diff options
| author | Sebastian Sanchez <sebastian.sanchez@intel.com> | 2018-02-01 10:46:15 -0800 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@mellanox.com> | 2018-02-01 15:43:28 -0700 |
| commit | f150e2736f346a3171f002e660c3dfc653cc11cd (patch) | |
| tree | 72dd1e10ecd6f5566d3d03d7b5362c24ac203ed5 /drivers/infiniband/hw/hfi1/rc.c | |
| parent | 9636258f103bac6853e280beecf9e85674736a6a (diff) | |
| download | linux-f150e2736f346a3171f002e660c3dfc653cc11cd.tar.gz | |
IB/hfi1: Compute BTH only for RDMA_WRITE_LAST/SEND_LAST packet
In hfi1_rc_rcv(), BTH is computed for all packets received.
However, it's only used for packets received with opcodes
RDMA_WRITE_LAST and SEND_LAST, and it is a costly operation.
Compute BTH only in the RDMA_WRITE_LAST/SEND_LAST code path
and let the compiler handle endianness conversion for bitwise
operations.
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Sebastian Sanchez <sebastian.sanchez@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'drivers/infiniband/hw/hfi1/rc.c')
| -rw-r--r-- | drivers/infiniband/hw/hfi1/rc.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/infiniband/hw/hfi1/rc.c b/drivers/infiniband/hw/hfi1/rc.c index 524c12f04bd9..70aa82b305d8 100644 --- a/drivers/infiniband/hw/hfi1/rc.c +++ b/drivers/infiniband/hw/hfi1/rc.c @@ -2035,7 +2035,6 @@ void hfi1_rc_rcv(struct hfi1_packet *packet) struct rvt_qp *qp = packet->qp; struct hfi1_ibport *ibp = rcd_to_iport(rcd); struct ib_other_headers *ohdr = packet->ohdr; - u32 bth0 = be32_to_cpu(ohdr->bth[0]); u32 opcode = packet->opcode; u32 hdrsize = packet->hlen; u32 psn = ib_bth_get_psn(packet->ohdr); @@ -2233,7 +2232,7 @@ send_last: wc.port_num = 0; /* Signal completion event if the solicited bit is set. */ rvt_cq_enter(ibcq_to_rvtcq(qp->ibqp.recv_cq), &wc, - (bth0 & IB_BTH_SOLICITED) != 0); + ib_bth_is_solicited(ohdr)); break; case OP(RDMA_WRITE_ONLY): |