pci.h revision a6c140969b4685f9b9f6773c0760f55ca66d1825 
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
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 */
26struct 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;
35	unsigned long io_map_base;
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;
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);
48};
49
50/*
51 * Used by boards to register their PCI busses before the actual scanning.
52 */
53extern struct pci_controller * alloc_pci_controller(void);
54extern void register_pci_controller(struct pci_controller *hose);
55
56/*
57 * board supplied pci irq fixup routine
58 */
59extern int pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin);
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
66extern unsigned int pcibios_assign_all_busses(void);
67
68#define pcibios_scan_all_fns(a, b)	0
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
98struct pci_dev;
99
100/*
101 * The PCI address space does equal the physical memory address space.  The
102 * networking and block device layers use this boolean for bounce buffer
103 * decisions.  This is set if any hose does not have an IOMMU.
104 */
105extern unsigned int PCI_DMA_BUS_IS_PHYS;
106
107#ifdef CONFIG_DMA_NEED_PCI_MAP_STATE
108
109/* pci_unmap_{single,page} is not a nop, thus... */
110#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)	dma_addr_t ADDR_NAME;
111#define DECLARE_PCI_UNMAP_LEN(LEN_NAME)		__u32 LEN_NAME;
112#define pci_unmap_addr(PTR, ADDR_NAME)		((PTR)->ADDR_NAME)
113#define pci_unmap_addr_set(PTR, ADDR_NAME, VAL)	(((PTR)->ADDR_NAME) = (VAL))
114#define pci_unmap_len(PTR, LEN_NAME)		((PTR)->LEN_NAME)
115#define pci_unmap_len_set(PTR, LEN_NAME, VAL)	(((PTR)->LEN_NAME) = (VAL))
116
117#else /* CONFIG_DMA_NEED_PCI_MAP_STATE  */
118
119/* pci_unmap_{page,single} is a nop so... */
120#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)
121#define DECLARE_PCI_UNMAP_LEN(LEN_NAME)
122#define pci_unmap_addr(PTR, ADDR_NAME)		(0)
123#define pci_unmap_addr_set(PTR, ADDR_NAME, VAL)	do { } while (0)
124#define pci_unmap_len(PTR, LEN_NAME)		(0)
125#define pci_unmap_len_set(PTR, LEN_NAME, VAL)	do { } while (0)
126
127#endif /* CONFIG_DMA_NEED_PCI_MAP_STATE  */
128
129#ifdef CONFIG_PCI
130static inline void pci_dma_burst_advice(struct pci_dev *pdev,
131					enum pci_dma_burst_strategy *strat,
132					unsigned long *strategy_parameter)
133{
134	*strat = PCI_DMA_BURST_INFINITY;
135	*strategy_parameter = ~0UL;
136}
137#endif
138
139extern void pcibios_resource_to_bus(struct pci_dev *dev,
140	struct pci_bus_region *region, struct resource *res);
141
142extern void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
143				    struct pci_bus_region *region);
144
145#define pci_domain_nr(bus) ((struct pci_controller *)(bus)->sysdata)->index
146
147static inline int pci_proc_domain(struct pci_bus *bus)
148{
149	struct pci_controller *hose = bus->sysdata;
150	return hose->need_domain_info;
151}
152
153#endif /* __KERNEL__ */
154
155/* implement the pci_ DMA API in terms of the generic device dma_ one */
156#include <asm-generic/pci-dma-compat.h>
157
158/* Do platform specific device initialization at pci_enable_device() time */
159extern int pcibios_plat_dev_init(struct pci_dev *dev);
160
161/* Chances are this interrupt is wired PC-style ...  */
162static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
163{
164	return channel ? 15 : 14;
165}
166
167extern int pci_probe_only;
168
169extern char * (*pcibios_plat_setup)(char *str);
170
171#endif /* _ASM_PCI_H */
172