iwlwifi: mvm: remove support for Link Quality Measurements

This was never used by any product. Remove it.
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

drivers/net/wireless/intel/iwlwifi/fw/api/mac-cfg.h

@@ -67,79 +67,12 @@
  * enum iwl_mac_conf_subcmd_ids - mac configuration command IDs
  */
 enum iwl_mac_conf_subcmd_ids {
-	/**
-	 * @LINK_QUALITY_MEASUREMENT_CMD: &struct iwl_link_qual_msrmnt_cmd
-	 */
-	LINK_QUALITY_MEASUREMENT_CMD = 0x1,
-
-	/**
-	 * @LINK_QUALITY_MEASUREMENT_COMPLETE_NOTIF:
-	 * &struct iwl_link_qual_msrmnt_notif
-	 */
-	LINK_QUALITY_MEASUREMENT_COMPLETE_NOTIF = 0xFE,
-
 	/**
 	 * @CHANNEL_SWITCH_NOA_NOTIF: &struct iwl_channel_switch_noa_notif
 	 */
 	CHANNEL_SWITCH_NOA_NOTIF = 0xFF,
 };
 
-#define LQM_NUMBER_OF_STATIONS_IN_REPORT 16
-
-enum iwl_lqm_cmd_operatrions {
-	LQM_CMD_OPERATION_START_MEASUREMENT = 0x01,
-	LQM_CMD_OPERATION_STOP_MEASUREMENT = 0x02,
-};
-
-enum iwl_lqm_status {
-	LQM_STATUS_SUCCESS = 0,
-	LQM_STATUS_TIMEOUT = 1,
-	LQM_STATUS_ABORT = 2,
-};
-
-/**
- * struct iwl_link_qual_msrmnt_cmd - Link Quality Measurement command
- * @cmd_operation: command operation to be performed (start or stop)
- *	as defined above.
- * @mac_id: MAC ID the measurement applies to.
- * @measurement_time: time of the total measurement to be performed, in uSec.
- * @timeout: maximum time allowed until a response is sent, in uSec.
- */
-struct iwl_link_qual_msrmnt_cmd {
-	__le32 cmd_operation;
-	__le32 mac_id;
-	__le32 measurement_time;
-	__le32 timeout;
-} __packed /* LQM_CMD_API_S_VER_1 */;
-
-/**
- * struct iwl_link_qual_msrmnt_notif - Link Quality Measurement notification
- *
- * @frequent_stations_air_time: an array containing the total air time
- *	(in uSec) used by the most frequently transmitting stations.
- * @number_of_stations: the number of uniqe stations included in the array
- *	(a number between 0 to 16)
- * @total_air_time_other_stations: the total air time (uSec) used by all the
- *	stations which are not included in the above report.
- * @time_in_measurement_window: the total time in uSec in which a measurement
- *	took place.
- * @tx_frame_dropped: the number of TX frames dropped due to retry limit during
- *	measurement
- * @mac_id: MAC ID the measurement applies to.
- * @status: return status. may be one of the LQM_STATUS_* defined above.
- * @reserved: reserved.
- */
-struct iwl_link_qual_msrmnt_notif {
-	__le32 frequent_stations_air_time[LQM_NUMBER_OF_STATIONS_IN_REPORT];
-	__le32 number_of_stations;
-	__le32 total_air_time_other_stations;
-	__le32 time_in_measurement_window;
-	__le32 tx_frame_dropped;
-	__le32 mac_id;
-	__le32 status;
-	u8 reserved[12];
-} __packed; /* LQM_MEASUREMENT_COMPLETE_NTF_API_S_VER1 */
-
 /**
  * struct iwl_channel_switch_noa_notif - Channel switch NOA notification
  *

drivers/net/wireless/intel/iwlwifi/mvm/debugfs-vif.c

@@ -1455,80 +1455,6 @@ static const char * const chanwidths[] = {
 	[NL80211_CHAN_WIDTH_160] = "vht160",
 };
 
-static bool iwl_mvm_lqm_notif_wait(struct iwl_notif_wait_data *notif_wait,
-				   struct iwl_rx_packet *pkt, void *data)
-{
-	struct ieee80211_vif *vif = data;
-	struct iwl_mvm *mvm =
-		container_of(notif_wait, struct iwl_mvm, notif_wait);
-	struct iwl_link_qual_msrmnt_notif *report = (void *)pkt->data;
-	u32 num_of_stations = le32_to_cpu(report->number_of_stations);
-	int i;
-
-	IWL_INFO(mvm, "LQM report:\n");
-	IWL_INFO(mvm, "\tstatus: %d\n", report->status);
-	IWL_INFO(mvm, "\tmacID: %d\n", le32_to_cpu(report->mac_id));
-	IWL_INFO(mvm, "\ttx_frame_dropped: %d\n",
-		 le32_to_cpu(report->tx_frame_dropped));
-	IWL_INFO(mvm, "\ttime_in_measurement_window: %d us\n",
-		 le32_to_cpu(report->time_in_measurement_window));
-	IWL_INFO(mvm, "\ttotal_air_time_other_stations: %d\n",
-		 le32_to_cpu(report->total_air_time_other_stations));
-	IWL_INFO(mvm, "\tchannel_freq: %d\n",
-		 vif->bss_conf.chandef.center_freq1);
-	IWL_INFO(mvm, "\tchannel_width: %s\n",
-		 chanwidths[vif->bss_conf.chandef.width]);
-	IWL_INFO(mvm, "\tnumber_of_stations: %d\n", num_of_stations);
-	for (i = 0; i < num_of_stations; i++)
-		IWL_INFO(mvm, "\t\tsta[%d]: %d\n", i,
-			 report->frequent_stations_air_time[i]);
-
-	return true;
-}
-
-static ssize_t iwl_dbgfs_lqm_send_cmd_write(struct ieee80211_vif *vif,
-					    char *buf, size_t count,
-					    loff_t *ppos)
-{
-	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
-	struct iwl_mvm *mvm = mvmvif->mvm;
-	struct iwl_notification_wait wait_lqm_notif;
-	static u16 lqm_notif[] = {
-		WIDE_ID(MAC_CONF_GROUP,
-			LINK_QUALITY_MEASUREMENT_COMPLETE_NOTIF)
-	};
-	int err;
-	u32 duration;
-	u32 timeout;
-
-	if (sscanf(buf, "%d,%d", &duration, &timeout) != 2)
-		return -EINVAL;
-
-	iwl_init_notification_wait(&mvm->notif_wait, &wait_lqm_notif,
-				   lqm_notif, ARRAY_SIZE(lqm_notif),
-				   iwl_mvm_lqm_notif_wait, vif);
-	mutex_lock(&mvm->mutex);
-	err = iwl_mvm_send_lqm_cmd(vif, LQM_CMD_OPERATION_START_MEASUREMENT,
-				   duration, timeout);
-	mutex_unlock(&mvm->mutex);
-
-	if (err) {
-		IWL_ERR(mvm, "Failed to send lqm cmdf(err=%d)\n", err);
-		iwl_remove_notification(&mvm->notif_wait, &wait_lqm_notif);
-		return err;
-	}
-
-	/* wait for 2 * timeout (safety guard) and convert to jiffies*/
-	timeout = msecs_to_jiffies((timeout * 2) / 1000);
-
-	err = iwl_wait_notification(&mvm->notif_wait, &wait_lqm_notif,
-				    timeout);
-	if (err)
-		IWL_ERR(mvm, "Getting lqm notif timed out\n");
-
-	return count;
-}
-
 #define MVM_DEBUGFS_WRITE_FILE_OPS(name, bufsz) \
 	_MVM_DEBUGFS_WRITE_FILE_OPS(name, bufsz, struct ieee80211_vif)
 #define MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz) \
@@ -1553,7 +1479,6 @@ MVM_DEBUGFS_READ_WRITE_FILE_OPS(tof_range_abort, 32);
 MVM_DEBUGFS_READ_FILE_OPS(tof_range_response);
 MVM_DEBUGFS_READ_WRITE_FILE_OPS(tof_responder_params, 32);
 MVM_DEBUGFS_READ_WRITE_FILE_OPS(quota_min, 32);
-MVM_DEBUGFS_WRITE_FILE_OPS(lqm_send_cmd, 64);
 MVM_DEBUGFS_READ_FILE_OPS(os_device_timediff);
 
 
@@ -1594,7 +1519,6 @@ void iwl_mvm_vif_dbgfs_register(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 				 S_IRUSR | S_IWUSR);
 	MVM_DEBUGFS_ADD_FILE_VIF(quota_min, mvmvif->dbgfs_dir,
 				 S_IRUSR | S_IWUSR);
-	MVM_DEBUGFS_ADD_FILE_VIF(lqm_send_cmd, mvmvif->dbgfs_dir, S_IWUSR);
 	MVM_DEBUGFS_ADD_FILE_VIF(os_device_timediff,
 				 mvmvif->dbgfs_dir, S_IRUSR);
 

drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c

@@ -1878,11 +1878,6 @@ static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
 	if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc)
 		iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
 
-	if (changes & BSS_CHANGED_ASSOC && !bss_conf->assoc &&
-	    mvmvif->lqm_active)
-		iwl_mvm_send_lqm_cmd(vif, LQM_CMD_OPERATION_STOP_MEASUREMENT,
-				     0, 0);
-
 	/*
 	 * If we're not associated yet, take the (new) BSSID before associating
 	 * so the firmware knows. If we're already associated, then use the old
@@ -3879,11 +3874,6 @@ static int iwl_mvm_pre_channel_switch(struct ieee80211_hw *hw,
 
 		break;
 	case NL80211_IFTYPE_STATION:
-		if (mvmvif->lqm_active)
-			iwl_mvm_send_lqm_cmd(vif,
-					     LQM_CMD_OPERATION_STOP_MEASUREMENT,
-					     0, 0);
-
 		/* Schedule the time event to a bit before beacon 1,
 		 * to make sure we're in the new channel when the
 		 * GO/AP arrives. In case count <= 1 immediately schedule the

drivers/net/wireless/intel/iwlwifi/mvm/mvm.h

@@ -436,12 +436,6 @@ struct iwl_mvm_vif {
 
 	/* TCP Checksum Offload */
 	netdev_features_t features;
-
-	/*
-	 * link quality measurement - used to check whether this interface
-	 * is in the middle of a link quality measurement
-	 */
-	bool lqm_active;
 };
 
 static inline struct iwl_mvm_vif *
@@ -1846,12 +1840,6 @@ unsigned int iwl_mvm_get_wd_timeout(struct iwl_mvm *mvm,
 void iwl_mvm_connection_loss(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 			     const char *errmsg);
 
-/* Link Quality Measurement */
-int iwl_mvm_send_lqm_cmd(struct ieee80211_vif *vif,
-			 enum iwl_lqm_cmd_operatrions operation,
-			 u32 duration, u32 timeout);
-bool iwl_mvm_lqm_active(struct iwl_mvm *mvm);
-
 int iwl_mvm_sar_select_profile(struct iwl_mvm *mvm, int prof_a, int prof_b);
 int iwl_mvm_get_sar_geo_profile(struct iwl_mvm *mvm);
 

drivers/net/wireless/intel/iwlwifi/mvm/ops.c

@@ -423,8 +423,6 @@ static const struct iwl_hcmd_names iwl_mvm_system_names[] = {
  * Access is done through binary search
  */
 static const struct iwl_hcmd_names iwl_mvm_mac_conf_names[] = {
-	HCMD_NAME(LINK_QUALITY_MEASUREMENT_CMD),
-	HCMD_NAME(LINK_QUALITY_MEASUREMENT_COMPLETE_NOTIF),
 	HCMD_NAME(CHANNEL_SWITCH_NOA_NOTIF),
 };
 

drivers/net/wireless/intel/iwlwifi/mvm/utils.c

@@ -1389,74 +1389,3 @@ void iwl_mvm_get_sync_time(struct iwl_mvm *mvm, u32 *gp2, u64 *boottime)
 		iwl_mvm_power_update_device(mvm);
 	}
 }
-
-int iwl_mvm_send_lqm_cmd(struct ieee80211_vif *vif,
-			 enum iwl_lqm_cmd_operatrions operation,
-			 u32 duration, u32 timeout)
-{
-	struct iwl_mvm_vif *mvm_vif = iwl_mvm_vif_from_mac80211(vif);
-	struct iwl_link_qual_msrmnt_cmd cmd = {
-		.cmd_operation = cpu_to_le32(operation),
-		.mac_id = cpu_to_le32(mvm_vif->id),
-		.measurement_time = cpu_to_le32(duration),
-		.timeout = cpu_to_le32(timeout),
-	};
-	u32 cmdid =
-		iwl_cmd_id(LINK_QUALITY_MEASUREMENT_CMD, MAC_CONF_GROUP, 0);
-	int ret;
-
-	if (!fw_has_capa(&mvm_vif->mvm->fw->ucode_capa,
-			 IWL_UCODE_TLV_CAPA_LQM_SUPPORT))
-		return -EOPNOTSUPP;
-
-	if (vif->type != NL80211_IFTYPE_STATION || vif->p2p)
-		return -EINVAL;
-
-	switch (operation) {
-	case LQM_CMD_OPERATION_START_MEASUREMENT:
-		if (iwl_mvm_lqm_active(mvm_vif->mvm))
-			return -EBUSY;
-		if (!vif->bss_conf.assoc)
-			return -EINVAL;
-		mvm_vif->lqm_active = true;
-		break;
-	case LQM_CMD_OPERATION_STOP_MEASUREMENT:
-		if (!iwl_mvm_lqm_active(mvm_vif->mvm))
-			return -EINVAL;
-		break;
-	default:
-		return -EINVAL;
-	}
-
-	ret = iwl_mvm_send_cmd_pdu(mvm_vif->mvm, cmdid, 0, sizeof(cmd),
-				   &cmd);
-
-	/* command failed - roll back lqm_active state */
-	if (ret) {
-		mvm_vif->lqm_active =
-			operation == LQM_CMD_OPERATION_STOP_MEASUREMENT;
-	}
-
-	return ret;
-}
-
-static void iwl_mvm_lqm_active_iterator(void *_data, u8 *mac,
-					struct ieee80211_vif *vif)
-{
-	struct iwl_mvm_vif *mvm_vif = iwl_mvm_vif_from_mac80211(vif);
-	bool *lqm_active = _data;
-
-	*lqm_active = *lqm_active || mvm_vif->lqm_active;
-}
-
-bool iwl_mvm_lqm_active(struct iwl_mvm *mvm)
-{
-	bool ret = false;
-
-	lockdep_assert_held(&mvm->mutex);
-	ieee80211_iterate_active_interfaces_atomic(
-		mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
-		iwl_mvm_lqm_active_iterator, &ret);
-
-	return ret;
-}