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iwlwifi: mvm: add trigger for firmware dump upon low RSSI 

Lots of issues can be caught when the RSSI drops. Add the
ability to collect the firmware data at that point.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
This commit is contained in:
Emmanuel Grumbach 2015-02-03 14:29:36 +02:00
parent 5a756c20c4
commit 3ec50b5eec
3 changed files with 30 additions and 0 deletions
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3
drivers/net/wireless/iwlwifi/iwl-fw-error-dump.h
View File

@ -248,6 +248,8 @@ iwl_fw_error_next_data(struct iwl_fw_error_dump_data *data)
* command response or a notification.
* @FW_DB_TRIGGER_RESERVED: reserved
* @FW_DBG_TRIGGER_STATS: trigger log collection upon statistics threshold.
* @FW_DBG_TRIGGER_RSSI: trigger log collection when the rssi of the beacon
* goes below a threshold.
*/
enum iwl_fw_dbg_trigger {
FW_DBG_TRIGGER_INVALID = 0,
@ -258,6 +260,7 @@ enum iwl_fw_dbg_trigger {
FW_DBG_TRIGGER_FW_NOTIF,
FW_DB_TRIGGER_RESERVED,
FW_DBG_TRIGGER_STATS,
FW_DBG_TRIGGER_RSSI,
/* must be last */
FW_DBG_TRIGGER_MAX,

8
drivers/net/wireless/iwlwifi/iwl-fw-file.h
View File

@ -565,6 +565,14 @@ struct iwl_fw_dbg_trigger_stats {
__le32 start_threshold;
} __packed;
/**
* struct iwl_fw_dbg_trigger_low_rssi - trigger for low beacon RSSI
* @rssi: RSSI value to trigger at
*/
struct iwl_fw_dbg_trigger_low_rssi {
__le32 rssi;
} __packed;
/**
* struct iwl_fw_dbg_conf_tlv - a TLV that describes a debug configuration.
* @id: conf id

19
drivers/net/wireless/iwlwifi/mvm/rx.c
View File

@ -345,6 +345,25 @@ int iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
struct iwl_mvm_sta *mvmsta;
mvmsta = iwl_mvm_sta_from_mac80211(sta);
rs_update_last_rssi(mvm, &mvmsta->lq_sta, rx_status);
if (iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_RSSI) &&
ieee80211_is_beacon(hdr->frame_control)) {
struct iwl_fw_dbg_trigger_tlv *trig;
struct iwl_fw_dbg_trigger_low_rssi *rssi_trig;
bool trig_check;
s32 rssi;
trig = iwl_fw_dbg_get_trigger(mvm->fw,
FW_DBG_TRIGGER_RSSI);
rssi_trig = (void *)trig->data;
rssi = le32_to_cpu(rssi_trig->rssi);
trig_check =
iwl_fw_dbg_trigger_check_stop(mvm, mvmsta->vif,
trig);
if (trig_check && rx_status->signal < rssi)
iwl_mvm_fw_dbg_collect_trig(mvm, trig, NULL, 0);
}
}
rcu_read_unlock();