tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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_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};
24
25extern int pci_routeirq;
26extern int noioapicquirk;
27extern int noioapicreroute;
28
29/* scan a bus after allocating a pci_sysdata for it */
30extern struct pci_bus *pci_scan_bus_on_node(int busno, struct pci_ops *ops,
31 int node);
32extern struct pci_bus *pci_scan_bus_with_sysdata(int busno);
33
34#ifdef CONFIG_PCI
35
36#ifdef CONFIG_PCI_DOMAINS
37static inline int pci_domain_nr(struct pci_bus *bus)
38{
39 struct pci_sysdata *sd = bus->sysdata;
40 return sd->domain;
41}
42
43static inline int pci_proc_domain(struct pci_bus *bus)
44{
45 return pci_domain_nr(bus);
46}
47#endif
48
49/* Can be used to override the logic in pci_scan_bus for skipping
50 already-configured bus numbers - to be used for buggy BIOSes
51 or architectures with incomplete PCI setup by the loader */
52
53extern unsigned int pcibios_assign_all_busses(void);
54extern int pci_legacy_init(void);
55# ifdef CONFIG_ACPI
56# define x86_default_pci_init pci_acpi_init
57# else
58# define x86_default_pci_init pci_legacy_init
59# endif
60#else
61# define pcibios_assign_all_busses() 0
62# define x86_default_pci_init NULL
63#endif
64
65extern unsigned long pci_mem_start;
66#define PCIBIOS_MIN_IO 0x1000
67#define PCIBIOS_MIN_MEM (pci_mem_start)
68
69#define PCIBIOS_MIN_CARDBUS_IO 0x4000
70
71extern int pcibios_enabled;
72void pcibios_config_init(void);
73struct pci_bus *pcibios_scan_root(int bus);
74
75void pcibios_set_master(struct pci_dev *dev);
76void pcibios_penalize_isa_irq(int irq, int active);
77struct irq_routing_table *pcibios_get_irq_routing_table(void);
78int pcibios_set_irq_routing(struct pci_dev *dev, int pin, int irq);
79
80
81#define HAVE_PCI_MMAP
82extern int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
83 enum pci_mmap_state mmap_state,
84 int write_combine);
85
86
87#ifdef CONFIG_PCI
88extern void early_quirks(void);
89static inline void pci_dma_burst_advice(struct pci_dev *pdev,
90 enum pci_dma_burst_strategy *strat,
91 unsigned long *strategy_parameter)
92{
93 *strat = PCI_DMA_BURST_INFINITY;
94 *strategy_parameter = ~0UL;
95}
96#else
97static inline void early_quirks(void) { }
98#endif
99
100extern void pci_iommu_alloc(void);
101
102#ifdef CONFIG_PCI_MSI
103/* implemented in arch/x86/kernel/apic/io_apic. */
104struct msi_desc;
105int native_setup_msi_irqs(struct pci_dev *dev, int nvec, int type);
106void native_teardown_msi_irq(unsigned int irq);
107void native_restore_msi_irqs(struct pci_dev *dev);
108int setup_msi_irq(struct pci_dev *dev, struct msi_desc *msidesc,
109 unsigned int irq_base, unsigned int irq_offset);
110#else
111#define native_setup_msi_irqs NULL
112#define native_teardown_msi_irq NULL
113#endif
114
115#define PCI_DMA_BUS_IS_PHYS (dma_ops->is_phys)
116
117#endif /* __KERNEL__ */
118
119#ifdef CONFIG_X86_64
120#include <asm/pci_64.h>
121#endif
122
123/* implement the pci_ DMA API in terms of the generic device dma_ one */
124#include <asm-generic/pci-dma-compat.h>
125
126/* generic pci stuff */
127#include <asm-generic/pci.h>
128
129#ifdef CONFIG_NUMA
130/* Returns the node based on pci bus */
131static inline int __pcibus_to_node(const struct pci_bus *bus)
132{
133 const struct pci_sysdata *sd = bus->sysdata;
134
135 return sd->node;
136}
137
138static inline const struct cpumask *
139cpumask_of_pcibus(const struct pci_bus *bus)
140{
141 int node;
142
143 node = __pcibus_to_node(bus);
144 return (node == -1) ? cpu_online_mask :
145 cpumask_of_node(node);
146}
147#endif
148
149struct pci_setup_rom {
150 struct setup_data data;
151 uint16_t vendor;
152 uint16_t devid;
153 uint64_t pcilen;
154 unsigned long segment;
155 unsigned long bus;
156 unsigned long device;
157 unsigned long function;
158 uint8_t romdata[0];
159};
160
161#endif /* _ASM_X86_PCI_H */