tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#ifndef __ALPHA_PCI_H
2#define __ALPHA_PCI_H
3
4#ifdef __KERNEL__
5
6#include <linux/spinlock.h>
7#include <linux/dma-mapping.h>
8#include <asm/scatterlist.h>
9#include <asm/machvec.h>
10
11/*
12 * The following structure is used to manage multiple PCI busses.
13 */
14
15struct pci_dev;
16struct pci_bus;
17struct resource;
18struct pci_iommu_arena;
19struct page;
20
21/* A controller. Used to manage multiple PCI busses. */
22
23struct pci_controller {
24 struct pci_controller *next;
25 struct pci_bus *bus;
26 struct resource *io_space;
27 struct resource *mem_space;
28
29 /* The following are for reporting to userland. The invariant is
30 that if we report a BWX-capable dense memory, we do not report
31 a sparse memory at all, even if it exists. */
32 unsigned long sparse_mem_base;
33 unsigned long dense_mem_base;
34 unsigned long sparse_io_base;
35 unsigned long dense_io_base;
36
37 /* This one's for the kernel only. It's in KSEG somewhere. */
38 unsigned long config_space_base;
39
40 unsigned int index;
41 /* For compatibility with current (as of July 2003) pciutils
42 and XFree86. Eventually will be removed. */
43 unsigned int need_domain_info;
44
45 struct pci_iommu_arena *sg_pci;
46 struct pci_iommu_arena *sg_isa;
47
48 void *sysdata;
49};
50
51/* Override the logic in pci_scan_bus for skipping already-configured
52 bus numbers. */
53
54#define pcibios_assign_all_busses() 1
55
56#define PCIBIOS_MIN_IO alpha_mv.min_io_address
57#define PCIBIOS_MIN_MEM alpha_mv.min_mem_address
58
59extern void pcibios_set_master(struct pci_dev *dev);
60
61extern inline void pcibios_penalize_isa_irq(int irq, int active)
62{
63 /* We don't do dynamic PCI IRQ allocation */
64}
65
66/* IOMMU controls. */
67
68/* The PCI address space does not equal the physical memory address space.
69 The networking and block device layers use this boolean for bounce buffer
70 decisions. */
71#define PCI_DMA_BUS_IS_PHYS 0
72
73#ifdef CONFIG_PCI
74
75/* implement the pci_ DMA API in terms of the generic device dma_ one */
76#include <asm-generic/pci-dma-compat.h>
77
78static inline void pci_dma_burst_advice(struct pci_dev *pdev,
79 enum pci_dma_burst_strategy *strat,
80 unsigned long *strategy_parameter)
81{
82 unsigned long cacheline_size;
83 u8 byte;
84
85 pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &byte);
86 if (byte == 0)
87 cacheline_size = 1024;
88 else
89 cacheline_size = (int) byte * 4;
90
91 *strat = PCI_DMA_BURST_BOUNDARY;
92 *strategy_parameter = cacheline_size;
93}
94#endif
95
96/* TODO: integrate with include/asm-generic/pci.h ? */
97static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
98{
99 return channel ? 15 : 14;
100}
101
102extern void pcibios_resource_to_bus(struct pci_dev *, struct pci_bus_region *,
103 struct resource *);
104
105extern void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
106 struct pci_bus_region *region);
107
108#define pci_domain_nr(bus) ((struct pci_controller *)(bus)->sysdata)->index
109
110static inline int pci_proc_domain(struct pci_bus *bus)
111{
112 struct pci_controller *hose = bus->sysdata;
113 return hose->need_domain_info;
114}
115
116#endif /* __KERNEL__ */
117
118/* Values for the `which' argument to sys_pciconfig_iobase. */
119#define IOBASE_HOSE 0
120#define IOBASE_SPARSE_MEM 1
121#define IOBASE_DENSE_MEM 2
122#define IOBASE_SPARSE_IO 3
123#define IOBASE_DENSE_IO 4
124#define IOBASE_ROOT_BUS 5
125#define IOBASE_FROM_HOSE 0x10000
126
127extern struct pci_dev *isa_bridge;
128
129extern int pci_legacy_read(struct pci_bus *bus, loff_t port, u32 *val,
130 size_t count);
131extern int pci_legacy_write(struct pci_bus *bus, loff_t port, u32 val,
132 size_t count);
133extern int pci_mmap_legacy_page_range(struct pci_bus *bus,
134 struct vm_area_struct *vma,
135 enum pci_mmap_state mmap_state);
136extern void pci_adjust_legacy_attr(struct pci_bus *bus,
137 enum pci_mmap_state mmap_type);
138#define HAVE_PCI_LEGACY 1
139
140extern int pci_create_resource_files(struct pci_dev *dev);
141extern void pci_remove_resource_files(struct pci_dev *dev);
142
143#endif /* __ALPHA_PCI_H */