WebSVN – Kolibri OS – Diff – /drivers/video/drm/ttm/ttm_bo_util.c


/**************************************************************************
 *
 * Copyright (c) 2007-2009 VMware, Inc., Palo Alto, CA., USA
 * All Rights Reserved.
 *
 * 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 above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 *
 * 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.
 *
 **************************************************************************/
/*
 * Authors: Thomas Hellstrom 
 */
 
#include 
#include 
#include 
#include 
//#include 
#include 
#include 
#include 
#include 
 
#define __pgprot(x)     ((pgprot_t) { (x) } )
 
 
 
 
void ttm_bo_free_old_node(struct ttm_buffer_object *bo)
{
	ttm_bo_mem_put(bo, &bo->mem);
}
 
int ttm_bo_move_ttm(struct ttm_buffer_object *bo,
		    bool evict,
		    bool no_wait_gpu, struct ttm_mem_reg *new_mem)
{
	struct ttm_tt *ttm = bo->ttm;
	struct ttm_mem_reg *old_mem = &bo->mem;
	int ret;
 
	if (old_mem->mem_type != TTM_PL_SYSTEM) {
		ttm_tt_unbind(ttm);
		ttm_bo_free_old_node(bo);
		ttm_flag_masked(&old_mem->placement, TTM_PL_FLAG_SYSTEM,
				TTM_PL_MASK_MEM);
		old_mem->mem_type = TTM_PL_SYSTEM;
	}
 
	ret = ttm_tt_set_placement_caching(ttm, new_mem->placement);
	if (unlikely(ret != 0))
		return ret;
 
	if (new_mem->mem_type != TTM_PL_SYSTEM) {
		ret = ttm_tt_bind(ttm, new_mem);
		if (unlikely(ret != 0))
			return ret;
	}
 
	*old_mem = *new_mem;
	new_mem->mm_node = NULL;
 
	return 0;
}
EXPORT_SYMBOL(ttm_bo_move_ttm);
 
int ttm_mem_io_lock(struct ttm_mem_type_manager *man, bool interruptible)
{
	if (likely(man->io_reserve_fastpath))
		return 0;
 
	if (interruptible)
		return mutex_lock_interruptible(&man->io_reserve_mutex);
 
	mutex_lock(&man->io_reserve_mutex);
	return 0;
}
EXPORT_SYMBOL(ttm_mem_io_lock);
 
void ttm_mem_io_unlock(struct ttm_mem_type_manager *man)
{
	if (likely(man->io_reserve_fastpath))
		return;
 
	mutex_unlock(&man->io_reserve_mutex);
}
EXPORT_SYMBOL(ttm_mem_io_unlock);
 
static int ttm_mem_io_evict(struct ttm_mem_type_manager *man)
{
	struct ttm_buffer_object *bo;
 
	if (!man->use_io_reserve_lru || list_empty(&man->io_reserve_lru))
		return -EAGAIN;
 
	bo = list_first_entry(&man->io_reserve_lru,
			      struct ttm_buffer_object,
			      io_reserve_lru);
	list_del_init(&bo->io_reserve_lru);
	ttm_bo_unmap_virtual_locked(bo);
 
	return 0;
}
 
 
int ttm_mem_io_reserve(struct ttm_bo_device *bdev,
		       struct ttm_mem_reg *mem)
{
	struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
	int ret = 0;
 
	if (!bdev->driver->io_mem_reserve)
		return 0;
	if (likely(man->io_reserve_fastpath))
		return bdev->driver->io_mem_reserve(bdev, mem);
 
	if (bdev->driver->io_mem_reserve &&
	    mem->bus.io_reserved_count++ == 0) {
retry:
		ret = bdev->driver->io_mem_reserve(bdev, mem);
		if (ret == -EAGAIN) {
			ret = ttm_mem_io_evict(man);
			if (ret == 0)
				goto retry;
		}
	}
	return ret;
}
EXPORT_SYMBOL(ttm_mem_io_reserve);
 
void ttm_mem_io_free(struct ttm_bo_device *bdev,
		     struct ttm_mem_reg *mem)
{
	struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
 
	if (likely(man->io_reserve_fastpath))
		return;
 
	if (bdev->driver->io_mem_reserve &&
	    --mem->bus.io_reserved_count == 0 &&
	    bdev->driver->io_mem_free)
		bdev->driver->io_mem_free(bdev, mem);
 
}
EXPORT_SYMBOL(ttm_mem_io_free);
 
int ttm_mem_io_reserve_vm(struct ttm_buffer_object *bo)
{
	struct ttm_mem_reg *mem = &bo->mem;
	int ret;
 
	if (!mem->bus.io_reserved_vm) {
		struct ttm_mem_type_manager *man =
			&bo->bdev->man[mem->mem_type];
 
		ret = ttm_mem_io_reserve(bo->bdev, mem);
		if (unlikely(ret != 0))
			return ret;
		mem->bus.io_reserved_vm = true;
		if (man->use_io_reserve_lru)
			list_add_tail(&bo->io_reserve_lru,
				      &man->io_reserve_lru);
	}
	return 0;
}
 
void ttm_mem_io_free_vm(struct ttm_buffer_object *bo)
{
	struct ttm_mem_reg *mem = &bo->mem;
 
	if (mem->bus.io_reserved_vm) {
		mem->bus.io_reserved_vm = false;
		list_del_init(&bo->io_reserve_lru);
		ttm_mem_io_free(bo->bdev, mem);
	}
}
 
static int ttm_mem_reg_ioremap(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem,
			void **virtual)
{
	struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
	int ret;
	void *addr;
 
	*virtual = NULL;
	(void) ttm_mem_io_lock(man, false);
	ret = ttm_mem_io_reserve(bdev, mem);
	ttm_mem_io_unlock(man);
	if (ret || !mem->bus.is_iomem)
		return ret;
 
	if (mem->bus.addr) {
		addr = mem->bus.addr;
	} else {
		if (mem->placement & TTM_PL_FLAG_WC)
			addr = ioremap_wc(mem->bus.base + mem->bus.offset, mem->bus.size);
		else
			addr = ioremap_nocache(mem->bus.base + mem->bus.offset, mem->bus.size);
		if (!addr) {
			(void) ttm_mem_io_lock(man, false);
			ttm_mem_io_free(bdev, mem);
			ttm_mem_io_unlock(man);
			return -ENOMEM;
		}
	}
	*virtual = addr;
	return 0;
}
 
static void ttm_mem_reg_iounmap(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem,
			 void *virtual)
{
	struct ttm_mem_type_manager *man;
 
	man = &bdev->man[mem->mem_type];
 
	if (virtual && mem->bus.addr == NULL)
		iounmap(virtual);
	(void) ttm_mem_io_lock(man, false);
	ttm_mem_io_free(bdev, mem);
	ttm_mem_io_unlock(man);
}
 
static int ttm_copy_io_page(void *dst, void *src, unsigned long page)
{
	uint32_t *dstP =
	    (uint32_t *) ((unsigned long)dst + (page << PAGE_SHIFT));
	uint32_t *srcP =
	    (uint32_t *) ((unsigned long)src + (page << PAGE_SHIFT));
 
	int i;
	for (i = 0; i < PAGE_SIZE / sizeof(uint32_t); ++i)
		iowrite32(ioread32(srcP++), dstP++);
	return 0;
}
 
static int ttm_copy_io_ttm_page(struct ttm_tt *ttm, void *src,
				unsigned long page,
				pgprot_t prot)
{
	struct page *d = ttm->pages[page];
	void *dst;
 
	if (!d)
		return -ENOMEM;
 
	src = (void *)((unsigned long)src + (page << PAGE_SHIFT));
 
    dst = (void*)MapIoMem((addr_t)d, 4096, PG_SW);
 
	if (!dst)
		return -ENOMEM;
 
    memcpy(dst, src, PAGE_SIZE);
 
    FreeKernelSpace(dst);
 
	return 0;
}
 
static int ttm_copy_ttm_io_page(struct ttm_tt *ttm, void *dst,
				unsigned long page,
				pgprot_t prot)
{
	struct page *s = ttm->pages[page];
	void *src;
 
	if (!s)
		return -ENOMEM;
 
	dst = (void *)((unsigned long)dst + (page << PAGE_SHIFT));
 
    src = (void*)MapIoMem((addr_t)s, 4096, PG_SW);
 
	if (!src)
		return -ENOMEM;
 
    memcpy(dst, src, PAGE_SIZE);
 
    FreeKernelSpace(src);
 
	return 0;
}
 
int ttm_bo_move_memcpy(struct ttm_buffer_object *bo,
		       bool evict, bool no_wait_gpu,
		       struct ttm_mem_reg *new_mem)
{
	struct ttm_bo_device *bdev = bo->bdev;
	struct ttm_mem_type_manager *man = &bdev->man[new_mem->mem_type];
	struct ttm_tt *ttm = bo->ttm;
	struct ttm_mem_reg *old_mem = &bo->mem;
	struct ttm_mem_reg old_copy = *old_mem;
	void *old_iomap;
	void *new_iomap;
	int ret;
	unsigned long i;
	unsigned long page;
	unsigned long add = 0;
	int dir;
 
	ret = ttm_mem_reg_ioremap(bdev, old_mem, &old_iomap);
	if (ret)
		return ret;
	ret = ttm_mem_reg_ioremap(bdev, new_mem, &new_iomap);
	if (ret)
		goto out;
 
	/*
	 * Single TTM move. NOP.
	 */
	if (old_iomap == NULL && new_iomap == NULL)
		goto out2;
 
	/*
	 * Don't move nonexistent data. Clear destination instead.
	 */
	if (old_iomap == NULL &&
	    (ttm == NULL || (ttm->state == tt_unpopulated &&
			     !(ttm->page_flags & TTM_PAGE_FLAG_SWAPPED)))) {
        memset(new_iomap, 0, new_mem->num_pages*PAGE_SIZE);
		goto out2;
	}
 
	/*
	 * TTM might be null for moves within the same region.
	 */
	if (ttm && ttm->state == tt_unpopulated) {
		ret = ttm->bdev->driver->ttm_tt_populate(ttm);
		if (ret)
			goto out1;
	}
 
	add = 0;
	dir = 1;
 
	if ((old_mem->mem_type == new_mem->mem_type) &&
	    (new_mem->start < old_mem->start + old_mem->size)) {
		dir = -1;
		add = new_mem->num_pages - 1;
	}
 
	for (i = 0; i < new_mem->num_pages; ++i) {
		page = i * dir + add;
		if (old_iomap == NULL) {
			pgprot_t prot = ttm_io_prot(old_mem->placement,
						    PAGE_KERNEL);
			ret = ttm_copy_ttm_io_page(ttm, new_iomap, page,
						   prot);
		} else if (new_iomap == NULL) {
			pgprot_t prot = ttm_io_prot(new_mem->placement,
						    PAGE_KERNEL);
			ret = ttm_copy_io_ttm_page(ttm, old_iomap, page,
						   prot);
		} else
			ret = ttm_copy_io_page(new_iomap, old_iomap, page);
		if (ret)
			goto out1;
	}
	mb();
out2:
	old_copy = *old_mem;
	*old_mem = *new_mem;
	new_mem->mm_node = NULL;
 
	if ((man->flags & TTM_MEMTYPE_FLAG_FIXED) && (ttm != NULL)) {
		ttm_tt_unbind(ttm);
		ttm_tt_destroy(ttm);
		bo->ttm = NULL;
	}
 
out1:
	ttm_mem_reg_iounmap(bdev, old_mem, new_iomap);
out:
	ttm_mem_reg_iounmap(bdev, &old_copy, old_iomap);
 
	/*
	 * On error, keep the mm node!
	 */
	if (!ret)
		ttm_bo_mem_put(bo, &old_copy);
	return ret;
}
EXPORT_SYMBOL(ttm_bo_move_memcpy);
 
static void ttm_transfered_destroy(struct ttm_buffer_object *bo)
{
	kfree(bo);
}
 
/**
 * ttm_buffer_object_transfer
 *
 * @bo: A pointer to a struct ttm_buffer_object.
 * @new_obj: A pointer to a pointer to a newly created ttm_buffer_object,
 * holding the data of @bo with the old placement.
 *
 * This is a utility function that may be called after an accelerated move
 * has been scheduled. A new buffer object is created as a placeholder for
 * the old data while it's being copied. When that buffer object is idle,
 * it can be destroyed, releasing the space of the old placement.
 * Returns:
 * !0: Failure.
 */
 
static int ttm_buffer_object_transfer(struct ttm_buffer_object *bo,
				      struct ttm_buffer_object **new_obj)
{
	struct ttm_buffer_object *fbo;
	int ret;
 
	fbo = kmalloc(sizeof(*fbo), GFP_KERNEL);
	if (!fbo)
		return -ENOMEM;
 
	*fbo = *bo;
 
	/**
	 * Fix up members that we shouldn't copy directly:
	 * TODO: Explicit member copy would probably be better here.
	 */
 
	INIT_LIST_HEAD(&fbo->ddestroy);
	INIT_LIST_HEAD(&fbo->lru);
	INIT_LIST_HEAD(&fbo->swap);
	INIT_LIST_HEAD(&fbo->io_reserve_lru);
	drm_vma_node_reset(&fbo->vma_node);
	atomic_set(&fbo->cpu_writers, 0);
 
	kref_init(&fbo->list_kref);
	kref_init(&fbo->kref);
	fbo->destroy = &ttm_transfered_destroy;
	fbo->acc_size = 0;
	fbo->resv = &fbo->ttm_resv;
	reservation_object_init(fbo->resv);
	ret = ww_mutex_trylock(&fbo->resv->lock);
	WARN_ON(!ret);
 
	*new_obj = fbo;
	return 0;
}
 
pgprot_t ttm_io_prot(uint32_t caching_flags, pgprot_t tmp)
{
	/* Cached mappings need no adjustment */
	if (caching_flags & TTM_PL_FLAG_CACHED)
		return tmp;
	return tmp;
}
EXPORT_SYMBOL(ttm_io_prot);
 
static int ttm_bo_ioremap(struct ttm_buffer_object *bo,
			  unsigned long offset,
			  unsigned long size,
			  struct ttm_bo_kmap_obj *map)
{
	struct ttm_mem_reg *mem = &bo->mem;
 
	if (bo->mem.bus.addr) {
		map->bo_kmap_type = ttm_bo_map_premapped;
		map->virtual = (void *)(((u8 *)bo->mem.bus.addr) + offset);
	} else {
		map->bo_kmap_type = ttm_bo_map_iomap;
		if (mem->placement & TTM_PL_FLAG_WC)
			map->virtual = ioremap_wc(bo->mem.bus.base + bo->mem.bus.offset + offset,
						  size);
		else
			map->virtual = ioremap_nocache(bo->mem.bus.base + bo->mem.bus.offset + offset,
						       size);
	}
	return (!map->virtual) ? -ENOMEM : 0;
}
 
static int ttm_bo_kmap_ttm(struct ttm_buffer_object *bo,
			   unsigned long start_page,
			   unsigned long num_pages,
			   struct ttm_bo_kmap_obj *map)
{
	struct ttm_mem_reg *mem = &bo->mem; pgprot_t prot;
	struct ttm_tt *ttm = bo->ttm;
	int ret;
 
	BUG_ON(!ttm);
 
	if (ttm->state == tt_unpopulated) {
		ret = ttm->bdev->driver->ttm_tt_populate(ttm);
		if (ret)
			return ret;
	}
 
	if (num_pages == 1 && (mem->placement & TTM_PL_FLAG_CACHED)) {
		/*
		 * We're mapping a single page, and the desired
		 * page protection is consistent with the bo.
		 */
 
		map->bo_kmap_type = ttm_bo_map_kmap;
		map->page = ttm->pages[start_page];
		map->virtual = kmap(map->page);
	} else {
		/*
		 * We need to use vmap to get the desired page protection
		 * or to make the buffer object look contiguous.
		 */
		prot = ttm_io_prot(mem->placement, PAGE_KERNEL);
		map->bo_kmap_type = ttm_bo_map_vmap;
		map->virtual = vmap(ttm->pages + start_page, num_pages,
				    0, prot);
	}
	return (!map->virtual) ? -ENOMEM : 0;
}
 
int ttm_bo_kmap(struct ttm_buffer_object *bo,
		unsigned long start_page, unsigned long num_pages,
		struct ttm_bo_kmap_obj *map)
{
	struct ttm_mem_type_manager *man =
		&bo->bdev->man[bo->mem.mem_type];
	unsigned long offset, size;
	int ret;
 
	BUG_ON(!list_empty(&bo->swap));
	map->virtual = NULL;
	map->bo = bo;
	if (num_pages > bo->num_pages)
		return -EINVAL;
	if (start_page > bo->num_pages)
		return -EINVAL;
#if 0
	if (num_pages > 1 && !capable(CAP_SYS_ADMIN))
		return -EPERM;
#endif
	(void) ttm_mem_io_lock(man, false);
	ret = ttm_mem_io_reserve(bo->bdev, &bo->mem);
	ttm_mem_io_unlock(man);
	if (ret)
		return ret;
	if (!bo->mem.bus.is_iomem) {
		return ttm_bo_kmap_ttm(bo, start_page, num_pages, map);
	} else {
		offset = start_page << PAGE_SHIFT;
		size = num_pages << PAGE_SHIFT;
		return ttm_bo_ioremap(bo, offset, size, map);
	}
}
EXPORT_SYMBOL(ttm_bo_kmap);
 
void ttm_bo_kunmap(struct ttm_bo_kmap_obj *map)
{
	struct ttm_buffer_object *bo = map->bo;
	struct ttm_mem_type_manager *man =
		&bo->bdev->man[bo->mem.mem_type];
 
	if (!map->virtual)
		return;
	switch (map->bo_kmap_type) {
	case ttm_bo_map_iomap:
		iounmap(map->virtual);
		break;
	case ttm_bo_map_vmap:
		vunmap(map->virtual);
		break;
	case ttm_bo_map_kmap:
		kunmap(map->page);
		break;
	case ttm_bo_map_premapped:
		break;
	default:
		BUG();
	}
	(void) ttm_mem_io_lock(man, false);
	ttm_mem_io_free(map->bo->bdev, &map->bo->mem);
	ttm_mem_io_unlock(man);
	map->virtual = NULL;
	map->page = NULL;
}
EXPORT_SYMBOL(ttm_bo_kunmap);
 
int ttm_bo_move_accel_cleanup(struct ttm_buffer_object *bo,
			      struct fence *fence,
			      bool evict,
			      bool no_wait_gpu,
			      struct ttm_mem_reg *new_mem)
{
	struct ttm_bo_device *bdev = bo->bdev;
	struct ttm_mem_type_manager *man = &bdev->man[new_mem->mem_type];
	struct ttm_mem_reg *old_mem = &bo->mem;
	int ret;
	struct ttm_buffer_object *ghost_obj;
 
	reservation_object_add_excl_fence(bo->resv, fence);
	if (evict) {
		ret = ttm_bo_wait(bo, false, false, false);
		if (ret)
			return ret;
 
		if ((man->flags & TTM_MEMTYPE_FLAG_FIXED) &&
		    (bo->ttm != NULL)) {
			ttm_tt_unbind(bo->ttm);
			ttm_tt_destroy(bo->ttm);
			bo->ttm = NULL;
		}
		ttm_bo_free_old_node(bo);
	} else {
		/**
		 * This should help pipeline ordinary buffer moves.
		 *
		 * Hang old buffer memory on a new buffer object,
		 * and leave it to be released when the GPU
		 * operation has completed.
		 */
 
		set_bit(TTM_BO_PRIV_FLAG_MOVING, &bo->priv_flags);
 
		ret = ttm_buffer_object_transfer(bo, &ghost_obj);
		if (ret)
			return ret;
 
		reservation_object_add_excl_fence(ghost_obj->resv, fence);
 
		/**
		 * If we're not moving to fixed memory, the TTM object
		 * needs to stay alive. Otherwhise hang it on the ghost
		 * bo to be unbound and destroyed.
		 */
 
		if (!(man->flags & TTM_MEMTYPE_FLAG_FIXED))
			ghost_obj->ttm = NULL;
		else
			bo->ttm = NULL;
 
		ttm_bo_unreserve(ghost_obj);
		ttm_bo_unref(&ghost_obj);
	}
 
	*old_mem = *new_mem;
	new_mem->mm_node = NULL;
 
	return 0;
}
EXPORT_SYMBOL(ttm_bo_move_accel_cleanup);
 
 
void *vmap(struct page **pages, unsigned int count,
           unsigned long flags, pgprot_t prot)
{
    void *vaddr;
    char *tmp;
    int i;
 
    vaddr = AllocKernelSpace(count << 12);
    if(vaddr == NULL)
        return NULL;
 
    for(i = 0, tmp = vaddr; i < count; i++)
    {
        MapPage(tmp, page_to_phys(pages[i]), PG_SW);
        tmp+= 4096;
    };
 
    return vaddr;
};
 
void vunmap(const void *addr)
{
    FreeKernelSpace((void*)addr);
}

Rev 6938	Rev 7146
1	/**************************************************************************	1	/**************************************************************************
2	*	2	*
3	* Copyright (c) 2007-2009 VMware, Inc., Palo Alto, CA., USA	3	* Copyright (c) 2007-2009 VMware, Inc., Palo Alto, CA., USA
4	* All Rights Reserved.	4	* All Rights Reserved.
5	*	5	*
6	* Permission is hereby granted, free of charge, to any person obtaining a	6	* Permission is hereby granted, free of charge, to any person obtaining a
7	* copy of this software and associated documentation files (the	7	* copy of this software and associated documentation files (the
8	* "Software"), to deal in the Software without restriction, including	8	* "Software"), to deal in the Software without restriction, including
9	* without limitation the rights to use, copy, modify, merge, publish,	9	* without limitation the rights to use, copy, modify, merge, publish,
10	* distribute, sub license, and/or sell copies of the Software, and to	10	* distribute, sub license, and/or sell copies of the Software, and to
11	* permit persons to whom the Software is furnished to do so, subject to	11	* permit persons to whom the Software is furnished to do so, subject to
12	* the following conditions:	12	* the following conditions:
13	*	13	*
14	* The above copyright notice and this permission notice (including the	14	* The above copyright notice and this permission notice (including the
15	* next paragraph) shall be included in all copies or substantial portions	15	* next paragraph) shall be included in all copies or substantial portions
16	* of the Software.	16	* of the Software.
17	*	17	*
18	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR	18	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,	19	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20	* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL	20	* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
21	* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,	21	* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
22	* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR	22	* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
23	* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE	23	* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
24	* USE OR OTHER DEALINGS IN THE SOFTWARE.	24	* USE OR OTHER DEALINGS IN THE SOFTWARE.
25	*	25	*
26	**************************************************************************/	26	**************************************************************************/
27	/*	27	/*
28	* Authors: Thomas Hellstrom	28	* Authors: Thomas Hellstrom
29	*/	29	*/
30		30
31	#include	31	#include
32	#include	32	#include
33	#include	33	#include
34	#include	34	#include
35	//#include	35	//#include
36	#include	36	#include
37	#include	37	#include
38	#include	38	#include
39	#include	39	#include
40		40
41	#define __pgprot(x) ((pgprot_t) { (x) } )	41	#define __pgprot(x) ((pgprot_t) { (x) } )
42		-
43	void vmap(struct page *pages, unsigned int count,	-
44	unsigned long flags, pgprot_t prot);	42
45		43
46	void ttm_bo_free_old_node(struct ttm_buffer_object *bo)	44	void ttm_bo_free_old_node(struct ttm_buffer_object *bo)
47	{	45	{
48	ttm_bo_mem_put(bo, &bo->mem);	46	ttm_bo_mem_put(bo, &bo->mem);
49	}	47	}
50		48
51	int ttm_bo_move_ttm(struct ttm_buffer_object *bo,	49	int ttm_bo_move_ttm(struct ttm_buffer_object *bo,
52	bool evict,	50	bool evict,
53	bool no_wait_gpu, struct ttm_mem_reg *new_mem)	51	bool no_wait_gpu, struct ttm_mem_reg *new_mem)
54	{	52	{
55	struct ttm_tt *ttm = bo->ttm;	53	struct ttm_tt *ttm = bo->ttm;
56	struct ttm_mem_reg *old_mem = &bo->mem;	54	struct ttm_mem_reg *old_mem = &bo->mem;
57	int ret;	55	int ret;
58		56
59	if (old_mem->mem_type != TTM_PL_SYSTEM) {	57	if (old_mem->mem_type != TTM_PL_SYSTEM) {
60	ttm_tt_unbind(ttm);	58	ttm_tt_unbind(ttm);
61	ttm_bo_free_old_node(bo);	59	ttm_bo_free_old_node(bo);
62	ttm_flag_masked(&old_mem->placement, TTM_PL_FLAG_SYSTEM,	60	ttm_flag_masked(&old_mem->placement, TTM_PL_FLAG_SYSTEM,
63	TTM_PL_MASK_MEM);	61	TTM_PL_MASK_MEM);
64	old_mem->mem_type = TTM_PL_SYSTEM;	62	old_mem->mem_type = TTM_PL_SYSTEM;
65	}	63	}
66		64
67	ret = ttm_tt_set_placement_caching(ttm, new_mem->placement);	65	ret = ttm_tt_set_placement_caching(ttm, new_mem->placement);
68	if (unlikely(ret != 0))	66	if (unlikely(ret != 0))
69	return ret;	67	return ret;
70		68
71	if (new_mem->mem_type != TTM_PL_SYSTEM) {	69	if (new_mem->mem_type != TTM_PL_SYSTEM) {
72	ret = ttm_tt_bind(ttm, new_mem);	70	ret = ttm_tt_bind(ttm, new_mem);
73	if (unlikely(ret != 0))	71	if (unlikely(ret != 0))
74	return ret;	72	return ret;
75	}	73	}
76		74
77	old_mem = new_mem;	75	old_mem = new_mem;
78	new_mem->mm_node = NULL;	76	new_mem->mm_node = NULL;
79		77
80	return 0;	78	return 0;
81	}	79	}
82	EXPORT_SYMBOL(ttm_bo_move_ttm);	80	EXPORT_SYMBOL(ttm_bo_move_ttm);
83		81
84	int ttm_mem_io_lock(struct ttm_mem_type_manager *man, bool interruptible)	82	int ttm_mem_io_lock(struct ttm_mem_type_manager *man, bool interruptible)
85	{	83	{
86	if (likely(man->io_reserve_fastpath))	84	if (likely(man->io_reserve_fastpath))
87	return 0;	85	return 0;
88		86
89	if (interruptible)	87	if (interruptible)
90	return mutex_lock_interruptible(&man->io_reserve_mutex);	88	return mutex_lock_interruptible(&man->io_reserve_mutex);
91		89
92	mutex_lock(&man->io_reserve_mutex);	90	mutex_lock(&man->io_reserve_mutex);
93	return 0;	91	return 0;
94	}	92	}
95	EXPORT_SYMBOL(ttm_mem_io_lock);	93	EXPORT_SYMBOL(ttm_mem_io_lock);
96		94
97	void ttm_mem_io_unlock(struct ttm_mem_type_manager *man)	95	void ttm_mem_io_unlock(struct ttm_mem_type_manager *man)
98	{	96	{
99	if (likely(man->io_reserve_fastpath))	97	if (likely(man->io_reserve_fastpath))
100	return;	98	return;
101		99
102	mutex_unlock(&man->io_reserve_mutex);	100	mutex_unlock(&man->io_reserve_mutex);
103	}	101	}
104	EXPORT_SYMBOL(ttm_mem_io_unlock);	102	EXPORT_SYMBOL(ttm_mem_io_unlock);
105		103
106	static int ttm_mem_io_evict(struct ttm_mem_type_manager *man)	104	static int ttm_mem_io_evict(struct ttm_mem_type_manager *man)
107	{	105	{
108	struct ttm_buffer_object *bo;	106	struct ttm_buffer_object *bo;
109		107
110	if (!man->use_io_reserve_lru \|\| list_empty(&man->io_reserve_lru))	108	if (!man->use_io_reserve_lru \|\| list_empty(&man->io_reserve_lru))
111	return -EAGAIN;	109	return -EAGAIN;
112		110
113	bo = list_first_entry(&man->io_reserve_lru,	111	bo = list_first_entry(&man->io_reserve_lru,
114	struct ttm_buffer_object,	112	struct ttm_buffer_object,
115	io_reserve_lru);	113	io_reserve_lru);
116	list_del_init(&bo->io_reserve_lru);	114	list_del_init(&bo->io_reserve_lru);
117	ttm_bo_unmap_virtual_locked(bo);	115	ttm_bo_unmap_virtual_locked(bo);
118		116
119	return 0;	117	return 0;
120	}	118	}
121		119
122		120
123	int ttm_mem_io_reserve(struct ttm_bo_device *bdev,	121	int ttm_mem_io_reserve(struct ttm_bo_device *bdev,
124	struct ttm_mem_reg *mem)	122	struct ttm_mem_reg *mem)
125	{	123	{
126	struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];	124	struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
127	int ret = 0;	125	int ret = 0;
128		126
129	if (!bdev->driver->io_mem_reserve)	127	if (!bdev->driver->io_mem_reserve)
130	return 0;	128	return 0;
131	if (likely(man->io_reserve_fastpath))	129	if (likely(man->io_reserve_fastpath))
132	return bdev->driver->io_mem_reserve(bdev, mem);	130	return bdev->driver->io_mem_reserve(bdev, mem);
133		131
134	if (bdev->driver->io_mem_reserve &&	132	if (bdev->driver->io_mem_reserve &&
135	mem->bus.io_reserved_count++ == 0) {	133	mem->bus.io_reserved_count++ == 0) {
136	retry:	134	retry:
137	ret = bdev->driver->io_mem_reserve(bdev, mem);	135	ret = bdev->driver->io_mem_reserve(bdev, mem);
138	if (ret == -EAGAIN) {	136	if (ret == -EAGAIN) {
139	ret = ttm_mem_io_evict(man);	137	ret = ttm_mem_io_evict(man);
140	if (ret == 0)	138	if (ret == 0)
141	goto retry;	139	goto retry;
142	}	140	}
143	}	141	}
144	return ret;	142	return ret;
145	}	143	}
146	EXPORT_SYMBOL(ttm_mem_io_reserve);	144	EXPORT_SYMBOL(ttm_mem_io_reserve);
147		145
148	void ttm_mem_io_free(struct ttm_bo_device *bdev,	146	void ttm_mem_io_free(struct ttm_bo_device *bdev,
149	struct ttm_mem_reg *mem)	147	struct ttm_mem_reg *mem)
150	{	148	{
151	struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];	149	struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
152		150
153	if (likely(man->io_reserve_fastpath))	151	if (likely(man->io_reserve_fastpath))
154	return;	152	return;
155		153
156	if (bdev->driver->io_mem_reserve &&	154	if (bdev->driver->io_mem_reserve &&
157	--mem->bus.io_reserved_count == 0 &&	155	--mem->bus.io_reserved_count == 0 &&
158	bdev->driver->io_mem_free)	156	bdev->driver->io_mem_free)
159	bdev->driver->io_mem_free(bdev, mem);	157	bdev->driver->io_mem_free(bdev, mem);
160		158
161	}	159	}
162	EXPORT_SYMBOL(ttm_mem_io_free);	160	EXPORT_SYMBOL(ttm_mem_io_free);
163		161
164	int ttm_mem_io_reserve_vm(struct ttm_buffer_object *bo)	162	int ttm_mem_io_reserve_vm(struct ttm_buffer_object *bo)
165	{	163	{
166	struct ttm_mem_reg *mem = &bo->mem;	164	struct ttm_mem_reg *mem = &bo->mem;
167	int ret;	165	int ret;
168		166
169	if (!mem->bus.io_reserved_vm) {	167	if (!mem->bus.io_reserved_vm) {
170	struct ttm_mem_type_manager *man =	168	struct ttm_mem_type_manager *man =
171	&bo->bdev->man[mem->mem_type];	169	&bo->bdev->man[mem->mem_type];
172		170
173	ret = ttm_mem_io_reserve(bo->bdev, mem);	171	ret = ttm_mem_io_reserve(bo->bdev, mem);
174	if (unlikely(ret != 0))	172	if (unlikely(ret != 0))
175	return ret;	173	return ret;
176	mem->bus.io_reserved_vm = true;	174	mem->bus.io_reserved_vm = true;
177	if (man->use_io_reserve_lru)	175	if (man->use_io_reserve_lru)
178	list_add_tail(&bo->io_reserve_lru,	176	list_add_tail(&bo->io_reserve_lru,
179	&man->io_reserve_lru);	177	&man->io_reserve_lru);
180	}	178	}
181	return 0;	179	return 0;
182	}	180	}
183		181
184	void ttm_mem_io_free_vm(struct ttm_buffer_object *bo)	182	void ttm_mem_io_free_vm(struct ttm_buffer_object *bo)
185	{	183	{
186	struct ttm_mem_reg *mem = &bo->mem;	184	struct ttm_mem_reg *mem = &bo->mem;
187		185
188	if (mem->bus.io_reserved_vm) {	186	if (mem->bus.io_reserved_vm) {
189	mem->bus.io_reserved_vm = false;	187	mem->bus.io_reserved_vm = false;
190	list_del_init(&bo->io_reserve_lru);	188	list_del_init(&bo->io_reserve_lru);
191	ttm_mem_io_free(bo->bdev, mem);	189	ttm_mem_io_free(bo->bdev, mem);
192	}	190	}
193	}	191	}
194		192
195	static int ttm_mem_reg_ioremap(struct ttm_bo_device bdev, struct ttm_mem_reg mem,	193	static int ttm_mem_reg_ioremap(struct ttm_bo_device bdev, struct ttm_mem_reg mem,
196	void **virtual)	194	void **virtual)
197	{	195	{
198	struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];	196	struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
199	int ret;	197	int ret;
200	void *addr;	198	void *addr;
201		199
202	*virtual = NULL;	200	*virtual = NULL;
203	(void) ttm_mem_io_lock(man, false);	201	(void) ttm_mem_io_lock(man, false);
204	ret = ttm_mem_io_reserve(bdev, mem);	202	ret = ttm_mem_io_reserve(bdev, mem);
205	ttm_mem_io_unlock(man);	203	ttm_mem_io_unlock(man);
206	if (ret \|\| !mem->bus.is_iomem)	204	if (ret \|\| !mem->bus.is_iomem)
207	return ret;	205	return ret;
208		206
209	if (mem->bus.addr) {	207	if (mem->bus.addr) {
210	addr = mem->bus.addr;	208	addr = mem->bus.addr;
211	} else {	209	} else {
212	if (mem->placement & TTM_PL_FLAG_WC)	210	if (mem->placement & TTM_PL_FLAG_WC)
213	addr = ioremap_wc(mem->bus.base + mem->bus.offset, mem->bus.size);	211	addr = ioremap_wc(mem->bus.base + mem->bus.offset, mem->bus.size);
214	else	212	else
215	addr = ioremap_nocache(mem->bus.base + mem->bus.offset, mem->bus.size);	213	addr = ioremap_nocache(mem->bus.base + mem->bus.offset, mem->bus.size);
216	if (!addr) {	214	if (!addr) {
217	(void) ttm_mem_io_lock(man, false);	215	(void) ttm_mem_io_lock(man, false);
218	ttm_mem_io_free(bdev, mem);	216	ttm_mem_io_free(bdev, mem);
219	ttm_mem_io_unlock(man);	217	ttm_mem_io_unlock(man);
220	return -ENOMEM;	218	return -ENOMEM;
221	}	219	}
222	}	220	}
223	*virtual = addr;	221	*virtual = addr;
224	return 0;	222	return 0;
225	}	223	}
226		224
227	static void ttm_mem_reg_iounmap(struct ttm_bo_device bdev, struct ttm_mem_reg mem,	225	static void ttm_mem_reg_iounmap(struct ttm_bo_device bdev, struct ttm_mem_reg mem,
228	void *virtual)	226	void *virtual)
229	{	227	{
230	struct ttm_mem_type_manager *man;	228	struct ttm_mem_type_manager *man;
231		229
232	man = &bdev->man[mem->mem_type];	230	man = &bdev->man[mem->mem_type];
233		231
234	if (virtual && mem->bus.addr == NULL)	232	if (virtual && mem->bus.addr == NULL)
235	iounmap(virtual);	233	iounmap(virtual);
236	(void) ttm_mem_io_lock(man, false);	234	(void) ttm_mem_io_lock(man, false);
237	ttm_mem_io_free(bdev, mem);	235	ttm_mem_io_free(bdev, mem);
238	ttm_mem_io_unlock(man);	236	ttm_mem_io_unlock(man);
239	}	237	}
240		238
241	static int ttm_copy_io_page(void dst, void src, unsigned long page)	239	static int ttm_copy_io_page(void dst, void src, unsigned long page)
242	{	240	{
243	uint32_t *dstP =	241	uint32_t *dstP =
244	(uint32_t *) ((unsigned long)dst + (page << PAGE_SHIFT));	242	(uint32_t *) ((unsigned long)dst + (page << PAGE_SHIFT));
245	uint32_t *srcP =	243	uint32_t *srcP =
246	(uint32_t *) ((unsigned long)src + (page << PAGE_SHIFT));	244	(uint32_t *) ((unsigned long)src + (page << PAGE_SHIFT));
247		245
248	int i;	246	int i;
249	for (i = 0; i < PAGE_SIZE / sizeof(uint32_t); ++i)	247	for (i = 0; i < PAGE_SIZE / sizeof(uint32_t); ++i)
250	iowrite32(ioread32(srcP++), dstP++);	248	iowrite32(ioread32(srcP++), dstP++);
251	return 0;	249	return 0;
252	}	250	}
253		251
254	static int ttm_copy_io_ttm_page(struct ttm_tt ttm, void src,	252	static int ttm_copy_io_ttm_page(struct ttm_tt ttm, void src,
255	unsigned long page,	253	unsigned long page,
256	pgprot_t prot)	254	pgprot_t prot)
257	{	255	{
258	struct page *d = ttm->pages[page];	256	struct page *d = ttm->pages[page];
259	void *dst;	257	void *dst;
260		258
261	if (!d)	259	if (!d)
262	return -ENOMEM;	260	return -ENOMEM;
263		261
264	src = (void *)((unsigned long)src + (page << PAGE_SHIFT));	262	src = (void *)((unsigned long)src + (page << PAGE_SHIFT));
265		263
266	dst = (void*)MapIoMem((addr_t)d, 4096, PG_SW);	264	dst = (void*)MapIoMem((addr_t)d, 4096, PG_SW);
267		265
268	if (!dst)	266	if (!dst)
269	return -ENOMEM;	267	return -ENOMEM;
270		268
271	memcpy(dst, src, PAGE_SIZE);	269	memcpy(dst, src, PAGE_SIZE);
272		270
273	FreeKernelSpace(dst);	271	FreeKernelSpace(dst);
274		272
275	return 0;	273	return 0;
276	}	274	}
277		275
278	static int ttm_copy_ttm_io_page(struct ttm_tt ttm, void dst,	276	static int ttm_copy_ttm_io_page(struct ttm_tt ttm, void dst,
279	unsigned long page,	277	unsigned long page,
280	pgprot_t prot)	278	pgprot_t prot)
281	{	279	{
282	struct page *s = ttm->pages[page];	280	struct page *s = ttm->pages[page];
283	void *src;	281	void *src;
284		282
285	if (!s)	283	if (!s)
286	return -ENOMEM;	284	return -ENOMEM;
287		285
288	dst = (void *)((unsigned long)dst + (page << PAGE_SHIFT));	286	dst = (void *)((unsigned long)dst + (page << PAGE_SHIFT));
289		287
290	src = (void*)MapIoMem((addr_t)s, 4096, PG_SW);	288	src = (void*)MapIoMem((addr_t)s, 4096, PG_SW);
291		289
292	if (!src)	290	if (!src)
293	return -ENOMEM;	291	return -ENOMEM;
294		292
295	memcpy(dst, src, PAGE_SIZE);	293	memcpy(dst, src, PAGE_SIZE);
296		294
297	FreeKernelSpace(src);	295	FreeKernelSpace(src);
298		296
299	return 0;	297	return 0;
300	}	298	}
301		299
302	int ttm_bo_move_memcpy(struct ttm_buffer_object *bo,	300	int ttm_bo_move_memcpy(struct ttm_buffer_object *bo,
303	bool evict, bool no_wait_gpu,	301	bool evict, bool no_wait_gpu,
304	struct ttm_mem_reg *new_mem)	302	struct ttm_mem_reg *new_mem)
305	{	303	{
306	struct ttm_bo_device *bdev = bo->bdev;	304	struct ttm_bo_device *bdev = bo->bdev;
307	struct ttm_mem_type_manager *man = &bdev->man[new_mem->mem_type];	305	struct ttm_mem_type_manager *man = &bdev->man[new_mem->mem_type];
308	struct ttm_tt *ttm = bo->ttm;	306	struct ttm_tt *ttm = bo->ttm;
309	struct ttm_mem_reg *old_mem = &bo->mem;	307	struct ttm_mem_reg *old_mem = &bo->mem;
310	struct ttm_mem_reg old_copy = *old_mem;	308	struct ttm_mem_reg old_copy = *old_mem;
311	void *old_iomap;	309	void *old_iomap;
312	void *new_iomap;	310	void *new_iomap;
313	int ret;	311	int ret;
314	unsigned long i;	312	unsigned long i;
315	unsigned long page;	313	unsigned long page;
316	unsigned long add = 0;	314	unsigned long add = 0;
317	int dir;	315	int dir;
318		316
319	ret = ttm_mem_reg_ioremap(bdev, old_mem, &old_iomap);	317	ret = ttm_mem_reg_ioremap(bdev, old_mem, &old_iomap);
320	if (ret)	318	if (ret)
321	return ret;	319	return ret;
322	ret = ttm_mem_reg_ioremap(bdev, new_mem, &new_iomap);	320	ret = ttm_mem_reg_ioremap(bdev, new_mem, &new_iomap);
323	if (ret)	321	if (ret)
324	goto out;	322	goto out;
325		323
326	/*	324	/*
327	* Single TTM move. NOP.	325	* Single TTM move. NOP.
328	*/	326	*/
329	if (old_iomap == NULL && new_iomap == NULL)	327	if (old_iomap == NULL && new_iomap == NULL)
330	goto out2;	328	goto out2;
331		329
332	/*	330	/*
333	* Don't move nonexistent data. Clear destination instead.	331	* Don't move nonexistent data. Clear destination instead.
334	*/	332	*/
335	if (old_iomap == NULL &&	333	if (old_iomap == NULL &&
336	(ttm == NULL \|\| (ttm->state == tt_unpopulated &&	334	(ttm == NULL \|\| (ttm->state == tt_unpopulated &&
337	!(ttm->page_flags & TTM_PAGE_FLAG_SWAPPED)))) {	335	!(ttm->page_flags & TTM_PAGE_FLAG_SWAPPED)))) {
338	memset(new_iomap, 0, new_mem->num_pages*PAGE_SIZE);	336	memset(new_iomap, 0, new_mem->num_pages*PAGE_SIZE);
339	goto out2;	337	goto out2;
340	}	338	}
341		339
342	/*	340	/*
343	* TTM might be null for moves within the same region.	341	* TTM might be null for moves within the same region.
344	*/	342	*/
345	if (ttm && ttm->state == tt_unpopulated) {	343	if (ttm && ttm->state == tt_unpopulated) {
346	ret = ttm->bdev->driver->ttm_tt_populate(ttm);	344	ret = ttm->bdev->driver->ttm_tt_populate(ttm);
347	if (ret)	345	if (ret)
348	goto out1;	346	goto out1;
349	}	347	}
350		348
351	add = 0;	349	add = 0;
352	dir = 1;	350	dir = 1;
353		351
354	if ((old_mem->mem_type == new_mem->mem_type) &&	352	if ((old_mem->mem_type == new_mem->mem_type) &&
355	(new_mem->start < old_mem->start + old_mem->size)) {	353	(new_mem->start < old_mem->start + old_mem->size)) {
356	dir = -1;	354	dir = -1;
357	add = new_mem->num_pages - 1;	355	add = new_mem->num_pages - 1;
358	}	356	}
359		357
360	for (i = 0; i < new_mem->num_pages; ++i) {	358	for (i = 0; i < new_mem->num_pages; ++i) {
361	page = i * dir + add;	359	page = i * dir + add;
362	if (old_iomap == NULL) {	360	if (old_iomap == NULL) {
363	pgprot_t prot = ttm_io_prot(old_mem->placement,	361	pgprot_t prot = ttm_io_prot(old_mem->placement,
364	PAGE_KERNEL);	362	PAGE_KERNEL);
365	ret = ttm_copy_ttm_io_page(ttm, new_iomap, page,	363	ret = ttm_copy_ttm_io_page(ttm, new_iomap, page,
366	prot);	364	prot);
367	} else if (new_iomap == NULL) {	365	} else if (new_iomap == NULL) {
368	pgprot_t prot = ttm_io_prot(new_mem->placement,	366	pgprot_t prot = ttm_io_prot(new_mem->placement,
369	PAGE_KERNEL);	367	PAGE_KERNEL);
370	ret = ttm_copy_io_ttm_page(ttm, old_iomap, page,	368	ret = ttm_copy_io_ttm_page(ttm, old_iomap, page,
371	prot);	369	prot);
372	} else	370	} else
373	ret = ttm_copy_io_page(new_iomap, old_iomap, page);	371	ret = ttm_copy_io_page(new_iomap, old_iomap, page);
374	if (ret)	372	if (ret)
375	goto out1;	373	goto out1;
376	}	374	}
377	mb();	375	mb();
378	out2:	376	out2:
379	old_copy = *old_mem;	377	old_copy = *old_mem;
380	old_mem = new_mem;	378	old_mem = new_mem;
381	new_mem->mm_node = NULL;	379	new_mem->mm_node = NULL;
382		380
383	if ((man->flags & TTM_MEMTYPE_FLAG_FIXED) && (ttm != NULL)) {	381	if ((man->flags & TTM_MEMTYPE_FLAG_FIXED) && (ttm != NULL)) {
384	ttm_tt_unbind(ttm);	382	ttm_tt_unbind(ttm);
385	ttm_tt_destroy(ttm);	383	ttm_tt_destroy(ttm);
386	bo->ttm = NULL;	384	bo->ttm = NULL;
387	}	385	}
388		386
389	out1:	387	out1:
390	ttm_mem_reg_iounmap(bdev, old_mem, new_iomap);	388	ttm_mem_reg_iounmap(bdev, old_mem, new_iomap);
391	out:	389	out:
392	ttm_mem_reg_iounmap(bdev, &old_copy, old_iomap);	390	ttm_mem_reg_iounmap(bdev, &old_copy, old_iomap);
393		391
394	/*	392	/*
395	* On error, keep the mm node!	393	* On error, keep the mm node!
396	*/	394	*/
397	if (!ret)	395	if (!ret)
398	ttm_bo_mem_put(bo, &old_copy);	396	ttm_bo_mem_put(bo, &old_copy);
399	return ret;	397	return ret;
400	}	398	}
401	EXPORT_SYMBOL(ttm_bo_move_memcpy);	399	EXPORT_SYMBOL(ttm_bo_move_memcpy);
402		400
403	static void ttm_transfered_destroy(struct ttm_buffer_object *bo)	401	static void ttm_transfered_destroy(struct ttm_buffer_object *bo)
404	{	402	{
405	kfree(bo);	403	kfree(bo);
406	}	404	}
407		405
408	/**	406	/**
409	* ttm_buffer_object_transfer	407	* ttm_buffer_object_transfer
410	*	408	*
411	* @bo: A pointer to a struct ttm_buffer_object.	409	* @bo: A pointer to a struct ttm_buffer_object.
412	* @new_obj: A pointer to a pointer to a newly created ttm_buffer_object,	410	* @new_obj: A pointer to a pointer to a newly created ttm_buffer_object,
413	* holding the data of @bo with the old placement.	411	* holding the data of @bo with the old placement.
414	*	412	*
415	* This is a utility function that may be called after an accelerated move	413	* This is a utility function that may be called after an accelerated move
416	* has been scheduled. A new buffer object is created as a placeholder for	414	* has been scheduled. A new buffer object is created as a placeholder for
417	* the old data while it's being copied. When that buffer object is idle,	415	* the old data while it's being copied. When that buffer object is idle,
418	* it can be destroyed, releasing the space of the old placement.	416	* it can be destroyed, releasing the space of the old placement.
419	* Returns:	417	* Returns:
420	* !0: Failure.	418	* !0: Failure.
421	*/	419	*/
422		420
423	static int ttm_buffer_object_transfer(struct ttm_buffer_object *bo,	421	static int ttm_buffer_object_transfer(struct ttm_buffer_object *bo,
424	struct ttm_buffer_object **new_obj)	422	struct ttm_buffer_object **new_obj)
425	{	423	{
426	struct ttm_buffer_object *fbo;	424	struct ttm_buffer_object *fbo;
427	int ret;	425	int ret;
428		426
429	fbo = kmalloc(sizeof(*fbo), GFP_KERNEL);	427	fbo = kmalloc(sizeof(*fbo), GFP_KERNEL);
430	if (!fbo)	428	if (!fbo)
431	return -ENOMEM;	429	return -ENOMEM;
432		430
433	fbo = bo;	431	fbo = bo;
434		432
435	/**	433	/**
436	* Fix up members that we shouldn't copy directly:	434	* Fix up members that we shouldn't copy directly:
437	* TODO: Explicit member copy would probably be better here.	435	* TODO: Explicit member copy would probably be better here.
438	*/	436	*/
439		437
440	INIT_LIST_HEAD(&fbo->ddestroy);	438	INIT_LIST_HEAD(&fbo->ddestroy);
441	INIT_LIST_HEAD(&fbo->lru);	439	INIT_LIST_HEAD(&fbo->lru);
442	INIT_LIST_HEAD(&fbo->swap);	440	INIT_LIST_HEAD(&fbo->swap);
443	INIT_LIST_HEAD(&fbo->io_reserve_lru);	441	INIT_LIST_HEAD(&fbo->io_reserve_lru);
444	drm_vma_node_reset(&fbo->vma_node);	442	drm_vma_node_reset(&fbo->vma_node);
445	atomic_set(&fbo->cpu_writers, 0);	443	atomic_set(&fbo->cpu_writers, 0);
446		444
447	kref_init(&fbo->list_kref);	445	kref_init(&fbo->list_kref);
448	kref_init(&fbo->kref);	446	kref_init(&fbo->kref);
449	fbo->destroy = &ttm_transfered_destroy;	447	fbo->destroy = &ttm_transfered_destroy;
450	fbo->acc_size = 0;	448	fbo->acc_size = 0;
451	fbo->resv = &fbo->ttm_resv;	449	fbo->resv = &fbo->ttm_resv;
452	reservation_object_init(fbo->resv);	450	reservation_object_init(fbo->resv);
453	ret = ww_mutex_trylock(&fbo->resv->lock);	451	ret = ww_mutex_trylock(&fbo->resv->lock);
454	WARN_ON(!ret);	452	WARN_ON(!ret);
455		453
456	*new_obj = fbo;	454	*new_obj = fbo;
457	return 0;	455	return 0;
458	}	456	}
459		457
460	pgprot_t ttm_io_prot(uint32_t caching_flags, pgprot_t tmp)	458	pgprot_t ttm_io_prot(uint32_t caching_flags, pgprot_t tmp)
461	{	459	{
462	/* Cached mappings need no adjustment */	460	/* Cached mappings need no adjustment */
463	if (caching_flags & TTM_PL_FLAG_CACHED)	461	if (caching_flags & TTM_PL_FLAG_CACHED)
464	return tmp;	462	return tmp;
465	return tmp;	463	return tmp;
466	}	464	}
467	EXPORT_SYMBOL(ttm_io_prot);	465	EXPORT_SYMBOL(ttm_io_prot);
468		466
469	static int ttm_bo_ioremap(struct ttm_buffer_object *bo,	467	static int ttm_bo_ioremap(struct ttm_buffer_object *bo,
470	unsigned long offset,	468	unsigned long offset,
471	unsigned long size,	469	unsigned long size,
472	struct ttm_bo_kmap_obj *map)	470	struct ttm_bo_kmap_obj *map)
473	{	471	{
474	struct ttm_mem_reg *mem = &bo->mem;	472	struct ttm_mem_reg *mem = &bo->mem;
475		473
476	if (bo->mem.bus.addr) {	474	if (bo->mem.bus.addr) {
477	map->bo_kmap_type = ttm_bo_map_premapped;	475	map->bo_kmap_type = ttm_bo_map_premapped;
478	map->virtual = (void )(((u8 )bo->mem.bus.addr) + offset);	476	map->virtual = (void )(((u8 )bo->mem.bus.addr) + offset);
479	} else {	477	} else {
480	map->bo_kmap_type = ttm_bo_map_iomap;	478	map->bo_kmap_type = ttm_bo_map_iomap;
481	if (mem->placement & TTM_PL_FLAG_WC)	479	if (mem->placement & TTM_PL_FLAG_WC)
482	map->virtual = ioremap_wc(bo->mem.bus.base + bo->mem.bus.offset + offset,	480	map->virtual = ioremap_wc(bo->mem.bus.base + bo->mem.bus.offset + offset,
483	size);	481	size);
484	else	482	else
485	map->virtual = ioremap_nocache(bo->mem.bus.base + bo->mem.bus.offset + offset,	483	map->virtual = ioremap_nocache(bo->mem.bus.base + bo->mem.bus.offset + offset,
486	size);	484	size);
487	}	485	}
488	return (!map->virtual) ? -ENOMEM : 0;	486	return (!map->virtual) ? -ENOMEM : 0;
489	}	487	}
490		488
491	static int ttm_bo_kmap_ttm(struct ttm_buffer_object *bo,	489	static int ttm_bo_kmap_ttm(struct ttm_buffer_object *bo,
492	unsigned long start_page,	490	unsigned long start_page,
493	unsigned long num_pages,	491	unsigned long num_pages,
494	struct ttm_bo_kmap_obj *map)	492	struct ttm_bo_kmap_obj *map)
495	{	493	{
496	struct ttm_mem_reg *mem = &bo->mem; pgprot_t prot;	494	struct ttm_mem_reg *mem = &bo->mem; pgprot_t prot;
497	struct ttm_tt *ttm = bo->ttm;	495	struct ttm_tt *ttm = bo->ttm;
498	int ret;	496	int ret;
499		497
500	BUG_ON(!ttm);	498	BUG_ON(!ttm);

Subversion Repositories Kolibri OS

(root)/drivers/video/drm/ttm/ttm_bo_util.c – Rev 6938 → 7146