drivers/net/wireless/iwlwifi/mvm/power.c

   1 /******************************************************************************
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   4  * redistributing this file, you may do so under either license.
   5  *
   6  * GPL LICENSE SUMMARY
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   8  * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
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  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of version 2 of the GNU General Public License as
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  17  * General Public License for more details.
  18  *
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  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  22  * USA
  23  *
  24  * The full GNU General Public License is included in this distribution
  25  * in the file called COPYING.
  26  *
  27  * Contact Information:
  28  *  Intel Linux Wireless <ilw@linux.intel.com>
  29  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  30  *
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  33  * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
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  48  *    from this software without specific prior written permission.
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  50  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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  60  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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  62  *****************************************************************************/
  63
  64 #include <linux/kernel.h>
  65 #include <linux/module.h>
  66 #include <linux/slab.h>
  67 #include <linux/init.h>
  68
  69 #include <net/mac80211.h>
  70
  71 #include "iwl-debug.h"
  72 #include "mvm.h"
  73 #include "iwl-modparams.h"
  74 #include "fw-api-power.h"
  75
  76 #define POWER_KEEP_ALIVE_PERIOD_SEC    25
  77
  78 static int iwl_mvm_beacon_filter_send_cmd(struct iwl_mvm *mvm,
  79                                           struct iwl_beacon_filter_cmd *cmd)
  80 {
  81         int ret;
  82
  83         ret = iwl_mvm_send_cmd_pdu(mvm, REPLY_BEACON_FILTERING_CMD, CMD_SYNC,
  84                                    sizeof(struct iwl_beacon_filter_cmd), cmd);
  85
  86         if (!ret) {
  87                 IWL_DEBUG_POWER(mvm, "ba_enable_beacon_abort is: %d\n",
  88                                 cmd->ba_enable_beacon_abort);
  89                 IWL_DEBUG_POWER(mvm, "ba_escape_timer is: %d\n",
  90                                 cmd->ba_escape_timer);
  91                 IWL_DEBUG_POWER(mvm, "bf_debug_flag is: %d\n",
  92                                 cmd->bf_debug_flag);
  93                 IWL_DEBUG_POWER(mvm, "bf_enable_beacon_filter is: %d\n",
  94                                 cmd->bf_enable_beacon_filter);
  95                 IWL_DEBUG_POWER(mvm, "bf_energy_delta is: %d\n",
  96                                 cmd->bf_energy_delta);
  97                 IWL_DEBUG_POWER(mvm, "bf_escape_timer is: %d\n",
  98                                 cmd->bf_escape_timer);
  99                 IWL_DEBUG_POWER(mvm, "bf_roaming_energy_delta is: %d\n",
 100                                 cmd->bf_roaming_energy_delta);
 101                 IWL_DEBUG_POWER(mvm, "bf_roaming_state is: %d\n",
 102                                 cmd->bf_roaming_state);
 103                 IWL_DEBUG_POWER(mvm, "bf_temperature_delta is: %d\n",
 104                                 cmd->bf_temperature_delta);
 105         }
 106         return ret;
 107 }
 108
 109 static int iwl_mvm_update_beacon_abort(struct iwl_mvm *mvm,
 110                                        struct ieee80211_vif *vif, bool enable)
 111 {
 112         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 113         struct iwl_beacon_filter_cmd cmd = {
 114                 IWL_BF_CMD_CONFIG_DEFAULTS,
 115                 .bf_enable_beacon_filter = 1,
 116                 .ba_enable_beacon_abort = enable,
 117         };
 118
 119         if (!mvmvif->bf_enabled)
 120                 return 0;
 121
 122         iwl_mvm_beacon_filter_debugfs_parameters(vif, &cmd);
 123         return iwl_mvm_beacon_filter_send_cmd(mvm, &cmd);
 124 }
 125
 126 static void iwl_mvm_power_log(struct iwl_mvm *mvm,
 127                               struct iwl_powertable_cmd *cmd)
 128 {
 129         IWL_DEBUG_POWER(mvm,
 130                         "Sending power table command for power level %d, flags = 0x%X\n",
 131                         iwlmvm_mod_params.power_scheme,
 132                         le16_to_cpu(cmd->flags));
 133         IWL_DEBUG_POWER(mvm, "Keep alive = %u sec\n", cmd->keep_alive_seconds);
 134
 135         if (cmd->flags & cpu_to_le16(POWER_FLAGS_POWER_MANAGEMENT_ENA_MSK)) {
 136                 IWL_DEBUG_POWER(mvm, "Rx timeout = %u usec\n",
 137                                 le32_to_cpu(cmd->rx_data_timeout));
 138                 IWL_DEBUG_POWER(mvm, "Tx timeout = %u usec\n",
 139                                 le32_to_cpu(cmd->tx_data_timeout));
 140                 IWL_DEBUG_POWER(mvm, "LP RX RSSI threshold = %u\n",
 141                                 cmd->lprx_rssi_threshold);
 142                 if (cmd->flags & cpu_to_le16(POWER_FLAGS_SKIP_OVER_DTIM_MSK))
 143                         IWL_DEBUG_POWER(mvm, "DTIM periods to skip = %u\n",
 144                                         le32_to_cpu(cmd->skip_dtim_periods));
 145         }
 146 }
 147
 148 void iwl_mvm_power_build_cmd(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 149                              struct iwl_powertable_cmd *cmd)
 150 {
 151         struct ieee80211_hw *hw = mvm->hw;
 152         struct ieee80211_chanctx_conf *chanctx_conf;
 153         struct ieee80211_channel *chan;
 154         int dtimper, dtimper_msec;
 155         int keep_alive;
 156         bool radar_detect = false;
 157         struct iwl_mvm_vif *mvmvif __maybe_unused =
 158                 iwl_mvm_vif_from_mac80211(vif);
 159
 160         /*
 161          * Regardless of power management state the driver must set
 162          * keep alive period. FW will use it for sending keep alive NDPs
 163          * immediately after association.
 164          */
 165         cmd->keep_alive_seconds = POWER_KEEP_ALIVE_PERIOD_SEC;
 166
 167         if (iwlmvm_mod_params.power_scheme == IWL_POWER_SCHEME_CAM)
 168                 return;
 169
 170         cmd->flags |= cpu_to_le16(POWER_FLAGS_POWER_SAVE_ENA_MSK);
 171         if (!vif->bss_conf.assoc)
 172                 cmd->flags |= cpu_to_le16(POWER_FLAGS_POWER_MANAGEMENT_ENA_MSK);
 173
 174 #ifdef CONFIG_IWLWIFI_DEBUGFS
 175         if (mvmvif->dbgfs_pm.mask & MVM_DEBUGFS_PM_DISABLE_POWER_OFF &&
 176             mvmvif->dbgfs_pm.disable_power_off)
 177                 cmd->flags &= cpu_to_le16(~POWER_FLAGS_POWER_SAVE_ENA_MSK);
 178 #endif
 179         if (!vif->bss_conf.ps)
 180                 return;
 181
 182         cmd->flags |= cpu_to_le16(POWER_FLAGS_POWER_MANAGEMENT_ENA_MSK);
 183
 184         dtimper = hw->conf.ps_dtim_period ?: 1;
 185
 186         /* Check if radar detection is required on current channel */
 187         rcu_read_lock();
 188         chanctx_conf = rcu_dereference(vif->chanctx_conf);
 189         WARN_ON(!chanctx_conf);
 190         if (chanctx_conf) {
 191                 chan = chanctx_conf->def.chan;
 192                 radar_detect = chan->flags & IEEE80211_CHAN_RADAR;
 193         }
 194         rcu_read_unlock();
 195
 196         /* Check skip over DTIM conditions */
 197         if (!radar_detect && (dtimper <= 10) &&
 198             (iwlmvm_mod_params.power_scheme == IWL_POWER_SCHEME_LP ||
 199              mvm->cur_ucode == IWL_UCODE_WOWLAN)) {
 200                 cmd->flags |= cpu_to_le16(POWER_FLAGS_SKIP_OVER_DTIM_MSK);
 201                 cmd->skip_dtim_periods = cpu_to_le32(3);
 202         }
 203
 204         /* Check that keep alive period is at least 3 * DTIM */
 205         dtimper_msec = dtimper * vif->bss_conf.beacon_int;
 206         keep_alive = max_t(int, 3 * dtimper_msec,
 207                            MSEC_PER_SEC * cmd->keep_alive_seconds);
 208         keep_alive = DIV_ROUND_UP(keep_alive, MSEC_PER_SEC);
 209         cmd->keep_alive_seconds = keep_alive;
 210
 211         if (mvm->cur_ucode != IWL_UCODE_WOWLAN) {
 212                 cmd->rx_data_timeout = cpu_to_le32(100 * USEC_PER_MSEC);
 213                 cmd->tx_data_timeout = cpu_to_le32(100 * USEC_PER_MSEC);
 214         } else {
 215                 cmd->rx_data_timeout = cpu_to_le32(10 * USEC_PER_MSEC);
 216                 cmd->tx_data_timeout = cpu_to_le32(10 * USEC_PER_MSEC);
 217         }
 218
 219 #ifdef CONFIG_IWLWIFI_DEBUGFS
 220         if (mvmvif->dbgfs_pm.mask & MVM_DEBUGFS_PM_KEEP_ALIVE)
 221                 cmd->keep_alive_seconds = mvmvif->dbgfs_pm.keep_alive_seconds;
 222         if (mvmvif->dbgfs_pm.mask & MVM_DEBUGFS_PM_SKIP_OVER_DTIM) {
 223                 if (mvmvif->dbgfs_pm.skip_over_dtim)
 224                         cmd->flags |=
 225                                 cpu_to_le16(POWER_FLAGS_SKIP_OVER_DTIM_MSK);
 226                 else
 227                         cmd->flags &=
 228                                 cpu_to_le16(~POWER_FLAGS_SKIP_OVER_DTIM_MSK);
 229         }
 230         if (mvmvif->dbgfs_pm.mask & MVM_DEBUGFS_PM_RX_DATA_TIMEOUT)
 231                 cmd->rx_data_timeout =
 232                         cpu_to_le32(mvmvif->dbgfs_pm.rx_data_timeout);
 233         if (mvmvif->dbgfs_pm.mask & MVM_DEBUGFS_PM_TX_DATA_TIMEOUT)
 234                 cmd->tx_data_timeout =
 235                         cpu_to_le32(mvmvif->dbgfs_pm.tx_data_timeout);
 236         if (mvmvif->dbgfs_pm.mask & MVM_DEBUGFS_PM_SKIP_DTIM_PERIODS)
 237                 cmd->skip_dtim_periods =
 238                         cpu_to_le32(mvmvif->dbgfs_pm.skip_dtim_periods);
 239 #endif /* CONFIG_IWLWIFI_DEBUGFS */
 240 }
 241
 242 int iwl_mvm_power_update_mode(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 243 {
 244         int ret;
 245         bool ba_enable;
 246         struct iwl_powertable_cmd cmd = {};
 247
 248         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p)
 249                 return 0;
 250
 251         /*
 252          * TODO: The following vif_count verification is temporary condition.
 253          * Avoid power mode update if more than one interface is currently
 254          * active. Remove this condition when FW will support power management
 255          * on multiple MACs.
 256          */
 257         IWL_DEBUG_POWER(mvm, "Currently %d interfaces active\n",
 258                         mvm->vif_count);
 259         if (mvm->vif_count > 1)
 260                 return 0;
 261
 262         iwl_mvm_power_build_cmd(mvm, vif, &cmd);
 263         iwl_mvm_power_log(mvm, &cmd);
 264
 265         ret = iwl_mvm_send_cmd_pdu(mvm, POWER_TABLE_CMD, CMD_SYNC,
 266                                    sizeof(cmd), &cmd);
 267         if (ret)
 268                 return ret;
 269
 270         ba_enable = !!(cmd.flags &
 271                        cpu_to_le16(POWER_FLAGS_POWER_MANAGEMENT_ENA_MSK));
 272
 273         return iwl_mvm_update_beacon_abort(mvm, vif, ba_enable);
 274 }
 275
 276 int iwl_mvm_power_disable(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 277 {
 278         struct iwl_powertable_cmd cmd = {};
 279         struct iwl_mvm_vif *mvmvif __maybe_unused =
 280                 iwl_mvm_vif_from_mac80211(vif);
 281
 282         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p)
 283                 return 0;
 284
 285         if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
 286                 cmd.flags |= cpu_to_le16(POWER_FLAGS_POWER_SAVE_ENA_MSK);
 287
 288 #ifdef CONFIG_IWLWIFI_DEBUGFS
 289         if (mvmvif->dbgfs_pm.mask & MVM_DEBUGFS_PM_DISABLE_POWER_OFF &&
 290             mvmvif->dbgfs_pm.disable_power_off)
 291                 cmd.flags &= cpu_to_le16(~POWER_FLAGS_POWER_SAVE_ENA_MSK);
 292 #endif
 293         iwl_mvm_power_log(mvm, &cmd);
 294
 295         return iwl_mvm_send_cmd_pdu(mvm, POWER_TABLE_CMD, CMD_ASYNC,
 296                                     sizeof(cmd), &cmd);
 297 }
 298
 299 #ifdef CONFIG_IWLWIFI_DEBUGFS
 300 void
 301 iwl_mvm_beacon_filter_debugfs_parameters(struct ieee80211_vif *vif,
 302                                          struct iwl_beacon_filter_cmd *cmd)
 303 {
 304         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 305         struct iwl_dbgfs_bf *dbgfs_bf = &mvmvif->dbgfs_bf;
 306
 307         if (dbgfs_bf->mask & MVM_DEBUGFS_BF_ENERGY_DELTA)
 308                 cmd->bf_energy_delta = dbgfs_bf->bf_energy_delta;
 309         if (dbgfs_bf->mask & MVM_DEBUGFS_BF_ROAMING_ENERGY_DELTA)
 310                 cmd->bf_roaming_energy_delta =
 311                                  dbgfs_bf->bf_roaming_energy_delta;
 312         if (dbgfs_bf->mask & MVM_DEBUGFS_BF_ROAMING_STATE)
 313                 cmd->bf_roaming_state = dbgfs_bf->bf_roaming_state;
 314         if (dbgfs_bf->mask & MVM_DEBUGFS_BF_TEMPERATURE_DELTA)
 315                 cmd->bf_temperature_delta = dbgfs_bf->bf_temperature_delta;
 316         if (dbgfs_bf->mask & MVM_DEBUGFS_BF_DEBUG_FLAG)
 317                 cmd->bf_debug_flag = dbgfs_bf->bf_debug_flag;
 318         if (dbgfs_bf->mask & MVM_DEBUGFS_BF_ESCAPE_TIMER)
 319                 cmd->bf_escape_timer = cpu_to_le32(dbgfs_bf->bf_escape_timer);
 320         if (dbgfs_bf->mask & MVM_DEBUGFS_BA_ESCAPE_TIMER)
 321                 cmd->ba_escape_timer = cpu_to_le32(dbgfs_bf->ba_escape_timer);
 322         if (dbgfs_bf->mask & MVM_DEBUGFS_BA_ENABLE_BEACON_ABORT)
 323                 cmd->ba_enable_beacon_abort = dbgfs_bf->ba_enable_beacon_abort;
 324 }
 325 #endif
 326
 327 int iwl_mvm_enable_beacon_filter(struct iwl_mvm *mvm,
 328                                  struct ieee80211_vif *vif)
 329 {
 330         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 331         struct iwl_beacon_filter_cmd cmd = {
 332                 IWL_BF_CMD_CONFIG_DEFAULTS,
 333                 .bf_enable_beacon_filter = 1,
 334         };
 335         int ret;
 336
 337         if (mvmvif != mvm->bf_allowed_vif ||
 338             vif->type != NL80211_IFTYPE_STATION || vif->p2p)
 339                 return 0;
 340
 341         iwl_mvm_beacon_filter_debugfs_parameters(vif, &cmd);
 342         ret = iwl_mvm_beacon_filter_send_cmd(mvm, &cmd);
 343
 344         if (!ret)
 345                 mvmvif->bf_enabled = true;
 346
 347         return ret;
 348 }
 349
 350 int iwl_mvm_disable_beacon_filter(struct iwl_mvm *mvm,
 351                                   struct ieee80211_vif *vif)
 352 {
 353         struct iwl_beacon_filter_cmd cmd = {};
 354         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 355         int ret;
 356
 357         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p)
 358                 return 0;
 359
 360         ret = iwl_mvm_beacon_filter_send_cmd(mvm, &cmd);
 361
 362         if (!ret)
 363                 mvmvif->bf_enabled = false;
 364
 365         return ret;
 366 }