netdev - [PATCH] include: net: add dsa_cpu

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Message-Id: <20210406034903.14329-1-ansuelsmth@gmail.com>
Date:   Tue,  6 Apr 2021 05:49:03 +0200
From:   Ansuel Smith <ansuelsmth@...il.com>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     Ansuel Smith <ansuelsmth@...il.com>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] include: net: add dsa_cpu_ports function

In preparation for the future when dsa will support multi cpu port,
dsa_cpu_ports can be useful for switch that has multiple cpu port to
retrieve the cpu mask for ACL and bridge table.

Signed-off-by: Ansuel Smith <ansuelsmth@...il.com>
---
 include/net/dsa.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/include/net/dsa.h b/include/net/dsa.h
index 83a933e563fe..d71b1acd9c3e 100644
--- a/include/net/dsa.h
+++ b/include/net/dsa.h
@@ -446,6 +446,18 @@ static inline u32 dsa_user_ports(struct dsa_switch *ds)
 	return mask;
 }
 
+static inline u32 dsa_cpu_ports(struct dsa_switch *ds)
+{
+	u32 mask = 0;
+	int p;
+
+	for (p = 0; p < ds->num_ports; p++)
+		if (dsa_is_cpu_port(ds, p))
+			mask |= BIT(p);
+
+	return mask;
+}
+
 /* Return the local port used to reach an arbitrary switch device */
 static inline unsigned int dsa_routing_port(struct dsa_switch *ds, int device)
 {
-- 
2.30.2