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/drivers/char/drm/drm_ioctl.c

https://bitbucket.org/evzijst/gittest
C | 370 lines | 209 code | 49 blank | 112 comment | 54 complexity | d467c1a0b1d05429fdf1d90c5218849a MD5 | raw file
  1/**
  2 * \file drm_ioctl.h 
  3 * IOCTL processing for DRM
  4 *
  5 * \author Rickard E. (Rik) Faith <faith@valinux.com>
  6 * \author Gareth Hughes <gareth@valinux.com>
  7 */
  8
  9/*
 10 * Created: Fri Jan  8 09:01:26 1999 by faith@valinux.com
 11 *
 12 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
 13 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
 14 * All Rights Reserved.
 15 *
 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:
 22 *
 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
 25 * Software.
 26 *
 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.
 34 */
 35
 36#include "drmP.h"
 37#include "drm_core.h"
 38
 39#include "linux/pci.h"
 40
 41/**
 42 * Get the bus id.
 43 * 
 44 * \param inode device inode.
 45 * \param filp file pointer.
 46 * \param cmd command.
 47 * \param arg user argument, pointing to a drm_unique structure.
 48 * \return zero on success or a negative number on failure.
 49 *
 50 * Copies the bus id from drm_device::unique into user space.
 51 */
 52int drm_getunique(struct inode *inode, struct file *filp,
 53		   unsigned int cmd, unsigned long arg)
 54{
 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;
 58	drm_unique_t	 u;
 59
 60	if (copy_from_user(&u, argp, sizeof(u)))
 61		return -EFAULT;
 62	if (u.unique_len >= dev->unique_len) {
 63		if (copy_to_user(u.unique, dev->unique, dev->unique_len))
 64			return -EFAULT;
 65	}
 66	u.unique_len = dev->unique_len;
 67	if (copy_to_user(argp, &u, sizeof(u)))
 68		return -EFAULT;
 69	return 0;
 70}
 71
 72/**
 73 * Set the bus id.
 74 * 
 75 * \param inode device inode.
 76 * \param filp file pointer.
 77 * \param cmd command.
 78 * \param arg user argument, pointing to a drm_unique structure.
 79 * \return zero on success or a negative number on failure.
 80 *
 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.
 85 */
 86int drm_setunique(struct inode *inode, struct file *filp,
 87		   unsigned int cmd, unsigned long arg)
 88{
 89	drm_file_t	 *priv	 = filp->private_data;
 90	drm_device_t	 *dev	 = priv->head->dev;
 91	drm_unique_t	 u;
 92	int		 domain, bus, slot, func, ret;
 93
 94	if (dev->unique_len || dev->unique) return -EBUSY;
 95
 96	if (copy_from_user(&u, (drm_unique_t __user *)arg, sizeof(u)))
 97		return -EFAULT;
 98
 99	if (!u.unique_len || u.unique_len > 1024) return -EINVAL;
100
101	dev->unique_len = u.unique_len;
102	dev->unique	= drm_alloc(u.unique_len + 1, DRM_MEM_DRIVER);
103	if(!dev->unique) return -ENOMEM;
104	if (copy_from_user(dev->unique, u.unique, dev->unique_len))
105		return -EFAULT;
106
107	dev->unique[dev->unique_len] = '\0';
108
109	dev->devname = drm_alloc(strlen(dev->driver->pci_driver.name) + strlen(dev->unique) + 2,
110				  DRM_MEM_DRIVER);
111	if (!dev->devname)
112		return -ENOMEM;
113
114	sprintf(dev->devname, "%s@%s", dev->driver->pci_driver.name, dev->unique);
115
116	/* Return error if the busid submitted doesn't match the device's actual
117	 * busid.
118	 */
119	ret = sscanf(dev->unique, "PCI:%d:%d:%d", &bus, &slot, &func);
120	if (ret != 3)
121		return DRM_ERR(EINVAL);
122	domain = bus >> 8;
123	bus &= 0xff;
124	
125	if ((domain != dev->pci_domain) ||
126	    (bus != dev->pci_bus) ||
127	    (slot != dev->pci_slot) ||
128	    (func != dev->pci_func))
129		return -EINVAL;
130
131	return 0;
132}
133
134static int
135drm_set_busid(drm_device_t *dev)
136{
137	if (dev->unique != NULL)
138		return EBUSY;
139
140	dev->unique_len = 20;
141	dev->unique = drm_alloc(dev->unique_len + 1, DRM_MEM_DRIVER);
142	if (dev->unique == NULL)
143		return ENOMEM;
144
145	snprintf(dev->unique, dev->unique_len, "pci:%04x:%02x:%02x.%d",
146		dev->pci_domain, dev->pci_bus, dev->pci_slot, dev->pci_func);
147
148	dev->devname = drm_alloc(strlen(dev->driver->pci_driver.name) + dev->unique_len + 2,
149				DRM_MEM_DRIVER);
150	if (dev->devname == NULL)
151		return ENOMEM;
152
153	sprintf(dev->devname, "%s@%s", dev->driver->pci_driver.name, dev->unique);
154
155	return 0;
156}
157
158
159/**
160 * Get a mapping information.
161 *
162 * \param inode device inode.
163 * \param filp file pointer.
164 * \param cmd command.
165 * \param arg user argument, pointing to a drm_map structure.
166 * 
167 * \return zero on success or a negative number on failure.
168 *
169 * Searches for the mapping with the specified offset and copies its information
170 * into userspace
171 */
172int drm_getmap( struct inode *inode, struct file *filp,
173		 unsigned int cmd, unsigned long arg )
174{
175	drm_file_t   *priv = filp->private_data;
176	drm_device_t *dev  = priv->head->dev;
177	drm_map_t    __user *argp = (void __user *)arg;
178	drm_map_t    map;
179	drm_map_list_t *r_list = NULL;
180	struct list_head *list;
181	int          idx;
182	int	     i;
183
184	if (copy_from_user(&map, argp, sizeof(map)))
185		return -EFAULT;
186	idx = map.offset;
187
188	down(&dev->struct_sem);
189	if (idx < 0) {
190		up(&dev->struct_sem);
191		return -EINVAL;
192	}
193
194	i = 0;
195	list_for_each(list, &dev->maplist->head) {
196		if(i == idx) {
197			r_list = list_entry(list, drm_map_list_t, head);
198			break;
199		}
200		i++;
201	}
202	if(!r_list || !r_list->map) {
203		up(&dev->struct_sem);
204		return -EINVAL;
205	}
206
207	map.offset = r_list->map->offset;
208	map.size   = r_list->map->size;
209	map.type   = r_list->map->type;
210	map.flags  = r_list->map->flags;
211	map.handle = r_list->map->handle;
212	map.mtrr   = r_list->map->mtrr;
213	up(&dev->struct_sem);
214
215	if (copy_to_user(argp, &map, sizeof(map))) return -EFAULT;
216	return 0;
217}
218
219/**
220 * Get client information.
221 *
222 * \param inode device inode.
223 * \param filp file pointer.
224 * \param cmd command.
225 * \param arg user argument, pointing to a drm_client structure.
226 * 
227 * \return zero on success or a negative number on failure.
228 *
229 * Searches for the client with the specified index and copies its information
230 * into userspace
231 */
232int drm_getclient( struct inode *inode, struct file *filp,
233		    unsigned int cmd, unsigned long arg )
234{
235	drm_file_t   *priv = filp->private_data;
236	drm_device_t *dev  = priv->head->dev;
237	drm_client_t __user *argp = (void __user *)arg;
238	drm_client_t client;
239	drm_file_t   *pt;
240	int          idx;
241	int          i;
242
243	if (copy_from_user(&client, argp, sizeof(client)))
244		return -EFAULT;
245	idx = client.idx;
246	down(&dev->struct_sem);
247	for (i = 0, pt = dev->file_first; i < idx && pt; i++, pt = pt->next)
248		;
249
250	if (!pt) {
251		up(&dev->struct_sem);
252		return -EINVAL;
253	}
254	client.auth  = pt->authenticated;
255	client.pid   = pt->pid;
256	client.uid   = pt->uid;
257	client.magic = pt->magic;
258	client.iocs  = pt->ioctl_count;
259	up(&dev->struct_sem);
260
261	if (copy_to_user((drm_client_t __user *)arg, &client, sizeof(client)))
262		return -EFAULT;
263	return 0;
264}
265
266/** 
267 * Get statistics information. 
268 * 
269 * \param inode device inode.
270 * \param filp file pointer.
271 * \param cmd command.
272 * \param arg user argument, pointing to a drm_stats structure.
273 * 
274 * \return zero on success or a negative number on failure.
275 */
276int drm_getstats( struct inode *inode, struct file *filp,
277		   unsigned int cmd, unsigned long arg )
278{
279	drm_file_t   *priv = filp->private_data;
280	drm_device_t *dev  = priv->head->dev;
281	drm_stats_t  stats;
282	int          i;
283
284	memset(&stats, 0, sizeof(stats));
285	
286	down(&dev->struct_sem);
287
288	for (i = 0; i < dev->counters; i++) {
289		if (dev->types[i] == _DRM_STAT_LOCK)
290			stats.data[i].value
291				= (dev->lock.hw_lock
292				   ? dev->lock.hw_lock->lock : 0);
293		else 
294			stats.data[i].value = atomic_read(&dev->counts[i]);
295		stats.data[i].type  = dev->types[i];
296	}
297	
298	stats.count = dev->counters;
299
300	up(&dev->struct_sem);
301
302	if (copy_to_user((drm_stats_t __user *)arg, &stats, sizeof(stats)))
303		return -EFAULT;
304	return 0;
305}
306
307/**
308 * Setversion ioctl.
309 *
310 * \param inode device inode.
311 * \param filp file pointer.
312 * \param cmd command.
313 * \param arg user argument, pointing to a drm_lock structure.
314 * \return zero on success or negative number on failure.
315 *
316 * Sets the requested interface version
317 */
318int drm_setversion(DRM_IOCTL_ARGS)
319{
320	DRM_DEVICE;
321	drm_set_version_t sv;
322	drm_set_version_t retv;
323	int if_version;
324	drm_set_version_t __user *argp = (void __user *)data;
325	drm_version_t version;
326
327	DRM_COPY_FROM_USER_IOCTL(sv, argp, sizeof(sv));
328
329	memset(&version, 0, sizeof(version));
330
331	dev->driver->version(&version);
332	retv.drm_di_major = DRM_IF_MAJOR;
333	retv.drm_di_minor = DRM_IF_MINOR;
334	retv.drm_dd_major = version.version_major;
335	retv.drm_dd_minor = version.version_minor;
336
337	DRM_COPY_TO_USER_IOCTL(argp, retv, sizeof(sv));
338
339	if (sv.drm_di_major != -1) {
340		if (sv.drm_di_major != DRM_IF_MAJOR ||
341		    sv.drm_di_minor < 0 || sv.drm_di_minor > DRM_IF_MINOR)
342			return EINVAL;
343		if_version = DRM_IF_VERSION(sv.drm_di_major, sv.drm_dd_minor);
344		dev->if_version = DRM_MAX(if_version, dev->if_version);
345		if (sv.drm_di_minor >= 1) {
346			/*
347			 * Version 1.1 includes tying of DRM to specific device
348			 */
349			drm_set_busid(dev);
350		}
351	}
352
353	if (sv.drm_dd_major != -1) {
354		if (sv.drm_dd_major != version.version_major ||
355		    sv.drm_dd_minor < 0 || sv.drm_dd_minor > version.version_minor)
356			return EINVAL;
357
358		if (dev->driver->set_version)
359			dev->driver->set_version(dev, &sv);
360	}
361	return 0;
362}
363
364/** No-op ioctl. */
365int drm_noop(struct inode *inode, struct file *filp, unsigned int cmd,
366	       unsigned long arg)
367{
368	DRM_DEBUG("\n");
369	return 0;
370}