diff mbox series

[v2,5/7] net/ixgbe: set min and max MTU for ixgbe VF devices

Message ID 1553259678-4515-6-git-send-email-ian.stokes@intel.com (mailing list archive)
State Changes Requested, archived
Delegated to: Ferruh Yigit
Headers
Series ethdev: add min/max MTU to device info |

Checks

Context Check Description
ci/checkpatch success coding style OK
ci/Intel-compilation success Compilation OK

Commit Message

Ian Stokes March 22, 2019, 1:01 p.m. UTC 
  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>
---
 drivers/net/ixgbe/ixgbe_ethdev.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_ethdev.c
index 60da3508c..feec85634 100644
--- 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);