Linux kernel mirror (for testing)
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linux
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __OF_ADDRESS_H
3#define __OF_ADDRESS_H
4#include <linux/ioport.h>
5#include <linux/errno.h>
6#include <linux/of.h>
7#include <linux/io.h>
8
9struct of_bus;
10
11struct of_pci_range_parser {
12 struct device_node *node;
13 struct of_bus *bus;
14 const __be32 *range;
15 const __be32 *end;
16 int na;
17 int ns;
18 int pna;
19 bool dma;
20};
21#define of_range_parser of_pci_range_parser
22
23struct of_pci_range {
24 union {
25 u64 pci_addr;
26 u64 bus_addr;
27 };
28 u64 cpu_addr;
29 u64 size;
30 u32 flags;
31};
32#define of_range of_pci_range
33
34#define for_each_of_pci_range(parser, range) \
35 for (; of_pci_range_parser_one(parser, range);)
36#define for_each_of_range for_each_of_pci_range
37
38/* Translate a DMA address from device space to CPU space */
39extern u64 of_translate_dma_address(struct device_node *dev,
40 const __be32 *in_addr);
41extern const __be32 *of_translate_dma_region(struct device_node *dev, const __be32 *addr,
42 phys_addr_t *start, size_t *length);
43
44#ifdef CONFIG_OF_ADDRESS
45extern u64 of_translate_address(struct device_node *np, const __be32 *addr);
46extern int of_address_to_resource(struct device_node *dev, int index,
47 struct resource *r);
48extern void __iomem *of_iomap(struct device_node *device, int index);
49void __iomem *of_io_request_and_map(struct device_node *device,
50 int index, const char *name);
51
52/* Extract an address from a device, returns the region size and
53 * the address space flags too. The PCI version uses a BAR number
54 * instead of an absolute index
55 */
56extern const __be32 *__of_get_address(struct device_node *dev, int index, int bar_no,
57 u64 *size, unsigned int *flags);
58
59extern int of_pci_range_parser_init(struct of_pci_range_parser *parser,
60 struct device_node *node);
61extern int of_pci_dma_range_parser_init(struct of_pci_range_parser *parser,
62 struct device_node *node);
63extern struct of_pci_range *of_pci_range_parser_one(
64 struct of_pci_range_parser *parser,
65 struct of_pci_range *range);
66extern int of_pci_address_to_resource(struct device_node *dev, int bar,
67 struct resource *r);
68extern int of_pci_range_to_resource(struct of_pci_range *range,
69 struct device_node *np,
70 struct resource *res);
71extern bool of_dma_is_coherent(struct device_node *np);
72#else /* CONFIG_OF_ADDRESS */
73static inline void __iomem *of_io_request_and_map(struct device_node *device,
74 int index, const char *name)
75{
76 return IOMEM_ERR_PTR(-EINVAL);
77}
78
79static inline u64 of_translate_address(struct device_node *np,
80 const __be32 *addr)
81{
82 return OF_BAD_ADDR;
83}
84
85static inline const __be32 *__of_get_address(struct device_node *dev, int index, int bar_no,
86 u64 *size, unsigned int *flags)
87{
88 return NULL;
89}
90
91static inline int of_pci_range_parser_init(struct of_pci_range_parser *parser,
92 struct device_node *node)
93{
94 return -ENOSYS;
95}
96
97static inline int of_pci_dma_range_parser_init(struct of_pci_range_parser *parser,
98 struct device_node *node)
99{
100 return -ENOSYS;
101}
102
103static inline struct of_pci_range *of_pci_range_parser_one(
104 struct of_pci_range_parser *parser,
105 struct of_pci_range *range)
106{
107 return NULL;
108}
109
110static inline int of_pci_address_to_resource(struct device_node *dev, int bar,
111 struct resource *r)
112{
113 return -ENOSYS;
114}
115
116static inline int of_pci_range_to_resource(struct of_pci_range *range,
117 struct device_node *np,
118 struct resource *res)
119{
120 return -ENOSYS;
121}
122
123static inline bool of_dma_is_coherent(struct device_node *np)
124{
125 return false;
126}
127#endif /* CONFIG_OF_ADDRESS */
128
129#ifdef CONFIG_OF
130extern int of_address_to_resource(struct device_node *dev, int index,
131 struct resource *r);
132void __iomem *of_iomap(struct device_node *node, int index);
133#else
134static inline int of_address_to_resource(struct device_node *dev, int index,
135 struct resource *r)
136{
137 return -EINVAL;
138}
139
140static inline void __iomem *of_iomap(struct device_node *device, int index)
141{
142 return NULL;
143}
144#endif
145#define of_range_parser_init of_pci_range_parser_init
146
147static inline const __be32 *of_get_address(struct device_node *dev, int index,
148 u64 *size, unsigned int *flags)
149{
150 return __of_get_address(dev, index, -1, size, flags);
151}
152
153static inline const __be32 *of_get_pci_address(struct device_node *dev, int bar_no,
154 u64 *size, unsigned int *flags)
155{
156 return __of_get_address(dev, -1, bar_no, size, flags);
157}
158
159static inline int of_address_count(struct device_node *np)
160{
161 struct resource res;
162 int count = 0;
163
164 while (of_address_to_resource(np, count, &res) == 0)
165 count++;
166
167 return count;
168}
169
170#endif /* __OF_ADDRESS_H */