mac80211: add debugfs file for HW queues

Add a debugfs file showing which HW queues were
allocated to a virtual interface, including the
CAB queue for AP interfaces.

Change-Id: I486924e961b6ad6785a79db09620919ee644e703
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 21 insertions, 0 deletions

diff --git a/net/mac80211/debugfs_netdev.c b/net/mac80211/debugfs_netdev.c
index 9b6afb3698f6..ba9bd0ef119a 100644
--- a/net/mac80211/debugfs_netdev.c
+++ b/net/mac80211/debugfs_netdev.c
@@ -173,6 +173,26 @@ IEEE80211_IF_FILE(txpower, vif.bss_conf.txpower, DEC);
 IEEE80211_IF_FILE(ap_power_level, ap_power_level, DEC);
 IEEE80211_IF_FILE(user_power_level, user_power_level, DEC);
 
+static ssize_t
+ieee80211_if_fmt_hw_queues(const struct ieee80211_sub_if_data *sdata,
+                           char *buf, int buflen)
+{
+        int len;
+
+        len = scnprintf(buf, buflen, "AC queues: VO:%d VI:%d BE:%d BK:%d\n",
+                        sdata->vif.hw_queue[IEEE80211_AC_VO],
+                        sdata->vif.hw_queue[IEEE80211_AC_VI],
+                        sdata->vif.hw_queue[IEEE80211_AC_BE],
+                        sdata->vif.hw_queue[IEEE80211_AC_BK]);
+
+        if (sdata->vif.type == NL80211_IFTYPE_AP)
+                len += scnprintf(buf + len, buflen - len, "cab queue: %d\n",
+                                 sdata->vif.cab_queue);
+
+        return len;
+}
+__IEEE80211_IF_FILE(hw_queues, NULL);
+
 /* STA attributes */
 IEEE80211_IF_FILE(bssid, u.mgd.bssid, MAC);
 IEEE80211_IF_FILE(aid, u.mgd.aid, DEC);
@@ -511,6 +531,7 @@ static void add_common_files(struct ieee80211_sub_if_data *sdata)
         DEBUGFS_ADD(rc_rateidx_mask_5ghz);
         DEBUGFS_ADD(rc_rateidx_mcs_mask_2ghz);
         DEBUGFS_ADD(rc_rateidx_mcs_mask_5ghz);
+        DEBUGFS_ADD(hw_queues);
 }
 
 static void add_sta_files(struct ieee80211_sub_if_data *sdata)