1/*	$NetBSD: pci_drvname.c,v 1.3 2021/12/11 19:24:19 mrg Exp $	*/
2
3/*
4 * Copyright (c) 2014 Matthew R. Green
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#include <sys/cdefs.h>
30__RCSID("$NetBSD: pci_drvname.c,v 1.3 2021/12/11 19:24:19 mrg Exp $");
31
32#include <sys/types.h>
33#include <sys/ioctl.h>
34#include <string.h>
35
36#include <pci.h>
37
38#include <dev/pci/pciio.h>
39
40/*
41 * pci_drvname:
42 *
43 *	What's the driver name for a PCI device?
44 */
45int
46pci_drvname(int fd, u_int device, u_int func, char *name, size_t len)
47{
48	struct pciio_drvname drvname;
49	int rv;
50
51	drvname.device = device;
52	drvname.function = func;
53
54	rv = ioctl(fd, PCI_IOC_DRVNAME, &drvname);
55	if (rv == -1)
56		return -1;
57
58	strlcpy(name, drvname.name, len);
59	return 0;
60}
61
62/*
63 * pci_drvnameonbus:
64 *
65 *	What's the driver name for a PCI device on any PCI bus?
66 */
67int
68pci_drvnameonbus(int fd, u_int bus, u_int device, u_int func, char *name,
69		 size_t len)
70{
71	struct pciio_drvnameonbus drvname;
72	int rv;
73
74	drvname.bus = bus;
75	drvname.device = device;
76	drvname.function = func;
77
78	rv = ioctl(fd, PCI_IOC_DRVNAMEONBUS, &drvname);
79	if (rv == -1)
80		return -1;
81
82	strlcpy(name, drvname.name, len);
83	return 0;
84}
85