diff options
| author | Steve Wise <swise@opengridcomputing.com> | 2011-03-11 22:30:42 +0000 |
|---|---|---|
| committer | Roland Dreier <roland@purestorage.com> | 2011-03-14 12:09:11 -0700 |
| commit | ffc3f7487ff0b32500b319c770475383f6f6efab (patch) | |
| tree | 64beb59d6b0b843316a47bdae156a24893254380 /drivers | |
| parent | 294281373999e7fff393c04eb16092a8f00ad5aa (diff) | |
| download | linux-ffc3f7487ff0b32500b319c770475383f6f6efab.tar.bz2 | |
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 <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/infiniband/hw/cxgb4/t4.h | 8 |
1 files changed, 7 insertions, 1 deletions
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; |