Multi-Packet RQ can further save PCIe bandwidth by posting a single large
buffer for multiple packets.
Instead of posting a buffer per a packet, one large buffer is posted
to receive multiple packets on the buffer.
Add support for multi-packet RQ on Windows.
The feature is disabled by default and can by enabled
by setting mprq_en=1 in the PMD specific arguments.
Signed-off-by: Tal Shnaiderman <tal...@nvidia.com>
---
drivers/common/mlx5/mlx5_devx_cmds.c | 3 +++
drivers/common/mlx5/mlx5_devx_cmds.h | 2 ++
drivers/common/mlx5/windows/mlx5_win_defs.h | 7 +++++++
drivers/net/mlx5/windows/mlx5_os.c | 26 ++++++++++++++++++++++++++
4 files changed, 38 insertions(+)
diff --git a/drivers/common/mlx5/mlx5_devx_cmds.c
b/drivers/common/mlx5/mlx5_devx_cmds.c
index d02ac2a678..7900254287 100644
--- a/drivers/common/mlx5/mlx5_devx_cmds.c
+++ b/drivers/common/mlx5/mlx5_devx_cmds.c
@@ -970,6 +970,9 @@ mlx5_devx_cmd_query_hca_attr(void *ctx,
general_obj_types) &
MLX5_GENERAL_OBJ_TYPES_CAP_CONN_TRACK_OFFLOAD);
attr->rq_delay_drop = MLX5_GET(cmd_hca_cap, hcattr, rq_delay_drop);
+ attr->striding_rq = MLX5_GET(cmd_hca_cap, hcattr, striding_rq);
+ attr->ext_stride_num_range =
+ MLX5_GET(cmd_hca_cap, hcattr, ext_stride_num_range);
if (hca_cap_2_sup) {
hcattr = mlx5_devx_get_hca_cap(ctx, in, out, &rc,
MLX5_GET_HCA_CAP_OP_MOD_GENERAL_DEVICE_2 |
diff --git a/drivers/common/mlx5/mlx5_devx_cmds.h
b/drivers/common/mlx5/mlx5_devx_cmds.h
index 1bac18c59d..2d813c0fdc 100644
--- a/drivers/common/mlx5/mlx5_devx_cmds.h
+++ b/drivers/common/mlx5/mlx5_devx_cmds.h
@@ -256,6 +256,8 @@ struct mlx5_hca_attr {
uint32_t esw_mgr_vport_id_valid:1; /* E-Switch Mgr vport ID is valid. */
uint16_t esw_mgr_vport_id; /* E-Switch Mgr vport ID . */
uint16_t max_wqe_sz_sq;
+ uint32_t striding_rq:1;
+ uint32_t ext_stride_num_range:1;
};
/* LAG Context. */
diff --git a/drivers/common/mlx5/windows/mlx5_win_defs.h
b/drivers/common/mlx5/windows/mlx5_win_defs.h
index 3554e4a7ff..822104a109 100644
--- a/drivers/common/mlx5/windows/mlx5_win_defs.h
+++ b/drivers/common/mlx5/windows/mlx5_win_defs.h
@@ -258,4 +258,11 @@ enum {
MLX5_MATCH_MISC_PARAMETERS = 1 << 1,
MLX5_MATCH_INNER_HEADERS = 1 << 2,
};
+
+#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
+#define MLX5_EXT_MIN_SINGLE_WQE_LOG_NUM_STRIDES 3
+#define IB_QPT_RAW_PACKET 8
#endif /* __MLX5_WIN_DEFS_H__ */
diff --git a/drivers/net/mlx5/windows/mlx5_os.c
b/drivers/net/mlx5/windows/mlx5_os.c
index c7bb81549e..02438ece56 100644
--- a/drivers/net/mlx5/windows/mlx5_os.c
+++ b/drivers/net/mlx5/windows/mlx5_os.c
@@ -187,6 +187,32 @@ mlx5_os_capabilities_prepare(struct mlx5_dev_ctx_shared
*sh)
if (sh->dev_cap.tso)
sh->dev_cap.tso_max_payload_sz = 1 << hca_attr->max_lso_cap;
DRV_LOG(DEBUG, "Counters are not supported.");
+ if (hca_attr->striding_rq) {
+ sh->dev_cap.mprq.enabled = 1;
+ sh->dev_cap.mprq.log_min_stride_size =
+ MLX5_MIN_SINGLE_STRIDE_LOG_NUM_BYTES;
+ sh->dev_cap.mprq.log_max_stride_size =
+ MLX5_MAX_SINGLE_STRIDE_LOG_NUM_BYTES;
+ if (hca_attr->ext_stride_num_range)
+ sh->dev_cap.mprq.log_min_stride_num =
+ MLX5_EXT_MIN_SINGLE_WQE_LOG_NUM_STRIDES;
+ else
+ sh->dev_cap.mprq.log_min_stride_num =
+ MLX5_MIN_SINGLE_WQE_LOG_NUM_STRIDES;
+ sh->dev_cap.mprq.log_max_stride_num =
+ MLX5_MAX_SINGLE_WQE_LOG_NUM_STRIDES;
+ DRV_LOG(DEBUG, "\tmin_single_stride_log_num_of_bytes: %u",
+ sh->dev_cap.mprq.log_min_stride_size);
+ DRV_LOG(DEBUG, "\tmax_single_stride_log_num_of_bytes: %u",
+ sh->dev_cap.mprq.log_max_stride_size);
+ DRV_LOG(DEBUG, "\tmin_single_wqe_log_num_of_strides: %u",
+ sh->dev_cap.mprq.log_min_stride_num);
+ DRV_LOG(DEBUG, "\tmax_single_wqe_log_num_of_strides: %u",
+ sh->dev_cap.mprq.log_max_stride_num);
+ DRV_LOG(DEBUG, "\tmin_stride_wqe_log_size: %u",
+ sh->dev_cap.mprq.log_min_stride_wqe_size);
+ DRV_LOG(DEBUG, "Device supports Multi-Packet RQ.");
+ }
if (hca_attr->rss_ind_tbl_cap) {
/*
* DPDK doesn't support larger/variable indirection tables.
--
2.16.1.windows.4
