include/linux/of_address.h

   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
   9 struct of_pci_range_parser {
  10         struct device_node *node;
  11         const __be32 *range;
  12         const __be32 *end;
  13         int np;
  14         int pna;
  15 };
  16
  17 struct of_pci_range {
  18         u32 pci_space;
  19         u64 pci_addr;
  20         u64 cpu_addr;
  21         u64 size;
  22         u32 flags;
  23 };
  24
  25 #define for_each_of_pci_range(parser, range) \
  26         for (; of_pci_range_parser_one(parser, range);)
  27
  28 /* Translate a DMA address from device space to CPU space */
  29 extern u64 of_translate_dma_address(struct device_node *dev,
  30                                     const __be32 *in_addr);
  31
  32 #ifdef CONFIG_OF_ADDRESS
  33 extern u64 of_translate_address(struct device_node *np, const __be32 *addr);
  34 extern int of_address_to_resource(struct device_node *dev, int index,
  35                                   struct resource *r);
  36 extern struct device_node *of_find_matching_node_by_address(
  37                                         struct device_node *from,
  38                                         const struct of_device_id *matches,
  39                                         u64 base_address);
  40 extern void __iomem *of_iomap(struct device_node *device, int index);
  41 void __iomem *of_io_request_and_map(struct device_node *device,
  42                                     int index, const char *name);
  43
  44 /* Extract an address from a device, returns the region size and
  45  * the address space flags too. The PCI version uses a BAR number
  46  * instead of an absolute index
  47  */
  48 extern const __be32 *of_get_address(struct device_node *dev, int index,
  49                            u64 *size, unsigned int *flags);
  50
  51 extern int of_pci_range_parser_init(struct of_pci_range_parser *parser,
  52                         struct device_node *node);
  53 extern int of_pci_dma_range_parser_init(struct of_pci_range_parser *parser,
  54                         struct device_node *node);
  55 extern struct of_pci_range *of_pci_range_parser_one(
  56                                         struct of_pci_range_parser *parser,
  57                                         struct of_pci_range *range);
  58 extern int of_dma_get_range(struct device_node *np, u64 *dma_addr,
  59                                 u64 *paddr, u64 *size);
  60 extern bool of_dma_is_coherent(struct device_node *np);
  61 #else /* CONFIG_OF_ADDRESS */
  62 static inline void __iomem *of_io_request_and_map(struct device_node *device,
  63                                                   int index, const char *name)
  64 {
  65         return IOMEM_ERR_PTR(-EINVAL);
  66 }
  67
  68 static inline u64 of_translate_address(struct device_node *np,
  69                                        const __be32 *addr)
  70 {
  71         return OF_BAD_ADDR;
  72 }
  73
  74 static inline struct device_node *of_find_matching_node_by_address(
  75                                         struct device_node *from,
  76                                         const struct of_device_id *matches,
  77                                         u64 base_address)
  78 {
  79         return NULL;
  80 }
  81
  82 static inline const __be32 *of_get_address(struct device_node *dev, int index,
  83                                         u64 *size, unsigned int *flags)
  84 {
  85         return NULL;
  86 }
  87
  88 static inline int of_pci_range_parser_init(struct of_pci_range_parser *parser,
  89                         struct device_node *node)
  90 {
  91         return -ENOSYS;
  92 }
  93
  94 static inline int of_pci_dma_range_parser_init(struct of_pci_range_parser *parser,
  95                         struct device_node *node)
  96 {
  97         return -ENOSYS;
  98 }
  99
 100 static inline struct of_pci_range *of_pci_range_parser_one(
 101                                         struct of_pci_range_parser *parser,
 102                                         struct of_pci_range *range)
 103 {
 104         return NULL;
 105 }
 106
 107 static inline int of_dma_get_range(struct device_node *np, u64 *dma_addr,
 108                                 u64 *paddr, u64 *size)
 109 {
 110         return -ENODEV;
 111 }
 112
 113 static inline bool of_dma_is_coherent(struct device_node *np)
 114 {
 115         return false;
 116 }
 117 #endif /* CONFIG_OF_ADDRESS */
 118
 119 #ifdef CONFIG_OF
 120 extern int of_address_to_resource(struct device_node *dev, int index,
 121                                   struct resource *r);
 122 void __iomem *of_iomap(struct device_node *node, int index);
 123 #else
 124 static inline int of_address_to_resource(struct device_node *dev, int index,
 125                                          struct resource *r)
 126 {
 127         return -EINVAL;
 128 }
 129
 130 static inline void __iomem *of_iomap(struct device_node *device, int index)
 131 {
 132         return NULL;
 133 }
 134 #endif
 135
 136 #if defined(CONFIG_OF_ADDRESS) && defined(CONFIG_PCI)
 137 extern const __be32 *of_get_pci_address(struct device_node *dev, int bar_no,
 138                                u64 *size, unsigned int *flags);
 139 extern int of_pci_address_to_resource(struct device_node *dev, int bar,
 140                                       struct resource *r);
 141 extern int of_pci_range_to_resource(struct of_pci_range *range,
 142                                     struct device_node *np,
 143                                     struct resource *res);
 144 #else /* CONFIG_OF_ADDRESS && CONFIG_PCI */
 145 static inline int of_pci_address_to_resource(struct device_node *dev, int bar,
 146                                              struct resource *r)
 147 {
 148         return -ENOSYS;
 149 }
 150
 151 static inline const __be32 *of_get_pci_address(struct device_node *dev,
 152                 int bar_no, u64 *size, unsigned int *flags)
 153 {
 154         return NULL;
 155 }
 156 static inline int of_pci_range_to_resource(struct of_pci_range *range,
 157                                            struct device_node *np,
 158                                            struct resource *res)
 159 {
 160         return -ENOSYS;
 161 }
 162 #endif /* CONFIG_OF_ADDRESS && CONFIG_PCI */
 163
 164 #endif /* __OF_ADDRESS_H */
 165