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ARM: mm: Recreate kernel mappings in early_paging_init()
[linux/fpc-iii.git] / drivers / net / wireless / iwlwifi / dvm / tt.c
blobfbeee081ee2fccde51f0a227f6d9053f472722af
1 /******************************************************************************
2 *
3 * Copyright(c) 2007 - 2013 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 */
54 static 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 };
59 static 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 };
64 static 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 };
69 static 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 */
76 static 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
83 bool 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
92 u8 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
99 bool 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
110 static 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
124 bool 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
135 enum 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
146 enum 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 */
168 static 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 if (iwl_trans_grab_nic_access(priv->trans, false, &flags))
189 iwl_trans_release_nic_access(priv->trans, &flags);
190
191 /* Reschedule the ct_kill timer to occur in
192 * CT_KILL_EXIT_DURATION seconds to ensure we get a
193 * thermal update */
194 IWL_DEBUG_TEMP(priv, "schedule ct_kill exit timer\n");
195 mod_timer(&priv->thermal_throttle.ct_kill_exit_tm,
196 jiffies + CT_KILL_EXIT_DURATION * HZ);
197 }
198 }
199
200 static void iwl_perform_ct_kill_task(struct iwl_priv *priv,
201 bool stop)
202 {
203 if (stop) {
204 IWL_DEBUG_TEMP(priv, "Stop all queues\n");
205 if (priv->mac80211_registered)
206 ieee80211_stop_queues(priv->hw);
207 IWL_DEBUG_TEMP(priv,
208 "Schedule 5 seconds CT_KILL Timer\n");
209 mod_timer(&priv->thermal_throttle.ct_kill_exit_tm,
210 jiffies + CT_KILL_EXIT_DURATION * HZ);
211 } else {
212 IWL_DEBUG_TEMP(priv, "Wake all queues\n");
213 if (priv->mac80211_registered)
214 ieee80211_wake_queues(priv->hw);
215 }
216 }
217
218 static void iwl_tt_ready_for_ct_kill(unsigned long data)
219 {
220 struct iwl_priv *priv = (struct iwl_priv *)data;
221 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
222
223 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
224 return;
225
226 /* temperature timer expired, ready to go into CT_KILL state */
227 if (tt->state != IWL_TI_CT_KILL) {
228 IWL_DEBUG_TEMP(priv, "entering CT_KILL state when "
229 "temperature timer expired\n");
230 tt->state = IWL_TI_CT_KILL;
231 set_bit(STATUS_CT_KILL, &priv->status);
232 iwl_perform_ct_kill_task(priv, true);
233 }
234 }
235
236 static void iwl_prepare_ct_kill_task(struct iwl_priv *priv)
237 {
238 IWL_DEBUG_TEMP(priv, "Prepare to enter IWL_TI_CT_KILL\n");
239 /* make request to retrieve statistics information */
240 iwl_send_statistics_request(priv, CMD_SYNC, false);
241 /* Reschedule the ct_kill wait timer */
242 mod_timer(&priv->thermal_throttle.ct_kill_waiting_tm,
243 jiffies + msecs_to_jiffies(CT_KILL_WAITING_DURATION));
244 }
245
246 #define IWL_MINIMAL_POWER_THRESHOLD (CT_KILL_THRESHOLD_LEGACY)
247 #define IWL_REDUCED_PERFORMANCE_THRESHOLD_2 (100)
248 #define IWL_REDUCED_PERFORMANCE_THRESHOLD_1 (90)
249
250 /*
251 * Legacy thermal throttling
252 * 1) Avoid NIC destruction due to high temperatures
253 * Chip will identify dangerously high temperatures that can
254 * harm the device and will power down
255 * 2) Avoid the NIC power down due to high temperature
256 * Throttle early enough to lower the power consumption before
257 * drastic steps are needed
258 */
259 static void iwl_legacy_tt_handler(struct iwl_priv *priv, s32 temp, bool force)
260 {
261 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
262 enum iwl_tt_state old_state;
263
264 #ifdef CONFIG_IWLWIFI_DEBUG
265 if ((tt->tt_previous_temp) &&
266 (temp > tt->tt_previous_temp) &&
267 ((temp - tt->tt_previous_temp) >
268 IWL_TT_INCREASE_MARGIN)) {
269 IWL_DEBUG_TEMP(priv,
270 "Temperature increase %d degree Celsius\n",
271 (temp - tt->tt_previous_temp));
272 }
273 #endif
274 old_state = tt->state;
275 /* in Celsius */
276 if (temp >= IWL_MINIMAL_POWER_THRESHOLD)
277 tt->state = IWL_TI_CT_KILL;
278 else if (temp >= IWL_REDUCED_PERFORMANCE_THRESHOLD_2)
279 tt->state = IWL_TI_2;
280 else if (temp >= IWL_REDUCED_PERFORMANCE_THRESHOLD_1)
281 tt->state = IWL_TI_1;
282 else
283 tt->state = IWL_TI_0;
284
285 #ifdef CONFIG_IWLWIFI_DEBUG
286 tt->tt_previous_temp = temp;
287 #endif
288 /* stop ct_kill_waiting_tm timer */
289 del_timer_sync(&priv->thermal_throttle.ct_kill_waiting_tm);
290 if (tt->state != old_state) {
291 switch (tt->state) {
292 case IWL_TI_0:
293 /*
294 * When the system is ready to go back to IWL_TI_0
295 * we only have to call iwl_power_update_mode() to
296 * do so.
297 */
298 break;
299 case IWL_TI_1:
300 tt->tt_power_mode = IWL_POWER_INDEX_3;
301 break;
302 case IWL_TI_2:
303 tt->tt_power_mode = IWL_POWER_INDEX_4;
304 break;
305 default:
306 tt->tt_power_mode = IWL_POWER_INDEX_5;
307 break;
308 }
309 mutex_lock(&priv->mutex);
310 if (old_state == IWL_TI_CT_KILL)
311 clear_bit(STATUS_CT_KILL, &priv->status);
312 if (tt->state != IWL_TI_CT_KILL &&
313 iwl_power_update_mode(priv, true)) {
314 /* TT state not updated
315 * try again during next temperature read
316 */
317 if (old_state == IWL_TI_CT_KILL)
318 set_bit(STATUS_CT_KILL, &priv->status);
319 tt->state = old_state;
320 IWL_ERR(priv, "Cannot update power mode, "
321 "TT state not updated\n");
322 } else {
323 if (tt->state == IWL_TI_CT_KILL) {
324 if (force) {
325 set_bit(STATUS_CT_KILL, &priv->status);
326 iwl_perform_ct_kill_task(priv, true);
327 } else {
328 iwl_prepare_ct_kill_task(priv);
329 tt->state = old_state;
330 }
331 } else if (old_state == IWL_TI_CT_KILL &&
332 tt->state != IWL_TI_CT_KILL)
333 iwl_perform_ct_kill_task(priv, false);
334 IWL_DEBUG_TEMP(priv, "Temperature state changed %u\n",
335 tt->state);
336 IWL_DEBUG_TEMP(priv, "Power Index change to %u\n",
337 tt->tt_power_mode);
338 }
339 mutex_unlock(&priv->mutex);
340 }
341 }
342
343 /*
344 * Advance thermal throttling
345 * 1) Avoid NIC destruction due to high temperatures
346 * Chip will identify dangerously high temperatures that can
347 * harm the device and will power down
348 * 2) Avoid the NIC power down due to high temperature
349 * Throttle early enough to lower the power consumption before
350 * drastic steps are needed
351 * Actions include relaxing the power down sleep thresholds and
352 * decreasing the number of TX streams
353 * 3) Avoid throughput performance impact as much as possible
354 *
355 *=============================================================================
356 * Condition Nxt State Condition Nxt State Condition Nxt State
357 *-----------------------------------------------------------------------------
358 * IWL_TI_0 T >= 114 CT_KILL 114>T>=105 TI_1 N/A N/A
359 * IWL_TI_1 T >= 114 CT_KILL 114>T>=110 TI_2 T<=95 TI_0
360 * IWL_TI_2 T >= 114 CT_KILL T<=100 TI_1
361 * IWL_CT_KILL N/A N/A N/A N/A T<=95 TI_0
362 *=============================================================================
363 */
364 static void iwl_advance_tt_handler(struct iwl_priv *priv, s32 temp, bool force)
365 {
366 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
367 int i;
368 bool changed = false;
369 enum iwl_tt_state old_state;
370 struct iwl_tt_trans *transaction;
371
372 old_state = tt->state;
373 for (i = 0; i < IWL_TI_STATE_MAX - 1; i++) {
374 /* based on the current TT state,
375 * find the curresponding transaction table
376 * each table has (IWL_TI_STATE_MAX - 1) entries
377 * tt->transaction + ((old_state * (IWL_TI_STATE_MAX - 1))
378 * will advance to the correct table.
379 * then based on the current temperature
380 * find the next state need to transaction to
381 * go through all the possible (IWL_TI_STATE_MAX - 1) entries
382 * in the current table to see if transaction is needed
383 */
384 transaction = tt->transaction +
385 ((old_state * (IWL_TI_STATE_MAX - 1)) + i);
386 if (temp >= transaction->tt_low &&
387 temp <= transaction->tt_high) {
388 #ifdef CONFIG_IWLWIFI_DEBUG
389 if ((tt->tt_previous_temp) &&
390 (temp > tt->tt_previous_temp) &&
391 ((temp - tt->tt_previous_temp) >
392 IWL_TT_INCREASE_MARGIN)) {
393 IWL_DEBUG_TEMP(priv,
394 "Temperature increase %d "
395 "degree Celsius\n",
396 (temp - tt->tt_previous_temp));
397 }
398 tt->tt_previous_temp = temp;
399 #endif
400 if (old_state !=
401 transaction->next_state) {
402 changed = true;
403 tt->state =
404 transaction->next_state;
405 }
406 break;
407 }
408 }
409 /* stop ct_kill_waiting_tm timer */
410 del_timer_sync(&priv->thermal_throttle.ct_kill_waiting_tm);
411 if (changed) {
412 if (tt->state >= IWL_TI_1) {
413 /* force PI = IWL_POWER_INDEX_5 in the case of TI > 0 */
414 tt->tt_power_mode = IWL_POWER_INDEX_5;
415
416 if (!iwl_ht_enabled(priv)) {
417 struct iwl_rxon_context *ctx;
418
419 for_each_context(priv, ctx) {
420 struct iwl_rxon_cmd *rxon;
421
422 rxon = &ctx->staging;
423
424 /* disable HT */
425 rxon->flags &= ~(
426 RXON_FLG_CHANNEL_MODE_MSK |
427 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
428 RXON_FLG_HT40_PROT_MSK |
429 RXON_FLG_HT_PROT_MSK);
430 }
431 } else {
432 /* check HT capability and set
433 * according to the system HT capability
434 * in case get disabled before */
435 iwl_set_rxon_ht(priv, &priv->current_ht_config);
436 }
437
438 } else {
439 /*
440 * restore system power setting -- it will be
441 * recalculated automatically.
442 */
443
444 /* check HT capability and set
445 * according to the system HT capability
446 * in case get disabled before */
447 iwl_set_rxon_ht(priv, &priv->current_ht_config);
448 }
449 mutex_lock(&priv->mutex);
450 if (old_state == IWL_TI_CT_KILL)
451 clear_bit(STATUS_CT_KILL, &priv->status);
452 if (tt->state != IWL_TI_CT_KILL &&
453 iwl_power_update_mode(priv, true)) {
454 /* TT state not updated
455 * try again during next temperature read
456 */
457 IWL_ERR(priv, "Cannot update power mode, "
458 "TT state not updated\n");
459 if (old_state == IWL_TI_CT_KILL)
460 set_bit(STATUS_CT_KILL, &priv->status);
461 tt->state = old_state;
462 } else {
463 IWL_DEBUG_TEMP(priv,
464 "Thermal Throttling to new state: %u\n",
465 tt->state);
466 if (old_state != IWL_TI_CT_KILL &&
467 tt->state == IWL_TI_CT_KILL) {
468 if (force) {
469 IWL_DEBUG_TEMP(priv,
470 "Enter IWL_TI_CT_KILL\n");
471 set_bit(STATUS_CT_KILL, &priv->status);
472 iwl_perform_ct_kill_task(priv, true);
473 } else {
474 tt->state = old_state;
475 iwl_prepare_ct_kill_task(priv);
476 }
477 } else if (old_state == IWL_TI_CT_KILL &&
478 tt->state != IWL_TI_CT_KILL) {
479 IWL_DEBUG_TEMP(priv, "Exit IWL_TI_CT_KILL\n");
480 iwl_perform_ct_kill_task(priv, false);
481 }
482 }
483 mutex_unlock(&priv->mutex);
484 }
485 }
486
487 /* Card State Notification indicated reach critical temperature
488 * if PSP not enable, no Thermal Throttling function will be performed
489 * just set the GP1 bit to acknowledge the event
490 * otherwise, go into IWL_TI_CT_KILL state
491 * since Card State Notification will not provide any temperature reading
492 * for Legacy mode
493 * so just pass the CT_KILL temperature to iwl_legacy_tt_handler()
494 * for advance mode
495 * pass CT_KILL_THRESHOLD+1 to make sure move into IWL_TI_CT_KILL state
496 */
497 static void iwl_bg_ct_enter(struct work_struct *work)
498 {
499 struct iwl_priv *priv = container_of(work, struct iwl_priv, ct_enter);
500 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
501
502 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
503 return;
504
505 if (!iwl_is_ready(priv))
506 return;
507
508 if (tt->state != IWL_TI_CT_KILL) {
509 IWL_ERR(priv, "Device reached critical temperature "
510 "- ucode going to sleep!\n");
511 if (!priv->thermal_throttle.advanced_tt)
512 iwl_legacy_tt_handler(priv,
513 IWL_MINIMAL_POWER_THRESHOLD,
514 true);
515 else
516 iwl_advance_tt_handler(priv,
517 CT_KILL_THRESHOLD + 1, true);
518 }
519 }
520
521 /* Card State Notification indicated out of critical temperature
522 * since Card State Notification will not provide any temperature reading
523 * so pass the IWL_REDUCED_PERFORMANCE_THRESHOLD_2 temperature
524 * to iwl_legacy_tt_handler() to get out of IWL_CT_KILL state
525 */
526 static void iwl_bg_ct_exit(struct work_struct *work)
527 {
528 struct iwl_priv *priv = container_of(work, struct iwl_priv, ct_exit);
529 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
530
531 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
532 return;
533
534 if (!iwl_is_ready(priv))
535 return;
536
537 /* stop ct_kill_exit_tm timer */
538 del_timer_sync(&priv->thermal_throttle.ct_kill_exit_tm);
539
540 if (tt->state == IWL_TI_CT_KILL) {
541 IWL_ERR(priv,
542 "Device temperature below critical"
543 "- ucode awake!\n");
544 /*
545 * exit from CT_KILL state
546 * reset the current temperature reading
547 */
548 priv->temperature = 0;
549 if (!priv->thermal_throttle.advanced_tt)
550 iwl_legacy_tt_handler(priv,
551 IWL_REDUCED_PERFORMANCE_THRESHOLD_2,
552 true);
553 else
554 iwl_advance_tt_handler(priv, CT_KILL_EXIT_THRESHOLD,
555 true);
556 }
557 }
558
559 void iwl_tt_enter_ct_kill(struct iwl_priv *priv)
560 {
561 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
562 return;
563
564 IWL_DEBUG_TEMP(priv, "Queueing critical temperature enter.\n");
565 queue_work(priv->workqueue, &priv->ct_enter);
566 }
567
568 void iwl_tt_exit_ct_kill(struct iwl_priv *priv)
569 {
570 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
571 return;
572
573 IWL_DEBUG_TEMP(priv, "Queueing critical temperature exit.\n");
574 queue_work(priv->workqueue, &priv->ct_exit);
575 }
576
577 static void iwl_bg_tt_work(struct work_struct *work)
578 {
579 struct iwl_priv *priv = container_of(work, struct iwl_priv, tt_work);
580 s32 temp = priv->temperature; /* degrees CELSIUS except specified */
581
582 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
583 return;
584
585 if (!priv->thermal_throttle.advanced_tt)
586 iwl_legacy_tt_handler(priv, temp, false);
587 else
588 iwl_advance_tt_handler(priv, temp, false);
589 }
590
591 void iwl_tt_handler(struct iwl_priv *priv)
592 {
593 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
594 return;
595
596 IWL_DEBUG_TEMP(priv, "Queueing thermal throttling work.\n");
597 queue_work(priv->workqueue, &priv->tt_work);
598 }
599
600 /* Thermal throttling initialization
601 * For advance thermal throttling:
602 * Initialize Thermal Index and temperature threshold table
603 * Initialize thermal throttling restriction table
604 */
605 void iwl_tt_initialize(struct iwl_priv *priv)
606 {
607 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
608 int size = sizeof(struct iwl_tt_trans) * (IWL_TI_STATE_MAX - 1);
609 struct iwl_tt_trans *transaction;
610
611 IWL_DEBUG_TEMP(priv, "Initialize Thermal Throttling\n");
612
613 memset(tt, 0, sizeof(struct iwl_tt_mgmt));
614
615 tt->state = IWL_TI_0;
616 init_timer(&priv->thermal_throttle.ct_kill_exit_tm);
617 priv->thermal_throttle.ct_kill_exit_tm.data = (unsigned long)priv;
618 priv->thermal_throttle.ct_kill_exit_tm.function =
619 iwl_tt_check_exit_ct_kill;
620 init_timer(&priv->thermal_throttle.ct_kill_waiting_tm);
621 priv->thermal_throttle.ct_kill_waiting_tm.data =
622 (unsigned long)priv;
623 priv->thermal_throttle.ct_kill_waiting_tm.function =
624 iwl_tt_ready_for_ct_kill;
625 /* setup deferred ct kill work */
626 INIT_WORK(&priv->tt_work, iwl_bg_tt_work);
627 INIT_WORK(&priv->ct_enter, iwl_bg_ct_enter);
628 INIT_WORK(&priv->ct_exit, iwl_bg_ct_exit);
629
630 if (priv->lib->adv_thermal_throttle) {
631 IWL_DEBUG_TEMP(priv, "Advanced Thermal Throttling\n");
632 tt->restriction = kcalloc(IWL_TI_STATE_MAX,
633 sizeof(struct iwl_tt_restriction),
634 GFP_KERNEL);
635 tt->transaction = kcalloc(IWL_TI_STATE_MAX *
636 (IWL_TI_STATE_MAX - 1),
637 sizeof(struct iwl_tt_trans),
638 GFP_KERNEL);
639 if (!tt->restriction || !tt->transaction) {
640 IWL_ERR(priv, "Fallback to Legacy Throttling\n");
641 priv->thermal_throttle.advanced_tt = false;
642 kfree(tt->restriction);
643 tt->restriction = NULL;
644 kfree(tt->transaction);
645 tt->transaction = NULL;
646 } else {
647 transaction = tt->transaction +
648 (IWL_TI_0 * (IWL_TI_STATE_MAX - 1));
649 memcpy(transaction, &tt_range_0[0], size);
650 transaction = tt->transaction +
651 (IWL_TI_1 * (IWL_TI_STATE_MAX - 1));
652 memcpy(transaction, &tt_range_1[0], size);
653 transaction = tt->transaction +
654 (IWL_TI_2 * (IWL_TI_STATE_MAX - 1));
655 memcpy(transaction, &tt_range_2[0], size);
656 transaction = tt->transaction +
657 (IWL_TI_CT_KILL * (IWL_TI_STATE_MAX - 1));
658 memcpy(transaction, &tt_range_3[0], size);
659 size = sizeof(struct iwl_tt_restriction) *
660 IWL_TI_STATE_MAX;
661 memcpy(tt->restriction,
662 &restriction_range[0], size);
663 priv->thermal_throttle.advanced_tt = true;
664 }
665 } else {
666 IWL_DEBUG_TEMP(priv, "Legacy Thermal Throttling\n");
667 priv->thermal_throttle.advanced_tt = false;
668 }
669 }
670
671 /* cleanup thermal throttling management related memory and timer */
672 void iwl_tt_exit(struct iwl_priv *priv)
673 {
674 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
675
676 /* stop ct_kill_exit_tm timer if activated */
677 del_timer_sync(&priv->thermal_throttle.ct_kill_exit_tm);
678 /* stop ct_kill_waiting_tm timer if activated */
679 del_timer_sync(&priv->thermal_throttle.ct_kill_waiting_tm);
680 cancel_work_sync(&priv->tt_work);
681 cancel_work_sync(&priv->ct_enter);
682 cancel_work_sync(&priv->ct_exit);
683
684 if (priv->thermal_throttle.advanced_tt) {
685 /* free advance thermal throttling memory */
686 kfree(tt->restriction);
687 tt->restriction = NULL;
688 kfree(tt->transaction);
689 tt->transaction = NULL;
690 }
691 }
Linux with added FPC-III support