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

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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 void iwl_mvm_power_log(struct iwl_mvm *mvm,
  79                               struct iwl_powertable_cmd *cmd)
  80 {
  81         IWL_DEBUG_POWER(mvm,
  82                         "Sending power table command for power level %d, flags = 0x%X\n",
  83                         iwlmvm_mod_params.power_scheme,
  84                         le16_to_cpu(cmd->flags));
  85         IWL_DEBUG_POWER(mvm, "Keep alive = %u sec\n", cmd->keep_alive_seconds);
  86
  87         if (cmd->flags & cpu_to_le16(POWER_FLAGS_POWER_MANAGEMENT_ENA_MSK)) {
  88                 IWL_DEBUG_POWER(mvm, "Rx timeout = %u usec\n",
  89                                 le32_to_cpu(cmd->rx_data_timeout));
  90                 IWL_DEBUG_POWER(mvm, "Tx timeout = %u usec\n",
  91                                 le32_to_cpu(cmd->tx_data_timeout));
  92                 IWL_DEBUG_POWER(mvm, "LP RX RSSI threshold = %u\n",
  93                                 cmd->lprx_rssi_threshold);
  94         }
  95 }
  96
  97 void iwl_mvm_power_build_cmd(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
  98                              struct iwl_powertable_cmd *cmd)
  99 {
 100         struct ieee80211_hw *hw = mvm->hw;
 101         struct ieee80211_chanctx_conf *chanctx_conf;
 102         struct ieee80211_channel *chan;
 103         int dtimper, dtimper_msec;
 104         int keep_alive;
 105         bool radar_detect = false;
 106
 107         /*
 108          * Regardless of power management state the driver must set
 109          * keep alive period. FW will use it for sending keep alive NDPs
 110          * immediately after association.
 111          */
 112         cmd->keep_alive_seconds = POWER_KEEP_ALIVE_PERIOD_SEC;
 113
 114         if (iwlmvm_mod_params.power_scheme == IWL_POWER_SCHEME_CAM)
 115                 return;
 116
 117         cmd->flags |= cpu_to_le16(POWER_FLAGS_POWER_SAVE_ENA_MSK);
 118
 119         if (!vif->bss_conf.ps)
 120                 return;
 121
 122         cmd->flags |= cpu_to_le16(POWER_FLAGS_POWER_MANAGEMENT_ENA_MSK);
 123
 124         dtimper = hw->conf.ps_dtim_period ?: 1;
 125
 126         /* Check if radar detection is required on current channel */
 127         rcu_read_lock();
 128         chanctx_conf = rcu_dereference(vif->chanctx_conf);
 129         WARN_ON(!chanctx_conf);
 130         if (chanctx_conf) {
 131                 chan = chanctx_conf->def.chan;
 132                 radar_detect = chan->flags & IEEE80211_CHAN_RADAR;
 133         }
 134         rcu_read_unlock();
 135
 136         /* Check skip over DTIM conditions */
 137         if (!radar_detect && (dtimper <= 10) &&
 138             (iwlmvm_mod_params.power_scheme == IWL_POWER_SCHEME_LP))
 139                 cmd->flags |= cpu_to_le16(POWER_FLAGS_SKIP_OVER_DTIM_MSK);
 140
 141         /* Check that keep alive period is at least 3 * DTIM */
 142         dtimper_msec = dtimper * vif->bss_conf.beacon_int;
 143         keep_alive = max_t(int, 3 * dtimper_msec,
 144                            MSEC_PER_SEC * cmd->keep_alive_seconds);
 145         keep_alive = DIV_ROUND_UP(keep_alive, MSEC_PER_SEC);
 146         cmd->keep_alive_seconds = keep_alive;
 147
 148         cmd->rx_data_timeout = cpu_to_le32(100 * USEC_PER_MSEC);
 149         cmd->tx_data_timeout = cpu_to_le32(100 * USEC_PER_MSEC);
 150 }
 151
 152 int iwl_mvm_power_update_mode(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 153 {
 154         struct iwl_powertable_cmd cmd = {};
 155
 156         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p)
 157                 return 0;
 158
 159         iwl_mvm_power_build_cmd(mvm, vif, &cmd);
 160         iwl_mvm_power_log(mvm, &cmd);
 161
 162         return iwl_mvm_send_cmd_pdu(mvm, POWER_TABLE_CMD, CMD_SYNC,
 163                                     sizeof(cmd), &cmd);
 164 }
 165
 166 int iwl_mvm_power_disable(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 167 {
 168         struct iwl_powertable_cmd cmd = {};
 169
 170         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p)
 171                 return 0;
 172
 173         if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
 174                 cmd.flags |= cpu_to_le16(POWER_FLAGS_POWER_SAVE_ENA_MSK);
 175
 176         iwl_mvm_power_log(mvm, &cmd);
 177
 178         return iwl_mvm_send_cmd_pdu(mvm, POWER_TABLE_CMD, CMD_ASYNC,
 179                                     sizeof(cmd), &cmd);
 180 }
 181
 182 static int iwl_mvm_beacon_filter_send_cmd(struct iwl_mvm *mvm,
 183                                           struct iwl_beacon_filter_cmd *cmd)
 184 {
 185         int ret;
 186
 187         ret = iwl_mvm_send_cmd_pdu(mvm, REPLY_BEACON_FILTERING_CMD, CMD_SYNC,
 188                                    sizeof(struct iwl_beacon_filter_cmd), cmd);
 189
 190         if (!ret) {
 191                 IWL_DEBUG_POWER(mvm, "ba_enable_beacon_abort is: %d\n",
 192                                 cmd->ba_enable_beacon_abort);
 193                 IWL_DEBUG_POWER(mvm, "ba_escape_timer is: %d\n",
 194                                 cmd->ba_escape_timer);
 195                 IWL_DEBUG_POWER(mvm, "bf_debug_flag is: %d\n",
 196                                 cmd->bf_debug_flag);
 197                 IWL_DEBUG_POWER(mvm, "bf_enable_beacon_filter is: %d\n",
 198                                 cmd->bf_enable_beacon_filter);
 199                 IWL_DEBUG_POWER(mvm, "bf_energy_delta is: %d\n",
 200                                 cmd->bf_energy_delta);
 201                 IWL_DEBUG_POWER(mvm, "bf_escape_timer is: %d\n",
 202                                 cmd->bf_escape_timer);
 203                 IWL_DEBUG_POWER(mvm, "bf_roaming_energy_delta is: %d\n",
 204                                 cmd->bf_roaming_energy_delta);
 205                 IWL_DEBUG_POWER(mvm, "bf_roaming_state is: %d\n",
 206                                 cmd->bf_roaming_state);
 207                 IWL_DEBUG_POWER(mvm, "bf_temperature_delta is: %d\n",
 208                                 cmd->bf_temperature_delta);
 209         }
 210         return ret;
 211 }
 212
 213 int iwl_mvm_enable_beacon_filter(struct iwl_mvm *mvm,
 214                                  struct ieee80211_vif *vif)
 215 {
 216         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 217         struct iwl_beacon_filter_cmd cmd = {
 218                 .bf_enable_beacon_filter = 1,
 219                 .bf_energy_delta = IWL_BF_ENERGY_DELTA_DEFAULT,
 220                 .bf_roaming_energy_delta = IWL_BF_ROAMING_ENERGY_DELTA_DEFAULT,
 221                 .bf_roaming_state = IWL_BF_ROAMING_STATE_DEFAULT,
 222                 .bf_temperature_delta = IWL_BF_TEMPERATURE_DELTA_DEFAULT,
 223                 .bf_debug_flag = IWL_BF_DEBUG_FLAG_DEFAULT,
 224                 .bf_escape_timer = cpu_to_le32(IWL_BF_ESCAPE_TIMER_DEFAULT),
 225                 .ba_escape_timer = cpu_to_le32(IWL_BA_ESCAPE_TIMER_DEFAULT),
 226                 .ba_enable_beacon_abort = IWL_BA_ENABLE_BEACON_ABORT_DEFAULT,
 227         };
 228
 229         if (mvmvif != mvm->bf_allowed_vif ||
 230             vif->type != NL80211_IFTYPE_STATION || vif->p2p)
 231                 return 0;
 232
 233         return iwl_mvm_beacon_filter_send_cmd(mvm, &cmd);
 234 }
 235
 236 int iwl_mvm_disable_beacon_filter(struct iwl_mvm *mvm,
 237                                   struct ieee80211_vif *vif)
 238 {
 239         struct iwl_beacon_filter_cmd cmd = {
 240                 .bf_enable_beacon_filter = 0,
 241         };
 242
 243         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p)
 244                 return 0;
 245
 246         return iwl_mvm_beacon_filter_send_cmd(mvm, &cmd);
 247 }