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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>
This commit is contained in:
Sebastian Sanchez 2018-02-01 10:46:15 -08:00 committed by Jason Gunthorpe
parent 9636258f10
commit f150e2736f
7 changed files with 10 additions and 12 deletions
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3
drivers/infiniband/hw/hfi1/rc.c
View File

@ -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 @@ void hfi1_rc_rcv(struct hfi1_packet *packet)
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):

3
drivers/infiniband/hw/hfi1/uc.c
View File

@ -478,8 +478,7 @@ void hfi1_uc_rcv(struct hfi1_packet *packet)
wc.port_num = 0;
/* Signal completion event if the solicited bit is set. */
rvt_cq_enter(ibcq_to_rvtcq(qp->ibqp.recv_cq), &wc,
(ohdr->bth[0] &
cpu_to_be32(IB_BTH_SOLICITED)) != 0);
ib_bth_is_solicited(ohdr));
break;
case OP(RDMA_WRITE_FIRST):

3
drivers/infiniband/hw/hfi1/ud.c
View File

@ -1045,8 +1045,7 @@ void hfi1_ud_rcv(struct hfi1_packet *packet)
wc.port_num = qp->port_num;
/* Signal completion event if the solicited bit is set. */
rvt_cq_enter(ibcq_to_rvtcq(qp->ibqp.recv_cq), &wc,
(ohdr->bth[0] &
cpu_to_be32(IB_BTH_SOLICITED)) != 0);
ib_bth_is_solicited(ohdr));
return;
drop:

3
drivers/infiniband/hw/qib/qib_rc.c
View File

@ -1916,8 +1916,7 @@ void qib_rc_rcv(struct qib_ctxtdata *rcd, struct ib_header *hdr,
wc.port_num = 0;
/* Signal completion event if the solicited bit is set. */
rvt_cq_enter(ibcq_to_rvtcq(qp->ibqp.recv_cq), &wc,
(ohdr->bth[0] &
cpu_to_be32(IB_BTH_SOLICITED)) != 0);
ib_bth_is_solicited(ohdr));
break;
case OP(RDMA_WRITE_FIRST):

3
drivers/infiniband/hw/qib/qib_uc.c
View File

@ -403,8 +403,7 @@ void qib_uc_rcv(struct qib_ibport *ibp, struct ib_header *hdr,
wc.port_num = 0;
/* Signal completion event if the solicited bit is set. */
rvt_cq_enter(ibcq_to_rvtcq(qp->ibqp.recv_cq), &wc,
(ohdr->bth[0] &
cpu_to_be32(IB_BTH_SOLICITED)) != 0);
ib_bth_is_solicited(ohdr));
break;
case OP(RDMA_WRITE_FIRST):

3
drivers/infiniband/hw/qib/qib_ud.c
View File

@ -581,8 +581,7 @@ void qib_ud_rcv(struct qib_ibport *ibp, struct ib_header *hdr,
wc.port_num = qp->port_num;
/* Signal completion event if the solicited bit is set. */
rvt_cq_enter(ibcq_to_rvtcq(qp->ibqp.recv_cq), &wc,
(ohdr->bth[0] &
cpu_to_be32(IB_BTH_SOLICITED)) != 0);
ib_bth_is_solicited(ohdr));
return;
drop:

4
include/rdma/ib_hdrs.h
View File

@ -331,4 +331,8 @@ static inline u8 ib_bth_get_tver(struct ib_other_headers *ohdr)
IB_BTH_TVER_MASK);
}
static inline bool ib_bth_is_solicited(struct ib_other_headers *ohdr)
{
return ohdr->bth[0] & cpu_to_be32(IB_BTH_SOLICITED);
}
#endif /* IB_HDRS_H */