2 Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
3 <http://rt2x00.serialmonkey.com>
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.
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.
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.
23 Abstract: rt2x00 debugfs specific routines.
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>
35 #include "rt2x00lib.h"
36 #include "rt2x00dump.h"
38 #define MAX_LINE_LENGTH 64
40 struct rt2x00debug_crypto {
41 unsigned long success;
42 unsigned long icv_error;
43 unsigned long mic_error;
44 unsigned long key_error;
47 struct rt2x00debug_intf {
49 * Pointer to driver structure where
50 * this debugfs entry belongs to.
52 struct rt2x00_dev *rt2x00dev;
55 * Reference to the rt2x00debug structure
56 * which can be used to communicate with
59 const struct rt2x00debug *debug;
62 * Debugfs entries for:
68 * - csr offset/value files
69 * - eeprom offset/value files
70 * - bbp offset/value files
71 * - rf offset/value files
77 struct dentry *driver_folder;
78 struct dentry *driver_entry;
79 struct dentry *chipset_entry;
80 struct dentry *dev_flags;
81 struct dentry *register_folder;
82 struct dentry *csr_off_entry;
83 struct dentry *csr_val_entry;
84 struct dentry *eeprom_off_entry;
85 struct dentry *eeprom_val_entry;
86 struct dentry *bbp_off_entry;
87 struct dentry *bbp_val_entry;
88 struct dentry *rf_off_entry;
89 struct dentry *rf_val_entry;
90 struct dentry *queue_folder;
91 struct dentry *queue_frame_dump_entry;
92 struct dentry *queue_stats_entry;
93 struct dentry *crypto_stats_entry;
96 * The frame dump file only allows a single reader,
97 * so we need to store the current state here.
99 unsigned long frame_dump_flags;
100 #define FRAME_DUMP_FILE_OPEN 1
103 * We queue each frame before dumping it to the user,
104 * per read command we will pass a single skb structure
105 * so we should be prepared to queue multiple sk buffers
106 * before sending it to userspace.
108 struct sk_buff_head frame_dump_skbqueue;
109 wait_queue_head_t frame_dump_waitqueue;
112 * HW crypto statistics.
113 * All statistics are stored separately per cipher type.
115 struct rt2x00debug_crypto crypto_stats[CIPHER_MAX];
118 * Driver and chipset files will use a data buffer
119 * that has been created in advance. This will simplify
120 * the code since we can use the debugfs functions.
122 struct debugfs_blob_wrapper driver_blob;
123 struct debugfs_blob_wrapper chipset_blob;
126 * Requested offset for each register type.
128 unsigned int offset_csr;
129 unsigned int offset_eeprom;
130 unsigned int offset_bbp;
131 unsigned int offset_rf;
134 void rt2x00debug_update_crypto(struct rt2x00_dev *rt2x00dev,
135 struct rxdone_entry_desc *rxdesc)
137 struct rt2x00debug_intf *intf = rt2x00dev->debugfs_intf;
138 enum cipher cipher = rxdesc->cipher;
139 enum rx_crypto status = rxdesc->cipher_status;
141 if (cipher == CIPHER_TKIP_NO_MIC)
142 cipher = CIPHER_TKIP;
143 if (cipher == CIPHER_NONE || cipher >= CIPHER_MAX)
146 /* Remove CIPHER_NONE index */
149 intf->crypto_stats[cipher].success += (status == RX_CRYPTO_SUCCESS);
150 intf->crypto_stats[cipher].icv_error += (status == RX_CRYPTO_FAIL_ICV);
151 intf->crypto_stats[cipher].mic_error += (status == RX_CRYPTO_FAIL_MIC);
152 intf->crypto_stats[cipher].key_error += (status == RX_CRYPTO_FAIL_KEY);
155 void rt2x00debug_dump_frame(struct rt2x00_dev *rt2x00dev,
156 enum rt2x00_dump_type type, struct sk_buff *skb)
158 struct rt2x00debug_intf *intf = rt2x00dev->debugfs_intf;
159 struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb);
160 struct sk_buff *skbcopy;
161 struct rt2x00dump_hdr *dump_hdr;
162 struct timeval timestamp;
165 do_gettimeofday(×tamp);
167 if (!test_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags))
170 if (skb_queue_len(&intf->frame_dump_skbqueue) > 20) {
171 DEBUG(rt2x00dev, "txrx dump queue length exceeded.\n");
176 if (skbdesc->flags & SKBDESC_DESC_IN_SKB)
177 data_len -= skbdesc->desc_len;
179 skbcopy = alloc_skb(sizeof(*dump_hdr) + skbdesc->desc_len + data_len,
182 DEBUG(rt2x00dev, "Failed to copy skb for dump.\n");
186 dump_hdr = (struct rt2x00dump_hdr *)skb_put(skbcopy, sizeof(*dump_hdr));
187 dump_hdr->version = cpu_to_le32(DUMP_HEADER_VERSION);
188 dump_hdr->header_length = cpu_to_le32(sizeof(*dump_hdr));
189 dump_hdr->desc_length = cpu_to_le32(skbdesc->desc_len);
190 dump_hdr->data_length = cpu_to_le32(data_len);
191 dump_hdr->chip_rt = cpu_to_le16(rt2x00dev->chip.rt);
192 dump_hdr->chip_rf = cpu_to_le16(rt2x00dev->chip.rf);
193 dump_hdr->chip_rev = cpu_to_le16(rt2x00dev->chip.rev);
194 dump_hdr->type = cpu_to_le16(type);
195 dump_hdr->queue_index = skbdesc->entry->queue->qid;
196 dump_hdr->entry_index = skbdesc->entry->entry_idx;
197 dump_hdr->timestamp_sec = cpu_to_le32(timestamp.tv_sec);
198 dump_hdr->timestamp_usec = cpu_to_le32(timestamp.tv_usec);
200 if (!(skbdesc->flags & SKBDESC_DESC_IN_SKB))
201 memcpy(skb_put(skbcopy, skbdesc->desc_len), skbdesc->desc,
203 memcpy(skb_put(skbcopy, skb->len), skb->data, skb->len);
205 skb_queue_tail(&intf->frame_dump_skbqueue, skbcopy);
206 wake_up_interruptible(&intf->frame_dump_waitqueue);
209 * Verify that the file has not been closed while we were working.
211 if (!test_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags))
212 skb_queue_purge(&intf->frame_dump_skbqueue);
214 EXPORT_SYMBOL_GPL(rt2x00debug_dump_frame);
216 static int rt2x00debug_file_open(struct inode *inode, struct file *file)
218 struct rt2x00debug_intf *intf = inode->i_private;
220 file->private_data = inode->i_private;
222 if (!try_module_get(intf->debug->owner))
228 static int rt2x00debug_file_release(struct inode *inode, struct file *file)
230 struct rt2x00debug_intf *intf = file->private_data;
232 module_put(intf->debug->owner);
237 static int rt2x00debug_open_queue_dump(struct inode *inode, struct file *file)
239 struct rt2x00debug_intf *intf = inode->i_private;
242 retval = rt2x00debug_file_open(inode, file);
246 if (test_and_set_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags)) {
247 rt2x00debug_file_release(inode, file);
254 static int rt2x00debug_release_queue_dump(struct inode *inode, struct file *file)
256 struct rt2x00debug_intf *intf = inode->i_private;
258 skb_queue_purge(&intf->frame_dump_skbqueue);
260 clear_bit(FRAME_DUMP_FILE_OPEN, &intf->frame_dump_flags);
262 return rt2x00debug_file_release(inode, file);
265 static ssize_t rt2x00debug_read_queue_dump(struct file *file,
270 struct rt2x00debug_intf *intf = file->private_data;
275 if (file->f_flags & O_NONBLOCK)
279 wait_event_interruptible(intf->frame_dump_waitqueue,
281 skb_dequeue(&intf->frame_dump_skbqueue)));
285 status = min((size_t)skb->len, length);
286 if (copy_to_user(buf, skb->data, status)) {
299 static unsigned int rt2x00debug_poll_queue_dump(struct file *file,
302 struct rt2x00debug_intf *intf = file->private_data;
304 poll_wait(file, &intf->frame_dump_waitqueue, wait);
306 if (!skb_queue_empty(&intf->frame_dump_skbqueue))
307 return POLLOUT | POLLWRNORM;
312 static const struct file_operations rt2x00debug_fop_queue_dump = {
313 .owner = THIS_MODULE,
314 .read = rt2x00debug_read_queue_dump,
315 .poll = rt2x00debug_poll_queue_dump,
316 .open = rt2x00debug_open_queue_dump,
317 .release = rt2x00debug_release_queue_dump,
318 .llseek = default_llseek,
321 static ssize_t rt2x00debug_read_queue_stats(struct file *file,
326 struct rt2x00debug_intf *intf = file->private_data;
327 struct data_queue *queue;
328 unsigned long irqflags;
329 unsigned int lines = 1 + intf->rt2x00dev->data_queues;
337 data = kzalloc(lines * MAX_LINE_LENGTH, GFP_KERNEL);
342 sprintf(data, "qid\tcount\tlimit\tlength\tindex\tdone\tcrypto\n");
344 queue_for_each(intf->rt2x00dev, queue) {
345 spin_lock_irqsave(&queue->lock, irqflags);
347 temp += sprintf(temp, "%d\t%d\t%d\t%d\t%d\t%d\t%d\n", queue->qid,
348 queue->count, queue->limit, queue->length,
349 queue->index[Q_INDEX],
350 queue->index[Q_INDEX_DONE],
351 queue->index[Q_INDEX_CRYPTO]);
353 spin_unlock_irqrestore(&queue->lock, irqflags);
357 size = min(size, length);
359 if (copy_to_user(buf, data, size)) {
370 static const struct file_operations rt2x00debug_fop_queue_stats = {
371 .owner = THIS_MODULE,
372 .read = rt2x00debug_read_queue_stats,
373 .open = rt2x00debug_file_open,
374 .release = rt2x00debug_file_release,
375 .llseek = default_llseek,
378 #ifdef CONFIG_RT2X00_LIB_CRYPTO
379 static ssize_t rt2x00debug_read_crypto_stats(struct file *file,
384 struct rt2x00debug_intf *intf = file->private_data;
385 char *name[] = { "WEP64", "WEP128", "TKIP", "AES" };
394 data = kzalloc((1 + CIPHER_MAX) * MAX_LINE_LENGTH, GFP_KERNEL);
399 temp += sprintf(data, "cipher\tsuccess\ticv err\tmic err\tkey err\n");
401 for (i = 0; i < CIPHER_MAX; i++) {
402 temp += sprintf(temp, "%s\t%lu\t%lu\t%lu\t%lu\n", name[i],
403 intf->crypto_stats[i].success,
404 intf->crypto_stats[i].icv_error,
405 intf->crypto_stats[i].mic_error,
406 intf->crypto_stats[i].key_error);
410 size = min(size, length);
412 if (copy_to_user(buf, data, size)) {
423 static const struct file_operations rt2x00debug_fop_crypto_stats = {
424 .owner = THIS_MODULE,
425 .read = rt2x00debug_read_crypto_stats,
426 .open = rt2x00debug_file_open,
427 .release = rt2x00debug_file_release,
428 .llseek = default_llseek,
432 #define RT2X00DEBUGFS_OPS_READ(__name, __format, __type) \
433 static ssize_t rt2x00debug_read_##__name(struct file *file, \
438 struct rt2x00debug_intf *intf = file->private_data; \
439 const struct rt2x00debug *debug = intf->debug; \
442 unsigned int index = intf->offset_##__name; \
448 if (index >= debug->__name.word_count) \
451 index += (debug->__name.word_base / \
452 debug->__name.word_size); \
454 if (debug->__name.flags & RT2X00DEBUGFS_OFFSET) \
455 index *= debug->__name.word_size; \
457 debug->__name.read(intf->rt2x00dev, index, &value); \
459 size = sprintf(line, __format, value); \
461 if (copy_to_user(buf, line, size)) \
468 #define RT2X00DEBUGFS_OPS_WRITE(__name, __type) \
469 static ssize_t rt2x00debug_write_##__name(struct file *file, \
470 const char __user *buf,\
474 struct rt2x00debug_intf *intf = file->private_data; \
475 const struct rt2x00debug *debug = intf->debug; \
478 unsigned int index = intf->offset_##__name; \
484 if (index >= debug->__name.word_count) \
487 if (copy_from_user(line, buf, length)) \
490 size = strlen(line); \
491 value = simple_strtoul(line, NULL, 0); \
493 index += (debug->__name.word_base / \
494 debug->__name.word_size); \
496 if (debug->__name.flags & RT2X00DEBUGFS_OFFSET) \
497 index *= debug->__name.word_size; \
499 debug->__name.write(intf->rt2x00dev, index, value); \
505 #define RT2X00DEBUGFS_OPS(__name, __format, __type) \
506 RT2X00DEBUGFS_OPS_READ(__name, __format, __type); \
507 RT2X00DEBUGFS_OPS_WRITE(__name, __type); \
509 static const struct file_operations rt2x00debug_fop_##__name = {\
510 .owner = THIS_MODULE, \
511 .read = rt2x00debug_read_##__name, \
512 .write = rt2x00debug_write_##__name, \
513 .open = rt2x00debug_file_open, \
514 .release = rt2x00debug_file_release, \
515 .llseek = generic_file_llseek, \
518 RT2X00DEBUGFS_OPS(csr, "0x%.8x\n", u32);
519 RT2X00DEBUGFS_OPS(eeprom, "0x%.4x\n", u16);
520 RT2X00DEBUGFS_OPS(bbp, "0x%.2x\n", u8);
521 RT2X00DEBUGFS_OPS(rf, "0x%.8x\n", u32);
523 static ssize_t rt2x00debug_read_dev_flags(struct file *file,
528 struct rt2x00debug_intf *intf = file->private_data;
535 size = sprintf(line, "0x%.8x\n", (unsigned int)intf->rt2x00dev->flags);
537 if (copy_to_user(buf, line, size))
544 static const struct file_operations rt2x00debug_fop_dev_flags = {
545 .owner = THIS_MODULE,
546 .read = rt2x00debug_read_dev_flags,
547 .open = rt2x00debug_file_open,
548 .release = rt2x00debug_file_release,
549 .llseek = default_llseek,
552 static struct dentry *rt2x00debug_create_file_driver(const char *name,
553 struct rt2x00debug_intf
555 struct debugfs_blob_wrapper
560 data = kzalloc(3 * MAX_LINE_LENGTH, GFP_KERNEL);
565 data += sprintf(data, "driver:\t%s\n", intf->rt2x00dev->ops->name);
566 data += sprintf(data, "version:\t%s\n", DRV_VERSION);
567 data += sprintf(data, "compiled:\t%s %s\n", __DATE__, __TIME__);
568 blob->size = strlen(blob->data);
570 return debugfs_create_blob(name, S_IRUSR, intf->driver_folder, blob);
573 static struct dentry *rt2x00debug_create_file_chipset(const char *name,
574 struct rt2x00debug_intf
580 const struct rt2x00debug *debug = intf->debug;
583 data = kzalloc(8 * MAX_LINE_LENGTH, GFP_KERNEL);
588 data += sprintf(data, "rt chip:\t%04x\n", intf->rt2x00dev->chip.rt);
589 data += sprintf(data, "rf chip:\t%04x\n", intf->rt2x00dev->chip.rf);
590 data += sprintf(data, "revision:\t%04x\n", intf->rt2x00dev->chip.rev);
591 data += sprintf(data, "\n");
592 data += sprintf(data, "register\tbase\twords\twordsize\n");
593 data += sprintf(data, "csr\t%d\t%d\t%d\n",
594 debug->csr.word_base,
595 debug->csr.word_count,
596 debug->csr.word_size);
597 data += sprintf(data, "eeprom\t%d\t%d\t%d\n",
598 debug->eeprom.word_base,
599 debug->eeprom.word_count,
600 debug->eeprom.word_size);
601 data += sprintf(data, "bbp\t%d\t%d\t%d\n",
602 debug->bbp.word_base,
603 debug->bbp.word_count,
604 debug->bbp.word_size);
605 data += sprintf(data, "rf\t%d\t%d\t%d\n",
607 debug->rf.word_count,
608 debug->rf.word_size);
609 blob->size = strlen(blob->data);
611 return debugfs_create_blob(name, S_IRUSR, intf->driver_folder, blob);
614 void rt2x00debug_register(struct rt2x00_dev *rt2x00dev)
616 const struct rt2x00debug *debug = rt2x00dev->ops->debugfs;
617 struct rt2x00debug_intf *intf;
619 intf = kzalloc(sizeof(struct rt2x00debug_intf), GFP_KERNEL);
621 ERROR(rt2x00dev, "Failed to allocate debug handler.\n");
626 intf->rt2x00dev = rt2x00dev;
627 rt2x00dev->debugfs_intf = intf;
629 intf->driver_folder =
630 debugfs_create_dir(intf->rt2x00dev->ops->name,
631 rt2x00dev->hw->wiphy->debugfsdir);
632 if (IS_ERR(intf->driver_folder) || !intf->driver_folder)
636 rt2x00debug_create_file_driver("driver", intf, &intf->driver_blob);
637 if (IS_ERR(intf->driver_entry) || !intf->driver_entry)
640 intf->chipset_entry =
641 rt2x00debug_create_file_chipset("chipset",
642 intf, &intf->chipset_blob);
643 if (IS_ERR(intf->chipset_entry) || !intf->chipset_entry)
646 intf->dev_flags = debugfs_create_file("dev_flags", S_IRUSR,
647 intf->driver_folder, intf,
648 &rt2x00debug_fop_dev_flags);
649 if (IS_ERR(intf->dev_flags) || !intf->dev_flags)
652 intf->register_folder =
653 debugfs_create_dir("register", intf->driver_folder);
654 if (IS_ERR(intf->register_folder) || !intf->register_folder)
657 #define RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(__intf, __name) \
659 (__intf)->__name##_off_entry = \
660 debugfs_create_u32(__stringify(__name) "_offset", \
662 (__intf)->register_folder, \
663 &(__intf)->offset_##__name); \
664 if (IS_ERR((__intf)->__name##_off_entry) \
665 || !(__intf)->__name##_off_entry) \
668 (__intf)->__name##_val_entry = \
669 debugfs_create_file(__stringify(__name) "_value", \
671 (__intf)->register_folder, \
672 (__intf), &rt2x00debug_fop_##__name);\
673 if (IS_ERR((__intf)->__name##_val_entry) \
674 || !(__intf)->__name##_val_entry) \
678 RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, csr);
679 RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, eeprom);
680 RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, bbp);
681 RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(intf, rf);
683 #undef RT2X00DEBUGFS_CREATE_REGISTER_ENTRY
686 debugfs_create_dir("queue", intf->driver_folder);
687 if (IS_ERR(intf->queue_folder) || !intf->queue_folder)
690 intf->queue_frame_dump_entry =
691 debugfs_create_file("dump", S_IRUSR, intf->queue_folder,
692 intf, &rt2x00debug_fop_queue_dump);
693 if (IS_ERR(intf->queue_frame_dump_entry)
694 || !intf->queue_frame_dump_entry)
697 skb_queue_head_init(&intf->frame_dump_skbqueue);
698 init_waitqueue_head(&intf->frame_dump_waitqueue);
700 intf->queue_stats_entry =
701 debugfs_create_file("queue", S_IRUSR, intf->queue_folder,
702 intf, &rt2x00debug_fop_queue_stats);
704 #ifdef CONFIG_RT2X00_LIB_CRYPTO
705 if (test_bit(CONFIG_SUPPORT_HW_CRYPTO, &rt2x00dev->flags))
706 intf->crypto_stats_entry =
707 debugfs_create_file("crypto", S_IRUGO, intf->queue_folder,
708 intf, &rt2x00debug_fop_crypto_stats);
714 rt2x00debug_deregister(rt2x00dev);
715 ERROR(rt2x00dev, "Failed to register debug handler.\n");
718 void rt2x00debug_deregister(struct rt2x00_dev *rt2x00dev)
720 struct rt2x00debug_intf *intf = rt2x00dev->debugfs_intf;
725 skb_queue_purge(&intf->frame_dump_skbqueue);
727 #ifdef CONFIG_RT2X00_LIB_CRYPTO
728 debugfs_remove(intf->crypto_stats_entry);
730 debugfs_remove(intf->queue_stats_entry);
731 debugfs_remove(intf->queue_frame_dump_entry);
732 debugfs_remove(intf->queue_folder);
733 debugfs_remove(intf->rf_val_entry);
734 debugfs_remove(intf->rf_off_entry);
735 debugfs_remove(intf->bbp_val_entry);
736 debugfs_remove(intf->bbp_off_entry);
737 debugfs_remove(intf->eeprom_val_entry);
738 debugfs_remove(intf->eeprom_off_entry);
739 debugfs_remove(intf->csr_val_entry);
740 debugfs_remove(intf->csr_off_entry);
741 debugfs_remove(intf->register_folder);
742 debugfs_remove(intf->dev_flags);
743 debugfs_remove(intf->chipset_entry);
744 debugfs_remove(intf->driver_entry);
745 debugfs_remove(intf->driver_folder);
746 kfree(intf->chipset_blob.data);
747 kfree(intf->driver_blob.data);
750 rt2x00dev->debugfs_intf = NULL;