1 /*
2 	Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
3 	<http://rt2x00.serialmonkey.com>
4 
5 	This program is free software; you can redistribute it and/or modify
6 	it under the terms of the GNU General Public License as published by
7 	the Free Software Foundation; either version 2 of the License, or
8 	(at your option) any later version.
9 
10 	This program is distributed in the hope that it will be useful,
11 	but WITHOUT ANY WARRANTY; without even the implied warranty of
12 	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 	GNU General Public License for more details.
14 
15 	You should have received a copy of the GNU General Public License
16 	along with this program; if not, write to the
17 	Free Software Foundation, Inc.,
18 	59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19  */
20 
21 /*
22 	Module: rt2x00lib
23 	Abstract: rt2x00 debugfs specific routines.
24  */
25 
26 #include <linux/debugfs.h>
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/poll.h>
30 #include <linux/sched.h>
31 #include <linux/slab.h>
32 #include <linux/uaccess.h>
33 
34 #include "rt2x00.h"
35 #include "rt2x00lib.h"
36 #include "rt2x00dump.h"
37 
38 #define MAX_LINE_LENGTH 64
39 
40 struct rt2x00debug_crypto {
41 	unsigned long success;
42 	unsigned long icv_error;
43 	unsigned long mic_error;
44 	unsigned long key_error;
45 };
46 
47 struct rt2x00debug_intf {
48 	/*
49 	 * Pointer to driver structure where
50 	 * this debugfs entry belongs to.
51 	 */
52 	struct rt2x00_dev *rt2x00dev;
53 
54 	/*
55 	 * Reference to the rt2x00debug structure
56 	 * which can be used to communicate with
57 	 * the registers.
58 	 */
59 	const struct rt2x00debug *debug;
60 
61 	/*
62 	 * Debugfs entries for:
63 	 * - driver folder
64 	 *   - driver file
65 	 *   - chipset file
66 	 *   - device state flags file
67 	 *   - device capability flags file
68 	 *   - register folder
69 	 *     - csr offset/value files
70 	 *     - eeprom offset/value files
71 	 *     - bbp offset/value files
72 	 *     - rf offset/value files
73 	 *   - 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 
rt2x00debug_update_crypto(struct rt2x00_dev * rt2x00dev,struct rxdone_entry_desc * rxdesc)136 void 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 
rt2x00debug_dump_frame(struct rt2x00_dev * rt2x00dev,enum rt2x00_dump_type type,struct sk_buff * skb)157 void 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(&timestamp);
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 }
216 EXPORT_SYMBOL_GPL(rt2x00debug_dump_frame);
217 
rt2x00debug_file_open(struct inode * inode,struct file * file)218 static 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 
rt2x00debug_file_release(struct inode * inode,struct file * file)230 static 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 
rt2x00debug_open_queue_dump(struct inode * inode,struct file * file)239 static 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 
rt2x00debug_release_queue_dump(struct inode * inode,struct file * file)256 static 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 
rt2x00debug_read_queue_dump(struct file * file,char __user * buf,size_t length,loff_t * offset)267 static 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 
295 exit:
296 	kfree_skb(skb);
297 
298 	return status;
299 }
300 
rt2x00debug_poll_queue_dump(struct file * file,poll_table * wait)301 static 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 
314 static 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 
rt2x00debug_read_queue_stats(struct file * file,char __user * buf,size_t length,loff_t * offset)323 static 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 
373 static 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
rt2x00debug_read_crypto_stats(struct file * file,char __user * buf,size_t length,loff_t * offset)382 static 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 
426 static 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)	\
436 static 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)			\
472 static 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)		\
512 RT2X00DEBUGFS_OPS_READ(__name, __format, __type);		\
513 RT2X00DEBUGFS_OPS_WRITE(__name, __type);			\
514 								\
515 static 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 
524 RT2X00DEBUGFS_OPS(csr, "0x%.8x\n", u32);
525 RT2X00DEBUGFS_OPS(eeprom, "0x%.4x\n", u16);
526 RT2X00DEBUGFS_OPS(bbp, "0x%.2x\n", u8);
527 RT2X00DEBUGFS_OPS(rf, "0x%.8x\n", u32);
528 
rt2x00debug_read_dev_flags(struct file * file,char __user * buf,size_t length,loff_t * offset)529 static 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 
550 static 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 
rt2x00debug_read_cap_flags(struct file * file,char __user * buf,size_t length,loff_t * offset)558 static 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 
579 static 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 
rt2x00debug_create_file_driver(const char * name,struct rt2x00debug_intf * intf,struct debugfs_blob_wrapper * blob)587 static 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 
rt2x00debug_create_file_chipset(const char * name,struct rt2x00debug_intf * intf,struct debugfs_blob_wrapper * blob)607 static 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 
rt2x00debug_register(struct rt2x00_dev * rt2x00dev)648 void 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 
753 exit:
754 	rt2x00debug_deregister(rt2x00dev);
755 	ERROR(rt2x00dev, "Failed to register debug handler.\n");
756 }
757 
rt2x00debug_deregister(struct rt2x00_dev * rt2x00dev)758 void 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 }
793