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net: dsa: mt7530: support setting ageing time 

MT7530 has a global address age control register, so use it to set
ageing time.

The applied timer is (AGE_CNT + 1) * (AGE_UNIT + 1) seconds

Signed-off-by: DENG Qingfang <dqfext@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
DENG Qingfang 2020-12-08 15:00:28 +08:00 committed by David S. Miller
parent 25fd263473
commit ea6d5c924e
2 changed files with 54 additions and 0 deletions
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41
drivers/net/dsa/mt7530.c
View File

@ -870,6 +870,46 @@ mt7530_get_sset_count(struct dsa_switch *ds, int port, int sset)
return ARRAY_SIZE(mt7530_mib);
}
static int
mt7530_set_ageing_time(struct dsa_switch *ds, unsigned int msecs)
{
struct mt7530_priv *priv = ds->priv;
unsigned int secs = msecs / 1000;
unsigned int tmp_age_count;
unsigned int error = -1;
unsigned int age_count;
unsigned int age_unit;
/* Applied timer is (AGE_CNT + 1) * (AGE_UNIT + 1) seconds */
if (secs < 1 || secs > (AGE_CNT_MAX + 1) * (AGE_UNIT_MAX + 1))
return -ERANGE;
/* iterate through all possible age_count to find the closest pair */
for (tmp_age_count = 0; tmp_age_count <= AGE_CNT_MAX; ++tmp_age_count) {
unsigned int tmp_age_unit = secs / (tmp_age_count + 1) - 1;
if (tmp_age_unit <= AGE_UNIT_MAX) {
unsigned int tmp_error = secs -
(tmp_age_count + 1) * (tmp_age_unit + 1);
/* found a closer pair */
if (error > tmp_error) {
error = tmp_error;
age_count = tmp_age_count;
age_unit = tmp_age_unit;
}
/* found the exact match, so break the loop */
if (!error)
break;
}
}
mt7530_write(priv, MT7530_AAC, AGE_CNT(age_count) | AGE_UNIT(age_unit));
return 0;
}
static void mt7530_setup_port5(struct dsa_switch *ds, phy_interface_t interface)
{
struct mt7530_priv *priv = ds->priv;
@ -2564,6 +2604,7 @@ static const struct dsa_switch_ops mt7530_switch_ops = {
.phy_write = mt753x_phy_write,
.get_ethtool_stats = mt7530_get_ethtool_stats,
.get_sset_count = mt7530_get_sset_count,
.set_ageing_time = mt7530_set_ageing_time,
.port_enable = mt7530_port_enable,
.port_disable = mt7530_port_disable,
.port_change_mtu = mt7530_port_change_mtu,

13
drivers/net/dsa/mt7530.h
View File

@ -161,6 +161,19 @@ enum mt7530_vlan_egress_attr {
MT7530_VLAN_EGRESS_STACK = 3,
};
/* Register for address age control */
#define MT7530_AAC 0xa0
/* Disable ageing */
#define AGE_DIS BIT(20)
/* Age count */
#define AGE_CNT_MASK GENMASK(19, 12)
#define AGE_CNT_MAX 0xff
#define AGE_CNT(x) (AGE_CNT_MASK & ((x) << 12))
/* Age unit */
#define AGE_UNIT_MASK GENMASK(11, 0)
#define AGE_UNIT_MAX 0xfff
#define AGE_UNIT(x) (AGE_UNIT_MASK & (x))
/* Register for port STP state control */
#define MT7530_SSP_P(x) (0x2000 + ((x) * 0x100))
#define FID_PST(x) ((x) & 0x3)