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          *     - rfcsr offset/value files
  74          *   - queue folder
  75          *     - frame dump file
  76          *     - queue stats file
  77          *     - crypto stats file
  78          */
  79         struct dentry *driver_folder;
  80         struct dentry *driver_entry;
  81         struct dentry *chipset_entry;
  82         struct dentry *dev_flags;
  83         struct dentry *cap_flags;
  84         struct dentry *register_folder;
  85         struct dentry *csr_off_entry;
  86         struct dentry *csr_val_entry;
  87         struct dentry *eeprom_off_entry;
  88         struct dentry *eeprom_val_entry;
  89         struct dentry *bbp_off_entry;
  90         struct dentry *bbp_val_entry;
  91         struct dentry *rf_off_entry;
  92         struct dentry *rf_val_entry;
  93         struct dentry *rfcsr_off_entry;
  94         struct dentry *rfcsr_val_entry;
  95         struct dentry *queue_folder;
  96         struct dentry *queue_frame_dump_entry;
  97         struct dentry *queue_stats_entry;
  98         struct dentry *crypto_stats_entry;
  99
 100         /*
 101          * The frame dump file only allows a single reader,
 102          * so we need to store the current state here.
 103          */
 104         unsigned long frame_dump_flags;
 105 #define FRAME_DUMP_FILE_OPEN    1
 106
 107         /*
 108          * We queue each frame before dumping it to the user,
 109          * per read command we will pass a single skb structure
 110          * so we should be prepared to queue multiple sk buffers
 111          * before sending it to userspace.
 112          */
 113         struct sk_buff_head frame_dump_skbqueue;
 114         wait_queue_head_t frame_dump_waitqueue;
 115
 116         /*
 117          * HW crypto statistics.
 118          * All statistics are stored separately per cipher type.
 119          */
 120         struct rt2x00debug_crypto crypto_stats[CIPHER_MAX];
 121
 122         /*
 123          * Driver and chipset files will use a data buffer
 124          * that has been created in advance. This will simplify
 125          * the code since we can use the debugfs functions.
 126          */
 127         struct debugfs_blob_wrapper driver_blob;
 128         struct debugfs_blob_wrapper chipset_blob;
 129
 130         /*
 131          * Requested offset for each register type.
 132          */
 133         unsigned int offset_csr;
 134         unsigned int offset_eeprom;
 135         unsigned int offset_bbp;
 136         unsigned int offset_rf;
 137         unsigned int offset_rfcsr;
 138 };
 139
 140 void rt2x00debug_update_crypto(struct rt2x00_dev *rt2x00dev,
 141                                struct rxdone_entry_desc *rxdesc)
 142 {
 143         struct rt2x00debug_intf *intf = rt2x00dev->debugfs_intf;
 144         enum cipher cipher = rxdesc->cipher;
 145         enum rx_crypto status = rxdesc->cipher_status;
 146
 147         if (cipher == CIPHER_TKIP_NO_MIC)
 148                 cipher = CIPHER_TKIP;
 149         if (cipher == CIPHER_NONE || cipher >= CIPHER_MAX)
 150                 return;
 151
 152         /* Remove CIPHER_NONE index */
 153         cipher--;
 154
 155         intf->crypto_stats[cipher].success += (status == RX_CRYPTO_SUCCESS);
 156         intf->crypto_stats[cipher].icv_error += (status == RX_CRYPTO_FAIL_ICV);
 157         intf->crypto_stats[cipher].mic_error += (status == RX_CRYPTO_FAIL_MIC);
 158         intf->crypto_stats[cipher].key_error += (status == RX_CRYPTO_FAIL_KEY);
 159 }
 160
 161 void rt2x00debug_dump_frame(struct rt2x00_dev *rt2x00dev,
 162                             enum rt2x00_dump_type type, struct sk_buff *skb)
 163 {
 164         struct rt2x00debug_intf *intf = rt2x00dev->debugfs_intf;
 165         struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb);
 166         struct sk_buff *skbcopy;
 167         struct rt2x00dump_hdr *dump_hdr;
 168         struct timeval timestamp;
 169         u32 data_len;
 170
 171         if (likely(!test_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags)))
 172                 return;
 173
 174         do_gettimeofday(&timestamp);
 175
 176         if (skb_queue_len(&intf->frame_dump_skbqueue) > 20) {
 177                 rt2x00_dbg(rt2x00dev, "txrx dump queue length exceeded\n");
 178                 return;
 179         }
 180
 181         data_len = skb->len;
 182         if (skbdesc->flags & SKBDESC_DESC_IN_SKB)
 183                 data_len -= skbdesc->desc_len;
 184
 185         skbcopy = alloc_skb(sizeof(*dump_hdr) + skbdesc->desc_len + data_len,
 186                             GFP_ATOMIC);
 187         if (!skbcopy) {
 188                 rt2x00_dbg(rt2x00dev, "Failed to copy skb for dump\n");
 189                 return;
 190         }
 191
 192         dump_hdr = (struct rt2x00dump_hdr *)skb_put(skbcopy, sizeof(*dump_hdr));
 193         dump_hdr->version = cpu_to_le32(DUMP_HEADER_VERSION);
 194         dump_hdr->header_length = cpu_to_le32(sizeof(*dump_hdr));
 195         dump_hdr->desc_length = cpu_to_le32(skbdesc->desc_len);
 196         dump_hdr->data_length = cpu_to_le32(data_len);
 197         dump_hdr->chip_rt = cpu_to_le16(rt2x00dev->chip.rt);
 198         dump_hdr->chip_rf = cpu_to_le16(rt2x00dev->chip.rf);
 199         dump_hdr->chip_rev = cpu_to_le16(rt2x00dev->chip.rev);
 200         dump_hdr->type = cpu_to_le16(type);
 201         dump_hdr->queue_index = skbdesc->entry->queue->qid;
 202         dump_hdr->entry_index = skbdesc->entry->entry_idx;
 203         dump_hdr->timestamp_sec = cpu_to_le32(timestamp.tv_sec);
 204         dump_hdr->timestamp_usec = cpu_to_le32(timestamp.tv_usec);
 205
 206         if (!(skbdesc->flags & SKBDESC_DESC_IN_SKB))
 207                 memcpy(skb_put(skbcopy, skbdesc->desc_len), skbdesc->desc,
 208                        skbdesc->desc_len);
 209         memcpy(skb_put(skbcopy, skb->len), skb->data, skb->len);
 210
 211         skb_queue_tail(&intf->frame_dump_skbqueue, skbcopy);
 212         wake_up_interruptible(&intf->frame_dump_waitqueue);
 213
 214         /*
 215          * Verify that the file has not been closed while we were working.
 216          */
 217         if (!test_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags))
 218                 skb_queue_purge(&intf->frame_dump_skbqueue);
 219 }
 220 EXPORT_SYMBOL_GPL(rt2x00debug_dump_frame);
 221
 222 static int rt2x00debug_file_open(struct inode *inode, struct file *file)
 223 {
 224         struct rt2x00debug_intf *intf = inode->i_private;
 225
 226         file->private_data = inode->i_private;
 227
 228         if (!try_module_get(intf->debug->owner))
 229                 return -EBUSY;
 230
 231         return 0;
 232 }
 233
 234 static int rt2x00debug_file_release(struct inode *inode, struct file *file)
 235 {
 236         struct rt2x00debug_intf *intf = file->private_data;
 237
 238         module_put(intf->debug->owner);
 239
 240         return 0;
 241 }
 242
 243 static int rt2x00debug_open_queue_dump(struct inode *inode, struct file *file)
 244 {
 245         struct rt2x00debug_intf *intf = inode->i_private;
 246         int retval;
 247
 248         retval = rt2x00debug_file_open(inode, file);
 249         if (retval)
 250                 return retval;
 251
 252         if (test_and_set_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags)) {
 253                 rt2x00debug_file_release(inode, file);
 254                 return -EBUSY;
 255         }
 256
 257         return 0;
 258 }
 259
 260 static int rt2x00debug_release_queue_dump(struct inode *inode, struct file *file)
 261 {
 262         struct rt2x00debug_intf *intf = inode->i_private;
 263
 264         skb_queue_purge(&intf->frame_dump_skbqueue);
 265
 266         clear_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags);
 267
 268         return rt2x00debug_file_release(inode, file);
 269 }
 270
 271 static ssize_t rt2x00debug_read_queue_dump(struct file *file,
 272                                            char __user *buf,
 273                                            size_t length,
 274                                            loff_t *offset)
 275 {
 276         struct rt2x00debug_intf *intf = file->private_data;
 277         struct sk_buff *skb;
 278         size_t status;
 279         int retval;
 280
 281         if (file->f_flags & O_NONBLOCK)
 282                 return -EAGAIN;
 283
 284         retval =
 285             wait_event_interruptible(intf->frame_dump_waitqueue,
 286                                      (skb =
 287                                      skb_dequeue(&intf->frame_dump_skbqueue)));
 288         if (retval)
 289                 return retval;
 290
 291         status = min((size_t)skb->len, length);
 292         if (copy_to_user(buf, skb->data, status)) {
 293                 status = -EFAULT;
 294                 goto exit;
 295         }
 296
 297         *offset += status;
 298
 299 exit:
 300         kfree_skb(skb);
 301
 302         return status;
 303 }
 304
 305 static unsigned int rt2x00debug_poll_queue_dump(struct file *file,
 306                                                 poll_table *wait)
 307 {
 308         struct rt2x00debug_intf *intf = file->private_data;
 309
 310         poll_wait(file, &intf->frame_dump_waitqueue, wait);
 311
 312         if (!skb_queue_empty(&intf->frame_dump_skbqueue))
 313                 return POLLOUT | POLLWRNORM;
 314
 315         return 0;
 316 }
 317
 318 static const struct file_operations rt2x00debug_fop_queue_dump = {
 319         .owner          = THIS_MODULE,
 320         .read           = rt2x00debug_read_queue_dump,
 321         .poll           = rt2x00debug_poll_queue_dump,
 322         .open           = rt2x00debug_open_queue_dump,
 323         .release        = rt2x00debug_release_queue_dump,
 324         .llseek         = default_llseek,
 325 };
 326
 327 static ssize_t rt2x00debug_read_queue_stats(struct file *file,
 328                                             char __user *buf,
 329                                             size_t length,
 330                                             loff_t *offset)
 331 {
 332         struct rt2x00debug_intf *intf = file->private_data;
 333         struct data_queue *queue;
 334         unsigned long irqflags;
 335         unsigned int lines = 1 + intf->rt2x00dev->data_queues;
 336         size_t size;
 337         char *data;
 338         char *temp;
 339
 340         if (*offset)
 341                 return 0;
 342
 343         data = kcalloc(lines, MAX_LINE_LENGTH, GFP_KERNEL);
 344         if (!data)
 345                 return -ENOMEM;
 346
 347         temp = data +
 348             sprintf(data, "qid\tflags\t\tcount\tlimit\tlength\tindex\tdma done\tdone\n");
 349
 350         queue_for_each(intf->rt2x00dev, queue) {
 351                 spin_lock_irqsave(&queue->index_lock, irqflags);
 352
 353                 temp += sprintf(temp, "%d\t0x%.8x\t%d\t%d\t%d\t%d\t%d\t\t%d\n",
 354                                 queue->qid, (unsigned int)queue->flags,
 355                                 queue->count, queue->limit, queue->length,
 356                                 queue->index[Q_INDEX],
 357                                 queue->index[Q_INDEX_DMA_DONE],
 358                                 queue->index[Q_INDEX_DONE]);
 359
 360                 spin_unlock_irqrestore(&queue->index_lock, irqflags);
 361         }
 362
 363         size = strlen(data);
 364         size = min(size, length);
 365
 366         if (copy_to_user(buf, data, size)) {
 367                 kfree(data);
 368                 return -EFAULT;
 369         }
 370
 371         kfree(data);
 372
 373         *offset += size;
 374         return size;
 375 }
 376
 377 static const struct file_operations rt2x00debug_fop_queue_stats = {
 378         .owner          = THIS_MODULE,
 379         .read           = rt2x00debug_read_queue_stats,
 380         .open           = rt2x00debug_file_open,
 381         .release        = rt2x00debug_file_release,
 382         .llseek         = default_llseek,
 383 };
 384
 385 #ifdef CONFIG_RT2X00_LIB_CRYPTO
 386 static ssize_t rt2x00debug_read_crypto_stats(struct file *file,
 387                                              char __user *buf,
 388                                              size_t length,
 389                                              loff_t *offset)
 390 {
 391         struct rt2x00debug_intf *intf = file->private_data;
 392         static const char * const name[] = { "WEP64", "WEP128", "TKIP", "AES" };
 393         char *data;
 394         char *temp;
 395         size_t size;
 396         unsigned int i;
 397
 398         if (*offset)
 399                 return 0;
 400
 401         data = kzalloc((1 + CIPHER_MAX) * MAX_LINE_LENGTH, GFP_KERNEL);
 402         if (!data)
 403                 return -ENOMEM;
 404
 405         temp = data;
 406         temp += sprintf(data, "cipher\tsuccess\ticv err\tmic err\tkey err\n");
 407
 408         for (i = 0; i < CIPHER_MAX; i++) {
 409                 temp += sprintf(temp, "%s\t%lu\t%lu\t%lu\t%lu\n", name[i],
 410                                 intf->crypto_stats[i].success,
 411                                 intf->crypto_stats[i].icv_error,
 412                                 intf->crypto_stats[i].mic_error,
 413                                 intf->crypto_stats[i].key_error);
 414         }
 415
 416         size = strlen(data);
 417         size = min(size, length);
 418
 419         if (copy_to_user(buf, data, size)) {
 420                 kfree(data);
 421                 return -EFAULT;
 422         }
 423
 424         kfree(data);
 425
 426         *offset += size;
 427         return size;
 428 }
 429
 430 static const struct file_operations rt2x00debug_fop_crypto_stats = {
 431         .owner          = THIS_MODULE,
 432         .read           = rt2x00debug_read_crypto_stats,
 433         .open           = rt2x00debug_file_open,
 434         .release        = rt2x00debug_file_release,
 435         .llseek         = default_llseek,
 436 };
 437 #endif
 438
 439 #define RT2X00DEBUGFS_OPS_READ(__name, __format, __type)        \
 440 static ssize_t rt2x00debug_read_##__name(struct file *file,     \
 441                                          char __user *buf,      \
 442                                          size_t length,         \
 443                                          loff_t *offset)        \
 444 {                                                               \
 445         struct rt2x00debug_intf *intf = file->private_data;     \
 446         const struct rt2x00debug *debug = intf->debug;          \
 447         char line[16];                                          \
 448         size_t size;                                            \
 449         unsigned int index = intf->offset_##__name;             \
 450         __type value;                                           \
 451                                                                 \
 452         if (*offset)                                            \
 453                 return 0;                                       \
 454                                                                 \
 455         if (index >= debug->__name.word_count)                  \
 456                 return -EINVAL;                                 \
 457                                                                 \
 458         index += (debug->__name.word_base /                     \
 459                   debug->__name.word_size);                     \
 460                                                                 \
 461         if (debug->__name.flags & RT2X00DEBUGFS_OFFSET)         \
 462                 index *= debug->__name.word_size;               \
 463                                                                 \
 464         debug->__name.read(intf->rt2x00dev, index, &value);     \
 465                                                                 \
 466         size = sprintf(line, __format, value);                  \
 467                                                                 \
 468         if (copy_to_user(buf, line, size))                      \
 469                 return -EFAULT;                                 \
 470                                                                 \
 471         *offset += size;                                        \
 472         return size;                                            \
 473 }
 474
 475 #define RT2X00DEBUGFS_OPS_WRITE(__name, __type)                 \
 476 static ssize_t rt2x00debug_write_##__name(struct file *file,    \
 477                                           const char __user *buf,\
 478                                           size_t length,        \
 479                                           loff_t *offset)       \
 480 {                                                               \
 481         struct rt2x00debug_intf *intf = file->private_data;     \
 482         const struct rt2x00debug *debug = intf->debug;          \
 483         char line[16];                                          \
 484         size_t size;                                            \
 485         unsigned int index = intf->offset_##__name;             \
 486         __type value;                                           \
 487                                                                 \
 488         if (*offset)                                            \
 489                 return 0;                                       \
 490                                                                 \
 491         if (index >= debug->__name.word_count)                  \
 492                 return -EINVAL;                                 \
 493                                                                 \
 494         if (length > sizeof(line))                              \
 495                 return -EINVAL;                                 \
 496                                                                 \
 497         if (copy_from_user(line, buf, length))                  \
 498                 return -EFAULT;                                 \
 499                                                                 \
 500         size = strlen(line);                                    \
 501         value = simple_strtoul(line, NULL, 0);                  \
 502                                                                 \
 503         index += (debug->__name.word_base /                     \
 504                   debug->__name.word_size);                     \
 505                                                                 \
 506         if (debug->__name.flags & RT2X00DEBUGFS_OFFSET)         \
 507                 index *= debug->__name.word_size;               \
 508                                                                 \
 509         debug->__name.write(intf->rt2x00dev, index, value);     \
 510                                                                 \
 511         *offset += size;                                        \
 512         return size;                                            \
 513 }
 514
 515 #define RT2X00DEBUGFS_OPS(__name, __format, __type)             \
 516 RT2X00DEBUGFS_OPS_READ(__name, __format, __type);               \
 517 RT2X00DEBUGFS_OPS_WRITE(__name, __type);                        \
 518                                                                 \
 519 static const struct file_operations rt2x00debug_fop_##__name = {\
 520         .owner          = THIS_MODULE,                          \
 521         .read           = rt2x00debug_read_##__name,            \
 522         .write          = rt2x00debug_write_##__name,           \
 523         .open           = rt2x00debug_file_open,                \
 524         .release        = rt2x00debug_file_release,             \
 525         .llseek         = generic_file_llseek,                  \
 526 };
 527
 528 RT2X00DEBUGFS_OPS(csr, "0x%.8x\n", u32);
 529 RT2X00DEBUGFS_OPS(eeprom, "0x%.4x\n", u16);
 530 RT2X00DEBUGFS_OPS(bbp, "0x%.2x\n", u8);
 531 RT2X00DEBUGFS_OPS(rf, "0x%.8x\n", u32);
 532 RT2X00DEBUGFS_OPS(rfcsr, "0x%.2x\n", u8);
 533
 534 static ssize_t rt2x00debug_read_dev_flags(struct file *file,
 535                                           char __user *buf,
 536                                           size_t length,
 537                                           loff_t *offset)
 538 {
 539         struct rt2x00debug_intf *intf = file->private_data;
 540         char line[16];
 541         size_t size;
 542
 543         if (*offset)
 544                 return 0;
 545
 546         size = sprintf(line, "0x%.8x\n", (unsigned int)intf->rt2x00dev->flags);
 547
 548         if (copy_to_user(buf, line, size))
 549                 return -EFAULT;
 550
 551         *offset += size;
 552         return size;
 553 }
 554
 555 static const struct file_operations rt2x00debug_fop_dev_flags = {
 556         .owner          = THIS_MODULE,
 557         .read           = rt2x00debug_read_dev_flags,
 558         .open           = rt2x00debug_file_open,
 559         .release        = rt2x00debug_file_release,
 560         .llseek         = default_llseek,
 561 };
 562
 563 static ssize_t rt2x00debug_read_cap_flags(struct file *file,
 564                                           char __user *buf,
 565                                           size_t length,
 566                                           loff_t *offset)
 567 {
 568         struct rt2x00debug_intf *intf = file->private_data;
 569         char line[16];
 570         size_t size;
 571
 572         if (*offset)
 573                 return 0;
 574
 575         size = sprintf(line, "0x%.8x\n", (unsigned int)intf->rt2x00dev->cap_flags);
 576
 577         if (copy_to_user(buf, line, size))
 578                 return -EFAULT;
 579
 580         *offset += size;
 581         return size;
 582 }
 583
 584 static const struct file_operations rt2x00debug_fop_cap_flags = {
 585         .owner          = THIS_MODULE,
 586         .read           = rt2x00debug_read_cap_flags,
 587         .open           = rt2x00debug_file_open,
 588         .release        = rt2x00debug_file_release,
 589         .llseek         = default_llseek,
 590 };
 591
 592 static struct dentry *rt2x00debug_create_file_driver(const char *name,
 593                                                      struct rt2x00debug_intf
 594                                                      *intf,
 595                                                      struct debugfs_blob_wrapper
 596                                                      *blob)
 597 {
 598         char *data;
 599
 600         data = kzalloc(3 * MAX_LINE_LENGTH, GFP_KERNEL);
 601         if (!data)
 602                 return NULL;
 603
 604         blob->data = data;
 605         data += sprintf(data, "driver:\t%s\n", intf->rt2x00dev->ops->name);
 606         data += sprintf(data, "version:\t%s\n", DRV_VERSION);
 607         blob->size = strlen(blob->data);
 608
 609         return debugfs_create_blob(name, S_IRUSR, intf->driver_folder, blob);
 610 }
 611
 612 static struct dentry *rt2x00debug_create_file_chipset(const char *name,
 613                                                       struct rt2x00debug_intf
 614                                                       *intf,
 615                                                       struct
 616                                                       debugfs_blob_wrapper
 617                                                       *blob)
 618 {
 619         const struct rt2x00debug *debug = intf->debug;
 620         char *data;
 621
 622         data = kzalloc(9 * MAX_LINE_LENGTH, GFP_KERNEL);
 623         if (!data)
 624                 return NULL;
 625
 626         blob->data = data;
 627         data += sprintf(data, "rt chip:\t%04x\n", intf->rt2x00dev->chip.rt);
 628         data += sprintf(data, "rf chip:\t%04x\n", intf->rt2x00dev->chip.rf);
 629         data += sprintf(data, "revision:\t%04x\n", intf->rt2x00dev->chip.rev);
 630         data += sprintf(data, "\n");
 631         data += sprintf(data, "register\tbase\twords\twordsize\n");
 632 #define RT2X00DEBUGFS_SPRINTF_REGISTER(__name)                  \
 633 {                                                               \
 634         if(debug->__name.read)                                  \
 635                 data += sprintf(data, __stringify(__name)       \
 636                                 "\t%d\t%d\t%d\n",               \
 637                                 debug->__name.word_base,        \
 638                                 debug->__name.word_count,       \
 639                                 debug->__name.word_size);       \
 640 }
 641         RT2X00DEBUGFS_SPRINTF_REGISTER(csr);
 642         RT2X00DEBUGFS_SPRINTF_REGISTER(eeprom);
 643         RT2X00DEBUGFS_SPRINTF_REGISTER(bbp);
 644         RT2X00DEBUGFS_SPRINTF_REGISTER(rf);
 645         RT2X00DEBUGFS_SPRINTF_REGISTER(rfcsr);
 646 #undef RT2X00DEBUGFS_SPRINTF_REGISTER
 647
 648         blob->size = strlen(blob->data);
 649
 650         return debugfs_create_blob(name, S_IRUSR, intf->driver_folder, blob);
 651 }
 652
 653 void rt2x00debug_register(struct rt2x00_dev *rt2x00dev)
 654 {
 655         const struct rt2x00debug *debug = rt2x00dev->ops->debugfs;
 656         struct rt2x00debug_intf *intf;
 657
 658         intf = kzalloc(sizeof(struct rt2x00debug_intf), GFP_KERNEL);
 659         if (!intf) {
 660                 rt2x00_err(rt2x00dev, "Failed to allocate debug handler\n");
 661                 return;
 662         }
 663
 664         intf->debug = debug;
 665         intf->rt2x00dev = rt2x00dev;
 666         rt2x00dev->debugfs_intf = intf;
 667
 668         intf->driver_folder =
 669             debugfs_create_dir(intf->rt2x00dev->ops->name,
 670                                rt2x00dev->hw->wiphy->debugfsdir);
 671         if (IS_ERR(intf->driver_folder) || !intf->driver_folder)
 672                 goto exit;
 673
 674         intf->driver_entry =
 675             rt2x00debug_create_file_driver("driver", intf, &intf->driver_blob);
 676         if (IS_ERR(intf->driver_entry) || !intf->driver_entry)
 677                 goto exit;
 678
 679         intf->chipset_entry =
 680             rt2x00debug_create_file_chipset("chipset",
 681                                             intf, &intf->chipset_blob);
 682         if (IS_ERR(intf->chipset_entry) || !intf->chipset_entry)
 683                 goto exit;
 684
 685         intf->dev_flags = debugfs_create_file("dev_flags", S_IRUSR,
 686                                               intf->driver_folder, intf,
 687                                               &rt2x00debug_fop_dev_flags);
 688         if (IS_ERR(intf->dev_flags) || !intf->dev_flags)
 689                 goto exit;
 690
 691         intf->cap_flags = debugfs_create_file("cap_flags", S_IRUSR,
 692                                               intf->driver_folder, intf,
 693                                               &rt2x00debug_fop_cap_flags);
 694         if (IS_ERR(intf->cap_flags) || !intf->cap_flags)
 695                 goto exit;
 696
 697         intf->register_folder =
 698             debugfs_create_dir("register", intf->driver_folder);
 699         if (IS_ERR(intf->register_folder) || !intf->register_folder)
 700                 goto exit;
 701
 702 #define RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(__intf, __name)                     \
 703 ({                                                                              \
 704         if(debug->__name.read) {                                                \
 705                 (__intf)->__name##_off_entry =                                  \
 706                 debugfs_create_u32(__stringify(__name) "_offset",               \
 707                                        S_IRUSR | S_IWUSR,                       \
 708                                        (__intf)->register_folder,               \
 709                                        &(__intf)->offset_##__name);             \
 710                 if (IS_ERR((__intf)->__name##_off_entry)                        \
 711                                 || !(__intf)->__name##_off_entry)               \
 712                         goto exit;                                              \
 713                                                                                 \
 714                 (__intf)->__name##_val_entry =                                  \
 715                 debugfs_create_file(__stringify(__name) "_value",               \
 716                                         S_IRUSR | S_IWUSR,                      \
 717                                         (__intf)->register_folder,              \
 718                                         (__intf), &rt2x00debug_fop_##__name);   \
 719                 if (IS_ERR((__intf)->__name##_val_entry)                        \
 720                                 || !(__intf)->__name##_val_entry)               \
 721                         goto exit;                                              \
 722         }                                                                       \
 723 })
 724
 725         RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, csr);
 726         RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, eeprom);
 727         RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, bbp);
 728         RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, rf);
 729         RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, rfcsr);
 730
 731 #undef RT2X00DEBUGFS_CREATE_REGISTER_ENTRY
 732
 733         intf->queue_folder =
 734             debugfs_create_dir("queue", intf->driver_folder);
 735         if (IS_ERR(intf->queue_folder) || !intf->queue_folder)
 736                 goto exit;
 737
 738         intf->queue_frame_dump_entry =
 739             debugfs_create_file("dump", S_IRUSR, intf->queue_folder,
 740                                 intf, &rt2x00debug_fop_queue_dump);
 741         if (IS_ERR(intf->queue_frame_dump_entry)
 742                 || !intf->queue_frame_dump_entry)
 743                 goto exit;
 744
 745         skb_queue_head_init(&intf->frame_dump_skbqueue);
 746         init_waitqueue_head(&intf->frame_dump_waitqueue);
 747
 748         intf->queue_stats_entry =
 749             debugfs_create_file("queue", S_IRUSR, intf->queue_folder,
 750                                 intf, &rt2x00debug_fop_queue_stats);
 751
 752 #ifdef CONFIG_RT2X00_LIB_CRYPTO
 753         if (test_bit(CAPABILITY_HW_CRYPTO, &rt2x00dev->cap_flags))
 754                 intf->crypto_stats_entry =
 755                     debugfs_create_file("crypto", S_IRUGO, intf->queue_folder,
 756                                         intf, &rt2x00debug_fop_crypto_stats);
 757 #endif
 758
 759         return;
 760
 761 exit:
 762         rt2x00debug_deregister(rt2x00dev);
 763         rt2x00_err(rt2x00dev, "Failed to register debug handler\n");
 764 }
 765
 766 void rt2x00debug_deregister(struct rt2x00_dev *rt2x00dev)
 767 {
 768         struct rt2x00debug_intf *intf = rt2x00dev->debugfs_intf;
 769
 770         if (unlikely(!intf))
 771                 return;
 772
 773         skb_queue_purge(&intf->frame_dump_skbqueue);
 774
 775 #ifdef CONFIG_RT2X00_LIB_CRYPTO
 776         debugfs_remove(intf->crypto_stats_entry);
 777 #endif
 778         debugfs_remove(intf->queue_stats_entry);
 779         debugfs_remove(intf->queue_frame_dump_entry);
 780         debugfs_remove(intf->queue_folder);
 781         debugfs_remove(intf->rfcsr_val_entry);
 782         debugfs_remove(intf->rfcsr_off_entry);
 783         debugfs_remove(intf->rf_val_entry);
 784         debugfs_remove(intf->rf_off_entry);
 785         debugfs_remove(intf->bbp_val_entry);
 786         debugfs_remove(intf->bbp_off_entry);
 787         debugfs_remove(intf->eeprom_val_entry);
 788         debugfs_remove(intf->eeprom_off_entry);
 789         debugfs_remove(intf->csr_val_entry);
 790         debugfs_remove(intf->csr_off_entry);
 791         debugfs_remove(intf->register_folder);
 792         debugfs_remove(intf->dev_flags);
 793         debugfs_remove(intf->cap_flags);
 794         debugfs_remove(intf->chipset_entry);
 795         debugfs_remove(intf->driver_entry);
 796         debugfs_remove(intf->driver_folder);
 797         kfree(intf->chipset_blob.data);
 798         kfree(intf->driver_blob.data);
 799         kfree(intf);
 800
 801         rt2x00dev->debugfs_intf = NULL;
 802 }