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 static int carl9170_debugfs_open(struct inode *inode, struct file *file)
  52 {
  53         file->private_data = inode->i_private;
  54         return 0;
  55 }
  56
  57 struct carl9170_debugfs_fops {
  58         unsigned int read_bufsize;
  59         umode_t attr;
  60         char *(*read)(struct ar9170 *ar, char *buf, size_t bufsize,
  61                       ssize_t *len);
  62         ssize_t (*write)(struct ar9170 *aru, const char *buf, size_t size);
  63         const struct file_operations fops;
  64
  65         enum carl9170_device_state req_dev_state;
  66 };
  67
  68 static ssize_t carl9170_debugfs_read(struct file *file, char __user *userbuf,
  69                                      size_t count, loff_t *ppos)
  70 {
  71         struct carl9170_debugfs_fops *dfops;
  72         struct ar9170 *ar;
  73         char *buf = NULL, *res_buf = NULL;
  74         ssize_t ret = 0;
  75         int err = 0;
  76
  77         if (!count)
  78                 return 0;
  79
  80         ar = file->private_data;
  81
  82         if (!ar)
  83                 return -ENODEV;
  84         dfops = container_of(file->f_op, struct carl9170_debugfs_fops, fops);
  85
  86         if (!dfops->read)
  87                 return -ENOSYS;
  88
  89         if (dfops->read_bufsize) {
  90                 buf = vmalloc(dfops->read_bufsize);
  91                 if (!buf)
  92                         return -ENOMEM;
  93         }
  94
  95         mutex_lock(&ar->mutex);
  96         if (!CHK_DEV_STATE(ar, dfops->req_dev_state)) {
  97                 err = -ENODEV;
  98                 res_buf = buf;
  99                 goto out_free;
 100         }
 101
 102         res_buf = dfops->read(ar, buf, dfops->read_bufsize, &ret);
 103
 104         if (ret > 0)
 105                 err = simple_read_from_buffer(userbuf, count, ppos,
 106                                               res_buf, ret);
 107         else
 108                 err = ret;
 109
 110         WARN_ON_ONCE(dfops->read_bufsize && (res_buf != buf));
 111
 112 out_free:
 113         vfree(res_buf);
 114         mutex_unlock(&ar->mutex);
 115         return err;
 116 }
 117
 118 static ssize_t carl9170_debugfs_write(struct file *file,
 119         const char __user *userbuf, size_t count, loff_t *ppos)
 120 {
 121         struct carl9170_debugfs_fops *dfops;
 122         struct ar9170 *ar;
 123         char *buf = NULL;
 124         int err = 0;
 125
 126         if (!count)
 127                 return 0;
 128
 129         if (count > PAGE_SIZE)
 130                 return -E2BIG;
 131
 132         ar = file->private_data;
 133
 134         if (!ar)
 135                 return -ENODEV;
 136         dfops = container_of(file->f_op, struct carl9170_debugfs_fops, fops);
 137
 138         if (!dfops->write)
 139                 return -ENOSYS;
 140
 141         buf = vmalloc(count);
 142         if (!buf)
 143                 return -ENOMEM;
 144
 145         if (copy_from_user(buf, userbuf, count)) {
 146                 err = -EFAULT;
 147                 goto out_free;
 148         }
 149
 150         if (mutex_trylock(&ar->mutex) == 0) {
 151                 err = -EAGAIN;
 152                 goto out_free;
 153         }
 154
 155         if (!CHK_DEV_STATE(ar, dfops->req_dev_state)) {
 156                 err = -ENODEV;
 157                 goto out_unlock;
 158         }
 159
 160         err = dfops->write(ar, buf, count);
 161         if (err)
 162                 goto out_unlock;
 163
 164 out_unlock:
 165         mutex_unlock(&ar->mutex);
 166
 167 out_free:
 168         vfree(buf);
 169         return err;
 170 }
 171
 172 #define __DEBUGFS_DECLARE_FILE(name, _read, _write, _read_bufsize,      \
 173                                _attr, _dstate)                          \
 174 static const struct carl9170_debugfs_fops carl_debugfs_##name ##_ops = {\
 175         .read_bufsize = _read_bufsize,                                  \
 176         .read = _read,                                                  \
 177         .write = _write,                                                \
 178         .attr = _attr,                                                  \
 179         .req_dev_state = _dstate,                                       \
 180         .fops = {                                                       \
 181                 .open   = carl9170_debugfs_open,                        \
 182                 .read   = carl9170_debugfs_read,                        \
 183                 .write  = carl9170_debugfs_write,                       \
 184                 .owner  = THIS_MODULE                                   \
 185         },                                                              \
 186 }
 187
 188 #define DEBUGFS_DECLARE_FILE(name, _read, _write, _read_bufsize, _attr) \
 189         __DEBUGFS_DECLARE_FILE(name, _read, _write, _read_bufsize,      \
 190                                _attr, CARL9170_STARTED)                 \
 191
 192 #define DEBUGFS_DECLARE_RO_FILE(name, _read_bufsize)                    \
 193         DEBUGFS_DECLARE_FILE(name, carl9170_debugfs_##name ##_read,     \
 194                              NULL, _read_bufsize, S_IRUSR)
 195
 196 #define DEBUGFS_DECLARE_WO_FILE(name)                                   \
 197         DEBUGFS_DECLARE_FILE(name, NULL, carl9170_debugfs_##name ##_write,\
 198                              0, S_IWUSR)
 199
 200 #define DEBUGFS_DECLARE_RW_FILE(name, _read_bufsize)                    \
 201         DEBUGFS_DECLARE_FILE(name, carl9170_debugfs_##name ##_read,     \
 202                              carl9170_debugfs_##name ##_write,          \
 203                              _read_bufsize, S_IRUSR | S_IWUSR)
 204
 205 #define __DEBUGFS_DECLARE_RW_FILE(name, _read_bufsize, _dstate)         \
 206         __DEBUGFS_DECLARE_FILE(name, carl9170_debugfs_##name ##_read,   \
 207                              carl9170_debugfs_##name ##_write,          \
 208                              _read_bufsize, S_IRUSR | S_IWUSR, _dstate)
 209
 210 #define DEBUGFS_READONLY_FILE(name, _read_bufsize, fmt, value...)       \
 211 static char *carl9170_debugfs_ ##name ## _read(struct ar9170 *ar,       \
 212                                              char *buf, size_t buf_size,\
 213                                              ssize_t *len)              \
 214 {                                                                       \
 215         ADD(buf, *len, buf_size, fmt "\n", ##value);                    \
 216         return buf;                                                     \
 217 }                                                                       \
 218 DEBUGFS_DECLARE_RO_FILE(name, _read_bufsize)
 219
 220 static char *carl9170_debugfs_mem_usage_read(struct ar9170 *ar, char *buf,
 221                                              size_t bufsize, ssize_t *len)
 222 {
 223         ADD(buf, *len, bufsize, "jar: [");
 224
 225         spin_lock_bh(&ar->mem_lock);
 226
 227         *len += bitmap_scnprintf(&buf[*len], bufsize - *len,
 228                                   ar->mem_bitmap, ar->fw.mem_blocks);
 229
 230         ADD(buf, *len, bufsize, "]\n");
 231
 232         ADD(buf, *len, bufsize, "cookies: used:%3d / total:%3d, allocs:%d\n",
 233             bitmap_weight(ar->mem_bitmap, ar->fw.mem_blocks),
 234             ar->fw.mem_blocks, atomic_read(&ar->mem_allocs));
 235
 236         ADD(buf, *len, bufsize, "memory: free:%3d (%3d KiB) / total:%3d KiB)\n",
 237             atomic_read(&ar->mem_free_blocks),
 238             (atomic_read(&ar->mem_free_blocks) * ar->fw.mem_block_size) / 1024,
 239             (ar->fw.mem_blocks * ar->fw.mem_block_size) / 1024);
 240
 241         spin_unlock_bh(&ar->mem_lock);
 242
 243         return buf;
 244 }
 245 DEBUGFS_DECLARE_RO_FILE(mem_usage, 512);
 246
 247 static char *carl9170_debugfs_qos_stat_read(struct ar9170 *ar, char *buf,
 248                                             size_t bufsize, ssize_t *len)
 249 {
 250         ADD(buf, *len, bufsize, "%s QoS AC\n", modparam_noht ? "Hardware" :
 251             "Software");
 252
 253         ADD(buf, *len, bufsize, "[     VO            VI       "
 254                                  "     BE            BK      ]\n");
 255
 256         spin_lock_bh(&ar->tx_stats_lock);
 257         ADD(buf, *len, bufsize, "[length/limit  length/limit  "
 258                                  "length/limit  length/limit ]\n"
 259                                 "[   %3d/%3d       %3d/%3d    "
 260                                  "   %3d/%3d       %3d/%3d   ]\n\n",
 261             ar->tx_stats[0].len, ar->tx_stats[0].limit,
 262             ar->tx_stats[1].len, ar->tx_stats[1].limit,
 263             ar->tx_stats[2].len, ar->tx_stats[2].limit,
 264             ar->tx_stats[3].len, ar->tx_stats[3].limit);
 265
 266         ADD(buf, *len, bufsize, "[    total         total     "
 267                                  "    total         total    ]\n"
 268                                 "[%10d    %10d    %10d    %10d   ]\n\n",
 269             ar->tx_stats[0].count, ar->tx_stats[1].count,
 270             ar->tx_stats[2].count, ar->tx_stats[3].count);
 271
 272         spin_unlock_bh(&ar->tx_stats_lock);
 273
 274         ADD(buf, *len, bufsize, "[  pend/waittx   pend/waittx "
 275                                  "  pend/waittx   pend/waittx]\n"
 276                                 "[   %3d/%3d       %3d/%3d    "
 277                                  "   %3d/%3d       %3d/%3d   ]\n\n",
 278             skb_queue_len(&ar->tx_pending[0]),
 279             skb_queue_len(&ar->tx_status[0]),
 280             skb_queue_len(&ar->tx_pending[1]),
 281             skb_queue_len(&ar->tx_status[1]),
 282             skb_queue_len(&ar->tx_pending[2]),
 283             skb_queue_len(&ar->tx_status[2]),
 284             skb_queue_len(&ar->tx_pending[3]),
 285             skb_queue_len(&ar->tx_status[3]));
 286
 287         return buf;
 288 }
 289 DEBUGFS_DECLARE_RO_FILE(qos_stat, 512);
 290
 291 static void carl9170_debugfs_format_frame(struct ar9170 *ar,
 292         struct sk_buff *skb, const char *prefix, char *buf,
 293         ssize_t *off, ssize_t bufsize)
 294 {
 295         struct _carl9170_tx_superframe *txc = (void *) skb->data;
 296         struct ieee80211_tx_info *txinfo = IEEE80211_SKB_CB(skb);
 297         struct carl9170_tx_info *arinfo = (void *) txinfo->rate_driver_data;
 298         struct ieee80211_hdr *hdr = (void *) txc->frame_data;
 299
 300         ADD(buf, *off, bufsize, "%s %p, c:%2x, DA:%pM, sq:%4d, mc:%.4x, "
 301             "pc:%.8x, to:%d ms\n", prefix, skb, txc->s.cookie,
 302             ieee80211_get_DA(hdr), get_seq_h(hdr),
 303             le16_to_cpu(txc->f.mac_control), le32_to_cpu(txc->f.phy_control),
 304             jiffies_to_msecs(jiffies - arinfo->timeout));
 305 }
 306
 307
 308 static char *carl9170_debugfs_ampdu_state_read(struct ar9170 *ar, char *buf,
 309                                                size_t bufsize, ssize_t *len)
 310 {
 311         struct carl9170_sta_tid *iter;
 312         struct sk_buff *skb;
 313         int cnt = 0, fc;
 314         int offset;
 315
 316         rcu_read_lock();
 317         list_for_each_entry_rcu(iter, &ar->tx_ampdu_list, list) {
 318
 319                 spin_lock_bh(&iter->lock);
 320                 ADD(buf, *len, bufsize, "Entry: #%2d TID:%1d, BSN:%4d, "
 321                     "SNX:%4d, HSN:%4d, BAW:%2d, state:%1d, toggles:%d\n",
 322                     cnt, iter->tid, iter->bsn, iter->snx, iter->hsn,
 323                     iter->max, iter->state, iter->counter);
 324
 325                 ADD(buf, *len, bufsize, "\tWindow:  [");
 326
 327                 *len += bitmap_scnprintf(&buf[*len], bufsize - *len,
 328                         iter->bitmap, CARL9170_BAW_BITS);
 329
 330 #define BM_STR_OFF(offset)                                      \
 331         ((CARL9170_BAW_BITS - (offset) - 1) / 4 +               \
 332          (CARL9170_BAW_BITS - (offset) - 1) / 32 + 1)
 333
 334                 ADD(buf, *len, bufsize, ",W]\n");
 335
 336                 offset = BM_STR_OFF(0);
 337                 ADD(buf, *len, bufsize, "\tBase Seq: %*s\n", offset, "T");
 338
 339                 offset = BM_STR_OFF(SEQ_DIFF(iter->snx, iter->bsn));
 340                 ADD(buf, *len, bufsize, "\tNext Seq: %*s\n", offset, "W");
 341
 342                 offset = BM_STR_OFF(((int)iter->hsn - (int)iter->bsn) %
 343                                      CARL9170_BAW_BITS);
 344                 ADD(buf, *len, bufsize, "\tLast Seq: %*s\n", offset, "N");
 345
 346                 ADD(buf, *len, bufsize, "\tPre-Aggregation reorder buffer: "
 347                     " currently queued:%d\n", skb_queue_len(&iter->queue));
 348
 349                 fc = 0;
 350                 skb_queue_walk(&iter->queue, skb) {
 351                         char prefix[32];
 352
 353                         snprintf(prefix, sizeof(prefix), "\t\t%3d :", fc);
 354                         carl9170_debugfs_format_frame(ar, skb, prefix, buf,
 355                                                       len, bufsize);
 356
 357                         fc++;
 358                 }
 359                 spin_unlock_bh(&iter->lock);
 360                 cnt++;
 361         }
 362         rcu_read_unlock();
 363
 364         return buf;
 365 }
 366 DEBUGFS_DECLARE_RO_FILE(ampdu_state, 8000);
 367
 368 static void carl9170_debugfs_queue_dump(struct ar9170 *ar, char *buf,
 369         ssize_t *len, size_t bufsize, struct sk_buff_head *queue)
 370 {
 371         struct sk_buff *skb;
 372         char prefix[16];
 373         int fc = 0;
 374
 375         spin_lock_bh(&queue->lock);
 376         skb_queue_walk(queue, skb) {
 377                 snprintf(prefix, sizeof(prefix), "%3d :", fc);
 378                 carl9170_debugfs_format_frame(ar, skb, prefix, buf,
 379                                               len, bufsize);
 380                 fc++;
 381         }
 382         spin_unlock_bh(&queue->lock);
 383 }
 384
 385 #define DEBUGFS_QUEUE_DUMP(q, qi)                                       \
 386 static char *carl9170_debugfs_##q ##_##qi ##_read(struct ar9170 *ar,    \
 387         char *buf, size_t bufsize, ssize_t *len)                        \
 388 {                                                                       \
 389         carl9170_debugfs_queue_dump(ar, buf, len, bufsize, &ar->q[qi]); \
 390         return buf;                                                     \
 391 }                                                                       \
 392 DEBUGFS_DECLARE_RO_FILE(q##_##qi, 8000);
 393
 394 static char *carl9170_debugfs_sta_psm_read(struct ar9170 *ar, char *buf,
 395                                            size_t bufsize, ssize_t *len)
 396 {
 397         ADD(buf, *len, bufsize, "psm state: %s\n", (ar->ps.off_override ?
 398             "FORCE CAM" : (ar->ps.state ? "PSM" : "CAM")));
 399
 400         ADD(buf, *len, bufsize, "sleep duration: %d ms.\n", ar->ps.sleep_ms);
 401         ADD(buf, *len, bufsize, "last power-state transition: %d ms ago.\n",
 402             jiffies_to_msecs(jiffies - ar->ps.last_action));
 403         ADD(buf, *len, bufsize, "last CAM->PSM transition: %d ms ago.\n",
 404             jiffies_to_msecs(jiffies - ar->ps.last_slept));
 405
 406         return buf;
 407 }
 408 DEBUGFS_DECLARE_RO_FILE(sta_psm, 160);
 409
 410 static char *carl9170_debugfs_tx_stuck_read(struct ar9170 *ar, char *buf,
 411                                             size_t bufsize, ssize_t *len)
 412 {
 413         int i;
 414
 415         for (i = 0; i < ar->hw->queues; i++) {
 416                 ADD(buf, *len, bufsize, "TX queue [%d]: %10d max:%10d ms.\n",
 417                     i, ieee80211_queue_stopped(ar->hw, i) ?
 418                     jiffies_to_msecs(jiffies - ar->queue_stop_timeout[i]) : 0,
 419                     jiffies_to_msecs(ar->max_queue_stop_timeout[i]));
 420
 421                 ar->max_queue_stop_timeout[i] = 0;
 422         }
 423
 424         return buf;
 425 }
 426 DEBUGFS_DECLARE_RO_FILE(tx_stuck, 180);
 427
 428 static char *carl9170_debugfs_phy_noise_read(struct ar9170 *ar, char *buf,
 429                                              size_t bufsize, ssize_t *len)
 430 {
 431         int err;
 432
 433         err = carl9170_get_noisefloor(ar);
 434         if (err) {
 435                 *len = err;
 436                 return buf;
 437         }
 438
 439         ADD(buf, *len, bufsize, "Chain 0: %10d dBm, ext. chan.:%10d dBm\n",
 440             ar->noise[0], ar->noise[2]);
 441         ADD(buf, *len, bufsize, "Chain 2: %10d dBm, ext. chan.:%10d dBm\n",
 442             ar->noise[1], ar->noise[3]);
 443
 444         return buf;
 445 }
 446 DEBUGFS_DECLARE_RO_FILE(phy_noise, 180);
 447
 448 static char *carl9170_debugfs_vif_dump_read(struct ar9170 *ar, char *buf,
 449                                             size_t bufsize, ssize_t *len)
 450 {
 451         struct carl9170_vif_info *iter;
 452         int i = 0;
 453
 454         ADD(buf, *len, bufsize, "registered VIFs:%d \\ %d\n",
 455             ar->vifs, ar->fw.vif_num);
 456
 457         ADD(buf, *len, bufsize, "VIF bitmap: [");
 458
 459         *len += bitmap_scnprintf(&buf[*len], bufsize - *len,
 460                                  &ar->vif_bitmap, ar->fw.vif_num);
 461
 462         ADD(buf, *len, bufsize, "]\n");
 463
 464         rcu_read_lock();
 465         list_for_each_entry_rcu(iter, &ar->vif_list, list) {
 466                 struct ieee80211_vif *vif = carl9170_get_vif(iter);
 467                 ADD(buf, *len, bufsize, "\t%d = [%s VIF, id:%d, type:%x "
 468                     " mac:%pM %s]\n", i, (carl9170_get_main_vif(ar) == vif ?
 469                     "Master" : " Slave"), iter->id, vif->type, vif->addr,
 470                     iter->enable_beacon ? "beaconing " : "");
 471                 i++;
 472         }
 473         rcu_read_unlock();
 474
 475         return buf;
 476 }
 477 DEBUGFS_DECLARE_RO_FILE(vif_dump, 8000);
 478
 479 #define UPDATE_COUNTER(ar, name)        ({                              \
 480         u32 __tmp[ARRAY_SIZE(name##_regs)];                             \
 481         unsigned int __i, __err = -ENODEV;                              \
 482                                                                         \
 483         for (__i = 0; __i < ARRAY_SIZE(name##_regs); __i++) {           \
 484                 __tmp[__i] = name##_regs[__i].reg;                      \
 485                 ar->debug.stats.name##_counter[__i] = 0;                \
 486         }                                                               \
 487                                                                         \
 488         if (IS_STARTED(ar))                                             \
 489                 __err = carl9170_read_mreg(ar, ARRAY_SIZE(name##_regs), \
 490                         __tmp, ar->debug.stats.name##_counter);         \
 491         (__err); })
 492
 493 #define TALLY_SUM_UP(ar, name)  do {                                    \
 494         unsigned int __i;                                               \
 495                                                                         \
 496         for (__i = 0; __i < ARRAY_SIZE(name##_regs); __i++) {           \
 497                 ar->debug.stats.name##_sum[__i] +=                      \
 498                         ar->debug.stats.name##_counter[__i];            \
 499         }                                                               \
 500 } while (0)
 501
 502 #define DEBUGFS_HW_TALLY_FILE(name, f)                                  \
 503 static char *carl9170_debugfs_##name ## _read(struct ar9170 *ar,        \
 504          char *dum, size_t bufsize, ssize_t *ret)                       \
 505 {                                                                       \
 506         char *buf;                                                      \
 507         int i, max_len, err;                                            \
 508                                                                         \
 509         max_len = ARRAY_SIZE(name##_regs) * 80;                         \
 510         buf = vmalloc(max_len);                                         \
 511         if (!buf)                                                       \
 512                 return NULL;                                            \
 513                                                                         \
 514         err = UPDATE_COUNTER(ar, name);                                 \
 515         if (err) {                                                      \
 516                 *ret = err;                                             \
 517                 return buf;                                             \
 518         }                                                               \
 519                                                                         \
 520         TALLY_SUM_UP(ar, name);                                         \
 521                                                                         \
 522         for (i = 0; i < ARRAY_SIZE(name##_regs); i++) {                 \
 523                 ADD(buf, *ret, max_len, "%22s = %" f "[+%" f "]\n",     \
 524                     name##_regs[i].nreg, ar->debug.stats.name ##_sum[i],\
 525                     ar->debug.stats.name ##_counter[i]);                \
 526         }                                                               \
 527                                                                         \
 528         return buf;                                                     \
 529 }                                                                       \
 530 DEBUGFS_DECLARE_RO_FILE(name, 0);
 531
 532 #define DEBUGFS_HW_REG_FILE(name, f)                                    \
 533 static char *carl9170_debugfs_##name ## _read(struct ar9170 *ar,        \
 534         char *dum, size_t bufsize, ssize_t *ret)                        \
 535 {                                                                       \
 536         char *buf;                                                      \
 537         int i, max_len, err;                                            \
 538                                                                         \
 539         max_len = ARRAY_SIZE(name##_regs) * 80;                         \
 540         buf = vmalloc(max_len);                                         \
 541         if (!buf)                                                       \
 542                 return NULL;                                            \
 543                                                                         \
 544         err = UPDATE_COUNTER(ar, name);                                 \
 545         if (err) {                                                      \
 546                 *ret = err;                                             \
 547                 return buf;                                             \
 548         }                                                               \
 549                                                                         \
 550         for (i = 0; i < ARRAY_SIZE(name##_regs); i++) {                 \
 551                 ADD(buf, *ret, max_len, "%22s = %" f "\n",              \
 552                     name##_regs[i].nreg,                                \
 553                     ar->debug.stats.name##_counter[i]);                 \
 554         }                                                               \
 555                                                                         \
 556         return buf;                                                     \
 557 }                                                                       \
 558 DEBUGFS_DECLARE_RO_FILE(name, 0);
 559
 560 static ssize_t carl9170_debugfs_hw_ioread32_write(struct ar9170 *ar,
 561         const char *buf, size_t count)
 562 {
 563         int err = 0, i, n = 0, max_len = 32, res;
 564         unsigned int reg, tmp;
 565
 566         if (!count)
 567                 return 0;
 568
 569         if (count > max_len)
 570                 return -E2BIG;
 571
 572         res = sscanf(buf, "0x%X %d", &reg, &n);
 573         if (res < 1) {
 574                 err = -EINVAL;
 575                 goto out;
 576         }
 577
 578         if (res == 1)
 579                 n = 1;
 580
 581         if (n > 15) {
 582                 err = -EMSGSIZE;
 583                 goto out;
 584         }
 585
 586         if ((reg >= 0x280000) || ((reg + (n << 2)) >= 0x280000)) {
 587                 err = -EADDRNOTAVAIL;
 588                 goto out;
 589         }
 590
 591         if (reg & 3) {
 592                 err = -EINVAL;
 593                 goto out;
 594         }
 595
 596         for (i = 0; i < n; i++) {
 597                 err = carl9170_read_reg(ar, reg + (i << 2), &tmp);
 598                 if (err)
 599                         goto out;
 600
 601                 ar->debug.ring[ar->debug.ring_tail].reg = reg + (i << 2);
 602                 ar->debug.ring[ar->debug.ring_tail].value = tmp;
 603                 ar->debug.ring_tail++;
 604                 ar->debug.ring_tail %= CARL9170_DEBUG_RING_SIZE;
 605         }
 606
 607 out:
 608         return err ? err : count;
 609 }
 610
 611 static char *carl9170_debugfs_hw_ioread32_read(struct ar9170 *ar, char *buf,
 612                                                size_t bufsize, ssize_t *ret)
 613 {
 614         int i = 0;
 615
 616         while (ar->debug.ring_head != ar->debug.ring_tail) {
 617                 ADD(buf, *ret, bufsize, "%.8x = %.8x\n",
 618                     ar->debug.ring[ar->debug.ring_head].reg,
 619                     ar->debug.ring[ar->debug.ring_head].value);
 620
 621                 ar->debug.ring_head++;
 622                 ar->debug.ring_head %= CARL9170_DEBUG_RING_SIZE;
 623
 624                 if (i++ == 64)
 625                         break;
 626         }
 627         ar->debug.ring_head = ar->debug.ring_tail;
 628         return buf;
 629 }
 630 DEBUGFS_DECLARE_RW_FILE(hw_ioread32, CARL9170_DEBUG_RING_SIZE * 40);
 631
 632 static ssize_t carl9170_debugfs_bug_write(struct ar9170 *ar, const char *buf,
 633                                           size_t count)
 634 {
 635         int err;
 636
 637         if (count < 1)
 638                 return -EINVAL;
 639
 640         switch (buf[0]) {
 641         case 'F':
 642                 ar->needs_full_reset = true;
 643                 break;
 644
 645         case 'R':
 646                 if (!IS_STARTED(ar)) {
 647                         err = -EAGAIN;
 648                         goto out;
 649                 }
 650
 651                 ar->needs_full_reset = false;
 652                 break;
 653
 654         case 'M':
 655                 err = carl9170_mac_reset(ar);
 656                 if (err < 0)
 657                         count = err;
 658
 659                 goto out;
 660
 661         case 'P':
 662                 err = carl9170_set_channel(ar, ar->hw->conf.channel,
 663                         ar->hw->conf.channel_type, CARL9170_RFI_COLD);
 664                 if (err < 0)
 665                         count = err;
 666
 667                 goto out;
 668
 669         default:
 670                 return -EINVAL;
 671         }
 672
 673         carl9170_restart(ar, CARL9170_RR_USER_REQUEST);
 674
 675 out:
 676         return count;
 677 }
 678
 679 static char *carl9170_debugfs_bug_read(struct ar9170 *ar, char *buf,
 680                                        size_t bufsize, ssize_t *ret)
 681 {
 682         ADD(buf, *ret, bufsize, "[P]hy reinit, [R]estart, [F]ull usb reset, "
 683             "[M]ac reset\n");
 684         ADD(buf, *ret, bufsize, "firmware restarts:%d, last reason:%d\n",
 685                 ar->restart_counter, ar->last_reason);
 686         ADD(buf, *ret, bufsize, "phy reinit errors:%d (%d)\n",
 687                 ar->total_chan_fail, ar->chan_fail);
 688         ADD(buf, *ret, bufsize, "reported firmware errors:%d\n",
 689                 ar->fw.err_counter);
 690         ADD(buf, *ret, bufsize, "reported firmware BUGs:%d\n",
 691                 ar->fw.bug_counter);
 692         ADD(buf, *ret, bufsize, "pending restart requests:%d\n",
 693                 atomic_read(&ar->pending_restarts));
 694         return buf;
 695 }
 696 __DEBUGFS_DECLARE_RW_FILE(bug, 400, CARL9170_STOPPED);
 697
 698 static const char *const erp_modes[] = {
 699         [CARL9170_ERP_INVALID] = "INVALID",
 700         [CARL9170_ERP_AUTO] = "Automatic",
 701         [CARL9170_ERP_MAC80211] = "Set by MAC80211",
 702         [CARL9170_ERP_OFF] = "Force Off",
 703         [CARL9170_ERP_RTS] = "Force RTS",
 704         [CARL9170_ERP_CTS] = "Force CTS"
 705 };
 706
 707 static char *carl9170_debugfs_erp_read(struct ar9170 *ar, char *buf,
 708                                        size_t bufsize, ssize_t *ret)
 709 {
 710         ADD(buf, *ret, bufsize, "ERP Setting: (%d) -> %s\n", ar->erp_mode,
 711             erp_modes[ar->erp_mode]);
 712         return buf;
 713 }
 714
 715 static ssize_t carl9170_debugfs_erp_write(struct ar9170 *ar, const char *buf,
 716                                           size_t count)
 717 {
 718         int res, val;
 719
 720         if (count < 1)
 721                 return -EINVAL;
 722
 723         res = sscanf(buf, "%d", &val);
 724         if (res != 1)
 725                 return -EINVAL;
 726
 727         if (!((val > CARL9170_ERP_INVALID) &&
 728               (val < __CARL9170_ERP_NUM)))
 729                 return -EINVAL;
 730
 731         ar->erp_mode = val;
 732         return count;
 733 }
 734
 735 DEBUGFS_DECLARE_RW_FILE(erp, 80);
 736
 737 static ssize_t carl9170_debugfs_hw_iowrite32_write(struct ar9170 *ar,
 738         const char *buf, size_t count)
 739 {
 740         int err = 0, max_len = 22, res;
 741         u32 reg, val;
 742
 743         if (!count)
 744                 return 0;
 745
 746         if (count > max_len)
 747                 return -E2BIG;
 748
 749         res = sscanf(buf, "0x%X 0x%X", &reg, &val);
 750         if (res != 2) {
 751                 err = -EINVAL;
 752                 goto out;
 753         }
 754
 755         if (reg <= 0x100000 || reg >= 0x280000) {
 756                 err = -EADDRNOTAVAIL;
 757                 goto out;
 758         }
 759
 760         if (reg & 3) {
 761                 err = -EINVAL;
 762                 goto out;
 763         }
 764
 765         err = carl9170_write_reg(ar, reg, val);
 766         if (err)
 767                 goto out;
 768
 769 out:
 770         return err ? err : count;
 771 }
 772 DEBUGFS_DECLARE_WO_FILE(hw_iowrite32);
 773
 774 DEBUGFS_HW_TALLY_FILE(hw_tx_tally, "u");
 775 DEBUGFS_HW_TALLY_FILE(hw_rx_tally, "u");
 776 DEBUGFS_HW_TALLY_FILE(hw_phy_errors, "u");
 777 DEBUGFS_HW_REG_FILE(hw_wlan_queue, ".8x");
 778 DEBUGFS_HW_REG_FILE(hw_pta_queue, ".8x");
 779 DEBUGFS_HW_REG_FILE(hw_ampdu_info, ".8x");
 780 DEBUGFS_QUEUE_DUMP(tx_status, 0);
 781 DEBUGFS_QUEUE_DUMP(tx_status, 1);
 782 DEBUGFS_QUEUE_DUMP(tx_status, 2);
 783 DEBUGFS_QUEUE_DUMP(tx_status, 3);
 784 DEBUGFS_QUEUE_DUMP(tx_pending, 0);
 785 DEBUGFS_QUEUE_DUMP(tx_pending, 1);
 786 DEBUGFS_QUEUE_DUMP(tx_pending, 2);
 787 DEBUGFS_QUEUE_DUMP(tx_pending, 3);
 788 DEBUGFS_READONLY_FILE(usb_tx_anch_urbs, 20, "%d",
 789                       atomic_read(&ar->tx_anch_urbs));
 790 DEBUGFS_READONLY_FILE(usb_rx_anch_urbs, 20, "%d",
 791                       atomic_read(&ar->rx_anch_urbs));
 792 DEBUGFS_READONLY_FILE(usb_rx_work_urbs, 20, "%d",
 793                       atomic_read(&ar->rx_work_urbs));
 794 DEBUGFS_READONLY_FILE(usb_rx_pool_urbs, 20, "%d",
 795                       atomic_read(&ar->rx_pool_urbs));
 796
 797 DEBUGFS_READONLY_FILE(tx_total_queued, 20, "%d",
 798                       atomic_read(&ar->tx_total_queued));
 799 DEBUGFS_READONLY_FILE(tx_ampdu_scheduler, 20, "%d",
 800                       atomic_read(&ar->tx_ampdu_scheduler));
 801
 802 DEBUGFS_READONLY_FILE(tx_total_pending, 20, "%d",
 803                       atomic_read(&ar->tx_total_pending));
 804
 805 DEBUGFS_READONLY_FILE(tx_ampdu_list_len, 20, "%d",
 806                       ar->tx_ampdu_list_len);
 807
 808 DEBUGFS_READONLY_FILE(tx_ampdu_upload, 20, "%d",
 809                       atomic_read(&ar->tx_ampdu_upload));
 810
 811 DEBUGFS_READONLY_FILE(tx_janitor_last_run, 64, "last run:%d ms ago",
 812         jiffies_to_msecs(jiffies - ar->tx_janitor_last_run));
 813
 814 DEBUGFS_READONLY_FILE(tx_dropped, 20, "%d", ar->tx_dropped);
 815
 816 DEBUGFS_READONLY_FILE(rx_dropped, 20, "%d", ar->rx_dropped);
 817
 818 DEBUGFS_READONLY_FILE(sniffer_enabled, 20, "%d", ar->sniffer_enabled);
 819 DEBUGFS_READONLY_FILE(rx_software_decryption, 20, "%d",
 820                       ar->rx_software_decryption);
 821 DEBUGFS_READONLY_FILE(ampdu_factor, 20, "%d",
 822                       ar->current_factor);
 823 DEBUGFS_READONLY_FILE(ampdu_density, 20, "%d",
 824                       ar->current_density);
 825
 826 DEBUGFS_READONLY_FILE(beacon_int, 20, "%d TU", ar->global_beacon_int);
 827 DEBUGFS_READONLY_FILE(pretbtt, 20, "%d TU", ar->global_pretbtt);
 828
 829 void carl9170_debugfs_register(struct ar9170 *ar)
 830 {
 831         ar->debug_dir = debugfs_create_dir(KBUILD_MODNAME,
 832                 ar->hw->wiphy->debugfsdir);
 833
 834 #define DEBUGFS_ADD(name)                                               \
 835         debugfs_create_file(#name, carl_debugfs_##name ##_ops.attr,     \
 836                             ar->debug_dir, ar,                          \
 837                             &carl_debugfs_##name ## _ops.fops);
 838
 839         DEBUGFS_ADD(usb_tx_anch_urbs);
 840         DEBUGFS_ADD(usb_rx_pool_urbs);
 841         DEBUGFS_ADD(usb_rx_anch_urbs);
 842         DEBUGFS_ADD(usb_rx_work_urbs);
 843
 844         DEBUGFS_ADD(tx_total_queued);
 845         DEBUGFS_ADD(tx_total_pending);
 846         DEBUGFS_ADD(tx_dropped);
 847         DEBUGFS_ADD(tx_stuck);
 848         DEBUGFS_ADD(tx_ampdu_upload);
 849         DEBUGFS_ADD(tx_ampdu_scheduler);
 850         DEBUGFS_ADD(tx_ampdu_list_len);
 851
 852         DEBUGFS_ADD(rx_dropped);
 853         DEBUGFS_ADD(sniffer_enabled);
 854         DEBUGFS_ADD(rx_software_decryption);
 855
 856         DEBUGFS_ADD(mem_usage);
 857         DEBUGFS_ADD(qos_stat);
 858         DEBUGFS_ADD(sta_psm);
 859         DEBUGFS_ADD(ampdu_state);
 860
 861         DEBUGFS_ADD(hw_tx_tally);
 862         DEBUGFS_ADD(hw_rx_tally);
 863         DEBUGFS_ADD(hw_phy_errors);
 864         DEBUGFS_ADD(phy_noise);
 865
 866         DEBUGFS_ADD(hw_wlan_queue);
 867         DEBUGFS_ADD(hw_pta_queue);
 868         DEBUGFS_ADD(hw_ampdu_info);
 869
 870         DEBUGFS_ADD(ampdu_density);
 871         DEBUGFS_ADD(ampdu_factor);
 872
 873         DEBUGFS_ADD(tx_janitor_last_run);
 874
 875         DEBUGFS_ADD(tx_status_0);
 876         DEBUGFS_ADD(tx_status_1);
 877         DEBUGFS_ADD(tx_status_2);
 878         DEBUGFS_ADD(tx_status_3);
 879
 880         DEBUGFS_ADD(tx_pending_0);
 881         DEBUGFS_ADD(tx_pending_1);
 882         DEBUGFS_ADD(tx_pending_2);
 883         DEBUGFS_ADD(tx_pending_3);
 884
 885         DEBUGFS_ADD(hw_ioread32);
 886         DEBUGFS_ADD(hw_iowrite32);
 887         DEBUGFS_ADD(bug);
 888
 889         DEBUGFS_ADD(erp);
 890
 891         DEBUGFS_ADD(vif_dump);
 892
 893         DEBUGFS_ADD(beacon_int);
 894         DEBUGFS_ADD(pretbtt);
 895
 896 #undef DEBUGFS_ADD
 897 }
 898
 899 void carl9170_debugfs_unregister(struct ar9170 *ar)
 900 {
 901         debugfs_remove_recursive(ar->debug_dir);
 902 }