Eytan Lifshitz | 9ee718a | 2013-05-19 19:14:41 +0300 | [diff] [blame] | 1 | /****************************************************************************** |
| 2 | * |
| 3 | * This file is provided under a dual BSD/GPLv2 license. When using or |
| 4 | * redistributing this file, you may do so under either license. |
| 5 | * |
| 6 | * GPL LICENSE SUMMARY |
| 7 | * |
Emmanuel Grumbach | 51368bf | 2013-12-30 13:15:54 +0200 | [diff] [blame] | 8 | * Copyright(c) 2013 - 2014 Intel Corporation. All rights reserved. |
Eytan Lifshitz | 9ee718a | 2013-05-19 19:14:41 +0300 | [diff] [blame] | 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of version 2 of the GNU General Public License as |
| 12 | * published by the Free Software Foundation. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, but |
| 15 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 17 | * General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; if not, write to the Free Software |
| 21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, |
| 22 | * USA |
| 23 | * |
| 24 | * The full GNU General Public License is included in this distribution |
| 25 | * in the file called COPYING. |
| 26 | * |
| 27 | * Contact Information: |
| 28 | * Intel Linux Wireless <ilw@linux.intel.com> |
| 29 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
| 30 | * |
| 31 | * BSD LICENSE |
| 32 | * |
Emmanuel Grumbach | 51368bf | 2013-12-30 13:15:54 +0200 | [diff] [blame] | 33 | * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. |
Eytan Lifshitz | 9ee718a | 2013-05-19 19:14:41 +0300 | [diff] [blame] | 34 | * All rights reserved. |
| 35 | * |
| 36 | * Redistribution and use in source and binary forms, with or without |
| 37 | * modification, are permitted provided that the following conditions |
| 38 | * are met: |
| 39 | * |
| 40 | * * Redistributions of source code must retain the above copyright |
| 41 | * notice, this list of conditions and the following disclaimer. |
| 42 | * * Redistributions in binary form must reproduce the above copyright |
| 43 | * notice, this list of conditions and the following disclaimer in |
| 44 | * the documentation and/or other materials provided with the |
| 45 | * distribution. |
| 46 | * * Neither the name Intel Corporation nor the names of its |
| 47 | * contributors may be used to endorse or promote products derived |
| 48 | * from this software without specific prior written permission. |
| 49 | * |
| 50 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 51 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 52 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 53 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 54 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 55 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 56 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 57 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 58 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 59 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 60 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 61 | * |
| 62 | *****************************************************************************/ |
| 63 | |
| 64 | #include "mvm.h" |
| 65 | #include "iwl-config.h" |
| 66 | #include "iwl-io.h" |
| 67 | #include "iwl-csr.h" |
| 68 | #include "iwl-prph.h" |
| 69 | |
| 70 | #define OTP_DTS_DIODE_DEVIATION 96 /*in words*/ |
| 71 | /* VBG - Voltage Band Gap error data (temperature offset) */ |
| 72 | #define OTP_WP_DTS_VBG (OTP_DTS_DIODE_DEVIATION + 2) |
| 73 | #define MEAS_VBG_MIN_VAL 2300 |
| 74 | #define MEAS_VBG_MAX_VAL 3000 |
| 75 | #define MEAS_VBG_DEFAULT_VAL 2700 |
| 76 | #define DTS_DIODE_VALID(flags) (flags & DTS_DIODE_REG_FLAGS_PASS_ONCE) |
| 77 | #define MIN_TEMPERATURE 0 |
| 78 | #define MAX_TEMPERATURE 125 |
| 79 | #define TEMPERATURE_ERROR (MAX_TEMPERATURE + 1) |
| 80 | #define PTAT_DIGITAL_VALUE_MIN_VALUE 0 |
| 81 | #define PTAT_DIGITAL_VALUE_MAX_VALUE 0xFF |
| 82 | #define DTS_VREFS_NUM 5 |
| 83 | static inline u32 DTS_DIODE_GET_VREFS_ID(u32 flags) |
| 84 | { |
| 85 | return (flags & DTS_DIODE_REG_FLAGS_VREFS_ID) >> |
| 86 | DTS_DIODE_REG_FLAGS_VREFS_ID_POS; |
| 87 | } |
| 88 | |
| 89 | #define CALC_VREFS_MIN_DIFF 43 |
| 90 | #define CALC_VREFS_MAX_DIFF 51 |
| 91 | #define CALC_LUT_SIZE (1 + CALC_VREFS_MAX_DIFF - CALC_VREFS_MIN_DIFF) |
| 92 | #define CALC_LUT_INDEX_OFFSET CALC_VREFS_MIN_DIFF |
| 93 | #define CALC_TEMPERATURE_RESULT_SHIFT_OFFSET 23 |
| 94 | |
| 95 | /* |
| 96 | * @digital_value: The diode's digital-value sampled (temperature/voltage) |
| 97 | * @vref_low: The lower voltage-reference (the vref just below the diode's |
| 98 | * sampled digital-value) |
| 99 | * @vref_high: The higher voltage-reference (the vref just above the diode's |
| 100 | * sampled digital-value) |
| 101 | * @flags: bits[1:0]: The ID of the Vrefs pair (lowVref,highVref) |
| 102 | * bits[6:2]: Reserved. |
| 103 | * bits[7:7]: Indicates completion of at least 1 successful sample |
| 104 | * since last DTS reset. |
| 105 | */ |
| 106 | struct iwl_mvm_dts_diode_bits { |
| 107 | u8 digital_value; |
| 108 | u8 vref_low; |
| 109 | u8 vref_high; |
| 110 | u8 flags; |
| 111 | } __packed; |
| 112 | |
| 113 | union dts_diode_results { |
| 114 | u32 reg_value; |
| 115 | struct iwl_mvm_dts_diode_bits bits; |
| 116 | } __packed; |
| 117 | |
| 118 | static s16 iwl_mvm_dts_get_volt_band_gap(struct iwl_mvm *mvm) |
| 119 | { |
| 120 | struct iwl_nvm_section calib_sec; |
| 121 | const __le16 *calib; |
| 122 | u16 vbg; |
| 123 | |
| 124 | /* TODO: move parsing to NVM code */ |
| 125 | calib_sec = mvm->nvm_sections[NVM_SECTION_TYPE_CALIBRATION]; |
| 126 | calib = (__le16 *)calib_sec.data; |
| 127 | |
| 128 | vbg = le16_to_cpu(calib[OTP_WP_DTS_VBG]); |
| 129 | |
| 130 | if (vbg < MEAS_VBG_MIN_VAL || vbg > MEAS_VBG_MAX_VAL) |
| 131 | vbg = MEAS_VBG_DEFAULT_VAL; |
| 132 | |
| 133 | return vbg; |
| 134 | } |
| 135 | |
| 136 | static u16 iwl_mvm_dts_get_ptat_deviation_offset(struct iwl_mvm *mvm) |
| 137 | { |
| 138 | const u8 *calib; |
| 139 | u8 ptat, pa1, pa2, median; |
| 140 | |
| 141 | /* TODO: move parsing to NVM code */ |
| 142 | calib = mvm->nvm_sections[NVM_SECTION_TYPE_CALIBRATION].data; |
| 143 | ptat = calib[OTP_DTS_DIODE_DEVIATION]; |
| 144 | pa1 = calib[OTP_DTS_DIODE_DEVIATION + 1]; |
| 145 | pa2 = calib[OTP_DTS_DIODE_DEVIATION + 2]; |
| 146 | |
| 147 | /* get the median: */ |
| 148 | if (ptat > pa1) { |
| 149 | if (ptat > pa2) |
| 150 | median = (pa1 > pa2) ? pa1 : pa2; |
| 151 | else |
| 152 | median = ptat; |
| 153 | } else { |
| 154 | if (pa1 > pa2) |
| 155 | median = (ptat > pa2) ? ptat : pa2; |
| 156 | else |
| 157 | median = pa1; |
| 158 | } |
| 159 | |
| 160 | return ptat - median; |
| 161 | } |
| 162 | |
| 163 | static u8 iwl_mvm_dts_calibrate_ptat_deviation(struct iwl_mvm *mvm, u8 value) |
| 164 | { |
| 165 | /* Calibrate the PTAT digital value, based on PTAT deviation data: */ |
| 166 | s16 new_val = value - iwl_mvm_dts_get_ptat_deviation_offset(mvm); |
| 167 | |
| 168 | if (new_val > PTAT_DIGITAL_VALUE_MAX_VALUE) |
| 169 | new_val = PTAT_DIGITAL_VALUE_MAX_VALUE; |
| 170 | else if (new_val < PTAT_DIGITAL_VALUE_MIN_VALUE) |
| 171 | new_val = PTAT_DIGITAL_VALUE_MIN_VALUE; |
| 172 | |
| 173 | return new_val; |
| 174 | } |
| 175 | |
| 176 | static bool dts_get_adjacent_vrefs(struct iwl_mvm *mvm, |
| 177 | union dts_diode_results *avg_ptat) |
| 178 | { |
| 179 | u8 vrefs_results[DTS_VREFS_NUM]; |
| 180 | u8 low_vref_index = 0, flags; |
| 181 | u32 reg; |
| 182 | |
| 183 | reg = iwl_read_prph(mvm->trans, DTSC_VREF_AVG); |
| 184 | memcpy(vrefs_results, ®, sizeof(reg)); |
| 185 | reg = iwl_read_prph(mvm->trans, DTSC_VREF5_AVG); |
| 186 | vrefs_results[4] = reg & 0xff; |
| 187 | |
| 188 | if (avg_ptat->bits.digital_value < vrefs_results[0] || |
| 189 | avg_ptat->bits.digital_value > vrefs_results[4]) |
| 190 | return false; |
| 191 | |
| 192 | if (avg_ptat->bits.digital_value > vrefs_results[3]) |
| 193 | low_vref_index = 3; |
| 194 | else if (avg_ptat->bits.digital_value > vrefs_results[2]) |
| 195 | low_vref_index = 2; |
| 196 | else if (avg_ptat->bits.digital_value > vrefs_results[1]) |
| 197 | low_vref_index = 1; |
| 198 | |
| 199 | avg_ptat->bits.vref_low = vrefs_results[low_vref_index]; |
| 200 | avg_ptat->bits.vref_high = vrefs_results[low_vref_index + 1]; |
| 201 | flags = avg_ptat->bits.flags; |
| 202 | avg_ptat->bits.flags = |
| 203 | (flags & ~DTS_DIODE_REG_FLAGS_VREFS_ID) | |
| 204 | (low_vref_index & DTS_DIODE_REG_FLAGS_VREFS_ID); |
| 205 | return true; |
| 206 | } |
| 207 | |
| 208 | /* |
| 209 | * return true it the results are valid, and false otherwise. |
| 210 | */ |
| 211 | static bool dts_read_ptat_avg_results(struct iwl_mvm *mvm, |
| 212 | union dts_diode_results *avg_ptat) |
| 213 | { |
| 214 | u32 reg; |
| 215 | u8 tmp; |
| 216 | |
| 217 | /* fill the diode value and pass_once with avg-reg results */ |
| 218 | reg = iwl_read_prph(mvm->trans, DTSC_PTAT_AVG); |
| 219 | reg &= DTS_DIODE_REG_DIG_VAL | DTS_DIODE_REG_PASS_ONCE; |
| 220 | avg_ptat->reg_value = reg; |
| 221 | |
| 222 | /* calibrate the PTAT digital value */ |
| 223 | tmp = avg_ptat->bits.digital_value; |
| 224 | tmp = iwl_mvm_dts_calibrate_ptat_deviation(mvm, tmp); |
| 225 | avg_ptat->bits.digital_value = tmp; |
| 226 | |
| 227 | /* |
| 228 | * fill vrefs fields, based on the avgVrefs results |
| 229 | * and the diode value |
| 230 | */ |
| 231 | return dts_get_adjacent_vrefs(mvm, avg_ptat) && |
| 232 | DTS_DIODE_VALID(avg_ptat->bits.flags); |
| 233 | } |
| 234 | |
| 235 | static s32 calculate_nic_temperature(union dts_diode_results avg_ptat, |
| 236 | u16 volt_band_gap) |
| 237 | { |
| 238 | u32 tmp_result; |
| 239 | u8 vrefs_diff; |
| 240 | /* |
| 241 | * For temperature calculation (at the end, shift right by 23) |
| 242 | * LUT[(D2-D1)] = ROUND{ 2^23 / ((D2-D1)*9*10) } |
| 243 | * (D2-D1) == 43 44 45 46 47 48 49 50 51 |
| 244 | */ |
| 245 | static const u16 calc_lut[CALC_LUT_SIZE] = { |
| 246 | 2168, 2118, 2071, 2026, 1983, 1942, 1902, 1864, 1828, |
| 247 | }; |
| 248 | |
| 249 | /* |
| 250 | * The diff between the high and low voltage-references is assumed |
| 251 | * to be strictly be in range of [60,68] |
| 252 | */ |
| 253 | vrefs_diff = avg_ptat.bits.vref_high - avg_ptat.bits.vref_low; |
| 254 | |
| 255 | if (vrefs_diff < CALC_VREFS_MIN_DIFF || |
| 256 | vrefs_diff > CALC_VREFS_MAX_DIFF) |
| 257 | return TEMPERATURE_ERROR; |
| 258 | |
| 259 | /* calculate the result: */ |
| 260 | tmp_result = |
| 261 | vrefs_diff * (DTS_DIODE_GET_VREFS_ID(avg_ptat.bits.flags) + 9); |
| 262 | tmp_result += avg_ptat.bits.digital_value; |
| 263 | tmp_result -= avg_ptat.bits.vref_high; |
| 264 | |
| 265 | /* multiply by the LUT value (based on the diff) */ |
| 266 | tmp_result *= calc_lut[vrefs_diff - CALC_LUT_INDEX_OFFSET]; |
| 267 | |
| 268 | /* |
| 269 | * Get the BandGap (the voltage refereces source) error data |
| 270 | * (temperature offset) |
| 271 | */ |
| 272 | tmp_result *= volt_band_gap; |
| 273 | |
| 274 | /* |
| 275 | * here, tmp_result value can be up to 32-bits. We want to right-shift |
| 276 | * it *without* sign-extend. |
| 277 | */ |
| 278 | tmp_result = tmp_result >> CALC_TEMPERATURE_RESULT_SHIFT_OFFSET; |
| 279 | |
| 280 | /* |
| 281 | * at this point, tmp_result should be in the range: |
| 282 | * 200 <= tmp_result <= 365 |
| 283 | */ |
| 284 | return (s16)tmp_result - 240; |
| 285 | } |
| 286 | |
| 287 | static s32 check_nic_temperature(struct iwl_mvm *mvm) |
| 288 | { |
| 289 | u16 volt_band_gap; |
| 290 | union dts_diode_results avg_ptat; |
| 291 | |
| 292 | volt_band_gap = iwl_mvm_dts_get_volt_band_gap(mvm); |
| 293 | |
| 294 | /* disable DTS */ |
| 295 | iwl_write_prph(mvm->trans, SHR_MISC_WFM_DTS_EN, 0); |
| 296 | |
| 297 | /* SV initialization */ |
| 298 | iwl_write_prph(mvm->trans, SHR_MISC_WFM_DTS_EN, 1); |
| 299 | iwl_write_prph(mvm->trans, DTSC_CFG_MODE, |
| 300 | DTSC_CFG_MODE_PERIODIC); |
| 301 | |
| 302 | /* wait for results */ |
| 303 | msleep(100); |
| 304 | if (!dts_read_ptat_avg_results(mvm, &avg_ptat)) |
| 305 | return TEMPERATURE_ERROR; |
| 306 | |
| 307 | /* disable DTS */ |
| 308 | iwl_write_prph(mvm->trans, SHR_MISC_WFM_DTS_EN, 0); |
| 309 | |
| 310 | return calculate_nic_temperature(avg_ptat, volt_band_gap); |
| 311 | } |
| 312 | |
| 313 | static void iwl_mvm_enter_ctkill(struct iwl_mvm *mvm) |
| 314 | { |
| 315 | u32 duration = mvm->thermal_throttle.params->ct_kill_duration; |
| 316 | |
| 317 | IWL_ERR(mvm, "Enter CT Kill\n"); |
| 318 | iwl_mvm_set_hw_ctkill_state(mvm, true); |
| 319 | schedule_delayed_work(&mvm->thermal_throttle.ct_kill_exit, |
| 320 | round_jiffies_relative(duration * HZ)); |
| 321 | } |
| 322 | |
| 323 | static void iwl_mvm_exit_ctkill(struct iwl_mvm *mvm) |
| 324 | { |
| 325 | IWL_ERR(mvm, "Exit CT Kill\n"); |
| 326 | iwl_mvm_set_hw_ctkill_state(mvm, false); |
| 327 | } |
| 328 | |
| 329 | static void check_exit_ctkill(struct work_struct *work) |
| 330 | { |
| 331 | struct iwl_mvm_tt_mgmt *tt; |
| 332 | struct iwl_mvm *mvm; |
| 333 | u32 duration; |
| 334 | s32 temp; |
| 335 | |
| 336 | tt = container_of(work, struct iwl_mvm_tt_mgmt, ct_kill_exit.work); |
| 337 | mvm = container_of(tt, struct iwl_mvm, thermal_throttle); |
| 338 | |
| 339 | duration = tt->params->ct_kill_duration; |
| 340 | |
| 341 | iwl_trans_start_hw(mvm->trans); |
| 342 | temp = check_nic_temperature(mvm); |
Arik Nemtsov | a408284 | 2013-11-24 19:10:46 +0200 | [diff] [blame] | 343 | iwl_trans_stop_device(mvm->trans); |
Eytan Lifshitz | 9ee718a | 2013-05-19 19:14:41 +0300 | [diff] [blame] | 344 | |
| 345 | if (temp < MIN_TEMPERATURE || temp > MAX_TEMPERATURE) { |
| 346 | IWL_DEBUG_TEMP(mvm, "Failed to measure NIC temperature\n"); |
| 347 | goto reschedule; |
| 348 | } |
| 349 | IWL_DEBUG_TEMP(mvm, "NIC temperature: %d\n", temp); |
| 350 | |
| 351 | if (temp <= tt->params->ct_kill_exit) { |
| 352 | iwl_mvm_exit_ctkill(mvm); |
| 353 | return; |
| 354 | } |
| 355 | |
| 356 | reschedule: |
| 357 | schedule_delayed_work(&mvm->thermal_throttle.ct_kill_exit, |
| 358 | round_jiffies(duration * HZ)); |
| 359 | } |
| 360 | |
| 361 | static void iwl_mvm_tt_smps_iterator(void *_data, u8 *mac, |
| 362 | struct ieee80211_vif *vif) |
| 363 | { |
| 364 | struct iwl_mvm *mvm = _data; |
| 365 | enum ieee80211_smps_mode smps_mode; |
| 366 | |
| 367 | lockdep_assert_held(&mvm->mutex); |
| 368 | |
| 369 | if (mvm->thermal_throttle.dynamic_smps) |
| 370 | smps_mode = IEEE80211_SMPS_DYNAMIC; |
| 371 | else |
| 372 | smps_mode = IEEE80211_SMPS_AUTOMATIC; |
| 373 | |
Eytan Lifshitz | fded313 | 2013-06-04 12:28:51 +0300 | [diff] [blame] | 374 | if (vif->type != NL80211_IFTYPE_STATION) |
| 375 | return; |
| 376 | |
Eytan Lifshitz | 9ee718a | 2013-05-19 19:14:41 +0300 | [diff] [blame] | 377 | iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT, smps_mode); |
| 378 | } |
| 379 | |
| 380 | static void iwl_mvm_tt_tx_protection(struct iwl_mvm *mvm, bool enable) |
| 381 | { |
| 382 | struct ieee80211_sta *sta; |
| 383 | struct iwl_mvm_sta *mvmsta; |
| 384 | int i, err; |
| 385 | |
| 386 | for (i = 0; i < IWL_MVM_STATION_COUNT; i++) { |
| 387 | sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i], |
| 388 | lockdep_is_held(&mvm->mutex)); |
| 389 | if (IS_ERR_OR_NULL(sta)) |
| 390 | continue; |
Johannes Berg | 5b577a9 | 2013-11-14 18:20:04 +0100 | [diff] [blame] | 391 | mvmsta = iwl_mvm_sta_from_mac80211(sta); |
Eytan Lifshitz | 9ee718a | 2013-05-19 19:14:41 +0300 | [diff] [blame] | 392 | if (enable == mvmsta->tt_tx_protection) |
| 393 | continue; |
Johannes Berg | e126b5d | 2013-06-28 13:39:18 +0200 | [diff] [blame] | 394 | err = iwl_mvm_tx_protection(mvm, mvmsta, enable); |
Eytan Lifshitz | 9ee718a | 2013-05-19 19:14:41 +0300 | [diff] [blame] | 395 | if (err) { |
| 396 | IWL_ERR(mvm, "Failed to %s Tx protection\n", |
| 397 | enable ? "enable" : "disable"); |
| 398 | } else { |
| 399 | IWL_DEBUG_TEMP(mvm, "%s Tx protection\n", |
| 400 | enable ? "Enable" : "Disable"); |
| 401 | mvmsta->tt_tx_protection = enable; |
| 402 | } |
| 403 | } |
| 404 | } |
| 405 | |
Ido Yariv | 0c0e2c7 | 2014-01-16 21:12:02 -0500 | [diff] [blame] | 406 | void iwl_mvm_tt_tx_backoff(struct iwl_mvm *mvm, u32 backoff) |
Eytan Lifshitz | 9ee718a | 2013-05-19 19:14:41 +0300 | [diff] [blame] | 407 | { |
| 408 | struct iwl_host_cmd cmd = { |
| 409 | .id = REPLY_THERMAL_MNG_BACKOFF, |
| 410 | .len = { sizeof(u32), }, |
| 411 | .data = { &backoff, }, |
| 412 | .flags = CMD_SYNC, |
| 413 | }; |
| 414 | |
Ido Yariv | 0c0e2c7 | 2014-01-16 21:12:02 -0500 | [diff] [blame] | 415 | backoff = max(backoff, mvm->thermal_throttle.min_backoff); |
| 416 | |
Eytan Lifshitz | 9ee718a | 2013-05-19 19:14:41 +0300 | [diff] [blame] | 417 | if (iwl_mvm_send_cmd(mvm, &cmd) == 0) { |
| 418 | IWL_DEBUG_TEMP(mvm, "Set Thermal Tx backoff to: %u\n", |
| 419 | backoff); |
| 420 | mvm->thermal_throttle.tx_backoff = backoff; |
| 421 | } else { |
| 422 | IWL_ERR(mvm, "Failed to change Thermal Tx backoff\n"); |
| 423 | } |
| 424 | } |
| 425 | |
| 426 | void iwl_mvm_tt_handler(struct iwl_mvm *mvm) |
| 427 | { |
| 428 | const struct iwl_tt_params *params = mvm->thermal_throttle.params; |
| 429 | struct iwl_mvm_tt_mgmt *tt = &mvm->thermal_throttle; |
| 430 | s32 temperature = mvm->temperature; |
eytan lifshitz | dafe6c4 | 2013-06-18 14:28:56 +0300 | [diff] [blame] | 431 | bool throttle_enable = false; |
Eytan Lifshitz | 9ee718a | 2013-05-19 19:14:41 +0300 | [diff] [blame] | 432 | int i; |
| 433 | u32 tx_backoff; |
| 434 | |
| 435 | IWL_DEBUG_TEMP(mvm, "NIC temperature: %d\n", mvm->temperature); |
| 436 | |
| 437 | if (params->support_ct_kill && temperature >= params->ct_kill_entry) { |
| 438 | iwl_mvm_enter_ctkill(mvm); |
| 439 | return; |
| 440 | } |
| 441 | |
| 442 | if (params->support_dynamic_smps) { |
| 443 | if (!tt->dynamic_smps && |
| 444 | temperature >= params->dynamic_smps_entry) { |
| 445 | IWL_DEBUG_TEMP(mvm, "Enable dynamic SMPS\n"); |
| 446 | tt->dynamic_smps = true; |
| 447 | ieee80211_iterate_active_interfaces_atomic( |
| 448 | mvm->hw, IEEE80211_IFACE_ITER_NORMAL, |
| 449 | iwl_mvm_tt_smps_iterator, mvm); |
eytan lifshitz | dafe6c4 | 2013-06-18 14:28:56 +0300 | [diff] [blame] | 450 | throttle_enable = true; |
Eytan Lifshitz | 9ee718a | 2013-05-19 19:14:41 +0300 | [diff] [blame] | 451 | } else if (tt->dynamic_smps && |
| 452 | temperature <= params->dynamic_smps_exit) { |
| 453 | IWL_DEBUG_TEMP(mvm, "Disable dynamic SMPS\n"); |
| 454 | tt->dynamic_smps = false; |
| 455 | ieee80211_iterate_active_interfaces_atomic( |
| 456 | mvm->hw, IEEE80211_IFACE_ITER_NORMAL, |
| 457 | iwl_mvm_tt_smps_iterator, mvm); |
| 458 | } |
| 459 | } |
| 460 | |
| 461 | if (params->support_tx_protection) { |
eytan lifshitz | dafe6c4 | 2013-06-18 14:28:56 +0300 | [diff] [blame] | 462 | if (temperature >= params->tx_protection_entry) { |
Eytan Lifshitz | 9ee718a | 2013-05-19 19:14:41 +0300 | [diff] [blame] | 463 | iwl_mvm_tt_tx_protection(mvm, true); |
eytan lifshitz | dafe6c4 | 2013-06-18 14:28:56 +0300 | [diff] [blame] | 464 | throttle_enable = true; |
| 465 | } else if (temperature <= params->tx_protection_exit) { |
Eytan Lifshitz | 9ee718a | 2013-05-19 19:14:41 +0300 | [diff] [blame] | 466 | iwl_mvm_tt_tx_protection(mvm, false); |
eytan lifshitz | dafe6c4 | 2013-06-18 14:28:56 +0300 | [diff] [blame] | 467 | } |
Eytan Lifshitz | 9ee718a | 2013-05-19 19:14:41 +0300 | [diff] [blame] | 468 | } |
| 469 | |
| 470 | if (params->support_tx_backoff) { |
| 471 | tx_backoff = 0; |
| 472 | for (i = 0; i < TT_TX_BACKOFF_SIZE; i++) { |
| 473 | if (temperature < params->tx_backoff[i].temperature) |
| 474 | break; |
| 475 | tx_backoff = params->tx_backoff[i].backoff; |
| 476 | } |
eytan lifshitz | dafe6c4 | 2013-06-18 14:28:56 +0300 | [diff] [blame] | 477 | if (tx_backoff != 0) |
| 478 | throttle_enable = true; |
Eytan Lifshitz | 9ee718a | 2013-05-19 19:14:41 +0300 | [diff] [blame] | 479 | if (tt->tx_backoff != tx_backoff) |
| 480 | iwl_mvm_tt_tx_backoff(mvm, tx_backoff); |
| 481 | } |
eytan lifshitz | dafe6c4 | 2013-06-18 14:28:56 +0300 | [diff] [blame] | 482 | |
| 483 | if (!tt->throttle && throttle_enable) { |
| 484 | IWL_WARN(mvm, |
| 485 | "Due to high temperature thermal throttling initiated\n"); |
| 486 | tt->throttle = true; |
| 487 | } else if (tt->throttle && !tt->dynamic_smps && tt->tx_backoff == 0 && |
| 488 | temperature <= params->tx_protection_exit) { |
| 489 | IWL_WARN(mvm, |
| 490 | "Temperature is back to normal thermal throttling stopped\n"); |
| 491 | tt->throttle = false; |
| 492 | } |
Eytan Lifshitz | 9ee718a | 2013-05-19 19:14:41 +0300 | [diff] [blame] | 493 | } |
| 494 | |
| 495 | static const struct iwl_tt_params iwl7000_tt_params = { |
| 496 | .ct_kill_entry = 118, |
| 497 | .ct_kill_exit = 96, |
| 498 | .ct_kill_duration = 5, |
| 499 | .dynamic_smps_entry = 114, |
| 500 | .dynamic_smps_exit = 110, |
| 501 | .tx_protection_entry = 114, |
| 502 | .tx_protection_exit = 108, |
| 503 | .tx_backoff = { |
| 504 | {.temperature = 112, .backoff = 200}, |
| 505 | {.temperature = 113, .backoff = 600}, |
| 506 | {.temperature = 114, .backoff = 1200}, |
| 507 | {.temperature = 115, .backoff = 2000}, |
| 508 | {.temperature = 116, .backoff = 4000}, |
| 509 | {.temperature = 117, .backoff = 10000}, |
| 510 | }, |
| 511 | .support_ct_kill = true, |
| 512 | .support_dynamic_smps = true, |
| 513 | .support_tx_protection = true, |
| 514 | .support_tx_backoff = true, |
| 515 | }; |
| 516 | |
Eytan Lifshitz | 6be497f | 2013-07-24 14:49:18 +0300 | [diff] [blame] | 517 | static const struct iwl_tt_params iwl7000_high_temp_tt_params = { |
| 518 | .ct_kill_entry = 118, |
| 519 | .ct_kill_exit = 96, |
| 520 | .ct_kill_duration = 5, |
| 521 | .dynamic_smps_entry = 114, |
| 522 | .dynamic_smps_exit = 110, |
| 523 | .tx_protection_entry = 114, |
| 524 | .tx_protection_exit = 108, |
| 525 | .tx_backoff = { |
| 526 | {.temperature = 112, .backoff = 300}, |
| 527 | {.temperature = 113, .backoff = 800}, |
| 528 | {.temperature = 114, .backoff = 1500}, |
| 529 | {.temperature = 115, .backoff = 3000}, |
| 530 | {.temperature = 116, .backoff = 5000}, |
| 531 | {.temperature = 117, .backoff = 10000}, |
| 532 | }, |
| 533 | .support_ct_kill = true, |
| 534 | .support_dynamic_smps = true, |
| 535 | .support_tx_protection = true, |
| 536 | .support_tx_backoff = true, |
| 537 | }; |
| 538 | |
Ido Yariv | 0c0e2c7 | 2014-01-16 21:12:02 -0500 | [diff] [blame] | 539 | void iwl_mvm_tt_initialize(struct iwl_mvm *mvm, u32 min_backoff) |
Eytan Lifshitz | 9ee718a | 2013-05-19 19:14:41 +0300 | [diff] [blame] | 540 | { |
| 541 | struct iwl_mvm_tt_mgmt *tt = &mvm->thermal_throttle; |
| 542 | |
| 543 | IWL_DEBUG_TEMP(mvm, "Initialize Thermal Throttling\n"); |
Eytan Lifshitz | 6be497f | 2013-07-24 14:49:18 +0300 | [diff] [blame] | 544 | |
| 545 | if (mvm->cfg->high_temp) |
| 546 | tt->params = &iwl7000_high_temp_tt_params; |
| 547 | else |
| 548 | tt->params = &iwl7000_tt_params; |
| 549 | |
eytan lifshitz | dafe6c4 | 2013-06-18 14:28:56 +0300 | [diff] [blame] | 550 | tt->throttle = false; |
Ido Yariv | 0c0e2c7 | 2014-01-16 21:12:02 -0500 | [diff] [blame] | 551 | tt->min_backoff = min_backoff; |
Eytan Lifshitz | 9ee718a | 2013-05-19 19:14:41 +0300 | [diff] [blame] | 552 | INIT_DELAYED_WORK(&tt->ct_kill_exit, check_exit_ctkill); |
| 553 | } |
| 554 | |
| 555 | void iwl_mvm_tt_exit(struct iwl_mvm *mvm) |
| 556 | { |
| 557 | cancel_delayed_work_sync(&mvm->thermal_throttle.ct_kill_exit); |
| 558 | IWL_DEBUG_TEMP(mvm, "Exit Thermal Throttling\n"); |
| 559 | } |