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Commit 39d89cd3 authored by Jouni Malinen's avatar Jouni Malinen Committed by John W. Linville
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ath9k: Add a debugfs interface for controlling virtual wiphys 



debugfs ath9k/phy#/wiphy can be used to show the current list of
virtual wiphys and to add/remove virtual wiphys. Eventually, this
interface could be replaced with a cfg80211/nl80211 command that is
passed through mac80211.

For example:
# cat /debug/ath9k/phy0/wiphy
primary: phy0
# echo add > /debug/ath9k/phy0/wiphy
# cat /debug/ath9k/phy0/wiphy
primary: phy0
secondary: phy1
# echo del=phy1 > /debug/ath9k/phy0/wiphy
# cat /debug/ath9k/phy0/wiphy
primary: phy0

In addition, following commands can be used to test pausing and
unpausing of the virtual wiphys:
pause=phy1
unpause=phy1
select=phy1
(select pauses and unpauses wiphys automatically based on channel)
schedule=500
(set wiphy scheduling interval in msec; 0 = disable; default value: 500)

Signed-off-by: default avatarJouni Malinen <jouni.malinen@atheros.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent f98c3bd2

drivers/net/wireless/ath9k/debug.c

+164 −0
Original line number Diff line number Diff line
@@ -330,6 +330,163 @@ static const struct file_operations fops_rcstat = { 
	.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;
@@ -362,6 +519,12 @@ int ath9k_init_debug(struct ath_softc *sc) 
	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);
@@ -370,6 +533,7 @@ int ath9k_init_debug(struct ath_softc *sc) 


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);

drivers/net/wireless/ath9k/debug.h

+1 −0
Original line number Diff line number Diff line
@@ -107,6 +107,7 @@ struct ath9k_debug { 
	struct dentry *debugfs_dma;

	struct dentry *debugfs_interrupt;

	struct dentry *debugfs_rcstat;

	struct dentry *debugfs_wiphy;

	struct ath_stats stats;

};