aboutsummaryrefslogtreecommitdiff
path: root/drivers/net/wireless/bcm43xx/bcm43xx_debugfs.c
blob: b9df06a06ea96105f3a033c3a54377229ee6c66e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
/*

  Broadcom BCM43xx wireless driver

  debugfs driver debugging code

  Copyright (c) 2005 Michael Buesch <mbuesch@freenet.de>

  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2 of the License, or
  (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program; see the file COPYING.  If not, write to
  the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
  Boston, MA 02110-1301, USA.

*/



#include <linux/fs.h>
#include <linux/debugfs.h>
#include <linux/slab.h>
#include <linux/netdevice.h>
#include <linux/pci.h>
#include <asm/io.h>

#include "bcm43xx.h"
#include "bcm43xx_main.h"
#include "bcm43xx_debugfs.h"
#include "bcm43xx_dma.h"
#include "bcm43xx_pio.h"
#include "bcm43xx_xmit.h"

#define REALLY_BIG_BUFFER_SIZE	(1024*256)

static struct bcm43xx_debugfs fs;
static char really_big_buffer[REALLY_BIG_BUFFER_SIZE];
static DECLARE_MUTEX(big_buffer_sem);


static ssize_t write_file_dummy(struct file *file, const char __user *buf,
				size_t count, loff_t *ppos)
{
	return count;
}

static int open_file_generic(struct inode *inode, struct file *file)
{
	file->private_data = inode->i_private;
	return 0;
}

#define fappend(fmt, x...)	pos += snprintf(buf + pos, len - pos, fmt , ##x)

static ssize_t devinfo_read_file(struct file *file, char __user *userbuf,
				 size_t count, loff_t *ppos)
{
	const size_t len = REALLY_BIG_BUFFER_SIZE;

	struct bcm43xx_private *bcm = file->private_data;
	char *buf = really_big_buffer;
	size_t pos = 0;
	ssize_t res;
	struct net_device *net_dev;
	struct pci_dev *pci_dev;
	unsigned long flags;
	u16 tmp16;
	int i;

	down(&big_buffer_sem);

	mutex_lock(&bcm->mutex);
	spin_lock_irqsave(&bcm->irq_lock, flags);
	if (bcm43xx_status(bcm) != BCM43xx_STAT_INITIALIZED) {
		fappend("Board not initialized.\n");
		goto out;
	}
	net_dev = bcm->net_dev;
	pci_dev = bcm->pci_dev;

	/* This is where the information is written to the "devinfo" file */
	fappend("*** %s devinfo ***\n", net_dev->name);
	fappend("vendor:           0x%04x   device:           0x%04x\n",
		pci_dev->vendor, pci_dev->device);
	fappend("subsystem_vendor: 0x%04x   subsystem_device: 0x%04x\n",
		pci_dev->subsystem_vendor, pci_dev->subsystem_device);
	fappend("IRQ: %d\n", bcm->irq);
	fappend("mmio_addr: 0x%p\n", bcm->mmio_addr);
	fappend("chip_id: 0x%04x   chip_rev: 0x%02x\n", bcm->chip_id, bcm->chip_rev);
	if ((bcm->core_80211[0].rev >= 3) && (bcm43xx_read32(bcm, 0x0158) & (1 << 16)))
		fappend("Radio disabled by hardware!\n");
	if ((bcm->core_80211[0].rev < 3) && !(bcm43xx_read16(bcm, 0x049A) & (1 << 4)))
		fappend("Radio disabled by hardware!\n");
	fappend("board_vendor: 0x%04x   board_type: 0x%04x\n", bcm->board_vendor,
	        bcm->board_type);

	fappend("\nCores:\n");
#define fappend_core(name, info) fappend("core \"" name "\" %s, %s, id: 0x%04x, "	\
					 "rev: 0x%02x, index: 0x%02x\n",		\
					 (info).available				\
						? "available" : "nonavailable",		\
					 (info).enabled					\
						? "enabled" : "disabled",		\
					 (info).id, (info).rev, (info).index)
	fappend_core("CHIPCOMMON", bcm->core_chipcommon);
	fappend_core("PCI", bcm->core_pci);
	fappend_core("first 80211", bcm->core_80211[0]);
	fappend_core("second 80211", bcm->core_80211[1]);
#undef fappend_core
	tmp16 = bcm43xx_read16(bcm, BCM43xx_MMIO_GPIO_CONTROL);
	fappend("LEDs: ");
	for (i = 0; i < BCM43xx_NR_LEDS; i++)
		fappend("%d ", !!(tmp16 & (1 << i)));
	fappend("\n");

out:
	spin_unlock_irqrestore(&bcm->irq_lock, flags);
	mutex_unlock(&bcm->mutex);
	res = simple_read_from_buffer(userbuf, count, ppos, buf, pos);
	up(&big_buffer_sem);
	return res;
}

static ssize_t drvinfo_read_file(struct file *file, char __user *userbuf,
				 size_t count, loff_t *ppos)
{
	const size_t len = REALLY_BIG_BUFFER_SIZE;

	char *buf = really_big_buffer;
	size_t pos = 0;
	ssize_t res;

	down(&big_buffer_sem);

	/* This is where the information is written to the "driver" file */
	fappend(KBUILD_MODNAME " driver\n");
	fappend("Compiled at: %s %s\n", __DATE__, __TIME__);

	res = simple_read_from_buffer(userbuf, count, ppos, buf, pos);
	up(&big_buffer_sem);
	return res;
}

static ssize_t spromdump_read_file(struct file *file, char __user *userbuf,
				 size_t count, loff_t *ppos)
{
	const size_t len = REALLY_BIG_BUFFER_SIZE;

	struct bcm43xx_private *bcm = file->private_data;
	char *buf = really_big_buffer;
	size_t pos = 0;
	ssize_t res;
	unsigned long flags;

	down(&big_buffer_sem);
	mutex_lock(&bcm->mutex);
	spin_lock_irqsave(&bcm->irq_lock, flags);
	if (bcm43xx_status(bcm) != BCM43xx_STAT_INITIALIZED) {
		fappend("Board not initialized.\n");
		goto out;
	}

	/* This is where the information is written to the "sprom_dump" file */
	fappend("boardflags: 0x%04x\n", bcm->sprom.boardflags);

out:
	spin_unlock_irqrestore(&bcm->irq_lock, flags);
	mutex_unlock(&bcm->mutex);
	res = simple_read_from_buffer(userbuf, count, ppos, buf, pos);
	up(&big_buffer_sem);
	return res;
}

static ssize_t tsf_read_file(struct file *file, char __user *userbuf,
			     size_t count, loff_t *ppos)
{
	const size_t len = REALLY_BIG_BUFFER_SIZE;

	struct bcm43xx_private *bcm = file->private_data;
	char *buf = really_big_buffer;
	size_t pos = 0;
	ssize_t res;
	unsigned long flags;
	u64 tsf;

	down(&big_buffer_sem);
	mutex_lock(&bcm->mutex);
	spin_lock_irqsave(&bcm->irq_lock, flags);
	if (bcm43xx_status(bcm) != BCM43xx_STAT_INITIALIZED) {
		fappend("Board not initialized.\n");
		goto out;
	}
	bcm43xx_tsf_read(bcm, &tsf);
	fappend("0x%08x%08x\n",
		(unsigned int)((tsf & 0xFFFFFFFF00000000ULL) >> 32),
		(unsigned int)(tsf & 0xFFFFFFFFULL));

out:
	spin_unlock_irqrestore(&bcm->irq_lock, flags);
	mutex_unlock(&bcm->mutex);
	res = simple_read_from_buffer(userbuf, count, ppos, buf, pos);
	up(&big_buffer_sem);
	return res;
}

static ssize_t tsf_write_file(struct file *file, const char __user *user_buf,
			      size_t count, loff_t *ppos)
{
	struct bcm43xx_private *bcm = file->private_data;
	char *buf = really_big_buffer;
	ssize_t buf_size;
	ssize_t res;
	unsigned long flags;
	u64 tsf;

	buf_size = min(count, sizeof (really_big_buffer) - 1);
	down(&big_buffer_sem);
	if (copy_from_user(buf, user_buf, buf_size)) {
	        res = -EFAULT;
		goto out_up;
	}
	mutex_lock(&bcm->mutex);
	spin_lock_irqsave(&bcm->irq_lock, flags);
	if (bcm43xx_status(bcm) != BCM43xx_STAT_INITIALIZED) {
		printk(KERN_INFO PFX "debugfs: Board not initialized.\n");
		res = -EFAULT;
		goto out_unlock;
	}
	if (sscanf(buf, "%lli", &tsf) != 1) {
		printk(KERN_INFO PFX "debugfs: invalid values for \"tsf\"\n");
		res = -EINVAL;
		goto out_unlock;
	}
	bcm43xx_tsf_write(bcm, tsf);
	mmiowb();
	res = buf_size;
	
out_unlock:
	spin_unlock_irqrestore(&bcm->irq_lock, flags);
	mutex_unlock(&bcm->mutex);
out_up:
	up(&big_buffer_sem);
	return res;
}

static ssize_t txstat_read_file(struct file *file, char __user *userbuf,
				size_t count, loff_t *ppos)
{
	const size_t len = REALLY_BIG_BUFFER_SIZE;

	struct bcm43xx_private *bcm = file->private_data;
	char *buf = really_big_buffer;
	size_t pos = 0;
	ssize_t res;
	unsigned long flags;
	struct bcm43xx_dfsentry *e;
	struct bcm43xx_xmitstatus *status;
	int i, cnt, j = 0;

	down(&big_buffer_sem);
	mutex_lock(&bcm->mutex);
	spin_lock_irqsave(&bcm->irq_lock, flags);

	fappend("Last %d logged xmitstatus blobs (Latest first):\n\n",
		BCM43xx_NR_LOGGED_XMITSTATUS);
	e = bcm->dfsentry;
	if (e->xmitstatus_printing == 0) {
		/* At the beginning, make a copy of all data to avoid
		 * concurrency, as this function is called multiple
		 * times for big logs. Without copying, the data might
		 * change between reads. This would result in total trash.
		 */
		e->xmitstatus_printing = 1;
		e->saved_xmitstatus_ptr = e->xmitstatus_ptr;
		e->saved_xmitstatus_cnt = e->xmitstatus_cnt;
		memcpy(e->xmitstatus_print_buffer, e->xmitstatus_buffer,
		       BCM43xx_NR_LOGGED_XMITSTATUS * sizeof(*(e->xmitstatus_buffer)));
	}
	i = e->saved_xmitstatus_ptr - 1;
	if (i < 0)
		i = BCM43xx_NR_LOGGED_XMITSTATUS - 1;
	cnt = e->saved_xmitstatus_cnt;
	while (cnt) {
		status = e->xmitstatus_print_buffer + i;
		fappend("0x%02x:   cookie: 0x%04x,  flags: 0x%02x,  "
			"cnt1: 0x%02x,  cnt2: 0x%02x,  seq: 0x%04x,  "
			"unk: 0x%04x\n", j,
			status->cookie, status->flags,
			status->cnt1, status->cnt2, status->seq,
			status->unknown);
		j++;
		cnt--;
		i--;
		if (i < 0)
			i = BCM43xx_NR_LOGGED_XMITSTATUS - 1;
	}

	spin_unlock_irqrestore(&bcm->irq_lock, flags);
	res = simple_read_from_buffer(userbuf, count, ppos, buf, pos);
	spin_lock_irqsave(&bcm->irq_lock, flags);
	if (*ppos == pos) {
		/* Done. Drop the copied data. */
		e->xmitstatus_printing = 0;
	}
	spin_unlock_irqrestore(&bcm->irq_lock, flags);
	mutex_unlock(&bcm->mutex);
	up(&big_buffer_sem);
	return res;
}

static ssize_t restart_write_file(struct file *file, const char __user *user_buf,
				  size_t count, loff_t *ppos)
{
	struct bcm43xx_private *bcm = file->private_data;
	char *buf = really_big_buffer;
	ssize_t buf_size;
	ssize_t res;
	unsigned long flags;

	buf_size = min(count, sizeof (really_big_buffer) - 1);
	down(&big_buffer_sem);
	if (copy_from_user(buf, user_buf, buf_size)) {
	        res = -EFAULT;
		goto out_up;
	}
	mutex_lock(&(bcm)->mutex);
	spin_lock_irqsave(&(bcm)->irq_lock, flags);
	if (bcm43xx_status(bcm) != BCM43xx_STAT_INITIALIZED) {
		printk(KERN_INFO PFX "debugfs: Board not initialized.\n");
		res = -EFAULT;
		goto out_unlock;
	}
	if (count > 0 && buf[0] == '1') {
		bcm43xx_controller_restart(bcm, "manually restarted");
		res = count;
	} else
		res = -EINVAL;

out_unlock:
	spin_unlock_irqrestore(&(bcm)->irq_lock, flags);
	mutex_unlock(&(bcm)->mutex);
out_up:
	up(&big_buffer_sem);
	return res;
}

#undef fappend


static struct file_operations devinfo_fops = {
	.read = devinfo_read_file,
	.write = write_file_dummy,
	.open = open_file_generic,
};

static struct file_operations spromdump_fops = {
	.read = spromdump_read_file,
	.write = write_file_dummy,
	.open = open_file_generic,
};

static struct file_operations drvinfo_fops = {
	.read = drvinfo_read_file,
	.write = write_file_dummy,
	.open = open_file_generic,
};

static struct file_operations tsf_fops = {
	.read = tsf_read_file,
	.write = tsf_write_file,
	.open = open_file_generic,
};

static struct file_operations txstat_fops = {
	.read = txstat_read_file,
	.write = write_file_dummy,
	.open = open_file_generic,
};

static struct file_operations restart_fops = {
	.write = restart_write_file,
	.open = open_file_generic,
};


void bcm43xx_debugfs_add_device(struct bcm43xx_private *bcm)
{
	struct bcm43xx_dfsentry *e;
	char devdir[IFNAMSIZ];

	assert(bcm);
	e = kzalloc(sizeof(*e), GFP_KERNEL);
	if (!e) {
		printk(KERN_ERR PFX "out of memory\n");
		return;
	}
	e->bcm = bcm;
	e->xmitstatus_buffer = kzalloc(BCM43xx_NR_LOGGED_XMITSTATUS
				       * sizeof(*(e->xmitstatus_buffer)),
				       GFP_KERNEL);
	if (!e->xmitstatus_buffer) {
		printk(KERN_ERR PFX "out of memory\n");
		kfree(e);
		return;
	}
	e->xmitstatus_print_buffer = kzalloc(BCM43xx_NR_LOGGED_XMITSTATUS
					     * sizeof(*(e->xmitstatus_buffer)),
					     GFP_KERNEL);
	if (!e->xmitstatus_print_buffer) {
		printk(KERN_ERR PFX "out of memory\n");
		kfree(e);
		return;
	}


	bcm->dfsentry = e;

	strncpy(devdir, bcm->net_dev->name, ARRAY_SIZE(devdir));
	e->subdir = debugfs_create_dir(devdir, fs.root);
	e->dentry_devinfo = debugfs_create_file("devinfo", 0444, e->subdir,
						bcm, &devinfo_fops);
	if (!e->dentry_devinfo)
		printk(KERN_ERR PFX "debugfs: creating \"devinfo\" for \"%s\" failed!\n", devdir);
	e->dentry_spromdump = debugfs_create_file("sprom_dump", 0444, e->subdir,
						  bcm, &spromdump_fops);
	if (!e->dentry_spromdump)
		printk(KERN_ERR PFX "debugfs: creating \"sprom_dump\" for \"%s\" failed!\n", devdir);
	e->dentry_tsf = debugfs_create_file("tsf", 0666, e->subdir,
	                                    bcm, &tsf_fops);
	if (!e->dentry_tsf)
		printk(KERN_ERR PFX "debugfs: creating \"tsf\" for \"%s\" failed!\n", devdir);
	e->dentry_txstat = debugfs_create_file("tx_status", 0444, e->subdir,
						bcm, &txstat_fops);
	if (!e->dentry_txstat)
		printk(KERN_ERR PFX "debugfs: creating \"tx_status\" for \"%s\" failed!\n", devdir);
	e->dentry_restart = debugfs_create_file("restart", 0222, e->subdir,
						bcm, &restart_fops);
	if (!e->dentry_restart)
		printk(KERN_ERR PFX "debugfs: creating \"restart\" for \"%s\" failed!\n", devdir);
}

void bcm43xx_debugfs_remove_device(struct bcm43xx_private *bcm)
{
	struct bcm43xx_dfsentry *e;

	if (!bcm)
		return;

	e = bcm->dfsentry;
	assert(e);
	debugfs_remove(e->dentry_spromdump);
	debugfs_remove(e->dentry_devinfo);
	debugfs_remove(e->dentry_tsf);
	debugfs_remove(e->dentry_txstat);
	debugfs_remove(e->dentry_restart);
	debugfs_remove(e->subdir);
	kfree(e->xmitstatus_buffer);
	kfree(e->xmitstatus_print_buffer);
	kfree(e);
}

void bcm43xx_debugfs_log_txstat(struct bcm43xx_private *bcm,
				struct bcm43xx_xmitstatus *status)
{
	struct bcm43xx_dfsentry *e;
	struct bcm43xx_xmitstatus *savedstatus;

	/* This is protected by bcm->_lock */
	e = bcm->dfsentry;
	assert(e);
	savedstatus = e->xmitstatus_buffer + e->xmitstatus_ptr;
	memcpy(savedstatus, status, sizeof(*status));
	e->xmitstatus_ptr++;
	if (e->xmitstatus_ptr >= BCM43xx_NR_LOGGED_XMITSTATUS)
		e->xmitstatus_ptr = 0;
	if (e->xmitstatus_cnt < BCM43xx_NR_LOGGED_XMITSTATUS)
		e->xmitstatus_cnt++;
}

void bcm43xx_debugfs_init(void)
{
	memset(&fs, 0, sizeof(fs));
	fs.root = debugfs_create_dir(KBUILD_MODNAME, NULL);
	if (!fs.root)
		printk(KERN_ERR PFX "debugfs: creating \"" KBUILD_MODNAME "\" subdir failed!\n");
	fs.dentry_driverinfo = debugfs_create_file("driver", 0444, fs.root, NULL, &drvinfo_fops);
	if (!fs.dentry_driverinfo)
		printk(KERN_ERR PFX "debugfs: creating \"" KBUILD_MODNAME "/driver\" failed!\n");
}

void bcm43xx_debugfs_exit(void)
{
	debugfs_remove(fs.dentry_driverinfo);
	debugfs_remove(fs.root);
}

void bcm43xx_printk_dump(const char *data,
			 size_t size,
			 const char *description)
{
	size_t i;
	char c;

	printk(KERN_INFO PFX "Data dump (%s, %zd bytes):",
	       description, size);
	for (i = 0; i < size; i++) {
		c = data[i];
		if (i % 8 == 0)
			printk("\n" KERN_INFO PFX "0x%08zx:  0x%02x, ", i, c & 0xff);
		else
			printk("0x%02x, ", c & 0xff);
	}
	printk("\n");
}

void bcm43xx_printk_bitdump(const unsigned char *data,
			    size_t bytes, int msb_to_lsb,
			    const char *description)
{
	size_t i;
	int j;
	const unsigned char *d;

	printk(KERN_INFO PFX "*** Bitdump (%s, %zd bytes, %s) ***",
	       description, bytes, msb_to_lsb ? "MSB to LSB" : "LSB to MSB");
	for (i = 0; i < bytes; i++) {
		d = data + i;
		if (i % 8 == 0)
			printk("\n" KERN_INFO PFX "0x%08zx:  ", i);
		if (msb_to_lsb) {
			for (j = 7; j >= 0; j--) {
				if (*d & (1 << j))
					printk("1");
				else
					printk("0");
			}
		} else {
			for (j = 0; j < 8; j++) {
				if (*d & (1 << j))
					printk("1");
				else
					printk("0");
			}
		}
		printk(" ");
	}
	printk("\n");
}