[mirror_ubuntu-artful-kernel.git] / drivers / net / wireless / ath9k / debug.c

/*
 * Copyright (c) 2008 Atheros Communications Inc.
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include "ath9k.h"

static unsigned int ath9k_debug = DBG_DEFAULT;
module_param_named(debug, ath9k_debug, uint, 0);

static struct dentry *ath9k_debugfs_root;

void DPRINTF(struct ath_softc *sc, int dbg_mask, const char *fmt, ...)
{
	if (!sc)
		return;

	if (sc->debug.debug_mask & dbg_mask) {
		va_list args;

		va_start(args, fmt);
		printk(KERN_DEBUG "ath9k: ");
		vprintk(fmt, args);
		va_end(args);
	}
}

static int ath9k_debugfs_open(struct inode *inode, struct file *file)
{
	file->private_data = inode->i_private;
	return 0;
}

static ssize_t read_file_dma(struct file *file, char __user *user_buf,
			     size_t count, loff_t *ppos)
{
	struct ath_softc *sc = file->private_data;
	struct ath_hw *ah = sc->sc_ah;
	char buf[1024];
	unsigned int len = 0;
	u32 val[ATH9K_NUM_DMA_DEBUG_REGS];
	int i, qcuOffset = 0, dcuOffset = 0;
	u32 *qcuBase = &val[0], *dcuBase = &val[4];

	REG_WRITE(ah, AR_MACMISC,
		  ((AR_MACMISC_DMA_OBS_LINE_8 << AR_MACMISC_DMA_OBS_S) |
		   (AR_MACMISC_MISC_OBS_BUS_1 <<
		    AR_MACMISC_MISC_OBS_BUS_MSB_S)));

	len += snprintf(buf + len, sizeof(buf) - len,
			"Raw DMA Debug values:\n");

	for (i = 0; i < ATH9K_NUM_DMA_DEBUG_REGS; i++) {
		if (i % 4 == 0)
			len += snprintf(buf + len, sizeof(buf) - len, "\n");

		val[i] = REG_READ(ah, AR_DMADBG_0 + (i * sizeof(u32)));
		len += snprintf(buf + len, sizeof(buf) - len, "%d: %08x ",
				i, val[i]);
	}

	len += snprintf(buf + len, sizeof(buf) - len, "\n\n");
	len += snprintf(buf + len, sizeof(buf) - len,
			"Num QCU: chain_st fsp_ok fsp_st DCU: chain_st\n");

	for (i = 0; i < ATH9K_NUM_QUEUES; i++, qcuOffset += 4, dcuOffset += 5) {
		if (i == 8) {
			qcuOffset = 0;
			qcuBase++;
		}

		if (i == 6) {
			dcuOffset = 0;
			dcuBase++;
		}

		len += snprintf(buf + len, sizeof(buf) - len,
			"%2d          %2x      %1x     %2x           %2x\n",
			i, (*qcuBase & (0x7 << qcuOffset)) >> qcuOffset,
			(*qcuBase & (0x8 << qcuOffset)) >> (qcuOffset + 3),
			val[2] & (0x7 << (i * 3)) >> (i * 3),
			(*dcuBase & (0x1f << dcuOffset)) >> dcuOffset);
	}

	len += snprintf(buf + len, sizeof(buf) - len, "\n");

	len += snprintf(buf + len, sizeof(buf) - len,
		"qcu_stitch state:   %2x    qcu_fetch state:        %2x\n",
		(val[3] & 0x003c0000) >> 18, (val[3] & 0x03c00000) >> 22);
	len += snprintf(buf + len, sizeof(buf) - len,
		"qcu_complete state: %2x    dcu_complete state:     %2x\n",
		(val[3] & 0x1c000000) >> 26, (val[6] & 0x3));
	len += snprintf(buf + len, sizeof(buf) - len,
		"dcu_arb state:      %2x    dcu_fp state:           %2x\n",
		(val[5] & 0x06000000) >> 25, (val[5] & 0x38000000) >> 27);
	len += snprintf(buf + len, sizeof(buf) - len,
		"chan_idle_dur:     %3d    chan_idle_dur_valid:     %1d\n",
		(val[6] & 0x000003fc) >> 2, (val[6] & 0x00000400) >> 10);
	len += snprintf(buf + len, sizeof(buf) - len,
		"txfifo_valid_0:      %1d    txfifo_valid_1:          %1d\n",
		(val[6] & 0x00000800) >> 11, (val[6] & 0x00001000) >> 12);
	len += snprintf(buf + len, sizeof(buf) - len,
		"txfifo_dcu_num_0:   %2d    txfifo_dcu_num_1:       %2d\n",
		(val[6] & 0x0001e000) >> 13, (val[6] & 0x001e0000) >> 17);

	len += snprintf(buf + len, sizeof(buf) - len, "pcu observe: 0x%x \n",
			REG_READ(ah, AR_OBS_BUS_1));
	len += snprintf(buf + len, sizeof(buf) - len,
			"AR_CR: 0x%x \n", REG_READ(ah, AR_CR));

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

static const struct file_operations fops_dma = {
	.read = read_file_dma,
	.open = ath9k_debugfs_open,
	.owner = THIS_MODULE
};


void ath_debug_stat_interrupt(struct ath_softc *sc, enum ath9k_int status)
{
	if (status)
		sc->debug.stats.istats.total++;
	if (status & ATH9K_INT_RX)
		sc->debug.stats.istats.rxok++;
	if (status & ATH9K_INT_RXEOL)
		sc->debug.stats.istats.rxeol++;
	if (status & ATH9K_INT_RXORN)
		sc->debug.stats.istats.rxorn++;
	if (status & ATH9K_INT_TX)
		sc->debug.stats.istats.txok++;
	if (status & ATH9K_INT_TXURN)
		sc->debug.stats.istats.txurn++;
	if (status & ATH9K_INT_MIB)
		sc->debug.stats.istats.mib++;
	if (status & ATH9K_INT_RXPHY)
		sc->debug.stats.istats.rxphyerr++;
	if (status & ATH9K_INT_RXKCM)
		sc->debug.stats.istats.rx_keycache_miss++;
	if (status & ATH9K_INT_SWBA)
		sc->debug.stats.istats.swba++;
	if (status & ATH9K_INT_BMISS)
		sc->debug.stats.istats.bmiss++;
	if (status & ATH9K_INT_BNR)
		sc->debug.stats.istats.bnr++;
	if (status & ATH9K_INT_CST)
		sc->debug.stats.istats.cst++;
	if (status & ATH9K_INT_GTT)
		sc->debug.stats.istats.gtt++;
	if (status & ATH9K_INT_TIM)
		sc->debug.stats.istats.tim++;
	if (status & ATH9K_INT_CABEND)
		sc->debug.stats.istats.cabend++;
	if (status & ATH9K_INT_DTIMSYNC)
		sc->debug.stats.istats.dtimsync++;
	if (status & ATH9K_INT_DTIM)
		sc->debug.stats.istats.dtim++;
}

static ssize_t read_file_interrupt(struct file *file, char __user *user_buf,
				   size_t count, loff_t *ppos)
{
	struct ath_softc *sc = file->private_data;
	char buf[512];
	unsigned int len = 0;

	len += snprintf(buf + len, sizeof(buf) - len,
		"%8s: %10u\n", "RX", sc->debug.stats.istats.rxok);
	len += snprintf(buf + len, sizeof(buf) - len,
		"%8s: %10u\n", "RXEOL", sc->debug.stats.istats.rxeol);
	len += snprintf(buf + len, sizeof(buf) - len,
		"%8s: %10u\n", "RXORN", sc->debug.stats.istats.rxorn);
	len += snprintf(buf + len, sizeof(buf) - len,
		"%8s: %10u\n", "TX", sc->debug.stats.istats.txok);
	len += snprintf(buf + len, sizeof(buf) - len,
		"%8s: %10u\n", "TXURN", sc->debug.stats.istats.txurn);
	len += snprintf(buf + len, sizeof(buf) - len,
		"%8s: %10u\n", "MIB", sc->debug.stats.istats.mib);
	len += snprintf(buf + len, sizeof(buf) - len,
		"%8s: %10u\n", "RXPHY", sc->debug.stats.istats.rxphyerr);
	len += snprintf(buf + len, sizeof(buf) - len,
		"%8s: %10u\n", "RXKCM", sc->debug.stats.istats.rx_keycache_miss);
	len += snprintf(buf + len, sizeof(buf) - len,
		"%8s: %10u\n", "SWBA", sc->debug.stats.istats.swba);
	len += snprintf(buf + len, sizeof(buf) - len,
		"%8s: %10u\n", "BMISS", sc->debug.stats.istats.bmiss);
	len += snprintf(buf + len, sizeof(buf) - len,
		"%8s: %10u\n", "BNR", sc->debug.stats.istats.bnr);
	len += snprintf(buf + len, sizeof(buf) - len,
		"%8s: %10u\n", "CST", sc->debug.stats.istats.cst);
	len += snprintf(buf + len, sizeof(buf) - len,
		"%8s: %10u\n", "GTT", sc->debug.stats.istats.gtt);
	len += snprintf(buf + len, sizeof(buf) - len,
		"%8s: %10u\n", "TIM", sc->debug.stats.istats.tim);
	len += snprintf(buf + len, sizeof(buf) - len,
		"%8s: %10u\n", "CABEND", sc->debug.stats.istats.cabend);
	len += snprintf(buf + len, sizeof(buf) - len,
		"%8s: %10u\n", "DTIMSYNC", sc->debug.stats.istats.dtimsync);
	len += snprintf(buf + len, sizeof(buf) - len,
		"%8s: %10u\n", "DTIM", sc->debug.stats.istats.dtim);
	len += snprintf(buf + len, sizeof(buf) - len,
		"%8s: %10u\n", "TOTAL", sc->debug.stats.istats.total);

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

static const struct file_operations fops_interrupt = {
	.read = read_file_interrupt,
	.open = ath9k_debugfs_open,
	.owner = THIS_MODULE
};

static void ath_debug_stat_11n_rc(struct ath_softc *sc, struct sk_buff *skb)
{
	struct ath_tx_info_priv *tx_info_priv = NULL;
	struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
	struct ieee80211_tx_rate *rates = tx_info->status.rates;
	int final_ts_idx, idx;

	tx_info_priv = ATH_TX_INFO_PRIV(tx_info);
	final_ts_idx = tx_info_priv->tx.ts_rateindex;
	idx = sc->cur_rate_table->info[rates[final_ts_idx].idx].dot11rate;

	sc->debug.stats.n_rcstats[idx].success++;
}

static void ath_debug_stat_legacy_rc(struct ath_softc *sc, struct sk_buff *skb)
{
	struct ath_tx_info_priv *tx_info_priv = NULL;
	struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
	struct ieee80211_tx_rate *rates = tx_info->status.rates;
	int final_ts_idx, idx;

	tx_info_priv = ATH_TX_INFO_PRIV(tx_info);
	final_ts_idx = tx_info_priv->tx.ts_rateindex;
	idx = rates[final_ts_idx].idx;

	sc->debug.stats.legacy_rcstats[idx].success++;
}

void ath_debug_stat_rc(struct ath_softc *sc, struct sk_buff *skb)
{
	if (conf_is_ht(&sc->hw->conf))
		ath_debug_stat_11n_rc(sc, skb);
	else
		ath_debug_stat_legacy_rc(sc, skb);
}

/* FIXME: legacy rates, later on .. */
void ath_debug_stat_retries(struct ath_softc *sc, int rix,
			    int xretries, int retries, u8 per)
{
	if (conf_is_ht(&sc->hw->conf)) {
		int idx = sc->cur_rate_table->info[rix].dot11rate;

		sc->debug.stats.n_rcstats[idx].xretries += xretries;
		sc->debug.stats.n_rcstats[idx].retries += retries;
		sc->debug.stats.n_rcstats[idx].per = per;
	}
}

static ssize_t ath_read_file_stat_11n_rc(struct file *file,
					 char __user *user_buf,
					 size_t count, loff_t *ppos)
{
	struct ath_softc *sc = file->private_data;
	char buf[1024];
	unsigned int len = 0;
	int i = 0;

	len += sprintf(buf, "%7s %13s %8s %8s %6s\n\n", "Rate", "Success",
		       "Retries", "XRetries", "PER");

	for (i = 0; i <= 15; i++) {
		len += snprintf(buf + len, sizeof(buf) - len,
				"%5s%3d: %8u %8u %8u %8u\n", "MCS", i,
				sc->debug.stats.n_rcstats[i].success,
				sc->debug.stats.n_rcstats[i].retries,
				sc->debug.stats.n_rcstats[i].xretries,
				sc->debug.stats.n_rcstats[i].per);
	}

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

static ssize_t ath_read_file_stat_legacy_rc(struct file *file,
					    char __user *user_buf,
					    size_t count, loff_t *ppos)
{
	struct ath_softc *sc = file->private_data;
	char buf[512];
	unsigned int len = 0;
	int i = 0;

	len += sprintf(buf, "%7s %13s\n\n", "Rate", "Success");

	for (i = 0; i < sc->cur_rate_table->rate_cnt; i++) {
		len += snprintf(buf + len, sizeof(buf) - len, "%5u: %12u\n",
				sc->cur_rate_table->info[i].ratekbps / 1000,
				sc->debug.stats.legacy_rcstats[i].success);
	}

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

static ssize_t read_file_rcstat(struct file *file, char __user *user_buf,
				size_t count, loff_t *ppos)
{
	struct ath_softc *sc = file->private_data;

	if (conf_is_ht(&sc->hw->conf))
		return ath_read_file_stat_11n_rc(file, user_buf, count, ppos);
	else
		return ath_read_file_stat_legacy_rc(file, user_buf, count ,ppos);
}

static const struct file_operations fops_rcstat = {
	.read = read_file_rcstat,
	.open = ath9k_debugfs_open,
	.owner = THIS_MODULE
};

static const char * ath_wiphy_state_str(enum ath_wiphy_state state)
{
	switch (state) {
	case ATH_WIPHY_INACTIVE:
		return "INACTIVE";
	case ATH_WIPHY_ACTIVE:
		return "ACTIVE";
	case ATH_WIPHY_PAUSING:
		return "PAUSING";
	case ATH_WIPHY_PAUSED:
		return "PAUSED";
	case ATH_WIPHY_SCAN:
		return "SCAN";
	}
	return "?";
}

static ssize_t read_file_wiphy(struct file *file, char __user *user_buf,
			       size_t count, loff_t *ppos)
{
	struct ath_softc *sc = file->private_data;
	char buf[512];
	unsigned int len = 0;
	int i;
	u8 addr[ETH_ALEN];

	len += snprintf(buf + len, sizeof(buf) - len,
			"primary: %s (%s chan=%d ht=%d)\n",
			wiphy_name(sc->pri_wiphy->hw->wiphy),
			ath_wiphy_state_str(sc->pri_wiphy->state),
			sc->pri_wiphy->chan_idx, sc->pri_wiphy->chan_is_ht);
	for (i = 0; i < sc->num_sec_wiphy; i++) {
		struct ath_wiphy *aphy = sc->sec_wiphy[i];
		if (aphy == NULL)
			continue;
		len += snprintf(buf + len, sizeof(buf) - len,
				"secondary: %s (%s chan=%d ht=%d)\n",
				wiphy_name(aphy->hw->wiphy),
				ath_wiphy_state_str(aphy->state),
				aphy->chan_idx, aphy->chan_is_ht);
	}

	put_unaligned_le32(REG_READ(sc->sc_ah, AR_STA_ID0), addr);
	put_unaligned_le16(REG_READ(sc->sc_ah, AR_STA_ID1) & 0xffff, addr + 4);
	len += snprintf(buf + len, sizeof(buf) - len,
			"addr: %pM\n", addr);
	put_unaligned_le32(REG_READ(sc->sc_ah, AR_BSSMSKL), addr);
	put_unaligned_le16(REG_READ(sc->sc_ah, AR_BSSMSKU) & 0xffff, addr + 4);
	len += snprintf(buf + len, sizeof(buf) - len,
			"addrmask: %pM\n", addr);

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

static struct ath_wiphy * get_wiphy(struct ath_softc *sc, const char *name)
{
	int i;
	if (strcmp(name, wiphy_name(sc->pri_wiphy->hw->wiphy)) == 0)
		return sc->pri_wiphy;
	for (i = 0; i < sc->num_sec_wiphy; i++) {
		struct ath_wiphy *aphy = sc->sec_wiphy[i];
		if (aphy && strcmp(name, wiphy_name(aphy->hw->wiphy)) == 0)
			return aphy;
	}
	return NULL;
}

static int del_wiphy(struct ath_softc *sc, const char *name)
{
	struct ath_wiphy *aphy = get_wiphy(sc, name);
	if (!aphy)
		return -ENOENT;
	return ath9k_wiphy_del(aphy);
}

static int pause_wiphy(struct ath_softc *sc, const char *name)
{
	struct ath_wiphy *aphy = get_wiphy(sc, name);
	if (!aphy)
		return -ENOENT;
	return ath9k_wiphy_pause(aphy);
}

static int unpause_wiphy(struct ath_softc *sc, const char *name)
{
	struct ath_wiphy *aphy = get_wiphy(sc, name);
	if (!aphy)
		return -ENOENT;
	return ath9k_wiphy_unpause(aphy);
}

static int select_wiphy(struct ath_softc *sc, const char *name)
{
	struct ath_wiphy *aphy = get_wiphy(sc, name);
	if (!aphy)
		return -ENOENT;
	return ath9k_wiphy_select(aphy);
}

static int schedule_wiphy(struct ath_softc *sc, const char *msec)
{
	ath9k_wiphy_set_scheduler(sc, simple_strtoul(msec, NULL, 0));
	return 0;
}

static ssize_t write_file_wiphy(struct file *file, const char __user *user_buf,
				size_t count, loff_t *ppos)
{
	struct ath_softc *sc = file->private_data;
	char buf[50];
	size_t len;

	len = min(count, sizeof(buf) - 1);
	if (copy_from_user(buf, user_buf, len))
		return -EFAULT;
	buf[len] = '\0';
	if (len > 0 && buf[len - 1] == '\n')
		buf[len - 1] = '\0';

	if (strncmp(buf, "add", 3) == 0) {
		int res = ath9k_wiphy_add(sc);
		if (res < 0)
			return res;
	} else if (strncmp(buf, "del=", 4) == 0) {
		int res = del_wiphy(sc, buf + 4);
		if (res < 0)
			return res;
	} else if (strncmp(buf, "pause=", 6) == 0) {
		int res = pause_wiphy(sc, buf + 6);
		if (res < 0)
			return res;
	} else if (strncmp(buf, "unpause=", 8) == 0) {
		int res = unpause_wiphy(sc, buf + 8);
		if (res < 0)
			return res;
	} else if (strncmp(buf, "select=", 7) == 0) {
		int res = select_wiphy(sc, buf + 7);
		if (res < 0)
			return res;
	} else if (strncmp(buf, "schedule=", 9) == 0) {
		int res = schedule_wiphy(sc, buf + 9);
		if (res < 0)
			return res;
	} else
		return -EOPNOTSUPP;

	return count;
}

static const struct file_operations fops_wiphy = {
	.read = read_file_wiphy,
	.write = write_file_wiphy,
	.open = ath9k_debugfs_open,
	.owner = THIS_MODULE
};


int ath9k_init_debug(struct ath_softc *sc)
{
	sc->debug.debug_mask = ath9k_debug;

	sc->debug.debugfs_phy = debugfs_create_dir(wiphy_name(sc->hw->wiphy),
						      ath9k_debugfs_root);
	if (!sc->debug.debugfs_phy)
		goto err;

	sc->debug.debugfs_dma = debugfs_create_file("dma", S_IRUGO,
				       sc->debug.debugfs_phy, sc, &fops_dma);
	if (!sc->debug.debugfs_dma)
		goto err;

	sc->debug.debugfs_interrupt = debugfs_create_file("interrupt",
						     S_IRUGO,
						     sc->debug.debugfs_phy,
						     sc, &fops_interrupt);
	if (!sc->debug.debugfs_interrupt)
		goto err;

	sc->debug.debugfs_rcstat = debugfs_create_file("rcstat",
						  S_IRUGO,
						  sc->debug.debugfs_phy,
						  sc, &fops_rcstat);
	if (!sc->debug.debugfs_rcstat)
		goto err;

	sc->debug.debugfs_wiphy = debugfs_create_file(
		"wiphy", S_IRUGO | S_IWUSR, sc->debug.debugfs_phy, sc,
		&fops_wiphy);
	if (!sc->debug.debugfs_wiphy)
		goto err;

	return 0;
err:
	ath9k_exit_debug(sc);
	return -ENOMEM;
}

void ath9k_exit_debug(struct ath_softc *sc)
{
	debugfs_remove(sc->debug.debugfs_wiphy);
	debugfs_remove(sc->debug.debugfs_rcstat);
	debugfs_remove(sc->debug.debugfs_interrupt);
	debugfs_remove(sc->debug.debugfs_dma);
	debugfs_remove(sc->debug.debugfs_phy);
}

int ath9k_debug_create_root(void)
{
	ath9k_debugfs_root = debugfs_create_dir(KBUILD_MODNAME, NULL);
	if (!ath9k_debugfs_root)
		return -ENOENT;

	return 0;
}

void ath9k_debug_remove_root(void)
{
	debugfs_remove(ath9k_debugfs_root);
	ath9k_debugfs_root = NULL;
}
Commit	Line	Data
88b126af S	1	/*
	2	* Copyright (c) 2008 Atheros Communications Inc.
	3	*
	4	* Permission to use, copy, modify, and/or distribute this software for any
	5	* purpose with or without fee is hereby granted, provided that the above
	6	* copyright notice and this permission notice appear in all copies.
	7	*
	8	* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
	9	* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
	10	* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
	11	* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
	12	* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
	13	* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
	14	* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
	15	*/
	16
394cf0a1	17	#include "ath9k.h"
88b126af S	18
	19	static unsigned int ath9k_debug = DBG_DEFAULT;
	20	module_param_named(debug, ath9k_debug, uint, 0);
	21
19d8bc22 GJ	22	static struct dentry *ath9k_debugfs_root;
19d8bc22 GJ	23
88b126af S	24	void DPRINTF(struct ath_softc sc, int dbg_mask, const char fmt, ...)
	25	{
	26	if (!sc)
	27	return;
	28
17d7904d	29	if (sc->debug.debug_mask & dbg_mask) {
88b126af S	30	va_list args;
	31
	32	va_start(args, fmt);
	33	printk(KERN_DEBUG "ath9k: ");
	34	vprintk(fmt, args);
	35	va_end(args);
	36	}
	37	}
	38
2a163c6d S	39	static int ath9k_debugfs_open(struct inode inode, struct file file)
	40	{
	41	file->private_data = inode->i_private;
	42	return 0;
	43	}
	44
	45	static ssize_t read_file_dma(struct file file, char __user user_buf,
	46	size_t count, loff_t *ppos)
	47	{
	48	struct ath_softc *sc = file->private_data;
cbe61d8a	49	struct ath_hw *ah = sc->sc_ah;
2a163c6d S	50	char buf[1024];
	51	unsigned int len = 0;
	52	u32 val[ATH9K_NUM_DMA_DEBUG_REGS];
	53	int i, qcuOffset = 0, dcuOffset = 0;
	54	u32 qcuBase = &val[0], dcuBase = &val[4];
	55
	56	REG_WRITE(ah, AR_MACMISC,
	57	((AR_MACMISC_DMA_OBS_LINE_8 << AR_MACMISC_DMA_OBS_S) \|
	58	(AR_MACMISC_MISC_OBS_BUS_1 <<
	59	AR_MACMISC_MISC_OBS_BUS_MSB_S)));
	60
	61	len += snprintf(buf + len, sizeof(buf) - len,
	62	"Raw DMA Debug values:\n");
	63
	64	for (i = 0; i < ATH9K_NUM_DMA_DEBUG_REGS; i++) {
	65	if (i % 4 == 0)
	66	len += snprintf(buf + len, sizeof(buf) - len, "\n");
	67
	68	val[i] = REG_READ(ah, AR_DMADBG_0 + (i * sizeof(u32)));
	69	len += snprintf(buf + len, sizeof(buf) - len, "%d: %08x ",
	70	i, val[i]);
	71	}
	72
	73	len += snprintf(buf + len, sizeof(buf) - len, "\n\n");
	74	len += snprintf(buf + len, sizeof(buf) - len,
	75	"Num QCU: chain_st fsp_ok fsp_st DCU: chain_st\n");
	76
	77	for (i = 0; i < ATH9K_NUM_QUEUES; i++, qcuOffset += 4, dcuOffset += 5) {
	78	if (i == 8) {
	79	qcuOffset = 0;
	80	qcuBase++;
	81	}
	82
	83	if (i == 6) {
	84	dcuOffset = 0;
	85	dcuBase++;
	86	}
	87
	88	len += snprintf(buf + len, sizeof(buf) - len,
	89	"%2d %2x %1x %2x %2x\n",
	90	i, (*qcuBase & (0x7 << qcuOffset)) >> qcuOffset,
	91	(*qcuBase & (0x8 << qcuOffset)) >> (qcuOffset + 3),
	92	val[2] & (0x7 << (i * 3)) >> (i * 3),
	93	(*dcuBase & (0x1f << dcuOffset)) >> dcuOffset);
	94	}
	95
	96	len += snprintf(buf + len, sizeof(buf) - len, "\n");
	97
	98	len += snprintf(buf + len, sizeof(buf) - len,
	99	"qcu_stitch state: %2x qcu_fetch state: %2x\n",
	100	(val[3] & 0x003c0000) >> 18, (val[3] & 0x03c00000) >> 22);
	101	len += snprintf(buf + len, sizeof(buf) - len,
	102	"qcu_complete state: %2x dcu_complete state: %2x\n",
	103	(val[3] & 0x1c000000) >> 26, (val[6] & 0x3));
	104	len += snprintf(buf + len, sizeof(buf) - len,
	105	"dcu_arb state: %2x dcu_fp state: %2x\n",
	106	(val[5] & 0x06000000) >> 25, (val[5] & 0x38000000) >> 27);
	107	len += snprintf(buf + len, sizeof(buf) - len,
	108	"chan_idle_dur: %3d chan_idle_dur_valid: %1d\n",
	109	(val[6] & 0x000003fc) >> 2, (val[6] & 0x00000400) >> 10);
	110	len += snprintf(buf + len, sizeof(buf) - len,
	111	"txfifo_valid_0: %1d txfifo_valid_1: %1d\n",
	112	(val[6] & 0x00000800) >> 11, (val[6] & 0x00001000) >> 12);
	113	len += snprintf(buf + len, sizeof(buf) - len,
114	"txfifo_dcu_num_0: %2d txfifo_dcu_num_1: %2d\n",
115	(val[6] & 0x0001e000) >> 13, (val[6] & 0x001e0000) >> 17);
116
117	len += snprintf(buf + len, sizeof(buf) - len, "pcu observe: 0x%x \n",
118	REG_READ(ah, AR_OBS_BUS_1));
119	len += snprintf(buf + len, sizeof(buf) - len,
120	"AR_CR: 0x%x \n", REG_READ(ah, AR_CR));
121
122	return simple_read_from_buffer(user_buf, count, ppos, buf, len);
123	}
124
125	static const struct file_operations fops_dma = {
126	.read = read_file_dma,
127	.open = ath9k_debugfs_open,
128	.owner = THIS_MODULE
129	};
130
817e11de S	131
	132	void ath_debug_stat_interrupt(struct ath_softc *sc, enum ath9k_int status)
	133	{
	134	if (status)
17d7904d	135	sc->debug.stats.istats.total++;
817e11de	136	if (status & ATH9K_INT_RX)
17d7904d	137	sc->debug.stats.istats.rxok++;
817e11de	138	if (status & ATH9K_INT_RXEOL)
17d7904d	139	sc->debug.stats.istats.rxeol++;
817e11de	140	if (status & ATH9K_INT_RXORN)
17d7904d	141	sc->debug.stats.istats.rxorn++;
817e11de	142	if (status & ATH9K_INT_TX)
17d7904d	143	sc->debug.stats.istats.txok++;
817e11de	144	if (status & ATH9K_INT_TXURN)
17d7904d	145	sc->debug.stats.istats.txurn++;
817e11de	146	if (status & ATH9K_INT_MIB)
17d7904d	147	sc->debug.stats.istats.mib++;
817e11de	148	if (status & ATH9K_INT_RXPHY)
17d7904d	149	sc->debug.stats.istats.rxphyerr++;
817e11de	150	if (status & ATH9K_INT_RXKCM)
17d7904d	151	sc->debug.stats.istats.rx_keycache_miss++;
817e11de	152	if (status & ATH9K_INT_SWBA)
17d7904d	153	sc->debug.stats.istats.swba++;
817e11de	154	if (status & ATH9K_INT_BMISS)
17d7904d	155	sc->debug.stats.istats.bmiss++;
817e11de	156	if (status & ATH9K_INT_BNR)
17d7904d	157	sc->debug.stats.istats.bnr++;
817e11de	158	if (status & ATH9K_INT_CST)
17d7904d	159	sc->debug.stats.istats.cst++;
817e11de	160	if (status & ATH9K_INT_GTT)
17d7904d	161	sc->debug.stats.istats.gtt++;
817e11de	162	if (status & ATH9K_INT_TIM)
17d7904d	163	sc->debug.stats.istats.tim++;
817e11de	164	if (status & ATH9K_INT_CABEND)
17d7904d	165	sc->debug.stats.istats.cabend++;
817e11de	166	if (status & ATH9K_INT_DTIMSYNC)
17d7904d	167	sc->debug.stats.istats.dtimsync++;
817e11de	168	if (status & ATH9K_INT_DTIM)
17d7904d	169	sc->debug.stats.istats.dtim++;
817e11de S	170	}
	171
	172	static ssize_t read_file_interrupt(struct file file, char __user user_buf,
	173	size_t count, loff_t *ppos)
	174	{
	175	struct ath_softc *sc = file->private_data;
	176	char buf[512];
	177	unsigned int len = 0;
	178
	179	len += snprintf(buf + len, sizeof(buf) - len,
17d7904d	180	"%8s: %10u\n", "RX", sc->debug.stats.istats.rxok);
817e11de	181	len += snprintf(buf + len, sizeof(buf) - len,
17d7904d	182	"%8s: %10u\n", "RXEOL", sc->debug.stats.istats.rxeol);
817e11de	183	len += snprintf(buf + len, sizeof(buf) - len,
17d7904d	184	"%8s: %10u\n", "RXORN", sc->debug.stats.istats.rxorn);
817e11de	185	len += snprintf(buf + len, sizeof(buf) - len,
17d7904d	186	"%8s: %10u\n", "TX", sc->debug.stats.istats.txok);
817e11de	187	len += snprintf(buf + len, sizeof(buf) - len,
17d7904d	188	"%8s: %10u\n", "TXURN", sc->debug.stats.istats.txurn);
817e11de	189	len += snprintf(buf + len, sizeof(buf) - len,
17d7904d	190	"%8s: %10u\n", "MIB", sc->debug.stats.istats.mib);
817e11de	191	len += snprintf(buf + len, sizeof(buf) - len,
17d7904d	192	"%8s: %10u\n", "RXPHY", sc->debug.stats.istats.rxphyerr);
817e11de	193	len += snprintf(buf + len, sizeof(buf) - len,
17d7904d	194	"%8s: %10u\n", "RXKCM", sc->debug.stats.istats.rx_keycache_miss);
817e11de	195	len += snprintf(buf + len, sizeof(buf) - len,
17d7904d	196	"%8s: %10u\n", "SWBA", sc->debug.stats.istats.swba);
817e11de	197	len += snprintf(buf + len, sizeof(buf) - len,
17d7904d	198	"%8s: %10u\n", "BMISS", sc->debug.stats.istats.bmiss);
817e11de	199	len += snprintf(buf + len, sizeof(buf) - len,
17d7904d	200	"%8s: %10u\n", "BNR", sc->debug.stats.istats.bnr);
817e11de	201	len += snprintf(buf + len, sizeof(buf) - len,
17d7904d	202	"%8s: %10u\n", "CST", sc->debug.stats.istats.cst);
817e11de	203	len += snprintf(buf + len, sizeof(buf) - len,
17d7904d	204	"%8s: %10u\n", "GTT", sc->debug.stats.istats.gtt);
817e11de	205	len += snprintf(buf + len, sizeof(buf) - len,
17d7904d	206	"%8s: %10u\n", "TIM", sc->debug.stats.istats.tim);
817e11de	207	len += snprintf(buf + len, sizeof(buf) - len,
17d7904d	208	"%8s: %10u\n", "CABEND", sc->debug.stats.istats.cabend);
817e11de	209	len += snprintf(buf + len, sizeof(buf) - len,
17d7904d	210	"%8s: %10u\n", "DTIMSYNC", sc->debug.stats.istats.dtimsync);
817e11de	211	len += snprintf(buf + len, sizeof(buf) - len,
17d7904d	212	"%8s: %10u\n", "DTIM", sc->debug.stats.istats.dtim);
817e11de	213	len += snprintf(buf + len, sizeof(buf) - len,
17d7904d	214	"%8s: %10u\n", "TOTAL", sc->debug.stats.istats.total);
817e11de S	215
	216	return simple_read_from_buffer(user_buf, count, ppos, buf, len);
	217	}
	218
	219	static const struct file_operations fops_interrupt = {
	220	.read = read_file_interrupt,
	221	.open = ath9k_debugfs_open,
	222	.owner = THIS_MODULE
	223	};
	224
7a7dec65 S	225	static void ath_debug_stat_11n_rc(struct ath_softc sc, struct sk_buff skb)
	226	{
	227	struct ath_tx_info_priv *tx_info_priv = NULL;
	228	struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
	229	struct ieee80211_tx_rate *rates = tx_info->status.rates;
	230	int final_ts_idx, idx;
	231
	232	tx_info_priv = ATH_TX_INFO_PRIV(tx_info);
	233	final_ts_idx = tx_info_priv->tx.ts_rateindex;
	234	idx = sc->cur_rate_table->info[rates[final_ts_idx].idx].dot11rate;
	235
17d7904d	236	sc->debug.stats.n_rcstats[idx].success++;
7a7dec65 S	237	}
	238
	239	static void ath_debug_stat_legacy_rc(struct ath_softc sc, struct sk_buff skb)
	240	{
	241	struct ath_tx_info_priv *tx_info_priv = NULL;
	242	struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
	243	struct ieee80211_tx_rate *rates = tx_info->status.rates;
	244	int final_ts_idx, idx;
	245
	246	tx_info_priv = ATH_TX_INFO_PRIV(tx_info);
	247	final_ts_idx = tx_info_priv->tx.ts_rateindex;
	248	idx = rates[final_ts_idx].idx;
	249
17d7904d	250	sc->debug.stats.legacy_rcstats[idx].success++;
7a7dec65 S	251	}
	252
	253	void ath_debug_stat_rc(struct ath_softc sc, struct sk_buff skb)
	254	{
	255	if (conf_is_ht(&sc->hw->conf))
	256	ath_debug_stat_11n_rc(sc, skb);
	257	else
	258	ath_debug_stat_legacy_rc(sc, skb);
	259	}
	260
029bc432 S	261	/* FIXME: legacy rates, later on .. */
029bc432 S	262	void ath_debug_stat_retries(struct ath_softc *sc, int rix,
9e712790	263	int xretries, int retries, u8 per)
029bc432 S	264	{
	265	if (conf_is_ht(&sc->hw->conf)) {
	266	int idx = sc->cur_rate_table->info[rix].dot11rate;
	267
17d7904d S	268	sc->debug.stats.n_rcstats[idx].xretries += xretries;
17d7904d S	269	sc->debug.stats.n_rcstats[idx].retries += retries;
9e712790	270	sc->debug.stats.n_rcstats[idx].per = per;
029bc432 S	271	}
	272	}
	273
7a7dec65 S	274	static ssize_t ath_read_file_stat_11n_rc(struct file *file,
	275	char __user *user_buf,
	276	size_t count, loff_t *ppos)
	277	{
	278	struct ath_softc *sc = file->private_data;
029bc432	279	char buf[1024];
7a7dec65 S	280	unsigned int len = 0;
	281	int i = 0;
	282
9e712790 S	283	len += sprintf(buf, "%7s %13s %8s %8s %6s\n\n", "Rate", "Success",
9e712790 S	284	"Retries", "XRetries", "PER");
7a7dec65 S	285
	286	for (i = 0; i <= 15; i++) {
	287	len += snprintf(buf + len, sizeof(buf) - len,
9e712790	288	"%5s%3d: %8u %8u %8u %8u\n", "MCS", i,
17d7904d S	289	sc->debug.stats.n_rcstats[i].success,
17d7904d S	290	sc->debug.stats.n_rcstats[i].retries,
9e712790 S	291	sc->debug.stats.n_rcstats[i].xretries,
9e712790 S	292	sc->debug.stats.n_rcstats[i].per);
7a7dec65 S	293	}
	294
	295	return simple_read_from_buffer(user_buf, count, ppos, buf, len);
	296	}
	297
	298	static ssize_t ath_read_file_stat_legacy_rc(struct file *file,
	299	char __user *user_buf,
	300	size_t count, loff_t *ppos)
	301	{
	302	struct ath_softc *sc = file->private_data;
	303	char buf[512];
	304	unsigned int len = 0;
	305	int i = 0;
	306
	307	len += sprintf(buf, "%7s %13s\n\n", "Rate", "Success");
	308
	309	for (i = 0; i < sc->cur_rate_table->rate_cnt; i++) {
	310	len += snprintf(buf + len, sizeof(buf) - len, "%5u: %12u\n",
	311	sc->cur_rate_table->info[i].ratekbps / 1000,
17d7904d	312	sc->debug.stats.legacy_rcstats[i].success);
7a7dec65 S	313	}
	314
	315	return simple_read_from_buffer(user_buf, count, ppos, buf, len);
	316	}
	317
	318	static ssize_t read_file_rcstat(struct file file, char __user user_buf,
	319	size_t count, loff_t *ppos)
	320	{
	321	struct ath_softc *sc = file->private_data;
	322
	323	if (conf_is_ht(&sc->hw->conf))
	324	return ath_read_file_stat_11n_rc(file, user_buf, count, ppos);
	325	else
	326	return ath_read_file_stat_legacy_rc(file, user_buf, count ,ppos);
	327	}
	328
	329	static const struct file_operations fops_rcstat = {
	330	.read = read_file_rcstat,
	331	.open = ath9k_debugfs_open,
	332	.owner = THIS_MODULE
	333	};
27abe060	334
39d89cd3 JM	335	static const char * ath_wiphy_state_str(enum ath_wiphy_state state)
	336	{
	337	switch (state) {
	338	case ATH_WIPHY_INACTIVE:
	339	return "INACTIVE";
	340	case ATH_WIPHY_ACTIVE:
	341	return "ACTIVE";
	342	case ATH_WIPHY_PAUSING:
	343	return "PAUSING";
	344	case ATH_WIPHY_PAUSED:
	345	return "PAUSED";
	346	case ATH_WIPHY_SCAN:
	347	return "SCAN";
	348	}
	349	return "?";
	350	}
	351
	352	static ssize_t read_file_wiphy(struct file file, char __user user_buf,
	353	size_t count, loff_t *ppos)
	354	{
	355	struct ath_softc *sc = file->private_data;
	356	char buf[512];
	357	unsigned int len = 0;
	358	int i;
	359	u8 addr[ETH_ALEN];
	360
	361	len += snprintf(buf + len, sizeof(buf) - len,
	362	"primary: %s (%s chan=%d ht=%d)\n",
	363	wiphy_name(sc->pri_wiphy->hw->wiphy),
	364	ath_wiphy_state_str(sc->pri_wiphy->state),
	365	sc->pri_wiphy->chan_idx, sc->pri_wiphy->chan_is_ht);
	366	for (i = 0; i < sc->num_sec_wiphy; i++) {
	367	struct ath_wiphy *aphy = sc->sec_wiphy[i];
	368	if (aphy == NULL)
	369	continue;
	370	len += snprintf(buf + len, sizeof(buf) - len,
	371	"secondary: %s (%s chan=%d ht=%d)\n",
	372	wiphy_name(aphy->hw->wiphy),
	373	ath_wiphy_state_str(aphy->state),
	374	aphy->chan_idx, aphy->chan_is_ht);
	375	}
	376
	377	put_unaligned_le32(REG_READ(sc->sc_ah, AR_STA_ID0), addr);
	378	put_unaligned_le16(REG_READ(sc->sc_ah, AR_STA_ID1) & 0xffff, addr + 4);
	379	len += snprintf(buf + len, sizeof(buf) - len,
	380	"addr: %pM\n", addr);
	381	put_unaligned_le32(REG_READ(sc->sc_ah, AR_BSSMSKL), addr);
	382	put_unaligned_le16(REG_READ(sc->sc_ah, AR_BSSMSKU) & 0xffff, addr + 4);
	383	len += snprintf(buf + len, sizeof(buf) - len,
	384	"addrmask: %pM\n", addr);
	385
	386	return simple_read_from_buffer(user_buf, count, ppos, buf, len);
	387	}
	388
	389	static struct ath_wiphy * get_wiphy(struct ath_softc sc, const char name)
	390	{
	391	int i;
	392	if (strcmp(name, wiphy_name(sc->pri_wiphy->hw->wiphy)) == 0)
	393	return sc->pri_wiphy;
	394	for (i = 0; i < sc->num_sec_wiphy; i++) {
	395	struct ath_wiphy *aphy = sc->sec_wiphy[i];
	396	if (aphy && strcmp(name, wiphy_name(aphy->hw->wiphy)) == 0)
	397	return aphy;
	398	}
399	return NULL;
400	}
401
402	static int del_wiphy(struct ath_softc sc, const char name)
403	{
404	struct ath_wiphy *aphy = get_wiphy(sc, name);
405	if (!aphy)
406	return -ENOENT;
407	return ath9k_wiphy_del(aphy);
408	}
409
410	static int pause_wiphy(struct ath_softc sc, const char name)
411	{
412	struct ath_wiphy *aphy = get_wiphy(sc, name);
413	if (!aphy)
414	return -ENOENT;
415	return ath9k_wiphy_pause(aphy);
416	}
417
418	static int unpause_wiphy(struct ath_softc sc, const char name)
419	{
420	struct ath_wiphy *aphy = get_wiphy(sc, name);
421	if (!aphy)
422	return -ENOENT;
423	return ath9k_wiphy_unpause(aphy);
424	}
425
426	static int select_wiphy(struct ath_softc sc, const char name)
427	{
428	struct ath_wiphy *aphy = get_wiphy(sc, name);
429	if (!aphy)
430	return -ENOENT;
431	return ath9k_wiphy_select(aphy);
432	}
433
434	static int schedule_wiphy(struct ath_softc sc, const char msec)
435	{
436	ath9k_wiphy_set_scheduler(sc, simple_strtoul(msec, NULL, 0));
437	return 0;
438	}
439
440	static ssize_t write_file_wiphy(struct file file, const char __user user_buf,
441	size_t count, loff_t *ppos)
442	{
443	struct ath_softc *sc = file->private_data;
444	char buf[50];
445	size_t len;
446
447	len = min(count, sizeof(buf) - 1);
448	if (copy_from_user(buf, user_buf, len))
449	return -EFAULT;
450	buf[len] = '\0';
451	if (len > 0 && buf[len - 1] == '\n')
452	buf[len - 1] = '\0';
453
454	if (strncmp(buf, "add", 3) == 0) {
455	int res = ath9k_wiphy_add(sc);
456	if (res < 0)
457	return res;
458	} else if (strncmp(buf, "del=", 4) == 0) {
459	int res = del_wiphy(sc, buf + 4);
460	if (res < 0)
461	return res;
462	} else if (strncmp(buf, "pause=", 6) == 0) {
463	int res = pause_wiphy(sc, buf + 6);
464	if (res < 0)
465	return res;
466	} else if (strncmp(buf, "unpause=", 8) == 0) {
467	int res = unpause_wiphy(sc, buf + 8);
468	if (res < 0)
469	return res;
470	} else if (strncmp(buf, "select=", 7) == 0) {
471	int res = select_wiphy(sc, buf + 7);
472	if (res < 0)
473	return res;
474	} else if (strncmp(buf, "schedule=", 9) == 0) {
475	int res = schedule_wiphy(sc, buf + 9);
476	if (res < 0)
477	return res;
478	} else
479	return -EOPNOTSUPP;
480
481	return count;
482	}
483
484	static const struct file_operations fops_wiphy = {
485	.read = read_file_wiphy,
486	.write = write_file_wiphy,
487	.open = ath9k_debugfs_open,
488	.owner = THIS_MODULE
489	};
490
491
826d2680	492	int ath9k_init_debug(struct ath_softc *sc)
88b126af	493	{
17d7904d	494	sc->debug.debug_mask = ath9k_debug;
826d2680	495
17d7904d	496	sc->debug.debugfs_phy = debugfs_create_dir(wiphy_name(sc->hw->wiphy),
19d8bc22	497	ath9k_debugfs_root);
17d7904d	498	if (!sc->debug.debugfs_phy)
826d2680 S	499	goto err;
826d2680 S	500
17d7904d S	501	sc->debug.debugfs_dma = debugfs_create_file("dma", S_IRUGO,
	502	sc->debug.debugfs_phy, sc, &fops_dma);
	503	if (!sc->debug.debugfs_dma)
2a163c6d S	504	goto err;
2a163c6d S	505
17d7904d	506	sc->debug.debugfs_interrupt = debugfs_create_file("interrupt",
817e11de	507	S_IRUGO,
17d7904d	508	sc->debug.debugfs_phy,
817e11de	509	sc, &fops_interrupt);
17d7904d	510	if (!sc->debug.debugfs_interrupt)
817e11de S	511	goto err;
817e11de S	512
17d7904d	513	sc->debug.debugfs_rcstat = debugfs_create_file("rcstat",
7a7dec65	514	S_IRUGO,
17d7904d	515	sc->debug.debugfs_phy,
7a7dec65	516	sc, &fops_rcstat);
17d7904d	517	if (!sc->debug.debugfs_rcstat)
7a7dec65 S	518	goto err;
7a7dec65 S	519
39d89cd3 JM	520	sc->debug.debugfs_wiphy = debugfs_create_file(
	521	"wiphy", S_IRUGO \| S_IWUSR, sc->debug.debugfs_phy, sc,
	522	&fops_wiphy);
	523	if (!sc->debug.debugfs_wiphy)
	524	goto err;
	525
826d2680 S	526	return 0;
	527	err:
	528	ath9k_exit_debug(sc);
	529	return -ENOMEM;
	530	}
	531
	532	void ath9k_exit_debug(struct ath_softc *sc)
	533	{
39d89cd3	534	debugfs_remove(sc->debug.debugfs_wiphy);
17d7904d S	535	debugfs_remove(sc->debug.debugfs_rcstat);
	536	debugfs_remove(sc->debug.debugfs_interrupt);
	537	debugfs_remove(sc->debug.debugfs_dma);
	538	debugfs_remove(sc->debug.debugfs_phy);
19d8bc22 GJ	539	}
	540
	541	int ath9k_debug_create_root(void)
	542	{
	543	ath9k_debugfs_root = debugfs_create_dir(KBUILD_MODNAME, NULL);
	544	if (!ath9k_debugfs_root)
	545	return -ENOENT;
	546
	547	return 0;
	548	}
	549
	550	void ath9k_debug_remove_root(void)
	551	{
	552	debugfs_remove(ath9k_debugfs_root);
	553	ath9k_debugfs_root = NULL;
88b126af	554	}