linux/drivers/net/wireless/ath/ath9k/debug_sta.c
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   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
  23static 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; tidno < IEEE80211_NUM_TIDS; tidno++) {
  56                tid = ath_node_to_tid(an, tidno);
  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        }
  73exit:
  74        retval = simple_read_from_buffer(user_buf, count, ppos, buf, len);
  75        kfree(buf);
  76
  77        return retval;
  78}
  79
  80static 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
  91void 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->bw == RATE_INFO_BW_40)
 120                        rstats->ht_stats[rxs->rate_idx].ht40_cnt++;
 121                else
 122                        rstats->ht_stats[rxs->rate_idx].ht20_cnt++;
 123
 124                if (rxs->enc_flags & RX_ENC_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->enc_flags & RX_ENC_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        }
 147exit:
 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
 168static 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
 208legacy:
 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
 238static 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
 245void 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", 0444, dir, an, &fops_node_aggr);
 253        debugfs_create_file("node_recv", 0444, dir, an, &fops_node_recv);
 254}
 255