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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
4 <http://rt2x00.serialmonkey.com>
5
6 */
7
8/*
9 Module: rt2x00lib
10 Abstract: rt2x00 debugfs specific routines.
11 */
12
13#include <linux/debugfs.h>
14#include <linux/kernel.h>
15#include <linux/module.h>
16#include <linux/poll.h>
17#include <linux/sched.h>
18#include <linux/slab.h>
19#include <linux/uaccess.h>
20
21#include "rt2x00.h"
22#include "rt2x00lib.h"
23#include "rt2x00dump.h"
24
25#define MAX_LINE_LENGTH 64
26
27struct rt2x00debug_crypto {
28 unsigned long success;
29 unsigned long icv_error;
30 unsigned long mic_error;
31 unsigned long key_error;
32};
33
34struct rt2x00debug_intf {
35 /*
36 * Pointer to driver structure where
37 * this debugfs entry belongs to.
38 */
39 struct rt2x00_dev *rt2x00dev;
40
41 /*
42 * Reference to the rt2x00debug structure
43 * which can be used to communicate with
44 * the registers.
45 */
46 const struct rt2x00debug *debug;
47
48 /*
49 * Debugfs entries for:
50 * - driver folder
51 * - driver file
52 * - chipset file
53 * - device state flags file
54 * - device capability flags file
55 * - hardware restart file
56 * - register folder
57 * - csr offset/value files
58 * - eeprom offset/value files
59 * - bbp offset/value files
60 * - rf offset/value files
61 * - rfcsr offset/value files
62 * - queue folder
63 * - frame dump file
64 * - queue stats file
65 * - crypto stats file
66 */
67 struct dentry *driver_folder;
68
69 /*
70 * The frame dump file only allows a single reader,
71 * so we need to store the current state here.
72 */
73 unsigned long frame_dump_flags;
74#define FRAME_DUMP_FILE_OPEN 1
75
76 /*
77 * We queue each frame before dumping it to the user,
78 * per read command we will pass a single skb structure
79 * so we should be prepared to queue multiple sk buffers
80 * before sending it to userspace.
81 */
82 struct sk_buff_head frame_dump_skbqueue;
83 wait_queue_head_t frame_dump_waitqueue;
84
85 /*
86 * HW crypto statistics.
87 * All statistics are stored separately per cipher type.
88 */
89 struct rt2x00debug_crypto crypto_stats[CIPHER_MAX];
90
91 /*
92 * Driver and chipset files will use a data buffer
93 * that has been created in advance. This will simplify
94 * the code since we can use the debugfs functions.
95 */
96 struct debugfs_blob_wrapper driver_blob;
97 struct debugfs_blob_wrapper chipset_blob;
98
99 /*
100 * Requested offset for each register type.
101 */
102 unsigned int offset_csr;
103 unsigned int offset_eeprom;
104 unsigned int offset_bbp;
105 unsigned int offset_rf;
106 unsigned int offset_rfcsr;
107};
108
109void rt2x00debug_update_crypto(struct rt2x00_dev *rt2x00dev,
110 struct rxdone_entry_desc *rxdesc)
111{
112 struct rt2x00debug_intf *intf = rt2x00dev->debugfs_intf;
113 enum cipher cipher = rxdesc->cipher;
114 enum rx_crypto status = rxdesc->cipher_status;
115
116 if (cipher == CIPHER_TKIP_NO_MIC)
117 cipher = CIPHER_TKIP;
118 if (cipher == CIPHER_NONE || cipher >= CIPHER_MAX)
119 return;
120
121 /* Remove CIPHER_NONE index */
122 cipher--;
123
124 intf->crypto_stats[cipher].success += (status == RX_CRYPTO_SUCCESS);
125 intf->crypto_stats[cipher].icv_error += (status == RX_CRYPTO_FAIL_ICV);
126 intf->crypto_stats[cipher].mic_error += (status == RX_CRYPTO_FAIL_MIC);
127 intf->crypto_stats[cipher].key_error += (status == RX_CRYPTO_FAIL_KEY);
128}
129
130void rt2x00debug_dump_frame(struct rt2x00_dev *rt2x00dev,
131 enum rt2x00_dump_type type, struct queue_entry *entry)
132{
133 struct rt2x00debug_intf *intf = rt2x00dev->debugfs_intf;
134 struct sk_buff *skb = entry->skb;
135 struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb);
136 struct sk_buff *skbcopy;
137 struct rt2x00dump_hdr *dump_hdr;
138 struct timespec64 timestamp;
139 u32 data_len;
140
141 if (likely(!test_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags)))
142 return;
143
144 ktime_get_ts64(×tamp);
145
146 if (skb_queue_len(&intf->frame_dump_skbqueue) > 20) {
147 rt2x00_dbg(rt2x00dev, "txrx dump queue length exceeded\n");
148 return;
149 }
150
151 data_len = skb->len;
152 if (skbdesc->flags & SKBDESC_DESC_IN_SKB)
153 data_len -= skbdesc->desc_len;
154
155 skbcopy = alloc_skb(sizeof(*dump_hdr) + skbdesc->desc_len + data_len,
156 GFP_ATOMIC);
157 if (!skbcopy) {
158 rt2x00_dbg(rt2x00dev, "Failed to copy skb for dump\n");
159 return;
160 }
161
162 dump_hdr = skb_put(skbcopy, sizeof(*dump_hdr));
163 dump_hdr->version = cpu_to_le32(DUMP_HEADER_VERSION);
164 dump_hdr->header_length = cpu_to_le32(sizeof(*dump_hdr));
165 dump_hdr->desc_length = cpu_to_le32(skbdesc->desc_len);
166 dump_hdr->data_length = cpu_to_le32(data_len);
167 dump_hdr->chip_rt = cpu_to_le16(rt2x00dev->chip.rt);
168 dump_hdr->chip_rf = cpu_to_le16(rt2x00dev->chip.rf);
169 dump_hdr->chip_rev = cpu_to_le16(rt2x00dev->chip.rev);
170 dump_hdr->type = cpu_to_le16(type);
171 dump_hdr->queue_index = entry->queue->qid;
172 dump_hdr->entry_index = entry->entry_idx;
173 dump_hdr->timestamp_sec = cpu_to_le32(timestamp.tv_sec);
174 dump_hdr->timestamp_usec = cpu_to_le32(timestamp.tv_nsec /
175 NSEC_PER_USEC);
176
177 if (!(skbdesc->flags & SKBDESC_DESC_IN_SKB))
178 skb_put_data(skbcopy, skbdesc->desc, skbdesc->desc_len);
179 skb_put_data(skbcopy, skb->data, skb->len);
180
181 skb_queue_tail(&intf->frame_dump_skbqueue, skbcopy);
182 wake_up_interruptible(&intf->frame_dump_waitqueue);
183
184 /*
185 * Verify that the file has not been closed while we were working.
186 */
187 if (!test_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags))
188 skb_queue_purge(&intf->frame_dump_skbqueue);
189}
190EXPORT_SYMBOL_GPL(rt2x00debug_dump_frame);
191
192static int rt2x00debug_file_open(struct inode *inode, struct file *file)
193{
194 struct rt2x00debug_intf *intf = inode->i_private;
195
196 file->private_data = inode->i_private;
197
198 if (!try_module_get(intf->debug->owner))
199 return -EBUSY;
200
201 return 0;
202}
203
204static int rt2x00debug_file_release(struct inode *inode, struct file *file)
205{
206 struct rt2x00debug_intf *intf = file->private_data;
207
208 module_put(intf->debug->owner);
209
210 return 0;
211}
212
213static int rt2x00debug_open_queue_dump(struct inode *inode, struct file *file)
214{
215 struct rt2x00debug_intf *intf = inode->i_private;
216 int retval;
217
218 retval = rt2x00debug_file_open(inode, file);
219 if (retval)
220 return retval;
221
222 if (test_and_set_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags)) {
223 rt2x00debug_file_release(inode, file);
224 return -EBUSY;
225 }
226
227 return 0;
228}
229
230static int rt2x00debug_release_queue_dump(struct inode *inode, struct file *file)
231{
232 struct rt2x00debug_intf *intf = inode->i_private;
233
234 skb_queue_purge(&intf->frame_dump_skbqueue);
235
236 clear_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags);
237
238 return rt2x00debug_file_release(inode, file);
239}
240
241static ssize_t rt2x00debug_read_queue_dump(struct file *file,
242 char __user *buf,
243 size_t length,
244 loff_t *offset)
245{
246 struct rt2x00debug_intf *intf = file->private_data;
247 struct sk_buff *skb;
248 size_t status;
249 int retval;
250
251 if (file->f_flags & O_NONBLOCK)
252 return -EAGAIN;
253
254 retval =
255 wait_event_interruptible(intf->frame_dump_waitqueue,
256 (skb =
257 skb_dequeue(&intf->frame_dump_skbqueue)));
258 if (retval)
259 return retval;
260
261 status = min_t(size_t, skb->len, length);
262 if (copy_to_user(buf, skb->data, status)) {
263 status = -EFAULT;
264 goto exit;
265 }
266
267 *offset += status;
268
269exit:
270 kfree_skb(skb);
271
272 return status;
273}
274
275static __poll_t rt2x00debug_poll_queue_dump(struct file *file,
276 poll_table *wait)
277{
278 struct rt2x00debug_intf *intf = file->private_data;
279
280 poll_wait(file, &intf->frame_dump_waitqueue, wait);
281
282 if (!skb_queue_empty(&intf->frame_dump_skbqueue))
283 return EPOLLOUT | EPOLLWRNORM;
284
285 return 0;
286}
287
288static const struct file_operations rt2x00debug_fop_queue_dump = {
289 .owner = THIS_MODULE,
290 .read = rt2x00debug_read_queue_dump,
291 .poll = rt2x00debug_poll_queue_dump,
292 .open = rt2x00debug_open_queue_dump,
293 .release = rt2x00debug_release_queue_dump,
294 .llseek = default_llseek,
295};
296
297static ssize_t rt2x00debug_read_queue_stats(struct file *file,
298 char __user *buf,
299 size_t length,
300 loff_t *offset)
301{
302 struct rt2x00debug_intf *intf = file->private_data;
303 struct data_queue *queue;
304 unsigned long irqflags;
305 unsigned int lines = 1 + intf->rt2x00dev->data_queues;
306 size_t size;
307 char *data;
308 char *temp;
309
310 if (*offset)
311 return 0;
312
313 data = kcalloc(lines, MAX_LINE_LENGTH, GFP_KERNEL);
314 if (!data)
315 return -ENOMEM;
316
317 temp = data +
318 sprintf(data, "qid\tflags\t\tcount\tlimit\tlength\tindex\tdma done\tdone\n");
319
320 queue_for_each(intf->rt2x00dev, queue) {
321 spin_lock_irqsave(&queue->index_lock, irqflags);
322
323 temp += sprintf(temp, "%d\t0x%.8x\t%d\t%d\t%d\t%d\t%d\t\t%d\n",
324 queue->qid, (unsigned int)queue->flags,
325 queue->count, queue->limit, queue->length,
326 queue->index[Q_INDEX],
327 queue->index[Q_INDEX_DMA_DONE],
328 queue->index[Q_INDEX_DONE]);
329
330 spin_unlock_irqrestore(&queue->index_lock, irqflags);
331 }
332
333 size = strlen(data);
334 size = min(size, length);
335
336 if (copy_to_user(buf, data, size)) {
337 kfree(data);
338 return -EFAULT;
339 }
340
341 kfree(data);
342
343 *offset += size;
344 return size;
345}
346
347static const struct file_operations rt2x00debug_fop_queue_stats = {
348 .owner = THIS_MODULE,
349 .read = rt2x00debug_read_queue_stats,
350 .open = rt2x00debug_file_open,
351 .release = rt2x00debug_file_release,
352 .llseek = default_llseek,
353};
354
355#ifdef CONFIG_RT2X00_LIB_CRYPTO
356static ssize_t rt2x00debug_read_crypto_stats(struct file *file,
357 char __user *buf,
358 size_t length,
359 loff_t *offset)
360{
361 struct rt2x00debug_intf *intf = file->private_data;
362 static const char * const name[] = { "WEP64", "WEP128", "TKIP", "AES" };
363 char *data;
364 char *temp;
365 size_t size;
366 unsigned int i;
367
368 if (*offset)
369 return 0;
370
371 data = kcalloc(1 + CIPHER_MAX, MAX_LINE_LENGTH, GFP_KERNEL);
372 if (!data)
373 return -ENOMEM;
374
375 temp = data;
376 temp += sprintf(data, "cipher\tsuccess\ticv err\tmic err\tkey err\n");
377
378 for (i = 0; i < CIPHER_MAX; i++) {
379 temp += sprintf(temp, "%s\t%lu\t%lu\t%lu\t%lu\n", name[i],
380 intf->crypto_stats[i].success,
381 intf->crypto_stats[i].icv_error,
382 intf->crypto_stats[i].mic_error,
383 intf->crypto_stats[i].key_error);
384 }
385
386 size = strlen(data);
387 size = min(size, length);
388
389 if (copy_to_user(buf, data, size)) {
390 kfree(data);
391 return -EFAULT;
392 }
393
394 kfree(data);
395
396 *offset += size;
397 return size;
398}
399
400static const struct file_operations rt2x00debug_fop_crypto_stats = {
401 .owner = THIS_MODULE,
402 .read = rt2x00debug_read_crypto_stats,
403 .open = rt2x00debug_file_open,
404 .release = rt2x00debug_file_release,
405 .llseek = default_llseek,
406};
407#endif
408
409#define RT2X00DEBUGFS_OPS_READ(__name, __format, __type) \
410static ssize_t rt2x00debug_read_##__name(struct file *file, \
411 char __user *buf, \
412 size_t length, \
413 loff_t *offset) \
414{ \
415 struct rt2x00debug_intf *intf = file->private_data; \
416 const struct rt2x00debug *debug = intf->debug; \
417 char line[16]; \
418 size_t size; \
419 unsigned int index = intf->offset_##__name; \
420 __type value; \
421 \
422 if (*offset) \
423 return 0; \
424 \
425 if (index >= debug->__name.word_count) \
426 return -EINVAL; \
427 \
428 index += (debug->__name.word_base / \
429 debug->__name.word_size); \
430 \
431 if (debug->__name.flags & RT2X00DEBUGFS_OFFSET) \
432 index *= debug->__name.word_size; \
433 \
434 value = debug->__name.read(intf->rt2x00dev, index); \
435 \
436 size = sprintf(line, __format, value); \
437 \
438 return simple_read_from_buffer(buf, length, offset, line, size); \
439}
440
441#define RT2X00DEBUGFS_OPS_WRITE(__name, __type) \
442static ssize_t rt2x00debug_write_##__name(struct file *file, \
443 const char __user *buf,\
444 size_t length, \
445 loff_t *offset) \
446{ \
447 struct rt2x00debug_intf *intf = file->private_data; \
448 const struct rt2x00debug *debug = intf->debug; \
449 char line[17]; \
450 size_t size; \
451 unsigned int index = intf->offset_##__name; \
452 __type value; \
453 \
454 if (*offset) \
455 return 0; \
456 \
457 if (index >= debug->__name.word_count) \
458 return -EINVAL; \
459 \
460 if (length > sizeof(line)) \
461 return -EINVAL; \
462 \
463 if (copy_from_user(line, buf, length)) \
464 return -EFAULT; \
465 line[16] = 0; \
466 \
467 size = strlen(line); \
468 value = simple_strtoul(line, NULL, 0); \
469 \
470 index += (debug->__name.word_base / \
471 debug->__name.word_size); \
472 \
473 if (debug->__name.flags & RT2X00DEBUGFS_OFFSET) \
474 index *= debug->__name.word_size; \
475 \
476 debug->__name.write(intf->rt2x00dev, index, value); \
477 \
478 *offset += size; \
479 return size; \
480}
481
482#define RT2X00DEBUGFS_OPS(__name, __format, __type) \
483RT2X00DEBUGFS_OPS_READ(__name, __format, __type); \
484RT2X00DEBUGFS_OPS_WRITE(__name, __type); \
485 \
486static const struct file_operations rt2x00debug_fop_##__name = {\
487 .owner = THIS_MODULE, \
488 .read = rt2x00debug_read_##__name, \
489 .write = rt2x00debug_write_##__name, \
490 .open = rt2x00debug_file_open, \
491 .release = rt2x00debug_file_release, \
492 .llseek = generic_file_llseek, \
493};
494
495RT2X00DEBUGFS_OPS(csr, "0x%.8x\n", u32);
496RT2X00DEBUGFS_OPS(eeprom, "0x%.4x\n", u16);
497RT2X00DEBUGFS_OPS(bbp, "0x%.2x\n", u8);
498RT2X00DEBUGFS_OPS(rf, "0x%.8x\n", u32);
499RT2X00DEBUGFS_OPS(rfcsr, "0x%.2x\n", u8);
500
501static ssize_t rt2x00debug_read_dev_flags(struct file *file,
502 char __user *buf,
503 size_t length,
504 loff_t *offset)
505{
506 struct rt2x00debug_intf *intf = file->private_data;
507 char line[16];
508 size_t size;
509
510 if (*offset)
511 return 0;
512
513 size = sprintf(line, "0x%.8x\n", (unsigned int)intf->rt2x00dev->flags);
514
515 return simple_read_from_buffer(buf, length, offset, line, size);
516}
517
518static const struct file_operations rt2x00debug_fop_dev_flags = {
519 .owner = THIS_MODULE,
520 .read = rt2x00debug_read_dev_flags,
521 .open = rt2x00debug_file_open,
522 .release = rt2x00debug_file_release,
523 .llseek = default_llseek,
524};
525
526static ssize_t rt2x00debug_read_cap_flags(struct file *file,
527 char __user *buf,
528 size_t length,
529 loff_t *offset)
530{
531 struct rt2x00debug_intf *intf = file->private_data;
532 char line[16];
533 size_t size;
534
535 if (*offset)
536 return 0;
537
538 size = sprintf(line, "0x%.8x\n", (unsigned int)intf->rt2x00dev->cap_flags);
539
540 return simple_read_from_buffer(buf, length, offset, line, size);
541}
542
543static const struct file_operations rt2x00debug_fop_cap_flags = {
544 .owner = THIS_MODULE,
545 .read = rt2x00debug_read_cap_flags,
546 .open = rt2x00debug_file_open,
547 .release = rt2x00debug_file_release,
548 .llseek = default_llseek,
549};
550
551static ssize_t rt2x00debug_write_restart_hw(struct file *file,
552 const char __user *buf,
553 size_t length,
554 loff_t *offset)
555{
556 struct rt2x00debug_intf *intf = file->private_data;
557 struct rt2x00_dev *rt2x00dev = intf->rt2x00dev;
558 static unsigned long last_reset = INITIAL_JIFFIES;
559
560 if (!rt2x00_has_cap_restart_hw(rt2x00dev))
561 return -EOPNOTSUPP;
562
563 if (time_before(jiffies, last_reset + msecs_to_jiffies(2000)))
564 return -EBUSY;
565
566 last_reset = jiffies;
567
568 ieee80211_restart_hw(rt2x00dev->hw);
569 return length;
570}
571
572static const struct file_operations rt2x00debug_restart_hw = {
573 .owner = THIS_MODULE,
574 .write = rt2x00debug_write_restart_hw,
575 .open = simple_open,
576 .llseek = generic_file_llseek,
577};
578
579static void rt2x00debug_create_file_driver(const char *name,
580 struct rt2x00debug_intf *intf,
581 struct debugfs_blob_wrapper *blob)
582{
583 char *data;
584
585 data = kzalloc(3 * MAX_LINE_LENGTH, GFP_KERNEL);
586 if (!data)
587 return;
588
589 blob->data = data;
590 data += sprintf(data, "driver:\t%s\n", intf->rt2x00dev->ops->name);
591 data += sprintf(data, "version:\t%s\n", DRV_VERSION);
592 blob->size = strlen(blob->data);
593
594 debugfs_create_blob(name, 0400, intf->driver_folder, blob);
595}
596
597static void rt2x00debug_create_file_chipset(const char *name,
598 struct rt2x00debug_intf *intf,
599 struct debugfs_blob_wrapper *blob)
600{
601 const struct rt2x00debug *debug = intf->debug;
602 char *data;
603
604 data = kzalloc(9 * MAX_LINE_LENGTH, GFP_KERNEL);
605 if (!data)
606 return;
607
608 blob->data = data;
609 data += sprintf(data, "rt chip:\t%04x\n", intf->rt2x00dev->chip.rt);
610 data += sprintf(data, "rf chip:\t%04x\n", intf->rt2x00dev->chip.rf);
611 data += sprintf(data, "revision:\t%04x\n", intf->rt2x00dev->chip.rev);
612 data += sprintf(data, "\n");
613 data += sprintf(data, "register\tbase\twords\twordsize\n");
614#define RT2X00DEBUGFS_SPRINTF_REGISTER(__name) \
615{ \
616 if (debug->__name.read) \
617 data += sprintf(data, __stringify(__name) \
618 "\t%d\t%d\t%d\n", \
619 debug->__name.word_base, \
620 debug->__name.word_count, \
621 debug->__name.word_size); \
622}
623 RT2X00DEBUGFS_SPRINTF_REGISTER(csr);
624 RT2X00DEBUGFS_SPRINTF_REGISTER(eeprom);
625 RT2X00DEBUGFS_SPRINTF_REGISTER(bbp);
626 RT2X00DEBUGFS_SPRINTF_REGISTER(rf);
627 RT2X00DEBUGFS_SPRINTF_REGISTER(rfcsr);
628#undef RT2X00DEBUGFS_SPRINTF_REGISTER
629
630 blob->size = strlen(blob->data);
631
632 debugfs_create_blob(name, 0400, intf->driver_folder, blob);
633}
634
635void rt2x00debug_register(struct rt2x00_dev *rt2x00dev)
636{
637 const struct rt2x00debug *debug = rt2x00dev->ops->debugfs;
638 struct rt2x00debug_intf *intf;
639 struct dentry *queue_folder;
640 struct dentry *register_folder;
641
642 intf = kzalloc(sizeof(struct rt2x00debug_intf), GFP_KERNEL);
643 if (!intf) {
644 rt2x00_err(rt2x00dev, "Failed to allocate debug handler\n");
645 return;
646 }
647
648 intf->debug = debug;
649 intf->rt2x00dev = rt2x00dev;
650 rt2x00dev->debugfs_intf = intf;
651
652 intf->driver_folder =
653 debugfs_create_dir(intf->rt2x00dev->ops->name,
654 rt2x00dev->hw->wiphy->debugfsdir);
655
656 rt2x00debug_create_file_driver("driver", intf, &intf->driver_blob);
657 rt2x00debug_create_file_chipset("chipset", intf, &intf->chipset_blob);
658 debugfs_create_file("dev_flags", 0400, intf->driver_folder, intf,
659 &rt2x00debug_fop_dev_flags);
660 debugfs_create_file("cap_flags", 0400, intf->driver_folder, intf,
661 &rt2x00debug_fop_cap_flags);
662 debugfs_create_file("restart_hw", 0200, intf->driver_folder, intf,
663 &rt2x00debug_restart_hw);
664
665 register_folder = debugfs_create_dir("register", intf->driver_folder);
666
667#define RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(__intf, __name) \
668({ \
669 if (debug->__name.read) { \
670 debugfs_create_u32(__stringify(__name) "_offset", 0600, \
671 register_folder, \
672 &(__intf)->offset_##__name); \
673 \
674 debugfs_create_file(__stringify(__name) "_value", 0600, \
675 register_folder, (__intf), \
676 &rt2x00debug_fop_##__name); \
677 } \
678})
679
680 RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, csr);
681 RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, eeprom);
682 RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, bbp);
683 RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, rf);
684 RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, rfcsr);
685
686#undef RT2X00DEBUGFS_CREATE_REGISTER_ENTRY
687
688 queue_folder = debugfs_create_dir("queue", intf->driver_folder);
689
690 debugfs_create_file("dump", 0400, queue_folder, intf,
691 &rt2x00debug_fop_queue_dump);
692
693 skb_queue_head_init(&intf->frame_dump_skbqueue);
694 init_waitqueue_head(&intf->frame_dump_waitqueue);
695
696 debugfs_create_file("queue", 0400, queue_folder, intf,
697 &rt2x00debug_fop_queue_stats);
698
699#ifdef CONFIG_RT2X00_LIB_CRYPTO
700 if (rt2x00_has_cap_hw_crypto(rt2x00dev))
701 debugfs_create_file("crypto", 0444, queue_folder, intf,
702 &rt2x00debug_fop_crypto_stats);
703#endif
704
705 return;
706}
707
708void rt2x00debug_deregister(struct rt2x00_dev *rt2x00dev)
709{
710 struct rt2x00debug_intf *intf = rt2x00dev->debugfs_intf;
711
712 if (unlikely(!intf))
713 return;
714
715 skb_queue_purge(&intf->frame_dump_skbqueue);
716
717 debugfs_remove_recursive(intf->driver_folder);
718 kfree(intf->chipset_blob.data);
719 kfree(intf->driver_blob.data);
720 kfree(intf);
721
722 rt2x00dev->debugfs_intf = NULL;
723}
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 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(×tamp);
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}
219EXPORT_SYMBOL_GPL(rt2x00debug_dump_frame);
220
221static 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
233static 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
242static 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
259static 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
270static 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
298exit:
299 kfree_skb(skb);
300
301 return status;
302}
303
304static __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
317static 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
326static 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
376static 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
385static 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 = kzalloc((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
429static 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) \
439static 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) \
475static 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) \
516RT2X00DEBUGFS_OPS_READ(__name, __format, __type); \
517RT2X00DEBUGFS_OPS_WRITE(__name, __type); \
518 \
519static 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
528RT2X00DEBUGFS_OPS(csr, "0x%.8x\n", u32);
529RT2X00DEBUGFS_OPS(eeprom, "0x%.4x\n", u16);
530RT2X00DEBUGFS_OPS(bbp, "0x%.2x\n", u8);
531RT2X00DEBUGFS_OPS(rf, "0x%.8x\n", u32);
532RT2X00DEBUGFS_OPS(rfcsr, "0x%.2x\n", u8);
533
534static 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
555static 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
563static 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
584static 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
592static 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
612static 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
653void 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
763exit:
764 rt2x00debug_deregister(rt2x00dev);
765 rt2x00_err(rt2x00dev, "Failed to register debug handler\n");
766}
767
768void 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}