lib/init.c

   1 /*
   2  *      The PCI Library -- Initialization and related things
   3  *
   4  *      Copyright (c) 1997--2008 Martin Mares <mj@ucw.cz>
   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 static struct pci_methods *pci_methods[PCI_ACCESS_MAX] = {
  17   NULL,
  18 #ifdef PCI_HAVE_PM_LINUX_SYSFS
  19   &pm_linux_sysfs,
  20 #else
  21   NULL,
  22 #endif
  23 #ifdef PCI_HAVE_PM_LINUX_PROC
  24   &pm_linux_proc,
  25 #else
  26   NULL,
  27 #endif
  28 #ifdef PCI_HAVE_PM_INTEL_CONF
  29   &pm_intel_conf1,
  30   &pm_intel_conf2,
  31 #else
  32   NULL,
  33   NULL,
  34 #endif
  35 #ifdef PCI_HAVE_PM_FBSD_DEVICE
  36   &pm_fbsd_device,
  37 #else
  38   NULL,
  39 #endif
  40 #ifdef PCI_HAVE_PM_AIX_DEVICE
  41   &pm_aix_device,
  42 #else
  43   NULL,
  44 #endif
  45 #ifdef PCI_HAVE_PM_NBSD_LIBPCI
  46   &pm_nbsd_libpci,
  47 #else
  48   NULL,
  49 #endif
  50 #ifdef PCI_HAVE_PM_OBSD_DEVICE
  51   &pm_obsd_device,
  52 #else
  53   NULL,
  54 #endif
  55 #ifdef PCI_HAVE_PM_DUMP
  56   &pm_dump,
  57 #else
  58   NULL,
  59 #endif
  60 #ifdef PCI_HAVE_PM_DARWIN_DEVICE
  61   &pm_darwin,
  62 #else
  63   NULL,
  64 #endif
  65 };
  66
  67 void *
  68 pci_malloc(struct pci_access *a, int size)
  69 {
  70   void *x = malloc(size);
  71
  72   if (!x)
  73     a->error("Out of memory (allocation of %d bytes failed)", size);
  74   return x;
  75 }
  76
  77 void
  78 pci_mfree(void *x)
  79 {
  80   if (x)
  81     free(x);
  82 }
  83
  84 char *
  85 pci_strdup(struct pci_access *a, const char *s)
  86 {
  87   int len = strlen(s) + 1;
  88   char *t = pci_malloc(a, len);
  89   memcpy(t, s, len);
  90   return t;
  91 }
  92
  93 static void
  94 pci_generic_error(char *msg, ...)
  95 {
  96   va_list args;
  97
  98   va_start(args, msg);
  99   fputs("pcilib: ", stderr);
 100   vfprintf(stderr, msg, args);
 101   fputc('\n', stderr);
 102   exit(1);
 103 }
 104
 105 static void
 106 pci_generic_warn(char *msg, ...)
 107 {
 108   va_list args;
 109
 110   va_start(args, msg);
 111   fputs("pcilib: ", stderr);
 112   vfprintf(stderr, msg, args);
 113   fputc('\n', stderr);
 114 }
 115
 116 static void
 117 pci_generic_debug(char *msg, ...)
 118 {
 119   va_list args;
 120
 121   va_start(args, msg);
 122   vfprintf(stdout, msg, args);
 123   va_end(args);
 124 }
 125
 126 static void
 127 pci_null_debug(char *msg UNUSED, ...)
 128 {
 129 }
 130
 131 int
 132 pci_lookup_method(char *name)
 133 {
 134   int i;
 135
 136   for (i=0; i<PCI_ACCESS_MAX; i++)
 137     if (pci_methods[i] && !strcmp(pci_methods[i]->name, name))
 138       return i;
 139   return -1;
 140 }
 141
 142 char *
 143 pci_get_method_name(int index)
 144 {
 145   if (index < 0 || index >= PCI_ACCESS_MAX)
 146     return NULL;
 147   else if (!pci_methods[index])
 148     return "";
 149   else
 150     return pci_methods[index]->name;
 151 }
 152
 153 struct pci_access *
 154 pci_alloc(void)
 155 {
 156   struct pci_access *a = malloc(sizeof(struct pci_access));
 157   int i;
 158
 159   memset(a, 0, sizeof(*a));
 160   pci_set_name_list_path(a, PCI_PATH_IDS_DIR "/" PCI_IDS, 0);
 161 #ifdef PCI_USE_DNS
 162   pci_define_param(a, "net.domain", PCI_ID_DOMAIN, "DNS domain used for resolving of ID's");
 163   pci_define_param(a, "net.cache_name", "~/.pciids-cache", "Name of the ID cache file");
 164   a->id_lookup_mode = PCI_LOOKUP_CACHE;
 165 #endif
 166 #ifdef PCI_HAVE_HWDB
 167   pci_define_param(a, "hwdb.disable", "0", "Do not look up names in UDEV's HWDB if non-zero");
 168 #endif
 169   for (i=0; i<PCI_ACCESS_MAX; i++)
 170     if (pci_methods[i] && pci_methods[i]->config)
 171       pci_methods[i]->config(a);
 172   return a;
 173 }
 174
 175 void
 176 pci_init_v34(struct pci_access *a)
 177 {
 178   if (!a->error)
 179     a->error = pci_generic_error;
 180   if (!a->warning)
 181     a->warning = pci_generic_warn;
 182   if (!a->debug)
 183     a->debug = pci_generic_debug;
 184   if (!a->debugging)
 185     a->debug = pci_null_debug;
 186
 187   if (a->method)
 188     {
 189       if (a->method >= PCI_ACCESS_MAX || !pci_methods[a->method])
 190         a->error("This access method is not supported.");
 191       a->methods = pci_methods[a->method];
 192     }
 193   else
 194     {
 195       unsigned int i;
 196       for (i=0; i<PCI_ACCESS_MAX; i++)
 197         if (pci_methods[i])
 198           {
 199             a->debug("Trying method %d...", i);
 200             if (pci_methods[i]->detect(a))
 201               {
 202                 a->debug("...OK\n");
 203                 a->methods = pci_methods[i];
 204                 a->method = i;
 205                 break;
 206               }
 207             a->debug("...No.\n");
 208           }
 209       if (!a->methods)
 210         a->error("Cannot find any working access method.");
 211     }
 212   a->debug("Decided to use %s\n", a->methods->name);
 213   a->methods->init(a);
 214 }
 215
 216 STATIC_ALIAS(void pci_init(struct pci_access *a), pci_init_v34(a));
 217 SYMBOL_VERSION(pci_init_v34, pci_init@@LIBPCI_3.4);
 218
 219 void
 220 pci_cleanup(struct pci_access *a)
 221 {
 222   struct pci_dev *d, *e;
 223
 224   for (d=a->devices; d; d=e)
 225     {
 226       e = d->next;
 227       pci_free_dev(d);
 228     }
 229   if (a->methods)
 230     a->methods->cleanup(a);
 231   pci_free_name_list(a);
 232   pci_free_params(a);
 233   pci_set_name_list_path(a, NULL, 0);
 234   pci_mfree(a);
 235 }