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