pci.c

 1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * Code borrowed from powerpc/kernel/pci-common.c
 4 *
 5 * Copyright (C) 2003 Anton Blanchard <anton@au.ibm.com>, IBM
 6 * Copyright (C) 2014 ARM Ltd.
 7 */
 8
 9#include <linux/pci.h>
10
11/*
12 * raw_pci_read/write - Platform-specific PCI config space access.
13 */
14int raw_pci_read(unsigned int domain, unsigned int bus,
15		  unsigned int devfn, int reg, int len, u32 *val)
16{
17	struct pci_bus *b = pci_find_bus(domain, bus);
18
19	if (!b)
20		return PCIBIOS_DEVICE_NOT_FOUND;
21	return b->ops->read(b, devfn, reg, len, val);
22}
23
24int raw_pci_write(unsigned int domain, unsigned int bus,
25		unsigned int devfn, int reg, int len, u32 val)
26{
27	struct pci_bus *b = pci_find_bus(domain, bus);
28
29	if (!b)
30		return PCIBIOS_DEVICE_NOT_FOUND;
31	return b->ops->write(b, devfn, reg, len, val);
32}
33
34#ifdef CONFIG_NUMA
35
36int pcibus_to_node(struct pci_bus *bus)
37{
38	return dev_to_node(&bus->dev);
39}
40EXPORT_SYMBOL(pcibus_to_node);
41
42#endif