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/*
* hardware.c - various hardware probing functionality
*
* Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003 Red Hat, Inc.
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Author(s): Erik Troan <ewt@redhat.com>
* Matt Wilson <msw@redhat.com>
* Michael Fulbright <msf@redhat.com>
* Jeremy Katz <katzj@redhat.com>
*/
#include <errno.h>
#include <fcntl.h>
#include <popt.h>
#include <string.h>
#include <strings.h>
#include <stdlib.h>
#include <unistd.h>
#include <ctype.h>
#include <sys/wait.h>
#include "loader.h"
#include "hardware.h"
#include "log.h"
/* FIXME: for turning off dma */
#include <sys/ioctl.h>
#include <linux/hdreg.h>
#include "../isys/isys.h"
/* boot flags */
extern uint64_t flags;
static int detectHardware() {
int child, rc, status;
int timeout = 0; /* FIXME: commandline option for this */
fprintf(stderr, "detecting hardware...\n");
logMessage(DEBUGLVL, "probing buses");
if (!(child = fork())) {
int fd = open("/dev/tty3", O_RDWR);
dup2(fd, 0);
dup2(fd, 1);
dup2(fd, 2);
close(fd);
rc = execl("/sbin/udevadm", "udevadm", "trigger", NULL);
_exit(1);
}
waitpid(child, &status, 0);
if (!WIFEXITED(status) || (WIFEXITED(status) && WEXITSTATUS(status))) {
rc = 1;
} else {
rc = 0;
}
fprintf(stderr, "waiting for hardware to initialize...\n");
logMessage(DEBUGLVL, "waiting for hardware to initialize");
if (!(child = fork())) {
char *args[] = { "/sbin/udevadm", "settle", NULL, NULL };
int fd = open("/dev/tty3", O_RDWR);
dup2(fd, 0);
dup2(fd, 1);
dup2(fd, 2);
close(fd);
if (timeout) {
if (asprintf(&args[2], "--timeout=%d", timeout) == -1) {
logMessage(CRITICAL, "%s: %d: %m", __func__, __LINE__);
abort();
}
}
rc = execv("/sbin/udevadm", args);
_exit(1);
}
waitpid(child, &status, 0);
if (!WIFEXITED(status) || (WIFEXITED(status) && WEXITSTATUS(status))) {
rc = 1;
} else {
rc = 0;
}
if (rc) {
return LOADER_ERROR;
}
return LOADER_OK;
}
/* this allows us to do an early load of modules specified on the
* command line to allow automating the load order of modules so that
* eg, certain scsi controllers are definitely first.
* FIXME: this syntax is likely to change in a future release
* but is done as a quick hack for the present.
*/
int earlyModuleLoad(int justProbe) {
int fd, len, i;
char buf[1024], *cmdLine;
int argc;
char ** argv;
/* FIXME: reparsing /proc/cmdline to avoid major loader changes.
* should probably be done in loader.c:parseCmdline() like everything
* else
*/
if ((fd = open("/proc/cmdline", O_RDONLY)) < 0) return 1;
len = read(fd, buf, sizeof(buf) - 1);
close(fd);
if (len <= 0) return 1;
buf[len] = '\0';
cmdLine = buf;
if (poptParseArgvString(cmdLine, &argc, (const char ***) &argv))
return 1;
for (i=0; i < argc; i++) {
if (!strncasecmp(argv[i], "driverload=", 11)) {
logMessage(INFO, "loading %s early", argv[i] + 11);
mlLoadModuleSet(argv[i] + 11);
}
}
return 0;
}
int busProbe(int justProbe) {
/* autodetect whatever we can */
if (justProbe)
return 0;
return detectHardware();
}
/* check if the system has been booted with dasd parameters */
/* These parameters define the order in which the DASDs */
/* are visible to Linux. Otherwise load dasd modules probeonly, */
/* then parse proc to find active DASDs */
/* Reload dasd_mod with correct range of DASD ports */
void dasdSetup() {
#if !defined(__s390__) && !defined(__s390x__)
return;
#else
char **dasd_parms;
char *line;
char *parms = NULL, *parms_end;
FILE *fd;
dasd_parms = malloc(sizeof(*dasd_parms) * 2);
dasd_parms[0] = NULL;
dasd_parms[1] = NULL;
fd = fopen ("/tmp/dasd_ports", "r");
if(fd) {
line = (char *)malloc(sizeof(char) * 200);
while (fgets (line, 199, fd) != NULL) {
if((parms = strstr(line, "dasd=")) ||
(parms = strstr(line, "DASD="))) {
strncpy(parms, "dasd", 4);
parms_end = parms;
while(*parms_end && !(isspace(*parms_end))) parms_end++;
*parms_end = '\0';
break;
}
}
fclose(fd);
if (strlen(parms) > 5)
dasd_parms[0] = strdup(parms);
free(line);
}
if(dasd_parms[0]) {
mlLoadModule("dasd_mod", dasd_parms);
mlLoadModuleSet("dasd_diag_mod:dasd_fba_mod:dasd_eckd_mod");
free(dasd_parms);
return;
} else {
dasd_parms[0] = "dasd=autodetect";
mlLoadModule("dasd_mod", dasd_parms);
mlLoadModuleSet("dasd_diag_mod:dasd_fba_mod:dasd_eckd_mod");
free(dasd_parms);
}
#endif
}
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