[linux-2.6-block.git] / drivers / gpu / drm / ast / ast_ttm.c

/*
 * Copyright 2012 Red Hat Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
 * USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 *
 */
/*
 * Authors: Dave Airlie <airlied@redhat.com>
 */
#include <drm/drmP.h>
#include "ast_drv.h"
#include <ttm/ttm_page_alloc.h>

static inline struct ast_private *
ast_bdev(struct ttm_bo_device *bd)
{
	return container_of(bd, struct ast_private, ttm.bdev);
}

static int
ast_ttm_mem_global_init(struct drm_global_reference *ref)
{
	return ttm_mem_global_init(ref->object);
}

static void
ast_ttm_mem_global_release(struct drm_global_reference *ref)
{
	ttm_mem_global_release(ref->object);
}

static int ast_ttm_global_init(struct ast_private *ast)
{
	struct drm_global_reference *global_ref;
	int r;

	global_ref = &ast->ttm.mem_global_ref;
	global_ref->global_type = DRM_GLOBAL_TTM_MEM;
	global_ref->size = sizeof(struct ttm_mem_global);
	global_ref->init = &ast_ttm_mem_global_init;
	global_ref->release = &ast_ttm_mem_global_release;
	r = drm_global_item_ref(global_ref);
	if (r != 0) {
		DRM_ERROR("Failed setting up TTM memory accounting "
			  "subsystem.\n");
		return r;
	}

	ast->ttm.bo_global_ref.mem_glob =
		ast->ttm.mem_global_ref.object;
	global_ref = &ast->ttm.bo_global_ref.ref;
	global_ref->global_type = DRM_GLOBAL_TTM_BO;
	global_ref->size = sizeof(struct ttm_bo_global);
	global_ref->init = &ttm_bo_global_init;
	global_ref->release = &ttm_bo_global_release;
	r = drm_global_item_ref(global_ref);
	if (r != 0) {
		DRM_ERROR("Failed setting up TTM BO subsystem.\n");
		drm_global_item_unref(&ast->ttm.mem_global_ref);
		return r;
	}
	return 0;
}

void
ast_ttm_global_release(struct ast_private *ast)
{
	if (ast->ttm.mem_global_ref.release == NULL)
		return;

	drm_global_item_unref(&ast->ttm.bo_global_ref.ref);
	drm_global_item_unref(&ast->ttm.mem_global_ref);
	ast->ttm.mem_global_ref.release = NULL;
}


static void ast_bo_ttm_destroy(struct ttm_buffer_object *tbo)
{
	struct ast_bo *bo;

	bo = container_of(tbo, struct ast_bo, bo);

	drm_gem_object_release(&bo->gem);
	kfree(bo);
}

bool ast_ttm_bo_is_ast_bo(struct ttm_buffer_object *bo)
{
	if (bo->destroy == &ast_bo_ttm_destroy)
		return true;
	return false;
}

static int
ast_bo_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
		     struct ttm_mem_type_manager *man)
{
	switch (type) {
	case TTM_PL_SYSTEM:
		man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
		man->available_caching = TTM_PL_MASK_CACHING;
		man->default_caching = TTM_PL_FLAG_CACHED;
		break;
	case TTM_PL_VRAM:
		man->func = &ttm_bo_manager_func;
		man->flags = TTM_MEMTYPE_FLAG_FIXED |
			TTM_MEMTYPE_FLAG_MAPPABLE;
		man->available_caching = TTM_PL_FLAG_UNCACHED |
			TTM_PL_FLAG_WC;
		man->default_caching = TTM_PL_FLAG_WC;
		break;
	default:
		DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
		return -EINVAL;
	}
	return 0;
}

static void
ast_bo_evict_flags(struct ttm_buffer_object *bo, struct ttm_placement *pl)
{
	struct ast_bo *astbo = ast_bo(bo);

	if (!ast_ttm_bo_is_ast_bo(bo))
		return;

	ast_ttm_placement(astbo, TTM_PL_FLAG_SYSTEM);
	*pl = astbo->placement;
}

static int ast_bo_verify_access(struct ttm_buffer_object *bo, struct file *filp)
{
	struct ast_bo *astbo = ast_bo(bo);

	return drm_vma_node_verify_access(&astbo->gem.vma_node, filp);
}

static int ast_ttm_io_mem_reserve(struct ttm_bo_device *bdev,
				  struct ttm_mem_reg *mem)
{
	struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
	struct ast_private *ast = ast_bdev(bdev);

	mem->bus.addr = NULL;
	mem->bus.offset = 0;
	mem->bus.size = mem->num_pages << PAGE_SHIFT;
	mem->bus.base = 0;
	mem->bus.is_iomem = false;
	if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
		return -EINVAL;
	switch (mem->mem_type) {
	case TTM_PL_SYSTEM:
		/* system memory */
		return 0;
	case TTM_PL_VRAM:
		mem->bus.offset = mem->start << PAGE_SHIFT;
		mem->bus.base = pci_resource_start(ast->dev->pdev, 0);
		mem->bus.is_iomem = true;
		break;
	default:
		return -EINVAL;
		break;
	}
	return 0;
}

static void ast_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
{
}

static int ast_bo_move(struct ttm_buffer_object *bo,
		       bool evict, bool interruptible,
		       bool no_wait_gpu,
		       struct ttm_mem_reg *new_mem)
{
	int r;
	r = ttm_bo_move_memcpy(bo, evict, no_wait_gpu, new_mem);
	return r;
}


static void ast_ttm_backend_destroy(struct ttm_tt *tt)
{
	ttm_tt_fini(tt);
	kfree(tt);
}

static struct ttm_backend_func ast_tt_backend_func = {
	.destroy = &ast_ttm_backend_destroy,
};


struct ttm_tt *ast_ttm_tt_create(struct ttm_bo_device *bdev,
				 unsigned long size, uint32_t page_flags,
				 struct page *dummy_read_page)
{
	struct ttm_tt *tt;

	tt = kzalloc(sizeof(struct ttm_tt), GFP_KERNEL);
	if (tt == NULL)
		return NULL;
	tt->func = &ast_tt_backend_func;
	if (ttm_tt_init(tt, bdev, size, page_flags, dummy_read_page)) {
		kfree(tt);
		return NULL;
	}
	return tt;
}

static int ast_ttm_tt_populate(struct ttm_tt *ttm)
{
	return ttm_pool_populate(ttm);
}

static void ast_ttm_tt_unpopulate(struct ttm_tt *ttm)
{
	ttm_pool_unpopulate(ttm);
}

struct ttm_bo_driver ast_bo_driver = {
	.ttm_tt_create = ast_ttm_tt_create,
	.ttm_tt_populate = ast_ttm_tt_populate,
	.ttm_tt_unpopulate = ast_ttm_tt_unpopulate,
	.init_mem_type = ast_bo_init_mem_type,
	.evict_flags = ast_bo_evict_flags,
	.move = ast_bo_move,
	.verify_access = ast_bo_verify_access,
	.io_mem_reserve = &ast_ttm_io_mem_reserve,
	.io_mem_free = &ast_ttm_io_mem_free,
};

int ast_mm_init(struct ast_private *ast)
{
	int ret;
	struct drm_device *dev = ast->dev;
	struct ttm_bo_device *bdev = &ast->ttm.bdev;

	ret = ast_ttm_global_init(ast);
	if (ret)
		return ret;

	ret = ttm_bo_device_init(&ast->ttm.bdev,
				 ast->ttm.bo_global_ref.ref.object,
				 &ast_bo_driver, DRM_FILE_PAGE_OFFSET,
				 true);
	if (ret) {
		DRM_ERROR("Error initialising bo driver; %d\n", ret);
		return ret;
	}

	ret = ttm_bo_init_mm(bdev, TTM_PL_VRAM,
			     ast->vram_size >> PAGE_SHIFT);
	if (ret) {
		DRM_ERROR("Failed ttm VRAM init: %d\n", ret);
		return ret;
	}

	ast->fb_mtrr = arch_phys_wc_add(pci_resource_start(dev->pdev, 0),
					pci_resource_len(dev->pdev, 0));

	return 0;
}

void ast_mm_fini(struct ast_private *ast)
{
	ttm_bo_device_release(&ast->ttm.bdev);

	ast_ttm_global_release(ast);

	arch_phys_wc_del(ast->fb_mtrr);
}

void ast_ttm_placement(struct ast_bo *bo, int domain)
{
	u32 c = 0;
	bo->placement.fpfn = 0;
	bo->placement.lpfn = 0;
	bo->placement.placement = bo->placements;
	bo->placement.busy_placement = bo->placements;
	if (domain & TTM_PL_FLAG_VRAM)
		bo->placements[c++] = TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_VRAM;
	if (domain & TTM_PL_FLAG_SYSTEM)
		bo->placements[c++] = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
	if (!c)
		bo->placements[c++] = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
	bo->placement.num_placement = c;
	bo->placement.num_busy_placement = c;
}

int ast_bo_create(struct drm_device *dev, int size, int align,
		  uint32_t flags, struct ast_bo **pastbo)
{
	struct ast_private *ast = dev->dev_private;
	struct ast_bo *astbo;
	size_t acc_size;
	int ret;

	astbo = kzalloc(sizeof(struct ast_bo), GFP_KERNEL);
	if (!astbo)
		return -ENOMEM;

	ret = drm_gem_object_init(dev, &astbo->gem, size);
	if (ret) {
		kfree(astbo);
		return ret;
	}

	astbo->bo.bdev = &ast->ttm.bdev;
	astbo->bo.bdev->dev_mapping = dev->dev_mapping;

	ast_ttm_placement(astbo, TTM_PL_FLAG_VRAM | TTM_PL_FLAG_SYSTEM);

	acc_size = ttm_bo_dma_acc_size(&ast->ttm.bdev, size,
				       sizeof(struct ast_bo));

	ret = ttm_bo_init(&ast->ttm.bdev, &astbo->bo, size,
			  ttm_bo_type_device, &astbo->placement,
			  align >> PAGE_SHIFT, false, NULL, acc_size,
			  NULL, ast_bo_ttm_destroy);
	if (ret)
		return ret;

	*pastbo = astbo;
	return 0;
}

static inline u64 ast_bo_gpu_offset(struct ast_bo *bo)
{
	return bo->bo.offset;
}

int ast_bo_pin(struct ast_bo *bo, u32 pl_flag, u64 *gpu_addr)
{
	int i, ret;

	if (bo->pin_count) {
		bo->pin_count++;
		if (gpu_addr)
			*gpu_addr = ast_bo_gpu_offset(bo);
	}

	ast_ttm_placement(bo, pl_flag);
	for (i = 0; i < bo->placement.num_placement; i++)
		bo->placements[i] |= TTM_PL_FLAG_NO_EVICT;
	ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
	if (ret)
		return ret;

	bo->pin_count = 1;
	if (gpu_addr)
		*gpu_addr = ast_bo_gpu_offset(bo);
	return 0;
}

int ast_bo_unpin(struct ast_bo *bo)
{
	int i, ret;
	if (!bo->pin_count) {
		DRM_ERROR("unpin bad %p\n", bo);
		return 0;
	}
	bo->pin_count--;
	if (bo->pin_count)
		return 0;

	for (i = 0; i < bo->placement.num_placement ; i++)
		bo->placements[i] &= ~TTM_PL_FLAG_NO_EVICT;
	ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
	if (ret)
		return ret;

	return 0;
}

int ast_bo_push_sysram(struct ast_bo *bo)
{
	int i, ret;
	if (!bo->pin_count) {
		DRM_ERROR("unpin bad %p\n", bo);
		return 0;
	}
	bo->pin_count--;
	if (bo->pin_count)
		return 0;

	if (bo->kmap.virtual)
		ttm_bo_kunmap(&bo->kmap);

	ast_ttm_placement(bo, TTM_PL_FLAG_SYSTEM);
	for (i = 0; i < bo->placement.num_placement ; i++)
		bo->placements[i] |= TTM_PL_FLAG_NO_EVICT;

	ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
	if (ret) {
		DRM_ERROR("pushing to VRAM failed\n");
		return ret;
	}
	return 0;
}

int ast_mmap(struct file *filp, struct vm_area_struct *vma)
{
	struct drm_file *file_priv;
	struct ast_private *ast;

	if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
		return drm_mmap(filp, vma);

	file_priv = filp->private_data;
	ast = file_priv->minor->dev->dev_private;
	return ttm_bo_mmap(filp, vma, &ast->ttm.bdev);
}
Commit	Line	Data
312fec14 DA	1	/*
	2	* Copyright 2012 Red Hat Inc.
	3	*
	4	* Permission is hereby granted, free of charge, to any person obtaining a
	5	* copy of this software and associated documentation files (the
	6	* "Software"), to deal in the Software without restriction, including
	7	* without limitation the rights to use, copy, modify, merge, publish,
	8	* distribute, sub license, and/or sell copies of the Software, and to
	9	* permit persons to whom the Software is furnished to do so, subject to
	10	* the following conditions:
	11	*
	12	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	13	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	14	* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
	15	* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
	16	* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
	17	* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
	18	* USE OR OTHER DEALINGS IN THE SOFTWARE.
	19	*
	20	* The above copyright notice and this permission notice (including the
	21	* next paragraph) shall be included in all copies or substantial portions
	22	* of the Software.
	23	*
	24	*/
	25	/*
	26	* Authors: Dave Airlie <airlied@redhat.com>
	27	*/
760285e7	28	#include <drm/drmP.h>
312fec14 DA	29	#include "ast_drv.h"
	30	#include <ttm/ttm_page_alloc.h>
	31
	32	static inline struct ast_private *
	33	ast_bdev(struct ttm_bo_device *bd)
	34	{
	35	return container_of(bd, struct ast_private, ttm.bdev);
	36	}
	37
	38	static int
	39	ast_ttm_mem_global_init(struct drm_global_reference *ref)
	40	{
	41	return ttm_mem_global_init(ref->object);
	42	}
	43
	44	static void
	45	ast_ttm_mem_global_release(struct drm_global_reference *ref)
	46	{
	47	ttm_mem_global_release(ref->object);
	48	}
	49
	50	static int ast_ttm_global_init(struct ast_private *ast)
	51	{
	52	struct drm_global_reference *global_ref;
	53	int r;
	54
	55	global_ref = &ast->ttm.mem_global_ref;
	56	global_ref->global_type = DRM_GLOBAL_TTM_MEM;
	57	global_ref->size = sizeof(struct ttm_mem_global);
	58	global_ref->init = &ast_ttm_mem_global_init;
	59	global_ref->release = &ast_ttm_mem_global_release;
	60	r = drm_global_item_ref(global_ref);
	61	if (r != 0) {
	62	DRM_ERROR("Failed setting up TTM memory accounting "
	63	"subsystem.\n");
	64	return r;
	65	}
	66
	67	ast->ttm.bo_global_ref.mem_glob =
	68	ast->ttm.mem_global_ref.object;
	69	global_ref = &ast->ttm.bo_global_ref.ref;
	70	global_ref->global_type = DRM_GLOBAL_TTM_BO;
	71	global_ref->size = sizeof(struct ttm_bo_global);
	72	global_ref->init = &ttm_bo_global_init;
	73	global_ref->release = &ttm_bo_global_release;
	74	r = drm_global_item_ref(global_ref);
	75	if (r != 0) {
	76	DRM_ERROR("Failed setting up TTM BO subsystem.\n");
	77	drm_global_item_unref(&ast->ttm.mem_global_ref);
	78	return r;
	79	}
	80	return 0;
	81	}
	82
	83	void
	84	ast_ttm_global_release(struct ast_private *ast)
	85	{
	86	if (ast->ttm.mem_global_ref.release == NULL)
	87	return;
	88
	89	drm_global_item_unref(&ast->ttm.bo_global_ref.ref);
	90	drm_global_item_unref(&ast->ttm.mem_global_ref);
	91	ast->ttm.mem_global_ref.release = NULL;
	92	}
93
94
95	static void ast_bo_ttm_destroy(struct ttm_buffer_object *tbo)
96	{
97	struct ast_bo *bo;
98
99	bo = container_of(tbo, struct ast_bo, bo);
100
101	drm_gem_object_release(&bo->gem);
102	kfree(bo);
103	}
104
105	bool ast_ttm_bo_is_ast_bo(struct ttm_buffer_object *bo)
106	{
107	if (bo->destroy == &ast_bo_ttm_destroy)
108	return true;
109	return false;
110	}
111
112	static int
113	ast_bo_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
114	struct ttm_mem_type_manager *man)
115	{
116	switch (type) {
117	case TTM_PL_SYSTEM:
118	man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
119	man->available_caching = TTM_PL_MASK_CACHING;
120	man->default_caching = TTM_PL_FLAG_CACHED;
121	break;
122	case TTM_PL_VRAM:
123	man->func = &ttm_bo_manager_func;
124	man->flags = TTM_MEMTYPE_FLAG_FIXED \|
125	TTM_MEMTYPE_FLAG_MAPPABLE;
126	man->available_caching = TTM_PL_FLAG_UNCACHED \|
127	TTM_PL_FLAG_WC;
128	man->default_caching = TTM_PL_FLAG_WC;
129	break;
130	default:
131	DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
132	return -EINVAL;
133	}
134	return 0;
135	}
136
137	static void
138	ast_bo_evict_flags(struct ttm_buffer_object bo, struct ttm_placement pl)
139	{
140	struct ast_bo *astbo = ast_bo(bo);
141
142	if (!ast_ttm_bo_is_ast_bo(bo))
143	return;
144
145	ast_ttm_placement(astbo, TTM_PL_FLAG_SYSTEM);
146	*pl = astbo->placement;
147	}
148
149	static int ast_bo_verify_access(struct ttm_buffer_object bo, struct file filp)
150	{
acb46527 DH	151	struct ast_bo *astbo = ast_bo(bo);
	152
	153	return drm_vma_node_verify_access(&astbo->gem.vma_node, filp);
312fec14 DA	154	}
	155
	156	static int ast_ttm_io_mem_reserve(struct ttm_bo_device *bdev,
	157	struct ttm_mem_reg *mem)
	158	{
	159	struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
	160	struct ast_private *ast = ast_bdev(bdev);
	161
	162	mem->bus.addr = NULL;
	163	mem->bus.offset = 0;
	164	mem->bus.size = mem->num_pages << PAGE_SHIFT;
	165	mem->bus.base = 0;
	166	mem->bus.is_iomem = false;
	167	if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
	168	return -EINVAL;
	169	switch (mem->mem_type) {
	170	case TTM_PL_SYSTEM:
	171	/* system memory */
	172	return 0;
	173	case TTM_PL_VRAM:
	174	mem->bus.offset = mem->start << PAGE_SHIFT;
	175	mem->bus.base = pci_resource_start(ast->dev->pdev, 0);
	176	mem->bus.is_iomem = true;
	177	break;
	178	default:
	179	return -EINVAL;
	180	break;
	181	}
	182	return 0;
	183	}
	184
	185	static void ast_ttm_io_mem_free(struct ttm_bo_device bdev, struct ttm_mem_reg mem)
	186	{
	187	}
	188
	189	static int ast_bo_move(struct ttm_buffer_object *bo,
	190	bool evict, bool interruptible,
97a875cb	191	bool no_wait_gpu,
312fec14 DA	192	struct ttm_mem_reg *new_mem)
	193	{
	194	int r;
97a875cb	195	r = ttm_bo_move_memcpy(bo, evict, no_wait_gpu, new_mem);
312fec14 DA	196	return r;
	197	}
	198
	199
	200	static void ast_ttm_backend_destroy(struct ttm_tt *tt)
	201	{
	202	ttm_tt_fini(tt);
	203	kfree(tt);
	204	}
	205
	206	static struct ttm_backend_func ast_tt_backend_func = {
	207	.destroy = &ast_ttm_backend_destroy,
	208	};
	209
	210
	211	struct ttm_tt ast_ttm_tt_create(struct ttm_bo_device bdev,
	212	unsigned long size, uint32_t page_flags,
	213	struct page *dummy_read_page)
	214	{
	215	struct ttm_tt *tt;
	216
	217	tt = kzalloc(sizeof(struct ttm_tt), GFP_KERNEL);
	218	if (tt == NULL)
	219	return NULL;
	220	tt->func = &ast_tt_backend_func;
	221	if (ttm_tt_init(tt, bdev, size, page_flags, dummy_read_page)) {
	222	kfree(tt);
	223	return NULL;
	224	}
	225	return tt;
	226	}
	227
	228	static int ast_ttm_tt_populate(struct ttm_tt *ttm)
	229	{
	230	return ttm_pool_populate(ttm);
	231	}
	232
	233	static void ast_ttm_tt_unpopulate(struct ttm_tt *ttm)
	234	{
	235	ttm_pool_unpopulate(ttm);
	236	}
	237
	238	struct ttm_bo_driver ast_bo_driver = {
	239	.ttm_tt_create = ast_ttm_tt_create,
	240	.ttm_tt_populate = ast_ttm_tt_populate,
	241	.ttm_tt_unpopulate = ast_ttm_tt_unpopulate,
	242	.init_mem_type = ast_bo_init_mem_type,
	243	.evict_flags = ast_bo_evict_flags,
	244	.move = ast_bo_move,
	245	.verify_access = ast_bo_verify_access,
	246	.io_mem_reserve = &ast_ttm_io_mem_reserve,
	247	.io_mem_free = &ast_ttm_io_mem_free,
	248	};
	249
	250	int ast_mm_init(struct ast_private *ast)
	251	{
	252	int ret;
	253	struct drm_device *dev = ast->dev;
	254	struct ttm_bo_device *bdev = &ast->ttm.bdev;
	255
	256	ret = ast_ttm_global_init(ast);
	257	if (ret)
	258	return ret;
	259
260	ret = ttm_bo_device_init(&ast->ttm.bdev,
261	ast->ttm.bo_global_ref.ref.object,
262	&ast_bo_driver, DRM_FILE_PAGE_OFFSET,
263	true);
264	if (ret) {
265	DRM_ERROR("Error initialising bo driver; %d\n", ret);
266	return ret;
267	}
268
269	ret = ttm_bo_init_mm(bdev, TTM_PL_VRAM,
270	ast->vram_size >> PAGE_SHIFT);
271	if (ret) {
272	DRM_ERROR("Failed ttm VRAM init: %d\n", ret);
273	return ret;
274	}
275
247d36d7 AL	276	ast->fb_mtrr = arch_phys_wc_add(pci_resource_start(dev->pdev, 0),
247d36d7 AL	277	pci_resource_len(dev->pdev, 0));
312fec14 DA	278
	279	return 0;
	280	}
	281
	282	void ast_mm_fini(struct ast_private *ast)
	283	{
312fec14 DA	284	ttm_bo_device_release(&ast->ttm.bdev);
	285
	286	ast_ttm_global_release(ast);
	287
247d36d7	288	arch_phys_wc_del(ast->fb_mtrr);
312fec14 DA	289	}
	290
	291	void ast_ttm_placement(struct ast_bo *bo, int domain)
	292	{
	293	u32 c = 0;
	294	bo->placement.fpfn = 0;
	295	bo->placement.lpfn = 0;
	296	bo->placement.placement = bo->placements;
	297	bo->placement.busy_placement = bo->placements;
	298	if (domain & TTM_PL_FLAG_VRAM)
	299	bo->placements[c++] = TTM_PL_FLAG_WC \| TTM_PL_FLAG_UNCACHED \| TTM_PL_FLAG_VRAM;
	300	if (domain & TTM_PL_FLAG_SYSTEM)
	301	bo->placements[c++] = TTM_PL_MASK_CACHING \| TTM_PL_FLAG_SYSTEM;
	302	if (!c)
	303	bo->placements[c++] = TTM_PL_MASK_CACHING \| TTM_PL_FLAG_SYSTEM;
	304	bo->placement.num_placement = c;
	305	bo->placement.num_busy_placement = c;
	306	}
	307
312fec14 DA	308	int ast_bo_create(struct drm_device *dev, int size, int align,
	309	uint32_t flags, struct ast_bo **pastbo)
	310	{
	311	struct ast_private *ast = dev->dev_private;
	312	struct ast_bo *astbo;
	313	size_t acc_size;
	314	int ret;
	315
	316	astbo = kzalloc(sizeof(struct ast_bo), GFP_KERNEL);
	317	if (!astbo)
	318	return -ENOMEM;
	319
	320	ret = drm_gem_object_init(dev, &astbo->gem, size);
	321	if (ret) {
	322	kfree(astbo);
	323	return ret;
	324	}
	325
312fec14	326	astbo->bo.bdev = &ast->ttm.bdev;
3ac65259	327	astbo->bo.bdev->dev_mapping = dev->dev_mapping;
312fec14 DA	328
	329	ast_ttm_placement(astbo, TTM_PL_FLAG_VRAM \| TTM_PL_FLAG_SYSTEM);
	330
	331	acc_size = ttm_bo_dma_acc_size(&ast->ttm.bdev, size,
	332	sizeof(struct ast_bo));
	333
	334	ret = ttm_bo_init(&ast->ttm.bdev, &astbo->bo, size,
	335	ttm_bo_type_device, &astbo->placement,
0b91c4a1	336	align >> PAGE_SHIFT, false, NULL, acc_size,
5288b7b2	337	NULL, ast_bo_ttm_destroy);
312fec14 DA	338	if (ret)
	339	return ret;
	340
	341	*pastbo = astbo;
	342	return 0;
	343	}
	344
	345	static inline u64 ast_bo_gpu_offset(struct ast_bo *bo)
	346	{
	347	return bo->bo.offset;
	348	}
	349
	350	int ast_bo_pin(struct ast_bo bo, u32 pl_flag, u64 gpu_addr)
	351	{
	352	int i, ret;
	353
	354	if (bo->pin_count) {
	355	bo->pin_count++;
	356	if (gpu_addr)
	357	*gpu_addr = ast_bo_gpu_offset(bo);
	358	}
	359
	360	ast_ttm_placement(bo, pl_flag);
	361	for (i = 0; i < bo->placement.num_placement; i++)
	362	bo->placements[i] \|= TTM_PL_FLAG_NO_EVICT;
97a875cb	363	ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
312fec14 DA	364	if (ret)
	365	return ret;
	366
	367	bo->pin_count = 1;
	368	if (gpu_addr)
	369	*gpu_addr = ast_bo_gpu_offset(bo);
	370	return 0;
	371	}
	372
	373	int ast_bo_unpin(struct ast_bo *bo)
	374	{
	375	int i, ret;
	376	if (!bo->pin_count) {
	377	DRM_ERROR("unpin bad %p\n", bo);
	378	return 0;
	379	}
	380	bo->pin_count--;
	381	if (bo->pin_count)
	382	return 0;
	383
	384	for (i = 0; i < bo->placement.num_placement ; i++)
	385	bo->placements[i] &= ~TTM_PL_FLAG_NO_EVICT;
97a875cb	386	ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
312fec14 DA	387	if (ret)
	388	return ret;
	389
	390	return 0;
	391	}
	392
	393	int ast_bo_push_sysram(struct ast_bo *bo)
	394	{
	395	int i, ret;
	396	if (!bo->pin_count) {
	397	DRM_ERROR("unpin bad %p\n", bo);
	398	return 0;
	399	}
	400	bo->pin_count--;
	401	if (bo->pin_count)
	402	return 0;
	403
	404	if (bo->kmap.virtual)
	405	ttm_bo_kunmap(&bo->kmap);
	406
	407	ast_ttm_placement(bo, TTM_PL_FLAG_SYSTEM);
	408	for (i = 0; i < bo->placement.num_placement ; i++)
	409	bo->placements[i] \|= TTM_PL_FLAG_NO_EVICT;
	410
97a875cb	411	ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false);
312fec14 DA	412	if (ret) {
	413	DRM_ERROR("pushing to VRAM failed\n");
	414	return ret;
	415	}
	416	return 0;
	417	}
	418
	419	int ast_mmap(struct file filp, struct vm_area_struct vma)
	420	{
	421	struct drm_file *file_priv;
	422	struct ast_private *ast;
	423
	424	if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
	425	return drm_mmap(filp, vma);
	426
	427	file_priv = filp->private_data;
	428	ast = file_priv->minor->dev->dev_private;
	429	return ttm_bo_mmap(filp, vma, &ast->ttm.bdev);
	430	}