1 // SPDX-License-Identifier: GPL-2.0-only 2 /****************************************************************************** 3 * 4 * Copyright(c) 2007 - 2014 Intel Corporation. All rights reserved. 5 * Copyright (C) 2019 Intel Corporation 6 * 7 * Portions of this file are derived from the ipw3945 project, as well 8 * as portions of the ieee80211 subsystem header files. 9 * 10 * Contact Information: 11 * Intel Linux Wireless <linuxwifi@intel.com> 12 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 13 *****************************************************************************/ 14 15 16 #include <linux/kernel.h> 17 #include <linux/module.h> 18 #include <linux/slab.h> 19 #include <net/mac80211.h> 20 #include "iwl-io.h" 21 #include "iwl-debug.h" 22 #include "iwl-trans.h" 23 #include "iwl-modparams.h" 24 #include "dev.h" 25 #include "agn.h" 26 #include "commands.h" 27 #include "power.h" 28 29 static bool force_cam = true; 30 module_param(force_cam, bool, 0644); 31 MODULE_PARM_DESC(force_cam, "force continuously aware mode (no power saving at all)"); 32 33 /* 34 * Setting power level allows the card to go to sleep when not busy. 35 * 36 * We calculate a sleep command based on the required latency, which 37 * we get from mac80211. In order to handle thermal throttling, we can 38 * also use pre-defined power levels. 39 */ 40 41 /* 42 * This defines the old power levels. They are still used by default 43 * (level 1) and for thermal throttle (levels 3 through 5) 44 */ 45 46 struct iwl_power_vec_entry { 47 struct iwl_powertable_cmd cmd; 48 u8 no_dtim; /* number of skip dtim */ 49 }; 50 51 #define IWL_DTIM_RANGE_0_MAX 2 52 #define IWL_DTIM_RANGE_1_MAX 10 53 54 #define NOSLP cpu_to_le16(0), 0, 0 55 #define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK, 0, 0 56 #define ASLP (IWL_POWER_POWER_SAVE_ENA_MSK | \ 57 IWL_POWER_POWER_MANAGEMENT_ENA_MSK | \ 58 IWL_POWER_ADVANCE_PM_ENA_MSK) 59 #define ASLP_TOUT(T) cpu_to_le32(T) 60 #define TU_TO_USEC 1024 61 #define SLP_TOUT(T) cpu_to_le32((T) * TU_TO_USEC) 62 #define SLP_VEC(X0, X1, X2, X3, X4) {cpu_to_le32(X0), \ 63 cpu_to_le32(X1), \ 64 cpu_to_le32(X2), \ 65 cpu_to_le32(X3), \ 66 cpu_to_le32(X4)} 67 /* default power management (not Tx power) table values */ 68 /* for DTIM period 0 through IWL_DTIM_RANGE_0_MAX */ 69 /* DTIM 0 - 2 */ 70 static const struct iwl_power_vec_entry range_0[IWL_POWER_NUM] = { 71 {{SLP, SLP_TOUT(200), SLP_TOUT(500), SLP_VEC(1, 1, 2, 2, 0xFF)}, 0}, 72 {{SLP, SLP_TOUT(200), SLP_TOUT(300), SLP_VEC(1, 2, 2, 2, 0xFF)}, 0}, 73 {{SLP, SLP_TOUT(50), SLP_TOUT(100), SLP_VEC(2, 2, 2, 2, 0xFF)}, 0}, 74 {{SLP, SLP_TOUT(50), SLP_TOUT(25), SLP_VEC(2, 2, 4, 4, 0xFF)}, 1}, 75 {{SLP, SLP_TOUT(25), SLP_TOUT(25), SLP_VEC(2, 2, 4, 6, 0xFF)}, 2} 76 }; 77 78 79 /* for DTIM period IWL_DTIM_RANGE_0_MAX + 1 through IWL_DTIM_RANGE_1_MAX */ 80 /* DTIM 3 - 10 */ 81 static const struct iwl_power_vec_entry range_1[IWL_POWER_NUM] = { 82 {{SLP, SLP_TOUT(200), SLP_TOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0}, 83 {{SLP, SLP_TOUT(200), SLP_TOUT(300), SLP_VEC(1, 2, 3, 4, 7)}, 0}, 84 {{SLP, SLP_TOUT(50), SLP_TOUT(100), SLP_VEC(2, 4, 6, 7, 9)}, 0}, 85 {{SLP, SLP_TOUT(50), SLP_TOUT(25), SLP_VEC(2, 4, 6, 9, 10)}, 1}, 86 {{SLP, SLP_TOUT(25), SLP_TOUT(25), SLP_VEC(2, 4, 6, 10, 10)}, 2} 87 }; 88 89 /* for DTIM period > IWL_DTIM_RANGE_1_MAX */ 90 /* DTIM 11 - */ 91 static const struct iwl_power_vec_entry range_2[IWL_POWER_NUM] = { 92 {{SLP, SLP_TOUT(200), SLP_TOUT(500), SLP_VEC(1, 2, 3, 4, 0xFF)}, 0}, 93 {{SLP, SLP_TOUT(200), SLP_TOUT(300), SLP_VEC(2, 4, 6, 7, 0xFF)}, 0}, 94 {{SLP, SLP_TOUT(50), SLP_TOUT(100), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0}, 95 {{SLP, SLP_TOUT(50), SLP_TOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0}, 96 {{SLP, SLP_TOUT(25), SLP_TOUT(25), SLP_VEC(4, 7, 10, 10, 0xFF)}, 0} 97 }; 98 99 /* advance power management */ 100 /* DTIM 0 - 2 */ 101 static const struct iwl_power_vec_entry apm_range_0[IWL_POWER_NUM] = { 102 {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50), 103 SLP_VEC(1, 2, 4, 6, 0xFF), 0}, 0}, 104 {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50), 105 SLP_VEC(1, 2, 4, 6, 0xFF), 0}, 0}, 106 {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50), 107 SLP_VEC(1, 2, 4, 6, 0xFF), 0}, 0}, 108 {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50), 109 SLP_VEC(1, 2, 4, 6, 0xFF), 0}, 0}, 110 {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50), 111 SLP_VEC(1, 2, 6, 8, 0xFF), ASLP_TOUT(2)}, 2} 112 }; 113 114 115 /* for DTIM period IWL_DTIM_RANGE_0_MAX + 1 through IWL_DTIM_RANGE_1_MAX */ 116 /* DTIM 3 - 10 */ 117 static const struct iwl_power_vec_entry apm_range_1[IWL_POWER_NUM] = { 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, 4, 6, 0xFF), 0}, 0}, 126 {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50), 127 SLP_VEC(1, 2, 6, 8, 0xFF), 0}, 2} 128 }; 129 130 /* for DTIM period > IWL_DTIM_RANGE_1_MAX */ 131 /* DTIM 11 - */ 132 static const struct iwl_power_vec_entry apm_range_2[IWL_POWER_NUM] = { 133 {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50), 134 SLP_VEC(1, 2, 4, 6, 0xFF), 0}, 0}, 135 {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50), 136 SLP_VEC(1, 2, 4, 6, 0xFF), 0}, 0}, 137 {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50), 138 SLP_VEC(1, 2, 4, 6, 0xFF), 0}, 0}, 139 {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50), 140 SLP_VEC(1, 2, 4, 6, 0xFF), 0}, 0}, 141 {{ASLP, 0, 0, ASLP_TOUT(50), ASLP_TOUT(50), 142 SLP_VEC(1, 2, 6, 8, 0xFF), ASLP_TOUT(2)}, 2} 143 }; 144 145 static void iwl_static_sleep_cmd(struct iwl_priv *priv, 146 struct iwl_powertable_cmd *cmd, 147 enum iwl_power_level lvl, int period) 148 { 149 const struct iwl_power_vec_entry *table; 150 int max_sleep[IWL_POWER_VEC_SIZE] = { 0 }; 151 int i; 152 u8 skip; 153 u32 slp_itrvl; 154 155 if (priv->lib->adv_pm) { 156 table = apm_range_2; 157 if (period <= IWL_DTIM_RANGE_1_MAX) 158 table = apm_range_1; 159 if (period <= IWL_DTIM_RANGE_0_MAX) 160 table = apm_range_0; 161 } else { 162 table = range_2; 163 if (period <= IWL_DTIM_RANGE_1_MAX) 164 table = range_1; 165 if (period <= IWL_DTIM_RANGE_0_MAX) 166 table = range_0; 167 } 168 169 if (WARN_ON(lvl < 0 || lvl >= IWL_POWER_NUM)) 170 memset(cmd, 0, sizeof(*cmd)); 171 else 172 *cmd = table[lvl].cmd; 173 174 if (period == 0) { 175 skip = 0; 176 period = 1; 177 for (i = 0; i < IWL_POWER_VEC_SIZE; i++) 178 max_sleep[i] = 1; 179 180 } else { 181 skip = table[lvl].no_dtim; 182 for (i = 0; i < IWL_POWER_VEC_SIZE; i++) 183 max_sleep[i] = le32_to_cpu(cmd->sleep_interval[i]); 184 max_sleep[IWL_POWER_VEC_SIZE - 1] = skip + 1; 185 } 186 187 slp_itrvl = le32_to_cpu(cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1]); 188 /* figure out the listen interval based on dtim period and skip */ 189 if (slp_itrvl == 0xFF) 190 cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1] = 191 cpu_to_le32(period * (skip + 1)); 192 193 slp_itrvl = le32_to_cpu(cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1]); 194 if (slp_itrvl > period) 195 cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1] = 196 cpu_to_le32((slp_itrvl / period) * period); 197 198 if (skip) 199 cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK; 200 else 201 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK; 202 203 if (priv->trans->trans_cfg->base_params->shadow_reg_enable) 204 cmd->flags |= IWL_POWER_SHADOW_REG_ENA; 205 else 206 cmd->flags &= ~IWL_POWER_SHADOW_REG_ENA; 207 208 if (iwl_advanced_bt_coexist(priv)) { 209 if (!priv->lib->bt_params->bt_sco_disable) 210 cmd->flags |= IWL_POWER_BT_SCO_ENA; 211 else 212 cmd->flags &= ~IWL_POWER_BT_SCO_ENA; 213 } 214 215 216 slp_itrvl = le32_to_cpu(cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1]); 217 if (slp_itrvl > IWL_CONN_MAX_LISTEN_INTERVAL) 218 cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1] = 219 cpu_to_le32(IWL_CONN_MAX_LISTEN_INTERVAL); 220 221 /* enforce max sleep interval */ 222 for (i = IWL_POWER_VEC_SIZE - 1; i >= 0 ; i--) { 223 if (le32_to_cpu(cmd->sleep_interval[i]) > 224 (max_sleep[i] * period)) 225 cmd->sleep_interval[i] = 226 cpu_to_le32(max_sleep[i] * period); 227 if (i != (IWL_POWER_VEC_SIZE - 1)) { 228 if (le32_to_cpu(cmd->sleep_interval[i]) > 229 le32_to_cpu(cmd->sleep_interval[i+1])) 230 cmd->sleep_interval[i] = 231 cmd->sleep_interval[i+1]; 232 } 233 } 234 235 if (priv->power_data.bus_pm) 236 cmd->flags |= IWL_POWER_PCI_PM_MSK; 237 else 238 cmd->flags &= ~IWL_POWER_PCI_PM_MSK; 239 240 IWL_DEBUG_POWER(priv, "numSkipDtim = %u, dtimPeriod = %d\n", 241 skip, period); 242 /* The power level here is 0-4 (used as array index), but user expects 243 to see 1-5 (according to spec). */ 244 IWL_DEBUG_POWER(priv, "Sleep command for index %d\n", lvl + 1); 245 } 246 247 static void iwl_power_sleep_cam_cmd(struct iwl_priv *priv, 248 struct iwl_powertable_cmd *cmd) 249 { 250 memset(cmd, 0, sizeof(*cmd)); 251 252 if (priv->power_data.bus_pm) 253 cmd->flags |= IWL_POWER_PCI_PM_MSK; 254 255 IWL_DEBUG_POWER(priv, "Sleep command for CAM\n"); 256 } 257 258 static int iwl_set_power(struct iwl_priv *priv, struct iwl_powertable_cmd *cmd) 259 { 260 IWL_DEBUG_POWER(priv, "Sending power/sleep command\n"); 261 IWL_DEBUG_POWER(priv, "Flags value = 0x%08X\n", cmd->flags); 262 IWL_DEBUG_POWER(priv, "Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout)); 263 IWL_DEBUG_POWER(priv, "Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout)); 264 IWL_DEBUG_POWER(priv, "Sleep interval vector = { %d , %d , %d , %d , %d }\n", 265 le32_to_cpu(cmd->sleep_interval[0]), 266 le32_to_cpu(cmd->sleep_interval[1]), 267 le32_to_cpu(cmd->sleep_interval[2]), 268 le32_to_cpu(cmd->sleep_interval[3]), 269 le32_to_cpu(cmd->sleep_interval[4])); 270 271 return iwl_dvm_send_cmd_pdu(priv, POWER_TABLE_CMD, 0, 272 sizeof(struct iwl_powertable_cmd), cmd); 273 } 274 275 static void iwl_power_build_cmd(struct iwl_priv *priv, 276 struct iwl_powertable_cmd *cmd) 277 { 278 bool enabled = priv->hw->conf.flags & IEEE80211_CONF_PS; 279 int dtimper; 280 281 if (force_cam) { 282 iwl_power_sleep_cam_cmd(priv, cmd); 283 return; 284 } 285 286 dtimper = priv->hw->conf.ps_dtim_period ?: 1; 287 288 if (priv->wowlan) 289 iwl_static_sleep_cmd(priv, cmd, IWL_POWER_INDEX_5, dtimper); 290 else if (!priv->lib->no_idle_support && 291 priv->hw->conf.flags & IEEE80211_CONF_IDLE) 292 iwl_static_sleep_cmd(priv, cmd, IWL_POWER_INDEX_5, 20); 293 else if (iwl_tt_is_low_power_state(priv)) { 294 /* in thermal throttling low power state */ 295 iwl_static_sleep_cmd(priv, cmd, 296 iwl_tt_current_power_mode(priv), dtimper); 297 } else if (!enabled) 298 iwl_power_sleep_cam_cmd(priv, cmd); 299 else if (priv->power_data.debug_sleep_level_override >= 0) 300 iwl_static_sleep_cmd(priv, cmd, 301 priv->power_data.debug_sleep_level_override, 302 dtimper); 303 else { 304 /* Note that the user parameter is 1-5 (according to spec), 305 but we pass 0-4 because it acts as an array index. */ 306 if (iwlwifi_mod_params.power_level > IWL_POWER_INDEX_1 && 307 iwlwifi_mod_params.power_level <= IWL_POWER_NUM) 308 iwl_static_sleep_cmd(priv, cmd, 309 iwlwifi_mod_params.power_level - 1, dtimper); 310 else 311 iwl_static_sleep_cmd(priv, cmd, 312 IWL_POWER_INDEX_1, dtimper); 313 } 314 } 315 316 int iwl_power_set_mode(struct iwl_priv *priv, struct iwl_powertable_cmd *cmd, 317 bool force) 318 { 319 int ret; 320 bool update_chains; 321 322 lockdep_assert_held(&priv->mutex); 323 324 /* Don't update the RX chain when chain noise calibration is running */ 325 update_chains = priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE || 326 priv->chain_noise_data.state == IWL_CHAIN_NOISE_ALIVE; 327 328 if (!memcmp(&priv->power_data.sleep_cmd, cmd, sizeof(*cmd)) && !force) 329 return 0; 330 331 if (!iwl_is_ready_rf(priv)) 332 return -EIO; 333 334 /* scan complete use sleep_power_next, need to be updated */ 335 memcpy(&priv->power_data.sleep_cmd_next, cmd, sizeof(*cmd)); 336 if (test_bit(STATUS_SCANNING, &priv->status) && !force) { 337 IWL_DEBUG_INFO(priv, "Defer power set mode while scanning\n"); 338 return 0; 339 } 340 341 if (cmd->flags & IWL_POWER_DRIVER_ALLOW_SLEEP_MSK) 342 iwl_dvm_set_pmi(priv, true); 343 344 ret = iwl_set_power(priv, cmd); 345 if (!ret) { 346 if (!(cmd->flags & IWL_POWER_DRIVER_ALLOW_SLEEP_MSK)) 347 iwl_dvm_set_pmi(priv, false); 348 349 if (update_chains) 350 iwl_update_chain_flags(priv); 351 else 352 IWL_DEBUG_POWER(priv, 353 "Cannot update the power, chain noise " 354 "calibration running: %d\n", 355 priv->chain_noise_data.state); 356 357 memcpy(&priv->power_data.sleep_cmd, cmd, sizeof(*cmd)); 358 } else 359 IWL_ERR(priv, "set power fail, ret = %d\n", ret); 360 361 return ret; 362 } 363 364 int iwl_power_update_mode(struct iwl_priv *priv, bool force) 365 { 366 struct iwl_powertable_cmd cmd; 367 368 iwl_power_build_cmd(priv, &cmd); 369 return iwl_power_set_mode(priv, &cmd, force); 370 } 371 372 /* initialize to default */ 373 void iwl_power_initialize(struct iwl_priv *priv) 374 { 375 priv->power_data.bus_pm = priv->trans->pm_support; 376 377 priv->power_data.debug_sleep_level_override = -1; 378 379 memset(&priv->power_data.sleep_cmd, 0, 380 sizeof(priv->power_data.sleep_cmd)); 381 } 382