1 /* $NetBSD: ata_raid.c,v 1.18 2006/01/04 10:13:05 yamt 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 1.18 2006/01/04 10:13:05 yamt Exp $"); 44 45 #include <sys/param.h> 46 #include <sys/buf.h> 47 #include <sys/bufq.h> 48 #include <sys/conf.h> 49 #include <sys/device.h> 50 #include <sys/disk.h> 51 #include <sys/disklabel.h> 52 #include <sys/fcntl.h> 53 #include <sys/malloc.h> 54 #include <sys/vnode.h> 55 56 #include <miscfs/specfs/specdev.h> 57 58 #include <dev/ata/atareg.h> 59 #include <dev/ata/atavar.h> 60 #include <dev/ata/wdvar.h> 61 62 #include <dev/ata/ata_raidreg.h> 63 #include <dev/ata/ata_raidvar.h> 64 65 #include "locators.h" 66 67 #ifdef ATA_RAID_DEBUG 68 #define DPRINTF(x) printf x 69 #else 70 #define DPRINTF(x) /* nothing */ 71 #endif 72 73 void ataraidattach(int); 74 75 static int ataraid_match(struct device *, struct cfdata *, void *); 76 static void ataraid_attach(struct device *, struct device *, void *); 77 static int ataraid_print(void *, const char *); 78 79 static int ata_raid_finalize(struct device *); 80 81 ataraid_array_info_list_t ataraid_array_info_list = 82 TAILQ_HEAD_INITIALIZER(ataraid_array_info_list); 83 u_int ataraid_array_info_count; 84 85 CFATTACH_DECL(ataraid, sizeof(struct device), 86 ataraid_match, ataraid_attach, NULL, NULL); 87 88 /* 89 * ataraidattach: 90 * 91 * Pseudo-device attach routine. 92 */ 93 void 94 ataraidattach(int count) 95 { 96 97 /* 98 * Register a finalizer which will be used to actually configure 99 * the logical disks configured by ataraid. 100 */ 101 if (config_finalize_register(NULL, ata_raid_finalize) != 0) 102 printf("WARNING: unable to register ATA RAID finalizer\n"); 103 } 104 105 /* 106 * ata_raid_type_name: 107 * 108 * Return the type of ATA RAID. 109 */ 110 const char * 111 ata_raid_type_name(u_int type) 112 { 113 static const char *ata_raid_type_names[] = { 114 "Promise", 115 "Adaptec", 116 }; 117 118 if (type < sizeof(ata_raid_type_names) / sizeof(ata_raid_type_names[0])) 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 static struct cfdata ataraid_cfdata = { 133 .cf_name = "ataraid", 134 .cf_atname = "ataraid", 135 .cf_unit = DVUNIT_ANY, 136 .cf_fstate = FSTATE_STAR, 137 }; 138 extern struct cfdriver ataraid_cd; 139 static int done_once; 140 int error; 141 142 /* 143 * Since we only handle real hardware, we only need to be 144 * called once. 145 */ 146 if (done_once) 147 return (0); 148 done_once = 1; 149 150 if (TAILQ_EMPTY(&ataraid_array_info_list)) 151 goto out; 152 153 error = config_cfattach_attach(ataraid_cd.cd_name, &ataraid_ca); 154 if (error) { 155 printf("%s: unable to register cfattach, error = %d\n", 156 ataraid_cd.cd_name, error); 157 (void) config_cfdriver_detach(&ataraid_cd); 158 goto out; 159 } 160 161 if (config_attach_pseudo(&ataraid_cfdata) == NULL) 162 printf("%s: unable to attach an instance\n", 163 ataraid_cd.cd_name); 164 165 out: 166 return (1); 167 } 168 169 /* 170 * ataraid_match: 171 * 172 * Autoconfiguration glue: match routine. 173 */ 174 static int 175 ataraid_match(struct device *parent, struct cfdata *cf, void *aux) 176 { 177 178 /* pseudo-device; always present */ 179 return (1); 180 } 181 182 /* 183 * ataraid_attach: 184 * 185 * Autoconfiguration glue: attach routine. We attach the children. 186 */ 187 static void 188 ataraid_attach(struct device *parent, struct device *self, void *aux) 189 { 190 struct ataraid_array_info *aai; 191 int locs[ATARAIDCF_NLOCS]; 192 193 /* 194 * We're a pseudo-device, so we get to announce our own 195 * presence. 196 */ 197 aprint_normal("%s: found %u RAID volume%s\n", 198 self->dv_xname, ataraid_array_info_count, 199 ataraid_array_info_count == 1 ? "" : "s"); 200 201 TAILQ_FOREACH(aai, &ataraid_array_info_list, aai_list) { 202 locs[ATARAIDCF_VENDTYPE] = aai->aai_type; 203 locs[ATARAIDCF_UNIT] = aai->aai_arrayno; 204 205 config_found_sm_loc(self, "ataraid", locs, aai, 206 ataraid_print, config_stdsubmatch); 207 } 208 } 209 210 /* 211 * ataraid_print: 212 * 213 * Autoconfiguration glue: print routine. 214 */ 215 static int 216 ataraid_print(void *aux, const char *pnp) 217 { 218 struct ataraid_array_info *aai = aux; 219 220 if (pnp != NULL) 221 aprint_normal("block device at %s", pnp); 222 aprint_normal(" vendtype %d unit %d", aai->aai_type, aai->aai_arrayno); 223 return (UNCONF); 224 } 225 226 /* 227 * ata_raid_check_component: 228 * 229 * Check the component for a RAID configuration structure. 230 * Called via autoconfiguration callback. 231 */ 232 void 233 ata_raid_check_component(struct device *self) 234 { 235 struct wd_softc *sc = (void *) self; 236 237 if (ata_raid_read_config_adaptec(sc) == 0) 238 return; 239 if (ata_raid_read_config_promise(sc) == 0) 240 return; 241 } 242 243 struct ataraid_array_info * 244 ata_raid_get_array_info(u_int type, u_int arrayno) 245 { 246 struct ataraid_array_info *aai, *laai; 247 248 TAILQ_FOREACH(aai, &ataraid_array_info_list, aai_list) { 249 if (aai->aai_type == type && 250 aai->aai_arrayno == arrayno) 251 goto out; 252 } 253 254 /* Need to allocate a new one. */ 255 aai = malloc(sizeof(*aai), M_DEVBUF, M_WAITOK | M_ZERO); 256 aai->aai_type = type; 257 aai->aai_arrayno = arrayno; 258 259 ataraid_array_info_count++; 260 261 if (TAILQ_EMPTY(&ataraid_array_info_list)) { 262 TAILQ_INSERT_TAIL(&ataraid_array_info_list, aai, aai_list); 263 goto out; 264 } 265 266 /* Sort it into the list: type first, then array number. */ 267 TAILQ_FOREACH(laai, &ataraid_array_info_list, aai_list) { 268 if (aai->aai_type < laai->aai_type) { 269 TAILQ_INSERT_BEFORE(laai, aai, aai_list); 270 goto out; 271 } 272 if (aai->aai_type == laai->aai_type && 273 aai->aai_arrayno < laai->aai_arrayno) { 274 TAILQ_INSERT_BEFORE(laai, aai, aai_list); 275 goto out; 276 } 277 } 278 TAILQ_INSERT_TAIL(&ataraid_array_info_list, aai, aai_list); 279 280 out: 281 return (aai); 282 } 283 284 int 285 ata_raid_config_block_rw(struct vnode *vp, daddr_t blkno, void *tbuf, 286 size_t size, int bflags) 287 { 288 struct buf *bp; 289 int error; 290 291 bp = getiobuf(); 292 bp->b_vp = vp; 293 bp->b_blkno = blkno; 294 bp->b_bcount = bp->b_resid = size; 295 bp->b_flags = bflags; 296 bp->b_proc = curproc; 297 bp->b_data = tbuf; 298 299 VOP_STRATEGY(vp, bp); 300 error = biowait(bp); 301 302 putiobuf(bp); 303 return (error); 304 } 305