1 /******************************************************************************
2 *
3 * This file is provided under a dual BSD/GPLv2 license. When using or
4 * redistributing this file, you may do so under either license.
5 *
6 * GPL LICENSE SUMMARY
7 *
8 * Copyright(c) 2013 - 2014 Intel Corporation. All rights reserved.
9 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
10 * Copyright(c) 2015 - 2016 Intel Deutschland GmbH
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of version 2 of the GNU General Public License as
14 * published by the Free Software Foundation.
15 *
16 * This program is distributed in the hope that it will be useful, but
17 * WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
24 * USA
25 *
26 * The full GNU General Public License is included in this distribution
27 * in the file called COPYING.
28 *
29 * Contact Information:
30 * Intel Linux Wireless <linuxwifi@intel.com>
31 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
32 *
33 * BSD LICENSE
34 *
35 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
36 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
37 * Copyright(c) 2015 - 2016 Intel Deutschland GmbH
38 * All rights reserved.
39 *
40 * Redistribution and use in source and binary forms, with or without
41 * modification, are permitted provided that the following conditions
42 * are met:
43 *
44 * * Redistributions of source code must retain the above copyright
45 * notice, this list of conditions and the following disclaimer.
46 * * Redistributions in binary form must reproduce the above copyright
47 * notice, this list of conditions and the following disclaimer in
48 * the documentation and/or other materials provided with the
49 * distribution.
50 * * Neither the name Intel Corporation nor the names of its
51 * contributors may be used to endorse or promote products derived
52 * from this software without specific prior written permission.
53 *
54 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
55 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
56 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
57 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
58 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
59 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
60 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
61 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
62 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
63 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
64 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
65 *
66 *****************************************************************************/
67
68 #include <linux/sort.h>
69
70 #include "mvm.h"
71
72 #define IWL_MVM_TEMP_NOTIF_WAIT_TIMEOUT HZ
73
iwl_mvm_enter_ctkill(struct iwl_mvm * mvm)74 void iwl_mvm_enter_ctkill(struct iwl_mvm *mvm)
75 {
76 struct iwl_mvm_tt_mgmt *tt = &mvm->thermal_throttle;
77 u32 duration = tt->params.ct_kill_duration;
78
79 if (test_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status))
80 return;
81
82 IWL_ERR(mvm, "Enter CT Kill\n");
83 iwl_mvm_set_hw_ctkill_state(mvm, true);
84
85 if (!iwl_mvm_is_tt_in_fw(mvm)) {
86 tt->throttle = false;
87 tt->dynamic_smps = false;
88 }
89
90 /* Don't schedule an exit work if we're in test mode, since
91 * the temperature will not change unless we manually set it
92 * again (or disable testing).
93 */
94 if (!mvm->temperature_test)
95 schedule_delayed_work(&tt->ct_kill_exit,
96 round_jiffies_relative(duration * HZ));
97 }
98
iwl_mvm_exit_ctkill(struct iwl_mvm * mvm)99 static void iwl_mvm_exit_ctkill(struct iwl_mvm *mvm)
100 {
101 if (!test_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status))
102 return;
103
104 IWL_ERR(mvm, "Exit CT Kill\n");
105 iwl_mvm_set_hw_ctkill_state(mvm, false);
106 }
107
iwl_mvm_tt_temp_changed(struct iwl_mvm * mvm,u32 temp)108 void iwl_mvm_tt_temp_changed(struct iwl_mvm *mvm, u32 temp)
109 {
110 /* ignore the notification if we are in test mode */
111 if (mvm->temperature_test)
112 return;
113
114 if (mvm->temperature == temp)
115 return;
116
117 mvm->temperature = temp;
118 iwl_mvm_tt_handler(mvm);
119 }
120
iwl_mvm_temp_notif_parse(struct iwl_mvm * mvm,struct iwl_rx_packet * pkt)121 static int iwl_mvm_temp_notif_parse(struct iwl_mvm *mvm,
122 struct iwl_rx_packet *pkt)
123 {
124 struct iwl_dts_measurement_notif_v1 *notif_v1;
125 int len = iwl_rx_packet_payload_len(pkt);
126 int temp;
127
128 /* we can use notif_v1 only, because v2 only adds an additional
129 * parameter, which is not used in this function.
130 */
131 if (WARN_ON_ONCE(len < sizeof(*notif_v1))) {
132 IWL_ERR(mvm, "Invalid DTS_MEASUREMENT_NOTIFICATION\n");
133 return -EINVAL;
134 }
135
136 notif_v1 = (void *)pkt->data;
137
138 temp = le32_to_cpu(notif_v1->temp);
139
140 /* shouldn't be negative, but since it's s32, make sure it isn't */
141 if (WARN_ON_ONCE(temp < 0))
142 temp = 0;
143
144 IWL_DEBUG_TEMP(mvm, "DTS_MEASUREMENT_NOTIFICATION - %d\n", temp);
145
146 return temp;
147 }
148
iwl_mvm_temp_notif_wait(struct iwl_notif_wait_data * notif_wait,struct iwl_rx_packet * pkt,void * data)149 static bool iwl_mvm_temp_notif_wait(struct iwl_notif_wait_data *notif_wait,
150 struct iwl_rx_packet *pkt, void *data)
151 {
152 struct iwl_mvm *mvm =
153 container_of(notif_wait, struct iwl_mvm, notif_wait);
154 int *temp = data;
155 int ret;
156
157 ret = iwl_mvm_temp_notif_parse(mvm, pkt);
158 if (ret < 0)
159 return true;
160
161 *temp = ret;
162
163 return true;
164 }
165
iwl_mvm_temp_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)166 void iwl_mvm_temp_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
167 {
168 struct iwl_rx_packet *pkt = rxb_addr(rxb);
169 struct iwl_dts_measurement_notif_v2 *notif_v2;
170 int len = iwl_rx_packet_payload_len(pkt);
171 int temp;
172 u32 ths_crossed;
173
174 /* the notification is handled synchronously in ctkill, so skip here */
175 if (test_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status))
176 return;
177
178 temp = iwl_mvm_temp_notif_parse(mvm, pkt);
179
180 if (!iwl_mvm_is_tt_in_fw(mvm)) {
181 if (temp >= 0)
182 iwl_mvm_tt_temp_changed(mvm, temp);
183 return;
184 }
185
186 if (WARN_ON_ONCE(len < sizeof(*notif_v2))) {
187 IWL_ERR(mvm, "Invalid DTS_MEASUREMENT_NOTIFICATION\n");
188 return;
189 }
190
191 notif_v2 = (void *)pkt->data;
192 ths_crossed = le32_to_cpu(notif_v2->threshold_idx);
193
194 /* 0xFF in ths_crossed means the notification is not related
195 * to a trip, so we can ignore it here.
196 */
197 if (ths_crossed == 0xFF)
198 return;
199
200 IWL_DEBUG_TEMP(mvm, "Temp = %d Threshold crossed = %d\n",
201 temp, ths_crossed);
202
203 #ifdef CONFIG_THERMAL
204 if (WARN_ON(ths_crossed >= IWL_MAX_DTS_TRIPS))
205 return;
206
207 if (mvm->tz_device.tzone) {
208 struct iwl_mvm_thermal_device *tz_dev = &mvm->tz_device;
209
210 thermal_notify_framework(tz_dev->tzone,
211 tz_dev->fw_trips_index[ths_crossed]);
212 }
213 #endif /* CONFIG_THERMAL */
214 }
215
iwl_mvm_ct_kill_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)216 void iwl_mvm_ct_kill_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
217 {
218 struct iwl_rx_packet *pkt = rxb_addr(rxb);
219 struct ct_kill_notif *notif;
220 int len = iwl_rx_packet_payload_len(pkt);
221
222 if (WARN_ON_ONCE(len != sizeof(*notif))) {
223 IWL_ERR(mvm, "Invalid CT_KILL_NOTIFICATION\n");
224 return;
225 }
226
227 notif = (struct ct_kill_notif *)pkt->data;
228 IWL_DEBUG_TEMP(mvm, "CT Kill notification temperature = %d\n",
229 notif->temperature);
230
231 iwl_mvm_enter_ctkill(mvm);
232 }
233
iwl_mvm_get_temp_cmd(struct iwl_mvm * mvm)234 static int iwl_mvm_get_temp_cmd(struct iwl_mvm *mvm)
235 {
236 struct iwl_dts_measurement_cmd cmd = {
237 .flags = cpu_to_le32(DTS_TRIGGER_CMD_FLAGS_TEMP),
238 };
239 struct iwl_ext_dts_measurement_cmd extcmd = {
240 .control_mode = cpu_to_le32(DTS_AUTOMATIC),
241 };
242 u32 cmdid;
243
244 cmdid = iwl_cmd_id(CMD_DTS_MEASUREMENT_TRIGGER_WIDE,
245 PHY_OPS_GROUP, 0);
246
247 if (!fw_has_capa(&mvm->fw->ucode_capa,
248 IWL_UCODE_TLV_CAPA_EXTENDED_DTS_MEASURE))
249 return iwl_mvm_send_cmd_pdu(mvm, cmdid, 0, sizeof(cmd), &cmd);
250
251 return iwl_mvm_send_cmd_pdu(mvm, cmdid, 0, sizeof(extcmd), &extcmd);
252 }
253
iwl_mvm_get_temp(struct iwl_mvm * mvm,s32 * temp)254 int iwl_mvm_get_temp(struct iwl_mvm *mvm, s32 *temp)
255 {
256 struct iwl_notification_wait wait_temp_notif;
257 static u16 temp_notif[] = { WIDE_ID(PHY_OPS_GROUP,
258 DTS_MEASUREMENT_NOTIF_WIDE) };
259 int ret;
260
261 lockdep_assert_held(&mvm->mutex);
262
263 iwl_init_notification_wait(&mvm->notif_wait, &wait_temp_notif,
264 temp_notif, ARRAY_SIZE(temp_notif),
265 iwl_mvm_temp_notif_wait, temp);
266
267 ret = iwl_mvm_get_temp_cmd(mvm);
268 if (ret) {
269 IWL_ERR(mvm, "Failed to get the temperature (err=%d)\n", ret);
270 iwl_remove_notification(&mvm->notif_wait, &wait_temp_notif);
271 return ret;
272 }
273
274 ret = iwl_wait_notification(&mvm->notif_wait, &wait_temp_notif,
275 IWL_MVM_TEMP_NOTIF_WAIT_TIMEOUT);
276 if (ret)
277 IWL_ERR(mvm, "Getting the temperature timed out\n");
278
279 return ret;
280 }
281
check_exit_ctkill(struct work_struct * work)282 static void check_exit_ctkill(struct work_struct *work)
283 {
284 struct iwl_mvm_tt_mgmt *tt;
285 struct iwl_mvm *mvm;
286 u32 duration;
287 s32 temp;
288 int ret;
289
290 tt = container_of(work, struct iwl_mvm_tt_mgmt, ct_kill_exit.work);
291 mvm = container_of(tt, struct iwl_mvm, thermal_throttle);
292
293 if (iwl_mvm_is_tt_in_fw(mvm)) {
294 iwl_mvm_exit_ctkill(mvm);
295
296 return;
297 }
298
299 duration = tt->params.ct_kill_duration;
300
301 mutex_lock(&mvm->mutex);
302
303 if (__iwl_mvm_mac_start(mvm))
304 goto reschedule;
305
306 /* make sure the device is available for direct read/writes */
307 if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_CHECK_CTKILL)) {
308 __iwl_mvm_mac_stop(mvm);
309 goto reschedule;
310 }
311
312 ret = iwl_mvm_get_temp(mvm, &temp);
313
314 iwl_mvm_unref(mvm, IWL_MVM_REF_CHECK_CTKILL);
315
316 __iwl_mvm_mac_stop(mvm);
317
318 if (ret)
319 goto reschedule;
320
321 IWL_DEBUG_TEMP(mvm, "NIC temperature: %d\n", temp);
322
323 if (temp <= tt->params.ct_kill_exit) {
324 mutex_unlock(&mvm->mutex);
325 iwl_mvm_exit_ctkill(mvm);
326 return;
327 }
328
329 reschedule:
330 mutex_unlock(&mvm->mutex);
331 schedule_delayed_work(&mvm->thermal_throttle.ct_kill_exit,
332 round_jiffies(duration * HZ));
333 }
334
iwl_mvm_tt_smps_iterator(void * _data,u8 * mac,struct ieee80211_vif * vif)335 static void iwl_mvm_tt_smps_iterator(void *_data, u8 *mac,
336 struct ieee80211_vif *vif)
337 {
338 struct iwl_mvm *mvm = _data;
339 enum ieee80211_smps_mode smps_mode;
340
341 lockdep_assert_held(&mvm->mutex);
342
343 if (mvm->thermal_throttle.dynamic_smps)
344 smps_mode = IEEE80211_SMPS_DYNAMIC;
345 else
346 smps_mode = IEEE80211_SMPS_AUTOMATIC;
347
348 if (vif->type != NL80211_IFTYPE_STATION)
349 return;
350
351 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT, smps_mode);
352 }
353
iwl_mvm_tt_tx_protection(struct iwl_mvm * mvm,bool enable)354 static void iwl_mvm_tt_tx_protection(struct iwl_mvm *mvm, bool enable)
355 {
356 struct iwl_mvm_sta *mvmsta;
357 int i, err;
358
359 for (i = 0; i < ARRAY_SIZE(mvm->fw_id_to_mac_id); i++) {
360 mvmsta = iwl_mvm_sta_from_staid_protected(mvm, i);
361 if (!mvmsta)
362 continue;
363
364 if (enable == mvmsta->tt_tx_protection)
365 continue;
366 err = iwl_mvm_tx_protection(mvm, mvmsta, enable);
367 if (err) {
368 IWL_ERR(mvm, "Failed to %s Tx protection\n",
369 enable ? "enable" : "disable");
370 } else {
371 IWL_DEBUG_TEMP(mvm, "%s Tx protection\n",
372 enable ? "Enable" : "Disable");
373 mvmsta->tt_tx_protection = enable;
374 }
375 }
376 }
377
iwl_mvm_tt_tx_backoff(struct iwl_mvm * mvm,u32 backoff)378 void iwl_mvm_tt_tx_backoff(struct iwl_mvm *mvm, u32 backoff)
379 {
380 struct iwl_host_cmd cmd = {
381 .id = REPLY_THERMAL_MNG_BACKOFF,
382 .len = { sizeof(u32), },
383 .data = { &backoff, },
384 };
385
386 backoff = max(backoff, mvm->thermal_throttle.min_backoff);
387
388 if (iwl_mvm_send_cmd(mvm, &cmd) == 0) {
389 IWL_DEBUG_TEMP(mvm, "Set Thermal Tx backoff to: %u\n",
390 backoff);
391 mvm->thermal_throttle.tx_backoff = backoff;
392 } else {
393 IWL_ERR(mvm, "Failed to change Thermal Tx backoff\n");
394 }
395 }
396
iwl_mvm_tt_handler(struct iwl_mvm * mvm)397 void iwl_mvm_tt_handler(struct iwl_mvm *mvm)
398 {
399 struct iwl_tt_params *params = &mvm->thermal_throttle.params;
400 struct iwl_mvm_tt_mgmt *tt = &mvm->thermal_throttle;
401 s32 temperature = mvm->temperature;
402 bool throttle_enable = false;
403 int i;
404 u32 tx_backoff;
405
406 IWL_DEBUG_TEMP(mvm, "NIC temperature: %d\n", mvm->temperature);
407
408 if (params->support_ct_kill && temperature >= params->ct_kill_entry) {
409 iwl_mvm_enter_ctkill(mvm);
410 return;
411 }
412
413 if (params->support_ct_kill &&
414 temperature <= params->ct_kill_exit) {
415 iwl_mvm_exit_ctkill(mvm);
416 return;
417 }
418
419 if (params->support_dynamic_smps) {
420 if (!tt->dynamic_smps &&
421 temperature >= params->dynamic_smps_entry) {
422 IWL_DEBUG_TEMP(mvm, "Enable dynamic SMPS\n");
423 tt->dynamic_smps = true;
424 ieee80211_iterate_active_interfaces_atomic(
425 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
426 iwl_mvm_tt_smps_iterator, mvm);
427 throttle_enable = true;
428 } else if (tt->dynamic_smps &&
429 temperature <= params->dynamic_smps_exit) {
430 IWL_DEBUG_TEMP(mvm, "Disable dynamic SMPS\n");
431 tt->dynamic_smps = false;
432 ieee80211_iterate_active_interfaces_atomic(
433 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
434 iwl_mvm_tt_smps_iterator, mvm);
435 }
436 }
437
438 if (params->support_tx_protection) {
439 if (temperature >= params->tx_protection_entry) {
440 iwl_mvm_tt_tx_protection(mvm, true);
441 throttle_enable = true;
442 } else if (temperature <= params->tx_protection_exit) {
443 iwl_mvm_tt_tx_protection(mvm, false);
444 }
445 }
446
447 if (params->support_tx_backoff) {
448 tx_backoff = tt->min_backoff;
449 for (i = 0; i < TT_TX_BACKOFF_SIZE; i++) {
450 if (temperature < params->tx_backoff[i].temperature)
451 break;
452 tx_backoff = max(tt->min_backoff,
453 params->tx_backoff[i].backoff);
454 }
455 if (tx_backoff != tt->min_backoff)
456 throttle_enable = true;
457 if (tt->tx_backoff != tx_backoff)
458 iwl_mvm_tt_tx_backoff(mvm, tx_backoff);
459 }
460
461 if (!tt->throttle && throttle_enable) {
462 IWL_WARN(mvm,
463 "Due to high temperature thermal throttling initiated\n");
464 tt->throttle = true;
465 } else if (tt->throttle && !tt->dynamic_smps &&
466 tt->tx_backoff == tt->min_backoff &&
467 temperature <= params->tx_protection_exit) {
468 IWL_WARN(mvm,
469 "Temperature is back to normal thermal throttling stopped\n");
470 tt->throttle = false;
471 }
472 }
473
474 static const struct iwl_tt_params iwl_mvm_default_tt_params = {
475 .ct_kill_entry = 118,
476 .ct_kill_exit = 96,
477 .ct_kill_duration = 5,
478 .dynamic_smps_entry = 114,
479 .dynamic_smps_exit = 110,
480 .tx_protection_entry = 114,
481 .tx_protection_exit = 108,
482 .tx_backoff = {
483 {.temperature = 112, .backoff = 200},
484 {.temperature = 113, .backoff = 600},
485 {.temperature = 114, .backoff = 1200},
486 {.temperature = 115, .backoff = 2000},
487 {.temperature = 116, .backoff = 4000},
488 {.temperature = 117, .backoff = 10000},
489 },
490 .support_ct_kill = true,
491 .support_dynamic_smps = true,
492 .support_tx_protection = true,
493 .support_tx_backoff = true,
494 };
495
496 /* budget in mWatt */
497 static const u32 iwl_mvm_cdev_budgets[] = {
498 2000, /* cooling state 0 */
499 1800, /* cooling state 1 */
500 1600, /* cooling state 2 */
501 1400, /* cooling state 3 */
502 1200, /* cooling state 4 */
503 1000, /* cooling state 5 */
504 900, /* cooling state 6 */
505 800, /* cooling state 7 */
506 700, /* cooling state 8 */
507 650, /* cooling state 9 */
508 600, /* cooling state 10 */
509 550, /* cooling state 11 */
510 500, /* cooling state 12 */
511 450, /* cooling state 13 */
512 400, /* cooling state 14 */
513 350, /* cooling state 15 */
514 300, /* cooling state 16 */
515 250, /* cooling state 17 */
516 200, /* cooling state 18 */
517 150, /* cooling state 19 */
518 };
519
iwl_mvm_ctdp_command(struct iwl_mvm * mvm,u32 op,u32 state)520 int iwl_mvm_ctdp_command(struct iwl_mvm *mvm, u32 op, u32 state)
521 {
522 struct iwl_mvm_ctdp_cmd cmd = {
523 .operation = cpu_to_le32(op),
524 .budget = cpu_to_le32(iwl_mvm_cdev_budgets[state]),
525 .window_size = 0,
526 };
527 int ret;
528 u32 status;
529
530 lockdep_assert_held(&mvm->mutex);
531
532 status = 0;
533 ret = iwl_mvm_send_cmd_pdu_status(mvm, WIDE_ID(PHY_OPS_GROUP,
534 CTDP_CONFIG_CMD),
535 sizeof(cmd), &cmd, &status);
536
537 if (ret) {
538 IWL_ERR(mvm, "cTDP command failed (err=%d)\n", ret);
539 return ret;
540 }
541
542 switch (op) {
543 case CTDP_CMD_OPERATION_START:
544 #ifdef CONFIG_THERMAL
545 mvm->cooling_dev.cur_state = state;
546 #endif /* CONFIG_THERMAL */
547 break;
548 case CTDP_CMD_OPERATION_REPORT:
549 IWL_DEBUG_TEMP(mvm, "cTDP avg energy in mWatt = %d\n", status);
550 /* when the function is called with CTDP_CMD_OPERATION_REPORT
551 * option the function should return the average budget value
552 * that is received from the FW.
553 * The budget can't be less or equal to 0, so it's possible
554 * to distinguish between error values and budgets.
555 */
556 return status;
557 case CTDP_CMD_OPERATION_STOP:
558 IWL_DEBUG_TEMP(mvm, "cTDP stopped successfully\n");
559 break;
560 }
561
562 return 0;
563 }
564
565 #ifdef CONFIG_THERMAL
compare_temps(const void * a,const void * b)566 static int compare_temps(const void *a, const void *b)
567 {
568 return ((s16)le16_to_cpu(*(__le16 *)a) -
569 (s16)le16_to_cpu(*(__le16 *)b));
570 }
571
iwl_mvm_send_temp_report_ths_cmd(struct iwl_mvm * mvm)572 int iwl_mvm_send_temp_report_ths_cmd(struct iwl_mvm *mvm)
573 {
574 struct temp_report_ths_cmd cmd = {0};
575 int ret, i, j, idx = 0;
576
577 lockdep_assert_held(&mvm->mutex);
578
579 if (!mvm->tz_device.tzone)
580 return -EINVAL;
581
582 /* The driver holds array of temperature trips that are unsorted
583 * and uncompressed, the FW should get it compressed and sorted
584 */
585
586 /* compress temp_trips to cmd array, remove uninitialized values*/
587 for (i = 0; i < IWL_MAX_DTS_TRIPS; i++) {
588 if (mvm->tz_device.temp_trips[i] != S16_MIN) {
589 cmd.thresholds[idx++] =
590 cpu_to_le16(mvm->tz_device.temp_trips[i]);
591 }
592 }
593 cmd.num_temps = cpu_to_le32(idx);
594
595 if (!idx)
596 goto send;
597
598 /*sort cmd array*/
599 sort(cmd.thresholds, idx, sizeof(s16), compare_temps, NULL);
600
601 /* we should save the indexes of trips because we sort
602 * and compress the orginal array
603 */
604 for (i = 0; i < idx; i++) {
605 for (j = 0; j < IWL_MAX_DTS_TRIPS; j++) {
606 if (le16_to_cpu(cmd.thresholds[i]) ==
607 mvm->tz_device.temp_trips[j])
608 mvm->tz_device.fw_trips_index[i] = j;
609 }
610 }
611
612 send:
613 ret = iwl_mvm_send_cmd_pdu(mvm, WIDE_ID(PHY_OPS_GROUP,
614 TEMP_REPORTING_THRESHOLDS_CMD),
615 0, sizeof(cmd), &cmd);
616 if (ret)
617 IWL_ERR(mvm, "TEMP_REPORT_THS_CMD command failed (err=%d)\n",
618 ret);
619
620 return ret;
621 }
622
iwl_mvm_tzone_get_temp(struct thermal_zone_device * device,int * temperature)623 static int iwl_mvm_tzone_get_temp(struct thermal_zone_device *device,
624 int *temperature)
625 {
626 struct iwl_mvm *mvm = (struct iwl_mvm *)device->devdata;
627 int ret;
628 int temp;
629
630 mutex_lock(&mvm->mutex);
631
632 if (!iwl_mvm_firmware_running(mvm) ||
633 mvm->fwrt.cur_fw_img != IWL_UCODE_REGULAR) {
634 ret = -ENODATA;
635 goto out;
636 }
637
638 ret = iwl_mvm_get_temp(mvm, &temp);
639 if (ret)
640 goto out;
641
642 *temperature = temp * 1000;
643
644 out:
645 mutex_unlock(&mvm->mutex);
646 return ret;
647 }
648
iwl_mvm_tzone_get_trip_temp(struct thermal_zone_device * device,int trip,int * temp)649 static int iwl_mvm_tzone_get_trip_temp(struct thermal_zone_device *device,
650 int trip, int *temp)
651 {
652 struct iwl_mvm *mvm = (struct iwl_mvm *)device->devdata;
653
654 if (trip < 0 || trip >= IWL_MAX_DTS_TRIPS)
655 return -EINVAL;
656
657 *temp = mvm->tz_device.temp_trips[trip] * 1000;
658
659 return 0;
660 }
661
iwl_mvm_tzone_get_trip_type(struct thermal_zone_device * device,int trip,enum thermal_trip_type * type)662 static int iwl_mvm_tzone_get_trip_type(struct thermal_zone_device *device,
663 int trip, enum thermal_trip_type *type)
664 {
665 if (trip < 0 || trip >= IWL_MAX_DTS_TRIPS)
666 return -EINVAL;
667
668 *type = THERMAL_TRIP_PASSIVE;
669
670 return 0;
671 }
672
iwl_mvm_tzone_set_trip_temp(struct thermal_zone_device * device,int trip,int temp)673 static int iwl_mvm_tzone_set_trip_temp(struct thermal_zone_device *device,
674 int trip, int temp)
675 {
676 struct iwl_mvm *mvm = (struct iwl_mvm *)device->devdata;
677 struct iwl_mvm_thermal_device *tzone;
678 int i, ret;
679 s16 temperature;
680
681 mutex_lock(&mvm->mutex);
682
683 if (!iwl_mvm_firmware_running(mvm) ||
684 mvm->fwrt.cur_fw_img != IWL_UCODE_REGULAR) {
685 ret = -EIO;
686 goto out;
687 }
688
689 if (trip < 0 || trip >= IWL_MAX_DTS_TRIPS) {
690 ret = -EINVAL;
691 goto out;
692 }
693
694 if ((temp / 1000) > S16_MAX) {
695 ret = -EINVAL;
696 goto out;
697 }
698
699 temperature = (s16)(temp / 1000);
700 tzone = &mvm->tz_device;
701
702 if (!tzone) {
703 ret = -EIO;
704 goto out;
705 }
706
707 /* no updates*/
708 if (tzone->temp_trips[trip] == temperature) {
709 ret = 0;
710 goto out;
711 }
712
713 /* already existing temperature */
714 for (i = 0; i < IWL_MAX_DTS_TRIPS; i++) {
715 if (tzone->temp_trips[i] == temperature) {
716 ret = -EINVAL;
717 goto out;
718 }
719 }
720
721 tzone->temp_trips[trip] = temperature;
722
723 ret = iwl_mvm_send_temp_report_ths_cmd(mvm);
724 out:
725 mutex_unlock(&mvm->mutex);
726 return ret;
727 }
728
729 static struct thermal_zone_device_ops tzone_ops = {
730 .get_temp = iwl_mvm_tzone_get_temp,
731 .get_trip_temp = iwl_mvm_tzone_get_trip_temp,
732 .get_trip_type = iwl_mvm_tzone_get_trip_type,
733 .set_trip_temp = iwl_mvm_tzone_set_trip_temp,
734 };
735
736 /* make all trips writable */
737 #define IWL_WRITABLE_TRIPS_MSK (BIT(IWL_MAX_DTS_TRIPS) - 1)
738
iwl_mvm_thermal_zone_register(struct iwl_mvm * mvm)739 static void iwl_mvm_thermal_zone_register(struct iwl_mvm *mvm)
740 {
741 int i;
742 char name[] = "iwlwifi";
743
744 if (!iwl_mvm_is_tt_in_fw(mvm)) {
745 mvm->tz_device.tzone = NULL;
746
747 return;
748 }
749
750 BUILD_BUG_ON(ARRAY_SIZE(name) >= THERMAL_NAME_LENGTH);
751
752 mvm->tz_device.tzone = thermal_zone_device_register(name,
753 IWL_MAX_DTS_TRIPS,
754 IWL_WRITABLE_TRIPS_MSK,
755 mvm, &tzone_ops,
756 NULL, 0, 0);
757 if (IS_ERR(mvm->tz_device.tzone)) {
758 IWL_DEBUG_TEMP(mvm,
759 "Failed to register to thermal zone (err = %ld)\n",
760 PTR_ERR(mvm->tz_device.tzone));
761 mvm->tz_device.tzone = NULL;
762 return;
763 }
764
765 /* 0 is a valid temperature,
766 * so initialize the array with S16_MIN which invalid temperature
767 */
768 for (i = 0 ; i < IWL_MAX_DTS_TRIPS; i++)
769 mvm->tz_device.temp_trips[i] = S16_MIN;
770 }
771
iwl_mvm_tcool_get_max_state(struct thermal_cooling_device * cdev,unsigned long * state)772 static int iwl_mvm_tcool_get_max_state(struct thermal_cooling_device *cdev,
773 unsigned long *state)
774 {
775 *state = ARRAY_SIZE(iwl_mvm_cdev_budgets) - 1;
776
777 return 0;
778 }
779
iwl_mvm_tcool_get_cur_state(struct thermal_cooling_device * cdev,unsigned long * state)780 static int iwl_mvm_tcool_get_cur_state(struct thermal_cooling_device *cdev,
781 unsigned long *state)
782 {
783 struct iwl_mvm *mvm = (struct iwl_mvm *)(cdev->devdata);
784
785 *state = mvm->cooling_dev.cur_state;
786
787 return 0;
788 }
789
iwl_mvm_tcool_set_cur_state(struct thermal_cooling_device * cdev,unsigned long new_state)790 static int iwl_mvm_tcool_set_cur_state(struct thermal_cooling_device *cdev,
791 unsigned long new_state)
792 {
793 struct iwl_mvm *mvm = (struct iwl_mvm *)(cdev->devdata);
794 int ret;
795
796 mutex_lock(&mvm->mutex);
797
798 if (!iwl_mvm_firmware_running(mvm) ||
799 mvm->fwrt.cur_fw_img != IWL_UCODE_REGULAR) {
800 ret = -EIO;
801 goto unlock;
802 }
803
804 if (new_state >= ARRAY_SIZE(iwl_mvm_cdev_budgets)) {
805 ret = -EINVAL;
806 goto unlock;
807 }
808
809 ret = iwl_mvm_ctdp_command(mvm, CTDP_CMD_OPERATION_START,
810 new_state);
811
812 unlock:
813 mutex_unlock(&mvm->mutex);
814 return ret;
815 }
816
817 static const struct thermal_cooling_device_ops tcooling_ops = {
818 .get_max_state = iwl_mvm_tcool_get_max_state,
819 .get_cur_state = iwl_mvm_tcool_get_cur_state,
820 .set_cur_state = iwl_mvm_tcool_set_cur_state,
821 };
822
iwl_mvm_cooling_device_register(struct iwl_mvm * mvm)823 static void iwl_mvm_cooling_device_register(struct iwl_mvm *mvm)
824 {
825 char name[] = "iwlwifi";
826
827 if (!iwl_mvm_is_ctdp_supported(mvm))
828 return;
829
830 BUILD_BUG_ON(ARRAY_SIZE(name) >= THERMAL_NAME_LENGTH);
831
832 mvm->cooling_dev.cdev =
833 thermal_cooling_device_register(name,
834 mvm,
835 &tcooling_ops);
836
837 if (IS_ERR(mvm->cooling_dev.cdev)) {
838 IWL_DEBUG_TEMP(mvm,
839 "Failed to register to cooling device (err = %ld)\n",
840 PTR_ERR(mvm->cooling_dev.cdev));
841 mvm->cooling_dev.cdev = NULL;
842 return;
843 }
844 }
845
iwl_mvm_thermal_zone_unregister(struct iwl_mvm * mvm)846 static void iwl_mvm_thermal_zone_unregister(struct iwl_mvm *mvm)
847 {
848 if (!iwl_mvm_is_tt_in_fw(mvm) || !mvm->tz_device.tzone)
849 return;
850
851 IWL_DEBUG_TEMP(mvm, "Thermal zone device unregister\n");
852 if (mvm->tz_device.tzone) {
853 thermal_zone_device_unregister(mvm->tz_device.tzone);
854 mvm->tz_device.tzone = NULL;
855 }
856 }
857
iwl_mvm_cooling_device_unregister(struct iwl_mvm * mvm)858 static void iwl_mvm_cooling_device_unregister(struct iwl_mvm *mvm)
859 {
860 if (!iwl_mvm_is_ctdp_supported(mvm) || !mvm->cooling_dev.cdev)
861 return;
862
863 IWL_DEBUG_TEMP(mvm, "Cooling device unregister\n");
864 if (mvm->cooling_dev.cdev) {
865 thermal_cooling_device_unregister(mvm->cooling_dev.cdev);
866 mvm->cooling_dev.cdev = NULL;
867 }
868 }
869 #endif /* CONFIG_THERMAL */
870
iwl_mvm_thermal_initialize(struct iwl_mvm * mvm,u32 min_backoff)871 void iwl_mvm_thermal_initialize(struct iwl_mvm *mvm, u32 min_backoff)
872 {
873 struct iwl_mvm_tt_mgmt *tt = &mvm->thermal_throttle;
874
875 IWL_DEBUG_TEMP(mvm, "Initialize Thermal Throttling\n");
876
877 if (mvm->cfg->thermal_params)
878 tt->params = *mvm->cfg->thermal_params;
879 else
880 tt->params = iwl_mvm_default_tt_params;
881
882 tt->throttle = false;
883 tt->dynamic_smps = false;
884 tt->min_backoff = min_backoff;
885 INIT_DELAYED_WORK(&tt->ct_kill_exit, check_exit_ctkill);
886
887 #ifdef CONFIG_THERMAL
888 iwl_mvm_cooling_device_register(mvm);
889 iwl_mvm_thermal_zone_register(mvm);
890 #endif
891 mvm->init_status |= IWL_MVM_INIT_STATUS_THERMAL_INIT_COMPLETE;
892 }
893
iwl_mvm_thermal_exit(struct iwl_mvm * mvm)894 void iwl_mvm_thermal_exit(struct iwl_mvm *mvm)
895 {
896 if (!(mvm->init_status & IWL_MVM_INIT_STATUS_THERMAL_INIT_COMPLETE))
897 return;
898
899 cancel_delayed_work_sync(&mvm->thermal_throttle.ct_kill_exit);
900 IWL_DEBUG_TEMP(mvm, "Exit Thermal Throttling\n");
901
902 #ifdef CONFIG_THERMAL
903 iwl_mvm_cooling_device_unregister(mvm);
904 iwl_mvm_thermal_zone_unregister(mvm);
905 #endif
906 mvm->init_status &= ~IWL_MVM_INIT_STATUS_THERMAL_INIT_COMPLETE;
907 }
908
