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