net/vmxnet3: support MTU set

(Picked up from @Charles Myers patch
https://patchwork.dpdk.org/patch/57771/)

When the mtu_set() function is not implemented, rte_eth_dev_set_mtu()
fails with -ENOTSUP and mtu is not stored in the mtu field in the
rte_eth_dev_data.  This causes the mtu in Vmxnet3_MiscConf which is
shared with hypervisor to always be set to 1500.

This may cause issues receiving jumbo frames on Enhanced Data Path
N-VDS.

Signed-off-by: Eduard Serra <eserra@vmware.com>
Acked-by: Yong Wang <yongwang@vmware.com>

diff --git a/drivers/net/vmxnet3/vmxnet3_ethdev.c b/drivers/net/vmxnet3/vmxnet3_ethdev.c
index 705e976..c6e11ad 100644 (file)
--- a/drivers/net/vmxnet3/vmxnet3_ethdev.c
+++ b/drivers/net/vmxnet3/vmxnet3_ethdev.c
@@ -87,6 +87,7 @@ static int vmxnet3_dev_info_get(struct rte_eth_dev *dev,
                                struct rte_eth_dev_info *dev_info);
 static const uint32_t *
 vmxnet3_dev_supported_ptypes_get(struct rte_eth_dev *dev);
+static int vmxnet3_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu);
 static int vmxnet3_dev_vlan_filter_set(struct rte_eth_dev *dev,
                                       uint16_t vid, int on);
 static int vmxnet3_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask);
@@ -124,6 +125,7 @@ static const struct eth_dev_ops vmxnet3_eth_dev_ops = {
        .mac_addr_set         = vmxnet3_mac_addr_set,
        .dev_infos_get        = vmxnet3_dev_info_get,
        .dev_supported_ptypes_get = vmxnet3_dev_supported_ptypes_get,
+       .mtu_set              = vmxnet3_dev_mtu_set,
        .vlan_filter_set      = vmxnet3_dev_vlan_filter_set,
        .vlan_offload_set     = vmxnet3_dev_vlan_offload_set,
        .rx_queue_setup       = vmxnet3_dev_rx_queue_setup,
@@ -1166,6 +1168,8 @@ vmxnet3_dev_info_get(struct rte_eth_dev *dev,
        dev_info->max_tx_queues = VMXNET3_MAX_TX_QUEUES;
        dev_info->min_rx_bufsize = 1518 + RTE_PKTMBUF_HEADROOM;
        dev_info->max_rx_pktlen = 16384; /* includes CRC, cf MAXFRS register */
+       dev_info->min_mtu = VMXNET3_MIN_MTU;
+       dev_info->max_mtu = VMXNET3_MAX_MTU;
        dev_info->speed_capa = ETH_LINK_SPEED_10G;
        dev_info->max_mac_addrs = VMXNET3_MAX_MAC_ADDRS;
 
@@ -1211,6 +1215,18 @@ vmxnet3_dev_supported_ptypes_get(struct rte_eth_dev *dev)
        return NULL;
 }
 
+static int
+vmxnet3_dev_mtu_set(struct rte_eth_dev *dev, __rte_unused uint16_t mtu)
+{
+       if (dev->data->dev_started) {
+               PMD_DRV_LOG(ERR, "Port %d must be stopped to configure MTU",
+                           dev->data->port_id);
+               return -EBUSY;
+       }
+
+       return 0;
+}
+
 static int
 vmxnet3_mac_addr_set(struct rte_eth_dev *dev, struct rte_ether_addr *mac_addr)
 {