sys/dev/scsipi/scsi_base.c

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