFF <<
+ OCRDMA_AE_LSC_PPS_SHIFT),
+ OCRDMA_AE_LSC_PPF_MASK = 0xFF,
+ OCRDMA_AE_LSC_ER_SHIFT = 0x08,
+ OCRDMA_AE_LSC_ER_MASK = (0xFF <<
+ OCRDMA_AE_LSC_ER_SHIFT),
+ OCRDMA_AE_LSC_QOS_SHIFT = 0x10,
+ OCRDMA_AE_LSC_QOS_MASK = (0xFFFF <<
+ OCRDMA_AE_LSC_QOS_SHIFT)
+};
+
+enum {
+ OCRDMA_AE_LSC_PLINK_DOWN = 0x00,
+ OCRDMA_AE_LSC_PLINK_UP = 0x01,
+ OCRDMA_AE_LSC_LLINK_DOWN = 0x02,
+ OCRDMA_AE_LSC_LLINK_MASK = 0x02,
+ OCRDMA_AE_LSC_LLINK_UP = 0x03
+};
+
/* mailbox command request and responses */
enum {
OCRDMA_MBX_QUERY_CFG_CQ_OVERFLOW_SHIFT = 2,
@@ -676,7 +717,7 @@ enum {
OCRDMA_PHY_PFLT_SHIFT = 0x18,
OCRDMA_QOS_LNKSP_MASK = 0xFFFF0000,
OCRDMA_QOS_LNKSP_SHIFT = 0x10,
- OCRDMA_LLST_MASK = 0xFF,
+ OCRDMA_LINK_ST_MASK = 0x01,
OCRDMA_PLFC_MASK = 0x00000400,
OCRDMA_PLFC_SHIFT = 0x8,
OCRDMA_PLRFC_MASK = 0x00000200,
@@ -691,7 +732,7 @@ struct ocrdma_get_link_speed_rsp {
u32 pflt_pps_ld_pnum;
u32 qos_lsp;
- u32 res_lls;
+ u32 res_lnk_st;
};
enum {
diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c b/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c
index 583001bcfb8f..76e96f97b3f6 100644
--- a/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c
+++ b/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c
@@ -171,7 +171,7 @@ static inline void get_link_speed_and_width(struct ocrdma_dev *dev,
int status;
u8 speed;
- status = ocrdma_mbx_get_link_speed(dev, &speed);
+ status = ocrdma_mbx_get_link_speed(dev, &speed, NULL);
if (status)
speed = OCRDMA_PHYS_LINK_SPEED_ZERO;
diff --git a/drivers/infiniband/hw/qib/qib_qsfp.c b/drivers/infiniband/hw/qib/qib_qsfp.c
index 5e27f76805e2..4c7c3c84a741 100644
--- a/drivers/infiniband/hw/qib/qib_qsfp.c
+++ b/drivers/infiniband/hw/qib/qib_qsfp.c
@@ -292,7 +292,7 @@ int qib_refresh_qsfp_cache(struct qib_pportdata *ppd, struct qib_qsfp_cache *cp)
qib_dev_porterr(ppd->dd, ppd->port,
"QSFP byte0 is 0x%02X, S/B 0x0C/D\n", peek[0]);
- if ((peek[2] & 2) == 0) {
+ if ((peek[2] & 4) == 0) {
/*
* If cable is paged, rather than "flat memory", we need to
* set the page to zero, Even if it already appears to be zero.
@@ -538,7 +538,7 @@ int qib_qsfp_dump(struct qib_pportdata *ppd, char *buf, int len)
sofar += scnprintf(buf + sofar, len - sofar, "Date:%.*s\n",
QSFP_DATE_LEN, cd.date);
sofar += scnprintf(buf + sofar, len - sofar, "Lot:%.*s\n",
- QSFP_LOT_LEN, cd.date);
+ QSFP_LOT_LEN, cd.lot);
while (bidx < QSFP_DEFAULT_HDR_CNT) {
int iidx;
diff --git a/drivers/infiniband/hw/qib/qib_verbs.h b/drivers/infiniband/hw/qib/qib_verbs.h
index 2baf5ad251ed..bc803f33d5f6 100644
--- a/drivers/infiniband/hw/qib/qib_verbs.h
+++ b/drivers/infiniband/hw/qib/qib_verbs.h
@@ -329,9 +329,9 @@ struct qib_sge {
struct qib_mr {
struct ib_mr ibmr;
struct ib_umem *umem;
- struct qib_mregion mr; /* must be last */
u64 *pages;
u32 npages;
+ struct qib_mregion mr; /* must be last */
};
/*
diff --git a/drivers/infiniband/ulp/iser/iser_verbs.c b/drivers/infiniband/ulp/iser/iser_verbs.c
index a93070210109..42f4da620f2e 100644
--- a/drivers/infiniband/ulp/iser/iser_verbs.c
+++ b/drivers/infiniband/ulp/iser/iser_verbs.c
@@ -1293,7 +1293,7 @@ u8 iser_check_task_pi_status(struct iscsi_iser_task *iser_task,
if (mr_status.fail_status & IB_MR_CHECK_SIG_STATUS) {
sector_t sector_off = mr_status.sig_err.sig_err_offset;
- do_div(sector_off, sector_size + 8);
+ sector_div(sector_off, sector_size + 8);
*sector = scsi_get_lba(iser_task->sc) + sector_off;
pr_err("PI error found type %d at sector %llx "
diff --git a/drivers/infiniband/ulp/isert/ib_isert.c b/drivers/infiniband/ulp/isert/ib_isert.c
index dfbbbb28090b..8a51c3b5d657 100644
--- a/drivers/infiniband/ulp/isert/ib_isert.c
+++ b/drivers/infiniband/ulp/isert/ib_isert.c
@@ -157,16 +157,9 @@ isert_create_qp(struct isert_conn *isert_conn,
attr.recv_cq = comp->cq;
attr.cap.max_send_wr = ISERT_QP_MAX_REQ_DTOS;
attr.cap.max_recv_wr = ISERT_QP_MAX_RECV_DTOS + 1;
- /*
- * FIXME: Use devattr.max_sge - 2 for max_send_sge as
- * work-around for RDMA_READs with ConnectX-2.
- *
- * Also, still make sure to have at least two SGEs for
- * outgoing control PDU responses.
- */
- attr.cap.max_send_sge = max(2, device->dev_attr.max_sge - 2);
- isert_conn->max_sge = attr.cap.max_send_sge;
-
+ attr.cap.max_send_sge = device->dev_attr.max_sge;
+ isert_conn->max_sge = min(device->dev_attr.max_sge,
+ device->dev_attr.max_sge_rd);
attr.cap.max_recv_sge = 1;
attr.sq_sig_type = IB_SIGNAL_REQ_WR;
attr.qp_type = IB_QPT_RC;
diff --git a/drivers/infiniband/ulp/srp/ib_srp.c b/drivers/infiniband/ulp/srp/ib_srp.c
index 9909022dc6c3..3db9a659719b 100644
--- a/drivers/infiniband/ulp/srp/ib_srp.c
+++ b/drivers/infiniband/ulp/srp/ib_srp.c
@@ -488,7 +488,7 @@ static int srp_create_ch_ib(struct srp_rdma_ch *ch)
struct ib_qp *qp;
struct ib_fmr_pool *fmr_pool = NULL;
struct srp_fr_pool *fr_pool = NULL;
- const int m = 1 + dev->use_fast_reg;
+ const int m = dev->use_fast_reg ? 3 : 1;
struct ib_cq_init_attr cq_attr = {};
int ret;
@@ -994,16 +994,16 @@ static int srp_connect_ch(struct srp_rdma_ch *ch, bool multich)
ret = srp_lookup_path(ch);
if (ret)
- return ret;
+ goto out;
while (1) {
init_completion(&ch->done);
ret = srp_send_req(ch, multich);
if (ret)
- return ret;
+ goto out;
ret = wait_for_completion_interruptible(&ch->done);
if (ret < 0)
- return ret;
+ goto out;
/*
* The CM event handling code will set status to
@@ -1011,15 +1011,16 @@ static int srp_connect_ch(struct srp_rdma_ch *ch, bool multich)
* back, or SRP_DLID_REDIRECT if we get a lid/qp
* redirect REJ back.
*/
- switch (ch->status) {
+ ret = ch->status;
+ switch (ret) {
case 0:
ch->connected = true;
- return 0;
+ goto out;
case SRP_PORT_REDIRECT:
ret = srp_lookup_path(ch);
if (ret)
- return ret;
+ goto out;
break;
case SRP_DLID_REDIRECT:
@@ -1028,13 +1029,16 @@ static int srp_connect_ch(struct srp_rdma_ch *ch, bool multich)
case SRP_STALE_CONN:
shost_printk(KERN_ERR, target->scsi_host, PFX
"giving up on stale connection\n");
- ch->status = -ECONNRESET;
- return ch->status;
+ ret = -ECONNRESET;
+ goto out;
default:
- return ch->status;
+ goto out;
}
}
+
+out:
+ return ret <= 0 ? ret : -ENODEV;
}
static int srp_inv_rkey(struct srp_rdma_ch *ch, u32 rkey)
@@ -1309,7 +1313,7 @@ reset_state:
}
static int srp_map_finish_fr(struct srp_map_state *state,
- struct srp_rdma_ch *ch)
+ struct srp_rdma_ch *ch, int sg_nents)
{
struct srp_target_port *target = ch->target;
struct srp_device *dev = target->srp_host->srp_dev;
@@ -1324,10 +1328,10 @@ static int srp_map_finish_fr(struct srp_map_state *state,
WARN_ON_ONCE(!dev->use_fast_reg);
- if (state->sg_nents == 0)
+ if (sg_nents == 0)
return 0;
- if (state->sg_nents == 1 && target->global_mr) {
+ if (sg_nents == 1 && target->global_mr) {
srp_map_desc(state, sg_dma_address(state->sg),
sg_dma_len(state->sg),
target->global_mr->rkey);
@@ -1341,8 +1345,7 @@ static int srp_map_finish_fr(struct srp_map_state *state,
rkey = ib_inc_rkey(desc->mr->rkey);
ib_update_fast_reg_key(desc->mr, rkey);
- n = ib_map_mr_sg(desc->mr, state->sg, state->sg_nents,
- dev->mr_page_size);
+ n = ib_map_mr_sg(desc->mr, state->sg, sg_nents, dev->mr_page_size);
if (unlikely(n < 0))
return n;
@@ -1448,16 +1451,15 @@ static int srp_map_sg_fr(struct srp_map_state *state, struct srp_rdma_ch *ch,
state->fr.next = req->fr_list;
state->fr.end = req->fr_list + ch->target->cmd_sg_cnt;
state->sg = scat;
- state->sg_nents = scsi_sg_count(req->scmnd);
- while (state->sg_nents) {
+ while (count) {
int i, n;
- n = srp_map_finish_fr(state, ch);
+ n = srp_map_finish_fr(state, ch, count);
if (unlikely(n < 0))
return n;
- state->sg_nents -= n;
+ count -= n;
for (i = 0; i < n; i++)
state->sg = sg_next(state->sg);
}
@@ -1517,10 +1519,12 @@ static int srp_map_idb(struct srp_rdma_ch *ch, struct srp_request *req,
if (dev->use_fast_reg) {
state.sg = idb_sg;
- state.sg_nents = 1;
sg_set_buf(idb_sg, req->indirect_desc, idb_len);
idb_sg->dma_address = req->indirect_dma_addr; /* hack! */
- ret = srp_map_finish_fr(&state, ch);
+#ifdef CONFIG_NEED_SG_DMA_LENGTH
+ idb_sg->dma_length = idb_sg->length; /* hack^2 */
+#endif
+ ret = srp_map_finish_fr(&state, ch, 1);
if (ret < 0)
return ret;
} else if (dev->use_fmr) {
@@ -1655,7 +1659,7 @@ static int srp_map_data(struct scsi_cmnd *scmnd, struct srp_rdma_ch *ch,
return ret;
req->nmdesc++;
} else {
- idb_rkey = target->global_mr->rkey;
+ idb_rkey = cpu_to_be32(target->global_mr->rkey);
}
indirect_hdr->table_desc.va = cpu_to_be64(req->indirect_dma_addr);
diff --git a/drivers/infiniband/ulp/srp/ib_srp.h b/drivers/infiniband/ulp/srp/ib_srp.h
index 87a2a919dc43..f6af531f9f32 100644
--- a/drivers/infiniband/ulp/srp/ib_srp.h
+++ b/drivers/infiniband/ulp/srp/ib_srp.h
@@ -300,10 +300,7 @@ struct srp_map_state {
dma_addr_t base_dma_addr;
u32 dma_len;
u32 total_len;
- union {
- unsigned int npages;
- int sg_nents;
- };
+ unsigned int npages;
unsigned int nmdesc;
unsigned int ndesc;
};