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/devfs_fs_kernel.h> 24 #include <linux/ioctl32.h> 25 #include <linux/compat.h> 26 #include <linux/chio.h> /* here are all the ioctls */ 27 28 #include <scsi/scsi.h> 29 #include <scsi/scsi_cmnd.h> 30 #include <scsi/scsi_driver.h> 31 #include <scsi/scsi_ioctl.h> 32 #include <scsi/scsi_host.h> 33 #include <scsi/scsi_device.h> 34 #include <scsi/scsi_request.h> 35 #include <scsi/scsi_dbg.h> 36 37 #define CH_DT_MAX 16 38 #define CH_TYPES 8 39 40 MODULE_DESCRIPTION("device driver for scsi media changer devices"); 41 MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org>"); 42 MODULE_LICENSE("GPL"); 43 44 static int init = 1; 45 module_param(init, int, 0444); 46 MODULE_PARM_DESC(init, \ 47 "initialize element status on driver load (default: on)"); 48 49 static int timeout_move = 300; 50 module_param(timeout_move, int, 0644); 51 MODULE_PARM_DESC(timeout_move,"timeout for move commands " 52 "(default: 300 seconds)"); 53 54 static int timeout_init = 3600; 55 module_param(timeout_init, int, 0644); 56 MODULE_PARM_DESC(timeout_init,"timeout for INITIALIZE ELEMENT STATUS " 57 "(default: 3600 seconds)"); 58 59 static int verbose = 1; 60 module_param(verbose, int, 0644); 61 MODULE_PARM_DESC(verbose,"be verbose (default: on)"); 62 63 static int debug = 0; 64 module_param(debug, int, 0644); 65 MODULE_PARM_DESC(debug,"enable/disable debug messages, also prints more " 66 "detailed sense codes on scsi errors (default: off)"); 67 68 static int dt_id[CH_DT_MAX] = { [ 0 ... (CH_DT_MAX-1) ] = -1 }; 69 static int dt_lun[CH_DT_MAX]; 70 module_param_array(dt_id, int, NULL, 0444); 71 module_param_array(dt_lun, int, NULL, 0444); 72 73 /* tell the driver about vendor-specific slots */ 74 static int vendor_firsts[CH_TYPES-4]; 75 static int vendor_counts[CH_TYPES-4]; 76 module_param_array(vendor_firsts, int, NULL, 0444); 77 module_param_array(vendor_counts, int, NULL, 0444); 78 79 static char *vendor_labels[CH_TYPES-4] = { 80 "v0", "v1", "v2", "v3" 81 }; 82 // module_param_string_array(vendor_labels, NULL, 0444); 83 84 #define dprintk(fmt, arg...) if (debug) \ 85 printk(KERN_DEBUG "%s: " fmt, ch->name , ## arg) 86 #define vprintk(fmt, arg...) if (verbose) \ 87 printk(KERN_INFO "%s: " fmt, ch->name , ## arg) 88 89 /* ------------------------------------------------------------------- */ 90 91 #define MAX_RETRIES 1 92 93 static int ch_probe(struct device *); 94 static int ch_remove(struct device *); 95 static int ch_open(struct inode * inode, struct file * filp); 96 static int ch_release(struct inode * inode, struct file * filp); 97 static int ch_ioctl(struct inode * inode, struct file * filp, 98 unsigned int cmd, unsigned long arg); 99 #ifdef CONFIG_COMPAT 100 static long ch_ioctl_compat(struct file * filp, 101 unsigned int cmd, unsigned long arg); 102 #endif 103 104 static struct class * ch_sysfs_class; 105 106 typedef struct { 107 struct list_head list; 108 int minor; 109 char name[8]; 110 struct scsi_device *device; 111 struct scsi_device **dt; /* ptrs to data transfer elements */ 112 u_int firsts[CH_TYPES]; 113 u_int counts[CH_TYPES]; 114 u_int unit_attention; 115 u_int voltags; 116 struct semaphore lock; 117 } scsi_changer; 118 119 static LIST_HEAD(ch_devlist); 120 static spinlock_t ch_devlist_lock = SPIN_LOCK_UNLOCKED; 121 static int ch_devcount; 122 123 static struct scsi_driver ch_template = 124 { 125 .owner = THIS_MODULE, 126 .gendrv = { 127 .name = "ch", 128 .probe = ch_probe, 129 .remove = ch_remove, 130 }, 131 }; 132 133 static struct file_operations changer_fops = 134 { 135 .owner = THIS_MODULE, 136 .open = ch_open, 137 .release = ch_release, 138 .ioctl = ch_ioctl, 139 #ifdef CONFIG_COMPAT 140 .compat_ioctl = ch_ioctl_compat, 141 #endif 142 }; 143 144 static struct { 145 unsigned char sense; 146 unsigned char asc; 147 unsigned char ascq; 148 int errno; 149 } err[] = { 150 /* Just filled in what looks right. Hav'nt checked any standard paper for 151 these errno assignments, so they may be wrong... */ 152 { 153 .sense = ILLEGAL_REQUEST, 154 .asc = 0x21, 155 .ascq = 0x01, 156 .errno = EBADSLT, /* Invalid element address */ 157 },{ 158 .sense = ILLEGAL_REQUEST, 159 .asc = 0x28, 160 .ascq = 0x01, 161 .errno = EBADE, /* Import or export element accessed */ 162 },{ 163 .sense = ILLEGAL_REQUEST, 164 .asc = 0x3B, 165 .ascq = 0x0D, 166 .errno = EXFULL, /* Medium destination element full */ 167 },{ 168 .sense = ILLEGAL_REQUEST, 169 .asc = 0x3B, 170 .ascq = 0x0E, 171 .errno = EBADE, /* Medium source element empty */ 172 },{ 173 .sense = ILLEGAL_REQUEST, 174 .asc = 0x20, 175 .ascq = 0x00, 176 .errno = EBADRQC, /* Invalid command operation code */ 177 },{ 178 /* end of list */ 179 } 180 }; 181 182 /* ------------------------------------------------------------------- */ 183 184 static int ch_find_errno(unsigned char *sense_buffer) 185 { 186 int i,errno = 0; 187 188 /* Check to see if additional sense information is available */ 189 if (sense_buffer[7] > 5 && 190 sense_buffer[12] != 0) { 191 for (i = 0; err[i].errno != 0; i++) { 192 if (err[i].sense == sense_buffer[ 2] && 193 err[i].asc == sense_buffer[12] && 194 err[i].ascq == sense_buffer[13]) { 195 errno = -err[i].errno; 196 break; 197 } 198 } 199 } 200 if (errno == 0) 201 errno = -EIO; 202 return errno; 203 } 204 205 static int 206 ch_do_scsi(scsi_changer *ch, unsigned char *cmd, 207 void *buffer, unsigned buflength, 208 enum dma_data_direction direction) 209 { 210 int errno, retries = 0, timeout; 211 struct scsi_request *sr; 212 213 sr = scsi_allocate_request(ch->device, GFP_KERNEL); 214 if (NULL == sr) 215 return -ENOMEM; 216 217 timeout = (cmd[0] == INITIALIZE_ELEMENT_STATUS) 218 ? timeout_init : timeout_move; 219 220 retry: 221 errno = 0; 222 if (debug) { 223 dprintk("command: "); 224 __scsi_print_command(cmd); 225 } 226 227 scsi_wait_req(sr, cmd, buffer, buflength, 228 timeout * HZ, MAX_RETRIES); 229 230 dprintk("result: 0x%x\n",sr->sr_result); 231 if (driver_byte(sr->sr_result) & DRIVER_SENSE) { 232 if (debug) 233 scsi_print_req_sense(ch->name, sr); 234 errno = ch_find_errno(sr->sr_sense_buffer); 235 236 switch(sr->sr_sense_buffer[2] & 0xf) { 237 case UNIT_ATTENTION: 238 ch->unit_attention = 1; 239 if (retries++ < 3) 240 goto retry; 241 break; 242 } 243 } 244 scsi_release_request(sr); 245 return errno; 246 } 247 248 /* ------------------------------------------------------------------------ */ 249 250 static int 251 ch_elem_to_typecode(scsi_changer *ch, u_int elem) 252 { 253 int i; 254 255 for (i = 0; i < CH_TYPES; i++) { 256 if (elem >= ch->firsts[i] && 257 elem < ch->firsts[i] + 258 ch->counts[i]) 259 return i+1; 260 } 261 return 0; 262 } 263 264 static int 265 ch_read_element_status(scsi_changer *ch, u_int elem, char *data) 266 { 267 u_char cmd[12]; 268 u_char *buffer; 269 int result; 270 271 buffer = kmalloc(512, GFP_KERNEL | GFP_DMA); 272 if(!buffer) 273 return -ENOMEM; 274 275 retry: 276 memset(cmd,0,sizeof(cmd)); 277 cmd[0] = READ_ELEMENT_STATUS; 278 cmd[1] = (ch->device->lun << 5) | 279 (ch->voltags ? 0x10 : 0) | 280 ch_elem_to_typecode(ch,elem); 281 cmd[2] = (elem >> 8) & 0xff; 282 cmd[3] = elem & 0xff; 283 cmd[5] = 1; 284 cmd[9] = 255; 285 if (0 == (result = ch_do_scsi(ch, cmd, buffer, 256, DMA_FROM_DEVICE))) { 286 if (((buffer[16] << 8) | buffer[17]) != elem) { 287 dprintk("asked for element 0x%02x, got 0x%02x\n", 288 elem,(buffer[16] << 8) | buffer[17]); 289 kfree(buffer); 290 return -EIO; 291 } 292 memcpy(data,buffer+16,16); 293 } else { 294 if (ch->voltags) { 295 ch->voltags = 0; 296 vprintk("device has no volume tag support\n"); 297 goto retry; 298 } 299 dprintk("READ ELEMENT STATUS for element 0x%x failed\n",elem); 300 } 301 kfree(buffer); 302 return result; 303 } 304 305 static int 306 ch_init_elem(scsi_changer *ch) 307 { 308 int err; 309 u_char cmd[6]; 310 311 vprintk("INITIALIZE ELEMENT STATUS, may take some time ...\n"); 312 memset(cmd,0,sizeof(cmd)); 313 cmd[0] = INITIALIZE_ELEMENT_STATUS; 314 cmd[1] = ch->device->lun << 5; 315 err = ch_do_scsi(ch, cmd, NULL, 0, DMA_NONE); 316 vprintk("... finished\n"); 317 return err; 318 } 319 320 static int 321 ch_readconfig(scsi_changer *ch) 322 { 323 u_char cmd[10], data[16]; 324 u_char *buffer; 325 int result,id,lun,i; 326 u_int elem; 327 328 buffer = kmalloc(512, GFP_KERNEL | GFP_DMA); 329 if (!buffer) 330 return -ENOMEM; 331 memset(buffer,0,512); 332 333 memset(cmd,0,sizeof(cmd)); 334 cmd[0] = MODE_SENSE; 335 cmd[1] = ch->device->lun << 5; 336 cmd[2] = 0x1d; 337 cmd[4] = 255; 338 result = ch_do_scsi(ch, cmd, buffer, 255, DMA_FROM_DEVICE); 339 if (0 != result) { 340 cmd[1] |= (1<<3); 341 result = ch_do_scsi(ch, cmd, buffer, 255, DMA_FROM_DEVICE); 342 } 343 if (0 == result) { 344 ch->firsts[CHET_MT] = 345 (buffer[buffer[3]+ 6] << 8) | buffer[buffer[3]+ 7]; 346 ch->counts[CHET_MT] = 347 (buffer[buffer[3]+ 8] << 8) | buffer[buffer[3]+ 9]; 348 ch->firsts[CHET_ST] = 349 (buffer[buffer[3]+10] << 8) | buffer[buffer[3]+11]; 350 ch->counts[CHET_ST] = 351 (buffer[buffer[3]+12] << 8) | buffer[buffer[3]+13]; 352 ch->firsts[CHET_IE] = 353 (buffer[buffer[3]+14] << 8) | buffer[buffer[3]+15]; 354 ch->counts[CHET_IE] = 355 (buffer[buffer[3]+16] << 8) | buffer[buffer[3]+17]; 356 ch->firsts[CHET_DT] = 357 (buffer[buffer[3]+18] << 8) | buffer[buffer[3]+19]; 358 ch->counts[CHET_DT] = 359 (buffer[buffer[3]+20] << 8) | buffer[buffer[3]+21]; 360 vprintk("type #1 (mt): 0x%x+%d [medium transport]\n", 361 ch->firsts[CHET_MT], 362 ch->counts[CHET_MT]); 363 vprintk("type #2 (st): 0x%x+%d [storage]\n", 364 ch->firsts[CHET_ST], 365 ch->counts[CHET_ST]); 366 vprintk("type #3 (ie): 0x%x+%d [import/export]\n", 367 ch->firsts[CHET_IE], 368 ch->counts[CHET_IE]); 369 vprintk("type #4 (dt): 0x%x+%d [data transfer]\n", 370 ch->firsts[CHET_DT], 371 ch->counts[CHET_DT]); 372 } else { 373 vprintk("reading element address assigment page failed!\n"); 374 } 375 376 /* vendor specific element types */ 377 for (i = 0; i < 4; i++) { 378 if (0 == vendor_counts[i]) 379 continue; 380 if (NULL == vendor_labels[i]) 381 continue; 382 ch->firsts[CHET_V1+i] = vendor_firsts[i]; 383 ch->counts[CHET_V1+i] = vendor_counts[i]; 384 vprintk("type #%d (v%d): 0x%x+%d [%s, vendor specific]\n", 385 i+5,i+1,vendor_firsts[i],vendor_counts[i], 386 vendor_labels[i]); 387 } 388 389 /* look up the devices of the data transfer elements */ 390 ch->dt = kmalloc(ch->counts[CHET_DT]*sizeof(struct scsi_device), 391 GFP_KERNEL); 392 for (elem = 0; elem < ch->counts[CHET_DT]; elem++) { 393 id = -1; 394 lun = 0; 395 if (elem < CH_DT_MAX && -1 != dt_id[elem]) { 396 id = dt_id[elem]; 397 lun = dt_lun[elem]; 398 vprintk("dt 0x%x: [insmod option] ", 399 elem+ch->firsts[CHET_DT]); 400 } else if (0 != ch_read_element_status 401 (ch,elem+ch->firsts[CHET_DT],data)) { 402 vprintk("dt 0x%x: READ ELEMENT STATUS failed\n", 403 elem+ch->firsts[CHET_DT]); 404 } else { 405 vprintk("dt 0x%x: ",elem+ch->firsts[CHET_DT]); 406 if (data[6] & 0x80) { 407 if (verbose) 408 printk("not this SCSI bus\n"); 409 ch->dt[elem] = NULL; 410 } else if (0 == (data[6] & 0x30)) { 411 if (verbose) 412 printk("ID/LUN unknown\n"); 413 ch->dt[elem] = NULL; 414 } else { 415 id = ch->device->id; 416 lun = 0; 417 if (data[6] & 0x20) id = data[7]; 418 if (data[6] & 0x10) lun = data[6] & 7; 419 } 420 } 421 if (-1 != id) { 422 if (verbose) 423 printk("ID %i, LUN %i, ",id,lun); 424 ch->dt[elem] = 425 scsi_device_lookup(ch->device->host, 426 ch->device->channel, 427 id,lun); 428 if (!ch->dt[elem]) { 429 /* should not happen */ 430 if (verbose) 431 printk("Huh? device not found!\n"); 432 } else { 433 if (verbose) 434 printk("name: %8.8s %16.16s %4.4s\n", 435 ch->dt[elem]->vendor, 436 ch->dt[elem]->model, 437 ch->dt[elem]->rev); 438 } 439 } 440 } 441 ch->voltags = 1; 442 kfree(buffer); 443 444 return 0; 445 } 446 447 /* ------------------------------------------------------------------------ */ 448 449 static int 450 ch_position(scsi_changer *ch, u_int trans, u_int elem, int rotate) 451 { 452 u_char cmd[10]; 453 454 dprintk("position: 0x%x\n",elem); 455 if (0 == trans) 456 trans = ch->firsts[CHET_MT]; 457 memset(cmd,0,sizeof(cmd)); 458 cmd[0] = POSITION_TO_ELEMENT; 459 cmd[1] = ch->device->lun << 5; 460 cmd[2] = (trans >> 8) & 0xff; 461 cmd[3] = trans & 0xff; 462 cmd[4] = (elem >> 8) & 0xff; 463 cmd[5] = elem & 0xff; 464 cmd[8] = rotate ? 1 : 0; 465 return ch_do_scsi(ch, cmd, NULL, 0, DMA_NONE); 466 } 467 468 static int 469 ch_move(scsi_changer *ch, u_int trans, u_int src, u_int dest, int rotate) 470 { 471 u_char cmd[12]; 472 473 dprintk("move: 0x%x => 0x%x\n",src,dest); 474 if (0 == trans) 475 trans = ch->firsts[CHET_MT]; 476 memset(cmd,0,sizeof(cmd)); 477 cmd[0] = MOVE_MEDIUM; 478 cmd[1] = ch->device->lun << 5; 479 cmd[2] = (trans >> 8) & 0xff; 480 cmd[3] = trans & 0xff; 481 cmd[4] = (src >> 8) & 0xff; 482 cmd[5] = src & 0xff; 483 cmd[6] = (dest >> 8) & 0xff; 484 cmd[7] = dest & 0xff; 485 cmd[10] = rotate ? 1 : 0; 486 return ch_do_scsi(ch, cmd, NULL,0, DMA_NONE); 487 } 488 489 static int 490 ch_exchange(scsi_changer *ch, u_int trans, u_int src, 491 u_int dest1, u_int dest2, int rotate1, int rotate2) 492 { 493 u_char cmd[12]; 494 495 dprintk("exchange: 0x%x => 0x%x => 0x%x\n", 496 src,dest1,dest2); 497 if (0 == trans) 498 trans = ch->firsts[CHET_MT]; 499 memset(cmd,0,sizeof(cmd)); 500 cmd[0] = EXCHANGE_MEDIUM; 501 cmd[1] = ch->device->lun << 5; 502 cmd[2] = (trans >> 8) & 0xff; 503 cmd[3] = trans & 0xff; 504 cmd[4] = (src >> 8) & 0xff; 505 cmd[5] = src & 0xff; 506 cmd[6] = (dest1 >> 8) & 0xff; 507 cmd[7] = dest1 & 0xff; 508 cmd[8] = (dest2 >> 8) & 0xff; 509 cmd[9] = dest2 & 0xff; 510 cmd[10] = (rotate1 ? 1 : 0) | (rotate2 ? 2 : 0); 511 512 return ch_do_scsi(ch, cmd, NULL,0, DMA_NONE); 513 } 514 515 static void 516 ch_check_voltag(char *tag) 517 { 518 int i; 519 520 for (i = 0; i < 32; i++) { 521 /* restrict to ascii */ 522 if (tag[i] >= 0x7f || tag[i] < 0x20) 523 tag[i] = ' '; 524 /* don't allow search wildcards */ 525 if (tag[i] == '?' || 526 tag[i] == '*') 527 tag[i] = ' '; 528 } 529 } 530 531 static int 532 ch_set_voltag(scsi_changer *ch, u_int elem, 533 int alternate, int clear, u_char *tag) 534 { 535 u_char cmd[12]; 536 u_char *buffer; 537 int result; 538 539 buffer = kmalloc(512, GFP_KERNEL); 540 if (!buffer) 541 return -ENOMEM; 542 memset(buffer,0,512); 543 544 dprintk("%s %s voltag: 0x%x => \"%s\"\n", 545 clear ? "clear" : "set", 546 alternate ? "alternate" : "primary", 547 elem, tag); 548 memset(cmd,0,sizeof(cmd)); 549 cmd[0] = SEND_VOLUME_TAG; 550 cmd[1] = (ch->device->lun << 5) | 551 ch_elem_to_typecode(ch,elem); 552 cmd[2] = (elem >> 8) & 0xff; 553 cmd[3] = elem & 0xff; 554 cmd[5] = clear 555 ? (alternate ? 0x0d : 0x0c) 556 : (alternate ? 0x0b : 0x0a); 557 558 cmd[9] = 255; 559 560 memcpy(buffer,tag,32); 561 ch_check_voltag(buffer); 562 563 result = ch_do_scsi(ch, cmd, buffer, 256, DMA_TO_DEVICE); 564 kfree(buffer); 565 return result; 566 } 567 568 static int ch_gstatus(scsi_changer *ch, int type, unsigned char *dest) 569 { 570 int retval = 0; 571 u_char data[16]; 572 unsigned int i; 573 574 down(&ch->lock); 575 for (i = 0; i < ch->counts[type]; i++) { 576 if (0 != ch_read_element_status 577 (ch, ch->firsts[type]+i,data)) { 578 retval = -EIO; 579 break; 580 } 581 put_user(data[2], dest+i); 582 if (data[2] & CESTATUS_EXCEPT) 583 vprintk("element 0x%x: asc=0x%x, ascq=0x%x\n", 584 ch->firsts[type]+i, 585 (int)data[4],(int)data[5]); 586 retval = ch_read_element_status 587 (ch, ch->firsts[type]+i,data); 588 if (0 != retval) 589 break; 590 } 591 up(&ch->lock); 592 return retval; 593 } 594 595 /* ------------------------------------------------------------------------ */ 596 597 static int 598 ch_release(struct inode *inode, struct file *file) 599 { 600 scsi_changer *ch = file->private_data; 601 602 scsi_device_put(ch->device); 603 file->private_data = NULL; 604 return 0; 605 } 606 607 static int 608 ch_open(struct inode *inode, struct file *file) 609 { 610 scsi_changer *tmp, *ch; 611 int minor = iminor(inode); 612 613 spin_lock(&ch_devlist_lock); 614 ch = NULL; 615 list_for_each_entry(tmp,&ch_devlist,list) { 616 if (tmp->minor == minor) 617 ch = tmp; 618 } 619 if (NULL == ch || scsi_device_get(ch->device)) { 620 spin_unlock(&ch_devlist_lock); 621 return -ENXIO; 622 } 623 spin_unlock(&ch_devlist_lock); 624 625 file->private_data = ch; 626 return 0; 627 } 628 629 static int 630 ch_checkrange(scsi_changer *ch, unsigned int type, unsigned int unit) 631 { 632 if (type >= CH_TYPES || unit >= ch->counts[type]) 633 return -1; 634 return 0; 635 } 636 637 static int ch_ioctl(struct inode * inode, struct file * file, 638 unsigned int cmd, unsigned long arg) 639 { 640 scsi_changer *ch = file->private_data; 641 int retval; 642 643 switch (cmd) { 644 case CHIOGPARAMS: 645 { 646 struct changer_params params; 647 648 params.cp_curpicker = 0; 649 params.cp_npickers = ch->counts[CHET_MT]; 650 params.cp_nslots = ch->counts[CHET_ST]; 651 params.cp_nportals = ch->counts[CHET_IE]; 652 params.cp_ndrives = ch->counts[CHET_DT]; 653 654 if (copy_to_user((void *) arg, ¶ms, sizeof(params))) 655 return -EFAULT; 656 return 0; 657 } 658 case CHIOGVPARAMS: 659 { 660 struct changer_vendor_params vparams; 661 662 memset(&vparams,0,sizeof(vparams)); 663 if (ch->counts[CHET_V1]) { 664 vparams.cvp_n1 = ch->counts[CHET_V1]; 665 strncpy(vparams.cvp_label1,vendor_labels[0],16); 666 } 667 if (ch->counts[CHET_V2]) { 668 vparams.cvp_n2 = ch->counts[CHET_V2]; 669 strncpy(vparams.cvp_label2,vendor_labels[1],16); 670 } 671 if (ch->counts[CHET_V3]) { 672 vparams.cvp_n3 = ch->counts[CHET_V3]; 673 strncpy(vparams.cvp_label3,vendor_labels[2],16); 674 } 675 if (ch->counts[CHET_V4]) { 676 vparams.cvp_n4 = ch->counts[CHET_V4]; 677 strncpy(vparams.cvp_label4,vendor_labels[3],16); 678 } 679 if (copy_to_user((void *) arg, &vparams, sizeof(vparams))) 680 return -EFAULT; 681 return 0; 682 } 683 684 case CHIOPOSITION: 685 { 686 struct changer_position pos; 687 688 if (copy_from_user(&pos, (void*)arg, sizeof (pos))) 689 return -EFAULT; 690 691 if (0 != ch_checkrange(ch, pos.cp_type, pos.cp_unit)) { 692 dprintk("CHIOPOSITION: invalid parameter\n"); 693 return -EBADSLT; 694 } 695 down(&ch->lock); 696 retval = ch_position(ch,0, 697 ch->firsts[pos.cp_type] + pos.cp_unit, 698 pos.cp_flags & CP_INVERT); 699 up(&ch->lock); 700 return retval; 701 } 702 703 case CHIOMOVE: 704 { 705 struct changer_move mv; 706 707 if (copy_from_user(&mv, (void*)arg, sizeof (mv))) 708 return -EFAULT; 709 710 if (0 != ch_checkrange(ch, mv.cm_fromtype, mv.cm_fromunit) || 711 0 != ch_checkrange(ch, mv.cm_totype, mv.cm_tounit )) { 712 dprintk("CHIOMOVE: invalid parameter\n"); 713 return -EBADSLT; 714 } 715 716 down(&ch->lock); 717 retval = ch_move(ch,0, 718 ch->firsts[mv.cm_fromtype] + mv.cm_fromunit, 719 ch->firsts[mv.cm_totype] + mv.cm_tounit, 720 mv.cm_flags & CM_INVERT); 721 up(&ch->lock); 722 return retval; 723 } 724 725 case CHIOEXCHANGE: 726 { 727 struct changer_exchange mv; 728 729 if (copy_from_user(&mv, (void*)arg, sizeof (mv))) 730 return -EFAULT; 731 732 if (0 != ch_checkrange(ch, mv.ce_srctype, mv.ce_srcunit ) || 733 0 != ch_checkrange(ch, mv.ce_fdsttype, mv.ce_fdstunit) || 734 0 != ch_checkrange(ch, mv.ce_sdsttype, mv.ce_sdstunit)) { 735 dprintk("CHIOEXCHANGE: invalid parameter\n"); 736 return -EBADSLT; 737 } 738 739 down(&ch->lock); 740 retval = ch_exchange 741 (ch,0, 742 ch->firsts[mv.ce_srctype] + mv.ce_srcunit, 743 ch->firsts[mv.ce_fdsttype] + mv.ce_fdstunit, 744 ch->firsts[mv.ce_sdsttype] + mv.ce_sdstunit, 745 mv.ce_flags & CE_INVERT1, mv.ce_flags & CE_INVERT2); 746 up(&ch->lock); 747 return retval; 748 } 749 750 case CHIOGSTATUS: 751 { 752 struct changer_element_status ces; 753 754 if (copy_from_user(&ces, (void*)arg, sizeof (ces))) 755 return -EFAULT; 756 if (ces.ces_type < 0 || ces.ces_type >= CH_TYPES) 757 return -EINVAL; 758 759 return ch_gstatus(ch, ces.ces_type, ces.ces_data); 760 } 761 762 case CHIOGELEM: 763 { 764 struct changer_get_element cge; 765 u_char cmd[12]; 766 u_char *buffer; 767 unsigned int elem; 768 int result,i; 769 770 if (copy_from_user(&cge, (void*)arg, sizeof (cge))) 771 return -EFAULT; 772 773 if (0 != ch_checkrange(ch, cge.cge_type, cge.cge_unit)) 774 return -EINVAL; 775 elem = ch->firsts[cge.cge_type] + cge.cge_unit; 776 777 buffer = kmalloc(512, GFP_KERNEL | GFP_DMA); 778 if (!buffer) 779 return -ENOMEM; 780 down(&ch->lock); 781 782 voltag_retry: 783 memset(cmd,0,sizeof(cmd)); 784 cmd[0] = READ_ELEMENT_STATUS; 785 cmd[1] = (ch->device->lun << 5) | 786 (ch->voltags ? 0x10 : 0) | 787 ch_elem_to_typecode(ch,elem); 788 cmd[2] = (elem >> 8) & 0xff; 789 cmd[3] = elem & 0xff; 790 cmd[5] = 1; 791 cmd[9] = 255; 792 793 if (0 == (result = ch_do_scsi(ch, cmd, buffer, 256, DMA_FROM_DEVICE))) { 794 cge.cge_status = buffer[18]; 795 cge.cge_flags = 0; 796 if (buffer[18] & CESTATUS_EXCEPT) { 797 cge.cge_errno = EIO; 798 } 799 if (buffer[25] & 0x80) { 800 cge.cge_flags |= CGE_SRC; 801 if (buffer[25] & 0x40) 802 cge.cge_flags |= CGE_INVERT; 803 elem = (buffer[26]<<8) | buffer[27]; 804 for (i = 0; i < 4; i++) { 805 if (elem >= ch->firsts[i] && 806 elem < ch->firsts[i] + ch->counts[i]) { 807 cge.cge_srctype = i; 808 cge.cge_srcunit = elem-ch->firsts[i]; 809 } 810 } 811 } 812 if ((buffer[22] & 0x30) == 0x30) { 813 cge.cge_flags |= CGE_IDLUN; 814 cge.cge_id = buffer[23]; 815 cge.cge_lun = buffer[22] & 7; 816 } 817 if (buffer[9] & 0x80) { 818 cge.cge_flags |= CGE_PVOLTAG; 819 memcpy(cge.cge_pvoltag,buffer+28,36); 820 } 821 if (buffer[9] & 0x40) { 822 cge.cge_flags |= CGE_AVOLTAG; 823 memcpy(cge.cge_avoltag,buffer+64,36); 824 } 825 } else if (ch->voltags) { 826 ch->voltags = 0; 827 vprintk("device has no volume tag support\n"); 828 goto voltag_retry; 829 } 830 kfree(buffer); 831 up(&ch->lock); 832 833 if (copy_to_user((void*)arg, &cge, sizeof (cge))) 834 return -EFAULT; 835 return result; 836 } 837 838 case CHIOINITELEM: 839 { 840 down(&ch->lock); 841 retval = ch_init_elem(ch); 842 up(&ch->lock); 843 return retval; 844 } 845 846 case CHIOSVOLTAG: 847 { 848 struct changer_set_voltag csv; 849 int elem; 850 851 if (copy_from_user(&csv, (void*)arg, sizeof(csv))) 852 return -EFAULT; 853 854 if (0 != ch_checkrange(ch, csv.csv_type, csv.csv_unit)) { 855 dprintk("CHIOSVOLTAG: invalid parameter\n"); 856 return -EBADSLT; 857 } 858 elem = ch->firsts[csv.csv_type] + csv.csv_unit; 859 down(&ch->lock); 860 retval = ch_set_voltag(ch, elem, 861 csv.csv_flags & CSV_AVOLTAG, 862 csv.csv_flags & CSV_CLEARTAG, 863 csv.csv_voltag); 864 up(&ch->lock); 865 return retval; 866 } 867 868 default: 869 return scsi_ioctl(ch->device, cmd, (void*)arg); 870 871 } 872 } 873 874 #ifdef CONFIG_COMPAT 875 876 struct changer_element_status32 { 877 int ces_type; 878 compat_uptr_t ces_data; 879 }; 880 #define CHIOGSTATUS32 _IOW('c', 8,struct changer_element_status32) 881 882 static long ch_ioctl_compat(struct file * file, 883 unsigned int cmd, unsigned long arg) 884 { 885 scsi_changer *ch = file->private_data; 886 887 switch (cmd) { 888 case CHIOGPARAMS: 889 case CHIOGVPARAMS: 890 case CHIOPOSITION: 891 case CHIOMOVE: 892 case CHIOEXCHANGE: 893 case CHIOGELEM: 894 case CHIOINITELEM: 895 case CHIOSVOLTAG: 896 /* compatible */ 897 return ch_ioctl(NULL /* inode, unused */, 898 file, cmd, arg); 899 case CHIOGSTATUS32: 900 { 901 struct changer_element_status32 ces32; 902 unsigned char *data; 903 904 if (copy_from_user(&ces32, (void*)arg, sizeof (ces32))) 905 return -EFAULT; 906 if (ces32.ces_type < 0 || ces32.ces_type >= CH_TYPES) 907 return -EINVAL; 908 909 data = compat_ptr(ces32.ces_data); 910 return ch_gstatus(ch, ces32.ces_type, data); 911 } 912 default: 913 // return scsi_ioctl_compat(ch->device, cmd, (void*)arg); 914 return -ENOIOCTLCMD; 915 916 } 917 } 918 #endif 919 920 /* ------------------------------------------------------------------------ */ 921 922 static int ch_probe(struct device *dev) 923 { 924 struct scsi_device *sd = to_scsi_device(dev); 925 scsi_changer *ch; 926 927 if (sd->type != TYPE_MEDIUM_CHANGER) 928 return -ENODEV; 929 930 ch = kmalloc(sizeof(*ch), GFP_KERNEL); 931 if (NULL == ch) 932 return -ENOMEM; 933 934 memset(ch,0,sizeof(*ch)); 935 ch->minor = ch_devcount; 936 sprintf(ch->name,"ch%d",ch->minor); 937 init_MUTEX(&ch->lock); 938 ch->device = sd; 939 ch_readconfig(ch); 940 if (init) 941 ch_init_elem(ch); 942 943 devfs_mk_cdev(MKDEV(SCSI_CHANGER_MAJOR,ch->minor), 944 S_IFCHR | S_IRUGO | S_IWUGO, ch->name); 945 class_device_create(ch_sysfs_class, 946 MKDEV(SCSI_CHANGER_MAJOR,ch->minor), 947 dev, "s%s", ch->name); 948 949 printk(KERN_INFO "Attached scsi changer %s " 950 "at scsi%d, channel %d, id %d, lun %d\n", 951 ch->name, sd->host->host_no, sd->channel, sd->id, sd->lun); 952 953 spin_lock(&ch_devlist_lock); 954 list_add_tail(&ch->list,&ch_devlist); 955 ch_devcount++; 956 spin_unlock(&ch_devlist_lock); 957 return 0; 958 } 959 960 static int ch_remove(struct device *dev) 961 { 962 struct scsi_device *sd = to_scsi_device(dev); 963 scsi_changer *tmp, *ch; 964 965 spin_lock(&ch_devlist_lock); 966 ch = NULL; 967 list_for_each_entry(tmp,&ch_devlist,list) { 968 if (tmp->device == sd) 969 ch = tmp; 970 } 971 BUG_ON(NULL == ch); 972 list_del(&ch->list); 973 spin_unlock(&ch_devlist_lock); 974 975 class_device_destroy(ch_sysfs_class, 976 MKDEV(SCSI_CHANGER_MAJOR,ch->minor)); 977 devfs_remove(ch->name); 978 kfree(ch->dt); 979 kfree(ch); 980 ch_devcount--; 981 return 0; 982 } 983 984 static int __init init_ch_module(void) 985 { 986 int rc; 987 988 printk(KERN_INFO "SCSI Media Changer driver v" VERSION " \n"); 989 ch_sysfs_class = class_create(THIS_MODULE, "scsi_changer"); 990 if (IS_ERR(ch_sysfs_class)) { 991 rc = PTR_ERR(ch_sysfs_class); 992 return rc; 993 } 994 rc = register_chrdev(SCSI_CHANGER_MAJOR,"ch",&changer_fops); 995 if (rc < 0) { 996 printk("Unable to get major %d for SCSI-Changer\n", 997 SCSI_CHANGER_MAJOR); 998 goto fail1; 999 } 1000 rc = scsi_register_driver(&ch_template.gendrv); 1001 if (rc < 0) 1002 goto fail2; 1003 return 0; 1004 1005 fail2: 1006 unregister_chrdev(SCSI_CHANGER_MAJOR, "ch"); 1007 fail1: 1008 class_destroy(ch_sysfs_class); 1009 return rc; 1010 } 1011 1012 static void __exit exit_ch_module(void) 1013 { 1014 scsi_unregister_driver(&ch_template.gendrv); 1015 unregister_chrdev(SCSI_CHANGER_MAJOR, "ch"); 1016 class_destroy(ch_sysfs_class); 1017 } 1018 1019 module_init(init_ch_module); 1020 module_exit(exit_ch_module); 1021 1022 /* 1023 * Local variables: 1024 * c-basic-offset: 8 1025 * End: 1026 */ 1027