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Commit ffc3f748 authored by Steve Wise's avatar Steve Wise Committed by Roland Dreier
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RDMA/cxgb4: Do CIDX_INC updates every 1/16 CQ depth CQE reaps 



This avoids the CIDX_INC overflow issue with T4A2 when running
kernel RDMA applications.

Signed-off-by: default avatarSteve Wise <swise@opengridcomputing.com>
Signed-off-by: default avatarRoland Dreier <roland@purestorage.com>
parent 29428137

drivers/infiniband/hw/cxgb4/t4.h

+7 −1
Original line number Diff line number Diff line
@@ -507,8 +507,14 @@ static inline void t4_swcq_consume(struct t4_cq *cq) 
static inline void t4_hwcq_consume(struct t4_cq *cq)

{

	cq->bits_type_ts = cq->queue[cq->cidx].bits_type_ts;

	if (++cq->cidx_inc == cq->size)

	if (++cq->cidx_inc == (cq->size >> 4)) {

		u32 val;



		val = SEINTARM(0) | CIDXINC(cq->cidx_inc) | TIMERREG(7) |

		      INGRESSQID(cq->cqid);

		writel(val, cq->gts);

		cq->cidx_inc = 0;

	}

	if (++cq->cidx == cq->size) {

		cq->cidx = 0;

		cq->gen ^= 1;