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 *vmap(struct page **pages, unsigned int count,
           unsigned long flags, pgprot_t prot);
 
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:
		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;
};

Rev 6296	Rev 6938
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	#define iowrite32(v, addr) writel((v), (addr))	-
31	#define ioread32(addr) readl(addr)	-
32		30
33	#include	31	#include
34	#include	32	#include
35	#include	33	#include
36	#include	34	#include
37	//#include	35	//#include
38	#include	36	#include
39	#include	37	#include
40	#include	38	#include
41	#include	39	#include
42		40
43	#define __pgprot(x) ((pgprot_t) { (x) } )	41	#define __pgprot(x) ((pgprot_t) { (x) } )
44		42
45	void vmap(struct page *pages, unsigned int count,	43	void vmap(struct page *pages, unsigned int count,
46	unsigned long flags, pgprot_t prot);	44	unsigned long flags, pgprot_t prot);
47		45
48	void ttm_bo_free_old_node(struct ttm_buffer_object *bo)	46	void ttm_bo_free_old_node(struct ttm_buffer_object *bo)
49	{	47	{
50	ttm_bo_mem_put(bo, &bo->mem);	48	ttm_bo_mem_put(bo, &bo->mem);
51	}	49	}
52		50
53	int ttm_bo_move_ttm(struct ttm_buffer_object *bo,	51	int ttm_bo_move_ttm(struct ttm_buffer_object *bo,
54	bool evict,	52	bool evict,
55	bool no_wait_gpu, struct ttm_mem_reg *new_mem)	53	bool no_wait_gpu, struct ttm_mem_reg *new_mem)
56	{	54	{
57	struct ttm_tt *ttm = bo->ttm;	55	struct ttm_tt *ttm = bo->ttm;
58	struct ttm_mem_reg *old_mem = &bo->mem;	56	struct ttm_mem_reg *old_mem = &bo->mem;
59	int ret;	57	int ret;
60		58
61	if (old_mem->mem_type != TTM_PL_SYSTEM) {	59	if (old_mem->mem_type != TTM_PL_SYSTEM) {
62	ttm_tt_unbind(ttm);	60	ttm_tt_unbind(ttm);
63	ttm_bo_free_old_node(bo);	61	ttm_bo_free_old_node(bo);
64	ttm_flag_masked(&old_mem->placement, TTM_PL_FLAG_SYSTEM,	62	ttm_flag_masked(&old_mem->placement, TTM_PL_FLAG_SYSTEM,
65	TTM_PL_MASK_MEM);	63	TTM_PL_MASK_MEM);
66	old_mem->mem_type = TTM_PL_SYSTEM;	64	old_mem->mem_type = TTM_PL_SYSTEM;
67	}	65	}
68		66
69	ret = ttm_tt_set_placement_caching(ttm, new_mem->placement);	67	ret = ttm_tt_set_placement_caching(ttm, new_mem->placement);
70	if (unlikely(ret != 0))	68	if (unlikely(ret != 0))
71	return ret;	69	return ret;
72		70
73	if (new_mem->mem_type != TTM_PL_SYSTEM) {	71	if (new_mem->mem_type != TTM_PL_SYSTEM) {
74	ret = ttm_tt_bind(ttm, new_mem);	72	ret = ttm_tt_bind(ttm, new_mem);
75	if (unlikely(ret != 0))	73	if (unlikely(ret != 0))
76	return ret;	74	return ret;
77	}	75	}
78		76
79	old_mem = new_mem;	77	old_mem = new_mem;
80	new_mem->mm_node = NULL;	78	new_mem->mm_node = NULL;
81		79
82	return 0;	80	return 0;
83	}	81	}
84	EXPORT_SYMBOL(ttm_bo_move_ttm);	82	EXPORT_SYMBOL(ttm_bo_move_ttm);
85		83
86	int ttm_mem_io_lock(struct ttm_mem_type_manager *man, bool interruptible)	84	int ttm_mem_io_lock(struct ttm_mem_type_manager *man, bool interruptible)
87	{	85	{
88	if (likely(man->io_reserve_fastpath))	86	if (likely(man->io_reserve_fastpath))
89	return 0;	87	return 0;
90		88
91	if (interruptible)	89	if (interruptible)
92	return mutex_lock_interruptible(&man->io_reserve_mutex);	90	return mutex_lock_interruptible(&man->io_reserve_mutex);
93		91
94	mutex_lock(&man->io_reserve_mutex);	92	mutex_lock(&man->io_reserve_mutex);
95	return 0;	93	return 0;
96	}	94	}
97	EXPORT_SYMBOL(ttm_mem_io_lock);	95	EXPORT_SYMBOL(ttm_mem_io_lock);
98		96
99	void ttm_mem_io_unlock(struct ttm_mem_type_manager *man)	97	void ttm_mem_io_unlock(struct ttm_mem_type_manager *man)
100	{	98	{
101	if (likely(man->io_reserve_fastpath))	99	if (likely(man->io_reserve_fastpath))
102	return;	100	return;
103		101
104	mutex_unlock(&man->io_reserve_mutex);	102	mutex_unlock(&man->io_reserve_mutex);
105	}	103	}
106	EXPORT_SYMBOL(ttm_mem_io_unlock);	104	EXPORT_SYMBOL(ttm_mem_io_unlock);
107		105
108	static int ttm_mem_io_evict(struct ttm_mem_type_manager *man)	106	static int ttm_mem_io_evict(struct ttm_mem_type_manager *man)
109	{	107	{
110	struct ttm_buffer_object *bo;	108	struct ttm_buffer_object *bo;
111		109
112	if (!man->use_io_reserve_lru \|\| list_empty(&man->io_reserve_lru))	110	if (!man->use_io_reserve_lru \|\| list_empty(&man->io_reserve_lru))
113	return -EAGAIN;	111	return -EAGAIN;
114		112
115	bo = list_first_entry(&man->io_reserve_lru,	113	bo = list_first_entry(&man->io_reserve_lru,
116	struct ttm_buffer_object,	114	struct ttm_buffer_object,
117	io_reserve_lru);	115	io_reserve_lru);
118	list_del_init(&bo->io_reserve_lru);	116	list_del_init(&bo->io_reserve_lru);
119	ttm_bo_unmap_virtual_locked(bo);	117	ttm_bo_unmap_virtual_locked(bo);
120		118
121	return 0;	119	return 0;
122	}	120	}
123		121
124		122
125	int ttm_mem_io_reserve(struct ttm_bo_device *bdev,	123	int ttm_mem_io_reserve(struct ttm_bo_device *bdev,
126	struct ttm_mem_reg *mem)	124	struct ttm_mem_reg *mem)
127	{	125	{
128	struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];	126	struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
129	int ret = 0;	127	int ret = 0;
130		128
131	if (!bdev->driver->io_mem_reserve)	129	if (!bdev->driver->io_mem_reserve)
132	return 0;	130	return 0;
133	if (likely(man->io_reserve_fastpath))	131	if (likely(man->io_reserve_fastpath))
134	return bdev->driver->io_mem_reserve(bdev, mem);	132	return bdev->driver->io_mem_reserve(bdev, mem);
135		133
136	if (bdev->driver->io_mem_reserve &&	134	if (bdev->driver->io_mem_reserve &&
137	mem->bus.io_reserved_count++ == 0) {	135	mem->bus.io_reserved_count++ == 0) {
138	retry:	136	retry:
139	ret = bdev->driver->io_mem_reserve(bdev, mem);	137	ret = bdev->driver->io_mem_reserve(bdev, mem);
140	if (ret == -EAGAIN) {	138	if (ret == -EAGAIN) {
141	ret = ttm_mem_io_evict(man);	139	ret = ttm_mem_io_evict(man);
142	if (ret == 0)	140	if (ret == 0)
143	goto retry;	141	goto retry;
144	}	142	}
145	}	143	}
146	return ret;	144	return ret;
147	}	145	}
148	EXPORT_SYMBOL(ttm_mem_io_reserve);	146	EXPORT_SYMBOL(ttm_mem_io_reserve);
149		147
150	void ttm_mem_io_free(struct ttm_bo_device *bdev,	148	void ttm_mem_io_free(struct ttm_bo_device *bdev,
151	struct ttm_mem_reg *mem)	149	struct ttm_mem_reg *mem)
152	{	150	{
153	struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];	151	struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
154		152
155	if (likely(man->io_reserve_fastpath))	153	if (likely(man->io_reserve_fastpath))
156	return;	154	return;
157		155
158	if (bdev->driver->io_mem_reserve &&	156	if (bdev->driver->io_mem_reserve &&
159	--mem->bus.io_reserved_count == 0 &&	157	--mem->bus.io_reserved_count == 0 &&
160	bdev->driver->io_mem_free)	158	bdev->driver->io_mem_free)
161	bdev->driver->io_mem_free(bdev, mem);	159	bdev->driver->io_mem_free(bdev, mem);
162		160
163	}	161	}
164	EXPORT_SYMBOL(ttm_mem_io_free);	162	EXPORT_SYMBOL(ttm_mem_io_free);
165		163
166	int ttm_mem_io_reserve_vm(struct ttm_buffer_object *bo)	164	int ttm_mem_io_reserve_vm(struct ttm_buffer_object *bo)
167	{	165	{
168	struct ttm_mem_reg *mem = &bo->mem;	166	struct ttm_mem_reg *mem = &bo->mem;
169	int ret;	167	int ret;
170		168
171	if (!mem->bus.io_reserved_vm) {	169	if (!mem->bus.io_reserved_vm) {
172	struct ttm_mem_type_manager *man =	170	struct ttm_mem_type_manager *man =
173	&bo->bdev->man[mem->mem_type];	171	&bo->bdev->man[mem->mem_type];
174		172
175	ret = ttm_mem_io_reserve(bo->bdev, mem);	173	ret = ttm_mem_io_reserve(bo->bdev, mem);
176	if (unlikely(ret != 0))	174	if (unlikely(ret != 0))
177	return ret;	175	return ret;
178	mem->bus.io_reserved_vm = true;	176	mem->bus.io_reserved_vm = true;
179	if (man->use_io_reserve_lru)	177	if (man->use_io_reserve_lru)
180	list_add_tail(&bo->io_reserve_lru,	178	list_add_tail(&bo->io_reserve_lru,
181	&man->io_reserve_lru);	179	&man->io_reserve_lru);
182	}	180	}
183	return 0;	181	return 0;
184	}	182	}
185		183
186	void ttm_mem_io_free_vm(struct ttm_buffer_object *bo)	184	void ttm_mem_io_free_vm(struct ttm_buffer_object *bo)
187	{	185	{
188	struct ttm_mem_reg *mem = &bo->mem;	186	struct ttm_mem_reg *mem = &bo->mem;
189		187
190	if (mem->bus.io_reserved_vm) {	188	if (mem->bus.io_reserved_vm) {
191	mem->bus.io_reserved_vm = false;	189	mem->bus.io_reserved_vm = false;
192	list_del_init(&bo->io_reserve_lru);	190	list_del_init(&bo->io_reserve_lru);
193	ttm_mem_io_free(bo->bdev, mem);	191	ttm_mem_io_free(bo->bdev, mem);
194	}	192	}
195	}	193	}
196		194
197	static int ttm_mem_reg_ioremap(struct ttm_bo_device bdev, struct ttm_mem_reg mem,	195	static int ttm_mem_reg_ioremap(struct ttm_bo_device bdev, struct ttm_mem_reg mem,
198	void **virtual)	196	void **virtual)
199	{	197	{
200	struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];	198	struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
201	int ret;	199	int ret;
202	void *addr;	200	void *addr;
203		201
204	*virtual = NULL;	202	*virtual = NULL;
205	(void) ttm_mem_io_lock(man, false);	203	(void) ttm_mem_io_lock(man, false);
206	ret = ttm_mem_io_reserve(bdev, mem);	204	ret = ttm_mem_io_reserve(bdev, mem);
207	ttm_mem_io_unlock(man);	205	ttm_mem_io_unlock(man);
208	if (ret \|\| !mem->bus.is_iomem)	206	if (ret \|\| !mem->bus.is_iomem)
209	return ret;	207	return ret;
210		208
211	if (mem->bus.addr) {	209	if (mem->bus.addr) {
212	addr = mem->bus.addr;	210	addr = mem->bus.addr;
213	} else {	211	} else {
214	if (mem->placement & TTM_PL_FLAG_WC)	212	if (mem->placement & TTM_PL_FLAG_WC)
215	addr = ioremap_wc(mem->bus.base + mem->bus.offset, mem->bus.size);	213	addr = ioremap_wc(mem->bus.base + mem->bus.offset, mem->bus.size);
216	else	214	else
217	addr = ioremap_nocache(mem->bus.base + mem->bus.offset, mem->bus.size);	215	addr = ioremap_nocache(mem->bus.base + mem->bus.offset, mem->bus.size);
218	if (!addr) {	216	if (!addr) {
219	(void) ttm_mem_io_lock(man, false);	217	(void) ttm_mem_io_lock(man, false);
220	ttm_mem_io_free(bdev, mem);	218	ttm_mem_io_free(bdev, mem);
221	ttm_mem_io_unlock(man);	219	ttm_mem_io_unlock(man);
222	return -ENOMEM;	220	return -ENOMEM;
223	}	221	}
224	}	222	}
225	*virtual = addr;	223	*virtual = addr;
226	return 0;	224	return 0;
227	}	225	}
228		226
229	static void ttm_mem_reg_iounmap(struct ttm_bo_device bdev, struct ttm_mem_reg mem,	227	static void ttm_mem_reg_iounmap(struct ttm_bo_device bdev, struct ttm_mem_reg mem,
230	void *virtual)	228	void *virtual)
231	{	229	{
232	struct ttm_mem_type_manager *man;	230	struct ttm_mem_type_manager *man;
233		231
234	man = &bdev->man[mem->mem_type];	232	man = &bdev->man[mem->mem_type];
235		233
236	if (virtual && mem->bus.addr == NULL)	234	if (virtual && mem->bus.addr == NULL)
237	iounmap(virtual);	235	iounmap(virtual);
238	(void) ttm_mem_io_lock(man, false);	236	(void) ttm_mem_io_lock(man, false);
239	ttm_mem_io_free(bdev, mem);	237	ttm_mem_io_free(bdev, mem);
240	ttm_mem_io_unlock(man);	238	ttm_mem_io_unlock(man);
241	}	239	}
242		240
243	static int ttm_copy_io_page(void dst, void src, unsigned long page)	241	static int ttm_copy_io_page(void dst, void src, unsigned long page)
244	{	242	{
245	uint32_t *dstP =	243	uint32_t *dstP =
246	(uint32_t *) ((unsigned long)dst + (page << PAGE_SHIFT));	244	(uint32_t *) ((unsigned long)dst + (page << PAGE_SHIFT));
247	uint32_t *srcP =	245	uint32_t *srcP =
248	(uint32_t *) ((unsigned long)src + (page << PAGE_SHIFT));	246	(uint32_t *) ((unsigned long)src + (page << PAGE_SHIFT));
249		247
250	int i;	248	int i;
251	for (i = 0; i < PAGE_SIZE / sizeof(uint32_t); ++i)	249	for (i = 0; i < PAGE_SIZE / sizeof(uint32_t); ++i)
252	iowrite32(ioread32(srcP++), dstP++);	250	iowrite32(ioread32(srcP++), dstP++);
253	return 0;	251	return 0;
254	}	252	}
255		253
256	static int ttm_copy_io_ttm_page(struct ttm_tt ttm, void src,	254	static int ttm_copy_io_ttm_page(struct ttm_tt ttm, void src,
257	unsigned long page,	255	unsigned long page,
258	pgprot_t prot)	256	pgprot_t prot)
259	{	257	{
260	struct page *d = ttm->pages[page];	258	struct page *d = ttm->pages[page];
261	void *dst;	259	void *dst;
262		260
263	if (!d)	261	if (!d)
264	return -ENOMEM;	262	return -ENOMEM;
265		263
266	src = (void *)((unsigned long)src + (page << PAGE_SHIFT));	264	src = (void *)((unsigned long)src + (page << PAGE_SHIFT));
267		265
268	dst = (void*)MapIoMem((addr_t)d, 4096, PG_SW);	266	dst = (void*)MapIoMem((addr_t)d, 4096, PG_SW);
269		267
270	if (!dst)	268	if (!dst)
271	return -ENOMEM;	269	return -ENOMEM;
272		270
273	memcpy(dst, src, PAGE_SIZE);	271	memcpy(dst, src, PAGE_SIZE);
274		272
275	FreeKernelSpace(dst);	273	FreeKernelSpace(dst);
276		274
277	return 0;	275	return 0;
278	}	276	}
279		277
280	static int ttm_copy_ttm_io_page(struct ttm_tt ttm, void dst,	278	static int ttm_copy_ttm_io_page(struct ttm_tt ttm, void dst,
281	unsigned long page,	279	unsigned long page,
282	pgprot_t prot)	280	pgprot_t prot)
283	{	281	{
284	struct page *s = ttm->pages[page];	282	struct page *s = ttm->pages[page];
285	void *src;	283	void *src;
286		284
287	if (!s)	285	if (!s)
288	return -ENOMEM;	286	return -ENOMEM;
289		287
290	dst = (void *)((unsigned long)dst + (page << PAGE_SHIFT));	288	dst = (void *)((unsigned long)dst + (page << PAGE_SHIFT));
291		289
292	src = (void*)MapIoMem((addr_t)s, 4096, PG_SW);	290	src = (void*)MapIoMem((addr_t)s, 4096, PG_SW);
293		291
294	if (!src)	292	if (!src)
295	return -ENOMEM;	293	return -ENOMEM;
296		294
297	memcpy(dst, src, PAGE_SIZE);	295	memcpy(dst, src, PAGE_SIZE);
298		296
299	FreeKernelSpace(src);	297	FreeKernelSpace(src);
300		298
301	return 0;	299	return 0;
302	}	300	}
303		301
304	int ttm_bo_move_memcpy(struct ttm_buffer_object *bo,	302	int ttm_bo_move_memcpy(struct ttm_buffer_object *bo,
305	bool evict, bool no_wait_gpu,	303	bool evict, bool no_wait_gpu,
306	struct ttm_mem_reg *new_mem)	304	struct ttm_mem_reg *new_mem)
307	{	305	{
308	struct ttm_bo_device *bdev = bo->bdev;	306	struct ttm_bo_device *bdev = bo->bdev;
309	struct ttm_mem_type_manager *man = &bdev->man[new_mem->mem_type];	307	struct ttm_mem_type_manager *man = &bdev->man[new_mem->mem_type];
310	struct ttm_tt *ttm = bo->ttm;	308	struct ttm_tt *ttm = bo->ttm;
311	struct ttm_mem_reg *old_mem = &bo->mem;	309	struct ttm_mem_reg *old_mem = &bo->mem;
312	struct ttm_mem_reg old_copy = *old_mem;	310	struct ttm_mem_reg old_copy = *old_mem;
313	void *old_iomap;	311	void *old_iomap;
314	void *new_iomap;	312	void *new_iomap;
315	int ret;	313	int ret;
316	unsigned long i;	314	unsigned long i;
317	unsigned long page;	315	unsigned long page;
318	unsigned long add = 0;	316	unsigned long add = 0;
319	int dir;	317	int dir;
320		318
321	ret = ttm_mem_reg_ioremap(bdev, old_mem, &old_iomap);	319	ret = ttm_mem_reg_ioremap(bdev, old_mem, &old_iomap);
322	if (ret)	320	if (ret)
323	return ret;	321	return ret;
324	ret = ttm_mem_reg_ioremap(bdev, new_mem, &new_iomap);	322	ret = ttm_mem_reg_ioremap(bdev, new_mem, &new_iomap);
325	if (ret)	323	if (ret)
326	goto out;	324	goto out;
327		325
328	/*	326	/*
329	* Single TTM move. NOP.	327	* Single TTM move. NOP.
330	*/	328	*/
331	if (old_iomap == NULL && new_iomap == NULL)	329	if (old_iomap == NULL && new_iomap == NULL)
332	goto out2;	330	goto out2;
333		331
334	/*	332	/*
335	* Don't move nonexistent data. Clear destination instead.	333	* Don't move nonexistent data. Clear destination instead.
336	*/	334	*/
337	if (old_iomap == NULL &&	335	if (old_iomap == NULL &&
338	(ttm == NULL \|\| (ttm->state == tt_unpopulated &&	336	(ttm == NULL \|\| (ttm->state == tt_unpopulated &&
339	!(ttm->page_flags & TTM_PAGE_FLAG_SWAPPED)))) {	337	!(ttm->page_flags & TTM_PAGE_FLAG_SWAPPED)))) {
340	memset(new_iomap, 0, new_mem->num_pages*PAGE_SIZE);	338	memset(new_iomap, 0, new_mem->num_pages*PAGE_SIZE);
341	goto out2;	339	goto out2;
342	}	340	}
343		341
344	/*	342	/*
345	* TTM might be null for moves within the same region.	343	* TTM might be null for moves within the same region.
346	*/	344	*/
347	if (ttm && ttm->state == tt_unpopulated) {	345	if (ttm && ttm->state == tt_unpopulated) {
348	ret = ttm->bdev->driver->ttm_tt_populate(ttm);	346	ret = ttm->bdev->driver->ttm_tt_populate(ttm);
349	if (ret)	347	if (ret)
350	goto out1;	348	goto out1;
351	}	349	}
352		350
353	add = 0;	351	add = 0;
354	dir = 1;	352	dir = 1;
355		353
356	if ((old_mem->mem_type == new_mem->mem_type) &&	354	if ((old_mem->mem_type == new_mem->mem_type) &&
357	(new_mem->start < old_mem->start + old_mem->size)) {	355	(new_mem->start < old_mem->start + old_mem->size)) {
358	dir = -1;	356	dir = -1;
359	add = new_mem->num_pages - 1;	357	add = new_mem->num_pages - 1;
360	}	358	}
361		359
362	for (i = 0; i < new_mem->num_pages; ++i) {	360	for (i = 0; i < new_mem->num_pages; ++i) {
363	page = i * dir + add;	361	page = i * dir + add;
364	if (old_iomap == NULL) {	362	if (old_iomap == NULL) {
365	pgprot_t prot = ttm_io_prot(old_mem->placement,	363	pgprot_t prot = ttm_io_prot(old_mem->placement,
366	PAGE_KERNEL);	364	PAGE_KERNEL);
367	ret = ttm_copy_ttm_io_page(ttm, new_iomap, page,	365	ret = ttm_copy_ttm_io_page(ttm, new_iomap, page,
368	prot);	366	prot);
369	} else if (new_iomap == NULL) {	367	} else if (new_iomap == NULL) {
370	pgprot_t prot = ttm_io_prot(new_mem->placement,	368	pgprot_t prot = ttm_io_prot(new_mem->placement,
371	PAGE_KERNEL);	369	PAGE_KERNEL);
372	ret = ttm_copy_io_ttm_page(ttm, old_iomap, page,	370	ret = ttm_copy_io_ttm_page(ttm, old_iomap, page,
373	prot);	371	prot);
374	} else	372	} else
375	ret = ttm_copy_io_page(new_iomap, old_iomap, page);	373	ret = ttm_copy_io_page(new_iomap, old_iomap, page);
376	if (ret)	374	if (ret)
377	goto out1;	375	goto out1;
378	}	376	}
379	mb();	377	mb();
380	out2:	378	out2:
381	old_copy = *old_mem;	379	old_copy = *old_mem;
382	old_mem = new_mem;	380	old_mem = new_mem;
383	new_mem->mm_node = NULL;	381	new_mem->mm_node = NULL;
384		382
385	if ((man->flags & TTM_MEMTYPE_FLAG_FIXED) && (ttm != NULL)) {	383	if ((man->flags & TTM_MEMTYPE_FLAG_FIXED) && (ttm != NULL)) {
386	ttm_tt_unbind(ttm);	384	ttm_tt_unbind(ttm);
387	ttm_tt_destroy(ttm);	385	ttm_tt_destroy(ttm);
388	bo->ttm = NULL;	386	bo->ttm = NULL;
389	}	387	}
390		388
391	out1:	389	out1:
392	ttm_mem_reg_iounmap(bdev, old_mem, new_iomap);	390	ttm_mem_reg_iounmap(bdev, old_mem, new_iomap);
393	out:	391	out:
394	ttm_mem_reg_iounmap(bdev, &old_copy, old_iomap);	392	ttm_mem_reg_iounmap(bdev, &old_copy, old_iomap);
395		393
396	/*	394	/*
397	* On error, keep the mm node!	395	* On error, keep the mm node!
398	*/	396	*/
399	if (!ret)	397	if (!ret)
400	ttm_bo_mem_put(bo, &old_copy);	398	ttm_bo_mem_put(bo, &old_copy);
401	return ret;	399	return ret;
402	}	400	}
403	EXPORT_SYMBOL(ttm_bo_move_memcpy);	401	EXPORT_SYMBOL(ttm_bo_move_memcpy);
404		402
405	static void ttm_transfered_destroy(struct ttm_buffer_object *bo)	403	static void ttm_transfered_destroy(struct ttm_buffer_object *bo)
406	{	404	{
407	kfree(bo);	405	kfree(bo);
408	}	406	}
409		407
410	/**	408	/**
411	* ttm_buffer_object_transfer	409	* ttm_buffer_object_transfer
412	*	410	*
413	* @bo: A pointer to a struct ttm_buffer_object.	411	* @bo: A pointer to a struct ttm_buffer_object.
414	* @new_obj: A pointer to a pointer to a newly created ttm_buffer_object,	412	* @new_obj: A pointer to a pointer to a newly created ttm_buffer_object,
415	* holding the data of @bo with the old placement.	413	* holding the data of @bo with the old placement.
416	*	414	*
417	* This is a utility function that may be called after an accelerated move	415	* This is a utility function that may be called after an accelerated move
418	* has been scheduled. A new buffer object is created as a placeholder for	416	* has been scheduled. A new buffer object is created as a placeholder for
419	* the old data while it's being copied. When that buffer object is idle,	417	* the old data while it's being copied. When that buffer object is idle,
420	* it can be destroyed, releasing the space of the old placement.	418	* it can be destroyed, releasing the space of the old placement.
421	* Returns:	419	* Returns:
422	* !0: Failure.	420	* !0: Failure.
423	*/	421	*/
424		422
425	static int ttm_buffer_object_transfer(struct ttm_buffer_object *bo,	423	static int ttm_buffer_object_transfer(struct ttm_buffer_object *bo,
426	struct ttm_buffer_object **new_obj)	424	struct ttm_buffer_object **new_obj)
427	{	425	{
428	struct ttm_buffer_object *fbo;	426	struct ttm_buffer_object *fbo;
429	int ret;	427	int ret;
430		428
431	fbo = kmalloc(sizeof(*fbo), GFP_KERNEL);	429	fbo = kmalloc(sizeof(*fbo), GFP_KERNEL);
432	if (!fbo)	430	if (!fbo)
433	return -ENOMEM;	431	return -ENOMEM;
434		432
435	fbo = bo;	433	fbo = bo;
436		434
437	/**	435	/**
438	* Fix up members that we shouldn't copy directly:	436	* Fix up members that we shouldn't copy directly:
439	* TODO: Explicit member copy would probably be better here.	437	* TODO: Explicit member copy would probably be better here.
440	*/	438	*/
441		439
442	INIT_LIST_HEAD(&fbo->ddestroy);	440	INIT_LIST_HEAD(&fbo->ddestroy);
443	INIT_LIST_HEAD(&fbo->lru);	441	INIT_LIST_HEAD(&fbo->lru);
444	INIT_LIST_HEAD(&fbo->swap);	442	INIT_LIST_HEAD(&fbo->swap);
445	INIT_LIST_HEAD(&fbo->io_reserve_lru);	443	INIT_LIST_HEAD(&fbo->io_reserve_lru);
446	drm_vma_node_reset(&fbo->vma_node);	444	drm_vma_node_reset(&fbo->vma_node);
447	atomic_set(&fbo->cpu_writers, 0);	445	atomic_set(&fbo->cpu_writers, 0);
448		446
449	kref_init(&fbo->list_kref);	447	kref_init(&fbo->list_kref);
450	kref_init(&fbo->kref);	448	kref_init(&fbo->kref);
451	fbo->destroy = &ttm_transfered_destroy;	449	fbo->destroy = &ttm_transfered_destroy;
452	fbo->acc_size = 0;	450	fbo->acc_size = 0;
453	fbo->resv = &fbo->ttm_resv;	451	fbo->resv = &fbo->ttm_resv;
454	reservation_object_init(fbo->resv);	452	reservation_object_init(fbo->resv);
455	ret = ww_mutex_trylock(&fbo->resv->lock);	453	ret = ww_mutex_trylock(&fbo->resv->lock);
456	WARN_ON(!ret);	454	WARN_ON(!ret);
457		455
458	*new_obj = fbo;	456	*new_obj = fbo;
459	return 0;	457	return 0;
460	}	458	}
461		459
462	pgprot_t ttm_io_prot(uint32_t caching_flags, pgprot_t tmp)	460	pgprot_t ttm_io_prot(uint32_t caching_flags, pgprot_t tmp)
463	{	461	{
-		462	/* Cached mappings need no adjustment */
-		463	if (caching_flags & TTM_PL_FLAG_CACHED)
-		464	return tmp;
464	return tmp;	465	return tmp;
465	}	466	}
466	EXPORT_SYMBOL(ttm_io_prot);	467	EXPORT_SYMBOL(ttm_io_prot);
467		468
468	static int ttm_bo_ioremap(struct ttm_buffer_object *bo,	469	static int ttm_bo_ioremap(struct ttm_buffer_object *bo,
469	unsigned long offset,	470	unsigned long offset,
470	unsigned long size,	471	unsigned long size,
471	struct ttm_bo_kmap_obj *map)	472	struct ttm_bo_kmap_obj *map)
472	{	473	{
473	struct ttm_mem_reg *mem = &bo->mem;	474	struct ttm_mem_reg *mem = &bo->mem;
474		475
475	if (bo->mem.bus.addr) {	476	if (bo->mem.bus.addr) {
476	map->bo_kmap_type = ttm_bo_map_premapped;	477	map->bo_kmap_type = ttm_bo_map_premapped;
477	map->virtual = (void )(((u8 )bo->mem.bus.addr) + offset);	478	map->virtual = (void )(((u8 )bo->mem.bus.addr) + offset);
478	} else {	479	} else {
479	map->bo_kmap_type = ttm_bo_map_iomap;	480	map->bo_kmap_type = ttm_bo_map_iomap;
480	if (mem->placement & TTM_PL_FLAG_WC)	481	if (mem->placement & TTM_PL_FLAG_WC)
481	map->virtual = ioremap_wc(bo->mem.bus.base + bo->mem.bus.offset + offset,	482	map->virtual = ioremap_wc(bo->mem.bus.base + bo->mem.bus.offset + offset,
482	size);	483	size);
483	else	484	else
484	map->virtual = ioremap_nocache(bo->mem.bus.base + bo->mem.bus.offset + offset,	485	map->virtual = ioremap_nocache(bo->mem.bus.base + bo->mem.bus.offset + offset,
485	size);	486	size);
486	}	487	}
487	return (!map->virtual) ? -ENOMEM : 0;	488	return (!map->virtual) ? -ENOMEM : 0;
488	}	489	}
489		490
490	static int ttm_bo_kmap_ttm(struct ttm_buffer_object *bo,	491	static int ttm_bo_kmap_ttm(struct ttm_buffer_object *bo,
491	unsigned long start_page,	492	unsigned long start_page,
492	unsigned long num_pages,	493	unsigned long num_pages,
493	struct ttm_bo_kmap_obj *map)	494	struct ttm_bo_kmap_obj *map)
494	{	495	{
495	struct ttm_mem_reg *mem = &bo->mem; pgprot_t prot;	496	struct ttm_mem_reg *mem = &bo->mem; pgprot_t prot;
496	struct ttm_tt *ttm = bo->ttm;	497	struct ttm_tt *ttm = bo->ttm;
497	int ret;	498	int ret;

Subversion Repositories Kolibri OS

(root)/drivers/video/drm/ttm/ttm_bo_util.c – Rev 6296 → 6938