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| author | DENG Qingfang <dqfext@gmail.com> | 2020-12-08 15:00:28 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-12-08 16:18:26 -0800 |
| commit | ea6d5c924e391872d402acac38461a5f8261e57f (patch) | |
| tree | cdb6a7616c7c210c464268b32e9429368335bbea /drivers/net/dsa/mt7530.c | |
| parent | 25fd263473c72597f4a477490cd7840fded63f05 (diff) | |
| download | linux-ea6d5c924e391872d402acac38461a5f8261e57f.tar.bz2 | |
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>
Diffstat (limited to 'drivers/net/dsa/mt7530.c')
| -rw-r--r-- | drivers/net/dsa/mt7530.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c index 6408402a44f5..99bf8fed6536 100644 --- a/drivers/net/dsa/mt7530.c +++ b/drivers/net/dsa/mt7530.c @@ -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, |