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 *desc = get_skb_frame_desc(skb);
 160         struct sk_buff *skbcopy;
 161         struct rt2x00dump_hdr *dump_hdr;
 162         struct timeval timestamp;
 163
 164         do_gettimeofday(&timestamp);
 165
 166         if (!test_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags))
 167                 return;
 168
 169         if (skb_queue_len(&intf->frame_dump_skbqueue) > 20) {
 170                 DEBUG(rt2x00dev, "txrx dump queue length exceeded.\n");
 171                 return;
 172         }
 173
 174         skbcopy = alloc_skb(sizeof(*dump_hdr) + desc->desc_len + skb->len,
 175                             GFP_ATOMIC);
 176         if (!skbcopy) {
 177                 DEBUG(rt2x00dev, "Failed to copy skb for dump.\n");
 178                 return;
 179         }
 180
 181         dump_hdr = (struct rt2x00dump_hdr *)skb_put(skbcopy, sizeof(*dump_hdr));
 182         dump_hdr->version = cpu_to_le32(DUMP_HEADER_VERSION);
 183         dump_hdr->header_length = cpu_to_le32(sizeof(*dump_hdr));
 184         dump_hdr->desc_length = cpu_to_le32(desc->desc_len);
 185         dump_hdr->data_length = cpu_to_le32(skb->len);
 186         dump_hdr->chip_rt = cpu_to_le16(rt2x00dev->chip.rt);
 187         dump_hdr->chip_rf = cpu_to_le16(rt2x00dev->chip.rf);
 188         dump_hdr->chip_rev = cpu_to_le16(rt2x00dev->chip.rev);
 189         dump_hdr->type = cpu_to_le16(type);
 190         dump_hdr->queue_index = desc->entry->queue->qid;
 191         dump_hdr->entry_index = desc->entry->entry_idx;
 192         dump_hdr->timestamp_sec = cpu_to_le32(timestamp.tv_sec);
 193         dump_hdr->timestamp_usec = cpu_to_le32(timestamp.tv_usec);
 194
 195         memcpy(skb_put(skbcopy, desc->desc_len), desc->desc, desc->desc_len);
 196         memcpy(skb_put(skbcopy, skb->len), skb->data, skb->len);
 197
 198         skb_queue_tail(&intf->frame_dump_skbqueue, skbcopy);
 199         wake_up_interruptible(&intf->frame_dump_waitqueue);
 200
 201         /*
 202          * Verify that the file has not been closed while we were working.
 203          */
 204         if (!test_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags))
 205                 skb_queue_purge(&intf->frame_dump_skbqueue);
 206 }
 207
 208 static int rt2x00debug_file_open(struct inode *inode, struct file *file)
 209 {
 210         struct rt2x00debug_intf *intf = inode->i_private;
 211
 212         file->private_data = inode->i_private;
 213
 214         if (!try_module_get(intf->debug->owner))
 215                 return -EBUSY;
 216
 217         return 0;
 218 }
 219
 220 static int rt2x00debug_file_release(struct inode *inode, struct file *file)
 221 {
 222         struct rt2x00debug_intf *intf = file->private_data;
 223
 224         module_put(intf->debug->owner);
 225
 226         return 0;
 227 }
 228
 229 static int rt2x00debug_open_queue_dump(struct inode *inode, struct file *file)
 230 {
 231         struct rt2x00debug_intf *intf = inode->i_private;
 232         int retval;
 233
 234         retval = rt2x00debug_file_open(inode, file);
 235         if (retval)
 236                 return retval;
 237
 238         if (test_and_set_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags)) {
 239                 rt2x00debug_file_release(inode, file);
 240                 return -EBUSY;
 241         }
 242
 243         return 0;
 244 }
 245
 246 static int rt2x00debug_release_queue_dump(struct inode *inode, struct file *file)
 247 {
 248         struct rt2x00debug_intf *intf = inode->i_private;
 249
 250         skb_queue_purge(&intf->frame_dump_skbqueue);
 251
 252         clear_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags);
 253
 254         return rt2x00debug_file_release(inode, file);
 255 }
 256
 257 static ssize_t rt2x00debug_read_queue_dump(struct file *file,
 258                                            char __user *buf,
 259                                            size_t length,
 260                                            loff_t *offset)
 261 {
 262         struct rt2x00debug_intf *intf = file->private_data;
 263         struct sk_buff *skb;
 264         size_t status;
 265         int retval;
 266
 267         if (file->f_flags & O_NONBLOCK)
 268                 return -EAGAIN;
 269
 270         retval =
 271             wait_event_interruptible(intf->frame_dump_waitqueue,
 272                                      (skb =
 273                                      skb_dequeue(&intf->frame_dump_skbqueue)));
 274         if (retval)
 275                 return retval;
 276
 277         status = min((size_t)skb->len, length);
 278         if (copy_to_user(buf, skb->data, status)) {
 279                 status = -EFAULT;
 280                 goto exit;
 281         }
 282
 283         *offset += status;
 284
 285 exit:
 286         kfree_skb(skb);
 287
 288         return status;
 289 }
 290
 291 static unsigned int rt2x00debug_poll_queue_dump(struct file *file,
 292                                                 poll_table *wait)
 293 {
 294         struct rt2x00debug_intf *intf = file->private_data;
 295
 296         poll_wait(file, &intf->frame_dump_waitqueue, wait);
 297
 298         if (!skb_queue_empty(&intf->frame_dump_skbqueue))
 299                 return POLLOUT | POLLWRNORM;
 300
 301         return 0;
 302 }
 303
 304 static const struct file_operations rt2x00debug_fop_queue_dump = {
 305         .owner          = THIS_MODULE,
 306         .read           = rt2x00debug_read_queue_dump,
 307         .poll           = rt2x00debug_poll_queue_dump,
 308         .open           = rt2x00debug_open_queue_dump,
 309         .release        = rt2x00debug_release_queue_dump,
 310 };
 311
 312 static ssize_t rt2x00debug_read_queue_stats(struct file *file,
 313                                             char __user *buf,
 314                                             size_t length,
 315                                             loff_t *offset)
 316 {
 317         struct rt2x00debug_intf *intf = file->private_data;
 318         struct data_queue *queue;
 319         unsigned long irqflags;
 320         unsigned int lines = 1 + intf->rt2x00dev->data_queues;
 321         size_t size;
 322         char *data;
 323         char *temp;
 324
 325         if (*offset)
 326                 return 0;
 327
 328         data = kzalloc(lines * MAX_LINE_LENGTH, GFP_KERNEL);
 329         if (!data)
 330                 return -ENOMEM;
 331
 332         temp = data +
 333             sprintf(data, "qid\tcount\tlimit\tlength\tindex\tdone\tcrypto\n");
 334
 335         queue_for_each(intf->rt2x00dev, queue) {
 336                 spin_lock_irqsave(&queue->lock, irqflags);
 337
 338                 temp += sprintf(temp, "%d\t%d\t%d\t%d\t%d\t%d\t%d\n", queue->qid,
 339                                 queue->count, queue->limit, queue->length,
 340                                 queue->index[Q_INDEX],
 341                                 queue->index[Q_INDEX_DONE],
 342                                 queue->index[Q_INDEX_CRYPTO]);
 343
 344                 spin_unlock_irqrestore(&queue->lock, irqflags);
 345         }
 346
 347         size = strlen(data);
 348         size = min(size, length);
 349
 350         if (copy_to_user(buf, data, size)) {
 351                 kfree(data);
 352                 return -EFAULT;
 353         }
 354
 355         kfree(data);
 356
 357         *offset += size;
 358         return size;
 359 }
 360
 361 static const struct file_operations rt2x00debug_fop_queue_stats = {
 362         .owner          = THIS_MODULE,
 363         .read           = rt2x00debug_read_queue_stats,
 364         .open           = rt2x00debug_file_open,
 365         .release        = rt2x00debug_file_release,
 366 };
 367
 368 #ifdef CONFIG_RT2X00_LIB_CRYPTO
 369 static ssize_t rt2x00debug_read_crypto_stats(struct file *file,
 370                                              char __user *buf,
 371                                              size_t length,
 372                                              loff_t *offset)
 373 {
 374         struct rt2x00debug_intf *intf = file->private_data;
 375         char *name[] = { "WEP64", "WEP128", "TKIP", "AES" };
 376         char *data;
 377         char *temp;
 378         size_t size;
 379         unsigned int i;
 380
 381         if (*offset)
 382                 return 0;
 383
 384         data = kzalloc((1 + CIPHER_MAX) * MAX_LINE_LENGTH, GFP_KERNEL);
 385         if (!data)
 386                 return -ENOMEM;
 387
 388         temp = data;
 389         temp += sprintf(data, "cipher\tsuccess\ticv err\tmic err\tkey err\n");
 390
 391         for (i = 0; i < CIPHER_MAX; i++) {
 392                 temp += sprintf(temp, "%s\t%lu\t%lu\t%lu\t%lu\n", name[i],
 393                                 intf->crypto_stats[i].success,
 394                                 intf->crypto_stats[i].icv_error,
 395                                 intf->crypto_stats[i].mic_error,
 396                                 intf->crypto_stats[i].key_error);
 397         }
 398
 399         size = strlen(data);
 400         size = min(size, length);
 401
 402         if (copy_to_user(buf, data, size)) {
 403                 kfree(data);
 404                 return -EFAULT;
 405         }
 406
 407         kfree(data);
 408
 409         *offset += size;
 410         return size;
 411 }
 412
 413 static const struct file_operations rt2x00debug_fop_crypto_stats = {
 414         .owner          = THIS_MODULE,
 415         .read           = rt2x00debug_read_crypto_stats,
 416         .open           = rt2x00debug_file_open,
 417         .release        = rt2x00debug_file_release,
 418 };
 419 #endif
 420
 421 #define RT2X00DEBUGFS_OPS_READ(__name, __format, __type)        \
 422 static ssize_t rt2x00debug_read_##__name(struct file *file,     \
 423                                          char __user *buf,      \
 424                                          size_t length,         \
 425                                          loff_t *offset)        \
 426 {                                                               \
 427         struct rt2x00debug_intf *intf = file->private_data;     \
 428         const struct rt2x00debug *debug = intf->debug;          \
 429         char line[16];                                          \
 430         size_t size;                                            \
 431         unsigned int index = intf->offset_##__name;             \
 432         __type value;                                           \
 433                                                                 \
 434         if (*offset)                                            \
 435                 return 0;                                       \
 436                                                                 \
 437         if (index >= debug->__name.word_count)                  \
 438                 return -EINVAL;                                 \
 439                                                                 \
 440         index += (debug->__name.word_base /                     \
 441                   debug->__name.word_size);                     \
 442                                                                 \
 443         if (debug->__name.flags & RT2X00DEBUGFS_OFFSET)         \
 444                 index *= debug->__name.word_size;               \
 445                                                                 \
 446         debug->__name.read(intf->rt2x00dev, index, &value);     \
 447                                                                 \
 448         size = sprintf(line, __format, value);                  \
 449                                                                 \
 450         if (copy_to_user(buf, line, size))                      \
 451                 return -EFAULT;                                 \
 452                                                                 \
 453         *offset += size;                                        \
 454         return size;                                            \
 455 }
 456
 457 #define RT2X00DEBUGFS_OPS_WRITE(__name, __type)                 \
 458 static ssize_t rt2x00debug_write_##__name(struct file *file,    \
 459                                           const char __user *buf,\
 460                                           size_t length,        \
 461                                           loff_t *offset)       \
 462 {                                                               \
 463         struct rt2x00debug_intf *intf = file->private_data;     \
 464         const struct rt2x00debug *debug = intf->debug;          \
 465         char line[16];                                          \
 466         size_t size;                                            \
 467         unsigned int index = intf->offset_##__name;             \
 468         __type value;                                           \
 469                                                                 \
 470         if (*offset)                                            \
 471                 return 0;                                       \
 472                                                                 \
 473         if (index >= debug->__name.word_count)                  \
 474                 return -EINVAL;                                 \
 475                                                                 \
 476         if (copy_from_user(line, buf, length))                  \
 477                 return -EFAULT;                                 \
 478                                                                 \
 479         size = strlen(line);                                    \
 480         value = simple_strtoul(line, NULL, 0);                  \
 481                                                                 \
 482         index += (debug->__name.word_base /                     \
 483                   debug->__name.word_size);                     \
 484                                                                 \
 485         if (debug->__name.flags & RT2X00DEBUGFS_OFFSET)         \
 486                 index *= debug->__name.word_size;               \
 487                                                                 \
 488         debug->__name.write(intf->rt2x00dev, index, value);     \
 489                                                                 \
 490         *offset += size;                                        \
 491         return size;                                            \
 492 }
 493
 494 #define RT2X00DEBUGFS_OPS(__name, __format, __type)             \
 495 RT2X00DEBUGFS_OPS_READ(__name, __format, __type);               \
 496 RT2X00DEBUGFS_OPS_WRITE(__name, __type);                        \
 497                                                                 \
 498 static const struct file_operations rt2x00debug_fop_##__name = {\
 499         .owner          = THIS_MODULE,                          \
 500         .read           = rt2x00debug_read_##__name,            \
 501         .write          = rt2x00debug_write_##__name,           \
 502         .open           = rt2x00debug_file_open,                \
 503         .release        = rt2x00debug_file_release,             \
 504 };
 505
 506 RT2X00DEBUGFS_OPS(csr, "0x%.8x\n", u32);
 507 RT2X00DEBUGFS_OPS(eeprom, "0x%.4x\n", u16);
 508 RT2X00DEBUGFS_OPS(bbp, "0x%.2x\n", u8);
 509 RT2X00DEBUGFS_OPS(rf, "0x%.8x\n", u32);
 510
 511 static ssize_t rt2x00debug_read_dev_flags(struct file *file,
 512                                           char __user *buf,
 513                                           size_t length,
 514                                           loff_t *offset)
 515 {
 516         struct rt2x00debug_intf *intf = file->private_data;
 517         char line[16];
 518         size_t size;
 519
 520         if (*offset)
 521                 return 0;
 522
 523         size = sprintf(line, "0x%.8x\n", (unsigned int)intf->rt2x00dev->flags);
 524
 525         if (copy_to_user(buf, line, size))
 526                 return -EFAULT;
 527
 528         *offset += size;
 529         return size;
 530 }
 531
 532 static const struct file_operations rt2x00debug_fop_dev_flags = {
 533         .owner          = THIS_MODULE,
 534         .read           = rt2x00debug_read_dev_flags,
 535         .open           = rt2x00debug_file_open,
 536         .release        = rt2x00debug_file_release,
 537 };
 538
 539 static struct dentry *rt2x00debug_create_file_driver(const char *name,
 540                                                      struct rt2x00debug_intf
 541                                                      *intf,
 542                                                      struct debugfs_blob_wrapper
 543                                                      *blob)
 544 {
 545         char *data;
 546
 547         data = kzalloc(3 * MAX_LINE_LENGTH, GFP_KERNEL);
 548         if (!data)
 549                 return NULL;
 550
 551         blob->data = data;
 552         data += sprintf(data, "driver:\t%s\n", intf->rt2x00dev->ops->name);
 553         data += sprintf(data, "version:\t%s\n", DRV_VERSION);
 554         data += sprintf(data, "compiled:\t%s %s\n", __DATE__, __TIME__);
 555         blob->size = strlen(blob->data);
 556
 557         return debugfs_create_blob(name, S_IRUSR, intf->driver_folder, blob);
 558 }
 559
 560 static struct dentry *rt2x00debug_create_file_chipset(const char *name,
 561                                                       struct rt2x00debug_intf
 562                                                       *intf,
 563                                                       struct
 564                                                       debugfs_blob_wrapper
 565                                                       *blob)
 566 {
 567         const struct rt2x00debug *debug = intf->debug;
 568         char *data;
 569
 570         data = kzalloc(8 * MAX_LINE_LENGTH, GFP_KERNEL);
 571         if (!data)
 572                 return NULL;
 573
 574         blob->data = data;
 575         data += sprintf(data, "rt chip:\t%04x\n", intf->rt2x00dev->chip.rt);
 576         data += sprintf(data, "rf chip:\t%04x\n", intf->rt2x00dev->chip.rf);
 577         data += sprintf(data, "revision:\t%04x\n", intf->rt2x00dev->chip.rev);
 578         data += sprintf(data, "\n");
 579         data += sprintf(data, "register\tbase\twords\twordsize\n");
 580         data += sprintf(data, "csr\t%d\t%d\t%d\n",
 581                         debug->csr.word_base,
 582                         debug->csr.word_count,
 583                         debug->csr.word_size);
 584         data += sprintf(data, "eeprom\t%d\t%d\t%d\n",
 585                         debug->eeprom.word_base,
 586                         debug->eeprom.word_count,
 587                         debug->eeprom.word_size);
 588         data += sprintf(data, "bbp\t%d\t%d\t%d\n",
 589                         debug->bbp.word_base,
 590                         debug->bbp.word_count,
 591                         debug->bbp.word_size);
 592         data += sprintf(data, "rf\t%d\t%d\t%d\n",
 593                         debug->rf.word_base,
 594                         debug->rf.word_count,
 595                         debug->rf.word_size);
 596         blob->size = strlen(blob->data);
 597
 598         return debugfs_create_blob(name, S_IRUSR, intf->driver_folder, blob);
 599 }
 600
 601 void rt2x00debug_register(struct rt2x00_dev *rt2x00dev)
 602 {
 603         const struct rt2x00debug *debug = rt2x00dev->ops->debugfs;
 604         struct rt2x00debug_intf *intf;
 605
 606         intf = kzalloc(sizeof(struct rt2x00debug_intf), GFP_KERNEL);
 607         if (!intf) {
 608                 ERROR(rt2x00dev, "Failed to allocate debug handler.\n");
 609                 return;
 610         }
 611
 612         intf->debug = debug;
 613         intf->rt2x00dev = rt2x00dev;
 614         rt2x00dev->debugfs_intf = intf;
 615
 616         intf->driver_folder =
 617             debugfs_create_dir(intf->rt2x00dev->ops->name,
 618                                rt2x00dev->hw->wiphy->debugfsdir);
 619         if (IS_ERR(intf->driver_folder) || !intf->driver_folder)
 620                 goto exit;
 621
 622         intf->driver_entry =
 623             rt2x00debug_create_file_driver("driver", intf, &intf->driver_blob);
 624         if (IS_ERR(intf->driver_entry) || !intf->driver_entry)
 625                 goto exit;
 626
 627         intf->chipset_entry =
 628             rt2x00debug_create_file_chipset("chipset",
 629                                             intf, &intf->chipset_blob);
 630         if (IS_ERR(intf->chipset_entry) || !intf->chipset_entry)
 631                 goto exit;
 632
 633         intf->dev_flags = debugfs_create_file("dev_flags", S_IRUSR,
 634                                               intf->driver_folder, intf,
 635                                               &rt2x00debug_fop_dev_flags);
 636         if (IS_ERR(intf->dev_flags) || !intf->dev_flags)
 637                 goto exit;
 638
 639         intf->register_folder =
 640             debugfs_create_dir("register", intf->driver_folder);
 641         if (IS_ERR(intf->register_folder) || !intf->register_folder)
 642                 goto exit;
 643
 644 #define RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(__intf, __name)     \
 645 ({                                                              \
 646         (__intf)->__name##_off_entry =                          \
 647             debugfs_create_u32(__stringify(__name) "_offset",   \
 648                                S_IRUSR | S_IWUSR,               \
 649                                (__intf)->register_folder,       \
 650                                &(__intf)->offset_##__name);     \
 651         if (IS_ERR((__intf)->__name##_off_entry)                \
 652                         || !(__intf)->__name##_off_entry)       \
 653                 goto exit;                                      \
 654                                                                 \
 655         (__intf)->__name##_val_entry =                          \
 656             debugfs_create_file(__stringify(__name) "_value",   \
 657                                 S_IRUSR | S_IWUSR,              \
 658                                 (__intf)->register_folder,      \
 659                                 (__intf), &rt2x00debug_fop_##__name);\
 660         if (IS_ERR((__intf)->__name##_val_entry)                \
 661                         || !(__intf)->__name##_val_entry)       \
 662                 goto exit;                                      \
 663 })
 664
 665         RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, csr);
 666         RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, eeprom);
 667         RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, bbp);
 668         RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, rf);
 669
 670 #undef RT2X00DEBUGFS_CREATE_REGISTER_ENTRY
 671
 672         intf->queue_folder =
 673             debugfs_create_dir("queue", intf->driver_folder);
 674         if (IS_ERR(intf->queue_folder) || !intf->queue_folder)
 675                 goto exit;
 676
 677         intf->queue_frame_dump_entry =
 678             debugfs_create_file("dump", S_IRUSR, intf->queue_folder,
 679                                 intf, &rt2x00debug_fop_queue_dump);
 680         if (IS_ERR(intf->queue_frame_dump_entry)
 681                 || !intf->queue_frame_dump_entry)
 682                 goto exit;
 683
 684         skb_queue_head_init(&intf->frame_dump_skbqueue);
 685         init_waitqueue_head(&intf->frame_dump_waitqueue);
 686
 687         intf->queue_stats_entry =
 688             debugfs_create_file("queue", S_IRUSR, intf->queue_folder,
 689                                 intf, &rt2x00debug_fop_queue_stats);
 690
 691 #ifdef CONFIG_RT2X00_LIB_CRYPTO
 692         if (test_bit(CONFIG_SUPPORT_HW_CRYPTO, &rt2x00dev->flags))
 693                 intf->crypto_stats_entry =
 694                     debugfs_create_file("crypto", S_IRUGO, intf->queue_folder,
 695                                         intf, &rt2x00debug_fop_crypto_stats);
 696 #endif
 697
 698         return;
 699
 700 exit:
 701         rt2x00debug_deregister(rt2x00dev);
 702         ERROR(rt2x00dev, "Failed to register debug handler.\n");
 703
 704         return;
 705 }
 706
 707 void rt2x00debug_deregister(struct rt2x00_dev *rt2x00dev)
 708 {
 709         struct rt2x00debug_intf *intf = rt2x00dev->debugfs_intf;
 710
 711         if (unlikely(!intf))
 712                 return;
 713
 714         skb_queue_purge(&intf->frame_dump_skbqueue);
 715
 716 #ifdef CONFIG_RT2X00_LIB_CRYPTO
 717         debugfs_remove(intf->crypto_stats_entry);
 718 #endif
 719         debugfs_remove(intf->queue_stats_entry);
 720         debugfs_remove(intf->queue_frame_dump_entry);
 721         debugfs_remove(intf->queue_folder);
 722         debugfs_remove(intf->rf_val_entry);
 723         debugfs_remove(intf->rf_off_entry);
 724         debugfs_remove(intf->bbp_val_entry);
 725         debugfs_remove(intf->bbp_off_entry);
 726         debugfs_remove(intf->eeprom_val_entry);
 727         debugfs_remove(intf->eeprom_off_entry);
 728         debugfs_remove(intf->csr_val_entry);
 729         debugfs_remove(intf->csr_off_entry);
 730         debugfs_remove(intf->register_folder);
 731         debugfs_remove(intf->dev_flags);
 732         debugfs_remove(intf->chipset_entry);
 733         debugfs_remove(intf->driver_entry);
 734         debugfs_remove(intf->driver_folder);
 735         kfree(intf->chipset_blob.data);
 736         kfree(intf->driver_blob.data);
 737         kfree(intf);
 738
 739         rt2x00dev->debugfs_intf = NULL;
 740 }