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 1.89 2008/04/28 20:23:57 martin 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 1.89 2008/04/28 20:23:57 martin 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 }

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