16a55d2cdSGreg Kroah-Hartman // SPDX-License-Identifier: GPL-2.0 21da177e4SLinus Torvalds /* 31da177e4SLinus Torvalds * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> 41da177e4SLinus Torvalds * Bugreports.to..: <Linux390@de.ibm.com> 5d41dd122SStefan Haberland * Copyright IBM Corp. 1999, 2009 61da177e4SLinus Torvalds */ 71da177e4SLinus Torvalds 8ca99dab0SStefan Haberland #define KMSG_COMPONENT "dasd-fba" 9fc19f381SStefan Haberland 101da177e4SLinus Torvalds #include <linux/stddef.h> 111da177e4SLinus Torvalds #include <linux/kernel.h> 121da177e4SLinus Torvalds #include <asm/debug.h> 131da177e4SLinus Torvalds 141da177e4SLinus Torvalds #include <linux/slab.h> 151da177e4SLinus Torvalds #include <linux/hdreg.h> /* HDIO_GETGEO */ 161da177e4SLinus Torvalds #include <linux/bio.h> 171da177e4SLinus Torvalds #include <linux/module.h> 181da177e4SLinus Torvalds #include <linux/init.h> 191da177e4SLinus Torvalds 201da177e4SLinus Torvalds #include <asm/idals.h> 211da177e4SLinus Torvalds #include <asm/ebcdic.h> 221da177e4SLinus Torvalds #include <asm/io.h> 231da177e4SLinus Torvalds #include <asm/ccwdev.h> 241da177e4SLinus Torvalds 251da177e4SLinus Torvalds #include "dasd_int.h" 261da177e4SLinus Torvalds #include "dasd_fba.h" 271da177e4SLinus Torvalds 281da177e4SLinus Torvalds #ifdef PRINTK_HEADER 291da177e4SLinus Torvalds #undef PRINTK_HEADER 301da177e4SLinus Torvalds #endif /* PRINTK_HEADER */ 311da177e4SLinus Torvalds #define PRINTK_HEADER "dasd(fba):" 321da177e4SLinus Torvalds 331f1ee9adSHannes Reinecke #define FBA_DEFAULT_RETRIES 32 341f1ee9adSHannes Reinecke 351da177e4SLinus Torvalds #define DASD_FBA_CCW_WRITE 0x41 361da177e4SLinus Torvalds #define DASD_FBA_CCW_READ 0x42 371da177e4SLinus Torvalds #define DASD_FBA_CCW_LOCATE 0x43 381da177e4SLinus Torvalds #define DASD_FBA_CCW_DEFINE_EXTENT 0x63 391da177e4SLinus Torvalds 401da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 411da177e4SLinus Torvalds 421da177e4SLinus Torvalds static struct dasd_discipline dasd_fba_discipline; 431da177e4SLinus Torvalds 441da177e4SLinus Torvalds struct dasd_fba_private { 451da177e4SLinus Torvalds struct dasd_fba_characteristics rdc_data; 461da177e4SLinus Torvalds }; 471da177e4SLinus Torvalds 481da177e4SLinus Torvalds static struct ccw_device_id dasd_fba_ids[] = { 49d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x6310, 0, 0x9336, 0), .driver_info = 0x1}, 50d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3370, 0), .driver_info = 0x2}, 511da177e4SLinus Torvalds { /* end of list */ }, 521da177e4SLinus Torvalds }; 531da177e4SLinus Torvalds 541da177e4SLinus Torvalds MODULE_DEVICE_TABLE(ccw, dasd_fba_ids); 551da177e4SLinus Torvalds 561da177e4SLinus Torvalds static struct ccw_driver dasd_fba_driver; /* see below */ 571da177e4SLinus Torvalds static int 581da177e4SLinus Torvalds dasd_fba_probe(struct ccw_device *cdev) 591da177e4SLinus Torvalds { 6040545573SHorst Hummel return dasd_generic_probe(cdev, &dasd_fba_discipline); 611da177e4SLinus Torvalds } 621da177e4SLinus Torvalds 631da177e4SLinus Torvalds static int 641da177e4SLinus Torvalds dasd_fba_set_online(struct ccw_device *cdev) 651da177e4SLinus Torvalds { 661da177e4SLinus Torvalds return dasd_generic_set_online(cdev, &dasd_fba_discipline); 671da177e4SLinus Torvalds } 681da177e4SLinus Torvalds 691da177e4SLinus Torvalds static struct ccw_driver dasd_fba_driver = { 703bda058bSSebastian Ott .driver = { 711da177e4SLinus Torvalds .name = "dasd-fba", 721da177e4SLinus Torvalds .owner = THIS_MODULE, 733bda058bSSebastian Ott }, 741da177e4SLinus Torvalds .ids = dasd_fba_ids, 751da177e4SLinus Torvalds .probe = dasd_fba_probe, 761da177e4SLinus Torvalds .remove = dasd_generic_remove, 771da177e4SLinus Torvalds .set_offline = dasd_generic_set_offline, 781da177e4SLinus Torvalds .set_online = dasd_fba_set_online, 791da177e4SLinus Torvalds .notify = dasd_generic_notify, 80a4d26c6aSStefan Weinhuber .path_event = dasd_generic_path_event, 81d41dd122SStefan Haberland .freeze = dasd_generic_pm_freeze, 82d41dd122SStefan Haberland .thaw = dasd_generic_restore_device, 83d41dd122SStefan Haberland .restore = dasd_generic_restore_device, 84420f42ecSHeiko Carstens .int_class = IRQIO_DAS, 851da177e4SLinus Torvalds }; 861da177e4SLinus Torvalds 874d284cacSHeiko Carstens static void 881da177e4SLinus Torvalds define_extent(struct ccw1 * ccw, struct DE_fba_data *data, int rw, 891da177e4SLinus Torvalds int blksize, int beg, int nr) 901da177e4SLinus Torvalds { 911da177e4SLinus Torvalds ccw->cmd_code = DASD_FBA_CCW_DEFINE_EXTENT; 921da177e4SLinus Torvalds ccw->flags = 0; 931da177e4SLinus Torvalds ccw->count = 16; 941da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 951da177e4SLinus Torvalds memset(data, 0, sizeof (struct DE_fba_data)); 961da177e4SLinus Torvalds if (rw == WRITE) 971da177e4SLinus Torvalds (data->mask).perm = 0x0; 981da177e4SLinus Torvalds else if (rw == READ) 991da177e4SLinus Torvalds (data->mask).perm = 0x1; 1001da177e4SLinus Torvalds else 1011da177e4SLinus Torvalds data->mask.perm = 0x2; 1021da177e4SLinus Torvalds data->blk_size = blksize; 1031da177e4SLinus Torvalds data->ext_loc = beg; 1041da177e4SLinus Torvalds data->ext_end = nr - 1; 1051da177e4SLinus Torvalds } 1061da177e4SLinus Torvalds 1074d284cacSHeiko Carstens static void 1081da177e4SLinus Torvalds locate_record(struct ccw1 * ccw, struct LO_fba_data *data, int rw, 1091da177e4SLinus Torvalds int block_nr, int block_ct) 1101da177e4SLinus Torvalds { 1111da177e4SLinus Torvalds ccw->cmd_code = DASD_FBA_CCW_LOCATE; 1121da177e4SLinus Torvalds ccw->flags = 0; 1131da177e4SLinus Torvalds ccw->count = 8; 1141da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 1151da177e4SLinus Torvalds memset(data, 0, sizeof (struct LO_fba_data)); 1161da177e4SLinus Torvalds if (rw == WRITE) 1171da177e4SLinus Torvalds data->operation.cmd = 0x5; 1181da177e4SLinus Torvalds else if (rw == READ) 1191da177e4SLinus Torvalds data->operation.cmd = 0x6; 1201da177e4SLinus Torvalds else 1211da177e4SLinus Torvalds data->operation.cmd = 0x8; 1221da177e4SLinus Torvalds data->blk_nr = block_nr; 1231da177e4SLinus Torvalds data->blk_ct = block_ct; 1241da177e4SLinus Torvalds } 1251da177e4SLinus Torvalds 1261da177e4SLinus Torvalds static int 1271da177e4SLinus Torvalds dasd_fba_check_characteristics(struct dasd_device *device) 1281da177e4SLinus Torvalds { 129543691a4SSebastian Ott struct dasd_fba_private *private = device->private; 1301da177e4SLinus Torvalds struct ccw_device *cdev = device->cdev; 131543691a4SSebastian Ott struct dasd_block *block; 132543691a4SSebastian Ott int readonly, rc; 1331da177e4SLinus Torvalds 13492636b15SSebastian Ott if (!private) { 13592636b15SSebastian Ott private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); 13692636b15SSebastian Ott if (!private) { 137fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 138fc19f381SStefan Haberland "Allocating memory for private DASD " 139fc19f381SStefan Haberland "data failed\n"); 1401da177e4SLinus Torvalds return -ENOMEM; 1411da177e4SLinus Torvalds } 142543691a4SSebastian Ott device->private = private; 14392636b15SSebastian Ott } else { 14492636b15SSebastian Ott memset(private, 0, sizeof(*private)); 1451da177e4SLinus Torvalds } 1468e09f215SStefan Weinhuber block = dasd_alloc_block(); 1478e09f215SStefan Weinhuber if (IS_ERR(block)) { 148b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s", "could not allocate " 149b8ed5dd5SStefan Haberland "dasd block structure"); 1507337194fSCornelia Huck device->private = NULL; 1517337194fSCornelia Huck kfree(private); 1528e09f215SStefan Weinhuber return PTR_ERR(block); 1538e09f215SStefan Weinhuber } 1548e09f215SStefan Weinhuber device->block = block; 1558e09f215SStefan Weinhuber block->base = device; 1568e09f215SStefan Weinhuber 1571da177e4SLinus Torvalds /* Read Device Characteristics */ 15868b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_FBA_MAGIC, 15968b781feSStefan Haberland &private->rdc_data, 32); 1601da177e4SLinus Torvalds if (rc) { 161b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, cdev, "Read device " 162b8ed5dd5SStefan Haberland "characteristics returned error %d", rc); 1637337194fSCornelia Huck device->block = NULL; 1647337194fSCornelia Huck dasd_free_block(block); 1657337194fSCornelia Huck device->private = NULL; 1667337194fSCornelia Huck kfree(private); 1671da177e4SLinus Torvalds return rc; 1681da177e4SLinus Torvalds } 1691da177e4SLinus Torvalds 1707c8faa86SStefan Haberland device->default_expires = DASD_EXPIRES; 1711f1ee9adSHannes Reinecke device->default_retries = FBA_DEFAULT_RETRIES; 172c9346151SStefan Haberland dasd_path_set_opm(device, LPM_ANYPATH); 1737c8faa86SStefan Haberland 17433b62a30SStefan Weinhuber readonly = dasd_device_is_ro(device); 17533b62a30SStefan Weinhuber if (readonly) 17633b62a30SStefan Weinhuber set_bit(DASD_FLAG_DEVICE_RO, &device->flags); 17733b62a30SStefan Weinhuber 17828b841b3SJan Höppner /* FBA supports discard, set the according feature bit */ 17928b841b3SJan Höppner dasd_set_feature(cdev, DASD_FEATURE_DISCARD, 1); 18028b841b3SJan Höppner 181fc19f381SStefan Haberland dev_info(&device->cdev->dev, 182fc19f381SStefan Haberland "New FBA DASD %04X/%02X (CU %04X/%02X) with %d MB " 18333b62a30SStefan Weinhuber "and %d B/blk%s\n", 1841da177e4SLinus Torvalds cdev->id.dev_type, 1851da177e4SLinus Torvalds cdev->id.dev_model, 1861da177e4SLinus Torvalds cdev->id.cu_type, 1871da177e4SLinus Torvalds cdev->id.cu_model, 1881da177e4SLinus Torvalds ((private->rdc_data.blk_bdsa * 1891da177e4SLinus Torvalds (private->rdc_data.blk_size >> 9)) >> 11), 19033b62a30SStefan Weinhuber private->rdc_data.blk_size, 19133b62a30SStefan Weinhuber readonly ? ", read-only device" : ""); 1921da177e4SLinus Torvalds return 0; 1931da177e4SLinus Torvalds } 1941da177e4SLinus Torvalds 1958e09f215SStefan Weinhuber static int dasd_fba_do_analysis(struct dasd_block *block) 1961da177e4SLinus Torvalds { 197543691a4SSebastian Ott struct dasd_fba_private *private = block->base->private; 1981da177e4SLinus Torvalds int sb, rc; 1991da177e4SLinus Torvalds 2001da177e4SLinus Torvalds rc = dasd_check_blocksize(private->rdc_data.blk_size); 2011da177e4SLinus Torvalds if (rc) { 202fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, block->base, "unknown blocksize %d", 2031da177e4SLinus Torvalds private->rdc_data.blk_size); 2041da177e4SLinus Torvalds return rc; 2051da177e4SLinus Torvalds } 2068e09f215SStefan Weinhuber block->blocks = private->rdc_data.blk_bdsa; 2078e09f215SStefan Weinhuber block->bp_block = private->rdc_data.blk_size; 2088e09f215SStefan Weinhuber block->s2b_shift = 0; /* bits to shift 512 to get a block */ 2091da177e4SLinus Torvalds for (sb = 512; sb < private->rdc_data.blk_size; sb = sb << 1) 2108e09f215SStefan Weinhuber block->s2b_shift++; 2111da177e4SLinus Torvalds return 0; 2121da177e4SLinus Torvalds } 2131da177e4SLinus Torvalds 2148e09f215SStefan Weinhuber static int dasd_fba_fill_geometry(struct dasd_block *block, 2158e09f215SStefan Weinhuber struct hd_geometry *geo) 2161da177e4SLinus Torvalds { 2178e09f215SStefan Weinhuber if (dasd_check_blocksize(block->bp_block) != 0) 2181da177e4SLinus Torvalds return -EINVAL; 2198e09f215SStefan Weinhuber geo->cylinders = (block->blocks << block->s2b_shift) >> 10; 2201da177e4SLinus Torvalds geo->heads = 16; 2218e09f215SStefan Weinhuber geo->sectors = 128 >> block->s2b_shift; 2221da177e4SLinus Torvalds return 0; 2231da177e4SLinus Torvalds } 2241da177e4SLinus Torvalds 2251da177e4SLinus Torvalds static dasd_erp_fn_t 2261da177e4SLinus Torvalds dasd_fba_erp_action(struct dasd_ccw_req * cqr) 2271da177e4SLinus Torvalds { 2281da177e4SLinus Torvalds return dasd_default_erp_action; 2291da177e4SLinus Torvalds } 2301da177e4SLinus Torvalds 2311da177e4SLinus Torvalds static dasd_erp_fn_t 2321da177e4SLinus Torvalds dasd_fba_erp_postaction(struct dasd_ccw_req * cqr) 2331da177e4SLinus Torvalds { 2341da177e4SLinus Torvalds if (cqr->function == dasd_default_erp_action) 2351da177e4SLinus Torvalds return dasd_default_erp_postaction; 2361da177e4SLinus Torvalds 237fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, cqr->startdev, "unknown ERP action %p", 2381da177e4SLinus Torvalds cqr->function); 2391da177e4SLinus Torvalds return NULL; 2401da177e4SLinus Torvalds } 2411da177e4SLinus Torvalds 2425a27e60dSStefan Weinhuber static void dasd_fba_check_for_device_change(struct dasd_device *device, 2435a27e60dSStefan Weinhuber struct dasd_ccw_req *cqr, 2448e09f215SStefan Weinhuber struct irb *irb) 2458e09f215SStefan Weinhuber { 2468e09f215SStefan Weinhuber char mask; 2478e09f215SStefan Weinhuber 2488e09f215SStefan Weinhuber /* first of all check for state change pending interrupt */ 2498e09f215SStefan Weinhuber mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 2505a27e60dSStefan Weinhuber if ((irb->scsw.cmd.dstat & mask) == mask) 2518e09f215SStefan Weinhuber dasd_generic_handle_state_change(device); 2528e09f215SStefan Weinhuber }; 2538e09f215SStefan Weinhuber 25428b841b3SJan Höppner 25528b841b3SJan Höppner /* 25628b841b3SJan Höppner * Builds a CCW with no data payload 25728b841b3SJan Höppner */ 25828b841b3SJan Höppner static void ccw_write_no_data(struct ccw1 *ccw) 25928b841b3SJan Höppner { 26028b841b3SJan Höppner ccw->cmd_code = DASD_FBA_CCW_WRITE; 26128b841b3SJan Höppner ccw->flags |= CCW_FLAG_SLI; 26228b841b3SJan Höppner ccw->count = 0; 26328b841b3SJan Höppner } 26428b841b3SJan Höppner 26528b841b3SJan Höppner /* 26628b841b3SJan Höppner * Builds a CCW that writes only zeroes. 26728b841b3SJan Höppner */ 26828b841b3SJan Höppner static void ccw_write_zero(struct ccw1 *ccw, int count) 26928b841b3SJan Höppner { 27028b841b3SJan Höppner ccw->cmd_code = DASD_FBA_CCW_WRITE; 27128b841b3SJan Höppner ccw->flags |= CCW_FLAG_SLI; 27228b841b3SJan Höppner ccw->count = count; 27328b841b3SJan Höppner ccw->cda = (__u32) (addr_t) page_to_phys(ZERO_PAGE(0)); 27428b841b3SJan Höppner } 27528b841b3SJan Höppner 27628b841b3SJan Höppner /* 27728b841b3SJan Höppner * Helper function to count the amount of necessary CCWs within a given range 27828b841b3SJan Höppner * with 4k alignment and command chaining in mind. 27928b841b3SJan Höppner */ 28028b841b3SJan Höppner static int count_ccws(sector_t first_rec, sector_t last_rec, 28128b841b3SJan Höppner unsigned int blocks_per_page) 28228b841b3SJan Höppner { 28328b841b3SJan Höppner sector_t wz_stop = 0, d_stop = 0; 28428b841b3SJan Höppner int cur_pos = 0; 28528b841b3SJan Höppner int count = 0; 28628b841b3SJan Höppner 28728b841b3SJan Höppner if (first_rec % blocks_per_page != 0) { 28828b841b3SJan Höppner wz_stop = first_rec + blocks_per_page - 28928b841b3SJan Höppner (first_rec % blocks_per_page) - 1; 29028b841b3SJan Höppner if (wz_stop > last_rec) 29128b841b3SJan Höppner wz_stop = last_rec; 29228b841b3SJan Höppner cur_pos = wz_stop - first_rec + 1; 29328b841b3SJan Höppner count++; 29428b841b3SJan Höppner } 29528b841b3SJan Höppner 29628b841b3SJan Höppner if (last_rec - (first_rec + cur_pos) + 1 >= blocks_per_page) { 29728b841b3SJan Höppner if ((last_rec - blocks_per_page + 1) % blocks_per_page != 0) 29828b841b3SJan Höppner d_stop = last_rec - ((last_rec - blocks_per_page + 1) % 29928b841b3SJan Höppner blocks_per_page); 30028b841b3SJan Höppner else 30128b841b3SJan Höppner d_stop = last_rec; 30228b841b3SJan Höppner 30328b841b3SJan Höppner cur_pos += d_stop - (first_rec + cur_pos) + 1; 30428b841b3SJan Höppner count++; 30528b841b3SJan Höppner } 30628b841b3SJan Höppner 30728b841b3SJan Höppner if (cur_pos == 0 || first_rec + cur_pos - 1 < last_rec) 30828b841b3SJan Höppner count++; 30928b841b3SJan Höppner 31028b841b3SJan Höppner return count; 31128b841b3SJan Höppner } 31228b841b3SJan Höppner 31328b841b3SJan Höppner /* 31428b841b3SJan Höppner * This function builds a CCW request for block layer discard requests. 31528b841b3SJan Höppner * Each page in the z/VM hypervisor that represents certain records of an FBA 31628b841b3SJan Höppner * device will be padded with zeros. This is a special behaviour of the WRITE 31728b841b3SJan Höppner * command which is triggered when no data payload is added to the CCW. 31828b841b3SJan Höppner * 31928b841b3SJan Höppner * Note: Due to issues in some z/VM versions, we can't fully utilise this 32028b841b3SJan Höppner * special behaviour. We have to keep a 4k (or 8 block) alignment in mind to 32128b841b3SJan Höppner * work around those issues and write actual zeroes to the unaligned parts in 32228b841b3SJan Höppner * the request. This workaround might be removed in the future. 32328b841b3SJan Höppner */ 32428b841b3SJan Höppner static struct dasd_ccw_req *dasd_fba_build_cp_discard( 32528b841b3SJan Höppner struct dasd_device *memdev, 32628b841b3SJan Höppner struct dasd_block *block, 32728b841b3SJan Höppner struct request *req) 32828b841b3SJan Höppner { 32928b841b3SJan Höppner struct LO_fba_data *LO_data; 33028b841b3SJan Höppner struct dasd_ccw_req *cqr; 33128b841b3SJan Höppner struct ccw1 *ccw; 33228b841b3SJan Höppner 33328b841b3SJan Höppner sector_t wz_stop = 0, d_stop = 0; 33428b841b3SJan Höppner sector_t first_rec, last_rec; 33528b841b3SJan Höppner 33628b841b3SJan Höppner unsigned int blksize = block->bp_block; 33728b841b3SJan Höppner unsigned int blocks_per_page; 33828b841b3SJan Höppner int wz_count = 0; 33928b841b3SJan Höppner int d_count = 0; 34028b841b3SJan Höppner int cur_pos = 0; /* Current position within the extent */ 34128b841b3SJan Höppner int count = 0; 34228b841b3SJan Höppner int cplength; 34328b841b3SJan Höppner int datasize; 34428b841b3SJan Höppner int nr_ccws; 34528b841b3SJan Höppner 34628b841b3SJan Höppner first_rec = blk_rq_pos(req) >> block->s2b_shift; 34728b841b3SJan Höppner last_rec = 34828b841b3SJan Höppner (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 34928b841b3SJan Höppner count = last_rec - first_rec + 1; 35028b841b3SJan Höppner 35128b841b3SJan Höppner blocks_per_page = BLOCKS_PER_PAGE(blksize); 35228b841b3SJan Höppner nr_ccws = count_ccws(first_rec, last_rec, blocks_per_page); 35328b841b3SJan Höppner 35428b841b3SJan Höppner /* define extent + nr_ccws * locate record + nr_ccws * single CCW */ 35528b841b3SJan Höppner cplength = 1 + 2 * nr_ccws; 35628b841b3SJan Höppner datasize = sizeof(struct DE_fba_data) + 35728b841b3SJan Höppner nr_ccws * (sizeof(struct LO_fba_data) + sizeof(struct ccw1)); 35828b841b3SJan Höppner 359c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_FBA_MAGIC, cplength, datasize, memdev, 360c5205f2fSSebastian Ott blk_mq_rq_to_pdu(req)); 36128b841b3SJan Höppner if (IS_ERR(cqr)) 36228b841b3SJan Höppner return cqr; 36328b841b3SJan Höppner 36428b841b3SJan Höppner ccw = cqr->cpaddr; 36528b841b3SJan Höppner 36628b841b3SJan Höppner define_extent(ccw++, cqr->data, WRITE, blksize, first_rec, count); 36728b841b3SJan Höppner LO_data = cqr->data + sizeof(struct DE_fba_data); 36828b841b3SJan Höppner 36928b841b3SJan Höppner /* First part is not aligned. Calculate range to write zeroes. */ 37028b841b3SJan Höppner if (first_rec % blocks_per_page != 0) { 37128b841b3SJan Höppner wz_stop = first_rec + blocks_per_page - 37228b841b3SJan Höppner (first_rec % blocks_per_page) - 1; 37328b841b3SJan Höppner if (wz_stop > last_rec) 37428b841b3SJan Höppner wz_stop = last_rec; 37528b841b3SJan Höppner wz_count = wz_stop - first_rec + 1; 37628b841b3SJan Höppner 37728b841b3SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 37828b841b3SJan Höppner locate_record(ccw++, LO_data++, WRITE, cur_pos, wz_count); 37928b841b3SJan Höppner 38028b841b3SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 38128b841b3SJan Höppner ccw_write_zero(ccw++, wz_count * blksize); 38228b841b3SJan Höppner 38328b841b3SJan Höppner cur_pos = wz_count; 38428b841b3SJan Höppner } 38528b841b3SJan Höppner 38628b841b3SJan Höppner /* We can do proper discard when we've got at least blocks_per_page blocks. */ 38728b841b3SJan Höppner if (last_rec - (first_rec + cur_pos) + 1 >= blocks_per_page) { 38828b841b3SJan Höppner /* is last record at page boundary? */ 38928b841b3SJan Höppner if ((last_rec - blocks_per_page + 1) % blocks_per_page != 0) 39028b841b3SJan Höppner d_stop = last_rec - ((last_rec - blocks_per_page + 1) % 39128b841b3SJan Höppner blocks_per_page); 39228b841b3SJan Höppner else 39328b841b3SJan Höppner d_stop = last_rec; 39428b841b3SJan Höppner 39528b841b3SJan Höppner d_count = d_stop - (first_rec + cur_pos) + 1; 39628b841b3SJan Höppner 39728b841b3SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 39828b841b3SJan Höppner locate_record(ccw++, LO_data++, WRITE, cur_pos, d_count); 39928b841b3SJan Höppner 40028b841b3SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 40128b841b3SJan Höppner ccw_write_no_data(ccw++); 40228b841b3SJan Höppner 40328b841b3SJan Höppner cur_pos += d_count; 40428b841b3SJan Höppner } 40528b841b3SJan Höppner 40628b841b3SJan Höppner /* We might still have some bits left which need to be zeroed. */ 40728b841b3SJan Höppner if (cur_pos == 0 || first_rec + cur_pos - 1 < last_rec) { 40828b841b3SJan Höppner if (d_stop != 0) 40928b841b3SJan Höppner wz_count = last_rec - d_stop; 41028b841b3SJan Höppner else if (wz_stop != 0) 41128b841b3SJan Höppner wz_count = last_rec - wz_stop; 41228b841b3SJan Höppner else 41328b841b3SJan Höppner wz_count = count; 41428b841b3SJan Höppner 41528b841b3SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 41628b841b3SJan Höppner locate_record(ccw++, LO_data++, WRITE, cur_pos, wz_count); 41728b841b3SJan Höppner 41828b841b3SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 41928b841b3SJan Höppner ccw_write_zero(ccw++, wz_count * blksize); 42028b841b3SJan Höppner } 42128b841b3SJan Höppner 42228b841b3SJan Höppner if (blk_noretry_request(req) || 42328b841b3SJan Höppner block->base->features & DASD_FEATURE_FAILFAST) 42428b841b3SJan Höppner set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 42528b841b3SJan Höppner 42628b841b3SJan Höppner cqr->startdev = memdev; 42728b841b3SJan Höppner cqr->memdev = memdev; 42828b841b3SJan Höppner cqr->block = block; 42928b841b3SJan Höppner cqr->expires = memdev->default_expires * HZ; /* default 5 minutes */ 43028b841b3SJan Höppner cqr->retries = memdev->default_retries; 43128b841b3SJan Höppner cqr->buildclk = get_tod_clock(); 43228b841b3SJan Höppner cqr->status = DASD_CQR_FILLED; 43328b841b3SJan Höppner 43428b841b3SJan Höppner return cqr; 43528b841b3SJan Höppner } 43628b841b3SJan Höppner 43728b841b3SJan Höppner static struct dasd_ccw_req *dasd_fba_build_cp_regular( 43828b841b3SJan Höppner struct dasd_device *memdev, 4398e09f215SStefan Weinhuber struct dasd_block *block, 4408e09f215SStefan Weinhuber struct request *req) 4411da177e4SLinus Torvalds { 442543691a4SSebastian Ott struct dasd_fba_private *private = block->base->private; 4431da177e4SLinus Torvalds unsigned long *idaws; 4441da177e4SLinus Torvalds struct LO_fba_data *LO_data; 4451da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 4461da177e4SLinus Torvalds struct ccw1 *ccw; 4475705f702SNeilBrown struct req_iterator iter; 4487988613bSKent Overstreet struct bio_vec bv; 4491da177e4SLinus Torvalds char *dst; 4501da177e4SLinus Torvalds int count, cidaw, cplength, datasize; 4511da177e4SLinus Torvalds sector_t recid, first_rec, last_rec; 4521da177e4SLinus Torvalds unsigned int blksize, off; 4531da177e4SLinus Torvalds unsigned char cmd; 4541da177e4SLinus Torvalds 4551da177e4SLinus Torvalds if (rq_data_dir(req) == READ) { 4561da177e4SLinus Torvalds cmd = DASD_FBA_CCW_READ; 4571da177e4SLinus Torvalds } else if (rq_data_dir(req) == WRITE) { 4581da177e4SLinus Torvalds cmd = DASD_FBA_CCW_WRITE; 4591da177e4SLinus Torvalds } else 4601da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 4618e09f215SStefan Weinhuber blksize = block->bp_block; 4621da177e4SLinus Torvalds /* Calculate record id of first and last block. */ 46383096ebfSTejun Heo first_rec = blk_rq_pos(req) >> block->s2b_shift; 46483096ebfSTejun Heo last_rec = 46583096ebfSTejun Heo (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 4661da177e4SLinus Torvalds /* Check struct bio and count the number of blocks for the request. */ 4671da177e4SLinus Torvalds count = 0; 4681da177e4SLinus Torvalds cidaw = 0; 4695705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 4707988613bSKent Overstreet if (bv.bv_len & (blksize - 1)) 4711da177e4SLinus Torvalds /* Fba can only do full blocks. */ 4721da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 4737988613bSKent Overstreet count += bv.bv_len >> (block->s2b_shift + 9); 4747988613bSKent Overstreet if (idal_is_needed (page_address(bv.bv_page), bv.bv_len)) 4757988613bSKent Overstreet cidaw += bv.bv_len / blksize; 4761da177e4SLinus Torvalds } 4771da177e4SLinus Torvalds /* Paranoia. */ 4781da177e4SLinus Torvalds if (count != last_rec - first_rec + 1) 4791da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 4801da177e4SLinus Torvalds /* 1x define extent + 1x locate record + number of blocks */ 4811da177e4SLinus Torvalds cplength = 2 + count; 4821da177e4SLinus Torvalds /* 1x define extent + 1x locate record */ 4831da177e4SLinus Torvalds datasize = sizeof(struct DE_fba_data) + sizeof(struct LO_fba_data) + 4841da177e4SLinus Torvalds cidaw * sizeof(unsigned long); 4851da177e4SLinus Torvalds /* 4861da177e4SLinus Torvalds * Find out number of additional locate record ccws if the device 4871da177e4SLinus Torvalds * can't do data chaining. 4881da177e4SLinus Torvalds */ 4891da177e4SLinus Torvalds if (private->rdc_data.mode.bits.data_chain == 0) { 4901da177e4SLinus Torvalds cplength += count - 1; 4911da177e4SLinus Torvalds datasize += (count - 1)*sizeof(struct LO_fba_data); 4921da177e4SLinus Torvalds } 4931da177e4SLinus Torvalds /* Allocate the ccw request. */ 494c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_FBA_MAGIC, cplength, datasize, memdev, 495c5205f2fSSebastian Ott blk_mq_rq_to_pdu(req)); 4961da177e4SLinus Torvalds if (IS_ERR(cqr)) 4971da177e4SLinus Torvalds return cqr; 4981da177e4SLinus Torvalds ccw = cqr->cpaddr; 4991da177e4SLinus Torvalds /* First ccw is define extent. */ 5001da177e4SLinus Torvalds define_extent(ccw++, cqr->data, rq_data_dir(req), 50183096ebfSTejun Heo block->bp_block, blk_rq_pos(req), blk_rq_sectors(req)); 5021da177e4SLinus Torvalds /* Build locate_record + read/write ccws. */ 5031da177e4SLinus Torvalds idaws = (unsigned long *) (cqr->data + sizeof(struct DE_fba_data)); 5041da177e4SLinus Torvalds LO_data = (struct LO_fba_data *) (idaws + cidaw); 5051da177e4SLinus Torvalds /* Locate record for all blocks for smart devices. */ 5061da177e4SLinus Torvalds if (private->rdc_data.mode.bits.data_chain != 0) { 5071da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 5081da177e4SLinus Torvalds locate_record(ccw++, LO_data++, rq_data_dir(req), 0, count); 5091da177e4SLinus Torvalds } 5101da177e4SLinus Torvalds recid = first_rec; 5115705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 5127988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 5131da177e4SLinus Torvalds if (dasd_page_cache) { 5141da177e4SLinus Torvalds char *copy = kmem_cache_alloc(dasd_page_cache, 515441e143eSChristoph Lameter GFP_DMA | __GFP_NOWARN); 5161da177e4SLinus Torvalds if (copy && rq_data_dir(req) == WRITE) 5177988613bSKent Overstreet memcpy(copy + bv.bv_offset, dst, bv.bv_len); 5181da177e4SLinus Torvalds if (copy) 5197988613bSKent Overstreet dst = copy + bv.bv_offset; 5201da177e4SLinus Torvalds } 5217988613bSKent Overstreet for (off = 0; off < bv.bv_len; off += blksize) { 5221da177e4SLinus Torvalds /* Locate record for stupid devices. */ 5231da177e4SLinus Torvalds if (private->rdc_data.mode.bits.data_chain == 0) { 5241da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 5251da177e4SLinus Torvalds locate_record(ccw, LO_data++, 5261da177e4SLinus Torvalds rq_data_dir(req), 5271da177e4SLinus Torvalds recid - first_rec, 1); 5281da177e4SLinus Torvalds ccw->flags = CCW_FLAG_CC; 5291da177e4SLinus Torvalds ccw++; 5301da177e4SLinus Torvalds } else { 5311da177e4SLinus Torvalds if (recid > first_rec) 5321da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_DC; 5331da177e4SLinus Torvalds else 5341da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 5351da177e4SLinus Torvalds } 5361da177e4SLinus Torvalds ccw->cmd_code = cmd; 5378e09f215SStefan Weinhuber ccw->count = block->bp_block; 5381da177e4SLinus Torvalds if (idal_is_needed(dst, blksize)) { 5391da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) idaws; 5401da177e4SLinus Torvalds ccw->flags = CCW_FLAG_IDA; 5411da177e4SLinus Torvalds idaws = idal_create_words(idaws, dst, blksize); 5421da177e4SLinus Torvalds } else { 5431da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) dst; 5441da177e4SLinus Torvalds ccw->flags = 0; 5451da177e4SLinus Torvalds } 5461da177e4SLinus Torvalds ccw++; 5471da177e4SLinus Torvalds dst += blksize; 5481da177e4SLinus Torvalds recid++; 5491da177e4SLinus Torvalds } 5501da177e4SLinus Torvalds } 55113de227bSHolger Smolinski if (blk_noretry_request(req) || 55213de227bSHolger Smolinski block->base->features & DASD_FEATURE_FAILFAST) 5531c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 5548e09f215SStefan Weinhuber cqr->startdev = memdev; 5558e09f215SStefan Weinhuber cqr->memdev = memdev; 5568e09f215SStefan Weinhuber cqr->block = block; 5577c8faa86SStefan Haberland cqr->expires = memdev->default_expires * HZ; /* default 5 minutes */ 5581f1ee9adSHannes Reinecke cqr->retries = memdev->default_retries; 5591aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 5601da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 5611da177e4SLinus Torvalds return cqr; 5621da177e4SLinus Torvalds } 5631da177e4SLinus Torvalds 56428b841b3SJan Höppner static struct dasd_ccw_req *dasd_fba_build_cp(struct dasd_device *memdev, 56528b841b3SJan Höppner struct dasd_block *block, 56628b841b3SJan Höppner struct request *req) 56728b841b3SJan Höppner { 56828b841b3SJan Höppner if (req_op(req) == REQ_OP_DISCARD || req_op(req) == REQ_OP_WRITE_ZEROES) 56928b841b3SJan Höppner return dasd_fba_build_cp_discard(memdev, block, req); 57028b841b3SJan Höppner else 57128b841b3SJan Höppner return dasd_fba_build_cp_regular(memdev, block, req); 57228b841b3SJan Höppner } 57328b841b3SJan Höppner 5741da177e4SLinus Torvalds static int 5751da177e4SLinus Torvalds dasd_fba_free_cp(struct dasd_ccw_req *cqr, struct request *req) 5761da177e4SLinus Torvalds { 577543691a4SSebastian Ott struct dasd_fba_private *private = cqr->block->base->private; 5781da177e4SLinus Torvalds struct ccw1 *ccw; 5795705f702SNeilBrown struct req_iterator iter; 5807988613bSKent Overstreet struct bio_vec bv; 5811da177e4SLinus Torvalds char *dst, *cda; 5821da177e4SLinus Torvalds unsigned int blksize, off; 5835705f702SNeilBrown int status; 5841da177e4SLinus Torvalds 5851da177e4SLinus Torvalds if (!dasd_page_cache) 5861da177e4SLinus Torvalds goto out; 5878e09f215SStefan Weinhuber blksize = cqr->block->bp_block; 5881da177e4SLinus Torvalds ccw = cqr->cpaddr; 5891da177e4SLinus Torvalds /* Skip over define extent & locate record. */ 5901da177e4SLinus Torvalds ccw++; 5911da177e4SLinus Torvalds if (private->rdc_data.mode.bits.data_chain != 0) 5921da177e4SLinus Torvalds ccw++; 5935705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 5947988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 5957988613bSKent Overstreet for (off = 0; off < bv.bv_len; off += blksize) { 5961da177e4SLinus Torvalds /* Skip locate record. */ 5971da177e4SLinus Torvalds if (private->rdc_data.mode.bits.data_chain == 0) 5981da177e4SLinus Torvalds ccw++; 5991da177e4SLinus Torvalds if (dst) { 6001da177e4SLinus Torvalds if (ccw->flags & CCW_FLAG_IDA) 6011da177e4SLinus Torvalds cda = *((char **)((addr_t) ccw->cda)); 6021da177e4SLinus Torvalds else 6031da177e4SLinus Torvalds cda = (char *)((addr_t) ccw->cda); 6041da177e4SLinus Torvalds if (dst != cda) { 6051da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 6067988613bSKent Overstreet memcpy(dst, cda, bv.bv_len); 6071da177e4SLinus Torvalds kmem_cache_free(dasd_page_cache, 6081da177e4SLinus Torvalds (void *)((addr_t)cda & PAGE_MASK)); 6091da177e4SLinus Torvalds } 6101da177e4SLinus Torvalds dst = NULL; 6111da177e4SLinus Torvalds } 6121da177e4SLinus Torvalds ccw++; 6131da177e4SLinus Torvalds } 6141da177e4SLinus Torvalds } 6151da177e4SLinus Torvalds out: 6161da177e4SLinus Torvalds status = cqr->status == DASD_CQR_DONE; 6178e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 6181da177e4SLinus Torvalds return status; 6191da177e4SLinus Torvalds } 6201da177e4SLinus Torvalds 6218e09f215SStefan Weinhuber static void dasd_fba_handle_terminated_request(struct dasd_ccw_req *cqr) 6228e09f215SStefan Weinhuber { 623a2ace466SHannes Reinecke if (cqr->retries < 0) 624a2ace466SHannes Reinecke cqr->status = DASD_CQR_FAILED; 625a2ace466SHannes Reinecke else 6268e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 6278e09f215SStefan Weinhuber }; 6288e09f215SStefan Weinhuber 6291da177e4SLinus Torvalds static int 6301da177e4SLinus Torvalds dasd_fba_fill_info(struct dasd_device * device, 6311da177e4SLinus Torvalds struct dasd_information2_t * info) 6321da177e4SLinus Torvalds { 633543691a4SSebastian Ott struct dasd_fba_private *private = device->private; 634543691a4SSebastian Ott 6351da177e4SLinus Torvalds info->label_block = 1; 6361da177e4SLinus Torvalds info->FBA_layout = 1; 6371da177e4SLinus Torvalds info->format = DASD_FORMAT_LDL; 638543691a4SSebastian Ott info->characteristics_size = sizeof(private->rdc_data); 639543691a4SSebastian Ott memcpy(info->characteristics, &private->rdc_data, 640543691a4SSebastian Ott sizeof(private->rdc_data)); 6411da177e4SLinus Torvalds info->confdata_size = 0; 6421da177e4SLinus Torvalds return 0; 6431da177e4SLinus Torvalds } 6441da177e4SLinus Torvalds 6451da177e4SLinus Torvalds static void 646aeec92caSStefan Haberland dasd_fba_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 647aeec92caSStefan Haberland char *reason) 648fc19f381SStefan Haberland { 649aeec92caSStefan Haberland u64 *sense; 650aeec92caSStefan Haberland 651aeec92caSStefan Haberland sense = (u64 *) dasd_get_sense(irb); 652aeec92caSStefan Haberland if (sense) { 653fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_EMERG, device, 654aeec92caSStefan Haberland "%s: %s %02x%02x%02x %016llx %016llx %016llx " 655aeec92caSStefan Haberland "%016llx", reason, 656aeec92caSStefan Haberland scsw_is_tm(&irb->scsw) ? "t" : "c", 657aeec92caSStefan Haberland scsw_cc(&irb->scsw), scsw_cstat(&irb->scsw), 658aeec92caSStefan Haberland scsw_dstat(&irb->scsw), sense[0], sense[1], 659aeec92caSStefan Haberland sense[2], sense[3]); 660fc19f381SStefan Haberland } else { 661fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_EMERG, device, "%s", 662fc19f381SStefan Haberland "SORRY - NO VALID SENSE AVAILABLE\n"); 663fc19f381SStefan Haberland } 664fc19f381SStefan Haberland } 665fc19f381SStefan Haberland 666fc19f381SStefan Haberland 667fc19f381SStefan Haberland static void 6681da177e4SLinus Torvalds dasd_fba_dump_sense(struct dasd_device *device, struct dasd_ccw_req * req, 6691da177e4SLinus Torvalds struct irb *irb) 6701da177e4SLinus Torvalds { 6711da177e4SLinus Torvalds char *page; 6721da177e4SLinus Torvalds struct ccw1 *act, *end, *last; 6731da177e4SLinus Torvalds int len, sl, sct, count; 6741da177e4SLinus Torvalds 6751da177e4SLinus Torvalds page = (char *) get_zeroed_page(GFP_ATOMIC); 6761da177e4SLinus Torvalds if (page == NULL) { 677fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 6781da177e4SLinus Torvalds "No memory to dump sense data"); 6791da177e4SLinus Torvalds return; 6801da177e4SLinus Torvalds } 681773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 6821da177e4SLinus Torvalds " I/O status report for device %s:\n", 6832a0217d5SKay Sievers dev_name(&device->cdev->dev)); 684773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 6851da177e4SLinus Torvalds " in req: %p CS: 0x%02X DS: 0x%02X\n", req, 68623d805b6SPeter Oberparleiter irb->scsw.cmd.cstat, irb->scsw.cmd.dstat); 687773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 6881da177e4SLinus Torvalds " device %s: Failing CCW: %p\n", 6892a0217d5SKay Sievers dev_name(&device->cdev->dev), 69023d805b6SPeter Oberparleiter (void *) (addr_t) irb->scsw.cmd.cpa); 6911da177e4SLinus Torvalds if (irb->esw.esw0.erw.cons) { 6921da177e4SLinus Torvalds for (sl = 0; sl < 4; sl++) { 693773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 6941da177e4SLinus Torvalds " Sense(hex) %2d-%2d:", 6951da177e4SLinus Torvalds (8 * sl), ((8 * sl) + 7)); 6961da177e4SLinus Torvalds 6971da177e4SLinus Torvalds for (sct = 0; sct < 8; sct++) { 6981da177e4SLinus Torvalds len += sprintf(page + len, " %02x", 6991da177e4SLinus Torvalds irb->ecw[8 * sl + sct]); 7001da177e4SLinus Torvalds } 7011da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 7021da177e4SLinus Torvalds } 7031da177e4SLinus Torvalds } else { 704773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 7051da177e4SLinus Torvalds " SORRY - NO VALID SENSE AVAILABLE\n"); 7061da177e4SLinus Torvalds } 707fc19f381SStefan Haberland printk(KERN_ERR "%s", page); 7081da177e4SLinus Torvalds 7091da177e4SLinus Torvalds /* dump the Channel Program */ 7101da177e4SLinus Torvalds /* print first CCWs (maximum 8) */ 7111da177e4SLinus Torvalds act = req->cpaddr; 7121da177e4SLinus Torvalds for (last = act; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 7131da177e4SLinus Torvalds end = min(act + 8, last); 714773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER " Related CP in req: %p\n", req); 7151da177e4SLinus Torvalds while (act <= end) { 716773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 7171da177e4SLinus Torvalds " CCW %p: %08X %08X DAT:", 7181da177e4SLinus Torvalds act, ((int *) act)[0], ((int *) act)[1]); 7191da177e4SLinus Torvalds for (count = 0; count < 32 && count < act->count; 7201da177e4SLinus Torvalds count += sizeof(int)) 7211da177e4SLinus Torvalds len += sprintf(page + len, " %08X", 7221da177e4SLinus Torvalds ((int *) (addr_t) act->cda) 7231da177e4SLinus Torvalds [(count>>2)]); 7241da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 7251da177e4SLinus Torvalds act++; 7261da177e4SLinus Torvalds } 727fc19f381SStefan Haberland printk(KERN_ERR "%s", page); 7281da177e4SLinus Torvalds 7291da177e4SLinus Torvalds 7301da177e4SLinus Torvalds /* print failing CCW area */ 7311da177e4SLinus Torvalds len = 0; 73223d805b6SPeter Oberparleiter if (act < ((struct ccw1 *)(addr_t) irb->scsw.cmd.cpa) - 2) { 73323d805b6SPeter Oberparleiter act = ((struct ccw1 *)(addr_t) irb->scsw.cmd.cpa) - 2; 734773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER "......\n"); 7351da177e4SLinus Torvalds } 73623d805b6SPeter Oberparleiter end = min((struct ccw1 *)(addr_t) irb->scsw.cmd.cpa + 2, last); 7371da177e4SLinus Torvalds while (act <= end) { 738773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 7391da177e4SLinus Torvalds " CCW %p: %08X %08X DAT:", 7401da177e4SLinus Torvalds act, ((int *) act)[0], ((int *) act)[1]); 7411da177e4SLinus Torvalds for (count = 0; count < 32 && count < act->count; 7421da177e4SLinus Torvalds count += sizeof(int)) 7431da177e4SLinus Torvalds len += sprintf(page + len, " %08X", 7441da177e4SLinus Torvalds ((int *) (addr_t) act->cda) 7451da177e4SLinus Torvalds [(count>>2)]); 7461da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 7471da177e4SLinus Torvalds act++; 7481da177e4SLinus Torvalds } 7491da177e4SLinus Torvalds 7501da177e4SLinus Torvalds /* print last CCWs */ 7511da177e4SLinus Torvalds if (act < last - 2) { 7521da177e4SLinus Torvalds act = last - 2; 753773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER "......\n"); 7541da177e4SLinus Torvalds } 7551da177e4SLinus Torvalds while (act <= last) { 756773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 7571da177e4SLinus Torvalds " CCW %p: %08X %08X DAT:", 7581da177e4SLinus Torvalds act, ((int *) act)[0], ((int *) act)[1]); 7591da177e4SLinus Torvalds for (count = 0; count < 32 && count < act->count; 7601da177e4SLinus Torvalds count += sizeof(int)) 7611da177e4SLinus Torvalds len += sprintf(page + len, " %08X", 7621da177e4SLinus Torvalds ((int *) (addr_t) act->cda) 7631da177e4SLinus Torvalds [(count>>2)]); 7641da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 7651da177e4SLinus Torvalds act++; 7661da177e4SLinus Torvalds } 7671da177e4SLinus Torvalds if (len > 0) 768fc19f381SStefan Haberland printk(KERN_ERR "%s", page); 7691da177e4SLinus Torvalds free_page((unsigned long) page); 7701da177e4SLinus Torvalds } 7711da177e4SLinus Torvalds 7721da177e4SLinus Torvalds /* 7731da177e4SLinus Torvalds * max_blocks is dependent on the amount of storage that is available 7741da177e4SLinus Torvalds * in the static io buffer for each device. Currently each device has 7751da177e4SLinus Torvalds * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has 7761da177e4SLinus Torvalds * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use 7771da177e4SLinus Torvalds * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In 7781da177e4SLinus Torvalds * addition we have one define extent ccw + 16 bytes of data and a 7791da177e4SLinus Torvalds * locate record ccw for each block (stupid devices!) + 16 bytes of data. 7801da177e4SLinus Torvalds * That makes: 7811da177e4SLinus Torvalds * (8192 - 24 - 136 - 8 - 16) / 40 = 200.2 blocks at maximum. 7821da177e4SLinus Torvalds * We want to fit two into the available memory so that we can immediately 7831da177e4SLinus Torvalds * start the next request if one finishes off. That makes 100.1 blocks 7841da177e4SLinus Torvalds * for one request. Give a little safety and the result is 96. 7851da177e4SLinus Torvalds */ 7861da177e4SLinus Torvalds static struct dasd_discipline dasd_fba_discipline = { 7871da177e4SLinus Torvalds .owner = THIS_MODULE, 7881da177e4SLinus Torvalds .name = "FBA ", 7891da177e4SLinus Torvalds .ebcname = "FBA ", 7901da177e4SLinus Torvalds .max_blocks = 96, 7911da177e4SLinus Torvalds .check_device = dasd_fba_check_characteristics, 7921da177e4SLinus Torvalds .do_analysis = dasd_fba_do_analysis, 793a4d26c6aSStefan Weinhuber .verify_path = dasd_generic_verify_path, 7941da177e4SLinus Torvalds .fill_geometry = dasd_fba_fill_geometry, 7951da177e4SLinus Torvalds .start_IO = dasd_start_IO, 7961da177e4SLinus Torvalds .term_IO = dasd_term_IO, 7978e09f215SStefan Weinhuber .handle_terminated_request = dasd_fba_handle_terminated_request, 7981da177e4SLinus Torvalds .erp_action = dasd_fba_erp_action, 7991da177e4SLinus Torvalds .erp_postaction = dasd_fba_erp_postaction, 8005a27e60dSStefan Weinhuber .check_for_device_change = dasd_fba_check_for_device_change, 8011da177e4SLinus Torvalds .build_cp = dasd_fba_build_cp, 8021da177e4SLinus Torvalds .free_cp = dasd_fba_free_cp, 8031da177e4SLinus Torvalds .dump_sense = dasd_fba_dump_sense, 804fc19f381SStefan Haberland .dump_sense_dbf = dasd_fba_dump_sense_dbf, 8051da177e4SLinus Torvalds .fill_info = dasd_fba_fill_info, 8061da177e4SLinus Torvalds }; 8071da177e4SLinus Torvalds 8081da177e4SLinus Torvalds static int __init 8091da177e4SLinus Torvalds dasd_fba_init(void) 8101da177e4SLinus Torvalds { 811736e6ea0SSebastian Ott int ret; 812736e6ea0SSebastian Ott 8131da177e4SLinus Torvalds ASCEBC(dasd_fba_discipline.ebcname, 4); 814736e6ea0SSebastian Ott ret = ccw_driver_register(&dasd_fba_driver); 815736e6ea0SSebastian Ott if (!ret) 816736e6ea0SSebastian Ott wait_for_device_probe(); 817736e6ea0SSebastian Ott 818736e6ea0SSebastian Ott return ret; 8191da177e4SLinus Torvalds } 8201da177e4SLinus Torvalds 8211da177e4SLinus Torvalds static void __exit 8221da177e4SLinus Torvalds dasd_fba_cleanup(void) 8231da177e4SLinus Torvalds { 8241da177e4SLinus Torvalds ccw_driver_unregister(&dasd_fba_driver); 8251da177e4SLinus Torvalds } 8261da177e4SLinus Torvalds 8271da177e4SLinus Torvalds module_init(dasd_fba_init); 8281da177e4SLinus Torvalds module_exit(dasd_fba_cleanup); 829