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generic: 6.1: backport LEDs patch adding additional modes

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Backport LEDs patch adding additional modes for split link speed and
half/full duplex state.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
This commit is contained in:
Christian Marangi 2023-06-21 11:35:33 +02:00
parent 984786a2f7
commit adc3ee1cc8
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3 changed files with 425 additions and 0 deletions
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242
target/linux/generic/backport-6.1/805-v6.5-01-leds-trigger-netdev-add-additional-specific-link-spe.patch Normal file
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@ -0,0 +1,242 @@
From d5e01266e7f5fa12400d4c8aa4e86fe89dcc61e9 Mon Sep 17 00:00:00 2001
From: Christian Marangi <ansuelsmth@gmail.com>
Date: Mon, 19 Jun 2023 22:46:58 +0200
Subject: [PATCH 1/3] leds: trigger: netdev: add additional specific link speed
mode
Add additional modes for specific link speed. Use ethtool APIs to get the
current link speed and enable the LED accordingly. Under netdev event
handler the rtnl lock is already held and is not needed to be set to
access ethtool APIs.
This is especially useful for PHY and Switch that supports LEDs hw
control for specific link speed. (example scenario a PHY that have 2 LED
connected one green and one orange where the green is turned on with
1000mbps speed and orange is turned on with 10mpbs speed)
On mode set from sysfs we check if we have enabled split link speed mode
and reject enabling generic link mode to prevent wrong and redundant
configuration.
Rework logic on the set baseline state to support these new modes to
select if we need to turn on or off the LED.
Add additional modes:
- link_10: Turn on LED when link speed is 10mbps
- link_100: Turn on LED when link speed is 100mbps
- link_1000: Turn on LED when link speed is 1000mbps
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Lee Jones <lee@kernel.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
drivers/leds/trigger/ledtrig-netdev.c | 80 +++++++++++++++++++++++----
include/linux/leds.h | 3 +
2 files changed, 73 insertions(+), 10 deletions(-)
--- a/drivers/leds/trigger/ledtrig-netdev.c
+++ b/drivers/leds/trigger/ledtrig-netdev.c
@@ -13,6 +13,7 @@
#include <linux/atomic.h>
#include <linux/ctype.h>
#include <linux/device.h>
+#include <linux/ethtool.h>
#include <linux/init.h>
#include <linux/jiffies.h>
#include <linux/kernel.h>
@@ -21,6 +22,7 @@
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/mutex.h>
+#include <linux/rtnetlink.h>
#include <linux/timer.h>
#include "../leds.h"
@@ -52,6 +54,8 @@ struct led_netdev_data {
unsigned int last_activity;
unsigned long mode;
+ int link_speed;
+
bool carrier_link_up;
bool hw_control;
};
@@ -77,7 +81,24 @@ static void set_baseline_state(struct le
if (!trigger_data->carrier_link_up) {
led_set_brightness(led_cdev, LED_OFF);
} else {
+ bool blink_on = false;
+
if (test_bit(TRIGGER_NETDEV_LINK, &trigger_data->mode))
+ blink_on = true;
+
+ if (test_bit(TRIGGER_NETDEV_LINK_10, &trigger_data->mode) &&
+ trigger_data->link_speed == SPEED_10)
+ blink_on = true;
+
+ if (test_bit(TRIGGER_NETDEV_LINK_100, &trigger_data->mode) &&
+ trigger_data->link_speed == SPEED_100)
+ blink_on = true;
+
+ if (test_bit(TRIGGER_NETDEV_LINK_1000, &trigger_data->mode) &&
+ trigger_data->link_speed == SPEED_1000)
+ blink_on = true;
+
+ if (blink_on)
led_set_brightness(led_cdev,
led_cdev->blink_brightness);
else
@@ -161,6 +182,18 @@ static bool can_hw_control(struct led_ne
return true;
}
+static void get_device_state(struct led_netdev_data *trigger_data)
+{
+ struct ethtool_link_ksettings cmd;
+
+ trigger_data->carrier_link_up = netif_carrier_ok(trigger_data->net_dev);
+ if (!trigger_data->carrier_link_up)
+ return;
+
+ if (!__ethtool_get_link_ksettings(trigger_data->net_dev, &cmd))
+ trigger_data->link_speed = cmd.base.speed;
+}
+
static ssize_t device_name_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
@@ -196,8 +229,12 @@ static int set_device_name(struct led_ne
dev_get_by_name(&init_net, trigger_data->device_name);
trigger_data->carrier_link_up = false;
- if (trigger_data->net_dev != NULL)
- trigger_data->carrier_link_up = netif_carrier_ok(trigger_data->net_dev);
+ trigger_data->link_speed = SPEED_UNKNOWN;
+ if (trigger_data->net_dev != NULL) {
+ rtnl_lock();
+ get_device_state(trigger_data);
+ rtnl_unlock();
+ }
trigger_data->last_activity = 0;
@@ -234,6 +271,9 @@ static ssize_t netdev_led_attr_show(stru
switch (attr) {
case TRIGGER_NETDEV_LINK:
+ case TRIGGER_NETDEV_LINK_10:
+ case TRIGGER_NETDEV_LINK_100:
+ case TRIGGER_NETDEV_LINK_1000:
case TRIGGER_NETDEV_TX:
case TRIGGER_NETDEV_RX:
bit = attr;
@@ -249,7 +289,7 @@ static ssize_t netdev_led_attr_store(str
size_t size, enum led_trigger_netdev_modes attr)
{
struct led_netdev_data *trigger_data = led_trigger_get_drvdata(dev);
- unsigned long state;
+ unsigned long state, mode = trigger_data->mode;
int ret;
int bit;
@@ -259,6 +299,9 @@ static ssize_t netdev_led_attr_store(str
switch (attr) {
case TRIGGER_NETDEV_LINK:
+ case TRIGGER_NETDEV_LINK_10:
+ case TRIGGER_NETDEV_LINK_100:
+ case TRIGGER_NETDEV_LINK_1000:
case TRIGGER_NETDEV_TX:
case TRIGGER_NETDEV_RX:
bit = attr;
@@ -267,13 +310,20 @@ static ssize_t netdev_led_attr_store(str
return -EINVAL;
}
- cancel_delayed_work_sync(&trigger_data->work);
-
if (state)
- set_bit(bit, &trigger_data->mode);
+ set_bit(bit, &mode);
else
- clear_bit(bit, &trigger_data->mode);
+ clear_bit(bit, &mode);
+
+ if (test_bit(TRIGGER_NETDEV_LINK, &mode) &&
+ (test_bit(TRIGGER_NETDEV_LINK_10, &mode) ||
+ test_bit(TRIGGER_NETDEV_LINK_100, &mode) ||
+ test_bit(TRIGGER_NETDEV_LINK_1000, &mode)))
+ return -EINVAL;
+
+ cancel_delayed_work_sync(&trigger_data->work);
+ trigger_data->mode = mode;
trigger_data->hw_control = can_hw_control(trigger_data);
set_baseline_state(trigger_data);
@@ -295,6 +345,9 @@ static ssize_t netdev_led_attr_store(str
static DEVICE_ATTR_RW(trigger_name)
DEFINE_NETDEV_TRIGGER(link, TRIGGER_NETDEV_LINK);
+DEFINE_NETDEV_TRIGGER(link_10, TRIGGER_NETDEV_LINK_10);
+DEFINE_NETDEV_TRIGGER(link_100, TRIGGER_NETDEV_LINK_100);
+DEFINE_NETDEV_TRIGGER(link_1000, TRIGGER_NETDEV_LINK_1000);
DEFINE_NETDEV_TRIGGER(tx, TRIGGER_NETDEV_TX);
DEFINE_NETDEV_TRIGGER(rx, TRIGGER_NETDEV_RX);
@@ -338,6 +391,9 @@ static DEVICE_ATTR_RW(interval);
static struct attribute *netdev_trig_attrs[] = {
&dev_attr_device_name.attr,
&dev_attr_link.attr,
+ &dev_attr_link_10.attr,
+ &dev_attr_link_100.attr,
+ &dev_attr_link_1000.attr,
&dev_attr_rx.attr,
&dev_attr_tx.attr,
&dev_attr_interval.attr,
@@ -368,9 +424,10 @@ static int netdev_trig_notify(struct not
mutex_lock(&trigger_data->lock);
trigger_data->carrier_link_up = false;
+ trigger_data->link_speed = SPEED_UNKNOWN;
switch (evt) {
case NETDEV_CHANGENAME:
- trigger_data->carrier_link_up = netif_carrier_ok(dev);
+ get_device_state(trigger_data);
fallthrough;
case NETDEV_REGISTER:
if (trigger_data->net_dev)
@@ -384,7 +441,7 @@ static int netdev_trig_notify(struct not
break;
case NETDEV_UP:
case NETDEV_CHANGE:
- trigger_data->carrier_link_up = netif_carrier_ok(dev);
+ get_device_state(trigger_data);
break;
}
@@ -427,7 +484,10 @@ static void netdev_trig_work(struct work
if (trigger_data->last_activity != new_activity) {
led_stop_software_blink(trigger_data->led_cdev);
- invert = test_bit(TRIGGER_NETDEV_LINK, &trigger_data->mode);
+ invert = test_bit(TRIGGER_NETDEV_LINK, &trigger_data->mode) ||
+ test_bit(TRIGGER_NETDEV_LINK_10, &trigger_data->mode) ||
+ test_bit(TRIGGER_NETDEV_LINK_100, &trigger_data->mode) ||
+ test_bit(TRIGGER_NETDEV_LINK_1000, &trigger_data->mode);
interval = jiffies_to_msecs(
atomic_read(&trigger_data->interval));
/* base state is ON (link present) */
--- a/include/linux/leds.h
+++ b/include/linux/leds.h
@@ -530,6 +530,9 @@ static inline void *led_get_trigger_data
/* Trigger specific enum */
enum led_trigger_netdev_modes {
TRIGGER_NETDEV_LINK = 0,
+ TRIGGER_NETDEV_LINK_10,
+ TRIGGER_NETDEV_LINK_100,
+ TRIGGER_NETDEV_LINK_1000,
TRIGGER_NETDEV_TX,
TRIGGER_NETDEV_RX,

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From f22f95b9ff1551c9bab13104131929f33d51f23f Mon Sep 17 00:00:00 2001
From: Christian Marangi <ansuelsmth@gmail.com>
Date: Mon, 19 Jun 2023 22:46:59 +0200
Subject: [PATCH 2/3] leds: trigger: netdev: add additional specific link
duplex mode
Add additional modes for specific link duplex. Use ethtool APIs to get the
current link duplex and enable the LED accordingly. Under netdev event
handler the rtnl lock is already held and is not needed to be set to
access ethtool APIs.
This is especially useful for PHY and Switch that supports LEDs hw
control for specific link duplex.
Add additional modes:
- half_duplex: Turn on LED when link is half duplex
- full_duplex: Turn on LED when link is full duplex
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Lee Jones <lee@kernel.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
drivers/leds/trigger/ledtrig-netdev.c | 27 +++++++++++++++++++++++++--
include/linux/leds.h | 2 ++
2 files changed, 27 insertions(+), 2 deletions(-)
--- a/drivers/leds/trigger/ledtrig-netdev.c
+++ b/drivers/leds/trigger/ledtrig-netdev.c
@@ -55,6 +55,7 @@ struct led_netdev_data {
unsigned long mode;
int link_speed;
+ u8 duplex;
bool carrier_link_up;
bool hw_control;
@@ -98,6 +99,14 @@ static void set_baseline_state(struct le
trigger_data->link_speed == SPEED_1000)
blink_on = true;
+ if (test_bit(TRIGGER_NETDEV_HALF_DUPLEX, &trigger_data->mode) &&
+ trigger_data->duplex == DUPLEX_HALF)
+ blink_on = true;
+
+ if (test_bit(TRIGGER_NETDEV_FULL_DUPLEX, &trigger_data->mode) &&
+ trigger_data->duplex == DUPLEX_FULL)
+ blink_on = true;
+
if (blink_on)
led_set_brightness(led_cdev,
led_cdev->blink_brightness);
@@ -190,8 +199,10 @@ static void get_device_state(struct led_
if (!trigger_data->carrier_link_up)
return;
- if (!__ethtool_get_link_ksettings(trigger_data->net_dev, &cmd))
+ if (!__ethtool_get_link_ksettings(trigger_data->net_dev, &cmd)) {
trigger_data->link_speed = cmd.base.speed;
+ trigger_data->duplex = cmd.base.duplex;
+ }
}
static ssize_t device_name_show(struct device *dev,
@@ -230,6 +241,7 @@ static int set_device_name(struct led_ne
trigger_data->carrier_link_up = false;
trigger_data->link_speed = SPEED_UNKNOWN;
+ trigger_data->duplex = DUPLEX_UNKNOWN;
if (trigger_data->net_dev != NULL) {
rtnl_lock();
get_device_state(trigger_data);
@@ -274,6 +286,8 @@ static ssize_t netdev_led_attr_show(stru
case TRIGGER_NETDEV_LINK_10:
case TRIGGER_NETDEV_LINK_100:
case TRIGGER_NETDEV_LINK_1000:
+ case TRIGGER_NETDEV_HALF_DUPLEX:
+ case TRIGGER_NETDEV_FULL_DUPLEX:
case TRIGGER_NETDEV_TX:
case TRIGGER_NETDEV_RX:
bit = attr;
@@ -302,6 +316,8 @@ static ssize_t netdev_led_attr_store(str
case TRIGGER_NETDEV_LINK_10:
case TRIGGER_NETDEV_LINK_100:
case TRIGGER_NETDEV_LINK_1000:
+ case TRIGGER_NETDEV_HALF_DUPLEX:
+ case TRIGGER_NETDEV_FULL_DUPLEX:
case TRIGGER_NETDEV_TX:
case TRIGGER_NETDEV_RX:
bit = attr;
@@ -348,6 +364,8 @@ DEFINE_NETDEV_TRIGGER(link, TRIGGER_NETD
DEFINE_NETDEV_TRIGGER(link_10, TRIGGER_NETDEV_LINK_10);
DEFINE_NETDEV_TRIGGER(link_100, TRIGGER_NETDEV_LINK_100);
DEFINE_NETDEV_TRIGGER(link_1000, TRIGGER_NETDEV_LINK_1000);
+DEFINE_NETDEV_TRIGGER(half_duplex, TRIGGER_NETDEV_HALF_DUPLEX);
+DEFINE_NETDEV_TRIGGER(full_duplex, TRIGGER_NETDEV_FULL_DUPLEX);
DEFINE_NETDEV_TRIGGER(tx, TRIGGER_NETDEV_TX);
DEFINE_NETDEV_TRIGGER(rx, TRIGGER_NETDEV_RX);
@@ -394,6 +412,8 @@ static struct attribute *netdev_trig_att
&dev_attr_link_10.attr,
&dev_attr_link_100.attr,
&dev_attr_link_1000.attr,
+ &dev_attr_full_duplex.attr,
+ &dev_attr_half_duplex.attr,
&dev_attr_rx.attr,
&dev_attr_tx.attr,
&dev_attr_interval.attr,
@@ -425,6 +445,7 @@ static int netdev_trig_notify(struct not
trigger_data->carrier_link_up = false;
trigger_data->link_speed = SPEED_UNKNOWN;
+ trigger_data->duplex = DUPLEX_UNKNOWN;
switch (evt) {
case NETDEV_CHANGENAME:
get_device_state(trigger_data);
@@ -487,7 +508,9 @@ static void netdev_trig_work(struct work
invert = test_bit(TRIGGER_NETDEV_LINK, &trigger_data->mode) ||
test_bit(TRIGGER_NETDEV_LINK_10, &trigger_data->mode) ||
test_bit(TRIGGER_NETDEV_LINK_100, &trigger_data->mode) ||
- test_bit(TRIGGER_NETDEV_LINK_1000, &trigger_data->mode);
+ test_bit(TRIGGER_NETDEV_LINK_1000, &trigger_data->mode) ||
+ test_bit(TRIGGER_NETDEV_HALF_DUPLEX, &trigger_data->mode) ||
+ test_bit(TRIGGER_NETDEV_FULL_DUPLEX, &trigger_data->mode);
interval = jiffies_to_msecs(
atomic_read(&trigger_data->interval));
/* base state is ON (link present) */
--- a/include/linux/leds.h
+++ b/include/linux/leds.h
@@ -533,6 +533,8 @@ enum led_trigger_netdev_modes {
TRIGGER_NETDEV_LINK_10,
TRIGGER_NETDEV_LINK_100,
TRIGGER_NETDEV_LINK_1000,
+ TRIGGER_NETDEV_HALF_DUPLEX,
+ TRIGGER_NETDEV_FULL_DUPLEX,
TRIGGER_NETDEV_TX,
TRIGGER_NETDEV_RX,

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From b655892ffd6d89b0c7407e099c40dbde82ee3f03 Mon Sep 17 00:00:00 2001
From: Christian Marangi <ansuelsmth@gmail.com>
Date: Mon, 19 Jun 2023 22:47:00 +0200
Subject: [PATCH 3/3] leds: trigger: netdev: expose hw_control status via sysfs
Expose hw_control status via sysfs for the netdev trigger to give
userspace better understanding of the current state of the trigger and
the LED.
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Acked-by: Lee Jones <lee@kernel.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
drivers/leds/trigger/ledtrig-netdev.c | 11 +++++++++++
1 file changed, 11 insertions(+)
--- a/drivers/leds/trigger/ledtrig-netdev.c
+++ b/drivers/leds/trigger/ledtrig-netdev.c
@@ -406,6 +406,16 @@ static ssize_t interval_store(struct dev
static DEVICE_ATTR_RW(interval);
+static ssize_t hw_control_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct led_netdev_data *trigger_data = led_trigger_get_drvdata(dev);
+
+ return sprintf(buf, "%d\n", trigger_data->hw_control);
+}
+
+static DEVICE_ATTR_RO(hw_control);
+
static struct attribute *netdev_trig_attrs[] = {
&dev_attr_device_name.attr,
&dev_attr_link.attr,
@@ -417,6 +427,7 @@ static struct attribute *netdev_trig_att
&dev_attr_rx.attr,
&dev_attr_tx.attr,
&dev_attr_interval.attr,
+ &dev_attr_hw_control.attr,
NULL
};
ATTRIBUTE_GROUPS(netdev_trig);