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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