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_KLDBG 85 &pm_win32_kldbg, 86 #else 87 NULL, 88 #endif 89 #ifdef PCI_HAVE_PM_WIN32_SYSDBG 90 &pm_win32_sysdbg, 91 #else 92 NULL, 93 #endif 94 #ifdef PCI_HAVE_PM_MMIO_CONF 95 &pm_mmio_conf1, 96 #else 97 NULL, 98 #endif 99 }; 100 101 // If PCI_ACCESS_AUTO is selected, we probe the access methods in this order 102 static int probe_sequence[] = { 103 // System-specific methods 104 PCI_ACCESS_SYS_BUS_PCI, 105 PCI_ACCESS_PROC_BUS_PCI, 106 PCI_ACCESS_FBSD_DEVICE, 107 PCI_ACCESS_AIX_DEVICE, 108 PCI_ACCESS_NBSD_LIBPCI, 109 PCI_ACCESS_OBSD_DEVICE, 110 PCI_ACCESS_DARWIN, 111 PCI_ACCESS_SYLIXOS_DEVICE, 112 PCI_ACCESS_HURD, 113 PCI_ACCESS_WIN32_CFGMGR32, 114 PCI_ACCESS_WIN32_KLDBG, 115 PCI_ACCESS_WIN32_SYSDBG, 116 // Low-level methods poking the hardware directly 117 PCI_ACCESS_I386_TYPE1, 118 PCI_ACCESS_I386_TYPE2, 119 PCI_ACCESS_MMIO_TYPE1, 120 -1, 121 }; 122 123 static void PCI_NONRET 124 pci_generic_error(char *msg, ...) 125 { 126 va_list args; 127 128 va_start(args, msg); 129 fputs("pcilib: ", stderr); 130 vfprintf(stderr, msg, args); 131 va_end(args); 132 fputc('\n', stderr); 133 exit(1); 134 } 135 136 static void 137 pci_generic_warn(char *msg, ...) 138 { 139 va_list args; 140 141 va_start(args, msg); 142 fputs("pcilib: ", stderr); 143 vfprintf(stderr, msg, args); 144 va_end(args); 145 fputc('\n', stderr); 146 } 147 148 static void 149 pci_generic_debug(char *msg, ...) 150 { 151 va_list args; 152 153 va_start(args, msg); 154 vfprintf(stdout, msg, args); 155 va_end(args); 156 } 157 158 static void 159 pci_null_debug(char *msg UNUSED, ...) 160 { 161 } 162 163 // Memory allocation functions are safe to call if pci_access is not fully initalized or even NULL 164 165 void * 166 pci_malloc(struct pci_access *a, int size) 167 { 168 void *x = malloc(size); 169 170 if (!x) 171 (a && a->error ? a->error : pci_generic_error)("Out of memory (allocation of %d bytes failed)", size); 172 return x; 173 } 174 175 void 176 pci_mfree(void *x) 177 { 178 if (x) 179 free(x); 180 } 181 182 char * 183 pci_strdup(struct pci_access *a, const char *s) 184 { 185 int len = strlen(s) + 1; 186 char *t = pci_malloc(a, len); 187 memcpy(t, s, len); 188 return t; 189 } 190 191 int 192 pci_lookup_method(char *name) 193 { 194 int i; 195 196 for (i=0; i<PCI_ACCESS_MAX; i++) 197 if (pci_methods[i] && !strcmp(pci_methods[i]->name, name)) 198 return i; 199 return -1; 200 } 201 202 char * 203 pci_get_method_name(int index) 204 { 205 if (index < 0 || index >= PCI_ACCESS_MAX) 206 return NULL; 207 else if (!pci_methods[index]) 208 return ""; 209 else 210 return pci_methods[index]->name; 211 } 212 213 #ifdef PCI_OS_WINDOWS 214 215 static void 216 pci_init_name_list_path(struct pci_access *a) 217 { 218 if ((PCI_PATH_IDS_DIR)[0]) 219 pci_set_name_list_path(a, PCI_PATH_IDS_DIR "\\" PCI_IDS, 0); 220 else 221 { 222 char *path, *sep; 223 DWORD len; 224 225 path = pci_malloc(a, MAX_PATH+1); 226 len = GetModuleFileNameA(NULL, path, MAX_PATH+1); 227 sep = (len > 0) ? strrchr(path, '\\') : NULL; 228 if (len == 0 || len == MAX_PATH+1 || !sep || MAX_PATH-(size_t)(sep+1-path) < sizeof(PCI_IDS)) 229 { 230 free(path); 231 pci_set_name_list_path(a, PCI_IDS, 0); 232 } 233 else 234 { 235 memcpy(sep+1, PCI_IDS, sizeof(PCI_IDS)); 236 pci_set_name_list_path(a, path, 1); 237 } 238 } 239 } 240 241 #else 242 243 static void 244 pci_init_name_list_path(struct pci_access *a) 245 { 246 pci_set_name_list_path(a, PCI_PATH_IDS_DIR "/" PCI_IDS, 0); 247 } 248 249 #endif 250 251 struct pci_access * 252 pci_alloc(void) 253 { 254 struct pci_access *a = pci_malloc(NULL, sizeof(struct pci_access)); 255 int i; 256 257 memset(a, 0, sizeof(*a)); 258 pci_init_name_list_path(a); 259 #ifdef PCI_USE_DNS 260 pci_define_param(a, "net.domain", PCI_ID_DOMAIN, "DNS domain used for resolving of ID's"); 261 pci_define_param(a, "net.cache_name", "~/.pciids-cache", "Name of the ID cache file"); 262 a->id_lookup_mode = PCI_LOOKUP_CACHE; 263 #endif 264 #ifdef PCI_HAVE_HWDB 265 pci_define_param(a, "hwdb.disable", "0", "Do not look up names in UDEV's HWDB if non-zero"); 266 #endif 267 for (i=0; i<PCI_ACCESS_MAX; i++) 268 if (pci_methods[i] && pci_methods[i]->config) 269 pci_methods[i]->config(a); 270 return a; 271 } 272 273 void 274 pci_init_v35(struct pci_access *a) 275 { 276 if (!a->error) 277 a->error = pci_generic_error; 278 if (!a->warning) 279 a->warning = pci_generic_warn; 280 if (!a->debug) 281 a->debug = pci_generic_debug; 282 if (!a->debugging) 283 a->debug = pci_null_debug; 284 285 if (a->method) 286 { 287 if (a->method >= PCI_ACCESS_MAX || !pci_methods[a->method]) 288 a->error("This access method is not supported."); 289 a->methods = pci_methods[a->method]; 290 } 291 else 292 { 293 unsigned int i; 294 for (i=0; probe_sequence[i] >= 0; i++) 295 { 296 struct pci_methods *m = pci_methods[probe_sequence[i]]; 297 if (!m) 298 continue; 299 a->debug("Trying method %s...", m->name); 300 if (m->detect(a)) 301 { 302 a->debug("...OK\n"); 303 a->methods = m; 304 a->method = probe_sequence[i]; 305 break; 306 } 307 a->debug("...No.\n"); 308 } 309 if (!a->methods) 310 a->error("Cannot find any working access method."); 311 } 312 a->debug("Decided to use %s\n", a->methods->name); 313 a->methods->init(a); 314 } 315 316 STATIC_ALIAS(void pci_init(struct pci_access *a), pci_init_v35(a)); 317 DEFINE_ALIAS(void pci_init_v30(struct pci_access *a), pci_init_v35); 318 SYMBOL_VERSION(pci_init_v30, pci_init@LIBPCI_3.0); 319 SYMBOL_VERSION(pci_init_v35, pci_init@@LIBPCI_3.5); 320 321 void 322 pci_cleanup(struct pci_access *a) 323 { 324 struct pci_dev *d, *e; 325 326 for (d=a->devices; d; d=e) 327 { 328 e = d->next; 329 pci_free_dev(d); 330 } 331 if (a->methods) 332 a->methods->cleanup(a); 333 pci_free_name_list(a); 334 pci_free_params(a); 335 pci_set_name_list_path(a, NULL, 0); 336 pci_mfree(a); 337 } 338