From 6b08d07cac64c0dcf1dbb4584bdf95d0f789a520 Mon Sep 17 00:00:00 2001 From: Lukasz Majewski Date: Wed, 10 Jul 2024 12:06:51 +0200 Subject: [PATCH] leds: trigger: netdev: Add support for tx_err and rx_err notification with LEDs This patch provides support for enabling blinking of LEDs when RX or TX errors are detected. Approach taken in this patch is similar to one for TX or RX data transmission indication (i.e. TRIGGER_NETDEV_TX/RX attribute). One can inspect transmission errors with: ip -s link show eth0 Example LED configuration: cd /sys/devices/platform/amba_pl@0/a001a000.leds/leds/ echo netdev > mode:blue/trigger && \ echo eth0 > mode:blue/device_name && \ echo 1 > mode:blue/tx_err Signed-off-by: Lukasz Majewski Reviewed-by: Andrew Lunn Link: https://lore.kernel.org/r/20240710100651.4059887-1-lukma@denx.de Signed-off-by: Lee Jones --- drivers/leds/trigger/ledtrig-netdev.c | 24 +++++++++++++++++++++--- include/linux/leds.h | 2 ++ 2 files changed, 23 insertions(+), 3 deletions(-) diff --git a/drivers/leds/trigger/ledtrig-netdev.c b/drivers/leds/trigger/ledtrig-netdev.c index 22bba8e97642..4b0863db901a 100644 --- a/drivers/leds/trigger/ledtrig-netdev.c +++ b/drivers/leds/trigger/ledtrig-netdev.c @@ -39,6 +39,8 @@ * (has carrier) or not * tx - LED blinks on transmitted data * rx - LED blinks on receive data + * tx_err - LED blinks on transmit error + * rx_err - LED blinks on receive error * * Note: If the user selects a mode that is not supported by hw, default * behavior is to fall back to software control of the LED. However not every @@ -144,7 +146,9 @@ static void set_baseline_state(struct led_netdev_data *trigger_data) * checking stats */ if (test_bit(TRIGGER_NETDEV_TX, &trigger_data->mode) || - test_bit(TRIGGER_NETDEV_RX, &trigger_data->mode)) + test_bit(TRIGGER_NETDEV_RX, &trigger_data->mode) || + test_bit(TRIGGER_NETDEV_TX_ERR, &trigger_data->mode) || + test_bit(TRIGGER_NETDEV_RX_ERR, &trigger_data->mode)) schedule_delayed_work(&trigger_data->work, 0); } } @@ -337,6 +341,8 @@ static ssize_t netdev_led_attr_show(struct device *dev, char *buf, case TRIGGER_NETDEV_FULL_DUPLEX: case TRIGGER_NETDEV_TX: case TRIGGER_NETDEV_RX: + case TRIGGER_NETDEV_TX_ERR: + case TRIGGER_NETDEV_RX_ERR: bit = attr; break; default: @@ -371,6 +377,8 @@ static ssize_t netdev_led_attr_store(struct device *dev, const char *buf, case TRIGGER_NETDEV_FULL_DUPLEX: case TRIGGER_NETDEV_TX: case TRIGGER_NETDEV_RX: + case TRIGGER_NETDEV_TX_ERR: + case TRIGGER_NETDEV_RX_ERR: bit = attr; break; default: @@ -429,6 +437,8 @@ 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); +DEFINE_NETDEV_TRIGGER(tx_err, TRIGGER_NETDEV_TX_ERR); +DEFINE_NETDEV_TRIGGER(rx_err, TRIGGER_NETDEV_RX_ERR); static ssize_t interval_show(struct device *dev, struct device_attribute *attr, char *buf) @@ -538,6 +548,8 @@ static struct attribute *netdev_trig_attrs[] = { &dev_attr_half_duplex.attr, &dev_attr_rx.attr, &dev_attr_tx.attr, + &dev_attr_rx_err.attr, + &dev_attr_tx_err.attr, &dev_attr_interval.attr, &dev_attr_offloaded.attr, NULL @@ -628,7 +640,9 @@ static void netdev_trig_work(struct work_struct *work) /* If we are not looking for RX/TX then return */ if (!test_bit(TRIGGER_NETDEV_TX, &trigger_data->mode) && - !test_bit(TRIGGER_NETDEV_RX, &trigger_data->mode)) + !test_bit(TRIGGER_NETDEV_RX, &trigger_data->mode) && + !test_bit(TRIGGER_NETDEV_TX_ERR, &trigger_data->mode) && + !test_bit(TRIGGER_NETDEV_RX_ERR, &trigger_data->mode)) return; dev_stats = dev_get_stats(trigger_data->net_dev, &temp); @@ -636,7 +650,11 @@ static void netdev_trig_work(struct work_struct *work) (test_bit(TRIGGER_NETDEV_TX, &trigger_data->mode) ? dev_stats->tx_packets : 0) + (test_bit(TRIGGER_NETDEV_RX, &trigger_data->mode) ? - dev_stats->rx_packets : 0); + dev_stats->rx_packets : 0) + + (test_bit(TRIGGER_NETDEV_TX_ERR, &trigger_data->mode) ? + dev_stats->tx_errors : 0) + + (test_bit(TRIGGER_NETDEV_RX_ERR, &trigger_data->mode) ? + dev_stats->rx_errors : 0); if (trigger_data->last_activity != new_activity) { led_stop_software_blink(trigger_data->led_cdev); diff --git a/include/linux/leds.h b/include/linux/leds.h index 6885603f211b..e5968c3ed4ae 100644 --- a/include/linux/leds.h +++ b/include/linux/leds.h @@ -611,6 +611,8 @@ enum led_trigger_netdev_modes { TRIGGER_NETDEV_FULL_DUPLEX, TRIGGER_NETDEV_TX, TRIGGER_NETDEV_RX, + TRIGGER_NETDEV_TX_ERR, + TRIGGER_NETDEV_RX_ERR, /* Keep last */ __TRIGGER_NETDEV_MAX,