arch/x86/include/asm/pci.h at v3.2-rc5

tjh.dev / kernel
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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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kernel / arch / x86 / include / asm / pci.h
at v3.2-rc5 165 lines 4.2 kB view raw
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  1#ifndef _ASM_X86_PCI_H
  2#define _ASM_X86_PCI_H
  3
  4#include <linux/mm.h> /* for struct page */
  5#include <linux/types.h>
  6#include <linux/slab.h>
  7#include <linux/string.h>
  8#include <asm/scatterlist.h>
  9#include <asm/io.h>
 10#include <asm/x86_init.h>
 11
 12#ifdef __KERNEL__
 13
 14struct pci_sysdata {
 15	int		domain;		/* PCI domain */
 16	int		node;		/* NUMA node */
 17#ifdef CONFIG_X86_64
 18	void		*iommu;		/* IOMMU private data */
 19#endif
 20};
 21
 22extern int pci_routeirq;
 23extern int noioapicquirk;
 24extern int noioapicreroute;
 25
 26/* scan a bus after allocating a pci_sysdata for it */
 27extern struct pci_bus *pci_scan_bus_on_node(int busno, struct pci_ops *ops,
 28					    int node);
 29extern struct pci_bus *pci_scan_bus_with_sysdata(int busno);
 30
 31#ifdef CONFIG_PCI
 32
 33#ifdef CONFIG_PCI_DOMAINS
 34static inline int pci_domain_nr(struct pci_bus *bus)
 35{
 36	struct pci_sysdata *sd = bus->sysdata;
 37	return sd->domain;
 38}
 39
 40static inline int pci_proc_domain(struct pci_bus *bus)
 41{
 42	return pci_domain_nr(bus);
 43}
 44#endif
 45
 46/* Can be used to override the logic in pci_scan_bus for skipping
 47   already-configured bus numbers - to be used for buggy BIOSes
 48   or architectures with incomplete PCI setup by the loader */
 49
 50extern unsigned int pcibios_assign_all_busses(void);
 51extern int pci_legacy_init(void);
 52# ifdef CONFIG_ACPI
 53#  define x86_default_pci_init pci_acpi_init
 54# else
 55#  define x86_default_pci_init pci_legacy_init
 56# endif
 57#else
 58# define pcibios_assign_all_busses()	0
 59# define x86_default_pci_init		NULL
 60#endif
 61
 62extern unsigned long pci_mem_start;
 63#define PCIBIOS_MIN_IO		0x1000
 64#define PCIBIOS_MIN_MEM		(pci_mem_start)
 65
 66#define PCIBIOS_MIN_CARDBUS_IO	0x4000
 67
 68extern int pcibios_enabled;
 69void pcibios_config_init(void);
 70struct pci_bus *pcibios_scan_root(int bus);
 71
 72void pcibios_set_master(struct pci_dev *dev);
 73void pcibios_penalize_isa_irq(int irq, int active);
 74struct irq_routing_table *pcibios_get_irq_routing_table(void);
 75int pcibios_set_irq_routing(struct pci_dev *dev, int pin, int irq);
 76
 77
 78#define HAVE_PCI_MMAP
 79extern int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
 80			       enum pci_mmap_state mmap_state,
 81			       int write_combine);
 82
 83
 84#ifdef CONFIG_PCI
 85extern void early_quirks(void);
 86static inline void pci_dma_burst_advice(struct pci_dev *pdev,
 87					enum pci_dma_burst_strategy *strat,
 88					unsigned long *strategy_parameter)
 89{
 90	*strat = PCI_DMA_BURST_INFINITY;
 91	*strategy_parameter = ~0UL;
 92}
 93#else
 94static inline void early_quirks(void) { }
 95#endif
 96
 97extern void pci_iommu_alloc(void);
 98
 99#ifdef CONFIG_PCI_MSI
100/* MSI arch specific hooks */
101static inline int x86_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
102{
103	return x86_msi.setup_msi_irqs(dev, nvec, type);
104}
105
106static inline void x86_teardown_msi_irqs(struct pci_dev *dev)
107{
108	x86_msi.teardown_msi_irqs(dev);
109}
110
111static inline void x86_teardown_msi_irq(unsigned int irq)
112{
113	x86_msi.teardown_msi_irq(irq);
114}
115#define arch_setup_msi_irqs x86_setup_msi_irqs
116#define arch_teardown_msi_irqs x86_teardown_msi_irqs
117#define arch_teardown_msi_irq x86_teardown_msi_irq
118/* implemented in arch/x86/kernel/apic/io_apic. */
119int native_setup_msi_irqs(struct pci_dev *dev, int nvec, int type);
120void native_teardown_msi_irq(unsigned int irq);
121/* default to the implementation in drivers/lib/msi.c */
122#define HAVE_DEFAULT_MSI_TEARDOWN_IRQS
123void default_teardown_msi_irqs(struct pci_dev *dev);
124#else
125#define native_setup_msi_irqs		NULL
126#define native_teardown_msi_irq		NULL
127#define default_teardown_msi_irqs	NULL
128#endif
129
130#define PCI_DMA_BUS_IS_PHYS (dma_ops->is_phys)
131
132#endif  /* __KERNEL__ */
133
134#ifdef CONFIG_X86_64
135#include "pci_64.h"
136#endif
137
138/* implement the pci_ DMA API in terms of the generic device dma_ one */
139#include <asm-generic/pci-dma-compat.h>
140
141/* generic pci stuff */
142#include <asm-generic/pci.h>
143#define PCIBIOS_MAX_MEM_32 0xffffffff
144
145#ifdef CONFIG_NUMA
146/* Returns the node based on pci bus */
147static inline int __pcibus_to_node(const struct pci_bus *bus)
148{
149	const struct pci_sysdata *sd = bus->sysdata;
150
151	return sd->node;
152}
153
154static inline const struct cpumask *
155cpumask_of_pcibus(const struct pci_bus *bus)
156{
157	int node;
158
159	node = __pcibus_to_node(bus);
160	return (node == -1) ? cpu_online_mask :
161			      cpumask_of_node(node);
162}
163#endif
164
165#endif /* _ASM_X86_PCI_H */
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