net/mlx5: disable ConnectX-4 Lx Multi Packet Send by default

[dpdk.git] / drivers / net / mlx5 / mlx5.c

diff --git a/drivers/net/mlx5/mlx5.c b/drivers/net/mlx5/mlx5.c
index ec63bc6..30d4e70 100644 (file)
--- a/drivers/net/mlx5/mlx5.c
+++ b/drivers/net/mlx5/mlx5.c
@@ -477,7 +477,7 @@ mlx5_args_check(const char *key, const char *val, void *opaque)
        } else if (strcmp(MLX5_TXQS_MIN_INLINE, key) == 0) {
                config->txqs_inline = tmp;
        } else if (strcmp(MLX5_TXQ_MPW_EN, key) == 0) {
-               config->mps = !!tmp ? config->mps : 0;
+               config->mps = !!tmp;
        } else if (strcmp(MLX5_TXQ_MPW_HDR_DSEG_EN, key) == 0) {
                config->mpw_hdr_dseg = !!tmp;
        } else if (strcmp(MLX5_TXQ_MAX_INLINE_LEN, key) == 0) {
@@ -702,6 +702,7 @@ mlx5_dev_spawn(struct rte_device *dpdk_dev,
        struct mlx5dv_context dv_attr = { .comp_mask = 0 };
        struct mlx5_dev_config config = {
                .vf = !!vf,
+               .mps = MLX5_ARG_UNSET,
                .tx_vec_en = 1,
                .rx_vec_en = 1,
                .mpw_hdr_dseg = 0,
@@ -791,7 +792,6 @@ mlx5_dev_spawn(struct rte_device *dpdk_dev,
                DRV_LOG(DEBUG, "MPW isn't supported");
                mps = MLX5_MPW_DISABLED;
        }
-       config.mps = mps;
 #ifdef HAVE_IBV_MLX5_MOD_SWP
        if (dv_attr.comp_mask & MLX5DV_CONTEXT_MASK_SWP)
                swp = dv_attr.sw_parsing_caps.sw_parsing_offloads;
@@ -1035,13 +1035,15 @@ mlx5_dev_spawn(struct rte_device *dpdk_dev,
                       (1 << IBV_QPT_RAW_PACKET)));
        if (config.tso)
                config.tso_max_payload_sz = attr.tso_caps.max_tso;
-       if (config.mps && !mps) {
-               DRV_LOG(ERR,
-                       "multi-packet send not supported on this device"
-                       " (" MLX5_TXQ_MPW_EN ")");
-               err = ENOTSUP;
-               goto error;
-       }
+       /*
+        * MPW is disabled by default, while the Enhanced MPW is enabled
+        * by default.
+        */
+       if (config.mps == MLX5_ARG_UNSET)
+               config.mps = (mps == MLX5_MPW_ENHANCED) ? MLX5_MPW_ENHANCED :
+                                                         MLX5_MPW_DISABLED;
+       else
+               config.mps = config.mps ? mps : MLX5_MPW_DISABLED;
        DRV_LOG(INFO, "%sMPS is %s",
                config.mps == MLX5_MPW_ENHANCED ? "enhanced " : "",
                config.mps != MLX5_MPW_DISABLED ? "enabled" : "disabled");