This is a note to let you know that I've just added the patch titled

net/mlx5: Define interface bits for fencing UMR wqe

to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: net-mlx5-define-interface-bits-for-fencing-umr-wqe.patch and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From 1410a90ae449061b7e1ae19d275148f36948801b Mon Sep 17 00:00:00 2001

From: Max Gurtovoy maxg@mellanox.com Date: Sun, 28 May 2017 10:53:10 +0300 Subject: net/mlx5: Define interface bits for fencing UMR wqe

From: Max Gurtovoy maxg@mellanox.com

commit 1410a90ae449061b7e1ae19d275148f36948801b upstream.

HW can implement UMR wqe re-transmission in various ways. Thus, add HCA cap to distinguish the needed fence for UMR to make sure that the wqe wouldn't fail on mkey checks.

Signed-off-by: Max Gurtovoy maxg@mellanox.com Acked-by: Leon Romanovsky leon@kernel.org Reviewed-by: Christoph Hellwig hch@lst.de Signed-off-by: Doug Ledford dledford@redhat.com Cc: Marta Rybczynska mrybczyn@kalray.eu Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- include/linux/mlx5/mlx5_ifc.h | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-)

--- a/include/linux/mlx5/mlx5_ifc.h +++ b/include/linux/mlx5/mlx5_ifc.h @@ -737,6 +737,12 @@ enum { MLX5_CAP_PORT_TYPE_ETH = 0x1, };

+enum { + MLX5_CAP_UMR_FENCE_STRONG = 0x0, + MLX5_CAP_UMR_FENCE_SMALL = 0x1, + MLX5_CAP_UMR_FENCE_NONE = 0x2, +}; + struct mlx5_ifc_cmd_hca_cap_bits { u8 reserved_at_0[0x80];

@@ -838,7 +844,9 @@ struct mlx5_ifc_cmd_hca_cap_bits { u8 striding_rq[0x1]; u8 reserved_at_201[0x2]; u8 ipoib_basic_offloads[0x1]; - u8 reserved_at_205[0xa]; + u8 reserved_at_205[0x5]; + u8 umr_fence[0x2]; + u8 reserved_at_20c[0x3]; u8 drain_sigerr[0x1]; u8 cmdif_checksum[0x2]; u8 sigerr_cqe[0x1];

Patches currently in stable-queue which might be from maxg@mellanox.com are

queue-4.9/net-mlx5-define-interface-bits-for-fencing-umr-wqe.patch queue-4.9/rdma-mlx5-set-umr-wqe-fence-according-to-hca-cap.patch