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.
35 * $FreeBSD: src/sys/dev/drm2/drm_ioctl.c,v 1.1 2012/05/22 11:07:44 kib Exp $
39 #include <drm/drm_core.h>
41 #include <linux/export.h>
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 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 (DRM_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 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 (DRM_COPY_FROM_USER(busid, u->unique, u->unique_len)) {
98 drm_free(busid, M_DRM);
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);
108 drm_free(busid, M_DRM);
114 if ((domain != dev->pci_domain) ||
115 (bus != dev->pci_bus) ||
116 (slot != dev->pci_slot) ||
117 (func != dev->pci_func)) {
118 drm_free(busid, M_DRM);
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 a mapping 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_map structure.
164 * \return zero on success or a negative number on failure.
166 * Searches for the mapping with the specified offset and copies its information
169 int drm_getmap(struct drm_device *dev, void *data,
170 struct drm_file *file_priv)
172 struct drm_map *map = data;
173 struct drm_map_list *r_list = NULL;
174 struct list_head *list;
185 list_for_each(list, &dev->maplist) {
187 r_list = list_entry(list, struct drm_map_list, head);
192 if (!r_list || !r_list->map) {
197 map->offset = r_list->map->offset;
198 map->size = r_list->map->size;
199 map->type = r_list->map->type;
200 map->flags = r_list->map->flags;
201 map->handle = r_list->map->handle;
202 map->mtrr = r_list->map->mtrr;
209 * Get client information.
211 * \param inode device inode.
212 * \param file_priv DRM file private.
213 * \param cmd command.
214 * \param arg user argument, pointing to a drm_client structure.
216 * \return zero on success or a negative number on failure.
218 * Searches for the client with the specified index and copies its information
221 int drm_getclient(struct drm_device *dev, void *data,
222 struct drm_file *file_priv)
224 struct drm_client *client = data;
231 list_for_each_entry(pt, &dev->filelist, lhead) {
233 client->auth = pt->authenticated;
234 client->pid = pt->pid;
235 client->uid = pt->uid;
236 client->magic = pt->magic;
237 client->iocs = pt->ioctl_count;
249 * Get statistics information.
251 * \param inode device inode.
252 * \param file_priv DRM file private.
253 * \param cmd command.
254 * \param arg user argument, pointing to a drm_stats structure.
256 * \return zero on success or a negative number on failure.
258 int drm_getstats(struct drm_device *dev, void *data, struct drm_file *file_priv)
260 struct drm_stats *stats = data;
263 memset(stats, 0, sizeof(struct drm_stats));
267 for (i = 0; i < dev->counters; i++) {
268 if (dev->types[i] == _DRM_STAT_LOCK)
269 stats->data[i].value =
270 (dev->lock.hw_lock ? dev->lock.hw_lock->lock : 0);
272 stats->data[i].value = atomic_read(&dev->counts[i]);
273 stats->data[i].type = dev->types[i];
276 stats->count = dev->counters;
284 * Get device/driver capabilities
286 int drm_getcap(struct drm_device *dev, void *data, struct drm_file *file_priv)
288 struct drm_get_cap *req = data;
291 switch (req->capability) {
292 case DRM_CAP_DUMB_BUFFER:
293 if (dev->driver->dumb_create)
296 case DRM_CAP_VBLANK_HIGH_CRTC:
299 case DRM_CAP_DUMB_PREFERRED_DEPTH:
300 req->value = dev->mode_config.preferred_depth;
302 case DRM_CAP_DUMB_PREFER_SHADOW:
303 req->value = dev->mode_config.prefer_shadow;
305 case DRM_CAP_TIMESTAMP_MONOTONIC:
306 req->value = drm_timestamp_monotonic;
315 * Set device/driver capabilities
318 drm_setclientcap(struct drm_device *dev, void *data, struct drm_file *file_priv)
320 struct drm_set_client_cap *req = data;
322 switch (req->capability) {
323 case DRM_CLIENT_CAP_STEREO_3D:
326 file_priv->stereo_allowed = req->value;
338 * \param inode device inode.
339 * \param file_priv DRM file private.
340 * \param cmd command.
341 * \param arg user argument, pointing to a drm_lock structure.
342 * \return zero on success or negative number on failure.
344 * Sets the requested interface version
346 int drm_setversion(struct drm_device *dev, void *data, struct drm_file *file_priv)
348 struct drm_set_version *sv = data;
349 struct drm_set_version ver;
350 int if_version, retcode = 0;
352 /* Save the incoming data, and set the response before continuing
356 sv->drm_di_major = DRM_IF_MAJOR;
357 sv->drm_di_minor = DRM_IF_MINOR;
358 sv->drm_dd_major = dev->driver->major;
359 sv->drm_dd_minor = dev->driver->minor;
361 if (ver.drm_di_major != -1) {
362 if (ver.drm_di_major != DRM_IF_MAJOR ||
363 ver.drm_di_minor < 0 || ver.drm_di_minor > DRM_IF_MINOR) {
366 if_version = DRM_IF_VERSION(ver.drm_di_major,
368 dev->if_version = DRM_MAX(if_version, dev->if_version);
369 if (ver.drm_di_minor >= 1) {
371 * Version 1.1 includes tying of DRM to specific device
372 * Version 1.4 has proper PCI domain support
374 retcode = drm_set_busid(dev, file_priv);
380 if (ver.drm_dd_major != -1) {
381 if (ver.drm_dd_major != dev->driver->major ||
382 ver.drm_dd_minor < 0 ||
383 ver.drm_dd_minor > dev->driver->minor)
393 int drm_noop(struct drm_device *dev, void *data,
394 struct drm_file *file_priv)
399 EXPORT_SYMBOL(drm_noop);