1 /* $NetBSD: ata_raid.c,v 1.8 2004/01/25 18:06:48 hannken Exp $ */ 2 3 /* 4 * Copyright (c) 2003 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Jason R. Thorpe for Wasabi Systems, Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed for the NetBSD Project by 20 * Wasabi Systems, Inc. 21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 22 * or promote products derived from this software without specific prior 23 * written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 /* 39 * Support for autoconfiguration of RAID sets on ATA RAID controllers. 40 */ 41 42 #include <sys/cdefs.h> 43 __KERNEL_RCSID(0, "$NetBSD: ata_raid.c,v 1.8 2004/01/25 18:06:48 hannken Exp $"); 44 45 #include <sys/param.h> 46 #include <sys/buf.h> 47 #include <sys/conf.h> 48 #include <sys/device.h> 49 #include <sys/disk.h> 50 #include <sys/disklabel.h> 51 #include <sys/fcntl.h> 52 #include <sys/malloc.h> 53 #include <sys/vnode.h> 54 55 #include <miscfs/specfs/specdev.h> 56 57 #include <dev/ata/atareg.h> 58 #include <dev/ata/atavar.h> 59 #include <dev/ata/wdvar.h> 60 61 #include <dev/ata/ata_raidreg.h> 62 #include <dev/ata/ata_raidvar.h> 63 64 #include "locators.h" 65 66 #ifdef ATA_RAID_DEBUG 67 #define DPRINTF(x) printf x 68 #else 69 #define DPRINTF(x) /* nothing */ 70 #endif 71 72 void ataraidattach(int); 73 74 static int ataraid_match(struct device *, struct cfdata *, void *); 75 static void ataraid_attach(struct device *, struct device *, void *); 76 static int ataraid_print(void *, const char *); 77 78 static int ataraid_submatch(struct device *, struct cfdata *, void *); 79 80 static int ata_raid_finalize(struct device *); 81 82 ataraid_array_info_list_t ataraid_array_info_list = 83 TAILQ_HEAD_INITIALIZER(ataraid_array_info_list); 84 u_int ataraid_array_info_count; 85 86 CFATTACH_DECL(ataraid, sizeof(struct device), 87 ataraid_match, ataraid_attach, NULL, NULL); 88 89 /* 90 * ataraidattach: 91 * 92 * Pseudo-device attach routine. 93 */ 94 void 95 ataraidattach(int count) 96 { 97 98 /* 99 * Register a finalizer which will be used to actually configure 100 * the logical disks configured by ataraid. 101 */ 102 if (config_finalize_register(NULL, ata_raid_finalize) != 0) 103 printf("WARNING: unable to register ATA RAID finalizer\n"); 104 } 105 106 /* 107 * ata_raid_type_name: 108 * 109 * Return the type of ATA RAID. 110 */ 111 const char * 112 ata_raid_type_name(u_int type) 113 { 114 static const char *ata_raid_type_names[] = { 115 "Promise", 116 }; 117 118 if (type <= ATA_RAID_TYPE_MAX) 119 return (ata_raid_type_names[type]); 120 121 return (NULL); 122 } 123 124 /* 125 * ata_raid_finalize: 126 * 127 * Autoconfiguration finalizer for ATA RAID. 128 */ 129 static int 130 ata_raid_finalize(struct device *self) 131 { 132 extern struct cfdriver ataraid_cd; 133 static int done_once; 134 int error; 135 136 /* 137 * Since we only handle real hardware, we only need to be 138 * called once. 139 */ 140 if (done_once) 141 return (0); 142 done_once = 1; 143 144 if (TAILQ_EMPTY(&ataraid_array_info_list)) 145 goto out; 146 147 error = config_cfattach_attach(ataraid_cd.cd_name, &ataraid_ca); 148 if (error) { 149 printf("%s: unable to register cfattach, error = %d\n", 150 ataraid_cd.cd_name, error); 151 (void) config_cfdriver_detach(&ataraid_cd); 152 goto out; 153 } 154 155 if (config_attach_pseudo(ataraid_cd.cd_name, -1) == NULL) 156 printf("%s: unable to attach an instance\n", 157 ataraid_cd.cd_name); 158 159 out: 160 return (1); 161 } 162 163 /* 164 * ataraid_match: 165 * 166 * Autoconfiguration glue: match routine. 167 */ 168 static int 169 ataraid_match(struct device *parent, struct cfdata *cf, void *aux) 170 { 171 172 /* pseudo-device; always present */ 173 return (1); 174 } 175 176 /* 177 * ataraid_attach: 178 * 179 * Autoconfiguration glue: attach routine. We attach the children. 180 */ 181 static void 182 ataraid_attach(struct device *parent, struct device *self, void *aux) 183 { 184 struct ataraid_array_info *aai; 185 186 /* 187 * We're a pseudo-device, so we get to announce our own 188 * presence. 189 */ 190 aprint_normal("%s: found %u RAID volume%s\n", 191 self->dv_xname, ataraid_array_info_count, 192 ataraid_array_info_count == 1 ? "" : "s"); 193 194 TAILQ_FOREACH(aai, &ataraid_array_info_list, aai_list) { 195 config_found_sm(self, aai, ataraid_print, ataraid_submatch); 196 } 197 } 198 199 /* 200 * ataraid_print: 201 * 202 * Autoconfiguration glue: print routine. 203 */ 204 static int 205 ataraid_print(void *aux, const char *pnp) 206 { 207 struct ataraid_array_info *aai = aux; 208 209 if (pnp != NULL) 210 aprint_normal("block device at %s", pnp); 211 aprint_normal(" vendtype %d unit %d", aai->aai_type, aai->aai_arrayno); 212 return (UNCONF); 213 } 214 215 /* 216 * ataraid_submatch: 217 * 218 * Submatch routine for ATA RAID logical disks. 219 */ 220 static int 221 ataraid_submatch(struct device *parent, struct cfdata *cf, void *aux) 222 { 223 struct ataraid_array_info *aai = aux; 224 225 if (cf->cf_loc[ATARAIDCF_VENDTYPE] != ATARAIDCF_VENDTYPE_DEFAULT && 226 cf->cf_loc[ATARAIDCF_VENDTYPE] != aai->aai_type) 227 return (0); 228 229 if (cf->cf_loc[ATARAIDCF_UNIT] != ATARAIDCF_UNIT_DEFAULT && 230 cf->cf_loc[ATARAIDCF_UNIT] != aai->aai_arrayno) 231 return (0); 232 233 return (config_match(parent, cf, aux)); 234 } 235 236 /* 237 * ata_raid_check_component: 238 * 239 * Check the component for a RAID configuration structure. 240 * Called via autoconfiguration callback. 241 */ 242 void 243 ata_raid_check_component(struct device *self) 244 { 245 struct wd_softc *sc = (void *) self; 246 247 if (ata_raid_read_config_promise(sc) == 0) 248 return; 249 } 250 251 struct ataraid_array_info * 252 ata_raid_get_array_info(u_int type, u_int arrayno) 253 { 254 struct ataraid_array_info *aai, *laai; 255 256 TAILQ_FOREACH(aai, &ataraid_array_info_list, aai_list) { 257 if (aai->aai_type == type && 258 aai->aai_arrayno == arrayno) 259 goto out; 260 } 261 262 /* Need to allocate a new one. */ 263 aai = malloc(sizeof(*aai), M_DEVBUF, M_WAITOK | M_ZERO); 264 aai->aai_type = type; 265 aai->aai_arrayno = arrayno; 266 267 ataraid_array_info_count++; 268 269 if (TAILQ_EMPTY(&ataraid_array_info_list)) { 270 TAILQ_INSERT_TAIL(&ataraid_array_info_list, aai, aai_list); 271 goto out; 272 } 273 274 /* Sort it into the list: type first, then array number. */ 275 TAILQ_FOREACH(laai, &ataraid_array_info_list, aai_list) { 276 if (aai->aai_type < laai->aai_type) { 277 TAILQ_INSERT_BEFORE(laai, aai, aai_list); 278 goto out; 279 } 280 if (aai->aai_type == laai->aai_type && 281 aai->aai_arrayno < laai->aai_arrayno) { 282 TAILQ_INSERT_BEFORE(laai, aai, aai_list); 283 goto out; 284 } 285 } 286 TAILQ_INSERT_TAIL(&ataraid_array_info_list, aai, aai_list); 287 288 out: 289 return (aai); 290 } 291 292 int 293 ata_raid_config_block_rw(struct vnode *vp, daddr_t blkno, void *buf, 294 size_t size, int bflags) 295 { 296 struct buf *bp; 297 int error, s; 298 299 s = splbio(); 300 bp = pool_get(&bufpool, PR_WAITOK); 301 splx(s); 302 BUF_INIT(bp); 303 304 bp->b_vp = vp; 305 bp->b_blkno = blkno; 306 bp->b_bcount = bp->b_resid = size; 307 bp->b_flags = bflags; 308 bp->b_proc = curproc; 309 bp->b_data = buf; 310 311 VOP_STRATEGY(vp, bp); 312 error = biowait(bp); 313 314 s = splbio(); 315 pool_put(&bufpool, bp); 316 splx(s); 317 return (error); 318 } 319