net/ixgbe: set min and max MTU for VF

This commit sets the min and max supported MTU values for ixgbe VF
devices via the ixgbevf_dev_set_mtu() function. Min MTU supported is
set to ETHER_MIN_MTU and max MTU is calculated as the max packet length
supported minus the transport overhead. As transport overhead is the
same for VF and PF ixgbe devices, reuse MACRO 'IXGBE_ETH_OVERHEAD' to
avoid duplication.

Signed-off-by: Ian Stokes <ian.stokes@intel.com>
Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>

diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_ethdev.c
index 60da350..feec856 100644 (file)
--- a/drivers/net/ixgbe/ixgbe_ethdev.c
+++ b/drivers/net/ixgbe/ixgbe_ethdev.c
@@ -3857,6 +3857,7 @@ ixgbevf_dev_info_get(struct rte_eth_dev *dev,
        dev_info->max_tx_queues = (uint16_t)hw->mac.max_tx_queues;
        dev_info->min_rx_bufsize = 1024; /* cf BSIZEPACKET in SRRCTL reg */
        dev_info->max_rx_pktlen = 9728; /* includes CRC, cf MAXFRS reg */
+       dev_info->max_mtu = dev_info->max_rx_pktlen - IXGBE_ETH_OVERHEAD;
        dev_info->max_mac_addrs = hw->mac.num_rar_entries;
        dev_info->max_hash_mac_addrs = IXGBE_VMDQ_NUM_UC_MAC;
        dev_info->max_vfs = pci_dev->max_vfs;
@@ -6344,7 +6345,7 @@ static int
 ixgbevf_dev_set_mtu(struct rte_eth_dev *dev, uint16_t mtu)
 {
        struct ixgbe_hw *hw;
-       uint32_t max_frame = mtu + ETHER_HDR_LEN + ETHER_CRC_LEN;
+       uint32_t max_frame = mtu + IXGBE_ETH_OVERHEAD;
        struct rte_eth_rxmode *rx_conf = &dev->data->dev_conf.rxmode;
 
        hw = IXGBE_DEV_PRIVATE_TO_HW(dev->data->dev_private);