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cfg80211: add debugfs HT40 allow map

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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: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Luis R. Rodriguez 2009-05-02 00:39:30 -04:00 committed by John W. Linville
parent 1ac61302dc
commit 80a3511d70
2 changed files with 62 additions and 0 deletions
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1
net/wireless/core.h
View File

@ -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

61
net/wireless/debugfs.c
View File

@ -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);
}