From d3776bdfc98cee205b74b5775bb0e96ced7193f7 Mon Sep 17 00:00:00 2001 From: John Crispin Date: Fri, 4 Mar 2016 08:33:30 +0000 Subject: [PATCH] AR8216: make ARL age time configurable The default TTL for address resolution table entries is 5 minutes for all members of the AR8216 family. This can cause issues if e.g. Wifi clients roam to another AP and their MAC appears on another switch port suddenly. Then the client may not be reachable until the old ARL entry expires. I would have expected the switch to invalidate old entries if it detects the same MAC on another port. But that's not the case. Therefore make the TTL for ARL entries configurable. The effective TTL will always be a multiple of 7 seconds. Signed-off-by: Heiner Kallweit SVN-Revision: 48913 --- .../generic/files/drivers/net/phy/ar8216.c | 59 +++++++++++++++++-- .../generic/files/drivers/net/phy/ar8216.h | 14 +++++ .../generic/files/drivers/net/phy/ar8327.c | 9 +++ .../generic/files/drivers/net/phy/ar8327.h | 2 + 4 files changed, 80 insertions(+), 4 deletions(-) diff --git a/target/linux/generic/files/drivers/net/phy/ar8216.c b/target/linux/generic/files/drivers/net/phy/ar8216.c index a1b9841473..817aca57d5 100644 --- a/target/linux/generic/files/drivers/net/phy/ar8216.c +++ b/target/linux/generic/files/drivers/net/phy/ar8216.c @@ -1076,10 +1076,25 @@ ar8216_set_mirror_regs(struct ar8xxx_priv *priv) AR8216_PORT_CTRL_MIRROR_TX); } +static inline u32 +ar8xxx_age_time_val(int age_time) +{ + return (age_time + AR8XXX_REG_ARL_CTRL_AGE_TIME_SECS / 2) / + AR8XXX_REG_ARL_CTRL_AGE_TIME_SECS; +} + +static inline void +ar8xxx_set_age_time(struct ar8xxx_priv *priv, int reg) +{ + u32 age_time = ar8xxx_age_time_val(priv->arl_age_time); + ar8xxx_rmw(priv, reg, AR8216_ATU_CTRL_AGE_TIME, age_time << AR8216_ATU_CTRL_AGE_TIME_S); +} + int ar8xxx_sw_hw_apply(struct switch_dev *dev) { struct ar8xxx_priv *priv = swdev_to_ar8xxx(dev); + const struct ar8xxx_chip *chip = priv->chip; u8 portmask[AR8X16_MAX_PORTS]; int i, j; @@ -1103,8 +1118,8 @@ ar8xxx_sw_hw_apply(struct switch_dev *dev) portmask[i] |= vp & ~mask; } - priv->chip->vtu_load_vlan(priv, priv->vlan_id[j], - priv->vlan_table[j]); + chip->vtu_load_vlan(priv, priv->vlan_id[j], + priv->vlan_table[j]); } } else { /* vlan disabled: @@ -1120,10 +1135,14 @@ ar8xxx_sw_hw_apply(struct switch_dev *dev) /* update the port destination mask registers and tag settings */ for (i = 0; i < dev->ports; i++) { - priv->chip->setup_port(priv, i, portmask[i]); + chip->setup_port(priv, i, portmask[i]); } - priv->chip->set_mirror_regs(priv); + chip->set_mirror_regs(priv); + + /* set age time */ + if (chip->reg_arl_ctrl) + ar8xxx_set_age_time(priv, chip->reg_arl_ctrl); mutex_unlock(&priv->reg_mutex); return 0; @@ -1151,6 +1170,7 @@ ar8xxx_sw_reset_switch(struct switch_dev *dev) priv->mirror_tx = false; priv->source_port = 0; priv->monitor_port = 0; + priv->arl_age_time = AR8XXX_DEFAULT_ARL_AGE_TIME; chip->init_globals(priv); @@ -1406,6 +1426,34 @@ unlock: return ret; } +int +ar8xxx_sw_set_arl_age_time(struct switch_dev *dev, const struct switch_attr *attr, + struct switch_val *val) +{ + struct ar8xxx_priv *priv = swdev_to_ar8xxx(dev); + int age_time = val->value.i; + u32 age_time_val; + + if (age_time < 0) + return -EINVAL; + + age_time_val = ar8xxx_age_time_val(age_time); + if (age_time_val == 0 || age_time_val > 0xffff) + return -EINVAL; + + priv->arl_age_time = age_time; + return 0; +} + +int +ar8xxx_sw_get_arl_age_time(struct switch_dev *dev, const struct switch_attr *attr, + struct switch_val *val) +{ + struct ar8xxx_priv *priv = swdev_to_ar8xxx(dev); + val->value.i = priv->arl_age_time; + return 0; +} + int ar8xxx_sw_get_arl_table(struct switch_dev *dev, const struct switch_attr *attr, @@ -1633,6 +1681,7 @@ static const struct ar8xxx_chip ar8216_chip = { .reg_port_stats_start = 0x19000, .reg_port_stats_length = 0xa0, + .reg_arl_ctrl = AR8216_REG_ATU_CTRL, .name = "Atheros AR8216", .ports = AR8216_NUM_PORTS, @@ -1662,6 +1711,7 @@ static const struct ar8xxx_chip ar8236_chip = { .reg_port_stats_start = 0x20000, .reg_port_stats_length = 0x100, + .reg_arl_ctrl = AR8216_REG_ATU_CTRL, .name = "Atheros AR8236", .ports = AR8216_NUM_PORTS, @@ -1691,6 +1741,7 @@ static const struct ar8xxx_chip ar8316_chip = { .reg_port_stats_start = 0x20000, .reg_port_stats_length = 0x100, + .reg_arl_ctrl = AR8216_REG_ATU_CTRL, .name = "Atheros AR8316", .ports = AR8216_NUM_PORTS, diff --git a/target/linux/generic/files/drivers/net/phy/ar8216.h b/target/linux/generic/files/drivers/net/phy/ar8216.h index 14fe928fe0..fb961ff04c 100644 --- a/target/linux/generic/files/drivers/net/phy/ar8216.h +++ b/target/linux/generic/files/drivers/net/phy/ar8216.h @@ -33,6 +33,9 @@ #define AR8X16_PROBE_RETRIES 10 #define AR8X16_MAX_PORTS 8 +#define AR8XXX_REG_ARL_CTRL_AGE_TIME_SECS 7 +#define AR8XXX_DEFAULT_ARL_AGE_TIME 300 + /* Atheros specific MII registers */ #define MII_ATH_MMD_ADDR 0x0d #define MII_ATH_MMD_DATA 0x0e @@ -384,6 +387,8 @@ struct ar8xxx_chip { unsigned reg_port_stats_start; unsigned reg_port_stats_length; + unsigned reg_arl_ctrl; + int (*hw_init)(struct ar8xxx_priv *priv); void (*cleanup)(struct ar8xxx_priv *priv); @@ -449,6 +454,7 @@ struct ar8xxx_priv { u8 vlan_table[AR8X16_MAX_VLANS]; u8 vlan_tagged; u16 pvid[AR8X16_MAX_PORTS]; + int arl_age_time; /* mirroring */ bool mirror_rx; @@ -539,6 +545,14 @@ ar8xxx_sw_get_port_mib(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val); int +ar8xxx_sw_get_arl_age_time(struct switch_dev *dev, + const struct switch_attr *attr, + struct switch_val *val); +int +ar8xxx_sw_set_arl_age_time(struct switch_dev *dev, + const struct switch_attr *attr, + struct switch_val *val); +int ar8xxx_sw_get_arl_table(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val); diff --git a/target/linux/generic/files/drivers/net/phy/ar8327.c b/target/linux/generic/files/drivers/net/phy/ar8327.c index 02fd2e77bf..9c232382b5 100644 --- a/target/linux/generic/files/drivers/net/phy/ar8327.c +++ b/target/linux/generic/files/drivers/net/phy/ar8327.c @@ -1274,6 +1274,13 @@ static const struct switch_attr ar8327_sw_attr_globals[] = { .get = ar8xxx_sw_get_mirror_source_port, .max = AR8327_NUM_PORTS - 1 }, + { + .type = SWITCH_TYPE_INT, + .name = "arl_age_time", + .description = "ARL age time (secs)", + .set = ar8xxx_sw_set_arl_age_time, + .get = ar8xxx_sw_get_arl_age_time, + }, { .type = SWITCH_TYPE_STRING, .name = "arl_table", @@ -1377,6 +1384,7 @@ const struct ar8xxx_chip ar8327_chip = { .reg_port_stats_start = 0x1000, .reg_port_stats_length = 0x100, + .reg_arl_ctrl = AR8327_REG_ARL_CTRL, .hw_init = ar8327_hw_init, .cleanup = ar8327_cleanup, @@ -1411,6 +1419,7 @@ const struct ar8xxx_chip ar8337_chip = { .reg_port_stats_start = 0x1000, .reg_port_stats_length = 0x100, + .reg_arl_ctrl = AR8327_REG_ARL_CTRL, .hw_init = ar8327_hw_init, .cleanup = ar8327_cleanup, diff --git a/target/linux/generic/files/drivers/net/phy/ar8327.h b/target/linux/generic/files/drivers/net/phy/ar8327.h index 4aca754bc8..e8dad35d11 100644 --- a/target/linux/generic/files/drivers/net/phy/ar8327.h +++ b/target/linux/generic/files/drivers/net/phy/ar8327.h @@ -244,6 +244,8 @@ #define AR8327_VTU_FUNC1_VID_S 16 #define AR8327_VTU_FUNC1_BUSY BIT(31) +#define AR8327_REG_ARL_CTRL 0x0618 + #define AR8327_REG_FWD_CTRL0 0x620 #define AR8327_FWD_CTRL0_CPU_PORT_EN BIT(10) #define AR8327_FWD_CTRL0_MIRROR_PORT BITS(4, 4) -- 2.25.1