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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
42static struct dentry *rootdir;
43
44struct 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
49 size_t file_struct_offset;
50
51 bool take_irqlock;
52};
53
54static inline
55struct 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
79static 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
93static 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
105static 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
119static 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++) {
127 if (bufsize < sizeof(tmp))
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
138static 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 }
179out_unlock:
180 spin_unlock_irqrestore(&log->lock, flags);
181
182 return count;
183}
184
185
186static 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
200static ssize_t b43legacy_debugfs_read(struct file *file, char __user *userbuf,
201 size_t count, loff_t *ppos)
202{
203 struct b43legacy_wldev *dev;
204 struct b43legacy_debugfs_fops *dfops;
205 struct b43legacy_dfs_file *dfile;
206 ssize_t uninitialized_var(ret);
207 char *buf;
208 const size_t bufsize = 1024 * 16;
209 const size_t buforder = get_order(bufsize);
210 int err = 0;
211
212 if (!count)
213 return 0;
214 dev = file->private_data;
215 if (!dev)
216 return -ENODEV;
217
218 mutex_lock(&dev->wl->mutex);
219 if (b43legacy_status(dev) < B43legacy_STAT_INITIALIZED) {
220 err = -ENODEV;
221 goto out_unlock;
222 }
223
224 dfops = container_of(debugfs_real_fops(file),
225 struct b43legacy_debugfs_fops, fops);
226 if (!dfops->read) {
227 err = -ENOSYS;
228 goto out_unlock;
229 }
230 dfile = fops_to_dfs_file(dev, dfops);
231
232 if (!dfile->buffer) {
233 buf = (char *)__get_free_pages(GFP_KERNEL, buforder);
234 if (!buf) {
235 err = -ENOMEM;
236 goto out_unlock;
237 }
238 memset(buf, 0, bufsize);
239 if (dfops->take_irqlock) {
240 spin_lock_irq(&dev->wl->irq_lock);
241 ret = dfops->read(dev, buf, bufsize);
242 spin_unlock_irq(&dev->wl->irq_lock);
243 } else
244 ret = dfops->read(dev, buf, bufsize);
245 if (ret <= 0) {
246 free_pages((unsigned long)buf, buforder);
247 err = ret;
248 goto out_unlock;
249 }
250 dfile->data_len = ret;
251 dfile->buffer = buf;
252 }
253
254 ret = simple_read_from_buffer(userbuf, count, ppos,
255 dfile->buffer,
256 dfile->data_len);
257 if (*ppos >= dfile->data_len) {
258 free_pages((unsigned long)dfile->buffer, buforder);
259 dfile->buffer = NULL;
260 dfile->data_len = 0;
261 }
262out_unlock:
263 mutex_unlock(&dev->wl->mutex);
264
265 return err ? err : ret;
266}
267
268static ssize_t b43legacy_debugfs_write(struct file *file,
269 const char __user *userbuf,
270 size_t count, loff_t *ppos)
271{
272 struct b43legacy_wldev *dev;
273 struct b43legacy_debugfs_fops *dfops;
274 char *buf;
275 int err = 0;
276
277 if (!count)
278 return 0;
279 if (count > PAGE_SIZE)
280 return -E2BIG;
281 dev = file->private_data;
282 if (!dev)
283 return -ENODEV;
284
285 mutex_lock(&dev->wl->mutex);
286 if (b43legacy_status(dev) < B43legacy_STAT_INITIALIZED) {
287 err = -ENODEV;
288 goto out_unlock;
289 }
290
291 dfops = container_of(debugfs_real_fops(file),
292 struct b43legacy_debugfs_fops, fops);
293 if (!dfops->write) {
294 err = -ENOSYS;
295 goto out_unlock;
296 }
297
298 buf = (char *)get_zeroed_page(GFP_KERNEL);
299 if (!buf) {
300 err = -ENOMEM;
301 goto out_unlock;
302 }
303 if (copy_from_user(buf, userbuf, count)) {
304 err = -EFAULT;
305 goto out_freepage;
306 }
307 if (dfops->take_irqlock) {
308 spin_lock_irq(&dev->wl->irq_lock);
309 err = dfops->write(dev, buf, count);
310 spin_unlock_irq(&dev->wl->irq_lock);
311 } else
312 err = dfops->write(dev, buf, count);
313 if (err)
314 goto out_freepage;
315
316out_freepage:
317 free_page((unsigned long)buf);
318out_unlock:
319 mutex_unlock(&dev->wl->mutex);
320
321 return err ? err : count;
322}
323
324
325#define B43legacy_DEBUGFS_FOPS(name, _read, _write, _take_irqlock) \
326 static struct b43legacy_debugfs_fops fops_##name = { \
327 .read = _read, \
328 .write = _write, \
329 .fops = { \
330 .open = simple_open, \
331 .read = b43legacy_debugfs_read, \
332 .write = b43legacy_debugfs_write, \
333 .llseek = generic_file_llseek, \
334 }, \
335 .file_struct_offset = offsetof(struct b43legacy_dfsentry, \
336 file_##name), \
337 .take_irqlock = _take_irqlock, \
338 }
339
340B43legacy_DEBUGFS_FOPS(tsf, tsf_read_file, tsf_write_file, 1);
341B43legacy_DEBUGFS_FOPS(ucode_regs, ucode_regs_read_file, NULL, 1);
342B43legacy_DEBUGFS_FOPS(shm, shm_read_file, NULL, 1);
343B43legacy_DEBUGFS_FOPS(txstat, txstat_read_file, NULL, 0);
344B43legacy_DEBUGFS_FOPS(restart, NULL, restart_write_file, 1);
345
346
347int b43legacy_debug(struct b43legacy_wldev *dev, enum b43legacy_dyndbg feature)
348{
349 return !!(dev->dfsentry && dev->dfsentry->dyn_debug[feature]);
350}
351
352static void b43legacy_remove_dynamic_debug(struct b43legacy_wldev *dev)
353{
354 struct b43legacy_dfsentry *e = dev->dfsentry;
355 int i;
356
357 for (i = 0; i < __B43legacy_NR_DYNDBG; i++)
358 debugfs_remove(e->dyn_debug_dentries[i]);
359}
360
361static void b43legacy_add_dynamic_debug(struct b43legacy_wldev *dev)
362{
363 struct b43legacy_dfsentry *e = dev->dfsentry;
364 struct dentry *d;
365
366#define add_dyn_dbg(name, id, initstate) do { \
367 e->dyn_debug[id] = (initstate); \
368 d = debugfs_create_bool(name, 0600, e->subdir, \
369 &(e->dyn_debug[id])); \
370 if (!IS_ERR(d)) \
371 e->dyn_debug_dentries[id] = d; \
372 } while (0)
373
374 add_dyn_dbg("debug_xmitpower", B43legacy_DBG_XMITPOWER, false);
375 add_dyn_dbg("debug_dmaoverflow", B43legacy_DBG_DMAOVERFLOW, false);
376 add_dyn_dbg("debug_dmaverbose", B43legacy_DBG_DMAVERBOSE, false);
377 add_dyn_dbg("debug_pwork_fast", B43legacy_DBG_PWORK_FAST, false);
378 add_dyn_dbg("debug_pwork_stop", B43legacy_DBG_PWORK_STOP, false);
379
380#undef add_dyn_dbg
381}
382
383void b43legacy_debugfs_add_device(struct b43legacy_wldev *dev)
384{
385 struct b43legacy_dfsentry *e;
386 struct b43legacy_txstatus_log *log;
387 char devdir[16];
388
389 B43legacy_WARN_ON(!dev);
390 e = kzalloc(sizeof(*e), GFP_KERNEL);
391 if (!e) {
392 b43legacyerr(dev->wl, "debugfs: add device OOM\n");
393 return;
394 }
395 e->dev = dev;
396 log = &e->txstatlog;
397 log->log = kcalloc(B43legacy_NR_LOGGED_TXSTATUS,
398 sizeof(struct b43legacy_txstatus), GFP_KERNEL);
399 if (!log->log) {
400 b43legacyerr(dev->wl, "debugfs: add device txstatus OOM\n");
401 kfree(e);
402 return;
403 }
404 log->end = -1;
405 spin_lock_init(&log->lock);
406
407 dev->dfsentry = e;
408
409 snprintf(devdir, sizeof(devdir), "%s", wiphy_name(dev->wl->hw->wiphy));
410 e->subdir = debugfs_create_dir(devdir, rootdir);
411 if (!e->subdir || IS_ERR(e->subdir)) {
412 if (e->subdir == ERR_PTR(-ENODEV)) {
413 b43legacydbg(dev->wl, "DebugFS (CONFIG_DEBUG_FS) not "
414 "enabled in kernel config\n");
415 } else {
416 b43legacyerr(dev->wl, "debugfs: cannot create %s directory\n",
417 devdir);
418 }
419 dev->dfsentry = NULL;
420 kfree(log->log);
421 kfree(e);
422 return;
423 }
424
425#define ADD_FILE(name, mode) \
426 do { \
427 struct dentry *d; \
428 d = debugfs_create_file(__stringify(name), \
429 mode, e->subdir, dev, \
430 &fops_##name.fops); \
431 e->file_##name.dentry = NULL; \
432 if (!IS_ERR(d)) \
433 e->file_##name.dentry = d; \
434 } while (0)
435
436
437 ADD_FILE(tsf, 0600);
438 ADD_FILE(ucode_regs, 0400);
439 ADD_FILE(shm, 0400);
440 ADD_FILE(txstat, 0400);
441 ADD_FILE(restart, 0200);
442
443#undef ADD_FILE
444
445 b43legacy_add_dynamic_debug(dev);
446}
447
448void b43legacy_debugfs_remove_device(struct b43legacy_wldev *dev)
449{
450 struct b43legacy_dfsentry *e;
451
452 if (!dev)
453 return;
454 e = dev->dfsentry;
455 if (!e)
456 return;
457 b43legacy_remove_dynamic_debug(dev);
458
459 debugfs_remove(e->file_tsf.dentry);
460 debugfs_remove(e->file_ucode_regs.dentry);
461 debugfs_remove(e->file_shm.dentry);
462 debugfs_remove(e->file_txstat.dentry);
463 debugfs_remove(e->file_restart.dentry);
464
465 debugfs_remove(e->subdir);
466 kfree(e->txstatlog.log);
467 kfree(e);
468}
469
470void b43legacy_debugfs_log_txstat(struct b43legacy_wldev *dev,
471 const struct b43legacy_txstatus *status)
472{
473 struct b43legacy_dfsentry *e = dev->dfsentry;
474 struct b43legacy_txstatus_log *log;
475 struct b43legacy_txstatus *cur;
476 int i;
477
478 if (!e)
479 return;
480 log = &e->txstatlog;
481 B43legacy_WARN_ON(!irqs_disabled());
482 spin_lock(&log->lock);
483 i = log->end + 1;
484 if (i == B43legacy_NR_LOGGED_TXSTATUS)
485 i = 0;
486 log->end = i;
487 cur = &(log->log[i]);
488 memcpy(cur, status, sizeof(*cur));
489 spin_unlock(&log->lock);
490}
491
492void b43legacy_debugfs_init(void)
493{
494 rootdir = debugfs_create_dir(KBUILD_MODNAME, NULL);
495 if (IS_ERR(rootdir))
496 rootdir = NULL;
497}
498
499void b43legacy_debugfs_exit(void)
500{
501 debugfs_remove(rootdir);
502}
503
