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/compat.h> 24 #include <linux/chio.h> /* here are all the ioctls */ 25 26 #include <scsi/scsi.h> 27 #include <scsi/scsi_cmnd.h> 28 #include <scsi/scsi_driver.h> 29 #include <scsi/scsi_ioctl.h> 30 #include <scsi/scsi_host.h> 31 #include <scsi/scsi_device.h> 32 #include <scsi/scsi_eh.h> 33 #include <scsi/scsi_dbg.h> 34 35 #define CH_DT_MAX 16 36 #define CH_TYPES 8 37 38 MODULE_DESCRIPTION("device driver for scsi media changer devices"); 39 MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org>"); 40 MODULE_LICENSE("GPL"); 41 42 static int init = 1; 43 module_param(init, int, 0444); 44 MODULE_PARM_DESC(init, \ 45 "initialize element status on driver load (default: on)"); 46 47 static int timeout_move = 300; 48 module_param(timeout_move, int, 0644); 49 MODULE_PARM_DESC(timeout_move,"timeout for move commands " 50 "(default: 300 seconds)"); 51 52 static int timeout_init = 3600; 53 module_param(timeout_init, int, 0644); 54 MODULE_PARM_DESC(timeout_init,"timeout for INITIALIZE ELEMENT STATUS " 55 "(default: 3600 seconds)"); 56 57 static int verbose = 1; 58 module_param(verbose, int, 0644); 59 MODULE_PARM_DESC(verbose,"be verbose (default: on)"); 60 61 static int debug = 0; 62 module_param(debug, int, 0644); 63 MODULE_PARM_DESC(debug,"enable/disable debug messages, also prints more " 64 "detailed sense codes on scsi errors (default: off)"); 65 66 static int dt_id[CH_DT_MAX] = { [ 0 ... (CH_DT_MAX-1) ] = -1 }; 67 static int dt_lun[CH_DT_MAX]; 68 module_param_array(dt_id, int, NULL, 0444); 69 module_param_array(dt_lun, int, NULL, 0444); 70 71 /* tell the driver about vendor-specific slots */ 72 static int vendor_firsts[CH_TYPES-4]; 73 static int vendor_counts[CH_TYPES-4]; 74 module_param_array(vendor_firsts, int, NULL, 0444); 75 module_param_array(vendor_counts, int, NULL, 0444); 76 77 static const char * vendor_labels[CH_TYPES-4] = { 78 "v0", "v1", "v2", "v3" 79 }; 80 // module_param_string_array(vendor_labels, NULL, 0444); 81 82 #define dprintk(fmt, arg...) if (debug) \ 83 printk(KERN_DEBUG "%s: " fmt, ch->name , ## arg) 84 #define vprintk(fmt, arg...) if (verbose) \ 85 printk(KERN_INFO "%s: " fmt, ch->name , ## arg) 86 87 /* ------------------------------------------------------------------- */ 88 89 #define MAX_RETRIES 1 90 91 static int ch_probe(struct device *); 92 static int ch_remove(struct device *); 93 static int ch_open(struct inode * inode, struct file * filp); 94 static int ch_release(struct inode * inode, struct file * filp); 95 static int ch_ioctl(struct inode * inode, struct file * filp, 96 unsigned int cmd, unsigned long arg); 97 #ifdef CONFIG_COMPAT 98 static long ch_ioctl_compat(struct file * filp, 99 unsigned int cmd, unsigned long arg); 100 #endif 101 102 static struct class * ch_sysfs_class; 103 104 typedef struct { 105 struct list_head list; 106 int minor; 107 char name[8]; 108 struct scsi_device *device; 109 struct scsi_device **dt; /* ptrs to data transfer elements */ 110 u_int firsts[CH_TYPES]; 111 u_int counts[CH_TYPES]; 112 u_int unit_attention; 113 u_int voltags; 114 struct semaphore lock; 115 } scsi_changer; 116 117 static LIST_HEAD(ch_devlist); 118 static DEFINE_SPINLOCK(ch_devlist_lock); 119 static int ch_devcount; 120 121 static struct scsi_driver ch_template = 122 { 123 .owner = THIS_MODULE, 124 .gendrv = { 125 .name = "ch", 126 .probe = ch_probe, 127 .remove = ch_remove, 128 }, 129 }; 130 131 static struct file_operations changer_fops = 132 { 133 .owner = THIS_MODULE, 134 .open = ch_open, 135 .release = ch_release, 136 .ioctl = ch_ioctl, 137 #ifdef CONFIG_COMPAT 138 .compat_ioctl = ch_ioctl_compat, 139 #endif 140 }; 141 142 static const struct { 143 unsigned char sense; 144 unsigned char asc; 145 unsigned char ascq; 146 int errno; 147 } err[] = { 148 /* Just filled in what looks right. Hav'nt checked any standard paper for 149 these errno assignments, so they may be wrong... */ 150 { 151 .sense = ILLEGAL_REQUEST, 152 .asc = 0x21, 153 .ascq = 0x01, 154 .errno = EBADSLT, /* Invalid element address */ 155 },{ 156 .sense = ILLEGAL_REQUEST, 157 .asc = 0x28, 158 .ascq = 0x01, 159 .errno = EBADE, /* Import or export element accessed */ 160 },{ 161 .sense = ILLEGAL_REQUEST, 162 .asc = 0x3B, 163 .ascq = 0x0D, 164 .errno = EXFULL, /* Medium destination element full */ 165 },{ 166 .sense = ILLEGAL_REQUEST, 167 .asc = 0x3B, 168 .ascq = 0x0E, 169 .errno = EBADE, /* Medium source element empty */ 170 },{ 171 .sense = ILLEGAL_REQUEST, 172 .asc = 0x20, 173 .ascq = 0x00, 174 .errno = EBADRQC, /* Invalid command operation code */ 175 },{ 176 /* end of list */ 177 } 178 }; 179 180 /* ------------------------------------------------------------------- */ 181 182 static int ch_find_errno(struct scsi_sense_hdr *sshdr) 183 { 184 int i,errno = 0; 185 186 /* Check to see if additional sense information is available */ 187 if (scsi_sense_valid(sshdr) && 188 sshdr->asc != 0) { 189 for (i = 0; err[i].errno != 0; i++) { 190 if (err[i].sense == sshdr->sense_key && 191 err[i].asc == sshdr->asc && 192 err[i].ascq == sshdr->ascq) { 193 errno = -err[i].errno; 194 break; 195 } 196 } 197 } 198 if (errno == 0) 199 errno = -EIO; 200 return errno; 201 } 202 203 static int 204 ch_do_scsi(scsi_changer *ch, unsigned char *cmd, 205 void *buffer, unsigned buflength, 206 enum dma_data_direction direction) 207 { 208 int errno, retries = 0, timeout, result; 209 struct scsi_sense_hdr sshdr; 210 211 timeout = (cmd[0] == INITIALIZE_ELEMENT_STATUS) 212 ? timeout_init : timeout_move; 213 214 retry: 215 errno = 0; 216 if (debug) { 217 dprintk("command: "); 218 __scsi_print_command(cmd); 219 } 220 221 result = scsi_execute_req(ch->device, cmd, direction, buffer, 222 buflength, &sshdr, timeout * HZ, 223 MAX_RETRIES); 224 225 dprintk("result: 0x%x\n",result); 226 if (driver_byte(result) & DRIVER_SENSE) { 227 if (debug) 228 scsi_print_sense_hdr(ch->name, &sshdr); 229 errno = ch_find_errno(&sshdr); 230 231 switch(sshdr.sense_key) { 232 case UNIT_ATTENTION: 233 ch->unit_attention = 1; 234 if (retries++ < 3) 235 goto retry; 236 break; 237 } 238 } 239 return errno; 240 } 241 242 /* ------------------------------------------------------------------------ */ 243 244 static int 245 ch_elem_to_typecode(scsi_changer *ch, u_int elem) 246 { 247 int i; 248 249 for (i = 0; i < CH_TYPES; i++) { 250 if (elem >= ch->firsts[i] && 251 elem < ch->firsts[i] + 252 ch->counts[i]) 253 return i+1; 254 } 255 return 0; 256 } 257 258 static int 259 ch_read_element_status(scsi_changer *ch, u_int elem, char *data) 260 { 261 u_char cmd[12]; 262 u_char *buffer; 263 int result; 264 265 buffer = kmalloc(512, GFP_KERNEL | GFP_DMA); 266 if(!buffer) 267 return -ENOMEM; 268 269 retry: 270 memset(cmd,0,sizeof(cmd)); 271 cmd[0] = READ_ELEMENT_STATUS; 272 cmd[1] = (ch->device->lun << 5) | 273 (ch->voltags ? 0x10 : 0) | 274 ch_elem_to_typecode(ch,elem); 275 cmd[2] = (elem >> 8) & 0xff; 276 cmd[3] = elem & 0xff; 277 cmd[5] = 1; 278 cmd[9] = 255; 279 if (0 == (result = ch_do_scsi(ch, cmd, buffer, 256, DMA_FROM_DEVICE))) { 280 if (((buffer[16] << 8) | buffer[17]) != elem) { 281 dprintk("asked for element 0x%02x, got 0x%02x\n", 282 elem,(buffer[16] << 8) | buffer[17]); 283 kfree(buffer); 284 return -EIO; 285 } 286 memcpy(data,buffer+16,16); 287 } else { 288 if (ch->voltags) { 289 ch->voltags = 0; 290 vprintk("device has no volume tag support\n"); 291 goto retry; 292 } 293 dprintk("READ ELEMENT STATUS for element 0x%x failed\n",elem); 294 } 295 kfree(buffer); 296 return result; 297 } 298 299 static int 300 ch_init_elem(scsi_changer *ch) 301 { 302 int err; 303 u_char cmd[6]; 304 305 vprintk("INITIALIZE ELEMENT STATUS, may take some time ...\n"); 306 memset(cmd,0,sizeof(cmd)); 307 cmd[0] = INITIALIZE_ELEMENT_STATUS; 308 cmd[1] = ch->device->lun << 5; 309 err = ch_do_scsi(ch, cmd, NULL, 0, DMA_NONE); 310 vprintk("... finished\n"); 311 return err; 312 } 313 314 static int 315 ch_readconfig(scsi_changer *ch) 316 { 317 u_char cmd[10], data[16]; 318 u_char *buffer; 319 int result,id,lun,i; 320 u_int elem; 321 322 buffer = kmalloc(512, GFP_KERNEL | GFP_DMA); 323 if (!buffer) 324 return -ENOMEM; 325 memset(buffer,0,512); 326 327 memset(cmd,0,sizeof(cmd)); 328 cmd[0] = MODE_SENSE; 329 cmd[1] = ch->device->lun << 5; 330 cmd[2] = 0x1d; 331 cmd[4] = 255; 332 result = ch_do_scsi(ch, cmd, buffer, 255, DMA_FROM_DEVICE); 333 if (0 != result) { 334 cmd[1] |= (1<<3); 335 result = ch_do_scsi(ch, cmd, buffer, 255, DMA_FROM_DEVICE); 336 } 337 if (0 == result) { 338 ch->firsts[CHET_MT] = 339 (buffer[buffer[3]+ 6] << 8) | buffer[buffer[3]+ 7]; 340 ch->counts[CHET_MT] = 341 (buffer[buffer[3]+ 8] << 8) | buffer[buffer[3]+ 9]; 342 ch->firsts[CHET_ST] = 343 (buffer[buffer[3]+10] << 8) | buffer[buffer[3]+11]; 344 ch->counts[CHET_ST] = 345 (buffer[buffer[3]+12] << 8) | buffer[buffer[3]+13]; 346 ch->firsts[CHET_IE] = 347 (buffer[buffer[3]+14] << 8) | buffer[buffer[3]+15]; 348 ch->counts[CHET_IE] = 349 (buffer[buffer[3]+16] << 8) | buffer[buffer[3]+17]; 350 ch->firsts[CHET_DT] = 351 (buffer[buffer[3]+18] << 8) | buffer[buffer[3]+19]; 352 ch->counts[CHET_DT] = 353 (buffer[buffer[3]+20] << 8) | buffer[buffer[3]+21]; 354 vprintk("type #1 (mt): 0x%x+%d [medium transport]\n", 355 ch->firsts[CHET_MT], 356 ch->counts[CHET_MT]); 357 vprintk("type #2 (st): 0x%x+%d [storage]\n", 358 ch->firsts[CHET_ST], 359 ch->counts[CHET_ST]); 360 vprintk("type #3 (ie): 0x%x+%d [import/export]\n", 361 ch->firsts[CHET_IE], 362 ch->counts[CHET_IE]); 363 vprintk("type #4 (dt): 0x%x+%d [data transfer]\n", 364 ch->firsts[CHET_DT], 365 ch->counts[CHET_DT]); 366 } else { 367 vprintk("reading element address assigment page failed!\n"); 368 } 369 370 /* vendor specific element types */ 371 for (i = 0; i < 4; i++) { 372 if (0 == vendor_counts[i]) 373 continue; 374 if (NULL == vendor_labels[i]) 375 continue; 376 ch->firsts[CHET_V1+i] = vendor_firsts[i]; 377 ch->counts[CHET_V1+i] = vendor_counts[i]; 378 vprintk("type #%d (v%d): 0x%x+%d [%s, vendor specific]\n", 379 i+5,i+1,vendor_firsts[i],vendor_counts[i], 380 vendor_labels[i]); 381 } 382 383 /* look up the devices of the data transfer elements */ 384 ch->dt = kmalloc(ch->counts[CHET_DT]*sizeof(struct scsi_device), 385 GFP_KERNEL); 386 for (elem = 0; elem < ch->counts[CHET_DT]; elem++) { 387 id = -1; 388 lun = 0; 389 if (elem < CH_DT_MAX && -1 != dt_id[elem]) { 390 id = dt_id[elem]; 391 lun = dt_lun[elem]; 392 vprintk("dt 0x%x: [insmod option] ", 393 elem+ch->firsts[CHET_DT]); 394 } else if (0 != ch_read_element_status 395 (ch,elem+ch->firsts[CHET_DT],data)) { 396 vprintk("dt 0x%x: READ ELEMENT STATUS failed\n", 397 elem+ch->firsts[CHET_DT]); 398 } else { 399 vprintk("dt 0x%x: ",elem+ch->firsts[CHET_DT]); 400 if (data[6] & 0x80) { 401 if (verbose) 402 printk("not this SCSI bus\n"); 403 ch->dt[elem] = NULL; 404 } else if (0 == (data[6] & 0x30)) { 405 if (verbose) 406 printk("ID/LUN unknown\n"); 407 ch->dt[elem] = NULL; 408 } else { 409 id = ch->device->id; 410 lun = 0; 411 if (data[6] & 0x20) id = data[7]; 412 if (data[6] & 0x10) lun = data[6] & 7; 413 } 414 } 415 if (-1 != id) { 416 if (verbose) 417 printk("ID %i, LUN %i, ",id,lun); 418 ch->dt[elem] = 419 scsi_device_lookup(ch->device->host, 420 ch->device->channel, 421 id,lun); 422 if (!ch->dt[elem]) { 423 /* should not happen */ 424 if (verbose) 425 printk("Huh? device not found!\n"); 426 } else { 427 if (verbose) 428 printk("name: %8.8s %16.16s %4.4s\n", 429 ch->dt[elem]->vendor, 430 ch->dt[elem]->model, 431 ch->dt[elem]->rev); 432 } 433 } 434 } 435 ch->voltags = 1; 436 kfree(buffer); 437 438 return 0; 439 } 440 441 /* ------------------------------------------------------------------------ */ 442 443 static int 444 ch_position(scsi_changer *ch, u_int trans, u_int elem, int rotate) 445 { 446 u_char cmd[10]; 447 448 dprintk("position: 0x%x\n",elem); 449 if (0 == trans) 450 trans = ch->firsts[CHET_MT]; 451 memset(cmd,0,sizeof(cmd)); 452 cmd[0] = POSITION_TO_ELEMENT; 453 cmd[1] = ch->device->lun << 5; 454 cmd[2] = (trans >> 8) & 0xff; 455 cmd[3] = trans & 0xff; 456 cmd[4] = (elem >> 8) & 0xff; 457 cmd[5] = elem & 0xff; 458 cmd[8] = rotate ? 1 : 0; 459 return ch_do_scsi(ch, cmd, NULL, 0, DMA_NONE); 460 } 461 462 static int 463 ch_move(scsi_changer *ch, u_int trans, u_int src, u_int dest, int rotate) 464 { 465 u_char cmd[12]; 466 467 dprintk("move: 0x%x => 0x%x\n",src,dest); 468 if (0 == trans) 469 trans = ch->firsts[CHET_MT]; 470 memset(cmd,0,sizeof(cmd)); 471 cmd[0] = MOVE_MEDIUM; 472 cmd[1] = ch->device->lun << 5; 473 cmd[2] = (trans >> 8) & 0xff; 474 cmd[3] = trans & 0xff; 475 cmd[4] = (src >> 8) & 0xff; 476 cmd[5] = src & 0xff; 477 cmd[6] = (dest >> 8) & 0xff; 478 cmd[7] = dest & 0xff; 479 cmd[10] = rotate ? 1 : 0; 480 return ch_do_scsi(ch, cmd, NULL,0, DMA_NONE); 481 } 482 483 static int 484 ch_exchange(scsi_changer *ch, u_int trans, u_int src, 485 u_int dest1, u_int dest2, int rotate1, int rotate2) 486 { 487 u_char cmd[12]; 488 489 dprintk("exchange: 0x%x => 0x%x => 0x%x\n", 490 src,dest1,dest2); 491 if (0 == trans) 492 trans = ch->firsts[CHET_MT]; 493 memset(cmd,0,sizeof(cmd)); 494 cmd[0] = EXCHANGE_MEDIUM; 495 cmd[1] = ch->device->lun << 5; 496 cmd[2] = (trans >> 8) & 0xff; 497 cmd[3] = trans & 0xff; 498 cmd[4] = (src >> 8) & 0xff; 499 cmd[5] = src & 0xff; 500 cmd[6] = (dest1 >> 8) & 0xff; 501 cmd[7] = dest1 & 0xff; 502 cmd[8] = (dest2 >> 8) & 0xff; 503 cmd[9] = dest2 & 0xff; 504 cmd[10] = (rotate1 ? 1 : 0) | (rotate2 ? 2 : 0); 505 506 return ch_do_scsi(ch, cmd, NULL,0, DMA_NONE); 507 } 508 509 static void 510 ch_check_voltag(char *tag) 511 { 512 int i; 513 514 for (i = 0; i < 32; i++) { 515 /* restrict to ascii */ 516 if (tag[i] >= 0x7f || tag[i] < 0x20) 517 tag[i] = ' '; 518 /* don't allow search wildcards */ 519 if (tag[i] == '?' || 520 tag[i] == '*') 521 tag[i] = ' '; 522 } 523 } 524 525 static int 526 ch_set_voltag(scsi_changer *ch, u_int elem, 527 int alternate, int clear, u_char *tag) 528 { 529 u_char cmd[12]; 530 u_char *buffer; 531 int result; 532 533 buffer = kmalloc(512, GFP_KERNEL); 534 if (!buffer) 535 return -ENOMEM; 536 memset(buffer,0,512); 537 538 dprintk("%s %s voltag: 0x%x => \"%s\"\n", 539 clear ? "clear" : "set", 540 alternate ? "alternate" : "primary", 541 elem, tag); 542 memset(cmd,0,sizeof(cmd)); 543 cmd[0] = SEND_VOLUME_TAG; 544 cmd[1] = (ch->device->lun << 5) | 545 ch_elem_to_typecode(ch,elem); 546 cmd[2] = (elem >> 8) & 0xff; 547 cmd[3] = elem & 0xff; 548 cmd[5] = clear 549 ? (alternate ? 0x0d : 0x0c) 550 : (alternate ? 0x0b : 0x0a); 551 552 cmd[9] = 255; 553 554 memcpy(buffer,tag,32); 555 ch_check_voltag(buffer); 556 557 result = ch_do_scsi(ch, cmd, buffer, 256, DMA_TO_DEVICE); 558 kfree(buffer); 559 return result; 560 } 561 562 static int ch_gstatus(scsi_changer *ch, int type, unsigned char __user *dest) 563 { 564 int retval = 0; 565 u_char data[16]; 566 unsigned int i; 567 568 down(&ch->lock); 569 for (i = 0; i < ch->counts[type]; i++) { 570 if (0 != ch_read_element_status 571 (ch, ch->firsts[type]+i,data)) { 572 retval = -EIO; 573 break; 574 } 575 put_user(data[2], dest+i); 576 if (data[2] & CESTATUS_EXCEPT) 577 vprintk("element 0x%x: asc=0x%x, ascq=0x%x\n", 578 ch->firsts[type]+i, 579 (int)data[4],(int)data[5]); 580 retval = ch_read_element_status 581 (ch, ch->firsts[type]+i,data); 582 if (0 != retval) 583 break; 584 } 585 up(&ch->lock); 586 return retval; 587 } 588 589 /* ------------------------------------------------------------------------ */ 590 591 static int 592 ch_release(struct inode *inode, struct file *file) 593 { 594 scsi_changer *ch = file->private_data; 595 596 scsi_device_put(ch->device); 597 file->private_data = NULL; 598 return 0; 599 } 600 601 static int 602 ch_open(struct inode *inode, struct file *file) 603 { 604 scsi_changer *tmp, *ch; 605 int minor = iminor(inode); 606 607 spin_lock(&ch_devlist_lock); 608 ch = NULL; 609 list_for_each_entry(tmp,&ch_devlist,list) { 610 if (tmp->minor == minor) 611 ch = tmp; 612 } 613 if (NULL == ch || scsi_device_get(ch->device)) { 614 spin_unlock(&ch_devlist_lock); 615 return -ENXIO; 616 } 617 spin_unlock(&ch_devlist_lock); 618 619 file->private_data = ch; 620 return 0; 621 } 622 623 static int 624 ch_checkrange(scsi_changer *ch, unsigned int type, unsigned int unit) 625 { 626 if (type >= CH_TYPES || unit >= ch->counts[type]) 627 return -1; 628 return 0; 629 } 630 631 static int ch_ioctl(struct inode * inode, struct file * file, 632 unsigned int cmd, unsigned long arg) 633 { 634 scsi_changer *ch = file->private_data; 635 int retval; 636 void __user *argp = (void __user *)arg; 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(argp, ¶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(argp, &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, argp, 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, argp, 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, argp, 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, argp, 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, argp, 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(argp, &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, argp, 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, argp); 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 __user *data; 898 899 if (copy_from_user(&ces32, (void __user *)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, NULL, 939 MKDEV(SCSI_CHANGER_MAJOR,ch->minor), 940 dev, "s%s", ch->name); 941 942 sdev_printk(KERN_INFO, sd, "Attached scsi changer %s\n", ch->name); 943 944 spin_lock(&ch_devlist_lock); 945 list_add_tail(&ch->list,&ch_devlist); 946 ch_devcount++; 947 spin_unlock(&ch_devlist_lock); 948 return 0; 949 } 950 951 static int ch_remove(struct device *dev) 952 { 953 struct scsi_device *sd = to_scsi_device(dev); 954 scsi_changer *tmp, *ch; 955 956 spin_lock(&ch_devlist_lock); 957 ch = NULL; 958 list_for_each_entry(tmp,&ch_devlist,list) { 959 if (tmp->device == sd) 960 ch = tmp; 961 } 962 BUG_ON(NULL == ch); 963 list_del(&ch->list); 964 spin_unlock(&ch_devlist_lock); 965 966 class_device_destroy(ch_sysfs_class, 967 MKDEV(SCSI_CHANGER_MAJOR,ch->minor)); 968 kfree(ch->dt); 969 kfree(ch); 970 ch_devcount--; 971 return 0; 972 } 973 974 static int __init init_ch_module(void) 975 { 976 int rc; 977 978 printk(KERN_INFO "SCSI Media Changer driver v" VERSION " \n"); 979 ch_sysfs_class = class_create(THIS_MODULE, "scsi_changer"); 980 if (IS_ERR(ch_sysfs_class)) { 981 rc = PTR_ERR(ch_sysfs_class); 982 return rc; 983 } 984 rc = register_chrdev(SCSI_CHANGER_MAJOR,"ch",&changer_fops); 985 if (rc < 0) { 986 printk("Unable to get major %d for SCSI-Changer\n", 987 SCSI_CHANGER_MAJOR); 988 goto fail1; 989 } 990 rc = scsi_register_driver(&ch_template.gendrv); 991 if (rc < 0) 992 goto fail2; 993 return 0; 994 995 fail2: 996 unregister_chrdev(SCSI_CHANGER_MAJOR, "ch"); 997 fail1: 998 class_destroy(ch_sysfs_class); 999 return rc; 1000 } 1001 1002 static void __exit exit_ch_module(void) 1003 { 1004 scsi_unregister_driver(&ch_template.gendrv); 1005 unregister_chrdev(SCSI_CHANGER_MAJOR, "ch"); 1006 class_destroy(ch_sysfs_class); 1007 } 1008 1009 module_init(init_ch_module); 1010 module_exit(exit_ch_module); 1011 1012 /* 1013 * Local variables: 1014 * c-basic-offset: 8 1015 * End: 1016 */ 1017