[PATCH AUTOSEL 5.4 128/187] net: dsa: b53: Fix egress flooding settings

Sasha Levin
2019-12-27T17:43:51Z

From: Florian Fainelli <f.fainelli@gmail.com>

[ Upstream commit 63cc54a6f0736a432b04308a74677ab0ba8a58ee ]

There were several issues with 53568438e381 ("net: dsa: b53: Add support for port_egress_floods callback") that resulted in breaking connectivity for standalone ports:

- both user and CPU ports must allow unicast and multicast forwarding by
default otherwise this just flat out breaks connectivity for
standalone DSA ports
- IP multicast is treated similarly as multicast, but has separate
control registers
- the UC, MC and IPMC lookup failure register offsets were wrong, and
instead used bit values that are meaningful for the
B53_IP_MULTICAST_CTRL register

Fixes: 53568438e381 ("net: dsa: b53: Add support for port_egress_floods callback")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Vivien Didelot <vivien.didelot@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/dsa/b53/b53_common.c | 21 ++++++++++++++++-----
1 file changed, 16 insertions(+), 5 deletions(-)

diff --git a/drivers/net/dsa/b53/b53_common.c b/drivers/net/dsa/b53/b53_common.c
index cc3536315eff..a7132c1593c3 100644
--- a/drivers/net/dsa/b53/b53_common.c
+++ b/drivers/net/dsa/b53/b53_common.c
@@ -347,7 +347,7 @@ static void b53_set_forwarding(struct b53_device *dev, int enable)
* frames should be flooded or not.
*/
b53_read8(dev, B53_CTRL_PAGE, B53_IP_MULTICAST_CTRL, &mgmt);
- mgmt |= B53_UC_FWD_EN | B53_MC_FWD_EN;
+ mgmt |= B53_UC_FWD_EN | B53_MC_FWD_EN | B53_IPMC_FWD_EN;
b53_write8(dev, B53_CTRL_PAGE, B53_IP_MULTICAST_CTRL, mgmt);
}

@@ -526,6 +526,8 @@ int b53_enable_port(struct dsa_switch *ds, int port, struct phy_device *phy)

cpu_port = ds->ports[port].cpu_dp->index;

+ b53_br_egress_floods(ds, port, true, true);
+
if (dev->ops->irq_enable)
ret = dev->ops->irq_enable(dev, port);
if (ret)
@@ -641,6 +643,8 @@ static void b53_enable_cpu_port(struct b53_device *dev, int port)
b53_write8(dev, B53_CTRL_PAGE, B53_PORT_CTRL(port), port_ctrl);

b53_brcm_hdr_setup(dev->ds, port);
+
+ b53_br_egress_floods(dev->ds, port, true, true);
}

static void b53_enable_mib(struct b53_device *dev)
@@ -1766,19 +1770,26 @@ int b53_br_egress_floods(struct dsa_switch *ds, int port,
struct b53_device *dev = ds->priv;
u16 uc, mc;

- b53_read16(dev, B53_CTRL_PAGE, B53_UC_FWD_EN, &uc);
+ b53_read16(dev, B53_CTRL_PAGE, B53_UC_FLOOD_MASK, &uc);
if (unicast)
uc |= BIT(port);
else
uc &= ~BIT(port);
- b53_write16(dev, B53_CTRL_PAGE, B53_UC_FWD_EN, uc);
+ b53_write16(dev, B53_CTRL_PAGE, B53_UC_FLOOD_MASK, uc);
+
+ b53_read16(dev, B53_CTRL_PAGE, B53_MC_FLOOD_MASK, &mc);
+ if (multicast)
+ mc |= BIT(port);
+ else
+ mc &= ~BIT(port);
+ b53_write16(dev, B53_CTRL_PAGE, B53_MC_FLOOD_MASK, mc);

- b53_read16(dev, B53_CTRL_PAGE, B53_MC_FWD_EN, &mc);
+ b53_read16(dev, B53_CTRL_PAGE, B53_IPMC_FLOOD_MASK, &mc);
if (multicast)
mc |= BIT(port);
else
mc &= ~BIT(port);
- b53_write16(dev, B53_CTRL_PAGE, B53_MC_FWD_EN, mc);
+ b53_write16(dev, B53_CTRL_PAGE, B53_IPMC_FLOOD_MASK, mc);

return 0;

--
2.20.1