iw_cxgb4: set correct FetchBurstMax for QPs

The current QP FetchBurstMax value is 256B, which
is incorrect since a WR can exceed that value.  The
result being a partial WR fetched by hardware, and
a fatal "bad WR" error posted by the SGE.

So bump the FetchBurstMax to 512B.

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

diff --git a/drivers/infiniband/hw/cxgb4/qp.c b/drivers/infiniband/hw/cxgb4/qp.c
index f57deba6717ce69d08b12842ea7ff5fa8514c67a..108c8837ba58ac7ad5508efba8bc21b6b5729132 100644 (file)
--- a/drivers/infiniband/hw/cxgb4/qp.c
+++ b/drivers/infiniband/hw/cxgb4/qp.c
@@ -321,7 +321,8 @@ static int create_qp(struct c4iw_rdev *rdev, struct t4_wq *wq,
                FW_RI_RES_WR_DCAEN_V(0) |
                FW_RI_RES_WR_DCACPU_V(0) |
                FW_RI_RES_WR_FBMIN_V(2) |
-               FW_RI_RES_WR_FBMAX_V(2) |
+               (t4_sq_onchip(&wq->sq) ? FW_RI_RES_WR_FBMAX_V(2) :
+                                        FW_RI_RES_WR_FBMAX_V(3)) |
                FW_RI_RES_WR_CIDXFTHRESHO_V(0) |
                FW_RI_RES_WR_CIDXFTHRESH_V(0) |
                FW_RI_RES_WR_EQSIZE_V(eqsize));
@@ -345,7 +346,7 @@ static int create_qp(struct c4iw_rdev *rdev, struct t4_wq *wq,
                FW_RI_RES_WR_DCAEN_V(0) |
                FW_RI_RES_WR_DCACPU_V(0) |
                FW_RI_RES_WR_FBMIN_V(2) |
-               FW_RI_RES_WR_FBMAX_V(2) |
+               FW_RI_RES_WR_FBMAX_V(3) |
                FW_RI_RES_WR_CIDXFTHRESHO_V(0) |
                FW_RI_RES_WR_CIDXFTHRESH_V(0) |
                FW_RI_RES_WR_EQSIZE_V(eqsize));