1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2 /*
3 * Copyright (C) 2012-2014, 2019-2022, 2024 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_TEMP_NOTIF_WAIT_TIMEOUT HZ
12
iwl_mvm_enter_ctkill(struct iwl_mvm * mvm)13 void iwl_mvm_enter_ctkill(struct iwl_mvm *mvm)
14 {
15 struct iwl_mvm_tt_mgmt *tt = &mvm->thermal_throttle;
16 u32 duration = tt->params.ct_kill_duration;
17
18 if (test_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status))
19 return;
20
21 IWL_ERR(mvm, "Enter CT Kill\n");
22 iwl_mvm_set_hw_ctkill_state(mvm, true);
23
24 if (!iwl_mvm_is_tt_in_fw(mvm)) {
25 tt->throttle = false;
26 tt->dynamic_smps = false;
27 }
28
29 /* Don't schedule an exit work if we're in test mode, since
30 * the temperature will not change unless we manually set it
31 * again (or disable testing).
32 */
33 if (!mvm->temperature_test)
34 schedule_delayed_work(&tt->ct_kill_exit,
35 round_jiffies_relative(duration * HZ));
36 }
37
iwl_mvm_exit_ctkill(struct iwl_mvm * mvm)38 static void iwl_mvm_exit_ctkill(struct iwl_mvm *mvm)
39 {
40 if (!test_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status))
41 return;
42
43 IWL_ERR(mvm, "Exit CT Kill\n");
44 iwl_mvm_set_hw_ctkill_state(mvm, false);
45 }
46
iwl_mvm_tt_temp_changed(struct iwl_mvm * mvm,u32 temp)47 static void iwl_mvm_tt_temp_changed(struct iwl_mvm *mvm, u32 temp)
48 {
49 /* ignore the notification if we are in test mode */
50 if (mvm->temperature_test)
51 return;
52
53 if (mvm->temperature == temp)
54 return;
55
56 mvm->temperature = temp;
57 iwl_mvm_tt_handler(mvm);
58 }
59
iwl_mvm_temp_notif_parse(struct iwl_mvm * mvm,struct iwl_rx_packet * pkt)60 static int iwl_mvm_temp_notif_parse(struct iwl_mvm *mvm,
61 struct iwl_rx_packet *pkt)
62 {
63 struct iwl_dts_measurement_notif_v1 *notif_v1;
64 int len = iwl_rx_packet_payload_len(pkt);
65 int temp;
66
67 /* we can use notif_v1 only, because v2 only adds an additional
68 * parameter, which is not used in this function.
69 */
70 if (WARN_ON_ONCE(len < sizeof(*notif_v1))) {
71 IWL_ERR(mvm, "Invalid DTS_MEASUREMENT_NOTIFICATION\n");
72 return -EINVAL;
73 }
74
75 notif_v1 = (void *)pkt->data;
76
77 temp = le32_to_cpu(notif_v1->temp);
78
79 /* shouldn't be negative, but since it's s32, make sure it isn't */
80 if (WARN_ON_ONCE(temp < 0))
81 temp = 0;
82
83 IWL_DEBUG_TEMP(mvm, "DTS_MEASUREMENT_NOTIFICATION - %d\n", temp);
84
85 return temp;
86 }
87
iwl_mvm_temp_notif_wait(struct iwl_notif_wait_data * notif_wait,struct iwl_rx_packet * pkt,void * data)88 static bool iwl_mvm_temp_notif_wait(struct iwl_notif_wait_data *notif_wait,
89 struct iwl_rx_packet *pkt, void *data)
90 {
91 struct iwl_mvm *mvm =
92 container_of(notif_wait, struct iwl_mvm, notif_wait);
93 int *temp = data;
94 int ret;
95
96 ret = iwl_mvm_temp_notif_parse(mvm, pkt);
97 if (ret < 0)
98 return true;
99
100 *temp = ret;
101
102 return true;
103 }
104
iwl_mvm_temp_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)105 void iwl_mvm_temp_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
106 {
107 struct iwl_rx_packet *pkt = rxb_addr(rxb);
108 struct iwl_dts_measurement_notif_v2 *notif_v2;
109 int len = iwl_rx_packet_payload_len(pkt);
110 int temp;
111 u32 ths_crossed;
112
113 /* the notification is handled synchronously in ctkill, so skip here */
114 if (test_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status))
115 return;
116
117 temp = iwl_mvm_temp_notif_parse(mvm, pkt);
118
119 if (!iwl_mvm_is_tt_in_fw(mvm)) {
120 if (temp >= 0)
121 iwl_mvm_tt_temp_changed(mvm, temp);
122 return;
123 }
124
125 if (WARN_ON_ONCE(len < sizeof(*notif_v2))) {
126 IWL_ERR(mvm, "Invalid DTS_MEASUREMENT_NOTIFICATION\n");
127 return;
128 }
129
130 notif_v2 = (void *)pkt->data;
131 ths_crossed = le32_to_cpu(notif_v2->threshold_idx);
132
133 /* 0xFF in ths_crossed means the notification is not related
134 * to a trip, so we can ignore it here.
135 */
136 if (ths_crossed == 0xFF)
137 return;
138
139 IWL_DEBUG_TEMP(mvm, "Temp = %d Threshold crossed = %d\n",
140 temp, ths_crossed);
141
142 #ifdef CONFIG_THERMAL
143 if (WARN_ON(ths_crossed >= IWL_MAX_DTS_TRIPS))
144 return;
145
146 if (mvm->tz_device.tzone) {
147 struct iwl_mvm_thermal_device *tz_dev = &mvm->tz_device;
148
149 thermal_zone_device_update(tz_dev->tzone,
150 THERMAL_TRIP_VIOLATED);
151 }
152 #endif /* CONFIG_THERMAL */
153 }
154
iwl_mvm_ct_kill_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)155 void iwl_mvm_ct_kill_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
156 {
157 struct iwl_rx_packet *pkt = rxb_addr(rxb);
158 struct ct_kill_notif *notif;
159
160 notif = (struct ct_kill_notif *)pkt->data;
161 IWL_DEBUG_TEMP(mvm, "CT Kill notification temperature = %d\n",
162 notif->temperature);
163 if (iwl_fw_lookup_notif_ver(mvm->fw, PHY_OPS_GROUP,
164 CT_KILL_NOTIFICATION, 0) > 1)
165 IWL_DEBUG_TEMP(mvm,
166 "CT kill notification DTS bitmap = 0x%x, Scheme = %d\n",
167 notif->dts, notif->scheme);
168
169 iwl_mvm_enter_ctkill(mvm);
170 }
171
172 /*
173 * send the DTS_MEASUREMENT_TRIGGER command with or without waiting for a
174 * response. If we get a response then the measurement is stored in 'temp'
175 */
iwl_mvm_send_temp_cmd(struct iwl_mvm * mvm,bool response,s32 * temp)176 static int iwl_mvm_send_temp_cmd(struct iwl_mvm *mvm, bool response, s32 *temp)
177 {
178 struct iwl_host_cmd cmd = {};
179 struct iwl_dts_measurement_cmd dts_cmd = {
180 .flags = cpu_to_le32(DTS_TRIGGER_CMD_FLAGS_TEMP),
181 };
182 struct iwl_ext_dts_measurement_cmd ext_cmd = {
183 .control_mode = cpu_to_le32(DTS_DIRECT_WITHOUT_MEASURE),
184 };
185 struct iwl_dts_measurement_resp *resp;
186 void *cmd_ptr;
187 int ret;
188 u32 cmd_flags = 0;
189 u16 len;
190
191 /* Check which command format is used (regular/extended) */
192 if (fw_has_capa(&mvm->fw->ucode_capa,
193 IWL_UCODE_TLV_CAPA_EXTENDED_DTS_MEASURE)) {
194 len = sizeof(ext_cmd);
195 cmd_ptr = &ext_cmd;
196 } else {
197 len = sizeof(dts_cmd);
198 cmd_ptr = &dts_cmd;
199 }
200 /* The command version where we get a response is zero length */
201 if (response) {
202 cmd_flags = CMD_WANT_SKB;
203 len = 0;
204 }
205
206 cmd.id = WIDE_ID(PHY_OPS_GROUP, CMD_DTS_MEASUREMENT_TRIGGER_WIDE);
207 cmd.len[0] = len;
208 cmd.flags = cmd_flags;
209 cmd.data[0] = cmd_ptr;
210
211 IWL_DEBUG_TEMP(mvm,
212 "Sending temperature measurement command - %s response\n",
213 response ? "with" : "without");
214 ret = iwl_mvm_send_cmd(mvm, &cmd);
215
216 if (ret) {
217 IWL_ERR(mvm,
218 "Failed to send the temperature measurement command (err=%d)\n",
219 ret);
220 return ret;
221 }
222
223 if (response) {
224 resp = (void *)cmd.resp_pkt->data;
225 *temp = le32_to_cpu(resp->temp);
226 IWL_DEBUG_TEMP(mvm,
227 "Got temperature measurement response: temp=%d\n",
228 *temp);
229 iwl_free_resp(&cmd);
230 }
231
232 return ret;
233 }
234
iwl_mvm_get_temp(struct iwl_mvm * mvm,s32 * temp)235 int iwl_mvm_get_temp(struct iwl_mvm *mvm, s32 *temp)
236 {
237 struct iwl_notification_wait wait_temp_notif;
238 static u16 temp_notif[] = { WIDE_ID(PHY_OPS_GROUP,
239 DTS_MEASUREMENT_NOTIF_WIDE) };
240 int ret;
241 u8 cmd_ver;
242
243 /*
244 * If command version is 1 we send the command and immediately get
245 * a response. For older versions we send the command and wait for a
246 * notification (no command TLV for previous versions).
247 */
248 cmd_ver = iwl_fw_lookup_cmd_ver(mvm->fw,
249 WIDE_ID(PHY_OPS_GROUP, CMD_DTS_MEASUREMENT_TRIGGER_WIDE),
250 IWL_FW_CMD_VER_UNKNOWN);
251 if (cmd_ver == 1)
252 return iwl_mvm_send_temp_cmd(mvm, true, temp);
253
254 lockdep_assert_held(&mvm->mutex);
255
256 iwl_init_notification_wait(&mvm->notif_wait, &wait_temp_notif,
257 temp_notif, ARRAY_SIZE(temp_notif),
258 iwl_mvm_temp_notif_wait, temp);
259
260 ret = iwl_mvm_send_temp_cmd(mvm, false, temp);
261 if (ret) {
262 iwl_remove_notification(&mvm->notif_wait, &wait_temp_notif);
263 return ret;
264 }
265
266 ret = iwl_wait_notification(&mvm->notif_wait, &wait_temp_notif,
267 IWL_MVM_TEMP_NOTIF_WAIT_TIMEOUT);
268 if (ret)
269 IWL_WARN(mvm, "Getting the temperature timed out\n");
270
271 return ret;
272 }
273
check_exit_ctkill(struct work_struct * work)274 static void check_exit_ctkill(struct work_struct *work)
275 {
276 struct iwl_mvm_tt_mgmt *tt;
277 struct iwl_mvm *mvm;
278 u32 duration;
279 s32 temp;
280 int ret;
281
282 tt = container_of(work, struct iwl_mvm_tt_mgmt, ct_kill_exit.work);
283 mvm = container_of(tt, struct iwl_mvm, thermal_throttle);
284
285 if (iwl_mvm_is_tt_in_fw(mvm)) {
286 iwl_mvm_exit_ctkill(mvm);
287
288 return;
289 }
290
291 duration = tt->params.ct_kill_duration;
292
293 flush_work(&mvm->roc_done_wk);
294
295 mutex_lock(&mvm->mutex);
296
297 if (__iwl_mvm_mac_start(mvm))
298 goto reschedule;
299
300 ret = iwl_mvm_get_temp(mvm, &temp);
301
302 __iwl_mvm_mac_stop(mvm, false);
303
304 if (ret)
305 goto reschedule;
306
307 IWL_DEBUG_TEMP(mvm, "NIC temperature: %d\n", temp);
308
309 if (temp <= tt->params.ct_kill_exit) {
310 mutex_unlock(&mvm->mutex);
311 iwl_mvm_exit_ctkill(mvm);
312 return;
313 }
314
315 reschedule:
316 mutex_unlock(&mvm->mutex);
317 schedule_delayed_work(&mvm->thermal_throttle.ct_kill_exit,
318 round_jiffies(duration * HZ));
319 }
320
iwl_mvm_tt_smps_iterator(void * _data,u8 * mac,struct ieee80211_vif * vif)321 static void iwl_mvm_tt_smps_iterator(void *_data, u8 *mac,
322 struct ieee80211_vif *vif)
323 {
324 struct iwl_mvm *mvm = _data;
325 enum ieee80211_smps_mode smps_mode;
326
327 lockdep_assert_held(&mvm->mutex);
328
329 if (mvm->thermal_throttle.dynamic_smps)
330 smps_mode = IEEE80211_SMPS_DYNAMIC;
331 else
332 smps_mode = IEEE80211_SMPS_AUTOMATIC;
333
334 if (vif->type != NL80211_IFTYPE_STATION)
335 return;
336
337 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT, smps_mode, 0);
338 }
339
iwl_mvm_tt_tx_protection(struct iwl_mvm * mvm,bool enable)340 static void iwl_mvm_tt_tx_protection(struct iwl_mvm *mvm, bool enable)
341 {
342 struct iwl_mvm_sta *mvmsta;
343 int i, err;
344
345 for (i = 0; i < mvm->fw->ucode_capa.num_stations; i++) {
346 mvmsta = iwl_mvm_sta_from_staid_protected(mvm, i);
347 if (!mvmsta)
348 continue;
349
350 if (enable == mvmsta->tt_tx_protection)
351 continue;
352 err = iwl_mvm_tx_protection(mvm, mvmsta, enable);
353 if (err) {
354 IWL_ERR(mvm, "Failed to %s Tx protection\n",
355 enable ? "enable" : "disable");
356 } else {
357 IWL_DEBUG_TEMP(mvm, "%s Tx protection\n",
358 enable ? "Enable" : "Disable");
359 mvmsta->tt_tx_protection = enable;
360 }
361 }
362 }
363
iwl_mvm_tt_tx_backoff(struct iwl_mvm * mvm,u32 backoff)364 void iwl_mvm_tt_tx_backoff(struct iwl_mvm *mvm, u32 backoff)
365 {
366 struct iwl_host_cmd cmd = {
367 .id = REPLY_THERMAL_MNG_BACKOFF,
368 .len = { sizeof(u32), },
369 .data = { &backoff, },
370 };
371
372 backoff = max(backoff, mvm->thermal_throttle.min_backoff);
373
374 if (iwl_mvm_send_cmd(mvm, &cmd) == 0) {
375 IWL_DEBUG_TEMP(mvm, "Set Thermal Tx backoff to: %u\n",
376 backoff);
377 mvm->thermal_throttle.tx_backoff = backoff;
378 } else {
379 IWL_ERR(mvm, "Failed to change Thermal Tx backoff\n");
380 }
381 }
382
iwl_mvm_tt_handler(struct iwl_mvm * mvm)383 void iwl_mvm_tt_handler(struct iwl_mvm *mvm)
384 {
385 struct iwl_tt_params *params = &mvm->thermal_throttle.params;
386 struct iwl_mvm_tt_mgmt *tt = &mvm->thermal_throttle;
387 s32 temperature = mvm->temperature;
388 bool throttle_enable = false;
389 int i;
390 u32 tx_backoff;
391
392 IWL_DEBUG_TEMP(mvm, "NIC temperature: %d\n", mvm->temperature);
393
394 if (params->support_ct_kill && temperature >= params->ct_kill_entry) {
395 iwl_mvm_enter_ctkill(mvm);
396 return;
397 }
398
399 if (params->support_ct_kill &&
400 temperature <= params->ct_kill_exit) {
401 iwl_mvm_exit_ctkill(mvm);
402 return;
403 }
404
405 if (params->support_dynamic_smps) {
406 if (!tt->dynamic_smps &&
407 temperature >= params->dynamic_smps_entry) {
408 IWL_DEBUG_TEMP(mvm, "Enable dynamic SMPS\n");
409 tt->dynamic_smps = true;
410 ieee80211_iterate_active_interfaces_atomic(
411 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
412 iwl_mvm_tt_smps_iterator, mvm);
413 throttle_enable = true;
414 } else if (tt->dynamic_smps &&
415 temperature <= params->dynamic_smps_exit) {
416 IWL_DEBUG_TEMP(mvm, "Disable dynamic SMPS\n");
417 tt->dynamic_smps = false;
418 ieee80211_iterate_active_interfaces_atomic(
419 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
420 iwl_mvm_tt_smps_iterator, mvm);
421 }
422 }
423
424 if (params->support_tx_protection) {
425 if (temperature >= params->tx_protection_entry) {
426 iwl_mvm_tt_tx_protection(mvm, true);
427 throttle_enable = true;
428 } else if (temperature <= params->tx_protection_exit) {
429 iwl_mvm_tt_tx_protection(mvm, false);
430 }
431 }
432
433 if (params->support_tx_backoff) {
434 tx_backoff = tt->min_backoff;
435 for (i = 0; i < TT_TX_BACKOFF_SIZE; i++) {
436 if (temperature < params->tx_backoff[i].temperature)
437 break;
438 tx_backoff = max(tt->min_backoff,
439 params->tx_backoff[i].backoff);
440 }
441 if (tx_backoff != tt->min_backoff)
442 throttle_enable = true;
443 if (tt->tx_backoff != tx_backoff)
444 iwl_mvm_tt_tx_backoff(mvm, tx_backoff);
445 }
446
447 if (!tt->throttle && throttle_enable) {
448 IWL_WARN(mvm,
449 "Due to high temperature thermal throttling initiated\n");
450 tt->throttle = true;
451 } else if (tt->throttle && !tt->dynamic_smps &&
452 tt->tx_backoff == tt->min_backoff &&
453 temperature <= params->tx_protection_exit) {
454 IWL_WARN(mvm,
455 "Temperature is back to normal thermal throttling stopped\n");
456 tt->throttle = false;
457 }
458 }
459
460 static const struct iwl_tt_params iwl_mvm_default_tt_params = {
461 .ct_kill_entry = 118,
462 .ct_kill_exit = 96,
463 .ct_kill_duration = 5,
464 .dynamic_smps_entry = 114,
465 .dynamic_smps_exit = 110,
466 .tx_protection_entry = 114,
467 .tx_protection_exit = 108,
468 .tx_backoff = {
469 {.temperature = 112, .backoff = 200},
470 {.temperature = 113, .backoff = 600},
471 {.temperature = 114, .backoff = 1200},
472 {.temperature = 115, .backoff = 2000},
473 {.temperature = 116, .backoff = 4000},
474 {.temperature = 117, .backoff = 10000},
475 },
476 .support_ct_kill = true,
477 .support_dynamic_smps = true,
478 .support_tx_protection = true,
479 .support_tx_backoff = true,
480 };
481
482 /* budget in mWatt */
483 static const u32 iwl_mvm_cdev_budgets[] = {
484 2400, /* cooling state 0 */
485 2000, /* cooling state 1 */
486 1800, /* cooling state 2 */
487 1600, /* cooling state 3 */
488 1400, /* cooling state 4 */
489 1200, /* cooling state 5 */
490 1000, /* cooling state 6 */
491 900, /* cooling state 7 */
492 800, /* cooling state 8 */
493 700, /* cooling state 9 */
494 650, /* cooling state 10 */
495 600, /* cooling state 11 */
496 550, /* cooling state 12 */
497 500, /* cooling state 13 */
498 450, /* cooling state 14 */
499 400, /* cooling state 15 */
500 350, /* cooling state 16 */
501 300, /* cooling state 17 */
502 250, /* cooling state 18 */
503 200, /* cooling state 19 */
504 150, /* cooling state 20 */
505 };
506
iwl_mvm_ctdp_command(struct iwl_mvm * mvm,u32 op,u32 state)507 int iwl_mvm_ctdp_command(struct iwl_mvm *mvm, u32 op, u32 state)
508 {
509 struct iwl_mvm_ctdp_cmd cmd = {
510 .operation = cpu_to_le32(op),
511 .budget = cpu_to_le32(iwl_mvm_cdev_budgets[state]),
512 .window_size = 0,
513 };
514 int ret;
515 u32 status;
516
517 lockdep_assert_held(&mvm->mutex);
518
519 status = 0;
520 ret = iwl_mvm_send_cmd_pdu_status(mvm, WIDE_ID(PHY_OPS_GROUP,
521 CTDP_CONFIG_CMD),
522 sizeof(cmd), &cmd, &status);
523
524 if (ret) {
525 IWL_ERR(mvm, "cTDP command failed (err=%d)\n", ret);
526 return ret;
527 }
528
529 switch (op) {
530 case CTDP_CMD_OPERATION_START:
531 #ifdef CONFIG_THERMAL
532 mvm->cooling_dev.cur_state = state;
533 #endif /* CONFIG_THERMAL */
534 break;
535 case CTDP_CMD_OPERATION_REPORT:
536 IWL_DEBUG_TEMP(mvm, "cTDP avg energy in mWatt = %d\n", status);
537 /* when the function is called with CTDP_CMD_OPERATION_REPORT
538 * option the function should return the average budget value
539 * that is received from the FW.
540 * The budget can't be less or equal to 0, so it's possible
541 * to distinguish between error values and budgets.
542 */
543 return status;
544 case CTDP_CMD_OPERATION_STOP:
545 IWL_DEBUG_TEMP(mvm, "cTDP stopped successfully\n");
546 break;
547 }
548
549 return 0;
550 }
551
552 #ifdef CONFIG_THERMAL
compare_temps(const void * a,const void * b)553 static int compare_temps(const void *a, const void *b)
554 {
555 return ((s16)le16_to_cpu(*(__le16 *)a) -
556 (s16)le16_to_cpu(*(__le16 *)b));
557 }
558
559 struct iwl_trip_walk_data {
560 __le16 *thresholds;
561 int count;
562 };
563
iwl_trip_temp_cb(struct thermal_trip * trip,void * arg)564 static int iwl_trip_temp_cb(struct thermal_trip *trip, void *arg)
565 {
566 struct iwl_trip_walk_data *twd = arg;
567
568 if (trip->temperature == THERMAL_TEMP_INVALID)
569 return 0;
570
571 twd->thresholds[twd->count++] = cpu_to_le16((s16)(trip->temperature / 1000));
572 return 0;
573 }
574 #endif
575
iwl_mvm_send_temp_report_ths_cmd(struct iwl_mvm * mvm)576 int iwl_mvm_send_temp_report_ths_cmd(struct iwl_mvm *mvm)
577 {
578 struct temp_report_ths_cmd cmd = {0};
579 int ret;
580 #ifdef CONFIG_THERMAL
581 struct iwl_trip_walk_data twd = { .thresholds = cmd.thresholds, .count = 0 };
582
583 lockdep_assert_held(&mvm->mutex);
584
585 if (!mvm->tz_device.tzone)
586 goto send;
587
588 /*
589 * The thermal core holds an array of temperature trips that are
590 * unsorted and uncompressed, the FW should get it compressed and
591 * sorted.
592 */
593
594 /* compress trips to cmd array, remove uninitialized values*/
595 for_each_thermal_trip(mvm->tz_device.tzone, iwl_trip_temp_cb, &twd);
596
597 cmd.num_temps = cpu_to_le32(twd.count);
598 if (twd.count)
599 sort(cmd.thresholds, twd.count, sizeof(s16), compare_temps, NULL);
600
601 send:
602 #endif
603 ret = iwl_mvm_send_cmd_pdu(mvm, WIDE_ID(PHY_OPS_GROUP,
604 TEMP_REPORTING_THRESHOLDS_CMD),
605 0, sizeof(cmd), &cmd);
606 if (ret)
607 IWL_ERR(mvm, "TEMP_REPORT_THS_CMD command failed (err=%d)\n",
608 ret);
609
610 return ret;
611 }
612
613 #ifdef CONFIG_THERMAL
iwl_mvm_tzone_get_temp(struct thermal_zone_device * device,int * temperature)614 static int iwl_mvm_tzone_get_temp(struct thermal_zone_device *device,
615 int *temperature)
616 {
617 struct iwl_mvm *mvm = thermal_zone_device_priv(device);
618 int ret;
619 int temp;
620
621 guard(mvm)(mvm);
622
623 if (!iwl_mvm_firmware_running(mvm) ||
624 mvm->fwrt.cur_fw_img != IWL_UCODE_REGULAR) {
625 /*
626 * Tell the core that there is no valid temperature value to
627 * return, but it need not worry about this.
628 */
629 *temperature = THERMAL_TEMP_INVALID;
630 return 0;
631 }
632
633 ret = iwl_mvm_get_temp(mvm, &temp);
634 if (ret)
635 return ret;
636
637 *temperature = temp * 1000;
638 return 0;
639 }
640
iwl_mvm_tzone_set_trip_temp(struct thermal_zone_device * device,const struct thermal_trip * trip,int temp)641 static int iwl_mvm_tzone_set_trip_temp(struct thermal_zone_device *device,
642 const struct thermal_trip *trip, int temp)
643 {
644 struct iwl_mvm *mvm = thermal_zone_device_priv(device);
645
646 guard(mvm)(mvm);
647
648 if (!iwl_mvm_firmware_running(mvm) ||
649 mvm->fwrt.cur_fw_img != IWL_UCODE_REGULAR)
650 return -EIO;
651
652 if ((temp / 1000) > S16_MAX)
653 return -EINVAL;
654
655 return iwl_mvm_send_temp_report_ths_cmd(mvm);
656 }
657
658 static struct thermal_zone_device_ops tzone_ops = {
659 .get_temp = iwl_mvm_tzone_get_temp,
660 .set_trip_temp = iwl_mvm_tzone_set_trip_temp,
661 };
662
iwl_mvm_thermal_zone_register(struct iwl_mvm * mvm)663 static void iwl_mvm_thermal_zone_register(struct iwl_mvm *mvm)
664 {
665 int i, ret;
666 char name[16];
667 static atomic_t counter = ATOMIC_INIT(0);
668
669 if (!iwl_mvm_is_tt_in_fw(mvm)) {
670 mvm->tz_device.tzone = NULL;
671
672 return;
673 }
674
675 BUILD_BUG_ON(ARRAY_SIZE(name) >= THERMAL_NAME_LENGTH);
676
677 sprintf(name, "iwlwifi_%u", atomic_inc_return(&counter) & 0xFF);
678 /*
679 * 0 is a valid temperature,
680 * so initialize the array with S16_MIN which invalid temperature
681 */
682 for (i = 0 ; i < IWL_MAX_DTS_TRIPS; i++) {
683 mvm->tz_device.trips[i].temperature = THERMAL_TEMP_INVALID;
684 mvm->tz_device.trips[i].type = THERMAL_TRIP_PASSIVE;
685 mvm->tz_device.trips[i].flags = THERMAL_TRIP_FLAG_RW_TEMP;
686 }
687 mvm->tz_device.tzone = thermal_zone_device_register_with_trips(name,
688 mvm->tz_device.trips,
689 IWL_MAX_DTS_TRIPS,
690 mvm, &tzone_ops,
691 NULL, 0, 0);
692 if (IS_ERR(mvm->tz_device.tzone)) {
693 IWL_DEBUG_TEMP(mvm,
694 "Failed to register to thermal zone (err = %ld)\n",
695 PTR_ERR(mvm->tz_device.tzone));
696 mvm->tz_device.tzone = NULL;
697 return;
698 }
699
700 ret = thermal_zone_device_enable(mvm->tz_device.tzone);
701 if (ret) {
702 IWL_DEBUG_TEMP(mvm, "Failed to enable thermal zone\n");
703 thermal_zone_device_unregister(mvm->tz_device.tzone);
704 }
705 }
706
iwl_mvm_tcool_get_max_state(struct thermal_cooling_device * cdev,unsigned long * state)707 static int iwl_mvm_tcool_get_max_state(struct thermal_cooling_device *cdev,
708 unsigned long *state)
709 {
710 *state = ARRAY_SIZE(iwl_mvm_cdev_budgets) - 1;
711
712 return 0;
713 }
714
iwl_mvm_tcool_get_cur_state(struct thermal_cooling_device * cdev,unsigned long * state)715 static int iwl_mvm_tcool_get_cur_state(struct thermal_cooling_device *cdev,
716 unsigned long *state)
717 {
718 struct iwl_mvm *mvm = (struct iwl_mvm *)(cdev->devdata);
719
720 *state = mvm->cooling_dev.cur_state;
721
722 return 0;
723 }
724
iwl_mvm_tcool_set_cur_state(struct thermal_cooling_device * cdev,unsigned long new_state)725 static int iwl_mvm_tcool_set_cur_state(struct thermal_cooling_device *cdev,
726 unsigned long new_state)
727 {
728 struct iwl_mvm *mvm = (struct iwl_mvm *)(cdev->devdata);
729
730 guard(mvm)(mvm);
731
732 if (!iwl_mvm_firmware_running(mvm) ||
733 mvm->fwrt.cur_fw_img != IWL_UCODE_REGULAR)
734 return -EIO;
735
736 if (new_state >= ARRAY_SIZE(iwl_mvm_cdev_budgets))
737 return -EINVAL;
738
739 return iwl_mvm_ctdp_command(mvm, CTDP_CMD_OPERATION_START,
740 new_state);
741 }
742
743 static const struct thermal_cooling_device_ops tcooling_ops = {
744 .get_max_state = iwl_mvm_tcool_get_max_state,
745 .get_cur_state = iwl_mvm_tcool_get_cur_state,
746 .set_cur_state = iwl_mvm_tcool_set_cur_state,
747 };
748
iwl_mvm_cooling_device_register(struct iwl_mvm * mvm)749 static void iwl_mvm_cooling_device_register(struct iwl_mvm *mvm)
750 {
751 char name[] = "iwlwifi";
752
753 if (!iwl_mvm_is_ctdp_supported(mvm))
754 return;
755
756 BUILD_BUG_ON(ARRAY_SIZE(name) >= THERMAL_NAME_LENGTH);
757
758 mvm->cooling_dev.cdev =
759 thermal_cooling_device_register(name,
760 mvm,
761 &tcooling_ops);
762
763 if (IS_ERR(mvm->cooling_dev.cdev)) {
764 IWL_DEBUG_TEMP(mvm,
765 "Failed to register to cooling device (err = %ld)\n",
766 PTR_ERR(mvm->cooling_dev.cdev));
767 mvm->cooling_dev.cdev = NULL;
768 return;
769 }
770 }
771
iwl_mvm_thermal_zone_unregister(struct iwl_mvm * mvm)772 static void iwl_mvm_thermal_zone_unregister(struct iwl_mvm *mvm)
773 {
774 if (!iwl_mvm_is_tt_in_fw(mvm) || !mvm->tz_device.tzone)
775 return;
776
777 IWL_DEBUG_TEMP(mvm, "Thermal zone device unregister\n");
778 if (mvm->tz_device.tzone) {
779 thermal_zone_device_unregister(mvm->tz_device.tzone);
780 mvm->tz_device.tzone = NULL;
781 }
782 }
783
iwl_mvm_cooling_device_unregister(struct iwl_mvm * mvm)784 static void iwl_mvm_cooling_device_unregister(struct iwl_mvm *mvm)
785 {
786 if (!iwl_mvm_is_ctdp_supported(mvm) || !mvm->cooling_dev.cdev)
787 return;
788
789 IWL_DEBUG_TEMP(mvm, "Cooling device unregister\n");
790 if (mvm->cooling_dev.cdev) {
791 thermal_cooling_device_unregister(mvm->cooling_dev.cdev);
792 mvm->cooling_dev.cdev = NULL;
793 }
794 }
795 #endif /* CONFIG_THERMAL */
796
iwl_mvm_thermal_initialize(struct iwl_mvm * mvm,u32 min_backoff)797 void iwl_mvm_thermal_initialize(struct iwl_mvm *mvm, u32 min_backoff)
798 {
799 struct iwl_mvm_tt_mgmt *tt = &mvm->thermal_throttle;
800
801 IWL_DEBUG_TEMP(mvm, "Initialize Thermal Throttling\n");
802
803 if (mvm->cfg->thermal_params)
804 tt->params = *mvm->cfg->thermal_params;
805 else
806 tt->params = iwl_mvm_default_tt_params;
807
808 tt->throttle = false;
809 tt->dynamic_smps = false;
810 tt->min_backoff = min_backoff;
811 INIT_DELAYED_WORK(&tt->ct_kill_exit, check_exit_ctkill);
812
813 #ifdef CONFIG_THERMAL
814 iwl_mvm_cooling_device_register(mvm);
815 iwl_mvm_thermal_zone_register(mvm);
816 #endif
817 mvm->init_status |= IWL_MVM_INIT_STATUS_THERMAL_INIT_COMPLETE;
818 }
819
iwl_mvm_thermal_exit(struct iwl_mvm * mvm)820 void iwl_mvm_thermal_exit(struct iwl_mvm *mvm)
821 {
822 if (!(mvm->init_status & IWL_MVM_INIT_STATUS_THERMAL_INIT_COMPLETE))
823 return;
824
825 cancel_delayed_work_sync(&mvm->thermal_throttle.ct_kill_exit);
826 IWL_DEBUG_TEMP(mvm, "Exit Thermal Throttling\n");
827
828 #ifdef CONFIG_THERMAL
829 iwl_mvm_cooling_device_unregister(mvm);
830 iwl_mvm_thermal_zone_unregister(mvm);
831 #endif
832 mvm->init_status &= ~IWL_MVM_INIT_STATUS_THERMAL_INIT_COMPLETE;
833 }
834