drivers/net/wireless/rt2x00/rt2x00debug.c

   1 /*
   2         Copyright (C) 2004 - 2008 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                                enum cipher cipher, enum rx_crypto status)
 134 {
 135         struct rt2x00debug_intf *intf = rt2x00dev->debugfs_intf;
 136
 137         if (cipher == CIPHER_TKIP_NO_MIC)
 138                 cipher = CIPHER_TKIP;
 139         if (cipher == CIPHER_NONE || cipher > CIPHER_MAX)
 140                 return;
 141
 142         /* Remove CIPHER_NONE index */
 143         cipher--;
 144
 145         intf->crypto_stats[cipher].success += (status == RX_CRYPTO_SUCCESS);
 146         intf->crypto_stats[cipher].icv_error += (status == RX_CRYPTO_FAIL_ICV);
 147         intf->crypto_stats[cipher].mic_error += (status == RX_CRYPTO_FAIL_MIC);
 148         intf->crypto_stats[cipher].key_error += (status == RX_CRYPTO_FAIL_KEY);
 149 }
 150
 151 void rt2x00debug_dump_frame(struct rt2x00_dev *rt2x00dev,
 152                             enum rt2x00_dump_type type, struct sk_buff *skb)
 153 {
 154         struct rt2x00debug_intf *intf = rt2x00dev->debugfs_intf;
 155         struct skb_frame_desc *desc = get_skb_frame_desc(skb);
 156         struct sk_buff *skbcopy;
 157         struct rt2x00dump_hdr *dump_hdr;
 158         struct timeval timestamp;
 159
 160         do_gettimeofday(&timestamp);
 161
 162         if (!test_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags))
 163                 return;
 164
 165         if (skb_queue_len(&intf->frame_dump_skbqueue) > 20) {
 166                 DEBUG(rt2x00dev, "txrx dump queue length exceeded.\n");
 167                 return;
 168         }
 169
 170         skbcopy = alloc_skb(sizeof(*dump_hdr) + desc->desc_len + skb->len,
 171                             GFP_ATOMIC);
 172         if (!skbcopy) {
 173                 DEBUG(rt2x00dev, "Failed to copy skb for dump.\n");
 174                 return;
 175         }
 176
 177         dump_hdr = (struct rt2x00dump_hdr *)skb_put(skbcopy, sizeof(*dump_hdr));
 178         dump_hdr->version = cpu_to_le32(DUMP_HEADER_VERSION);
 179         dump_hdr->header_length = cpu_to_le32(sizeof(*dump_hdr));
 180         dump_hdr->desc_length = cpu_to_le32(desc->desc_len);
 181         dump_hdr->data_length = cpu_to_le32(skb->len);
 182         dump_hdr->chip_rt = cpu_to_le16(rt2x00dev->chip.rt);
 183         dump_hdr->chip_rf = cpu_to_le16(rt2x00dev->chip.rf);
 184         dump_hdr->chip_rev = cpu_to_le32(rt2x00dev->chip.rev);
 185         dump_hdr->type = cpu_to_le16(type);
 186         dump_hdr->queue_index = desc->entry->queue->qid;
 187         dump_hdr->entry_index = desc->entry->entry_idx;
 188         dump_hdr->timestamp_sec = cpu_to_le32(timestamp.tv_sec);
 189         dump_hdr->timestamp_usec = cpu_to_le32(timestamp.tv_usec);
 190
 191         memcpy(skb_put(skbcopy, desc->desc_len), desc->desc, desc->desc_len);
 192         memcpy(skb_put(skbcopy, skb->len), skb->data, skb->len);
 193
 194         skb_queue_tail(&intf->frame_dump_skbqueue, skbcopy);
 195         wake_up_interruptible(&intf->frame_dump_waitqueue);
 196
 197         /*
 198          * Verify that the file has not been closed while we were working.
 199          */
 200         if (!test_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags))
 201                 skb_queue_purge(&intf->frame_dump_skbqueue);
 202 }
 203
 204 static int rt2x00debug_file_open(struct inode *inode, struct file *file)
 205 {
 206         struct rt2x00debug_intf *intf = inode->i_private;
 207
 208         file->private_data = inode->i_private;
 209
 210         if (!try_module_get(intf->debug->owner))
 211                 return -EBUSY;
 212
 213         return 0;
 214 }
 215
 216 static int rt2x00debug_file_release(struct inode *inode, struct file *file)
 217 {
 218         struct rt2x00debug_intf *intf = file->private_data;
 219
 220         module_put(intf->debug->owner);
 221
 222         return 0;
 223 }
 224
 225 static int rt2x00debug_open_queue_dump(struct inode *inode, struct file *file)
 226 {
 227         struct rt2x00debug_intf *intf = inode->i_private;
 228         int retval;
 229
 230         retval = rt2x00debug_file_open(inode, file);
 231         if (retval)
 232                 return retval;
 233
 234         if (test_and_set_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags)) {
 235                 rt2x00debug_file_release(inode, file);
 236                 return -EBUSY;
 237         }
 238
 239         return 0;
 240 }
 241
 242 static int rt2x00debug_release_queue_dump(struct inode *inode, struct file *file)
 243 {
 244         struct rt2x00debug_intf *intf = inode->i_private;
 245
 246         skb_queue_purge(&intf->frame_dump_skbqueue);
 247
 248         clear_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags);
 249
 250         return rt2x00debug_file_release(inode, file);
 251 }
 252
 253 static ssize_t rt2x00debug_read_queue_dump(struct file *file,
 254                                            char __user *buf,
 255                                            size_t length,
 256                                            loff_t *offset)
 257 {
 258         struct rt2x00debug_intf *intf = file->private_data;
 259         struct sk_buff *skb;
 260         size_t status;
 261         int retval;
 262
 263         if (file->f_flags & O_NONBLOCK)
 264                 return -EAGAIN;
 265
 266         retval =
 267             wait_event_interruptible(intf->frame_dump_waitqueue,
 268                                      (skb =
 269                                      skb_dequeue(&intf->frame_dump_skbqueue)));
 270         if (retval)
 271                 return retval;
 272
 273         status = min((size_t)skb->len, length);
 274         if (copy_to_user(buf, skb->data, status)) {
 275                 status = -EFAULT;
 276                 goto exit;
 277         }
 278
 279         *offset += status;
 280
 281 exit:
 282         kfree_skb(skb);
 283
 284         return status;
 285 }
 286
 287 static unsigned int rt2x00debug_poll_queue_dump(struct file *file,
 288                                                 poll_table *wait)
 289 {
 290         struct rt2x00debug_intf *intf = file->private_data;
 291
 292         poll_wait(file, &intf->frame_dump_waitqueue, wait);
 293
 294         if (!skb_queue_empty(&intf->frame_dump_skbqueue))
 295                 return POLLOUT | POLLWRNORM;
 296
 297         return 0;
 298 }
 299
 300 static const struct file_operations rt2x00debug_fop_queue_dump = {
 301         .owner          = THIS_MODULE,
 302         .read           = rt2x00debug_read_queue_dump,
 303         .poll           = rt2x00debug_poll_queue_dump,
 304         .open           = rt2x00debug_open_queue_dump,
 305         .release        = rt2x00debug_release_queue_dump,
 306 };
 307
 308 static ssize_t rt2x00debug_read_queue_stats(struct file *file,
 309                                             char __user *buf,
 310                                             size_t length,
 311                                             loff_t *offset)
 312 {
 313         struct rt2x00debug_intf *intf = file->private_data;
 314         struct data_queue *queue;
 315         unsigned long irqflags;
 316         unsigned int lines = 1 + intf->rt2x00dev->data_queues;
 317         size_t size;
 318         char *data;
 319         char *temp;
 320
 321         if (*offset)
 322                 return 0;
 323
 324         data = kzalloc(lines * MAX_LINE_LENGTH, GFP_KERNEL);
 325         if (!data)
 326                 return -ENOMEM;
 327
 328         temp = data +
 329             sprintf(data, "qid\tcount\tlimit\tlength\tindex\tdone\tcrypto\n");
 330
 331         queue_for_each(intf->rt2x00dev, queue) {
 332                 spin_lock_irqsave(&queue->lock, irqflags);
 333
 334                 temp += sprintf(temp, "%d\t%d\t%d\t%d\t%d\t%d\t%d\n", queue->qid,
 335                                 queue->count, queue->limit, queue->length,
 336                                 queue->index[Q_INDEX],
 337                                 queue->index[Q_INDEX_DONE],
 338                                 queue->index[Q_INDEX_CRYPTO]);
 339
 340                 spin_unlock_irqrestore(&queue->lock, irqflags);
 341         }
 342
 343         size = strlen(data);
 344         size = min(size, length);
 345
 346         if (copy_to_user(buf, data, size)) {
 347                 kfree(data);
 348                 return -EFAULT;
 349         }
 350
 351         kfree(data);
 352
 353         *offset += size;
 354         return size;
 355 }
 356
 357 static const struct file_operations rt2x00debug_fop_queue_stats = {
 358         .owner          = THIS_MODULE,
 359         .read           = rt2x00debug_read_queue_stats,
 360         .open           = rt2x00debug_file_open,
 361         .release        = rt2x00debug_file_release,
 362 };
 363
 364 #ifdef CONFIG_RT2X00_LIB_CRYPTO
 365 static ssize_t rt2x00debug_read_crypto_stats(struct file *file,
 366                                              char __user *buf,
 367                                              size_t length,
 368                                              loff_t *offset)
 369 {
 370         struct rt2x00debug_intf *intf = file->private_data;
 371         char *name[] = { "WEP64", "WEP128", "TKIP", "AES" };
 372         char *data;
 373         char *temp;
 374         size_t size;
 375         unsigned int i;
 376
 377         if (*offset)
 378                 return 0;
 379
 380         data = kzalloc((1 + CIPHER_MAX) * MAX_LINE_LENGTH, GFP_KERNEL);
 381         if (!data)
 382                 return -ENOMEM;
 383
 384         temp = data;
 385         temp += sprintf(data, "cipher\tsuccess\ticv err\tmic err\tkey err\n");
 386
 387         for (i = 0; i < CIPHER_MAX; i++) {
 388                 temp += sprintf(temp, "%s\t%lu\t%lu\t%lu\t%lu\n", name[i],
 389                                 intf->crypto_stats[i].success,
 390                                 intf->crypto_stats[i].icv_error,
 391                                 intf->crypto_stats[i].mic_error,
 392                                 intf->crypto_stats[i].key_error);
 393         }
 394
 395         size = strlen(data);
 396         size = min(size, length);
 397
 398         if (copy_to_user(buf, data, size)) {
 399                 kfree(data);
 400                 return -EFAULT;
 401         }
 402
 403         kfree(data);
 404
 405         *offset += size;
 406         return size;
 407 }
 408
 409 static const struct file_operations rt2x00debug_fop_crypto_stats = {
 410         .owner          = THIS_MODULE,
 411         .read           = rt2x00debug_read_crypto_stats,
 412         .open           = rt2x00debug_file_open,
 413         .release        = rt2x00debug_file_release,
 414 };
 415 #endif
 416
 417 #define RT2X00DEBUGFS_OPS_READ(__name, __format, __type)        \
 418 static ssize_t rt2x00debug_read_##__name(struct file *file,     \
 419                                          char __user *buf,      \
 420                                          size_t length,         \
 421                                          loff_t *offset)        \
 422 {                                                               \
 423         struct rt2x00debug_intf *intf = file->private_data;     \
 424         const struct rt2x00debug *debug = intf->debug;          \
 425         char line[16];                                          \
 426         size_t size;                                            \
 427         unsigned int index = intf->offset_##__name;             \
 428         __type value;                                           \
 429                                                                 \
 430         if (*offset)                                            \
 431                 return 0;                                       \
 432                                                                 \
 433         if (index >= debug->__name.word_count)                  \
 434                 return -EINVAL;                                 \
 435                                                                 \
 436         if (debug->__name.flags & RT2X00DEBUGFS_OFFSET)         \
 437                 index *= debug->__name.word_size;               \
 438                                                                 \
 439         index += debug->__name.word_base;                       \
 440                                                                 \
 441         debug->__name.read(intf->rt2x00dev, index, &value);     \
 442                                                                 \
 443         size = sprintf(line, __format, value);                  \
 444                                                                 \
 445         if (copy_to_user(buf, line, size))                      \
 446                 return -EFAULT;                                 \
 447                                                                 \
 448         *offset += size;                                        \
 449         return size;                                            \
 450 }
 451
 452 #define RT2X00DEBUGFS_OPS_WRITE(__name, __type)                 \
 453 static ssize_t rt2x00debug_write_##__name(struct file *file,    \
 454                                           const char __user *buf,\
 455                                           size_t length,        \
 456                                           loff_t *offset)       \
 457 {                                                               \
 458         struct rt2x00debug_intf *intf = file->private_data;     \
 459         const struct rt2x00debug *debug = intf->debug;          \
 460         char line[16];                                          \
 461         size_t size;                                            \
 462         unsigned int index = intf->offset_##__name;             \
 463         __type value;                                           \
 464                                                                 \
 465         if (*offset)                                            \
 466                 return 0;                                       \
 467                                                                 \
 468         if (index >= debug->__name.word_count)                  \
 469                 return -EINVAL;                                 \
 470                                                                 \
 471         if (copy_from_user(line, buf, length))                  \
 472                 return -EFAULT;                                 \
 473                                                                 \
 474         size = strlen(line);                                    \
 475         value = simple_strtoul(line, NULL, 0);                  \
 476                                                                 \
 477         if (debug->__name.flags & RT2X00DEBUGFS_OFFSET)         \
 478                 index *= debug->__name.word_size;               \
 479                                                                 \
 480         index += debug->__name.word_base;                       \
 481                                                                 \
 482         debug->__name.write(intf->rt2x00dev, index, value);     \
 483                                                                 \
 484         *offset += size;                                        \
 485         return size;                                            \
 486 }
 487
 488 #define RT2X00DEBUGFS_OPS(__name, __format, __type)             \
 489 RT2X00DEBUGFS_OPS_READ(__name, __format, __type);               \
 490 RT2X00DEBUGFS_OPS_WRITE(__name, __type);                        \
 491                                                                 \
 492 static const struct file_operations rt2x00debug_fop_##__name = {\
 493         .owner          = THIS_MODULE,                          \
 494         .read           = rt2x00debug_read_##__name,            \
 495         .write          = rt2x00debug_write_##__name,           \
 496         .open           = rt2x00debug_file_open,                \
 497         .release        = rt2x00debug_file_release,             \
 498 };
 499
 500 RT2X00DEBUGFS_OPS(csr, "0x%.8x\n", u32);
 501 RT2X00DEBUGFS_OPS(eeprom, "0x%.4x\n", u16);
 502 RT2X00DEBUGFS_OPS(bbp, "0x%.2x\n", u8);
 503 RT2X00DEBUGFS_OPS(rf, "0x%.8x\n", u32);
 504
 505 static ssize_t rt2x00debug_read_dev_flags(struct file *file,
 506                                           char __user *buf,
 507                                           size_t length,
 508                                           loff_t *offset)
 509 {
 510         struct rt2x00debug_intf *intf = file->private_data;
 511         char line[16];
 512         size_t size;
 513
 514         if (*offset)
 515                 return 0;
 516
 517         size = sprintf(line, "0x%.8x\n", (unsigned int)intf->rt2x00dev->flags);
 518
 519         if (copy_to_user(buf, line, size))
 520                 return -EFAULT;
 521
 522         *offset += size;
 523         return size;
 524 }
 525
 526 static const struct file_operations rt2x00debug_fop_dev_flags = {
 527         .owner          = THIS_MODULE,
 528         .read           = rt2x00debug_read_dev_flags,
 529         .open           = rt2x00debug_file_open,
 530         .release        = rt2x00debug_file_release,
 531 };
 532
 533 static struct dentry *rt2x00debug_create_file_driver(const char *name,
 534                                                      struct rt2x00debug_intf
 535                                                      *intf,
 536                                                      struct debugfs_blob_wrapper
 537                                                      *blob)
 538 {
 539         char *data;
 540
 541         data = kzalloc(3 * MAX_LINE_LENGTH, GFP_KERNEL);
 542         if (!data)
 543                 return NULL;
 544
 545         blob->data = data;
 546         data += sprintf(data, "driver: %s\n", intf->rt2x00dev->ops->name);
 547         data += sprintf(data, "version: %s\n", DRV_VERSION);
 548         data += sprintf(data, "compiled: %s %s\n", __DATE__, __TIME__);
 549         blob->size = strlen(blob->data);
 550
 551         return debugfs_create_blob(name, S_IRUSR, intf->driver_folder, blob);
 552 }
 553
 554 static struct dentry *rt2x00debug_create_file_chipset(const char *name,
 555                                                       struct rt2x00debug_intf
 556                                                       *intf,
 557                                                       struct
 558                                                       debugfs_blob_wrapper
 559                                                       *blob)
 560 {
 561         const struct rt2x00debug *debug = intf->debug;
 562         char *data;
 563
 564         data = kzalloc(8 * MAX_LINE_LENGTH, GFP_KERNEL);
 565         if (!data)
 566                 return NULL;
 567
 568         blob->data = data;
 569         data += sprintf(data, "rt chip: %04x\n", intf->rt2x00dev->chip.rt);
 570         data += sprintf(data, "rf chip: %04x\n", intf->rt2x00dev->chip.rf);
 571         data += sprintf(data, "revision:%08x\n", intf->rt2x00dev->chip.rev);
 572         data += sprintf(data, "\n");
 573         data += sprintf(data, "csr length: %d\n", debug->csr.word_count);
 574         data += sprintf(data, "eeprom length: %d\n", debug->eeprom.word_count);
 575         data += sprintf(data, "bbp length: %d\n", debug->bbp.word_count);
 576         data += sprintf(data, "rf length: %d\n", debug->rf.word_count);
 577         blob->size = strlen(blob->data);
 578
 579         return debugfs_create_blob(name, S_IRUSR, intf->driver_folder, blob);
 580 }
 581
 582 void rt2x00debug_register(struct rt2x00_dev *rt2x00dev)
 583 {
 584         const struct rt2x00debug *debug = rt2x00dev->ops->debugfs;
 585         struct rt2x00debug_intf *intf;
 586
 587         intf = kzalloc(sizeof(struct rt2x00debug_intf), GFP_KERNEL);
 588         if (!intf) {
 589                 ERROR(rt2x00dev, "Failed to allocate debug handler.\n");
 590                 return;
 591         }
 592
 593         intf->debug = debug;
 594         intf->rt2x00dev = rt2x00dev;
 595         rt2x00dev->debugfs_intf = intf;
 596
 597         intf->driver_folder =
 598             debugfs_create_dir(intf->rt2x00dev->ops->name,
 599                                rt2x00dev->hw->wiphy->debugfsdir);
 600         if (IS_ERR(intf->driver_folder) || !intf->driver_folder)
 601                 goto exit;
 602
 603         intf->driver_entry =
 604             rt2x00debug_create_file_driver("driver", intf, &intf->driver_blob);
 605         if (IS_ERR(intf->driver_entry) || !intf->driver_entry)
 606                 goto exit;
 607
 608         intf->chipset_entry =
 609             rt2x00debug_create_file_chipset("chipset",
 610                                             intf, &intf->chipset_blob);
 611         if (IS_ERR(intf->chipset_entry) || !intf->chipset_entry)
 612                 goto exit;
 613
 614         intf->dev_flags = debugfs_create_file("dev_flags", S_IRUSR,
 615                                               intf->driver_folder, intf,
 616                                               &rt2x00debug_fop_dev_flags);
 617         if (IS_ERR(intf->dev_flags) || !intf->dev_flags)
 618                 goto exit;
 619
 620         intf->register_folder =
 621             debugfs_create_dir("register", intf->driver_folder);
 622         if (IS_ERR(intf->register_folder) || !intf->register_folder)
 623                 goto exit;
 624
 625 #define RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(__intf, __name)     \
 626 ({                                                              \
 627         (__intf)->__name##_off_entry =                          \
 628             debugfs_create_u32(__stringify(__name) "_offset",   \
 629                                S_IRUSR | S_IWUSR,               \
 630                                (__intf)->register_folder,       \
 631                                &(__intf)->offset_##__name);     \
 632         if (IS_ERR((__intf)->__name##_off_entry)                \
 633                         || !(__intf)->__name##_off_entry)       \
 634                 goto exit;                                      \
 635                                                                 \
 636         (__intf)->__name##_val_entry =                          \
 637             debugfs_create_file(__stringify(__name) "_value",   \
 638                                 S_IRUSR | S_IWUSR,              \
 639                                 (__intf)->register_folder,      \
 640                                 (__intf), &rt2x00debug_fop_##__name);\
 641         if (IS_ERR((__intf)->__name##_val_entry)                \
 642                         || !(__intf)->__name##_val_entry)       \
 643                 goto exit;                                      \
 644 })
 645
 646         RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, csr);
 647         RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, eeprom);
 648         RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, bbp);
 649         RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, rf);
 650
 651 #undef RT2X00DEBUGFS_CREATE_REGISTER_ENTRY
 652
 653         intf->queue_folder =
 654             debugfs_create_dir("queue", intf->driver_folder);
 655         if (IS_ERR(intf->queue_folder) || !intf->queue_folder)
 656                 goto exit;
 657
 658         intf->queue_frame_dump_entry =
 659             debugfs_create_file("dump", S_IRUSR, intf->queue_folder,
 660                                 intf, &rt2x00debug_fop_queue_dump);
 661         if (IS_ERR(intf->queue_frame_dump_entry)
 662                 || !intf->queue_frame_dump_entry)
 663                 goto exit;
 664
 665         skb_queue_head_init(&intf->frame_dump_skbqueue);
 666         init_waitqueue_head(&intf->frame_dump_waitqueue);
 667
 668         intf->queue_stats_entry =
 669             debugfs_create_file("queue", S_IRUSR, intf->queue_folder,
 670                                 intf, &rt2x00debug_fop_queue_stats);
 671
 672 #ifdef CONFIG_RT2X00_LIB_CRYPTO
 673         if (test_bit(CONFIG_SUPPORT_HW_CRYPTO, &rt2x00dev->flags))
 674                 intf->crypto_stats_entry =
 675                     debugfs_create_file("crypto", S_IRUGO, intf->queue_folder,
 676                                         intf, &rt2x00debug_fop_crypto_stats);
 677 #endif
 678
 679         return;
 680
 681 exit:
 682         rt2x00debug_deregister(rt2x00dev);
 683         ERROR(rt2x00dev, "Failed to register debug handler.\n");
 684
 685         return;
 686 }
 687
 688 void rt2x00debug_deregister(struct rt2x00_dev *rt2x00dev)
 689 {
 690         struct rt2x00debug_intf *intf = rt2x00dev->debugfs_intf;
 691
 692         if (unlikely(!intf))
 693                 return;
 694
 695         skb_queue_purge(&intf->frame_dump_skbqueue);
 696
 697 #ifdef CONFIG_RT2X00_LIB_CRYPTO
 698         debugfs_remove(intf->crypto_stats_entry);
 699 #endif
 700         debugfs_remove(intf->queue_stats_entry);
 701         debugfs_remove(intf->queue_frame_dump_entry);
 702         debugfs_remove(intf->queue_folder);
 703         debugfs_remove(intf->rf_val_entry);
 704         debugfs_remove(intf->rf_off_entry);
 705         debugfs_remove(intf->bbp_val_entry);
 706         debugfs_remove(intf->bbp_off_entry);
 707         debugfs_remove(intf->eeprom_val_entry);
 708         debugfs_remove(intf->eeprom_off_entry);
 709         debugfs_remove(intf->csr_val_entry);
 710         debugfs_remove(intf->csr_off_entry);
 711         debugfs_remove(intf->register_folder);
 712         debugfs_remove(intf->dev_flags);
 713         debugfs_remove(intf->chipset_entry);
 714         debugfs_remove(intf->driver_entry);
 715         debugfs_remove(intf->driver_folder);
 716         kfree(intf->chipset_blob.data);
 717         kfree(intf->driver_blob.data);
 718         kfree(intf);
 719
 720         rt2x00dev->debugfs_intf = NULL;
 721 }