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b43: Add simple firmware watchdog
[mirror_ubuntu-bionic-kernel.git] / drivers / net / wireless / b43 / debugfs.c
CommitLineData
e4d6b795
MB		 1/*
2
3 Broadcom B43 wireless driver
4
5 debugfs driver debugging code
6
7 Copyright (c) 2005-2007 Michael Buesch <mb@bu3sch.de>
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program; see the file COPYING. If not, write to
21 the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
22 Boston, MA 02110-1301, USA.
23
24*/
25
26#include <linux/fs.h>
27#include <linux/debugfs.h>
28#include <linux/slab.h>
29#include <linux/netdevice.h>
30#include <linux/pci.h>
31#include <linux/mutex.h>
32
33#include "b43.h"
34#include "main.h"
35#include "debugfs.h"
36#include "dma.h"
e4d6b795
MB		 37#include "xmit.h"
38
39
40/* The root directory. */
1a09404a 41static struct dentry *rootdir;
e4d6b795
MB		 42
43struct b43_debugfs_fops {
44 ssize_t (*read)(struct b43_wldev *dev, char *buf, size_t bufsize);
45 int (*write)(struct b43_wldev *dev, const char *buf, size_t count);
46 struct file_operations fops;
47 /* Offset of struct b43_dfs_file in struct b43_dfsentry */
48 size_t file_struct_offset;
49 /* Take wl->irq_lock before calling read/write? */
50 bool take_irqlock;
51};
52
53static inline
54struct b43_dfs_file * fops_to_dfs_file(struct b43_wldev *dev,
55 const struct b43_debugfs_fops *dfops)
56{
57 void *p;
58
59 p = dev->dfsentry;
60 p += dfops->file_struct_offset;
61
62 return p;
63}
64
65
66#define fappend(fmt, x...) \
67 do { \
68 if (bufsize - count) \
69 count += snprintf(buf + count, \
70 bufsize - count, \
71 fmt , ##x); \
72 else \
73 printk(KERN_ERR "b43: fappend overflow\n"); \
74 } while (0)
75
76
6bbc321a
MB		 77/* The biggest address values for SHM access from the debugfs files. */
78#define B43_MAX_SHM_ROUTING 4
79#define B43_MAX_SHM_ADDR 0xFFFF
80
81static ssize_t shm16read__read_file(struct b43_wldev *dev,
82 char *buf, size_t bufsize)
83{
84 ssize_t count = 0;
85 unsigned int routing, addr;
86 u16 val;
87
88 routing = dev->dfsentry->shm16read_routing_next;
89 addr = dev->dfsentry->shm16read_addr_next;
90 if ((routing > B43_MAX_SHM_ROUTING) ||
91 (addr > B43_MAX_SHM_ADDR))
92 return -EDESTADDRREQ;
93
94 val = b43_shm_read16(dev, routing, addr);
95 fappend("0x%04X\n", val);
96
97 return count;
98}
99
100static int shm16read__write_file(struct b43_wldev *dev,
101 const char *buf, size_t count)
102{
103 unsigned int routing, addr;
104 int res;
105
106 res = sscanf(buf, "0x%X 0x%X", &routing, &addr);
107 if (res != 2)
108 return -EINVAL;
109 if (routing > B43_MAX_SHM_ROUTING)
110 return -EADDRNOTAVAIL;
111 if (addr > B43_MAX_SHM_ADDR)
112 return -EADDRNOTAVAIL;
113 if (routing == B43_SHM_SHARED) {
114 if ((addr % 2) != 0)
115 return -EADDRNOTAVAIL;
116 }
117
118 dev->dfsentry->shm16read_routing_next = routing;
119 dev->dfsentry->shm16read_addr_next = addr;
120
121 return 0;
122}
123
124static int shm16write__write_file(struct b43_wldev *dev,
125 const char *buf, size_t count)
126{
127 unsigned int routing, addr, mask, set;
128 u16 val;
129 int res;
130 unsigned long flags;
131
132 res = sscanf(buf, "0x%X 0x%X 0x%X 0x%X",
133 &routing, &addr, &mask, &set);
134 if (res != 4)
135 return -EINVAL;
136 if (routing > B43_MAX_SHM_ROUTING)
137 return -EADDRNOTAVAIL;
138 if (addr > B43_MAX_SHM_ADDR)
139 return -EADDRNOTAVAIL;
140 if (routing == B43_SHM_SHARED) {
141 if ((addr % 2) != 0)
142 return -EADDRNOTAVAIL;
143 }
144 if ((mask > 0xFFFF) || (set > 0xFFFF))
145 return -E2BIG;
146
147 spin_lock_irqsave(&dev->wl->shm_lock, flags);
148 if (mask == 0)
149 val = 0;
150 else
151 val = __b43_shm_read16(dev, routing, addr);
152 val &= mask;
153 val |= set;
154 __b43_shm_write16(dev, routing, addr, val);
155 spin_unlock_irqrestore(&dev->wl->shm_lock, flags);
156
157 return 0;
158}
159
160static ssize_t shm32read__read_file(struct b43_wldev *dev,
161 char *buf, size_t bufsize)
162{
163 ssize_t count = 0;
164 unsigned int routing, addr;
165 u32 val;
166
167 routing = dev->dfsentry->shm32read_routing_next;
168 addr = dev->dfsentry->shm32read_addr_next;
169 if ((routing > B43_MAX_SHM_ROUTING) ||
170 (addr > B43_MAX_SHM_ADDR))
171 return -EDESTADDRREQ;
172
173 val = b43_shm_read32(dev, routing, addr);
174 fappend("0x%08X\n", val);
175
176 return count;
177}
178
179static int shm32read__write_file(struct b43_wldev *dev,
180 const char *buf, size_t count)
181{
182 unsigned int routing, addr;
183 int res;
184
185 res = sscanf(buf, "0x%X 0x%X", &routing, &addr);
186 if (res != 2)
187 return -EINVAL;
188 if (routing > B43_MAX_SHM_ROUTING)
189 return -EADDRNOTAVAIL;
190 if (addr > B43_MAX_SHM_ADDR)
191 return -EADDRNOTAVAIL;
192 if (routing == B43_SHM_SHARED) {
193 if ((addr % 2) != 0)
194 return -EADDRNOTAVAIL;
195 }
196
197 dev->dfsentry->shm32read_routing_next = routing;
198 dev->dfsentry->shm32read_addr_next = addr;
199
200 return 0;
201}
202
203static int shm32write__write_file(struct b43_wldev *dev,
204 const char *buf, size_t count)
205{
206 unsigned int routing, addr, mask, set;
207 u32 val;
208 int res;
209 unsigned long flags;
210
211 res = sscanf(buf, "0x%X 0x%X 0x%X 0x%X",
212 &routing, &addr, &mask, &set);
213 if (res != 4)
214 return -EINVAL;
215 if (routing > B43_MAX_SHM_ROUTING)
216 return -EADDRNOTAVAIL;
217 if (addr > B43_MAX_SHM_ADDR)
218 return -EADDRNOTAVAIL;
219 if (routing == B43_SHM_SHARED) {
220 if ((addr % 2) != 0)
221 return -EADDRNOTAVAIL;
222 }
223 if ((mask > 0xFFFFFFFF) || (set > 0xFFFFFFFF))
224 return -E2BIG;
225
226 spin_lock_irqsave(&dev->wl->shm_lock, flags);
227 if (mask == 0)
228 val = 0;
229 else
230 val = __b43_shm_read32(dev, routing, addr);
231 val &= mask;
232 val |= set;
233 __b43_shm_write32(dev, routing, addr, val);
234 spin_unlock_irqrestore(&dev->wl->shm_lock, flags);
235
236 return 0;
237}
238
8bd463f4
MB		 239/* The biggest MMIO address that we allow access to from the debugfs files. */
240#define B43_MAX_MMIO_ACCESS (0xF00 - 1)
241
242static ssize_t mmio16read__read_file(struct b43_wldev *dev,
243 char *buf, size_t bufsize)
244{
245 ssize_t count = 0;
246 unsigned int addr;
247 u16 val;
248
249 addr = dev->dfsentry->mmio16read_next;
250 if (addr > B43_MAX_MMIO_ACCESS)
251 return -EDESTADDRREQ;
252
253 val = b43_read16(dev, addr);
254 fappend("0x%04X\n", val);
255
256 return count;
257}
258
259static int mmio16read__write_file(struct b43_wldev *dev,
260 const char *buf, size_t count)
261{
262 unsigned int addr;
263 int res;
264
265 res = sscanf(buf, "0x%X", &addr);
266 if (res != 1)
267 return -EINVAL;
268 if (addr > B43_MAX_MMIO_ACCESS)
269 return -EADDRNOTAVAIL;
efa27582
MB		 270 if ((addr % 2) != 0)
271 return -EINVAL;
8bd463f4
MB		 272
273 dev->dfsentry->mmio16read_next = addr;
274
275 return 0;
276}
277
278static int mmio16write__write_file(struct b43_wldev *dev,
279 const char *buf, size_t count)
280{
efa27582 281 unsigned int addr, mask, set;
8bd463f4 282 int res;
efa27582 283 u16 val;
8bd463f4 284
efa27582
MB		 285 res = sscanf(buf, "0x%X 0x%X 0x%X", &addr, &mask, &set);
286 if (res != 3)
8bd463f4
MB		 287 return -EINVAL;
288 if (addr > B43_MAX_MMIO_ACCESS)
289 return -EADDRNOTAVAIL;
efa27582 290 if ((mask > 0xFFFF) || (set > 0xFFFF))
8bd463f4 291 return -E2BIG;
efa27582
MB		 292 if ((addr % 2) != 0)
293 return -EINVAL;
8bd463f4 294
efa27582
MB		 295 if (mask == 0)
296 val = 0;
297 else
298 val = b43_read16(dev, addr);
299 val &= mask;
300 val |= set;
8bd463f4
MB		 301 b43_write16(dev, addr, val);
302
303 return 0;
304}
305
306static ssize_t mmio32read__read_file(struct b43_wldev *dev,
307 char *buf, size_t bufsize)
308{
309 ssize_t count = 0;
310 unsigned int addr;
311 u32 val;
312
313 addr = dev->dfsentry->mmio32read_next;
314 if (addr > B43_MAX_MMIO_ACCESS)
315 return -EDESTADDRREQ;
316
317 val = b43_read32(dev, addr);
318 fappend("0x%08X\n", val);
319
320 return count;
321}
322
323static int mmio32read__write_file(struct b43_wldev *dev,
324 const char *buf, size_t count)
325{
326 unsigned int addr;
327 int res;
328
329 res = sscanf(buf, "0x%X", &addr);
330 if (res != 1)
331 return -EINVAL;
332 if (addr > B43_MAX_MMIO_ACCESS)
333 return -EADDRNOTAVAIL;
efa27582
MB		 334 if ((addr % 4) != 0)
335 return -EINVAL;
8bd463f4
MB		 336
337 dev->dfsentry->mmio32read_next = addr;
338
339 return 0;
340}
341
342static int mmio32write__write_file(struct b43_wldev *dev,
343 const char *buf, size_t count)
344{
efa27582 345 unsigned int addr, mask, set;
8bd463f4 346 int res;
efa27582 347 u32 val;
8bd463f4 348
efa27582
MB		 349 res = sscanf(buf, "0x%X 0x%X 0x%X", &addr, &mask, &set);
350 if (res != 3)
8bd463f4
MB		 351 return -EINVAL;
352 if (addr > B43_MAX_MMIO_ACCESS)
353 return -EADDRNOTAVAIL;
efa27582 354 if ((mask > 0xFFFFFFFF) || (set > 0xFFFFFFFF))
8bd463f4 355 return -E2BIG;
efa27582
MB		 356 if ((addr % 4) != 0)
357 return -EINVAL;
8bd463f4 358
efa27582
MB		 359 if (mask == 0)
360 val = 0;
361 else
362 val = b43_read32(dev, addr);
363 val &= mask;
364 val |= set;
8bd463f4
MB		 365 b43_write32(dev, addr, val);
366
367 return 0;
368}
369
e4d6b795 370/* wl->irq_lock is locked */
1a09404a
MB		 371static ssize_t tsf_read_file(struct b43_wldev *dev,
372 char *buf, size_t bufsize)
e4d6b795
MB		 373{
374 ssize_t count = 0;
375 u64 tsf;
376
377 b43_tsf_read(dev, &tsf);
378 fappend("0x%08x%08x\n",
379 (unsigned int)((tsf & 0xFFFFFFFF00000000ULL) >> 32),
380 (unsigned int)(tsf & 0xFFFFFFFFULL));
381
382 return count;
383}
384
385/* wl->irq_lock is locked */
1a09404a
MB		 386static int tsf_write_file(struct b43_wldev *dev,
387 const char *buf, size_t count)
e4d6b795
MB		 388{
389 u64 tsf;
390
391 if (sscanf(buf, "%llu", (unsigned long long *)(&tsf)) != 1)
392 return -EINVAL;
393 b43_tsf_write(dev, tsf);
394
395 return 0;
396}
397
1a09404a
MB		 398static ssize_t txstat_read_file(struct b43_wldev *dev,
399 char *buf, size_t bufsize)
e4d6b795
MB		 400{
401 struct b43_txstatus_log *log = &dev->dfsentry->txstatlog;
402 ssize_t count = 0;
403 unsigned long flags;
404 int i, idx;
405 struct b43_txstatus *stat;
406
407 spin_lock_irqsave(&log->lock, flags);
408 if (log->end < 0) {
409 fappend("Nothing transmitted, yet\n");
410 goto out_unlock;
411 }
412 fappend("b43 TX status reports:\n\n"
413 "index | cookie | seq | phy_stat | frame_count | "
414 "rts_count | supp_reason | pm_indicated | "
415 "intermediate | for_ampdu | acked\n" "---\n");
416 i = log->end + 1;
417 idx = 0;
418 while (1) {
419 if (i == B43_NR_LOGGED_TXSTATUS)
420 i = 0;
421 stat = &(log->log[i]);
422 if (stat->cookie) {
423 fappend("%03d | "
424 "0x%04X | 0x%04X | 0x%02X | "
425 "0x%X | 0x%X | "
426 "%u | %u | "
427 "%u | %u | %u\n",
428 idx,
429 stat->cookie, stat->seq, stat->phy_stat,
430 stat->frame_count, stat->rts_count,
431 stat->supp_reason, stat->pm_indicated,
432 stat->intermediate, stat->for_ampdu,
433 stat->acked);
434 idx++;
435 }
436 if (i == log->end)
437 break;
438 i++;
439 }
440out_unlock:
441 spin_unlock_irqrestore(&log->lock, flags);
442
443 return count;
444}
445
1a09404a
MB		 446static ssize_t txpower_g_read_file(struct b43_wldev *dev,
447 char *buf, size_t bufsize)
e4d6b795
MB		 448{
449 ssize_t count = 0;
450
451 if (dev->phy.type != B43_PHYTYPE_G) {
452 fappend("Device is not a G-PHY\n");
453 goto out;
454 }
455 fappend("Control: %s\n", dev->phy.manual_txpower_control ?
456 "MANUAL" : "AUTOMATIC");
457 fappend("Baseband attenuation: %u\n", dev->phy.bbatt.att);
458 fappend("Radio attenuation: %u\n", dev->phy.rfatt.att);
459 fappend("TX Mixer Gain: %s\n",
460 (dev->phy.tx_control & B43_TXCTL_TXMIX) ? "ON" : "OFF");
461 fappend("PA Gain 2dB: %s\n",
462 (dev->phy.tx_control & B43_TXCTL_PA2DB) ? "ON" : "OFF");
463 fappend("PA Gain 3dB: %s\n",
464 (dev->phy.tx_control & B43_TXCTL_PA3DB) ? "ON" : "OFF");
465 fappend("\n\n");
466 fappend("You can write to this file:\n");
467 fappend("Writing \"auto\" enables automatic txpower control.\n");
468 fappend
469 ("Writing the attenuation values as \"bbatt rfatt txmix pa2db pa3db\" "
470 "enables manual txpower control.\n");
471 fappend("Example: 5 4 0 0 1\n");
472 fappend("Enables manual control with Baseband attenuation 5, "
473 "Radio attenuation 4, No TX Mixer Gain, "
474 "No PA Gain 2dB, With PA Gain 3dB.\n");
475out:
476 return count;
477}
478
1a09404a
MB		 479static int txpower_g_write_file(struct b43_wldev *dev,
480 const char *buf, size_t count)
e4d6b795 481{
b85b3b7a
MB		 482 if (dev->phy.type != B43_PHYTYPE_G)
483 return -ENODEV;
e4d6b795
MB		 484 if ((count >= 4) && (memcmp(buf, "auto", 4) == 0)) {
485 /* Automatic control */
486 dev->phy.manual_txpower_control = 0;
487 b43_phy_xmitpower(dev);
488 } else {
489 int bbatt = 0, rfatt = 0, txmix = 0, pa2db = 0, pa3db = 0;
490 /* Manual control */
491 if (sscanf(buf, "%d %d %d %d %d", &bbatt, &rfatt,
b85b3b7a
MB		 492 &txmix, &pa2db, &pa3db) != 5)
493 return -EINVAL;
e4d6b795
MB		 494 b43_put_attenuation_into_ranges(dev, &bbatt, &rfatt);
495 dev->phy.manual_txpower_control = 1;
496 dev->phy.bbatt.att = bbatt;
497 dev->phy.rfatt.att = rfatt;
498 dev->phy.tx_control = 0;
499 if (txmix)
500 dev->phy.tx_control |= B43_TXCTL_TXMIX;
501 if (pa2db)
502 dev->phy.tx_control |= B43_TXCTL_PA2DB;
503 if (pa3db)
504 dev->phy.tx_control |= B43_TXCTL_PA3DB;
f31800d8 505 b43_phy_lock(dev);
e4d6b795
MB		 506 b43_radio_lock(dev);
507 b43_set_txpower_g(dev, &dev->phy.bbatt,
508 &dev->phy.rfatt, dev->phy.tx_control);
509 b43_radio_unlock(dev);
f31800d8 510 b43_phy_unlock(dev);
e4d6b795 511 }
e4d6b795 512
b85b3b7a 513 return 0;
e4d6b795
MB		 514}
515
516/* wl->irq_lock is locked */
1a09404a
MB		 517static int restart_write_file(struct b43_wldev *dev,
518 const char *buf, size_t count)
e4d6b795
MB		 519{
520 int err = 0;
521
522 if (count > 0 && buf[0] == '1') {
523 b43_controller_restart(dev, "manually restarted");
524 } else
525 err = -EINVAL;
526
527 return err;
528}
529
f5eda47f
MB		 530static unsigned long calc_expire_secs(unsigned long now,
531 unsigned long time,
532 unsigned long expire)
e4d6b795 533{
f5eda47f
MB		 534 expire = time + expire;
535
536 if (time_after(now, expire))
537 return 0; /* expired */
538 if (expire < now) {
539 /* jiffies wrapped */
540 expire -= MAX_JIFFY_OFFSET;
541 now -= MAX_JIFFY_OFFSET;
e4d6b795 542 }
f5eda47f 543 B43_WARN_ON(expire < now);
e4d6b795 544
f5eda47f 545 return (expire - now) / HZ;
e4d6b795
MB		 546}
547
1a09404a
MB		 548static ssize_t loctls_read_file(struct b43_wldev *dev,
549 char *buf, size_t bufsize)
e4d6b795
MB		 550{
551 ssize_t count = 0;
552 struct b43_txpower_lo_control *lo;
553 int i, err = 0;
f5eda47f
MB		 554 struct b43_lo_calib *cal;
555 unsigned long now = jiffies;
556 struct b43_phy *phy = &dev->phy;
e4d6b795 557
f5eda47f 558 if (phy->type != B43_PHYTYPE_G) {
e4d6b795
MB		 559 fappend("Device is not a G-PHY\n");
560 err = -ENODEV;
561 goto out;
562 }
f5eda47f 563 lo = phy->lo_control;
e4d6b795 564 fappend("-- Local Oscillator calibration data --\n\n");
f5eda47f 565 fappend("HW-power-control enabled: %d\n",
e4d6b795 566 dev->phy.hardware_power_control);
f5eda47f
MB		 567 fappend("TX Bias: 0x%02X, TX Magn: 0x%02X (expire in %lu sec)\n",
568 lo->tx_bias, lo->tx_magn,
569 calc_expire_secs(now, lo->txctl_measured_time,
570 B43_LO_TXCTL_EXPIRE));
571 fappend("Power Vector: 0x%08X%08X (expires in %lu sec)\n",
e4d6b795 572 (unsigned int)((lo->power_vector & 0xFFFFFFFF00000000ULL) >> 32),
f5eda47f
MB		 573 (unsigned int)(lo->power_vector & 0x00000000FFFFFFFFULL),
574 calc_expire_secs(now, lo->pwr_vec_read_time,
575 B43_LO_PWRVEC_EXPIRE));
576
577 fappend("\nCalibrated settings:\n");
578 list_for_each_entry(cal, &lo->calib_list, list) {
579 bool active;
580
581 active = (b43_compare_bbatt(&cal->bbatt, &phy->bbatt) &&
582 b43_compare_rfatt(&cal->rfatt, &phy->rfatt));
583 fappend("BB(%d), RF(%d,%d) -> I=%d, Q=%d "
584 "(expires in %lu sec)%s\n",
585 cal->bbatt.att,
586 cal->rfatt.att, cal->rfatt.with_padmix,
587 cal->ctl.i, cal->ctl.q,
588 calc_expire_secs(now, cal->calib_time,
589 B43_LO_CALIB_EXPIRE),
590 active ? " ACTIVE" : "");
591 }
592
e4d6b795
MB		 593 fappend("\nUsed RF attenuation values: Value(WithPadmix flag)\n");
594 for (i = 0; i < lo->rfatt_list.len; i++) {
595 fappend("%u(%d), ",
596 lo->rfatt_list.list[i].att,
597 lo->rfatt_list.list[i].with_padmix);
598 }
599 fappend("\n");
600 fappend("\nUsed Baseband attenuation values:\n");
601 for (i = 0; i < lo->bbatt_list.len; i++) {
602 fappend("%u, ",
603 lo->bbatt_list.list[i].att);
604 }
605 fappend("\n");
606
607out:
608 return err ? err : count;
609}
610
611#undef fappend
612
613static int b43_debugfs_open(struct inode *inode, struct file *file)
614{
615 file->private_data = inode->i_private;
616 return 0;
617}
618
619static ssize_t b43_debugfs_read(struct file *file, char __user *userbuf,
620 size_t count, loff_t *ppos)
621{
622 struct b43_wldev *dev;
623 struct b43_debugfs_fops *dfops;
624 struct b43_dfs_file *dfile;
7223e8d9 625 ssize_t uninitialized_var(ret);
e4d6b795 626 char *buf;
f5eda47f 627 const size_t bufsize = 1024 * 16; /* 16 kiB buffer */
e4d6b795
MB		 628 const size_t buforder = get_order(bufsize);
629 int err = 0;
630
631 if (!count)
632 return 0;
633 dev = file->private_data;
634 if (!dev)
635 return -ENODEV;
636
637 mutex_lock(&dev->wl->mutex);
638 if (b43_status(dev) < B43_STAT_INITIALIZED) {
639 err = -ENODEV;
640 goto out_unlock;
641 }
642
643 dfops = container_of(file->f_op, struct b43_debugfs_fops, fops);
644 if (!dfops->read) {
645 err = -ENOSYS;
646 goto out_unlock;
647 }
648 dfile = fops_to_dfs_file(dev, dfops);
649
650 if (!dfile->buffer) {
651 buf = (char *)__get_free_pages(GFP_KERNEL, buforder);
652 if (!buf) {
653 err = -ENOMEM;
654 goto out_unlock;
655 }
656 memset(buf, 0, bufsize);
657 if (dfops->take_irqlock) {
658 spin_lock_irq(&dev->wl->irq_lock);
659 ret = dfops->read(dev, buf, bufsize);
660 spin_unlock_irq(&dev->wl->irq_lock);
661 } else
662 ret = dfops->read(dev, buf, bufsize);
663 if (ret <= 0) {
664 free_pages((unsigned long)buf, buforder);
665 err = ret;
666 goto out_unlock;
667 }
668 dfile->data_len = ret;
669 dfile->buffer = buf;
670 }
671
672 ret = simple_read_from_buffer(userbuf, count, ppos,
673 dfile->buffer,
674 dfile->data_len);
675 if (*ppos >= dfile->data_len) {
676 free_pages((unsigned long)dfile->buffer, buforder);
677 dfile->buffer = NULL;
678 dfile->data_len = 0;
679 }
680out_unlock:
681 mutex_unlock(&dev->wl->mutex);
682
683 return err ? err : ret;
684}
685
686static ssize_t b43_debugfs_write(struct file *file,
687 const char __user *userbuf,
688 size_t count, loff_t *ppos)
689{
690 struct b43_wldev *dev;
691 struct b43_debugfs_fops *dfops;
692 char *buf;
693 int err = 0;
694
695 if (!count)
696 return 0;
697 if (count > PAGE_SIZE)
698 return -E2BIG;
699 dev = file->private_data;
700 if (!dev)
701 return -ENODEV;
702
703 mutex_lock(&dev->wl->mutex);
704 if (b43_status(dev) < B43_STAT_INITIALIZED) {
705 err = -ENODEV;
706 goto out_unlock;
707 }
708
709 dfops = container_of(file->f_op, struct b43_debugfs_fops, fops);
710 if (!dfops->write) {
711 err = -ENOSYS;
712 goto out_unlock;
713 }
714
715 buf = (char *)get_zeroed_page(GFP_KERNEL);
716 if (!buf) {
717 err = -ENOMEM;
718 goto out_unlock;
719 }
720 if (copy_from_user(buf, userbuf, count)) {
721 err = -EFAULT;
722 goto out_freepage;
723 }
724 if (dfops->take_irqlock) {
725 spin_lock_irq(&dev->wl->irq_lock);
726 err = dfops->write(dev, buf, count);
727 spin_unlock_irq(&dev->wl->irq_lock);
728 } else
729 err = dfops->write(dev, buf, count);
730 if (err)
731 goto out_freepage;
732
733out_freepage:
734 free_page((unsigned long)buf);
735out_unlock:
736 mutex_unlock(&dev->wl->mutex);
737
738 return err ? err : count;
739}
740
741
742#define B43_DEBUGFS_FOPS(name, _read, _write, _take_irqlock) \
743 static struct b43_debugfs_fops fops_##name = { \
744 .read = _read, \
745 .write = _write, \
746 .fops = { \
747 .open = b43_debugfs_open, \
748 .read = b43_debugfs_read, \
749 .write = b43_debugfs_write, \
750 }, \
751 .file_struct_offset = offsetof(struct b43_dfsentry, \
752 file_##name), \
753 .take_irqlock = _take_irqlock, \
754 }
755
6bbc321a
MB		 756B43_DEBUGFS_FOPS(shm16read, shm16read__read_file, shm16read__write_file, 1);
757B43_DEBUGFS_FOPS(shm16write, NULL, shm16write__write_file, 1);
758B43_DEBUGFS_FOPS(shm32read, shm32read__read_file, shm32read__write_file, 1);
759B43_DEBUGFS_FOPS(shm32write, NULL, shm32write__write_file, 1);
8bd463f4
MB		 760B43_DEBUGFS_FOPS(mmio16read, mmio16read__read_file, mmio16read__write_file, 1);
761B43_DEBUGFS_FOPS(mmio16write, NULL, mmio16write__write_file, 1);
762B43_DEBUGFS_FOPS(mmio32read, mmio32read__read_file, mmio32read__write_file, 1);
763B43_DEBUGFS_FOPS(mmio32write, NULL, mmio32write__write_file, 1);
e4d6b795 764B43_DEBUGFS_FOPS(tsf, tsf_read_file, tsf_write_file, 1);
e4d6b795
MB		 765B43_DEBUGFS_FOPS(txstat, txstat_read_file, NULL, 0);
766B43_DEBUGFS_FOPS(txpower_g, txpower_g_read_file, txpower_g_write_file, 0);
767B43_DEBUGFS_FOPS(restart, NULL, restart_write_file, 1);
768B43_DEBUGFS_FOPS(loctls, loctls_read_file, NULL, 0);
769
770
771int b43_debug(struct b43_wldev *dev, enum b43_dyndbg feature)
772{
773 return !!(dev->dfsentry && dev->dfsentry->dyn_debug[feature]);
774}
775
776static void b43_remove_dynamic_debug(struct b43_wldev *dev)
777{
778 struct b43_dfsentry *e = dev->dfsentry;
779 int i;
780
781 for (i = 0; i < __B43_NR_DYNDBG; i++)
782 debugfs_remove(e->dyn_debug_dentries[i]);
783}
784
785static void b43_add_dynamic_debug(struct b43_wldev *dev)
786{
787 struct b43_dfsentry *e = dev->dfsentry;
788 struct dentry *d;
789
790#define add_dyn_dbg(name, id, initstate) do { \
791 e->dyn_debug[id] = (initstate); \
792 d = debugfs_create_bool(name, 0600, e->subdir, \
793 &(e->dyn_debug[id])); \
794 if (!IS_ERR(d)) \
795 e->dyn_debug_dentries[id] = d; \
796 } while (0)
797
798 add_dyn_dbg("debug_xmitpower", B43_DBG_XMITPOWER, 0);
799 add_dyn_dbg("debug_dmaoverflow", B43_DBG_DMAOVERFLOW, 0);
800 add_dyn_dbg("debug_dmaverbose", B43_DBG_DMAVERBOSE, 0);
801 add_dyn_dbg("debug_pwork_fast", B43_DBG_PWORK_FAST, 0);
802 add_dyn_dbg("debug_pwork_stop", B43_DBG_PWORK_STOP, 0);
f5eda47f 803 add_dyn_dbg("debug_lo", B43_DBG_LO, 0);
e4d6b795
MB		 804
805#undef add_dyn_dbg
806}
807
808void b43_debugfs_add_device(struct b43_wldev *dev)
809{
810 struct b43_dfsentry *e;
811 struct b43_txstatus_log *log;
812 char devdir[16];
813
814 B43_WARN_ON(!dev);
815 e = kzalloc(sizeof(*e), GFP_KERNEL);
816 if (!e) {
817 b43err(dev->wl, "debugfs: add device OOM\n");
818 return;
819 }
820 e->dev = dev;
821 log = &e->txstatlog;
822 log->log = kcalloc(B43_NR_LOGGED_TXSTATUS,
823 sizeof(struct b43_txstatus), GFP_KERNEL);
824 if (!log->log) {
825 b43err(dev->wl, "debugfs: add device txstatus OOM\n");
826 kfree(e);
827 return;
828 }
829 log->end = -1;
830 spin_lock_init(&log->lock);
831
832 dev->dfsentry = e;
833
834 snprintf(devdir, sizeof(devdir), "%s", wiphy_name(dev->wl->hw->wiphy));
835 e->subdir = debugfs_create_dir(devdir, rootdir);
836 if (!e->subdir || IS_ERR(e->subdir)) {
837 if (e->subdir == ERR_PTR(-ENODEV)) {
838 b43dbg(dev->wl, "DebugFS (CONFIG_DEBUG_FS) not "
839 "enabled in kernel config\n");
840 } else {
841 b43err(dev->wl, "debugfs: cannot create %s directory\n",
842 devdir);
843 }
844 dev->dfsentry = NULL;
845 kfree(log->log);
846 kfree(e);
847 return;
848 }
849
8bd463f4
MB		 850 e->mmio16read_next = 0xFFFF; /* invalid address */
851 e->mmio32read_next = 0xFFFF; /* invalid address */
6bbc321a
MB		 852 e->shm16read_routing_next = 0xFFFFFFFF; /* invalid routing */
853 e->shm16read_addr_next = 0xFFFFFFFF; /* invalid address */
854 e->shm32read_routing_next = 0xFFFFFFFF; /* invalid routing */
855 e->shm32read_addr_next = 0xFFFFFFFF; /* invalid address */
8bd463f4 856
e4d6b795
MB		 857#define ADD_FILE(name, mode) \
858 do { \
859 struct dentry *d; \
860 d = debugfs_create_file(__stringify(name), \
861 mode, e->subdir, dev, \
862 &fops_##name.fops); \
863 e->file_##name.dentry = NULL; \
864 if (!IS_ERR(d)) \
865 e->file_##name.dentry = d; \
866 } while (0)
867
868
6bbc321a
MB		 869 ADD_FILE(shm16read, 0600);
870 ADD_FILE(shm16write, 0200);
871 ADD_FILE(shm32read, 0600);
872 ADD_FILE(shm32write, 0200);
8bd463f4
MB		 873 ADD_FILE(mmio16read, 0600);
874 ADD_FILE(mmio16write, 0200);
875 ADD_FILE(mmio32read, 0600);
876 ADD_FILE(mmio32write, 0200);
e4d6b795 877 ADD_FILE(tsf, 0600);
e4d6b795
MB		 878 ADD_FILE(txstat, 0400);
879 ADD_FILE(txpower_g, 0600);
880 ADD_FILE(restart, 0200);
881 ADD_FILE(loctls, 0400);
882
883#undef ADD_FILE
884
885 b43_add_dynamic_debug(dev);
886}
887
888void b43_debugfs_remove_device(struct b43_wldev *dev)
889{
890 struct b43_dfsentry *e;
891
892 if (!dev)
893 return;
894 e = dev->dfsentry;
895 if (!e)
896 return;
897 b43_remove_dynamic_debug(dev);
898
6bbc321a
MB		 899 debugfs_remove(e->file_shm16read.dentry);
900 debugfs_remove(e->file_shm16write.dentry);
901 debugfs_remove(e->file_shm32read.dentry);
902 debugfs_remove(e->file_shm32write.dentry);
8bd463f4
MB		 903 debugfs_remove(e->file_mmio16read.dentry);
904 debugfs_remove(e->file_mmio16write.dentry);
905 debugfs_remove(e->file_mmio32read.dentry);
906 debugfs_remove(e->file_mmio32write.dentry);
e4d6b795 907 debugfs_remove(e->file_tsf.dentry);
e4d6b795
MB		 908 debugfs_remove(e->file_txstat.dentry);
909 debugfs_remove(e->file_txpower_g.dentry);
910 debugfs_remove(e->file_restart.dentry);
911 debugfs_remove(e->file_loctls.dentry);
912
913 debugfs_remove(e->subdir);
914 kfree(e->txstatlog.log);
915 kfree(e);
916}
917
7a193a5d 918/* Called with IRQs disabled. */
e4d6b795
MB		 919void b43_debugfs_log_txstat(struct b43_wldev *dev,
920 const struct b43_txstatus *status)
921{
922 struct b43_dfsentry *e = dev->dfsentry;
923 struct b43_txstatus_log *log;
924 struct b43_txstatus *cur;
925 int i;
926
927 if (!e)
928 return;
929 log = &e->txstatlog;
7a193a5d 930 spin_lock(&log->lock); /* IRQs are already disabled. */
e4d6b795
MB		 931 i = log->end + 1;
932 if (i == B43_NR_LOGGED_TXSTATUS)
933 i = 0;
934 log->end = i;
935 cur = &(log->log[i]);
936 memcpy(cur, status, sizeof(*cur));
937 spin_unlock(&log->lock);
938}
939
940void b43_debugfs_init(void)
941{
942 rootdir = debugfs_create_dir(KBUILD_MODNAME, NULL);
943 if (IS_ERR(rootdir))
944 rootdir = NULL;
945}
946
947void b43_debugfs_exit(void)
948{
949 debugfs_remove(rootdir);
950}
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