drivers/net/wireless/ralink/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, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 /*
  20         Module: rt2x00lib
  21         Abstract: rt2x00 debugfs specific routines.
  22  */
  23
  24 #include <linux/debugfs.h>
  25 #include <linux/kernel.h>
  26 #include <linux/module.h>
  27 #include <linux/poll.h>
  28 #include <linux/sched.h>
  29 #include <linux/slab.h>
  30 #include <linux/uaccess.h>
  31
  32 #include "rt2x00.h"
  33 #include "rt2x00lib.h"
  34 #include "rt2x00dump.h"
  35
  36 #define MAX_LINE_LENGTH 64
  37
  38 struct rt2x00debug_crypto {
  39         unsigned long success;
  40         unsigned long icv_error;
  41         unsigned long mic_error;
  42         unsigned long key_error;
  43 };
  44
  45 struct rt2x00debug_intf {
  46         /*
  47          * Pointer to driver structure where
  48          * this debugfs entry belongs to.
  49          */
  50         struct rt2x00_dev *rt2x00dev;
  51
  52         /*
  53          * Reference to the rt2x00debug structure
  54          * which can be used to communicate with
  55          * the registers.
  56          */
  57         const struct rt2x00debug *debug;
  58
  59         /*
  60          * Debugfs entries for:
  61          * - driver folder
  62          *   - driver file
  63          *   - chipset file
  64          *   - device state flags file
  65          *   - device capability flags file
  66          *   - register folder
  67          *     - csr offset/value files
  68          *     - eeprom offset/value files
  69          *     - bbp offset/value files
  70          *     - rf offset/value files
  71          *     - rfcsr 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 *cap_flags;
  82         struct dentry *register_folder;
  83         struct dentry *csr_off_entry;
  84         struct dentry *csr_val_entry;
  85         struct dentry *eeprom_off_entry;
  86         struct dentry *eeprom_val_entry;
  87         struct dentry *bbp_off_entry;
  88         struct dentry *bbp_val_entry;
  89         struct dentry *rf_off_entry;
  90         struct dentry *rf_val_entry;
  91         struct dentry *rfcsr_off_entry;
  92         struct dentry *rfcsr_val_entry;
  93         struct dentry *queue_folder;
  94         struct dentry *queue_frame_dump_entry;
  95         struct dentry *queue_stats_entry;
  96         struct dentry *crypto_stats_entry;
  97
  98         /*
  99          * The frame dump file only allows a single reader,
 100          * so we need to store the current state here.
 101          */
 102         unsigned long frame_dump_flags;
 103 #define FRAME_DUMP_FILE_OPEN    1
 104
 105         /*
 106          * We queue each frame before dumping it to the user,
 107          * per read command we will pass a single skb structure
 108          * so we should be prepared to queue multiple sk buffers
 109          * before sending it to userspace.
 110          */
 111         struct sk_buff_head frame_dump_skbqueue;
 112         wait_queue_head_t frame_dump_waitqueue;
 113
 114         /*
 115          * HW crypto statistics.
 116          * All statistics are stored separately per cipher type.
 117          */
 118         struct rt2x00debug_crypto crypto_stats[CIPHER_MAX];
 119
 120         /*
 121          * Driver and chipset files will use a data buffer
 122          * that has been created in advance. This will simplify
 123          * the code since we can use the debugfs functions.
 124          */
 125         struct debugfs_blob_wrapper driver_blob;
 126         struct debugfs_blob_wrapper chipset_blob;
 127
 128         /*
 129          * Requested offset for each register type.
 130          */
 131         unsigned int offset_csr;
 132         unsigned int offset_eeprom;
 133         unsigned int offset_bbp;
 134         unsigned int offset_rf;
 135         unsigned int offset_rfcsr;
 136 };
 137
 138 void rt2x00debug_update_crypto(struct rt2x00_dev *rt2x00dev,
 139                                struct rxdone_entry_desc *rxdesc)
 140 {
 141         struct rt2x00debug_intf *intf = rt2x00dev->debugfs_intf;
 142         enum cipher cipher = rxdesc->cipher;
 143         enum rx_crypto status = rxdesc->cipher_status;
 144
 145         if (cipher == CIPHER_TKIP_NO_MIC)
 146                 cipher = CIPHER_TKIP;
 147         if (cipher == CIPHER_NONE || cipher >= CIPHER_MAX)
 148                 return;
 149
 150         /* Remove CIPHER_NONE index */
 151         cipher--;
 152
 153         intf->crypto_stats[cipher].success += (status == RX_CRYPTO_SUCCESS);
 154         intf->crypto_stats[cipher].icv_error += (status == RX_CRYPTO_FAIL_ICV);
 155         intf->crypto_stats[cipher].mic_error += (status == RX_CRYPTO_FAIL_MIC);
 156         intf->crypto_stats[cipher].key_error += (status == RX_CRYPTO_FAIL_KEY);
 157 }
 158
 159 void rt2x00debug_dump_frame(struct rt2x00_dev *rt2x00dev,
 160                             enum rt2x00_dump_type type, struct queue_entry *entry)
 161 {
 162         struct rt2x00debug_intf *intf = rt2x00dev->debugfs_intf;
 163         struct sk_buff *skb = entry->skb;
 164         struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb);
 165         struct sk_buff *skbcopy;
 166         struct rt2x00dump_hdr *dump_hdr;
 167         struct timespec64 timestamp;
 168         u32 data_len;
 169
 170         if (likely(!test_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags)))
 171                 return;
 172
 173         ktime_get_ts64(&timestamp);
 174
 175         if (skb_queue_len(&intf->frame_dump_skbqueue) > 20) {
 176                 rt2x00_dbg(rt2x00dev, "txrx dump queue length exceeded\n");
 177                 return;
 178         }
 179
 180         data_len = skb->len;
 181         if (skbdesc->flags & SKBDESC_DESC_IN_SKB)
 182                 data_len -= skbdesc->desc_len;
 183
 184         skbcopy = alloc_skb(sizeof(*dump_hdr) + skbdesc->desc_len + data_len,
 185                             GFP_ATOMIC);
 186         if (!skbcopy) {
 187                 rt2x00_dbg(rt2x00dev, "Failed to copy skb for dump\n");
 188                 return;
 189         }
 190
 191         dump_hdr = skb_put(skbcopy, sizeof(*dump_hdr));
 192         dump_hdr->version = cpu_to_le32(DUMP_HEADER_VERSION);
 193         dump_hdr->header_length = cpu_to_le32(sizeof(*dump_hdr));
 194         dump_hdr->desc_length = cpu_to_le32(skbdesc->desc_len);
 195         dump_hdr->data_length = cpu_to_le32(data_len);
 196         dump_hdr->chip_rt = cpu_to_le16(rt2x00dev->chip.rt);
 197         dump_hdr->chip_rf = cpu_to_le16(rt2x00dev->chip.rf);
 198         dump_hdr->chip_rev = cpu_to_le16(rt2x00dev->chip.rev);
 199         dump_hdr->type = cpu_to_le16(type);
 200         dump_hdr->queue_index = entry->queue->qid;
 201         dump_hdr->entry_index = entry->entry_idx;
 202         dump_hdr->timestamp_sec = cpu_to_le32(timestamp.tv_sec);
 203         dump_hdr->timestamp_usec = cpu_to_le32(timestamp.tv_nsec /
 204                                                NSEC_PER_USEC);
 205
 206         if (!(skbdesc->flags & SKBDESC_DESC_IN_SKB))
 207                 skb_put_data(skbcopy, skbdesc->desc, skbdesc->desc_len);
 208         skb_put_data(skbcopy, skb->data, skb->len);
 209
 210         skb_queue_tail(&intf->frame_dump_skbqueue, skbcopy);
 211         wake_up_interruptible(&intf->frame_dump_waitqueue);
 212
 213         /*
 214          * Verify that the file has not been closed while we were working.
 215          */
 216         if (!test_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags))
 217                 skb_queue_purge(&intf->frame_dump_skbqueue);
 218 }
 219 EXPORT_SYMBOL_GPL(rt2x00debug_dump_frame);
 220
 221 static int rt2x00debug_file_open(struct inode *inode, struct file *file)
 222 {
 223         struct rt2x00debug_intf *intf = inode->i_private;
 224
 225         file->private_data = inode->i_private;
 226
 227         if (!try_module_get(intf->debug->owner))
 228                 return -EBUSY;
 229
 230         return 0;
 231 }
 232
 233 static int rt2x00debug_file_release(struct inode *inode, struct file *file)
 234 {
 235         struct rt2x00debug_intf *intf = file->private_data;
 236
 237         module_put(intf->debug->owner);
 238
 239         return 0;
 240 }
 241
 242 static int rt2x00debug_open_queue_dump(struct inode *inode, struct file *file)
 243 {
 244         struct rt2x00debug_intf *intf = inode->i_private;
 245         int retval;
 246
 247         retval = rt2x00debug_file_open(inode, file);
 248         if (retval)
 249                 return retval;
 250
 251         if (test_and_set_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags)) {
 252                 rt2x00debug_file_release(inode, file);
 253                 return -EBUSY;
 254         }
 255
 256         return 0;
 257 }
 258
 259 static int rt2x00debug_release_queue_dump(struct inode *inode, struct file *file)
 260 {
 261         struct rt2x00debug_intf *intf = inode->i_private;
 262
 263         skb_queue_purge(&intf->frame_dump_skbqueue);
 264
 265         clear_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags);
 266
 267         return rt2x00debug_file_release(inode, file);
 268 }
 269
 270 static ssize_t rt2x00debug_read_queue_dump(struct file *file,
 271                                            char __user *buf,
 272                                            size_t length,
 273                                            loff_t *offset)
 274 {
 275         struct rt2x00debug_intf *intf = file->private_data;
 276         struct sk_buff *skb;
 277         size_t status;
 278         int retval;
 279
 280         if (file->f_flags & O_NONBLOCK)
 281                 return -EAGAIN;
 282
 283         retval =
 284             wait_event_interruptible(intf->frame_dump_waitqueue,
 285                                      (skb =
 286                                      skb_dequeue(&intf->frame_dump_skbqueue)));
 287         if (retval)
 288                 return retval;
 289
 290         status = min_t(size_t, skb->len, length);
 291         if (copy_to_user(buf, skb->data, status)) {
 292                 status = -EFAULT;
 293                 goto exit;
 294         }
 295
 296         *offset += status;
 297
 298 exit:
 299         kfree_skb(skb);
 300
 301         return status;
 302 }
 303
 304 static __poll_t rt2x00debug_poll_queue_dump(struct file *file,
 305                                                 poll_table *wait)
 306 {
 307         struct rt2x00debug_intf *intf = file->private_data;
 308
 309         poll_wait(file, &intf->frame_dump_waitqueue, wait);
 310
 311         if (!skb_queue_empty(&intf->frame_dump_skbqueue))
 312                 return EPOLLOUT | EPOLLWRNORM;
 313
 314         return 0;
 315 }
 316
 317 static const struct file_operations rt2x00debug_fop_queue_dump = {
 318         .owner          = THIS_MODULE,
 319         .read           = rt2x00debug_read_queue_dump,
 320         .poll           = rt2x00debug_poll_queue_dump,
 321         .open           = rt2x00debug_open_queue_dump,
 322         .release        = rt2x00debug_release_queue_dump,
 323         .llseek         = default_llseek,
 324 };
 325
 326 static ssize_t rt2x00debug_read_queue_stats(struct file *file,
 327                                             char __user *buf,
 328                                             size_t length,
 329                                             loff_t *offset)
 330 {
 331         struct rt2x00debug_intf *intf = file->private_data;
 332         struct data_queue *queue;
 333         unsigned long irqflags;
 334         unsigned int lines = 1 + intf->rt2x00dev->data_queues;
 335         size_t size;
 336         char *data;
 337         char *temp;
 338
 339         if (*offset)
 340                 return 0;
 341
 342         data = kcalloc(lines, MAX_LINE_LENGTH, GFP_KERNEL);
 343         if (!data)
 344                 return -ENOMEM;
 345
 346         temp = data +
 347             sprintf(data, "qid\tflags\t\tcount\tlimit\tlength\tindex\tdma done\tdone\n");
 348
 349         queue_for_each(intf->rt2x00dev, queue) {
 350                 spin_lock_irqsave(&queue->index_lock, irqflags);
 351
 352                 temp += sprintf(temp, "%d\t0x%.8x\t%d\t%d\t%d\t%d\t%d\t\t%d\n",
 353                                 queue->qid, (unsigned int)queue->flags,
 354                                 queue->count, queue->limit, queue->length,
 355                                 queue->index[Q_INDEX],
 356                                 queue->index[Q_INDEX_DMA_DONE],
 357                                 queue->index[Q_INDEX_DONE]);
 358
 359                 spin_unlock_irqrestore(&queue->index_lock, irqflags);
 360         }
 361
 362         size = strlen(data);
 363         size = min(size, length);
 364
 365         if (copy_to_user(buf, data, size)) {
 366                 kfree(data);
 367                 return -EFAULT;
 368         }
 369
 370         kfree(data);
 371
 372         *offset += size;
 373         return size;
 374 }
 375
 376 static const struct file_operations rt2x00debug_fop_queue_stats = {
 377         .owner          = THIS_MODULE,
 378         .read           = rt2x00debug_read_queue_stats,
 379         .open           = rt2x00debug_file_open,
 380         .release        = rt2x00debug_file_release,
 381         .llseek         = default_llseek,
 382 };
 383
 384 #ifdef CONFIG_RT2X00_LIB_CRYPTO
 385 static ssize_t rt2x00debug_read_crypto_stats(struct file *file,
 386                                              char __user *buf,
 387                                              size_t length,
 388                                              loff_t *offset)
 389 {
 390         struct rt2x00debug_intf *intf = file->private_data;
 391         static const char * const name[] = { "WEP64", "WEP128", "TKIP", "AES" };
 392         char *data;
 393         char *temp;
 394         size_t size;
 395         unsigned int i;
 396
 397         if (*offset)
 398                 return 0;
 399
 400         data = kcalloc(1 + CIPHER_MAX, MAX_LINE_LENGTH, GFP_KERNEL);
 401         if (!data)
 402                 return -ENOMEM;
 403
 404         temp = data;
 405         temp += sprintf(data, "cipher\tsuccess\ticv err\tmic err\tkey err\n");
 406
 407         for (i = 0; i < CIPHER_MAX; i++) {
 408                 temp += sprintf(temp, "%s\t%lu\t%lu\t%lu\t%lu\n", name[i],
 409                                 intf->crypto_stats[i].success,
 410                                 intf->crypto_stats[i].icv_error,
 411                                 intf->crypto_stats[i].mic_error,
 412                                 intf->crypto_stats[i].key_error);
 413         }
 414
 415         size = strlen(data);
 416         size = min(size, length);
 417
 418         if (copy_to_user(buf, data, size)) {
 419                 kfree(data);
 420                 return -EFAULT;
 421         }
 422
 423         kfree(data);
 424
 425         *offset += size;
 426         return size;
 427 }
 428
 429 static const struct file_operations rt2x00debug_fop_crypto_stats = {
 430         .owner          = THIS_MODULE,
 431         .read           = rt2x00debug_read_crypto_stats,
 432         .open           = rt2x00debug_file_open,
 433         .release        = rt2x00debug_file_release,
 434         .llseek         = default_llseek,
 435 };
 436 #endif
 437
 438 #define RT2X00DEBUGFS_OPS_READ(__name, __format, __type)        \
 439 static ssize_t rt2x00debug_read_##__name(struct file *file,     \
 440                                          char __user *buf,      \
 441                                          size_t length,         \
 442                                          loff_t *offset)        \
 443 {                                                               \
 444         struct rt2x00debug_intf *intf = file->private_data;     \
 445         const struct rt2x00debug *debug = intf->debug;          \
 446         char line[16];                                          \
 447         size_t size;                                            \
 448         unsigned int index = intf->offset_##__name;             \
 449         __type value;                                           \
 450                                                                 \
 451         if (*offset)                                            \
 452                 return 0;                                       \
 453                                                                 \
 454         if (index >= debug->__name.word_count)                  \
 455                 return -EINVAL;                                 \
 456                                                                 \
 457         index += (debug->__name.word_base /                     \
 458                   debug->__name.word_size);                     \
 459                                                                 \
 460         if (debug->__name.flags & RT2X00DEBUGFS_OFFSET)         \
 461                 index *= debug->__name.word_size;               \
 462                                                                 \
 463         value = debug->__name.read(intf->rt2x00dev, index);     \
 464                                                                 \
 465         size = sprintf(line, __format, value);                  \
 466                                                                 \
 467         if (copy_to_user(buf, line, size))                      \
 468                 return -EFAULT;                                 \
 469                                                                 \
 470         *offset += size;                                        \
 471         return size;                                            \
 472 }
 473
 474 #define RT2X00DEBUGFS_OPS_WRITE(__name, __type)                 \
 475 static ssize_t rt2x00debug_write_##__name(struct file *file,    \
 476                                           const char __user *buf,\
 477                                           size_t length,        \
 478                                           loff_t *offset)       \
 479 {                                                               \
 480         struct rt2x00debug_intf *intf = file->private_data;     \
 481         const struct rt2x00debug *debug = intf->debug;          \
 482         char line[17];                                          \
 483         size_t size;                                            \
 484         unsigned int index = intf->offset_##__name;             \
 485         __type value;                                           \
 486                                                                 \
 487         if (*offset)                                            \
 488                 return 0;                                       \
 489                                                                 \
 490         if (index >= debug->__name.word_count)                  \
 491                 return -EINVAL;                                 \
 492                                                                 \
 493         if (length > sizeof(line))                              \
 494                 return -EINVAL;                                 \
 495                                                                 \
 496         if (copy_from_user(line, buf, length))                  \
 497                 return -EFAULT;                                 \
 498         line[16] = 0;                                           \
 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, 0400, 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, 0400, 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", 0400,
 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", 0400,
 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                                            0600,                        \
 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                                             0600,                       \
 717                                             (__intf)->register_folder,  \
 718                                             (__intf),                   \
 719                                             &rt2x00debug_fop_##__name); \
 720                 if (IS_ERR((__intf)->__name##_val_entry) ||             \
 721                     !(__intf)->__name##_val_entry)                      \
 722                         goto exit;                                      \
 723         }                                                               \
 724 })
 725
 726         RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, csr);
 727         RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, eeprom);
 728         RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, bbp);
 729         RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, rf);
 730         RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, rfcsr);
 731
 732 #undef RT2X00DEBUGFS_CREATE_REGISTER_ENTRY
 733
 734         intf->queue_folder =
 735             debugfs_create_dir("queue", intf->driver_folder);
 736         if (IS_ERR(intf->queue_folder) || !intf->queue_folder)
 737                 goto exit;
 738
 739         intf->queue_frame_dump_entry =
 740                 debugfs_create_file("dump", 0400, intf->queue_folder,
 741                                     intf, &rt2x00debug_fop_queue_dump);
 742         if (IS_ERR(intf->queue_frame_dump_entry)
 743                 || !intf->queue_frame_dump_entry)
 744                 goto exit;
 745
 746         skb_queue_head_init(&intf->frame_dump_skbqueue);
 747         init_waitqueue_head(&intf->frame_dump_waitqueue);
 748
 749         intf->queue_stats_entry =
 750                 debugfs_create_file("queue", 0400, intf->queue_folder,
 751                                     intf, &rt2x00debug_fop_queue_stats);
 752
 753 #ifdef CONFIG_RT2X00_LIB_CRYPTO
 754         if (rt2x00_has_cap_hw_crypto(rt2x00dev))
 755                 intf->crypto_stats_entry =
 756                         debugfs_create_file("crypto", 0444, intf->queue_folder,
 757                                             intf,
 758                                             &rt2x00debug_fop_crypto_stats);
 759 #endif
 760
 761         return;
 762
 763 exit:
 764         rt2x00debug_deregister(rt2x00dev);
 765         rt2x00_err(rt2x00dev, "Failed to register debug handler\n");
 766 }
 767
 768 void rt2x00debug_deregister(struct rt2x00_dev *rt2x00dev)
 769 {
 770         struct rt2x00debug_intf *intf = rt2x00dev->debugfs_intf;
 771
 772         if (unlikely(!intf))
 773                 return;
 774
 775         skb_queue_purge(&intf->frame_dump_skbqueue);
 776
 777 #ifdef CONFIG_RT2X00_LIB_CRYPTO
 778         debugfs_remove(intf->crypto_stats_entry);
 779 #endif
 780         debugfs_remove(intf->queue_stats_entry);
 781         debugfs_remove(intf->queue_frame_dump_entry);
 782         debugfs_remove(intf->queue_folder);
 783         debugfs_remove(intf->rfcsr_val_entry);
 784         debugfs_remove(intf->rfcsr_off_entry);
 785         debugfs_remove(intf->rf_val_entry);
 786         debugfs_remove(intf->rf_off_entry);
 787         debugfs_remove(intf->bbp_val_entry);
 788         debugfs_remove(intf->bbp_off_entry);
 789         debugfs_remove(intf->eeprom_val_entry);
 790         debugfs_remove(intf->eeprom_off_entry);
 791         debugfs_remove(intf->csr_val_entry);
 792         debugfs_remove(intf->csr_off_entry);
 793         debugfs_remove(intf->register_folder);
 794         debugfs_remove(intf->dev_flags);
 795         debugfs_remove(intf->cap_flags);
 796         debugfs_remove(intf->chipset_entry);
 797         debugfs_remove(intf->driver_entry);
 798         debugfs_remove(intf->driver_folder);
 799         kfree(intf->chipset_blob.data);
 800         kfree(intf->driver_blob.data);
 801         kfree(intf);
 802
 803         rt2x00dev->debugfs_intf = NULL;
 804 }