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.
39 #include "linux/pci.h"
44 * \param inode device inode.
45 * \param file_priv DRM file private.
47 * \param arg user argument, pointing to a drm_unique structure.
48 * \return zero on success or a negative number on failure.
50 * Copies the bus id from drm_device::unique into user space.
52 int drm_getunique(struct drm_device *dev, void *data,
53 struct drm_file *file_priv)
55 struct drm_unique *u = data;
56 struct drm_master *master = file_priv->master;
58 if (u->unique_len >= master->unique_len) {
59 if (copy_to_user(u->unique, master->unique, master->unique_len))
62 u->unique_len = master->unique_len;
68 drm_unset_busid(struct drm_device *dev,
69 struct drm_master *master)
74 kfree(master->unique);
75 master->unique = NULL;
76 master->unique_len = 0;
77 master->unique_size = 0;
83 * \param inode device inode.
84 * \param file_priv DRM file private.
86 * \param arg user argument, pointing to a drm_unique structure.
87 * \return zero on success or a negative number on failure.
89 * Copies the bus id from userspace into drm_device::unique, and verifies that
90 * it matches the device this DRM is attached to (EINVAL otherwise). Deprecated
91 * in interface version 1.1 and will return EBUSY when setversion has requested
92 * version 1.1 or greater.
94 int drm_setunique(struct drm_device *dev, void *data,
95 struct drm_file *file_priv)
97 struct drm_unique *u = data;
98 struct drm_master *master = file_priv->master;
99 int domain, bus, slot, func, ret;
101 if (master->unique_len || master->unique)
104 if (!u->unique_len || u->unique_len > 1024)
107 master->unique_len = u->unique_len;
108 master->unique_size = u->unique_len + 1;
109 master->unique = kmalloc(master->unique_size, GFP_KERNEL);
110 if (!master->unique) {
115 if (copy_from_user(master->unique, u->unique, master->unique_len)) {
120 master->unique[master->unique_len] = '\0';
122 dev->devname = kmalloc(strlen(dev->driver->pci_driver.name) +
123 strlen(master->unique) + 2, GFP_KERNEL);
129 sprintf(dev->devname, "%s@%s", dev->driver->pci_driver.name,
132 /* Return error if the busid submitted doesn't match the device's actual
135 ret = sscanf(master->unique, "PCI:%d:%d:%d", &bus, &slot, &func);
144 if ((domain != drm_get_pci_domain(dev)) ||
145 (bus != dev->pdev->bus->number) ||
146 (slot != PCI_SLOT(dev->pdev->devfn)) ||
147 (func != PCI_FUNC(dev->pdev->devfn))) {
155 drm_unset_busid(dev, master);
159 static int drm_set_busid(struct drm_device *dev, struct drm_file *file_priv)
161 struct drm_master *master = file_priv->master;
164 if (master->unique != NULL)
165 drm_unset_busid(dev, master);
167 if (drm_core_check_feature(dev, DRIVER_USE_PLATFORM_DEVICE)) {
168 master->unique_len = 10 + strlen(dev->platformdev->name);
169 master->unique = kmalloc(master->unique_len + 1, GFP_KERNEL);
171 if (master->unique == NULL)
174 len = snprintf(master->unique, master->unique_len,
175 "platform:%s", dev->platformdev->name);
177 if (len > master->unique_len) {
178 DRM_ERROR("Unique buffer overflowed\n");
184 kmalloc(strlen(dev->platformdev->name) +
185 master->unique_len + 2, GFP_KERNEL);
187 if (dev->devname == NULL) {
192 sprintf(dev->devname, "%s@%s", dev->platformdev->name,
196 master->unique_len = 40;
197 master->unique_size = master->unique_len;
198 master->unique = kmalloc(master->unique_size, GFP_KERNEL);
199 if (master->unique == NULL)
202 len = snprintf(master->unique, master->unique_len,
203 "pci:%04x:%02x:%02x.%d",
204 drm_get_pci_domain(dev),
205 dev->pdev->bus->number,
206 PCI_SLOT(dev->pdev->devfn),
207 PCI_FUNC(dev->pdev->devfn));
208 if (len >= master->unique_len) {
209 DRM_ERROR("buffer overflow");
213 master->unique_len = len;
216 kmalloc(strlen(dev->driver->pci_driver.name) +
217 master->unique_len + 2, GFP_KERNEL);
219 if (dev->devname == NULL) {
224 sprintf(dev->devname, "%s@%s", dev->driver->pci_driver.name,
231 drm_unset_busid(dev, master);
236 * Get a mapping information.
238 * \param inode device inode.
239 * \param file_priv DRM file private.
240 * \param cmd command.
241 * \param arg user argument, pointing to a drm_map structure.
243 * \return zero on success or a negative number on failure.
245 * Searches for the mapping with the specified offset and copies its information
248 int drm_getmap(struct drm_device *dev, void *data,
249 struct drm_file *file_priv)
251 struct drm_map *map = data;
252 struct drm_map_list *r_list = NULL;
253 struct list_head *list;
259 mutex_lock(&dev->struct_mutex);
261 mutex_unlock(&dev->struct_mutex);
266 list_for_each(list, &dev->maplist) {
268 r_list = list_entry(list, struct drm_map_list, head);
273 if (!r_list || !r_list->map) {
274 mutex_unlock(&dev->struct_mutex);
278 map->offset = r_list->map->offset;
279 map->size = r_list->map->size;
280 map->type = r_list->map->type;
281 map->flags = r_list->map->flags;
282 map->handle = (void *)(unsigned long) r_list->user_token;
283 map->mtrr = r_list->map->mtrr;
284 mutex_unlock(&dev->struct_mutex);
290 * Get client information.
292 * \param inode device inode.
293 * \param file_priv DRM file private.
294 * \param cmd command.
295 * \param arg user argument, pointing to a drm_client structure.
297 * \return zero on success or a negative number on failure.
299 * Searches for the client with the specified index and copies its information
302 int drm_getclient(struct drm_device *dev, void *data,
303 struct drm_file *file_priv)
305 struct drm_client *client = data;
311 mutex_lock(&dev->struct_mutex);
314 list_for_each_entry(pt, &dev->filelist, lhead) {
316 client->auth = pt->authenticated;
317 client->pid = pt->pid;
318 client->uid = pt->uid;
319 client->magic = pt->magic;
320 client->iocs = pt->ioctl_count;
321 mutex_unlock(&dev->struct_mutex);
326 mutex_unlock(&dev->struct_mutex);
332 * Get statistics information.
334 * \param inode device inode.
335 * \param file_priv DRM file private.
336 * \param cmd command.
337 * \param arg user argument, pointing to a drm_stats structure.
339 * \return zero on success or a negative number on failure.
341 int drm_getstats(struct drm_device *dev, void *data,
342 struct drm_file *file_priv)
344 struct drm_stats *stats = data;
347 memset(stats, 0, sizeof(*stats));
349 mutex_lock(&dev->struct_mutex);
351 for (i = 0; i < dev->counters; i++) {
352 if (dev->types[i] == _DRM_STAT_LOCK)
353 stats->data[i].value =
354 (file_priv->master->lock.hw_lock ? file_priv->master->lock.hw_lock->lock : 0);
356 stats->data[i].value = atomic_read(&dev->counts[i]);
357 stats->data[i].type = dev->types[i];
360 stats->count = dev->counters;
362 mutex_unlock(&dev->struct_mutex);
370 * \param inode device inode.
371 * \param file_priv DRM file private.
372 * \param cmd command.
373 * \param arg user argument, pointing to a drm_lock structure.
374 * \return zero on success or negative number on failure.
376 * Sets the requested interface version
378 int drm_setversion(struct drm_device *dev, void *data, struct drm_file *file_priv)
380 struct drm_set_version *sv = data;
381 int if_version, retcode = 0;
383 if (sv->drm_di_major != -1) {
384 if (sv->drm_di_major != DRM_IF_MAJOR ||
385 sv->drm_di_minor < 0 || sv->drm_di_minor > DRM_IF_MINOR) {
389 if_version = DRM_IF_VERSION(sv->drm_di_major,
391 dev->if_version = max(if_version, dev->if_version);
392 if (sv->drm_di_minor >= 1) {
394 * Version 1.1 includes tying of DRM to specific device
395 * Version 1.4 has proper PCI domain support
397 retcode = drm_set_busid(dev, file_priv);
403 if (sv->drm_dd_major != -1) {
404 if (sv->drm_dd_major != dev->driver->major ||
405 sv->drm_dd_minor < 0 || sv->drm_dd_minor >
406 dev->driver->minor) {
411 if (dev->driver->set_version)
412 dev->driver->set_version(dev, sv);
416 sv->drm_di_major = DRM_IF_MAJOR;
417 sv->drm_di_minor = DRM_IF_MINOR;
418 sv->drm_dd_major = dev->driver->major;
419 sv->drm_dd_minor = dev->driver->minor;
425 int drm_noop(struct drm_device *dev, void *data,
426 struct drm_file *file_priv)