git.openwrt.org Git - openwrt/staging/981213.git/blob

   1 From: Felix Fietkau <nbd@nbd.name>
   2 Date: Sat, 25 Jun 2022 21:25:40 +0200
   3 Subject: [PATCH] mac80211: add debugfs file to display per-phy AQL pending
   4  airtime
   5
   6 Now that the global pending airtime is more relevant for airtime fairness,
   7 it makes sense to make it accessible via debugfs for debugging
   8
   9 Signed-off-by: Felix Fietkau <nbd@nbd.name>
  10 ---
  11
  12 --- a/net/mac80211/debugfs.c
  13 +++ b/net/mac80211/debugfs.c
  14 @@ -201,6 +201,36 @@ static const struct file_operations airt
  15         .llseek = default_llseek,
  16  };
  17
  18 +static ssize_t aql_pending_read(struct file *file,
  19 +                               char __user *user_buf,
  20 +                               size_t count, loff_t *ppos)
  21 +{
  22 +       struct ieee80211_local *local = file->private_data;
  23 +       char buf[400];
  24 +       int len = 0;
  25 +
  26 +       len = scnprintf(buf, sizeof(buf),
  27 +                       "AC     AQL pending\n"
  28 +                       "VO     %u us\n"
  29 +                       "VI     %u us\n"
  30 +                       "BE     %u us\n"
  31 +                       "BK     %u us\n"
  32 +                       "total  %u us\n",
  33 +                       atomic_read(&local->aql_ac_pending_airtime[IEEE80211_AC_VO]),
  34 +                       atomic_read(&local->aql_ac_pending_airtime[IEEE80211_AC_VI]),
  35 +                       atomic_read(&local->aql_ac_pending_airtime[IEEE80211_AC_BE]),
  36 +                       atomic_read(&local->aql_ac_pending_airtime[IEEE80211_AC_BK]),
  37 +                       atomic_read(&local->aql_total_pending_airtime));
  38 +       return simple_read_from_buffer(user_buf, count, ppos,
  39 +                                      buf, len);
  40 +}
  41 +
  42 +static const struct file_operations aql_pending_ops = {
  43 +       .read = aql_pending_read,
  44 +       .open = simple_open,
  45 +       .llseek = default_llseek,
  46 +};
  47 +
  48  static ssize_t aql_txq_limit_read(struct file *file,
  49                                   char __user *user_buf,
  50                                   size_t count,
  51 @@ -628,6 +658,7 @@ void debugfs_hw_add(struct ieee80211_loc
  52         DEBUGFS_ADD(hw_conf);
  53         DEBUGFS_ADD_MODE(force_tx_status, 0600);
  54         DEBUGFS_ADD_MODE(aql_enable, 0600);
  55 +       DEBUGFS_ADD(aql_pending);
  56
  57         if (local->ops->wake_tx_queue)
  58                 DEBUGFS_ADD_MODE(aqm, 0600);