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/module.h> 11#include <linux/init.h> 12#include <linux/fs.h> 13#include <linux/kernel.h> 14#include <linux/mm.h> 15#include <linux/major.h> 16#include <linux/string.h> 17#include <linux/errno.h> 18#include <linux/interrupt.h> 19#include <linux/blkdev.h> 20#include <linux/completion.h> 21#include <linux/compat.h> 22#include <linux/chio.h> /* here are all the ioctls */ 23#include <linux/mutex.h> 24 25#include <scsi/scsi.h> 26#include <scsi/scsi_cmnd.h> 27#include <scsi/scsi_driver.h> 28#include <scsi/scsi_ioctl.h> 29#include <scsi/scsi_host.h> 30#include <scsi/scsi_device.h> 31#include <scsi/scsi_eh.h> 32#include <scsi/scsi_dbg.h> 33 34#define CH_DT_MAX 16 35#define CH_TYPES 8 36 37MODULE_DESCRIPTION("device driver for scsi media changer devices"); 38MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org>"); 39MODULE_LICENSE("GPL"); 40MODULE_ALIAS_CHARDEV_MAJOR(SCSI_CHANGER_MAJOR); 41 42static int init = 1; 43module_param(init, int, 0444); 44MODULE_PARM_DESC(init, \ 45 "initialize element status on driver load (default: on)"); 46 47static int timeout_move = 300; 48module_param(timeout_move, int, 0644); 49MODULE_PARM_DESC(timeout_move,"timeout for move commands " 50 "(default: 300 seconds)"); 51 52static int timeout_init = 3600; 53module_param(timeout_init, int, 0644); 54MODULE_PARM_DESC(timeout_init,"timeout for INITIALIZE ELEMENT STATUS " 55 "(default: 3600 seconds)"); 56 57static int verbose = 1; 58module_param(verbose, int, 0644); 59MODULE_PARM_DESC(verbose,"be verbose (default: on)"); 60 61static int debug = 0; 62module_param(debug, int, 0644); 63MODULE_PARM_DESC(debug,"enable/disable debug messages, also prints more " 64 "detailed sense codes on scsi errors (default: off)"); 65 66static int dt_id[CH_DT_MAX] = { [ 0 ... (CH_DT_MAX-1) ] = -1 }; 67static int dt_lun[CH_DT_MAX]; 68module_param_array(dt_id, int, NULL, 0444); 69module_param_array(dt_lun, int, NULL, 0444); 70 71/* tell the driver about vendor-specific slots */ 72static int vendor_firsts[CH_TYPES-4]; 73static int vendor_counts[CH_TYPES-4]; 74module_param_array(vendor_firsts, int, NULL, 0444); 75module_param_array(vendor_counts, int, NULL, 0444); 76 77static 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 91static int ch_probe(struct device *); 92static int ch_remove(struct device *); 93static int ch_open(struct inode * inode, struct file * filp); 94static int ch_release(struct inode * inode, struct file * filp); 95static int ch_ioctl(struct inode * inode, struct file * filp, 96 unsigned int cmd, unsigned long arg); 97#ifdef CONFIG_COMPAT 98static long ch_ioctl_compat(struct file * filp, 99 unsigned int cmd, unsigned long arg); 100#endif 101 102static struct class * ch_sysfs_class; 103 104typedef 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 mutex lock; 115} scsi_changer; 116 117static LIST_HEAD(ch_devlist); 118static DEFINE_SPINLOCK(ch_devlist_lock); 119static int ch_devcount; 120 121static 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 131static const 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 142static 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 182static 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 203static int 204ch_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 244static int 245ch_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 258static int 259ch_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 299static int 300ch_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 314static int 315ch_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 = kzalloc(512, GFP_KERNEL | GFP_DMA); 323 if (!buffer) 324 return -ENOMEM; 325 326 memset(cmd,0,sizeof(cmd)); 327 cmd[0] = MODE_SENSE; 328 cmd[1] = ch->device->lun << 5; 329 cmd[2] = 0x1d; 330 cmd[4] = 255; 331 result = ch_do_scsi(ch, cmd, buffer, 255, DMA_FROM_DEVICE); 332 if (0 != result) { 333 cmd[1] |= (1<<3); 334 result = ch_do_scsi(ch, cmd, buffer, 255, DMA_FROM_DEVICE); 335 } 336 if (0 == result) { 337 ch->firsts[CHET_MT] = 338 (buffer[buffer[3]+ 6] << 8) | buffer[buffer[3]+ 7]; 339 ch->counts[CHET_MT] = 340 (buffer[buffer[3]+ 8] << 8) | buffer[buffer[3]+ 9]; 341 ch->firsts[CHET_ST] = 342 (buffer[buffer[3]+10] << 8) | buffer[buffer[3]+11]; 343 ch->counts[CHET_ST] = 344 (buffer[buffer[3]+12] << 8) | buffer[buffer[3]+13]; 345 ch->firsts[CHET_IE] = 346 (buffer[buffer[3]+14] << 8) | buffer[buffer[3]+15]; 347 ch->counts[CHET_IE] = 348 (buffer[buffer[3]+16] << 8) | buffer[buffer[3]+17]; 349 ch->firsts[CHET_DT] = 350 (buffer[buffer[3]+18] << 8) | buffer[buffer[3]+19]; 351 ch->counts[CHET_DT] = 352 (buffer[buffer[3]+20] << 8) | buffer[buffer[3]+21]; 353 vprintk("type #1 (mt): 0x%x+%d [medium transport]\n", 354 ch->firsts[CHET_MT], 355 ch->counts[CHET_MT]); 356 vprintk("type #2 (st): 0x%x+%d [storage]\n", 357 ch->firsts[CHET_ST], 358 ch->counts[CHET_ST]); 359 vprintk("type #3 (ie): 0x%x+%d [import/export]\n", 360 ch->firsts[CHET_IE], 361 ch->counts[CHET_IE]); 362 vprintk("type #4 (dt): 0x%x+%d [data transfer]\n", 363 ch->firsts[CHET_DT], 364 ch->counts[CHET_DT]); 365 } else { 366 vprintk("reading element address assigment page failed!\n"); 367 } 368 369 /* vendor specific element types */ 370 for (i = 0; i < 4; i++) { 371 if (0 == vendor_counts[i]) 372 continue; 373 if (NULL == vendor_labels[i]) 374 continue; 375 ch->firsts[CHET_V1+i] = vendor_firsts[i]; 376 ch->counts[CHET_V1+i] = vendor_counts[i]; 377 vprintk("type #%d (v%d): 0x%x+%d [%s, vendor specific]\n", 378 i+5,i+1,vendor_firsts[i],vendor_counts[i], 379 vendor_labels[i]); 380 } 381 382 /* look up the devices of the data transfer elements */ 383 ch->dt = kmalloc(ch->counts[CHET_DT]*sizeof(struct scsi_device), 384 GFP_KERNEL); 385 for (elem = 0; elem < ch->counts[CHET_DT]; elem++) { 386 id = -1; 387 lun = 0; 388 if (elem < CH_DT_MAX && -1 != dt_id[elem]) { 389 id = dt_id[elem]; 390 lun = dt_lun[elem]; 391 vprintk("dt 0x%x: [insmod option] ", 392 elem+ch->firsts[CHET_DT]); 393 } else if (0 != ch_read_element_status 394 (ch,elem+ch->firsts[CHET_DT],data)) { 395 vprintk("dt 0x%x: READ ELEMENT STATUS failed\n", 396 elem+ch->firsts[CHET_DT]); 397 } else { 398 vprintk("dt 0x%x: ",elem+ch->firsts[CHET_DT]); 399 if (data[6] & 0x80) { 400 if (verbose) 401 printk("not this SCSI bus\n"); 402 ch->dt[elem] = NULL; 403 } else if (0 == (data[6] & 0x30)) { 404 if (verbose) 405 printk("ID/LUN unknown\n"); 406 ch->dt[elem] = NULL; 407 } else { 408 id = ch->device->id; 409 lun = 0; 410 if (data[6] & 0x20) id = data[7]; 411 if (data[6] & 0x10) lun = data[6] & 7; 412 } 413 } 414 if (-1 != id) { 415 if (verbose) 416 printk("ID %i, LUN %i, ",id,lun); 417 ch->dt[elem] = 418 scsi_device_lookup(ch->device->host, 419 ch->device->channel, 420 id,lun); 421 if (!ch->dt[elem]) { 422 /* should not happen */ 423 if (verbose) 424 printk("Huh? device not found!\n"); 425 } else { 426 if (verbose) 427 printk("name: %8.8s %16.16s %4.4s\n", 428 ch->dt[elem]->vendor, 429 ch->dt[elem]->model, 430 ch->dt[elem]->rev); 431 } 432 } 433 } 434 ch->voltags = 1; 435 kfree(buffer); 436 437 return 0; 438} 439 440/* ------------------------------------------------------------------------ */ 441 442static int 443ch_position(scsi_changer *ch, u_int trans, u_int elem, int rotate) 444{ 445 u_char cmd[10]; 446 447 dprintk("position: 0x%x\n",elem); 448 if (0 == trans) 449 trans = ch->firsts[CHET_MT]; 450 memset(cmd,0,sizeof(cmd)); 451 cmd[0] = POSITION_TO_ELEMENT; 452 cmd[1] = ch->device->lun << 5; 453 cmd[2] = (trans >> 8) & 0xff; 454 cmd[3] = trans & 0xff; 455 cmd[4] = (elem >> 8) & 0xff; 456 cmd[5] = elem & 0xff; 457 cmd[8] = rotate ? 1 : 0; 458 return ch_do_scsi(ch, cmd, NULL, 0, DMA_NONE); 459} 460 461static int 462ch_move(scsi_changer *ch, u_int trans, u_int src, u_int dest, int rotate) 463{ 464 u_char cmd[12]; 465 466 dprintk("move: 0x%x => 0x%x\n",src,dest); 467 if (0 == trans) 468 trans = ch->firsts[CHET_MT]; 469 memset(cmd,0,sizeof(cmd)); 470 cmd[0] = MOVE_MEDIUM; 471 cmd[1] = ch->device->lun << 5; 472 cmd[2] = (trans >> 8) & 0xff; 473 cmd[3] = trans & 0xff; 474 cmd[4] = (src >> 8) & 0xff; 475 cmd[5] = src & 0xff; 476 cmd[6] = (dest >> 8) & 0xff; 477 cmd[7] = dest & 0xff; 478 cmd[10] = rotate ? 1 : 0; 479 return ch_do_scsi(ch, cmd, NULL,0, DMA_NONE); 480} 481 482static int 483ch_exchange(scsi_changer *ch, u_int trans, u_int src, 484 u_int dest1, u_int dest2, int rotate1, int rotate2) 485{ 486 u_char cmd[12]; 487 488 dprintk("exchange: 0x%x => 0x%x => 0x%x\n", 489 src,dest1,dest2); 490 if (0 == trans) 491 trans = ch->firsts[CHET_MT]; 492 memset(cmd,0,sizeof(cmd)); 493 cmd[0] = EXCHANGE_MEDIUM; 494 cmd[1] = ch->device->lun << 5; 495 cmd[2] = (trans >> 8) & 0xff; 496 cmd[3] = trans & 0xff; 497 cmd[4] = (src >> 8) & 0xff; 498 cmd[5] = src & 0xff; 499 cmd[6] = (dest1 >> 8) & 0xff; 500 cmd[7] = dest1 & 0xff; 501 cmd[8] = (dest2 >> 8) & 0xff; 502 cmd[9] = dest2 & 0xff; 503 cmd[10] = (rotate1 ? 1 : 0) | (rotate2 ? 2 : 0); 504 505 return ch_do_scsi(ch, cmd, NULL,0, DMA_NONE); 506} 507 508static void 509ch_check_voltag(char *tag) 510{ 511 int i; 512 513 for (i = 0; i < 32; i++) { 514 /* restrict to ascii */ 515 if (tag[i] >= 0x7f || tag[i] < 0x20) 516 tag[i] = ' '; 517 /* don't allow search wildcards */ 518 if (tag[i] == '?' || 519 tag[i] == '*') 520 tag[i] = ' '; 521 } 522} 523 524static int 525ch_set_voltag(scsi_changer *ch, u_int elem, 526 int alternate, int clear, u_char *tag) 527{ 528 u_char cmd[12]; 529 u_char *buffer; 530 int result; 531 532 buffer = kzalloc(512, GFP_KERNEL); 533 if (!buffer) 534 return -ENOMEM; 535 536 dprintk("%s %s voltag: 0x%x => \"%s\"\n", 537 clear ? "clear" : "set", 538 alternate ? "alternate" : "primary", 539 elem, tag); 540 memset(cmd,0,sizeof(cmd)); 541 cmd[0] = SEND_VOLUME_TAG; 542 cmd[1] = (ch->device->lun << 5) | 543 ch_elem_to_typecode(ch,elem); 544 cmd[2] = (elem >> 8) & 0xff; 545 cmd[3] = elem & 0xff; 546 cmd[5] = clear 547 ? (alternate ? 0x0d : 0x0c) 548 : (alternate ? 0x0b : 0x0a); 549 550 cmd[9] = 255; 551 552 memcpy(buffer,tag,32); 553 ch_check_voltag(buffer); 554 555 result = ch_do_scsi(ch, cmd, buffer, 256, DMA_TO_DEVICE); 556 kfree(buffer); 557 return result; 558} 559 560static int ch_gstatus(scsi_changer *ch, int type, unsigned char __user *dest) 561{ 562 int retval = 0; 563 u_char data[16]; 564 unsigned int i; 565 566 mutex_lock(&ch->lock); 567 for (i = 0; i < ch->counts[type]; i++) { 568 if (0 != ch_read_element_status 569 (ch, ch->firsts[type]+i,data)) { 570 retval = -EIO; 571 break; 572 } 573 put_user(data[2], dest+i); 574 if (data[2] & CESTATUS_EXCEPT) 575 vprintk("element 0x%x: asc=0x%x, ascq=0x%x\n", 576 ch->firsts[type]+i, 577 (int)data[4],(int)data[5]); 578 retval = ch_read_element_status 579 (ch, ch->firsts[type]+i,data); 580 if (0 != retval) 581 break; 582 } 583 mutex_unlock(&ch->lock); 584 return retval; 585} 586 587/* ------------------------------------------------------------------------ */ 588 589static int 590ch_release(struct inode *inode, struct file *file) 591{ 592 scsi_changer *ch = file->private_data; 593 594 scsi_device_put(ch->device); 595 file->private_data = NULL; 596 return 0; 597} 598 599static int 600ch_open(struct inode *inode, struct file *file) 601{ 602 scsi_changer *tmp, *ch; 603 int minor = iminor(inode); 604 605 spin_lock(&ch_devlist_lock); 606 ch = NULL; 607 list_for_each_entry(tmp,&ch_devlist,list) { 608 if (tmp->minor == minor) 609 ch = tmp; 610 } 611 if (NULL == ch || scsi_device_get(ch->device)) { 612 spin_unlock(&ch_devlist_lock); 613 return -ENXIO; 614 } 615 spin_unlock(&ch_devlist_lock); 616 617 file->private_data = ch; 618 return 0; 619} 620 621static int 622ch_checkrange(scsi_changer *ch, unsigned int type, unsigned int unit) 623{ 624 if (type >= CH_TYPES || unit >= ch->counts[type]) 625 return -1; 626 return 0; 627} 628 629static int ch_ioctl(struct inode * inode, struct file * file, 630 unsigned int cmd, unsigned long arg) 631{ 632 scsi_changer *ch = file->private_data; 633 int retval; 634 void __user *argp = (void __user *)arg; 635 636 switch (cmd) { 637 case CHIOGPARAMS: 638 { 639 struct changer_params params; 640 641 params.cp_curpicker = 0; 642 params.cp_npickers = ch->counts[CHET_MT]; 643 params.cp_nslots = ch->counts[CHET_ST]; 644 params.cp_nportals = ch->counts[CHET_IE]; 645 params.cp_ndrives = ch->counts[CHET_DT]; 646 647 if (copy_to_user(argp, ¶ms, sizeof(params))) 648 return -EFAULT; 649 return 0; 650 } 651 case CHIOGVPARAMS: 652 { 653 struct changer_vendor_params vparams; 654 655 memset(&vparams,0,sizeof(vparams)); 656 if (ch->counts[CHET_V1]) { 657 vparams.cvp_n1 = ch->counts[CHET_V1]; 658 strncpy(vparams.cvp_label1,vendor_labels[0],16); 659 } 660 if (ch->counts[CHET_V2]) { 661 vparams.cvp_n2 = ch->counts[CHET_V2]; 662 strncpy(vparams.cvp_label2,vendor_labels[1],16); 663 } 664 if (ch->counts[CHET_V3]) { 665 vparams.cvp_n3 = ch->counts[CHET_V3]; 666 strncpy(vparams.cvp_label3,vendor_labels[2],16); 667 } 668 if (ch->counts[CHET_V4]) { 669 vparams.cvp_n4 = ch->counts[CHET_V4]; 670 strncpy(vparams.cvp_label4,vendor_labels[3],16); 671 } 672 if (copy_to_user(argp, &vparams, sizeof(vparams))) 673 return -EFAULT; 674 return 0; 675 } 676 677 case CHIOPOSITION: 678 { 679 struct changer_position pos; 680 681 if (copy_from_user(&pos, argp, sizeof (pos))) 682 return -EFAULT; 683 684 if (0 != ch_checkrange(ch, pos.cp_type, pos.cp_unit)) { 685 dprintk("CHIOPOSITION: invalid parameter\n"); 686 return -EBADSLT; 687 } 688 mutex_lock(&ch->lock); 689 retval = ch_position(ch,0, 690 ch->firsts[pos.cp_type] + pos.cp_unit, 691 pos.cp_flags & CP_INVERT); 692 mutex_unlock(&ch->lock); 693 return retval; 694 } 695 696 case CHIOMOVE: 697 { 698 struct changer_move mv; 699 700 if (copy_from_user(&mv, argp, sizeof (mv))) 701 return -EFAULT; 702 703 if (0 != ch_checkrange(ch, mv.cm_fromtype, mv.cm_fromunit) || 704 0 != ch_checkrange(ch, mv.cm_totype, mv.cm_tounit )) { 705 dprintk("CHIOMOVE: invalid parameter\n"); 706 return -EBADSLT; 707 } 708 709 mutex_lock(&ch->lock); 710 retval = ch_move(ch,0, 711 ch->firsts[mv.cm_fromtype] + mv.cm_fromunit, 712 ch->firsts[mv.cm_totype] + mv.cm_tounit, 713 mv.cm_flags & CM_INVERT); 714 mutex_unlock(&ch->lock); 715 return retval; 716 } 717 718 case CHIOEXCHANGE: 719 { 720 struct changer_exchange mv; 721 722 if (copy_from_user(&mv, argp, sizeof (mv))) 723 return -EFAULT; 724 725 if (0 != ch_checkrange(ch, mv.ce_srctype, mv.ce_srcunit ) || 726 0 != ch_checkrange(ch, mv.ce_fdsttype, mv.ce_fdstunit) || 727 0 != ch_checkrange(ch, mv.ce_sdsttype, mv.ce_sdstunit)) { 728 dprintk("CHIOEXCHANGE: invalid parameter\n"); 729 return -EBADSLT; 730 } 731 732 mutex_lock(&ch->lock); 733 retval = ch_exchange 734 (ch,0, 735 ch->firsts[mv.ce_srctype] + mv.ce_srcunit, 736 ch->firsts[mv.ce_fdsttype] + mv.ce_fdstunit, 737 ch->firsts[mv.ce_sdsttype] + mv.ce_sdstunit, 738 mv.ce_flags & CE_INVERT1, mv.ce_flags & CE_INVERT2); 739 mutex_unlock(&ch->lock); 740 return retval; 741 } 742 743 case CHIOGSTATUS: 744 { 745 struct changer_element_status ces; 746 747 if (copy_from_user(&ces, argp, sizeof (ces))) 748 return -EFAULT; 749 if (ces.ces_type < 0 || ces.ces_type >= CH_TYPES) 750 return -EINVAL; 751 752 return ch_gstatus(ch, ces.ces_type, ces.ces_data); 753 } 754 755 case CHIOGELEM: 756 { 757 struct changer_get_element cge; 758 u_char cmd[12]; 759 u_char *buffer; 760 unsigned int elem; 761 int result,i; 762 763 if (copy_from_user(&cge, argp, sizeof (cge))) 764 return -EFAULT; 765 766 if (0 != ch_checkrange(ch, cge.cge_type, cge.cge_unit)) 767 return -EINVAL; 768 elem = ch->firsts[cge.cge_type] + cge.cge_unit; 769 770 buffer = kmalloc(512, GFP_KERNEL | GFP_DMA); 771 if (!buffer) 772 return -ENOMEM; 773 mutex_lock(&ch->lock); 774 775 voltag_retry: 776 memset(cmd,0,sizeof(cmd)); 777 cmd[0] = READ_ELEMENT_STATUS; 778 cmd[1] = (ch->device->lun << 5) | 779 (ch->voltags ? 0x10 : 0) | 780 ch_elem_to_typecode(ch,elem); 781 cmd[2] = (elem >> 8) & 0xff; 782 cmd[3] = elem & 0xff; 783 cmd[5] = 1; 784 cmd[9] = 255; 785 786 if (0 == (result = ch_do_scsi(ch, cmd, buffer, 256, DMA_FROM_DEVICE))) { 787 cge.cge_status = buffer[18]; 788 cge.cge_flags = 0; 789 if (buffer[18] & CESTATUS_EXCEPT) { 790 cge.cge_errno = EIO; 791 } 792 if (buffer[25] & 0x80) { 793 cge.cge_flags |= CGE_SRC; 794 if (buffer[25] & 0x40) 795 cge.cge_flags |= CGE_INVERT; 796 elem = (buffer[26]<<8) | buffer[27]; 797 for (i = 0; i < 4; i++) { 798 if (elem >= ch->firsts[i] && 799 elem < ch->firsts[i] + ch->counts[i]) { 800 cge.cge_srctype = i; 801 cge.cge_srcunit = elem-ch->firsts[i]; 802 } 803 } 804 } 805 if ((buffer[22] & 0x30) == 0x30) { 806 cge.cge_flags |= CGE_IDLUN; 807 cge.cge_id = buffer[23]; 808 cge.cge_lun = buffer[22] & 7; 809 } 810 if (buffer[9] & 0x80) { 811 cge.cge_flags |= CGE_PVOLTAG; 812 memcpy(cge.cge_pvoltag,buffer+28,36); 813 } 814 if (buffer[9] & 0x40) { 815 cge.cge_flags |= CGE_AVOLTAG; 816 memcpy(cge.cge_avoltag,buffer+64,36); 817 } 818 } else if (ch->voltags) { 819 ch->voltags = 0; 820 vprintk("device has no volume tag support\n"); 821 goto voltag_retry; 822 } 823 kfree(buffer); 824 mutex_unlock(&ch->lock); 825 826 if (copy_to_user(argp, &cge, sizeof (cge))) 827 return -EFAULT; 828 return result; 829 } 830 831 case CHIOINITELEM: 832 { 833 mutex_lock(&ch->lock); 834 retval = ch_init_elem(ch); 835 mutex_unlock(&ch->lock); 836 return retval; 837 } 838 839 case CHIOSVOLTAG: 840 { 841 struct changer_set_voltag csv; 842 int elem; 843 844 if (copy_from_user(&csv, argp, sizeof(csv))) 845 return -EFAULT; 846 847 if (0 != ch_checkrange(ch, csv.csv_type, csv.csv_unit)) { 848 dprintk("CHIOSVOLTAG: invalid parameter\n"); 849 return -EBADSLT; 850 } 851 elem = ch->firsts[csv.csv_type] + csv.csv_unit; 852 mutex_lock(&ch->lock); 853 retval = ch_set_voltag(ch, elem, 854 csv.csv_flags & CSV_AVOLTAG, 855 csv.csv_flags & CSV_CLEARTAG, 856 csv.csv_voltag); 857 mutex_unlock(&ch->lock); 858 return retval; 859 } 860 861 default: 862 return scsi_ioctl(ch->device, cmd, argp); 863 864 } 865} 866 867#ifdef CONFIG_COMPAT 868 869struct changer_element_status32 { 870 int ces_type; 871 compat_uptr_t ces_data; 872}; 873#define CHIOGSTATUS32 _IOW('c', 8,struct changer_element_status32) 874 875static long ch_ioctl_compat(struct file * file, 876 unsigned int cmd, unsigned long arg) 877{ 878 scsi_changer *ch = file->private_data; 879 880 switch (cmd) { 881 case CHIOGPARAMS: 882 case CHIOGVPARAMS: 883 case CHIOPOSITION: 884 case CHIOMOVE: 885 case CHIOEXCHANGE: 886 case CHIOGELEM: 887 case CHIOINITELEM: 888 case CHIOSVOLTAG: 889 /* compatible */ 890 return ch_ioctl(NULL /* inode, unused */, 891 file, cmd, arg); 892 case CHIOGSTATUS32: 893 { 894 struct changer_element_status32 ces32; 895 unsigned char __user *data; 896 897 if (copy_from_user(&ces32, (void __user *)arg, sizeof (ces32))) 898 return -EFAULT; 899 if (ces32.ces_type < 0 || ces32.ces_type >= CH_TYPES) 900 return -EINVAL; 901 902 data = compat_ptr(ces32.ces_data); 903 return ch_gstatus(ch, ces32.ces_type, data); 904 } 905 default: 906 // return scsi_ioctl_compat(ch->device, cmd, (void*)arg); 907 return -ENOIOCTLCMD; 908 909 } 910} 911#endif 912 913/* ------------------------------------------------------------------------ */ 914 915static int ch_probe(struct device *dev) 916{ 917 struct scsi_device *sd = to_scsi_device(dev); 918 scsi_changer *ch; 919 920 if (sd->type != TYPE_MEDIUM_CHANGER) 921 return -ENODEV; 922 923 ch = kzalloc(sizeof(*ch), GFP_KERNEL); 924 if (NULL == ch) 925 return -ENOMEM; 926 927 ch->minor = ch_devcount; 928 sprintf(ch->name,"ch%d",ch->minor); 929 mutex_init(&ch->lock); 930 ch->device = sd; 931 ch_readconfig(ch); 932 if (init) 933 ch_init_elem(ch); 934 935 class_device_create(ch_sysfs_class, NULL, 936 MKDEV(SCSI_CHANGER_MAJOR,ch->minor), 937 dev, "s%s", ch->name); 938 939 sdev_printk(KERN_INFO, sd, "Attached scsi changer %s\n", ch->name); 940 941 spin_lock(&ch_devlist_lock); 942 list_add_tail(&ch->list,&ch_devlist); 943 ch_devcount++; 944 spin_unlock(&ch_devlist_lock); 945 return 0; 946} 947 948static int ch_remove(struct device *dev) 949{ 950 struct scsi_device *sd = to_scsi_device(dev); 951 scsi_changer *tmp, *ch; 952 953 spin_lock(&ch_devlist_lock); 954 ch = NULL; 955 list_for_each_entry(tmp,&ch_devlist,list) { 956 if (tmp->device == sd) 957 ch = tmp; 958 } 959 BUG_ON(NULL == ch); 960 list_del(&ch->list); 961 spin_unlock(&ch_devlist_lock); 962 963 class_device_destroy(ch_sysfs_class, 964 MKDEV(SCSI_CHANGER_MAJOR,ch->minor)); 965 kfree(ch->dt); 966 kfree(ch); 967 ch_devcount--; 968 return 0; 969} 970 971static int __init init_ch_module(void) 972{ 973 int rc; 974 975 printk(KERN_INFO "SCSI Media Changer driver v" VERSION " \n"); 976 ch_sysfs_class = class_create(THIS_MODULE, "scsi_changer"); 977 if (IS_ERR(ch_sysfs_class)) { 978 rc = PTR_ERR(ch_sysfs_class); 979 return rc; 980 } 981 rc = register_chrdev(SCSI_CHANGER_MAJOR,"ch",&changer_fops); 982 if (rc < 0) { 983 printk("Unable to get major %d for SCSI-Changer\n", 984 SCSI_CHANGER_MAJOR); 985 goto fail1; 986 } 987 rc = scsi_register_driver(&ch_template.gendrv); 988 if (rc < 0) 989 goto fail2; 990 return 0; 991 992 fail2: 993 unregister_chrdev(SCSI_CHANGER_MAJOR, "ch"); 994 fail1: 995 class_destroy(ch_sysfs_class); 996 return rc; 997} 998 999static void __exit exit_ch_module(void) 1000{ 1001 scsi_unregister_driver(&ch_template.gendrv); 1002 unregister_chrdev(SCSI_CHANGER_MAJOR, "ch"); 1003 class_destroy(ch_sysfs_class); 1004} 1005 1006module_init(init_ch_module); 1007module_exit(exit_ch_module); 1008 1009/* 1010 * Local variables: 1011 * c-basic-offset: 8 1012 * End: 1013 */ 1014