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[net-next,5/9] net: dsa: bcm_sf2: Disable learning for ASP port

Message ID 20200330204032.26313-6-f.fainelli@gmail.com
State Superseded
Delegated to: David Miller
Headers show
Series net: dsa: b53 & bcm_sf2 updates for 7278 | expand

Commit Message

Florian Fainelli March 30, 2020, 8:40 p.m. UTC 
We don't want to enable learning for the ASP port since it just received
directed traffic, this allows us to bypass ARL-driven forwarding rules
which could conflict with Broadcom tags and/or CFP forwarding.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
---
 drivers/net/dsa/bcm_sf2.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)
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Patch

diff --git a/drivers/net/dsa/bcm_sf2.c b/drivers/net/dsa/bcm_sf2.c
index 368ead87e07a..affa5c6e135c 100644
--- a/drivers/net/dsa/bcm_sf2.c
+++ b/drivers/net/dsa/bcm_sf2.c
@@ -178,9 +178,17 @@  static int bcm_sf2_port_setup(struct dsa_switch *ds, int port,
 	core_writel(priv, reg, CORE_DIS_LEARN);
 
 	/* Enable Broadcom tags for that port if requested */
-	if (priv->brcm_tag_mask & BIT(port))
+	if (priv->brcm_tag_mask & BIT(port)) {
 		b53_brcm_hdr_setup(ds, port);
 
+		/* Disable learning on ASP port */
+		if (port == 7) {
+			reg = core_readl(priv, CORE_DIS_LEARN);
+			reg |= BIT(port);
+			core_writel(priv, reg, CORE_DIS_LEARN);
+		}
+	}
+
 	/* Configure Traffic Class to QoS mapping, allow each priority to map
 	 * to a different queue number
 	 */