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 DEFINE_SPINLOCK(ch_devlist_lock); 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 __user *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 void __user *argp = (void __user *)arg; 638 639 switch (cmd) { 640 case CHIOGPARAMS: 641 { 642 struct changer_params params; 643 644 params.cp_curpicker = 0; 645 params.cp_npickers = ch->counts[CHET_MT]; 646 params.cp_nslots = ch->counts[CHET_ST]; 647 params.cp_nportals = ch->counts[CHET_IE]; 648 params.cp_ndrives = ch->counts[CHET_DT]; 649 650 if (copy_to_user(argp, ¶ms, sizeof(params))) 651 return -EFAULT; 652 return 0; 653 } 654 case CHIOGVPARAMS: 655 { 656 struct changer_vendor_params vparams; 657 658 memset(&vparams,0,sizeof(vparams)); 659 if (ch->counts[CHET_V1]) { 660 vparams.cvp_n1 = ch->counts[CHET_V1]; 661 strncpy(vparams.cvp_label1,vendor_labels[0],16); 662 } 663 if (ch->counts[CHET_V2]) { 664 vparams.cvp_n2 = ch->counts[CHET_V2]; 665 strncpy(vparams.cvp_label2,vendor_labels[1],16); 666 } 667 if (ch->counts[CHET_V3]) { 668 vparams.cvp_n3 = ch->counts[CHET_V3]; 669 strncpy(vparams.cvp_label3,vendor_labels[2],16); 670 } 671 if (ch->counts[CHET_V4]) { 672 vparams.cvp_n4 = ch->counts[CHET_V4]; 673 strncpy(vparams.cvp_label4,vendor_labels[3],16); 674 } 675 if (copy_to_user(argp, &vparams, sizeof(vparams))) 676 return -EFAULT; 677 return 0; 678 } 679 680 case CHIOPOSITION: 681 { 682 struct changer_position pos; 683 684 if (copy_from_user(&pos, argp, sizeof (pos))) 685 return -EFAULT; 686 687 if (0 != ch_checkrange(ch, pos.cp_type, pos.cp_unit)) { 688 dprintk("CHIOPOSITION: invalid parameter\n"); 689 return -EBADSLT; 690 } 691 down(&ch->lock); 692 retval = ch_position(ch,0, 693 ch->firsts[pos.cp_type] + pos.cp_unit, 694 pos.cp_flags & CP_INVERT); 695 up(&ch->lock); 696 return retval; 697 } 698 699 case CHIOMOVE: 700 { 701 struct changer_move mv; 702 703 if (copy_from_user(&mv, argp, sizeof (mv))) 704 return -EFAULT; 705 706 if (0 != ch_checkrange(ch, mv.cm_fromtype, mv.cm_fromunit) || 707 0 != ch_checkrange(ch, mv.cm_totype, mv.cm_tounit )) { 708 dprintk("CHIOMOVE: invalid parameter\n"); 709 return -EBADSLT; 710 } 711 712 down(&ch->lock); 713 retval = ch_move(ch,0, 714 ch->firsts[mv.cm_fromtype] + mv.cm_fromunit, 715 ch->firsts[mv.cm_totype] + mv.cm_tounit, 716 mv.cm_flags & CM_INVERT); 717 up(&ch->lock); 718 return retval; 719 } 720 721 case CHIOEXCHANGE: 722 { 723 struct changer_exchange mv; 724 725 if (copy_from_user(&mv, argp, sizeof (mv))) 726 return -EFAULT; 727 728 if (0 != ch_checkrange(ch, mv.ce_srctype, mv.ce_srcunit ) || 729 0 != ch_checkrange(ch, mv.ce_fdsttype, mv.ce_fdstunit) || 730 0 != ch_checkrange(ch, mv.ce_sdsttype, mv.ce_sdstunit)) { 731 dprintk("CHIOEXCHANGE: invalid parameter\n"); 732 return -EBADSLT; 733 } 734 735 down(&ch->lock); 736 retval = ch_exchange 737 (ch,0, 738 ch->firsts[mv.ce_srctype] + mv.ce_srcunit, 739 ch->firsts[mv.ce_fdsttype] + mv.ce_fdstunit, 740 ch->firsts[mv.ce_sdsttype] + mv.ce_sdstunit, 741 mv.ce_flags & CE_INVERT1, mv.ce_flags & CE_INVERT2); 742 up(&ch->lock); 743 return retval; 744 } 745 746 case CHIOGSTATUS: 747 { 748 struct changer_element_status ces; 749 750 if (copy_from_user(&ces, argp, sizeof (ces))) 751 return -EFAULT; 752 if (ces.ces_type < 0 || ces.ces_type >= CH_TYPES) 753 return -EINVAL; 754 755 return ch_gstatus(ch, ces.ces_type, ces.ces_data); 756 } 757 758 case CHIOGELEM: 759 { 760 struct changer_get_element cge; 761 u_char cmd[12]; 762 u_char *buffer; 763 unsigned int elem; 764 int result,i; 765 766 if (copy_from_user(&cge, argp, sizeof (cge))) 767 return -EFAULT; 768 769 if (0 != ch_checkrange(ch, cge.cge_type, cge.cge_unit)) 770 return -EINVAL; 771 elem = ch->firsts[cge.cge_type] + cge.cge_unit; 772 773 buffer = kmalloc(512, GFP_KERNEL | GFP_DMA); 774 if (!buffer) 775 return -ENOMEM; 776 down(&ch->lock); 777 778 voltag_retry: 779 memset(cmd,0,sizeof(cmd)); 780 cmd[0] = READ_ELEMENT_STATUS; 781 cmd[1] = (ch->device->lun << 5) | 782 (ch->voltags ? 0x10 : 0) | 783 ch_elem_to_typecode(ch,elem); 784 cmd[2] = (elem >> 8) & 0xff; 785 cmd[3] = elem & 0xff; 786 cmd[5] = 1; 787 cmd[9] = 255; 788 789 if (0 == (result = ch_do_scsi(ch, cmd, buffer, 256, DMA_FROM_DEVICE))) { 790 cge.cge_status = buffer[18]; 791 cge.cge_flags = 0; 792 if (buffer[18] & CESTATUS_EXCEPT) { 793 cge.cge_errno = EIO; 794 } 795 if (buffer[25] & 0x80) { 796 cge.cge_flags |= CGE_SRC; 797 if (buffer[25] & 0x40) 798 cge.cge_flags |= CGE_INVERT; 799 elem = (buffer[26]<<8) | buffer[27]; 800 for (i = 0; i < 4; i++) { 801 if (elem >= ch->firsts[i] && 802 elem < ch->firsts[i] + ch->counts[i]) { 803 cge.cge_srctype = i; 804 cge.cge_srcunit = elem-ch->firsts[i]; 805 } 806 } 807 } 808 if ((buffer[22] & 0x30) == 0x30) { 809 cge.cge_flags |= CGE_IDLUN; 810 cge.cge_id = buffer[23]; 811 cge.cge_lun = buffer[22] & 7; 812 } 813 if (buffer[9] & 0x80) { 814 cge.cge_flags |= CGE_PVOLTAG; 815 memcpy(cge.cge_pvoltag,buffer+28,36); 816 } 817 if (buffer[9] & 0x40) { 818 cge.cge_flags |= CGE_AVOLTAG; 819 memcpy(cge.cge_avoltag,buffer+64,36); 820 } 821 } else if (ch->voltags) { 822 ch->voltags = 0; 823 vprintk("device has no volume tag support\n"); 824 goto voltag_retry; 825 } 826 kfree(buffer); 827 up(&ch->lock); 828 829 if (copy_to_user(argp, &cge, sizeof (cge))) 830 return -EFAULT; 831 return result; 832 } 833 834 case CHIOINITELEM: 835 { 836 down(&ch->lock); 837 retval = ch_init_elem(ch); 838 up(&ch->lock); 839 return retval; 840 } 841 842 case CHIOSVOLTAG: 843 { 844 struct changer_set_voltag csv; 845 int elem; 846 847 if (copy_from_user(&csv, argp, sizeof(csv))) 848 return -EFAULT; 849 850 if (0 != ch_checkrange(ch, csv.csv_type, csv.csv_unit)) { 851 dprintk("CHIOSVOLTAG: invalid parameter\n"); 852 return -EBADSLT; 853 } 854 elem = ch->firsts[csv.csv_type] + csv.csv_unit; 855 down(&ch->lock); 856 retval = ch_set_voltag(ch, elem, 857 csv.csv_flags & CSV_AVOLTAG, 858 csv.csv_flags & CSV_CLEARTAG, 859 csv.csv_voltag); 860 up(&ch->lock); 861 return retval; 862 } 863 864 default: 865 return scsi_ioctl(ch->device, cmd, argp); 866 867 } 868 } 869 870 #ifdef CONFIG_COMPAT 871 872 struct changer_element_status32 { 873 int ces_type; 874 compat_uptr_t ces_data; 875 }; 876 #define CHIOGSTATUS32 _IOW('c', 8,struct changer_element_status32) 877 878 static long ch_ioctl_compat(struct file * file, 879 unsigned int cmd, unsigned long arg) 880 { 881 scsi_changer *ch = file->private_data; 882 883 switch (cmd) { 884 case CHIOGPARAMS: 885 case CHIOGVPARAMS: 886 case CHIOPOSITION: 887 case CHIOMOVE: 888 case CHIOEXCHANGE: 889 case CHIOGELEM: 890 case CHIOINITELEM: 891 case CHIOSVOLTAG: 892 /* compatible */ 893 return ch_ioctl(NULL /* inode, unused */, 894 file, cmd, arg); 895 case CHIOGSTATUS32: 896 { 897 struct changer_element_status32 ces32; 898 unsigned char __user *data; 899 900 if (copy_from_user(&ces32, (void __user *)arg, sizeof (ces32))) 901 return -EFAULT; 902 if (ces32.ces_type < 0 || ces32.ces_type >= CH_TYPES) 903 return -EINVAL; 904 905 data = compat_ptr(ces32.ces_data); 906 return ch_gstatus(ch, ces32.ces_type, data); 907 } 908 default: 909 // return scsi_ioctl_compat(ch->device, cmd, (void*)arg); 910 return -ENOIOCTLCMD; 911 912 } 913 } 914 #endif 915 916 /* ------------------------------------------------------------------------ */ 917 918 static int ch_probe(struct device *dev) 919 { 920 struct scsi_device *sd = to_scsi_device(dev); 921 scsi_changer *ch; 922 923 if (sd->type != TYPE_MEDIUM_CHANGER) 924 return -ENODEV; 925 926 ch = kmalloc(sizeof(*ch), GFP_KERNEL); 927 if (NULL == ch) 928 return -ENOMEM; 929 930 memset(ch,0,sizeof(*ch)); 931 ch->minor = ch_devcount; 932 sprintf(ch->name,"ch%d",ch->minor); 933 init_MUTEX(&ch->lock); 934 ch->device = sd; 935 ch_readconfig(ch); 936 if (init) 937 ch_init_elem(ch); 938 939 class_device_create(ch_sysfs_class, NULL, 940 MKDEV(SCSI_CHANGER_MAJOR,ch->minor), 941 dev, "s%s", ch->name); 942 943 sdev_printk(KERN_INFO, sd, "Attached scsi changer %s\n", ch->name); 944 945 spin_lock(&ch_devlist_lock); 946 list_add_tail(&ch->list,&ch_devlist); 947 ch_devcount++; 948 spin_unlock(&ch_devlist_lock); 949 return 0; 950 } 951 952 static int ch_remove(struct device *dev) 953 { 954 struct scsi_device *sd = to_scsi_device(dev); 955 scsi_changer *tmp, *ch; 956 957 spin_lock(&ch_devlist_lock); 958 ch = NULL; 959 list_for_each_entry(tmp,&ch_devlist,list) { 960 if (tmp->device == sd) 961 ch = tmp; 962 } 963 BUG_ON(NULL == ch); 964 list_del(&ch->list); 965 spin_unlock(&ch_devlist_lock); 966 967 class_device_destroy(ch_sysfs_class, 968 MKDEV(SCSI_CHANGER_MAJOR,ch->minor)); 969 kfree(ch->dt); 970 kfree(ch); 971 ch_devcount--; 972 return 0; 973 } 974 975 static int __init init_ch_module(void) 976 { 977 int rc; 978 979 printk(KERN_INFO "SCSI Media Changer driver v" VERSION " \n"); 980 ch_sysfs_class = class_create(THIS_MODULE, "scsi_changer"); 981 if (IS_ERR(ch_sysfs_class)) { 982 rc = PTR_ERR(ch_sysfs_class); 983 return rc; 984 } 985 rc = register_chrdev(SCSI_CHANGER_MAJOR,"ch",&changer_fops); 986 if (rc < 0) { 987 printk("Unable to get major %d for SCSI-Changer\n", 988 SCSI_CHANGER_MAJOR); 989 goto fail1; 990 } 991 rc = scsi_register_driver(&ch_template.gendrv); 992 if (rc < 0) 993 goto fail2; 994 return 0; 995 996 fail2: 997 unregister_chrdev(SCSI_CHANGER_MAJOR, "ch"); 998 fail1: 999 class_destroy(ch_sysfs_class); 1000 return rc; 1001 } 1002 1003 static void __exit exit_ch_module(void) 1004 { 1005 scsi_unregister_driver(&ch_template.gendrv); 1006 unregister_chrdev(SCSI_CHANGER_MAJOR, "ch"); 1007 class_destroy(ch_sysfs_class); 1008 } 1009 1010 module_init(init_ch_module); 1011 module_exit(exit_ch_module); 1012 1013 /* 1014 * Local variables: 1015 * c-basic-offset: 8 1016 * End: 1017 */ 1018