Example #1
0
struct drm_i915_gem_object *
i915_gem_object_create_stolen_for_preallocated(struct drm_device *dev,
					       u32 stolen_offset,
					       u32 gtt_offset,
					       u32 size)
{
	struct drm_i915_private *dev_priv = dev->dev_private;
	struct i915_address_space *ggtt = &dev_priv->gtt.base;
	struct drm_i915_gem_object *obj;
	struct drm_mm_node *stolen;
	struct i915_vma *vma;
	int ret;

	if (!drm_mm_initialized(&dev_priv->mm.stolen))
		return NULL;

	DRM_DEBUG_KMS("creating preallocated stolen object: stolen_offset=%x, gtt_offset=%x, size=%x\n",
			stolen_offset, gtt_offset, size);

	/* KISS and expect everything to be page-aligned */
	BUG_ON(stolen_offset & 4095);
	BUG_ON(size & 4095);

	if (WARN_ON(size == 0))
		return NULL;

	stolen = kzalloc(sizeof(*stolen), GFP_KERNEL);
	if (!stolen)
		return NULL;

	stolen->start = stolen_offset;
	stolen->size = size;
	ret = drm_mm_reserve_node(&dev_priv->mm.stolen, stolen);
	if (ret) {
		DRM_DEBUG_KMS("failed to allocate stolen space\n");
		kfree(stolen);
		return NULL;
	}

	obj = _i915_gem_object_create_stolen(dev, stolen);
	if (obj == NULL) {
		DRM_DEBUG_KMS("failed to allocate stolen object\n");
		drm_mm_remove_node(stolen);
		kfree(stolen);
		return NULL;
	}

	/* Some objects just need physical mem from stolen space */
	if (gtt_offset == I915_GTT_OFFSET_NONE)
		return obj;

	vma = i915_gem_vma_create(obj, ggtt);
	if (IS_ERR(vma)) {
		ret = PTR_ERR(vma);
		goto err_out;
	}

	/* To simplify the initialisation sequence between KMS and GTT,
	 * we allow construction of the stolen object prior to
	 * setting up the GTT space. The actual reservation will occur
	 * later.
	 */
	vma->node.start = gtt_offset;
	vma->node.size = size;
	if (drm_mm_initialized(&ggtt->mm)) {
		ret = drm_mm_reserve_node(&ggtt->mm, &vma->node);
		if (ret) {
			DRM_DEBUG_KMS("failed to allocate stolen GTT space\n");
			goto err_vma;
		}
	}

	obj->has_global_gtt_mapping = 1;

	list_add_tail(&obj->global_list, &dev_priv->mm.bound_list);
	list_add_tail(&vma->mm_list, &ggtt->inactive_list);

	return obj;

err_vma:
	i915_gem_vma_destroy(vma);
err_out:
	drm_mm_remove_node(stolen);
	kfree(stolen);
	drm_gem_object_unreference(&obj->base);
	return NULL;
}
struct drm_i915_gem_object *
kos_gem_fb_object_create(struct drm_device *dev,
                           u32 gtt_offset,
                           u32 size)
{
    struct drm_i915_private *dev_priv = dev->dev_private;
    struct i915_address_space *ggtt = &dev_priv->gtt.base;
    struct drm_i915_gem_object *obj;
    struct drm_mm_node *fb_node;
    struct i915_vma *vma;
    int ret;

    DRM_DEBUG_KMS("creating preallocated framebuffer object: gtt_offset=%x, size=%x\n",
                  gtt_offset, size);

    /* KISS and expect everything to be page-aligned */
    BUG_ON(size & 4095);

    if (WARN_ON(size == 0))
        return NULL;

    fb_node = kzalloc(sizeof(*fb_node), GFP_KERNEL);
    if (!fb_node)
        return NULL;

    fb_node->start = gtt_offset;
    fb_node->size = size;

    obj = _kos_fb_object_create(dev, fb_node);
    if (obj == NULL) {
        DRM_DEBUG_KMS("failed to preallocate framebuffer object\n");
        kfree(fb_node);
        return NULL;
    }

    vma = i915_gem_obj_lookup_or_create_vma(obj, ggtt);
    if (IS_ERR(vma)) {
        ret = PTR_ERR(vma);
        goto err_out;
    }

    /* To simplify the initialisation sequence between KMS and GTT,
     * we allow construction of the stolen object prior to
     * setting up the GTT space. The actual reservation will occur
     * later.
     */
    vma->node.start = gtt_offset;
    vma->node.size = size;
    if (drm_mm_initialized(&ggtt->mm)) {
        ret = drm_mm_reserve_node(&ggtt->mm, &vma->node);
        if (ret) {
            DRM_DEBUG_KMS("failed to allocate framebuffer GTT space\n");
            goto err_vma;
        }
    }

//    obj->has_global_gtt_mapping = 1;

    list_add_tail(&obj->global_list, &dev_priv->mm.bound_list);
    list_add_tail(&vma->mm_list, &ggtt->inactive_list);

    mutex_lock(&dev->object_name_lock);
    idr_preload(GFP_KERNEL);

    if (!obj->base.name) {
        ret = idr_alloc(&dev->object_name_idr, &obj->base, 1, 0, GFP_NOWAIT);
        if (ret < 0)
            goto err_gem;

        obj->base.name = ret;

        /* Allocate a reference for the name table.  */
        drm_gem_object_reference(&obj->base);

        DRM_DEBUG_KMS("%s allocate fb name %d\n", __FUNCTION__, obj->base.name );
    }

    idr_preload_end();
    mutex_unlock(&dev->object_name_lock);
    drm_gem_object_unreference(&obj->base);
    return obj;

err_gem:
    idr_preload_end();
    mutex_unlock(&dev->object_name_lock);
err_vma:
    i915_gem_vma_destroy(vma);
err_out:
    kfree(fb_node);
    drm_gem_object_unreference(&obj->base);
    return NULL;
}