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scsi_base.c revision 1.82 
      1 /*	$NetBSD: scsi_base.c,v 1.82 2004/09/17 23:30:22 mycroft 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  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 #include <sys/cdefs.h>
     40 __KERNEL_RCSID(0, "$NetBSD: scsi_base.c,v 1.82 2004/09/17 23:30:22 mycroft Exp $");
     41 
     42 #include <sys/param.h>
     43 #include <sys/systm.h>
     44 #include <sys/kernel.h>
     45 #include <sys/buf.h>
     46 #include <sys/uio.h>
     47 #include <sys/malloc.h>
     48 #include <sys/errno.h>
     49 #include <sys/device.h>
     50 #include <sys/proc.h>
     51 
     52 #include <dev/scsipi/scsipi_all.h>
     53 #include <dev/scsipi/scsi_all.h>
     54 #include <dev/scsipi/scsi_disk.h>
     55 #include <dev/scsipi/scsiconf.h>
     56 #include <dev/scsipi/scsipi_base.h>
     57 
     58 /*
     59  * Do a scsi operation, asking a device to run as SCSI-II if it can.
     60  */
     61 int
     62 scsi_change_def(struct scsipi_periph *periph, int flags)
     63 {
     64 	struct scsi_changedef scsipi_cmd;
     65 
     66 	memset(&scsipi_cmd, 0, sizeof(scsipi_cmd));
     67 	scsipi_cmd.opcode = SCSI_CHANGE_DEFINITION;
     68 	scsipi_cmd.how = SC_SCSI_2;
     69 
     70 	return (scsipi_command(periph, NULL,
     71 	    (struct scsipi_generic *) &scsipi_cmd, sizeof(scsipi_cmd),
     72 	    0, 0, SCSIPIRETRIES, 100000, NULL, flags));
     73 }
     74 
     75 /*
     76  * ask the scsi driver to perform a command for us.
     77  * tell it where to read/write the data, and how
     78  * long the data is supposed to be. If we have  a buf
     79  * to associate with the transfer, we need that too.
     80  */
     81 void
     82 scsi_scsipi_cmd(struct scsipi_xfer *xs)
     83 {
     84 	struct scsipi_periph *periph = xs->xs_periph;
     85 
     86 	SC_DEBUG(periph, SCSIPI_DB2, ("scsi_scsipi_cmd\n"));
     87 
     88 	/*
     89 	 * Set the LUN in the CDB if we have an older device.  We also
     90 	 * set it for more modern SCSI-2 devices "just in case".
     91 	 */
     92 	if (periph->periph_version <= 2)
     93 		xs->cmd->bytes[0] |=
     94 		    ((periph->periph_lun << SCSI_CMD_LUN_SHIFT) &
     95 			SCSI_CMD_LUN_MASK);
     96 }
     97 
     98 /*
     99  * Utility routines often used in SCSI stuff
    100  */
    101 
    102 /*
    103  * Print out the periph's address info.
    104  */
    105 void
    106 scsi_print_addr(struct scsipi_periph *periph)
    107 {
    108 	struct scsipi_channel *chan = periph->periph_channel;
    109 	struct scsipi_adapter *adapt = chan->chan_adapter;
    110 
    111 	printf("%s(%s:%d:%d:%d): ", periph->periph_dev != NULL ?
    112 	    periph->periph_dev->dv_xname : "probe",
    113 	    adapt->adapt_dev->dv_xname,
    114 	    chan->chan_channel, periph->periph_target,
    115 	    periph->periph_lun);
    116 }
    117 
    118 /*
    119  * Kill off all pending xfers for a periph.
    120  *
    121  * Must be called at splbio().
    122  */
    123 void
    124 scsi_kill_pending(struct scsipi_periph *periph)
    125 {
    126 }
    127