tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
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/config.h>
10#include <linux/mm.h>
11
12#ifdef __KERNEL__
13
14/*
15 * This file essentially defines the interface between board
16 * specific PCI code and MIPS common PCI code. Should potentially put
17 * into include/asm/pci.h file.
18 */
19
20#include <linux/ioport.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
31 struct pci_ops *pci_ops;
32 struct resource *mem_resource;
33 unsigned long mem_offset;
34 struct resource *io_resource;
35 unsigned long io_offset;
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
45/*
46 * Used by boards to register their PCI busses before the actual scanning.
47 */
48extern struct pci_controller * alloc_pci_controller(void);
49extern void register_pci_controller(struct pci_controller *hose);
50
51/*
52 * board supplied pci irq fixup routine
53 */
54extern int pcibios_map_irq(struct pci_dev *dev, u8 slot, u8 pin);
55
56
57/* Can be used to override the logic in pci_scan_bus for skipping
58 already-configured bus numbers - to be used for buggy BIOSes
59 or architectures with incomplete PCI setup by the loader */
60
61extern unsigned int pcibios_assign_all_busses(void);
62
63#define pcibios_scan_all_fns(a, b) 0
64
65extern unsigned long PCIBIOS_MIN_IO;
66extern unsigned long PCIBIOS_MIN_MEM;
67
68#define PCIBIOS_MIN_CARDBUS_IO 0x4000
69
70extern void pcibios_set_master(struct pci_dev *dev);
71
72static inline void pcibios_penalize_isa_irq(int irq, int active)
73{
74 /* We don't do dynamic PCI IRQ allocation */
75}
76
77/*
78 * Dynamic DMA mapping stuff.
79 * MIPS has everything mapped statically.
80 */
81
82#include <linux/types.h>
83#include <linux/slab.h>
84#include <asm/scatterlist.h>
85#include <linux/string.h>
86#include <asm/io.h>
87
88struct pci_dev;
89
90/*
91 * The PCI address space does equal the physical memory address space. The
92 * networking and block device layers use this boolean for bounce buffer
93 * decisions. This is set if any hose does not have an IOMMU.
94 */
95extern unsigned int PCI_DMA_BUS_IS_PHYS;
96
97#ifdef CONFIG_MAPPED_DMA_IO
98
99/* pci_unmap_{single,page} is not a nop, thus... */
100#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME) dma_addr_t ADDR_NAME;
101#define DECLARE_PCI_UNMAP_LEN(LEN_NAME) __u32 LEN_NAME;
102#define pci_unmap_addr(PTR, ADDR_NAME) ((PTR)->ADDR_NAME)
103#define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) (((PTR)->ADDR_NAME) = (VAL))
104#define pci_unmap_len(PTR, LEN_NAME) ((PTR)->LEN_NAME)
105#define pci_unmap_len_set(PTR, LEN_NAME, VAL) (((PTR)->LEN_NAME) = (VAL))
106
107#else /* CONFIG_MAPPED_DMA_IO */
108
109/* pci_unmap_{page,single} is a nop so... */
110#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)
111#define DECLARE_PCI_UNMAP_LEN(LEN_NAME)
112#define pci_unmap_addr(PTR, ADDR_NAME) (0)
113#define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) do { } while (0)
114#define pci_unmap_len(PTR, LEN_NAME) (0)
115#define pci_unmap_len_set(PTR, LEN_NAME, VAL) do { } while (0)
116
117#endif /* CONFIG_MAPPED_DMA_IO */
118
119/* This is always fine. */
120#define pci_dac_dma_supported(pci_dev, mask) (1)
121
122extern dma64_addr_t pci_dac_page_to_dma(struct pci_dev *pdev,
123 struct page *page, unsigned long offset, int direction);
124extern struct page *pci_dac_dma_to_page(struct pci_dev *pdev,
125 dma64_addr_t dma_addr);
126extern unsigned long pci_dac_dma_to_offset(struct pci_dev *pdev,
127 dma64_addr_t dma_addr);
128extern void pci_dac_dma_sync_single_for_cpu(struct pci_dev *pdev,
129 dma64_addr_t dma_addr, size_t len, int direction);
130extern void pci_dac_dma_sync_single_for_device(struct pci_dev *pdev,
131 dma64_addr_t dma_addr, size_t len, int direction);
132
133#ifdef CONFIG_PCI
134static inline void pci_dma_burst_advice(struct pci_dev *pdev,
135 enum pci_dma_burst_strategy *strat,
136 unsigned long *strategy_parameter)
137{
138 *strat = PCI_DMA_BURST_INFINITY;
139 *strategy_parameter = ~0UL;
140}
141#endif
142
143extern void pcibios_resource_to_bus(struct pci_dev *dev,
144 struct pci_bus_region *region, struct resource *res);
145
146#ifdef CONFIG_PCI_DOMAINS
147
148#define pci_domain_nr(bus) ((struct pci_controller *)(bus)->sysdata)->index
149
150static inline int pci_proc_domain(struct pci_bus *bus)
151{
152 struct pci_controller *hose = bus->sysdata;
153 return hose->need_domain_info;
154}
155
156#endif /* CONFIG_PCI_DOMAINS */
157
158#endif /* __KERNEL__ */
159
160/* implement the pci_ DMA API in terms of the generic device dma_ one */
161#include <asm-generic/pci-dma-compat.h>
162
163static inline void pcibios_add_platform_entries(struct pci_dev *dev)
164{
165}
166
167/* Do platform specific device initialization at pci_enable_device() time */
168extern int pcibios_plat_dev_init(struct pci_dev *dev);
169
170#endif /* _ASM_PCI_H */