diff options
| author | Jack Morgenstein <jackm@dev.mellanox.co.il> | 2009-06-05 10:36:24 -0700 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2009-06-05 10:36:24 -0700 |
| commit | 2ac6bf4ddc87c3b6b609f8fa82f6ebbffeac12f4 (patch) | |
| tree | 7de468eac9f948f85faebb2f86efbfd66737d8d9 | |
| parent | ab6bf42e2339580b5d87746d0ff4da4b1578b03e (diff) | |
IB/mlx4: Add strong ordering to local inval and fast reg work requests
The ConnectX Programmer's Reference Manual states that the "SO" bit
must be set when posting Fast Register and Local Invalidate send work
requests. When this bit is set, the work request will be executed
only after all previous work requests on the send queue have been
executed. (If the bit is not set, Fast Register and Local Invalidate
WQEs may begin execution too early, which violates the defined
semantics for these operations)
This fixes the issue with NFS/RDMA reported in
<http://lists.openfabrics.org/pipermail/general/2009-April/059253.html>
Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Cc: <stable@kernel.org>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
| -rw-r--r-- | drivers/infiniband/hw/mlx4/qp.c | 4 | ||||
| -rw-r--r-- | include/linux/mlx4/qp.h | 1 |
2 files changed, 5 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/mlx4/qp.c b/drivers/infiniband/hw/mlx4/qp.c index 20724aee76f..c4a02648c8a 100644 --- a/drivers/infiniband/hw/mlx4/qp.c +++ b/drivers/infiniband/hw/mlx4/qp.c @@ -1585,12 +1585,16 @@ int mlx4_ib_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr, break; case IB_WR_LOCAL_INV: + ctrl->srcrb_flags |= + cpu_to_be32(MLX4_WQE_CTRL_STRONG_ORDER); set_local_inv_seg(wqe, wr->ex.invalidate_rkey); wqe += sizeof (struct mlx4_wqe_local_inval_seg); size += sizeof (struct mlx4_wqe_local_inval_seg) / 16; break; case IB_WR_FAST_REG_MR: + ctrl->srcrb_flags |= + cpu_to_be32(MLX4_WQE_CTRL_STRONG_ORDER); set_fmr_seg(wqe, wr); wqe += sizeof (struct mlx4_wqe_fmr_seg); size += sizeof (struct mlx4_wqe_fmr_seg) / 16; diff --git a/include/linux/mlx4/qp.h b/include/linux/mlx4/qp.h index bf8f11982da..9f29d86e5dc 100644 --- a/include/linux/mlx4/qp.h +++ b/include/linux/mlx4/qp.h @@ -165,6 +165,7 @@ enum { MLX4_WQE_CTRL_IP_CSUM = 1 << 4, MLX4_WQE_CTRL_TCP_UDP_CSUM = 1 << 5, MLX4_WQE_CTRL_INS_VLAN = 1 << 6, + MLX4_WQE_CTRL_STRONG_ORDER = 1 << 7, }; struct mlx4_wqe_ctrl_seg { |