net: dsa: mv88e6xxx: use ports list to map port VLAN

Instead of digging into the other dsa_switch structures of the fabric
and relying too much on the dsa_to_port helper, use the new list of
switch fabric ports to define the mask of the local ports allowed to
receive frames from another port of the fabric.

Signed-off-by: Vivien Didelot <vivien.didelot@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>

diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index 510ccdc2d03ccbdabff237bfb6ea29795658f941..af89431420532735bdf36f44e6f344abcf769211 100644 (file)
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -1057,35 +1057,43 @@ static int mv88e6xxx_set_mac_eee(struct dsa_switch *ds, int port,
        return 0;
 }
 
+/* Mask of the local ports allowed to receive frames from a given fabric port */
 static u16 mv88e6xxx_port_vlan(struct mv88e6xxx_chip *chip, int dev, int port)
 {
-       struct dsa_switch *ds = NULL;
+       struct dsa_switch *ds = chip->ds;
+       struct dsa_switch_tree *dst = ds->dst;
        struct net_device *br;
+       struct dsa_port *dp;
+       bool found = false;
        u16 pvlan;
-       int i;
 
-       if (dev < DSA_MAX_SWITCHES)
-               ds = chip->ds->dst->ds[dev];
+       list_for_each_entry(dp, &dst->ports, list) {
+               if (dp->ds->index == dev && dp->index == port) {
+                       found = true;
+                       break;
+               }
+       }
 
        /* Prevent frames from unknown switch or port */
-       if (!ds || port >= ds->num_ports)
+       if (!found)
                return 0;
 
        /* Frames from DSA links and CPU ports can egress any local port */
-       if (dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port))
+       if (dp->type == DSA_PORT_TYPE_CPU || dp->type == DSA_PORT_TYPE_DSA)
                return mv88e6xxx_port_mask(chip);
 
-       br = dsa_to_port(ds, port)->bridge_dev;
+       br = dp->bridge_dev;
        pvlan = 0;
 
        /* Frames from user ports can egress any local DSA links and CPU ports,
         * as well as any local member of their bridge group.
         */
-       for (i = 0; i < mv88e6xxx_num_ports(chip); ++i)
-               if (dsa_is_cpu_port(chip->ds, i) ||
-                   dsa_is_dsa_port(chip->ds, i) ||
-                   (br && dsa_to_port(chip->ds, i)->bridge_dev == br))
-                       pvlan |= BIT(i);
+       list_for_each_entry(dp, &dst->ports, list)
+               if (dp->ds == ds &&
+                   (dp->type == DSA_PORT_TYPE_CPU ||
+                    dp->type == DSA_PORT_TYPE_DSA ||
+                    (br && dp->bridge_dev == br)))
+                       pvlan |= BIT(dp->index);
 
        return pvlan;
 }