1 /* $NetBSD: ata_raid_via.c,v 1.10 2022/03/19 13:51:01 hannken Exp $ */
2
3 /*-
4 * Copyright (c) 2000,2001,2002 S�ren 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 VIA V-RAID ATA RAID controller configuration blocks.
33 *
34 * Adapted to NetBSD by Tim Rightnour (garbled@netbsd.org)
35 */
36
37 #include <sys/cdefs.h>
38 __KERNEL_RCSID(0, "$NetBSD: ata_raid_via.c,v 1.10 2022/03/19 13:51:01 hannken 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/vnode.h>
49 #include <sys/kauth.h>
50
51 #include <miscfs/specfs/specdev.h>
52
53 #include <dev/ata/atareg.h>
54 #include <dev/ata/atavar.h>
55 #include <dev/ata/wdvar.h>
56
57 #include <dev/ata/ata_raidreg.h>
58 #include <dev/ata/ata_raidvar.h>
59
60 #ifdef ATA_RAID_DEBUG
61 #define DPRINTF(x) printf x
62 #else
63 #define DPRINTF(x) /* nothing */
64 #endif
65
66 #ifdef ATA_RAID_DEBUG
67 static const char *
ata_raid_via_type(int type)68 ata_raid_via_type(int type)
69 {
70 static char buffer[16];
71
72 switch (type) {
73 case VIA_T_RAID0: return "RAID0";
74 case VIA_T_RAID1: return "RAID1";
75 case VIA_T_RAID5: return "RAID5";
76 case VIA_T_RAID01: return "RAID0+1";
77 case VIA_T_SPAN: return "SPAN";
78 default:
79 snprintf(buffer, sizeof(buffer), "UNKNOWN 0x%02x", type);
80 return buffer;
81 }
82 }
83
84 static void
ata_raid_via_print_info(struct via_raid_conf * info)85 ata_raid_via_print_info(struct via_raid_conf *info)
86 {
87 int i;
88
89 printf("*************** ATA VIA Metadata ****************\n");
90 printf("magic 0x%02x\n", info->magic);
91 printf("dummy_0 0x%02x\n", info->dummy_0);
92 printf("type %s\n",
93 ata_raid_via_type(info->type & VIA_T_MASK));
94 printf("bootable %d\n", info->type & VIA_T_BOOTABLE);
95 printf("unknown %d\n", info->type & VIA_T_UNKNOWN);
96 printf("disk_index 0x%02x\n", info->disk_index);
97 printf("stripe_layout 0x%02x\n", info->stripe_layout);
98 printf(" stripe_disks %d\n", info->stripe_layout & VIA_L_DISKS);
99 printf(" stripe_sectors %d\n",
100 0x08 << ((info->stripe_layout & VIA_L_MASK) >> VIA_L_SHIFT));
101 printf("disk_sectors %ju\n", info->disk_sectors);
102 printf("disk_id 0x%08x\n", info->disk_id);
103 printf("DISK# disk_id\n");
104 for (i = 0; i < 8; i++) {
105 if (info->disks[i])
106 printf(" %d 0x%08x\n", i, info->disks[i]);
107 }
108 printf("checksum 0x%02x\n", info->checksum);
109 printf("=================================================\n");
110 }
111 #endif
112
113 int
ata_raid_read_config_via(struct wd_softc * sc)114 ata_raid_read_config_via(struct wd_softc *sc)
115 {
116 struct dk_softc *dksc = &sc->sc_dksc;
117 struct via_raid_conf *info;
118 struct atabus_softc *atabus;
119 struct vnode *vp;
120 int bmajor, error;
121 dev_t dev;
122 uint32_t drive;
123 uint8_t checksum, checksum_alt, byte3, *ptr;
124 int count, disk;
125 struct ataraid_array_info *aai;
126 struct ataraid_disk_info *adi;
127
128 info = kmem_zalloc(sizeof(*info), KM_SLEEP);
129
130 bmajor = devsw_name2blk(dksc->sc_xname, NULL, 0);
131
132 /* Get a vnode for the raw partition of this disk. */
133 dev = MAKEDISKDEV(bmajor, device_unit(dksc->sc_dev), RAW_PART);
134 error = bdevvp(dev, &vp);
135 if (error)
136 goto out;
137
138 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
139 error = VOP_OPEN(vp, FREAD, NOCRED);
140 if (error) {
141 vput(vp);
142 goto out;
143 }
144
145 error = ata_raid_config_block_rw(vp, VIA_LBA(sc), info,
146 sizeof(*info), B_READ);
147 VOP_CLOSE(vp, FREAD, NOCRED);
148 vput(vp);
149 if (error) {
150 aprint_error_dev(dksc->sc_dev,
151 "error %d reading VIA V-RAID config block\n", error);
152 goto out;
153 }
154
155 #ifdef ATA_RAID_DEBUG
156 ata_raid_via_print_info(info);
157 printf("MAGIC == 0x%02x\n", info->magic);
158 #endif
159
160 /* Check the signature. */
161 if (info->magic != VIA_MAGIC) {
162 DPRINTF(("%s: VIA V-RAID signature check failed\n",
163 dksc->sc_xname));
164 error = ESRCH;
165 goto out;
166 }
167
168 /* calculate checksum and compare for valid */
169 for (byte3 = 0, checksum = 0, ptr = (uint8_t *)info, count = 0;
170 count < 50; count++)
171 if (count == 3)
172 byte3 = *ptr++;
173 else
174 checksum += *ptr++;
175 checksum_alt = checksum + (byte3 & ~VIA_T_BOOTABLE);
176 checksum += byte3;
177 if (checksum != info->checksum && checksum_alt != info->checksum) {
178 DPRINTF(("%s: VIA V-RAID checksum failed 0x%02x != "
179 "0x%02x or 0x%02x\n", dksc->sc_xname,
180 info->checksum, checksum, checksum_alt));
181 error = ESRCH;
182 goto out;
183 }
184
185 /*
186 * Lookup or allocate a new array info structure for
187 * this array. Use the serial number of disk0 as the array#
188 */
189 aai = ata_raid_get_array_info(ATA_RAID_TYPE_VIA, info->disks[0]);
190
191 aai->aai_status = AAI_S_READY;
192
193 switch (info->type & VIA_T_MASK) {
194 case VIA_T_RAID0:
195 aai->aai_level = AAI_L_RAID0;
196 aai->aai_width = info->stripe_layout & VIA_L_DISKS;
197 aai->aai_capacity = aai->aai_width * info->disk_sectors;
198 break;
199
200 case VIA_T_RAID1:
201 aai->aai_level = AAI_L_RAID1;
202 aai->aai_width = 1;
203 aai->aai_capacity = aai->aai_width * info->disk_sectors;
204 break;
205
206 case VIA_T_RAID5:
207 aai->aai_level = AAI_L_RAID5;
208 aai->aai_width = info->stripe_layout & VIA_L_DISKS;
209 aai->aai_capacity = (aai->aai_width - 1) * info->disk_sectors;
210 break;
211
212 case VIA_T_SPAN:
213 aai->aai_level = AAI_L_SPAN;
214 aai->aai_width = 1;
215 aai->aai_capacity += info->disk_sectors; /* XXX ??? */
216 break;
217
218 default:
219 aprint_error_dev(dksc->sc_dev,
220 "unknown VIA V-RAID type 0x%02x\n", info->type);
221 error = EINVAL;
222 goto out;
223 }
224
225 aai->aai_type = ATA_RAID_TYPE_VIA;
226 for (count = 0, disk = 0; disk < 8; disk++)
227 if (info->disks[disk])
228 count++;
229 aai->aai_interleave =
230 0x08 << ((info->stripe_layout & VIA_L_MASK) >> VIA_L_SHIFT);
231 aai->aai_ndisks = count;
232 aai->aai_heads = 255;
233 aai->aai_sectors = 63;
234 aai->aai_cylinders = aai->aai_capacity / (63 * 255);
235 aai->aai_offset = 0;
236 aai->aai_reserved = 1;
237
238 /* XXX - bogus. RAID1 shouldn't really have an interleave */
239 if (aai->aai_interleave == 0)
240 aai->aai_interleave = aai->aai_capacity;
241
242 atabus = device_private(device_parent(dksc->sc_dev));
243 drive = atabus->sc_chan->ch_channel;
244 if (drive >= aai->aai_ndisks) {
245 aprint_error_dev(dksc->sc_dev,
246 "drive number %d doesn't make sense within %d-disk "
247 "array\n", drive, aai->aai_ndisks);
248 error = EINVAL;
249 goto out;
250 }
251
252 adi = &aai->aai_disks[drive];
253 adi->adi_dev = dksc->sc_dev;
254 adi->adi_status = ADI_S_ONLINE | ADI_S_ASSIGNED;
255 adi->adi_sectors = aai->aai_capacity;
256 adi->adi_compsize = info->disk_sectors;
257
258 error = 0;
259
260 out:
261 kmem_free(info, sizeof(*info));
262 return (error);
263 }
264