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| author | Mike Marciniszyn <mike.marciniszyn@qlogic.com> | 2011-09-23 13:16:34 -0400 |
|---|---|---|
| committer | Roland Dreier <roland@purestorage.com> | 2011-10-21 09:38:50 -0700 |
| commit | cc6ea1385b43487f6ef03bdc91416c8366d28311 (patch) | |
| tree | 013266a6ebb9c9e810761677614bddd42a45932b /drivers/infiniband | |
| parent | 2fc109c890f7d9620cfed8d439be071a8b2a8bbd (diff) | |
| download | linux-cc6ea1385b43487f6ef03bdc91416c8366d28311.tar.gz linux-cc6ea1385b43487f6ef03bdc91416c8366d28311.tar.bz2 linux-cc6ea1385b43487f6ef03bdc91416c8366d28311.zip | |
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>
Diffstat (limited to 'drivers/infiniband')
| -rw-r--r-- | drivers/infiniband/hw/qib/qib_qp.c | 4 | ||||
| -rw-r--r-- | drivers/infiniband/hw/qib/qib_rc.c | 6 | ||||
| -rw-r--r-- | drivers/infiniband/hw/qib/qib_uc.c | 4 | ||||
| -rw-r--r-- | drivers/infiniband/hw/qib/qib_verbs.h | 1 |
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 */ |