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Commit dedfc0f3 authored by Aviya Erenfeld's avatar Aviya Erenfeld Committed by Emmanuel Grumbach
Browse files

iwlwifi: add a debugfs hook for LQM 



Add debugfs entry named lqm_send_cmd for kicking a
measurement. This hook takes the duration and the timeout
as parameter.

Signed-off-by: default avatarAviya Erenfeld <aviya.erenfeld@intel.com>
Signed-off-by: default avatarEmmanuel Grumbach <emmanuel.grumbach@intel.com>
parent 03098268

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

+85 −0
Original line number Diff line number Diff line
@@ -1425,6 +1425,89 @@ static ssize_t iwl_dbgfs_quota_min_read(struct file *file, 
	return simple_read_from_buffer(user_buf, count, ppos, buf, len);

}



static const char * const chanwidths[] = {

	[NL80211_CHAN_WIDTH_20_NOHT] = "noht",

	[NL80211_CHAN_WIDTH_20] = "ht20",

	[NL80211_CHAN_WIDTH_40] = "ht40",

	[NL80211_CHAN_WIDTH_80] = "vht80",

	[NL80211_CHAN_WIDTH_80P80] = "vht80p80",

	[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) \
@@ -1449,6 +1532,7 @@ 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);



void iwl_mvm_vif_dbgfs_register(struct iwl_mvm *mvm, struct ieee80211_vif *vif)

{
@@ -1488,6 +1572,7 @@ 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);



	if (vif->type == NL80211_IFTYPE_STATION && !vif->p2p &&

	    mvmvif == mvm->bf_allowed_vif)