From: Steve Wise <swise-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
To: linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: [PATCH 03/11] RDMA/cxgb4: CQ size must be IQ size - 2.
Date: Thu, 20 May 2010 16:57:38 -0500 [thread overview]
Message-ID: <20100520215738.32394.60360.stgit@build.ogc.int> (raw)
In-Reply-To: <20100520215727.32394.90669.stgit-T4OLL4TyM9aNDNWfRnPdfg@public.gmane.org>
1 for the status page
1 to always have 1 free entry to detect full.
Signed-off-by: Steve Wise <swise-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
---
drivers/infiniband/hw/cxgb4/cq.c | 5 ++++-
1 files changed, 4 insertions(+), 1 deletions(-)
diff --git a/drivers/infiniband/hw/cxgb4/cq.c b/drivers/infiniband/hw/cxgb4/cq.c
index fb1aafc..46ac00f 100644
--- a/drivers/infiniband/hw/cxgb4/cq.c
+++ b/drivers/infiniband/hw/cxgb4/cq.c
@@ -780,6 +780,9 @@ struct ib_cq *c4iw_create_cq(struct ib_device *ibdev, int entries,
/* account for the status page. */
entries++;
+ /* IQ needs one extra entry to differentiate full vs empty. */
+ entries++;
+
/*
* entries must be multiple of 16 for HW.
*/
@@ -801,7 +804,7 @@ struct ib_cq *c4iw_create_cq(struct ib_device *ibdev, int entries,
chp->rhp = rhp;
chp->cq.size--; /* status page */
- chp->ibcq.cqe = chp->cq.size;
+ chp->ibcq.cqe = chp->cq.size - 1;
spin_lock_init(&chp->lock);
atomic_set(&chp->refcnt, 1);
init_waitqueue_head(&chp->wait);
--
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next prev parent reply other threads:[~2010-05-20 21:57 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-20 21:57 [PATCH 01/11] RDMA/cxgb4: Detach from the LLD after unregistering with the RDMA core Steve Wise
[not found] ` <20100520215727.32394.90669.stgit-T4OLL4TyM9aNDNWfRnPdfg@public.gmane.org>
2010-05-20 21:57 ` [PATCH 02/11] RDMA/cxgb4: register rdma provider based on LLD state_change events Steve Wise
2010-05-20 21:57 ` Steve Wise [this message]
[not found] ` <20100520215738.32394.60360.stgit-T4OLL4TyM9aNDNWfRnPdfg@public.gmane.org>
2010-05-20 22:08 ` [PATCH 03/11] RDMA/cxgb4: CQ size must be IQ size - 2 Sean Hefty
[not found] ` <27BBA4336B784434AAE16BB1126AD59C-Zpru7NauK7drdx17CPfAsdBPR1lH4CV8@public.gmane.org>
2010-05-20 22:16 ` Steve Wise
2010-05-20 21:57 ` [PATCH 04/11] RDMA/cxgb4: Optimize CQ overflow detection Steve Wise
2010-05-20 21:57 ` [PATCH 05/11] RDMA/cxgb4: Fix overflow bug in cq arm Steve Wise
2010-05-20 21:57 ` [PATCH 06/11] RDMA/cxgb4: Return proper errors in fastreg mr/pbl allocation Steve Wise
2010-05-20 21:57 ` [PATCH 07/11] RDMA/cxgb4: Don't limit fastreg page list depth Steve Wise
2010-05-20 21:58 ` [PATCH 08/11] RDMA/cxgb4: Update some HW limits Steve Wise
2010-05-20 21:58 ` [PATCH 09/11] RDMA/cxgb4: Set fence flag for inv-local-stag work requests Steve Wise
2010-05-20 21:58 ` [PATCH 10/11] RDMA/cxgb4: Support IB_WR_READ_WITH_INV opcode Steve Wise
2010-05-20 21:58 ` [PATCH 11/11] RDMA/cxgb4: Only insert sq qid in lookup table Steve Wise
2010-05-25 4:08 ` [PATCH 01/11] RDMA/cxgb4: Detach from the LLD after unregistering with the RDMA core Roland Dreier
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