1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2 /*
3 * Copyright (C) 2012-2014, 2019-2022 Intel Corporation
4 * Copyright (C) 2013-2014 Intel Mobile Communications GmbH
5 * Copyright (C) 2015-2016 Intel Deutschland GmbH
6 */
7 #ifdef CONFIG_THERMAL
8 #include <linux/sort.h>
9 #endif
10
11 #include "mvm.h"
12
13 #define IWL_MVM_TEMP_NOTIF_WAIT_TIMEOUT HZ
14
iwl_mvm_enter_ctkill(struct iwl_mvm * mvm)15 void iwl_mvm_enter_ctkill(struct iwl_mvm *mvm)
16 {
17 struct iwl_mvm_tt_mgmt *tt = &mvm->thermal_throttle;
18 u32 duration = tt->params.ct_kill_duration;
19
20 if (test_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status))
21 return;
22
23 IWL_ERR(mvm, "Enter CT Kill\n");
24 iwl_mvm_set_hw_ctkill_state(mvm, true);
25
26 if (!iwl_mvm_is_tt_in_fw(mvm)) {
27 tt->throttle = false;
28 tt->dynamic_smps = false;
29 }
30
31 /* Don't schedule an exit work if we're in test mode, since
32 * the temperature will not change unless we manually set it
33 * again (or disable testing).
34 */
35 if (!mvm->temperature_test)
36 schedule_delayed_work(&tt->ct_kill_exit,
37 round_jiffies_relative(duration * HZ));
38 }
39
iwl_mvm_exit_ctkill(struct iwl_mvm * mvm)40 static void iwl_mvm_exit_ctkill(struct iwl_mvm *mvm)
41 {
42 if (!test_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status))
43 return;
44
45 IWL_ERR(mvm, "Exit CT Kill\n");
46 iwl_mvm_set_hw_ctkill_state(mvm, false);
47 }
48
iwl_mvm_tt_temp_changed(struct iwl_mvm * mvm,u32 temp)49 static void iwl_mvm_tt_temp_changed(struct iwl_mvm *mvm, u32 temp)
50 {
51 /* ignore the notification if we are in test mode */
52 if (mvm->temperature_test)
53 return;
54
55 if (mvm->temperature == temp)
56 return;
57
58 mvm->temperature = temp;
59 iwl_mvm_tt_handler(mvm);
60 }
61
iwl_mvm_temp_notif_parse(struct iwl_mvm * mvm,struct iwl_rx_packet * pkt)62 static int iwl_mvm_temp_notif_parse(struct iwl_mvm *mvm,
63 struct iwl_rx_packet *pkt)
64 {
65 struct iwl_dts_measurement_notif_v1 *notif_v1;
66 int len = iwl_rx_packet_payload_len(pkt);
67 int temp;
68
69 /* we can use notif_v1 only, because v2 only adds an additional
70 * parameter, which is not used in this function.
71 */
72 if (WARN_ON_ONCE(len < sizeof(*notif_v1))) {
73 IWL_ERR(mvm, "Invalid DTS_MEASUREMENT_NOTIFICATION\n");
74 return -EINVAL;
75 }
76
77 notif_v1 = (void *)pkt->data;
78
79 temp = le32_to_cpu(notif_v1->temp);
80
81 /* shouldn't be negative, but since it's s32, make sure it isn't */
82 if (WARN_ON_ONCE(temp < 0))
83 temp = 0;
84
85 IWL_DEBUG_TEMP(mvm, "DTS_MEASUREMENT_NOTIFICATION - %d\n", temp);
86
87 return temp;
88 }
89
iwl_mvm_temp_notif_wait(struct iwl_notif_wait_data * notif_wait,struct iwl_rx_packet * pkt,void * data)90 static bool iwl_mvm_temp_notif_wait(struct iwl_notif_wait_data *notif_wait,
91 struct iwl_rx_packet *pkt, void *data)
92 {
93 struct iwl_mvm *mvm =
94 container_of(notif_wait, struct iwl_mvm, notif_wait);
95 int *temp = data;
96 int ret;
97
98 ret = iwl_mvm_temp_notif_parse(mvm, pkt);
99 if (ret < 0)
100 return true;
101
102 *temp = ret;
103
104 return true;
105 }
106
iwl_mvm_temp_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)107 void iwl_mvm_temp_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
108 {
109 struct iwl_rx_packet *pkt = rxb_addr(rxb);
110 struct iwl_dts_measurement_notif_v2 *notif_v2;
111 int len = iwl_rx_packet_payload_len(pkt);
112 int temp;
113 u32 ths_crossed;
114
115 /* the notification is handled synchronously in ctkill, so skip here */
116 if (test_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status))
117 return;
118
119 temp = iwl_mvm_temp_notif_parse(mvm, pkt);
120
121 if (!iwl_mvm_is_tt_in_fw(mvm)) {
122 if (temp >= 0)
123 iwl_mvm_tt_temp_changed(mvm, temp);
124 return;
125 }
126
127 if (WARN_ON_ONCE(len < sizeof(*notif_v2))) {
128 IWL_ERR(mvm, "Invalid DTS_MEASUREMENT_NOTIFICATION\n");
129 return;
130 }
131
132 notif_v2 = (void *)pkt->data;
133 ths_crossed = le32_to_cpu(notif_v2->threshold_idx);
134
135 /* 0xFF in ths_crossed means the notification is not related
136 * to a trip, so we can ignore it here.
137 */
138 if (ths_crossed == 0xFF)
139 return;
140
141 IWL_DEBUG_TEMP(mvm, "Temp = %d Threshold crossed = %d\n",
142 temp, ths_crossed);
143
144 #ifdef CONFIG_THERMAL
145 if (WARN_ON(ths_crossed >= IWL_MAX_DTS_TRIPS))
146 return;
147
148 if (mvm->tz_device.tzone) {
149 struct iwl_mvm_thermal_device *tz_dev = &mvm->tz_device;
150
151 thermal_zone_device_update(tz_dev->tzone,
152 THERMAL_TRIP_VIOLATED);
153 }
154 #endif /* CONFIG_THERMAL */
155 }
156
iwl_mvm_ct_kill_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)157 void iwl_mvm_ct_kill_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
158 {
159 struct iwl_rx_packet *pkt = rxb_addr(rxb);
160 struct ct_kill_notif *notif;
161
162 notif = (struct ct_kill_notif *)pkt->data;
163 IWL_DEBUG_TEMP(mvm, "CT Kill notification temperature = %d\n",
164 notif->temperature);
165 if (iwl_fw_lookup_notif_ver(mvm->fw, PHY_OPS_GROUP,
166 CT_KILL_NOTIFICATION, 0) > 1)
167 IWL_DEBUG_TEMP(mvm,
168 "CT kill notification DTS bitmap = 0x%x, Scheme = %d\n",
169 notif->dts, notif->scheme);
170
171 iwl_mvm_enter_ctkill(mvm);
172 }
173
174 /*
175 * send the DTS_MEASUREMENT_TRIGGER command with or without waiting for a
176 * response. If we get a response then the measurement is stored in 'temp'
177 */
iwl_mvm_send_temp_cmd(struct iwl_mvm * mvm,bool response,s32 * temp)178 static int iwl_mvm_send_temp_cmd(struct iwl_mvm *mvm, bool response, s32 *temp)
179 {
180 struct iwl_host_cmd cmd = {};
181 struct iwl_dts_measurement_cmd dts_cmd = {
182 .flags = cpu_to_le32(DTS_TRIGGER_CMD_FLAGS_TEMP),
183 };
184 struct iwl_ext_dts_measurement_cmd ext_cmd = {
185 .control_mode = cpu_to_le32(DTS_DIRECT_WITHOUT_MEASURE),
186 };
187 struct iwl_dts_measurement_resp *resp;
188 void *cmd_ptr;
189 int ret;
190 u32 cmd_flags = 0;
191 u16 len;
192
193 /* Check which command format is used (regular/extended) */
194 if (fw_has_capa(&mvm->fw->ucode_capa,
195 IWL_UCODE_TLV_CAPA_EXTENDED_DTS_MEASURE)) {
196 len = sizeof(ext_cmd);
197 cmd_ptr = &ext_cmd;
198 } else {
199 len = sizeof(dts_cmd);
200 cmd_ptr = &dts_cmd;
201 }
202 /* The command version where we get a response is zero length */
203 if (response) {
204 cmd_flags = CMD_WANT_SKB;
205 len = 0;
206 }
207
208 cmd.id = WIDE_ID(PHY_OPS_GROUP, CMD_DTS_MEASUREMENT_TRIGGER_WIDE);
209 cmd.len[0] = len;
210 cmd.flags = cmd_flags;
211 cmd.data[0] = cmd_ptr;
212
213 IWL_DEBUG_TEMP(mvm,
214 "Sending temperature measurement command - %s response\n",
215 response ? "with" : "without");
216 ret = iwl_mvm_send_cmd(mvm, &cmd);
217
218 if (ret) {
219 IWL_ERR(mvm,
220 "Failed to send the temperature measurement command (err=%d)\n",
221 ret);
222 return ret;
223 }
224
225 if (response) {
226 resp = (void *)cmd.resp_pkt->data;
227 *temp = le32_to_cpu(resp->temp);
228 IWL_DEBUG_TEMP(mvm,
229 "Got temperature measurement response: temp=%d\n",
230 *temp);
231 iwl_free_resp(&cmd);
232 }
233
234 return ret;
235 }
236
iwl_mvm_get_temp(struct iwl_mvm * mvm,s32 * temp)237 int iwl_mvm_get_temp(struct iwl_mvm *mvm, s32 *temp)
238 {
239 struct iwl_notification_wait wait_temp_notif;
240 static u16 temp_notif[] = { WIDE_ID(PHY_OPS_GROUP,
241 DTS_MEASUREMENT_NOTIF_WIDE) };
242 int ret;
243 u8 cmd_ver;
244
245 /*
246 * If command version is 1 we send the command and immediately get
247 * a response. For older versions we send the command and wait for a
248 * notification (no command TLV for previous versions).
249 */
250 cmd_ver = iwl_fw_lookup_cmd_ver(mvm->fw,
251 WIDE_ID(PHY_OPS_GROUP, CMD_DTS_MEASUREMENT_TRIGGER_WIDE),
252 IWL_FW_CMD_VER_UNKNOWN);
253 if (cmd_ver == 1)
254 return iwl_mvm_send_temp_cmd(mvm, true, temp);
255
256 lockdep_assert_held(&mvm->mutex);
257
258 iwl_init_notification_wait(&mvm->notif_wait, &wait_temp_notif,
259 temp_notif, ARRAY_SIZE(temp_notif),
260 iwl_mvm_temp_notif_wait, temp);
261
262 ret = iwl_mvm_send_temp_cmd(mvm, false, temp);
263 if (ret) {
264 iwl_remove_notification(&mvm->notif_wait, &wait_temp_notif);
265 return ret;
266 }
267
268 ret = iwl_wait_notification(&mvm->notif_wait, &wait_temp_notif,
269 IWL_MVM_TEMP_NOTIF_WAIT_TIMEOUT);
270 if (ret)
271 IWL_WARN(mvm, "Getting the temperature timed out\n");
272
273 return ret;
274 }
275
check_exit_ctkill(struct work_struct * work)276 static void check_exit_ctkill(struct work_struct *work)
277 {
278 struct iwl_mvm_tt_mgmt *tt;
279 struct iwl_mvm *mvm;
280 u32 duration;
281 s32 temp;
282 int ret;
283
284 tt = container_of(work, struct iwl_mvm_tt_mgmt, ct_kill_exit.work);
285 mvm = container_of(tt, struct iwl_mvm, thermal_throttle);
286
287 if (iwl_mvm_is_tt_in_fw(mvm)) {
288 iwl_mvm_exit_ctkill(mvm);
289
290 return;
291 }
292
293 duration = tt->params.ct_kill_duration;
294
295 flush_work(&mvm->roc_done_wk);
296
297 mutex_lock(&mvm->mutex);
298
299 if (__iwl_mvm_mac_start(mvm))
300 goto reschedule;
301
302 ret = iwl_mvm_get_temp(mvm, &temp);
303
304 __iwl_mvm_mac_stop(mvm);
305
306 if (ret)
307 goto reschedule;
308
309 IWL_DEBUG_TEMP(mvm, "NIC temperature: %d\n", temp);
310
311 if (temp <= tt->params.ct_kill_exit) {
312 mutex_unlock(&mvm->mutex);
313 iwl_mvm_exit_ctkill(mvm);
314 return;
315 }
316
317 reschedule:
318 mutex_unlock(&mvm->mutex);
319 schedule_delayed_work(&mvm->thermal_throttle.ct_kill_exit,
320 round_jiffies(duration * HZ));
321 }
322
iwl_mvm_tt_smps_iterator(void * _data,u8 * mac,struct ieee80211_vif * vif)323 static void iwl_mvm_tt_smps_iterator(void *_data, u8 *mac,
324 struct ieee80211_vif *vif)
325 {
326 struct iwl_mvm *mvm = _data;
327 enum ieee80211_smps_mode smps_mode;
328
329 lockdep_assert_held(&mvm->mutex);
330
331 if (mvm->thermal_throttle.dynamic_smps)
332 smps_mode = IEEE80211_SMPS_DYNAMIC;
333 else
334 smps_mode = IEEE80211_SMPS_AUTOMATIC;
335
336 if (vif->type != NL80211_IFTYPE_STATION)
337 return;
338
339 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT, smps_mode, 0);
340 }
341
iwl_mvm_tt_tx_protection(struct iwl_mvm * mvm,bool enable)342 static void iwl_mvm_tt_tx_protection(struct iwl_mvm *mvm, bool enable)
343 {
344 struct iwl_mvm_sta *mvmsta;
345 int i, err;
346
347 for (i = 0; i < mvm->fw->ucode_capa.num_stations; i++) {
348 mvmsta = iwl_mvm_sta_from_staid_protected(mvm, i);
349 if (!mvmsta)
350 continue;
351
352 if (enable == mvmsta->tt_tx_protection)
353 continue;
354 err = iwl_mvm_tx_protection(mvm, mvmsta, enable);
355 if (err) {
356 IWL_ERR(mvm, "Failed to %s Tx protection\n",
357 enable ? "enable" : "disable");
358 } else {
359 IWL_DEBUG_TEMP(mvm, "%s Tx protection\n",
360 enable ? "Enable" : "Disable");
361 mvmsta->tt_tx_protection = enable;
362 }
363 }
364 }
365
iwl_mvm_tt_tx_backoff(struct iwl_mvm * mvm,u32 backoff)366 void iwl_mvm_tt_tx_backoff(struct iwl_mvm *mvm, u32 backoff)
367 {
368 struct iwl_host_cmd cmd = {
369 .id = REPLY_THERMAL_MNG_BACKOFF,
370 .len = { sizeof(u32), },
371 .data = { &backoff, },
372 };
373
374 backoff = max(backoff, mvm->thermal_throttle.min_backoff);
375
376 if (iwl_mvm_send_cmd(mvm, &cmd) == 0) {
377 IWL_DEBUG_TEMP(mvm, "Set Thermal Tx backoff to: %u\n",
378 backoff);
379 mvm->thermal_throttle.tx_backoff = backoff;
380 } else {
381 IWL_ERR(mvm, "Failed to change Thermal Tx backoff\n");
382 }
383 }
384
iwl_mvm_tt_handler(struct iwl_mvm * mvm)385 void iwl_mvm_tt_handler(struct iwl_mvm *mvm)
386 {
387 struct iwl_tt_params *params = &mvm->thermal_throttle.params;
388 struct iwl_mvm_tt_mgmt *tt = &mvm->thermal_throttle;
389 s32 temperature = mvm->temperature;
390 bool throttle_enable = false;
391 int i;
392 u32 tx_backoff;
393
394 IWL_DEBUG_TEMP(mvm, "NIC temperature: %d\n", mvm->temperature);
395
396 if (params->support_ct_kill && temperature >= params->ct_kill_entry) {
397 iwl_mvm_enter_ctkill(mvm);
398 return;
399 }
400
401 if (params->support_ct_kill &&
402 temperature <= params->ct_kill_exit) {
403 iwl_mvm_exit_ctkill(mvm);
404 return;
405 }
406
407 if (params->support_dynamic_smps) {
408 if (!tt->dynamic_smps &&
409 temperature >= params->dynamic_smps_entry) {
410 IWL_DEBUG_TEMP(mvm, "Enable dynamic SMPS\n");
411 tt->dynamic_smps = true;
412 ieee80211_iterate_active_interfaces_atomic(
413 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
414 iwl_mvm_tt_smps_iterator, mvm);
415 throttle_enable = true;
416 } else if (tt->dynamic_smps &&
417 temperature <= params->dynamic_smps_exit) {
418 IWL_DEBUG_TEMP(mvm, "Disable dynamic SMPS\n");
419 tt->dynamic_smps = false;
420 ieee80211_iterate_active_interfaces_atomic(
421 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
422 iwl_mvm_tt_smps_iterator, mvm);
423 }
424 }
425
426 if (params->support_tx_protection) {
427 if (temperature >= params->tx_protection_entry) {
428 iwl_mvm_tt_tx_protection(mvm, true);
429 throttle_enable = true;
430 } else if (temperature <= params->tx_protection_exit) {
431 iwl_mvm_tt_tx_protection(mvm, false);
432 }
433 }
434
435 if (params->support_tx_backoff) {
436 tx_backoff = tt->min_backoff;
437 for (i = 0; i < TT_TX_BACKOFF_SIZE; i++) {
438 if (temperature < params->tx_backoff[i].temperature)
439 break;
440 tx_backoff = max(tt->min_backoff,
441 params->tx_backoff[i].backoff);
442 }
443 if (tx_backoff != tt->min_backoff)
444 throttle_enable = true;
445 if (tt->tx_backoff != tx_backoff)
446 iwl_mvm_tt_tx_backoff(mvm, tx_backoff);
447 }
448
449 if (!tt->throttle && throttle_enable) {
450 IWL_WARN(mvm,
451 "Due to high temperature thermal throttling initiated\n");
452 tt->throttle = true;
453 } else if (tt->throttle && !tt->dynamic_smps &&
454 tt->tx_backoff == tt->min_backoff &&
455 temperature <= params->tx_protection_exit) {
456 IWL_WARN(mvm,
457 "Temperature is back to normal thermal throttling stopped\n");
458 tt->throttle = false;
459 }
460 }
461
462 static const struct iwl_tt_params iwl_mvm_default_tt_params = {
463 .ct_kill_entry = 118,
464 .ct_kill_exit = 96,
465 .ct_kill_duration = 5,
466 .dynamic_smps_entry = 114,
467 .dynamic_smps_exit = 110,
468 .tx_protection_entry = 114,
469 .tx_protection_exit = 108,
470 .tx_backoff = {
471 {.temperature = 112, .backoff = 200},
472 {.temperature = 113, .backoff = 600},
473 {.temperature = 114, .backoff = 1200},
474 {.temperature = 115, .backoff = 2000},
475 {.temperature = 116, .backoff = 4000},
476 {.temperature = 117, .backoff = 10000},
477 },
478 .support_ct_kill = true,
479 .support_dynamic_smps = true,
480 .support_tx_protection = true,
481 .support_tx_backoff = true,
482 };
483
484 /* budget in mWatt */
485 static const u32 iwl_mvm_cdev_budgets[] = {
486 2400, /* cooling state 0 */
487 2000, /* cooling state 1 */
488 1800, /* cooling state 2 */
489 1600, /* cooling state 3 */
490 1400, /* cooling state 4 */
491 1200, /* cooling state 5 */
492 1000, /* cooling state 6 */
493 900, /* cooling state 7 */
494 800, /* cooling state 8 */
495 700, /* cooling state 9 */
496 650, /* cooling state 10 */
497 600, /* cooling state 11 */
498 550, /* cooling state 12 */
499 500, /* cooling state 13 */
500 450, /* cooling state 14 */
501 400, /* cooling state 15 */
502 350, /* cooling state 16 */
503 300, /* cooling state 17 */
504 250, /* cooling state 18 */
505 200, /* cooling state 19 */
506 150, /* cooling state 20 */
507 };
508
iwl_mvm_ctdp_command(struct iwl_mvm * mvm,u32 op,u32 state)509 int iwl_mvm_ctdp_command(struct iwl_mvm *mvm, u32 op, u32 state)
510 {
511 struct iwl_mvm_ctdp_cmd cmd = {
512 .operation = cpu_to_le32(op),
513 .budget = cpu_to_le32(iwl_mvm_cdev_budgets[state]),
514 .window_size = 0,
515 };
516 int ret;
517 u32 status;
518
519 lockdep_assert_held(&mvm->mutex);
520
521 status = 0;
522 ret = iwl_mvm_send_cmd_pdu_status(mvm, WIDE_ID(PHY_OPS_GROUP,
523 CTDP_CONFIG_CMD),
524 sizeof(cmd), &cmd, &status);
525
526 if (ret) {
527 IWL_ERR(mvm, "cTDP command failed (err=%d)\n", ret);
528 return ret;
529 }
530
531 switch (op) {
532 case CTDP_CMD_OPERATION_START:
533 #ifdef CONFIG_THERMAL
534 mvm->cooling_dev.cur_state = state;
535 #endif /* CONFIG_THERMAL */
536 break;
537 case CTDP_CMD_OPERATION_REPORT:
538 IWL_DEBUG_TEMP(mvm, "cTDP avg energy in mWatt = %d\n", status);
539 /* when the function is called with CTDP_CMD_OPERATION_REPORT
540 * option the function should return the average budget value
541 * that is received from the FW.
542 * The budget can't be less or equal to 0, so it's possible
543 * to distinguish between error values and budgets.
544 */
545 return status;
546 case CTDP_CMD_OPERATION_STOP:
547 IWL_DEBUG_TEMP(mvm, "cTDP stopped successfully\n");
548 break;
549 }
550
551 return 0;
552 }
553
554 #ifdef CONFIG_THERMAL
compare_temps(const void * a,const void * b)555 static int compare_temps(const void *a, const void *b)
556 {
557 return ((s16)le16_to_cpu(*(__le16 *)a) -
558 (s16)le16_to_cpu(*(__le16 *)b));
559 }
560 #endif
561
iwl_mvm_send_temp_report_ths_cmd(struct iwl_mvm * mvm)562 int iwl_mvm_send_temp_report_ths_cmd(struct iwl_mvm *mvm)
563 {
564 struct temp_report_ths_cmd cmd = {0};
565 int ret;
566 #ifdef CONFIG_THERMAL
567 int i, j, idx = 0;
568
569 lockdep_assert_held(&mvm->mutex);
570
571 if (!mvm->tz_device.tzone)
572 goto send;
573
574 /* The driver holds array of temperature trips that are unsorted
575 * and uncompressed, the FW should get it compressed and sorted
576 */
577
578 /* compress trips to cmd array, remove uninitialized values*/
579 for (i = 0; i < IWL_MAX_DTS_TRIPS; i++) {
580 if (mvm->tz_device.trips[i].temperature != INT_MIN) {
581 cmd.thresholds[idx++] =
582 cpu_to_le16((s16)(mvm->tz_device.trips[i].temperature / 1000));
583 }
584 }
585 cmd.num_temps = cpu_to_le32(idx);
586
587 if (!idx)
588 goto send;
589
590 /*sort cmd array*/
591 sort(cmd.thresholds, idx, sizeof(s16), compare_temps, NULL);
592
593 /* we should save the indexes of trips because we sort
594 * and compress the orginal array
595 */
596 for (i = 0; i < idx; i++) {
597 for (j = 0; j < IWL_MAX_DTS_TRIPS; j++) {
598 if ((int)(le16_to_cpu(cmd.thresholds[i]) * 1000) ==
599 mvm->tz_device.trips[j].temperature)
600 mvm->tz_device.fw_trips_index[i] = j;
601 }
602 }
603
604 send:
605 #endif
606 ret = iwl_mvm_send_cmd_pdu(mvm, WIDE_ID(PHY_OPS_GROUP,
607 TEMP_REPORTING_THRESHOLDS_CMD),
608 0, sizeof(cmd), &cmd);
609 if (ret)
610 IWL_ERR(mvm, "TEMP_REPORT_THS_CMD command failed (err=%d)\n",
611 ret);
612
613 return ret;
614 }
615
616 #ifdef CONFIG_THERMAL
iwl_mvm_tzone_get_temp(struct thermal_zone_device * device,int * temperature)617 static int iwl_mvm_tzone_get_temp(struct thermal_zone_device *device,
618 int *temperature)
619 {
620 struct iwl_mvm *mvm = thermal_zone_device_priv(device);
621 int ret;
622 int temp;
623
624 mutex_lock(&mvm->mutex);
625
626 if (!iwl_mvm_firmware_running(mvm) ||
627 mvm->fwrt.cur_fw_img != IWL_UCODE_REGULAR) {
628 ret = -ENODATA;
629 goto out;
630 }
631
632 ret = iwl_mvm_get_temp(mvm, &temp);
633 if (ret)
634 goto out;
635
636 *temperature = temp * 1000;
637
638 out:
639 mutex_unlock(&mvm->mutex);
640 return ret;
641 }
642
iwl_mvm_tzone_set_trip_temp(struct thermal_zone_device * device,int trip,int temp)643 static int iwl_mvm_tzone_set_trip_temp(struct thermal_zone_device *device,
644 int trip, int temp)
645 {
646 struct iwl_mvm *mvm = thermal_zone_device_priv(device);
647 struct iwl_mvm_thermal_device *tzone;
648 int ret;
649
650 mutex_lock(&mvm->mutex);
651
652 if (!iwl_mvm_firmware_running(mvm) ||
653 mvm->fwrt.cur_fw_img != IWL_UCODE_REGULAR) {
654 ret = -EIO;
655 goto out;
656 }
657
658 if ((temp / 1000) > S16_MAX) {
659 ret = -EINVAL;
660 goto out;
661 }
662
663 tzone = &mvm->tz_device;
664 if (!tzone) {
665 ret = -EIO;
666 goto out;
667 }
668
669 ret = iwl_mvm_send_temp_report_ths_cmd(mvm);
670 out:
671 mutex_unlock(&mvm->mutex);
672 return ret;
673 }
674
675 static struct thermal_zone_device_ops tzone_ops = {
676 .get_temp = iwl_mvm_tzone_get_temp,
677 .set_trip_temp = iwl_mvm_tzone_set_trip_temp,
678 };
679
680 /* make all trips writable */
681 #define IWL_WRITABLE_TRIPS_MSK (BIT(IWL_MAX_DTS_TRIPS) - 1)
682
iwl_mvm_thermal_zone_register(struct iwl_mvm * mvm)683 static void iwl_mvm_thermal_zone_register(struct iwl_mvm *mvm)
684 {
685 int i, ret;
686 char name[16];
687 static atomic_t counter = ATOMIC_INIT(0);
688
689 if (!iwl_mvm_is_tt_in_fw(mvm)) {
690 mvm->tz_device.tzone = NULL;
691
692 return;
693 }
694
695 BUILD_BUG_ON(ARRAY_SIZE(name) >= THERMAL_NAME_LENGTH);
696
697 sprintf(name, "iwlwifi_%u", atomic_inc_return(&counter) & 0xFF);
698 mvm->tz_device.tzone = thermal_zone_device_register_with_trips(name,
699 mvm->tz_device.trips,
700 IWL_MAX_DTS_TRIPS,
701 IWL_WRITABLE_TRIPS_MSK,
702 mvm, &tzone_ops,
703 NULL, 0, 0);
704 if (IS_ERR(mvm->tz_device.tzone)) {
705 IWL_DEBUG_TEMP(mvm,
706 "Failed to register to thermal zone (err = %ld)\n",
707 PTR_ERR(mvm->tz_device.tzone));
708 mvm->tz_device.tzone = NULL;
709 return;
710 }
711
712 ret = thermal_zone_device_enable(mvm->tz_device.tzone);
713 if (ret) {
714 IWL_DEBUG_TEMP(mvm, "Failed to enable thermal zone\n");
715 thermal_zone_device_unregister(mvm->tz_device.tzone);
716 return;
717 }
718
719 /* 0 is a valid temperature,
720 * so initialize the array with S16_MIN which invalid temperature
721 */
722 for (i = 0 ; i < IWL_MAX_DTS_TRIPS; i++) {
723 mvm->tz_device.trips[i].temperature = INT_MIN;
724 mvm->tz_device.trips[i].type = THERMAL_TRIP_PASSIVE;
725 }
726 }
727
iwl_mvm_tcool_get_max_state(struct thermal_cooling_device * cdev,unsigned long * state)728 static int iwl_mvm_tcool_get_max_state(struct thermal_cooling_device *cdev,
729 unsigned long *state)
730 {
731 *state = ARRAY_SIZE(iwl_mvm_cdev_budgets) - 1;
732
733 return 0;
734 }
735
iwl_mvm_tcool_get_cur_state(struct thermal_cooling_device * cdev,unsigned long * state)736 static int iwl_mvm_tcool_get_cur_state(struct thermal_cooling_device *cdev,
737 unsigned long *state)
738 {
739 struct iwl_mvm *mvm = (struct iwl_mvm *)(cdev->devdata);
740
741 *state = mvm->cooling_dev.cur_state;
742
743 return 0;
744 }
745
iwl_mvm_tcool_set_cur_state(struct thermal_cooling_device * cdev,unsigned long new_state)746 static int iwl_mvm_tcool_set_cur_state(struct thermal_cooling_device *cdev,
747 unsigned long new_state)
748 {
749 struct iwl_mvm *mvm = (struct iwl_mvm *)(cdev->devdata);
750 int ret;
751
752 mutex_lock(&mvm->mutex);
753
754 if (!iwl_mvm_firmware_running(mvm) ||
755 mvm->fwrt.cur_fw_img != IWL_UCODE_REGULAR) {
756 ret = -EIO;
757 goto unlock;
758 }
759
760 if (new_state >= ARRAY_SIZE(iwl_mvm_cdev_budgets)) {
761 ret = -EINVAL;
762 goto unlock;
763 }
764
765 ret = iwl_mvm_ctdp_command(mvm, CTDP_CMD_OPERATION_START,
766 new_state);
767
768 unlock:
769 mutex_unlock(&mvm->mutex);
770 return ret;
771 }
772
773 static const struct thermal_cooling_device_ops tcooling_ops = {
774 .get_max_state = iwl_mvm_tcool_get_max_state,
775 .get_cur_state = iwl_mvm_tcool_get_cur_state,
776 .set_cur_state = iwl_mvm_tcool_set_cur_state,
777 };
778
iwl_mvm_cooling_device_register(struct iwl_mvm * mvm)779 static void iwl_mvm_cooling_device_register(struct iwl_mvm *mvm)
780 {
781 char name[] = "iwlwifi";
782
783 if (!iwl_mvm_is_ctdp_supported(mvm))
784 return;
785
786 BUILD_BUG_ON(ARRAY_SIZE(name) >= THERMAL_NAME_LENGTH);
787
788 mvm->cooling_dev.cdev =
789 thermal_cooling_device_register(name,
790 mvm,
791 &tcooling_ops);
792
793 if (IS_ERR(mvm->cooling_dev.cdev)) {
794 IWL_DEBUG_TEMP(mvm,
795 "Failed to register to cooling device (err = %ld)\n",
796 PTR_ERR(mvm->cooling_dev.cdev));
797 mvm->cooling_dev.cdev = NULL;
798 return;
799 }
800 }
801
iwl_mvm_thermal_zone_unregister(struct iwl_mvm * mvm)802 static void iwl_mvm_thermal_zone_unregister(struct iwl_mvm *mvm)
803 {
804 if (!iwl_mvm_is_tt_in_fw(mvm) || !mvm->tz_device.tzone)
805 return;
806
807 IWL_DEBUG_TEMP(mvm, "Thermal zone device unregister\n");
808 if (mvm->tz_device.tzone) {
809 thermal_zone_device_unregister(mvm->tz_device.tzone);
810 mvm->tz_device.tzone = NULL;
811 }
812 }
813
iwl_mvm_cooling_device_unregister(struct iwl_mvm * mvm)814 static void iwl_mvm_cooling_device_unregister(struct iwl_mvm *mvm)
815 {
816 if (!iwl_mvm_is_ctdp_supported(mvm) || !mvm->cooling_dev.cdev)
817 return;
818
819 IWL_DEBUG_TEMP(mvm, "Cooling device unregister\n");
820 if (mvm->cooling_dev.cdev) {
821 thermal_cooling_device_unregister(mvm->cooling_dev.cdev);
822 mvm->cooling_dev.cdev = NULL;
823 }
824 }
825 #endif /* CONFIG_THERMAL */
826
iwl_mvm_thermal_initialize(struct iwl_mvm * mvm,u32 min_backoff)827 void iwl_mvm_thermal_initialize(struct iwl_mvm *mvm, u32 min_backoff)
828 {
829 struct iwl_mvm_tt_mgmt *tt = &mvm->thermal_throttle;
830
831 IWL_DEBUG_TEMP(mvm, "Initialize Thermal Throttling\n");
832
833 if (mvm->cfg->thermal_params)
834 tt->params = *mvm->cfg->thermal_params;
835 else
836 tt->params = iwl_mvm_default_tt_params;
837
838 tt->throttle = false;
839 tt->dynamic_smps = false;
840 tt->min_backoff = min_backoff;
841 INIT_DELAYED_WORK(&tt->ct_kill_exit, check_exit_ctkill);
842
843 #ifdef CONFIG_THERMAL
844 iwl_mvm_cooling_device_register(mvm);
845 iwl_mvm_thermal_zone_register(mvm);
846 #endif
847 mvm->init_status |= IWL_MVM_INIT_STATUS_THERMAL_INIT_COMPLETE;
848 }
849
iwl_mvm_thermal_exit(struct iwl_mvm * mvm)850 void iwl_mvm_thermal_exit(struct iwl_mvm *mvm)
851 {
852 if (!(mvm->init_status & IWL_MVM_INIT_STATUS_THERMAL_INIT_COMPLETE))
853 return;
854
855 cancel_delayed_work_sync(&mvm->thermal_throttle.ct_kill_exit);
856 IWL_DEBUG_TEMP(mvm, "Exit Thermal Throttling\n");
857
858 #ifdef CONFIG_THERMAL
859 iwl_mvm_cooling_device_unregister(mvm);
860 iwl_mvm_thermal_zone_unregister(mvm);
861 #endif
862 mvm->init_status &= ~IWL_MVM_INIT_STATUS_THERMAL_INIT_COMPLETE;
863 }
864