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