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
;
70 * \param inode device inode.
71 * \param file_priv DRM file private.
73 * \param arg user argument, pointing to a drm_unique structure.
74 * \return zero on success or a negative number on failure.
76 * Copies the bus id from userspace into drm_device::unique, and verifies that
77 * it matches the device this DRM is attached to (EINVAL otherwise). Deprecated
78 * in interface version 1.1 and will return EBUSY when setversion has requested
79 * version 1.1 or greater.
81 int drm_setunique(struct drm_device
*dev
, void *data
,
82 struct drm_file
*file_priv
)
84 struct drm_unique
*u
= data
;
85 struct drm_master
*master
= file_priv
->master
;
86 int domain
, bus
, slot
, func
, ret
;
88 if (master
->unique_len
|| master
->unique
)
91 if (!u
->unique_len
|| u
->unique_len
> 1024)
94 master
->unique_len
= u
->unique_len
;
95 master
->unique_size
= u
->unique_len
+ 1;
96 master
->unique
= kmalloc(master
->unique_size
, GFP_KERNEL
);
99 if (copy_from_user(master
->unique
, u
->unique
, master
->unique_len
))
102 master
->unique
[master
->unique_len
] = '\0';
104 dev
->devname
= kmalloc(strlen(dev
->driver
->pci_driver
.name
) +
105 strlen(master
->unique
) + 2, GFP_KERNEL
);
109 sprintf(dev
->devname
, "%s@%s", dev
->driver
->pci_driver
.name
,
112 /* Return error if the busid submitted doesn't match the device's actual
115 ret
= sscanf(master
->unique
, "PCI:%d:%d:%d", &bus
, &slot
, &func
);
121 if ((domain
!= drm_get_pci_domain(dev
)) ||
122 (bus
!= dev
->pdev
->bus
->number
) ||
123 (slot
!= PCI_SLOT(dev
->pdev
->devfn
)) ||
124 (func
!= PCI_FUNC(dev
->pdev
->devfn
)))
130 static int drm_set_busid(struct drm_device
*dev
, struct drm_file
*file_priv
)
132 struct drm_master
*master
= file_priv
->master
;
135 if (drm_core_check_feature(dev
, DRIVER_USE_PLATFORM_DEVICE
)) {
136 master
->unique_len
= 10 + strlen(dev
->platformdev
->name
);
137 master
->unique
= kmalloc(master
->unique_len
+ 1, GFP_KERNEL
);
139 if (master
->unique
== NULL
)
142 len
= snprintf(master
->unique
, master
->unique_len
,
143 "platform:%s", dev
->platformdev
->name
);
145 if (len
> master
->unique_len
)
146 DRM_ERROR("Unique buffer overflowed\n");
149 kmalloc(strlen(dev
->platformdev
->name
) +
150 master
->unique_len
+ 2, GFP_KERNEL
);
152 if (dev
->devname
== NULL
)
155 sprintf(dev
->devname
, "%s@%s", dev
->platformdev
->name
,
159 master
->unique_len
= 40;
160 master
->unique_size
= master
->unique_len
;
161 master
->unique
= kmalloc(master
->unique_size
, GFP_KERNEL
);
162 if (master
->unique
== NULL
)
165 len
= snprintf(master
->unique
, master
->unique_len
,
166 "pci:%04x:%02x:%02x.%d",
167 drm_get_pci_domain(dev
),
168 dev
->pdev
->bus
->number
,
169 PCI_SLOT(dev
->pdev
->devfn
),
170 PCI_FUNC(dev
->pdev
->devfn
));
171 if (len
>= master
->unique_len
)
172 DRM_ERROR("buffer overflow");
174 master
->unique_len
= len
;
177 kmalloc(strlen(dev
->driver
->pci_driver
.name
) +
178 master
->unique_len
+ 2, GFP_KERNEL
);
180 if (dev
->devname
== NULL
)
183 sprintf(dev
->devname
, "%s@%s", dev
->driver
->pci_driver
.name
,
191 * Get a mapping information.
193 * \param inode device inode.
194 * \param file_priv DRM file private.
195 * \param cmd command.
196 * \param arg user argument, pointing to a drm_map structure.
198 * \return zero on success or a negative number on failure.
200 * Searches for the mapping with the specified offset and copies its information
203 int drm_getmap(struct drm_device
*dev
, void *data
,
204 struct drm_file
*file_priv
)
206 struct drm_map
*map
= data
;
207 struct drm_map_list
*r_list
= NULL
;
208 struct list_head
*list
;
214 mutex_lock(&dev
->struct_mutex
);
216 mutex_unlock(&dev
->struct_mutex
);
221 list_for_each(list
, &dev
->maplist
) {
223 r_list
= list_entry(list
, struct drm_map_list
, head
);
228 if (!r_list
|| !r_list
->map
) {
229 mutex_unlock(&dev
->struct_mutex
);
233 map
->offset
= r_list
->map
->offset
;
234 map
->size
= r_list
->map
->size
;
235 map
->type
= r_list
->map
->type
;
236 map
->flags
= r_list
->map
->flags
;
237 map
->handle
= (void *)(unsigned long) r_list
->user_token
;
238 map
->mtrr
= r_list
->map
->mtrr
;
239 mutex_unlock(&dev
->struct_mutex
);
245 * Get client information.
247 * \param inode device inode.
248 * \param file_priv DRM file private.
249 * \param cmd command.
250 * \param arg user argument, pointing to a drm_client structure.
252 * \return zero on success or a negative number on failure.
254 * Searches for the client with the specified index and copies its information
257 int drm_getclient(struct drm_device
*dev
, void *data
,
258 struct drm_file
*file_priv
)
260 struct drm_client
*client
= data
;
266 mutex_lock(&dev
->struct_mutex
);
269 list_for_each_entry(pt
, &dev
->filelist
, lhead
) {
271 client
->auth
= pt
->authenticated
;
272 client
->pid
= pt
->pid
;
273 client
->uid
= pt
->uid
;
274 client
->magic
= pt
->magic
;
275 client
->iocs
= pt
->ioctl_count
;
276 mutex_unlock(&dev
->struct_mutex
);
281 mutex_unlock(&dev
->struct_mutex
);
287 * Get statistics information.
289 * \param inode device inode.
290 * \param file_priv DRM file private.
291 * \param cmd command.
292 * \param arg user argument, pointing to a drm_stats structure.
294 * \return zero on success or a negative number on failure.
296 int drm_getstats(struct drm_device
*dev
, void *data
,
297 struct drm_file
*file_priv
)
299 struct drm_stats
*stats
= data
;
302 memset(stats
, 0, sizeof(*stats
));
304 mutex_lock(&dev
->struct_mutex
);
306 for (i
= 0; i
< dev
->counters
; i
++) {
307 if (dev
->types
[i
] == _DRM_STAT_LOCK
)
308 stats
->data
[i
].value
=
309 (file_priv
->master
->lock
.hw_lock
? file_priv
->master
->lock
.hw_lock
->lock
: 0);
311 stats
->data
[i
].value
= atomic_read(&dev
->counts
[i
]);
312 stats
->data
[i
].type
= dev
->types
[i
];
315 stats
->count
= dev
->counters
;
317 mutex_unlock(&dev
->struct_mutex
);
325 * \param inode device inode.
326 * \param file_priv DRM file private.
327 * \param cmd command.
328 * \param arg user argument, pointing to a drm_lock structure.
329 * \return zero on success or negative number on failure.
331 * Sets the requested interface version
333 int drm_setversion(struct drm_device
*dev
, void *data
, struct drm_file
*file_priv
)
335 struct drm_set_version
*sv
= data
;
336 int if_version
, retcode
= 0;
338 if (sv
->drm_di_major
!= -1) {
339 if (sv
->drm_di_major
!= DRM_IF_MAJOR
||
340 sv
->drm_di_minor
< 0 || sv
->drm_di_minor
> DRM_IF_MINOR
) {
344 if_version
= DRM_IF_VERSION(sv
->drm_di_major
,
346 dev
->if_version
= max(if_version
, dev
->if_version
);
347 if (sv
->drm_di_minor
>= 1) {
349 * Version 1.1 includes tying of DRM to specific device
351 drm_set_busid(dev
, file_priv
);
355 if (sv
->drm_dd_major
!= -1) {
356 if (sv
->drm_dd_major
!= dev
->driver
->major
||
357 sv
->drm_dd_minor
< 0 || sv
->drm_dd_minor
>
358 dev
->driver
->minor
) {
363 if (dev
->driver
->set_version
)
364 dev
->driver
->set_version(dev
, sv
);
368 sv
->drm_di_major
= DRM_IF_MAJOR
;
369 sv
->drm_di_minor
= DRM_IF_MINOR
;
370 sv
->drm_dd_major
= dev
->driver
->major
;
371 sv
->drm_dd_minor
= dev
->driver
->minor
;
377 int drm_noop(struct drm_device
*dev
, void *data
,
378 struct drm_file
*file_priv
)