drivers/net/wireless/intel/iwlwifi/dvm/power.c

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