target/linux/generic/backport-6.6/805-v6.5-02-leds-trigger-netdev-add-additional-specific-link-dup.patch

   1 From f22f95b9ff1551c9bab13104131929f33d51f23f Mon Sep 17 00:00:00 2001
   2 From: Christian Marangi <ansuelsmth@gmail.com>
   3 Date: Mon, 19 Jun 2023 22:46:59 +0200
   4 Subject: [PATCH 2/3] leds: trigger: netdev: add additional specific link
   5  duplex mode
   6
   7 Add additional modes for specific link duplex. Use ethtool APIs to get the
   8 current link duplex and enable the LED accordingly. Under netdev event
   9 handler the rtnl lock is already held and is not needed to be set to
  10 access ethtool APIs.
  11
  12 This is especially useful for PHY and Switch that supports LEDs hw
  13 control for specific link duplex.
  14
  15 Add additional modes:
  16 - half_duplex: Turn on LED when link is half duplex
  17 - full_duplex: Turn on LED when link is full duplex
  18
  19 Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
  20 Reviewed-by: Andrew Lunn <andrew@lunn.ch>
  21 Acked-by: Lee Jones <lee@kernel.org>
  22 Signed-off-by: Jakub Kicinski <kuba@kernel.org>
  23 ---
  24  drivers/leds/trigger/ledtrig-netdev.c | 27 +++++++++++++++++++++++++--
  25  include/linux/leds.h                  |  2 ++
  26  2 files changed, 27 insertions(+), 2 deletions(-)
  27
  28 --- a/drivers/leds/trigger/ledtrig-netdev.c
  29 +++ b/drivers/leds/trigger/ledtrig-netdev.c
  30 @@ -55,6 +55,7 @@ struct led_netdev_data {
  31
  32         unsigned long mode;
  33         int link_speed;
  34 +       u8 duplex;
  35
  36         bool carrier_link_up;
  37         bool hw_control;
  38 @@ -98,6 +99,14 @@ static void set_baseline_state(struct le
  39                     trigger_data->link_speed == SPEED_1000)
  40                         blink_on = true;
  41
  42 +               if (test_bit(TRIGGER_NETDEV_HALF_DUPLEX, &trigger_data->mode) &&
  43 +                   trigger_data->duplex == DUPLEX_HALF)
  44 +                       blink_on = true;
  45 +
  46 +               if (test_bit(TRIGGER_NETDEV_FULL_DUPLEX, &trigger_data->mode) &&
  47 +                   trigger_data->duplex == DUPLEX_FULL)
  48 +                       blink_on = true;
  49 +
  50                 if (blink_on)
  51                         led_set_brightness(led_cdev,
  52                                            led_cdev->blink_brightness);
  53 @@ -190,8 +199,10 @@ static void get_device_state(struct led_
  54         if (!trigger_data->carrier_link_up)
  55                 return;
  56
  57 -       if (!__ethtool_get_link_ksettings(trigger_data->net_dev, &cmd))
  58 +       if (!__ethtool_get_link_ksettings(trigger_data->net_dev, &cmd)) {
  59                 trigger_data->link_speed = cmd.base.speed;
  60 +               trigger_data->duplex = cmd.base.duplex;
  61 +       }
  62  }
  63
  64  static ssize_t device_name_show(struct device *dev,
  65 @@ -230,6 +241,7 @@ static int set_device_name(struct led_ne
  66
  67         trigger_data->carrier_link_up = false;
  68         trigger_data->link_speed = SPEED_UNKNOWN;
  69 +       trigger_data->duplex = DUPLEX_UNKNOWN;
  70         if (trigger_data->net_dev != NULL) {
  71                 rtnl_lock();
  72                 get_device_state(trigger_data);
  73 @@ -274,6 +286,8 @@ static ssize_t netdev_led_attr_show(stru
  74         case TRIGGER_NETDEV_LINK_10:
  75         case TRIGGER_NETDEV_LINK_100:
  76         case TRIGGER_NETDEV_LINK_1000:
  77 +       case TRIGGER_NETDEV_HALF_DUPLEX:
  78 +       case TRIGGER_NETDEV_FULL_DUPLEX:
  79         case TRIGGER_NETDEV_TX:
  80         case TRIGGER_NETDEV_RX:
  81                 bit = attr;
  82 @@ -302,6 +316,8 @@ static ssize_t netdev_led_attr_store(str
  83         case TRIGGER_NETDEV_LINK_10:
  84         case TRIGGER_NETDEV_LINK_100:
  85         case TRIGGER_NETDEV_LINK_1000:
  86 +       case TRIGGER_NETDEV_HALF_DUPLEX:
  87 +       case TRIGGER_NETDEV_FULL_DUPLEX:
  88         case TRIGGER_NETDEV_TX:
  89         case TRIGGER_NETDEV_RX:
  90                 bit = attr;
  91 @@ -348,6 +364,8 @@ DEFINE_NETDEV_TRIGGER(link, TRIGGER_NETD
  92  DEFINE_NETDEV_TRIGGER(link_10, TRIGGER_NETDEV_LINK_10);
  93  DEFINE_NETDEV_TRIGGER(link_100, TRIGGER_NETDEV_LINK_100);
  94  DEFINE_NETDEV_TRIGGER(link_1000, TRIGGER_NETDEV_LINK_1000);
  95 +DEFINE_NETDEV_TRIGGER(half_duplex, TRIGGER_NETDEV_HALF_DUPLEX);
  96 +DEFINE_NETDEV_TRIGGER(full_duplex, TRIGGER_NETDEV_FULL_DUPLEX);
  97  DEFINE_NETDEV_TRIGGER(tx, TRIGGER_NETDEV_TX);
  98  DEFINE_NETDEV_TRIGGER(rx, TRIGGER_NETDEV_RX);
  99
 100 @@ -394,6 +412,8 @@ static struct attribute *netdev_trig_att
 101         &dev_attr_link_10.attr,
 102         &dev_attr_link_100.attr,
 103         &dev_attr_link_1000.attr,
 104 +       &dev_attr_full_duplex.attr,
 105 +       &dev_attr_half_duplex.attr,
 106         &dev_attr_rx.attr,
 107         &dev_attr_tx.attr,
 108         &dev_attr_interval.attr,
 109 @@ -425,6 +445,7 @@ static int netdev_trig_notify(struct not
 110
 111         trigger_data->carrier_link_up = false;
 112         trigger_data->link_speed = SPEED_UNKNOWN;
 113 +       trigger_data->duplex = DUPLEX_UNKNOWN;
 114         switch (evt) {
 115         case NETDEV_CHANGENAME:
 116                 get_device_state(trigger_data);
 117 @@ -487,7 +508,9 @@ static void netdev_trig_work(struct work
 118                 invert = test_bit(TRIGGER_NETDEV_LINK, &trigger_data->mode) ||
 119                          test_bit(TRIGGER_NETDEV_LINK_10, &trigger_data->mode) ||
 120                          test_bit(TRIGGER_NETDEV_LINK_100, &trigger_data->mode) ||
 121 -                        test_bit(TRIGGER_NETDEV_LINK_1000, &trigger_data->mode);
 122 +                        test_bit(TRIGGER_NETDEV_LINK_1000, &trigger_data->mode) ||
 123 +                        test_bit(TRIGGER_NETDEV_HALF_DUPLEX, &trigger_data->mode) ||
 124 +                        test_bit(TRIGGER_NETDEV_FULL_DUPLEX, &trigger_data->mode);
 125                 interval = jiffies_to_msecs(
 126                                 atomic_read(&trigger_data->interval));
 127                 /* base state is ON (link present) */
 128 --- a/include/linux/leds.h
 129 +++ b/include/linux/leds.h
 130 @@ -533,6 +533,8 @@ enum led_trigger_netdev_modes {
 131         TRIGGER_NETDEV_LINK_10,
 132         TRIGGER_NETDEV_LINK_100,
 133         TRIGGER_NETDEV_LINK_1000,
 134 +       TRIGGER_NETDEV_HALF_DUPLEX,
 135 +       TRIGGER_NETDEV_FULL_DUPLEX,
 136         TRIGGER_NETDEV_TX,
 137         TRIGGER_NETDEV_RX,
 138