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authorNoa Osherovich <noaos@mellanox.com>2017-10-17 18:01:12 +0300
committerDoug Ledford <dledford@redhat.com>2017-10-25 14:03:44 -0400
commitb4f34597a5ce148b88a47da621037537c384d565 (patch)
tree3a864e99cf31cdf01db976d334446e34621b4ff7
parentb156269d88e43a93da424a463e57eb5e9ee5f3cd (diff)
IB/mlx5: Expose multi-packet RQ capabilities
This patch reports the device's striding RQ capabilities to the user-space: - min/max_single_stride_log_num_of_bytes: Log of min/max number of bytes in a single stride. - min/max_single_wqe_log_num_of_strides: Log of min/max number of strides in a single WQE. - supported_qpts: A bit mask to know which QP types support multi- packet RQ, for now only Raw Packet QPs. Signed-off-by: Noa Osherovich <noaos@mellanox.com> Reviewed-by: Majd Dibbiny <majd@mellanox.com> Signed-off-by: Leon Romanovsky <leon@kernel.org> Signed-off-by: Doug Ledford <dledford@redhat.com>
-rw-r--r--drivers/infiniband/hw/mlx5/main.c16
-rw-r--r--drivers/infiniband/hw/mlx5/mlx5_ib.h5
-rw-r--r--include/uapi/rdma/mlx5-abi.h14
3 files changed, 35 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c
index 552f7bd4ecc3..02da3f58f296 100644
--- a/drivers/infiniband/hw/mlx5/main.c
+++ b/drivers/infiniband/hw/mlx5/main.c
@@ -848,6 +848,22 @@ static int mlx5_ib_query_device(struct ib_device *ibdev,
}
}
+ if (field_avail(typeof(resp), striding_rq_caps, uhw->outlen)) {
+ resp.response_length += sizeof(resp.striding_rq_caps);
+ if (MLX5_CAP_GEN(mdev, striding_rq)) {
+ resp.striding_rq_caps.min_single_stride_log_num_of_bytes =
+ MLX5_MIN_SINGLE_STRIDE_LOG_NUM_BYTES;
+ resp.striding_rq_caps.max_single_stride_log_num_of_bytes =
+ MLX5_MAX_SINGLE_STRIDE_LOG_NUM_BYTES;
+ resp.striding_rq_caps.min_single_wqe_log_num_of_strides =
+ MLX5_MIN_SINGLE_WQE_LOG_NUM_STRIDES;
+ resp.striding_rq_caps.max_single_wqe_log_num_of_strides =
+ MLX5_MAX_SINGLE_WQE_LOG_NUM_STRIDES;
+ resp.striding_rq_caps.supported_qpts =
+ BIT(IB_QPT_RAW_PACKET);
+ }
+ }
+
if (uhw->outlen) {
err = ib_copy_to_udata(uhw, &resp, resp.response_length);
diff --git a/drivers/infiniband/hw/mlx5/mlx5_ib.h b/drivers/infiniband/hw/mlx5/mlx5_ib.h
index 189e80cd6b2f..8de40852818b 100644
--- a/drivers/infiniband/hw/mlx5/mlx5_ib.h
+++ b/drivers/infiniband/hw/mlx5/mlx5_ib.h
@@ -256,6 +256,11 @@ enum mlx5_ib_wq_flags {
MLX5_IB_WQ_FLAGS_DELAY_DROP = 0x1,
};
+#define MLX5_MIN_SINGLE_WQE_LOG_NUM_STRIDES 9
+#define MLX5_MAX_SINGLE_WQE_LOG_NUM_STRIDES 16
+#define MLX5_MIN_SINGLE_STRIDE_LOG_NUM_BYTES 6
+#define MLX5_MAX_SINGLE_STRIDE_LOG_NUM_BYTES 13
+
struct mlx5_ib_rwq {
struct ib_wq ibwq;
struct mlx5_core_qp core_qp;
diff --git a/include/uapi/rdma/mlx5-abi.h b/include/uapi/rdma/mlx5-abi.h
index 1791bf123ba9..0832d9502200 100644
--- a/include/uapi/rdma/mlx5-abi.h
+++ b/include/uapi/rdma/mlx5-abi.h
@@ -190,6 +190,19 @@ struct mlx5_ib_sw_parsing_caps {
__u32 supported_qpts;
};
+struct mlx5_ib_striding_rq_caps {
+ __u32 min_single_stride_log_num_of_bytes;
+ __u32 max_single_stride_log_num_of_bytes;
+ __u32 min_single_wqe_log_num_of_strides;
+ __u32 max_single_wqe_log_num_of_strides;
+
+ /* Corresponding bit will be set if qp type from
+ * 'enum ib_qp_type' is supported, e.g.
+ * supported_qpts |= 1 << IB_QPT_RAW_PACKET
+ */
+ __u32 supported_qpts;
+};
+
struct mlx5_ib_query_device_resp {
__u32 comp_mask;
__u32 response_length;
@@ -200,6 +213,7 @@ struct mlx5_ib_query_device_resp {
__u32 mlx5_ib_support_multi_pkt_send_wqes;
__u32 reserved;
struct mlx5_ib_sw_parsing_caps sw_parsing_caps;
+ struct mlx5_ib_striding_rq_caps striding_rq_caps;
};
struct mlx5_ib_create_cq {

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