1 /* $NetBSD: ata_raid_promise.c,v 1.3 2003/12/14 05:37:25 thorpej Exp $ */
2
3 /*-
4 * Copyright (c) 2000,2001,2002 Søren Schmidt <sos@FreeBSD.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer,
12 * without modification, immediately at the beginning of the file.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. The name of the author may not be used to endorse or promote products
17 * derived from this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 /*
32 * Support for parsing Promise ATA RAID controller configuration blocks.
33 *
34 * Adapted to NetBSD by Jason R. Thorpe of Wasabi Systems, Inc.
35 */
36
37 #include <sys/cdefs.h>
38 __KERNEL_RCSID(0, "$NetBSD: ata_raid_promise.c,v 1.3 2003/12/14 05:37:25 thorpej Exp $");
39
40 #include <sys/param.h>
41 #include <sys/buf.h>
42 #include <sys/conf.h>
43 #include <sys/device.h>
44 #include <sys/disk.h>
45 #include <sys/disklabel.h>
46 #include <sys/fcntl.h>
47 #include <sys/malloc.h>
48 #include <sys/vnode.h>
49
50 #include <miscfs/specfs/specdev.h>
51
52 #include <dev/ata/atareg.h>
53 #include <dev/ata/atavar.h>
54 #include <dev/ata/wdvar.h>
55
56 #include <dev/ata/ata_raidreg.h>
57 #include <dev/ata/ata_raidvar.h>
58
59 #ifdef ATA_RAID_DEBUG
60 #define DPRINTF(x) printf x
61 #else
62 #define DPRINTF(x) /* nothing */
63 #endif
64
65 int
66 ata_raid_read_config_promise(struct wd_softc *sc)
67 {
68 struct promise_raid_conf *info;
69 struct vnode *vp;
70 int bmajor, error, count;
71 u_int disk;
72 dev_t dev;
73 uint32_t cksum, *ckptr;
74 struct ataraid_array_info *aai;
75 struct ataraid_disk_info *adi;
76
77 info = malloc(sizeof(*info), M_DEVBUF, M_WAITOK);
78
79 bmajor = devsw_name2blk(sc->sc_dev.dv_xname, NULL, 0);
80
81 /* Get a vnode for the raw partition of this disk. */
82 dev = MAKEDISKDEV(bmajor, sc->sc_dev.dv_unit, RAW_PART);
83 error = bdevvp(dev, &vp);
84 if (error)
85 goto out;
86
87 error = VOP_OPEN(vp, FREAD, NOCRED, 0);
88 if (error) {
89 vput(vp);
90 goto out;
91 }
92
93 error = ata_raid_config_block_rw(vp, PR_LBA(sc), info,
94 sizeof(*info), B_READ);
95 vput(vp);
96 if (error) {
97 printf("%s: error %d reading Promise config block\n",
98 sc->sc_dev.dv_xname, error);
99 goto out;
100 }
101
102 /* Check the signature. */
103 if (strncmp(info->promise_id, PR_MAGIC, sizeof(PR_MAGIC)) != 0) {
104 DPRINTF(("%s: Promise signature check failed\n",
105 sc->sc_dev.dv_xname));
106 error = ESRCH;
107 goto out;
108 }
109
110 /* Verify the checksum. */
111 for (cksum = 0, ckptr = (uint32_t *) info, count = 0; count < 511;
112 count++)
113 cksum += *ckptr++;
114 if (cksum != *ckptr) {
115 DPRINTF(("%s: Promise checksum failed\n", sc->sc_dev.dv_xname));
116 error = ESRCH;
117 goto out;
118 }
119
120 if (info->raid.integrity != PR_I_VALID) {
121 DPRINTF(("%s: Promise config block marked invalid\n",
122 sc->sc_dev.dv_xname));
123 error = ESRCH;
124 goto out;
125 }
126
127 /*
128 * Lookup or allocate a new array info structure for
129 * this array.
130 */
131 aai = ata_raid_get_array_info(ATA_RAID_TYPE_PROMISE,
132 info->raid.array_number);
133
134 if (info->raid.generation == 0 ||
135 info->raid.generation > aai->aai_generation) {
136 aai->aai_generation = info->raid.generation;
137 /* aai_type and aai_arrayno filled in already */
138 if ((info->raid.status &
139 (PR_S_VALID | PR_S_ONLINE | PR_S_INITED | PR_S_READY)) ==
140 (PR_S_VALID | PR_S_ONLINE | PR_S_INITED | PR_S_READY)) {
141 aai->aai_status |= AAI_S_READY;
142 if (info->raid.status & PR_S_DEGRADED)
143 aai->aai_status |= AAI_S_DEGRADED;
144 } else
145 aai->aai_status &= ~AAI_S_READY;
146
147 switch (info->raid.type) {
148 case PR_T_RAID0:
149 aai->aai_level = AAI_L_RAID0;
150 break;
151
152 case PR_T_RAID1:
153 aai->aai_level = AAI_L_RAID1;
154 if (info->raid.array_width > 1)
155 aai->aai_level |= AAI_L_RAID0;
156 break;
157
158 case PR_T_SPAN:
159 aai->aai_level = AAI_L_SPAN;
160 break;
161
162 default:
163 printf("%s: unknown Promise RAID type 0x%02x\n",
164 sc->sc_dev.dv_xname, info->raid.type);
165 error = EINVAL;
166 goto out;
167 }
168
169 aai->aai_interleave = 1U << info->raid.stripe_shift;
170 aai->aai_width = info->raid.array_width;
171 aai->aai_ndisks = info->raid.total_disks;
172 aai->aai_heads = info->raid.heads + 1;
173 aai->aai_sectors = info->raid.sectors;
174 aai->aai_cylinders = info->raid.cylinders + 1;
175 aai->aai_capacity = info->raid.total_sectors;
176 aai->aai_offset = 0;
177 aai->aai_reserved = 63;
178
179 for (disk = 0; disk < aai->aai_ndisks; disk++) {
180 adi = &aai->aai_disks[disk];
181 adi->adi_status = 0;
182 if (info->raid.disk[disk].flags & PR_F_ONLINE)
183 adi->adi_status |= ADI_S_ONLINE;
184 if (info->raid.disk[disk].flags & PR_F_ASSIGNED)
185 adi->adi_status |= ADI_S_ASSIGNED;
186 if (info->raid.disk[disk].flags & PR_F_SPARE) {
187 adi->adi_status &= ~ADI_S_ONLINE;
188 adi->adi_status |= ADI_S_SPARE;
189 }
190 if (info->raid.disk[disk].flags &
191 (PR_F_REDIR | PR_F_DOWN))
192 adi->adi_status &= ~ADI_S_ONLINE;
193 }
194 }
195 adi = &aai->aai_disks[info->raid.disk_number];
196 if (adi->adi_status) {
197 adi->adi_dev = &sc->sc_dev;
198 adi->adi_sectors = info->raid.disk_sectors;
199 adi->adi_compsize = sc->sc_capacity - aai->aai_reserved;
200 }
201
202 error = 0;
203
204 out:
205 free(info, M_DEVBUF);
206 return (error);
207 }
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