drivers/net/wireless/ath/carl9170/debug.c

   1 /*
   2  * Atheros CARL9170 driver
   3  *
   4  * debug(fs) probing
   5  *
   6  * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
   7  * Copyright 2009, 2010, Christian Lamparter <chunkeey@googlemail.com>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; see the file COPYING.  If not, see
  21  * http://www.gnu.org/licenses/.
  22  *
  23  * This file incorporates work covered by the following copyright and
  24  * permission notice:
  25  *    Copyright (c) 2008-2009 Atheros Communications, Inc.
  26  *
  27  *    Permission to use, copy, modify, and/or distribute this software for any
  28  *    purpose with or without fee is hereby granted, provided that the above
  29  *    copyright notice and this permission notice appear in all copies.
  30  *
  31  *    THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  32  *    WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  33  *    MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  34  *    ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  35  *    WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  36  *    ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  37  *    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  38  */
  39
  40 #include <linux/init.h>
  41 #include <linux/slab.h>
  42 #include <linux/module.h>
  43 #include <linux/seq_file.h>
  44 #include <linux/vmalloc.h>
  45 #include "carl9170.h"
  46 #include "cmd.h"
  47
  48 #define ADD(buf, off, max, fmt, args...)                                \
  49         off += snprintf(&buf[off], max - off, fmt, ##args);
  50
  51
  52 struct carl9170_debugfs_fops {
  53         unsigned int read_bufsize;
  54         umode_t attr;
  55         char *(*read)(struct ar9170 *ar, char *buf, size_t bufsize,
  56                       ssize_t *len);
  57         ssize_t (*write)(struct ar9170 *aru, const char *buf, size_t size);
  58         const struct file_operations fops;
  59
  60         enum carl9170_device_state req_dev_state;
  61 };
  62
  63 static ssize_t carl9170_debugfs_read(struct file *file, char __user *userbuf,
  64                                      size_t count, loff_t *ppos)
  65 {
  66         struct carl9170_debugfs_fops *dfops;
  67         struct ar9170 *ar;
  68         char *buf = NULL, *res_buf = NULL;
  69         ssize_t ret = 0;
  70         int err = 0;
  71
  72         if (!count)
  73                 return 0;
  74
  75         ar = file->private_data;
  76
  77         if (!ar)
  78                 return -ENODEV;
  79         dfops = container_of(file->f_op, struct carl9170_debugfs_fops, fops);
  80
  81         if (!dfops->read)
  82                 return -ENOSYS;
  83
  84         if (dfops->read_bufsize) {
  85                 buf = vmalloc(dfops->read_bufsize);
  86                 if (!buf)
  87                         return -ENOMEM;
  88         }
  89
  90         mutex_lock(&ar->mutex);
  91         if (!CHK_DEV_STATE(ar, dfops->req_dev_state)) {
  92                 err = -ENODEV;
  93                 res_buf = buf;
  94                 goto out_free;
  95         }
  96
  97         res_buf = dfops->read(ar, buf, dfops->read_bufsize, &ret);
  98
  99         if (ret > 0)
 100                 err = simple_read_from_buffer(userbuf, count, ppos,
 101                                               res_buf, ret);
 102         else
 103                 err = ret;
 104
 105         WARN_ON_ONCE(dfops->read_bufsize && (res_buf != buf));
 106
 107 out_free:
 108         vfree(res_buf);
 109         mutex_unlock(&ar->mutex);
 110         return err;
 111 }
 112
 113 static ssize_t carl9170_debugfs_write(struct file *file,
 114         const char __user *userbuf, size_t count, loff_t *ppos)
 115 {
 116         struct carl9170_debugfs_fops *dfops;
 117         struct ar9170 *ar;
 118         char *buf = NULL;
 119         int err = 0;
 120
 121         if (!count)
 122                 return 0;
 123
 124         if (count > PAGE_SIZE)
 125                 return -E2BIG;
 126
 127         ar = file->private_data;
 128
 129         if (!ar)
 130                 return -ENODEV;
 131         dfops = container_of(file->f_op, struct carl9170_debugfs_fops, fops);
 132
 133         if (!dfops->write)
 134                 return -ENOSYS;
 135
 136         buf = vmalloc(count);
 137         if (!buf)
 138                 return -ENOMEM;
 139
 140         if (copy_from_user(buf, userbuf, count)) {
 141                 err = -EFAULT;
 142                 goto out_free;
 143         }
 144
 145         if (mutex_trylock(&ar->mutex) == 0) {
 146                 err = -EAGAIN;
 147                 goto out_free;
 148         }
 149
 150         if (!CHK_DEV_STATE(ar, dfops->req_dev_state)) {
 151                 err = -ENODEV;
 152                 goto out_unlock;
 153         }
 154
 155         err = dfops->write(ar, buf, count);
 156         if (err)
 157                 goto out_unlock;
 158
 159 out_unlock:
 160         mutex_unlock(&ar->mutex);
 161
 162 out_free:
 163         vfree(buf);
 164         return err;
 165 }
 166
 167 #define __DEBUGFS_DECLARE_FILE(name, _read, _write, _read_bufsize,      \
 168                                _attr, _dstate)                          \
 169 static const struct carl9170_debugfs_fops carl_debugfs_##name ##_ops = {\
 170         .read_bufsize = _read_bufsize,                                  \
 171         .read = _read,                                                  \
 172         .write = _write,                                                \
 173         .attr = _attr,                                                  \
 174         .req_dev_state = _dstate,                                       \
 175         .fops = {                                                       \
 176                 .open   = simple_open,                                  \
 177                 .read   = carl9170_debugfs_read,                        \
 178                 .write  = carl9170_debugfs_write,                       \
 179                 .owner  = THIS_MODULE                                   \
 180         },                                                              \
 181 }
 182
 183 #define DEBUGFS_DECLARE_FILE(name, _read, _write, _read_bufsize, _attr) \
 184         __DEBUGFS_DECLARE_FILE(name, _read, _write, _read_bufsize,      \
 185                                _attr, CARL9170_STARTED)                 \
 186
 187 #define DEBUGFS_DECLARE_RO_FILE(name, _read_bufsize)                    \
 188         DEBUGFS_DECLARE_FILE(name, carl9170_debugfs_##name ##_read,     \
 189                              NULL, _read_bufsize, S_IRUSR)
 190
 191 #define DEBUGFS_DECLARE_WO_FILE(name)                                   \
 192         DEBUGFS_DECLARE_FILE(name, NULL, carl9170_debugfs_##name ##_write,\
 193                              0, S_IWUSR)
 194
 195 #define DEBUGFS_DECLARE_RW_FILE(name, _read_bufsize)                    \
 196         DEBUGFS_DECLARE_FILE(name, carl9170_debugfs_##name ##_read,     \
 197                              carl9170_debugfs_##name ##_write,          \
 198                              _read_bufsize, S_IRUSR | S_IWUSR)
 199
 200 #define __DEBUGFS_DECLARE_RW_FILE(name, _read_bufsize, _dstate)         \
 201         __DEBUGFS_DECLARE_FILE(name, carl9170_debugfs_##name ##_read,   \
 202                              carl9170_debugfs_##name ##_write,          \
 203                              _read_bufsize, S_IRUSR | S_IWUSR, _dstate)
 204
 205 #define DEBUGFS_READONLY_FILE(name, _read_bufsize, fmt, value...)       \
 206 static char *carl9170_debugfs_ ##name ## _read(struct ar9170 *ar,       \
 207                                              char *buf, size_t buf_size,\
 208                                              ssize_t *len)              \
 209 {                                                                       \
 210         ADD(buf, *len, buf_size, fmt "\n", ##value);                    \
 211         return buf;                                                     \
 212 }                                                                       \
 213 DEBUGFS_DECLARE_RO_FILE(name, _read_bufsize)
 214
 215 static char *carl9170_debugfs_mem_usage_read(struct ar9170 *ar, char *buf,
 216                                              size_t bufsize, ssize_t *len)
 217 {
 218         ADD(buf, *len, bufsize, "jar: [");
 219
 220         spin_lock_bh(&ar->mem_lock);
 221
 222         *len += bitmap_scnprintf(&buf[*len], bufsize - *len,
 223                                   ar->mem_bitmap, ar->fw.mem_blocks);
 224
 225         ADD(buf, *len, bufsize, "]\n");
 226
 227         ADD(buf, *len, bufsize, "cookies: used:%3d / total:%3d, allocs:%d\n",
 228             bitmap_weight(ar->mem_bitmap, ar->fw.mem_blocks),
 229             ar->fw.mem_blocks, atomic_read(&ar->mem_allocs));
 230
 231         ADD(buf, *len, bufsize, "memory: free:%3d (%3d KiB) / total:%3d KiB)\n",
 232             atomic_read(&ar->mem_free_blocks),
 233             (atomic_read(&ar->mem_free_blocks) * ar->fw.mem_block_size) / 1024,
 234             (ar->fw.mem_blocks * ar->fw.mem_block_size) / 1024);
 235
 236         spin_unlock_bh(&ar->mem_lock);
 237
 238         return buf;
 239 }
 240 DEBUGFS_DECLARE_RO_FILE(mem_usage, 512);
 241
 242 static char *carl9170_debugfs_qos_stat_read(struct ar9170 *ar, char *buf,
 243                                             size_t bufsize, ssize_t *len)
 244 {
 245         ADD(buf, *len, bufsize, "%s QoS AC\n", modparam_noht ? "Hardware" :
 246             "Software");
 247
 248         ADD(buf, *len, bufsize, "[     VO            VI       "
 249                                  "     BE            BK      ]\n");
 250
 251         spin_lock_bh(&ar->tx_stats_lock);
 252         ADD(buf, *len, bufsize, "[length/limit  length/limit  "
 253                                  "length/limit  length/limit ]\n"
 254                                 "[   %3d/%3d       %3d/%3d    "
 255                                  "   %3d/%3d       %3d/%3d   ]\n\n",
 256             ar->tx_stats[0].len, ar->tx_stats[0].limit,
 257             ar->tx_stats[1].len, ar->tx_stats[1].limit,
 258             ar->tx_stats[2].len, ar->tx_stats[2].limit,
 259             ar->tx_stats[3].len, ar->tx_stats[3].limit);
 260
 261         ADD(buf, *len, bufsize, "[    total         total     "
 262                                  "    total         total    ]\n"
 263                                 "[%10d    %10d    %10d    %10d   ]\n\n",
 264             ar->tx_stats[0].count, ar->tx_stats[1].count,
 265             ar->tx_stats[2].count, ar->tx_stats[3].count);
 266
 267         spin_unlock_bh(&ar->tx_stats_lock);
 268
 269         ADD(buf, *len, bufsize, "[  pend/waittx   pend/waittx "
 270                                  "  pend/waittx   pend/waittx]\n"
 271                                 "[   %3d/%3d       %3d/%3d    "
 272                                  "   %3d/%3d       %3d/%3d   ]\n\n",
 273             skb_queue_len(&ar->tx_pending[0]),
 274             skb_queue_len(&ar->tx_status[0]),
 275             skb_queue_len(&ar->tx_pending[1]),
 276             skb_queue_len(&ar->tx_status[1]),
 277             skb_queue_len(&ar->tx_pending[2]),
 278             skb_queue_len(&ar->tx_status[2]),
 279             skb_queue_len(&ar->tx_pending[3]),
 280             skb_queue_len(&ar->tx_status[3]));
 281
 282         return buf;
 283 }
 284 DEBUGFS_DECLARE_RO_FILE(qos_stat, 512);
 285
 286 static void carl9170_debugfs_format_frame(struct ar9170 *ar,
 287         struct sk_buff *skb, const char *prefix, char *buf,
 288         ssize_t *off, ssize_t bufsize)
 289 {
 290         struct _carl9170_tx_superframe *txc = (void *) skb->data;
 291         struct ieee80211_tx_info *txinfo = IEEE80211_SKB_CB(skb);
 292         struct carl9170_tx_info *arinfo = (void *) txinfo->rate_driver_data;
 293         struct ieee80211_hdr *hdr = (void *) txc->frame_data;
 294
 295         ADD(buf, *off, bufsize, "%s %p, c:%2x, DA:%pM, sq:%4d, mc:%.4x, "
 296             "pc:%.8x, to:%d ms\n", prefix, skb, txc->s.cookie,
 297             ieee80211_get_DA(hdr), get_seq_h(hdr),
 298             le16_to_cpu(txc->f.mac_control), le32_to_cpu(txc->f.phy_control),
 299             jiffies_to_msecs(jiffies - arinfo->timeout));
 300 }
 301
 302
 303 static char *carl9170_debugfs_ampdu_state_read(struct ar9170 *ar, char *buf,
 304                                                size_t bufsize, ssize_t *len)
 305 {
 306         struct carl9170_sta_tid *iter;
 307         struct sk_buff *skb;
 308         int cnt = 0, fc;
 309         int offset;
 310
 311         rcu_read_lock();
 312         list_for_each_entry_rcu(iter, &ar->tx_ampdu_list, list) {
 313
 314                 spin_lock_bh(&iter->lock);
 315                 ADD(buf, *len, bufsize, "Entry: #%2d TID:%1d, BSN:%4d, "
 316                     "SNX:%4d, HSN:%4d, BAW:%2d, state:%1d, toggles:%d\n",
 317                     cnt, iter->tid, iter->bsn, iter->snx, iter->hsn,
 318                     iter->max, iter->state, iter->counter);
 319
 320                 ADD(buf, *len, bufsize, "\tWindow:  [");
 321
 322                 *len += bitmap_scnprintf(&buf[*len], bufsize - *len,
 323                         iter->bitmap, CARL9170_BAW_BITS);
 324
 325 #define BM_STR_OFF(offset)                                      \
 326         ((CARL9170_BAW_BITS - (offset) - 1) / 4 +               \
 327          (CARL9170_BAW_BITS - (offset) - 1) / 32 + 1)
 328
 329                 ADD(buf, *len, bufsize, ",W]\n");
 330
 331                 offset = BM_STR_OFF(0);
 332                 ADD(buf, *len, bufsize, "\tBase Seq: %*s\n", offset, "T");
 333
 334                 offset = BM_STR_OFF(SEQ_DIFF(iter->snx, iter->bsn));
 335                 ADD(buf, *len, bufsize, "\tNext Seq: %*s\n", offset, "W");
 336
 337                 offset = BM_STR_OFF(((int)iter->hsn - (int)iter->bsn) %
 338                                      CARL9170_BAW_BITS);
 339                 ADD(buf, *len, bufsize, "\tLast Seq: %*s\n", offset, "N");
 340
 341                 ADD(buf, *len, bufsize, "\tPre-Aggregation reorder buffer: "
 342                     " currently queued:%d\n", skb_queue_len(&iter->queue));
 343
 344                 fc = 0;
 345                 skb_queue_walk(&iter->queue, skb) {
 346                         char prefix[32];
 347
 348                         snprintf(prefix, sizeof(prefix), "\t\t%3d :", fc);
 349                         carl9170_debugfs_format_frame(ar, skb, prefix, buf,
 350                                                       len, bufsize);
 351
 352                         fc++;
 353                 }
 354                 spin_unlock_bh(&iter->lock);
 355                 cnt++;
 356         }
 357         rcu_read_unlock();
 358
 359         return buf;
 360 }
 361 DEBUGFS_DECLARE_RO_FILE(ampdu_state, 8000);
 362
 363 static void carl9170_debugfs_queue_dump(struct ar9170 *ar, char *buf,
 364         ssize_t *len, size_t bufsize, struct sk_buff_head *queue)
 365 {
 366         struct sk_buff *skb;
 367         char prefix[16];
 368         int fc = 0;
 369
 370         spin_lock_bh(&queue->lock);
 371         skb_queue_walk(queue, skb) {
 372                 snprintf(prefix, sizeof(prefix), "%3d :", fc);
 373                 carl9170_debugfs_format_frame(ar, skb, prefix, buf,
 374                                               len, bufsize);
 375                 fc++;
 376         }
 377         spin_unlock_bh(&queue->lock);
 378 }
 379
 380 #define DEBUGFS_QUEUE_DUMP(q, qi)                                       \
 381 static char *carl9170_debugfs_##q ##_##qi ##_read(struct ar9170 *ar,    \
 382         char *buf, size_t bufsize, ssize_t *len)                        \
 383 {                                                                       \
 384         carl9170_debugfs_queue_dump(ar, buf, len, bufsize, &ar->q[qi]); \
 385         return buf;                                                     \
 386 }                                                                       \
 387 DEBUGFS_DECLARE_RO_FILE(q##_##qi, 8000);
 388
 389 static char *carl9170_debugfs_sta_psm_read(struct ar9170 *ar, char *buf,
 390                                            size_t bufsize, ssize_t *len)
 391 {
 392         ADD(buf, *len, bufsize, "psm state: %s\n", (ar->ps.off_override ?
 393             "FORCE CAM" : (ar->ps.state ? "PSM" : "CAM")));
 394
 395         ADD(buf, *len, bufsize, "sleep duration: %d ms.\n", ar->ps.sleep_ms);
 396         ADD(buf, *len, bufsize, "last power-state transition: %d ms ago.\n",
 397             jiffies_to_msecs(jiffies - ar->ps.last_action));
 398         ADD(buf, *len, bufsize, "last CAM->PSM transition: %d ms ago.\n",
 399             jiffies_to_msecs(jiffies - ar->ps.last_slept));
 400
 401         return buf;
 402 }
 403 DEBUGFS_DECLARE_RO_FILE(sta_psm, 160);
 404
 405 static char *carl9170_debugfs_tx_stuck_read(struct ar9170 *ar, char *buf,
 406                                             size_t bufsize, ssize_t *len)
 407 {
 408         int i;
 409
 410         for (i = 0; i < ar->hw->queues; i++) {
 411                 ADD(buf, *len, bufsize, "TX queue [%d]: %10d max:%10d ms.\n",
 412                     i, ieee80211_queue_stopped(ar->hw, i) ?
 413                     jiffies_to_msecs(jiffies - ar->queue_stop_timeout[i]) : 0,
 414                     jiffies_to_msecs(ar->max_queue_stop_timeout[i]));
 415
 416                 ar->max_queue_stop_timeout[i] = 0;
 417         }
 418
 419         return buf;
 420 }
 421 DEBUGFS_DECLARE_RO_FILE(tx_stuck, 180);
 422
 423 static char *carl9170_debugfs_phy_noise_read(struct ar9170 *ar, char *buf,
 424                                              size_t bufsize, ssize_t *len)
 425 {
 426         int err;
 427
 428         err = carl9170_get_noisefloor(ar);
 429         if (err) {
 430                 *len = err;
 431                 return buf;
 432         }
 433
 434         ADD(buf, *len, bufsize, "Chain 0: %10d dBm, ext. chan.:%10d dBm\n",
 435             ar->noise[0], ar->noise[2]);
 436         ADD(buf, *len, bufsize, "Chain 2: %10d dBm, ext. chan.:%10d dBm\n",
 437             ar->noise[1], ar->noise[3]);
 438
 439         return buf;
 440 }
 441 DEBUGFS_DECLARE_RO_FILE(phy_noise, 180);
 442
 443 static char *carl9170_debugfs_vif_dump_read(struct ar9170 *ar, char *buf,
 444                                             size_t bufsize, ssize_t *len)
 445 {
 446         struct carl9170_vif_info *iter;
 447         int i = 0;
 448
 449         ADD(buf, *len, bufsize, "registered VIFs:%d \\ %d\n",
 450             ar->vifs, ar->fw.vif_num);
 451
 452         ADD(buf, *len, bufsize, "VIF bitmap: [");
 453
 454         *len += bitmap_scnprintf(&buf[*len], bufsize - *len,
 455                                  &ar->vif_bitmap, ar->fw.vif_num);
 456
 457         ADD(buf, *len, bufsize, "]\n");
 458
 459         rcu_read_lock();
 460         list_for_each_entry_rcu(iter, &ar->vif_list, list) {
 461                 struct ieee80211_vif *vif = carl9170_get_vif(iter);
 462                 ADD(buf, *len, bufsize, "\t%d = [%s VIF, id:%d, type:%x "
 463                     " mac:%pM %s]\n", i, (carl9170_get_main_vif(ar) == vif ?
 464                     "Master" : " Slave"), iter->id, vif->type, vif->addr,
 465                     iter->enable_beacon ? "beaconing " : "");
 466                 i++;
 467         }
 468         rcu_read_unlock();
 469
 470         return buf;
 471 }
 472 DEBUGFS_DECLARE_RO_FILE(vif_dump, 8000);
 473
 474 #define UPDATE_COUNTER(ar, name)        ({                              \
 475         u32 __tmp[ARRAY_SIZE(name##_regs)];                             \
 476         unsigned int __i, __err = -ENODEV;                              \
 477                                                                         \
 478         for (__i = 0; __i < ARRAY_SIZE(name##_regs); __i++) {           \
 479                 __tmp[__i] = name##_regs[__i].reg;                      \
 480                 ar->debug.stats.name##_counter[__i] = 0;                \
 481         }                                                               \
 482                                                                         \
 483         if (IS_STARTED(ar))                                             \
 484                 __err = carl9170_read_mreg(ar, ARRAY_SIZE(name##_regs), \
 485                         __tmp, ar->debug.stats.name##_counter);         \
 486         (__err); })
 487
 488 #define TALLY_SUM_UP(ar, name)  do {                                    \
 489         unsigned int __i;                                               \
 490                                                                         \
 491         for (__i = 0; __i < ARRAY_SIZE(name##_regs); __i++) {           \
 492                 ar->debug.stats.name##_sum[__i] +=                      \
 493                         ar->debug.stats.name##_counter[__i];            \
 494         }                                                               \
 495 } while (0)
 496
 497 #define DEBUGFS_HW_TALLY_FILE(name, f)                                  \
 498 static char *carl9170_debugfs_##name ## _read(struct ar9170 *ar,        \
 499          char *dum, size_t bufsize, ssize_t *ret)                       \
 500 {                                                                       \
 501         char *buf;                                                      \
 502         int i, max_len, err;                                            \
 503                                                                         \
 504         max_len = ARRAY_SIZE(name##_regs) * 80;                         \
 505         buf = vmalloc(max_len);                                         \
 506         if (!buf)                                                       \
 507                 return NULL;                                            \
 508                                                                         \
 509         err = UPDATE_COUNTER(ar, name);                                 \
 510         if (err) {                                                      \
 511                 *ret = err;                                             \
 512                 return buf;                                             \
 513         }                                                               \
 514                                                                         \
 515         TALLY_SUM_UP(ar, name);                                         \
 516                                                                         \
 517         for (i = 0; i < ARRAY_SIZE(name##_regs); i++) {                 \
 518                 ADD(buf, *ret, max_len, "%22s = %" f "[+%" f "]\n",     \
 519                     name##_regs[i].nreg, ar->debug.stats.name ##_sum[i],\
 520                     ar->debug.stats.name ##_counter[i]);                \
 521         }                                                               \
 522                                                                         \
 523         return buf;                                                     \
 524 }                                                                       \
 525 DEBUGFS_DECLARE_RO_FILE(name, 0);
 526
 527 #define DEBUGFS_HW_REG_FILE(name, f)                                    \
 528 static char *carl9170_debugfs_##name ## _read(struct ar9170 *ar,        \
 529         char *dum, size_t bufsize, ssize_t *ret)                        \
 530 {                                                                       \
 531         char *buf;                                                      \
 532         int i, max_len, err;                                            \
 533                                                                         \
 534         max_len = ARRAY_SIZE(name##_regs) * 80;                         \
 535         buf = vmalloc(max_len);                                         \
 536         if (!buf)                                                       \
 537                 return NULL;                                            \
 538                                                                         \
 539         err = UPDATE_COUNTER(ar, name);                                 \
 540         if (err) {                                                      \
 541                 *ret = err;                                             \
 542                 return buf;                                             \
 543         }                                                               \
 544                                                                         \
 545         for (i = 0; i < ARRAY_SIZE(name##_regs); i++) {                 \
 546                 ADD(buf, *ret, max_len, "%22s = %" f "\n",              \
 547                     name##_regs[i].nreg,                                \
 548                     ar->debug.stats.name##_counter[i]);                 \
 549         }                                                               \
 550                                                                         \
 551         return buf;                                                     \
 552 }                                                                       \
 553 DEBUGFS_DECLARE_RO_FILE(name, 0);
 554
 555 static ssize_t carl9170_debugfs_hw_ioread32_write(struct ar9170 *ar,
 556         const char *buf, size_t count)
 557 {
 558         int err = 0, i, n = 0, max_len = 32, res;
 559         unsigned int reg, tmp;
 560
 561         if (!count)
 562                 return 0;
 563
 564         if (count > max_len)
 565                 return -E2BIG;
 566
 567         res = sscanf(buf, "0x%X %d", &reg, &n);
 568         if (res < 1) {
 569                 err = -EINVAL;
 570                 goto out;
 571         }
 572
 573         if (res == 1)
 574                 n = 1;
 575
 576         if (n > 15) {
 577                 err = -EMSGSIZE;
 578                 goto out;
 579         }
 580
 581         if ((reg >= 0x280000) || ((reg + (n << 2)) >= 0x280000)) {
 582                 err = -EADDRNOTAVAIL;
 583                 goto out;
 584         }
 585
 586         if (reg & 3) {
 587                 err = -EINVAL;
 588                 goto out;
 589         }
 590
 591         for (i = 0; i < n; i++) {
 592                 err = carl9170_read_reg(ar, reg + (i << 2), &tmp);
 593                 if (err)
 594                         goto out;
 595
 596                 ar->debug.ring[ar->debug.ring_tail].reg = reg + (i << 2);
 597                 ar->debug.ring[ar->debug.ring_tail].value = tmp;
 598                 ar->debug.ring_tail++;
 599                 ar->debug.ring_tail %= CARL9170_DEBUG_RING_SIZE;
 600         }
 601
 602 out:
 603         return err ? err : count;
 604 }
 605
 606 static char *carl9170_debugfs_hw_ioread32_read(struct ar9170 *ar, char *buf,
 607                                                size_t bufsize, ssize_t *ret)
 608 {
 609         int i = 0;
 610
 611         while (ar->debug.ring_head != ar->debug.ring_tail) {
 612                 ADD(buf, *ret, bufsize, "%.8x = %.8x\n",
 613                     ar->debug.ring[ar->debug.ring_head].reg,
 614                     ar->debug.ring[ar->debug.ring_head].value);
 615
 616                 ar->debug.ring_head++;
 617                 ar->debug.ring_head %= CARL9170_DEBUG_RING_SIZE;
 618
 619                 if (i++ == 64)
 620                         break;
 621         }
 622         ar->debug.ring_head = ar->debug.ring_tail;
 623         return buf;
 624 }
 625 DEBUGFS_DECLARE_RW_FILE(hw_ioread32, CARL9170_DEBUG_RING_SIZE * 40);
 626
 627 static ssize_t carl9170_debugfs_bug_write(struct ar9170 *ar, const char *buf,
 628                                           size_t count)
 629 {
 630         int err;
 631
 632         if (count < 1)
 633                 return -EINVAL;
 634
 635         switch (buf[0]) {
 636         case 'F':
 637                 ar->needs_full_reset = true;
 638                 break;
 639
 640         case 'R':
 641                 if (!IS_STARTED(ar)) {
 642                         err = -EAGAIN;
 643                         goto out;
 644                 }
 645
 646                 ar->needs_full_reset = false;
 647                 break;
 648
 649         case 'M':
 650                 err = carl9170_mac_reset(ar);
 651                 if (err < 0)
 652                         count = err;
 653
 654                 goto out;
 655
 656         case 'P':
 657                 err = carl9170_set_channel(ar, ar->hw->conf.channel,
 658                         ar->hw->conf.channel_type, CARL9170_RFI_COLD);
 659                 if (err < 0)
 660                         count = err;
 661
 662                 goto out;
 663
 664         default:
 665                 return -EINVAL;
 666         }
 667
 668         carl9170_restart(ar, CARL9170_RR_USER_REQUEST);
 669
 670 out:
 671         return count;
 672 }
 673
 674 static char *carl9170_debugfs_bug_read(struct ar9170 *ar, char *buf,
 675                                        size_t bufsize, ssize_t *ret)
 676 {
 677         ADD(buf, *ret, bufsize, "[P]hy reinit, [R]estart, [F]ull usb reset, "
 678             "[M]ac reset\n");
 679         ADD(buf, *ret, bufsize, "firmware restarts:%d, last reason:%d\n",
 680                 ar->restart_counter, ar->last_reason);
 681         ADD(buf, *ret, bufsize, "phy reinit errors:%d (%d)\n",
 682                 ar->total_chan_fail, ar->chan_fail);
 683         ADD(buf, *ret, bufsize, "reported firmware errors:%d\n",
 684                 ar->fw.err_counter);
 685         ADD(buf, *ret, bufsize, "reported firmware BUGs:%d\n",
 686                 ar->fw.bug_counter);
 687         ADD(buf, *ret, bufsize, "pending restart requests:%d\n",
 688                 atomic_read(&ar->pending_restarts));
 689         return buf;
 690 }
 691 __DEBUGFS_DECLARE_RW_FILE(bug, 400, CARL9170_STOPPED);
 692
 693 static const char *const erp_modes[] = {
 694         [CARL9170_ERP_INVALID] = "INVALID",
 695         [CARL9170_ERP_AUTO] = "Automatic",
 696         [CARL9170_ERP_MAC80211] = "Set by MAC80211",
 697         [CARL9170_ERP_OFF] = "Force Off",
 698         [CARL9170_ERP_RTS] = "Force RTS",
 699         [CARL9170_ERP_CTS] = "Force CTS"
 700 };
 701
 702 static char *carl9170_debugfs_erp_read(struct ar9170 *ar, char *buf,
 703                                        size_t bufsize, ssize_t *ret)
 704 {
 705         ADD(buf, *ret, bufsize, "ERP Setting: (%d) -> %s\n", ar->erp_mode,
 706             erp_modes[ar->erp_mode]);
 707         return buf;
 708 }
 709
 710 static ssize_t carl9170_debugfs_erp_write(struct ar9170 *ar, const char *buf,
 711                                           size_t count)
 712 {
 713         int res, val;
 714
 715         if (count < 1)
 716                 return -EINVAL;
 717
 718         res = sscanf(buf, "%d", &val);
 719         if (res != 1)
 720                 return -EINVAL;
 721
 722         if (!((val > CARL9170_ERP_INVALID) &&
 723               (val < __CARL9170_ERP_NUM)))
 724                 return -EINVAL;
 725
 726         ar->erp_mode = val;
 727         return count;
 728 }
 729
 730 DEBUGFS_DECLARE_RW_FILE(erp, 80);
 731
 732 static ssize_t carl9170_debugfs_hw_iowrite32_write(struct ar9170 *ar,
 733         const char *buf, size_t count)
 734 {
 735         int err = 0, max_len = 22, res;
 736         u32 reg, val;
 737
 738         if (!count)
 739                 return 0;
 740
 741         if (count > max_len)
 742                 return -E2BIG;
 743
 744         res = sscanf(buf, "0x%X 0x%X", &reg, &val);
 745         if (res != 2) {
 746                 err = -EINVAL;
 747                 goto out;
 748         }
 749
 750         if (reg <= 0x100000 || reg >= 0x280000) {
 751                 err = -EADDRNOTAVAIL;
 752                 goto out;
 753         }
 754
 755         if (reg & 3) {
 756                 err = -EINVAL;
 757                 goto out;
 758         }
 759
 760         err = carl9170_write_reg(ar, reg, val);
 761         if (err)
 762                 goto out;
 763
 764 out:
 765         return err ? err : count;
 766 }
 767 DEBUGFS_DECLARE_WO_FILE(hw_iowrite32);
 768
 769 DEBUGFS_HW_TALLY_FILE(hw_tx_tally, "u");
 770 DEBUGFS_HW_TALLY_FILE(hw_rx_tally, "u");
 771 DEBUGFS_HW_TALLY_FILE(hw_phy_errors, "u");
 772 DEBUGFS_HW_REG_FILE(hw_wlan_queue, ".8x");
 773 DEBUGFS_HW_REG_FILE(hw_pta_queue, ".8x");
 774 DEBUGFS_HW_REG_FILE(hw_ampdu_info, ".8x");
 775 DEBUGFS_QUEUE_DUMP(tx_status, 0);
 776 DEBUGFS_QUEUE_DUMP(tx_status, 1);
 777 DEBUGFS_QUEUE_DUMP(tx_status, 2);
 778 DEBUGFS_QUEUE_DUMP(tx_status, 3);
 779 DEBUGFS_QUEUE_DUMP(tx_pending, 0);
 780 DEBUGFS_QUEUE_DUMP(tx_pending, 1);
 781 DEBUGFS_QUEUE_DUMP(tx_pending, 2);
 782 DEBUGFS_QUEUE_DUMP(tx_pending, 3);
 783 DEBUGFS_READONLY_FILE(usb_tx_anch_urbs, 20, "%d",
 784                       atomic_read(&ar->tx_anch_urbs));
 785 DEBUGFS_READONLY_FILE(usb_rx_anch_urbs, 20, "%d",
 786                       atomic_read(&ar->rx_anch_urbs));
 787 DEBUGFS_READONLY_FILE(usb_rx_work_urbs, 20, "%d",
 788                       atomic_read(&ar->rx_work_urbs));
 789 DEBUGFS_READONLY_FILE(usb_rx_pool_urbs, 20, "%d",
 790                       atomic_read(&ar->rx_pool_urbs));
 791
 792 DEBUGFS_READONLY_FILE(tx_total_queued, 20, "%d",
 793                       atomic_read(&ar->tx_total_queued));
 794 DEBUGFS_READONLY_FILE(tx_ampdu_scheduler, 20, "%d",
 795                       atomic_read(&ar->tx_ampdu_scheduler));
 796
 797 DEBUGFS_READONLY_FILE(tx_total_pending, 20, "%d",
 798                       atomic_read(&ar->tx_total_pending));
 799
 800 DEBUGFS_READONLY_FILE(tx_ampdu_list_len, 20, "%d",
 801                       ar->tx_ampdu_list_len);
 802
 803 DEBUGFS_READONLY_FILE(tx_ampdu_upload, 20, "%d",
 804                       atomic_read(&ar->tx_ampdu_upload));
 805
 806 DEBUGFS_READONLY_FILE(tx_janitor_last_run, 64, "last run:%d ms ago",
 807         jiffies_to_msecs(jiffies - ar->tx_janitor_last_run));
 808
 809 DEBUGFS_READONLY_FILE(tx_dropped, 20, "%d", ar->tx_dropped);
 810
 811 DEBUGFS_READONLY_FILE(rx_dropped, 20, "%d", ar->rx_dropped);
 812
 813 DEBUGFS_READONLY_FILE(sniffer_enabled, 20, "%d", ar->sniffer_enabled);
 814 DEBUGFS_READONLY_FILE(rx_software_decryption, 20, "%d",
 815                       ar->rx_software_decryption);
 816 DEBUGFS_READONLY_FILE(ampdu_factor, 20, "%d",
 817                       ar->current_factor);
 818 DEBUGFS_READONLY_FILE(ampdu_density, 20, "%d",
 819                       ar->current_density);
 820
 821 DEBUGFS_READONLY_FILE(beacon_int, 20, "%d TU", ar->global_beacon_int);
 822 DEBUGFS_READONLY_FILE(pretbtt, 20, "%d TU", ar->global_pretbtt);
 823
 824 void carl9170_debugfs_register(struct ar9170 *ar)
 825 {
 826         ar->debug_dir = debugfs_create_dir(KBUILD_MODNAME,
 827                 ar->hw->wiphy->debugfsdir);
 828
 829 #define DEBUGFS_ADD(name)                                               \
 830         debugfs_create_file(#name, carl_debugfs_##name ##_ops.attr,     \
 831                             ar->debug_dir, ar,                          \
 832                             &carl_debugfs_##name ## _ops.fops);
 833
 834         DEBUGFS_ADD(usb_tx_anch_urbs);
 835         DEBUGFS_ADD(usb_rx_pool_urbs);
 836         DEBUGFS_ADD(usb_rx_anch_urbs);
 837         DEBUGFS_ADD(usb_rx_work_urbs);
 838
 839         DEBUGFS_ADD(tx_total_queued);
 840         DEBUGFS_ADD(tx_total_pending);
 841         DEBUGFS_ADD(tx_dropped);
 842         DEBUGFS_ADD(tx_stuck);
 843         DEBUGFS_ADD(tx_ampdu_upload);
 844         DEBUGFS_ADD(tx_ampdu_scheduler);
 845         DEBUGFS_ADD(tx_ampdu_list_len);
 846
 847         DEBUGFS_ADD(rx_dropped);
 848         DEBUGFS_ADD(sniffer_enabled);
 849         DEBUGFS_ADD(rx_software_decryption);
 850
 851         DEBUGFS_ADD(mem_usage);
 852         DEBUGFS_ADD(qos_stat);
 853         DEBUGFS_ADD(sta_psm);
 854         DEBUGFS_ADD(ampdu_state);
 855
 856         DEBUGFS_ADD(hw_tx_tally);
 857         DEBUGFS_ADD(hw_rx_tally);
 858         DEBUGFS_ADD(hw_phy_errors);
 859         DEBUGFS_ADD(phy_noise);
 860
 861         DEBUGFS_ADD(hw_wlan_queue);
 862         DEBUGFS_ADD(hw_pta_queue);
 863         DEBUGFS_ADD(hw_ampdu_info);
 864
 865         DEBUGFS_ADD(ampdu_density);
 866         DEBUGFS_ADD(ampdu_factor);
 867
 868         DEBUGFS_ADD(tx_janitor_last_run);
 869
 870         DEBUGFS_ADD(tx_status_0);
 871         DEBUGFS_ADD(tx_status_1);
 872         DEBUGFS_ADD(tx_status_2);
 873         DEBUGFS_ADD(tx_status_3);
 874
 875         DEBUGFS_ADD(tx_pending_0);
 876         DEBUGFS_ADD(tx_pending_1);
 877         DEBUGFS_ADD(tx_pending_2);
 878         DEBUGFS_ADD(tx_pending_3);
 879
 880         DEBUGFS_ADD(hw_ioread32);
 881         DEBUGFS_ADD(hw_iowrite32);
 882         DEBUGFS_ADD(bug);
 883
 884         DEBUGFS_ADD(erp);
 885
 886         DEBUGFS_ADD(vif_dump);
 887
 888         DEBUGFS_ADD(beacon_int);
 889         DEBUGFS_ADD(pretbtt);
 890
 891 #undef DEBUGFS_ADD
 892 }
 893
 894 void carl9170_debugfs_unregister(struct ar9170 *ar)
 895 {
 896         debugfs_remove_recursive(ar->debug_dir);
 897 }