C++ (Cpp) drm_mm_insert_node_in_range_generic Examples

Example #1

File: ttm_bo_manager.c Project: ashmew2/kolibriosSVN

static int ttm_bo_man_get_node(struct ttm_mem_type_manager *man,
			       struct ttm_buffer_object *bo,
			       const struct ttm_place *place,
			       struct ttm_mem_reg *mem)
{
	struct ttm_range_manager *rman = (struct ttm_range_manager *) man->priv;
	struct drm_mm *mm = &rman->mm;
	struct drm_mm_node *node = NULL;
	enum drm_mm_search_flags sflags = DRM_MM_SEARCH_BEST;
	enum drm_mm_allocator_flags aflags = DRM_MM_CREATE_DEFAULT;
	unsigned long lpfn;
	int ret;

	lpfn = place->lpfn;
	if (!lpfn)
		lpfn = man->size;

	node = kzalloc(sizeof(*node), GFP_KERNEL);
	if (!node)
		return -ENOMEM;

	if (place->flags & TTM_PL_FLAG_TOPDOWN) {
		sflags = DRM_MM_SEARCH_BELOW;
		aflags = DRM_MM_CREATE_TOP;
	}

		spin_lock(&rman->lock);
	ret = drm_mm_insert_node_in_range_generic(mm, node, mem->num_pages,
					  mem->page_alignment, 0,
					  place->fpfn, lpfn,
					  sflags, aflags);
			spin_unlock(&rman->lock);

	if (unlikely(ret)) {
		kfree(node);
	} else {
	mem->mm_node = node;
	mem->start = node->start;
	}

	return 0;
}

Example #2

File: i915_vma.c Project: igithubaccount/linux

/**
 * i915_vma_insert - finds a slot for the vma in its address space
 * @vma: the vma
 * @size: requested size in bytes (can be larger than the VMA)
 * @alignment: required alignment
 * @flags: mask of PIN_* flags to use
 *
 * First we try to allocate some free space that meets the requirements for
 * the VMA. Failiing that, if the flags permit, it will evict an old VMA,
 * preferrably the oldest idle entry to make room for the new VMA.
 *
 * Returns:
 * 0 on success, negative error code otherwise.
 */
static int
i915_vma_insert(struct i915_vma *vma, u64 size, u64 alignment, u64 flags)
{
	struct drm_i915_private *dev_priv = to_i915(vma->vm->dev);
	struct drm_i915_gem_object *obj = vma->obj;
	u64 start, end;
	int ret;

	GEM_BUG_ON(vma->flags & (I915_VMA_GLOBAL_BIND | I915_VMA_LOCAL_BIND));
	GEM_BUG_ON(drm_mm_node_allocated(&vma->node));

	size = max(size, vma->size);
	if (flags & PIN_MAPPABLE)
		size = i915_gem_get_ggtt_size(dev_priv, size,
					      i915_gem_object_get_tiling(obj));

	alignment = max(max(alignment, vma->display_alignment),
			i915_gem_get_ggtt_alignment(dev_priv, size,
						    i915_gem_object_get_tiling(obj),
						    flags & PIN_MAPPABLE));

	start = flags & PIN_OFFSET_BIAS ? flags & PIN_OFFSET_MASK : 0;

	end = vma->vm->total;
	if (flags & PIN_MAPPABLE)
		end = min_t(u64, end, dev_priv->ggtt.mappable_end);
	if (flags & PIN_ZONE_4G)
		end = min_t(u64, end, (1ULL << 32) - PAGE_SIZE);

	/* If binding the object/GGTT view requires more space than the entire
	 * aperture has, reject it early before evicting everything in a vain
	 * attempt to find space.
	 */
	if (size > end) {
		DRM_DEBUG("Attempting to bind an object larger than the aperture: request=%llu [object=%zd] > %s aperture=%llu\n",
			  size, obj->base.size,
			  flags & PIN_MAPPABLE ? "mappable" : "total",
			  end);
		return -E2BIG;
	}

	ret = i915_gem_object_pin_pages(obj);
	if (ret)
		return ret;

	if (flags & PIN_OFFSET_FIXED) {
		u64 offset = flags & PIN_OFFSET_MASK;
		if (offset & (alignment - 1) || offset > end - size) {
			ret = -EINVAL;
			goto err_unpin;
		}

		vma->node.start = offset;
		vma->node.size = size;
		vma->node.color = obj->cache_level;
		ret = drm_mm_reserve_node(&vma->vm->mm, &vma->node);
		if (ret) {
			ret = i915_gem_evict_for_vma(vma);
			if (ret == 0)
				ret = drm_mm_reserve_node(&vma->vm->mm, &vma->node);
			if (ret)
				goto err_unpin;
		}
	} else {
		u32 search_flag, alloc_flag;

		if (flags & PIN_HIGH) {
			search_flag = DRM_MM_SEARCH_BELOW;
			alloc_flag = DRM_MM_CREATE_TOP;
		} else {
			search_flag = DRM_MM_SEARCH_DEFAULT;
			alloc_flag = DRM_MM_CREATE_DEFAULT;
		}

		/* We only allocate in PAGE_SIZE/GTT_PAGE_SIZE (4096) chunks,
		 * so we know that we always have a minimum alignment of 4096.
		 * The drm_mm range manager is optimised to return results
		 * with zero alignment, so where possible use the optimal
		 * path.
		 */
		if (alignment <= 4096)
			alignment = 0;

search_free:
		ret = drm_mm_insert_node_in_range_generic(&vma->vm->mm,
							  &vma->node,
							  size, alignment,
							  obj->cache_level,
							  start, end,
							  search_flag,
							  alloc_flag);
		if (ret) {
			ret = i915_gem_evict_something(vma->vm, size, alignment,
						       obj->cache_level,
						       start, end,
						       flags);
			if (ret == 0)
				goto search_free;

			goto err_unpin;
		}

		GEM_BUG_ON(vma->node.start < start);
		GEM_BUG_ON(vma->node.start + vma->node.size > end);
	}
	GEM_BUG_ON(!i915_gem_valid_gtt_space(vma, obj->cache_level));

	list_move_tail(&obj->global_link, &dev_priv->mm.bound_list);
	list_move_tail(&vma->vm_link, &vma->vm->inactive_list);
	obj->bind_count++;
	GEM_BUG_ON(atomic_read(&obj->mm.pages_pin_count) < obj->bind_count);

	return 0;

err_unpin:
	i915_gem_object_unpin_pages(obj);
	return ret;
}