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b43: Add debugfs files for random SHM access
[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;
270
271 dev->dfsentry->mmio16read_next = addr;
272
273 return 0;
274}
275
276static int mmio16write__write_file(struct b43_wldev *dev,
277 const char *buf, size_t count)
278{
279 unsigned int addr, val;
280 int res;
281
282 res = sscanf(buf, "0x%X = 0x%X", &addr, &val);
283 if (res != 2)
284 return -EINVAL;
285 if (addr > B43_MAX_MMIO_ACCESS)
286 return -EADDRNOTAVAIL;
287 if (val > 0xFFFF)
288 return -E2BIG;
289
290 b43_write16(dev, addr, val);
291
292 return 0;
293}
294
295static ssize_t mmio32read__read_file(struct b43_wldev *dev,
296 char *buf, size_t bufsize)
297{
298 ssize_t count = 0;
299 unsigned int addr;
300 u32 val;
301
302 addr = dev->dfsentry->mmio32read_next;
303 if (addr > B43_MAX_MMIO_ACCESS)
304 return -EDESTADDRREQ;
305
306 val = b43_read32(dev, addr);
307 fappend("0x%08X\n", val);
308
309 return count;
310}
311
312static int mmio32read__write_file(struct b43_wldev *dev,
313 const char *buf, size_t count)
314{
315 unsigned int addr;
316 int res;
317
318 res = sscanf(buf, "0x%X", &addr);
319 if (res != 1)
320 return -EINVAL;
321 if (addr > B43_MAX_MMIO_ACCESS)
322 return -EADDRNOTAVAIL;
323
324 dev->dfsentry->mmio32read_next = addr;
325
326 return 0;
327}
328
329static int mmio32write__write_file(struct b43_wldev *dev,
330 const char *buf, size_t count)
331{
332 unsigned int addr, val;
333 int res;
334
335 res = sscanf(buf, "0x%X = 0x%X", &addr, &val);
336 if (res != 2)
337 return -EINVAL;
338 if (addr > B43_MAX_MMIO_ACCESS)
339 return -EADDRNOTAVAIL;
340 if (val > 0xFFFFFFFF)
341 return -E2BIG;
342
343 b43_write32(dev, addr, val);
344
345 return 0;
346}
347
e4d6b795 348/* wl->irq_lock is locked */
1a09404a
MB		 349static ssize_t tsf_read_file(struct b43_wldev *dev,
350 char *buf, size_t bufsize)
e4d6b795
MB		 351{
352 ssize_t count = 0;
353 u64 tsf;
354
355 b43_tsf_read(dev, &tsf);
356 fappend("0x%08x%08x\n",
357 (unsigned int)((tsf & 0xFFFFFFFF00000000ULL) >> 32),
358 (unsigned int)(tsf & 0xFFFFFFFFULL));
359
360 return count;
361}
362
363/* wl->irq_lock is locked */
1a09404a
MB		 364static int tsf_write_file(struct b43_wldev *dev,
365 const char *buf, size_t count)
e4d6b795
MB		 366{
367 u64 tsf;
368
369 if (sscanf(buf, "%llu", (unsigned long long *)(&tsf)) != 1)
370 return -EINVAL;
371 b43_tsf_write(dev, tsf);
372
373 return 0;
374}
375
376/* wl->irq_lock is locked */
1a09404a
MB		 377static ssize_t ucode_regs_read_file(struct b43_wldev *dev,
378 char *buf, size_t bufsize)
e4d6b795
MB		 379{
380 ssize_t count = 0;
381 int i;
382
383 for (i = 0; i < 64; i++) {
384 fappend("r%d = 0x%04x\n", i,
385 b43_shm_read16(dev, B43_SHM_SCRATCH, i));
386 }
387
388 return count;
389}
390
391/* wl->irq_lock is locked */
1a09404a
MB		 392static ssize_t shm_read_file(struct b43_wldev *dev,
393 char *buf, size_t bufsize)
e4d6b795
MB		 394{
395 ssize_t count = 0;
396 int i;
397 u16 tmp;
398 __le16 *le16buf = (__le16 *)buf;
399
400 for (i = 0; i < 0x1000; i++) {
30c4ae42 401 if (bufsize < sizeof(tmp))
e4d6b795
MB		 402 break;
403 tmp = b43_shm_read16(dev, B43_SHM_SHARED, 2 * i);
404 le16buf[i] = cpu_to_le16(tmp);
405 count += sizeof(tmp);
406 bufsize -= sizeof(tmp);
407 }
408
409 return count;
410}
411
1a09404a
MB		 412static ssize_t txstat_read_file(struct b43_wldev *dev,
413 char *buf, size_t bufsize)
e4d6b795
MB		 414{
415 struct b43_txstatus_log *log = &dev->dfsentry->txstatlog;
416 ssize_t count = 0;
417 unsigned long flags;
418 int i, idx;
419 struct b43_txstatus *stat;
420
421 spin_lock_irqsave(&log->lock, flags);
422 if (log->end < 0) {
423 fappend("Nothing transmitted, yet\n");
424 goto out_unlock;
425 }
426 fappend("b43 TX status reports:\n\n"
427 "index | cookie | seq | phy_stat | frame_count | "
428 "rts_count | supp_reason | pm_indicated | "
429 "intermediate | for_ampdu | acked\n" "---\n");
430 i = log->end + 1;
431 idx = 0;
432 while (1) {
433 if (i == B43_NR_LOGGED_TXSTATUS)
434 i = 0;
435 stat = &(log->log[i]);
436 if (stat->cookie) {
437 fappend("%03d | "
438 "0x%04X | 0x%04X | 0x%02X | "
439 "0x%X | 0x%X | "
440 "%u | %u | "
441 "%u | %u | %u\n",
442 idx,
443 stat->cookie, stat->seq, stat->phy_stat,
444 stat->frame_count, stat->rts_count,
445 stat->supp_reason, stat->pm_indicated,
446 stat->intermediate, stat->for_ampdu,
447 stat->acked);
448 idx++;
449 }
450 if (i == log->end)
451 break;
452 i++;
453 }
454out_unlock:
455 spin_unlock_irqrestore(&log->lock, flags);
456
457 return count;
458}
459
1a09404a
MB		 460static ssize_t txpower_g_read_file(struct b43_wldev *dev,
461 char *buf, size_t bufsize)
e4d6b795
MB		 462{
463 ssize_t count = 0;
464
465 if (dev->phy.type != B43_PHYTYPE_G) {
466 fappend("Device is not a G-PHY\n");
467 goto out;
468 }
469 fappend("Control: %s\n", dev->phy.manual_txpower_control ?
470 "MANUAL" : "AUTOMATIC");
471 fappend("Baseband attenuation: %u\n", dev->phy.bbatt.att);
472 fappend("Radio attenuation: %u\n", dev->phy.rfatt.att);
473 fappend("TX Mixer Gain: %s\n",
474 (dev->phy.tx_control & B43_TXCTL_TXMIX) ? "ON" : "OFF");
475 fappend("PA Gain 2dB: %s\n",
476 (dev->phy.tx_control & B43_TXCTL_PA2DB) ? "ON" : "OFF");
477 fappend("PA Gain 3dB: %s\n",
478 (dev->phy.tx_control & B43_TXCTL_PA3DB) ? "ON" : "OFF");
479 fappend("\n\n");
480 fappend("You can write to this file:\n");
481 fappend("Writing \"auto\" enables automatic txpower control.\n");
482 fappend
483 ("Writing the attenuation values as \"bbatt rfatt txmix pa2db pa3db\" "
484 "enables manual txpower control.\n");
485 fappend("Example: 5 4 0 0 1\n");
486 fappend("Enables manual control with Baseband attenuation 5, "
487 "Radio attenuation 4, No TX Mixer Gain, "
488 "No PA Gain 2dB, With PA Gain 3dB.\n");
489out:
490 return count;
491}
492
1a09404a
MB		 493static int txpower_g_write_file(struct b43_wldev *dev,
494 const char *buf, size_t count)
e4d6b795 495{
b85b3b7a
MB		 496 if (dev->phy.type != B43_PHYTYPE_G)
497 return -ENODEV;
e4d6b795
MB		 498 if ((count >= 4) && (memcmp(buf, "auto", 4) == 0)) {
499 /* Automatic control */
500 dev->phy.manual_txpower_control = 0;
501 b43_phy_xmitpower(dev);
502 } else {
503 int bbatt = 0, rfatt = 0, txmix = 0, pa2db = 0, pa3db = 0;
504 /* Manual control */
505 if (sscanf(buf, "%d %d %d %d %d", &bbatt, &rfatt,
b85b3b7a
MB		 506 &txmix, &pa2db, &pa3db) != 5)
507 return -EINVAL;
e4d6b795
MB		 508 b43_put_attenuation_into_ranges(dev, &bbatt, &rfatt);
509 dev->phy.manual_txpower_control = 1;
510 dev->phy.bbatt.att = bbatt;
511 dev->phy.rfatt.att = rfatt;
512 dev->phy.tx_control = 0;
513 if (txmix)
514 dev->phy.tx_control |= B43_TXCTL_TXMIX;
515 if (pa2db)
516 dev->phy.tx_control |= B43_TXCTL_PA2DB;
517 if (pa3db)
518 dev->phy.tx_control |= B43_TXCTL_PA3DB;
f31800d8 519 b43_phy_lock(dev);
e4d6b795
MB		 520 b43_radio_lock(dev);
521 b43_set_txpower_g(dev, &dev->phy.bbatt,
522 &dev->phy.rfatt, dev->phy.tx_control);
523 b43_radio_unlock(dev);
f31800d8 524 b43_phy_unlock(dev);
e4d6b795 525 }
e4d6b795 526
b85b3b7a 527 return 0;
e4d6b795
MB		 528}
529
530/* wl->irq_lock is locked */
1a09404a
MB		 531static int restart_write_file(struct b43_wldev *dev,
532 const char *buf, size_t count)
e4d6b795
MB		 533{
534 int err = 0;
535
536 if (count > 0 && buf[0] == '1') {
537 b43_controller_restart(dev, "manually restarted");
538 } else
539 err = -EINVAL;
540
541 return err;
542}
543
f5eda47f
MB		 544static unsigned long calc_expire_secs(unsigned long now,
545 unsigned long time,
546 unsigned long expire)
e4d6b795 547{
f5eda47f
MB		 548 expire = time + expire;
549
550 if (time_after(now, expire))
551 return 0; /* expired */
552 if (expire < now) {
553 /* jiffies wrapped */
554 expire -= MAX_JIFFY_OFFSET;
555 now -= MAX_JIFFY_OFFSET;
e4d6b795 556 }
f5eda47f 557 B43_WARN_ON(expire < now);
e4d6b795 558
f5eda47f 559 return (expire - now) / HZ;
e4d6b795
MB		 560}
561
1a09404a
MB		 562static ssize_t loctls_read_file(struct b43_wldev *dev,
563 char *buf, size_t bufsize)
e4d6b795
MB		 564{
565 ssize_t count = 0;
566 struct b43_txpower_lo_control *lo;
567 int i, err = 0;
f5eda47f
MB		 568 struct b43_lo_calib *cal;
569 unsigned long now = jiffies;
570 struct b43_phy *phy = &dev->phy;
e4d6b795 571
f5eda47f 572 if (phy->type != B43_PHYTYPE_G) {
e4d6b795
MB		 573 fappend("Device is not a G-PHY\n");
574 err = -ENODEV;
575 goto out;
576 }
f5eda47f 577 lo = phy->lo_control;
e4d6b795 578 fappend("-- Local Oscillator calibration data --\n\n");
f5eda47f 579 fappend("HW-power-control enabled: %d\n",
e4d6b795 580 dev->phy.hardware_power_control);
f5eda47f
MB		 581 fappend("TX Bias: 0x%02X, TX Magn: 0x%02X (expire in %lu sec)\n",
582 lo->tx_bias, lo->tx_magn,
583 calc_expire_secs(now, lo->txctl_measured_time,
584 B43_LO_TXCTL_EXPIRE));
585 fappend("Power Vector: 0x%08X%08X (expires in %lu sec)\n",
e4d6b795 586 (unsigned int)((lo->power_vector & 0xFFFFFFFF00000000ULL) >> 32),
f5eda47f
MB		 587 (unsigned int)(lo->power_vector & 0x00000000FFFFFFFFULL),
588 calc_expire_secs(now, lo->pwr_vec_read_time,
589 B43_LO_PWRVEC_EXPIRE));
590
591 fappend("\nCalibrated settings:\n");
592 list_for_each_entry(cal, &lo->calib_list, list) {
593 bool active;
594
595 active = (b43_compare_bbatt(&cal->bbatt, &phy->bbatt) &&
596 b43_compare_rfatt(&cal->rfatt, &phy->rfatt));
597 fappend("BB(%d), RF(%d,%d) -> I=%d, Q=%d "
598 "(expires in %lu sec)%s\n",
599 cal->bbatt.att,
600 cal->rfatt.att, cal->rfatt.with_padmix,
601 cal->ctl.i, cal->ctl.q,
602 calc_expire_secs(now, cal->calib_time,
603 B43_LO_CALIB_EXPIRE),
604 active ? " ACTIVE" : "");
605 }
606
e4d6b795
MB		 607 fappend("\nUsed RF attenuation values: Value(WithPadmix flag)\n");
608 for (i = 0; i < lo->rfatt_list.len; i++) {
609 fappend("%u(%d), ",
610 lo->rfatt_list.list[i].att,
611 lo->rfatt_list.list[i].with_padmix);
612 }
613 fappend("\n");
614 fappend("\nUsed Baseband attenuation values:\n");
615 for (i = 0; i < lo->bbatt_list.len; i++) {
616 fappend("%u, ",
617 lo->bbatt_list.list[i].att);
618 }
619 fappend("\n");
620
621out:
622 return err ? err : count;
623}
624
625#undef fappend
626
627static int b43_debugfs_open(struct inode *inode, struct file *file)
628{
629 file->private_data = inode->i_private;
630 return 0;
631}
632
633static ssize_t b43_debugfs_read(struct file *file, char __user *userbuf,
634 size_t count, loff_t *ppos)
635{
636 struct b43_wldev *dev;
637 struct b43_debugfs_fops *dfops;
638 struct b43_dfs_file *dfile;
7223e8d9 639 ssize_t uninitialized_var(ret);
e4d6b795 640 char *buf;
f5eda47f 641 const size_t bufsize = 1024 * 16; /* 16 kiB buffer */
e4d6b795
MB		 642 const size_t buforder = get_order(bufsize);
643 int err = 0;
644
645 if (!count)
646 return 0;
647 dev = file->private_data;
648 if (!dev)
649 return -ENODEV;
650
651 mutex_lock(&dev->wl->mutex);
652 if (b43_status(dev) < B43_STAT_INITIALIZED) {
653 err = -ENODEV;
654 goto out_unlock;
655 }
656
657 dfops = container_of(file->f_op, struct b43_debugfs_fops, fops);
658 if (!dfops->read) {
659 err = -ENOSYS;
660 goto out_unlock;
661 }
662 dfile = fops_to_dfs_file(dev, dfops);
663
664 if (!dfile->buffer) {
665 buf = (char *)__get_free_pages(GFP_KERNEL, buforder);
666 if (!buf) {
667 err = -ENOMEM;
668 goto out_unlock;
669 }
670 memset(buf, 0, bufsize);
671 if (dfops->take_irqlock) {
672 spin_lock_irq(&dev->wl->irq_lock);
673 ret = dfops->read(dev, buf, bufsize);
674 spin_unlock_irq(&dev->wl->irq_lock);
675 } else
676 ret = dfops->read(dev, buf, bufsize);
677 if (ret <= 0) {
678 free_pages((unsigned long)buf, buforder);
679 err = ret;
680 goto out_unlock;
681 }
682 dfile->data_len = ret;
683 dfile->buffer = buf;
684 }
685
686 ret = simple_read_from_buffer(userbuf, count, ppos,
687 dfile->buffer,
688 dfile->data_len);
689 if (*ppos >= dfile->data_len) {
690 free_pages((unsigned long)dfile->buffer, buforder);
691 dfile->buffer = NULL;
692 dfile->data_len = 0;
693 }
694out_unlock:
695 mutex_unlock(&dev->wl->mutex);
696
697 return err ? err : ret;
698}
699
700static ssize_t b43_debugfs_write(struct file *file,
701 const char __user *userbuf,
702 size_t count, loff_t *ppos)
703{
704 struct b43_wldev *dev;
705 struct b43_debugfs_fops *dfops;
706 char *buf;
707 int err = 0;
708
709 if (!count)
710 return 0;
711 if (count > PAGE_SIZE)
712 return -E2BIG;
713 dev = file->private_data;
714 if (!dev)
715 return -ENODEV;
716
717 mutex_lock(&dev->wl->mutex);
718 if (b43_status(dev) < B43_STAT_INITIALIZED) {
719 err = -ENODEV;
720 goto out_unlock;
721 }
722
723 dfops = container_of(file->f_op, struct b43_debugfs_fops, fops);
724 if (!dfops->write) {
725 err = -ENOSYS;
726 goto out_unlock;
727 }
728
729 buf = (char *)get_zeroed_page(GFP_KERNEL);
730 if (!buf) {
731 err = -ENOMEM;
732 goto out_unlock;
733 }
734 if (copy_from_user(buf, userbuf, count)) {
735 err = -EFAULT;
736 goto out_freepage;
737 }
738 if (dfops->take_irqlock) {
739 spin_lock_irq(&dev->wl->irq_lock);
740 err = dfops->write(dev, buf, count);
741 spin_unlock_irq(&dev->wl->irq_lock);
742 } else
743 err = dfops->write(dev, buf, count);
744 if (err)
745 goto out_freepage;
746
747out_freepage:
748 free_page((unsigned long)buf);
749out_unlock:
750 mutex_unlock(&dev->wl->mutex);
751
752 return err ? err : count;
753}
754
755
756#define B43_DEBUGFS_FOPS(name, _read, _write, _take_irqlock) \
757 static struct b43_debugfs_fops fops_##name = { \
758 .read = _read, \
759 .write = _write, \
760 .fops = { \
761 .open = b43_debugfs_open, \
762 .read = b43_debugfs_read, \
763 .write = b43_debugfs_write, \
764 }, \
765 .file_struct_offset = offsetof(struct b43_dfsentry, \
766 file_##name), \
767 .take_irqlock = _take_irqlock, \
768 }
769
6bbc321a
MB		 770B43_DEBUGFS_FOPS(shm16read, shm16read__read_file, shm16read__write_file, 1);
771B43_DEBUGFS_FOPS(shm16write, NULL, shm16write__write_file, 1);
772B43_DEBUGFS_FOPS(shm32read, shm32read__read_file, shm32read__write_file, 1);
773B43_DEBUGFS_FOPS(shm32write, NULL, shm32write__write_file, 1);
8bd463f4
MB		 774B43_DEBUGFS_FOPS(mmio16read, mmio16read__read_file, mmio16read__write_file, 1);
775B43_DEBUGFS_FOPS(mmio16write, NULL, mmio16write__write_file, 1);
776B43_DEBUGFS_FOPS(mmio32read, mmio32read__read_file, mmio32read__write_file, 1);
777B43_DEBUGFS_FOPS(mmio32write, NULL, mmio32write__write_file, 1);
e4d6b795
MB		 778B43_DEBUGFS_FOPS(tsf, tsf_read_file, tsf_write_file, 1);
779B43_DEBUGFS_FOPS(ucode_regs, ucode_regs_read_file, NULL, 1);
780B43_DEBUGFS_FOPS(shm, shm_read_file, NULL, 1);
781B43_DEBUGFS_FOPS(txstat, txstat_read_file, NULL, 0);
782B43_DEBUGFS_FOPS(txpower_g, txpower_g_read_file, txpower_g_write_file, 0);
783B43_DEBUGFS_FOPS(restart, NULL, restart_write_file, 1);
784B43_DEBUGFS_FOPS(loctls, loctls_read_file, NULL, 0);
785
786
787int b43_debug(struct b43_wldev *dev, enum b43_dyndbg feature)
788{
789 return !!(dev->dfsentry && dev->dfsentry->dyn_debug[feature]);
790}
791
792static void b43_remove_dynamic_debug(struct b43_wldev *dev)
793{
794 struct b43_dfsentry *e = dev->dfsentry;
795 int i;
796
797 for (i = 0; i < __B43_NR_DYNDBG; i++)
798 debugfs_remove(e->dyn_debug_dentries[i]);
799}
800
801static void b43_add_dynamic_debug(struct b43_wldev *dev)
802{
803 struct b43_dfsentry *e = dev->dfsentry;
804 struct dentry *d;
805
806#define add_dyn_dbg(name, id, initstate) do { \
807 e->dyn_debug[id] = (initstate); \
808 d = debugfs_create_bool(name, 0600, e->subdir, \
809 &(e->dyn_debug[id])); \
810 if (!IS_ERR(d)) \
811 e->dyn_debug_dentries[id] = d; \
812 } while (0)
813
814 add_dyn_dbg("debug_xmitpower", B43_DBG_XMITPOWER, 0);
815 add_dyn_dbg("debug_dmaoverflow", B43_DBG_DMAOVERFLOW, 0);
816 add_dyn_dbg("debug_dmaverbose", B43_DBG_DMAVERBOSE, 0);
817 add_dyn_dbg("debug_pwork_fast", B43_DBG_PWORK_FAST, 0);
818 add_dyn_dbg("debug_pwork_stop", B43_DBG_PWORK_STOP, 0);
f5eda47f 819 add_dyn_dbg("debug_lo", B43_DBG_LO, 0);
e4d6b795
MB		 820
821#undef add_dyn_dbg
822}
823
824void b43_debugfs_add_device(struct b43_wldev *dev)
825{
826 struct b43_dfsentry *e;
827 struct b43_txstatus_log *log;
828 char devdir[16];
829
830 B43_WARN_ON(!dev);
831 e = kzalloc(sizeof(*e), GFP_KERNEL);
832 if (!e) {
833 b43err(dev->wl, "debugfs: add device OOM\n");
834 return;
835 }
836 e->dev = dev;
837 log = &e->txstatlog;
838 log->log = kcalloc(B43_NR_LOGGED_TXSTATUS,
839 sizeof(struct b43_txstatus), GFP_KERNEL);
840 if (!log->log) {
841 b43err(dev->wl, "debugfs: add device txstatus OOM\n");
842 kfree(e);
843 return;
844 }
845 log->end = -1;
846 spin_lock_init(&log->lock);
847
848 dev->dfsentry = e;
849
850 snprintf(devdir, sizeof(devdir), "%s", wiphy_name(dev->wl->hw->wiphy));
851 e->subdir = debugfs_create_dir(devdir, rootdir);
852 if (!e->subdir || IS_ERR(e->subdir)) {
853 if (e->subdir == ERR_PTR(-ENODEV)) {
854 b43dbg(dev->wl, "DebugFS (CONFIG_DEBUG_FS) not "
855 "enabled in kernel config\n");
856 } else {
857 b43err(dev->wl, "debugfs: cannot create %s directory\n",
858 devdir);
859 }
860 dev->dfsentry = NULL;
861 kfree(log->log);
862 kfree(e);
863 return;
864 }
865
8bd463f4
MB		 866 e->mmio16read_next = 0xFFFF; /* invalid address */
867 e->mmio32read_next = 0xFFFF; /* invalid address */
6bbc321a
MB		 868 e->shm16read_routing_next = 0xFFFFFFFF; /* invalid routing */
869 e->shm16read_addr_next = 0xFFFFFFFF; /* invalid address */
870 e->shm32read_routing_next = 0xFFFFFFFF; /* invalid routing */
871 e->shm32read_addr_next = 0xFFFFFFFF; /* invalid address */
8bd463f4 872
e4d6b795
MB		 873#define ADD_FILE(name, mode) \
874 do { \
875 struct dentry *d; \
876 d = debugfs_create_file(__stringify(name), \
877 mode, e->subdir, dev, \
878 &fops_##name.fops); \
879 e->file_##name.dentry = NULL; \
880 if (!IS_ERR(d)) \
881 e->file_##name.dentry = d; \
882 } while (0)
883
884
6bbc321a
MB		 885 ADD_FILE(shm16read, 0600);
886 ADD_FILE(shm16write, 0200);
887 ADD_FILE(shm32read, 0600);
888 ADD_FILE(shm32write, 0200);
8bd463f4
MB		 889 ADD_FILE(mmio16read, 0600);
890 ADD_FILE(mmio16write, 0200);
891 ADD_FILE(mmio32read, 0600);
892 ADD_FILE(mmio32write, 0200);
e4d6b795
MB		 893 ADD_FILE(tsf, 0600);
894 ADD_FILE(ucode_regs, 0400);
895 ADD_FILE(shm, 0400);
896 ADD_FILE(txstat, 0400);
897 ADD_FILE(txpower_g, 0600);
898 ADD_FILE(restart, 0200);
899 ADD_FILE(loctls, 0400);
900
901#undef ADD_FILE
902
903 b43_add_dynamic_debug(dev);
904}
905
906void b43_debugfs_remove_device(struct b43_wldev *dev)
907{
908 struct b43_dfsentry *e;
909
910 if (!dev)
911 return;
912 e = dev->dfsentry;
913 if (!e)
914 return;
915 b43_remove_dynamic_debug(dev);
916
6bbc321a
MB		 917 debugfs_remove(e->file_shm16read.dentry);
918 debugfs_remove(e->file_shm16write.dentry);
919 debugfs_remove(e->file_shm32read.dentry);
920 debugfs_remove(e->file_shm32write.dentry);
8bd463f4
MB		 921 debugfs_remove(e->file_mmio16read.dentry);
922 debugfs_remove(e->file_mmio16write.dentry);
923 debugfs_remove(e->file_mmio32read.dentry);
924 debugfs_remove(e->file_mmio32write.dentry);
e4d6b795
MB		 925 debugfs_remove(e->file_tsf.dentry);
926 debugfs_remove(e->file_ucode_regs.dentry);
927 debugfs_remove(e->file_shm.dentry);
928 debugfs_remove(e->file_txstat.dentry);
929 debugfs_remove(e->file_txpower_g.dentry);
930 debugfs_remove(e->file_restart.dentry);
931 debugfs_remove(e->file_loctls.dentry);
932
933 debugfs_remove(e->subdir);
934 kfree(e->txstatlog.log);
935 kfree(e);
936}
937
7a193a5d 938/* Called with IRQs disabled. */
e4d6b795
MB		 939void b43_debugfs_log_txstat(struct b43_wldev *dev,
940 const struct b43_txstatus *status)
941{
942 struct b43_dfsentry *e = dev->dfsentry;
943 struct b43_txstatus_log *log;
944 struct b43_txstatus *cur;
945 int i;
946
947 if (!e)
948 return;
949 log = &e->txstatlog;
7a193a5d 950 spin_lock(&log->lock); /* IRQs are already disabled. */
e4d6b795
MB		 951 i = log->end + 1;
952 if (i == B43_NR_LOGGED_TXSTATUS)
953 i = 0;
954 log->end = i;
955 cur = &(log->log[i]);
956 memcpy(cur, status, sizeof(*cur));
957 spin_unlock(&log->lock);
958}
959
960void b43_debugfs_init(void)
961{
962 rootdir = debugfs_create_dir(KBUILD_MODNAME, NULL);
963 if (IS_ERR(rootdir))
964 rootdir = NULL;
965}
966
967void b43_debugfs_exit(void)
968{
969 debugfs_remove(rootdir);
970}
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