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

   1 /*
   2  * Copyright (c) 2008-2009 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 <asm/unaligned.h>
  18
  19 #include "ath9k.h"
  20
  21 static unsigned int ath9k_debug = DBG_DEFAULT;
  22 module_param_named(debug, ath9k_debug, uint, 0);
  23
  24 static struct dentry *ath9k_debugfs_root;
  25
  26 void DPRINTF(struct ath_softc *sc, int dbg_mask, const char *fmt, ...)
  27 {
  28         if (!sc)
  29                 return;
  30
  31         if (sc->debug.debug_mask & dbg_mask) {
  32                 va_list args;
  33
  34                 va_start(args, fmt);
  35                 printk(KERN_DEBUG "ath9k: ");
  36                 vprintk(fmt, args);
  37                 va_end(args);
  38         }
  39 }
  40
  41 static int ath9k_debugfs_open(struct inode *inode, struct file *file)
  42 {
  43         file->private_data = inode->i_private;
  44         return 0;
  45 }
  46
  47 static ssize_t read_file_dma(struct file *file, char __user *user_buf,
  48                              size_t count, loff_t *ppos)
  49 {
  50         struct ath_softc *sc = file->private_data;
  51         struct ath_hw *ah = sc->sc_ah;
  52         char buf[1024];
  53         unsigned int len = 0;
  54         u32 val[ATH9K_NUM_DMA_DEBUG_REGS];
  55         int i, qcuOffset = 0, dcuOffset = 0;
  56         u32 *qcuBase = &val[0], *dcuBase = &val[4];
  57
  58         REG_WRITE(ah, AR_MACMISC,
  59                   ((AR_MACMISC_DMA_OBS_LINE_8 << AR_MACMISC_DMA_OBS_S) |
  60                    (AR_MACMISC_MISC_OBS_BUS_1 <<
  61                     AR_MACMISC_MISC_OBS_BUS_MSB_S)));
  62
  63         len += snprintf(buf + len, sizeof(buf) - len,
  64                         "Raw DMA Debug values:\n");
  65
  66         for (i = 0; i < ATH9K_NUM_DMA_DEBUG_REGS; i++) {
  67                 if (i % 4 == 0)
  68                         len += snprintf(buf + len, sizeof(buf) - len, "\n");
  69
  70                 val[i] = REG_READ(ah, AR_DMADBG_0 + (i * sizeof(u32)));
  71                 len += snprintf(buf + len, sizeof(buf) - len, "%d: %08x ",
  72                                 i, val[i]);
  73         }
  74
  75         len += snprintf(buf + len, sizeof(buf) - len, "\n\n");
  76         len += snprintf(buf + len, sizeof(buf) - len,
  77                         "Num QCU: chain_st fsp_ok fsp_st DCU: chain_st\n");
  78
  79         for (i = 0; i < ATH9K_NUM_QUEUES; i++, qcuOffset += 4, dcuOffset += 5) {
  80                 if (i == 8) {
  81                         qcuOffset = 0;
  82                         qcuBase++;
  83                 }
  84
  85                 if (i == 6) {
  86                         dcuOffset = 0;
  87                         dcuBase++;
  88                 }
  89
  90                 len += snprintf(buf + len, sizeof(buf) - len,
  91                         "%2d          %2x      %1x     %2x           %2x\n",
  92                         i, (*qcuBase & (0x7 << qcuOffset)) >> qcuOffset,
  93                         (*qcuBase & (0x8 << qcuOffset)) >> (qcuOffset + 3),
  94                         val[2] & (0x7 << (i * 3)) >> (i * 3),
  95                         (*dcuBase & (0x1f << dcuOffset)) >> dcuOffset);
  96         }
  97
  98         len += snprintf(buf + len, sizeof(buf) - len, "\n");
  99
 100         len += snprintf(buf + len, sizeof(buf) - len,
 101                 "qcu_stitch state:   %2x    qcu_fetch state:        %2x\n",
 102                 (val[3] & 0x003c0000) >> 18, (val[3] & 0x03c00000) >> 22);
 103         len += snprintf(buf + len, sizeof(buf) - len,
 104                 "qcu_complete state: %2x    dcu_complete state:     %2x\n",
 105                 (val[3] & 0x1c000000) >> 26, (val[6] & 0x3));
 106         len += snprintf(buf + len, sizeof(buf) - len,
 107                 "dcu_arb state:      %2x    dcu_fp state:           %2x\n",
 108                 (val[5] & 0x06000000) >> 25, (val[5] & 0x38000000) >> 27);
 109         len += snprintf(buf + len, sizeof(buf) - len,
 110                 "chan_idle_dur:     %3d    chan_idle_dur_valid:     %1d\n",
 111                 (val[6] & 0x000003fc) >> 2, (val[6] & 0x00000400) >> 10);
 112         len += snprintf(buf + len, sizeof(buf) - len,
 113                 "txfifo_valid_0:      %1d    txfifo_valid_1:          %1d\n",
 114                 (val[6] & 0x00000800) >> 11, (val[6] & 0x00001000) >> 12);
 115         len += snprintf(buf + len, sizeof(buf) - len,
 116                 "txfifo_dcu_num_0:   %2d    txfifo_dcu_num_1:       %2d\n",
 117                 (val[6] & 0x0001e000) >> 13, (val[6] & 0x001e0000) >> 17);
 118
 119         len += snprintf(buf + len, sizeof(buf) - len, "pcu observe: 0x%x \n",
 120                         REG_READ(ah, AR_OBS_BUS_1));
 121         len += snprintf(buf + len, sizeof(buf) - len,
 122                         "AR_CR: 0x%x \n", REG_READ(ah, AR_CR));
 123
 124         return simple_read_from_buffer(user_buf, count, ppos, buf, len);
 125 }
 126
 127 static const struct file_operations fops_dma = {
 128         .read = read_file_dma,
 129         .open = ath9k_debugfs_open,
 130         .owner = THIS_MODULE
 131 };
 132
 133
 134 void ath_debug_stat_interrupt(struct ath_softc *sc, enum ath9k_int status)
 135 {
 136         if (status)
 137                 sc->debug.stats.istats.total++;
 138         if (status & ATH9K_INT_RX)
 139                 sc->debug.stats.istats.rxok++;
 140         if (status & ATH9K_INT_RXEOL)
 141                 sc->debug.stats.istats.rxeol++;
 142         if (status & ATH9K_INT_RXORN)
 143                 sc->debug.stats.istats.rxorn++;
 144         if (status & ATH9K_INT_TX)
 145                 sc->debug.stats.istats.txok++;
 146         if (status & ATH9K_INT_TXURN)
 147                 sc->debug.stats.istats.txurn++;
 148         if (status & ATH9K_INT_MIB)
 149                 sc->debug.stats.istats.mib++;
 150         if (status & ATH9K_INT_RXPHY)
 151                 sc->debug.stats.istats.rxphyerr++;
 152         if (status & ATH9K_INT_RXKCM)
 153                 sc->debug.stats.istats.rx_keycache_miss++;
 154         if (status & ATH9K_INT_SWBA)
 155                 sc->debug.stats.istats.swba++;
 156         if (status & ATH9K_INT_BMISS)
 157                 sc->debug.stats.istats.bmiss++;
 158         if (status & ATH9K_INT_BNR)
 159                 sc->debug.stats.istats.bnr++;
 160         if (status & ATH9K_INT_CST)
 161                 sc->debug.stats.istats.cst++;
 162         if (status & ATH9K_INT_GTT)
 163                 sc->debug.stats.istats.gtt++;
 164         if (status & ATH9K_INT_TIM)
 165                 sc->debug.stats.istats.tim++;
 166         if (status & ATH9K_INT_CABEND)
 167                 sc->debug.stats.istats.cabend++;
 168         if (status & ATH9K_INT_DTIMSYNC)
 169                 sc->debug.stats.istats.dtimsync++;
 170         if (status & ATH9K_INT_DTIM)
 171                 sc->debug.stats.istats.dtim++;
 172 }
 173
 174 static ssize_t read_file_interrupt(struct file *file, char __user *user_buf,
 175                                    size_t count, loff_t *ppos)
 176 {
 177         struct ath_softc *sc = file->private_data;
 178         char buf[512];
 179         unsigned int len = 0;
 180
 181         len += snprintf(buf + len, sizeof(buf) - len,
 182                 "%8s: %10u\n", "RX", sc->debug.stats.istats.rxok);
 183         len += snprintf(buf + len, sizeof(buf) - len,
 184                 "%8s: %10u\n", "RXEOL", sc->debug.stats.istats.rxeol);
 185         len += snprintf(buf + len, sizeof(buf) - len,
 186                 "%8s: %10u\n", "RXORN", sc->debug.stats.istats.rxorn);
 187         len += snprintf(buf + len, sizeof(buf) - len,
 188                 "%8s: %10u\n", "TX", sc->debug.stats.istats.txok);
 189         len += snprintf(buf + len, sizeof(buf) - len,
 190                 "%8s: %10u\n", "TXURN", sc->debug.stats.istats.txurn);
 191         len += snprintf(buf + len, sizeof(buf) - len,
 192                 "%8s: %10u\n", "MIB", sc->debug.stats.istats.mib);
 193         len += snprintf(buf + len, sizeof(buf) - len,
 194                 "%8s: %10u\n", "RXPHY", sc->debug.stats.istats.rxphyerr);
 195         len += snprintf(buf + len, sizeof(buf) - len,
 196                 "%8s: %10u\n", "RXKCM", sc->debug.stats.istats.rx_keycache_miss);
 197         len += snprintf(buf + len, sizeof(buf) - len,
 198                 "%8s: %10u\n", "SWBA", sc->debug.stats.istats.swba);
 199         len += snprintf(buf + len, sizeof(buf) - len,
 200                 "%8s: %10u\n", "BMISS", sc->debug.stats.istats.bmiss);
 201         len += snprintf(buf + len, sizeof(buf) - len,
 202                 "%8s: %10u\n", "BNR", sc->debug.stats.istats.bnr);
 203         len += snprintf(buf + len, sizeof(buf) - len,
 204                 "%8s: %10u\n", "CST", sc->debug.stats.istats.cst);
 205         len += snprintf(buf + len, sizeof(buf) - len,
 206                 "%8s: %10u\n", "GTT", sc->debug.stats.istats.gtt);
 207         len += snprintf(buf + len, sizeof(buf) - len,
 208                 "%8s: %10u\n", "TIM", sc->debug.stats.istats.tim);
 209         len += snprintf(buf + len, sizeof(buf) - len,
 210                 "%8s: %10u\n", "CABEND", sc->debug.stats.istats.cabend);
 211         len += snprintf(buf + len, sizeof(buf) - len,
 212                 "%8s: %10u\n", "DTIMSYNC", sc->debug.stats.istats.dtimsync);
 213         len += snprintf(buf + len, sizeof(buf) - len,
 214                 "%8s: %10u\n", "DTIM", sc->debug.stats.istats.dtim);
 215         len += snprintf(buf + len, sizeof(buf) - len,
 216                 "%8s: %10u\n", "TOTAL", sc->debug.stats.istats.total);
 217
 218         return simple_read_from_buffer(user_buf, count, ppos, buf, len);
 219 }
 220
 221 static const struct file_operations fops_interrupt = {
 222         .read = read_file_interrupt,
 223         .open = ath9k_debugfs_open,
 224         .owner = THIS_MODULE
 225 };
 226
 227 void ath_debug_stat_rc(struct ath_softc *sc, struct sk_buff *skb)
 228 {
 229         struct ath_tx_info_priv *tx_info_priv = NULL;
 230         struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
 231         struct ieee80211_tx_rate *rates = tx_info->status.rates;
 232         int final_ts_idx, idx;
 233         struct ath_rc_stats *stats;
 234
 235         tx_info_priv = ATH_TX_INFO_PRIV(tx_info);
 236         final_ts_idx = tx_info_priv->tx.ts_rateindex;
 237         idx = rates[final_ts_idx].idx;
 238         stats = &sc->debug.stats.rcstats[idx];
 239         stats->success++;
 240 }
 241
 242 void ath_debug_stat_retries(struct ath_softc *sc, int rix,
 243                             int xretries, int retries, u8 per)
 244 {
 245         struct ath_rc_stats *stats = &sc->debug.stats.rcstats[rix];
 246
 247         stats->xretries += xretries;
 248         stats->retries += retries;
 249         stats->per = per;
 250 }
 251
 252 static ssize_t read_file_rcstat(struct file *file, char __user *user_buf,
 253                                 size_t count, loff_t *ppos)
 254 {
 255         struct ath_softc *sc = file->private_data;
 256         char *buf;
 257         unsigned int len = 0, max;
 258         int i = 0;
 259         ssize_t retval;
 260
 261         if (sc->cur_rate_table == NULL)
 262                 return 0;
 263
 264         max = 80 + sc->cur_rate_table->rate_cnt * 64;
 265         buf = kmalloc(max + 1, GFP_KERNEL);
 266         if (buf == NULL)
 267                 return 0;
 268         buf[max] = 0;
 269
 270         len += sprintf(buf, "%5s %15s %8s %9s %3s\n\n", "Rate", "Success",
 271                        "Retries", "XRetries", "PER");
 272
 273         for (i = 0; i < sc->cur_rate_table->rate_cnt; i++) {
 274                 u32 ratekbps = sc->cur_rate_table->info[i].ratekbps;
 275                 struct ath_rc_stats *stats = &sc->debug.stats.rcstats[i];
 276
 277                 len += snprintf(buf + len, max - len,
 278                         "%3u.%d: %8u %8u %8u %8u\n", ratekbps / 1000,
 279                         (ratekbps % 1000) / 100, stats->success,
 280                         stats->retries, stats->xretries,
 281                         stats->per);
 282         }
 283
 284         retval = simple_read_from_buffer(user_buf, count, ppos, buf, len);
 285         kfree(buf);
 286         return retval;
 287 }
 288
 289 static const struct file_operations fops_rcstat = {
 290         .read = read_file_rcstat,
 291         .open = ath9k_debugfs_open,
 292         .owner = THIS_MODULE
 293 };
 294
 295 static const char * ath_wiphy_state_str(enum ath_wiphy_state state)
 296 {
 297         switch (state) {
 298         case ATH_WIPHY_INACTIVE:
 299                 return "INACTIVE";
 300         case ATH_WIPHY_ACTIVE:
 301                 return "ACTIVE";
 302         case ATH_WIPHY_PAUSING:
 303                 return "PAUSING";
 304         case ATH_WIPHY_PAUSED:
 305                 return "PAUSED";
 306         case ATH_WIPHY_SCAN:
 307                 return "SCAN";
 308         }
 309         return "?";
 310 }
 311
 312 static ssize_t read_file_wiphy(struct file *file, char __user *user_buf,
 313                                size_t count, loff_t *ppos)
 314 {
 315         struct ath_softc *sc = file->private_data;
 316         char buf[512];
 317         unsigned int len = 0;
 318         int i;
 319         u8 addr[ETH_ALEN];
 320
 321         len += snprintf(buf + len, sizeof(buf) - len,
 322                         "primary: %s (%s chan=%d ht=%d)\n",
 323                         wiphy_name(sc->pri_wiphy->hw->wiphy),
 324                         ath_wiphy_state_str(sc->pri_wiphy->state),
 325                         sc->pri_wiphy->chan_idx, sc->pri_wiphy->chan_is_ht);
 326         for (i = 0; i < sc->num_sec_wiphy; i++) {
 327                 struct ath_wiphy *aphy = sc->sec_wiphy[i];
 328                 if (aphy == NULL)
 329                         continue;
 330                 len += snprintf(buf + len, sizeof(buf) - len,
 331                                 "secondary: %s (%s chan=%d ht=%d)\n",
 332                                 wiphy_name(aphy->hw->wiphy),
 333                                 ath_wiphy_state_str(aphy->state),
 334                                 aphy->chan_idx, aphy->chan_is_ht);
 335         }
 336
 337         put_unaligned_le32(REG_READ(sc->sc_ah, AR_STA_ID0), addr);
 338         put_unaligned_le16(REG_READ(sc->sc_ah, AR_STA_ID1) & 0xffff, addr + 4);
 339         len += snprintf(buf + len, sizeof(buf) - len,
 340                         "addr: %pM\n", addr);
 341         put_unaligned_le32(REG_READ(sc->sc_ah, AR_BSSMSKL), addr);
 342         put_unaligned_le16(REG_READ(sc->sc_ah, AR_BSSMSKU) & 0xffff, addr + 4);
 343         len += snprintf(buf + len, sizeof(buf) - len,
 344                         "addrmask: %pM\n", addr);
 345
 346         return simple_read_from_buffer(user_buf, count, ppos, buf, len);
 347 }
 348
 349 static struct ath_wiphy * get_wiphy(struct ath_softc *sc, const char *name)
 350 {
 351         int i;
 352         if (strcmp(name, wiphy_name(sc->pri_wiphy->hw->wiphy)) == 0)
 353                 return sc->pri_wiphy;
 354         for (i = 0; i < sc->num_sec_wiphy; i++) {
 355                 struct ath_wiphy *aphy = sc->sec_wiphy[i];
 356                 if (aphy && strcmp(name, wiphy_name(aphy->hw->wiphy)) == 0)
 357                         return aphy;
 358         }
 359         return NULL;
 360 }
 361
 362 static int del_wiphy(struct ath_softc *sc, const char *name)
 363 {
 364         struct ath_wiphy *aphy = get_wiphy(sc, name);
 365         if (!aphy)
 366                 return -ENOENT;
 367         return ath9k_wiphy_del(aphy);
 368 }
 369
 370 static int pause_wiphy(struct ath_softc *sc, const char *name)
 371 {
 372         struct ath_wiphy *aphy = get_wiphy(sc, name);
 373         if (!aphy)
 374                 return -ENOENT;
 375         return ath9k_wiphy_pause(aphy);
 376 }
 377
 378 static int unpause_wiphy(struct ath_softc *sc, const char *name)
 379 {
 380         struct ath_wiphy *aphy = get_wiphy(sc, name);
 381         if (!aphy)
 382                 return -ENOENT;
 383         return ath9k_wiphy_unpause(aphy);
 384 }
 385
 386 static int select_wiphy(struct ath_softc *sc, const char *name)
 387 {
 388         struct ath_wiphy *aphy = get_wiphy(sc, name);
 389         if (!aphy)
 390                 return -ENOENT;
 391         return ath9k_wiphy_select(aphy);
 392 }
 393
 394 static int schedule_wiphy(struct ath_softc *sc, const char *msec)
 395 {
 396         ath9k_wiphy_set_scheduler(sc, simple_strtoul(msec, NULL, 0));
 397         return 0;
 398 }
 399
 400 static ssize_t write_file_wiphy(struct file *file, const char __user *user_buf,
 401                                 size_t count, loff_t *ppos)
 402 {
 403         struct ath_softc *sc = file->private_data;
 404         char buf[50];
 405         size_t len;
 406
 407         len = min(count, sizeof(buf) - 1);
 408         if (copy_from_user(buf, user_buf, len))
 409                 return -EFAULT;
 410         buf[len] = '\0';
 411         if (len > 0 && buf[len - 1] == '\n')
 412                 buf[len - 1] = '\0';
 413
 414         if (strncmp(buf, "add", 3) == 0) {
 415                 int res = ath9k_wiphy_add(sc);
 416                 if (res < 0)
 417                         return res;
 418         } else if (strncmp(buf, "del=", 4) == 0) {
 419                 int res = del_wiphy(sc, buf + 4);
 420                 if (res < 0)
 421                         return res;
 422         } else if (strncmp(buf, "pause=", 6) == 0) {
 423                 int res = pause_wiphy(sc, buf + 6);
 424                 if (res < 0)
 425                         return res;
 426         } else if (strncmp(buf, "unpause=", 8) == 0) {
 427                 int res = unpause_wiphy(sc, buf + 8);
 428                 if (res < 0)
 429                         return res;
 430         } else if (strncmp(buf, "select=", 7) == 0) {
 431                 int res = select_wiphy(sc, buf + 7);
 432                 if (res < 0)
 433                         return res;
 434         } else if (strncmp(buf, "schedule=", 9) == 0) {
 435                 int res = schedule_wiphy(sc, buf + 9);
 436                 if (res < 0)
 437                         return res;
 438         } else
 439                 return -EOPNOTSUPP;
 440
 441         return count;
 442 }
 443
 444 static const struct file_operations fops_wiphy = {
 445         .read = read_file_wiphy,
 446         .write = write_file_wiphy,
 447         .open = ath9k_debugfs_open,
 448         .owner = THIS_MODULE
 449 };
 450
 451
 452 int ath9k_init_debug(struct ath_softc *sc)
 453 {
 454         sc->debug.debug_mask = ath9k_debug;
 455
 456         if (!ath9k_debugfs_root)
 457                 return -ENOENT;
 458
 459         sc->debug.debugfs_phy = debugfs_create_dir(wiphy_name(sc->hw->wiphy),
 460                                                       ath9k_debugfs_root);
 461         if (!sc->debug.debugfs_phy)
 462                 goto err;
 463
 464         sc->debug.debugfs_dma = debugfs_create_file("dma", S_IRUGO,
 465                                        sc->debug.debugfs_phy, sc, &fops_dma);
 466         if (!sc->debug.debugfs_dma)
 467                 goto err;
 468
 469         sc->debug.debugfs_interrupt = debugfs_create_file("interrupt",
 470                                                      S_IRUGO,
 471                                                      sc->debug.debugfs_phy,
 472                                                      sc, &fops_interrupt);
 473         if (!sc->debug.debugfs_interrupt)
 474                 goto err;
 475
 476         sc->debug.debugfs_rcstat = debugfs_create_file("rcstat",
 477                                                   S_IRUGO,
 478                                                   sc->debug.debugfs_phy,
 479                                                   sc, &fops_rcstat);
 480         if (!sc->debug.debugfs_rcstat)
 481                 goto err;
 482
 483         sc->debug.debugfs_wiphy = debugfs_create_file(
 484                 "wiphy", S_IRUGO | S_IWUSR, sc->debug.debugfs_phy, sc,
 485                 &fops_wiphy);
 486         if (!sc->debug.debugfs_wiphy)
 487                 goto err;
 488
 489         return 0;
 490 err:
 491         ath9k_exit_debug(sc);
 492         return -ENOMEM;
 493 }
 494
 495 void ath9k_exit_debug(struct ath_softc *sc)
 496 {
 497         debugfs_remove(sc->debug.debugfs_wiphy);
 498         debugfs_remove(sc->debug.debugfs_rcstat);
 499         debugfs_remove(sc->debug.debugfs_interrupt);
 500         debugfs_remove(sc->debug.debugfs_dma);
 501         debugfs_remove(sc->debug.debugfs_phy);
 502 }
 503
 504 int ath9k_debug_create_root(void)
 505 {
 506         ath9k_debugfs_root = debugfs_create_dir(KBUILD_MODNAME, NULL);
 507         if (!ath9k_debugfs_root)
 508                 return -ENOENT;
 509
 510         return 0;
 511 }
 512
 513 void ath9k_debug_remove_root(void)
 514 {
 515         debugfs_remove(ath9k_debugfs_root);
 516         ath9k_debugfs_root = NULL;
 517 }