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iwlwifi: display correct critical temperature infomation
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / net / wireless / iwlwifi / iwl-power.c
CommitLineData
5da4b55f
MA		 1/******************************************************************************
2 *
01f8162a 3 * Copyright(c) 2007 - 2009 Intel Corporation. All rights reserved.
5da4b55f
MA		 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:
759ef89f 25 * Intel Linux Wireless <ilw@linux.intel.com>
5da4b55f
MA		 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>
5da4b55f
MA		 32#include <linux/init.h>
33
34#include <net/mac80211.h>
35
36#include "iwl-eeprom.h"
3e0d4cb1 37#include "iwl-dev.h"
5da4b55f 38#include "iwl-core.h"
39b73fb1 39#include "iwl-io.h"
5a36ba0e 40#include "iwl-commands.h"
5da4b55f
MA		 41#include "iwl-debug.h"
42#include "iwl-power.h"
5da4b55f
MA		 43
44/*
7af2c460 45 * Setting power level allow the card to go to sleep when not busy.
5da4b55f 46 *
7af2c460
JB		 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.
5da4b55f 50 *
7af2c460
JB		 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.
5da4b55f
MA		 54 */
55
5da4b55f
MA		 56#define IWL_POWER_RANGE_0_MAX (2)
57#define IWL_POWER_RANGE_1_MAX (10)
58
59
7af2c460
JB		 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)}
5da4b55f 69/* default power management (not Tx power) table values */
7af2c460
JB		 70/* for DTIM period 0 through IWL_POWER_RANGE_0_MAX */
71static const struct iwl_power_vec_entry range_0[IWL_POWER_NUM] = {
5da4b55f
MA		 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
7af2c460
JB		 81/* for DTIM period IWL_POWER_RANGE_0_MAX + 1 through IWL_POWER_RANGE_1_MAX */
82static const struct iwl_power_vec_entry range_1[IWL_POWER_NUM] = {
5da4b55f
MA		 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
7af2c460
JB		 91/* for DTIM period > IWL_POWER_RANGE_1_MAX */
92static const struct iwl_power_vec_entry range_2[IWL_POWER_NUM] = {
5da4b55f
MA		 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
46f9381a
WYG		 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 *=============================================================================
111 */
112static 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}
116};
117static 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}
121};
122static 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}
126};
127static 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}
131};
132
133/* Advance Thermal Throttling default restriction table */
134static const struct iwl_tt_restriction restriction_range[IWL_TI_STATE_MAX] = {
3ad3b92a
JB		 135 {IWL_ANT_OK_MULTI, IWL_ANT_OK_MULTI, true },
136 {IWL_ANT_OK_SINGLE, IWL_ANT_OK_MULTI, true },
137 {IWL_ANT_OK_SINGLE, IWL_ANT_OK_SINGLE, false },
138 {IWL_ANT_OK_NONE, IWL_ANT_OK_NONE, false }
46f9381a 139};
d25aabb0 140
ca579617
MA		 141/* set card power command */
142static int iwl_set_power(struct iwl_priv *priv, void *cmd)
143{
f0f74a0e
JB		 144 return iwl_send_cmd_pdu(priv, POWER_TABLE_CMD,
145 sizeof(struct iwl_powertable_cmd), cmd);
ca579617 146}
5da4b55f
MA		 147
148/* initialize to default */
5cd19c5f 149static void iwl_power_init_handle(struct iwl_priv *priv)
5da4b55f 150{
5da4b55f 151 struct iwl_power_mgr *pow_data;
7af2c460 152 int size = sizeof(struct iwl_power_vec_entry) * IWL_POWER_NUM;
e7b63581
TW		 153 struct iwl_powertable_cmd *cmd;
154 int i;
3fdb68de 155 u16 lctl;
5da4b55f 156
e1623446 157 IWL_DEBUG_POWER(priv, "Initialize power \n");
5da4b55f 158
5cd19c5f 159 pow_data = &priv->power_data;
5da4b55f
MA		 160
161 memset(pow_data, 0, sizeof(*pow_data));
162
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);
166
3fdb68de 167 lctl = iwl_pcie_link_ctl(priv);
5da4b55f 168
e1623446 169 IWL_DEBUG_POWER(priv, "adjust power command flags\n");
5da4b55f 170
7af2c460 171 for (i = 0; i < IWL_POWER_NUM; i++) {
e7b63581 172 cmd = &pow_data->pwr_range_0[i].cmd;
5da4b55f 173
3fdb68de 174 if (lctl & PCI_CFG_LINK_CTRL_VAL_L0S_EN)
e7b63581
TW		 175 cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
176 else
177 cmd->flags |= IWL_POWER_PCI_PM_MSK;
5da4b55f 178 }
5da4b55f
MA		 179}
180
a96a27f9 181/* adjust power command according to DTIM period and power level*/
5cd19c5f
WT		 182static int iwl_update_power_cmd(struct iwl_priv *priv,
183 struct iwl_powertable_cmd *cmd, u16 mode)
5da4b55f 184{
5da4b55f 185 struct iwl_power_vec_entry *range;
5da4b55f 186 struct iwl_power_mgr *pow_data;
5cd19c5f
WT		 187 int i;
188 u32 max_sleep = 0;
189 u8 period;
190 bool skip;
5da4b55f
MA		 191
192 if (mode > IWL_POWER_INDEX_5) {
e1623446 193 IWL_DEBUG_POWER(priv, "Error invalid power mode \n");
5cd19c5f 194 return -EINVAL;
5da4b55f 195 }
5cd19c5f
WT		 196
197 pow_data = &priv->power_data;
5da4b55f
MA		 198
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];
203 else
204 range = &pow_data->pwr_range_2[0];
205
206 period = pow_data->dtim_period;
ca579617 207 memcpy(cmd, &range[mode].cmd, sizeof(struct iwl_powertable_cmd));
5da4b55f
MA		 208
209 if (period == 0) {
210 period = 1;
5cd19c5f 211 skip = false;
5da4b55f 212 } else {
5cd19c5f
WT		 213 skip = !!range[mode].no_dtim;
214 }
215
216 if (skip) {
5da4b55f
MA		 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;
5cd19c5f
WT		 224 } else {
225 max_sleep = period;
226 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
5da4b55f
MA		 227 }
228
5cd19c5f 229 for (i = 0; i < IWL_POWER_VEC_SIZE; i++)
5da4b55f
MA		 230 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
231 cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
5da4b55f 232
e1623446
TW		 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",
5da4b55f
MA		 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]));
242
5cd19c5f 243 return 0;
5da4b55f
MA		 244}
245
246
247/*
a33c2f47 248 * compute the final power mode index
5da4b55f 249 */
04816448 250int iwl_power_update_mode(struct iwl_priv *priv, bool force)
5da4b55f
MA		 251{
252 struct iwl_power_mgr *setting = &(priv->power_data);
253 int ret = 0;
3ad3b92a 254 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
5da4b55f 255 u16 uninitialized_var(final_mode);
a71c8f62 256 bool update_chains;
5da4b55f 257
04816448 258 /* Don't update the RX chain when chain noise calibration is running */
a71c8f62
WT		 259 update_chains = priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE ||
260 priv->chain_noise_data.state == IWL_CHAIN_NOISE_ALIVE;
04816448 261
7af2c460 262 final_mode = priv->power_data.user_power_setting;
5da4b55f 263
7af2c460 264 if (setting->power_disabled)
5da4b55f
MA		 265 final_mode = IWL_POWER_MODE_CAM;
266
39b73fb1
WYG		 267 if (tt->state >= IWL_TI_1) {
268 /* TT power setting overwrite user & system power setting */
269 final_mode = tt->tt_power_mode;
270 }
7af2c460 271 if (iwl_is_ready_rf(priv) &&
04816448 272 ((setting->power_mode != final_mode) || force)) {
ca579617 273 struct iwl_powertable_cmd cmd;
5da4b55f
MA		 274
275 if (final_mode != IWL_POWER_MODE_CAM)
276 set_bit(STATUS_POWER_PMI, &priv->status);
277
5cd19c5f 278 iwl_update_power_cmd(priv, &cmd, final_mode);
5da4b55f
MA		 279 cmd.keep_alive_beacons = 0;
280
281 if (final_mode == IWL_POWER_INDEX_5)
282 cmd.flags |= IWL_POWER_FAST_PD;
283
ca579617 284 ret = iwl_set_power(priv, &cmd);
3a780d25
WYG		 285 if (!ret) {
286 if (final_mode == IWL_POWER_MODE_CAM)
287 clear_bit(STATUS_POWER_PMI, &priv->status);
288
289 if (priv->cfg->ops->lib->update_chain_flags &&
290 update_chains)
291 priv->cfg->ops->lib->update_chain_flags(priv);
292 else
293 IWL_DEBUG_POWER(priv,
294 "Cannot update the power, chain noise "
a71c8f62
WT		 295 "calibration running: %d\n",
296 priv->chain_noise_data.state);
5da4b55f 297 setting->power_mode = final_mode;
3a780d25
WYG		 298 } else
299 IWL_ERR(priv, "set power fail, ret = %d", ret);
5da4b55f
MA		 300 }
301
302 return ret;
303}
304EXPORT_SYMBOL(iwl_power_update_mode);
305
5da4b55f
MA		 306/* set user_power_setting */
307int iwl_power_set_user_mode(struct iwl_priv *priv, u16 mode)
308{
7af2c460 309 if (mode >= IWL_POWER_NUM)
5da4b55f
MA		 310 return -EINVAL;
311
312 priv->power_data.user_power_setting = mode;
313
04816448 314 return iwl_power_update_mode(priv, 0);
5da4b55f
MA		 315}
316EXPORT_SYMBOL(iwl_power_set_user_mode);
317
46f9381a
WYG		 318bool iwl_ht_enabled(struct iwl_priv *priv)
319{
3ad3b92a 320 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
46f9381a
WYG		 321 struct iwl_tt_restriction *restriction;
322
3ad3b92a 323 if (!priv->thermal_throttle.advanced_tt)
46f9381a
WYG		 324 return true;
325 restriction = tt->restriction + tt->state;
326 return restriction->is_ht;
327}
328EXPORT_SYMBOL(iwl_ht_enabled);
329
3ad3b92a 330enum iwl_antenna_ok iwl_tx_ant_restriction(struct iwl_priv *priv)
46f9381a 331{
3ad3b92a 332 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
46f9381a
WYG		 333 struct iwl_tt_restriction *restriction;
334
3ad3b92a
JB		 335 if (!priv->thermal_throttle.advanced_tt)
336 return IWL_ANT_OK_MULTI;
46f9381a
WYG		 337 restriction = tt->restriction + tt->state;
338 return restriction->tx_stream;
339}
340EXPORT_SYMBOL(iwl_tx_ant_restriction);
341
3ad3b92a 342enum iwl_antenna_ok iwl_rx_ant_restriction(struct iwl_priv *priv)
46f9381a 343{
3ad3b92a 344 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
46f9381a
WYG		 345 struct iwl_tt_restriction *restriction;
346
3ad3b92a
JB		 347 if (!priv->thermal_throttle.advanced_tt)
348 return IWL_ANT_OK_MULTI;
46f9381a
WYG		 349 restriction = tt->restriction + tt->state;
350 return restriction->rx_stream;
351}
352EXPORT_SYMBOL(iwl_rx_ant_restriction);
353
39b73fb1
WYG		 354#define CT_KILL_EXIT_DURATION (5) /* 5 seconds duration */
355
356/*
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
363 */
364static void iwl_tt_check_exit_ct_kill(unsigned long data)
365{
366 struct iwl_priv *priv = (struct iwl_priv *)data;
3ad3b92a 367 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
39b73fb1
WYG		 368 unsigned long flags;
369
370 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
371 return;
372
373 if (tt->state == IWL_TI_CT_KILL) {
3ad3b92a 374 if (priv->thermal_throttle.ct_kill_toggle) {
39b73fb1
WYG		 375 iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
376 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
3ad3b92a 377 priv->thermal_throttle.ct_kill_toggle = false;
39b73fb1
WYG		 378 } else {
379 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
380 CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
3ad3b92a 381 priv->thermal_throttle.ct_kill_toggle = true;
39b73fb1
WYG		 382 }
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);
388
389 /* Reschedule the ct_kill timer to occur in
390 * CT_KILL_EXIT_DURATION seconds to ensure we get a
391 * thermal update */
3ad3b92a 392 mod_timer(&priv->thermal_throttle.ct_kill_exit_tm, jiffies +
39b73fb1
WYG		 393 CT_KILL_EXIT_DURATION * HZ);
394 }
395}
396
397static void iwl_perform_ct_kill_task(struct iwl_priv *priv,
398 bool stop)
399{
400 if (stop) {
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");
3ad3b92a 406 mod_timer(&priv->thermal_throttle.ct_kill_exit_tm, jiffies +
39b73fb1
WYG		 407 CT_KILL_EXIT_DURATION * HZ);
408 } else {
409 IWL_DEBUG_POWER(priv, "Wake all queues\n");
410 if (priv->mac80211_registered)
411 ieee80211_wake_queues(priv->hw);
412 }
413}
414
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)
418
419/*
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
427 */
428static void iwl_legacy_tt_handler(struct iwl_priv *priv, s32 temp)
429{
3ad3b92a 430 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
ee9f2989 431 enum iwl_tt_state old_state;
39b73fb1
WYG		 432 struct iwl_power_mgr *setting = &priv->power_data;
433
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));
442 }
443#endif
ee9f2989 444 old_state = tt->state;
39b73fb1
WYG		 445 /* in Celsius */
446 if (temp >= IWL_MINIMAL_POWER_THRESHOLD)
ee9f2989 447 tt->state = IWL_TI_CT_KILL;
39b73fb1 448 else if (temp >= IWL_REDUCED_PERFORMANCE_THRESHOLD_2)
ee9f2989 449 tt->state = IWL_TI_2;
39b73fb1 450 else if (temp >= IWL_REDUCED_PERFORMANCE_THRESHOLD_1)
ee9f2989 451 tt->state = IWL_TI_1;
39b73fb1 452 else
ee9f2989 453 tt->state = IWL_TI_0;
39b73fb1
WYG		 454
455#ifdef CONFIG_IWLWIFI_DEBUG
456 tt->tt_previous_temp = temp;
457#endif
ee9f2989
WYG		 458 if (tt->state != old_state) {
459 if (old_state == IWL_TI_0) {
39b73fb1
WYG		 460 tt->sys_power_mode = setting->power_mode;
461 IWL_DEBUG_POWER(priv, "current power mode: %u\n",
462 setting->power_mode);
463 }
ee9f2989 464 switch (tt->state) {
39b73fb1
WYG		 465 case IWL_TI_0:
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.
473 */
474 priv->power_data.user_power_setting =
475 tt->sys_power_mode;
476 tt->tt_power_mode = tt->sys_power_mode;
477 break;
478 case IWL_TI_1:
479 tt->tt_power_mode = IWL_POWER_INDEX_3;
480 break;
481 case IWL_TI_2:
482 tt->tt_power_mode = IWL_POWER_INDEX_4;
483 break;
484 default:
485 tt->tt_power_mode = IWL_POWER_INDEX_5;
486 break;
487 }
a28027cd 488 mutex_lock(&priv->mutex);
39b73fb1
WYG		 489 if (iwl_power_update_mode(priv, true)) {
490 /* TT state not updated
491 * try again during next temperature read
492 */
ee9f2989 493 tt->state = old_state;
39b73fb1
WYG		 494 IWL_ERR(priv, "Cannot update power mode, "
495 "TT state not updated\n");
496 } else {
ee9f2989 497 if (tt->state == IWL_TI_CT_KILL)
39b73fb1 498 iwl_perform_ct_kill_task(priv, true);
ee9f2989
WYG		 499 else if (old_state == IWL_TI_CT_KILL &&
500 tt->state != IWL_TI_CT_KILL)
39b73fb1 501 iwl_perform_ct_kill_task(priv, false);
39b73fb1
WYG		 502 IWL_DEBUG_POWER(priv, "Temperature state changed %u\n",
503 tt->state);
504 IWL_DEBUG_POWER(priv, "Power Index change to %u\n",
505 tt->tt_power_mode);
506 }
a28027cd 507 mutex_unlock(&priv->mutex);
39b73fb1
WYG		 508 }
509}
510
46f9381a
WYG		 511/*
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
522 *
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 *=============================================================================
531 */
532static void iwl_advance_tt_handler(struct iwl_priv *priv, s32 temp)
533{
3ad3b92a 534 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
46f9381a
WYG		 535 int i;
536 bool changed = false;
537 enum iwl_tt_state old_state;
538 struct iwl_tt_trans *transaction;
539
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
551 */
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 "
563 "degree Celsius\n",
564 (temp - tt->tt_previous_temp));
565 }
566 tt->tt_previous_temp = temp;
567#endif
568 if (old_state !=
569 transaction->next_state) {
570 changed = true;
571 tt->state =
572 transaction->next_state;
573 }
574 break;
575 }
576 }
577 if (changed) {
578 struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
579 struct iwl_power_mgr *setting = &priv->power_data;
580
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))
589 /* disable HT */
590 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
591 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
7aafef1c 592 RXON_FLG_HT40_PROT_MSK |
46f9381a
WYG		 593 RXON_FLG_HT_PROT_MSK);
594 else {
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);
599 }
600
601 } else {
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
608 * updated correctly
609 */
610 priv->power_data.user_power_setting =
611 tt->sys_power_mode;
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);
617 }
a28027cd 618 mutex_lock(&priv->mutex);
46f9381a
WYG		 619 if (iwl_power_update_mode(priv, true)) {
620 /* TT state not updated
621 * try again during next temperature read
622 */
623 IWL_ERR(priv, "Cannot update power mode, "
624 "TT state not updated\n");
625 tt->state = old_state;
626 } else {
627 IWL_DEBUG_POWER(priv,
628 "Thermal Throttling to new state: %u\n",
629 tt->state);
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);
634
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);
639 }
640 }
a28027cd 641 mutex_unlock(&priv->mutex);
46f9381a
WYG		 642 }
643}
644
39b73fb1
WYG		 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
46f9381a 650 * for Legacy mode
39b73fb1 651 * so just pass the CT_KILL temperature to iwl_legacy_tt_handler()
46f9381a
WYG		 652 * for advance mode
653 * pass CT_KILL_THRESHOLD+1 to make sure move into IWL_TI_CT_KILL state
39b73fb1 654 */
a28027cd 655static void iwl_bg_ct_enter(struct work_struct *work)
39b73fb1 656{
a28027cd 657 struct iwl_priv *priv = container_of(work, struct iwl_priv, ct_enter);
3ad3b92a 658 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
39b73fb1
WYG		 659
660 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
661 return;
662
a28027cd
WYG		 663 if (!iwl_is_ready(priv))
664 return;
665
39b73fb1
WYG		 666 if (tt->state != IWL_TI_CT_KILL) {
667 IWL_ERR(priv, "Device reached critical temperature "
668 "- ucode going to sleep!\n");
3ad3b92a 669 if (!priv->thermal_throttle.advanced_tt)
46f9381a
WYG		 670 iwl_legacy_tt_handler(priv,
671 IWL_MINIMAL_POWER_THRESHOLD);
672 else
673 iwl_advance_tt_handler(priv,
674 CT_KILL_THRESHOLD + 1);
39b73fb1
WYG		 675 }
676}
39b73fb1
WYG		 677
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
682 */
a28027cd 683static void iwl_bg_ct_exit(struct work_struct *work)
39b73fb1 684{
a28027cd 685 struct iwl_priv *priv = container_of(work, struct iwl_priv, ct_exit);
3ad3b92a 686 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
39b73fb1
WYG		 687
688 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
689 return;
690
a28027cd
WYG		 691 if (!iwl_is_ready(priv))
692 return;
693
39b73fb1 694 /* stop ct_kill_exit_tm timer */
3ad3b92a 695 del_timer_sync(&priv->thermal_throttle.ct_kill_exit_tm);
39b73fb1
WYG		 696
697 if (tt->state == IWL_TI_CT_KILL) {
698 IWL_ERR(priv,
699 "Device temperature below critical"
700 "- ucode awake!\n");
3ad3b92a 701 if (!priv->thermal_throttle.advanced_tt)
46f9381a
WYG		 702 iwl_legacy_tt_handler(priv,
703 IWL_REDUCED_PERFORMANCE_THRESHOLD_2);
704 else
705 iwl_advance_tt_handler(priv, CT_KILL_EXIT_THRESHOLD);
39b73fb1
WYG		 706 }
707}
a28027cd
WYG		 708
709void iwl_tt_enter_ct_kill(struct iwl_priv *priv)
710{
711 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
712 return;
713
714 IWL_DEBUG_POWER(priv, "Queueing critical temperature enter.\n");
715 queue_work(priv->workqueue, &priv->ct_enter);
716}
717EXPORT_SYMBOL(iwl_tt_enter_ct_kill);
718
719void iwl_tt_exit_ct_kill(struct iwl_priv *priv)
720{
721 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
722 return;
723
724 IWL_DEBUG_POWER(priv, "Queueing critical temperature exit.\n");
725 queue_work(priv->workqueue, &priv->ct_exit);
726}
39b73fb1
WYG		 727EXPORT_SYMBOL(iwl_tt_exit_ct_kill);
728
a28027cd 729static void iwl_bg_tt_work(struct work_struct *work)
39b73fb1 730{
a28027cd 731 struct iwl_priv *priv = container_of(work, struct iwl_priv, tt_work);
39b73fb1
WYG		 732 s32 temp = priv->temperature; /* degrees CELSIUS except 4965 */
733
734 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
735 return;
736
737 if ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) == CSR_HW_REV_TYPE_4965)
738 temp = KELVIN_TO_CELSIUS(priv->temperature);
739
3ad3b92a 740 if (!priv->thermal_throttle.advanced_tt)
46f9381a
WYG		 741 iwl_legacy_tt_handler(priv, temp);
742 else
743 iwl_advance_tt_handler(priv, temp);
39b73fb1 744}
a28027cd
WYG		 745
746void iwl_tt_handler(struct iwl_priv *priv)
747{
748 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
749 return;
750
751 IWL_DEBUG_POWER(priv, "Queueing thermal throttling work.\n");
752 queue_work(priv->workqueue, &priv->tt_work);
753}
39b73fb1
WYG		 754EXPORT_SYMBOL(iwl_tt_handler);
755
756/* Thermal throttling initialization
46f9381a
WYG		 757 * For advance thermal throttling:
758 * Initialize Thermal Index and temperature threshold table
759 * Initialize thermal throttling restriction table
39b73fb1
WYG		 760 */
761void iwl_tt_initialize(struct iwl_priv *priv)
762{
3ad3b92a 763 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
39b73fb1 764 struct iwl_power_mgr *setting = &priv->power_data;
46f9381a
WYG		 765 int size = sizeof(struct iwl_tt_trans) * (IWL_TI_STATE_MAX - 1);
766 struct iwl_tt_trans *transaction;
39b73fb1
WYG		 767
768 IWL_DEBUG_POWER(priv, "Initialize Thermal Throttling \n");
769
770 memset(tt, 0, sizeof(struct iwl_tt_mgmt));
771
772 tt->state = IWL_TI_0;
773 tt->sys_power_mode = setting->power_mode;
774 tt->tt_power_mode = tt->sys_power_mode;
3ad3b92a
JB		 775 init_timer(&priv->thermal_throttle.ct_kill_exit_tm);
776 priv->thermal_throttle.ct_kill_exit_tm.data = (unsigned long)priv;
777 priv->thermal_throttle.ct_kill_exit_tm.function = iwl_tt_check_exit_ct_kill;
a28027cd
WYG		 778
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);
783
46f9381a
WYG		 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),
792 GFP_KERNEL);
793 if (!tt->restriction || !tt->transaction) {
794 IWL_ERR(priv, "Fallback to Legacy Throttling\n");
3ad3b92a 795 priv->thermal_throttle.advanced_tt = false;
46f9381a
WYG		 796 kfree(tt->restriction);
797 tt->restriction = NULL;
798 kfree(tt->transaction);
799 tt->transaction = NULL;
800 } else {
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) *
814 IWL_TI_STATE_MAX;
815 memcpy(tt->restriction,
816 &restriction_range[0], size);
3ad3b92a 817 priv->thermal_throttle.advanced_tt = true;
46f9381a
WYG		 818 }
819 break;
820 default:
821 IWL_DEBUG_POWER(priv, "Legacy Thermal Throttling\n");
3ad3b92a 822 priv->thermal_throttle.advanced_tt = false;
46f9381a
WYG		 823 break;
824 }
39b73fb1
WYG		 825}
826EXPORT_SYMBOL(iwl_tt_initialize);
827
828/* cleanup thermal throttling management related memory and timer */
829void iwl_tt_exit(struct iwl_priv *priv)
830{
3ad3b92a 831 struct iwl_tt_mgmt *tt = &priv->thermal_throttle;
46f9381a 832
39b73fb1 833 /* stop ct_kill_exit_tm timer if activated */
3ad3b92a 834 del_timer_sync(&priv->thermal_throttle.ct_kill_exit_tm);
a28027cd
WYG		 835 cancel_work_sync(&priv->tt_work);
836 cancel_work_sync(&priv->ct_enter);
837 cancel_work_sync(&priv->ct_exit);
46f9381a 838
3ad3b92a 839 if (priv->thermal_throttle.advanced_tt) {
46f9381a
WYG		 840 /* free advance thermal throttling memory */
841 kfree(tt->restriction);
842 tt->restriction = NULL;
843 kfree(tt->transaction);
844 tt->transaction = NULL;
845 }
39b73fb1
WYG		 846}
847EXPORT_SYMBOL(iwl_tt_exit);
848
a96a27f9 849/* initialize to default */
5da4b55f
MA		 850void iwl_power_initialize(struct iwl_priv *priv)
851{
5da4b55f 852 iwl_power_init_handle(priv);
7af2c460
JB		 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;
5da4b55f
MA		 856}
857EXPORT_SYMBOL(iwl_power_initialize);
kernel source for telekom puls (alcatel/mediatek)