The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/dev/scsipi/scsi_base.c

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    1 /*      $NetBSD: scsi_base.c,v 1.87 2006/11/16 01:33:26 christos 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 1.87 2006/11/16 01:33:26 christos 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 cmd;
   65 
   66         memset(&cmd, 0, sizeof(cmd));
   67         cmd.opcode = SCSI_CHANGE_DEFINITION;
   68         cmd.how = SC_SCSI_2;
   69 
   70         return (scsipi_command(periph, (void *)&cmd, sizeof(cmd), 0, 0,
   71             SCSIPIRETRIES, 100000, NULL, flags));
   72 }
   73 
   74 /*
   75  * ask the scsi driver to perform a command for us.
   76  * tell it where to read/write the data, and how
   77  * long the data is supposed to be. If we have  a buf
   78  * to associate with the transfer, we need that too.
   79  */
   80 void
   81 scsi_scsipi_cmd(struct scsipi_xfer *xs)
   82 {
   83         struct scsipi_periph *periph = xs->xs_periph;
   84 
   85         SC_DEBUG(periph, SCSIPI_DB2, ("scsi_scsipi_cmd\n"));
   86 
   87         /*
   88          * Set the LUN in the CDB if we have an older device.  We also
   89          * set it for more modern SCSI-2 devices "just in case".
   90          */
   91         if (periph->periph_version <= 2)
   92                 xs->cmd->bytes[0] |=
   93                     ((periph->periph_lun << SCSI_CMD_LUN_SHIFT) &
   94                         SCSI_CMD_LUN_MASK);
   95 }
   96 
   97 /*
   98  * Utility routines often used in SCSI stuff
   99  */
  100 
  101 /*
  102  * Print out the periph's address info.
  103  */
  104 void
  105 scsi_print_addr(struct scsipi_periph *periph)
  106 {
  107         struct scsipi_channel *chan = periph->periph_channel;
  108         struct scsipi_adapter *adapt = chan->chan_adapter;
  109 
  110         printf("%s(%s:%d:%d:%d): ", periph->periph_dev != NULL ?
  111             periph->periph_dev->dv_xname : "probe",
  112             adapt->adapt_dev->dv_xname,
  113             chan->chan_channel, periph->periph_target,
  114             periph->periph_lun);
  115 }
  116 
  117 /*
  118  * Kill off all pending xfers for a periph.
  119  *
  120  * Must be called at splbio().
  121  */
  122 void
  123 scsi_kill_pending(struct scsipi_periph *periph)
  124 {
  125 }

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