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
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39 #include "linux/pci.h"
44 * \param inode device inode.
45 * \param filp file pointer.
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 inode *inode, struct file *filp,
53 unsigned int cmd, unsigned long arg)
55 drm_file_t *priv = filp->private_data;
56 drm_device_t *dev = priv->head->dev;
57 drm_unique_t __user *argp = (void __user *)arg;
60 if (copy_from_user(&u, argp, sizeof(u)))
62 if (u.unique_len >= dev->unique_len) {
63 if (copy_to_user(u.unique, dev->unique, dev->unique_len))
66 u.unique_len = dev->unique_len;
67 if (copy_to_user(argp, &u, sizeof(u)))
75 * \param inode device inode.
76 * \param filp file pointer.
78 * \param arg user argument, pointing to a drm_unique structure.
79 * \return zero on success or a negative number on failure.
81 * Copies the bus id from userspace into drm_device::unique, and verifies that
82 * it matches the device this DRM is attached to (EINVAL otherwise). Deprecated
83 * in interface version 1.1 and will return EBUSY when setversion has requested
84 * version 1.1 or greater.
86 int drm_setunique(struct inode *inode, struct file *filp,
87 unsigned int cmd, unsigned long arg)
89 drm_file_t *priv = filp->private_data;
90 drm_device_t *dev = priv->head->dev;
92 int domain, bus, slot, func, ret;
94 if (dev->unique_len || dev->unique)
97 if (copy_from_user(&u, (drm_unique_t __user *) arg, sizeof(u)))
100 if (!u.unique_len || u.unique_len > 1024)
103 dev->unique_len = u.unique_len;
104 dev->unique = drm_alloc(u.unique_len + 1, DRM_MEM_DRIVER);
107 if (copy_from_user(dev->unique, u.unique, dev->unique_len))
110 dev->unique[dev->unique_len] = '\0';
113 drm_alloc(strlen(dev->driver->pci_driver.name) +
114 strlen(dev->unique) + 2, DRM_MEM_DRIVER);
118 sprintf(dev->devname, "%s@%s", dev->driver->pci_driver.name,
121 /* Return error if the busid submitted doesn't match the device's actual
124 ret = sscanf(dev->unique, "PCI:%d:%d:%d", &bus, &slot, &func);
126 return DRM_ERR(EINVAL);
130 if ((domain != dev->pci_domain) ||
131 (bus != dev->pci_bus) ||
132 (slot != dev->pci_slot) || (func != dev->pci_func))
138 static int drm_set_busid(drm_device_t * dev)
142 if (dev->unique != NULL)
145 dev->unique_len = 40;
146 dev->unique = drm_alloc(dev->unique_len + 1, DRM_MEM_DRIVER);
147 if (dev->unique == NULL)
150 len = snprintf(dev->unique, dev->unique_len, "pci:%04x:%02x:%02x.%d",
151 dev->pci_domain, dev->pci_bus, dev->pci_slot, dev->pci_func);
153 if (len > dev->unique_len)
154 DRM_ERROR("Unique buffer overflowed\n");
157 drm_alloc(strlen(dev->driver->pci_driver.name) + dev->unique_len +
159 if (dev->devname == NULL)
162 sprintf(dev->devname, "%s@%s", dev->driver->pci_driver.name,
169 * Get a mapping information.
171 * \param inode device inode.
172 * \param filp file pointer.
173 * \param cmd command.
174 * \param arg user argument, pointing to a drm_map structure.
176 * \return zero on success or a negative number on failure.
178 * Searches for the mapping with the specified offset and copies its information
181 int drm_getmap(struct inode *inode, struct file *filp,
182 unsigned int cmd, unsigned long arg)
184 drm_file_t *priv = filp->private_data;
185 drm_device_t *dev = priv->head->dev;
186 drm_map_t __user *argp = (void __user *)arg;
188 drm_map_list_t *r_list = NULL;
189 struct list_head *list;
193 if (copy_from_user(&map, argp, sizeof(map)))
197 mutex_lock(&dev->struct_mutex);
199 mutex_unlock(&dev->struct_mutex);
204 list_for_each(list, &dev->maplist->head) {
206 r_list = list_entry(list, drm_map_list_t, head);
211 if (!r_list || !r_list->map) {
212 mutex_unlock(&dev->struct_mutex);
216 map.offset = r_list->map->offset;
217 map.size = r_list->map->size;
218 map.type = r_list->map->type;
219 map.flags = r_list->map->flags;
220 map.handle = (void *)(unsigned long)r_list->user_token;
221 map.mtrr = r_list->map->mtrr;
222 mutex_unlock(&dev->struct_mutex);
224 if (copy_to_user(argp, &map, sizeof(map)))
230 * Get client information.
232 * \param inode device inode.
233 * \param filp file pointer.
234 * \param cmd command.
235 * \param arg user argument, pointing to a drm_client structure.
237 * \return zero on success or a negative number on failure.
239 * Searches for the client with the specified index and copies its information
242 int drm_getclient(struct inode *inode, struct file *filp,
243 unsigned int cmd, unsigned long arg)
245 drm_file_t *priv = filp->private_data;
246 drm_device_t *dev = priv->head->dev;
247 drm_client_t __user *argp = (drm_client_t __user *)arg;
253 if (copy_from_user(&client, argp, sizeof(client)))
256 mutex_lock(&dev->struct_mutex);
257 for (i = 0, pt = dev->file_first; i < idx && pt; i++, pt = pt->next) ;
260 mutex_unlock(&dev->struct_mutex);
263 client.auth = pt->authenticated;
264 client.pid = pt->pid;
265 client.uid = pt->uid;
266 client.magic = pt->magic;
267 client.iocs = pt->ioctl_count;
268 mutex_unlock(&dev->struct_mutex);
270 if (copy_to_user(argp, &client, sizeof(client)))
276 * Get statistics information.
278 * \param inode device inode.
279 * \param filp file pointer.
280 * \param cmd command.
281 * \param arg user argument, pointing to a drm_stats structure.
283 * \return zero on success or a negative number on failure.
285 int drm_getstats(struct inode *inode, struct file *filp,
286 unsigned int cmd, unsigned long arg)
288 drm_file_t *priv = filp->private_data;
289 drm_device_t *dev = priv->head->dev;
293 memset(&stats, 0, sizeof(stats));
295 mutex_lock(&dev->struct_mutex);
297 for (i = 0; i < dev->counters; i++) {
298 if (dev->types[i] == _DRM_STAT_LOCK)
300 = (dev->lock.hw_lock ? dev->lock.hw_lock->lock : 0);
302 stats.data[i].value = atomic_read(&dev->counts[i]);
303 stats.data[i].type = dev->types[i];
306 stats.count = dev->counters;
308 mutex_unlock(&dev->struct_mutex);
310 if (copy_to_user((drm_stats_t __user *) arg, &stats, sizeof(stats)))
318 * \param inode device inode.
319 * \param filp file pointer.
320 * \param cmd command.
321 * \param arg user argument, pointing to a drm_lock structure.
322 * \return zero on success or negative number on failure.
324 * Sets the requested interface version
326 int drm_setversion(DRM_IOCTL_ARGS)
329 drm_set_version_t sv;
330 drm_set_version_t retv;
332 drm_set_version_t __user *argp = (void __user *)data;
334 if (copy_from_user(&sv, argp, sizeof(sv)))
337 retv.drm_di_major = DRM_IF_MAJOR;
338 retv.drm_di_minor = DRM_IF_MINOR;
339 retv.drm_dd_major = dev->driver->major;
340 retv.drm_dd_minor = dev->driver->minor;
342 if (copy_to_user(argp, &retv, sizeof(sv)))
345 if (sv.drm_di_major != -1) {
346 if (sv.drm_di_major != DRM_IF_MAJOR ||
347 sv.drm_di_minor < 0 || sv.drm_di_minor > DRM_IF_MINOR)
349 if_version = DRM_IF_VERSION(sv.drm_di_major, sv.drm_di_minor);
350 dev->if_version = max(if_version, dev->if_version);
351 if (sv.drm_di_minor >= 1) {
353 * Version 1.1 includes tying of DRM to specific device
359 if (sv.drm_dd_major != -1) {
360 if (sv.drm_dd_major != dev->driver->major ||
362 || sv.drm_dd_minor > dev->driver->minor)
365 if (dev->driver->set_version)
366 dev->driver->set_version(dev, &sv);
372 int drm_noop(struct inode *inode, struct file *filp, unsigned int cmd,