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IB/mlx4: Fetch XRC SRQ in the CQ polling code 

An XRC target QP may redirect to more than one XRC SRQ.  This means
that for work completions associated with a XRC TGT QP, the srq field
in the QP has no usage and the real XRC SRQ need to be retrived using
the information from the XRCETH placed into the CQE, do that.

Signed-off-by: Shlomo Pongratz <shlomop@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Shlomo Pongratz 2013-04-10 14:26:48 +00:00 committed by Roland Dreier
parent 9f550553a4
commit f3cca4b1f4
1 changed files with 21 additions and 0 deletions
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21
drivers/infiniband/hw/mlx4/cq.c
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@ -33,6 +33,7 @@
#include <linux/mlx4/cq.h>
#include <linux/mlx4/qp.h>
#include <linux/mlx4/srq.h>
#include <linux/slab.h>
#include "mlx4_ib.h"
@ -585,6 +586,7 @@ static int mlx4_ib_poll_one(struct mlx4_ib_cq *cq,
struct mlx4_qp *mqp;
struct mlx4_ib_wq *wq;
struct mlx4_ib_srq *srq;
struct mlx4_srq *msrq = NULL;
int is_send;
int is_error;
u32 g_mlpath_rqpn;
@ -653,6 +655,20 @@ repoll:
wc->qp = &(*cur_qp)->ibqp;
if (wc->qp->qp_type == IB_QPT_XRC_TGT) {
u32 srq_num;
g_mlpath_rqpn = be32_to_cpu(cqe->g_mlpath_rqpn);
srq_num = g_mlpath_rqpn & 0xffffff;
/* SRQ is also in the radix tree */
msrq = mlx4_srq_lookup(to_mdev(cq->ibcq.device)->dev,
srq_num);
if (unlikely(!msrq)) {
pr_warn("CQ %06x with entry for unknown SRQN %06x\n",
cq->mcq.cqn, srq_num);
return -EINVAL;
}
}
if (is_send) {
wq = &(*cur_qp)->sq;
if (!(*cur_qp)->sq_signal_bits) {
@ -666,6 +682,11 @@ repoll:
wqe_ctr = be16_to_cpu(cqe->wqe_index);
wc->wr_id = srq->wrid[wqe_ctr];
mlx4_ib_free_srq_wqe(srq, wqe_ctr);
} else if (msrq) {
srq = to_mibsrq(msrq);
wqe_ctr = be16_to_cpu(cqe->wqe_index);
wc->wr_id = srq->wrid[wqe_ctr];
mlx4_ib_free_srq_wqe(srq, wqe_ctr);
} else {
wq = &(*cur_qp)->rq;
tail = wq->tail & (wq->wqe_cnt - 1);