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/*
* The PCI Library -- Looking up Names via UDEV and HWDB
*
* Copyright (c) 2013--2014 Tom Gundersen <teg@jklm.no>
* Copyright (c) 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 <string.h>
#include "internal.h"
#include "names.h"
#ifdef PCI_HAVE_HWDB
#include <libudev.h>
#include <stdio.h>
#include <stdlib.h>
char *
pci_id_hwdb_lookup(struct pci_access *a, int cat, int id1, int id2, int id3, int id4)
{
char modalias[64];
const char *key = NULL;
const char *disabled = pci_get_param(a, "hwdb.disable");
if (disabled && atoi(disabled))
return NULL;
switch (cat)
{
case ID_VENDOR:
sprintf(modalias, "pci:v%08X*", id1);
key = "ID_VENDOR_FROM_DATABASE";
break;
case ID_DEVICE:
sprintf(modalias, "pci:v%08Xd%08X*", id1, id2);
key = "ID_MODEL_FROM_DATABASE";
break;
case ID_SUBSYSTEM:
sprintf(modalias, "pci:v%08Xd%08Xsv%08Xsd%08X*", id1, id2, id3, id4);
key = "ID_MODEL_FROM_DATABASE";
break;
case ID_GEN_SUBSYSTEM:
sprintf(modalias, "pci:v*d*sv%08Xsd%08X*", id1, id2);
key = "ID_MODEL_FROM_DATABASE";
break;
case ID_CLASS:
sprintf(modalias, "pci:v*d*sv*sd*bc%02X*", id1);
key = "ID_PCI_CLASS_FROM_DATABASE";
break;
case ID_SUBCLASS:
sprintf(modalias, "pci:v*d*sv*sd*bc%02Xsc%02X*", id1, id2);
key = "ID_PCI_SUBCLASS_FROM_DATABASE";
break;
case ID_PROGIF:
sprintf(modalias, "pci:v*d*sv*sd*bc%02Xsc%02Xi%02X*", id1, id2, id3);
key = "ID_PCI_INTERFACE_FROM_DATABASE";
break;
}
if (key)
{
if (!a->id_udev_hwdb)
{
a->debug("Initializing UDEV HWDB\n");
a->id_udev = udev_new();
a->id_udev_hwdb = udev_hwdb_new(a->id_udev);
}
struct udev_list_entry *entry;
udev_list_entry_foreach(entry, udev_hwdb_get_properties_list_entry(a->id_udev_hwdb, modalias, 0))
{
const char *entry_name = udev_list_entry_get_name(entry);
if (entry_name && !strcmp(entry_name, key))
{
const char *entry_value = udev_list_entry_get_value(entry);
if (entry_value)
return pci_strdup(a, entry_value);
}
}
}
return NULL;
}
void
pci_id_hwdb_free(struct pci_access *a)
{
if (a->id_udev_hwdb)
{
udev_hwdb_unref(a->id_udev_hwdb);
a->id_udev_hwdb = NULL;
}
if (a->id_udev)
{
udev_unref(a->id_udev);
a->id_udev = NULL;
}
}
#else
char *
pci_id_hwdb_lookup(struct pci_access *a UNUSED, int cat UNUSED, int id1 UNUSED, int id2 UNUSED, int id3 UNUSED, int id4 UNUSED)
{
return NULL;
}
void
pci_id_hwdb_free(struct pci_access *a UNUSED)
{
}
#endif
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