drivers/net/wireless/iwlwifi/mvm/debugfs-vif.c - kernel/msm-4.19 - Gitiles

 /******************************************************************************
  *
  * This file is provided under a dual BSD/GPLv2 license.  When using or
  * redistributing this file, you may do so under either license.
  *
  * GPL LICENSE SUMMARY
  *
  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of version 2 of the GNU General Public License as
  * published by the Free Software Foundation.
  *
  * This program is distributed in the hope that it will be useful, but
  * WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  * USA
  *
  * The full GNU General Public License is included in this distribution
  * in the file called COPYING.
  *
  * Contact Information:
  *  Intel Linux Wireless <ilw@linux.intel.com>
  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  *
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  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  * All rights reserved.
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  *  * Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  *  * Redistributions in binary form must reproduce the above copyright
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  *    the documentation and/or other materials provided with the
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  *    from this software without specific prior written permission.
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  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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  *****************************************************************************/
 #include "mvm.h"
 #include "debugfs.h"

 static void iwl_dbgfs_update_pm(struct iwl_mvm *mvm,
 				 struct ieee80211_vif *vif,
 				 enum iwl_dbgfs_pm_mask param, int val)
 {
 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 	struct iwl_dbgfs_pm *dbgfs_pm = &mvmvif->dbgfs_pm;

 	dbgfs_pm->mask |= param;

 	switch (param) {
 	case MVM_DEBUGFS_PM_KEEP_ALIVE: {
 		int dtimper = vif->bss_conf.dtim_period ?: 1;
 		int dtimper_msec = dtimper * vif->bss_conf.beacon_int;

 		IWL_DEBUG_POWER(mvm, "debugfs: set keep_alive= %d sec\n", val);
 		if (val * MSEC_PER_SEC < 3 * dtimper_msec)
 			IWL_WARN(mvm,
 				 "debugfs: keep alive period (%ld msec) is less than minimum required (%d msec)\n",
 				 val * MSEC_PER_SEC, 3 * dtimper_msec);
 		dbgfs_pm->keep_alive_seconds = val;
 		break;
 	}
 	case MVM_DEBUGFS_PM_SKIP_OVER_DTIM:
 		IWL_DEBUG_POWER(mvm, "skip_over_dtim %s\n",
 				val ? "enabled" : "disabled");
 		dbgfs_pm->skip_over_dtim = val;
 		break;
 	case MVM_DEBUGFS_PM_SKIP_DTIM_PERIODS:
 		IWL_DEBUG_POWER(mvm, "skip_dtim_periods=%d\n", val);
 		dbgfs_pm->skip_dtim_periods = val;
 		break;
 	case MVM_DEBUGFS_PM_RX_DATA_TIMEOUT:
 		IWL_DEBUG_POWER(mvm, "rx_data_timeout=%d\n", val);
 		dbgfs_pm->rx_data_timeout = val;
 		break;
 	case MVM_DEBUGFS_PM_TX_DATA_TIMEOUT:
 		IWL_DEBUG_POWER(mvm, "tx_data_timeout=%d\n", val);
 		dbgfs_pm->tx_data_timeout = val;
 		break;
 	case MVM_DEBUGFS_PM_LPRX_ENA:
 		IWL_DEBUG_POWER(mvm, "lprx %s\n", val ? "enabled" : "disabled");
 		dbgfs_pm->lprx_ena = val;
 		break;
 	case MVM_DEBUGFS_PM_LPRX_RSSI_THRESHOLD:
 		IWL_DEBUG_POWER(mvm, "lprx_rssi_threshold=%d\n", val);
 		dbgfs_pm->lprx_rssi_threshold = val;
 		break;
 	case MVM_DEBUGFS_PM_SNOOZE_ENABLE:
 		IWL_DEBUG_POWER(mvm, "snooze_enable=%d\n", val);
 		dbgfs_pm->snooze_ena = val;
 		break;
 	case MVM_DEBUGFS_PM_UAPSD_MISBEHAVING:
 		IWL_DEBUG_POWER(mvm, "uapsd_misbehaving_enable=%d\n", val);
 		dbgfs_pm->uapsd_misbehaving = val;
 		break;
 	}
 }

 static ssize_t iwl_dbgfs_pm_params_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;
 	enum iwl_dbgfs_pm_mask param;
 	int val, ret;

 	if (!strncmp("keep_alive=", buf, 11)) {
 		if (sscanf(buf + 11, "%d", &val) != 1)
 			return -EINVAL;
 		param = MVM_DEBUGFS_PM_KEEP_ALIVE;
 	} else if (!strncmp("skip_over_dtim=", buf, 15)) {
 		if (sscanf(buf + 15, "%d", &val) != 1)
 			return -EINVAL;
 		param = MVM_DEBUGFS_PM_SKIP_OVER_DTIM;
 	} else if (!strncmp("skip_dtim_periods=", buf, 18)) {
 		if (sscanf(buf + 18, "%d", &val) != 1)
 			return -EINVAL;
 		param = MVM_DEBUGFS_PM_SKIP_DTIM_PERIODS;
 	} else if (!strncmp("rx_data_timeout=", buf, 16)) {
 		if (sscanf(buf + 16, "%d", &val) != 1)
 			return -EINVAL;
 		param = MVM_DEBUGFS_PM_RX_DATA_TIMEOUT;
 	} else if (!strncmp("tx_data_timeout=", buf, 16)) {
 		if (sscanf(buf + 16, "%d", &val) != 1)
 			return -EINVAL;
 		param = MVM_DEBUGFS_PM_TX_DATA_TIMEOUT;
 	} else if (!strncmp("lprx=", buf, 5)) {
 		if (sscanf(buf + 5, "%d", &val) != 1)
 			return -EINVAL;
 		param = MVM_DEBUGFS_PM_LPRX_ENA;
 	} else if (!strncmp("lprx_rssi_threshold=", buf, 20)) {
 		if (sscanf(buf + 20, "%d", &val) != 1)
 			return -EINVAL;
 		if (val > POWER_LPRX_RSSI_THRESHOLD_MAX || val <
 		    POWER_LPRX_RSSI_THRESHOLD_MIN)
 			return -EINVAL;
 		param = MVM_DEBUGFS_PM_LPRX_RSSI_THRESHOLD;
 	} else if (!strncmp("snooze_enable=", buf, 14)) {
 		if (sscanf(buf + 14, "%d", &val) != 1)
 			return -EINVAL;
 		param = MVM_DEBUGFS_PM_SNOOZE_ENABLE;
 	} else if (!strncmp("uapsd_misbehaving=", buf, 18)) {
 		if (sscanf(buf + 18, "%d", &val) != 1)
 			return -EINVAL;
 		param = MVM_DEBUGFS_PM_UAPSD_MISBEHAVING;
 	} else {
 		return -EINVAL;
 	}

 	mutex_lock(&mvm->mutex);
 	iwl_dbgfs_update_pm(mvm, vif, param, val);
 	ret = iwl_mvm_power_update_mac(mvm);
 	mutex_unlock(&mvm->mutex);

 	return ret ?: count;
 }

 static ssize_t iwl_dbgfs_pm_params_read(struct file *file,
 					char __user *user_buf,
 					size_t count, loff_t *ppos)
 {
 	struct ieee80211_vif *vif = file->private_data;
 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 	struct iwl_mvm *mvm = mvmvif->mvm;
 	char buf[512];
 	int bufsz = sizeof(buf);
 	int pos;

 	pos = iwl_mvm_power_mac_dbgfs_read(mvm, vif, buf, bufsz);

 	return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 }

 static ssize_t iwl_dbgfs_mac_params_read(struct file *file,
 					 char __user *user_buf,
 					 size_t count, loff_t *ppos)
 {
 	struct ieee80211_vif *vif = file->private_data;
 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 	struct iwl_mvm *mvm = mvmvif->mvm;
 	u8 ap_sta_id;
 	struct ieee80211_chanctx_conf *chanctx_conf;
 	char buf[512];
 	int bufsz = sizeof(buf);
 	int pos = 0;
 	int i;

 	mutex_lock(&mvm->mutex);

 	ap_sta_id = mvmvif->ap_sta_id;

 	switch (ieee80211_vif_type_p2p(vif)) {
 	case NL80211_IFTYPE_ADHOC:
 		pos += scnprintf(buf+pos, bufsz-pos, "type: ibss\n");
 		break;
 	case NL80211_IFTYPE_STATION:
 		pos += scnprintf(buf+pos, bufsz-pos, "type: bss\n");
 		break;
 	case NL80211_IFTYPE_AP:
 		pos += scnprintf(buf+pos, bufsz-pos, "type: ap\n");
 		break;
 	case NL80211_IFTYPE_P2P_CLIENT:
 		pos += scnprintf(buf+pos, bufsz-pos, "type: p2p client\n");
 		break;
 	case NL80211_IFTYPE_P2P_GO:
 		pos += scnprintf(buf+pos, bufsz-pos, "type: p2p go\n");
 		break;
 	case NL80211_IFTYPE_P2P_DEVICE:
 		pos += scnprintf(buf+pos, bufsz-pos, "type: p2p dev\n");
 		break;
 	default:
 		break;
 	}

 	pos += scnprintf(buf+pos, bufsz-pos, "mac id/color: %d / %d\n",
 			 mvmvif->id, mvmvif->color);
 	pos += scnprintf(buf+pos, bufsz-pos, "bssid: %pM\n",
 			 vif->bss_conf.bssid);
 	pos += scnprintf(buf+pos, bufsz-pos, "QoS:\n");
 	for (i = 0; i < ARRAY_SIZE(mvmvif->queue_params); i++)
 		pos += scnprintf(buf+pos, bufsz-pos,
 				 "\t%d: txop:%d - cw_min:%d - cw_max = %d - aifs = %d upasd = %d\n",
 				 i, mvmvif->queue_params[i].txop,
 				 mvmvif->queue_params[i].cw_min,
 				 mvmvif->queue_params[i].cw_max,
 				 mvmvif->queue_params[i].aifs,
 				 mvmvif->queue_params[i].uapsd);

 	if (vif->type == NL80211_IFTYPE_STATION &&
 	    ap_sta_id != IWL_MVM_STATION_COUNT) {
 		struct ieee80211_sta *sta;

 		sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[ap_sta_id],
 						lockdep_is_held(&mvm->mutex));
 		if (!IS_ERR_OR_NULL(sta)) {
 			struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;

 			pos += scnprintf(buf+pos, bufsz-pos,
 					 "ap_sta_id %d - reduced Tx power %d\n",
 					 ap_sta_id,
 					 mvm_sta->bt_reduced_txpower);
 		}
 	}

 	rcu_read_lock();
 	chanctx_conf = rcu_dereference(vif->chanctx_conf);
 	if (chanctx_conf)
 		pos += scnprintf(buf+pos, bufsz-pos,
 				 "idle rx chains %d, active rx chains: %d\n",
 				 chanctx_conf->rx_chains_static,
 				 chanctx_conf->rx_chains_dynamic);
 	rcu_read_unlock();

 	mutex_unlock(&mvm->mutex);

 	return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 }

 static void iwl_dbgfs_update_bf(struct ieee80211_vif *vif,
 				enum iwl_dbgfs_bf_mask param, int value)
 {
 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 	struct iwl_dbgfs_bf *dbgfs_bf = &mvmvif->dbgfs_bf;

 	dbgfs_bf->mask |= param;

 	switch (param) {
 	case MVM_DEBUGFS_BF_ENERGY_DELTA:
 		dbgfs_bf->bf_energy_delta = value;
 		break;
 	case MVM_DEBUGFS_BF_ROAMING_ENERGY_DELTA:
 		dbgfs_bf->bf_roaming_energy_delta = value;
 		break;
 	case MVM_DEBUGFS_BF_ROAMING_STATE:
 		dbgfs_bf->bf_roaming_state = value;
 		break;
 	case MVM_DEBUGFS_BF_TEMP_THRESHOLD:
 		dbgfs_bf->bf_temp_threshold = value;
 		break;
 	case MVM_DEBUGFS_BF_TEMP_FAST_FILTER:
 		dbgfs_bf->bf_temp_fast_filter = value;
 		break;
 	case MVM_DEBUGFS_BF_TEMP_SLOW_FILTER:
 		dbgfs_bf->bf_temp_slow_filter = value;
 		break;
 	case MVM_DEBUGFS_BF_ENABLE_BEACON_FILTER:
 		dbgfs_bf->bf_enable_beacon_filter = value;
 		break;
 	case MVM_DEBUGFS_BF_DEBUG_FLAG:
 		dbgfs_bf->bf_debug_flag = value;
 		break;
 	case MVM_DEBUGFS_BF_ESCAPE_TIMER:
 		dbgfs_bf->bf_escape_timer = value;
 		break;
 	case MVM_DEBUGFS_BA_ENABLE_BEACON_ABORT:
 		dbgfs_bf->ba_enable_beacon_abort = value;
 		break;
 	case MVM_DEBUGFS_BA_ESCAPE_TIMER:
 		dbgfs_bf->ba_escape_timer = value;
 		break;
 	}
 }

 static ssize_t iwl_dbgfs_bf_params_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;
 	enum iwl_dbgfs_bf_mask param;
 	int value, ret = 0;

 	if (!strncmp("bf_energy_delta=", buf, 16)) {
 		if (sscanf(buf+16, "%d", &value) != 1)
 			return -EINVAL;
 		if (value < IWL_BF_ENERGY_DELTA_MIN ||
 		    value > IWL_BF_ENERGY_DELTA_MAX)
 			return -EINVAL;
 		param = MVM_DEBUGFS_BF_ENERGY_DELTA;
 	} else if (!strncmp("bf_roaming_energy_delta=", buf, 24)) {
 		if (sscanf(buf+24, "%d", &value) != 1)
 			return -EINVAL;
 		if (value < IWL_BF_ROAMING_ENERGY_DELTA_MIN ||
 		    value > IWL_BF_ROAMING_ENERGY_DELTA_MAX)
 			return -EINVAL;
 		param = MVM_DEBUGFS_BF_ROAMING_ENERGY_DELTA;
 	} else if (!strncmp("bf_roaming_state=", buf, 17)) {
 		if (sscanf(buf+17, "%d", &value) != 1)
 			return -EINVAL;
 		if (value < IWL_BF_ROAMING_STATE_MIN ||
 		    value > IWL_BF_ROAMING_STATE_MAX)
 			return -EINVAL;
 		param = MVM_DEBUGFS_BF_ROAMING_STATE;
 	} else if (!strncmp("bf_temp_threshold=", buf, 18)) {
 		if (sscanf(buf+18, "%d", &value) != 1)
 			return -EINVAL;
 		if (value < IWL_BF_TEMP_THRESHOLD_MIN ||
 		    value > IWL_BF_TEMP_THRESHOLD_MAX)
 			return -EINVAL;
 		param = MVM_DEBUGFS_BF_TEMP_THRESHOLD;
 	} else if (!strncmp("bf_temp_fast_filter=", buf, 20)) {
 		if (sscanf(buf+20, "%d", &value) != 1)
 			return -EINVAL;
 		if (value < IWL_BF_TEMP_FAST_FILTER_MIN ||
 		    value > IWL_BF_TEMP_FAST_FILTER_MAX)
 			return -EINVAL;
 		param = MVM_DEBUGFS_BF_TEMP_FAST_FILTER;
 	} else if (!strncmp("bf_temp_slow_filter=", buf, 20)) {
 		if (sscanf(buf+20, "%d", &value) != 1)
 			return -EINVAL;
 		if (value < IWL_BF_TEMP_SLOW_FILTER_MIN ||
 		    value > IWL_BF_TEMP_SLOW_FILTER_MAX)
 			return -EINVAL;
 		param = MVM_DEBUGFS_BF_TEMP_SLOW_FILTER;
 	} else if (!strncmp("bf_enable_beacon_filter=", buf, 24)) {
 		if (sscanf(buf+24, "%d", &value) != 1)
 			return -EINVAL;
 		if (value < 0 || value > 1)
 			return -EINVAL;
 		param = MVM_DEBUGFS_BF_ENABLE_BEACON_FILTER;
 	} else if (!strncmp("bf_debug_flag=", buf, 14)) {
 		if (sscanf(buf+14, "%d", &value) != 1)
 			return -EINVAL;
 		if (value < 0 || value > 1)
 			return -EINVAL;
 		param = MVM_DEBUGFS_BF_DEBUG_FLAG;
 	} else if (!strncmp("bf_escape_timer=", buf, 16)) {
 		if (sscanf(buf+16, "%d", &value) != 1)
 			return -EINVAL;
 		if (value < IWL_BF_ESCAPE_TIMER_MIN ||
 		    value > IWL_BF_ESCAPE_TIMER_MAX)
 			return -EINVAL;
 		param = MVM_DEBUGFS_BF_ESCAPE_TIMER;
 	} else if (!strncmp("ba_escape_timer=", buf, 16)) {
 		if (sscanf(buf+16, "%d", &value) != 1)
 			return -EINVAL;
 		if (value < IWL_BA_ESCAPE_TIMER_MIN ||
 		    value > IWL_BA_ESCAPE_TIMER_MAX)
 			return -EINVAL;
 		param = MVM_DEBUGFS_BA_ESCAPE_TIMER;
 	} else if (!strncmp("ba_enable_beacon_abort=", buf, 23)) {
 		if (sscanf(buf+23, "%d", &value) != 1)
 			return -EINVAL;
 		if (value < 0 || value > 1)
 			return -EINVAL;
 		param = MVM_DEBUGFS_BA_ENABLE_BEACON_ABORT;
 	} else {
 		return -EINVAL;
 	}

 	mutex_lock(&mvm->mutex);
 	iwl_dbgfs_update_bf(vif, param, value);
 	if (param == MVM_DEBUGFS_BF_ENABLE_BEACON_FILTER && !value)
 		ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
 	else
 		ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
 	mutex_unlock(&mvm->mutex);

 	return ret ?: count;
 }

 static ssize_t iwl_dbgfs_bf_params_read(struct file *file,
 					char __user *user_buf,
 					size_t count, loff_t *ppos)
 {
 	struct ieee80211_vif *vif = file->private_data;
 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 	char buf[256];
 	int pos = 0;
 	const size_t bufsz = sizeof(buf);
 	struct iwl_beacon_filter_cmd cmd = {
 		IWL_BF_CMD_CONFIG_DEFAULTS,
 		.bf_enable_beacon_filter =
 			cpu_to_le32(IWL_BF_ENABLE_BEACON_FILTER_DEFAULT),
 		.ba_enable_beacon_abort =
 			cpu_to_le32(IWL_BA_ENABLE_BEACON_ABORT_DEFAULT),
 	};

 	iwl_mvm_beacon_filter_debugfs_parameters(vif, &cmd);
 	if (mvmvif->bf_data.bf_enabled)
 		cmd.bf_enable_beacon_filter = cpu_to_le32(1);
 	else
 		cmd.bf_enable_beacon_filter = 0;

 	pos += scnprintf(buf+pos, bufsz-pos, "bf_energy_delta = %d\n",
 			 le32_to_cpu(cmd.bf_energy_delta));
 	pos += scnprintf(buf+pos, bufsz-pos, "bf_roaming_energy_delta = %d\n",
 			 le32_to_cpu(cmd.bf_roaming_energy_delta));
 	pos += scnprintf(buf+pos, bufsz-pos, "bf_roaming_state = %d\n",
 			 le32_to_cpu(cmd.bf_roaming_state));
 	pos += scnprintf(buf+pos, bufsz-pos, "bf_temp_threshold = %d\n",
 			 le32_to_cpu(cmd.bf_temp_threshold));
 	pos += scnprintf(buf+pos, bufsz-pos, "bf_temp_fast_filter = %d\n",
 			 le32_to_cpu(cmd.bf_temp_fast_filter));
 	pos += scnprintf(buf+pos, bufsz-pos, "bf_temp_slow_filter = %d\n",
 			 le32_to_cpu(cmd.bf_temp_slow_filter));
 	pos += scnprintf(buf+pos, bufsz-pos, "bf_enable_beacon_filter = %d\n",
 			 le32_to_cpu(cmd.bf_enable_beacon_filter));
 	pos += scnprintf(buf+pos, bufsz-pos, "bf_debug_flag = %d\n",
 			 le32_to_cpu(cmd.bf_debug_flag));
 	pos += scnprintf(buf+pos, bufsz-pos, "bf_escape_timer = %d\n",
 			 le32_to_cpu(cmd.bf_escape_timer));
 	pos += scnprintf(buf+pos, bufsz-pos, "ba_escape_timer = %d\n",
 			 le32_to_cpu(cmd.ba_escape_timer));
 	pos += scnprintf(buf+pos, bufsz-pos, "ba_enable_beacon_abort = %d\n",
 			 le32_to_cpu(cmd.ba_enable_beacon_abort));

 	return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 }

 static ssize_t iwl_dbgfs_low_latency_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;
 	u8 value;
 	int ret;

 	ret = kstrtou8(buf, 0, &value);
 	if (ret)
 		return ret;
 	if (value > 1)
 		return -EINVAL;

 	mutex_lock(&mvm->mutex);
 	iwl_mvm_update_low_latency(mvm, vif, value);
 	mutex_unlock(&mvm->mutex);

 	return count;
 }

 static ssize_t iwl_dbgfs_low_latency_read(struct file *file,
 					  char __user *user_buf,
 					  size_t count, loff_t *ppos)
 {
 	struct ieee80211_vif *vif = file->private_data;
 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 	char buf[3];

 	buf[0] = mvmvif->low_latency ? '1' : '0';
 	buf[1] = '\n';
 	buf[2] = '\0';
 	return simple_read_from_buffer(user_buf, count, ppos, buf, sizeof(buf));
 }

 #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) \
 	_MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz, struct ieee80211_vif)
 #define MVM_DEBUGFS_ADD_FILE_VIF(name, parent, mode) do {		\
 		if (!debugfs_create_file(#name, mode, parent, vif,	\
 					 &iwl_dbgfs_##name##_ops))	\
 			goto err;					\
 	} while (0)

 MVM_DEBUGFS_READ_FILE_OPS(mac_params);
 MVM_DEBUGFS_READ_WRITE_FILE_OPS(pm_params, 32);
 MVM_DEBUGFS_READ_WRITE_FILE_OPS(bf_params, 256);
 MVM_DEBUGFS_READ_WRITE_FILE_OPS(low_latency, 10);

 void iwl_mvm_vif_dbgfs_register(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 {
 	struct dentry *dbgfs_dir = vif->debugfs_dir;
 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 	char buf[100];

 	/*
 	 * Check if debugfs directory already exist before creating it.
 	 * This may happen when, for example, resetting hw or suspend-resume
 	 */
 	if (!dbgfs_dir || mvmvif->dbgfs_dir)
 		return;

 	mvmvif->dbgfs_dir = debugfs_create_dir("iwlmvm", dbgfs_dir);
 	mvmvif->mvm = mvm;

 	if (!mvmvif->dbgfs_dir) {
 		IWL_ERR(mvm, "Failed to create debugfs directory under %s\n",
 			dbgfs_dir->d_name.name);
 		return;
 	}

 	if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM &&
 	    ((vif->type == NL80211_IFTYPE_STATION && !vif->p2p) ||
 	     (vif->type == NL80211_IFTYPE_STATION && vif->p2p &&
 	      mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BSS_P2P_PS_DCM)))
 		MVM_DEBUGFS_ADD_FILE_VIF(pm_params, mvmvif->dbgfs_dir, S_IWUSR |
 					 S_IRUSR);

 	MVM_DEBUGFS_ADD_FILE_VIF(mac_params, mvmvif->dbgfs_dir, S_IRUSR);
 	MVM_DEBUGFS_ADD_FILE_VIF(low_latency, mvmvif->dbgfs_dir,
 				 S_IRUSR | S_IWUSR);

 	if (vif->type == NL80211_IFTYPE_STATION && !vif->p2p &&
 	    mvmvif == mvm->bf_allowed_vif)
 		MVM_DEBUGFS_ADD_FILE_VIF(bf_params, mvmvif->dbgfs_dir,
 					 S_IRUSR | S_IWUSR);

 	/*
 	 * Create symlink for convenience pointing to interface specific
 	 * debugfs entries for the driver. For example, under
 	 * /sys/kernel/debug/iwlwifi/0000\:02\:00.0/iwlmvm/
 	 * find
 	 * netdev:wlan0 -> ../../../ieee80211/phy0/netdev:wlan0/iwlmvm/
 	 */
 	snprintf(buf, 100, "../../../%s/%s/%s/%s",
 		 dbgfs_dir->d_parent->d_parent->d_name.name,
 		 dbgfs_dir->d_parent->d_name.name,
 		 dbgfs_dir->d_name.name,
 		 mvmvif->dbgfs_dir->d_name.name);

 	mvmvif->dbgfs_slink = debugfs_create_symlink(dbgfs_dir->d_name.name,
 						     mvm->debugfs_dir, buf);
 	if (!mvmvif->dbgfs_slink)
 		IWL_ERR(mvm, "Can't create debugfs symbolic link under %s\n",
 			dbgfs_dir->d_name.name);
 	return;
 err:
 	IWL_ERR(mvm, "Can't create debugfs entity\n");
 }

 void iwl_mvm_vif_dbgfs_clean(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 {
 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);

 	debugfs_remove(mvmvif->dbgfs_slink);
 	mvmvif->dbgfs_slink = NULL;

 	debugfs_remove_recursive(mvmvif->dbgfs_dir);
 	mvmvif->dbgfs_dir = NULL;
 }
	/******************************************************************************
	*
	* This file is provided under a dual BSD/GPLv2 license. When using or
	* redistributing this file, you may do so under either license.
	*
	* GPL LICENSE SUMMARY
	*
	* Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of version 2 of the GNU General Public License as
	* published by the Free Software Foundation.
	*
	* This program is distributed in the hope that it will be useful, but
	* WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	* General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, write to the Free Software
	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
	* USA
	*
	* The full GNU General Public License is included in this distribution
	* in the file called COPYING.
	*
	* Contact Information:
	* Intel Linux Wireless <ilw@linux.intel.com>
	* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
	*
	* BSD LICENSE
	*
	* Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
	* All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	* are met:
	*
	* * Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	* * Redistributions in binary form must reproduce the above copyright
	* notice, this list of conditions and the following disclaimer in
	* the documentation and/or other materials provided with the
	* distribution.
	* * Neither the name Intel Corporation nor the names of its
	* contributors may be used to endorse or promote products derived
	* from this software without specific prior written permission.
	*
	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	*
	*****************************************************************************/
	#include "mvm.h"
	#include "debugfs.h"

	static void iwl_dbgfs_update_pm(struct iwl_mvm *mvm,
	struct ieee80211_vif *vif,
	enum iwl_dbgfs_pm_mask param, int val)
	{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	struct iwl_dbgfs_pm *dbgfs_pm = &mvmvif->dbgfs_pm;

	dbgfs_pm->mask \|= param;

	switch (param) {
	case MVM_DEBUGFS_PM_KEEP_ALIVE: {
	int dtimper = vif->bss_conf.dtim_period ?: 1;
	int dtimper_msec = dtimper * vif->bss_conf.beacon_int;

	IWL_DEBUG_POWER(mvm, "debugfs: set keep_alive= %d sec\n", val);
	if (val * MSEC_PER_SEC < 3 * dtimper_msec)
	IWL_WARN(mvm,
	"debugfs: keep alive period (%ld msec) is less than minimum required (%d msec)\n",
	val * MSEC_PER_SEC, 3 * dtimper_msec);
	dbgfs_pm->keep_alive_seconds = val;
	break;
	}
	case MVM_DEBUGFS_PM_SKIP_OVER_DTIM:
	IWL_DEBUG_POWER(mvm, "skip_over_dtim %s\n",
	val ? "enabled" : "disabled");
	dbgfs_pm->skip_over_dtim = val;
	break;
	case MVM_DEBUGFS_PM_SKIP_DTIM_PERIODS:
	IWL_DEBUG_POWER(mvm, "skip_dtim_periods=%d\n", val);
	dbgfs_pm->skip_dtim_periods = val;
	break;
	case MVM_DEBUGFS_PM_RX_DATA_TIMEOUT:
	IWL_DEBUG_POWER(mvm, "rx_data_timeout=%d\n", val);
	dbgfs_pm->rx_data_timeout = val;
	break;
	case MVM_DEBUGFS_PM_TX_DATA_TIMEOUT:
	IWL_DEBUG_POWER(mvm, "tx_data_timeout=%d\n", val);
	dbgfs_pm->tx_data_timeout = val;
	break;
	case MVM_DEBUGFS_PM_LPRX_ENA:
	IWL_DEBUG_POWER(mvm, "lprx %s\n", val ? "enabled" : "disabled");
	dbgfs_pm->lprx_ena = val;
	break;
	case MVM_DEBUGFS_PM_LPRX_RSSI_THRESHOLD:
	IWL_DEBUG_POWER(mvm, "lprx_rssi_threshold=%d\n", val);
	dbgfs_pm->lprx_rssi_threshold = val;
	break;
	case MVM_DEBUGFS_PM_SNOOZE_ENABLE:
	IWL_DEBUG_POWER(mvm, "snooze_enable=%d\n", val);
	dbgfs_pm->snooze_ena = val;
	break;
	case MVM_DEBUGFS_PM_UAPSD_MISBEHAVING:
	IWL_DEBUG_POWER(mvm, "uapsd_misbehaving_enable=%d\n", val);
	dbgfs_pm->uapsd_misbehaving = val;
	break;
	}
	}

	static ssize_t iwl_dbgfs_pm_params_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;
	enum iwl_dbgfs_pm_mask param;
	int val, ret;

	if (!strncmp("keep_alive=", buf, 11)) {
	if (sscanf(buf + 11, "%d", &val) != 1)
	return -EINVAL;
	param = MVM_DEBUGFS_PM_KEEP_ALIVE;
	} else if (!strncmp("skip_over_dtim=", buf, 15)) {
	if (sscanf(buf + 15, "%d", &val) != 1)
	return -EINVAL;
	param = MVM_DEBUGFS_PM_SKIP_OVER_DTIM;
	} else if (!strncmp("skip_dtim_periods=", buf, 18)) {
	if (sscanf(buf + 18, "%d", &val) != 1)
	return -EINVAL;
	param = MVM_DEBUGFS_PM_SKIP_DTIM_PERIODS;
	} else if (!strncmp("rx_data_timeout=", buf, 16)) {
	if (sscanf(buf + 16, "%d", &val) != 1)
	return -EINVAL;
	param = MVM_DEBUGFS_PM_RX_DATA_TIMEOUT;
	} else if (!strncmp("tx_data_timeout=", buf, 16)) {
	if (sscanf(buf + 16, "%d", &val) != 1)
	return -EINVAL;
	param = MVM_DEBUGFS_PM_TX_DATA_TIMEOUT;
	} else if (!strncmp("lprx=", buf, 5)) {
	if (sscanf(buf + 5, "%d", &val) != 1)
	return -EINVAL;
	param = MVM_DEBUGFS_PM_LPRX_ENA;
	} else if (!strncmp("lprx_rssi_threshold=", buf, 20)) {
	if (sscanf(buf + 20, "%d", &val) != 1)
	return -EINVAL;
	if (val > POWER_LPRX_RSSI_THRESHOLD_MAX \|\| val <
	POWER_LPRX_RSSI_THRESHOLD_MIN)
	return -EINVAL;
	param = MVM_DEBUGFS_PM_LPRX_RSSI_THRESHOLD;
	} else if (!strncmp("snooze_enable=", buf, 14)) {
	if (sscanf(buf + 14, "%d", &val) != 1)
	return -EINVAL;
	param = MVM_DEBUGFS_PM_SNOOZE_ENABLE;
	} else if (!strncmp("uapsd_misbehaving=", buf, 18)) {
	if (sscanf(buf + 18, "%d", &val) != 1)
	return -EINVAL;
	param = MVM_DEBUGFS_PM_UAPSD_MISBEHAVING;
	} else {
	return -EINVAL;
	}

	mutex_lock(&mvm->mutex);
	iwl_dbgfs_update_pm(mvm, vif, param, val);
	ret = iwl_mvm_power_update_mac(mvm);
	mutex_unlock(&mvm->mutex);

	return ret ?: count;
	}

	static ssize_t iwl_dbgfs_pm_params_read(struct file *file,
	char __user *user_buf,
	size_t count, loff_t *ppos)
	{
	struct ieee80211_vif *vif = file->private_data;
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	struct iwl_mvm *mvm = mvmvif->mvm;
	char buf[512];
	int bufsz = sizeof(buf);
	int pos;

	pos = iwl_mvm_power_mac_dbgfs_read(mvm, vif, buf, bufsz);

	return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
	}

	static ssize_t iwl_dbgfs_mac_params_read(struct file *file,
	char __user *user_buf,
	size_t count, loff_t *ppos)
	{
	struct ieee80211_vif *vif = file->private_data;
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	struct iwl_mvm *mvm = mvmvif->mvm;
	u8 ap_sta_id;
	struct ieee80211_chanctx_conf *chanctx_conf;
	char buf[512];
	int bufsz = sizeof(buf);
	int pos = 0;
	int i;

	mutex_lock(&mvm->mutex);

	ap_sta_id = mvmvif->ap_sta_id;

	switch (ieee80211_vif_type_p2p(vif)) {
	case NL80211_IFTYPE_ADHOC:
	pos += scnprintf(buf+pos, bufsz-pos, "type: ibss\n");
	break;
	case NL80211_IFTYPE_STATION:
	pos += scnprintf(buf+pos, bufsz-pos, "type: bss\n");
	break;
	case NL80211_IFTYPE_AP:
	pos += scnprintf(buf+pos, bufsz-pos, "type: ap\n");
	break;
	case NL80211_IFTYPE_P2P_CLIENT:
	pos += scnprintf(buf+pos, bufsz-pos, "type: p2p client\n");
	break;
	case NL80211_IFTYPE_P2P_GO:
	pos += scnprintf(buf+pos, bufsz-pos, "type: p2p go\n");
	break;
	case NL80211_IFTYPE_P2P_DEVICE:
	pos += scnprintf(buf+pos, bufsz-pos, "type: p2p dev\n");
	break;
	default:
	break;
	}

	pos += scnprintf(buf+pos, bufsz-pos, "mac id/color: %d / %d\n",
	mvmvif->id, mvmvif->color);
	pos += scnprintf(buf+pos, bufsz-pos, "bssid: %pM\n",
	vif->bss_conf.bssid);
	pos += scnprintf(buf+pos, bufsz-pos, "QoS:\n");
	for (i = 0; i < ARRAY_SIZE(mvmvif->queue_params); i++)
	pos += scnprintf(buf+pos, bufsz-pos,
	"\t%d: txop:%d - cw_min:%d - cw_max = %d - aifs = %d upasd = %d\n",
	i, mvmvif->queue_params[i].txop,
	mvmvif->queue_params[i].cw_min,
	mvmvif->queue_params[i].cw_max,
	mvmvif->queue_params[i].aifs,
	mvmvif->queue_params[i].uapsd);

	if (vif->type == NL80211_IFTYPE_STATION &&
	ap_sta_id != IWL_MVM_STATION_COUNT) {
	struct ieee80211_sta *sta;

	sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[ap_sta_id],
	lockdep_is_held(&mvm->mutex));
	if (!IS_ERR_OR_NULL(sta)) {
	struct iwl_mvm_sta mvm_sta = (void )sta->drv_priv;

	pos += scnprintf(buf+pos, bufsz-pos,
	"ap_sta_id %d - reduced Tx power %d\n",
	ap_sta_id,
	mvm_sta->bt_reduced_txpower);
	}
	}

	rcu_read_lock();
	chanctx_conf = rcu_dereference(vif->chanctx_conf);
	if (chanctx_conf)
	pos += scnprintf(buf+pos, bufsz-pos,
	"idle rx chains %d, active rx chains: %d\n",
	chanctx_conf->rx_chains_static,
	chanctx_conf->rx_chains_dynamic);
	rcu_read_unlock();

	mutex_unlock(&mvm->mutex);

	return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
	}

	static void iwl_dbgfs_update_bf(struct ieee80211_vif *vif,
	enum iwl_dbgfs_bf_mask param, int value)
	{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	struct iwl_dbgfs_bf *dbgfs_bf = &mvmvif->dbgfs_bf;

	dbgfs_bf->mask \|= param;

	switch (param) {
	case MVM_DEBUGFS_BF_ENERGY_DELTA:
	dbgfs_bf->bf_energy_delta = value;
	break;
	case MVM_DEBUGFS_BF_ROAMING_ENERGY_DELTA:
	dbgfs_bf->bf_roaming_energy_delta = value;
	break;
	case MVM_DEBUGFS_BF_ROAMING_STATE:
	dbgfs_bf->bf_roaming_state = value;
	break;
	case MVM_DEBUGFS_BF_TEMP_THRESHOLD:
	dbgfs_bf->bf_temp_threshold = value;
	break;
	case MVM_DEBUGFS_BF_TEMP_FAST_FILTER:
	dbgfs_bf->bf_temp_fast_filter = value;
	break;
	case MVM_DEBUGFS_BF_TEMP_SLOW_FILTER:
	dbgfs_bf->bf_temp_slow_filter = value;
	break;
	case MVM_DEBUGFS_BF_ENABLE_BEACON_FILTER:
	dbgfs_bf->bf_enable_beacon_filter = value;
	break;
	case MVM_DEBUGFS_BF_DEBUG_FLAG:
	dbgfs_bf->bf_debug_flag = value;
	break;
	case MVM_DEBUGFS_BF_ESCAPE_TIMER:
	dbgfs_bf->bf_escape_timer = value;
	break;
	case MVM_DEBUGFS_BA_ENABLE_BEACON_ABORT:
	dbgfs_bf->ba_enable_beacon_abort = value;
	break;
	case MVM_DEBUGFS_BA_ESCAPE_TIMER:
	dbgfs_bf->ba_escape_timer = value;
	break;
	}
	}

	static ssize_t iwl_dbgfs_bf_params_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;
	enum iwl_dbgfs_bf_mask param;
	int value, ret = 0;

	if (!strncmp("bf_energy_delta=", buf, 16)) {
	if (sscanf(buf+16, "%d", &value) != 1)
	return -EINVAL;
	if (value < IWL_BF_ENERGY_DELTA_MIN \|\|
	value > IWL_BF_ENERGY_DELTA_MAX)
	return -EINVAL;
	param = MVM_DEBUGFS_BF_ENERGY_DELTA;
	} else if (!strncmp("bf_roaming_energy_delta=", buf, 24)) {
	if (sscanf(buf+24, "%d", &value) != 1)
	return -EINVAL;
	if (value < IWL_BF_ROAMING_ENERGY_DELTA_MIN \|\|
	value > IWL_BF_ROAMING_ENERGY_DELTA_MAX)
	return -EINVAL;
	param = MVM_DEBUGFS_BF_ROAMING_ENERGY_DELTA;
	} else if (!strncmp("bf_roaming_state=", buf, 17)) {
	if (sscanf(buf+17, "%d", &value) != 1)
	return -EINVAL;
	if (value < IWL_BF_ROAMING_STATE_MIN \|\|
	value > IWL_BF_ROAMING_STATE_MAX)
	return -EINVAL;
	param = MVM_DEBUGFS_BF_ROAMING_STATE;
	} else if (!strncmp("bf_temp_threshold=", buf, 18)) {
	if (sscanf(buf+18, "%d", &value) != 1)
	return -EINVAL;
	if (value < IWL_BF_TEMP_THRESHOLD_MIN \|\|
	value > IWL_BF_TEMP_THRESHOLD_MAX)
	return -EINVAL;
	param = MVM_DEBUGFS_BF_TEMP_THRESHOLD;
	} else if (!strncmp("bf_temp_fast_filter=", buf, 20)) {
	if (sscanf(buf+20, "%d", &value) != 1)
	return -EINVAL;
	if (value < IWL_BF_TEMP_FAST_FILTER_MIN \|\|
	value > IWL_BF_TEMP_FAST_FILTER_MAX)
	return -EINVAL;
	param = MVM_DEBUGFS_BF_TEMP_FAST_FILTER;
	} else if (!strncmp("bf_temp_slow_filter=", buf, 20)) {
	if (sscanf(buf+20, "%d", &value) != 1)
	return -EINVAL;
	if (value < IWL_BF_TEMP_SLOW_FILTER_MIN \|\|
	value > IWL_BF_TEMP_SLOW_FILTER_MAX)
	return -EINVAL;
	param = MVM_DEBUGFS_BF_TEMP_SLOW_FILTER;
	} else if (!strncmp("bf_enable_beacon_filter=", buf, 24)) {
	if (sscanf(buf+24, "%d", &value) != 1)
	return -EINVAL;
	if (value < 0 \|\| value > 1)
	return -EINVAL;
	param = MVM_DEBUGFS_BF_ENABLE_BEACON_FILTER;
	} else if (!strncmp("bf_debug_flag=", buf, 14)) {
	if (sscanf(buf+14, "%d", &value) != 1)
	return -EINVAL;
	if (value < 0 \|\| value > 1)
	return -EINVAL;
	param = MVM_DEBUGFS_BF_DEBUG_FLAG;
	} else if (!strncmp("bf_escape_timer=", buf, 16)) {
	if (sscanf(buf+16, "%d", &value) != 1)
	return -EINVAL;
	if (value < IWL_BF_ESCAPE_TIMER_MIN \|\|
	value > IWL_BF_ESCAPE_TIMER_MAX)
	return -EINVAL;
	param = MVM_DEBUGFS_BF_ESCAPE_TIMER;
	} else if (!strncmp("ba_escape_timer=", buf, 16)) {
	if (sscanf(buf+16, "%d", &value) != 1)
	return -EINVAL;
	if (value < IWL_BA_ESCAPE_TIMER_MIN \|\|
	value > IWL_BA_ESCAPE_TIMER_MAX)
	return -EINVAL;
	param = MVM_DEBUGFS_BA_ESCAPE_TIMER;
	} else if (!strncmp("ba_enable_beacon_abort=", buf, 23)) {
	if (sscanf(buf+23, "%d", &value) != 1)
	return -EINVAL;
	if (value < 0 \|\| value > 1)
	return -EINVAL;
	param = MVM_DEBUGFS_BA_ENABLE_BEACON_ABORT;
	} else {
	return -EINVAL;
	}

	mutex_lock(&mvm->mutex);
	iwl_dbgfs_update_bf(vif, param, value);
	if (param == MVM_DEBUGFS_BF_ENABLE_BEACON_FILTER && !value)
	ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
	else
	ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
	mutex_unlock(&mvm->mutex);

	return ret ?: count;
	}

	static ssize_t iwl_dbgfs_bf_params_read(struct file *file,
	char __user *user_buf,
	size_t count, loff_t *ppos)
	{
	struct ieee80211_vif *vif = file->private_data;
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	char buf[256];
	int pos = 0;
	const size_t bufsz = sizeof(buf);
	struct iwl_beacon_filter_cmd cmd = {
	IWL_BF_CMD_CONFIG_DEFAULTS,
	.bf_enable_beacon_filter =
	cpu_to_le32(IWL_BF_ENABLE_BEACON_FILTER_DEFAULT),
	.ba_enable_beacon_abort =
	cpu_to_le32(IWL_BA_ENABLE_BEACON_ABORT_DEFAULT),
	};

	iwl_mvm_beacon_filter_debugfs_parameters(vif, &cmd);
	if (mvmvif->bf_data.bf_enabled)
	cmd.bf_enable_beacon_filter = cpu_to_le32(1);
	else
	cmd.bf_enable_beacon_filter = 0;

	pos += scnprintf(buf+pos, bufsz-pos, "bf_energy_delta = %d\n",
	le32_to_cpu(cmd.bf_energy_delta));
	pos += scnprintf(buf+pos, bufsz-pos, "bf_roaming_energy_delta = %d\n",
	le32_to_cpu(cmd.bf_roaming_energy_delta));
	pos += scnprintf(buf+pos, bufsz-pos, "bf_roaming_state = %d\n",
	le32_to_cpu(cmd.bf_roaming_state));
	pos += scnprintf(buf+pos, bufsz-pos, "bf_temp_threshold = %d\n",
	le32_to_cpu(cmd.bf_temp_threshold));
	pos += scnprintf(buf+pos, bufsz-pos, "bf_temp_fast_filter = %d\n",
	le32_to_cpu(cmd.bf_temp_fast_filter));
	pos += scnprintf(buf+pos, bufsz-pos, "bf_temp_slow_filter = %d\n",
	le32_to_cpu(cmd.bf_temp_slow_filter));
	pos += scnprintf(buf+pos, bufsz-pos, "bf_enable_beacon_filter = %d\n",
	le32_to_cpu(cmd.bf_enable_beacon_filter));
	pos += scnprintf(buf+pos, bufsz-pos, "bf_debug_flag = %d\n",
	le32_to_cpu(cmd.bf_debug_flag));
	pos += scnprintf(buf+pos, bufsz-pos, "bf_escape_timer = %d\n",
	le32_to_cpu(cmd.bf_escape_timer));
	pos += scnprintf(buf+pos, bufsz-pos, "ba_escape_timer = %d\n",
	le32_to_cpu(cmd.ba_escape_timer));
	pos += scnprintf(buf+pos, bufsz-pos, "ba_enable_beacon_abort = %d\n",
	le32_to_cpu(cmd.ba_enable_beacon_abort));

	return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
	}

	static ssize_t iwl_dbgfs_low_latency_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;
	u8 value;
	int ret;

	ret = kstrtou8(buf, 0, &value);
	if (ret)
	return ret;
	if (value > 1)
	return -EINVAL;

	mutex_lock(&mvm->mutex);
	iwl_mvm_update_low_latency(mvm, vif, value);
	mutex_unlock(&mvm->mutex);

	return count;
	}

	static ssize_t iwl_dbgfs_low_latency_read(struct file *file,
	char __user *user_buf,
	size_t count, loff_t *ppos)
	{
	struct ieee80211_vif *vif = file->private_data;
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	char buf[3];

	buf[0] = mvmvif->low_latency ? '1' : '0';
	buf[1] = '\n';
	buf[2] = '\0';
	return simple_read_from_buffer(user_buf, count, ppos, buf, sizeof(buf));
	}

	#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) \
	_MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz, struct ieee80211_vif)
	#define MVM_DEBUGFS_ADD_FILE_VIF(name, parent, mode) do { \
	if (!debugfs_create_file(#name, mode, parent, vif, \
	&iwl_dbgfs_##name##_ops)) \
	goto err; \
	} while (0)

	MVM_DEBUGFS_READ_FILE_OPS(mac_params);
	MVM_DEBUGFS_READ_WRITE_FILE_OPS(pm_params, 32);
	MVM_DEBUGFS_READ_WRITE_FILE_OPS(bf_params, 256);
	MVM_DEBUGFS_READ_WRITE_FILE_OPS(low_latency, 10);

	void iwl_mvm_vif_dbgfs_register(struct iwl_mvm mvm, struct ieee80211_vif vif)
	{
	struct dentry *dbgfs_dir = vif->debugfs_dir;
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	char buf[100];

	/*
	* Check if debugfs directory already exist before creating it.
	* This may happen when, for example, resetting hw or suspend-resume
	*/
	if (!dbgfs_dir \|\| mvmvif->dbgfs_dir)
	return;

	mvmvif->dbgfs_dir = debugfs_create_dir("iwlmvm", dbgfs_dir);
	mvmvif->mvm = mvm;

	if (!mvmvif->dbgfs_dir) {
	IWL_ERR(mvm, "Failed to create debugfs directory under %s\n",
	dbgfs_dir->d_name.name);
	return;
	}

	if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM &&
	((vif->type == NL80211_IFTYPE_STATION && !vif->p2p) \|\|
	(vif->type == NL80211_IFTYPE_STATION && vif->p2p &&
	mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BSS_P2P_PS_DCM)))
	MVM_DEBUGFS_ADD_FILE_VIF(pm_params, mvmvif->dbgfs_dir, S_IWUSR \|
	S_IRUSR);

	MVM_DEBUGFS_ADD_FILE_VIF(mac_params, mvmvif->dbgfs_dir, S_IRUSR);
	MVM_DEBUGFS_ADD_FILE_VIF(low_latency, mvmvif->dbgfs_dir,
	S_IRUSR \| S_IWUSR);

	if (vif->type == NL80211_IFTYPE_STATION && !vif->p2p &&
	mvmvif == mvm->bf_allowed_vif)
	MVM_DEBUGFS_ADD_FILE_VIF(bf_params, mvmvif->dbgfs_dir,
	S_IRUSR \| S_IWUSR);

	/*
	* Create symlink for convenience pointing to interface specific
	* debugfs entries for the driver. For example, under
	* /sys/kernel/debug/iwlwifi/0000\:02\:00.0/iwlmvm/
	* find
	* netdev:wlan0 -> ../../../ieee80211/phy0/netdev:wlan0/iwlmvm/
	*/
	snprintf(buf, 100, "../../../%s/%s/%s/%s",
	dbgfs_dir->d_parent->d_parent->d_name.name,
	dbgfs_dir->d_parent->d_name.name,
	dbgfs_dir->d_name.name,
	mvmvif->dbgfs_dir->d_name.name);

	mvmvif->dbgfs_slink = debugfs_create_symlink(dbgfs_dir->d_name.name,
	mvm->debugfs_dir, buf);
	if (!mvmvif->dbgfs_slink)
	IWL_ERR(mvm, "Can't create debugfs symbolic link under %s\n",
	dbgfs_dir->d_name.name);
	return;
	err:
	IWL_ERR(mvm, "Can't create debugfs entity\n");
	}

	void iwl_mvm_vif_dbgfs_clean(struct iwl_mvm mvm, struct ieee80211_vif vif)
	{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);

	debugfs_remove(mvmvif->dbgfs_slink);
	mvmvif->dbgfs_slink = NULL;

	debugfs_remove_recursive(mvmvif->dbgfs_dir);
	mvmvif->dbgfs_dir = NULL;
	}