From: Somnath Kotur <somnath.kotur@xxxxxxxxxxxx>
Due to a know bug, h/w is stopping UD-WQE processing after
0x800000 WQEs. Library needs to move the QP from RTS to RTS
around half-way mark. This patch adds a simple wqe-counter
and modfies the qp to circumvent the problem.
Signed-off-by: Somnath Kotur <somnath.kotur@xxxxxxxxxxxx>
Signed-off-by: Devesh Sharma <devesh.sharma@xxxxxxxxxxxx>
---
providers/bnxt_re/main.h | 3 +++
providers/bnxt_re/verbs.c | 12 ++++++++++++
2 files changed, 15 insertions(+)
diff --git a/providers/bnxt_re/main.h b/providers/bnxt_re/main.h
index 4cc8abd..9688fec 100644
--- a/providers/bnxt_re/main.h
+++ b/providers/bnxt_re/main.h
@@ -54,6 +54,8 @@
#define DEV "bnxt_re : "
+#define BNXT_RE_UD_QP_HW_STALL 0x400000
+
struct bnxt_re_dpi {
__u32 dpindx;
__u64 *dbpage;
@@ -113,6 +115,7 @@ struct bnxt_re_qp {
uint32_t tbl_indx;
uint32_t sq_psn;
uint32_t pending_db;
+ uint64_t wqe_cnt;
uint16_t mtu;
uint16_t qpst;
uint8_t qptyp;
diff --git a/providers/bnxt_re/verbs.c b/providers/bnxt_re/verbs.c
index 7cf0b86..abe4e2e 100644
--- a/providers/bnxt_re/verbs.c
+++ b/providers/bnxt_re/verbs.c
@@ -1240,8 +1240,20 @@ int bnxt_re_post_send(struct ibv_qp *ibvqp, struct ibv_send_wr *wr,
bnxt_re_fill_wrid(wrid, wr, bytes, qp->cap.sqsig);
bnxt_re_fill_psns(qp, psns, wr->opcode, bytes);
bnxt_re_incr_tail(sq);
+ qp->wqe_cnt++;
wr = wr->next;
bnxt_re_ring_sq_db(qp);
+ if (qp->wqe_cnt == BNXT_RE_UD_QP_HW_STALL && qp->qptyp ==
+ IBV_QPT_UD) {
+ /* Move RTS to RTS since it is time. */
+ struct ibv_qp_attr attr;
+ int attr_mask;
+
+ attr_mask = IBV_QP_STATE;
+ attr.qp_state = IBV_QPS_RTS;
+ bnxt_re_modify_qp(&qp->ibvqp, &attr, attr_mask);
+ qp->wqe_cnt = 0;
+ }
}
pthread_spin_unlock(&sq->qlock);
--
1.8.3.1
--
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