pci_drvname.c revision 1.2 
1/*	$NetBSD: pci_drvname.c,v 1.2 2016/09/24 23:12:54 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 * 3. The name of the author may not be used to endorse or promote products
16 *    derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
23 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
25 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30
31#include <sys/cdefs.h>
32__RCSID("$NetBSD: pci_drvname.c,v 1.2 2016/09/24 23:12:54 mrg Exp $");
33
34#include <sys/types.h>
35#include <sys/ioctl.h>
36#include <string.h>
37
38#include <pci.h>
39
40#include <dev/pci/pciio.h>
41
42/*
43 * pci_drvname:
44 *
45 *	What's the driver name for a PCI device?
46 */
47int
48pci_drvname(int fd, u_int device, u_int func, char *name, size_t len)
49{
50	struct pciio_drvname drvname;
51	int rv;
52
53	drvname.device = device;
54	drvname.function = func;
55
56	rv = ioctl(fd, PCI_IOC_DRVNAME, &drvname);
57	if (rv == -1)
58		return -1;
59
60	strlcpy(name, drvname.name, len);
61	return 0;
62}
63
64/*
65 * pci_drvnameonbus:
66 *
67 *	What's the driver name for a PCI device on any PCI bus?
68 */
69int
70pci_drvnameonbus(int fd, u_int bus, u_int device, u_int func, char *name,
71		 size_t len)
72{
73	struct pciio_drvnameonbus drvname;
74	int rv;
75
76	drvname.bus = bus;
77	drvname.device = device;
78	drvname.function = func;
79
80	rv = ioctl(fd, PCI_IOC_DRVNAMEONBUS, &drvname);
81	if (rv == -1)
82		return -1;
83
84	strlcpy(name, drvname.name, len);
85	return 0;
86}
87