Merge branches 'acpi-tad', 'acpi-fan', 'acpi-dptf' and 'acpi-tools'

Merge updates of the ACPI time and alarm device (TAD) driver, ACPI fan
driver, ACPI DPTF code and an ACPI utility update for 6.19-rc1:

 - Improve runtime PM in the ACPI time and alarm device (TAD) driver
   using guard macros and rearrange code related to runtime PM in
   acpi_tad_remove() (Rafael Wysocki)

 - Add support for Microsoft fan extensions to the ACPI fan driver along
   with notification support and work around a 64-bit firmware bug in
   that driver (Armin Wolf)

 - Use ACPI_FREE() to free ACPI buffer in the ACPI DPTF code (Kaushlendra
   Kumar)

 - Fix a memory leak and a resource leak in the ACPI pfrut utility (Malaya
   Kumar Rout)

* acpi-tad:
  ACPI: TAD: Improve runtime PM using guard macros
  ACPI: TAD: Rearrange runtime PM operations in acpi_tad_remove()

* acpi-fan:
  ACPI: fan: Add support for Microsoft fan extensions
  ACPI: fan: Add hwmon notification support
  ACPI: fan: Add basic notification support
  ACPI: fan: Workaround for 64-bit firmware bug

* acpi-dptf:
  ACPI: DPTF: Use ACPI_FREE() for ACPI buffer deallocation

* acpi-tools:
  ACPI: tools: pfrut: fix memory leak and resource leak in pfrut.c
This commit is contained in:
Rafael J. Wysocki 2025-11-28 15:01:07 +01:00
6 changed files with 321 additions and 49 deletions

View File

@ -90,19 +90,18 @@ static int acpi_tad_set_real_time(struct device *dev, struct acpi_tad_rt *rt)
args[0].buffer.pointer = (u8 *)rt;
args[0].buffer.length = sizeof(*rt);
pm_runtime_get_sync(dev);
ACQUIRE(pm_runtime_active_try, pm)(dev);
if (ACQUIRE_ERR(pm_runtime_active_try, &pm))
return -ENXIO;
status = acpi_evaluate_integer(handle, "_SRT", &arg_list, &retval);
pm_runtime_put_sync(dev);
if (ACPI_FAILURE(status) || retval)
return -EIO;
return 0;
}
static int acpi_tad_get_real_time(struct device *dev, struct acpi_tad_rt *rt)
static int acpi_tad_evaluate_grt(struct device *dev, struct acpi_tad_rt *rt)
{
acpi_handle handle = ACPI_HANDLE(dev);
struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER };
@ -111,12 +110,7 @@ static int acpi_tad_get_real_time(struct device *dev, struct acpi_tad_rt *rt)
acpi_status status;
int ret = -EIO;
pm_runtime_get_sync(dev);
status = acpi_evaluate_object(handle, "_GRT", NULL, &output);
pm_runtime_put_sync(dev);
if (ACPI_FAILURE(status))
goto out_free;
@ -139,6 +133,21 @@ static int acpi_tad_get_real_time(struct device *dev, struct acpi_tad_rt *rt)
return ret;
}
static int acpi_tad_get_real_time(struct device *dev, struct acpi_tad_rt *rt)
{
int ret;
ACQUIRE(pm_runtime_active_try, pm)(dev);
if (ACQUIRE_ERR(pm_runtime_active_try, &pm))
return -ENXIO;
ret = acpi_tad_evaluate_grt(dev, rt);
if (ret)
return ret;
return 0;
}
static char *acpi_tad_rt_next_field(char *s, int *val)
{
char *p;
@ -266,12 +275,11 @@ static int acpi_tad_wake_set(struct device *dev, char *method, u32 timer_id,
args[0].integer.value = timer_id;
args[1].integer.value = value;
pm_runtime_get_sync(dev);
ACQUIRE(pm_runtime_active_try, pm)(dev);
if (ACQUIRE_ERR(pm_runtime_active_try, &pm))
return -ENXIO;
status = acpi_evaluate_integer(handle, method, &arg_list, &retval);
pm_runtime_put_sync(dev);
if (ACPI_FAILURE(status) || retval)
return -EIO;
@ -314,12 +322,11 @@ static ssize_t acpi_tad_wake_read(struct device *dev, char *buf, char *method,
args[0].integer.value = timer_id;
pm_runtime_get_sync(dev);
ACQUIRE(pm_runtime_active_try, pm)(dev);
if (ACQUIRE_ERR(pm_runtime_active_try, &pm))
return -ENXIO;
status = acpi_evaluate_integer(handle, method, &arg_list, &retval);
pm_runtime_put_sync(dev);
if (ACPI_FAILURE(status))
return -EIO;
@ -370,12 +377,11 @@ static int acpi_tad_clear_status(struct device *dev, u32 timer_id)
args[0].integer.value = timer_id;
pm_runtime_get_sync(dev);
ACQUIRE(pm_runtime_active_try, pm)(dev);
if (ACQUIRE_ERR(pm_runtime_active_try, &pm))
return -ENXIO;
status = acpi_evaluate_integer(handle, "_CWS", &arg_list, &retval);
pm_runtime_put_sync(dev);
if (ACPI_FAILURE(status) || retval)
return -EIO;
@ -411,12 +417,11 @@ static ssize_t acpi_tad_status_read(struct device *dev, char *buf, u32 timer_id)
args[0].integer.value = timer_id;
pm_runtime_get_sync(dev);
ACQUIRE(pm_runtime_active_try, pm)(dev);
if (ACQUIRE_ERR(pm_runtime_active_try, &pm))
return -ENXIO;
status = acpi_evaluate_integer(handle, "_GWS", &arg_list, &retval);
pm_runtime_put_sync(dev);
if (ACPI_FAILURE(status))
return -EIO;
@ -563,8 +568,6 @@ static void acpi_tad_remove(struct platform_device *pdev)
device_init_wakeup(dev, false);
pm_runtime_get_sync(dev);
if (dd->capabilities & ACPI_TAD_RT)
sysfs_remove_group(&dev->kobj, &acpi_tad_time_attr_group);
@ -573,14 +576,16 @@ static void acpi_tad_remove(struct platform_device *pdev)
sysfs_remove_group(&dev->kobj, &acpi_tad_attr_group);
scoped_guard(pm_runtime_noresume, dev) {
acpi_tad_disable_timer(dev, ACPI_TAD_AC_TIMER);
acpi_tad_clear_status(dev, ACPI_TAD_AC_TIMER);
if (dd->capabilities & ACPI_TAD_DC_WAKE) {
acpi_tad_disable_timer(dev, ACPI_TAD_DC_TIMER);
acpi_tad_clear_status(dev, ACPI_TAD_DC_TIMER);
}
}
pm_runtime_put_sync(dev);
pm_runtime_suspend(dev);
pm_runtime_disable(dev);
acpi_remove_cmos_rtc_space_handler(handle);
}

View File

@ -41,7 +41,7 @@ static int pch_fivr_read(acpi_handle handle, char *method, struct pch_fivr_resp
ret = 0;
release_buffer:
kfree(buffer.pointer);
ACPI_FREE(buffer.pointer);
return ret;
}

View File

@ -11,6 +11,7 @@
#define _ACPI_FAN_H_
#include <linux/kconfig.h>
#include <linux/limits.h>
#define ACPI_FAN_DEVICE_IDS \
{"INT3404", }, /* Fan */ \
@ -55,19 +56,58 @@ struct acpi_fan {
struct acpi_fan_fif fif;
struct acpi_fan_fps *fps;
int fps_count;
/* A value of 0 means that trippoint-related functions are not supported */
u32 fan_trip_granularity;
#if IS_REACHABLE(CONFIG_HWMON)
struct device *hdev;
#endif
struct thermal_cooling_device *cdev;
struct device_attribute fst_speed;
struct device_attribute fine_grain_control;
};
/**
* acpi_fan_speed_valid - Check if fan speed value is valid
* @speeed: Speed value returned by the ACPI firmware
*
* Check if the fan speed value returned by the ACPI firmware is valid. This function is
* necessary as ACPI firmware implementations can return 0xFFFFFFFF to signal that the
* ACPI fan does not support speed reporting. Additionally, some buggy ACPI firmware
* implementations return a value larger than the 32-bit integer value defined by
* the ACPI specification when using placeholder values. Such invalid values are also
* detected by this function.
*
* Returns: True if the fan speed value is valid, false otherwise.
*/
static inline bool acpi_fan_speed_valid(u64 speed)
{
return speed < U32_MAX;
}
/**
* acpi_fan_power_valid - Check if fan power value is valid
* @power: Power value returned by the ACPI firmware
*
* Check if the fan power value returned by the ACPI firmware is valid.
* See acpi_fan_speed_valid() for details.
*
* Returns: True if the fan power value is valid, false otherwise.
*/
static inline bool acpi_fan_power_valid(u64 power)
{
return power < U32_MAX;
}
int acpi_fan_get_fst(acpi_handle handle, struct acpi_fan_fst *fst);
int acpi_fan_create_attributes(struct acpi_device *device);
void acpi_fan_delete_attributes(struct acpi_device *device);
#if IS_REACHABLE(CONFIG_HWMON)
int devm_acpi_fan_create_hwmon(struct device *dev);
void acpi_fan_notify_hwmon(struct device *dev);
#else
static inline int devm_acpi_fan_create_hwmon(struct device *dev) { return 0; };
static inline void acpi_fan_notify_hwmon(struct device *dev) { };
#endif
#endif

View File

@ -7,11 +7,16 @@
* Copyright (C) 2022 Intel Corporation. All rights reserved.
*/
#include <linux/bits.h>
#include <linux/kernel.h>
#include <linux/limits.h>
#include <linux/math.h>
#include <linux/math64.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/uaccess.h>
#include <linux/uuid.h>
#include <linux/thermal.h>
#include <linux/acpi.h>
#include <linux/platform_device.h>
@ -19,6 +24,26 @@
#include "fan.h"
#define ACPI_FAN_NOTIFY_STATE_CHANGED 0x80
/*
* Defined inside the "Fan Noise Signal" section at
* https://learn.microsoft.com/en-us/windows-hardware/design/device-experiences/design-guide.
*/
static const guid_t acpi_fan_microsoft_guid = GUID_INIT(0xA7611840, 0x99FE, 0x41AE, 0xA4, 0x88,
0x35, 0xC7, 0x59, 0x26, 0xC8, 0xEB);
#define ACPI_FAN_DSM_GET_TRIP_POINT_GRANULARITY 1
#define ACPI_FAN_DSM_SET_TRIP_POINTS 2
#define ACPI_FAN_DSM_GET_OPERATING_RANGES 3
/*
* Ensures that fans with a very low trip point granularity
* do not send too many notifications.
*/
static uint min_trip_distance = 100;
module_param(min_trip_distance, uint, 0);
MODULE_PARM_DESC(min_trip_distance, "Minimum distance between fan speed trip points in RPM");
static const struct acpi_device_id fan_device_ids[] = {
ACPI_FAN_DEVICE_IDS,
{"", 0},
@ -308,6 +333,182 @@ static int acpi_fan_get_fps(struct acpi_device *device)
return status;
}
static int acpi_fan_dsm_init(struct device *dev)
{
union acpi_object dummy = {
.package = {
.type = ACPI_TYPE_PACKAGE,
.count = 0,
.elements = NULL,
},
};
struct acpi_fan *fan = dev_get_drvdata(dev);
union acpi_object *obj;
int ret = 0;
if (!acpi_check_dsm(fan->handle, &acpi_fan_microsoft_guid, 0,
BIT(ACPI_FAN_DSM_GET_TRIP_POINT_GRANULARITY) |
BIT(ACPI_FAN_DSM_SET_TRIP_POINTS)))
return 0;
dev_info(dev, "Using Microsoft fan extensions\n");
obj = acpi_evaluate_dsm_typed(fan->handle, &acpi_fan_microsoft_guid, 0,
ACPI_FAN_DSM_GET_TRIP_POINT_GRANULARITY, &dummy,
ACPI_TYPE_INTEGER);
if (!obj)
return -EIO;
if (obj->integer.value > U32_MAX)
ret = -EOVERFLOW;
else
fan->fan_trip_granularity = obj->integer.value;
kfree(obj);
return ret;
}
static int acpi_fan_dsm_set_trip_points(struct device *dev, u64 upper, u64 lower)
{
union acpi_object args[2] = {
{
.integer = {
.type = ACPI_TYPE_INTEGER,
.value = lower,
},
},
{
.integer = {
.type = ACPI_TYPE_INTEGER,
.value = upper,
},
},
};
struct acpi_fan *fan = dev_get_drvdata(dev);
union acpi_object in = {
.package = {
.type = ACPI_TYPE_PACKAGE,
.count = ARRAY_SIZE(args),
.elements = args,
},
};
union acpi_object *obj;
obj = acpi_evaluate_dsm(fan->handle, &acpi_fan_microsoft_guid, 0,
ACPI_FAN_DSM_SET_TRIP_POINTS, &in);
kfree(obj);
return 0;
}
static int acpi_fan_dsm_start(struct device *dev)
{
struct acpi_fan *fan = dev_get_drvdata(dev);
int ret;
if (!fan->fan_trip_granularity)
return 0;
/*
* Some firmware implementations only update the values returned by the
* _FST control method when a notification is received. This usually
* works with Microsoft Windows as setting up trip points will keep
* triggering said notifications, but will cause issues when using _FST
* without the Microsoft-specific trip point extension.
*
* Because of this, an initial notification needs to be triggered to
* start the cycle of trip points updates. This is achieved by setting
* the trip points sequencially to two separate ranges. As by the
* Microsoft specification the firmware should trigger a notification
* immediately if the fan speed is outside the trip point range. This
* _should_ result in at least one notification as both ranges do not
* overlap, meaning that the current fan speed needs to be outside at
* least one range.
*/
ret = acpi_fan_dsm_set_trip_points(dev, fan->fan_trip_granularity, 0);
if (ret < 0)
return ret;
return acpi_fan_dsm_set_trip_points(dev, fan->fan_trip_granularity * 3,
fan->fan_trip_granularity * 2);
}
static int acpi_fan_dsm_update_trips_points(struct device *dev, struct acpi_fan_fst *fst)
{
struct acpi_fan *fan = dev_get_drvdata(dev);
u64 upper, lower;
if (!fan->fan_trip_granularity)
return 0;
if (!acpi_fan_speed_valid(fst->speed))
return -EINVAL;
upper = roundup_u64(fst->speed + min_trip_distance, fan->fan_trip_granularity);
if (fst->speed <= min_trip_distance) {
lower = 0;
} else {
/*
* Valid fan speed values cannot be larger than 32 bit, so
* we can safely assume that no overflow will happen here.
*/
lower = rounddown((u32)fst->speed - min_trip_distance, fan->fan_trip_granularity);
}
return acpi_fan_dsm_set_trip_points(dev, upper, lower);
}
static void acpi_fan_notify_handler(acpi_handle handle, u32 event, void *context)
{
struct device *dev = context;
struct acpi_fan_fst fst;
int ret;
switch (event) {
case ACPI_FAN_NOTIFY_STATE_CHANGED:
/*
* The ACPI specification says that we must evaluate _FST when we
* receive an ACPI event indicating that the fan state has changed.
*/
ret = acpi_fan_get_fst(handle, &fst);
if (ret < 0) {
dev_err(dev, "Error retrieving current fan status: %d\n", ret);
} else {
ret = acpi_fan_dsm_update_trips_points(dev, &fst);
if (ret < 0)
dev_err(dev, "Failed to update trip points: %d\n", ret);
}
acpi_fan_notify_hwmon(dev);
acpi_bus_generate_netlink_event("fan", dev_name(dev), event, 0);
break;
default:
dev_dbg(dev, "Unsupported ACPI notification 0x%x\n", event);
break;
}
}
static void acpi_fan_notify_remove(void *data)
{
struct acpi_fan *fan = data;
acpi_remove_notify_handler(fan->handle, ACPI_DEVICE_NOTIFY, acpi_fan_notify_handler);
}
static int devm_acpi_fan_notify_init(struct device *dev)
{
struct acpi_fan *fan = dev_get_drvdata(dev);
acpi_status status;
status = acpi_install_notify_handler(fan->handle, ACPI_DEVICE_NOTIFY,
acpi_fan_notify_handler, dev);
if (ACPI_FAILURE(status))
return -EIO;
return devm_add_action_or_reset(dev, acpi_fan_notify_remove, fan);
}
static int acpi_fan_probe(struct platform_device *pdev)
{
int result = 0;
@ -347,10 +548,24 @@ static int acpi_fan_probe(struct platform_device *pdev)
}
if (fan->has_fst) {
result = acpi_fan_dsm_init(&pdev->dev);
if (result)
return result;
result = devm_acpi_fan_create_hwmon(&pdev->dev);
if (result)
return result;
result = devm_acpi_fan_notify_init(&pdev->dev);
if (result)
return result;
result = acpi_fan_dsm_start(&pdev->dev);
if (result) {
dev_err(&pdev->dev, "Failed to start Microsoft fan extensions\n");
return result;
}
result = acpi_fan_create_attributes(device);
if (result)
return result;
@ -436,8 +651,14 @@ static int acpi_fan_suspend(struct device *dev)
static int acpi_fan_resume(struct device *dev)
{
int result;
struct acpi_fan *fan = dev_get_drvdata(dev);
int result;
if (fan->has_fst) {
result = acpi_fan_dsm_start(dev);
if (result)
dev_err(dev, "Failed to start Microsoft fan extensions: %d\n", result);
}
if (fan->acpi4)
return 0;

View File

@ -15,10 +15,6 @@
#include "fan.h"
/* Returned when the ACPI fan does not support speed reporting */
#define FAN_SPEED_UNAVAILABLE U32_MAX
#define FAN_POWER_UNAVAILABLE U32_MAX
static struct acpi_fan_fps *acpi_fan_get_current_fps(struct acpi_fan *fan, u64 control)
{
unsigned int i;
@ -77,7 +73,7 @@ static umode_t acpi_fan_hwmon_is_visible(const void *drvdata, enum hwmon_sensor_
* when the associated attribute should not be created.
*/
for (i = 0; i < fan->fps_count; i++) {
if (fan->fps[i].power != FAN_POWER_UNAVAILABLE)
if (acpi_fan_power_valid(fan->fps[i].power))
return 0444;
}
@ -106,7 +102,7 @@ static int acpi_fan_hwmon_read(struct device *dev, enum hwmon_sensor_types type,
case hwmon_fan:
switch (attr) {
case hwmon_fan_input:
if (fst.speed == FAN_SPEED_UNAVAILABLE)
if (!acpi_fan_speed_valid(fst.speed))
return -ENODEV;
if (fst.speed > LONG_MAX)
@ -134,7 +130,7 @@ static int acpi_fan_hwmon_read(struct device *dev, enum hwmon_sensor_types type,
if (!fps)
return -EIO;
if (fps->power == FAN_POWER_UNAVAILABLE)
if (!acpi_fan_power_valid(fps->power))
return -ENODEV;
if (fps->power > LONG_MAX / MICROWATT_PER_MILLIWATT)
@ -166,12 +162,19 @@ static const struct hwmon_chip_info acpi_fan_hwmon_chip_info = {
.info = acpi_fan_hwmon_info,
};
void acpi_fan_notify_hwmon(struct device *dev)
{
struct acpi_fan *fan = dev_get_drvdata(dev);
hwmon_notify_event(fan->hdev, hwmon_fan, hwmon_fan_input, 0);
}
int devm_acpi_fan_create_hwmon(struct device *dev)
{
struct acpi_fan *fan = dev_get_drvdata(dev);
struct device *hdev;
hdev = devm_hwmon_device_register_with_info(dev, "acpi_fan", fan, &acpi_fan_hwmon_chip_info,
NULL);
return PTR_ERR_OR_ZERO(hdev);
fan->hdev = devm_hwmon_device_register_with_info(dev, "acpi_fan", fan,
&acpi_fan_hwmon_chip_info, NULL);
return PTR_ERR_OR_ZERO(fan->hdev);
}

View File

@ -222,6 +222,7 @@ int main(int argc, char *argv[])
fd_update_log = open("/dev/acpi_pfr_telemetry0", O_RDWR);
if (fd_update_log < 0) {
printf("PFRT device not supported - Quit...\n");
close(fd_update);
return 1;
}
@ -265,7 +266,8 @@ int main(int argc, char *argv[])
printf("chunk2_size:%d\n", data_info.chunk2_size);
printf("rollover_cnt:%d\n", data_info.rollover_cnt);
printf("reset_cnt:%d\n", data_info.reset_cnt);
close(fd_update);
close(fd_update_log);
return 0;
}
@ -358,6 +360,7 @@ int main(int argc, char *argv[])
if (ret == -1) {
perror("Failed to load capsule file");
munmap(addr_map_capsule, st.st_size);
close(fd_capsule);
close(fd_update);
close(fd_update_log);
@ -420,7 +423,7 @@ int main(int argc, char *argv[])
if (p_mmap == MAP_FAILED) {
perror("mmap error.");
close(fd_update_log);
free(log_buf);
return 1;
}