drivers/net/wireless/ath/ath9k/debug_sta.c

   1 /*
   2  * Copyright (c) 2013 Qualcomm Atheros, Inc.
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #include "ath9k.h"
  18
  19 /*************/
  20 /* node_aggr */
  21 /*************/
  22
  23 static ssize_t read_file_node_aggr(struct file *file, char __user *user_buf,
  24                                    size_t count, loff_t *ppos)
  25 {
  26         struct ath_node *an = file->private_data;
  27         struct ath_softc *sc = an->sc;
  28         struct ath_atx_tid *tid;
  29         struct ath_txq *txq;
  30         u32 len = 0, size = 4096;
  31         char *buf;
  32         size_t retval;
  33         int tidno;
  34
  35         buf = kzalloc(size, GFP_KERNEL);
  36         if (buf == NULL)
  37                 return -ENOMEM;
  38
  39         if (!an->sta->ht_cap.ht_supported) {
  40                 len = scnprintf(buf, size, "%s\n",
  41                                 "HT not supported");
  42                 goto exit;
  43         }
  44
  45         len = scnprintf(buf, size, "Max-AMPDU: %d\n",
  46                         an->maxampdu);
  47         len += scnprintf(buf + len, size - len, "MPDU Density: %d\n\n",
  48                          an->mpdudensity);
  49
  50         len += scnprintf(buf + len, size - len,
  51                          "\n%3s%11s%10s%10s%10s%10s%9s%6s%8s\n",
  52                          "TID", "SEQ_START", "SEQ_NEXT", "BAW_SIZE",
  53                          "BAW_HEAD", "BAW_TAIL", "BAR_IDX", "SCHED", "PAUSED");
  54
  55         for (tidno = 0, tid = &an->tid[tidno];
  56              tidno < IEEE80211_NUM_TIDS; tidno++, tid++) {
  57                 txq = tid->txq;
  58                 ath_txq_lock(sc, txq);
  59                 if (tid->active) {
  60                         len += scnprintf(buf + len, size - len,
  61                                          "%3d%11d%10d%10d%10d%10d%9d%6d\n",
  62                                          tid->tidno,
  63                                          tid->seq_start,
  64                                          tid->seq_next,
  65                                          tid->baw_size,
  66                                          tid->baw_head,
  67                                          tid->baw_tail,
  68                                          tid->bar_index,
  69                                          !list_empty(&tid->list));
  70                 }
  71                 ath_txq_unlock(sc, txq);
  72         }
  73 exit:
  74         retval = simple_read_from_buffer(user_buf, count, ppos, buf, len);
  75         kfree(buf);
  76
  77         return retval;
  78 }
  79
  80 static const struct file_operations fops_node_aggr = {
  81         .read = read_file_node_aggr,
  82         .open = simple_open,
  83         .owner = THIS_MODULE,
  84         .llseek = default_llseek,
  85 };
  86
  87 /*************/
  88 /* node_recv */
  89 /*************/
  90
  91 void ath_debug_rate_stats(struct ath_softc *sc,
  92                           struct ath_rx_status *rs,
  93                           struct sk_buff *skb)
  94 {
  95         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
  96         struct ath_hw *ah = sc->sc_ah;
  97         struct ieee80211_rx_status *rxs;
  98         struct ath_rx_rate_stats *rstats;
  99         struct ieee80211_sta *sta;
 100         struct ath_node *an;
 101
 102         if (!ieee80211_is_data(hdr->frame_control))
 103                 return;
 104
 105         rcu_read_lock();
 106
 107         sta = ieee80211_find_sta_by_ifaddr(sc->hw, hdr->addr2, NULL);
 108         if (!sta)
 109                 goto exit;
 110
 111         an = (struct ath_node *) sta->drv_priv;
 112         rstats = &an->rx_rate_stats;
 113         rxs = IEEE80211_SKB_RXCB(skb);
 114
 115         if (IS_HT_RATE(rs->rs_rate)) {
 116                 if (rxs->rate_idx >= ARRAY_SIZE(rstats->ht_stats))
 117                         goto exit;
 118
 119                 if (rxs->flag & RX_FLAG_40MHZ)
 120                         rstats->ht_stats[rxs->rate_idx].ht40_cnt++;
 121                 else
 122                         rstats->ht_stats[rxs->rate_idx].ht20_cnt++;
 123
 124                 if (rxs->flag & RX_FLAG_SHORT_GI)
 125                         rstats->ht_stats[rxs->rate_idx].sgi_cnt++;
 126                 else
 127                         rstats->ht_stats[rxs->rate_idx].lgi_cnt++;
 128
 129                 goto exit;
 130         }
 131
 132         if (IS_CCK_RATE(rs->rs_rate)) {
 133                 if (rxs->flag & RX_FLAG_SHORTPRE)
 134                         rstats->cck_stats[rxs->rate_idx].cck_sp_cnt++;
 135                 else
 136                         rstats->cck_stats[rxs->rate_idx].cck_lp_cnt++;
 137
 138                 goto exit;
 139         }
 140
 141         if (IS_OFDM_RATE(rs->rs_rate)) {
 142                 if (ah->curchan->chan->band == NL80211_BAND_2GHZ)
 143                         rstats->ofdm_stats[rxs->rate_idx - 4].ofdm_cnt++;
 144                 else
 145                         rstats->ofdm_stats[rxs->rate_idx].ofdm_cnt++;
 146         }
 147 exit:
 148         rcu_read_unlock();
 149 }
 150
 151 #define PRINT_CCK_RATE(str, i, sp)                                      \
 152         do {                                                            \
 153                 len += scnprintf(buf + len, size - len,                 \
 154                          "%11s : %10u\n",                               \
 155                          str,                                           \
 156                          (sp) ? rstats->cck_stats[i].cck_sp_cnt :       \
 157                          rstats->cck_stats[i].cck_lp_cnt);              \
 158         } while (0)
 159
 160 #define PRINT_OFDM_RATE(str, i)                                 \
 161         do {                                                    \
 162                 len += scnprintf(buf + len, size - len,         \
 163                          "%11s : %10u\n",                       \
 164                          str,                                   \
 165                          rstats->ofdm_stats[i].ofdm_cnt);       \
 166         } while (0)
 167
 168 static ssize_t read_file_node_recv(struct file *file, char __user *user_buf,
 169                                    size_t count, loff_t *ppos)
 170 {
 171         struct ath_node *an = file->private_data;
 172         struct ath_softc *sc = an->sc;
 173         struct ath_hw *ah = sc->sc_ah;
 174         struct ath_rx_rate_stats *rstats;
 175         struct ieee80211_sta *sta = an->sta;
 176         enum nl80211_band band;
 177         u32 len = 0, size = 4096;
 178         char *buf;
 179         size_t retval;
 180         int i;
 181
 182         buf = kzalloc(size, GFP_KERNEL);
 183         if (buf == NULL)
 184                 return -ENOMEM;
 185
 186         band = ah->curchan->chan->band;
 187         rstats = &an->rx_rate_stats;
 188
 189         if (!sta->ht_cap.ht_supported)
 190                 goto legacy;
 191
 192         len += scnprintf(buf + len, size - len,
 193                          "%24s%10s%10s%10s\n",
 194                          "HT20", "HT40", "SGI", "LGI");
 195
 196         for (i = 0; i < 24; i++) {
 197                 len += scnprintf(buf + len, size - len,
 198                                  "%8s%3u : %10u%10u%10u%10u\n",
 199                                  "MCS", i,
 200                                  rstats->ht_stats[i].ht20_cnt,
 201                                  rstats->ht_stats[i].ht40_cnt,
 202                                  rstats->ht_stats[i].sgi_cnt,
 203                                  rstats->ht_stats[i].lgi_cnt);
 204         }
 205
 206         len += scnprintf(buf + len, size - len, "\n");
 207
 208 legacy:
 209         if (band == NL80211_BAND_2GHZ) {
 210                 PRINT_CCK_RATE("CCK-1M/LP", 0, false);
 211                 PRINT_CCK_RATE("CCK-2M/LP", 1, false);
 212                 PRINT_CCK_RATE("CCK-5.5M/LP", 2, false);
 213                 PRINT_CCK_RATE("CCK-11M/LP", 3, false);
 214
 215                 PRINT_CCK_RATE("CCK-2M/SP", 1, true);
 216                 PRINT_CCK_RATE("CCK-5.5M/SP", 2, true);
 217                 PRINT_CCK_RATE("CCK-11M/SP", 3, true);
 218         }
 219
 220         PRINT_OFDM_RATE("OFDM-6M", 0);
 221         PRINT_OFDM_RATE("OFDM-9M", 1);
 222         PRINT_OFDM_RATE("OFDM-12M", 2);
 223         PRINT_OFDM_RATE("OFDM-18M", 3);
 224         PRINT_OFDM_RATE("OFDM-24M", 4);
 225         PRINT_OFDM_RATE("OFDM-36M", 5);
 226         PRINT_OFDM_RATE("OFDM-48M", 6);
 227         PRINT_OFDM_RATE("OFDM-54M", 7);
 228
 229         retval = simple_read_from_buffer(user_buf, count, ppos, buf, len);
 230         kfree(buf);
 231
 232         return retval;
 233 }
 234
 235 #undef PRINT_OFDM_RATE
 236 #undef PRINT_CCK_RATE
 237
 238 static const struct file_operations fops_node_recv = {
 239         .read = read_file_node_recv,
 240         .open = simple_open,
 241         .owner = THIS_MODULE,
 242         .llseek = default_llseek,
 243 };
 244
 245 void ath9k_sta_add_debugfs(struct ieee80211_hw *hw,
 246                            struct ieee80211_vif *vif,
 247                            struct ieee80211_sta *sta,
 248                            struct dentry *dir)
 249 {
 250         struct ath_node *an = (struct ath_node *)sta->drv_priv;
 251
 252         debugfs_create_file("node_aggr", S_IRUGO, dir, an, &fops_node_aggr);
 253         debugfs_create_file("node_recv", S_IRUGO, dir, an, &fops_node_recv);
 254 }