net/mlx4: restore UDP RSS by probing capabilities

[dpdk.git] / drivers / net / mlx4 / mlx4.c

diff --git a/drivers/net/mlx4/mlx4.c b/drivers/net/mlx4/mlx4.c
index f9e4f9d..025b887 100644 (file)
--- a/drivers/net/mlx4/mlx4.c
+++ b/drivers/net/mlx4/mlx4.c
@@ -426,6 +426,7 @@ mlx4_pci_probe(struct rte_pci_driver *pci_drv, struct rte_pci_device *pci_dev)
        int err = 0;
        struct ibv_context *attr_ctx = NULL;
        struct ibv_device_attr device_attr;
+       struct ibv_device_attr_ex device_attr_ex;
        struct mlx4_conf conf = {
                .ports.present = 0,
        };
@@ -499,6 +500,11 @@ mlx4_pci_probe(struct rte_pci_driver *pci_drv, struct rte_pci_device *pci_dev)
        /* Use all ports when none are defined */
        if (!conf.ports.enabled)
                conf.ports.enabled = conf.ports.present;
+       /* Retrieve extended device attributes. */
+       if (ibv_query_device_ex(attr_ctx, NULL, &device_attr_ex)) {
+               rte_errno = ENODEV;
+               goto error;
+       }
        for (i = 0; i < device_attr.phys_port_cnt; i++) {
                uint32_t port = i + 1; /* ports are indexed from one */
                struct ibv_context *ctx = NULL;
@@ -573,6 +579,20 @@ mlx4_pci_probe(struct rte_pci_driver *pci_drv, struct rte_pci_device *pci_dev)
                         PCI_DEVICE_ID_MELLANOX_CONNECTX3PRO);
                DEBUG("L2 tunnel checksum offloads are %ssupported",
                      (priv->hw_csum_l2tun ? "" : "not "));
+               priv->hw_rss_sup = device_attr_ex.rss_caps.rx_hash_fields_mask;
+               if (!priv->hw_rss_sup) {
+                       WARN("no RSS capabilities reported; disabling support"
+                            " for UDP RSS");
+                       /* Fake support for all possible RSS hash fields. */
+                       priv->hw_rss_sup = ~UINT64_C(0);
+                       priv->hw_rss_sup = mlx4_conv_rss_hf(priv, -1);
+                       /* Filter out known unsupported fields. */
+                       priv->hw_rss_sup &=
+                               ~(uint64_t)(IBV_RX_HASH_SRC_PORT_UDP |
+                                           IBV_RX_HASH_DST_PORT_UDP);
+               }
+               DEBUG("supported RSS hash fields mask: %016" PRIx64,
+                     priv->hw_rss_sup);
                /* Configure the first MAC address by default. */
                if (mlx4_get_mac(priv, &mac.addr_bytes)) {
                        ERROR("cannot get MAC address, is mlx4_en loaded?"