tape_3590.c revision 1d802e24774c94ec7bdb12b6515226f3341533c1
1/* 2 * drivers/s390/char/tape_3590.c 3 * tape device discipline for 3590 tapes. 4 * 5 * Copyright IBM Corp. 2001, 2009 6 * Author(s): Stefan Bader <shbader@de.ibm.com> 7 * Michael Holzheu <holzheu@de.ibm.com> 8 * Martin Schwidefsky <schwidefsky@de.ibm.com> 9 */ 10 11#define KMSG_COMPONENT "tape_3590" 12#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt 13 14#include <linux/module.h> 15#include <linux/init.h> 16#include <linux/bio.h> 17#include <asm/ebcdic.h> 18 19#define TAPE_DBF_AREA tape_3590_dbf 20#define BUFSIZE 512 /* size of buffers for dynamic generated messages */ 21 22#include "tape.h" 23#include "tape_std.h" 24#include "tape_3590.h" 25 26/* 27 * Pointer to debug area. 28 */ 29debug_info_t *TAPE_DBF_AREA = NULL; 30EXPORT_SYMBOL(TAPE_DBF_AREA); 31 32/******************************************************************* 33 * Error Recovery fuctions: 34 * - Read Opposite: implemented 35 * - Read Device (buffered) log: BRA 36 * - Read Library log: BRA 37 * - Swap Devices: BRA 38 * - Long Busy: implemented 39 * - Special Intercept: BRA 40 * - Read Alternate: implemented 41 *******************************************************************/ 42 43static const char *tape_3590_msg[TAPE_3590_MAX_MSG] = { 44 [0x00] = "", 45 [0x10] = "Lost Sense", 46 [0x11] = "Assigned Elsewhere", 47 [0x12] = "Allegiance Reset", 48 [0x13] = "Shared Access Violation", 49 [0x20] = "Command Reject", 50 [0x21] = "Configuration Error", 51 [0x22] = "Protection Exception", 52 [0x23] = "Write Protect", 53 [0x24] = "Write Length", 54 [0x25] = "Read-Only Format", 55 [0x31] = "Beginning of Partition", 56 [0x33] = "End of Partition", 57 [0x34] = "End of Data", 58 [0x35] = "Block not found", 59 [0x40] = "Device Intervention", 60 [0x41] = "Loader Intervention", 61 [0x42] = "Library Intervention", 62 [0x50] = "Write Error", 63 [0x51] = "Erase Error", 64 [0x52] = "Formatting Error", 65 [0x53] = "Read Error", 66 [0x54] = "Unsupported Format", 67 [0x55] = "No Formatting", 68 [0x56] = "Positioning lost", 69 [0x57] = "Read Length", 70 [0x60] = "Unsupported Medium", 71 [0x61] = "Medium Length Error", 72 [0x62] = "Medium removed", 73 [0x64] = "Load Check", 74 [0x65] = "Unload Check", 75 [0x70] = "Equipment Check", 76 [0x71] = "Bus out Check", 77 [0x72] = "Protocol Error", 78 [0x73] = "Interface Error", 79 [0x74] = "Overrun", 80 [0x75] = "Halt Signal", 81 [0x90] = "Device fenced", 82 [0x91] = "Device Path fenced", 83 [0xa0] = "Volume misplaced", 84 [0xa1] = "Volume inaccessible", 85 [0xa2] = "Volume in input", 86 [0xa3] = "Volume ejected", 87 [0xa4] = "All categories reserved", 88 [0xa5] = "Duplicate Volume", 89 [0xa6] = "Library Manager Offline", 90 [0xa7] = "Library Output Station full", 91 [0xa8] = "Vision System non-operational", 92 [0xa9] = "Library Manager Equipment Check", 93 [0xaa] = "Library Equipment Check", 94 [0xab] = "All Library Cells full", 95 [0xac] = "No Cleaner Volumes in Library", 96 [0xad] = "I/O Station door open", 97 [0xae] = "Subsystem environmental alert", 98}; 99 100static int crypt_supported(struct tape_device *device) 101{ 102 return TAPE390_CRYPT_SUPPORTED(TAPE_3590_CRYPT_INFO(device)); 103} 104 105static int crypt_enabled(struct tape_device *device) 106{ 107 return TAPE390_CRYPT_ON(TAPE_3590_CRYPT_INFO(device)); 108} 109 110static void ext_to_int_kekl(struct tape390_kekl *in, 111 struct tape3592_kekl *out) 112{ 113 int i; 114 115 memset(out, 0, sizeof(*out)); 116 if (in->type == TAPE390_KEKL_TYPE_HASH) 117 out->flags |= 0x40; 118 if (in->type_on_tape == TAPE390_KEKL_TYPE_HASH) 119 out->flags |= 0x80; 120 strncpy(out->label, in->label, 64); 121 for (i = strlen(in->label); i < sizeof(out->label); i++) 122 out->label[i] = ' '; 123 ASCEBC(out->label, sizeof(out->label)); 124} 125 126static void int_to_ext_kekl(struct tape3592_kekl *in, 127 struct tape390_kekl *out) 128{ 129 memset(out, 0, sizeof(*out)); 130 if(in->flags & 0x40) 131 out->type = TAPE390_KEKL_TYPE_HASH; 132 else 133 out->type = TAPE390_KEKL_TYPE_LABEL; 134 if(in->flags & 0x80) 135 out->type_on_tape = TAPE390_KEKL_TYPE_HASH; 136 else 137 out->type_on_tape = TAPE390_KEKL_TYPE_LABEL; 138 memcpy(out->label, in->label, sizeof(in->label)); 139 EBCASC(out->label, sizeof(in->label)); 140 strim(out->label); 141} 142 143static void int_to_ext_kekl_pair(struct tape3592_kekl_pair *in, 144 struct tape390_kekl_pair *out) 145{ 146 if (in->count == 0) { 147 out->kekl[0].type = TAPE390_KEKL_TYPE_NONE; 148 out->kekl[0].type_on_tape = TAPE390_KEKL_TYPE_NONE; 149 out->kekl[1].type = TAPE390_KEKL_TYPE_NONE; 150 out->kekl[1].type_on_tape = TAPE390_KEKL_TYPE_NONE; 151 } else if (in->count == 1) { 152 int_to_ext_kekl(&in->kekl[0], &out->kekl[0]); 153 out->kekl[1].type = TAPE390_KEKL_TYPE_NONE; 154 out->kekl[1].type_on_tape = TAPE390_KEKL_TYPE_NONE; 155 } else if (in->count == 2) { 156 int_to_ext_kekl(&in->kekl[0], &out->kekl[0]); 157 int_to_ext_kekl(&in->kekl[1], &out->kekl[1]); 158 } else { 159 printk("Invalid KEKL number: %d\n", in->count); 160 BUG(); 161 } 162} 163 164static int check_ext_kekl(struct tape390_kekl *kekl) 165{ 166 if (kekl->type == TAPE390_KEKL_TYPE_NONE) 167 goto invalid; 168 if (kekl->type > TAPE390_KEKL_TYPE_HASH) 169 goto invalid; 170 if (kekl->type_on_tape == TAPE390_KEKL_TYPE_NONE) 171 goto invalid; 172 if (kekl->type_on_tape > TAPE390_KEKL_TYPE_HASH) 173 goto invalid; 174 if ((kekl->type == TAPE390_KEKL_TYPE_HASH) && 175 (kekl->type_on_tape == TAPE390_KEKL_TYPE_LABEL)) 176 goto invalid; 177 178 return 0; 179invalid: 180 return -EINVAL; 181} 182 183static int check_ext_kekl_pair(struct tape390_kekl_pair *kekls) 184{ 185 if (check_ext_kekl(&kekls->kekl[0])) 186 goto invalid; 187 if (check_ext_kekl(&kekls->kekl[1])) 188 goto invalid; 189 190 return 0; 191invalid: 192 return -EINVAL; 193} 194 195/* 196 * Query KEKLs 197 */ 198static int tape_3592_kekl_query(struct tape_device *device, 199 struct tape390_kekl_pair *ext_kekls) 200{ 201 struct tape_request *request; 202 struct tape3592_kekl_query_order *order; 203 struct tape3592_kekl_query_data *int_kekls; 204 int rc; 205 206 DBF_EVENT(6, "tape3592_kekl_query\n"); 207 int_kekls = kmalloc(sizeof(*int_kekls), GFP_KERNEL|GFP_DMA); 208 if (!int_kekls) 209 return -ENOMEM; 210 request = tape_alloc_request(2, sizeof(*order)); 211 if (IS_ERR(request)) { 212 rc = PTR_ERR(request); 213 goto fail_malloc; 214 } 215 order = request->cpdata; 216 memset(order,0,sizeof(*order)); 217 order->code = 0xe2; 218 order->max_count = 2; 219 request->op = TO_KEKL_QUERY; 220 tape_ccw_cc(request->cpaddr, PERF_SUBSYS_FUNC, sizeof(*order), order); 221 tape_ccw_end(request->cpaddr + 1, READ_SS_DATA, sizeof(*int_kekls), 222 int_kekls); 223 rc = tape_do_io(device, request); 224 if (rc) 225 goto fail_request; 226 int_to_ext_kekl_pair(&int_kekls->kekls, ext_kekls); 227 228 rc = 0; 229fail_request: 230 tape_free_request(request); 231fail_malloc: 232 kfree(int_kekls); 233 return rc; 234} 235 236/* 237 * IOCTL: Query KEKLs 238 */ 239static int tape_3592_ioctl_kekl_query(struct tape_device *device, 240 unsigned long arg) 241{ 242 int rc; 243 struct tape390_kekl_pair *ext_kekls; 244 245 DBF_EVENT(6, "tape_3592_ioctl_kekl_query\n"); 246 if (!crypt_supported(device)) 247 return -ENOSYS; 248 if (!crypt_enabled(device)) 249 return -EUNATCH; 250 ext_kekls = kmalloc(sizeof(*ext_kekls), GFP_KERNEL); 251 if (!ext_kekls) 252 return -ENOMEM; 253 rc = tape_3592_kekl_query(device, ext_kekls); 254 if (rc != 0) 255 goto fail; 256 if (copy_to_user((char __user *) arg, ext_kekls, sizeof(*ext_kekls))) { 257 rc = -EFAULT; 258 goto fail; 259 } 260 rc = 0; 261fail: 262 kfree(ext_kekls); 263 return rc; 264} 265 266static int tape_3590_mttell(struct tape_device *device, int mt_count); 267 268/* 269 * Set KEKLs 270 */ 271static int tape_3592_kekl_set(struct tape_device *device, 272 struct tape390_kekl_pair *ext_kekls) 273{ 274 struct tape_request *request; 275 struct tape3592_kekl_set_order *order; 276 277 DBF_EVENT(6, "tape3592_kekl_set\n"); 278 if (check_ext_kekl_pair(ext_kekls)) { 279 DBF_EVENT(6, "invalid kekls\n"); 280 return -EINVAL; 281 } 282 if (tape_3590_mttell(device, 0) != 0) 283 return -EBADSLT; 284 request = tape_alloc_request(1, sizeof(*order)); 285 if (IS_ERR(request)) 286 return PTR_ERR(request); 287 order = request->cpdata; 288 memset(order, 0, sizeof(*order)); 289 order->code = 0xe3; 290 order->kekls.count = 2; 291 ext_to_int_kekl(&ext_kekls->kekl[0], &order->kekls.kekl[0]); 292 ext_to_int_kekl(&ext_kekls->kekl[1], &order->kekls.kekl[1]); 293 request->op = TO_KEKL_SET; 294 tape_ccw_end(request->cpaddr, PERF_SUBSYS_FUNC, sizeof(*order), order); 295 296 return tape_do_io_free(device, request); 297} 298 299/* 300 * IOCTL: Set KEKLs 301 */ 302static int tape_3592_ioctl_kekl_set(struct tape_device *device, 303 unsigned long arg) 304{ 305 int rc; 306 struct tape390_kekl_pair *ext_kekls; 307 308 DBF_EVENT(6, "tape_3592_ioctl_kekl_set\n"); 309 if (!crypt_supported(device)) 310 return -ENOSYS; 311 if (!crypt_enabled(device)) 312 return -EUNATCH; 313 ext_kekls = kmalloc(sizeof(*ext_kekls), GFP_KERNEL); 314 if (!ext_kekls) 315 return -ENOMEM; 316 if (copy_from_user(ext_kekls, (char __user *)arg, sizeof(*ext_kekls))) { 317 rc = -EFAULT; 318 goto out; 319 } 320 rc = tape_3592_kekl_set(device, ext_kekls); 321out: 322 kfree(ext_kekls); 323 return rc; 324} 325 326/* 327 * Enable encryption 328 */ 329static int tape_3592_enable_crypt(struct tape_device *device) 330{ 331 struct tape_request *request; 332 char *data; 333 334 DBF_EVENT(6, "tape_3592_enable_crypt\n"); 335 if (!crypt_supported(device)) 336 return -ENOSYS; 337 request = tape_alloc_request(2, 72); 338 if (IS_ERR(request)) 339 return PTR_ERR(request); 340 data = request->cpdata; 341 memset(data,0,72); 342 343 data[0] = 0x05; 344 data[36 + 0] = 0x03; 345 data[36 + 1] = 0x03; 346 data[36 + 4] = 0x40; 347 data[36 + 6] = 0x01; 348 data[36 + 14] = 0x2f; 349 data[36 + 18] = 0xc3; 350 data[36 + 35] = 0x72; 351 request->op = TO_CRYPT_ON; 352 tape_ccw_cc(request->cpaddr, MODE_SET_CB, 36, data); 353 tape_ccw_end(request->cpaddr + 1, MODE_SET_CB, 36, data + 36); 354 return tape_do_io_free(device, request); 355} 356 357/* 358 * Disable encryption 359 */ 360static int tape_3592_disable_crypt(struct tape_device *device) 361{ 362 struct tape_request *request; 363 char *data; 364 365 DBF_EVENT(6, "tape_3592_disable_crypt\n"); 366 if (!crypt_supported(device)) 367 return -ENOSYS; 368 request = tape_alloc_request(2, 72); 369 if (IS_ERR(request)) 370 return PTR_ERR(request); 371 data = request->cpdata; 372 memset(data,0,72); 373 374 data[0] = 0x05; 375 data[36 + 0] = 0x03; 376 data[36 + 1] = 0x03; 377 data[36 + 35] = 0x32; 378 379 request->op = TO_CRYPT_OFF; 380 tape_ccw_cc(request->cpaddr, MODE_SET_CB, 36, data); 381 tape_ccw_end(request->cpaddr + 1, MODE_SET_CB, 36, data + 36); 382 383 return tape_do_io_free(device, request); 384} 385 386/* 387 * IOCTL: Set encryption status 388 */ 389static int tape_3592_ioctl_crypt_set(struct tape_device *device, 390 unsigned long arg) 391{ 392 struct tape390_crypt_info info; 393 394 DBF_EVENT(6, "tape_3592_ioctl_crypt_set\n"); 395 if (!crypt_supported(device)) 396 return -ENOSYS; 397 if (copy_from_user(&info, (char __user *)arg, sizeof(info))) 398 return -EFAULT; 399 if (info.status & ~TAPE390_CRYPT_ON_MASK) 400 return -EINVAL; 401 if (info.status & TAPE390_CRYPT_ON_MASK) 402 return tape_3592_enable_crypt(device); 403 else 404 return tape_3592_disable_crypt(device); 405} 406 407static int tape_3590_sense_medium(struct tape_device *device); 408 409/* 410 * IOCTL: Query enryption status 411 */ 412static int tape_3592_ioctl_crypt_query(struct tape_device *device, 413 unsigned long arg) 414{ 415 DBF_EVENT(6, "tape_3592_ioctl_crypt_query\n"); 416 if (!crypt_supported(device)) 417 return -ENOSYS; 418 tape_3590_sense_medium(device); 419 if (copy_to_user((char __user *) arg, &TAPE_3590_CRYPT_INFO(device), 420 sizeof(TAPE_3590_CRYPT_INFO(device)))) 421 return -EFAULT; 422 else 423 return 0; 424} 425 426/* 427 * 3590 IOCTL Overload 428 */ 429static int 430tape_3590_ioctl(struct tape_device *device, unsigned int cmd, unsigned long arg) 431{ 432 switch (cmd) { 433 case TAPE390_DISPLAY: { 434 struct display_struct disp; 435 436 if (copy_from_user(&disp, (char __user *) arg, sizeof(disp))) 437 return -EFAULT; 438 439 return tape_std_display(device, &disp); 440 } 441 case TAPE390_KEKL_SET: 442 return tape_3592_ioctl_kekl_set(device, arg); 443 case TAPE390_KEKL_QUERY: 444 return tape_3592_ioctl_kekl_query(device, arg); 445 case TAPE390_CRYPT_SET: 446 return tape_3592_ioctl_crypt_set(device, arg); 447 case TAPE390_CRYPT_QUERY: 448 return tape_3592_ioctl_crypt_query(device, arg); 449 default: 450 return -EINVAL; /* no additional ioctls */ 451 } 452} 453 454/* 455 * SENSE Medium: Get Sense data about medium state 456 */ 457static int 458tape_3590_sense_medium(struct tape_device *device) 459{ 460 struct tape_request *request; 461 462 request = tape_alloc_request(1, 128); 463 if (IS_ERR(request)) 464 return PTR_ERR(request); 465 request->op = TO_MSEN; 466 tape_ccw_end(request->cpaddr, MEDIUM_SENSE, 128, request->cpdata); 467 return tape_do_io_free(device, request); 468} 469 470/* 471 * MTTELL: Tell block. Return the number of block relative to current file. 472 */ 473static int 474tape_3590_mttell(struct tape_device *device, int mt_count) 475{ 476 __u64 block_id; 477 int rc; 478 479 rc = tape_std_read_block_id(device, &block_id); 480 if (rc) 481 return rc; 482 return block_id >> 32; 483} 484 485/* 486 * MTSEEK: seek to the specified block. 487 */ 488static int 489tape_3590_mtseek(struct tape_device *device, int count) 490{ 491 struct tape_request *request; 492 493 DBF_EVENT(6, "xsee id: %x\n", count); 494 request = tape_alloc_request(3, 4); 495 if (IS_ERR(request)) 496 return PTR_ERR(request); 497 request->op = TO_LBL; 498 tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); 499 *(__u32 *) request->cpdata = count; 500 tape_ccw_cc(request->cpaddr + 1, LOCATE, 4, request->cpdata); 501 tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL); 502 return tape_do_io_free(device, request); 503} 504 505/* 506 * Read Opposite Error Recovery Function: 507 * Used, when Read Forward does not work 508 */ 509static void 510tape_3590_read_opposite(struct tape_device *device, 511 struct tape_request *request) 512{ 513 struct tape_3590_disc_data *data; 514 515 /* 516 * We have allocated 4 ccws in tape_std_read, so we can now 517 * transform the request to a read backward, followed by a 518 * forward space block. 519 */ 520 request->op = TO_RBA; 521 tape_ccw_cc(request->cpaddr, MODE_SET_DB, 1, device->modeset_byte); 522 data = device->discdata; 523 tape_ccw_cc_idal(request->cpaddr + 1, data->read_back_op, 524 device->char_data.idal_buf); 525 tape_ccw_cc(request->cpaddr + 2, FORSPACEBLOCK, 0, NULL); 526 tape_ccw_end(request->cpaddr + 3, NOP, 0, NULL); 527 DBF_EVENT(6, "xrop ccwg\n"); 528} 529 530/* 531 * Read Attention Msg 532 * This should be done after an interrupt with attention bit (0x80) 533 * in device state. 534 * 535 * After a "read attention message" request there are two possible 536 * results: 537 * 538 * 1. A unit check is presented, when attention sense is present (e.g. when 539 * a medium has been unloaded). The attention sense comes then 540 * together with the unit check. The recovery action is either "retry" 541 * (in case there is an attention message pending) or "permanent error". 542 * 543 * 2. The attention msg is written to the "read subsystem data" buffer. 544 * In this case we probably should print it to the console. 545 */ 546static int 547tape_3590_read_attmsg(struct tape_device *device) 548{ 549 struct tape_request *request; 550 char *buf; 551 552 request = tape_alloc_request(3, 4096); 553 if (IS_ERR(request)) 554 return PTR_ERR(request); 555 request->op = TO_READ_ATTMSG; 556 buf = request->cpdata; 557 buf[0] = PREP_RD_SS_DATA; 558 buf[6] = RD_ATTMSG; /* read att msg */ 559 tape_ccw_cc(request->cpaddr, PERFORM_SS_FUNC, 12, buf); 560 tape_ccw_cc(request->cpaddr + 1, READ_SS_DATA, 4096 - 12, buf + 12); 561 tape_ccw_end(request->cpaddr + 2, NOP, 0, NULL); 562 return tape_do_io_free(device, request); 563} 564 565/* 566 * These functions are used to schedule follow-up actions from within an 567 * interrupt context (like unsolicited interrupts). 568 */ 569struct work_handler_data { 570 struct tape_device *device; 571 enum tape_op op; 572 struct work_struct work; 573}; 574 575static void 576tape_3590_work_handler(struct work_struct *work) 577{ 578 struct work_handler_data *p = 579 container_of(work, struct work_handler_data, work); 580 581 switch (p->op) { 582 case TO_MSEN: 583 tape_3590_sense_medium(p->device); 584 break; 585 case TO_READ_ATTMSG: 586 tape_3590_read_attmsg(p->device); 587 break; 588 case TO_CRYPT_ON: 589 tape_3592_enable_crypt(p->device); 590 break; 591 case TO_CRYPT_OFF: 592 tape_3592_disable_crypt(p->device); 593 break; 594 default: 595 DBF_EVENT(3, "T3590: work handler undefined for " 596 "operation 0x%02x\n", p->op); 597 } 598 tape_put_device(p->device); 599 kfree(p); 600} 601 602static int 603tape_3590_schedule_work(struct tape_device *device, enum tape_op op) 604{ 605 struct work_handler_data *p; 606 607 if ((p = kzalloc(sizeof(*p), GFP_ATOMIC)) == NULL) 608 return -ENOMEM; 609 610 INIT_WORK(&p->work, tape_3590_work_handler); 611 612 p->device = tape_get_device(device); 613 p->op = op; 614 615 schedule_work(&p->work); 616 return 0; 617} 618 619#ifdef CONFIG_S390_TAPE_BLOCK 620/* 621 * Tape Block READ 622 */ 623static struct tape_request * 624tape_3590_bread(struct tape_device *device, struct request *req) 625{ 626 struct tape_request *request; 627 struct ccw1 *ccw; 628 int count = 0, start_block; 629 unsigned off; 630 char *dst; 631 struct bio_vec *bv; 632 struct req_iterator iter; 633 634 DBF_EVENT(6, "xBREDid:"); 635 start_block = blk_rq_pos(req) >> TAPEBLOCK_HSEC_S2B; 636 DBF_EVENT(6, "start_block = %i\n", start_block); 637 638 rq_for_each_segment(bv, req, iter) 639 count += bv->bv_len >> (TAPEBLOCK_HSEC_S2B + 9); 640 641 request = tape_alloc_request(2 + count + 1, 4); 642 if (IS_ERR(request)) 643 return request; 644 request->op = TO_BLOCK; 645 *(__u32 *) request->cpdata = start_block; 646 ccw = request->cpaddr; 647 ccw = tape_ccw_cc(ccw, MODE_SET_DB, 1, device->modeset_byte); 648 649 /* 650 * We always setup a nop after the mode set ccw. This slot is 651 * used in tape_std_check_locate to insert a locate ccw if the 652 * current tape position doesn't match the start block to be read. 653 */ 654 ccw = tape_ccw_cc(ccw, NOP, 0, NULL); 655 656 rq_for_each_segment(bv, req, iter) { 657 dst = page_address(bv->bv_page) + bv->bv_offset; 658 for (off = 0; off < bv->bv_len; off += TAPEBLOCK_HSEC_SIZE) { 659 ccw->flags = CCW_FLAG_CC; 660 ccw->cmd_code = READ_FORWARD; 661 ccw->count = TAPEBLOCK_HSEC_SIZE; 662 set_normalized_cda(ccw, (void *) __pa(dst)); 663 ccw++; 664 dst += TAPEBLOCK_HSEC_SIZE; 665 } 666 BUG_ON(off > bv->bv_len); 667 } 668 ccw = tape_ccw_end(ccw, NOP, 0, NULL); 669 DBF_EVENT(6, "xBREDccwg\n"); 670 return request; 671} 672 673static void 674tape_3590_free_bread(struct tape_request *request) 675{ 676 struct ccw1 *ccw; 677 678 /* Last ccw is a nop and doesn't need clear_normalized_cda */ 679 for (ccw = request->cpaddr; ccw->flags & CCW_FLAG_CC; ccw++) 680 if (ccw->cmd_code == READ_FORWARD) 681 clear_normalized_cda(ccw); 682 tape_free_request(request); 683} 684 685/* 686 * check_locate is called just before the tape request is passed to 687 * the common io layer for execution. It has to check the current 688 * tape position and insert a locate ccw if it doesn't match the 689 * start block for the request. 690 */ 691static void 692tape_3590_check_locate(struct tape_device *device, struct tape_request *request) 693{ 694 __u32 *start_block; 695 696 start_block = (__u32 *) request->cpdata; 697 if (*start_block != device->blk_data.block_position) { 698 /* Add the start offset of the file to get the real block. */ 699 *start_block += device->bof; 700 tape_ccw_cc(request->cpaddr + 1, LOCATE, 4, request->cpdata); 701 } 702} 703#endif 704 705static void tape_3590_med_state_set(struct tape_device *device, 706 struct tape_3590_med_sense *sense) 707{ 708 struct tape390_crypt_info *c_info; 709 710 c_info = &TAPE_3590_CRYPT_INFO(device); 711 712 DBF_EVENT(6, "medium state: %x:%x\n", sense->macst, sense->masst); 713 switch (sense->macst) { 714 case 0x04: 715 case 0x05: 716 case 0x06: 717 tape_med_state_set(device, MS_UNLOADED); 718 TAPE_3590_CRYPT_INFO(device).medium_status = 0; 719 return; 720 case 0x08: 721 case 0x09: 722 tape_med_state_set(device, MS_LOADED); 723 break; 724 default: 725 tape_med_state_set(device, MS_UNKNOWN); 726 return; 727 } 728 c_info->medium_status |= TAPE390_MEDIUM_LOADED_MASK; 729 if (sense->flags & MSENSE_CRYPT_MASK) { 730 DBF_EVENT(6, "Medium is encrypted (%04x)\n", sense->flags); 731 c_info->medium_status |= TAPE390_MEDIUM_ENCRYPTED_MASK; 732 } else { 733 DBF_EVENT(6, "Medium is not encrypted %04x\n", sense->flags); 734 c_info->medium_status &= ~TAPE390_MEDIUM_ENCRYPTED_MASK; 735 } 736} 737 738/* 739 * The done handler is called at device/channel end and wakes up the sleeping 740 * process 741 */ 742static int 743tape_3590_done(struct tape_device *device, struct tape_request *request) 744{ 745 struct tape_3590_disc_data *disc_data; 746 747 DBF_EVENT(6, "%s done\n", tape_op_verbose[request->op]); 748 disc_data = device->discdata; 749 750 switch (request->op) { 751 case TO_BSB: 752 case TO_BSF: 753 case TO_DSE: 754 case TO_FSB: 755 case TO_FSF: 756 case TO_LBL: 757 case TO_RFO: 758 case TO_RBA: 759 case TO_REW: 760 case TO_WRI: 761 case TO_WTM: 762 case TO_BLOCK: 763 case TO_LOAD: 764 tape_med_state_set(device, MS_LOADED); 765 break; 766 case TO_RUN: 767 tape_med_state_set(device, MS_UNLOADED); 768 tape_3590_schedule_work(device, TO_CRYPT_OFF); 769 break; 770 case TO_MSEN: 771 tape_3590_med_state_set(device, request->cpdata); 772 break; 773 case TO_CRYPT_ON: 774 TAPE_3590_CRYPT_INFO(device).status 775 |= TAPE390_CRYPT_ON_MASK; 776 *(device->modeset_byte) |= 0x03; 777 break; 778 case TO_CRYPT_OFF: 779 TAPE_3590_CRYPT_INFO(device).status 780 &= ~TAPE390_CRYPT_ON_MASK; 781 *(device->modeset_byte) &= ~0x03; 782 break; 783 case TO_RBI: /* RBI seems to succeed even without medium loaded. */ 784 case TO_NOP: /* Same to NOP. */ 785 case TO_READ_CONFIG: 786 case TO_READ_ATTMSG: 787 case TO_DIS: 788 case TO_ASSIGN: 789 case TO_UNASSIGN: 790 case TO_SIZE: 791 case TO_KEKL_SET: 792 case TO_KEKL_QUERY: 793 case TO_RDC: 794 break; 795 } 796 return TAPE_IO_SUCCESS; 797} 798 799/* 800 * This fuction is called, when error recovery was successfull 801 */ 802static inline int 803tape_3590_erp_succeded(struct tape_device *device, struct tape_request *request) 804{ 805 DBF_EVENT(3, "Error Recovery successful for %s\n", 806 tape_op_verbose[request->op]); 807 return tape_3590_done(device, request); 808} 809 810/* 811 * This fuction is called, when error recovery was not successfull 812 */ 813static inline int 814tape_3590_erp_failed(struct tape_device *device, struct tape_request *request, 815 struct irb *irb, int rc) 816{ 817 DBF_EVENT(3, "Error Recovery failed for %s\n", 818 tape_op_verbose[request->op]); 819 tape_dump_sense_dbf(device, request, irb); 820 return rc; 821} 822 823/* 824 * Error Recovery do retry 825 */ 826static inline int 827tape_3590_erp_retry(struct tape_device *device, struct tape_request *request, 828 struct irb *irb) 829{ 830 DBF_EVENT(2, "Retry: %s\n", tape_op_verbose[request->op]); 831 tape_dump_sense_dbf(device, request, irb); 832 return TAPE_IO_RETRY; 833} 834 835/* 836 * Handle unsolicited interrupts 837 */ 838static int 839tape_3590_unsolicited_irq(struct tape_device *device, struct irb *irb) 840{ 841 if (irb->scsw.cmd.dstat == DEV_STAT_CHN_END) 842 /* Probably result of halt ssch */ 843 return TAPE_IO_PENDING; 844 else if (irb->scsw.cmd.dstat == 0x85) 845 /* Device Ready */ 846 DBF_EVENT(3, "unsol.irq! tape ready: %08x\n", device->cdev_id); 847 else if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) { 848 tape_3590_schedule_work(device, TO_READ_ATTMSG); 849 } else { 850 DBF_EVENT(3, "unsol.irq! dev end: %08x\n", device->cdev_id); 851 tape_dump_sense_dbf(device, NULL, irb); 852 } 853 /* check medium state */ 854 tape_3590_schedule_work(device, TO_MSEN); 855 return TAPE_IO_SUCCESS; 856} 857 858/* 859 * Basic Recovery routine 860 */ 861static int 862tape_3590_erp_basic(struct tape_device *device, struct tape_request *request, 863 struct irb *irb, int rc) 864{ 865 struct tape_3590_sense *sense; 866 867 sense = (struct tape_3590_sense *) irb->ecw; 868 869 switch (sense->bra) { 870 case SENSE_BRA_PER: 871 return tape_3590_erp_failed(device, request, irb, rc); 872 case SENSE_BRA_CONT: 873 return tape_3590_erp_succeded(device, request); 874 case SENSE_BRA_RE: 875 return tape_3590_erp_retry(device, request, irb); 876 case SENSE_BRA_DRE: 877 return tape_3590_erp_failed(device, request, irb, rc); 878 default: 879 BUG(); 880 return TAPE_IO_STOP; 881 } 882} 883 884/* 885 * RDL: Read Device (buffered) log 886 */ 887static int 888tape_3590_erp_read_buf_log(struct tape_device *device, 889 struct tape_request *request, struct irb *irb) 890{ 891 /* 892 * We just do the basic error recovery at the moment (retry). 893 * Perhaps in the future, we read the log and dump it somewhere... 894 */ 895 return tape_3590_erp_basic(device, request, irb, -EIO); 896} 897 898/* 899 * SWAP: Swap Devices 900 */ 901static int 902tape_3590_erp_swap(struct tape_device *device, struct tape_request *request, 903 struct irb *irb) 904{ 905 /* 906 * This error recovery should swap the tapes 907 * if the original has a problem. The operation 908 * should proceed with the new tape... this 909 * should probably be done in user space! 910 */ 911 dev_warn (&device->cdev->dev, "The tape medium must be loaded into a " 912 "different tape unit\n"); 913 return tape_3590_erp_basic(device, request, irb, -EIO); 914} 915 916/* 917 * LBY: Long Busy 918 */ 919static int 920tape_3590_erp_long_busy(struct tape_device *device, 921 struct tape_request *request, struct irb *irb) 922{ 923 DBF_EVENT(6, "Device is busy\n"); 924 return TAPE_IO_LONG_BUSY; 925} 926 927/* 928 * SPI: Special Intercept 929 */ 930static int 931tape_3590_erp_special_interrupt(struct tape_device *device, 932 struct tape_request *request, struct irb *irb) 933{ 934 return tape_3590_erp_basic(device, request, irb, -EIO); 935} 936 937/* 938 * RDA: Read Alternate 939 */ 940static int 941tape_3590_erp_read_alternate(struct tape_device *device, 942 struct tape_request *request, struct irb *irb) 943{ 944 struct tape_3590_disc_data *data; 945 946 /* 947 * The issued Read Backward or Read Previous command is not 948 * supported by the device 949 * The recovery action should be to issue another command: 950 * Read Revious: if Read Backward is not supported 951 * Read Backward: if Read Previous is not supported 952 */ 953 data = device->discdata; 954 if (data->read_back_op == READ_PREVIOUS) { 955 DBF_EVENT(2, "(%08x): No support for READ_PREVIOUS command\n", 956 device->cdev_id); 957 data->read_back_op = READ_BACKWARD; 958 } else { 959 DBF_EVENT(2, "(%08x): No support for READ_BACKWARD command\n", 960 device->cdev_id); 961 data->read_back_op = READ_PREVIOUS; 962 } 963 tape_3590_read_opposite(device, request); 964 return tape_3590_erp_retry(device, request, irb); 965} 966 967/* 968 * Error Recovery read opposite 969 */ 970static int 971tape_3590_erp_read_opposite(struct tape_device *device, 972 struct tape_request *request, struct irb *irb) 973{ 974 switch (request->op) { 975 case TO_RFO: 976 /* 977 * We did read forward, but the data could not be read. 978 * We will read backward and then skip forward again. 979 */ 980 tape_3590_read_opposite(device, request); 981 return tape_3590_erp_retry(device, request, irb); 982 case TO_RBA: 983 /* We tried to read forward and backward, but hat no success */ 984 return tape_3590_erp_failed(device, request, irb, -EIO); 985 break; 986 default: 987 return tape_3590_erp_failed(device, request, irb, -EIO); 988 } 989} 990 991/* 992 * Print an MIM (Media Information Message) (message code f0) 993 */ 994static void 995tape_3590_print_mim_msg_f0(struct tape_device *device, struct irb *irb) 996{ 997 struct tape_3590_sense *sense; 998 char *exception, *service; 999 1000 exception = kmalloc(BUFSIZE, GFP_ATOMIC); 1001 service = kmalloc(BUFSIZE, GFP_ATOMIC); 1002 1003 if (!exception || !service) 1004 goto out_nomem; 1005 1006 sense = (struct tape_3590_sense *) irb->ecw; 1007 /* Exception Message */ 1008 switch (sense->fmt.f70.emc) { 1009 case 0x02: 1010 snprintf(exception, BUFSIZE, "Data degraded"); 1011 break; 1012 case 0x03: 1013 snprintf(exception, BUFSIZE, "Data degraded in partion %i", 1014 sense->fmt.f70.mp); 1015 break; 1016 case 0x04: 1017 snprintf(exception, BUFSIZE, "Medium degraded"); 1018 break; 1019 case 0x05: 1020 snprintf(exception, BUFSIZE, "Medium degraded in partition %i", 1021 sense->fmt.f70.mp); 1022 break; 1023 case 0x06: 1024 snprintf(exception, BUFSIZE, "Block 0 Error"); 1025 break; 1026 case 0x07: 1027 snprintf(exception, BUFSIZE, "Medium Exception 0x%02x", 1028 sense->fmt.f70.md); 1029 break; 1030 default: 1031 snprintf(exception, BUFSIZE, "0x%02x", 1032 sense->fmt.f70.emc); 1033 break; 1034 } 1035 /* Service Message */ 1036 switch (sense->fmt.f70.smc) { 1037 case 0x02: 1038 snprintf(service, BUFSIZE, "Reference Media maintenance " 1039 "procedure %i", sense->fmt.f70.md); 1040 break; 1041 default: 1042 snprintf(service, BUFSIZE, "0x%02x", 1043 sense->fmt.f70.smc); 1044 break; 1045 } 1046 1047 dev_warn (&device->cdev->dev, "Tape media information: exception %s, " 1048 "service %s\n", exception, service); 1049 1050out_nomem: 1051 kfree(exception); 1052 kfree(service); 1053} 1054 1055/* 1056 * Print an I/O Subsystem Service Information Message (message code f1) 1057 */ 1058static void 1059tape_3590_print_io_sim_msg_f1(struct tape_device *device, struct irb *irb) 1060{ 1061 struct tape_3590_sense *sense; 1062 char *exception, *service; 1063 1064 exception = kmalloc(BUFSIZE, GFP_ATOMIC); 1065 service = kmalloc(BUFSIZE, GFP_ATOMIC); 1066 1067 if (!exception || !service) 1068 goto out_nomem; 1069 1070 sense = (struct tape_3590_sense *) irb->ecw; 1071 /* Exception Message */ 1072 switch (sense->fmt.f71.emc) { 1073 case 0x01: 1074 snprintf(exception, BUFSIZE, "Effect of failure is unknown"); 1075 break; 1076 case 0x02: 1077 snprintf(exception, BUFSIZE, "CU Exception - no performance " 1078 "impact"); 1079 break; 1080 case 0x03: 1081 snprintf(exception, BUFSIZE, "CU Exception on channel " 1082 "interface 0x%02x", sense->fmt.f71.md[0]); 1083 break; 1084 case 0x04: 1085 snprintf(exception, BUFSIZE, "CU Exception on device path " 1086 "0x%02x", sense->fmt.f71.md[0]); 1087 break; 1088 case 0x05: 1089 snprintf(exception, BUFSIZE, "CU Exception on library path " 1090 "0x%02x", sense->fmt.f71.md[0]); 1091 break; 1092 case 0x06: 1093 snprintf(exception, BUFSIZE, "CU Exception on node 0x%02x", 1094 sense->fmt.f71.md[0]); 1095 break; 1096 case 0x07: 1097 snprintf(exception, BUFSIZE, "CU Exception on partition " 1098 "0x%02x", sense->fmt.f71.md[0]); 1099 break; 1100 default: 1101 snprintf(exception, BUFSIZE, "0x%02x", 1102 sense->fmt.f71.emc); 1103 } 1104 /* Service Message */ 1105 switch (sense->fmt.f71.smc) { 1106 case 0x01: 1107 snprintf(service, BUFSIZE, "Repair impact is unknown"); 1108 break; 1109 case 0x02: 1110 snprintf(service, BUFSIZE, "Repair will not impact cu " 1111 "performance"); 1112 break; 1113 case 0x03: 1114 if (sense->fmt.f71.mdf == 0) 1115 snprintf(service, BUFSIZE, "Repair will disable node " 1116 "0x%x on CU", sense->fmt.f71.md[1]); 1117 else 1118 snprintf(service, BUFSIZE, "Repair will disable " 1119 "nodes (0x%x-0x%x) on CU", sense->fmt.f71.md[1], 1120 sense->fmt.f71.md[2]); 1121 break; 1122 case 0x04: 1123 if (sense->fmt.f71.mdf == 0) 1124 snprintf(service, BUFSIZE, "Repair will disable " 1125 "channel path 0x%x on CU", 1126 sense->fmt.f71.md[1]); 1127 else 1128 snprintf(service, BUFSIZE, "Repair will disable cannel" 1129 " paths (0x%x-0x%x) on CU", 1130 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1131 break; 1132 case 0x05: 1133 if (sense->fmt.f71.mdf == 0) 1134 snprintf(service, BUFSIZE, "Repair will disable device" 1135 " path 0x%x on CU", sense->fmt.f71.md[1]); 1136 else 1137 snprintf(service, BUFSIZE, "Repair will disable device" 1138 " paths (0x%x-0x%x) on CU", 1139 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1140 break; 1141 case 0x06: 1142 if (sense->fmt.f71.mdf == 0) 1143 snprintf(service, BUFSIZE, "Repair will disable " 1144 "library path 0x%x on CU", 1145 sense->fmt.f71.md[1]); 1146 else 1147 snprintf(service, BUFSIZE, "Repair will disable " 1148 "library paths (0x%x-0x%x) on CU", 1149 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1150 break; 1151 case 0x07: 1152 snprintf(service, BUFSIZE, "Repair will disable access to CU"); 1153 break; 1154 default: 1155 snprintf(service, BUFSIZE, "0x%02x", 1156 sense->fmt.f71.smc); 1157 } 1158 1159 dev_warn (&device->cdev->dev, "I/O subsystem information: exception" 1160 " %s, service %s\n", exception, service); 1161out_nomem: 1162 kfree(exception); 1163 kfree(service); 1164} 1165 1166/* 1167 * Print an Device Subsystem Service Information Message (message code f2) 1168 */ 1169static void 1170tape_3590_print_dev_sim_msg_f2(struct tape_device *device, struct irb *irb) 1171{ 1172 struct tape_3590_sense *sense; 1173 char *exception, *service; 1174 1175 exception = kmalloc(BUFSIZE, GFP_ATOMIC); 1176 service = kmalloc(BUFSIZE, GFP_ATOMIC); 1177 1178 if (!exception || !service) 1179 goto out_nomem; 1180 1181 sense = (struct tape_3590_sense *) irb->ecw; 1182 /* Exception Message */ 1183 switch (sense->fmt.f71.emc) { 1184 case 0x01: 1185 snprintf(exception, BUFSIZE, "Effect of failure is unknown"); 1186 break; 1187 case 0x02: 1188 snprintf(exception, BUFSIZE, "DV Exception - no performance" 1189 " impact"); 1190 break; 1191 case 0x03: 1192 snprintf(exception, BUFSIZE, "DV Exception on channel " 1193 "interface 0x%02x", sense->fmt.f71.md[0]); 1194 break; 1195 case 0x04: 1196 snprintf(exception, BUFSIZE, "DV Exception on loader 0x%02x", 1197 sense->fmt.f71.md[0]); 1198 break; 1199 case 0x05: 1200 snprintf(exception, BUFSIZE, "DV Exception on message display" 1201 " 0x%02x", sense->fmt.f71.md[0]); 1202 break; 1203 case 0x06: 1204 snprintf(exception, BUFSIZE, "DV Exception in tape path"); 1205 break; 1206 case 0x07: 1207 snprintf(exception, BUFSIZE, "DV Exception in drive"); 1208 break; 1209 default: 1210 snprintf(exception, BUFSIZE, "0x%02x", 1211 sense->fmt.f71.emc); 1212 } 1213 /* Service Message */ 1214 switch (sense->fmt.f71.smc) { 1215 case 0x01: 1216 snprintf(service, BUFSIZE, "Repair impact is unknown"); 1217 break; 1218 case 0x02: 1219 snprintf(service, BUFSIZE, "Repair will not impact device " 1220 "performance"); 1221 break; 1222 case 0x03: 1223 if (sense->fmt.f71.mdf == 0) 1224 snprintf(service, BUFSIZE, "Repair will disable " 1225 "channel path 0x%x on DV", 1226 sense->fmt.f71.md[1]); 1227 else 1228 snprintf(service, BUFSIZE, "Repair will disable " 1229 "channel path (0x%x-0x%x) on DV", 1230 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1231 break; 1232 case 0x04: 1233 if (sense->fmt.f71.mdf == 0) 1234 snprintf(service, BUFSIZE, "Repair will disable " 1235 "interface 0x%x on DV", sense->fmt.f71.md[1]); 1236 else 1237 snprintf(service, BUFSIZE, "Repair will disable " 1238 "interfaces (0x%x-0x%x) on DV", 1239 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1240 break; 1241 case 0x05: 1242 if (sense->fmt.f71.mdf == 0) 1243 snprintf(service, BUFSIZE, "Repair will disable loader" 1244 " 0x%x on DV", sense->fmt.f71.md[1]); 1245 else 1246 snprintf(service, BUFSIZE, "Repair will disable loader" 1247 " (0x%x-0x%x) on DV", 1248 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1249 break; 1250 case 0x07: 1251 snprintf(service, BUFSIZE, "Repair will disable access to DV"); 1252 break; 1253 case 0x08: 1254 if (sense->fmt.f71.mdf == 0) 1255 snprintf(service, BUFSIZE, "Repair will disable " 1256 "message display 0x%x on DV", 1257 sense->fmt.f71.md[1]); 1258 else 1259 snprintf(service, BUFSIZE, "Repair will disable " 1260 "message displays (0x%x-0x%x) on DV", 1261 sense->fmt.f71.md[1], sense->fmt.f71.md[2]); 1262 break; 1263 case 0x09: 1264 snprintf(service, BUFSIZE, "Clean DV"); 1265 break; 1266 default: 1267 snprintf(service, BUFSIZE, "0x%02x", 1268 sense->fmt.f71.smc); 1269 } 1270 1271 dev_warn (&device->cdev->dev, "Device subsystem information: exception" 1272 " %s, service %s\n", exception, service); 1273out_nomem: 1274 kfree(exception); 1275 kfree(service); 1276} 1277 1278/* 1279 * Print standard ERA Message 1280 */ 1281static void 1282tape_3590_print_era_msg(struct tape_device *device, struct irb *irb) 1283{ 1284 struct tape_3590_sense *sense; 1285 1286 sense = (struct tape_3590_sense *) irb->ecw; 1287 if (sense->mc == 0) 1288 return; 1289 if ((sense->mc > 0) && (sense->mc < TAPE_3590_MAX_MSG)) { 1290 if (tape_3590_msg[sense->mc] != NULL) 1291 dev_warn (&device->cdev->dev, "The tape unit has " 1292 "issued sense message %s\n", 1293 tape_3590_msg[sense->mc]); 1294 else 1295 dev_warn (&device->cdev->dev, "The tape unit has " 1296 "issued an unknown sense message code 0x%x\n", 1297 sense->mc); 1298 return; 1299 } 1300 if (sense->mc == 0xf0) { 1301 /* Standard Media Information Message */ 1302 dev_warn (&device->cdev->dev, "MIM SEV=%i, MC=%02x, ES=%x/%x, " 1303 "RC=%02x-%04x-%02x\n", sense->fmt.f70.sev, sense->mc, 1304 sense->fmt.f70.emc, sense->fmt.f70.smc, 1305 sense->fmt.f70.refcode, sense->fmt.f70.mid, 1306 sense->fmt.f70.fid); 1307 tape_3590_print_mim_msg_f0(device, irb); 1308 return; 1309 } 1310 if (sense->mc == 0xf1) { 1311 /* Standard I/O Subsystem Service Information Message */ 1312 dev_warn (&device->cdev->dev, "IOSIM SEV=%i, DEVTYPE=3590/%02x," 1313 " MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n", 1314 sense->fmt.f71.sev, device->cdev->id.dev_model, 1315 sense->mc, sense->fmt.f71.emc, sense->fmt.f71.smc, 1316 sense->fmt.f71.refcode1, sense->fmt.f71.refcode2, 1317 sense->fmt.f71.refcode3); 1318 tape_3590_print_io_sim_msg_f1(device, irb); 1319 return; 1320 } 1321 if (sense->mc == 0xf2) { 1322 /* Standard Device Service Information Message */ 1323 dev_warn (&device->cdev->dev, "DEVSIM SEV=%i, DEVTYPE=3590/%02x" 1324 ", MC=%02x, ES=%x/%x, REF=0x%04x-0x%04x-0x%04x\n", 1325 sense->fmt.f71.sev, device->cdev->id.dev_model, 1326 sense->mc, sense->fmt.f71.emc, sense->fmt.f71.smc, 1327 sense->fmt.f71.refcode1, sense->fmt.f71.refcode2, 1328 sense->fmt.f71.refcode3); 1329 tape_3590_print_dev_sim_msg_f2(device, irb); 1330 return; 1331 } 1332 if (sense->mc == 0xf3) { 1333 /* Standard Library Service Information Message */ 1334 return; 1335 } 1336 dev_warn (&device->cdev->dev, "The tape unit has issued an unknown " 1337 "sense message code %x\n", sense->mc); 1338} 1339 1340static int tape_3590_crypt_error(struct tape_device *device, 1341 struct tape_request *request, struct irb *irb) 1342{ 1343 u8 cu_rc, ekm_rc1; 1344 u16 ekm_rc2; 1345 u32 drv_rc; 1346 const char *bus_id; 1347 char *sense; 1348 1349 sense = ((struct tape_3590_sense *) irb->ecw)->fmt.data; 1350 bus_id = dev_name(&device->cdev->dev); 1351 cu_rc = sense[0]; 1352 drv_rc = *((u32*) &sense[5]) & 0xffffff; 1353 ekm_rc1 = sense[9]; 1354 ekm_rc2 = *((u16*) &sense[10]); 1355 if ((cu_rc == 0) && (ekm_rc2 == 0xee31)) 1356 /* key not defined on EKM */ 1357 return tape_3590_erp_basic(device, request, irb, -EKEYREJECTED); 1358 if ((cu_rc == 1) || (cu_rc == 2)) 1359 /* No connection to EKM */ 1360 return tape_3590_erp_basic(device, request, irb, -ENOTCONN); 1361 1362 dev_err (&device->cdev->dev, "The tape unit failed to obtain the " 1363 "encryption key from EKM\n"); 1364 1365 return tape_3590_erp_basic(device, request, irb, -ENOKEY); 1366} 1367 1368/* 1369 * 3590 error Recovery routine: 1370 * If possible, it tries to recover from the error. If this is not possible, 1371 * inform the user about the problem. 1372 */ 1373static int 1374tape_3590_unit_check(struct tape_device *device, struct tape_request *request, 1375 struct irb *irb) 1376{ 1377 struct tape_3590_sense *sense; 1378 int rc; 1379 1380#ifdef CONFIG_S390_TAPE_BLOCK 1381 if (request->op == TO_BLOCK) { 1382 /* 1383 * Recovery for block device requests. Set the block_position 1384 * to something invalid and retry. 1385 */ 1386 device->blk_data.block_position = -1; 1387 if (request->retries-- <= 0) 1388 return tape_3590_erp_failed(device, request, irb, -EIO); 1389 else 1390 return tape_3590_erp_retry(device, request, irb); 1391 } 1392#endif 1393 1394 sense = (struct tape_3590_sense *) irb->ecw; 1395 1396 DBF_EVENT(6, "Unit Check: RQC = %x\n", sense->rc_rqc); 1397 1398 /* 1399 * First check all RC-QRCs where we want to do something special 1400 * - "break": basic error recovery is done 1401 * - "goto out:": just print error message if available 1402 */ 1403 rc = -EIO; 1404 switch (sense->rc_rqc) { 1405 1406 case 0x1110: 1407 tape_3590_print_era_msg(device, irb); 1408 return tape_3590_erp_read_buf_log(device, request, irb); 1409 1410 case 0x2011: 1411 tape_3590_print_era_msg(device, irb); 1412 return tape_3590_erp_read_alternate(device, request, irb); 1413 1414 case 0x2230: 1415 case 0x2231: 1416 tape_3590_print_era_msg(device, irb); 1417 return tape_3590_erp_special_interrupt(device, request, irb); 1418 case 0x2240: 1419 return tape_3590_crypt_error(device, request, irb); 1420 1421 case 0x3010: 1422 DBF_EVENT(2, "(%08x): Backward at Beginning of Partition\n", 1423 device->cdev_id); 1424 return tape_3590_erp_basic(device, request, irb, -ENOSPC); 1425 case 0x3012: 1426 DBF_EVENT(2, "(%08x): Forward at End of Partition\n", 1427 device->cdev_id); 1428 return tape_3590_erp_basic(device, request, irb, -ENOSPC); 1429 case 0x3020: 1430 DBF_EVENT(2, "(%08x): End of Data Mark\n", device->cdev_id); 1431 return tape_3590_erp_basic(device, request, irb, -ENOSPC); 1432 1433 case 0x3122: 1434 DBF_EVENT(2, "(%08x): Rewind Unload initiated\n", 1435 device->cdev_id); 1436 return tape_3590_erp_basic(device, request, irb, -EIO); 1437 case 0x3123: 1438 DBF_EVENT(2, "(%08x): Rewind Unload complete\n", 1439 device->cdev_id); 1440 tape_med_state_set(device, MS_UNLOADED); 1441 tape_3590_schedule_work(device, TO_CRYPT_OFF); 1442 return tape_3590_erp_basic(device, request, irb, 0); 1443 1444 case 0x4010: 1445 /* 1446 * print additional msg since default msg 1447 * "device intervention" is not very meaningfull 1448 */ 1449 tape_med_state_set(device, MS_UNLOADED); 1450 tape_3590_schedule_work(device, TO_CRYPT_OFF); 1451 return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM); 1452 case 0x4012: /* Device Long Busy */ 1453 /* XXX: Also use long busy handling here? */ 1454 DBF_EVENT(6, "(%08x): LONG BUSY\n", device->cdev_id); 1455 tape_3590_print_era_msg(device, irb); 1456 return tape_3590_erp_basic(device, request, irb, -EBUSY); 1457 case 0x4014: 1458 DBF_EVENT(6, "(%08x): Crypto LONG BUSY\n", device->cdev_id); 1459 return tape_3590_erp_long_busy(device, request, irb); 1460 1461 case 0x5010: 1462 if (sense->rac == 0xd0) { 1463 /* Swap */ 1464 tape_3590_print_era_msg(device, irb); 1465 return tape_3590_erp_swap(device, request, irb); 1466 } 1467 if (sense->rac == 0x26) { 1468 /* Read Opposite */ 1469 tape_3590_print_era_msg(device, irb); 1470 return tape_3590_erp_read_opposite(device, request, 1471 irb); 1472 } 1473 return tape_3590_erp_basic(device, request, irb, -EIO); 1474 case 0x5020: 1475 case 0x5021: 1476 case 0x5022: 1477 case 0x5040: 1478 case 0x5041: 1479 case 0x5042: 1480 tape_3590_print_era_msg(device, irb); 1481 return tape_3590_erp_swap(device, request, irb); 1482 1483 case 0x5110: 1484 case 0x5111: 1485 return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE); 1486 1487 case 0x5120: 1488 case 0x1120: 1489 tape_med_state_set(device, MS_UNLOADED); 1490 tape_3590_schedule_work(device, TO_CRYPT_OFF); 1491 return tape_3590_erp_basic(device, request, irb, -ENOMEDIUM); 1492 1493 case 0x6020: 1494 return tape_3590_erp_basic(device, request, irb, -EMEDIUMTYPE); 1495 1496 case 0x8011: 1497 return tape_3590_erp_basic(device, request, irb, -EPERM); 1498 case 0x8013: 1499 dev_warn (&device->cdev->dev, "A different host has privileged" 1500 " access to the tape unit\n"); 1501 return tape_3590_erp_basic(device, request, irb, -EPERM); 1502 default: 1503 return tape_3590_erp_basic(device, request, irb, -EIO); 1504 } 1505} 1506 1507/* 1508 * 3590 interrupt handler: 1509 */ 1510static int 1511tape_3590_irq(struct tape_device *device, struct tape_request *request, 1512 struct irb *irb) 1513{ 1514 if (request == NULL) 1515 return tape_3590_unsolicited_irq(device, irb); 1516 1517 if ((irb->scsw.cmd.dstat & DEV_STAT_UNIT_EXCEP) && 1518 (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) && 1519 (request->op == TO_WRI)) { 1520 /* Write at end of volume */ 1521 DBF_EVENT(2, "End of volume\n"); 1522 return tape_3590_erp_failed(device, request, irb, -ENOSPC); 1523 } 1524 1525 if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) 1526 return tape_3590_unit_check(device, request, irb); 1527 1528 if (irb->scsw.cmd.dstat & DEV_STAT_DEV_END) { 1529 if (irb->scsw.cmd.dstat == DEV_STAT_UNIT_EXCEP) { 1530 if (request->op == TO_FSB || request->op == TO_BSB) 1531 request->rescnt++; 1532 else 1533 DBF_EVENT(5, "Unit Exception!\n"); 1534 } 1535 1536 return tape_3590_done(device, request); 1537 } 1538 1539 if (irb->scsw.cmd.dstat & DEV_STAT_CHN_END) { 1540 DBF_EVENT(2, "cannel end\n"); 1541 return TAPE_IO_PENDING; 1542 } 1543 1544 if (irb->scsw.cmd.dstat & DEV_STAT_ATTENTION) { 1545 DBF_EVENT(2, "Unit Attention when busy..\n"); 1546 return TAPE_IO_PENDING; 1547 } 1548 1549 DBF_EVENT(6, "xunknownirq\n"); 1550 tape_dump_sense_dbf(device, request, irb); 1551 return TAPE_IO_STOP; 1552} 1553 1554 1555static int tape_3590_read_dev_chars(struct tape_device *device, 1556 struct tape_3590_rdc_data *rdc_data) 1557{ 1558 int rc; 1559 struct tape_request *request; 1560 1561 request = tape_alloc_request(1, sizeof(*rdc_data)); 1562 if (IS_ERR(request)) 1563 return PTR_ERR(request); 1564 request->op = TO_RDC; 1565 tape_ccw_end(request->cpaddr, CCW_CMD_RDC, sizeof(*rdc_data), 1566 request->cpdata); 1567 rc = tape_do_io(device, request); 1568 if (rc == 0) 1569 memcpy(rdc_data, request->cpdata, sizeof(*rdc_data)); 1570 tape_free_request(request); 1571 return rc; 1572} 1573 1574/* 1575 * Setup device function 1576 */ 1577static int 1578tape_3590_setup_device(struct tape_device *device) 1579{ 1580 int rc; 1581 struct tape_3590_disc_data *data; 1582 struct tape_3590_rdc_data *rdc_data; 1583 1584 DBF_EVENT(6, "3590 device setup\n"); 1585 data = kzalloc(sizeof(struct tape_3590_disc_data), GFP_KERNEL | GFP_DMA); 1586 if (data == NULL) 1587 return -ENOMEM; 1588 data->read_back_op = READ_PREVIOUS; 1589 device->discdata = data; 1590 1591 rdc_data = kmalloc(sizeof(*rdc_data), GFP_KERNEL | GFP_DMA); 1592 if (!rdc_data) { 1593 rc = -ENOMEM; 1594 goto fail_kmalloc; 1595 } 1596 rc = tape_3590_read_dev_chars(device, rdc_data); 1597 if (rc) { 1598 DBF_LH(3, "Read device characteristics failed!\n"); 1599 goto fail_rdc_data; 1600 } 1601 rc = tape_std_assign(device); 1602 if (rc) 1603 goto fail_rdc_data; 1604 if (rdc_data->data[31] == 0x13) { 1605 data->crypt_info.capability |= TAPE390_CRYPT_SUPPORTED_MASK; 1606 tape_3592_disable_crypt(device); 1607 } else { 1608 DBF_EVENT(6, "Device has NO crypto support\n"); 1609 } 1610 /* Try to find out if medium is loaded */ 1611 rc = tape_3590_sense_medium(device); 1612 if (rc) { 1613 DBF_LH(3, "3590 medium sense returned %d\n", rc); 1614 goto fail_rdc_data; 1615 } 1616 return 0; 1617 1618fail_rdc_data: 1619 kfree(rdc_data); 1620fail_kmalloc: 1621 kfree(data); 1622 return rc; 1623} 1624 1625/* 1626 * Cleanup device function 1627 */ 1628static void 1629tape_3590_cleanup_device(struct tape_device *device) 1630{ 1631 flush_scheduled_work(); 1632 tape_std_unassign(device); 1633 1634 kfree(device->discdata); 1635 device->discdata = NULL; 1636} 1637 1638/* 1639 * List of 3590 magnetic tape commands. 1640 */ 1641static tape_mtop_fn tape_3590_mtop[TAPE_NR_MTOPS] = { 1642 [MTRESET] = tape_std_mtreset, 1643 [MTFSF] = tape_std_mtfsf, 1644 [MTBSF] = tape_std_mtbsf, 1645 [MTFSR] = tape_std_mtfsr, 1646 [MTBSR] = tape_std_mtbsr, 1647 [MTWEOF] = tape_std_mtweof, 1648 [MTREW] = tape_std_mtrew, 1649 [MTOFFL] = tape_std_mtoffl, 1650 [MTNOP] = tape_std_mtnop, 1651 [MTRETEN] = tape_std_mtreten, 1652 [MTBSFM] = tape_std_mtbsfm, 1653 [MTFSFM] = tape_std_mtfsfm, 1654 [MTEOM] = tape_std_mteom, 1655 [MTERASE] = tape_std_mterase, 1656 [MTRAS1] = NULL, 1657 [MTRAS2] = NULL, 1658 [MTRAS3] = NULL, 1659 [MTSETBLK] = tape_std_mtsetblk, 1660 [MTSETDENSITY] = NULL, 1661 [MTSEEK] = tape_3590_mtseek, 1662 [MTTELL] = tape_3590_mttell, 1663 [MTSETDRVBUFFER] = NULL, 1664 [MTFSS] = NULL, 1665 [MTBSS] = NULL, 1666 [MTWSM] = NULL, 1667 [MTLOCK] = NULL, 1668 [MTUNLOCK] = NULL, 1669 [MTLOAD] = tape_std_mtload, 1670 [MTUNLOAD] = tape_std_mtunload, 1671 [MTCOMPRESSION] = tape_std_mtcompression, 1672 [MTSETPART] = NULL, 1673 [MTMKPART] = NULL 1674}; 1675 1676/* 1677 * Tape discipline structure for 3590. 1678 */ 1679static struct tape_discipline tape_discipline_3590 = { 1680 .owner = THIS_MODULE, 1681 .setup_device = tape_3590_setup_device, 1682 .cleanup_device = tape_3590_cleanup_device, 1683 .process_eov = tape_std_process_eov, 1684 .irq = tape_3590_irq, 1685 .read_block = tape_std_read_block, 1686 .write_block = tape_std_write_block, 1687#ifdef CONFIG_S390_TAPE_BLOCK 1688 .bread = tape_3590_bread, 1689 .free_bread = tape_3590_free_bread, 1690 .check_locate = tape_3590_check_locate, 1691#endif 1692 .ioctl_fn = tape_3590_ioctl, 1693 .mtop_array = tape_3590_mtop 1694}; 1695 1696static struct ccw_device_id tape_3590_ids[] = { 1697 {CCW_DEVICE_DEVTYPE(0x3590, 0, 0x3590, 0), .driver_info = tape_3590}, 1698 {CCW_DEVICE_DEVTYPE(0x3592, 0, 0x3592, 0), .driver_info = tape_3592}, 1699 { /* end of list */ } 1700}; 1701 1702static int 1703tape_3590_online(struct ccw_device *cdev) 1704{ 1705 return tape_generic_online(dev_get_drvdata(&cdev->dev), 1706 &tape_discipline_3590); 1707} 1708 1709static struct ccw_driver tape_3590_driver = { 1710 .name = "tape_3590", 1711 .owner = THIS_MODULE, 1712 .ids = tape_3590_ids, 1713 .probe = tape_generic_probe, 1714 .remove = tape_generic_remove, 1715 .set_offline = tape_generic_offline, 1716 .set_online = tape_3590_online, 1717 .freeze = tape_generic_pm_suspend, 1718}; 1719 1720/* 1721 * Setup discipline structure. 1722 */ 1723static int 1724tape_3590_init(void) 1725{ 1726 int rc; 1727 1728 TAPE_DBF_AREA = debug_register("tape_3590", 2, 2, 4 * sizeof(long)); 1729 debug_register_view(TAPE_DBF_AREA, &debug_sprintf_view); 1730#ifdef DBF_LIKE_HELL 1731 debug_set_level(TAPE_DBF_AREA, 6); 1732#endif 1733 1734 DBF_EVENT(3, "3590 init\n"); 1735 /* Register driver for 3590 tapes. */ 1736 rc = ccw_driver_register(&tape_3590_driver); 1737 if (rc) 1738 DBF_EVENT(3, "3590 init failed\n"); 1739 else 1740 DBF_EVENT(3, "3590 registered\n"); 1741 return rc; 1742} 1743 1744static void 1745tape_3590_exit(void) 1746{ 1747 ccw_driver_unregister(&tape_3590_driver); 1748 1749 debug_unregister(TAPE_DBF_AREA); 1750} 1751 1752MODULE_DEVICE_TABLE(ccw, tape_3590_ids); 1753MODULE_AUTHOR("(C) 2001,2006 IBM Corporation"); 1754MODULE_DESCRIPTION("Linux on zSeries channel attached 3590 tape device driver"); 1755MODULE_LICENSE("GPL"); 1756 1757module_init(tape_3590_init); 1758module_exit(tape_3590_exit); 1759