From 4834565bb4ebb9a0089afb047eea091346a91952 Mon Sep 17 00:00:00 2001 From: DENG Qingfang Date: Thu, 3 Feb 2022 20:07:01 +0800 Subject: [PATCH] kernel: backport MT7530 ageing time support MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Allow setting ageing time from 1 to 1,048,576 seconds. Signed-off-by: DENG Qingfang Tested-by: Arınç ÜNAL Tested-by: Stijn Tintel --- ...a-mt7530-support-setting-ageing-time.patch | 99 +++++++++++++++++++ 1 file changed, 99 insertions(+) create mode 100644 target/linux/generic/backport-5.10/764-v5.11-net-dsa-mt7530-support-setting-ageing-time.patch diff --git a/target/linux/generic/backport-5.10/764-v5.11-net-dsa-mt7530-support-setting-ageing-time.patch b/target/linux/generic/backport-5.10/764-v5.11-net-dsa-mt7530-support-setting-ageing-time.patch new file mode 100644 index 0000000000..44fa40eabe --- /dev/null +++ b/target/linux/generic/backport-5.10/764-v5.11-net-dsa-mt7530-support-setting-ageing-time.patch @@ -0,0 +1,99 @@ +From ea6d5c924e391872d402acac38461a5f8261e57f Mon Sep 17 00:00:00 2001 +From: DENG Qingfang +Date: Tue, 8 Dec 2020 15:00:28 +0800 +Subject: [PATCH] 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 +Reviewed-by: Andrew Lunn +Reviewed-by: Vladimir Oltean +Reviewed-by: Florian Fainelli +Signed-off-by: David S. Miller +--- + drivers/net/dsa/mt7530.c | 41 ++++++++++++++++++++++++++++++++++++++++ + drivers/net/dsa/mt7530.h | 13 +++++++++++++ + 2 files changed, 54 insertions(+) + +--- a/drivers/net/dsa/mt7530.c ++++ b/drivers/net/dsa/mt7530.c +@@ -870,6 +870,46 @@ mt7530_get_sset_count(struct dsa_switch + 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; +@@ -2699,6 +2739,7 @@ static const struct dsa_switch_ops mt753 + .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, +--- a/drivers/net/dsa/mt7530.h ++++ b/drivers/net/dsa/mt7530.h +@@ -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) -- 2.30.2