net/mlx5: support multi-packet send

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

diff --git a/drivers/net/mlx5/mlx5.c b/drivers/net/mlx5/mlx5.c
index 73069d2..5aa4adc 100644 (file)
--- a/drivers/net/mlx5/mlx5.c
+++ b/drivers/net/mlx5/mlx5.c
@@ -81,6 +81,9 @@
  */
 #define MLX5_TXQS_MIN_INLINE "txqs_min_inline"
 
+/* Device parameter to enable multi-packet send WQEs. */
+#define MLX5_TXQ_MPW_EN "txq_mpw_en"
+
 /**
  * Retrieve integer value from environment variable.
  *
@@ -282,6 +285,8 @@ mlx5_args_check(const char *key, const char *val, void *opaque)
                priv->txq_inline = tmp;
        } else if (strcmp(MLX5_TXQS_MIN_INLINE, key) == 0) {
                priv->txqs_inline = tmp;
+       } else if (strcmp(MLX5_TXQ_MPW_EN, key) == 0) {
+               priv->mps = !!tmp;
        } else {
                WARN("%s: unknown parameter", key);
                return -EINVAL;
@@ -307,6 +312,7 @@ mlx5_args(struct priv *priv, struct rte_devargs *devargs)
                MLX5_RXQ_CQE_COMP_EN,
                MLX5_TXQ_INLINE,
                MLX5_TXQS_MIN_INLINE,
+               MLX5_TXQ_MPW_EN,
                NULL,
        };
        struct rte_kvargs *kvlist;
@@ -503,6 +509,7 @@ mlx5_pci_devinit(struct rte_pci_driver *pci_drv, struct rte_pci_device *pci_dev)
                priv->port = port;
                priv->pd = pd;
                priv->mtu = ETHER_MTU;
+               priv->mps = mps; /* Enable MPW by default if supported. */
                priv->cqe_comp = 1; /* Enable compression by default. */
                err = mlx5_args(priv, pci_dev->devargs);
                if (err) {
@@ -551,7 +558,12 @@ mlx5_pci_devinit(struct rte_pci_driver *pci_drv, struct rte_pci_device *pci_dev)
 
                priv_get_num_vfs(priv, &num_vfs);
                priv->sriov = (num_vfs || sriov);
-               priv->mps = mps;
+               if (priv->mps && !mps) {
+                       ERROR("multi-packet send not supported on this device"
+                             " (" MLX5_TXQ_MPW_EN ")");
+                       err = ENOTSUP;
+                       goto port_error;
+               }
                /* Allocate and register default RSS hash keys. */
                priv->rss_conf = rte_calloc(__func__, hash_rxq_init_n,
                                            sizeof((*priv->rss_conf)[0]), 0);