1 /* 2 * SCSI Media Changer device driver for Linux 2.6 3 * 4 * (c) 1996-2003 Gerd Knorr <kraxel@bytesex.org> 5 * 6 */ 7 8 #define VERSION "0.25" 9 10 #include <linux/config.h> 11 #include <linux/module.h> 12 #include <linux/init.h> 13 #include <linux/fs.h> 14 #include <linux/kernel.h> 15 #include <linux/sched.h> 16 #include <linux/mm.h> 17 #include <linux/major.h> 18 #include <linux/string.h> 19 #include <linux/errno.h> 20 #include <linux/interrupt.h> 21 #include <linux/blkdev.h> 22 #include <linux/completion.h> 23 #include <linux/ioctl32.h> 24 #include <linux/compat.h> 25 #include <linux/chio.h> /* here are all the ioctls */ 26 27 #include <scsi/scsi.h> 28 #include <scsi/scsi_cmnd.h> 29 #include <scsi/scsi_driver.h> 30 #include <scsi/scsi_ioctl.h> 31 #include <scsi/scsi_host.h> 32 #include <scsi/scsi_device.h> 33 #include <scsi/scsi_eh.h> 34 #include <scsi/scsi_dbg.h> 35 36 #define CH_DT_MAX 16 37 #define CH_TYPES 8 38 39 MODULE_DESCRIPTION("device driver for scsi media changer devices"); 40 MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org>"); 41 MODULE_LICENSE("GPL"); 42 43 static int init = 1; 44 module_param(init, int, 0444); 45 MODULE_PARM_DESC(init, \ 46 "initialize element status on driver load (default: on)"); 47 48 static int timeout_move = 300; 49 module_param(timeout_move, int, 0644); 50 MODULE_PARM_DESC(timeout_move,"timeout for move commands " 51 "(default: 300 seconds)"); 52 53 static int timeout_init = 3600; 54 module_param(timeout_init, int, 0644); 55 MODULE_PARM_DESC(timeout_init,"timeout for INITIALIZE ELEMENT STATUS " 56 "(default: 3600 seconds)"); 57 58 static int verbose = 1; 59 module_param(verbose, int, 0644); 60 MODULE_PARM_DESC(verbose,"be verbose (default: on)"); 61 62 static int debug = 0; 63 module_param(debug, int, 0644); 64 MODULE_PARM_DESC(debug,"enable/disable debug messages, also prints more " 65 "detailed sense codes on scsi errors (default: off)"); 66 67 static int dt_id[CH_DT_MAX] = { [ 0 ... (CH_DT_MAX-1) ] = -1 }; 68 static int dt_lun[CH_DT_MAX]; 69 module_param_array(dt_id, int, NULL, 0444); 70 module_param_array(dt_lun, int, NULL, 0444); 71 72 /* tell the driver about vendor-specific slots */ 73 static int vendor_firsts[CH_TYPES-4]; 74 static int vendor_counts[CH_TYPES-4]; 75 module_param_array(vendor_firsts, int, NULL, 0444); 76 module_param_array(vendor_counts, int, NULL, 0444); 77 78 static char *vendor_labels[CH_TYPES-4] = { 79 "v0", "v1", "v2", "v3" 80 }; 81 // module_param_string_array(vendor_labels, NULL, 0444); 82 83 #define dprintk(fmt, arg...) if (debug) \ 84 printk(KERN_DEBUG "%s: " fmt, ch->name , ## arg) 85 #define vprintk(fmt, arg...) if (verbose) \ 86 printk(KERN_INFO "%s: " fmt, ch->name , ## arg) 87 88 /* ------------------------------------------------------------------- */ 89 90 #define MAX_RETRIES 1 91 92 static int ch_probe(struct device *); 93 static int ch_remove(struct device *); 94 static int ch_open(struct inode * inode, struct file * filp); 95 static int ch_release(struct inode * inode, struct file * filp); 96 static int ch_ioctl(struct inode * inode, struct file * filp, 97 unsigned int cmd, unsigned long arg); 98 #ifdef CONFIG_COMPAT 99 static long ch_ioctl_compat(struct file * filp, 100 unsigned int cmd, unsigned long arg); 101 #endif 102 103 static struct class * ch_sysfs_class; 104 105 typedef struct { 106 struct list_head list; 107 int minor; 108 char name[8]; 109 struct scsi_device *device; 110 struct scsi_device **dt; /* ptrs to data transfer elements */ 111 u_int firsts[CH_TYPES]; 112 u_int counts[CH_TYPES]; 113 u_int unit_attention; 114 u_int voltags; 115 struct semaphore lock; 116 } scsi_changer; 117 118 static LIST_HEAD(ch_devlist); 119 static spinlock_t ch_devlist_lock = SPIN_LOCK_UNLOCKED; 120 static int ch_devcount; 121 122 static struct scsi_driver ch_template = 123 { 124 .owner = THIS_MODULE, 125 .gendrv = { 126 .name = "ch", 127 .probe = ch_probe, 128 .remove = ch_remove, 129 }, 130 }; 131 132 static struct file_operations changer_fops = 133 { 134 .owner = THIS_MODULE, 135 .open = ch_open, 136 .release = ch_release, 137 .ioctl = ch_ioctl, 138 #ifdef CONFIG_COMPAT 139 .compat_ioctl = ch_ioctl_compat, 140 #endif 141 }; 142 143 static struct { 144 unsigned char sense; 145 unsigned char asc; 146 unsigned char ascq; 147 int errno; 148 } err[] = { 149 /* Just filled in what looks right. Hav'nt checked any standard paper for 150 these errno assignments, so they may be wrong... */ 151 { 152 .sense = ILLEGAL_REQUEST, 153 .asc = 0x21, 154 .ascq = 0x01, 155 .errno = EBADSLT, /* Invalid element address */ 156 },{ 157 .sense = ILLEGAL_REQUEST, 158 .asc = 0x28, 159 .ascq = 0x01, 160 .errno = EBADE, /* Import or export element accessed */ 161 },{ 162 .sense = ILLEGAL_REQUEST, 163 .asc = 0x3B, 164 .ascq = 0x0D, 165 .errno = EXFULL, /* Medium destination element full */ 166 },{ 167 .sense = ILLEGAL_REQUEST, 168 .asc = 0x3B, 169 .ascq = 0x0E, 170 .errno = EBADE, /* Medium source element empty */ 171 },{ 172 .sense = ILLEGAL_REQUEST, 173 .asc = 0x20, 174 .ascq = 0x00, 175 .errno = EBADRQC, /* Invalid command operation code */ 176 },{ 177 /* end of list */ 178 } 179 }; 180 181 /* ------------------------------------------------------------------- */ 182 183 static int ch_find_errno(struct scsi_sense_hdr *sshdr) 184 { 185 int i,errno = 0; 186 187 /* Check to see if additional sense information is available */ 188 if (scsi_sense_valid(sshdr) && 189 sshdr->asc != 0) { 190 for (i = 0; err[i].errno != 0; i++) { 191 if (err[i].sense == sshdr->sense_key && 192 err[i].asc == sshdr->asc && 193 err[i].ascq == sshdr->ascq) { 194 errno = -err[i].errno; 195 break; 196 } 197 } 198 } 199 if (errno == 0) 200 errno = -EIO; 201 return errno; 202 } 203 204 static int 205 ch_do_scsi(scsi_changer *ch, unsigned char *cmd, 206 void *buffer, unsigned buflength, 207 enum dma_data_direction direction) 208 { 209 int errno, retries = 0, timeout, result; 210 struct scsi_sense_hdr sshdr; 211 212 timeout = (cmd[0] == INITIALIZE_ELEMENT_STATUS) 213 ? timeout_init : timeout_move; 214 215 retry: 216 errno = 0; 217 if (debug) { 218 dprintk("command: "); 219 __scsi_print_command(cmd); 220 } 221 222 result = scsi_execute_req(ch->device, cmd, direction, buffer, 223 buflength, &sshdr, timeout * HZ, 224 MAX_RETRIES); 225 226 dprintk("result: 0x%x\n",result); 227 if (driver_byte(result) & DRIVER_SENSE) { 228 if (debug) 229 scsi_print_sense_hdr(ch->name, &sshdr); 230 errno = ch_find_errno(&sshdr); 231 232 switch(sshdr.sense_key) { 233 case UNIT_ATTENTION: 234 ch->unit_attention = 1; 235 if (retries++ < 3) 236 goto retry; 237 break; 238 } 239 } 240 return errno; 241 } 242 243 /* ------------------------------------------------------------------------ */ 244 245 static int 246 ch_elem_to_typecode(scsi_changer *ch, u_int elem) 247 { 248 int i; 249 250 for (i = 0; i < CH_TYPES; i++) { 251 if (elem >= ch->firsts[i] && 252 elem < ch->firsts[i] + 253 ch->counts[i]) 254 return i+1; 255 } 256 return 0; 257 } 258 259 static int 260 ch_read_element_status(scsi_changer *ch, u_int elem, char *data) 261 { 262 u_char cmd[12]; 263 u_char *buffer; 264 int result; 265 266 buffer = kmalloc(512, GFP_KERNEL | GFP_DMA); 267 if(!buffer) 268 return -ENOMEM; 269 270 retry: 271 memset(cmd,0,sizeof(cmd)); 272 cmd[0] = READ_ELEMENT_STATUS; 273 cmd[1] = (ch->device->lun << 5) | 274 (ch->voltags ? 0x10 : 0) | 275 ch_elem_to_typecode(ch,elem); 276 cmd[2] = (elem >> 8) & 0xff; 277 cmd[3] = elem & 0xff; 278 cmd[5] = 1; 279 cmd[9] = 255; 280 if (0 == (result = ch_do_scsi(ch, cmd, buffer, 256, DMA_FROM_DEVICE))) { 281 if (((buffer[16] << 8) | buffer[17]) != elem) { 282 dprintk("asked for element 0x%02x, got 0x%02x\n", 283 elem,(buffer[16] << 8) | buffer[17]); 284 kfree(buffer); 285 return -EIO; 286 } 287 memcpy(data,buffer+16,16); 288 } else { 289 if (ch->voltags) { 290 ch->voltags = 0; 291 vprintk("device has no volume tag support\n"); 292 goto retry; 293 } 294 dprintk("READ ELEMENT STATUS for element 0x%x failed\n",elem); 295 } 296 kfree(buffer); 297 return result; 298 } 299 300 static int 301 ch_init_elem(scsi_changer *ch) 302 { 303 int err; 304 u_char cmd[6]; 305 306 vprintk("INITIALIZE ELEMENT STATUS, may take some time ...\n"); 307 memset(cmd,0,sizeof(cmd)); 308 cmd[0] = INITIALIZE_ELEMENT_STATUS; 309 cmd[1] = ch->device->lun << 5; 310 err = ch_do_scsi(ch, cmd, NULL, 0, DMA_NONE); 311 vprintk("... finished\n"); 312 return err; 313 } 314 315 static int 316 ch_readconfig(scsi_changer *ch) 317 { 318 u_char cmd[10], data[16]; 319 u_char *buffer; 320 int result,id,lun,i; 321 u_int elem; 322 323 buffer = kmalloc(512, GFP_KERNEL | GFP_DMA); 324 if (!buffer) 325 return -ENOMEM; 326 memset(buffer,0,512); 327 328 memset(cmd,0,sizeof(cmd)); 329 cmd[0] = MODE_SENSE; 330 cmd[1] = ch->device->lun << 5; 331 cmd[2] = 0x1d; 332 cmd[4] = 255; 333 result = ch_do_scsi(ch, cmd, buffer, 255, DMA_FROM_DEVICE); 334 if (0 != result) { 335 cmd[1] |= (1<<3); 336 result = ch_do_scsi(ch, cmd, buffer, 255, DMA_FROM_DEVICE); 337 } 338 if (0 == result) { 339 ch->firsts[CHET_MT] = 340 (buffer[buffer[3]+ 6] << 8) | buffer[buffer[3]+ 7]; 341 ch->counts[CHET_MT] = 342 (buffer[buffer[3]+ 8] << 8) | buffer[buffer[3]+ 9]; 343 ch->firsts[CHET_ST] = 344 (buffer[buffer[3]+10] << 8) | buffer[buffer[3]+11]; 345 ch->counts[CHET_ST] = 346 (buffer[buffer[3]+12] << 8) | buffer[buffer[3]+13]; 347 ch->firsts[CHET_IE] = 348 (buffer[buffer[3]+14] << 8) | buffer[buffer[3]+15]; 349 ch->counts[CHET_IE] = 350 (buffer[buffer[3]+16] << 8) | buffer[buffer[3]+17]; 351 ch->firsts[CHET_DT] = 352 (buffer[buffer[3]+18] << 8) | buffer[buffer[3]+19]; 353 ch->counts[CHET_DT] = 354 (buffer[buffer[3]+20] << 8) | buffer[buffer[3]+21]; 355 vprintk("type #1 (mt): 0x%x+%d [medium transport]\n", 356 ch->firsts[CHET_MT], 357 ch->counts[CHET_MT]); 358 vprintk("type #2 (st): 0x%x+%d [storage]\n", 359 ch->firsts[CHET_ST], 360 ch->counts[CHET_ST]); 361 vprintk("type #3 (ie): 0x%x+%d [import/export]\n", 362 ch->firsts[CHET_IE], 363 ch->counts[CHET_IE]); 364 vprintk("type #4 (dt): 0x%x+%d [data transfer]\n", 365 ch->firsts[CHET_DT], 366 ch->counts[CHET_DT]); 367 } else { 368 vprintk("reading element address assigment page failed!\n"); 369 } 370 371 /* vendor specific element types */ 372 for (i = 0; i < 4; i++) { 373 if (0 == vendor_counts[i]) 374 continue; 375 if (NULL == vendor_labels[i]) 376 continue; 377 ch->firsts[CHET_V1+i] = vendor_firsts[i]; 378 ch->counts[CHET_V1+i] = vendor_counts[i]; 379 vprintk("type #%d (v%d): 0x%x+%d [%s, vendor specific]\n", 380 i+5,i+1,vendor_firsts[i],vendor_counts[i], 381 vendor_labels[i]); 382 } 383 384 /* look up the devices of the data transfer elements */ 385 ch->dt = kmalloc(ch->counts[CHET_DT]*sizeof(struct scsi_device), 386 GFP_KERNEL); 387 for (elem = 0; elem < ch->counts[CHET_DT]; elem++) { 388 id = -1; 389 lun = 0; 390 if (elem < CH_DT_MAX && -1 != dt_id[elem]) { 391 id = dt_id[elem]; 392 lun = dt_lun[elem]; 393 vprintk("dt 0x%x: [insmod option] ", 394 elem+ch->firsts[CHET_DT]); 395 } else if (0 != ch_read_element_status 396 (ch,elem+ch->firsts[CHET_DT],data)) { 397 vprintk("dt 0x%x: READ ELEMENT STATUS failed\n", 398 elem+ch->firsts[CHET_DT]); 399 } else { 400 vprintk("dt 0x%x: ",elem+ch->firsts[CHET_DT]); 401 if (data[6] & 0x80) { 402 if (verbose) 403 printk("not this SCSI bus\n"); 404 ch->dt[elem] = NULL; 405 } else if (0 == (data[6] & 0x30)) { 406 if (verbose) 407 printk("ID/LUN unknown\n"); 408 ch->dt[elem] = NULL; 409 } else { 410 id = ch->device->id; 411 lun = 0; 412 if (data[6] & 0x20) id = data[7]; 413 if (data[6] & 0x10) lun = data[6] & 7; 414 } 415 } 416 if (-1 != id) { 417 if (verbose) 418 printk("ID %i, LUN %i, ",id,lun); 419 ch->dt[elem] = 420 scsi_device_lookup(ch->device->host, 421 ch->device->channel, 422 id,lun); 423 if (!ch->dt[elem]) { 424 /* should not happen */ 425 if (verbose) 426 printk("Huh? device not found!\n"); 427 } else { 428 if (verbose) 429 printk("name: %8.8s %16.16s %4.4s\n", 430 ch->dt[elem]->vendor, 431 ch->dt[elem]->model, 432 ch->dt[elem]->rev); 433 } 434 } 435 } 436 ch->voltags = 1; 437 kfree(buffer); 438 439 return 0; 440 } 441 442 /* ------------------------------------------------------------------------ */ 443 444 static int 445 ch_position(scsi_changer *ch, u_int trans, u_int elem, int rotate) 446 { 447 u_char cmd[10]; 448 449 dprintk("position: 0x%x\n",elem); 450 if (0 == trans) 451 trans = ch->firsts[CHET_MT]; 452 memset(cmd,0,sizeof(cmd)); 453 cmd[0] = POSITION_TO_ELEMENT; 454 cmd[1] = ch->device->lun << 5; 455 cmd[2] = (trans >> 8) & 0xff; 456 cmd[3] = trans & 0xff; 457 cmd[4] = (elem >> 8) & 0xff; 458 cmd[5] = elem & 0xff; 459 cmd[8] = rotate ? 1 : 0; 460 return ch_do_scsi(ch, cmd, NULL, 0, DMA_NONE); 461 } 462 463 static int 464 ch_move(scsi_changer *ch, u_int trans, u_int src, u_int dest, int rotate) 465 { 466 u_char cmd[12]; 467 468 dprintk("move: 0x%x => 0x%x\n",src,dest); 469 if (0 == trans) 470 trans = ch->firsts[CHET_MT]; 471 memset(cmd,0,sizeof(cmd)); 472 cmd[0] = MOVE_MEDIUM; 473 cmd[1] = ch->device->lun << 5; 474 cmd[2] = (trans >> 8) & 0xff; 475 cmd[3] = trans & 0xff; 476 cmd[4] = (src >> 8) & 0xff; 477 cmd[5] = src & 0xff; 478 cmd[6] = (dest >> 8) & 0xff; 479 cmd[7] = dest & 0xff; 480 cmd[10] = rotate ? 1 : 0; 481 return ch_do_scsi(ch, cmd, NULL,0, DMA_NONE); 482 } 483 484 static int 485 ch_exchange(scsi_changer *ch, u_int trans, u_int src, 486 u_int dest1, u_int dest2, int rotate1, int rotate2) 487 { 488 u_char cmd[12]; 489 490 dprintk("exchange: 0x%x => 0x%x => 0x%x\n", 491 src,dest1,dest2); 492 if (0 == trans) 493 trans = ch->firsts[CHET_MT]; 494 memset(cmd,0,sizeof(cmd)); 495 cmd[0] = EXCHANGE_MEDIUM; 496 cmd[1] = ch->device->lun << 5; 497 cmd[2] = (trans >> 8) & 0xff; 498 cmd[3] = trans & 0xff; 499 cmd[4] = (src >> 8) & 0xff; 500 cmd[5] = src & 0xff; 501 cmd[6] = (dest1 >> 8) & 0xff; 502 cmd[7] = dest1 & 0xff; 503 cmd[8] = (dest2 >> 8) & 0xff; 504 cmd[9] = dest2 & 0xff; 505 cmd[10] = (rotate1 ? 1 : 0) | (rotate2 ? 2 : 0); 506 507 return ch_do_scsi(ch, cmd, NULL,0, DMA_NONE); 508 } 509 510 static void 511 ch_check_voltag(char *tag) 512 { 513 int i; 514 515 for (i = 0; i < 32; i++) { 516 /* restrict to ascii */ 517 if (tag[i] >= 0x7f || tag[i] < 0x20) 518 tag[i] = ' '; 519 /* don't allow search wildcards */ 520 if (tag[i] == '?' || 521 tag[i] == '*') 522 tag[i] = ' '; 523 } 524 } 525 526 static int 527 ch_set_voltag(scsi_changer *ch, u_int elem, 528 int alternate, int clear, u_char *tag) 529 { 530 u_char cmd[12]; 531 u_char *buffer; 532 int result; 533 534 buffer = kmalloc(512, GFP_KERNEL); 535 if (!buffer) 536 return -ENOMEM; 537 memset(buffer,0,512); 538 539 dprintk("%s %s voltag: 0x%x => \"%s\"\n", 540 clear ? "clear" : "set", 541 alternate ? "alternate" : "primary", 542 elem, tag); 543 memset(cmd,0,sizeof(cmd)); 544 cmd[0] = SEND_VOLUME_TAG; 545 cmd[1] = (ch->device->lun << 5) | 546 ch_elem_to_typecode(ch,elem); 547 cmd[2] = (elem >> 8) & 0xff; 548 cmd[3] = elem & 0xff; 549 cmd[5] = clear 550 ? (alternate ? 0x0d : 0x0c) 551 : (alternate ? 0x0b : 0x0a); 552 553 cmd[9] = 255; 554 555 memcpy(buffer,tag,32); 556 ch_check_voltag(buffer); 557 558 result = ch_do_scsi(ch, cmd, buffer, 256, DMA_TO_DEVICE); 559 kfree(buffer); 560 return result; 561 } 562 563 static int ch_gstatus(scsi_changer *ch, int type, unsigned char *dest) 564 { 565 int retval = 0; 566 u_char data[16]; 567 unsigned int i; 568 569 down(&ch->lock); 570 for (i = 0; i < ch->counts[type]; i++) { 571 if (0 != ch_read_element_status 572 (ch, ch->firsts[type]+i,data)) { 573 retval = -EIO; 574 break; 575 } 576 put_user(data[2], dest+i); 577 if (data[2] & CESTATUS_EXCEPT) 578 vprintk("element 0x%x: asc=0x%x, ascq=0x%x\n", 579 ch->firsts[type]+i, 580 (int)data[4],(int)data[5]); 581 retval = ch_read_element_status 582 (ch, ch->firsts[type]+i,data); 583 if (0 != retval) 584 break; 585 } 586 up(&ch->lock); 587 return retval; 588 } 589 590 /* ------------------------------------------------------------------------ */ 591 592 static int 593 ch_release(struct inode *inode, struct file *file) 594 { 595 scsi_changer *ch = file->private_data; 596 597 scsi_device_put(ch->device); 598 file->private_data = NULL; 599 return 0; 600 } 601 602 static int 603 ch_open(struct inode *inode, struct file *file) 604 { 605 scsi_changer *tmp, *ch; 606 int minor = iminor(inode); 607 608 spin_lock(&ch_devlist_lock); 609 ch = NULL; 610 list_for_each_entry(tmp,&ch_devlist,list) { 611 if (tmp->minor == minor) 612 ch = tmp; 613 } 614 if (NULL == ch || scsi_device_get(ch->device)) { 615 spin_unlock(&ch_devlist_lock); 616 return -ENXIO; 617 } 618 spin_unlock(&ch_devlist_lock); 619 620 file->private_data = ch; 621 return 0; 622 } 623 624 static int 625 ch_checkrange(scsi_changer *ch, unsigned int type, unsigned int unit) 626 { 627 if (type >= CH_TYPES || unit >= ch->counts[type]) 628 return -1; 629 return 0; 630 } 631 632 static int ch_ioctl(struct inode * inode, struct file * file, 633 unsigned int cmd, unsigned long arg) 634 { 635 scsi_changer *ch = file->private_data; 636 int retval; 637 638 switch (cmd) { 639 case CHIOGPARAMS: 640 { 641 struct changer_params params; 642 643 params.cp_curpicker = 0; 644 params.cp_npickers = ch->counts[CHET_MT]; 645 params.cp_nslots = ch->counts[CHET_ST]; 646 params.cp_nportals = ch->counts[CHET_IE]; 647 params.cp_ndrives = ch->counts[CHET_DT]; 648 649 if (copy_to_user((void *) arg, ¶ms, sizeof(params))) 650 return -EFAULT; 651 return 0; 652 } 653 case CHIOGVPARAMS: 654 { 655 struct changer_vendor_params vparams; 656 657 memset(&vparams,0,sizeof(vparams)); 658 if (ch->counts[CHET_V1]) { 659 vparams.cvp_n1 = ch->counts[CHET_V1]; 660 strncpy(vparams.cvp_label1,vendor_labels[0],16); 661 } 662 if (ch->counts[CHET_V2]) { 663 vparams.cvp_n2 = ch->counts[CHET_V2]; 664 strncpy(vparams.cvp_label2,vendor_labels[1],16); 665 } 666 if (ch->counts[CHET_V3]) { 667 vparams.cvp_n3 = ch->counts[CHET_V3]; 668 strncpy(vparams.cvp_label3,vendor_labels[2],16); 669 } 670 if (ch->counts[CHET_V4]) { 671 vparams.cvp_n4 = ch->counts[CHET_V4]; 672 strncpy(vparams.cvp_label4,vendor_labels[3],16); 673 } 674 if (copy_to_user((void *) arg, &vparams, sizeof(vparams))) 675 return -EFAULT; 676 return 0; 677 } 678 679 case CHIOPOSITION: 680 { 681 struct changer_position pos; 682 683 if (copy_from_user(&pos, (void*)arg, sizeof (pos))) 684 return -EFAULT; 685 686 if (0 != ch_checkrange(ch, pos.cp_type, pos.cp_unit)) { 687 dprintk("CHIOPOSITION: invalid parameter\n"); 688 return -EBADSLT; 689 } 690 down(&ch->lock); 691 retval = ch_position(ch,0, 692 ch->firsts[pos.cp_type] + pos.cp_unit, 693 pos.cp_flags & CP_INVERT); 694 up(&ch->lock); 695 return retval; 696 } 697 698 case CHIOMOVE: 699 { 700 struct changer_move mv; 701 702 if (copy_from_user(&mv, (void*)arg, sizeof (mv))) 703 return -EFAULT; 704 705 if (0 != ch_checkrange(ch, mv.cm_fromtype, mv.cm_fromunit) || 706 0 != ch_checkrange(ch, mv.cm_totype, mv.cm_tounit )) { 707 dprintk("CHIOMOVE: invalid parameter\n"); 708 return -EBADSLT; 709 } 710 711 down(&ch->lock); 712 retval = ch_move(ch,0, 713 ch->firsts[mv.cm_fromtype] + mv.cm_fromunit, 714 ch->firsts[mv.cm_totype] + mv.cm_tounit, 715 mv.cm_flags & CM_INVERT); 716 up(&ch->lock); 717 return retval; 718 } 719 720 case CHIOEXCHANGE: 721 { 722 struct changer_exchange mv; 723 724 if (copy_from_user(&mv, (void*)arg, sizeof (mv))) 725 return -EFAULT; 726 727 if (0 != ch_checkrange(ch, mv.ce_srctype, mv.ce_srcunit ) || 728 0 != ch_checkrange(ch, mv.ce_fdsttype, mv.ce_fdstunit) || 729 0 != ch_checkrange(ch, mv.ce_sdsttype, mv.ce_sdstunit)) { 730 dprintk("CHIOEXCHANGE: invalid parameter\n"); 731 return -EBADSLT; 732 } 733 734 down(&ch->lock); 735 retval = ch_exchange 736 (ch,0, 737 ch->firsts[mv.ce_srctype] + mv.ce_srcunit, 738 ch->firsts[mv.ce_fdsttype] + mv.ce_fdstunit, 739 ch->firsts[mv.ce_sdsttype] + mv.ce_sdstunit, 740 mv.ce_flags & CE_INVERT1, mv.ce_flags & CE_INVERT2); 741 up(&ch->lock); 742 return retval; 743 } 744 745 case CHIOGSTATUS: 746 { 747 struct changer_element_status ces; 748 749 if (copy_from_user(&ces, (void*)arg, sizeof (ces))) 750 return -EFAULT; 751 if (ces.ces_type < 0 || ces.ces_type >= CH_TYPES) 752 return -EINVAL; 753 754 return ch_gstatus(ch, ces.ces_type, ces.ces_data); 755 } 756 757 case CHIOGELEM: 758 { 759 struct changer_get_element cge; 760 u_char cmd[12]; 761 u_char *buffer; 762 unsigned int elem; 763 int result,i; 764 765 if (copy_from_user(&cge, (void*)arg, sizeof (cge))) 766 return -EFAULT; 767 768 if (0 != ch_checkrange(ch, cge.cge_type, cge.cge_unit)) 769 return -EINVAL; 770 elem = ch->firsts[cge.cge_type] + cge.cge_unit; 771 772 buffer = kmalloc(512, GFP_KERNEL | GFP_DMA); 773 if (!buffer) 774 return -ENOMEM; 775 down(&ch->lock); 776 777 voltag_retry: 778 memset(cmd,0,sizeof(cmd)); 779 cmd[0] = READ_ELEMENT_STATUS; 780 cmd[1] = (ch->device->lun << 5) | 781 (ch->voltags ? 0x10 : 0) | 782 ch_elem_to_typecode(ch,elem); 783 cmd[2] = (elem >> 8) & 0xff; 784 cmd[3] = elem & 0xff; 785 cmd[5] = 1; 786 cmd[9] = 255; 787 788 if (0 == (result = ch_do_scsi(ch, cmd, buffer, 256, DMA_FROM_DEVICE))) { 789 cge.cge_status = buffer[18]; 790 cge.cge_flags = 0; 791 if (buffer[18] & CESTATUS_EXCEPT) { 792 cge.cge_errno = EIO; 793 } 794 if (buffer[25] & 0x80) { 795 cge.cge_flags |= CGE_SRC; 796 if (buffer[25] & 0x40) 797 cge.cge_flags |= CGE_INVERT; 798 elem = (buffer[26]<<8) | buffer[27]; 799 for (i = 0; i < 4; i++) { 800 if (elem >= ch->firsts[i] && 801 elem < ch->firsts[i] + ch->counts[i]) { 802 cge.cge_srctype = i; 803 cge.cge_srcunit = elem-ch->firsts[i]; 804 } 805 } 806 } 807 if ((buffer[22] & 0x30) == 0x30) { 808 cge.cge_flags |= CGE_IDLUN; 809 cge.cge_id = buffer[23]; 810 cge.cge_lun = buffer[22] & 7; 811 } 812 if (buffer[9] & 0x80) { 813 cge.cge_flags |= CGE_PVOLTAG; 814 memcpy(cge.cge_pvoltag,buffer+28,36); 815 } 816 if (buffer[9] & 0x40) { 817 cge.cge_flags |= CGE_AVOLTAG; 818 memcpy(cge.cge_avoltag,buffer+64,36); 819 } 820 } else if (ch->voltags) { 821 ch->voltags = 0; 822 vprintk("device has no volume tag support\n"); 823 goto voltag_retry; 824 } 825 kfree(buffer); 826 up(&ch->lock); 827 828 if (copy_to_user((void*)arg, &cge, sizeof (cge))) 829 return -EFAULT; 830 return result; 831 } 832 833 case CHIOINITELEM: 834 { 835 down(&ch->lock); 836 retval = ch_init_elem(ch); 837 up(&ch->lock); 838 return retval; 839 } 840 841 case CHIOSVOLTAG: 842 { 843 struct changer_set_voltag csv; 844 int elem; 845 846 if (copy_from_user(&csv, (void*)arg, sizeof(csv))) 847 return -EFAULT; 848 849 if (0 != ch_checkrange(ch, csv.csv_type, csv.csv_unit)) { 850 dprintk("CHIOSVOLTAG: invalid parameter\n"); 851 return -EBADSLT; 852 } 853 elem = ch->firsts[csv.csv_type] + csv.csv_unit; 854 down(&ch->lock); 855 retval = ch_set_voltag(ch, elem, 856 csv.csv_flags & CSV_AVOLTAG, 857 csv.csv_flags & CSV_CLEARTAG, 858 csv.csv_voltag); 859 up(&ch->lock); 860 return retval; 861 } 862 863 default: 864 return scsi_ioctl(ch->device, cmd, (void*)arg); 865 866 } 867 } 868 869 #ifdef CONFIG_COMPAT 870 871 struct changer_element_status32 { 872 int ces_type; 873 compat_uptr_t ces_data; 874 }; 875 #define CHIOGSTATUS32 _IOW('c', 8,struct changer_element_status32) 876 877 static long ch_ioctl_compat(struct file * file, 878 unsigned int cmd, unsigned long arg) 879 { 880 scsi_changer *ch = file->private_data; 881 882 switch (cmd) { 883 case CHIOGPARAMS: 884 case CHIOGVPARAMS: 885 case CHIOPOSITION: 886 case CHIOMOVE: 887 case CHIOEXCHANGE: 888 case CHIOGELEM: 889 case CHIOINITELEM: 890 case CHIOSVOLTAG: 891 /* compatible */ 892 return ch_ioctl(NULL /* inode, unused */, 893 file, cmd, arg); 894 case CHIOGSTATUS32: 895 { 896 struct changer_element_status32 ces32; 897 unsigned char *data; 898 899 if (copy_from_user(&ces32, (void*)arg, sizeof (ces32))) 900 return -EFAULT; 901 if (ces32.ces_type < 0 || ces32.ces_type >= CH_TYPES) 902 return -EINVAL; 903 904 data = compat_ptr(ces32.ces_data); 905 return ch_gstatus(ch, ces32.ces_type, data); 906 } 907 default: 908 // return scsi_ioctl_compat(ch->device, cmd, (void*)arg); 909 return -ENOIOCTLCMD; 910 911 } 912 } 913 #endif 914 915 /* ------------------------------------------------------------------------ */ 916 917 static int ch_probe(struct device *dev) 918 { 919 struct scsi_device *sd = to_scsi_device(dev); 920 scsi_changer *ch; 921 922 if (sd->type != TYPE_MEDIUM_CHANGER) 923 return -ENODEV; 924 925 ch = kmalloc(sizeof(*ch), GFP_KERNEL); 926 if (NULL == ch) 927 return -ENOMEM; 928 929 memset(ch,0,sizeof(*ch)); 930 ch->minor = ch_devcount; 931 sprintf(ch->name,"ch%d",ch->minor); 932 init_MUTEX(&ch->lock); 933 ch->device = sd; 934 ch_readconfig(ch); 935 if (init) 936 ch_init_elem(ch); 937 938 class_device_create(ch_sysfs_class, 939 MKDEV(SCSI_CHANGER_MAJOR,ch->minor), 940 dev, "s%s", ch->name); 941 942 printk(KERN_INFO "Attached scsi changer %s " 943 "at scsi%d, channel %d, id %d, lun %d\n", 944 ch->name, sd->host->host_no, sd->channel, sd->id, sd->lun); 945 946 spin_lock(&ch_devlist_lock); 947 list_add_tail(&ch->list,&ch_devlist); 948 ch_devcount++; 949 spin_unlock(&ch_devlist_lock); 950 return 0; 951 } 952 953 static int ch_remove(struct device *dev) 954 { 955 struct scsi_device *sd = to_scsi_device(dev); 956 scsi_changer *tmp, *ch; 957 958 spin_lock(&ch_devlist_lock); 959 ch = NULL; 960 list_for_each_entry(tmp,&ch_devlist,list) { 961 if (tmp->device == sd) 962 ch = tmp; 963 } 964 BUG_ON(NULL == ch); 965 list_del(&ch->list); 966 spin_unlock(&ch_devlist_lock); 967 968 class_device_destroy(ch_sysfs_class, 969 MKDEV(SCSI_CHANGER_MAJOR,ch->minor)); 970 kfree(ch->dt); 971 kfree(ch); 972 ch_devcount--; 973 return 0; 974 } 975 976 static int __init init_ch_module(void) 977 { 978 int rc; 979 980 printk(KERN_INFO "SCSI Media Changer driver v" VERSION " \n"); 981 ch_sysfs_class = class_create(THIS_MODULE, "scsi_changer"); 982 if (IS_ERR(ch_sysfs_class)) { 983 rc = PTR_ERR(ch_sysfs_class); 984 return rc; 985 } 986 rc = register_chrdev(SCSI_CHANGER_MAJOR,"ch",&changer_fops); 987 if (rc < 0) { 988 printk("Unable to get major %d for SCSI-Changer\n", 989 SCSI_CHANGER_MAJOR); 990 goto fail1; 991 } 992 rc = scsi_register_driver(&ch_template.gendrv); 993 if (rc < 0) 994 goto fail2; 995 return 0; 996 997 fail2: 998 unregister_chrdev(SCSI_CHANGER_MAJOR, "ch"); 999 fail1: 1000 class_destroy(ch_sysfs_class); 1001 return rc; 1002 } 1003 1004 static void __exit exit_ch_module(void) 1005 { 1006 scsi_unregister_driver(&ch_template.gendrv); 1007 unregister_chrdev(SCSI_CHANGER_MAJOR, "ch"); 1008 class_destroy(ch_sysfs_class); 1009 } 1010 1011 module_init(init_ch_module); 1012 module_exit(exit_ch_module); 1013 1014 /* 1015 * Local variables: 1016 * c-basic-offset: 8 1017 * End: 1018 */ 1019