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1// SPDX-License-Identifier: GPL-2.02/*3 * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>4 * Bugreports.to..: <Linux390@de.ibm.com>5 * Copyright IBM Corp. 1999, 20096 */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 3229 30#define DASD_FBA_CCW_WRITE 0x4131#define DASD_FBA_CCW_READ 0x4232#define DASD_FBA_CCW_LOCATE 0x4333#define DASD_FBA_CCW_DEFINE_EXTENT 0x6334 35MODULE_DESCRIPTION("S/390 DASD FBA Disks device driver");36MODULE_LICENSE("GPL");37 38static struct dasd_discipline dasd_fba_discipline;39static void *dasd_fba_zero_page;40 41struct dasd_fba_private {42 struct dasd_fba_characteristics rdc_data;43};44 45static struct ccw_device_id dasd_fba_ids[] = {46 { CCW_DEVICE_DEVTYPE (0x6310, 0, 0x9336, 0), .driver_info = 0x1},47 { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3370, 0), .driver_info = 0x2},48 { /* end of list */ },49};50 51MODULE_DEVICE_TABLE(ccw, dasd_fba_ids);52 53static int54dasd_fba_set_online(struct ccw_device *cdev)55{56 return dasd_generic_set_online(cdev, &dasd_fba_discipline);57}58 59static struct ccw_driver dasd_fba_driver = {60 .driver = {61 .name = "dasd-fba",62 .owner = THIS_MODULE,63 .dev_groups = dasd_dev_groups,64 },65 .ids = dasd_fba_ids,66 .probe = dasd_generic_probe,67 .remove = dasd_generic_remove,68 .set_offline = dasd_generic_set_offline,69 .set_online = dasd_fba_set_online,70 .notify = dasd_generic_notify,71 .path_event = dasd_generic_path_event,72 .int_class = IRQIO_DAS,73};74 75static void76define_extent(struct ccw1 * ccw, struct DE_fba_data *data, int rw,77 int blksize, int beg, int nr)78{79 ccw->cmd_code = DASD_FBA_CCW_DEFINE_EXTENT;80 ccw->flags = 0;81 ccw->count = 16;82 ccw->cda = virt_to_dma32(data);83 memset(data, 0, sizeof (struct DE_fba_data));84 if (rw == WRITE)85 (data->mask).perm = 0x0;86 else if (rw == READ)87 (data->mask).perm = 0x1;88 else89 data->mask.perm = 0x2;90 data->blk_size = blksize;91 data->ext_loc = beg;92 data->ext_end = nr - 1;93}94 95static void96locate_record(struct ccw1 * ccw, struct LO_fba_data *data, int rw,97 int block_nr, int block_ct)98{99 ccw->cmd_code = DASD_FBA_CCW_LOCATE;100 ccw->flags = 0;101 ccw->count = 8;102 ccw->cda = virt_to_dma32(data);103 memset(data, 0, sizeof (struct LO_fba_data));104 if (rw == WRITE)105 data->operation.cmd = 0x5;106 else if (rw == READ)107 data->operation.cmd = 0x6;108 else109 data->operation.cmd = 0x8;110 data->blk_nr = block_nr;111 data->blk_ct = block_ct;112}113 114static int115dasd_fba_check_characteristics(struct dasd_device *device)116{117 struct dasd_fba_private *private = device->private;118 struct ccw_device *cdev = device->cdev;119 struct dasd_block *block;120 int readonly, rc;121 122 if (!private) {123 private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA);124 if (!private) {125 dev_warn(&device->cdev->dev,126 "Allocating memory for private DASD "127 "data failed\n");128 return -ENOMEM;129 }130 device->private = private;131 } else {132 memset(private, 0, sizeof(*private));133 }134 block = dasd_alloc_block();135 if (IS_ERR(block)) {136 DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s", "could not allocate "137 "dasd block structure");138 device->private = NULL;139 kfree(private);140 return PTR_ERR(block);141 }142 device->block = block;143 block->base = device;144 145 /* Read Device Characteristics */146 rc = dasd_generic_read_dev_chars(device, DASD_FBA_MAGIC,147 &private->rdc_data, 32);148 if (rc) {149 DBF_EVENT_DEVID(DBF_WARNING, cdev, "Read device "150 "characteristics returned error %d", rc);151 device->block = NULL;152 dasd_free_block(block);153 device->private = NULL;154 kfree(private);155 return rc;156 }157 158 device->default_expires = DASD_EXPIRES;159 device->default_retries = FBA_DEFAULT_RETRIES;160 dasd_path_set_opm(device, LPM_ANYPATH);161 162 readonly = dasd_device_is_ro(device);163 if (readonly)164 set_bit(DASD_FLAG_DEVICE_RO, &device->flags);165 166 /* FBA supports discard, set the according feature bit */167 dasd_set_feature(cdev, DASD_FEATURE_DISCARD, 1);168 169 dev_info(&device->cdev->dev,170 "New FBA DASD %04X/%02X (CU %04X/%02X) with %d MB "171 "and %d B/blk%s\n",172 cdev->id.dev_type,173 cdev->id.dev_model,174 cdev->id.cu_type,175 cdev->id.cu_model,176 ((private->rdc_data.blk_bdsa *177 (private->rdc_data.blk_size >> 9)) >> 11),178 private->rdc_data.blk_size,179 readonly ? ", read-only device" : "");180 return 0;181}182 183static int dasd_fba_do_analysis(struct dasd_block *block)184{185 struct dasd_fba_private *private = block->base->private;186 int sb, rc;187 188 rc = dasd_check_blocksize(private->rdc_data.blk_size);189 if (rc) {190 DBF_DEV_EVENT(DBF_WARNING, block->base, "unknown blocksize %d",191 private->rdc_data.blk_size);192 return rc;193 }194 block->blocks = private->rdc_data.blk_bdsa;195 block->bp_block = private->rdc_data.blk_size;196 block->s2b_shift = 0; /* bits to shift 512 to get a block */197 for (sb = 512; sb < private->rdc_data.blk_size; sb = sb << 1)198 block->s2b_shift++;199 return 0;200}201 202static int dasd_fba_fill_geometry(struct dasd_block *block,203 struct hd_geometry *geo)204{205 if (dasd_check_blocksize(block->bp_block) != 0)206 return -EINVAL;207 geo->cylinders = (block->blocks << block->s2b_shift) >> 10;208 geo->heads = 16;209 geo->sectors = 128 >> block->s2b_shift;210 return 0;211}212 213static dasd_erp_fn_t214dasd_fba_erp_action(struct dasd_ccw_req * cqr)215{216 return dasd_default_erp_action;217}218 219static dasd_erp_fn_t220dasd_fba_erp_postaction(struct dasd_ccw_req * cqr)221{222 if (cqr->function == dasd_default_erp_action)223 return dasd_default_erp_postaction;224 225 DBF_DEV_EVENT(DBF_WARNING, cqr->startdev, "unknown ERP action %p",226 cqr->function);227 return NULL;228}229 230static void dasd_fba_check_for_device_change(struct dasd_device *device,231 struct dasd_ccw_req *cqr,232 struct irb *irb)233{234 char mask;235 236 /* first of all check for state change pending interrupt */237 mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP;238 if ((irb->scsw.cmd.dstat & mask) == mask)239 dasd_generic_handle_state_change(device);240};241 242 243/*244 * Builds a CCW with no data payload245 */246static void ccw_write_no_data(struct ccw1 *ccw)247{248 ccw->cmd_code = DASD_FBA_CCW_WRITE;249 ccw->flags |= CCW_FLAG_SLI;250 ccw->count = 0;251}252 253/*254 * Builds a CCW that writes only zeroes.255 */256static void ccw_write_zero(struct ccw1 *ccw, int count)257{258 ccw->cmd_code = DASD_FBA_CCW_WRITE;259 ccw->flags |= CCW_FLAG_SLI;260 ccw->count = count;261 ccw->cda = virt_to_dma32(dasd_fba_zero_page);262}263 264/*265 * Helper function to count the amount of necessary CCWs within a given range266 * with 4k alignment and command chaining in mind.267 */268static int count_ccws(sector_t first_rec, sector_t last_rec,269 unsigned int blocks_per_page)270{271 sector_t wz_stop = 0, d_stop = 0;272 int cur_pos = 0;273 int count = 0;274 275 if (first_rec % blocks_per_page != 0) {276 wz_stop = first_rec + blocks_per_page -277 (first_rec % blocks_per_page) - 1;278 if (wz_stop > last_rec)279 wz_stop = last_rec;280 cur_pos = wz_stop - first_rec + 1;281 count++;282 }283 284 if (last_rec - (first_rec + cur_pos) + 1 >= blocks_per_page) {285 if ((last_rec - blocks_per_page + 1) % blocks_per_page != 0)286 d_stop = last_rec - ((last_rec - blocks_per_page + 1) %287 blocks_per_page);288 else289 d_stop = last_rec;290 291 cur_pos += d_stop - (first_rec + cur_pos) + 1;292 count++;293 }294 295 if (cur_pos == 0 || first_rec + cur_pos - 1 < last_rec)296 count++;297 298 return count;299}300 301/*302 * This function builds a CCW request for block layer discard requests.303 * Each page in the z/VM hypervisor that represents certain records of an FBA304 * device will be padded with zeros. This is a special behaviour of the WRITE305 * command which is triggered when no data payload is added to the CCW.306 *307 * Note: Due to issues in some z/VM versions, we can't fully utilise this308 * special behaviour. We have to keep a 4k (or 8 block) alignment in mind to309 * work around those issues and write actual zeroes to the unaligned parts in310 * the request. This workaround might be removed in the future.311 */312static struct dasd_ccw_req *dasd_fba_build_cp_discard(313 struct dasd_device *memdev,314 struct dasd_block *block,315 struct request *req)316{317 struct LO_fba_data *LO_data;318 struct dasd_ccw_req *cqr;319 struct ccw1 *ccw;320 321 sector_t wz_stop = 0, d_stop = 0;322 sector_t first_rec, last_rec;323 324 unsigned int blksize = block->bp_block;325 unsigned int blocks_per_page;326 int wz_count = 0;327 int d_count = 0;328 int cur_pos = 0; /* Current position within the extent */329 int count = 0;330 int cplength;331 int datasize;332 int nr_ccws;333 334 first_rec = blk_rq_pos(req) >> block->s2b_shift;335 last_rec =336 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift;337 count = last_rec - first_rec + 1;338 339 blocks_per_page = BLOCKS_PER_PAGE(blksize);340 nr_ccws = count_ccws(first_rec, last_rec, blocks_per_page);341 342 /* define extent + nr_ccws * locate record + nr_ccws * single CCW */343 cplength = 1 + 2 * nr_ccws;344 datasize = sizeof(struct DE_fba_data) +345 nr_ccws * (sizeof(struct LO_fba_data) + sizeof(struct ccw1));346 347 cqr = dasd_smalloc_request(DASD_FBA_MAGIC, cplength, datasize, memdev,348 blk_mq_rq_to_pdu(req));349 if (IS_ERR(cqr))350 return cqr;351 352 ccw = cqr->cpaddr;353 354 define_extent(ccw++, cqr->data, WRITE, blksize, first_rec, count);355 LO_data = cqr->data + sizeof(struct DE_fba_data);356 357 /* First part is not aligned. Calculate range to write zeroes. */358 if (first_rec % blocks_per_page != 0) {359 wz_stop = first_rec + blocks_per_page -360 (first_rec % blocks_per_page) - 1;361 if (wz_stop > last_rec)362 wz_stop = last_rec;363 wz_count = wz_stop - first_rec + 1;364 365 ccw[-1].flags |= CCW_FLAG_CC;366 locate_record(ccw++, LO_data++, WRITE, cur_pos, wz_count);367 368 ccw[-1].flags |= CCW_FLAG_CC;369 ccw_write_zero(ccw++, wz_count * blksize);370 371 cur_pos = wz_count;372 }373 374 /* We can do proper discard when we've got at least blocks_per_page blocks. */375 if (last_rec - (first_rec + cur_pos) + 1 >= blocks_per_page) {376 /* is last record at page boundary? */377 if ((last_rec - blocks_per_page + 1) % blocks_per_page != 0)378 d_stop = last_rec - ((last_rec - blocks_per_page + 1) %379 blocks_per_page);380 else381 d_stop = last_rec;382 383 d_count = d_stop - (first_rec + cur_pos) + 1;384 385 ccw[-1].flags |= CCW_FLAG_CC;386 locate_record(ccw++, LO_data++, WRITE, cur_pos, d_count);387 388 ccw[-1].flags |= CCW_FLAG_CC;389 ccw_write_no_data(ccw++);390 391 cur_pos += d_count;392 }393 394 /* We might still have some bits left which need to be zeroed. */395 if (cur_pos == 0 || first_rec + cur_pos - 1 < last_rec) {396 if (d_stop != 0)397 wz_count = last_rec - d_stop;398 else if (wz_stop != 0)399 wz_count = last_rec - wz_stop;400 else401 wz_count = count;402 403 ccw[-1].flags |= CCW_FLAG_CC;404 locate_record(ccw++, LO_data++, WRITE, cur_pos, wz_count);405 406 ccw[-1].flags |= CCW_FLAG_CC;407 ccw_write_zero(ccw++, wz_count * blksize);408 }409 410 if (blk_noretry_request(req) ||411 block->base->features & DASD_FEATURE_FAILFAST)412 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);413 414 cqr->startdev = memdev;415 cqr->memdev = memdev;416 cqr->block = block;417 cqr->expires = memdev->default_expires * HZ; /* default 5 minutes */418 cqr->retries = memdev->default_retries;419 cqr->buildclk = get_tod_clock();420 cqr->status = DASD_CQR_FILLED;421 422 return cqr;423}424 425static struct dasd_ccw_req *dasd_fba_build_cp_regular(426 struct dasd_device *memdev,427 struct dasd_block *block,428 struct request *req)429{430 struct dasd_fba_private *private = block->base->private;431 dma64_t *idaws;432 struct LO_fba_data *LO_data;433 struct dasd_ccw_req *cqr;434 struct ccw1 *ccw;435 struct req_iterator iter;436 struct bio_vec bv;437 char *dst;438 int count, cidaw, cplength, datasize;439 sector_t recid, first_rec, last_rec;440 unsigned int blksize, off;441 unsigned char cmd;442 443 if (rq_data_dir(req) == READ) {444 cmd = DASD_FBA_CCW_READ;445 } else if (rq_data_dir(req) == WRITE) {446 cmd = DASD_FBA_CCW_WRITE;447 } else448 return ERR_PTR(-EINVAL);449 blksize = block->bp_block;450 /* Calculate record id of first and last block. */451 first_rec = blk_rq_pos(req) >> block->s2b_shift;452 last_rec =453 (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift;454 /* Check struct bio and count the number of blocks for the request. */455 count = 0;456 cidaw = 0;457 rq_for_each_segment(bv, req, iter) {458 if (bv.bv_len & (blksize - 1))459 /* Fba can only do full blocks. */460 return ERR_PTR(-EINVAL);461 count += bv.bv_len >> (block->s2b_shift + 9);462 if (idal_is_needed (page_address(bv.bv_page), bv.bv_len))463 cidaw += bv.bv_len / blksize;464 }465 /* Paranoia. */466 if (count != last_rec - first_rec + 1)467 return ERR_PTR(-EINVAL);468 /* 1x define extent + 1x locate record + number of blocks */469 cplength = 2 + count;470 /* 1x define extent + 1x locate record */471 datasize = sizeof(struct DE_fba_data) + sizeof(struct LO_fba_data) +472 cidaw * sizeof(unsigned long);473 /*474 * Find out number of additional locate record ccws if the device475 * can't do data chaining.476 */477 if (private->rdc_data.mode.bits.data_chain == 0) {478 cplength += count - 1;479 datasize += (count - 1)*sizeof(struct LO_fba_data);480 }481 /* Allocate the ccw request. */482 cqr = dasd_smalloc_request(DASD_FBA_MAGIC, cplength, datasize, memdev,483 blk_mq_rq_to_pdu(req));484 if (IS_ERR(cqr))485 return cqr;486 ccw = cqr->cpaddr;487 /* First ccw is define extent. */488 define_extent(ccw++, cqr->data, rq_data_dir(req),489 block->bp_block, blk_rq_pos(req), blk_rq_sectors(req));490 /* Build locate_record + read/write ccws. */491 idaws = (dma64_t *)(cqr->data + sizeof(struct DE_fba_data));492 LO_data = (struct LO_fba_data *) (idaws + cidaw);493 /* Locate record for all blocks for smart devices. */494 if (private->rdc_data.mode.bits.data_chain != 0) {495 ccw[-1].flags |= CCW_FLAG_CC;496 locate_record(ccw++, LO_data++, rq_data_dir(req), 0, count);497 }498 recid = first_rec;499 rq_for_each_segment(bv, req, iter) {500 dst = bvec_virt(&bv);501 if (dasd_page_cache) {502 char *copy = kmem_cache_alloc(dasd_page_cache,503 GFP_DMA | __GFP_NOWARN);504 if (copy && rq_data_dir(req) == WRITE)505 memcpy(copy + bv.bv_offset, dst, bv.bv_len);506 if (copy)507 dst = copy + bv.bv_offset;508 }509 for (off = 0; off < bv.bv_len; off += blksize) {510 /* Locate record for stupid devices. */511 if (private->rdc_data.mode.bits.data_chain == 0) {512 ccw[-1].flags |= CCW_FLAG_CC;513 locate_record(ccw, LO_data++,514 rq_data_dir(req),515 recid - first_rec, 1);516 ccw->flags = CCW_FLAG_CC;517 ccw++;518 } else {519 if (recid > first_rec)520 ccw[-1].flags |= CCW_FLAG_DC;521 else522 ccw[-1].flags |= CCW_FLAG_CC;523 }524 ccw->cmd_code = cmd;525 ccw->count = block->bp_block;526 if (idal_is_needed(dst, blksize)) {527 ccw->cda = virt_to_dma32(idaws);528 ccw->flags = CCW_FLAG_IDA;529 idaws = idal_create_words(idaws, dst, blksize);530 } else {531 ccw->cda = virt_to_dma32(dst);532 ccw->flags = 0;533 }534 ccw++;535 dst += blksize;536 recid++;537 }538 }539 if (blk_noretry_request(req) ||540 block->base->features & DASD_FEATURE_FAILFAST)541 set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);542 cqr->startdev = memdev;543 cqr->memdev = memdev;544 cqr->block = block;545 cqr->expires = memdev->default_expires * HZ; /* default 5 minutes */546 cqr->retries = memdev->default_retries;547 cqr->buildclk = get_tod_clock();548 cqr->status = DASD_CQR_FILLED;549 return cqr;550}551 552static struct dasd_ccw_req *dasd_fba_build_cp(struct dasd_device *memdev,553 struct dasd_block *block,554 struct request *req)555{556 if (req_op(req) == REQ_OP_DISCARD || req_op(req) == REQ_OP_WRITE_ZEROES)557 return dasd_fba_build_cp_discard(memdev, block, req);558 else559 return dasd_fba_build_cp_regular(memdev, block, req);560}561 562static int563dasd_fba_free_cp(struct dasd_ccw_req *cqr, struct request *req)564{565 struct dasd_fba_private *private = cqr->block->base->private;566 struct ccw1 *ccw;567 struct req_iterator iter;568 struct bio_vec bv;569 char *dst, *cda;570 unsigned int blksize, off;571 int status;572 573 if (!dasd_page_cache)574 goto out;575 blksize = cqr->block->bp_block;576 ccw = cqr->cpaddr;577 /* Skip over define extent & locate record. */578 ccw++;579 if (private->rdc_data.mode.bits.data_chain != 0)580 ccw++;581 rq_for_each_segment(bv, req, iter) {582 dst = bvec_virt(&bv);583 for (off = 0; off < bv.bv_len; off += blksize) {584 /* Skip locate record. */585 if (private->rdc_data.mode.bits.data_chain == 0)586 ccw++;587 if (dst) {588 if (ccw->flags & CCW_FLAG_IDA)589 cda = dma64_to_virt(*((dma64_t *)dma32_to_virt(ccw->cda)));590 else591 cda = dma32_to_virt(ccw->cda);592 if (dst != cda) {593 if (rq_data_dir(req) == READ)594 memcpy(dst, cda, bv.bv_len);595 kmem_cache_free(dasd_page_cache,596 (void *)((addr_t)cda & PAGE_MASK));597 }598 dst = NULL;599 }600 ccw++;601 }602 }603out:604 status = cqr->status == DASD_CQR_DONE;605 dasd_sfree_request(cqr, cqr->memdev);606 return status;607}608 609static void dasd_fba_handle_terminated_request(struct dasd_ccw_req *cqr)610{611 if (cqr->retries < 0)612 cqr->status = DASD_CQR_FAILED;613 else614 cqr->status = DASD_CQR_FILLED;615};616 617static int618dasd_fba_fill_info(struct dasd_device * device,619 struct dasd_information2_t * info)620{621 struct dasd_fba_private *private = device->private;622 623 info->label_block = 1;624 info->FBA_layout = 1;625 info->format = DASD_FORMAT_LDL;626 info->characteristics_size = sizeof(private->rdc_data);627 memcpy(info->characteristics, &private->rdc_data,628 sizeof(private->rdc_data));629 info->confdata_size = 0;630 return 0;631}632 633static void634dasd_fba_dump_sense_dbf(struct dasd_device *device, struct irb *irb,635 char *reason)636{637 u64 *sense;638 639 sense = (u64 *) dasd_get_sense(irb);640 if (sense) {641 DBF_DEV_EVENT(DBF_EMERG, device,642 "%s: %s %02x%02x%02x %016llx %016llx %016llx "643 "%016llx", reason,644 scsw_is_tm(&irb->scsw) ? "t" : "c",645 scsw_cc(&irb->scsw), scsw_cstat(&irb->scsw),646 scsw_dstat(&irb->scsw), sense[0], sense[1],647 sense[2], sense[3]);648 } else {649 DBF_DEV_EVENT(DBF_EMERG, device, "%s",650 "SORRY - NO VALID SENSE AVAILABLE\n");651 }652}653 654 655static void656dasd_fba_dump_sense(struct dasd_device *device, struct dasd_ccw_req * req,657 struct irb *irb)658{659 struct ccw1 *act, *end, *last;660 int len, sl, sct, count;661 struct device *dev;662 char *page;663 664 dev = &device->cdev->dev;665 666 page = (char *) get_zeroed_page(GFP_ATOMIC);667 if (page == NULL) {668 DBF_DEV_EVENT(DBF_WARNING, device, "%s",669 "No memory to dump sense data");670 return;671 }672 len = sprintf(page, "I/O status report:\n");673 len += sprintf(page + len, "in req: %px CS: 0x%02X DS: 0x%02X\n",674 req, irb->scsw.cmd.cstat, irb->scsw.cmd.dstat);675 len += sprintf(page + len, "Failing CCW: %px\n",676 (void *)(u64)dma32_to_u32(irb->scsw.cmd.cpa));677 if (irb->esw.esw0.erw.cons) {678 for (sl = 0; sl < 4; sl++) {679 len += sprintf(page + len, "Sense(hex) %2d-%2d:",680 (8 * sl), ((8 * sl) + 7));681 682 for (sct = 0; sct < 8; sct++) {683 len += sprintf(page + len, " %02x",684 irb->ecw[8 * sl + sct]);685 }686 len += sprintf(page + len, "\n");687 }688 } else {689 len += sprintf(page + len, "SORRY - NO VALID SENSE AVAILABLE\n");690 }691 dev_err(dev, "%s", page);692 693 /* dump the Channel Program */694 /* print first CCWs (maximum 8) */695 act = req->cpaddr;696 for (last = act; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++);697 end = min(act + 8, last);698 len = sprintf(page, "Related CP in req: %px\n", req);699 while (act <= end) {700 len += sprintf(page + len, "CCW %px: %08X %08X DAT:",701 act, ((int *) act)[0], ((int *) act)[1]);702 for (count = 0; count < 32 && count < act->count;703 count += sizeof(int))704 len += sprintf(page + len, " %08X",705 ((int *)dma32_to_virt(act->cda))706 [(count>>2)]);707 len += sprintf(page + len, "\n");708 act++;709 }710 dev_err(dev, "%s", page);711 712 /* print failing CCW area */713 len = 0;714 if (act < ((struct ccw1 *)dma32_to_virt(irb->scsw.cmd.cpa)) - 2) {715 act = ((struct ccw1 *)dma32_to_virt(irb->scsw.cmd.cpa)) - 2;716 len += sprintf(page + len, "......\n");717 }718 end = min((struct ccw1 *)dma32_to_virt(irb->scsw.cmd.cpa) + 2, last);719 while (act <= end) {720 len += sprintf(page + len, "CCW %px: %08X %08X DAT:",721 act, ((int *) act)[0], ((int *) act)[1]);722 for (count = 0; count < 32 && count < act->count;723 count += sizeof(int))724 len += sprintf(page + len, " %08X",725 ((int *)dma32_to_virt(act->cda))726 [(count>>2)]);727 len += sprintf(page + len, "\n");728 act++;729 }730 731 /* print last CCWs */732 if (act < last - 2) {733 act = last - 2;734 len += sprintf(page + len, "......\n");735 }736 while (act <= last) {737 len += sprintf(page + len, "CCW %px: %08X %08X DAT:",738 act, ((int *) act)[0], ((int *) act)[1]);739 for (count = 0; count < 32 && count < act->count;740 count += sizeof(int))741 len += sprintf(page + len, " %08X",742 ((int *)dma32_to_virt(act->cda))743 [(count>>2)]);744 len += sprintf(page + len, "\n");745 act++;746 }747 if (len > 0)748 dev_err(dev, "%s", page);749 free_page((unsigned long) page);750}751 752static unsigned int dasd_fba_max_sectors(struct dasd_block *block)753{754 return DASD_FBA_MAX_BLOCKS << block->s2b_shift;755}756 757static int dasd_fba_pe_handler(struct dasd_device *device,758 __u8 tbvpm, __u8 fcsecpm)759{760 return dasd_generic_verify_path(device, tbvpm);761}762 763static struct dasd_discipline dasd_fba_discipline = {764 .owner = THIS_MODULE,765 .name = "FBA ",766 .ebcname = "FBA ",767 .has_discard = true,768 .check_device = dasd_fba_check_characteristics,769 .do_analysis = dasd_fba_do_analysis,770 .pe_handler = dasd_fba_pe_handler,771 .max_sectors = dasd_fba_max_sectors,772 .fill_geometry = dasd_fba_fill_geometry,773 .start_IO = dasd_start_IO,774 .term_IO = dasd_term_IO,775 .handle_terminated_request = dasd_fba_handle_terminated_request,776 .erp_action = dasd_fba_erp_action,777 .erp_postaction = dasd_fba_erp_postaction,778 .check_for_device_change = dasd_fba_check_for_device_change,779 .build_cp = dasd_fba_build_cp,780 .free_cp = dasd_fba_free_cp,781 .dump_sense = dasd_fba_dump_sense,782 .dump_sense_dbf = dasd_fba_dump_sense_dbf,783 .fill_info = dasd_fba_fill_info,784};785 786static int __init787dasd_fba_init(void)788{789 int ret;790 791 ASCEBC(dasd_fba_discipline.ebcname, 4);792 793 dasd_fba_zero_page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);794 if (!dasd_fba_zero_page)795 return -ENOMEM;796 797 ret = ccw_driver_register(&dasd_fba_driver);798 if (!ret)799 wait_for_device_probe();800 801 return ret;802}803 804static void __exit805dasd_fba_cleanup(void)806{807 ccw_driver_unregister(&dasd_fba_driver);808 free_page((unsigned long)dasd_fba_zero_page);809}810 811module_init(dasd_fba_init);812module_exit(dasd_fba_cleanup);813