3 * Generic driver template
5 * \author Rickard E. (Rik) Faith <faith@valinux.com>
6 * \author Gareth Hughes <gareth@valinux.com>
8 * To use this template, you must at least define the following (samples
9 * given for the MGA driver):
12 * #define DRIVER_AUTHOR "VA Linux Systems, Inc."
14 * #define DRIVER_NAME "mga"
15 * #define DRIVER_DESC "Matrox G200/G400"
16 * #define DRIVER_DATE "20001127"
18 * #define drm_x mga_##x
23 * Created: Thu Nov 23 03:10:50 2000 by gareth@valinux.com
25 * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas.
26 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
27 * All Rights Reserved.
29 * Permission is hereby granted, free of charge, to any person obtaining a
30 * copy of this software and associated documentation files (the "Software"),
31 * to deal in the Software without restriction, including without limitation
32 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
33 * and/or sell copies of the Software, and to permit persons to whom the
34 * Software is furnished to do so, subject to the following conditions:
36 * The above copyright notice and this permission notice (including the next
37 * paragraph) shall be included in all copies or substantial portions of the
40 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
41 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
42 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
43 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
44 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
45 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
46 * OTHER DEALINGS IN THE SOFTWARE.
49 #include <linux/debugfs.h>
50 #include <linux/slab.h>
55 static int drm_version(struct drm_device
*dev
, void *data
,
56 struct drm_file
*file_priv
);
58 #define DRM_IOCTL_DEF(ioctl, _func, _flags) \
59 [DRM_IOCTL_NR(ioctl)] = {.cmd = ioctl, .func = _func, .flags = _flags, .cmd_drv = 0}
62 static struct drm_ioctl_desc drm_ioctls
[] = {
63 DRM_IOCTL_DEF(DRM_IOCTL_VERSION
, drm_version
, 0),
64 DRM_IOCTL_DEF(DRM_IOCTL_GET_UNIQUE
, drm_getunique
, 0),
65 DRM_IOCTL_DEF(DRM_IOCTL_GET_MAGIC
, drm_getmagic
, 0),
66 DRM_IOCTL_DEF(DRM_IOCTL_IRQ_BUSID
, drm_irq_by_busid
, DRM_MASTER
|DRM_ROOT_ONLY
),
67 DRM_IOCTL_DEF(DRM_IOCTL_GET_MAP
, drm_getmap
, 0),
68 DRM_IOCTL_DEF(DRM_IOCTL_GET_CLIENT
, drm_getclient
, 0),
69 DRM_IOCTL_DEF(DRM_IOCTL_GET_STATS
, drm_getstats
, 0),
70 DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION
, drm_setversion
, DRM_MASTER
),
72 DRM_IOCTL_DEF(DRM_IOCTL_SET_UNIQUE
, drm_setunique
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
73 DRM_IOCTL_DEF(DRM_IOCTL_BLOCK
, drm_noop
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
74 DRM_IOCTL_DEF(DRM_IOCTL_UNBLOCK
, drm_noop
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
75 DRM_IOCTL_DEF(DRM_IOCTL_AUTH_MAGIC
, drm_authmagic
, DRM_AUTH
|DRM_MASTER
),
77 DRM_IOCTL_DEF(DRM_IOCTL_ADD_MAP
, drm_addmap_ioctl
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
78 DRM_IOCTL_DEF(DRM_IOCTL_RM_MAP
, drm_rmmap_ioctl
, DRM_AUTH
),
80 DRM_IOCTL_DEF(DRM_IOCTL_SET_SAREA_CTX
, drm_setsareactx
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
81 DRM_IOCTL_DEF(DRM_IOCTL_GET_SAREA_CTX
, drm_getsareactx
, DRM_AUTH
),
83 DRM_IOCTL_DEF(DRM_IOCTL_SET_MASTER
, drm_setmaster_ioctl
, DRM_ROOT_ONLY
),
84 DRM_IOCTL_DEF(DRM_IOCTL_DROP_MASTER
, drm_dropmaster_ioctl
, DRM_ROOT_ONLY
),
86 DRM_IOCTL_DEF(DRM_IOCTL_ADD_CTX
, drm_addctx
, DRM_AUTH
|DRM_ROOT_ONLY
),
87 DRM_IOCTL_DEF(DRM_IOCTL_RM_CTX
, drm_rmctx
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
88 DRM_IOCTL_DEF(DRM_IOCTL_MOD_CTX
, drm_modctx
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
89 DRM_IOCTL_DEF(DRM_IOCTL_GET_CTX
, drm_getctx
, DRM_AUTH
),
90 DRM_IOCTL_DEF(DRM_IOCTL_SWITCH_CTX
, drm_switchctx
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
91 DRM_IOCTL_DEF(DRM_IOCTL_NEW_CTX
, drm_newctx
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
92 DRM_IOCTL_DEF(DRM_IOCTL_RES_CTX
, drm_resctx
, DRM_AUTH
),
94 DRM_IOCTL_DEF(DRM_IOCTL_ADD_DRAW
, drm_noop
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
95 DRM_IOCTL_DEF(DRM_IOCTL_RM_DRAW
, drm_noop
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
97 DRM_IOCTL_DEF(DRM_IOCTL_LOCK
, drm_lock
, DRM_AUTH
),
98 DRM_IOCTL_DEF(DRM_IOCTL_UNLOCK
, drm_unlock
, DRM_AUTH
),
100 DRM_IOCTL_DEF(DRM_IOCTL_FINISH
, drm_noop
, DRM_AUTH
),
102 DRM_IOCTL_DEF(DRM_IOCTL_ADD_BUFS
, drm_addbufs
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
103 DRM_IOCTL_DEF(DRM_IOCTL_MARK_BUFS
, drm_markbufs
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
104 DRM_IOCTL_DEF(DRM_IOCTL_INFO_BUFS
, drm_infobufs
, DRM_AUTH
),
105 DRM_IOCTL_DEF(DRM_IOCTL_MAP_BUFS
, drm_mapbufs
, DRM_AUTH
),
106 DRM_IOCTL_DEF(DRM_IOCTL_FREE_BUFS
, drm_freebufs
, DRM_AUTH
),
107 /* The DRM_IOCTL_DMA ioctl should be defined by the driver. */
108 DRM_IOCTL_DEF(DRM_IOCTL_DMA
, NULL
, DRM_AUTH
),
110 DRM_IOCTL_DEF(DRM_IOCTL_CONTROL
, drm_control
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
113 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ACQUIRE
, drm_agp_acquire_ioctl
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
114 DRM_IOCTL_DEF(DRM_IOCTL_AGP_RELEASE
, drm_agp_release_ioctl
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
115 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ENABLE
, drm_agp_enable_ioctl
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
116 DRM_IOCTL_DEF(DRM_IOCTL_AGP_INFO
, drm_agp_info_ioctl
, DRM_AUTH
),
117 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ALLOC
, drm_agp_alloc_ioctl
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
118 DRM_IOCTL_DEF(DRM_IOCTL_AGP_FREE
, drm_agp_free_ioctl
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
119 DRM_IOCTL_DEF(DRM_IOCTL_AGP_BIND
, drm_agp_bind_ioctl
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
120 DRM_IOCTL_DEF(DRM_IOCTL_AGP_UNBIND
, drm_agp_unbind_ioctl
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
123 DRM_IOCTL_DEF(DRM_IOCTL_SG_ALLOC
, drm_sg_alloc_ioctl
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
124 DRM_IOCTL_DEF(DRM_IOCTL_SG_FREE
, drm_sg_free
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
126 DRM_IOCTL_DEF(DRM_IOCTL_WAIT_VBLANK
, drm_wait_vblank
, 0),
128 DRM_IOCTL_DEF(DRM_IOCTL_MODESET_CTL
, drm_modeset_ctl
, 0),
130 DRM_IOCTL_DEF(DRM_IOCTL_UPDATE_DRAW
, drm_noop
, DRM_AUTH
|DRM_MASTER
|DRM_ROOT_ONLY
),
132 DRM_IOCTL_DEF(DRM_IOCTL_GEM_CLOSE
, drm_gem_close_ioctl
, DRM_UNLOCKED
),
133 DRM_IOCTL_DEF(DRM_IOCTL_GEM_FLINK
, drm_gem_flink_ioctl
, DRM_AUTH
|DRM_UNLOCKED
),
134 DRM_IOCTL_DEF(DRM_IOCTL_GEM_OPEN
, drm_gem_open_ioctl
, DRM_AUTH
|DRM_UNLOCKED
),
136 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETRESOURCES
, drm_mode_getresources
, DRM_MASTER
|DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
137 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCRTC
, drm_mode_getcrtc
, DRM_MASTER
|DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
138 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETCRTC
, drm_mode_setcrtc
, DRM_MASTER
|DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
139 DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR
, drm_mode_cursor_ioctl
, DRM_MASTER
|DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
140 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETGAMMA
, drm_mode_gamma_get_ioctl
, DRM_MASTER
|DRM_UNLOCKED
),
141 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETGAMMA
, drm_mode_gamma_set_ioctl
, DRM_MASTER
|DRM_UNLOCKED
),
142 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETENCODER
, drm_mode_getencoder
, DRM_MASTER
|DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
143 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCONNECTOR
, drm_mode_getconnector
, DRM_MASTER
|DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
144 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATTACHMODE
, drm_mode_attachmode_ioctl
, DRM_MASTER
|DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
145 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DETACHMODE
, drm_mode_detachmode_ioctl
, DRM_MASTER
|DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
146 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPERTY
, drm_mode_getproperty_ioctl
, DRM_MASTER
| DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
147 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPROPERTY
, drm_mode_connector_property_set_ioctl
, DRM_MASTER
|DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
148 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPBLOB
, drm_mode_getblob_ioctl
, DRM_MASTER
|DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
149 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETFB
, drm_mode_getfb
, DRM_MASTER
|DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
150 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB
, drm_mode_addfb
, DRM_MASTER
|DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
151 DRM_IOCTL_DEF(DRM_IOCTL_MODE_RMFB
, drm_mode_rmfb
, DRM_MASTER
|DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
152 DRM_IOCTL_DEF(DRM_IOCTL_MODE_PAGE_FLIP
, drm_mode_page_flip_ioctl
, DRM_MASTER
|DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
153 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DIRTYFB
, drm_mode_dirtyfb_ioctl
, DRM_MASTER
|DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
154 DRM_IOCTL_DEF(DRM_IOCTL_MODE_CREATE_DUMB
, drm_mode_create_dumb_ioctl
, DRM_MASTER
|DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
155 DRM_IOCTL_DEF(DRM_IOCTL_MODE_MAP_DUMB
, drm_mode_mmap_dumb_ioctl
, DRM_MASTER
|DRM_CONTROL_ALLOW
|DRM_UNLOCKED
),
156 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DESTROY_DUMB
, drm_mode_destroy_dumb_ioctl
, DRM_MASTER
|DRM_CONTROL_ALLOW
|DRM_UNLOCKED
)
159 #define DRM_CORE_IOCTL_COUNT ARRAY_SIZE( drm_ioctls )
162 * Take down the DRM device.
164 * \param dev DRM device structure.
166 * Frees every resource in \p dev.
170 int drm_lastclose(struct drm_device
* dev
)
172 struct drm_vma_entry
*vma
, *vma_temp
;
177 if (dev
->driver
->lastclose
)
178 dev
->driver
->lastclose(dev
);
179 DRM_DEBUG("driver lastclose completed\n");
181 if (dev
->irq_enabled
&& !drm_core_check_feature(dev
, DRIVER_MODESET
))
182 drm_irq_uninstall(dev
);
184 mutex_lock(&dev
->struct_mutex
);
186 /* Clear AGP information */
187 if (drm_core_has_AGP(dev
) && dev
->agp
&&
188 !drm_core_check_feature(dev
, DRIVER_MODESET
)) {
189 struct drm_agp_mem
*entry
, *tempe
;
191 /* Remove AGP resources, but leave dev->agp
192 intact until drv_cleanup is called. */
193 list_for_each_entry_safe(entry
, tempe
, &dev
->agp
->memory
, head
) {
195 drm_unbind_agp(entry
->memory
);
196 drm_free_agp(entry
->memory
, entry
->pages
);
199 INIT_LIST_HEAD(&dev
->agp
->memory
);
201 if (dev
->agp
->acquired
)
202 drm_agp_release(dev
);
204 dev
->agp
->acquired
= 0;
205 dev
->agp
->enabled
= 0;
207 if (drm_core_check_feature(dev
, DRIVER_SG
) && dev
->sg
&&
208 !drm_core_check_feature(dev
, DRIVER_MODESET
)) {
209 drm_sg_cleanup(dev
->sg
);
213 /* Clear vma list (only built for debugging) */
214 list_for_each_entry_safe(vma
, vma_temp
, &dev
->vmalist
, head
) {
215 list_del(&vma
->head
);
219 if (drm_core_check_feature(dev
, DRIVER_DMA_QUEUE
) && dev
->queuelist
) {
220 for (i
= 0; i
< dev
->queue_count
; i
++) {
221 kfree(dev
->queuelist
[i
]);
222 dev
->queuelist
[i
] = NULL
;
224 kfree(dev
->queuelist
);
225 dev
->queuelist
= NULL
;
227 dev
->queue_count
= 0;
229 if (drm_core_check_feature(dev
, DRIVER_HAVE_DMA
) &&
230 !drm_core_check_feature(dev
, DRIVER_MODESET
))
231 drm_dma_takedown(dev
);
233 dev
->dev_mapping
= NULL
;
234 mutex_unlock(&dev
->struct_mutex
);
236 DRM_DEBUG("lastclose completed\n");
240 /** File operations structure */
241 static const struct file_operations drm_stub_fops
= {
242 .owner
= THIS_MODULE
,
243 .open
= drm_stub_open
,
244 .llseek
= noop_llseek
,
247 static int __init
drm_core_init(void)
252 idr_init(&drm_minors_idr
);
254 if (register_chrdev(DRM_MAJOR
, "drm", &drm_stub_fops
))
257 drm_class
= drm_sysfs_create(THIS_MODULE
, "drm");
258 if (IS_ERR(drm_class
)) {
259 printk(KERN_ERR
"DRM: Error creating drm class.\n");
260 ret
= PTR_ERR(drm_class
);
264 drm_proc_root
= proc_mkdir("dri", NULL
);
265 if (!drm_proc_root
) {
266 DRM_ERROR("Cannot create /proc/dri\n");
271 drm_debugfs_root
= debugfs_create_dir("dri", NULL
);
272 if (!drm_debugfs_root
) {
273 DRM_ERROR("Cannot create /sys/kernel/debug/dri\n");
278 DRM_INFO("Initialized %s %d.%d.%d %s\n",
279 CORE_NAME
, CORE_MAJOR
, CORE_MINOR
, CORE_PATCHLEVEL
, CORE_DATE
);
284 unregister_chrdev(DRM_MAJOR
, "drm");
286 idr_destroy(&drm_minors_idr
);
291 static void __exit
drm_core_exit(void)
293 remove_proc_entry("dri", NULL
);
294 debugfs_remove(drm_debugfs_root
);
297 unregister_chrdev(DRM_MAJOR
, "drm");
299 idr_remove_all(&drm_minors_idr
);
300 idr_destroy(&drm_minors_idr
);
303 module_init(drm_core_init
);
304 module_exit(drm_core_exit
);
307 * Copy and IOCTL return string to user space
309 static int drm_copy_field(char *buf
, size_t *buf_len
, const char *value
)
313 /* don't overflow userbuf */
318 /* let userspace know exact length of driver value (which could be
319 * larger than the userspace-supplied buffer) */
320 *buf_len
= strlen(value
);
322 /* finally, try filling in the userbuf */
324 if (copy_to_user(buf
, value
, len
))
330 * Get version information
332 * \param inode device inode.
333 * \param filp file pointer.
334 * \param cmd command.
335 * \param arg user argument, pointing to a drm_version structure.
336 * \return zero on success or negative number on failure.
338 * Fills in the version information in \p arg.
340 static int drm_version(struct drm_device
*dev
, void *data
,
341 struct drm_file
*file_priv
)
343 struct drm_version
*version
= data
;
346 version
->version_major
= dev
->driver
->major
;
347 version
->version_minor
= dev
->driver
->minor
;
348 version
->version_patchlevel
= dev
->driver
->patchlevel
;
349 err
= drm_copy_field(version
->name
, &version
->name_len
,
352 err
= drm_copy_field(version
->date
, &version
->date_len
,
355 err
= drm_copy_field(version
->desc
, &version
->desc_len
,
362 * Called whenever a process performs an ioctl on /dev/drm.
364 * \param inode device inode.
365 * \param file_priv DRM file private.
366 * \param cmd command.
367 * \param arg user argument.
368 * \return zero on success or negative number on failure.
370 * Looks up the ioctl function in the ::ioctls table, checking for root
371 * previleges if so required, and dispatches to the respective function.
373 long drm_ioctl(struct file
*filp
,
374 unsigned int cmd
, unsigned long arg
)
376 struct drm_file
*file_priv
= filp
->private_data
;
377 struct drm_device
*dev
;
378 struct drm_ioctl_desc
*ioctl
;
380 unsigned int nr
= DRM_IOCTL_NR(cmd
);
381 int retcode
= -EINVAL
;
382 char stack_kdata
[128];
384 unsigned int usize
, asize
;
386 dev
= file_priv
->minor
->dev
;
387 atomic_inc(&dev
->ioctl_count
);
388 atomic_inc(&dev
->counts
[_DRM_STAT_IOCTLS
]);
389 ++file_priv
->ioctl_count
;
391 DRM_DEBUG("pid=%d, cmd=0x%02x, nr=0x%02x, dev 0x%lx, auth=%d\n",
392 task_pid_nr(current
), cmd
, nr
,
393 (long)old_encode_dev(file_priv
->minor
->device
),
394 file_priv
->authenticated
);
396 if ((nr
>= DRM_CORE_IOCTL_COUNT
) &&
397 ((nr
< DRM_COMMAND_BASE
) || (nr
>= DRM_COMMAND_END
)))
399 if ((nr
>= DRM_COMMAND_BASE
) && (nr
< DRM_COMMAND_END
) &&
400 (nr
< DRM_COMMAND_BASE
+ dev
->driver
->num_ioctls
)) {
402 ioctl
= &dev
->driver
->ioctls
[nr
- DRM_COMMAND_BASE
];
403 drv_size
= _IOC_SIZE(ioctl
->cmd_drv
);
404 usize
= asize
= _IOC_SIZE(cmd
);
405 if (drv_size
> asize
)
408 else if ((nr
>= DRM_COMMAND_END
) || (nr
< DRM_COMMAND_BASE
)) {
409 ioctl
= &drm_ioctls
[nr
];
411 usize
= asize
= _IOC_SIZE(cmd
);
415 /* Do not trust userspace, use our own definition */
417 /* is there a local override? */
418 if ((nr
== DRM_IOCTL_NR(DRM_IOCTL_DMA
)) && dev
->driver
->dma_ioctl
)
419 func
= dev
->driver
->dma_ioctl
;
422 DRM_DEBUG("no function\n");
424 } else if (((ioctl
->flags
& DRM_ROOT_ONLY
) && !capable(CAP_SYS_ADMIN
)) ||
425 ((ioctl
->flags
& DRM_AUTH
) && !file_priv
->authenticated
) ||
426 ((ioctl
->flags
& DRM_MASTER
) && !file_priv
->is_master
) ||
427 (!(ioctl
->flags
& DRM_CONTROL_ALLOW
) && (file_priv
->minor
->type
== DRM_MINOR_CONTROL
))) {
430 if (cmd
& (IOC_IN
| IOC_OUT
)) {
431 if (asize
<= sizeof(stack_kdata
)) {
434 kdata
= kmalloc(asize
, GFP_KERNEL
);
443 if (copy_from_user(kdata
, (void __user
*)arg
,
449 memset(kdata
, 0, usize
);
451 if (ioctl
->flags
& DRM_UNLOCKED
)
452 retcode
= func(dev
, kdata
, file_priv
);
454 mutex_lock(&drm_global_mutex
);
455 retcode
= func(dev
, kdata
, file_priv
);
456 mutex_unlock(&drm_global_mutex
);
460 if (copy_to_user((void __user
*)arg
, kdata
,
467 if (kdata
!= stack_kdata
)
469 atomic_dec(&dev
->ioctl_count
);
471 DRM_DEBUG("ret = %x\n", retcode
);
475 EXPORT_SYMBOL(drm_ioctl
);
477 struct drm_local_map
*drm_getsarea(struct drm_device
*dev
)
479 struct drm_map_list
*entry
;
481 list_for_each_entry(entry
, &dev
->maplist
, head
) {
482 if (entry
->map
&& entry
->map
->type
== _DRM_SHM
&&
483 (entry
->map
->flags
& _DRM_CONTAINS_LOCK
)) {
489 EXPORT_SYMBOL(drm_getsarea
);