[dpdk-dev] [PATCH v3 13/17] net/txgbe: support to update MTU on VF device
From: Jiawen Wu <jiawenwu@trustnetic.com>
Date: 2021-02-25 08:10:14
Subsystem:
networking drivers, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
Add MTU set operation for VF device. Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com> --- doc/guides/nics/features/txgbe_vf.ini | 1 + drivers/net/txgbe/txgbe_ethdev_vf.c | 36 +++++++++++++++++++++++++++ 2 files changed, 37 insertions(+)
diff --git a/doc/guides/nics/features/txgbe_vf.ini b/doc/guides/nics/features/txgbe_vf.ini
index ba1812e17..69304baa9 100644
--- a/doc/guides/nics/features/txgbe_vf.ini
+++ b/doc/guides/nics/features/txgbe_vf.ini@@ -8,6 +8,7 @@ Link status = Y Unicast MAC filter = Y Multicast MAC filter = Y Rx interrupt = Y +MTU update = Y Jumbo frame = Y Scattered Rx = Y LRO = Y
diff --git a/drivers/net/txgbe/txgbe_ethdev_vf.c b/drivers/net/txgbe/txgbe_ethdev_vf.c
index b9d55debf..aa1b46766 100644
--- a/drivers/net/txgbe/txgbe_ethdev_vf.c
+++ b/drivers/net/txgbe/txgbe_ethdev_vf.c@@ -910,6 +910,41 @@ txgbevf_set_default_mac_addr(struct rte_eth_dev *dev, return 0; } +static int +txgbevf_dev_set_mtu(struct rte_eth_dev *dev, uint16_t mtu) +{ + struct txgbe_hw *hw; + uint32_t max_frame = mtu + RTE_ETHER_HDR_LEN + RTE_ETHER_CRC_LEN; + struct rte_eth_rxmode *rx_conf = &dev->data->dev_conf.rxmode; + + hw = TXGBE_DEV_HW(dev); + + if (mtu < RTE_ETHER_MIN_MTU || + max_frame > RTE_ETHER_MAX_JUMBO_FRAME_LEN) + return -EINVAL; + + /* refuse mtu that requires the support of scattered packets when this + * feature has not been enabled before. + */ + if (!(rx_conf->offloads & DEV_RX_OFFLOAD_SCATTER) && + (max_frame + 2 * TXGBE_VLAN_TAG_SIZE > + dev->data->min_rx_buf_size - RTE_PKTMBUF_HEADROOM)) + return -EINVAL; + + /* + * When supported by the underlying PF driver, use the TXGBE_VF_SET_MTU + * request of the version 2.0 of the mailbox API. + * For now, use the TXGBE_VF_SET_LPE request of the version 1.0 + * of the mailbox API. + */ + if (txgbevf_rlpml_set_vf(hw, max_frame)) + return -EINVAL; + + /* update max frame size */ + dev->data->dev_conf.rxmode.max_rx_pkt_len = max_frame; + return 0; +} + static int txgbevf_dev_promiscuous_enable(struct rte_eth_dev *dev) {
@@ -1073,6 +1108,7 @@ static const struct eth_dev_ops txgbevf_eth_dev_ops = { .allmulticast_enable = txgbevf_dev_allmulticast_enable, .allmulticast_disable = txgbevf_dev_allmulticast_disable, .dev_infos_get = txgbevf_dev_info_get, + .mtu_set = txgbevf_dev_set_mtu, .vlan_filter_set = txgbevf_vlan_filter_set, .vlan_strip_queue_set = txgbevf_vlan_strip_queue_set, .vlan_offload_set = txgbevf_vlan_offload_set,
--
2.27.0