From ffc3f7487ff0b32500b319c770475383f6f6efab Mon Sep 17 00:00:00 2001 From: Steve Wise Date: Fri, 11 Mar 2011 22:30:42 +0000 Subject: [PATCH] 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: Steve Wise Signed-off-by: Roland Dreier --- drivers/infiniband/hw/cxgb4/t4.h | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/infiniband/hw/cxgb4/t4.h b/drivers/infiniband/hw/cxgb4/t4.h index 70004425d695..24af12fc8228 100644 --- a/drivers/infiniband/hw/cxgb4/t4.h +++ b/drivers/infiniband/hw/cxgb4/t4.h @@ -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; -- 2.30.2