kernel/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_atx_ac *ac;
  30         struct ath_txq *txq;
  31         u32 len = 0, size = 4096;
  32         char *buf;
  33         size_t retval;
  34         int tidno, acno;
  35
  36         buf = kzalloc(size, GFP_KERNEL);
  37         if (buf == NULL)
  38                 return -ENOMEM;
  39
  40         if (!an->sta->ht_cap.ht_supported) {
  41                 len = scnprintf(buf, size, "%s\n",
  42                                 "HT not supported");
  43                 goto exit;
  44         }
  45
  46         len = scnprintf(buf, size, "Max-AMPDU: %d\n",
  47                         an->maxampdu);
  48         len += scnprintf(buf + len, size - len, "MPDU Density: %d\n\n",
  49                          an->mpdudensity);
  50
  51         len += scnprintf(buf + len, size - len,
  52                          "%2s%7s\n", "AC", "SCHED");
  53
  54         for (acno = 0, ac = &an->ac[acno];
  55              acno < IEEE80211_NUM_ACS; acno++, ac++) {
  56                 txq = ac->txq;
  57                 ath_txq_lock(sc, txq);
  58                 len += scnprintf(buf + len, size - len,
  59                                  "%2d%7d\n",
  60                                  acno, ac->sched);
  61                 ath_txq_unlock(sc, txq);
  62         }
  63
  64         len += scnprintf(buf + len, size - len,
  65                          "\n%3s%11s%10s%10s%10s%10s%9s%6s%8s\n",
  66                          "TID", "SEQ_START", "SEQ_NEXT", "BAW_SIZE",
  67                          "BAW_HEAD", "BAW_TAIL", "BAR_IDX", "SCHED", "PAUSED");
  68
  69         for (tidno = 0, tid = &an->tid[tidno];
  70              tidno < IEEE80211_NUM_TIDS; tidno++, tid++) {
  71                 txq = tid->ac->txq;
  72                 ath_txq_lock(sc, txq);
  73                 if (tid->active) {
  74                         len += scnprintf(buf + len, size - len,
  75                                          "%3d%11d%10d%10d%10d%10d%9d%6d\n",
  76                                          tid->tidno,
  77                                          tid->seq_start,
  78                                          tid->seq_next,
  79                                          tid->baw_size,
  80                                          tid->baw_head,
  81                                          tid->baw_tail,
  82                                          tid->bar_index,
  83                                          tid->sched);
  84                 }
  85                 ath_txq_unlock(sc, txq);
  86         }
  87 exit:
  88         retval = simple_read_from_buffer(user_buf, count, ppos, buf, len);
  89         kfree(buf);
  90
  91         return retval;
  92 }
  93
  94 static const struct file_operations fops_node_aggr = {
  95         .read = read_file_node_aggr,
  96         .open = simple_open,
  97         .owner = THIS_MODULE,
  98         .llseek = default_llseek,
  99 };
 100
 101 /*************/
 102 /* node_recv */
 103 /*************/
 104
 105 void ath_debug_rate_stats(struct ath_softc *sc,
 106                           struct ath_rx_status *rs,
 107                           struct sk_buff *skb)
 108 {
 109         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 110         struct ath_hw *ah = sc->sc_ah;
 111         struct ieee80211_rx_status *rxs;
 112         struct ath_rx_rate_stats *rstats;
 113         struct ieee80211_sta *sta;
 114         struct ath_node *an;
 115
 116         if (!ieee80211_is_data(hdr->frame_control))
 117                 return;
 118
 119         rcu_read_lock();
 120
 121         sta = ieee80211_find_sta_by_ifaddr(sc->hw, hdr->addr2, NULL);
 122         if (!sta)
 123                 goto exit;
 124
 125         an = (struct ath_node *) sta->drv_priv;
 126         rstats = &an->rx_rate_stats;
 127         rxs = IEEE80211_SKB_RXCB(skb);
 128
 129         if (IS_HT_RATE(rs->rs_rate)) {
 130                 if (rxs->rate_idx >= ARRAY_SIZE(rstats->ht_stats))
 131                         goto exit;
 132
 133                 if (rxs->flag & RX_FLAG_40MHZ)
 134                         rstats->ht_stats[rxs->rate_idx].ht40_cnt++;
 135                 else
 136                         rstats->ht_stats[rxs->rate_idx].ht20_cnt++;
 137
 138                 if (rxs->flag & RX_FLAG_SHORT_GI)
 139                         rstats->ht_stats[rxs->rate_idx].sgi_cnt++;
 140                 else
 141                         rstats->ht_stats[rxs->rate_idx].lgi_cnt++;
 142
 143                 goto exit;
 144         }
 145
 146         if (IS_CCK_RATE(rs->rs_rate)) {
 147                 if (rxs->flag & RX_FLAG_SHORTPRE)
 148                         rstats->cck_stats[rxs->rate_idx].cck_sp_cnt++;
 149                 else
 150                         rstats->cck_stats[rxs->rate_idx].cck_lp_cnt++;
 151
 152                 goto exit;
 153         }
 154
 155         if (IS_OFDM_RATE(rs->rs_rate)) {
 156                 if (ah->curchan->chan->band == IEEE80211_BAND_2GHZ)
 157                         rstats->ofdm_stats[rxs->rate_idx - 4].ofdm_cnt++;
 158                 else
 159                         rstats->ofdm_stats[rxs->rate_idx].ofdm_cnt++;
 160         }
 161 exit:
 162         rcu_read_unlock();
 163 }
 164
 165 #define PRINT_CCK_RATE(str, i, sp)                                      \
 166         do {                                                            \
 167                 len += scnprintf(buf + len, size - len,                 \
 168                          "%11s : %10u\n",                               \
 169                          str,                                           \
 170                          (sp) ? rstats->cck_stats[i].cck_sp_cnt :       \
 171                          rstats->cck_stats[i].cck_lp_cnt);              \
 172         } while (0)
 173
 174 #define PRINT_OFDM_RATE(str, i)                                 \
 175         do {                                                    \
 176                 len += scnprintf(buf + len, size - len,         \
 177                          "%11s : %10u\n",                       \
 178                          str,                                   \
 179                          rstats->ofdm_stats[i].ofdm_cnt);       \
 180         } while (0)
 181
 182 static ssize_t read_file_node_recv(struct file *file, char __user *user_buf,
 183                                    size_t count, loff_t *ppos)
 184 {
 185         struct ath_node *an = file->private_data;
 186         struct ath_softc *sc = an->sc;
 187         struct ath_hw *ah = sc->sc_ah;
 188         struct ath_rx_rate_stats *rstats;
 189         struct ieee80211_sta *sta = an->sta;
 190         enum ieee80211_band band;
 191         u32 len = 0, size = 4096;
 192         char *buf;
 193         size_t retval;
 194         int i;
 195
 196         buf = kzalloc(size, GFP_KERNEL);
 197         if (buf == NULL)
 198                 return -ENOMEM;
 199
 200         band = ah->curchan->chan->band;
 201         rstats = &an->rx_rate_stats;
 202
 203         if (!sta->ht_cap.ht_supported)
 204                 goto legacy;
 205
 206         len += scnprintf(buf + len, size - len,
 207                          "%24s%10s%10s%10s\n",
 208                          "HT20", "HT40", "SGI", "LGI");
 209
 210         for (i = 0; i < 24; i++) {
 211                 len += scnprintf(buf + len, size - len,
 212                                  "%8s%3u : %10u%10u%10u%10u\n",
 213                                  "MCS", i,
 214                                  rstats->ht_stats[i].ht20_cnt,
 215                                  rstats->ht_stats[i].ht40_cnt,
 216                                  rstats->ht_stats[i].sgi_cnt,
 217                                  rstats->ht_stats[i].lgi_cnt);
 218         }
 219
 220         len += scnprintf(buf + len, size - len, "\n");
 221
 222 legacy:
 223         if (band == IEEE80211_BAND_2GHZ) {
 224                 PRINT_CCK_RATE("CCK-1M/LP", 0, false);
 225                 PRINT_CCK_RATE("CCK-2M/LP", 1, false);
 226                 PRINT_CCK_RATE("CCK-5.5M/LP", 2, false);
 227                 PRINT_CCK_RATE("CCK-11M/LP", 3, false);
 228
 229                 PRINT_CCK_RATE("CCK-2M/SP", 1, true);
 230                 PRINT_CCK_RATE("CCK-5.5M/SP", 2, true);
 231                 PRINT_CCK_RATE("CCK-11M/SP", 3, true);
 232         }
 233
 234         PRINT_OFDM_RATE("OFDM-6M", 0);
 235         PRINT_OFDM_RATE("OFDM-9M", 1);
 236         PRINT_OFDM_RATE("OFDM-12M", 2);
 237         PRINT_OFDM_RATE("OFDM-18M", 3);
 238         PRINT_OFDM_RATE("OFDM-24M", 4);
 239         PRINT_OFDM_RATE("OFDM-36M", 5);
 240         PRINT_OFDM_RATE("OFDM-48M", 6);
 241         PRINT_OFDM_RATE("OFDM-54M", 7);
 242
 243         retval = simple_read_from_buffer(user_buf, count, ppos, buf, len);
 244         kfree(buf);
 245
 246         return retval;
 247 }
 248
 249 #undef PRINT_OFDM_RATE
 250 #undef PRINT_CCK_RATE
 251
 252 static const struct file_operations fops_node_recv = {
 253         .read = read_file_node_recv,
 254         .open = simple_open,
 255         .owner = THIS_MODULE,
 256         .llseek = default_llseek,
 257 };
 258
 259 void ath9k_sta_add_debugfs(struct ieee80211_hw *hw,
 260                            struct ieee80211_vif *vif,
 261                            struct ieee80211_sta *sta,
 262                            struct dentry *dir)
 263 {
 264         struct ath_node *an = (struct ath_node *)sta->drv_priv;
 265
 266         debugfs_create_file("node_aggr", S_IRUGO, dir, an, &fops_node_aggr);
 267         debugfs_create_file("node_recv", S_IRUGO, dir, an, &fops_node_recv);
 268 }