vbox_ttm.c@ 76553

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1	/* $Id: vbox_ttm.c 76553 2019-01-01 01:45:53Z vboxsync $ */
2	/** @file
3	* VirtualBox Additions Linux kernel video driver
4	*/
5
6	/*
7	* Copyright (C) 2013-2019 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 <ttm/ttm_page_alloc.h>
37
38	#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 18, 0) && !defined(RHEL_72)
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	static int vbox_ttm_mem_global_init(struct drm_global_reference *ref)
50	{
51	return ttm_mem_global_init(ref->object);
52	}
53
54	static void vbox_ttm_mem_global_release(struct drm_global_reference *ref)
55	{
56	ttm_mem_global_release(ref->object);
57	}
58
59	/**
60	* Adds the vbox memory manager object/structures to the global memory manager.
61	*/
62	static int vbox_ttm_global_init(struct vbox_private *vbox)
63	{
64	struct drm_global_reference *global_ref;
65	int ret;
66
67	global_ref = &vbox->ttm.mem_global_ref;
68	global_ref->global_type = DRM_GLOBAL_TTM_MEM;
69	global_ref->size = sizeof(struct ttm_mem_global);
70	global_ref->init = &vbox_ttm_mem_global_init;
71	global_ref->release = &vbox_ttm_mem_global_release;
72	ret = drm_global_item_ref(global_ref);
73	if (ret) {
74	DRM_ERROR("Failed setting up TTM memory subsystem.\n");
75	return ret;
76	}
77
78	vbox->ttm.bo_global_ref.mem_glob = vbox->ttm.mem_global_ref.object;
79	global_ref = &vbox->ttm.bo_global_ref.ref;
80	global_ref->global_type = DRM_GLOBAL_TTM_BO;
81	global_ref->size = sizeof(struct ttm_bo_global);
82	global_ref->init = &ttm_bo_global_init;
83	global_ref->release = &ttm_bo_global_release;
84
85	ret = drm_global_item_ref(global_ref);
86	if (ret) {
87	DRM_ERROR("Failed setting up TTM BO subsystem.\n");
88	drm_global_item_unref(&vbox->ttm.mem_global_ref);
89	return ret;
90	}
91
92	return 0;
93	}
94
95	/**
96	* Removes the vbox memory manager object from the global memory manager.
97	*/
98	static void vbox_ttm_global_release(struct vbox_private *vbox)
99	{
100	drm_global_item_unref(&vbox->ttm.bo_global_ref.ref);
101	drm_global_item_unref(&vbox->ttm.mem_global_ref);
102	}
103
104	static void vbox_bo_ttm_destroy(struct ttm_buffer_object *tbo)
105	{
106	struct vbox_bo *bo;
107
108	bo = container_of(tbo, struct vbox_bo, bo);
109
110	drm_gem_object_release(&bo->gem);
111	kfree(bo);
112	}
113
114	static bool vbox_ttm_bo_is_vbox_bo(struct ttm_buffer_object *bo)
115	{
116	if (bo->destroy == &vbox_bo_ttm_destroy)
117	return true;
118
119	return false;
120	}
121
122	static int
123	vbox_bo_init_mem_type(struct ttm_bo_device *bdev, u32 type,
124	struct ttm_mem_type_manager *man)
125	{
126	switch (type) {
127	case TTM_PL_SYSTEM:
128	man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
129	man->available_caching = TTM_PL_MASK_CACHING;
130	man->default_caching = TTM_PL_FLAG_CACHED;
131	break;
132	case TTM_PL_VRAM:
133	man->func = &ttm_bo_manager_func;
134	man->flags = TTM_MEMTYPE_FLAG_FIXED \| TTM_MEMTYPE_FLAG_MAPPABLE;
135	man->available_caching = TTM_PL_FLAG_UNCACHED \| TTM_PL_FLAG_WC;
136	man->default_caching = TTM_PL_FLAG_WC;
137	break;
138	default:
139	DRM_ERROR("Unsupported memory type %u\n", (unsigned int)type);
140	return -EINVAL;
141	}
142
143	return 0;
144	}
145
146	static void
147	vbox_bo_evict_flags(struct ttm_buffer_object bo, struct ttm_placement pl)
148	{
149	struct vbox_bo *vboxbo = vbox_bo(bo);
150
151	if (!vbox_ttm_bo_is_vbox_bo(bo))
152	return;
153
154	vbox_ttm_placement(vboxbo, TTM_PL_FLAG_SYSTEM);
155	*pl = vboxbo->placement;
156	}
157
158	static int vbox_bo_verify_access(struct ttm_buffer_object *bo,
159	struct file *filp)
160	{
161	return 0;
162	}
163
164	static int vbox_ttm_io_mem_reserve(struct ttm_bo_device *bdev,
165	struct ttm_mem_reg *mem)
166	{
167	struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
168	struct vbox_private *vbox = vbox_bdev(bdev);
169
170	mem->bus.addr = NULL;
171	mem->bus.offset = 0;
172	mem->bus.size = mem->num_pages << PAGE_SHIFT;
173	mem->bus.base = 0;
174	mem->bus.is_iomem = false;
175	if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
176	return -EINVAL;
177	switch (mem->mem_type) {
178	case TTM_PL_SYSTEM:
179	/* system memory */
180	return 0;
181	case TTM_PL_VRAM:
182	mem->bus.offset = mem->start << PAGE_SHIFT;
183	mem->bus.base = pci_resource_start(vbox->dev->pdev, 0);
184	mem->bus.is_iomem = true;
185	break;
186	default:
187	return -EINVAL;
188	}
189	return 0;
190	}
191
192	static void vbox_ttm_io_mem_free(struct ttm_bo_device *bdev,
193	struct ttm_mem_reg *mem)
194	{
195	}
196
197	static void vbox_ttm_backend_destroy(struct ttm_tt *tt)
198	{
199	ttm_tt_fini(tt);
200	kfree(tt);
201	}
202
203	static struct ttm_backend_func vbox_tt_backend_func = {
204	.destroy = &vbox_ttm_backend_destroy,
205	};
206
207	#if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 17, 0)) && !defined(RHEL_76)
208	static struct ttm_tt vbox_ttm_tt_create(struct ttm_bo_device bdev,
209	unsigned long size,
210	u32 page_flags,
211	struct page *dummy_read_page)
212	#else
213	static struct ttm_tt vbox_ttm_tt_create(struct ttm_buffer_object bo,
214	u32 page_flags)
215	#endif
216	{
217	struct ttm_tt *tt;
218
219	tt = kzalloc(sizeof(*tt), GFP_KERNEL);
220	if (!tt)
221	return NULL;
222
223	tt->func = &vbox_tt_backend_func;
224	#if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 17, 0)) && !defined(RHEL_76)
225	if (ttm_tt_init(tt, bdev, size, page_flags, dummy_read_page)) {
226	#else
227	if (ttm_tt_init(tt, bo, page_flags)) {
228	#endif
229	kfree(tt);
230	return NULL;
231	}
232
233	return tt;
234	}
235
236	#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 17, 0)
237	# if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 16, 0)) && !defined(RHEL_76)
238	static int vbox_ttm_tt_populate(struct ttm_tt *ttm)
239	{
240	return ttm_pool_populate(ttm);
241	}
242	# else
243	static int vbox_ttm_tt_populate(struct ttm_tt *ttm,
244	struct ttm_operation_ctx *ctx)
245	{
246	return ttm_pool_populate(ttm, ctx);
247	}
248	# endif
249
250	static void vbox_ttm_tt_unpopulate(struct ttm_tt *ttm)
251	{
252	ttm_pool_unpopulate(ttm);
253	}
254	#endif
255
256	static struct ttm_bo_driver vbox_bo_driver = {
257	.ttm_tt_create = vbox_ttm_tt_create,
258	#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 17, 0)
259	.ttm_tt_populate = vbox_ttm_tt_populate,
260	.ttm_tt_unpopulate = vbox_ttm_tt_unpopulate,
261	#endif
262	.init_mem_type = vbox_bo_init_mem_type,
263	#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 10, 0) \|\| defined(RHEL_74)
264	.eviction_valuable = ttm_bo_eviction_valuable,
265	#endif
266	.evict_flags = vbox_bo_evict_flags,
267	.verify_access = vbox_bo_verify_access,
268	.io_mem_reserve = &vbox_ttm_io_mem_reserve,
269	.io_mem_free = &vbox_ttm_io_mem_free,
270	#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 12, 0) \|\| defined(RHEL_75)
271	# if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 16, 0)) && !defined(RHEL_76)
272	.io_mem_pfn = ttm_bo_default_io_mem_pfn,
273	# endif
274	#endif
275	#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 7, 0) && LINUX_VERSION_CODE < KERNEL_VERSION(4, 11, 0)) \
276	\|\| defined(RHEL_74)
277	# ifndef RHEL_75
278	.lru_tail = &ttm_bo_default_lru_tail,
279	.swap_lru_tail = &ttm_bo_default_swap_lru_tail,
280	# endif
281	#endif
282	};
283
284	int vbox_mm_init(struct vbox_private *vbox)
285	{
286	int ret;
287	struct drm_device *dev = vbox->dev;
288	struct ttm_bo_device *bdev = &vbox->ttm.bdev;
289
290	ret = vbox_ttm_global_init(vbox);
291	if (ret)
292	return ret;
293
294	ret = ttm_bo_device_init(&vbox->ttm.bdev,
295	vbox->ttm.bo_global_ref.ref.object,
296	&vbox_bo_driver,
297	#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 15, 0) \|\| defined(RHEL_71)
298	dev->anon_inode->i_mapping,
299	#endif
300	DRM_FILE_PAGE_OFFSET, true);
301	if (ret) {
302	DRM_ERROR("Error initialising bo driver; %d\n", ret);
303	goto err_ttm_global_release;
304	}
305
306	ret = ttm_bo_init_mm(bdev, TTM_PL_VRAM,
307	vbox->available_vram_size >> PAGE_SHIFT);
308	if (ret) {
309	DRM_ERROR("Failed ttm VRAM init: %d\n", ret);
310	goto err_device_release;
311	}
312
313	#ifdef DRM_MTRR_WC
314	vbox->fb_mtrr = drm_mtrr_add(pci_resource_start(dev->pdev, 0),
315	pci_resource_len(dev->pdev, 0),
316	DRM_MTRR_WC);
317	#else
318	vbox->fb_mtrr = arch_phys_wc_add(pci_resource_start(dev->pdev, 0),
319	pci_resource_len(dev->pdev, 0));
320	#endif
321	return 0;
322
323	err_device_release:
324	ttm_bo_device_release(&vbox->ttm.bdev);
325	err_ttm_global_release:
326	vbox_ttm_global_release(vbox);
327	return ret;
328	}
329
330	void vbox_mm_fini(struct vbox_private *vbox)
331	{
332	#ifdef DRM_MTRR_WC
333	drm_mtrr_del(vbox->fb_mtrr,
334	pci_resource_start(vbox->dev->pdev, 0),
335	pci_resource_len(vbox->dev->pdev, 0), DRM_MTRR_WC);
336	#else
337	arch_phys_wc_del(vbox->fb_mtrr);
338	#endif
339	ttm_bo_device_release(&vbox->ttm.bdev);
340	vbox_ttm_global_release(vbox);
341	}
342
343	void vbox_ttm_placement(struct vbox_bo *bo, int domain)
344	{
345	u32 c = 0;
346	#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 18, 0) && !defined(RHEL_72)
347	bo->placement.fpfn = 0;
348	bo->placement.lpfn = 0;
349	#else
350	unsigned int i;
351	#endif
352
353	bo->placement.placement = bo->placements;
354	bo->placement.busy_placement = bo->placements;
355
356	if (domain & TTM_PL_FLAG_VRAM)
357	PLACEMENT_FLAGS(bo->placements[c++]) =
358	TTM_PL_FLAG_WC \| TTM_PL_FLAG_UNCACHED \| TTM_PL_FLAG_VRAM;
359	if (domain & TTM_PL_FLAG_SYSTEM)
360	PLACEMENT_FLAGS(bo->placements[c++]) =
361	TTM_PL_MASK_CACHING \| TTM_PL_FLAG_SYSTEM;
362	if (!c)
363	PLACEMENT_FLAGS(bo->placements[c++]) =
364	TTM_PL_MASK_CACHING \| TTM_PL_FLAG_SYSTEM;
365
366	bo->placement.num_placement = c;
367	bo->placement.num_busy_placement = c;
368
369	#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 18, 0) \|\| defined(RHEL_72)
370	for (i = 0; i < c; ++i) {
371	bo->placements[i].fpfn = 0;
372	bo->placements[i].lpfn = 0;
373	}
374	#endif
375	}
376
377	int vbox_bo_create(struct drm_device *dev, int size, int align,
378	u32 flags, struct vbox_bo **pvboxbo)
379	{
380	struct vbox_private *vbox = dev->dev_private;
381	struct vbox_bo *vboxbo;
382	size_t acc_size;
383	int ret;
384
385	vboxbo = kzalloc(sizeof(*vboxbo), GFP_KERNEL);
386	if (!vboxbo)
387	return -ENOMEM;
388
389	ret = drm_gem_object_init(dev, &vboxbo->gem, size);
390	if (ret)
391	goto err_free_vboxbo;
392
393	vboxbo->bo.bdev = &vbox->ttm.bdev;
394	#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 15, 0) && !defined(RHEL_71)
395	vboxbo->bo.bdev->dev_mapping = dev->dev_mapping;
396	#endif
397
398	vbox_ttm_placement(vboxbo, TTM_PL_FLAG_VRAM \| TTM_PL_FLAG_SYSTEM);
399
400	acc_size = ttm_bo_dma_acc_size(&vbox->ttm.bdev, size,
401	sizeof(struct vbox_bo));
402
403	ret = ttm_bo_init(&vbox->ttm.bdev, &vboxbo->bo, size,
404	ttm_bo_type_device, &vboxbo->placement,
405	#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 17, 0) && !defined(RHEL_76)
406	align >> PAGE_SHIFT, false, NULL, acc_size,
407	#else
408	align >> PAGE_SHIFT, false, acc_size,
409	#endif
410	#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 18, 0) \|\| defined(RHEL_72)
411	NULL, NULL, vbox_bo_ttm_destroy);
412	#else
413	NULL, vbox_bo_ttm_destroy);
414	#endif
415	if (ret)
416	goto err_free_vboxbo;
417
418	*pvboxbo = vboxbo;
419
420	return 0;
421
422	err_free_vboxbo:
423	kfree(vboxbo);
424	return ret;
425	}
426
427	static inline u64 vbox_bo_gpu_offset(struct vbox_bo *bo)
428	{
429	return bo->bo.offset;
430	}
431
432	int vbox_bo_pin(struct vbox_bo bo, u32 pl_flag, u64 gpu_addr)
433	{
434	#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 16, 0)) \|\| defined(RHEL_76)
435	struct ttm_operation_ctx ctx = { false, false };
436	#endif
437	int i, ret;
438
439	if (bo->pin_count) {
440	bo->pin_count++;
441	if (gpu_addr)
442	*gpu_addr = vbox_bo_gpu_offset(bo);
443
444	return 0;
445	}
446
447	vbox_ttm_placement(bo, pl_flag);
448
449	for (i = 0; i < bo->placement.num_placement; i++)
450	PLACEMENT_FLAGS(bo->placements[i]) \|= TTM_PL_FLAG_NO_EVICT;
451
452	#if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 16, 0)) && !defined(RHEL_76)
453	ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
454	#else
455	ret = ttm_bo_validate(&bo->bo, &bo->placement, &ctx);
456	#endif
457	if (ret)
458	return ret;
459
460	bo->pin_count = 1;
461
462	if (gpu_addr)
463	*gpu_addr = vbox_bo_gpu_offset(bo);
464
465	return 0;
466	}
467
468	int vbox_bo_unpin(struct vbox_bo *bo)
469	{
470	#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 16, 0)) \|\| defined(RHEL_76)
471	struct ttm_operation_ctx ctx = { false, false };
472	#endif
473	int i, ret;
474
475	if (!bo->pin_count) {
476	DRM_ERROR("unpin bad %p\n", bo);
477	return 0;
478	}
479	bo->pin_count--;
480	if (bo->pin_count)
481	return 0;
482
483	for (i = 0; i < bo->placement.num_placement; i++)
484	PLACEMENT_FLAGS(bo->placements[i]) &= ~TTM_PL_FLAG_NO_EVICT;
485
486	#if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 16, 0)) && !defined(RHEL_76)
487	ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
488	#else
489	ret = ttm_bo_validate(&bo->bo, &bo->placement, &ctx);
490	#endif
491	if (ret)
492	return ret;
493
494	return 0;
495	}
496
497	/*
498	* Move a vbox-owned buffer object to system memory if no one else has it
499	* pinned. The caller must have pinned it previously, and this call will
500	* release the caller's pin.
501	*/
502	int vbox_bo_push_sysram(struct vbox_bo *bo)
503	{
504	#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 16, 0)) \|\| defined(RHEL_76)
505	struct ttm_operation_ctx ctx = { false, false };
506	#endif
507	int i, ret;
508
509	if (!bo->pin_count) {
510	DRM_ERROR("unpin bad %p\n", bo);
511	return 0;
512	}
513	bo->pin_count--;
514	if (bo->pin_count)
515	return 0;
516
517	if (bo->kmap.virtual)
518	ttm_bo_kunmap(&bo->kmap);
519
520	vbox_ttm_placement(bo, TTM_PL_FLAG_SYSTEM);
521
522	for (i = 0; i < bo->placement.num_placement; i++)
523	PLACEMENT_FLAGS(bo->placements[i]) \|= TTM_PL_FLAG_NO_EVICT;
524
525	#if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 16, 0)) && !defined(RHEL_76)
526	ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
527	#else
528	ret = ttm_bo_validate(&bo->bo, &bo->placement, &ctx);
529	#endif
530	if (ret) {
531	DRM_ERROR("pushing to VRAM failed\n");
532	return ret;
533	}
534
535	return 0;
536	}
537
538	int vbox_mmap(struct file filp, struct vm_area_struct vma)
539	{
540	struct drm_file *file_priv;
541	struct vbox_private *vbox;
542
543	if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
544	return -EINVAL;
545
546	file_priv = filp->private_data;
547	vbox = file_priv->minor->dev->dev_private;
548
549	return ttm_bo_mmap(filp, vma, &vbox->ttm.bdev);
550	}

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source: vbox/trunk/src/VBox/Additions/linux/drm/vbox_ttm.c@ 76553

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