From: Rahul Lakkireddy Date: Thu, 8 Oct 2015 13:46:09 +0000 (+0530) Subject: cxgbe: allow to change mtu X-Git-Tag: spdx-start~8384 X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=0ec33be4c857;p=dpdk.git cxgbe: allow to change mtu Add a mtu_set() eth_dev_ops to allow DPDK apps to modify device mtu. Signed-off-by: Rahul Lakkireddy Signed-off-by: Kumar Sanghvi --- diff --git a/drivers/net/cxgbe/cxgbe_ethdev.c b/drivers/net/cxgbe/cxgbe_ethdev.c index 6d7b29c2d0..a8e057bb05 100644 --- a/drivers/net/cxgbe/cxgbe_ethdev.c +++ b/drivers/net/cxgbe/cxgbe_ethdev.c @@ -225,6 +225,34 @@ static int cxgbe_dev_link_update(struct rte_eth_dev *eth_dev, return 0; } +static int cxgbe_dev_mtu_set(struct rte_eth_dev *eth_dev, uint16_t mtu) +{ + struct port_info *pi = (struct port_info *)(eth_dev->data->dev_private); + struct adapter *adapter = pi->adapter; + struct rte_eth_dev_info dev_info; + int err; + uint16_t new_mtu = mtu + ETHER_HDR_LEN + ETHER_CRC_LEN; + + cxgbe_dev_info_get(eth_dev, &dev_info); + + /* Must accommodate at least ETHER_MIN_MTU */ + if ((new_mtu < ETHER_MIN_MTU) || (new_mtu > dev_info.max_rx_pktlen)) + return -EINVAL; + + /* set to jumbo mode if needed */ + if (new_mtu > ETHER_MAX_LEN) + eth_dev->data->dev_conf.rxmode.jumbo_frame = 1; + else + eth_dev->data->dev_conf.rxmode.jumbo_frame = 0; + + err = t4_set_rxmode(adapter, adapter->mbox, pi->viid, new_mtu, -1, -1, + -1, -1, true); + if (!err) + eth_dev->data->dev_conf.rxmode.max_rx_pkt_len = new_mtu; + + return err; +} + static int cxgbe_dev_tx_queue_start(struct rte_eth_dev *eth_dev, uint16_t tx_queue_id); static int cxgbe_dev_rx_queue_start(struct rte_eth_dev *eth_dev, @@ -724,6 +752,7 @@ static struct eth_dev_ops cxgbe_eth_dev_ops = { .dev_configure = cxgbe_dev_configure, .dev_infos_get = cxgbe_dev_info_get, .link_update = cxgbe_dev_link_update, + .mtu_set = cxgbe_dev_mtu_set, .tx_queue_setup = cxgbe_dev_tx_queue_setup, .tx_queue_start = cxgbe_dev_tx_queue_start, .tx_queue_stop = cxgbe_dev_tx_queue_stop,