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 state flags file
  67          *   - device capability flags file
  68          *   - register folder
  69          *     - csr offset/value files
  70          *     - eeprom offset/value files
  71          *     - bbp offset/value files
  72          *     - rf offset/value files
  73          *   - queue folder
  74          *     - frame dump file
  75          *     - queue stats file
  76          *     - crypto stats file
  77          */
  78         struct dentry *driver_folder;
  79         struct dentry *driver_entry;
  80         struct dentry *chipset_entry;
  81         struct dentry *dev_flags;
  82         struct dentry *cap_flags;
  83         struct dentry *register_folder;
  84         struct dentry *csr_off_entry;
  85         struct dentry *csr_val_entry;
  86         struct dentry *eeprom_off_entry;
  87         struct dentry *eeprom_val_entry;
  88         struct dentry *bbp_off_entry;
  89         struct dentry *bbp_val_entry;
  90         struct dentry *rf_off_entry;
  91         struct dentry *rf_val_entry;
  92         struct dentry *queue_folder;
  93         struct dentry *queue_frame_dump_entry;
  94         struct dentry *queue_stats_entry;
  95         struct dentry *crypto_stats_entry;
  96
  97         /*
  98          * The frame dump file only allows a single reader,
  99          * so we need to store the current state here.
 100          */
 101         unsigned long frame_dump_flags;
 102 #define FRAME_DUMP_FILE_OPEN    1
 103
 104         /*
 105          * We queue each frame before dumping it to the user,
 106          * per read command we will pass a single skb structure
 107          * so we should be prepared to queue multiple sk buffers
 108          * before sending it to userspace.
 109          */
 110         struct sk_buff_head frame_dump_skbqueue;
 111         wait_queue_head_t frame_dump_waitqueue;
 112
 113         /*
 114          * HW crypto statistics.
 115          * All statistics are stored separately per cipher type.
 116          */
 117         struct rt2x00debug_crypto crypto_stats[CIPHER_MAX];
 118
 119         /*
 120          * Driver and chipset files will use a data buffer
 121          * that has been created in advance. This will simplify
 122          * the code since we can use the debugfs functions.
 123          */
 124         struct debugfs_blob_wrapper driver_blob;
 125         struct debugfs_blob_wrapper chipset_blob;
 126
 127         /*
 128          * Requested offset for each register type.
 129          */
 130         unsigned int offset_csr;
 131         unsigned int offset_eeprom;
 132         unsigned int offset_bbp;
 133         unsigned int offset_rf;
 134 };
 135
 136 void rt2x00debug_update_crypto(struct rt2x00_dev *rt2x00dev,
 137                                struct rxdone_entry_desc *rxdesc)
 138 {
 139         struct rt2x00debug_intf *intf = rt2x00dev->debugfs_intf;
 140         enum cipher cipher = rxdesc->cipher;
 141         enum rx_crypto status = rxdesc->cipher_status;
 142
 143         if (cipher == CIPHER_TKIP_NO_MIC)
 144                 cipher = CIPHER_TKIP;
 145         if (cipher == CIPHER_NONE || cipher >= CIPHER_MAX)
 146                 return;
 147
 148         /* Remove CIPHER_NONE index */
 149         cipher--;
 150
 151         intf->crypto_stats[cipher].success += (status == RX_CRYPTO_SUCCESS);
 152         intf->crypto_stats[cipher].icv_error += (status == RX_CRYPTO_FAIL_ICV);
 153         intf->crypto_stats[cipher].mic_error += (status == RX_CRYPTO_FAIL_MIC);
 154         intf->crypto_stats[cipher].key_error += (status == RX_CRYPTO_FAIL_KEY);
 155 }
 156
 157 void rt2x00debug_dump_frame(struct rt2x00_dev *rt2x00dev,
 158                             enum rt2x00_dump_type type, struct sk_buff *skb)
 159 {
 160         struct rt2x00debug_intf *intf = rt2x00dev->debugfs_intf;
 161         struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb);
 162         struct sk_buff *skbcopy;
 163         struct rt2x00dump_hdr *dump_hdr;
 164         struct timeval timestamp;
 165         u32 data_len;
 166
 167         if (likely(!test_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags)))
 168                 return;
 169
 170         do_gettimeofday(&timestamp);
 171
 172         if (skb_queue_len(&intf->frame_dump_skbqueue) > 20) {
 173                 DEBUG(rt2x00dev, "txrx dump queue length exceeded.\n");
 174                 return;
 175         }
 176
 177         data_len = skb->len;
 178         if (skbdesc->flags & SKBDESC_DESC_IN_SKB)
 179                 data_len -= skbdesc->desc_len;
 180
 181         skbcopy = alloc_skb(sizeof(*dump_hdr) + skbdesc->desc_len + data_len,
 182                             GFP_ATOMIC);
 183         if (!skbcopy) {
 184                 DEBUG(rt2x00dev, "Failed to copy skb for dump.\n");
 185                 return;
 186         }
 187
 188         dump_hdr = (struct rt2x00dump_hdr *)skb_put(skbcopy, sizeof(*dump_hdr));
 189         dump_hdr->version = cpu_to_le32(DUMP_HEADER_VERSION);
 190         dump_hdr->header_length = cpu_to_le32(sizeof(*dump_hdr));
 191         dump_hdr->desc_length = cpu_to_le32(skbdesc->desc_len);
 192         dump_hdr->data_length = cpu_to_le32(data_len);
 193         dump_hdr->chip_rt = cpu_to_le16(rt2x00dev->chip.rt);
 194         dump_hdr->chip_rf = cpu_to_le16(rt2x00dev->chip.rf);
 195         dump_hdr->chip_rev = cpu_to_le16(rt2x00dev->chip.rev);
 196         dump_hdr->type = cpu_to_le16(type);
 197         dump_hdr->queue_index = skbdesc->entry->queue->qid;
 198         dump_hdr->entry_index = skbdesc->entry->entry_idx;
 199         dump_hdr->timestamp_sec = cpu_to_le32(timestamp.tv_sec);
 200         dump_hdr->timestamp_usec = cpu_to_le32(timestamp.tv_usec);
 201
 202         if (!(skbdesc->flags & SKBDESC_DESC_IN_SKB))
 203                 memcpy(skb_put(skbcopy, skbdesc->desc_len), skbdesc->desc,
 204                        skbdesc->desc_len);
 205         memcpy(skb_put(skbcopy, skb->len), skb->data, skb->len);
 206
 207         skb_queue_tail(&intf->frame_dump_skbqueue, skbcopy);
 208         wake_up_interruptible(&intf->frame_dump_waitqueue);
 209
 210         /*
 211          * Verify that the file has not been closed while we were working.
 212          */
 213         if (!test_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags))
 214                 skb_queue_purge(&intf->frame_dump_skbqueue);
 215 }
 216 EXPORT_SYMBOL_GPL(rt2x00debug_dump_frame);
 217
 218 static int rt2x00debug_file_open(struct inode *inode, struct file *file)
 219 {
 220         struct rt2x00debug_intf *intf = inode->i_private;
 221
 222         file->private_data = inode->i_private;
 223
 224         if (!try_module_get(intf->debug->owner))
 225                 return -EBUSY;
 226
 227         return 0;
 228 }
 229
 230 static int rt2x00debug_file_release(struct inode *inode, struct file *file)
 231 {
 232         struct rt2x00debug_intf *intf = file->private_data;
 233
 234         module_put(intf->debug->owner);
 235
 236         return 0;
 237 }
 238
 239 static int rt2x00debug_open_queue_dump(struct inode *inode, struct file *file)
 240 {
 241         struct rt2x00debug_intf *intf = inode->i_private;
 242         int retval;
 243
 244         retval = rt2x00debug_file_open(inode, file);
 245         if (retval)
 246                 return retval;
 247
 248         if (test_and_set_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags)) {
 249                 rt2x00debug_file_release(inode, file);
 250                 return -EBUSY;
 251         }
 252
 253         return 0;
 254 }
 255
 256 static int rt2x00debug_release_queue_dump(struct inode *inode, struct file *file)
 257 {
 258         struct rt2x00debug_intf *intf = inode->i_private;
 259
 260         skb_queue_purge(&intf->frame_dump_skbqueue);
 261
 262         clear_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags);
 263
 264         return rt2x00debug_file_release(inode, file);
 265 }
 266
 267 static ssize_t rt2x00debug_read_queue_dump(struct file *file,
 268                                            char __user *buf,
 269                                            size_t length,
 270                                            loff_t *offset)
 271 {
 272         struct rt2x00debug_intf *intf = file->private_data;
 273         struct sk_buff *skb;
 274         size_t status;
 275         int retval;
 276
 277         if (file->f_flags & O_NONBLOCK)
 278                 return -EAGAIN;
 279
 280         retval =
 281             wait_event_interruptible(intf->frame_dump_waitqueue,
 282                                      (skb =
 283                                      skb_dequeue(&intf->frame_dump_skbqueue)));
 284         if (retval)
 285                 return retval;
 286
 287         status = min((size_t)skb->len, length);
 288         if (copy_to_user(buf, skb->data, status)) {
 289                 status = -EFAULT;
 290                 goto exit;
 291         }
 292
 293         *offset += status;
 294
 295 exit:
 296         kfree_skb(skb);
 297
 298         return status;
 299 }
 300
 301 static unsigned int rt2x00debug_poll_queue_dump(struct file *file,
 302                                                 poll_table *wait)
 303 {
 304         struct rt2x00debug_intf *intf = file->private_data;
 305
 306         poll_wait(file, &intf->frame_dump_waitqueue, wait);
 307
 308         if (!skb_queue_empty(&intf->frame_dump_skbqueue))
 309                 return POLLOUT | POLLWRNORM;
 310
 311         return 0;
 312 }
 313
 314 static const struct file_operations rt2x00debug_fop_queue_dump = {
 315         .owner          = THIS_MODULE,
 316         .read           = rt2x00debug_read_queue_dump,
 317         .poll           = rt2x00debug_poll_queue_dump,
 318         .open           = rt2x00debug_open_queue_dump,
 319         .release        = rt2x00debug_release_queue_dump,
 320         .llseek         = default_llseek,
 321 };
 322
 323 static ssize_t rt2x00debug_read_queue_stats(struct file *file,
 324                                             char __user *buf,
 325                                             size_t length,
 326                                             loff_t *offset)
 327 {
 328         struct rt2x00debug_intf *intf = file->private_data;
 329         struct data_queue *queue;
 330         unsigned long irqflags;
 331         unsigned int lines = 1 + intf->rt2x00dev->data_queues;
 332         size_t size;
 333         char *data;
 334         char *temp;
 335
 336         if (*offset)
 337                 return 0;
 338
 339         data = kcalloc(lines, MAX_LINE_LENGTH, GFP_KERNEL);
 340         if (!data)
 341                 return -ENOMEM;
 342
 343         temp = data +
 344             sprintf(data, "qid\tflags\t\tcount\tlimit\tlength\tindex\tdma done\tdone\n");
 345
 346         queue_for_each(intf->rt2x00dev, queue) {
 347                 spin_lock_irqsave(&queue->index_lock, irqflags);
 348
 349                 temp += sprintf(temp, "%d\t0x%.8x\t%d\t%d\t%d\t%d\t%d\t\t%d\n",
 350                                 queue->qid, (unsigned int)queue->flags,
 351                                 queue->count, queue->limit, queue->length,
 352                                 queue->index[Q_INDEX],
 353                                 queue->index[Q_INDEX_DMA_DONE],
 354                                 queue->index[Q_INDEX_DONE]);
 355
 356                 spin_unlock_irqrestore(&queue->index_lock, irqflags);
 357         }
 358
 359         size = strlen(data);
 360         size = min(size, length);
 361
 362         if (copy_to_user(buf, data, size)) {
 363                 kfree(data);
 364                 return -EFAULT;
 365         }
 366
 367         kfree(data);
 368
 369         *offset += size;
 370         return size;
 371 }
 372
 373 static const struct file_operations rt2x00debug_fop_queue_stats = {
 374         .owner          = THIS_MODULE,
 375         .read           = rt2x00debug_read_queue_stats,
 376         .open           = rt2x00debug_file_open,
 377         .release        = rt2x00debug_file_release,
 378         .llseek         = default_llseek,
 379 };
 380
 381 #ifdef CONFIG_RT2X00_LIB_CRYPTO
 382 static ssize_t rt2x00debug_read_crypto_stats(struct file *file,
 383                                              char __user *buf,
 384                                              size_t length,
 385                                              loff_t *offset)
 386 {
 387         struct rt2x00debug_intf *intf = file->private_data;
 388         static const char * const name[] = { "WEP64", "WEP128", "TKIP", "AES" };
 389         char *data;
 390         char *temp;
 391         size_t size;
 392         unsigned int i;
 393
 394         if (*offset)
 395                 return 0;
 396
 397         data = kzalloc((1 + CIPHER_MAX) * MAX_LINE_LENGTH, GFP_KERNEL);
 398         if (!data)
 399                 return -ENOMEM;
 400
 401         temp = data;
 402         temp += sprintf(data, "cipher\tsuccess\ticv err\tmic err\tkey err\n");
 403
 404         for (i = 0; i < CIPHER_MAX; i++) {
 405                 temp += sprintf(temp, "%s\t%lu\t%lu\t%lu\t%lu\n", name[i],
 406                                 intf->crypto_stats[i].success,
 407                                 intf->crypto_stats[i].icv_error,
 408                                 intf->crypto_stats[i].mic_error,
 409                                 intf->crypto_stats[i].key_error);
 410         }
 411
 412         size = strlen(data);
 413         size = min(size, length);
 414
 415         if (copy_to_user(buf, data, size)) {
 416                 kfree(data);
 417                 return -EFAULT;
 418         }
 419
 420         kfree(data);
 421
 422         *offset += size;
 423         return size;
 424 }
 425
 426 static const struct file_operations rt2x00debug_fop_crypto_stats = {
 427         .owner          = THIS_MODULE,
 428         .read           = rt2x00debug_read_crypto_stats,
 429         .open           = rt2x00debug_file_open,
 430         .release        = rt2x00debug_file_release,
 431         .llseek         = default_llseek,
 432 };
 433 #endif
 434
 435 #define RT2X00DEBUGFS_OPS_READ(__name, __format, __type)        \
 436 static ssize_t rt2x00debug_read_##__name(struct file *file,     \
 437                                          char __user *buf,      \
 438                                          size_t length,         \
 439                                          loff_t *offset)        \
 440 {                                                               \
 441         struct rt2x00debug_intf *intf = file->private_data;     \
 442         const struct rt2x00debug *debug = intf->debug;          \
 443         char line[16];                                          \
 444         size_t size;                                            \
 445         unsigned int index = intf->offset_##__name;             \
 446         __type value;                                           \
 447                                                                 \
 448         if (*offset)                                            \
 449                 return 0;                                       \
 450                                                                 \
 451         if (index >= debug->__name.word_count)                  \
 452                 return -EINVAL;                                 \
 453                                                                 \
 454         index += (debug->__name.word_base /                     \
 455                   debug->__name.word_size);                     \
 456                                                                 \
 457         if (debug->__name.flags & RT2X00DEBUGFS_OFFSET)         \
 458                 index *= debug->__name.word_size;               \
 459                                                                 \
 460         debug->__name.read(intf->rt2x00dev, index, &value);     \
 461                                                                 \
 462         size = sprintf(line, __format, value);                  \
 463                                                                 \
 464         if (copy_to_user(buf, line, size))                      \
 465                 return -EFAULT;                                 \
 466                                                                 \
 467         *offset += size;                                        \
 468         return size;                                            \
 469 }
 470
 471 #define RT2X00DEBUGFS_OPS_WRITE(__name, __type)                 \
 472 static ssize_t rt2x00debug_write_##__name(struct file *file,    \
 473                                           const char __user *buf,\
 474                                           size_t length,        \
 475                                           loff_t *offset)       \
 476 {                                                               \
 477         struct rt2x00debug_intf *intf = file->private_data;     \
 478         const struct rt2x00debug *debug = intf->debug;          \
 479         char line[16];                                          \
 480         size_t size;                                            \
 481         unsigned int index = intf->offset_##__name;             \
 482         __type value;                                           \
 483                                                                 \
 484         if (*offset)                                            \
 485                 return 0;                                       \
 486                                                                 \
 487         if (index >= debug->__name.word_count)                  \
 488                 return -EINVAL;                                 \
 489                                                                 \
 490         if (length > sizeof(line))                              \
 491                 return -EINVAL;                                 \
 492                                                                 \
 493         if (copy_from_user(line, buf, length))                  \
 494                 return -EFAULT;                                 \
 495                                                                 \
 496         size = strlen(line);                                    \
 497         value = simple_strtoul(line, NULL, 0);                  \
 498                                                                 \
 499         index += (debug->__name.word_base /                     \
 500                   debug->__name.word_size);                     \
 501                                                                 \
 502         if (debug->__name.flags & RT2X00DEBUGFS_OFFSET)         \
 503                 index *= debug->__name.word_size;               \
 504                                                                 \
 505         debug->__name.write(intf->rt2x00dev, index, value);     \
 506                                                                 \
 507         *offset += size;                                        \
 508         return size;                                            \
 509 }
 510
 511 #define RT2X00DEBUGFS_OPS(__name, __format, __type)             \
 512 RT2X00DEBUGFS_OPS_READ(__name, __format, __type);               \
 513 RT2X00DEBUGFS_OPS_WRITE(__name, __type);                        \
 514                                                                 \
 515 static const struct file_operations rt2x00debug_fop_##__name = {\
 516         .owner          = THIS_MODULE,                          \
 517         .read           = rt2x00debug_read_##__name,            \
 518         .write          = rt2x00debug_write_##__name,           \
 519         .open           = rt2x00debug_file_open,                \
 520         .release        = rt2x00debug_file_release,             \
 521         .llseek         = generic_file_llseek,                  \
 522 };
 523
 524 RT2X00DEBUGFS_OPS(csr, "0x%.8x\n", u32);
 525 RT2X00DEBUGFS_OPS(eeprom, "0x%.4x\n", u16);
 526 RT2X00DEBUGFS_OPS(bbp, "0x%.2x\n", u8);
 527 RT2X00DEBUGFS_OPS(rf, "0x%.8x\n", u32);
 528
 529 static ssize_t rt2x00debug_read_dev_flags(struct file *file,
 530                                           char __user *buf,
 531                                           size_t length,
 532                                           loff_t *offset)
 533 {
 534         struct rt2x00debug_intf *intf = file->private_data;
 535         char line[16];
 536         size_t size;
 537
 538         if (*offset)
 539                 return 0;
 540
 541         size = sprintf(line, "0x%.8x\n", (unsigned int)intf->rt2x00dev->flags);
 542
 543         if (copy_to_user(buf, line, size))
 544                 return -EFAULT;
 545
 546         *offset += size;
 547         return size;
 548 }
 549
 550 static const struct file_operations rt2x00debug_fop_dev_flags = {
 551         .owner          = THIS_MODULE,
 552         .read           = rt2x00debug_read_dev_flags,
 553         .open           = rt2x00debug_file_open,
 554         .release        = rt2x00debug_file_release,
 555         .llseek         = default_llseek,
 556 };
 557
 558 static ssize_t rt2x00debug_read_cap_flags(struct file *file,
 559                                           char __user *buf,
 560                                           size_t length,
 561                                           loff_t *offset)
 562 {
 563         struct rt2x00debug_intf *intf = file->private_data;
 564         char line[16];
 565         size_t size;
 566
 567         if (*offset)
 568                 return 0;
 569
 570         size = sprintf(line, "0x%.8x\n", (unsigned int)intf->rt2x00dev->cap_flags);
 571
 572         if (copy_to_user(buf, line, size))
 573                 return -EFAULT;
 574
 575         *offset += size;
 576         return size;
 577 }
 578
 579 static const struct file_operations rt2x00debug_fop_cap_flags = {
 580         .owner          = THIS_MODULE,
 581         .read           = rt2x00debug_read_cap_flags,
 582         .open           = rt2x00debug_file_open,
 583         .release        = rt2x00debug_file_release,
 584         .llseek         = default_llseek,
 585 };
 586
 587 static struct dentry *rt2x00debug_create_file_driver(const char *name,
 588                                                      struct rt2x00debug_intf
 589                                                      *intf,
 590                                                      struct debugfs_blob_wrapper
 591                                                      *blob)
 592 {
 593         char *data;
 594
 595         data = kzalloc(3 * MAX_LINE_LENGTH, GFP_KERNEL);
 596         if (!data)
 597                 return NULL;
 598
 599         blob->data = data;
 600         data += sprintf(data, "driver:\t%s\n", intf->rt2x00dev->ops->name);
 601         data += sprintf(data, "version:\t%s\n", DRV_VERSION);
 602         blob->size = strlen(blob->data);
 603
 604         return debugfs_create_blob(name, S_IRUSR, intf->driver_folder, blob);
 605 }
 606
 607 static struct dentry *rt2x00debug_create_file_chipset(const char *name,
 608                                                       struct rt2x00debug_intf
 609                                                       *intf,
 610                                                       struct
 611                                                       debugfs_blob_wrapper
 612                                                       *blob)
 613 {
 614         const struct rt2x00debug *debug = intf->debug;
 615         char *data;
 616
 617         data = kzalloc(8 * MAX_LINE_LENGTH, GFP_KERNEL);
 618         if (!data)
 619                 return NULL;
 620
 621         blob->data = data;
 622         data += sprintf(data, "rt chip:\t%04x\n", intf->rt2x00dev->chip.rt);
 623         data += sprintf(data, "rf chip:\t%04x\n", intf->rt2x00dev->chip.rf);
 624         data += sprintf(data, "revision:\t%04x\n", intf->rt2x00dev->chip.rev);
 625         data += sprintf(data, "\n");
 626         data += sprintf(data, "register\tbase\twords\twordsize\n");
 627         data += sprintf(data, "csr\t%d\t%d\t%d\n",
 628                         debug->csr.word_base,
 629                         debug->csr.word_count,
 630                         debug->csr.word_size);
 631         data += sprintf(data, "eeprom\t%d\t%d\t%d\n",
 632                         debug->eeprom.word_base,
 633                         debug->eeprom.word_count,
 634                         debug->eeprom.word_size);
 635         data += sprintf(data, "bbp\t%d\t%d\t%d\n",
 636                         debug->bbp.word_base,
 637                         debug->bbp.word_count,
 638                         debug->bbp.word_size);
 639         data += sprintf(data, "rf\t%d\t%d\t%d\n",
 640                         debug->rf.word_base,
 641                         debug->rf.word_count,
 642                         debug->rf.word_size);
 643         blob->size = strlen(blob->data);
 644
 645         return debugfs_create_blob(name, S_IRUSR, intf->driver_folder, blob);
 646 }
 647
 648 void rt2x00debug_register(struct rt2x00_dev *rt2x00dev)
 649 {
 650         const struct rt2x00debug *debug = rt2x00dev->ops->debugfs;
 651         struct rt2x00debug_intf *intf;
 652
 653         intf = kzalloc(sizeof(struct rt2x00debug_intf), GFP_KERNEL);
 654         if (!intf) {
 655                 ERROR(rt2x00dev, "Failed to allocate debug handler.\n");
 656                 return;
 657         }
 658
 659         intf->debug = debug;
 660         intf->rt2x00dev = rt2x00dev;
 661         rt2x00dev->debugfs_intf = intf;
 662
 663         intf->driver_folder =
 664             debugfs_create_dir(intf->rt2x00dev->ops->name,
 665                                rt2x00dev->hw->wiphy->debugfsdir);
 666         if (IS_ERR(intf->driver_folder) || !intf->driver_folder)
 667                 goto exit;
 668
 669         intf->driver_entry =
 670             rt2x00debug_create_file_driver("driver", intf, &intf->driver_blob);
 671         if (IS_ERR(intf->driver_entry) || !intf->driver_entry)
 672                 goto exit;
 673
 674         intf->chipset_entry =
 675             rt2x00debug_create_file_chipset("chipset",
 676                                             intf, &intf->chipset_blob);
 677         if (IS_ERR(intf->chipset_entry) || !intf->chipset_entry)
 678                 goto exit;
 679
 680         intf->dev_flags = debugfs_create_file("dev_flags", S_IRUSR,
 681                                               intf->driver_folder, intf,
 682                                               &rt2x00debug_fop_dev_flags);
 683         if (IS_ERR(intf->dev_flags) || !intf->dev_flags)
 684                 goto exit;
 685
 686         intf->cap_flags = debugfs_create_file("cap_flags", S_IRUSR,
 687                                               intf->driver_folder, intf,
 688                                               &rt2x00debug_fop_cap_flags);
 689         if (IS_ERR(intf->cap_flags) || !intf->cap_flags)
 690                 goto exit;
 691
 692         intf->register_folder =
 693             debugfs_create_dir("register", intf->driver_folder);
 694         if (IS_ERR(intf->register_folder) || !intf->register_folder)
 695                 goto exit;
 696
 697 #define RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(__intf, __name)     \
 698 ({                                                              \
 699         (__intf)->__name##_off_entry =                          \
 700             debugfs_create_u32(__stringify(__name) "_offset",   \
 701                                S_IRUSR | S_IWUSR,               \
 702                                (__intf)->register_folder,       \
 703                                &(__intf)->offset_##__name);     \
 704         if (IS_ERR((__intf)->__name##_off_entry)                \
 705                         || !(__intf)->__name##_off_entry)       \
 706                 goto exit;                                      \
 707                                                                 \
 708         (__intf)->__name##_val_entry =                          \
 709             debugfs_create_file(__stringify(__name) "_value",   \
 710                                 S_IRUSR | S_IWUSR,              \
 711                                 (__intf)->register_folder,      \
 712                                 (__intf), &rt2x00debug_fop_##__name);\
 713         if (IS_ERR((__intf)->__name##_val_entry)                \
 714                         || !(__intf)->__name##_val_entry)       \
 715                 goto exit;                                      \
 716 })
 717
 718         RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, csr);
 719         RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, eeprom);
 720         RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, bbp);
 721         RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, rf);
 722
 723 #undef RT2X00DEBUGFS_CREATE_REGISTER_ENTRY
 724
 725         intf->queue_folder =
 726             debugfs_create_dir("queue", intf->driver_folder);
 727         if (IS_ERR(intf->queue_folder) || !intf->queue_folder)
 728                 goto exit;
 729
 730         intf->queue_frame_dump_entry =
 731             debugfs_create_file("dump", S_IRUSR, intf->queue_folder,
 732                                 intf, &rt2x00debug_fop_queue_dump);
 733         if (IS_ERR(intf->queue_frame_dump_entry)
 734                 || !intf->queue_frame_dump_entry)
 735                 goto exit;
 736
 737         skb_queue_head_init(&intf->frame_dump_skbqueue);
 738         init_waitqueue_head(&intf->frame_dump_waitqueue);
 739
 740         intf->queue_stats_entry =
 741             debugfs_create_file("queue", S_IRUSR, intf->queue_folder,
 742                                 intf, &rt2x00debug_fop_queue_stats);
 743
 744 #ifdef CONFIG_RT2X00_LIB_CRYPTO
 745         if (test_bit(CAPABILITY_HW_CRYPTO, &rt2x00dev->cap_flags))
 746                 intf->crypto_stats_entry =
 747                     debugfs_create_file("crypto", S_IRUGO, intf->queue_folder,
 748                                         intf, &rt2x00debug_fop_crypto_stats);
 749 #endif
 750
 751         return;
 752
 753 exit:
 754         rt2x00debug_deregister(rt2x00dev);
 755         ERROR(rt2x00dev, "Failed to register debug handler.\n");
 756 }
 757
 758 void rt2x00debug_deregister(struct rt2x00_dev *rt2x00dev)
 759 {
 760         struct rt2x00debug_intf *intf = rt2x00dev->debugfs_intf;
 761
 762         if (unlikely(!intf))
 763                 return;
 764
 765         skb_queue_purge(&intf->frame_dump_skbqueue);
 766
 767 #ifdef CONFIG_RT2X00_LIB_CRYPTO
 768         debugfs_remove(intf->crypto_stats_entry);
 769 #endif
 770         debugfs_remove(intf->queue_stats_entry);
 771         debugfs_remove(intf->queue_frame_dump_entry);
 772         debugfs_remove(intf->queue_folder);
 773         debugfs_remove(intf->rf_val_entry);
 774         debugfs_remove(intf->rf_off_entry);
 775         debugfs_remove(intf->bbp_val_entry);
 776         debugfs_remove(intf->bbp_off_entry);
 777         debugfs_remove(intf->eeprom_val_entry);
 778         debugfs_remove(intf->eeprom_off_entry);
 779         debugfs_remove(intf->csr_val_entry);
 780         debugfs_remove(intf->csr_off_entry);
 781         debugfs_remove(intf->register_folder);
 782         debugfs_remove(intf->dev_flags);
 783         debugfs_remove(intf->cap_flags);
 784         debugfs_remove(intf->chipset_entry);
 785         debugfs_remove(intf->driver_entry);
 786         debugfs_remove(intf->driver_folder);
 787         kfree(intf->chipset_blob.data);
 788         kfree(intf->driver_blob.data);
 789         kfree(intf);
 790
 791         rt2x00dev->debugfs_intf = NULL;
 792 }