On Tue, 6 Aug 2024, Luke D. Jones wrote:
> The fw_attributes_class provides a much cleaner interface to all of the
> attributes introduced to asus-wmi. This patch moves all of these extra
> attributes over to fw_attributes_class, and shifts the bulk of these
> definitions to a new kernel module to reduce the clutter of asus-wmi
> with the intention of deprecating the asus-wmi attributes in future.
>
> The work applies only to WMI methods which don't have a clearly defined
> place within the sysfs and as a result ended up lumped together in
> /sys/devices/platform/asus-nb-wmi/ with no standard API.
>
> Where possible the fw attrs now implement defaults, min, max, scalar,
> choices, etc. As en example dgpu_disable becomes:
>
> /sys/class/firmware-attributes/asus-armoury/attributes/dgpu_disable/
> ├── current_value
> ├── display_name
> ├── possible_values
> └── type
>
> as do other attributes.
>
> Signed-off-by: Luke D. Jones <luke@xxxxxxxxxx>
> ---
> drivers/platform/x86/Kconfig | 14 +
> drivers/platform/x86/Makefile | 1 +
> drivers/platform/x86/asus-armoury.c | 706 +++++++++++++++++++++
> drivers/platform/x86/asus-armoury.h | 195 ++++++
> drivers/platform/x86/asus-wmi.c | 48 +-
> include/linux/platform_data/x86/asus-wmi.h | 11 +
> 6 files changed, 973 insertions(+), 2 deletions(-)
> create mode 100644 drivers/platform/x86/asus-armoury.c
> create mode 100644 drivers/platform/x86/asus-armoury.h
>
> diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
> index 665fa9524986..8ecc73ef2670 100644
> --- a/drivers/platform/x86/Kconfig
> +++ b/drivers/platform/x86/Kconfig
> @@ -265,6 +265,19 @@ config ASUS_WIRELESS
> If you choose to compile this driver as a module the module will be
> called asus-wireless.
>
> +config ASUS_ARMOURY
> + tristate "ASUS Armoury (firmware) Driver"
> + depends on ACPI_WMI
> + depends on ASUS_WMI
> + select FW_ATTR_CLASS
> + help
> + Say Y here if you have a WMI aware Asus laptop and would like to use the
> + firmware_attributes API to control various settings typically exposed in
> + the ASUS Armoury Crate application available on Windows.
> +
> + To compile this driver as a module, choose M here: the module will
> + be called asus-armoury.
> +
> config ASUS_WMI
> tristate "ASUS WMI Driver"
> depends on ACPI_WMI
> @@ -276,6 +289,7 @@ config ASUS_WMI
> depends on HOTPLUG_PCI
> depends on ACPI_VIDEO || ACPI_VIDEO = n
> depends on SERIO_I8042 || SERIO_I8042 = n
> + select ASUS_ARMOURY
> select INPUT_SPARSEKMAP
> select LEDS_CLASS
> select NEW_LEDS
> diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile
> index e1b142947067..fe3e7e7dede8 100644
> --- a/drivers/platform/x86/Makefile
> +++ b/drivers/platform/x86/Makefile
> @@ -32,6 +32,7 @@ obj-$(CONFIG_APPLE_GMUX) += apple-gmux.o
> # ASUS
> obj-$(CONFIG_ASUS_LAPTOP) += asus-laptop.o
> obj-$(CONFIG_ASUS_WIRELESS) += asus-wireless.o
> +obj-$(CONFIG_ASUS_ARMOURY) += asus-armoury.o
> obj-$(CONFIG_ASUS_WMI) += asus-wmi.o
> obj-$(CONFIG_ASUS_NB_WMI) += asus-nb-wmi.o
> obj-$(CONFIG_ASUS_TF103C_DOCK) += asus-tf103c-dock.o
> diff --git a/drivers/platform/x86/asus-armoury.c b/drivers/platform/x86/asus-armoury.c
> new file mode 100644
> index 000000000000..bb049ead00f9
> --- /dev/null
> +++ b/drivers/platform/x86/asus-armoury.c
> @@ -0,0 +1,706 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later
> +/*
> + * Asus Armoury (WMI) attributes driver. This driver uses the fw_attributes
> + * class to expose the various WMI functions that many gaming and some
> + * non-gaming ASUS laptops have available.
> + * These typically don't fit anywhere else in the sysfs such as under LED class,
> + * hwmon or other, and are set in Windows using the ASUS Armoury Crate tool.
> + *
> + * Copyright(C) 2010 Intel Corporation.
> + * Copyright(C) 2024-2024 Luke Jones <luke@xxxxxxxxxx>
> + */
> +
> +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
> +
> +#include <linux/platform_data/x86/asus-wmi.h>
> +#include <linux/errno.h>
> +#include <linux/fs.h>
> +#include <linux/types.h>
> +#include <linux/dmi.h>
> +#include <linux/device.h>
> +#include <linux/kmod.h>
> +#include <linux/kobject.h>
> +#include <linux/module.h>
> +#include <linux/mutex.h>
> +#include <linux/kernel.h>
> +#include "asus-armoury.h"
> +#include "firmware_attributes_class.h"
> +
> +#define ASUS_NB_WMI_EVENT_GUID "0B3CBB35-E3C2-45ED-91C2-4C5A6D195D1C"
> +
> +#define ASUS_MINI_LED_MODE_MASK 0x03
> +/* Standard modes for devices with only on/off */
> +#define ASUS_MINI_LED_OFF 0x00
> +#define ASUS_MINI_LED_ON 0x01
> +/* New mode on some devices, define here to clarify remapping later */
> +#define ASUS_MINI_LED_STRONG_MODE 0x02
> +/* New modes for devices with 3 mini-led mode types */
> +#define ASUS_MINI_LED_2024_WEAK 0x00
> +#define ASUS_MINI_LED_2024_STRONG 0x01
> +#define ASUS_MINI_LED_2024_OFF 0x02
> +
> +/* Default limits for tunables available on ASUS ROG laptops */
> +#define PPT_CPU_LIMIT_MIN 5
> +#define PPT_CPU_LIMIT_MAX 150
> +#define PPT_CPU_LIMIT_DEFAULT 80
> +#define PPT_PLATFORM_MIN 5
> +#define PPT_PLATFORM_MAX 100
> +#define PPT_PLATFORM_DEFAULT 80
> +#define NVIDIA_BOOST_MIN 5
> +#define NVIDIA_BOOST_MAX 25
> +#define NVIDIA_TEMP_MIN 75
> +#define NVIDIA_TEMP_MAX 87
> +
> +/* Tunables provided by ASUS for gaming laptops */
> +struct rog_tunables {
> + u32 cpu_default;
> + u32 cpu_min;
> + u32 cpu_max;
> +
> + u32 platform_default;
> + u32 platform_min;
> + u32 platform_max;
> +
> + u32 ppt_pl1_spl; // cpu
> + u32 ppt_pl2_sppt; // cpu
> + u32 ppt_apu_sppt; // plat
> + u32 ppt_platform_sppt; // plat
> + u32 ppt_fppt; // cpu
> +
> + u32 nv_boost_default;
> + u32 nv_boost_min;
> + u32 nv_boost_max;
> + u32 nv_dynamic_boost;
> +
> + u32 nv_temp_default;
> + u32 nv_temp_min;
> + u32 nv_temp_max;
> + u32 nv_temp_target;
> +};
> +
> +static const struct class *fw_attr_class;
> +
> +struct asus_armoury_priv {
> + struct device *fw_attr_dev;
> + struct kset *fw_attr_kset;
> +
> + struct rog_tunables *rog_tunables;
> + u32 mini_led_dev_id;
> + u32 gpu_mux_dev_id;
> +
> + struct mutex mutex;
> +};
> +
> +static struct asus_armoury_priv asus_armoury = { .mutex = __MUTEX_INITIALIZER(
> + asus_armoury.mutex) };
Please put the mutex member on own line.
> +
> +struct fw_attrs_group {
> + u32 pending_reboot;
> +};
> +
> +static struct fw_attrs_group fw_attrs = {
> + .pending_reboot = 0,
> +};
> +
> +struct asus_attr_group {
> + const struct attribute_group *attr_group;
> + u32 wmi_devid;
> +};
> +
> +/**
> + * asus_wmi_is_present() - determine if a WMI interface is available.
> + * @dev_id: The WMI function ID to use.
> + *
> + * Returns: Boolean state. Note that an error will also return false.
> + */
> +static bool asus_wmi_is_present(u32 dev_id)
> +{
> + u32 retval;
> + int status;
> +
> + status = asus_wmi_get_devstate_dsts(dev_id, &retval);
> + pr_debug("%s called (0x%08x), retval: 0x%08x\n", __func__, dev_id, retval);
> +
> + return status == 0 && (retval & ASUS_WMI_DSTS_PRESENCE_BIT);
> +}
> +
> +static void asus_set_reboot_and_signal_event(void)
> +{
> + fw_attrs.pending_reboot = 1;
> + kobject_uevent(&asus_armoury.fw_attr_dev->kobj, KOBJ_CHANGE);
> +}
> +
> +static ssize_t pending_reboot_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
> +{
> + return sysfs_emit(buf, "%u\n", fw_attrs.pending_reboot);
> +}
> +
> +static struct kobj_attribute pending_reboot = __ATTR_RO(pending_reboot);
> +
> +static bool asus_bios_requires_reboot(struct kobj_attribute *attr)
> +{
> + return !strcmp(attr->attr.name, "gpu_mux_mode") ||
> + !strcmp(attr->attr.name, "panel_hd_mode");
> +}
> +
> +/**
> + * attr_int_store() - Generic store function for use with most WMI functions.
> + * @kobj: Pointer to the driver object.
> + * @kobj_attribute: Pointer the attribute calling this function.
> + * @buf: The buffer to read from, this is parsed to `int` type.
> + * @count:
> + * @min: Minimum accepted value. Below this returns -EINVAL.
> + * @max: Maximum accepted value. Above this returns -EINVAL.
> + * @store_value: Pointer to where the parsed value should be stored.
> + * @wmi_dev: The WMI function ID to use.
> + *
> + * The WMI functions available on most ASUS laptops return a 1 as "success", and
> + * a 0 as failed. However some functions can return n > 1 for additional errors.
> + * attr_int_store() currently treats all values which are not 1 as errors, ignoring
> + * the possible differences in WMI error returns.
> + *
> + * Returns: Either count, or an error.
> + */
> +static ssize_t attr_int_store(struct kobject *kobj, struct kobj_attribute *attr,
> + const char *buf, size_t count, u32 min, u32 max, u32 *store_value,
> + u32 wmi_dev)
> +{
> + u32 result, value;
> + int err;
> +
> + err = kstrtouint(buf, 10, &value);
> + if (err)
> + return err;
> +
> + if (value < min || value > max)
> + return -EINVAL;
> +
> + err = asus_wmi_set_devstate(wmi_dev, value, &result);
> + if (err) {
> + pr_err("Failed to set %s: %d\n", attr->attr.name, err);
> + return err;
> + }
> +
> + if (result != 1) {
> + pr_err("Failed to set %s (result): 0x%x\n", attr->attr.name, result);
> + return -EIO;
> + }
> +
> + if (store_value != NULL)
> + *store_value = value;
> + sysfs_notify(kobj, NULL, attr->attr.name);
> +
> + if (asus_bios_requires_reboot(attr))
> + asus_set_reboot_and_signal_event();
> +
> + return count;
> +}
> +
> +/* Mini-LED mode **************************************************************/
> +static ssize_t mini_led_mode_current_value_show(struct kobject *kobj,
> + struct kobj_attribute *attr, char *buf)
> +{
> + u32 value;
> + int err;
> +
> + err = asus_wmi_get_devstate_dsts(asus_armoury.mini_led_dev_id, &value);
> + if (err)
> + return err;
> +
> + value = value & ASUS_MINI_LED_MODE_MASK;
value &= ASUS_MINI_LED_MODE_MASK;
> +
> + /*
> + * Remap the mode values to match previous generation mini-led. The last gen
LED
> + * WMI 0 == off, while on this version WMI 2 ==off (flipped).
inconsistent spaces.
> + */
> + if (asus_armoury.mini_led_dev_id == ASUS_WMI_DEVID_MINI_LED_MODE2) {
> + switch (value) {
> + case ASUS_MINI_LED_2024_WEAK:
> + value = ASUS_MINI_LED_ON;
> + break;
> + case ASUS_MINI_LED_2024_STRONG:
> + value = ASUS_MINI_LED_STRONG_MODE;
> + break;
> + case ASUS_MINI_LED_2024_OFF:
> + value = ASUS_MINI_LED_OFF;
> + break;
> + }
> + }
> +
> + return sysfs_emit(buf, "%u\n", value);
> +}
> +
> +static ssize_t mini_led_mode_current_value_store(struct kobject *kobj,
> + struct kobj_attribute *attr, const char *buf,
> + size_t count)
> +{
> + int result, err;
> + u32 mode;
> +
> + err = kstrtou32(buf, 10, &mode);
> + if (err)
> + return err;
> +
> + if (asus_armoury.mini_led_dev_id == ASUS_WMI_DEVID_MINI_LED_MODE &&
> + mode > ASUS_MINI_LED_ON)
> + return -EINVAL;
> + if (asus_armoury.mini_led_dev_id == ASUS_WMI_DEVID_MINI_LED_MODE2 &&
> + mode > ASUS_MINI_LED_STRONG_MODE)
> + return -EINVAL;
> +
> + /*
> + * Remap the mode values so expected behaviour is the same as the last
> + * generation of mini-LED with 0 == off, 1 == on.
> + */
> + if (asus_armoury.mini_led_dev_id == ASUS_WMI_DEVID_MINI_LED_MODE2) {
> + switch (mode) {
> + case ASUS_MINI_LED_OFF:
> + mode = ASUS_MINI_LED_2024_OFF;
> + break;
> + case ASUS_MINI_LED_ON:
> + mode = ASUS_MINI_LED_2024_WEAK;
> + break;
> + case ASUS_MINI_LED_STRONG_MODE:
> + mode = ASUS_MINI_LED_2024_STRONG;
> + break;
> + }
> + }
> +
> + err = asus_wmi_set_devstate(asus_armoury.mini_led_dev_id, mode, &result);
> + if (err) {
> + pr_warn("Failed to set mini-LED: %d\n", err);
> + return err;
> + }
> +
> + if (result != 1) {
> + pr_warn("Failed to set mini-LED mode (result): 0x%x\n", result);
> + return -EIO;
> + }
> +
> + sysfs_notify(kobj, NULL, attr->attr.name);
> +
> + return count;
> +}
> +
> +static ssize_t mini_led_mode_possible_values_show(struct kobject *kobj,
> + struct kobj_attribute *attr, char *buf)
> +{
> + switch (asus_armoury.mini_led_dev_id) {
> + case ASUS_WMI_DEVID_MINI_LED_MODE:
> + return sysfs_emit(buf, "0;1\n");
> + case ASUS_WMI_DEVID_MINI_LED_MODE2:
> + return sysfs_emit(buf, "0;1;2\n");
> + }
> +
> + return sysfs_emit(buf, "0\n");
> +}
> +
> +ATTR_GROUP_ENUM_CUSTOM(mini_led_mode, "mini_led_mode", "Set the mini-LED backlight mode");
> +
> +static ssize_t gpu_mux_mode_current_value_store(struct kobject *kobj,
> + struct kobj_attribute *attr, const char *buf,
> + size_t count)
> +{
> + int result, err;
> + u32 optimus;
> +
> + err = kstrtou32(buf, 10, &optimus);
> + if (err)
> + return err;
> +
> + if (optimus > 1)
> + return -EINVAL;
> +
> + if (asus_wmi_is_present(ASUS_WMI_DEVID_DGPU)) {
> + err = asus_wmi_get_devstate_dsts(ASUS_WMI_DEVID_DGPU, &result);
> + if (err)
> + return err;
> + if (result && !optimus) {
> + err = -ENODEV;
> + pr_warn("Can not switch MUX to dGPU mode when dGPU is disabled: %d\n",
> + err);
> + return err;
> + }
> + }
> +
> + if (asus_wmi_is_present(ASUS_WMI_DEVID_EGPU)) {
> + err = asus_wmi_get_devstate_dsts(ASUS_WMI_DEVID_EGPU, &result);
> + if (err)
> + return err;
> + if (result && !optimus) {
> + err = -ENODEV;
> + pr_warn("Can not switch MUX to dGPU mode when eGPU is enabled: %d\n",
> + err);
> + return err;
> + }
> + }
> +
> + err = asus_wmi_set_devstate(asus_armoury.gpu_mux_dev_id, optimus, &result);
> + if (err) {
> + pr_err("Failed to set GPU MUX mode: %d\nn", err);
Double n at the end of the string.
> + return err;
> + }
> + /* !1 is considered a fail by ASUS */
> + if (result != 1) {
> + pr_warn("Failed to set GPU MUX mode (result): 0x%x\n", result);
> + return -EIO;
> + }
> +
> + sysfs_notify(kobj, NULL, attr->attr.name);
> +
> + return count;
> +}
> +WMI_SHOW_INT(gpu_mux_mode_current_value, "%d\n", asus_armoury.gpu_mux_dev_id);
> +ATTR_GROUP_BOOL_CUSTOM(gpu_mux_mode, "gpu_mux_mode", "Set the GPU display MUX mode");
> +
> +/*
> + * A user may be required to store the value twice, typcial store first, then
typical
> + * rescan PCI bus to activate power, then store a second time to save correctly.
> + * The reason for this is that an extra code path in the ACPI is enabled when
> + * the device and bus are powered.
> + */
> +static ssize_t dgpu_disable_current_value_store(struct kobject *kobj,
> + struct kobj_attribute *attr, const char *buf,
> + size_t count)
> +{
> + int result, err;
> + u32 disable;
> +
> + err = kstrtou32(buf, 10, &disable);
> + if (err)
> + return err;
> +
> + if (disable > 1)
> + return -EINVAL;
> +
> + if (asus_armoury.gpu_mux_dev_id) {
> + err = asus_wmi_get_devstate_dsts(asus_armoury.gpu_mux_dev_id, &result);
> + if (err)
> + return err;
> + if (!result && disable) {
> + err = -ENODEV;
> + pr_warn("Can not disable dGPU when the MUX is in dGPU mode: %d\n", err);
> + return err;
> + }
> + }
> +
> + err = asus_wmi_set_devstate(ASUS_WMI_DEVID_DGPU, disable, &result);
> + if (err) {
> + pr_warn("Failed to set dgpu disable: %d\n", err);
> + return err;
> + }
> +
> + if (result != 1) {
> + pr_warn("Failed to set dgpu disable (result): 0x%x\n", result);
> + return -EIO;
> + }
> +
> + sysfs_notify(kobj, NULL, attr->attr.name);
> +
> + return count;
> +}
> +WMI_SHOW_INT(dgpu_disable_current_value, "%d\n", ASUS_WMI_DEVID_DGPU);
> +ATTR_GROUP_BOOL_CUSTOM(dgpu_disable, "dgpu_disable", "Disable the dGPU");
> +
> +/* The ACPI call to enable the eGPU also disables the internal dGPU */
> +static ssize_t egpu_enable_current_value_store(struct kobject *kobj,
> + struct kobj_attribute *attr, const char *buf,
> + size_t count)
> +{
> + int result, err;
> + u32 enable;
> +
> + err = kstrtou32(buf, 10, &enable);
> + if (err)
> + return err;
> +
> + if (enable > 1)
> + return -EINVAL;
> +
> + err = asus_wmi_get_devstate_dsts(ASUS_WMI_DEVID_EGPU_CONNECTED, &result);
> + if (err) {
> + pr_warn("Failed to get egpu connection status: %d\n", err);
eGPU
> + return err;
> + }
> +
> + if (asus_armoury.gpu_mux_dev_id) {
> + err = asus_wmi_get_devstate_dsts(asus_armoury.gpu_mux_dev_id, &result);
> + if (err) {
> + pr_warn("Failed to get gpu mux status: %d\n", result);
GPU MUX
> + return result;
> + }
> + if (!result && enable) {
> + err = -ENODEV;
> + pr_warn("Can not enable eGPU when the MUX is in dGPU mode: %d\n", err);
> + return err;
> + }
> + }
> +
> + err = asus_wmi_set_devstate(ASUS_WMI_DEVID_EGPU, enable, &result);
> + if (err) {
> + pr_warn("Failed to set egpu state: %d\n", err);
eGPU
> + return err;
> + }
> +
> + if (result != 1) {
> + pr_warn("Failed to set egpu state (retval): 0x%x\n", result);
eGPU
> + return -EIO;
> + }
> +
> + sysfs_notify(kobj, NULL, attr->attr.name);
> +
> + return count;
> +}
> +WMI_SHOW_INT(egpu_enable_current_value, "%d\n", ASUS_WMI_DEVID_EGPU);
> +ATTR_GROUP_BOOL_CUSTOM(egpu_enable, "egpu_enable", "Enable the eGPU (also disables dGPU)");
> +
> +/* Simple attribute creation */
> +ATTR_GROUP_ROG_TUNABLE(ppt_pl1_spl, "ppt_pl1_spl", ASUS_WMI_DEVID_PPT_PL1_SPL, cpu_default,
> + cpu_min, cpu_max, 1, "Set the CPU slow package limit");
> +ATTR_GROUP_ROG_TUNABLE(ppt_pl2_sppt, "ppt_pl2_sppt", ASUS_WMI_DEVID_PPT_PL2_SPPT, cpu_default,
> + cpu_min, cpu_max, 1, "Set the CPU fast package limit");
> +ATTR_GROUP_ROG_TUNABLE(ppt_apu_sppt, "ppt_apu_sppt", ASUS_WMI_DEVID_PPT_APU_SPPT,
> + platform_default, platform_min, platform_max, 1,
> + "Set the CPU slow package limit");
> +ATTR_GROUP_ROG_TUNABLE(ppt_platform_sppt, "ppt_platform_sppt", ASUS_WMI_DEVID_PPT_PLAT_SPPT,
> + platform_default, platform_min, platform_max, 1,
> + "Set the CPU slow package limit");
> +ATTR_GROUP_ROG_TUNABLE(ppt_fppt, "ppt_fppt", ASUS_WMI_DEVID_PPT_FPPT, cpu_default, cpu_min,
> + cpu_max, 1, "Set the CPU slow package limit");
> +
> +ATTR_GROUP_ROG_TUNABLE(nv_dynamic_boost, "nv_dynamic_boost", ASUS_WMI_DEVID_NV_DYN_BOOST,
> + nv_boost_default, nv_boost_min, nv_boost_max, 1,
> + "Set the Nvidia dynamic boost limit");
> +ATTR_GROUP_ROG_TUNABLE(nv_temp_target, "nv_temp_target", ASUS_WMI_DEVID_NV_THERM_TARGET,
> + nv_temp_default, nv_boost_min, nv_temp_max, 1,
> + "Set the Nvidia max thermal limit");
> +
> +ATTR_GROUP_ENUM_INT_RO(charge_mode, "charge_mode", ASUS_WMI_DEVID_CHARGE_MODE, "0;1;2",
> + "Show the current mode of charging");
> +ATTR_GROUP_BOOL_RW(boot_sound, "boot_sound", ASUS_WMI_DEVID_BOOT_SOUND,
> + "Set the boot POST sound");
> +ATTR_GROUP_BOOL_RW(mcu_powersave, "mcu_powersave", ASUS_WMI_DEVID_MCU_POWERSAVE,
> + "Set MCU powersaving mode");
> +ATTR_GROUP_BOOL_RW(panel_od, "panel_overdrive", ASUS_WMI_DEVID_PANEL_OD,
> + "Set the panel refresh overdrive");
> +ATTR_GROUP_BOOL_RW(panel_hd_mode, "panel_hd_mode", ASUS_WMI_DEVID_PANEL_HD,
> + "Set the panel HD mode to UHD<0> or FHD<1>");
> +ATTR_GROUP_BOOL_RO(egpu_connected, "egpu_connected", ASUS_WMI_DEVID_EGPU_CONNECTED,
> + "Show the eGPU connection status");
> +
> +/* If an attribute does not require any special case handling add it here */
> +static const struct asus_attr_group armoury_attr_groups[] = {
> + { &egpu_connected_attr_group, ASUS_WMI_DEVID_EGPU_CONNECTED },
> + { &egpu_enable_attr_group, ASUS_WMI_DEVID_EGPU },
> + { &dgpu_disable_attr_group, ASUS_WMI_DEVID_DGPU },
> +
> + { &ppt_pl1_spl_attr_group, ASUS_WMI_DEVID_PPT_PL1_SPL },
> + { &ppt_pl2_sppt_attr_group, ASUS_WMI_DEVID_PPT_PL2_SPPT },
> + { &ppt_apu_sppt_attr_group, ASUS_WMI_DEVID_PPT_APU_SPPT },
> + { &ppt_platform_sppt_attr_group, ASUS_WMI_DEVID_PPT_PLAT_SPPT },
> + { &ppt_fppt_attr_group, ASUS_WMI_DEVID_PPT_FPPT },
> + { &nv_dynamic_boost_attr_group, ASUS_WMI_DEVID_NV_DYN_BOOST },
> + { &nv_temp_target_attr_group, ASUS_WMI_DEVID_NV_THERM_TARGET },
> +
> + { &charge_mode_attr_group, ASUS_WMI_DEVID_CHARGE_MODE },
> + { &boot_sound_attr_group, ASUS_WMI_DEVID_BOOT_SOUND },
> + { &mcu_powersave_attr_group, ASUS_WMI_DEVID_MCU_POWERSAVE },
> + { &panel_od_attr_group, ASUS_WMI_DEVID_PANEL_OD },
> + { &panel_hd_mode_attr_group, ASUS_WMI_DEVID_PANEL_HD },
> +};
> +
> +static int asus_fw_attr_add(void)
> +{
> + int err;
> +
> + err = fw_attributes_class_get(&fw_attr_class);
> + if (err)
> + goto fail_class_created;
> +
> + asus_armoury.fw_attr_dev =
> + device_create(fw_attr_class, NULL, MKDEV(0, 0), NULL, "%s", DRIVER_NAME);
> +
> + if (IS_ERR(asus_armoury.fw_attr_dev)) {
> + err = PTR_ERR(asus_armoury.fw_attr_dev);
> + goto fail_class_created;
> + }
> +
> + asus_armoury.fw_attr_kset =
> + kset_create_and_add("attributes", NULL, &asus_armoury.fw_attr_dev->kobj);
> + if (!asus_armoury.fw_attr_dev) {
> + err = -ENOMEM;
> + pr_debug("Failed to create and add attributes\n");
> + goto err_destroy_classdev;
> + }
> +
> + err = sysfs_create_file(&asus_armoury.fw_attr_kset->kobj, &pending_reboot.attr);
> + if (err) {
> + pr_warn("Failed to create sysfs level attributes\n");
> + goto fail_class_created;
> + }
> +
> + err = 0;
> + asus_armoury.mini_led_dev_id = 0;
> + if (asus_wmi_is_present(ASUS_WMI_DEVID_MINI_LED_MODE)) {
> + asus_armoury.mini_led_dev_id = ASUS_WMI_DEVID_MINI_LED_MODE;
> + err = sysfs_create_group(&asus_armoury.fw_attr_kset->kobj,
> + &mini_led_mode_attr_group);
> + } else if (asus_wmi_is_present(ASUS_WMI_DEVID_MINI_LED_MODE2)) {
> + asus_armoury.mini_led_dev_id = ASUS_WMI_DEVID_MINI_LED_MODE2;
> + err = sysfs_create_group(&asus_armoury.fw_attr_kset->kobj,
> + &mini_led_mode_attr_group);
> + }
> + if (err)
> + pr_warn("Failed to create sysfs-group for mini_led\n");
> +
> + err = 0;
> + asus_armoury.gpu_mux_dev_id = 0;
> + if (asus_wmi_is_present(ASUS_WMI_DEVID_GPU_MUX)) {
> + asus_armoury.gpu_mux_dev_id = ASUS_WMI_DEVID_GPU_MUX;
> + err = sysfs_create_group(&asus_armoury.fw_attr_kset->kobj,
> + &gpu_mux_mode_attr_group);
> + } else if (asus_wmi_is_present(ASUS_WMI_DEVID_GPU_MUX_VIVO)) {
> + asus_armoury.gpu_mux_dev_id = ASUS_WMI_DEVID_GPU_MUX_VIVO;
> + err = sysfs_create_group(&asus_armoury.fw_attr_kset->kobj,
> + &gpu_mux_mode_attr_group);
> + }
> + if (err)
> + pr_warn("Failed to create sysfs-group for gpu_mux\n");
> +
> + for (int i = 0; i < ARRAY_SIZE(armoury_attr_groups); i++) {
> + if (!asus_wmi_is_present(armoury_attr_groups[i].wmi_devid))
> + continue;
> +
> + err = sysfs_create_group(&asus_armoury.fw_attr_kset->kobj,
> + armoury_attr_groups[i].attr_group);
> + if (err)
> + pr_warn("Failed to create sysfs-group for %s\n",
> + armoury_attr_groups[i].attr_group->name);
> + else
> + pr_debug("Created sysfs-group for %s\n",
> + armoury_attr_groups[i].attr_group->name);
> + }
> +
> + return 0;
> +
> +err_destroy_classdev:
> + device_destroy(fw_attr_class, MKDEV(0, 0));
> +
> +fail_class_created:
> + fw_attributes_class_put();
> + return err;
> +}
> +
> +/* Init / exit ****************************************************************/
> +
> +/* Set up the min/max and defaults for ROG tunables */
> +static void init_rog_tunables(struct rog_tunables *rog)
> +{
> + const char *product;
> + u32 max_boost = NVIDIA_BOOST_MAX;
> + u32 cpu_default = PPT_CPU_LIMIT_DEFAULT;
> + u32 cpu_max = PPT_CPU_LIMIT_MAX;
> + u32 platform_default = PPT_PLATFORM_DEFAULT;
> + u32 platform_max = PPT_PLATFORM_MAX;
> +
> + /*
> + * ASUS product_name contains everything required, e.g,
> + * "ROG Flow X16 GV601VV_GV601VV_00185149B"
> + */
> + product = dmi_get_system_info(DMI_PRODUCT_NAME);
> +
> + if (strstr(product, "GA402R")) {
> + cpu_default = 125;
> + } else if (strstr(product, "13QY")) {
> + cpu_max = 250;
> + } else if (strstr(product, "X13")) {
> + cpu_max = 75;
> + cpu_default = 50;
> + } else if (strstr(product, "RC71")) {
> + cpu_max = 50;
> + cpu_default = 30;
> + } else if (strstr(product, "G814") || strstr(product, "G614") ||
> + strstr(product, "G834") || strstr(product, "G634")) {
> + cpu_max = 175;
> + } else if (strstr(product, "GA402X") || strstr(product, "GA403") ||
> + strstr(product, "FA507N") || strstr(product, "FA507X") ||
> + strstr(product, "FA707N") || strstr(product, "FA707X")) {
> + cpu_max = 90;
> + }
> +
> + if (strstr(product, "GZ301ZE"))
> + max_boost = 5;
> + else if (strstr(product, "FX507ZC4"))
> + max_boost = 15;
> + else if (strstr(product, "GU605"))
> + max_boost = 20;
It would be nice if driver_data could be used to store per model
information rather than using if forests. It's a bit tricky to realize
with dmi_check_system() though, only because you've rog available on
global level, a callback could store info directly into rog fields but it
doesn't not feel very clean solution having to have a global variable.
> + /* ensure defaults for tunables */
> + rog->cpu_default = cpu_default;
> + rog->cpu_min = PPT_CPU_LIMIT_MIN;
> + rog->cpu_max = cpu_max;
> +
> + rog->platform_default = platform_default;
> + rog->platform_max = PPT_PLATFORM_MIN;
> + rog->platform_max = platform_max;
> +
> + rog->ppt_pl1_spl = cpu_default;
> + rog->ppt_pl2_sppt = cpu_default;
> + rog->ppt_apu_sppt = cpu_default;
> +
> + rog->ppt_platform_sppt = platform_default;
> + rog->ppt_fppt = platform_default;
> +
> + rog->nv_boost_default = NVIDIA_BOOST_MAX;
> + rog->nv_boost_max = NVIDIA_BOOST_MIN;
> + rog->nv_boost_max = max_boost;
> + rog->nv_dynamic_boost = NVIDIA_BOOST_MIN;
> +
> + rog->nv_temp_default = NVIDIA_TEMP_MAX;
> + rog->nv_temp_max = NVIDIA_TEMP_MIN;
> + rog->nv_temp_max = NVIDIA_TEMP_MAX;
> + rog->nv_temp_target = NVIDIA_TEMP_MIN;
> +}
> +
> +static int __init asus_fw_init(void)
> +{
> + int err;
> +
> + fw_attrs.pending_reboot = 0;
> +
> + mutex_lock(&asus_armoury.mutex);
> +
> + asus_armoury.rog_tunables = kzalloc(sizeof(struct rog_tunables), GFP_KERNEL);
> + if (!asus_armoury.rog_tunables) {
> + mutex_unlock(&asus_armoury.mutex);
Please use guard() to make this function much simpler. But why you need
to take mutex here at all?
> + return -ENOMEM;
> + }
> + init_rog_tunables(asus_armoury.rog_tunables);
> +
> + err = asus_fw_attr_add();
> + mutex_unlock(&asus_armoury.mutex);
> + if (err)
> + return err;
> +
> + return 0;
> +}
> +
> +static void __exit asus_fw_exit(void)
> +{
> + mutex_lock(&asus_armoury.mutex);
> +
> + sysfs_remove_file(&asus_armoury.fw_attr_kset->kobj, &pending_reboot.attr);
> + kset_unregister(asus_armoury.fw_attr_kset);
> + device_destroy(fw_attr_class, MKDEV(0, 0));
> + fw_attributes_class_put();
> +
> + mutex_unlock(&asus_armoury.mutex);
> +}
> +
> +module_init(asus_fw_init);
> +module_exit(asus_fw_exit);
> +
> +MODULE_AUTHOR("Luke Jones <luke@xxxxxxxxxx>");
> +MODULE_DESCRIPTION("ASUS BIOS Configuration Driver");
> +MODULE_LICENSE("GPL");
> +MODULE_ALIAS("wmi:" ASUS_NB_WMI_EVENT_GUID);
> diff --git a/drivers/platform/x86/asus-armoury.h b/drivers/platform/x86/asus-armoury.h
> new file mode 100644
> index 000000000000..146170f91e69
> --- /dev/null
> +++ b/drivers/platform/x86/asus-armoury.h
> @@ -0,0 +1,195 @@
> +/* SPDX-License-Identifier: GPL-2.0
> + *
> + * Definitions for kernel modules using asus-armoury driver
> + *
> + * Copyright (c) 2024 Luke Jones <luke@xxxxxxxxxx>
> + */
> +
> +#ifndef _ASUS_BIOSCFG_H_
> +#define _ASUS_BIOSCFG_H_
> +
> +#include <linux/types.h>
This is missing some includes for structs and functions you use below.
> +
> +#define DRIVER_NAME "asus-armoury"
> +
> +static ssize_t attr_int_store(struct kobject *kobj, struct kobj_attribute *attr,
> + const char *buf, size_t count, u32 min, u32 max, u32 *store_value,
> + u32 wmi_dev);
> +
> +static ssize_t int_type_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
inline missing
> +{
> + return sysfs_emit(buf, "integer\n");
Lukas Wunner might have done something to make emitting constant strings
easier, please check out if that's already in mainline.
> +}
> +
> +static ssize_t enum_type_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
inline missing
> +{
> + return sysfs_emit(buf, "enumeration\n");
> +}
> +
> +#define __ASUS_ATTR_RO(_func, _name) \
> + { \
> + .attr = { .name = __stringify(_name), .mode = 0444 }, \
> + .show = _func##_##_name##_show, \
> + }
> +
> +#define __ASUS_ATTR_RO_AS(_name, _show) \
> + { \
> + .attr = { .name = __stringify(_name), .mode = 0444 }, \
> + .show = _show, \
> + }
> +
> +#define __ASUS_ATTR_RW(_func, _name) \
> + __ATTR(_name, 0644, _func##_##_name##_show, _func##_##_name##_store)
> +
> +#define __WMI_STORE_INT(_attr, _min, _max, _wmi) \
> + static ssize_t _attr##_store(struct kobject *kobj, struct kobj_attribute *attr, \
> + const char *buf, size_t count) \
> + { \
> + return attr_int_store(kobj, attr, buf, count, _min, _max, NULL, _wmi); \
> + }
> +
> +#define WMI_SHOW_INT(_attr, _fmt, _wmi) \
> + static ssize_t _attr##_show(struct kobject *kobj, struct kobj_attribute *attr, \
> + char *buf) \
> + { \
> + u32 result; \
> + int err; \
> + err = asus_wmi_get_devstate_dsts(_wmi, &result); \
> + if (err) \
> + return err; \
> + return sysfs_emit(buf, _fmt, result & ~ASUS_WMI_DSTS_PRESENCE_BIT); \
> + }
> +
> +/* Create functions and attributes for use in other macros or on their own */
> +
> +#define __ATTR_CURRENT_INT_RO(_attr, _wmi) \
> + WMI_SHOW_INT(_attr##_current_value, "%d\n", _wmi); \
> + static struct kobj_attribute attr_##_attr##_current_value = \
> + __ASUS_ATTR_RO(_attr, current_value)
> +
> +#define __ATTR_CURRENT_INT_RW(_attr, _minv, _maxv, _wmi) \
> + __WMI_STORE_INT(_attr##_current_value, _minv, _maxv, _wmi); \
> + WMI_SHOW_INT(_attr##_current_value, "%d\n", _wmi); \
> + static struct kobj_attribute attr_##_attr##_current_value = \
> + __ASUS_ATTR_RW(_attr, current_value)
> +
> +/* Shows a formatted static variable */
> +#define __ATTR_SHOW_FMT(_prop, _attrname, _fmt, _val) \
> + static ssize_t _attrname##_##_prop##_show(struct kobject *kobj, \
> + struct kobj_attribute *attr, char *buf) \
> + { \
> + return sysfs_emit(buf, _fmt, _val); \
> + } \
> + static struct kobj_attribute attr_##_attrname##_##_prop = \
> + __ASUS_ATTR_RO(_attrname, _prop)
> +
> +/* Boolean style enumeration, base macro. Requires adding show/store */
> +#define __ATTR_GROUP_ENUM(_attrname, _fsname, _possible, _dispname) \
> + __ATTR_SHOW_FMT(display_name, _attrname, "%s\n", _dispname); \
> + __ATTR_SHOW_FMT(possible_values, _attrname, "%s\n", _possible); \
> + static struct kobj_attribute attr_##_attrname##_type = \
> + __ASUS_ATTR_RO_AS(type, enum_type_show); \
> + static struct attribute *_attrname##_attrs[] = { \
> + &attr_##_attrname##_current_value.attr, &attr_##_attrname##_display_name.attr, \
> + &attr_##_attrname##_possible_values.attr, &attr_##_attrname##_type.attr, NULL \
> + }; \
> + static const struct attribute_group _attrname##_attr_group = { \
> + .name = _fsname, .attrs = _attrname##_attrs \
> + }
> +
> +#define ATTR_GROUP_BOOL_RO(_attrname, _fsname, _wmi, _dispname) \
> + __ATTR_CURRENT_INT_RO(_attrname, _wmi); \
> + __ATTR_GROUP_ENUM(_attrname, _fsname, "0;1", _dispname)
> +
> +#define ATTR_GROUP_BOOL_RW(_attrname, _fsname, _wmi, _dispname) \
> + __ATTR_CURRENT_INT_RW(_attrname, 0, 1, _wmi); \
> + __ATTR_GROUP_ENUM(_attrname, _fsname, "0;1", _dispname)
> +
> +/*
> + * Requires <name>_current_value_show(), <name>_current_value_show()
> + */
> +#define ATTR_GROUP_BOOL_CUSTOM(_attrname, _fsname, _dispname) \
> + static struct kobj_attribute attr_##_attrname##_current_value = \
> + __ASUS_ATTR_RW(_attrname, current_value); \
> + __ATTR_GROUP_ENUM(_attrname, _fsname, "0;1", _dispname)
> +
> +#define ATTR_GROUP_ENUM_INT_RO(_attrname, _fsname, _wmi, _possible, _dispname) \
> + __ATTR_CURRENT_INT_RO(_attrname, _wmi); \
> + __ATTR_GROUP_ENUM(_attrname, _fsname, _possible, _dispname)
> +
> +/*
> + * Requires <name>_current_value_show(), <name>_current_value_show()
> + * and <name>_possible_values_show()
> + */
> +#define ATTR_GROUP_ENUM_CUSTOM(_attrname, _fsname, _dispname) \
> + __ATTR_SHOW_FMT(display_name, _attrname, "%s\n", _dispname); \
> + static struct kobj_attribute attr_##_attrname##_current_value = \
> + __ASUS_ATTR_RW(_attrname, current_value); \
> + static struct kobj_attribute attr_##_attrname##_possible_values = \
> + __ASUS_ATTR_RO(_attrname, possible_values); \
> + static struct kobj_attribute attr_##_attrname##_type = \
> + __ASUS_ATTR_RO_AS(type, enum_type_show); \
> + static struct attribute *_attrname##_attrs[] = { \
> + &attr_##_attrname##_current_value.attr, &attr_##_attrname##_display_name.attr, \
> + &attr_##_attrname##_possible_values.attr, &attr_##_attrname##_type.attr, NULL \
> + }; \
> + static const struct attribute_group _attrname##_attr_group = { \
> + .name = _fsname, .attrs = _attrname##_attrs \
> + }
> +
> +/*
> + * ROG PPT attributes need a little different in setup as they
> + * require rog_tunables members.
> + */
> +
> +#define __ROG_TUNABLE_RW(_attr, _min, _max, _wmi) \
> + static ssize_t _attr##_current_value_store(struct kobject *kobj, \
> + struct kobj_attribute *attr, \
> + const char *buf, size_t count) \
> + { \
> + return attr_int_store(kobj, attr, buf, count, asus_armoury.rog_tunables->_min, \
> + asus_armoury.rog_tunables->_max, \
> + &asus_armoury.rog_tunables->_attr, _wmi); \
> + } \
> + static ssize_t _attr##_current_value_show(struct kobject *kobj, \
> + struct kobj_attribute *attr, char *buf) \
> + { \
> + return sysfs_emit(buf, "%u\n", asus_armoury.rog_tunables->_attr); \
> + } \
> + static struct kobj_attribute attr_##_attr##_current_value = \
> + __ASUS_ATTR_RW(_attr, current_value)
> +
> +#define __ROG_TUNABLE_SHOW(_prop, _attrname, _val) \
> + static ssize_t _attrname##_##_prop##_show(struct kobject *kobj, \
> + struct kobj_attribute *attr, char *buf) \
> + { \
> + return sysfs_emit(buf, "%d\n", asus_armoury.rog_tunables->_val); \
> + } \
> + static struct kobj_attribute attr_##_attrname##_##_prop = \
> + __ASUS_ATTR_RO(_attrname, _prop)
> +
> +#define ATTR_GROUP_ROG_TUNABLE(_attrname, _fsname, _wmi, _default, _min, _max, _incstep, \
> + _dispname) \
> + __ROG_TUNABLE_SHOW(default_value, _attrname, _default); \
> + __ROG_TUNABLE_RW(_attrname, _min, _max, _wmi); \
> + __ROG_TUNABLE_SHOW(min_value, _attrname, _min); \
> + __ROG_TUNABLE_SHOW(max_value, _attrname, _max); \
> + __ATTR_SHOW_FMT(scalar_increment, _attrname, "%d\n", _incstep); \
> + __ATTR_SHOW_FMT(display_name, _attrname, "%s\n", _dispname); \
> + static struct kobj_attribute attr_##_attrname##_type = \
> + __ASUS_ATTR_RO_AS(type, int_type_show); \
> + static struct attribute *_attrname##_attrs[] = { \
> + &attr_##_attrname##_current_value.attr, \
> + &attr_##_attrname##_default_value.attr, \
> + &attr_##_attrname##_min_value.attr, \
> + &attr_##_attrname##_max_value.attr, \
> + &attr_##_attrname##_scalar_increment.attr, \
> + &attr_##_attrname##_display_name.attr, \
> + &attr_##_attrname##_type.attr, \
> + NULL \
> + }; \
> + static const struct attribute_group _attrname##_attr_group = { \
> + .name = _fsname, .attrs = _attrname##_attrs \
> + }
> +
> +#endif /* _ASUS_BIOSCFG_H_ */
> diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
> index 0c80c6b0399b..165e7932c371 100644
> --- a/drivers/platform/x86/asus-wmi.c
> +++ b/drivers/platform/x86/asus-wmi.c
> @@ -550,12 +550,56 @@ static int asus_wmi_get_devstate(struct asus_wmi *asus, u32 dev_id, u32 *retval)
> return 0;
> }
>
> -static int asus_wmi_set_devstate(u32 dev_id, u32 ctrl_param,
> - u32 *retval)
> +/**
> + * asus_wmi_get_devstate_dsts() - Get the WMI function state.
> + * @dev_id: The WMI function to call.
> + * @retval: A pointer to where to store the value returned from WMI.
> + *
> + * The returned WMI function state can also be used to determine if the WMI
> + * function is supported by checking if the asus_wmi_get_devstate_dsts()
> + * returns an error.
> + *
> + * On success the return value is 0, and the retval is a valid value returned
> + * by the successful WMI function call. An error value is returned only if the
> + * WMI function failed, or if it returns "unsupported" which is typically a 0
> + * (no return, and no 'supported' bit set), or a 0xFFFFFFFE (~1) which if not
> + * caught here can result in unexpected behaviour later.
> + */
> +int asus_wmi_get_devstate_dsts(u32 dev_id, u32 *retval)
> +{
> + int err;
> +
> + err = asus_wmi_evaluate_method(ASUS_WMI_METHODID_DSTS, dev_id, 0, retval);
> + if (err)
> + return err;
> + /* Be explicit about retval */
> + if (*retval == 0xFFFFFFFE || *retval == 0)
Please name the literals with defines.
> + return -ENODEV;
> +
> + return 0;
> +}
> +EXPORT_SYMBOL_GPL(asus_wmi_get_devstate_dsts);
> +
> +/**
> + * asus_wmi_set_devstate() - Set the WMI function state.
> + * @dev_id: The WMI function to call.
> + * @ctrl_param: The argument to be used for this WMI function.
> + * @retval: A pointer to where to store the value returned from WMI.
> + *
> + * The returned WMI function state if not checked here for error as
> + * asus_wmi_set_devstate() is not called unless first paired with a call to
> + * asus_wmi_get_devstate_dsts() to check that the WMI function is supported.
> + *
> + * On success the return value is 0, and the retval is a valid value returned
> + * by the successful WMI function call. An error value is returned only if the
> + * WMI function failed.
> + */
> +int asus_wmi_set_devstate(u32 dev_id, u32 ctrl_param, u32 *retval)
> {
> return asus_wmi_evaluate_method(ASUS_WMI_METHODID_DEVS, dev_id,
> ctrl_param, retval);
> }
> +EXPORT_SYMBOL_GPL(asus_wmi_set_devstate);
Namespace exports.
--
i.
> /* Helper for special devices with magic return codes */
> static int asus_wmi_get_devstate_bits(struct asus_wmi *asus,
> diff --git a/include/linux/platform_data/x86/asus-wmi.h b/include/linux/platform_data/x86/asus-wmi.h
> index b601b245a035..c164e656ae0b 100644
> --- a/include/linux/platform_data/x86/asus-wmi.h
> +++ b/include/linux/platform_data/x86/asus-wmi.h
> @@ -72,6 +72,7 @@
> #define ASUS_WMI_DEVID_THROTTLE_THERMAL_POLICY_VIVO 0x00110019
>
> /* Misc */
> +#define ASUS_WMI_DEVID_PANEL_HD 0x0005001C
> #define ASUS_WMI_DEVID_PANEL_OD 0x00050019
> #define ASUS_WMI_DEVID_CAMERA 0x00060013
> #define ASUS_WMI_DEVID_LID_FLIP 0x00060062
> @@ -157,8 +158,18 @@
> #define ASUS_WMI_DSTS_LIGHTBAR_MASK 0x0000000F
>
> #if IS_REACHABLE(CONFIG_ASUS_WMI)
> +int asus_wmi_get_devstate_dsts(u32 dev_id, u32 *retval);
> +int asus_wmi_set_devstate(u32 dev_id, u32 ctrl_param, u32 *retval);
> int asus_wmi_evaluate_method(u32 method_id, u32 arg0, u32 arg1, u32 *retval);
> #else
> +static int asus_wmi_get_devstate_dsts(u32 dev_id, u32 *retval)
> +{
> + return -ENODEV;
> +}
> +static int asus_wmi_set_devstate(u32 dev_id, u32 ctrl_param, u32 *retval)
> +{
> + return -ENODEV;
> +}
> static inline int asus_wmi_evaluate_method(u32 method_id, u32 arg0, u32 arg1,
> u32 *retval)
> {
>
