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1.1 root 1: /* $Id: acb4000.c,v 1.4 2003/10/16 02:34:28 fredette Exp $ */
2:
3: /* scsi/acb4000.c - ACB4000 SCSI disk emulation: */
4:
5: /*
6: * Copyright (c) 2003 Matt Fredette
7: * All rights reserved.
8: *
9: * Redistribution and use in source and binary forms, with or without
10: * modification, are permitted provided that the following conditions
11: * are met:
12: * 1. Redistributions of source code must retain the above copyright
13: * notice, this list of conditions and the following disclaimer.
14: * 2. Redistributions in binary form must reproduce the above copyright
15: * notice, this list of conditions and the following disclaimer in the
16: * documentation and/or other materials provided with the distribution.
17: * 3. All advertising materials mentioning features or use of this software
18: * must display the following acknowledgement:
19: * This product includes software developed by Matt Fredette.
20: * 4. The name of the author may not be used to endorse or promote products
21: * derived from this software without specific prior written permission.
22: *
23: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
24: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
25: * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26: * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
27: * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
28: * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
29: * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
31: * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
32: * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
33: * POSSIBILITY OF SUCH DAMAGE.
34: */
35:
36: #include <tme/common.h>
37: _TME_RCSID("$Id: acb4000.c,v 1.4 2003/10/16 02:34:28 fredette Exp $");
38:
39: /* includes: */
40: #include <tme/scsi/scsi-disk.h>
41:
42: /* macros: */
43:
44: /* types: */
45:
46: /* this is the ACB4000 LUN addresser for LUN-aware devices: */
47: static int
48: _tme_acb4000_address_lun(struct tme_scsi_device *scsi_device)
49: {
50: struct tme_scsi_device_sense *sense;
51: int lun;
52:
53: /* if an IDENTIFY message was sent, use that LUN: */
54: lun = scsi_device->tme_scsi_device_addressed_lun;
55:
56: /* otherwise, get the LUN from bits 5-7 of the second
57: CDB byte: */
58: if (lun < 0) {
59: lun = (scsi_device->tme_scsi_device_cdb[1] >> 5);
60: scsi_device->tme_scsi_device_addressed_lun = lun;
61: }
62:
63: /* if this LUN is not defined, and this isn't a REQUEST SENSE
64: command: */
65: if (!(scsi_device->tme_scsi_device_luns
66: & TME_BIT(lun))
67: && (scsi_device->tme_scsi_device_cdb[0]
68: != TME_SCSI_CDB_REQUEST_SENSE)) {
69:
70: /* the ACB4000 returns a nonextended sense code of 0x25
71: for an undefined LUN: */
72: sense = &scsi_device->tme_scsi_device_sense[lun];
73:
74: /* the error class and error code: */
75: sense->tme_scsi_device_sense_data[0]
76: = 0x25;
77: sense->tme_scsi_device_sense_data[1]
78: = 0;
79: sense->tme_scsi_device_sense_data[2]
80: = 0;
81: sense->tme_scsi_device_sense_data[3]
82: = 0;
83: sense->tme_scsi_device_sense_valid = 4;
84:
85: /* return the CHECK CONDITION status: */
86: tme_scsi_device_target_do_smf(scsi_device,
87: TME_SCSI_STATUS_CHECK_CONDITION,
88: TME_SCSI_MSG_CMD_COMPLETE);
89: return (EINVAL);
90: }
91:
92: return (TME_OK);
93: }
94:
95: /* the ACB4000 doesn't support various commands: */
96: static _TME_SCSI_DEVICE_CDB_DECL(_tme_acb4000_cdb_bad)
97: {
98: int lun;
99: struct tme_scsi_device_sense *sense;
100:
101: /* get the addressed LUN's sense: */
102: lun = scsi_device->tme_scsi_device_addressed_lun;
103: sense = &scsi_device->tme_scsi_device_sense[lun];
104:
105: /* the ACB4000 returns a nonextended sense code of 0x20
106: for an invalid command: */
107:
108: /* the error class and error code: */
109: sense->tme_scsi_device_sense_data[0]
110: = 0x20;
111: sense->tme_scsi_device_sense_data[1]
112: = 0;
113: sense->tme_scsi_device_sense_data[2]
114: = 0;
115: sense->tme_scsi_device_sense_data[3]
116: = 0;
117: sense->tme_scsi_device_sense_valid = 4;
118:
119: /* return the CHECK CONDITION status: */
120: tme_scsi_device_target_do_smf(scsi_device,
121: TME_SCSI_STATUS_CHECK_CONDITION,
122: TME_SCSI_MSG_CMD_COMPLETE);
123: }
124:
125: /* this initializes ACB4000 SCSI disk emulation: */
126: int
127: tme_scsi_disk_acb4000_init(struct tme_scsi_disk *scsi_disk)
128: {
129: struct tme_scsi_device *scsi_device;
130:
131: scsi_device = &scsi_disk->tme_scsi_disk_device;
132:
133: /* ACB4000 boards don't support the INQUIRY command: */
134: TME_SCSI_DEVICE_DO_CDB(scsi_device,
135: TME_SCSI_CDB_INQUIRY,
136: _tme_acb4000_cdb_bad);
137:
138: /* ACB4000 boards don't support extended sense: */
139: scsi_device->tme_scsi_device_sense_no_extended
140: = TRUE;
141:
142: /* ACB4000 boards have a particular LUN addressing behavior: */
143: scsi_device->tme_scsi_device_address_lun
144: = _tme_acb4000_address_lun;
145:
146: return (TME_OK);
147: }
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