1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2 /*
3 * Copyright (C) 2012-2014, 2019-2022, 2024-2025 Intel Corporation
4 * Copyright (C) 2013-2014 Intel Mobile Communications GmbH
5 * Copyright (C) 2015-2016 Intel Deutschland GmbH
6 */
7 #include <linux/sort.h>
8
9 #include "mvm.h"
10
11 #define IWL_MVM_NUM_CTDP_STEPS 20
12 #define IWL_MVM_MIN_CTDP_BUDGET_MW 150
13
14 #define IWL_MVM_TEMP_NOTIF_WAIT_TIMEOUT HZ
15
iwl_mvm_enter_ctkill(struct iwl_mvm * mvm)16 void iwl_mvm_enter_ctkill(struct iwl_mvm *mvm)
17 {
18 struct iwl_mvm_tt_mgmt *tt = &mvm->thermal_throttle;
19 u32 duration = tt->params.ct_kill_duration;
20
21 if (test_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status))
22 return;
23
24 IWL_ERR(mvm, "Enter CT Kill\n");
25 iwl_mvm_set_hw_ctkill_state(mvm, true);
26
27 if (!iwl_mvm_is_tt_in_fw(mvm)) {
28 tt->throttle = false;
29 tt->dynamic_smps = false;
30 }
31
32 /* Don't schedule an exit work if we're in test mode, since
33 * the temperature will not change unless we manually set it
34 * again (or disable testing).
35 */
36 if (!mvm->temperature_test)
37 schedule_delayed_work(&tt->ct_kill_exit,
38 round_jiffies_relative(duration * HZ));
39 }
40
iwl_mvm_exit_ctkill(struct iwl_mvm * mvm)41 static void iwl_mvm_exit_ctkill(struct iwl_mvm *mvm)
42 {
43 if (!test_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status))
44 return;
45
46 IWL_ERR(mvm, "Exit CT Kill\n");
47 iwl_mvm_set_hw_ctkill_state(mvm, false);
48 }
49
iwl_mvm_tt_temp_changed(struct iwl_mvm * mvm,u32 temp)50 static void iwl_mvm_tt_temp_changed(struct iwl_mvm *mvm, u32 temp)
51 {
52 /* ignore the notification if we are in test mode */
53 if (mvm->temperature_test)
54 return;
55
56 if (mvm->temperature == temp)
57 return;
58
59 mvm->temperature = temp;
60 iwl_mvm_tt_handler(mvm);
61 }
62
iwl_mvm_temp_notif_parse(struct iwl_mvm * mvm,struct iwl_rx_packet * pkt)63 static int iwl_mvm_temp_notif_parse(struct iwl_mvm *mvm,
64 struct iwl_rx_packet *pkt)
65 {
66 struct iwl_dts_measurement_notif_v1 *notif_v1;
67 int len = iwl_rx_packet_payload_len(pkt);
68 int temp;
69
70 /* we can use notif_v1 only, because v2 only adds an additional
71 * parameter, which is not used in this function.
72 */
73 if (WARN_ON_ONCE(len < sizeof(*notif_v1))) {
74 IWL_ERR(mvm, "Invalid DTS_MEASUREMENT_NOTIFICATION\n");
75 return -EINVAL;
76 }
77
78 notif_v1 = (void *)pkt->data;
79
80 temp = le32_to_cpu(notif_v1->temp);
81
82 /* shouldn't be negative, but since it's s32, make sure it isn't */
83 if (WARN_ON_ONCE(temp < 0))
84 temp = 0;
85
86 IWL_DEBUG_TEMP(mvm, "DTS_MEASUREMENT_NOTIFICATION - %d\n", temp);
87
88 return temp;
89 }
90
iwl_mvm_temp_notif_wait(struct iwl_notif_wait_data * notif_wait,struct iwl_rx_packet * pkt,void * data)91 static bool iwl_mvm_temp_notif_wait(struct iwl_notif_wait_data *notif_wait,
92 struct iwl_rx_packet *pkt, void *data)
93 {
94 struct iwl_mvm *mvm =
95 container_of(notif_wait, struct iwl_mvm, notif_wait);
96 int *temp = data;
97 int ret;
98
99 ret = iwl_mvm_temp_notif_parse(mvm, pkt);
100 if (ret < 0)
101 return true;
102
103 *temp = ret;
104
105 return true;
106 }
107
iwl_mvm_temp_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)108 void iwl_mvm_temp_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
109 {
110 struct iwl_rx_packet *pkt = rxb_addr(rxb);
111 struct iwl_dts_measurement_notif *notif_v2;
112 int len = iwl_rx_packet_payload_len(pkt);
113 int temp;
114 u32 ths_crossed;
115
116 /* the notification is handled synchronously in ctkill, so skip here */
117 if (test_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status))
118 return;
119
120 temp = iwl_mvm_temp_notif_parse(mvm, pkt);
121
122 if (!iwl_mvm_is_tt_in_fw(mvm)) {
123 if (temp >= 0)
124 iwl_mvm_tt_temp_changed(mvm, temp);
125 return;
126 }
127
128 if (WARN_ON_ONCE(len < sizeof(*notif_v2))) {
129 IWL_ERR(mvm, "Invalid DTS_MEASUREMENT_NOTIFICATION\n");
130 return;
131 }
132
133 notif_v2 = (void *)pkt->data;
134 ths_crossed = le32_to_cpu(notif_v2->threshold_idx);
135
136 /* 0xFF in ths_crossed means the notification is not related
137 * to a trip, so we can ignore it here.
138 */
139 if (ths_crossed == 0xFF)
140 return;
141
142 IWL_DEBUG_TEMP(mvm, "Temp = %d Threshold crossed = %d\n",
143 temp, ths_crossed);
144
145 #ifdef CONFIG_THERMAL
146 if (WARN_ON(ths_crossed >= IWL_MAX_DTS_TRIPS))
147 return;
148
149 if (mvm->tz_device.tzone) {
150 struct iwl_mvm_thermal_device *tz_dev = &mvm->tz_device;
151
152 thermal_zone_device_update(tz_dev->tzone,
153 THERMAL_TRIP_VIOLATED);
154 }
155 #endif /* CONFIG_THERMAL */
156 }
157
iwl_mvm_ct_kill_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)158 void iwl_mvm_ct_kill_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
159 {
160 struct iwl_rx_packet *pkt = rxb_addr(rxb);
161 struct ct_kill_notif *notif;
162
163 notif = (struct ct_kill_notif *)pkt->data;
164 IWL_DEBUG_TEMP(mvm, "CT Kill notification temperature = %d\n",
165 notif->temperature);
166 if (iwl_fw_lookup_notif_ver(mvm->fw, PHY_OPS_GROUP,
167 CT_KILL_NOTIFICATION, 0) > 1)
168 IWL_DEBUG_TEMP(mvm,
169 "CT kill notification DTS bitmap = 0x%x, Scheme = %d\n",
170 notif->dts, notif->scheme);
171
172 iwl_mvm_enter_ctkill(mvm);
173 }
174
175 /*
176 * send the DTS_MEASUREMENT_TRIGGER command with or without waiting for a
177 * response. If we get a response then the measurement is stored in 'temp'
178 */
iwl_mvm_send_temp_cmd(struct iwl_mvm * mvm,bool response,s32 * temp)179 static int iwl_mvm_send_temp_cmd(struct iwl_mvm *mvm, bool response, s32 *temp)
180 {
181 struct iwl_host_cmd cmd = {};
182 struct iwl_dts_measurement_cmd dts_cmd = {
183 .flags = cpu_to_le32(DTS_TRIGGER_CMD_FLAGS_TEMP),
184 };
185 struct iwl_ext_dts_measurement_cmd ext_cmd = {
186 .control_mode = cpu_to_le32(DTS_DIRECT_WITHOUT_MEASURE),
187 };
188 struct iwl_dts_measurement_resp *resp;
189 void *cmd_ptr;
190 int ret;
191 u32 cmd_flags = 0;
192 u16 len;
193
194 /* Check which command format is used (regular/extended) */
195 if (fw_has_capa(&mvm->fw->ucode_capa,
196 IWL_UCODE_TLV_CAPA_EXTENDED_DTS_MEASURE)) {
197 len = sizeof(ext_cmd);
198 cmd_ptr = &ext_cmd;
199 } else {
200 len = sizeof(dts_cmd);
201 cmd_ptr = &dts_cmd;
202 }
203 /* The command version where we get a response is zero length */
204 if (response) {
205 cmd_flags = CMD_WANT_SKB;
206 len = 0;
207 }
208
209 cmd.id = WIDE_ID(PHY_OPS_GROUP, CMD_DTS_MEASUREMENT_TRIGGER_WIDE);
210 cmd.len[0] = len;
211 cmd.flags = cmd_flags;
212 cmd.data[0] = cmd_ptr;
213
214 IWL_DEBUG_TEMP(mvm,
215 "Sending temperature measurement command - %s response\n",
216 response ? "with" : "without");
217 ret = iwl_mvm_send_cmd(mvm, &cmd);
218
219 if (ret) {
220 IWL_ERR(mvm,
221 "Failed to send the temperature measurement command (err=%d)\n",
222 ret);
223 return ret;
224 }
225
226 if (response) {
227 resp = (void *)cmd.resp_pkt->data;
228 *temp = le32_to_cpu(resp->temp);
229 IWL_DEBUG_TEMP(mvm,
230 "Got temperature measurement response: temp=%d\n",
231 *temp);
232 iwl_free_resp(&cmd);
233 }
234
235 return ret;
236 }
237
iwl_mvm_get_temp(struct iwl_mvm * mvm,s32 * temp)238 int iwl_mvm_get_temp(struct iwl_mvm *mvm, s32 *temp)
239 {
240 struct iwl_notification_wait wait_temp_notif;
241 static u16 temp_notif[] = { WIDE_ID(PHY_OPS_GROUP,
242 DTS_MEASUREMENT_NOTIF_WIDE) };
243 int ret;
244 u8 cmd_ver;
245
246 /*
247 * If command version is 1 we send the command and immediately get
248 * a response. For older versions we send the command and wait for a
249 * notification (no command TLV for previous versions).
250 */
251 cmd_ver = iwl_fw_lookup_cmd_ver(mvm->fw,
252 WIDE_ID(PHY_OPS_GROUP, CMD_DTS_MEASUREMENT_TRIGGER_WIDE),
253 IWL_FW_CMD_VER_UNKNOWN);
254 if (cmd_ver == 1)
255 return iwl_mvm_send_temp_cmd(mvm, true, temp);
256
257 lockdep_assert_held(&mvm->mutex);
258
259 iwl_init_notification_wait(&mvm->notif_wait, &wait_temp_notif,
260 temp_notif, ARRAY_SIZE(temp_notif),
261 iwl_mvm_temp_notif_wait, temp);
262
263 ret = iwl_mvm_send_temp_cmd(mvm, false, temp);
264 if (ret) {
265 iwl_remove_notification(&mvm->notif_wait, &wait_temp_notif);
266 return ret;
267 }
268
269 ret = iwl_wait_notification(&mvm->notif_wait, &wait_temp_notif,
270 IWL_MVM_TEMP_NOTIF_WAIT_TIMEOUT);
271 if (ret)
272 IWL_WARN(mvm, "Getting the temperature timed out\n");
273
274 return ret;
275 }
276
check_exit_ctkill(struct work_struct * work)277 static void check_exit_ctkill(struct work_struct *work)
278 {
279 struct iwl_mvm_tt_mgmt *tt;
280 struct iwl_mvm *mvm;
281 u32 duration;
282 s32 temp;
283 int ret;
284
285 tt = container_of(work, struct iwl_mvm_tt_mgmt, ct_kill_exit.work);
286 mvm = container_of(tt, struct iwl_mvm, thermal_throttle);
287
288 if (iwl_mvm_is_tt_in_fw(mvm)) {
289 iwl_mvm_exit_ctkill(mvm);
290
291 return;
292 }
293
294 duration = tt->params.ct_kill_duration;
295
296 flush_work(&mvm->roc_done_wk);
297
298 mutex_lock(&mvm->mutex);
299
300 if (__iwl_mvm_mac_start(mvm))
301 goto reschedule;
302
303 ret = iwl_mvm_get_temp(mvm, &temp);
304
305 __iwl_mvm_mac_stop(mvm, false);
306
307 if (ret)
308 goto reschedule;
309
310 IWL_DEBUG_TEMP(mvm, "NIC temperature: %d\n", temp);
311
312 if (temp <= tt->params.ct_kill_exit) {
313 mutex_unlock(&mvm->mutex);
314 iwl_mvm_exit_ctkill(mvm);
315 return;
316 }
317
318 reschedule:
319 mutex_unlock(&mvm->mutex);
320 schedule_delayed_work(&mvm->thermal_throttle.ct_kill_exit,
321 round_jiffies(duration * HZ));
322 }
323
iwl_mvm_tt_smps_iterator(void * _data,u8 * mac,struct ieee80211_vif * vif)324 static void iwl_mvm_tt_smps_iterator(void *_data, u8 *mac,
325 struct ieee80211_vif *vif)
326 {
327 struct iwl_mvm *mvm = _data;
328 enum ieee80211_smps_mode smps_mode;
329
330 lockdep_assert_held(&mvm->mutex);
331
332 if (mvm->thermal_throttle.dynamic_smps)
333 smps_mode = IEEE80211_SMPS_DYNAMIC;
334 else
335 smps_mode = IEEE80211_SMPS_AUTOMATIC;
336
337 if (vif->type != NL80211_IFTYPE_STATION)
338 return;
339
340 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT, smps_mode, 0);
341 }
342
iwl_mvm_tt_tx_protection(struct iwl_mvm * mvm,bool enable)343 static void iwl_mvm_tt_tx_protection(struct iwl_mvm *mvm, bool enable)
344 {
345 struct iwl_mvm_sta *mvmsta;
346 int i, err;
347
348 for (i = 0; i < mvm->fw->ucode_capa.num_stations; i++) {
349 mvmsta = iwl_mvm_sta_from_staid_protected(mvm, i);
350 if (!mvmsta)
351 continue;
352
353 if (enable == mvmsta->tt_tx_protection)
354 continue;
355 err = iwl_mvm_tx_protection(mvm, mvmsta, enable);
356 if (err) {
357 IWL_ERR(mvm, "Failed to %s Tx protection\n",
358 enable ? "enable" : "disable");
359 } else {
360 IWL_DEBUG_TEMP(mvm, "%s Tx protection\n",
361 enable ? "Enable" : "Disable");
362 mvmsta->tt_tx_protection = enable;
363 }
364 }
365 }
366
iwl_mvm_tt_tx_backoff(struct iwl_mvm * mvm,u32 backoff)367 void iwl_mvm_tt_tx_backoff(struct iwl_mvm *mvm, u32 backoff)
368 {
369 struct iwl_host_cmd cmd = {
370 .id = REPLY_THERMAL_MNG_BACKOFF,
371 .len = { sizeof(u32), },
372 .data = { &backoff, },
373 };
374
375 backoff = max(backoff, mvm->thermal_throttle.min_backoff);
376
377 if (iwl_mvm_send_cmd(mvm, &cmd) == 0) {
378 IWL_DEBUG_TEMP(mvm, "Set Thermal Tx backoff to: %u\n",
379 backoff);
380 mvm->thermal_throttle.tx_backoff = backoff;
381 } else {
382 IWL_ERR(mvm, "Failed to change Thermal Tx backoff\n");
383 }
384 }
385
iwl_mvm_tt_handler(struct iwl_mvm * mvm)386 void iwl_mvm_tt_handler(struct iwl_mvm *mvm)
387 {
388 struct iwl_tt_params *params = &mvm->thermal_throttle.params;
389 struct iwl_mvm_tt_mgmt *tt = &mvm->thermal_throttle;
390 s32 temperature = mvm->temperature;
391 bool throttle_enable = false;
392 int i;
393 u32 tx_backoff;
394
395 IWL_DEBUG_TEMP(mvm, "NIC temperature: %d\n", mvm->temperature);
396
397 if (params->support_ct_kill && temperature >= params->ct_kill_entry) {
398 iwl_mvm_enter_ctkill(mvm);
399 return;
400 }
401
402 if (params->support_ct_kill &&
403 temperature <= params->ct_kill_exit) {
404 iwl_mvm_exit_ctkill(mvm);
405 return;
406 }
407
408 if (params->support_dynamic_smps) {
409 if (!tt->dynamic_smps &&
410 temperature >= params->dynamic_smps_entry) {
411 IWL_DEBUG_TEMP(mvm, "Enable dynamic SMPS\n");
412 tt->dynamic_smps = true;
413 ieee80211_iterate_active_interfaces_atomic(
414 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
415 iwl_mvm_tt_smps_iterator, mvm);
416 throttle_enable = true;
417 } else if (tt->dynamic_smps &&
418 temperature <= params->dynamic_smps_exit) {
419 IWL_DEBUG_TEMP(mvm, "Disable dynamic SMPS\n");
420 tt->dynamic_smps = false;
421 ieee80211_iterate_active_interfaces_atomic(
422 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
423 iwl_mvm_tt_smps_iterator, mvm);
424 }
425 }
426
427 if (params->support_tx_protection) {
428 if (temperature >= params->tx_protection_entry) {
429 iwl_mvm_tt_tx_protection(mvm, true);
430 throttle_enable = true;
431 } else if (temperature <= params->tx_protection_exit) {
432 iwl_mvm_tt_tx_protection(mvm, false);
433 }
434 }
435
436 if (params->support_tx_backoff) {
437 tx_backoff = tt->min_backoff;
438 for (i = 0; i < TT_TX_BACKOFF_SIZE; i++) {
439 if (temperature < params->tx_backoff[i].temperature)
440 break;
441 tx_backoff = max(tt->min_backoff,
442 params->tx_backoff[i].backoff);
443 }
444 if (tx_backoff != tt->min_backoff)
445 throttle_enable = true;
446 if (tt->tx_backoff != tx_backoff)
447 iwl_mvm_tt_tx_backoff(mvm, tx_backoff);
448 }
449
450 if (!tt->throttle && throttle_enable) {
451 IWL_WARN(mvm,
452 "Due to high temperature thermal throttling initiated\n");
453 tt->throttle = true;
454 } else if (tt->throttle && !tt->dynamic_smps &&
455 tt->tx_backoff == tt->min_backoff &&
456 temperature <= params->tx_protection_exit) {
457 IWL_WARN(mvm,
458 "Temperature is back to normal thermal throttling stopped\n");
459 tt->throttle = false;
460 }
461 }
462
463 static const struct iwl_tt_params iwl_mvm_default_tt_params = {
464 .ct_kill_entry = 118,
465 .ct_kill_exit = 96,
466 .ct_kill_duration = 5,
467 .dynamic_smps_entry = 114,
468 .dynamic_smps_exit = 110,
469 .tx_protection_entry = 114,
470 .tx_protection_exit = 108,
471 .tx_backoff = {
472 {.temperature = 112, .backoff = 200},
473 {.temperature = 113, .backoff = 600},
474 {.temperature = 114, .backoff = 1200},
475 {.temperature = 115, .backoff = 2000},
476 {.temperature = 116, .backoff = 4000},
477 {.temperature = 117, .backoff = 10000},
478 },
479 .support_ct_kill = true,
480 .support_dynamic_smps = true,
481 .support_tx_protection = true,
482 .support_tx_backoff = true,
483 };
484
iwl_mvm_ctdp_command(struct iwl_mvm * mvm,u32 op,u32 state)485 int iwl_mvm_ctdp_command(struct iwl_mvm *mvm, u32 op, u32 state)
486 {
487 struct iwl_ctdp_cmd cmd = {
488 .operation = cpu_to_le32(op),
489 .window_size = 0,
490 };
491 u32 budget;
492 int ret;
493 u32 status;
494
495 lockdep_assert_held(&mvm->mutex);
496
497 /* Do a linear scale from IWL_MVM_MIN_CTDP_BUDGET_MW to the configured
498 * maximum in the predefined number of steps.
499 */
500 budget = ((mvm->thermal_throttle.power_budget_mw -
501 IWL_MVM_MIN_CTDP_BUDGET_MW) *
502 (IWL_MVM_NUM_CTDP_STEPS - 1 - state)) /
503 (IWL_MVM_NUM_CTDP_STEPS - 1) +
504 IWL_MVM_MIN_CTDP_BUDGET_MW;
505 cmd.budget = cpu_to_le32(budget);
506
507 status = 0;
508 ret = iwl_mvm_send_cmd_pdu_status(mvm, WIDE_ID(PHY_OPS_GROUP,
509 CTDP_CONFIG_CMD),
510 sizeof(cmd), &cmd, &status);
511
512 if (ret) {
513 IWL_ERR(mvm, "cTDP command failed (err=%d)\n", ret);
514 return ret;
515 }
516
517 switch (op) {
518 case CTDP_CMD_OPERATION_START:
519 #ifdef CONFIG_THERMAL
520 mvm->cooling_dev.cur_state = state;
521 #endif /* CONFIG_THERMAL */
522 break;
523 case CTDP_CMD_OPERATION_REPORT:
524 IWL_DEBUG_TEMP(mvm, "cTDP avg energy in mWatt = %d\n", status);
525 /* when the function is called with CTDP_CMD_OPERATION_REPORT
526 * option the function should return the average budget value
527 * that is received from the FW.
528 * The budget can't be less or equal to 0, so it's possible
529 * to distinguish between error values and budgets.
530 */
531 return status;
532 case CTDP_CMD_OPERATION_STOP:
533 IWL_DEBUG_TEMP(mvm, "cTDP stopped successfully\n");
534 break;
535 }
536
537 return 0;
538 }
539
540 #ifdef CONFIG_THERMAL
compare_temps(const void * a,const void * b)541 static int compare_temps(const void *a, const void *b)
542 {
543 return ((s16)le16_to_cpu(*(const __le16 *)a) -
544 (s16)le16_to_cpu(*(const __le16 *)b));
545 }
546
547 struct iwl_trip_walk_data {
548 __le16 *thresholds;
549 int count;
550 };
551
iwl_trip_temp_cb(struct thermal_trip * trip,void * arg)552 static int iwl_trip_temp_cb(struct thermal_trip *trip, void *arg)
553 {
554 struct iwl_trip_walk_data *twd = arg;
555
556 if (trip->temperature == THERMAL_TEMP_INVALID)
557 return 0;
558
559 twd->thresholds[twd->count++] = cpu_to_le16((s16)(trip->temperature / 1000));
560 return 0;
561 }
562 #endif
563
iwl_mvm_send_temp_report_ths_cmd(struct iwl_mvm * mvm)564 int iwl_mvm_send_temp_report_ths_cmd(struct iwl_mvm *mvm)
565 {
566 struct temp_report_ths_cmd cmd = {0};
567 int ret;
568 #ifdef CONFIG_THERMAL
569 struct iwl_trip_walk_data twd = { .thresholds = cmd.thresholds, .count = 0 };
570
571 lockdep_assert_held(&mvm->mutex);
572
573 if (!mvm->tz_device.tzone)
574 goto send;
575
576 /*
577 * The thermal core holds an array of temperature trips that are
578 * unsorted and uncompressed, the FW should get it compressed and
579 * sorted.
580 */
581
582 /* compress trips to cmd array, remove uninitialized values*/
583 for_each_thermal_trip(mvm->tz_device.tzone, iwl_trip_temp_cb, &twd);
584
585 cmd.num_temps = cpu_to_le32(twd.count);
586 if (twd.count)
587 sort(cmd.thresholds, twd.count, sizeof(s16), compare_temps, NULL);
588
589 send:
590 #endif
591 ret = iwl_mvm_send_cmd_pdu(mvm, WIDE_ID(PHY_OPS_GROUP,
592 TEMP_REPORTING_THRESHOLDS_CMD),
593 0, sizeof(cmd), &cmd);
594 if (ret)
595 IWL_ERR(mvm, "TEMP_REPORT_THS_CMD command failed (err=%d)\n",
596 ret);
597
598 return ret;
599 }
600
601 #ifdef CONFIG_THERMAL
iwl_mvm_tzone_get_temp(struct thermal_zone_device * device,int * temperature)602 static int iwl_mvm_tzone_get_temp(struct thermal_zone_device *device,
603 int *temperature)
604 {
605 struct iwl_mvm *mvm = thermal_zone_device_priv(device);
606 int ret;
607 int temp;
608
609 guard(mvm)(mvm);
610
611 if (!iwl_mvm_firmware_running(mvm) ||
612 mvm->fwrt.cur_fw_img != IWL_UCODE_REGULAR) {
613 /*
614 * Tell the core that there is no valid temperature value to
615 * return, but it need not worry about this.
616 */
617 *temperature = THERMAL_TEMP_INVALID;
618 return 0;
619 }
620
621 ret = iwl_mvm_get_temp(mvm, &temp);
622 if (ret)
623 return ret;
624
625 *temperature = temp * 1000;
626 return 0;
627 }
628
iwl_mvm_tzone_set_trip_temp(struct thermal_zone_device * device,const struct thermal_trip * trip,int temp)629 static int iwl_mvm_tzone_set_trip_temp(struct thermal_zone_device *device,
630 const struct thermal_trip *trip, int temp)
631 {
632 struct iwl_mvm *mvm = thermal_zone_device_priv(device);
633
634 guard(mvm)(mvm);
635
636 if (!iwl_mvm_firmware_running(mvm) ||
637 mvm->fwrt.cur_fw_img != IWL_UCODE_REGULAR)
638 return -EIO;
639
640 if ((temp / 1000) > S16_MAX)
641 return -EINVAL;
642
643 return iwl_mvm_send_temp_report_ths_cmd(mvm);
644 }
645
646 static struct thermal_zone_device_ops tzone_ops = {
647 .get_temp = iwl_mvm_tzone_get_temp,
648 .set_trip_temp = iwl_mvm_tzone_set_trip_temp,
649 };
650
iwl_mvm_thermal_zone_register(struct iwl_mvm * mvm)651 static void iwl_mvm_thermal_zone_register(struct iwl_mvm *mvm)
652 {
653 int i, ret;
654 char name[16];
655 static atomic_t counter = ATOMIC_INIT(0);
656
657 if (!iwl_mvm_is_tt_in_fw(mvm)) {
658 mvm->tz_device.tzone = NULL;
659
660 return;
661 }
662
663 BUILD_BUG_ON(ARRAY_SIZE(name) >= THERMAL_NAME_LENGTH);
664
665 sprintf(name, "iwlwifi_%u", atomic_inc_return(&counter) & 0xFF);
666 /*
667 * 0 is a valid temperature,
668 * so initialize the array with S16_MIN which invalid temperature
669 */
670 for (i = 0 ; i < IWL_MAX_DTS_TRIPS; i++) {
671 mvm->tz_device.trips[i].temperature = THERMAL_TEMP_INVALID;
672 mvm->tz_device.trips[i].type = THERMAL_TRIP_PASSIVE;
673 mvm->tz_device.trips[i].flags = THERMAL_TRIP_FLAG_RW_TEMP;
674 }
675 mvm->tz_device.tzone = thermal_zone_device_register_with_trips(name,
676 mvm->tz_device.trips,
677 IWL_MAX_DTS_TRIPS,
678 mvm, &tzone_ops,
679 NULL, 0, 0);
680 if (IS_ERR(mvm->tz_device.tzone)) {
681 IWL_DEBUG_TEMP(mvm,
682 "Failed to register to thermal zone (err = %ld)\n",
683 PTR_ERR(mvm->tz_device.tzone));
684 mvm->tz_device.tzone = NULL;
685 return;
686 }
687
688 ret = thermal_zone_device_enable(mvm->tz_device.tzone);
689 if (ret) {
690 IWL_DEBUG_TEMP(mvm, "Failed to enable thermal zone\n");
691 thermal_zone_device_unregister(mvm->tz_device.tzone);
692 }
693 }
694
iwl_mvm_tcool_get_max_state(struct thermal_cooling_device * cdev,unsigned long * state)695 static int iwl_mvm_tcool_get_max_state(struct thermal_cooling_device *cdev,
696 unsigned long *state)
697 {
698 *state = IWL_MVM_NUM_CTDP_STEPS - 1;
699
700 return 0;
701 }
702
iwl_mvm_tcool_get_cur_state(struct thermal_cooling_device * cdev,unsigned long * state)703 static int iwl_mvm_tcool_get_cur_state(struct thermal_cooling_device *cdev,
704 unsigned long *state)
705 {
706 struct iwl_mvm *mvm = (struct iwl_mvm *)(cdev->devdata);
707
708 *state = mvm->cooling_dev.cur_state;
709
710 return 0;
711 }
712
iwl_mvm_tcool_set_cur_state(struct thermal_cooling_device * cdev,unsigned long new_state)713 static int iwl_mvm_tcool_set_cur_state(struct thermal_cooling_device *cdev,
714 unsigned long new_state)
715 {
716 struct iwl_mvm *mvm = (struct iwl_mvm *)(cdev->devdata);
717
718 guard(mvm)(mvm);
719
720 if (!iwl_mvm_firmware_running(mvm) ||
721 mvm->fwrt.cur_fw_img != IWL_UCODE_REGULAR)
722 return -EIO;
723
724 if (new_state >= IWL_MVM_NUM_CTDP_STEPS)
725 return -EINVAL;
726
727 return iwl_mvm_ctdp_command(mvm, CTDP_CMD_OPERATION_START,
728 new_state);
729 }
730
731 static const struct thermal_cooling_device_ops tcooling_ops = {
732 .get_max_state = iwl_mvm_tcool_get_max_state,
733 .get_cur_state = iwl_mvm_tcool_get_cur_state,
734 .set_cur_state = iwl_mvm_tcool_set_cur_state,
735 };
736
iwl_mvm_cooling_device_register(struct iwl_mvm * mvm)737 static void iwl_mvm_cooling_device_register(struct iwl_mvm *mvm)
738 {
739 char name[] = "iwlwifi";
740
741 if (!iwl_mvm_is_ctdp_supported(mvm))
742 return;
743
744 BUILD_BUG_ON(ARRAY_SIZE(name) >= THERMAL_NAME_LENGTH);
745
746 mvm->cooling_dev.cdev =
747 thermal_cooling_device_register(name,
748 mvm,
749 &tcooling_ops);
750
751 if (IS_ERR(mvm->cooling_dev.cdev)) {
752 IWL_DEBUG_TEMP(mvm,
753 "Failed to register to cooling device (err = %ld)\n",
754 PTR_ERR(mvm->cooling_dev.cdev));
755 mvm->cooling_dev.cdev = NULL;
756 return;
757 }
758 }
759
iwl_mvm_thermal_zone_unregister(struct iwl_mvm * mvm)760 static void iwl_mvm_thermal_zone_unregister(struct iwl_mvm *mvm)
761 {
762 if (!iwl_mvm_is_tt_in_fw(mvm) || !mvm->tz_device.tzone)
763 return;
764
765 IWL_DEBUG_TEMP(mvm, "Thermal zone device unregister\n");
766 if (mvm->tz_device.tzone) {
767 thermal_zone_device_unregister(mvm->tz_device.tzone);
768 mvm->tz_device.tzone = NULL;
769 }
770 }
771
iwl_mvm_cooling_device_unregister(struct iwl_mvm * mvm)772 static void iwl_mvm_cooling_device_unregister(struct iwl_mvm *mvm)
773 {
774 if (!iwl_mvm_is_ctdp_supported(mvm) || !mvm->cooling_dev.cdev)
775 return;
776
777 IWL_DEBUG_TEMP(mvm, "Cooling device unregister\n");
778 if (mvm->cooling_dev.cdev) {
779 thermal_cooling_device_unregister(mvm->cooling_dev.cdev);
780 mvm->cooling_dev.cdev = NULL;
781 }
782 }
783 #endif /* CONFIG_THERMAL */
784
iwl_mvm_ctdp_get_max_budget(struct iwl_mvm * mvm)785 static u32 iwl_mvm_ctdp_get_max_budget(struct iwl_mvm *mvm)
786 {
787 u64 bios_power_budget = 0;
788 u32 default_power_budget;
789
790 switch (CSR_HW_RFID_TYPE(mvm->trans->info.hw_rf_id)) {
791 case IWL_CFG_RF_TYPE_JF2:
792 case IWL_CFG_RF_TYPE_JF1:
793 default_power_budget = 2000;
794 break;
795 case IWL_CFG_RF_TYPE_HR2:
796 case IWL_CFG_RF_TYPE_HR1:
797 default_power_budget = 2400;
798 break;
799 case IWL_CFG_RF_TYPE_GF:
800 /* dual-radio devices have a higher budget */
801 if (CSR_HW_RFID_IS_CDB(mvm->trans->info.hw_rf_id))
802 default_power_budget = 5200;
803 else
804 default_power_budget = 2880;
805 break;
806 case IWL_CFG_RF_TYPE_FM:
807 default_power_budget = 3450;
808 break;
809 default:
810 default_power_budget = 5550;
811 break;
812 }
813
814 iwl_bios_get_pwr_limit(&mvm->fwrt, &bios_power_budget);
815
816 /* 32bit in UEFI, 16bit in ACPI; use BIOS value if it is in range */
817 if (bios_power_budget &&
818 bios_power_budget != 0xffff && bios_power_budget != 0xffffffff &&
819 bios_power_budget >= IWL_MVM_MIN_CTDP_BUDGET_MW &&
820 bios_power_budget <= default_power_budget)
821 return (u32)bios_power_budget;
822
823 return default_power_budget;
824 }
825
iwl_mvm_thermal_initialize(struct iwl_mvm * mvm,u32 min_backoff)826 void iwl_mvm_thermal_initialize(struct iwl_mvm *mvm, u32 min_backoff)
827 {
828 struct iwl_mvm_tt_mgmt *tt = &mvm->thermal_throttle;
829
830 IWL_DEBUG_TEMP(mvm, "Initialize Thermal Throttling\n");
831
832 if (mvm->cfg->thermal_params)
833 tt->params = *mvm->cfg->thermal_params;
834 else
835 tt->params = iwl_mvm_default_tt_params;
836
837 tt->power_budget_mw = iwl_mvm_ctdp_get_max_budget(mvm);
838 IWL_DEBUG_TEMP(mvm, "cTDP power budget: %d mW\n", tt->power_budget_mw);
839 tt->throttle = false;
840 tt->dynamic_smps = false;
841 tt->min_backoff = min_backoff;
842 INIT_DELAYED_WORK(&tt->ct_kill_exit, check_exit_ctkill);
843
844 #ifdef CONFIG_THERMAL
845 iwl_mvm_cooling_device_register(mvm);
846 iwl_mvm_thermal_zone_register(mvm);
847 #endif
848 mvm->init_status |= IWL_MVM_INIT_STATUS_THERMAL_INIT_COMPLETE;
849 }
850
iwl_mvm_thermal_exit(struct iwl_mvm * mvm)851 void iwl_mvm_thermal_exit(struct iwl_mvm *mvm)
852 {
853 if (!(mvm->init_status & IWL_MVM_INIT_STATUS_THERMAL_INIT_COMPLETE))
854 return;
855
856 cancel_delayed_work_sync(&mvm->thermal_throttle.ct_kill_exit);
857 IWL_DEBUG_TEMP(mvm, "Exit Thermal Throttling\n");
858
859 #ifdef CONFIG_THERMAL
860 iwl_mvm_cooling_device_unregister(mvm);
861 iwl_mvm_thermal_zone_unregister(mvm);
862 #endif
863 mvm->init_status &= ~IWL_MVM_INIT_STATUS_THERMAL_INIT_COMPLETE;
864 }
865