157 lines
4.7 KiB
C
157 lines
4.7 KiB
C
/* $NetBSD: scsi_base.c,v 1.68 1999/08/28 22:28:35 thorpej Exp $ */
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/*-
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* Copyright (c) 1998 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Charles M. Hannum.
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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 NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/buf.h>
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#include <sys/uio.h>
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#include <sys/malloc.h>
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#include <sys/errno.h>
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#include <sys/device.h>
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#include <sys/proc.h>
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#include <dev/scsipi/scsipi_all.h>
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#include <dev/scsipi/scsi_all.h>
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#include <dev/scsipi/scsi_disk.h>
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#include <dev/scsipi/scsiconf.h>
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#include <dev/scsipi/scsipi_base.h>
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/*
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* Do a scsi operation, asking a device to run as SCSI-II if it can.
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*/
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int
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scsi_change_def(sc_link, flags)
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struct scsipi_link *sc_link;
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int flags;
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{
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struct scsi_changedef scsipi_cmd;
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bzero(&scsipi_cmd, sizeof(scsipi_cmd));
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scsipi_cmd.opcode = SCSI_CHANGE_DEFINITION;
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scsipi_cmd.how = SC_SCSI_2;
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return (scsipi_command(sc_link,
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(struct scsipi_generic *) &scsipi_cmd, sizeof(scsipi_cmd),
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0, 0, 2, 100000, NULL, flags));
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}
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/*
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* ask the scsi driver to perform a command for us.
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* tell it where to read/write the data, and how
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* long the data is supposed to be. If we have a buf
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* to associate with the transfer, we need that too.
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*/
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int
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scsi_scsipi_cmd(sc_link, scsipi_cmd, cmdlen, data_addr, datalen,
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retries, timeout, bp, flags)
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struct scsipi_link *sc_link;
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struct scsipi_generic *scsipi_cmd;
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int cmdlen;
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u_char *data_addr;
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int datalen;
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int retries;
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int timeout;
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struct buf *bp;
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int flags;
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{
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struct scsipi_xfer *xs;
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int error, s;
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SC_DEBUG(sc_link, SDEV_DB2, ("scsi_scsipi_cmd\n"));
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#ifdef DIAGNOSTIC
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if (bp != 0 && (flags & SCSI_NOSLEEP) == 0)
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panic("scsi_scsipi_cmd: buffer without nosleep");
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#endif
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if ((xs = scsipi_make_xs(sc_link, scsipi_cmd, cmdlen, data_addr,
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datalen, retries, timeout, bp, flags)) == NULL) {
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if (bp != NULL) {
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s = splbio();
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bp->b_flags |= B_ERROR;
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bp->b_error = ENOMEM;
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biodone(bp);
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splx(s);
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}
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return (ENOMEM);
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}
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/*
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* Set the LUN in the CDB if we have an older device. We also
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* set it for more modern SCSI-II devices "just in case".
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*/
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if ((sc_link->scsipi_scsi.scsi_version & SID_ANSII) <= 2)
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xs->cmd->bytes[0] |=
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((sc_link->scsipi_scsi.lun << SCSI_CMD_LUN_SHIFT) &
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SCSI_CMD_LUN_MASK);
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if ((error = scsipi_execute_xs(xs)) == EJUSTRETURN)
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return (0);
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/*
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* we have finished with the xfer stuct, free it and
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* check if anyone else needs to be started up.
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*/
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s = splbio();
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scsipi_free_xs(xs, flags);
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splx(s);
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return (error);
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}
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/*
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* Utility routines often used in SCSI stuff
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*/
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/*
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* Print out the scsi_link structure's address info.
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*/
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void
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scsi_print_addr(sc_link)
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struct scsipi_link *sc_link;
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{
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printf("%s(%s:%d:%d): ",
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sc_link->device_softc ?
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((struct device *)sc_link->device_softc)->dv_xname : "probe",
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((struct device *)sc_link->adapter_softc)->dv_xname,
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sc_link->scsipi_scsi.target, sc_link->scsipi_scsi.lun);
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}
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