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 #if DRM_DEBUG_CODE
53 static int drm_vma_info(char *buf, char **start, off_t offset,
54 int request, int *eof, void *data);
55 #endif
56
57 /**
58 * Proc file list.
59 */
60 static struct drm_proc_list {
61 const char *name; /**< file name */
62 int (*f) (char *, char **, off_t, int, int *, void *); /**< proc callback*/
63 } drm_proc_list[] = {
64 {"name", drm_name_info},
65 {"mem", drm_mem_info},
66 {"vm", drm_vm_info},
67 {"clients", drm_clients_info},
68 {"queues", drm_queues_info},
69 {"bufs", drm_bufs_info},
70 #if DRM_DEBUG_CODE
71 {"vma", drm_vma_info},
72 #endif
73 };
74
75 #define DRM_PROC_ENTRIES ARRAY_SIZE(drm_proc_list)
76
77 /**
78 * Initialize the DRI proc filesystem for a device.
79 *
80 * \param dev DRM device.
81 * \param minor device minor number.
82 * \param root DRI proc dir entry.
83 * \param dev_root resulting DRI device proc dir entry.
84 * \return root entry pointer on success, or NULL on failure.
85 *
86 * Create the DRI proc root entry "/proc/dri", the device proc root entry
87 * "/proc/dri/%minor%/", and each entry in proc_list as
88 * "/proc/dri/%minor%/%name%".
89 */
90 int drm_proc_init(struct drm_device * dev, int minor,
91 struct proc_dir_entry *root, struct proc_dir_entry **dev_root)
92 {
93 struct proc_dir_entry *ent;
94 int i, j;
95 char name[64];
96
97 sprintf(name, "%d", minor);
98 *dev_root = proc_mkdir(name, root);
99 if (!*dev_root) {
100 DRM_ERROR("Cannot create /proc/dri/%s\n", name);
101 return -1;
102 }
103
104 for (i = 0; i < DRM_PROC_ENTRIES; i++) {
105 ent = create_proc_entry(drm_proc_list[i].name,
106 S_IFREG | S_IRUGO, *dev_root);
107 if (!ent) {
108 DRM_ERROR("Cannot create /proc/dri/%s/%s\n",
109 name, drm_proc_list[i].name);
110 for (j = 0; j < i; j++)
111 remove_proc_entry(drm_proc_list[i].name,
112 *dev_root);
113 remove_proc_entry(name, root);
114 return -1;
115 }
116 ent->read_proc = drm_proc_list[i].f;
117 ent->data = dev;
118 }
119
120 return 0;
121 }
122
123 /**
124 * Cleanup the proc filesystem resources.
125 *
126 * \param minor device minor number.
127 * \param root DRI proc dir entry.
128 * \param dev_root DRI device proc dir entry.
129 * \return always zero.
130 *
131 * Remove all proc entries created by proc_init().
132 */
133 int drm_proc_cleanup(int minor, struct proc_dir_entry *root,
134 struct proc_dir_entry *dev_root)
135 {
136 int i;
137 char name[64];
138
139 if (!root || !dev_root)
140 return 0;
141
142 for (i = 0; i < DRM_PROC_ENTRIES; i++)
143 remove_proc_entry(drm_proc_list[i].name, dev_root);
144 sprintf(name, "%d", minor);
145 remove_proc_entry(name, root);
146
147 return 0;
148 }
149
150 /**
151 * Called when "/proc/dri/.../name" is read.
152 *
153 * \param buf output buffer.
154 * \param start start of output data.
155 * \param offset requested start offset.
156 * \param request requested number of bytes.
157 * \param eof whether there is no more data to return.
158 * \param data private data.
159 * \return number of written bytes.
160 *
161 * Prints the device name together with the bus id if available.
162 */
163 static int drm_name_info(char *buf, char **start, off_t offset, int request,
164 int *eof, void *data)
165 {
166 struct drm_device *dev = (struct drm_device *) data;
167 int len = 0;
168
169 if (offset > DRM_PROC_LIMIT) {
170 *eof = 1;
171 return 0;
172 }
173
174 *start = &buf[offset];
175 *eof = 0;
176
177 if (dev->unique) {
178 DRM_PROC_PRINT("%s %s %s\n",
179 dev->driver->pci_driver.name,
180 pci_name(dev->pdev), dev->unique);
181 } else {
182 DRM_PROC_PRINT("%s %s\n", dev->driver->pci_driver.name,
183 pci_name(dev->pdev));
184 }
185
186 if (len > request + offset)
187 return request;
188 *eof = 1;
189 return len - offset;
190 }
191
192 /**
193 * Called when "/proc/dri/.../vm" is read.
194 *
195 * \param buf output buffer.
196 * \param start start of output data.
197 * \param offset requested start offset.
198 * \param request requested number of bytes.
199 * \param eof whether there is no more data to return.
200 * \param data private data.
201 * \return number of written bytes.
202 *
203 * Prints information about all mappings in drm_device::maplist.
204 */
205 static int drm__vm_info(char *buf, char **start, off_t offset, int request,
206 int *eof, void *data)
207 {
208 struct drm_device *dev = (struct drm_device *) data;
209 int len = 0;
210 struct drm_map *map;
211 struct drm_map_list *r_list;
212
213 /* Hardcoded from _DRM_FRAME_BUFFER,
214 _DRM_REGISTERS, _DRM_SHM, _DRM_AGP, and
215 _DRM_SCATTER_GATHER and _DRM_CONSISTENT */
216 const char *types[] = { "FB", "REG", "SHM", "AGP", "SG", "PCI" };
217 const char *type;
218 int i;
219
220 if (offset > DRM_PROC_LIMIT) {
221 *eof = 1;
222 return 0;
223 }
224
225 *start = &buf[offset];
226 *eof = 0;
227
228 DRM_PROC_PRINT("slot offset size type flags "
229 "address mtrr\n\n");
230 i = 0;
231 list_for_each_entry(r_list, &dev->maplist, head) {
232 map = r_list->map;
233 if (!map)
234 continue;
235 if (map->type < 0 || map->type > 5)
236 type = "??";
237 else
238 type = types[map->type];
239 DRM_PROC_PRINT("%4d 0x%08lx 0x%08lx %4.4s 0x%02x 0x%08lx ",
240 i,
241 map->offset,
242 map->size, type, map->flags,
243 (unsigned long) r_list->user_token);
244 if (map->mtrr < 0) {
245 DRM_PROC_PRINT("none\n");
246 } else {
247 DRM_PROC_PRINT("%4d\n", map->mtrr);
248 }
249 i++;
250 }
251
252 if (len > request + offset)
253 return request;
254 *eof = 1;
255 return len - offset;
256 }
257
258 /**
259 * Simply calls _vm_info() while holding the drm_device::struct_mutex lock.
260 */
261 static int drm_vm_info(char *buf, char **start, off_t offset, int request,
262 int *eof, void *data)
263 {
264 struct drm_device *dev = (struct drm_device *) data;
265 int ret;
266
267 mutex_lock(&dev->struct_mutex);
268 ret = drm__vm_info(buf, start, offset, request, eof, data);
269 mutex_unlock(&dev->struct_mutex);
270 return ret;
271 }
272
273 /**
274 * Called when "/proc/dri/.../queues" is read.
275 *
276 * \param buf output buffer.
277 * \param start start of output data.
278 * \param offset requested start offset.
279 * \param request requested number of bytes.
280 * \param eof whether there is no more data to return.
281 * \param data private data.
282 * \return number of written bytes.
283 */
284 static int drm__queues_info(char *buf, char **start, off_t offset,
285 int request, int *eof, void *data)
286 {
287 struct drm_device *dev = (struct drm_device *) data;
288 int len = 0;
289 int i;
290 struct drm_queue *q;
291
292 if (offset > DRM_PROC_LIMIT) {
293 *eof = 1;
294 return 0;
295 }
296
297 *start = &buf[offset];
298 *eof = 0;
299
300 DRM_PROC_PRINT(" ctx/flags use fin"
301 " blk/rw/rwf wait flushed queued"
302 " locks\n\n");
303 for (i = 0; i < dev->queue_count; i++) {
304 q = dev->queuelist[i];
305 atomic_inc(&q->use_count);
306 DRM_PROC_PRINT_RET(atomic_dec(&q->use_count),
307 "%5d/0x%03x %5d %5d"
308 " %5d/%c%c/%c%c%c %5Zd\n",
309 i,
310 q->flags,
311 atomic_read(&q->use_count),
312 atomic_read(&q->finalization),
313 atomic_read(&q->block_count),
314 atomic_read(&q->block_read) ? 'r' : '-',
315 atomic_read(&q->block_write) ? 'w' : '-',
316 waitqueue_active(&q->read_queue) ? 'r' : '-',
317 waitqueue_active(&q->
318 write_queue) ? 'w' : '-',
319 waitqueue_active(&q->
320 flush_queue) ? 'f' : '-',
321 DRM_BUFCOUNT(&q->waitlist));
322 atomic_dec(&q->use_count);
323 }
324
325 if (len > request + offset)
326 return request;
327 *eof = 1;
328 return len - offset;
329 }
330
331 /**
332 * Simply calls _queues_info() while holding the drm_device::struct_mutex lock.
333 */
334 static int drm_queues_info(char *buf, char **start, off_t offset, int request,
335 int *eof, void *data)
336 {
337 struct drm_device *dev = (struct drm_device *) data;
338 int ret;
339
340 mutex_lock(&dev->struct_mutex);
341 ret = drm__queues_info(buf, start, offset, request, eof, data);
342 mutex_unlock(&dev->struct_mutex);
343 return ret;
344 }
345
346 /**
347 * Called when "/proc/dri/.../bufs" is read.
348 *
349 * \param buf output buffer.
350 * \param start start of output data.
351 * \param offset requested start offset.
352 * \param request requested number of bytes.
353 * \param eof whether there is no more data to return.
354 * \param data private data.
355 * \return number of written bytes.
356 */
357 static int drm__bufs_info(char *buf, char **start, off_t offset, int request,
358 int *eof, void *data)
359 {
360 struct drm_device *dev = (struct drm_device *) data;
361 int len = 0;
362 struct drm_device_dma *dma = dev->dma;
363 int i;
364
365 if (!dma || offset > DRM_PROC_LIMIT) {
366 *eof = 1;
367 return 0;
368 }
369
370 *start = &buf[offset];
371 *eof = 0;
372
373 DRM_PROC_PRINT(" o size count free segs pages kB\n\n");
374 for (i = 0; i <= DRM_MAX_ORDER; i++) {
375 if (dma->bufs[i].buf_count)
376 DRM_PROC_PRINT("%2d %8d %5d %5d %5d %5d %5ld\n",
377 i,
378 dma->bufs[i].buf_size,
379 dma->bufs[i].buf_count,
380 atomic_read(&dma->bufs[i]
381 .freelist.count),
382 dma->bufs[i].seg_count,
383 dma->bufs[i].seg_count
384 * (1 << dma->bufs[i].page_order),
385 (dma->bufs[i].seg_count
386 * (1 << dma->bufs[i].page_order))
387 * PAGE_SIZE / 1024);
388 }
389 DRM_PROC_PRINT("\n");
390 for (i = 0; i < dma->buf_count; i++) {
391 if (i && !(i % 32))
392 DRM_PROC_PRINT("\n");
393 DRM_PROC_PRINT(" %d", dma->buflist[i]->list);
394 }
395 DRM_PROC_PRINT("\n");
396
397 if (len > request + offset)
398 return request;
399 *eof = 1;
400 return len - offset;
401 }
402
403 /**
404 * Simply calls _bufs_info() while holding the drm_device::struct_mutex lock.
405 */
406 static int drm_bufs_info(char *buf, char **start, off_t offset, int request,
407 int *eof, void *data)
408 {
409 struct drm_device *dev = (struct drm_device *) data;
410 int ret;
411
412 mutex_lock(&dev->struct_mutex);
413 ret = drm__bufs_info(buf, start, offset, request, eof, data);
414 mutex_unlock(&dev->struct_mutex);
415 return ret;
416 }
417
418 /**
419 * Called when "/proc/dri/.../clients" is read.
420 *
421 * \param buf output buffer.
422 * \param start start of output data.
423 * \param offset requested start offset.
424 * \param request requested number of bytes.
425 * \param eof whether there is no more data to return.
426 * \param data private data.
427 * \return number of written bytes.
428 */
429 static int drm__clients_info(char *buf, char **start, off_t offset,
430 int request, int *eof, void *data)
431 {
432 struct drm_device *dev = (struct drm_device *) data;
433 int len = 0;
434 struct drm_file *priv;
435
436 if (offset > DRM_PROC_LIMIT) {
437 *eof = 1;
438 return 0;
439 }
440
441 *start = &buf[offset];
442 *eof = 0;
443
444 DRM_PROC_PRINT("a dev pid uid magic ioctls\n\n");
445 list_for_each_entry(priv, &dev->filelist, lhead) {
446 DRM_PROC_PRINT("%c %3d %5d %5d %10u %10lu\n",
447 priv->authenticated ? 'y' : 'n',
448 priv->minor,
449 priv->pid,
450 priv->uid, priv->magic, priv->ioctl_count);
451 }
452
453 if (len > request + offset)
454 return request;
455 *eof = 1;
456 return len - offset;
457 }
458
459 /**
460 * Simply calls _clients_info() while holding the drm_device::struct_mutex lock.
461 */
462 static int drm_clients_info(char *buf, char **start, off_t offset,
463 int request, int *eof, void *data)
464 {
465 struct drm_device *dev = (struct drm_device *) data;
466 int ret;
467
468 mutex_lock(&dev->struct_mutex);
469 ret = drm__clients_info(buf, start, offset, request, eof, data);
470 mutex_unlock(&dev->struct_mutex);
471 return ret;
472 }
473
474 #if DRM_DEBUG_CODE
475
476 static int drm__vma_info(char *buf, char **start, off_t offset, int request,
477 int *eof, void *data)
478 {
479 struct drm_device *dev = (struct drm_device *) data;
480 int len = 0;
481 struct drm_vma_entry *pt;
482 struct vm_area_struct *vma;
483 #if defined(__i386__)
484 unsigned int pgprot;
485 #endif
486
487 if (offset > DRM_PROC_LIMIT) {
488 *eof = 1;
489 return 0;
490 }
491
492 *start = &buf[offset];
493 *eof = 0;
494
495 DRM_PROC_PRINT("vma use count: %d, high_memory = %p, 0x%08lx\n",
496 atomic_read(&dev->vma_count),
497 high_memory, virt_to_phys(high_memory));
498 list_for_each_entry(pt, &dev->vmalist, head) {
499 if (!(vma = pt->vma))
500 continue;
501 DRM_PROC_PRINT("\n%5d 0x%08lx-0x%08lx %c%c%c%c%c%c 0x%08lx000",
502 pt->pid,
503 vma->vm_start,
504 vma->vm_end,
505 vma->vm_flags & VM_READ ? 'r' : '-',
506 vma->vm_flags & VM_WRITE ? 'w' : '-',
507 vma->vm_flags & VM_EXEC ? 'x' : '-',
508 vma->vm_flags & VM_MAYSHARE ? 's' : 'p',
509 vma->vm_flags & VM_LOCKED ? 'l' : '-',
510 vma->vm_flags & VM_IO ? 'i' : '-',
511 vma->vm_pgoff);
512
513 #if defined(__i386__)
514 pgprot = pgprot_val(vma->vm_page_prot);
515 DRM_PROC_PRINT(" %c%c%c%c%c%c%c%c%c",
516 pgprot & _PAGE_PRESENT ? 'p' : '-',
517 pgprot & _PAGE_RW ? 'w' : 'r',
518 pgprot & _PAGE_USER ? 'u' : 's',
519 pgprot & _PAGE_PWT ? 't' : 'b',
520 pgprot & _PAGE_PCD ? 'u' : 'c',
521 pgprot & _PAGE_ACCESSED ? 'a' : '-',
522 pgprot & _PAGE_DIRTY ? 'd' : '-',
523 pgprot & _PAGE_PSE ? 'm' : 'k',
524 pgprot & _PAGE_GLOBAL ? 'g' : 'l');
525 #endif
526 DRM_PROC_PRINT("\n");
527 }
528
529 if (len > request + offset)
530 return request;
531 *eof = 1;
532 return len - offset;
533 }
534
535 static int drm_vma_info(char *buf, char **start, off_t offset, int request,
536 int *eof, void *data)
537 {
538 struct drm_device *dev = (struct drm_device *) data;
539 int ret;
540
541 mutex_lock(&dev->struct_mutex);
542 ret = drm__vma_info(buf, start, offset, request, eof, data);
543 mutex_unlock(&dev->struct_mutex);
544 return ret;
545 }
546 #endif
547
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