summaryrefslogtreecommitdiffstats
path: root/drivers/char/drm/drm_proc.c
blob: 6e06e8c6a51676222027317d3cee98ac168e9a73 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
/**
 * \file drm_proc.h 
 * /proc support for DRM
 *
 * \author Rickard E. (Rik) Faith <faith@valinux.com>
 * \author Gareth Hughes <gareth@valinux.com>
 *
 * \par Acknowledgements:
 *    Matthew J Sottek <matthew.j.sottek@intel.com> sent in a patch to fix
 *    the problem with the proc files not outputting all their information.
 */

/*
 * Created: Mon Jan 11 09:48:47 1999 by faith@valinux.com
 *
 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */

#include "drmP.h"

static int	   drm_name_info(char *buf, char **start, off_t offset,
				  int request, int *eof, void *data);
static int	   drm_vm_info(char *buf, char **start, off_t offset,
				int request, int *eof, void *data);
static int	   drm_clients_info(char *buf, char **start, off_t offset,
				     int request, int *eof, void *data);
static int	   drm_queues_info(char *buf, char **start, off_t offset,
				    int request, int *eof, void *data);
static int	   drm_bufs_info(char *buf, char **start, off_t offset,
				  int request, int *eof, void *data);
#if DRM_DEBUG_CODE
static int	   drm_vma_info(char *buf, char **start, off_t offset,
				 int request, int *eof, void *data);
#endif

/**
 * Proc file list.
 */
struct drm_proc_list {
	const char *name;	/**< file name */
	int	   (*f)(char *, char **, off_t, int, int *, void *);	/**< proc callback*/
} drm_proc_list[] = {
	{ "name",    drm_name_info    },
	{ "mem",     drm_mem_info     },
	{ "vm",	     drm_vm_info      },
	{ "clients", drm_clients_info },
	{ "queues",  drm_queues_info  },
	{ "bufs",    drm_bufs_info    },
#if DRM_DEBUG_CODE
	{ "vma",     drm_vma_info     },
#endif
};
#define DRM_PROC_ENTRIES (sizeof(drm_proc_list)/sizeof(drm_proc_list[0]))

/**
 * Initialize the DRI proc filesystem for a device.
 *
 * \param dev DRM device.
 * \param minor device minor number.
 * \param root DRI proc dir entry.
 * \param dev_root resulting DRI device proc dir entry.
 * \return root entry pointer on success, or NULL on failure.
 * 
 * Create the DRI proc root entry "/proc/dri", the device proc root entry
 * "/proc/dri/%minor%/", and each entry in proc_list as
 * "/proc/dri/%minor%/%name%".
 */
int drm_proc_init(drm_device_t *dev, int minor,
		    struct proc_dir_entry *root,
		    struct proc_dir_entry **dev_root)
{
	struct proc_dir_entry *ent;
	int		      i, j;
	char                  name[64];

	sprintf(name, "%d", minor);
	*dev_root = create_proc_entry(name, S_IFDIR, root);
	if (!*dev_root) {
		DRM_ERROR("Cannot create /proc/dri/%s\n", name);
		return -1;
	}

	for (i = 0; i < DRM_PROC_ENTRIES; i++) {
		ent = create_proc_entry(drm_proc_list[i].name,
					S_IFREG|S_IRUGO, *dev_root);
		if (!ent) {
			DRM_ERROR("Cannot create /proc/dri/%s/%s\n",
				  name, drm_proc_list[i].name);
			for (j = 0; j < i; j++)
				remove_proc_entry(drm_proc_list[i].name,
						  *dev_root);
			remove_proc_entry(name, root);
			return -1;
		}
		ent->read_proc = drm_proc_list[i].f;
		ent->data      = dev;
	}

	return 0;
}


/**
 * Cleanup the proc filesystem resources.
 *
 * \param minor device minor number.
 * \param root DRI proc dir entry.
 * \param dev_root DRI device proc dir entry.
 * \return always zero.
 *
 * Remove all proc entries created by proc_init().
 */
int drm_proc_cleanup(int minor, struct proc_dir_entry *root,
		      struct proc_dir_entry *dev_root)
{
	int  i;
	char name[64];

	if (!root || !dev_root) return 0;

	for (i = 0; i < DRM_PROC_ENTRIES; i++)
		remove_proc_entry(drm_proc_list[i].name, dev_root);
	sprintf(name, "%d", minor);
	remove_proc_entry(name, root);

	return 0;
}

/**
 * Called when "/proc/dri/.../name" is read.
 * 
 * \param buf output buffer.
 * \param start start of output data.
 * \param offset requested start offset.
 * \param request requested number of bytes.
 * \param eof whether there is no more data to return.
 * \param data private data.
 * \return number of written bytes.
 * 
 * Prints the device name together with the bus id if available.
 */
static int drm_name_info(char *buf, char **start, off_t offset, int request,
			  int *eof, void *data)
{
	drm_device_t *dev = (drm_device_t *)data;
	int          len  = 0;

	if (offset > DRM_PROC_LIMIT) {
		*eof = 1;
		return 0;
	}

	*start = &buf[offset];
	*eof   = 0;

	if (dev->unique) {
		DRM_PROC_PRINT("%s %s %s\n",
			       dev->driver->pci_driver.name, pci_name(dev->pdev), dev->unique);
	} else {
		DRM_PROC_PRINT("%s %s\n", dev->driver->pci_driver.name, pci_name(dev->pdev));
	}

	if (len > request + offset) return request;
	*eof = 1;
	return len - offset;
}

/**
 * Called when "/proc/dri/.../vm" is read.
 * 
 * \param buf output buffer.
 * \param start start of output data.
 * \param offset requested start offset.
 * \param request requested number of bytes.
 * \param eof whether there is no more data to return.
 * \param data private data.
 * \return number of written bytes.
 * 
 * Prints information about all mappings in drm_device::maplist.
 */
static int drm__vm_info(char *buf, char **start, off_t offset, int request,
			 int *eof, void *data)
{
	drm_device_t *dev = (drm_device_t *)data;
	int          len  = 0;
	drm_map_t    *map;
	drm_map_list_t *r_list;
	struct list_head *list;

				/* Hardcoded from _DRM_FRAME_BUFFER,
                                   _DRM_REGISTERS, _DRM_SHM, _DRM_AGP, and
                                   _DRM_SCATTER_GATHER. */
	const char   *types[] = { "FB", "REG", "SHM", "AGP", "SG" };
	const char   *type;
	int	     i;

	if (offset > DRM_PROC_LIMIT) {
		*eof = 1;
		return 0;
	}

	*start = &buf[offset];
	*eof   = 0;

	DRM_PROC_PRINT("slot	 offset	      size type flags	 "
		       "address mtrr\n\n");
	i = 0;
	if (dev->maplist != NULL) list_for_each(list, &dev->maplist->head) {
		r_list = list_entry(list, drm_map_list_t, head);
		map = r_list->map;
		if(!map) continue;
		if (map->type < 0 || map->type > 4) type = "??";
		else				    type = types[map->type];
		DRM_PROC_PRINT("%4d 0x%08lx 0x%08lx %4.4s  0x%02x 0x%08lx ",
			       i,
			       map->offset,
			       map->size,
			       type,
			       map->flags,
			       (unsigned long)map->handle);
		if (map->mtrr < 0) {
			DRM_PROC_PRINT("none\n");
		} else {
			DRM_PROC_PRINT("%4d\n", map->mtrr);
		}
		i++;
	}

	if (len > request + offset) return request;
	*eof = 1;
	return len - offset;
}

/**
 * Simply calls _vm_info() while holding the drm_device::struct_sem lock.
 */
static int drm_vm_info(char *buf, char **start, off_t offset, int request,
			int *eof, void *data)
{
	drm_device_t *dev = (drm_device_t *)data;
	int	     ret;

	down(&dev->struct_sem);
	ret = drm__vm_info(buf, start, offset, request, eof, data);
	up(&dev->struct_sem);
	return ret;
}

/**
 * Called when "/proc/dri/.../queues" is read.
 * 
 * \param buf output buffer.
 * \param start start of output data.
 * \param offset requested start offset.
 * \param request requested number of bytes.
 * \param eof whether there is no more data to return.
 * \param data private data.
 * \return number of written bytes.
 */
static int drm__queues_info(char *buf, char **start, off_t offset,
			     int request, int *eof, void *data)
{
	drm_device_t *dev = (drm_device_t *)data;
	int          len  = 0;
	int	     i;
	drm_queue_t  *q;

	if (offset > DRM_PROC_LIMIT) {
		*eof = 1;
		return 0;
	}

	*start = &buf[offset];
	*eof   = 0;

	DRM_PROC_PRINT("  ctx/flags   use   fin"
		       "   blk/rw/rwf  wait    flushed	   queued"
		       "      locks\n\n");
	for (i = 0; i < dev->queue_count; i++) {
		q = dev->queuelist[i];
		atomic_inc(&q->use_count);
		DRM_PROC_PRINT_RET(atomic_dec(&q->use_count),
				   "%5d/0x%03x %5d %5d"
				   " %5d/%c%c/%c%c%c %5Zd\n",
				   i,
				   q->flags,
				   atomic_read(&q->use_count),
				   atomic_read(&q->finalization),
				   atomic_read(&q->block_count),
				   atomic_read(&q->block_read) ? 'r' : '-',
				   atomic_read(&q->block_write) ? 'w' : '-',
				   waitqueue_active(&q->read_queue) ? 'r':'-',
				   waitqueue_active(&q->write_queue) ? 'w':'-',
				   waitqueue_active(&q->flush_queue) ? 'f':'-',
				   DRM_BUFCOUNT(&q->waitlist));
		atomic_dec(&q->use_count);
	}

	if (len > request + offset) return request;
	*eof = 1;
	return len - offset;
}

/**
 * Simply calls _queues_info() while holding the drm_device::struct_sem lock.
 */
static int drm_queues_info(char *buf, char **start, off_t offset, int request,
			    int *eof, void *data)
{
	drm_device_t *dev = (drm_device_t *)data;
	int	     ret;

	down(&dev->struct_sem);
	ret = drm__queues_info(buf, start, offset, request, eof, data);
	up(&dev->struct_sem);
	return ret;
}

/**
 * Called when "/proc/dri/.../bufs" is read.
 * 
 * \param buf output buffer.
 * \param start start of output data.
 * \param offset requested start offset.
 * \param request requested number of bytes.
 * \param eof whether there is no more data to return.
 * \param data private data.
 * \return number of written bytes.
 */
static int drm__bufs_info(char *buf, char **start, off_t offset, int request,
			   int *eof, void *data)
{
	drm_device_t	 *dev = (drm_device_t *)data;
	int              len  = 0;
	drm_device_dma_t *dma = dev->dma;
	int		 i;

	if (!dma || offset > DRM_PROC_LIMIT) {
		*eof = 1;
		return 0;
	}

	*start = &buf[offset];
	*eof   = 0;

	DRM_PROC_PRINT(" o     size count  free	 segs pages    kB\n\n");
	for (i = 0; i <= DRM_MAX_ORDER; i++) {
		if (dma->bufs[i].buf_count)
			DRM_PROC_PRINT("%2d %8d %5d %5d %5d %5d %5ld\n",
				       i,
				       dma->bufs[i].buf_size,
				       dma->bufs[i].buf_count,
				       atomic_read(&dma->bufs[i]
						   .freelist.count),
				       dma->bufs[i].seg_count,
				       dma->bufs[i].seg_count
				       *(1 << dma->bufs[i].page_order),
				       (dma->bufs[i].seg_count
					* (1 << dma->bufs[i].page_order))
				       * PAGE_SIZE / 1024);
	}
	DRM_PROC_PRINT("\n");
	for (i = 0; i < dma->buf_count; i++) {
		if (i && !(i%32)) DRM_PROC_PRINT("\n");
		DRM_PROC_PRINT(" %d", dma->buflist[i]->list);
	}
	DRM_PROC_PRINT("\n");

	if (len > request + offset) return request;
	*eof = 1;
	return len - offset;
}

/**
 * Simply calls _bufs_info() while holding the drm_device::struct_sem lock.
 */
static int drm_bufs_info(char *buf, char **start, off_t offset, int request,
			  int *eof, void *data)
{
	drm_device_t *dev = (drm_device_t *)data;
	int	     ret;

	down(&dev->struct_sem);
	ret = drm__bufs_info(buf, start, offset, request, eof, data);
	up(&dev->struct_sem);
	return ret;
}

/**
 * Called when "/proc/dri/.../clients" is read.
 * 
 * \param buf output buffer.
 * \param start start of output data.
 * \param offset requested start offset.
 * \param request requested number of bytes.
 * \param eof whether there is no more data to return.
 * \param data private data.
 * \return number of written bytes.
 */
static int drm__clients_info(char *buf, char **start, off_t offset,
			      int request, int *eof, void *data)
{
	drm_device_t *dev = (drm_device_t *)data;
	int          len  = 0;
	drm_file_t   *priv;

	if (offset > DRM_PROC_LIMIT) {
		*eof = 1;
		return 0;
	}

	*start = &buf[offset];
	*eof   = 0;

	DRM_PROC_PRINT("a dev	pid    uid	magic	  ioctls\n\n");
	for (priv = dev->file_first; priv; priv = priv->next) {
		DRM_PROC_PRINT("%c %3d %5d %5d %10u %10lu\n",
			       priv->authenticated ? 'y' : 'n',
			       priv->minor,
			       priv->pid,
			       priv->uid,
			       priv->magic,
			       priv->ioctl_count);
	}

	if (len > request + offset) return request;
	*eof = 1;
	return len - offset;
}

/**
 * Simply calls _clients_info() while holding the drm_device::struct_sem lock.
 */
static int drm_clients_info(char *buf, char **start, off_t offset,
			     int request, int *eof, void *data)
{
	drm_device_t *dev = (drm_device_t *)data;
	int	     ret;

	down(&dev->struct_sem);
	ret = drm__clients_info(buf, start, offset, request, eof, data);
	up(&dev->struct_sem);
	return ret;
}

#if DRM_DEBUG_CODE

static int drm__vma_info(char *buf, char **start, off_t offset, int request,
			  int *eof, void *data)
{
	drm_device_t	      *dev = (drm_device_t *)data;
	int                   len  = 0;
	drm_vma_entry_t	      *pt;
	struct vm_area_struct *vma;
#if defined(__i386__)
	unsigned int	      pgprot;
#endif

	if (offset > DRM_PROC_LIMIT) {
		*eof = 1;
		return 0;
	}

	*start = &buf[offset];
	*eof   = 0;

	DRM_PROC_PRINT("vma use count: %d, high_memory = %p, 0x%08lx\n",
		       atomic_read(&dev->vma_count),
		       high_memory, virt_to_phys(high_memory));
	for (pt = dev->vmalist; pt; pt = pt->next) {
		if (!(vma = pt->vma)) continue;
		DRM_PROC_PRINT("\n%5d 0x%08lx-0x%08lx %c%c%c%c%c%c 0x%08lx",
			       pt->pid,
			       vma->vm_start,
			       vma->vm_end,
			       vma->vm_flags & VM_READ	   ? 'r' : '-',
			       vma->vm_flags & VM_WRITE	   ? 'w' : '-',
			       vma->vm_flags & VM_EXEC	   ? 'x' : '-',
			       vma->vm_flags & VM_MAYSHARE ? 's' : 'p',
			       vma->vm_flags & VM_LOCKED   ? 'l' : '-',
			       vma->vm_flags & VM_IO	   ? 'i' : '-',
			       VM_OFFSET(vma));

#if defined(__i386__)
		pgprot = pgprot_val(vma->vm_page_prot);
		DRM_PROC_PRINT(" %c%c%c%c%c%c%c%c%c",
			       pgprot & _PAGE_PRESENT  ? 'p' : '-',
			       pgprot & _PAGE_RW       ? 'w' : 'r',
			       pgprot & _PAGE_USER     ? 'u' : 's',
			       pgprot & _PAGE_PWT      ? 't' : 'b',
			       pgprot & _PAGE_PCD      ? 'u' : 'c',
			       pgprot & _PAGE_ACCESSED ? 'a' : '-',
			       pgprot & _PAGE_DIRTY    ? 'd' : '-',
			       pgprot & _PAGE_PSE      ? 'm' : 'k',
			       pgprot & _PAGE_GLOBAL   ? 'g' : 'l' );
#endif
		DRM_PROC_PRINT("\n");
	}

	if (len > request + offset) return request;
	*eof = 1;
	return len - offset;
}

static int drm_vma_info(char *buf, char **start, off_t offset, int request,
			 int *eof, void *data)
{
	drm_device_t *dev = (drm_device_t *)data;
	int	     ret;

	down(&dev->struct_sem);
	ret = drm__vma_info(buf, start, offset, request, eof, data);
	up(&dev->struct_sem);
	return ret;
}
#endif