[PATCH net-next 2/3] net: dsa: yt921x: Add HSR offloading support
From: David Yang <mmyangfl@gmail.com>
Date: 2025-10-24 03:33:12
Also in:
lkml
Subsystem:
motorcomm yt921x ethernet switch driver, networking drivers, networking [dsa], networking [general], the rest · Maintainers:
David Yang, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Vladimir Oltean, Linus Torvalds
Add offloading for packet duplication supported by the YT921x switches. Signed-off-by: David Yang <mmyangfl@gmail.com> --- drivers/net/dsa/yt921x.c | 24 ++++++++++++++++++++++++ net/dsa/tag_yt921x.c | 4 ++++ 2 files changed, 28 insertions(+)
diff --git a/drivers/net/dsa/yt921x.c b/drivers/net/dsa/yt921x.c
index 485fec3ac74f..885a63f2b978 100644
--- a/drivers/net/dsa/yt921x.c
+++ b/drivers/net/dsa/yt921x.c@@ -1038,6 +1038,27 @@ static int yt921x_dsa_port_max_mtu(struct dsa_switch *ds, int port) return YT921X_FRAME_SIZE_MAX - ETH_HLEN - ETH_FCS_LEN - YT921X_TAG_LEN; } +static int +yt921x_dsa_port_hsr_leave(struct dsa_switch *ds, int port, + struct net_device *hsr) +{ + return 0; +} + +static int +yt921x_dsa_port_hsr_join(struct dsa_switch *ds, int port, + struct net_device *hsr, struct netlink_ext_ack *extack) +{ + struct dsa_port *dp = dsa_to_port(ds, port); + struct net_device *user = dp->user; + + /* Nothing special here; we natively support tx packet duplication */ + + user->features |= NETIF_F_HW_HSR_DUP; + + return 0; +} + static int yt921x_mirror_del(struct yt921x_priv *priv, int port, bool ingress) {
@@ -2879,6 +2900,9 @@ static const struct dsa_switch_ops yt921x_dsa_switch_ops = { /* mtu */ .port_change_mtu = yt921x_dsa_port_change_mtu, .port_max_mtu = yt921x_dsa_port_max_mtu, + /* hsr */ + .port_hsr_leave = yt921x_dsa_port_hsr_leave, + .port_hsr_join = yt921x_dsa_port_hsr_join, /* mirror */ .port_mirror_del = yt921x_dsa_port_mirror_del, .port_mirror_add = yt921x_dsa_port_mirror_add,
diff --git a/net/dsa/tag_yt921x.c b/net/dsa/tag_yt921x.c
index 995da44f0a2a..0ad83924fda1 100644
--- a/net/dsa/tag_yt921x.c
+++ b/net/dsa/tag_yt921x.c@@ -46,6 +46,7 @@ yt921x_tag_xmit(struct sk_buff *skb, struct net_device *netdev) { struct dsa_port *dp = dsa_user_to_port(netdev); unsigned int port = dp->index; + struct dsa_port *partner; __be16 *tag; u16 tx;
@@ -59,6 +60,9 @@ yt921x_tag_xmit(struct sk_buff *skb, struct net_device *netdev) tag[1] = 0; tag[2] = 0; tx = YT921X_TAG_PORT_EN | YT921X_TAG_TX_PORTn(port); + if (dp->hsr_dev) + dsa_hsr_foreach_port(partner, dp->ds, dp->hsr_dev) + tx |= YT921X_TAG_TX_PORTn(partner->index); tag[3] = htons(tx); return skb;
--
2.51.0