NetBSD/sys/dev/scsipi/scsi_base.c

199 lines
5.6 KiB
C

/* $NetBSD: scsi_base.c,v 1.73 2000/04/03 03:37:33 enami Exp $ */
/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Charles M. Hannum.
*
* 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 NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
#include <sys/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/buf.h>
#include <sys/uio.h>
#include <sys/malloc.h>
#include <sys/errno.h>
#include <sys/device.h>
#include <sys/proc.h>
#include <dev/scsipi/scsipi_all.h>
#include <dev/scsipi/scsi_all.h>
#include <dev/scsipi/scsi_disk.h>
#include <dev/scsipi/scsiconf.h>
#include <dev/scsipi/scsipi_base.h>
/*
* Do a scsi operation, asking a device to run as SCSI-II if it can.
*/
int
scsi_change_def(sc_link, flags)
struct scsipi_link *sc_link;
int flags;
{
struct scsi_changedef scsipi_cmd;
bzero(&scsipi_cmd, sizeof(scsipi_cmd));
scsipi_cmd.opcode = SCSI_CHANGE_DEFINITION;
scsipi_cmd.how = SC_SCSI_2;
return (scsipi_command(sc_link,
(struct scsipi_generic *) &scsipi_cmd, sizeof(scsipi_cmd),
0, 0, SCSIPIRETRIES, 100000, NULL, flags));
}
/*
* ask the scsi driver to perform a command for us.
* tell it where to read/write the data, and how
* long the data is supposed to be. If we have a buf
* to associate with the transfer, we need that too.
*/
int
scsi_scsipi_cmd(sc_link, scsipi_cmd, cmdlen, data_addr, datalen,
retries, timeout, bp, flags)
struct scsipi_link *sc_link;
struct scsipi_generic *scsipi_cmd;
int cmdlen;
u_char *data_addr;
int datalen;
int retries;
int timeout;
struct buf *bp;
int flags;
{
struct scsipi_xfer *xs;
int error, s;
SC_DEBUG(sc_link, SDEV_DB2, ("scsi_scsipi_cmd\n"));
#ifdef DIAGNOSTIC
if (bp != NULL && (flags & XS_CTL_ASYNC) == 0)
panic("scsi_scsipi_cmd: buffer without async");
#endif
if ((xs = scsipi_make_xs(sc_link, scsipi_cmd, cmdlen, data_addr,
datalen, retries, timeout, bp, flags)) == NULL) {
if (bp != NULL) {
s = splbio();
bp->b_flags |= B_ERROR;
bp->b_error = ENOMEM;
biodone(bp);
splx(s);
}
return (ENOMEM);
}
/*
* Set the LUN in the CDB if we have an older device. We also
* set it for more modern SCSI-II devices "just in case".
*/
if ((sc_link->scsipi_scsi.scsi_version & SID_ANSII) <= 2)
xs->cmd->bytes[0] |=
((sc_link->scsipi_scsi.lun << SCSI_CMD_LUN_SHIFT) &
SCSI_CMD_LUN_MASK);
if ((error = scsipi_execute_xs(xs)) == EJUSTRETURN)
return (0);
/*
* we have finished with the xfer stuct, free it and
* check if anyone else needs to be started up.
*/
s = splbio();
scsipi_free_xs(xs, flags);
splx(s);
return (error);
}
/*
* Utility routines often used in SCSI stuff
*/
/*
* Print out the scsi_link structure's address info.
*/
void
scsi_print_addr(sc_link)
struct scsipi_link *sc_link;
{
printf("%s(%s:%d:%d): ",
sc_link->device_softc ?
((struct device *)sc_link->device_softc)->dv_xname : "probe",
((struct device *)sc_link->adapter_softc)->dv_xname,
sc_link->scsipi_scsi.target, sc_link->scsipi_scsi.lun);
}
/*
* Kill off all pending xfers for a scsipi_link.
*
* Must be called at splbio().
*/
void
scsi_kill_pending(sc_link)
struct scsipi_link *sc_link;
{
struct scsipi_xfer *xs, *xs_next;
/*
* Note that the scsipi_done frees a xfer only if it is
* an asynchronous transaction.
*/
for (xs = TAILQ_FIRST(&sc_link->pending_xfers); xs != NULL;
xs = xs_next) {
xs_next = TAILQ_NEXT(xs, device_q);
xs->xs_status |= XS_STS_DONE;
xs->error = XS_DRIVER_STUFFUP;
scsipi_done(xs);
}
}
int
scsiprint(aux, pnp)
void *aux;
const char *pnp;
{
struct scsipi_link *l = aux;
/* only "scsibus"es can attach to "scsi"s; easy. */
if (pnp)
printf("scsibus at %s", pnp);
/* don't print channel if the controller says there can be only one. */
if (l->scsipi_scsi.channel != SCSI_CHANNEL_ONLY_ONE)
printf(" channel %d", l->scsipi_scsi.channel);
return (UNCONF);
}