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-rw-r--r--drivers/net/wireless/iwlwifi/dvm/tt.c693
1 files changed, 693 insertions, 0 deletions
diff --git a/drivers/net/wireless/iwlwifi/dvm/tt.c b/drivers/net/wireless/iwlwifi/dvm/tt.c
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1/******************************************************************************
2 *
3 * Copyright(c) 2007 - 2012 Intel Corporation. All rights reserved.
4 *
5 * Portions of this file are derived from the ipw3945 project, as well
6 * as portions of the ieee80211 subsystem header files.
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of version 2 of the GNU General Public License as
10 * published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * more details.
16 *
17 * You should have received a copy of the GNU General Public License along with
18 * this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
20 *
21 * The full GNU General Public License is included in this distribution in the
22 * file called LICENSE.
23 *
24 * Contact Information:
25 * Intel Linux Wireless <ilw@linux.intel.com>
26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *****************************************************************************/
28
29
30#include <linux/kernel.h>
31#include <linux/module.h>
32#include <linux/slab.h>
33#include <linux/init.h>
34#include <net/mac80211.h>
35#include "iwl-io.h"
36#include "iwl-modparams.h"
37#include "iwl-debug.h"
38#include "agn.h"
39#include "dev.h"
40#include "commands.h"
41#include "tt.h"
42
43/* default Thermal Throttling transaction table
44 * Current state | Throttling Down | Throttling Up
45 *=============================================================================
46 * Condition Nxt State Condition Nxt State Condition Nxt State
47 *-----------------------------------------------------------------------------
48 * IWL_TI_0 T >= 114 CT_KILL 114>T>=105 TI_1 N/A N/A
49 * IWL_TI_1 T >= 114 CT_KILL 114>T>=110 TI_2 T<=95 TI_0
50 * IWL_TI_2 T >= 114 CT_KILL T<=100 TI_1
51 * IWL_CT_KILL N/A N/A N/A N/A T<=95 TI_0
52 *=============================================================================
53 */
54static const struct iwl_tt_trans tt_range_0[IWL_TI_STATE_MAX - 1] = {
55 {IWL_TI_0, IWL_ABSOLUTE_ZERO, 104},
56 {IWL_TI_1, 105, CT_KILL_THRESHOLD - 1},
57 {IWL_TI_CT_KILL, CT_KILL_THRESHOLD, IWL_ABSOLUTE_MAX}
58};
59static const struct iwl_tt_trans tt_range_1[IWL_TI_STATE_MAX - 1] = {
60 {IWL_TI_0, IWL_ABSOLUTE_ZERO, 95},
61 {IWL_TI_2, 110, CT_KILL_THRESHOLD - 1},
62 {IWL_TI_CT_KILL, CT_KILL_THRESHOLD, IWL_ABSOLUTE_MAX}
63};
64static const struct iwl_tt_trans tt_range_2[IWL_TI_STATE_MAX - 1] = {
65 {IWL_TI_1, IWL_ABSOLUTE_ZERO, 100},
66 {IWL_TI_CT_KILL, CT_KILL_THRESHOLD, IWL_ABSOLUTE_MAX},
67 {IWL_TI_CT_KILL, CT_KILL_THRESHOLD, IWL_ABSOLUTE_MAX}
68};
69static const struct iwl_tt_trans tt_range_3[IWL_TI_STATE_MAX - 1] = {
70 {IWL_TI_0, IWL_ABSOLUTE_ZERO, CT_KILL_EXIT_THRESHOLD},
71 {IWL_TI_CT_KILL, CT_KILL_EXIT_THRESHOLD + 1, IWL_ABSOLUTE_MAX},
72 {IWL_TI_CT_KILL, CT_KILL_EXIT_THRESHOLD + 1, IWL_ABSOLUTE_MAX}
73};
74
75/* Advance Thermal Throttling default restriction table */
76static const struct iwl_tt_restriction restriction_range[IWL_TI_STATE_MAX] = {
77 {IWL_ANT_OK_MULTI, IWL_ANT_OK_MULTI, true },
78 {IWL_ANT_OK_SINGLE, IWL_ANT_OK_MULTI, true },
79 {IWL_ANT_OK_SINGLE, IWL_ANT_OK_SINGLE, false },
80 {IWL_ANT_OK_NONE, IWL_ANT_OK_NONE, false }
81};
82
83bool iwl_tt_is_low_power_state(struct iwl_priv *priv)
84{
85 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
86
87 if (tt->state >= IWL_TI_1)
88 return true;
89 return false;
90}
91
92u8 iwl_tt_current_power_mode(struct iwl_priv *priv)
93{
94 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
95
96 return tt->tt_power_mode;
97}
98
99bool iwl_ht_enabled(struct iwl_priv *priv)
100{
101 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
102 struct iwl_tt_restriction *restriction;
103
104 if (!priv->thermal_throttle.advanced_tt)
105 return true;
106 restriction = tt->restriction + tt->state;
107 return restriction->is_ht;
108}
109
110static bool iwl_within_ct_kill_margin(struct iwl_priv *priv)
111{
112 s32 temp = priv->temperature; /* degrees CELSIUS except specified */
113 bool within_margin = false;
114
115 if (!priv->thermal_throttle.advanced_tt)
116 within_margin = ((temp + IWL_TT_CT_KILL_MARGIN) >=
117 CT_KILL_THRESHOLD_LEGACY) ? true : false;
118 else
119 within_margin = ((temp + IWL_TT_CT_KILL_MARGIN) >=
120 CT_KILL_THRESHOLD) ? true : false;
121 return within_margin;
122}
123
124bool iwl_check_for_ct_kill(struct iwl_priv *priv)
125{
126 bool is_ct_kill = false;
127
128 if (iwl_within_ct_kill_margin(priv)) {
129 iwl_tt_enter_ct_kill(priv);
130 is_ct_kill = true;
131 }
132 return is_ct_kill;
133}
134
135enum iwl_antenna_ok iwl_tx_ant_restriction(struct iwl_priv *priv)
136{
137 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
138 struct iwl_tt_restriction *restriction;
139
140 if (!priv->thermal_throttle.advanced_tt)
141 return IWL_ANT_OK_MULTI;
142 restriction = tt->restriction + tt->state;
143 return restriction->tx_stream;
144}
145
146enum iwl_antenna_ok iwl_rx_ant_restriction(struct iwl_priv *priv)
147{
148 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
149 struct iwl_tt_restriction *restriction;
150
151 if (!priv->thermal_throttle.advanced_tt)
152 return IWL_ANT_OK_MULTI;
153 restriction = tt->restriction + tt->state;
154 return restriction->rx_stream;
155}
156
157#define CT_KILL_EXIT_DURATION (5) /* 5 seconds duration */
158#define CT_KILL_WAITING_DURATION (300) /* 300ms duration */
159
160/*
161 * toggle the bit to wake up uCode and check the temperature
162 * if the temperature is below CT, uCode will stay awake and send card
163 * state notification with CT_KILL bit clear to inform Thermal Throttling
164 * Management to change state. Otherwise, uCode will go back to sleep
165 * without doing anything, driver should continue the 5 seconds timer
166 * to wake up uCode for temperature check until temperature drop below CT
167 */
168static void iwl_tt_check_exit_ct_kill(unsigned long data)
169{
170 struct iwl_priv *priv = (struct iwl_priv *)data;
171 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
172 unsigned long flags;
173
174 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
175 return;
176
177 if (tt->state == IWL_TI_CT_KILL) {
178 if (priv->thermal_throttle.ct_kill_toggle) {
179 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR,
180 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
181 priv->thermal_throttle.ct_kill_toggle = false;
182 } else {
183 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_SET,
184 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
185 priv->thermal_throttle.ct_kill_toggle = true;
186 }
187 iwl_read32(priv->trans, CSR_UCODE_DRV_GP1);
188 spin_lock_irqsave(&priv->trans->reg_lock, flags);
189 if (likely(iwl_grab_nic_access(priv->trans)))
190 iwl_release_nic_access(priv->trans);
191 spin_unlock_irqrestore(&priv->trans->reg_lock, flags);
192
193 /* Reschedule the ct_kill timer to occur in
194 * CT_KILL_EXIT_DURATION seconds to ensure we get a
195 * thermal update */
196 IWL_DEBUG_TEMP(priv, "schedule ct_kill exit timer\n");
197 mod_timer(&priv->thermal_throttle.ct_kill_exit_tm,
198 jiffies + CT_KILL_EXIT_DURATION * HZ);
199 }
200}
201
202static void iwl_perform_ct_kill_task(struct iwl_priv *priv,
203 bool stop)
204{
205 if (stop) {
206 IWL_DEBUG_TEMP(priv, "Stop all queues\n");
207 if (priv->mac80211_registered)
208 ieee80211_stop_queues(priv->hw);
209 IWL_DEBUG_TEMP(priv,
210 "Schedule 5 seconds CT_KILL Timer\n");
211 mod_timer(&priv->thermal_throttle.ct_kill_exit_tm,
212 jiffies + CT_KILL_EXIT_DURATION * HZ);
213 } else {
214 IWL_DEBUG_TEMP(priv, "Wake all queues\n");
215 if (priv->mac80211_registered)
216 ieee80211_wake_queues(priv->hw);
217 }
218}
219
220static void iwl_tt_ready_for_ct_kill(unsigned long data)
221{
222 struct iwl_priv *priv = (struct iwl_priv *)data;
223 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
224
225 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
226 return;
227
228 /* temperature timer expired, ready to go into CT_KILL state */
229 if (tt->state != IWL_TI_CT_KILL) {
230 IWL_DEBUG_TEMP(priv, "entering CT_KILL state when "
231 "temperature timer expired\n");
232 tt->state = IWL_TI_CT_KILL;
233 set_bit(STATUS_CT_KILL, &priv->status);
234 iwl_perform_ct_kill_task(priv, true);
235 }
236}
237
238static void iwl_prepare_ct_kill_task(struct iwl_priv *priv)
239{
240 IWL_DEBUG_TEMP(priv, "Prepare to enter IWL_TI_CT_KILL\n");
241 /* make request to retrieve statistics information */
242 iwl_send_statistics_request(priv, CMD_SYNC, false);
243 /* Reschedule the ct_kill wait timer */
244 mod_timer(&priv->thermal_throttle.ct_kill_waiting_tm,
245 jiffies + msecs_to_jiffies(CT_KILL_WAITING_DURATION));
246}
247
248#define IWL_MINIMAL_POWER_THRESHOLD (CT_KILL_THRESHOLD_LEGACY)
249#define IWL_REDUCED_PERFORMANCE_THRESHOLD_2 (100)
250#define IWL_REDUCED_PERFORMANCE_THRESHOLD_1 (90)
251
252/*
253 * Legacy thermal throttling
254 * 1) Avoid NIC destruction due to high temperatures
255 * Chip will identify dangerously high temperatures that can
256 * harm the device and will power down
257 * 2) Avoid the NIC power down due to high temperature
258 * Throttle early enough to lower the power consumption before
259 * drastic steps are needed
260 */
261static void iwl_legacy_tt_handler(struct iwl_priv *priv, s32 temp, bool force)
262{
263 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
264 enum iwl_tt_state old_state;
265
266#ifdef CONFIG_IWLWIFI_DEBUG
267 if ((tt->tt_previous_temp) &&
268 (temp > tt->tt_previous_temp) &&
269 ((temp - tt->tt_previous_temp) >
270 IWL_TT_INCREASE_MARGIN)) {
271 IWL_DEBUG_TEMP(priv,
272 "Temperature increase %d degree Celsius\n",
273 (temp - tt->tt_previous_temp));
274 }
275#endif
276 old_state = tt->state;
277 /* in Celsius */
278 if (temp >= IWL_MINIMAL_POWER_THRESHOLD)
279 tt->state = IWL_TI_CT_KILL;
280 else if (temp >= IWL_REDUCED_PERFORMANCE_THRESHOLD_2)
281 tt->state = IWL_TI_2;
282 else if (temp >= IWL_REDUCED_PERFORMANCE_THRESHOLD_1)
283 tt->state = IWL_TI_1;
284 else
285 tt->state = IWL_TI_0;
286
287#ifdef CONFIG_IWLWIFI_DEBUG
288 tt->tt_previous_temp = temp;
289#endif
290 /* stop ct_kill_waiting_tm timer */
291 del_timer_sync(&priv->thermal_throttle.ct_kill_waiting_tm);
292 if (tt->state != old_state) {
293 switch (tt->state) {
294 case IWL_TI_0:
295 /*
296 * When the system is ready to go back to IWL_TI_0
297 * we only have to call iwl_power_update_mode() to
298 * do so.
299 */
300 break;
301 case IWL_TI_1:
302 tt->tt_power_mode = IWL_POWER_INDEX_3;
303 break;
304 case IWL_TI_2:
305 tt->tt_power_mode = IWL_POWER_INDEX_4;
306 break;
307 default:
308 tt->tt_power_mode = IWL_POWER_INDEX_5;
309 break;
310 }
311 mutex_lock(&priv->mutex);
312 if (old_state == IWL_TI_CT_KILL)
313 clear_bit(STATUS_CT_KILL, &priv->status);
314 if (tt->state != IWL_TI_CT_KILL &&
315 iwl_power_update_mode(priv, true)) {
316 /* TT state not updated
317 * try again during next temperature read
318 */
319 if (old_state == IWL_TI_CT_KILL)
320 set_bit(STATUS_CT_KILL, &priv->status);
321 tt->state = old_state;
322 IWL_ERR(priv, "Cannot update power mode, "
323 "TT state not updated\n");
324 } else {
325 if (tt->state == IWL_TI_CT_KILL) {
326 if (force) {
327 set_bit(STATUS_CT_KILL, &priv->status);
328 iwl_perform_ct_kill_task(priv, true);
329 } else {
330 iwl_prepare_ct_kill_task(priv);
331 tt->state = old_state;
332 }
333 } else if (old_state == IWL_TI_CT_KILL &&
334 tt->state != IWL_TI_CT_KILL)
335 iwl_perform_ct_kill_task(priv, false);
336 IWL_DEBUG_TEMP(priv, "Temperature state changed %u\n",
337 tt->state);
338 IWL_DEBUG_TEMP(priv, "Power Index change to %u\n",
339 tt->tt_power_mode);
340 }
341 mutex_unlock(&priv->mutex);
342 }
343}
344
345/*
346 * Advance thermal throttling
347 * 1) Avoid NIC destruction due to high temperatures
348 * Chip will identify dangerously high temperatures that can
349 * harm the device and will power down
350 * 2) Avoid the NIC power down due to high temperature
351 * Throttle early enough to lower the power consumption before
352 * drastic steps are needed
353 * Actions include relaxing the power down sleep thresholds and
354 * decreasing the number of TX streams
355 * 3) Avoid throughput performance impact as much as possible
356 *
357 *=============================================================================
358 * Condition Nxt State Condition Nxt State Condition Nxt State
359 *-----------------------------------------------------------------------------
360 * IWL_TI_0 T >= 114 CT_KILL 114>T>=105 TI_1 N/A N/A
361 * IWL_TI_1 T >= 114 CT_KILL 114>T>=110 TI_2 T<=95 TI_0
362 * IWL_TI_2 T >= 114 CT_KILL T<=100 TI_1
363 * IWL_CT_KILL N/A N/A N/A N/A T<=95 TI_0
364 *=============================================================================
365 */
366static void iwl_advance_tt_handler(struct iwl_priv *priv, s32 temp, bool force)
367{
368 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
369 int i;
370 bool changed = false;
371 enum iwl_tt_state old_state;
372 struct iwl_tt_trans *transaction;
373
374 old_state = tt->state;
375 for (i = 0; i < IWL_TI_STATE_MAX - 1; i++) {
376 /* based on the current TT state,
377 * find the curresponding transaction table
378 * each table has (IWL_TI_STATE_MAX - 1) entries
379 * tt->transaction + ((old_state * (IWL_TI_STATE_MAX - 1))
380 * will advance to the correct table.
381 * then based on the current temperature
382 * find the next state need to transaction to
383 * go through all the possible (IWL_TI_STATE_MAX - 1) entries
384 * in the current table to see if transaction is needed
385 */
386 transaction = tt->transaction +
387 ((old_state * (IWL_TI_STATE_MAX - 1)) + i);
388 if (temp >= transaction->tt_low &&
389 temp <= transaction->tt_high) {
390#ifdef CONFIG_IWLWIFI_DEBUG
391 if ((tt->tt_previous_temp) &&
392 (temp > tt->tt_previous_temp) &&
393 ((temp - tt->tt_previous_temp) >
394 IWL_TT_INCREASE_MARGIN)) {
395 IWL_DEBUG_TEMP(priv,
396 "Temperature increase %d "
397 "degree Celsius\n",
398 (temp - tt->tt_previous_temp));
399 }
400 tt->tt_previous_temp = temp;
401#endif
402 if (old_state !=
403 transaction->next_state) {
404 changed = true;
405 tt->state =
406 transaction->next_state;
407 }
408 break;
409 }
410 }
411 /* stop ct_kill_waiting_tm timer */
412 del_timer_sync(&priv->thermal_throttle.ct_kill_waiting_tm);
413 if (changed) {
414 if (tt->state >= IWL_TI_1) {
415 /* force PI = IWL_POWER_INDEX_5 in the case of TI > 0 */
416 tt->tt_power_mode = IWL_POWER_INDEX_5;
417
418 if (!iwl_ht_enabled(priv)) {
419 struct iwl_rxon_context *ctx;
420
421 for_each_context(priv, ctx) {
422 struct iwl_rxon_cmd *rxon;
423
424 rxon = &ctx->staging;
425
426 /* disable HT */
427 rxon->flags &= ~(
428 RXON_FLG_CHANNEL_MODE_MSK |
429 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
430 RXON_FLG_HT40_PROT_MSK |
431 RXON_FLG_HT_PROT_MSK);
432 }
433 } else {
434 /* check HT capability and set
435 * according to the system HT capability
436 * in case get disabled before */
437 iwl_set_rxon_ht(priv, &priv->current_ht_config);
438 }
439
440 } else {
441 /*
442 * restore system power setting -- it will be
443 * recalculated automatically.
444 */
445
446 /* check HT capability and set
447 * according to the system HT capability
448 * in case get disabled before */
449 iwl_set_rxon_ht(priv, &priv->current_ht_config);
450 }
451 mutex_lock(&priv->mutex);
452 if (old_state == IWL_TI_CT_KILL)
453 clear_bit(STATUS_CT_KILL, &priv->status);
454 if (tt->state != IWL_TI_CT_KILL &&
455 iwl_power_update_mode(priv, true)) {
456 /* TT state not updated
457 * try again during next temperature read
458 */
459 IWL_ERR(priv, "Cannot update power mode, "
460 "TT state not updated\n");
461 if (old_state == IWL_TI_CT_KILL)
462 set_bit(STATUS_CT_KILL, &priv->status);
463 tt->state = old_state;
464 } else {
465 IWL_DEBUG_TEMP(priv,
466 "Thermal Throttling to new state: %u\n",
467 tt->state);
468 if (old_state != IWL_TI_CT_KILL &&
469 tt->state == IWL_TI_CT_KILL) {
470 if (force) {
471 IWL_DEBUG_TEMP(priv,
472 "Enter IWL_TI_CT_KILL\n");
473 set_bit(STATUS_CT_KILL, &priv->status);
474 iwl_perform_ct_kill_task(priv, true);
475 } else {
476 iwl_prepare_ct_kill_task(priv);
477 tt->state = old_state;
478 }
479 } else if (old_state == IWL_TI_CT_KILL &&
480 tt->state != IWL_TI_CT_KILL) {
481 IWL_DEBUG_TEMP(priv, "Exit IWL_TI_CT_KILL\n");
482 iwl_perform_ct_kill_task(priv, false);
483 }
484 }
485 mutex_unlock(&priv->mutex);
486 }
487}
488
489/* Card State Notification indicated reach critical temperature
490 * if PSP not enable, no Thermal Throttling function will be performed
491 * just set the GP1 bit to acknowledge the event
492 * otherwise, go into IWL_TI_CT_KILL state
493 * since Card State Notification will not provide any temperature reading
494 * for Legacy mode
495 * so just pass the CT_KILL temperature to iwl_legacy_tt_handler()
496 * for advance mode
497 * pass CT_KILL_THRESHOLD+1 to make sure move into IWL_TI_CT_KILL state
498 */
499static void iwl_bg_ct_enter(struct work_struct *work)
500{
501 struct iwl_priv *priv = container_of(work, struct iwl_priv, ct_enter);
502 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
503
504 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
505 return;
506
507 if (!iwl_is_ready(priv))
508 return;
509
510 if (tt->state != IWL_TI_CT_KILL) {
511 IWL_ERR(priv, "Device reached critical temperature "
512 "- ucode going to sleep!\n");
513 if (!priv->thermal_throttle.advanced_tt)
514 iwl_legacy_tt_handler(priv,
515 IWL_MINIMAL_POWER_THRESHOLD,
516 true);
517 else
518 iwl_advance_tt_handler(priv,
519 CT_KILL_THRESHOLD + 1, true);
520 }
521}
522
523/* Card State Notification indicated out of critical temperature
524 * since Card State Notification will not provide any temperature reading
525 * so pass the IWL_REDUCED_PERFORMANCE_THRESHOLD_2 temperature
526 * to iwl_legacy_tt_handler() to get out of IWL_CT_KILL state
527 */
528static void iwl_bg_ct_exit(struct work_struct *work)
529{
530 struct iwl_priv *priv = container_of(work, struct iwl_priv, ct_exit);
531 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
532
533 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
534 return;
535
536 if (!iwl_is_ready(priv))
537 return;
538
539 /* stop ct_kill_exit_tm timer */
540 del_timer_sync(&priv->thermal_throttle.ct_kill_exit_tm);
541
542 if (tt->state == IWL_TI_CT_KILL) {
543 IWL_ERR(priv,
544 "Device temperature below critical"
545 "- ucode awake!\n");
546 /*
547 * exit from CT_KILL state
548 * reset the current temperature reading
549 */
550 priv->temperature = 0;
551 if (!priv->thermal_throttle.advanced_tt)
552 iwl_legacy_tt_handler(priv,
553 IWL_REDUCED_PERFORMANCE_THRESHOLD_2,
554 true);
555 else
556 iwl_advance_tt_handler(priv, CT_KILL_EXIT_THRESHOLD,
557 true);
558 }
559}
560
561void iwl_tt_enter_ct_kill(struct iwl_priv *priv)
562{
563 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
564 return;
565
566 IWL_DEBUG_TEMP(priv, "Queueing critical temperature enter.\n");
567 queue_work(priv->workqueue, &priv->ct_enter);
568}
569
570void iwl_tt_exit_ct_kill(struct iwl_priv *priv)
571{
572 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
573 return;
574
575 IWL_DEBUG_TEMP(priv, "Queueing critical temperature exit.\n");
576 queue_work(priv->workqueue, &priv->ct_exit);
577}
578
579static void iwl_bg_tt_work(struct work_struct *work)
580{
581 struct iwl_priv *priv = container_of(work, struct iwl_priv, tt_work);
582 s32 temp = priv->temperature; /* degrees CELSIUS except specified */
583
584 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
585 return;
586
587 if (!priv->thermal_throttle.advanced_tt)
588 iwl_legacy_tt_handler(priv, temp, false);
589 else
590 iwl_advance_tt_handler(priv, temp, false);
591}
592
593void iwl_tt_handler(struct iwl_priv *priv)
594{
595 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
596 return;
597
598 IWL_DEBUG_TEMP(priv, "Queueing thermal throttling work.\n");
599 queue_work(priv->workqueue, &priv->tt_work);
600}
601
602/* Thermal throttling initialization
603 * For advance thermal throttling:
604 * Initialize Thermal Index and temperature threshold table
605 * Initialize thermal throttling restriction table
606 */
607void iwl_tt_initialize(struct iwl_priv *priv)
608{
609 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
610 int size = sizeof(struct iwl_tt_trans) * (IWL_TI_STATE_MAX - 1);
611 struct iwl_tt_trans *transaction;
612
613 IWL_DEBUG_TEMP(priv, "Initialize Thermal Throttling\n");
614
615 memset(tt, 0, sizeof(struct iwl_tt_mgmt));
616
617 tt->state = IWL_TI_0;
618 init_timer(&priv->thermal_throttle.ct_kill_exit_tm);
619 priv->thermal_throttle.ct_kill_exit_tm.data = (unsigned long)priv;
620 priv->thermal_throttle.ct_kill_exit_tm.function =
621 iwl_tt_check_exit_ct_kill;
622 init_timer(&priv->thermal_throttle.ct_kill_waiting_tm);
623 priv->thermal_throttle.ct_kill_waiting_tm.data =
624 (unsigned long)priv;
625 priv->thermal_throttle.ct_kill_waiting_tm.function =
626 iwl_tt_ready_for_ct_kill;
627 /* setup deferred ct kill work */
628 INIT_WORK(&priv->tt_work, iwl_bg_tt_work);
629 INIT_WORK(&priv->ct_enter, iwl_bg_ct_enter);
630 INIT_WORK(&priv->ct_exit, iwl_bg_ct_exit);
631
632 if (priv->cfg->base_params->adv_thermal_throttle) {
633 IWL_DEBUG_TEMP(priv, "Advanced Thermal Throttling\n");
634 tt->restriction = kcalloc(IWL_TI_STATE_MAX,
635 sizeof(struct iwl_tt_restriction),
636 GFP_KERNEL);
637 tt->transaction = kcalloc(IWL_TI_STATE_MAX *
638 (IWL_TI_STATE_MAX - 1),
639 sizeof(struct iwl_tt_trans),
640 GFP_KERNEL);
641 if (!tt->restriction || !tt->transaction) {
642 IWL_ERR(priv, "Fallback to Legacy Throttling\n");
643 priv->thermal_throttle.advanced_tt = false;
644 kfree(tt->restriction);
645 tt->restriction = NULL;
646 kfree(tt->transaction);
647 tt->transaction = NULL;
648 } else {
649 transaction = tt->transaction +
650 (IWL_TI_0 * (IWL_TI_STATE_MAX - 1));
651 memcpy(transaction, &tt_range_0[0], size);
652 transaction = tt->transaction +
653 (IWL_TI_1 * (IWL_TI_STATE_MAX - 1));
654 memcpy(transaction, &tt_range_1[0], size);
655 transaction = tt->transaction +
656 (IWL_TI_2 * (IWL_TI_STATE_MAX - 1));
657 memcpy(transaction, &tt_range_2[0], size);
658 transaction = tt->transaction +
659 (IWL_TI_CT_KILL * (IWL_TI_STATE_MAX - 1));
660 memcpy(transaction, &tt_range_3[0], size);
661 size = sizeof(struct iwl_tt_restriction) *
662 IWL_TI_STATE_MAX;
663 memcpy(tt->restriction,
664 &restriction_range[0], size);
665 priv->thermal_throttle.advanced_tt = true;
666 }
667 } else {
668 IWL_DEBUG_TEMP(priv, "Legacy Thermal Throttling\n");
669 priv->thermal_throttle.advanced_tt = false;
670 }
671}
672
673/* cleanup thermal throttling management related memory and timer */
674void iwl_tt_exit(struct iwl_priv *priv)
675{
676 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
677
678 /* stop ct_kill_exit_tm timer if activated */
679 del_timer_sync(&priv->thermal_throttle.ct_kill_exit_tm);
680 /* stop ct_kill_waiting_tm timer if activated */
681 del_timer_sync(&priv->thermal_throttle.ct_kill_waiting_tm);
682 cancel_work_sync(&priv->tt_work);
683 cancel_work_sync(&priv->ct_enter);
684 cancel_work_sync(&priv->ct_exit);
685
686 if (priv->thermal_throttle.advanced_tt) {
687 /* free advance thermal throttling memory */
688 kfree(tt->restriction);
689 tt->restriction = NULL;
690 kfree(tt->transaction);
691 tt->transaction = NULL;
692 }
693}
generated by cgit v1.2.2 (git 2.25.0) at 2025-02-06 13:24:38 -0500