[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / gpu / drm / cirrus / cirrus_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 "cirrus_drv.h"
#include <ttm/ttm_page_alloc.h>

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

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

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

static int cirrus_ttm_global_init(struct cirrus_device *cirrus)
{
	struct drm_global_reference *global_ref;
	int r;

	global_ref = &cirrus->ttm.mem_global_ref;
	global_ref->global_type = DRM_GLOBAL_TTM_MEM;
	global_ref->size = sizeof(struct ttm_mem_global);
	global_ref->init = &cirrus_ttm_mem_global_init;
	global_ref->release = &cirrus_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;
	}

	cirrus->ttm.bo_global_ref.mem_glob =
		cirrus->ttm.mem_global_ref.object;
	global_ref = &cirrus->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(&cirrus->ttm.mem_global_ref);
		return r;
	}
	return 0;
}

void
cirrus_ttm_global_release(struct cirrus_device *cirrus)
{
	if (cirrus->ttm.mem_global_ref.release == NULL)
		return;

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


static void cirrus_bo_ttm_destroy(struct ttm_buffer_object *tbo)
{
	struct cirrus_bo *bo;

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

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

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

static int
cirrus_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
cirrus_bo_evict_flags(struct ttm_buffer_object *bo, struct ttm_placement *pl)
{
	struct cirrus_bo *cirrusbo = cirrus_bo(bo);

	if (!cirrus_ttm_bo_is_cirrus_bo(bo))
		return;

	cirrus_ttm_placement(cirrusbo, TTM_PL_FLAG_SYSTEM);
	*pl = cirrusbo->placement;
}

static int cirrus_bo_verify_access(struct ttm_buffer_object *bo, struct file *filp)
{
	return 0;
}

static int cirrus_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 cirrus_device *cirrus = cirrus_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(cirrus->dev->pdev, 0);
		mem->bus.is_iomem = true;
		break;
	default:
		return -EINVAL;
		break;
	}
	return 0;
}

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

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


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

static struct ttm_backend_func cirrus_tt_backend_func = {
	.destroy = &cirrus_ttm_backend_destroy,
};


struct ttm_tt *cirrus_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 = &cirrus_tt_backend_func;
	if (ttm_tt_init(tt, bdev, size, page_flags, dummy_read_page)) {
		kfree(tt);
		return NULL;
	}
	return tt;
}

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

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

struct ttm_bo_driver cirrus_bo_driver = {
	.ttm_tt_create = cirrus_ttm_tt_create,
	.ttm_tt_populate = cirrus_ttm_tt_populate,
	.ttm_tt_unpopulate = cirrus_ttm_tt_unpopulate,
	.init_mem_type = cirrus_bo_init_mem_type,
	.evict_flags = cirrus_bo_evict_flags,
	.move = cirrus_bo_move,
	.verify_access = cirrus_bo_verify_access,
	.io_mem_reserve = &cirrus_ttm_io_mem_reserve,
	.io_mem_free = &cirrus_ttm_io_mem_free,
};

int cirrus_mm_init(struct cirrus_device *cirrus)
{
	int ret;
	struct drm_device *dev = cirrus->dev;
	struct ttm_bo_device *bdev = &cirrus->ttm.bdev;

	ret = cirrus_ttm_global_init(cirrus);
	if (ret)
		return ret;

	ret = ttm_bo_device_init(&cirrus->ttm.bdev,
				 cirrus->ttm.bo_global_ref.ref.object,
				 &cirrus_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,
			     cirrus->mc.vram_size >> PAGE_SHIFT);
	if (ret) {
		DRM_ERROR("Failed ttm VRAM init: %d\n", ret);
		return ret;
	}

	cirrus->fb_mtrr = drm_mtrr_add(pci_resource_start(dev->pdev, 0),
				    pci_resource_len(dev->pdev, 0),
				    DRM_MTRR_WC);

	cirrus->mm_inited = true;
	return 0;
}

void cirrus_mm_fini(struct cirrus_device *cirrus)
{
	struct drm_device *dev = cirrus->dev;

	if (!cirrus->mm_inited)
		return;

	ttm_bo_device_release(&cirrus->ttm.bdev);

	cirrus_ttm_global_release(cirrus);

	if (cirrus->fb_mtrr >= 0) {
		drm_mtrr_del(cirrus->fb_mtrr,
			     pci_resource_start(dev->pdev, 0),
			     pci_resource_len(dev->pdev, 0), DRM_MTRR_WC);
		cirrus->fb_mtrr = -1;
	}
}

void cirrus_ttm_placement(struct cirrus_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 cirrus_bo_reserve(struct cirrus_bo *bo, bool no_wait)
{
	int ret;

	ret = ttm_bo_reserve(&bo->bo, true, no_wait, false, 0);
	if (ret) {
		if (ret != -ERESTARTSYS)
			DRM_ERROR("reserve failed %p\n", bo);
		return ret;
	}
	return 0;
}

void cirrus_bo_unreserve(struct cirrus_bo *bo)
{
	ttm_bo_unreserve(&bo->bo);
}

int cirrus_bo_create(struct drm_device *dev, int size, int align,
		  uint32_t flags, struct cirrus_bo **pcirrusbo)
{
	struct cirrus_device *cirrus = dev->dev_private;
	struct cirrus_bo *cirrusbo;
	size_t acc_size;
	int ret;

	cirrusbo = kzalloc(sizeof(struct cirrus_bo), GFP_KERNEL);
	if (!cirrusbo)
		return -ENOMEM;

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

	cirrusbo->gem.driver_private = NULL;
	cirrusbo->bo.bdev = &cirrus->ttm.bdev;

	cirrus_ttm_placement(cirrusbo, TTM_PL_FLAG_VRAM | TTM_PL_FLAG_SYSTEM);

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

	ret = ttm_bo_init(&cirrus->ttm.bdev, &cirrusbo->bo, size,
			  ttm_bo_type_device, &cirrusbo->placement,
			  align >> PAGE_SHIFT, 0, false, NULL, acc_size,
			  NULL, cirrus_bo_ttm_destroy);
	if (ret)
		return ret;

	*pcirrusbo = cirrusbo;
	return 0;
}

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

int cirrus_bo_pin(struct cirrus_bo *bo, u32 pl_flag, u64 *gpu_addr)
{
	int i, ret;

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

	cirrus_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, false);
	if (ret)
		return ret;

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

int cirrus_bo_unpin(struct cirrus_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, false);
	if (ret)
		return ret;

	return 0;
}

int cirrus_bo_push_sysram(struct cirrus_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);

	cirrus_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, false);
	if (ret) {
		DRM_ERROR("pushing to VRAM failed\n");
		return ret;
	}
	return 0;
}

int cirrus_mmap(struct file *filp, struct vm_area_struct *vma)
{
	struct drm_file *file_priv;
	struct cirrus_device *cirrus;

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

	file_priv = filp->private_data;
	cirrus = file_priv->minor->dev->dev_private;
	return ttm_bo_mmap(filp, vma, &cirrus->ttm.bdev);
}
Commit	Line	Data
f9aa76a8 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>
f9aa76a8 DA	29	#include "cirrus_drv.h"
	30	#include <ttm/ttm_page_alloc.h>
	31
	32	static inline struct cirrus_device *
	33	cirrus_bdev(struct ttm_bo_device *bd)
	34	{
	35	return container_of(bd, struct cirrus_device, ttm.bdev);
	36	}
	37
	38	static int
	39	cirrus_ttm_mem_global_init(struct drm_global_reference *ref)
	40	{
	41	return ttm_mem_global_init(ref->object);
	42	}
	43
	44	static void
	45	cirrus_ttm_mem_global_release(struct drm_global_reference *ref)
	46	{
	47	ttm_mem_global_release(ref->object);
	48	}
	49
	50	static int cirrus_ttm_global_init(struct cirrus_device *cirrus)
	51	{
	52	struct drm_global_reference *global_ref;
	53	int r;
	54
	55	global_ref = &cirrus->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 = &cirrus_ttm_mem_global_init;
	59	global_ref->release = &cirrus_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	cirrus->ttm.bo_global_ref.mem_glob =
	68	cirrus->ttm.mem_global_ref.object;
	69	global_ref = &cirrus->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(&cirrus->ttm.mem_global_ref);
	78	return r;
	79	}
	80	return 0;
	81	}
	82
	83	void
	84	cirrus_ttm_global_release(struct cirrus_device *cirrus)
	85	{
	86	if (cirrus->ttm.mem_global_ref.release == NULL)
	87	return;
	88
	89	drm_global_item_unref(&cirrus->ttm.bo_global_ref.ref);
	90	drm_global_item_unref(&cirrus->ttm.mem_global_ref);
	91	cirrus->ttm.mem_global_ref.release = NULL;
	92	}
93
94
95	static void cirrus_bo_ttm_destroy(struct ttm_buffer_object *tbo)
96	{
97	struct cirrus_bo *bo;
98
99	bo = container_of(tbo, struct cirrus_bo, bo);
100
101	drm_gem_object_release(&bo->gem);
102	kfree(bo);
103	}
104
105	bool cirrus_ttm_bo_is_cirrus_bo(struct ttm_buffer_object *bo)
106	{
107	if (bo->destroy == &cirrus_bo_ttm_destroy)
108	return true;
109	return false;
110	}
111
112	static int
113	cirrus_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	cirrus_bo_evict_flags(struct ttm_buffer_object bo, struct ttm_placement pl)
139	{
140	struct cirrus_bo *cirrusbo = cirrus_bo(bo);
141
142	if (!cirrus_ttm_bo_is_cirrus_bo(bo))
143	return;
144
145	cirrus_ttm_placement(cirrusbo, TTM_PL_FLAG_SYSTEM);
146	*pl = cirrusbo->placement;
147	}
148
149	static int cirrus_bo_verify_access(struct ttm_buffer_object bo, struct file filp)
150	{
151	return 0;
152	}
153
154	static int cirrus_ttm_io_mem_reserve(struct ttm_bo_device *bdev,
155	struct ttm_mem_reg *mem)
156	{
157	struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
158	struct cirrus_device *cirrus = cirrus_bdev(bdev);
159
160	mem->bus.addr = NULL;
161	mem->bus.offset = 0;
162	mem->bus.size = mem->num_pages << PAGE_SHIFT;
163	mem->bus.base = 0;
164	mem->bus.is_iomem = false;
165	if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
166	return -EINVAL;
167	switch (mem->mem_type) {
168	case TTM_PL_SYSTEM:
169	/* system memory */
170	return 0;
171	case TTM_PL_VRAM:
172	mem->bus.offset = mem->start << PAGE_SHIFT;
173	mem->bus.base = pci_resource_start(cirrus->dev->pdev, 0);
174	mem->bus.is_iomem = true;
175	break;
176	default:
177	return -EINVAL;
178	break;
179	}
180	return 0;
181	}
182
183	static void cirrus_ttm_io_mem_free(struct ttm_bo_device bdev, struct ttm_mem_reg mem)
184	{
185	}
186
187	static int cirrus_bo_move(struct ttm_buffer_object *bo,
188	bool evict, bool interruptible,
189	bool no_wait_reserve, bool no_wait_gpu,
190	struct ttm_mem_reg *new_mem)
191	{
192	int r;
193	r = ttm_bo_move_memcpy(bo, evict, no_wait_reserve, no_wait_gpu, new_mem);
194	return r;
195	}
196
197
198	static void cirrus_ttm_backend_destroy(struct ttm_tt *tt)
199	{
200	ttm_tt_fini(tt);
201	kfree(tt);
202	}
203
204	static struct ttm_backend_func cirrus_tt_backend_func = {
205	.destroy = &cirrus_ttm_backend_destroy,
206	};
207
208
209	struct ttm_tt cirrus_ttm_tt_create(struct ttm_bo_device bdev,
210	unsigned long size, uint32_t page_flags,
211	struct page *dummy_read_page)
212	{
213	struct ttm_tt *tt;
214
215	tt = kzalloc(sizeof(struct ttm_tt), GFP_KERNEL);
216	if (tt == NULL)
217	return NULL;
218	tt->func = &cirrus_tt_backend_func;
219	if (ttm_tt_init(tt, bdev, size, page_flags, dummy_read_page)) {
220	kfree(tt);
221	return NULL;
222	}
223	return tt;
224	}
225
226	static int cirrus_ttm_tt_populate(struct ttm_tt *ttm)
227	{
228	return ttm_pool_populate(ttm);
229	}
230
231	static void cirrus_ttm_tt_unpopulate(struct ttm_tt *ttm)
232	{
233	ttm_pool_unpopulate(ttm);
234	}
235
236	struct ttm_bo_driver cirrus_bo_driver = {
237	.ttm_tt_create = cirrus_ttm_tt_create,
238	.ttm_tt_populate = cirrus_ttm_tt_populate,
239	.ttm_tt_unpopulate = cirrus_ttm_tt_unpopulate,
240	.init_mem_type = cirrus_bo_init_mem_type,
241	.evict_flags = cirrus_bo_evict_flags,
242	.move = cirrus_bo_move,
243	.verify_access = cirrus_bo_verify_access,
244	.io_mem_reserve = &cirrus_ttm_io_mem_reserve,
245	.io_mem_free = &cirrus_ttm_io_mem_free,
246	};
247
248	int cirrus_mm_init(struct cirrus_device *cirrus)
249	{
250	int ret;
251	struct drm_device *dev = cirrus->dev;
252	struct ttm_bo_device *bdev = &cirrus->ttm.bdev;
253
254	ret = cirrus_ttm_global_init(cirrus);
255	if (ret)
256	return ret;
257
258	ret = ttm_bo_device_init(&cirrus->ttm.bdev,
259	cirrus->ttm.bo_global_ref.ref.object,
260	&cirrus_bo_driver, DRM_FILE_PAGE_OFFSET,
261	true);
262	if (ret) {
263	DRM_ERROR("Error initialising bo driver; %d\n", ret);
264	return ret;
265	}
266
267	ret = ttm_bo_init_mm(bdev, TTM_PL_VRAM,
268	cirrus->mc.vram_size >> PAGE_SHIFT);
269	if (ret) {
270	DRM_ERROR("Failed ttm VRAM init: %d\n", ret);
271	return ret;
272	}
273
274	cirrus->fb_mtrr = drm_mtrr_add(pci_resource_start(dev->pdev, 0),
275	pci_resource_len(dev->pdev, 0),
276	DRM_MTRR_WC);
277
93b4cc56	278	cirrus->mm_inited = true;
f9aa76a8 DA	279	return 0;
	280	}
	281
	282	void cirrus_mm_fini(struct cirrus_device *cirrus)
	283	{
	284	struct drm_device *dev = cirrus->dev;
93b4cc56 DA	285
	286	if (!cirrus->mm_inited)
	287	return;
	288
f9aa76a8 DA	289	ttm_bo_device_release(&cirrus->ttm.bdev);
	290
	291	cirrus_ttm_global_release(cirrus);
	292
	293	if (cirrus->fb_mtrr >= 0) {
	294	drm_mtrr_del(cirrus->fb_mtrr,
	295	pci_resource_start(dev->pdev, 0),
	296	pci_resource_len(dev->pdev, 0), DRM_MTRR_WC);
	297	cirrus->fb_mtrr = -1;
	298	}
	299	}
	300
	301	void cirrus_ttm_placement(struct cirrus_bo *bo, int domain)
	302	{
	303	u32 c = 0;
	304	bo->placement.fpfn = 0;
	305	bo->placement.lpfn = 0;
	306	bo->placement.placement = bo->placements;
	307	bo->placement.busy_placement = bo->placements;
	308	if (domain & TTM_PL_FLAG_VRAM)
	309	bo->placements[c++] = TTM_PL_FLAG_WC \| TTM_PL_FLAG_UNCACHED \| TTM_PL_FLAG_VRAM;
	310	if (domain & TTM_PL_FLAG_SYSTEM)
	311	bo->placements[c++] = TTM_PL_MASK_CACHING \| TTM_PL_FLAG_SYSTEM;
	312	if (!c)
	313	bo->placements[c++] = TTM_PL_MASK_CACHING \| TTM_PL_FLAG_SYSTEM;
	314	bo->placement.num_placement = c;
	315	bo->placement.num_busy_placement = c;
	316	}
	317
	318	int cirrus_bo_reserve(struct cirrus_bo *bo, bool no_wait)
	319	{
	320	int ret;
	321
	322	ret = ttm_bo_reserve(&bo->bo, true, no_wait, false, 0);
	323	if (ret) {
	324	if (ret != -ERESTARTSYS)
	325	DRM_ERROR("reserve failed %p\n", bo);
	326	return ret;
	327	}
	328	return 0;
	329	}
	330
	331	void cirrus_bo_unreserve(struct cirrus_bo *bo)
	332	{
	333	ttm_bo_unreserve(&bo->bo);
	334	}
	335
	336	int cirrus_bo_create(struct drm_device *dev, int size, int align,
	337	uint32_t flags, struct cirrus_bo **pcirrusbo)
	338	{
	339	struct cirrus_device *cirrus = dev->dev_private;
	340	struct cirrus_bo *cirrusbo;
	341	size_t acc_size;
	342	int ret;
	343
	344	cirrusbo = kzalloc(sizeof(struct cirrus_bo), GFP_KERNEL);
	345	if (!cirrusbo)
	346	return -ENOMEM;
	347
	348	ret = drm_gem_object_init(dev, &cirrusbo->gem, size);
	349	if (ret) {
	350	kfree(cirrusbo);
	351	return ret;
	352	}
353
354	cirrusbo->gem.driver_private = NULL;
355	cirrusbo->bo.bdev = &cirrus->ttm.bdev;
356
357	cirrus_ttm_placement(cirrusbo, TTM_PL_FLAG_VRAM \| TTM_PL_FLAG_SYSTEM);
358
359	acc_size = ttm_bo_dma_acc_size(&cirrus->ttm.bdev, size,
360	sizeof(struct cirrus_bo));
361
362	ret = ttm_bo_init(&cirrus->ttm.bdev, &cirrusbo->bo, size,
363	ttm_bo_type_device, &cirrusbo->placement,
364	align >> PAGE_SHIFT, 0, false, NULL, acc_size,
5288b7b2	365	NULL, cirrus_bo_ttm_destroy);
f9aa76a8 DA	366	if (ret)
	367	return ret;
	368
	369	*pcirrusbo = cirrusbo;
	370	return 0;
	371	}
	372
	373	static inline u64 cirrus_bo_gpu_offset(struct cirrus_bo *bo)
	374	{
	375	return bo->bo.offset;
	376	}
	377
	378	int cirrus_bo_pin(struct cirrus_bo bo, u32 pl_flag, u64 gpu_addr)
	379	{
	380	int i, ret;
	381
	382	if (bo->pin_count) {
	383	bo->pin_count++;
	384	if (gpu_addr)
	385	*gpu_addr = cirrus_bo_gpu_offset(bo);
	386	}
	387
	388	cirrus_ttm_placement(bo, pl_flag);
	389	for (i = 0; i < bo->placement.num_placement; i++)
	390	bo->placements[i] \|= TTM_PL_FLAG_NO_EVICT;
	391	ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false, false);
	392	if (ret)
	393	return ret;
	394
	395	bo->pin_count = 1;
	396	if (gpu_addr)
	397	*gpu_addr = cirrus_bo_gpu_offset(bo);
	398	return 0;
	399	}
	400
	401	int cirrus_bo_unpin(struct cirrus_bo *bo)
	402	{
	403	int i, ret;
	404	if (!bo->pin_count) {
	405	DRM_ERROR("unpin bad %p\n", bo);
	406	return 0;
	407	}
	408	bo->pin_count--;
	409	if (bo->pin_count)
	410	return 0;
	411
	412	for (i = 0; i < bo->placement.num_placement ; i++)
	413	bo->placements[i] &= ~TTM_PL_FLAG_NO_EVICT;
	414	ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false, false);
	415	if (ret)
	416	return ret;
	417
	418	return 0;
	419	}
	420
	421	int cirrus_bo_push_sysram(struct cirrus_bo *bo)
	422	{
	423	int i, ret;
	424	if (!bo->pin_count) {
	425	DRM_ERROR("unpin bad %p\n", bo);
	426	return 0;
	427	}
	428	bo->pin_count--;
	429	if (bo->pin_count)
430	return 0;
431
432	if (bo->kmap.virtual)
433	ttm_bo_kunmap(&bo->kmap);
434
435	cirrus_ttm_placement(bo, TTM_PL_FLAG_SYSTEM);
436	for (i = 0; i < bo->placement.num_placement ; i++)
437	bo->placements[i] \|= TTM_PL_FLAG_NO_EVICT;
438
439	ret = ttm_bo_validate(&bo->bo, &bo->placement, false, false, false);
440	if (ret) {
441	DRM_ERROR("pushing to VRAM failed\n");
442	return ret;
443	}
444	return 0;
445	}
446
447	int cirrus_mmap(struct file filp, struct vm_area_struct vma)
448	{
449	struct drm_file *file_priv;
450	struct cirrus_device *cirrus;
451
452	if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
453	return drm_mmap(filp, vma);
454
455	file_priv = filp->private_data;
456	cirrus = file_priv->minor->dev->dev_private;
457	return ttm_bo_mmap(filp, vma, &cirrus->ttm.bdev);
458	}