summaryrefslogtreecommitdiffstats
path: root/drivers/net/wireless/ath/ath11k/thermal.c
blob: c29b11ab5bfa45bd688f9efb453ef5da617d7042 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
// SPDX-License-Identifier: BSD-3-Clause-Clear
/*
 * Copyright (c) 2020 The Linux Foundation. All rights reserved.
 * Copyright (c) 2022-2023 Qualcomm Innovation Center, Inc. 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 const 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 Celsius */
	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 *ab = 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(&param, 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, &param);
	if (ret) {
		ath11k_warn(ab, "failed to send thermal mitigation duty cycle %u ret %d\n",
			    throttle_state, ret);
	}

	return ret;
}

int ath11k_thermal_register(struct ath11k_base *ab)
{
	struct thermal_cooling_device *cdev;
	struct device *hwmon_dev;
	struct ath11k *ar;
	struct ath11k_pdev *pdev;
	int i, ret;

	for (i = 0; i < ab->num_radios; i++) {
		pdev = &ab->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(ab, "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(ab, "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(ab);
	return ret;
}

void ath11k_thermal_unregister(struct ath11k_base *ab)
{
	struct ath11k *ar;
	struct ath11k_pdev *pdev;
	int i;

	for (i = 0; i < ab->num_radios; i++) {
		pdev = &ab->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);
	}
}