ch.c revision 1.14
1 /* $NetBSD: ch.c,v 1.14 1995/01/16 21:31:38 mycroft 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 52 #define CHRETRIES 2 53 54 #define CHMODE(z) (minor(z) & 0x0f) 55 #define CHUNIT(z) (minor(z) >> 4) 56 57 struct ch_softc { 58 struct device sc_dev; 59 60 struct scsi_link *sc_link; /* all the inter level info */ 61 u_int16_t chmo; /* Offset of first CHM */ 62 u_int16_t chms; /* No. of CHM */ 63 u_int16_t slots; /* No. of Storage Elements */ 64 u_int16_t sloto; /* Offset of first SE */ 65 u_int16_t imexs; /* No. of Import/Export Slots */ 66 u_int16_t imexo; /* Offset of first IM/EX */ 67 u_int16_t drives; /* No. of CTS */ 68 u_int16_t driveo; /* Offset of first CTS */ 69 u_int16_t rot; /* CHM can rotate */ 70 u_long op_matrix; /* possible operations */ 71 u_int16_t lsterr; /* details of lasterror */ 72 u_char stor; /* posible Storage locations */ 73 }; 74 75 int chmatch __P((struct device *, void *, void *)); 76 void chattach __P((struct device *, struct device *, void *)); 77 78 struct cfdriver chcd = { 79 NULL, "ch", chmatch, chattach, DV_DULL, sizeof(struct ch_softc) 80 }; 81 82 /* 83 * This driver is so simple it uses all the default services 84 */ 85 struct scsi_device ch_switch = { 86 NULL, 87 NULL, 88 NULL, 89 NULL, 90 }; 91 92 struct scsi_inquiry_pattern ch_patterns[] = { 93 {T_CHANGER, T_REMOV, 94 "", "", ""}, 95 }; 96 97 int 98 chmatch(parent, match, aux) 99 struct device *parent; 100 void *match, *aux; 101 { 102 struct cfdata *cf = match; 103 struct scsibus_attach_args *sa = aux; 104 int priority; 105 106 (void)scsi_inqmatch(sa->sa_inqbuf, 107 (caddr_t)ch_patterns, sizeof(ch_patterns)/sizeof(ch_patterns[0]), 108 sizeof(ch_patterns[0]), &priority); 109 return (priority); 110 } 111 112 /* 113 * The routine called by the low level scsi routine when it discovers 114 * a device suitable for this driver. 115 */ 116 void 117 chattach(parent, self, aux) 118 struct device *parent, *self; 119 void *aux; 120 { 121 struct ch_softc *ch = (void *)self; 122 struct scsibus_attach_args *sa = aux; 123 struct scsi_link *sc_link = sa->sa_sc_link; 124 125 SC_DEBUG(sc_link, SDEV_DB2, ("chattach: ")); 126 127 /* 128 * Store information needed to contact our base driver 129 */ 130 ch->sc_link = sc_link; 131 sc_link->device = &ch_switch; 132 sc_link->device_softc = ch; 133 sc_link->openings = 1; 134 135 /* 136 * Use the subdriver to request information regarding 137 * the drive. We cannot use interrupts yet, so the 138 * request must specify this. 139 */ 140 if (ch_mode_sense(ch, SCSI_AUTOCONF) != 0) 141 printf(": offline\n"); 142 else 143 printf(": %d slot(s), %d drive(s), %d arm(s), %d i/e-slot(s)\n", 144 ch->slots, ch->drives, ch->chms, ch->imexs); 145 } 146 147 /* 148 * open the device. 149 */ 150 int 151 chopen(dev) 152 dev_t dev; 153 { 154 int error = 0; 155 int unit, mode; 156 struct ch_softc *ch; 157 struct scsi_link *sc_link; 158 159 unit = CHUNIT(dev); 160 if (unit >= chcd.cd_ndevs) 161 return ENXIO; 162 ch = chcd.cd_devs[unit]; 163 if (!ch) 164 return ENXIO; 165 166 mode = CHMODE(dev); 167 sc_link = ch->sc_link; 168 169 SC_DEBUG(sc_link, SDEV_DB1, 170 ("chopen: dev=0x%x (unit %d (of %d))\n", dev, unit, chcd.cd_ndevs)); 171 172 /* 173 * Only allow one at a time 174 */ 175 if (sc_link->flags & SDEV_OPEN) { 176 printf("%s: already open\n", ch->sc_dev.dv_xname); 177 return EBUSY; 178 } 179 180 /* 181 * Catch any unit attention errors. 182 */ 183 if (error = scsi_test_unit_ready(sc_link, SCSI_IGNORE_MEDIA_CHANGE)) 184 goto bad; 185 186 sc_link->flags |= SDEV_OPEN; /* unit attn are now errors */ 187 188 /* 189 * Make sure data is loaded 190 */ 191 if (error = ch_mode_sense(ch, 0)) { 192 printf("%s: offline\n", ch->sc_dev.dv_xname); 193 goto bad; 194 } 195 196 SC_DEBUG(sc_link, SDEV_DB3, ("open complete\n")); 197 return 0; 198 199 bad: 200 sc_link->flags &= ~SDEV_OPEN; 201 return error; 202 } 203 204 /* 205 * close the device.. only called if we are the LAST 206 * occurence of an open device 207 */ 208 int 209 chclose(dev) 210 dev_t dev; 211 { 212 struct ch_softc *ch = chcd.cd_devs[CHUNIT(dev)]; 213 214 SC_DEBUG(ch->sc_link, SDEV_DB1, ("closing\n")); 215 ch->sc_link->flags &= ~SDEV_OPEN; 216 217 return 0; 218 } 219 220 /* 221 * Perform special action on behalf of the user 222 * Knows about the internals of this device 223 */ 224 int 225 chioctl(dev, cmd, arg, mode, p) 226 dev_t dev; 227 u_long cmd; 228 caddr_t arg; 229 int mode; 230 struct proc *p; 231 { 232 struct ch_softc *ch = chcd.cd_devs[CHUNIT(dev)]; 233 struct scsi_link *sc_link = ch->sc_link; 234 int number; 235 int flags; 236 237 /* 238 * Find the device that the user is talking about 239 */ 240 flags = 0; /* give error messages, act on errors etc. */ 241 242 switch (cmd) { 243 case CHIOOP: { 244 struct chop *chop = (struct chop *) arg; 245 SC_DEBUG(sc_link, SDEV_DB2, ("[chtape_chop: %x]\n", 246 chop->ch_op)); 247 248 switch (chop->ch_op) { 249 case CHGETPARAM: 250 chop->u.getparam.chmo = ch->chmo; 251 chop->u.getparam.chms = ch->chms; 252 chop->u.getparam.sloto = ch->sloto; 253 chop->u.getparam.slots = ch->slots; 254 chop->u.getparam.imexo = ch->imexo; 255 chop->u.getparam.imexs = ch->imexs; 256 chop->u.getparam.driveo = ch->driveo; 257 chop->u.getparam.drives = ch->drives; 258 chop->u.getparam.rot = ch->rot; 259 chop->result = 0; 260 return 0; 261 break; 262 case CHPOSITION: 263 return ch_position(ch, &chop->result, 264 chop->u.position.chm, chop->u.position.to, flags); 265 case CHMOVE: 266 return ch_move(ch, &chop->result, chop->u.position.chm, 267 chop->u.move.from, chop->u.move.to, flags); 268 case CHGETELEM: 269 return ch_getelem(ch, &chop->result, 270 chop->u.get_elem_stat.type, 271 chop->u.get_elem_stat.from, 272 &chop->u.get_elem_stat.elem_data, flags); 273 default: 274 return EINVAL; 275 } 276 } 277 default: 278 return scsi_do_ioctl(sc_link, dev, cmd, arg, mode, p); 279 } 280 #ifdef DIAGNOSTIC 281 panic("chioctl: impossible"); 282 #endif 283 } 284 285 int 286 ch_getelem(ch, stat, type, from, data, flags) 287 struct ch_softc *ch; 288 short *stat; 289 int type, from; 290 char *data; 291 int flags; 292 { 293 struct scsi_read_element_status scsi_cmd; 294 char elbuf[32]; 295 int error; 296 297 bzero(&scsi_cmd, sizeof(scsi_cmd)); 298 scsi_cmd.opcode = READ_ELEMENT_STATUS; 299 scsi_cmd.byte2 = type; 300 scsi_cmd.starting_element_addr[0] = (from >> 8) & 0xff; 301 scsi_cmd.starting_element_addr[1] = from & 0xff; 302 scsi_cmd.number_of_elements[1] = 1; 303 scsi_cmd.allocation_length[2] = 32; 304 305 error = scsi_scsi_cmd(ch->sc_link, (struct scsi_generic *) &scsi_cmd, 306 sizeof(scsi_cmd), (u_char *) elbuf, 32, CHRETRIES, 100000, NULL, 307 SCSI_DATA_IN | flags); 308 if (error) 309 *stat = ch->lsterr; 310 else 311 *stat = 0; 312 bcopy(elbuf + 16, data, 16); 313 return error; 314 } 315 316 int 317 ch_move(ch, stat, chm, from, to, flags) 318 struct ch_softc *ch; 319 short *stat; 320 int chm, from, to, flags; 321 { 322 struct scsi_move_medium scsi_cmd; 323 int error; 324 325 bzero(&scsi_cmd, sizeof(scsi_cmd)); 326 scsi_cmd.opcode = MOVE_MEDIUM; 327 scsi_cmd.transport_element_address[0] = (chm >> 8) & 0xff; 328 scsi_cmd.transport_element_address[1] = chm & 0xff; 329 scsi_cmd.source_address[0] = (from >> 8) & 0xff; 330 scsi_cmd.source_address[1] = from & 0xff; 331 scsi_cmd.destination_address[0] = (to >> 8) & 0xff; 332 scsi_cmd.destination_address[1] = to & 0xff; 333 scsi_cmd.invert = (chm & CH_INVERT) ? 1 : 0; 334 error = scsi_scsi_cmd(ch->sc_link, (struct scsi_generic *) &scsi_cmd, 335 sizeof(scsi_cmd), NULL, 0, CHRETRIES, 100000, NULL, flags); 336 if (error) 337 *stat = ch->lsterr; 338 else 339 *stat = 0; 340 return error; 341 } 342 343 int 344 ch_position(ch, stat, chm, to, flags) 345 struct ch_softc *ch; 346 short *stat; 347 int chm, to, flags; 348 { 349 struct scsi_position_to_element scsi_cmd; 350 int error; 351 352 bzero(&scsi_cmd, sizeof(scsi_cmd)); 353 scsi_cmd.opcode = POSITION_TO_ELEMENT; 354 scsi_cmd.transport_element_address[0] = (chm >> 8) & 0xff; 355 scsi_cmd.transport_element_address[1] = chm & 0xff; 356 scsi_cmd.source_address[0] = (to >> 8) & 0xff; 357 scsi_cmd.source_address[1] = to & 0xff; 358 scsi_cmd.invert = (chm & CH_INVERT) ? 1 : 0; 359 error = scsi_scsi_cmd(ch->sc_link, (struct scsi_generic *) &scsi_cmd, 360 sizeof(scsi_cmd), NULL, 0, CHRETRIES, 100000, NULL, flags); 361 if (error) 362 *stat = ch->lsterr; 363 else 364 *stat = 0; 365 return error; 366 } 367 368 /* 369 * Get the scsi driver to send a full inquiry to the 370 * device and use the results to fill out the global 371 * parameter structure. 372 */ 373 int 374 ch_mode_sense(ch, flags) 375 struct ch_softc *ch; 376 int flags; 377 { 378 struct scsi_mode_sense scsi_cmd; 379 u_char scsi_sense[128]; /* Can't use scsi_mode_sense_data because of 380 * missing block descriptor. 381 */ 382 u_char *b; 383 int i, l; 384 int error; 385 struct scsi_link *sc_link = ch->sc_link; 386 387 /* 388 * First check if we have it all loaded 389 */ 390 if (sc_link->flags & SDEV_MEDIA_LOADED) 391 return 0; 392 393 /* 394 * First do a mode sense 395 */ 396 bzero(&scsi_cmd, sizeof(scsi_cmd)); 397 scsi_cmd.opcode = MODE_SENSE; 398 scsi_cmd.byte2 = SMS_DBD; 399 scsi_cmd.page = 0x3f; /* All Pages */ 400 scsi_cmd.length = sizeof(scsi_sense); 401 402 /* 403 * Read in the pages 404 */ 405 if (error = scsi_scsi_cmd(sc_link, (struct scsi_generic *) &scsi_cmd, 406 sizeof(scsi_cmd), (u_char *) &scsi_sense, sizeof(scsi_sense), 407 CHRETRIES, 5000, NULL, flags | SCSI_DATA_IN)) { 408 printf("%s: could not mode sense\n", ch->sc_dev.dv_xname); 409 return error; 410 } 411 412 sc_link->flags |= SDEV_MEDIA_LOADED; 413 l = scsi_sense[0] - 3; 414 b = &scsi_sense[4]; 415 416 /* 417 * To avoid alignment problems 418 */ 419 /* XXXX - FIX THIS FOR MSB */ 420 #define p2copy(valp) (valp[1] | (valp[0]<<8)); valp+=2 421 #define p4copy(valp) (valp[3] | (valp[2]<<8) | (valp[1]<<16) | (valp[0]<<24)); valp+=4 422 #if 0 423 printf("\nmode_sense %d\n", l); 424 for (i = 0; i < l + 4; i++) 425 printf("%x%c", scsi_sense[i], i % 8 == 7 ? '\n' : ':'); 426 printf("\n"); 427 #endif 428 for (i = 0; i < l;) { 429 u_char pc = (*b++) & 0x3f; 430 u_char pl = *b++; 431 u_char *bb = b; 432 switch (pc) { 433 case 0x1d: 434 ch->chmo = p2copy(bb); 435 ch->chms = p2copy(bb); 436 ch->sloto = p2copy(bb); 437 ch->slots = p2copy(bb); 438 ch->imexo = p2copy(bb); 439 ch->imexs = p2copy(bb); 440 ch->driveo = p2copy(bb); 441 ch->drives = p2copy(bb); 442 break; 443 case 0x1e: 444 ch->rot = *b & 0x1; 445 break; 446 case 0x1f: 447 ch->stor = *b & 0xf; 448 bb += 2; 449 ch->stor = p4copy(bb); 450 break; 451 default: 452 break; 453 } 454 b += pl; 455 i += pl + 2; 456 } 457 SC_DEBUG(sc_link, SDEV_DB2, 458 (" cht(%d-%d)slot(%d-%d)imex(%d-%d)cts(%d-%d) %s rotate\n", 459 ch->chmo, ch->chms, ch->sloto, ch->slots, ch->imexo, ch->imexs, 460 ch->driveo, ch->drives, ch->rot ? "can" : "can't")); 461 return 0; 462 } 463
Indexes created Mon Sep 29 21:09:56 GMT 2025