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drm: add move zero function to memset unclean buffers

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Dave Airlie 2008-08-26 17:43:12 +10:00
parent c72a4e20e8
commit 203243eea5
2 changed files with 73 additions and 0 deletions
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71
linux-core/drm_bo_move.c
View File

@ -272,6 +272,77 @@ out:
}
EXPORT_SYMBOL(drm_bo_move_memcpy);
static int drm_memset_io_page(void *dst, unsigned long page)
{
dst = (void *)((unsigned long)dst + (page << PAGE_SHIFT));
memset_io(dst, 0, PAGE_SIZE);
return 0;
}
static int drm_memset_ttm_page(struct drm_ttm *ttm, unsigned long page)
{
struct page *d = drm_ttm_get_page(ttm, page);
void *dst;
dst = kmap(d);
if (!dst)
return -ENOMEM;
memset_io(dst, 0, PAGE_SIZE);
kunmap(d);
return 0;
}
int drm_bo_move_zero(struct drm_buffer_object *bo,
int evict, int no_wait, struct drm_bo_mem_reg *new_mem)
{
struct drm_device *dev = bo->dev;
struct drm_mem_type_manager *man = &dev->bm.man[new_mem->mem_type];
struct drm_ttm *ttm = bo->ttm;
void *new_iomap;
int ret;
struct drm_bo_mem_reg *old_mem = &bo->mem;
uint64_t save_flags = old_mem->flags;
uint64_t save_proposed_flags = old_mem->proposed_flags;
unsigned long i;
unsigned long page;
ret = drm_mem_reg_ioremap(dev, new_mem, &new_iomap);
if (ret)
goto out;
if (new_iomap == NULL && ttm == NULL)
goto out2;
for (i = 0; i < new_mem->num_pages; ++i) {
if (new_iomap == NULL)
ret = drm_memset_ttm_page(ttm, i);
else
ret = drm_memset_io_page(new_iomap, i);
if (ret)
goto out1;
}
mb();
out2:
drm_bo_free_old_node(bo);
*old_mem = *new_mem;
new_mem->mm_node = NULL;
old_mem->proposed_flags = save_proposed_flags;
DRM_FLAG_MASKED(save_flags, new_mem->flags, DRM_BO_MASK_MEMTYPE);
if ((man->flags & _DRM_FLAG_MEMTYPE_FIXED) && (ttm != NULL)) {
drm_ttm_unbind(ttm);
drm_ttm_destroy(ttm);
bo->ttm = NULL;
}
out1:
drm_mem_reg_iounmap(dev, new_mem, new_iomap);
out:
return ret;
}
EXPORT_SYMBOL(drm_bo_move_zero);
/*
* Transfer a buffer object's memory and LRU status to a newly
* created object. User-space references remains with the old

2
linux-core/drm_objects.h
View File

@ -808,6 +808,8 @@ extern int drm_bo_move_ttm(struct drm_buffer_object *bo,
extern int drm_bo_move_memcpy(struct drm_buffer_object *bo,
int evict,
int no_wait, struct drm_bo_mem_reg *new_mem);
extern int drm_bo_move_zero(struct drm_buffer_object *bo,
int evict, int no_wait, struct drm_bo_mem_reg *new_mem);
extern int drm_bo_move_accel_cleanup(struct drm_buffer_object *bo,
int evict, int no_wait,
uint32_t fence_class, uint32_t fence_type,