1// SPDX-License-Identifier: GPL-2.0 2/* 3 * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> 4 * Bugreports.to..: <Linux390@de.ibm.com> 5 * Copyright IBM Corp. 1999, 2009 6 */ 7 8#define KMSG_COMPONENT "dasd-fba" 9 10#include <linux/stddef.h> 11#include <linux/kernel.h> 12#include <asm/debug.h> 13 14#include <linux/slab.h> 15#include <linux/hdreg.h> /* HDIO_GETGEO */ 16#include <linux/bio.h> 17#include <linux/module.h> 18#include <linux/init.h> 19#include <linux/io.h> 20 21#include <asm/idals.h> 22#include <asm/ebcdic.h> 23#include <asm/ccwdev.h> 24 25#include "dasd_int.h" 26#include "dasd_fba.h" 27 28#define FBA_DEFAULT_RETRIES 32 29 30#define DASD_FBA_CCW_WRITE 0x41 31#define DASD_FBA_CCW_READ 0x42 32#define DASD_FBA_CCW_LOCATE 0x43 33#define DASD_FBA_CCW_DEFINE_EXTENT 0x63 34 35MODULE_LICENSE("GPL"); 36 37static struct dasd_discipline dasd_fba_discipline; 38static void *dasd_fba_zero_page; 39 40struct dasd_fba_private { 41 struct dasd_fba_characteristics rdc_data; 42}; 43 44static struct ccw_device_id dasd_fba_ids[] = { 45 { CCW_DEVICE_DEVTYPE (0x6310, 0, 0x9336, 0), .driver_info = 0x1}, 46 { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3370, 0), .driver_info = 0x2}, 47 { /* end of list */ }, 48}; 49 50MODULE_DEVICE_TABLE(ccw, dasd_fba_ids); 51 52static int 53dasd_fba_set_online(struct ccw_device *cdev) 54{ 55 return dasd_generic_set_online(cdev, &dasd_fba_discipline); 56} 57 58static struct ccw_driver dasd_fba_driver = { 59 .driver = { 60 .name = "dasd-fba", 61 .owner = THIS_MODULE, 62 .dev_groups = dasd_dev_groups, 63 }, 64 .ids = dasd_fba_ids, 65 .probe = dasd_generic_probe, 66 .remove = dasd_generic_remove, 67 .set_offline = dasd_generic_set_offline, 68 .set_online = dasd_fba_set_online, 69 .notify = dasd_generic_notify, 70 .path_event = dasd_generic_path_event, 71 .int_class = IRQIO_DAS, 72}; 73 74static void 75define_extent(struct ccw1 * ccw, struct DE_fba_data *data, int rw, 76 int blksize, int beg, int nr) 77{ 78 ccw->cmd_code = DASD_FBA_CCW_DEFINE_EXTENT; 79 ccw->flags = 0; 80 ccw->count = 16; 81 ccw->cda = virt_to_dma32(data); 82 memset(data, 0, sizeof (struct DE_fba_data)); 83 if (rw == WRITE) 84 (data->mask).perm = 0x0; 85 else if (rw == READ) 86 (data->mask).perm = 0x1; 87 else 88 data->mask.perm = 0x2; 89 data->blk_size = blksize; 90 data->ext_loc = beg; 91 data->ext_end = nr - 1; 92} 93 94static void 95locate_record(struct ccw1 * ccw, struct LO_fba_data *data, int rw, 96 int block_nr, int block_ct) 97{ 98 ccw->cmd_code = DASD_FBA_CCW_LOCATE; 99 ccw->flags = 0; 100 ccw->count = 8; 101 ccw->cda = virt_to_dma32(data); 102 memset(data, 0, sizeof (struct LO_fba_data)); 103 if (rw == WRITE) 104 data->operation.cmd = 0x5; 105 else if (rw == READ) 106 data->operation.cmd = 0x6; 107 else 108 data->operation.cmd = 0x8; 109 data->blk_nr = block_nr; 110 data->blk_ct = block_ct; 111} 112 113static int 114dasd_fba_check_characteristics(struct dasd_device *device) 115{ 116 struct dasd_fba_private *private = device->private; 117 struct ccw_device *cdev = device->cdev; 118 struct dasd_block *block; 119 int readonly, rc; 120 121 if (!private) { 122 private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); 123 if (!private) { 124 dev_warn(&device->cdev->dev, 125 "Allocating memory for private DASD " 126 "data failed\n"); 127 return -ENOMEM; 128 } 129 device->private = private; 130 } else { 131 memset(private, 0, sizeof(*private)); 132 } 133 block = dasd_alloc_block(); 134 if (IS_ERR(block)) { 135 DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s", "could not allocate " 136 "dasd block structure"); 137 device->private = NULL; 138 kfree(private); 139 return PTR_ERR(block); 140 } 141 device->block = block; 142 block->base = device; 143 144 /* Read Device Characteristics */ 145 rc = dasd_generic_read_dev_chars(device, DASD_FBA_MAGIC, 146 &private->rdc_data, 32); 147 if (rc) { 148 DBF_EVENT_DEVID(DBF_WARNING, cdev, "Read device " 149 "characteristics returned error %d", rc); 150 device->block = NULL; 151 dasd_free_block(block); 152 device->private = NULL; 153 kfree(private); 154 return rc; 155 } 156 157 device->default_expires = DASD_EXPIRES; 158 device->default_retries = FBA_DEFAULT_RETRIES; 159 dasd_path_set_opm(device, LPM_ANYPATH); 160 161 readonly = dasd_device_is_ro(device); 162 if (readonly) 163 set_bit(DASD_FLAG_DEVICE_RO, &device->flags); 164 165 /* FBA supports discard, set the according feature bit */ 166 dasd_set_feature(cdev, DASD_FEATURE_DISCARD, 1); 167 168 dev_info(&device->cdev->dev, 169 "New FBA DASD %04X/%02X (CU %04X/%02X) with %d MB " 170 "and %d B/blk%s\n", 171 cdev->id.dev_type, 172 cdev->id.dev_model, 173 cdev->id.cu_type, 174 cdev->id.cu_model, 175 ((private->rdc_data.blk_bdsa * 176 (private->rdc_data.blk_size >> 9)) >> 11), 177 private->rdc_data.blk_size, 178 readonly ? ", read-only device" : ""); 179 return 0; 180} 181 182static int dasd_fba_do_analysis(struct dasd_block *block) 183{ 184 struct dasd_fba_private *private = block->base->private; 185 int sb, rc; 186 187 rc = dasd_check_blocksize(private->rdc_data.blk_size); 188 if (rc) { 189 DBF_DEV_EVENT(DBF_WARNING, block->base, "unknown blocksize %d", 190 private->rdc_data.blk_size); 191 return rc; 192 } 193 block->blocks = private->rdc_data.blk_bdsa; 194 block->bp_block = private->rdc_data.blk_size; 195 block->s2b_shift = 0; /* bits to shift 512 to get a block */ 196 for (sb = 512; sb < private->rdc_data.blk_size; sb = sb << 1) 197 block->s2b_shift++; 198 return 0; 199} 200 201static int dasd_fba_fill_geometry(struct dasd_block *block, 202 struct hd_geometry *geo) 203{ 204 if (dasd_check_blocksize(block->bp_block) != 0) 205 return -EINVAL; 206 geo->cylinders = (block->blocks << block->s2b_shift) >> 10; 207 geo->heads = 16; 208 geo->sectors = 128 >> block->s2b_shift; 209 return 0; 210} 211 212static dasd_erp_fn_t 213dasd_fba_erp_action(struct dasd_ccw_req * cqr) 214{ 215 return dasd_default_erp_action; 216} 217 218static dasd_erp_fn_t 219dasd_fba_erp_postaction(struct dasd_ccw_req * cqr) 220{ 221 if (cqr->function == dasd_default_erp_action) 222 return dasd_default_erp_postaction; 223 224 DBF_DEV_EVENT(DBF_WARNING, cqr->startdev, "unknown ERP action %p", 225 cqr->function); 226 return NULL; 227} 228 229static void dasd_fba_check_for_device_change(struct dasd_device *device, 230 struct dasd_ccw_req *cqr, 231 struct irb *irb) 232{ 233 char mask; 234 235 /* first of all check for state change pending interrupt */ 236 mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 237 if ((irb->scsw.cmd.dstat & mask) == mask) 238 dasd_generic_handle_state_change(device); 239}; 240 241 242/* 243 * Builds a CCW with no data payload 244 */ 245static void ccw_write_no_data(struct ccw1 *ccw) 246{ 247 ccw->cmd_code = DASD_FBA_CCW_WRITE; 248 ccw->flags |= CCW_FLAG_SLI; 249 ccw->count = 0; 250} 251 252/* 253 * Builds a CCW that writes only zeroes. 254 */ 255static void ccw_write_zero(struct ccw1 *ccw, int count) 256{ 257 ccw->cmd_code = DASD_FBA_CCW_WRITE; 258 ccw->flags |= CCW_FLAG_SLI; 259 ccw->count = count; 260 ccw->cda = virt_to_dma32(dasd_fba_zero_page); 261} 262 263/* 264 * Helper function to count the amount of necessary CCWs within a given range 265 * with 4k alignment and command chaining in mind. 266 */ 267static int count_ccws(sector_t first_rec, sector_t last_rec, 268 unsigned int blocks_per_page) 269{ 270 sector_t wz_stop = 0, d_stop = 0; 271 int cur_pos = 0; 272 int count = 0; 273 274 if (first_rec % blocks_per_page != 0) { 275 wz_stop = first_rec + blocks_per_page - 276 (first_rec % blocks_per_page) - 1; 277 if (wz_stop > last_rec) 278 wz_stop = last_rec; 279 cur_pos = wz_stop - first_rec + 1; 280 count++; 281 } 282 283 if (last_rec - (first_rec + cur_pos) + 1 >= blocks_per_page) { 284 if ((last_rec - blocks_per_page + 1) % blocks_per_page != 0) 285 d_stop = last_rec - ((last_rec - blocks_per_page + 1) % 286 blocks_per_page); 287 else 288 d_stop = last_rec; 289 290 cur_pos += d_stop - (first_rec + cur_pos) + 1; 291 count++; 292 } 293 294 if (cur_pos == 0 || first_rec + cur_pos - 1 < last_rec) 295 count++; 296 297 return count; 298} 299 300/* 301 * This function builds a CCW request for block layer discard requests. 302 * Each page in the z/VM hypervisor that represents certain records of an FBA 303 * device will be padded with zeros. This is a special behaviour of the WRITE 304 * command which is triggered when no data payload is added to the CCW. 305 * 306 * Note: Due to issues in some z/VM versions, we can't fully utilise this 307 * special behaviour. We have to keep a 4k (or 8 block) alignment in mind to 308 * work around those issues and write actual zeroes to the unaligned parts in 309 * the request. This workaround might be removed in the future. 310 */ 311static struct dasd_ccw_req *dasd_fba_build_cp_discard( 312 struct dasd_device *memdev, 313 struct dasd_block *block, 314 struct request *req) 315{ 316 struct LO_fba_data *LO_data; 317 struct dasd_ccw_req *cqr; 318 struct ccw1 *ccw; 319 320 sector_t wz_stop = 0, d_stop = 0; 321 sector_t first_rec, last_rec; 322 323 unsigned int blksize = block->bp_block; 324 unsigned int blocks_per_page; 325 int wz_count = 0; 326 int d_count = 0; 327 int cur_pos = 0; /* Current position within the extent */ 328 int count = 0; 329 int cplength; 330 int datasize; 331 int nr_ccws; 332 333 first_rec = blk_rq_pos(req) >> block->s2b_shift; 334 last_rec = 335 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 336 count = last_rec - first_rec + 1; 337 338 blocks_per_page = BLOCKS_PER_PAGE(blksize); 339 nr_ccws = count_ccws(first_rec, last_rec, blocks_per_page); 340 341 /* define extent + nr_ccws * locate record + nr_ccws * single CCW */ 342 cplength = 1 + 2 * nr_ccws; 343 datasize = sizeof(struct DE_fba_data) + 344 nr_ccws * (sizeof(struct LO_fba_data) + sizeof(struct ccw1)); 345 346 cqr = dasd_smalloc_request(DASD_FBA_MAGIC, cplength, datasize, memdev, 347 blk_mq_rq_to_pdu(req)); 348 if (IS_ERR(cqr)) 349 return cqr; 350 351 ccw = cqr->cpaddr; 352 353 define_extent(ccw++, cqr->data, WRITE, blksize, first_rec, count); 354 LO_data = cqr->data + sizeof(struct DE_fba_data); 355 356 /* First part is not aligned. Calculate range to write zeroes. */ 357 if (first_rec % blocks_per_page != 0) { 358 wz_stop = first_rec + blocks_per_page - 359 (first_rec % blocks_per_page) - 1; 360 if (wz_stop > last_rec) 361 wz_stop = last_rec; 362 wz_count = wz_stop - first_rec + 1; 363 364 ccw[-1].flags |= CCW_FLAG_CC; 365 locate_record(ccw++, LO_data++, WRITE, cur_pos, wz_count); 366 367 ccw[-1].flags |= CCW_FLAG_CC; 368 ccw_write_zero(ccw++, wz_count * blksize); 369 370 cur_pos = wz_count; 371 } 372 373 /* We can do proper discard when we've got at least blocks_per_page blocks. */ 374 if (last_rec - (first_rec + cur_pos) + 1 >= blocks_per_page) { 375 /* is last record at page boundary? */ 376 if ((last_rec - blocks_per_page + 1) % blocks_per_page != 0) 377 d_stop = last_rec - ((last_rec - blocks_per_page + 1) % 378 blocks_per_page); 379 else 380 d_stop = last_rec; 381 382 d_count = d_stop - (first_rec + cur_pos) + 1; 383 384 ccw[-1].flags |= CCW_FLAG_CC; 385 locate_record(ccw++, LO_data++, WRITE, cur_pos, d_count); 386 387 ccw[-1].flags |= CCW_FLAG_CC; 388 ccw_write_no_data(ccw++); 389 390 cur_pos += d_count; 391 } 392 393 /* We might still have some bits left which need to be zeroed. */ 394 if (cur_pos == 0 || first_rec + cur_pos - 1 < last_rec) { 395 if (d_stop != 0) 396 wz_count = last_rec - d_stop; 397 else if (wz_stop != 0) 398 wz_count = last_rec - wz_stop; 399 else 400 wz_count = count; 401 402 ccw[-1].flags |= CCW_FLAG_CC; 403 locate_record(ccw++, LO_data++, WRITE, cur_pos, wz_count); 404 405 ccw[-1].flags |= CCW_FLAG_CC; 406 ccw_write_zero(ccw++, wz_count * blksize); 407 } 408 409 if (blk_noretry_request(req) || 410 block->base->features & DASD_FEATURE_FAILFAST) 411 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 412 413 cqr->startdev = memdev; 414 cqr->memdev = memdev; 415 cqr->block = block; 416 cqr->expires = memdev->default_expires * HZ; /* default 5 minutes */ 417 cqr->retries = memdev->default_retries; 418 cqr->buildclk = get_tod_clock(); 419 cqr->status = DASD_CQR_FILLED; 420 421 return cqr; 422} 423 424static struct dasd_ccw_req *dasd_fba_build_cp_regular( 425 struct dasd_device *memdev, 426 struct dasd_block *block, 427 struct request *req) 428{ 429 struct dasd_fba_private *private = block->base->private; 430 dma64_t *idaws; 431 struct LO_fba_data *LO_data; 432 struct dasd_ccw_req *cqr; 433 struct ccw1 *ccw; 434 struct req_iterator iter; 435 struct bio_vec bv; 436 char *dst; 437 int count, cidaw, cplength, datasize; 438 sector_t recid, first_rec, last_rec; 439 unsigned int blksize, off; 440 unsigned char cmd; 441 442 if (rq_data_dir(req) == READ) { 443 cmd = DASD_FBA_CCW_READ; 444 } else if (rq_data_dir(req) == WRITE) { 445 cmd = DASD_FBA_CCW_WRITE; 446 } else 447 return ERR_PTR(-EINVAL); 448 blksize = block->bp_block; 449 /* Calculate record id of first and last block. */ 450 first_rec = blk_rq_pos(req) >> block->s2b_shift; 451 last_rec = 452 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 453 /* Check struct bio and count the number of blocks for the request. */ 454 count = 0; 455 cidaw = 0; 456 rq_for_each_segment(bv, req, iter) { 457 if (bv.bv_len & (blksize - 1)) 458 /* Fba can only do full blocks. */ 459 return ERR_PTR(-EINVAL); 460 count += bv.bv_len >> (block->s2b_shift + 9); 461 if (idal_is_needed (page_address(bv.bv_page), bv.bv_len)) 462 cidaw += bv.bv_len / blksize; 463 } 464 /* Paranoia. */ 465 if (count != last_rec - first_rec + 1) 466 return ERR_PTR(-EINVAL); 467 /* 1x define extent + 1x locate record + number of blocks */ 468 cplength = 2 + count; 469 /* 1x define extent + 1x locate record */ 470 datasize = sizeof(struct DE_fba_data) + sizeof(struct LO_fba_data) + 471 cidaw * sizeof(unsigned long); 472 /* 473 * Find out number of additional locate record ccws if the device 474 * can't do data chaining. 475 */ 476 if (private->rdc_data.mode.bits.data_chain == 0) { 477 cplength += count - 1; 478 datasize += (count - 1)*sizeof(struct LO_fba_data); 479 } 480 /* Allocate the ccw request. */ 481 cqr = dasd_smalloc_request(DASD_FBA_MAGIC, cplength, datasize, memdev, 482 blk_mq_rq_to_pdu(req)); 483 if (IS_ERR(cqr)) 484 return cqr; 485 ccw = cqr->cpaddr; 486 /* First ccw is define extent. */ 487 define_extent(ccw++, cqr->data, rq_data_dir(req), 488 block->bp_block, blk_rq_pos(req), blk_rq_sectors(req)); 489 /* Build locate_record + read/write ccws. */ 490 idaws = (dma64_t *)(cqr->data + sizeof(struct DE_fba_data)); 491 LO_data = (struct LO_fba_data *) (idaws + cidaw); 492 /* Locate record for all blocks for smart devices. */ 493 if (private->rdc_data.mode.bits.data_chain != 0) { 494 ccw[-1].flags |= CCW_FLAG_CC; 495 locate_record(ccw++, LO_data++, rq_data_dir(req), 0, count); 496 } 497 recid = first_rec; 498 rq_for_each_segment(bv, req, iter) { 499 dst = bvec_virt(&bv); 500 if (dasd_page_cache) { 501 char *copy = kmem_cache_alloc(dasd_page_cache, 502 GFP_DMA | __GFP_NOWARN); 503 if (copy && rq_data_dir(req) == WRITE) 504 memcpy(copy + bv.bv_offset, dst, bv.bv_len); 505 if (copy) 506 dst = copy + bv.bv_offset; 507 } 508 for (off = 0; off < bv.bv_len; off += blksize) { 509 /* Locate record for stupid devices. */ 510 if (private->rdc_data.mode.bits.data_chain == 0) { 511 ccw[-1].flags |= CCW_FLAG_CC; 512 locate_record(ccw, LO_data++, 513 rq_data_dir(req), 514 recid - first_rec, 1); 515 ccw->flags = CCW_FLAG_CC; 516 ccw++; 517 } else { 518 if (recid > first_rec) 519 ccw[-1].flags |= CCW_FLAG_DC; 520 else 521 ccw[-1].flags |= CCW_FLAG_CC; 522 } 523 ccw->cmd_code = cmd; 524 ccw->count = block->bp_block; 525 if (idal_is_needed(dst, blksize)) { 526 ccw->cda = virt_to_dma32(idaws); 527 ccw->flags = CCW_FLAG_IDA; 528 idaws = idal_create_words(idaws, dst, blksize); 529 } else { 530 ccw->cda = virt_to_dma32(dst); 531 ccw->flags = 0; 532 } 533 ccw++; 534 dst += blksize; 535 recid++; 536 } 537 } 538 if (blk_noretry_request(req) || 539 block->base->features & DASD_FEATURE_FAILFAST) 540 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 541 cqr->startdev = memdev; 542 cqr->memdev = memdev; 543 cqr->block = block; 544 cqr->expires = memdev->default_expires * HZ; /* default 5 minutes */ 545 cqr->retries = memdev->default_retries; 546 cqr->buildclk = get_tod_clock(); 547 cqr->status = DASD_CQR_FILLED; 548 return cqr; 549} 550 551static struct dasd_ccw_req *dasd_fba_build_cp(struct dasd_device *memdev, 552 struct dasd_block *block, 553 struct request *req) 554{ 555 if (req_op(req) == REQ_OP_DISCARD || req_op(req) == REQ_OP_WRITE_ZEROES) 556 return dasd_fba_build_cp_discard(memdev, block, req); 557 else 558 return dasd_fba_build_cp_regular(memdev, block, req); 559} 560 561static int 562dasd_fba_free_cp(struct dasd_ccw_req *cqr, struct request *req) 563{ 564 struct dasd_fba_private *private = cqr->block->base->private; 565 struct ccw1 *ccw; 566 struct req_iterator iter; 567 struct bio_vec bv; 568 char *dst, *cda; 569 unsigned int blksize, off; 570 int status; 571 572 if (!dasd_page_cache) 573 goto out; 574 blksize = cqr->block->bp_block; 575 ccw = cqr->cpaddr; 576 /* Skip over define extent & locate record. */ 577 ccw++; 578 if (private->rdc_data.mode.bits.data_chain != 0) 579 ccw++; 580 rq_for_each_segment(bv, req, iter) { 581 dst = bvec_virt(&bv); 582 for (off = 0; off < bv.bv_len; off += blksize) { 583 /* Skip locate record. */ 584 if (private->rdc_data.mode.bits.data_chain == 0) 585 ccw++; 586 if (dst) { 587 if (ccw->flags & CCW_FLAG_IDA) 588 cda = *((char **)dma32_to_virt(ccw->cda)); 589 else 590 cda = dma32_to_virt(ccw->cda); 591 if (dst != cda) { 592 if (rq_data_dir(req) == READ) 593 memcpy(dst, cda, bv.bv_len); 594 kmem_cache_free(dasd_page_cache, 595 (void *)((addr_t)cda & PAGE_MASK)); 596 } 597 dst = NULL; 598 } 599 ccw++; 600 } 601 } 602out: 603 status = cqr->status == DASD_CQR_DONE; 604 dasd_sfree_request(cqr, cqr->memdev); 605 return status; 606} 607 608static void dasd_fba_handle_terminated_request(struct dasd_ccw_req *cqr) 609{ 610 if (cqr->retries < 0) 611 cqr->status = DASD_CQR_FAILED; 612 else 613 cqr->status = DASD_CQR_FILLED; 614}; 615 616static int 617dasd_fba_fill_info(struct dasd_device * device, 618 struct dasd_information2_t * info) 619{ 620 struct dasd_fba_private *private = device->private; 621 622 info->label_block = 1; 623 info->FBA_layout = 1; 624 info->format = DASD_FORMAT_LDL; 625 info->characteristics_size = sizeof(private->rdc_data); 626 memcpy(info->characteristics, &private->rdc_data, 627 sizeof(private->rdc_data)); 628 info->confdata_size = 0; 629 return 0; 630} 631 632static void 633dasd_fba_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 634 char *reason) 635{ 636 u64 *sense; 637 638 sense = (u64 *) dasd_get_sense(irb); 639 if (sense) { 640 DBF_DEV_EVENT(DBF_EMERG, device, 641 "%s: %s %02x%02x%02x %016llx %016llx %016llx " 642 "%016llx", reason, 643 scsw_is_tm(&irb->scsw) ? "t" : "c", 644 scsw_cc(&irb->scsw), scsw_cstat(&irb->scsw), 645 scsw_dstat(&irb->scsw), sense[0], sense[1], 646 sense[2], sense[3]); 647 } else { 648 DBF_DEV_EVENT(DBF_EMERG, device, "%s", 649 "SORRY - NO VALID SENSE AVAILABLE\n"); 650 } 651} 652 653 654static void 655dasd_fba_dump_sense(struct dasd_device *device, struct dasd_ccw_req * req, 656 struct irb *irb) 657{ 658 struct ccw1 *act, *end, *last; 659 int len, sl, sct, count; 660 struct device *dev; 661 char *page; 662 663 dev = &device->cdev->dev; 664 665 page = (char *) get_zeroed_page(GFP_ATOMIC); 666 if (page == NULL) { 667 DBF_DEV_EVENT(DBF_WARNING, device, "%s", 668 "No memory to dump sense data"); 669 return; 670 } 671 len = sprintf(page, "I/O status report:\n"); 672 len += sprintf(page + len, "in req: %px CS: 0x%02X DS: 0x%02X\n", 673 req, irb->scsw.cmd.cstat, irb->scsw.cmd.dstat); 674 len += sprintf(page + len, "Failing CCW: %px\n", 675 (void *)(u64)dma32_to_u32(irb->scsw.cmd.cpa)); 676 if (irb->esw.esw0.erw.cons) { 677 for (sl = 0; sl < 4; sl++) { 678 len += sprintf(page + len, "Sense(hex) %2d-%2d:", 679 (8 * sl), ((8 * sl) + 7)); 680 681 for (sct = 0; sct < 8; sct++) { 682 len += sprintf(page + len, " %02x", 683 irb->ecw[8 * sl + sct]); 684 } 685 len += sprintf(page + len, "\n"); 686 } 687 } else { 688 len += sprintf(page + len, "SORRY - NO VALID SENSE AVAILABLE\n"); 689 } 690 dev_err(dev, "%s", page); 691 692 /* dump the Channel Program */ 693 /* print first CCWs (maximum 8) */ 694 act = req->cpaddr; 695 for (last = act; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 696 end = min(act + 8, last); 697 len = sprintf(page, "Related CP in req: %px\n", req); 698 while (act <= end) { 699 len += sprintf(page + len, "CCW %px: %08X %08X DAT:", 700 act, ((int *) act)[0], ((int *) act)[1]); 701 for (count = 0; count < 32 && count < act->count; 702 count += sizeof(int)) 703 len += sprintf(page + len, " %08X", 704 ((int *)dma32_to_virt(act->cda)) 705 [(count>>2)]); 706 len += sprintf(page + len, "\n"); 707 act++; 708 } 709 dev_err(dev, "%s", page); 710 711 /* print failing CCW area */ 712 len = 0; 713 if (act < ((struct ccw1 *)dma32_to_virt(irb->scsw.cmd.cpa)) - 2) { 714 act = ((struct ccw1 *)dma32_to_virt(irb->scsw.cmd.cpa)) - 2; 715 len += sprintf(page + len, "......\n"); 716 } 717 end = min((struct ccw1 *)dma32_to_virt(irb->scsw.cmd.cpa) + 2, last); 718 while (act <= end) { 719 len += sprintf(page + len, "CCW %px: %08X %08X DAT:", 720 act, ((int *) act)[0], ((int *) act)[1]); 721 for (count = 0; count < 32 && count < act->count; 722 count += sizeof(int)) 723 len += sprintf(page + len, " %08X", 724 ((int *)dma32_to_virt(act->cda)) 725 [(count>>2)]); 726 len += sprintf(page + len, "\n"); 727 act++; 728 } 729 730 /* print last CCWs */ 731 if (act < last - 2) { 732 act = last - 2; 733 len += sprintf(page + len, "......\n"); 734 } 735 while (act <= last) { 736 len += sprintf(page + len, "CCW %px: %08X %08X DAT:", 737 act, ((int *) act)[0], ((int *) act)[1]); 738 for (count = 0; count < 32 && count < act->count; 739 count += sizeof(int)) 740 len += sprintf(page + len, " %08X", 741 ((int *)dma32_to_virt(act->cda)) 742 [(count>>2)]); 743 len += sprintf(page + len, "\n"); 744 act++; 745 } 746 if (len > 0) 747 dev_err(dev, "%s", page); 748 free_page((unsigned long) page); 749} 750 751static unsigned int dasd_fba_max_sectors(struct dasd_block *block) 752{ 753 return DASD_FBA_MAX_BLOCKS << block->s2b_shift; 754} 755 756static int dasd_fba_pe_handler(struct dasd_device *device, 757 __u8 tbvpm, __u8 fcsecpm) 758{ 759 return dasd_generic_verify_path(device, tbvpm); 760} 761 762static struct dasd_discipline dasd_fba_discipline = { 763 .owner = THIS_MODULE, 764 .name = "FBA ", 765 .ebcname = "FBA ", 766 .has_discard = true, 767 .check_device = dasd_fba_check_characteristics, 768 .do_analysis = dasd_fba_do_analysis, 769 .pe_handler = dasd_fba_pe_handler, 770 .max_sectors = dasd_fba_max_sectors, 771 .fill_geometry = dasd_fba_fill_geometry, 772 .start_IO = dasd_start_IO, 773 .term_IO = dasd_term_IO, 774 .handle_terminated_request = dasd_fba_handle_terminated_request, 775 .erp_action = dasd_fba_erp_action, 776 .erp_postaction = dasd_fba_erp_postaction, 777 .check_for_device_change = dasd_fba_check_for_device_change, 778 .build_cp = dasd_fba_build_cp, 779 .free_cp = dasd_fba_free_cp, 780 .dump_sense = dasd_fba_dump_sense, 781 .dump_sense_dbf = dasd_fba_dump_sense_dbf, 782 .fill_info = dasd_fba_fill_info, 783}; 784 785static int __init 786dasd_fba_init(void) 787{ 788 int ret; 789 790 ASCEBC(dasd_fba_discipline.ebcname, 4); 791 792 dasd_fba_zero_page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); 793 if (!dasd_fba_zero_page) 794 return -ENOMEM; 795 796 ret = ccw_driver_register(&dasd_fba_driver); 797 if (!ret) 798 wait_for_device_probe(); 799 800 return ret; 801} 802 803static void __exit 804dasd_fba_cleanup(void) 805{ 806 ccw_driver_unregister(&dasd_fba_driver); 807 free_page((unsigned long)dasd_fba_zero_page); 808} 809 810module_init(dasd_fba_init); 811module_exit(dasd_fba_cleanup); 812