From d81d78eb86d50732ba98a8b255d19c2f6292521c Mon Sep 17 00:00:00 2001 From: "Min Hu (Connor)" Date: Thu, 1 Apr 2021 21:38:03 +0800 Subject: [PATCH] net/hns3: fix MTU config complexity This patch fixed cyclomatic complexity about MTU in device configure process. Fixes: 1f5ca0b460cd ("net/hns3: support some device operations") Cc: stable@dpdk.org Signed-off-by: Min Hu (Connor) --- drivers/net/hns3/hns3_ethdev.c | 62 +++++++++++++++++++++------------- 1 file changed, 38 insertions(+), 24 deletions(-) diff --git a/drivers/net/hns3/hns3_ethdev.c b/drivers/net/hns3/hns3_ethdev.c index 9c718082b0..b07996928b 100644 --- a/drivers/net/hns3/hns3_ethdev.c +++ b/drivers/net/hns3/hns3_ethdev.c @@ -2372,6 +2372,41 @@ hns3_init_ring_with_vector(struct hns3_hw *hw) return 0; } +static int +hns3_refresh_mtu(struct rte_eth_dev *dev, struct rte_eth_conf *conf) +{ + struct hns3_adapter *hns = dev->data->dev_private; + struct hns3_hw *hw = &hns->hw; + uint32_t max_rx_pkt_len; + uint16_t mtu; + int ret; + + if (!(conf->rxmode.offloads & DEV_RX_OFFLOAD_JUMBO_FRAME)) + return 0; + + /* + * If jumbo frames are enabled, MTU needs to be refreshed + * according to the maximum RX packet length. + */ + max_rx_pkt_len = conf->rxmode.max_rx_pkt_len; + if (max_rx_pkt_len > HNS3_MAX_FRAME_LEN || + max_rx_pkt_len <= HNS3_DEFAULT_FRAME_LEN) { + hns3_err(hw, "maximum Rx packet length must be greater than %u " + "and no more than %u when jumbo frame enabled.", + (uint16_t)HNS3_DEFAULT_FRAME_LEN, + (uint16_t)HNS3_MAX_FRAME_LEN); + return -EINVAL; + } + + mtu = (uint16_t)HNS3_PKTLEN_TO_MTU(max_rx_pkt_len); + ret = hns3_dev_mtu_set(dev, mtu); + if (ret) + return ret; + dev->data->mtu = mtu; + + return 0; +} + static int hns3_dev_configure(struct rte_eth_dev *dev) { @@ -2382,8 +2417,6 @@ hns3_dev_configure(struct rte_eth_dev *dev) uint16_t nb_rx_q = dev->data->nb_rx_queues; uint16_t nb_tx_q = dev->data->nb_tx_queues; struct rte_eth_rss_conf rss_conf; - uint32_t max_rx_pkt_len; - uint16_t mtu; bool gro_en; int ret; @@ -2431,28 +2464,9 @@ hns3_dev_configure(struct rte_eth_dev *dev) goto cfg_err; } - /* - * If jumbo frames are enabled, MTU needs to be refreshed - * according to the maximum RX packet length. - */ - if (conf->rxmode.offloads & DEV_RX_OFFLOAD_JUMBO_FRAME) { - max_rx_pkt_len = conf->rxmode.max_rx_pkt_len; - if (max_rx_pkt_len > HNS3_MAX_FRAME_LEN || - max_rx_pkt_len <= HNS3_DEFAULT_FRAME_LEN) { - hns3_err(hw, "maximum Rx packet length must be greater " - "than %u and less than %u when jumbo frame enabled.", - (uint16_t)HNS3_DEFAULT_FRAME_LEN, - (uint16_t)HNS3_MAX_FRAME_LEN); - ret = -EINVAL; - goto cfg_err; - } - - mtu = (uint16_t)HNS3_PKTLEN_TO_MTU(max_rx_pkt_len); - ret = hns3_dev_mtu_set(dev, mtu); - if (ret) - goto cfg_err; - dev->data->mtu = mtu; - } + ret = hns3_refresh_mtu(dev, conf); + if (ret) + goto cfg_err; ret = hns3_dev_configure_vlan(dev); if (ret) -- 2.20.1