Function allocate_resources

src/device/resource_allocator_v4.c:549–575

* This function forms the guts of the resource allocator. It walks * through the entire device tree for each domain two times. * * Every domain has a fixed set of ranges. These ranges cannot be * relaxed based on the requirements of the downstream devices. They * represent the available windows from which resources can be allocated * to the different devices under the domain. * * In order

 *    allocated to the bridge.
 */
void allocate_resources(const struct device *root)
{
	const struct device *child;

	if ((root == NULL) || (root->downstream == NULL))
		return;

	for (child = root->downstream->children; child; child = child->sibling) {
		if (child->path.type != DEVICE_PATH_DOMAIN)
			continue;

		post_log_path(child);

		/* Pass 1 - Relative placement. */
		printk(BIOS_INFO, "=== Resource allocator: %s - Pass 1 (relative placement) ===\n",
		       dev_path(child));
		compute_domain_resources(child);

		/* Pass 2 - Allocate resources as per gathered requirements. */
		printk(BIOS_INFO, "=== Resource allocator: %s - Pass 2 (allocating resources) ===\n",
		       dev_path(child));
		allocate_domain_resources(child);

		printk(BIOS_INFO, "=== Resource allocator: %s - resource allocation complete ===\n",
		       dev_path(child));
	}
}