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
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37 #include <drm/drm_core.h>
39 #include <linux/pci.h>
40 #include <linux/export.h>
48 * \param inode device inode.
49 * \param file_priv DRM file private.
51 * \param arg user argument, pointing to a drm_unique structure.
52 * \return zero on success or a negative number on failure.
54 * Copies the bus id from drm_device::unique into user space.
56 int drm_getunique(struct drm_device *dev, void *data,
57 struct drm_file *file_priv)
59 struct drm_unique *u = data;
60 struct drm_master *master = file_priv->master;
62 if (u->unique_len >= master->unique_len) {
63 if (copy_to_user(u->unique, master->unique, master->unique_len))
66 u->unique_len = master->unique_len;
72 drm_unset_busid(struct drm_device *dev,
73 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. Also note that KMS is all version 1.1 and later and
94 * UMS was only ever supported on pci devices.
96 int drm_setunique(struct drm_device *dev, void *data,
97 struct drm_file *file_priv)
99 struct drm_unique *u = data;
100 struct drm_master *master = file_priv->master;
103 if (master->unique_len || master->unique)
106 if (!u->unique_len || u->unique_len > 1024)
109 if (drm_core_check_feature(dev, DRIVER_MODESET))
112 if (WARN_ON(!dev->pdev))
115 ret = drm_pci_set_unique(dev, master, u);
122 drm_unset_busid(dev, master);
126 static int drm_set_busid(struct drm_device *dev, struct drm_file *file_priv)
128 struct drm_master *master = file_priv->master;
131 if (master->unique != NULL)
132 drm_unset_busid(dev, master);
134 ret = dev->driver->bus->set_busid(dev, master);
139 drm_unset_busid(dev, master);
144 * Get a mapping information.
146 * \param inode device inode.
147 * \param file_priv DRM file private.
148 * \param cmd command.
149 * \param arg user argument, pointing to a drm_map structure.
151 * \return zero on success or a negative number on failure.
153 * Searches for the mapping with the specified offset and copies its information
156 int drm_getmap(struct drm_device *dev, void *data,
157 struct drm_file *file_priv)
159 struct drm_map *map = data;
160 struct drm_map_list *r_list = NULL;
161 struct list_head *list;
170 mutex_lock(&dev->struct_mutex);
171 list_for_each(list, &dev->maplist) {
173 r_list = list_entry(list, struct drm_map_list, head);
178 if (!r_list || !r_list->map) {
179 mutex_unlock(&dev->struct_mutex);
183 map->offset = r_list->map->offset;
184 map->size = r_list->map->size;
185 map->type = r_list->map->type;
186 map->flags = r_list->map->flags;
187 map->handle = (void *)(unsigned long) r_list->user_token;
191 * There appears to be exactly one user of the mtrr index: dritest.
192 * It's easy enough to keep it working on non-PAT systems.
194 map->mtrr = phys_wc_to_mtrr_index(r_list->map->mtrr);
199 mutex_unlock(&dev->struct_mutex);
205 * Get client information.
207 * \param inode device inode.
208 * \param file_priv DRM file private.
209 * \param cmd command.
210 * \param arg user argument, pointing to a drm_client structure.
212 * \return zero on success or a negative number on failure.
214 * Searches for the client with the specified index and copies its information
217 int drm_getclient(struct drm_device *dev, void *data,
218 struct drm_file *file_priv)
220 struct drm_client *client = data;
223 * Hollowed-out getclient ioctl to keep some dead old drm tests/tools
224 * not breaking completely. Userspace tools stop enumerating one they
225 * get -EINVAL, hence this is the return value we need to hand back for
226 * no clients tracked.
228 * Unfortunately some clients (*cough* libva *cough*) use this in a fun
229 * attempt to figure out whether they're authenticated or not. Since
230 * that's the only thing they care about, give it to the directly
231 * instead of walking one giant list.
233 if (client->idx == 0) {
234 client->auth = file_priv->authenticated;
235 client->pid = pid_vnr(file_priv->pid);
236 client->uid = from_kuid_munged(current_user_ns(),
248 * Get statistics information.
250 * \param inode device inode.
251 * \param file_priv DRM file private.
252 * \param cmd command.
253 * \param arg user argument, pointing to a drm_stats structure.
255 * \return zero on success or a negative number on failure.
257 int drm_getstats(struct drm_device *dev, void *data,
258 struct drm_file *file_priv)
260 struct drm_stats *stats = data;
262 /* Clear stats to prevent userspace from eating its stack garbage. */
263 memset(stats, 0, sizeof(*stats));
269 * Get device/driver capabilities
271 int drm_getcap(struct drm_device *dev, void *data, struct drm_file *file_priv)
273 struct drm_get_cap *req = data;
276 switch (req->capability) {
277 case DRM_CAP_DUMB_BUFFER:
278 if (dev->driver->dumb_create)
281 case DRM_CAP_VBLANK_HIGH_CRTC:
284 case DRM_CAP_DUMB_PREFERRED_DEPTH:
285 req->value = dev->mode_config.preferred_depth;
287 case DRM_CAP_DUMB_PREFER_SHADOW:
288 req->value = dev->mode_config.prefer_shadow;
291 req->value |= dev->driver->prime_fd_to_handle ? DRM_PRIME_CAP_IMPORT : 0;
292 req->value |= dev->driver->prime_handle_to_fd ? DRM_PRIME_CAP_EXPORT : 0;
294 case DRM_CAP_TIMESTAMP_MONOTONIC:
295 req->value = drm_timestamp_monotonic;
297 case DRM_CAP_ASYNC_PAGE_FLIP:
298 req->value = dev->mode_config.async_page_flip;
300 case DRM_CAP_CURSOR_WIDTH:
301 if (dev->mode_config.cursor_width)
302 req->value = dev->mode_config.cursor_width;
306 case DRM_CAP_CURSOR_HEIGHT:
307 if (dev->mode_config.cursor_height)
308 req->value = dev->mode_config.cursor_height;
319 * Set device/driver capabilities
322 drm_setclientcap(struct drm_device *dev, void *data, struct drm_file *file_priv)
324 struct drm_set_client_cap *req = data;
326 switch (req->capability) {
327 case DRM_CLIENT_CAP_STEREO_3D:
330 file_priv->stereo_allowed = req->value;
332 case DRM_CLIENT_CAP_UNIVERSAL_PLANES:
333 if (!drm_universal_planes)
337 file_priv->universal_planes = req->value;
349 * \param inode device inode.
350 * \param file_priv DRM file private.
351 * \param cmd command.
352 * \param arg user argument, pointing to a drm_lock structure.
353 * \return zero on success or negative number on failure.
355 * Sets the requested interface version
357 int drm_setversion(struct drm_device *dev, void *data, struct drm_file *file_priv)
359 struct drm_set_version *sv = data;
360 int if_version, retcode = 0;
362 if (sv->drm_di_major != -1) {
363 if (sv->drm_di_major != DRM_IF_MAJOR ||
364 sv->drm_di_minor < 0 || sv->drm_di_minor > DRM_IF_MINOR) {
368 if_version = DRM_IF_VERSION(sv->drm_di_major,
370 dev->if_version = max(if_version, dev->if_version);
371 if (sv->drm_di_minor >= 1) {
373 * Version 1.1 includes tying of DRM to specific device
374 * Version 1.4 has proper PCI domain support
376 retcode = drm_set_busid(dev, file_priv);
382 if (sv->drm_dd_major != -1) {
383 if (sv->drm_dd_major != dev->driver->major ||
384 sv->drm_dd_minor < 0 || sv->drm_dd_minor >
385 dev->driver->minor) {
392 sv->drm_di_major = DRM_IF_MAJOR;
393 sv->drm_di_minor = DRM_IF_MINOR;
394 sv->drm_dd_major = dev->driver->major;
395 sv->drm_dd_minor = dev->driver->minor;
401 int drm_noop(struct drm_device *dev, void *data,
402 struct drm_file *file_priv)
407 EXPORT_SYMBOL(drm_noop);