This patch enables configuring MTU for i40e. Since changing MTU needs to reconfigure queue, stop port first before configuring MTU.
Signed-off-by: Beilei Xing <beilei.xing at intel.com> --- v4 changes: Revert v2 change, if the port is running, return -EBUSY. doc/guides/rel_notes/release_16_07.rst | 3 +++ drivers/net/i40e/i40e_ethdev.c | 34 ++++++++++++++++++++++++++++++++++ lib/librte_ether/rte_ethdev.h | 1 + 3 files changed, 38 insertions(+) diff --git a/doc/guides/rel_notes/release_16_07.rst b/doc/guides/rel_notes/release_16_07.rst index 30e78d4..4b1c176 100644 --- a/doc/guides/rel_notes/release_16_07.rst +++ b/doc/guides/rel_notes/release_16_07.rst @@ -116,6 +116,9 @@ API Changes ibadcrc, ibadlen, imcasts, fdirmatch, fdirmiss, tx_pause_xon, rx_pause_xon, tx_pause_xoff, rx_pause_xoff. +* The function ``rte_eth_dev_set_mtu`` adds a new return value ``-EBUSY``, which + indicates the operation is forbidden because the port is running. + ABI Changes ----------- diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c index 24777d5..ffccaae 100644 --- a/drivers/net/i40e/i40e_ethdev.c +++ b/drivers/net/i40e/i40e_ethdev.c @@ -447,6 +447,8 @@ static int i40e_get_eeprom(struct rte_eth_dev *dev, static void i40e_set_default_mac_addr(struct rte_eth_dev *dev, struct ether_addr *mac_addr); +static int i40e_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu); + static const struct rte_pci_id pci_id_i40e_map[] = { #define RTE_PCI_DEV_ID_DECL_I40E(vend, dev) {RTE_PCI_DEVICE(vend, dev)}, #include "rte_pci_dev_ids.h" @@ -520,6 +522,7 @@ static const struct eth_dev_ops i40e_eth_dev_ops = { .get_eeprom_length = i40e_get_eeprom_length, .get_eeprom = i40e_get_eeprom, .mac_addr_set = i40e_set_default_mac_addr, + .mtu_set = i40e_dev_mtu_set, }; /* store statistics names and its offset in stats structure */ @@ -9108,3 +9111,34 @@ static void i40e_set_default_mac_addr(struct rte_eth_dev *dev, /* Flags: 0x3 updates port address */ i40e_aq_mac_address_write(hw, 0x3, mac_addr->addr_bytes, NULL); } + +static int +i40e_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu) +{ + struct i40e_pf *pf = I40E_DEV_PRIVATE_TO_PF(dev->data->dev_private); + struct rte_eth_dev_data *dev_data = pf->dev_data; + uint32_t frame_size = mtu + ETHER_HDR_LEN + + ETHER_CRC_LEN + I40E_VLAN_TAG_SIZE; + int ret = 0; + + /* check if mtu is within the allowed range */ + if ((mtu < ETHER_MIN_MTU) || (frame_size > I40E_FRAME_SIZE_MAX)) + return -EINVAL; + + /* mtu setting is forbidden if port is start */ + if (dev_data->dev_started) { + PMD_DRV_LOG(ERR, + "port %d must be stopped before configuration\n", + dev_data->port_id); + return -EBUSY; + } + + if (frame_size > ETHER_MAX_LEN) + dev_data->dev_conf.rxmode.jumbo_frame = 1; + else + dev_data->dev_conf.rxmode.jumbo_frame = 0; + + dev_data->dev_conf.rxmode.max_rx_pkt_len = frame_size; + + return ret; +} diff --git a/lib/librte_ether/rte_ethdev.h b/lib/librte_ether/rte_ethdev.h index 2757510..a8d9963 100644 --- a/lib/librte_ether/rte_ethdev.h +++ b/lib/librte_ether/rte_ethdev.h @@ -2398,6 +2398,7 @@ int rte_eth_dev_get_mtu(uint8_t port_id, uint16_t *mtu); * - (-ENOTSUP) if operation is not supported. * - (-ENODEV) if *port_id* invalid. * - (-EINVAL) if *mtu* invalid. + * - (-EBUSY) if operation is not allowed when the port is running */ int rte_eth_dev_set_mtu(uint8_t port_id, uint16_t mtu); -- 2.5.0