1 // SPDX-License-Identifier: GPL-2.0-only
2 /******************************************************************************
3 *
4 * Copyright(c) 2007 - 2014 Intel Corporation. All rights reserved.
5 * Copyright (C) 2018, 2020 Intel Corporation
6 *
7 * Portions of this file are derived from the ipw3945 project, as well
8 * as portions of the ieee80211 subsystem header files.
9 *****************************************************************************/
10
11
12 #include <linux/kernel.h>
13 #include <linux/module.h>
14 #include <linux/slab.h>
15 #include <net/mac80211.h>
16 #include "iwl-io.h"
17 #include "iwl-modparams.h"
18 #include "iwl-debug.h"
19 #include "agn.h"
20 #include "dev.h"
21 #include "commands.h"
22 #include "tt.h"
23
24 /* default Thermal Throttling transaction table
25 * Current state | Throttling Down | Throttling Up
26 *=============================================================================
27 * Condition Nxt State Condition Nxt State Condition Nxt State
28 *-----------------------------------------------------------------------------
29 * IWL_TI_0 T >= 114 CT_KILL 114>T>=105 TI_1 N/A N/A
30 * IWL_TI_1 T >= 114 CT_KILL 114>T>=110 TI_2 T<=95 TI_0
31 * IWL_TI_2 T >= 114 CT_KILL T<=100 TI_1
32 * IWL_CT_KILL N/A N/A N/A N/A T<=95 TI_0
33 *=============================================================================
34 */
35 static const struct iwl_tt_trans tt_range_0[IWL_TI_STATE_MAX - 1] = {
36 {IWL_TI_0, IWL_ABSOLUTE_ZERO, 104},
37 {IWL_TI_1, 105, CT_KILL_THRESHOLD - 1},
38 {IWL_TI_CT_KILL, CT_KILL_THRESHOLD, IWL_ABSOLUTE_MAX}
39 };
40 static const struct iwl_tt_trans tt_range_1[IWL_TI_STATE_MAX - 1] = {
41 {IWL_TI_0, IWL_ABSOLUTE_ZERO, 95},
42 {IWL_TI_2, 110, CT_KILL_THRESHOLD - 1},
43 {IWL_TI_CT_KILL, CT_KILL_THRESHOLD, IWL_ABSOLUTE_MAX}
44 };
45 static const struct iwl_tt_trans tt_range_2[IWL_TI_STATE_MAX - 1] = {
46 {IWL_TI_1, IWL_ABSOLUTE_ZERO, 100},
47 {IWL_TI_CT_KILL, CT_KILL_THRESHOLD, IWL_ABSOLUTE_MAX},
48 {IWL_TI_CT_KILL, CT_KILL_THRESHOLD, IWL_ABSOLUTE_MAX}
49 };
50 static const struct iwl_tt_trans tt_range_3[IWL_TI_STATE_MAX - 1] = {
51 {IWL_TI_0, IWL_ABSOLUTE_ZERO, CT_KILL_EXIT_THRESHOLD},
52 {IWL_TI_CT_KILL, CT_KILL_EXIT_THRESHOLD + 1, IWL_ABSOLUTE_MAX},
53 {IWL_TI_CT_KILL, CT_KILL_EXIT_THRESHOLD + 1, IWL_ABSOLUTE_MAX}
54 };
55
56 /* Advance Thermal Throttling default restriction table */
57 static const struct iwl_tt_restriction restriction_range[IWL_TI_STATE_MAX] = {
58 {IWL_ANT_OK_MULTI, IWL_ANT_OK_MULTI, true },
59 {IWL_ANT_OK_SINGLE, IWL_ANT_OK_MULTI, true },
60 {IWL_ANT_OK_SINGLE, IWL_ANT_OK_SINGLE, false },
61 {IWL_ANT_OK_NONE, IWL_ANT_OK_NONE, false }
62 };
63
iwl_tt_is_low_power_state(struct iwl_priv * priv)64 bool iwl_tt_is_low_power_state(struct iwl_priv *priv)
65 {
66 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
67
68 if (tt->state >= IWL_TI_1)
69 return true;
70 return false;
71 }
72
iwl_tt_current_power_mode(struct iwl_priv * priv)73 u8 iwl_tt_current_power_mode(struct iwl_priv *priv)
74 {
75 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
76
77 return tt->tt_power_mode;
78 }
79
iwl_ht_enabled(struct iwl_priv * priv)80 bool iwl_ht_enabled(struct iwl_priv *priv)
81 {
82 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
83 struct iwl_tt_restriction *restriction;
84
85 if (!priv->thermal_throttle.advanced_tt)
86 return true;
87 restriction = tt->restriction + tt->state;
88 return restriction->is_ht;
89 }
90
iwl_within_ct_kill_margin(struct iwl_priv * priv)91 static bool iwl_within_ct_kill_margin(struct iwl_priv *priv)
92 {
93 s32 temp = priv->temperature; /* degrees CELSIUS except specified */
94 bool within_margin = false;
95
96 if (!priv->thermal_throttle.advanced_tt)
97 within_margin = ((temp + IWL_TT_CT_KILL_MARGIN) >=
98 CT_KILL_THRESHOLD_LEGACY) ? true : false;
99 else
100 within_margin = ((temp + IWL_TT_CT_KILL_MARGIN) >=
101 CT_KILL_THRESHOLD) ? true : false;
102 return within_margin;
103 }
104
iwl_check_for_ct_kill(struct iwl_priv * priv)105 bool iwl_check_for_ct_kill(struct iwl_priv *priv)
106 {
107 bool is_ct_kill = false;
108
109 if (iwl_within_ct_kill_margin(priv)) {
110 iwl_tt_enter_ct_kill(priv);
111 is_ct_kill = true;
112 }
113 return is_ct_kill;
114 }
115
iwl_tx_ant_restriction(struct iwl_priv * priv)116 enum iwl_antenna_ok iwl_tx_ant_restriction(struct iwl_priv *priv)
117 {
118 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
119 struct iwl_tt_restriction *restriction;
120
121 if (!priv->thermal_throttle.advanced_tt)
122 return IWL_ANT_OK_MULTI;
123 restriction = tt->restriction + tt->state;
124 return restriction->tx_stream;
125 }
126
iwl_rx_ant_restriction(struct iwl_priv * priv)127 enum iwl_antenna_ok iwl_rx_ant_restriction(struct iwl_priv *priv)
128 {
129 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
130 struct iwl_tt_restriction *restriction;
131
132 if (!priv->thermal_throttle.advanced_tt)
133 return IWL_ANT_OK_MULTI;
134 restriction = tt->restriction + tt->state;
135 return restriction->rx_stream;
136 }
137
138 #define CT_KILL_EXIT_DURATION (5) /* 5 seconds duration */
139 #define CT_KILL_WAITING_DURATION (300) /* 300ms duration */
140
141 /*
142 * toggle the bit to wake up uCode and check the temperature
143 * if the temperature is below CT, uCode will stay awake and send card
144 * state notification with CT_KILL bit clear to inform Thermal Throttling
145 * Management to change state. Otherwise, uCode will go back to sleep
146 * without doing anything, driver should continue the 5 seconds timer
147 * to wake up uCode for temperature check until temperature drop below CT
148 */
iwl_tt_check_exit_ct_kill(struct timer_list * t)149 static void iwl_tt_check_exit_ct_kill(struct timer_list *t)
150 {
151 struct iwl_priv *priv = from_timer(priv, t,
152 thermal_throttle.ct_kill_exit_tm);
153 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
154
155 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
156 return;
157
158 if (tt->state == IWL_TI_CT_KILL) {
159 if (priv->thermal_throttle.ct_kill_toggle) {
160 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR,
161 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
162 priv->thermal_throttle.ct_kill_toggle = false;
163 } else {
164 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_SET,
165 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
166 priv->thermal_throttle.ct_kill_toggle = true;
167 }
168 iwl_read32(priv->trans, CSR_UCODE_DRV_GP1);
169 if (iwl_trans_grab_nic_access(priv->trans))
170 iwl_trans_release_nic_access(priv->trans);
171
172 /* Reschedule the ct_kill timer to occur in
173 * CT_KILL_EXIT_DURATION seconds to ensure we get a
174 * thermal update */
175 IWL_DEBUG_TEMP(priv, "schedule ct_kill exit timer\n");
176 mod_timer(&priv->thermal_throttle.ct_kill_exit_tm,
177 jiffies + CT_KILL_EXIT_DURATION * HZ);
178 }
179 }
180
iwl_perform_ct_kill_task(struct iwl_priv * priv,bool stop)181 static void iwl_perform_ct_kill_task(struct iwl_priv *priv,
182 bool stop)
183 {
184 if (stop) {
185 IWL_DEBUG_TEMP(priv, "Stop all queues\n");
186 if (priv->mac80211_registered)
187 ieee80211_stop_queues(priv->hw);
188 IWL_DEBUG_TEMP(priv,
189 "Schedule 5 seconds CT_KILL Timer\n");
190 mod_timer(&priv->thermal_throttle.ct_kill_exit_tm,
191 jiffies + CT_KILL_EXIT_DURATION * HZ);
192 } else {
193 IWL_DEBUG_TEMP(priv, "Wake all queues\n");
194 if (priv->mac80211_registered)
195 ieee80211_wake_queues(priv->hw);
196 }
197 }
198
iwl_tt_ready_for_ct_kill(struct timer_list * t)199 static void iwl_tt_ready_for_ct_kill(struct timer_list *t)
200 {
201 struct iwl_priv *priv = from_timer(priv, t,
202 thermal_throttle.ct_kill_waiting_tm);
203 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
204
205 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
206 return;
207
208 /* temperature timer expired, ready to go into CT_KILL state */
209 if (tt->state != IWL_TI_CT_KILL) {
210 IWL_DEBUG_TEMP(priv, "entering CT_KILL state when "
211 "temperature timer expired\n");
212 tt->state = IWL_TI_CT_KILL;
213 set_bit(STATUS_CT_KILL, &priv->status);
214 iwl_perform_ct_kill_task(priv, true);
215 }
216 }
217
iwl_prepare_ct_kill_task(struct iwl_priv * priv)218 static void iwl_prepare_ct_kill_task(struct iwl_priv *priv)
219 {
220 IWL_DEBUG_TEMP(priv, "Prepare to enter IWL_TI_CT_KILL\n");
221 /* make request to retrieve statistics information */
222 iwl_send_statistics_request(priv, 0, false);
223 /* Reschedule the ct_kill wait timer */
224 mod_timer(&priv->thermal_throttle.ct_kill_waiting_tm,
225 jiffies + msecs_to_jiffies(CT_KILL_WAITING_DURATION));
226 }
227
228 #define IWL_MINIMAL_POWER_THRESHOLD (CT_KILL_THRESHOLD_LEGACY)
229 #define IWL_REDUCED_PERFORMANCE_THRESHOLD_2 (100)
230 #define IWL_REDUCED_PERFORMANCE_THRESHOLD_1 (90)
231
232 /*
233 * Legacy thermal throttling
234 * 1) Avoid NIC destruction due to high temperatures
235 * Chip will identify dangerously high temperatures that can
236 * harm the device and will power down
237 * 2) Avoid the NIC power down due to high temperature
238 * Throttle early enough to lower the power consumption before
239 * drastic steps are needed
240 */
iwl_legacy_tt_handler(struct iwl_priv * priv,s32 temp,bool force)241 static void iwl_legacy_tt_handler(struct iwl_priv *priv, s32 temp, bool force)
242 {
243 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
244 enum iwl_tt_state old_state;
245
246 #ifdef CONFIG_IWLWIFI_DEBUG
247 if ((tt->tt_previous_temp) &&
248 (temp > tt->tt_previous_temp) &&
249 ((temp - tt->tt_previous_temp) >
250 IWL_TT_INCREASE_MARGIN)) {
251 IWL_DEBUG_TEMP(priv,
252 "Temperature increase %d degree Celsius\n",
253 (temp - tt->tt_previous_temp));
254 }
255 #endif
256 old_state = tt->state;
257 /* in Celsius */
258 if (temp >= IWL_MINIMAL_POWER_THRESHOLD)
259 tt->state = IWL_TI_CT_KILL;
260 else if (temp >= IWL_REDUCED_PERFORMANCE_THRESHOLD_2)
261 tt->state = IWL_TI_2;
262 else if (temp >= IWL_REDUCED_PERFORMANCE_THRESHOLD_1)
263 tt->state = IWL_TI_1;
264 else
265 tt->state = IWL_TI_0;
266
267 #ifdef CONFIG_IWLWIFI_DEBUG
268 tt->tt_previous_temp = temp;
269 #endif
270 /* stop ct_kill_waiting_tm timer */
271 del_timer_sync(&priv->thermal_throttle.ct_kill_waiting_tm);
272 if (tt->state != old_state) {
273 switch (tt->state) {
274 case IWL_TI_0:
275 /*
276 * When the system is ready to go back to IWL_TI_0
277 * we only have to call iwl_power_update_mode() to
278 * do so.
279 */
280 break;
281 case IWL_TI_1:
282 tt->tt_power_mode = IWL_POWER_INDEX_3;
283 break;
284 case IWL_TI_2:
285 tt->tt_power_mode = IWL_POWER_INDEX_4;
286 break;
287 default:
288 tt->tt_power_mode = IWL_POWER_INDEX_5;
289 break;
290 }
291 mutex_lock(&priv->mutex);
292 if (old_state == IWL_TI_CT_KILL)
293 clear_bit(STATUS_CT_KILL, &priv->status);
294 if (tt->state != IWL_TI_CT_KILL &&
295 iwl_power_update_mode(priv, true)) {
296 /* TT state not updated
297 * try again during next temperature read
298 */
299 if (old_state == IWL_TI_CT_KILL)
300 set_bit(STATUS_CT_KILL, &priv->status);
301 tt->state = old_state;
302 IWL_ERR(priv, "Cannot update power mode, "
303 "TT state not updated\n");
304 } else {
305 if (tt->state == IWL_TI_CT_KILL) {
306 if (force) {
307 set_bit(STATUS_CT_KILL, &priv->status);
308 iwl_perform_ct_kill_task(priv, true);
309 } else {
310 iwl_prepare_ct_kill_task(priv);
311 tt->state = old_state;
312 }
313 } else if (old_state == IWL_TI_CT_KILL) {
314 iwl_perform_ct_kill_task(priv, false);
315 }
316 IWL_DEBUG_TEMP(priv, "Temperature state changed %u\n",
317 tt->state);
318 IWL_DEBUG_TEMP(priv, "Power Index change to %u\n",
319 tt->tt_power_mode);
320 }
321 mutex_unlock(&priv->mutex);
322 }
323 }
324
325 /*
326 * Advance thermal throttling
327 * 1) Avoid NIC destruction due to high temperatures
328 * Chip will identify dangerously high temperatures that can
329 * harm the device and will power down
330 * 2) Avoid the NIC power down due to high temperature
331 * Throttle early enough to lower the power consumption before
332 * drastic steps are needed
333 * Actions include relaxing the power down sleep thresholds and
334 * decreasing the number of TX streams
335 * 3) Avoid throughput performance impact as much as possible
336 *
337 *=============================================================================
338 * Condition Nxt State Condition Nxt State Condition Nxt State
339 *-----------------------------------------------------------------------------
340 * IWL_TI_0 T >= 114 CT_KILL 114>T>=105 TI_1 N/A N/A
341 * IWL_TI_1 T >= 114 CT_KILL 114>T>=110 TI_2 T<=95 TI_0
342 * IWL_TI_2 T >= 114 CT_KILL T<=100 TI_1
343 * IWL_CT_KILL N/A N/A N/A N/A T<=95 TI_0
344 *=============================================================================
345 */
iwl_advance_tt_handler(struct iwl_priv * priv,s32 temp,bool force)346 static void iwl_advance_tt_handler(struct iwl_priv *priv, s32 temp, bool force)
347 {
348 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
349 int i;
350 bool changed = false;
351 enum iwl_tt_state old_state;
352 struct iwl_tt_trans *transaction;
353
354 old_state = tt->state;
355 for (i = 0; i < IWL_TI_STATE_MAX - 1; i++) {
356 /* based on the current TT state,
357 * find the curresponding transaction table
358 * each table has (IWL_TI_STATE_MAX - 1) entries
359 * tt->transaction + ((old_state * (IWL_TI_STATE_MAX - 1))
360 * will advance to the correct table.
361 * then based on the current temperature
362 * find the next state need to transaction to
363 * go through all the possible (IWL_TI_STATE_MAX - 1) entries
364 * in the current table to see if transaction is needed
365 */
366 transaction = tt->transaction +
367 ((old_state * (IWL_TI_STATE_MAX - 1)) + i);
368 if (temp >= transaction->tt_low &&
369 temp <= transaction->tt_high) {
370 #ifdef CONFIG_IWLWIFI_DEBUG
371 if ((tt->tt_previous_temp) &&
372 (temp > tt->tt_previous_temp) &&
373 ((temp - tt->tt_previous_temp) >
374 IWL_TT_INCREASE_MARGIN)) {
375 IWL_DEBUG_TEMP(priv,
376 "Temperature increase %d "
377 "degree Celsius\n",
378 (temp - tt->tt_previous_temp));
379 }
380 tt->tt_previous_temp = temp;
381 #endif
382 if (old_state !=
383 transaction->next_state) {
384 changed = true;
385 tt->state =
386 transaction->next_state;
387 }
388 break;
389 }
390 }
391 /* stop ct_kill_waiting_tm timer */
392 del_timer_sync(&priv->thermal_throttle.ct_kill_waiting_tm);
393 if (changed) {
394 if (tt->state >= IWL_TI_1) {
395 /* force PI = IWL_POWER_INDEX_5 in the case of TI > 0 */
396 tt->tt_power_mode = IWL_POWER_INDEX_5;
397
398 if (!iwl_ht_enabled(priv)) {
399 struct iwl_rxon_context *ctx;
400
401 for_each_context(priv, ctx) {
402 struct iwl_rxon_cmd *rxon;
403
404 rxon = &ctx->staging;
405
406 /* disable HT */
407 rxon->flags &= ~(
408 RXON_FLG_CHANNEL_MODE_MSK |
409 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
410 RXON_FLG_HT40_PROT_MSK |
411 RXON_FLG_HT_PROT_MSK);
412 }
413 } else {
414 /* check HT capability and set
415 * according to the system HT capability
416 * in case get disabled before */
417 iwl_set_rxon_ht(priv, &priv->current_ht_config);
418 }
419
420 } else {
421 /*
422 * restore system power setting -- it will be
423 * recalculated automatically.
424 */
425
426 /* check HT capability and set
427 * according to the system HT capability
428 * in case get disabled before */
429 iwl_set_rxon_ht(priv, &priv->current_ht_config);
430 }
431 mutex_lock(&priv->mutex);
432 if (old_state == IWL_TI_CT_KILL)
433 clear_bit(STATUS_CT_KILL, &priv->status);
434 if (tt->state != IWL_TI_CT_KILL &&
435 iwl_power_update_mode(priv, true)) {
436 /* TT state not updated
437 * try again during next temperature read
438 */
439 IWL_ERR(priv, "Cannot update power mode, "
440 "TT state not updated\n");
441 if (old_state == IWL_TI_CT_KILL)
442 set_bit(STATUS_CT_KILL, &priv->status);
443 tt->state = old_state;
444 } else {
445 IWL_DEBUG_TEMP(priv,
446 "Thermal Throttling to new state: %u\n",
447 tt->state);
448 if (old_state != IWL_TI_CT_KILL &&
449 tt->state == IWL_TI_CT_KILL) {
450 if (force) {
451 IWL_DEBUG_TEMP(priv,
452 "Enter IWL_TI_CT_KILL\n");
453 set_bit(STATUS_CT_KILL, &priv->status);
454 iwl_perform_ct_kill_task(priv, true);
455 } else {
456 tt->state = old_state;
457 iwl_prepare_ct_kill_task(priv);
458 }
459 } else if (old_state == IWL_TI_CT_KILL &&
460 tt->state != IWL_TI_CT_KILL) {
461 IWL_DEBUG_TEMP(priv, "Exit IWL_TI_CT_KILL\n");
462 iwl_perform_ct_kill_task(priv, false);
463 }
464 }
465 mutex_unlock(&priv->mutex);
466 }
467 }
468
469 /* Card State Notification indicated reach critical temperature
470 * if PSP not enable, no Thermal Throttling function will be performed
471 * just set the GP1 bit to acknowledge the event
472 * otherwise, go into IWL_TI_CT_KILL state
473 * since Card State Notification will not provide any temperature reading
474 * for Legacy mode
475 * so just pass the CT_KILL temperature to iwl_legacy_tt_handler()
476 * for advance mode
477 * pass CT_KILL_THRESHOLD+1 to make sure move into IWL_TI_CT_KILL state
478 */
iwl_bg_ct_enter(struct work_struct * work)479 static void iwl_bg_ct_enter(struct work_struct *work)
480 {
481 struct iwl_priv *priv = container_of(work, struct iwl_priv, ct_enter);
482 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
483
484 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
485 return;
486
487 if (!iwl_is_ready(priv))
488 return;
489
490 if (tt->state != IWL_TI_CT_KILL) {
491 IWL_ERR(priv, "Device reached critical temperature "
492 "- ucode going to sleep!\n");
493 if (!priv->thermal_throttle.advanced_tt)
494 iwl_legacy_tt_handler(priv,
495 IWL_MINIMAL_POWER_THRESHOLD,
496 true);
497 else
498 iwl_advance_tt_handler(priv,
499 CT_KILL_THRESHOLD + 1, true);
500 }
501 }
502
503 /* Card State Notification indicated out of critical temperature
504 * since Card State Notification will not provide any temperature reading
505 * so pass the IWL_REDUCED_PERFORMANCE_THRESHOLD_2 temperature
506 * to iwl_legacy_tt_handler() to get out of IWL_CT_KILL state
507 */
iwl_bg_ct_exit(struct work_struct * work)508 static void iwl_bg_ct_exit(struct work_struct *work)
509 {
510 struct iwl_priv *priv = container_of(work, struct iwl_priv, ct_exit);
511 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
512
513 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
514 return;
515
516 if (!iwl_is_ready(priv))
517 return;
518
519 /* stop ct_kill_exit_tm timer */
520 del_timer_sync(&priv->thermal_throttle.ct_kill_exit_tm);
521
522 if (tt->state == IWL_TI_CT_KILL) {
523 IWL_ERR(priv,
524 "Device temperature below critical"
525 "- ucode awake!\n");
526 /*
527 * exit from CT_KILL state
528 * reset the current temperature reading
529 */
530 priv->temperature = 0;
531 if (!priv->thermal_throttle.advanced_tt)
532 iwl_legacy_tt_handler(priv,
533 IWL_REDUCED_PERFORMANCE_THRESHOLD_2,
534 true);
535 else
536 iwl_advance_tt_handler(priv, CT_KILL_EXIT_THRESHOLD,
537 true);
538 }
539 }
540
iwl_tt_enter_ct_kill(struct iwl_priv * priv)541 void iwl_tt_enter_ct_kill(struct iwl_priv *priv)
542 {
543 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
544 return;
545
546 IWL_DEBUG_TEMP(priv, "Queueing critical temperature enter.\n");
547 queue_work(priv->workqueue, &priv->ct_enter);
548 }
549
iwl_tt_exit_ct_kill(struct iwl_priv * priv)550 void iwl_tt_exit_ct_kill(struct iwl_priv *priv)
551 {
552 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
553 return;
554
555 IWL_DEBUG_TEMP(priv, "Queueing critical temperature exit.\n");
556 queue_work(priv->workqueue, &priv->ct_exit);
557 }
558
iwl_bg_tt_work(struct work_struct * work)559 static void iwl_bg_tt_work(struct work_struct *work)
560 {
561 struct iwl_priv *priv = container_of(work, struct iwl_priv, tt_work);
562 s32 temp = priv->temperature; /* degrees CELSIUS except specified */
563
564 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
565 return;
566
567 if (!priv->thermal_throttle.advanced_tt)
568 iwl_legacy_tt_handler(priv, temp, false);
569 else
570 iwl_advance_tt_handler(priv, temp, false);
571 }
572
iwl_tt_handler(struct iwl_priv * priv)573 void iwl_tt_handler(struct iwl_priv *priv)
574 {
575 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
576 return;
577
578 IWL_DEBUG_TEMP(priv, "Queueing thermal throttling work.\n");
579 queue_work(priv->workqueue, &priv->tt_work);
580 }
581
582 /* Thermal throttling initialization
583 * For advance thermal throttling:
584 * Initialize Thermal Index and temperature threshold table
585 * Initialize thermal throttling restriction table
586 */
iwl_tt_initialize(struct iwl_priv * priv)587 void iwl_tt_initialize(struct iwl_priv *priv)
588 {
589 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
590 int size = sizeof(struct iwl_tt_trans) * (IWL_TI_STATE_MAX - 1);
591 struct iwl_tt_trans *transaction;
592
593 IWL_DEBUG_TEMP(priv, "Initialize Thermal Throttling\n");
594
595 memset(tt, 0, sizeof(struct iwl_tt_mgmt));
596
597 tt->state = IWL_TI_0;
598 timer_setup(&priv->thermal_throttle.ct_kill_exit_tm,
599 iwl_tt_check_exit_ct_kill, 0);
600 timer_setup(&priv->thermal_throttle.ct_kill_waiting_tm,
601 iwl_tt_ready_for_ct_kill, 0);
602 /* setup deferred ct kill work */
603 INIT_WORK(&priv->tt_work, iwl_bg_tt_work);
604 INIT_WORK(&priv->ct_enter, iwl_bg_ct_enter);
605 INIT_WORK(&priv->ct_exit, iwl_bg_ct_exit);
606
607 if (priv->lib->adv_thermal_throttle) {
608 IWL_DEBUG_TEMP(priv, "Advanced Thermal Throttling\n");
609 tt->restriction = kcalloc(IWL_TI_STATE_MAX,
610 sizeof(struct iwl_tt_restriction),
611 GFP_KERNEL);
612 tt->transaction = kcalloc(IWL_TI_STATE_MAX *
613 (IWL_TI_STATE_MAX - 1),
614 sizeof(struct iwl_tt_trans),
615 GFP_KERNEL);
616 if (!tt->restriction || !tt->transaction) {
617 IWL_ERR(priv, "Fallback to Legacy Throttling\n");
618 priv->thermal_throttle.advanced_tt = false;
619 kfree(tt->restriction);
620 tt->restriction = NULL;
621 kfree(tt->transaction);
622 tt->transaction = NULL;
623 } else {
624 transaction = tt->transaction +
625 (IWL_TI_0 * (IWL_TI_STATE_MAX - 1));
626 memcpy(transaction, &tt_range_0[0], size);
627 transaction = tt->transaction +
628 (IWL_TI_1 * (IWL_TI_STATE_MAX - 1));
629 memcpy(transaction, &tt_range_1[0], size);
630 transaction = tt->transaction +
631 (IWL_TI_2 * (IWL_TI_STATE_MAX - 1));
632 memcpy(transaction, &tt_range_2[0], size);
633 transaction = tt->transaction +
634 (IWL_TI_CT_KILL * (IWL_TI_STATE_MAX - 1));
635 memcpy(transaction, &tt_range_3[0], size);
636 size = sizeof(struct iwl_tt_restriction) *
637 IWL_TI_STATE_MAX;
638 memcpy(tt->restriction,
639 &restriction_range[0], size);
640 priv->thermal_throttle.advanced_tt = true;
641 }
642 } else {
643 IWL_DEBUG_TEMP(priv, "Legacy Thermal Throttling\n");
644 priv->thermal_throttle.advanced_tt = false;
645 }
646 }
647
648 /* cleanup thermal throttling management related memory and timer */
iwl_tt_exit(struct iwl_priv * priv)649 void iwl_tt_exit(struct iwl_priv *priv)
650 {
651 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
652
653 /* stop ct_kill_exit_tm timer if activated */
654 del_timer_sync(&priv->thermal_throttle.ct_kill_exit_tm);
655 /* stop ct_kill_waiting_tm timer if activated */
656 del_timer_sync(&priv->thermal_throttle.ct_kill_waiting_tm);
657 cancel_work_sync(&priv->tt_work);
658 cancel_work_sync(&priv->ct_enter);
659 cancel_work_sync(&priv->ct_exit);
660
661 if (priv->thermal_throttle.advanced_tt) {
662 /* free advance thermal throttling memory */
663 kfree(tt->restriction);
664 tt->restriction = NULL;
665 kfree(tt->transaction);
666 tt->transaction = NULL;
667 }
668 }
669