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1da177e4 LT |
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 | ||
1da177e4 LT |
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 | ||
21 | /* | |
22 | * Each pci channel is a top-level PCI bus seem by CPU. A machine with | |
23 | * multiple PCI channels may have multiple PCI host controllers or a | |
24 | * single controller supporting multiple channels. | |
25 | */ | |
26 | struct pci_controller { | |
27 | struct pci_controller *next; | |
28 | struct pci_bus *bus; | |
29 | ||
30 | struct pci_ops *pci_ops; | |
31 | struct resource *mem_resource; | |
32 | unsigned long mem_offset; | |
33 | struct resource *io_resource; | |
34 | unsigned long io_offset; | |
140c1729 | 35 | unsigned long io_map_base; |
1da177e4 LT |
36 | |
37 | unsigned int index; | |
38 | /* For compatibility with current (as of July 2003) pciutils | |
39 | and XFree86. Eventually will be removed. */ | |
40 | unsigned int need_domain_info; | |
41 | ||
42 | int iommu; | |
8a1417de AI |
43 | |
44 | /* Optional access methods for reading/writing the bus number | |
45 | of the PCI controller */ | |
46 | int (*get_busno)(void); | |
47 | void (*set_busno)(int busno); | |
1da177e4 LT |
48 | }; |
49 | ||
50 | /* | |
51 | * Used by boards to register their PCI busses before the actual scanning. | |
52 | */ | |
53 | extern struct pci_controller * alloc_pci_controller(void); | |
54 | extern void register_pci_controller(struct pci_controller *hose); | |
55 | ||
56 | /* | |
57 | * board supplied pci irq fixup routine | |
58 | */ | |
19df0d11 | 59 | extern int pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin); |
1da177e4 LT |
60 | |
61 | ||
62 | /* Can be used to override the logic in pci_scan_bus for skipping | |
63 | already-configured bus numbers - to be used for buggy BIOSes | |
64 | or architectures with incomplete PCI setup by the loader */ | |
65 | ||
66 | extern unsigned int pcibios_assign_all_busses(void); | |
67 | ||
68 | #define pcibios_scan_all_fns(a, b) 0 | |
69 | ||
70 | extern unsigned long PCIBIOS_MIN_IO; | |
71 | extern unsigned long PCIBIOS_MIN_MEM; | |
72 | ||
73 | #define PCIBIOS_MIN_CARDBUS_IO 0x4000 | |
74 | ||
75 | extern void pcibios_set_master(struct pci_dev *dev); | |
76 | ||
c9c3e457 | 77 | static inline void pcibios_penalize_isa_irq(int irq, int active) |
1da177e4 LT |
78 | { |
79 | /* We don't do dynamic PCI IRQ allocation */ | |
80 | } | |
81 | ||
82 | /* | |
83 | * Dynamic DMA mapping stuff. | |
84 | * MIPS has everything mapped statically. | |
85 | */ | |
86 | ||
87 | #include <linux/types.h> | |
88 | #include <linux/slab.h> | |
89 | #include <asm/scatterlist.h> | |
90 | #include <linux/string.h> | |
91 | #include <asm/io.h> | |
92 | ||
93 | struct pci_dev; | |
94 | ||
95 | /* | |
96 | * The PCI address space does equal the physical memory address space. The | |
97 | * networking and block device layers use this boolean for bounce buffer | |
98 | * decisions. This is set if any hose does not have an IOMMU. | |
99 | */ | |
100 | extern unsigned int PCI_DMA_BUS_IS_PHYS; | |
101 | ||
4ce588cd | 102 | #ifdef CONFIG_DMA_NEED_PCI_MAP_STATE |
1da177e4 LT |
103 | |
104 | /* pci_unmap_{single,page} is not a nop, thus... */ | |
105 | #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME) dma_addr_t ADDR_NAME; | |
106 | #define DECLARE_PCI_UNMAP_LEN(LEN_NAME) __u32 LEN_NAME; | |
107 | #define pci_unmap_addr(PTR, ADDR_NAME) ((PTR)->ADDR_NAME) | |
108 | #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) (((PTR)->ADDR_NAME) = (VAL)) | |
109 | #define pci_unmap_len(PTR, LEN_NAME) ((PTR)->LEN_NAME) | |
110 | #define pci_unmap_len_set(PTR, LEN_NAME, VAL) (((PTR)->LEN_NAME) = (VAL)) | |
111 | ||
4ce588cd | 112 | #else /* CONFIG_DMA_NEED_PCI_MAP_STATE */ |
1da177e4 LT |
113 | |
114 | /* pci_unmap_{page,single} is a nop so... */ | |
115 | #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME) | |
116 | #define DECLARE_PCI_UNMAP_LEN(LEN_NAME) | |
117 | #define pci_unmap_addr(PTR, ADDR_NAME) (0) | |
118 | #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) do { } while (0) | |
119 | #define pci_unmap_len(PTR, LEN_NAME) (0) | |
120 | #define pci_unmap_len_set(PTR, LEN_NAME, VAL) do { } while (0) | |
121 | ||
4ce588cd | 122 | #endif /* CONFIG_DMA_NEED_PCI_MAP_STATE */ |
1da177e4 | 123 | |
bb4a61b6 | 124 | #ifdef CONFIG_PCI |
e24c2d96 DM |
125 | static inline void pci_dma_burst_advice(struct pci_dev *pdev, |
126 | enum pci_dma_burst_strategy *strat, | |
127 | unsigned long *strategy_parameter) | |
128 | { | |
129 | *strat = PCI_DMA_BURST_INFINITY; | |
130 | *strategy_parameter = ~0UL; | |
131 | } | |
bb4a61b6 | 132 | #endif |
e24c2d96 | 133 | |
1da177e4 LT |
134 | extern void pcibios_resource_to_bus(struct pci_dev *dev, |
135 | struct pci_bus_region *region, struct resource *res); | |
870d3d98 RB |
136 | |
137 | extern void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res, | |
138 | struct pci_bus_region *region); | |
139 | ||
140 | static inline struct resource * | |
141 | pcibios_select_root(struct pci_dev *pdev, struct resource *res) | |
142 | { | |
143 | struct resource *root = NULL; | |
144 | ||
145 | if (res->flags & IORESOURCE_IO) | |
146 | root = &ioport_resource; | |
147 | if (res->flags & IORESOURCE_MEM) | |
148 | root = &iomem_resource; | |
149 | ||
150 | return root; | |
151 | } | |
1da177e4 LT |
152 | |
153 | #ifdef CONFIG_PCI_DOMAINS | |
154 | ||
155 | #define pci_domain_nr(bus) ((struct pci_controller *)(bus)->sysdata)->index | |
156 | ||
157 | static inline int pci_proc_domain(struct pci_bus *bus) | |
158 | { | |
159 | struct pci_controller *hose = bus->sysdata; | |
160 | return hose->need_domain_info; | |
161 | } | |
162 | ||
163 | #endif /* CONFIG_PCI_DOMAINS */ | |
164 | ||
165 | #endif /* __KERNEL__ */ | |
166 | ||
167 | /* implement the pci_ DMA API in terms of the generic device dma_ one */ | |
168 | #include <asm-generic/pci-dma-compat.h> | |
169 | ||
1da177e4 LT |
170 | /* Do platform specific device initialization at pci_enable_device() time */ |
171 | extern int pcibios_plat_dev_init(struct pci_dev *dev); | |
172 | ||
5b1d221e RB |
173 | /* Chances are this interrupt is wired PC-style ... */ |
174 | static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel) | |
175 | { | |
176 | return channel ? 15 : 14; | |
177 | } | |
178 | ||
1da177e4 | 179 | #endif /* _ASM_PCI_H */ |