1/****************************************************************************** 2 * 3 * Copyright(c) 2007 - 2014 Intel Corporation. All rights reserved. 4 * 5 * Portions of this file are derived from the ipw3945 project, as well 6 * as portions of the ieee80211 subsystem header files. 7 * 8 * This program is free software; you can redistribute it and/or modify it 9 * under the terms of version 2 of the GNU General Public License as 10 * published by the Free Software Foundation. 11 * 12 * This program is distributed in the hope that it will be useful, but WITHOUT 13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 15 * more details. 16 * 17 * You should have received a copy of the GNU General Public License along with 18 * this program; if not, write to the Free Software Foundation, Inc., 19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA 20 * 21 * The full GNU General Public License is included in this distribution in the 22 * file called LICENSE. 23 * 24 * Contact Information: 25 * Intel Linux Wireless <ilw@linux.intel.com> 26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 27 *****************************************************************************/ 28 29 30#include <linux/kernel.h> 31#include <linux/module.h> 32#include <linux/slab.h> 33#include <net/mac80211.h> 34#include "iwl-io.h" 35#include "iwl-debug.h" 36#include "iwl-trans.h" 37#include "iwl-modparams.h" 38#include "dev.h" 39#include "agn.h" 40#include "commands.h" 41#include "power.h" 42 43static bool force_cam = true; 44module_param(force_cam, bool, 0644); 45MODULE_PARM_DESC(force_cam, "force continuously aware mode (no power saving at all)"); 46 47/* 48 * Setting power level allows the card to go to sleep when not busy. 49 * 50 * We calculate a sleep command based on the required latency, which 51 * we get from mac80211. In order to handle thermal throttling, we can 52 * also use pre-defined power levels. 53 */ 54 55/* 56 * This defines the old power levels. They are still used by default 57 * (level 1) and for thermal throttle (levels 3 through 5) 58 */ 59 60struct iwl_power_vec_entry { 61 struct iwl_powertable_cmd cmd; 62 u8 no_dtim; /* number of skip dtim */ 63}; 64 65#define IWL_DTIM_RANGE_0_MAX 2 66#define IWL_DTIM_RANGE_1_MAX 10 67 68#define NOSLP cpu_to_le16(0), 0, 0 69#define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK, 0, 0 70#define ASLP (IWL_POWER_POWER_SAVE_ENA_MSK | \ 71 IWL_POWER_POWER_MANAGEMENT_ENA_MSK | \ 72 IWL_POWER_ADVANCE_PM_ENA_MSK) 73#define ASLP_TOUT(T) cpu_to_le32(T) 74#define TU_TO_USEC 1024 75#define SLP_TOUT(T) cpu_to_le32((T) * TU_TO_USEC) 76#define SLP_VEC(X0, X1, X2, X3, X4) {cpu_to_le32(X0), \ 77 cpu_to_le32(X1), \ 78 cpu_to_le32(X2), \ 79 cpu_to_le32(X3), \ 80 cpu_to_le32(X4)} 81/* default power management (not Tx power) table values */ 82/* for DTIM period 0 through IWL_DTIM_RANGE_0_MAX */ 83/* DTIM 0 - 2 */ 84static const struct iwl_power_vec_entry range_0[IWL_POWER_NUM] = { 85 {{SLP, SLP_TOUT(200), SLP_TOUT(500), SLP_VEC(1, 1, 2, 2, 0xFF)}, 0}, 86 {{SLP, SLP_TOUT(200), SLP_TOUT(300), SLP_VEC(1, 2, 2, 2, 0xFF)}, 0}, 87 {{SLP, SLP_TOUT(50), SLP_TOUT(100), SLP_VEC(2, 2, 2, 2, 0xFF)}, 0}, 88 {{SLP, SLP_TOUT(50), SLP_TOUT(25), SLP_VEC(2, 2, 4, 4, 0xFF)}, 1}, 89 {{SLP, SLP_TOUT(25), SLP_TOUT(25), SLP_VEC(2, 2, 4, 6, 0xFF)}, 2} 90}; 91 92 93/* for DTIM period IWL_DTIM_RANGE_0_MAX + 1 through IWL_DTIM_RANGE_1_MAX */ 94/* DTIM 3 - 10 */ 95static const struct iwl_power_vec_entry range_1[IWL_POWER_NUM] = { 96 {{SLP, SLP_TOUT(200), SLP_TOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0}, 97 {{SLP, SLP_TOUT(200), SLP_TOUT(300), SLP_VEC(1, 2, 3, 4, 7)}, 0}, 98 {{SLP, SLP_TOUT(50), SLP_TOUT(100), SLP_VEC(2, 4, 6, 7, 9)}, 0}, 99 {{SLP, SLP_TOUT(50), SLP_TOUT(25), SLP_VEC(2, 4, 6, 9, 10)}, 1}, 100 {{SLP, SLP_TOUT(25), SLP_TOUT(25), SLP_VEC(2, 4, 6, 10, 10)}, 2} 101}; 102 103/* for DTIM period > IWL_DTIM_RANGE_1_MAX */ 104/* DTIM 11 - */ 105static const struct iwl_power_vec_entry range_2[IWL_POWER_NUM] = { 106 {{SLP, SLP_TOUT(200), SLP_TOUT(500), SLP_VEC(1, 2, 3, 4, 0xFF)}, 0}, 107 {{SLP, SLP_TOUT(200), SLP_TOUT(300), SLP_VEC(2, 4, 6, 7, 0xFF)}, 0}, 108 {{SLP, SLP_TOUT(50), SLP_TOUT(100), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0}, 109 {{SLP, SLP_TOUT(50), SLP_TOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0}, 110 {{SLP, SLP_TOUT(25), SLP_TOUT(25), SLP_VEC(4, 7, 10, 10, 0xFF)}, 0} 111}; 112 113/* advance power management */ 114/* DTIM 0 - 2 */ 115static const struct iwl_power_vec_entry apm_range_0[IWL_POWER_NUM] = { 116 {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50), 117 SLP_VEC(1, 2, 4, 6, 0xFF), 0}, 0}, 118 {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50), 119 SLP_VEC(1, 2, 4, 6, 0xFF), 0}, 0}, 120 {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50), 121 SLP_VEC(1, 2, 4, 6, 0xFF), 0}, 0}, 122 {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50), 123 SLP_VEC(1, 2, 4, 6, 0xFF), 0}, 0}, 124 {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50), 125 SLP_VEC(1, 2, 6, 8, 0xFF), ASLP_TOUT(2)}, 2} 126}; 127 128 129/* for DTIM period IWL_DTIM_RANGE_0_MAX + 1 through IWL_DTIM_RANGE_1_MAX */ 130/* DTIM 3 - 10 */ 131static const struct iwl_power_vec_entry apm_range_1[IWL_POWER_NUM] = { 132 {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50), 133 SLP_VEC(1, 2, 4, 6, 0xFF), 0}, 0}, 134 {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50), 135 SLP_VEC(1, 2, 4, 6, 0xFF), 0}, 0}, 136 {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50), 137 SLP_VEC(1, 2, 4, 6, 0xFF), 0}, 0}, 138 {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50), 139 SLP_VEC(1, 2, 4, 6, 0xFF), 0}, 0}, 140 {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50), 141 SLP_VEC(1, 2, 6, 8, 0xFF), 0}, 2} 142}; 143 144/* for DTIM period > IWL_DTIM_RANGE_1_MAX */ 145/* DTIM 11 - */ 146static const struct iwl_power_vec_entry apm_range_2[IWL_POWER_NUM] = { 147 {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50), 148 SLP_VEC(1, 2, 4, 6, 0xFF), 0}, 0}, 149 {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50), 150 SLP_VEC(1, 2, 4, 6, 0xFF), 0}, 0}, 151 {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50), 152 SLP_VEC(1, 2, 4, 6, 0xFF), 0}, 0}, 153 {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50), 154 SLP_VEC(1, 2, 4, 6, 0xFF), 0}, 0}, 155 {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50), 156 SLP_VEC(1, 2, 6, 8, 0xFF), ASLP_TOUT(2)}, 2} 157}; 158 159static void iwl_static_sleep_cmd(struct iwl_priv *priv, 160 struct iwl_powertable_cmd *cmd, 161 enum iwl_power_level lvl, int period) 162{ 163 const struct iwl_power_vec_entry *table; 164 int max_sleep[IWL_POWER_VEC_SIZE] = { 0 }; 165 int i; 166 u8 skip; 167 u32 slp_itrvl; 168 169 if (priv->lib->adv_pm) { 170 table = apm_range_2; 171 if (period <= IWL_DTIM_RANGE_1_MAX) 172 table = apm_range_1; 173 if (period <= IWL_DTIM_RANGE_0_MAX) 174 table = apm_range_0; 175 } else { 176 table = range_2; 177 if (period <= IWL_DTIM_RANGE_1_MAX) 178 table = range_1; 179 if (period <= IWL_DTIM_RANGE_0_MAX) 180 table = range_0; 181 } 182 183 if (WARN_ON(lvl < 0 || lvl >= IWL_POWER_NUM)) 184 memset(cmd, 0, sizeof(*cmd)); 185 else 186 *cmd = table[lvl].cmd; 187 188 if (period == 0) { 189 skip = 0; 190 period = 1; 191 for (i = 0; i < IWL_POWER_VEC_SIZE; i++) 192 max_sleep[i] = 1; 193 194 } else { 195 skip = table[lvl].no_dtim; 196 for (i = 0; i < IWL_POWER_VEC_SIZE; i++) 197 max_sleep[i] = le32_to_cpu(cmd->sleep_interval[i]); 198 max_sleep[IWL_POWER_VEC_SIZE - 1] = skip + 1; 199 } 200 201 slp_itrvl = le32_to_cpu(cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1]); 202 /* figure out the listen interval based on dtim period and skip */ 203 if (slp_itrvl == 0xFF) 204 cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1] = 205 cpu_to_le32(period * (skip + 1)); 206 207 slp_itrvl = le32_to_cpu(cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1]); 208 if (slp_itrvl > period) 209 cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1] = 210 cpu_to_le32((slp_itrvl / period) * period); 211 212 if (skip) 213 cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK; 214 else 215 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK; 216 217 if (priv->cfg->base_params->shadow_reg_enable) 218 cmd->flags |= IWL_POWER_SHADOW_REG_ENA; 219 else 220 cmd->flags &= ~IWL_POWER_SHADOW_REG_ENA; 221 222 if (iwl_advanced_bt_coexist(priv)) { 223 if (!priv->lib->bt_params->bt_sco_disable) 224 cmd->flags |= IWL_POWER_BT_SCO_ENA; 225 else 226 cmd->flags &= ~IWL_POWER_BT_SCO_ENA; 227 } 228 229 230 slp_itrvl = le32_to_cpu(cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1]); 231 if (slp_itrvl > IWL_CONN_MAX_LISTEN_INTERVAL) 232 cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1] = 233 cpu_to_le32(IWL_CONN_MAX_LISTEN_INTERVAL); 234 235 /* enforce max sleep interval */ 236 for (i = IWL_POWER_VEC_SIZE - 1; i >= 0 ; i--) { 237 if (le32_to_cpu(cmd->sleep_interval[i]) > 238 (max_sleep[i] * period)) 239 cmd->sleep_interval[i] = 240 cpu_to_le32(max_sleep[i] * period); 241 if (i != (IWL_POWER_VEC_SIZE - 1)) { 242 if (le32_to_cpu(cmd->sleep_interval[i]) > 243 le32_to_cpu(cmd->sleep_interval[i+1])) 244 cmd->sleep_interval[i] = 245 cmd->sleep_interval[i+1]; 246 } 247 } 248 249 if (priv->power_data.bus_pm) 250 cmd->flags |= IWL_POWER_PCI_PM_MSK; 251 else 252 cmd->flags &= ~IWL_POWER_PCI_PM_MSK; 253 254 IWL_DEBUG_POWER(priv, "numSkipDtim = %u, dtimPeriod = %d\n", 255 skip, period); 256 /* The power level here is 0-4 (used as array index), but user expects 257 to see 1-5 (according to spec). */ 258 IWL_DEBUG_POWER(priv, "Sleep command for index %d\n", lvl + 1); 259} 260 261static void iwl_power_sleep_cam_cmd(struct iwl_priv *priv, 262 struct iwl_powertable_cmd *cmd) 263{ 264 memset(cmd, 0, sizeof(*cmd)); 265 266 if (priv->power_data.bus_pm) 267 cmd->flags |= IWL_POWER_PCI_PM_MSK; 268 269 IWL_DEBUG_POWER(priv, "Sleep command for CAM\n"); 270} 271 272static int iwl_set_power(struct iwl_priv *priv, struct iwl_powertable_cmd *cmd) 273{ 274 IWL_DEBUG_POWER(priv, "Sending power/sleep command\n"); 275 IWL_DEBUG_POWER(priv, "Flags value = 0x%08X\n", cmd->flags); 276 IWL_DEBUG_POWER(priv, "Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout)); 277 IWL_DEBUG_POWER(priv, "Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout)); 278 IWL_DEBUG_POWER(priv, "Sleep interval vector = { %d , %d , %d , %d , %d }\n", 279 le32_to_cpu(cmd->sleep_interval[0]), 280 le32_to_cpu(cmd->sleep_interval[1]), 281 le32_to_cpu(cmd->sleep_interval[2]), 282 le32_to_cpu(cmd->sleep_interval[3]), 283 le32_to_cpu(cmd->sleep_interval[4])); 284 285 return iwl_dvm_send_cmd_pdu(priv, POWER_TABLE_CMD, 0, 286 sizeof(struct iwl_powertable_cmd), cmd); 287} 288 289static void iwl_power_build_cmd(struct iwl_priv *priv, 290 struct iwl_powertable_cmd *cmd) 291{ 292 bool enabled = priv->hw->conf.flags & IEEE80211_CONF_PS; 293 int dtimper; 294 295 if (force_cam) { 296 iwl_power_sleep_cam_cmd(priv, cmd); 297 return; 298 } 299 300 dtimper = priv->hw->conf.ps_dtim_period ?: 1; 301 302 if (priv->wowlan) 303 iwl_static_sleep_cmd(priv, cmd, IWL_POWER_INDEX_5, dtimper); 304 else if (!priv->lib->no_idle_support && 305 priv->hw->conf.flags & IEEE80211_CONF_IDLE) 306 iwl_static_sleep_cmd(priv, cmd, IWL_POWER_INDEX_5, 20); 307 else if (iwl_tt_is_low_power_state(priv)) { 308 /* in thermal throttling low power state */ 309 iwl_static_sleep_cmd(priv, cmd, 310 iwl_tt_current_power_mode(priv), dtimper); 311 } else if (!enabled) 312 iwl_power_sleep_cam_cmd(priv, cmd); 313 else if (priv->power_data.debug_sleep_level_override >= 0) 314 iwl_static_sleep_cmd(priv, cmd, 315 priv->power_data.debug_sleep_level_override, 316 dtimper); 317 else { 318 /* Note that the user parameter is 1-5 (according to spec), 319 but we pass 0-4 because it acts as an array index. */ 320 if (iwlwifi_mod_params.power_level > IWL_POWER_INDEX_1 && 321 iwlwifi_mod_params.power_level <= IWL_POWER_NUM) 322 iwl_static_sleep_cmd(priv, cmd, 323 iwlwifi_mod_params.power_level - 1, dtimper); 324 else 325 iwl_static_sleep_cmd(priv, cmd, 326 IWL_POWER_INDEX_1, dtimper); 327 } 328} 329 330int iwl_power_set_mode(struct iwl_priv *priv, struct iwl_powertable_cmd *cmd, 331 bool force) 332{ 333 int ret; 334 bool update_chains; 335 336 lockdep_assert_held(&priv->mutex); 337 338 /* Don't update the RX chain when chain noise calibration is running */ 339 update_chains = priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE || 340 priv->chain_noise_data.state == IWL_CHAIN_NOISE_ALIVE; 341 342 if (!memcmp(&priv->power_data.sleep_cmd, cmd, sizeof(*cmd)) && !force) 343 return 0; 344 345 if (!iwl_is_ready_rf(priv)) 346 return -EIO; 347 348 /* scan complete use sleep_power_next, need to be updated */ 349 memcpy(&priv->power_data.sleep_cmd_next, cmd, sizeof(*cmd)); 350 if (test_bit(STATUS_SCANNING, &priv->status) && !force) { 351 IWL_DEBUG_INFO(priv, "Defer power set mode while scanning\n"); 352 return 0; 353 } 354 355 if (cmd->flags & IWL_POWER_DRIVER_ALLOW_SLEEP_MSK) 356 iwl_dvm_set_pmi(priv, true); 357 358 ret = iwl_set_power(priv, cmd); 359 if (!ret) { 360 if (!(cmd->flags & IWL_POWER_DRIVER_ALLOW_SLEEP_MSK)) 361 iwl_dvm_set_pmi(priv, false); 362 363 if (update_chains) 364 iwl_update_chain_flags(priv); 365 else 366 IWL_DEBUG_POWER(priv, 367 "Cannot update the power, chain noise " 368 "calibration running: %d\n", 369 priv->chain_noise_data.state); 370 371 memcpy(&priv->power_data.sleep_cmd, cmd, sizeof(*cmd)); 372 } else 373 IWL_ERR(priv, "set power fail, ret = %d\n", ret); 374 375 return ret; 376} 377 378int iwl_power_update_mode(struct iwl_priv *priv, bool force) 379{ 380 struct iwl_powertable_cmd cmd; 381 382 iwl_power_build_cmd(priv, &cmd); 383 return iwl_power_set_mode(priv, &cmd, force); 384} 385 386/* initialize to default */ 387void iwl_power_initialize(struct iwl_priv *priv) 388{ 389 priv->power_data.bus_pm = priv->trans->pm_support; 390 391 priv->power_data.debug_sleep_level_override = -1; 392 393 memset(&priv->power_data.sleep_cmd, 0, 394 sizeof(priv->power_data.sleep_cmd)); 395} 396