2 * Created: Fri Jan 8 09:01:26 1999 by faith@valinux.com
4 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
5 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
8 * Author Rickard E. (Rik) Faith <faith@valinux.com>
9 * Author Gareth Hughes <gareth@valinux.com>
11 * Permission is hereby granted, free of charge, to any person obtaining a
12 * copy of this software and associated documentation files (the "Software"),
13 * to deal in the Software without restriction, including without limitation
14 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
15 * and/or sell copies of the Software, and to permit persons to whom the
16 * Software is furnished to do so, subject to the following conditions:
18 * The above copyright notice and this permission notice (including the next
19 * paragraph) shall be included in all copies or substantial portions of the
22 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
23 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
24 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
25 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
26 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
27 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
28 * OTHER DEALINGS IN THE SOFTWARE.
32 #include <drm/drm_core.h>
33 #include "drm_legacy.h"
34 #include "drm_internal.h"
35 #include "drm_crtc_internal.h"
37 #include <linux/pci.h>
38 #include <linux/export.h>
40 static int drm_version(struct drm_device *dev, void *data,
41 struct drm_file *file_priv);
46 * \param inode device inode.
47 * \param file_priv DRM file private.
49 * \param arg user argument, pointing to a drm_unique structure.
50 * \return zero on success or a negative number on failure.
52 * Copies the bus id from drm_device::unique into user space.
54 static int drm_getunique(struct drm_device *dev, void *data,
55 struct drm_file *file_priv)
57 struct drm_unique *u = data;
59 if (u->unique_len >= dev->unique_len) {
60 if (copy_to_user(u->unique, dev->unique, dev->unique_len))
63 u->unique_len = dev->unique_len;
71 * \param inode device inode.
72 * \param file_priv DRM file private.
74 * \param arg user argument, pointing to a drm_unique structure.
75 * \return zero on success or a negative number on failure.
77 * Copies the bus id from userspace into drm_device::unique, and verifies that
78 * it matches the device this DRM is attached to (EINVAL otherwise). Deprecated
79 * in interface version 1.1 and will return EBUSY when setversion has requested
80 * version 1.1 or greater.
82 static int drm_setunique(struct drm_device *dev, void *data,
83 struct drm_file *file_priv)
85 struct drm_unique *u = data;
86 int domain, bus, slot, func, ret;
89 /* Check and copy in the submitted Bus ID */
90 if (!u->unique_len || u->unique_len > 1024)
93 busid = kmalloc(u->unique_len + 1, M_DRM, M_WAITOK);
97 if (copy_from_user(busid, u->unique, u->unique_len)) {
101 busid[u->unique_len] = '\0';
103 /* Return error if the busid submitted doesn't match the device's actual
106 ret = ksscanf(busid, "PCI:%d:%d:%d", &bus, &slot, &func);
114 if ((domain != dev->pci_domain) ||
115 (bus != dev->pci_bus) ||
116 (slot != dev->pci_slot) ||
117 (func != dev->pci_func)) {
122 /* Actually set the device's busid now. */
124 if (dev->unique_len || dev->unique) {
129 dev->unique_len = u->unique_len;
136 static int drm_set_busid(struct drm_device *dev, struct drm_file *file_priv)
141 dev->unique_len = 20;
142 dev->unique = kmalloc(dev->unique_len + 1, M_DRM, M_WAITOK | M_NULLOK);
143 if (dev->unique == NULL) {
148 ksnprintf(dev->unique, dev->unique_len, "pci:%04x:%02x:%02x.%1x",
149 dev->pci_domain, dev->pci_bus, dev->pci_slot, dev->pci_func);
157 * Get client information.
159 * \param inode device inode.
160 * \param file_priv DRM file private.
161 * \param cmd command.
162 * \param arg user argument, pointing to a drm_client structure.
164 * \return zero on success or a negative number on failure.
166 * Searches for the client with the specified index and copies its information
169 static int drm_getclient(struct drm_device *dev, void *data,
170 struct drm_file *file_priv)
172 struct drm_client *client = data;
179 list_for_each_entry(pt, &dev->filelist, lhead) {
181 client->auth = pt->authenticated;
182 client->pid = pt->pid;
183 client->uid = pt->uid;
184 client->magic = pt->magic;
185 client->iocs = pt->ioctl_count;
197 * Get statistics information.
199 * \param inode device inode.
200 * \param file_priv DRM file private.
201 * \param cmd command.
202 * \param arg user argument, pointing to a drm_stats structure.
204 * \return zero on success or a negative number on failure.
206 static int drm_getstats(struct drm_device *dev, void *data,
207 struct drm_file *file_priv)
209 struct drm_stats *stats = data;
212 memset(stats, 0, sizeof(struct drm_stats));
216 for (i = 0; i < dev->counters; i++) {
217 if (dev->types[i] == _DRM_STAT_LOCK)
218 stats->data[i].value =
219 (dev->lock.hw_lock ? dev->lock.hw_lock->lock : 0);
221 stats->data[i].value = atomic_read(&dev->counts[i]);
222 stats->data[i].type = dev->types[i];
225 stats->count = dev->counters;
233 * Get device/driver capabilities
235 static int drm_getcap(struct drm_device *dev, void *data, struct drm_file *file_priv)
237 struct drm_get_cap *req = data;
240 switch (req->capability) {
241 case DRM_CAP_DUMB_BUFFER:
242 if (dev->driver->dumb_create)
245 case DRM_CAP_VBLANK_HIGH_CRTC:
248 case DRM_CAP_DUMB_PREFERRED_DEPTH:
249 req->value = dev->mode_config.preferred_depth;
251 case DRM_CAP_DUMB_PREFER_SHADOW:
252 req->value = dev->mode_config.prefer_shadow;
254 case DRM_CAP_TIMESTAMP_MONOTONIC:
255 req->value = drm_timestamp_monotonic;
257 case DRM_CAP_ASYNC_PAGE_FLIP:
258 req->value = dev->mode_config.async_page_flip;
260 case DRM_CAP_CURSOR_WIDTH:
261 if (dev->mode_config.cursor_width)
262 req->value = dev->mode_config.cursor_width;
266 case DRM_CAP_CURSOR_HEIGHT:
267 if (dev->mode_config.cursor_height)
268 req->value = dev->mode_config.cursor_height;
279 * Set device/driver capabilities
282 drm_setclientcap(struct drm_device *dev, void *data, struct drm_file *file_priv)
284 struct drm_set_client_cap *req = data;
286 switch (req->capability) {
287 case DRM_CLIENT_CAP_STEREO_3D:
290 file_priv->stereo_allowed = req->value;
292 case DRM_CLIENT_CAP_UNIVERSAL_PLANES:
295 file_priv->universal_planes = req->value;
297 case DRM_CLIENT_CAP_ATOMIC:
298 if (!drm_core_check_feature(dev, DRIVER_ATOMIC))
302 file_priv->atomic = req->value;
303 file_priv->universal_planes = req->value;
315 * \param inode device inode.
316 * \param file_priv DRM file private.
317 * \param cmd command.
318 * \param arg user argument, pointing to a drm_lock structure.
319 * \return zero on success or negative number on failure.
321 * Sets the requested interface version
323 static int drm_setversion(struct drm_device *dev, void *data, struct drm_file *file_priv)
325 struct drm_set_version *sv = data;
326 struct drm_set_version ver;
327 int if_version, retcode = 0;
329 /* Save the incoming data, and set the response before continuing
333 sv->drm_di_major = DRM_IF_MAJOR;
334 sv->drm_di_minor = DRM_IF_MINOR;
335 sv->drm_dd_major = dev->driver->major;
336 sv->drm_dd_minor = dev->driver->minor;
338 if (ver.drm_di_major != -1) {
339 if (ver.drm_di_major != DRM_IF_MAJOR ||
340 ver.drm_di_minor < 0 || ver.drm_di_minor > DRM_IF_MINOR) {
343 if_version = DRM_IF_VERSION(ver.drm_di_major,
345 dev->if_version = DRM_MAX(if_version, dev->if_version);
346 if (ver.drm_di_minor >= 1) {
348 * Version 1.1 includes tying of DRM to specific device
349 * Version 1.4 has proper PCI domain support
351 retcode = drm_set_busid(dev, file_priv);
357 if (ver.drm_dd_major != -1) {
358 if (ver.drm_dd_major != dev->driver->major ||
359 ver.drm_dd_minor < 0 ||
360 ver.drm_dd_minor > dev->driver->minor)
370 * drm_noop - DRM no-op ioctl implemntation
371 * @dev: DRM device for the ioctl
372 * @data: data pointer for the ioctl
373 * @file_priv: DRM file for the ioctl call
375 * This no-op implementation for drm ioctls is useful for deprecated
376 * functionality where we can't return a failure code because existing userspace
377 * checks the result of the ioctl, but doesn't care about the action.
379 * Always returns successfully with 0.
381 int drm_noop(struct drm_device *dev, void *data,
382 struct drm_file *file_priv)
387 EXPORT_SYMBOL(drm_noop);
390 * drm_invalid_op - DRM invalid ioctl implemntation
391 * @dev: DRM device for the ioctl
392 * @data: data pointer for the ioctl
393 * @file_priv: DRM file for the ioctl call
395 * This no-op implementation for drm ioctls is useful for deprecated
396 * functionality where we really don't want to allow userspace to call the ioctl
397 * any more. This is the case for old ums interfaces for drivers that
398 * transitioned to kms gradually and so kept the old legacy tables around. This
399 * only applies to radeon and i915 kms drivers, other drivers shouldn't need to
402 * Always fails with a return value of -EINVAL.
404 int drm_invalid_op(struct drm_device *dev, void *data,
405 struct drm_file *file_priv)
409 EXPORT_SYMBOL(drm_invalid_op);
412 * Copy and IOCTL return string to user space
414 static int drm_copy_field(char __user *buf, size_t *buf_len, const char *value)
418 /* don't overflow userbuf */
423 /* let userspace know exact length of driver value (which could be
424 * larger than the userspace-supplied buffer) */
425 *buf_len = strlen(value);
427 /* finally, try filling in the userbuf */
429 if (copy_to_user(buf, value, len))
435 * Get version information
437 * \param inode device inode.
438 * \param filp file pointer.
439 * \param cmd command.
440 * \param arg user argument, pointing to a drm_version structure.
441 * \return zero on success or negative number on failure.
443 * Fills in the version information in \p arg.
445 static int drm_version(struct drm_device *dev, void *data,
446 struct drm_file *file_priv)
448 struct drm_version *version = data;
451 version->version_major = dev->driver->major;
452 version->version_minor = dev->driver->minor;
453 version->version_patchlevel = dev->driver->patchlevel;
454 err = drm_copy_field(version->name, &version->name_len,
457 err = drm_copy_field(version->date, &version->date_len,
460 err = drm_copy_field(version->desc, &version->desc_len,
467 * drm_ioctl_permit - Check ioctl permissions against caller
469 * @flags: ioctl permission flags.
470 * @file_priv: Pointer to struct drm_file identifying the caller.
472 * Checks whether the caller is allowed to run an ioctl with the
473 * indicated permissions. If so, returns zero. Otherwise returns an
474 * error code suitable for ioctl return.
477 int drm_ioctl_permit(u32 flags, struct drm_file *file_priv)
479 /* ROOT_ONLY is only for CAP_SYS_ADMIN */
480 if (unlikely((flags & DRM_ROOT_ONLY) && !capable(CAP_SYS_ADMIN)))
483 /* AUTH is only for authenticated or render client */
484 if (unlikely((flags & DRM_AUTH) && !drm_is_render_client(file_priv) &&
485 !file_priv->authenticated))
488 /* MASTER is only for master or control clients */
489 if (unlikely((flags & DRM_MASTER) && !file_priv->is_master &&
490 !drm_is_control_client(file_priv)))
493 /* Control clients must be explicitly allowed */
494 if (unlikely(!(flags & DRM_CONTROL_ALLOW) &&
495 drm_is_control_client(file_priv)))
498 /* Render clients must be explicitly allowed */
499 if (unlikely(!(flags & DRM_RENDER_ALLOW) &&
500 drm_is_render_client(file_priv)))
505 EXPORT_SYMBOL(drm_ioctl_permit);
508 #define DRM_IOCTL_DEF(ioctl, _func, _flags) \
509 [DRM_IOCTL_NR(ioctl)] = { \
518 static const struct drm_ioctl_desc drm_ioctls[] = {
519 DRM_IOCTL_DEF(DRM_IOCTL_VERSION, drm_version,
520 DRM_UNLOCKED|DRM_RENDER_ALLOW|DRM_CONTROL_ALLOW),
521 DRM_IOCTL_DEF(DRM_IOCTL_GET_UNIQUE, drm_getunique, 0),
522 DRM_IOCTL_DEF(DRM_IOCTL_GET_MAGIC, drm_getmagic, 0),
523 DRM_IOCTL_DEF(DRM_IOCTL_IRQ_BUSID, drm_irq_by_busid, DRM_MASTER|DRM_ROOT_ONLY),
524 DRM_IOCTL_DEF(DRM_IOCTL_GET_MAP, drm_legacy_getmap_ioctl, DRM_UNLOCKED),
525 DRM_IOCTL_DEF(DRM_IOCTL_GET_CLIENT, drm_getclient, DRM_UNLOCKED),
526 DRM_IOCTL_DEF(DRM_IOCTL_GET_STATS, drm_getstats, DRM_UNLOCKED),
527 DRM_IOCTL_DEF(DRM_IOCTL_GET_CAP, drm_getcap, DRM_UNLOCKED|DRM_RENDER_ALLOW),
528 DRM_IOCTL_DEF(DRM_IOCTL_SET_CLIENT_CAP, drm_setclientcap, 0),
529 DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION, drm_setversion, DRM_MASTER),
531 DRM_IOCTL_DEF(DRM_IOCTL_SET_UNIQUE, drm_setunique, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
532 DRM_IOCTL_DEF(DRM_IOCTL_BLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
533 DRM_IOCTL_DEF(DRM_IOCTL_UNBLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
534 DRM_IOCTL_DEF(DRM_IOCTL_AUTH_MAGIC, drm_authmagic, DRM_AUTH|DRM_MASTER),
536 DRM_IOCTL_DEF(DRM_IOCTL_ADD_MAP, drm_legacy_addmap_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
537 DRM_IOCTL_DEF(DRM_IOCTL_RM_MAP, drm_legacy_rmmap_ioctl, DRM_AUTH),
539 DRM_IOCTL_DEF(DRM_IOCTL_SET_SAREA_CTX, drm_legacy_setsareactx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
540 DRM_IOCTL_DEF(DRM_IOCTL_GET_SAREA_CTX, drm_legacy_getsareactx, DRM_AUTH),
542 DRM_IOCTL_DEF(DRM_IOCTL_SET_MASTER, drm_setmaster_ioctl, DRM_ROOT_ONLY),
543 DRM_IOCTL_DEF(DRM_IOCTL_DROP_MASTER, drm_dropmaster_ioctl, DRM_ROOT_ONLY),
545 DRM_IOCTL_DEF(DRM_IOCTL_ADD_CTX, drm_legacy_addctx, DRM_AUTH|DRM_ROOT_ONLY),
546 DRM_IOCTL_DEF(DRM_IOCTL_RM_CTX, drm_legacy_rmctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
547 DRM_IOCTL_DEF(DRM_IOCTL_MOD_CTX, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
548 DRM_IOCTL_DEF(DRM_IOCTL_GET_CTX, drm_legacy_getctx, DRM_AUTH),
549 DRM_IOCTL_DEF(DRM_IOCTL_SWITCH_CTX, drm_legacy_switchctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
550 DRM_IOCTL_DEF(DRM_IOCTL_NEW_CTX, drm_legacy_newctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
551 DRM_IOCTL_DEF(DRM_IOCTL_RES_CTX, drm_legacy_resctx, DRM_AUTH),
553 DRM_IOCTL_DEF(DRM_IOCTL_ADD_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
554 DRM_IOCTL_DEF(DRM_IOCTL_RM_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
556 DRM_IOCTL_DEF(DRM_IOCTL_LOCK, drm_legacy_lock, DRM_AUTH),
557 DRM_IOCTL_DEF(DRM_IOCTL_UNLOCK, drm_legacy_unlock, DRM_AUTH),
559 DRM_IOCTL_DEF(DRM_IOCTL_FINISH, drm_noop, DRM_AUTH),
561 DRM_IOCTL_DEF(DRM_IOCTL_ADD_BUFS, drm_legacy_addbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
562 DRM_IOCTL_DEF(DRM_IOCTL_MARK_BUFS, drm_legacy_markbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
563 DRM_IOCTL_DEF(DRM_IOCTL_INFO_BUFS, drm_legacy_infobufs, DRM_AUTH),
564 DRM_IOCTL_DEF(DRM_IOCTL_MAP_BUFS, drm_legacy_mapbufs, DRM_AUTH),
565 DRM_IOCTL_DEF(DRM_IOCTL_FREE_BUFS, drm_legacy_freebufs, DRM_AUTH),
566 DRM_IOCTL_DEF(DRM_IOCTL_DMA, drm_legacy_dma_ioctl, DRM_AUTH),
568 DRM_IOCTL_DEF(DRM_IOCTL_CONTROL, drm_control, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
570 #if IS_ENABLED(CONFIG_AGP)
571 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ACQUIRE, drm_agp_acquire_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
572 DRM_IOCTL_DEF(DRM_IOCTL_AGP_RELEASE, drm_agp_release_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
573 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ENABLE, drm_agp_enable_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
574 DRM_IOCTL_DEF(DRM_IOCTL_AGP_INFO, drm_agp_info_ioctl, DRM_AUTH),
575 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ALLOC, drm_agp_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
576 DRM_IOCTL_DEF(DRM_IOCTL_AGP_FREE, drm_agp_free_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
577 DRM_IOCTL_DEF(DRM_IOCTL_AGP_BIND, drm_agp_bind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
578 DRM_IOCTL_DEF(DRM_IOCTL_AGP_UNBIND, drm_agp_unbind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
581 DRM_IOCTL_DEF(DRM_IOCTL_SG_ALLOC, drm_legacy_sg_alloc, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
582 DRM_IOCTL_DEF(DRM_IOCTL_SG_FREE, drm_legacy_sg_free, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
584 DRM_IOCTL_DEF(DRM_IOCTL_WAIT_VBLANK, drm_wait_vblank, DRM_UNLOCKED),
586 DRM_IOCTL_DEF(DRM_IOCTL_MODESET_CTL, drm_modeset_ctl, 0),
588 DRM_IOCTL_DEF(DRM_IOCTL_UPDATE_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
590 DRM_IOCTL_DEF(DRM_IOCTL_GEM_CLOSE, drm_gem_close_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
591 DRM_IOCTL_DEF(DRM_IOCTL_GEM_FLINK, drm_gem_flink_ioctl, DRM_AUTH|DRM_UNLOCKED),
592 DRM_IOCTL_DEF(DRM_IOCTL_GEM_OPEN, drm_gem_open_ioctl, DRM_AUTH|DRM_UNLOCKED),
594 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETRESOURCES, drm_mode_getresources, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
597 DRM_IOCTL_DEF(DRM_IOCTL_PRIME_HANDLE_TO_FD, drm_prime_handle_to_fd_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
598 DRM_IOCTL_DEF(DRM_IOCTL_PRIME_FD_TO_HANDLE, drm_prime_fd_to_handle_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
601 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANERESOURCES, drm_mode_getplane_res, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
602 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCRTC, drm_mode_getcrtc, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
603 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETCRTC, drm_mode_setcrtc, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
604 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANE, drm_mode_getplane, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
605 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPLANE, drm_mode_setplane, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
606 DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR, drm_mode_cursor_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
607 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETGAMMA, drm_mode_gamma_get_ioctl, DRM_UNLOCKED),
608 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETGAMMA, drm_mode_gamma_set_ioctl, DRM_MASTER|DRM_UNLOCKED),
609 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETENCODER, drm_mode_getencoder, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
610 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCONNECTOR, drm_mode_getconnector, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
611 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATTACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
612 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DETACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
613 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPERTY, drm_mode_getproperty_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
614 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPROPERTY, drm_mode_connector_property_set_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
615 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPBLOB, drm_mode_getblob_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
616 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETFB, drm_mode_getfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
617 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB, drm_mode_addfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
618 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB2, drm_mode_addfb2, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
619 DRM_IOCTL_DEF(DRM_IOCTL_MODE_RMFB, drm_mode_rmfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
620 DRM_IOCTL_DEF(DRM_IOCTL_MODE_PAGE_FLIP, drm_mode_page_flip_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
621 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DIRTYFB, drm_mode_dirtyfb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
622 DRM_IOCTL_DEF(DRM_IOCTL_MODE_CREATE_DUMB, drm_mode_create_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
623 DRM_IOCTL_DEF(DRM_IOCTL_MODE_MAP_DUMB, drm_mode_mmap_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
624 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DESTROY_DUMB, drm_mode_destroy_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
625 DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_GETPROPERTIES, drm_mode_obj_get_properties_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
626 DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_SETPROPERTY, drm_mode_obj_set_property_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
627 DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR2, drm_mode_cursor2_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
628 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATOMIC, drm_mode_atomic_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
629 DRM_IOCTL_DEF(DRM_IOCTL_MODE_CREATEPROPBLOB, drm_mode_createblob_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
630 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DESTROYPROPBLOB, drm_mode_destroyblob_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
633 #define DRM_CORE_IOCTL_COUNT ARRAY_SIZE( drm_ioctls )
636 * drm_ioctl - ioctl callback implementation for DRM drivers
637 * @filp: file this ioctl is called on
638 * @cmd: ioctl cmd number
639 * @arg: user argument
641 * Looks up the ioctl function in the ::ioctls table, checking for root
642 * previleges if so required, and dispatches to the respective function.
645 * Zero on success, negative error code on failure.
647 int drm_ioctl(struct dev_ioctl_args *ap)
649 struct file *filp = ap->a_fp;
650 struct drm_file *file_priv = filp->private_data;
651 struct cdev *kdev = ap->a_head.a_dev;
652 struct drm_device *dev;
653 const struct drm_ioctl_desc *ioctl = NULL;
654 u_long cmd = ap->a_cmd;
655 unsigned int nr = DRM_IOCTL_NR(cmd);
657 caddr_t data = ap->a_data;
658 int (*func)(struct drm_device *dev, void *data, struct drm_file *file_priv);
659 bool is_driver_ioctl;
661 dev = drm_get_device_from_kdev(kdev);
663 atomic_inc(&dev->counts[_DRM_STAT_IOCTLS]);
665 if (drm_device_is_unplugged(dev))
668 is_driver_ioctl = nr >= DRM_COMMAND_BASE && nr < DRM_COMMAND_END;
670 if (IOCGROUP(cmd) != DRM_IOCTL_BASE) {
671 DRM_DEBUG_FIOCTL("Bad ioctl group 0x%x\n", (int)IOCGROUP(cmd));
675 ioctl = &drm_ioctls[nr];
676 /* It's not a core DRM ioctl, try driver-specific. */
677 if (ioctl->func == NULL && nr >= DRM_COMMAND_BASE) {
678 /* The array entries begin at DRM_COMMAND_BASE ioctl nr */
679 nr -= DRM_COMMAND_BASE;
680 if (nr >= dev->driver->num_ioctls) {
683 ioctl = &dev->driver->ioctls[nr];
687 DRM_DEBUG_IOCTL("pid=%d, dev=0x%lx, auth=%d, %s\n",
688 DRM_CURRENTPID, (long)dev->dev,
689 file_priv->authenticated, ioctl->name);
691 /* Do not trust userspace, use our own definition */
694 if (unlikely(!func)) {
695 DRM_DEBUG("no function\n");
700 if (((ioctl->flags & DRM_ROOT_ONLY) && !capable(CAP_SYS_ADMIN)) ||
701 ((ioctl->flags & DRM_AUTH) && !file_priv->authenticated) ||
702 ((ioctl->flags & DRM_MASTER) && !file_priv->master))
705 /* Enforce sane locking for kms driver ioctls. Core ioctls are
706 * too messy still. */
707 if (is_driver_ioctl) {
708 if ((ioctl->flags & DRM_UNLOCKED) == 0)
709 mutex_lock(&drm_global_mutex);
710 /* shared code returns -errno */
711 retcode = -func(dev, data, file_priv);
712 if (retcode == ERESTARTSYS)
714 if ((ioctl->flags & DRM_UNLOCKED) == 0)
715 mutex_unlock(&drm_global_mutex);
717 retcode = -func(dev, data, file_priv);
718 if (retcode == ERESTARTSYS)
724 DRM_DEBUG_FIOCTL("invalid ioctl: pid=%d, dev=0x%lx, auth=%d, cmd=0x%02lx, nr=0x%02x\n",
727 file_priv->authenticated, cmd, nr);
730 DRM_DEBUG_FIOCTL("ret = %d\n", retcode);
733 EXPORT_SYMBOL(drm_ioctl);
736 * drm_ioctl_flags - Check for core ioctl and return ioctl permission flags
738 * @flags: where to return the ioctl permission flags
740 * This ioctl is only used by the vmwgfx driver to augment the access checks
741 * done by the drm core and insofar a pretty decent layering violation. This
742 * shouldn't be used by any drivers.
745 * True if the @nr corresponds to a DRM core ioctl numer, false otherwise.
747 bool drm_ioctl_flags(unsigned int nr, unsigned int *flags)
749 if ((nr >= DRM_COMMAND_END && nr < DRM_CORE_IOCTL_COUNT) ||
750 (nr < DRM_COMMAND_BASE)) {
751 *flags = drm_ioctls[nr].flags;
757 EXPORT_SYMBOL(drm_ioctl_flags);