SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/net/wireless/rt2x00/rt2x00debug.c

   1 /*
   2         Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
   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/slab.h>
  32 #include <linux/uaccess.h>
  33
  34 #include "rt2x00.h"
  35 #include "rt2x00lib.h"
  36 #include "rt2x00dump.h"
  37
  38 #define MAX_LINE_LENGTH 64
  39
  40 struct rt2x00debug_crypto {
  41         unsigned long success;
  42         unsigned long icv_error;
  43         unsigned long mic_error;
  44         unsigned long key_error;
  45 };
  46
  47 struct rt2x00debug_intf {
  48         /*
  49          * Pointer to driver structure where
  50          * this debugfs entry belongs to.
  51          */
  52         struct rt2x00_dev *rt2x00dev;
  53
  54         /*
  55          * Reference to the rt2x00debug structure
  56          * which can be used to communicate with
  57          * the registers.
  58          */
  59         const struct rt2x00debug *debug;
  60
  61         /*
  62          * Debugfs entries for:
  63          * - driver folder
  64          *   - driver file
  65          *   - chipset file
  66          *   - device flags file
  67          *   - register folder
  68          *     - csr offset/value files
  69          *     - eeprom offset/value files
  70          *     - bbp offset/value files
  71          *     - rf offset/value files
  72          *   - queue folder
  73          *     - frame dump file
  74          *     - queue stats file
  75          *     - crypto stats file
  76          */
  77         struct dentry *driver_folder;
  78         struct dentry *driver_entry;
  79         struct dentry *chipset_entry;
  80         struct dentry *dev_flags;
  81         struct dentry *register_folder;
  82         struct dentry *csr_off_entry;
  83         struct dentry *csr_val_entry;
  84         struct dentry *eeprom_off_entry;
  85         struct dentry *eeprom_val_entry;
  86         struct dentry *bbp_off_entry;
  87         struct dentry *bbp_val_entry;
  88         struct dentry *rf_off_entry;
  89         struct dentry *rf_val_entry;
  90         struct dentry *queue_folder;
  91         struct dentry *queue_frame_dump_entry;
  92         struct dentry *queue_stats_entry;
  93         struct dentry *crypto_stats_entry;
  94
  95         /*
  96          * The frame dump file only allows a single reader,
  97          * so we need to store the current state here.
  98          */
  99         unsigned long frame_dump_flags;
 100 #define FRAME_DUMP_FILE_OPEN    1
 101
 102         /*
 103          * We queue each frame before dumping it to the user,
 104          * per read command we will pass a single skb structure
 105          * so we should be prepared to queue multiple sk buffers
 106          * before sending it to userspace.
 107          */
 108         struct sk_buff_head frame_dump_skbqueue;
 109         wait_queue_head_t frame_dump_waitqueue;
 110
 111         /*
 112          * HW crypto statistics.
 113          * All statistics are stored separately per cipher type.
 114          */
 115         struct rt2x00debug_crypto crypto_stats[CIPHER_MAX];
 116
 117         /*
 118          * Driver and chipset files will use a data buffer
 119          * that has been created in advance. This will simplify
 120          * the code since we can use the debugfs functions.
 121          */
 122         struct debugfs_blob_wrapper driver_blob;
 123         struct debugfs_blob_wrapper chipset_blob;
 124
 125         /*
 126          * Requested offset for each register type.
 127          */
 128         unsigned int offset_csr;
 129         unsigned int offset_eeprom;
 130         unsigned int offset_bbp;
 131         unsigned int offset_rf;
 132 };
 133
 134 void rt2x00debug_update_crypto(struct rt2x00_dev *rt2x00dev,
 135                                struct rxdone_entry_desc *rxdesc)
 136 {
 137         struct rt2x00debug_intf *intf = rt2x00dev->debugfs_intf;
 138         enum cipher cipher = rxdesc->cipher;
 139         enum rx_crypto status = rxdesc->cipher_status;
 140
 141         if (cipher == CIPHER_TKIP_NO_MIC)
 142                 cipher = CIPHER_TKIP;
 143         if (cipher == CIPHER_NONE || cipher >= CIPHER_MAX)
 144                 return;
 145
 146         /* Remove CIPHER_NONE index */
 147         cipher--;
 148
 149         intf->crypto_stats[cipher].success += (status == RX_CRYPTO_SUCCESS);
 150         intf->crypto_stats[cipher].icv_error += (status == RX_CRYPTO_FAIL_ICV);
 151         intf->crypto_stats[cipher].mic_error += (status == RX_CRYPTO_FAIL_MIC);
 152         intf->crypto_stats[cipher].key_error += (status == RX_CRYPTO_FAIL_KEY);
 153 }
 154
 155 void rt2x00debug_dump_frame(struct rt2x00_dev *rt2x00dev,
 156                             enum rt2x00_dump_type type, struct sk_buff *skb)
 157 {
 158         struct rt2x00debug_intf *intf = rt2x00dev->debugfs_intf;
 159         struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb);
 160         struct sk_buff *skbcopy;
 161         struct rt2x00dump_hdr *dump_hdr;
 162         struct timeval timestamp;
 163         u32 data_len;
 164
 165         do_gettimeofday(&timestamp);
 166
 167         if (!test_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags))
 168                 return;
 169
 170         if (skb_queue_len(&intf->frame_dump_skbqueue) > 20) {
 171                 DEBUG(rt2x00dev, "txrx dump queue length exceeded.\n");
 172                 return;
 173         }
 174
 175         data_len = skb->len;
 176         if (skbdesc->flags & SKBDESC_DESC_IN_SKB)
 177                 data_len -= skbdesc->desc_len;
 178
 179         skbcopy = alloc_skb(sizeof(*dump_hdr) + skbdesc->desc_len + data_len,
 180                             GFP_ATOMIC);
 181         if (!skbcopy) {
 182                 DEBUG(rt2x00dev, "Failed to copy skb for dump.\n");
 183                 return;
 184         }
 185
 186         dump_hdr = (struct rt2x00dump_hdr *)skb_put(skbcopy, sizeof(*dump_hdr));
 187         dump_hdr->version = cpu_to_le32(DUMP_HEADER_VERSION);
 188         dump_hdr->header_length = cpu_to_le32(sizeof(*dump_hdr));
 189         dump_hdr->desc_length = cpu_to_le32(skbdesc->desc_len);
 190         dump_hdr->data_length = cpu_to_le32(data_len);
 191         dump_hdr->chip_rt = cpu_to_le16(rt2x00dev->chip.rt);
 192         dump_hdr->chip_rf = cpu_to_le16(rt2x00dev->chip.rf);
 193         dump_hdr->chip_rev = cpu_to_le16(rt2x00dev->chip.rev);
 194         dump_hdr->type = cpu_to_le16(type);
 195         dump_hdr->queue_index = skbdesc->entry->queue->qid;
 196         dump_hdr->entry_index = skbdesc->entry->entry_idx;
 197         dump_hdr->timestamp_sec = cpu_to_le32(timestamp.tv_sec);
 198         dump_hdr->timestamp_usec = cpu_to_le32(timestamp.tv_usec);
 199
 200         if (!(skbdesc->flags & SKBDESC_DESC_IN_SKB))
 201                 memcpy(skb_put(skbcopy, skbdesc->desc_len), skbdesc->desc,
 202                        skbdesc->desc_len);
 203         memcpy(skb_put(skbcopy, skb->len), skb->data, skb->len);
 204
 205         skb_queue_tail(&intf->frame_dump_skbqueue, skbcopy);
 206         wake_up_interruptible(&intf->frame_dump_waitqueue);
 207
 208         /*
 209          * Verify that the file has not been closed while we were working.
 210          */
 211         if (!test_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags))
 212                 skb_queue_purge(&intf->frame_dump_skbqueue);
 213 }
 214
 215 static int rt2x00debug_file_open(struct inode *inode, struct file *file)
 216 {
 217         struct rt2x00debug_intf *intf = inode->i_private;
 218
 219         file->private_data = inode->i_private;
 220
 221         if (!try_module_get(intf->debug->owner))
 222                 return -EBUSY;
 223
 224         return 0;
 225 }
 226
 227 static int rt2x00debug_file_release(struct inode *inode, struct file *file)
 228 {
 229         struct rt2x00debug_intf *intf = file->private_data;
 230
 231         module_put(intf->debug->owner);
 232
 233         return 0;
 234 }
 235
 236 static int rt2x00debug_open_queue_dump(struct inode *inode, struct file *file)
 237 {
 238         struct rt2x00debug_intf *intf = inode->i_private;
 239         int retval;
 240
 241         retval = rt2x00debug_file_open(inode, file);
 242         if (retval)
 243                 return retval;
 244
 245         if (test_and_set_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags)) {
 246                 rt2x00debug_file_release(inode, file);
 247                 return -EBUSY;
 248         }
 249
 250         return 0;
 251 }
 252
 253 static int rt2x00debug_release_queue_dump(struct inode *inode, struct file *file)
 254 {
 255         struct rt2x00debug_intf *intf = inode->i_private;
 256
 257         skb_queue_purge(&intf->frame_dump_skbqueue);
 258
 259         clear_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags);
 260
 261         return rt2x00debug_file_release(inode, file);
 262 }
 263
 264 static ssize_t rt2x00debug_read_queue_dump(struct file *file,
 265                                            char __user *buf,
 266                                            size_t length,
 267                                            loff_t *offset)
 268 {
 269         struct rt2x00debug_intf *intf = file->private_data;
 270         struct sk_buff *skb;
 271         size_t status;
 272         int retval;
 273
 274         if (file->f_flags & O_NONBLOCK)
 275                 return -EAGAIN;
 276
 277         retval =
 278             wait_event_interruptible(intf->frame_dump_waitqueue,
 279                                      (skb =
 280                                      skb_dequeue(&intf->frame_dump_skbqueue)));
 281         if (retval)
 282                 return retval;
 283
 284         status = min((size_t)skb->len, length);
 285         if (copy_to_user(buf, skb->data, status)) {
 286                 status = -EFAULT;
 287                 goto exit;
 288         }
 289
 290         *offset += status;
 291
 292 exit:
 293         kfree_skb(skb);
 294
 295         return status;
 296 }
 297
 298 static unsigned int rt2x00debug_poll_queue_dump(struct file *file,
 299                                                 poll_table *wait)
 300 {
 301         struct rt2x00debug_intf *intf = file->private_data;
 302
 303         poll_wait(file, &intf->frame_dump_waitqueue, wait);
 304
 305         if (!skb_queue_empty(&intf->frame_dump_skbqueue))
 306                 return POLLOUT | POLLWRNORM;
 307
 308         return 0;
 309 }
 310
 311 static const struct file_operations rt2x00debug_fop_queue_dump = {
 312         .owner          = THIS_MODULE,
 313         .read           = rt2x00debug_read_queue_dump,
 314         .poll           = rt2x00debug_poll_queue_dump,
 315         .open           = rt2x00debug_open_queue_dump,
 316         .release        = rt2x00debug_release_queue_dump,
 317 };
 318
 319 static ssize_t rt2x00debug_read_queue_stats(struct file *file,
 320                                             char __user *buf,
 321                                             size_t length,
 322                                             loff_t *offset)
 323 {
 324         struct rt2x00debug_intf *intf = file->private_data;
 325         struct data_queue *queue;
 326         unsigned long irqflags;
 327         unsigned int lines = 1 + intf->rt2x00dev->data_queues;
 328         size_t size;
 329         char *data;
 330         char *temp;
 331
 332         if (*offset)
 333                 return 0;
 334
 335         data = kzalloc(lines * MAX_LINE_LENGTH, GFP_KERNEL);
 336         if (!data)
 337                 return -ENOMEM;
 338
 339         temp = data +
 340             sprintf(data, "qid\tcount\tlimit\tlength\tindex\tdone\tcrypto\n");
 341
 342         queue_for_each(intf->rt2x00dev, queue) {
 343                 spin_lock_irqsave(&queue->lock, irqflags);
 344
 345                 temp += sprintf(temp, "%d\t%d\t%d\t%d\t%d\t%d\t%d\n", queue->qid,
 346                                 queue->count, queue->limit, queue->length,
 347                                 queue->index[Q_INDEX],
 348                                 queue->index[Q_INDEX_DONE],
 349                                 queue->index[Q_INDEX_CRYPTO]);
 350
 351                 spin_unlock_irqrestore(&queue->lock, irqflags);
 352         }
 353
 354         size = strlen(data);
 355         size = min(size, length);
 356
 357         if (copy_to_user(buf, data, size)) {
 358                 kfree(data);
 359                 return -EFAULT;
 360         }
 361
 362         kfree(data);
 363
 364         *offset += size;
 365         return size;
 366 }
 367
 368 static const struct file_operations rt2x00debug_fop_queue_stats = {
 369         .owner          = THIS_MODULE,
 370         .read           = rt2x00debug_read_queue_stats,
 371         .open           = rt2x00debug_file_open,
 372         .release        = rt2x00debug_file_release,
 373 };
 374
 375 #ifdef CONFIG_RT2X00_LIB_CRYPTO
 376 static ssize_t rt2x00debug_read_crypto_stats(struct file *file,
 377                                              char __user *buf,
 378                                              size_t length,
 379                                              loff_t *offset)
 380 {
 381         struct rt2x00debug_intf *intf = file->private_data;
 382         char *name[] = { "WEP64", "WEP128", "TKIP", "AES" };
 383         char *data;
 384         char *temp;
 385         size_t size;
 386         unsigned int i;
 387
 388         if (*offset)
 389                 return 0;
 390
 391         data = kzalloc((1 + CIPHER_MAX) * MAX_LINE_LENGTH, GFP_KERNEL);
 392         if (!data)
 393                 return -ENOMEM;
 394
 395         temp = data;
 396         temp += sprintf(data, "cipher\tsuccess\ticv err\tmic err\tkey err\n");
 397
 398         for (i = 0; i < CIPHER_MAX; i++) {
 399                 temp += sprintf(temp, "%s\t%lu\t%lu\t%lu\t%lu\n", name[i],
 400                                 intf->crypto_stats[i].success,
 401                                 intf->crypto_stats[i].icv_error,
 402                                 intf->crypto_stats[i].mic_error,
 403                                 intf->crypto_stats[i].key_error);
 404         }
 405
 406         size = strlen(data);
 407         size = min(size, length);
 408
 409         if (copy_to_user(buf, data, size)) {
 410                 kfree(data);
 411                 return -EFAULT;
 412         }
 413
 414         kfree(data);
 415
 416         *offset += size;
 417         return size;
 418 }
 419
 420 static const struct file_operations rt2x00debug_fop_crypto_stats = {
 421         .owner          = THIS_MODULE,
 422         .read           = rt2x00debug_read_crypto_stats,
 423         .open           = rt2x00debug_file_open,
 424         .release        = rt2x00debug_file_release,
 425 };
 426 #endif
 427
 428 #define RT2X00DEBUGFS_OPS_READ(__name, __format, __type)        \
 429 static ssize_t rt2x00debug_read_##__name(struct file *file,     \
 430                                          char __user *buf,      \
 431                                          size_t length,         \
 432                                          loff_t *offset)        \
 433 {                                                               \
 434         struct rt2x00debug_intf *intf = file->private_data;     \
 435         const struct rt2x00debug *debug = intf->debug;          \
 436         char line[16];                                          \
 437         size_t size;                                            \
 438         unsigned int index = intf->offset_##__name;             \
 439         __type value;                                           \
 440                                                                 \
 441         if (*offset)                                            \
 442                 return 0;                                       \
 443                                                                 \
 444         if (index >= debug->__name.word_count)                  \
 445                 return -EINVAL;                                 \
 446                                                                 \
 447         index += (debug->__name.word_base /                     \
 448                   debug->__name.word_size);                     \
 449                                                                 \
 450         if (debug->__name.flags & RT2X00DEBUGFS_OFFSET)         \
 451                 index *= debug->__name.word_size;               \
 452                                                                 \
 453         debug->__name.read(intf->rt2x00dev, index, &value);     \
 454                                                                 \
 455         size = sprintf(line, __format, value);                  \
 456                                                                 \
 457         if (copy_to_user(buf, line, size))                      \
 458                 return -EFAULT;                                 \
 459                                                                 \
 460         *offset += size;                                        \
 461         return size;                                            \
 462 }
 463
 464 #define RT2X00DEBUGFS_OPS_WRITE(__name, __type)                 \
 465 static ssize_t rt2x00debug_write_##__name(struct file *file,    \
 466                                           const char __user *buf,\
 467                                           size_t length,        \
 468                                           loff_t *offset)       \
 469 {                                                               \
 470         struct rt2x00debug_intf *intf = file->private_data;     \
 471         const struct rt2x00debug *debug = intf->debug;          \
 472         char line[16];                                          \
 473         size_t size;                                            \
 474         unsigned int index = intf->offset_##__name;             \
 475         __type value;                                           \
 476                                                                 \
 477         if (*offset)                                            \
 478                 return 0;                                       \
 479                                                                 \
 480         if (index >= debug->__name.word_count)                  \
 481                 return -EINVAL;                                 \
 482                                                                 \
 483         if (copy_from_user(line, buf, length))                  \
 484                 return -EFAULT;                                 \
 485                                                                 \
 486         size = strlen(line);                                    \
 487         value = simple_strtoul(line, NULL, 0);                  \
 488                                                                 \
 489         index += (debug->__name.word_base /                     \
 490                   debug->__name.word_size);                     \
 491                                                                 \
 492         if (debug->__name.flags & RT2X00DEBUGFS_OFFSET)         \
 493                 index *= debug->__name.word_size;               \
 494                                                                 \
 495         debug->__name.write(intf->rt2x00dev, index, value);     \
 496                                                                 \
 497         *offset += size;                                        \
 498         return size;                                            \
 499 }
 500
 501 #define RT2X00DEBUGFS_OPS(__name, __format, __type)             \
 502 RT2X00DEBUGFS_OPS_READ(__name, __format, __type);               \
 503 RT2X00DEBUGFS_OPS_WRITE(__name, __type);                        \
 504                                                                 \
 505 static const struct file_operations rt2x00debug_fop_##__name = {\
 506         .owner          = THIS_MODULE,                          \
 507         .read           = rt2x00debug_read_##__name,            \
 508         .write          = rt2x00debug_write_##__name,           \
 509         .open           = rt2x00debug_file_open,                \
 510         .release        = rt2x00debug_file_release,             \
 511 };
 512
 513 RT2X00DEBUGFS_OPS(csr, "0x%.8x\n", u32);
 514 RT2X00DEBUGFS_OPS(eeprom, "0x%.4x\n", u16);
 515 RT2X00DEBUGFS_OPS(bbp, "0x%.2x\n", u8);
 516 RT2X00DEBUGFS_OPS(rf, "0x%.8x\n", u32);
 517
 518 static ssize_t rt2x00debug_read_dev_flags(struct file *file,
 519                                           char __user *buf,
 520                                           size_t length,
 521                                           loff_t *offset)
 522 {
 523         struct rt2x00debug_intf *intf = file->private_data;
 524         char line[16];
 525         size_t size;
 526
 527         if (*offset)
 528                 return 0;
 529
 530         size = sprintf(line, "0x%.8x\n", (unsigned int)intf->rt2x00dev->flags);
 531
 532         if (copy_to_user(buf, line, size))
 533                 return -EFAULT;
 534
 535         *offset += size;
 536         return size;
 537 }
 538
 539 static const struct file_operations rt2x00debug_fop_dev_flags = {
 540         .owner          = THIS_MODULE,
 541         .read           = rt2x00debug_read_dev_flags,
 542         .open           = rt2x00debug_file_open,
 543         .release        = rt2x00debug_file_release,
 544 };
 545
 546 static struct dentry *rt2x00debug_create_file_driver(const char *name,
 547                                                      struct rt2x00debug_intf
 548                                                      *intf,
 549                                                      struct debugfs_blob_wrapper
 550                                                      *blob)
 551 {
 552         char *data;
 553
 554         data = kzalloc(3 * MAX_LINE_LENGTH, GFP_KERNEL);
 555         if (!data)
 556                 return NULL;
 557
 558         blob->data = data;
 559         data += sprintf(data, "driver:\t%s\n", intf->rt2x00dev->ops->name);
 560         data += sprintf(data, "version:\t%s\n", DRV_VERSION);
 561         data += sprintf(data, "compiled:\t%s %s\n", __DATE__, __TIME__);
 562         blob->size = strlen(blob->data);
 563
 564         return debugfs_create_blob(name, S_IRUSR, intf->driver_folder, blob);
 565 }
 566
 567 static struct dentry *rt2x00debug_create_file_chipset(const char *name,
 568                                                       struct rt2x00debug_intf
 569                                                       *intf,
 570                                                       struct
 571                                                       debugfs_blob_wrapper
 572                                                       *blob)
 573 {
 574         const struct rt2x00debug *debug = intf->debug;
 575         char *data;
 576
 577         data = kzalloc(8 * MAX_LINE_LENGTH, GFP_KERNEL);
 578         if (!data)
 579                 return NULL;
 580
 581         blob->data = data;
 582         data += sprintf(data, "rt chip:\t%04x\n", intf->rt2x00dev->chip.rt);
 583         data += sprintf(data, "rf chip:\t%04x\n", intf->rt2x00dev->chip.rf);
 584         data += sprintf(data, "revision:\t%04x\n", intf->rt2x00dev->chip.rev);
 585         data += sprintf(data, "\n");
 586         data += sprintf(data, "register\tbase\twords\twordsize\n");
 587         data += sprintf(data, "csr\t%d\t%d\t%d\n",
 588                         debug->csr.word_base,
 589                         debug->csr.word_count,
 590                         debug->csr.word_size);
 591         data += sprintf(data, "eeprom\t%d\t%d\t%d\n",
 592                         debug->eeprom.word_base,
 593                         debug->eeprom.word_count,
 594                         debug->eeprom.word_size);
 595         data += sprintf(data, "bbp\t%d\t%d\t%d\n",
 596                         debug->bbp.word_base,
 597                         debug->bbp.word_count,
 598                         debug->bbp.word_size);
 599         data += sprintf(data, "rf\t%d\t%d\t%d\n",
 600                         debug->rf.word_base,
 601                         debug->rf.word_count,
 602                         debug->rf.word_size);
 603         blob->size = strlen(blob->data);
 604
 605         return debugfs_create_blob(name, S_IRUSR, intf->driver_folder, blob);
 606 }
 607
 608 void rt2x00debug_register(struct rt2x00_dev *rt2x00dev)
 609 {
 610         const struct rt2x00debug *debug = rt2x00dev->ops->debugfs;
 611         struct rt2x00debug_intf *intf;
 612
 613         intf = kzalloc(sizeof(struct rt2x00debug_intf), GFP_KERNEL);
 614         if (!intf) {
 615                 ERROR(rt2x00dev, "Failed to allocate debug handler.\n");
 616                 return;
 617         }
 618
 619         intf->debug = debug;
 620         intf->rt2x00dev = rt2x00dev;
 621         rt2x00dev->debugfs_intf = intf;
 622
 623         intf->driver_folder =
 624             debugfs_create_dir(intf->rt2x00dev->ops->name,
 625                                rt2x00dev->hw->wiphy->debugfsdir);
 626         if (IS_ERR(intf->driver_folder) || !intf->driver_folder)
 627                 goto exit;
 628
 629         intf->driver_entry =
 630             rt2x00debug_create_file_driver("driver", intf, &intf->driver_blob);
 631         if (IS_ERR(intf->driver_entry) || !intf->driver_entry)
 632                 goto exit;
 633
 634         intf->chipset_entry =
 635             rt2x00debug_create_file_chipset("chipset",
 636                                             intf, &intf->chipset_blob);
 637         if (IS_ERR(intf->chipset_entry) || !intf->chipset_entry)
 638                 goto exit;
 639
 640         intf->dev_flags = debugfs_create_file("dev_flags", S_IRUSR,
 641                                               intf->driver_folder, intf,
 642                                               &rt2x00debug_fop_dev_flags);
 643         if (IS_ERR(intf->dev_flags) || !intf->dev_flags)
 644                 goto exit;
 645
 646         intf->register_folder =
 647             debugfs_create_dir("register", intf->driver_folder);
 648         if (IS_ERR(intf->register_folder) || !intf->register_folder)
 649                 goto exit;
 650
 651 #define RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(__intf, __name)     \
 652 ({                                                              \
 653         (__intf)->__name##_off_entry =                          \
 654             debugfs_create_u32(__stringify(__name) "_offset",   \
 655                                S_IRUSR | S_IWUSR,               \
 656                                (__intf)->register_folder,       \
 657                                &(__intf)->offset_##__name);     \
 658         if (IS_ERR((__intf)->__name##_off_entry)                \
 659                         || !(__intf)->__name##_off_entry)       \
 660                 goto exit;                                      \
 661                                                                 \
 662         (__intf)->__name##_val_entry =                          \
 663             debugfs_create_file(__stringify(__name) "_value",   \
 664                                 S_IRUSR | S_IWUSR,              \
 665                                 (__intf)->register_folder,      \
 666                                 (__intf), &rt2x00debug_fop_##__name);\
 667         if (IS_ERR((__intf)->__name##_val_entry)                \
 668                         || !(__intf)->__name##_val_entry)       \
 669                 goto exit;                                      \
 670 })
 671
 672         RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, csr);
 673         RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, eeprom);
 674         RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, bbp);
 675         RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, rf);
 676
 677 #undef RT2X00DEBUGFS_CREATE_REGISTER_ENTRY
 678
 679         intf->queue_folder =
 680             debugfs_create_dir("queue", intf->driver_folder);
 681         if (IS_ERR(intf->queue_folder) || !intf->queue_folder)
 682                 goto exit;
 683
 684         intf->queue_frame_dump_entry =
 685             debugfs_create_file("dump", S_IRUSR, intf->queue_folder,
 686                                 intf, &rt2x00debug_fop_queue_dump);
 687         if (IS_ERR(intf->queue_frame_dump_entry)
 688                 || !intf->queue_frame_dump_entry)
 689                 goto exit;
 690
 691         skb_queue_head_init(&intf->frame_dump_skbqueue);
 692         init_waitqueue_head(&intf->frame_dump_waitqueue);
 693
 694         intf->queue_stats_entry =
 695             debugfs_create_file("queue", S_IRUSR, intf->queue_folder,
 696                                 intf, &rt2x00debug_fop_queue_stats);
 697
 698 #ifdef CONFIG_RT2X00_LIB_CRYPTO
 699         if (test_bit(CONFIG_SUPPORT_HW_CRYPTO, &rt2x00dev->flags))
 700                 intf->crypto_stats_entry =
 701                     debugfs_create_file("crypto", S_IRUGO, intf->queue_folder,
 702                                         intf, &rt2x00debug_fop_crypto_stats);
 703 #endif
 704
 705         return;
 706
 707 exit:
 708         rt2x00debug_deregister(rt2x00dev);
 709         ERROR(rt2x00dev, "Failed to register debug handler.\n");
 710 }
 711
 712 void rt2x00debug_deregister(struct rt2x00_dev *rt2x00dev)
 713 {
 714         struct rt2x00debug_intf *intf = rt2x00dev->debugfs_intf;
 715
 716         if (unlikely(!intf))
 717                 return;
 718
 719         skb_queue_purge(&intf->frame_dump_skbqueue);
 720
 721 #ifdef CONFIG_RT2X00_LIB_CRYPTO
 722         debugfs_remove(intf->crypto_stats_entry);
 723 #endif
 724         debugfs_remove(intf->queue_stats_entry);
 725         debugfs_remove(intf->queue_frame_dump_entry);
 726         debugfs_remove(intf->queue_folder);
 727         debugfs_remove(intf->rf_val_entry);
 728         debugfs_remove(intf->rf_off_entry);
 729         debugfs_remove(intf->bbp_val_entry);
 730         debugfs_remove(intf->bbp_off_entry);
 731         debugfs_remove(intf->eeprom_val_entry);
 732         debugfs_remove(intf->eeprom_off_entry);
 733         debugfs_remove(intf->csr_val_entry);
 734         debugfs_remove(intf->csr_off_entry);
 735         debugfs_remove(intf->register_folder);
 736         debugfs_remove(intf->dev_flags);
 737         debugfs_remove(intf->chipset_entry);
 738         debugfs_remove(intf->driver_entry);
 739         debugfs_remove(intf->driver_folder);
 740         kfree(intf->chipset_blob.data);
 741         kfree(intf->driver_blob.data);
 742         kfree(intf);
 743
 744         rt2x00dev->debugfs_intf = NULL;
 745 }