iw_cxgb4: set correct FetchBurstMax for QPs

commit b414fa01c31318383ae29d9d23cb9ca4184bbd86 upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/infiniband/hw/cxgb4/qp.c b/drivers/infiniband/hw/cxgb4/qp.c
index bb0fde6..cc2243f 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));