Pileus Git - ~andy/linux/blob - drivers/net/wireless/iwlwifi/iwl-power.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2007 - 2009 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/init.h>
  33
  34 #include <net/mac80211.h>
  35
  36 #include "iwl-eeprom.h"
  37 #include "iwl-dev.h"
  38 #include "iwl-core.h"
  39 #include "iwl-io.h"
  40 #include "iwl-commands.h"
  41 #include "iwl-debug.h"
  42 #include "iwl-power.h"
  43
  44 /*
  45  * Setting power level allow the card to go to sleep when not busy.
  46  *
  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.
  50  *
  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.
  54  */
  55
  56 #define IWL_POWER_RANGE_0_MAX  (2)
  57 #define IWL_POWER_RANGE_1_MAX  (10)
  58
  59
  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), \
  65                                      cpu_to_le32(X1), \
  66                                      cpu_to_le32(X2), \
  67                                      cpu_to_le32(X3), \
  68                                      cpu_to_le32(X4)}
  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}
  78 };
  79
  80
  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}
  89 };
  90
  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}
  99 };
 100
 101
 102 /* set card power command */
 103 static int iwl_set_power(struct iwl_priv *priv, void *cmd)
 104 {
 105         return iwl_send_cmd_pdu(priv, POWER_TABLE_CMD,
 106                                 sizeof(struct iwl_powertable_cmd), cmd);
 107 }
 108
 109 /* initialize to default */
 110 static void iwl_power_init_handle(struct iwl_priv *priv)
 111 {
 112         struct iwl_power_mgr *pow_data;
 113         int size = sizeof(struct iwl_power_vec_entry) * IWL_POWER_NUM;
 114         struct iwl_powertable_cmd *cmd;
 115         int i;
 116         u16 lctl;
 117
 118         IWL_DEBUG_POWER(priv, "Initialize power \n");
 119
 120         pow_data = &priv->power_data;
 121
 122         memset(pow_data, 0, sizeof(*pow_data));
 123
 124         memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
 125         memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
 126         memcpy(&pow_data->pwr_range_2[0], &range_2[0], size);
 127
 128         lctl = iwl_pcie_link_ctl(priv);
 129
 130         IWL_DEBUG_POWER(priv, "adjust power command flags\n");
 131
 132         for (i = 0; i < IWL_POWER_NUM; i++) {
 133                 cmd = &pow_data->pwr_range_0[i].cmd;
 134
 135                 if (lctl & PCI_CFG_LINK_CTRL_VAL_L0S_EN)
 136                         cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
 137                 else
 138                         cmd->flags |= IWL_POWER_PCI_PM_MSK;
 139         }
 140 }
 141
 142 /* adjust power command according to DTIM period and power level*/
 143 static int iwl_update_power_cmd(struct iwl_priv *priv,
 144                                 struct iwl_powertable_cmd *cmd, u16 mode)
 145 {
 146         struct iwl_power_vec_entry *range;
 147         struct iwl_power_mgr *pow_data;
 148         int i;
 149         u32 max_sleep = 0;
 150         u8 period;
 151         bool skip;
 152
 153         if (mode > IWL_POWER_INDEX_5) {
 154                 IWL_DEBUG_POWER(priv, "Error invalid power mode \n");
 155                 return -EINVAL;
 156         }
 157
 158         pow_data = &priv->power_data;
 159
 160         if (pow_data->dtim_period <= IWL_POWER_RANGE_0_MAX)
 161                 range = &pow_data->pwr_range_0[0];
 162         else if (pow_data->dtim_period <= IWL_POWER_RANGE_1_MAX)
 163                 range = &pow_data->pwr_range_1[0];
 164         else
 165                 range = &pow_data->pwr_range_2[0];
 166
 167         period = pow_data->dtim_period;
 168         memcpy(cmd, &range[mode].cmd, sizeof(struct iwl_powertable_cmd));
 169
 170         if (period == 0) {
 171                 period = 1;
 172                 skip = false;
 173         } else {
 174                 skip = !!range[mode].no_dtim;
 175         }
 176
 177         if (skip) {
 178                 __le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
 179                 max_sleep = le32_to_cpu(slp_itrvl);
 180                 if (max_sleep == 0xFF)
 181                         max_sleep = period * (skip + 1);
 182                 else if (max_sleep >  period)
 183                         max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
 184                 cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
 185         } else {
 186                 max_sleep = period;
 187                 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
 188         }
 189
 190         for (i = 0; i < IWL_POWER_VEC_SIZE; i++)
 191                 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
 192                         cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
 193
 194         IWL_DEBUG_POWER(priv, "Flags value = 0x%08X\n", cmd->flags);
 195         IWL_DEBUG_POWER(priv, "Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
 196         IWL_DEBUG_POWER(priv, "Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
 197         IWL_DEBUG_POWER(priv, "Sleep interval vector = { %d , %d , %d , %d , %d }\n",
 198                         le32_to_cpu(cmd->sleep_interval[0]),
 199                         le32_to_cpu(cmd->sleep_interval[1]),
 200                         le32_to_cpu(cmd->sleep_interval[2]),
 201                         le32_to_cpu(cmd->sleep_interval[3]),
 202                         le32_to_cpu(cmd->sleep_interval[4]));
 203
 204         return 0;
 205 }
 206
 207
 208 /*
 209  * compute the final power mode index
 210  */
 211 int iwl_power_update_mode(struct iwl_priv *priv, bool force)
 212 {
 213         struct iwl_power_mgr *setting = &(priv->power_data);
 214         int ret = 0;
 215         struct iwl_tt_mgmt *tt = &priv->power_data.tt;
 216         u16 uninitialized_var(final_mode);
 217         bool update_chains;
 218
 219         /* Don't update the RX chain when chain noise calibration is running */
 220         update_chains = priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE ||
 221                         priv->chain_noise_data.state == IWL_CHAIN_NOISE_ALIVE;
 222
 223         final_mode = priv->power_data.user_power_setting;
 224
 225         if (setting->power_disabled)
 226                 final_mode = IWL_POWER_MODE_CAM;
 227
 228         if (tt->state >= IWL_TI_1) {
 229                 /* TT power setting overwrite user & system power setting */
 230                 final_mode = tt->tt_power_mode;
 231         }
 232         if (iwl_is_ready_rf(priv) &&
 233             ((setting->power_mode != final_mode) || force)) {
 234                 struct iwl_powertable_cmd cmd;
 235
 236                 if (final_mode != IWL_POWER_MODE_CAM)
 237                         set_bit(STATUS_POWER_PMI, &priv->status);
 238
 239                 iwl_update_power_cmd(priv, &cmd, final_mode);
 240                 cmd.keep_alive_beacons = 0;
 241
 242                 if (final_mode == IWL_POWER_INDEX_5)
 243                         cmd.flags |= IWL_POWER_FAST_PD;
 244
 245                 ret = iwl_set_power(priv, &cmd);
 246
 247                 if (final_mode == IWL_POWER_MODE_CAM)
 248                         clear_bit(STATUS_POWER_PMI, &priv->status);
 249
 250                 if (priv->cfg->ops->lib->update_chain_flags && update_chains)
 251                         priv->cfg->ops->lib->update_chain_flags(priv);
 252                 else
 253                         IWL_DEBUG_POWER(priv, "Cannot update the power, chain noise "
 254                                         "calibration running: %d\n",
 255                                         priv->chain_noise_data.state);
 256                 if (!ret)
 257                         setting->power_mode = final_mode;
 258         }
 259
 260         return ret;
 261 }
 262 EXPORT_SYMBOL(iwl_power_update_mode);
 263
 264 /* set user_power_setting */
 265 int iwl_power_set_user_mode(struct iwl_priv *priv, u16 mode)
 266 {
 267         if (mode >= IWL_POWER_NUM)
 268                 return -EINVAL;
 269
 270         priv->power_data.user_power_setting = mode;
 271
 272         return iwl_power_update_mode(priv, 0);
 273 }
 274 EXPORT_SYMBOL(iwl_power_set_user_mode);
 275
 276 #define CT_KILL_EXIT_DURATION (5)       /* 5 seconds duration */
 277
 278 /*
 279  * toggle the bit to wake up uCode and check the temperature
 280  * if the temperature is below CT, uCode will stay awake and send card
 281  * state notification with CT_KILL bit clear to inform Thermal Throttling
 282  * Management to change state. Otherwise, uCode will go back to sleep
 283  * without doing anything, driver should continue the 5 seconds timer
 284  * to wake up uCode for temperature check until temperature drop below CT
 285  */
 286 static void iwl_tt_check_exit_ct_kill(unsigned long data)
 287 {
 288         struct iwl_priv *priv = (struct iwl_priv *)data;
 289         struct iwl_tt_mgmt *tt = &priv->power_data.tt;
 290         unsigned long flags;
 291
 292         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 293                 return;
 294
 295         if (tt->state == IWL_TI_CT_KILL) {
 296                 if (priv->power_data.ct_kill_toggle) {
 297                         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
 298                                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
 299                         priv->power_data.ct_kill_toggle = false;
 300                 } else {
 301                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 302                                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
 303                         priv->power_data.ct_kill_toggle = true;
 304                 }
 305                 iwl_read32(priv, CSR_UCODE_DRV_GP1);
 306                 spin_lock_irqsave(&priv->reg_lock, flags);
 307                 if (!iwl_grab_nic_access(priv))
 308                         iwl_release_nic_access(priv);
 309                 spin_unlock_irqrestore(&priv->reg_lock, flags);
 310
 311                 /* Reschedule the ct_kill timer to occur in
 312                  * CT_KILL_EXIT_DURATION seconds to ensure we get a
 313                  * thermal update */
 314                 mod_timer(&priv->power_data.ct_kill_exit_tm, jiffies +
 315                           CT_KILL_EXIT_DURATION * HZ);
 316         }
 317 }
 318
 319 static void iwl_perform_ct_kill_task(struct iwl_priv *priv,
 320                            bool stop)
 321 {
 322         if (stop) {
 323                 IWL_DEBUG_POWER(priv, "Stop all queues\n");
 324                 if (priv->mac80211_registered)
 325                         ieee80211_stop_queues(priv->hw);
 326                 IWL_DEBUG_POWER(priv,
 327                                 "Schedule 5 seconds CT_KILL Timer\n");
 328                 mod_timer(&priv->power_data.ct_kill_exit_tm, jiffies +
 329                           CT_KILL_EXIT_DURATION * HZ);
 330         } else {
 331                 IWL_DEBUG_POWER(priv, "Wake all queues\n");
 332                 if (priv->mac80211_registered)
 333                         ieee80211_wake_queues(priv->hw);
 334         }
 335 }
 336
 337 #define IWL_MINIMAL_POWER_THRESHOLD             (CT_KILL_THRESHOLD_LEGACY)
 338 #define IWL_REDUCED_PERFORMANCE_THRESHOLD_2     (100)
 339 #define IWL_REDUCED_PERFORMANCE_THRESHOLD_1     (90)
 340
 341 /*
 342  * Legacy thermal throttling
 343  * 1) Avoid NIC destruction due to high temperatures
 344  *      Chip will identify dangerously high temperatures that can
 345  *      harm the device and will power down
 346  * 2) Avoid the NIC power down due to high temperature
 347  *      Throttle early enough to lower the power consumption before
 348  *      drastic steps are needed
 349  */
 350 static void iwl_legacy_tt_handler(struct iwl_priv *priv, s32 temp)
 351 {
 352         struct iwl_tt_mgmt *tt = &priv->power_data.tt;
 353         enum iwl_tt_state new_state;
 354         struct iwl_power_mgr *setting = &priv->power_data;
 355
 356 #ifdef CONFIG_IWLWIFI_DEBUG
 357         if ((tt->tt_previous_temp) &&
 358             (temp > tt->tt_previous_temp) &&
 359             ((temp - tt->tt_previous_temp) >
 360             IWL_TT_INCREASE_MARGIN)) {
 361                 IWL_DEBUG_POWER(priv,
 362                         "Temperature increase %d degree Celsius\n",
 363                         (temp - tt->tt_previous_temp));
 364         }
 365 #endif
 366         /* in Celsius */
 367         if (temp >= IWL_MINIMAL_POWER_THRESHOLD)
 368                 new_state = IWL_TI_CT_KILL;
 369         else if (temp >= IWL_REDUCED_PERFORMANCE_THRESHOLD_2)
 370                 new_state = IWL_TI_2;
 371         else if (temp >= IWL_REDUCED_PERFORMANCE_THRESHOLD_1)
 372                 new_state = IWL_TI_1;
 373         else
 374                 new_state = IWL_TI_0;
 375
 376 #ifdef CONFIG_IWLWIFI_DEBUG
 377         tt->tt_previous_temp = temp;
 378 #endif
 379         if (tt->state != new_state) {
 380                 if (tt->state == IWL_TI_0) {
 381                         tt->sys_power_mode = setting->power_mode;
 382                         IWL_DEBUG_POWER(priv, "current power mode: %u\n",
 383                                 setting->power_mode);
 384                 }
 385                 switch (new_state) {
 386                 case IWL_TI_0:
 387                         /* when system ready to go back to IWL_TI_0 state
 388                          * using system power mode instead of TT power mode
 389                          * revert back to the orginal power mode which was saved
 390                          * before enter Thermal Throttling state
 391                          * update priv->power_data.user_power_setting to the
 392                          * required power mode to make sure
 393                          * iwl_power_update_mode() will update power correctly.
 394                          */
 395                         priv->power_data.user_power_setting =
 396                                 tt->sys_power_mode;
 397                         tt->tt_power_mode = tt->sys_power_mode;
 398                         break;
 399                 case IWL_TI_1:
 400                         tt->tt_power_mode = IWL_POWER_INDEX_3;
 401                         break;
 402                 case IWL_TI_2:
 403                         tt->tt_power_mode = IWL_POWER_INDEX_4;
 404                         break;
 405                 default:
 406                         tt->tt_power_mode = IWL_POWER_INDEX_5;
 407                         break;
 408                 }
 409                 if (iwl_power_update_mode(priv, true)) {
 410                         /* TT state not updated
 411                          * try again during next temperature read
 412                          */
 413                         IWL_ERR(priv, "Cannot update power mode, "
 414                                         "TT state not updated\n");
 415                 } else {
 416                         if (new_state == IWL_TI_CT_KILL)
 417                                 iwl_perform_ct_kill_task(priv, true);
 418                         else if (tt->state == IWL_TI_CT_KILL &&
 419                                  new_state != IWL_TI_CT_KILL)
 420                                 iwl_perform_ct_kill_task(priv, false);
 421                         tt->state = new_state;
 422                         IWL_DEBUG_POWER(priv, "Temperature state changed %u\n",
 423                                         tt->state);
 424                         IWL_DEBUG_POWER(priv, "Power Index change to %u\n",
 425                                         tt->tt_power_mode);
 426                 }
 427         }
 428 }
 429
 430 /* Card State Notification indicated reach critical temperature
 431  * if PSP not enable, no Thermal Throttling function will be performed
 432  * just set the GP1 bit to acknowledge the event
 433  * otherwise, go into IWL_TI_CT_KILL state
 434  * since Card State Notification will not provide any temperature reading
 435  * so just pass the CT_KILL temperature to iwl_legacy_tt_handler()
 436  */
 437 void iwl_tt_enter_ct_kill(struct iwl_priv *priv)
 438 {
 439         struct iwl_tt_mgmt *tt = &priv->power_data.tt;
 440
 441         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 442                 return;
 443
 444         if (tt->state != IWL_TI_CT_KILL) {
 445                 IWL_ERR(priv, "Device reached critical temperature "
 446                               "- ucode going to sleep!\n");
 447                 iwl_legacy_tt_handler(priv, IWL_MINIMAL_POWER_THRESHOLD);
 448         }
 449 }
 450 EXPORT_SYMBOL(iwl_tt_enter_ct_kill);
 451
 452 /* Card State Notification indicated out of critical temperature
 453  * since Card State Notification will not provide any temperature reading
 454  * so pass the IWL_REDUCED_PERFORMANCE_THRESHOLD_2 temperature
 455  * to iwl_legacy_tt_handler() to get out of IWL_CT_KILL state
 456  */
 457 void iwl_tt_exit_ct_kill(struct iwl_priv *priv)
 458 {
 459         struct iwl_tt_mgmt *tt = &priv->power_data.tt;
 460
 461         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 462                 return;
 463
 464         /* stop ct_kill_exit_tm timer */
 465         del_timer_sync(&priv->power_data.ct_kill_exit_tm);
 466
 467         if (tt->state == IWL_TI_CT_KILL) {
 468                 IWL_ERR(priv,
 469                         "Device temperature below critical"
 470                         "- ucode awake!\n");
 471                 iwl_legacy_tt_handler(priv,
 472                         IWL_REDUCED_PERFORMANCE_THRESHOLD_2);
 473         }
 474 }
 475 EXPORT_SYMBOL(iwl_tt_exit_ct_kill);
 476
 477 void iwl_tt_handler(struct iwl_priv *priv)
 478 {
 479         s32 temp = priv->temperature; /* degrees CELSIUS except 4965 */
 480
 481         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 482                 return;
 483
 484         if ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) == CSR_HW_REV_TYPE_4965)
 485                 temp = KELVIN_TO_CELSIUS(priv->temperature);
 486
 487         iwl_legacy_tt_handler(priv, temp);
 488 }
 489 EXPORT_SYMBOL(iwl_tt_handler);
 490
 491 /* Thermal throttling initialization
 492  */
 493 void iwl_tt_initialize(struct iwl_priv *priv)
 494 {
 495         struct iwl_tt_mgmt *tt = &priv->power_data.tt;
 496         struct iwl_power_mgr *setting = &priv->power_data;
 497
 498         IWL_DEBUG_POWER(priv, "Initialize Thermal Throttling \n");
 499
 500         memset(tt, 0, sizeof(struct iwl_tt_mgmt));
 501
 502         tt->state = IWL_TI_0;
 503         tt->sys_power_mode = setting->power_mode;
 504         tt->tt_power_mode = tt->sys_power_mode;
 505         init_timer(&priv->power_data.ct_kill_exit_tm);
 506         priv->power_data.ct_kill_exit_tm.data = (unsigned long)priv;
 507         priv->power_data.ct_kill_exit_tm.function = iwl_tt_check_exit_ct_kill;
 508 }
 509 EXPORT_SYMBOL(iwl_tt_initialize);
 510
 511 /* cleanup thermal throttling management related memory and timer */
 512 void iwl_tt_exit(struct iwl_priv *priv)
 513 {
 514         /* stop ct_kill_exit_tm timer if activated */
 515         del_timer_sync(&priv->power_data.ct_kill_exit_tm);
 516 }
 517 EXPORT_SYMBOL(iwl_tt_exit);
 518
 519 /* initialize to default */
 520 void iwl_power_initialize(struct iwl_priv *priv)
 521 {
 522         iwl_power_init_handle(priv);
 523         priv->power_data.user_power_setting = IWL_POWER_INDEX_1;
 524         /* default to disabled until mac80211 says otherwise */
 525         priv->power_data.power_disabled = 1;
 526 }
 527 EXPORT_SYMBOL(iwl_power_initialize);