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authorBart Van Assche <bart.vanassche@wdc.com>2017-10-11 10:27:24 -0700
committerDoug Ledford <dledford@redhat.com>2017-10-18 10:49:54 -0400
commit74333f122388437cf1e2296ee9a3ae19d8858bc4 (patch)
treee5f26cb4b8c41eb4123956e87c17ea0a83970315
parent7a01d05cd5bed9594fbc4dff5e944652ff23876c (diff)
IB/srpt: Cache global L_Key
This patch is a micro-optimization for the hot path. Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
-rw-r--r--drivers/infiniband/ulp/srpt/ib_srpt.c6
-rw-r--r--drivers/infiniband/ulp/srpt/ib_srpt.h3
2 files changed, 6 insertions, 3 deletions
diff --git a/drivers/infiniband/ulp/srpt/ib_srpt.c b/drivers/infiniband/ulp/srpt/ib_srpt.c
index 76370e39857d..6cf95ad870cc 100644
--- a/drivers/infiniband/ulp/srpt/ib_srpt.c
+++ b/drivers/infiniband/ulp/srpt/ib_srpt.c
@@ -766,7 +766,7 @@ static int srpt_post_recv(struct srpt_device *sdev,
BUG_ON(!sdev);
list.addr = ioctx->ioctx.dma;
list.length = srp_max_req_size;
- list.lkey = sdev->pd->local_dma_lkey;
+ list.lkey = sdev->lkey;
ioctx->ioctx.cqe.done = srpt_recv_done;
wr.wr_cqe = &ioctx->ioctx.cqe;
@@ -2343,7 +2343,7 @@ static void srpt_queue_response(struct se_cmd *cmd)
sge.addr = ioctx->ioctx.dma;
sge.length = resp_len;
- sge.lkey = sdev->pd->local_dma_lkey;
+ sge.lkey = sdev->lkey;
ioctx->ioctx.cqe.done = srpt_send_done;
send_wr.next = NULL;
@@ -2491,6 +2491,8 @@ static void srpt_add_one(struct ib_device *device)
if (IS_ERR(sdev->pd))
goto free_dev;
+ sdev->lkey = sdev->pd->local_dma_lkey;
+
sdev->srq_size = min(srpt_srq_size, sdev->device->attrs.max_srq_wr);
srq_attr.event_handler = srpt_srq_event;
diff --git a/drivers/infiniband/ulp/srpt/ib_srpt.h b/drivers/infiniband/ulp/srpt/ib_srpt.h
index 1b817e51b84b..976e924d7400 100644
--- a/drivers/infiniband/ulp/srpt/ib_srpt.h
+++ b/drivers/infiniband/ulp/srpt/ib_srpt.h
@@ -343,7 +343,7 @@ struct srpt_port {
* struct srpt_device - Information associated by SRPT with a single HCA.
* @device: Backpointer to the struct ib_device managed by the IB core.
* @pd: IB protection domain.
- * @mr: L_Key (local key) with write access to all local memory.
+ * @lkey: L_Key (local key) with write access to all local memory.
* @srq: Per-HCA SRQ (shared receive queue).
* @cm_id: Connection identifier.
* @srq_size: SRQ size.
@@ -358,6 +358,7 @@ struct srpt_port {
struct srpt_device {
struct ib_device *device;
struct ib_pd *pd;
+ u32 lkey;
struct ib_srq *srq;
struct ib_cm_id *cm_id;
int srq_size;

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