1 /******************************************************************************
3 * Copyright(c) 2007 - 2009 Intel Corporation. All rights reserved.
5 * Portions of this file are derived from the ipw3945 project, as well
6 * as portions of the ieee80211 subsystem header files.
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.
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
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
21 * The full GNU General Public License is included in this distribution in the
22 * file called LICENSE.
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 *****************************************************************************/
30 #include <linux/kernel.h>
31 #include <linux/module.h>
32 #include <linux/init.h>
34 #include <net/mac80211.h>
36 #include "iwl-eeprom.h"
40 #include "iwl-commands.h"
41 #include "iwl-debug.h"
42 #include "iwl-power.h"
45 * Setting power level allow the card to go to sleep when not busy.
47 * The power level is set to INDEX_1 (the least deep state) by
48 * default, and will, in the future, be the deepest state unless
49 * otherwise required by pm_qos network latency requirements.
51 * Using INDEX_1 without pm_qos is ok because mac80211 will disable
52 * PS when even checking every beacon for the TIM bit would exceed
53 * the required latency.
56 #define IWL_POWER_RANGE_0_MAX (2)
57 #define IWL_POWER_RANGE_1_MAX (10)
60 #define NOSLP cpu_to_le16(0), 0, 0
61 #define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK, 0, 0
62 #define TU_TO_USEC 1024
63 #define SLP_TOUT(T) cpu_to_le32((T) * TU_TO_USEC)
64 #define SLP_VEC(X0, X1, X2, X3, X4) {cpu_to_le32(X0), \
69 /* default power management (not Tx power) table values */
70 /* for DTIM period 0 through IWL_POWER_RANGE_0_MAX */
71 static const struct iwl_power_vec_entry range_0[IWL_POWER_NUM] = {
72 {{NOSLP, SLP_TOUT(0), SLP_TOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
73 {{SLP, SLP_TOUT(200), SLP_TOUT(500), SLP_VEC(1, 2, 2, 2, 0xFF)}, 0},
74 {{SLP, SLP_TOUT(200), SLP_TOUT(300), SLP_VEC(1, 2, 2, 2, 0xFF)}, 0},
75 {{SLP, SLP_TOUT(50), SLP_TOUT(100), SLP_VEC(2, 2, 2, 2, 0xFF)}, 0},
76 {{SLP, SLP_TOUT(50), SLP_TOUT(25), SLP_VEC(2, 2, 4, 4, 0xFF)}, 1},
77 {{SLP, SLP_TOUT(25), SLP_TOUT(25), SLP_VEC(2, 2, 4, 6, 0xFF)}, 2}
81 /* for DTIM period IWL_POWER_RANGE_0_MAX + 1 through IWL_POWER_RANGE_1_MAX */
82 static const struct iwl_power_vec_entry range_1[IWL_POWER_NUM] = {
83 {{NOSLP, SLP_TOUT(0), SLP_TOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
84 {{SLP, SLP_TOUT(200), SLP_TOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
85 {{SLP, SLP_TOUT(200), SLP_TOUT(300), SLP_VEC(1, 2, 3, 4, 7)}, 0},
86 {{SLP, SLP_TOUT(50), SLP_TOUT(100), SLP_VEC(2, 4, 6, 7, 9)}, 0},
87 {{SLP, SLP_TOUT(50), SLP_TOUT(25), SLP_VEC(2, 4, 6, 9, 10)}, 1},
88 {{SLP, SLP_TOUT(25), SLP_TOUT(25), SLP_VEC(2, 4, 7, 10, 10)}, 2}
91 /* for DTIM period > IWL_POWER_RANGE_1_MAX */
92 static const struct iwl_power_vec_entry range_2[IWL_POWER_NUM] = {
93 {{NOSLP, SLP_TOUT(0), SLP_TOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
94 {{SLP, SLP_TOUT(200), SLP_TOUT(500), SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
95 {{SLP, SLP_TOUT(200), SLP_TOUT(300), SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
96 {{SLP, SLP_TOUT(50), SLP_TOUT(100), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
97 {{SLP, SLP_TOUT(50), SLP_TOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
98 {{SLP, SLP_TOUT(25), SLP_TOUT(25), SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
101 /* default Thermal Throttling transaction table
102 * Current state | Throttling Down | Throttling Up
103 *=============================================================================
104 * Condition Nxt State Condition Nxt State Condition Nxt State
105 *-----------------------------------------------------------------------------
106 * IWL_TI_0 T >= 115 CT_KILL 115>T>=105 TI_1 N/A N/A
107 * IWL_TI_1 T >= 115 CT_KILL 115>T>=110 TI_2 T<=95 TI_0
108 * IWL_TI_2 T >= 115 CT_KILL T<=100 TI_1
109 * IWL_CT_KILL N/A N/A N/A N/A T<=95 TI_0
110 *=============================================================================
112 static const struct iwl_tt_trans tt_range_0[IWL_TI_STATE_MAX - 1] = {
113 {IWL_TI_0, IWL_ABSOLUTE_ZERO, 104},
114 {IWL_TI_1, 105, CT_KILL_THRESHOLD},
115 {IWL_TI_CT_KILL, CT_KILL_THRESHOLD + 1, IWL_ABSOLUTE_MAX}
117 static const struct iwl_tt_trans tt_range_1[IWL_TI_STATE_MAX - 1] = {
118 {IWL_TI_0, IWL_ABSOLUTE_ZERO, 95},
119 {IWL_TI_2, 110, CT_KILL_THRESHOLD},
120 {IWL_TI_CT_KILL, CT_KILL_THRESHOLD + 1, IWL_ABSOLUTE_MAX}
122 static const struct iwl_tt_trans tt_range_2[IWL_TI_STATE_MAX - 1] = {
123 {IWL_TI_1, IWL_ABSOLUTE_ZERO, 100},
124 {IWL_TI_CT_KILL, CT_KILL_THRESHOLD + 1, IWL_ABSOLUTE_MAX},
125 {IWL_TI_CT_KILL, CT_KILL_THRESHOLD + 1, IWL_ABSOLUTE_MAX}
127 static const struct iwl_tt_trans tt_range_3[IWL_TI_STATE_MAX - 1] = {
128 {IWL_TI_0, IWL_ABSOLUTE_ZERO, CT_KILL_EXIT_THRESHOLD},
129 {IWL_TI_CT_KILL, CT_KILL_EXIT_THRESHOLD + 1, IWL_ABSOLUTE_MAX},
130 {IWL_TI_CT_KILL, CT_KILL_EXIT_THRESHOLD + 1, IWL_ABSOLUTE_MAX}
133 /* Advance Thermal Throttling default restriction table */
134 static const struct iwl_tt_restriction restriction_range[IWL_TI_STATE_MAX] = {
135 {IWL_TX_MULTI, true, IWL_RX_MULTI},
136 {IWL_TX_SINGLE, true, IWL_RX_MULTI},
137 {IWL_TX_SINGLE, false, IWL_RX_SINGLE},
138 {IWL_TX_NONE, false, IWL_RX_NONE}
141 /* set card power command */
142 static int iwl_set_power(struct iwl_priv *priv, void *cmd)
144 return iwl_send_cmd_pdu(priv, POWER_TABLE_CMD,
145 sizeof(struct iwl_powertable_cmd), cmd);
148 /* initialize to default */
149 static void iwl_power_init_handle(struct iwl_priv *priv)
151 struct iwl_power_mgr *pow_data;
152 int size = sizeof(struct iwl_power_vec_entry) * IWL_POWER_NUM;
153 struct iwl_powertable_cmd *cmd;
157 IWL_DEBUG_POWER(priv, "Initialize power \n");
159 pow_data = &priv->power_data;
161 memset(pow_data, 0, sizeof(*pow_data));
163 memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
164 memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
165 memcpy(&pow_data->pwr_range_2[0], &range_2[0], size);
167 lctl = iwl_pcie_link_ctl(priv);
169 IWL_DEBUG_POWER(priv, "adjust power command flags\n");
171 for (i = 0; i < IWL_POWER_NUM; i++) {
172 cmd = &pow_data->pwr_range_0[i].cmd;
174 if (lctl & PCI_CFG_LINK_CTRL_VAL_L0S_EN)
175 cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
177 cmd->flags |= IWL_POWER_PCI_PM_MSK;
181 /* adjust power command according to DTIM period and power level*/
182 static int iwl_update_power_cmd(struct iwl_priv *priv,
183 struct iwl_powertable_cmd *cmd, u16 mode)
185 struct iwl_power_vec_entry *range;
186 struct iwl_power_mgr *pow_data;
192 if (mode > IWL_POWER_INDEX_5) {
193 IWL_DEBUG_POWER(priv, "Error invalid power mode \n");
197 pow_data = &priv->power_data;
199 if (pow_data->dtim_period <= IWL_POWER_RANGE_0_MAX)
200 range = &pow_data->pwr_range_0[0];
201 else if (pow_data->dtim_period <= IWL_POWER_RANGE_1_MAX)
202 range = &pow_data->pwr_range_1[0];
204 range = &pow_data->pwr_range_2[0];
206 period = pow_data->dtim_period;
207 memcpy(cmd, &range[mode].cmd, sizeof(struct iwl_powertable_cmd));
213 skip = !!range[mode].no_dtim;
217 __le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
218 max_sleep = le32_to_cpu(slp_itrvl);
219 if (max_sleep == 0xFF)
220 max_sleep = period * (skip + 1);
221 else if (max_sleep > period)
222 max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
223 cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
226 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
229 for (i = 0; i < IWL_POWER_VEC_SIZE; i++)
230 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
231 cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
233 IWL_DEBUG_POWER(priv, "Flags value = 0x%08X\n", cmd->flags);
234 IWL_DEBUG_POWER(priv, "Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
235 IWL_DEBUG_POWER(priv, "Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
236 IWL_DEBUG_POWER(priv, "Sleep interval vector = { %d , %d , %d , %d , %d }\n",
237 le32_to_cpu(cmd->sleep_interval[0]),
238 le32_to_cpu(cmd->sleep_interval[1]),
239 le32_to_cpu(cmd->sleep_interval[2]),
240 le32_to_cpu(cmd->sleep_interval[3]),
241 le32_to_cpu(cmd->sleep_interval[4]));
248 * compute the final power mode index
250 int iwl_power_update_mode(struct iwl_priv *priv, bool force)
252 struct iwl_power_mgr *setting = &(priv->power_data);
254 struct iwl_tt_mgmt *tt = &priv->power_data.tt;
255 u16 uninitialized_var(final_mode);
258 /* Don't update the RX chain when chain noise calibration is running */
259 update_chains = priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE ||
260 priv->chain_noise_data.state == IWL_CHAIN_NOISE_ALIVE;
262 final_mode = priv->power_data.user_power_setting;
264 if (setting->power_disabled)
265 final_mode = IWL_POWER_MODE_CAM;
267 if (tt->state >= IWL_TI_1) {
268 /* TT power setting overwrite user & system power setting */
269 final_mode = tt->tt_power_mode;
271 if (iwl_is_ready_rf(priv) &&
272 ((setting->power_mode != final_mode) || force)) {
273 struct iwl_powertable_cmd cmd;
275 if (final_mode != IWL_POWER_MODE_CAM)
276 set_bit(STATUS_POWER_PMI, &priv->status);
278 iwl_update_power_cmd(priv, &cmd, final_mode);
279 cmd.keep_alive_beacons = 0;
281 if (final_mode == IWL_POWER_INDEX_5)
282 cmd.flags |= IWL_POWER_FAST_PD;
284 ret = iwl_set_power(priv, &cmd);
286 if (final_mode == IWL_POWER_MODE_CAM)
287 clear_bit(STATUS_POWER_PMI, &priv->status);
289 if (priv->cfg->ops->lib->update_chain_flags &&
291 priv->cfg->ops->lib->update_chain_flags(priv);
293 IWL_DEBUG_POWER(priv,
294 "Cannot update the power, chain noise "
295 "calibration running: %d\n",
296 priv->chain_noise_data.state);
297 setting->power_mode = final_mode;
299 IWL_ERR(priv, "set power fail, ret = %d", ret);
304 EXPORT_SYMBOL(iwl_power_update_mode);
306 /* set user_power_setting */
307 int iwl_power_set_user_mode(struct iwl_priv *priv, u16 mode)
309 if (mode >= IWL_POWER_NUM)
312 priv->power_data.user_power_setting = mode;
314 return iwl_power_update_mode(priv, 0);
316 EXPORT_SYMBOL(iwl_power_set_user_mode);
318 bool iwl_ht_enabled(struct iwl_priv *priv)
320 struct iwl_tt_mgmt *tt = &priv->power_data.tt;
321 struct iwl_tt_restriction *restriction;
323 if (!priv->power_data.adv_tt)
325 restriction = tt->restriction + tt->state;
326 return restriction->is_ht;
328 EXPORT_SYMBOL(iwl_ht_enabled);
330 u8 iwl_tx_ant_restriction(struct iwl_priv *priv)
332 struct iwl_tt_mgmt *tt = &priv->power_data.tt;
333 struct iwl_tt_restriction *restriction;
335 if (!priv->power_data.adv_tt)
337 restriction = tt->restriction + tt->state;
338 return restriction->tx_stream;
340 EXPORT_SYMBOL(iwl_tx_ant_restriction);
342 u8 iwl_rx_ant_restriction(struct iwl_priv *priv)
344 struct iwl_tt_mgmt *tt = &priv->power_data.tt;
345 struct iwl_tt_restriction *restriction;
347 if (!priv->power_data.adv_tt)
349 restriction = tt->restriction + tt->state;
350 return restriction->rx_stream;
352 EXPORT_SYMBOL(iwl_rx_ant_restriction);
354 #define CT_KILL_EXIT_DURATION (5) /* 5 seconds duration */
357 * toggle the bit to wake up uCode and check the temperature
358 * if the temperature is below CT, uCode will stay awake and send card
359 * state notification with CT_KILL bit clear to inform Thermal Throttling
360 * Management to change state. Otherwise, uCode will go back to sleep
361 * without doing anything, driver should continue the 5 seconds timer
362 * to wake up uCode for temperature check until temperature drop below CT
364 static void iwl_tt_check_exit_ct_kill(unsigned long data)
366 struct iwl_priv *priv = (struct iwl_priv *)data;
367 struct iwl_tt_mgmt *tt = &priv->power_data.tt;
370 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
373 if (tt->state == IWL_TI_CT_KILL) {
374 if (priv->power_data.ct_kill_toggle) {
375 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
376 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
377 priv->power_data.ct_kill_toggle = false;
379 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
380 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
381 priv->power_data.ct_kill_toggle = true;
383 iwl_read32(priv, CSR_UCODE_DRV_GP1);
384 spin_lock_irqsave(&priv->reg_lock, flags);
385 if (!iwl_grab_nic_access(priv))
386 iwl_release_nic_access(priv);
387 spin_unlock_irqrestore(&priv->reg_lock, flags);
389 /* Reschedule the ct_kill timer to occur in
390 * CT_KILL_EXIT_DURATION seconds to ensure we get a
392 mod_timer(&priv->power_data.ct_kill_exit_tm, jiffies +
393 CT_KILL_EXIT_DURATION * HZ);
397 static void iwl_perform_ct_kill_task(struct iwl_priv *priv,
401 IWL_DEBUG_POWER(priv, "Stop all queues\n");
402 if (priv->mac80211_registered)
403 ieee80211_stop_queues(priv->hw);
404 IWL_DEBUG_POWER(priv,
405 "Schedule 5 seconds CT_KILL Timer\n");
406 mod_timer(&priv->power_data.ct_kill_exit_tm, jiffies +
407 CT_KILL_EXIT_DURATION * HZ);
409 IWL_DEBUG_POWER(priv, "Wake all queues\n");
410 if (priv->mac80211_registered)
411 ieee80211_wake_queues(priv->hw);
415 #define IWL_MINIMAL_POWER_THRESHOLD (CT_KILL_THRESHOLD_LEGACY)
416 #define IWL_REDUCED_PERFORMANCE_THRESHOLD_2 (100)
417 #define IWL_REDUCED_PERFORMANCE_THRESHOLD_1 (90)
420 * Legacy thermal throttling
421 * 1) Avoid NIC destruction due to high temperatures
422 * Chip will identify dangerously high temperatures that can
423 * harm the device and will power down
424 * 2) Avoid the NIC power down due to high temperature
425 * Throttle early enough to lower the power consumption before
426 * drastic steps are needed
428 static void iwl_legacy_tt_handler(struct iwl_priv *priv, s32 temp)
430 struct iwl_tt_mgmt *tt = &priv->power_data.tt;
431 enum iwl_tt_state old_state;
432 struct iwl_power_mgr *setting = &priv->power_data;
434 #ifdef CONFIG_IWLWIFI_DEBUG
435 if ((tt->tt_previous_temp) &&
436 (temp > tt->tt_previous_temp) &&
437 ((temp - tt->tt_previous_temp) >
438 IWL_TT_INCREASE_MARGIN)) {
439 IWL_DEBUG_POWER(priv,
440 "Temperature increase %d degree Celsius\n",
441 (temp - tt->tt_previous_temp));
444 old_state = tt->state;
446 if (temp >= IWL_MINIMAL_POWER_THRESHOLD)
447 tt->state = IWL_TI_CT_KILL;
448 else if (temp >= IWL_REDUCED_PERFORMANCE_THRESHOLD_2)
449 tt->state = IWL_TI_2;
450 else if (temp >= IWL_REDUCED_PERFORMANCE_THRESHOLD_1)
451 tt->state = IWL_TI_1;
453 tt->state = IWL_TI_0;
455 #ifdef CONFIG_IWLWIFI_DEBUG
456 tt->tt_previous_temp = temp;
458 if (tt->state != old_state) {
459 if (old_state == IWL_TI_0) {
460 tt->sys_power_mode = setting->power_mode;
461 IWL_DEBUG_POWER(priv, "current power mode: %u\n",
462 setting->power_mode);
466 /* when system ready to go back to IWL_TI_0 state
467 * using system power mode instead of TT power mode
468 * revert back to the orginal power mode which was saved
469 * before enter Thermal Throttling state
470 * update priv->power_data.user_power_setting to the
471 * required power mode to make sure
472 * iwl_power_update_mode() will update power correctly.
474 priv->power_data.user_power_setting =
476 tt->tt_power_mode = tt->sys_power_mode;
479 tt->tt_power_mode = IWL_POWER_INDEX_3;
482 tt->tt_power_mode = IWL_POWER_INDEX_4;
485 tt->tt_power_mode = IWL_POWER_INDEX_5;
488 mutex_lock(&priv->mutex);
489 if (iwl_power_update_mode(priv, true)) {
490 /* TT state not updated
491 * try again during next temperature read
493 tt->state = old_state;
494 IWL_ERR(priv, "Cannot update power mode, "
495 "TT state not updated\n");
497 if (tt->state == IWL_TI_CT_KILL)
498 iwl_perform_ct_kill_task(priv, true);
499 else if (old_state == IWL_TI_CT_KILL &&
500 tt->state != IWL_TI_CT_KILL)
501 iwl_perform_ct_kill_task(priv, false);
502 IWL_DEBUG_POWER(priv, "Temperature state changed %u\n",
504 IWL_DEBUG_POWER(priv, "Power Index change to %u\n",
507 mutex_unlock(&priv->mutex);
512 * Advance thermal throttling
513 * 1) Avoid NIC destruction due to high temperatures
514 * Chip will identify dangerously high temperatures that can
515 * harm the device and will power down
516 * 2) Avoid the NIC power down due to high temperature
517 * Throttle early enough to lower the power consumption before
518 * drastic steps are needed
519 * Actions include relaxing the power down sleep thresholds and
520 * decreasing the number of TX streams
521 * 3) Avoid throughput performance impact as much as possible
523 *=============================================================================
524 * Condition Nxt State Condition Nxt State Condition Nxt State
525 *-----------------------------------------------------------------------------
526 * IWL_TI_0 T >= 115 CT_KILL 115>T>=105 TI_1 N/A N/A
527 * IWL_TI_1 T >= 115 CT_KILL 115>T>=110 TI_2 T<=95 TI_0
528 * IWL_TI_2 T >= 115 CT_KILL T<=100 TI_1
529 * IWL_CT_KILL N/A N/A N/A N/A T<=95 TI_0
530 *=============================================================================
532 static void iwl_advance_tt_handler(struct iwl_priv *priv, s32 temp)
534 struct iwl_tt_mgmt *tt = &priv->power_data.tt;
536 bool changed = false;
537 enum iwl_tt_state old_state;
538 struct iwl_tt_trans *transaction;
540 old_state = tt->state;
541 for (i = 0; i < IWL_TI_STATE_MAX - 1; i++) {
542 /* based on the current TT state,
543 * find the curresponding transaction table
544 * each table has (IWL_TI_STATE_MAX - 1) entries
545 * tt->transaction + ((old_state * (IWL_TI_STATE_MAX - 1))
546 * will advance to the correct table.
547 * then based on the current temperature
548 * find the next state need to transaction to
549 * go through all the possible (IWL_TI_STATE_MAX - 1) entries
550 * in the current table to see if transaction is needed
552 transaction = tt->transaction +
553 ((old_state * (IWL_TI_STATE_MAX - 1)) + i);
554 if (temp >= transaction->tt_low &&
555 temp <= transaction->tt_high) {
556 #ifdef CONFIG_IWLWIFI_DEBUG
557 if ((tt->tt_previous_temp) &&
558 (temp > tt->tt_previous_temp) &&
559 ((temp - tt->tt_previous_temp) >
560 IWL_TT_INCREASE_MARGIN)) {
561 IWL_DEBUG_POWER(priv,
562 "Temperature increase %d "
564 (temp - tt->tt_previous_temp));
566 tt->tt_previous_temp = temp;
569 transaction->next_state) {
572 transaction->next_state;
578 struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
579 struct iwl_power_mgr *setting = &priv->power_data;
581 if (tt->state >= IWL_TI_1) {
582 /* if switching from IWL_TI_0 to other TT state
583 * save previous power setting in tt->sys_power_mode */
584 if (old_state == IWL_TI_0)
585 tt->sys_power_mode = setting->power_mode;
586 /* force PI = IWL_POWER_INDEX_5 in the case of TI > 0 */
587 tt->tt_power_mode = IWL_POWER_INDEX_5;
588 if (!iwl_ht_enabled(priv))
590 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
591 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
592 RXON_FLG_HT40_PROT_MSK |
593 RXON_FLG_HT_PROT_MSK);
595 /* check HT capability and set
596 * according to the system HT capability
597 * in case get disabled before */
598 iwl_set_rxon_ht(priv, &priv->current_ht_config);
602 /* restore system power setting */
603 /* the previous power mode was saved in
604 * tt->sys_power_mode when system move into
605 * Thermal Throttling state
606 * set power_data.user_power_setting to the previous
607 * system power mode to make sure power will get
610 priv->power_data.user_power_setting =
612 tt->tt_power_mode = tt->sys_power_mode;
613 /* check HT capability and set
614 * according to the system HT capability
615 * in case get disabled before */
616 iwl_set_rxon_ht(priv, &priv->current_ht_config);
618 mutex_lock(&priv->mutex);
619 if (iwl_power_update_mode(priv, true)) {
620 /* TT state not updated
621 * try again during next temperature read
623 IWL_ERR(priv, "Cannot update power mode, "
624 "TT state not updated\n");
625 tt->state = old_state;
627 IWL_DEBUG_POWER(priv,
628 "Thermal Throttling to new state: %u\n",
630 if (old_state != IWL_TI_CT_KILL &&
631 tt->state == IWL_TI_CT_KILL) {
632 IWL_DEBUG_POWER(priv, "Enter IWL_TI_CT_KILL\n");
633 iwl_perform_ct_kill_task(priv, true);
635 } else if (old_state == IWL_TI_CT_KILL &&
636 tt->state != IWL_TI_CT_KILL) {
637 IWL_DEBUG_POWER(priv, "Exit IWL_TI_CT_KILL\n");
638 iwl_perform_ct_kill_task(priv, false);
641 mutex_unlock(&priv->mutex);
645 /* Card State Notification indicated reach critical temperature
646 * if PSP not enable, no Thermal Throttling function will be performed
647 * just set the GP1 bit to acknowledge the event
648 * otherwise, go into IWL_TI_CT_KILL state
649 * since Card State Notification will not provide any temperature reading
651 * so just pass the CT_KILL temperature to iwl_legacy_tt_handler()
653 * pass CT_KILL_THRESHOLD+1 to make sure move into IWL_TI_CT_KILL state
655 static void iwl_bg_ct_enter(struct work_struct *work)
657 struct iwl_priv *priv = container_of(work, struct iwl_priv, ct_enter);
658 struct iwl_tt_mgmt *tt = &priv->power_data.tt;
660 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
663 if (!iwl_is_ready(priv))
666 if (tt->state != IWL_TI_CT_KILL) {
667 IWL_ERR(priv, "Device reached critical temperature "
668 "- ucode going to sleep!\n");
669 if (!priv->power_data.adv_tt)
670 iwl_legacy_tt_handler(priv,
671 IWL_MINIMAL_POWER_THRESHOLD);
673 iwl_advance_tt_handler(priv,
674 CT_KILL_THRESHOLD + 1);
678 /* Card State Notification indicated out of critical temperature
679 * since Card State Notification will not provide any temperature reading
680 * so pass the IWL_REDUCED_PERFORMANCE_THRESHOLD_2 temperature
681 * to iwl_legacy_tt_handler() to get out of IWL_CT_KILL state
683 static void iwl_bg_ct_exit(struct work_struct *work)
685 struct iwl_priv *priv = container_of(work, struct iwl_priv, ct_exit);
686 struct iwl_tt_mgmt *tt = &priv->power_data.tt;
688 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
691 if (!iwl_is_ready(priv))
694 /* stop ct_kill_exit_tm timer */
695 del_timer_sync(&priv->power_data.ct_kill_exit_tm);
697 if (tt->state == IWL_TI_CT_KILL) {
699 "Device temperature below critical"
701 if (!priv->power_data.adv_tt)
702 iwl_legacy_tt_handler(priv,
703 IWL_REDUCED_PERFORMANCE_THRESHOLD_2);
705 iwl_advance_tt_handler(priv, CT_KILL_EXIT_THRESHOLD);
709 void iwl_tt_enter_ct_kill(struct iwl_priv *priv)
711 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
714 IWL_DEBUG_POWER(priv, "Queueing critical temperature enter.\n");
715 queue_work(priv->workqueue, &priv->ct_enter);
717 EXPORT_SYMBOL(iwl_tt_enter_ct_kill);
719 void iwl_tt_exit_ct_kill(struct iwl_priv *priv)
721 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
724 IWL_DEBUG_POWER(priv, "Queueing critical temperature exit.\n");
725 queue_work(priv->workqueue, &priv->ct_exit);
727 EXPORT_SYMBOL(iwl_tt_exit_ct_kill);
729 static void iwl_bg_tt_work(struct work_struct *work)
731 struct iwl_priv *priv = container_of(work, struct iwl_priv, tt_work);
732 s32 temp = priv->temperature; /* degrees CELSIUS except 4965 */
734 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
737 if ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) == CSR_HW_REV_TYPE_4965)
738 temp = KELVIN_TO_CELSIUS(priv->temperature);
740 if (!priv->power_data.adv_tt)
741 iwl_legacy_tt_handler(priv, temp);
743 iwl_advance_tt_handler(priv, temp);
746 void iwl_tt_handler(struct iwl_priv *priv)
748 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
751 IWL_DEBUG_POWER(priv, "Queueing thermal throttling work.\n");
752 queue_work(priv->workqueue, &priv->tt_work);
754 EXPORT_SYMBOL(iwl_tt_handler);
756 /* Thermal throttling initialization
757 * For advance thermal throttling:
758 * Initialize Thermal Index and temperature threshold table
759 * Initialize thermal throttling restriction table
761 void iwl_tt_initialize(struct iwl_priv *priv)
763 struct iwl_tt_mgmt *tt = &priv->power_data.tt;
764 struct iwl_power_mgr *setting = &priv->power_data;
765 int size = sizeof(struct iwl_tt_trans) * (IWL_TI_STATE_MAX - 1);
766 struct iwl_tt_trans *transaction;
768 IWL_DEBUG_POWER(priv, "Initialize Thermal Throttling \n");
770 memset(tt, 0, sizeof(struct iwl_tt_mgmt));
772 tt->state = IWL_TI_0;
773 tt->sys_power_mode = setting->power_mode;
774 tt->tt_power_mode = tt->sys_power_mode;
775 init_timer(&priv->power_data.ct_kill_exit_tm);
776 priv->power_data.ct_kill_exit_tm.data = (unsigned long)priv;
777 priv->power_data.ct_kill_exit_tm.function = iwl_tt_check_exit_ct_kill;
779 /* setup deferred ct kill work */
780 INIT_WORK(&priv->tt_work, iwl_bg_tt_work);
781 INIT_WORK(&priv->ct_enter, iwl_bg_ct_enter);
782 INIT_WORK(&priv->ct_exit, iwl_bg_ct_exit);
784 switch (priv->hw_rev & CSR_HW_REV_TYPE_MSK) {
785 case CSR_HW_REV_TYPE_6x00:
786 case CSR_HW_REV_TYPE_6x50:
787 IWL_DEBUG_POWER(priv, "Advanced Thermal Throttling\n");
788 tt->restriction = kzalloc(sizeof(struct iwl_tt_restriction) *
789 IWL_TI_STATE_MAX, GFP_KERNEL);
790 tt->transaction = kzalloc(sizeof(struct iwl_tt_trans) *
791 IWL_TI_STATE_MAX * (IWL_TI_STATE_MAX - 1),
793 if (!tt->restriction || !tt->transaction) {
794 IWL_ERR(priv, "Fallback to Legacy Throttling\n");
795 priv->power_data.adv_tt = false;
796 kfree(tt->restriction);
797 tt->restriction = NULL;
798 kfree(tt->transaction);
799 tt->transaction = NULL;
801 transaction = tt->transaction +
802 (IWL_TI_0 * (IWL_TI_STATE_MAX - 1));
803 memcpy(transaction, &tt_range_0[0], size);
804 transaction = tt->transaction +
805 (IWL_TI_1 * (IWL_TI_STATE_MAX - 1));
806 memcpy(transaction, &tt_range_1[0], size);
807 transaction = tt->transaction +
808 (IWL_TI_2 * (IWL_TI_STATE_MAX - 1));
809 memcpy(transaction, &tt_range_2[0], size);
810 transaction = tt->transaction +
811 (IWL_TI_CT_KILL * (IWL_TI_STATE_MAX - 1));
812 memcpy(transaction, &tt_range_3[0], size);
813 size = sizeof(struct iwl_tt_restriction) *
815 memcpy(tt->restriction,
816 &restriction_range[0], size);
817 priv->power_data.adv_tt = true;
821 IWL_DEBUG_POWER(priv, "Legacy Thermal Throttling\n");
822 priv->power_data.adv_tt = false;
826 EXPORT_SYMBOL(iwl_tt_initialize);
828 /* cleanup thermal throttling management related memory and timer */
829 void iwl_tt_exit(struct iwl_priv *priv)
831 struct iwl_tt_mgmt *tt = &priv->power_data.tt;
833 /* stop ct_kill_exit_tm timer if activated */
834 del_timer_sync(&priv->power_data.ct_kill_exit_tm);
835 cancel_work_sync(&priv->tt_work);
836 cancel_work_sync(&priv->ct_enter);
837 cancel_work_sync(&priv->ct_exit);
839 if (priv->power_data.adv_tt) {
840 /* free advance thermal throttling memory */
841 kfree(tt->restriction);
842 tt->restriction = NULL;
843 kfree(tt->transaction);
844 tt->transaction = NULL;
847 EXPORT_SYMBOL(iwl_tt_exit);
849 /* initialize to default */
850 void iwl_power_initialize(struct iwl_priv *priv)
852 iwl_power_init_handle(priv);
853 priv->power_data.user_power_setting = IWL_POWER_INDEX_1;
854 /* default to disabled until mac80211 says otherwise */
855 priv->power_data.power_disabled = 1;
857 EXPORT_SYMBOL(iwl_power_initialize);