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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
40struct rt2x00debug_crypto {
41 unsigned long success;
42 unsigned long icv_error;
43 unsigned long mic_error;
44 unsigned long key_error;
45};
46
47struct rt2x00debug_intf {
48 /*
49 * Pointer to driver structure where
50 * this debugfs entry belongs to.
51 */
52 struct rt2x00_dev *rt2x00dev;
53
54 /*
55 * Reference to the rt2x00debug structure
56 * which can be used to communicate with
57 * the registers.
58 */
59 const struct rt2x00debug *debug;
60
61 /*
62 * Debugfs entries for:
63 * - driver folder
64 * - driver file
65 * - chipset file
66 * - device state flags file
67 * - device capability flags file
68 * - register folder
69 * - csr offset/value files
70 * - eeprom offset/value files
71 * - bbp offset/value files
72 * - rf offset/value files
73 * - queue folder
74 * - frame dump file
75 * - queue stats file
76 * - crypto stats file
77 */
78 struct dentry *driver_folder;
79 struct dentry *driver_entry;
80 struct dentry *chipset_entry;
81 struct dentry *dev_flags;
82 struct dentry *cap_flags;
83 struct dentry *register_folder;
84 struct dentry *csr_off_entry;
85 struct dentry *csr_val_entry;
86 struct dentry *eeprom_off_entry;
87 struct dentry *eeprom_val_entry;
88 struct dentry *bbp_off_entry;
89 struct dentry *bbp_val_entry;
90 struct dentry *rf_off_entry;
91 struct dentry *rf_val_entry;
92 struct dentry *queue_folder;
93 struct dentry *queue_frame_dump_entry;
94 struct dentry *queue_stats_entry;
95 struct dentry *crypto_stats_entry;
96
97 /*
98 * The frame dump file only allows a single reader,
99 * so we need to store the current state here.
100 */
101 unsigned long frame_dump_flags;
102#define FRAME_DUMP_FILE_OPEN 1
103
104 /*
105 * We queue each frame before dumping it to the user,
106 * per read command we will pass a single skb structure
107 * so we should be prepared to queue multiple sk buffers
108 * before sending it to userspace.
109 */
110 struct sk_buff_head frame_dump_skbqueue;
111 wait_queue_head_t frame_dump_waitqueue;
112
113 /*
114 * HW crypto statistics.
115 * All statistics are stored separately per cipher type.
116 */
117 struct rt2x00debug_crypto crypto_stats[CIPHER_MAX];
118
119 /*
120 * Driver and chipset files will use a data buffer
121 * that has been created in advance. This will simplify
122 * the code since we can use the debugfs functions.
123 */
124 struct debugfs_blob_wrapper driver_blob;
125 struct debugfs_blob_wrapper chipset_blob;
126
127 /*
128 * Requested offset for each register type.
129 */
130 unsigned int offset_csr;
131 unsigned int offset_eeprom;
132 unsigned int offset_bbp;
133 unsigned int offset_rf;
134};
135
136void rt2x00debug_update_crypto(struct rt2x00_dev *rt2x00dev,
137 struct rxdone_entry_desc *rxdesc)
138{
139 struct rt2x00debug_intf *intf = rt2x00dev->debugfs_intf;
140 enum cipher cipher = rxdesc->cipher;
141 enum rx_crypto status = rxdesc->cipher_status;
142
143 if (cipher == CIPHER_TKIP_NO_MIC)
144 cipher = CIPHER_TKIP;
145 if (cipher == CIPHER_NONE || cipher >= CIPHER_MAX)
146 return;
147
148 /* Remove CIPHER_NONE index */
149 cipher--;
150
151 intf->crypto_stats[cipher].success += (status == RX_CRYPTO_SUCCESS);
152 intf->crypto_stats[cipher].icv_error += (status == RX_CRYPTO_FAIL_ICV);
153 intf->crypto_stats[cipher].mic_error += (status == RX_CRYPTO_FAIL_MIC);
154 intf->crypto_stats[cipher].key_error += (status == RX_CRYPTO_FAIL_KEY);
155}
156
157void rt2x00debug_dump_frame(struct rt2x00_dev *rt2x00dev,
158 enum rt2x00_dump_type type, struct sk_buff *skb)
159{
160 struct rt2x00debug_intf *intf = rt2x00dev->debugfs_intf;
161 struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb);
162 struct sk_buff *skbcopy;
163 struct rt2x00dump_hdr *dump_hdr;
164 struct timeval timestamp;
165 u32 data_len;
166
167 if (likely(!test_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags)))
168 return;
169
170 do_gettimeofday(×tamp);
171
172 if (skb_queue_len(&intf->frame_dump_skbqueue) > 20) {
173 DEBUG(rt2x00dev, "txrx dump queue length exceeded.\n");
174 return;
175 }
176
177 data_len = skb->len;
178 if (skbdesc->flags & SKBDESC_DESC_IN_SKB)
179 data_len -= skbdesc->desc_len;
180
181 skbcopy = alloc_skb(sizeof(*dump_hdr) + skbdesc->desc_len + data_len,
182 GFP_ATOMIC);
183 if (!skbcopy) {
184 DEBUG(rt2x00dev, "Failed to copy skb for dump.\n");
185 return;
186 }
187
188 dump_hdr = (struct rt2x00dump_hdr *)skb_put(skbcopy, sizeof(*dump_hdr));
189 dump_hdr->version = cpu_to_le32(DUMP_HEADER_VERSION);
190 dump_hdr->header_length = cpu_to_le32(sizeof(*dump_hdr));
191 dump_hdr->desc_length = cpu_to_le32(skbdesc->desc_len);
192 dump_hdr->data_length = cpu_to_le32(data_len);
193 dump_hdr->chip_rt = cpu_to_le16(rt2x00dev->chip.rt);
194 dump_hdr->chip_rf = cpu_to_le16(rt2x00dev->chip.rf);
195 dump_hdr->chip_rev = cpu_to_le16(rt2x00dev->chip.rev);
196 dump_hdr->type = cpu_to_le16(type);
197 dump_hdr->queue_index = skbdesc->entry->queue->qid;
198 dump_hdr->entry_index = skbdesc->entry->entry_idx;
199 dump_hdr->timestamp_sec = cpu_to_le32(timestamp.tv_sec);
200 dump_hdr->timestamp_usec = cpu_to_le32(timestamp.tv_usec);
201
202 if (!(skbdesc->flags & SKBDESC_DESC_IN_SKB))
203 memcpy(skb_put(skbcopy, skbdesc->desc_len), skbdesc->desc,
204 skbdesc->desc_len);
205 memcpy(skb_put(skbcopy, skb->len), skb->data, skb->len);
206
207 skb_queue_tail(&intf->frame_dump_skbqueue, skbcopy);
208 wake_up_interruptible(&intf->frame_dump_waitqueue);
209
210 /*
211 * Verify that the file has not been closed while we were working.
212 */
213 if (!test_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags))
214 skb_queue_purge(&intf->frame_dump_skbqueue);
215}
216EXPORT_SYMBOL_GPL(rt2x00debug_dump_frame);
217
218static int rt2x00debug_file_open(struct inode *inode, struct file *file)
219{
220 struct rt2x00debug_intf *intf = inode->i_private;
221
222 file->private_data = inode->i_private;
223
224 if (!try_module_get(intf->debug->owner))
225 return -EBUSY;
226
227 return 0;
228}
229
230static int rt2x00debug_file_release(struct inode *inode, struct file *file)
231{
232 struct rt2x00debug_intf *intf = file->private_data;
233
234 module_put(intf->debug->owner);
235
236 return 0;
237}
238
239static int rt2x00debug_open_queue_dump(struct inode *inode, struct file *file)
240{
241 struct rt2x00debug_intf *intf = inode->i_private;
242 int retval;
243
244 retval = rt2x00debug_file_open(inode, file);
245 if (retval)
246 return retval;
247
248 if (test_and_set_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags)) {
249 rt2x00debug_file_release(inode, file);
250 return -EBUSY;
251 }
252
253 return 0;
254}
255
256static int rt2x00debug_release_queue_dump(struct inode *inode, struct file *file)
257{
258 struct rt2x00debug_intf *intf = inode->i_private;
259
260 skb_queue_purge(&intf->frame_dump_skbqueue);
261
262 clear_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags);
263
264 return rt2x00debug_file_release(inode, file);
265}
266
267static ssize_t rt2x00debug_read_queue_dump(struct file *file,
268 char __user *buf,
269 size_t length,
270 loff_t *offset)
271{
272 struct rt2x00debug_intf *intf = file->private_data;
273 struct sk_buff *skb;
274 size_t status;
275 int retval;
276
277 if (file->f_flags & O_NONBLOCK)
278 return -EAGAIN;
279
280 retval =
281 wait_event_interruptible(intf->frame_dump_waitqueue,
282 (skb =
283 skb_dequeue(&intf->frame_dump_skbqueue)));
284 if (retval)
285 return retval;
286
287 status = min((size_t)skb->len, length);
288 if (copy_to_user(buf, skb->data, status)) {
289 status = -EFAULT;
290 goto exit;
291 }
292
293 *offset += status;
294
295exit:
296 kfree_skb(skb);
297
298 return status;
299}
300
301static unsigned int rt2x00debug_poll_queue_dump(struct file *file,
302 poll_table *wait)
303{
304 struct rt2x00debug_intf *intf = file->private_data;
305
306 poll_wait(file, &intf->frame_dump_waitqueue, wait);
307
308 if (!skb_queue_empty(&intf->frame_dump_skbqueue))
309 return POLLOUT | POLLWRNORM;
310
311 return 0;
312}
313
314static const struct file_operations rt2x00debug_fop_queue_dump = {
315 .owner = THIS_MODULE,
316 .read = rt2x00debug_read_queue_dump,
317 .poll = rt2x00debug_poll_queue_dump,
318 .open = rt2x00debug_open_queue_dump,
319 .release = rt2x00debug_release_queue_dump,
320 .llseek = default_llseek,
321};
322
323static ssize_t rt2x00debug_read_queue_stats(struct file *file,
324 char __user *buf,
325 size_t length,
326 loff_t *offset)
327{
328 struct rt2x00debug_intf *intf = file->private_data;
329 struct data_queue *queue;
330 unsigned long irqflags;
331 unsigned int lines = 1 + intf->rt2x00dev->data_queues;
332 size_t size;
333 char *data;
334 char *temp;
335
336 if (*offset)
337 return 0;
338
339 data = kcalloc(lines, MAX_LINE_LENGTH, GFP_KERNEL);
340 if (!data)
341 return -ENOMEM;
342
343 temp = data +
344 sprintf(data, "qid\tflags\t\tcount\tlimit\tlength\tindex\tdma done\tdone\n");
345
346 queue_for_each(intf->rt2x00dev, queue) {
347 spin_lock_irqsave(&queue->index_lock, irqflags);
348
349 temp += sprintf(temp, "%d\t0x%.8x\t%d\t%d\t%d\t%d\t%d\t\t%d\n",
350 queue->qid, (unsigned int)queue->flags,
351 queue->count, queue->limit, queue->length,
352 queue->index[Q_INDEX],
353 queue->index[Q_INDEX_DMA_DONE],
354 queue->index[Q_INDEX_DONE]);
355
356 spin_unlock_irqrestore(&queue->index_lock, irqflags);
357 }
358
359 size = strlen(data);
360 size = min(size, length);
361
362 if (copy_to_user(buf, data, size)) {
363 kfree(data);
364 return -EFAULT;
365 }
366
367 kfree(data);
368
369 *offset += size;
370 return size;
371}
372
373static const struct file_operations rt2x00debug_fop_queue_stats = {
374 .owner = THIS_MODULE,
375 .read = rt2x00debug_read_queue_stats,
376 .open = rt2x00debug_file_open,
377 .release = rt2x00debug_file_release,
378 .llseek = default_llseek,
379};
380
381#ifdef CONFIG_RT2X00_LIB_CRYPTO
382static ssize_t rt2x00debug_read_crypto_stats(struct file *file,
383 char __user *buf,
384 size_t length,
385 loff_t *offset)
386{
387 struct rt2x00debug_intf *intf = file->private_data;
388 static const char * const name[] = { "WEP64", "WEP128", "TKIP", "AES" };
389 char *data;
390 char *temp;
391 size_t size;
392 unsigned int i;
393
394 if (*offset)
395 return 0;
396
397 data = kzalloc((1 + CIPHER_MAX) * MAX_LINE_LENGTH, GFP_KERNEL);
398 if (!data)
399 return -ENOMEM;
400
401 temp = data;
402 temp += sprintf(data, "cipher\tsuccess\ticv err\tmic err\tkey err\n");
403
404 for (i = 0; i < CIPHER_MAX; i++) {
405 temp += sprintf(temp, "%s\t%lu\t%lu\t%lu\t%lu\n", name[i],
406 intf->crypto_stats[i].success,
407 intf->crypto_stats[i].icv_error,
408 intf->crypto_stats[i].mic_error,
409 intf->crypto_stats[i].key_error);
410 }
411
412 size = strlen(data);
413 size = min(size, length);
414
415 if (copy_to_user(buf, data, size)) {
416 kfree(data);
417 return -EFAULT;
418 }
419
420 kfree(data);
421
422 *offset += size;
423 return size;
424}
425
426static const struct file_operations rt2x00debug_fop_crypto_stats = {
427 .owner = THIS_MODULE,
428 .read = rt2x00debug_read_crypto_stats,
429 .open = rt2x00debug_file_open,
430 .release = rt2x00debug_file_release,
431 .llseek = default_llseek,
432};
433#endif
434
435#define RT2X00DEBUGFS_OPS_READ(__name, __format, __type) \
436static ssize_t rt2x00debug_read_##__name(struct file *file, \
437 char __user *buf, \
438 size_t length, \
439 loff_t *offset) \
440{ \
441 struct rt2x00debug_intf *intf = file->private_data; \
442 const struct rt2x00debug *debug = intf->debug; \
443 char line[16]; \
444 size_t size; \
445 unsigned int index = intf->offset_##__name; \
446 __type value; \
447 \
448 if (*offset) \
449 return 0; \
450 \
451 if (index >= debug->__name.word_count) \
452 return -EINVAL; \
453 \
454 index += (debug->__name.word_base / \
455 debug->__name.word_size); \
456 \
457 if (debug->__name.flags & RT2X00DEBUGFS_OFFSET) \
458 index *= debug->__name.word_size; \
459 \
460 debug->__name.read(intf->rt2x00dev, index, &value); \
461 \
462 size = sprintf(line, __format, value); \
463 \
464 if (copy_to_user(buf, line, size)) \
465 return -EFAULT; \
466 \
467 *offset += size; \
468 return size; \
469}
470
471#define RT2X00DEBUGFS_OPS_WRITE(__name, __type) \
472static ssize_t rt2x00debug_write_##__name(struct file *file, \
473 const char __user *buf,\
474 size_t length, \
475 loff_t *offset) \
476{ \
477 struct rt2x00debug_intf *intf = file->private_data; \
478 const struct rt2x00debug *debug = intf->debug; \
479 char line[16]; \
480 size_t size; \
481 unsigned int index = intf->offset_##__name; \
482 __type value; \
483 \
484 if (*offset) \
485 return 0; \
486 \
487 if (index >= debug->__name.word_count) \
488 return -EINVAL; \
489 \
490 if (length > sizeof(line)) \
491 return -EINVAL; \
492 \
493 if (copy_from_user(line, buf, length)) \
494 return -EFAULT; \
495 \
496 size = strlen(line); \
497 value = simple_strtoul(line, NULL, 0); \
498 \
499 index += (debug->__name.word_base / \
500 debug->__name.word_size); \
501 \
502 if (debug->__name.flags & RT2X00DEBUGFS_OFFSET) \
503 index *= debug->__name.word_size; \
504 \
505 debug->__name.write(intf->rt2x00dev, index, value); \
506 \
507 *offset += size; \
508 return size; \
509}
510
511#define RT2X00DEBUGFS_OPS(__name, __format, __type) \
512RT2X00DEBUGFS_OPS_READ(__name, __format, __type); \
513RT2X00DEBUGFS_OPS_WRITE(__name, __type); \
514 \
515static const struct file_operations rt2x00debug_fop_##__name = {\
516 .owner = THIS_MODULE, \
517 .read = rt2x00debug_read_##__name, \
518 .write = rt2x00debug_write_##__name, \
519 .open = rt2x00debug_file_open, \
520 .release = rt2x00debug_file_release, \
521 .llseek = generic_file_llseek, \
522};
523
524RT2X00DEBUGFS_OPS(csr, "0x%.8x\n", u32);
525RT2X00DEBUGFS_OPS(eeprom, "0x%.4x\n", u16);
526RT2X00DEBUGFS_OPS(bbp, "0x%.2x\n", u8);
527RT2X00DEBUGFS_OPS(rf, "0x%.8x\n", u32);
528
529static ssize_t rt2x00debug_read_dev_flags(struct file *file,
530 char __user *buf,
531 size_t length,
532 loff_t *offset)
533{
534 struct rt2x00debug_intf *intf = file->private_data;
535 char line[16];
536 size_t size;
537
538 if (*offset)
539 return 0;
540
541 size = sprintf(line, "0x%.8x\n", (unsigned int)intf->rt2x00dev->flags);
542
543 if (copy_to_user(buf, line, size))
544 return -EFAULT;
545
546 *offset += size;
547 return size;
548}
549
550static const struct file_operations rt2x00debug_fop_dev_flags = {
551 .owner = THIS_MODULE,
552 .read = rt2x00debug_read_dev_flags,
553 .open = rt2x00debug_file_open,
554 .release = rt2x00debug_file_release,
555 .llseek = default_llseek,
556};
557
558static ssize_t rt2x00debug_read_cap_flags(struct file *file,
559 char __user *buf,
560 size_t length,
561 loff_t *offset)
562{
563 struct rt2x00debug_intf *intf = file->private_data;
564 char line[16];
565 size_t size;
566
567 if (*offset)
568 return 0;
569
570 size = sprintf(line, "0x%.8x\n", (unsigned int)intf->rt2x00dev->cap_flags);
571
572 if (copy_to_user(buf, line, size))
573 return -EFAULT;
574
575 *offset += size;
576 return size;
577}
578
579static const struct file_operations rt2x00debug_fop_cap_flags = {
580 .owner = THIS_MODULE,
581 .read = rt2x00debug_read_cap_flags,
582 .open = rt2x00debug_file_open,
583 .release = rt2x00debug_file_release,
584 .llseek = default_llseek,
585};
586
587static struct dentry *rt2x00debug_create_file_driver(const char *name,
588 struct rt2x00debug_intf
589 *intf,
590 struct debugfs_blob_wrapper
591 *blob)
592{
593 char *data;
594
595 data = kzalloc(3 * MAX_LINE_LENGTH, GFP_KERNEL);
596 if (!data)
597 return NULL;
598
599 blob->data = data;
600 data += sprintf(data, "driver:\t%s\n", intf->rt2x00dev->ops->name);
601 data += sprintf(data, "version:\t%s\n", DRV_VERSION);
602 blob->size = strlen(blob->data);
603
604 return debugfs_create_blob(name, S_IRUSR, intf->driver_folder, blob);
605}
606
607static struct dentry *rt2x00debug_create_file_chipset(const char *name,
608 struct rt2x00debug_intf
609 *intf,
610 struct
611 debugfs_blob_wrapper
612 *blob)
613{
614 const struct rt2x00debug *debug = intf->debug;
615 char *data;
616
617 data = kzalloc(8 * MAX_LINE_LENGTH, GFP_KERNEL);
618 if (!data)
619 return NULL;
620
621 blob->data = data;
622 data += sprintf(data, "rt chip:\t%04x\n", intf->rt2x00dev->chip.rt);
623 data += sprintf(data, "rf chip:\t%04x\n", intf->rt2x00dev->chip.rf);
624 data += sprintf(data, "revision:\t%04x\n", intf->rt2x00dev->chip.rev);
625 data += sprintf(data, "\n");
626 data += sprintf(data, "register\tbase\twords\twordsize\n");
627 data += sprintf(data, "csr\t%d\t%d\t%d\n",
628 debug->csr.word_base,
629 debug->csr.word_count,
630 debug->csr.word_size);
631 data += sprintf(data, "eeprom\t%d\t%d\t%d\n",
632 debug->eeprom.word_base,
633 debug->eeprom.word_count,
634 debug->eeprom.word_size);
635 data += sprintf(data, "bbp\t%d\t%d\t%d\n",
636 debug->bbp.word_base,
637 debug->bbp.word_count,
638 debug->bbp.word_size);
639 data += sprintf(data, "rf\t%d\t%d\t%d\n",
640 debug->rf.word_base,
641 debug->rf.word_count,
642 debug->rf.word_size);
643 blob->size = strlen(blob->data);
644
645 return debugfs_create_blob(name, S_IRUSR, intf->driver_folder, blob);
646}
647
648void rt2x00debug_register(struct rt2x00_dev *rt2x00dev)
649{
650 const struct rt2x00debug *debug = rt2x00dev->ops->debugfs;
651 struct rt2x00debug_intf *intf;
652
653 intf = kzalloc(sizeof(struct rt2x00debug_intf), GFP_KERNEL);
654 if (!intf) {
655 ERROR(rt2x00dev, "Failed to allocate debug handler.\n");
656 return;
657 }
658
659 intf->debug = debug;
660 intf->rt2x00dev = rt2x00dev;
661 rt2x00dev->debugfs_intf = intf;
662
663 intf->driver_folder =
664 debugfs_create_dir(intf->rt2x00dev->ops->name,
665 rt2x00dev->hw->wiphy->debugfsdir);
666 if (IS_ERR(intf->driver_folder) || !intf->driver_folder)
667 goto exit;
668
669 intf->driver_entry =
670 rt2x00debug_create_file_driver("driver", intf, &intf->driver_blob);
671 if (IS_ERR(intf->driver_entry) || !intf->driver_entry)
672 goto exit;
673
674 intf->chipset_entry =
675 rt2x00debug_create_file_chipset("chipset",
676 intf, &intf->chipset_blob);
677 if (IS_ERR(intf->chipset_entry) || !intf->chipset_entry)
678 goto exit;
679
680 intf->dev_flags = debugfs_create_file("dev_flags", S_IRUSR,
681 intf->driver_folder, intf,
682 &rt2x00debug_fop_dev_flags);
683 if (IS_ERR(intf->dev_flags) || !intf->dev_flags)
684 goto exit;
685
686 intf->cap_flags = debugfs_create_file("cap_flags", S_IRUSR,
687 intf->driver_folder, intf,
688 &rt2x00debug_fop_cap_flags);
689 if (IS_ERR(intf->cap_flags) || !intf->cap_flags)
690 goto exit;
691
692 intf->register_folder =
693 debugfs_create_dir("register", intf->driver_folder);
694 if (IS_ERR(intf->register_folder) || !intf->register_folder)
695 goto exit;
696
697#define RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(__intf, __name) \
698({ \
699 (__intf)->__name##_off_entry = \
700 debugfs_create_u32(__stringify(__name) "_offset", \
701 S_IRUSR | S_IWUSR, \
702 (__intf)->register_folder, \
703 &(__intf)->offset_##__name); \
704 if (IS_ERR((__intf)->__name##_off_entry) \
705 || !(__intf)->__name##_off_entry) \
706 goto exit; \
707 \
708 (__intf)->__name##_val_entry = \
709 debugfs_create_file(__stringify(__name) "_value", \
710 S_IRUSR | S_IWUSR, \
711 (__intf)->register_folder, \
712 (__intf), &rt2x00debug_fop_##__name);\
713 if (IS_ERR((__intf)->__name##_val_entry) \
714 || !(__intf)->__name##_val_entry) \
715 goto exit; \
716})
717
718 RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, csr);
719 RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, eeprom);
720 RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, bbp);
721 RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, rf);
722
723#undef RT2X00DEBUGFS_CREATE_REGISTER_ENTRY
724
725 intf->queue_folder =
726 debugfs_create_dir("queue", intf->driver_folder);
727 if (IS_ERR(intf->queue_folder) || !intf->queue_folder)
728 goto exit;
729
730 intf->queue_frame_dump_entry =
731 debugfs_create_file("dump", S_IRUSR, intf->queue_folder,
732 intf, &rt2x00debug_fop_queue_dump);
733 if (IS_ERR(intf->queue_frame_dump_entry)
734 || !intf->queue_frame_dump_entry)
735 goto exit;
736
737 skb_queue_head_init(&intf->frame_dump_skbqueue);
738 init_waitqueue_head(&intf->frame_dump_waitqueue);
739
740 intf->queue_stats_entry =
741 debugfs_create_file("queue", S_IRUSR, intf->queue_folder,
742 intf, &rt2x00debug_fop_queue_stats);
743
744#ifdef CONFIG_RT2X00_LIB_CRYPTO
745 if (test_bit(CAPABILITY_HW_CRYPTO, &rt2x00dev->cap_flags))
746 intf->crypto_stats_entry =
747 debugfs_create_file("crypto", S_IRUGO, intf->queue_folder,
748 intf, &rt2x00debug_fop_crypto_stats);
749#endif
750
751 return;
752
753exit:
754 rt2x00debug_deregister(rt2x00dev);
755 ERROR(rt2x00dev, "Failed to register debug handler.\n");
756}
757
758void rt2x00debug_deregister(struct rt2x00_dev *rt2x00dev)
759{
760 struct rt2x00debug_intf *intf = rt2x00dev->debugfs_intf;
761
762 if (unlikely(!intf))
763 return;
764
765 skb_queue_purge(&intf->frame_dump_skbqueue);
766
767#ifdef CONFIG_RT2X00_LIB_CRYPTO
768 debugfs_remove(intf->crypto_stats_entry);
769#endif
770 debugfs_remove(intf->queue_stats_entry);
771 debugfs_remove(intf->queue_frame_dump_entry);
772 debugfs_remove(intf->queue_folder);
773 debugfs_remove(intf->rf_val_entry);
774 debugfs_remove(intf->rf_off_entry);
775 debugfs_remove(intf->bbp_val_entry);
776 debugfs_remove(intf->bbp_off_entry);
777 debugfs_remove(intf->eeprom_val_entry);
778 debugfs_remove(intf->eeprom_off_entry);
779 debugfs_remove(intf->csr_val_entry);
780 debugfs_remove(intf->csr_off_entry);
781 debugfs_remove(intf->register_folder);
782 debugfs_remove(intf->dev_flags);
783 debugfs_remove(intf->cap_flags);
784 debugfs_remove(intf->chipset_entry);
785 debugfs_remove(intf->driver_entry);
786 debugfs_remove(intf->driver_folder);
787 kfree(intf->chipset_blob.data);
788 kfree(intf->driver_blob.data);
789 kfree(intf);
790
791 rt2x00dev->debugfs_intf = NULL;
792}
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
38struct rt2x00debug_crypto {
39 unsigned long success;
40 unsigned long icv_error;
41 unsigned long mic_error;
42 unsigned long key_error;
43};
44
45struct 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
138void 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
159void rt2x00debug_dump_frame(struct rt2x00_dev *rt2x00dev,
160 enum rt2x00_dump_type type, struct sk_buff *skb)
161{
162 struct rt2x00debug_intf *intf = rt2x00dev->debugfs_intf;
163 struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb);
164 struct sk_buff *skbcopy;
165 struct rt2x00dump_hdr *dump_hdr;
166 struct timeval timestamp;
167 u32 data_len;
168
169 if (likely(!test_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags)))
170 return;
171
172 do_gettimeofday(×tamp);
173
174 if (skb_queue_len(&intf->frame_dump_skbqueue) > 20) {
175 rt2x00_dbg(rt2x00dev, "txrx dump queue length exceeded\n");
176 return;
177 }
178
179 data_len = skb->len;
180 if (skbdesc->flags & SKBDESC_DESC_IN_SKB)
181 data_len -= skbdesc->desc_len;
182
183 skbcopy = alloc_skb(sizeof(*dump_hdr) + skbdesc->desc_len + data_len,
184 GFP_ATOMIC);
185 if (!skbcopy) {
186 rt2x00_dbg(rt2x00dev, "Failed to copy skb for dump\n");
187 return;
188 }
189
190 dump_hdr = (struct rt2x00dump_hdr *)skb_put(skbcopy, sizeof(*dump_hdr));
191 dump_hdr->version = cpu_to_le32(DUMP_HEADER_VERSION);
192 dump_hdr->header_length = cpu_to_le32(sizeof(*dump_hdr));
193 dump_hdr->desc_length = cpu_to_le32(skbdesc->desc_len);
194 dump_hdr->data_length = cpu_to_le32(data_len);
195 dump_hdr->chip_rt = cpu_to_le16(rt2x00dev->chip.rt);
196 dump_hdr->chip_rf = cpu_to_le16(rt2x00dev->chip.rf);
197 dump_hdr->chip_rev = cpu_to_le16(rt2x00dev->chip.rev);
198 dump_hdr->type = cpu_to_le16(type);
199 dump_hdr->queue_index = skbdesc->entry->queue->qid;
200 dump_hdr->entry_index = skbdesc->entry->entry_idx;
201 dump_hdr->timestamp_sec = cpu_to_le32(timestamp.tv_sec);
202 dump_hdr->timestamp_usec = cpu_to_le32(timestamp.tv_usec);
203
204 if (!(skbdesc->flags & SKBDESC_DESC_IN_SKB))
205 memcpy(skb_put(skbcopy, skbdesc->desc_len), skbdesc->desc,
206 skbdesc->desc_len);
207 memcpy(skb_put(skbcopy, skb->len), skb->data, skb->len);
208
209 skb_queue_tail(&intf->frame_dump_skbqueue, skbcopy);
210 wake_up_interruptible(&intf->frame_dump_waitqueue);
211
212 /*
213 * Verify that the file has not been closed while we were working.
214 */
215 if (!test_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags))
216 skb_queue_purge(&intf->frame_dump_skbqueue);
217}
218EXPORT_SYMBOL_GPL(rt2x00debug_dump_frame);
219
220static int rt2x00debug_file_open(struct inode *inode, struct file *file)
221{
222 struct rt2x00debug_intf *intf = inode->i_private;
223
224 file->private_data = inode->i_private;
225
226 if (!try_module_get(intf->debug->owner))
227 return -EBUSY;
228
229 return 0;
230}
231
232static int rt2x00debug_file_release(struct inode *inode, struct file *file)
233{
234 struct rt2x00debug_intf *intf = file->private_data;
235
236 module_put(intf->debug->owner);
237
238 return 0;
239}
240
241static int rt2x00debug_open_queue_dump(struct inode *inode, struct file *file)
242{
243 struct rt2x00debug_intf *intf = inode->i_private;
244 int retval;
245
246 retval = rt2x00debug_file_open(inode, file);
247 if (retval)
248 return retval;
249
250 if (test_and_set_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags)) {
251 rt2x00debug_file_release(inode, file);
252 return -EBUSY;
253 }
254
255 return 0;
256}
257
258static int rt2x00debug_release_queue_dump(struct inode *inode, struct file *file)
259{
260 struct rt2x00debug_intf *intf = inode->i_private;
261
262 skb_queue_purge(&intf->frame_dump_skbqueue);
263
264 clear_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags);
265
266 return rt2x00debug_file_release(inode, file);
267}
268
269static ssize_t rt2x00debug_read_queue_dump(struct file *file,
270 char __user *buf,
271 size_t length,
272 loff_t *offset)
273{
274 struct rt2x00debug_intf *intf = file->private_data;
275 struct sk_buff *skb;
276 size_t status;
277 int retval;
278
279 if (file->f_flags & O_NONBLOCK)
280 return -EAGAIN;
281
282 retval =
283 wait_event_interruptible(intf->frame_dump_waitqueue,
284 (skb =
285 skb_dequeue(&intf->frame_dump_skbqueue)));
286 if (retval)
287 return retval;
288
289 status = min_t(size_t, skb->len, length);
290 if (copy_to_user(buf, skb->data, status)) {
291 status = -EFAULT;
292 goto exit;
293 }
294
295 *offset += status;
296
297exit:
298 kfree_skb(skb);
299
300 return status;
301}
302
303static unsigned int rt2x00debug_poll_queue_dump(struct file *file,
304 poll_table *wait)
305{
306 struct rt2x00debug_intf *intf = file->private_data;
307
308 poll_wait(file, &intf->frame_dump_waitqueue, wait);
309
310 if (!skb_queue_empty(&intf->frame_dump_skbqueue))
311 return POLLOUT | POLLWRNORM;
312
313 return 0;
314}
315
316static const struct file_operations rt2x00debug_fop_queue_dump = {
317 .owner = THIS_MODULE,
318 .read = rt2x00debug_read_queue_dump,
319 .poll = rt2x00debug_poll_queue_dump,
320 .open = rt2x00debug_open_queue_dump,
321 .release = rt2x00debug_release_queue_dump,
322 .llseek = default_llseek,
323};
324
325static ssize_t rt2x00debug_read_queue_stats(struct file *file,
326 char __user *buf,
327 size_t length,
328 loff_t *offset)
329{
330 struct rt2x00debug_intf *intf = file->private_data;
331 struct data_queue *queue;
332 unsigned long irqflags;
333 unsigned int lines = 1 + intf->rt2x00dev->data_queues;
334 size_t size;
335 char *data;
336 char *temp;
337
338 if (*offset)
339 return 0;
340
341 data = kcalloc(lines, MAX_LINE_LENGTH, GFP_KERNEL);
342 if (!data)
343 return -ENOMEM;
344
345 temp = data +
346 sprintf(data, "qid\tflags\t\tcount\tlimit\tlength\tindex\tdma done\tdone\n");
347
348 queue_for_each(intf->rt2x00dev, queue) {
349 spin_lock_irqsave(&queue->index_lock, irqflags);
350
351 temp += sprintf(temp, "%d\t0x%.8x\t%d\t%d\t%d\t%d\t%d\t\t%d\n",
352 queue->qid, (unsigned int)queue->flags,
353 queue->count, queue->limit, queue->length,
354 queue->index[Q_INDEX],
355 queue->index[Q_INDEX_DMA_DONE],
356 queue->index[Q_INDEX_DONE]);
357
358 spin_unlock_irqrestore(&queue->index_lock, irqflags);
359 }
360
361 size = strlen(data);
362 size = min(size, length);
363
364 if (copy_to_user(buf, data, size)) {
365 kfree(data);
366 return -EFAULT;
367 }
368
369 kfree(data);
370
371 *offset += size;
372 return size;
373}
374
375static const struct file_operations rt2x00debug_fop_queue_stats = {
376 .owner = THIS_MODULE,
377 .read = rt2x00debug_read_queue_stats,
378 .open = rt2x00debug_file_open,
379 .release = rt2x00debug_file_release,
380 .llseek = default_llseek,
381};
382
383#ifdef CONFIG_RT2X00_LIB_CRYPTO
384static ssize_t rt2x00debug_read_crypto_stats(struct file *file,
385 char __user *buf,
386 size_t length,
387 loff_t *offset)
388{
389 struct rt2x00debug_intf *intf = file->private_data;
390 static const char * const name[] = { "WEP64", "WEP128", "TKIP", "AES" };
391 char *data;
392 char *temp;
393 size_t size;
394 unsigned int i;
395
396 if (*offset)
397 return 0;
398
399 data = kzalloc((1 + CIPHER_MAX) * MAX_LINE_LENGTH, GFP_KERNEL);
400 if (!data)
401 return -ENOMEM;
402
403 temp = data;
404 temp += sprintf(data, "cipher\tsuccess\ticv err\tmic err\tkey err\n");
405
406 for (i = 0; i < CIPHER_MAX; i++) {
407 temp += sprintf(temp, "%s\t%lu\t%lu\t%lu\t%lu\n", name[i],
408 intf->crypto_stats[i].success,
409 intf->crypto_stats[i].icv_error,
410 intf->crypto_stats[i].mic_error,
411 intf->crypto_stats[i].key_error);
412 }
413
414 size = strlen(data);
415 size = min(size, length);
416
417 if (copy_to_user(buf, data, size)) {
418 kfree(data);
419 return -EFAULT;
420 }
421
422 kfree(data);
423
424 *offset += size;
425 return size;
426}
427
428static const struct file_operations rt2x00debug_fop_crypto_stats = {
429 .owner = THIS_MODULE,
430 .read = rt2x00debug_read_crypto_stats,
431 .open = rt2x00debug_file_open,
432 .release = rt2x00debug_file_release,
433 .llseek = default_llseek,
434};
435#endif
436
437#define RT2X00DEBUGFS_OPS_READ(__name, __format, __type) \
438static ssize_t rt2x00debug_read_##__name(struct file *file, \
439 char __user *buf, \
440 size_t length, \
441 loff_t *offset) \
442{ \
443 struct rt2x00debug_intf *intf = file->private_data; \
444 const struct rt2x00debug *debug = intf->debug; \
445 char line[16]; \
446 size_t size; \
447 unsigned int index = intf->offset_##__name; \
448 __type value; \
449 \
450 if (*offset) \
451 return 0; \
452 \
453 if (index >= debug->__name.word_count) \
454 return -EINVAL; \
455 \
456 index += (debug->__name.word_base / \
457 debug->__name.word_size); \
458 \
459 if (debug->__name.flags & RT2X00DEBUGFS_OFFSET) \
460 index *= debug->__name.word_size; \
461 \
462 debug->__name.read(intf->rt2x00dev, index, &value); \
463 \
464 size = sprintf(line, __format, value); \
465 \
466 if (copy_to_user(buf, line, size)) \
467 return -EFAULT; \
468 \
469 *offset += size; \
470 return size; \
471}
472
473#define RT2X00DEBUGFS_OPS_WRITE(__name, __type) \
474static ssize_t rt2x00debug_write_##__name(struct file *file, \
475 const char __user *buf,\
476 size_t length, \
477 loff_t *offset) \
478{ \
479 struct rt2x00debug_intf *intf = file->private_data; \
480 const struct rt2x00debug *debug = intf->debug; \
481 char line[16]; \
482 size_t size; \
483 unsigned int index = intf->offset_##__name; \
484 __type value; \
485 \
486 if (*offset) \
487 return 0; \
488 \
489 if (index >= debug->__name.word_count) \
490 return -EINVAL; \
491 \
492 if (length > sizeof(line)) \
493 return -EINVAL; \
494 \
495 if (copy_from_user(line, buf, length)) \
496 return -EFAULT; \
497 \
498 size = strlen(line); \
499 value = simple_strtoul(line, NULL, 0); \
500 \
501 index += (debug->__name.word_base / \
502 debug->__name.word_size); \
503 \
504 if (debug->__name.flags & RT2X00DEBUGFS_OFFSET) \
505 index *= debug->__name.word_size; \
506 \
507 debug->__name.write(intf->rt2x00dev, index, value); \
508 \
509 *offset += size; \
510 return size; \
511}
512
513#define RT2X00DEBUGFS_OPS(__name, __format, __type) \
514RT2X00DEBUGFS_OPS_READ(__name, __format, __type); \
515RT2X00DEBUGFS_OPS_WRITE(__name, __type); \
516 \
517static const struct file_operations rt2x00debug_fop_##__name = {\
518 .owner = THIS_MODULE, \
519 .read = rt2x00debug_read_##__name, \
520 .write = rt2x00debug_write_##__name, \
521 .open = rt2x00debug_file_open, \
522 .release = rt2x00debug_file_release, \
523 .llseek = generic_file_llseek, \
524};
525
526RT2X00DEBUGFS_OPS(csr, "0x%.8x\n", u32);
527RT2X00DEBUGFS_OPS(eeprom, "0x%.4x\n", u16);
528RT2X00DEBUGFS_OPS(bbp, "0x%.2x\n", u8);
529RT2X00DEBUGFS_OPS(rf, "0x%.8x\n", u32);
530RT2X00DEBUGFS_OPS(rfcsr, "0x%.2x\n", u8);
531
532static ssize_t rt2x00debug_read_dev_flags(struct file *file,
533 char __user *buf,
534 size_t length,
535 loff_t *offset)
536{
537 struct rt2x00debug_intf *intf = file->private_data;
538 char line[16];
539 size_t size;
540
541 if (*offset)
542 return 0;
543
544 size = sprintf(line, "0x%.8x\n", (unsigned int)intf->rt2x00dev->flags);
545
546 if (copy_to_user(buf, line, size))
547 return -EFAULT;
548
549 *offset += size;
550 return size;
551}
552
553static const struct file_operations rt2x00debug_fop_dev_flags = {
554 .owner = THIS_MODULE,
555 .read = rt2x00debug_read_dev_flags,
556 .open = rt2x00debug_file_open,
557 .release = rt2x00debug_file_release,
558 .llseek = default_llseek,
559};
560
561static ssize_t rt2x00debug_read_cap_flags(struct file *file,
562 char __user *buf,
563 size_t length,
564 loff_t *offset)
565{
566 struct rt2x00debug_intf *intf = file->private_data;
567 char line[16];
568 size_t size;
569
570 if (*offset)
571 return 0;
572
573 size = sprintf(line, "0x%.8x\n", (unsigned int)intf->rt2x00dev->cap_flags);
574
575 if (copy_to_user(buf, line, size))
576 return -EFAULT;
577
578 *offset += size;
579 return size;
580}
581
582static const struct file_operations rt2x00debug_fop_cap_flags = {
583 .owner = THIS_MODULE,
584 .read = rt2x00debug_read_cap_flags,
585 .open = rt2x00debug_file_open,
586 .release = rt2x00debug_file_release,
587 .llseek = default_llseek,
588};
589
590static struct dentry *rt2x00debug_create_file_driver(const char *name,
591 struct rt2x00debug_intf
592 *intf,
593 struct debugfs_blob_wrapper
594 *blob)
595{
596 char *data;
597
598 data = kzalloc(3 * MAX_LINE_LENGTH, GFP_KERNEL);
599 if (!data)
600 return NULL;
601
602 blob->data = data;
603 data += sprintf(data, "driver:\t%s\n", intf->rt2x00dev->ops->name);
604 data += sprintf(data, "version:\t%s\n", DRV_VERSION);
605 blob->size = strlen(blob->data);
606
607 return debugfs_create_blob(name, S_IRUSR, intf->driver_folder, blob);
608}
609
610static struct dentry *rt2x00debug_create_file_chipset(const char *name,
611 struct rt2x00debug_intf
612 *intf,
613 struct
614 debugfs_blob_wrapper
615 *blob)
616{
617 const struct rt2x00debug *debug = intf->debug;
618 char *data;
619
620 data = kzalloc(9 * MAX_LINE_LENGTH, GFP_KERNEL);
621 if (!data)
622 return NULL;
623
624 blob->data = data;
625 data += sprintf(data, "rt chip:\t%04x\n", intf->rt2x00dev->chip.rt);
626 data += sprintf(data, "rf chip:\t%04x\n", intf->rt2x00dev->chip.rf);
627 data += sprintf(data, "revision:\t%04x\n", intf->rt2x00dev->chip.rev);
628 data += sprintf(data, "\n");
629 data += sprintf(data, "register\tbase\twords\twordsize\n");
630#define RT2X00DEBUGFS_SPRINTF_REGISTER(__name) \
631{ \
632 if(debug->__name.read) \
633 data += sprintf(data, __stringify(__name) \
634 "\t%d\t%d\t%d\n", \
635 debug->__name.word_base, \
636 debug->__name.word_count, \
637 debug->__name.word_size); \
638}
639 RT2X00DEBUGFS_SPRINTF_REGISTER(csr);
640 RT2X00DEBUGFS_SPRINTF_REGISTER(eeprom);
641 RT2X00DEBUGFS_SPRINTF_REGISTER(bbp);
642 RT2X00DEBUGFS_SPRINTF_REGISTER(rf);
643 RT2X00DEBUGFS_SPRINTF_REGISTER(rfcsr);
644#undef RT2X00DEBUGFS_SPRINTF_REGISTER
645
646 blob->size = strlen(blob->data);
647
648 return debugfs_create_blob(name, S_IRUSR, intf->driver_folder, blob);
649}
650
651void rt2x00debug_register(struct rt2x00_dev *rt2x00dev)
652{
653 const struct rt2x00debug *debug = rt2x00dev->ops->debugfs;
654 struct rt2x00debug_intf *intf;
655
656 intf = kzalloc(sizeof(struct rt2x00debug_intf), GFP_KERNEL);
657 if (!intf) {
658 rt2x00_err(rt2x00dev, "Failed to allocate debug handler\n");
659 return;
660 }
661
662 intf->debug = debug;
663 intf->rt2x00dev = rt2x00dev;
664 rt2x00dev->debugfs_intf = intf;
665
666 intf->driver_folder =
667 debugfs_create_dir(intf->rt2x00dev->ops->name,
668 rt2x00dev->hw->wiphy->debugfsdir);
669 if (IS_ERR(intf->driver_folder) || !intf->driver_folder)
670 goto exit;
671
672 intf->driver_entry =
673 rt2x00debug_create_file_driver("driver", intf, &intf->driver_blob);
674 if (IS_ERR(intf->driver_entry) || !intf->driver_entry)
675 goto exit;
676
677 intf->chipset_entry =
678 rt2x00debug_create_file_chipset("chipset",
679 intf, &intf->chipset_blob);
680 if (IS_ERR(intf->chipset_entry) || !intf->chipset_entry)
681 goto exit;
682
683 intf->dev_flags = debugfs_create_file("dev_flags", S_IRUSR,
684 intf->driver_folder, intf,
685 &rt2x00debug_fop_dev_flags);
686 if (IS_ERR(intf->dev_flags) || !intf->dev_flags)
687 goto exit;
688
689 intf->cap_flags = debugfs_create_file("cap_flags", S_IRUSR,
690 intf->driver_folder, intf,
691 &rt2x00debug_fop_cap_flags);
692 if (IS_ERR(intf->cap_flags) || !intf->cap_flags)
693 goto exit;
694
695 intf->register_folder =
696 debugfs_create_dir("register", intf->driver_folder);
697 if (IS_ERR(intf->register_folder) || !intf->register_folder)
698 goto exit;
699
700#define RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(__intf, __name) \
701({ \
702 if(debug->__name.read) { \
703 (__intf)->__name##_off_entry = \
704 debugfs_create_u32(__stringify(__name) "_offset", \
705 S_IRUSR | S_IWUSR, \
706 (__intf)->register_folder, \
707 &(__intf)->offset_##__name); \
708 if (IS_ERR((__intf)->__name##_off_entry) \
709 || !(__intf)->__name##_off_entry) \
710 goto exit; \
711 \
712 (__intf)->__name##_val_entry = \
713 debugfs_create_file(__stringify(__name) "_value", \
714 S_IRUSR | S_IWUSR, \
715 (__intf)->register_folder, \
716 (__intf), &rt2x00debug_fop_##__name); \
717 if (IS_ERR((__intf)->__name##_val_entry) \
718 || !(__intf)->__name##_val_entry) \
719 goto exit; \
720 } \
721})
722
723 RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, csr);
724 RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, eeprom);
725 RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, bbp);
726 RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, rf);
727 RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, rfcsr);
728
729#undef RT2X00DEBUGFS_CREATE_REGISTER_ENTRY
730
731 intf->queue_folder =
732 debugfs_create_dir("queue", intf->driver_folder);
733 if (IS_ERR(intf->queue_folder) || !intf->queue_folder)
734 goto exit;
735
736 intf->queue_frame_dump_entry =
737 debugfs_create_file("dump", S_IRUSR, intf->queue_folder,
738 intf, &rt2x00debug_fop_queue_dump);
739 if (IS_ERR(intf->queue_frame_dump_entry)
740 || !intf->queue_frame_dump_entry)
741 goto exit;
742
743 skb_queue_head_init(&intf->frame_dump_skbqueue);
744 init_waitqueue_head(&intf->frame_dump_waitqueue);
745
746 intf->queue_stats_entry =
747 debugfs_create_file("queue", S_IRUSR, intf->queue_folder,
748 intf, &rt2x00debug_fop_queue_stats);
749
750#ifdef CONFIG_RT2X00_LIB_CRYPTO
751 if (rt2x00_has_cap_hw_crypto(rt2x00dev))
752 intf->crypto_stats_entry =
753 debugfs_create_file("crypto", S_IRUGO, intf->queue_folder,
754 intf, &rt2x00debug_fop_crypto_stats);
755#endif
756
757 return;
758
759exit:
760 rt2x00debug_deregister(rt2x00dev);
761 rt2x00_err(rt2x00dev, "Failed to register debug handler\n");
762}
763
764void rt2x00debug_deregister(struct rt2x00_dev *rt2x00dev)
765{
766 struct rt2x00debug_intf *intf = rt2x00dev->debugfs_intf;
767
768 if (unlikely(!intf))
769 return;
770
771 skb_queue_purge(&intf->frame_dump_skbqueue);
772
773#ifdef CONFIG_RT2X00_LIB_CRYPTO
774 debugfs_remove(intf->crypto_stats_entry);
775#endif
776 debugfs_remove(intf->queue_stats_entry);
777 debugfs_remove(intf->queue_frame_dump_entry);
778 debugfs_remove(intf->queue_folder);
779 debugfs_remove(intf->rfcsr_val_entry);
780 debugfs_remove(intf->rfcsr_off_entry);
781 debugfs_remove(intf->rf_val_entry);
782 debugfs_remove(intf->rf_off_entry);
783 debugfs_remove(intf->bbp_val_entry);
784 debugfs_remove(intf->bbp_off_entry);
785 debugfs_remove(intf->eeprom_val_entry);
786 debugfs_remove(intf->eeprom_off_entry);
787 debugfs_remove(intf->csr_val_entry);
788 debugfs_remove(intf->csr_off_entry);
789 debugfs_remove(intf->register_folder);
790 debugfs_remove(intf->dev_flags);
791 debugfs_remove(intf->cap_flags);
792 debugfs_remove(intf->chipset_entry);
793 debugfs_remove(intf->driver_entry);
794 debugfs_remove(intf->driver_folder);
795 kfree(intf->chipset_blob.data);
796 kfree(intf->driver_blob.data);
797 kfree(intf);
798
799 rt2x00dev->debugfs_intf = NULL;
800}