drivers/net/wireless/rt2x00/rt2x00debug.c

   1 /*
   2         Copyright (C) 2004 - 2009 rt2x00 SourceForge Project
   3         <http://rt2x00.serialmonkey.com>
   4
   5         This program is free software; you can redistribute it and/or modify
   6         it under the terms of the GNU General Public License as published by
   7         the Free Software Foundation; either version 2 of the License, or
   8         (at your option) any later version.
   9
  10         This program is distributed in the hope that it will be useful,
  11         but WITHOUT ANY WARRANTY; without even the implied warranty of
  12         MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13         GNU General Public License for more details.
  14
  15         You should have received a copy of the GNU General Public License
  16         along with this program; if not, write to the
  17         Free Software Foundation, Inc.,
  18         59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19  */
  20
  21 /*
  22         Module: rt2x00lib
  23         Abstract: rt2x00 debugfs specific routines.
  24  */
  25
  26 #include <linux/debugfs.h>
  27 #include <linux/kernel.h>
  28 #include <linux/module.h>
  29 #include <linux/poll.h>
  30 #include <linux/sched.h>
  31 #include <linux/uaccess.h>
  32
  33 #include "rt2x00.h"
  34 #include "rt2x00lib.h"
  35 #include "rt2x00dump.h"
  36
  37 #define MAX_LINE_LENGTH 64
  38
  39 struct rt2x00debug_crypto {
  40         unsigned long success;
  41         unsigned long icv_error;
  42         unsigned long mic_error;
  43         unsigned long key_error;
  44 };
  45
  46 struct rt2x00debug_intf {
  47         /*
  48          * Pointer to driver structure where
  49          * this debugfs entry belongs to.
  50          */
  51         struct rt2x00_dev *rt2x00dev;
  52
  53         /*
  54          * Reference to the rt2x00debug structure
  55          * which can be used to communicate with
  56          * the registers.
  57          */
  58         const struct rt2x00debug *debug;
  59
  60         /*
  61          * Debugfs entries for:
  62          * - driver folder
  63          *   - driver file
  64          *   - chipset file
  65          *   - device flags file
  66          *   - register folder
  67          *     - csr offset/value files
  68          *     - eeprom offset/value files
  69          *     - bbp offset/value files
  70          *     - rf offset/value files
  71          *   - queue folder
  72          *     - frame dump file
  73          *     - queue stats file
  74          *     - crypto stats file
  75          */
  76         struct dentry *driver_folder;
  77         struct dentry *driver_entry;
  78         struct dentry *chipset_entry;
  79         struct dentry *dev_flags;
  80         struct dentry *register_folder;
  81         struct dentry *csr_off_entry;
  82         struct dentry *csr_val_entry;
  83         struct dentry *eeprom_off_entry;
  84         struct dentry *eeprom_val_entry;
  85         struct dentry *bbp_off_entry;
  86         struct dentry *bbp_val_entry;
  87         struct dentry *rf_off_entry;
  88         struct dentry *rf_val_entry;
  89         struct dentry *queue_folder;
  90         struct dentry *queue_frame_dump_entry;
  91         struct dentry *queue_stats_entry;
  92         struct dentry *crypto_stats_entry;
  93
  94         /*
  95          * The frame dump file only allows a single reader,
  96          * so we need to store the current state here.
  97          */
  98         unsigned long frame_dump_flags;
  99 #define FRAME_DUMP_FILE_OPEN    1
 100
 101         /*
 102          * We queue each frame before dumping it to the user,
 103          * per read command we will pass a single skb structure
 104          * so we should be prepared to queue multiple sk buffers
 105          * before sending it to userspace.
 106          */
 107         struct sk_buff_head frame_dump_skbqueue;
 108         wait_queue_head_t frame_dump_waitqueue;
 109
 110         /*
 111          * HW crypto statistics.
 112          * All statistics are stored seperately per cipher type.
 113          */
 114         struct rt2x00debug_crypto crypto_stats[CIPHER_MAX];
 115
 116         /*
 117          * Driver and chipset files will use a data buffer
 118          * that has been created in advance. This will simplify
 119          * the code since we can use the debugfs functions.
 120          */
 121         struct debugfs_blob_wrapper driver_blob;
 122         struct debugfs_blob_wrapper chipset_blob;
 123
 124         /*
 125          * Requested offset for each register type.
 126          */
 127         unsigned int offset_csr;
 128         unsigned int offset_eeprom;
 129         unsigned int offset_bbp;
 130         unsigned int offset_rf;
 131 };
 132
 133 void rt2x00debug_update_crypto(struct rt2x00_dev *rt2x00dev,
 134                                struct rxdone_entry_desc *rxdesc)
 135 {
 136         struct rt2x00debug_intf *intf = rt2x00dev->debugfs_intf;
 137         enum cipher cipher = rxdesc->cipher;
 138         enum rx_crypto status = rxdesc->cipher_status;
 139
 140         if (cipher == CIPHER_TKIP_NO_MIC)
 141                 cipher = CIPHER_TKIP;
 142         if (cipher == CIPHER_NONE || cipher >= CIPHER_MAX)
 143                 return;
 144
 145         /* Remove CIPHER_NONE index */
 146         cipher--;
 147
 148         intf->crypto_stats[cipher].success += (status == RX_CRYPTO_SUCCESS);
 149         intf->crypto_stats[cipher].icv_error += (status == RX_CRYPTO_FAIL_ICV);
 150         intf->crypto_stats[cipher].mic_error += (status == RX_CRYPTO_FAIL_MIC);
 151         intf->crypto_stats[cipher].key_error += (status == RX_CRYPTO_FAIL_KEY);
 152 }
 153
 154 void rt2x00debug_dump_frame(struct rt2x00_dev *rt2x00dev,
 155                             enum rt2x00_dump_type type, struct sk_buff *skb)
 156 {
 157         struct rt2x00debug_intf *intf = rt2x00dev->debugfs_intf;
 158         struct skb_frame_desc *desc = get_skb_frame_desc(skb);
 159         struct sk_buff *skbcopy;
 160         struct rt2x00dump_hdr *dump_hdr;
 161         struct timeval timestamp;
 162
 163         do_gettimeofday(&timestamp);
 164
 165         if (!test_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags))
 166                 return;
 167
 168         if (skb_queue_len(&intf->frame_dump_skbqueue) > 20) {
 169                 DEBUG(rt2x00dev, "txrx dump queue length exceeded.\n");
 170                 return;
 171         }
 172
 173         skbcopy = alloc_skb(sizeof(*dump_hdr) + desc->desc_len + skb->len,
 174                             GFP_ATOMIC);
 175         if (!skbcopy) {
 176                 DEBUG(rt2x00dev, "Failed to copy skb for dump.\n");
 177                 return;
 178         }
 179
 180         dump_hdr = (struct rt2x00dump_hdr *)skb_put(skbcopy, sizeof(*dump_hdr));
 181         dump_hdr->version = cpu_to_le32(DUMP_HEADER_VERSION);
 182         dump_hdr->header_length = cpu_to_le32(sizeof(*dump_hdr));
 183         dump_hdr->desc_length = cpu_to_le32(desc->desc_len);
 184         dump_hdr->data_length = cpu_to_le32(skb->len);
 185         dump_hdr->chip_rt = cpu_to_le16(rt2x00dev->chip.rt);
 186         dump_hdr->chip_rf = cpu_to_le16(rt2x00dev->chip.rf);
 187         dump_hdr->chip_rev = cpu_to_le32(rt2x00dev->chip.rev);
 188         dump_hdr->type = cpu_to_le16(type);
 189         dump_hdr->queue_index = desc->entry->queue->qid;
 190         dump_hdr->entry_index = desc->entry->entry_idx;
 191         dump_hdr->timestamp_sec = cpu_to_le32(timestamp.tv_sec);
 192         dump_hdr->timestamp_usec = cpu_to_le32(timestamp.tv_usec);
 193
 194         memcpy(skb_put(skbcopy, desc->desc_len), desc->desc, desc->desc_len);
 195         memcpy(skb_put(skbcopy, skb->len), skb->data, skb->len);
 196
 197         skb_queue_tail(&intf->frame_dump_skbqueue, skbcopy);
 198         wake_up_interruptible(&intf->frame_dump_waitqueue);
 199
 200         /*
 201          * Verify that the file has not been closed while we were working.
 202          */
 203         if (!test_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags))
 204                 skb_queue_purge(&intf->frame_dump_skbqueue);
 205 }
 206
 207 static int rt2x00debug_file_open(struct inode *inode, struct file *file)
 208 {
 209         struct rt2x00debug_intf *intf = inode->i_private;
 210
 211         file->private_data = inode->i_private;
 212
 213         if (!try_module_get(intf->debug->owner))
 214                 return -EBUSY;
 215
 216         return 0;
 217 }
 218
 219 static int rt2x00debug_file_release(struct inode *inode, struct file *file)
 220 {
 221         struct rt2x00debug_intf *intf = file->private_data;
 222
 223         module_put(intf->debug->owner);
 224
 225         return 0;
 226 }
 227
 228 static int rt2x00debug_open_queue_dump(struct inode *inode, struct file *file)
 229 {
 230         struct rt2x00debug_intf *intf = inode->i_private;
 231         int retval;
 232
 233         retval = rt2x00debug_file_open(inode, file);
 234         if (retval)
 235                 return retval;
 236
 237         if (test_and_set_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags)) {
 238                 rt2x00debug_file_release(inode, file);
 239                 return -EBUSY;
 240         }
 241
 242         return 0;
 243 }
 244
 245 static int rt2x00debug_release_queue_dump(struct inode *inode, struct file *file)
 246 {
 247         struct rt2x00debug_intf *intf = inode->i_private;
 248
 249         skb_queue_purge(&intf->frame_dump_skbqueue);
 250
 251         clear_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags);
 252
 253         return rt2x00debug_file_release(inode, file);
 254 }
 255
 256 static ssize_t rt2x00debug_read_queue_dump(struct file *file,
 257                                            char __user *buf,
 258                                            size_t length,
 259                                            loff_t *offset)
 260 {
 261         struct rt2x00debug_intf *intf = file->private_data;
 262         struct sk_buff *skb;
 263         size_t status;
 264         int retval;
 265
 266         if (file->f_flags & O_NONBLOCK)
 267                 return -EAGAIN;
 268
 269         retval =
 270             wait_event_interruptible(intf->frame_dump_waitqueue,
 271                                      (skb =
 272                                      skb_dequeue(&intf->frame_dump_skbqueue)));
 273         if (retval)
 274                 return retval;
 275
 276         status = min((size_t)skb->len, length);
 277         if (copy_to_user(buf, skb->data, status)) {
 278                 status = -EFAULT;
 279                 goto exit;
 280         }
 281
 282         *offset += status;
 283
 284 exit:
 285         kfree_skb(skb);
 286
 287         return status;
 288 }
 289
 290 static unsigned int rt2x00debug_poll_queue_dump(struct file *file,
 291                                                 poll_table *wait)
 292 {
 293         struct rt2x00debug_intf *intf = file->private_data;
 294
 295         poll_wait(file, &intf->frame_dump_waitqueue, wait);
 296
 297         if (!skb_queue_empty(&intf->frame_dump_skbqueue))
 298                 return POLLOUT | POLLWRNORM;
 299
 300         return 0;
 301 }
 302
 303 static const struct file_operations rt2x00debug_fop_queue_dump = {
 304         .owner          = THIS_MODULE,
 305         .read           = rt2x00debug_read_queue_dump,
 306         .poll           = rt2x00debug_poll_queue_dump,
 307         .open           = rt2x00debug_open_queue_dump,
 308         .release        = rt2x00debug_release_queue_dump,
 309 };
 310
 311 static ssize_t rt2x00debug_read_queue_stats(struct file *file,
 312                                             char __user *buf,
 313                                             size_t length,
 314                                             loff_t *offset)
 315 {
 316         struct rt2x00debug_intf *intf = file->private_data;
 317         struct data_queue *queue;
 318         unsigned long irqflags;
 319         unsigned int lines = 1 + intf->rt2x00dev->data_queues;
 320         size_t size;
 321         char *data;
 322         char *temp;
 323
 324         if (*offset)
 325                 return 0;
 326
 327         data = kzalloc(lines * MAX_LINE_LENGTH, GFP_KERNEL);
 328         if (!data)
 329                 return -ENOMEM;
 330
 331         temp = data +
 332             sprintf(data, "qid\tcount\tlimit\tlength\tindex\tdone\tcrypto\n");
 333
 334         queue_for_each(intf->rt2x00dev, queue) {
 335                 spin_lock_irqsave(&queue->lock, irqflags);
 336
 337                 temp += sprintf(temp, "%d\t%d\t%d\t%d\t%d\t%d\t%d\n", queue->qid,
 338                                 queue->count, queue->limit, queue->length,
 339                                 queue->index[Q_INDEX],
 340                                 queue->index[Q_INDEX_DONE],
 341                                 queue->index[Q_INDEX_CRYPTO]);
 342
 343                 spin_unlock_irqrestore(&queue->lock, irqflags);
 344         }
 345
 346         size = strlen(data);
 347         size = min(size, length);
 348
 349         if (copy_to_user(buf, data, size)) {
 350                 kfree(data);
 351                 return -EFAULT;
 352         }
 353
 354         kfree(data);
 355
 356         *offset += size;
 357         return size;
 358 }
 359
 360 static const struct file_operations rt2x00debug_fop_queue_stats = {
 361         .owner          = THIS_MODULE,
 362         .read           = rt2x00debug_read_queue_stats,
 363         .open           = rt2x00debug_file_open,
 364         .release        = rt2x00debug_file_release,
 365 };
 366
 367 #ifdef CONFIG_RT2X00_LIB_CRYPTO
 368 static ssize_t rt2x00debug_read_crypto_stats(struct file *file,
 369                                              char __user *buf,
 370                                              size_t length,
 371                                              loff_t *offset)
 372 {
 373         struct rt2x00debug_intf *intf = file->private_data;
 374         char *name[] = { "WEP64", "WEP128", "TKIP", "AES" };
 375         char *data;
 376         char *temp;
 377         size_t size;
 378         unsigned int i;
 379
 380         if (*offset)
 381                 return 0;
 382
 383         data = kzalloc((1 + CIPHER_MAX) * MAX_LINE_LENGTH, GFP_KERNEL);
 384         if (!data)
 385                 return -ENOMEM;
 386
 387         temp = data;
 388         temp += sprintf(data, "cipher\tsuccess\ticv err\tmic err\tkey err\n");
 389
 390         for (i = 0; i < CIPHER_MAX; i++) {
 391                 temp += sprintf(temp, "%s\t%lu\t%lu\t%lu\t%lu\n", name[i],
 392                                 intf->crypto_stats[i].success,
 393                                 intf->crypto_stats[i].icv_error,
 394                                 intf->crypto_stats[i].mic_error,
 395                                 intf->crypto_stats[i].key_error);
 396         }
 397
 398         size = strlen(data);
 399         size = min(size, length);
 400
 401         if (copy_to_user(buf, data, size)) {
 402                 kfree(data);
 403                 return -EFAULT;
 404         }
 405
 406         kfree(data);
 407
 408         *offset += size;
 409         return size;
 410 }
 411
 412 static const struct file_operations rt2x00debug_fop_crypto_stats = {
 413         .owner          = THIS_MODULE,
 414         .read           = rt2x00debug_read_crypto_stats,
 415         .open           = rt2x00debug_file_open,
 416         .release        = rt2x00debug_file_release,
 417 };
 418 #endif
 419
 420 #define RT2X00DEBUGFS_OPS_READ(__name, __format, __type)        \
 421 static ssize_t rt2x00debug_read_##__name(struct file *file,     \
 422                                          char __user *buf,      \
 423                                          size_t length,         \
 424                                          loff_t *offset)        \
 425 {                                                               \
 426         struct rt2x00debug_intf *intf = file->private_data;     \
 427         const struct rt2x00debug *debug = intf->debug;          \
 428         char line[16];                                          \
 429         size_t size;                                            \
 430         unsigned int index = intf->offset_##__name;             \
 431         __type value;                                           \
 432                                                                 \
 433         if (*offset)                                            \
 434                 return 0;                                       \
 435                                                                 \
 436         if (index >= debug->__name.word_count)                  \
 437                 return -EINVAL;                                 \
 438                                                                 \
 439         index += (debug->__name.word_base /                     \
 440                   debug->__name.word_size);                     \
 441                                                                 \
 442         if (debug->__name.flags & RT2X00DEBUGFS_OFFSET)         \
 443                 index *= debug->__name.word_size;               \
 444                                                                 \
 445         debug->__name.read(intf->rt2x00dev, index, &value);     \
 446                                                                 \
 447         size = sprintf(line, __format, value);                  \
 448                                                                 \
 449         if (copy_to_user(buf, line, size))                      \
 450                 return -EFAULT;                                 \
 451                                                                 \
 452         *offset += size;                                        \
 453         return size;                                            \
 454 }
 455
 456 #define RT2X00DEBUGFS_OPS_WRITE(__name, __type)                 \
 457 static ssize_t rt2x00debug_write_##__name(struct file *file,    \
 458                                           const char __user *buf,\
 459                                           size_t length,        \
 460                                           loff_t *offset)       \
 461 {                                                               \
 462         struct rt2x00debug_intf *intf = file->private_data;     \
 463         const struct rt2x00debug *debug = intf->debug;          \
 464         char line[16];                                          \
 465         size_t size;                                            \
 466         unsigned int index = intf->offset_##__name;             \
 467         __type value;                                           \
 468                                                                 \
 469         if (*offset)                                            \
 470                 return 0;                                       \
 471                                                                 \
 472         if (index >= debug->__name.word_count)                  \
 473                 return -EINVAL;                                 \
 474                                                                 \
 475         if (copy_from_user(line, buf, length))                  \
 476                 return -EFAULT;                                 \
 477                                                                 \
 478         size = strlen(line);                                    \
 479         value = simple_strtoul(line, NULL, 0);                  \
 480                                                                 \
 481         index += (debug->__name.word_base /                     \
 482                   debug->__name.word_size);                     \
 483                                                                 \
 484         if (debug->__name.flags & RT2X00DEBUGFS_OFFSET)         \
 485                 index *= debug->__name.word_size;               \
 486                                                                 \
 487         debug->__name.write(intf->rt2x00dev, index, value);     \
 488                                                                 \
 489         *offset += size;                                        \
 490         return size;                                            \
 491 }
 492
 493 #define RT2X00DEBUGFS_OPS(__name, __format, __type)             \
 494 RT2X00DEBUGFS_OPS_READ(__name, __format, __type);               \
 495 RT2X00DEBUGFS_OPS_WRITE(__name, __type);                        \
 496                                                                 \
 497 static const struct file_operations rt2x00debug_fop_##__name = {\
 498         .owner          = THIS_MODULE,                          \
 499         .read           = rt2x00debug_read_##__name,            \
 500         .write          = rt2x00debug_write_##__name,           \
 501         .open           = rt2x00debug_file_open,                \
 502         .release        = rt2x00debug_file_release,             \
 503 };
 504
 505 RT2X00DEBUGFS_OPS(csr, "0x%.8x\n", u32);
 506 RT2X00DEBUGFS_OPS(eeprom, "0x%.4x\n", u16);
 507 RT2X00DEBUGFS_OPS(bbp, "0x%.2x\n", u8);
 508 RT2X00DEBUGFS_OPS(rf, "0x%.8x\n", u32);
 509
 510 static ssize_t rt2x00debug_read_dev_flags(struct file *file,
 511                                           char __user *buf,
 512                                           size_t length,
 513                                           loff_t *offset)
 514 {
 515         struct rt2x00debug_intf *intf = file->private_data;
 516         char line[16];
 517         size_t size;
 518
 519         if (*offset)
 520                 return 0;
 521
 522         size = sprintf(line, "0x%.8x\n", (unsigned int)intf->rt2x00dev->flags);
 523
 524         if (copy_to_user(buf, line, size))
 525                 return -EFAULT;
 526
 527         *offset += size;
 528         return size;
 529 }
 530
 531 static const struct file_operations rt2x00debug_fop_dev_flags = {
 532         .owner          = THIS_MODULE,
 533         .read           = rt2x00debug_read_dev_flags,
 534         .open           = rt2x00debug_file_open,
 535         .release        = rt2x00debug_file_release,
 536 };
 537
 538 static struct dentry *rt2x00debug_create_file_driver(const char *name,
 539                                                      struct rt2x00debug_intf
 540                                                      *intf,
 541                                                      struct debugfs_blob_wrapper
 542                                                      *blob)
 543 {
 544         char *data;
 545
 546         data = kzalloc(3 * MAX_LINE_LENGTH, GFP_KERNEL);
 547         if (!data)
 548                 return NULL;
 549
 550         blob->data = data;
 551         data += sprintf(data, "driver:\t%s\n", intf->rt2x00dev->ops->name);
 552         data += sprintf(data, "version:\t%s\n", DRV_VERSION);
 553         data += sprintf(data, "compiled:\t%s %s\n", __DATE__, __TIME__);
 554         blob->size = strlen(blob->data);
 555
 556         return debugfs_create_blob(name, S_IRUSR, intf->driver_folder, blob);
 557 }
 558
 559 static struct dentry *rt2x00debug_create_file_chipset(const char *name,
 560                                                       struct rt2x00debug_intf
 561                                                       *intf,
 562                                                       struct
 563                                                       debugfs_blob_wrapper
 564                                                       *blob)
 565 {
 566         const struct rt2x00debug *debug = intf->debug;
 567         char *data;
 568
 569         data = kzalloc(8 * MAX_LINE_LENGTH, GFP_KERNEL);
 570         if (!data)
 571                 return NULL;
 572
 573         blob->data = data;
 574         data += sprintf(data, "rt chip:\t%04x\n", intf->rt2x00dev->chip.rt);
 575         data += sprintf(data, "rf chip:\t%04x\n", intf->rt2x00dev->chip.rf);
 576         data += sprintf(data, "revision:\t%08x\n", intf->rt2x00dev->chip.rev);
 577         data += sprintf(data, "\n");
 578         data += sprintf(data, "register\tbase\twords\twordsize\n");
 579         data += sprintf(data, "csr\t%d\t%d\t%d\n",
 580                         debug->csr.word_base,
 581                         debug->csr.word_count,
 582                         debug->csr.word_size);
 583         data += sprintf(data, "eeprom\t%d\t%d\t%d\n",
 584                         debug->eeprom.word_base,
 585                         debug->eeprom.word_count,
 586                         debug->eeprom.word_size);
 587         data += sprintf(data, "bbp\t%d\t%d\t%d\n",
 588                         debug->bbp.word_base,
 589                         debug->bbp.word_count,
 590                         debug->bbp.word_size);
 591         data += sprintf(data, "rf\t%d\t%d\t%d\n",
 592                         debug->rf.word_base,
 593                         debug->rf.word_count,
 594                         debug->rf.word_size);
 595         blob->size = strlen(blob->data);
 596
 597         return debugfs_create_blob(name, S_IRUSR, intf->driver_folder, blob);
 598 }
 599
 600 void rt2x00debug_register(struct rt2x00_dev *rt2x00dev)
 601 {
 602         const struct rt2x00debug *debug = rt2x00dev->ops->debugfs;
 603         struct rt2x00debug_intf *intf;
 604
 605         intf = kzalloc(sizeof(struct rt2x00debug_intf), GFP_KERNEL);
 606         if (!intf) {
 607                 ERROR(rt2x00dev, "Failed to allocate debug handler.\n");
 608                 return;
 609         }
 610
 611         intf->debug = debug;
 612         intf->rt2x00dev = rt2x00dev;
 613         rt2x00dev->debugfs_intf = intf;
 614
 615         intf->driver_folder =
 616             debugfs_create_dir(intf->rt2x00dev->ops->name,
 617                                rt2x00dev->hw->wiphy->debugfsdir);
 618         if (IS_ERR(intf->driver_folder) || !intf->driver_folder)
 619                 goto exit;
 620
 621         intf->driver_entry =
 622             rt2x00debug_create_file_driver("driver", intf, &intf->driver_blob);
 623         if (IS_ERR(intf->driver_entry) || !intf->driver_entry)
 624                 goto exit;
 625
 626         intf->chipset_entry =
 627             rt2x00debug_create_file_chipset("chipset",
 628                                             intf, &intf->chipset_blob);
 629         if (IS_ERR(intf->chipset_entry) || !intf->chipset_entry)
 630                 goto exit;
 631
 632         intf->dev_flags = debugfs_create_file("dev_flags", S_IRUSR,
 633                                               intf->driver_folder, intf,
 634                                               &rt2x00debug_fop_dev_flags);
 635         if (IS_ERR(intf->dev_flags) || !intf->dev_flags)
 636                 goto exit;
 637
 638         intf->register_folder =
 639             debugfs_create_dir("register", intf->driver_folder);
 640         if (IS_ERR(intf->register_folder) || !intf->register_folder)
 641                 goto exit;
 642
 643 #define RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(__intf, __name)     \
 644 ({                                                              \
 645         (__intf)->__name##_off_entry =                          \
 646             debugfs_create_u32(__stringify(__name) "_offset",   \
 647                                S_IRUSR | S_IWUSR,               \
 648                                (__intf)->register_folder,       \
 649                                &(__intf)->offset_##__name);     \
 650         if (IS_ERR((__intf)->__name##_off_entry)                \
 651                         || !(__intf)->__name##_off_entry)       \
 652                 goto exit;                                      \
 653                                                                 \
 654         (__intf)->__name##_val_entry =                          \
 655             debugfs_create_file(__stringify(__name) "_value",   \
 656                                 S_IRUSR | S_IWUSR,              \
 657                                 (__intf)->register_folder,      \
 658                                 (__intf), &rt2x00debug_fop_##__name);\
 659         if (IS_ERR((__intf)->__name##_val_entry)                \
 660                         || !(__intf)->__name##_val_entry)       \
 661                 goto exit;                                      \
 662 })
 663
 664         RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, csr);
 665         RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, eeprom);
 666         RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, bbp);
 667         RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, rf);
 668
 669 #undef RT2X00DEBUGFS_CREATE_REGISTER_ENTRY
 670
 671         intf->queue_folder =
 672             debugfs_create_dir("queue", intf->driver_folder);
 673         if (IS_ERR(intf->queue_folder) || !intf->queue_folder)
 674                 goto exit;
 675
 676         intf->queue_frame_dump_entry =
 677             debugfs_create_file("dump", S_IRUSR, intf->queue_folder,
 678                                 intf, &rt2x00debug_fop_queue_dump);
 679         if (IS_ERR(intf->queue_frame_dump_entry)
 680                 || !intf->queue_frame_dump_entry)
 681                 goto exit;
 682
 683         skb_queue_head_init(&intf->frame_dump_skbqueue);
 684         init_waitqueue_head(&intf->frame_dump_waitqueue);
 685
 686         intf->queue_stats_entry =
 687             debugfs_create_file("queue", S_IRUSR, intf->queue_folder,
 688                                 intf, &rt2x00debug_fop_queue_stats);
 689
 690 #ifdef CONFIG_RT2X00_LIB_CRYPTO
 691         if (test_bit(CONFIG_SUPPORT_HW_CRYPTO, &rt2x00dev->flags))
 692                 intf->crypto_stats_entry =
 693                     debugfs_create_file("crypto", S_IRUGO, intf->queue_folder,
 694                                         intf, &rt2x00debug_fop_crypto_stats);
 695 #endif
 696
 697         return;
 698
 699 exit:
 700         rt2x00debug_deregister(rt2x00dev);
 701         ERROR(rt2x00dev, "Failed to register debug handler.\n");
 702
 703         return;
 704 }
 705
 706 void rt2x00debug_deregister(struct rt2x00_dev *rt2x00dev)
 707 {
 708         struct rt2x00debug_intf *intf = rt2x00dev->debugfs_intf;
 709
 710         if (unlikely(!intf))
 711                 return;
 712
 713         skb_queue_purge(&intf->frame_dump_skbqueue);
 714
 715 #ifdef CONFIG_RT2X00_LIB_CRYPTO
 716         debugfs_remove(intf->crypto_stats_entry);
 717 #endif
 718         debugfs_remove(intf->queue_stats_entry);
 719         debugfs_remove(intf->queue_frame_dump_entry);
 720         debugfs_remove(intf->queue_folder);
 721         debugfs_remove(intf->rf_val_entry);
 722         debugfs_remove(intf->rf_off_entry);
 723         debugfs_remove(intf->bbp_val_entry);
 724         debugfs_remove(intf->bbp_off_entry);
 725         debugfs_remove(intf->eeprom_val_entry);
 726         debugfs_remove(intf->eeprom_off_entry);
 727         debugfs_remove(intf->csr_val_entry);
 728         debugfs_remove(intf->csr_off_entry);
 729         debugfs_remove(intf->register_folder);
 730         debugfs_remove(intf->dev_flags);
 731         debugfs_remove(intf->chipset_entry);
 732         debugfs_remove(intf->driver_entry);
 733         debugfs_remove(intf->driver_folder);
 734         kfree(intf->chipset_blob.data);
 735         kfree(intf->driver_blob.data);
 736         kfree(intf);
 737
 738         rt2x00dev->debugfs_intf = NULL;
 739 }