diff --git a/drivers/net/thunderx/nicvf_ethdev.c b/drivers/net/thunderx/nicvf_ethdev.c index 08f65b3364..65b14c80cf 100644 --- a/drivers/net/thunderx/nicvf_ethdev.c +++ b/drivers/net/thunderx/nicvf_ethdev.c @@ -143,6 +143,49 @@ nicvf_dev_link_update(struct rte_eth_dev *dev, return nicvf_atomic_write_link_status(dev, &link); } +static int +nicvf_dev_set_mtu(struct rte_eth_dev *dev, uint16_t mtu) +{ + struct nicvf *nic = nicvf_pmd_priv(dev); + uint32_t buffsz, frame_size = mtu + ETHER_HDR_LEN + ETHER_CRC_LEN; + + PMD_INIT_FUNC_TRACE(); + + if (frame_size > NIC_HW_MAX_FRS) + return -EINVAL; + + if (frame_size < NIC_HW_MIN_FRS) + return -EINVAL; + + buffsz = dev->data->min_rx_buf_size - RTE_PKTMBUF_HEADROOM; + + /* + * Refuse mtu that requires the support of scattered packets + * when this feature has not been enabled before. + */ + if (!dev->data->scattered_rx && + (frame_size + 2 * VLAN_TAG_SIZE > buffsz)) + return -EINVAL; + + /* check * >= max_frame */ + if (dev->data->scattered_rx && + (frame_size + 2 * VLAN_TAG_SIZE > buffsz * NIC_HW_MAX_SEGS)) + return -EINVAL; + + if (frame_size > ETHER_MAX_LEN) + dev->data->dev_conf.rxmode.jumbo_frame = 1; + else + dev->data->dev_conf.rxmode.jumbo_frame = 0; + + if (nicvf_mbox_update_hw_max_frs(nic, frame_size)) + return -EINVAL; + + /* Update max frame size */ + dev->data->dev_conf.rxmode.max_rx_pkt_len = (uint32_t)frame_size; + nic->mtu = mtu; + return 0; +} + static int nicvf_dev_get_reg_length(struct rte_eth_dev *dev __rte_unused) { @@ -769,6 +812,7 @@ static const struct eth_dev_ops nicvf_eth_dev_ops = { .dev_configure = nicvf_dev_configure, .link_update = nicvf_dev_link_update, .dev_infos_get = nicvf_dev_info_get, + .mtu_set = nicvf_dev_set_mtu, .reta_update = nicvf_dev_reta_update, .reta_query = nicvf_dev_reta_query, .rss_hash_update = nicvf_dev_rss_hash_update, diff --git a/drivers/net/thunderx/nicvf_ethdev.h b/drivers/net/thunderx/nicvf_ethdev.h index afb875aac1..b1af468755 100644 --- a/drivers/net/thunderx/nicvf_ethdev.h +++ b/drivers/net/thunderx/nicvf_ethdev.h @@ -62,6 +62,8 @@ #define NICVF_MAX_RX_FREE_THRESH 1024 #define NICVF_MAX_TX_FREE_THRESH 1024 +#define VLAN_TAG_SIZE 4 /* 802.3ac tag */ + static inline struct nicvf * nicvf_pmd_priv(struct rte_eth_dev *eth_dev) {