diff options
Diffstat (limited to 'sys/scsi/su.c')
| -rw-r--r-- | sys/scsi/su.c | 361 |
1 files changed, 0 insertions, 361 deletions
diff --git a/sys/scsi/su.c b/sys/scsi/su.c deleted file mode 100644 index 785e831..0000000 --- a/sys/scsi/su.c +++ /dev/null @@ -1,361 +0,0 @@ -/* su: SCSI Universal. This is a universal SCSI device that - * has a fixed minor number format. This allows you to refer - * to your devices by BUS, ID, LUN instead of st0, st1, ... - * - * This code looks up the underlying device for a given SCSI - * target and uses that driver. - * - *Begin copyright - * - * Copyright (C) 1993, 1994, 1995, HD Associates, Inc. - * PO Box 276 - * Pepperell, MA 01463 - * 508 433 5266 - * dufault@hda.com - * - * This code is contributed to the University of California at Berkeley: - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by the University of - * California, Berkeley and its contributors. - * 4. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - *End copyright - * - * $Id: su.c,v 1.20 1998/07/04 22:30:25 julian Exp $ - * - * Tabstops 4 - * XXX devfs entries for this device should be handled by generic scsiconfig - * Add a bdevsw interface.. ? - */ - -#include <sys/param.h> -#include <sys/systm.h> -#include <sys/conf.h> -#include <sys/stat.h> -#include <sys/buf.h> -#include <sys/kernel.h> -#include <scsi/scsiconf.h> -#define CDEV_MAJOR 18 - -/* These three used by ssc. */ -extern d_open_t suopen; -extern d_close_t suclose; -extern d_ioctl_t suioctl; - -static d_read_t suread; -static d_write_t suwrite; -static d_poll_t supoll; -static d_strategy_t sustrategy; - -static struct cdevsw su_cdevsw = - { suopen, suclose, suread, suwrite, /*18*/ - suioctl, nostop, nullreset, nodevtotty,/* scsi */ - supoll, nommap, sustrategy, "su", NULL, -1 }; - - -/* Build an old style device number (unit encoded in the minor number) - * from a base old one (no flag bits) and a full new one - * (BUS, LUN, TARG in the minor number, and flag bits). - * - * OLDDEV has the major number and device unit only. It was constructed - * at attach time and is stored in the scsi_link structure. - * - * NEWDEV can have whatever in it, but only the old control flags and the - * super bit are present. IT CAN'T HAVE ANY UNIT INFORMATION or you'll - * wind up with the wrong unit. - */ -#define OLD_DEV(NEWDEV, OLDDEV) ((OLDDEV) | ((NEWDEV) & 0x080000FF)) - -/* cnxio: non existent device entries. */ - -static d_open_t nxopen; -static d_close_t nxclose; -static d_read_t nxread; -static d_write_t nxwrite; -static d_ioctl_t nxioctl; -#define nxstop nostop /* one void return is as good as another */ -#define nxreset noreset /* one unused function is as good as another */ -#define nxdevtotty nodevtotty /* one NULL return is as good as another */ -#define nxmmap nommap /* one -1 return is as good as another */ -#define nxstrategy nostrategy /* one NULL value is as good as another */ -static d_dump_t nxdump; -#define nxpsize nopsize /* one NULL value is as good as another */ - -static struct cdevsw cnxio = { - nxopen, - nxclose, - nxread, - nxwrite, - nxioctl, - nxstop, - nxreset, - nxdevtotty, - seltrue, - nxmmap, - nxstrategy, - "NON", - NULL, - -1, - nxdump, - nxpsize, - 0, - 0, - -1 -}; - -/* getsws: Look up the base dev switch for a given "by minor number" style - * device. - */ -static int -getsws(dev_t dev, int type, struct cdevsw **devswpp, dev_t *base) -{ - int ret = 0; - struct scsi_link *scsi_link; - int chr_dev, blk_dev; - - struct cdevsw *devswp; - - int bus = SCSI_BUS(dev), - lun = SCSI_LUN(dev), - id = SCSI_ID(dev); - - /* Try to look up the base device by finding the major number in - * the scsi_link structure: - */ - if ((scsi_link = scsi_link_get(bus, id, lun)) == 0 || - scsi_link->dev == NODEV) - { - ret = ENXIO; - devswp = &cnxio; - chr_dev = NODEV; - blk_dev = NODEV; - } - else - { - int bmaj, cmaj; - - cmaj = major(scsi_link->dev); - devswp = cdevsw[cmaj]; - chr_dev = OLD_DEV(dev, scsi_link->dev); - bmaj = devswp->d_bmaj; - blk_dev = OLD_DEV(dev, makedev(bmaj, minor(scsi_link->dev))); - } - - if (devswp) - *devswpp = devswp; - - if (type == S_IFCHR) - *base = chr_dev; - else - *base = blk_dev; - - return ret; -} - -int -suopen(dev_t dev, int flag, int type, struct proc *p) -{ - struct cdevsw *devswp; - dev_t base; - - if (getsws(dev, type, &devswp, &base)) - { - /* Device not configured? Reprobe then try again. - */ - int bus = SCSI_BUS(dev), lun = SCSI_LUN(dev), id = SCSI_ID(dev); - - if (scsi_probe_bus(bus, id, lun) || getsws(dev, type, &devswp, - &base)) - return ENXIO; - } - - /* There is a properly configured underlying device. - * Synthesize an appropriate device number: - */ - return (*devswp->d_open)(base, flag, type, p); -} - -int -suclose(dev_t dev, int fflag, int type, struct proc *p) -{ - struct cdevsw *devswp; - dev_t base; - - (void)getsws(dev, type, &devswp, &base); - - return (*devswp->d_close)(base, fflag, type, p); -} - -static void -sustrategy(struct buf *bp) -{ - dev_t base; - struct cdevsw *devswp; - dev_t dev = bp->b_dev; - - /* XXX: I have no way of knowing if this was through the - * block or the character entry point. - */ - (void)getsws(dev, S_IFBLK, &devswp, &base); - - bp->b_dev = base; - - (*devswp->d_strategy)(bp); - - bp->b_dev = dev; /* strat needs a dev_t */ -} - -int -suioctl(dev_t dev, u_long cmd, caddr_t data, int fflag, struct proc *p) -{ - struct cdevsw *devswp; - dev_t base; - - /* XXX: I have no way of knowing if this was through the - * block or the character entry point. - */ - (void)getsws(dev, S_IFCHR, &devswp, &base); - - return (*devswp->d_ioctl)(base, cmd, data, fflag, p); -} - -static int -suread(dev_t dev, struct uio *uio, int ioflag) -{ - dev_t base; - struct cdevsw *devswp; - - (void)getsws(dev, S_IFCHR, &devswp, &base); - - return (*devswp->d_read)(base, uio, ioflag); -} - -static int -suwrite(dev_t dev, struct uio *uio, int ioflag) -{ - dev_t base; - struct cdevsw *devswp; - - (void)getsws(dev, S_IFCHR, &devswp, &base); - - return (*devswp->d_write)(base, uio, ioflag); -} - -static int -supoll(dev_t dev, int events, struct proc *p) -{ - dev_t base; - struct cdevsw *devswp; - - (void)getsws(dev, S_IFCHR, &devswp, &base); - - return (*devswp->d_poll)(base, events, p); -} - -static int -nxopen(dev, flags, fmt, p) - dev_t dev; - int flags; - int fmt; - struct proc *p; -{ - - return (ENXIO); -} - -static int -nxclose(dev, flags, fmt, p) - dev_t dev; - int flags; - int fmt; - struct proc *p; -{ - - printf("nxclose(0x%x) called\n", dev); - return (ENXIO); -} - -static int -nxread(dev, uio, ioflag) - dev_t dev; - struct uio *uio; - int ioflag; -{ - - printf("nxread(0x%x) called\n", dev); - return (ENXIO); -} - -static int -nxwrite(dev, uio, ioflag) - dev_t dev; - struct uio *uio; - int ioflag; -{ - - printf("nxwrite(0x%x) called\n", dev); - return (ENXIO); -} - -static int -nxioctl(dev, cmd, data, flags, p) - dev_t dev; - u_long cmd; - caddr_t data; - int flags; - struct proc *p; -{ - - printf("nxioctl(0x%x) called\n", dev); - return (ENXIO); -} - -static int -nxdump(dev) - dev_t dev; -{ - - printf("nxdump(0x%x) called\n", dev); - return (ENXIO); -} - -static su_devsw_installed = 0; - -static void -su_drvinit(void *unused) -{ - dev_t dev; - - if( ! su_devsw_installed ) { - dev = makedev(CDEV_MAJOR, 0); - cdevsw_add(&dev,&su_cdevsw, NULL); - su_devsw_installed = 1; - } -} - -SYSINIT(sudev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,su_drvinit,NULL) - - |
