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iwlwifi: mvm: Add support for Low Power RX

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To improve power consumption in idle associated mode FW may lower
RX power. This low linearity mode is acceptable for listening low rate
RX such as beacons and groupcast. The driver enables LPRX only if PM
is enabled and associated AP's beacon TX rate is 1Mbps or 6Mbps.
LPRX RSSI threshold is used to limit a range where LPRX is applied.

Signed-off-by: Alexander Bondar <alexander.bondar@intel.com>
Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Alexander Bondar
2013-03-21 17:14:14 +02:00
committed by Johannes Berg
parent 9277326e1e
commit bd4ace2a36
4 changed files with 52 additions and 3 deletions
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22
drivers/net/wireless/iwlwifi/mvm/power.c
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@@ -137,11 +137,12 @@ static void iwl_mvm_power_log(struct iwl_mvm *mvm,
le32_to_cpu(cmd->rx_data_timeout));
IWL_DEBUG_POWER(mvm, "Tx timeout = %u usec\n",
le32_to_cpu(cmd->tx_data_timeout));
IWL_DEBUG_POWER(mvm, "LP RX RSSI threshold = %u\n",
cmd->lprx_rssi_threshold);
if (cmd->flags & cpu_to_le16(POWER_FLAGS_SKIP_OVER_DTIM_MSK))
IWL_DEBUG_POWER(mvm, "DTIM periods to skip = %u\n",
le32_to_cpu(cmd->skip_dtim_periods));
if (cmd->flags & cpu_to_le16(POWER_FLAGS_LPRX_ENA_MSK))
IWL_DEBUG_POWER(mvm, "LP RX RSSI threshold = %u\n",
le32_to_cpu(cmd->lprx_rssi_threshold));
}
}
@@ -181,6 +182,14 @@ void iwl_mvm_power_build_cmd(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
cmd->flags |= cpu_to_le16(POWER_FLAGS_POWER_MANAGEMENT_ENA_MSK);
if (vif->bss_conf.beacon_rate &&
(vif->bss_conf.beacon_rate->bitrate == 10 ||
vif->bss_conf.beacon_rate->bitrate == 60)) {
cmd->flags |= cpu_to_le16(POWER_FLAGS_LPRX_ENA_MSK);
cmd->lprx_rssi_threshold =
cpu_to_le32(POWER_LPRX_RSSI_THRESHOLD);
}
dtimper = hw->conf.ps_dtim_period ?: 1;
/* Check if radar detection is required on current channel */
@@ -236,6 +245,15 @@ void iwl_mvm_power_build_cmd(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
if (mvmvif->dbgfs_pm.mask & MVM_DEBUGFS_PM_SKIP_DTIM_PERIODS)
cmd->skip_dtim_periods =
cpu_to_le32(mvmvif->dbgfs_pm.skip_dtim_periods);
if (mvmvif->dbgfs_pm.mask & MVM_DEBUGFS_PM_LPRX_ENA) {
if (mvmvif->dbgfs_pm.lprx_ena)
cmd->flags |= cpu_to_le16(POWER_FLAGS_LPRX_ENA_MSK);
else
cmd->flags &= cpu_to_le16(~POWER_FLAGS_LPRX_ENA_MSK);
}
if (mvmvif->dbgfs_pm.mask & MVM_DEBUGFS_PM_LPRX_RSSI_THRESHOLD)
cmd->lprx_rssi_threshold =
cpu_to_le32(mvmvif->dbgfs_pm.lprx_rssi_threshold);
#endif /* CONFIG_IWLWIFI_DEBUGFS */
}