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/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 */
6#ifndef _ASM_PCI_H
7#define _ASM_PCI_H
8
9#include <linux/mm.h>
10
11#ifdef __KERNEL__
12
13/*
14 * This file essentially defines the interface between board
15 * specific PCI code and MIPS common PCI code. Should potentially put
16 * into include/asm/pci.h file.
17 */
18
19#include <linux/ioport.h>
20#include <linux/of.h>
21
22/*
23 * Each pci channel is a top-level PCI bus seem by CPU. A machine with
24 * multiple PCI channels may have multiple PCI host controllers or a
25 * single controller supporting multiple channels.
26 */
27struct pci_controller {
28 struct pci_controller *next;
29 struct pci_bus *bus;
30 struct device_node *of_node;
31
32 struct pci_ops *pci_ops;
33 struct resource *mem_resource;
34 unsigned long mem_offset;
35 struct resource *io_resource;
36 unsigned long io_offset;
37 unsigned long io_map_base;
38
39 unsigned int index;
40 /* For compatibility with current (as of July 2003) pciutils
41 and XFree86. Eventually will be removed. */
42 unsigned int need_domain_info;
43
44 int iommu;
45
46 /* Optional access methods for reading/writing the bus number
47 of the PCI controller */
48 int (*get_busno)(void);
49 void (*set_busno)(int busno);
50};
51
52/*
53 * Used by boards to register their PCI busses before the actual scanning.
54 */
55extern struct pci_controller * alloc_pci_controller(void);
56extern void register_pci_controller(struct pci_controller *hose);
57
58/*
59 * board supplied pci irq fixup routine
60 */
61extern int pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin);
62
63
64/* Can be used to override the logic in pci_scan_bus for skipping
65 already-configured bus numbers - to be used for buggy BIOSes
66 or architectures with incomplete PCI setup by the loader */
67
68extern unsigned int pcibios_assign_all_busses(void);
69
70extern unsigned long PCIBIOS_MIN_IO;
71extern unsigned long PCIBIOS_MIN_MEM;
72
73#define PCIBIOS_MIN_CARDBUS_IO 0x4000
74
75extern void pcibios_set_master(struct pci_dev *dev);
76
77static inline void pcibios_penalize_isa_irq(int irq, int active)
78{
79 /* We don't do dynamic PCI IRQ allocation */
80}
81
82#define HAVE_PCI_MMAP
83
84extern int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
85 enum pci_mmap_state mmap_state, int write_combine);
86
87/*
88 * Dynamic DMA mapping stuff.
89 * MIPS has everything mapped statically.
90 */
91
92#include <linux/types.h>
93#include <linux/slab.h>
94#include <asm/scatterlist.h>
95#include <linux/string.h>
96#include <asm/io.h>
97#include <asm-generic/pci-bridge.h>
98
99struct pci_dev;
100
101/*
102 * The PCI address space does equal the physical memory address space. The
103 * networking and block device layers use this boolean for bounce buffer
104 * decisions. This is set if any hose does not have an IOMMU.
105 */
106extern unsigned int PCI_DMA_BUS_IS_PHYS;
107
108#ifdef CONFIG_PCI
109static inline void pci_dma_burst_advice(struct pci_dev *pdev,
110 enum pci_dma_burst_strategy *strat,
111 unsigned long *strategy_parameter)
112{
113 *strat = PCI_DMA_BURST_INFINITY;
114 *strategy_parameter = ~0UL;
115}
116#endif
117
118#define pci_domain_nr(bus) ((struct pci_controller *)(bus)->sysdata)->index
119
120static inline int pci_proc_domain(struct pci_bus *bus)
121{
122 struct pci_controller *hose = bus->sysdata;
123 return hose->need_domain_info;
124}
125
126#endif /* __KERNEL__ */
127
128/* implement the pci_ DMA API in terms of the generic device dma_ one */
129#include <asm-generic/pci-dma-compat.h>
130
131/* Do platform specific device initialization at pci_enable_device() time */
132extern int pcibios_plat_dev_init(struct pci_dev *dev);
133
134/* Chances are this interrupt is wired PC-style ... */
135static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
136{
137 return channel ? 15 : 14;
138}
139
140#ifdef CONFIG_CPU_CAVIUM_OCTEON
141/* MSI arch hook for OCTEON */
142#define arch_setup_msi_irqs arch_setup_msi_irqs
143#endif
144
145extern char * (*pcibios_plat_setup)(char *str);
146
147#ifdef CONFIG_OF
148/* this function parses memory ranges from a device node */
149extern void pci_load_of_ranges(struct pci_controller *hose,
150 struct device_node *node);
151#else
152static inline void pci_load_of_ranges(struct pci_controller *hose,
153 struct device_node *node) {}
154#endif
155
156#endif /* _ASM_PCI_H */