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authorChuanhong Guo <gch981213@gmail.com>2019-04-09 21:32:32 +0800
committerPetr Štetiar <ynezz@true.cz>2019-05-20 21:17:45 +0200
commit107dc4326ccfaff27bd1e698b8bc7fb942233559 (patch)
tree03bac9ce58d91967a902011e8d2a64e4cf1925d7 /target/linux/generic/files/drivers
parentdf6e8c8771d5457048a5cb1e510c6bc73bd4c173 (diff)
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generic: ar8216: add mib_poll_interval switch attribute
This allows specifying interval of polling MIB counters from userspace and allow completely turning off MIB counter support by setting mib_poll_interval to 0. Since MIB counter polling is a heavy CPU load for GPIO emulated MDIO bus, disable this behavior by default. Those who wants to use swconfig LEDs can enable them with qca,mib-poll-interval dts property or with swconfig command. Fixes: FS#2230 ("kworker spikes 100% cpu every 2 second.") Signed-off-by: Chuanhong Guo <gch981213@gmail.com>
Diffstat (limited to 'target/linux/generic/files/drivers')
-rw-r--r--target/linux/generic/files/drivers/net/phy/ar8216.c56
-rw-r--r--target/linux/generic/files/drivers/net/phy/ar8216.h8
-rw-r--r--target/linux/generic/files/drivers/net/phy/ar8327.c7
3 files changed, 63 insertions, 8 deletions
diff --git a/target/linux/generic/files/drivers/net/phy/ar8216.c b/target/linux/generic/files/drivers/net/phy/ar8216.c
index a2c42d18e6..748a626070 100644
--- a/target/linux/generic/files/drivers/net/phy/ar8216.c
+++ b/target/linux/generic/files/drivers/net/phy/ar8216.c
@@ -42,8 +42,6 @@
extern const struct ar8xxx_chip ar8327_chip;
extern const struct ar8xxx_chip ar8337_chip;
-#define AR8XXX_MIB_WORK_DELAY 2000 /* msecs */
-
#define MIB_DESC(_s , _o, _n) \
{ \
.size = (_s), \
@@ -136,6 +134,11 @@ const struct ar8xxx_mib_desc ar8236_mibs[39] = {
static DEFINE_MUTEX(ar8xxx_dev_list_lock);
static LIST_HEAD(ar8xxx_dev_list);
+static void
+ar8xxx_mib_start(struct ar8xxx_priv *priv);
+static void
+ar8xxx_mib_stop(struct ar8xxx_priv *priv);
+
/* inspired by phy_poll_reset in drivers/net/phy/phy_device.c */
static int
ar8xxx_phy_poll_reset(struct mii_bus *bus)
@@ -1445,6 +1448,36 @@ unlock:
}
int
+ar8xxx_sw_set_mib_poll_interval(struct switch_dev *dev,
+ const struct switch_attr *attr,
+ struct switch_val *val)
+{
+ struct ar8xxx_priv *priv = swdev_to_ar8xxx(dev);
+
+ if (!ar8xxx_has_mib_counters(priv))
+ return -EOPNOTSUPP;
+
+ ar8xxx_mib_stop(priv);
+ priv->mib_poll_interval = val->value.i;
+ ar8xxx_mib_start(priv);
+
+ return 0;
+}
+
+int
+ar8xxx_sw_get_mib_poll_interval(struct switch_dev *dev,
+ const struct switch_attr *attr,
+ struct switch_val *val)
+{
+ struct ar8xxx_priv *priv = swdev_to_ar8xxx(dev);
+
+ if (!ar8xxx_has_mib_counters(priv))
+ return -EOPNOTSUPP;
+ val->value.i = priv->mib_poll_interval;
+ return 0;
+}
+
+int
ar8xxx_sw_set_mirror_rx_enable(struct switch_dev *dev,
const struct switch_attr *attr,
struct switch_val *val)
@@ -1615,7 +1648,7 @@ ar8xxx_sw_get_port_mib(struct switch_dev *dev,
int i, len = 0;
bool mib_stats_empty = true;
- if (!ar8xxx_has_mib_counters(priv))
+ if (!ar8xxx_has_mib_counters(priv) || !priv->mib_poll_interval)
return -EOPNOTSUPP;
port = val->port_vlan;
@@ -1807,7 +1840,7 @@ ar8xxx_sw_get_port_stats(struct switch_dev *dev, int port,
struct ar8xxx_priv *priv = swdev_to_ar8xxx(dev);
u64 *mib_stats;
- if (!ar8xxx_has_mib_counters(priv))
+ if (!ar8xxx_has_mib_counters(priv) || !priv->mib_poll_interval)
return -EOPNOTSUPP;
if (!(priv->chip->mib_rxb_id || priv->chip->mib_txb_id))
@@ -1859,6 +1892,13 @@ static const struct switch_attr ar8xxx_sw_attr_globals[] = {
},
{
.type = SWITCH_TYPE_INT,
+ .name = "ar8xxx_mib_poll_interval",
+ .description = "MIB polling interval in msecs (0 to disable)",
+ .set = ar8xxx_sw_set_mib_poll_interval,
+ .get = ar8xxx_sw_get_mib_poll_interval
+ },
+ {
+ .type = SWITCH_TYPE_INT,
.name = "enable_mirror_rx",
.description = "Enable mirroring of RX packets",
.set = ar8xxx_sw_set_mirror_rx_enable,
@@ -2234,7 +2274,7 @@ ar8xxx_mib_init(struct ar8xxx_priv *priv)
static void
ar8xxx_mib_start(struct ar8xxx_priv *priv)
{
- if (!ar8xxx_has_mib_counters(priv))
+ if (!ar8xxx_has_mib_counters(priv) || !priv->mib_poll_interval)
return;
schedule_delayed_work(&priv->mib_work,
@@ -2244,7 +2284,7 @@ ar8xxx_mib_start(struct ar8xxx_priv *priv)
static void
ar8xxx_mib_stop(struct ar8xxx_priv *priv)
{
- if (!ar8xxx_has_mib_counters(priv))
+ if (!ar8xxx_has_mib_counters(priv) || !priv->mib_poll_interval)
return;
cancel_delayed_work_sync(&priv->mib_work);
@@ -2516,7 +2556,7 @@ ar8xxx_phy_probe(struct phy_device *phydev)
ret = of_property_read_u32(priv->pdev->of_node, "qca,mib-poll-interval",
&priv->mib_poll_interval);
if (ret)
- priv->mib_poll_interval = AR8XXX_MIB_WORK_DELAY;
+ priv->mib_poll_interval = 0;
ret = ar8xxx_id_chip(priv);
if (ret)
@@ -2688,7 +2728,7 @@ ar8xxx_mdiodev_probe(struct mdio_device *mdiodev)
ret = of_property_read_u32(priv->pdev->of_node, "qca,mib-poll-interval",
&priv->mib_poll_interval);
if (ret)
- priv->mib_poll_interval = AR8XXX_MIB_WORK_DELAY;
+ priv->mib_poll_interval = 0;
ret = ar8xxx_read_id(priv);
if (ret)
diff --git a/target/linux/generic/files/drivers/net/phy/ar8216.h b/target/linux/generic/files/drivers/net/phy/ar8216.h
index 35274b480a..8f77c916c0 100644
--- a/target/linux/generic/files/drivers/net/phy/ar8216.h
+++ b/target/linux/generic/files/drivers/net/phy/ar8216.h
@@ -544,6 +544,14 @@ ar8xxx_sw_set_reset_mibs(struct switch_dev *dev,
const struct switch_attr *attr,
struct switch_val *val);
int
+ar8xxx_sw_set_mib_poll_interval(struct switch_dev *dev,
+ const struct switch_attr *attr,
+ struct switch_val *val);
+int
+ar8xxx_sw_get_mib_poll_interval(struct switch_dev *dev,
+ const struct switch_attr *attr,
+ struct switch_val *val);
+int
ar8xxx_sw_set_mirror_rx_enable(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 b0da346314..c2964169eb 100644
--- a/target/linux/generic/files/drivers/net/phy/ar8327.c
+++ b/target/linux/generic/files/drivers/net/phy/ar8327.c
@@ -1323,6 +1323,13 @@ static const struct switch_attr ar8327_sw_attr_globals[] = {
},
{
.type = SWITCH_TYPE_INT,
+ .name = "ar8xxx_mib_poll_interval",
+ .description = "MIB polling interval in msecs (0 to disable)",
+ .set = ar8xxx_sw_set_mib_poll_interval,
+ .get = ar8xxx_sw_get_mib_poll_interval
+ },
+ {
+ .type = SWITCH_TYPE_INT,
.name = "enable_mirror_rx",
.description = "Enable mirroring of RX packets",
.set = ar8xxx_sw_set_mirror_rx_enable,