[PATCH net-next 2/5] net: hns3: support ndo_select_queue()
From: Guangbin Huang <hidden>
Date: 2022-09-05 08:18:52
Also in:
lkml
Subsystem:
hisilicon network subsystem 3 driver (hns3), hisilicon network subsystem driver, networking drivers, the rest · Maintainers:
Jian Shen, Jijie Shao, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
To support tx packets to select queue according to its dscp field after setting dscp and tc map relationship, this patch implements ndo_select_queue() to set skb->priority according to the user's setting dscp and priority map relationship. Signed-off-by: Guangbin Huang <redacted> --- .../net/ethernet/hisilicon/hns3/hns3_enet.c | 46 +++++++++++++++++++ 1 file changed, 46 insertions(+)
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
index 481a300819ad..82f83e3f8162 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c@@ -2963,6 +2963,51 @@ static int hns3_nic_set_vf_mac(struct net_device *netdev, int vf_id, u8 *mac) return h->ae_algo->ops->set_vf_mac(h, vf_id, mac); } +#define HNS3_INVALID_DSCP 0xff +#define HNS3_DSCP_SHIFT 2 + +static u8 hns3_get_skb_dscp(struct sk_buff *skb) +{ + __be16 protocol = skb->protocol; + u8 dscp = HNS3_INVALID_DSCP; + + if (protocol == htons(ETH_P_8021Q)) + protocol = vlan_get_protocol(skb); + + if (protocol == htons(ETH_P_IP)) + dscp = ipv4_get_dsfield(ip_hdr(skb)) >> HNS3_DSCP_SHIFT; + else if (protocol == htons(ETH_P_IPV6)) + dscp = ipv6_get_dsfield(ipv6_hdr(skb)) >> HNS3_DSCP_SHIFT; + + return dscp; +} + +static u16 hns3_nic_select_queue(struct net_device *netdev, + struct sk_buff *skb, + struct net_device *sb_dev) +{ + struct hnae3_handle *h = hns3_get_handle(netdev); + u8 dscp, priority; + int ret; + + if (h->kinfo.tc_map_mode != HNAE3_TC_MAP_MODE_DSCP || + !h->ae_algo->ops->get_dscp_prio) + goto out; + + dscp = hns3_get_skb_dscp(skb); + if (unlikely(dscp == HNS3_INVALID_DSCP)) + goto out; + + ret = h->ae_algo->ops->get_dscp_prio(h, dscp, NULL, &priority); + if (ret) + goto out; + + skb->priority = priority; + +out: + return netdev_pick_tx(netdev, skb, sb_dev); +} + static const struct net_device_ops hns3_nic_netdev_ops = { .ndo_open = hns3_nic_net_open, .ndo_stop = hns3_nic_net_stop,
@@ -2988,6 +3033,7 @@ static const struct net_device_ops hns3_nic_netdev_ops = { .ndo_set_vf_link_state = hns3_nic_set_vf_link_state, .ndo_set_vf_rate = hns3_nic_set_vf_rate, .ndo_set_vf_mac = hns3_nic_set_vf_mac, + .ndo_select_queue = hns3_nic_select_queue, }; bool hns3_is_phys_func(struct pci_dev *pdev)
--
2.33.0