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 */
45 int
pci_drvname(int fd,u_int device,u_int func,char * name,size_t len)46 pci_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 */
67 int
pci_drvnameonbus(int fd,u_int bus,u_int device,u_int func,char * name,size_t len)68 pci_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