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authorMike Marciniszyn <mike.marciniszyn@qlogic.com>2011-09-23 13:16:34 -0400
committerRoland Dreier <roland@purestorage.com>2011-10-21 09:38:50 -0700
commitcc6ea1385b43487f6ef03bdc91416c8366d28311 (patch)
tree013266a6ebb9c9e810761677614bddd42a45932b
parent2fc109c890f7d9620cfed8d439be071a8b2a8bbd (diff)
IB/qib: Decode path MTU optimization
Store both the encoded and decoded MTU in the QP structure as a minor optimization for UC/RC receive routines. Signed-off-by: Mike Marciniszyn <mike.marciniszyn@qlogic.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
-rw-r--r--drivers/infiniband/hw/qib/qib_qp.c4
-rw-r--r--drivers/infiniband/hw/qib/qib_rc.c6
-rw-r--r--drivers/infiniband/hw/qib/qib_uc.c4
-rw-r--r--drivers/infiniband/hw/qib/qib_verbs.h1
4 files changed, 9 insertions, 6 deletions
diff --git a/drivers/infiniband/hw/qib/qib_qp.c b/drivers/infiniband/hw/qib/qib_qp.c
index e16751f8639e..9d094f910360 100644
--- a/drivers/infiniband/hw/qib/qib_qp.c
+++ b/drivers/infiniband/hw/qib/qib_qp.c
@@ -765,8 +765,10 @@ int qib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
}
}
- if (attr_mask & IB_QP_PATH_MTU)
+ if (attr_mask & IB_QP_PATH_MTU) {
qp->path_mtu = pmtu;
+ qp->pmtu = ib_mtu_enum_to_int(pmtu);
+ }
if (attr_mask & IB_QP_RETRY_CNT) {
qp->s_retry_cnt = attr->retry_cnt;
diff --git a/drivers/infiniband/hw/qib/qib_rc.c b/drivers/infiniband/hw/qib/qib_rc.c
index 5c1c49b299f1..5d77cb8aa052 100644
--- a/drivers/infiniband/hw/qib/qib_rc.c
+++ b/drivers/infiniband/hw/qib/qib_rc.c
@@ -239,7 +239,7 @@ int qib_make_rc_req(struct qib_qp *qp)
u32 len;
u32 bth0;
u32 bth2;
- u32 pmtu = ib_mtu_enum_to_int(qp->path_mtu);
+ u32 pmtu = qp->pmtu;
char newreq;
unsigned long flags;
int ret = 0;
@@ -1732,7 +1732,7 @@ static int qib_rc_rcv_error(struct qib_other_headers *ohdr,
* same request.
*/
offset = ((psn - e->psn) & QIB_PSN_MASK) *
- ib_mtu_enum_to_int(qp->path_mtu);
+ qp->pmtu;
len = be32_to_cpu(reth->length);
if (unlikely(offset + len != e->rdma_sge.sge_length))
goto unlock_done;
@@ -1876,7 +1876,7 @@ void qib_rc_rcv(struct qib_ctxtdata *rcd, struct qib_ib_header *hdr,
u32 psn;
u32 pad;
struct ib_wc wc;
- u32 pmtu = ib_mtu_enum_to_int(qp->path_mtu);
+ u32 pmtu = qp->pmtu;
int diff;
struct ib_reth *reth;
unsigned long flags;
diff --git a/drivers/infiniband/hw/qib/qib_uc.c b/drivers/infiniband/hw/qib/qib_uc.c
index d31f33a99887..9a4630f8276f 100644
--- a/drivers/infiniband/hw/qib/qib_uc.c
+++ b/drivers/infiniband/hw/qib/qib_uc.c
@@ -51,7 +51,7 @@ int qib_make_uc_req(struct qib_qp *qp)
u32 hwords;
u32 bth0;
u32 len;
- u32 pmtu = ib_mtu_enum_to_int(qp->path_mtu);
+ u32 pmtu = qp->pmtu;
int ret = 0;
spin_lock_irqsave(&qp->s_lock, flags);
@@ -249,7 +249,7 @@ void qib_uc_rcv(struct qib_ibport *ibp, struct qib_ib_header *hdr,
u32 psn;
u32 pad;
struct ib_wc wc;
- u32 pmtu = ib_mtu_enum_to_int(qp->path_mtu);
+ u32 pmtu = qp->pmtu;
struct ib_reth *reth;
int ret;
diff --git a/drivers/infiniband/hw/qib/qib_verbs.h b/drivers/infiniband/hw/qib/qib_verbs.h
index 95e5b47223b3..ec3711f743c5 100644
--- a/drivers/infiniband/hw/qib/qib_verbs.h
+++ b/drivers/infiniband/hw/qib/qib_verbs.h
@@ -485,6 +485,7 @@ struct qib_qp {
u8 alt_timeout; /* Alternate path timeout for this QP */
u8 port_num;
enum ib_mtu path_mtu;
+ u32 pmtu; /* decoded from path_mtu */
u32 remote_qpn;
u32 qkey; /* QKEY for this QP (for UD or RD) */
u32 s_size; /* send work queue size */