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_bus;
  10
  11 struct 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
  23 struct 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 */
  39 extern u64 of_translate_dma_address(struct device_node *dev,
  40                                     const __be32 *in_addr);
  41
  42 #ifdef CONFIG_OF_ADDRESS
  43 extern u64 of_translate_address(struct device_node *np, const __be32 *addr);
  44 extern int of_address_to_resource(struct device_node *dev, int index,
  45                                   struct resource *r);
  46 extern void __iomem *of_iomap(struct device_node *device, int index);
  47 void __iomem *of_io_request_and_map(struct device_node *device,
  48                                     int index, const char *name);
  49
  50 /* Extract an address from a device, returns the region size and
  51  * the address space flags too. The PCI version uses a BAR number
  52  * instead of an absolute index
  53  */
  54 extern const __be32 *of_get_address(struct device_node *dev, int index,
  55                            u64 *size, unsigned int *flags);
  56
  57 extern int of_pci_range_parser_init(struct of_pci_range_parser *parser,
  58                         struct device_node *node);
  59 extern int of_pci_dma_range_parser_init(struct of_pci_range_parser *parser,
  60                         struct device_node *node);
  61 extern struct of_pci_range *of_pci_range_parser_one(
  62                                         struct of_pci_range_parser *parser,
  63                                         struct of_pci_range *range);
  64 extern bool of_dma_is_coherent(struct device_node *np);
  65 #else /* CONFIG_OF_ADDRESS */
  66 static inline void __iomem *of_io_request_and_map(struct device_node *device,
  67                                                   int index, const char *name)
  68 {
  69         return IOMEM_ERR_PTR(-EINVAL);
  70 }
  71
  72 static inline u64 of_translate_address(struct device_node *np,
  73                                        const __be32 *addr)
  74 {
  75         return OF_BAD_ADDR;
  76 }
  77
  78 static inline const __be32 *of_get_address(struct device_node *dev, int index,
  79                                         u64 *size, unsigned int *flags)
  80 {
  81         return NULL;
  82 }
  83
  84 static inline int of_pci_range_parser_init(struct of_pci_range_parser *parser,
  85                         struct device_node *node)
  86 {
  87         return -ENOSYS;
  88 }
  89
  90 static inline int of_pci_dma_range_parser_init(struct of_pci_range_parser *parser,
  91                         struct device_node *node)
  92 {
  93         return -ENOSYS;
  94 }
  95
  96 static inline struct of_pci_range *of_pci_range_parser_one(
  97                                         struct of_pci_range_parser *parser,
  98                                         struct of_pci_range *range)
  99 {
 100         return NULL;
 101 }
 102
 103 static inline bool of_dma_is_coherent(struct device_node *np)
 104 {
 105         return false;
 106 }
 107 #endif /* CONFIG_OF_ADDRESS */
 108
 109 #ifdef CONFIG_OF
 110 extern int of_address_to_resource(struct device_node *dev, int index,
 111                                   struct resource *r);
 112 void __iomem *of_iomap(struct device_node *node, int index);
 113 #else
 114 static inline int of_address_to_resource(struct device_node *dev, int index,
 115                                          struct resource *r)
 116 {
 117         return -EINVAL;
 118 }
 119
 120 static inline void __iomem *of_iomap(struct device_node *device, int index)
 121 {
 122         return NULL;
 123 }
 124 #endif
 125 #define of_range_parser_init of_pci_range_parser_init
 126
 127 #if defined(CONFIG_OF_ADDRESS) && defined(CONFIG_PCI)
 128 extern const __be32 *of_get_pci_address(struct device_node *dev, int bar_no,
 129                                u64 *size, unsigned int *flags);
 130 extern int of_pci_address_to_resource(struct device_node *dev, int bar,
 131                                       struct resource *r);
 132 extern int of_pci_range_to_resource(struct of_pci_range *range,
 133                                     struct device_node *np,
 134                                     struct resource *res);
 135 #else /* CONFIG_OF_ADDRESS && CONFIG_PCI */
 136 static inline int of_pci_address_to_resource(struct device_node *dev, int bar,
 137                                              struct resource *r)
 138 {
 139         return -ENOSYS;
 140 }
 141
 142 static inline const __be32 *of_get_pci_address(struct device_node *dev,
 143                 int bar_no, u64 *size, unsigned int *flags)
 144 {
 145         return NULL;
 146 }
 147 static inline int of_pci_range_to_resource(struct of_pci_range *range,
 148                                            struct device_node *np,
 149                                            struct resource *res)
 150 {
 151         return -ENOSYS;
 152 }
 153 #endif /* CONFIG_OF_ADDRESS && CONFIG_PCI */
 154
 155 #endif /* __OF_ADDRESS_H */