ch.c revision 1.16
1 /* $NetBSD: ch.c,v 1.16 1996/03/05 00:15:09 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1994 Charles Hannum. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by Charles Hannum. 17 * 4. The name of the author may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Originally written by grefen@????? 34 * Based on scsi drivers by Julian Elischer (julian (at) tfs.com) 35 */ 36 37 #include <sys/types.h> 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/errno.h> 41 #include <sys/ioctl.h> 42 #include <sys/buf.h> 43 #include <sys/proc.h> 44 #include <sys/user.h> 45 #include <sys/chio.h> 46 #include <sys/device.h> 47 48 #include <scsi/scsi_all.h> 49 #include <scsi/scsi_changer.h> 50 #include <scsi/scsiconf.h> 51 #include <scsi/scsi_conf.h> 52 53 #define CHRETRIES 2 54 55 #define CHMODE(z) (minor(z) & 0x0f) 56 #define CHUNIT(z) (minor(z) >> 4) 57 58 struct ch_softc { 59 struct device sc_dev; 60 61 struct scsi_link *sc_link; /* all the inter level info */ 62 u_int16_t chmo; /* Offset of first CHM */ 63 u_int16_t chms; /* No. of CHM */ 64 u_int16_t slots; /* No. of Storage Elements */ 65 u_int16_t sloto; /* Offset of first SE */ 66 u_int16_t imexs; /* No. of Import/Export Slots */ 67 u_int16_t imexo; /* Offset of first IM/EX */ 68 u_int16_t drives; /* No. of CTS */ 69 u_int16_t driveo; /* Offset of first CTS */ 70 u_int16_t rot; /* CHM can rotate */ 71 u_long op_matrix; /* possible operations */ 72 u_int16_t lsterr; /* details of lasterror */ 73 u_char stor; /* posible Storage locations */ 74 }; 75 76 int chmatch __P((struct device *, void *, void *)); 77 void chattach __P((struct device *, struct device *, void *)); 78 int ch_getelem __P((struct ch_softc *, short *, int, int , char *, int)); 79 int ch_move __P((struct ch_softc *, short *, int, int , int , int )); 80 int ch_position __P((struct ch_softc *, short *, int, int , int )); 81 int ch_mode_sense __P((struct ch_softc *, int)); 82 83 struct cfdriver chcd = { 84 NULL, "ch", chmatch, chattach, DV_DULL, sizeof(struct ch_softc) 85 }; 86 87 /* 88 * This driver is so simple it uses all the default services 89 */ 90 struct scsi_device ch_switch = { 91 NULL, 92 NULL, 93 NULL, 94 NULL, 95 }; 96 97 struct scsi_inquiry_pattern ch_patterns[] = { 98 {T_CHANGER, T_REMOV, 99 "", "", ""}, 100 }; 101 102 int 103 chmatch(parent, match, aux) 104 struct device *parent; 105 void *match, *aux; 106 { 107 struct scsibus_attach_args *sa = aux; 108 int priority; 109 110 (void)scsi_inqmatch(sa->sa_inqbuf, 111 (caddr_t)ch_patterns, sizeof(ch_patterns)/sizeof(ch_patterns[0]), 112 sizeof(ch_patterns[0]), &priority); 113 return (priority); 114 } 115 116 /* 117 * The routine called by the low level scsi routine when it discovers 118 * a device suitable for this driver. 119 */ 120 void 121 chattach(parent, self, aux) 122 struct device *parent, *self; 123 void *aux; 124 { 125 struct ch_softc *ch = (void *)self; 126 struct scsibus_attach_args *sa = aux; 127 struct scsi_link *sc_link = sa->sa_sc_link; 128 129 SC_DEBUG(sc_link, SDEV_DB2, ("chattach: ")); 130 131 /* 132 * Store information needed to contact our base driver 133 */ 134 ch->sc_link = sc_link; 135 sc_link->device = &ch_switch; 136 sc_link->device_softc = ch; 137 sc_link->openings = 1; 138 139 /* 140 * Use the subdriver to request information regarding 141 * the drive. We cannot use interrupts yet, so the 142 * request must specify this. 143 */ 144 printf("\n"); 145 printf("%s: ", ch->sc_dev.dv_xname); 146 if (ch_mode_sense(ch, SCSI_AUTOCONF) != 0) 147 printf("offline\n"); 148 else 149 printf("%d slot(s), %d drive(s), %d arm(s), %d i/e-slot(s)\n", 150 ch->slots, ch->drives, ch->chms, ch->imexs); 151 } 152 153 /* 154 * open the device. 155 */ 156 int 157 chopen(dev, flags, mode, p) 158 dev_t dev; 159 int flags; 160 int mode; 161 struct proc *p; 162 { 163 int error = 0; 164 int unit; 165 struct ch_softc *ch; 166 struct scsi_link *sc_link; 167 168 unit = CHUNIT(dev); 169 if (unit >= chcd.cd_ndevs) 170 return ENXIO; 171 ch = chcd.cd_devs[unit]; 172 if (!ch) 173 return ENXIO; 174 175 sc_link = ch->sc_link; 176 177 SC_DEBUG(sc_link, SDEV_DB1, 178 ("chopen: dev=0x%x (unit %d (of %d))\n", dev, unit, chcd.cd_ndevs)); 179 180 /* 181 * Only allow one at a time 182 */ 183 if (sc_link->flags & SDEV_OPEN) { 184 printf("%s: already open\n", ch->sc_dev.dv_xname); 185 return EBUSY; 186 } 187 188 /* 189 * Catch any unit attention errors. 190 */ 191 error = scsi_test_unit_ready(sc_link, SCSI_IGNORE_MEDIA_CHANGE); 192 if (error) 193 goto bad; 194 195 sc_link->flags |= SDEV_OPEN; /* unit attn are now errors */ 196 197 /* 198 * Make sure data is loaded 199 */ 200 if ((error = ch_mode_sense(ch, 0)) != 0) { 201 printf("%s: offline\n", ch->sc_dev.dv_xname); 202 goto bad; 203 } 204 205 SC_DEBUG(sc_link, SDEV_DB3, ("open complete\n")); 206 return 0; 207 208 bad: 209 sc_link->flags &= ~SDEV_OPEN; 210 return error; 211 } 212 213 /* 214 * close the device.. only called if we are the LAST 215 * occurence of an open device 216 */ 217 int 218 chclose(dev, flags, mode, p) 219 dev_t dev; 220 int flags; 221 int mode; 222 struct proc *p; 223 { 224 struct ch_softc *ch = chcd.cd_devs[CHUNIT(dev)]; 225 226 SC_DEBUG(ch->sc_link, SDEV_DB1, ("closing\n")); 227 ch->sc_link->flags &= ~SDEV_OPEN; 228 229 return 0; 230 } 231 232 /* 233 * Perform special action on behalf of the user 234 * Knows about the internals of this device 235 */ 236 int 237 chioctl(dev, cmd, arg, mode, p) 238 dev_t dev; 239 u_long cmd; 240 caddr_t arg; 241 int mode; 242 struct proc *p; 243 { 244 struct ch_softc *ch = chcd.cd_devs[CHUNIT(dev)]; 245 struct scsi_link *sc_link = ch->sc_link; 246 int flags; 247 248 /* 249 * Find the device that the user is talking about 250 */ 251 flags = 0; /* give error messages, act on errors etc. */ 252 253 switch (cmd) { 254 case CHIOOP: { 255 struct chop *chop = (struct chop *) arg; 256 SC_DEBUG(sc_link, SDEV_DB2, ("[chtape_chop: %x]\n", 257 chop->ch_op)); 258 259 switch (chop->ch_op) { 260 case CHGETPARAM: 261 chop->u.getparam.chmo = ch->chmo; 262 chop->u.getparam.chms = ch->chms; 263 chop->u.getparam.sloto = ch->sloto; 264 chop->u.getparam.slots = ch->slots; 265 chop->u.getparam.imexo = ch->imexo; 266 chop->u.getparam.imexs = ch->imexs; 267 chop->u.getparam.driveo = ch->driveo; 268 chop->u.getparam.drives = ch->drives; 269 chop->u.getparam.rot = ch->rot; 270 chop->result = 0; 271 return 0; 272 break; 273 case CHPOSITION: 274 return ch_position(ch, &chop->result, 275 chop->u.position.chm, chop->u.position.to, flags); 276 case CHMOVE: 277 return ch_move(ch, &chop->result, chop->u.position.chm, 278 chop->u.move.from, chop->u.move.to, flags); 279 case CHGETELEM: 280 return ch_getelem(ch, &chop->result, 281 chop->u.get_elem_stat.type, 282 chop->u.get_elem_stat.from, 283 (char *) &chop->u.get_elem_stat.elem_data, flags); 284 default: 285 return EINVAL; 286 } 287 } 288 default: 289 return scsi_do_ioctl(sc_link, dev, cmd, arg, mode, p); 290 } 291 #ifdef DIAGNOSTIC 292 panic("chioctl: impossible"); 293 #endif 294 } 295 296 int 297 ch_getelem(ch, stat, type, from, data, flags) 298 struct ch_softc *ch; 299 short *stat; 300 int type, from; 301 char *data; 302 int flags; 303 { 304 struct scsi_read_element_status scsi_cmd; 305 char elbuf[32]; 306 int error; 307 308 bzero(&scsi_cmd, sizeof(scsi_cmd)); 309 scsi_cmd.opcode = READ_ELEMENT_STATUS; 310 scsi_cmd.byte2 = type; 311 scsi_cmd.starting_element_addr[0] = (from >> 8) & 0xff; 312 scsi_cmd.starting_element_addr[1] = from & 0xff; 313 scsi_cmd.number_of_elements[1] = 1; 314 scsi_cmd.allocation_length[2] = 32; 315 316 error = scsi_scsi_cmd(ch->sc_link, (struct scsi_generic *) &scsi_cmd, 317 sizeof(scsi_cmd), (u_char *) elbuf, 32, CHRETRIES, 100000, NULL, 318 SCSI_DATA_IN | flags); 319 if (error) 320 *stat = ch->lsterr; 321 else 322 *stat = 0; 323 bcopy(elbuf + 16, data, 16); 324 return error; 325 } 326 327 int 328 ch_move(ch, stat, chm, from, to, flags) 329 struct ch_softc *ch; 330 short *stat; 331 int chm, from, to, flags; 332 { 333 struct scsi_move_medium scsi_cmd; 334 int error; 335 336 bzero(&scsi_cmd, sizeof(scsi_cmd)); 337 scsi_cmd.opcode = MOVE_MEDIUM; 338 scsi_cmd.transport_element_address[0] = (chm >> 8) & 0xff; 339 scsi_cmd.transport_element_address[1] = chm & 0xff; 340 scsi_cmd.source_address[0] = (from >> 8) & 0xff; 341 scsi_cmd.source_address[1] = from & 0xff; 342 scsi_cmd.destination_address[0] = (to >> 8) & 0xff; 343 scsi_cmd.destination_address[1] = to & 0xff; 344 scsi_cmd.invert = (chm & CH_INVERT) ? 1 : 0; 345 error = scsi_scsi_cmd(ch->sc_link, (struct scsi_generic *) &scsi_cmd, 346 sizeof(scsi_cmd), NULL, 0, CHRETRIES, 100000, NULL, flags); 347 if (error) 348 *stat = ch->lsterr; 349 else 350 *stat = 0; 351 return error; 352 } 353 354 int 355 ch_position(ch, stat, chm, to, flags) 356 struct ch_softc *ch; 357 short *stat; 358 int chm, to, flags; 359 { 360 struct scsi_position_to_element scsi_cmd; 361 int error; 362 363 bzero(&scsi_cmd, sizeof(scsi_cmd)); 364 scsi_cmd.opcode = POSITION_TO_ELEMENT; 365 scsi_cmd.transport_element_address[0] = (chm >> 8) & 0xff; 366 scsi_cmd.transport_element_address[1] = chm & 0xff; 367 scsi_cmd.source_address[0] = (to >> 8) & 0xff; 368 scsi_cmd.source_address[1] = to & 0xff; 369 scsi_cmd.invert = (chm & CH_INVERT) ? 1 : 0; 370 error = scsi_scsi_cmd(ch->sc_link, (struct scsi_generic *) &scsi_cmd, 371 sizeof(scsi_cmd), NULL, 0, CHRETRIES, 100000, NULL, flags); 372 if (error) 373 *stat = ch->lsterr; 374 else 375 *stat = 0; 376 return error; 377 } 378 379 /* 380 * Get the scsi driver to send a full inquiry to the 381 * device and use the results to fill out the global 382 * parameter structure. 383 */ 384 int 385 ch_mode_sense(ch, flags) 386 struct ch_softc *ch; 387 int flags; 388 { 389 struct scsi_mode_sense scsi_cmd; 390 u_char scsi_sense[128]; /* Can't use scsi_mode_sense_data because of 391 * missing block descriptor. 392 */ 393 u_char *b; 394 int i, l; 395 int error; 396 struct scsi_link *sc_link = ch->sc_link; 397 398 /* 399 * First check if we have it all loaded 400 */ 401 if (sc_link->flags & SDEV_MEDIA_LOADED) 402 return 0; 403 404 /* 405 * First do a mode sense 406 */ 407 bzero(&scsi_cmd, sizeof(scsi_cmd)); 408 scsi_cmd.opcode = MODE_SENSE; 409 scsi_cmd.byte2 = SMS_DBD; 410 scsi_cmd.page = 0x3f; /* All Pages */ 411 scsi_cmd.length = sizeof(scsi_sense); 412 413 /* 414 * Read in the pages 415 */ 416 error = scsi_scsi_cmd(sc_link, (struct scsi_generic *) &scsi_cmd, 417 sizeof(scsi_cmd), (u_char *) &scsi_sense, 418 sizeof(scsi_sense), CHRETRIES, 5000, NULL, 419 flags | SCSI_DATA_IN); 420 if (error) { 421 printf("%s: could not mode sense\n", ch->sc_dev.dv_xname); 422 return error; 423 } 424 425 sc_link->flags |= SDEV_MEDIA_LOADED; 426 l = scsi_sense[0] - 3; 427 b = &scsi_sense[4]; 428 429 /* 430 * To avoid alignment problems 431 */ 432 /* XXXX - FIX THIS FOR MSB */ 433 #define p2copy(valp) (valp[1] | (valp[0]<<8)); valp+=2 434 #define p4copy(valp) (valp[3] | (valp[2]<<8) | (valp[1]<<16) | (valp[0]<<24)); valp+=4 435 #if 0 436 printf("\nmode_sense %d\n", l); 437 for (i = 0; i < l + 4; i++) 438 printf("%x%c", scsi_sense[i], i % 8 == 7 ? '\n' : ':'); 439 printf("\n"); 440 #endif 441 for (i = 0; i < l;) { 442 u_char pc = (*b++) & 0x3f; 443 u_char pl = *b++; 444 u_char *bb = b; 445 switch (pc) { 446 case 0x1d: 447 ch->chmo = p2copy(bb); 448 ch->chms = p2copy(bb); 449 ch->sloto = p2copy(bb); 450 ch->slots = p2copy(bb); 451 ch->imexo = p2copy(bb); 452 ch->imexs = p2copy(bb); 453 ch->driveo = p2copy(bb); 454 ch->drives = p2copy(bb); 455 break; 456 case 0x1e: 457 ch->rot = *b & 0x1; 458 break; 459 case 0x1f: 460 ch->stor = *b & 0xf; 461 bb += 2; 462 ch->stor = p4copy(bb); 463 break; 464 default: 465 break; 466 } 467 b += pl; 468 i += pl + 2; 469 } 470 SC_DEBUG(sc_link, SDEV_DB2, 471 (" cht(%d-%d)slot(%d-%d)imex(%d-%d)cts(%d-%d) %s rotate\n", 472 ch->chmo, ch->chms, ch->sloto, ch->slots, ch->imexo, ch->imexs, 473 ch->driveo, ch->drives, ch->rot ? "can" : "can't")); 474 return 0; 475 } 476
Indexes created Mon Sep 29 21:09:56 GMT 2025