drm_ioctl.c revision 182080 
1/*-
2 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
3 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the next
14 * paragraph) shall be included in all copies or substantial portions of the
15 * Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
20 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
21 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
22 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
23 * OTHER DEALINGS IN THE SOFTWARE.
24 *
25 * Authors:
26 *    Rickard E. (Rik) Faith <faith@valinux.com>
27 *    Gareth Hughes <gareth@valinux.com>
28 *
29 */
30
31#include <sys/cdefs.h>
32__FBSDID("$FreeBSD: head/sys/dev/drm/drm_ioctl.c 182080 2008-08-23 20:59:12Z rnoland $");
33
34/** @file drm_ioctl.c
35 * Varios minor DRM ioctls not applicable to other files, such as versioning
36 * information and reporting DRM information to userland.
37 */
38
39#include "dev/drm/drmP.h"
40
41/*
42 * Beginning in revision 1.1 of the DRM interface, getunique will return
43 * a unique in the form pci:oooo:bb:dd.f (o=domain, b=bus, d=device, f=function)
44 * before setunique has been called.  The format for the bus-specific part of
45 * the unique is not defined for any other bus.
46 */
47int drm_getunique(struct drm_device *dev, void *data,
48		  struct drm_file *file_priv)
49{
50	drm_unique_t	 *u = data;
51
52	if (u->unique_len >= dev->unique_len) {
53		if (DRM_COPY_TO_USER(u->unique, dev->unique, dev->unique_len))
54			return EFAULT;
55	}
56	u->unique_len = dev->unique_len;
57
58	return 0;
59}
60
61/* Deprecated in DRM version 1.1, and will return EBUSY when setversion has
62 * requested version 1.1 or greater.
63 */
64int drm_setunique(struct drm_device *dev, void *data,
65		  struct drm_file *file_priv)
66{
67	drm_unique_t *u = data;
68	int domain, bus, slot, func, ret;
69	char *busid;
70
71	/* Check and copy in the submitted Bus ID */
72	if (!u->unique_len || u->unique_len > 1024)
73		return EINVAL;
74
75	busid = malloc(u->unique_len + 1, M_DRM, M_WAITOK);
76	if (busid == NULL)
77		return ENOMEM;
78
79	if (DRM_COPY_FROM_USER(busid, u->unique, u->unique_len)) {
80		free(busid, M_DRM);
81		return EFAULT;
82	}
83	busid[u->unique_len] = '\0';
84
85	/* Return error if the busid submitted doesn't match the device's actual
86	 * busid.
87	 */
88	ret = sscanf(busid, "PCI:%d:%d:%d", &bus, &slot, &func);
89	if (ret != 3) {
90		free(busid, M_DRM);
91		return EINVAL;
92	}
93	domain = bus >> 8;
94	bus &= 0xff;
95
96	if ((domain != dev->pci_domain) ||
97	    (bus != dev->pci_bus) ||
98	    (slot != dev->pci_slot) ||
99	    (func != dev->pci_func)) {
100		free(busid, M_DRM);
101		return EINVAL;
102	}
103
104	/* Actually set the device's busid now. */
105	DRM_LOCK();
106	if (dev->unique_len || dev->unique) {
107		DRM_UNLOCK();
108		return EBUSY;
109	}
110
111	dev->unique_len = u->unique_len;
112	dev->unique = busid;
113	DRM_UNLOCK();
114
115	return 0;
116}
117
118
119static int
120drm_set_busid(struct drm_device *dev)
121{
122
123	DRM_LOCK();
124
125	if (dev->unique != NULL) {
126		DRM_UNLOCK();
127		return EBUSY;
128	}
129
130	dev->unique_len = 20;
131	dev->unique = malloc(dev->unique_len + 1, M_DRM, M_NOWAIT);
132	if (dev->unique == NULL) {
133		DRM_UNLOCK();
134		return ENOMEM;
135	}
136
137	snprintf(dev->unique, dev->unique_len, "pci:%04x:%02x:%02x.%1x",
138	    dev->pci_domain, dev->pci_bus, dev->pci_slot, dev->pci_func);
139
140	DRM_UNLOCK();
141
142	return 0;
143}
144
145int drm_getmap(struct drm_device *dev, void *data, struct drm_file *file_priv)
146{
147	drm_map_t    *map = data;
148	drm_local_map_t    *mapinlist;
149	int          idx;
150	int	     i = 0;
151
152	idx = map->offset;
153
154	DRM_LOCK();
155	if (idx < 0) {
156		DRM_UNLOCK();
157		return EINVAL;
158	}
159
160	TAILQ_FOREACH(mapinlist, &dev->maplist, link) {
161		if (i==idx) {
162			map->offset = mapinlist->offset;
163			map->size   = mapinlist->size;
164			map->type   = mapinlist->type;
165			map->flags  = mapinlist->flags;
166			map->handle = mapinlist->handle;
167			map->mtrr   = mapinlist->mtrr;
168			break;
169		}
170		i++;
171	}
172
173	DRM_UNLOCK();
174
175 	if (mapinlist == NULL)
176		return EINVAL;
177
178	return 0;
179}
180
181int drm_getclient(struct drm_device *dev, void *data,
182		  struct drm_file *file_priv)
183{
184	drm_client_t *client = data;
185	drm_file_t   *pt;
186	int          idx;
187	int          i = 0;
188
189	idx = client->idx;
190	DRM_LOCK();
191	TAILQ_FOREACH(pt, &dev->files, link) {
192		if (i==idx)
193		{
194			client->auth  = pt->authenticated;
195			client->pid   = pt->pid;
196			client->uid   = pt->uid;
197			client->magic = pt->magic;
198			client->iocs  = pt->ioctl_count;
199			DRM_UNLOCK();
200			return 0;
201		}
202		i++;
203	}
204	DRM_UNLOCK();
205
206	return EINVAL;
207}
208
209int drm_getstats(struct drm_device *dev, void *data, struct drm_file *file_priv)
210{
211	drm_stats_t  *stats = data;
212	int          i;
213
214	memset(stats, 0, sizeof(drm_stats_t));
215
216	DRM_LOCK();
217
218	for (i = 0; i < dev->counters; i++) {
219		if (dev->types[i] == _DRM_STAT_LOCK)
220			stats->data[i].value
221				= (dev->lock.hw_lock
222				   ? dev->lock.hw_lock->lock : 0);
223		else
224			stats->data[i].value = atomic_read(&dev->counts[i]);
225		stats->data[i].type  = dev->types[i];
226	}
227
228	stats->count = dev->counters;
229
230	DRM_UNLOCK();
231
232	return 0;
233}
234
235#define DRM_IF_MAJOR	1
236#define DRM_IF_MINOR	2
237
238int drm_setversion(struct drm_device *dev, void *data,
239		   struct drm_file *file_priv)
240{
241	drm_set_version_t *sv = data;
242	drm_set_version_t ver;
243	int if_version;
244
245	/* Save the incoming data, and set the response before continuing
246	 * any further.
247	 */
248	ver = *sv;
249	sv->drm_di_major = DRM_IF_MAJOR;
250	sv->drm_di_minor = DRM_IF_MINOR;
251	sv->drm_dd_major = dev->driver.major;
252	sv->drm_dd_minor = dev->driver.minor;
253
254	if (ver.drm_di_major != -1) {
255		if (ver.drm_di_major != DRM_IF_MAJOR ||
256		    ver.drm_di_minor < 0 || ver.drm_di_minor > DRM_IF_MINOR) {
257			return EINVAL;
258		}
259		if_version = DRM_IF_VERSION(ver.drm_di_major,
260		    ver.drm_dd_minor);
261		dev->if_version = DRM_MAX(if_version, dev->if_version);
262		if (ver.drm_di_minor >= 1) {
263			/*
264			 * Version 1.1 includes tying of DRM to specific device
265			 */
266			drm_set_busid(dev);
267		}
268	}
269
270	if (ver.drm_dd_major != -1) {
271		if (ver.drm_dd_major != dev->driver.major ||
272		    ver.drm_dd_minor < 0 ||
273		    ver.drm_dd_minor > dev->driver.minor)
274		{
275			return EINVAL;
276		}
277	}
278
279	return 0;
280}
281
282
283int drm_noop(struct drm_device *dev, void *data, struct drm_file *file_priv)
284{
285	DRM_DEBUG("\n");
286	return 0;
287}
288