1/*
2 * File:	portdrv_bus.c
3 * Purpose:	PCI Express Port Bus Driver's Bus Overloading Functions
4 *
5 * Copyright (C) 2004 Intel
6 * Copyright (C) Tom Long Nguyen (tom.l.nguyen@intel.com)
7 */
8
9#include <linux/module.h>
10#include <linux/pci.h>
11#include <linux/kernel.h>
12#include <linux/errno.h>
13#include <linux/pm.h>
14
15#include <linux/pcieport_if.h>
16#include "portdrv.h"
17
18static int pcie_port_bus_match(struct device *dev, struct device_driver *drv);
19
20struct bus_type pcie_port_bus_type = {
21	.name		= "pci_express",
22	.match		= pcie_port_bus_match,
23};
24EXPORT_SYMBOL_GPL(pcie_port_bus_type);
25
26static int pcie_port_bus_match(struct device *dev, struct device_driver *drv)
27{
28	struct pcie_device *pciedev;
29	struct pcie_port_service_driver *driver;
30
31	if (drv->bus != &pcie_port_bus_type || dev->bus != &pcie_port_bus_type)
32		return 0;
33
34	pciedev = to_pcie_device(dev);
35	driver = to_service_driver(drv);
36
37	if (driver->service != pciedev->service)
38		return 0;
39
40	if ((driver->port_type != PCIE_ANY_PORT) &&
41	    (driver->port_type != pci_pcie_type(pciedev->port)))
42		return 0;
43
44	return 1;
45}
46
47int pcie_port_bus_register(void)
48{
49	return bus_register(&pcie_port_bus_type);
50}
51
52void pcie_port_bus_unregister(void)
53{
54	bus_unregister(&pcie_port_bus_type);
55}
56