drivers/net/wireless/ath9k/debug.c

   1 /*
   2  * Copyright (c) 2008 Atheros Communications 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 static unsigned int ath9k_debug = DBG_DEFAULT;
  20 module_param_named(debug, ath9k_debug, uint, 0);
  21
  22 void DPRINTF(struct ath_softc *sc, int dbg_mask, const char *fmt, ...)
  23 {
  24         if (!sc)
  25                 return;
  26
  27         if (sc->debug.debug_mask & dbg_mask) {
  28                 va_list args;
  29
  30                 va_start(args, fmt);
  31                 printk(KERN_DEBUG "ath9k: ");
  32                 vprintk(fmt, args);
  33                 va_end(args);
  34         }
  35 }
  36
  37 static int ath9k_debugfs_open(struct inode *inode, struct file *file)
  38 {
  39         file->private_data = inode->i_private;
  40         return 0;
  41 }
  42
  43 static ssize_t read_file_dma(struct file *file, char __user *user_buf,
  44                              size_t count, loff_t *ppos)
  45 {
  46         struct ath_softc *sc = file->private_data;
  47         struct ath_hal *ah = sc->sc_ah;
  48         char buf[1024];
  49         unsigned int len = 0;
  50         u32 val[ATH9K_NUM_DMA_DEBUG_REGS];
  51         int i, qcuOffset = 0, dcuOffset = 0;
  52         u32 *qcuBase = &val[0], *dcuBase = &val[4];
  53
  54         REG_WRITE(ah, AR_MACMISC,
  55                   ((AR_MACMISC_DMA_OBS_LINE_8 << AR_MACMISC_DMA_OBS_S) |
  56                    (AR_MACMISC_MISC_OBS_BUS_1 <<
  57                     AR_MACMISC_MISC_OBS_BUS_MSB_S)));
  58
  59         len += snprintf(buf + len, sizeof(buf) - len,
  60                         "Raw DMA Debug values:\n");
  61
  62         for (i = 0; i < ATH9K_NUM_DMA_DEBUG_REGS; i++) {
  63                 if (i % 4 == 0)
  64                         len += snprintf(buf + len, sizeof(buf) - len, "\n");
  65
  66                 val[i] = REG_READ(ah, AR_DMADBG_0 + (i * sizeof(u32)));
  67                 len += snprintf(buf + len, sizeof(buf) - len, "%d: %08x ",
  68                                 i, val[i]);
  69         }
  70
  71         len += snprintf(buf + len, sizeof(buf) - len, "\n\n");
  72         len += snprintf(buf + len, sizeof(buf) - len,
  73                         "Num QCU: chain_st fsp_ok fsp_st DCU: chain_st\n");
  74
  75         for (i = 0; i < ATH9K_NUM_QUEUES; i++, qcuOffset += 4, dcuOffset += 5) {
  76                 if (i == 8) {
  77                         qcuOffset = 0;
  78                         qcuBase++;
  79                 }
  80
  81                 if (i == 6) {
  82                         dcuOffset = 0;
  83                         dcuBase++;
  84                 }
  85
  86                 len += snprintf(buf + len, sizeof(buf) - len,
  87                         "%2d          %2x      %1x     %2x           %2x\n",
  88                         i, (*qcuBase & (0x7 << qcuOffset)) >> qcuOffset,
  89                         (*qcuBase & (0x8 << qcuOffset)) >> (qcuOffset + 3),
  90                         val[2] & (0x7 << (i * 3)) >> (i * 3),
  91                         (*dcuBase & (0x1f << dcuOffset)) >> dcuOffset);
  92         }
  93
  94         len += snprintf(buf + len, sizeof(buf) - len, "\n");
  95
  96         len += snprintf(buf + len, sizeof(buf) - len,
  97                 "qcu_stitch state:   %2x    qcu_fetch state:        %2x\n",
  98                 (val[3] & 0x003c0000) >> 18, (val[3] & 0x03c00000) >> 22);
  99         len += snprintf(buf + len, sizeof(buf) - len,
 100                 "qcu_complete state: %2x    dcu_complete state:     %2x\n",
 101                 (val[3] & 0x1c000000) >> 26, (val[6] & 0x3));
 102         len += snprintf(buf + len, sizeof(buf) - len,
 103                 "dcu_arb state:      %2x    dcu_fp state:           %2x\n",
 104                 (val[5] & 0x06000000) >> 25, (val[5] & 0x38000000) >> 27);
 105         len += snprintf(buf + len, sizeof(buf) - len,
 106                 "chan_idle_dur:     %3d    chan_idle_dur_valid:     %1d\n",
 107                 (val[6] & 0x000003fc) >> 2, (val[6] & 0x00000400) >> 10);
 108         len += snprintf(buf + len, sizeof(buf) - len,
 109                 "txfifo_valid_0:      %1d    txfifo_valid_1:          %1d\n",
 110                 (val[6] & 0x00000800) >> 11, (val[6] & 0x00001000) >> 12);
 111         len += snprintf(buf + len, sizeof(buf) - len,
 112                 "txfifo_dcu_num_0:   %2d    txfifo_dcu_num_1:       %2d\n",
 113                 (val[6] & 0x0001e000) >> 13, (val[6] & 0x001e0000) >> 17);
 114
 115         len += snprintf(buf + len, sizeof(buf) - len, "pcu observe: 0x%x \n",
 116                         REG_READ(ah, AR_OBS_BUS_1));
 117         len += snprintf(buf + len, sizeof(buf) - len,
 118                         "AR_CR: 0x%x \n", REG_READ(ah, AR_CR));
 119
 120         return simple_read_from_buffer(user_buf, count, ppos, buf, len);
 121 }
 122
 123 static const struct file_operations fops_dma = {
 124         .read = read_file_dma,
 125         .open = ath9k_debugfs_open,
 126         .owner = THIS_MODULE
 127 };
 128
 129
 130 void ath_debug_stat_interrupt(struct ath_softc *sc, enum ath9k_int status)
 131 {
 132         if (status)
 133                 sc->debug.stats.istats.total++;
 134         if (status & ATH9K_INT_RX)
 135                 sc->debug.stats.istats.rxok++;
 136         if (status & ATH9K_INT_RXEOL)
 137                 sc->debug.stats.istats.rxeol++;
 138         if (status & ATH9K_INT_RXORN)
 139                 sc->debug.stats.istats.rxorn++;
 140         if (status & ATH9K_INT_TX)
 141                 sc->debug.stats.istats.txok++;
 142         if (status & ATH9K_INT_TXURN)
 143                 sc->debug.stats.istats.txurn++;
 144         if (status & ATH9K_INT_MIB)
 145                 sc->debug.stats.istats.mib++;
 146         if (status & ATH9K_INT_RXPHY)
 147                 sc->debug.stats.istats.rxphyerr++;
 148         if (status & ATH9K_INT_RXKCM)
 149                 sc->debug.stats.istats.rx_keycache_miss++;
 150         if (status & ATH9K_INT_SWBA)
 151                 sc->debug.stats.istats.swba++;
 152         if (status & ATH9K_INT_BMISS)
 153                 sc->debug.stats.istats.bmiss++;
 154         if (status & ATH9K_INT_BNR)
 155                 sc->debug.stats.istats.bnr++;
 156         if (status & ATH9K_INT_CST)
 157                 sc->debug.stats.istats.cst++;
 158         if (status & ATH9K_INT_GTT)
 159                 sc->debug.stats.istats.gtt++;
 160         if (status & ATH9K_INT_TIM)
 161                 sc->debug.stats.istats.tim++;
 162         if (status & ATH9K_INT_CABEND)
 163                 sc->debug.stats.istats.cabend++;
 164         if (status & ATH9K_INT_DTIMSYNC)
 165                 sc->debug.stats.istats.dtimsync++;
 166         if (status & ATH9K_INT_DTIM)
 167                 sc->debug.stats.istats.dtim++;
 168 }
 169
 170 static ssize_t read_file_interrupt(struct file *file, char __user *user_buf,
 171                                    size_t count, loff_t *ppos)
 172 {
 173         struct ath_softc *sc = file->private_data;
 174         char buf[512];
 175         unsigned int len = 0;
 176
 177         len += snprintf(buf + len, sizeof(buf) - len,
 178                 "%8s: %10u\n", "RX", sc->debug.stats.istats.rxok);
 179         len += snprintf(buf + len, sizeof(buf) - len,
 180                 "%8s: %10u\n", "RXEOL", sc->debug.stats.istats.rxeol);
 181         len += snprintf(buf + len, sizeof(buf) - len,
 182                 "%8s: %10u\n", "RXORN", sc->debug.stats.istats.rxorn);
 183         len += snprintf(buf + len, sizeof(buf) - len,
 184                 "%8s: %10u\n", "TX", sc->debug.stats.istats.txok);
 185         len += snprintf(buf + len, sizeof(buf) - len,
 186                 "%8s: %10u\n", "TXURN", sc->debug.stats.istats.txurn);
 187         len += snprintf(buf + len, sizeof(buf) - len,
 188                 "%8s: %10u\n", "MIB", sc->debug.stats.istats.mib);
 189         len += snprintf(buf + len, sizeof(buf) - len,
 190                 "%8s: %10u\n", "RXPHY", sc->debug.stats.istats.rxphyerr);
 191         len += snprintf(buf + len, sizeof(buf) - len,
 192                 "%8s: %10u\n", "RXKCM", sc->debug.stats.istats.rx_keycache_miss);
 193         len += snprintf(buf + len, sizeof(buf) - len,
 194                 "%8s: %10u\n", "SWBA", sc->debug.stats.istats.swba);
 195         len += snprintf(buf + len, sizeof(buf) - len,
 196                 "%8s: %10u\n", "BMISS", sc->debug.stats.istats.bmiss);
 197         len += snprintf(buf + len, sizeof(buf) - len,
 198                 "%8s: %10u\n", "BNR", sc->debug.stats.istats.bnr);
 199         len += snprintf(buf + len, sizeof(buf) - len,
 200                 "%8s: %10u\n", "CST", sc->debug.stats.istats.cst);
 201         len += snprintf(buf + len, sizeof(buf) - len,
 202                 "%8s: %10u\n", "GTT", sc->debug.stats.istats.gtt);
 203         len += snprintf(buf + len, sizeof(buf) - len,
 204                 "%8s: %10u\n", "TIM", sc->debug.stats.istats.tim);
 205         len += snprintf(buf + len, sizeof(buf) - len,
 206                 "%8s: %10u\n", "CABEND", sc->debug.stats.istats.cabend);
 207         len += snprintf(buf + len, sizeof(buf) - len,
 208                 "%8s: %10u\n", "DTIMSYNC", sc->debug.stats.istats.dtimsync);
 209         len += snprintf(buf + len, sizeof(buf) - len,
 210                 "%8s: %10u\n", "DTIM", sc->debug.stats.istats.dtim);
 211         len += snprintf(buf + len, sizeof(buf) - len,
 212                 "%8s: %10u\n", "TOTAL", sc->debug.stats.istats.total);
 213
 214         return simple_read_from_buffer(user_buf, count, ppos, buf, len);
 215 }
 216
 217 static const struct file_operations fops_interrupt = {
 218         .read = read_file_interrupt,
 219         .open = ath9k_debugfs_open,
 220         .owner = THIS_MODULE
 221 };
 222
 223 static void ath_debug_stat_11n_rc(struct ath_softc *sc, struct sk_buff *skb)
 224 {
 225         struct ath_tx_info_priv *tx_info_priv = NULL;
 226         struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
 227         struct ieee80211_tx_rate *rates = tx_info->status.rates;
 228         int final_ts_idx, idx;
 229
 230         tx_info_priv = ATH_TX_INFO_PRIV(tx_info);
 231         final_ts_idx = tx_info_priv->tx.ts_rateindex;
 232         idx = sc->cur_rate_table->info[rates[final_ts_idx].idx].dot11rate;
 233
 234         sc->debug.stats.n_rcstats[idx].success++;
 235 }
 236
 237 static void ath_debug_stat_legacy_rc(struct ath_softc *sc, struct sk_buff *skb)
 238 {
 239         struct ath_tx_info_priv *tx_info_priv = NULL;
 240         struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
 241         struct ieee80211_tx_rate *rates = tx_info->status.rates;
 242         int final_ts_idx, idx;
 243
 244         tx_info_priv = ATH_TX_INFO_PRIV(tx_info);
 245         final_ts_idx = tx_info_priv->tx.ts_rateindex;
 246         idx = rates[final_ts_idx].idx;
 247
 248         sc->debug.stats.legacy_rcstats[idx].success++;
 249 }
 250
 251 void ath_debug_stat_rc(struct ath_softc *sc, struct sk_buff *skb)
 252 {
 253         if (conf_is_ht(&sc->hw->conf))
 254                 ath_debug_stat_11n_rc(sc, skb);
 255         else
 256                 ath_debug_stat_legacy_rc(sc, skb);
 257 }
 258
 259 /* FIXME: legacy rates, later on .. */
 260 void ath_debug_stat_retries(struct ath_softc *sc, int rix,
 261                             int xretries, int retries)
 262 {
 263         if (conf_is_ht(&sc->hw->conf)) {
 264                 int idx = sc->cur_rate_table->info[rix].dot11rate;
 265
 266                 sc->debug.stats.n_rcstats[idx].xretries += xretries;
 267                 sc->debug.stats.n_rcstats[idx].retries += retries;
 268         }
 269 }
 270
 271 static ssize_t ath_read_file_stat_11n_rc(struct file *file,
 272                                          char __user *user_buf,
 273                                          size_t count, loff_t *ppos)
 274 {
 275         struct ath_softc *sc = file->private_data;
 276         char buf[1024];
 277         unsigned int len = 0;
 278         int i = 0;
 279
 280         len += sprintf(buf, "%7s %13s %8s %8s\n\n", "Rate", "Success",
 281                        "Retries", "XRetries");
 282
 283         for (i = 0; i <= 15; i++) {
 284                 len += snprintf(buf + len, sizeof(buf) - len,
 285                                 "%5s%3d: %8u %8u %8u\n", "MCS", i,
 286                                 sc->debug.stats.n_rcstats[i].success,
 287                                 sc->debug.stats.n_rcstats[i].retries,
 288                                 sc->debug.stats.n_rcstats[i].xretries);
 289         }
 290
 291         return simple_read_from_buffer(user_buf, count, ppos, buf, len);
 292 }
 293
 294 static ssize_t ath_read_file_stat_legacy_rc(struct file *file,
 295                                             char __user *user_buf,
 296                                             size_t count, loff_t *ppos)
 297 {
 298         struct ath_softc *sc = file->private_data;
 299         char buf[512];
 300         unsigned int len = 0;
 301         int i = 0;
 302
 303         len += sprintf(buf, "%7s %13s\n\n", "Rate", "Success");
 304
 305         for (i = 0; i < sc->cur_rate_table->rate_cnt; i++) {
 306                 len += snprintf(buf + len, sizeof(buf) - len, "%5u: %12u\n",
 307                                 sc->cur_rate_table->info[i].ratekbps / 1000,
 308                                 sc->debug.stats.legacy_rcstats[i].success);
 309         }
 310
 311         return simple_read_from_buffer(user_buf, count, ppos, buf, len);
 312 }
 313
 314 static ssize_t read_file_rcstat(struct file *file, char __user *user_buf,
 315                                 size_t count, loff_t *ppos)
 316 {
 317         struct ath_softc *sc = file->private_data;
 318
 319         if (conf_is_ht(&sc->hw->conf))
 320                 return ath_read_file_stat_11n_rc(file, user_buf, count, ppos);
 321         else
 322                 return ath_read_file_stat_legacy_rc(file, user_buf, count ,ppos);
 323 }
 324
 325 static const struct file_operations fops_rcstat = {
 326         .read = read_file_rcstat,
 327         .open = ath9k_debugfs_open,
 328         .owner = THIS_MODULE
 329 };
 330
 331 int ath9k_init_debug(struct ath_softc *sc)
 332 {
 333         sc->debug.debug_mask = ath9k_debug;
 334
 335         sc->debug.debugfs_root = debugfs_create_dir(KBUILD_MODNAME, NULL);
 336         if (!sc->debug.debugfs_root)
 337                 goto err;
 338
 339         sc->debug.debugfs_phy = debugfs_create_dir(wiphy_name(sc->hw->wiphy),
 340                                                       sc->debug.debugfs_root);
 341         if (!sc->debug.debugfs_phy)
 342                 goto err;
 343
 344         sc->debug.debugfs_dma = debugfs_create_file("dma", S_IRUGO,
 345                                        sc->debug.debugfs_phy, sc, &fops_dma);
 346         if (!sc->debug.debugfs_dma)
 347                 goto err;
 348
 349         sc->debug.debugfs_interrupt = debugfs_create_file("interrupt",
 350                                                      S_IRUGO,
 351                                                      sc->debug.debugfs_phy,
 352                                                      sc, &fops_interrupt);
 353         if (!sc->debug.debugfs_interrupt)
 354                 goto err;
 355
 356         sc->debug.debugfs_rcstat = debugfs_create_file("rcstat",
 357                                                   S_IRUGO,
 358                                                   sc->debug.debugfs_phy,
 359                                                   sc, &fops_rcstat);
 360         if (!sc->debug.debugfs_rcstat)
 361                 goto err;
 362
 363         return 0;
 364 err:
 365         ath9k_exit_debug(sc);
 366         return -ENOMEM;
 367 }
 368
 369 void ath9k_exit_debug(struct ath_softc *sc)
 370 {
 371         debugfs_remove(sc->debug.debugfs_rcstat);
 372         debugfs_remove(sc->debug.debugfs_interrupt);
 373         debugfs_remove(sc->debug.debugfs_dma);
 374         debugfs_remove(sc->debug.debugfs_phy);
 375         debugfs_remove(sc->debug.debugfs_root);
 376 }