66166ef037f59c123d6f1acd594ed010d4bf3ad8
[linux-2.6.git] / drivers / net / wireless / rt2x00 / rt2x00debug.c
1 /*
2         Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
3         <http://rt2x00.serialmonkey.com>
4
5         This program is free software; you can redistribute it and/or modify
6         it under the terms of the GNU General Public License as published by
7         the Free Software Foundation; either version 2 of the License, or
8         (at your option) any later version.
9
10         This program is distributed in the hope that it will be useful,
11         but WITHOUT ANY WARRANTY; without even the implied warranty of
12         MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13         GNU General Public License for more details.
14
15         You should have received a copy of the GNU General Public License
16         along with this program; if not, write to the
17         Free Software Foundation, Inc.,
18         59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19  */
20
21 /*
22         Module: rt2x00lib
23         Abstract: rt2x00 debugfs specific routines.
24  */
25
26 #include <linux/debugfs.h>
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/poll.h>
30 #include <linux/sched.h>
31 #include <linux/slab.h>
32 #include <linux/uaccess.h>
33
34 #include "rt2x00.h"
35 #include "rt2x00lib.h"
36 #include "rt2x00dump.h"
37
38 #define MAX_LINE_LENGTH 64
39
40 struct rt2x00debug_crypto {
41         unsigned long success;
42         unsigned long icv_error;
43         unsigned long mic_error;
44         unsigned long key_error;
45 };
46
47 struct rt2x00debug_intf {
48         /*
49          * Pointer to driver structure where
50          * this debugfs entry belongs to.
51          */
52         struct rt2x00_dev *rt2x00dev;
53
54         /*
55          * Reference to the rt2x00debug structure
56          * which can be used to communicate with
57          * the registers.
58          */
59         const struct rt2x00debug *debug;
60
61         /*
62          * Debugfs entries for:
63          * - driver folder
64          *   - driver file
65          *   - chipset file
66          *   - device flags file
67          *   - register folder
68          *     - csr offset/value files
69          *     - eeprom offset/value files
70          *     - bbp offset/value files
71          *     - rf offset/value files
72          *   - queue folder
73          *     - frame dump file
74          *     - queue stats file
75          *     - crypto stats file
76          */
77         struct dentry *driver_folder;
78         struct dentry *driver_entry;
79         struct dentry *chipset_entry;
80         struct dentry *dev_flags;
81         struct dentry *register_folder;
82         struct dentry *csr_off_entry;
83         struct dentry *csr_val_entry;
84         struct dentry *eeprom_off_entry;
85         struct dentry *eeprom_val_entry;
86         struct dentry *bbp_off_entry;
87         struct dentry *bbp_val_entry;
88         struct dentry *rf_off_entry;
89         struct dentry *rf_val_entry;
90         struct dentry *queue_folder;
91         struct dentry *queue_frame_dump_entry;
92         struct dentry *queue_stats_entry;
93         struct dentry *crypto_stats_entry;
94
95         /*
96          * The frame dump file only allows a single reader,
97          * so we need to store the current state here.
98          */
99         unsigned long frame_dump_flags;
100 #define FRAME_DUMP_FILE_OPEN    1
101
102         /*
103          * We queue each frame before dumping it to the user,
104          * per read command we will pass a single skb structure
105          * so we should be prepared to queue multiple sk buffers
106          * before sending it to userspace.
107          */
108         struct sk_buff_head frame_dump_skbqueue;
109         wait_queue_head_t frame_dump_waitqueue;
110
111         /*
112          * HW crypto statistics.
113          * All statistics are stored separately per cipher type.
114          */
115         struct rt2x00debug_crypto crypto_stats[CIPHER_MAX];
116
117         /*
118          * Driver and chipset files will use a data buffer
119          * that has been created in advance. This will simplify
120          * the code since we can use the debugfs functions.
121          */
122         struct debugfs_blob_wrapper driver_blob;
123         struct debugfs_blob_wrapper chipset_blob;
124
125         /*
126          * Requested offset for each register type.
127          */
128         unsigned int offset_csr;
129         unsigned int offset_eeprom;
130         unsigned int offset_bbp;
131         unsigned int offset_rf;
132 };
133
134 void rt2x00debug_update_crypto(struct rt2x00_dev *rt2x00dev,
135                                struct rxdone_entry_desc *rxdesc)
136 {
137         struct rt2x00debug_intf *intf = rt2x00dev->debugfs_intf;
138         enum cipher cipher = rxdesc->cipher;
139         enum rx_crypto status = rxdesc->cipher_status;
140
141         if (cipher == CIPHER_TKIP_NO_MIC)
142                 cipher = CIPHER_TKIP;
143         if (cipher == CIPHER_NONE || cipher >= CIPHER_MAX)
144                 return;
145
146         /* Remove CIPHER_NONE index */
147         cipher--;
148
149         intf->crypto_stats[cipher].success += (status == RX_CRYPTO_SUCCESS);
150         intf->crypto_stats[cipher].icv_error += (status == RX_CRYPTO_FAIL_ICV);
151         intf->crypto_stats[cipher].mic_error += (status == RX_CRYPTO_FAIL_MIC);
152         intf->crypto_stats[cipher].key_error += (status == RX_CRYPTO_FAIL_KEY);
153 }
154
155 void rt2x00debug_dump_frame(struct rt2x00_dev *rt2x00dev,
156                             enum rt2x00_dump_type type, struct sk_buff *skb)
157 {
158         struct rt2x00debug_intf *intf = rt2x00dev->debugfs_intf;
159         struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb);
160         struct sk_buff *skbcopy;
161         struct rt2x00dump_hdr *dump_hdr;
162         struct timeval timestamp;
163         u32 data_len;
164
165         if (likely(!test_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags)))
166                 return;
167
168         do_gettimeofday(&timestamp);
169
170         if (skb_queue_len(&intf->frame_dump_skbqueue) > 20) {
171                 DEBUG(rt2x00dev, "txrx dump queue length exceeded.\n");
172                 return;
173         }
174
175         data_len = skb->len;
176         if (skbdesc->flags & SKBDESC_DESC_IN_SKB)
177                 data_len -= skbdesc->desc_len;
178
179         skbcopy = alloc_skb(sizeof(*dump_hdr) + skbdesc->desc_len + data_len,
180                             GFP_ATOMIC);
181         if (!skbcopy) {
182                 DEBUG(rt2x00dev, "Failed to copy skb for dump.\n");
183                 return;
184         }
185
186         dump_hdr = (struct rt2x00dump_hdr *)skb_put(skbcopy, sizeof(*dump_hdr));
187         dump_hdr->version = cpu_to_le32(DUMP_HEADER_VERSION);
188         dump_hdr->header_length = cpu_to_le32(sizeof(*dump_hdr));
189         dump_hdr->desc_length = cpu_to_le32(skbdesc->desc_len);
190         dump_hdr->data_length = cpu_to_le32(data_len);
191         dump_hdr->chip_rt = cpu_to_le16(rt2x00dev->chip.rt);
192         dump_hdr->chip_rf = cpu_to_le16(rt2x00dev->chip.rf);
193         dump_hdr->chip_rev = cpu_to_le16(rt2x00dev->chip.rev);
194         dump_hdr->type = cpu_to_le16(type);
195         dump_hdr->queue_index = skbdesc->entry->queue->qid;
196         dump_hdr->entry_index = skbdesc->entry->entry_idx;
197         dump_hdr->timestamp_sec = cpu_to_le32(timestamp.tv_sec);
198         dump_hdr->timestamp_usec = cpu_to_le32(timestamp.tv_usec);
199
200         if (!(skbdesc->flags & SKBDESC_DESC_IN_SKB))
201                 memcpy(skb_put(skbcopy, skbdesc->desc_len), skbdesc->desc,
202                        skbdesc->desc_len);
203         memcpy(skb_put(skbcopy, skb->len), skb->data, skb->len);
204
205         skb_queue_tail(&intf->frame_dump_skbqueue, skbcopy);
206         wake_up_interruptible(&intf->frame_dump_waitqueue);
207
208         /*
209          * Verify that the file has not been closed while we were working.
210          */
211         if (!test_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags))
212                 skb_queue_purge(&intf->frame_dump_skbqueue);
213 }
214 EXPORT_SYMBOL_GPL(rt2x00debug_dump_frame);
215
216 static int rt2x00debug_file_open(struct inode *inode, struct file *file)
217 {
218         struct rt2x00debug_intf *intf = inode->i_private;
219
220         file->private_data = inode->i_private;
221
222         if (!try_module_get(intf->debug->owner))
223                 return -EBUSY;
224
225         return 0;
226 }
227
228 static int rt2x00debug_file_release(struct inode *inode, struct file *file)
229 {
230         struct rt2x00debug_intf *intf = file->private_data;
231
232         module_put(intf->debug->owner);
233
234         return 0;
235 }
236
237 static int rt2x00debug_open_queue_dump(struct inode *inode, struct file *file)
238 {
239         struct rt2x00debug_intf *intf = inode->i_private;
240         int retval;
241
242         retval = rt2x00debug_file_open(inode, file);
243         if (retval)
244                 return retval;
245
246         if (test_and_set_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags)) {
247                 rt2x00debug_file_release(inode, file);
248                 return -EBUSY;
249         }
250
251         return 0;
252 }
253
254 static int rt2x00debug_release_queue_dump(struct inode *inode, struct file *file)
255 {
256         struct rt2x00debug_intf *intf = inode->i_private;
257
258         skb_queue_purge(&intf->frame_dump_skbqueue);
259
260         clear_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags);
261
262         return rt2x00debug_file_release(inode, file);
263 }
264
265 static ssize_t rt2x00debug_read_queue_dump(struct file *file,
266                                            char __user *buf,
267                                            size_t length,
268                                            loff_t *offset)
269 {
270         struct rt2x00debug_intf *intf = file->private_data;
271         struct sk_buff *skb;
272         size_t status;
273         int retval;
274
275         if (file->f_flags & O_NONBLOCK)
276                 return -EAGAIN;
277
278         retval =
279             wait_event_interruptible(intf->frame_dump_waitqueue,
280                                      (skb =
281                                      skb_dequeue(&intf->frame_dump_skbqueue)));
282         if (retval)
283                 return retval;
284
285         status = min((size_t)skb->len, length);
286         if (copy_to_user(buf, skb->data, status)) {
287                 status = -EFAULT;
288                 goto exit;
289         }
290
291         *offset += status;
292
293 exit:
294         kfree_skb(skb);
295
296         return status;
297 }
298
299 static unsigned int rt2x00debug_poll_queue_dump(struct file *file,
300                                                 poll_table *wait)
301 {
302         struct rt2x00debug_intf *intf = file->private_data;
303
304         poll_wait(file, &intf->frame_dump_waitqueue, wait);
305
306         if (!skb_queue_empty(&intf->frame_dump_skbqueue))
307                 return POLLOUT | POLLWRNORM;
308
309         return 0;
310 }
311
312 static const struct file_operations rt2x00debug_fop_queue_dump = {
313         .owner          = THIS_MODULE,
314         .read           = rt2x00debug_read_queue_dump,
315         .poll           = rt2x00debug_poll_queue_dump,
316         .open           = rt2x00debug_open_queue_dump,
317         .release        = rt2x00debug_release_queue_dump,
318         .llseek         = default_llseek,
319 };
320
321 static ssize_t rt2x00debug_read_queue_stats(struct file *file,
322                                             char __user *buf,
323                                             size_t length,
324                                             loff_t *offset)
325 {
326         struct rt2x00debug_intf *intf = file->private_data;
327         struct data_queue *queue;
328         unsigned long irqflags;
329         unsigned int lines = 1 + intf->rt2x00dev->data_queues;
330         size_t size;
331         char *data;
332         char *temp;
333
334         if (*offset)
335                 return 0;
336
337         data = kcalloc(lines, MAX_LINE_LENGTH, GFP_KERNEL);
338         if (!data)
339                 return -ENOMEM;
340
341         temp = data +
342             sprintf(data, "qid\tflags\t\tcount\tlimit\tlength\tindex\tdma done\tdone\n");
343
344         queue_for_each(intf->rt2x00dev, queue) {
345                 spin_lock_irqsave(&queue->index_lock, irqflags);
346
347                 temp += sprintf(temp, "%d\t0x%.8x\t%d\t%d\t%d\t%d\t%d\t\t%d\n",
348                                 queue->qid, (unsigned int)queue->flags,
349                                 queue->count, queue->limit, queue->length,
350                                 queue->index[Q_INDEX],
351                                 queue->index[Q_INDEX_DMA_DONE],
352                                 queue->index[Q_INDEX_DONE]);
353
354                 spin_unlock_irqrestore(&queue->index_lock, irqflags);
355         }
356
357         size = strlen(data);
358         size = min(size, length);
359
360         if (copy_to_user(buf, data, size)) {
361                 kfree(data);
362                 return -EFAULT;
363         }
364
365         kfree(data);
366
367         *offset += size;
368         return size;
369 }
370
371 static const struct file_operations rt2x00debug_fop_queue_stats = {
372         .owner          = THIS_MODULE,
373         .read           = rt2x00debug_read_queue_stats,
374         .open           = rt2x00debug_file_open,
375         .release        = rt2x00debug_file_release,
376         .llseek         = default_llseek,
377 };
378
379 #ifdef CONFIG_RT2X00_LIB_CRYPTO
380 static ssize_t rt2x00debug_read_crypto_stats(struct file *file,
381                                              char __user *buf,
382                                              size_t length,
383                                              loff_t *offset)
384 {
385         struct rt2x00debug_intf *intf = file->private_data;
386         static const char * const name[] = { "WEP64", "WEP128", "TKIP", "AES" };
387         char *data;
388         char *temp;
389         size_t size;
390         unsigned int i;
391
392         if (*offset)
393                 return 0;
394
395         data = kzalloc((1 + CIPHER_MAX) * MAX_LINE_LENGTH, GFP_KERNEL);
396         if (!data)
397                 return -ENOMEM;
398
399         temp = data;
400         temp += sprintf(data, "cipher\tsuccess\ticv err\tmic err\tkey err\n");
401
402         for (i = 0; i < CIPHER_MAX; i++) {
403                 temp += sprintf(temp, "%s\t%lu\t%lu\t%lu\t%lu\n", name[i],
404                                 intf->crypto_stats[i].success,
405                                 intf->crypto_stats[i].icv_error,
406                                 intf->crypto_stats[i].mic_error,
407                                 intf->crypto_stats[i].key_error);
408         }
409
410         size = strlen(data);
411         size = min(size, length);
412
413         if (copy_to_user(buf, data, size)) {
414                 kfree(data);
415                 return -EFAULT;
416         }
417
418         kfree(data);
419
420         *offset += size;
421         return size;
422 }
423
424 static const struct file_operations rt2x00debug_fop_crypto_stats = {
425         .owner          = THIS_MODULE,
426         .read           = rt2x00debug_read_crypto_stats,
427         .open           = rt2x00debug_file_open,
428         .release        = rt2x00debug_file_release,
429         .llseek         = default_llseek,
430 };
431 #endif
432
433 #define RT2X00DEBUGFS_OPS_READ(__name, __format, __type)        \
434 static ssize_t rt2x00debug_read_##__name(struct file *file,     \
435                                          char __user *buf,      \
436                                          size_t length,         \
437                                          loff_t *offset)        \
438 {                                                               \
439         struct rt2x00debug_intf *intf = file->private_data;     \
440         const struct rt2x00debug *debug = intf->debug;          \
441         char line[16];                                          \
442         size_t size;                                            \
443         unsigned int index = intf->offset_##__name;             \
444         __type value;                                           \
445                                                                 \
446         if (*offset)                                            \
447                 return 0;                                       \
448                                                                 \
449         if (index >= debug->__name.word_count)                  \
450                 return -EINVAL;                                 \
451                                                                 \
452         index += (debug->__name.word_base /                     \
453                   debug->__name.word_size);                     \
454                                                                 \
455         if (debug->__name.flags & RT2X00DEBUGFS_OFFSET)         \
456                 index *= debug->__name.word_size;               \
457                                                                 \
458         debug->__name.read(intf->rt2x00dev, index, &value);     \
459                                                                 \
460         size = sprintf(line, __format, value);                  \
461                                                                 \
462         if (copy_to_user(buf, line, size))                      \
463                 return -EFAULT;                                 \
464                                                                 \
465         *offset += size;                                        \
466         return size;                                            \
467 }
468
469 #define RT2X00DEBUGFS_OPS_WRITE(__name, __type)                 \
470 static ssize_t rt2x00debug_write_##__name(struct file *file,    \
471                                           const char __user *buf,\
472                                           size_t length,        \
473                                           loff_t *offset)       \
474 {                                                               \
475         struct rt2x00debug_intf *intf = file->private_data;     \
476         const struct rt2x00debug *debug = intf->debug;          \
477         char line[16];                                          \
478         size_t size;                                            \
479         unsigned int index = intf->offset_##__name;             \
480         __type value;                                           \
481                                                                 \
482         if (*offset)                                            \
483                 return 0;                                       \
484                                                                 \
485         if (index >= debug->__name.word_count)                  \
486                 return -EINVAL;                                 \
487                                                                 \
488         if (length > sizeof(line))                              \
489                 return -EINVAL;                                 \
490                                                                 \
491         if (copy_from_user(line, buf, length))                  \
492                 return -EFAULT;                                 \
493                                                                 \
494         size = strlen(line);                                    \
495         value = simple_strtoul(line, NULL, 0);                  \
496                                                                 \
497         index += (debug->__name.word_base /                     \
498                   debug->__name.word_size);                     \
499                                                                 \
500         if (debug->__name.flags & RT2X00DEBUGFS_OFFSET)         \
501                 index *= debug->__name.word_size;               \
502                                                                 \
503         debug->__name.write(intf->rt2x00dev, index, value);     \
504                                                                 \
505         *offset += size;                                        \
506         return size;                                            \
507 }
508
509 #define RT2X00DEBUGFS_OPS(__name, __format, __type)             \
510 RT2X00DEBUGFS_OPS_READ(__name, __format, __type);               \
511 RT2X00DEBUGFS_OPS_WRITE(__name, __type);                        \
512                                                                 \
513 static const struct file_operations rt2x00debug_fop_##__name = {\
514         .owner          = THIS_MODULE,                          \
515         .read           = rt2x00debug_read_##__name,            \
516         .write          = rt2x00debug_write_##__name,           \
517         .open           = rt2x00debug_file_open,                \
518         .release        = rt2x00debug_file_release,             \
519         .llseek         = generic_file_llseek,                  \
520 };
521
522 RT2X00DEBUGFS_OPS(csr, "0x%.8x\n", u32);
523 RT2X00DEBUGFS_OPS(eeprom, "0x%.4x\n", u16);
524 RT2X00DEBUGFS_OPS(bbp, "0x%.2x\n", u8);
525 RT2X00DEBUGFS_OPS(rf, "0x%.8x\n", u32);
526
527 static ssize_t rt2x00debug_read_dev_flags(struct file *file,
528                                           char __user *buf,
529                                           size_t length,
530                                           loff_t *offset)
531 {
532         struct rt2x00debug_intf *intf = file->private_data;
533         char line[16];
534         size_t size;
535
536         if (*offset)
537                 return 0;
538
539         size = sprintf(line, "0x%.8x\n", (unsigned int)intf->rt2x00dev->flags);
540
541         if (copy_to_user(buf, line, size))
542                 return -EFAULT;
543
544         *offset += size;
545         return size;
546 }
547
548 static const struct file_operations rt2x00debug_fop_dev_flags = {
549         .owner          = THIS_MODULE,
550         .read           = rt2x00debug_read_dev_flags,
551         .open           = rt2x00debug_file_open,
552         .release        = rt2x00debug_file_release,
553         .llseek         = default_llseek,
554 };
555
556 static struct dentry *rt2x00debug_create_file_driver(const char *name,
557                                                      struct rt2x00debug_intf
558                                                      *intf,
559                                                      struct debugfs_blob_wrapper
560                                                      *blob)
561 {
562         char *data;
563
564         data = kzalloc(3 * MAX_LINE_LENGTH, GFP_KERNEL);
565         if (!data)
566                 return NULL;
567
568         blob->data = data;
569         data += sprintf(data, "driver:\t%s\n", intf->rt2x00dev->ops->name);
570         data += sprintf(data, "version:\t%s\n", DRV_VERSION);
571         blob->size = strlen(blob->data);
572
573         return debugfs_create_blob(name, S_IRUSR, intf->driver_folder, blob);
574 }
575
576 static struct dentry *rt2x00debug_create_file_chipset(const char *name,
577                                                       struct rt2x00debug_intf
578                                                       *intf,
579                                                       struct
580                                                       debugfs_blob_wrapper
581                                                       *blob)
582 {
583         const struct rt2x00debug *debug = intf->debug;
584         char *data;
585
586         data = kzalloc(8 * MAX_LINE_LENGTH, GFP_KERNEL);
587         if (!data)
588                 return NULL;
589
590         blob->data = data;
591         data += sprintf(data, "rt chip:\t%04x\n", intf->rt2x00dev->chip.rt);
592         data += sprintf(data, "rf chip:\t%04x\n", intf->rt2x00dev->chip.rf);
593         data += sprintf(data, "revision:\t%04x\n", intf->rt2x00dev->chip.rev);
594         data += sprintf(data, "\n");
595         data += sprintf(data, "register\tbase\twords\twordsize\n");
596         data += sprintf(data, "csr\t%d\t%d\t%d\n",
597                         debug->csr.word_base,
598                         debug->csr.word_count,
599                         debug->csr.word_size);
600         data += sprintf(data, "eeprom\t%d\t%d\t%d\n",
601                         debug->eeprom.word_base,
602                         debug->eeprom.word_count,
603                         debug->eeprom.word_size);
604         data += sprintf(data, "bbp\t%d\t%d\t%d\n",
605                         debug->bbp.word_base,
606                         debug->bbp.word_count,
607                         debug->bbp.word_size);
608         data += sprintf(data, "rf\t%d\t%d\t%d\n",
609                         debug->rf.word_base,
610                         debug->rf.word_count,
611                         debug->rf.word_size);
612         blob->size = strlen(blob->data);
613
614         return debugfs_create_blob(name, S_IRUSR, intf->driver_folder, blob);
615 }
616
617 void rt2x00debug_register(struct rt2x00_dev *rt2x00dev)
618 {
619         const struct rt2x00debug *debug = rt2x00dev->ops->debugfs;
620         struct rt2x00debug_intf *intf;
621
622         intf = kzalloc(sizeof(struct rt2x00debug_intf), GFP_KERNEL);
623         if (!intf) {
624                 ERROR(rt2x00dev, "Failed to allocate debug handler.\n");
625                 return;
626         }
627
628         intf->debug = debug;
629         intf->rt2x00dev = rt2x00dev;
630         rt2x00dev->debugfs_intf = intf;
631
632         intf->driver_folder =
633             debugfs_create_dir(intf->rt2x00dev->ops->name,
634                                rt2x00dev->hw->wiphy->debugfsdir);
635         if (IS_ERR(intf->driver_folder) || !intf->driver_folder)
636                 goto exit;
637
638         intf->driver_entry =
639             rt2x00debug_create_file_driver("driver", intf, &intf->driver_blob);
640         if (IS_ERR(intf->driver_entry) || !intf->driver_entry)
641                 goto exit;
642
643         intf->chipset_entry =
644             rt2x00debug_create_file_chipset("chipset",
645                                             intf, &intf->chipset_blob);
646         if (IS_ERR(intf->chipset_entry) || !intf->chipset_entry)
647                 goto exit;
648
649         intf->dev_flags = debugfs_create_file("dev_flags", S_IRUSR,
650                                               intf->driver_folder, intf,
651                                               &rt2x00debug_fop_dev_flags);
652         if (IS_ERR(intf->dev_flags) || !intf->dev_flags)
653                 goto exit;
654
655         intf->register_folder =
656             debugfs_create_dir("register", intf->driver_folder);
657         if (IS_ERR(intf->register_folder) || !intf->register_folder)
658                 goto exit;
659
660 #define RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(__intf, __name)     \
661 ({                                                              \
662         (__intf)->__name##_off_entry =                          \
663             debugfs_create_u32(__stringify(__name) "_offset",   \
664                                S_IRUSR | S_IWUSR,               \
665                                (__intf)->register_folder,       \
666                                &(__intf)->offset_##__name);     \
667         if (IS_ERR((__intf)->__name##_off_entry)                \
668                         || !(__intf)->__name##_off_entry)       \
669                 goto exit;                                      \
670                                                                 \
671         (__intf)->__name##_val_entry =                          \
672             debugfs_create_file(__stringify(__name) "_value",   \
673                                 S_IRUSR | S_IWUSR,              \
674                                 (__intf)->register_folder,      \
675                                 (__intf), &rt2x00debug_fop_##__name);\
676         if (IS_ERR((__intf)->__name##_val_entry)                \
677                         || !(__intf)->__name##_val_entry)       \
678                 goto exit;                                      \
679 })
680
681         RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, csr);
682         RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, eeprom);
683         RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, bbp);
684         RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, rf);
685
686 #undef RT2X00DEBUGFS_CREATE_REGISTER_ENTRY
687
688         intf->queue_folder =
689             debugfs_create_dir("queue", intf->driver_folder);
690         if (IS_ERR(intf->queue_folder) || !intf->queue_folder)
691                 goto exit;
692
693         intf->queue_frame_dump_entry =
694             debugfs_create_file("dump", S_IRUSR, intf->queue_folder,
695                                 intf, &rt2x00debug_fop_queue_dump);
696         if (IS_ERR(intf->queue_frame_dump_entry)
697                 || !intf->queue_frame_dump_entry)
698                 goto exit;
699
700         skb_queue_head_init(&intf->frame_dump_skbqueue);
701         init_waitqueue_head(&intf->frame_dump_waitqueue);
702
703         intf->queue_stats_entry =
704             debugfs_create_file("queue", S_IRUSR, intf->queue_folder,
705                                 intf, &rt2x00debug_fop_queue_stats);
706
707 #ifdef CONFIG_RT2X00_LIB_CRYPTO
708         if (test_bit(CONFIG_SUPPORT_HW_CRYPTO, &rt2x00dev->flags))
709                 intf->crypto_stats_entry =
710                     debugfs_create_file("crypto", S_IRUGO, intf->queue_folder,
711                                         intf, &rt2x00debug_fop_crypto_stats);
712 #endif
713
714         return;
715
716 exit:
717         rt2x00debug_deregister(rt2x00dev);
718         ERROR(rt2x00dev, "Failed to register debug handler.\n");
719 }
720
721 void rt2x00debug_deregister(struct rt2x00_dev *rt2x00dev)
722 {
723         struct rt2x00debug_intf *intf = rt2x00dev->debugfs_intf;
724
725         if (unlikely(!intf))
726                 return;
727
728         skb_queue_purge(&intf->frame_dump_skbqueue);
729
730 #ifdef CONFIG_RT2X00_LIB_CRYPTO
731         debugfs_remove(intf->crypto_stats_entry);
732 #endif
733         debugfs_remove(intf->queue_stats_entry);
734         debugfs_remove(intf->queue_frame_dump_entry);
735         debugfs_remove(intf->queue_folder);
736         debugfs_remove(intf->rf_val_entry);
737         debugfs_remove(intf->rf_off_entry);
738         debugfs_remove(intf->bbp_val_entry);
739         debugfs_remove(intf->bbp_off_entry);
740         debugfs_remove(intf->eeprom_val_entry);
741         debugfs_remove(intf->eeprom_off_entry);
742         debugfs_remove(intf->csr_val_entry);
743         debugfs_remove(intf->csr_off_entry);
744         debugfs_remove(intf->register_folder);
745         debugfs_remove(intf->dev_flags);
746         debugfs_remove(intf->chipset_entry);
747         debugfs_remove(intf->driver_entry);
748         debugfs_remove(intf->driver_folder);
749         kfree(intf->chipset_blob.data);
750         kfree(intf->driver_blob.data);
751         kfree(intf);
752
753         rt2x00dev->debugfs_intf = NULL;
754 }