Commit | Line | Data |
---|---|---|
75388acd LF |
1 | /* |
2 | ||
3 | Broadcom B43legacy wireless driver | |
4 | ||
5 | debugfs driver debugging code | |
6 | ||
eb032b98 | 7 | Copyright (c) 2005-2007 Michael Buesch <m@bues.ch> |
75388acd LF |
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 "b43legacy.h" | |
34 | #include "main.h" | |
35 | #include "debugfs.h" | |
36 | #include "dma.h" | |
37 | #include "pio.h" | |
38 | #include "xmit.h" | |
39 | ||
40 | ||
41 | /* The root directory. */ | |
42 | static struct dentry *rootdir; | |
43 | ||
44 | struct b43legacy_debugfs_fops { | |
45 | ssize_t (*read)(struct b43legacy_wldev *dev, char *buf, size_t bufsize); | |
46 | int (*write)(struct b43legacy_wldev *dev, const char *buf, size_t count); | |
47 | struct file_operations fops; | |
48 | /* Offset of struct b43legacy_dfs_file in struct b43legacy_dfsentry */ | |
49 | size_t file_struct_offset; | |
50 | /* Take wl->irq_lock before calling read/write? */ | |
51 | bool take_irqlock; | |
52 | }; | |
53 | ||
54 | static inline | |
55 | struct b43legacy_dfs_file * fops_to_dfs_file(struct b43legacy_wldev *dev, | |
56 | const struct b43legacy_debugfs_fops *dfops) | |
57 | { | |
58 | void *p; | |
59 | ||
60 | p = dev->dfsentry; | |
61 | p += dfops->file_struct_offset; | |
62 | ||
63 | return p; | |
64 | } | |
65 | ||
66 | ||
67 | #define fappend(fmt, x...) \ | |
68 | do { \ | |
69 | if (bufsize - count) \ | |
70 | count += snprintf(buf + count, \ | |
71 | bufsize - count, \ | |
72 | fmt , ##x); \ | |
73 | else \ | |
74 | printk(KERN_ERR "b43legacy: fappend overflow\n"); \ | |
75 | } while (0) | |
76 | ||
77 | ||
78 | /* wl->irq_lock is locked */ | |
79 | static ssize_t tsf_read_file(struct b43legacy_wldev *dev, char *buf, size_t bufsize) | |
80 | { | |
81 | ssize_t count = 0; | |
82 | u64 tsf; | |
83 | ||
84 | b43legacy_tsf_read(dev, &tsf); | |
85 | fappend("0x%08x%08x\n", | |
86 | (unsigned int)((tsf & 0xFFFFFFFF00000000ULL) >> 32), | |
87 | (unsigned int)(tsf & 0xFFFFFFFFULL)); | |
88 | ||
89 | return count; | |
90 | } | |
91 | ||
92 | /* wl->irq_lock is locked */ | |
93 | static int tsf_write_file(struct b43legacy_wldev *dev, const char *buf, size_t count) | |
94 | { | |
95 | u64 tsf; | |
96 | ||
97 | if (sscanf(buf, "%llu", (unsigned long long *)(&tsf)) != 1) | |
98 | return -EINVAL; | |
99 | b43legacy_tsf_write(dev, tsf); | |
100 | ||
101 | return 0; | |
102 | } | |
103 | ||
104 | /* wl->irq_lock is locked */ | |
105 | static ssize_t ucode_regs_read_file(struct b43legacy_wldev *dev, char *buf, size_t bufsize) | |
106 | { | |
107 | ssize_t count = 0; | |
108 | int i; | |
109 | ||
110 | for (i = 0; i < 64; i++) { | |
111 | fappend("r%d = 0x%04x\n", i, | |
112 | b43legacy_shm_read16(dev, B43legacy_SHM_WIRELESS, i)); | |
113 | } | |
114 | ||
115 | return count; | |
116 | } | |
117 | ||
118 | /* wl->irq_lock is locked */ | |
119 | static ssize_t shm_read_file(struct b43legacy_wldev *dev, char *buf, size_t bufsize) | |
120 | { | |
121 | ssize_t count = 0; | |
122 | int i; | |
123 | u16 tmp; | |
124 | __le16 *le16buf = (__le16 *)buf; | |
125 | ||
126 | for (i = 0; i < 0x1000; i++) { | |
187a9dca | 127 | if (bufsize < sizeof(tmp)) |
75388acd LF |
128 | break; |
129 | tmp = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED, 2 * i); | |
130 | le16buf[i] = cpu_to_le16(tmp); | |
131 | count += sizeof(tmp); | |
132 | bufsize -= sizeof(tmp); | |
133 | } | |
134 | ||
135 | return count; | |
136 | } | |
137 | ||
138 | static ssize_t txstat_read_file(struct b43legacy_wldev *dev, char *buf, size_t bufsize) | |
139 | { | |
140 | struct b43legacy_txstatus_log *log = &dev->dfsentry->txstatlog; | |
141 | ssize_t count = 0; | |
142 | unsigned long flags; | |
143 | int i, idx; | |
144 | struct b43legacy_txstatus *stat; | |
145 | ||
146 | spin_lock_irqsave(&log->lock, flags); | |
147 | if (log->end < 0) { | |
148 | fappend("Nothing transmitted, yet\n"); | |
149 | goto out_unlock; | |
150 | } | |
151 | fappend("b43legacy TX status reports:\n\n" | |
152 | "index | cookie | seq | phy_stat | frame_count | " | |
153 | "rts_count | supp_reason | pm_indicated | " | |
154 | "intermediate | for_ampdu | acked\n" "---\n"); | |
155 | i = log->end + 1; | |
156 | idx = 0; | |
157 | while (1) { | |
158 | if (i == B43legacy_NR_LOGGED_TXSTATUS) | |
159 | i = 0; | |
160 | stat = &(log->log[i]); | |
161 | if (stat->cookie) { | |
162 | fappend("%03d | " | |
163 | "0x%04X | 0x%04X | 0x%02X | " | |
164 | "0x%X | 0x%X | " | |
165 | "%u | %u | " | |
166 | "%u | %u | %u\n", | |
167 | idx, | |
168 | stat->cookie, stat->seq, stat->phy_stat, | |
169 | stat->frame_count, stat->rts_count, | |
170 | stat->supp_reason, stat->pm_indicated, | |
171 | stat->intermediate, stat->for_ampdu, | |
172 | stat->acked); | |
173 | idx++; | |
174 | } | |
175 | if (i == log->end) | |
176 | break; | |
177 | i++; | |
178 | } | |
179 | out_unlock: | |
180 | spin_unlock_irqrestore(&log->lock, flags); | |
181 | ||
182 | return count; | |
183 | } | |
184 | ||
185 | /* wl->irq_lock is locked */ | |
186 | static int restart_write_file(struct b43legacy_wldev *dev, const char *buf, size_t count) | |
187 | { | |
188 | int err = 0; | |
189 | ||
190 | if (count > 0 && buf[0] == '1') { | |
191 | b43legacy_controller_restart(dev, "manually restarted"); | |
192 | } else | |
193 | err = -EINVAL; | |
194 | ||
195 | return err; | |
196 | } | |
197 | ||
198 | #undef fappend | |
199 | ||
200 | static int b43legacy_debugfs_open(struct inode *inode, struct file *file) | |
201 | { | |
202 | file->private_data = inode->i_private; | |
203 | return 0; | |
204 | } | |
205 | ||
206 | static ssize_t b43legacy_debugfs_read(struct file *file, char __user *userbuf, | |
207 | size_t count, loff_t *ppos) | |
208 | { | |
209 | struct b43legacy_wldev *dev; | |
210 | struct b43legacy_debugfs_fops *dfops; | |
211 | struct b43legacy_dfs_file *dfile; | |
125c5cc2 | 212 | ssize_t uninitialized_var(ret); |
75388acd | 213 | char *buf; |
d8004cb9 | 214 | const size_t bufsize = 1024 * 16; /* 16 KiB buffer */ |
75388acd LF |
215 | const size_t buforder = get_order(bufsize); |
216 | int err = 0; | |
217 | ||
218 | if (!count) | |
219 | return 0; | |
220 | dev = file->private_data; | |
221 | if (!dev) | |
222 | return -ENODEV; | |
223 | ||
224 | mutex_lock(&dev->wl->mutex); | |
225 | if (b43legacy_status(dev) < B43legacy_STAT_INITIALIZED) { | |
226 | err = -ENODEV; | |
227 | goto out_unlock; | |
228 | } | |
229 | ||
230 | dfops = container_of(file->f_op, struct b43legacy_debugfs_fops, fops); | |
231 | if (!dfops->read) { | |
232 | err = -ENOSYS; | |
233 | goto out_unlock; | |
234 | } | |
235 | dfile = fops_to_dfs_file(dev, dfops); | |
236 | ||
237 | if (!dfile->buffer) { | |
238 | buf = (char *)__get_free_pages(GFP_KERNEL, buforder); | |
239 | if (!buf) { | |
240 | err = -ENOMEM; | |
241 | goto out_unlock; | |
242 | } | |
243 | memset(buf, 0, bufsize); | |
244 | if (dfops->take_irqlock) { | |
245 | spin_lock_irq(&dev->wl->irq_lock); | |
246 | ret = dfops->read(dev, buf, bufsize); | |
247 | spin_unlock_irq(&dev->wl->irq_lock); | |
248 | } else | |
249 | ret = dfops->read(dev, buf, bufsize); | |
250 | if (ret <= 0) { | |
251 | free_pages((unsigned long)buf, buforder); | |
252 | err = ret; | |
253 | goto out_unlock; | |
254 | } | |
255 | dfile->data_len = ret; | |
256 | dfile->buffer = buf; | |
257 | } | |
258 | ||
259 | ret = simple_read_from_buffer(userbuf, count, ppos, | |
260 | dfile->buffer, | |
261 | dfile->data_len); | |
262 | if (*ppos >= dfile->data_len) { | |
263 | free_pages((unsigned long)dfile->buffer, buforder); | |
264 | dfile->buffer = NULL; | |
265 | dfile->data_len = 0; | |
266 | } | |
267 | out_unlock: | |
268 | mutex_unlock(&dev->wl->mutex); | |
269 | ||
270 | return err ? err : ret; | |
271 | } | |
272 | ||
273 | static ssize_t b43legacy_debugfs_write(struct file *file, | |
274 | const char __user *userbuf, | |
275 | size_t count, loff_t *ppos) | |
276 | { | |
277 | struct b43legacy_wldev *dev; | |
278 | struct b43legacy_debugfs_fops *dfops; | |
279 | char *buf; | |
280 | int err = 0; | |
281 | ||
282 | if (!count) | |
283 | return 0; | |
284 | if (count > PAGE_SIZE) | |
285 | return -E2BIG; | |
286 | dev = file->private_data; | |
287 | if (!dev) | |
288 | return -ENODEV; | |
289 | ||
290 | mutex_lock(&dev->wl->mutex); | |
291 | if (b43legacy_status(dev) < B43legacy_STAT_INITIALIZED) { | |
292 | err = -ENODEV; | |
293 | goto out_unlock; | |
294 | } | |
295 | ||
296 | dfops = container_of(file->f_op, struct b43legacy_debugfs_fops, fops); | |
297 | if (!dfops->write) { | |
298 | err = -ENOSYS; | |
299 | goto out_unlock; | |
300 | } | |
301 | ||
302 | buf = (char *)get_zeroed_page(GFP_KERNEL); | |
303 | if (!buf) { | |
304 | err = -ENOMEM; | |
305 | goto out_unlock; | |
306 | } | |
307 | if (copy_from_user(buf, userbuf, count)) { | |
308 | err = -EFAULT; | |
309 | goto out_freepage; | |
310 | } | |
311 | if (dfops->take_irqlock) { | |
312 | spin_lock_irq(&dev->wl->irq_lock); | |
313 | err = dfops->write(dev, buf, count); | |
314 | spin_unlock_irq(&dev->wl->irq_lock); | |
315 | } else | |
316 | err = dfops->write(dev, buf, count); | |
317 | if (err) | |
318 | goto out_freepage; | |
319 | ||
320 | out_freepage: | |
321 | free_page((unsigned long)buf); | |
322 | out_unlock: | |
323 | mutex_unlock(&dev->wl->mutex); | |
324 | ||
325 | return err ? err : count; | |
326 | } | |
327 | ||
328 | ||
329 | #define B43legacy_DEBUGFS_FOPS(name, _read, _write, _take_irqlock) \ | |
330 | static struct b43legacy_debugfs_fops fops_##name = { \ | |
331 | .read = _read, \ | |
332 | .write = _write, \ | |
333 | .fops = { \ | |
334 | .open = b43legacy_debugfs_open, \ | |
335 | .read = b43legacy_debugfs_read, \ | |
336 | .write = b43legacy_debugfs_write, \ | |
2b18ab36 | 337 | .llseek = generic_file_llseek, \ |
75388acd LF |
338 | }, \ |
339 | .file_struct_offset = offsetof(struct b43legacy_dfsentry, \ | |
340 | file_##name), \ | |
341 | .take_irqlock = _take_irqlock, \ | |
342 | } | |
343 | ||
344 | B43legacy_DEBUGFS_FOPS(tsf, tsf_read_file, tsf_write_file, 1); | |
345 | B43legacy_DEBUGFS_FOPS(ucode_regs, ucode_regs_read_file, NULL, 1); | |
346 | B43legacy_DEBUGFS_FOPS(shm, shm_read_file, NULL, 1); | |
347 | B43legacy_DEBUGFS_FOPS(txstat, txstat_read_file, NULL, 0); | |
348 | B43legacy_DEBUGFS_FOPS(restart, NULL, restart_write_file, 1); | |
349 | ||
350 | ||
351 | int b43legacy_debug(struct b43legacy_wldev *dev, enum b43legacy_dyndbg feature) | |
352 | { | |
353 | return !!(dev->dfsentry && dev->dfsentry->dyn_debug[feature]); | |
354 | } | |
355 | ||
356 | static void b43legacy_remove_dynamic_debug(struct b43legacy_wldev *dev) | |
357 | { | |
358 | struct b43legacy_dfsentry *e = dev->dfsentry; | |
359 | int i; | |
360 | ||
361 | for (i = 0; i < __B43legacy_NR_DYNDBG; i++) | |
362 | debugfs_remove(e->dyn_debug_dentries[i]); | |
363 | } | |
364 | ||
365 | static void b43legacy_add_dynamic_debug(struct b43legacy_wldev *dev) | |
366 | { | |
367 | struct b43legacy_dfsentry *e = dev->dfsentry; | |
368 | struct dentry *d; | |
369 | ||
370 | #define add_dyn_dbg(name, id, initstate) do { \ | |
371 | e->dyn_debug[id] = (initstate); \ | |
372 | d = debugfs_create_bool(name, 0600, e->subdir, \ | |
373 | &(e->dyn_debug[id])); \ | |
374 | if (!IS_ERR(d)) \ | |
375 | e->dyn_debug_dentries[id] = d; \ | |
376 | } while (0) | |
377 | ||
378 | add_dyn_dbg("debug_xmitpower", B43legacy_DBG_XMITPOWER, 0); | |
379 | add_dyn_dbg("debug_dmaoverflow", B43legacy_DBG_DMAOVERFLOW, 0); | |
380 | add_dyn_dbg("debug_dmaverbose", B43legacy_DBG_DMAVERBOSE, 0); | |
381 | add_dyn_dbg("debug_pwork_fast", B43legacy_DBG_PWORK_FAST, 0); | |
382 | add_dyn_dbg("debug_pwork_stop", B43legacy_DBG_PWORK_STOP, 0); | |
383 | ||
384 | #undef add_dyn_dbg | |
385 | } | |
386 | ||
387 | void b43legacy_debugfs_add_device(struct b43legacy_wldev *dev) | |
388 | { | |
389 | struct b43legacy_dfsentry *e; | |
390 | struct b43legacy_txstatus_log *log; | |
391 | char devdir[16]; | |
392 | ||
393 | B43legacy_WARN_ON(!dev); | |
394 | e = kzalloc(sizeof(*e), GFP_KERNEL); | |
395 | if (!e) { | |
396 | b43legacyerr(dev->wl, "debugfs: add device OOM\n"); | |
397 | return; | |
398 | } | |
399 | e->dev = dev; | |
400 | log = &e->txstatlog; | |
401 | log->log = kcalloc(B43legacy_NR_LOGGED_TXSTATUS, | |
402 | sizeof(struct b43legacy_txstatus), GFP_KERNEL); | |
403 | if (!log->log) { | |
404 | b43legacyerr(dev->wl, "debugfs: add device txstatus OOM\n"); | |
405 | kfree(e); | |
406 | return; | |
407 | } | |
408 | log->end = -1; | |
409 | spin_lock_init(&log->lock); | |
410 | ||
411 | dev->dfsentry = e; | |
412 | ||
413 | snprintf(devdir, sizeof(devdir), "%s", wiphy_name(dev->wl->hw->wiphy)); | |
414 | e->subdir = debugfs_create_dir(devdir, rootdir); | |
415 | if (!e->subdir || IS_ERR(e->subdir)) { | |
416 | if (e->subdir == ERR_PTR(-ENODEV)) { | |
417 | b43legacydbg(dev->wl, "DebugFS (CONFIG_DEBUG_FS) not " | |
418 | "enabled in kernel config\n"); | |
419 | } else { | |
420 | b43legacyerr(dev->wl, "debugfs: cannot create %s directory\n", | |
421 | devdir); | |
422 | } | |
423 | dev->dfsentry = NULL; | |
424 | kfree(log->log); | |
425 | kfree(e); | |
426 | return; | |
427 | } | |
428 | ||
429 | #define ADD_FILE(name, mode) \ | |
430 | do { \ | |
431 | struct dentry *d; \ | |
432 | d = debugfs_create_file(__stringify(name), \ | |
433 | mode, e->subdir, dev, \ | |
434 | &fops_##name.fops); \ | |
435 | e->file_##name.dentry = NULL; \ | |
436 | if (!IS_ERR(d)) \ | |
437 | e->file_##name.dentry = d; \ | |
438 | } while (0) | |
439 | ||
440 | ||
441 | ADD_FILE(tsf, 0600); | |
442 | ADD_FILE(ucode_regs, 0400); | |
443 | ADD_FILE(shm, 0400); | |
444 | ADD_FILE(txstat, 0400); | |
445 | ADD_FILE(restart, 0200); | |
446 | ||
447 | #undef ADD_FILE | |
448 | ||
449 | b43legacy_add_dynamic_debug(dev); | |
450 | } | |
451 | ||
452 | void b43legacy_debugfs_remove_device(struct b43legacy_wldev *dev) | |
453 | { | |
454 | struct b43legacy_dfsentry *e; | |
455 | ||
456 | if (!dev) | |
457 | return; | |
458 | e = dev->dfsentry; | |
459 | if (!e) | |
460 | return; | |
461 | b43legacy_remove_dynamic_debug(dev); | |
462 | ||
463 | debugfs_remove(e->file_tsf.dentry); | |
464 | debugfs_remove(e->file_ucode_regs.dentry); | |
465 | debugfs_remove(e->file_shm.dentry); | |
466 | debugfs_remove(e->file_txstat.dentry); | |
467 | debugfs_remove(e->file_restart.dentry); | |
468 | ||
469 | debugfs_remove(e->subdir); | |
470 | kfree(e->txstatlog.log); | |
471 | kfree(e); | |
472 | } | |
473 | ||
474 | void b43legacy_debugfs_log_txstat(struct b43legacy_wldev *dev, | |
475 | const struct b43legacy_txstatus *status) | |
476 | { | |
477 | struct b43legacy_dfsentry *e = dev->dfsentry; | |
478 | struct b43legacy_txstatus_log *log; | |
479 | struct b43legacy_txstatus *cur; | |
480 | int i; | |
481 | ||
482 | if (!e) | |
483 | return; | |
484 | log = &e->txstatlog; | |
485 | B43legacy_WARN_ON(!irqs_disabled()); | |
486 | spin_lock(&log->lock); | |
487 | i = log->end + 1; | |
488 | if (i == B43legacy_NR_LOGGED_TXSTATUS) | |
489 | i = 0; | |
490 | log->end = i; | |
491 | cur = &(log->log[i]); | |
492 | memcpy(cur, status, sizeof(*cur)); | |
493 | spin_unlock(&log->lock); | |
494 | } | |
495 | ||
496 | void b43legacy_debugfs_init(void) | |
497 | { | |
498 | rootdir = debugfs_create_dir(KBUILD_MODNAME, NULL); | |
499 | if (IS_ERR(rootdir)) | |
500 | rootdir = NULL; | |
501 | } | |
502 | ||
503 | void b43legacy_debugfs_exit(void) | |
504 | { | |
505 | debugfs_remove(rootdir); | |
506 | } |