[RFC PATCH net-next v2 3/6] net: dsa: qca8k: flood unknown frames to all CPU ports
From: Brandon Mahdavi <hidden>
Date: 2026-08-02 03:47:23
Also in:
lkml
Subsystem:
networking drivers, networking [dsa], the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Andrew Lunn, Vladimir Oltean, Linus Torvalds
From: Christian Marangi <ansuelsmth@gmail.com> A multi-conduit setup requires unknown traffic to be eligible for delivery through every CPU port. Program all DSA CPU ports into the global IGMP, broadcast, multicast and unknown-unicast destination masks. Per-port lookup membership still controls which CPU port can receive a frame from each user port, preventing duplicate delivery. Link: https://github.com/openwrt/openwrt/commit/500dbaefd2a6a1c9c0d81e275a28c6a8e26519e4 Signed-off-by: Christian Marangi <ansuelsmth@gmail.com> Signed-off-by: Brandon Mahdavi <redacted> --- drivers/net/dsa/qca/qca8k-8xxx.c | 13 +++++-------- 1 file changed, 5 insertions(+), 8 deletions(-)
diff --git a/drivers/net/dsa/qca/qca8k-8xxx.c b/drivers/net/dsa/qca/qca8k-8xxx.c
index 9dce23aaed76..4adc5081d05d 100644
--- a/drivers/net/dsa/qca/qca8k-8xxx.c
+++ b/drivers/net/dsa/qca/qca8k-8xxx.c@@ -1922,15 +1922,12 @@ qca8k_setup(struct dsa_switch *ds) } } - /* Forward all unknown frames to CPU port for Linux processing - * Notice that in multi-cpu config only one port should be set - * for igmp, unknown, multicast and broadcast packet - */ + /* Forward all unknown frames to CPU port for Linux processing */ ret = qca8k_write(priv, QCA8K_REG_GLOBAL_FW_CTRL1, - FIELD_PREP(QCA8K_GLOBAL_FW_CTRL1_IGMP_DP_MASK, BIT(cpu_port)) | - FIELD_PREP(QCA8K_GLOBAL_FW_CTRL1_BC_DP_MASK, BIT(cpu_port)) | - FIELD_PREP(QCA8K_GLOBAL_FW_CTRL1_MC_DP_MASK, BIT(cpu_port)) | - FIELD_PREP(QCA8K_GLOBAL_FW_CTRL1_UC_DP_MASK, BIT(cpu_port))); + FIELD_PREP(QCA8K_GLOBAL_FW_CTRL1_IGMP_DP_MASK, dsa_cpu_ports(ds)) | + FIELD_PREP(QCA8K_GLOBAL_FW_CTRL1_BC_DP_MASK, dsa_cpu_ports(ds)) | + FIELD_PREP(QCA8K_GLOBAL_FW_CTRL1_MC_DP_MASK, dsa_cpu_ports(ds)) | + FIELD_PREP(QCA8K_GLOBAL_FW_CTRL1_UC_DP_MASK, dsa_cpu_ports(ds))); if (ret) return ret;
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2.43.0