lib/names.c

   1 /*
   2  *      The PCI Library -- ID to Name Translation
   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 <stdarg.h>
  11 #include <string.h>
  12
  13 #include "internal.h"
  14 #include "names.h"
  15
  16 static char *id_lookup(struct pci_access *a, int flags, int cat, int id1, int id2, int id3, int id4)
  17 {
  18   char *name;
  19
  20   while (!(name = pci_id_lookup(a, flags, cat, id1, id2, id3, id4)))
  21     {
  22       if ((flags & PCI_LOOKUP_CACHE) && !a->id_cache_status)
  23         {
  24           if (pci_id_cache_load(a, flags))
  25             continue;
  26         }
  27       if (flags & PCI_LOOKUP_NETWORK)
  28         {
  29           if (name = pci_id_net_lookup(a, cat, id1, id2, id3, id4))
  30             {
  31               pci_id_insert(a, cat, id1, id2, id3, id4, name, SRC_NET);
  32               pci_mfree(name);
  33               pci_id_cache_dirty(a);
  34             }
  35           else
  36             pci_id_insert(a, cat, id1, id2, id3, id4, "", SRC_NET);
  37           /* We want to iterate the lookup to get the allocated ID entry from the hash */
  38           continue;
  39         }
  40       return NULL;
  41     }
  42   return (name[0] ? name : NULL);
  43 }
  44
  45 static char *
  46 id_lookup_subsys(struct pci_access *a, int flags, int iv, int id, int isv, int isd)
  47 {
  48   char *d = NULL;
  49   if (iv > 0 && id > 0)                                         /* Per-device lookup */
  50     d = id_lookup(a, flags, ID_SUBSYSTEM, iv, id, isv, isd);
  51   if (!d)                                                       /* Generic lookup */
  52     d = id_lookup(a, flags, ID_GEN_SUBSYSTEM, isv, isd, 0, 0);
  53   if (!d && iv == isv && id == isd)                             /* Check for subsystem == device */
  54     d = id_lookup(a, flags, ID_DEVICE, iv, id, 0, 0);
  55   return d;
  56 }
  57
  58 static char *
  59 format_name(char *buf, int size, int flags, char *name, char *num, char *unknown)
  60 {
  61   int res;
  62   if ((flags & PCI_LOOKUP_NO_NUMBERS) && !name)
  63     return NULL;
  64   else if (flags & PCI_LOOKUP_NUMERIC)
  65     res = snprintf(buf, size, "%s", num);
  66   else if (!name)
  67     res = snprintf(buf, size, ((flags & PCI_LOOKUP_MIXED) ? "%s [%s]" : "%s %s"), unknown, num);
  68   else if (!(flags & PCI_LOOKUP_MIXED))
  69     res = snprintf(buf, size, "%s", name);
  70   else
  71     res = snprintf(buf, size, "%s [%s]", name, num);
  72   if (res >= size && size >= 4)
  73     buf[size-2] = buf[size-3] = buf[size-4] = '.';
  74   else if (res < 0 || res >= size)
  75     return "<pci_lookup_name: buffer too small>";
  76   return buf;
  77 }
  78
  79 static char *
  80 format_name_pair(char *buf, int size, int flags, char *v, char *d, char *num)
  81 {
  82   int res;
  83   if ((flags & PCI_LOOKUP_NO_NUMBERS) && (!v || !d))
  84     return NULL;
  85   if (flags & PCI_LOOKUP_NUMERIC)
  86     res = snprintf(buf, size, "%s", num);
  87   else if (flags & PCI_LOOKUP_MIXED)
  88     {
  89       if (v && d)
  90         res = snprintf(buf, size, "%s %s [%s]", v, d, num);
  91       else if (!v)
  92         res = snprintf(buf, size, "Device [%s]", num);
  93       else /* v && !d */
  94         res = snprintf(buf, size, "%s Device [%s]", v, num);
  95     }
  96   else
  97     {
  98       if (v && d)
  99         res = snprintf(buf, size, "%s %s", v, d);
 100       else if (!v)
 101         res = snprintf(buf, size, "Device %s", num);
 102       else /* v && !d */
 103         res = snprintf(buf, size, "%s Device %s", v, num+5);
 104     }
 105   if (res >= size && size >= 4)
 106     buf[size-2] = buf[size-3] = buf[size-4] = '.';
 107   else if (res < 0 || res >= size)
 108     return "<pci_lookup_name: buffer too small>";
 109   return buf;
 110 }
 111
 112 char *
 113 pci_lookup_name(struct pci_access *a, char *buf, int size, int flags, ...)
 114 {
 115   va_list args;
 116   char *v, *d, *cls, *pif;
 117   int iv, id, isv, isd, icls, ipif;
 118   char numbuf[16], pifbuf[32];
 119
 120   va_start(args, flags);
 121
 122   flags |= a->id_lookup_mode;
 123   if (!(flags & PCI_LOOKUP_NO_NUMBERS))
 124     {
 125       if (a->numeric_ids > 1)
 126         flags |= PCI_LOOKUP_MIXED;
 127       else if (a->numeric_ids)
 128         flags |= PCI_LOOKUP_NUMERIC;
 129     }
 130   if (flags & PCI_LOOKUP_MIXED)
 131     flags &= ~PCI_LOOKUP_NUMERIC;
 132
 133   if (!a->id_hash && !(flags & (PCI_LOOKUP_NUMERIC | PCI_LOOKUP_SKIP_LOCAL)) && !a->id_load_failed)
 134     pci_load_name_list(a);
 135
 136   switch (flags & 0xffff)
 137     {
 138     case PCI_LOOKUP_VENDOR:
 139       iv = va_arg(args, int);
 140       sprintf(numbuf, "%04x", iv);
 141       return format_name(buf, size, flags, id_lookup(a, flags, ID_VENDOR, iv, 0, 0, 0), numbuf, "Vendor");
 142     case PCI_LOOKUP_DEVICE:
 143       iv = va_arg(args, int);
 144       id = va_arg(args, int);
 145       sprintf(numbuf, "%04x", id);
 146       return format_name(buf, size, flags, id_lookup(a, flags, ID_DEVICE, iv, id, 0, 0), numbuf, "Device");
 147     case PCI_LOOKUP_VENDOR | PCI_LOOKUP_DEVICE:
 148       iv = va_arg(args, int);
 149       id = va_arg(args, int);
 150       sprintf(numbuf, "%04x:%04x", iv, id);
 151       v = id_lookup(a, flags, ID_VENDOR, iv, 0, 0, 0);
 152       d = id_lookup(a, flags, ID_DEVICE, iv, id, 0, 0);
 153       return format_name_pair(buf, size, flags, v, d, numbuf);
 154     case PCI_LOOKUP_SUBSYSTEM | PCI_LOOKUP_VENDOR:
 155       isv = va_arg(args, int);
 156       sprintf(numbuf, "%04x", isv);
 157       v = id_lookup(a, flags, ID_VENDOR, isv, 0, 0, 0);
 158       return format_name(buf, size, flags, v, numbuf, "Unknown vendor");
 159     case PCI_LOOKUP_SUBSYSTEM | PCI_LOOKUP_DEVICE:
 160       iv = va_arg(args, int);
 161       id = va_arg(args, int);
 162       isv = va_arg(args, int);
 163       isd = va_arg(args, int);
 164       sprintf(numbuf, "%04x", isd);
 165       return format_name(buf, size, flags, id_lookup_subsys(a, flags, iv, id, isv, isd), numbuf, "Device");
 166     case PCI_LOOKUP_VENDOR | PCI_LOOKUP_DEVICE | PCI_LOOKUP_SUBSYSTEM:
 167       iv = va_arg(args, int);
 168       id = va_arg(args, int);
 169       isv = va_arg(args, int);
 170       isd = va_arg(args, int);
 171       v = id_lookup(a, flags, ID_VENDOR, isv, 0, 0, 0);
 172       d = id_lookup_subsys(a, flags, iv, id, isv, isd);
 173       sprintf(numbuf, "%04x:%04x", isv, isd);
 174       return format_name_pair(buf, size, flags, v, d, numbuf);
 175     case PCI_LOOKUP_CLASS:
 176       icls = va_arg(args, int);
 177       sprintf(numbuf, "%04x", icls);
 178       cls = id_lookup(a, flags, ID_SUBCLASS, icls >> 8, icls & 0xff, 0, 0);
 179       if (!cls && (cls = id_lookup(a, flags, ID_CLASS, icls >> 8, 0, 0, 0)))
 180         {
 181           if (!(flags & PCI_LOOKUP_NUMERIC)) /* Include full class number */
 182             flags |= PCI_LOOKUP_MIXED;
 183         }
 184       return format_name(buf, size, flags, cls, numbuf, "Class");
 185     case PCI_LOOKUP_PROGIF:
 186       icls = va_arg(args, int);
 187       ipif = va_arg(args, int);
 188       sprintf(numbuf, "%02x", ipif);
 189       pif = id_lookup(a, flags, ID_PROGIF, icls >> 8, icls & 0xff, ipif, 0);
 190       if (!pif && icls == 0x0101 && !(ipif & 0x70))
 191         {
 192           /* IDE controllers have complex prog-if semantics */
 193           sprintf(pifbuf, "%s%s%s%s%s",
 194                   (ipif & 0x80) ? " Master" : "",
 195                   (ipif & 0x08) ? " SecP" : "",
 196                   (ipif & 0x04) ? " SecO" : "",
 197                   (ipif & 0x02) ? " PriP" : "",
 198                   (ipif & 0x01) ? " PriO" : "");
 199           pif = pifbuf;
 200           if (*pif)
 201             pif++;
 202         }
 203       return format_name(buf, size, flags, pif, numbuf, "ProgIf");
 204     default:
 205       return "<pci_lookup_name: invalid request>";
 206     }
 207 }