Add support for LEDs on i225/i226. The LEDs can be controlled via sysfs from user space using the netdev trigger. The LEDs are named as igc-<bus><device>-<led> to be easily identified.
Offloading link speed is supported. Other modes are simulated in software by using on/off. Tested on Intel i225. Signed-off-by: Kurt Kanzenbach <k...@linutronix.de> --- Changes since v1: * Add brightness_set() to allow software control (Andrew) * Remove offloading of activity, because the software control is more flexible * Fix smatch warning (Simon) Previous versions: * v1: https://lore.kernel.org/netdev/20240124082408.49138-1-k...@linutronix.de/ drivers/net/ethernet/intel/Kconfig | 8 + drivers/net/ethernet/intel/igc/Makefile | 1 + drivers/net/ethernet/intel/igc/igc.h | 5 + drivers/net/ethernet/intel/igc/igc_leds.c | 252 ++++++++++++++++++++++ drivers/net/ethernet/intel/igc/igc_main.c | 6 + drivers/net/ethernet/intel/igc/igc_regs.h | 1 + 6 files changed, 273 insertions(+) create mode 100644 drivers/net/ethernet/intel/igc/igc_leds.c diff --git a/drivers/net/ethernet/intel/Kconfig b/drivers/net/ethernet/intel/Kconfig index d55638ad8704..767358b60507 100644 --- a/drivers/net/ethernet/intel/Kconfig +++ b/drivers/net/ethernet/intel/Kconfig @@ -368,6 +368,14 @@ config IGC To compile this driver as a module, choose M here. The module will be called igc. + +config IGC_LEDS + def_bool LEDS_TRIGGER_NETDEV + depends on IGC && LEDS_CLASS + help + Optional support for controlling the NIC LED's with the netdev + LED trigger. + config IDPF tristate "Intel(R) Infrastructure Data Path Function Support" depends on PCI_MSI diff --git a/drivers/net/ethernet/intel/igc/Makefile b/drivers/net/ethernet/intel/igc/Makefile index 95d1e8c490a4..ebffd3054285 100644 --- a/drivers/net/ethernet/intel/igc/Makefile +++ b/drivers/net/ethernet/intel/igc/Makefile @@ -6,6 +6,7 @@ # obj-$(CONFIG_IGC) += igc.o +igc-$(CONFIG_IGC_LEDS) += igc_leds.o igc-objs := igc_main.o igc_mac.o igc_i225.o igc_base.o igc_nvm.o igc_phy.o \ igc_diag.o igc_ethtool.o igc_ptp.o igc_dump.o igc_tsn.o igc_xdp.o diff --git a/drivers/net/ethernet/intel/igc/igc.h b/drivers/net/ethernet/intel/igc/igc.h index 75f7c5ba65e0..a8815e3b2949 100644 --- a/drivers/net/ethernet/intel/igc/igc.h +++ b/drivers/net/ethernet/intel/igc/igc.h @@ -295,6 +295,9 @@ struct igc_adapter { struct timespec64 start; struct timespec64 period; } perout[IGC_N_PEROUT]; + + /* LEDs */ + struct mutex led_mutex; }; void igc_up(struct igc_adapter *adapter); @@ -720,6 +723,8 @@ void igc_ptp_tx_hang(struct igc_adapter *adapter); void igc_ptp_read(struct igc_adapter *adapter, struct timespec64 *ts); void igc_ptp_tx_tstamp_event(struct igc_adapter *adapter); +int igc_led_setup(struct igc_adapter *adapter); + #define igc_rx_pg_size(_ring) (PAGE_SIZE << igc_rx_pg_order(_ring)) #define IGC_TXD_DCMD (IGC_ADVTXD_DCMD_EOP | IGC_ADVTXD_DCMD_RS) diff --git a/drivers/net/ethernet/intel/igc/igc_leds.c b/drivers/net/ethernet/intel/igc/igc_leds.c new file mode 100644 index 000000000000..7a2397826cad --- /dev/null +++ b/drivers/net/ethernet/intel/igc/igc_leds.c @@ -0,0 +1,252 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (C) 2024 Linutronix GmbH */ + +#include <linux/bits.h> +#include <linux/leds.h> +#include <linux/netdevice.h> +#include <linux/pm_runtime.h> +#include <uapi/linux/uleds.h> + +#include "igc.h" + +#define IGC_NUM_LEDS 3 + +#define IGC_LEDCTL_LED0_MODE_SHIFT 0 +#define IGC_LEDCTL_LED0_MODE_MASK GENMASK(3, 0) +#define IGC_LEDCTL_LED0_BLINK BIT(7) +#define IGC_LEDCTL_LED1_MODE_SHIFT 8 +#define IGC_LEDCTL_LED1_MODE_MASK GENMASK(11, 8) +#define IGC_LEDCTL_LED1_BLINK BIT(15) +#define IGC_LEDCTL_LED2_MODE_SHIFT 16 +#define IGC_LEDCTL_LED2_MODE_MASK GENMASK(19, 16) +#define IGC_LEDCTL_LED2_BLINK BIT(23) + +#define IGC_LEDCTL_MODE_ON 0x00 +#define IGC_LEDCTL_MODE_OFF 0x01 +#define IGC_LEDCTL_MODE_LINK_10 0x05 +#define IGC_LEDCTL_MODE_LINK_100 0x06 +#define IGC_LEDCTL_MODE_LINK_1000 0x07 +#define IGC_LEDCTL_MODE_LINK_2500 0x08 + +#define IGC_SUPPORTED_MODES \ + (BIT(TRIGGER_NETDEV_LINK_2500) | BIT(TRIGGER_NETDEV_LINK_1000) | \ + BIT(TRIGGER_NETDEV_LINK_100) | BIT(TRIGGER_NETDEV_LINK_10)) + +struct igc_led_classdev { + struct net_device *netdev; + struct led_classdev led; + int index; +}; + +#define lcdev_to_igc_ldev(lcdev) \ + container_of(lcdev, struct igc_led_classdev, led) + +static void igc_led_select(struct igc_adapter *adapter, int led, + u32 *mask, u32 *shift, u32 *blink) +{ + switch (led) { + case 0: + *mask = IGC_LEDCTL_LED0_MODE_MASK; + *shift = IGC_LEDCTL_LED0_MODE_SHIFT; + *blink = IGC_LEDCTL_LED0_BLINK; + break; + case 1: + *mask = IGC_LEDCTL_LED1_MODE_MASK; + *shift = IGC_LEDCTL_LED1_MODE_SHIFT; + *blink = IGC_LEDCTL_LED1_BLINK; + break; + case 2: + *mask = IGC_LEDCTL_LED2_MODE_MASK; + *shift = IGC_LEDCTL_LED2_MODE_SHIFT; + *blink = IGC_LEDCTL_LED2_BLINK; + break; + default: + *mask = *shift = *blink = 0; + netdev_err(adapter->netdev, "Unknown LED %d selected!\n", led); + } +} + +static void igc_led_set(struct igc_adapter *adapter, int led, u32 mode, + bool blink) +{ + u32 shift, mask, blink_bit, ledctl; + struct igc_hw *hw = &adapter->hw; + + igc_led_select(adapter, led, &mask, &shift, &blink_bit); + + pm_runtime_get_sync(&adapter->pdev->dev); + mutex_lock(&adapter->led_mutex); + + /* Set mode */ + ledctl = rd32(IGC_LEDCTL); + ledctl &= ~mask; + ledctl |= mode << shift; + + /* Configure blinking */ + if (blink) + ledctl |= blink_bit; + else + ledctl &= ~blink_bit; + wr32(IGC_LEDCTL, ledctl); + + mutex_unlock(&adapter->led_mutex); + pm_runtime_put(&adapter->pdev->dev); +} + +static u32 igc_led_get(struct igc_adapter *adapter, int led) +{ + u32 shift, mask, blink_bit, ledctl; + struct igc_hw *hw = &adapter->hw; + + igc_led_select(adapter, led, &mask, &shift, &blink_bit); + + pm_runtime_get_sync(&adapter->pdev->dev); + mutex_lock(&adapter->led_mutex); + ledctl = rd32(IGC_LEDCTL); + mutex_unlock(&adapter->led_mutex); + pm_runtime_put(&adapter->pdev->dev); + + return (ledctl & mask) >> shift; +} + +static int igc_led_brightness_set_blocking(struct led_classdev *led_cdev, + enum led_brightness brightness) +{ + struct igc_led_classdev *ldev = lcdev_to_igc_ldev(led_cdev); + struct igc_adapter *adapter = netdev_priv(ldev->netdev); + u32 mode; + + if (brightness) + mode = IGC_LEDCTL_MODE_ON; + else + mode = IGC_LEDCTL_MODE_OFF; + + netdev_dbg(adapter->netdev, "Set brightness for LED %d to mode %u!\n", + ldev->index, mode); + + igc_led_set(adapter, ldev->index, mode, false); + + return 0; +} + +static int igc_led_hw_control_is_supported(struct led_classdev *led_cdev, + unsigned long flags) +{ + if (flags & ~IGC_SUPPORTED_MODES) + return -EOPNOTSUPP; + + /* Only one mode can be active at a time */ + if (flags & (flags - 1)) + return -EOPNOTSUPP; + + return 0; +} + +static int igc_led_hw_control_set(struct led_classdev *led_cdev, + unsigned long flags) +{ + struct igc_led_classdev *ldev = lcdev_to_igc_ldev(led_cdev); + struct igc_adapter *adapter = netdev_priv(ldev->netdev); + u32 mode = IGC_LEDCTL_MODE_OFF; + + if (flags & BIT(TRIGGER_NETDEV_LINK_10)) + mode = IGC_LEDCTL_MODE_LINK_10; + if (flags & BIT(TRIGGER_NETDEV_LINK_100)) + mode = IGC_LEDCTL_MODE_LINK_100; + if (flags & BIT(TRIGGER_NETDEV_LINK_1000)) + mode = IGC_LEDCTL_MODE_LINK_1000; + if (flags & BIT(TRIGGER_NETDEV_LINK_2500)) + mode = IGC_LEDCTL_MODE_LINK_2500; + + netdev_dbg(adapter->netdev, "Set HW control for LED %d to mode %u!\n", + ldev->index, mode); + + igc_led_set(adapter, ldev->index, mode, false); + + return 0; +} + +static int igc_led_hw_control_get(struct led_classdev *led_cdev, + unsigned long *flags) +{ + struct igc_led_classdev *ldev = lcdev_to_igc_ldev(led_cdev); + struct igc_adapter *adapter = netdev_priv(ldev->netdev); + u32 mode; + + mode = igc_led_get(adapter, ldev->index); + + switch (mode) { + case IGC_LEDCTL_MODE_LINK_10: + *flags = BIT(TRIGGER_NETDEV_LINK_10); + break; + case IGC_LEDCTL_MODE_LINK_100: + *flags = BIT(TRIGGER_NETDEV_LINK_100); + break; + case IGC_LEDCTL_MODE_LINK_1000: + *flags = BIT(TRIGGER_NETDEV_LINK_1000); + break; + case IGC_LEDCTL_MODE_LINK_2500: + *flags = BIT(TRIGGER_NETDEV_LINK_2500); + break; + } + + return 0; +} + +static struct device *igc_led_hw_control_get_device(struct led_classdev *led_cdev) +{ + struct igc_led_classdev *ldev = lcdev_to_igc_ldev(led_cdev); + + return &ldev->netdev->dev; +} + +static void igc_led_get_name(struct igc_adapter *adapter, int index, char *buf, + size_t buf_len) +{ + snprintf(buf, buf_len, "igc-%x%x-led%d", + pci_domain_nr(adapter->pdev->bus), + pci_dev_id(adapter->pdev), index); +} + +static void igc_setup_ldev(struct igc_led_classdev *ldev, + struct net_device *netdev, int index) +{ + struct igc_adapter *adapter = netdev_priv(netdev); + struct led_classdev *led_cdev = &ldev->led; + char led_name[LED_MAX_NAME_SIZE]; + + ldev->netdev = netdev; + ldev->index = index; + + igc_led_get_name(adapter, index, led_name, LED_MAX_NAME_SIZE); + led_cdev->name = led_name; + led_cdev->flags |= LED_RETAIN_AT_SHUTDOWN; + led_cdev->max_brightness = 1; + led_cdev->brightness_set_blocking = igc_led_brightness_set_blocking; + led_cdev->hw_control_trigger = "netdev"; + led_cdev->hw_control_is_supported = igc_led_hw_control_is_supported; + led_cdev->hw_control_set = igc_led_hw_control_set; + led_cdev->hw_control_get = igc_led_hw_control_get; + led_cdev->hw_control_get_device = igc_led_hw_control_get_device; + + devm_led_classdev_register(&netdev->dev, led_cdev); +} + +int igc_led_setup(struct igc_adapter *adapter) +{ + struct net_device *netdev = adapter->netdev; + struct device *dev = &netdev->dev; + struct igc_led_classdev *leds; + int i; + + mutex_init(&adapter->led_mutex); + + leds = devm_kcalloc(dev, IGC_NUM_LEDS, sizeof(*leds), GFP_KERNEL); + if (!leds) + return -ENOMEM; + + for (i = 0; i < IGC_NUM_LEDS; i++) + igc_setup_ldev(leds + i, netdev, i); + + return 0; +} diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c index ba8d3fe186ae..5ee26def75a7 100644 --- a/drivers/net/ethernet/intel/igc/igc_main.c +++ b/drivers/net/ethernet/intel/igc/igc_main.c @@ -6977,6 +6977,12 @@ static int igc_probe(struct pci_dev *pdev, pm_runtime_put_noidle(&pdev->dev); + if (IS_ENABLED(CONFIG_IGC_LEDS)) { + err = igc_led_setup(adapter); + if (err) + goto err_register; + } + return 0; err_register: diff --git a/drivers/net/ethernet/intel/igc/igc_regs.h b/drivers/net/ethernet/intel/igc/igc_regs.h index d38c87d7e5e8..e5b893fc5b66 100644 --- a/drivers/net/ethernet/intel/igc/igc_regs.h +++ b/drivers/net/ethernet/intel/igc/igc_regs.h @@ -12,6 +12,7 @@ #define IGC_MDIC 0x00020 /* MDI Control - RW */ #define IGC_CONNSW 0x00034 /* Copper/Fiber switch control - RW */ #define IGC_VET 0x00038 /* VLAN Ether Type - RW */ +#define IGC_LEDCTL 0x00E00 /* LED Control - RW */ #define IGC_I225_PHPM 0x00E14 /* I225 PHY Power Management */ #define IGC_GPHY_VERSION 0x0001E /* I225 gPHY Firmware Version */ -- 2.39.2
