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IB/rxe: Avoid scheduling tasklet for userspace QP 

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
View File

@ -801,26 +801,15 @@ err1:
return err;
}
static int rxe_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
struct ib_send_wr **bad_wr)
static int rxe_post_send_kernel(struct rxe_qp *qp, struct ib_send_wr *wr,
struct ib_send_wr **bad_wr)
{
int err = 0;
struct rxe_qp *qp = to_rqp(ibqp);
unsigned int mask;
unsigned int length = 0;
int i;
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) {
mask = wr_opcode_mask(wr->opcode, qp);
if (unlikely(!mask)) {
@ -861,6 +850,29 @@ static int rxe_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
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,
struct ib_recv_wr **bad_wr)
{