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