274 lines
6.6 KiB
C
274 lines
6.6 KiB
C
/*
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* Copyright 1996 Massachusetts Institute of Technology
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*
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* Permission to use, copy, modify, and distribute this software and
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* its documentation for any purpose and without fee is hereby
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* granted, provided that both the above copyright notice and this
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* permission notice appear in all copies, that both the above
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* copyright notice and this permission notice appear in all
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* supporting documentation, and that the name of M.I.T. not be used
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* in advertising or publicity pertaining to distribution of the
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* software without specific, written prior permission. M.I.T. makes
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* no representations about the suitability of this software for any
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* purpose. It is provided "as is" without express or implied
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* warranty.
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*
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* THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
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* ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
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* SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static const char rcsid[] =
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"$Id: pciconf.c,v 1.5 1997/10/06 11:38:30 charnier Exp $";
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/fcntl.h>
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#include <err.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <pci/pcivar.h>
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#include <pci/pci_ioctl.h>
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#include "pathnames.h"
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static void list_devs(void);
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static void readit(const char *, const char *, int);
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static void writeit(const char *, const char *, const char *, int);
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static void chkattached(const char *, int);
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static exitstatus = 0;
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static void
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usage()
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{
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fprintf(stderr, "%s\n%s\n%s\n%s\n",
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"usage: pciconf -l",
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" pciconf -a sel",
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" pciconf -r [-b | -h] sel addr",
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" pciconf -w [-b | -h] sel addr [value]");
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exit (1);
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}
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int
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main(int argc, char **argv)
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{
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int c;
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int listmode, readmode, writemode, attachedmode;
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int byte, isshort;
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listmode = readmode = writemode = attachedmode = byte = isshort = 0;
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while ((c = getopt(argc, argv, "alrwbh")) != -1) {
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switch(c) {
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case 'a':
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attachedmode = 1;
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break;
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case 'l':
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listmode = 1;
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break;
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case 'r':
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readmode = 1;
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break;
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case 'w':
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writemode = 1;
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break;
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case 'b':
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byte = 1;
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break;
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case 'h':
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isshort = 1;
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break;
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default:
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usage();
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}
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}
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if ((listmode && optind != argc)
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|| (writemode && optind + 3 != argc)
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|| (readmode && optind + 2 != argc)
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|| (attachedmode && optind + 1 != argc))
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usage();
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if (listmode) {
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list_devs();
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} else if(attachedmode) {
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chkattached(argv[optind],
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byte ? 1 : isshort ? 2 : 4);
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} else if(readmode) {
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readit(argv[optind], argv[optind + 1],
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byte ? 1 : isshort ? 2 : 4);
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} else if(writemode) {
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writeit(argv[optind], argv[optind + 1], argv[optind + 2],
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byte ? 1 : isshort ? 2 : 4);
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} else {
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usage();
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}
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return exitstatus;
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}
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static void
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list_devs(void)
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{
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int fd;
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struct pci_conf_io pc;
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struct pci_conf conf[255], *p;
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fd = open(_PATH_DEVPCI, O_RDWR, 0);
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if (fd < 0)
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err(1, "%s", _PATH_DEVPCI);
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bzero(&pc, sizeof(struct pci_conf_io));
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pc.match_buf_len = sizeof(conf);
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pc.matches = conf;
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do {
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if (ioctl(fd, PCIOCGETCONF, &pc) == -1)
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err(1, "ioctl(PCIOCGETCONF)");
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/*
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* 255 entries should be more than enough for most people,
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* but if someone has more devices, and then changes things
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* around between ioctls, we'll do the cheezy thing and
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* just bail. The alternative would be to go back to the
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* beginning of the list, and print things twice, which may
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* not be desireable.
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*/
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if (pc.status == PCI_GETCONF_LIST_CHANGED) {
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warnx("PCI device list changed, please try again");
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exitstatus = 1;
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close(fd);
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return;
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} else if (pc.status == PCI_GETCONF_ERROR) {
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warnx("Error returned from PCIOCGETCONF ioctl");
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exitstatus = 1;
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close(fd);
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return;
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}
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for (p = conf; p < &conf[pc.num_matches]; p++) {
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if ((p->pd_name == NULL) || (*p->pd_name == '\0'))
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continue;
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printf("%s%d@pci%d:%d:%d:\tclass=0x%06x card=0x%08lx "
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"chip=0x%08lx rev=0x%02x hdr=0x%02x\n",
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p->pd_name, p->pd_unit,
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p->pc_sel.pc_bus, p->pc_sel.pc_dev,
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p->pc_sel.pc_func, (p->pc_class << 16) |
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(p->pc_subclass << 8) | p->pc_progif,
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(p->pc_subdevice << 16) | p->pc_subvendor,
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(p->pc_device << 16) | p->pc_vendor,
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p->pc_revid, p->pc_hdr);
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}
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} while (pc.status == PCI_GETCONF_MORE_DEVS);
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close(fd);
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}
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static struct pcisel
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getsel(const char *str)
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{
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char *ep = (char*) str;
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struct pcisel sel;
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if (strncmp(ep, "pci", 3) == 0) {
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ep += 3;
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sel.pc_bus = strtoul(ep, &ep, 0);
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if (!ep || *ep++ != ':')
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errx(1, "cannot parse selector %s", str);
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sel.pc_dev = strtoul(ep, &ep, 0);
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if (!ep || *ep != ':') {
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sel.pc_func = 0;
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} else {
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ep++;
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sel.pc_func = strtoul(ep, &ep, 0);
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}
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}
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if (*ep == ':')
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ep++;
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if (*ep || ep == str)
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errx(1, "cannot parse selector %s", str);
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return sel;
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}
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static void
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readit(const char *name, const char *reg, int width)
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{
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int fd;
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struct pci_io pi;
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pi.pi_sel = getsel(name);
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pi.pi_reg = strtoul(reg, (char **)0, 0); /* XXX error check */
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pi.pi_width = width;
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fd = open(_PATH_DEVPCI, O_RDWR, 0);
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if (fd < 0)
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err(1, "%s", _PATH_DEVPCI);
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if (ioctl(fd, PCIOCREAD, &pi) < 0)
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err(1, "ioctl(PCIOCREAD)");
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printf("0x%08x\n", pi.pi_data);
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}
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static void
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writeit(const char *name, const char *reg, const char *data, int width)
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{
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int fd;
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struct pci_io pi;
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pi.pi_sel = getsel(name);
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pi.pi_reg = strtoul(reg, (char **)0, 0); /* XXX error check */
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pi.pi_width = width;
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pi.pi_data = strtoul(data, (char **)0, 0); /* XXX error check */
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fd = open(_PATH_DEVPCI, O_RDWR, 0);
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if (fd < 0)
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err(1, "%s", _PATH_DEVPCI);
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if (ioctl(fd, PCIOCWRITE, &pi) < 0)
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err(1, "ioctl(PCIOCWRITE)");
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}
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static void
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chkattached (const char *name, int width)
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{
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int fd;
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struct pci_io pi;
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pi.pi_sel = getsel(name);
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pi.pi_reg = 0;
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pi.pi_width = width;
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pi.pi_data = 0;
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fd = open(_PATH_DEVPCI, O_RDWR, 0);
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if (fd < 0)
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err(1, "%s", _PATH_DEVPCI);
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if (ioctl(fd, PCIOCATTACHED, &pi) < 0)
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err(1, "ioctl(PCIOCATTACHED)");
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exitstatus = pi.pi_data ? 0 : 2; /* exit(2), if NOT attached */
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printf("%s: %s%s\n", name, pi.pi_data == 0 ? "not " : "", "attached");
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}
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