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// SPDX-License-Identifier: BSD-3-Clause-Clear
/*
* Copyright (c) 2020 The Linux Foundation. All rights reserved.
*/
#include <linux/device.h>
#include <linux/sysfs.h>
#include <linux/thermal.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include "core.h"
#include "debug.h"
static int
ath11k_thermal_get_max_throttle_state(struct thermal_cooling_device *cdev,
unsigned long *state)
{
*state = ATH11K_THERMAL_THROTTLE_MAX;
return 0;
}
static int
ath11k_thermal_get_cur_throttle_state(struct thermal_cooling_device *cdev,
unsigned long *state)
{
struct ath11k *ar = cdev->devdata;
mutex_lock(&ar->conf_mutex);
*state = ar->thermal.throttle_state;
mutex_unlock(&ar->conf_mutex);
return 0;
}
static int
ath11k_thermal_set_cur_throttle_state(struct thermal_cooling_device *cdev,
unsigned long throttle_state)
{
struct ath11k *ar = cdev->devdata;
int ret;
if (throttle_state > ATH11K_THERMAL_THROTTLE_MAX) {
ath11k_warn(ar->ab, "throttle state %ld is exceeding the limit %d\n",
throttle_state, ATH11K_THERMAL_THROTTLE_MAX);
return -EINVAL;
}
mutex_lock(&ar->conf_mutex);
ret = ath11k_thermal_set_throttling(ar, throttle_state);
if (ret == 0)
ar->thermal.throttle_state = throttle_state;
mutex_unlock(&ar->conf_mutex);
return ret;
}
static struct thermal_cooling_device_ops ath11k_thermal_ops = {
.get_max_state = ath11k_thermal_get_max_throttle_state,
.get_cur_state = ath11k_thermal_get_cur_throttle_state,
.set_cur_state = ath11k_thermal_set_cur_throttle_state,
};
static ssize_t ath11k_thermal_show_temp(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct ath11k *ar = dev_get_drvdata(dev);
int ret, temperature;
unsigned long time_left;
mutex_lock(&ar->conf_mutex);
/* Can't get temperature when the card is off */
if (ar->state != ATH11K_STATE_ON) {
ret = -ENETDOWN;
goto out;
}
reinit_completion(&ar->thermal.wmi_sync);
ret = ath11k_wmi_send_pdev_temperature_cmd(ar);
if (ret) {
ath11k_warn(ar->ab, "failed to read temperature %d\n", ret);
goto out;
}
if (test_bit(ATH11K_FLAG_CRASH_FLUSH, &ar->ab->dev_flags)) {
ret = -ESHUTDOWN;
goto out;
}
time_left = wait_for_completion_timeout(&ar->thermal.wmi_sync,
ATH11K_THERMAL_SYNC_TIMEOUT_HZ);
if (!time_left) {
ath11k_warn(ar->ab, "failed to synchronize thermal read\n");
ret = -ETIMEDOUT;
goto out;
}
spin_lock_bh(&ar->data_lock);
temperature = ar->thermal.temperature;
spin_unlock_bh(&ar->data_lock);
/* display in millidegree celcius */
ret = snprintf(buf, PAGE_SIZE, "%d\n", temperature * 1000);
out:
mutex_unlock(&ar->conf_mutex);
return ret;
}
void ath11k_thermal_event_temperature(struct ath11k *ar, int temperature)
{
spin_lock_bh(&ar->data_lock);
ar->thermal.temperature = temperature;
spin_unlock_bh(&ar->data_lock);
complete(&ar->thermal.wmi_sync);
}
static SENSOR_DEVICE_ATTR(temp1_input, 0444, ath11k_thermal_show_temp,
NULL, 0);
static struct attribute *ath11k_hwmon_attrs[] = {
&sensor_dev_attr_temp1_input.dev_attr.attr,
NULL,
};
ATTRIBUTE_GROUPS(ath11k_hwmon);
int ath11k_thermal_set_throttling(struct ath11k *ar, u32 throttle_state)
{
struct ath11k_base *sc = ar->ab;
struct thermal_mitigation_params param;
int ret = 0;
lockdep_assert_held(&ar->conf_mutex);
if (ar->state != ATH11K_STATE_ON)
return 0;
memset(¶m, 0, sizeof(param));
param.pdev_id = ar->pdev->pdev_id;
param.enable = throttle_state ? 1 : 0;
param.dc = ATH11K_THERMAL_DEFAULT_DUTY_CYCLE;
param.dc_per_event = 0xFFFFFFFF;
param.levelconf[0].tmplwm = ATH11K_THERMAL_TEMP_LOW_MARK;
param.levelconf[0].tmphwm = ATH11K_THERMAL_TEMP_HIGH_MARK;
param.levelconf[0].dcoffpercent = throttle_state;
param.levelconf[0].priority = 0; /* disable all data tx queues */
ret = ath11k_wmi_send_thermal_mitigation_param_cmd(ar, ¶m);
if (ret) {
ath11k_warn(sc, "failed to send thermal mitigation duty cycle %u ret %d\n",
throttle_state, ret);
}
return ret;
}
int ath11k_thermal_register(struct ath11k_base *sc)
{
struct thermal_cooling_device *cdev;
struct device *hwmon_dev;
struct ath11k *ar;
struct ath11k_pdev *pdev;
int i, ret;
for (i = 0; i < sc->num_radios; i++) {
pdev = &sc->pdevs[i];
ar = pdev->ar;
if (!ar)
continue;
cdev = thermal_cooling_device_register("ath11k_thermal", ar,
&ath11k_thermal_ops);
if (IS_ERR(cdev)) {
ath11k_err(sc, "failed to setup thermal device result: %ld\n",
PTR_ERR(cdev));
ret = -EINVAL;
goto err_thermal_destroy;
}
ar->thermal.cdev = cdev;
ret = sysfs_create_link(&ar->hw->wiphy->dev.kobj, &cdev->device.kobj,
"cooling_device");
if (ret) {
ath11k_err(sc, "failed to create cooling device symlink\n");
goto err_thermal_destroy;
}
if (!IS_REACHABLE(CONFIG_HWMON))
return 0;
hwmon_dev = devm_hwmon_device_register_with_groups(&ar->hw->wiphy->dev,
"ath11k_hwmon", ar,
ath11k_hwmon_groups);
if (IS_ERR(hwmon_dev)) {
ath11k_err(ar->ab, "failed to register hwmon device: %ld\n",
PTR_ERR(hwmon_dev));
ret = -EINVAL;
goto err_thermal_destroy;
}
}
return 0;
err_thermal_destroy:
ath11k_thermal_unregister(sc);
return ret;
}
void ath11k_thermal_unregister(struct ath11k_base *sc)
{
struct ath11k *ar;
struct ath11k_pdev *pdev;
int i;
for (i = 0; i < sc->num_radios; i++) {
pdev = &sc->pdevs[i];
ar = pdev->ar;
if (!ar)
continue;
sysfs_remove_link(&ar->hw->wiphy->dev.kobj, "cooling_device");
thermal_cooling_device_unregister(ar->thermal.cdev);
}
}
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