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net: dsa: b53: Properly account for VLAN filtering

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VLAN filtering can be built into the kernel, and also dynamically turned
on/off through the bridge master device. Allow re-configuring the switch
appropriately to account for that by deciding whether VLAN table
(v_table) misses should lead to a drop or forward.

Fixes: a2482d2ce3 ("net: dsa: b53: Plug in VLAN support")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Florian Fainelli 2019-02-15 12:16:50 -08:00 committed by David S. Miller
parent fea8335317
commit dad8d7c645
2 changed files with 57 additions and 5 deletions
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59
drivers/net/dsa/b53/b53_common.c
View File

@ -344,7 +344,8 @@ static void b53_set_forwarding(struct b53_device *dev, int enable)
b53_write8(dev, B53_CTRL_PAGE, B53_SWITCH_CTRL, mgmt);
}
static void b53_enable_vlan(struct b53_device *dev, bool enable)
static void b53_enable_vlan(struct b53_device *dev, bool enable,
bool enable_filtering)
{
u8 mgmt, vc0, vc1, vc4 = 0, vc5;
@ -369,8 +370,13 @@ static void b53_enable_vlan(struct b53_device *dev, bool enable)
vc0 |= VC0_VLAN_EN | VC0_VID_CHK_EN | VC0_VID_HASH_VID;
vc1 |= VC1_RX_MCST_UNTAG_EN | VC1_RX_MCST_FWD_EN;
vc4 &= ~VC4_ING_VID_CHECK_MASK;
vc4 |= VC4_ING_VID_VIO_DROP << VC4_ING_VID_CHECK_S;
vc5 |= VC5_DROP_VTABLE_MISS;
if (enable_filtering) {
vc4 |= VC4_ING_VID_VIO_DROP << VC4_ING_VID_CHECK_S;
vc5 |= VC5_DROP_VTABLE_MISS;
} else {
vc4 |= VC4_ING_VID_VIO_FWD << VC4_ING_VID_CHECK_S;
vc5 &= ~VC5_DROP_VTABLE_MISS;
}
if (is5325(dev))
vc0 &= ~VC0_RESERVED_1;
@ -420,6 +426,9 @@ static void b53_enable_vlan(struct b53_device *dev, bool enable)
}
b53_write8(dev, B53_CTRL_PAGE, B53_SWITCH_MODE, mgmt);
dev->vlan_enabled = enable;
dev->vlan_filtering_enabled = enable_filtering;
}
static int b53_set_jumbo(struct b53_device *dev, bool enable, bool allow_10_100)
@ -656,7 +665,7 @@ int b53_configure_vlan(struct dsa_switch *ds)
b53_do_vlan_op(dev, VTA_CMD_CLEAR);
}
b53_enable_vlan(dev, false);
b53_enable_vlan(dev, false, dev->vlan_filtering_enabled);
b53_for_each_port(dev, i)
b53_write16(dev, B53_VLAN_PAGE,
@ -1265,6 +1274,46 @@ EXPORT_SYMBOL(b53_phylink_mac_link_up);
int b53_vlan_filtering(struct dsa_switch *ds, int port, bool vlan_filtering)
{
struct b53_device *dev = ds->priv;
struct net_device *bridge_dev;
unsigned int i;
u16 pvid, new_pvid;
/* Handle the case were multiple bridges span the same switch device
* and one of them has a different setting than what is being requested
* which would be breaking filtering semantics for any of the other
* bridge devices.
*/
b53_for_each_port(dev, i) {
bridge_dev = dsa_to_port(ds, i)->bridge_dev;
if (bridge_dev &&
bridge_dev != dsa_to_port(ds, port)->bridge_dev &&
br_vlan_enabled(bridge_dev) != vlan_filtering) {
netdev_err(bridge_dev,
"VLAN filtering is global to the switch!\n");
return -EINVAL;
}
}
b53_read16(dev, B53_VLAN_PAGE, B53_VLAN_PORT_DEF_TAG(port), &pvid);
new_pvid = pvid;
if (dev->vlan_filtering_enabled && !vlan_filtering) {
/* Filtering is currently enabled, use the default PVID since
* the bridge does not expect tagging anymore
*/
dev->ports[port].pvid = pvid;
new_pvid = b53_default_pvid(dev);
} else if (!dev->vlan_filtering_enabled && vlan_filtering) {
/* Filtering is currently disabled, restore the previous PVID */
new_pvid = dev->ports[port].pvid;
}
if (pvid != new_pvid)
b53_write16(dev, B53_VLAN_PAGE, B53_VLAN_PORT_DEF_TAG(port),
new_pvid);
b53_enable_vlan(dev, dev->vlan_enabled, vlan_filtering);
return 0;
}
EXPORT_SYMBOL(b53_vlan_filtering);
@ -1280,7 +1329,7 @@ int b53_vlan_prepare(struct dsa_switch *ds, int port,
if (vlan->vid_end > dev->num_vlans)
return -ERANGE;
b53_enable_vlan(dev, true);
b53_enable_vlan(dev, true, dev->vlan_filtering_enabled);
return 0;
}

3
drivers/net/dsa/b53/b53_priv.h
View File

@ -91,6 +91,7 @@ enum {
struct b53_port {
u16 vlan_ctl_mask;
struct ethtool_eee eee;
u16 pvid;
};
struct b53_vlan {
@ -137,6 +138,8 @@ struct b53_device {
unsigned int num_vlans;
struct b53_vlan *vlans;
bool vlan_enabled;
bool vlan_filtering_enabled;
unsigned int num_ports;
struct b53_port *ports;
};