1 #ifndef _GPXE_PCI_IO_H 2 #define _GPXE_PCI_IO_H 3 4 /** @file 5 * 6 * PCI I/O API 7 * 8 */ 9 10 FILE_LICENCE ( GPL2_OR_LATER ); 11 12 #include <stdint.h> 13 #include <gpxe/api.h> 14 #include <config/ioapi.h> 15 16 /** 17 * Calculate static inline PCI I/O API function name 18 * 19 * @v _prefix Subsystem prefix 20 * @v _api_func API function 21 * @ret _subsys_func Subsystem API function 22 */ 23 #define PCIAPI_INLINE( _subsys, _api_func ) \ 24 SINGLE_API_INLINE ( PCIAPI_PREFIX_ ## _subsys, _api_func ) 25 26 /** 27 * Provide a PCI I/O API implementation 28 * 29 * @v _prefix Subsystem prefix 30 * @v _api_func API function 31 * @v _func Implementing function 32 */ 33 #define PROVIDE_PCIAPI( _subsys, _api_func, _func ) \ 34 PROVIDE_SINGLE_API ( PCIAPI_PREFIX_ ## _subsys, _api_func, _func ) 35 36 /** 37 * Provide a static inline PCI I/O API implementation 38 * 39 * @v _prefix Subsystem prefix 40 * @v _api_func API function 41 */ 42 #define PROVIDE_PCIAPI_INLINE( _subsys, _api_func ) \ 43 PROVIDE_SINGLE_API_INLINE ( PCIAPI_PREFIX_ ## _subsys, _api_func ) 44 45 /* Include all architecture-independent I/O API headers */ 46 #include <gpxe/efi/efi_pci.h> 47 48 /* Include all architecture-dependent I/O API headers */ 49 #include <bits/pci_io.h> 50 51 /** 52 * Determine maximum PCI bus number within system 53 * 54 * @ret max_bus Maximum bus number 55 */ 56 int pci_max_bus ( void ); 57 58 /** 59 * Read byte from PCI configuration space 60 * 61 * @v pci PCI device 62 * @v where Location within PCI configuration space 63 * @v value Value read 64 * @ret rc Return status code 65 */ 66 int pci_read_config_byte ( struct pci_device *pci, unsigned int where, 67 uint8_t *value ); 68 69 /** 70 * Read 16-bit word from PCI configuration space 71 * 72 * @v pci PCI device 73 * @v where Location within PCI configuration space 74 * @v value Value read 75 * @ret rc Return status code 76 */ 77 int pci_read_config_word ( struct pci_device *pci, unsigned int where, 78 uint16_t *value ); 79 80 /** 81 * Read 32-bit dword from PCI configuration space 82 * 83 * @v pci PCI device 84 * @v where Location within PCI configuration space 85 * @v value Value read 86 * @ret rc Return status code 87 */ 88 int pci_read_config_dword ( struct pci_device *pci, unsigned int where, 89 uint32_t *value ); 90 91 /** 92 * Write byte to PCI configuration space 93 * 94 * @v pci PCI device 95 * @v where Location within PCI configuration space 96 * @v value Value to be written 97 * @ret rc Return status code 98 */ 99 int pci_write_config_byte ( struct pci_device *pci, unsigned int where, 100 uint8_t value ); 101 102 /** 103 * Write 16-bit word to PCI configuration space 104 * 105 * @v pci PCI device 106 * @v where Location within PCI configuration space 107 * @v value Value to be written 108 * @ret rc Return status code 109 */ 110 int pci_write_config_word ( struct pci_device *pci, unsigned int where, 111 uint16_t value ); 112 113 /** 114 * Write 32-bit dword to PCI configuration space 115 * 116 * @v pci PCI device 117 * @v where Location within PCI configuration space 118 * @v value Value to be written 119 * @ret rc Return status code 120 */ 121 int pci_write_config_dword ( struct pci_device *pci, unsigned int where, 122 uint32_t value ); 123 124 #endif /* _GPXE_PCI_IO_H */ 125
