218 lines
6.0 KiB
C
218 lines
6.0 KiB
C
/*
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* Copyright (C) 1995, HD Associates, Inc.
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* PO Box 276
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* Pepperell, MA 01463
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* 508 433 5266
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* dufault@hda.com
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*
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* This code is contributed to the University of California at Berkeley:
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT 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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* $Id: scsi_driver.c,v 1.9 1995/05/03 18:09:11 dufault Exp $
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*
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*/
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#include <sys/types.h>
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#include <sys/errno.h>
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/buf.h>
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#include <sys/devconf.h>
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#include <sys/malloc.h>
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#include <sys/fcntl.h>
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#include <machine/cpu.h> /* XXX For bootverbose (funny place) */
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#include <scsi/scsi_all.h>
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#include <scsi/scsiconf.h>
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#include <scsi/scsi_driver.h>
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#define GETUNIT(DEVICE, DEV) \
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((DEVICE)->getunit) ? (*(DEVICE)->getunit)((DEV)) : minor((DEV))
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int
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scsi_goaway(struct kern_devconf *kdc, int force) /* XXX should do a lot more */
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{
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dev_detach(kdc);
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FREE(kdc, M_TEMP);
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return 0;
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}
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/* scsi_device_attach: Attach a SCSI device. This routine will
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* print out the device address, what it is, then call the type
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* attach function and when that returns print a newline. If the
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* type attach will make LOT's of noise it should print a leading
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* newline and then the address using sc_print_addr. See "sd.c".
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*/
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int scsi_device_attach(struct scsi_link *sc_link)
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{
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errval errcode;
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dev_t dev;
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struct scsi_device *device = sc_link->device;
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if (bootverbose)
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sc_link->flags |= SDEV_BOOTVERBOSE;
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SC_DEBUG(sc_link, SDEV_DB2,
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("%s%dattach: ", device->name, sc_link->dev_unit));
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sc_print_start(sc_link);
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printf("%s ", device->desc);
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dev = scsi_dev_lookup(device->open);
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sc_link->dev = (device->setunit ?
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(*device->setunit)(dev, sc_link->dev_unit) :
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makedev(major(dev), sc_link->dev_unit) );
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errcode = (device->attach) ? (*(device->attach))(sc_link) : 0;
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sc_print_finish();
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printf("\n");
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if (errcode == 0)
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sc_link->flags |= device->link_flags;
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return errcode;
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}
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int
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scsi_open(dev_t dev, int flags, int fmt, struct proc *p,
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struct scsi_device *device)
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{
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errval errcode;
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u_int32 unit;
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struct scsi_link *sc_link;
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if (device == 0)
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return ENXIO;
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unit = GETUNIT(device, dev);
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sc_link = SCSI_LINK(device, unit);
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/*
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* Check the unit is legal
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*/
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if (sc_link == 0 || sc_link->sd == 0)
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return ENXIO;
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/* If it is a "once only" device that is already open return EBUSY.
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*/
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if ((sc_link->flags & SDEV_ONCE_ONLY) && (sc_link->flags & SDEV_IS_OPEN))
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return EBUSY;
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/* For the control device (user ioctl's only) don't call the open
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* entry.
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*/
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if (SCSI_CONTROL(dev) || (device->dev_open == 0))
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errcode = 0;
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else
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errcode = (*device->dev_open)(dev, flags, fmt, p, sc_link);
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sc_link->flags |= SDEV_IS_OPEN;
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SC_DEBUG(sc_link, SDEV_DB1, ("%sopen: dev=0x%lx (unit %ld) result %d\n",
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device->name, dev, unit, errcode));
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return errcode;
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}
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int
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scsi_close(dev_t dev, int flags, int fmt, struct proc *p,
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struct scsi_device *device)
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{
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errval errcode;
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struct scsi_link *sc_link = SCSI_LINK(device, GETUNIT(device, dev));
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SC_DEBUG(sc_link, SDEV_DB1, ("%sclose: Closing device\n", device->name));
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if (SCSI_CONTROL(dev) || (device->dev_close == 0))
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errcode = 0;
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else
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errcode = (*device->dev_close)(dev, flags, fmt, p, sc_link);
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sc_link->flags &= ~SDEV_IS_OPEN;
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return errcode;
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}
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int
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scsi_ioctl(dev_t dev, u_int32 cmd, caddr_t arg, int flags, struct proc *p,
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struct scsi_device *device)
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{
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errval errcode;
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struct scsi_link *sc_link = SCSI_LINK(device, GETUNIT(device, dev));
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if (SCSI_CONTROL(dev) || (device->dev_ioctl == 0))
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errcode = scsi_do_ioctl(dev, cmd, arg, flags, p, sc_link);
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else
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errcode = (*device->dev_ioctl)(dev, cmd, arg, flags, p, sc_link);
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return errcode;
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}
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void
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scsi_minphys(struct buf *bp, struct scsi_device *device)
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{
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struct scsi_link *sc_link = SCSI_LINK(device, GETUNIT(device, bp->b_dev));
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(*sc_link->adapter->scsi_minphys)(bp);
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}
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void
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scsi_strategy(struct buf *bp, struct scsi_device *device)
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{
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u_int32 unit = GETUNIT(device, bp->b_dev);
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struct scsi_link *sc_link = SCSI_LINK(device, unit);
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SC_DEBUG(sc_link, SDEV_DB2, ("\n%sstrategy ", device->name));
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SC_DEBUG(sc_link, SDEV_DB1, ("%ld bytes @ blk%ld\n",
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bp->b_bcount, bp->b_blkno));
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if (SCSI_CONTROL(bp->b_dev) || (device->dev_strategy == 0))
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{
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bp->b_resid = bp->b_bcount;
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bp->b_error = EIO;
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bp->b_flags |= B_ERROR;
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biodone(bp);
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}
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else
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{
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bp->b_resid = 0;
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bp->b_error = 0;
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if (bp->b_bcount == 0)
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biodone(bp);
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else
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{
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(*sc_link->adapter->scsi_minphys)(bp);
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(*device->dev_strategy)(bp, sc_link);
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}
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}
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}
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