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authorLukasz Majewski <lukma@denx.de>2023-09-22 15:31:06 +0200
committerPaolo Abeni <pabeni@redhat.com>2023-10-03 13:51:02 +0200
commit5e5db71a92c537ff37149b58bba6a8b2588a46f0 (patch)
tree34e82be3a7470fc378a512187ea8910be822975f
parent6715042cd112e1db971583e2eed89b90d6f9b139 (diff)
net: dsa: tag_ksz: Extend ksz9477_xmit() for HSR frame duplication
The KSZ9477 has support for HSR (High-Availability Seamless Redundancy). One of its offloading (i.e. performed in the switch IC hardware) features is to duplicate received frame to both HSR aware switch ports. To achieve this goal - the tail TAG needs to be modified. To be more specific, both ports must be marked as destination (egress) ones. The NETIF_F_HW_HSR_DUP flag indicates that the device supports HSR and assures (in HSR core code) that frame is sent only once from HOST to switch with tail tag indicating both ports. Signed-off-by: Lukasz Majewski <lukma@denx.de> Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com> Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com>
-rw-r--r--net/dsa/tag_ksz.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/net/dsa/tag_ksz.c b/net/dsa/tag_ksz.c
index ea100bd25939..3632e47dea9e 100644
--- a/net/dsa/tag_ksz.c
+++ b/net/dsa/tag_ksz.c
@@ -293,6 +293,14 @@ static struct sk_buff *ksz9477_xmit(struct sk_buff *skb,
if (is_link_local_ether_addr(hdr->h_dest))
val |= KSZ9477_TAIL_TAG_OVERRIDE;
+ if (dev->features & NETIF_F_HW_HSR_DUP) {
+ struct net_device *hsr_dev = dp->hsr_dev;
+ struct dsa_port *other_dp;
+
+ dsa_hsr_foreach_port(other_dp, dp->ds, hsr_dev)
+ val |= BIT(other_dp->index);
+ }
+
*tag = cpu_to_be16(val);
return ksz_defer_xmit(dp, skb);