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IB/rxe: Avoid scheduling tasklet for userspace QP

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This patch avoids scheduing tasklet for WQE and protocol processing
for user space QP. It performs the task in calling process context.

To improve code readability kernel specific post_send handling moved to
post_send_kernel() function.

Signed-off-by: Parav Pandit <pandit.parav@gmail.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Parav Pandit 2016-09-28 20:24:12 +00:00 committed by Doug Ledford
parent 61347fa608
commit 063af59597
1 changed files with 25 additions and 13 deletions
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38
drivers/infiniband/sw/rxe/rxe_verbs.c
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@ -801,26 +801,15 @@ err1:
return err; return err;
} }
static int rxe_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr, static int rxe_post_send_kernel(struct rxe_qp *qp, struct ib_send_wr *wr,
struct ib_send_wr **bad_wr) struct ib_send_wr **bad_wr)
{ {
int err = 0; int err = 0;
struct rxe_qp *qp = to_rqp(ibqp);
unsigned int mask; unsigned int mask;
unsigned int length = 0; unsigned int length = 0;
int i; int i;
int must_sched; int must_sched;
if (unlikely(!qp->valid)) {
*bad_wr = wr;
return -EINVAL;
}
if (unlikely(qp->req.state < QP_STATE_READY)) {
*bad_wr = wr;
return -EINVAL;
}
while (wr) { while (wr) {
mask = wr_opcode_mask(wr->opcode, qp); mask = wr_opcode_mask(wr->opcode, qp);
if (unlikely(!mask)) { if (unlikely(!mask)) {
@ -861,6 +850,29 @@ static int rxe_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
return err; return err;
} }
static int rxe_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
struct ib_send_wr **bad_wr)
{
struct rxe_qp *qp = to_rqp(ibqp);
if (unlikely(!qp->valid)) {
*bad_wr = wr;
return -EINVAL;
}
if (unlikely(qp->req.state < QP_STATE_READY)) {
*bad_wr = wr;
return -EINVAL;
}
if (qp->is_user) {
/* Utilize process context to do protocol processing */
rxe_run_task(&qp->req.task, 0);
return 0;
} else
return rxe_post_send_kernel(qp, wr, bad_wr);
}
static int rxe_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr, static int rxe_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr,
struct ib_recv_wr **bad_wr) struct ib_recv_wr **bad_wr)
{ {