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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