[PATCH rdma-next v1 2/3] IB/mlx5: Expose ODP for DC capabilities to user

[Leon Romanovsky <leon@kernel.org>]

From: Michael Guralnik <michaelgur@mellanox.com>

Return ODP capabilities for DC to user in alloc_context.

Signed-off-by: Michael Guralnik <michaelgur@mellanox.com>
Reviewed-by: Moni Shoua <monis@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
---
 drivers/infiniband/hw/mlx5/main.c | 6 ++++++
 include/uapi/rdma/mlx5-abi.h      | 3 +++
 2 files changed, 9 insertions(+)

diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c
index 4a3d700cd783..a53e0dc7c17f 100644
--- a/drivers/infiniband/hw/mlx5/main.c
+++ b/drivers/infiniband/hw/mlx5/main.c
@@ -1954,6 +1954,12 @@ static int mlx5_ib_alloc_ucontext(struct ib_ucontext *uctx,
 		resp.response_length += sizeof(resp.dump_fill_mkey);
 	}
 
+	if (field_avail(typeof(resp), dc_odp_caps, udata->outlen)) {
+		resp.dc_odp_caps = dev->dc_odp_caps;
+		resp.comp_mask |= MLX5_IB_ALLOC_UCONTEXT_RESP_MASK_DC_ODP_CAPS;
+		resp.response_length += sizeof(resp.dc_odp_caps);
+	}
+
 	err = ib_copy_to_udata(udata, &resp, resp.response_length);
 	if (err)
 		goto out_mdev;
diff --git a/include/uapi/rdma/mlx5-abi.h b/include/uapi/rdma/mlx5-abi.h
index 624f5b53eb1f..7cab806d7fa7 100644
--- a/include/uapi/rdma/mlx5-abi.h
+++ b/include/uapi/rdma/mlx5-abi.h
@@ -98,6 +98,7 @@ struct mlx5_ib_alloc_ucontext_req_v2 {
 enum mlx5_ib_alloc_ucontext_resp_mask {
 	MLX5_IB_ALLOC_UCONTEXT_RESP_MASK_CORE_CLOCK_OFFSET = 1UL << 0,
 	MLX5_IB_ALLOC_UCONTEXT_RESP_MASK_DUMP_FILL_MKEY    = 1UL << 1,
+	MLX5_IB_ALLOC_UCONTEXT_RESP_MASK_DC_ODP_CAPS	   = 1UL << 2,
 };
 
 enum mlx5_user_cmds_supp_uhw {
@@ -147,6 +148,8 @@ struct mlx5_ib_alloc_ucontext_resp {
 	__u32	num_uars_per_page;
 	__u32	num_dyn_bfregs;
 	__u32	dump_fill_mkey;
+	__u32	dc_odp_caps;
+	__u32   reserved;
 };
 
 struct mlx5_ib_alloc_pd_resp {
-- 
2.20.1