xref: /src/sys/dev/scsipi/scsi_base.c

/*	$NetBSD: scsi_base.c,v 1.88 2008/04/05 15:47:01 cegger Exp $	*/

/*-
 * Copyright (c) 1998, 2004 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/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: scsi_base.c,v 1.88 2008/04/05 15:47:01 cegger Exp $");

#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(struct scsipi_periph *periph, int flags)
{
	struct scsi_changedef cmd;

	memset(&cmd, 0, sizeof(cmd));
	cmd.opcode = SCSI_CHANGE_DEFINITION;
	cmd.how = SC_SCSI_2;

	return (scsipi_command(periph, (void *)&cmd, sizeof(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.
 */
void
scsi_scsipi_cmd(struct scsipi_xfer *xs)
{
	struct scsipi_periph *periph = xs->xs_periph;

	SC_DEBUG(periph, SCSIPI_DB2, ("scsi_scsipi_cmd\n"));

	/*
	 * Set the LUN in the CDB if we have an older device.  We also
	 * set it for more modern SCSI-2 devices "just in case".
	 */
	if (periph->periph_version <= 2)
		xs->cmd->bytes[0] |=
		    ((periph->periph_lun << SCSI_CMD_LUN_SHIFT) &
			SCSI_CMD_LUN_MASK);
}

/*
 * Utility routines often used in SCSI stuff
 */

/*
 * Print out the periph's address info.
 */
void
scsi_print_addr(struct scsipi_periph *periph)
{
	struct scsipi_channel *chan = periph->periph_channel;
	struct scsipi_adapter *adapt = chan->chan_adapter;

	printf("%s(%s:%d:%d:%d): ", periph->periph_dev != NULL ?
	    device_xname(periph->periph_dev) : "probe",
	    device_xname(adapt->adapt_dev),
	    chan->chan_channel, periph->periph_target,
	    periph->periph_lun);
}

/*
 * Kill off all pending xfers for a periph.
 *
 * Must be called at splbio().
 */
void
scsi_kill_pending(struct scsipi_periph *periph)
{
}