1 | /* $NetBSD: ata_raid_jmicron.c,v 1.5 2014/03/25 16:19:13 christos Exp $ */ |
2 | |
3 | /*- |
4 | * Copyright (c) 2000-2008 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 JMicron Technology RAID controller configuration blocks. |
33 | * |
34 | * Adapted to NetBSD by Juan Romero Pardines (xtraeme@gmail.org). |
35 | */ |
36 | |
37 | #include <sys/cdefs.h> |
38 | __KERNEL_RCSID(0, "$NetBSD: ata_raid_jmicron.c,v 1.5 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_jmicron_type(int type) |
70 | { |
71 | static char buffer[16]; |
72 | |
73 | switch (type) { |
74 | case JM_T_RAID0: |
75 | return "RAID0" ; |
76 | case JM_T_RAID1: |
77 | return "RAID1" ; |
78 | case JM_T_RAID01: |
79 | return "RAID0+1" ; |
80 | case JM_T_RAID5: |
81 | return "RAID5" ; |
82 | case JM_T_JBOD: |
83 | return "JBOD" ; |
84 | default: |
85 | snprintf(buffer, sizeof(buffer), "UNKNOWN 0x%02x" , type); |
86 | return buffer; |
87 | } |
88 | } |
89 | |
90 | static void |
91 | ata_raid_jmicron_print_info(struct jmicron_raid_conf *info) |
92 | { |
93 | int i; |
94 | |
95 | printf("****** ATA JMicron Technology Corp Metadata ******\n" ); |
96 | printf("signature %.2s\n" , info->signature); |
97 | printf("version 0x%04x\n" , info->version); |
98 | printf("checksum 0x%04x\n" , info->checksum); |
99 | printf("disk_id 0x%08x\n" , info->disk_id); |
100 | printf("offset 0x%08x\n" , info->offset); |
101 | printf("disk_sectors_low 0x%08x\n" , info->disk_sectors_low); |
102 | printf("disk_sectors_high 0x%08x\n" , info->disk_sectors_high); |
103 | printf("name %.16s\n" , info->name); |
104 | printf("type %s\n" , |
105 | ata_raid_jmicron_type(info->type)); |
106 | printf("stripe_shift %d\n" , info->stripe_shift); |
107 | printf("flags 0x%04x\n" , info->flags); |
108 | printf("spare:\n" ); |
109 | for (i = 0; i < 2 && info->spare[i]; i++) |
110 | printf(" %d 0x%08x\n" , i, info->spare[i]); |
111 | printf("disks:\n" ); |
112 | for (i = 0; i < 8 && info->disks[i]; i++) |
113 | printf(" %d 0x%08x\n" , i, info->disks[i]); |
114 | printf("=================================================\n" ); |
115 | } |
116 | #endif |
117 | |
118 | int |
119 | ata_raid_read_config_jmicron(struct wd_softc *sc) |
120 | { |
121 | struct atabus_softc *atabus; |
122 | struct jmicron_raid_conf *info; |
123 | struct vnode *vp; |
124 | struct ataraid_array_info *aai; |
125 | struct ataraid_disk_info *adi; |
126 | uint64_t disk_size; |
127 | uint32_t drive; |
128 | uint16_t checksum, *ptr; |
129 | int bmajor, error, count, disk, total_disks; |
130 | dev_t dev; |
131 | |
132 | info = malloc(sizeof(*info), M_DEVBUF, M_WAITOK|M_ZERO); |
133 | |
134 | bmajor = devsw_name2blk(device_xname(sc->sc_dev), NULL, 0); |
135 | |
136 | /* Get a vnode for the raw partition of this disk. */ |
137 | dev = MAKEDISKDEV(bmajor, device_unit(sc->sc_dev), RAW_PART); |
138 | error = bdevvp(dev, &vp); |
139 | if (error) |
140 | goto out; |
141 | |
142 | error = VOP_OPEN(vp, FREAD, NOCRED); |
143 | if (error) { |
144 | vput(vp); |
145 | goto out; |
146 | } |
147 | |
148 | error = ata_raid_config_block_rw(vp, JMICRON_LBA(sc), info, |
149 | sizeof(*info), B_READ); |
150 | VOP_CLOSE(vp, FREAD, NOCRED); |
151 | vput(vp); |
152 | if (error) { |
153 | DPRINTF(("%s: error %d reading JMicron config block\n" , |
154 | device_xname(sc->sc_dev), error)); |
155 | goto out; |
156 | } |
157 | |
158 | /* Check for JMicron signature. */ |
159 | if (strncmp(info->signature, JMICRON_MAGIC, 2)) { |
160 | DPRINTF(("%s: JMicron RAID signature check failed\n" , |
161 | device_xname(sc->sc_dev))); |
162 | error = ESRCH; |
163 | goto out; |
164 | } |
165 | |
166 | /* calculate checksum and compare for valid */ |
167 | for (checksum = 0, ptr = (uint16_t *)info, count = 0; |
168 | count < 64; count++) |
169 | checksum += *ptr++; |
170 | if (checksum) { |
171 | DPRINTF(("%s: JMicron checksum failed\n" , |
172 | device_xname(sc->sc_dev))); |
173 | error = ESRCH; |
174 | goto out; |
175 | } |
176 | |
177 | #ifdef ATA_RAID_DEBUG |
178 | ata_raid_jmicron_print_info(info); |
179 | #endif |
180 | /* |
181 | * Check that there aren't stale config blocks without |
182 | * any array set configured. |
183 | */ |
184 | for (total_disks = 0, disk = 0; disk < JM_MAX_DISKS; disk++) |
185 | if (info->disks[disk] == info->disk_id) |
186 | total_disks++; |
187 | if (total_disks <= 1) { |
188 | error = EINVAL; |
189 | goto out; |
190 | } |
191 | |
192 | /* |
193 | * Check volume's state and bail out if it's not acceptable. |
194 | */ |
195 | if ((info->flags & (JM_F_READY|JM_F_BOOTABLE|JM_F_ACTIVE)) == 0) { |
196 | error = EINVAL; |
197 | goto out; |
198 | } |
199 | |
200 | /* |
201 | * Lookup or allocate a new array info structure for |
202 | * this array. |
203 | */ |
204 | aai = ata_raid_get_array_info(ATA_RAID_TYPE_JMICRON, 0); |
205 | aai->aai_status = AAI_S_READY; |
206 | |
207 | switch (info->type) { |
208 | case JM_T_RAID0: |
209 | aai->aai_level = AAI_L_RAID0; |
210 | aai->aai_width = total_disks; |
211 | break; |
212 | case JM_T_RAID1: |
213 | aai->aai_level = AAI_L_RAID1; |
214 | aai->aai_width = 1; |
215 | break; |
216 | case JM_T_RAID01: |
217 | aai->aai_level = AAI_L_RAID0 | AAI_L_RAID1; |
218 | aai->aai_width = total_disks / 2; |
219 | break; |
220 | case JM_T_JBOD: |
221 | aai->aai_level = AAI_L_SPAN; |
222 | aai->aai_width = total_disks; |
223 | break; |
224 | default: |
225 | DPRINTF(("%s: unknown JMicron RAID type 0x%02x\n" , |
226 | device_xname(sc->sc_dev), info->type)); |
227 | error = EINVAL; |
228 | goto out; |
229 | } |
230 | |
231 | disk_size = (info->disk_sectors_high << 16) + info->disk_sectors_low; |
232 | aai->aai_type = ATA_RAID_TYPE_JMICRON; |
233 | aai->aai_generation = 0; |
234 | aai->aai_capacity = disk_size * aai->aai_width; |
235 | aai->aai_interleave = 2 << info->stripe_shift; |
236 | aai->aai_ndisks = total_disks; |
237 | aai->aai_heads = 255; |
238 | aai->aai_sectors = 63; |
239 | aai->aai_cylinders = |
240 | aai->aai_capacity / (aai->aai_heads * aai->aai_sectors); |
241 | aai->aai_offset = info->offset * 16; |
242 | aai->aai_reserved = 2; |
243 | if (info->name) |
244 | strlcpy(aai->aai_name, info->name, sizeof(aai->aai_name)); |
245 | |
246 | atabus = device_private(device_parent(sc->sc_dev)); |
247 | drive = atabus->sc_chan->ch_channel; |
248 | if (drive >= aai->aai_ndisks) { |
249 | DPRINTF(("%s: drive number %d doesn't make sense within " |
250 | "%d-disk array\n" , device_xname(sc->sc_dev), |
251 | drive, aai->aai_ndisks)); |
252 | error = EINVAL; |
253 | goto out; |
254 | } |
255 | |
256 | if (info->disks[drive] == info->disk_id) { |
257 | adi = &aai->aai_disks[drive]; |
258 | adi->adi_dev = sc->sc_dev; |
259 | adi->adi_status = ADI_S_ONLINE | ADI_S_ASSIGNED; |
260 | adi->adi_sectors = aai->aai_capacity; |
261 | adi->adi_compsize = disk_size - aai->aai_reserved; |
262 | } |
263 | |
264 | error = 0; |
265 | |
266 | out: |
267 | free(info, M_DEVBUF); |
268 | return error; |
269 | } |
270 | |