1 /* 2 * The PCI Library -- Initialization and related things 3 * 4 * Copyright (c) 1997--2018 Martin Mares <[email protected]> 5 * 6 * Can be freely distributed and used under the terms of the GNU GPL. 7 */ 8 9 #include <stdio.h> 10 #include <stdlib.h> 11 #include <stdarg.h> 12 #include <string.h> 13 14 #include "internal.h" 15 16 #ifdef PCI_OS_WINDOWS 17 #include <windows.h> 18 #endif 19 20 static struct pci_methods *pci_methods[PCI_ACCESS_MAX] = { 21 NULL, 22 #ifdef PCI_HAVE_PM_LINUX_SYSFS 23 &pm_linux_sysfs, 24 #else 25 NULL, 26 #endif 27 #ifdef PCI_HAVE_PM_LINUX_PROC 28 &pm_linux_proc, 29 #else 30 NULL, 31 #endif 32 #ifdef PCI_HAVE_PM_INTEL_CONF 33 &pm_intel_conf1, 34 &pm_intel_conf2, 35 #else 36 NULL, 37 NULL, 38 #endif 39 #ifdef PCI_HAVE_PM_FBSD_DEVICE 40 &pm_fbsd_device, 41 #else 42 NULL, 43 #endif 44 #ifdef PCI_HAVE_PM_AIX_DEVICE 45 &pm_aix_device, 46 #else 47 NULL, 48 #endif 49 #ifdef PCI_HAVE_PM_NBSD_LIBPCI 50 &pm_nbsd_libpci, 51 #else 52 NULL, 53 #endif 54 #ifdef PCI_HAVE_PM_OBSD_DEVICE 55 &pm_obsd_device, 56 #else 57 NULL, 58 #endif 59 #ifdef PCI_HAVE_PM_DUMP 60 &pm_dump, 61 #else 62 NULL, 63 #endif 64 #ifdef PCI_HAVE_PM_DARWIN_DEVICE 65 &pm_darwin, 66 #else 67 NULL, 68 #endif 69 #ifdef PCI_HAVE_PM_SYLIXOS_DEVICE 70 &pm_sylixos_device, 71 #else 72 NULL, 73 #endif 74 #ifdef PCI_HAVE_PM_HURD_CONF 75 &pm_hurd, 76 #else 77 NULL, 78 #endif 79 #ifdef PCI_HAVE_PM_WIN32_CFGMGR32 80 &pm_win32_cfgmgr32, 81 #else 82 NULL, 83 #endif 84 #ifdef PCI_HAVE_PM_WIN32_SYSDBG 85 &pm_win32_sysdbg, 86 #else 87 NULL, 88 #endif 89 }; 90 91 // If PCI_ACCESS_AUTO is selected, we probe the access methods in this order 92 static int probe_sequence[] = { 93 // System-specific methods 94 PCI_ACCESS_SYS_BUS_PCI, 95 PCI_ACCESS_PROC_BUS_PCI, 96 PCI_ACCESS_FBSD_DEVICE, 97 PCI_ACCESS_AIX_DEVICE, 98 PCI_ACCESS_NBSD_LIBPCI, 99 PCI_ACCESS_OBSD_DEVICE, 100 PCI_ACCESS_DARWIN, 101 PCI_ACCESS_SYLIXOS_DEVICE, 102 PCI_ACCESS_HURD, 103 PCI_ACCESS_WIN32_CFGMGR32, 104 PCI_ACCESS_WIN32_SYSDBG, 105 // Low-level methods poking the hardware directly 106 PCI_ACCESS_I386_TYPE1, 107 PCI_ACCESS_I386_TYPE2, 108 -1, 109 }; 110 111 static void PCI_NONRET 112 pci_generic_error(char *msg, ...) 113 { 114 va_list args; 115 116 va_start(args, msg); 117 fputs("pcilib: ", stderr); 118 vfprintf(stderr, msg, args); 119 va_end(args); 120 fputc('\n', stderr); 121 exit(1); 122 } 123 124 static void 125 pci_generic_warn(char *msg, ...) 126 { 127 va_list args; 128 129 va_start(args, msg); 130 fputs("pcilib: ", stderr); 131 vfprintf(stderr, msg, args); 132 va_end(args); 133 fputc('\n', stderr); 134 } 135 136 static void 137 pci_generic_debug(char *msg, ...) 138 { 139 va_list args; 140 141 va_start(args, msg); 142 vfprintf(stdout, msg, args); 143 va_end(args); 144 } 145 146 static void 147 pci_null_debug(char *msg UNUSED, ...) 148 { 149 } 150 151 // Memory allocation functions are safe to call if pci_access is not fully initalized or even NULL 152 153 void * 154 pci_malloc(struct pci_access *a, int size) 155 { 156 void *x = malloc(size); 157 158 if (!x) 159 (a && a->error ? a->error : pci_generic_error)("Out of memory (allocation of %d bytes failed)", size); 160 return x; 161 } 162 163 void 164 pci_mfree(void *x) 165 { 166 if (x) 167 free(x); 168 } 169 170 char * 171 pci_strdup(struct pci_access *a, const char *s) 172 { 173 int len = strlen(s) + 1; 174 char *t = pci_malloc(a, len); 175 memcpy(t, s, len); 176 return t; 177 } 178 179 int 180 pci_lookup_method(char *name) 181 { 182 int i; 183 184 for (i=0; i<PCI_ACCESS_MAX; i++) 185 if (pci_methods[i] && !strcmp(pci_methods[i]->name, name)) 186 return i; 187 return -1; 188 } 189 190 char * 191 pci_get_method_name(int index) 192 { 193 if (index < 0 || index >= PCI_ACCESS_MAX) 194 return NULL; 195 else if (!pci_methods[index]) 196 return ""; 197 else 198 return pci_methods[index]->name; 199 } 200 201 #ifdef PCI_OS_WINDOWS 202 203 static void 204 pci_init_name_list_path(struct pci_access *a) 205 { 206 if ((PCI_PATH_IDS_DIR)[0]) 207 pci_set_name_list_path(a, PCI_PATH_IDS_DIR "\\" PCI_IDS, 0); 208 else 209 { 210 char *path, *sep; 211 DWORD len; 212 213 path = pci_malloc(a, MAX_PATH+1); 214 len = GetModuleFileNameA(NULL, path, MAX_PATH+1); 215 sep = (len > 0) ? strrchr(path, '\\') : NULL; 216 if (len == 0 || len == MAX_PATH+1 || !sep || MAX_PATH-(size_t)(sep+1-path) < sizeof(PCI_IDS)) 217 { 218 free(path); 219 pci_set_name_list_path(a, PCI_IDS, 0); 220 } 221 else 222 { 223 memcpy(sep+1, PCI_IDS, sizeof(PCI_IDS)); 224 pci_set_name_list_path(a, path, 1); 225 } 226 } 227 } 228 229 #else 230 231 static void 232 pci_init_name_list_path(struct pci_access *a) 233 { 234 pci_set_name_list_path(a, PCI_PATH_IDS_DIR "/" PCI_IDS, 0); 235 } 236 237 #endif 238 239 struct pci_access * 240 pci_alloc(void) 241 { 242 struct pci_access *a = pci_malloc(NULL, sizeof(struct pci_access)); 243 int i; 244 245 memset(a, 0, sizeof(*a)); 246 pci_init_name_list_path(a); 247 #ifdef PCI_USE_DNS 248 pci_define_param(a, "net.domain", PCI_ID_DOMAIN, "DNS domain used for resolving of ID's"); 249 pci_define_param(a, "net.cache_name", "~/.pciids-cache", "Name of the ID cache file"); 250 a->id_lookup_mode = PCI_LOOKUP_CACHE; 251 #endif 252 #ifdef PCI_HAVE_HWDB 253 pci_define_param(a, "hwdb.disable", "0", "Do not look up names in UDEV's HWDB if non-zero"); 254 #endif 255 for (i=0; i<PCI_ACCESS_MAX; i++) 256 if (pci_methods[i] && pci_methods[i]->config) 257 pci_methods[i]->config(a); 258 return a; 259 } 260 261 void 262 pci_init_v35(struct pci_access *a) 263 { 264 if (!a->error) 265 a->error = pci_generic_error; 266 if (!a->warning) 267 a->warning = pci_generic_warn; 268 if (!a->debug) 269 a->debug = pci_generic_debug; 270 if (!a->debugging) 271 a->debug = pci_null_debug; 272 273 if (a->method) 274 { 275 if (a->method >= PCI_ACCESS_MAX || !pci_methods[a->method]) 276 a->error("This access method is not supported."); 277 a->methods = pci_methods[a->method]; 278 } 279 else 280 { 281 unsigned int i; 282 for (i=0; probe_sequence[i] >= 0; i++) 283 { 284 struct pci_methods *m = pci_methods[probe_sequence[i]]; 285 if (!m) 286 continue; 287 a->debug("Trying method %s...", m->name); 288 if (m->detect(a)) 289 { 290 a->debug("...OK\n"); 291 a->methods = m; 292 a->method = probe_sequence[i]; 293 break; 294 } 295 a->debug("...No.\n"); 296 } 297 if (!a->methods) 298 a->error("Cannot find any working access method."); 299 } 300 a->debug("Decided to use %s\n", a->methods->name); 301 a->methods->init(a); 302 } 303 304 STATIC_ALIAS(void pci_init(struct pci_access *a), pci_init_v35(a)); 305 DEFINE_ALIAS(void pci_init_v30(struct pci_access *a), pci_init_v35); 306 SYMBOL_VERSION(pci_init_v30, pci_init@LIBPCI_3.0); 307 SYMBOL_VERSION(pci_init_v35, pci_init@@LIBPCI_3.5); 308 309 void 310 pci_cleanup(struct pci_access *a) 311 { 312 struct pci_dev *d, *e; 313 314 for (d=a->devices; d; d=e) 315 { 316 e = d->next; 317 pci_free_dev(d); 318 } 319 if (a->methods) 320 a->methods->cleanup(a); 321 pci_free_name_list(a); 322 pci_free_params(a); 323 pci_set_name_list_path(a, NULL, 0); 324 pci_mfree(a); 325 } 326