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linux-kernel/linux-7.2.3/drivers/platform/x86/lenovo/wmi-other.c
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lastdragon ad2088d178 Resguardo inicial
2026-09-06 12:53:21 -06:00

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Lenovo Other Mode WMI interface driver.
*
* This driver uses the fw_attributes class to expose the various WMI functions
* provided by the "Other Mode" WMI interface. This enables CPU and GPU power
* limit as well as various other attributes for devices that fall under the
* "Gaming Series" of Lenovo laptop devices. Each attribute exposed by the
* "Other Mode" interface has a corresponding Capability Data struct that
* allows the driver to probe details about the attribute such as if it is
* supported by the hardware, the default_value, max_value, min_value, and step
* increment.
*
* These attributes typically don't fit anywhere else in the sysfs and are set
* in Windows using one of Lenovo's multiple user applications.
*
* Additionally, this driver also exports tunable fan speed RPM to HWMON.
* Min/max RPM are also provided for reference.
*
* Copyright (C) 2025 Derek J. Clark <derekjohn.clark@gmail.com>
* - fw_attributes
* - binding to Capability Data 01
*
* Copyright (C) 2025 Rong Zhang <i@rong.moe>
* - HWMON
* - binding to Capability Data 00 and Fan
*/
#include <linux/acpi.h>
#include <linux/bitfield.h>
#include <linux/cleanup.h>
#include <linux/component.h>
#include <linux/container_of.h>
#include <linux/device.h>
#include <linux/export.h>
#include <linux/gfp_types.h>
#include <linux/hwmon.h>
#include <linux/idr.h>
#include <linux/kdev_t.h>
#include <linux/kobject.h>
#include <linux/limits.h>
#include <linux/module.h>
#include <linux/platform_profile.h>
#include <linux/power_supply.h>
#include <linux/types.h>
#include <linux/wmi.h>
#include <acpi/battery.h>
#include "wmi-capdata.h"
#include "wmi-events.h"
#include "wmi-helpers.h"
#include "../firmware_attributes_class.h"
#define LENOVO_OTHER_MODE_GUID "DC2A8805-3A8C-41BA-A6F7-092E0089CD3B"
enum lwmi_feature_id_cpu {
LWMI_FEATURE_ID_CPU_SPPT = 0x01,
LWMI_FEATURE_ID_CPU_SPL = 0x02,
LWMI_FEATURE_ID_CPU_FPPT = 0x03,
LWMI_FEATURE_ID_CPU_TEMP = 0x04,
LWMI_FEATURE_ID_CPU_APU = 0x05,
LWMI_FEATURE_ID_CPU_CL = 0x06,
LWMI_FEATURE_ID_CPU_TAU = 0x07,
LWMI_FEATURE_ID_CPU_IPL = 0x09,
};
enum lwmi_feature_id_gpu {
LWMI_FEATURE_ID_GPU_NV_PPAB = 0x01,
LWMI_FEATURE_ID_GPU_NV_CTGP = 0x02,
LWMI_FEATURE_ID_GPU_TEMP = 0x03,
LWMI_FEATURE_ID_GPU_AC_OFFSET = 0x04,
LWMI_FEATURE_ID_DGPU_BOOST_CLK = 0x06,
LWMI_FEATURE_ID_DGPU_EN = 0x07,
LWMI_FEATURE_ID_GPU_MODE = 0x08,
LWMI_FEATURE_ID_DGPU_DIDVID = 0x09,
LWMI_FEATURE_ID_GPU_NV_BPL = 0x0a,
LWMI_FEATURE_ID_GPU_NV_CPU_BOOST = 0x0b,
};
enum lwmi_feature_id_psu {
LWMI_FEATURE_ID_PSU_CHARGE_TYPES = 0x01,
LWMI_FEATURE_ID_PSU_CHARGE_BEHAVIOUR = 0x02,
};
#define LWMI_FEATURE_ID_FAN_RPM 0x03
#define LWMI_TYPE_ID_CROSSLOAD 0x01
#define LWMI_TYPE_ID_PSU_AC 0x01
#define LWMI_FEATURE_VALUE_GET 17
#define LWMI_FEATURE_VALUE_SET 18
#define LWMI_FAN_ID_BASE 1
#define LWMI_FAN_NR 4
#define LWMI_FAN_ID(x) ((x) + LWMI_FAN_ID_BASE)
#define LWMI_FAN_DIV 100
#define LWMI_CHARGE_BEHAVIOR_DISCHARGE 0x00
#define LWMI_CHARGE_BEHAVIOR_AUTO 0x01
#define LWMI_CHARGE_TYPE_STANDARD 0x00
#define LWMI_CHARGE_TYPE_LONGLIFE 0x01
#define LWMI_ATTR_ID_FAN_RPM(x) \
lwmi_attr_id(LWMI_DEVICE_ID_FAN, LWMI_FEATURE_ID_FAN_RPM, \
LWMI_GZ_THERMAL_MODE_NONE, LWMI_FAN_ID(x))
#define LWMI_ATTR_ID_PSU(feat, type) \
lwmi_attr_id(LWMI_DEVICE_ID_PSU, feat, \
LWMI_GZ_THERMAL_MODE_NONE, type)
#define LWMI_OM_SYSFS_NAME "lenovo-wmi-other"
#define LWMI_OM_HWMON_NAME "lenovo_wmi_other"
static DEFINE_IDA(lwmi_om_ida);
enum attribute_property {
DEFAULT_VAL,
MAX_VAL,
MIN_VAL,
STEP_VAL,
SUPPORTED,
};
struct lwmi_fan_info {
u32 supported;
u32 last_target;
long min_rpm;
long max_rpm;
};
struct lwmi_om_priv {
struct component_master_ops *ops;
/* only valid after capdata bind */
struct cd_list *cd00_list;
struct cd_list *cd01_list;
struct device *hwmon_dev;
struct device *fw_attr_dev;
struct kset *fw_attr_kset;
struct wmi_device *wdev;
int ida_id;
struct lwmi_fan_info fan_info[LWMI_FAN_NR];
struct {
bool capdata00_collected : 1;
bool capdata_fan_collected : 1;
} fan_flags;
enum power_supply_charge_behaviour charge_behaviour;
const struct power_supply_ext *battery_ext;
struct acpi_battery_hook battery_hook;
bool bh_registered;
};
/*
* Visibility of fan channels:
*
* +-------------------+---------+------------------+-----------------------+------------+
* | | default | +expose_all_fans | +relax_fan_constraint | +both |
* +-------------------+---------+------------------+-----------------------+------------+
* | canonical | RW | RW | RW+relaxed | RW+relaxed |
* +-------------------+---------+------------------+-----------------------+------------+
* | -capdata_fan[idx] | N | RO | N | RW+relaxed |
* +-------------------+---------+------------------+-----------------------+------------+
*
* Note:
* 1. LWMI_ATTR_ID_FAN_RPM[idx].supported is always checked before exposing a channel.
* 2. -capdata_fan implies -capdata_fan[idx].
*/
static bool expose_all_fans;
module_param(expose_all_fans, bool, 0444);
MODULE_PARM_DESC(expose_all_fans,
"This option skips some capability checks and solely relies on per-channel ones "
"to expose fan attributes. Use with caution.");
static bool relax_fan_constraint;
module_param(relax_fan_constraint, bool, 0444);
MODULE_PARM_DESC(relax_fan_constraint,
"Do not enforce fan RPM constraint (div/min/max) "
"and enables fan tuning when such data is missing. "
"Enabling this may results in HWMON attributes being out-of-sync, "
"and setting a too low RPM stops the fan. Use with caution.");
/* Visibility of power supply extensions */
static bool force_load_psy_ext;
module_param(force_load_psy_ext, bool, 0444);
MODULE_PARM_DESC(force_load_psy_ext,
"This option will skip checking if the ideapad_laptop driver will conflict "
"with adding an extension to set the battery charge behavior and battery charge "
"control end threshold. It will also skip checking if the BIOS reports that "
"those features are fully supported. It is recommended to blacklist the ideapad "
"driver before using this option.");
/* ======== HWMON (component: lenovo-wmi-capdata 00 & fan) ======== */
/**
* lwmi_om_fan_get_set() - Get or set fan RPM value of specified fan
* @priv: Driver private data structure
* @channel: Fan channel index (0-based)
* @val: Pointer to value (input for set, output for get)
* @set: True to set value, false to get value
*
* Communicates with WMI interface to either retrieve current fan RPM
* or set target fan RPM.
*
* Return: 0 on success, or an error code.
*/
static int lwmi_om_fan_get_set(struct lwmi_om_priv *priv, int channel, u32 *val, bool set)
{
struct wmi_method_args_32 args = {};
u32 method_id, retval;
int err;
method_id = set ? LWMI_FEATURE_VALUE_SET : LWMI_FEATURE_VALUE_GET;
args.arg0 = LWMI_ATTR_ID_FAN_RPM(channel);
args.arg1 = set ? *val : 0;
err = lwmi_dev_evaluate_int(priv->wdev, 0x0, method_id,
(unsigned char *)&args, sizeof(args), &retval);
if (err)
return err;
if (!set) {
*val = retval;
return 0;
}
/*
* It seems that 0 means "no error" and 1 means "done". Apparently
* different firmware teams have different thoughts on indicating
* success, so we accepts both.
*/
return (retval == 0 || retval == 1) ? 0 : -EIO;
}
/**
* lwmi_om_hwmon_is_visible() - Determine visibility of HWMON attributes
* @drvdata: Driver private data
* @type: Sensor type
* @attr: Attribute identifier
* @channel: Channel index
*
* Determines whether an HWMON attribute should be visible in sysfs
* based on hardware capabilities and current configuration.
*
* Return: permission mode, or 0 if invisible.
*/
static umode_t lwmi_om_hwmon_is_visible(const void *drvdata, enum hwmon_sensor_types type,
u32 attr, int channel)
{
struct lwmi_om_priv *priv = (struct lwmi_om_priv *)drvdata;
bool visible = false;
if (type == hwmon_fan) {
if (!(priv->fan_info[channel].supported & LWMI_SUPP_VALID))
return 0;
switch (attr) {
case hwmon_fan_target:
if (!(priv->fan_info[channel].supported & LWMI_SUPP_SET))
return 0;
if (relax_fan_constraint ||
(priv->fan_info[channel].min_rpm >= 0 &&
priv->fan_info[channel].max_rpm >= 0))
return 0644;
/*
* Reaching here implies expose_all_fans is set.
* See lwmi_om_hwmon_add().
*/
dev_warn_once(&priv->wdev->dev,
"fan tuning disabled due to missing RPM constraint\n");
return 0;
case hwmon_fan_div:
case hwmon_fan_input:
visible = priv->fan_info[channel].supported & LWMI_SUPP_GET;
break;
case hwmon_fan_min:
visible = priv->fan_info[channel].min_rpm >= 0;
break;
case hwmon_fan_max:
visible = priv->fan_info[channel].max_rpm >= 0;
break;
}
}
return visible ? 0444 : 0;
}
/**
* lwmi_om_hwmon_read() - Read HWMON sensor data
* @dev: Device pointer
* @type: Sensor type
* @attr: Attribute identifier
* @channel: Channel index
* @val: Pointer to store value
*
* Reads current sensor values from hardware through WMI interface.
*
* Return: 0 on success, or an error code.
*/
static int lwmi_om_hwmon_read(struct device *dev, enum hwmon_sensor_types type,
u32 attr, int channel, long *val)
{
struct lwmi_om_priv *priv = dev_get_drvdata(dev);
u32 retval = 0;
int err;
if (type == hwmon_fan) {
switch (attr) {
/*
* The EC has an internal RPM divisor (i.e., the raw register value is
* RPM / fanY_div). For fanY_input, the WMI method reads the register
* value and returns raw * fanY_div. For fanY_target, the WMI method
* divides the written value by fanY_div before writing it to the EC.
*
* As a result, reading fanY_input always returns a multiple of fanY_div,
* while writing to fanY_target loses the remainder.
*/
case hwmon_fan_div:
*val = LWMI_FAN_DIV;
return 0;
case hwmon_fan_input:
err = lwmi_om_fan_get_set(priv, channel, &retval, false);
if (err)
return err;
*val = retval;
return 0;
case hwmon_fan_target:
*val = priv->fan_info[channel].last_target;
return 0;
case hwmon_fan_min:
*val = priv->fan_info[channel].min_rpm;
return 0;
case hwmon_fan_max:
*val = priv->fan_info[channel].max_rpm;
return 0;
}
}
return -EOPNOTSUPP;
}
/**
* lwmi_om_hwmon_write() - Write HWMON sensor data
* @dev: Device pointer
* @type: Sensor type
* @attr: Attribute identifier
* @channel: Channel index
* @val: Value to write
*
* Writes configuration values to hardware through WMI interface.
*
* Return: 0 on success, or an error code.
*/
static int lwmi_om_hwmon_write(struct device *dev, enum hwmon_sensor_types type,
u32 attr, int channel, long val)
{
struct lwmi_om_priv *priv = dev_get_drvdata(dev);
u32 raw, min_rpm, max_rpm;
int err;
if (type == hwmon_fan) {
switch (attr) {
case hwmon_fan_target:
if (relax_fan_constraint) {
min_rpm = 1;
max_rpm = U16_MAX;
} else {
min_rpm = priv->fan_info[channel].min_rpm;
max_rpm = priv->fan_info[channel].max_rpm;
}
/* 0 means "auto". */
if (val != 0 && (val < min_rpm || val > max_rpm))
return -EINVAL;
/*
* The effective fanY_target is always a multiple of fanY_div
* due to the EC's internal RPM divisor (see lwmi_om_hwmon_read).
*
* Round down the written value to the nearest multiple of fanY_div
* to prevent mismatch between the effective value and last_target.
*
* For relax_fan_constraint, skip this conversion as setting a
* sub-fanY_div value is necessary to completely stop the fan on
* some devices.
*/
if (!relax_fan_constraint)
raw = val / LWMI_FAN_DIV * LWMI_FAN_DIV;
else
raw = val;
err = lwmi_om_fan_get_set(priv, channel, &raw, true);
if (err)
return err;
priv->fan_info[channel].last_target = raw;
return 0;
}
}
return -EOPNOTSUPP;
}
static const struct hwmon_channel_info * const lwmi_om_hwmon_info[] = {
/* Must match LWMI_FAN_NR. */
HWMON_CHANNEL_INFO(fan,
HWMON_F_INPUT | HWMON_F_TARGET | HWMON_F_DIV |
HWMON_F_MIN | HWMON_F_MAX,
HWMON_F_INPUT | HWMON_F_TARGET | HWMON_F_DIV |
HWMON_F_MIN | HWMON_F_MAX,
HWMON_F_INPUT | HWMON_F_TARGET | HWMON_F_DIV |
HWMON_F_MIN | HWMON_F_MAX,
HWMON_F_INPUT | HWMON_F_TARGET | HWMON_F_DIV |
HWMON_F_MIN | HWMON_F_MAX),
NULL
};
static const struct hwmon_ops lwmi_om_hwmon_ops = {
.is_visible = lwmi_om_hwmon_is_visible,
.read = lwmi_om_hwmon_read,
.write = lwmi_om_hwmon_write,
};
static const struct hwmon_chip_info lwmi_om_hwmon_chip_info = {
.ops = &lwmi_om_hwmon_ops,
.info = lwmi_om_hwmon_info,
};
/**
* lwmi_om_hwmon_add() - Register HWMON device if all info is collected
* @priv: Driver private data
*/
static void lwmi_om_hwmon_add(struct lwmi_om_priv *priv)
{
int i, valid;
if (WARN_ON(priv->hwmon_dev))
return;
if (!priv->fan_flags.capdata00_collected || !priv->fan_flags.capdata_fan_collected) {
dev_dbg(&priv->wdev->dev, "HWMON registration pending (00: %d, fan: %d)\n",
priv->fan_flags.capdata00_collected,
priv->fan_flags.capdata_fan_collected);
return;
}
if (expose_all_fans)
dev_warn(&priv->wdev->dev, "all fans exposed. Use with caution\n");
if (relax_fan_constraint)
dev_warn(&priv->wdev->dev, "fan RPM constraint relaxed. Use with caution\n");
valid = 0;
for (i = 0; i < LWMI_FAN_NR; i++) {
if (!(priv->fan_info[i].supported & LWMI_SUPP_VALID))
continue;
valid++;
if (!expose_all_fans &&
(priv->fan_info[i].min_rpm < 0 || priv->fan_info[i].max_rpm < 0)) {
dev_dbg(&priv->wdev->dev, "missing RPM constraint for fan%d, hiding\n",
LWMI_FAN_ID(i));
priv->fan_info[i].supported = 0;
valid--;
}
}
if (valid == 0) {
dev_warn(&priv->wdev->dev,
"fan reporting/tuning is unsupported on this device\n");
return;
}
priv->hwmon_dev = hwmon_device_register_with_info(&priv->wdev->dev,
LWMI_OM_HWMON_NAME, priv,
&lwmi_om_hwmon_chip_info,
NULL);
if (IS_ERR(priv->hwmon_dev)) {
dev_warn(&priv->wdev->dev, "failed to register HWMON device: %ld\n",
PTR_ERR(priv->hwmon_dev));
priv->hwmon_dev = NULL;
return;
}
dev_dbg(&priv->wdev->dev, "registered HWMON device\n");
}
/**
* lwmi_om_hwmon_remove() - Unregister HWMON device
* @priv: Driver private data
*
* Unregisters the HWMON device if applicable.
*/
static void lwmi_om_hwmon_remove(struct lwmi_om_priv *priv)
{
if (!priv->hwmon_dev)
return;
hwmon_device_unregister(priv->hwmon_dev);
priv->hwmon_dev = NULL;
}
/**
* lwmi_om_fan_info_init() - Initialzie fan info
* @priv: Driver private data
*
* lwmi_om_fan_info_collect_cd00() and lwmi_om_fan_info_collect_cd_fan() may be
* called in an arbitrary order. Hence, initializion must be done before.
*/
static void lwmi_om_fan_info_init(struct lwmi_om_priv *priv)
{
int i;
for (i = 0; i < LWMI_FAN_NR; i++) {
priv->fan_info[i] = (struct lwmi_fan_info) {
.supported = 0,
/*
* Assume 0 on probe as the EC resets all fans to auto mode on (re)boot.
*
* Note that S0ix (s2idle) preserves the RPM target, so we don't need
* suspend/resume callbacks. This behavior has not been tested on S3-
* capable devices, but I doubt if such devices even have this interface.
*/
.last_target = 0,
.min_rpm = -ENODATA,
.max_rpm = -ENODATA,
};
}
priv->fan_flags.capdata00_collected = false;
priv->fan_flags.capdata_fan_collected = false;
}
/**
* lwmi_om_fan_info_collect_cd00() - Collect fan info from capdata 00
* @priv: Driver private data
*/
static void lwmi_om_fan_info_collect_cd00(struct lwmi_om_priv *priv)
{
struct capdata00 capdata00;
int i, err;
dev_dbg(&priv->wdev->dev, "Collecting fan info from capdata00\n");
for (i = 0; i < LWMI_FAN_NR; i++) {
err = lwmi_cd00_get_data(priv->cd00_list, LWMI_ATTR_ID_FAN_RPM(i), &capdata00);
priv->fan_info[i].supported = err ? 0 : capdata00.supported;
}
priv->fan_flags.capdata00_collected = true;
lwmi_om_hwmon_add(priv);
}
/**
* lwmi_om_fan_info_collect_cd_fan() - Collect fan info from capdata fan
* @dev: Pointer to the lenovo-wmi-other device
* @cd_fan_list: Pointer to the capdata fan list
*/
static void lwmi_om_fan_info_collect_cd_fan(struct device *dev, struct cd_list *cd_fan_list)
{
struct lwmi_om_priv *priv = dev_get_drvdata(dev);
struct capdata_fan capdata_fan;
int i, err;
dev_dbg(dev, "Collecting fan info from capdata_fan\n");
if (!cd_fan_list)
goto out;
for (i = 0; i < LWMI_FAN_NR; i++) {
err = lwmi_cd_fan_get_data(cd_fan_list, LWMI_FAN_ID(i), &capdata_fan);
if (err)
continue;
priv->fan_info[i].min_rpm = capdata_fan.min_rpm;
priv->fan_info[i].max_rpm = capdata_fan.max_rpm;
}
out:
priv->fan_flags.capdata_fan_collected = true;
lwmi_om_hwmon_add(priv);
}
/* ======== Power Supply Extension (component: lenovo-wmi-capdata 00) ======== */
/**
* lwmi_psy_ext_get_prop() - Get a power_supply_ext property
* @ps: The battery that was extended
* @ext: The extension
* @ext_data: Pointer to the lwmi_om_priv drvdata
* @prop: The property to read
* @val: The value to return
*
* Reads the given value from the power_supply_ext property
*
* Return: 0 on success, or an error
*/
static int lwmi_psy_ext_get_prop(struct power_supply *ps,
const struct power_supply_ext *ext,
void *ext_data,
enum power_supply_property prop,
union power_supply_propval *val)
{
struct lwmi_om_priv *priv = ext_data;
struct wmi_method_args_32 args = {};
u32 retval;
int ret;
switch (prop) {
case POWER_SUPPLY_PROP_CHARGE_BEHAVIOUR:
/* Reading from BIOS reads the wrong bit. Use cached value */
val->intval = priv->charge_behaviour;
return 0;
case POWER_SUPPLY_PROP_CHARGE_TYPES:
args.arg0 = LWMI_ATTR_ID_PSU(LWMI_FEATURE_ID_PSU_CHARGE_TYPES,
LWMI_TYPE_ID_PSU_AC);
break;
default:
return -EINVAL;
}
ret = lwmi_dev_evaluate_int(priv->wdev, 0x0, LWMI_FEATURE_VALUE_GET,
(u8 *)&args, sizeof(args),
&retval);
if (ret)
return ret;
dev_dbg(&priv->wdev->dev, "Got return value %#x for property %#x\n", retval, prop);
switch (retval) {
case LWMI_CHARGE_TYPE_LONGLIFE:
val->intval = POWER_SUPPLY_CHARGE_TYPE_LONGLIFE;
break;
case LWMI_CHARGE_TYPE_STANDARD:
val->intval = POWER_SUPPLY_CHARGE_TYPE_STANDARD;
break;
default:
dev_err(&priv->wdev->dev, "Got invalid charge types value: %#x\n", retval);
return -EINVAL;
}
return 0;
}
/**
* lwmi_psy_ext_set_prop() - Set a power_supply_ext property
* @ps: The battery that was extended
* @ext: The extension
* @ext_data: Pointer to the lwmi_om_priv drvdata
* @prop: The property to write
* @val: The value to write
*
* Writes the given value to the power_supply_ext property
*
* Return: 0 on success, or an error
*/
static int lwmi_psy_ext_set_prop(struct power_supply *ps,
const struct power_supply_ext *ext,
void *ext_data,
enum power_supply_property prop,
const union power_supply_propval *val)
{
struct lwmi_om_priv *priv = ext_data;
struct wmi_method_args_32 args = {};
switch (prop) {
case POWER_SUPPLY_PROP_CHARGE_BEHAVIOUR:
args.arg0 = LWMI_ATTR_ID_PSU(LWMI_FEATURE_ID_PSU_CHARGE_BEHAVIOUR,
LWMI_TYPE_ID_NONE);
switch (val->intval) {
case POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO:
args.arg1 = LWMI_CHARGE_BEHAVIOR_AUTO;
break;
case POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE:
args.arg1 = LWMI_CHARGE_BEHAVIOR_DISCHARGE;
break;
default:
dev_err(&priv->wdev->dev, "Got invalid charge behavior value: %#x\n",
val->intval);
return -EINVAL;
}
priv->charge_behaviour = val->intval;
break;
case POWER_SUPPLY_PROP_CHARGE_TYPES:
args.arg0 = LWMI_ATTR_ID_PSU(LWMI_FEATURE_ID_PSU_CHARGE_TYPES,
LWMI_TYPE_ID_PSU_AC);
switch (val->intval) {
case POWER_SUPPLY_CHARGE_TYPE_LONGLIFE:
args.arg1 = LWMI_CHARGE_TYPE_LONGLIFE;
break;
case POWER_SUPPLY_CHARGE_TYPE_STANDARD:
args.arg1 = LWMI_CHARGE_TYPE_STANDARD;
break;
default:
dev_err(&priv->wdev->dev, "Got invalid charge types value: %#x\n",
val->intval);
return -EINVAL;
}
break;
default:
return -EINVAL;
}
dev_dbg(&priv->wdev->dev, "Attempting to set %#010x for property %#x to %#x\n",
args.arg0, prop, args.arg1);
return lwmi_dev_evaluate_int(priv->wdev, 0x0, LWMI_FEATURE_VALUE_SET,
(u8 *)&args, sizeof(args), NULL);
}
/** lwmi_psy_prop_get_supported() - Gets the support level from capdata for a given property
* @priv: Pointer to the lwmi_om_priv drvdata
* @prop: The power supply property to be evaluated
*
* Return: bitmapped capability data support level
*/
static u32 lwmi_psy_prop_get_supported(struct lwmi_om_priv *priv, enum power_supply_property prop)
{
struct capdata00 capdata;
u32 attribute_id;
int ret;
switch (prop) {
case POWER_SUPPLY_PROP_CHARGE_BEHAVIOUR:
attribute_id = LWMI_ATTR_ID_PSU(LWMI_FEATURE_ID_PSU_CHARGE_BEHAVIOUR,
LWMI_TYPE_ID_NONE);
break;
case POWER_SUPPLY_PROP_CHARGE_TYPES:
attribute_id = LWMI_ATTR_ID_PSU(LWMI_FEATURE_ID_PSU_CHARGE_TYPES,
LWMI_TYPE_ID_PSU_AC);
break;
default:
return 0;
}
ret = lwmi_cd00_get_data(priv->cd00_list, attribute_id, &capdata);
if (ret)
return 0;
dev_dbg(&priv->wdev->dev, "Battery charge feature (%#010x) support level: %#x\n",
attribute_id, capdata.supported);
return capdata.supported;
}
/**
* lwmi_psy_prop_is_supported() - Determine if the property is supported
* @priv: Pointer to the lwmi_om_priv drvdata
* @prop: The power supply property to be evaluated
*
* Checks capdata 00 to determine if the property is supported.
*
* Return: true if readable, or false
*/
static bool lwmi_psy_prop_is_supported(struct lwmi_om_priv *priv, enum power_supply_property prop)
{
int ret;
if (force_load_psy_ext)
return true;
ret = lwmi_psy_prop_get_supported(priv, prop);
if (ret < 0)
return false;
return (ret & LWMI_SUPP_VALID) && (ret & LWMI_SUPP_GET);
}
/**
* lwmi_psy_prop_is_writeable() - Determine if the property is writeable
* @ps: The battery that was extended
* @ext: The extension
* @ext_data: Pointer the lwmi_om_priv drvdata
* @prop: The property to check
*
* Checks capdata 00 to determine if the property is writable.
*
* Return: true if writable, or false
*/
static int lwmi_psy_prop_is_writeable(struct power_supply *ps,
const struct power_supply_ext *ext,
void *ext_data,
enum power_supply_property prop)
{
struct lwmi_om_priv *priv = ext_data;
int ret;
if (force_load_psy_ext)
return true;
ret = lwmi_psy_prop_get_supported(priv, prop);
if (ret < 0)
return false;
return !!(ret & LWMI_SUPP_SET);
}
#define DEFINE_LWMI_POWER_SUPPLY_EXTENSION(_name, _props, _behaviours, _types) \
static const struct power_supply_ext _name = { \
.name = LWMI_OM_SYSFS_NAME, \
.properties = _props, \
.num_properties = ARRAY_SIZE(_props), \
.charge_behaviours = _behaviours, \
.charge_types = _types, \
.get_property = lwmi_psy_ext_get_prop, \
.set_property = lwmi_psy_ext_set_prop, \
.property_is_writeable = lwmi_psy_prop_is_writeable, \
}
static const enum power_supply_property lwmi_psy_ext_props_all[] = {
POWER_SUPPLY_PROP_CHARGE_BEHAVIOUR,
POWER_SUPPLY_PROP_CHARGE_TYPES,
};
static const enum power_supply_property lwmi_psy_ext_props_types[] = {
POWER_SUPPLY_PROP_CHARGE_TYPES,
};
static const enum power_supply_property lwmi_psy_ext_props_behaviour[] = {
POWER_SUPPLY_PROP_CHARGE_BEHAVIOUR,
};
#define LWMI_CHARGE_BEHAVIOURS (BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO) | \
BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE))
#define LWMI_CHARGE_TYPES (BIT(POWER_SUPPLY_CHARGE_TYPE_STANDARD) | \
BIT(POWER_SUPPLY_CHARGE_TYPE_LONGLIFE))
DEFINE_LWMI_POWER_SUPPLY_EXTENSION(lwmi_psy_ext_all, lwmi_psy_ext_props_all,
LWMI_CHARGE_BEHAVIOURS, LWMI_CHARGE_TYPES);
DEFINE_LWMI_POWER_SUPPLY_EXTENSION(lwmi_psy_ext_types, lwmi_psy_ext_props_types,
0, LWMI_CHARGE_TYPES);
DEFINE_LWMI_POWER_SUPPLY_EXTENSION(lwmi_psy_ext_behaviour, lwmi_psy_ext_props_behaviour,
LWMI_CHARGE_BEHAVIOURS, 0);
#define LWMI_PSY_PROP_BEHAVIOUR BIT(0)
#define LWMI_PSY_PROP_TYPES BIT(1)
static const struct power_supply_ext *lwmi_psy_exts[] = {
[LWMI_PSY_PROP_BEHAVIOUR] = &lwmi_psy_ext_behaviour,
[LWMI_PSY_PROP_TYPES] = &lwmi_psy_ext_types,
[LWMI_PSY_PROP_BEHAVIOUR | LWMI_PSY_PROP_TYPES] = &lwmi_psy_ext_all,
};
/**
* lwmi_add_battery() - Connect the power_supply_ext
* @battery: The battery to extend
* @hook: The driver hook used to extend the battery
*
* Return: 0 on success, or an error.
*/
static int lwmi_add_battery(struct power_supply *battery, struct acpi_battery_hook *hook)
{
struct lwmi_om_priv *priv = container_of(hook, struct lwmi_om_priv, battery_hook);
return power_supply_register_extension(battery, priv->battery_ext, &priv->wdev->dev, priv);
}
/**
* lwmi_remove_battery() - Disconnect the power_supply_ext
* @battery: The battery that was extended
* @hook: The driver hook used to extend the battery
*
* Return: 0 on success, or an error.
*/
static int lwmi_remove_battery(struct power_supply *battery, struct acpi_battery_hook *hook)
{
struct lwmi_om_priv *priv = container_of(hook, struct lwmi_om_priv, battery_hook);
power_supply_unregister_extension(battery, priv->battery_ext);
return 0;
}
/**
* lwmi_acpi_match() - Attempts to return the ideapad acpi handle
* @handle: The ACPI handle that manages battery charging
* @lvl: Unused
* @context: Void pointer to the acpi_handle object to return
* @retval: Unused
*
* Checks if the ideapad_laptop driver is going to manage charge_type first,
* then if not, hooks the battery to our WMI methods.
*
* Return: AE_CTRL_TERMINATE if found, AE_OK if not found.
*/
static acpi_status lwmi_acpi_match(acpi_handle handle, u32 lvl,
void *context, void **retval)
{
acpi_handle *ahand = context;
if (!handle)
return AE_OK;
*ahand = handle;
return AE_CTRL_TERMINATE;
}
/**
* lwmi_om_psy_ext_init() - Hooks power supply extension to device battery
* @priv: Pointer to the lwmi_om_priv drvdata.
*
* Checks if the ideapad_laptop driver is going to manage charge attributes first,
* then if not, hooks the battery to our WMI methods if they are supported.
*/
static void lwmi_om_psy_ext_init(struct lwmi_om_priv *priv)
{
static const char * const ideapad_hid = "VPC2004";
acpi_handle handle = NULL;
unsigned int props = 0;
int ret;
if (lwmi_psy_prop_is_supported(priv, POWER_SUPPLY_PROP_CHARGE_BEHAVIOUR))
props |= LWMI_PSY_PROP_BEHAVIOUR;
if (lwmi_psy_prop_is_supported(priv, POWER_SUPPLY_PROP_CHARGE_TYPES))
props |= LWMI_PSY_PROP_TYPES;
if (!props)
return;
if (force_load_psy_ext)
goto load_psy_ext;
/* Deconflict ideapad_laptop driver */
ret = acpi_get_devices(ideapad_hid, lwmi_acpi_match, &handle, NULL);
if (ret)
return;
if (handle && acpi_has_method(handle, "GBMD") && acpi_has_method(handle, "SBMC")) {
dev_dbg(&priv->wdev->dev, "ideapad_laptop driver manages battery for device\n");
return;
}
load_psy_ext:
/* Add battery hooks */
priv->battery_ext = lwmi_psy_exts[props];
priv->battery_hook.add_battery = lwmi_add_battery;
priv->battery_hook.remove_battery = lwmi_remove_battery;
priv->battery_hook.name = "Lenovo WMI Other Battery Extension";
priv->bh_registered = true;
battery_hook_register(&priv->battery_hook);
}
/**
* lwmi_om_psy_remove() - Unregister battery hook
* @priv: Driver private data
*
* Unregisters the battery hook if applicable.
*/
static void lwmi_om_psy_remove(struct lwmi_om_priv *priv)
{
if (!priv->bh_registered)
return;
battery_hook_unregister(&priv->battery_hook);
priv->bh_registered = false;
}
/* ======== fw_attributes (component: lenovo-wmi-capdata 01) ======== */
struct tunable_attr_01 {
struct device *dev;
u8 feature_id;
u8 device_id;
u8 type_id;
u8 cd_mode_id; /* mode arg for searching capdata */
u8 cv_mode_id; /* mode arg for set/get current_value */
};
/**
* tunable_attr_01_id() - Formats a tunable_attr_01 to a capdata attribute ID
* @attr: The tunable_attr_01 to format.
* @mode: The u8 corresponding to the wmi-gamezone mode for set/get.
*
* Return: encoded capability data attribute ID.
*/
static u32 tunable_attr_01_id(struct tunable_attr_01 *attr, u8 mode)
{
return lwmi_attr_id(attr->device_id, attr->feature_id, mode, attr->type_id);
}
static struct tunable_attr_01 ppt_pl1_spl = {
.device_id = LWMI_DEVICE_ID_CPU,
.feature_id = LWMI_FEATURE_ID_CPU_SPL,
.type_id = LWMI_TYPE_ID_NONE,
};
static struct tunable_attr_01 ppt_pl1_spl_cl = {
.device_id = LWMI_DEVICE_ID_CPU,
.feature_id = LWMI_FEATURE_ID_CPU_SPL,
.type_id = LWMI_TYPE_ID_CROSSLOAD,
};
static struct tunable_attr_01 ppt_pl2_sppt = {
.device_id = LWMI_DEVICE_ID_CPU,
.feature_id = LWMI_FEATURE_ID_CPU_SPPT,
.type_id = LWMI_TYPE_ID_NONE,
};
static struct tunable_attr_01 ppt_pl2_sppt_cl = {
.device_id = LWMI_DEVICE_ID_CPU,
.feature_id = LWMI_FEATURE_ID_CPU_SPPT,
.type_id = LWMI_TYPE_ID_CROSSLOAD,
};
static struct tunable_attr_01 ppt_pl3_fppt = {
.device_id = LWMI_DEVICE_ID_CPU,
.feature_id = LWMI_FEATURE_ID_CPU_FPPT,
.type_id = LWMI_TYPE_ID_NONE,
};
static struct tunable_attr_01 ppt_pl3_fppt_cl = {
.device_id = LWMI_DEVICE_ID_CPU,
.feature_id = LWMI_FEATURE_ID_CPU_FPPT,
.type_id = LWMI_TYPE_ID_CROSSLOAD,
};
static struct tunable_attr_01 cpu_temp = {
.device_id = LWMI_DEVICE_ID_CPU,
.feature_id = LWMI_FEATURE_ID_CPU_TEMP,
.type_id = LWMI_TYPE_ID_NONE,
};
static struct tunable_attr_01 ppt_pl1_apu_spl = {
.device_id = LWMI_DEVICE_ID_CPU,
.feature_id = LWMI_FEATURE_ID_CPU_APU,
.type_id = LWMI_TYPE_ID_NONE,
};
static struct tunable_attr_01 ppt_cpu_cl = {
.device_id = LWMI_DEVICE_ID_CPU,
.feature_id = LWMI_FEATURE_ID_CPU_CL,
.type_id = LWMI_TYPE_ID_NONE,
};
static struct tunable_attr_01 ppt_pl1_tau = {
.device_id = LWMI_DEVICE_ID_CPU,
.feature_id = LWMI_FEATURE_ID_CPU_TAU,
.type_id = LWMI_TYPE_ID_NONE,
};
static struct tunable_attr_01 ppt_pl4_ipl = {
.device_id = LWMI_DEVICE_ID_CPU,
.feature_id = LWMI_FEATURE_ID_CPU_IPL,
.type_id = LWMI_TYPE_ID_NONE,
};
static struct tunable_attr_01 ppt_pl4_ipl_cl = {
.device_id = LWMI_DEVICE_ID_CPU,
.feature_id = LWMI_FEATURE_ID_CPU_IPL,
.type_id = LWMI_TYPE_ID_CROSSLOAD,
};
static struct tunable_attr_01 gpu_nv_ppab = {
.device_id = LWMI_DEVICE_ID_GPU,
.feature_id = LWMI_FEATURE_ID_GPU_NV_PPAB,
.type_id = LWMI_TYPE_ID_NONE,
};
static struct tunable_attr_01 gpu_nv_ctgp = {
.device_id = LWMI_DEVICE_ID_GPU,
.feature_id = LWMI_FEATURE_ID_GPU_NV_CTGP,
.type_id = LWMI_TYPE_ID_NONE,
};
static struct tunable_attr_01 gpu_temp = {
.device_id = LWMI_DEVICE_ID_GPU,
.feature_id = LWMI_FEATURE_ID_GPU_TEMP,
.type_id = LWMI_TYPE_ID_NONE,
};
static struct tunable_attr_01 gpu_nv_ac_offset = {
.device_id = LWMI_DEVICE_ID_GPU,
.feature_id = LWMI_FEATURE_ID_GPU_AC_OFFSET,
.type_id = LWMI_TYPE_ID_NONE,
};
static struct tunable_attr_01 dgpu_boost_clk = {
.device_id = LWMI_DEVICE_ID_GPU,
.feature_id = LWMI_FEATURE_ID_DGPU_BOOST_CLK,
.type_id = LWMI_TYPE_ID_NONE,
};
static struct tunable_attr_01 dgpu_enable = {
.device_id = LWMI_DEVICE_ID_GPU,
.feature_id = LWMI_FEATURE_ID_DGPU_EN,
.type_id = LWMI_TYPE_ID_NONE,
};
static struct tunable_attr_01 gpu_mode = {
.device_id = LWMI_DEVICE_ID_GPU,
.feature_id = LWMI_FEATURE_ID_GPU_MODE,
.type_id = LWMI_TYPE_ID_NONE,
};
static struct tunable_attr_01 dgpu_didvid = {
.device_id = LWMI_DEVICE_ID_GPU,
.feature_id = LWMI_FEATURE_ID_DGPU_DIDVID,
.type_id = LWMI_TYPE_ID_NONE,
};
static struct tunable_attr_01 gpu_nv_bpl = {
.device_id = LWMI_DEVICE_ID_GPU,
.feature_id = LWMI_FEATURE_ID_GPU_NV_BPL,
.type_id = LWMI_TYPE_ID_NONE,
};
static struct tunable_attr_01 gpu_nv_cpu_boost = {
.device_id = LWMI_DEVICE_ID_GPU,
.feature_id = LWMI_FEATURE_ID_GPU_NV_CPU_BOOST,
.type_id = LWMI_TYPE_ID_NONE,
};
struct capdata01_attr_group {
const struct attribute_group *attr_group;
struct tunable_attr_01 *tunable_attr;
};
/* Attribute Methods */
/**
* int_type_show() - Emit the data type for an integer attribute
* @kobj: Pointer to the driver object.
* @kattr: Pointer to the attribute calling this function.
* @buf: The buffer to write to.
*
* Return: Number of characters written to buf.
*/
static ssize_t int_type_show(struct kobject *kobj, struct kobj_attribute *kattr,
char *buf)
{
return sysfs_emit(buf, "integer\n");
}
/**
* attr_capdata01_show() - Get the value of the specified attribute property
*
* @kobj: Pointer to the driver object.
* @kattr: Pointer to the attribute calling this function.
* @buf: The buffer to write to.
* @tunable_attr: The attribute to be read.
* @prop: The property of this attribute to be read.
*
* Retrieves the given property from the capability data 01 struct for the
* specified attribute's "custom" thermal mode. This function is intended
* to be generic so it can be called from any integer attributes "_show"
* function.
*
* If the WMI is success the sysfs attribute is notified.
*
* Return: Either number of characters written to buf, or an error code.
*/
static ssize_t attr_capdata01_show(struct kobject *kobj,
struct kobj_attribute *kattr, char *buf,
struct tunable_attr_01 *tunable_attr,
enum attribute_property prop)
{
struct lwmi_om_priv *priv = dev_get_drvdata(tunable_attr->dev);
struct capdata01 capdata;
u32 attribute_id;
int value, ret;
attribute_id = tunable_attr_01_id(tunable_attr, tunable_attr->cd_mode_id);
ret = lwmi_cd01_get_data(priv->cd01_list, attribute_id, &capdata);
if (ret)
return ret;
switch (prop) {
case DEFAULT_VAL:
value = capdata.default_value;
break;
case MAX_VAL:
value = capdata.max_value;
break;
case MIN_VAL:
value = capdata.min_value;
break;
case STEP_VAL:
value = capdata.step;
break;
default:
return -EINVAL;
}
return sysfs_emit(buf, "%d\n", value);
}
/**
* attr_current_value_store() - Set the current value of the given attribute
* @kobj: Pointer to the driver object.
* @kattr: Pointer to the attribute calling this function.
* @buf: The buffer to read from, this is parsed to `int` type.
* @count: Required by sysfs attribute macros, pass in from the callee attr.
* @tunable_attr: The attribute to be stored.
*
* Sets the value of the given attribute when operating under the "custom"
* smartfan profile. The current smartfan profile is retrieved from the
* lenovo-wmi-gamezone driver and error is returned if the result is not
* "custom". This function is intended to be generic so it can be called from
* any integer attribute's "_store" function. The integer to be sent to the WMI
* method is range checked and an error code is returned if out of range.
*
* If the value is valid and WMI is success, then the sysfs attribute is
* notified.
*
* Return: Either count, or an error code.
*/
static ssize_t attr_current_value_store(struct kobject *kobj,
struct kobj_attribute *kattr,
const char *buf, size_t count,
struct tunable_attr_01 *tunable_attr)
{
struct lwmi_om_priv *priv = dev_get_drvdata(tunable_attr->dev);
struct wmi_method_args_32 args = {};
struct capdata01 capdata;
enum thermal_mode mode;
u32 value;
int ret;
ret = lwmi_tm_notifier_call(&mode);
if (ret)
return ret;
if (mode != LWMI_GZ_THERMAL_MODE_CUSTOM)
return -EBUSY;
args.arg0 = tunable_attr_01_id(tunable_attr, tunable_attr->cd_mode_id);
ret = lwmi_cd01_get_data(priv->cd01_list, args.arg0, &capdata);
if (ret)
return ret;
ret = kstrtouint(buf, 10, &value);
if (ret)
return ret;
if (value < capdata.min_value || value > capdata.max_value)
return -EINVAL;
args.arg0 = tunable_attr_01_id(tunable_attr, tunable_attr->cv_mode_id);
args.arg1 = value;
ret = lwmi_dev_evaluate_int(priv->wdev, 0x0, LWMI_FEATURE_VALUE_SET,
(unsigned char *)&args, sizeof(args), NULL);
if (ret)
return ret;
return count;
};
/**
* attr_current_value_show() - Get the current value of the given attribute
* @kobj: Pointer to the driver object.
* @kattr: Pointer to the attribute calling this function.
* @buf: The buffer to write to.
* @tunable_attr: The attribute to be read.
*
* Retrieves the value of the given attribute for the current smartfan profile.
* The current smartfan profile is retrieved from the lenovo-wmi-gamezone driver.
* This function is intended to be generic so it can be called from any integer
* attribute's "_show" function.
*
* If the WMI is success the sysfs attribute is notified.
*
* Return: Either number of characters written to buf, or an error code.
*/
static ssize_t attr_current_value_show(struct kobject *kobj,
struct kobj_attribute *kattr, char *buf,
struct tunable_attr_01 *tunable_attr)
{
struct lwmi_om_priv *priv = dev_get_drvdata(tunable_attr->dev);
struct wmi_method_args_32 args = {};
enum thermal_mode mode;
int retval;
int ret;
ret = lwmi_tm_notifier_call(&mode);
if (ret)
return ret;
/* If "no-mode" is the supported mode, ensure we never send current mode */
if (tunable_attr->cv_mode_id == LWMI_GZ_THERMAL_MODE_NONE)
mode = tunable_attr->cv_mode_id;
args.arg0 = tunable_attr_01_id(tunable_attr, mode);
ret = lwmi_dev_evaluate_int(priv->wdev, 0x0, LWMI_FEATURE_VALUE_GET,
(unsigned char *)&args, sizeof(args),
&retval);
if (ret)
return ret;
return sysfs_emit(buf, "%d\n", retval);
}
/**
* lwmi_attr_01_is_supported() - Determine if the given attribute is supported.
* @tunable_attr: The attribute to verify.
*
* For an attribute to be supported it must have a functional get/set method,
* as well as associated capability data stored in the capdata01 table.
*
* First check if the attribute has a corresponding data table under custom mode
* (0xff), then under no mode (0x00). If either of those passes, check if the
* supported field of the capdata struct is > 0. If it is supported, store the
* successful mode in the cd_mode_id field of tunable_attr.
*
* If the attribute capdata shows it is supported, attempt to determine the mode
* for the current value property get/set methods using a similar pattern to the
* capdata table check. If the value returned by either mode is 0 or an error,
* assume that mode is not supported. Otherwise, store the successful mode in the
* cv_mode_id field of tunable_attr.
*
* If any of the above checks fail then the attribute is not fully supported.
*
* Return: true if capdata and set/get modes are found, otherwise false.
*/
static bool lwmi_attr_01_is_supported(struct tunable_attr_01 *tunable_attr)
{
u8 modes[2] = { LWMI_GZ_THERMAL_MODE_CUSTOM, LWMI_GZ_THERMAL_MODE_NONE };
struct lwmi_om_priv *priv = dev_get_drvdata(tunable_attr->dev);
struct wmi_method_args_32 args = {};
bool cd_mode_found = false;
bool cv_mode_found = false;
struct capdata01 capdata;
int retval, ret, i;
/* Determine tunable_attr->cd_mode_id */
for (i = 0; i < ARRAY_SIZE(modes); i++) {
args.arg0 = tunable_attr_01_id(tunable_attr, modes[i]);
ret = lwmi_cd01_get_data(priv->cd01_list, args.arg0, &capdata);
if (ret || !capdata.supported)
continue;
tunable_attr->cd_mode_id = modes[i];
cd_mode_found = true;
break;
}
if (!cd_mode_found)
return cd_mode_found;
dev_dbg(tunable_attr->dev,
"cd_mode_id: %#010x\n", args.arg0);
/* Determine tunable_attr->cv_mode_id, returns 1 if supported */
for (i = 0; i < ARRAY_SIZE(modes); i++) {
args.arg0 = tunable_attr_01_id(tunable_attr, modes[i]);
ret = lwmi_dev_evaluate_int(priv->wdev, 0x0, LWMI_FEATURE_VALUE_GET,
(u8 *)&args, sizeof(args),
&retval);
if (ret || !retval)
continue;
tunable_attr->cv_mode_id = modes[i];
cv_mode_found = true;
break;
}
if (!cv_mode_found)
return cv_mode_found;
dev_dbg(tunable_attr->dev, "cv_mode_id: %#010x, attribute support level: %#010x\n",
args.arg0, capdata.supported);
return capdata.supported > 0;
}
/* Lenovo WMI Other Mode Attribute macros */
#define __LWMI_ATTR_RO(_func, _name) \
{ \
.attr = { .name = __stringify(_name), .mode = 0444 }, \
.show = _func##_##_name##_show, \
}
#define __LWMI_ATTR_RO_AS(_name, _show) \
{ \
.attr = { .name = __stringify(_name), .mode = 0444 }, \
.show = _show, \
}
#define __LWMI_ATTR_RW(_func, _name) \
__ATTR(_name, 0644, _func##_##_name##_show, _func##_##_name##_store)
/* Shows a formatted static variable */
#define __LWMI_ATTR_SHOW_FMT(_prop, _attrname, _fmt, _val) \
static ssize_t _attrname##_##_prop##_show( \
struct kobject *kobj, struct kobj_attribute *kattr, char *buf) \
{ \
return sysfs_emit(buf, _fmt, _val); \
} \
static struct kobj_attribute attr_##_attrname##_##_prop = \
__LWMI_ATTR_RO(_attrname, _prop)
/* Attribute current value read/write */
#define __LWMI_TUNABLE_CURRENT_VALUE_CAP01(_attrname) \
static ssize_t _attrname##_current_value_store( \
struct kobject *kobj, struct kobj_attribute *kattr, \
const char *buf, size_t count) \
{ \
return attr_current_value_store(kobj, kattr, buf, count, \
&_attrname); \
} \
static ssize_t _attrname##_current_value_show( \
struct kobject *kobj, struct kobj_attribute *kattr, char *buf) \
{ \
return attr_current_value_show(kobj, kattr, buf, &_attrname); \
} \
static struct kobj_attribute attr_##_attrname##_current_value = \
__LWMI_ATTR_RW(_attrname, current_value)
/* Attribute property read only */
#define __LWMI_TUNABLE_RO_CAP01(_prop, _attrname, _prop_type) \
static ssize_t _attrname##_##_prop##_show( \
struct kobject *kobj, struct kobj_attribute *kattr, char *buf) \
{ \
return attr_capdata01_show(kobj, kattr, buf, &_attrname, \
_prop_type); \
} \
static struct kobj_attribute attr_##_attrname##_##_prop = \
__LWMI_ATTR_RO(_attrname, _prop)
#define LWMI_ATTR_GROUP_TUNABLE_CAP01(_attrname, _fsname, _dispname) \
__LWMI_TUNABLE_CURRENT_VALUE_CAP01(_attrname); \
__LWMI_TUNABLE_RO_CAP01(default_value, _attrname, DEFAULT_VAL); \
__LWMI_ATTR_SHOW_FMT(display_name, _attrname, "%s\n", _dispname); \
__LWMI_TUNABLE_RO_CAP01(max_value, _attrname, MAX_VAL); \
__LWMI_TUNABLE_RO_CAP01(min_value, _attrname, MIN_VAL); \
__LWMI_TUNABLE_RO_CAP01(scalar_increment, _attrname, STEP_VAL); \
static struct kobj_attribute attr_##_attrname##_type = \
__LWMI_ATTR_RO_AS(type, int_type_show); \
static struct attribute *_attrname##_attrs[] = { \
&attr_##_attrname##_current_value.attr, \
&attr_##_attrname##_default_value.attr, \
&attr_##_attrname##_display_name.attr, \
&attr_##_attrname##_max_value.attr, \
&attr_##_attrname##_min_value.attr, \
&attr_##_attrname##_scalar_increment.attr, \
&attr_##_attrname##_type.attr, \
NULL, \
}; \
static const struct attribute_group _attrname##_attr_group = { \
.name = _fsname, .attrs = _attrname##_attrs \
}
/* CPU tunable attributes */
LWMI_ATTR_GROUP_TUNABLE_CAP01(cpu_temp, "cpu_temp",
"Set the CPU thermal load limit");
LWMI_ATTR_GROUP_TUNABLE_CAP01(ppt_cpu_cl, "ppt_cpu_cl",
"Set the CPU cross loading power limit");
LWMI_ATTR_GROUP_TUNABLE_CAP01(ppt_pl1_apu_spl, "ppt_pl1_apu_spl",
"Set the APU sustained power limit");
LWMI_ATTR_GROUP_TUNABLE_CAP01(ppt_pl1_spl, "ppt_pl1_spl",
"Set the CPU sustained power limit");
LWMI_ATTR_GROUP_TUNABLE_CAP01(ppt_pl1_spl_cl, "ppt_pl1_spl_cl",
"Set the CPU cross loading sustained power limit");
LWMI_ATTR_GROUP_TUNABLE_CAP01(ppt_pl2_sppt, "ppt_pl2_sppt",
"Set the CPU slow package power tracking limit");
LWMI_ATTR_GROUP_TUNABLE_CAP01(ppt_pl2_sppt_cl, "ppt_pl2_sppt_cl",
"Set the CPU cross loading slow package power tracking limit");
LWMI_ATTR_GROUP_TUNABLE_CAP01(ppt_pl3_fppt, "ppt_pl3_fppt",
"Set the CPU fast package power tracking limit");
LWMI_ATTR_GROUP_TUNABLE_CAP01(ppt_pl3_fppt_cl, "ppt_pl3_fppt_cl",
"Set the CPU cross loading fast package power tracking limit");
LWMI_ATTR_GROUP_TUNABLE_CAP01(ppt_pl1_tau, "ppt_pl1_tau",
"Set the CPU sustained power limit exceed duration");
LWMI_ATTR_GROUP_TUNABLE_CAP01(ppt_pl4_ipl, "ppt_pl4_ipl",
"Set the CPU instantaneous power limit");
LWMI_ATTR_GROUP_TUNABLE_CAP01(ppt_pl4_ipl_cl, "ppt_pl4_ipl_cl",
"Set the CPU cross loading instantaneous power limit");
/* GPU tunable attributes */
LWMI_ATTR_GROUP_TUNABLE_CAP01(dgpu_boost_clk, "dgpu_boost_clk",
"Set the dedicated GPU boost clock");
LWMI_ATTR_GROUP_TUNABLE_CAP01(dgpu_didvid, "dgpu_didvid",
"Get the GPU device identifier and vendor identifier");
LWMI_ATTR_GROUP_TUNABLE_CAP01(dgpu_enable, "dgpu_enable",
"Set the dedicated Nvidia GPU enabled status");
LWMI_ATTR_GROUP_TUNABLE_CAP01(gpu_mode, "gpu_mode",
"Set the GPU mode by power limit");
LWMI_ATTR_GROUP_TUNABLE_CAP01(gpu_nv_ac_offset, "gpu_nv_ac_offset",
"Set the Nvidia GPU AC total processing power baseline offset");
LWMI_ATTR_GROUP_TUNABLE_CAP01(gpu_nv_bpl, "gpu_nv_bpl",
"Set the Nvidia GPU base power limit");
LWMI_ATTR_GROUP_TUNABLE_CAP01(gpu_nv_cpu_boost, "gpu_nv_cpu_boost",
"Set the Nvidia GPU to CPU dynamic boost limit");
LWMI_ATTR_GROUP_TUNABLE_CAP01(gpu_nv_ctgp, "gpu_nv_ctgp",
"Set the GPU configurable total graphics power");
LWMI_ATTR_GROUP_TUNABLE_CAP01(gpu_nv_ppab, "gpu_nv_ppab",
"Set the Nvidia GPU power performance aware boost limit");
LWMI_ATTR_GROUP_TUNABLE_CAP01(gpu_temp, "gpu_temp",
"Set the GPU thermal load limit");
static struct capdata01_attr_group cd01_attr_groups[] = {
{ &cpu_temp_attr_group, &cpu_temp },
{ &dgpu_boost_clk_attr_group, &dgpu_boost_clk },
{ &dgpu_didvid_attr_group, &dgpu_didvid },
{ &dgpu_enable_attr_group, &dgpu_enable },
{ &gpu_mode_attr_group, &gpu_mode },
{ &gpu_nv_ac_offset_attr_group, &gpu_nv_ac_offset },
{ &gpu_nv_bpl_attr_group, &gpu_nv_bpl },
{ &gpu_nv_cpu_boost_attr_group, &gpu_nv_cpu_boost },
{ &gpu_nv_ctgp_attr_group, &gpu_nv_ctgp },
{ &gpu_nv_ppab_attr_group, &gpu_nv_ppab },
{ &gpu_temp_attr_group, &gpu_temp },
{ &ppt_cpu_cl_attr_group, &ppt_cpu_cl },
{ &ppt_pl1_apu_spl_attr_group, &ppt_pl1_apu_spl },
{ &ppt_pl1_spl_attr_group, &ppt_pl1_spl },
{ &ppt_pl1_spl_cl_attr_group, &ppt_pl1_spl_cl },
{ &ppt_pl1_tau_attr_group, &ppt_pl1_tau },
{ &ppt_pl2_sppt_attr_group, &ppt_pl2_sppt },
{ &ppt_pl2_sppt_cl_attr_group, &ppt_pl2_sppt_cl },
{ &ppt_pl3_fppt_attr_group, &ppt_pl3_fppt },
{ &ppt_pl3_fppt_cl_attr_group, &ppt_pl3_fppt_cl },
{ &ppt_pl4_ipl_attr_group, &ppt_pl4_ipl },
{ &ppt_pl4_ipl_cl_attr_group, &ppt_pl4_ipl_cl },
{},
};
/**
* lwmi_om_fw_attr_add() - Register all firmware_attributes_class members
* @priv: The Other Mode driver data.
*/
static void lwmi_om_fw_attr_add(struct lwmi_om_priv *priv)
{
unsigned int i;
int err;
err = ida_alloc(&lwmi_om_ida, GFP_KERNEL);
if (err < 0)
goto err_no_ida;
priv->ida_id = err;
priv->fw_attr_dev = device_create(&firmware_attributes_class, NULL,
MKDEV(0, 0), NULL, "%s-%u",
LWMI_OM_SYSFS_NAME, priv->ida_id);
if (IS_ERR(priv->fw_attr_dev)) {
err = PTR_ERR(priv->fw_attr_dev);
goto err_free_ida;
}
priv->fw_attr_kset = kset_create_and_add("attributes", NULL,
&priv->fw_attr_dev->kobj);
if (!priv->fw_attr_kset) {
err = -ENOMEM;
goto err_destroy_classdev;
}
for (i = 0; i < ARRAY_SIZE(cd01_attr_groups) - 1; i++) {
cd01_attr_groups[i].tunable_attr->dev = &priv->wdev->dev;
if (!lwmi_attr_01_is_supported(cd01_attr_groups[i].tunable_attr))
continue;
err = sysfs_create_group(&priv->fw_attr_kset->kobj,
cd01_attr_groups[i].attr_group);
if (err)
goto err_remove_groups;
}
return;
err_remove_groups:
while (i--)
sysfs_remove_group(&priv->fw_attr_kset->kobj,
cd01_attr_groups[i].attr_group);
kset_unregister(priv->fw_attr_kset);
err_destroy_classdev:
device_unregister(priv->fw_attr_dev);
err_free_ida:
ida_free(&lwmi_om_ida, priv->ida_id);
err_no_ida:
priv->ida_id = -EIDRM;
dev_warn(&priv->wdev->dev,
"failed to register firmware-attributes device: %d\n", err);
}
/**
* lwmi_om_fw_attr_remove() - Unregister all capability data attribute groups
* @priv: the lenovo-wmi-other driver data.
*/
static void lwmi_om_fw_attr_remove(struct lwmi_om_priv *priv)
{
if (priv->ida_id < 0)
return;
for (unsigned int i = 0; i < ARRAY_SIZE(cd01_attr_groups) - 1; i++)
sysfs_remove_group(&priv->fw_attr_kset->kobj,
cd01_attr_groups[i].attr_group);
kset_unregister(priv->fw_attr_kset);
device_unregister(priv->fw_attr_dev);
ida_free(&lwmi_om_ida, priv->ida_id);
priv->ida_id = -EIDRM;
}
/* ======== Self (master: lenovo-wmi-other) ======== */
/**
* lwmi_om_master_bind() - Bind all components of the other mode driver
* @dev: The lenovo-wmi-other driver basic device.
*
* Call component_bind_all to bind the lenovo-wmi-capdata devices to the
* lenovo-wmi-other master driver, with a callback to collect fan info from
* capdata_fan. On success, assign the capability data list pointers to the
* driver data struct for later access. These pointers are only valid while the
* capdata interfaces exist. Finally, collect fan info from capdata00 and
* register all firmware attribute groups. Note that the HWMON device is
* registered only if all fan info is collected. Hence, it is not registered
* here. See lwmi_om_fan_info_collect_cd00() and
* lwmi_om_fan_info_collect_cd_fan().
*
* Return: 0 on success, or an error code.
*/
static int lwmi_om_master_bind(struct device *dev)
{
struct lwmi_om_priv *priv = dev_get_drvdata(dev);
struct lwmi_cd_binder binder = {
.cd_fan_list_cb = lwmi_om_fan_info_collect_cd_fan,
};
int ret;
lwmi_om_fan_info_init(priv);
ret = component_bind_all(dev, &binder);
if (ret)
return ret;
priv->cd00_list = binder.cd00_list;
priv->cd01_list = binder.cd01_list;
if (!priv->cd00_list || !priv->cd01_list) {
component_unbind_all(dev, NULL);
return -ENODEV;
}
lwmi_om_fan_info_collect_cd00(priv);
lwmi_om_psy_ext_init(priv);
lwmi_om_fw_attr_add(priv);
return 0;
}
/**
* lwmi_om_master_unbind() - Unbind all components of the other mode driver
* @dev: The lenovo-wmi-other driver basic device
*
* Unregister all firmware attribute groups and the HWMON device. Then call
* component_unbind_all to unbind lenovo-wmi-capdata devices from the
* lenovo-wmi-other master driver.
*/
static void lwmi_om_master_unbind(struct device *dev)
{
struct lwmi_om_priv *priv = dev_get_drvdata(dev);
lwmi_om_fw_attr_remove(priv);
lwmi_om_hwmon_remove(priv);
lwmi_om_psy_remove(priv);
component_unbind_all(dev, NULL);
}
static const struct component_master_ops lwmi_om_master_ops = {
.bind = lwmi_om_master_bind,
.unbind = lwmi_om_master_unbind,
};
static int lwmi_other_probe(struct wmi_device *wdev, const void *context)
{
struct component_match *master_match = NULL;
struct lwmi_om_priv *priv;
priv = devm_kzalloc(&wdev->dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
/* Sentinel for on-demand ida_free(). */
priv->ida_id = -EIDRM;
priv->wdev = wdev;
dev_set_drvdata(&wdev->dev, priv);
lwmi_cd_match_add_all(&wdev->dev, &master_match);
if (IS_ERR(master_match))
return PTR_ERR(master_match);
return component_master_add_with_match(&wdev->dev, &lwmi_om_master_ops,
master_match);
}
static void lwmi_other_remove(struct wmi_device *wdev)
{
component_master_del(&wdev->dev, &lwmi_om_master_ops);
}
static const struct wmi_device_id lwmi_other_id_table[] = {
{ LENOVO_OTHER_MODE_GUID, NULL },
{}
};
static struct wmi_driver lwmi_other_driver = {
.driver = {
.name = "lenovo_wmi_other",
.probe_type = PROBE_PREFER_ASYNCHRONOUS,
},
.id_table = lwmi_other_id_table,
.probe = lwmi_other_probe,
.remove = lwmi_other_remove,
.no_singleton = true,
};
module_wmi_driver(lwmi_other_driver);
MODULE_IMPORT_NS("LENOVO_WMI_CAPDATA");
MODULE_IMPORT_NS("LENOVO_WMI_HELPERS");
MODULE_DEVICE_TABLE(wmi, lwmi_other_id_table);
MODULE_AUTHOR("Derek J. Clark <derekjohn.clark@gmail.com>");
MODULE_AUTHOR("Rong Zhang <i@rong.moe>");
MODULE_DESCRIPTION("Lenovo Other Mode WMI Driver");
MODULE_LICENSE("GPL");
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