| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> |
| * Bugreports.to..: <Linux390@de.ibm.com> |
| * Copyright IBM Corp. 1999, 2009 |
| */ |
| |
| #define KMSG_COMPONENT "dasd-fba" |
| |
| #include <linux/stddef.h> |
| #include <linux/kernel.h> |
| #include <asm/debug.h> |
| |
| #include <linux/slab.h> |
| #include <linux/hdreg.h> /* HDIO_GETGEO */ |
| #include <linux/bio.h> |
| #include <linux/module.h> |
| #include <linux/init.h> |
| |
| #include <asm/idals.h> |
| #include <asm/ebcdic.h> |
| #include <asm/io.h> |
| #include <asm/ccwdev.h> |
| |
| #include "dasd_int.h" |
| #include "dasd_fba.h" |
| |
| #ifdef PRINTK_HEADER |
| #undef PRINTK_HEADER |
| #endif /* PRINTK_HEADER */ |
| #define PRINTK_HEADER "dasd(fba):" |
| |
| #define FBA_DEFAULT_RETRIES 32 |
| |
| #define DASD_FBA_CCW_WRITE 0x41 |
| #define DASD_FBA_CCW_READ 0x42 |
| #define DASD_FBA_CCW_LOCATE 0x43 |
| #define DASD_FBA_CCW_DEFINE_EXTENT 0x63 |
| |
| MODULE_LICENSE("GPL"); |
| |
| static struct dasd_discipline dasd_fba_discipline; |
| static void *dasd_fba_zero_page; |
| |
| struct dasd_fba_private { |
| struct dasd_fba_characteristics rdc_data; |
| }; |
| |
| static struct ccw_device_id dasd_fba_ids[] = { |
| { CCW_DEVICE_DEVTYPE (0x6310, 0, 0x9336, 0), .driver_info = 0x1}, |
| { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3370, 0), .driver_info = 0x2}, |
| { /* end of list */ }, |
| }; |
| |
| MODULE_DEVICE_TABLE(ccw, dasd_fba_ids); |
| |
| static int |
| dasd_fba_set_online(struct ccw_device *cdev) |
| { |
| return dasd_generic_set_online(cdev, &dasd_fba_discipline); |
| } |
| |
| static struct ccw_driver dasd_fba_driver = { |
| .driver = { |
| .name = "dasd-fba", |
| .owner = THIS_MODULE, |
| .dev_groups = dasd_dev_groups, |
| }, |
| .ids = dasd_fba_ids, |
| .probe = dasd_generic_probe, |
| .remove = dasd_generic_remove, |
| .set_offline = dasd_generic_set_offline, |
| .set_online = dasd_fba_set_online, |
| .notify = dasd_generic_notify, |
| .path_event = dasd_generic_path_event, |
| .int_class = IRQIO_DAS, |
| }; |
| |
| static void |
| define_extent(struct ccw1 * ccw, struct DE_fba_data *data, int rw, |
| int blksize, int beg, int nr) |
| { |
| ccw->cmd_code = DASD_FBA_CCW_DEFINE_EXTENT; |
| ccw->flags = 0; |
| ccw->count = 16; |
| ccw->cda = (__u32) __pa(data); |
| memset(data, 0, sizeof (struct DE_fba_data)); |
| if (rw == WRITE) |
| (data->mask).perm = 0x0; |
| else if (rw == READ) |
| (data->mask).perm = 0x1; |
| else |
| data->mask.perm = 0x2; |
| data->blk_size = blksize; |
| data->ext_loc = beg; |
| data->ext_end = nr - 1; |
| } |
| |
| static void |
| locate_record(struct ccw1 * ccw, struct LO_fba_data *data, int rw, |
| int block_nr, int block_ct) |
| { |
| ccw->cmd_code = DASD_FBA_CCW_LOCATE; |
| ccw->flags = 0; |
| ccw->count = 8; |
| ccw->cda = (__u32) __pa(data); |
| memset(data, 0, sizeof (struct LO_fba_data)); |
| if (rw == WRITE) |
| data->operation.cmd = 0x5; |
| else if (rw == READ) |
| data->operation.cmd = 0x6; |
| else |
| data->operation.cmd = 0x8; |
| data->blk_nr = block_nr; |
| data->blk_ct = block_ct; |
| } |
| |
| static int |
| dasd_fba_check_characteristics(struct dasd_device *device) |
| { |
| struct dasd_fba_private *private = device->private; |
| struct ccw_device *cdev = device->cdev; |
| struct dasd_block *block; |
| int readonly, rc; |
| |
| if (!private) { |
| private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); |
| if (!private) { |
| dev_warn(&device->cdev->dev, |
| "Allocating memory for private DASD " |
| "data failed\n"); |
| return -ENOMEM; |
| } |
| device->private = private; |
| } else { |
| memset(private, 0, sizeof(*private)); |
| } |
| block = dasd_alloc_block(); |
| if (IS_ERR(block)) { |
| DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s", "could not allocate " |
| "dasd block structure"); |
| device->private = NULL; |
| kfree(private); |
| return PTR_ERR(block); |
| } |
| device->block = block; |
| block->base = device; |
| |
| /* Read Device Characteristics */ |
| rc = dasd_generic_read_dev_chars(device, DASD_FBA_MAGIC, |
| &private->rdc_data, 32); |
| if (rc) { |
| DBF_EVENT_DEVID(DBF_WARNING, cdev, "Read device " |
| "characteristics returned error %d", rc); |
| device->block = NULL; |
| dasd_free_block(block); |
| device->private = NULL; |
| kfree(private); |
| return rc; |
| } |
| |
| device->default_expires = DASD_EXPIRES; |
| device->default_retries = FBA_DEFAULT_RETRIES; |
| dasd_path_set_opm(device, LPM_ANYPATH); |
| |
| readonly = dasd_device_is_ro(device); |
| if (readonly) |
| set_bit(DASD_FLAG_DEVICE_RO, &device->flags); |
| |
| /* FBA supports discard, set the according feature bit */ |
| dasd_set_feature(cdev, DASD_FEATURE_DISCARD, 1); |
| |
| dev_info(&device->cdev->dev, |
| "New FBA DASD %04X/%02X (CU %04X/%02X) with %d MB " |
| "and %d B/blk%s\n", |
| cdev->id.dev_type, |
| cdev->id.dev_model, |
| cdev->id.cu_type, |
| cdev->id.cu_model, |
| ((private->rdc_data.blk_bdsa * |
| (private->rdc_data.blk_size >> 9)) >> 11), |
| private->rdc_data.blk_size, |
| readonly ? ", read-only device" : ""); |
| return 0; |
| } |
| |
| static int dasd_fba_do_analysis(struct dasd_block *block) |
| { |
| struct dasd_fba_private *private = block->base->private; |
| int sb, rc; |
| |
| rc = dasd_check_blocksize(private->rdc_data.blk_size); |
| if (rc) { |
| DBF_DEV_EVENT(DBF_WARNING, block->base, "unknown blocksize %d", |
| private->rdc_data.blk_size); |
| return rc; |
| } |
| block->blocks = private->rdc_data.blk_bdsa; |
| block->bp_block = private->rdc_data.blk_size; |
| block->s2b_shift = 0; /* bits to shift 512 to get a block */ |
| for (sb = 512; sb < private->rdc_data.blk_size; sb = sb << 1) |
| block->s2b_shift++; |
| return 0; |
| } |
| |
| static int dasd_fba_fill_geometry(struct dasd_block *block, |
| struct hd_geometry *geo) |
| { |
| if (dasd_check_blocksize(block->bp_block) != 0) |
| return -EINVAL; |
| geo->cylinders = (block->blocks << block->s2b_shift) >> 10; |
| geo->heads = 16; |
| geo->sectors = 128 >> block->s2b_shift; |
| return 0; |
| } |
| |
| static dasd_erp_fn_t |
| dasd_fba_erp_action(struct dasd_ccw_req * cqr) |
| { |
| return dasd_default_erp_action; |
| } |
| |
| static dasd_erp_fn_t |
| dasd_fba_erp_postaction(struct dasd_ccw_req * cqr) |
| { |
| if (cqr->function == dasd_default_erp_action) |
| return dasd_default_erp_postaction; |
| |
| DBF_DEV_EVENT(DBF_WARNING, cqr->startdev, "unknown ERP action %p", |
| cqr->function); |
| return NULL; |
| } |
| |
| static void dasd_fba_check_for_device_change(struct dasd_device *device, |
| struct dasd_ccw_req *cqr, |
| struct irb *irb) |
| { |
| char mask; |
| |
| /* first of all check for state change pending interrupt */ |
| mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; |
| if ((irb->scsw.cmd.dstat & mask) == mask) |
| dasd_generic_handle_state_change(device); |
| }; |
| |
| |
| /* |
| * Builds a CCW with no data payload |
| */ |
| static void ccw_write_no_data(struct ccw1 *ccw) |
| { |
| ccw->cmd_code = DASD_FBA_CCW_WRITE; |
| ccw->flags |= CCW_FLAG_SLI; |
| ccw->count = 0; |
| } |
| |
| /* |
| * Builds a CCW that writes only zeroes. |
| */ |
| static void ccw_write_zero(struct ccw1 *ccw, int count) |
| { |
| ccw->cmd_code = DASD_FBA_CCW_WRITE; |
| ccw->flags |= CCW_FLAG_SLI; |
| ccw->count = count; |
| ccw->cda = (__u32) (addr_t) dasd_fba_zero_page; |
| } |
| |
| /* |
| * Helper function to count the amount of necessary CCWs within a given range |
| * with 4k alignment and command chaining in mind. |
| */ |
| static int count_ccws(sector_t first_rec, sector_t last_rec, |
| unsigned int blocks_per_page) |
| { |
| sector_t wz_stop = 0, d_stop = 0; |
| int cur_pos = 0; |
| int count = 0; |
| |
| if (first_rec % blocks_per_page != 0) { |
| wz_stop = first_rec + blocks_per_page - |
| (first_rec % blocks_per_page) - 1; |
| if (wz_stop > last_rec) |
| wz_stop = last_rec; |
| cur_pos = wz_stop - first_rec + 1; |
| count++; |
| } |
| |
| if (last_rec - (first_rec + cur_pos) + 1 >= blocks_per_page) { |
| if ((last_rec - blocks_per_page + 1) % blocks_per_page != 0) |
| d_stop = last_rec - ((last_rec - blocks_per_page + 1) % |
| blocks_per_page); |
| else |
| d_stop = last_rec; |
| |
| cur_pos += d_stop - (first_rec + cur_pos) + 1; |
| count++; |
| } |
| |
| if (cur_pos == 0 || first_rec + cur_pos - 1 < last_rec) |
| count++; |
| |
| return count; |
| } |
| |
| /* |
| * This function builds a CCW request for block layer discard requests. |
| * Each page in the z/VM hypervisor that represents certain records of an FBA |
| * device will be padded with zeros. This is a special behaviour of the WRITE |
| * command which is triggered when no data payload is added to the CCW. |
| * |
| * Note: Due to issues in some z/VM versions, we can't fully utilise this |
| * special behaviour. We have to keep a 4k (or 8 block) alignment in mind to |
| * work around those issues and write actual zeroes to the unaligned parts in |
| * the request. This workaround might be removed in the future. |
| */ |
| static struct dasd_ccw_req *dasd_fba_build_cp_discard( |
| struct dasd_device *memdev, |
| struct dasd_block *block, |
| struct request *req) |
| { |
| struct LO_fba_data *LO_data; |
| struct dasd_ccw_req *cqr; |
| struct ccw1 *ccw; |
| |
| sector_t wz_stop = 0, d_stop = 0; |
| sector_t first_rec, last_rec; |
| |
| unsigned int blksize = block->bp_block; |
| unsigned int blocks_per_page; |
| int wz_count = 0; |
| int d_count = 0; |
| int cur_pos = 0; /* Current position within the extent */ |
| int count = 0; |
| int cplength; |
| int datasize; |
| int nr_ccws; |
| |
| first_rec = blk_rq_pos(req) >> block->s2b_shift; |
| last_rec = |
| (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; |
| count = last_rec - first_rec + 1; |
| |
| blocks_per_page = BLOCKS_PER_PAGE(blksize); |
| nr_ccws = count_ccws(first_rec, last_rec, blocks_per_page); |
| |
| /* define extent + nr_ccws * locate record + nr_ccws * single CCW */ |
| cplength = 1 + 2 * nr_ccws; |
| datasize = sizeof(struct DE_fba_data) + |
| nr_ccws * (sizeof(struct LO_fba_data) + sizeof(struct ccw1)); |
| |
| cqr = dasd_smalloc_request(DASD_FBA_MAGIC, cplength, datasize, memdev, |
| blk_mq_rq_to_pdu(req)); |
| if (IS_ERR(cqr)) |
| return cqr; |
| |
| ccw = cqr->cpaddr; |
| |
| define_extent(ccw++, cqr->data, WRITE, blksize, first_rec, count); |
| LO_data = cqr->data + sizeof(struct DE_fba_data); |
| |
| /* First part is not aligned. Calculate range to write zeroes. */ |
| if (first_rec % blocks_per_page != 0) { |
| wz_stop = first_rec + blocks_per_page - |
| (first_rec % blocks_per_page) - 1; |
| if (wz_stop > last_rec) |
| wz_stop = last_rec; |
| wz_count = wz_stop - first_rec + 1; |
| |
| ccw[-1].flags |= CCW_FLAG_CC; |
| locate_record(ccw++, LO_data++, WRITE, cur_pos, wz_count); |
| |
| ccw[-1].flags |= CCW_FLAG_CC; |
| ccw_write_zero(ccw++, wz_count * blksize); |
| |
| cur_pos = wz_count; |
| } |
| |
| /* We can do proper discard when we've got at least blocks_per_page blocks. */ |
| if (last_rec - (first_rec + cur_pos) + 1 >= blocks_per_page) { |
| /* is last record at page boundary? */ |
| if ((last_rec - blocks_per_page + 1) % blocks_per_page != 0) |
| d_stop = last_rec - ((last_rec - blocks_per_page + 1) % |
| blocks_per_page); |
| else |
| d_stop = last_rec; |
| |
| d_count = d_stop - (first_rec + cur_pos) + 1; |
| |
| ccw[-1].flags |= CCW_FLAG_CC; |
| locate_record(ccw++, LO_data++, WRITE, cur_pos, d_count); |
| |
| ccw[-1].flags |= CCW_FLAG_CC; |
| ccw_write_no_data(ccw++); |
| |
| cur_pos += d_count; |
| } |
| |
| /* We might still have some bits left which need to be zeroed. */ |
| if (cur_pos == 0 || first_rec + cur_pos - 1 < last_rec) { |
| if (d_stop != 0) |
| wz_count = last_rec - d_stop; |
| else if (wz_stop != 0) |
| wz_count = last_rec - wz_stop; |
| else |
| wz_count = count; |
| |
| ccw[-1].flags |= CCW_FLAG_CC; |
| locate_record(ccw++, LO_data++, WRITE, cur_pos, wz_count); |
| |
| ccw[-1].flags |= CCW_FLAG_CC; |
| ccw_write_zero(ccw++, wz_count * blksize); |
| } |
| |
| if (blk_noretry_request(req) || |
| block->base->features & DASD_FEATURE_FAILFAST) |
| set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
| |
| cqr->startdev = memdev; |
| cqr->memdev = memdev; |
| cqr->block = block; |
| cqr->expires = memdev->default_expires * HZ; /* default 5 minutes */ |
| cqr->retries = memdev->default_retries; |
| cqr->buildclk = get_tod_clock(); |
| cqr->status = DASD_CQR_FILLED; |
| |
| return cqr; |
| } |
| |
| static struct dasd_ccw_req *dasd_fba_build_cp_regular( |
| struct dasd_device *memdev, |
| struct dasd_block *block, |
| struct request *req) |
| { |
| struct dasd_fba_private *private = block->base->private; |
| unsigned long *idaws; |
| struct LO_fba_data *LO_data; |
| struct dasd_ccw_req *cqr; |
| struct ccw1 *ccw; |
| struct req_iterator iter; |
| struct bio_vec bv; |
| char *dst; |
| int count, cidaw, cplength, datasize; |
| sector_t recid, first_rec, last_rec; |
| unsigned int blksize, off; |
| unsigned char cmd; |
| |
| if (rq_data_dir(req) == READ) { |
| cmd = DASD_FBA_CCW_READ; |
| } else if (rq_data_dir(req) == WRITE) { |
| cmd = DASD_FBA_CCW_WRITE; |
| } else |
| return ERR_PTR(-EINVAL); |
| blksize = block->bp_block; |
| /* Calculate record id of first and last block. */ |
| first_rec = blk_rq_pos(req) >> block->s2b_shift; |
| last_rec = |
| (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; |
| /* Check struct bio and count the number of blocks for the request. */ |
| count = 0; |
| cidaw = 0; |
| rq_for_each_segment(bv, req, iter) { |
| if (bv.bv_len & (blksize - 1)) |
| /* Fba can only do full blocks. */ |
| return ERR_PTR(-EINVAL); |
| count += bv.bv_len >> (block->s2b_shift + 9); |
| if (idal_is_needed (page_address(bv.bv_page), bv.bv_len)) |
| cidaw += bv.bv_len / blksize; |
| } |
| /* Paranoia. */ |
| if (count != last_rec - first_rec + 1) |
| return ERR_PTR(-EINVAL); |
| /* 1x define extent + 1x locate record + number of blocks */ |
| cplength = 2 + count; |
| /* 1x define extent + 1x locate record */ |
| datasize = sizeof(struct DE_fba_data) + sizeof(struct LO_fba_data) + |
| cidaw * sizeof(unsigned long); |
| /* |
| * Find out number of additional locate record ccws if the device |
| * can't do data chaining. |
| */ |
| if (private->rdc_data.mode.bits.data_chain == 0) { |
| cplength += count - 1; |
| datasize += (count - 1)*sizeof(struct LO_fba_data); |
| } |
| /* Allocate the ccw request. */ |
| cqr = dasd_smalloc_request(DASD_FBA_MAGIC, cplength, datasize, memdev, |
| blk_mq_rq_to_pdu(req)); |
| if (IS_ERR(cqr)) |
| return cqr; |
| ccw = cqr->cpaddr; |
| /* First ccw is define extent. */ |
| define_extent(ccw++, cqr->data, rq_data_dir(req), |
| block->bp_block, blk_rq_pos(req), blk_rq_sectors(req)); |
| /* Build locate_record + read/write ccws. */ |
| idaws = (unsigned long *) (cqr->data + sizeof(struct DE_fba_data)); |
| LO_data = (struct LO_fba_data *) (idaws + cidaw); |
| /* Locate record for all blocks for smart devices. */ |
| if (private->rdc_data.mode.bits.data_chain != 0) { |
| ccw[-1].flags |= CCW_FLAG_CC; |
| locate_record(ccw++, LO_data++, rq_data_dir(req), 0, count); |
| } |
| recid = first_rec; |
| rq_for_each_segment(bv, req, iter) { |
| dst = bvec_virt(&bv); |
| if (dasd_page_cache) { |
| char *copy = kmem_cache_alloc(dasd_page_cache, |
| GFP_DMA | __GFP_NOWARN); |
| if (copy && rq_data_dir(req) == WRITE) |
| memcpy(copy + bv.bv_offset, dst, bv.bv_len); |
| if (copy) |
| dst = copy + bv.bv_offset; |
| } |
| for (off = 0; off < bv.bv_len; off += blksize) { |
| /* Locate record for stupid devices. */ |
| if (private->rdc_data.mode.bits.data_chain == 0) { |
| ccw[-1].flags |= CCW_FLAG_CC; |
| locate_record(ccw, LO_data++, |
| rq_data_dir(req), |
| recid - first_rec, 1); |
| ccw->flags = CCW_FLAG_CC; |
| ccw++; |
| } else { |
| if (recid > first_rec) |
| ccw[-1].flags |= CCW_FLAG_DC; |
| else |
| ccw[-1].flags |= CCW_FLAG_CC; |
| } |
| ccw->cmd_code = cmd; |
| ccw->count = block->bp_block; |
| if (idal_is_needed(dst, blksize)) { |
| ccw->cda = (__u32)(addr_t) idaws; |
| ccw->flags = CCW_FLAG_IDA; |
| idaws = idal_create_words(idaws, dst, blksize); |
| } else { |
| ccw->cda = (__u32)(addr_t) dst; |
| ccw->flags = 0; |
| } |
| ccw++; |
| dst += blksize; |
| recid++; |
| } |
| } |
| if (blk_noretry_request(req) || |
| block->base->features & DASD_FEATURE_FAILFAST) |
| set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); |
| cqr->startdev = memdev; |
| cqr->memdev = memdev; |
| cqr->block = block; |
| cqr->expires = memdev->default_expires * HZ; /* default 5 minutes */ |
| cqr->retries = memdev->default_retries; |
| cqr->buildclk = get_tod_clock(); |
| cqr->status = DASD_CQR_FILLED; |
| return cqr; |
| } |
| |
| static struct dasd_ccw_req *dasd_fba_build_cp(struct dasd_device *memdev, |
| struct dasd_block *block, |
| struct request *req) |
| { |
| if (req_op(req) == REQ_OP_DISCARD || req_op(req) == REQ_OP_WRITE_ZEROES) |
| return dasd_fba_build_cp_discard(memdev, block, req); |
| else |
| return dasd_fba_build_cp_regular(memdev, block, req); |
| } |
| |
| static int |
| dasd_fba_free_cp(struct dasd_ccw_req *cqr, struct request *req) |
| { |
| struct dasd_fba_private *private = cqr->block->base->private; |
| struct ccw1 *ccw; |
| struct req_iterator iter; |
| struct bio_vec bv; |
| char *dst, *cda; |
| unsigned int blksize, off; |
| int status; |
| |
| if (!dasd_page_cache) |
| goto out; |
| blksize = cqr->block->bp_block; |
| ccw = cqr->cpaddr; |
| /* Skip over define extent & locate record. */ |
| ccw++; |
| if (private->rdc_data.mode.bits.data_chain != 0) |
| ccw++; |
| rq_for_each_segment(bv, req, iter) { |
| dst = bvec_virt(&bv); |
| for (off = 0; off < bv.bv_len; off += blksize) { |
| /* Skip locate record. */ |
| if (private->rdc_data.mode.bits.data_chain == 0) |
| ccw++; |
| if (dst) { |
| if (ccw->flags & CCW_FLAG_IDA) |
| cda = *((char **)((addr_t) ccw->cda)); |
| else |
| cda = (char *)((addr_t) ccw->cda); |
| if (dst != cda) { |
| if (rq_data_dir(req) == READ) |
| memcpy(dst, cda, bv.bv_len); |
| kmem_cache_free(dasd_page_cache, |
| (void *)((addr_t)cda & PAGE_MASK)); |
| } |
| dst = NULL; |
| } |
| ccw++; |
| } |
| } |
| out: |
| status = cqr->status == DASD_CQR_DONE; |
| dasd_sfree_request(cqr, cqr->memdev); |
| return status; |
| } |
| |
| static void dasd_fba_handle_terminated_request(struct dasd_ccw_req *cqr) |
| { |
| if (cqr->retries < 0) |
| cqr->status = DASD_CQR_FAILED; |
| else |
| cqr->status = DASD_CQR_FILLED; |
| }; |
| |
| static int |
| dasd_fba_fill_info(struct dasd_device * device, |
| struct dasd_information2_t * info) |
| { |
| struct dasd_fba_private *private = device->private; |
| |
| info->label_block = 1; |
| info->FBA_layout = 1; |
| info->format = DASD_FORMAT_LDL; |
| info->characteristics_size = sizeof(private->rdc_data); |
| memcpy(info->characteristics, &private->rdc_data, |
| sizeof(private->rdc_data)); |
| info->confdata_size = 0; |
| return 0; |
| } |
| |
| static void |
| dasd_fba_dump_sense_dbf(struct dasd_device *device, struct irb *irb, |
| char *reason) |
| { |
| u64 *sense; |
| |
| sense = (u64 *) dasd_get_sense(irb); |
| if (sense) { |
| DBF_DEV_EVENT(DBF_EMERG, device, |
| "%s: %s %02x%02x%02x %016llx %016llx %016llx " |
| "%016llx", reason, |
| scsw_is_tm(&irb->scsw) ? "t" : "c", |
| scsw_cc(&irb->scsw), scsw_cstat(&irb->scsw), |
| scsw_dstat(&irb->scsw), sense[0], sense[1], |
| sense[2], sense[3]); |
| } else { |
| DBF_DEV_EVENT(DBF_EMERG, device, "%s", |
| "SORRY - NO VALID SENSE AVAILABLE\n"); |
| } |
| } |
| |
| |
| static void |
| dasd_fba_dump_sense(struct dasd_device *device, struct dasd_ccw_req * req, |
| struct irb *irb) |
| { |
| char *page; |
| struct ccw1 *act, *end, *last; |
| int len, sl, sct, count; |
| |
| page = (char *) get_zeroed_page(GFP_ATOMIC); |
| if (page == NULL) { |
| DBF_DEV_EVENT(DBF_WARNING, device, "%s", |
| "No memory to dump sense data"); |
| return; |
| } |
| len = sprintf(page, PRINTK_HEADER |
| " I/O status report for device %s:\n", |
| dev_name(&device->cdev->dev)); |
| len += sprintf(page + len, PRINTK_HEADER |
| " in req: %p CS: 0x%02X DS: 0x%02X\n", req, |
| irb->scsw.cmd.cstat, irb->scsw.cmd.dstat); |
| len += sprintf(page + len, PRINTK_HEADER |
| " device %s: Failing CCW: %p\n", |
| dev_name(&device->cdev->dev), |
| (void *) (addr_t) irb->scsw.cmd.cpa); |
| if (irb->esw.esw0.erw.cons) { |
| for (sl = 0; sl < 4; sl++) { |
| len += sprintf(page + len, PRINTK_HEADER |
| " Sense(hex) %2d-%2d:", |
| (8 * sl), ((8 * sl) + 7)); |
| |
| for (sct = 0; sct < 8; sct++) { |
| len += sprintf(page + len, " %02x", |
| irb->ecw[8 * sl + sct]); |
| } |
| len += sprintf(page + len, "\n"); |
| } |
| } else { |
| len += sprintf(page + len, PRINTK_HEADER |
| " SORRY - NO VALID SENSE AVAILABLE\n"); |
| } |
| printk(KERN_ERR "%s", page); |
| |
| /* dump the Channel Program */ |
| /* print first CCWs (maximum 8) */ |
| act = req->cpaddr; |
| for (last = act; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); |
| end = min(act + 8, last); |
| len = sprintf(page, PRINTK_HEADER " Related CP in req: %p\n", req); |
| while (act <= end) { |
| len += sprintf(page + len, PRINTK_HEADER |
| " CCW %p: %08X %08X DAT:", |
| act, ((int *) act)[0], ((int *) act)[1]); |
| for (count = 0; count < 32 && count < act->count; |
| count += sizeof(int)) |
| len += sprintf(page + len, " %08X", |
| ((int *) (addr_t) act->cda) |
| [(count>>2)]); |
| len += sprintf(page + len, "\n"); |
| act++; |
| } |
| printk(KERN_ERR "%s", page); |
| |
| |
| /* print failing CCW area */ |
| len = 0; |
| if (act < ((struct ccw1 *)(addr_t) irb->scsw.cmd.cpa) - 2) { |
| act = ((struct ccw1 *)(addr_t) irb->scsw.cmd.cpa) - 2; |
| len += sprintf(page + len, PRINTK_HEADER "......\n"); |
| } |
| end = min((struct ccw1 *)(addr_t) irb->scsw.cmd.cpa + 2, last); |
| while (act <= end) { |
| len += sprintf(page + len, PRINTK_HEADER |
| " CCW %p: %08X %08X DAT:", |
| act, ((int *) act)[0], ((int *) act)[1]); |
| for (count = 0; count < 32 && count < act->count; |
| count += sizeof(int)) |
| len += sprintf(page + len, " %08X", |
| ((int *) (addr_t) act->cda) |
| [(count>>2)]); |
| len += sprintf(page + len, "\n"); |
| act++; |
| } |
| |
| /* print last CCWs */ |
| if (act < last - 2) { |
| act = last - 2; |
| len += sprintf(page + len, PRINTK_HEADER "......\n"); |
| } |
| while (act <= last) { |
| len += sprintf(page + len, PRINTK_HEADER |
| " CCW %p: %08X %08X DAT:", |
| act, ((int *) act)[0], ((int *) act)[1]); |
| for (count = 0; count < 32 && count < act->count; |
| count += sizeof(int)) |
| len += sprintf(page + len, " %08X", |
| ((int *) (addr_t) act->cda) |
| [(count>>2)]); |
| len += sprintf(page + len, "\n"); |
| act++; |
| } |
| if (len > 0) |
| printk(KERN_ERR "%s", page); |
| free_page((unsigned long) page); |
| } |
| |
| /* |
| * Initialize block layer request queue. |
| */ |
| static void dasd_fba_setup_blk_queue(struct dasd_block *block) |
| { |
| unsigned int logical_block_size = block->bp_block; |
| struct request_queue *q = block->gdp->queue; |
| unsigned int max_bytes, max_discard_sectors; |
| int max; |
| |
| max = DASD_FBA_MAX_BLOCKS << block->s2b_shift; |
| blk_queue_flag_set(QUEUE_FLAG_NONROT, q); |
| q->limits.max_dev_sectors = max; |
| blk_queue_logical_block_size(q, logical_block_size); |
| blk_queue_max_hw_sectors(q, max); |
| blk_queue_max_segments(q, USHRT_MAX); |
| /* With page sized segments each segment can be translated into one idaw/tidaw */ |
| blk_queue_max_segment_size(q, PAGE_SIZE); |
| blk_queue_segment_boundary(q, PAGE_SIZE - 1); |
| |
| q->limits.discard_granularity = logical_block_size; |
| |
| /* Calculate max_discard_sectors and make it PAGE aligned */ |
| max_bytes = USHRT_MAX * logical_block_size; |
| max_bytes = ALIGN_DOWN(max_bytes, PAGE_SIZE); |
| max_discard_sectors = max_bytes / logical_block_size; |
| |
| blk_queue_max_discard_sectors(q, max_discard_sectors); |
| blk_queue_max_write_zeroes_sectors(q, max_discard_sectors); |
| } |
| |
| static int dasd_fba_pe_handler(struct dasd_device *device, |
| __u8 tbvpm, __u8 fcsecpm) |
| { |
| return dasd_generic_verify_path(device, tbvpm); |
| } |
| |
| static struct dasd_discipline dasd_fba_discipline = { |
| .owner = THIS_MODULE, |
| .name = "FBA ", |
| .ebcname = "FBA ", |
| .check_device = dasd_fba_check_characteristics, |
| .do_analysis = dasd_fba_do_analysis, |
| .pe_handler = dasd_fba_pe_handler, |
| .setup_blk_queue = dasd_fba_setup_blk_queue, |
| .fill_geometry = dasd_fba_fill_geometry, |
| .start_IO = dasd_start_IO, |
| .term_IO = dasd_term_IO, |
| .handle_terminated_request = dasd_fba_handle_terminated_request, |
| .erp_action = dasd_fba_erp_action, |
| .erp_postaction = dasd_fba_erp_postaction, |
| .check_for_device_change = dasd_fba_check_for_device_change, |
| .build_cp = dasd_fba_build_cp, |
| .free_cp = dasd_fba_free_cp, |
| .dump_sense = dasd_fba_dump_sense, |
| .dump_sense_dbf = dasd_fba_dump_sense_dbf, |
| .fill_info = dasd_fba_fill_info, |
| }; |
| |
| static int __init |
| dasd_fba_init(void) |
| { |
| int ret; |
| |
| ASCEBC(dasd_fba_discipline.ebcname, 4); |
| |
| dasd_fba_zero_page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); |
| if (!dasd_fba_zero_page) |
| return -ENOMEM; |
| |
| ret = ccw_driver_register(&dasd_fba_driver); |
| if (!ret) |
| wait_for_device_probe(); |
| |
| return ret; |
| } |
| |
| static void __exit |
| dasd_fba_cleanup(void) |
| { |
| ccw_driver_unregister(&dasd_fba_driver); |
| free_page((unsigned long)dasd_fba_zero_page); |
| } |
| |
| module_init(dasd_fba_init); |
| module_exit(dasd_fba_cleanup); |