vbox_ttm.c@ 85800

Last change on this file since 85800 was 85707, checked in by vboxsync, 4 years ago
Add/linux/vboxvideo: Cleanups.
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 15.1 KB

Line
1	/* $Id: vbox_ttm.c 85707 2020-08-11 19:43:16Z vboxsync $ */
2	/** @file
3	* VirtualBox Additions Linux kernel video driver
4	*/
5
6	/*
7	* Copyright (C) 2013-2020 Oracle Corporation
8	* This file is based on ast_ttm.c
9	* Copyright 2012 Red Hat Inc.
10	*
11	* Permission is hereby granted, free of charge, to any person obtaining a
12	* copy of this software and associated documentation files (the
13	* "Software"), to deal in the Software without restriction, including
14	* without limitation the rights to use, copy, modify, merge, publish,
15	* distribute, sub license, and/or sell copies of the Software, and to
16	* permit persons to whom the Software is furnished to do so, subject to
17	* the following conditions:
18	*
19	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21	* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
22	* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
23	* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
24	* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
25	* USE OR OTHER DEALINGS IN THE SOFTWARE.
26	*
27	* The above copyright notice and this permission notice (including the
28	* next paragraph) shall be included in all copies or substantial portions
29	* of the Software.
30	*
31	*
32	* Authors: Dave Airlie <[email protected]>
33	* Michael Thayer <[email protected]>
34	*/
35	#include "vbox_drv.h"
36	#include <drm/ttm/ttm_page_alloc.h>
37
38	#if RTLNX_VER_MAX(3,18,0) && !RTLNX_RHEL_MAJ_PREREQ(7,2)
39	#define PLACEMENT_FLAGS(placement) (placement)
40	#else
41	#define PLACEMENT_FLAGS(placement) ((placement).flags)
42	#endif
43
44	static inline struct vbox_private vbox_bdev(struct ttm_bo_device bd)
45	{
46	return container_of(bd, struct vbox_private, ttm.bdev);
47	}
48
49	#if RTLNX_VER_MAX(5,0,0) && !RTLNX_RHEL_MAJ_PREREQ(7,7) && !RTLNX_RHEL_MAJ_PREREQ(8,1)
50	static int vbox_ttm_mem_global_init(struct drm_global_reference *ref)
51	{
52	return ttm_mem_global_init(ref->object);
53	}
54
55	static void vbox_ttm_mem_global_release(struct drm_global_reference *ref)
56	{
57	ttm_mem_global_release(ref->object);
58	}
59
60	/**
61	* Adds the vbox memory manager object/structures to the global memory manager.
62	*/
63	static int vbox_ttm_global_init(struct vbox_private *vbox)
64	{
65	struct drm_global_reference *global_ref;
66	int ret;
67
68	#if RTLNX_VER_MAX(5,0,0)
69	global_ref = &vbox->ttm.mem_global_ref;
70	global_ref->global_type = DRM_GLOBAL_TTM_MEM;
71	global_ref->size = sizeof(struct ttm_mem_global);
72	global_ref->init = &vbox_ttm_mem_global_init;
73	global_ref->release = &vbox_ttm_mem_global_release;
74	ret = drm_global_item_ref(global_ref);
75	if (ret) {
76	DRM_ERROR("Failed setting up TTM memory subsystem.\n");
77	return ret;
78	}
79
80	vbox->ttm.bo_global_ref.mem_glob = vbox->ttm.mem_global_ref.object;
81	#endif
82	global_ref = &vbox->ttm.bo_global_ref.ref;
83	global_ref->global_type = DRM_GLOBAL_TTM_BO;
84	global_ref->size = sizeof(struct ttm_bo_global);
85	global_ref->init = &ttm_bo_global_init;
86	global_ref->release = &ttm_bo_global_release;
87
88	ret = drm_global_item_ref(global_ref);
89	if (ret) {
90	DRM_ERROR("Failed setting up TTM BO subsystem.\n");
91	#if RTLNX_VER_MAX(5,0,0)
92	drm_global_item_unref(&vbox->ttm.mem_global_ref);
93	#endif
94	return ret;
95	}
96
97	return 0;
98	}
99
100	/**
101	* Removes the vbox memory manager object from the global memory manager.
102	*/
103	static void vbox_ttm_global_release(struct vbox_private *vbox)
104	{
105	drm_global_item_unref(&vbox->ttm.bo_global_ref.ref);
106	drm_global_item_unref(&vbox->ttm.mem_global_ref);
107	}
108	#endif
109
110	static void vbox_bo_ttm_destroy(struct ttm_buffer_object *tbo)
111	{
112	struct vbox_bo *bo;
113
114	bo = container_of(tbo, struct vbox_bo, bo);
115
116	drm_gem_object_release(&bo->gem);
117	kfree(bo);
118	}
119
120	static bool vbox_ttm_bo_is_vbox_bo(struct ttm_buffer_object *bo)
121	{
122	if (bo->destroy == &vbox_bo_ttm_destroy)
123	return true;
124
125	return false;
126	}
127
128	static int
129	vbox_bo_init_mem_type(struct ttm_bo_device *bdev, u32 type,
130	struct ttm_mem_type_manager *man)
131	{
132	switch (type) {
133	case TTM_PL_SYSTEM:
134	man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
135	man->available_caching = TTM_PL_MASK_CACHING;
136	man->default_caching = TTM_PL_FLAG_CACHED;
137	break;
138	case TTM_PL_VRAM:
139	man->func = &ttm_bo_manager_func;
140	man->flags = TTM_MEMTYPE_FLAG_FIXED \| TTM_MEMTYPE_FLAG_MAPPABLE;
141	man->available_caching = TTM_PL_FLAG_UNCACHED \| TTM_PL_FLAG_WC;
142	man->default_caching = TTM_PL_FLAG_WC;
143	break;
144	default:
145	DRM_ERROR("Unsupported memory type %u\n", (unsigned int)type);
146	return -EINVAL;
147	}
148
149	return 0;
150	}
151
152	static void
153	vbox_bo_evict_flags(struct ttm_buffer_object bo, struct ttm_placement pl)
154	{
155	struct vbox_bo *vboxbo = vbox_bo(bo);
156
157	if (!vbox_ttm_bo_is_vbox_bo(bo))
158	return;
159
160	vbox_ttm_placement(vboxbo, TTM_PL_FLAG_SYSTEM);
161	*pl = vboxbo->placement;
162	}
163
164	static int vbox_bo_verify_access(struct ttm_buffer_object *bo,
165	struct file *filp)
166	{
167	return 0;
168	}
169
170	static int vbox_ttm_io_mem_reserve(struct ttm_bo_device *bdev,
171	struct ttm_mem_reg *mem)
172	{
173	struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
174	struct vbox_private *vbox = vbox_bdev(bdev);
175
176	mem->bus.addr = NULL;
177	mem->bus.offset = 0;
178	mem->bus.size = mem->num_pages << PAGE_SHIFT;
179	mem->bus.base = 0;
180	mem->bus.is_iomem = false;
181	if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
182	return -EINVAL;
183	switch (mem->mem_type) {
184	case TTM_PL_SYSTEM:
185	/* system memory */
186	return 0;
187	case TTM_PL_VRAM:
188	mem->bus.offset = mem->start << PAGE_SHIFT;
189	mem->bus.base = pci_resource_start(vbox->dev->pdev, 0);
190	mem->bus.is_iomem = true;
191	break;
192	default:
193	return -EINVAL;
194	}
195	return 0;
196	}
197
198	static void vbox_ttm_io_mem_free(struct ttm_bo_device *bdev,
199	struct ttm_mem_reg *mem)
200	{
201	}
202
203	static void vbox_ttm_backend_destroy(struct ttm_tt *tt)
204	{
205	ttm_tt_fini(tt);
206	kfree(tt);
207	}
208
209	static struct ttm_backend_func vbox_tt_backend_func = {
210	.destroy = &vbox_ttm_backend_destroy,
211	};
212
213	#if RTLNX_VER_MAX(4,17,0) && !RTLNX_RHEL_MAJ_PREREQ(7,6) && !RTLNX_SUSE_MAJ_PREREQ(15,1) && !RTLNX_SUSE_MAJ_PREREQ(12,5)
214	static struct ttm_tt vbox_ttm_tt_create(struct ttm_bo_device bdev,
215	unsigned long size,
216	u32 page_flags,
217	struct page *dummy_read_page)
218	#else
219	static struct ttm_tt vbox_ttm_tt_create(struct ttm_buffer_object bo,
220	u32 page_flags)
221	#endif
222	{
223	struct ttm_tt *tt;
224
225	tt = kzalloc(sizeof(*tt), GFP_KERNEL);
226	if (!tt)
227	return NULL;
228
229	tt->func = &vbox_tt_backend_func;
230	#if RTLNX_VER_MAX(4,17,0) && !RTLNX_RHEL_MAJ_PREREQ(7,6) && !RTLNX_SUSE_MAJ_PREREQ(15,1) && !RTLNX_SUSE_MAJ_PREREQ(12,5)
231	if (ttm_tt_init(tt, bdev, size, page_flags, dummy_read_page)) {
232	#else
233	if (ttm_tt_init(tt, bo, page_flags)) {
234	#endif
235	kfree(tt);
236	return NULL;
237	}
238
239	return tt;
240	}
241
242	#if RTLNX_VER_MAX(4,17,0)
243	# if RTLNX_VER_MAX(4,16,0) && !RTLNX_RHEL_MAJ_PREREQ(7,6) && !RTLNX_SUSE_MAJ_PREREQ(15,1) && !RTLNX_SUSE_MAJ_PREREQ(12,5)
244	static int vbox_ttm_tt_populate(struct ttm_tt *ttm)
245	{
246	return ttm_pool_populate(ttm);
247	}
248	# else
249	static int vbox_ttm_tt_populate(struct ttm_tt *ttm,
250	struct ttm_operation_ctx *ctx)
251	{
252	return ttm_pool_populate(ttm, ctx);
253	}
254	# endif
255
256	static void vbox_ttm_tt_unpopulate(struct ttm_tt *ttm)
257	{
258	ttm_pool_unpopulate(ttm);
259	}
260	#endif
261
262	static struct ttm_bo_driver vbox_bo_driver = {
263	.ttm_tt_create = vbox_ttm_tt_create,
264	#if RTLNX_VER_MAX(4,17,0)
265	.ttm_tt_populate = vbox_ttm_tt_populate,
266	.ttm_tt_unpopulate = vbox_ttm_tt_unpopulate,
267	#endif
268	.init_mem_type = vbox_bo_init_mem_type,
269	#if RTLNX_VER_MIN(4,10,0) \|\| RTLNX_RHEL_MAJ_PREREQ(7,4)
270	.eviction_valuable = ttm_bo_eviction_valuable,
271	#endif
272	.evict_flags = vbox_bo_evict_flags,
273	.verify_access = vbox_bo_verify_access,
274	.io_mem_reserve = &vbox_ttm_io_mem_reserve,
275	.io_mem_free = &vbox_ttm_io_mem_free,
276	#if RTLNX_VER_MIN(4,12,0) \|\| RTLNX_RHEL_MAJ_PREREQ(7,5)
277	# if RTLNX_VER_MAX(4,16,0) && !RTLNX_RHEL_MAJ_PREREQ(7,6) && !RTLNX_SUSE_MAJ_PREREQ(15,1) && !RTLNX_SUSE_MAJ_PREREQ(12,5)
278	.io_mem_pfn = ttm_bo_default_io_mem_pfn,
279	# endif
280	#endif
281	#if (RTLNX_VER_RANGE(4,7,0, 4,11,0) \|\| RTLNX_RHEL_MAJ_PREREQ(7,4)) && !RTLNX_RHEL_MAJ_PREREQ(7,5)
282	.lru_tail = &ttm_bo_default_lru_tail,
283	.swap_lru_tail = &ttm_bo_default_swap_lru_tail,
284	#endif
285	};
286
287	int vbox_mm_init(struct vbox_private *vbox)
288	{
289	int ret;
290	struct drm_device *dev = vbox->dev;
291	struct ttm_bo_device *bdev = &vbox->ttm.bdev;
292
293	#if RTLNX_VER_MAX(5,0,0) && !RTLNX_RHEL_MAJ_PREREQ(7,7) && !RTLNX_RHEL_MAJ_PREREQ(8,1)
294	ret = vbox_ttm_global_init(vbox);
295	if (ret)
296	return ret;
297	#endif
298	ret = ttm_bo_device_init(&vbox->ttm.bdev,
299	#if RTLNX_VER_MAX(5,0,0) && !RTLNX_RHEL_MAJ_PREREQ(7,7) && !RTLNX_RHEL_MAJ_PREREQ(8,1)
300	vbox->ttm.bo_global_ref.ref.object,
301	#endif
302	&vbox_bo_driver,
303	#if RTLNX_VER_MIN(3,15,0) \|\| RTLNX_RHEL_MAJ_PREREQ(7,1)
304	dev->anon_inode->i_mapping,
305	#endif
306	#if RTLNX_VER_MIN(5,5,0)
307	dev->vma_offset_manager,
308	#elif RTLNX_VER_MAX(5,2,0) && !RTLNX_RHEL_MAJ_PREREQ(8,2)
309	DRM_FILE_PAGE_OFFSET,
310	#endif
311	true);
312	if (ret) {
313	DRM_ERROR("Error initialising bo driver; %d\n", ret);
314	#if RTLNX_VER_MAX(5,0,0) && !RTLNX_RHEL_MAJ_PREREQ(7,7) && !RTLNX_RHEL_MAJ_PREREQ(8,1)
315	goto err_ttm_global_release;
316	#else
317	return ret;
318	#endif
319	}
320
321	ret = ttm_bo_init_mm(bdev, TTM_PL_VRAM,
322	vbox->available_vram_size >> PAGE_SHIFT);
323	if (ret) {
324	DRM_ERROR("Failed ttm VRAM init: %d\n", ret);
325	goto err_device_release;
326	}
327
328	#ifdef DRM_MTRR_WC
329	vbox->fb_mtrr = drm_mtrr_add(pci_resource_start(dev->pdev, 0),
330	pci_resource_len(dev->pdev, 0),
331	DRM_MTRR_WC);
332	#else
333	vbox->fb_mtrr = arch_phys_wc_add(pci_resource_start(dev->pdev, 0),
334	pci_resource_len(dev->pdev, 0));
335	#endif
336	return 0;
337
338	err_device_release:
339	ttm_bo_device_release(&vbox->ttm.bdev);
340	#if RTLNX_VER_MAX(5,0,0) && !RTLNX_RHEL_MAJ_PREREQ(7,7) && !RTLNX_RHEL_MAJ_PREREQ(8,1)
341	err_ttm_global_release:
342	vbox_ttm_global_release(vbox);
343	#endif
344	return ret;
345	}
346
347	void vbox_mm_fini(struct vbox_private *vbox)
348	{
349	#ifdef DRM_MTRR_WC
350	drm_mtrr_del(vbox->fb_mtrr,
351	pci_resource_start(vbox->dev->pdev, 0),
352	pci_resource_len(vbox->dev->pdev, 0), DRM_MTRR_WC);
353	#else
354	arch_phys_wc_del(vbox->fb_mtrr);
355	#endif
356	ttm_bo_device_release(&vbox->ttm.bdev);
357	#if RTLNX_VER_MAX(5,0,0) && !RTLNX_RHEL_MAJ_PREREQ(7,7) && !RTLNX_RHEL_MAJ_PREREQ(8,1)
358	vbox_ttm_global_release(vbox);
359	#endif
360	}
361
362	void vbox_ttm_placement(struct vbox_bo *bo, int domain)
363	{
364	u32 c = 0;
365	#if RTLNX_VER_MAX(3,18,0) && !RTLNX_RHEL_MAJ_PREREQ(7,2)
366	bo->placement.fpfn = 0;
367	bo->placement.lpfn = 0;
368	#else
369	unsigned int i;
370	#endif
371
372	bo->placement.placement = bo->placements;
373	bo->placement.busy_placement = bo->placements;
374
375	if (domain & TTM_PL_FLAG_VRAM)
376	PLACEMENT_FLAGS(bo->placements[c++]) =
377	TTM_PL_FLAG_WC \| TTM_PL_FLAG_UNCACHED \| TTM_PL_FLAG_VRAM;
378	if (domain & TTM_PL_FLAG_SYSTEM)
379	PLACEMENT_FLAGS(bo->placements[c++]) =
380	TTM_PL_MASK_CACHING \| TTM_PL_FLAG_SYSTEM;
381	if (!c)
382	PLACEMENT_FLAGS(bo->placements[c++]) =
383	TTM_PL_MASK_CACHING \| TTM_PL_FLAG_SYSTEM;
384
385	bo->placement.num_placement = c;
386	bo->placement.num_busy_placement = c;
387
388	#if RTLNX_VER_MIN(3,18,0) \|\| RTLNX_RHEL_MAJ_PREREQ(7,2)
389	for (i = 0; i < c; ++i) {
390	bo->placements[i].fpfn = 0;
391	bo->placements[i].lpfn = 0;
392	}
393	#endif
394	}
395
396	int vbox_bo_create(struct drm_device *dev, int size, int align,
397	u32 flags, struct vbox_bo **pvboxbo)
398	{
399	struct vbox_private *vbox = dev->dev_private;
400	struct vbox_bo *vboxbo;
401	size_t acc_size;
402	int ret;
403
404	vboxbo = kzalloc(sizeof(*vboxbo), GFP_KERNEL);
405	if (!vboxbo)
406	return -ENOMEM;
407
408	ret = drm_gem_object_init(dev, &vboxbo->gem, size);
409	if (ret)
410	goto err_free_vboxbo;
411
412	vboxbo->bo.bdev = &vbox->ttm.bdev;
413	#if RTLNX_VER_MAX(3,15,0) && !RTLNX_RHEL_MAJ_PREREQ(7,1)
414	vboxbo->bo.bdev->dev_mapping = dev->dev_mapping;
415	#endif
416
417	vbox_ttm_placement(vboxbo, TTM_PL_FLAG_VRAM \| TTM_PL_FLAG_SYSTEM);
418
419	acc_size = ttm_bo_dma_acc_size(&vbox->ttm.bdev, size,
420	sizeof(struct vbox_bo));
421
422	ret = ttm_bo_init(&vbox->ttm.bdev, &vboxbo->bo, size,
423	ttm_bo_type_device, &vboxbo->placement,
424	#if RTLNX_VER_MAX(4,17,0) && !RTLNX_RHEL_MAJ_PREREQ(7,6) && !RTLNX_SUSE_MAJ_PREREQ(15,1) && !RTLNX_SUSE_MAJ_PREREQ(12,5)
425	align >> PAGE_SHIFT, false, NULL, acc_size,
426	#else
427	align >> PAGE_SHIFT, false, acc_size,
428	#endif
429	#if RTLNX_VER_MIN(3,18,0) \|\| RTLNX_RHEL_MAJ_PREREQ(7,2)
430	NULL, NULL, vbox_bo_ttm_destroy);
431	#else
432	NULL, vbox_bo_ttm_destroy);
433	#endif
434	if (ret)
435	goto err_free_vboxbo;
436
437	*pvboxbo = vboxbo;
438
439	return 0;
440
441	err_free_vboxbo:
442	kfree(vboxbo);
443	return ret;
444	}
445
446	static inline u64 vbox_bo_gpu_offset(struct vbox_bo *bo)
447	{
448	return bo->bo.offset;
449	}
450
451	int vbox_bo_pin(struct vbox_bo bo, u32 pl_flag, u64 gpu_addr)
452	{
453	#if RTLNX_VER_MIN(4,16,0) \|\| RTLNX_RHEL_MAJ_PREREQ(7,6) \|\| RTLNX_SUSE_MAJ_PREREQ(15,1) \|\| RTLNX_SUSE_MAJ_PREREQ(12,5)
454	struct ttm_operation_ctx ctx = { false, false };
455	#endif
456	int i, ret;
457
458	if (bo->pin_count) {
459	bo->pin_count++;
460	if (gpu_addr)
461	*gpu_addr = vbox_bo_gpu_offset(bo);
462
463	return 0;
464	}
465
466	vbox_ttm_placement(bo, pl_flag);
467
468	for (i = 0; i < bo->placement.num_placement; i++)
469	PLACEMENT_FLAGS(bo->placements[i]) \|= TTM_PL_FLAG_NO_EVICT;
470
471	#if RTLNX_VER_MAX(4,16,0) && !RTLNX_RHEL_MAJ_PREREQ(7,6) && !RTLNX_SUSE_MAJ_PREREQ(15,1) && !RTLNX_SUSE_MAJ_PREREQ(12,5)
472	ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
473	#else
474	ret = ttm_bo_validate(&bo->bo, &bo->placement, &ctx);
475	#endif
476	if (ret)
477	return ret;
478
479	bo->pin_count = 1;
480
481	if (gpu_addr)
482	*gpu_addr = vbox_bo_gpu_offset(bo);
483
484	return 0;
485	}
486
487	int vbox_bo_unpin(struct vbox_bo *bo)
488	{
489	#if RTLNX_VER_MIN(4,16,0) \|\| RTLNX_RHEL_MAJ_PREREQ(7,6) \|\| RTLNX_SUSE_MAJ_PREREQ(15,1) \|\| RTLNX_SUSE_MAJ_PREREQ(12,5)
490	struct ttm_operation_ctx ctx = { false, false };
491	#endif
492	int i, ret;
493
494	if (!bo->pin_count) {
495	DRM_ERROR("unpin bad %p\n", bo);
496	return 0;
497	}
498	bo->pin_count--;
499	if (bo->pin_count)
500	return 0;
501
502	for (i = 0; i < bo->placement.num_placement; i++)
503	PLACEMENT_FLAGS(bo->placements[i]) &= ~TTM_PL_FLAG_NO_EVICT;
504
505	#if RTLNX_VER_MAX(4,16,0) && !RTLNX_RHEL_MAJ_PREREQ(7,6) && !RTLNX_SUSE_MAJ_PREREQ(15,1) && !RTLNX_SUSE_MAJ_PREREQ(12,5)
506	ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
507	#else
508	ret = ttm_bo_validate(&bo->bo, &bo->placement, &ctx);
509	#endif
510	if (ret)
511	return ret;
512
513	return 0;
514	}
515
516	/*
517	* Move a vbox-owned buffer object to system memory if no one else has it
518	* pinned. The caller must have pinned it previously, and this call will
519	* release the caller's pin.
520	*/
521	int vbox_bo_push_sysram(struct vbox_bo *bo)
522	{
523	#if RTLNX_VER_MIN(4,16,0) \|\| RTLNX_RHEL_MAJ_PREREQ(7,6) \|\| RTLNX_SUSE_MAJ_PREREQ(15,1) \|\| RTLNX_SUSE_MAJ_PREREQ(12,5)
524	struct ttm_operation_ctx ctx = { false, false };
525	#endif
526	int i, ret;
527
528	if (!bo->pin_count) {
529	DRM_ERROR("unpin bad %p\n", bo);
530	return 0;
531	}
532	bo->pin_count--;
533	if (bo->pin_count)
534	return 0;
535
536	if (bo->kmap.virtual)
537	ttm_bo_kunmap(&bo->kmap);
538
539	vbox_ttm_placement(bo, TTM_PL_FLAG_SYSTEM);
540
541	for (i = 0; i < bo->placement.num_placement; i++)
542	PLACEMENT_FLAGS(bo->placements[i]) \|= TTM_PL_FLAG_NO_EVICT;
543
544	#if RTLNX_VER_MAX(4,16,0) && !RTLNX_RHEL_MAJ_PREREQ(7,6) && !RTLNX_SUSE_MAJ_PREREQ(15,1) && !RTLNX_SUSE_MAJ_PREREQ(12,5)
545	ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
546	#else
547	ret = ttm_bo_validate(&bo->bo, &bo->placement, &ctx);
548	#endif
549	if (ret) {
550	DRM_ERROR("pushing to VRAM failed\n");
551	return ret;
552	}
553
554	return 0;
555	}
556
557	int vbox_mmap(struct file filp, struct vm_area_struct vma)
558	{
559	struct drm_file *file_priv;
560	struct vbox_private *vbox;
561
562	if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
563	return -EINVAL;
564
565	file_priv = filp->private_data;
566	vbox = file_priv->minor->dev->dev_private;
567
568	return ttm_bo_mmap(filp, vma, &vbox->ttm.bdev);
569	}

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source: vbox/trunk/src/VBox/Additions/linux/drm/vbox_ttm.c@ 85800

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