arch/x86/include/asm/pci.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_X86_PCI_H
#define _ASM_X86_PCI_H

#include <linux/mm.h> /* for struct page */
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/scatterlist.h>
#include <linux/numa.h>
#include <asm/io.h>
#include <asm/memtype.h>

struct pci_sysdata {
	int		domain;		/* PCI domain */
	int		node;		/* NUMA node */
#ifdef CONFIG_ACPI
	struct acpi_device *companion;	/* ACPI companion device */
#endif
#ifdef CONFIG_X86_64
	void		*iommu;		/* IOMMU private data */
#endif
#ifdef CONFIG_PCI_MSI
	void		*fwnode;	/* IRQ domain for MSI assignment */
#endif
#if IS_ENABLED(CONFIG_VMD)
	struct pci_dev	*vmd_dev;	/* VMD Device if in Intel VMD domain */
#endif
};

extern int pci_routeirq;
extern int noioapicquirk;
extern int noioapicreroute;

static inline struct pci_sysdata *to_pci_sysdata(const struct pci_bus *bus)
{
	return bus->sysdata;
}

#ifdef CONFIG_PCI

#ifdef CONFIG_PCI_DOMAINS
static inline int pci_domain_nr(struct pci_bus *bus)
{
	return to_pci_sysdata(bus)->domain;
}

static inline int pci_proc_domain(struct pci_bus *bus)
{
	return pci_domain_nr(bus);
}
#endif

#ifdef CONFIG_PCI_MSI
static inline void *_pci_root_bus_fwnode(struct pci_bus *bus)
{
	return to_pci_sysdata(bus)->fwnode;
}

#define pci_root_bus_fwnode	_pci_root_bus_fwnode
#endif

#if IS_ENABLED(CONFIG_VMD)
static inline bool is_vmd(struct pci_bus *bus)
{
	return to_pci_sysdata(bus)->vmd_dev != NULL;
}
#else
#define is_vmd(bus)		false
#endif /* CONFIG_VMD */

/* Can be used to override the logic in pci_scan_bus for skipping
   already-configured bus numbers - to be used for buggy BIOSes
   or architectures with incomplete PCI setup by the loader */

extern unsigned int pcibios_assign_all_busses(void);
extern int pci_legacy_init(void);
#else
static inline int pcibios_assign_all_busses(void) { return 0; }
#endif

extern unsigned long pci_mem_start;
#define PCIBIOS_MIN_IO		0x1000
#define PCIBIOS_MIN_MEM		(pci_mem_start)

#define PCIBIOS_MIN_CARDBUS_IO	0x4000

extern int pcibios_enabled;
void pcibios_scan_root(int bus);

struct irq_routing_table *pcibios_get_irq_routing_table(void);
int pcibios_set_irq_routing(struct pci_dev *dev, int pin, int irq);

bool pci_dev_has_default_msi_parent_domain(struct pci_dev *dev);

#define HAVE_PCI_MMAP
#define arch_can_pci_mmap_wc()	pat_enabled()
#define ARCH_GENERIC_PCI_MMAP_RESOURCE

#ifdef CONFIG_PCI
extern void early_quirks(void);
#else
static inline void early_quirks(void) { }
#endif

extern void pci_iommu_alloc(void);

#ifdef CONFIG_NUMA
/* Returns the node based on pci bus */
static inline int __pcibus_to_node(const struct pci_bus *bus)
{
	return to_pci_sysdata(bus)->node;
}

static inline const struct cpumask *
cpumask_of_pcibus(const struct pci_bus *bus)
{
	int node;

	node = __pcibus_to_node(bus);
	return (node == NUMA_NO_NODE) ? cpu_online_mask :
			      cpumask_of_node(node);
}
#endif

#endif /* _ASM_X86_PCI_H */