tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __ALPHA_PCI_H
3#define __ALPHA_PCI_H
4
5#ifdef __KERNEL__
6
7#include <linux/spinlock.h>
8#include <linux/dma-mapping.h>
9#include <linux/scatterlist.h>
10#include <asm/machvec.h>
11
12/*
13 * The following structure is used to manage multiple PCI busses.
14 */
15
16struct pci_iommu_arena;
17struct page;
18
19/* A controller. Used to manage multiple PCI busses. */
20
21struct pci_controller {
22 struct pci_controller *next;
23 struct pci_bus *bus;
24 struct resource *io_space;
25 struct resource *mem_space;
26
27 /* The following are for reporting to userland. The invariant is
28 that if we report a BWX-capable dense memory, we do not report
29 a sparse memory at all, even if it exists. */
30 unsigned long sparse_mem_base;
31 unsigned long dense_mem_base;
32 unsigned long sparse_io_base;
33 unsigned long dense_io_base;
34
35 /* This one's for the kernel only. It's in KSEG somewhere. */
36 unsigned long config_space_base;
37
38 unsigned int index;
39 /* For compatibility with current (as of July 2003) pciutils
40 and XFree86. Eventually will be removed. */
41 unsigned int need_domain_info;
42
43 struct pci_iommu_arena *sg_pci;
44 struct pci_iommu_arena *sg_isa;
45
46 void *sysdata;
47};
48
49/* Override the logic in pci_scan_bus for skipping already-configured
50 bus numbers. */
51
52#define pcibios_assign_all_busses() 1
53
54#define PCIBIOS_MIN_IO alpha_mv.min_io_address
55#define PCIBIOS_MIN_MEM alpha_mv.min_mem_address
56
57/* IOMMU controls. */
58
59/* The PCI address space does not equal the physical memory address space.
60 The networking and block device layers use this boolean for bounce buffer
61 decisions. */
62#define PCI_DMA_BUS_IS_PHYS 0
63
64/* TODO: integrate with include/asm-generic/pci.h ? */
65static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
66{
67 return channel ? 15 : 14;
68}
69
70#define pci_domain_nr(bus) ((struct pci_controller *)(bus)->sysdata)->index
71
72static inline int pci_proc_domain(struct pci_bus *bus)
73{
74 struct pci_controller *hose = bus->sysdata;
75 return hose->need_domain_info;
76}
77
78#endif /* __KERNEL__ */
79
80/* Values for the `which' argument to sys_pciconfig_iobase. */
81#define IOBASE_HOSE 0
82#define IOBASE_SPARSE_MEM 1
83#define IOBASE_DENSE_MEM 2
84#define IOBASE_SPARSE_IO 3
85#define IOBASE_DENSE_IO 4
86#define IOBASE_ROOT_BUS 5
87#define IOBASE_FROM_HOSE 0x10000
88
89extern struct pci_dev *isa_bridge;
90
91extern int pci_legacy_read(struct pci_bus *bus, loff_t port, u32 *val,
92 size_t count);
93extern int pci_legacy_write(struct pci_bus *bus, loff_t port, u32 val,
94 size_t count);
95extern int pci_mmap_legacy_page_range(struct pci_bus *bus,
96 struct vm_area_struct *vma,
97 enum pci_mmap_state mmap_state);
98extern void pci_adjust_legacy_attr(struct pci_bus *bus,
99 enum pci_mmap_state mmap_type);
100#define HAVE_PCI_LEGACY 1
101
102extern int pci_create_resource_files(struct pci_dev *dev);
103extern void pci_remove_resource_files(struct pci_dev *dev);
104
105#endif /* __ALPHA_PCI_H */