kernel/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/slab.h>
  41 #include <linux/module.h>
  42 #include <linux/seq_file.h>
  43 #include <linux/vmalloc.h>
  44 #include "carl9170.h"
  45 #include "cmd.h"
  46
  47 #define ADD(buf, off, max, fmt, args...)                                \
  48         off += snprintf(&buf[off], max - off, fmt, ##args);
  49
  50
  51 struct carl9170_debugfs_fops {
  52         unsigned int read_bufsize;
  53         umode_t attr;
  54         char *(*read)(struct ar9170 *ar, char *buf, size_t bufsize,
  55                       ssize_t *len);
  56         ssize_t (*write)(struct ar9170 *aru, const char *buf, size_t size);
  57         const struct file_operations fops;
  58
  59         enum carl9170_device_state req_dev_state;
  60 };
  61
  62 static ssize_t carl9170_debugfs_read(struct file *file, char __user *userbuf,
  63                                      size_t count, loff_t *ppos)
  64 {
  65         struct carl9170_debugfs_fops *dfops;
  66         struct ar9170 *ar;
  67         char *buf = NULL, *res_buf = NULL;
  68         ssize_t ret = 0;
  69         int err = 0;
  70
  71         if (!count)
  72                 return 0;
  73
  74         ar = file->private_data;
  75
  76         if (!ar)
  77                 return -ENODEV;
  78         dfops = container_of(file->f_op, struct carl9170_debugfs_fops, fops);
  79
  80         if (!dfops->read)
  81                 return -ENOSYS;
  82
  83         if (dfops->read_bufsize) {
  84                 buf = vmalloc(dfops->read_bufsize);
  85                 if (!buf)
  86                         return -ENOMEM;
  87         }
  88
  89         mutex_lock(&ar->mutex);
  90         if (!CHK_DEV_STATE(ar, dfops->req_dev_state)) {
  91                 err = -ENODEV;
  92                 res_buf = buf;
  93                 goto out_free;
  94         }
  95
  96         res_buf = dfops->read(ar, buf, dfops->read_bufsize, &ret);
  97
  98         if (ret > 0)
  99                 err = simple_read_from_buffer(userbuf, count, ppos,
 100                                               res_buf, ret);
 101         else
 102                 err = ret;
 103
 104         WARN_ON_ONCE(dfops->read_bufsize && (res_buf != buf));
 105
 106 out_free:
 107         vfree(res_buf);
 108         mutex_unlock(&ar->mutex);
 109         return err;
 110 }
 111
 112 static ssize_t carl9170_debugfs_write(struct file *file,
 113         const char __user *userbuf, size_t count, loff_t *ppos)
 114 {
 115         struct carl9170_debugfs_fops *dfops;
 116         struct ar9170 *ar;
 117         char *buf = NULL;
 118         int err = 0;
 119
 120         if (!count)
 121                 return 0;
 122
 123         if (count > PAGE_SIZE)
 124                 return -E2BIG;
 125
 126         ar = file->private_data;
 127
 128         if (!ar)
 129                 return -ENODEV;
 130         dfops = container_of(file->f_op, struct carl9170_debugfs_fops, fops);
 131
 132         if (!dfops->write)
 133                 return -ENOSYS;
 134
 135         buf = vmalloc(count);
 136         if (!buf)
 137                 return -ENOMEM;
 138
 139         if (copy_from_user(buf, userbuf, count)) {
 140                 err = -EFAULT;
 141                 goto out_free;
 142         }
 143
 144         if (mutex_trylock(&ar->mutex) == 0) {
 145                 err = -EAGAIN;
 146                 goto out_free;
 147         }
 148
 149         if (!CHK_DEV_STATE(ar, dfops->req_dev_state)) {
 150                 err = -ENODEV;
 151                 goto out_unlock;
 152         }
 153
 154         err = dfops->write(ar, buf, count);
 155         if (err)
 156                 goto out_unlock;
 157
 158 out_unlock:
 159         mutex_unlock(&ar->mutex);
 160
 161 out_free:
 162         vfree(buf);
 163         return err;
 164 }
 165
 166 #define __DEBUGFS_DECLARE_FILE(name, _read, _write, _read_bufsize,      \
 167                                _attr, _dstate)                          \
 168 static const struct carl9170_debugfs_fops carl_debugfs_##name ##_ops = {\
 169         .read_bufsize = _read_bufsize,                                  \
 170         .read = _read,                                                  \
 171         .write = _write,                                                \
 172         .attr = _attr,                                                  \
 173         .req_dev_state = _dstate,                                       \
 174         .fops = {                                                       \
 175                 .open   = simple_open,                                  \
 176                 .read   = carl9170_debugfs_read,                        \
 177                 .write  = carl9170_debugfs_write,                       \
 178                 .owner  = THIS_MODULE                                   \
 179         },                                                              \
 180 }
 181
 182 #define DEBUGFS_DECLARE_FILE(name, _read, _write, _read_bufsize, _attr) \
 183         __DEBUGFS_DECLARE_FILE(name, _read, _write, _read_bufsize,      \
 184                                _attr, CARL9170_STARTED)                 \
 185
 186 #define DEBUGFS_DECLARE_RO_FILE(name, _read_bufsize)                    \
 187         DEBUGFS_DECLARE_FILE(name, carl9170_debugfs_##name ##_read,     \
 188                              NULL, _read_bufsize, S_IRUSR)
 189
 190 #define DEBUGFS_DECLARE_WO_FILE(name)                                   \
 191         DEBUGFS_DECLARE_FILE(name, NULL, carl9170_debugfs_##name ##_write,\
 192                              0, S_IWUSR)
 193
 194 #define DEBUGFS_DECLARE_RW_FILE(name, _read_bufsize)                    \
 195         DEBUGFS_DECLARE_FILE(name, carl9170_debugfs_##name ##_read,     \
 196                              carl9170_debugfs_##name ##_write,          \
 197                              _read_bufsize, S_IRUSR | S_IWUSR)
 198
 199 #define __DEBUGFS_DECLARE_RW_FILE(name, _read_bufsize, _dstate)         \
 200         __DEBUGFS_DECLARE_FILE(name, carl9170_debugfs_##name ##_read,   \
 201                              carl9170_debugfs_##name ##_write,          \
 202                              _read_bufsize, S_IRUSR | S_IWUSR, _dstate)
 203
 204 #define DEBUGFS_READONLY_FILE(name, _read_bufsize, fmt, value...)       \
 205 static char *carl9170_debugfs_ ##name ## _read(struct ar9170 *ar,       \
 206                                              char *buf, size_t buf_size,\
 207                                              ssize_t *len)              \
 208 {                                                                       \
 209         ADD(buf, *len, buf_size, fmt "\n", ##value);                    \
 210         return buf;                                                     \
 211 }                                                                       \
 212 DEBUGFS_DECLARE_RO_FILE(name, _read_bufsize)
 213
 214 static char *carl9170_debugfs_mem_usage_read(struct ar9170 *ar, char *buf,
 215                                              size_t bufsize, ssize_t *len)
 216 {
 217         spin_lock_bh(&ar->mem_lock);
 218
 219         ADD(buf, *len, bufsize, "jar: [%*pb]\n",
 220             ar->fw.mem_blocks, ar->mem_bitmap);
 221
 222         ADD(buf, *len, bufsize, "cookies: used:%3d / total:%3d, allocs:%d\n",
 223             bitmap_weight(ar->mem_bitmap, ar->fw.mem_blocks),
 224             ar->fw.mem_blocks, atomic_read(&ar->mem_allocs));
 225
 226         ADD(buf, *len, bufsize, "memory: free:%3d (%3d KiB) / total:%3d KiB)\n",
 227             atomic_read(&ar->mem_free_blocks),
 228             (atomic_read(&ar->mem_free_blocks) * ar->fw.mem_block_size) / 1024,
 229             (ar->fw.mem_blocks * ar->fw.mem_block_size) / 1024);
 230
 231         spin_unlock_bh(&ar->mem_lock);
 232
 233         return buf;
 234 }
 235 DEBUGFS_DECLARE_RO_FILE(mem_usage, 512);
 236
 237 static char *carl9170_debugfs_qos_stat_read(struct ar9170 *ar, char *buf,
 238                                             size_t bufsize, ssize_t *len)
 239 {
 240         ADD(buf, *len, bufsize, "%s QoS AC\n", modparam_noht ? "Hardware" :
 241             "Software");
 242
 243         ADD(buf, *len, bufsize, "[     VO            VI       "
 244                                  "     BE            BK      ]\n");
 245
 246         spin_lock_bh(&ar->tx_stats_lock);
 247         ADD(buf, *len, bufsize, "[length/limit  length/limit  "
 248                                  "length/limit  length/limit ]\n"
 249                                 "[   %3d/%3d       %3d/%3d    "
 250                                  "   %3d/%3d       %3d/%3d   ]\n\n",
 251             ar->tx_stats[0].len, ar->tx_stats[0].limit,
 252             ar->tx_stats[1].len, ar->tx_stats[1].limit,
 253             ar->tx_stats[2].len, ar->tx_stats[2].limit,
 254             ar->tx_stats[3].len, ar->tx_stats[3].limit);
 255
 256         ADD(buf, *len, bufsize, "[    total         total     "
 257                                  "    total         total    ]\n"
 258                                 "[%10d    %10d    %10d    %10d   ]\n\n",
 259             ar->tx_stats[0].count, ar->tx_stats[1].count,
 260             ar->tx_stats[2].count, ar->tx_stats[3].count);
 261
 262         spin_unlock_bh(&ar->tx_stats_lock);
 263
 264         ADD(buf, *len, bufsize, "[  pend/waittx   pend/waittx "
 265                                  "  pend/waittx   pend/waittx]\n"
 266                                 "[   %3d/%3d       %3d/%3d    "
 267                                  "   %3d/%3d       %3d/%3d   ]\n\n",
 268             skb_queue_len(&ar->tx_pending[0]),
 269             skb_queue_len(&ar->tx_status[0]),
 270             skb_queue_len(&ar->tx_pending[1]),
 271             skb_queue_len(&ar->tx_status[1]),
 272             skb_queue_len(&ar->tx_pending[2]),
 273             skb_queue_len(&ar->tx_status[2]),
 274             skb_queue_len(&ar->tx_pending[3]),
 275             skb_queue_len(&ar->tx_status[3]));
 276
 277         return buf;
 278 }
 279 DEBUGFS_DECLARE_RO_FILE(qos_stat, 512);
 280
 281 static void carl9170_debugfs_format_frame(struct ar9170 *ar,
 282         struct sk_buff *skb, const char *prefix, char *buf,
 283         ssize_t *off, ssize_t bufsize)
 284 {
 285         struct _carl9170_tx_superframe *txc = (void *) skb->data;
 286         struct ieee80211_tx_info *txinfo = IEEE80211_SKB_CB(skb);
 287         struct carl9170_tx_info *arinfo = (void *) txinfo->rate_driver_data;
 288         struct ieee80211_hdr *hdr = (void *) txc->frame_data;
 289
 290         ADD(buf, *off, bufsize, "%s %p, c:%2x, DA:%pM, sq:%4d, mc:%.4x, "
 291             "pc:%.8x, to:%d ms\n", prefix, skb, txc->s.cookie,
 292             ieee80211_get_DA(hdr), get_seq_h(hdr),
 293             le16_to_cpu(txc->f.mac_control), le32_to_cpu(txc->f.phy_control),
 294             jiffies_to_msecs(jiffies - arinfo->timeout));
 295 }
 296
 297
 298 static char *carl9170_debugfs_ampdu_state_read(struct ar9170 *ar, char *buf,
 299                                                size_t bufsize, ssize_t *len)
 300 {
 301         struct carl9170_sta_tid *iter;
 302         struct sk_buff *skb;
 303         int cnt = 0, fc;
 304         int offset;
 305
 306         rcu_read_lock();
 307         list_for_each_entry_rcu(iter, &ar->tx_ampdu_list, list) {
 308
 309                 spin_lock_bh(&iter->lock);
 310                 ADD(buf, *len, bufsize, "Entry: #%2d TID:%1d, BSN:%4d, "
 311                     "SNX:%4d, HSN:%4d, BAW:%2d, state:%1d, toggles:%d\n",
 312                     cnt, iter->tid, iter->bsn, iter->snx, iter->hsn,
 313                     iter->max, iter->state, iter->counter);
 314
 315                 ADD(buf, *len, bufsize, "\tWindow:  [%*pb,W]\n",
 316                     CARL9170_BAW_BITS, iter->bitmap);
 317
 318 #define BM_STR_OFF(offset)                                      \
 319         ((CARL9170_BAW_BITS - (offset) - 1) / 4 +               \
 320          (CARL9170_BAW_BITS - (offset) - 1) / 32 + 1)
 321
 322                 offset = BM_STR_OFF(0);
 323                 ADD(buf, *len, bufsize, "\tBase Seq: %*s\n", offset, "T");
 324
 325                 offset = BM_STR_OFF(SEQ_DIFF(iter->snx, iter->bsn));
 326                 ADD(buf, *len, bufsize, "\tNext Seq: %*s\n", offset, "W");
 327
 328                 offset = BM_STR_OFF(((int)iter->hsn - (int)iter->bsn) %
 329                                      CARL9170_BAW_BITS);
 330                 ADD(buf, *len, bufsize, "\tLast Seq: %*s\n", offset, "N");
 331
 332                 ADD(buf, *len, bufsize, "\tPre-Aggregation reorder buffer: "
 333                     " currently queued:%d\n", skb_queue_len(&iter->queue));
 334
 335                 fc = 0;
 336                 skb_queue_walk(&iter->queue, skb) {
 337                         char prefix[32];
 338
 339                         snprintf(prefix, sizeof(prefix), "\t\t%3d :", fc);
 340                         carl9170_debugfs_format_frame(ar, skb, prefix, buf,
 341                                                       len, bufsize);
 342
 343                         fc++;
 344                 }
 345                 spin_unlock_bh(&iter->lock);
 346                 cnt++;
 347         }
 348         rcu_read_unlock();
 349
 350         return buf;
 351 }
 352 DEBUGFS_DECLARE_RO_FILE(ampdu_state, 8000);
 353
 354 static void carl9170_debugfs_queue_dump(struct ar9170 *ar, char *buf,
 355         ssize_t *len, size_t bufsize, struct sk_buff_head *queue)
 356 {
 357         struct sk_buff *skb;
 358         char prefix[16];
 359         int fc = 0;
 360
 361         spin_lock_bh(&queue->lock);
 362         skb_queue_walk(queue, skb) {
 363                 snprintf(prefix, sizeof(prefix), "%3d :", fc);
 364                 carl9170_debugfs_format_frame(ar, skb, prefix, buf,
 365                                               len, bufsize);
 366                 fc++;
 367         }
 368         spin_unlock_bh(&queue->lock);
 369 }
 370
 371 #define DEBUGFS_QUEUE_DUMP(q, qi)                                       \
 372 static char *carl9170_debugfs_##q ##_##qi ##_read(struct ar9170 *ar,    \
 373         char *buf, size_t bufsize, ssize_t *len)                        \
 374 {                                                                       \
 375         carl9170_debugfs_queue_dump(ar, buf, len, bufsize, &ar->q[qi]); \
 376         return buf;                                                     \
 377 }                                                                       \
 378 DEBUGFS_DECLARE_RO_FILE(q##_##qi, 8000);
 379
 380 static char *carl9170_debugfs_sta_psm_read(struct ar9170 *ar, char *buf,
 381                                            size_t bufsize, ssize_t *len)
 382 {
 383         ADD(buf, *len, bufsize, "psm state: %s\n", (ar->ps.off_override ?
 384             "FORCE CAM" : (ar->ps.state ? "PSM" : "CAM")));
 385
 386         ADD(buf, *len, bufsize, "sleep duration: %d ms.\n", ar->ps.sleep_ms);
 387         ADD(buf, *len, bufsize, "last power-state transition: %d ms ago.\n",
 388             jiffies_to_msecs(jiffies - ar->ps.last_action));
 389         ADD(buf, *len, bufsize, "last CAM->PSM transition: %d ms ago.\n",
 390             jiffies_to_msecs(jiffies - ar->ps.last_slept));
 391
 392         return buf;
 393 }
 394 DEBUGFS_DECLARE_RO_FILE(sta_psm, 160);
 395
 396 static char *carl9170_debugfs_tx_stuck_read(struct ar9170 *ar, char *buf,
 397                                             size_t bufsize, ssize_t *len)
 398 {
 399         int i;
 400
 401         for (i = 0; i < ar->hw->queues; i++) {
 402                 ADD(buf, *len, bufsize, "TX queue [%d]: %10d max:%10d ms.\n",
 403                     i, ieee80211_queue_stopped(ar->hw, i) ?
 404                     jiffies_to_msecs(jiffies - ar->queue_stop_timeout[i]) : 0,
 405                     jiffies_to_msecs(ar->max_queue_stop_timeout[i]));
 406
 407                 ar->max_queue_stop_timeout[i] = 0;
 408         }
 409
 410         return buf;
 411 }
 412 DEBUGFS_DECLARE_RO_FILE(tx_stuck, 180);
 413
 414 static char *carl9170_debugfs_phy_noise_read(struct ar9170 *ar, char *buf,
 415                                              size_t bufsize, ssize_t *len)
 416 {
 417         int err;
 418
 419         err = carl9170_get_noisefloor(ar);
 420         if (err) {
 421                 *len = err;
 422                 return buf;
 423         }
 424
 425         ADD(buf, *len, bufsize, "Chain 0: %10d dBm, ext. chan.:%10d dBm\n",
 426             ar->noise[0], ar->noise[2]);
 427         ADD(buf, *len, bufsize, "Chain 2: %10d dBm, ext. chan.:%10d dBm\n",
 428             ar->noise[1], ar->noise[3]);
 429
 430         return buf;
 431 }
 432 DEBUGFS_DECLARE_RO_FILE(phy_noise, 180);
 433
 434 static char *carl9170_debugfs_vif_dump_read(struct ar9170 *ar, char *buf,
 435                                             size_t bufsize, ssize_t *len)
 436 {
 437         struct carl9170_vif_info *iter;
 438         int i = 0;
 439
 440         ADD(buf, *len, bufsize, "registered VIFs:%d \\ %d\n",
 441             ar->vifs, ar->fw.vif_num);
 442
 443         ADD(buf, *len, bufsize, "VIF bitmap: [%*pb]\n",
 444             ar->fw.vif_num, &ar->vif_bitmap);
 445
 446         rcu_read_lock();
 447         list_for_each_entry_rcu(iter, &ar->vif_list, list) {
 448                 struct ieee80211_vif *vif = carl9170_get_vif(iter);
 449                 ADD(buf, *len, bufsize, "\t%d = [%s VIF, id:%d, type:%x "
 450                     " mac:%pM %s]\n", i, (carl9170_get_main_vif(ar) == vif ?
 451                     "Master" : " Slave"), iter->id, vif->type, vif->addr,
 452                     iter->enable_beacon ? "beaconing " : "");
 453                 i++;
 454         }
 455         rcu_read_unlock();
 456
 457         return buf;
 458 }
 459 DEBUGFS_DECLARE_RO_FILE(vif_dump, 8000);
 460
 461 #define UPDATE_COUNTER(ar, name)        ({                              \
 462         u32 __tmp[ARRAY_SIZE(name##_regs)];                             \
 463         unsigned int __i, __err = -ENODEV;                              \
 464                                                                         \
 465         for (__i = 0; __i < ARRAY_SIZE(name##_regs); __i++) {           \
 466                 __tmp[__i] = name##_regs[__i].reg;                      \
 467                 ar->debug.stats.name##_counter[__i] = 0;                \
 468         }                                                               \
 469                                                                         \
 470         if (IS_STARTED(ar))                                             \
 471                 __err = carl9170_read_mreg(ar, ARRAY_SIZE(name##_regs), \
 472                         __tmp, ar->debug.stats.name##_counter);         \
 473         (__err); })
 474
 475 #define TALLY_SUM_UP(ar, name)  do {                                    \
 476         unsigned int __i;                                               \
 477                                                                         \
 478         for (__i = 0; __i < ARRAY_SIZE(name##_regs); __i++) {           \
 479                 ar->debug.stats.name##_sum[__i] +=                      \
 480                         ar->debug.stats.name##_counter[__i];            \
 481         }                                                               \
 482 } while (0)
 483
 484 #define DEBUGFS_HW_TALLY_FILE(name, f)                                  \
 485 static char *carl9170_debugfs_##name ## _read(struct ar9170 *ar,        \
 486          char *dum, size_t bufsize, ssize_t *ret)                       \
 487 {                                                                       \
 488         char *buf;                                                      \
 489         int i, max_len, err;                                            \
 490                                                                         \
 491         max_len = ARRAY_SIZE(name##_regs) * 80;                         \
 492         buf = vmalloc(max_len);                                         \
 493         if (!buf)                                                       \
 494                 return NULL;                                            \
 495                                                                         \
 496         err = UPDATE_COUNTER(ar, name);                                 \
 497         if (err) {                                                      \
 498                 *ret = err;                                             \
 499                 return buf;                                             \
 500         }                                                               \
 501                                                                         \
 502         TALLY_SUM_UP(ar, name);                                         \
 503                                                                         \
 504         for (i = 0; i < ARRAY_SIZE(name##_regs); i++) {                 \
 505                 ADD(buf, *ret, max_len, "%22s = %" f "[+%" f "]\n",     \
 506                     name##_regs[i].nreg, ar->debug.stats.name ##_sum[i],\
 507                     ar->debug.stats.name ##_counter[i]);                \
 508         }                                                               \
 509                                                                         \
 510         return buf;                                                     \
 511 }                                                                       \
 512 DEBUGFS_DECLARE_RO_FILE(name, 0);
 513
 514 #define DEBUGFS_HW_REG_FILE(name, f)                                    \
 515 static char *carl9170_debugfs_##name ## _read(struct ar9170 *ar,        \
 516         char *dum, size_t bufsize, ssize_t *ret)                        \
 517 {                                                                       \
 518         char *buf;                                                      \
 519         int i, max_len, err;                                            \
 520                                                                         \
 521         max_len = ARRAY_SIZE(name##_regs) * 80;                         \
 522         buf = vmalloc(max_len);                                         \
 523         if (!buf)                                                       \
 524                 return NULL;                                            \
 525                                                                         \
 526         err = UPDATE_COUNTER(ar, name);                                 \
 527         if (err) {                                                      \
 528                 *ret = err;                                             \
 529                 return buf;                                             \
 530         }                                                               \
 531                                                                         \
 532         for (i = 0; i < ARRAY_SIZE(name##_regs); i++) {                 \
 533                 ADD(buf, *ret, max_len, "%22s = %" f "\n",              \
 534                     name##_regs[i].nreg,                                \
 535                     ar->debug.stats.name##_counter[i]);                 \
 536         }                                                               \
 537                                                                         \
 538         return buf;                                                     \
 539 }                                                                       \
 540 DEBUGFS_DECLARE_RO_FILE(name, 0);
 541
 542 static ssize_t carl9170_debugfs_hw_ioread32_write(struct ar9170 *ar,
 543         const char *buf, size_t count)
 544 {
 545         int err = 0, i, n = 0, max_len = 32, res;
 546         unsigned int reg, tmp;
 547
 548         if (!count)
 549                 return 0;
 550
 551         if (count > max_len)
 552                 return -E2BIG;
 553
 554         res = sscanf(buf, "0x%X %d", &reg, &n);
 555         if (res < 1) {
 556                 err = -EINVAL;
 557                 goto out;
 558         }
 559
 560         if (res == 1)
 561                 n = 1;
 562
 563         if (n > 15) {
 564                 err = -EMSGSIZE;
 565                 goto out;
 566         }
 567
 568         if ((reg >= 0x280000) || ((reg + (n << 2)) >= 0x280000)) {
 569                 err = -EADDRNOTAVAIL;
 570                 goto out;
 571         }
 572
 573         if (reg & 3) {
 574                 err = -EINVAL;
 575                 goto out;
 576         }
 577
 578         for (i = 0; i < n; i++) {
 579                 err = carl9170_read_reg(ar, reg + (i << 2), &tmp);
 580                 if (err)
 581                         goto out;
 582
 583                 ar->debug.ring[ar->debug.ring_tail].reg = reg + (i << 2);
 584                 ar->debug.ring[ar->debug.ring_tail].value = tmp;
 585                 ar->debug.ring_tail++;
 586                 ar->debug.ring_tail %= CARL9170_DEBUG_RING_SIZE;
 587         }
 588
 589 out:
 590         return err ? err : count;
 591 }
 592
 593 static char *carl9170_debugfs_hw_ioread32_read(struct ar9170 *ar, char *buf,
 594                                                size_t bufsize, ssize_t *ret)
 595 {
 596         int i = 0;
 597
 598         while (ar->debug.ring_head != ar->debug.ring_tail) {
 599                 ADD(buf, *ret, bufsize, "%.8x = %.8x\n",
 600                     ar->debug.ring[ar->debug.ring_head].reg,
 601                     ar->debug.ring[ar->debug.ring_head].value);
 602
 603                 ar->debug.ring_head++;
 604                 ar->debug.ring_head %= CARL9170_DEBUG_RING_SIZE;
 605
 606                 if (i++ == 64)
 607                         break;
 608         }
 609         ar->debug.ring_head = ar->debug.ring_tail;
 610         return buf;
 611 }
 612 DEBUGFS_DECLARE_RW_FILE(hw_ioread32, CARL9170_DEBUG_RING_SIZE * 40);
 613
 614 static ssize_t carl9170_debugfs_bug_write(struct ar9170 *ar, const char *buf,
 615                                           size_t count)
 616 {
 617         int err;
 618
 619         if (count < 1)
 620                 return -EINVAL;
 621
 622         switch (buf[0]) {
 623         case 'F':
 624                 ar->needs_full_reset = true;
 625                 break;
 626
 627         case 'R':
 628                 if (!IS_STARTED(ar)) {
 629                         err = -EAGAIN;
 630                         goto out;
 631                 }
 632
 633                 ar->needs_full_reset = false;
 634                 break;
 635
 636         case 'M':
 637                 err = carl9170_mac_reset(ar);
 638                 if (err < 0)
 639                         count = err;
 640
 641                 goto out;
 642
 643         case 'P':
 644                 err = carl9170_set_channel(ar, ar->hw->conf.chandef.chan,
 645                         cfg80211_get_chandef_type(&ar->hw->conf.chandef));
 646                 if (err < 0)
 647                         count = err;
 648
 649                 goto out;
 650
 651         default:
 652                 return -EINVAL;
 653         }
 654
 655         carl9170_restart(ar, CARL9170_RR_USER_REQUEST);
 656
 657 out:
 658         return count;
 659 }
 660
 661 static char *carl9170_debugfs_bug_read(struct ar9170 *ar, char *buf,
 662                                        size_t bufsize, ssize_t *ret)
 663 {
 664         ADD(buf, *ret, bufsize, "[P]hy reinit, [R]estart, [F]ull usb reset, "
 665             "[M]ac reset\n");
 666         ADD(buf, *ret, bufsize, "firmware restarts:%d, last reason:%d\n",
 667                 ar->restart_counter, ar->last_reason);
 668         ADD(buf, *ret, bufsize, "phy reinit errors:%d (%d)\n",
 669                 ar->total_chan_fail, ar->chan_fail);
 670         ADD(buf, *ret, bufsize, "reported firmware errors:%d\n",
 671                 ar->fw.err_counter);
 672         ADD(buf, *ret, bufsize, "reported firmware BUGs:%d\n",
 673                 ar->fw.bug_counter);
 674         ADD(buf, *ret, bufsize, "pending restart requests:%d\n",
 675                 atomic_read(&ar->pending_restarts));
 676         return buf;
 677 }
 678 __DEBUGFS_DECLARE_RW_FILE(bug, 400, CARL9170_STOPPED);
 679
 680 static const char *const erp_modes[] = {
 681         [CARL9170_ERP_INVALID] = "INVALID",
 682         [CARL9170_ERP_AUTO] = "Automatic",
 683         [CARL9170_ERP_MAC80211] = "Set by MAC80211",
 684         [CARL9170_ERP_OFF] = "Force Off",
 685         [CARL9170_ERP_RTS] = "Force RTS",
 686         [CARL9170_ERP_CTS] = "Force CTS"
 687 };
 688
 689 static char *carl9170_debugfs_erp_read(struct ar9170 *ar, char *buf,
 690                                        size_t bufsize, ssize_t *ret)
 691 {
 692         ADD(buf, *ret, bufsize, "ERP Setting: (%d) -> %s\n", ar->erp_mode,
 693             erp_modes[ar->erp_mode]);
 694         return buf;
 695 }
 696
 697 static ssize_t carl9170_debugfs_erp_write(struct ar9170 *ar, const char *buf,
 698                                           size_t count)
 699 {
 700         int res, val;
 701
 702         if (count < 1)
 703                 return -EINVAL;
 704
 705         res = sscanf(buf, "%d", &val);
 706         if (res != 1)
 707                 return -EINVAL;
 708
 709         if (!((val > CARL9170_ERP_INVALID) &&
 710               (val < __CARL9170_ERP_NUM)))
 711                 return -EINVAL;
 712
 713         ar->erp_mode = val;
 714         return count;
 715 }
 716
 717 DEBUGFS_DECLARE_RW_FILE(erp, 80);
 718
 719 static ssize_t carl9170_debugfs_hw_iowrite32_write(struct ar9170 *ar,
 720         const char *buf, size_t count)
 721 {
 722         int err = 0, max_len = 22, res;
 723         u32 reg, val;
 724
 725         if (!count)
 726                 return 0;
 727
 728         if (count > max_len)
 729                 return -E2BIG;
 730
 731         res = sscanf(buf, "0x%X 0x%X", &reg, &val);
 732         if (res != 2) {
 733                 err = -EINVAL;
 734                 goto out;
 735         }
 736
 737         if (reg <= 0x100000 || reg >= 0x280000) {
 738                 err = -EADDRNOTAVAIL;
 739                 goto out;
 740         }
 741
 742         if (reg & 3) {
 743                 err = -EINVAL;
 744                 goto out;
 745         }
 746
 747         err = carl9170_write_reg(ar, reg, val);
 748         if (err)
 749                 goto out;
 750
 751 out:
 752         return err ? err : count;
 753 }
 754 DEBUGFS_DECLARE_WO_FILE(hw_iowrite32);
 755
 756 DEBUGFS_HW_TALLY_FILE(hw_tx_tally, "u");
 757 DEBUGFS_HW_TALLY_FILE(hw_rx_tally, "u");
 758 DEBUGFS_HW_TALLY_FILE(hw_phy_errors, "u");
 759 DEBUGFS_HW_REG_FILE(hw_wlan_queue, ".8x");
 760 DEBUGFS_HW_REG_FILE(hw_pta_queue, ".8x");
 761 DEBUGFS_HW_REG_FILE(hw_ampdu_info, ".8x");
 762 DEBUGFS_QUEUE_DUMP(tx_status, 0);
 763 DEBUGFS_QUEUE_DUMP(tx_status, 1);
 764 DEBUGFS_QUEUE_DUMP(tx_status, 2);
 765 DEBUGFS_QUEUE_DUMP(tx_status, 3);
 766 DEBUGFS_QUEUE_DUMP(tx_pending, 0);
 767 DEBUGFS_QUEUE_DUMP(tx_pending, 1);
 768 DEBUGFS_QUEUE_DUMP(tx_pending, 2);
 769 DEBUGFS_QUEUE_DUMP(tx_pending, 3);
 770 DEBUGFS_READONLY_FILE(usb_tx_anch_urbs, 20, "%d",
 771                       atomic_read(&ar->tx_anch_urbs));
 772 DEBUGFS_READONLY_FILE(usb_rx_anch_urbs, 20, "%d",
 773                       atomic_read(&ar->rx_anch_urbs));
 774 DEBUGFS_READONLY_FILE(usb_rx_work_urbs, 20, "%d",
 775                       atomic_read(&ar->rx_work_urbs));
 776 DEBUGFS_READONLY_FILE(usb_rx_pool_urbs, 20, "%d",
 777                       atomic_read(&ar->rx_pool_urbs));
 778
 779 DEBUGFS_READONLY_FILE(tx_total_queued, 20, "%d",
 780                       atomic_read(&ar->tx_total_queued));
 781 DEBUGFS_READONLY_FILE(tx_ampdu_scheduler, 20, "%d",
 782                       atomic_read(&ar->tx_ampdu_scheduler));
 783
 784 DEBUGFS_READONLY_FILE(tx_total_pending, 20, "%d",
 785                       atomic_read(&ar->tx_total_pending));
 786
 787 DEBUGFS_READONLY_FILE(tx_ampdu_list_len, 20, "%d",
 788                       ar->tx_ampdu_list_len);
 789
 790 DEBUGFS_READONLY_FILE(tx_ampdu_upload, 20, "%d",
 791                       atomic_read(&ar->tx_ampdu_upload));
 792
 793 DEBUGFS_READONLY_FILE(tx_janitor_last_run, 64, "last run:%d ms ago",
 794         jiffies_to_msecs(jiffies - ar->tx_janitor_last_run));
 795
 796 DEBUGFS_READONLY_FILE(tx_dropped, 20, "%d", ar->tx_dropped);
 797
 798 DEBUGFS_READONLY_FILE(rx_dropped, 20, "%d", ar->rx_dropped);
 799
 800 DEBUGFS_READONLY_FILE(sniffer_enabled, 20, "%d", ar->sniffer_enabled);
 801 DEBUGFS_READONLY_FILE(rx_software_decryption, 20, "%d",
 802                       ar->rx_software_decryption);
 803 DEBUGFS_READONLY_FILE(ampdu_factor, 20, "%d",
 804                       ar->current_factor);
 805 DEBUGFS_READONLY_FILE(ampdu_density, 20, "%d",
 806                       ar->current_density);
 807
 808 DEBUGFS_READONLY_FILE(beacon_int, 20, "%d TU", ar->global_beacon_int);
 809 DEBUGFS_READONLY_FILE(pretbtt, 20, "%d TU", ar->global_pretbtt);
 810
 811 void carl9170_debugfs_register(struct ar9170 *ar)
 812 {
 813         ar->debug_dir = debugfs_create_dir(KBUILD_MODNAME,
 814                 ar->hw->wiphy->debugfsdir);
 815
 816 #define DEBUGFS_ADD(name)                                               \
 817         debugfs_create_file(#name, carl_debugfs_##name ##_ops.attr,     \
 818                             ar->debug_dir, ar,                          \
 819                             &carl_debugfs_##name ## _ops.fops);
 820
 821         DEBUGFS_ADD(usb_tx_anch_urbs);
 822         DEBUGFS_ADD(usb_rx_pool_urbs);
 823         DEBUGFS_ADD(usb_rx_anch_urbs);
 824         DEBUGFS_ADD(usb_rx_work_urbs);
 825
 826         DEBUGFS_ADD(tx_total_queued);
 827         DEBUGFS_ADD(tx_total_pending);
 828         DEBUGFS_ADD(tx_dropped);
 829         DEBUGFS_ADD(tx_stuck);
 830         DEBUGFS_ADD(tx_ampdu_upload);
 831         DEBUGFS_ADD(tx_ampdu_scheduler);
 832         DEBUGFS_ADD(tx_ampdu_list_len);
 833
 834         DEBUGFS_ADD(rx_dropped);
 835         DEBUGFS_ADD(sniffer_enabled);
 836         DEBUGFS_ADD(rx_software_decryption);
 837
 838         DEBUGFS_ADD(mem_usage);
 839         DEBUGFS_ADD(qos_stat);
 840         DEBUGFS_ADD(sta_psm);
 841         DEBUGFS_ADD(ampdu_state);
 842
 843         DEBUGFS_ADD(hw_tx_tally);
 844         DEBUGFS_ADD(hw_rx_tally);
 845         DEBUGFS_ADD(hw_phy_errors);
 846         DEBUGFS_ADD(phy_noise);
 847
 848         DEBUGFS_ADD(hw_wlan_queue);
 849         DEBUGFS_ADD(hw_pta_queue);
 850         DEBUGFS_ADD(hw_ampdu_info);
 851
 852         DEBUGFS_ADD(ampdu_density);
 853         DEBUGFS_ADD(ampdu_factor);
 854
 855         DEBUGFS_ADD(tx_janitor_last_run);
 856
 857         DEBUGFS_ADD(tx_status_0);
 858         DEBUGFS_ADD(tx_status_1);
 859         DEBUGFS_ADD(tx_status_2);
 860         DEBUGFS_ADD(tx_status_3);
 861
 862         DEBUGFS_ADD(tx_pending_0);
 863         DEBUGFS_ADD(tx_pending_1);
 864         DEBUGFS_ADD(tx_pending_2);
 865         DEBUGFS_ADD(tx_pending_3);
 866
 867         DEBUGFS_ADD(hw_ioread32);
 868         DEBUGFS_ADD(hw_iowrite32);
 869         DEBUGFS_ADD(bug);
 870
 871         DEBUGFS_ADD(erp);
 872
 873         DEBUGFS_ADD(vif_dump);
 874
 875         DEBUGFS_ADD(beacon_int);
 876         DEBUGFS_ADD(pretbtt);
 877
 878 #undef DEBUGFS_ADD
 879 }
 880
 881 void carl9170_debugfs_unregister(struct ar9170 *ar)
 882 {
 883         debugfs_remove_recursive(ar->debug_dir);
 884 }