1 /* 2 * The PCI Library -- Internal Stuff 3 * 4 * Copyright (c) 1997--2022 Martin Mares <[email protected]> 5 * 6 * Can be freely distributed and used under the terms of the GNU GPL v2+ 7 * 8 * SPDX-License-Identifier: GPL-2.0-or-later 9 */ 10 11 #include "config.h" 12 13 #ifdef PCI_SHARED_LIB 14 #define PCI_ABI __attribute__((visibility("default"))) 15 // Functions, which are bound to externally visible symbols by the versioning 16 // mechanism, have to be declared as VERSIONED. Otherwise, GCC with global 17 // optimizations is happy to optimize them away, leading to linker failures. 18 #define VERSIONED_ABI __attribute__((used)) PCI_ABI 19 #ifdef __APPLE__ 20 #define STATIC_ALIAS(_decl, _for) VERSIONED_ABI _decl { return _for; } 21 #define DEFINE_ALIAS(_decl, _for) 22 #define SYMBOL_VERSION(_int, _ext) 23 #else 24 #define STATIC_ALIAS(_decl, _for) 25 #define DEFINE_ALIAS(_decl, _for) extern _decl __attribute__((alias(#_for))) VERSIONED_ABI 26 #ifdef _WIN32 27 /* GCC does not support asm .symver directive for Windows targets, so define new external global function symbol as alias to internal symbol */ 28 #define SYMBOL_VERSION(_int, _ext) asm(".globl\t" PCI_STRINGIFY(__MINGW_USYMBOL(_ext)) "\n\t" \ 29 ".def\t" PCI_STRINGIFY(__MINGW_USYMBOL(_ext)) ";\t.scl\t2;\t.type\t32;\t.endef\n\t" \ 30 ".set\t" PCI_STRINGIFY(__MINGW_USYMBOL(_ext)) "," PCI_STRINGIFY(__MINGW_USYMBOL(_int))) 31 #else 32 #define SYMBOL_VERSION(_int, _ext) asm(".symver " #_int "," #_ext) 33 #endif 34 #endif 35 #else 36 #define VERSIONED_ABI 37 #define STATIC_ALIAS(_decl, _for) _decl { return _for; } 38 #define DEFINE_ALIAS(_decl, _for) 39 #define SYMBOL_VERSION(_int, _ext) 40 #endif 41 42 #include "pci.h" 43 #include "sysdep.h" 44 45 /* Old 32-bit-only versions of MinGW32 do not define __MINGW_USYMBOL macro */ 46 #ifdef __MINGW32__ 47 #ifndef __MINGW_USYMBOL 48 #define __MINGW_USYMBOL(sym) _##sym 49 #endif 50 #endif 51 52 #define _PCI_STRINGIFY(x) #x 53 #define PCI_STRINGIFY(x) _PCI_STRINGIFY(x) 54 55 struct pci_methods { 56 char *name; 57 char *help; 58 void (*config)(struct pci_access *); 59 int (*detect)(struct pci_access *); 60 void (*init)(struct pci_access *); 61 void (*cleanup)(struct pci_access *); 62 void (*scan)(struct pci_access *); 63 void (*fill_info)(struct pci_dev *, unsigned int flags); 64 int (*read)(struct pci_dev *, int pos, byte *buf, int len); 65 int (*write)(struct pci_dev *, int pos, byte *buf, int len); 66 int (*read_vpd)(struct pci_dev *, int pos, byte *buf, int len); 67 void (*init_dev)(struct pci_dev *); 68 void (*cleanup_dev)(struct pci_dev *); 69 }; 70 71 /* generic.c */ 72 void pci_generic_scan_bus(struct pci_access *, byte *busmap, int domain, int bus); 73 void pci_generic_scan_domain(struct pci_access *, int domain); 74 void pci_generic_scan(struct pci_access *); 75 void pci_generic_fill_info(struct pci_dev *, unsigned int flags); 76 int pci_generic_block_read(struct pci_dev *, int pos, byte *buf, int len); 77 int pci_generic_block_write(struct pci_dev *, int pos, byte *buf, int len); 78 79 /* emulated.c */ 80 int pci_emulated_read(struct pci_dev *d, int pos, byte *buf, int len); 81 82 /* init.c */ 83 void *pci_malloc(struct pci_access *, int); 84 void pci_mfree(void *); 85 char *pci_strdup(struct pci_access *a, const char *s); 86 struct pci_access *pci_clone_access(struct pci_access *a); 87 int pci_init_internal(struct pci_access *a, int skip_method); 88 89 void pci_init_v30(struct pci_access *a) VERSIONED_ABI; 90 void pci_init_v35(struct pci_access *a) VERSIONED_ABI; 91 92 /* access.c */ 93 struct pci_dev *pci_alloc_dev(struct pci_access *); 94 int pci_link_dev(struct pci_access *, struct pci_dev *); 95 96 int pci_fill_info_v30(struct pci_dev *, int flags) VERSIONED_ABI; 97 int pci_fill_info_v31(struct pci_dev *, int flags) VERSIONED_ABI; 98 int pci_fill_info_v32(struct pci_dev *, int flags) VERSIONED_ABI; 99 int pci_fill_info_v33(struct pci_dev *, int flags) VERSIONED_ABI; 100 int pci_fill_info_v34(struct pci_dev *, int flags) VERSIONED_ABI; 101 int pci_fill_info_v35(struct pci_dev *, int flags) VERSIONED_ABI; 102 int pci_fill_info_v38(struct pci_dev *, int flags) VERSIONED_ABI; 103 104 static inline int want_fill(struct pci_dev *d, unsigned want_fields, unsigned int try_fields) 105 { 106 want_fields &= try_fields; 107 if ((d->known_fields & want_fields) == want_fields) 108 return 0; 109 else 110 { 111 d->known_fields |= try_fields; 112 return 1; 113 } 114 } 115 116 static inline void clear_fill(struct pci_dev *d, unsigned clear_fields) 117 { 118 d->known_fields &= ~clear_fields; 119 } 120 121 struct pci_property { 122 struct pci_property *next; 123 u32 key; 124 char value[1]; 125 }; 126 127 char *pci_set_property(struct pci_dev *d, u32 key, char *value); 128 129 /* params.c */ 130 struct pci_param *pci_define_param(struct pci_access *acc, char *param, char *val, char *help); 131 int pci_set_param_internal(struct pci_access *acc, char *param, char *val, int copy); 132 void pci_free_params(struct pci_access *acc); 133 134 /* caps.c */ 135 void pci_scan_caps(struct pci_dev *, unsigned int want_fields); 136 void pci_free_caps(struct pci_dev *); 137 138 extern struct pci_methods pm_intel_conf1, pm_intel_conf2, pm_linux_proc, 139 pm_fbsd_device, pm_aix_device, pm_nbsd_libpci, pm_obsd_device, 140 pm_dump, pm_linux_sysfs, pm_darwin, pm_sylixos_device, pm_hurd, 141 pm_mmio_conf1, pm_mmio_conf1_ext, pm_ecam, 142 pm_win32_cfgmgr32, pm_win32_kldbg, pm_win32_sysdbg; 143