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net: dsa: b53: Add support for port mirroring 

Add support for configuring port mirroring through the cls_matchall
classifier. We do a full ingress or egress capture towards the capture
port. Future improvements could include leveraging the divider to allow
less frames to be captured, as well as matching specific MAC DA/SA.

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 2017-01-30 12:41:42 -08:00 committed by David S. Miller
parent 151da0171e
commit ed3af5fd08
2 changed files with 71 additions and 0 deletions
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67
drivers/net/dsa/b53/b53_common.c
View File

@ -1450,6 +1450,71 @@ static enum dsa_tag_protocol b53_get_tag_protocol(struct dsa_switch *ds)
return DSA_TAG_PROTO_NONE;
}
int b53_mirror_add(struct dsa_switch *ds, int port,
struct dsa_mall_mirror_tc_entry *mirror, bool ingress)
{
struct b53_device *dev = ds->priv;
u16 reg, loc;
if (ingress)
loc = B53_IG_MIR_CTL;
else
loc = B53_EG_MIR_CTL;
b53_read16(dev, B53_MGMT_PAGE, loc, &reg);
reg &= ~MIRROR_MASK;
reg |= BIT(port);
b53_write16(dev, B53_MGMT_PAGE, loc, reg);
b53_read16(dev, B53_MGMT_PAGE, B53_MIR_CAP_CTL, &reg);
reg &= ~CAP_PORT_MASK;
reg |= mirror->to_local_port;
reg |= MIRROR_EN;
b53_write16(dev, B53_MGMT_PAGE, B53_MIR_CAP_CTL, reg);
return 0;
}
EXPORT_SYMBOL(b53_mirror_add);
void b53_mirror_del(struct dsa_switch *ds, int port,
struct dsa_mall_mirror_tc_entry *mirror)
{
struct b53_device *dev = ds->priv;
bool loc_disable = false, other_loc_disable = false;
u16 reg, loc;
if (mirror->ingress)
loc = B53_IG_MIR_CTL;
else
loc = B53_EG_MIR_CTL;
/* Update the desired ingress/egress register */
b53_read16(dev, B53_MGMT_PAGE, loc, &reg);
reg &= ~BIT(port);
if (!(reg & MIRROR_MASK))
loc_disable = true;
b53_write16(dev, B53_MGMT_PAGE, loc, reg);
/* Now look at the other one to know if we can disable mirroring
* entirely
*/
if (mirror->ingress)
b53_read16(dev, B53_MGMT_PAGE, B53_EG_MIR_CTL, &reg);
else
b53_read16(dev, B53_MGMT_PAGE, B53_IG_MIR_CTL, &reg);
if (!(reg & MIRROR_MASK))
other_loc_disable = true;
b53_read16(dev, B53_MGMT_PAGE, B53_MIR_CAP_CTL, &reg);
/* Both no longer have ports, let's disable mirroring */
if (loc_disable && other_loc_disable) {
reg &= ~MIRROR_EN;
reg &= ~mirror->to_local_port;
}
b53_write16(dev, B53_MGMT_PAGE, B53_MIR_CAP_CTL, reg);
}
EXPORT_SYMBOL(b53_mirror_del);
static const struct dsa_switch_ops b53_switch_ops = {
.get_tag_protocol = b53_get_tag_protocol,
.setup = b53_setup,
@ -1474,6 +1539,8 @@ static const struct dsa_switch_ops b53_switch_ops = {
.port_fdb_dump = b53_fdb_dump,
.port_fdb_add = b53_fdb_add,
.port_fdb_del = b53_fdb_del,
.port_mirror_add = b53_mirror_add,
.port_mirror_del = b53_mirror_del,
};
struct b53_chip_data {

4
drivers/net/dsa/b53/b53_priv.h
View File

@ -407,5 +407,9 @@ int b53_fdb_del(struct dsa_switch *ds, int port,
int b53_fdb_dump(struct dsa_switch *ds, int port,
struct switchdev_obj_port_fdb *fdb,
int (*cb)(struct switchdev_obj *obj));
int b53_mirror_add(struct dsa_switch *ds, int port,
struct dsa_mall_mirror_tc_entry *mirror, bool ingress);
void b53_mirror_del(struct dsa_switch *ds, int port,
struct dsa_mall_mirror_tc_entry *mirror);
#endif