pciconf.c revision 19102 
1/*
2 * Copyright 1996 Massachusetts Institute of Technology
3 *
4 * Permission to use, copy, modify, and distribute this software and
5 * its documentation for any purpose and without fee is hereby
6 * granted, provided that both the above copyright notice and this
7 * permission notice appear in all copies, that both the above
8 * copyright notice and this permission notice appear in all
9 * supporting documentation, and that the name of M.I.T. not be used
10 * in advertising or publicity pertaining to distribution of the
11 * software without specific, written prior permission.  M.I.T. makes
12 * no representations about the suitability of this software for any
13 * purpose.  It is provided "as is" without express or implied
14 * warranty.
15 *
16 * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''.  M.I.T. DISCLAIMS
17 * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
18 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
20 * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
23 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
26 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 *	$ANA: pciconf.c,v 1.1.1.1 1996/09/25 21:12:57 wollman Exp $
30 */
31
32#include <sys/types.h>
33#include <sys/fcntl.h>
34
35#include <err.h>
36#include <stdlib.h>
37#include <stdio.h>
38#include <string.h>
39#include <unistd.h>
40
41#include <pci/pcivar.h>
42#include <pci/pci_ioctl.h>
43
44#include "pathnames.h"
45
46static void list_devs(void);
47static void readit(const char *, const char *, int);
48static void writeit(const char *, const char *, const char *, int);
49
50
51static void
52usage(const char *argv0) {
53	fprintf(stderr, "usage:\n\t%s -l\n"
54		"\t%s [-r|-w] [-bh] sel addr [value]\n",
55		argv0, argv0);
56}
57
58int
59main(int argc, char **argv)
60{
61	int c;
62	int listmode, readmode, writemode;
63	int byte, isshort;
64
65	listmode = readmode = writemode = byte = isshort = 0;
66
67	while ((c = getopt(argc, argv, "lrwbh")) != EOF) {
68		switch(c) {
69		case 'l':
70			listmode = 1;
71			break;
72
73		case 'r':
74			readmode = 1;
75			break;
76
77		case 'w':
78			writemode = 1;
79			break;
80
81		case 'b':
82			byte = 1;
83			break;
84
85		case 'h':
86			isshort = 1;
87			break;
88
89		default:
90			usage(argv[0]);
91		}
92	}
93
94	if ((listmode && optind != argc)
95	    || (writemode && optind + 3 != argc)
96	    || (readmode && optind + 2 != argc))
97		usage(argv[0]);
98
99	if (listmode) {
100		list_devs();
101	} else if(readmode) {
102		readit(argv[optind], argv[optind + 1],
103		       byte ? 1 : isshort ? 2 : 4);
104	} else if(writemode) {
105		writeit(argv[optind], argv[optind + 1], argv[optind + 2],
106		       byte ? 1 : isshort ? 2 : 4);
107	} else {
108 		usage(argv[0]);
109	}
110
111	return 0;
112}
113
114static void
115list_devs(void)
116{
117	int fd;
118	struct pci_conf_io pc;
119	struct pci_conf conf[255], *p;
120
121	fd = open(_PATH_DEVPCI, O_RDONLY, 0);
122	if (fd < 0)
123		err(1, "%s", _PATH_DEVPCI);
124
125	pc.pci_len = sizeof(conf);
126	pc.pci_buf = conf;
127
128	if (ioctl(fd, PCIOCGETCONF, &pc) < 0)
129		err(1, "ioctl(PCIOCGETCONF)");
130
131	close(fd);
132
133	for (p = conf; p < &conf[pc.pci_len / sizeof conf[0]]; p++) {
134	    printf("pci%d:%d:%d:\tclass=0x%06x card=0x%08lx chip=0x%08lx rev=0x%02x\n",
135		   p->pc_sel.pc_bus, p->pc_sel.pc_dev, p->pc_sel.pc_func,
136		   p->pc_class >> 8, p->pc_subid,
137		   p->pc_devid, p->pc_class & 0xff);
138	}
139}
140
141static struct pcisel
142getsel(const char *str)
143{
144	char *ep = (char*) str;
145	struct pcisel sel;
146
147	if (strncmp(ep, "pci", 3) == 0) {
148		ep += 3;
149		sel.pc_bus = strtoul(ep, &ep, 0);
150		if (!ep || *ep++ != ':')
151			errx(1, "cannot parse selector %s", str);
152		sel.pc_dev = strtoul(ep, &ep, 0);
153		if (!ep || *ep != ':') {
154			sel.pc_func = 0;
155		} else {
156			ep++;
157			sel.pc_func = strtoul(ep, &ep, 0);
158		}
159	}
160	if (*ep == ':')
161		ep++;
162	if (*ep || ep == str)
163		errx(1, "cannot parse selector %s", str);
164	return sel;
165}
166
167static void
168readit(const char *name, const char *reg, int width)
169{
170	int fd;
171	struct pci_io pi;
172
173	pi.pi_sel = getsel(name);
174	pi.pi_reg = strtoul(reg, (char **)0, 0); /* XXX error check */
175	pi.pi_width = width;
176
177	fd = open(_PATH_DEVPCI, O_RDWR, 0);
178	if (fd < 0)
179		err(1, "%s", _PATH_DEVPCI);
180
181	if (ioctl(fd, PCIOCREAD, &pi) < 0)
182		err(1, "ioctl(PCIOCREAD)");
183
184	printf("0x%08x\n", pi.pi_data);
185}
186
187static void
188writeit(const char *name, const char *reg, const char *data, int width)
189{
190	int fd;
191	struct pci_io pi;
192
193	pi.pi_sel = getsel(name);
194	pi.pi_reg = strtoul(reg, (char **)0, 0); /* XXX error check */
195	pi.pi_width = width;
196	pi.pi_data = strtoul(data, (char **)0, 0); /* XXX error check */
197
198	fd = open(_PATH_DEVPCI, O_RDWR, 0);
199	if (fd < 0)
200		err(1, "%s", _PATH_DEVPCI);
201
202	if (ioctl(fd, PCIOCWRITE, &pi) < 0)
203		err(1, "ioctl(PCIOCWRITE)");
204}
205