pciconf.c revision 68677 
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
30#ifndef lint
31static const char rcsid[] =
32  "$FreeBSD: head/usr.sbin/pciconf/pciconf.c 68677 2000-11-13 12:08:29Z msmith $";
33#endif /* not lint */
34
35#include <sys/types.h>
36#include <sys/fcntl.h>
37
38#include <err.h>
39#include <stdlib.h>
40#include <stdio.h>
41#include <string.h>
42#include <unistd.h>
43#include <sys/pciio.h>
44
45#include "pathnames.h"
46#include "vendors.h"
47
48static void list_devs(int vendors);
49static void list_vendor(int vendor, int device);
50static void readit(const char *, const char *, int);
51static void writeit(const char *, const char *, const char *, int);
52static void chkattached(const char *, int);
53
54static int exitstatus = 0;
55
56static void
57usage()
58{
59	fprintf(stderr, "%s\n%s\n%s\n%s\n",
60		"usage: pciconf -l [-v]",
61		"       pciconf -a sel",
62		"       pciconf -r [-b | -h] sel addr",
63		"       pciconf -w [-b | -h] sel addr [value]");
64	exit (1);
65}
66
67int
68main(int argc, char **argv)
69{
70	int c;
71	int listmode, readmode, writemode, attachedmode, vendors;
72	int byte, isshort;
73
74	listmode = readmode = writemode = attachedmode = vendors = byte = isshort = 0;
75
76	while ((c = getopt(argc, argv, "alrwbhv")) != -1) {
77		switch(c) {
78		case 'a':
79			attachedmode = 1;
80			break;
81
82		case 'l':
83			listmode = 1;
84			break;
85
86		case 'r':
87			readmode = 1;
88			break;
89
90		case 'w':
91			writemode = 1;
92			break;
93
94		case 'b':
95			byte = 1;
96			break;
97
98		case 'h':
99			isshort = 1;
100			break;
101
102		case 'v':
103			vendors = 1;
104			break;
105
106		default:
107			usage();
108		}
109	}
110
111	if ((listmode && optind != argc)
112	    || (writemode && optind + 3 != argc)
113	    || (readmode && optind + 2 != argc)
114	    || (attachedmode && optind + 1 != argc))
115		usage();
116
117	if (listmode) {
118		list_devs(vendors);
119	} else if(attachedmode) {
120		chkattached(argv[optind],
121		       byte ? 1 : isshort ? 2 : 4);
122	} else if(readmode) {
123		readit(argv[optind], argv[optind + 1],
124		       byte ? 1 : isshort ? 2 : 4);
125	} else if(writemode) {
126		writeit(argv[optind], argv[optind + 1], argv[optind + 2],
127		       byte ? 1 : isshort ? 2 : 4);
128	} else {
129 		usage();
130	}
131
132	return exitstatus;
133}
134
135static void
136list_devs(int vendors)
137{
138	int fd;
139	struct pci_conf_io pc;
140	struct pci_conf conf[255], *p;
141	int none_count = 0;
142
143	fd = open(_PATH_DEVPCI, O_RDWR, 0);
144	if (fd < 0)
145		err(1, "%s", _PATH_DEVPCI);
146
147	bzero(&pc, sizeof(struct pci_conf_io));
148	pc.match_buf_len = sizeof(conf);
149	pc.matches = conf;
150
151	do {
152		if (ioctl(fd, PCIOCGETCONF, &pc) == -1)
153			err(1, "ioctl(PCIOCGETCONF)");
154
155		/*
156		 * 255 entries should be more than enough for most people,
157		 * but if someone has more devices, and then changes things
158		 * around between ioctls, we'll do the cheezy thing and
159		 * just bail.  The alternative would be to go back to the
160		 * beginning of the list, and print things twice, which may
161		 * not be desireable.
162		 */
163		if (pc.status == PCI_GETCONF_LIST_CHANGED) {
164			warnx("PCI device list changed, please try again");
165			exitstatus = 1;
166			close(fd);
167			return;
168		} else if (pc.status ==  PCI_GETCONF_ERROR) {
169			warnx("error returned from PCIOCGETCONF ioctl");
170			exitstatus = 1;
171			close(fd);
172			return;
173		}
174		for (p = conf; p < &conf[pc.num_matches]; p++) {
175
176			printf("%s%d@pci%d:%d:%d:\tclass=0x%06x card=0x%08x "
177			       "chip=0x%08x rev=0x%02x hdr=0x%02x\n",
178			       (p->pd_name && *p->pd_name) ? p->pd_name :
179			       "none",
180			       (p->pd_name && *p->pd_name) ? (int)p->pd_unit :
181			       none_count++,
182			       p->pc_sel.pc_bus, p->pc_sel.pc_dev,
183			       p->pc_sel.pc_func, (p->pc_class << 16) |
184			       (p->pc_subclass << 8) | p->pc_progif,
185			       (p->pc_subdevice << 16) | p->pc_subvendor,
186			       (p->pc_device << 16) | p->pc_vendor,
187			       p->pc_revid, p->pc_hdr);
188			if (vendors)
189				list_vendor(p->pc_vendor, p->pc_device);
190		}
191	} while (pc.status == PCI_GETCONF_MORE_DEVS);
192
193	close(fd);
194}
195
196static void
197list_vendor(int vendor, int device)
198{
199	struct pci_vendor_information *pv;
200	struct pci_device_information *pd;
201
202	for (pv = pci_vendor_information; pv->desc != NULL; pv++)
203		if (pv->id == vendor)
204			break;
205	if (pv->desc != NULL) {
206	    printf("    <%s>,", pv->desc);
207	} else {
208	    printf("    <unknown vendor 0x%04x>,", vendor);
209	}
210	for (pd = pv->devices; (pd != NULL) && (pd->desc != NULL); pd++)
211		if (pd->id == device)
212			break;
213	if ((pd != NULL) && (pd->desc != NULL)) {
214		printf("<%s>\n", pd->desc);
215	} else {
216		printf("<unknown device 0x%04x>\n", device);
217	}
218}
219
220static struct pcisel
221getsel(const char *str)
222{
223	char *ep = (char*) str;
224	struct pcisel sel;
225
226	if (strncmp(ep, "pci", 3) == 0) {
227		ep += 3;
228		sel.pc_bus = strtoul(ep, &ep, 0);
229		if (!ep || *ep++ != ':')
230			errx(1, "cannot parse selector %s", str);
231		sel.pc_dev = strtoul(ep, &ep, 0);
232		if (!ep || *ep != ':') {
233			sel.pc_func = 0;
234		} else {
235			ep++;
236			sel.pc_func = strtoul(ep, &ep, 0);
237		}
238	}
239	if (*ep == ':')
240		ep++;
241	if (*ep || ep == str)
242		errx(1, "cannot parse selector %s", str);
243	return sel;
244}
245
246static void
247readit(const char *name, const char *reg, int width)
248{
249	int fd;
250	struct pci_io pi;
251
252	pi.pi_sel = getsel(name);
253	pi.pi_reg = strtoul(reg, (char **)0, 0); /* XXX error check */
254	pi.pi_width = width;
255
256	fd = open(_PATH_DEVPCI, O_RDWR, 0);
257	if (fd < 0)
258		err(1, "%s", _PATH_DEVPCI);
259
260	if (ioctl(fd, PCIOCREAD, &pi) < 0)
261		err(1, "ioctl(PCIOCREAD)");
262
263	printf("0x%08x\n", pi.pi_data);
264}
265
266static void
267writeit(const char *name, const char *reg, const char *data, int width)
268{
269	int fd;
270	struct pci_io pi;
271
272	pi.pi_sel = getsel(name);
273	pi.pi_reg = strtoul(reg, (char **)0, 0); /* XXX error check */
274	pi.pi_width = width;
275	pi.pi_data = strtoul(data, (char **)0, 0); /* XXX error check */
276
277	fd = open(_PATH_DEVPCI, O_RDWR, 0);
278	if (fd < 0)
279		err(1, "%s", _PATH_DEVPCI);
280
281	if (ioctl(fd, PCIOCWRITE, &pi) < 0)
282		err(1, "ioctl(PCIOCWRITE)");
283}
284
285static void
286chkattached (const char *name, int width)
287{
288	int fd;
289	struct pci_io pi;
290
291	pi.pi_sel = getsel(name);
292	pi.pi_reg = 0;
293	pi.pi_width = width;
294	pi.pi_data = 0;
295
296	fd = open(_PATH_DEVPCI, O_RDWR, 0);
297	if (fd < 0)
298		err(1, "%s", _PATH_DEVPCI);
299
300	if (ioctl(fd, PCIOCATTACHED, &pi) < 0)
301		err(1, "ioctl(PCIOCATTACHED)");
302
303	exitstatus = pi.pi_data ? 0 : 2; /* exit(2), if NOT attached */
304	printf("%s: %s%s\n", name, pi.pi_data == 0 ? "not " : "", "attached");
305}
306