1 | /** |
2 | * \file drm_stub.h |
3 | * Stub support |
4 | * |
5 | * \author Rickard E. (Rik) Faith <faith@valinux.com> |
6 | */ |
7 | |
8 | /* |
9 | * Created: Fri Jan 19 10:48:35 2001 by faith@acm.org |
10 | * |
11 | * Copyright 2001 VA Linux Systems, Inc., Sunnyvale, California. |
12 | * All Rights Reserved. |
13 | * |
14 | * Permission is hereby granted, free of charge, to any person obtaining a |
15 | * copy of this software and associated documentation files (the "Software"), |
16 | * to deal in the Software without restriction, including without limitation |
17 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
18 | * and/or sell copies of the Software, and to permit persons to whom the |
19 | * Software is furnished to do so, subject to the following conditions: |
20 | * |
21 | * The above copyright notice and this permission notice (including the next |
22 | * paragraph) shall be included in all copies or substantial portions of the |
23 | * Software. |
24 | * |
25 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
26 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
27 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
28 | * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR |
29 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
30 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
31 | * DEALINGS IN THE SOFTWARE. |
32 | */ |
33 | |
34 | #include <linux/err.h> |
35 | #include <linux/export.h> |
36 | #include <linux/fs.h> |
37 | #include <linux/module.h> |
38 | #include <linux/moduleparam.h> |
39 | #include <linux/mount.h> |
40 | #include <linux/printk.h> |
41 | #include <linux/slab.h> |
42 | #include <drm/drmP.h> |
43 | #include <drm/drm_core.h> |
44 | |
45 | unsigned int drm_debug = 0; /* 1 to enable debug output */ |
46 | EXPORT_SYMBOL(drm_debug); |
47 | |
48 | unsigned int drm_rnodes = 0; /* 1 to enable experimental render nodes API */ |
49 | EXPORT_SYMBOL(drm_rnodes); |
50 | |
51 | /* 1 to allow user space to request universal planes (experimental) */ |
52 | unsigned int drm_universal_planes = 0; |
53 | EXPORT_SYMBOL(drm_universal_planes); |
54 | |
55 | unsigned int drm_vblank_offdelay = 5000; /* Default to 5000 msecs. */ |
56 | EXPORT_SYMBOL(drm_vblank_offdelay); |
57 | |
58 | unsigned int drm_timestamp_precision = 20; /* Default to 20 usecs. */ |
59 | EXPORT_SYMBOL(drm_timestamp_precision); |
60 | |
61 | /* |
62 | * Default to use monotonic timestamps for wait-for-vblank and page-flip |
63 | * complete events. |
64 | */ |
65 | unsigned int drm_timestamp_monotonic = 1; |
66 | |
67 | MODULE_AUTHOR(CORE_AUTHOR); |
68 | MODULE_DESCRIPTION(CORE_DESC); |
69 | MODULE_LICENSE("GPL and additional rights" ); |
70 | MODULE_PARM_DESC(debug, "Enable debug output" ); |
71 | MODULE_PARM_DESC(rnodes, "Enable experimental render nodes API" ); |
72 | MODULE_PARM_DESC(vblankoffdelay, "Delay until vblank irq auto-disable [msecs]" ); |
73 | MODULE_PARM_DESC(timestamp_precision_usec, "Max. error on timestamps [usecs]" ); |
74 | MODULE_PARM_DESC(timestamp_monotonic, "Use monotonic timestamps" ); |
75 | |
76 | module_param_named(debug, drm_debug, int, 0600); |
77 | module_param_named(rnodes, drm_rnodes, int, 0600); |
78 | module_param_named(universal_planes, drm_universal_planes, int, 0600); |
79 | module_param_named(vblankoffdelay, drm_vblank_offdelay, int, 0600); |
80 | module_param_named(timestamp_precision_usec, drm_timestamp_precision, int, 0600); |
81 | module_param_named(timestamp_monotonic, drm_timestamp_monotonic, int, 0600); |
82 | |
83 | #ifdef __NetBSD__ |
84 | spinlock_t drm_minor_lock; |
85 | #else |
86 | static DEFINE_SPINLOCK(drm_minor_lock); |
87 | #endif |
88 | struct idr drm_minors_idr; |
89 | |
90 | #ifndef __NetBSD__ |
91 | struct class *drm_class; |
92 | struct dentry *drm_debugfs_root; |
93 | #endif |
94 | |
95 | int drm_err(const char *func, const char *format, ...) |
96 | { |
97 | #ifdef __NetBSD__ |
98 | va_list args; |
99 | |
100 | va_start(args, format); |
101 | printf("DRM error in %s: " , func); |
102 | vprintf(format, args); |
103 | va_end(args); |
104 | |
105 | return 0; |
106 | #else |
107 | struct va_format vaf; |
108 | va_list args; |
109 | int r; |
110 | |
111 | va_start(args, format); |
112 | |
113 | vaf.fmt = format; |
114 | vaf.va = &args; |
115 | |
116 | r = printk(KERN_ERR "[" DRM_NAME ":%s] *ERROR* %pV" , func, &vaf); |
117 | |
118 | va_end(args); |
119 | |
120 | return r; |
121 | #endif |
122 | } |
123 | EXPORT_SYMBOL(drm_err); |
124 | |
125 | void drm_ut_debug_printk(const char *function_name, const char *format, ...) |
126 | { |
127 | #ifdef __NetBSD__ |
128 | va_list args; |
129 | |
130 | va_start(args, format); |
131 | printf("DRM debug in %s: " , function_name); |
132 | vprintf(format, args); |
133 | va_end(args); |
134 | #else |
135 | struct va_format vaf; |
136 | va_list args; |
137 | |
138 | va_start(args, format); |
139 | vaf.fmt = format; |
140 | vaf.va = &args; |
141 | |
142 | printk(KERN_DEBUG "[" DRM_NAME ":%s] %pV" , function_name, &vaf); |
143 | |
144 | va_end(args); |
145 | #endif |
146 | } |
147 | EXPORT_SYMBOL(drm_ut_debug_printk); |
148 | |
149 | struct drm_master *drm_master_create(struct drm_minor *minor) |
150 | { |
151 | struct drm_master *master; |
152 | |
153 | master = kzalloc(sizeof(*master), GFP_KERNEL); |
154 | if (!master) |
155 | return NULL; |
156 | |
157 | kref_init(&master->refcount); |
158 | spin_lock_init(&master->lock.spinlock); |
159 | #ifdef __NetBSD__ |
160 | DRM_INIT_WAITQUEUE(&master->lock.lock_queue, "drmlockq" ); |
161 | #else |
162 | init_waitqueue_head(&master->lock.lock_queue); |
163 | #endif |
164 | drm_ht_create(&master->magiclist, DRM_MAGIC_HASH_ORDER); |
165 | INIT_LIST_HEAD(&master->magicfree); |
166 | master->minor = minor; |
167 | |
168 | return master; |
169 | } |
170 | |
171 | struct drm_master *drm_master_get(struct drm_master *master) |
172 | { |
173 | kref_get(&master->refcount); |
174 | return master; |
175 | } |
176 | EXPORT_SYMBOL(drm_master_get); |
177 | |
178 | static void drm_master_destroy(struct kref *kref) |
179 | { |
180 | struct drm_master *master = container_of(kref, struct drm_master, refcount); |
181 | struct drm_magic_entry *pt, *next; |
182 | struct drm_device *dev = master->minor->dev; |
183 | struct drm_map_list *r_list, *list_temp; |
184 | |
185 | mutex_lock(&dev->struct_mutex); |
186 | if (dev->driver->master_destroy) |
187 | dev->driver->master_destroy(dev, master); |
188 | |
189 | list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) { |
190 | if (r_list->master == master) { |
191 | drm_rmmap_locked(dev, r_list->map); |
192 | r_list = NULL; |
193 | } |
194 | } |
195 | |
196 | if (master->unique) { |
197 | kfree(master->unique); |
198 | master->unique = NULL; |
199 | master->unique_len = 0; |
200 | } |
201 | |
202 | kfree(dev->devname); |
203 | dev->devname = NULL; |
204 | |
205 | list_for_each_entry_safe(pt, next, &master->magicfree, head) { |
206 | list_del(&pt->head); |
207 | drm_ht_remove_item(&master->magiclist, &pt->hash_item); |
208 | kfree(pt); |
209 | } |
210 | |
211 | drm_ht_remove(&master->magiclist); |
212 | |
213 | #ifdef __NetBSD__ |
214 | spin_lock_destroy(&master->lock.spinlock); |
215 | DRM_DESTROY_WAITQUEUE(&master->lock.lock_queue); |
216 | #endif |
217 | |
218 | mutex_unlock(&dev->struct_mutex); |
219 | kfree(master); |
220 | } |
221 | |
222 | void drm_master_put(struct drm_master **master) |
223 | { |
224 | kref_put(&(*master)->refcount, drm_master_destroy); |
225 | *master = NULL; |
226 | } |
227 | EXPORT_SYMBOL(drm_master_put); |
228 | |
229 | int drm_setmaster_ioctl(struct drm_device *dev, void *data, |
230 | struct drm_file *file_priv) |
231 | { |
232 | int ret = 0; |
233 | |
234 | mutex_lock(&dev->master_mutex); |
235 | if (file_priv->is_master) |
236 | goto out_unlock; |
237 | |
238 | if (file_priv->minor->master) { |
239 | ret = -EINVAL; |
240 | goto out_unlock; |
241 | } |
242 | |
243 | if (!file_priv->master) { |
244 | ret = -EINVAL; |
245 | goto out_unlock; |
246 | } |
247 | |
248 | file_priv->minor->master = drm_master_get(file_priv->master); |
249 | file_priv->is_master = 1; |
250 | if (dev->driver->master_set) { |
251 | ret = dev->driver->master_set(dev, file_priv, false); |
252 | if (unlikely(ret != 0)) { |
253 | file_priv->is_master = 0; |
254 | drm_master_put(&file_priv->minor->master); |
255 | } |
256 | } |
257 | |
258 | out_unlock: |
259 | mutex_unlock(&dev->master_mutex); |
260 | return ret; |
261 | } |
262 | |
263 | int drm_dropmaster_ioctl(struct drm_device *dev, void *data, |
264 | struct drm_file *file_priv) |
265 | { |
266 | int ret = -EINVAL; |
267 | |
268 | mutex_lock(&dev->master_mutex); |
269 | if (!file_priv->is_master) |
270 | goto out_unlock; |
271 | |
272 | if (!file_priv->minor->master) |
273 | goto out_unlock; |
274 | |
275 | ret = 0; |
276 | if (dev->driver->master_drop) |
277 | dev->driver->master_drop(dev, file_priv, false); |
278 | drm_master_put(&file_priv->minor->master); |
279 | file_priv->is_master = 0; |
280 | |
281 | out_unlock: |
282 | mutex_unlock(&dev->master_mutex); |
283 | return ret; |
284 | } |
285 | |
286 | /* |
287 | * DRM Minors |
288 | * A DRM device can provide several char-dev interfaces on the DRM-Major. Each |
289 | * of them is represented by a drm_minor object. Depending on the capabilities |
290 | * of the device-driver, different interfaces are registered. |
291 | * |
292 | * Minors can be accessed via dev->$minor_name. This pointer is either |
293 | * NULL or a valid drm_minor pointer and stays valid as long as the device is |
294 | * valid. This means, DRM minors have the same life-time as the underlying |
295 | * device. However, this doesn't mean that the minor is active. Minors are |
296 | * registered and unregistered dynamically according to device-state. |
297 | */ |
298 | |
299 | static struct drm_minor **drm_minor_get_slot(struct drm_device *dev, |
300 | unsigned int type) |
301 | { |
302 | switch (type) { |
303 | case DRM_MINOR_LEGACY: |
304 | return &dev->primary; |
305 | case DRM_MINOR_RENDER: |
306 | return &dev->render; |
307 | case DRM_MINOR_CONTROL: |
308 | return &dev->control; |
309 | default: |
310 | return NULL; |
311 | } |
312 | } |
313 | |
314 | static int drm_minor_alloc(struct drm_device *dev, unsigned int type) |
315 | { |
316 | struct drm_minor *minor; |
317 | |
318 | minor = kzalloc(sizeof(*minor), GFP_KERNEL); |
319 | if (!minor) |
320 | return -ENOMEM; |
321 | |
322 | minor->type = type; |
323 | minor->dev = dev; |
324 | |
325 | *drm_minor_get_slot(dev, type) = minor; |
326 | return 0; |
327 | } |
328 | |
329 | static void drm_minor_free(struct drm_device *dev, unsigned int type) |
330 | { |
331 | struct drm_minor **slot; |
332 | |
333 | slot = drm_minor_get_slot(dev, type); |
334 | if (*slot) { |
335 | kfree(*slot); |
336 | *slot = NULL; |
337 | } |
338 | } |
339 | |
340 | static int drm_minor_register(struct drm_device *dev, unsigned int type) |
341 | { |
342 | struct drm_minor *new_minor; |
343 | unsigned long flags; |
344 | #ifndef __NetBSD__ |
345 | int ret; |
346 | #endif |
347 | int minor_id; |
348 | |
349 | DRM_DEBUG("\n" ); |
350 | |
351 | new_minor = *drm_minor_get_slot(dev, type); |
352 | if (!new_minor) |
353 | return 0; |
354 | |
355 | idr_preload(GFP_KERNEL); |
356 | spin_lock_irqsave(&drm_minor_lock, flags); |
357 | minor_id = idr_alloc(&drm_minors_idr, |
358 | NULL, |
359 | 64 * type, |
360 | 64 * (type + 1), |
361 | GFP_NOWAIT); |
362 | spin_unlock_irqrestore(&drm_minor_lock, flags); |
363 | idr_preload_end(); |
364 | |
365 | if (minor_id < 0) |
366 | return minor_id; |
367 | |
368 | new_minor->index = minor_id; |
369 | |
370 | #ifndef __NetBSD__ |
371 | ret = drm_debugfs_init(new_minor, minor_id, drm_debugfs_root); |
372 | if (ret) { |
373 | DRM_ERROR("DRM: Failed to initialize /sys/kernel/debug/dri.\n" ); |
374 | goto err_id; |
375 | } |
376 | |
377 | ret = drm_sysfs_device_add(new_minor); |
378 | if (ret) { |
379 | DRM_ERROR("DRM: Error sysfs_device_add.\n" ); |
380 | goto err_debugfs; |
381 | } |
382 | #endif |
383 | /* replace NULL with @minor so lookups will succeed from now on */ |
384 | spin_lock_irqsave(&drm_minor_lock, flags); |
385 | idr_replace(&drm_minors_idr, new_minor, new_minor->index); |
386 | spin_unlock_irqrestore(&drm_minor_lock, flags); |
387 | |
388 | DRM_DEBUG("new minor assigned %d\n" , minor_id); |
389 | return 0; |
390 | |
391 | #ifndef __NetBSD__ |
392 | err_debugfs: |
393 | drm_debugfs_cleanup(new_minor); |
394 | err_id: |
395 | spin_lock_irqsave(&drm_minor_lock, flags); |
396 | idr_remove(&drm_minors_idr, minor_id); |
397 | spin_unlock_irqrestore(&drm_minor_lock, flags); |
398 | new_minor->index = 0; |
399 | return ret; |
400 | #endif |
401 | } |
402 | |
403 | static void drm_minor_unregister(struct drm_device *dev, unsigned int type) |
404 | { |
405 | struct drm_minor *minor; |
406 | unsigned long flags; |
407 | |
408 | minor = *drm_minor_get_slot(dev, type); |
409 | if (!minor || !minor->kdev) |
410 | return; |
411 | |
412 | spin_lock_irqsave(&drm_minor_lock, flags); |
413 | idr_remove(&drm_minors_idr, minor->index); |
414 | spin_unlock_irqrestore(&drm_minor_lock, flags); |
415 | minor->index = 0; |
416 | |
417 | drm_debugfs_cleanup(minor); |
418 | drm_sysfs_device_remove(minor); |
419 | } |
420 | |
421 | /** |
422 | * drm_minor_acquire - Acquire a DRM minor |
423 | * @minor_id: Minor ID of the DRM-minor |
424 | * |
425 | * Looks up the given minor-ID and returns the respective DRM-minor object. The |
426 | * refence-count of the underlying device is increased so you must release this |
427 | * object with drm_minor_release(). |
428 | * |
429 | * As long as you hold this minor, it is guaranteed that the object and the |
430 | * minor->dev pointer will stay valid! However, the device may get unplugged and |
431 | * unregistered while you hold the minor. |
432 | * |
433 | * Returns: |
434 | * Pointer to minor-object with increased device-refcount, or PTR_ERR on |
435 | * failure. |
436 | */ |
437 | struct drm_minor *drm_minor_acquire(unsigned int minor_id) |
438 | { |
439 | struct drm_minor *minor; |
440 | unsigned long flags; |
441 | |
442 | spin_lock_irqsave(&drm_minor_lock, flags); |
443 | minor = idr_find(&drm_minors_idr, minor_id); |
444 | if (minor) |
445 | drm_dev_ref(minor->dev); |
446 | spin_unlock_irqrestore(&drm_minor_lock, flags); |
447 | |
448 | if (!minor) { |
449 | return ERR_PTR(-ENODEV); |
450 | } else if (drm_device_is_unplugged(minor->dev)) { |
451 | drm_dev_unref(minor->dev); |
452 | return ERR_PTR(-ENODEV); |
453 | } |
454 | |
455 | return minor; |
456 | } |
457 | |
458 | /** |
459 | * drm_minor_release - Release DRM minor |
460 | * @minor: Pointer to DRM minor object |
461 | * |
462 | * Release a minor that was previously acquired via drm_minor_acquire(). |
463 | */ |
464 | void drm_minor_release(struct drm_minor *minor) |
465 | { |
466 | drm_dev_unref(minor->dev); |
467 | } |
468 | |
469 | /** |
470 | * Called via drm_exit() at module unload time or when pci device is |
471 | * unplugged. |
472 | * |
473 | * Cleans up all DRM device, calling drm_lastclose(). |
474 | * |
475 | */ |
476 | void drm_put_dev(struct drm_device *dev) |
477 | { |
478 | DRM_DEBUG("\n" ); |
479 | |
480 | if (!dev) { |
481 | DRM_ERROR("cleanup called no dev\n" ); |
482 | return; |
483 | } |
484 | |
485 | drm_dev_unregister(dev); |
486 | drm_dev_unref(dev); |
487 | } |
488 | EXPORT_SYMBOL(drm_put_dev); |
489 | |
490 | void drm_unplug_dev(struct drm_device *dev) |
491 | { |
492 | /* for a USB device */ |
493 | drm_minor_unregister(dev, DRM_MINOR_LEGACY); |
494 | drm_minor_unregister(dev, DRM_MINOR_RENDER); |
495 | drm_minor_unregister(dev, DRM_MINOR_CONTROL); |
496 | |
497 | mutex_lock(&drm_global_mutex); |
498 | drm_device_set_unplugged(dev); |
499 | |
500 | if (dev->open_count == 0) { |
501 | drm_put_dev(dev); |
502 | } |
503 | mutex_unlock(&drm_global_mutex); |
504 | } |
505 | EXPORT_SYMBOL(drm_unplug_dev); |
506 | |
507 | #ifdef __NetBSD__ |
508 | |
509 | struct inode; |
510 | |
511 | static struct inode * |
512 | drm_fs_inode_new(void) |
513 | { |
514 | return NULL; |
515 | } |
516 | |
517 | static void |
518 | drm_fs_inode_free(struct inode *inode) |
519 | { |
520 | KASSERT(inode == NULL); |
521 | } |
522 | |
523 | #else |
524 | |
525 | /* |
526 | * DRM internal mount |
527 | * We want to be able to allocate our own "struct address_space" to control |
528 | * memory-mappings in VRAM (or stolen RAM, ...). However, core MM does not allow |
529 | * stand-alone address_space objects, so we need an underlying inode. As there |
530 | * is no way to allocate an independent inode easily, we need a fake internal |
531 | * VFS mount-point. |
532 | * |
533 | * The drm_fs_inode_new() function allocates a new inode, drm_fs_inode_free() |
534 | * frees it again. You are allowed to use iget() and iput() to get references to |
535 | * the inode. But each drm_fs_inode_new() call must be paired with exactly one |
536 | * drm_fs_inode_free() call (which does not have to be the last iput()). |
537 | * We use drm_fs_inode_*() to manage our internal VFS mount-point and share it |
538 | * between multiple inode-users. You could, technically, call |
539 | * iget() + drm_fs_inode_free() directly after alloc and sometime later do an |
540 | * iput(), but this way you'd end up with a new vfsmount for each inode. |
541 | */ |
542 | |
543 | static int drm_fs_cnt; |
544 | static struct vfsmount *drm_fs_mnt; |
545 | |
546 | static const struct dentry_operations drm_fs_dops = { |
547 | .d_dname = simple_dname, |
548 | }; |
549 | |
550 | static const struct super_operations drm_fs_sops = { |
551 | .statfs = simple_statfs, |
552 | }; |
553 | |
554 | static struct dentry *drm_fs_mount(struct file_system_type *fs_type, int flags, |
555 | const char *dev_name, void *data) |
556 | { |
557 | return mount_pseudo(fs_type, |
558 | "drm:" , |
559 | &drm_fs_sops, |
560 | &drm_fs_dops, |
561 | 0x010203ff); |
562 | } |
563 | |
564 | static struct file_system_type drm_fs_type = { |
565 | .name = "drm" , |
566 | .owner = THIS_MODULE, |
567 | .mount = drm_fs_mount, |
568 | .kill_sb = kill_anon_super, |
569 | }; |
570 | |
571 | static struct inode *drm_fs_inode_new(void) |
572 | { |
573 | struct inode *inode; |
574 | int r; |
575 | |
576 | r = simple_pin_fs(&drm_fs_type, &drm_fs_mnt, &drm_fs_cnt); |
577 | if (r < 0) { |
578 | DRM_ERROR("Cannot mount pseudo fs: %d\n" , r); |
579 | return ERR_PTR(r); |
580 | } |
581 | |
582 | inode = alloc_anon_inode(drm_fs_mnt->mnt_sb); |
583 | if (IS_ERR(inode)) |
584 | simple_release_fs(&drm_fs_mnt, &drm_fs_cnt); |
585 | |
586 | return inode; |
587 | } |
588 | |
589 | static void drm_fs_inode_free(struct inode *inode) |
590 | { |
591 | if (inode) { |
592 | iput(inode); |
593 | simple_release_fs(&drm_fs_mnt, &drm_fs_cnt); |
594 | } |
595 | } |
596 | |
597 | #endif |
598 | |
599 | /** |
600 | * drm_dev_alloc - Allocate new drm device |
601 | * @driver: DRM driver to allocate device for |
602 | * @parent: Parent device object |
603 | * |
604 | * Allocate and initialize a new DRM device. No device registration is done. |
605 | * Call drm_dev_register() to advertice the device to user space and register it |
606 | * with other core subsystems. |
607 | * |
608 | * The initial ref-count of the object is 1. Use drm_dev_ref() and |
609 | * drm_dev_unref() to take and drop further ref-counts. |
610 | * |
611 | * RETURNS: |
612 | * Pointer to new DRM device, or NULL if out of memory. |
613 | */ |
614 | struct drm_device *drm_dev_alloc(struct drm_driver *driver, |
615 | struct device *parent) |
616 | { |
617 | struct drm_device *dev; |
618 | int ret; |
619 | |
620 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
621 | if (!dev) |
622 | return NULL; |
623 | |
624 | kref_init(&dev->ref); |
625 | dev->dev = parent; |
626 | dev->driver = driver; |
627 | |
628 | INIT_LIST_HEAD(&dev->filelist); |
629 | INIT_LIST_HEAD(&dev->ctxlist); |
630 | INIT_LIST_HEAD(&dev->vmalist); |
631 | INIT_LIST_HEAD(&dev->maplist); |
632 | INIT_LIST_HEAD(&dev->vblank_event_list); |
633 | |
634 | spin_lock_init(&dev->count_lock); |
635 | spin_lock_init(&dev->event_lock); |
636 | #ifdef __NetBSD__ |
637 | linux_mutex_init(&dev->struct_mutex); |
638 | linux_mutex_init(&dev->ctxlist_mutex); |
639 | linux_mutex_init(&dev->master_mutex); |
640 | #else |
641 | mutex_init(&dev->struct_mutex); |
642 | mutex_init(&dev->ctxlist_mutex); |
643 | mutex_init(&dev->master_mutex); |
644 | #endif |
645 | |
646 | dev->anon_inode = drm_fs_inode_new(); |
647 | if (IS_ERR(dev->anon_inode)) { |
648 | ret = PTR_ERR(dev->anon_inode); |
649 | DRM_ERROR("Cannot allocate anonymous inode: %d\n" , ret); |
650 | goto err_free; |
651 | } |
652 | |
653 | if (drm_core_check_feature(dev, DRIVER_MODESET)) { |
654 | ret = drm_minor_alloc(dev, DRM_MINOR_CONTROL); |
655 | if (ret) |
656 | goto err_minors; |
657 | } |
658 | |
659 | if (drm_core_check_feature(dev, DRIVER_RENDER) && drm_rnodes) { |
660 | ret = drm_minor_alloc(dev, DRM_MINOR_RENDER); |
661 | if (ret) |
662 | goto err_minors; |
663 | } |
664 | |
665 | ret = drm_minor_alloc(dev, DRM_MINOR_LEGACY); |
666 | if (ret) |
667 | goto err_minors; |
668 | |
669 | if (drm_ht_create(&dev->map_hash, 12)) |
670 | goto err_minors; |
671 | |
672 | ret = drm_ctxbitmap_init(dev); |
673 | if (ret) { |
674 | DRM_ERROR("Cannot allocate memory for context bitmap.\n" ); |
675 | goto err_ht; |
676 | } |
677 | |
678 | if (driver->driver_features & DRIVER_GEM) { |
679 | ret = drm_gem_init(dev); |
680 | if (ret) { |
681 | DRM_ERROR("Cannot initialize graphics execution manager (GEM)\n" ); |
682 | goto err_ctxbitmap; |
683 | } |
684 | } |
685 | |
686 | return dev; |
687 | |
688 | err_ctxbitmap: |
689 | drm_ctxbitmap_cleanup(dev); |
690 | err_ht: |
691 | drm_ht_remove(&dev->map_hash); |
692 | err_minors: |
693 | drm_minor_free(dev, DRM_MINOR_LEGACY); |
694 | drm_minor_free(dev, DRM_MINOR_RENDER); |
695 | drm_minor_free(dev, DRM_MINOR_CONTROL); |
696 | drm_fs_inode_free(dev->anon_inode); |
697 | err_free: |
698 | #ifdef __NetBSD__ |
699 | linux_mutex_destroy(&dev->struct_mutex); |
700 | linux_mutex_destroy(&dev->ctxlist_mutex); |
701 | linux_mutex_destroy(&dev->master_mutex); |
702 | spin_lock_destroy(&dev->event_lock); |
703 | spin_lock_destroy(&dev->count_lock); |
704 | #else |
705 | mutex_destroy(&dev->master_mutex); |
706 | #endif |
707 | kfree(dev); |
708 | return NULL; |
709 | } |
710 | EXPORT_SYMBOL(drm_dev_alloc); |
711 | |
712 | static void drm_dev_release(struct kref *ref) |
713 | { |
714 | struct drm_device *dev = container_of(ref, struct drm_device, ref); |
715 | |
716 | if (dev->driver->driver_features & DRIVER_GEM) |
717 | drm_gem_destroy(dev); |
718 | |
719 | drm_ctxbitmap_cleanup(dev); |
720 | drm_ht_remove(&dev->map_hash); |
721 | drm_fs_inode_free(dev->anon_inode); |
722 | |
723 | drm_minor_free(dev, DRM_MINOR_LEGACY); |
724 | drm_minor_free(dev, DRM_MINOR_RENDER); |
725 | drm_minor_free(dev, DRM_MINOR_CONTROL); |
726 | |
727 | kfree(dev->devname); |
728 | |
729 | #ifdef __NetBSD__ |
730 | linux_mutex_destroy(&dev->struct_mutex); |
731 | linux_mutex_destroy(&dev->ctxlist_mutex); |
732 | linux_mutex_destroy(&dev->master_mutex); |
733 | spin_lock_destroy(&dev->event_lock); |
734 | spin_lock_destroy(&dev->count_lock); |
735 | #else |
736 | mutex_destroy(&dev->master_mutex); |
737 | #endif |
738 | kfree(dev); |
739 | } |
740 | |
741 | /** |
742 | * drm_dev_ref - Take reference of a DRM device |
743 | * @dev: device to take reference of or NULL |
744 | * |
745 | * This increases the ref-count of @dev by one. You *must* already own a |
746 | * reference when calling this. Use drm_dev_unref() to drop this reference |
747 | * again. |
748 | * |
749 | * This function never fails. However, this function does not provide *any* |
750 | * guarantee whether the device is alive or running. It only provides a |
751 | * reference to the object and the memory associated with it. |
752 | */ |
753 | void drm_dev_ref(struct drm_device *dev) |
754 | { |
755 | if (dev) |
756 | kref_get(&dev->ref); |
757 | } |
758 | EXPORT_SYMBOL(drm_dev_ref); |
759 | |
760 | /** |
761 | * drm_dev_unref - Drop reference of a DRM device |
762 | * @dev: device to drop reference of or NULL |
763 | * |
764 | * This decreases the ref-count of @dev by one. The device is destroyed if the |
765 | * ref-count drops to zero. |
766 | */ |
767 | void drm_dev_unref(struct drm_device *dev) |
768 | { |
769 | if (dev) |
770 | kref_put(&dev->ref, drm_dev_release); |
771 | } |
772 | EXPORT_SYMBOL(drm_dev_unref); |
773 | |
774 | /** |
775 | * drm_dev_register - Register DRM device |
776 | * @dev: Device to register |
777 | * |
778 | * Register the DRM device @dev with the system, advertise device to user-space |
779 | * and start normal device operation. @dev must be allocated via drm_dev_alloc() |
780 | * previously. |
781 | * |
782 | * Never call this twice on any device! |
783 | * |
784 | * RETURNS: |
785 | * 0 on success, negative error code on failure. |
786 | */ |
787 | int drm_dev_register(struct drm_device *dev, unsigned long flags) |
788 | { |
789 | int ret; |
790 | |
791 | #ifndef __NetBSD__ |
792 | mutex_lock(&drm_global_mutex); |
793 | #endif |
794 | |
795 | ret = drm_minor_register(dev, DRM_MINOR_CONTROL); |
796 | if (ret) |
797 | goto err_minors; |
798 | |
799 | ret = drm_minor_register(dev, DRM_MINOR_RENDER); |
800 | if (ret) |
801 | goto err_minors; |
802 | |
803 | ret = drm_minor_register(dev, DRM_MINOR_LEGACY); |
804 | if (ret) |
805 | goto err_minors; |
806 | |
807 | if (dev->driver->load) { |
808 | ret = dev->driver->load(dev, flags); |
809 | if (ret) |
810 | goto err_minors; |
811 | } |
812 | |
813 | /* setup grouping for legacy outputs */ |
814 | if (drm_core_check_feature(dev, DRIVER_MODESET)) { |
815 | ret = drm_mode_group_init_legacy_group(dev, |
816 | &dev->primary->mode_group); |
817 | if (ret) |
818 | goto err_unload; |
819 | } |
820 | |
821 | ret = 0; |
822 | goto out_unlock; |
823 | |
824 | err_unload: |
825 | if (dev->driver->unload) |
826 | dev->driver->unload(dev); |
827 | err_minors: |
828 | drm_minor_unregister(dev, DRM_MINOR_LEGACY); |
829 | drm_minor_unregister(dev, DRM_MINOR_RENDER); |
830 | drm_minor_unregister(dev, DRM_MINOR_CONTROL); |
831 | out_unlock: |
832 | #ifndef __NetBSD__ |
833 | mutex_unlock(&drm_global_mutex); |
834 | #endif |
835 | return ret; |
836 | } |
837 | EXPORT_SYMBOL(drm_dev_register); |
838 | |
839 | /** |
840 | * drm_dev_unregister - Unregister DRM device |
841 | * @dev: Device to unregister |
842 | * |
843 | * Unregister the DRM device from the system. This does the reverse of |
844 | * drm_dev_register() but does not deallocate the device. The caller must call |
845 | * drm_dev_unref() to drop their final reference. |
846 | */ |
847 | void drm_dev_unregister(struct drm_device *dev) |
848 | { |
849 | struct drm_map_list *r_list, *list_temp; |
850 | |
851 | drm_lastclose(dev); |
852 | |
853 | if (dev->driver->unload) |
854 | dev->driver->unload(dev); |
855 | |
856 | #ifndef __NetBSD__ /* Moved to drm_pci. */ |
857 | if (dev->agp) |
858 | drm_pci_agp_destroy(dev); |
859 | #endif |
860 | |
861 | drm_vblank_cleanup(dev); |
862 | |
863 | list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) |
864 | drm_rmmap(dev, r_list->map); |
865 | |
866 | drm_minor_unregister(dev, DRM_MINOR_LEGACY); |
867 | drm_minor_unregister(dev, DRM_MINOR_RENDER); |
868 | drm_minor_unregister(dev, DRM_MINOR_CONTROL); |
869 | } |
870 | EXPORT_SYMBOL(drm_dev_unregister); |
871 | |