1 /**
2 * \file drm_drv.c
3 * Generic driver template
4 *
5 * \author Rickard E. (Rik) Faith <faith@valinux.com>
6 * \author Gareth Hughes <gareth@valinux.com>
7 *
8 * To use this template, you must at least define the following (samples
9 * given for the MGA driver):
10 *
11 * \code
12 * #define DRIVER_AUTHOR "VA Linux Systems, Inc."
13 *
14 * #define DRIVER_NAME "mga"
15 * #define DRIVER_DESC "Matrox G200/G400"
16 * #define DRIVER_DATE "20001127"
17 *
18 * #define drm_x mga_##x
19 * \endcode
20 */
21
22 /*
23 * Created: Thu Nov 23 03:10:50 2000 by gareth@valinux.com
24 *
25 * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas.
26 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
27 * All Rights Reserved.
28 *
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:
35 *
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
38 * Software.
39 *
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.
47 */
48
49 #include <sys/cdefs.h>
50 #include <sys/sysent.h>
51
52 #include <dev/drm2/drmP.h>
53 #include <dev/drm2/drm_core.h>
54 #include <dev/drm2/drm_global.h>
55
56 struct sx drm_global_mutex;
57
58 /** Ioctl table */
59 static struct drm_ioctl_desc drm_ioctls[] = {
60 DRM_IOCTL_DEF(DRM_IOCTL_VERSION, drm_version, DRM_UNLOCKED),
61 DRM_IOCTL_DEF(DRM_IOCTL_GET_UNIQUE, drm_getunique, 0),
62 DRM_IOCTL_DEF(DRM_IOCTL_GET_MAGIC, drm_getmagic, 0),
63 DRM_IOCTL_DEF(DRM_IOCTL_IRQ_BUSID, drm_irq_by_busid, DRM_MASTER|DRM_ROOT_ONLY),
64 DRM_IOCTL_DEF(DRM_IOCTL_GET_MAP, drm_getmap, DRM_UNLOCKED),
65 DRM_IOCTL_DEF(DRM_IOCTL_GET_CLIENT, drm_getclient, DRM_UNLOCKED),
66 DRM_IOCTL_DEF(DRM_IOCTL_GET_STATS, drm_getstats, DRM_UNLOCKED),
67 DRM_IOCTL_DEF(DRM_IOCTL_GET_CAP, drm_getcap, DRM_UNLOCKED),
68 DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION, drm_setversion, DRM_MASTER),
69
70 DRM_IOCTL_DEF(DRM_IOCTL_SET_UNIQUE, drm_setunique, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
71 DRM_IOCTL_DEF(DRM_IOCTL_BLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
72 DRM_IOCTL_DEF(DRM_IOCTL_UNBLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
73 DRM_IOCTL_DEF(DRM_IOCTL_AUTH_MAGIC, drm_authmagic, DRM_AUTH|DRM_MASTER),
74
75 DRM_IOCTL_DEF(DRM_IOCTL_ADD_MAP, drm_addmap_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
76 DRM_IOCTL_DEF(DRM_IOCTL_RM_MAP, drm_rmmap_ioctl, DRM_AUTH),
77
78 DRM_IOCTL_DEF(DRM_IOCTL_SET_SAREA_CTX, drm_setsareactx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
79 DRM_IOCTL_DEF(DRM_IOCTL_GET_SAREA_CTX, drm_getsareactx, DRM_AUTH),
80
81 DRM_IOCTL_DEF(DRM_IOCTL_SET_MASTER, drm_setmaster_ioctl, DRM_ROOT_ONLY),
82 DRM_IOCTL_DEF(DRM_IOCTL_DROP_MASTER, drm_dropmaster_ioctl, DRM_ROOT_ONLY),
83
84 DRM_IOCTL_DEF(DRM_IOCTL_ADD_CTX, drm_addctx, DRM_AUTH|DRM_ROOT_ONLY),
85 DRM_IOCTL_DEF(DRM_IOCTL_RM_CTX, drm_rmctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
86 DRM_IOCTL_DEF(DRM_IOCTL_MOD_CTX, drm_modctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
87 DRM_IOCTL_DEF(DRM_IOCTL_GET_CTX, drm_getctx, DRM_AUTH),
88 DRM_IOCTL_DEF(DRM_IOCTL_SWITCH_CTX, drm_switchctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
89 DRM_IOCTL_DEF(DRM_IOCTL_NEW_CTX, drm_newctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
90 DRM_IOCTL_DEF(DRM_IOCTL_RES_CTX, drm_resctx, DRM_AUTH),
91
92 DRM_IOCTL_DEF(DRM_IOCTL_ADD_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
93 DRM_IOCTL_DEF(DRM_IOCTL_RM_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
94
95 DRM_IOCTL_DEF(DRM_IOCTL_LOCK, drm_lock, DRM_AUTH),
96 DRM_IOCTL_DEF(DRM_IOCTL_UNLOCK, drm_unlock, DRM_AUTH),
97
98 DRM_IOCTL_DEF(DRM_IOCTL_FINISH, drm_noop, DRM_AUTH),
99
100 DRM_IOCTL_DEF(DRM_IOCTL_ADD_BUFS, drm_addbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
101 DRM_IOCTL_DEF(DRM_IOCTL_MARK_BUFS, drm_markbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
102 DRM_IOCTL_DEF(DRM_IOCTL_INFO_BUFS, drm_infobufs, DRM_AUTH),
103 DRM_IOCTL_DEF(DRM_IOCTL_MAP_BUFS, drm_mapbufs, DRM_AUTH),
104 DRM_IOCTL_DEF(DRM_IOCTL_FREE_BUFS, drm_freebufs, DRM_AUTH),
105 /* The DRM_IOCTL_DMA ioctl should be defined by the driver. */
106 DRM_IOCTL_DEF(DRM_IOCTL_DMA, NULL, DRM_AUTH),
107
108 DRM_IOCTL_DEF(DRM_IOCTL_CONTROL, drm_control, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
109
110 #if __OS_HAS_AGP
111 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ACQUIRE, drm_agp_acquire_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
112 DRM_IOCTL_DEF(DRM_IOCTL_AGP_RELEASE, drm_agp_release_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
113 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ENABLE, drm_agp_enable_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
114 DRM_IOCTL_DEF(DRM_IOCTL_AGP_INFO, drm_agp_info_ioctl, DRM_AUTH),
115 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ALLOC, drm_agp_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
116 DRM_IOCTL_DEF(DRM_IOCTL_AGP_FREE, drm_agp_free_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
117 DRM_IOCTL_DEF(DRM_IOCTL_AGP_BIND, drm_agp_bind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
118 DRM_IOCTL_DEF(DRM_IOCTL_AGP_UNBIND, drm_agp_unbind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
119 #endif
120
121 DRM_IOCTL_DEF(DRM_IOCTL_SG_ALLOC, drm_sg_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
122 DRM_IOCTL_DEF(DRM_IOCTL_SG_FREE, drm_sg_free, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
123
124 DRM_IOCTL_DEF(DRM_IOCTL_WAIT_VBLANK, drm_wait_vblank, DRM_UNLOCKED),
125
126 DRM_IOCTL_DEF(DRM_IOCTL_MODESET_CTL, drm_modeset_ctl, 0),
127
128 DRM_IOCTL_DEF(DRM_IOCTL_UPDATE_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
129
130 DRM_IOCTL_DEF(DRM_IOCTL_GEM_CLOSE, drm_gem_close_ioctl, DRM_UNLOCKED),
131 DRM_IOCTL_DEF(DRM_IOCTL_GEM_FLINK, drm_gem_flink_ioctl, DRM_AUTH|DRM_UNLOCKED),
132 DRM_IOCTL_DEF(DRM_IOCTL_GEM_OPEN, drm_gem_open_ioctl, DRM_AUTH|DRM_UNLOCKED),
133
134 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETRESOURCES, drm_mode_getresources, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
135
136 #ifdef FREEBSD_NOTYET
137 DRM_IOCTL_DEF(DRM_IOCTL_PRIME_HANDLE_TO_FD, drm_prime_handle_to_fd_ioctl, DRM_AUTH|DRM_UNLOCKED),
138 DRM_IOCTL_DEF(DRM_IOCTL_PRIME_FD_TO_HANDLE, drm_prime_fd_to_handle_ioctl, DRM_AUTH|DRM_UNLOCKED),
139 #endif /* FREEBSD_NOTYET */
140
141 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANERESOURCES, drm_mode_getplane_res, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
142 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCRTC, drm_mode_getcrtc, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
143 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETCRTC, drm_mode_setcrtc, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
144 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANE, drm_mode_getplane, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
145 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPLANE, drm_mode_setplane, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
146 DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR, drm_mode_cursor_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
147 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETGAMMA, drm_mode_gamma_get_ioctl, DRM_UNLOCKED),
148 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETGAMMA, drm_mode_gamma_set_ioctl, DRM_MASTER|DRM_UNLOCKED),
149 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETENCODER, drm_mode_getencoder, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
150 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCONNECTOR, drm_mode_getconnector, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
151 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATTACHMODE, drm_mode_attachmode_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
152 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DETACHMODE, drm_mode_detachmode_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
153 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPERTY, drm_mode_getproperty_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
154 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPROPERTY, drm_mode_connector_property_set_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
155 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPBLOB, drm_mode_getblob_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
156 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETFB, drm_mode_getfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
157 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB, drm_mode_addfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
158 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB2, drm_mode_addfb2, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
159 DRM_IOCTL_DEF(DRM_IOCTL_MODE_RMFB, drm_mode_rmfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
160 DRM_IOCTL_DEF(DRM_IOCTL_MODE_PAGE_FLIP, drm_mode_page_flip_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
161 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DIRTYFB, drm_mode_dirtyfb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
162 DRM_IOCTL_DEF(DRM_IOCTL_MODE_CREATE_DUMB, drm_mode_create_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
163 DRM_IOCTL_DEF(DRM_IOCTL_MODE_MAP_DUMB, drm_mode_mmap_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
164 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DESTROY_DUMB, drm_mode_destroy_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
165 DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_GETPROPERTIES, drm_mode_obj_get_properties_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
166 DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_SETPROPERTY, drm_mode_obj_set_property_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
167 };
168
169 #ifdef COMPAT_FREEBSD32
170 extern struct drm_ioctl_desc drm_compat_ioctls[];
171 #endif
172
173 #define DRM_CORE_IOCTL_COUNT ARRAY_SIZE( drm_ioctls )
174
175 /**
176 * Take down the DRM device.
177 *
178 * \param dev DRM device structure.
179 *
180 * Frees every resource in \p dev.
181 *
182 * \sa drm_device
183 */
drm_lastclose(struct drm_device * dev)184 int drm_lastclose(struct drm_device * dev)
185 {
186 #ifdef __linux__
187 struct drm_vma_entry *vma, *vma_temp;
188 #endif
189
190 DRM_DEBUG("\n");
191
192 if (dev->driver->lastclose)
193 dev->driver->lastclose(dev);
194 DRM_DEBUG("driver lastclose completed\n");
195
196 if (dev->irq_enabled && !drm_core_check_feature(dev, DRIVER_MODESET))
197 drm_irq_uninstall(dev);
198
199 DRM_LOCK(dev);
200
201 /* Clear AGP information */
202 if (drm_core_has_AGP(dev) && dev->agp &&
203 !drm_core_check_feature(dev, DRIVER_MODESET)) {
204 struct drm_agp_mem *entry, *tempe;
205
206 /* Remove AGP resources, but leave dev->agp
207 intact until drv_cleanup is called. */
208 list_for_each_entry_safe(entry, tempe, &dev->agp->memory, head) {
209 if (entry->bound)
210 drm_unbind_agp(entry->memory);
211 drm_free_agp(entry->memory, entry->pages);
212 free(entry, DRM_MEM_AGPLISTS);
213 }
214 INIT_LIST_HEAD(&dev->agp->memory);
215
216 if (dev->agp->acquired)
217 drm_agp_release(dev);
218
219 dev->agp->acquired = 0;
220 dev->agp->enabled = 0;
221 }
222 if (drm_core_check_feature(dev, DRIVER_SG) && dev->sg &&
223 !drm_core_check_feature(dev, DRIVER_MODESET)) {
224 drm_sg_cleanup(dev->sg);
225 dev->sg = NULL;
226 }
227
228 #ifdef __linux__
229 /* Clear vma list (only built for debugging) */
230 list_for_each_entry_safe(vma, vma_temp, &dev->vmalist, head) {
231 list_del(&vma->head);
232 kfree(vma);
233 }
234 #endif
235
236 if (drm_core_check_feature(dev, DRIVER_HAVE_DMA) &&
237 !drm_core_check_feature(dev, DRIVER_MODESET))
238 drm_dma_takedown(dev);
239
240 DRM_UNLOCK(dev);
241
242 DRM_DEBUG("lastclose completed\n");
243 return 0;
244 }
245
246 #ifdef __linux__
247 /** File operations structure */
248 static const struct file_operations drm_stub_fops = {
249 .owner = THIS_MODULE,
250 .open = drm_stub_open,
251 .llseek = noop_llseek,
252 };
253 #endif
254
drm_core_init(void)255 static int __init drm_core_init(void)
256 {
257
258 sx_init(&drm_global_mutex, "drm_global_mutex");
259
260 drm_global_init();
261
262 #if DRM_LINUX
263 linux_ioctl_register_handler(&drm_handler);
264 #endif /* DRM_LINUX */
265
266 DRM_INFO("Initialized %s %d.%d.%d %s\n",
267 CORE_NAME, CORE_MAJOR, CORE_MINOR, CORE_PATCHLEVEL, CORE_DATE);
268 return 0;
269 }
270
drm_core_exit(void)271 static void __exit drm_core_exit(void)
272 {
273
274 #if DRM_LINUX
275 linux_ioctl_unregister_handler(&drm_handler);
276 #endif /* DRM_LINUX */
277
278 drm_global_release();
279
280 sx_destroy(&drm_global_mutex);
281 }
282
283 SYSINIT(drm_register, SI_SUB_KLD, SI_ORDER_MIDDLE,
284 drm_core_init, NULL);
285 SYSUNINIT(drm_unregister, SI_SUB_KLD, SI_ORDER_MIDDLE,
286 drm_core_exit, NULL);
287
288 /**
289 * Copy and IOCTL return string to user space
290 */
drm_copy_field(char * buf,size_t * buf_len,const char * value)291 static int drm_copy_field(char *buf, size_t *buf_len, const char *value)
292 {
293 int len;
294
295 /* don't overflow userbuf */
296 len = strlen(value);
297 if (len > *buf_len)
298 len = *buf_len;
299
300 /* let userspace know exact length of driver value (which could be
301 * larger than the userspace-supplied buffer) */
302 *buf_len = strlen(value);
303
304 /* finally, try filling in the userbuf */
305 if (len && buf)
306 if (copy_to_user(buf, value, len))
307 return -EFAULT;
308 return 0;
309 }
310
311 /**
312 * Get version information
313 *
314 * \param inode device inode.
315 * \param filp file pointer.
316 * \param cmd command.
317 * \param arg user argument, pointing to a drm_version structure.
318 * \return zero on success or negative number on failure.
319 *
320 * Fills in the version information in \p arg.
321 */
drm_version(struct drm_device * dev,void * data,struct drm_file * file_priv)322 int drm_version(struct drm_device *dev, void *data,
323 struct drm_file *file_priv)
324 {
325 struct drm_version *version = data;
326 int err;
327
328 version->version_major = dev->driver->major;
329 version->version_minor = dev->driver->minor;
330 version->version_patchlevel = dev->driver->patchlevel;
331 err = drm_copy_field(version->name, &version->name_len,
332 dev->driver->name);
333 if (!err)
334 err = drm_copy_field(version->date, &version->date_len,
335 dev->driver->date);
336 if (!err)
337 err = drm_copy_field(version->desc, &version->desc_len,
338 dev->driver->desc);
339
340 return err;
341 }
342
343 /**
344 * Called whenever a process performs an ioctl on /dev/drm.
345 *
346 * \param inode device inode.
347 * \param file_priv DRM file private.
348 * \param cmd command.
349 * \param arg user argument.
350 * \return zero on success or negative number on failure.
351 *
352 * Looks up the ioctl function in the ::ioctls table, checking for root
353 * previleges if so required, and dispatches to the respective function.
354 */
drm_ioctl(struct cdev * kdev,u_long cmd,caddr_t data,int flags,DRM_STRUCTPROC * p)355 int drm_ioctl(struct cdev *kdev, u_long cmd, caddr_t data, int flags,
356 DRM_STRUCTPROC *p)
357 {
358 struct drm_file *file_priv;
359 struct drm_device *dev;
360 struct drm_ioctl_desc *ioctl;
361 drm_ioctl_t *func;
362 unsigned int nr = DRM_IOCTL_NR(cmd);
363 int retcode;
364
365 dev = drm_get_device_from_kdev(kdev);
366
367 retcode = devfs_get_cdevpriv((void **)&file_priv);
368 if (retcode != 0) {
369 DRM_ERROR("can't find authenticator\n");
370 return EINVAL;
371 }
372
373 retcode = -EINVAL;
374
375 atomic_inc(&dev->ioctl_count);
376 atomic_inc(&dev->counts[_DRM_STAT_IOCTLS]);
377 ++file_priv->ioctl_count;
378
379 DRM_DEBUG("pid=%d, cmd=0x%02lx, nr=0x%02x, dev 0x%lx, auth=%d\n",
380 DRM_CURRENTPID, cmd, nr,
381 (long)file_priv->minor->device,
382 file_priv->authenticated);
383
384 switch (cmd) {
385 case FIONBIO:
386 case FIOASYNC:
387 atomic_dec(&dev->ioctl_count);
388 return 0;
389
390 case FIOSETOWN:
391 atomic_dec(&dev->ioctl_count);
392 return fsetown(*(int *)data, &file_priv->minor->buf_sigio);
393
394 case FIOGETOWN:
395 atomic_dec(&dev->ioctl_count);
396 *(int *) data = fgetown(&file_priv->minor->buf_sigio);
397 return 0;
398 }
399
400 if (IOCGROUP(cmd) != DRM_IOCTL_BASE) {
401 atomic_dec(&dev->ioctl_count);
402 DRM_DEBUG("Bad ioctl group 0x%x\n", (int)IOCGROUP(cmd));
403 return EINVAL;
404 }
405
406 if ((nr >= DRM_CORE_IOCTL_COUNT) &&
407 ((nr < DRM_COMMAND_BASE) || (nr >= DRM_COMMAND_END)))
408 goto err_i1;
409 #ifdef COMPAT_FREEBSD32
410 if (SV_CURPROC_FLAG(SV_ILP32) &&
411 (nr >= DRM_COMMAND_BASE) && (nr < DRM_COMMAND_END) &&
412 (nr < DRM_COMMAND_BASE + *dev->driver->num_compat_ioctls) &&
413 (dev->driver->compat_ioctls[nr - DRM_COMMAND_BASE].func != NULL)) {
414 ioctl = &dev->driver->compat_ioctls[nr - DRM_COMMAND_BASE];
415 } else
416 #endif
417 if ((nr >= DRM_COMMAND_BASE) && (nr < DRM_COMMAND_END) &&
418 (nr < DRM_COMMAND_BASE + dev->driver->num_ioctls)) {
419 ioctl = &dev->driver->ioctls[nr - DRM_COMMAND_BASE];
420 }
421 else if ((nr >= DRM_COMMAND_END) || (nr < DRM_COMMAND_BASE)) {
422 #ifdef COMPAT_FREEBSD32
423 /*
424 * Called whenever a 32-bit process running under a 64-bit
425 * kernel performs an ioctl on /dev/drm.
426 */
427 if (SV_CURPROC_FLAG(SV_ILP32) && drm_compat_ioctls[nr].func != NULL)
428 /*
429 * Assume that ioctls without an explicit compat
430 * routine will just work. This may not always be a
431 * good assumption, but it's better than always
432 * failing.
433 */
434 ioctl = &drm_compat_ioctls[nr];
435 else
436 #endif
437 ioctl = &drm_ioctls[nr];
438 } else
439 goto err_i1;
440
441 /* Do not trust userspace, use our own definition */
442 func = ioctl->func;
443 /* is there a local override? */
444 #ifdef FREEBSD_NOTYET
445 #ifdef COMPAT_FREEBSD32
446 if (SV_CURPROC_FLAG(SV_ILP32) &&
447 (nr == DRM_IOCTL_NR(DRM_IOCTL_DMA)) && dev->driver->dma_compat_ioctl)
448 func = dev->driver->dma_compat_ioctl;
449 else
450 #endif
451 #endif /* FREEBSD_NOTYET */
452 if ((nr == DRM_IOCTL_NR(DRM_IOCTL_DMA)) && dev->driver->dma_ioctl)
453 func = dev->driver->dma_ioctl;
454
455 if (!func) {
456 DRM_DEBUG("no function\n");
457 retcode = -EINVAL;
458 } else if (((ioctl->flags & DRM_ROOT_ONLY) && !DRM_SUSER(p)) ||
459 ((ioctl->flags & DRM_AUTH) && !file_priv->authenticated) ||
460 ((ioctl->flags & DRM_MASTER) && !file_priv->is_master) ||
461 (!(ioctl->flags & DRM_CONTROL_ALLOW) && (file_priv->minor->type == DRM_MINOR_CONTROL))) {
462 retcode = -EACCES;
463 } else {
464 if (ioctl->flags & DRM_UNLOCKED)
465 retcode = func(dev, data, file_priv);
466 else {
467 sx_xlock(&drm_global_mutex);
468 retcode = func(dev, data, file_priv);
469 sx_xunlock(&drm_global_mutex);
470 }
471 }
472
473 err_i1:
474 atomic_dec(&dev->ioctl_count);
475 if (retcode == -ERESTARTSYS) {
476 /*
477 * FIXME: Find where in i915 ERESTARTSYS should be
478 * converted to EINTR.
479 */
480 DRM_DEBUG("ret = %d -> %d\n", retcode, -EINTR);
481 retcode = -EINTR;
482 }
483 if (retcode)
484 DRM_DEBUG("ret = %d\n", retcode);
485 if (retcode != 0 &&
486 (drm_debug & DRM_DEBUGBITS_FAILED_IOCTL) != 0) {
487 printf(
488 "pid %d, cmd 0x%02lx, nr 0x%02x, dev 0x%lx, auth %d, res %d\n",
489 DRM_CURRENTPID, cmd, nr, (long)file_priv->minor->device,
490 file_priv->authenticated, -retcode);
491 }
492
493 return -retcode;
494 }
495 EXPORT_SYMBOL(drm_ioctl);
496
drm_getsarea(struct drm_device * dev)497 struct drm_local_map *drm_getsarea(struct drm_device *dev)
498 {
499 struct drm_map_list *entry;
500
501 list_for_each_entry(entry, &dev->maplist, head) {
502 if (entry->map && entry->map->type == _DRM_SHM &&
503 (entry->map->flags & _DRM_CONTAINS_LOCK)) {
504 return entry->map;
505 }
506 }
507 return NULL;
508 }
509 EXPORT_SYMBOL(drm_getsarea);
510