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Commit 80a3511d authored by Luis R. Rodriguez's avatar Luis R. Rodriguez Committed by John W. Linville
Browse files

cfg80211: add debugfs HT40 allow map 



Here's a screenshot of what this looks like with ath9k:

mcgrof@pogo /debug/ieee80211/phy0 $ cat ht40allow_map
2412 HT40  +
2417 HT40  +
2422 HT40  +
2427 HT40  +
2432 HT40 -+
2437 HT40 -+
2442 HT40 -+
2447 HT40 -
2452 HT40 -
2457 HT40 -
2462 HT40 -
2467 Disabled
2472 Disabled
2484 Disabled
5180 HT40  +
5200 HT40 -+
5220 HT40 -+
5240 HT40 -+
5260 HT40 -+
5280 HT40 -+
5300 HT40 -+
5320 HT40 -
5500 HT40  +
5520 HT40 -+
5540 HT40 -+
5560 HT40 -+
5580 HT40 -+
5600 HT40 -+
5620 HT40 -+
5640 HT40 -+
5660 HT40 -+
5680 HT40 -+
5700 HT40 -
5745 HT40  +
5765 HT40 -+
5785 HT40 -+
5805 HT40 -+
5825 HT40 -

Signed-off-by: default avatarLuis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 1ac61302

net/wireless/core.h

+1 −0
Original line number Diff line number Diff line
@@ -58,6 +58,7 @@ struct cfg80211_registered_device { 
		struct dentry *fragmentation_threshold;

		struct dentry *short_retry_limit;

		struct dentry *long_retry_limit;

		struct dentry *ht40allow_map;

	} debugfs;

#endif

net/wireless/debugfs.c

+61 −0
Original line number Diff line number Diff line
@@ -44,6 +44,65 @@ DEBUGFS_READONLY_FILE(short_retry_limit, 20, "%d", 
DEBUGFS_READONLY_FILE(long_retry_limit, 20, "%d",

		      wiphy->retry_long);



static int ht_print_chan(struct ieee80211_channel *chan,

			 char *buf, int buf_size, int offset)

{

	if (WARN_ON(offset > buf_size))

		return 0;



	if (chan->flags & IEEE80211_CHAN_DISABLED)

		return snprintf(buf + offset,

				buf_size - offset,

				"%d Disabled\n",

				chan->center_freq);



	return snprintf(buf + offset,

			buf_size - offset,

			"%d HT40 %c%c\n",

			chan->center_freq,

			(chan->flags & IEEE80211_CHAN_NO_HT40MINUS) ? ' ' : '-',

			(chan->flags & IEEE80211_CHAN_NO_HT40PLUS)  ? ' ' : '+');

}



static ssize_t ht40allow_map_read(struct file *file,

				  char __user *user_buf,

				  size_t count, loff_t *ppos)

{

	struct wiphy *wiphy = file->private_data;

	char *buf;

	unsigned int offset = 0, buf_size = PAGE_SIZE, i, r;

	enum ieee80211_band band;

	struct ieee80211_supported_band *sband;



	buf = kzalloc(buf_size, GFP_KERNEL);

	if (!buf)

		return -ENOMEM;



	mutex_lock(&cfg80211_mutex);



	for (band = 0; band < IEEE80211_NUM_BANDS; band++) {

		sband = wiphy->bands[band];

		if (!sband)

			continue;

		for (i = 0; i < sband->n_channels; i++)

			offset += ht_print_chan(&sband->channels[i],

						buf, buf_size, offset);

	}



	mutex_unlock(&cfg80211_mutex);



	r = simple_read_from_buffer(user_buf, count, ppos, buf, offset);



	kfree(buf);



	return r;

}



static const struct file_operations ht40allow_map_ops = {

	.read = ht40allow_map_read,

	.open = cfg80211_open_file_generic,

};



#define DEBUGFS_ADD(name)						\

	drv->debugfs.name = debugfs_create_file(#name, S_IRUGO, phyd,	\

						  &drv->wiphy, &name## _ops);
@@ -59,6 +118,7 @@ void cfg80211_debugfs_drv_add(struct cfg80211_registered_device *drv) 
	DEBUGFS_ADD(fragmentation_threshold);

	DEBUGFS_ADD(short_retry_limit);

	DEBUGFS_ADD(long_retry_limit);

	DEBUGFS_ADD(ht40allow_map);

}



void cfg80211_debugfs_drv_del(struct cfg80211_registered_device *drv)
@@ -67,4 +127,5 @@ void cfg80211_debugfs_drv_del(struct cfg80211_registered_device *drv) 
	DEBUGFS_DEL(fragmentation_threshold);

	DEBUGFS_DEL(short_retry_limit);

	DEBUGFS_DEL(long_retry_limit);

	DEBUGFS_DEL(ht40allow_map);

}