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
   7  *
   8  * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
   9  *
  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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  15  * WITHOUT ANY WARRANTY; without even the implied warranty of
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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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  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                 if (cmd->flags & cpu_to_le16(POWER_FLAGS_SKIP_OVER_DTIM_MSK))
 141                         IWL_DEBUG_POWER(mvm, "DTIM periods to skip = %u\n",
 142                                         le32_to_cpu(cmd->skip_dtim_periods));
 143                 if (cmd->flags & cpu_to_le16(POWER_FLAGS_LPRX_ENA_MSK))
 144                         IWL_DEBUG_POWER(mvm, "LP RX RSSI threshold = %u\n",
 145                                         le32_to_cpu(cmd->lprx_rssi_threshold));
 146         }
 147 }
 148
 149 void iwl_mvm_power_build_cmd(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 150                              struct iwl_powertable_cmd *cmd)
 151 {
 152         struct ieee80211_hw *hw = mvm->hw;
 153         struct ieee80211_chanctx_conf *chanctx_conf;
 154         struct ieee80211_channel *chan;
 155         int dtimper, dtimper_msec;
 156         int keep_alive;
 157         bool radar_detect = false;
 158         struct iwl_mvm_vif *mvmvif __maybe_unused =
 159                 iwl_mvm_vif_from_mac80211(vif);
 160
 161         /*
 162          * Regardless of power management state the driver must set
 163          * keep alive period. FW will use it for sending keep alive NDPs
 164          * immediately after association.
 165          */
 166         cmd->keep_alive_seconds = POWER_KEEP_ALIVE_PERIOD_SEC;
 167
 168         if (iwlmvm_mod_params.power_scheme == IWL_POWER_SCHEME_CAM)
 169                 return;
 170
 171         cmd->flags |= cpu_to_le16(POWER_FLAGS_POWER_SAVE_ENA_MSK);
 172         if (!vif->bss_conf.assoc)
 173                 cmd->flags |= cpu_to_le16(POWER_FLAGS_POWER_MANAGEMENT_ENA_MSK);
 174
 175 #ifdef CONFIG_IWLWIFI_DEBUGFS
 176         if (mvmvif->dbgfs_pm.mask & MVM_DEBUGFS_PM_DISABLE_POWER_OFF &&
 177             mvmvif->dbgfs_pm.disable_power_off)
 178                 cmd->flags &= cpu_to_le16(~POWER_FLAGS_POWER_SAVE_ENA_MSK);
 179 #endif
 180         if (!vif->bss_conf.ps)
 181                 return;
 182
 183         cmd->flags |= cpu_to_le16(POWER_FLAGS_POWER_MANAGEMENT_ENA_MSK);
 184
 185         if (vif->bss_conf.beacon_rate &&
 186             (vif->bss_conf.beacon_rate->bitrate == 10 ||
 187              vif->bss_conf.beacon_rate->bitrate == 60)) {
 188                 cmd->flags |= cpu_to_le16(POWER_FLAGS_LPRX_ENA_MSK);
 189                 cmd->lprx_rssi_threshold =
 190                         cpu_to_le32(POWER_LPRX_RSSI_THRESHOLD);
 191         }
 192
 193         dtimper = hw->conf.ps_dtim_period ?: 1;
 194
 195         /* Check if radar detection is required on current channel */
 196         rcu_read_lock();
 197         chanctx_conf = rcu_dereference(vif->chanctx_conf);
 198         WARN_ON(!chanctx_conf);
 199         if (chanctx_conf) {
 200                 chan = chanctx_conf->def.chan;
 201                 radar_detect = chan->flags & IEEE80211_CHAN_RADAR;
 202         }
 203         rcu_read_unlock();
 204
 205         /* Check skip over DTIM conditions */
 206         if (!radar_detect && (dtimper <= 10) &&
 207             (iwlmvm_mod_params.power_scheme == IWL_POWER_SCHEME_LP ||
 208              mvm->cur_ucode == IWL_UCODE_WOWLAN)) {
 209                 cmd->flags |= cpu_to_le16(POWER_FLAGS_SKIP_OVER_DTIM_MSK);
 210                 cmd->skip_dtim_periods = cpu_to_le32(3);
 211         }
 212
 213         /* Check that keep alive period is at least 3 * DTIM */
 214         dtimper_msec = dtimper * vif->bss_conf.beacon_int;
 215         keep_alive = max_t(int, 3 * dtimper_msec,
 216                            MSEC_PER_SEC * cmd->keep_alive_seconds);
 217         keep_alive = DIV_ROUND_UP(keep_alive, MSEC_PER_SEC);
 218         cmd->keep_alive_seconds = keep_alive;
 219
 220         if (mvm->cur_ucode != IWL_UCODE_WOWLAN) {
 221                 cmd->rx_data_timeout = cpu_to_le32(100 * USEC_PER_MSEC);
 222                 cmd->tx_data_timeout = cpu_to_le32(100 * USEC_PER_MSEC);
 223         } else {
 224                 cmd->rx_data_timeout = cpu_to_le32(10 * USEC_PER_MSEC);
 225                 cmd->tx_data_timeout = cpu_to_le32(10 * USEC_PER_MSEC);
 226         }
 227
 228 #ifdef CONFIG_IWLWIFI_DEBUGFS
 229         if (mvmvif->dbgfs_pm.mask & MVM_DEBUGFS_PM_KEEP_ALIVE)
 230                 cmd->keep_alive_seconds = mvmvif->dbgfs_pm.keep_alive_seconds;
 231         if (mvmvif->dbgfs_pm.mask & MVM_DEBUGFS_PM_SKIP_OVER_DTIM) {
 232                 if (mvmvif->dbgfs_pm.skip_over_dtim)
 233                         cmd->flags |=
 234                                 cpu_to_le16(POWER_FLAGS_SKIP_OVER_DTIM_MSK);
 235                 else
 236                         cmd->flags &=
 237                                 cpu_to_le16(~POWER_FLAGS_SKIP_OVER_DTIM_MSK);
 238         }
 239         if (mvmvif->dbgfs_pm.mask & MVM_DEBUGFS_PM_RX_DATA_TIMEOUT)
 240                 cmd->rx_data_timeout =
 241                         cpu_to_le32(mvmvif->dbgfs_pm.rx_data_timeout);
 242         if (mvmvif->dbgfs_pm.mask & MVM_DEBUGFS_PM_TX_DATA_TIMEOUT)
 243                 cmd->tx_data_timeout =
 244                         cpu_to_le32(mvmvif->dbgfs_pm.tx_data_timeout);
 245         if (mvmvif->dbgfs_pm.mask & MVM_DEBUGFS_PM_SKIP_DTIM_PERIODS)
 246                 cmd->skip_dtim_periods =
 247                         cpu_to_le32(mvmvif->dbgfs_pm.skip_dtim_periods);
 248         if (mvmvif->dbgfs_pm.mask & MVM_DEBUGFS_PM_LPRX_ENA) {
 249                 if (mvmvif->dbgfs_pm.lprx_ena)
 250                         cmd->flags |= cpu_to_le16(POWER_FLAGS_LPRX_ENA_MSK);
 251                 else
 252                         cmd->flags &= cpu_to_le16(~POWER_FLAGS_LPRX_ENA_MSK);
 253         }
 254         if (mvmvif->dbgfs_pm.mask & MVM_DEBUGFS_PM_LPRX_RSSI_THRESHOLD)
 255                 cmd->lprx_rssi_threshold =
 256                         cpu_to_le32(mvmvif->dbgfs_pm.lprx_rssi_threshold);
 257 #endif /* CONFIG_IWLWIFI_DEBUGFS */
 258 }
 259
 260 int iwl_mvm_power_update_mode(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 261 {
 262         int ret;
 263         bool ba_enable;
 264         struct iwl_powertable_cmd cmd = {};
 265
 266         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p)
 267                 return 0;
 268
 269         /*
 270          * TODO: The following vif_count verification is temporary condition.
 271          * Avoid power mode update if more than one interface is currently
 272          * active. Remove this condition when FW will support power management
 273          * on multiple MACs.
 274          */
 275         IWL_DEBUG_POWER(mvm, "Currently %d interfaces active\n",
 276                         mvm->vif_count);
 277         if (mvm->vif_count > 1)
 278                 return 0;
 279
 280         iwl_mvm_power_build_cmd(mvm, vif, &cmd);
 281         iwl_mvm_power_log(mvm, &cmd);
 282
 283         ret = iwl_mvm_send_cmd_pdu(mvm, POWER_TABLE_CMD, CMD_SYNC,
 284                                    sizeof(cmd), &cmd);
 285         if (ret)
 286                 return ret;
 287
 288         ba_enable = !!(cmd.flags &
 289                        cpu_to_le16(POWER_FLAGS_POWER_MANAGEMENT_ENA_MSK));
 290
 291         return iwl_mvm_update_beacon_abort(mvm, vif, ba_enable);
 292 }
 293
 294 int iwl_mvm_power_disable(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 295 {
 296         struct iwl_powertable_cmd cmd = {};
 297         struct iwl_mvm_vif *mvmvif __maybe_unused =
 298                 iwl_mvm_vif_from_mac80211(vif);
 299
 300         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p)
 301                 return 0;
 302
 303         if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
 304                 cmd.flags |= cpu_to_le16(POWER_FLAGS_POWER_SAVE_ENA_MSK);
 305
 306 #ifdef CONFIG_IWLWIFI_DEBUGFS
 307         if (mvmvif->dbgfs_pm.mask & MVM_DEBUGFS_PM_DISABLE_POWER_OFF &&
 308             mvmvif->dbgfs_pm.disable_power_off)
 309                 cmd.flags &= cpu_to_le16(~POWER_FLAGS_POWER_SAVE_ENA_MSK);
 310 #endif
 311         iwl_mvm_power_log(mvm, &cmd);
 312
 313         return iwl_mvm_send_cmd_pdu(mvm, POWER_TABLE_CMD, CMD_ASYNC,
 314                                     sizeof(cmd), &cmd);
 315 }
 316
 317 #ifdef CONFIG_IWLWIFI_DEBUGFS
 318 void
 319 iwl_mvm_beacon_filter_debugfs_parameters(struct ieee80211_vif *vif,
 320                                          struct iwl_beacon_filter_cmd *cmd)
 321 {
 322         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 323         struct iwl_dbgfs_bf *dbgfs_bf = &mvmvif->dbgfs_bf;
 324
 325         if (dbgfs_bf->mask & MVM_DEBUGFS_BF_ENERGY_DELTA)
 326                 cmd->bf_energy_delta = dbgfs_bf->bf_energy_delta;
 327         if (dbgfs_bf->mask & MVM_DEBUGFS_BF_ROAMING_ENERGY_DELTA)
 328                 cmd->bf_roaming_energy_delta =
 329                                  dbgfs_bf->bf_roaming_energy_delta;
 330         if (dbgfs_bf->mask & MVM_DEBUGFS_BF_ROAMING_STATE)
 331                 cmd->bf_roaming_state = dbgfs_bf->bf_roaming_state;
 332         if (dbgfs_bf->mask & MVM_DEBUGFS_BF_TEMPERATURE_DELTA)
 333                 cmd->bf_temperature_delta = dbgfs_bf->bf_temperature_delta;
 334         if (dbgfs_bf->mask & MVM_DEBUGFS_BF_DEBUG_FLAG)
 335                 cmd->bf_debug_flag = dbgfs_bf->bf_debug_flag;
 336         if (dbgfs_bf->mask & MVM_DEBUGFS_BF_ESCAPE_TIMER)
 337                 cmd->bf_escape_timer = cpu_to_le32(dbgfs_bf->bf_escape_timer);
 338         if (dbgfs_bf->mask & MVM_DEBUGFS_BA_ESCAPE_TIMER)
 339                 cmd->ba_escape_timer = cpu_to_le32(dbgfs_bf->ba_escape_timer);
 340         if (dbgfs_bf->mask & MVM_DEBUGFS_BA_ENABLE_BEACON_ABORT)
 341                 cmd->ba_enable_beacon_abort = dbgfs_bf->ba_enable_beacon_abort;
 342 }
 343 #endif
 344
 345 int iwl_mvm_enable_beacon_filter(struct iwl_mvm *mvm,
 346                                  struct ieee80211_vif *vif)
 347 {
 348         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 349         struct iwl_beacon_filter_cmd cmd = {
 350                 IWL_BF_CMD_CONFIG_DEFAULTS,
 351                 .bf_enable_beacon_filter = 1,
 352         };
 353         int ret;
 354
 355         if (mvmvif != mvm->bf_allowed_vif ||
 356             vif->type != NL80211_IFTYPE_STATION || vif->p2p)
 357                 return 0;
 358
 359         iwl_mvm_beacon_filter_debugfs_parameters(vif, &cmd);
 360         ret = iwl_mvm_beacon_filter_send_cmd(mvm, &cmd);
 361
 362         if (!ret)
 363                 mvmvif->bf_enabled = true;
 364
 365         return ret;
 366 }
 367
 368 int iwl_mvm_disable_beacon_filter(struct iwl_mvm *mvm,
 369                                   struct ieee80211_vif *vif)
 370 {
 371         struct iwl_beacon_filter_cmd cmd = {};
 372         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 373         int ret;
 374
 375         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p)
 376                 return 0;
 377
 378         ret = iwl_mvm_beacon_filter_send_cmd(mvm, &cmd);
 379
 380         if (!ret)
 381                 mvmvif->bf_enabled = false;
 382
 383         return ret;
 384 }