Re: [PATCH] arm64: Add architecture support for PCI

+#include <linux/init.h> +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/mm.h> +#include <linux/of_pci.h> +#include <linux/of_platform.h> +#include <linux/slab.h>

+#include <asm/pci-bridge.h>

+/*

• • Return the domain number for this bus
• */

+int pci_domain_nr(struct pci_bus *bus) +{

• struct pci_host_bridge *bridge = to_pci_host_bridge(bus->bridge);

Here bus is specific to root bus ? or, what about use find_pci_host_bridge() to get the pci_host_bridge instead.

• if (bridge)

• return bridge->domain_nr;
  

• return 0;

+}

+int pci_proc_domain(struct pci_bus *bus) +{

• return pci_domain_nr(bus);

+}

+/*

• • Called after each bus is probed, but before its children are examined
• */

+void pcibios_fixup_bus(struct pci_bus *bus) +{

• struct pci_dev *dev;
• struct resource *res;
• int i;
• if (bus->self != NULL) {

What about use !pci_is_root_bus() ?

• pci_read_bridge_bases(bus);
  

• pci_bus_for_each_resource(bus, res, i) {
  

• 	if (!res || !res->flags || res->parent)
  

• 		continue;
  

• 	/*
  

• 	 * If we are going to reassign everything, we can
  

• 	 * shrink the P2P resource to have zero size to
  

• 	 * save space
  

• 	 */
  

• 	if (pci_has_flag(PCI_REASSIGN_ALL_RSRC)) {
  

• 		res->flags |= IORESOURCE_UNSET;
  

• 		res->start = 0;
  

• 		res->end = -1;
  

• 		continue;
  

• 	}
  

• }
  

• }