net/mlx5: support hardware TSO

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

diff --git a/drivers/net/mlx5/mlx5.c b/drivers/net/mlx5/mlx5.c
index 4a6450c..c258e43 100644 (file)
--- a/drivers/net/mlx5/mlx5.c
+++ b/drivers/net/mlx5/mlx5.c
@@ -84,6 +84,9 @@
 /* Device parameter to enable multi-packet send WQEs. */
 #define MLX5_TXQ_MPW_EN "txq_mpw_en"
 
+/* Device parameter to enable hardware TSO offload. */
+#define MLX5_TSO "tso"
+
 /**
  * Retrieve integer value from environment variable.
  *
@@ -292,6 +295,8 @@ mlx5_args_check(const char *key, const char *val, void *opaque)
                priv->txqs_inline = tmp;
        } else if (strcmp(MLX5_TXQ_MPW_EN, key) == 0) {
                priv->mps &= !!tmp; /* Enable MPW only if HW supports */
+       } else if (strcmp(MLX5_TSO, key) == 0) {
+               priv->tso = !!tmp;
        } else {
                WARN("%s: unknown parameter", key);
                return -EINVAL;
@@ -318,6 +323,7 @@ mlx5_args(struct priv *priv, struct rte_devargs *devargs)
                MLX5_TXQ_INLINE,
                MLX5_TXQS_MIN_INLINE,
                MLX5_TXQ_MPW_EN,
+               MLX5_TSO,
                NULL,
        };
        struct rte_kvargs *kvlist;
@@ -481,6 +487,7 @@ mlx5_pci_probe(struct rte_pci_driver *pci_drv, struct rte_pci_device *pci_dev)
                        IBV_EXP_DEVICE_ATTR_RX_HASH |
                        IBV_EXP_DEVICE_ATTR_VLAN_OFFLOADS |
                        IBV_EXP_DEVICE_ATTR_RX_PAD_END_ALIGN |
+                       IBV_EXP_DEVICE_ATTR_TSO_CAPS |
                        0;
 
                DEBUG("using port %u (%08" PRIx32 ")", port, test);
@@ -582,11 +589,22 @@ mlx5_pci_probe(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->tso = ((priv->tso) &&
+                           (exp_device_attr.tso_caps.max_tso > 0) &&
+                           (exp_device_attr.tso_caps.supported_qpts &
+                           (1 << IBV_QPT_RAW_ETH)));
+               if (priv->tso)
+                       priv->max_tso_payload_sz =
+                               exp_device_attr.tso_caps.max_tso;
                if (priv->mps && !mps) {
                        ERROR("multi-packet send not supported on this device"
                              " (" MLX5_TXQ_MPW_EN ")");
                        err = ENOTSUP;
                        goto port_error;
+               } else if (priv->mps && priv->tso) {
+                       WARN("multi-packet send not supported in conjunction "
+                             "with TSO. MPS disabled");
+                       priv->mps = 0;
                }
                /* Allocate and register default RSS hash keys. */
                priv->rss_conf = rte_calloc(__func__, hash_rxq_init_n,