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iwlwifi: mvm: Implement CQM offloading 

Use beacon statistics notification to track RSSI.
Notify mac80211 when the tresholds are crossed.
The roaming treshold is configured to be
equal to cqm_thold. If the beacon filtering command
is not supported by fw fall back and use mac80211
mechanism.

Signed-off-by: Andrei Otcheretianski <andrei.otcheretianski@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Andrei Otcheretianski 2013-07-21 17:23:59 +03:00 committed by Johannes Berg
parent eafe25e0af
commit a20fd39866
6 changed files with 133 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/net/wireless/iwlwifi/mvm/debugfs.c
View File

@ -920,7 +920,7 @@ static ssize_t iwl_dbgfs_bf_params_read(struct file *file,
};
iwl_mvm_beacon_filter_debugfs_parameters(vif, &cmd);
if (mvmvif->bf_enabled)
if (mvmvif->bf_data.bf_enabled)
cmd.bf_enable_beacon_filter = cpu_to_le32(1);
else
cmd.bf_enable_beacon_filter = 0;

2
drivers/net/wireless/iwlwifi/mvm/fw-api.h
View File

@ -1321,7 +1321,7 @@ struct mvm_statistics_general {
struct mvm_statistics_general_common common;
__le32 beacon_filtered;
__le32 missed_beacons;
__s8 beacon_filter_everage_energy;
__s8 beacon_filter_average_energy;
__s8 beacon_filter_reason;
__s8 beacon_filter_current_energy;
__s8 beacon_filter_reserved;

22
drivers/net/wireless/iwlwifi/mvm/mac80211.c
View File

@ -575,7 +575,8 @@ static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
vif->type == NL80211_IFTYPE_STATION && !vif->p2p &&
mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BF_UPDATED){
mvm->bf_allowed_vif = mvmvif;
vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER;
vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
IEEE80211_VIF_SUPPORTS_CQM_RSSI;
}
/*
@ -615,7 +616,8 @@ static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
out_free_bf:
if (mvm->bf_allowed_vif == mvmvif) {
mvm->bf_allowed_vif = NULL;
vif->driver_flags &= ~IEEE80211_VIF_BEACON_FILTER;
vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
IEEE80211_VIF_SUPPORTS_CQM_RSSI);
}
out_remove_mac:
mvmvif->phy_ctxt = NULL;
@ -681,7 +683,8 @@ static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
if (mvm->bf_allowed_vif == mvmvif) {
mvm->bf_allowed_vif = NULL;
vif->driver_flags &= ~IEEE80211_VIF_BEACON_FILTER;
vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
IEEE80211_VIF_SUPPORTS_CQM_RSSI);
}
iwl_mvm_vif_dbgfs_clean(mvm, vif);
@ -799,6 +802,10 @@ static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
if (ret)
IWL_ERR(mvm, "failed to update quotas\n");
}
/* reset rssi values */
mvmvif->bf_data.ave_beacon_signal = 0;
if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD)) {
/* Workaround for FW bug, otherwise FW disables device
* power save upon disassociation
@ -825,6 +832,15 @@ static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
bss_conf->txpower);
iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
}
if (changes & BSS_CHANGED_CQM) {
IWL_DEBUG_MAC80211(mvm, "cqm info_changed");
/* reset cqm events tracking */
mvmvif->bf_data.last_cqm_event = 0;
ret = iwl_mvm_update_beacon_filter(mvm, vif);
if (ret)
IWL_ERR(mvm, "failed to update CQM thresholds\n");
}
}
static int iwl_mvm_start_ap(struct ieee80211_hw *hw, struct ieee80211_vif *vif)

20
drivers/net/wireless/iwlwifi/mvm/mvm.h
View File

@ -232,6 +232,21 @@ enum iwl_mvm_smps_type_request {
NUM_IWL_MVM_SMPS_REQ,
};
/**
* struct iwl_mvm_vif_bf_data - beacon filtering related data
* @bf_enabled: indicates if beacon filtering is enabled
* @ba_enabled: indicated if beacon abort is enabled
* @last_beacon_signal: last beacon rssi signal in dbm
* @ave_beacon_signal: average beacon signal
* @last_cqm_event: rssi of the last cqm event
*/
struct iwl_mvm_vif_bf_data {
bool bf_enabled;
bool ba_enabled;
s8 ave_beacon_signal;
s8 last_cqm_event;
};
/**
* struct iwl_mvm_vif - data per Virtual Interface, it is a MAC context
* @id: between 0 and 3
@ -257,8 +272,7 @@ struct iwl_mvm_vif {
bool uploaded;
bool ap_active;
bool monitor_active;
/* indicate whether beacon filtering is enabled */
bool bf_enabled;
struct iwl_mvm_vif_bf_data bf_data;
u32 ap_beacon_time;
@ -758,6 +772,8 @@ int iwl_mvm_beacon_filter_send_cmd(struct iwl_mvm *mvm,
struct iwl_beacon_filter_cmd *cmd);
int iwl_mvm_update_beacon_abort(struct iwl_mvm *mvm,
struct ieee80211_vif *vif, bool enable);
int iwl_mvm_update_beacon_filter(struct iwl_mvm *mvm,
struct ieee80211_vif *vif);
/* SMPS */
void iwl_mvm_update_smps(struct iwl_mvm *mvm, struct ieee80211_vif *vif,

37
drivers/net/wireless/iwlwifi/mvm/power.c
View File

@ -110,6 +110,23 @@ int iwl_mvm_beacon_filter_send_cmd(struct iwl_mvm *mvm,
return ret;
}
static
void iwl_mvm_beacon_filter_set_cqm_params(struct iwl_mvm *mvm,
struct ieee80211_vif *vif,
struct iwl_beacon_filter_cmd *cmd)
{
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
if (vif->bss_conf.cqm_rssi_thold) {
cmd->bf_energy_delta =
cpu_to_le32(vif->bss_conf.cqm_rssi_hyst);
/* fw uses an absolute value for this */
cmd->bf_roaming_state =
cpu_to_le32(-vif->bss_conf.cqm_rssi_thold);
}
cmd->ba_enable_beacon_abort = cpu_to_le32(mvmvif->bf_data.ba_enabled);
}
int iwl_mvm_update_beacon_abort(struct iwl_mvm *mvm,
struct ieee80211_vif *vif, bool enable)
{
@ -120,12 +137,14 @@ int iwl_mvm_update_beacon_abort(struct iwl_mvm *mvm,
.ba_enable_beacon_abort = cpu_to_le32(enable),
};
if (!mvmvif->bf_enabled)
if (!mvmvif->bf_data.bf_enabled)
return 0;
if (mvm->cur_ucode == IWL_UCODE_WOWLAN)
cmd.ba_escape_timer = cpu_to_le32(IWL_BA_ESCAPE_TIMER_D3);
mvmvif->bf_data.ba_enabled = enable;
iwl_mvm_beacon_filter_set_cqm_params(mvm, vif, &cmd);
iwl_mvm_beacon_filter_debugfs_parameters(vif, &cmd);
return iwl_mvm_beacon_filter_send_cmd(mvm, &cmd);
}
@ -510,11 +529,12 @@ int iwl_mvm_enable_beacon_filter(struct iwl_mvm *mvm,
vif->type != NL80211_IFTYPE_STATION || vif->p2p)
return 0;
iwl_mvm_beacon_filter_set_cqm_params(mvm, vif, &cmd);
iwl_mvm_beacon_filter_debugfs_parameters(vif, &cmd);
ret = iwl_mvm_beacon_filter_send_cmd(mvm, &cmd);
if (!ret)
mvmvif->bf_enabled = true;
mvmvif->bf_data.bf_enabled = true;
return ret;
}
@ -533,11 +553,22 @@ int iwl_mvm_disable_beacon_filter(struct iwl_mvm *mvm,
ret = iwl_mvm_beacon_filter_send_cmd(mvm, &cmd);
if (!ret)
mvmvif->bf_enabled = false;
mvmvif->bf_data.bf_enabled = false;
return ret;
}
int iwl_mvm_update_beacon_filter(struct iwl_mvm *mvm,
struct ieee80211_vif *vif)
{
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
if (!mvmvif->bf_data.bf_enabled)
return 0;
return iwl_mvm_enable_beacon_filter(mvm, vif);
}
const struct iwl_mvm_power_ops pm_mac_ops = {
.power_update_mode = iwl_mvm_power_mac_update_mode,
.power_disable = iwl_mvm_power_mac_disable,

61
drivers/net/wireless/iwlwifi/mvm/rx.c
View File

@ -396,11 +396,62 @@ static void iwl_mvm_update_rx_statistics(struct iwl_mvm *mvm,
memcpy(&mvm->rx_stats, &stats->rx, sizeof(struct mvm_statistics_rx));
}
struct iwl_mvm_stat_data {
struct iwl_notif_statistics *stats;
struct iwl_mvm *mvm;
};
static void iwl_mvm_stat_iterator(void *_data, u8 *mac,
struct ieee80211_vif *vif)
{
struct iwl_mvm_stat_data *data = _data;
struct iwl_notif_statistics *stats = data->stats;
struct iwl_mvm *mvm = data->mvm;
int sig = -stats->general.beacon_filter_average_energy;
int last_event;
int thold = vif->bss_conf.cqm_rssi_thold;
int hyst = vif->bss_conf.cqm_rssi_hyst;
u16 id = le32_to_cpu(stats->rx.general.mac_id);
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
if (mvmvif->id != id)
return;
if (vif->type != NL80211_IFTYPE_STATION)
return;
mvmvif->bf_data.ave_beacon_signal = sig;
if (!(vif->driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI))
return;
/* CQM Notification */
last_event = mvmvif->bf_data.last_cqm_event;
if (thold && sig < thold && (last_event == 0 ||
sig < last_event - hyst)) {
mvmvif->bf_data.last_cqm_event = sig;
IWL_DEBUG_RX(mvm, "cqm_iterator cqm low %d\n",
sig);
ieee80211_cqm_rssi_notify(
vif,
NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
GFP_KERNEL);
} else if (sig > thold &&
(last_event == 0 || sig > last_event + hyst)) {
mvmvif->bf_data.last_cqm_event = sig;
IWL_DEBUG_RX(mvm, "cqm_iterator cqm high %d\n",
sig);
ieee80211_cqm_rssi_notify(
vif,
NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
GFP_KERNEL);
}
}
/*
* iwl_mvm_rx_statistics - STATISTICS_NOTIFICATION handler
*
* TODO: This handler is implemented partially.
* It only gets the NIC's temperature.
*/
int iwl_mvm_rx_statistics(struct iwl_mvm *mvm,
struct iwl_rx_cmd_buffer *rxb,
@ -409,6 +460,10 @@ int iwl_mvm_rx_statistics(struct iwl_mvm *mvm,
struct iwl_rx_packet *pkt = rxb_addr(rxb);
struct iwl_notif_statistics *stats = (void *)&pkt->data;
struct mvm_statistics_general_common *common = &stats->general.common;
struct iwl_mvm_stat_data data = {
.stats = stats,
.mvm = mvm,
};
if (mvm->temperature != le32_to_cpu(common->temperature)) {
mvm->temperature = le32_to_cpu(common->temperature);
@ -416,5 +471,9 @@ int iwl_mvm_rx_statistics(struct iwl_mvm *mvm,
}
iwl_mvm_update_rx_statistics(mvm, stats);
ieee80211_iterate_active_interfaces(mvm->hw,
IEEE80211_IFACE_ITER_NORMAL,
iwl_mvm_stat_iterator,
&data);
return 0;
}