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airport: remove useless return in a function returning void
[linux/fpc-iii.git] / drivers / gpu / drm / drm_proc.c
blobae73b7f7249ad36059dde96219fe2fb33022b082
1 /**
2 * \file drm_proc.c
3 * /proc support for DRM
4 *
5 * \author Rickard E. (Rik) Faith <faith@valinux.com>
6 * \author Gareth Hughes <gareth@valinux.com>
7 *
8 * \par Acknowledgements:
9 * Matthew J Sottek <matthew.j.sottek@intel.com> sent in a patch to fix
10 * the problem with the proc files not outputting all their information.
11 */
12
13 /*
14 * Created: Mon Jan 11 09:48:47 1999 by faith@valinux.com
15 *
16 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
17 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
18 * All Rights Reserved.
19 *
20 * Permission is hereby granted, free of charge, to any person obtaining a
21 * copy of this software and associated documentation files (the "Software"),
22 * to deal in the Software without restriction, including without limitation
23 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
24 * and/or sell copies of the Software, and to permit persons to whom the
25 * Software is furnished to do so, subject to the following conditions:
26 *
27 * The above copyright notice and this permission notice (including the next
28 * paragraph) shall be included in all copies or substantial portions of the
29 * Software.
30 *
31 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
32 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
33 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
34 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
35 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
36 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
37 * OTHER DEALINGS IN THE SOFTWARE.
38 */
39
40 #include "drmP.h"
41
42 static int drm_name_info(char *buf, char **start, off_t offset,
43 int request, int *eof, void *data);
44 static int drm_vm_info(char *buf, char **start, off_t offset,
45 int request, int *eof, void *data);
46 static int drm_clients_info(char *buf, char **start, off_t offset,
47 int request, int *eof, void *data);
48 static int drm_queues_info(char *buf, char **start, off_t offset,
49 int request, int *eof, void *data);
50 static int drm_bufs_info(char *buf, char **start, off_t offset,
51 int request, int *eof, void *data);
52 static int drm_gem_name_info(char *buf, char **start, off_t offset,
53 int request, int *eof, void *data);
54 static int drm_gem_object_info(char *buf, char **start, off_t offset,
55 int request, int *eof, void *data);
56 #if DRM_DEBUG_CODE
57 static int drm_vma_info(char *buf, char **start, off_t offset,
58 int request, int *eof, void *data);
59 #endif
60
61 /**
62 * Proc file list.
63 */
64 static struct drm_proc_list {
65 const char *name; /**< file name */
66 int (*f) (char *, char **, off_t, int, int *, void *); /**< proc callback*/
67 u32 driver_features; /**< Required driver features for this entry */
68 } drm_proc_list[] = {
69 {"name", drm_name_info, 0},
70 {"mem", drm_mem_info, 0},
71 {"vm", drm_vm_info, 0},
72 {"clients", drm_clients_info, 0},
73 {"queues", drm_queues_info, 0},
74 {"bufs", drm_bufs_info, 0},
75 {"gem_names", drm_gem_name_info, DRIVER_GEM},
76 {"gem_objects", drm_gem_object_info, DRIVER_GEM},
77 #if DRM_DEBUG_CODE
78 {"vma", drm_vma_info},
79 #endif
80 };
81
82 #define DRM_PROC_ENTRIES ARRAY_SIZE(drm_proc_list)
83
84 /**
85 * Initialize the DRI proc filesystem for a device.
86 *
87 * \param dev DRM device.
88 * \param minor device minor number.
89 * \param root DRI proc dir entry.
90 * \param dev_root resulting DRI device proc dir entry.
91 * \return root entry pointer on success, or NULL on failure.
92 *
93 * Create the DRI proc root entry "/proc/dri", the device proc root entry
94 * "/proc/dri/%minor%/", and each entry in proc_list as
95 * "/proc/dri/%minor%/%name%".
96 */
97 int drm_proc_init(struct drm_minor *minor, int minor_id,
98 struct proc_dir_entry *root)
99 {
100 struct drm_device *dev = minor->dev;
101 struct proc_dir_entry *ent;
102 int i, j, ret;
103 char name[64];
104
105 sprintf(name, "%d", minor_id);
106 minor->dev_root = proc_mkdir(name, root);
107 if (!minor->dev_root) {
108 DRM_ERROR("Cannot create /proc/dri/%s\n", name);
109 return -1;
110 }
111
112 for (i = 0; i < DRM_PROC_ENTRIES; i++) {
113 u32 features = drm_proc_list[i].driver_features;
114
115 if (features != 0 &&
116 (dev->driver->driver_features & features) != features)
117 continue;
118
119 ent = create_proc_entry(drm_proc_list[i].name,
120 S_IFREG | S_IRUGO, minor->dev_root);
121 if (!ent) {
122 DRM_ERROR("Cannot create /proc/dri/%s/%s\n",
123 name, drm_proc_list[i].name);
124 ret = -1;
125 goto fail;
126 }
127 ent->read_proc = drm_proc_list[i].f;
128 ent->data = minor;
129 }
130
131 if (dev->driver->proc_init) {
132 ret = dev->driver->proc_init(minor);
133 if (ret) {
134 DRM_ERROR("DRM: Driver failed to initialize "
135 "/proc/dri.\n");
136 goto fail;
137 }
138 }
139
140 return 0;
141 fail:
142
143 for (j = 0; j < i; j++)
144 remove_proc_entry(drm_proc_list[i].name,
145 minor->dev_root);
146 remove_proc_entry(name, root);
147 minor->dev_root = NULL;
148 return ret;
149 }
150
151 /**
152 * Cleanup the proc filesystem resources.
153 *
154 * \param minor device minor number.
155 * \param root DRI proc dir entry.
156 * \param dev_root DRI device proc dir entry.
157 * \return always zero.
158 *
159 * Remove all proc entries created by proc_init().
160 */
161 int drm_proc_cleanup(struct drm_minor *minor, struct proc_dir_entry *root)
162 {
163 struct drm_device *dev = minor->dev;
164 int i;
165 char name[64];
166
167 if (!root || !minor->dev_root)
168 return 0;
169
170 if (dev->driver->proc_cleanup)
171 dev->driver->proc_cleanup(minor);
172
173 for (i = 0; i < DRM_PROC_ENTRIES; i++)
174 remove_proc_entry(drm_proc_list[i].name, minor->dev_root);
175 sprintf(name, "%d", minor->index);
176 remove_proc_entry(name, root);
177
178 return 0;
179 }
180
181 /**
182 * Called when "/proc/dri/.../name" is read.
183 *
184 * \param buf output buffer.
185 * \param start start of output data.
186 * \param offset requested start offset.
187 * \param request requested number of bytes.
188 * \param eof whether there is no more data to return.
189 * \param data private data.
190 * \return number of written bytes.
191 *
192 * Prints the device name together with the bus id if available.
193 */
194 static int drm_name_info(char *buf, char **start, off_t offset, int request,
195 int *eof, void *data)
196 {
197 struct drm_minor *minor = (struct drm_minor *) data;
198 struct drm_device *dev = minor->dev;
199 int len = 0;
200
201 if (offset > DRM_PROC_LIMIT) {
202 *eof = 1;
203 return 0;
204 }
205
206 *start = &buf[offset];
207 *eof = 0;
208
209 if (dev->unique) {
210 DRM_PROC_PRINT("%s %s %s\n",
211 dev->driver->pci_driver.name,
212 pci_name(dev->pdev), dev->unique);
213 } else {
214 DRM_PROC_PRINT("%s %s\n", dev->driver->pci_driver.name,
215 pci_name(dev->pdev));
216 }
217
218 if (len > request + offset)
219 return request;
220 *eof = 1;
221 return len - offset;
222 }
223
224 /**
225 * Called when "/proc/dri/.../vm" is read.
226 *
227 * \param buf output buffer.
228 * \param start start of output data.
229 * \param offset requested start offset.
230 * \param request requested number of bytes.
231 * \param eof whether there is no more data to return.
232 * \param data private data.
233 * \return number of written bytes.
234 *
235 * Prints information about all mappings in drm_device::maplist.
236 */
237 static int drm__vm_info(char *buf, char **start, off_t offset, int request,
238 int *eof, void *data)
239 {
240 struct drm_minor *minor = (struct drm_minor *) data;
241 struct drm_device *dev = minor->dev;
242 int len = 0;
243 struct drm_map *map;
244 struct drm_map_list *r_list;
245
246 /* Hardcoded from _DRM_FRAME_BUFFER,
247 _DRM_REGISTERS, _DRM_SHM, _DRM_AGP, and
248 _DRM_SCATTER_GATHER and _DRM_CONSISTENT */
249 const char *types[] = { "FB", "REG", "SHM", "AGP", "SG", "PCI" };
250 const char *type;
251 int i;
252
253 if (offset > DRM_PROC_LIMIT) {
254 *eof = 1;
255 return 0;
256 }
257
258 *start = &buf[offset];
259 *eof = 0;
260
261 DRM_PROC_PRINT("slot offset size type flags "
262 "address mtrr\n\n");
263 i = 0;
264 list_for_each_entry(r_list, &dev->maplist, head) {
265 map = r_list->map;
266 if (!map)
267 continue;
268 if (map->type < 0 || map->type > 5)
269 type = "??";
270 else
271 type = types[map->type];
272 DRM_PROC_PRINT("%4d 0x%08lx 0x%08lx %4.4s 0x%02x 0x%08lx ",
273 i,
274 map->offset,
275 map->size, type, map->flags,
276 (unsigned long) r_list->user_token);
277 if (map->mtrr < 0) {
278 DRM_PROC_PRINT("none\n");
279 } else {
280 DRM_PROC_PRINT("%4d\n", map->mtrr);
281 }
282 i++;
283 }
284
285 if (len > request + offset)
286 return request;
287 *eof = 1;
288 return len - offset;
289 }
290
291 /**
292 * Simply calls _vm_info() while holding the drm_device::struct_mutex lock.
293 */
294 static int drm_vm_info(char *buf, char **start, off_t offset, int request,
295 int *eof, void *data)
296 {
297 struct drm_minor *minor = (struct drm_minor *) data;
298 struct drm_device *dev = minor->dev;
299 int ret;
300
301 mutex_lock(&dev->struct_mutex);
302 ret = drm__vm_info(buf, start, offset, request, eof, data);
303 mutex_unlock(&dev->struct_mutex);
304 return ret;
305 }
306
307 /**
308 * Called when "/proc/dri/.../queues" is read.
309 *
310 * \param buf output buffer.
311 * \param start start of output data.
312 * \param offset requested start offset.
313 * \param request requested number of bytes.
314 * \param eof whether there is no more data to return.
315 * \param data private data.
316 * \return number of written bytes.
317 */
318 static int drm__queues_info(char *buf, char **start, off_t offset,
319 int request, int *eof, void *data)
320 {
321 struct drm_minor *minor = (struct drm_minor *) data;
322 struct drm_device *dev = minor->dev;
323 int len = 0;
324 int i;
325 struct drm_queue *q;
326
327 if (offset > DRM_PROC_LIMIT) {
328 *eof = 1;
329 return 0;
330 }
331
332 *start = &buf[offset];
333 *eof = 0;
334
335 DRM_PROC_PRINT(" ctx/flags use fin"
336 " blk/rw/rwf wait flushed queued"
337 " locks\n\n");
338 for (i = 0; i < dev->queue_count; i++) {
339 q = dev->queuelist[i];
340 atomic_inc(&q->use_count);
341 DRM_PROC_PRINT_RET(atomic_dec(&q->use_count),
342 "%5d/0x%03x %5d %5d"
343 " %5d/%c%c/%c%c%c %5Zd\n",
344 i,
345 q->flags,
346 atomic_read(&q->use_count),
347 atomic_read(&q->finalization),
348 atomic_read(&q->block_count),
349 atomic_read(&q->block_read) ? 'r' : '-',
350 atomic_read(&q->block_write) ? 'w' : '-',
351 waitqueue_active(&q->read_queue) ? 'r' : '-',
352 waitqueue_active(&q->
353 write_queue) ? 'w' : '-',
354 waitqueue_active(&q->
355 flush_queue) ? 'f' : '-',
356 DRM_BUFCOUNT(&q->waitlist));
357 atomic_dec(&q->use_count);
358 }
359
360 if (len > request + offset)
361 return request;
362 *eof = 1;
363 return len - offset;
364 }
365
366 /**
367 * Simply calls _queues_info() while holding the drm_device::struct_mutex lock.
368 */
369 static int drm_queues_info(char *buf, char **start, off_t offset, int request,
370 int *eof, void *data)
371 {
372 struct drm_minor *minor = (struct drm_minor *) data;
373 struct drm_device *dev = minor->dev;
374 int ret;
375
376 mutex_lock(&dev->struct_mutex);
377 ret = drm__queues_info(buf, start, offset, request, eof, data);
378 mutex_unlock(&dev->struct_mutex);
379 return ret;
380 }
381
382 /**
383 * Called when "/proc/dri/.../bufs" is read.
384 *
385 * \param buf output buffer.
386 * \param start start of output data.
387 * \param offset requested start offset.
388 * \param request requested number of bytes.
389 * \param eof whether there is no more data to return.
390 * \param data private data.
391 * \return number of written bytes.
392 */
393 static int drm__bufs_info(char *buf, char **start, off_t offset, int request,
394 int *eof, void *data)
395 {
396 struct drm_minor *minor = (struct drm_minor *) data;
397 struct drm_device *dev = minor->dev;
398 int len = 0;
399 struct drm_device_dma *dma = dev->dma;
400 int i;
401
402 if (!dma || offset > DRM_PROC_LIMIT) {
403 *eof = 1;
404 return 0;
405 }
406
407 *start = &buf[offset];
408 *eof = 0;
409
410 DRM_PROC_PRINT(" o size count free segs pages kB\n\n");
411 for (i = 0; i <= DRM_MAX_ORDER; i++) {
412 if (dma->bufs[i].buf_count)
413 DRM_PROC_PRINT("%2d %8d %5d %5d %5d %5d %5ld\n",
414 i,
415 dma->bufs[i].buf_size,
416 dma->bufs[i].buf_count,
417 atomic_read(&dma->bufs[i]
418 .freelist.count),
419 dma->bufs[i].seg_count,
420 dma->bufs[i].seg_count
421 * (1 << dma->bufs[i].page_order),
422 (dma->bufs[i].seg_count
423 * (1 << dma->bufs[i].page_order))
424 * PAGE_SIZE / 1024);
425 }
426 DRM_PROC_PRINT("\n");
427 for (i = 0; i < dma->buf_count; i++) {
428 if (i && !(i % 32))
429 DRM_PROC_PRINT("\n");
430 DRM_PROC_PRINT(" %d", dma->buflist[i]->list);
431 }
432 DRM_PROC_PRINT("\n");
433
434 if (len > request + offset)
435 return request;
436 *eof = 1;
437 return len - offset;
438 }
439
440 /**
441 * Simply calls _bufs_info() while holding the drm_device::struct_mutex lock.
442 */
443 static int drm_bufs_info(char *buf, char **start, off_t offset, int request,
444 int *eof, void *data)
445 {
446 struct drm_minor *minor = (struct drm_minor *) data;
447 struct drm_device *dev = minor->dev;
448 int ret;
449
450 mutex_lock(&dev->struct_mutex);
451 ret = drm__bufs_info(buf, start, offset, request, eof, data);
452 mutex_unlock(&dev->struct_mutex);
453 return ret;
454 }
455
456 /**
457 * Called when "/proc/dri/.../clients" is read.
458 *
459 * \param buf output buffer.
460 * \param start start of output data.
461 * \param offset requested start offset.
462 * \param request requested number of bytes.
463 * \param eof whether there is no more data to return.
464 * \param data private data.
465 * \return number of written bytes.
466 */
467 static int drm__clients_info(char *buf, char **start, off_t offset,
468 int request, int *eof, void *data)
469 {
470 struct drm_minor *minor = (struct drm_minor *) data;
471 struct drm_device *dev = minor->dev;
472 int len = 0;
473 struct drm_file *priv;
474
475 if (offset > DRM_PROC_LIMIT) {
476 *eof = 1;
477 return 0;
478 }
479
480 *start = &buf[offset];
481 *eof = 0;
482
483 DRM_PROC_PRINT("a dev pid uid magic ioctls\n\n");
484 list_for_each_entry(priv, &dev->filelist, lhead) {
485 DRM_PROC_PRINT("%c %3d %5d %5d %10u %10lu\n",
486 priv->authenticated ? 'y' : 'n',
487 priv->minor->index,
488 priv->pid,
489 priv->uid, priv->magic, priv->ioctl_count);
490 }
491
492 if (len > request + offset)
493 return request;
494 *eof = 1;
495 return len - offset;
496 }
497
498 /**
499 * Simply calls _clients_info() while holding the drm_device::struct_mutex lock.
500 */
501 static int drm_clients_info(char *buf, char **start, off_t offset,
502 int request, int *eof, void *data)
503 {
504 struct drm_minor *minor = (struct drm_minor *) data;
505 struct drm_device *dev = minor->dev;
506 int ret;
507
508 mutex_lock(&dev->struct_mutex);
509 ret = drm__clients_info(buf, start, offset, request, eof, data);
510 mutex_unlock(&dev->struct_mutex);
511 return ret;
512 }
513
514 struct drm_gem_name_info_data {
515 int len;
516 char *buf;
517 int eof;
518 };
519
520 static int drm_gem_one_name_info(int id, void *ptr, void *data)
521 {
522 struct drm_gem_object *obj = ptr;
523 struct drm_gem_name_info_data *nid = data;
524
525 DRM_INFO("name %d size %zd\n", obj->name, obj->size);
526 if (nid->eof)
527 return 0;
528
529 nid->len += sprintf(&nid->buf[nid->len],
530 "%6d %8zd %7d %8d\n",
531 obj->name, obj->size,
532 atomic_read(&obj->handlecount.refcount),
533 atomic_read(&obj->refcount.refcount));
534 if (nid->len > DRM_PROC_LIMIT) {
535 nid->eof = 1;
536 return 0;
537 }
538 return 0;
539 }
540
541 static int drm_gem_name_info(char *buf, char **start, off_t offset,
542 int request, int *eof, void *data)
543 {
544 struct drm_minor *minor = (struct drm_minor *) data;
545 struct drm_device *dev = minor->dev;
546 struct drm_gem_name_info_data nid;
547
548 if (offset > DRM_PROC_LIMIT) {
549 *eof = 1;
550 return 0;
551 }
552
553 nid.len = sprintf(buf, " name size handles refcount\n");
554 nid.buf = buf;
555 nid.eof = 0;
556 idr_for_each(&dev->object_name_idr, drm_gem_one_name_info, &nid);
557
558 *start = &buf[offset];
559 *eof = 0;
560 if (nid.len > request + offset)
561 return request;
562 *eof = 1;
563 return nid.len - offset;
564 }
565
566 static int drm_gem_object_info(char *buf, char **start, off_t offset,
567 int request, int *eof, void *data)
568 {
569 struct drm_minor *minor = (struct drm_minor *) data;
570 struct drm_device *dev = minor->dev;
571 int len = 0;
572
573 if (offset > DRM_PROC_LIMIT) {
574 *eof = 1;
575 return 0;
576 }
577
578 *start = &buf[offset];
579 *eof = 0;
580 DRM_PROC_PRINT("%d objects\n", atomic_read(&dev->object_count));
581 DRM_PROC_PRINT("%d object bytes\n", atomic_read(&dev->object_memory));
582 DRM_PROC_PRINT("%d pinned\n", atomic_read(&dev->pin_count));
583 DRM_PROC_PRINT("%d pin bytes\n", atomic_read(&dev->pin_memory));
584 DRM_PROC_PRINT("%d gtt bytes\n", atomic_read(&dev->gtt_memory));
585 DRM_PROC_PRINT("%d gtt total\n", dev->gtt_total);
586 if (len > request + offset)
587 return request;
588 *eof = 1;
589 return len - offset;
590 }
591
592 #if DRM_DEBUG_CODE
593
594 static int drm__vma_info(char *buf, char **start, off_t offset, int request,
595 int *eof, void *data)
596 {
597 struct drm_minor *minor = (struct drm_minor *) data;
598 struct drm_device *dev = minor->dev;
599 int len = 0;
600 struct drm_vma_entry *pt;
601 struct vm_area_struct *vma;
602 #if defined(__i386__)
603 unsigned int pgprot;
604 #endif
605
606 if (offset > DRM_PROC_LIMIT) {
607 *eof = 1;
608 return 0;
609 }
610
611 *start = &buf[offset];
612 *eof = 0;
613
614 DRM_PROC_PRINT("vma use count: %d, high_memory = %p, 0x%08lx\n",
615 atomic_read(&dev->vma_count),
616 high_memory, virt_to_phys(high_memory));
617 list_for_each_entry(pt, &dev->vmalist, head) {
618 if (!(vma = pt->vma))
619 continue;
620 DRM_PROC_PRINT("\n%5d 0x%08lx-0x%08lx %c%c%c%c%c%c 0x%08lx000",
621 pt->pid,
622 vma->vm_start,
623 vma->vm_end,
624 vma->vm_flags & VM_READ ? 'r' : '-',
625 vma->vm_flags & VM_WRITE ? 'w' : '-',
626 vma->vm_flags & VM_EXEC ? 'x' : '-',
627 vma->vm_flags & VM_MAYSHARE ? 's' : 'p',
628 vma->vm_flags & VM_LOCKED ? 'l' : '-',
629 vma->vm_flags & VM_IO ? 'i' : '-',
630 vma->vm_pgoff);
631
632 #if defined(__i386__)
633 pgprot = pgprot_val(vma->vm_page_prot);
634 DRM_PROC_PRINT(" %c%c%c%c%c%c%c%c%c",
635 pgprot & _PAGE_PRESENT ? 'p' : '-',
636 pgprot & _PAGE_RW ? 'w' : 'r',
637 pgprot & _PAGE_USER ? 'u' : 's',
638 pgprot & _PAGE_PWT ? 't' : 'b',
639 pgprot & _PAGE_PCD ? 'u' : 'c',
640 pgprot & _PAGE_ACCESSED ? 'a' : '-',
641 pgprot & _PAGE_DIRTY ? 'd' : '-',
642 pgprot & _PAGE_PSE ? 'm' : 'k',
643 pgprot & _PAGE_GLOBAL ? 'g' : 'l');
644 #endif
645 DRM_PROC_PRINT("\n");
646 }
647
648 if (len > request + offset)
649 return request;
650 *eof = 1;
651 return len - offset;
652 }
653
654 static int drm_vma_info(char *buf, char **start, off_t offset, int request,
655 int *eof, void *data)
656 {
657 struct drm_minor *minor = (struct drm_minor *) data;
658 struct drm_device *dev = minor->dev;
659 int ret;
660
661 mutex_lock(&dev->struct_mutex);
662 ret = drm__vma_info(buf, start, offset, request, eof, data);
663 mutex_unlock(&dev->struct_mutex);
664 return ret;
665 }
666 #endif
Linux with added FPC-III support