1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2 /*
3 * Copyright (C) 2012-2014, 2019-2020 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
164 iwl_mvm_enter_ctkill(mvm);
165 }
166
167 /*
168 * send the DTS_MEASUREMENT_TRIGGER command with or without waiting for a
169 * response. If we get a response then the measurement is stored in 'temp'
170 */
iwl_mvm_send_temp_cmd(struct iwl_mvm * mvm,bool response,s32 * temp)171 static int iwl_mvm_send_temp_cmd(struct iwl_mvm *mvm, bool response, s32 *temp)
172 {
173 struct iwl_host_cmd cmd = {};
174 struct iwl_dts_measurement_cmd dts_cmd = {
175 .flags = cpu_to_le32(DTS_TRIGGER_CMD_FLAGS_TEMP),
176 };
177 struct iwl_ext_dts_measurement_cmd ext_cmd = {
178 .control_mode = cpu_to_le32(DTS_DIRECT_WITHOUT_MEASURE),
179 };
180 struct iwl_dts_measurement_resp *resp;
181 void *cmd_ptr;
182 int ret;
183 u32 cmd_flags = 0;
184 u16 len;
185
186 /* Check which command format is used (regular/extended) */
187 if (fw_has_capa(&mvm->fw->ucode_capa,
188 IWL_UCODE_TLV_CAPA_EXTENDED_DTS_MEASURE)) {
189 len = sizeof(ext_cmd);
190 cmd_ptr = &ext_cmd;
191 } else {
192 len = sizeof(dts_cmd);
193 cmd_ptr = &dts_cmd;
194 }
195 /* The command version where we get a response is zero length */
196 if (response) {
197 cmd_flags = CMD_WANT_SKB;
198 len = 0;
199 }
200
201 cmd.id = WIDE_ID(PHY_OPS_GROUP, CMD_DTS_MEASUREMENT_TRIGGER_WIDE);
202 cmd.len[0] = len;
203 cmd.flags = cmd_flags;
204 cmd.data[0] = cmd_ptr;
205
206 IWL_DEBUG_TEMP(mvm,
207 "Sending temperature measurement command - %s response\n",
208 response ? "with" : "without");
209 ret = iwl_mvm_send_cmd(mvm, &cmd);
210
211 if (ret) {
212 IWL_ERR(mvm,
213 "Failed to send the temperature measurement command (err=%d)\n",
214 ret);
215 return ret;
216 }
217
218 if (response) {
219 resp = (void *)cmd.resp_pkt->data;
220 *temp = le32_to_cpu(resp->temp);
221 IWL_DEBUG_TEMP(mvm,
222 "Got temperature measurement response: temp=%d\n",
223 *temp);
224 iwl_free_resp(&cmd);
225 }
226
227 return ret;
228 }
229
iwl_mvm_get_temp(struct iwl_mvm * mvm,s32 * temp)230 int iwl_mvm_get_temp(struct iwl_mvm *mvm, s32 *temp)
231 {
232 struct iwl_notification_wait wait_temp_notif;
233 static u16 temp_notif[] = { WIDE_ID(PHY_OPS_GROUP,
234 DTS_MEASUREMENT_NOTIF_WIDE) };
235 int ret;
236 u8 cmd_ver;
237
238 /*
239 * If command version is 1 we send the command and immediately get
240 * a response. For older versions we send the command and wait for a
241 * notification (no command TLV for previous versions).
242 */
243 cmd_ver = iwl_fw_lookup_cmd_ver(mvm->fw, PHY_OPS_GROUP,
244 CMD_DTS_MEASUREMENT_TRIGGER_WIDE,
245 IWL_FW_CMD_VER_UNKNOWN);
246 if (cmd_ver == 1)
247 return iwl_mvm_send_temp_cmd(mvm, true, temp);
248
249 lockdep_assert_held(&mvm->mutex);
250
251 iwl_init_notification_wait(&mvm->notif_wait, &wait_temp_notif,
252 temp_notif, ARRAY_SIZE(temp_notif),
253 iwl_mvm_temp_notif_wait, temp);
254
255 ret = iwl_mvm_send_temp_cmd(mvm, false, temp);
256 if (ret) {
257 iwl_remove_notification(&mvm->notif_wait, &wait_temp_notif);
258 return ret;
259 }
260
261 ret = iwl_wait_notification(&mvm->notif_wait, &wait_temp_notif,
262 IWL_MVM_TEMP_NOTIF_WAIT_TIMEOUT);
263 if (ret)
264 IWL_WARN(mvm, "Getting the temperature timed out\n");
265
266 return ret;
267 }
268
check_exit_ctkill(struct work_struct * work)269 static void check_exit_ctkill(struct work_struct *work)
270 {
271 struct iwl_mvm_tt_mgmt *tt;
272 struct iwl_mvm *mvm;
273 u32 duration;
274 s32 temp;
275 int ret;
276
277 tt = container_of(work, struct iwl_mvm_tt_mgmt, ct_kill_exit.work);
278 mvm = container_of(tt, struct iwl_mvm, thermal_throttle);
279
280 if (iwl_mvm_is_tt_in_fw(mvm)) {
281 iwl_mvm_exit_ctkill(mvm);
282
283 return;
284 }
285
286 duration = tt->params.ct_kill_duration;
287
288 flush_work(&mvm->roc_done_wk);
289
290 mutex_lock(&mvm->mutex);
291
292 if (__iwl_mvm_mac_start(mvm))
293 goto reschedule;
294
295 ret = iwl_mvm_get_temp(mvm, &temp);
296
297 __iwl_mvm_mac_stop(mvm);
298
299 if (ret)
300 goto reschedule;
301
302 IWL_DEBUG_TEMP(mvm, "NIC temperature: %d\n", temp);
303
304 if (temp <= tt->params.ct_kill_exit) {
305 mutex_unlock(&mvm->mutex);
306 iwl_mvm_exit_ctkill(mvm);
307 return;
308 }
309
310 reschedule:
311 mutex_unlock(&mvm->mutex);
312 schedule_delayed_work(&mvm->thermal_throttle.ct_kill_exit,
313 round_jiffies(duration * HZ));
314 }
315
iwl_mvm_tt_smps_iterator(void * _data,u8 * mac,struct ieee80211_vif * vif)316 static void iwl_mvm_tt_smps_iterator(void *_data, u8 *mac,
317 struct ieee80211_vif *vif)
318 {
319 struct iwl_mvm *mvm = _data;
320 enum ieee80211_smps_mode smps_mode;
321
322 lockdep_assert_held(&mvm->mutex);
323
324 if (mvm->thermal_throttle.dynamic_smps)
325 smps_mode = IEEE80211_SMPS_DYNAMIC;
326 else
327 smps_mode = IEEE80211_SMPS_AUTOMATIC;
328
329 if (vif->type != NL80211_IFTYPE_STATION)
330 return;
331
332 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT, smps_mode);
333 }
334
iwl_mvm_tt_tx_protection(struct iwl_mvm * mvm,bool enable)335 static void iwl_mvm_tt_tx_protection(struct iwl_mvm *mvm, bool enable)
336 {
337 struct iwl_mvm_sta *mvmsta;
338 int i, err;
339
340 for (i = 0; i < mvm->fw->ucode_capa.num_stations; i++) {
341 mvmsta = iwl_mvm_sta_from_staid_protected(mvm, i);
342 if (!mvmsta)
343 continue;
344
345 if (enable == mvmsta->tt_tx_protection)
346 continue;
347 err = iwl_mvm_tx_protection(mvm, mvmsta, enable);
348 if (err) {
349 IWL_ERR(mvm, "Failed to %s Tx protection\n",
350 enable ? "enable" : "disable");
351 } else {
352 IWL_DEBUG_TEMP(mvm, "%s Tx protection\n",
353 enable ? "Enable" : "Disable");
354 mvmsta->tt_tx_protection = enable;
355 }
356 }
357 }
358
iwl_mvm_tt_tx_backoff(struct iwl_mvm * mvm,u32 backoff)359 void iwl_mvm_tt_tx_backoff(struct iwl_mvm *mvm, u32 backoff)
360 {
361 struct iwl_host_cmd cmd = {
362 .id = REPLY_THERMAL_MNG_BACKOFF,
363 .len = { sizeof(u32), },
364 .data = { &backoff, },
365 };
366
367 backoff = max(backoff, mvm->thermal_throttle.min_backoff);
368
369 if (iwl_mvm_send_cmd(mvm, &cmd) == 0) {
370 IWL_DEBUG_TEMP(mvm, "Set Thermal Tx backoff to: %u\n",
371 backoff);
372 mvm->thermal_throttle.tx_backoff = backoff;
373 } else {
374 IWL_ERR(mvm, "Failed to change Thermal Tx backoff\n");
375 }
376 }
377
iwl_mvm_tt_handler(struct iwl_mvm * mvm)378 void iwl_mvm_tt_handler(struct iwl_mvm *mvm)
379 {
380 struct iwl_tt_params *params = &mvm->thermal_throttle.params;
381 struct iwl_mvm_tt_mgmt *tt = &mvm->thermal_throttle;
382 s32 temperature = mvm->temperature;
383 bool throttle_enable = false;
384 int i;
385 u32 tx_backoff;
386
387 IWL_DEBUG_TEMP(mvm, "NIC temperature: %d\n", mvm->temperature);
388
389 if (params->support_ct_kill && temperature >= params->ct_kill_entry) {
390 iwl_mvm_enter_ctkill(mvm);
391 return;
392 }
393
394 if (params->support_ct_kill &&
395 temperature <= params->ct_kill_exit) {
396 iwl_mvm_exit_ctkill(mvm);
397 return;
398 }
399
400 if (params->support_dynamic_smps) {
401 if (!tt->dynamic_smps &&
402 temperature >= params->dynamic_smps_entry) {
403 IWL_DEBUG_TEMP(mvm, "Enable dynamic SMPS\n");
404 tt->dynamic_smps = true;
405 ieee80211_iterate_active_interfaces_atomic(
406 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
407 iwl_mvm_tt_smps_iterator, mvm);
408 throttle_enable = true;
409 } else if (tt->dynamic_smps &&
410 temperature <= params->dynamic_smps_exit) {
411 IWL_DEBUG_TEMP(mvm, "Disable dynamic SMPS\n");
412 tt->dynamic_smps = false;
413 ieee80211_iterate_active_interfaces_atomic(
414 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
415 iwl_mvm_tt_smps_iterator, mvm);
416 }
417 }
418
419 if (params->support_tx_protection) {
420 if (temperature >= params->tx_protection_entry) {
421 iwl_mvm_tt_tx_protection(mvm, true);
422 throttle_enable = true;
423 } else if (temperature <= params->tx_protection_exit) {
424 iwl_mvm_tt_tx_protection(mvm, false);
425 }
426 }
427
428 if (params->support_tx_backoff) {
429 tx_backoff = tt->min_backoff;
430 for (i = 0; i < TT_TX_BACKOFF_SIZE; i++) {
431 if (temperature < params->tx_backoff[i].temperature)
432 break;
433 tx_backoff = max(tt->min_backoff,
434 params->tx_backoff[i].backoff);
435 }
436 if (tx_backoff != tt->min_backoff)
437 throttle_enable = true;
438 if (tt->tx_backoff != tx_backoff)
439 iwl_mvm_tt_tx_backoff(mvm, tx_backoff);
440 }
441
442 if (!tt->throttle && throttle_enable) {
443 IWL_WARN(mvm,
444 "Due to high temperature thermal throttling initiated\n");
445 tt->throttle = true;
446 } else if (tt->throttle && !tt->dynamic_smps &&
447 tt->tx_backoff == tt->min_backoff &&
448 temperature <= params->tx_protection_exit) {
449 IWL_WARN(mvm,
450 "Temperature is back to normal thermal throttling stopped\n");
451 tt->throttle = false;
452 }
453 }
454
455 static const struct iwl_tt_params iwl_mvm_default_tt_params = {
456 .ct_kill_entry = 118,
457 .ct_kill_exit = 96,
458 .ct_kill_duration = 5,
459 .dynamic_smps_entry = 114,
460 .dynamic_smps_exit = 110,
461 .tx_protection_entry = 114,
462 .tx_protection_exit = 108,
463 .tx_backoff = {
464 {.temperature = 112, .backoff = 200},
465 {.temperature = 113, .backoff = 600},
466 {.temperature = 114, .backoff = 1200},
467 {.temperature = 115, .backoff = 2000},
468 {.temperature = 116, .backoff = 4000},
469 {.temperature = 117, .backoff = 10000},
470 },
471 .support_ct_kill = true,
472 .support_dynamic_smps = true,
473 .support_tx_protection = true,
474 .support_tx_backoff = true,
475 };
476
477 /* budget in mWatt */
478 static const u32 iwl_mvm_cdev_budgets[] = {
479 2400, /* cooling state 0 */
480 2000, /* cooling state 1 */
481 1800, /* cooling state 2 */
482 1600, /* cooling state 3 */
483 1400, /* cooling state 4 */
484 1200, /* cooling state 5 */
485 1000, /* cooling state 6 */
486 900, /* cooling state 7 */
487 800, /* cooling state 8 */
488 700, /* cooling state 9 */
489 650, /* cooling state 10 */
490 600, /* cooling state 11 */
491 550, /* cooling state 12 */
492 500, /* cooling state 13 */
493 450, /* cooling state 14 */
494 400, /* cooling state 15 */
495 350, /* cooling state 16 */
496 300, /* cooling state 17 */
497 250, /* cooling state 18 */
498 200, /* cooling state 19 */
499 150, /* cooling state 20 */
500 };
501
iwl_mvm_ctdp_command(struct iwl_mvm * mvm,u32 op,u32 state)502 int iwl_mvm_ctdp_command(struct iwl_mvm *mvm, u32 op, u32 state)
503 {
504 struct iwl_mvm_ctdp_cmd cmd = {
505 .operation = cpu_to_le32(op),
506 .budget = cpu_to_le32(iwl_mvm_cdev_budgets[state]),
507 .window_size = 0,
508 };
509 int ret;
510 u32 status;
511
512 lockdep_assert_held(&mvm->mutex);
513
514 status = 0;
515 ret = iwl_mvm_send_cmd_pdu_status(mvm, WIDE_ID(PHY_OPS_GROUP,
516 CTDP_CONFIG_CMD),
517 sizeof(cmd), &cmd, &status);
518
519 if (ret) {
520 IWL_ERR(mvm, "cTDP command failed (err=%d)\n", ret);
521 return ret;
522 }
523
524 switch (op) {
525 case CTDP_CMD_OPERATION_START:
526 #ifdef CONFIG_THERMAL
527 mvm->cooling_dev.cur_state = state;
528 #endif /* CONFIG_THERMAL */
529 break;
530 case CTDP_CMD_OPERATION_REPORT:
531 IWL_DEBUG_TEMP(mvm, "cTDP avg energy in mWatt = %d\n", status);
532 /* when the function is called with CTDP_CMD_OPERATION_REPORT
533 * option the function should return the average budget value
534 * that is received from the FW.
535 * The budget can't be less or equal to 0, so it's possible
536 * to distinguish between error values and budgets.
537 */
538 return status;
539 case CTDP_CMD_OPERATION_STOP:
540 IWL_DEBUG_TEMP(mvm, "cTDP stopped successfully\n");
541 break;
542 }
543
544 return 0;
545 }
546
547 #ifdef CONFIG_THERMAL
compare_temps(const void * a,const void * b)548 static int compare_temps(const void *a, const void *b)
549 {
550 return ((s16)le16_to_cpu(*(__le16 *)a) -
551 (s16)le16_to_cpu(*(__le16 *)b));
552 }
553 #endif
554
iwl_mvm_send_temp_report_ths_cmd(struct iwl_mvm * mvm)555 int iwl_mvm_send_temp_report_ths_cmd(struct iwl_mvm *mvm)
556 {
557 struct temp_report_ths_cmd cmd = {0};
558 int ret;
559 #ifdef CONFIG_THERMAL
560 int i, j, idx = 0;
561
562 lockdep_assert_held(&mvm->mutex);
563
564 if (!mvm->tz_device.tzone)
565 goto send;
566
567 /* The driver holds array of temperature trips that are unsorted
568 * and uncompressed, the FW should get it compressed and sorted
569 */
570
571 /* compress temp_trips to cmd array, remove uninitialized values*/
572 for (i = 0; i < IWL_MAX_DTS_TRIPS; i++) {
573 if (mvm->tz_device.temp_trips[i] != S16_MIN) {
574 cmd.thresholds[idx++] =
575 cpu_to_le16(mvm->tz_device.temp_trips[i]);
576 }
577 }
578 cmd.num_temps = cpu_to_le32(idx);
579
580 if (!idx)
581 goto send;
582
583 /*sort cmd array*/
584 sort(cmd.thresholds, idx, sizeof(s16), compare_temps, NULL);
585
586 /* we should save the indexes of trips because we sort
587 * and compress the orginal array
588 */
589 for (i = 0; i < idx; i++) {
590 for (j = 0; j < IWL_MAX_DTS_TRIPS; j++) {
591 if (le16_to_cpu(cmd.thresholds[i]) ==
592 mvm->tz_device.temp_trips[j])
593 mvm->tz_device.fw_trips_index[i] = j;
594 }
595 }
596
597 send:
598 #endif
599 ret = iwl_mvm_send_cmd_pdu(mvm, WIDE_ID(PHY_OPS_GROUP,
600 TEMP_REPORTING_THRESHOLDS_CMD),
601 0, sizeof(cmd), &cmd);
602 if (ret)
603 IWL_ERR(mvm, "TEMP_REPORT_THS_CMD command failed (err=%d)\n",
604 ret);
605
606 return ret;
607 }
608
609 #ifdef CONFIG_THERMAL
iwl_mvm_tzone_get_temp(struct thermal_zone_device * device,int * temperature)610 static int iwl_mvm_tzone_get_temp(struct thermal_zone_device *device,
611 int *temperature)
612 {
613 struct iwl_mvm *mvm = (struct iwl_mvm *)device->devdata;
614 int ret;
615 int temp;
616
617 mutex_lock(&mvm->mutex);
618
619 if (!iwl_mvm_firmware_running(mvm) ||
620 mvm->fwrt.cur_fw_img != IWL_UCODE_REGULAR) {
621 ret = -ENODATA;
622 goto out;
623 }
624
625 ret = iwl_mvm_get_temp(mvm, &temp);
626 if (ret)
627 goto out;
628
629 *temperature = temp * 1000;
630
631 out:
632 mutex_unlock(&mvm->mutex);
633 return ret;
634 }
635
iwl_mvm_tzone_get_trip_temp(struct thermal_zone_device * device,int trip,int * temp)636 static int iwl_mvm_tzone_get_trip_temp(struct thermal_zone_device *device,
637 int trip, int *temp)
638 {
639 struct iwl_mvm *mvm = (struct iwl_mvm *)device->devdata;
640
641 if (trip < 0 || trip >= IWL_MAX_DTS_TRIPS)
642 return -EINVAL;
643
644 *temp = mvm->tz_device.temp_trips[trip] * 1000;
645
646 return 0;
647 }
648
iwl_mvm_tzone_get_trip_type(struct thermal_zone_device * device,int trip,enum thermal_trip_type * type)649 static int iwl_mvm_tzone_get_trip_type(struct thermal_zone_device *device,
650 int trip, enum thermal_trip_type *type)
651 {
652 if (trip < 0 || trip >= IWL_MAX_DTS_TRIPS)
653 return -EINVAL;
654
655 *type = THERMAL_TRIP_PASSIVE;
656
657 return 0;
658 }
659
iwl_mvm_tzone_set_trip_temp(struct thermal_zone_device * device,int trip,int temp)660 static int iwl_mvm_tzone_set_trip_temp(struct thermal_zone_device *device,
661 int trip, int temp)
662 {
663 struct iwl_mvm *mvm = (struct iwl_mvm *)device->devdata;
664 struct iwl_mvm_thermal_device *tzone;
665 int i, ret;
666 s16 temperature;
667
668 mutex_lock(&mvm->mutex);
669
670 if (!iwl_mvm_firmware_running(mvm) ||
671 mvm->fwrt.cur_fw_img != IWL_UCODE_REGULAR) {
672 ret = -EIO;
673 goto out;
674 }
675
676 if (trip < 0 || trip >= IWL_MAX_DTS_TRIPS) {
677 ret = -EINVAL;
678 goto out;
679 }
680
681 if ((temp / 1000) > S16_MAX) {
682 ret = -EINVAL;
683 goto out;
684 }
685
686 temperature = (s16)(temp / 1000);
687 tzone = &mvm->tz_device;
688
689 if (!tzone) {
690 ret = -EIO;
691 goto out;
692 }
693
694 /* no updates*/
695 if (tzone->temp_trips[trip] == temperature) {
696 ret = 0;
697 goto out;
698 }
699
700 /* already existing temperature */
701 for (i = 0; i < IWL_MAX_DTS_TRIPS; i++) {
702 if (tzone->temp_trips[i] == temperature) {
703 ret = -EINVAL;
704 goto out;
705 }
706 }
707
708 tzone->temp_trips[trip] = temperature;
709
710 ret = iwl_mvm_send_temp_report_ths_cmd(mvm);
711 out:
712 mutex_unlock(&mvm->mutex);
713 return ret;
714 }
715
716 static struct thermal_zone_device_ops tzone_ops = {
717 .get_temp = iwl_mvm_tzone_get_temp,
718 .get_trip_temp = iwl_mvm_tzone_get_trip_temp,
719 .get_trip_type = iwl_mvm_tzone_get_trip_type,
720 .set_trip_temp = iwl_mvm_tzone_set_trip_temp,
721 };
722
723 /* make all trips writable */
724 #define IWL_WRITABLE_TRIPS_MSK (BIT(IWL_MAX_DTS_TRIPS) - 1)
725
iwl_mvm_thermal_zone_register(struct iwl_mvm * mvm)726 static void iwl_mvm_thermal_zone_register(struct iwl_mvm *mvm)
727 {
728 int i, ret;
729 char name[16];
730 static atomic_t counter = ATOMIC_INIT(0);
731
732 if (!iwl_mvm_is_tt_in_fw(mvm)) {
733 mvm->tz_device.tzone = NULL;
734
735 return;
736 }
737
738 BUILD_BUG_ON(ARRAY_SIZE(name) >= THERMAL_NAME_LENGTH);
739
740 sprintf(name, "iwlwifi_%u", atomic_inc_return(&counter) & 0xFF);
741 mvm->tz_device.tzone = thermal_zone_device_register(name,
742 IWL_MAX_DTS_TRIPS,
743 IWL_WRITABLE_TRIPS_MSK,
744 mvm, &tzone_ops,
745 NULL, 0, 0);
746 if (IS_ERR(mvm->tz_device.tzone)) {
747 IWL_DEBUG_TEMP(mvm,
748 "Failed to register to thermal zone (err = %ld)\n",
749 PTR_ERR(mvm->tz_device.tzone));
750 mvm->tz_device.tzone = NULL;
751 return;
752 }
753
754 ret = thermal_zone_device_enable(mvm->tz_device.tzone);
755 if (ret) {
756 IWL_DEBUG_TEMP(mvm, "Failed to enable thermal zone\n");
757 thermal_zone_device_unregister(mvm->tz_device.tzone);
758 return;
759 }
760
761 /* 0 is a valid temperature,
762 * so initialize the array with S16_MIN which invalid temperature
763 */
764 for (i = 0 ; i < IWL_MAX_DTS_TRIPS; i++)
765 mvm->tz_device.temp_trips[i] = S16_MIN;
766 }
767
iwl_mvm_tcool_get_max_state(struct thermal_cooling_device * cdev,unsigned long * state)768 static int iwl_mvm_tcool_get_max_state(struct thermal_cooling_device *cdev,
769 unsigned long *state)
770 {
771 *state = ARRAY_SIZE(iwl_mvm_cdev_budgets) - 1;
772
773 return 0;
774 }
775
iwl_mvm_tcool_get_cur_state(struct thermal_cooling_device * cdev,unsigned long * state)776 static int iwl_mvm_tcool_get_cur_state(struct thermal_cooling_device *cdev,
777 unsigned long *state)
778 {
779 struct iwl_mvm *mvm = (struct iwl_mvm *)(cdev->devdata);
780
781 *state = mvm->cooling_dev.cur_state;
782
783 return 0;
784 }
785
iwl_mvm_tcool_set_cur_state(struct thermal_cooling_device * cdev,unsigned long new_state)786 static int iwl_mvm_tcool_set_cur_state(struct thermal_cooling_device *cdev,
787 unsigned long new_state)
788 {
789 struct iwl_mvm *mvm = (struct iwl_mvm *)(cdev->devdata);
790 int ret;
791
792 mutex_lock(&mvm->mutex);
793
794 if (!iwl_mvm_firmware_running(mvm) ||
795 mvm->fwrt.cur_fw_img != IWL_UCODE_REGULAR) {
796 ret = -EIO;
797 goto unlock;
798 }
799
800 if (new_state >= ARRAY_SIZE(iwl_mvm_cdev_budgets)) {
801 ret = -EINVAL;
802 goto unlock;
803 }
804
805 ret = iwl_mvm_ctdp_command(mvm, CTDP_CMD_OPERATION_START,
806 new_state);
807
808 unlock:
809 mutex_unlock(&mvm->mutex);
810 return ret;
811 }
812
813 static const struct thermal_cooling_device_ops tcooling_ops = {
814 .get_max_state = iwl_mvm_tcool_get_max_state,
815 .get_cur_state = iwl_mvm_tcool_get_cur_state,
816 .set_cur_state = iwl_mvm_tcool_set_cur_state,
817 };
818
iwl_mvm_cooling_device_register(struct iwl_mvm * mvm)819 static void iwl_mvm_cooling_device_register(struct iwl_mvm *mvm)
820 {
821 char name[] = "iwlwifi";
822
823 if (!iwl_mvm_is_ctdp_supported(mvm))
824 return;
825
826 BUILD_BUG_ON(ARRAY_SIZE(name) >= THERMAL_NAME_LENGTH);
827
828 mvm->cooling_dev.cdev =
829 thermal_cooling_device_register(name,
830 mvm,
831 &tcooling_ops);
832
833 if (IS_ERR(mvm->cooling_dev.cdev)) {
834 IWL_DEBUG_TEMP(mvm,
835 "Failed to register to cooling device (err = %ld)\n",
836 PTR_ERR(mvm->cooling_dev.cdev));
837 mvm->cooling_dev.cdev = NULL;
838 return;
839 }
840 }
841
iwl_mvm_thermal_zone_unregister(struct iwl_mvm * mvm)842 static void iwl_mvm_thermal_zone_unregister(struct iwl_mvm *mvm)
843 {
844 if (!iwl_mvm_is_tt_in_fw(mvm) || !mvm->tz_device.tzone)
845 return;
846
847 IWL_DEBUG_TEMP(mvm, "Thermal zone device unregister\n");
848 if (mvm->tz_device.tzone) {
849 thermal_zone_device_unregister(mvm->tz_device.tzone);
850 mvm->tz_device.tzone = NULL;
851 }
852 }
853
iwl_mvm_cooling_device_unregister(struct iwl_mvm * mvm)854 static void iwl_mvm_cooling_device_unregister(struct iwl_mvm *mvm)
855 {
856 if (!iwl_mvm_is_ctdp_supported(mvm) || !mvm->cooling_dev.cdev)
857 return;
858
859 IWL_DEBUG_TEMP(mvm, "Cooling device unregister\n");
860 if (mvm->cooling_dev.cdev) {
861 thermal_cooling_device_unregister(mvm->cooling_dev.cdev);
862 mvm->cooling_dev.cdev = NULL;
863 }
864 }
865 #endif /* CONFIG_THERMAL */
866
iwl_mvm_thermal_initialize(struct iwl_mvm * mvm,u32 min_backoff)867 void iwl_mvm_thermal_initialize(struct iwl_mvm *mvm, u32 min_backoff)
868 {
869 struct iwl_mvm_tt_mgmt *tt = &mvm->thermal_throttle;
870
871 IWL_DEBUG_TEMP(mvm, "Initialize Thermal Throttling\n");
872
873 if (mvm->cfg->thermal_params)
874 tt->params = *mvm->cfg->thermal_params;
875 else
876 tt->params = iwl_mvm_default_tt_params;
877
878 tt->throttle = false;
879 tt->dynamic_smps = false;
880 tt->min_backoff = min_backoff;
881 INIT_DELAYED_WORK(&tt->ct_kill_exit, check_exit_ctkill);
882
883 #ifdef CONFIG_THERMAL
884 iwl_mvm_cooling_device_register(mvm);
885 iwl_mvm_thermal_zone_register(mvm);
886 #endif
887 mvm->init_status |= IWL_MVM_INIT_STATUS_THERMAL_INIT_COMPLETE;
888 }
889
iwl_mvm_thermal_exit(struct iwl_mvm * mvm)890 void iwl_mvm_thermal_exit(struct iwl_mvm *mvm)
891 {
892 if (!(mvm->init_status & IWL_MVM_INIT_STATUS_THERMAL_INIT_COMPLETE))
893 return;
894
895 cancel_delayed_work_sync(&mvm->thermal_throttle.ct_kill_exit);
896 IWL_DEBUG_TEMP(mvm, "Exit Thermal Throttling\n");
897
898 #ifdef CONFIG_THERMAL
899 iwl_mvm_cooling_device_unregister(mvm);
900 iwl_mvm_thermal_zone_unregister(mvm);
901 #endif
902 mvm->init_status &= ~IWL_MVM_INIT_STATUS_THERMAL_INIT_COMPLETE;
903 }
904
