3 * IOCTL processing for DRM
5 * \author Rickard E. (Rik) Faith <faith@valinux.com>
6 * \author Gareth Hughes <gareth@valinux.com>
10 * Created: Fri Jan 8 09:01:26 1999 by faith@valinux.com
12 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
13 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
14 * All Rights Reserved.
16 * Permission is hereby granted, free of charge, to any person obtaining a
17 * copy of this software and associated documentation files (the "Software"),
18 * to deal in the Software without restriction, including without limitation
19 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
20 * and/or sell copies of the Software, and to permit persons to whom the
21 * Software is furnished to do so, subject to the following conditions:
23 * The above copyright notice and this permission notice (including the next
24 * paragraph) shall be included in all copies or substantial portions of the
27 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
28 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
29 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
30 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
31 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
32 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
33 * OTHER DEALINGS IN THE SOFTWARE.
37 #include <drm/drm_core.h>
39 #include <linux/pci.h>
40 #include <linux/export.h>
45 * \param inode device inode.
46 * \param file_priv DRM file private.
48 * \param arg user argument, pointing to a drm_unique structure.
49 * \return zero on success or a negative number on failure.
51 * Copies the bus id from drm_device::unique into user space.
53 int drm_getunique(struct drm_device *dev, void *data,
54 struct drm_file *file_priv)
56 struct drm_unique *u = data;
57 struct drm_master *master = file_priv->master;
59 if (u->unique_len >= master->unique_len) {
60 if (copy_to_user(u->unique, master->unique, master->unique_len))
63 u->unique_len = master->unique_len;
69 drm_unset_busid(struct drm_device *dev,
70 struct drm_master *master)
75 kfree(master->unique);
76 master->unique = NULL;
77 master->unique_len = 0;
78 master->unique_size = 0;
84 * \param inode device inode.
85 * \param file_priv DRM file private.
87 * \param arg user argument, pointing to a drm_unique structure.
88 * \return zero on success or a negative number on failure.
90 * Copies the bus id from userspace into drm_device::unique, and verifies that
91 * it matches the device this DRM is attached to (EINVAL otherwise). Deprecated
92 * in interface version 1.1 and will return EBUSY when setversion has requested
93 * version 1.1 or greater.
95 int drm_setunique(struct drm_device *dev, void *data,
96 struct drm_file *file_priv)
98 struct drm_unique *u = data;
99 struct drm_master *master = file_priv->master;
102 if (master->unique_len || master->unique)
105 if (!u->unique_len || u->unique_len > 1024)
108 if (!dev->driver->bus->set_unique)
111 ret = dev->driver->bus->set_unique(dev, master, u);
118 drm_unset_busid(dev, master);
122 static int drm_set_busid(struct drm_device *dev, struct drm_file *file_priv)
124 struct drm_master *master = file_priv->master;
127 if (master->unique != NULL)
128 drm_unset_busid(dev, master);
130 ret = dev->driver->bus->set_busid(dev, master);
135 drm_unset_busid(dev, master);
140 * Get a mapping information.
142 * \param inode device inode.
143 * \param file_priv DRM file private.
144 * \param cmd command.
145 * \param arg user argument, pointing to a drm_map structure.
147 * \return zero on success or a negative number on failure.
149 * Searches for the mapping with the specified offset and copies its information
152 int drm_getmap(struct drm_device *dev, void *data,
153 struct drm_file *file_priv)
155 struct drm_map *map = data;
156 struct drm_map_list *r_list = NULL;
157 struct list_head *list;
166 mutex_lock(&dev->struct_mutex);
167 list_for_each(list, &dev->maplist) {
169 r_list = list_entry(list, struct drm_map_list, head);
174 if (!r_list || !r_list->map) {
175 mutex_unlock(&dev->struct_mutex);
179 map->offset = r_list->map->offset;
180 map->size = r_list->map->size;
181 map->type = r_list->map->type;
182 map->flags = r_list->map->flags;
183 map->handle = (void *)(unsigned long) r_list->user_token;
184 map->mtrr = r_list->map->mtrr;
185 mutex_unlock(&dev->struct_mutex);
191 * Get client information.
193 * \param inode device inode.
194 * \param file_priv DRM file private.
195 * \param cmd command.
196 * \param arg user argument, pointing to a drm_client structure.
198 * \return zero on success or a negative number on failure.
200 * Searches for the client with the specified index and copies its information
203 int drm_getclient(struct drm_device *dev, void *data,
204 struct drm_file *file_priv)
206 struct drm_client *client = data;
214 mutex_lock(&dev->struct_mutex);
215 list_for_each_entry(pt, &dev->filelist, lhead) {
217 client->auth = pt->authenticated;
218 client->pid = pid_vnr(pt->pid);
219 client->uid = from_kuid_munged(current_user_ns(), pt->uid);
220 client->magic = pt->magic;
221 client->iocs = pt->ioctl_count;
222 mutex_unlock(&dev->struct_mutex);
227 mutex_unlock(&dev->struct_mutex);
233 * Get statistics information.
235 * \param inode device inode.
236 * \param file_priv DRM file private.
237 * \param cmd command.
238 * \param arg user argument, pointing to a drm_stats structure.
240 * \return zero on success or a negative number on failure.
242 int drm_getstats(struct drm_device *dev, void *data,
243 struct drm_file *file_priv)
245 struct drm_stats *stats = data;
248 memset(stats, 0, sizeof(*stats));
250 for (i = 0; i < dev->counters; i++) {
251 if (dev->types[i] == _DRM_STAT_LOCK)
252 stats->data[i].value =
253 (file_priv->master->lock.hw_lock ? file_priv->master->lock.hw_lock->lock : 0);
255 stats->data[i].value = atomic_read(&dev->counts[i]);
256 stats->data[i].type = dev->types[i];
259 stats->count = dev->counters;
265 * Get device/driver capabilities
267 int drm_getcap(struct drm_device *dev, void *data, struct drm_file *file_priv)
269 struct drm_get_cap *req = data;
272 switch (req->capability) {
273 case DRM_CAP_DUMB_BUFFER:
274 if (dev->driver->dumb_create)
277 case DRM_CAP_VBLANK_HIGH_CRTC:
280 case DRM_CAP_DUMB_PREFERRED_DEPTH:
281 req->value = dev->mode_config.preferred_depth;
283 case DRM_CAP_DUMB_PREFER_SHADOW:
284 req->value = dev->mode_config.prefer_shadow;
287 req->value |= dev->driver->prime_fd_to_handle ? DRM_PRIME_CAP_IMPORT : 0;
288 req->value |= dev->driver->prime_handle_to_fd ? DRM_PRIME_CAP_EXPORT : 0;
299 * \param inode device inode.
300 * \param file_priv DRM file private.
301 * \param cmd command.
302 * \param arg user argument, pointing to a drm_lock structure.
303 * \return zero on success or negative number on failure.
305 * Sets the requested interface version
307 int drm_setversion(struct drm_device *dev, void *data, struct drm_file *file_priv)
309 struct drm_set_version *sv = data;
310 int if_version, retcode = 0;
312 if (sv->drm_di_major != -1) {
313 if (sv->drm_di_major != DRM_IF_MAJOR ||
314 sv->drm_di_minor < 0 || sv->drm_di_minor > DRM_IF_MINOR) {
318 if_version = DRM_IF_VERSION(sv->drm_di_major,
320 dev->if_version = max(if_version, dev->if_version);
321 if (sv->drm_di_minor >= 1) {
323 * Version 1.1 includes tying of DRM to specific device
324 * Version 1.4 has proper PCI domain support
326 retcode = drm_set_busid(dev, file_priv);
332 if (sv->drm_dd_major != -1) {
333 if (sv->drm_dd_major != dev->driver->major ||
334 sv->drm_dd_minor < 0 || sv->drm_dd_minor >
335 dev->driver->minor) {
340 if (dev->driver->set_version)
341 dev->driver->set_version(dev, sv);
345 sv->drm_di_major = DRM_IF_MAJOR;
346 sv->drm_di_minor = DRM_IF_MINOR;
347 sv->drm_dd_major = dev->driver->major;
348 sv->drm_dd_minor = dev->driver->minor;
354 int drm_noop(struct drm_device *dev, void *data,
355 struct drm_file *file_priv)
360 EXPORT_SYMBOL(drm_noop);