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scsi_base.c revision 1.87.48.1 
      1 /*	$NetBSD: scsi_base.c,v 1.87.48.1 2008/06/02 13:23:50 mjf Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1998, 2004 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Charles M. Hannum.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 __KERNEL_RCSID(0, "$NetBSD: scsi_base.c,v 1.87.48.1 2008/06/02 13:23:50 mjf Exp $");
     34 
     35 #include <sys/param.h>
     36 #include <sys/systm.h>
     37 #include <sys/kernel.h>
     38 #include <sys/buf.h>
     39 #include <sys/uio.h>
     40 #include <sys/malloc.h>
     41 #include <sys/errno.h>
     42 #include <sys/device.h>
     43 #include <sys/proc.h>
     44 
     45 #include <dev/scsipi/scsipi_all.h>
     46 #include <dev/scsipi/scsi_all.h>
     47 #include <dev/scsipi/scsi_disk.h>
     48 #include <dev/scsipi/scsiconf.h>
     49 #include <dev/scsipi/scsipi_base.h>
     50 
     51 /*
     52  * Do a scsi operation, asking a device to run as SCSI-II if it can.
     53  */
     54 int
     55 scsi_change_def(struct scsipi_periph *periph, int flags)
     56 {
     57 	struct scsi_changedef cmd;
     58 
     59 	memset(&cmd, 0, sizeof(cmd));
     60 	cmd.opcode = SCSI_CHANGE_DEFINITION;
     61 	cmd.how = SC_SCSI_2;
     62 
     63 	return (scsipi_command(periph, (void *)&cmd, sizeof(cmd), 0, 0,
     64 	    SCSIPIRETRIES, 100000, NULL, flags));
     65 }
     66 
     67 /*
     68  * ask the scsi driver to perform a command for us.
     69  * tell it where to read/write the data, and how
     70  * long the data is supposed to be. If we have  a buf
     71  * to associate with the transfer, we need that too.
     72  */
     73 void
     74 scsi_scsipi_cmd(struct scsipi_xfer *xs)
     75 {
     76 	struct scsipi_periph *periph = xs->xs_periph;
     77 
     78 	SC_DEBUG(periph, SCSIPI_DB2, ("scsi_scsipi_cmd\n"));
     79 
     80 	/*
     81 	 * Set the LUN in the CDB if we have an older device.  We also
     82 	 * set it for more modern SCSI-2 devices "just in case".
     83 	 */
     84 	if (periph->periph_version <= 2)
     85 		xs->cmd->bytes[0] |=
     86 		    ((periph->periph_lun << SCSI_CMD_LUN_SHIFT) &
     87 			SCSI_CMD_LUN_MASK);
     88 }
     89 
     90 /*
     91  * Utility routines often used in SCSI stuff
     92  */
     93 
     94 /*
     95  * Print out the periph's address info.
     96  */
     97 void
     98 scsi_print_addr(struct scsipi_periph *periph)
     99 {
    100 	struct scsipi_channel *chan = periph->periph_channel;
    101 	struct scsipi_adapter *adapt = chan->chan_adapter;
    102 
    103 	printf("%s(%s:%d:%d:%d): ", periph->periph_dev != NULL ?
    104 	    device_xname(periph->periph_dev) : "probe",
    105 	    device_xname(adapt->adapt_dev),
    106 	    chan->chan_channel, periph->periph_target,
    107 	    periph->periph_lun);
    108 }
    109 
    110 /*
    111  * Kill off all pending xfers for a periph.
    112  *
    113  * Must be called at splbio().
    114  */
    115 void
    116 scsi_kill_pending(struct scsipi_periph *periph)
    117 {
    118 }
    119