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 != drm_get_pci_domain(dev)) ||
131 (bus != dev->pdev->bus->number) ||
132 (slot != PCI_SLOT(dev->pdev->devfn)) ||
133 (func != PCI_FUNC(dev->pdev->devfn)))
139 static int drm_set_busid(drm_device_t * dev)
143 if (dev->unique != NULL)
146 dev->unique_len = 40;
147 dev->unique = drm_alloc(dev->unique_len + 1, DRM_MEM_DRIVER);
148 if (dev->unique == NULL)
151 len = snprintf(dev->unique, dev->unique_len, "pci:%04x:%02x:%02x.%d",
152 drm_get_pci_domain(dev), dev->pdev->bus->number,
153 PCI_SLOT(dev->pdev->devfn),
154 PCI_FUNC(dev->pdev->devfn));
156 if (len > dev->unique_len)
157 DRM_ERROR("Unique buffer overflowed\n");
160 drm_alloc(strlen(dev->driver->pci_driver.name) + dev->unique_len +
162 if (dev->devname == NULL)
165 sprintf(dev->devname, "%s@%s", dev->driver->pci_driver.name,
172 * Get a mapping information.
174 * \param inode device inode.
175 * \param filp file pointer.
176 * \param cmd command.
177 * \param arg user argument, pointing to a drm_map structure.
179 * \return zero on success or a negative number on failure.
181 * Searches for the mapping with the specified offset and copies its information
184 int drm_getmap(struct inode *inode, struct file *filp,
185 unsigned int cmd, unsigned long arg)
187 drm_file_t *priv = filp->private_data;
188 drm_device_t *dev = priv->head->dev;
189 drm_map_t __user *argp = (void __user *)arg;
191 drm_map_list_t *r_list = NULL;
192 struct list_head *list;
196 if (copy_from_user(&map, argp, sizeof(map)))
200 mutex_lock(&dev->struct_mutex);
202 mutex_unlock(&dev->struct_mutex);
207 list_for_each(list, &dev->maplist->head) {
209 r_list = list_entry(list, drm_map_list_t, head);
214 if (!r_list || !r_list->map) {
215 mutex_unlock(&dev->struct_mutex);
219 map.offset = r_list->map->offset;
220 map.size = r_list->map->size;
221 map.type = r_list->map->type;
222 map.flags = r_list->map->flags;
223 map.handle = (void *)(unsigned long)r_list->user_token;
224 map.mtrr = r_list->map->mtrr;
225 mutex_unlock(&dev->struct_mutex);
227 if (copy_to_user(argp, &map, sizeof(map)))
233 * Get client information.
235 * \param inode device inode.
236 * \param filp file pointer.
237 * \param cmd command.
238 * \param arg user argument, pointing to a drm_client structure.
240 * \return zero on success or a negative number on failure.
242 * Searches for the client with the specified index and copies its information
245 int drm_getclient(struct inode *inode, struct file *filp,
246 unsigned int cmd, unsigned long arg)
248 drm_file_t *priv = filp->private_data;
249 drm_device_t *dev = priv->head->dev;
250 drm_client_t __user *argp = (drm_client_t __user *)arg;
256 if (copy_from_user(&client, argp, sizeof(client)))
259 mutex_lock(&dev->struct_mutex);
260 for (i = 0, pt = dev->file_first; i < idx && pt; i++, pt = pt->next) ;
263 mutex_unlock(&dev->struct_mutex);
266 client.auth = pt->authenticated;
267 client.pid = pt->pid;
268 client.uid = pt->uid;
269 client.magic = pt->magic;
270 client.iocs = pt->ioctl_count;
271 mutex_unlock(&dev->struct_mutex);
273 if (copy_to_user(argp, &client, sizeof(client)))
279 * Get statistics information.
281 * \param inode device inode.
282 * \param filp file pointer.
283 * \param cmd command.
284 * \param arg user argument, pointing to a drm_stats structure.
286 * \return zero on success or a negative number on failure.
288 int drm_getstats(struct inode *inode, struct file *filp,
289 unsigned int cmd, unsigned long arg)
291 drm_file_t *priv = filp->private_data;
292 drm_device_t *dev = priv->head->dev;
296 memset(&stats, 0, sizeof(stats));
298 mutex_lock(&dev->struct_mutex);
300 for (i = 0; i < dev->counters; i++) {
301 if (dev->types[i] == _DRM_STAT_LOCK)
303 = (dev->lock.hw_lock ? dev->lock.hw_lock->lock : 0);
305 stats.data[i].value = atomic_read(&dev->counts[i]);
306 stats.data[i].type = dev->types[i];
309 stats.count = dev->counters;
311 mutex_unlock(&dev->struct_mutex);
313 if (copy_to_user((drm_stats_t __user *) arg, &stats, sizeof(stats)))
321 * \param inode device inode.
322 * \param filp file pointer.
323 * \param cmd command.
324 * \param arg user argument, pointing to a drm_lock structure.
325 * \return zero on success or negative number on failure.
327 * Sets the requested interface version
329 int drm_setversion(DRM_IOCTL_ARGS)
332 drm_set_version_t sv;
333 drm_set_version_t retv;
335 drm_set_version_t __user *argp = (void __user *)data;
338 if (copy_from_user(&sv, argp, sizeof(sv)))
341 retv.drm_di_major = DRM_IF_MAJOR;
342 retv.drm_di_minor = DRM_IF_MINOR;
343 retv.drm_dd_major = dev->driver->major;
344 retv.drm_dd_minor = dev->driver->minor;
346 if (copy_to_user(argp, &retv, sizeof(retv)))
349 if (sv.drm_di_major != -1) {
350 if (sv.drm_di_major != DRM_IF_MAJOR ||
351 sv.drm_di_minor < 0 || sv.drm_di_minor > DRM_IF_MINOR)
353 if_version = DRM_IF_VERSION(sv.drm_di_major, sv.drm_di_minor);
354 dev->if_version = max(if_version, dev->if_version);
355 if (sv.drm_di_minor >= 1) {
357 * Version 1.1 includes tying of DRM to specific device
359 ret = drm_set_busid(dev);
365 if (sv.drm_dd_major != -1) {
366 if (sv.drm_dd_major != dev->driver->major ||
368 || sv.drm_dd_minor > dev->driver->minor)
371 if (dev->driver->set_version)
372 dev->driver->set_version(dev, &sv);
378 int drm_noop(struct inode *inode, struct file *filp, unsigned int cmd,