ch.c revision 1.15
1 /* $NetBSD: ch.c,v 1.15 1996/02/14 21:47:07 christos 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 if (ch_mode_sense(ch, SCSI_AUTOCONF) != 0) 145 printf(": offline\n"); 146 else 147 printf(": %d slot(s), %d drive(s), %d arm(s), %d i/e-slot(s)\n", 148 ch->slots, ch->drives, ch->chms, ch->imexs); 149 } 150 151 /* 152 * open the device. 153 */ 154 int 155 chopen(dev, flags, mode, p) 156 dev_t dev; 157 int flags; 158 int mode; 159 struct proc *p; 160 { 161 int error = 0; 162 int unit; 163 struct ch_softc *ch; 164 struct scsi_link *sc_link; 165 166 unit = CHUNIT(dev); 167 if (unit >= chcd.cd_ndevs) 168 return ENXIO; 169 ch = chcd.cd_devs[unit]; 170 if (!ch) 171 return ENXIO; 172 173 sc_link = ch->sc_link; 174 175 SC_DEBUG(sc_link, SDEV_DB1, 176 ("chopen: dev=0x%x (unit %d (of %d))\n", dev, unit, chcd.cd_ndevs)); 177 178 /* 179 * Only allow one at a time 180 */ 181 if (sc_link->flags & SDEV_OPEN) { 182 printf("%s: already open\n", ch->sc_dev.dv_xname); 183 return EBUSY; 184 } 185 186 /* 187 * Catch any unit attention errors. 188 */ 189 error = scsi_test_unit_ready(sc_link, SCSI_IGNORE_MEDIA_CHANGE); 190 if (error) 191 goto bad; 192 193 sc_link->flags |= SDEV_OPEN; /* unit attn are now errors */ 194 195 /* 196 * Make sure data is loaded 197 */ 198 if ((error = ch_mode_sense(ch, 0)) != 0) { 199 printf("%s: offline\n", ch->sc_dev.dv_xname); 200 goto bad; 201 } 202 203 SC_DEBUG(sc_link, SDEV_DB3, ("open complete\n")); 204 return 0; 205 206 bad: 207 sc_link->flags &= ~SDEV_OPEN; 208 return error; 209 } 210 211 /* 212 * close the device.. only called if we are the LAST 213 * occurence of an open device 214 */ 215 int 216 chclose(dev, flags, mode, p) 217 dev_t dev; 218 int flags; 219 int mode; 220 struct proc *p; 221 { 222 struct ch_softc *ch = chcd.cd_devs[CHUNIT(dev)]; 223 224 SC_DEBUG(ch->sc_link, SDEV_DB1, ("closing\n")); 225 ch->sc_link->flags &= ~SDEV_OPEN; 226 227 return 0; 228 } 229 230 /* 231 * Perform special action on behalf of the user 232 * Knows about the internals of this device 233 */ 234 int 235 chioctl(dev, cmd, arg, mode, p) 236 dev_t dev; 237 u_long cmd; 238 caddr_t arg; 239 int mode; 240 struct proc *p; 241 { 242 struct ch_softc *ch = chcd.cd_devs[CHUNIT(dev)]; 243 struct scsi_link *sc_link = ch->sc_link; 244 int flags; 245 246 /* 247 * Find the device that the user is talking about 248 */ 249 flags = 0; /* give error messages, act on errors etc. */ 250 251 switch (cmd) { 252 case CHIOOP: { 253 struct chop *chop = (struct chop *) arg; 254 SC_DEBUG(sc_link, SDEV_DB2, ("[chtape_chop: %x]\n", 255 chop->ch_op)); 256 257 switch (chop->ch_op) { 258 case CHGETPARAM: 259 chop->u.getparam.chmo = ch->chmo; 260 chop->u.getparam.chms = ch->chms; 261 chop->u.getparam.sloto = ch->sloto; 262 chop->u.getparam.slots = ch->slots; 263 chop->u.getparam.imexo = ch->imexo; 264 chop->u.getparam.imexs = ch->imexs; 265 chop->u.getparam.driveo = ch->driveo; 266 chop->u.getparam.drives = ch->drives; 267 chop->u.getparam.rot = ch->rot; 268 chop->result = 0; 269 return 0; 270 break; 271 case CHPOSITION: 272 return ch_position(ch, &chop->result, 273 chop->u.position.chm, chop->u.position.to, flags); 274 case CHMOVE: 275 return ch_move(ch, &chop->result, chop->u.position.chm, 276 chop->u.move.from, chop->u.move.to, flags); 277 case CHGETELEM: 278 return ch_getelem(ch, &chop->result, 279 chop->u.get_elem_stat.type, 280 chop->u.get_elem_stat.from, 281 (char *) &chop->u.get_elem_stat.elem_data, flags); 282 default: 283 return EINVAL; 284 } 285 } 286 default: 287 return scsi_do_ioctl(sc_link, dev, cmd, arg, mode, p); 288 } 289 #ifdef DIAGNOSTIC 290 panic("chioctl: impossible"); 291 #endif 292 } 293 294 int 295 ch_getelem(ch, stat, type, from, data, flags) 296 struct ch_softc *ch; 297 short *stat; 298 int type, from; 299 char *data; 300 int flags; 301 { 302 struct scsi_read_element_status scsi_cmd; 303 char elbuf[32]; 304 int error; 305 306 bzero(&scsi_cmd, sizeof(scsi_cmd)); 307 scsi_cmd.opcode = READ_ELEMENT_STATUS; 308 scsi_cmd.byte2 = type; 309 scsi_cmd.starting_element_addr[0] = (from >> 8) & 0xff; 310 scsi_cmd.starting_element_addr[1] = from & 0xff; 311 scsi_cmd.number_of_elements[1] = 1; 312 scsi_cmd.allocation_length[2] = 32; 313 314 error = scsi_scsi_cmd(ch->sc_link, (struct scsi_generic *) &scsi_cmd, 315 sizeof(scsi_cmd), (u_char *) elbuf, 32, CHRETRIES, 100000, NULL, 316 SCSI_DATA_IN | flags); 317 if (error) 318 *stat = ch->lsterr; 319 else 320 *stat = 0; 321 bcopy(elbuf + 16, data, 16); 322 return error; 323 } 324 325 int 326 ch_move(ch, stat, chm, from, to, flags) 327 struct ch_softc *ch; 328 short *stat; 329 int chm, from, to, flags; 330 { 331 struct scsi_move_medium scsi_cmd; 332 int error; 333 334 bzero(&scsi_cmd, sizeof(scsi_cmd)); 335 scsi_cmd.opcode = MOVE_MEDIUM; 336 scsi_cmd.transport_element_address[0] = (chm >> 8) & 0xff; 337 scsi_cmd.transport_element_address[1] = chm & 0xff; 338 scsi_cmd.source_address[0] = (from >> 8) & 0xff; 339 scsi_cmd.source_address[1] = from & 0xff; 340 scsi_cmd.destination_address[0] = (to >> 8) & 0xff; 341 scsi_cmd.destination_address[1] = to & 0xff; 342 scsi_cmd.invert = (chm & CH_INVERT) ? 1 : 0; 343 error = scsi_scsi_cmd(ch->sc_link, (struct scsi_generic *) &scsi_cmd, 344 sizeof(scsi_cmd), NULL, 0, CHRETRIES, 100000, NULL, flags); 345 if (error) 346 *stat = ch->lsterr; 347 else 348 *stat = 0; 349 return error; 350 } 351 352 int 353 ch_position(ch, stat, chm, to, flags) 354 struct ch_softc *ch; 355 short *stat; 356 int chm, to, flags; 357 { 358 struct scsi_position_to_element scsi_cmd; 359 int error; 360 361 bzero(&scsi_cmd, sizeof(scsi_cmd)); 362 scsi_cmd.opcode = POSITION_TO_ELEMENT; 363 scsi_cmd.transport_element_address[0] = (chm >> 8) & 0xff; 364 scsi_cmd.transport_element_address[1] = chm & 0xff; 365 scsi_cmd.source_address[0] = (to >> 8) & 0xff; 366 scsi_cmd.source_address[1] = to & 0xff; 367 scsi_cmd.invert = (chm & CH_INVERT) ? 1 : 0; 368 error = scsi_scsi_cmd(ch->sc_link, (struct scsi_generic *) &scsi_cmd, 369 sizeof(scsi_cmd), NULL, 0, CHRETRIES, 100000, NULL, flags); 370 if (error) 371 *stat = ch->lsterr; 372 else 373 *stat = 0; 374 return error; 375 } 376 377 /* 378 * Get the scsi driver to send a full inquiry to the 379 * device and use the results to fill out the global 380 * parameter structure. 381 */ 382 int 383 ch_mode_sense(ch, flags) 384 struct ch_softc *ch; 385 int flags; 386 { 387 struct scsi_mode_sense scsi_cmd; 388 u_char scsi_sense[128]; /* Can't use scsi_mode_sense_data because of 389 * missing block descriptor. 390 */ 391 u_char *b; 392 int i, l; 393 int error; 394 struct scsi_link *sc_link = ch->sc_link; 395 396 /* 397 * First check if we have it all loaded 398 */ 399 if (sc_link->flags & SDEV_MEDIA_LOADED) 400 return 0; 401 402 /* 403 * First do a mode sense 404 */ 405 bzero(&scsi_cmd, sizeof(scsi_cmd)); 406 scsi_cmd.opcode = MODE_SENSE; 407 scsi_cmd.byte2 = SMS_DBD; 408 scsi_cmd.page = 0x3f; /* All Pages */ 409 scsi_cmd.length = sizeof(scsi_sense); 410 411 /* 412 * Read in the pages 413 */ 414 error = scsi_scsi_cmd(sc_link, (struct scsi_generic *) &scsi_cmd, 415 sizeof(scsi_cmd), (u_char *) &scsi_sense, 416 sizeof(scsi_sense), CHRETRIES, 5000, NULL, 417 flags | SCSI_DATA_IN); 418 if (error) { 419 printf("%s: could not mode sense\n", ch->sc_dev.dv_xname); 420 return error; 421 } 422 423 sc_link->flags |= SDEV_MEDIA_LOADED; 424 l = scsi_sense[0] - 3; 425 b = &scsi_sense[4]; 426 427 /* 428 * To avoid alignment problems 429 */ 430 /* XXXX - FIX THIS FOR MSB */ 431 #define p2copy(valp) (valp[1] | (valp[0]<<8)); valp+=2 432 #define p4copy(valp) (valp[3] | (valp[2]<<8) | (valp[1]<<16) | (valp[0]<<24)); valp+=4 433 #if 0 434 printf("\nmode_sense %d\n", l); 435 for (i = 0; i < l + 4; i++) 436 printf("%x%c", scsi_sense[i], i % 8 == 7 ? '\n' : ':'); 437 printf("\n"); 438 #endif 439 for (i = 0; i < l;) { 440 u_char pc = (*b++) & 0x3f; 441 u_char pl = *b++; 442 u_char *bb = b; 443 switch (pc) { 444 case 0x1d: 445 ch->chmo = p2copy(bb); 446 ch->chms = p2copy(bb); 447 ch->sloto = p2copy(bb); 448 ch->slots = p2copy(bb); 449 ch->imexo = p2copy(bb); 450 ch->imexs = p2copy(bb); 451 ch->driveo = p2copy(bb); 452 ch->drives = p2copy(bb); 453 break; 454 case 0x1e: 455 ch->rot = *b & 0x1; 456 break; 457 case 0x1f: 458 ch->stor = *b & 0xf; 459 bb += 2; 460 ch->stor = p4copy(bb); 461 break; 462 default: 463 break; 464 } 465 b += pl; 466 i += pl + 2; 467 } 468 SC_DEBUG(sc_link, SDEV_DB2, 469 (" cht(%d-%d)slot(%d-%d)imex(%d-%d)cts(%d-%d) %s rotate\n", 470 ch->chmo, ch->chms, ch->sloto, ch->slots, ch->imexo, ch->imexs, 471 ch->driveo, ch->drives, ch->rot ? "can" : "can't")); 472 return 0; 473 } 474
Indexes created Thu Sep 25 16:09:42 GMT 2025