pci.h

  1/* SPDX-License-Identifier: GPL-2.0 */
  2#ifndef _ASM_X86_PCI_H
  3#define _ASM_X86_PCI_H
  4
  5#include <linux/mm.h> /* for struct page */
  6#include <linux/types.h>
  7#include <linux/slab.h>
  8#include <linux/string.h>
  9#include <linux/scatterlist.h>
 10#include <linux/numa.h>
 11#include <asm/io.h>
 12#include <asm/memtype.h>
 13
 14struct pci_sysdata {
 15	int		domain;		/* PCI domain */
 16	int		node;		/* NUMA node */
 17#ifdef CONFIG_ACPI
 18	struct acpi_device *companion;	/* ACPI companion device */
 19#endif
 20#ifdef CONFIG_X86_64
 21	void		*iommu;		/* IOMMU private data */
 22#endif
 23#ifdef CONFIG_PCI_MSI
 24	void		*fwnode;	/* IRQ domain for MSI assignment */
 25#endif
 26#if IS_ENABLED(CONFIG_VMD)
 27	struct pci_dev	*vmd_dev;	/* VMD Device if in Intel VMD domain */
 28#endif
 29};
 30
 31extern int pci_routeirq;
 32extern int noioapicquirk;
 33extern int noioapicreroute;
 34
 35static inline struct pci_sysdata *to_pci_sysdata(const struct pci_bus *bus)
 36{
 37	return bus->sysdata;
 38}
 39
 40#ifdef CONFIG_PCI
 41
 42#ifdef CONFIG_PCI_DOMAINS
 43static inline int pci_domain_nr(struct pci_bus *bus)
 44{
 45	return to_pci_sysdata(bus)->domain;
 46}
 47
 48static inline int pci_proc_domain(struct pci_bus *bus)
 49{
 50	return pci_domain_nr(bus);
 51}
 52#endif
 53
 54#ifdef CONFIG_PCI_MSI
 55static inline void *_pci_root_bus_fwnode(struct pci_bus *bus)
 56{
 57	return to_pci_sysdata(bus)->fwnode;
 58}
 59
 60#define pci_root_bus_fwnode	_pci_root_bus_fwnode
 61#endif
 62
 63#if IS_ENABLED(CONFIG_VMD)
 64static inline bool is_vmd(struct pci_bus *bus)
 65{
 66	return to_pci_sysdata(bus)->vmd_dev != NULL;
 67}
 68#else
 69#define is_vmd(bus)		false
 70#endif /* CONFIG_VMD */
 71
 72/* Can be used to override the logic in pci_scan_bus for skipping
 73   already-configured bus numbers - to be used for buggy BIOSes
 74   or architectures with incomplete PCI setup by the loader */
 75
 76extern unsigned int pcibios_assign_all_busses(void);
 77extern int pci_legacy_init(void);
 78#else
 79static inline int pcibios_assign_all_busses(void) { return 0; }
 80#endif
 81
 82extern unsigned long pci_mem_start;
 83#define PCIBIOS_MIN_IO		0x1000
 84#define PCIBIOS_MIN_MEM		(pci_mem_start)
 85
 86#define PCIBIOS_MIN_CARDBUS_IO	0x4000
 87
 88extern int pcibios_enabled;
 89void pcibios_scan_root(int bus);
 90
 91struct irq_routing_table *pcibios_get_irq_routing_table(void);
 92int pcibios_set_irq_routing(struct pci_dev *dev, int pin, int irq);
 93
 94bool pci_dev_has_default_msi_parent_domain(struct pci_dev *dev);
 95
 96#define HAVE_PCI_MMAP
 97#define arch_can_pci_mmap_wc()	pat_enabled()
 98#define ARCH_GENERIC_PCI_MMAP_RESOURCE
 99
100#ifdef CONFIG_PCI
101extern void early_quirks(void);
102#else
103static inline void early_quirks(void) { }
104#endif
105
106extern void pci_iommu_alloc(void);
107
108#ifdef CONFIG_NUMA
109/* Returns the node based on pci bus */
110static inline int __pcibus_to_node(const struct pci_bus *bus)
111{
112	return to_pci_sysdata(bus)->node;
113}
114
115static inline const struct cpumask *
116cpumask_of_pcibus(const struct pci_bus *bus)
117{
118	int node;
119
120	node = __pcibus_to_node(bus);
121	return (node == NUMA_NO_NODE) ? cpu_online_mask :
122			      cpumask_of_node(node);
123}
124#endif
125
126#endif /* _ASM_X86_PCI_H */