From: Noa Osherovich <noaos@mellanox.com>
Date: Tue, 17 Oct 2017 18:01:12 +0300
Subject: IB/mlx5: Expose multi-packet RQ capabilities
Patch-mainline: v4.15-rc1
Git-commit: b4f34597a5ce148b88a47da621037537c384d565
References: bsc#1103991 FATE#326007
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>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/infiniband/hw/mlx5/main.c | 16 ++++++++++++++++
drivers/infiniband/hw/mlx5/mlx5_ib.h | 5 +++++
include/uapi/rdma/mlx5-abi.h | 14 ++++++++++++++
3 files changed, 35 insertions(+)
--- 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 i
}
}
+ 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);
--- 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;
--- 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 {