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13#include <linux/fs.h>
14#include <linux/debugfs.h>
15#include <linux/slab.h>
16#include <linux/netdevice.h>
17#include <linux/pci.h>
18#include <linux/mutex.h>
19
20#include "b43legacy.h"
21#include "main.h"
22#include "debugfs.h"
23#include "dma.h"
24#include "pio.h"
25#include "xmit.h"
26
27
28
29static struct dentry *rootdir;
30
31struct b43legacy_debugfs_fops {
32 ssize_t (*read)(struct b43legacy_wldev *dev, char *buf, size_t bufsize);
33 int (*write)(struct b43legacy_wldev *dev, const char *buf, size_t count);
34 struct file_operations fops;
35
36 size_t file_struct_offset;
37
38 bool take_irqlock;
39};
40
41static inline
42struct b43legacy_dfs_file * fops_to_dfs_file(struct b43legacy_wldev *dev,
43 const struct b43legacy_debugfs_fops *dfops)
44{
45 void *p;
46
47 p = dev->dfsentry;
48 p += dfops->file_struct_offset;
49
50 return p;
51}
52
53
54#define fappend(fmt, x...) \
55 do { \
56 if (bufsize - count) \
57 count += snprintf(buf + count, \
58 bufsize - count, \
59 fmt , ##x); \
60 else \
61 printk(KERN_ERR "b43legacy: fappend overflow\n"); \
62 } while (0)
63
64
65
66static ssize_t tsf_read_file(struct b43legacy_wldev *dev, char *buf, size_t bufsize)
67{
68 ssize_t count = 0;
69 u64 tsf;
70
71 b43legacy_tsf_read(dev, &tsf);
72 fappend("0x%08x%08x\n",
73 (unsigned int)((tsf & 0xFFFFFFFF00000000ULL) >> 32),
74 (unsigned int)(tsf & 0xFFFFFFFFULL));
75
76 return count;
77}
78
79
80static int tsf_write_file(struct b43legacy_wldev *dev, const char *buf, size_t count)
81{
82 u64 tsf;
83
84 if (sscanf(buf, "%llu", (unsigned long long *)(&tsf)) != 1)
85 return -EINVAL;
86 b43legacy_tsf_write(dev, tsf);
87
88 return 0;
89}
90
91
92static ssize_t ucode_regs_read_file(struct b43legacy_wldev *dev, char *buf, size_t bufsize)
93{
94 ssize_t count = 0;
95 int i;
96
97 for (i = 0; i < 64; i++) {
98 fappend("r%d = 0x%04x\n", i,
99 b43legacy_shm_read16(dev, B43legacy_SHM_WIRELESS, i));
100 }
101
102 return count;
103}
104
105
106static ssize_t shm_read_file(struct b43legacy_wldev *dev, char *buf, size_t bufsize)
107{
108 ssize_t count = 0;
109 int i;
110 u16 tmp;
111 __le16 *le16buf = (__le16 *)buf;
112
113 for (i = 0; i < 0x1000; i++) {
114 if (bufsize < sizeof(tmp))
115 break;
116 tmp = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED, 2 * i);
117 le16buf[i] = cpu_to_le16(tmp);
118 count += sizeof(tmp);
119 bufsize -= sizeof(tmp);
120 }
121
122 return count;
123}
124
125static ssize_t txstat_read_file(struct b43legacy_wldev *dev, char *buf, size_t bufsize)
126{
127 struct b43legacy_txstatus_log *log = &dev->dfsentry->txstatlog;
128 ssize_t count = 0;
129 unsigned long flags;
130 int i, idx;
131 struct b43legacy_txstatus *stat;
132
133 spin_lock_irqsave(&log->lock, flags);
134 if (log->end < 0) {
135 fappend("Nothing transmitted, yet\n");
136 goto out_unlock;
137 }
138 fappend("b43legacy TX status reports:\n\n"
139 "index | cookie | seq | phy_stat | frame_count | "
140 "rts_count | supp_reason | pm_indicated | "
141 "intermediate | for_ampdu | acked\n" "---\n");
142 i = log->end + 1;
143 idx = 0;
144 while (1) {
145 if (i == B43legacy_NR_LOGGED_TXSTATUS)
146 i = 0;
147 stat = &(log->log[i]);
148 if (stat->cookie) {
149 fappend("%03d | "
150 "0x%04X | 0x%04X | 0x%02X | "
151 "0x%X | 0x%X | "
152 "%u | %u | "
153 "%u | %u | %u\n",
154 idx,
155 stat->cookie, stat->seq, stat->phy_stat,
156 stat->frame_count, stat->rts_count,
157 stat->supp_reason, stat->pm_indicated,
158 stat->intermediate, stat->for_ampdu,
159 stat->acked);
160 idx++;
161 }
162 if (i == log->end)
163 break;
164 i++;
165 }
166out_unlock:
167 spin_unlock_irqrestore(&log->lock, flags);
168
169 return count;
170}
171
172
173static int restart_write_file(struct b43legacy_wldev *dev, const char *buf, size_t count)
174{
175 int err = 0;
176
177 if (count > 0 && buf[0] == '1') {
178 b43legacy_controller_restart(dev, "manually restarted");
179 } else
180 err = -EINVAL;
181
182 return err;
183}
184
185#undef fappend
186
187static ssize_t b43legacy_debugfs_read(struct file *file, char __user *userbuf,
188 size_t count, loff_t *ppos)
189{
190 struct b43legacy_wldev *dev;
191 struct b43legacy_debugfs_fops *dfops;
192 struct b43legacy_dfs_file *dfile;
193 ssize_t uninitialized_var(ret);
194 char *buf;
195 const size_t bufsize = 1024 * 16;
196 const size_t buforder = get_order(bufsize);
197 int err = 0;
198
199 if (!count)
200 return 0;
201 dev = file->private_data;
202 if (!dev)
203 return -ENODEV;
204
205 mutex_lock(&dev->wl->mutex);
206 if (b43legacy_status(dev) < B43legacy_STAT_INITIALIZED) {
207 err = -ENODEV;
208 goto out_unlock;
209 }
210
211 dfops = container_of(debugfs_real_fops(file),
212 struct b43legacy_debugfs_fops, fops);
213 if (!dfops->read) {
214 err = -ENOSYS;
215 goto out_unlock;
216 }
217 dfile = fops_to_dfs_file(dev, dfops);
218
219 if (!dfile->buffer) {
220 buf = (char *)__get_free_pages(GFP_KERNEL, buforder);
221 if (!buf) {
222 err = -ENOMEM;
223 goto out_unlock;
224 }
225 memset(buf, 0, bufsize);
226 if (dfops->take_irqlock) {
227 spin_lock_irq(&dev->wl->irq_lock);
228 ret = dfops->read(dev, buf, bufsize);
229 spin_unlock_irq(&dev->wl->irq_lock);
230 } else
231 ret = dfops->read(dev, buf, bufsize);
232 if (ret <= 0) {
233 free_pages((unsigned long)buf, buforder);
234 err = ret;
235 goto out_unlock;
236 }
237 dfile->data_len = ret;
238 dfile->buffer = buf;
239 }
240
241 ret = simple_read_from_buffer(userbuf, count, ppos,
242 dfile->buffer,
243 dfile->data_len);
244 if (*ppos >= dfile->data_len) {
245 free_pages((unsigned long)dfile->buffer, buforder);
246 dfile->buffer = NULL;
247 dfile->data_len = 0;
248 }
249out_unlock:
250 mutex_unlock(&dev->wl->mutex);
251
252 return err ? err : ret;
253}
254
255static ssize_t b43legacy_debugfs_write(struct file *file,
256 const char __user *userbuf,
257 size_t count, loff_t *ppos)
258{
259 struct b43legacy_wldev *dev;
260 struct b43legacy_debugfs_fops *dfops;
261 char *buf;
262 int err = 0;
263
264 if (!count)
265 return 0;
266 if (count > PAGE_SIZE)
267 return -E2BIG;
268 dev = file->private_data;
269 if (!dev)
270 return -ENODEV;
271
272 mutex_lock(&dev->wl->mutex);
273 if (b43legacy_status(dev) < B43legacy_STAT_INITIALIZED) {
274 err = -ENODEV;
275 goto out_unlock;
276 }
277
278 dfops = container_of(debugfs_real_fops(file),
279 struct b43legacy_debugfs_fops, fops);
280 if (!dfops->write) {
281 err = -ENOSYS;
282 goto out_unlock;
283 }
284
285 buf = (char *)get_zeroed_page(GFP_KERNEL);
286 if (!buf) {
287 err = -ENOMEM;
288 goto out_unlock;
289 }
290 if (copy_from_user(buf, userbuf, count)) {
291 err = -EFAULT;
292 goto out_freepage;
293 }
294 if (dfops->take_irqlock) {
295 spin_lock_irq(&dev->wl->irq_lock);
296 err = dfops->write(dev, buf, count);
297 spin_unlock_irq(&dev->wl->irq_lock);
298 } else
299 err = dfops->write(dev, buf, count);
300 if (err)
301 goto out_freepage;
302
303out_freepage:
304 free_page((unsigned long)buf);
305out_unlock:
306 mutex_unlock(&dev->wl->mutex);
307
308 return err ? err : count;
309}
310
311
312#define B43legacy_DEBUGFS_FOPS(name, _read, _write, _take_irqlock) \
313 static struct b43legacy_debugfs_fops fops_##name = { \
314 .read = _read, \
315 .write = _write, \
316 .fops = { \
317 .open = simple_open, \
318 .read = b43legacy_debugfs_read, \
319 .write = b43legacy_debugfs_write, \
320 .llseek = generic_file_llseek, \
321 }, \
322 .file_struct_offset = offsetof(struct b43legacy_dfsentry, \
323 file_##name), \
324 .take_irqlock = _take_irqlock, \
325 }
326
327B43legacy_DEBUGFS_FOPS(tsf, tsf_read_file, tsf_write_file, 1);
328B43legacy_DEBUGFS_FOPS(ucode_regs, ucode_regs_read_file, NULL, 1);
329B43legacy_DEBUGFS_FOPS(shm, shm_read_file, NULL, 1);
330B43legacy_DEBUGFS_FOPS(txstat, txstat_read_file, NULL, 0);
331B43legacy_DEBUGFS_FOPS(restart, NULL, restart_write_file, 1);
332
333
334int b43legacy_debug(struct b43legacy_wldev *dev, enum b43legacy_dyndbg feature)
335{
336 return !!(dev->dfsentry && dev->dfsentry->dyn_debug[feature]);
337}
338
339static void b43legacy_remove_dynamic_debug(struct b43legacy_wldev *dev)
340{
341 struct b43legacy_dfsentry *e = dev->dfsentry;
342 int i;
343
344 for (i = 0; i < __B43legacy_NR_DYNDBG; i++)
345 debugfs_remove(e->dyn_debug_dentries[i]);
346}
347
348static void b43legacy_add_dynamic_debug(struct b43legacy_wldev *dev)
349{
350 struct b43legacy_dfsentry *e = dev->dfsentry;
351
352#define add_dyn_dbg(name, id, initstate) do { \
353 e->dyn_debug[id] = (initstate); \
354 e->dyn_debug_dentries[id] = \
355 debugfs_create_bool(name, 0600, e->subdir, \
356 &(e->dyn_debug[id])); \
357 } while (0)
358
359 add_dyn_dbg("debug_xmitpower", B43legacy_DBG_XMITPOWER, false);
360 add_dyn_dbg("debug_dmaoverflow", B43legacy_DBG_DMAOVERFLOW, false);
361 add_dyn_dbg("debug_dmaverbose", B43legacy_DBG_DMAVERBOSE, false);
362 add_dyn_dbg("debug_pwork_fast", B43legacy_DBG_PWORK_FAST, false);
363 add_dyn_dbg("debug_pwork_stop", B43legacy_DBG_PWORK_STOP, false);
364
365#undef add_dyn_dbg
366}
367
368void b43legacy_debugfs_add_device(struct b43legacy_wldev *dev)
369{
370 struct b43legacy_dfsentry *e;
371 struct b43legacy_txstatus_log *log;
372 char devdir[16];
373
374 B43legacy_WARN_ON(!dev);
375 e = kzalloc(sizeof(*e), GFP_KERNEL);
376 if (!e) {
377 b43legacyerr(dev->wl, "debugfs: add device OOM\n");
378 return;
379 }
380 e->dev = dev;
381 log = &e->txstatlog;
382 log->log = kcalloc(B43legacy_NR_LOGGED_TXSTATUS,
383 sizeof(struct b43legacy_txstatus), GFP_KERNEL);
384 if (!log->log) {
385 b43legacyerr(dev->wl, "debugfs: add device txstatus OOM\n");
386 kfree(e);
387 return;
388 }
389 log->end = -1;
390 spin_lock_init(&log->lock);
391
392 dev->dfsentry = e;
393
394 snprintf(devdir, sizeof(devdir), "%s", wiphy_name(dev->wl->hw->wiphy));
395 e->subdir = debugfs_create_dir(devdir, rootdir);
396
397#define ADD_FILE(name, mode) \
398 do { \
399 e->file_##name.dentry = \
400 debugfs_create_file(__stringify(name), \
401 mode, e->subdir, dev, \
402 &fops_##name.fops); \
403 e->file_##name.dentry = NULL; \
404 } while (0)
405
406
407 ADD_FILE(tsf, 0600);
408 ADD_FILE(ucode_regs, 0400);
409 ADD_FILE(shm, 0400);
410 ADD_FILE(txstat, 0400);
411 ADD_FILE(restart, 0200);
412
413#undef ADD_FILE
414
415 b43legacy_add_dynamic_debug(dev);
416}
417
418void b43legacy_debugfs_remove_device(struct b43legacy_wldev *dev)
419{
420 struct b43legacy_dfsentry *e;
421
422 if (!dev)
423 return;
424 e = dev->dfsentry;
425 if (!e)
426 return;
427 b43legacy_remove_dynamic_debug(dev);
428
429 debugfs_remove(e->file_tsf.dentry);
430 debugfs_remove(e->file_ucode_regs.dentry);
431 debugfs_remove(e->file_shm.dentry);
432 debugfs_remove(e->file_txstat.dentry);
433 debugfs_remove(e->file_restart.dentry);
434
435 debugfs_remove(e->subdir);
436 kfree(e->txstatlog.log);
437 kfree(e);
438}
439
440void b43legacy_debugfs_log_txstat(struct b43legacy_wldev *dev,
441 const struct b43legacy_txstatus *status)
442{
443 struct b43legacy_dfsentry *e = dev->dfsentry;
444 struct b43legacy_txstatus_log *log;
445 struct b43legacy_txstatus *cur;
446 int i;
447
448 if (!e)
449 return;
450 log = &e->txstatlog;
451 B43legacy_WARN_ON(!irqs_disabled());
452 spin_lock(&log->lock);
453 i = log->end + 1;
454 if (i == B43legacy_NR_LOGGED_TXSTATUS)
455 i = 0;
456 log->end = i;
457 cur = &(log->log[i]);
458 memcpy(cur, status, sizeof(*cur));
459 spin_unlock(&log->lock);
460}
461
462void b43legacy_debugfs_init(void)
463{
464 rootdir = debugfs_create_dir(KBUILD_MODNAME, NULL);
465}
466
467void b43legacy_debugfs_exit(void)
468{
469 debugfs_remove(rootdir);
470}
471
