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; 43709192d5SJan Höppner static void *dasd_fba_zero_page; 441da177e4SLinus Torvalds 451da177e4SLinus Torvalds struct dasd_fba_private { 461da177e4SLinus Torvalds struct dasd_fba_characteristics rdc_data; 471da177e4SLinus Torvalds }; 481da177e4SLinus Torvalds 491da177e4SLinus Torvalds static struct ccw_device_id dasd_fba_ids[] = { 50d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x6310, 0, 0x9336, 0), .driver_info = 0x1}, 51d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3370, 0), .driver_info = 0x2}, 521da177e4SLinus Torvalds { /* end of list */ }, 531da177e4SLinus Torvalds }; 541da177e4SLinus Torvalds 551da177e4SLinus Torvalds MODULE_DEVICE_TABLE(ccw, dasd_fba_ids); 561da177e4SLinus Torvalds 571da177e4SLinus Torvalds static int 581da177e4SLinus Torvalds dasd_fba_set_online(struct ccw_device *cdev) 591da177e4SLinus Torvalds { 601da177e4SLinus Torvalds return dasd_generic_set_online(cdev, &dasd_fba_discipline); 611da177e4SLinus Torvalds } 621da177e4SLinus Torvalds 631da177e4SLinus Torvalds static struct ccw_driver dasd_fba_driver = { 643bda058bSSebastian Ott .driver = { 651da177e4SLinus Torvalds .name = "dasd-fba", 661da177e4SLinus Torvalds .owner = THIS_MODULE, 671987c551SJulian Wiedmann .dev_groups = dasd_dev_groups, 683bda058bSSebastian Ott }, 691da177e4SLinus Torvalds .ids = dasd_fba_ids, 7086f0a011SJulian Wiedmann .probe = dasd_generic_probe, 711da177e4SLinus Torvalds .remove = dasd_generic_remove, 721da177e4SLinus Torvalds .set_offline = dasd_generic_set_offline, 731da177e4SLinus Torvalds .set_online = dasd_fba_set_online, 741da177e4SLinus Torvalds .notify = dasd_generic_notify, 75a4d26c6aSStefan Weinhuber .path_event = dasd_generic_path_event, 76420f42ecSHeiko Carstens .int_class = IRQIO_DAS, 771da177e4SLinus Torvalds }; 781da177e4SLinus Torvalds 794d284cacSHeiko Carstens static void 801da177e4SLinus Torvalds define_extent(struct ccw1 * ccw, struct DE_fba_data *data, int rw, 811da177e4SLinus Torvalds int blksize, int beg, int nr) 821da177e4SLinus Torvalds { 831da177e4SLinus Torvalds ccw->cmd_code = DASD_FBA_CCW_DEFINE_EXTENT; 841da177e4SLinus Torvalds ccw->flags = 0; 851da177e4SLinus Torvalds ccw->count = 16; 861da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 871da177e4SLinus Torvalds memset(data, 0, sizeof (struct DE_fba_data)); 881da177e4SLinus Torvalds if (rw == WRITE) 891da177e4SLinus Torvalds (data->mask).perm = 0x0; 901da177e4SLinus Torvalds else if (rw == READ) 911da177e4SLinus Torvalds (data->mask).perm = 0x1; 921da177e4SLinus Torvalds else 931da177e4SLinus Torvalds data->mask.perm = 0x2; 941da177e4SLinus Torvalds data->blk_size = blksize; 951da177e4SLinus Torvalds data->ext_loc = beg; 961da177e4SLinus Torvalds data->ext_end = nr - 1; 971da177e4SLinus Torvalds } 981da177e4SLinus Torvalds 994d284cacSHeiko Carstens static void 1001da177e4SLinus Torvalds locate_record(struct ccw1 * ccw, struct LO_fba_data *data, int rw, 1011da177e4SLinus Torvalds int block_nr, int block_ct) 1021da177e4SLinus Torvalds { 1031da177e4SLinus Torvalds ccw->cmd_code = DASD_FBA_CCW_LOCATE; 1041da177e4SLinus Torvalds ccw->flags = 0; 1051da177e4SLinus Torvalds ccw->count = 8; 1061da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 1071da177e4SLinus Torvalds memset(data, 0, sizeof (struct LO_fba_data)); 1081da177e4SLinus Torvalds if (rw == WRITE) 1091da177e4SLinus Torvalds data->operation.cmd = 0x5; 1101da177e4SLinus Torvalds else if (rw == READ) 1111da177e4SLinus Torvalds data->operation.cmd = 0x6; 1121da177e4SLinus Torvalds else 1131da177e4SLinus Torvalds data->operation.cmd = 0x8; 1141da177e4SLinus Torvalds data->blk_nr = block_nr; 1151da177e4SLinus Torvalds data->blk_ct = block_ct; 1161da177e4SLinus Torvalds } 1171da177e4SLinus Torvalds 1181da177e4SLinus Torvalds static int 1191da177e4SLinus Torvalds dasd_fba_check_characteristics(struct dasd_device *device) 1201da177e4SLinus Torvalds { 121543691a4SSebastian Ott struct dasd_fba_private *private = device->private; 1221da177e4SLinus Torvalds struct ccw_device *cdev = device->cdev; 123543691a4SSebastian Ott struct dasd_block *block; 124543691a4SSebastian Ott int readonly, rc; 1251da177e4SLinus Torvalds 12692636b15SSebastian Ott if (!private) { 12792636b15SSebastian Ott private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); 12892636b15SSebastian Ott if (!private) { 129fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 130fc19f381SStefan Haberland "Allocating memory for private DASD " 131fc19f381SStefan Haberland "data failed\n"); 1321da177e4SLinus Torvalds return -ENOMEM; 1331da177e4SLinus Torvalds } 134543691a4SSebastian Ott device->private = private; 13592636b15SSebastian Ott } else { 13692636b15SSebastian Ott memset(private, 0, sizeof(*private)); 1371da177e4SLinus Torvalds } 1388e09f215SStefan Weinhuber block = dasd_alloc_block(); 1398e09f215SStefan Weinhuber if (IS_ERR(block)) { 140b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s", "could not allocate " 141b8ed5dd5SStefan Haberland "dasd block structure"); 1427337194fSCornelia Huck device->private = NULL; 1437337194fSCornelia Huck kfree(private); 1448e09f215SStefan Weinhuber return PTR_ERR(block); 1458e09f215SStefan Weinhuber } 1468e09f215SStefan Weinhuber device->block = block; 1478e09f215SStefan Weinhuber block->base = device; 1488e09f215SStefan Weinhuber 1491da177e4SLinus Torvalds /* Read Device Characteristics */ 15068b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_FBA_MAGIC, 15168b781feSStefan Haberland &private->rdc_data, 32); 1521da177e4SLinus Torvalds if (rc) { 153b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, cdev, "Read device " 154b8ed5dd5SStefan Haberland "characteristics returned error %d", rc); 1557337194fSCornelia Huck device->block = NULL; 1567337194fSCornelia Huck dasd_free_block(block); 1577337194fSCornelia Huck device->private = NULL; 1587337194fSCornelia Huck kfree(private); 1591da177e4SLinus Torvalds return rc; 1601da177e4SLinus Torvalds } 1611da177e4SLinus Torvalds 1627c8faa86SStefan Haberland device->default_expires = DASD_EXPIRES; 1631f1ee9adSHannes Reinecke device->default_retries = FBA_DEFAULT_RETRIES; 164c9346151SStefan Haberland dasd_path_set_opm(device, LPM_ANYPATH); 1657c8faa86SStefan Haberland 16633b62a30SStefan Weinhuber readonly = dasd_device_is_ro(device); 16733b62a30SStefan Weinhuber if (readonly) 16833b62a30SStefan Weinhuber set_bit(DASD_FLAG_DEVICE_RO, &device->flags); 16933b62a30SStefan Weinhuber 17028b841b3SJan Höppner /* FBA supports discard, set the according feature bit */ 17128b841b3SJan Höppner dasd_set_feature(cdev, DASD_FEATURE_DISCARD, 1); 17228b841b3SJan Höppner 173fc19f381SStefan Haberland dev_info(&device->cdev->dev, 174fc19f381SStefan Haberland "New FBA DASD %04X/%02X (CU %04X/%02X) with %d MB " 17533b62a30SStefan Weinhuber "and %d B/blk%s\n", 1761da177e4SLinus Torvalds cdev->id.dev_type, 1771da177e4SLinus Torvalds cdev->id.dev_model, 1781da177e4SLinus Torvalds cdev->id.cu_type, 1791da177e4SLinus Torvalds cdev->id.cu_model, 1801da177e4SLinus Torvalds ((private->rdc_data.blk_bdsa * 1811da177e4SLinus Torvalds (private->rdc_data.blk_size >> 9)) >> 11), 18233b62a30SStefan Weinhuber private->rdc_data.blk_size, 18333b62a30SStefan Weinhuber readonly ? ", read-only device" : ""); 1841da177e4SLinus Torvalds return 0; 1851da177e4SLinus Torvalds } 1861da177e4SLinus Torvalds 1878e09f215SStefan Weinhuber static int dasd_fba_do_analysis(struct dasd_block *block) 1881da177e4SLinus Torvalds { 189543691a4SSebastian Ott struct dasd_fba_private *private = block->base->private; 1901da177e4SLinus Torvalds int sb, rc; 1911da177e4SLinus Torvalds 1921da177e4SLinus Torvalds rc = dasd_check_blocksize(private->rdc_data.blk_size); 1931da177e4SLinus Torvalds if (rc) { 194fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, block->base, "unknown blocksize %d", 1951da177e4SLinus Torvalds private->rdc_data.blk_size); 1961da177e4SLinus Torvalds return rc; 1971da177e4SLinus Torvalds } 1988e09f215SStefan Weinhuber block->blocks = private->rdc_data.blk_bdsa; 1998e09f215SStefan Weinhuber block->bp_block = private->rdc_data.blk_size; 2008e09f215SStefan Weinhuber block->s2b_shift = 0; /* bits to shift 512 to get a block */ 2011da177e4SLinus Torvalds for (sb = 512; sb < private->rdc_data.blk_size; sb = sb << 1) 2028e09f215SStefan Weinhuber block->s2b_shift++; 2031da177e4SLinus Torvalds return 0; 2041da177e4SLinus Torvalds } 2051da177e4SLinus Torvalds 2068e09f215SStefan Weinhuber static int dasd_fba_fill_geometry(struct dasd_block *block, 2078e09f215SStefan Weinhuber struct hd_geometry *geo) 2081da177e4SLinus Torvalds { 2098e09f215SStefan Weinhuber if (dasd_check_blocksize(block->bp_block) != 0) 2101da177e4SLinus Torvalds return -EINVAL; 2118e09f215SStefan Weinhuber geo->cylinders = (block->blocks << block->s2b_shift) >> 10; 2121da177e4SLinus Torvalds geo->heads = 16; 2138e09f215SStefan Weinhuber geo->sectors = 128 >> block->s2b_shift; 2141da177e4SLinus Torvalds return 0; 2151da177e4SLinus Torvalds } 2161da177e4SLinus Torvalds 2171da177e4SLinus Torvalds static dasd_erp_fn_t 2181da177e4SLinus Torvalds dasd_fba_erp_action(struct dasd_ccw_req * cqr) 2191da177e4SLinus Torvalds { 2201da177e4SLinus Torvalds return dasd_default_erp_action; 2211da177e4SLinus Torvalds } 2221da177e4SLinus Torvalds 2231da177e4SLinus Torvalds static dasd_erp_fn_t 2241da177e4SLinus Torvalds dasd_fba_erp_postaction(struct dasd_ccw_req * cqr) 2251da177e4SLinus Torvalds { 2261da177e4SLinus Torvalds if (cqr->function == dasd_default_erp_action) 2271da177e4SLinus Torvalds return dasd_default_erp_postaction; 2281da177e4SLinus Torvalds 229fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, cqr->startdev, "unknown ERP action %p", 2301da177e4SLinus Torvalds cqr->function); 2311da177e4SLinus Torvalds return NULL; 2321da177e4SLinus Torvalds } 2331da177e4SLinus Torvalds 2345a27e60dSStefan Weinhuber static void dasd_fba_check_for_device_change(struct dasd_device *device, 2355a27e60dSStefan Weinhuber struct dasd_ccw_req *cqr, 2368e09f215SStefan Weinhuber struct irb *irb) 2378e09f215SStefan Weinhuber { 2388e09f215SStefan Weinhuber char mask; 2398e09f215SStefan Weinhuber 2408e09f215SStefan Weinhuber /* first of all check for state change pending interrupt */ 2418e09f215SStefan Weinhuber mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 2425a27e60dSStefan Weinhuber if ((irb->scsw.cmd.dstat & mask) == mask) 2438e09f215SStefan Weinhuber dasd_generic_handle_state_change(device); 2448e09f215SStefan Weinhuber }; 2458e09f215SStefan Weinhuber 24628b841b3SJan Höppner 24728b841b3SJan Höppner /* 24828b841b3SJan Höppner * Builds a CCW with no data payload 24928b841b3SJan Höppner */ 25028b841b3SJan Höppner static void ccw_write_no_data(struct ccw1 *ccw) 25128b841b3SJan Höppner { 25228b841b3SJan Höppner ccw->cmd_code = DASD_FBA_CCW_WRITE; 25328b841b3SJan Höppner ccw->flags |= CCW_FLAG_SLI; 25428b841b3SJan Höppner ccw->count = 0; 25528b841b3SJan Höppner } 25628b841b3SJan Höppner 25728b841b3SJan Höppner /* 25828b841b3SJan Höppner * Builds a CCW that writes only zeroes. 25928b841b3SJan Höppner */ 26028b841b3SJan Höppner static void ccw_write_zero(struct ccw1 *ccw, int count) 26128b841b3SJan Höppner { 26228b841b3SJan Höppner ccw->cmd_code = DASD_FBA_CCW_WRITE; 26328b841b3SJan Höppner ccw->flags |= CCW_FLAG_SLI; 26428b841b3SJan Höppner ccw->count = count; 265709192d5SJan Höppner ccw->cda = (__u32) (addr_t) dasd_fba_zero_page; 26628b841b3SJan Höppner } 26728b841b3SJan Höppner 26828b841b3SJan Höppner /* 26928b841b3SJan Höppner * Helper function to count the amount of necessary CCWs within a given range 27028b841b3SJan Höppner * with 4k alignment and command chaining in mind. 27128b841b3SJan Höppner */ 27228b841b3SJan Höppner static int count_ccws(sector_t first_rec, sector_t last_rec, 27328b841b3SJan Höppner unsigned int blocks_per_page) 27428b841b3SJan Höppner { 27528b841b3SJan Höppner sector_t wz_stop = 0, d_stop = 0; 27628b841b3SJan Höppner int cur_pos = 0; 27728b841b3SJan Höppner int count = 0; 27828b841b3SJan Höppner 27928b841b3SJan Höppner if (first_rec % blocks_per_page != 0) { 28028b841b3SJan Höppner wz_stop = first_rec + blocks_per_page - 28128b841b3SJan Höppner (first_rec % blocks_per_page) - 1; 28228b841b3SJan Höppner if (wz_stop > last_rec) 28328b841b3SJan Höppner wz_stop = last_rec; 28428b841b3SJan Höppner cur_pos = wz_stop - first_rec + 1; 28528b841b3SJan Höppner count++; 28628b841b3SJan Höppner } 28728b841b3SJan Höppner 28828b841b3SJan Höppner if (last_rec - (first_rec + cur_pos) + 1 >= blocks_per_page) { 28928b841b3SJan Höppner if ((last_rec - blocks_per_page + 1) % blocks_per_page != 0) 29028b841b3SJan Höppner d_stop = last_rec - ((last_rec - blocks_per_page + 1) % 29128b841b3SJan Höppner blocks_per_page); 29228b841b3SJan Höppner else 29328b841b3SJan Höppner d_stop = last_rec; 29428b841b3SJan Höppner 29528b841b3SJan Höppner cur_pos += d_stop - (first_rec + cur_pos) + 1; 29628b841b3SJan Höppner count++; 29728b841b3SJan Höppner } 29828b841b3SJan Höppner 29928b841b3SJan Höppner if (cur_pos == 0 || first_rec + cur_pos - 1 < last_rec) 30028b841b3SJan Höppner count++; 30128b841b3SJan Höppner 30228b841b3SJan Höppner return count; 30328b841b3SJan Höppner } 30428b841b3SJan Höppner 30528b841b3SJan Höppner /* 30628b841b3SJan Höppner * This function builds a CCW request for block layer discard requests. 30728b841b3SJan Höppner * Each page in the z/VM hypervisor that represents certain records of an FBA 30828b841b3SJan Höppner * device will be padded with zeros. This is a special behaviour of the WRITE 30928b841b3SJan Höppner * command which is triggered when no data payload is added to the CCW. 31028b841b3SJan Höppner * 31128b841b3SJan Höppner * Note: Due to issues in some z/VM versions, we can't fully utilise this 31228b841b3SJan Höppner * special behaviour. We have to keep a 4k (or 8 block) alignment in mind to 31328b841b3SJan Höppner * work around those issues and write actual zeroes to the unaligned parts in 31428b841b3SJan Höppner * the request. This workaround might be removed in the future. 31528b841b3SJan Höppner */ 31628b841b3SJan Höppner static struct dasd_ccw_req *dasd_fba_build_cp_discard( 31728b841b3SJan Höppner struct dasd_device *memdev, 31828b841b3SJan Höppner struct dasd_block *block, 31928b841b3SJan Höppner struct request *req) 32028b841b3SJan Höppner { 32128b841b3SJan Höppner struct LO_fba_data *LO_data; 32228b841b3SJan Höppner struct dasd_ccw_req *cqr; 32328b841b3SJan Höppner struct ccw1 *ccw; 32428b841b3SJan Höppner 32528b841b3SJan Höppner sector_t wz_stop = 0, d_stop = 0; 32628b841b3SJan Höppner sector_t first_rec, last_rec; 32728b841b3SJan Höppner 32828b841b3SJan Höppner unsigned int blksize = block->bp_block; 32928b841b3SJan Höppner unsigned int blocks_per_page; 33028b841b3SJan Höppner int wz_count = 0; 33128b841b3SJan Höppner int d_count = 0; 33228b841b3SJan Höppner int cur_pos = 0; /* Current position within the extent */ 33328b841b3SJan Höppner int count = 0; 33428b841b3SJan Höppner int cplength; 33528b841b3SJan Höppner int datasize; 33628b841b3SJan Höppner int nr_ccws; 33728b841b3SJan Höppner 33828b841b3SJan Höppner first_rec = blk_rq_pos(req) >> block->s2b_shift; 33928b841b3SJan Höppner last_rec = 34028b841b3SJan Höppner (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 34128b841b3SJan Höppner count = last_rec - first_rec + 1; 34228b841b3SJan Höppner 34328b841b3SJan Höppner blocks_per_page = BLOCKS_PER_PAGE(blksize); 34428b841b3SJan Höppner nr_ccws = count_ccws(first_rec, last_rec, blocks_per_page); 34528b841b3SJan Höppner 34628b841b3SJan Höppner /* define extent + nr_ccws * locate record + nr_ccws * single CCW */ 34728b841b3SJan Höppner cplength = 1 + 2 * nr_ccws; 34828b841b3SJan Höppner datasize = sizeof(struct DE_fba_data) + 34928b841b3SJan Höppner nr_ccws * (sizeof(struct LO_fba_data) + sizeof(struct ccw1)); 35028b841b3SJan Höppner 351c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_FBA_MAGIC, cplength, datasize, memdev, 352c5205f2fSSebastian Ott blk_mq_rq_to_pdu(req)); 35328b841b3SJan Höppner if (IS_ERR(cqr)) 35428b841b3SJan Höppner return cqr; 35528b841b3SJan Höppner 35628b841b3SJan Höppner ccw = cqr->cpaddr; 35728b841b3SJan Höppner 35828b841b3SJan Höppner define_extent(ccw++, cqr->data, WRITE, blksize, first_rec, count); 35928b841b3SJan Höppner LO_data = cqr->data + sizeof(struct DE_fba_data); 36028b841b3SJan Höppner 36128b841b3SJan Höppner /* First part is not aligned. Calculate range to write zeroes. */ 36228b841b3SJan Höppner if (first_rec % blocks_per_page != 0) { 36328b841b3SJan Höppner wz_stop = first_rec + blocks_per_page - 36428b841b3SJan Höppner (first_rec % blocks_per_page) - 1; 36528b841b3SJan Höppner if (wz_stop > last_rec) 36628b841b3SJan Höppner wz_stop = last_rec; 36728b841b3SJan Höppner wz_count = wz_stop - first_rec + 1; 36828b841b3SJan Höppner 36928b841b3SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 37028b841b3SJan Höppner locate_record(ccw++, LO_data++, WRITE, cur_pos, wz_count); 37128b841b3SJan Höppner 37228b841b3SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 37328b841b3SJan Höppner ccw_write_zero(ccw++, wz_count * blksize); 37428b841b3SJan Höppner 37528b841b3SJan Höppner cur_pos = wz_count; 37628b841b3SJan Höppner } 37728b841b3SJan Höppner 37828b841b3SJan Höppner /* We can do proper discard when we've got at least blocks_per_page blocks. */ 37928b841b3SJan Höppner if (last_rec - (first_rec + cur_pos) + 1 >= blocks_per_page) { 38028b841b3SJan Höppner /* is last record at page boundary? */ 38128b841b3SJan Höppner if ((last_rec - blocks_per_page + 1) % blocks_per_page != 0) 38228b841b3SJan Höppner d_stop = last_rec - ((last_rec - blocks_per_page + 1) % 38328b841b3SJan Höppner blocks_per_page); 38428b841b3SJan Höppner else 38528b841b3SJan Höppner d_stop = last_rec; 38628b841b3SJan Höppner 38728b841b3SJan Höppner d_count = d_stop - (first_rec + cur_pos) + 1; 38828b841b3SJan Höppner 38928b841b3SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 39028b841b3SJan Höppner locate_record(ccw++, LO_data++, WRITE, cur_pos, d_count); 39128b841b3SJan Höppner 39228b841b3SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 39328b841b3SJan Höppner ccw_write_no_data(ccw++); 39428b841b3SJan Höppner 39528b841b3SJan Höppner cur_pos += d_count; 39628b841b3SJan Höppner } 39728b841b3SJan Höppner 39828b841b3SJan Höppner /* We might still have some bits left which need to be zeroed. */ 39928b841b3SJan Höppner if (cur_pos == 0 || first_rec + cur_pos - 1 < last_rec) { 40028b841b3SJan Höppner if (d_stop != 0) 40128b841b3SJan Höppner wz_count = last_rec - d_stop; 40228b841b3SJan Höppner else if (wz_stop != 0) 40328b841b3SJan Höppner wz_count = last_rec - wz_stop; 40428b841b3SJan Höppner else 40528b841b3SJan Höppner wz_count = count; 40628b841b3SJan Höppner 40728b841b3SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 40828b841b3SJan Höppner locate_record(ccw++, LO_data++, WRITE, cur_pos, wz_count); 40928b841b3SJan Höppner 41028b841b3SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 41128b841b3SJan Höppner ccw_write_zero(ccw++, wz_count * blksize); 41228b841b3SJan Höppner } 41328b841b3SJan Höppner 41428b841b3SJan Höppner if (blk_noretry_request(req) || 41528b841b3SJan Höppner block->base->features & DASD_FEATURE_FAILFAST) 41628b841b3SJan Höppner set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 41728b841b3SJan Höppner 41828b841b3SJan Höppner cqr->startdev = memdev; 41928b841b3SJan Höppner cqr->memdev = memdev; 42028b841b3SJan Höppner cqr->block = block; 42128b841b3SJan Höppner cqr->expires = memdev->default_expires * HZ; /* default 5 minutes */ 42228b841b3SJan Höppner cqr->retries = memdev->default_retries; 42328b841b3SJan Höppner cqr->buildclk = get_tod_clock(); 42428b841b3SJan Höppner cqr->status = DASD_CQR_FILLED; 42528b841b3SJan Höppner 42628b841b3SJan Höppner return cqr; 42728b841b3SJan Höppner } 42828b841b3SJan Höppner 42928b841b3SJan Höppner static struct dasd_ccw_req *dasd_fba_build_cp_regular( 43028b841b3SJan Höppner struct dasd_device *memdev, 4318e09f215SStefan Weinhuber struct dasd_block *block, 4328e09f215SStefan Weinhuber struct request *req) 4331da177e4SLinus Torvalds { 434543691a4SSebastian Ott struct dasd_fba_private *private = block->base->private; 4351da177e4SLinus Torvalds unsigned long *idaws; 4361da177e4SLinus Torvalds struct LO_fba_data *LO_data; 4371da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 4381da177e4SLinus Torvalds struct ccw1 *ccw; 4395705f702SNeilBrown struct req_iterator iter; 4407988613bSKent Overstreet struct bio_vec bv; 4411da177e4SLinus Torvalds char *dst; 4421da177e4SLinus Torvalds int count, cidaw, cplength, datasize; 4431da177e4SLinus Torvalds sector_t recid, first_rec, last_rec; 4441da177e4SLinus Torvalds unsigned int blksize, off; 4451da177e4SLinus Torvalds unsigned char cmd; 4461da177e4SLinus Torvalds 4471da177e4SLinus Torvalds if (rq_data_dir(req) == READ) { 4481da177e4SLinus Torvalds cmd = DASD_FBA_CCW_READ; 4491da177e4SLinus Torvalds } else if (rq_data_dir(req) == WRITE) { 4501da177e4SLinus Torvalds cmd = DASD_FBA_CCW_WRITE; 4511da177e4SLinus Torvalds } else 4521da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 4538e09f215SStefan Weinhuber blksize = block->bp_block; 4541da177e4SLinus Torvalds /* Calculate record id of first and last block. */ 45583096ebfSTejun Heo first_rec = blk_rq_pos(req) >> block->s2b_shift; 45683096ebfSTejun Heo last_rec = 45783096ebfSTejun Heo (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 4581da177e4SLinus Torvalds /* Check struct bio and count the number of blocks for the request. */ 4591da177e4SLinus Torvalds count = 0; 4601da177e4SLinus Torvalds cidaw = 0; 4615705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 4627988613bSKent Overstreet if (bv.bv_len & (blksize - 1)) 4631da177e4SLinus Torvalds /* Fba can only do full blocks. */ 4641da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 4657988613bSKent Overstreet count += bv.bv_len >> (block->s2b_shift + 9); 4667988613bSKent Overstreet if (idal_is_needed (page_address(bv.bv_page), bv.bv_len)) 4677988613bSKent Overstreet cidaw += bv.bv_len / blksize; 4681da177e4SLinus Torvalds } 4691da177e4SLinus Torvalds /* Paranoia. */ 4701da177e4SLinus Torvalds if (count != last_rec - first_rec + 1) 4711da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 4721da177e4SLinus Torvalds /* 1x define extent + 1x locate record + number of blocks */ 4731da177e4SLinus Torvalds cplength = 2 + count; 4741da177e4SLinus Torvalds /* 1x define extent + 1x locate record */ 4751da177e4SLinus Torvalds datasize = sizeof(struct DE_fba_data) + sizeof(struct LO_fba_data) + 4761da177e4SLinus Torvalds cidaw * sizeof(unsigned long); 4771da177e4SLinus Torvalds /* 4781da177e4SLinus Torvalds * Find out number of additional locate record ccws if the device 4791da177e4SLinus Torvalds * can't do data chaining. 4801da177e4SLinus Torvalds */ 4811da177e4SLinus Torvalds if (private->rdc_data.mode.bits.data_chain == 0) { 4821da177e4SLinus Torvalds cplength += count - 1; 4831da177e4SLinus Torvalds datasize += (count - 1)*sizeof(struct LO_fba_data); 4841da177e4SLinus Torvalds } 4851da177e4SLinus Torvalds /* Allocate the ccw request. */ 486c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_FBA_MAGIC, cplength, datasize, memdev, 487c5205f2fSSebastian Ott blk_mq_rq_to_pdu(req)); 4881da177e4SLinus Torvalds if (IS_ERR(cqr)) 4891da177e4SLinus Torvalds return cqr; 4901da177e4SLinus Torvalds ccw = cqr->cpaddr; 4911da177e4SLinus Torvalds /* First ccw is define extent. */ 4921da177e4SLinus Torvalds define_extent(ccw++, cqr->data, rq_data_dir(req), 49383096ebfSTejun Heo block->bp_block, blk_rq_pos(req), blk_rq_sectors(req)); 4941da177e4SLinus Torvalds /* Build locate_record + read/write ccws. */ 4951da177e4SLinus Torvalds idaws = (unsigned long *) (cqr->data + sizeof(struct DE_fba_data)); 4961da177e4SLinus Torvalds LO_data = (struct LO_fba_data *) (idaws + cidaw); 4971da177e4SLinus Torvalds /* Locate record for all blocks for smart devices. */ 4981da177e4SLinus Torvalds if (private->rdc_data.mode.bits.data_chain != 0) { 4991da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 5001da177e4SLinus Torvalds locate_record(ccw++, LO_data++, rq_data_dir(req), 0, count); 5011da177e4SLinus Torvalds } 5021da177e4SLinus Torvalds recid = first_rec; 5035705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 5047988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 5051da177e4SLinus Torvalds if (dasd_page_cache) { 5061da177e4SLinus Torvalds char *copy = kmem_cache_alloc(dasd_page_cache, 507441e143eSChristoph Lameter GFP_DMA | __GFP_NOWARN); 5081da177e4SLinus Torvalds if (copy && rq_data_dir(req) == WRITE) 5097988613bSKent Overstreet memcpy(copy + bv.bv_offset, dst, bv.bv_len); 5101da177e4SLinus Torvalds if (copy) 5117988613bSKent Overstreet dst = copy + bv.bv_offset; 5121da177e4SLinus Torvalds } 5137988613bSKent Overstreet for (off = 0; off < bv.bv_len; off += blksize) { 5141da177e4SLinus Torvalds /* Locate record for stupid devices. */ 5151da177e4SLinus Torvalds if (private->rdc_data.mode.bits.data_chain == 0) { 5161da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 5171da177e4SLinus Torvalds locate_record(ccw, LO_data++, 5181da177e4SLinus Torvalds rq_data_dir(req), 5191da177e4SLinus Torvalds recid - first_rec, 1); 5201da177e4SLinus Torvalds ccw->flags = CCW_FLAG_CC; 5211da177e4SLinus Torvalds ccw++; 5221da177e4SLinus Torvalds } else { 5231da177e4SLinus Torvalds if (recid > first_rec) 5241da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_DC; 5251da177e4SLinus Torvalds else 5261da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 5271da177e4SLinus Torvalds } 5281da177e4SLinus Torvalds ccw->cmd_code = cmd; 5298e09f215SStefan Weinhuber ccw->count = block->bp_block; 5301da177e4SLinus Torvalds if (idal_is_needed(dst, blksize)) { 5311da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) idaws; 5321da177e4SLinus Torvalds ccw->flags = CCW_FLAG_IDA; 5331da177e4SLinus Torvalds idaws = idal_create_words(idaws, dst, blksize); 5341da177e4SLinus Torvalds } else { 5351da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) dst; 5361da177e4SLinus Torvalds ccw->flags = 0; 5371da177e4SLinus Torvalds } 5381da177e4SLinus Torvalds ccw++; 5391da177e4SLinus Torvalds dst += blksize; 5401da177e4SLinus Torvalds recid++; 5411da177e4SLinus Torvalds } 5421da177e4SLinus Torvalds } 54313de227bSHolger Smolinski if (blk_noretry_request(req) || 54413de227bSHolger Smolinski block->base->features & DASD_FEATURE_FAILFAST) 5451c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 5468e09f215SStefan Weinhuber cqr->startdev = memdev; 5478e09f215SStefan Weinhuber cqr->memdev = memdev; 5488e09f215SStefan Weinhuber cqr->block = block; 5497c8faa86SStefan Haberland cqr->expires = memdev->default_expires * HZ; /* default 5 minutes */ 5501f1ee9adSHannes Reinecke cqr->retries = memdev->default_retries; 5511aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 5521da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 5531da177e4SLinus Torvalds return cqr; 5541da177e4SLinus Torvalds } 5551da177e4SLinus Torvalds 55628b841b3SJan Höppner static struct dasd_ccw_req *dasd_fba_build_cp(struct dasd_device *memdev, 55728b841b3SJan Höppner struct dasd_block *block, 55828b841b3SJan Höppner struct request *req) 55928b841b3SJan Höppner { 56028b841b3SJan Höppner if (req_op(req) == REQ_OP_DISCARD || req_op(req) == REQ_OP_WRITE_ZEROES) 56128b841b3SJan Höppner return dasd_fba_build_cp_discard(memdev, block, req); 56228b841b3SJan Höppner else 56328b841b3SJan Höppner return dasd_fba_build_cp_regular(memdev, block, req); 56428b841b3SJan Höppner } 56528b841b3SJan Höppner 5661da177e4SLinus Torvalds static int 5671da177e4SLinus Torvalds dasd_fba_free_cp(struct dasd_ccw_req *cqr, struct request *req) 5681da177e4SLinus Torvalds { 569543691a4SSebastian Ott struct dasd_fba_private *private = cqr->block->base->private; 5701da177e4SLinus Torvalds struct ccw1 *ccw; 5715705f702SNeilBrown struct req_iterator iter; 5727988613bSKent Overstreet struct bio_vec bv; 5731da177e4SLinus Torvalds char *dst, *cda; 5741da177e4SLinus Torvalds unsigned int blksize, off; 5755705f702SNeilBrown int status; 5761da177e4SLinus Torvalds 5771da177e4SLinus Torvalds if (!dasd_page_cache) 5781da177e4SLinus Torvalds goto out; 5798e09f215SStefan Weinhuber blksize = cqr->block->bp_block; 5801da177e4SLinus Torvalds ccw = cqr->cpaddr; 5811da177e4SLinus Torvalds /* Skip over define extent & locate record. */ 5821da177e4SLinus Torvalds ccw++; 5831da177e4SLinus Torvalds if (private->rdc_data.mode.bits.data_chain != 0) 5841da177e4SLinus Torvalds ccw++; 5855705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 5867988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 5877988613bSKent Overstreet for (off = 0; off < bv.bv_len; off += blksize) { 5881da177e4SLinus Torvalds /* Skip locate record. */ 5891da177e4SLinus Torvalds if (private->rdc_data.mode.bits.data_chain == 0) 5901da177e4SLinus Torvalds ccw++; 5911da177e4SLinus Torvalds if (dst) { 5921da177e4SLinus Torvalds if (ccw->flags & CCW_FLAG_IDA) 5931da177e4SLinus Torvalds cda = *((char **)((addr_t) ccw->cda)); 5941da177e4SLinus Torvalds else 5951da177e4SLinus Torvalds cda = (char *)((addr_t) ccw->cda); 5961da177e4SLinus Torvalds if (dst != cda) { 5971da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 5987988613bSKent Overstreet memcpy(dst, cda, bv.bv_len); 5991da177e4SLinus Torvalds kmem_cache_free(dasd_page_cache, 6001da177e4SLinus Torvalds (void *)((addr_t)cda & PAGE_MASK)); 6011da177e4SLinus Torvalds } 6021da177e4SLinus Torvalds dst = NULL; 6031da177e4SLinus Torvalds } 6041da177e4SLinus Torvalds ccw++; 6051da177e4SLinus Torvalds } 6061da177e4SLinus Torvalds } 6071da177e4SLinus Torvalds out: 6081da177e4SLinus Torvalds status = cqr->status == DASD_CQR_DONE; 6098e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 6101da177e4SLinus Torvalds return status; 6111da177e4SLinus Torvalds } 6121da177e4SLinus Torvalds 6138e09f215SStefan Weinhuber static void dasd_fba_handle_terminated_request(struct dasd_ccw_req *cqr) 6148e09f215SStefan Weinhuber { 615a2ace466SHannes Reinecke if (cqr->retries < 0) 616a2ace466SHannes Reinecke cqr->status = DASD_CQR_FAILED; 617a2ace466SHannes Reinecke else 6188e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 6198e09f215SStefan Weinhuber }; 6208e09f215SStefan Weinhuber 6211da177e4SLinus Torvalds static int 6221da177e4SLinus Torvalds dasd_fba_fill_info(struct dasd_device * device, 6231da177e4SLinus Torvalds struct dasd_information2_t * info) 6241da177e4SLinus Torvalds { 625543691a4SSebastian Ott struct dasd_fba_private *private = device->private; 626543691a4SSebastian Ott 6271da177e4SLinus Torvalds info->label_block = 1; 6281da177e4SLinus Torvalds info->FBA_layout = 1; 6291da177e4SLinus Torvalds info->format = DASD_FORMAT_LDL; 630543691a4SSebastian Ott info->characteristics_size = sizeof(private->rdc_data); 631543691a4SSebastian Ott memcpy(info->characteristics, &private->rdc_data, 632543691a4SSebastian Ott sizeof(private->rdc_data)); 6331da177e4SLinus Torvalds info->confdata_size = 0; 6341da177e4SLinus Torvalds return 0; 6351da177e4SLinus Torvalds } 6361da177e4SLinus Torvalds 6371da177e4SLinus Torvalds static void 638aeec92caSStefan Haberland dasd_fba_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 639aeec92caSStefan Haberland char *reason) 640fc19f381SStefan Haberland { 641aeec92caSStefan Haberland u64 *sense; 642aeec92caSStefan Haberland 643aeec92caSStefan Haberland sense = (u64 *) dasd_get_sense(irb); 644aeec92caSStefan Haberland if (sense) { 645fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_EMERG, device, 646aeec92caSStefan Haberland "%s: %s %02x%02x%02x %016llx %016llx %016llx " 647aeec92caSStefan Haberland "%016llx", reason, 648aeec92caSStefan Haberland scsw_is_tm(&irb->scsw) ? "t" : "c", 649aeec92caSStefan Haberland scsw_cc(&irb->scsw), scsw_cstat(&irb->scsw), 650aeec92caSStefan Haberland scsw_dstat(&irb->scsw), sense[0], sense[1], 651aeec92caSStefan Haberland sense[2], sense[3]); 652fc19f381SStefan Haberland } else { 653fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_EMERG, device, "%s", 654fc19f381SStefan Haberland "SORRY - NO VALID SENSE AVAILABLE\n"); 655fc19f381SStefan Haberland } 656fc19f381SStefan Haberland } 657fc19f381SStefan Haberland 658fc19f381SStefan Haberland 659fc19f381SStefan Haberland static void 6601da177e4SLinus Torvalds dasd_fba_dump_sense(struct dasd_device *device, struct dasd_ccw_req * req, 6611da177e4SLinus Torvalds struct irb *irb) 6621da177e4SLinus Torvalds { 6631da177e4SLinus Torvalds char *page; 6641da177e4SLinus Torvalds struct ccw1 *act, *end, *last; 6651da177e4SLinus Torvalds int len, sl, sct, count; 6661da177e4SLinus Torvalds 6671da177e4SLinus Torvalds page = (char *) get_zeroed_page(GFP_ATOMIC); 6681da177e4SLinus Torvalds if (page == NULL) { 669fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 6701da177e4SLinus Torvalds "No memory to dump sense data"); 6711da177e4SLinus Torvalds return; 6721da177e4SLinus Torvalds } 673773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 6741da177e4SLinus Torvalds " I/O status report for device %s:\n", 6752a0217d5SKay Sievers dev_name(&device->cdev->dev)); 676773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 6771da177e4SLinus Torvalds " in req: %p CS: 0x%02X DS: 0x%02X\n", req, 67823d805b6SPeter Oberparleiter irb->scsw.cmd.cstat, irb->scsw.cmd.dstat); 679773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 6801da177e4SLinus Torvalds " device %s: Failing CCW: %p\n", 6812a0217d5SKay Sievers dev_name(&device->cdev->dev), 68223d805b6SPeter Oberparleiter (void *) (addr_t) irb->scsw.cmd.cpa); 6831da177e4SLinus Torvalds if (irb->esw.esw0.erw.cons) { 6841da177e4SLinus Torvalds for (sl = 0; sl < 4; sl++) { 685773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 6861da177e4SLinus Torvalds " Sense(hex) %2d-%2d:", 6871da177e4SLinus Torvalds (8 * sl), ((8 * sl) + 7)); 6881da177e4SLinus Torvalds 6891da177e4SLinus Torvalds for (sct = 0; sct < 8; sct++) { 6901da177e4SLinus Torvalds len += sprintf(page + len, " %02x", 6911da177e4SLinus Torvalds irb->ecw[8 * sl + sct]); 6921da177e4SLinus Torvalds } 6931da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 6941da177e4SLinus Torvalds } 6951da177e4SLinus Torvalds } else { 696773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 6971da177e4SLinus Torvalds " SORRY - NO VALID SENSE AVAILABLE\n"); 6981da177e4SLinus Torvalds } 699fc19f381SStefan Haberland printk(KERN_ERR "%s", page); 7001da177e4SLinus Torvalds 7011da177e4SLinus Torvalds /* dump the Channel Program */ 7021da177e4SLinus Torvalds /* print first CCWs (maximum 8) */ 7031da177e4SLinus Torvalds act = req->cpaddr; 7041da177e4SLinus Torvalds for (last = act; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 7051da177e4SLinus Torvalds end = min(act + 8, last); 706773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER " Related CP in req: %p\n", req); 7071da177e4SLinus Torvalds while (act <= end) { 708773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 7091da177e4SLinus Torvalds " CCW %p: %08X %08X DAT:", 7101da177e4SLinus Torvalds act, ((int *) act)[0], ((int *) act)[1]); 7111da177e4SLinus Torvalds for (count = 0; count < 32 && count < act->count; 7121da177e4SLinus Torvalds count += sizeof(int)) 7131da177e4SLinus Torvalds len += sprintf(page + len, " %08X", 7141da177e4SLinus Torvalds ((int *) (addr_t) act->cda) 7151da177e4SLinus Torvalds [(count>>2)]); 7161da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 7171da177e4SLinus Torvalds act++; 7181da177e4SLinus Torvalds } 719fc19f381SStefan Haberland printk(KERN_ERR "%s", page); 7201da177e4SLinus Torvalds 7211da177e4SLinus Torvalds 7221da177e4SLinus Torvalds /* print failing CCW area */ 7231da177e4SLinus Torvalds len = 0; 72423d805b6SPeter Oberparleiter if (act < ((struct ccw1 *)(addr_t) irb->scsw.cmd.cpa) - 2) { 72523d805b6SPeter Oberparleiter act = ((struct ccw1 *)(addr_t) irb->scsw.cmd.cpa) - 2; 726773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER "......\n"); 7271da177e4SLinus Torvalds } 72823d805b6SPeter Oberparleiter end = min((struct ccw1 *)(addr_t) irb->scsw.cmd.cpa + 2, last); 7291da177e4SLinus Torvalds while (act <= end) { 730773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 7311da177e4SLinus Torvalds " CCW %p: %08X %08X DAT:", 7321da177e4SLinus Torvalds act, ((int *) act)[0], ((int *) act)[1]); 7331da177e4SLinus Torvalds for (count = 0; count < 32 && count < act->count; 7341da177e4SLinus Torvalds count += sizeof(int)) 7351da177e4SLinus Torvalds len += sprintf(page + len, " %08X", 7361da177e4SLinus Torvalds ((int *) (addr_t) act->cda) 7371da177e4SLinus Torvalds [(count>>2)]); 7381da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 7391da177e4SLinus Torvalds act++; 7401da177e4SLinus Torvalds } 7411da177e4SLinus Torvalds 7421da177e4SLinus Torvalds /* print last CCWs */ 7431da177e4SLinus Torvalds if (act < last - 2) { 7441da177e4SLinus Torvalds act = last - 2; 745773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER "......\n"); 7461da177e4SLinus Torvalds } 7471da177e4SLinus Torvalds while (act <= last) { 748773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 7491da177e4SLinus Torvalds " CCW %p: %08X %08X DAT:", 7501da177e4SLinus Torvalds act, ((int *) act)[0], ((int *) act)[1]); 7511da177e4SLinus Torvalds for (count = 0; count < 32 && count < act->count; 7521da177e4SLinus Torvalds count += sizeof(int)) 7531da177e4SLinus Torvalds len += sprintf(page + len, " %08X", 7541da177e4SLinus Torvalds ((int *) (addr_t) act->cda) 7551da177e4SLinus Torvalds [(count>>2)]); 7561da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 7571da177e4SLinus Torvalds act++; 7581da177e4SLinus Torvalds } 7591da177e4SLinus Torvalds if (len > 0) 760fc19f381SStefan Haberland printk(KERN_ERR "%s", page); 7611da177e4SLinus Torvalds free_page((unsigned long) page); 7621da177e4SLinus Torvalds } 7631da177e4SLinus Torvalds 7641da177e4SLinus Torvalds /* 765a0610a8aSJan Höppner * Initialize block layer request queue. 7661da177e4SLinus Torvalds */ 767a0610a8aSJan Höppner static void dasd_fba_setup_blk_queue(struct dasd_block *block) 768a0610a8aSJan Höppner { 769a0610a8aSJan Höppner unsigned int logical_block_size = block->bp_block; 770a0610a8aSJan Höppner struct request_queue *q = block->request_queue; 771a0610a8aSJan Höppner unsigned int max_bytes, max_discard_sectors; 772a0610a8aSJan Höppner int max; 773a0610a8aSJan Höppner 774a0610a8aSJan Höppner max = DASD_FBA_MAX_BLOCKS << block->s2b_shift; 775a0610a8aSJan Höppner blk_queue_flag_set(QUEUE_FLAG_NONROT, q); 776a0610a8aSJan Höppner q->limits.max_dev_sectors = max; 777a0610a8aSJan Höppner blk_queue_logical_block_size(q, logical_block_size); 778a0610a8aSJan Höppner blk_queue_max_hw_sectors(q, max); 779a0610a8aSJan Höppner blk_queue_max_segments(q, USHRT_MAX); 780a0610a8aSJan Höppner /* With page sized segments each segment can be translated into one idaw/tidaw */ 781a0610a8aSJan Höppner blk_queue_max_segment_size(q, PAGE_SIZE); 782a0610a8aSJan Höppner blk_queue_segment_boundary(q, PAGE_SIZE - 1); 783a0610a8aSJan Höppner 784a0610a8aSJan Höppner q->limits.discard_granularity = logical_block_size; 785a0610a8aSJan Höppner q->limits.discard_alignment = PAGE_SIZE; 786a0610a8aSJan Höppner 787a0610a8aSJan Höppner /* Calculate max_discard_sectors and make it PAGE aligned */ 788a0610a8aSJan Höppner max_bytes = USHRT_MAX * logical_block_size; 789b5444153SJan Höppner max_bytes = ALIGN_DOWN(max_bytes, PAGE_SIZE); 790a0610a8aSJan Höppner max_discard_sectors = max_bytes / logical_block_size; 791a0610a8aSJan Höppner 792a0610a8aSJan Höppner blk_queue_max_discard_sectors(q, max_discard_sectors); 793a0610a8aSJan Höppner blk_queue_max_write_zeroes_sectors(q, max_discard_sectors); 794a0610a8aSJan Höppner blk_queue_flag_set(QUEUE_FLAG_DISCARD, q); 795a0610a8aSJan Höppner } 796a0610a8aSJan Höppner 797*c0c8a839SStefan Haberland static int dasd_fba_pe_handler(struct dasd_device *device, 798*c0c8a839SStefan Haberland __u8 tbvpm, __u8 fcsecpm) 799*c0c8a839SStefan Haberland { 800*c0c8a839SStefan Haberland return dasd_generic_verify_path(device, tbvpm); 801*c0c8a839SStefan Haberland } 802*c0c8a839SStefan Haberland 8031da177e4SLinus Torvalds static struct dasd_discipline dasd_fba_discipline = { 8041da177e4SLinus Torvalds .owner = THIS_MODULE, 8051da177e4SLinus Torvalds .name = "FBA ", 8061da177e4SLinus Torvalds .ebcname = "FBA ", 8071da177e4SLinus Torvalds .check_device = dasd_fba_check_characteristics, 8081da177e4SLinus Torvalds .do_analysis = dasd_fba_do_analysis, 809*c0c8a839SStefan Haberland .pe_handler = dasd_fba_pe_handler, 810a0610a8aSJan Höppner .setup_blk_queue = dasd_fba_setup_blk_queue, 8111da177e4SLinus Torvalds .fill_geometry = dasd_fba_fill_geometry, 8121da177e4SLinus Torvalds .start_IO = dasd_start_IO, 8131da177e4SLinus Torvalds .term_IO = dasd_term_IO, 8148e09f215SStefan Weinhuber .handle_terminated_request = dasd_fba_handle_terminated_request, 8151da177e4SLinus Torvalds .erp_action = dasd_fba_erp_action, 8161da177e4SLinus Torvalds .erp_postaction = dasd_fba_erp_postaction, 8175a27e60dSStefan Weinhuber .check_for_device_change = dasd_fba_check_for_device_change, 8181da177e4SLinus Torvalds .build_cp = dasd_fba_build_cp, 8191da177e4SLinus Torvalds .free_cp = dasd_fba_free_cp, 8201da177e4SLinus Torvalds .dump_sense = dasd_fba_dump_sense, 821fc19f381SStefan Haberland .dump_sense_dbf = dasd_fba_dump_sense_dbf, 8221da177e4SLinus Torvalds .fill_info = dasd_fba_fill_info, 8231da177e4SLinus Torvalds }; 8241da177e4SLinus Torvalds 8251da177e4SLinus Torvalds static int __init 8261da177e4SLinus Torvalds dasd_fba_init(void) 8271da177e4SLinus Torvalds { 828736e6ea0SSebastian Ott int ret; 829736e6ea0SSebastian Ott 8301da177e4SLinus Torvalds ASCEBC(dasd_fba_discipline.ebcname, 4); 831709192d5SJan Höppner 832709192d5SJan Höppner dasd_fba_zero_page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); 833709192d5SJan Höppner if (!dasd_fba_zero_page) 834709192d5SJan Höppner return -ENOMEM; 835709192d5SJan Höppner 836736e6ea0SSebastian Ott ret = ccw_driver_register(&dasd_fba_driver); 837736e6ea0SSebastian Ott if (!ret) 838736e6ea0SSebastian Ott wait_for_device_probe(); 839736e6ea0SSebastian Ott 840736e6ea0SSebastian Ott return ret; 8411da177e4SLinus Torvalds } 8421da177e4SLinus Torvalds 8431da177e4SLinus Torvalds static void __exit 8441da177e4SLinus Torvalds dasd_fba_cleanup(void) 8451da177e4SLinus Torvalds { 8461da177e4SLinus Torvalds ccw_driver_unregister(&dasd_fba_driver); 847709192d5SJan Höppner free_page((unsigned long)dasd_fba_zero_page); 8481da177e4SLinus Torvalds } 8491da177e4SLinus Torvalds 8501da177e4SLinus Torvalds module_init(dasd_fba_init); 8511da177e4SLinus Torvalds module_exit(dasd_fba_cleanup); 852