1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2 /*
3 * Copyright (C) 2024-2026 Intel Corporation
4 */
5 #ifdef CONFIG_THERMAL
6 #include <linux/sort.h>
7 #include <linux/thermal.h>
8 #endif
9
10 #include "fw/api/phy.h"
11
12 #include "thermal.h"
13 #include "mld.h"
14 #include "hcmd.h"
15
16 #define IWL_MLD_NUM_CTDP_STEPS 20
17 #define IWL_MLD_MIN_CTDP_BUDGET_MW 150
18
19 #define IWL_MLD_CT_KILL_DURATION (5 * HZ)
20
iwl_mld_handle_ct_kill_notif(struct iwl_mld * mld,struct iwl_rx_packet * pkt)21 void iwl_mld_handle_ct_kill_notif(struct iwl_mld *mld,
22 struct iwl_rx_packet *pkt)
23 {
24 const struct ct_kill_notif *notif = (const void *)pkt->data;
25
26 IWL_ERR(mld,
27 "CT Kill notification: temp = %d, DTS = 0x%x, Scheme 0x%x - Enter CT Kill\n",
28 le16_to_cpu(notif->temperature), notif->dts,
29 notif->scheme);
30
31 iwl_mld_set_ctkill(mld, true);
32
33 wiphy_delayed_work_queue(mld->wiphy, &mld->ct_kill_exit_wk,
34 round_jiffies_relative(IWL_MLD_CT_KILL_DURATION));
35 }
36
iwl_mld_exit_ctkill(struct wiphy * wiphy,struct wiphy_work * wk)37 static void iwl_mld_exit_ctkill(struct wiphy *wiphy, struct wiphy_work *wk)
38 {
39 struct iwl_mld *mld;
40
41 mld = container_of(wk, struct iwl_mld, ct_kill_exit_wk.work);
42
43 IWL_ERR(mld, "Exit CT Kill\n");
44 iwl_mld_set_ctkill(mld, false);
45 }
46
iwl_mld_handle_temp_notif(struct iwl_mld * mld,struct iwl_rx_packet * pkt)47 void iwl_mld_handle_temp_notif(struct iwl_mld *mld, struct iwl_rx_packet *pkt)
48 {
49 const struct iwl_dts_measurement_notif *notif =
50 (const void *)pkt->data;
51 int temp;
52 u32 ths_crossed;
53
54 temp = le32_to_cpu(notif->temp);
55
56 /* shouldn't be negative, but since it's s32, make sure it isn't */
57 if (IWL_FW_CHECK(mld, temp < 0, "negative temperature %d\n", temp))
58 return;
59
60 ths_crossed = le32_to_cpu(notif->threshold_idx);
61
62 /* 0xFF in ths_crossed means the notification is not related
63 * to a trip, so we can ignore it here.
64 */
65 if (ths_crossed == 0xFF)
66 return;
67
68 IWL_DEBUG_TEMP(mld, "Temp = %d Threshold crossed = %d\n",
69 temp, ths_crossed);
70
71 if (IWL_FW_CHECK(mld, ths_crossed >= IWL_MAX_DTS_TRIPS,
72 "bad threshold: %d\n", ths_crossed))
73 return;
74
75 #ifdef CONFIG_THERMAL
76 if (mld->tzone)
77 thermal_zone_device_update(mld->tzone, THERMAL_TRIP_VIOLATED);
78 #endif /* CONFIG_THERMAL */
79 }
80
81 #ifdef CONFIG_THERMAL
iwl_mld_get_temp(struct iwl_mld * mld,s32 * temp)82 static int iwl_mld_get_temp(struct iwl_mld *mld, s32 *temp)
83 {
84 struct iwl_host_cmd cmd = {
85 .id = WIDE_ID(PHY_OPS_GROUP, CMD_DTS_MEASUREMENT_TRIGGER_WIDE),
86 .flags = CMD_WANT_SKB,
87 };
88 const struct iwl_dts_measurement_resp *resp;
89 int ret;
90
91 lockdep_assert_wiphy(mld->wiphy);
92
93 ret = iwl_mld_send_cmd(mld, &cmd);
94 if (ret) {
95 IWL_ERR(mld,
96 "Failed to send the temperature measurement command (err=%d)\n",
97 ret);
98 return ret;
99 }
100
101 if (iwl_rx_packet_payload_len(cmd.resp_pkt) < sizeof(*resp)) {
102 IWL_ERR(mld,
103 "Failed to get a valid response to DTS measurement\n");
104 ret = -EIO;
105 goto free_resp;
106 }
107
108 resp = (const void *)cmd.resp_pkt->data;
109 *temp = le32_to_cpu(resp->temp);
110
111 IWL_DEBUG_TEMP(mld,
112 "Got temperature measurement response: temp=%d\n",
113 *temp);
114
115 free_resp:
116 iwl_free_resp(&cmd);
117 return ret;
118 }
119
compare_temps(const void * a,const void * b)120 static int compare_temps(const void *a, const void *b)
121 {
122 return ((s16)le16_to_cpu(*(const __le16 *)a) -
123 (s16)le16_to_cpu(*(const __le16 *)b));
124 }
125
126 struct iwl_trip_walk_data {
127 __le16 *thresholds;
128 int count;
129 };
130
iwl_trip_temp_iter(struct thermal_trip * trip,void * arg)131 static int iwl_trip_temp_iter(struct thermal_trip *trip, void *arg)
132 {
133 struct iwl_trip_walk_data *twd = arg;
134
135 if (trip->temperature == THERMAL_TEMP_INVALID)
136 return 0;
137
138 twd->thresholds[twd->count++] =
139 cpu_to_le16((s16)(trip->temperature / 1000));
140 return 0;
141 }
142 #endif
143
iwl_mld_config_temp_report_ths(struct iwl_mld * mld)144 int iwl_mld_config_temp_report_ths(struct iwl_mld *mld)
145 {
146 struct temp_report_ths_cmd cmd = {0};
147 int ret;
148 #ifdef CONFIG_THERMAL
149 struct iwl_trip_walk_data twd = {
150 .thresholds = cmd.thresholds,
151 .count = 0
152 };
153
154 if (!mld->tzone)
155 goto send;
156
157 /* The thermal core holds an array of temperature trips that are
158 * unsorted and uncompressed, the FW should get it compressed and
159 * sorted.
160 */
161
162 /* compress trips to cmd array, remove uninitialized values*/
163 for_each_thermal_trip(mld->tzone, iwl_trip_temp_iter, &twd);
164
165 cmd.num_temps = cpu_to_le32(twd.count);
166 if (twd.count)
167 sort(cmd.thresholds, twd.count, sizeof(s16),
168 compare_temps, NULL);
169
170 send:
171 #endif
172 lockdep_assert_wiphy(mld->wiphy);
173
174 ret = iwl_mld_send_cmd_pdu(mld, WIDE_ID(PHY_OPS_GROUP,
175 TEMP_REPORTING_THRESHOLDS_CMD),
176 &cmd);
177 if (ret)
178 IWL_ERR(mld, "TEMP_REPORT_THS_CMD command failed (err=%d)\n",
179 ret);
180
181 return ret;
182 }
183
184 #ifdef CONFIG_THERMAL
iwl_mld_tzone_get_temp(struct thermal_zone_device * device,int * temperature)185 static int iwl_mld_tzone_get_temp(struct thermal_zone_device *device,
186 int *temperature)
187 {
188 struct iwl_mld *mld = thermal_zone_device_priv(device);
189 int temp;
190 int ret = 0;
191
192 wiphy_lock(mld->wiphy);
193
194 if (!mld->fw_status.running) {
195 /* Tell the core that there is no valid temperature value to
196 * return, but it need not worry about this.
197 */
198 *temperature = THERMAL_TEMP_INVALID;
199 goto unlock;
200 }
201
202 ret = iwl_mld_get_temp(mld, &temp);
203 if (ret)
204 goto unlock;
205
206 *temperature = temp * 1000;
207 unlock:
208 wiphy_unlock(mld->wiphy);
209 return ret;
210 }
211
iwl_mld_tzone_set_trip_temp(struct thermal_zone_device * device,const struct thermal_trip * trip,int temp)212 static int iwl_mld_tzone_set_trip_temp(struct thermal_zone_device *device,
213 const struct thermal_trip *trip,
214 int temp)
215 {
216 struct iwl_mld *mld = thermal_zone_device_priv(device);
217 int ret;
218
219 wiphy_lock(mld->wiphy);
220
221 if (!mld->fw_status.running) {
222 ret = -EIO;
223 goto unlock;
224 }
225
226 if ((temp / 1000) > S16_MAX) {
227 ret = -EINVAL;
228 goto unlock;
229 }
230
231 ret = iwl_mld_config_temp_report_ths(mld);
232 unlock:
233 wiphy_unlock(mld->wiphy);
234 return ret;
235 }
236
237 static struct thermal_zone_device_ops tzone_ops = {
238 .get_temp = iwl_mld_tzone_get_temp,
239 .set_trip_temp = iwl_mld_tzone_set_trip_temp,
240 };
241
iwl_mld_thermal_zone_register(struct iwl_mld * mld)242 static void iwl_mld_thermal_zone_register(struct iwl_mld *mld)
243 {
244 int ret;
245 char name[16];
246 static atomic_t counter = ATOMIC_INIT(0);
247 struct thermal_trip trips[IWL_MAX_DTS_TRIPS] = {
248 [0 ... IWL_MAX_DTS_TRIPS - 1] = {
249 .temperature = THERMAL_TEMP_INVALID,
250 .type = THERMAL_TRIP_PASSIVE,
251 .flags = THERMAL_TRIP_FLAG_RW_TEMP,
252 },
253 };
254
255 BUILD_BUG_ON(ARRAY_SIZE(name) >= THERMAL_NAME_LENGTH);
256
257 sprintf(name, "iwlwifi_%u", atomic_inc_return(&counter) & 0xFF);
258 mld->tzone =
259 thermal_zone_device_register_with_trips(name, trips,
260 IWL_MAX_DTS_TRIPS,
261 mld, &tzone_ops,
262 NULL, 0, 0);
263 if (IS_ERR(mld->tzone)) {
264 IWL_DEBUG_TEMP(mld,
265 "Failed to register to thermal zone (err = %ld)\n",
266 PTR_ERR(mld->tzone));
267 mld->tzone = NULL;
268 return;
269 }
270
271 ret = thermal_zone_device_enable(mld->tzone);
272 if (ret) {
273 IWL_DEBUG_TEMP(mld, "Failed to enable thermal zone\n");
274 thermal_zone_device_unregister(mld->tzone);
275 mld->tzone = NULL;
276 }
277 }
278
iwl_mld_config_ctdp(struct iwl_mld * mld,u32 state,enum iwl_ctdp_cmd_operation op)279 int iwl_mld_config_ctdp(struct iwl_mld *mld, u32 state,
280 enum iwl_ctdp_cmd_operation op)
281 {
282 struct iwl_ctdp_cmd cmd = {
283 .operation = cpu_to_le32(op),
284 .window_size = 0,
285 };
286 u32 budget;
287 int ret;
288
289 lockdep_assert_wiphy(mld->wiphy);
290
291 /* Do a linear scale from IWL_MLD_MIN_CTDP_BUDGET_MW to the configured
292 * maximum in the predefined number of steps.
293 */
294 budget = ((mld->power_budget_mw - IWL_MLD_MIN_CTDP_BUDGET_MW) *
295 (IWL_MLD_NUM_CTDP_STEPS - 1 - state)) /
296 (IWL_MLD_NUM_CTDP_STEPS - 1) +
297 IWL_MLD_MIN_CTDP_BUDGET_MW;
298 cmd.budget = cpu_to_le32(budget);
299
300 ret = iwl_mld_send_cmd_pdu(mld, WIDE_ID(PHY_OPS_GROUP, CTDP_CONFIG_CMD),
301 &cmd);
302
303 if (ret) {
304 IWL_ERR(mld, "cTDP command failed (err=%d)\n", ret);
305 return ret;
306 }
307
308 if (op == CTDP_CMD_OPERATION_START)
309 mld->cooling_dev.cur_state = state;
310
311 return 0;
312 }
313
iwl_mld_tcool_get_max_state(struct thermal_cooling_device * cdev,unsigned long * state)314 static int iwl_mld_tcool_get_max_state(struct thermal_cooling_device *cdev,
315 unsigned long *state)
316 {
317 *state = IWL_MLD_NUM_CTDP_STEPS - 1;
318
319 return 0;
320 }
321
iwl_mld_tcool_get_cur_state(struct thermal_cooling_device * cdev,unsigned long * state)322 static int iwl_mld_tcool_get_cur_state(struct thermal_cooling_device *cdev,
323 unsigned long *state)
324 {
325 struct iwl_mld *mld = (struct iwl_mld *)(cdev->devdata);
326
327 *state = mld->cooling_dev.cur_state;
328
329 return 0;
330 }
331
iwl_mld_tcool_set_cur_state(struct thermal_cooling_device * cdev,unsigned long new_state)332 static int iwl_mld_tcool_set_cur_state(struct thermal_cooling_device *cdev,
333 unsigned long new_state)
334 {
335 struct iwl_mld *mld = (struct iwl_mld *)(cdev->devdata);
336 int ret;
337
338 wiphy_lock(mld->wiphy);
339
340 if (!mld->fw_status.running) {
341 ret = -EIO;
342 goto unlock;
343 }
344
345 if (new_state >= IWL_MLD_NUM_CTDP_STEPS) {
346 ret = -EINVAL;
347 goto unlock;
348 }
349
350 ret = iwl_mld_config_ctdp(mld, new_state, CTDP_CMD_OPERATION_START);
351
352 unlock:
353 wiphy_unlock(mld->wiphy);
354 return ret;
355 }
356
357 static const struct thermal_cooling_device_ops tcooling_ops = {
358 .get_max_state = iwl_mld_tcool_get_max_state,
359 .get_cur_state = iwl_mld_tcool_get_cur_state,
360 .set_cur_state = iwl_mld_tcool_set_cur_state,
361 };
362
iwl_mld_cooling_device_register(struct iwl_mld * mld)363 static void iwl_mld_cooling_device_register(struct iwl_mld *mld)
364 {
365 char name[] = "iwlwifi";
366
367 BUILD_BUG_ON(ARRAY_SIZE(name) >= THERMAL_NAME_LENGTH);
368
369 mld->cooling_dev.cdev =
370 thermal_cooling_device_register(name,
371 mld,
372 &tcooling_ops);
373
374 if (IS_ERR(mld->cooling_dev.cdev)) {
375 IWL_DEBUG_TEMP(mld,
376 "Failed to register to cooling device (err = %ld)\n",
377 PTR_ERR(mld->cooling_dev.cdev));
378 mld->cooling_dev.cdev = NULL;
379 return;
380 }
381 }
382
iwl_mld_thermal_zone_unregister(struct iwl_mld * mld)383 static void iwl_mld_thermal_zone_unregister(struct iwl_mld *mld)
384 {
385 if (!mld->tzone)
386 return;
387
388 IWL_DEBUG_TEMP(mld, "Thermal zone device unregister\n");
389 thermal_zone_device_unregister(mld->tzone);
390 mld->tzone = NULL;
391 }
392
iwl_mld_cooling_device_unregister(struct iwl_mld * mld)393 static void iwl_mld_cooling_device_unregister(struct iwl_mld *mld)
394 {
395 if (!mld->cooling_dev.cdev)
396 return;
397
398 IWL_DEBUG_TEMP(mld, "Cooling device unregister\n");
399 if (mld->cooling_dev.cdev) {
400 thermal_cooling_device_unregister(mld->cooling_dev.cdev);
401 mld->cooling_dev.cdev = NULL;
402 }
403 }
404 #endif /* CONFIG_THERMAL */
405
iwl_mld_ctdp_get_max_budget(struct iwl_mld * mld)406 static u32 iwl_mld_ctdp_get_max_budget(struct iwl_mld *mld)
407 {
408 u64 bios_power_budget = 0;
409 u32 default_power_budget;
410
411 switch (CSR_HW_RFID_TYPE(mld->trans->info.hw_rf_id)) {
412 case IWL_CFG_RF_TYPE_GF:
413 /* dual-radio devices have a higher budget */
414 if (CSR_HW_RFID_IS_CDB(mld->trans->info.hw_rf_id))
415 default_power_budget = 5200;
416 else
417 default_power_budget = 2880;
418 break;
419 case IWL_CFG_RF_TYPE_FM:
420 default_power_budget = 3450;
421 break;
422 case IWL_CFG_RF_TYPE_WH:
423 case IWL_CFG_RF_TYPE_PE:
424 default:
425 default_power_budget = 5550;
426 break;
427 }
428
429 iwl_bios_get_pwr_limit(&mld->fwrt, &bios_power_budget);
430
431 /* 32bit in UEFI, 16bit in ACPI; use BIOS value if it is in range */
432 if (bios_power_budget &&
433 bios_power_budget != 0xffff && bios_power_budget != 0xffffffff &&
434 bios_power_budget >= IWL_MLD_MIN_CTDP_BUDGET_MW &&
435 bios_power_budget <= default_power_budget)
436 return (u32)bios_power_budget;
437
438 return default_power_budget;
439 }
440
iwl_mld_thermal_initialize(struct iwl_mld * mld)441 void iwl_mld_thermal_initialize(struct iwl_mld *mld)
442 {
443 lockdep_assert_not_held(&mld->wiphy->mtx);
444
445 wiphy_delayed_work_init(&mld->ct_kill_exit_wk, iwl_mld_exit_ctkill);
446
447 mld->power_budget_mw = iwl_mld_ctdp_get_max_budget(mld);
448 IWL_DEBUG_TEMP(mld, "cTDP power budget: %d mW\n", mld->power_budget_mw);
449
450 #ifdef CONFIG_THERMAL
451 iwl_mld_cooling_device_register(mld);
452 iwl_mld_thermal_zone_register(mld);
453 #endif
454 }
455
iwl_mld_thermal_exit(struct iwl_mld * mld)456 void iwl_mld_thermal_exit(struct iwl_mld *mld)
457 {
458 wiphy_lock(mld->wiphy);
459 wiphy_delayed_work_cancel(mld->wiphy, &mld->ct_kill_exit_wk);
460 wiphy_unlock(mld->wiphy);
461
462 #ifdef CONFIG_THERMAL
463 iwl_mld_cooling_device_unregister(mld);
464 iwl_mld_thermal_zone_unregister(mld);
465 #endif
466 }
467