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  * 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 }