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         if (likely(!test_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags)))
 166                 return;
 167
 168         do_gettimeofday(&timestamp);
 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 EXPORT_SYMBOL_GPL(rt2x00debug_dump_frame);
 215
 216 static int rt2x00debug_file_open(struct inode *inode, struct file *file)
 217 {
 218         struct rt2x00debug_intf *intf = inode->i_private;
 219
 220         file->private_data = inode->i_private;
 221
 222         if (!try_module_get(intf->debug->owner))
 223                 return -EBUSY;
 224
 225         return 0;
 226 }
 227
 228 static int rt2x00debug_file_release(struct inode *inode, struct file *file)
 229 {
 230         struct rt2x00debug_intf *intf = file->private_data;
 231
 232         module_put(intf->debug->owner);
 233
 234         return 0;
 235 }
 236
 237 static int rt2x00debug_open_queue_dump(struct inode *inode, struct file *file)
 238 {
 239         struct rt2x00debug_intf *intf = inode->i_private;
 240         int retval;
 241
 242         retval = rt2x00debug_file_open(inode, file);
 243         if (retval)
 244                 return retval;
 245
 246         if (test_and_set_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags)) {
 247                 rt2x00debug_file_release(inode, file);
 248                 return -EBUSY;
 249         }
 250
 251         return 0;
 252 }
 253
 254 static int rt2x00debug_release_queue_dump(struct inode *inode, struct file *file)
 255 {
 256         struct rt2x00debug_intf *intf = inode->i_private;
 257
 258         skb_queue_purge(&intf->frame_dump_skbqueue);
 259
 260         clear_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags);
 261
 262         return rt2x00debug_file_release(inode, file);
 263 }
 264
 265 static ssize_t rt2x00debug_read_queue_dump(struct file *file,
 266                                            char __user *buf,
 267                                            size_t length,
 268                                            loff_t *offset)
 269 {
 270         struct rt2x00debug_intf *intf = file->private_data;
 271         struct sk_buff *skb;
 272         size_t status;
 273         int retval;
 274
 275         if (file->f_flags & O_NONBLOCK)
 276                 return -EAGAIN;
 277
 278         retval =
 279             wait_event_interruptible(intf->frame_dump_waitqueue,
 280                                      (skb =
 281                                      skb_dequeue(&intf->frame_dump_skbqueue)));
 282         if (retval)
 283                 return retval;
 284
 285         status = min((size_t)skb->len, length);
 286         if (copy_to_user(buf, skb->data, status)) {
 287                 status = -EFAULT;
 288                 goto exit;
 289         }
 290
 291         *offset += status;
 292
 293 exit:
 294         kfree_skb(skb);
 295
 296         return status;
 297 }
 298
 299 static unsigned int rt2x00debug_poll_queue_dump(struct file *file,
 300                                                 poll_table *wait)
 301 {
 302         struct rt2x00debug_intf *intf = file->private_data;
 303
 304         poll_wait(file, &intf->frame_dump_waitqueue, wait);
 305
 306         if (!skb_queue_empty(&intf->frame_dump_skbqueue))
 307                 return POLLOUT | POLLWRNORM;
 308
 309         return 0;
 310 }
 311
 312 static const struct file_operations rt2x00debug_fop_queue_dump = {
 313         .owner          = THIS_MODULE,
 314         .read           = rt2x00debug_read_queue_dump,
 315         .poll           = rt2x00debug_poll_queue_dump,
 316         .open           = rt2x00debug_open_queue_dump,
 317         .release        = rt2x00debug_release_queue_dump,
 318         .llseek         = default_llseek,
 319 };
 320
 321 static ssize_t rt2x00debug_read_queue_stats(struct file *file,
 322                                             char __user *buf,
 323                                             size_t length,
 324                                             loff_t *offset)
 325 {
 326         struct rt2x00debug_intf *intf = file->private_data;
 327         struct data_queue *queue;
 328         unsigned long irqflags;
 329         unsigned int lines = 1 + intf->rt2x00dev->data_queues;
 330         size_t size;
 331         char *data;
 332         char *temp;
 333
 334         if (*offset)
 335                 return 0;
 336
 337         data = kcalloc(lines, MAX_LINE_LENGTH, GFP_KERNEL);
 338         if (!data)
 339                 return -ENOMEM;
 340
 341         temp = data +
 342             sprintf(data, "qid\tflags\t\tcount\tlimit\tlength\tindex\tdma done\tdone\n");
 343
 344         queue_for_each(intf->rt2x00dev, queue) {
 345                 spin_lock_irqsave(&queue->index_lock, irqflags);
 346
 347                 temp += sprintf(temp, "%d\t0x%.8x\t%d\t%d\t%d\t%d\t%d\t\t%d\n",
 348                                 queue->qid, (unsigned int)queue->flags,
 349                                 queue->count, queue->limit, queue->length,
 350                                 queue->index[Q_INDEX],
 351                                 queue->index[Q_INDEX_DMA_DONE],
 352                                 queue->index[Q_INDEX_DONE]);
 353
 354                 spin_unlock_irqrestore(&queue->index_lock, irqflags);
 355         }
 356
 357         size = strlen(data);
 358         size = min(size, length);
 359
 360         if (copy_to_user(buf, data, size)) {
 361                 kfree(data);
 362                 return -EFAULT;
 363         }
 364
 365         kfree(data);
 366
 367         *offset += size;
 368         return size;
 369 }
 370
 371 static const struct file_operations rt2x00debug_fop_queue_stats = {
 372         .owner          = THIS_MODULE,
 373         .read           = rt2x00debug_read_queue_stats,
 374         .open           = rt2x00debug_file_open,
 375         .release        = rt2x00debug_file_release,
 376         .llseek         = default_llseek,
 377 };
 378
 379 #ifdef CONFIG_RT2X00_LIB_CRYPTO
 380 static ssize_t rt2x00debug_read_crypto_stats(struct file *file,
 381                                              char __user *buf,
 382                                              size_t length,
 383                                              loff_t *offset)
 384 {
 385         struct rt2x00debug_intf *intf = file->private_data;
 386         static const char * const name[] = { "WEP64", "WEP128", "TKIP", "AES" };
 387         char *data;
 388         char *temp;
 389         size_t size;
 390         unsigned int i;
 391
 392         if (*offset)
 393                 return 0;
 394
 395         data = kzalloc((1 + CIPHER_MAX) * MAX_LINE_LENGTH, GFP_KERNEL);
 396         if (!data)
 397                 return -ENOMEM;
 398
 399         temp = data;
 400         temp += sprintf(data, "cipher\tsuccess\ticv err\tmic err\tkey err\n");
 401
 402         for (i = 0; i < CIPHER_MAX; i++) {
 403                 temp += sprintf(temp, "%s\t%lu\t%lu\t%lu\t%lu\n", name[i],
 404                                 intf->crypto_stats[i].success,
 405                                 intf->crypto_stats[i].icv_error,
 406                                 intf->crypto_stats[i].mic_error,
 407                                 intf->crypto_stats[i].key_error);
 408         }
 409
 410         size = strlen(data);
 411         size = min(size, length);
 412
 413         if (copy_to_user(buf, data, size)) {
 414                 kfree(data);
 415                 return -EFAULT;
 416         }
 417
 418         kfree(data);
 419
 420         *offset += size;
 421         return size;
 422 }
 423
 424 static const struct file_operations rt2x00debug_fop_crypto_stats = {
 425         .owner          = THIS_MODULE,
 426         .read           = rt2x00debug_read_crypto_stats,
 427         .open           = rt2x00debug_file_open,
 428         .release        = rt2x00debug_file_release,
 429         .llseek         = default_llseek,
 430 };
 431 #endif
 432
 433 #define RT2X00DEBUGFS_OPS_READ(__name, __format, __type)        \
 434 static ssize_t rt2x00debug_read_##__name(struct file *file,     \
 435                                          char __user *buf,      \
 436                                          size_t length,         \
 437                                          loff_t *offset)        \
 438 {                                                               \
 439         struct rt2x00debug_intf *intf = file->private_data;     \
 440         const struct rt2x00debug *debug = intf->debug;          \
 441         char line[16];                                          \
 442         size_t size;                                            \
 443         unsigned int index = intf->offset_##__name;             \
 444         __type value;                                           \
 445                                                                 \
 446         if (*offset)                                            \
 447                 return 0;                                       \
 448                                                                 \
 449         if (index >= debug->__name.word_count)                  \
 450                 return -EINVAL;                                 \
 451                                                                 \
 452         index += (debug->__name.word_base /                     \
 453                   debug->__name.word_size);                     \
 454                                                                 \
 455         if (debug->__name.flags & RT2X00DEBUGFS_OFFSET)         \
 456                 index *= debug->__name.word_size;               \
 457                                                                 \
 458         debug->__name.read(intf->rt2x00dev, index, &value);     \
 459                                                                 \
 460         size = sprintf(line, __format, value);                  \
 461                                                                 \
 462         if (copy_to_user(buf, line, size))                      \
 463                 return -EFAULT;                                 \
 464                                                                 \
 465         *offset += size;                                        \
 466         return size;                                            \
 467 }
 468
 469 #define RT2X00DEBUGFS_OPS_WRITE(__name, __type)                 \
 470 static ssize_t rt2x00debug_write_##__name(struct file *file,    \
 471                                           const char __user *buf,\
 472                                           size_t length,        \
 473                                           loff_t *offset)       \
 474 {                                                               \
 475         struct rt2x00debug_intf *intf = file->private_data;     \
 476         const struct rt2x00debug *debug = intf->debug;          \
 477         char line[16];                                          \
 478         size_t size;                                            \
 479         unsigned int index = intf->offset_##__name;             \
 480         __type value;                                           \
 481                                                                 \
 482         if (*offset)                                            \
 483                 return 0;                                       \
 484                                                                 \
 485         if (index >= debug->__name.word_count)                  \
 486                 return -EINVAL;                                 \
 487                                                                 \
 488         if (length > sizeof(line))                              \
 489                 return -EINVAL;                                 \
 490                                                                 \
 491         if (copy_from_user(line, buf, length))                  \
 492                 return -EFAULT;                                 \
 493                                                                 \
 494         size = strlen(line);                                    \
 495         value = simple_strtoul(line, NULL, 0);                  \
 496                                                                 \
 497         index += (debug->__name.word_base /                     \
 498                   debug->__name.word_size);                     \
 499                                                                 \
 500         if (debug->__name.flags & RT2X00DEBUGFS_OFFSET)         \
 501                 index *= debug->__name.word_size;               \
 502                                                                 \
 503         debug->__name.write(intf->rt2x00dev, index, value);     \
 504                                                                 \
 505         *offset += size;                                        \
 506         return size;                                            \
 507 }
 508
 509 #define RT2X00DEBUGFS_OPS(__name, __format, __type)             \
 510 RT2X00DEBUGFS_OPS_READ(__name, __format, __type);               \
 511 RT2X00DEBUGFS_OPS_WRITE(__name, __type);                        \
 512                                                                 \
 513 static const struct file_operations rt2x00debug_fop_##__name = {\
 514         .owner          = THIS_MODULE,                          \
 515         .read           = rt2x00debug_read_##__name,            \
 516         .write          = rt2x00debug_write_##__name,           \
 517         .open           = rt2x00debug_file_open,                \
 518         .release        = rt2x00debug_file_release,             \
 519         .llseek         = generic_file_llseek,                  \
 520 };
 521
 522 RT2X00DEBUGFS_OPS(csr, "0x%.8x\n", u32);
 523 RT2X00DEBUGFS_OPS(eeprom, "0x%.4x\n", u16);
 524 RT2X00DEBUGFS_OPS(bbp, "0x%.2x\n", u8);
 525 RT2X00DEBUGFS_OPS(rf, "0x%.8x\n", u32);
 526
 527 static ssize_t rt2x00debug_read_dev_flags(struct file *file,
 528                                           char __user *buf,
 529                                           size_t length,
 530                                           loff_t *offset)
 531 {
 532         struct rt2x00debug_intf *intf = file->private_data;
 533         char line[16];
 534         size_t size;
 535
 536         if (*offset)
 537                 return 0;
 538
 539         size = sprintf(line, "0x%.8x\n", (unsigned int)intf->rt2x00dev->flags);
 540
 541         if (copy_to_user(buf, line, size))
 542                 return -EFAULT;
 543
 544         *offset += size;
 545         return size;
 546 }
 547
 548 static const struct file_operations rt2x00debug_fop_dev_flags = {
 549         .owner          = THIS_MODULE,
 550         .read           = rt2x00debug_read_dev_flags,
 551         .open           = rt2x00debug_file_open,
 552         .release        = rt2x00debug_file_release,
 553         .llseek         = default_llseek,
 554 };
 555
 556 static struct dentry *rt2x00debug_create_file_driver(const char *name,
 557                                                      struct rt2x00debug_intf
 558                                                      *intf,
 559                                                      struct debugfs_blob_wrapper
 560                                                      *blob)
 561 {
 562         char *data;
 563
 564         data = kzalloc(3 * MAX_LINE_LENGTH, GFP_KERNEL);
 565         if (!data)
 566                 return NULL;
 567
 568         blob->data = data;
 569         data += sprintf(data, "driver:\t%s\n", intf->rt2x00dev->ops->name);
 570         data += sprintf(data, "version:\t%s\n", DRV_VERSION);
 571         data += sprintf(data, "compiled:\t%s %s\n", __DATE__, __TIME__);
 572         blob->size = strlen(blob->data);
 573
 574         return debugfs_create_blob(name, S_IRUSR, intf->driver_folder, blob);
 575 }
 576
 577 static struct dentry *rt2x00debug_create_file_chipset(const char *name,
 578                                                       struct rt2x00debug_intf
 579                                                       *intf,
 580                                                       struct
 581                                                       debugfs_blob_wrapper
 582                                                       *blob)
 583 {
 584         const struct rt2x00debug *debug = intf->debug;
 585         char *data;
 586
 587         data = kzalloc(8 * MAX_LINE_LENGTH, GFP_KERNEL);
 588         if (!data)
 589                 return NULL;
 590
 591         blob->data = data;
 592         data += sprintf(data, "rt chip:\t%04x\n", intf->rt2x00dev->chip.rt);
 593         data += sprintf(data, "rf chip:\t%04x\n", intf->rt2x00dev->chip.rf);
 594         data += sprintf(data, "revision:\t%04x\n", intf->rt2x00dev->chip.rev);
 595         data += sprintf(data, "\n");
 596         data += sprintf(data, "register\tbase\twords\twordsize\n");
 597         data += sprintf(data, "csr\t%d\t%d\t%d\n",
 598                         debug->csr.word_base,
 599                         debug->csr.word_count,
 600                         debug->csr.word_size);
 601         data += sprintf(data, "eeprom\t%d\t%d\t%d\n",
 602                         debug->eeprom.word_base,
 603                         debug->eeprom.word_count,
 604                         debug->eeprom.word_size);
 605         data += sprintf(data, "bbp\t%d\t%d\t%d\n",
 606                         debug->bbp.word_base,
 607                         debug->bbp.word_count,
 608                         debug->bbp.word_size);
 609         data += sprintf(data, "rf\t%d\t%d\t%d\n",
 610                         debug->rf.word_base,
 611                         debug->rf.word_count,
 612                         debug->rf.word_size);
 613         blob->size = strlen(blob->data);
 614
 615         return debugfs_create_blob(name, S_IRUSR, intf->driver_folder, blob);
 616 }
 617
 618 void rt2x00debug_register(struct rt2x00_dev *rt2x00dev)
 619 {
 620         const struct rt2x00debug *debug = rt2x00dev->ops->debugfs;
 621         struct rt2x00debug_intf *intf;
 622
 623         intf = kzalloc(sizeof(struct rt2x00debug_intf), GFP_KERNEL);
 624         if (!intf) {
 625                 ERROR(rt2x00dev, "Failed to allocate debug handler.\n");
 626                 return;
 627         }
 628
 629         intf->debug = debug;
 630         intf->rt2x00dev = rt2x00dev;
 631         rt2x00dev->debugfs_intf = intf;
 632
 633         intf->driver_folder =
 634             debugfs_create_dir(intf->rt2x00dev->ops->name,
 635                                rt2x00dev->hw->wiphy->debugfsdir);
 636         if (IS_ERR(intf->driver_folder) || !intf->driver_folder)
 637                 goto exit;
 638
 639         intf->driver_entry =
 640             rt2x00debug_create_file_driver("driver", intf, &intf->driver_blob);
 641         if (IS_ERR(intf->driver_entry) || !intf->driver_entry)
 642                 goto exit;
 643
 644         intf->chipset_entry =
 645             rt2x00debug_create_file_chipset("chipset",
 646                                             intf, &intf->chipset_blob);
 647         if (IS_ERR(intf->chipset_entry) || !intf->chipset_entry)
 648                 goto exit;
 649
 650         intf->dev_flags = debugfs_create_file("dev_flags", S_IRUSR,
 651                                               intf->driver_folder, intf,
 652                                               &rt2x00debug_fop_dev_flags);
 653         if (IS_ERR(intf->dev_flags) || !intf->dev_flags)
 654                 goto exit;
 655
 656         intf->register_folder =
 657             debugfs_create_dir("register", intf->driver_folder);
 658         if (IS_ERR(intf->register_folder) || !intf->register_folder)
 659                 goto exit;
 660
 661 #define RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(__intf, __name)     \
 662 ({                                                              \
 663         (__intf)->__name##_off_entry =                          \
 664             debugfs_create_u32(__stringify(__name) "_offset",   \
 665                                S_IRUSR | S_IWUSR,               \
 666                                (__intf)->register_folder,       \
 667                                &(__intf)->offset_##__name);     \
 668         if (IS_ERR((__intf)->__name##_off_entry)                \
 669                         || !(__intf)->__name##_off_entry)       \
 670                 goto exit;                                      \
 671                                                                 \
 672         (__intf)->__name##_val_entry =                          \
 673             debugfs_create_file(__stringify(__name) "_value",   \
 674                                 S_IRUSR | S_IWUSR,              \
 675                                 (__intf)->register_folder,      \
 676                                 (__intf), &rt2x00debug_fop_##__name);\
 677         if (IS_ERR((__intf)->__name##_val_entry)                \
 678                         || !(__intf)->__name##_val_entry)       \
 679                 goto exit;                                      \
 680 })
 681
 682         RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, csr);
 683         RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, eeprom);
 684         RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, bbp);
 685         RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, rf);
 686
 687 #undef RT2X00DEBUGFS_CREATE_REGISTER_ENTRY
 688
 689         intf->queue_folder =
 690             debugfs_create_dir("queue", intf->driver_folder);
 691         if (IS_ERR(intf->queue_folder) || !intf->queue_folder)
 692                 goto exit;
 693
 694         intf->queue_frame_dump_entry =
 695             debugfs_create_file("dump", S_IRUSR, intf->queue_folder,
 696                                 intf, &rt2x00debug_fop_queue_dump);
 697         if (IS_ERR(intf->queue_frame_dump_entry)
 698                 || !intf->queue_frame_dump_entry)
 699                 goto exit;
 700
 701         skb_queue_head_init(&intf->frame_dump_skbqueue);
 702         init_waitqueue_head(&intf->frame_dump_waitqueue);
 703
 704         intf->queue_stats_entry =
 705             debugfs_create_file("queue", S_IRUSR, intf->queue_folder,
 706                                 intf, &rt2x00debug_fop_queue_stats);
 707
 708 #ifdef CONFIG_RT2X00_LIB_CRYPTO
 709         if (test_bit(CONFIG_SUPPORT_HW_CRYPTO, &rt2x00dev->flags))
 710                 intf->crypto_stats_entry =
 711                     debugfs_create_file("crypto", S_IRUGO, intf->queue_folder,
 712                                         intf, &rt2x00debug_fop_crypto_stats);
 713 #endif
 714
 715         return;
 716
 717 exit:
 718         rt2x00debug_deregister(rt2x00dev);
 719         ERROR(rt2x00dev, "Failed to register debug handler.\n");
 720 }
 721
 722 void rt2x00debug_deregister(struct rt2x00_dev *rt2x00dev)
 723 {
 724         struct rt2x00debug_intf *intf = rt2x00dev->debugfs_intf;
 725
 726         if (unlikely(!intf))
 727                 return;
 728
 729         skb_queue_purge(&intf->frame_dump_skbqueue);
 730
 731 #ifdef CONFIG_RT2X00_LIB_CRYPTO
 732         debugfs_remove(intf->crypto_stats_entry);
 733 #endif
 734         debugfs_remove(intf->queue_stats_entry);
 735         debugfs_remove(intf->queue_frame_dump_entry);
 736         debugfs_remove(intf->queue_folder);
 737         debugfs_remove(intf->rf_val_entry);
 738         debugfs_remove(intf->rf_off_entry);
 739         debugfs_remove(intf->bbp_val_entry);
 740         debugfs_remove(intf->bbp_off_entry);
 741         debugfs_remove(intf->eeprom_val_entry);
 742         debugfs_remove(intf->eeprom_off_entry);
 743         debugfs_remove(intf->csr_val_entry);
 744         debugfs_remove(intf->csr_off_entry);
 745         debugfs_remove(intf->register_folder);
 746         debugfs_remove(intf->dev_flags);
 747         debugfs_remove(intf->chipset_entry);
 748         debugfs_remove(intf->driver_entry);
 749         debugfs_remove(intf->driver_folder);
 750         kfree(intf->chipset_blob.data);
 751         kfree(intf->driver_blob.data);
 752         kfree(intf);
 753
 754         rt2x00dev->debugfs_intf = NULL;
 755 }