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/*
* The PCI Library -- ID to Name Translation
*
* Copyright (c) 1997--2014 Martin Mares <mj@ucw.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL v2+.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include "internal.h"
#include "names.h"
static char *id_lookup(struct pci_access *a, int flags, int cat, int id1, int id2, int id3, int id4)
{
char *name;
int tried_hwdb = 0;
while (!(name = pci_id_lookup(a, flags, cat, id1, id2, id3, id4)))
{
if ((flags & PCI_LOOKUP_CACHE) && !a->id_cache_status)
{
if (pci_id_cache_load(a, flags))
continue;
}
if (!tried_hwdb && !(flags & (PCI_LOOKUP_SKIP_LOCAL | PCI_LOOKUP_NO_HWDB)))
{
tried_hwdb = 1;
if (name = pci_id_hwdb_lookup(a, cat, id1, id2, id3, id4))
{
pci_id_insert(a, cat, id1, id2, id3, id4, name, SRC_HWDB);
pci_mfree(name);
continue;
}
}
if (flags & PCI_LOOKUP_NETWORK)
{
if (name = pci_id_net_lookup(a, cat, id1, id2, id3, id4))
{
pci_id_insert(a, cat, id1, id2, id3, id4, name, SRC_NET);
pci_mfree(name);
pci_id_cache_dirty(a);
}
else
pci_id_insert(a, cat, id1, id2, id3, id4, "", SRC_NET);
/* We want to iterate the lookup to get the allocated ID entry from the hash */
continue;
}
return NULL;
}
return (name[0] ? name : NULL);
}
static char *
id_lookup_subsys(struct pci_access *a, int flags, int iv, int id, int isv, int isd)
{
char *d = NULL;
if (iv > 0 && id > 0) /* Per-device lookup */
d = id_lookup(a, flags, ID_SUBSYSTEM, iv, id, isv, isd);
if (!d) /* Generic lookup */
d = id_lookup(a, flags, ID_GEN_SUBSYSTEM, isv, isd, 0, 0);
if (!d && iv == isv && id == isd) /* Check for subsystem == device */
d = id_lookup(a, flags, ID_DEVICE, iv, id, 0, 0);
return d;
}
static char *
format_name(char *buf, int size, int flags, char *name, char *num, char *unknown)
{
int res;
if ((flags & PCI_LOOKUP_NO_NUMBERS) && !name)
return NULL;
else if (flags & PCI_LOOKUP_NUMERIC)
res = snprintf(buf, size, "%s", num);
else if (!name)
res = snprintf(buf, size, ((flags & PCI_LOOKUP_MIXED) ? "%s [%s]" : "%s %s"), unknown, num);
else if (!(flags & PCI_LOOKUP_MIXED))
res = snprintf(buf, size, "%s", name);
else
res = snprintf(buf, size, "%s [%s]", name, num);
if (res >= size && size >= 4)
buf[size-2] = buf[size-3] = buf[size-4] = '.';
else if (res < 0 || res >= size)
return "<pci_lookup_name: buffer too small>";
return buf;
}
static char *
format_name_pair(char *buf, int size, int flags, char *v, char *d, char *num)
{
int res;
if ((flags & PCI_LOOKUP_NO_NUMBERS) && (!v || !d))
return NULL;
if (flags & PCI_LOOKUP_NUMERIC)
res = snprintf(buf, size, "%s", num);
else if (flags & PCI_LOOKUP_MIXED)
{
if (v && d)
res = snprintf(buf, size, "%s %s [%s]", v, d, num);
else if (!v)
res = snprintf(buf, size, "Device [%s]", num);
else /* v && !d */
res = snprintf(buf, size, "%s Device [%s]", v, num);
}
else
{
if (v && d)
res = snprintf(buf, size, "%s %s", v, d);
else if (!v)
res = snprintf(buf, size, "Device %s", num);
else /* v && !d */
res = snprintf(buf, size, "%s Device %s", v, num+5);
}
if (res >= size && size >= 4)
buf[size-2] = buf[size-3] = buf[size-4] = '.';
else if (res < 0 || res >= size)
return "<pci_lookup_name: buffer too small>";
return buf;
}
char *
pci_lookup_name(struct pci_access *a, char *buf, int size, int flags, ...)
{
va_list args;
char *v, *d, *cls, *pif;
int iv, id, isv, isd, icls, ipif;
char numbuf[16], pifbuf[32];
va_start(args, flags);
flags |= a->id_lookup_mode;
if (!(flags & PCI_LOOKUP_NO_NUMBERS))
{
if (a->numeric_ids > 1)
flags |= PCI_LOOKUP_MIXED;
else if (a->numeric_ids)
flags |= PCI_LOOKUP_NUMERIC;
}
if (flags & PCI_LOOKUP_MIXED)
flags &= ~PCI_LOOKUP_NUMERIC;
if (!a->id_load_attempted && !(flags & (PCI_LOOKUP_NUMERIC | PCI_LOOKUP_SKIP_LOCAL)))
pci_load_name_list(a);
switch (flags & 0xffff)
{
case PCI_LOOKUP_VENDOR:
iv = va_arg(args, int);
sprintf(numbuf, "%04x", iv);
va_end(args);
return format_name(buf, size, flags, id_lookup(a, flags, ID_VENDOR, iv, 0, 0, 0), numbuf, "Vendor");
case PCI_LOOKUP_DEVICE:
iv = va_arg(args, int);
id = va_arg(args, int);
sprintf(numbuf, "%04x", id);
va_end(args);
return format_name(buf, size, flags, id_lookup(a, flags, ID_DEVICE, iv, id, 0, 0), numbuf, "Device");
case PCI_LOOKUP_VENDOR | PCI_LOOKUP_DEVICE:
iv = va_arg(args, int);
id = va_arg(args, int);
sprintf(numbuf, "%04x:%04x", iv, id);
v = id_lookup(a, flags, ID_VENDOR, iv, 0, 0, 0);
d = id_lookup(a, flags, ID_DEVICE, iv, id, 0, 0);
va_end(args);
return format_name_pair(buf, size, flags, v, d, numbuf);
case PCI_LOOKUP_SUBSYSTEM | PCI_LOOKUP_VENDOR:
isv = va_arg(args, int);
sprintf(numbuf, "%04x", isv);
v = id_lookup(a, flags, ID_VENDOR, isv, 0, 0, 0);
va_end(args);
return format_name(buf, size, flags, v, numbuf, "Unknown vendor");
case PCI_LOOKUP_SUBSYSTEM | PCI_LOOKUP_DEVICE:
iv = va_arg(args, int);
id = va_arg(args, int);
isv = va_arg(args, int);
isd = va_arg(args, int);
sprintf(numbuf, "%04x", isd);
va_end(args);
return format_name(buf, size, flags, id_lookup_subsys(a, flags, iv, id, isv, isd), numbuf, "Device");
case PCI_LOOKUP_VENDOR | PCI_LOOKUP_DEVICE | PCI_LOOKUP_SUBSYSTEM:
iv = va_arg(args, int);
id = va_arg(args, int);
isv = va_arg(args, int);
isd = va_arg(args, int);
v = id_lookup(a, flags, ID_VENDOR, isv, 0, 0, 0);
d = id_lookup_subsys(a, flags, iv, id, isv, isd);
sprintf(numbuf, "%04x:%04x", isv, isd);
va_end(args);
return format_name_pair(buf, size, flags, v, d, numbuf);
case PCI_LOOKUP_CLASS:
icls = va_arg(args, int);
sprintf(numbuf, "%04x", icls);
cls = id_lookup(a, flags, ID_SUBCLASS, icls >> 8, icls & 0xff, 0, 0);
if (!cls && (cls = id_lookup(a, flags, ID_CLASS, icls >> 8, 0, 0, 0)))
{
if (!(flags & PCI_LOOKUP_NUMERIC)) /* Include full class number */
flags |= PCI_LOOKUP_MIXED;
}
va_end(args);
return format_name(buf, size, flags, cls, numbuf, "Class");
case PCI_LOOKUP_PROGIF:
icls = va_arg(args, int);
ipif = va_arg(args, int);
sprintf(numbuf, "%02x", ipif);
pif = id_lookup(a, flags, ID_PROGIF, icls >> 8, icls & 0xff, ipif, 0);
if (!pif && icls == 0x0101 && !(ipif & 0x70))
{
/* IDE controllers have complex prog-if semantics */
sprintf(pifbuf, "%s%s%s%s%s",
(ipif & 0x80) ? " Master" : "",
(ipif & 0x08) ? " SecP" : "",
(ipif & 0x04) ? " SecO" : "",
(ipif & 0x02) ? " PriP" : "",
(ipif & 0x01) ? " PriO" : "");
pif = pifbuf;
if (*pif)
pif++;
}
va_end(args);
return format_name(buf, size, flags, pif, numbuf, "ProgIf");
default:
va_end(args);
return "<pci_lookup_name: invalid request>";
}
}
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