1 From ea6d5c924e391872d402acac38461a5f8261e57f Mon Sep 17 00:00:00 2001
2 From: DENG Qingfang <dqfext@gmail.com>
3 Date: Tue, 8 Dec 2020 15:00:28 +0800
4 Subject: [PATCH] net: dsa: mt7530: support setting ageing time
6 MT7530 has a global address age control register, so use it to set
9 The applied timer is (AGE_CNT + 1) * (AGE_UNIT + 1) seconds
11 Signed-off-by: DENG Qingfang <dqfext@gmail.com>
12 Reviewed-by: Andrew Lunn <andrew@lunn.ch>
13 Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
14 Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
15 Signed-off-by: David S. Miller <davem@davemloft.net>
17 drivers/net/dsa/mt7530.c | 41 ++++++++++++++++++++++++++++++++++++++++
18 drivers/net/dsa/mt7530.h | 13 +++++++++++++
19 2 files changed, 54 insertions(+)
21 --- a/drivers/net/dsa/mt7530.c
22 +++ b/drivers/net/dsa/mt7530.c
23 @@ -870,6 +870,46 @@ mt7530_get_sset_count(struct dsa_switch
24 return ARRAY_SIZE(mt7530_mib);
28 +mt7530_set_ageing_time(struct dsa_switch *ds, unsigned int msecs)
30 + struct mt7530_priv *priv = ds->priv;
31 + unsigned int secs = msecs / 1000;
32 + unsigned int tmp_age_count;
33 + unsigned int error = -1;
34 + unsigned int age_count;
35 + unsigned int age_unit;
37 + /* Applied timer is (AGE_CNT + 1) * (AGE_UNIT + 1) seconds */
38 + if (secs < 1 || secs > (AGE_CNT_MAX + 1) * (AGE_UNIT_MAX + 1))
41 + /* iterate through all possible age_count to find the closest pair */
42 + for (tmp_age_count = 0; tmp_age_count <= AGE_CNT_MAX; ++tmp_age_count) {
43 + unsigned int tmp_age_unit = secs / (tmp_age_count + 1) - 1;
45 + if (tmp_age_unit <= AGE_UNIT_MAX) {
46 + unsigned int tmp_error = secs -
47 + (tmp_age_count + 1) * (tmp_age_unit + 1);
49 + /* found a closer pair */
50 + if (error > tmp_error) {
52 + age_count = tmp_age_count;
53 + age_unit = tmp_age_unit;
56 + /* found the exact match, so break the loop */
62 + mt7530_write(priv, MT7530_AAC, AGE_CNT(age_count) | AGE_UNIT(age_unit));
67 static void mt7530_setup_port5(struct dsa_switch *ds, phy_interface_t interface)
69 struct mt7530_priv *priv = ds->priv;
70 @@ -2699,6 +2739,7 @@ static const struct dsa_switch_ops mt753
71 .phy_write = mt753x_phy_write,
72 .get_ethtool_stats = mt7530_get_ethtool_stats,
73 .get_sset_count = mt7530_get_sset_count,
74 + .set_ageing_time = mt7530_set_ageing_time,
75 .port_enable = mt7530_port_enable,
76 .port_disable = mt7530_port_disable,
77 .port_change_mtu = mt7530_port_change_mtu,
78 --- a/drivers/net/dsa/mt7530.h
79 +++ b/drivers/net/dsa/mt7530.h
80 @@ -161,6 +161,19 @@ enum mt7530_vlan_egress_attr {
81 MT7530_VLAN_EGRESS_STACK = 3,
84 +/* Register for address age control */
85 +#define MT7530_AAC 0xa0
87 +#define AGE_DIS BIT(20)
89 +#define AGE_CNT_MASK GENMASK(19, 12)
90 +#define AGE_CNT_MAX 0xff
91 +#define AGE_CNT(x) (AGE_CNT_MASK & ((x) << 12))
93 +#define AGE_UNIT_MASK GENMASK(11, 0)
94 +#define AGE_UNIT_MAX 0xfff
95 +#define AGE_UNIT(x) (AGE_UNIT_MASK & (x))
97 /* Register for port STP state control */
98 #define MT7530_SSP_P(x) (0x2000 + ((x) * 0x100))
99 #define FID_PST(x) ((x) & 0x3)