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Add linux-next specific files for 20110831
[linux-2.6/next.git] / drivers / net / wireless / iwlwifi / iwl-agn-tt.c
blob92ba8cd0ecd50f12196def3916a6df7e3a2119c0
1 /******************************************************************************
2 *
3 * Copyright(c) 2007 - 2011 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
35 #include <net/mac80211.h>
36
37 #include "iwl-eeprom.h"
38 #include "iwl-dev.h"
39 #include "iwl-core.h"
40 #include "iwl-io.h"
41 #include "iwl-commands.h"
42 #include "iwl-debug.h"
43 #include "iwl-agn-tt.h"
44
45 /* default Thermal Throttling transaction table
46 * Current state | Throttling Down | Throttling Up
47 *=============================================================================
48 * Condition Nxt State Condition Nxt State Condition Nxt State
49 *-----------------------------------------------------------------------------
50 * IWL_TI_0 T >= 114 CT_KILL 114>T>=105 TI_1 N/A N/A
51 * IWL_TI_1 T >= 114 CT_KILL 114>T>=110 TI_2 T<=95 TI_0
52 * IWL_TI_2 T >= 114 CT_KILL T<=100 TI_1
53 * IWL_CT_KILL N/A N/A N/A N/A T<=95 TI_0
54 *=============================================================================
55 */
56 static const struct iwl_tt_trans tt_range_0[IWL_TI_STATE_MAX - 1] = {
57 {IWL_TI_0, IWL_ABSOLUTE_ZERO, 104},
58 {IWL_TI_1, 105, CT_KILL_THRESHOLD - 1},
59 {IWL_TI_CT_KILL, CT_KILL_THRESHOLD, IWL_ABSOLUTE_MAX}
60 };
61 static const struct iwl_tt_trans tt_range_1[IWL_TI_STATE_MAX - 1] = {
62 {IWL_TI_0, IWL_ABSOLUTE_ZERO, 95},
63 {IWL_TI_2, 110, CT_KILL_THRESHOLD - 1},
64 {IWL_TI_CT_KILL, CT_KILL_THRESHOLD, IWL_ABSOLUTE_MAX}
65 };
66 static const struct iwl_tt_trans tt_range_2[IWL_TI_STATE_MAX - 1] = {
67 {IWL_TI_1, IWL_ABSOLUTE_ZERO, 100},
68 {IWL_TI_CT_KILL, CT_KILL_THRESHOLD, IWL_ABSOLUTE_MAX},
69 {IWL_TI_CT_KILL, CT_KILL_THRESHOLD, IWL_ABSOLUTE_MAX}
70 };
71 static const struct iwl_tt_trans tt_range_3[IWL_TI_STATE_MAX - 1] = {
72 {IWL_TI_0, IWL_ABSOLUTE_ZERO, CT_KILL_EXIT_THRESHOLD},
73 {IWL_TI_CT_KILL, CT_KILL_EXIT_THRESHOLD + 1, IWL_ABSOLUTE_MAX},
74 {IWL_TI_CT_KILL, CT_KILL_EXIT_THRESHOLD + 1, IWL_ABSOLUTE_MAX}
75 };
76
77 /* Advance Thermal Throttling default restriction table */
78 static const struct iwl_tt_restriction restriction_range[IWL_TI_STATE_MAX] = {
79 {IWL_ANT_OK_MULTI, IWL_ANT_OK_MULTI, true },
80 {IWL_ANT_OK_SINGLE, IWL_ANT_OK_MULTI, true },
81 {IWL_ANT_OK_SINGLE, IWL_ANT_OK_SINGLE, false },
82 {IWL_ANT_OK_NONE, IWL_ANT_OK_NONE, false }
83 };
84
85 bool iwl_tt_is_low_power_state(struct iwl_priv *priv)
86 {
87 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
88
89 if (tt->state >= IWL_TI_1)
90 return true;
91 return false;
92 }
93
94 u8 iwl_tt_current_power_mode(struct iwl_priv *priv)
95 {
96 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
97
98 return tt->tt_power_mode;
99 }
100
101 bool iwl_ht_enabled(struct iwl_priv *priv)
102 {
103 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
104 struct iwl_tt_restriction *restriction;
105
106 if (!priv->thermal_throttle.advanced_tt)
107 return true;
108 restriction = tt->restriction + tt->state;
109 return restriction->is_ht;
110 }
111
112 static bool iwl_within_ct_kill_margin(struct iwl_priv *priv)
113 {
114 s32 temp = priv->temperature; /* degrees CELSIUS except specified */
115 bool within_margin = false;
116
117 if (priv->cfg->base_params->temperature_kelvin)
118 temp = KELVIN_TO_CELSIUS(priv->temperature);
119
120 if (!priv->thermal_throttle.advanced_tt)
121 within_margin = ((temp + IWL_TT_CT_KILL_MARGIN) >=
122 CT_KILL_THRESHOLD_LEGACY) ? true : false;
123 else
124 within_margin = ((temp + IWL_TT_CT_KILL_MARGIN) >=
125 CT_KILL_THRESHOLD) ? true : false;
126 return within_margin;
127 }
128
129 bool iwl_check_for_ct_kill(struct iwl_priv *priv)
130 {
131 bool is_ct_kill = false;
132
133 if (iwl_within_ct_kill_margin(priv)) {
134 iwl_tt_enter_ct_kill(priv);
135 is_ct_kill = true;
136 }
137 return is_ct_kill;
138 }
139
140 enum iwl_antenna_ok iwl_tx_ant_restriction(struct iwl_priv *priv)
141 {
142 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
143 struct iwl_tt_restriction *restriction;
144
145 if (!priv->thermal_throttle.advanced_tt)
146 return IWL_ANT_OK_MULTI;
147 restriction = tt->restriction + tt->state;
148 return restriction->tx_stream;
149 }
150
151 enum iwl_antenna_ok iwl_rx_ant_restriction(struct iwl_priv *priv)
152 {
153 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
154 struct iwl_tt_restriction *restriction;
155
156 if (!priv->thermal_throttle.advanced_tt)
157 return IWL_ANT_OK_MULTI;
158 restriction = tt->restriction + tt->state;
159 return restriction->rx_stream;
160 }
161
162 #define CT_KILL_EXIT_DURATION (5) /* 5 seconds duration */
163 #define CT_KILL_WAITING_DURATION (300) /* 300ms duration */
164
165 /*
166 * toggle the bit to wake up uCode and check the temperature
167 * if the temperature is below CT, uCode will stay awake and send card
168 * state notification with CT_KILL bit clear to inform Thermal Throttling
169 * Management to change state. Otherwise, uCode will go back to sleep
170 * without doing anything, driver should continue the 5 seconds timer
171 * to wake up uCode for temperature check until temperature drop below CT
172 */
173 static void iwl_tt_check_exit_ct_kill(unsigned long data)
174 {
175 struct iwl_priv *priv = (struct iwl_priv *)data;
176 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
177 unsigned long flags;
178
179 if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
180 return;
181
182 if (tt->state == IWL_TI_CT_KILL) {
183 if (priv->thermal_throttle.ct_kill_toggle) {
184 iwl_write32(bus(priv), CSR_UCODE_DRV_GP1_CLR,
185 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
186 priv->thermal_throttle.ct_kill_toggle = false;
187 } else {
188 iwl_write32(bus(priv), CSR_UCODE_DRV_GP1_SET,
189 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
190 priv->thermal_throttle.ct_kill_toggle = true;
191 }
192 iwl_read32(bus(priv), CSR_UCODE_DRV_GP1);
193 spin_lock_irqsave(&bus(priv)->reg_lock, flags);
194 if (!iwl_grab_nic_access(bus(priv)))
195 iwl_release_nic_access(bus(priv));
196 spin_unlock_irqrestore(&bus(priv)->reg_lock, flags);
197
198 /* Reschedule the ct_kill timer to occur in
199 * CT_KILL_EXIT_DURATION seconds to ensure we get a
200 * thermal update */
201 IWL_DEBUG_TEMP(priv, "schedule ct_kill exit timer\n");
202 mod_timer(&priv->thermal_throttle.ct_kill_exit_tm,
203 jiffies + CT_KILL_EXIT_DURATION * HZ);
204 }
205 }
206
207 static void iwl_perform_ct_kill_task(struct iwl_priv *priv,
208 bool stop)
209 {
210 if (stop) {
211 IWL_DEBUG_TEMP(priv, "Stop all queues\n");
212 if (priv->shrd->mac80211_registered)
213 ieee80211_stop_queues(priv->hw);
214 IWL_DEBUG_TEMP(priv,
215 "Schedule 5 seconds CT_KILL Timer\n");
216 mod_timer(&priv->thermal_throttle.ct_kill_exit_tm,
217 jiffies + CT_KILL_EXIT_DURATION * HZ);
218 } else {
219 IWL_DEBUG_TEMP(priv, "Wake all queues\n");
220 if (priv->shrd->mac80211_registered)
221 ieee80211_wake_queues(priv->hw);
222 }
223 }
224
225 static void iwl_tt_ready_for_ct_kill(unsigned long data)
226 {
227 struct iwl_priv *priv = (struct iwl_priv *)data;
228 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
229
230 if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
231 return;
232
233 /* temperature timer expired, ready to go into CT_KILL state */
234 if (tt->state != IWL_TI_CT_KILL) {
235 IWL_DEBUG_TEMP(priv, "entering CT_KILL state when "
236 "temperature timer expired\n");
237 tt->state = IWL_TI_CT_KILL;
238 set_bit(STATUS_CT_KILL, &priv->shrd->status);
239 iwl_perform_ct_kill_task(priv, true);
240 }
241 }
242
243 static void iwl_prepare_ct_kill_task(struct iwl_priv *priv)
244 {
245 IWL_DEBUG_TEMP(priv, "Prepare to enter IWL_TI_CT_KILL\n");
246 /* make request to retrieve statistics information */
247 iwl_send_statistics_request(priv, CMD_SYNC, false);
248 /* Reschedule the ct_kill wait timer */
249 mod_timer(&priv->thermal_throttle.ct_kill_waiting_tm,
250 jiffies + msecs_to_jiffies(CT_KILL_WAITING_DURATION));
251 }
252
253 #define IWL_MINIMAL_POWER_THRESHOLD (CT_KILL_THRESHOLD_LEGACY)
254 #define IWL_REDUCED_PERFORMANCE_THRESHOLD_2 (100)
255 #define IWL_REDUCED_PERFORMANCE_THRESHOLD_1 (90)
256
257 /*
258 * Legacy thermal throttling
259 * 1) Avoid NIC destruction due to high temperatures
260 * Chip will identify dangerously high temperatures that can
261 * harm the device and will power down
262 * 2) Avoid the NIC power down due to high temperature
263 * Throttle early enough to lower the power consumption before
264 * drastic steps are needed
265 */
266 static void iwl_legacy_tt_handler(struct iwl_priv *priv, s32 temp, bool force)
267 {
268 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
269 enum iwl_tt_state old_state;
270
271 #ifdef CONFIG_IWLWIFI_DEBUG
272 if ((tt->tt_previous_temp) &&
273 (temp > tt->tt_previous_temp) &&
274 ((temp - tt->tt_previous_temp) >
275 IWL_TT_INCREASE_MARGIN)) {
276 IWL_DEBUG_TEMP(priv,
277 "Temperature increase %d degree Celsius\n",
278 (temp - tt->tt_previous_temp));
279 }
280 #endif
281 old_state = tt->state;
282 /* in Celsius */
283 if (temp >= IWL_MINIMAL_POWER_THRESHOLD)
284 tt->state = IWL_TI_CT_KILL;
285 else if (temp >= IWL_REDUCED_PERFORMANCE_THRESHOLD_2)
286 tt->state = IWL_TI_2;
287 else if (temp >= IWL_REDUCED_PERFORMANCE_THRESHOLD_1)
288 tt->state = IWL_TI_1;
289 else
290 tt->state = IWL_TI_0;
291
292 #ifdef CONFIG_IWLWIFI_DEBUG
293 tt->tt_previous_temp = temp;
294 #endif
295 /* stop ct_kill_waiting_tm timer */
296 del_timer_sync(&priv->thermal_throttle.ct_kill_waiting_tm);
297 if (tt->state != old_state) {
298 switch (tt->state) {
299 case IWL_TI_0:
300 /*
301 * When the system is ready to go back to IWL_TI_0
302 * we only have to call iwl_power_update_mode() to
303 * do so.
304 */
305 break;
306 case IWL_TI_1:
307 tt->tt_power_mode = IWL_POWER_INDEX_3;
308 break;
309 case IWL_TI_2:
310 tt->tt_power_mode = IWL_POWER_INDEX_4;
311 break;
312 default:
313 tt->tt_power_mode = IWL_POWER_INDEX_5;
314 break;
315 }
316 mutex_lock(&priv->shrd->mutex);
317 if (old_state == IWL_TI_CT_KILL)
318 clear_bit(STATUS_CT_KILL, &priv->shrd->status);
319 if (tt->state != IWL_TI_CT_KILL &&
320 iwl_power_update_mode(priv, true)) {
321 /* TT state not updated
322 * try again during next temperature read
323 */
324 if (old_state == IWL_TI_CT_KILL)
325 set_bit(STATUS_CT_KILL, &priv->shrd->status);
326 tt->state = old_state;
327 IWL_ERR(priv, "Cannot update power mode, "
328 "TT state not updated\n");
329 } else {
330 if (tt->state == IWL_TI_CT_KILL) {
331 if (force) {
332 set_bit(STATUS_CT_KILL,
333 &priv->shrd->status);
334 iwl_perform_ct_kill_task(priv, true);
335 } else {
336 iwl_prepare_ct_kill_task(priv);
337 tt->state = old_state;
338 }
339 } else if (old_state == IWL_TI_CT_KILL &&
340 tt->state != IWL_TI_CT_KILL)
341 iwl_perform_ct_kill_task(priv, false);
342 IWL_DEBUG_TEMP(priv, "Temperature state changed %u\n",
343 tt->state);
344 IWL_DEBUG_TEMP(priv, "Power Index change to %u\n",
345 tt->tt_power_mode);
346 }
347 mutex_unlock(&priv->shrd->mutex);
348 }
349 }
350
351 /*
352 * Advance thermal throttling
353 * 1) Avoid NIC destruction due to high temperatures
354 * Chip will identify dangerously high temperatures that can
355 * harm the device and will power down
356 * 2) Avoid the NIC power down due to high temperature
357 * Throttle early enough to lower the power consumption before
358 * drastic steps are needed
359 * Actions include relaxing the power down sleep thresholds and
360 * decreasing the number of TX streams
361 * 3) Avoid throughput performance impact as much as possible
362 *
363 *=============================================================================
364 * Condition Nxt State Condition Nxt State Condition Nxt State
365 *-----------------------------------------------------------------------------
366 * IWL_TI_0 T >= 114 CT_KILL 114>T>=105 TI_1 N/A N/A
367 * IWL_TI_1 T >= 114 CT_KILL 114>T>=110 TI_2 T<=95 TI_0
368 * IWL_TI_2 T >= 114 CT_KILL T<=100 TI_1
369 * IWL_CT_KILL N/A N/A N/A N/A T<=95 TI_0
370 *=============================================================================
371 */
372 static void iwl_advance_tt_handler(struct iwl_priv *priv, s32 temp, bool force)
373 {
374 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
375 int i;
376 bool changed = false;
377 enum iwl_tt_state old_state;
378 struct iwl_tt_trans *transaction;
379
380 old_state = tt->state;
381 for (i = 0; i < IWL_TI_STATE_MAX - 1; i++) {
382 /* based on the current TT state,
383 * find the curresponding transaction table
384 * each table has (IWL_TI_STATE_MAX - 1) entries
385 * tt->transaction + ((old_state * (IWL_TI_STATE_MAX - 1))
386 * will advance to the correct table.
387 * then based on the current temperature
388 * find the next state need to transaction to
389 * go through all the possible (IWL_TI_STATE_MAX - 1) entries
390 * in the current table to see if transaction is needed
391 */
392 transaction = tt->transaction +
393 ((old_state * (IWL_TI_STATE_MAX - 1)) + i);
394 if (temp >= transaction->tt_low &&
395 temp <= transaction->tt_high) {
396 #ifdef CONFIG_IWLWIFI_DEBUG
397 if ((tt->tt_previous_temp) &&
398 (temp > tt->tt_previous_temp) &&
399 ((temp - tt->tt_previous_temp) >
400 IWL_TT_INCREASE_MARGIN)) {
401 IWL_DEBUG_TEMP(priv,
402 "Temperature increase %d "
403 "degree Celsius\n",
404 (temp - tt->tt_previous_temp));
405 }
406 tt->tt_previous_temp = temp;
407 #endif
408 if (old_state !=
409 transaction->next_state) {
410 changed = true;
411 tt->state =
412 transaction->next_state;
413 }
414 break;
415 }
416 }
417 /* stop ct_kill_waiting_tm timer */
418 del_timer_sync(&priv->thermal_throttle.ct_kill_waiting_tm);
419 if (changed) {
420 if (tt->state >= IWL_TI_1) {
421 /* force PI = IWL_POWER_INDEX_5 in the case of TI > 0 */
422 tt->tt_power_mode = IWL_POWER_INDEX_5;
423
424 if (!iwl_ht_enabled(priv)) {
425 struct iwl_rxon_context *ctx;
426
427 for_each_context(priv, ctx) {
428 struct iwl_rxon_cmd *rxon;
429
430 rxon = &ctx->staging;
431
432 /* disable HT */
433 rxon->flags &= ~(
434 RXON_FLG_CHANNEL_MODE_MSK |
435 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
436 RXON_FLG_HT40_PROT_MSK |
437 RXON_FLG_HT_PROT_MSK);
438 }
439 } else {
440 /* check HT capability and set
441 * according to the system HT capability
442 * in case get disabled before */
443 iwl_set_rxon_ht(priv, &priv->current_ht_config);
444 }
445
446 } else {
447 /*
448 * restore system power setting -- it will be
449 * recalculated automatically.
450 */
451
452 /* check HT capability and set
453 * according to the system HT capability
454 * in case get disabled before */
455 iwl_set_rxon_ht(priv, &priv->current_ht_config);
456 }
457 mutex_lock(&priv->shrd->mutex);
458 if (old_state == IWL_TI_CT_KILL)
459 clear_bit(STATUS_CT_KILL, &priv->shrd->status);
460 if (tt->state != IWL_TI_CT_KILL &&
461 iwl_power_update_mode(priv, true)) {
462 /* TT state not updated
463 * try again during next temperature read
464 */
465 IWL_ERR(priv, "Cannot update power mode, "
466 "TT state not updated\n");
467 if (old_state == IWL_TI_CT_KILL)
468 set_bit(STATUS_CT_KILL, &priv->shrd->status);
469 tt->state = old_state;
470 } else {
471 IWL_DEBUG_TEMP(priv,
472 "Thermal Throttling to new state: %u\n",
473 tt->state);
474 if (old_state != IWL_TI_CT_KILL &&
475 tt->state == IWL_TI_CT_KILL) {
476 if (force) {
477 IWL_DEBUG_TEMP(priv,
478 "Enter IWL_TI_CT_KILL\n");
479 set_bit(STATUS_CT_KILL,
480 &priv->shrd->status);
481 iwl_perform_ct_kill_task(priv, true);
482 } else {
483 iwl_prepare_ct_kill_task(priv);
484 tt->state = old_state;
485 }
486 } else if (old_state == IWL_TI_CT_KILL &&
487 tt->state != IWL_TI_CT_KILL) {
488 IWL_DEBUG_TEMP(priv, "Exit IWL_TI_CT_KILL\n");
489 iwl_perform_ct_kill_task(priv, false);
490 }
491 }
492 mutex_unlock(&priv->shrd->mutex);
493 }
494 }
495
496 /* Card State Notification indicated reach critical temperature
497 * if PSP not enable, no Thermal Throttling function will be performed
498 * just set the GP1 bit to acknowledge the event
499 * otherwise, go into IWL_TI_CT_KILL state
500 * since Card State Notification will not provide any temperature reading
501 * for Legacy mode
502 * so just pass the CT_KILL temperature to iwl_legacy_tt_handler()
503 * for advance mode
504 * pass CT_KILL_THRESHOLD+1 to make sure move into IWL_TI_CT_KILL state
505 */
506 static void iwl_bg_ct_enter(struct work_struct *work)
507 {
508 struct iwl_priv *priv = container_of(work, struct iwl_priv, ct_enter);
509 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
510
511 if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
512 return;
513
514 if (!iwl_is_ready(priv->shrd))
515 return;
516
517 if (tt->state != IWL_TI_CT_KILL) {
518 IWL_ERR(priv, "Device reached critical temperature "
519 "- ucode going to sleep!\n");
520 if (!priv->thermal_throttle.advanced_tt)
521 iwl_legacy_tt_handler(priv,
522 IWL_MINIMAL_POWER_THRESHOLD,
523 true);
524 else
525 iwl_advance_tt_handler(priv,
526 CT_KILL_THRESHOLD + 1, true);
527 }
528 }
529
530 /* Card State Notification indicated out of critical temperature
531 * since Card State Notification will not provide any temperature reading
532 * so pass the IWL_REDUCED_PERFORMANCE_THRESHOLD_2 temperature
533 * to iwl_legacy_tt_handler() to get out of IWL_CT_KILL state
534 */
535 static void iwl_bg_ct_exit(struct work_struct *work)
536 {
537 struct iwl_priv *priv = container_of(work, struct iwl_priv, ct_exit);
538 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
539
540 if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
541 return;
542
543 if (!iwl_is_ready(priv->shrd))
544 return;
545
546 /* stop ct_kill_exit_tm timer */
547 del_timer_sync(&priv->thermal_throttle.ct_kill_exit_tm);
548
549 if (tt->state == IWL_TI_CT_KILL) {
550 IWL_ERR(priv,
551 "Device temperature below critical"
552 "- ucode awake!\n");
553 /*
554 * exit from CT_KILL state
555 * reset the current temperature reading
556 */
557 priv->temperature = 0;
558 if (!priv->thermal_throttle.advanced_tt)
559 iwl_legacy_tt_handler(priv,
560 IWL_REDUCED_PERFORMANCE_THRESHOLD_2,
561 true);
562 else
563 iwl_advance_tt_handler(priv, CT_KILL_EXIT_THRESHOLD,
564 true);
565 }
566 }
567
568 void iwl_tt_enter_ct_kill(struct iwl_priv *priv)
569 {
570 if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
571 return;
572
573 IWL_DEBUG_TEMP(priv, "Queueing critical temperature enter.\n");
574 queue_work(priv->shrd->workqueue, &priv->ct_enter);
575 }
576
577 void iwl_tt_exit_ct_kill(struct iwl_priv *priv)
578 {
579 if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
580 return;
581
582 IWL_DEBUG_TEMP(priv, "Queueing critical temperature exit.\n");
583 queue_work(priv->shrd->workqueue, &priv->ct_exit);
584 }
585
586 static void iwl_bg_tt_work(struct work_struct *work)
587 {
588 struct iwl_priv *priv = container_of(work, struct iwl_priv, tt_work);
589 s32 temp = priv->temperature; /* degrees CELSIUS except specified */
590
591 if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
592 return;
593
594 if (priv->cfg->base_params->temperature_kelvin)
595 temp = KELVIN_TO_CELSIUS(priv->temperature);
596
597 if (!priv->thermal_throttle.advanced_tt)
598 iwl_legacy_tt_handler(priv, temp, false);
599 else
600 iwl_advance_tt_handler(priv, temp, false);
601 }
602
603 void iwl_tt_handler(struct iwl_priv *priv)
604 {
605 if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
606 return;
607
608 IWL_DEBUG_TEMP(priv, "Queueing thermal throttling work.\n");
609 queue_work(priv->shrd->workqueue, &priv->tt_work);
610 }
611
612 /* Thermal throttling initialization
613 * For advance thermal throttling:
614 * Initialize Thermal Index and temperature threshold table
615 * Initialize thermal throttling restriction table
616 */
617 void iwl_tt_initialize(struct iwl_priv *priv)
618 {
619 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
620 int size = sizeof(struct iwl_tt_trans) * (IWL_TI_STATE_MAX - 1);
621 struct iwl_tt_trans *transaction;
622
623 IWL_DEBUG_TEMP(priv, "Initialize Thermal Throttling\n");
624
625 memset(tt, 0, sizeof(struct iwl_tt_mgmt));
626
627 tt->state = IWL_TI_0;
628 init_timer(&priv->thermal_throttle.ct_kill_exit_tm);
629 priv->thermal_throttle.ct_kill_exit_tm.data = (unsigned long)priv;
630 priv->thermal_throttle.ct_kill_exit_tm.function =
631 iwl_tt_check_exit_ct_kill;
632 init_timer(&priv->thermal_throttle.ct_kill_waiting_tm);
633 priv->thermal_throttle.ct_kill_waiting_tm.data =
634 (unsigned long)priv;
635 priv->thermal_throttle.ct_kill_waiting_tm.function =
636 iwl_tt_ready_for_ct_kill;
637 /* setup deferred ct kill work */
638 INIT_WORK(&priv->tt_work, iwl_bg_tt_work);
639 INIT_WORK(&priv->ct_enter, iwl_bg_ct_enter);
640 INIT_WORK(&priv->ct_exit, iwl_bg_ct_exit);
641
642 if (priv->cfg->base_params->adv_thermal_throttle) {
643 IWL_DEBUG_TEMP(priv, "Advanced Thermal Throttling\n");
644 tt->restriction = kzalloc(sizeof(struct iwl_tt_restriction) *
645 IWL_TI_STATE_MAX, GFP_KERNEL);
646 tt->transaction = kzalloc(sizeof(struct iwl_tt_trans) *
647 IWL_TI_STATE_MAX * (IWL_TI_STATE_MAX - 1),
648 GFP_KERNEL);
649 if (!tt->restriction || !tt->transaction) {
650 IWL_ERR(priv, "Fallback to Legacy Throttling\n");
651 priv->thermal_throttle.advanced_tt = false;
652 kfree(tt->restriction);
653 tt->restriction = NULL;
654 kfree(tt->transaction);
655 tt->transaction = NULL;
656 } else {
657 transaction = tt->transaction +
658 (IWL_TI_0 * (IWL_TI_STATE_MAX - 1));
659 memcpy(transaction, &tt_range_0[0], size);
660 transaction = tt->transaction +
661 (IWL_TI_1 * (IWL_TI_STATE_MAX - 1));
662 memcpy(transaction, &tt_range_1[0], size);
663 transaction = tt->transaction +
664 (IWL_TI_2 * (IWL_TI_STATE_MAX - 1));
665 memcpy(transaction, &tt_range_2[0], size);
666 transaction = tt->transaction +
667 (IWL_TI_CT_KILL * (IWL_TI_STATE_MAX - 1));
668 memcpy(transaction, &tt_range_3[0], size);
669 size = sizeof(struct iwl_tt_restriction) *
670 IWL_TI_STATE_MAX;
671 memcpy(tt->restriction,
672 &restriction_range[0], size);
673 priv->thermal_throttle.advanced_tt = true;
674 }
675 } else {
676 IWL_DEBUG_TEMP(priv, "Legacy Thermal Throttling\n");
677 priv->thermal_throttle.advanced_tt = false;
678 }
679 }
680
681 /* cleanup thermal throttling management related memory and timer */
682 void iwl_tt_exit(struct iwl_priv *priv)
683 {
684 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
685
686 /* stop ct_kill_exit_tm timer if activated */
687 del_timer_sync(&priv->thermal_throttle.ct_kill_exit_tm);
688 /* stop ct_kill_waiting_tm timer if activated */
689 del_timer_sync(&priv->thermal_throttle.ct_kill_waiting_tm);
690 cancel_work_sync(&priv->tt_work);
691 cancel_work_sync(&priv->ct_enter);
692 cancel_work_sync(&priv->ct_exit);
693
694 if (priv->thermal_throttle.advanced_tt) {
695 /* free advance thermal throttling memory */
696 kfree(tt->restriction);
697 tt->restriction = NULL;
698 kfree(tt->transaction);
699 tt->transaction = NULL;
700 }
701 }
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