[deliverable/linux.git] / net / mac80211 / debugfs.c


/*
 * mac80211 debugfs for wireless PHYs
 *
 * Copyright 2007	Johannes Berg <johannes@sipsolutions.net>
 * Copyright 2013-2014  Intel Mobile Communications GmbH
 *
 * GPLv2
 *
 */

#include <linux/debugfs.h>
#include <linux/rtnetlink.h>
#include "ieee80211_i.h"
#include "driver-ops.h"
#include "rate.h"
#include "debugfs.h"

#define DEBUGFS_FORMAT_BUFFER_SIZE 100

#define TX_LATENCY_BIN_DELIMTER_C ','
#define TX_LATENCY_BIN_DELIMTER_S ","
#define TX_LATENCY_BINS_DISABLED "enable(bins disabled)\n"
#define TX_LATENCY_DISABLED "disable\n"


/*
 * Display if Tx latency statistics & bins are enabled/disabled
 */
static ssize_t sta_tx_latency_stat_read(struct file *file,
					char __user *userbuf,
					size_t count, loff_t *ppos)
{
	struct ieee80211_local *local = file->private_data;
	struct ieee80211_tx_latency_bin_ranges  *tx_latency;
	char *buf;
	int bufsz, i, ret;
	int pos = 0;

	rcu_read_lock();

	tx_latency = rcu_dereference(local->tx_latency);

	if (tx_latency && tx_latency->n_ranges) {
		bufsz = tx_latency->n_ranges * 15;
		buf = kzalloc(bufsz, GFP_ATOMIC);
		if (!buf)
			goto err;

		for (i = 0; i < tx_latency->n_ranges; i++)
			pos += scnprintf(buf + pos, bufsz - pos, "%d,",
					 tx_latency->ranges[i]);
		pos += scnprintf(buf + pos, bufsz - pos, "\n");
	} else if (tx_latency) {
		bufsz = sizeof(TX_LATENCY_BINS_DISABLED) + 1;
		buf = kzalloc(bufsz, GFP_ATOMIC);
		if (!buf)
			goto err;

		pos += scnprintf(buf + pos, bufsz - pos, "%s\n",
				 TX_LATENCY_BINS_DISABLED);
	} else {
		bufsz = sizeof(TX_LATENCY_DISABLED) + 1;
		buf = kzalloc(bufsz, GFP_ATOMIC);
		if (!buf)
			goto err;

		pos += scnprintf(buf + pos, bufsz - pos, "%s\n",
				 TX_LATENCY_DISABLED);
	}

	rcu_read_unlock();

	ret = simple_read_from_buffer(userbuf, count, ppos, buf, pos);
	kfree(buf);

	return ret;
err:
	rcu_read_unlock();
	return -ENOMEM;
}

/*
 * Receive input from user regarding Tx latency statistics
 * The input should indicate if Tx latency statistics and bins are
 * enabled/disabled.
 * If bins are enabled input should indicate the amount of different bins and
 * their ranges. Each bin will count how many Tx frames transmitted within the
 * appropriate latency.
 * Legal input is:
 * a) "enable(bins disabled)" - to enable only general statistics
 * b) "a,b,c,d,...z" - to enable general statistics and bins, where all are
 * numbers and a < b < c < d.. < z
 * c) "disable" - disable all statistics
 * NOTE: must configure Tx latency statistics bins before stations connected.
 */

static ssize_t sta_tx_latency_stat_write(struct file *file,
					 const char __user *userbuf,
					 size_t count, loff_t *ppos)
{
	struct ieee80211_local *local = file->private_data;
	char buf[128] = {};
	char *bins = buf;
	char *token;
	int buf_size, i, alloc_size;
	int prev_bin = 0;
	int n_ranges = 0;
	int ret = count;
	struct ieee80211_tx_latency_bin_ranges  *tx_latency;

	if (sizeof(buf) <= count)
		return -EINVAL;
	buf_size = count;
	if (copy_from_user(buf, userbuf, buf_size))
		return -EFAULT;

	mutex_lock(&local->sta_mtx);

	/* cannot change config once we have stations */
	if (local->num_sta)
		goto unlock;

	tx_latency =
		rcu_dereference_protected(local->tx_latency,
					  lockdep_is_held(&local->sta_mtx));

	/* disable Tx statistics */
	if (!strcmp(buf, TX_LATENCY_DISABLED)) {
		if (!tx_latency)
			goto unlock;
		RCU_INIT_POINTER(local->tx_latency, NULL);
		synchronize_rcu();
		kfree(tx_latency);
		goto unlock;
	}

	/* Tx latency already enabled */
	if (tx_latency)
		goto unlock;

	if (strcmp(TX_LATENCY_BINS_DISABLED, buf)) {
		/* check how many bins and between what ranges user requested */
		token = buf;
		while (*token != '\0') {
			if (*token == TX_LATENCY_BIN_DELIMTER_C)
				n_ranges++;
			token++;
		}
		n_ranges++;
	}

	alloc_size = sizeof(struct ieee80211_tx_latency_bin_ranges) +
		     n_ranges * sizeof(u32);
	tx_latency = kzalloc(alloc_size, GFP_ATOMIC);
	if (!tx_latency) {
		ret = -ENOMEM;
		goto unlock;
	}
	tx_latency->n_ranges = n_ranges;
	for (i = 0; i < n_ranges; i++) { /* setting bin ranges */
		token = strsep(&bins, TX_LATENCY_BIN_DELIMTER_S);
		sscanf(token, "%d", &tx_latency->ranges[i]);
		/* bins values should be in ascending order */
		if (prev_bin >= tx_latency->ranges[i]) {
			ret = -EINVAL;
			kfree(tx_latency);
			goto unlock;
		}
		prev_bin = tx_latency->ranges[i];
	}
	rcu_assign_pointer(local->tx_latency, tx_latency);

unlock:
	mutex_unlock(&local->sta_mtx);

	return ret;
}

static const struct file_operations stats_tx_latency_ops = {
	.write = sta_tx_latency_stat_write,
	.read = sta_tx_latency_stat_read,
	.open = simple_open,
	.llseek = generic_file_llseek,
};

int mac80211_format_buffer(char __user *userbuf, size_t count,
				  loff_t *ppos, char *fmt, ...)
{
	va_list args;
	char buf[DEBUGFS_FORMAT_BUFFER_SIZE];
	int res;

	va_start(args, fmt);
	res = vscnprintf(buf, sizeof(buf), fmt, args);
	va_end(args);

	return simple_read_from_buffer(userbuf, count, ppos, buf, res);
}

#define DEBUGFS_READONLY_FILE_FN(name, fmt, value...)			\
static ssize_t name## _read(struct file *file, char __user *userbuf,	\
			    size_t count, loff_t *ppos)			\
{									\
	struct ieee80211_local *local = file->private_data;		\
									\
	return mac80211_format_buffer(userbuf, count, ppos, 		\
				      fmt "\n", ##value);		\
}

#define DEBUGFS_READONLY_FILE_OPS(name)			\
static const struct file_operations name## _ops = {			\
	.read = name## _read,						\
	.open = simple_open,						\
	.llseek = generic_file_llseek,					\
};

#define DEBUGFS_READONLY_FILE(name, fmt, value...)		\
	DEBUGFS_READONLY_FILE_FN(name, fmt, value)		\
	DEBUGFS_READONLY_FILE_OPS(name)

#define DEBUGFS_ADD(name)						\
	debugfs_create_file(#name, 0400, phyd, local, &name## _ops);

#define DEBUGFS_ADD_MODE(name, mode)					\
	debugfs_create_file(#name, mode, phyd, local, &name## _ops);


DEBUGFS_READONLY_FILE(user_power, "%d",
		      local->user_power_level);
DEBUGFS_READONLY_FILE(power, "%d",
		      local->hw.conf.power_level);
DEBUGFS_READONLY_FILE(total_ps_buffered, "%d",
		      local->total_ps_buffered);
DEBUGFS_READONLY_FILE(wep_iv, "%#08x",
		      local->wep_iv & 0xffffff);
DEBUGFS_READONLY_FILE(rate_ctrl_alg, "%s",
	local->rate_ctrl ? local->rate_ctrl->ops->name : "hw/driver");

#ifdef CONFIG_PM
static ssize_t reset_write(struct file *file, const char __user *user_buf,
			   size_t count, loff_t *ppos)
{
	struct ieee80211_local *local = file->private_data;

	rtnl_lock();
	__ieee80211_suspend(&local->hw, NULL);
	__ieee80211_resume(&local->hw);
	rtnl_unlock();

	return count;
}

static const struct file_operations reset_ops = {
	.write = reset_write,
	.open = simple_open,
	.llseek = noop_llseek,
};
#endif

static ssize_t hwflags_read(struct file *file, char __user *user_buf,
			    size_t count, loff_t *ppos)
{
	struct ieee80211_local *local = file->private_data;
	int mxln = 500;
	ssize_t rv;
	char *buf = kzalloc(mxln, GFP_KERNEL);
	int sf = 0; /* how many written so far */

	if (!buf)
		return 0;

	sf += scnprintf(buf, mxln - sf, "0x%x\n", local->hw.flags);
	if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)
		sf += scnprintf(buf + sf, mxln - sf, "HAS_RATE_CONTROL\n");
	if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS)
		sf += scnprintf(buf + sf, mxln - sf, "RX_INCLUDES_FCS\n");
	if (local->hw.flags & IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING)
		sf += scnprintf(buf + sf, mxln - sf,
				"HOST_BCAST_PS_BUFFERING\n");
	if (local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)
		sf += scnprintf(buf + sf, mxln - sf,
				"2GHZ_SHORT_SLOT_INCAPABLE\n");
	if (local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)
		sf += scnprintf(buf + sf, mxln - sf,
				"2GHZ_SHORT_PREAMBLE_INCAPABLE\n");
	if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
		sf += scnprintf(buf + sf, mxln - sf, "SIGNAL_UNSPEC\n");
	if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
		sf += scnprintf(buf + sf, mxln - sf, "SIGNAL_DBM\n");
	if (local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC)
		sf += scnprintf(buf + sf, mxln - sf,
				"NEED_DTIM_BEFORE_ASSOC\n");
	if (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT)
		sf += scnprintf(buf + sf, mxln - sf, "SPECTRUM_MGMT\n");
	if (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION)
		sf += scnprintf(buf + sf, mxln - sf, "AMPDU_AGGREGATION\n");
	if (local->hw.flags & IEEE80211_HW_SUPPORTS_PS)
		sf += scnprintf(buf + sf, mxln - sf, "SUPPORTS_PS\n");
	if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
		sf += scnprintf(buf + sf, mxln - sf, "PS_NULLFUNC_STACK\n");
	if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)
		sf += scnprintf(buf + sf, mxln - sf, "SUPPORTS_DYNAMIC_PS\n");
	if (local->hw.flags & IEEE80211_HW_MFP_CAPABLE)
		sf += scnprintf(buf + sf, mxln - sf, "MFP_CAPABLE\n");
	if (local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)
		sf += scnprintf(buf + sf, mxln - sf, "SUPPORTS_UAPSD\n");
	if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
		sf += scnprintf(buf + sf, mxln - sf,
				"REPORTS_TX_ACK_STATUS\n");
	if (local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
		sf += scnprintf(buf + sf, mxln - sf, "CONNECTION_MONITOR\n");
	if (local->hw.flags & IEEE80211_HW_SUPPORTS_PER_STA_GTK)
		sf += scnprintf(buf + sf, mxln - sf, "SUPPORTS_PER_STA_GTK\n");
	if (local->hw.flags & IEEE80211_HW_AP_LINK_PS)
		sf += scnprintf(buf + sf, mxln - sf, "AP_LINK_PS\n");
	if (local->hw.flags & IEEE80211_HW_TX_AMPDU_SETUP_IN_HW)
		sf += scnprintf(buf + sf, mxln - sf, "TX_AMPDU_SETUP_IN_HW\n");

	rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
	kfree(buf);
	return rv;
}

static ssize_t queues_read(struct file *file, char __user *user_buf,
			   size_t count, loff_t *ppos)
{
	struct ieee80211_local *local = file->private_data;
	unsigned long flags;
	char buf[IEEE80211_MAX_QUEUES * 20];
	int q, res = 0;

	spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
	for (q = 0; q < local->hw.queues; q++)
		res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q,
				local->queue_stop_reasons[q],
				skb_queue_len(&local->pending[q]));
	spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);

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

DEBUGFS_READONLY_FILE_OPS(hwflags);
DEBUGFS_READONLY_FILE_OPS(queues);

/* statistics stuff */

static ssize_t format_devstat_counter(struct ieee80211_local *local,
	char __user *userbuf,
	size_t count, loff_t *ppos,
	int (*printvalue)(struct ieee80211_low_level_stats *stats, char *buf,
			  int buflen))
{
	struct ieee80211_low_level_stats stats;
	char buf[20];
	int res;

	rtnl_lock();
	res = drv_get_stats(local, &stats);
	rtnl_unlock();
	if (res)
		return res;
	res = printvalue(&stats, buf, sizeof(buf));
	return simple_read_from_buffer(userbuf, count, ppos, buf, res);
}

#define DEBUGFS_DEVSTATS_FILE(name)					\
static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\
				 char *buf, int buflen)			\
{									\
	return scnprintf(buf, buflen, "%u\n", stats->name);		\
}									\
static ssize_t stats_ ##name## _read(struct file *file,			\
				     char __user *userbuf,		\
				     size_t count, loff_t *ppos)	\
{									\
	return format_devstat_counter(file->private_data,		\
				      userbuf,				\
				      count,				\
				      ppos,				\
				      print_devstats_##name);		\
}									\
									\
static const struct file_operations stats_ ##name## _ops = {		\
	.read = stats_ ##name## _read,					\
	.open = simple_open,						\
	.llseek = generic_file_llseek,					\
};

#define DEBUGFS_STATS_ADD(name, field)					\
	debugfs_create_u32(#name, 0400, statsd, (u32 *) &field);
#define DEBUGFS_DEVSTATS_ADD(name)					\
	debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops);

DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);
DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);
DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);
DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount);

void debugfs_hw_add(struct ieee80211_local *local)
{
	struct dentry *phyd = local->hw.wiphy->debugfsdir;
	struct dentry *statsd;

	if (!phyd)
		return;

	local->debugfs.keys = debugfs_create_dir("keys", phyd);

	DEBUGFS_ADD(total_ps_buffered);
	DEBUGFS_ADD(wep_iv);
	DEBUGFS_ADD(queues);
#ifdef CONFIG_PM
	DEBUGFS_ADD_MODE(reset, 0200);
#endif
	DEBUGFS_ADD(hwflags);
	DEBUGFS_ADD(user_power);
	DEBUGFS_ADD(power);

	statsd = debugfs_create_dir("statistics", phyd);

	/* if the dir failed, don't put all the other things into the root! */
	if (!statsd)
		return;

	DEBUGFS_STATS_ADD(transmitted_fragment_count,
		local->dot11TransmittedFragmentCount);
	DEBUGFS_STATS_ADD(multicast_transmitted_frame_count,
		local->dot11MulticastTransmittedFrameCount);
	DEBUGFS_STATS_ADD(failed_count, local->dot11FailedCount);
	DEBUGFS_STATS_ADD(retry_count, local->dot11RetryCount);
	DEBUGFS_STATS_ADD(multiple_retry_count,
		local->dot11MultipleRetryCount);
	DEBUGFS_STATS_ADD(frame_duplicate_count,
		local->dot11FrameDuplicateCount);
	DEBUGFS_STATS_ADD(received_fragment_count,
		local->dot11ReceivedFragmentCount);
	DEBUGFS_STATS_ADD(multicast_received_frame_count,
		local->dot11MulticastReceivedFrameCount);
	DEBUGFS_STATS_ADD(transmitted_frame_count,
		local->dot11TransmittedFrameCount);
#ifdef CONFIG_MAC80211_DEBUG_COUNTERS
	DEBUGFS_STATS_ADD(tx_handlers_drop, local->tx_handlers_drop);
	DEBUGFS_STATS_ADD(tx_handlers_queued, local->tx_handlers_queued);
	DEBUGFS_STATS_ADD(tx_handlers_drop_unencrypted,
		local->tx_handlers_drop_unencrypted);
	DEBUGFS_STATS_ADD(tx_handlers_drop_fragment,
		local->tx_handlers_drop_fragment);
	DEBUGFS_STATS_ADD(tx_handlers_drop_wep,
		local->tx_handlers_drop_wep);
	DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc,
		local->tx_handlers_drop_not_assoc);
	DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port,
		local->tx_handlers_drop_unauth_port);
	DEBUGFS_STATS_ADD(rx_handlers_drop, local->rx_handlers_drop);
	DEBUGFS_STATS_ADD(rx_handlers_queued, local->rx_handlers_queued);
	DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc,
		local->rx_handlers_drop_nullfunc);
	DEBUGFS_STATS_ADD(rx_handlers_drop_defrag,
		local->rx_handlers_drop_defrag);
	DEBUGFS_STATS_ADD(rx_handlers_drop_short,
		local->rx_handlers_drop_short);
	DEBUGFS_STATS_ADD(tx_expand_skb_head,
		local->tx_expand_skb_head);
	DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned,
		local->tx_expand_skb_head_cloned);
	DEBUGFS_STATS_ADD(rx_expand_skb_head,
		local->rx_expand_skb_head);
	DEBUGFS_STATS_ADD(rx_expand_skb_head2,
		local->rx_expand_skb_head2);
	DEBUGFS_STATS_ADD(rx_handlers_fragments,
		local->rx_handlers_fragments);
	DEBUGFS_STATS_ADD(tx_status_drop,
		local->tx_status_drop);
#endif
	DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount);
	DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount);
	DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount);
	DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount);

	DEBUGFS_DEVSTATS_ADD(tx_latency);
}
Commit	Line	Data
7bcfaf2f	1
e9f207f0 JB	2	/*
	3	* mac80211 debugfs for wireless PHYs
	4	*
	5	* Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
d98ad83e	6	* Copyright 2013-2014 Intel Mobile Communications GmbH
e9f207f0 JB	7	*
	8	* GPLv2
	9	*
	10	*/
	11
	12	#include <linux/debugfs.h>
	13	#include <linux/rtnetlink.h>
	14	#include "ieee80211_i.h"
24487981	15	#include "driver-ops.h"
2c8dccc7	16	#include "rate.h"
e9f207f0 JB	17	#include "debugfs.h"
e9f207f0 JB	18
07caf9d6 EP	19	#define DEBUGFS_FORMAT_BUFFER_SIZE 100
07caf9d6 EP	20
ad38bfc9 MG	21	#define TX_LATENCY_BIN_DELIMTER_C ','
	22	#define TX_LATENCY_BIN_DELIMTER_S ","
	23	#define TX_LATENCY_BINS_DISABLED "enable(bins disabled)\n"
	24	#define TX_LATENCY_DISABLED "disable\n"
	25
	26
	27	/*
	28	* Display if Tx latency statistics & bins are enabled/disabled
	29	*/
	30	static ssize_t sta_tx_latency_stat_read(struct file *file,
	31	char __user *userbuf,
	32	size_t count, loff_t *ppos)
	33	{
	34	struct ieee80211_local *local = file->private_data;
	35	struct ieee80211_tx_latency_bin_ranges *tx_latency;
	36	char *buf;
	37	int bufsz, i, ret;
	38	int pos = 0;
	39
	40	rcu_read_lock();
	41
	42	tx_latency = rcu_dereference(local->tx_latency);
	43
	44	if (tx_latency && tx_latency->n_ranges) {
	45	bufsz = tx_latency->n_ranges * 15;
	46	buf = kzalloc(bufsz, GFP_ATOMIC);
	47	if (!buf)
	48	goto err;
	49
	50	for (i = 0; i < tx_latency->n_ranges; i++)
	51	pos += scnprintf(buf + pos, bufsz - pos, "%d,",
	52	tx_latency->ranges[i]);
	53	pos += scnprintf(buf + pos, bufsz - pos, "\n");
	54	} else if (tx_latency) {
	55	bufsz = sizeof(TX_LATENCY_BINS_DISABLED) + 1;
	56	buf = kzalloc(bufsz, GFP_ATOMIC);
	57	if (!buf)
	58	goto err;
	59
	60	pos += scnprintf(buf + pos, bufsz - pos, "%s\n",
	61	TX_LATENCY_BINS_DISABLED);
	62	} else {
	63	bufsz = sizeof(TX_LATENCY_DISABLED) + 1;
	64	buf = kzalloc(bufsz, GFP_ATOMIC);
	65	if (!buf)
	66	goto err;
	67
	68	pos += scnprintf(buf + pos, bufsz - pos, "%s\n",
	69	TX_LATENCY_DISABLED);
	70	}
	71
	72	rcu_read_unlock();
	73
	74	ret = simple_read_from_buffer(userbuf, count, ppos, buf, pos);
	75	kfree(buf);
	76
	77	return ret;
	78	err:
	79	rcu_read_unlock();
	80	return -ENOMEM;
	81	}
	82
	83	/*
	84	* Receive input from user regarding Tx latency statistics
85	* The input should indicate if Tx latency statistics and bins are
86	* enabled/disabled.
87	* If bins are enabled input should indicate the amount of different bins and
88	* their ranges. Each bin will count how many Tx frames transmitted within the
89	* appropriate latency.
90	* Legal input is:
91	* a) "enable(bins disabled)" - to enable only general statistics
92	* b) "a,b,c,d,...z" - to enable general statistics and bins, where all are
93	* numbers and a < b < c < d.. < z
94	* c) "disable" - disable all statistics
95	* NOTE: must configure Tx latency statistics bins before stations connected.
96	*/
97
98	static ssize_t sta_tx_latency_stat_write(struct file *file,
99	const char __user *userbuf,
100	size_t count, loff_t *ppos)
101	{
102	struct ieee80211_local *local = file->private_data;
103	char buf[128] = {};
104	char *bins = buf;
105	char *token;
106	int buf_size, i, alloc_size;
107	int prev_bin = 0;
108	int n_ranges = 0;
109	int ret = count;
110	struct ieee80211_tx_latency_bin_ranges *tx_latency;
111
112	if (sizeof(buf) <= count)
113	return -EINVAL;
114	buf_size = count;
115	if (copy_from_user(buf, userbuf, buf_size))
116	return -EFAULT;
117
118	mutex_lock(&local->sta_mtx);
119
120	/* cannot change config once we have stations */
121	if (local->num_sta)
122	goto unlock;
123
124	tx_latency =
125	rcu_dereference_protected(local->tx_latency,
126	lockdep_is_held(&local->sta_mtx));
127
128	/* disable Tx statistics */
129	if (!strcmp(buf, TX_LATENCY_DISABLED)) {
130	if (!tx_latency)
131	goto unlock;
0c2bef46	132	RCU_INIT_POINTER(local->tx_latency, NULL);
ad38bfc9 MG	133	synchronize_rcu();
	134	kfree(tx_latency);
	135	goto unlock;
	136	}
	137
	138	/* Tx latency already enabled */
	139	if (tx_latency)
	140	goto unlock;
	141
	142	if (strcmp(TX_LATENCY_BINS_DISABLED, buf)) {
	143	/* check how many bins and between what ranges user requested */
	144	token = buf;
	145	while (*token != '\0') {
	146	if (*token == TX_LATENCY_BIN_DELIMTER_C)
	147	n_ranges++;
	148	token++;
	149	}
	150	n_ranges++;
	151	}
	152
	153	alloc_size = sizeof(struct ieee80211_tx_latency_bin_ranges) +
	154	n_ranges * sizeof(u32);
	155	tx_latency = kzalloc(alloc_size, GFP_ATOMIC);
	156	if (!tx_latency) {
	157	ret = -ENOMEM;
	158	goto unlock;
	159	}
	160	tx_latency->n_ranges = n_ranges;
	161	for (i = 0; i < n_ranges; i++) { /* setting bin ranges */
	162	token = strsep(&bins, TX_LATENCY_BIN_DELIMTER_S);
	163	sscanf(token, "%d", &tx_latency->ranges[i]);
	164	/* bins values should be in ascending order */
	165	if (prev_bin >= tx_latency->ranges[i]) {
	166	ret = -EINVAL;
	167	kfree(tx_latency);
	168	goto unlock;
	169	}
	170	prev_bin = tx_latency->ranges[i];
	171	}
	172	rcu_assign_pointer(local->tx_latency, tx_latency);
	173
	174	unlock:
	175	mutex_unlock(&local->sta_mtx);
	176
	177	return ret;
	178	}
	179
	180	static const struct file_operations stats_tx_latency_ops = {
	181	.write = sta_tx_latency_stat_write,
	182	.read = sta_tx_latency_stat_read,
	183	.open = simple_open,
	184	.llseek = generic_file_llseek,
	185	};
	186
07caf9d6 EP	187	int mac80211_format_buffer(char __user *userbuf, size_t count,
	188	loff_t ppos, char fmt, ...)
	189	{
	190	va_list args;
	191	char buf[DEBUGFS_FORMAT_BUFFER_SIZE];
	192	int res;
	193
	194	va_start(args, fmt);
	195	res = vscnprintf(buf, sizeof(buf), fmt, args);
	196	va_end(args);
	197
	198	return simple_read_from_buffer(userbuf, count, ppos, buf, res);
	199	}
	200
279daf64	201	#define DEBUGFS_READONLY_FILE_FN(name, fmt, value...) \
e9f207f0 JB	202	static ssize_t name## _read(struct file file, char __user userbuf, \
	203	size_t count, loff_t *ppos) \
	204	{ \
	205	struct ieee80211_local *local = file->private_data; \
e9f207f0	206	\
07caf9d6 EP	207	return mac80211_format_buffer(userbuf, count, ppos, \
07caf9d6 EP	208	fmt "\n", ##value); \
279daf64 BG	209	}
	210
	211	#define DEBUGFS_READONLY_FILE_OPS(name) \
e9f207f0 JB	212	static const struct file_operations name## _ops = { \
e9f207f0 JB	213	.read = name## _read, \
234e3405	214	.open = simple_open, \
2b18ab36	215	.llseek = generic_file_llseek, \
e9f207f0 JB	216	};
e9f207f0 JB	217
279daf64 BG	218	#define DEBUGFS_READONLY_FILE(name, fmt, value...) \
	219	DEBUGFS_READONLY_FILE_FN(name, fmt, value) \
	220	DEBUGFS_READONLY_FILE_OPS(name)
	221
e9f207f0	222	#define DEBUGFS_ADD(name) \
7bcfaf2f	223	debugfs_create_file(#name, 0400, phyd, local, &name## _ops);
e9f207f0	224
827b1fb4	225	#define DEBUGFS_ADD_MODE(name, mode) \
7bcfaf2f	226	debugfs_create_file(#name, mode, phyd, local, &name## _ops);
e9f207f0 JB	227
e9f207f0 JB	228
83bdf2a1 BG	229	DEBUGFS_READONLY_FILE(user_power, "%d",
	230	local->user_power_level);
	231	DEBUGFS_READONLY_FILE(power, "%d",
	232	local->hw.conf.power_level);
07caf9d6	233	DEBUGFS_READONLY_FILE(total_ps_buffered, "%d",
e9f207f0	234	local->total_ps_buffered);
07caf9d6	235	DEBUGFS_READONLY_FILE(wep_iv, "%#08x",
e9f207f0	236	local->wep_iv & 0xffffff);
07caf9d6	237	DEBUGFS_READONLY_FILE(rate_ctrl_alg, "%s",
af65cd96	238	local->rate_ctrl ? local->rate_ctrl->ops->name : "hw/driver");
3b5d665b	239
2ad4814f	240	#ifdef CONFIG_PM
827b1fb4 JB	241	static ssize_t reset_write(struct file file, const char __user user_buf,
	242	size_t count, loff_t *ppos)
	243	{
	244	struct ieee80211_local *local = file->private_data;
	245
	246	rtnl_lock();
eecc4800	247	__ieee80211_suspend(&local->hw, NULL);
827b1fb4 JB	248	__ieee80211_resume(&local->hw);
	249	rtnl_unlock();
	250
	251	return count;
	252	}
	253
	254	static const struct file_operations reset_ops = {
	255	.write = reset_write,
234e3405	256	.open = simple_open,
6038f373	257	.llseek = noop_llseek,
827b1fb4	258	};
2ad4814f	259	#endif
827b1fb4	260
279daf64 BG	261	static ssize_t hwflags_read(struct file file, char __user user_buf,
	262	size_t count, loff_t *ppos)
	263	{
	264	struct ieee80211_local *local = file->private_data;
	265	int mxln = 500;
	266	ssize_t rv;
	267	char *buf = kzalloc(mxln, GFP_KERNEL);
	268	int sf = 0; /* how many written so far */
	269
d15b8459 JP	270	if (!buf)
	271	return 0;
	272
f364ef99	273	sf += scnprintf(buf, mxln - sf, "0x%x\n", local->hw.flags);
279daf64	274	if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)
f364ef99	275	sf += scnprintf(buf + sf, mxln - sf, "HAS_RATE_CONTROL\n");
279daf64	276	if (local->hw.flags & IEEE80211_HW_RX_INCLUDES_FCS)
f364ef99	277	sf += scnprintf(buf + sf, mxln - sf, "RX_INCLUDES_FCS\n");
279daf64	278	if (local->hw.flags & IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING)
f364ef99 EP	279	sf += scnprintf(buf + sf, mxln - sf,
f364ef99 EP	280	"HOST_BCAST_PS_BUFFERING\n");
279daf64	281	if (local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)
f364ef99 EP	282	sf += scnprintf(buf + sf, mxln - sf,
f364ef99 EP	283	"2GHZ_SHORT_SLOT_INCAPABLE\n");
279daf64	284	if (local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)
f364ef99 EP	285	sf += scnprintf(buf + sf, mxln - sf,
f364ef99 EP	286	"2GHZ_SHORT_PREAMBLE_INCAPABLE\n");
279daf64	287	if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
f364ef99	288	sf += scnprintf(buf + sf, mxln - sf, "SIGNAL_UNSPEC\n");
279daf64	289	if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
f364ef99	290	sf += scnprintf(buf + sf, mxln - sf, "SIGNAL_DBM\n");
c65dd147	291	if (local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC)
f364ef99 EP	292	sf += scnprintf(buf + sf, mxln - sf,
f364ef99 EP	293	"NEED_DTIM_BEFORE_ASSOC\n");
279daf64	294	if (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT)
f364ef99	295	sf += scnprintf(buf + sf, mxln - sf, "SPECTRUM_MGMT\n");
279daf64	296	if (local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION)
f364ef99	297	sf += scnprintf(buf + sf, mxln - sf, "AMPDU_AGGREGATION\n");
279daf64	298	if (local->hw.flags & IEEE80211_HW_SUPPORTS_PS)
f364ef99	299	sf += scnprintf(buf + sf, mxln - sf, "SUPPORTS_PS\n");
279daf64	300	if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
f364ef99	301	sf += scnprintf(buf + sf, mxln - sf, "PS_NULLFUNC_STACK\n");
279daf64	302	if (local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)
f364ef99	303	sf += scnprintf(buf + sf, mxln - sf, "SUPPORTS_DYNAMIC_PS\n");
279daf64	304	if (local->hw.flags & IEEE80211_HW_MFP_CAPABLE)
f364ef99	305	sf += scnprintf(buf + sf, mxln - sf, "MFP_CAPABLE\n");
279daf64	306	if (local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD)
f364ef99	307	sf += scnprintf(buf + sf, mxln - sf, "SUPPORTS_UAPSD\n");
279daf64	308	if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
f364ef99 EP	309	sf += scnprintf(buf + sf, mxln - sf,
f364ef99 EP	310	"REPORTS_TX_ACK_STATUS\n");
279daf64	311	if (local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
f364ef99	312	sf += scnprintf(buf + sf, mxln - sf, "CONNECTION_MONITOR\n");
279daf64	313	if (local->hw.flags & IEEE80211_HW_SUPPORTS_PER_STA_GTK)
f364ef99	314	sf += scnprintf(buf + sf, mxln - sf, "SUPPORTS_PER_STA_GTK\n");
279daf64	315	if (local->hw.flags & IEEE80211_HW_AP_LINK_PS)
f364ef99	316	sf += scnprintf(buf + sf, mxln - sf, "AP_LINK_PS\n");
edf6b784	317	if (local->hw.flags & IEEE80211_HW_TX_AMPDU_SETUP_IN_HW)
f364ef99	318	sf += scnprintf(buf + sf, mxln - sf, "TX_AMPDU_SETUP_IN_HW\n");
279daf64 BG	319
	320	rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
	321	kfree(buf);
	322	return rv;
	323	}
199d69f2	324
db2e6bd4 JB	325	static ssize_t queues_read(struct file file, char __user user_buf,
	326	size_t count, loff_t *ppos)
	327	{
	328	struct ieee80211_local *local = file->private_data;
	329	unsigned long flags;
	330	char buf[IEEE80211_MAX_QUEUES * 20];
	331	int q, res = 0;
	332
	333	spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
	334	for (q = 0; q < local->hw.queues; q++)
	335	res += sprintf(buf + res, "%02d: %#.8lx/%d\n", q,
	336	local->queue_stop_reasons[q],
3b8d81e0	337	skb_queue_len(&local->pending[q]));
db2e6bd4 JB	338	spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
	339
	340	return simple_read_from_buffer(user_buf, count, ppos, buf, res);
	341	}
	342
279daf64	343	DEBUGFS_READONLY_FILE_OPS(hwflags);
279daf64	344	DEBUGFS_READONLY_FILE_OPS(queues);
db2e6bd4	345
e9f207f0 JB	346	/* statistics stuff */
e9f207f0 JB	347
e9f207f0 JB	348	static ssize_t format_devstat_counter(struct ieee80211_local *local,
	349	char __user *userbuf,
	350	size_t count, loff_t *ppos,
	351	int (printvalue)(struct ieee80211_low_level_stats stats, char *buf,
	352	int buflen))
	353	{
	354	struct ieee80211_low_level_stats stats;
	355	char buf[20];
	356	int res;
	357
75636525	358	rtnl_lock();
24487981	359	res = drv_get_stats(local, &stats);
e9f207f0	360	rtnl_unlock();
24487981 JB	361	if (res)
	362	return res;
	363	res = printvalue(&stats, buf, sizeof(buf));
e9f207f0 JB	364	return simple_read_from_buffer(userbuf, count, ppos, buf, res);
	365	}
	366
	367	#define DEBUGFS_DEVSTATS_FILE(name) \
	368	static int print_devstats_##name(struct ieee80211_low_level_stats *stats,\
	369	char *buf, int buflen) \
	370	{ \
	371	return scnprintf(buf, buflen, "%u\n", stats->name); \
	372	} \
	373	static ssize_t stats_ ##name## _read(struct file *file, \
	374	char __user *userbuf, \
	375	size_t count, loff_t *ppos) \
	376	{ \
	377	return format_devstat_counter(file->private_data, \
	378	userbuf, \
	379	count, \
	380	ppos, \
	381	print_devstats_##name); \
	382	} \
	383	\
	384	static const struct file_operations stats_ ##name## _ops = { \
	385	.read = stats_ ##name## _read, \
234e3405	386	.open = simple_open, \
2b18ab36	387	.llseek = generic_file_llseek, \
e9f207f0 JB	388	};
e9f207f0 JB	389
2826bcd8 FF	390	#define DEBUGFS_STATS_ADD(name, field) \
	391	debugfs_create_u32(#name, 0400, statsd, (u32 *) &field);
	392	#define DEBUGFS_DEVSTATS_ADD(name) \
7bcfaf2f	393	debugfs_create_file(#name, 0400, statsd, local, &stats_ ##name## _ops);
e9f207f0	394
e9f207f0 JB	395	DEBUGFS_DEVSTATS_FILE(dot11ACKFailureCount);
	396	DEBUGFS_DEVSTATS_FILE(dot11RTSFailureCount);
	397	DEBUGFS_DEVSTATS_FILE(dot11FCSErrorCount);
	398	DEBUGFS_DEVSTATS_FILE(dot11RTSSuccessCount);
	399
e9f207f0 JB	400	void debugfs_hw_add(struct ieee80211_local *local)
	401	{
	402	struct dentry *phyd = local->hw.wiphy->debugfsdir;
	403	struct dentry *statsd;
	404
	405	if (!phyd)
	406	return;
	407
e9f207f0 JB	408	local->debugfs.keys = debugfs_create_dir("keys", phyd);
e9f207f0 JB	409
e9f207f0	410	DEBUGFS_ADD(total_ps_buffered);
e9f207f0	411	DEBUGFS_ADD(wep_iv);
db2e6bd4	412	DEBUGFS_ADD(queues);
2ad4814f	413	#ifdef CONFIG_PM
827b1fb4	414	DEBUGFS_ADD_MODE(reset, 0200);
2ad4814f	415	#endif
279daf64	416	DEBUGFS_ADD(hwflags);
83bdf2a1 BG	417	DEBUGFS_ADD(user_power);
83bdf2a1 BG	418	DEBUGFS_ADD(power);
e9f207f0 JB	419
e9f207f0 JB	420	statsd = debugfs_create_dir("statistics", phyd);
e9f207f0 JB	421
	422	/* if the dir failed, don't put all the other things into the root! */
	423	if (!statsd)
	424	return;
	425
2826bcd8 FF	426	DEBUGFS_STATS_ADD(transmitted_fragment_count,
	427	local->dot11TransmittedFragmentCount);
	428	DEBUGFS_STATS_ADD(multicast_transmitted_frame_count,
	429	local->dot11MulticastTransmittedFrameCount);
	430	DEBUGFS_STATS_ADD(failed_count, local->dot11FailedCount);
	431	DEBUGFS_STATS_ADD(retry_count, local->dot11RetryCount);
	432	DEBUGFS_STATS_ADD(multiple_retry_count,
	433	local->dot11MultipleRetryCount);
	434	DEBUGFS_STATS_ADD(frame_duplicate_count,
	435	local->dot11FrameDuplicateCount);
	436	DEBUGFS_STATS_ADD(received_fragment_count,
	437	local->dot11ReceivedFragmentCount);
	438	DEBUGFS_STATS_ADD(multicast_received_frame_count,
	439	local->dot11MulticastReceivedFrameCount);
	440	DEBUGFS_STATS_ADD(transmitted_frame_count,
	441	local->dot11TransmittedFrameCount);
e9f207f0	442	#ifdef CONFIG_MAC80211_DEBUG_COUNTERS
2826bcd8 FF	443	DEBUGFS_STATS_ADD(tx_handlers_drop, local->tx_handlers_drop);
	444	DEBUGFS_STATS_ADD(tx_handlers_queued, local->tx_handlers_queued);
	445	DEBUGFS_STATS_ADD(tx_handlers_drop_unencrypted,
	446	local->tx_handlers_drop_unencrypted);
	447	DEBUGFS_STATS_ADD(tx_handlers_drop_fragment,
	448	local->tx_handlers_drop_fragment);
	449	DEBUGFS_STATS_ADD(tx_handlers_drop_wep,
	450	local->tx_handlers_drop_wep);
	451	DEBUGFS_STATS_ADD(tx_handlers_drop_not_assoc,
	452	local->tx_handlers_drop_not_assoc);
	453	DEBUGFS_STATS_ADD(tx_handlers_drop_unauth_port,
	454	local->tx_handlers_drop_unauth_port);
	455	DEBUGFS_STATS_ADD(rx_handlers_drop, local->rx_handlers_drop);
	456	DEBUGFS_STATS_ADD(rx_handlers_queued, local->rx_handlers_queued);
	457	DEBUGFS_STATS_ADD(rx_handlers_drop_nullfunc,
	458	local->rx_handlers_drop_nullfunc);
	459	DEBUGFS_STATS_ADD(rx_handlers_drop_defrag,
	460	local->rx_handlers_drop_defrag);
	461	DEBUGFS_STATS_ADD(rx_handlers_drop_short,
	462	local->rx_handlers_drop_short);
2826bcd8 FF	463	DEBUGFS_STATS_ADD(tx_expand_skb_head,
	464	local->tx_expand_skb_head);
	465	DEBUGFS_STATS_ADD(tx_expand_skb_head_cloned,
	466	local->tx_expand_skb_head_cloned);
	467	DEBUGFS_STATS_ADD(rx_expand_skb_head,
	468	local->rx_expand_skb_head);
	469	DEBUGFS_STATS_ADD(rx_expand_skb_head2,
	470	local->rx_expand_skb_head2);
	471	DEBUGFS_STATS_ADD(rx_handlers_fragments,
	472	local->rx_handlers_fragments);
	473	DEBUGFS_STATS_ADD(tx_status_drop,
	474	local->tx_status_drop);
e9f207f0	475	#endif
2826bcd8 FF	476	DEBUGFS_DEVSTATS_ADD(dot11ACKFailureCount);
	477	DEBUGFS_DEVSTATS_ADD(dot11RTSFailureCount);
	478	DEBUGFS_DEVSTATS_ADD(dot11FCSErrorCount);
	479	DEBUGFS_DEVSTATS_ADD(dot11RTSSuccessCount);
ad38bfc9 MG	480
ad38bfc9 MG	481	DEBUGFS_DEVSTATS_ADD(tx_latency);
e9f207f0	482	}