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/* 39 * of_range_count - Get the number of "ranges" or "dma-ranges" entries 40 * @parser: Parser state initialized by of_range_parser_init() 41 * 42 * Returns the number of entries or 0 if none. 43 * 44 * Note that calling this within or after the for_each_of_range() iterator will 45 * be inaccurate giving the number of entries remaining. 46 */ 47static inline int of_range_count(const struct of_range_parser *parser) 48{ 49 if (!parser || !parser->node || !parser->range || parser->range == parser->end) 50 return 0; 51 return (parser->end - parser->range) / (parser->na + parser->pna + parser->ns); 52} 53 54/* Translate a DMA address from device space to CPU space */ 55extern u64 of_translate_dma_address(struct device_node *dev, 56 const __be32 *in_addr); 57extern const __be32 *of_translate_dma_region(struct device_node *dev, const __be32 *addr, 58 phys_addr_t *start, size_t *length); 59 60#ifdef CONFIG_OF_ADDRESS 61extern u64 of_translate_address(struct device_node *np, const __be32 *addr); 62extern int of_address_to_resource(struct device_node *dev, int index, 63 struct resource *r); 64extern void __iomem *of_iomap(struct device_node *device, int index); 65void __iomem *of_io_request_and_map(struct device_node *device, 66 int index, const char *name); 67 68/* Extract an address from a device, returns the region size and 69 * the address space flags too. The PCI version uses a BAR number 70 * instead of an absolute index 71 */ 72extern const __be32 *__of_get_address(struct device_node *dev, int index, int bar_no, 73 u64 *size, unsigned int *flags); 74 75int of_property_read_reg(struct device_node *np, int idx, u64 *addr, u64 *size); 76 77extern int of_pci_range_parser_init(struct of_pci_range_parser *parser, 78 struct device_node *node); 79extern int of_pci_dma_range_parser_init(struct of_pci_range_parser *parser, 80 struct device_node *node); 81extern struct of_pci_range *of_pci_range_parser_one( 82 struct of_pci_range_parser *parser, 83 struct of_pci_range *range); 84extern int of_pci_address_to_resource(struct device_node *dev, int bar, 85 struct resource *r); 86extern int of_pci_range_to_resource(struct of_pci_range *range, 87 struct device_node *np, 88 struct resource *res); 89extern int of_range_to_resource(struct device_node *np, int index, 90 struct resource *res); 91extern bool of_dma_is_coherent(struct device_node *np); 92#else /* CONFIG_OF_ADDRESS */ 93static inline void __iomem *of_io_request_and_map(struct device_node *device, 94 int index, const char *name) 95{ 96 return IOMEM_ERR_PTR(-EINVAL); 97} 98 99static inline u64 of_translate_address(struct device_node *np, 100 const __be32 *addr) 101{ 102 return OF_BAD_ADDR; 103} 104 105static inline const __be32 *__of_get_address(struct device_node *dev, int index, int bar_no, 106 u64 *size, unsigned int *flags) 107{ 108 return NULL; 109} 110 111static inline int of_property_read_reg(struct device_node *np, int idx, u64 *addr, u64 *size) 112{ 113 return -ENOSYS; 114} 115 116static inline int of_pci_range_parser_init(struct of_pci_range_parser *parser, 117 struct device_node *node) 118{ 119 return -ENOSYS; 120} 121 122static inline int of_pci_dma_range_parser_init(struct of_pci_range_parser *parser, 123 struct device_node *node) 124{ 125 return -ENOSYS; 126} 127 128static inline struct of_pci_range *of_pci_range_parser_one( 129 struct of_pci_range_parser *parser, 130 struct of_pci_range *range) 131{ 132 return NULL; 133} 134 135static inline int of_pci_address_to_resource(struct device_node *dev, int bar, 136 struct resource *r) 137{ 138 return -ENOSYS; 139} 140 141static inline int of_pci_range_to_resource(struct of_pci_range *range, 142 struct device_node *np, 143 struct resource *res) 144{ 145 return -ENOSYS; 146} 147 148static inline int of_range_to_resource(struct device_node *np, int index, 149 struct resource *res) 150{ 151 return -ENOSYS; 152} 153 154static inline bool of_dma_is_coherent(struct device_node *np) 155{ 156 return false; 157} 158#endif /* CONFIG_OF_ADDRESS */ 159 160#ifdef CONFIG_OF 161extern int of_address_to_resource(struct device_node *dev, int index, 162 struct resource *r); 163void __iomem *of_iomap(struct device_node *node, int index); 164#else 165static inline int of_address_to_resource(struct device_node *dev, int index, 166 struct resource *r) 167{ 168 return -EINVAL; 169} 170 171static inline void __iomem *of_iomap(struct device_node *device, int index) 172{ 173 return NULL; 174} 175#endif 176#define of_range_parser_init of_pci_range_parser_init 177 178static inline const __be32 *of_get_address(struct device_node *dev, int index, 179 u64 *size, unsigned int *flags) 180{ 181 return __of_get_address(dev, index, -1, size, flags); 182} 183 184static inline const __be32 *of_get_pci_address(struct device_node *dev, int bar_no, 185 u64 *size, unsigned int *flags) 186{ 187 return __of_get_address(dev, -1, bar_no, size, flags); 188} 189 190static inline int of_address_count(struct device_node *np) 191{ 192 struct resource res; 193 int count = 0; 194 195 while (of_address_to_resource(np, count, &res) == 0) 196 count++; 197 198 return count; 199} 200 201#endif /* __OF_ADDRESS_H */ 202