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31#include <drm/drmP.h>
32#include <drm/drm_core.h>
33#include <drm/drm_auth.h>
34#include "drm_legacy.h"
35#include "drm_internal.h"
36#include "drm_crtc_internal.h"
37
38#include <linux/pci.h>
39#include <linux/export.h>
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99static int drm_version(struct drm_device *dev, void *data,
100 struct drm_file *file_priv);
101
102
103
104
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111
112
113static int drm_getunique(struct drm_device *dev, void *data,
114 struct drm_file *file_priv)
115{
116 struct drm_unique *u = data;
117 struct drm_master *master = file_priv->master;
118
119 if (u->unique_len >= master->unique_len) {
120 if (copy_to_user(u->unique, master->unique, master->unique_len))
121 return -EFAULT;
122 }
123 u->unique_len = master->unique_len;
124
125 return 0;
126}
127
128static void
129drm_unset_busid(struct drm_device *dev,
130 struct drm_master *master)
131{
132 kfree(master->unique);
133 master->unique = NULL;
134 master->unique_len = 0;
135}
136
137static int drm_set_busid(struct drm_device *dev, struct drm_file *file_priv)
138{
139 struct drm_master *master = file_priv->master;
140 int ret;
141
142 if (master->unique != NULL)
143 drm_unset_busid(dev, master);
144
145 if (dev->driver->set_busid) {
146 ret = dev->driver->set_busid(dev, master);
147 if (ret) {
148 drm_unset_busid(dev, master);
149 return ret;
150 }
151 } else {
152 WARN_ON(!dev->unique);
153 master->unique = kstrdup(dev->unique, GFP_KERNEL);
154 if (master->unique)
155 master->unique_len = strlen(dev->unique);
156 }
157
158 return 0;
159}
160
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173
174static int drm_getclient(struct drm_device *dev, void *data,
175 struct drm_file *file_priv)
176{
177 struct drm_client *client = data;
178
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188
189
190 if (client->idx == 0) {
191 client->auth = file_priv->authenticated;
192 client->pid = pid_vnr(file_priv->pid);
193 client->uid = from_kuid_munged(current_user_ns(),
194 file_priv->uid);
195 client->magic = 0;
196 client->iocs = 0;
197
198 return 0;
199 } else {
200 return -EINVAL;
201 }
202}
203
204
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212
213
214static int drm_getstats(struct drm_device *dev, void *data,
215 struct drm_file *file_priv)
216{
217 struct drm_stats *stats = data;
218
219
220 memset(stats, 0, sizeof(*stats));
221
222 return 0;
223}
224
225
226
227
228static int drm_getcap(struct drm_device *dev, void *data, struct drm_file *file_priv)
229{
230 struct drm_get_cap *req = data;
231
232 req->value = 0;
233 switch (req->capability) {
234 case DRM_CAP_DUMB_BUFFER:
235 if (dev->driver->dumb_create)
236 req->value = 1;
237 break;
238 case DRM_CAP_VBLANK_HIGH_CRTC:
239 req->value = 1;
240 break;
241 case DRM_CAP_DUMB_PREFERRED_DEPTH:
242 req->value = dev->mode_config.preferred_depth;
243 break;
244 case DRM_CAP_DUMB_PREFER_SHADOW:
245 req->value = dev->mode_config.prefer_shadow;
246 break;
247 case DRM_CAP_PRIME:
248 req->value |= dev->driver->prime_fd_to_handle ? DRM_PRIME_CAP_IMPORT : 0;
249 req->value |= dev->driver->prime_handle_to_fd ? DRM_PRIME_CAP_EXPORT : 0;
250 break;
251 case DRM_CAP_TIMESTAMP_MONOTONIC:
252 req->value = drm_timestamp_monotonic;
253 break;
254 case DRM_CAP_ASYNC_PAGE_FLIP:
255 req->value = dev->mode_config.async_page_flip;
256 break;
257 case DRM_CAP_CURSOR_WIDTH:
258 if (dev->mode_config.cursor_width)
259 req->value = dev->mode_config.cursor_width;
260 else
261 req->value = 64;
262 break;
263 case DRM_CAP_CURSOR_HEIGHT:
264 if (dev->mode_config.cursor_height)
265 req->value = dev->mode_config.cursor_height;
266 else
267 req->value = 64;
268 break;
269 case DRM_CAP_ADDFB2_MODIFIERS:
270 req->value = dev->mode_config.allow_fb_modifiers;
271 break;
272 default:
273 return -EINVAL;
274 }
275 return 0;
276}
277
278
279
280
281static int
282drm_setclientcap(struct drm_device *dev, void *data, struct drm_file *file_priv)
283{
284 struct drm_set_client_cap *req = data;
285
286 switch (req->capability) {
287 case DRM_CLIENT_CAP_STEREO_3D:
288 if (req->value > 1)
289 return -EINVAL;
290 file_priv->stereo_allowed = req->value;
291 break;
292 case DRM_CLIENT_CAP_UNIVERSAL_PLANES:
293 if (req->value > 1)
294 return -EINVAL;
295 file_priv->universal_planes = req->value;
296 break;
297 case DRM_CLIENT_CAP_ATOMIC:
298 if (!drm_core_check_feature(dev, DRIVER_ATOMIC))
299 return -EINVAL;
300 if (req->value > 1)
301 return -EINVAL;
302 file_priv->atomic = req->value;
303 file_priv->universal_planes = req->value;
304 break;
305 default:
306 return -EINVAL;
307 }
308
309 return 0;
310}
311
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321
322
323static int drm_setversion(struct drm_device *dev, void *data, struct drm_file *file_priv)
324{
325 struct drm_set_version *sv = data;
326 int if_version, retcode = 0;
327
328 if (sv->drm_di_major != -1) {
329 if (sv->drm_di_major != DRM_IF_MAJOR ||
330 sv->drm_di_minor < 0 || sv->drm_di_minor > DRM_IF_MINOR) {
331 retcode = -EINVAL;
332 goto done;
333 }
334 if_version = DRM_IF_VERSION(sv->drm_di_major,
335 sv->drm_di_minor);
336 dev->if_version = max(if_version, dev->if_version);
337 if (sv->drm_di_minor >= 1) {
338
339
340
341
342 retcode = drm_set_busid(dev, file_priv);
343 if (retcode)
344 goto done;
345 }
346 }
347
348 if (sv->drm_dd_major != -1) {
349 if (sv->drm_dd_major != dev->driver->major ||
350 sv->drm_dd_minor < 0 || sv->drm_dd_minor >
351 dev->driver->minor) {
352 retcode = -EINVAL;
353 goto done;
354 }
355 }
356
357done:
358 sv->drm_di_major = DRM_IF_MAJOR;
359 sv->drm_di_minor = DRM_IF_MINOR;
360 sv->drm_dd_major = dev->driver->major;
361 sv->drm_dd_minor = dev->driver->minor;
362
363 return retcode;
364}
365
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377
378int drm_noop(struct drm_device *dev, void *data,
379 struct drm_file *file_priv)
380{
381 DRM_DEBUG("\n");
382 return 0;
383}
384EXPORT_SYMBOL(drm_noop);
385
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401int drm_invalid_op(struct drm_device *dev, void *data,
402 struct drm_file *file_priv)
403{
404 return -EINVAL;
405}
406EXPORT_SYMBOL(drm_invalid_op);
407
408
409
410
411static int drm_copy_field(char __user *buf, size_t *buf_len, const char *value)
412{
413 int len;
414
415
416 len = strlen(value);
417 if (len > *buf_len)
418 len = *buf_len;
419
420
421
422 *buf_len = strlen(value);
423
424
425 if (len && buf)
426 if (copy_to_user(buf, value, len))
427 return -EFAULT;
428 return 0;
429}
430
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441
442static int drm_version(struct drm_device *dev, void *data,
443 struct drm_file *file_priv)
444{
445 struct drm_version *version = data;
446 int err;
447
448 version->version_major = dev->driver->major;
449 version->version_minor = dev->driver->minor;
450 version->version_patchlevel = dev->driver->patchlevel;
451 err = drm_copy_field(version->name, &version->name_len,
452 dev->driver->name);
453 if (!err)
454 err = drm_copy_field(version->date, &version->date_len,
455 dev->driver->date);
456 if (!err)
457 err = drm_copy_field(version->desc, &version->desc_len,
458 dev->driver->desc);
459
460 return err;
461}
462
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472
473int drm_ioctl_permit(u32 flags, struct drm_file *file_priv)
474{
475
476 if (unlikely((flags & DRM_ROOT_ONLY) && !capable(CAP_SYS_ADMIN)))
477 return -EACCES;
478
479
480 if (unlikely((flags & DRM_AUTH) && !drm_is_render_client(file_priv) &&
481 !file_priv->authenticated))
482 return -EACCES;
483
484
485 if (unlikely((flags & DRM_MASTER) &&
486 !drm_is_current_master(file_priv) &&
487 !drm_is_control_client(file_priv)))
488 return -EACCES;
489
490
491 if (unlikely(!(flags & DRM_CONTROL_ALLOW) &&
492 drm_is_control_client(file_priv)))
493 return -EACCES;
494
495
496 if (unlikely(!(flags & DRM_RENDER_ALLOW) &&
497 drm_is_render_client(file_priv)))
498 return -EACCES;
499
500 return 0;
501}
502EXPORT_SYMBOL(drm_ioctl_permit);
503
504#define DRM_IOCTL_DEF(ioctl, _func, _flags) \
505 [DRM_IOCTL_NR(ioctl)] = { \
506 .cmd = ioctl, \
507 .func = _func, \
508 .flags = _flags, \
509 .name = #ioctl \
510 }
511
512
513static const struct drm_ioctl_desc drm_ioctls[] = {
514 DRM_IOCTL_DEF(DRM_IOCTL_VERSION, drm_version,
515 DRM_UNLOCKED|DRM_RENDER_ALLOW|DRM_CONTROL_ALLOW),
516 DRM_IOCTL_DEF(DRM_IOCTL_GET_UNIQUE, drm_getunique, 0),
517 DRM_IOCTL_DEF(DRM_IOCTL_GET_MAGIC, drm_getmagic, DRM_UNLOCKED),
518 DRM_IOCTL_DEF(DRM_IOCTL_IRQ_BUSID, drm_irq_by_busid, DRM_MASTER|DRM_ROOT_ONLY),
519 DRM_IOCTL_DEF(DRM_IOCTL_GET_MAP, drm_legacy_getmap_ioctl, DRM_UNLOCKED),
520 DRM_IOCTL_DEF(DRM_IOCTL_GET_CLIENT, drm_getclient, DRM_UNLOCKED),
521 DRM_IOCTL_DEF(DRM_IOCTL_GET_STATS, drm_getstats, DRM_UNLOCKED),
522 DRM_IOCTL_DEF(DRM_IOCTL_GET_CAP, drm_getcap, DRM_UNLOCKED|DRM_RENDER_ALLOW),
523 DRM_IOCTL_DEF(DRM_IOCTL_SET_CLIENT_CAP, drm_setclientcap, 0),
524 DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION, drm_setversion, DRM_MASTER),
525
526 DRM_IOCTL_DEF(DRM_IOCTL_SET_UNIQUE, drm_invalid_op, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
527 DRM_IOCTL_DEF(DRM_IOCTL_BLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
528 DRM_IOCTL_DEF(DRM_IOCTL_UNBLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
529 DRM_IOCTL_DEF(DRM_IOCTL_AUTH_MAGIC, drm_authmagic, DRM_AUTH|DRM_UNLOCKED|DRM_MASTER),
530
531 DRM_IOCTL_DEF(DRM_IOCTL_ADD_MAP, drm_legacy_addmap_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
532 DRM_IOCTL_DEF(DRM_IOCTL_RM_MAP, drm_legacy_rmmap_ioctl, DRM_AUTH),
533
534 DRM_IOCTL_DEF(DRM_IOCTL_SET_SAREA_CTX, drm_legacy_setsareactx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
535 DRM_IOCTL_DEF(DRM_IOCTL_GET_SAREA_CTX, drm_legacy_getsareactx, DRM_AUTH),
536
537 DRM_IOCTL_DEF(DRM_IOCTL_SET_MASTER, drm_setmaster_ioctl, DRM_UNLOCKED|DRM_ROOT_ONLY),
538 DRM_IOCTL_DEF(DRM_IOCTL_DROP_MASTER, drm_dropmaster_ioctl, DRM_UNLOCKED|DRM_ROOT_ONLY),
539
540 DRM_IOCTL_DEF(DRM_IOCTL_ADD_CTX, drm_legacy_addctx, DRM_AUTH|DRM_ROOT_ONLY),
541 DRM_IOCTL_DEF(DRM_IOCTL_RM_CTX, drm_legacy_rmctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
542 DRM_IOCTL_DEF(DRM_IOCTL_MOD_CTX, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
543 DRM_IOCTL_DEF(DRM_IOCTL_GET_CTX, drm_legacy_getctx, DRM_AUTH),
544 DRM_IOCTL_DEF(DRM_IOCTL_SWITCH_CTX, drm_legacy_switchctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
545 DRM_IOCTL_DEF(DRM_IOCTL_NEW_CTX, drm_legacy_newctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
546 DRM_IOCTL_DEF(DRM_IOCTL_RES_CTX, drm_legacy_resctx, DRM_AUTH),
547
548 DRM_IOCTL_DEF(DRM_IOCTL_ADD_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
549 DRM_IOCTL_DEF(DRM_IOCTL_RM_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
550
551 DRM_IOCTL_DEF(DRM_IOCTL_LOCK, drm_legacy_lock, DRM_AUTH),
552 DRM_IOCTL_DEF(DRM_IOCTL_UNLOCK, drm_legacy_unlock, DRM_AUTH),
553
554 DRM_IOCTL_DEF(DRM_IOCTL_FINISH, drm_noop, DRM_AUTH),
555
556 DRM_IOCTL_DEF(DRM_IOCTL_ADD_BUFS, drm_legacy_addbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
557 DRM_IOCTL_DEF(DRM_IOCTL_MARK_BUFS, drm_legacy_markbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
558 DRM_IOCTL_DEF(DRM_IOCTL_INFO_BUFS, drm_legacy_infobufs, DRM_AUTH),
559 DRM_IOCTL_DEF(DRM_IOCTL_MAP_BUFS, drm_legacy_mapbufs, DRM_AUTH),
560 DRM_IOCTL_DEF(DRM_IOCTL_FREE_BUFS, drm_legacy_freebufs, DRM_AUTH),
561 DRM_IOCTL_DEF(DRM_IOCTL_DMA, drm_legacy_dma_ioctl, DRM_AUTH),
562
563 DRM_IOCTL_DEF(DRM_IOCTL_CONTROL, drm_control, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
564
565#if IS_ENABLED(CONFIG_AGP)
566 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ACQUIRE, drm_agp_acquire_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
567 DRM_IOCTL_DEF(DRM_IOCTL_AGP_RELEASE, drm_agp_release_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
568 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ENABLE, drm_agp_enable_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
569 DRM_IOCTL_DEF(DRM_IOCTL_AGP_INFO, drm_agp_info_ioctl, DRM_AUTH),
570 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ALLOC, drm_agp_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
571 DRM_IOCTL_DEF(DRM_IOCTL_AGP_FREE, drm_agp_free_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
572 DRM_IOCTL_DEF(DRM_IOCTL_AGP_BIND, drm_agp_bind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
573 DRM_IOCTL_DEF(DRM_IOCTL_AGP_UNBIND, drm_agp_unbind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
574#endif
575
576 DRM_IOCTL_DEF(DRM_IOCTL_SG_ALLOC, drm_legacy_sg_alloc, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
577 DRM_IOCTL_DEF(DRM_IOCTL_SG_FREE, drm_legacy_sg_free, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
578
579 DRM_IOCTL_DEF(DRM_IOCTL_WAIT_VBLANK, drm_wait_vblank, DRM_UNLOCKED),
580
581 DRM_IOCTL_DEF(DRM_IOCTL_MODESET_CTL, drm_modeset_ctl, 0),
582
583 DRM_IOCTL_DEF(DRM_IOCTL_UPDATE_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
584
585 DRM_IOCTL_DEF(DRM_IOCTL_GEM_CLOSE, drm_gem_close_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
586 DRM_IOCTL_DEF(DRM_IOCTL_GEM_FLINK, drm_gem_flink_ioctl, DRM_AUTH|DRM_UNLOCKED),
587 DRM_IOCTL_DEF(DRM_IOCTL_GEM_OPEN, drm_gem_open_ioctl, DRM_AUTH|DRM_UNLOCKED),
588
589 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETRESOURCES, drm_mode_getresources, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
590
591 DRM_IOCTL_DEF(DRM_IOCTL_PRIME_HANDLE_TO_FD, drm_prime_handle_to_fd_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
592 DRM_IOCTL_DEF(DRM_IOCTL_PRIME_FD_TO_HANDLE, drm_prime_fd_to_handle_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
593
594 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANERESOURCES, drm_mode_getplane_res, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
595 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCRTC, drm_mode_getcrtc, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
596 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETCRTC, drm_mode_setcrtc, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
597 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANE, drm_mode_getplane, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
598 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPLANE, drm_mode_setplane, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
599 DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR, drm_mode_cursor_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
600 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETGAMMA, drm_mode_gamma_get_ioctl, DRM_UNLOCKED),
601 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETGAMMA, drm_mode_gamma_set_ioctl, DRM_MASTER|DRM_UNLOCKED),
602 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETENCODER, drm_mode_getencoder, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
603 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCONNECTOR, drm_mode_getconnector, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
604 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATTACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
605 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DETACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
606 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPERTY, drm_mode_getproperty_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
607 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPROPERTY, drm_mode_connector_property_set_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
608 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPBLOB, drm_mode_getblob_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
609 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETFB, drm_mode_getfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
610 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB, drm_mode_addfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
611 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB2, drm_mode_addfb2, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
612 DRM_IOCTL_DEF(DRM_IOCTL_MODE_RMFB, drm_mode_rmfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
613 DRM_IOCTL_DEF(DRM_IOCTL_MODE_PAGE_FLIP, drm_mode_page_flip_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
614 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DIRTYFB, drm_mode_dirtyfb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
615 DRM_IOCTL_DEF(DRM_IOCTL_MODE_CREATE_DUMB, drm_mode_create_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
616 DRM_IOCTL_DEF(DRM_IOCTL_MODE_MAP_DUMB, drm_mode_mmap_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
617 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DESTROY_DUMB, drm_mode_destroy_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
618 DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_GETPROPERTIES, drm_mode_obj_get_properties_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
619 DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_SETPROPERTY, drm_mode_obj_set_property_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
620 DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR2, drm_mode_cursor2_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
621 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATOMIC, drm_mode_atomic_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
622 DRM_IOCTL_DEF(DRM_IOCTL_MODE_CREATEPROPBLOB, drm_mode_createblob_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
623 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DESTROYPROPBLOB, drm_mode_destroyblob_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
624};
625
626#define DRM_CORE_IOCTL_COUNT ARRAY_SIZE( drm_ioctls )
627
628
629
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631
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638
639
640long drm_ioctl(struct file *filp,
641 unsigned int cmd, unsigned long arg)
642{
643 struct drm_file *file_priv = filp->private_data;
644 struct drm_device *dev;
645 const struct drm_ioctl_desc *ioctl = NULL;
646 drm_ioctl_t *func;
647 unsigned int nr = DRM_IOCTL_NR(cmd);
648 int retcode = -EINVAL;
649 char stack_kdata[128];
650 char *kdata = NULL;
651 unsigned int in_size, out_size, drv_size, ksize;
652 bool is_driver_ioctl;
653
654 dev = file_priv->minor->dev;
655
656 if (drm_device_is_unplugged(dev))
657 return -ENODEV;
658
659 is_driver_ioctl = nr >= DRM_COMMAND_BASE && nr < DRM_COMMAND_END;
660
661 if (is_driver_ioctl) {
662
663 if (nr - DRM_COMMAND_BASE >= dev->driver->num_ioctls)
664 goto err_i1;
665 ioctl = &dev->driver->ioctls[nr - DRM_COMMAND_BASE];
666 } else {
667
668 if (nr >= DRM_CORE_IOCTL_COUNT)
669 goto err_i1;
670 ioctl = &drm_ioctls[nr];
671 }
672
673 drv_size = _IOC_SIZE(ioctl->cmd);
674 out_size = in_size = _IOC_SIZE(cmd);
675 if ((cmd & ioctl->cmd & IOC_IN) == 0)
676 in_size = 0;
677 if ((cmd & ioctl->cmd & IOC_OUT) == 0)
678 out_size = 0;
679 ksize = max(max(in_size, out_size), drv_size);
680
681 DRM_DEBUG("pid=%d, dev=0x%lx, auth=%d, %s\n",
682 task_pid_nr(current),
683 (long)old_encode_dev(file_priv->minor->kdev->devt),
684 file_priv->authenticated, ioctl->name);
685
686
687 func = ioctl->func;
688
689 if (unlikely(!func)) {
690 DRM_DEBUG("no function\n");
691 retcode = -EINVAL;
692 goto err_i1;
693 }
694
695 retcode = drm_ioctl_permit(ioctl->flags, file_priv);
696 if (unlikely(retcode))
697 goto err_i1;
698
699 if (ksize <= sizeof(stack_kdata)) {
700 kdata = stack_kdata;
701 } else {
702 kdata = kmalloc(ksize, GFP_KERNEL);
703 if (!kdata) {
704 retcode = -ENOMEM;
705 goto err_i1;
706 }
707 }
708
709 if (copy_from_user(kdata, (void __user *)arg, in_size) != 0) {
710 retcode = -EFAULT;
711 goto err_i1;
712 }
713
714 if (ksize > in_size)
715 memset(kdata + in_size, 0, ksize - in_size);
716
717
718
719 if ((drm_core_check_feature(dev, DRIVER_MODESET) && is_driver_ioctl) ||
720 (ioctl->flags & DRM_UNLOCKED))
721 retcode = func(dev, kdata, file_priv);
722 else {
723 mutex_lock(&drm_global_mutex);
724 retcode = func(dev, kdata, file_priv);
725 mutex_unlock(&drm_global_mutex);
726 }
727
728 if (copy_to_user((void __user *)arg, kdata, out_size) != 0)
729 retcode = -EFAULT;
730
731 err_i1:
732 if (!ioctl)
733 DRM_DEBUG("invalid ioctl: pid=%d, dev=0x%lx, auth=%d, cmd=0x%02x, nr=0x%02x\n",
734 task_pid_nr(current),
735 (long)old_encode_dev(file_priv->minor->kdev->devt),
736 file_priv->authenticated, cmd, nr);
737
738 if (kdata != stack_kdata)
739 kfree(kdata);
740 if (retcode)
741 DRM_DEBUG("ret = %d\n", retcode);
742 return retcode;
743}
744EXPORT_SYMBOL(drm_ioctl);
745
746
747
748
749
750
751
752
753
754
755
756
757
758bool drm_ioctl_flags(unsigned int nr, unsigned int *flags)
759{
760 if (nr >= DRM_COMMAND_BASE && nr < DRM_COMMAND_END)
761 return false;
762
763 if (nr >= DRM_CORE_IOCTL_COUNT)
764 return false;
765
766 *flags = drm_ioctls[nr].flags;
767 return true;
768}
769EXPORT_SYMBOL(drm_ioctl_flags);
770