mac80211: Read the TSF via debugfs

This patch adds an low-level driver independent entry to read the TSF value into the debugfs of mac80211. This makes debugging the IBSS handling of wifi drivers easier.

Signed-off-by: Alina Friedrichsen <x-alina@gmx.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

2 files changed, 5 insertions, 0 deletions

diff --git a/net/mac80211/debugfs.c b/net/mac80211/debugfs.c
index 18541bb7509..717d5484e1e 100644
--- a/net/mac80211/debugfs.c
+++ b/net/mac80211/debugfs.c
@@ -61,6 +61,8 @@ DEBUGFS_READONLY_FILE(wep_iv, 20, "%#06x",
                       local->wep_iv & 0xffffff);
 DEBUGFS_READONLY_FILE(rate_ctrl_alg, 100, "%s",
                       local->rate_ctrl ? local->rate_ctrl->ops->name : "<unset>");
+DEBUGFS_READONLY_FILE(tsf, 20, "%#018llx",
+                      (unsigned long long) (local->ops->get_tsf ? local->ops->get_tsf(local_to_hw(local)) : 0));
 
 /* statistics stuff */
 
@@ -202,6 +204,7 @@ void debugfs_hw_add(struct ieee80211_local *local)
         DEBUGFS_ADD(long_retry_limit);
         DEBUGFS_ADD(total_ps_buffered);
         DEBUGFS_ADD(wep_iv);
+        DEBUGFS_ADD(tsf);
 
         statsd = debugfs_create_dir("statistics", phyd);
         local->debugfs.statistics = statsd;
@@ -255,6 +258,7 @@ void debugfs_hw_del(struct ieee80211_local *local)
         DEBUGFS_DEL(long_retry_limit);
         DEBUGFS_DEL(total_ps_buffered);
         DEBUGFS_DEL(wep_iv);
+        DEBUGFS_DEL(tsf);
 
         DEBUGFS_STATS_DEL(transmitted_fragment_count);
         DEBUGFS_STATS_DEL(multicast_transmitted_frame_count);
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index 70366efc792..927cbde8c19 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -744,6 +744,7 @@ struct ieee80211_local {
                 struct dentry *long_retry_limit;
                 struct dentry *total_ps_buffered;
                 struct dentry *wep_iv;
+                struct dentry *tsf;
                 struct dentry *statistics;
                 struct local_debugfsdentries_statsdentries {
                         struct dentry *transmitted_fragment_count;