arch/arm64/kernel/pci.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Code borrowed from powerpc/kernel/pci-common.c
 *
 * Copyright (C) 2003 Anton Blanchard <anton@au.ibm.com>, IBM
 * Copyright (C) 2014 ARM Ltd.
 */

#include <linux/pci.h>

/*
 * raw_pci_read/write - Platform-specific PCI config space access.
 */
int raw_pci_read(unsigned int domain, unsigned int bus,
		  unsigned int devfn, int reg, int len, u32 *val)
{
	struct pci_bus *b = pci_find_bus(domain, bus);

	if (!b)
		return PCIBIOS_DEVICE_NOT_FOUND;
	return b->ops->read(b, devfn, reg, len, val);
}

int raw_pci_write(unsigned int domain, unsigned int bus,
		unsigned int devfn, int reg, int len, u32 val)
{
	struct pci_bus *b = pci_find_bus(domain, bus);

	if (!b)
		return PCIBIOS_DEVICE_NOT_FOUND;
	return b->ops->write(b, devfn, reg, len, val);
}

#ifdef CONFIG_NUMA

int pcibus_to_node(struct pci_bus *bus)
{
	return dev_to_node(&bus->dev);
}
EXPORT_SYMBOL(pcibus_to_node);

#endif