1/* $NetBSD: ata_raid_promise.c,v 1.11 2008/03/18 20:46:36 cube 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 1.11 2008/03/18 20:46:36 cube Exp $");
39
40#include <sys/param.h>
41#include <sys/buf.h>
42#include <sys/bufq.h>
43#include <sys/conf.h>
44#include <sys/device.h>
45#include <sys/disk.h>
46#include <sys/disklabel.h>
47#include <sys/fcntl.h>
48#include <sys/malloc.h>
49#include <sys/vnode.h>
50#include <sys/kauth.h>
51
52#include <miscfs/specfs/specdev.h>
53
54#include <dev/ata/atareg.h>
55#include <dev/ata/atavar.h>
56#include <dev/ata/wdvar.h>
57
58#include <dev/ata/ata_raidreg.h>
59#include <dev/ata/ata_raidvar.h>
60
61#ifdef ATA_RAID_DEBUG
62#define DPRINTF(x) printf x
63#else
64#define DPRINTF(x) /* nothing */
65#endif
66
67int
68ata_raid_read_config_promise(struct wd_softc *sc)
69{
70 struct promise_raid_conf *info;
71 struct vnode *vp;
72 int bmajor, error, count;
73 u_int disk;
74 dev_t dev;
75 uint32_t cksum, *ckptr;
76 struct ataraid_array_info *aai;
77 struct ataraid_disk_info *adi;
78
79 info = malloc(sizeof(*info), M_DEVBUF, M_WAITOK);
80
81 bmajor = devsw_name2blk(device_xname(sc->sc_dev), NULL, 0);
82
83 /* Get a vnode for the raw partition of this disk. */
84 dev = MAKEDISKDEV(bmajor, device_unit(sc->sc_dev), RAW_PART);
85 error = bdevvp(dev, &vp);
86 if (error)
87 goto out;
88
89 error = VOP_OPEN(vp, FREAD, NOCRED);
90 if (error) {
91 vput(vp);
92 goto out;
93 }
94
95 error = ata_raid_config_block_rw(vp, PR_LBA(sc), info,
96 sizeof(*info), B_READ);
97 VOP_CLOSE(vp, FREAD, NOCRED);
98 vput(vp);
99 if (error) {
100 aprint_error_dev(sc->sc_dev,
101 "error %d reading Promise config block\n", error);
102 goto out;
103 }
104
105 /* Check the signature. */
106 if (strncmp(info->promise_id, PR_MAGIC, sizeof(PR_MAGIC)) != 0) {
107 DPRINTF(("%s: Promise signature check failed\n",
108 device_xname(sc->sc_dev)));
109 error = ESRCH;
110 goto out;
111 }
112
113 /* Verify the checksum. */
114 for (cksum = 0, ckptr = (uint32_t *) info, count = 0; count < 511;
115 count++)
116 cksum += *ckptr++;
117 if (cksum != *ckptr) {
118 DPRINTF(("%s: Promise checksum failed\n",
119 device_xname(sc->sc_dev)));
120 error = ESRCH;
121 goto out;
122 }
123
124 if (info->raid.integrity != PR_I_VALID) {
125 DPRINTF(("%s: Promise config block marked invalid\n",
126 device_xname(sc->sc_dev)));
127 error = ESRCH;
128 goto out;
129 }
130
131 /*
132 * Lookup or allocate a new array info structure for
133 * this array.
134 */
135 aai = ata_raid_get_array_info(ATA_RAID_TYPE_PROMISE,
136 info->raid.array_number);
137
138 if (info->raid.generation == 0 ||
139 info->raid.generation > aai->aai_generation) {
140 aai->aai_generation = info->raid.generation;
141 /* aai_type and aai_arrayno filled in already */
142 if ((info->raid.status &
143 (PR_S_VALID | PR_S_ONLINE | PR_S_INITED | PR_S_READY)) ==
144 (PR_S_VALID | PR_S_ONLINE | PR_S_INITED | PR_S_READY)) {
145 aai->aai_status |= AAI_S_READY;
146 if (info->raid.status & PR_S_DEGRADED)
147 aai->aai_status |= AAI_S_DEGRADED;
148 } else
149 aai->aai_status &= ~AAI_S_READY;
150
151 switch (info->raid.type) {
152 case PR_T_RAID0:
153 aai->aai_level = AAI_L_RAID0;
154 break;
155
156 case PR_T_RAID1:
157 aai->aai_level = AAI_L_RAID1;
158 if (info->raid.array_width > 1)
159 aai->aai_level |= AAI_L_RAID0;
160 break;
161
162 case PR_T_SPAN:
163 aai->aai_level = AAI_L_SPAN;
164 break;
165
166 default:
167 aprint_error_dev(sc->sc_dev,
168 "unknown Promise RAID type 0x%02x\n",
169 info->raid.type);
170 error = EINVAL;
171 goto out;
172 }
173
174 aai->aai_interleave = 1U << info->raid.stripe_shift;
175 aai->aai_width = info->raid.array_width;
176 aai->aai_ndisks = info->raid.total_disks;
177 aai->aai_heads = info->raid.heads + 1;
178 aai->aai_sectors = info->raid.sectors;
179 aai->aai_cylinders = info->raid.cylinders + 1;
180 aai->aai_capacity = info->raid.total_sectors;
181 aai->aai_offset = 0;
182 aai->aai_reserved = 63;
183
184 for (disk = 0; disk < aai->aai_ndisks; disk++) {
185 adi = &aai->aai_disks[disk];
186 adi->adi_status = 0;
187 if (info->raid.disk[disk].flags & PR_F_ONLINE)
188 adi->adi_status |= ADI_S_ONLINE;
189 if (info->raid.disk[disk].flags & PR_F_ASSIGNED)
190 adi->adi_status |= ADI_S_ASSIGNED;
191 if (info->raid.disk[disk].flags & PR_F_SPARE) {
192 adi->adi_status &= ~ADI_S_ONLINE;
193 adi->adi_status |= ADI_S_SPARE;
194 }
195 if (info->raid.disk[disk].flags &
196 (PR_F_REDIR | PR_F_DOWN))
197 adi->adi_status &= ~ADI_S_ONLINE;
198 }
199 }
200 adi = &aai->aai_disks[info->raid.disk_number];
201 if (adi->adi_status) {
202 adi->adi_dev = sc->sc_dev;
203 adi->adi_sectors = info->raid.disk_sectors;
204 adi->adi_compsize = sc->sc_capacity - aai->aai_reserved;
205 }
206
207 error = 0;
208
209 out:
210 free(info, M_DEVBUF);
211 return (error);
212}
213