dsa/mv88e6131: fix unknown multicast/broadcast forwarding on mv88e6085

The 88e6085 has a few differences from the other devices in the port
control registers, causing unknown multicast/broadcast packets to get
dropped when using the standard port setup.

At the same time update kconfig to clarify that the mv88e6085 is now
supported.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Acked-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/dsa/Kconfig b/net/dsa/Kconfig
index 87bb5f4..c53ded2 100644 (file)
--- a/net/dsa/Kconfig
+++ b/net/dsa/Kconfig
@@ -41,12 +41,12 @@ config NET_DSA_MV88E6XXX_NEED_PPU
        default n
 
 config NET_DSA_MV88E6131
-       bool "Marvell 88E6095/6095F/6131 ethernet switch chip support"
+       bool "Marvell 88E6085/6095/6095F/6131 ethernet switch chip support"
        select NET_DSA_MV88E6XXX
        select NET_DSA_MV88E6XXX_NEED_PPU
        select NET_DSA_TAG_DSA
        ---help---
-         This enables support for the Marvell 88E6095/6095F/6131
+         This enables support for the Marvell 88E6085/6095/6095F/6131
          ethernet switch chips.
 
 config NET_DSA_MV88E6123_61_65

diff --git a/net/dsa/mv88e6131.c b/net/dsa/mv88e6131.c
index 3da4188..45f7411 100644 (file)
--- a/net/dsa/mv88e6131.c
+++ b/net/dsa/mv88e6131.c
@@ -207,8 +207,15 @@ static int mv88e6131_setup_port(struct dsa_switch *ds, int p)
         * mode, but do not enable forwarding of unknown unicasts.
         */
        val = 0x0433;
-       if (p == dsa_upstream_port(ds))
+       if (p == dsa_upstream_port(ds)) {
                val |= 0x0104;
+               /*
+                * On 6085, unknown multicast forward is controlled
+                * here rather than in Port Control 2 register.
+                */
+               if (ps->id == ID_6085)
+                       val |= 0x0008;
+       }
        if (ds->dsa_port_mask & (1 << p))
                val |= 0x0100;
        REG_WRITE(addr, 0x04, val);
@@ -251,10 +258,19 @@ static int mv88e6131_setup_port(struct dsa_switch *ds, int p)
         * If this is the upstream port for this switch, enable
         * forwarding of unknown multicast addresses.
         */
-       val = 0x0080 | dsa_upstream_port(ds);
-       if (p == dsa_upstream_port(ds))
-               val |= 0x0040;
-       REG_WRITE(addr, 0x08, val);
+       if (ps->id == ID_6085)
+               /*
+                * on 6085, bits 3:0 are reserved, bit 6 control ARP
+                * mirroring, and multicast forward is handled in
+                * Port Control register.
+                */
+               REG_WRITE(addr, 0x08, 0x0080);
+       else {
+               val = 0x0080 | dsa_upstream_port(ds);
+               if (p == dsa_upstream_port(ds))
+                       val |= 0x0040;
+               REG_WRITE(addr, 0x08, val);
+       }
 
        /*
         * Rate Control: disable ingress rate limiting.