2 * Copyright (c) 2011 The FreeBSD Foundation
5 * This software was developed by Konstantin Belousov under sponsorship from
6 * the FreeBSD Foundation.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/limits.h>
39 #include <sys/mutex.h>
42 #include <vm/vm_page.h>
44 #include <dev/drm2/drmP.h>
45 #include <dev/drm2/drm.h>
46 #include <dev/drm2/drm_sarea.h>
49 * We make up offsets for buffer objects so we can recognize them at
53 /* pgoff in mmap is an unsigned long, so we need to make sure that
54 * the faked up offset will fit
57 #if BITS_PER_LONG == 64
58 #define DRM_FILE_PAGE_OFFSET_START ((0xFFFFFFFFUL >> PAGE_SHIFT) + 1)
59 #define DRM_FILE_PAGE_OFFSET_SIZE ((0xFFFFFFFFUL >> PAGE_SHIFT) * 16)
61 #define DRM_FILE_PAGE_OFFSET_START ((0xFFFFFFFUL >> PAGE_SHIFT) + 1)
62 #define DRM_FILE_PAGE_OFFSET_SIZE ((0xFFFFFFFUL >> PAGE_SHIFT) * 16)
66 * Initialize the GEM device fields
70 drm_gem_init(struct drm_device *dev)
72 struct drm_gem_mm *mm;
74 drm_gem_names_init(&dev->object_names);
76 mm = malloc(sizeof(*mm), DRM_MEM_DRIVER, M_NOWAIT);
78 DRM_ERROR("out of memory\n");
84 if (drm_ht_create(&mm->offset_hash, 19)) {
85 free(mm, DRM_MEM_DRIVER);
89 mm->idxunr = new_unrhdr(0, DRM_GEM_MAX_IDX, NULL);
95 drm_gem_destroy(struct drm_device *dev)
97 struct drm_gem_mm *mm = dev->mm_private;
99 dev->mm_private = NULL;
100 drm_ht_remove(&mm->offset_hash);
101 delete_unrhdr(mm->idxunr);
102 free(mm, DRM_MEM_DRIVER);
103 drm_gem_names_fini(&dev->object_names);
106 int drm_gem_object_init(struct drm_device *dev,
107 struct drm_gem_object *obj, size_t size)
109 KASSERT((size & (PAGE_SIZE - 1)) == 0,
110 ("Bad size %ju", (uintmax_t)size));
113 obj->vm_obj = vm_pager_allocate(OBJT_DEFAULT, NULL, size,
114 VM_PROT_READ | VM_PROT_WRITE, 0, curthread->td_ucred);
117 obj->handle_count = 0;
122 EXPORT_SYMBOL(drm_gem_object_init);
125 * Initialize an already allocated GEM object of the specified size with
126 * no GEM provided backing store. Instead the caller is responsible for
127 * backing the object and handling it.
129 int drm_gem_private_object_init(struct drm_device *dev,
130 struct drm_gem_object *obj, size_t size)
132 MPASS((size & (PAGE_SIZE - 1)) == 0);
138 atomic_store_rel_int(&obj->handle_count, 0);
143 EXPORT_SYMBOL(drm_gem_private_object_init);
145 struct drm_gem_object *
146 drm_gem_object_alloc(struct drm_device *dev, size_t size)
148 struct drm_gem_object *obj;
150 obj = malloc(sizeof(*obj), DRM_MEM_DRIVER, M_NOWAIT | M_ZERO);
154 if (drm_gem_object_init(dev, obj, size) != 0)
157 if (dev->driver->gem_init_object != NULL &&
158 dev->driver->gem_init_object(obj) != 0) {
163 vm_object_deallocate(obj->vm_obj);
165 free(obj, DRM_MEM_DRIVER);
168 EXPORT_SYMBOL(drm_gem_object_alloc);
170 #if defined(FREEBSD_NOTYET)
172 drm_gem_remove_prime_handles(struct drm_gem_object *obj, struct drm_file *filp)
174 if (obj->import_attach) {
175 drm_prime_remove_buf_handle(&filp->prime,
176 obj->import_attach->dmabuf);
178 if (obj->export_dma_buf) {
179 drm_prime_remove_buf_handle(&filp->prime,
180 obj->export_dma_buf);
186 * Removes the mapping from handle to filp for this object.
189 drm_gem_handle_delete(struct drm_file *filp, u32 handle)
191 struct drm_device *dev;
192 struct drm_gem_object *obj;
194 obj = drm_gem_names_remove(&filp->object_names, handle);
200 #if defined(FREEBSD_NOTYET)
201 drm_gem_remove_prime_handles(obj, filp);
204 if (dev->driver->gem_close_object)
205 dev->driver->gem_close_object(obj, filp);
206 drm_gem_object_handle_unreference_unlocked(obj);
210 EXPORT_SYMBOL(drm_gem_handle_delete);
213 * Create a handle for this object. This adds a handle reference
214 * to the object, which includes a regular reference count. Callers
215 * will likely want to dereference the object afterwards.
218 drm_gem_handle_create(struct drm_file *file_priv,
219 struct drm_gem_object *obj,
222 struct drm_device *dev = obj->dev;
226 ret = drm_gem_name_create(&file_priv->object_names, obj, handlep);
230 drm_gem_object_handle_reference(obj);
232 if (dev->driver->gem_open_object) {
233 ret = dev->driver->gem_open_object(obj, file_priv);
235 drm_gem_handle_delete(file_priv, *handlep);
242 EXPORT_SYMBOL(drm_gem_handle_create);
245 drm_gem_free_mmap_offset(struct drm_gem_object *obj)
247 struct drm_device *dev = obj->dev;
248 struct drm_gem_mm *mm = dev->mm_private;
249 struct drm_hash_item *list = &obj->map_list;
254 drm_ht_remove_item(&mm->offset_hash, list);
255 free_unr(mm->idxunr, list->key);
258 EXPORT_SYMBOL(drm_gem_free_mmap_offset);
261 drm_gem_create_mmap_offset(struct drm_gem_object *obj)
263 struct drm_device *dev = obj->dev;
264 struct drm_gem_mm *mm = dev->mm_private;
270 obj->map_list.key = alloc_unr(mm->idxunr);
271 ret = drm_ht_insert_item(&mm->offset_hash, &obj->map_list);
273 DRM_ERROR("failed to add to map hash\n");
274 free_unr(mm->idxunr, obj->map_list.key);
281 EXPORT_SYMBOL(drm_gem_create_mmap_offset);
283 /** Returns a reference to the object named by the handle. */
284 struct drm_gem_object *
285 drm_gem_object_lookup(struct drm_device *dev, struct drm_file *filp,
288 struct drm_gem_object *obj;
290 obj = drm_gem_name_ref(&filp->object_names, handle,
291 (void (*)(void *))drm_gem_object_reference);
295 EXPORT_SYMBOL(drm_gem_object_lookup);
298 drm_gem_close_ioctl(struct drm_device *dev, void *data,
299 struct drm_file *file_priv)
301 struct drm_gem_close *args = data;
304 if (!(dev->driver->driver_features & DRIVER_GEM))
307 ret = drm_gem_handle_delete(file_priv, args->handle);
313 drm_gem_flink_ioctl(struct drm_device *dev, void *data,
314 struct drm_file *file_priv)
316 struct drm_gem_flink *args = data;
317 struct drm_gem_object *obj;
320 if (!(dev->driver->driver_features & DRIVER_GEM))
323 obj = drm_gem_object_lookup(dev, file_priv, args->handle);
327 ret = drm_gem_name_create(&dev->object_names, obj, &obj->name);
329 if (ret == -EALREADY)
331 drm_gem_object_unreference_unlocked(obj);
334 args->name = obj->name;
339 drm_gem_open_ioctl(struct drm_device *dev, void *data,
340 struct drm_file *file_priv)
342 struct drm_gem_open *args = data;
343 struct drm_gem_object *obj;
347 if (!(dev->driver->driver_features & DRIVER_GEM))
350 obj = drm_gem_name_ref(&dev->object_names, args->name,
351 (void (*)(void *))drm_gem_object_reference);
355 ret = drm_gem_handle_create(file_priv, obj, &handle);
356 drm_gem_object_unreference_unlocked(obj);
360 args->handle = handle;
361 args->size = obj->size;
367 drm_gem_open(struct drm_device *dev, struct drm_file *file_private)
370 drm_gem_names_init(&file_private->object_names);
374 drm_gem_object_release_handle(uint32_t name, void *ptr, void *data)
376 struct drm_file *file_priv = data;
377 struct drm_gem_object *obj = ptr;
378 struct drm_device *dev = obj->dev;
380 #if defined(FREEBSD_NOTYET)
381 drm_gem_remove_prime_handles(obj, file_priv);
384 if (dev->driver->gem_close_object)
385 dev->driver->gem_close_object(obj, file_priv);
387 drm_gem_object_handle_unreference_unlocked(obj);
393 drm_gem_release(struct drm_device *dev, struct drm_file *file_private)
395 drm_gem_names_foreach(&file_private->object_names,
396 drm_gem_object_release_handle, file_private);
398 drm_gem_names_fini(&file_private->object_names);
402 drm_gem_object_release(struct drm_gem_object *obj)
406 * obj->vm_obj can be NULL for private gem objects.
408 vm_object_deallocate(obj->vm_obj);
410 EXPORT_SYMBOL(drm_gem_object_release);
413 drm_gem_object_free(struct drm_gem_object *obj)
415 struct drm_device *dev = obj->dev;
417 DRM_LOCK_ASSERT(dev);
418 if (dev->driver->gem_free_object != NULL)
419 dev->driver->gem_free_object(obj);
421 EXPORT_SYMBOL(drm_gem_object_free);
423 void drm_gem_object_handle_free(struct drm_gem_object *obj)
425 struct drm_device *dev = obj->dev;
426 struct drm_gem_object *obj1;
429 obj1 = drm_gem_names_remove(&dev->object_names, obj->name);
431 drm_gem_object_unreference(obj1);
435 static struct drm_gem_object *
436 drm_gem_object_from_offset(struct drm_device *dev, vm_ooffset_t offset)
438 struct drm_gem_object *obj;
439 struct drm_gem_mm *mm;
440 struct drm_hash_item *map_list;
442 if ((offset & DRM_GEM_MAPPING_MASK) != DRM_GEM_MAPPING_KEY)
444 offset &= ~DRM_GEM_MAPPING_KEY;
445 mm = dev->mm_private;
446 if (drm_ht_find_item(&mm->offset_hash, DRM_GEM_MAPPING_IDX(offset),
448 DRM_DEBUG("drm_gem_object_from_offset: offset 0x%jx obj not found\n",
452 obj = __containerof(map_list, struct drm_gem_object, map_list);
457 drm_gem_mmap_single(struct drm_device *dev, vm_ooffset_t *offset, vm_size_t size,
458 struct vm_object **obj_res, int nprot)
460 struct drm_gem_object *gem_obj;
461 struct vm_object *vm_obj;
464 gem_obj = drm_gem_object_from_offset(dev, *offset);
465 if (gem_obj == NULL) {
469 drm_gem_object_reference(gem_obj);
471 vm_obj = cdev_pager_allocate(gem_obj, OBJT_MGTDEVICE,
472 dev->driver->gem_pager_ops, size, nprot,
473 DRM_GEM_MAPPING_MAPOFF(*offset), curthread->td_ucred);
474 if (vm_obj == NULL) {
475 drm_gem_object_unreference_unlocked(gem_obj);
478 *offset = DRM_GEM_MAPPING_MAPOFF(*offset);
484 drm_gem_pager_dtr(void *handle)
486 struct drm_gem_object *obj;
487 struct drm_device *dev;
493 drm_gem_free_mmap_offset(obj);
494 drm_gem_object_unreference(obj);