1 | /* $NetBSD: ata_raid_via.c,v 1.7 2014/03/25 16:19:13 christos 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 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 1.7 2014/03/25 16:19:13 christos 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 | |
67 | #ifdef ATA_RAID_DEBUG |
68 | static const char * |
69 | ata_raid_via_type(int type) |
70 | { |
71 | static char buffer[16]; |
72 | |
73 | switch (type) { |
74 | case VIA_T_RAID0: return "RAID0" ; |
75 | case VIA_T_RAID1: return "RAID1" ; |
76 | case VIA_T_RAID5: return "RAID5" ; |
77 | case VIA_T_RAID01: return "RAID0+1" ; |
78 | case VIA_T_SPAN: return "SPAN" ; |
79 | default: |
80 | snprintf(buffer, sizeof(buffer), "UNKNOWN 0x%02x" , type); |
81 | return buffer; |
82 | } |
83 | } |
84 | |
85 | static void |
86 | ata_raid_via_print_info(struct via_raid_conf *info) |
87 | { |
88 | int i; |
89 | |
90 | printf("*************** ATA VIA Metadata ****************\n" ); |
91 | printf("magic 0x%02x\n" , info->magic); |
92 | printf("dummy_0 0x%02x\n" , info->dummy_0); |
93 | printf("type %s\n" , |
94 | ata_raid_via_type(info->type & VIA_T_MASK)); |
95 | printf("bootable %d\n" , info->type & VIA_T_BOOTABLE); |
96 | printf("unknown %d\n" , info->type & VIA_T_UNKNOWN); |
97 | printf("disk_index 0x%02x\n" , info->disk_index); |
98 | printf("stripe_layout 0x%02x\n" , info->stripe_layout); |
99 | printf(" stripe_disks %d\n" , info->stripe_layout & VIA_L_DISKS); |
100 | printf(" stripe_sectors %d\n" , |
101 | 0x08 << ((info->stripe_layout & VIA_L_MASK) >> VIA_L_SHIFT)); |
102 | printf("disk_sectors %ju\n" , info->disk_sectors); |
103 | printf("disk_id 0x%08x\n" , info->disk_id); |
104 | printf("DISK# disk_id\n" ); |
105 | for (i = 0; i < 8; i++) { |
106 | if (info->disks[i]) |
107 | printf(" %d 0x%08x\n" , i, info->disks[i]); |
108 | } |
109 | printf("checksum 0x%02x\n" , info->checksum); |
110 | printf("=================================================\n" ); |
111 | } |
112 | #endif |
113 | |
114 | int |
115 | ata_raid_read_config_via(struct wd_softc *sc) |
116 | { |
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 = malloc(sizeof(*info), M_DEVBUF, M_WAITOK); |
129 | |
130 | bmajor = devsw_name2blk(device_xname(sc->sc_dev), NULL, 0); |
131 | |
132 | /* Get a vnode for the raw partition of this disk. */ |
133 | dev = MAKEDISKDEV(bmajor, device_unit(sc->sc_dev), RAW_PART); |
134 | error = bdevvp(dev, &vp); |
135 | if (error) |
136 | goto out; |
137 | |
138 | error = VOP_OPEN(vp, FREAD, NOCRED); |
139 | if (error) { |
140 | vput(vp); |
141 | goto out; |
142 | } |
143 | |
144 | error = ata_raid_config_block_rw(vp, VIA_LBA(sc), info, |
145 | sizeof(*info), B_READ); |
146 | VOP_CLOSE(vp, FREAD, NOCRED); |
147 | vput(vp); |
148 | if (error) { |
149 | aprint_error_dev(sc->sc_dev, |
150 | "error %d reading VIA V-RAID config block\n" , error); |
151 | goto out; |
152 | } |
153 | |
154 | #ifdef ATA_RAID_DEBUG |
155 | ata_raid_via_print_info(info); |
156 | printf("MAGIC == 0x%02x\n" , info->magic); |
157 | #endif |
158 | |
159 | /* Check the signature. */ |
160 | if (info->magic != VIA_MAGIC) { |
161 | DPRINTF(("%s: VIA V-RAID signature check failed\n" , |
162 | device_xname(sc->sc_dev))); |
163 | error = ESRCH; |
164 | goto out; |
165 | } |
166 | |
167 | /* calculate checksum and compare for valid */ |
168 | for (byte3 = 0, checksum = 0, ptr = (uint8_t *)info, count = 0; |
169 | count < 50; count++) |
170 | if (count == 3) |
171 | byte3 = *ptr++; |
172 | else |
173 | checksum += *ptr++; |
174 | checksum_alt = checksum + (byte3 & ~VIA_T_BOOTABLE); |
175 | checksum += byte3; |
176 | if (checksum != info->checksum && checksum_alt != info->checksum) { |
177 | DPRINTF(("%s: VIA V-RAID checksum failed 0x%02x != " |
178 | "0x%02x or 0x%02x\n" , device_xname(sc->sc_dev), |
179 | info->checksum, checksum, checksum_alt)); |
180 | error = ESRCH; |
181 | goto out; |
182 | } |
183 | |
184 | /* |
185 | * Lookup or allocate a new array info structure for |
186 | * this array. Use the serial number of disk0 as the array# |
187 | */ |
188 | aai = ata_raid_get_array_info(ATA_RAID_TYPE_VIA, info->disks[0]); |
189 | |
190 | aai->aai_status = AAI_S_READY; |
191 | |
192 | switch (info->type & VIA_T_MASK) { |
193 | case VIA_T_RAID0: |
194 | aai->aai_level = AAI_L_RAID0; |
195 | aai->aai_width = info->stripe_layout & VIA_L_DISKS; |
196 | aai->aai_capacity = aai->aai_width * info->disk_sectors; |
197 | break; |
198 | |
199 | case VIA_T_RAID1: |
200 | aai->aai_level = AAI_L_RAID1; |
201 | aai->aai_width = 1; |
202 | aai->aai_capacity = aai->aai_width * info->disk_sectors; |
203 | break; |
204 | |
205 | case VIA_T_RAID5: |
206 | aai->aai_level = AAI_L_RAID5; |
207 | aai->aai_width = info->stripe_layout & VIA_L_DISKS; |
208 | aai->aai_capacity = (aai->aai_width - 1) * info->disk_sectors; |
209 | break; |
210 | |
211 | case VIA_T_SPAN: |
212 | aai->aai_level = AAI_L_SPAN; |
213 | aai->aai_width = 1; |
214 | aai->aai_capacity += info->disk_sectors; /* XXX ??? */ |
215 | break; |
216 | |
217 | default: |
218 | aprint_error_dev(sc->sc_dev, |
219 | "unknown VIA V-RAID type 0x%02x\n" , info->type); |
220 | error = EINVAL; |
221 | goto out; |
222 | } |
223 | |
224 | aai->aai_type = ATA_RAID_TYPE_VIA; |
225 | for (count = 0, disk = 0; disk < 8; disk++) |
226 | if (info->disks[disk]) |
227 | count++; |
228 | aai->aai_interleave = |
229 | 0x08 << ((info->stripe_layout & VIA_L_MASK) >> VIA_L_SHIFT); |
230 | aai->aai_ndisks = count; |
231 | aai->aai_heads = 255; |
232 | aai->aai_sectors = 63; |
233 | aai->aai_cylinders = aai->aai_capacity / (63 * 255); |
234 | aai->aai_offset = 0; |
235 | aai->aai_reserved = 1; |
236 | |
237 | /* XXX - bogus. RAID1 shouldn't really have an interleave */ |
238 | if (aai->aai_interleave == 0) |
239 | aai->aai_interleave = aai->aai_capacity; |
240 | |
241 | atabus = device_private(device_parent(sc->sc_dev)); |
242 | drive = atabus->sc_chan->ch_channel; |
243 | if (drive >= aai->aai_ndisks) { |
244 | aprint_error_dev(sc->sc_dev, |
245 | "drive number %d doesn't make sense within %d-disk " |
246 | "array\n" , drive, aai->aai_ndisks); |
247 | error = EINVAL; |
248 | goto out; |
249 | } |
250 | |
251 | adi = &aai->aai_disks[drive]; |
252 | adi->adi_dev = sc->sc_dev; |
253 | adi->adi_status = ADI_S_ONLINE | ADI_S_ASSIGNED; |
254 | adi->adi_sectors = aai->aai_capacity; |
255 | adi->adi_compsize = info->disk_sectors; |
256 | |
257 | error = 0; |
258 | |
259 | out: |
260 | free(info, M_DEVBUF); |
261 | return (error); |
262 | } |
263 | |