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>
34 #include <linux/pci.h>
35 #include <linux/export.h>
40 static int drm_version(struct drm_device *dev, void *data,
41 struct drm_file *file_priv);
43 #define DRM_IOCTL_DEF(ioctl, _func, _flags) \
44 [DRM_IOCTL_NR(ioctl)] = {.cmd = ioctl, .func = _func, .flags = _flags, .cmd_drv = 0, .name = #ioctl}
47 static const struct drm_ioctl_desc drm_ioctls[] = {
48 DRM_IOCTL_DEF(DRM_IOCTL_VERSION, drm_version, DRM_UNLOCKED|DRM_RENDER_ALLOW),
49 DRM_IOCTL_DEF(DRM_IOCTL_GET_UNIQUE, drm_getunique, 0),
50 DRM_IOCTL_DEF(DRM_IOCTL_GET_MAGIC, drm_getmagic, 0),
51 DRM_IOCTL_DEF(DRM_IOCTL_IRQ_BUSID, drm_irq_by_busid, DRM_MASTER|DRM_ROOT_ONLY),
52 DRM_IOCTL_DEF(DRM_IOCTL_GET_MAP, drm_getmap, DRM_UNLOCKED),
53 DRM_IOCTL_DEF(DRM_IOCTL_GET_CLIENT, drm_getclient, DRM_UNLOCKED),
54 DRM_IOCTL_DEF(DRM_IOCTL_GET_STATS, drm_getstats, DRM_UNLOCKED),
55 DRM_IOCTL_DEF(DRM_IOCTL_GET_CAP, drm_getcap, DRM_UNLOCKED|DRM_RENDER_ALLOW),
56 DRM_IOCTL_DEF(DRM_IOCTL_SET_CLIENT_CAP, drm_setclientcap, 0),
57 DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION, drm_setversion, DRM_MASTER),
59 DRM_IOCTL_DEF(DRM_IOCTL_SET_UNIQUE, drm_setunique, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
60 DRM_IOCTL_DEF(DRM_IOCTL_BLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
61 DRM_IOCTL_DEF(DRM_IOCTL_UNBLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
62 DRM_IOCTL_DEF(DRM_IOCTL_AUTH_MAGIC, drm_authmagic, DRM_AUTH|DRM_MASTER),
64 DRM_IOCTL_DEF(DRM_IOCTL_ADD_MAP, drm_addmap_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
65 DRM_IOCTL_DEF(DRM_IOCTL_RM_MAP, drm_rmmap_ioctl, DRM_AUTH),
67 DRM_IOCTL_DEF(DRM_IOCTL_SET_SAREA_CTX, drm_setsareactx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
68 DRM_IOCTL_DEF(DRM_IOCTL_GET_SAREA_CTX, drm_getsareactx, DRM_AUTH),
70 DRM_IOCTL_DEF(DRM_IOCTL_SET_MASTER, drm_setmaster_ioctl, DRM_ROOT_ONLY),
71 DRM_IOCTL_DEF(DRM_IOCTL_DROP_MASTER, drm_dropmaster_ioctl, DRM_ROOT_ONLY),
73 DRM_IOCTL_DEF(DRM_IOCTL_ADD_CTX, drm_addctx, DRM_AUTH|DRM_ROOT_ONLY),
74 DRM_IOCTL_DEF(DRM_IOCTL_RM_CTX, drm_rmctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
75 DRM_IOCTL_DEF(DRM_IOCTL_MOD_CTX, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
76 DRM_IOCTL_DEF(DRM_IOCTL_GET_CTX, drm_getctx, DRM_AUTH),
77 DRM_IOCTL_DEF(DRM_IOCTL_SWITCH_CTX, drm_switchctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
78 DRM_IOCTL_DEF(DRM_IOCTL_NEW_CTX, drm_newctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
79 DRM_IOCTL_DEF(DRM_IOCTL_RES_CTX, drm_resctx, DRM_AUTH),
81 DRM_IOCTL_DEF(DRM_IOCTL_ADD_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
82 DRM_IOCTL_DEF(DRM_IOCTL_RM_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
84 DRM_IOCTL_DEF(DRM_IOCTL_LOCK, drm_lock, DRM_AUTH),
85 DRM_IOCTL_DEF(DRM_IOCTL_UNLOCK, drm_unlock, DRM_AUTH),
87 DRM_IOCTL_DEF(DRM_IOCTL_FINISH, drm_noop, DRM_AUTH),
89 DRM_IOCTL_DEF(DRM_IOCTL_ADD_BUFS, drm_addbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
90 DRM_IOCTL_DEF(DRM_IOCTL_MARK_BUFS, drm_markbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
91 DRM_IOCTL_DEF(DRM_IOCTL_INFO_BUFS, drm_infobufs, DRM_AUTH),
92 DRM_IOCTL_DEF(DRM_IOCTL_MAP_BUFS, drm_mapbufs, DRM_AUTH),
93 DRM_IOCTL_DEF(DRM_IOCTL_FREE_BUFS, drm_freebufs, DRM_AUTH),
94 DRM_IOCTL_DEF(DRM_IOCTL_DMA, drm_dma_ioctl, DRM_AUTH),
96 DRM_IOCTL_DEF(DRM_IOCTL_CONTROL, drm_control, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
99 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ACQUIRE, drm_agp_acquire_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
100 DRM_IOCTL_DEF(DRM_IOCTL_AGP_RELEASE, drm_agp_release_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
101 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ENABLE, drm_agp_enable_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
102 DRM_IOCTL_DEF(DRM_IOCTL_AGP_INFO, drm_agp_info_ioctl, DRM_AUTH),
103 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ALLOC, drm_agp_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
104 DRM_IOCTL_DEF(DRM_IOCTL_AGP_FREE, drm_agp_free_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
105 DRM_IOCTL_DEF(DRM_IOCTL_AGP_BIND, drm_agp_bind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
106 DRM_IOCTL_DEF(DRM_IOCTL_AGP_UNBIND, drm_agp_unbind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
109 DRM_IOCTL_DEF(DRM_IOCTL_SG_ALLOC, drm_sg_alloc, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
110 DRM_IOCTL_DEF(DRM_IOCTL_SG_FREE, drm_sg_free, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
112 DRM_IOCTL_DEF(DRM_IOCTL_WAIT_VBLANK, drm_wait_vblank, DRM_UNLOCKED),
114 DRM_IOCTL_DEF(DRM_IOCTL_MODESET_CTL, drm_modeset_ctl, 0),
116 DRM_IOCTL_DEF(DRM_IOCTL_UPDATE_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
118 DRM_IOCTL_DEF(DRM_IOCTL_GEM_CLOSE, drm_gem_close_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
119 DRM_IOCTL_DEF(DRM_IOCTL_GEM_FLINK, drm_gem_flink_ioctl, DRM_AUTH|DRM_UNLOCKED),
120 DRM_IOCTL_DEF(DRM_IOCTL_GEM_OPEN, drm_gem_open_ioctl, DRM_AUTH|DRM_UNLOCKED),
122 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETRESOURCES, drm_mode_getresources, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
124 DRM_IOCTL_DEF(DRM_IOCTL_PRIME_HANDLE_TO_FD, drm_prime_handle_to_fd_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
125 DRM_IOCTL_DEF(DRM_IOCTL_PRIME_FD_TO_HANDLE, drm_prime_fd_to_handle_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
127 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANERESOURCES, drm_mode_getplane_res, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
128 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCRTC, drm_mode_getcrtc, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
129 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETCRTC, drm_mode_setcrtc, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
130 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANE, drm_mode_getplane, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
131 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPLANE, drm_mode_setplane, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
132 DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR, drm_mode_cursor_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
133 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETGAMMA, drm_mode_gamma_get_ioctl, DRM_UNLOCKED),
134 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETGAMMA, drm_mode_gamma_set_ioctl, DRM_MASTER|DRM_UNLOCKED),
135 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETENCODER, drm_mode_getencoder, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
136 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCONNECTOR, drm_mode_getconnector, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
137 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATTACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
138 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DETACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
139 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPERTY, drm_mode_getproperty_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
140 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPROPERTY, drm_mode_connector_property_set_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
141 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPBLOB, drm_mode_getblob_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
142 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETFB, drm_mode_getfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
143 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB, drm_mode_addfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
144 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB2, drm_mode_addfb2, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
145 DRM_IOCTL_DEF(DRM_IOCTL_MODE_RMFB, drm_mode_rmfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
146 DRM_IOCTL_DEF(DRM_IOCTL_MODE_PAGE_FLIP, drm_mode_page_flip_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
147 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DIRTYFB, drm_mode_dirtyfb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
148 DRM_IOCTL_DEF(DRM_IOCTL_MODE_CREATE_DUMB, drm_mode_create_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
149 DRM_IOCTL_DEF(DRM_IOCTL_MODE_MAP_DUMB, drm_mode_mmap_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
150 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DESTROY_DUMB, drm_mode_destroy_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
151 DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_GETPROPERTIES, drm_mode_obj_get_properties_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
152 DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_SETPROPERTY, drm_mode_obj_set_property_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
153 DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR2, drm_mode_cursor2_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
156 #define DRM_CORE_IOCTL_COUNT ARRAY_SIZE( drm_ioctls )
161 * \param inode device inode.
162 * \param file_priv DRM file private.
163 * \param cmd command.
164 * \param arg user argument, pointing to a drm_unique structure.
165 * \return zero on success or a negative number on failure.
167 * Copies the bus id from drm_device::unique into user space.
169 int drm_getunique(struct drm_device *dev, void *data,
170 struct drm_file *file_priv)
172 struct drm_unique *u = data;
173 struct drm_master *master = file_priv->master;
175 if (u->unique_len >= master->unique_len) {
176 if (copy_to_user(u->unique, master->unique, master->unique_len))
179 u->unique_len = master->unique_len;
185 drm_unset_busid(struct drm_device *dev,
186 struct drm_master *master)
188 kfree(master->unique);
189 master->unique = NULL;
190 master->unique_len = 0;
191 master->unique_size = 0;
197 * \param inode device inode.
198 * \param file_priv DRM file private.
199 * \param cmd command.
200 * \param arg user argument, pointing to a drm_unique structure.
201 * \return zero on success or a negative number on failure.
203 * Copies the bus id from userspace into drm_device::unique, and verifies that
204 * it matches the device this DRM is attached to (EINVAL otherwise). Deprecated
205 * in interface version 1.1 and will return EBUSY when setversion has requested
206 * version 1.1 or greater. Also note that KMS is all version 1.1 and later and
207 * UMS was only ever supported on pci devices.
209 int drm_setunique(struct drm_device *dev, void *data,
210 struct drm_file *file_priv)
212 struct drm_unique *u = data;
213 struct drm_master *master = file_priv->master;
216 if (master->unique_len || master->unique)
219 if (!u->unique_len || u->unique_len > 1024)
222 if (drm_core_check_feature(dev, DRIVER_MODESET))
225 if (WARN_ON(!dev->pdev))
228 ret = drm_pci_set_unique(dev, master, u);
235 drm_unset_busid(dev, master);
239 static int drm_set_busid(struct drm_device *dev, struct drm_file *file_priv)
241 struct drm_master *master = file_priv->master;
244 if (master->unique != NULL)
245 drm_unset_busid(dev, master);
247 if (dev->driver->bus && dev->driver->bus->set_busid) {
248 ret = dev->driver->bus->set_busid(dev, master);
250 drm_unset_busid(dev, master);
254 if (WARN(dev->unique == NULL,
255 "No drm_bus.set_busid() implementation provided by "
256 "%ps. Use drm_dev_set_unique() to set the unique "
257 "name explicitly.", dev->driver))
260 master->unique = kstrdup(dev->unique, GFP_KERNEL);
262 master->unique_len = strlen(dev->unique);
269 * Get a mapping information.
271 * \param inode device inode.
272 * \param file_priv DRM file private.
273 * \param cmd command.
274 * \param arg user argument, pointing to a drm_map structure.
276 * \return zero on success or a negative number on failure.
278 * Searches for the mapping with the specified offset and copies its information
281 int drm_getmap(struct drm_device *dev, void *data,
282 struct drm_file *file_priv)
284 struct drm_map *map = data;
285 struct drm_map_list *r_list = NULL;
286 struct list_head *list;
295 mutex_lock(&dev->struct_mutex);
296 list_for_each(list, &dev->maplist) {
298 r_list = list_entry(list, struct drm_map_list, head);
303 if (!r_list || !r_list->map) {
304 mutex_unlock(&dev->struct_mutex);
308 map->offset = r_list->map->offset;
309 map->size = r_list->map->size;
310 map->type = r_list->map->type;
311 map->flags = r_list->map->flags;
312 map->handle = (void *)(unsigned long) r_list->user_token;
316 * There appears to be exactly one user of the mtrr index: dritest.
317 * It's easy enough to keep it working on non-PAT systems.
319 map->mtrr = phys_wc_to_mtrr_index(r_list->map->mtrr);
324 mutex_unlock(&dev->struct_mutex);
330 * Get client information.
332 * \param inode device inode.
333 * \param file_priv DRM file private.
334 * \param cmd command.
335 * \param arg user argument, pointing to a drm_client structure.
337 * \return zero on success or a negative number on failure.
339 * Searches for the client with the specified index and copies its information
342 int drm_getclient(struct drm_device *dev, void *data,
343 struct drm_file *file_priv)
345 struct drm_client *client = data;
348 * Hollowed-out getclient ioctl to keep some dead old drm tests/tools
349 * not breaking completely. Userspace tools stop enumerating one they
350 * get -EINVAL, hence this is the return value we need to hand back for
351 * no clients tracked.
353 * Unfortunately some clients (*cough* libva *cough*) use this in a fun
354 * attempt to figure out whether they're authenticated or not. Since
355 * that's the only thing they care about, give it to the directly
356 * instead of walking one giant list.
358 if (client->idx == 0) {
359 client->auth = file_priv->authenticated;
360 client->pid = pid_vnr(file_priv->pid);
361 client->uid = from_kuid_munged(current_user_ns(),
373 * Get statistics information.
375 * \param inode device inode.
376 * \param file_priv DRM file private.
377 * \param cmd command.
378 * \param arg user argument, pointing to a drm_stats structure.
380 * \return zero on success or a negative number on failure.
382 int drm_getstats(struct drm_device *dev, void *data,
383 struct drm_file *file_priv)
385 struct drm_stats *stats = data;
387 /* Clear stats to prevent userspace from eating its stack garbage. */
388 memset(stats, 0, sizeof(*stats));
394 * Get device/driver capabilities
396 int drm_getcap(struct drm_device *dev, void *data, struct drm_file *file_priv)
398 struct drm_get_cap *req = data;
401 switch (req->capability) {
402 case DRM_CAP_DUMB_BUFFER:
403 if (dev->driver->dumb_create)
406 case DRM_CAP_VBLANK_HIGH_CRTC:
409 case DRM_CAP_DUMB_PREFERRED_DEPTH:
410 req->value = dev->mode_config.preferred_depth;
412 case DRM_CAP_DUMB_PREFER_SHADOW:
413 req->value = dev->mode_config.prefer_shadow;
416 req->value |= dev->driver->prime_fd_to_handle ? DRM_PRIME_CAP_IMPORT : 0;
417 req->value |= dev->driver->prime_handle_to_fd ? DRM_PRIME_CAP_EXPORT : 0;
419 case DRM_CAP_TIMESTAMP_MONOTONIC:
420 req->value = drm_timestamp_monotonic;
422 case DRM_CAP_ASYNC_PAGE_FLIP:
423 req->value = dev->mode_config.async_page_flip;
425 case DRM_CAP_CURSOR_WIDTH:
426 if (dev->mode_config.cursor_width)
427 req->value = dev->mode_config.cursor_width;
431 case DRM_CAP_CURSOR_HEIGHT:
432 if (dev->mode_config.cursor_height)
433 req->value = dev->mode_config.cursor_height;
444 * Set device/driver capabilities
447 drm_setclientcap(struct drm_device *dev, void *data, struct drm_file *file_priv)
449 struct drm_set_client_cap *req = data;
451 switch (req->capability) {
452 case DRM_CLIENT_CAP_STEREO_3D:
455 file_priv->stereo_allowed = req->value;
457 case DRM_CLIENT_CAP_UNIVERSAL_PLANES:
460 file_priv->universal_planes = req->value;
472 * \param inode device inode.
473 * \param file_priv DRM file private.
474 * \param cmd command.
475 * \param arg user argument, pointing to a drm_lock structure.
476 * \return zero on success or negative number on failure.
478 * Sets the requested interface version
480 int drm_setversion(struct drm_device *dev, void *data, struct drm_file *file_priv)
482 struct drm_set_version *sv = data;
483 int if_version, retcode = 0;
485 if (sv->drm_di_major != -1) {
486 if (sv->drm_di_major != DRM_IF_MAJOR ||
487 sv->drm_di_minor < 0 || sv->drm_di_minor > DRM_IF_MINOR) {
491 if_version = DRM_IF_VERSION(sv->drm_di_major,
493 dev->if_version = max(if_version, dev->if_version);
494 if (sv->drm_di_minor >= 1) {
496 * Version 1.1 includes tying of DRM to specific device
497 * Version 1.4 has proper PCI domain support
499 retcode = drm_set_busid(dev, file_priv);
505 if (sv->drm_dd_major != -1) {
506 if (sv->drm_dd_major != dev->driver->major ||
507 sv->drm_dd_minor < 0 || sv->drm_dd_minor >
508 dev->driver->minor) {
515 sv->drm_di_major = DRM_IF_MAJOR;
516 sv->drm_di_minor = DRM_IF_MINOR;
517 sv->drm_dd_major = dev->driver->major;
518 sv->drm_dd_minor = dev->driver->minor;
524 int drm_noop(struct drm_device *dev, void *data,
525 struct drm_file *file_priv)
530 EXPORT_SYMBOL(drm_noop);
533 * Copy and IOCTL return string to user space
535 static int drm_copy_field(char __user *buf, size_t *buf_len, const char *value)
539 /* don't overflow userbuf */
544 /* let userspace know exact length of driver value (which could be
545 * larger than the userspace-supplied buffer) */
546 *buf_len = strlen(value);
548 /* finally, try filling in the userbuf */
550 if (copy_to_user(buf, value, len))
556 * Get version information
558 * \param inode device inode.
559 * \param filp file pointer.
560 * \param cmd command.
561 * \param arg user argument, pointing to a drm_version structure.
562 * \return zero on success or negative number on failure.
564 * Fills in the version information in \p arg.
566 static int drm_version(struct drm_device *dev, void *data,
567 struct drm_file *file_priv)
569 struct drm_version *version = data;
572 version->version_major = dev->driver->major;
573 version->version_minor = dev->driver->minor;
574 version->version_patchlevel = dev->driver->patchlevel;
575 err = drm_copy_field(version->name, &version->name_len,
578 err = drm_copy_field(version->date, &version->date_len,
581 err = drm_copy_field(version->desc, &version->desc_len,
588 * drm_ioctl_permit - Check ioctl permissions against caller
590 * @flags: ioctl permission flags.
591 * @file_priv: Pointer to struct drm_file identifying the caller.
593 * Checks whether the caller is allowed to run an ioctl with the
594 * indicated permissions. If so, returns zero. Otherwise returns an
595 * error code suitable for ioctl return.
597 static int drm_ioctl_permit(u32 flags, struct drm_file *file_priv)
599 /* ROOT_ONLY is only for CAP_SYS_ADMIN */
600 if (unlikely((flags & DRM_ROOT_ONLY) && !capable(CAP_SYS_ADMIN)))
603 /* AUTH is only for authenticated or render client */
604 if (unlikely((flags & DRM_AUTH) && !drm_is_render_client(file_priv) &&
605 !file_priv->authenticated))
608 /* MASTER is only for master or control clients */
609 if (unlikely((flags & DRM_MASTER) && !drm_is_master(file_priv) &&
610 !drm_is_control_client(file_priv)))
613 /* Control clients must be explicitly allowed */
614 if (unlikely(!(flags & DRM_CONTROL_ALLOW) &&
615 drm_is_control_client(file_priv)))
618 /* Render clients must be explicitly allowed */
619 if (unlikely(!(flags & DRM_RENDER_ALLOW) &&
620 drm_is_render_client(file_priv)))
627 * Called whenever a process performs an ioctl on /dev/drm.
629 * \param inode device inode.
630 * \param file_priv DRM file private.
631 * \param cmd command.
632 * \param arg user argument.
633 * \return zero on success or negative number on failure.
635 * Looks up the ioctl function in the ::ioctls table, checking for root
636 * previleges if so required, and dispatches to the respective function.
638 long drm_ioctl(struct file *filp,
639 unsigned int cmd, unsigned long arg)
641 struct drm_file *file_priv = filp->private_data;
642 struct drm_device *dev;
643 const struct drm_ioctl_desc *ioctl = NULL;
645 unsigned int nr = DRM_IOCTL_NR(cmd);
646 int retcode = -EINVAL;
647 char stack_kdata[128];
649 unsigned int usize, asize;
651 dev = file_priv->minor->dev;
653 if (drm_device_is_unplugged(dev))
656 if ((nr >= DRM_CORE_IOCTL_COUNT) &&
657 ((nr < DRM_COMMAND_BASE) || (nr >= DRM_COMMAND_END)))
659 if ((nr >= DRM_COMMAND_BASE) && (nr < DRM_COMMAND_END) &&
660 (nr < DRM_COMMAND_BASE + dev->driver->num_ioctls)) {
662 ioctl = &dev->driver->ioctls[nr - DRM_COMMAND_BASE];
663 drv_size = _IOC_SIZE(ioctl->cmd_drv);
664 usize = asize = _IOC_SIZE(cmd);
665 if (drv_size > asize)
667 cmd = ioctl->cmd_drv;
669 else if ((nr >= DRM_COMMAND_END) || (nr < DRM_COMMAND_BASE)) {
672 ioctl = &drm_ioctls[nr];
674 drv_size = _IOC_SIZE(ioctl->cmd);
675 usize = asize = _IOC_SIZE(cmd);
676 if (drv_size > asize)
683 DRM_DEBUG("pid=%d, dev=0x%lx, auth=%d, %s\n",
684 task_pid_nr(current),
685 (long)old_encode_dev(file_priv->minor->kdev->devt),
686 file_priv->authenticated, ioctl->name);
688 /* Do not trust userspace, use our own definition */
691 if (unlikely(!func)) {
692 DRM_DEBUG("no function\n");
697 retcode = drm_ioctl_permit(ioctl->flags, file_priv);
698 if (unlikely(retcode))
701 if (cmd & (IOC_IN | IOC_OUT)) {
702 if (asize <= sizeof(stack_kdata)) {
705 kdata = kmalloc(asize, GFP_KERNEL);
712 memset(kdata + usize, 0, asize - usize);
716 if (copy_from_user(kdata, (void __user *)arg,
721 } else if (cmd & IOC_OUT) {
722 memset(kdata, 0, usize);
725 if (ioctl->flags & DRM_UNLOCKED)
726 retcode = func(dev, kdata, file_priv);
728 mutex_lock(&drm_global_mutex);
729 retcode = func(dev, kdata, file_priv);
730 mutex_unlock(&drm_global_mutex);
734 if (copy_to_user((void __user *)arg, kdata,
741 DRM_DEBUG("invalid ioctl: pid=%d, dev=0x%lx, auth=%d, cmd=0x%02x, nr=0x%02x\n",
742 task_pid_nr(current),
743 (long)old_encode_dev(file_priv->minor->kdev->devt),
744 file_priv->authenticated, cmd, nr);
746 if (kdata != stack_kdata)
749 DRM_DEBUG("ret = %d\n", retcode);
752 EXPORT_SYMBOL(drm_ioctl);
755 * drm_ioctl_flags - Check for core ioctl and return ioctl permission flags
758 * @flags: Where to return the ioctl permission flags
760 bool drm_ioctl_flags(unsigned int nr, unsigned int *flags)
762 if ((nr >= DRM_COMMAND_END && nr < DRM_CORE_IOCTL_COUNT) ||
763 (nr < DRM_COMMAND_BASE)) {
764 *flags = drm_ioctls[nr].flags;
770 EXPORT_SYMBOL(drm_ioctl_flags);