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 }; 80 81 // If PCI_ACCESS_AUTO is selected, we probe the access methods in this order 82 static int probe_sequence[] = { 83 // System-specific methods 84 PCI_ACCESS_SYS_BUS_PCI, 85 PCI_ACCESS_PROC_BUS_PCI, 86 PCI_ACCESS_FBSD_DEVICE, 87 PCI_ACCESS_AIX_DEVICE, 88 PCI_ACCESS_NBSD_LIBPCI, 89 PCI_ACCESS_OBSD_DEVICE, 90 PCI_ACCESS_DARWIN, 91 PCI_ACCESS_SYLIXOS_DEVICE, 92 PCI_ACCESS_HURD, 93 // Low-level methods poking the hardware directly 94 PCI_ACCESS_I386_TYPE1, 95 PCI_ACCESS_I386_TYPE2, 96 -1, 97 }; 98 99 static void 100 pci_generic_error(char *msg, ...) 101 { 102 va_list args; 103 104 va_start(args, msg); 105 fputs("pcilib: ", stderr); 106 vfprintf(stderr, msg, args); 107 va_end(args); 108 fputc('\n', stderr); 109 exit(1); 110 } 111 112 static void 113 pci_generic_warn(char *msg, ...) 114 { 115 va_list args; 116 117 va_start(args, msg); 118 fputs("pcilib: ", stderr); 119 vfprintf(stderr, msg, args); 120 va_end(args); 121 fputc('\n', stderr); 122 } 123 124 static void 125 pci_generic_debug(char *msg, ...) 126 { 127 va_list args; 128 129 va_start(args, msg); 130 vfprintf(stdout, msg, args); 131 va_end(args); 132 } 133 134 static void 135 pci_null_debug(char *msg UNUSED, ...) 136 { 137 } 138 139 // Memory allocation functions are safe to call if pci_access is not fully initalized or even NULL 140 141 void * 142 pci_malloc(struct pci_access *a, int size) 143 { 144 void *x = malloc(size); 145 146 if (!x) 147 (a && a->error ? a->error : pci_generic_error)("Out of memory (allocation of %d bytes failed)", size); 148 return x; 149 } 150 151 void 152 pci_mfree(void *x) 153 { 154 if (x) 155 free(x); 156 } 157 158 char * 159 pci_strdup(struct pci_access *a, const char *s) 160 { 161 int len = strlen(s) + 1; 162 char *t = pci_malloc(a, len); 163 memcpy(t, s, len); 164 return t; 165 } 166 167 int 168 pci_lookup_method(char *name) 169 { 170 int i; 171 172 for (i=0; i<PCI_ACCESS_MAX; i++) 173 if (pci_methods[i] && !strcmp(pci_methods[i]->name, name)) 174 return i; 175 return -1; 176 } 177 178 char * 179 pci_get_method_name(int index) 180 { 181 if (index < 0 || index >= PCI_ACCESS_MAX) 182 return NULL; 183 else if (!pci_methods[index]) 184 return ""; 185 else 186 return pci_methods[index]->name; 187 } 188 189 #ifdef PCI_OS_WINDOWS 190 191 static void 192 pci_init_name_list_path(struct pci_access *a) 193 { 194 if ((PCI_PATH_IDS_DIR)[0]) 195 pci_set_name_list_path(a, PCI_PATH_IDS_DIR "\\" PCI_IDS, 0); 196 else 197 { 198 char *path, *sep; 199 DWORD len; 200 201 path = pci_malloc(a, MAX_PATH+1); 202 len = GetModuleFileNameA(NULL, path, MAX_PATH+1); 203 sep = (len > 0) ? strrchr(path, '\\') : NULL; 204 if (len == 0 || len == MAX_PATH+1 || !sep || MAX_PATH-(size_t)(sep+1-path) < sizeof(PCI_IDS)) 205 free(path); 206 else 207 { 208 memcpy(sep+1, PCI_IDS, sizeof(PCI_IDS)); 209 pci_set_name_list_path(a, path, 1); 210 } 211 } 212 } 213 214 #else 215 216 static void 217 pci_init_name_list_path(struct pci_access *a) 218 { 219 pci_set_name_list_path(a, PCI_PATH_IDS_DIR "/" PCI_IDS, 0); 220 } 221 222 #endif 223 224 struct pci_access * 225 pci_alloc(void) 226 { 227 struct pci_access *a = pci_malloc(NULL, sizeof(struct pci_access)); 228 int i; 229 230 memset(a, 0, sizeof(*a)); 231 pci_init_name_list_path(a); 232 #ifdef PCI_USE_DNS 233 pci_define_param(a, "net.domain", PCI_ID_DOMAIN, "DNS domain used for resolving of ID's"); 234 pci_define_param(a, "net.cache_name", "~/.pciids-cache", "Name of the ID cache file"); 235 a->id_lookup_mode = PCI_LOOKUP_CACHE; 236 #endif 237 #ifdef PCI_HAVE_HWDB 238 pci_define_param(a, "hwdb.disable", "0", "Do not look up names in UDEV's HWDB if non-zero"); 239 #endif 240 for (i=0; i<PCI_ACCESS_MAX; i++) 241 if (pci_methods[i] && pci_methods[i]->config) 242 pci_methods[i]->config(a); 243 return a; 244 } 245 246 void 247 pci_init_v35(struct pci_access *a) 248 { 249 if (!a->error) 250 a->error = pci_generic_error; 251 if (!a->warning) 252 a->warning = pci_generic_warn; 253 if (!a->debug) 254 a->debug = pci_generic_debug; 255 if (!a->debugging) 256 a->debug = pci_null_debug; 257 258 if (a->method) 259 { 260 if (a->method >= PCI_ACCESS_MAX || !pci_methods[a->method]) 261 a->error("This access method is not supported."); 262 a->methods = pci_methods[a->method]; 263 } 264 else 265 { 266 unsigned int i; 267 for (i=0; probe_sequence[i] >= 0; i++) 268 { 269 struct pci_methods *m = pci_methods[probe_sequence[i]]; 270 if (!m) 271 continue; 272 a->debug("Trying method %s...", m->name); 273 if (m->detect(a)) 274 { 275 a->debug("...OK\n"); 276 a->methods = m; 277 a->method = probe_sequence[i]; 278 break; 279 } 280 a->debug("...No.\n"); 281 } 282 if (!a->methods) 283 a->error("Cannot find any working access method."); 284 } 285 a->debug("Decided to use %s\n", a->methods->name); 286 a->methods->init(a); 287 } 288 289 STATIC_ALIAS(void pci_init(struct pci_access *a), pci_init_v35(a)); 290 DEFINE_ALIAS(void pci_init_v30(struct pci_access *a), pci_init_v35); 291 SYMBOL_VERSION(pci_init_v30, pci_init@LIBPCI_3.0); 292 SYMBOL_VERSION(pci_init_v35, pci_init@@LIBPCI_3.5); 293 294 void 295 pci_cleanup(struct pci_access *a) 296 { 297 struct pci_dev *d, *e; 298 299 for (d=a->devices; d; d=e) 300 { 301 e = d->next; 302 pci_free_dev(d); 303 } 304 if (a->methods) 305 a->methods->cleanup(a); 306 pci_free_name_list(a); 307 pci_free_params(a); 308 pci_set_name_list_path(a, NULL, 0); 309 pci_mfree(a); 310 } 311