11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * File...........: linux/drivers/s390/block/dasd_eckd.c 31da177e4SLinus Torvalds * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> 41da177e4SLinus Torvalds * Horst Hummel <Horst.Hummel@de.ibm.com> 51da177e4SLinus Torvalds * Carsten Otte <Cotte@de.ibm.com> 61da177e4SLinus Torvalds * Martin Schwidefsky <schwidefsky@de.ibm.com> 71da177e4SLinus Torvalds * Bugreports.to..: <Linux390@de.ibm.com> 81da177e4SLinus Torvalds * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999,2000 91da177e4SLinus Torvalds * 101da177e4SLinus Torvalds */ 111da177e4SLinus Torvalds 121da177e4SLinus Torvalds #include <linux/stddef.h> 131da177e4SLinus Torvalds #include <linux/kernel.h> 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/debug.h> 211da177e4SLinus Torvalds #include <asm/idals.h> 221da177e4SLinus Torvalds #include <asm/ebcdic.h> 231da177e4SLinus Torvalds #include <asm/io.h> 241da177e4SLinus Torvalds #include <asm/todclk.h> 251da177e4SLinus Torvalds #include <asm/uaccess.h> 2640545573SHorst Hummel #include <asm/cio.h> 271da177e4SLinus Torvalds #include <asm/ccwdev.h> 281da177e4SLinus Torvalds 291da177e4SLinus Torvalds #include "dasd_int.h" 301da177e4SLinus Torvalds #include "dasd_eckd.h" 311da177e4SLinus Torvalds 321da177e4SLinus Torvalds #ifdef PRINTK_HEADER 331da177e4SLinus Torvalds #undef PRINTK_HEADER 341da177e4SLinus Torvalds #endif /* PRINTK_HEADER */ 351da177e4SLinus Torvalds #define PRINTK_HEADER "dasd(eckd):" 361da177e4SLinus Torvalds 371da177e4SLinus Torvalds #define ECKD_C0(i) (i->home_bytes) 381da177e4SLinus Torvalds #define ECKD_F(i) (i->formula) 391da177e4SLinus Torvalds #define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\ 401da177e4SLinus Torvalds (i->factors.f_0x02.f1)) 411da177e4SLinus Torvalds #define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\ 421da177e4SLinus Torvalds (i->factors.f_0x02.f2)) 431da177e4SLinus Torvalds #define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\ 441da177e4SLinus Torvalds (i->factors.f_0x02.f3)) 451da177e4SLinus Torvalds #define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0) 461da177e4SLinus Torvalds #define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0) 471da177e4SLinus Torvalds #define ECKD_F6(i) (i->factor6) 481da177e4SLinus Torvalds #define ECKD_F7(i) (i->factor7) 491da177e4SLinus Torvalds #define ECKD_F8(i) (i->factor8) 501da177e4SLinus Torvalds 511da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 521da177e4SLinus Torvalds 531da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline; 541da177e4SLinus Torvalds 551da177e4SLinus Torvalds struct dasd_eckd_private { 561da177e4SLinus Torvalds struct dasd_eckd_characteristics rdc_data; 571da177e4SLinus Torvalds struct dasd_eckd_confdata conf_data; 581da177e4SLinus Torvalds struct dasd_eckd_path path_data; 591da177e4SLinus Torvalds struct eckd_count count_area[5]; 601da177e4SLinus Torvalds int init_cqr_status; 611da177e4SLinus Torvalds int uses_cdl; 621da177e4SLinus Torvalds struct attrib_data_t attrib; /* e.g. cache operations */ 631da177e4SLinus Torvalds }; 641da177e4SLinus Torvalds 651da177e4SLinus Torvalds /* The ccw bus type uses this table to find devices that it sends to 661da177e4SLinus Torvalds * dasd_eckd_probe */ 671da177e4SLinus Torvalds static struct ccw_device_id dasd_eckd_ids[] = { 68d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1}, 69d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2}, 70d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3390, 0), .driver_info = 0x3}, 71d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4}, 72d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5}, 73d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6}, 74d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7}, 75d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8}, 76d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9}, 77d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa}, 781da177e4SLinus Torvalds { /* end of list */ }, 791da177e4SLinus Torvalds }; 801da177e4SLinus Torvalds 811da177e4SLinus Torvalds MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids); 821da177e4SLinus Torvalds 831da177e4SLinus Torvalds static struct ccw_driver dasd_eckd_driver; /* see below */ 841da177e4SLinus Torvalds 851da177e4SLinus Torvalds /* initial attempt at a probe function. this can be simplified once 861da177e4SLinus Torvalds * the other detection code is gone */ 871da177e4SLinus Torvalds static int 881da177e4SLinus Torvalds dasd_eckd_probe (struct ccw_device *cdev) 891da177e4SLinus Torvalds { 901da177e4SLinus Torvalds int ret; 911da177e4SLinus Torvalds 9240545573SHorst Hummel /* set ECKD specific ccw-device options */ 9340545573SHorst Hummel ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE); 9440545573SHorst Hummel if (ret) { 9540545573SHorst Hummel printk(KERN_WARNING 9640545573SHorst Hummel "dasd_eckd_probe: could not set ccw-device options " 9740545573SHorst Hummel "for %s\n", cdev->dev.bus_id); 981da177e4SLinus Torvalds return ret; 9940545573SHorst Hummel } 10040545573SHorst Hummel ret = dasd_generic_probe(cdev, &dasd_eckd_discipline); 10140545573SHorst Hummel return ret; 1021da177e4SLinus Torvalds } 1031da177e4SLinus Torvalds 1041da177e4SLinus Torvalds static int 1051da177e4SLinus Torvalds dasd_eckd_set_online(struct ccw_device *cdev) 1061da177e4SLinus Torvalds { 1071da177e4SLinus Torvalds return dasd_generic_set_online(cdev, &dasd_eckd_discipline); 1081da177e4SLinus Torvalds } 1091da177e4SLinus Torvalds 1101da177e4SLinus Torvalds static struct ccw_driver dasd_eckd_driver = { 1111da177e4SLinus Torvalds .name = "dasd-eckd", 1121da177e4SLinus Torvalds .owner = THIS_MODULE, 1131da177e4SLinus Torvalds .ids = dasd_eckd_ids, 1141da177e4SLinus Torvalds .probe = dasd_eckd_probe, 1151da177e4SLinus Torvalds .remove = dasd_generic_remove, 1161da177e4SLinus Torvalds .set_offline = dasd_generic_set_offline, 1171da177e4SLinus Torvalds .set_online = dasd_eckd_set_online, 1181da177e4SLinus Torvalds .notify = dasd_generic_notify, 1191da177e4SLinus Torvalds }; 1201da177e4SLinus Torvalds 1211da177e4SLinus Torvalds static const int sizes_trk0[] = { 28, 148, 84 }; 1221da177e4SLinus Torvalds #define LABEL_SIZE 140 1231da177e4SLinus Torvalds 1241da177e4SLinus Torvalds static inline unsigned int 1251da177e4SLinus Torvalds round_up_multiple(unsigned int no, unsigned int mult) 1261da177e4SLinus Torvalds { 1271da177e4SLinus Torvalds int rem = no % mult; 1281da177e4SLinus Torvalds return (rem ? no - rem + mult : no); 1291da177e4SLinus Torvalds } 1301da177e4SLinus Torvalds 1311da177e4SLinus Torvalds static inline unsigned int 1321da177e4SLinus Torvalds ceil_quot(unsigned int d1, unsigned int d2) 1331da177e4SLinus Torvalds { 1341da177e4SLinus Torvalds return (d1 + (d2 - 1)) / d2; 1351da177e4SLinus Torvalds } 1361da177e4SLinus Torvalds 1374d284cacSHeiko Carstens static unsigned int 1381da177e4SLinus Torvalds recs_per_track(struct dasd_eckd_characteristics * rdc, 1391da177e4SLinus Torvalds unsigned int kl, unsigned int dl) 1401da177e4SLinus Torvalds { 1411da177e4SLinus Torvalds int dn, kn; 1421da177e4SLinus Torvalds 1431da177e4SLinus Torvalds switch (rdc->dev_type) { 1441da177e4SLinus Torvalds case 0x3380: 1451da177e4SLinus Torvalds if (kl) 1461da177e4SLinus Torvalds return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + 1471da177e4SLinus Torvalds ceil_quot(dl + 12, 32)); 1481da177e4SLinus Torvalds else 1491da177e4SLinus Torvalds return 1499 / (15 + ceil_quot(dl + 12, 32)); 1501da177e4SLinus Torvalds case 0x3390: 1511da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1521da177e4SLinus Torvalds if (kl) { 1531da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1541da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + 1551da177e4SLinus Torvalds 9 + ceil_quot(dl + 6 * dn, 34)); 1561da177e4SLinus Torvalds } else 1571da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); 1581da177e4SLinus Torvalds case 0x9345: 1591da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1601da177e4SLinus Torvalds if (kl) { 1611da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1621da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + 1631da177e4SLinus Torvalds ceil_quot(dl + 6 * dn, 34)); 1641da177e4SLinus Torvalds } else 1651da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); 1661da177e4SLinus Torvalds } 1671da177e4SLinus Torvalds return 0; 1681da177e4SLinus Torvalds } 1691da177e4SLinus Torvalds 1704d284cacSHeiko Carstens static int 1711da177e4SLinus Torvalds check_XRC (struct ccw1 *de_ccw, 1721da177e4SLinus Torvalds struct DE_eckd_data *data, 1731da177e4SLinus Torvalds struct dasd_device *device) 1741da177e4SLinus Torvalds { 1751da177e4SLinus Torvalds struct dasd_eckd_private *private; 176d54853efSMartin Schwidefsky int rc; 1771da177e4SLinus Torvalds 1781da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 179d54853efSMartin Schwidefsky if (!private->rdc_data.facilities.XRC_supported) 180d54853efSMartin Schwidefsky return 0; 1811da177e4SLinus Torvalds 1821da177e4SLinus Torvalds /* switch on System Time Stamp - needed for XRC Support */ 1831da177e4SLinus Torvalds data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ 1841da177e4SLinus Torvalds data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ 1851da177e4SLinus Torvalds 186d54853efSMartin Schwidefsky rc = get_sync_clock(&data->ep_sys_time); 187d54853efSMartin Schwidefsky /* Ignore return code if sync clock is switched off. */ 188d54853efSMartin Schwidefsky if (rc == -ENOSYS || rc == -EACCES) 189d54853efSMartin Schwidefsky rc = 0; 1901da177e4SLinus Torvalds 1911da177e4SLinus Torvalds de_ccw->count = sizeof (struct DE_eckd_data); 1921da177e4SLinus Torvalds de_ccw->flags |= CCW_FLAG_SLI; 193d54853efSMartin Schwidefsky return rc; 1941da177e4SLinus Torvalds } 1951da177e4SLinus Torvalds 1964d284cacSHeiko Carstens static int 1971da177e4SLinus Torvalds define_extent(struct ccw1 * ccw, struct DE_eckd_data * data, int trk, 1981da177e4SLinus Torvalds int totrk, int cmd, struct dasd_device * device) 1991da177e4SLinus Torvalds { 2001da177e4SLinus Torvalds struct dasd_eckd_private *private; 2011da177e4SLinus Torvalds struct ch_t geo, beg, end; 202d54853efSMartin Schwidefsky int rc = 0; 2031da177e4SLinus Torvalds 2041da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 2051da177e4SLinus Torvalds 2061da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; 2071da177e4SLinus Torvalds ccw->flags = 0; 2081da177e4SLinus Torvalds ccw->count = 16; 2091da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 2101da177e4SLinus Torvalds 2111da177e4SLinus Torvalds memset(data, 0, sizeof (struct DE_eckd_data)); 2121da177e4SLinus Torvalds switch (cmd) { 2131da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 2141da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 2151da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 2161da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 2171da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 2181da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 2191da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 2201da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 2211da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_COUNT: 2221da177e4SLinus Torvalds data->mask.perm = 0x1; 2231da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 2241da177e4SLinus Torvalds break; 2251da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 2261da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 2271da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 2281da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 2291da177e4SLinus Torvalds data->mask.perm = 0x02; 2301da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 231d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2321da177e4SLinus Torvalds break; 2331da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 2341da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 2351da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 236d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2371da177e4SLinus Torvalds break; 2381da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 2391da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 2401da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 2411da177e4SLinus Torvalds data->mask.perm = 0x3; 2421da177e4SLinus Torvalds data->mask.auth = 0x1; 2431da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 244d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2451da177e4SLinus Torvalds break; 2461da177e4SLinus Torvalds default: 2471da177e4SLinus Torvalds DEV_MESSAGE(KERN_ERR, device, "unknown opcode 0x%x", cmd); 2481da177e4SLinus Torvalds break; 2491da177e4SLinus Torvalds } 2501da177e4SLinus Torvalds 2511da177e4SLinus Torvalds data->attributes.mode = 0x3; /* ECKD */ 2521da177e4SLinus Torvalds 2531da177e4SLinus Torvalds if ((private->rdc_data.cu_type == 0x2105 || 2541da177e4SLinus Torvalds private->rdc_data.cu_type == 0x2107 || 2551da177e4SLinus Torvalds private->rdc_data.cu_type == 0x1750) 2561da177e4SLinus Torvalds && !(private->uses_cdl && trk < 2)) 2571da177e4SLinus Torvalds data->ga_extended |= 0x40; /* Regular Data Format Mode */ 2581da177e4SLinus Torvalds 2591da177e4SLinus Torvalds geo.cyl = private->rdc_data.no_cyl; 2601da177e4SLinus Torvalds geo.head = private->rdc_data.trk_per_cyl; 2611da177e4SLinus Torvalds beg.cyl = trk / geo.head; 2621da177e4SLinus Torvalds beg.head = trk % geo.head; 2631da177e4SLinus Torvalds end.cyl = totrk / geo.head; 2641da177e4SLinus Torvalds end.head = totrk % geo.head; 2651da177e4SLinus Torvalds 2661da177e4SLinus Torvalds /* check for sequential prestage - enhance cylinder range */ 2671da177e4SLinus Torvalds if (data->attributes.operation == DASD_SEQ_PRESTAGE || 2681da177e4SLinus Torvalds data->attributes.operation == DASD_SEQ_ACCESS) { 2691da177e4SLinus Torvalds 2701da177e4SLinus Torvalds if (end.cyl + private->attrib.nr_cyl < geo.cyl) 2711da177e4SLinus Torvalds end.cyl += private->attrib.nr_cyl; 2721da177e4SLinus Torvalds else 2731da177e4SLinus Torvalds end.cyl = (geo.cyl - 1); 2741da177e4SLinus Torvalds } 2751da177e4SLinus Torvalds 2761da177e4SLinus Torvalds data->beg_ext.cyl = beg.cyl; 2771da177e4SLinus Torvalds data->beg_ext.head = beg.head; 2781da177e4SLinus Torvalds data->end_ext.cyl = end.cyl; 2791da177e4SLinus Torvalds data->end_ext.head = end.head; 280d54853efSMartin Schwidefsky return rc; 2811da177e4SLinus Torvalds } 2821da177e4SLinus Torvalds 2834d284cacSHeiko Carstens static void 2841da177e4SLinus Torvalds locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, int trk, 2851da177e4SLinus Torvalds int rec_on_trk, int no_rec, int cmd, 2861da177e4SLinus Torvalds struct dasd_device * device, int reclen) 2871da177e4SLinus Torvalds { 2881da177e4SLinus Torvalds struct dasd_eckd_private *private; 2891da177e4SLinus Torvalds int sector; 2901da177e4SLinus Torvalds int dn, d; 2911da177e4SLinus Torvalds 2921da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 2931da177e4SLinus Torvalds 2941da177e4SLinus Torvalds DBF_DEV_EVENT(DBF_INFO, device, 2951da177e4SLinus Torvalds "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", 2961da177e4SLinus Torvalds trk, rec_on_trk, no_rec, cmd, reclen); 2971da177e4SLinus Torvalds 2981da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; 2991da177e4SLinus Torvalds ccw->flags = 0; 3001da177e4SLinus Torvalds ccw->count = 16; 3011da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 3021da177e4SLinus Torvalds 3031da177e4SLinus Torvalds memset(data, 0, sizeof (struct LO_eckd_data)); 3041da177e4SLinus Torvalds sector = 0; 3051da177e4SLinus Torvalds if (rec_on_trk) { 3061da177e4SLinus Torvalds switch (private->rdc_data.dev_type) { 3071da177e4SLinus Torvalds case 0x3390: 3081da177e4SLinus Torvalds dn = ceil_quot(reclen + 6, 232); 3091da177e4SLinus Torvalds d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 3101da177e4SLinus Torvalds sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 3111da177e4SLinus Torvalds break; 3121da177e4SLinus Torvalds case 0x3380: 3131da177e4SLinus Torvalds d = 7 + ceil_quot(reclen + 12, 32); 3141da177e4SLinus Torvalds sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 3151da177e4SLinus Torvalds break; 3161da177e4SLinus Torvalds } 3171da177e4SLinus Torvalds } 3181da177e4SLinus Torvalds data->sector = sector; 3191da177e4SLinus Torvalds data->count = no_rec; 3201da177e4SLinus Torvalds switch (cmd) { 3211da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 3221da177e4SLinus Torvalds data->operation.orientation = 0x3; 3231da177e4SLinus Torvalds data->operation.operation = 0x03; 3241da177e4SLinus Torvalds break; 3251da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 3261da177e4SLinus Torvalds data->operation.orientation = 0x3; 3271da177e4SLinus Torvalds data->operation.operation = 0x16; 3281da177e4SLinus Torvalds break; 3291da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 3301da177e4SLinus Torvalds data->operation.orientation = 0x1; 3311da177e4SLinus Torvalds data->operation.operation = 0x03; 3321da177e4SLinus Torvalds data->count++; 3331da177e4SLinus Torvalds break; 3341da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 3351da177e4SLinus Torvalds data->operation.orientation = 0x3; 3361da177e4SLinus Torvalds data->operation.operation = 0x16; 3371da177e4SLinus Torvalds data->count++; 3381da177e4SLinus Torvalds break; 3391da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 3401da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 3411da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 3421da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 3431da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 3441da177e4SLinus Torvalds data->length = reclen; 3451da177e4SLinus Torvalds data->operation.operation = 0x01; 3461da177e4SLinus Torvalds break; 3471da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 3481da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 3491da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 3501da177e4SLinus Torvalds data->length = reclen; 3511da177e4SLinus Torvalds data->operation.operation = 0x03; 3521da177e4SLinus Torvalds break; 3531da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 3541da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 3551da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 3561da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 3571da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 3581da177e4SLinus Torvalds data->length = reclen; 3591da177e4SLinus Torvalds data->operation.operation = 0x06; 3601da177e4SLinus Torvalds break; 3611da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 3621da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 3631da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 3641da177e4SLinus Torvalds data->length = reclen; 3651da177e4SLinus Torvalds data->operation.operation = 0x16; 3661da177e4SLinus Torvalds break; 3671da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_COUNT: 3681da177e4SLinus Torvalds data->operation.operation = 0x06; 3691da177e4SLinus Torvalds break; 3701da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 3711da177e4SLinus Torvalds data->length = reclen; 3721da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 3731da177e4SLinus Torvalds data->operation.operation = 0x0b; 3741da177e4SLinus Torvalds break; 3751da177e4SLinus Torvalds default: 3761da177e4SLinus Torvalds DEV_MESSAGE(KERN_ERR, device, "unknown opcode 0x%x", cmd); 3771da177e4SLinus Torvalds } 3781da177e4SLinus Torvalds data->seek_addr.cyl = data->search_arg.cyl = 3791da177e4SLinus Torvalds trk / private->rdc_data.trk_per_cyl; 3801da177e4SLinus Torvalds data->seek_addr.head = data->search_arg.head = 3811da177e4SLinus Torvalds trk % private->rdc_data.trk_per_cyl; 3821da177e4SLinus Torvalds data->search_arg.record = rec_on_trk; 3831da177e4SLinus Torvalds } 3841da177e4SLinus Torvalds 3851da177e4SLinus Torvalds /* 3861da177e4SLinus Torvalds * Returns 1 if the block is one of the special blocks that needs 3871da177e4SLinus Torvalds * to get read/written with the KD variant of the command. 3881da177e4SLinus Torvalds * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and 3891da177e4SLinus Torvalds * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. 3901da177e4SLinus Torvalds * Luckily the KD variants differ only by one bit (0x08) from the 3911da177e4SLinus Torvalds * normal variant. So don't wonder about code like: 3921da177e4SLinus Torvalds * if (dasd_eckd_cdl_special(blk_per_trk, recid)) 3931da177e4SLinus Torvalds * ccw->cmd_code |= 0x8; 3941da177e4SLinus Torvalds */ 3951da177e4SLinus Torvalds static inline int 3961da177e4SLinus Torvalds dasd_eckd_cdl_special(int blk_per_trk, int recid) 3971da177e4SLinus Torvalds { 3981da177e4SLinus Torvalds if (recid < 3) 3991da177e4SLinus Torvalds return 1; 4001da177e4SLinus Torvalds if (recid < blk_per_trk) 4011da177e4SLinus Torvalds return 0; 4021da177e4SLinus Torvalds if (recid < 2 * blk_per_trk) 4031da177e4SLinus Torvalds return 1; 4041da177e4SLinus Torvalds return 0; 4051da177e4SLinus Torvalds } 4061da177e4SLinus Torvalds 4071da177e4SLinus Torvalds /* 4081da177e4SLinus Torvalds * Returns the record size for the special blocks of the cdl format. 4091da177e4SLinus Torvalds * Only returns something useful if dasd_eckd_cdl_special is true 4101da177e4SLinus Torvalds * for the recid. 4111da177e4SLinus Torvalds */ 4121da177e4SLinus Torvalds static inline int 4131da177e4SLinus Torvalds dasd_eckd_cdl_reclen(int recid) 4141da177e4SLinus Torvalds { 4151da177e4SLinus Torvalds if (recid < 3) 4161da177e4SLinus Torvalds return sizes_trk0[recid]; 4171da177e4SLinus Torvalds return LABEL_SIZE; 4181da177e4SLinus Torvalds } 4191da177e4SLinus Torvalds 4203d052595SHorst Hummel /* 4213d052595SHorst Hummel * Generate device unique id that specifies the physical device. 4223d052595SHorst Hummel */ 4233d052595SHorst Hummel static int 4243d052595SHorst Hummel dasd_eckd_generate_uid(struct dasd_device *device, struct dasd_uid *uid) 4253d052595SHorst Hummel { 4263d052595SHorst Hummel struct dasd_eckd_private *private; 4273d052595SHorst Hummel struct dasd_eckd_confdata *confdata; 4283d052595SHorst Hummel 4293d052595SHorst Hummel private = (struct dasd_eckd_private *) device->private; 4303d052595SHorst Hummel if (!private) 4313d052595SHorst Hummel return -ENODEV; 4323d052595SHorst Hummel confdata = &private->conf_data; 4333d052595SHorst Hummel if (!confdata) 4343d052595SHorst Hummel return -ENODEV; 4353d052595SHorst Hummel 4363d052595SHorst Hummel memset(uid, 0, sizeof(struct dasd_uid)); 437d0710c7cSHorst Hummel memcpy(uid->vendor, confdata->ned1.HDA_manufacturer, 4383d052595SHorst Hummel sizeof(uid->vendor) - 1); 4393d052595SHorst Hummel EBCASC(uid->vendor, sizeof(uid->vendor) - 1); 440d0710c7cSHorst Hummel memcpy(uid->serial, confdata->ned1.HDA_location, 4413d052595SHorst Hummel sizeof(uid->serial) - 1); 4423d052595SHorst Hummel EBCASC(uid->serial, sizeof(uid->serial) - 1); 4433d052595SHorst Hummel uid->ssid = confdata->neq.subsystemID; 4443d052595SHorst Hummel if (confdata->ned2.sneq.flags == 0x40) { 4453d052595SHorst Hummel uid->alias = 1; 4463d052595SHorst Hummel uid->unit_addr = confdata->ned2.sneq.base_unit_addr; 4473d052595SHorst Hummel } else 4483d052595SHorst Hummel uid->unit_addr = confdata->ned1.unit_addr; 4493d052595SHorst Hummel 4503d052595SHorst Hummel return 0; 4513d052595SHorst Hummel } 4523d052595SHorst Hummel 453763968e2SHeiko Carstens static struct dasd_ccw_req *dasd_eckd_build_rcd_lpm(struct dasd_device *device, 45417283b56SCornelia Huck void *rcd_buffer, 45517283b56SCornelia Huck struct ciw *ciw, __u8 lpm) 45617283b56SCornelia Huck { 45717283b56SCornelia Huck struct dasd_ccw_req *cqr; 45817283b56SCornelia Huck struct ccw1 *ccw; 45917283b56SCornelia Huck 46017283b56SCornelia Huck cqr = dasd_smalloc_request("ECKD", 1 /* RCD */, ciw->count, device); 46117283b56SCornelia Huck 46217283b56SCornelia Huck if (IS_ERR(cqr)) { 46317283b56SCornelia Huck DEV_MESSAGE(KERN_WARNING, device, "%s", 46417283b56SCornelia Huck "Could not allocate RCD request"); 46517283b56SCornelia Huck return cqr; 46617283b56SCornelia Huck } 46717283b56SCornelia Huck 46817283b56SCornelia Huck ccw = cqr->cpaddr; 46917283b56SCornelia Huck ccw->cmd_code = ciw->cmd; 47017283b56SCornelia Huck ccw->cda = (__u32)(addr_t)rcd_buffer; 47117283b56SCornelia Huck ccw->count = ciw->count; 47217283b56SCornelia Huck 47317283b56SCornelia Huck cqr->device = device; 47417283b56SCornelia Huck cqr->expires = 10*HZ; 47517283b56SCornelia Huck cqr->lpm = lpm; 47617283b56SCornelia Huck clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 47717283b56SCornelia Huck cqr->retries = 2; 47817283b56SCornelia Huck cqr->buildclk = get_clock(); 47917283b56SCornelia Huck cqr->status = DASD_CQR_FILLED; 48017283b56SCornelia Huck return cqr; 48117283b56SCornelia Huck } 48217283b56SCornelia Huck 48317283b56SCornelia Huck static int dasd_eckd_read_conf_lpm(struct dasd_device *device, 48417283b56SCornelia Huck void **rcd_buffer, 48517283b56SCornelia Huck int *rcd_buffer_size, __u8 lpm) 48617283b56SCornelia Huck { 48717283b56SCornelia Huck struct ciw *ciw; 48817283b56SCornelia Huck char *rcd_buf = NULL; 48917283b56SCornelia Huck int ret; 49017283b56SCornelia Huck struct dasd_ccw_req *cqr; 49117283b56SCornelia Huck 49217283b56SCornelia Huck /* 49317283b56SCornelia Huck * scan for RCD command in extended SenseID data 49417283b56SCornelia Huck */ 49517283b56SCornelia Huck ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 49617283b56SCornelia Huck if (!ciw || ciw->cmd == 0) { 49717283b56SCornelia Huck ret = -EOPNOTSUPP; 49817283b56SCornelia Huck goto out_error; 49917283b56SCornelia Huck } 50017283b56SCornelia Huck rcd_buf = kzalloc(ciw->count, GFP_KERNEL | GFP_DMA); 50117283b56SCornelia Huck if (!rcd_buf) { 50217283b56SCornelia Huck ret = -ENOMEM; 50317283b56SCornelia Huck goto out_error; 50417283b56SCornelia Huck } 50517283b56SCornelia Huck cqr = dasd_eckd_build_rcd_lpm(device, rcd_buf, ciw, lpm); 50617283b56SCornelia Huck if (IS_ERR(cqr)) { 50717283b56SCornelia Huck ret = PTR_ERR(cqr); 50817283b56SCornelia Huck goto out_error; 50917283b56SCornelia Huck } 51017283b56SCornelia Huck ret = dasd_sleep_on(cqr); 51117283b56SCornelia Huck /* 51217283b56SCornelia Huck * on success we update the user input parms 51317283b56SCornelia Huck */ 51417283b56SCornelia Huck dasd_sfree_request(cqr, cqr->device); 51517283b56SCornelia Huck if (ret) 51617283b56SCornelia Huck goto out_error; 51717283b56SCornelia Huck 51817283b56SCornelia Huck *rcd_buffer_size = ciw->count; 51917283b56SCornelia Huck *rcd_buffer = rcd_buf; 52017283b56SCornelia Huck return 0; 52117283b56SCornelia Huck out_error: 52217283b56SCornelia Huck kfree(rcd_buf); 52317283b56SCornelia Huck *rcd_buffer = NULL; 52417283b56SCornelia Huck *rcd_buffer_size = 0; 52517283b56SCornelia Huck return ret; 52617283b56SCornelia Huck } 52717283b56SCornelia Huck 5281da177e4SLinus Torvalds static int 5291da177e4SLinus Torvalds dasd_eckd_read_conf(struct dasd_device *device) 5301da177e4SLinus Torvalds { 5311da177e4SLinus Torvalds void *conf_data; 5321da177e4SLinus Torvalds int conf_len, conf_data_saved; 5331da177e4SLinus Torvalds int rc; 5341da177e4SLinus Torvalds __u8 lpm; 5351da177e4SLinus Torvalds struct dasd_eckd_private *private; 5361da177e4SLinus Torvalds struct dasd_eckd_path *path_data; 5371da177e4SLinus Torvalds 5381da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 5391da177e4SLinus Torvalds path_data = (struct dasd_eckd_path *) &private->path_data; 5401da177e4SLinus Torvalds path_data->opm = ccw_device_get_path_mask(device->cdev); 5411da177e4SLinus Torvalds lpm = 0x80; 5421da177e4SLinus Torvalds conf_data_saved = 0; 5431da177e4SLinus Torvalds 5441da177e4SLinus Torvalds /* get configuration data per operational path */ 5451da177e4SLinus Torvalds for (lpm = 0x80; lpm; lpm>>= 1) { 5461da177e4SLinus Torvalds if (lpm & path_data->opm){ 54717283b56SCornelia Huck rc = dasd_eckd_read_conf_lpm(device, &conf_data, 5481da177e4SLinus Torvalds &conf_len, lpm); 5491da177e4SLinus Torvalds if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ 5501da177e4SLinus Torvalds MESSAGE(KERN_WARNING, 5511da177e4SLinus Torvalds "Read configuration data returned " 5521da177e4SLinus Torvalds "error %d", rc); 5531da177e4SLinus Torvalds return rc; 5541da177e4SLinus Torvalds } 5551da177e4SLinus Torvalds if (conf_data == NULL) { 5561da177e4SLinus Torvalds MESSAGE(KERN_WARNING, "%s", "No configuration " 5571da177e4SLinus Torvalds "data retrieved"); 558d133a960SGabriel Craciunescu continue; /* no error */ 5591da177e4SLinus Torvalds } 5601da177e4SLinus Torvalds if (conf_len != sizeof (struct dasd_eckd_confdata)) { 5611da177e4SLinus Torvalds MESSAGE(KERN_WARNING, 5621da177e4SLinus Torvalds "sizes of configuration data mismatch" 5631da177e4SLinus Torvalds "%d (read) vs %ld (expected)", 5641da177e4SLinus Torvalds conf_len, 5651da177e4SLinus Torvalds sizeof (struct dasd_eckd_confdata)); 5661da177e4SLinus Torvalds kfree(conf_data); 567d133a960SGabriel Craciunescu continue; /* no error */ 5681da177e4SLinus Torvalds } 5691da177e4SLinus Torvalds /* save first valid configuration data */ 5701da177e4SLinus Torvalds if (!conf_data_saved){ 5711da177e4SLinus Torvalds memcpy(&private->conf_data, conf_data, 5721da177e4SLinus Torvalds sizeof (struct dasd_eckd_confdata)); 5731da177e4SLinus Torvalds conf_data_saved++; 5741da177e4SLinus Torvalds } 5751da177e4SLinus Torvalds switch (((char *)conf_data)[242] & 0x07){ 5761da177e4SLinus Torvalds case 0x02: 5771da177e4SLinus Torvalds path_data->npm |= lpm; 5781da177e4SLinus Torvalds break; 5791da177e4SLinus Torvalds case 0x03: 5801da177e4SLinus Torvalds path_data->ppm |= lpm; 5811da177e4SLinus Torvalds break; 5821da177e4SLinus Torvalds } 5831da177e4SLinus Torvalds kfree(conf_data); 5841da177e4SLinus Torvalds } 5851da177e4SLinus Torvalds } 5861da177e4SLinus Torvalds return 0; 5871da177e4SLinus Torvalds } 5881da177e4SLinus Torvalds 5893d052595SHorst Hummel /* 59040545573SHorst Hummel * Build CP for Perform Subsystem Function - SSC. 59140545573SHorst Hummel */ 5922b67fc46SHeiko Carstens static struct dasd_ccw_req * 59340545573SHorst Hummel dasd_eckd_build_psf_ssc(struct dasd_device *device) 59440545573SHorst Hummel { 59540545573SHorst Hummel struct dasd_ccw_req *cqr; 59640545573SHorst Hummel struct dasd_psf_ssc_data *psf_ssc_data; 59740545573SHorst Hummel struct ccw1 *ccw; 59840545573SHorst Hummel 59940545573SHorst Hummel cqr = dasd_smalloc_request("ECKD", 1 /* PSF */ , 60040545573SHorst Hummel sizeof(struct dasd_psf_ssc_data), 60140545573SHorst Hummel device); 60240545573SHorst Hummel 60340545573SHorst Hummel if (IS_ERR(cqr)) { 60440545573SHorst Hummel DEV_MESSAGE(KERN_WARNING, device, "%s", 60540545573SHorst Hummel "Could not allocate PSF-SSC request"); 60640545573SHorst Hummel return cqr; 60740545573SHorst Hummel } 60840545573SHorst Hummel psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 60940545573SHorst Hummel psf_ssc_data->order = PSF_ORDER_SSC; 61040545573SHorst Hummel psf_ssc_data->suborder = 0x08; 61140545573SHorst Hummel 61240545573SHorst Hummel ccw = cqr->cpaddr; 61340545573SHorst Hummel ccw->cmd_code = DASD_ECKD_CCW_PSF; 61440545573SHorst Hummel ccw->cda = (__u32)(addr_t)psf_ssc_data; 61540545573SHorst Hummel ccw->count = 66; 61640545573SHorst Hummel 61740545573SHorst Hummel cqr->device = device; 61840545573SHorst Hummel cqr->expires = 10*HZ; 61940545573SHorst Hummel cqr->buildclk = get_clock(); 62040545573SHorst Hummel cqr->status = DASD_CQR_FILLED; 62140545573SHorst Hummel return cqr; 62240545573SHorst Hummel } 62340545573SHorst Hummel 62440545573SHorst Hummel /* 62540545573SHorst Hummel * Perform Subsystem Function. 62640545573SHorst Hummel * It is necessary to trigger CIO for channel revalidation since this 62740545573SHorst Hummel * call might change behaviour of DASD devices. 62840545573SHorst Hummel */ 62940545573SHorst Hummel static int 63040545573SHorst Hummel dasd_eckd_psf_ssc(struct dasd_device *device) 63140545573SHorst Hummel { 63240545573SHorst Hummel struct dasd_ccw_req *cqr; 63340545573SHorst Hummel int rc; 63440545573SHorst Hummel 63540545573SHorst Hummel cqr = dasd_eckd_build_psf_ssc(device); 63640545573SHorst Hummel if (IS_ERR(cqr)) 63740545573SHorst Hummel return PTR_ERR(cqr); 63840545573SHorst Hummel 63940545573SHorst Hummel rc = dasd_sleep_on(cqr); 64040545573SHorst Hummel if (!rc) 64140545573SHorst Hummel /* trigger CIO to reprobe devices */ 64240545573SHorst Hummel css_schedule_reprobe(); 64340545573SHorst Hummel dasd_sfree_request(cqr, cqr->device); 64440545573SHorst Hummel return rc; 64540545573SHorst Hummel } 64640545573SHorst Hummel 64740545573SHorst Hummel /* 64840545573SHorst Hummel * Valide storage server of current device. 64940545573SHorst Hummel */ 65040545573SHorst Hummel static int 6518e79a441SHorst Hummel dasd_eckd_validate_server(struct dasd_device *device, struct dasd_uid *uid) 65240545573SHorst Hummel { 65340545573SHorst Hummel int rc; 65440545573SHorst Hummel 65540545573SHorst Hummel /* Currently PAV is the only reason to 'validate' server on LPAR */ 65640545573SHorst Hummel if (dasd_nopav || MACHINE_IS_VM) 65740545573SHorst Hummel return 0; 65840545573SHorst Hummel 65940545573SHorst Hummel rc = dasd_eckd_psf_ssc(device); 66040545573SHorst Hummel /* may be requested feature is not available on server, 66140545573SHorst Hummel * therefore just report error and go ahead */ 66240545573SHorst Hummel DEV_MESSAGE(KERN_INFO, device, 6638e79a441SHorst Hummel "PSF-SSC on storage subsystem %s.%s.%04x returned rc=%d", 6648e79a441SHorst Hummel uid->vendor, uid->serial, uid->ssid, rc); 66540545573SHorst Hummel /* RE-Read Configuration Data */ 66640545573SHorst Hummel return dasd_eckd_read_conf(device); 66740545573SHorst Hummel } 66840545573SHorst Hummel 66940545573SHorst Hummel /* 6703d052595SHorst Hummel * Check device characteristics. 6713d052595SHorst Hummel * If the device is accessible using ECKD discipline, the device is enabled. 6723d052595SHorst Hummel */ 6731da177e4SLinus Torvalds static int 6741da177e4SLinus Torvalds dasd_eckd_check_characteristics(struct dasd_device *device) 6751da177e4SLinus Torvalds { 6761da177e4SLinus Torvalds struct dasd_eckd_private *private; 6773d052595SHorst Hummel struct dasd_uid uid; 6781da177e4SLinus Torvalds void *rdc_data; 6791da177e4SLinus Torvalds int rc; 6801da177e4SLinus Torvalds 6811da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 6821da177e4SLinus Torvalds if (private == NULL) { 683138c014dSHorst Hummel private = kzalloc(sizeof(struct dasd_eckd_private), 6841da177e4SLinus Torvalds GFP_KERNEL | GFP_DMA); 6851da177e4SLinus Torvalds if (private == NULL) { 6861da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 6871da177e4SLinus Torvalds "memory allocation failed for private " 6881da177e4SLinus Torvalds "data"); 6891da177e4SLinus Torvalds return -ENOMEM; 6901da177e4SLinus Torvalds } 6911da177e4SLinus Torvalds device->private = (void *) private; 6921da177e4SLinus Torvalds } 6931da177e4SLinus Torvalds /* Invalidate status of initial analysis. */ 6941da177e4SLinus Torvalds private->init_cqr_status = -1; 6951da177e4SLinus Torvalds /* Set default cache operations. */ 6961da177e4SLinus Torvalds private->attrib.operation = DASD_NORMAL_CACHE; 6971da177e4SLinus Torvalds private->attrib.nr_cyl = 0; 6981da177e4SLinus Torvalds 69940545573SHorst Hummel /* Read Configuration Data */ 70040545573SHorst Hummel rc = dasd_eckd_read_conf(device); 70140545573SHorst Hummel if (rc) 70240545573SHorst Hummel return rc; 70340545573SHorst Hummel 70440545573SHorst Hummel /* Generate device unique id and register in devmap */ 70540545573SHorst Hummel rc = dasd_eckd_generate_uid(device, &uid); 70640545573SHorst Hummel if (rc) 70740545573SHorst Hummel return rc; 70840545573SHorst Hummel rc = dasd_set_uid(device->cdev, &uid); 70940545573SHorst Hummel if (rc == 1) /* new server found */ 7108e79a441SHorst Hummel rc = dasd_eckd_validate_server(device, &uid); 71140545573SHorst Hummel if (rc) 71240545573SHorst Hummel return rc; 71340545573SHorst Hummel 7141da177e4SLinus Torvalds /* Read Device Characteristics */ 7151da177e4SLinus Torvalds rdc_data = (void *) &(private->rdc_data); 7163d052595SHorst Hummel memset(rdc_data, 0, sizeof(rdc_data)); 71717283b56SCornelia Huck rc = dasd_generic_read_dev_chars(device, "ECKD", &rdc_data, 64); 71840545573SHorst Hummel if (rc) 7191da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, 72040545573SHorst Hummel "Read device characteristics returned " 72140545573SHorst Hummel "rc=%d", rc); 7221da177e4SLinus Torvalds 7231da177e4SLinus Torvalds DEV_MESSAGE(KERN_INFO, device, 7241da177e4SLinus Torvalds "%04X/%02X(CU:%04X/%02X) Cyl:%d Head:%d Sec:%d", 7251da177e4SLinus Torvalds private->rdc_data.dev_type, 7261da177e4SLinus Torvalds private->rdc_data.dev_model, 7271da177e4SLinus Torvalds private->rdc_data.cu_type, 7281da177e4SLinus Torvalds private->rdc_data.cu_model.model, 7291da177e4SLinus Torvalds private->rdc_data.no_cyl, 7301da177e4SLinus Torvalds private->rdc_data.trk_per_cyl, 7311da177e4SLinus Torvalds private->rdc_data.sec_per_trk); 7323d052595SHorst Hummel return rc; 7331da177e4SLinus Torvalds } 7341da177e4SLinus Torvalds 7351da177e4SLinus Torvalds static struct dasd_ccw_req * 7361da177e4SLinus Torvalds dasd_eckd_analysis_ccw(struct dasd_device *device) 7371da177e4SLinus Torvalds { 7381da177e4SLinus Torvalds struct dasd_eckd_private *private; 7391da177e4SLinus Torvalds struct eckd_count *count_data; 7401da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 7411da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 7421da177e4SLinus Torvalds struct ccw1 *ccw; 7431da177e4SLinus Torvalds int cplength, datasize; 7441da177e4SLinus Torvalds int i; 7451da177e4SLinus Torvalds 7461da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 7471da177e4SLinus Torvalds 7481da177e4SLinus Torvalds cplength = 8; 7491da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 7501da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 7511da177e4SLinus Torvalds cplength, datasize, device); 7521da177e4SLinus Torvalds if (IS_ERR(cqr)) 7531da177e4SLinus Torvalds return cqr; 7541da177e4SLinus Torvalds ccw = cqr->cpaddr; 7551da177e4SLinus Torvalds /* Define extent for the first 3 tracks. */ 7561da177e4SLinus Torvalds define_extent(ccw++, cqr->data, 0, 2, 7571da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device); 7581da177e4SLinus Torvalds LO_data = cqr->data + sizeof (struct DE_eckd_data); 7591da177e4SLinus Torvalds /* Locate record for the first 4 records on track 0. */ 7601da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 7611da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 0, 0, 4, 7621da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 7631da177e4SLinus Torvalds 7641da177e4SLinus Torvalds count_data = private->count_area; 7651da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 7661da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 7671da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 7681da177e4SLinus Torvalds ccw->flags = 0; 7691da177e4SLinus Torvalds ccw->count = 8; 7701da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 7711da177e4SLinus Torvalds ccw++; 7721da177e4SLinus Torvalds count_data++; 7731da177e4SLinus Torvalds } 7741da177e4SLinus Torvalds 7751da177e4SLinus Torvalds /* Locate record for the first record on track 2. */ 7761da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 7771da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 2, 0, 1, 7781da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 7791da177e4SLinus Torvalds /* Read count ccw. */ 7801da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 7811da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 7821da177e4SLinus Torvalds ccw->flags = 0; 7831da177e4SLinus Torvalds ccw->count = 8; 7841da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 7851da177e4SLinus Torvalds 7861da177e4SLinus Torvalds cqr->device = device; 7871da177e4SLinus Torvalds cqr->retries = 0; 7881da177e4SLinus Torvalds cqr->buildclk = get_clock(); 7891da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 7901da177e4SLinus Torvalds return cqr; 7911da177e4SLinus Torvalds } 7921da177e4SLinus Torvalds 7931da177e4SLinus Torvalds /* 7941da177e4SLinus Torvalds * This is the callback function for the init_analysis cqr. It saves 7951da177e4SLinus Torvalds * the status of the initial analysis ccw before it frees it and kicks 7961da177e4SLinus Torvalds * the device to continue the startup sequence. This will call 7971da177e4SLinus Torvalds * dasd_eckd_do_analysis again (if the devices has not been marked 7981da177e4SLinus Torvalds * for deletion in the meantime). 7991da177e4SLinus Torvalds */ 8001da177e4SLinus Torvalds static void 8011da177e4SLinus Torvalds dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, void *data) 8021da177e4SLinus Torvalds { 8031da177e4SLinus Torvalds struct dasd_eckd_private *private; 8041da177e4SLinus Torvalds struct dasd_device *device; 8051da177e4SLinus Torvalds 8061da177e4SLinus Torvalds device = init_cqr->device; 8071da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 8081da177e4SLinus Torvalds private->init_cqr_status = init_cqr->status; 8091da177e4SLinus Torvalds dasd_sfree_request(init_cqr, device); 8101da177e4SLinus Torvalds dasd_kick_device(device); 8111da177e4SLinus Torvalds } 8121da177e4SLinus Torvalds 8131da177e4SLinus Torvalds static int 8141da177e4SLinus Torvalds dasd_eckd_start_analysis(struct dasd_device *device) 8151da177e4SLinus Torvalds { 8161da177e4SLinus Torvalds struct dasd_eckd_private *private; 8171da177e4SLinus Torvalds struct dasd_ccw_req *init_cqr; 8181da177e4SLinus Torvalds 8191da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 8201da177e4SLinus Torvalds init_cqr = dasd_eckd_analysis_ccw(device); 8211da177e4SLinus Torvalds if (IS_ERR(init_cqr)) 8221da177e4SLinus Torvalds return PTR_ERR(init_cqr); 8231da177e4SLinus Torvalds init_cqr->callback = dasd_eckd_analysis_callback; 8241da177e4SLinus Torvalds init_cqr->callback_data = NULL; 8251da177e4SLinus Torvalds init_cqr->expires = 5*HZ; 8261da177e4SLinus Torvalds dasd_add_request_head(init_cqr); 8271da177e4SLinus Torvalds return -EAGAIN; 8281da177e4SLinus Torvalds } 8291da177e4SLinus Torvalds 8301da177e4SLinus Torvalds static int 8311da177e4SLinus Torvalds dasd_eckd_end_analysis(struct dasd_device *device) 8321da177e4SLinus Torvalds { 8331da177e4SLinus Torvalds struct dasd_eckd_private *private; 8341da177e4SLinus Torvalds struct eckd_count *count_area; 8351da177e4SLinus Torvalds unsigned int sb, blk_per_trk; 8361da177e4SLinus Torvalds int status, i; 8371da177e4SLinus Torvalds 8381da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 8391da177e4SLinus Torvalds status = private->init_cqr_status; 8401da177e4SLinus Torvalds private->init_cqr_status = -1; 8411da177e4SLinus Torvalds if (status != DASD_CQR_DONE) { 8421da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 8431da177e4SLinus Torvalds "volume analysis returned unformatted disk"); 8441da177e4SLinus Torvalds return -EMEDIUMTYPE; 8451da177e4SLinus Torvalds } 8461da177e4SLinus Torvalds 8471da177e4SLinus Torvalds private->uses_cdl = 1; 8481da177e4SLinus Torvalds /* Calculate number of blocks/records per track. */ 8491da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, device->bp_block); 8501da177e4SLinus Torvalds /* Check Track 0 for Compatible Disk Layout */ 8511da177e4SLinus Torvalds count_area = NULL; 8521da177e4SLinus Torvalds for (i = 0; i < 3; i++) { 8531da177e4SLinus Torvalds if (private->count_area[i].kl != 4 || 8541da177e4SLinus Torvalds private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4) { 8551da177e4SLinus Torvalds private->uses_cdl = 0; 8561da177e4SLinus Torvalds break; 8571da177e4SLinus Torvalds } 8581da177e4SLinus Torvalds } 8591da177e4SLinus Torvalds if (i == 3) 8601da177e4SLinus Torvalds count_area = &private->count_area[4]; 8611da177e4SLinus Torvalds 8621da177e4SLinus Torvalds if (private->uses_cdl == 0) { 8631da177e4SLinus Torvalds for (i = 0; i < 5; i++) { 8641da177e4SLinus Torvalds if ((private->count_area[i].kl != 0) || 8651da177e4SLinus Torvalds (private->count_area[i].dl != 8661da177e4SLinus Torvalds private->count_area[0].dl)) 8671da177e4SLinus Torvalds break; 8681da177e4SLinus Torvalds } 8691da177e4SLinus Torvalds if (i == 5) 8701da177e4SLinus Torvalds count_area = &private->count_area[0]; 8711da177e4SLinus Torvalds } else { 8721da177e4SLinus Torvalds if (private->count_area[3].record == 1) 8731da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 8741da177e4SLinus Torvalds "Trk 0: no records after VTOC!"); 8751da177e4SLinus Torvalds } 8761da177e4SLinus Torvalds if (count_area != NULL && count_area->kl == 0) { 8771da177e4SLinus Torvalds /* we found notthing violating our disk layout */ 8781da177e4SLinus Torvalds if (dasd_check_blocksize(count_area->dl) == 0) 8791da177e4SLinus Torvalds device->bp_block = count_area->dl; 8801da177e4SLinus Torvalds } 8811da177e4SLinus Torvalds if (device->bp_block == 0) { 8821da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 8831da177e4SLinus Torvalds "Volume has incompatible disk layout"); 8841da177e4SLinus Torvalds return -EMEDIUMTYPE; 8851da177e4SLinus Torvalds } 8861da177e4SLinus Torvalds device->s2b_shift = 0; /* bits to shift 512 to get a block */ 8871da177e4SLinus Torvalds for (sb = 512; sb < device->bp_block; sb = sb << 1) 8881da177e4SLinus Torvalds device->s2b_shift++; 8891da177e4SLinus Torvalds 8901da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, device->bp_block); 8911da177e4SLinus Torvalds device->blocks = (private->rdc_data.no_cyl * 8921da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 8931da177e4SLinus Torvalds blk_per_trk); 8941da177e4SLinus Torvalds 8951da177e4SLinus Torvalds DEV_MESSAGE(KERN_INFO, device, 8961da177e4SLinus Torvalds "(%dkB blks): %dkB at %dkB/trk %s", 8971da177e4SLinus Torvalds (device->bp_block >> 10), 8981da177e4SLinus Torvalds ((private->rdc_data.no_cyl * 8991da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 9001da177e4SLinus Torvalds blk_per_trk * (device->bp_block >> 9)) >> 1), 9011da177e4SLinus Torvalds ((blk_per_trk * device->bp_block) >> 10), 9021da177e4SLinus Torvalds private->uses_cdl ? 9031da177e4SLinus Torvalds "compatible disk layout" : "linux disk layout"); 9041da177e4SLinus Torvalds 9051da177e4SLinus Torvalds return 0; 9061da177e4SLinus Torvalds } 9071da177e4SLinus Torvalds 9081da177e4SLinus Torvalds static int 9091da177e4SLinus Torvalds dasd_eckd_do_analysis(struct dasd_device *device) 9101da177e4SLinus Torvalds { 9111da177e4SLinus Torvalds struct dasd_eckd_private *private; 9121da177e4SLinus Torvalds 9131da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 9141da177e4SLinus Torvalds if (private->init_cqr_status < 0) 9151da177e4SLinus Torvalds return dasd_eckd_start_analysis(device); 9161da177e4SLinus Torvalds else 9171da177e4SLinus Torvalds return dasd_eckd_end_analysis(device); 9181da177e4SLinus Torvalds } 9191da177e4SLinus Torvalds 9201da177e4SLinus Torvalds static int 9211da177e4SLinus Torvalds dasd_eckd_fill_geometry(struct dasd_device *device, struct hd_geometry *geo) 9221da177e4SLinus Torvalds { 9231da177e4SLinus Torvalds struct dasd_eckd_private *private; 9241da177e4SLinus Torvalds 9251da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 9261da177e4SLinus Torvalds if (dasd_check_blocksize(device->bp_block) == 0) { 9271da177e4SLinus Torvalds geo->sectors = recs_per_track(&private->rdc_data, 9281da177e4SLinus Torvalds 0, device->bp_block); 9291da177e4SLinus Torvalds } 9301da177e4SLinus Torvalds geo->cylinders = private->rdc_data.no_cyl; 9311da177e4SLinus Torvalds geo->heads = private->rdc_data.trk_per_cyl; 9321da177e4SLinus Torvalds return 0; 9331da177e4SLinus Torvalds } 9341da177e4SLinus Torvalds 9351da177e4SLinus Torvalds static struct dasd_ccw_req * 9361da177e4SLinus Torvalds dasd_eckd_format_device(struct dasd_device * device, 9371da177e4SLinus Torvalds struct format_data_t * fdata) 9381da177e4SLinus Torvalds { 9391da177e4SLinus Torvalds struct dasd_eckd_private *private; 9401da177e4SLinus Torvalds struct dasd_ccw_req *fcp; 9411da177e4SLinus Torvalds struct eckd_count *ect; 9421da177e4SLinus Torvalds struct ccw1 *ccw; 9431da177e4SLinus Torvalds void *data; 9441da177e4SLinus Torvalds int rpt, cyl, head; 9451da177e4SLinus Torvalds int cplength, datasize; 9461da177e4SLinus Torvalds int i; 9471da177e4SLinus Torvalds 9481da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 9491da177e4SLinus Torvalds rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize); 9501da177e4SLinus Torvalds cyl = fdata->start_unit / private->rdc_data.trk_per_cyl; 9511da177e4SLinus Torvalds head = fdata->start_unit % private->rdc_data.trk_per_cyl; 9521da177e4SLinus Torvalds 9531da177e4SLinus Torvalds /* Sanity checks. */ 9541da177e4SLinus Torvalds if (fdata->start_unit >= 9551da177e4SLinus Torvalds (private->rdc_data.no_cyl * private->rdc_data.trk_per_cyl)) { 9561da177e4SLinus Torvalds DEV_MESSAGE(KERN_INFO, device, "Track no %d too big!", 9571da177e4SLinus Torvalds fdata->start_unit); 9581da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 9591da177e4SLinus Torvalds } 9601da177e4SLinus Torvalds if (fdata->start_unit > fdata->stop_unit) { 9611da177e4SLinus Torvalds DEV_MESSAGE(KERN_INFO, device, "Track %d reached! ending.", 9621da177e4SLinus Torvalds fdata->start_unit); 9631da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 9641da177e4SLinus Torvalds } 9651da177e4SLinus Torvalds if (dasd_check_blocksize(fdata->blksize) != 0) { 9661da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, 9671da177e4SLinus Torvalds "Invalid blocksize %d...terminating!", 9681da177e4SLinus Torvalds fdata->blksize); 9691da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 9701da177e4SLinus Torvalds } 9711da177e4SLinus Torvalds 9721da177e4SLinus Torvalds /* 9731da177e4SLinus Torvalds * fdata->intensity is a bit string that tells us what to do: 9741da177e4SLinus Torvalds * Bit 0: write record zero 9751da177e4SLinus Torvalds * Bit 1: write home address, currently not supported 9761da177e4SLinus Torvalds * Bit 2: invalidate tracks 9771da177e4SLinus Torvalds * Bit 3: use OS/390 compatible disk layout (cdl) 9781da177e4SLinus Torvalds * Only some bit combinations do make sense. 9791da177e4SLinus Torvalds */ 9801da177e4SLinus Torvalds switch (fdata->intensity) { 9811da177e4SLinus Torvalds case 0x00: /* Normal format */ 9821da177e4SLinus Torvalds case 0x08: /* Normal format, use cdl. */ 9831da177e4SLinus Torvalds cplength = 2 + rpt; 9841da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 9851da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 9861da177e4SLinus Torvalds rpt * sizeof(struct eckd_count); 9871da177e4SLinus Torvalds break; 9881da177e4SLinus Torvalds case 0x01: /* Write record zero and format track. */ 9891da177e4SLinus Torvalds case 0x09: /* Write record zero and format track, use cdl. */ 9901da177e4SLinus Torvalds cplength = 3 + rpt; 9911da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 9921da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 9931da177e4SLinus Torvalds sizeof(struct eckd_count) + 9941da177e4SLinus Torvalds rpt * sizeof(struct eckd_count); 9951da177e4SLinus Torvalds break; 9961da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 9971da177e4SLinus Torvalds case 0x0c: /* Invalidate track, use cdl. */ 9981da177e4SLinus Torvalds cplength = 3; 9991da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 10001da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 10011da177e4SLinus Torvalds sizeof(struct eckd_count); 10021da177e4SLinus Torvalds break; 10031da177e4SLinus Torvalds default: 10041da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "Invalid flags 0x%x.", 10051da177e4SLinus Torvalds fdata->intensity); 10061da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 10071da177e4SLinus Torvalds } 10081da177e4SLinus Torvalds /* Allocate the format ccw request. */ 10091da177e4SLinus Torvalds fcp = dasd_smalloc_request(dasd_eckd_discipline.name, 10101da177e4SLinus Torvalds cplength, datasize, device); 10111da177e4SLinus Torvalds if (IS_ERR(fcp)) 10121da177e4SLinus Torvalds return fcp; 10131da177e4SLinus Torvalds 10141da177e4SLinus Torvalds data = fcp->data; 10151da177e4SLinus Torvalds ccw = fcp->cpaddr; 10161da177e4SLinus Torvalds 10171da177e4SLinus Torvalds switch (fdata->intensity & ~0x08) { 10181da177e4SLinus Torvalds case 0x00: /* Normal format. */ 10191da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 10201da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 10211da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device); 10221da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 10231da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 10241da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 10251da177e4SLinus Torvalds fdata->start_unit, 0, rpt, 10261da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device, 10271da177e4SLinus Torvalds fdata->blksize); 10281da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 10291da177e4SLinus Torvalds break; 10301da177e4SLinus Torvalds case 0x01: /* Write record zero + format track. */ 10311da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 10321da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 10331da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, 10341da177e4SLinus Torvalds device); 10351da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 10361da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 10371da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 10381da177e4SLinus Torvalds fdata->start_unit, 0, rpt + 1, 10391da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, device, 10401da177e4SLinus Torvalds device->bp_block); 10411da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 10421da177e4SLinus Torvalds break; 10431da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 10441da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 10451da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 10461da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device); 10471da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 10481da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 10491da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 10501da177e4SLinus Torvalds fdata->start_unit, 0, 1, 10511da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device, 8); 10521da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 10531da177e4SLinus Torvalds break; 10541da177e4SLinus Torvalds } 10551da177e4SLinus Torvalds if (fdata->intensity & 0x01) { /* write record zero */ 10561da177e4SLinus Torvalds ect = (struct eckd_count *) data; 10571da177e4SLinus Torvalds data += sizeof(struct eckd_count); 10581da177e4SLinus Torvalds ect->cyl = cyl; 10591da177e4SLinus Torvalds ect->head = head; 10601da177e4SLinus Torvalds ect->record = 0; 10611da177e4SLinus Torvalds ect->kl = 0; 10621da177e4SLinus Torvalds ect->dl = 8; 10631da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 10641da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 10651da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 10661da177e4SLinus Torvalds ccw->count = 8; 10671da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 10681da177e4SLinus Torvalds ccw++; 10691da177e4SLinus Torvalds } 10701da177e4SLinus Torvalds if ((fdata->intensity & ~0x08) & 0x04) { /* erase track */ 10711da177e4SLinus Torvalds ect = (struct eckd_count *) data; 10721da177e4SLinus Torvalds data += sizeof(struct eckd_count); 10731da177e4SLinus Torvalds ect->cyl = cyl; 10741da177e4SLinus Torvalds ect->head = head; 10751da177e4SLinus Torvalds ect->record = 1; 10761da177e4SLinus Torvalds ect->kl = 0; 10771da177e4SLinus Torvalds ect->dl = 0; 10781da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 10791da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 10801da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 10811da177e4SLinus Torvalds ccw->count = 8; 10821da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 10831da177e4SLinus Torvalds } else { /* write remaining records */ 10841da177e4SLinus Torvalds for (i = 0; i < rpt; i++) { 10851da177e4SLinus Torvalds ect = (struct eckd_count *) data; 10861da177e4SLinus Torvalds data += sizeof(struct eckd_count); 10871da177e4SLinus Torvalds ect->cyl = cyl; 10881da177e4SLinus Torvalds ect->head = head; 10891da177e4SLinus Torvalds ect->record = i + 1; 10901da177e4SLinus Torvalds ect->kl = 0; 10911da177e4SLinus Torvalds ect->dl = fdata->blksize; 10921da177e4SLinus Torvalds /* Check for special tracks 0-1 when formatting CDL */ 10931da177e4SLinus Torvalds if ((fdata->intensity & 0x08) && 10941da177e4SLinus Torvalds fdata->start_unit == 0) { 10951da177e4SLinus Torvalds if (i < 3) { 10961da177e4SLinus Torvalds ect->kl = 4; 10971da177e4SLinus Torvalds ect->dl = sizes_trk0[i] - 4; 10981da177e4SLinus Torvalds } 10991da177e4SLinus Torvalds } 11001da177e4SLinus Torvalds if ((fdata->intensity & 0x08) && 11011da177e4SLinus Torvalds fdata->start_unit == 1) { 11021da177e4SLinus Torvalds ect->kl = 44; 11031da177e4SLinus Torvalds ect->dl = LABEL_SIZE - 44; 11041da177e4SLinus Torvalds } 11051da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 11061da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 11071da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 11081da177e4SLinus Torvalds ccw->count = 8; 11091da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 11101da177e4SLinus Torvalds ccw++; 11111da177e4SLinus Torvalds } 11121da177e4SLinus Torvalds } 11131da177e4SLinus Torvalds fcp->device = device; 11141da177e4SLinus Torvalds fcp->retries = 2; /* set retry counter to enable ERP */ 11151da177e4SLinus Torvalds fcp->buildclk = get_clock(); 11161da177e4SLinus Torvalds fcp->status = DASD_CQR_FILLED; 11171da177e4SLinus Torvalds return fcp; 11181da177e4SLinus Torvalds } 11191da177e4SLinus Torvalds 11201da177e4SLinus Torvalds static dasd_era_t 11211da177e4SLinus Torvalds dasd_eckd_examine_error(struct dasd_ccw_req * cqr, struct irb * irb) 11221da177e4SLinus Torvalds { 11231da177e4SLinus Torvalds struct dasd_device *device = (struct dasd_device *) cqr->device; 11241da177e4SLinus Torvalds struct ccw_device *cdev = device->cdev; 11251da177e4SLinus Torvalds 11261da177e4SLinus Torvalds if (irb->scsw.cstat == 0x00 && 11271da177e4SLinus Torvalds irb->scsw.dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END)) 11281da177e4SLinus Torvalds return dasd_era_none; 11291da177e4SLinus Torvalds 11301da177e4SLinus Torvalds switch (cdev->id.cu_type) { 11311da177e4SLinus Torvalds case 0x3990: 11321da177e4SLinus Torvalds case 0x2105: 11331da177e4SLinus Torvalds case 0x2107: 11341da177e4SLinus Torvalds case 0x1750: 11351da177e4SLinus Torvalds return dasd_3990_erp_examine(cqr, irb); 11361da177e4SLinus Torvalds case 0x9343: 11371da177e4SLinus Torvalds return dasd_9343_erp_examine(cqr, irb); 11381da177e4SLinus Torvalds case 0x3880: 11391da177e4SLinus Torvalds default: 11401da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 11411da177e4SLinus Torvalds "default (unknown CU type) - RECOVERABLE return"); 11421da177e4SLinus Torvalds return dasd_era_recover; 11431da177e4SLinus Torvalds } 11441da177e4SLinus Torvalds } 11451da177e4SLinus Torvalds 11461da177e4SLinus Torvalds static dasd_erp_fn_t 11471da177e4SLinus Torvalds dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 11481da177e4SLinus Torvalds { 11491da177e4SLinus Torvalds struct dasd_device *device = (struct dasd_device *) cqr->device; 11501da177e4SLinus Torvalds struct ccw_device *cdev = device->cdev; 11511da177e4SLinus Torvalds 11521da177e4SLinus Torvalds switch (cdev->id.cu_type) { 11531da177e4SLinus Torvalds case 0x3990: 11541da177e4SLinus Torvalds case 0x2105: 11551da177e4SLinus Torvalds case 0x2107: 11561da177e4SLinus Torvalds case 0x1750: 11571da177e4SLinus Torvalds return dasd_3990_erp_action; 11581da177e4SLinus Torvalds case 0x9343: 11591da177e4SLinus Torvalds case 0x3880: 11601da177e4SLinus Torvalds default: 11611da177e4SLinus Torvalds return dasd_default_erp_action; 11621da177e4SLinus Torvalds } 11631da177e4SLinus Torvalds } 11641da177e4SLinus Torvalds 11651da177e4SLinus Torvalds static dasd_erp_fn_t 11661da177e4SLinus Torvalds dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 11671da177e4SLinus Torvalds { 11681da177e4SLinus Torvalds return dasd_default_erp_postaction; 11691da177e4SLinus Torvalds } 11701da177e4SLinus Torvalds 11711da177e4SLinus Torvalds static struct dasd_ccw_req * 11721da177e4SLinus Torvalds dasd_eckd_build_cp(struct dasd_device * device, struct request *req) 11731da177e4SLinus Torvalds { 11741da177e4SLinus Torvalds struct dasd_eckd_private *private; 11751da177e4SLinus Torvalds unsigned long *idaws; 11761da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 11771da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 11781da177e4SLinus Torvalds struct ccw1 *ccw; 11791da177e4SLinus Torvalds struct bio *bio; 11801da177e4SLinus Torvalds struct bio_vec *bv; 11811da177e4SLinus Torvalds char *dst; 11821da177e4SLinus Torvalds unsigned int blksize, blk_per_trk, off; 11831da177e4SLinus Torvalds int count, cidaw, cplength, datasize; 11841da177e4SLinus Torvalds sector_t recid, first_rec, last_rec; 11851da177e4SLinus Torvalds sector_t first_trk, last_trk; 11861da177e4SLinus Torvalds unsigned int first_offs, last_offs; 11871da177e4SLinus Torvalds unsigned char cmd, rcmd; 11881da177e4SLinus Torvalds int i; 11891da177e4SLinus Torvalds 11901da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 11911da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 11921da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_READ_MT; 11931da177e4SLinus Torvalds else if (rq_data_dir(req) == WRITE) 11941da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_WRITE_MT; 11951da177e4SLinus Torvalds else 11961da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 11971da177e4SLinus Torvalds /* Calculate number of blocks/records per track. */ 11981da177e4SLinus Torvalds blksize = device->bp_block; 11991da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 12001da177e4SLinus Torvalds /* Calculate record id of first and last block. */ 12011da177e4SLinus Torvalds first_rec = first_trk = req->sector >> device->s2b_shift; 12021da177e4SLinus Torvalds first_offs = sector_div(first_trk, blk_per_trk); 12031da177e4SLinus Torvalds last_rec = last_trk = 12041da177e4SLinus Torvalds (req->sector + req->nr_sectors - 1) >> device->s2b_shift; 12051da177e4SLinus Torvalds last_offs = sector_div(last_trk, blk_per_trk); 12061da177e4SLinus Torvalds /* Check struct bio and count the number of blocks for the request. */ 12071da177e4SLinus Torvalds count = 0; 12081da177e4SLinus Torvalds cidaw = 0; 12091da177e4SLinus Torvalds rq_for_each_bio(bio, req) { 12101da177e4SLinus Torvalds bio_for_each_segment(bv, bio, i) { 12111da177e4SLinus Torvalds if (bv->bv_len & (blksize - 1)) 12121da177e4SLinus Torvalds /* Eckd can only do full blocks. */ 12131da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 12141da177e4SLinus Torvalds count += bv->bv_len >> (device->s2b_shift + 9); 1215347a8dc3SMartin Schwidefsky #if defined(CONFIG_64BIT) 12161da177e4SLinus Torvalds if (idal_is_needed (page_address(bv->bv_page), 12171da177e4SLinus Torvalds bv->bv_len)) 12181da177e4SLinus Torvalds cidaw += bv->bv_len >> (device->s2b_shift + 9); 12191da177e4SLinus Torvalds #endif 12201da177e4SLinus Torvalds } 12211da177e4SLinus Torvalds } 12221da177e4SLinus Torvalds /* Paranoia. */ 12231da177e4SLinus Torvalds if (count != last_rec - first_rec + 1) 12241da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 12251da177e4SLinus Torvalds /* 1x define extent + 1x locate record + number of blocks */ 12261da177e4SLinus Torvalds cplength = 2 + count; 12271da177e4SLinus Torvalds /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 12281da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + sizeof(struct LO_eckd_data) + 12291da177e4SLinus Torvalds cidaw * sizeof(unsigned long); 12301da177e4SLinus Torvalds /* Find out the number of additional locate record ccws for cdl. */ 12311da177e4SLinus Torvalds if (private->uses_cdl && first_rec < 2*blk_per_trk) { 12321da177e4SLinus Torvalds if (last_rec >= 2*blk_per_trk) 12331da177e4SLinus Torvalds count = 2*blk_per_trk - first_rec; 12341da177e4SLinus Torvalds cplength += count; 12351da177e4SLinus Torvalds datasize += count*sizeof(struct LO_eckd_data); 12361da177e4SLinus Torvalds } 12371da177e4SLinus Torvalds /* Allocate the ccw request. */ 12381da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 12391da177e4SLinus Torvalds cplength, datasize, device); 12401da177e4SLinus Torvalds if (IS_ERR(cqr)) 12411da177e4SLinus Torvalds return cqr; 12421da177e4SLinus Torvalds ccw = cqr->cpaddr; 12431da177e4SLinus Torvalds /* First ccw is define extent. */ 1244d54853efSMartin Schwidefsky if (define_extent(ccw++, cqr->data, first_trk, 1245d54853efSMartin Schwidefsky last_trk, cmd, device) == -EAGAIN) { 1246d54853efSMartin Schwidefsky /* Clock not in sync and XRC is enabled. Try again later. */ 1247d54853efSMartin Schwidefsky dasd_sfree_request(cqr, device); 1248d54853efSMartin Schwidefsky return ERR_PTR(-EAGAIN); 1249d54853efSMartin Schwidefsky } 12501da177e4SLinus Torvalds /* Build locate_record+read/write/ccws. */ 12511da177e4SLinus Torvalds idaws = (unsigned long *) (cqr->data + sizeof(struct DE_eckd_data)); 12521da177e4SLinus Torvalds LO_data = (struct LO_eckd_data *) (idaws + cidaw); 12531da177e4SLinus Torvalds recid = first_rec; 12541da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 12551da177e4SLinus Torvalds /* Only standard blocks so there is just one locate record. */ 12561da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 12571da177e4SLinus Torvalds locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 12581da177e4SLinus Torvalds last_rec - recid + 1, cmd, device, blksize); 12591da177e4SLinus Torvalds } 12601da177e4SLinus Torvalds rq_for_each_bio(bio, req) bio_for_each_segment(bv, bio, i) { 12611da177e4SLinus Torvalds dst = page_address(bv->bv_page) + bv->bv_offset; 12621da177e4SLinus Torvalds if (dasd_page_cache) { 12631da177e4SLinus Torvalds char *copy = kmem_cache_alloc(dasd_page_cache, 1264441e143eSChristoph Lameter GFP_DMA | __GFP_NOWARN); 12651da177e4SLinus Torvalds if (copy && rq_data_dir(req) == WRITE) 12661da177e4SLinus Torvalds memcpy(copy + bv->bv_offset, dst, bv->bv_len); 12671da177e4SLinus Torvalds if (copy) 12681da177e4SLinus Torvalds dst = copy + bv->bv_offset; 12691da177e4SLinus Torvalds } 12701da177e4SLinus Torvalds for (off = 0; off < bv->bv_len; off += blksize) { 12711da177e4SLinus Torvalds sector_t trkid = recid; 12721da177e4SLinus Torvalds unsigned int recoffs = sector_div(trkid, blk_per_trk); 12731da177e4SLinus Torvalds rcmd = cmd; 12741da177e4SLinus Torvalds count = blksize; 12751da177e4SLinus Torvalds /* Locate record for cdl special block ? */ 12761da177e4SLinus Torvalds if (private->uses_cdl && recid < 2*blk_per_trk) { 12771da177e4SLinus Torvalds if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 12781da177e4SLinus Torvalds rcmd |= 0x8; 12791da177e4SLinus Torvalds count = dasd_eckd_cdl_reclen(recid); 1280ec5883abSHorst Hummel if (count < blksize && 1281ec5883abSHorst Hummel rq_data_dir(req) == READ) 12821da177e4SLinus Torvalds memset(dst + count, 0xe5, 12831da177e4SLinus Torvalds blksize - count); 12841da177e4SLinus Torvalds } 12851da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 12861da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 12871da177e4SLinus Torvalds trkid, recoffs + 1, 12881da177e4SLinus Torvalds 1, rcmd, device, count); 12891da177e4SLinus Torvalds } 12901da177e4SLinus Torvalds /* Locate record for standard blocks ? */ 12911da177e4SLinus Torvalds if (private->uses_cdl && recid == 2*blk_per_trk) { 12921da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 12931da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 12941da177e4SLinus Torvalds trkid, recoffs + 1, 12951da177e4SLinus Torvalds last_rec - recid + 1, 12961da177e4SLinus Torvalds cmd, device, count); 12971da177e4SLinus Torvalds } 12981da177e4SLinus Torvalds /* Read/write ccw. */ 12991da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 13001da177e4SLinus Torvalds ccw->cmd_code = rcmd; 13011da177e4SLinus Torvalds ccw->count = count; 13021da177e4SLinus Torvalds if (idal_is_needed(dst, blksize)) { 13031da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) idaws; 13041da177e4SLinus Torvalds ccw->flags = CCW_FLAG_IDA; 13051da177e4SLinus Torvalds idaws = idal_create_words(idaws, dst, blksize); 13061da177e4SLinus Torvalds } else { 13071da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) dst; 13081da177e4SLinus Torvalds ccw->flags = 0; 13091da177e4SLinus Torvalds } 13101da177e4SLinus Torvalds ccw++; 13111da177e4SLinus Torvalds dst += blksize; 13121da177e4SLinus Torvalds recid++; 13131da177e4SLinus Torvalds } 13141da177e4SLinus Torvalds } 13154aff5e23SJens Axboe if (req->cmd_flags & REQ_FAILFAST) 13161c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 13171da177e4SLinus Torvalds cqr->device = device; 13181da177e4SLinus Torvalds cqr->expires = 5 * 60 * HZ; /* 5 minutes */ 13191da177e4SLinus Torvalds cqr->lpm = private->path_data.ppm; 13201da177e4SLinus Torvalds cqr->retries = 256; 13211da177e4SLinus Torvalds cqr->buildclk = get_clock(); 13221da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 13231da177e4SLinus Torvalds return cqr; 13241da177e4SLinus Torvalds } 13251da177e4SLinus Torvalds 13261da177e4SLinus Torvalds static int 13271da177e4SLinus Torvalds dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 13281da177e4SLinus Torvalds { 13291da177e4SLinus Torvalds struct dasd_eckd_private *private; 13301da177e4SLinus Torvalds struct ccw1 *ccw; 13311da177e4SLinus Torvalds struct bio *bio; 13321da177e4SLinus Torvalds struct bio_vec *bv; 13331da177e4SLinus Torvalds char *dst, *cda; 13341da177e4SLinus Torvalds unsigned int blksize, blk_per_trk, off; 13351da177e4SLinus Torvalds sector_t recid; 13361da177e4SLinus Torvalds int i, status; 13371da177e4SLinus Torvalds 13381da177e4SLinus Torvalds if (!dasd_page_cache) 13391da177e4SLinus Torvalds goto out; 13401da177e4SLinus Torvalds private = (struct dasd_eckd_private *) cqr->device->private; 13411da177e4SLinus Torvalds blksize = cqr->device->bp_block; 13421da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 13431da177e4SLinus Torvalds recid = req->sector >> cqr->device->s2b_shift; 13441da177e4SLinus Torvalds ccw = cqr->cpaddr; 13451da177e4SLinus Torvalds /* Skip over define extent & locate record. */ 13461da177e4SLinus Torvalds ccw++; 13471da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 13481da177e4SLinus Torvalds ccw++; 13491da177e4SLinus Torvalds rq_for_each_bio(bio, req) bio_for_each_segment(bv, bio, i) { 13501da177e4SLinus Torvalds dst = page_address(bv->bv_page) + bv->bv_offset; 13511da177e4SLinus Torvalds for (off = 0; off < bv->bv_len; off += blksize) { 13521da177e4SLinus Torvalds /* Skip locate record. */ 13531da177e4SLinus Torvalds if (private->uses_cdl && recid <= 2*blk_per_trk) 13541da177e4SLinus Torvalds ccw++; 13551da177e4SLinus Torvalds if (dst) { 13561da177e4SLinus Torvalds if (ccw->flags & CCW_FLAG_IDA) 13571da177e4SLinus Torvalds cda = *((char **)((addr_t) ccw->cda)); 13581da177e4SLinus Torvalds else 13591da177e4SLinus Torvalds cda = (char *)((addr_t) ccw->cda); 13601da177e4SLinus Torvalds if (dst != cda) { 13611da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 13621da177e4SLinus Torvalds memcpy(dst, cda, bv->bv_len); 13631da177e4SLinus Torvalds kmem_cache_free(dasd_page_cache, 13641da177e4SLinus Torvalds (void *)((addr_t)cda & PAGE_MASK)); 13651da177e4SLinus Torvalds } 13661da177e4SLinus Torvalds dst = NULL; 13671da177e4SLinus Torvalds } 13681da177e4SLinus Torvalds ccw++; 13691da177e4SLinus Torvalds recid++; 13701da177e4SLinus Torvalds } 13711da177e4SLinus Torvalds } 13721da177e4SLinus Torvalds out: 13731da177e4SLinus Torvalds status = cqr->status == DASD_CQR_DONE; 13741da177e4SLinus Torvalds dasd_sfree_request(cqr, cqr->device); 13751da177e4SLinus Torvalds return status; 13761da177e4SLinus Torvalds } 13771da177e4SLinus Torvalds 13781da177e4SLinus Torvalds static int 13791da177e4SLinus Torvalds dasd_eckd_fill_info(struct dasd_device * device, 13801da177e4SLinus Torvalds struct dasd_information2_t * info) 13811da177e4SLinus Torvalds { 13821da177e4SLinus Torvalds struct dasd_eckd_private *private; 13831da177e4SLinus Torvalds 13841da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 13851da177e4SLinus Torvalds info->label_block = 2; 13861da177e4SLinus Torvalds info->FBA_layout = private->uses_cdl ? 0 : 1; 13871da177e4SLinus Torvalds info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 13881da177e4SLinus Torvalds info->characteristics_size = sizeof(struct dasd_eckd_characteristics); 13891da177e4SLinus Torvalds memcpy(info->characteristics, &private->rdc_data, 13901da177e4SLinus Torvalds sizeof(struct dasd_eckd_characteristics)); 13911da177e4SLinus Torvalds info->confdata_size = sizeof (struct dasd_eckd_confdata); 13921da177e4SLinus Torvalds memcpy(info->configuration_data, &private->conf_data, 13931da177e4SLinus Torvalds sizeof (struct dasd_eckd_confdata)); 13941da177e4SLinus Torvalds return 0; 13951da177e4SLinus Torvalds } 13961da177e4SLinus Torvalds 13971da177e4SLinus Torvalds /* 13981da177e4SLinus Torvalds * SECTION: ioctl functions for eckd devices. 13991da177e4SLinus Torvalds */ 14001da177e4SLinus Torvalds 14011da177e4SLinus Torvalds /* 14021da177e4SLinus Torvalds * Release device ioctl. 14031da177e4SLinus Torvalds * Buils a channel programm to releases a prior reserved 14041da177e4SLinus Torvalds * (see dasd_eckd_reserve) device. 14051da177e4SLinus Torvalds */ 14061da177e4SLinus Torvalds static int 14071107ccfbSChristoph Hellwig dasd_eckd_release(struct dasd_device *device) 14081da177e4SLinus Torvalds { 14091da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 14101da177e4SLinus Torvalds int rc; 14111da177e4SLinus Torvalds 14121da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 14131da177e4SLinus Torvalds return -EACCES; 14141da177e4SLinus Torvalds 14151da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 14161da177e4SLinus Torvalds 1, 32, device); 14171da177e4SLinus Torvalds if (IS_ERR(cqr)) { 14181da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 14191da177e4SLinus Torvalds "Could not allocate initialization request"); 14201da177e4SLinus Torvalds return PTR_ERR(cqr); 14211da177e4SLinus Torvalds } 14221da177e4SLinus Torvalds cqr->cpaddr->cmd_code = DASD_ECKD_CCW_RELEASE; 14231da177e4SLinus Torvalds cqr->cpaddr->flags |= CCW_FLAG_SLI; 14241da177e4SLinus Torvalds cqr->cpaddr->count = 32; 14251da177e4SLinus Torvalds cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; 14261da177e4SLinus Torvalds cqr->device = device; 14271da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 14281c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 1429336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 14301da177e4SLinus Torvalds cqr->expires = 2 * HZ; 14311da177e4SLinus Torvalds cqr->buildclk = get_clock(); 14321da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 14331da177e4SLinus Torvalds 14341da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 14351da177e4SLinus Torvalds 14361da177e4SLinus Torvalds dasd_sfree_request(cqr, cqr->device); 14371da177e4SLinus Torvalds return rc; 14381da177e4SLinus Torvalds } 14391da177e4SLinus Torvalds 14401da177e4SLinus Torvalds /* 14411da177e4SLinus Torvalds * Reserve device ioctl. 14421da177e4SLinus Torvalds * Options are set to 'synchronous wait for interrupt' and 14431da177e4SLinus Torvalds * 'timeout the request'. This leads to a terminate IO if 14441da177e4SLinus Torvalds * the interrupt is outstanding for a certain time. 14451da177e4SLinus Torvalds */ 14461da177e4SLinus Torvalds static int 14471107ccfbSChristoph Hellwig dasd_eckd_reserve(struct dasd_device *device) 14481da177e4SLinus Torvalds { 14491da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 14501da177e4SLinus Torvalds int rc; 14511da177e4SLinus Torvalds 14521da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 14531da177e4SLinus Torvalds return -EACCES; 14541da177e4SLinus Torvalds 14551da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 14561da177e4SLinus Torvalds 1, 32, device); 14571da177e4SLinus Torvalds if (IS_ERR(cqr)) { 14581da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 14591da177e4SLinus Torvalds "Could not allocate initialization request"); 14601da177e4SLinus Torvalds return PTR_ERR(cqr); 14611da177e4SLinus Torvalds } 14621da177e4SLinus Torvalds cqr->cpaddr->cmd_code = DASD_ECKD_CCW_RESERVE; 14631da177e4SLinus Torvalds cqr->cpaddr->flags |= CCW_FLAG_SLI; 14641da177e4SLinus Torvalds cqr->cpaddr->count = 32; 14651da177e4SLinus Torvalds cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; 14661da177e4SLinus Torvalds cqr->device = device; 14671da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 14681c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 1469336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 14701da177e4SLinus Torvalds cqr->expires = 2 * HZ; 14711da177e4SLinus Torvalds cqr->buildclk = get_clock(); 14721da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 14731da177e4SLinus Torvalds 14741da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 14751da177e4SLinus Torvalds 14761da177e4SLinus Torvalds dasd_sfree_request(cqr, cqr->device); 14771da177e4SLinus Torvalds return rc; 14781da177e4SLinus Torvalds } 14791da177e4SLinus Torvalds 14801da177e4SLinus Torvalds /* 14811da177e4SLinus Torvalds * Steal lock ioctl - unconditional reserve device. 14821da177e4SLinus Torvalds * Buils a channel programm to break a device's reservation. 14831da177e4SLinus Torvalds * (unconditional reserve) 14841da177e4SLinus Torvalds */ 14851da177e4SLinus Torvalds static int 14861107ccfbSChristoph Hellwig dasd_eckd_steal_lock(struct dasd_device *device) 14871da177e4SLinus Torvalds { 14881da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 14891da177e4SLinus Torvalds int rc; 14901da177e4SLinus Torvalds 14911da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 14921da177e4SLinus Torvalds return -EACCES; 14931da177e4SLinus Torvalds 14941da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 14951da177e4SLinus Torvalds 1, 32, device); 14961da177e4SLinus Torvalds if (IS_ERR(cqr)) { 14971da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 14981da177e4SLinus Torvalds "Could not allocate initialization request"); 14991da177e4SLinus Torvalds return PTR_ERR(cqr); 15001da177e4SLinus Torvalds } 15011da177e4SLinus Torvalds cqr->cpaddr->cmd_code = DASD_ECKD_CCW_SLCK; 15021da177e4SLinus Torvalds cqr->cpaddr->flags |= CCW_FLAG_SLI; 15031da177e4SLinus Torvalds cqr->cpaddr->count = 32; 15041da177e4SLinus Torvalds cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; 15051da177e4SLinus Torvalds cqr->device = device; 15061da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 15071c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 1508336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 15091da177e4SLinus Torvalds cqr->expires = 2 * HZ; 15101da177e4SLinus Torvalds cqr->buildclk = get_clock(); 15111da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 15121da177e4SLinus Torvalds 15131da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 15141da177e4SLinus Torvalds 15151da177e4SLinus Torvalds dasd_sfree_request(cqr, cqr->device); 15161da177e4SLinus Torvalds return rc; 15171da177e4SLinus Torvalds } 15181da177e4SLinus Torvalds 15191da177e4SLinus Torvalds /* 15201da177e4SLinus Torvalds * Read performance statistics 15211da177e4SLinus Torvalds */ 15221da177e4SLinus Torvalds static int 15231107ccfbSChristoph Hellwig dasd_eckd_performance(struct dasd_device *device, void __user *argp) 15241da177e4SLinus Torvalds { 15251da177e4SLinus Torvalds struct dasd_psf_prssd_data *prssdp; 15261da177e4SLinus Torvalds struct dasd_rssd_perf_stats_t *stats; 15271da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 15281da177e4SLinus Torvalds struct ccw1 *ccw; 15291da177e4SLinus Torvalds int rc; 15301da177e4SLinus Torvalds 15311da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 15321da177e4SLinus Torvalds 1 /* PSF */ + 1 /* RSSD */ , 15331da177e4SLinus Torvalds (sizeof (struct dasd_psf_prssd_data) + 15341da177e4SLinus Torvalds sizeof (struct dasd_rssd_perf_stats_t)), 15351da177e4SLinus Torvalds device); 15361da177e4SLinus Torvalds if (IS_ERR(cqr)) { 15371da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 15381da177e4SLinus Torvalds "Could not allocate initialization request"); 15391da177e4SLinus Torvalds return PTR_ERR(cqr); 15401da177e4SLinus Torvalds } 15411da177e4SLinus Torvalds cqr->device = device; 15421da177e4SLinus Torvalds cqr->retries = 0; 15431da177e4SLinus Torvalds cqr->expires = 10 * HZ; 15441da177e4SLinus Torvalds 15451da177e4SLinus Torvalds /* Prepare for Read Subsystem Data */ 15461da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 15471da177e4SLinus Torvalds memset(prssdp, 0, sizeof (struct dasd_psf_prssd_data)); 15481da177e4SLinus Torvalds prssdp->order = PSF_ORDER_PRSSD; 15491da177e4SLinus Torvalds prssdp->suborder = 0x01; /* Perfomance Statistics */ 15501da177e4SLinus Torvalds prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 15511da177e4SLinus Torvalds 15521da177e4SLinus Torvalds ccw = cqr->cpaddr; 15531da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_PSF; 15541da177e4SLinus Torvalds ccw->count = sizeof (struct dasd_psf_prssd_data); 15551da177e4SLinus Torvalds ccw->flags |= CCW_FLAG_CC; 15561da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) prssdp; 15571da177e4SLinus Torvalds 15581da177e4SLinus Torvalds /* Read Subsystem Data - Performance Statistics */ 15591da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 15601da177e4SLinus Torvalds memset(stats, 0, sizeof (struct dasd_rssd_perf_stats_t)); 15611da177e4SLinus Torvalds 15621da177e4SLinus Torvalds ccw++; 15631da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_RSSD; 15641da177e4SLinus Torvalds ccw->count = sizeof (struct dasd_rssd_perf_stats_t); 15651da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) stats; 15661da177e4SLinus Torvalds 15671da177e4SLinus Torvalds cqr->buildclk = get_clock(); 15681da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 15691da177e4SLinus Torvalds rc = dasd_sleep_on(cqr); 15701da177e4SLinus Torvalds if (rc == 0) { 15711da177e4SLinus Torvalds /* Prepare for Read Subsystem Data */ 15721da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 15731da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 15741107ccfbSChristoph Hellwig if (copy_to_user(argp, stats, 15751107ccfbSChristoph Hellwig sizeof(struct dasd_rssd_perf_stats_t))) 15761107ccfbSChristoph Hellwig rc = -EFAULT; 15771da177e4SLinus Torvalds } 15781da177e4SLinus Torvalds dasd_sfree_request(cqr, cqr->device); 15791da177e4SLinus Torvalds return rc; 15801da177e4SLinus Torvalds } 15811da177e4SLinus Torvalds 15821da177e4SLinus Torvalds /* 15831da177e4SLinus Torvalds * Get attributes (cache operations) 15841da177e4SLinus Torvalds * Returnes the cache attributes used in Define Extend (DE). 15851da177e4SLinus Torvalds */ 15861da177e4SLinus Torvalds static int 15871107ccfbSChristoph Hellwig dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 15881da177e4SLinus Torvalds { 15891107ccfbSChristoph Hellwig struct dasd_eckd_private *private = 15901107ccfbSChristoph Hellwig (struct dasd_eckd_private *)device->private; 15911107ccfbSChristoph Hellwig struct attrib_data_t attrib = private->attrib; 15921da177e4SLinus Torvalds int rc; 15931da177e4SLinus Torvalds 15941da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 15951da177e4SLinus Torvalds return -EACCES; 15961107ccfbSChristoph Hellwig if (!argp) 15971da177e4SLinus Torvalds return -EINVAL; 15981da177e4SLinus Torvalds 15991107ccfbSChristoph Hellwig rc = 0; 16001107ccfbSChristoph Hellwig if (copy_to_user(argp, (long *) &attrib, 16011107ccfbSChristoph Hellwig sizeof (struct attrib_data_t))) 16021107ccfbSChristoph Hellwig rc = -EFAULT; 16031da177e4SLinus Torvalds 16041da177e4SLinus Torvalds return rc; 16051da177e4SLinus Torvalds } 16061da177e4SLinus Torvalds 16071da177e4SLinus Torvalds /* 16081da177e4SLinus Torvalds * Set attributes (cache operations) 16091da177e4SLinus Torvalds * Stores the attributes for cache operation to be used in Define Extend (DE). 16101da177e4SLinus Torvalds */ 16111da177e4SLinus Torvalds static int 16121107ccfbSChristoph Hellwig dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 16131da177e4SLinus Torvalds { 16141107ccfbSChristoph Hellwig struct dasd_eckd_private *private = 16151107ccfbSChristoph Hellwig (struct dasd_eckd_private *)device->private; 16161da177e4SLinus Torvalds struct attrib_data_t attrib; 16171da177e4SLinus Torvalds 16181da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 16191da177e4SLinus Torvalds return -EACCES; 16201107ccfbSChristoph Hellwig if (!argp) 16211da177e4SLinus Torvalds return -EINVAL; 16221da177e4SLinus Torvalds 16231107ccfbSChristoph Hellwig if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 16241da177e4SLinus Torvalds return -EFAULT; 16251da177e4SLinus Torvalds private->attrib = attrib; 16261da177e4SLinus Torvalds 16271da177e4SLinus Torvalds DEV_MESSAGE(KERN_INFO, device, 16281da177e4SLinus Torvalds "cache operation mode set to %x (%i cylinder prestage)", 16291da177e4SLinus Torvalds private->attrib.operation, private->attrib.nr_cyl); 16301da177e4SLinus Torvalds return 0; 16311da177e4SLinus Torvalds } 16321da177e4SLinus Torvalds 16331107ccfbSChristoph Hellwig static int 16341107ccfbSChristoph Hellwig dasd_eckd_ioctl(struct dasd_device *device, unsigned int cmd, void __user *argp) 16351107ccfbSChristoph Hellwig { 16361107ccfbSChristoph Hellwig switch (cmd) { 16371107ccfbSChristoph Hellwig case BIODASDGATTR: 16381107ccfbSChristoph Hellwig return dasd_eckd_get_attrib(device, argp); 16391107ccfbSChristoph Hellwig case BIODASDSATTR: 16401107ccfbSChristoph Hellwig return dasd_eckd_set_attrib(device, argp); 16411107ccfbSChristoph Hellwig case BIODASDPSRD: 16421107ccfbSChristoph Hellwig return dasd_eckd_performance(device, argp); 16431107ccfbSChristoph Hellwig case BIODASDRLSE: 16441107ccfbSChristoph Hellwig return dasd_eckd_release(device); 16451107ccfbSChristoph Hellwig case BIODASDRSRV: 16461107ccfbSChristoph Hellwig return dasd_eckd_reserve(device); 16471107ccfbSChristoph Hellwig case BIODASDSLCK: 16481107ccfbSChristoph Hellwig return dasd_eckd_steal_lock(device); 16491107ccfbSChristoph Hellwig default: 16501107ccfbSChristoph Hellwig return -ENOIOCTLCMD; 16511107ccfbSChristoph Hellwig } 16521107ccfbSChristoph Hellwig } 16531107ccfbSChristoph Hellwig 16541da177e4SLinus Torvalds /* 1655445b5b49SHorst Hummel * Dump the range of CCWs into 'page' buffer 1656445b5b49SHorst Hummel * and return number of printed chars. 1657445b5b49SHorst Hummel */ 16584d284cacSHeiko Carstens static int 1659445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 1660445b5b49SHorst Hummel { 1661445b5b49SHorst Hummel int len, count; 1662445b5b49SHorst Hummel char *datap; 1663445b5b49SHorst Hummel 1664445b5b49SHorst Hummel len = 0; 1665445b5b49SHorst Hummel while (from <= to) { 1666445b5b49SHorst Hummel len += sprintf(page + len, KERN_ERR PRINTK_HEADER 1667445b5b49SHorst Hummel " CCW %p: %08X %08X DAT:", 1668445b5b49SHorst Hummel from, ((int *) from)[0], ((int *) from)[1]); 1669445b5b49SHorst Hummel 1670445b5b49SHorst Hummel /* get pointer to data (consider IDALs) */ 1671445b5b49SHorst Hummel if (from->flags & CCW_FLAG_IDA) 1672445b5b49SHorst Hummel datap = (char *) *((addr_t *) (addr_t) from->cda); 1673445b5b49SHorst Hummel else 1674445b5b49SHorst Hummel datap = (char *) ((addr_t) from->cda); 1675445b5b49SHorst Hummel 1676445b5b49SHorst Hummel /* dump data (max 32 bytes) */ 1677445b5b49SHorst Hummel for (count = 0; count < from->count && count < 32; count++) { 1678445b5b49SHorst Hummel if (count % 8 == 0) len += sprintf(page + len, " "); 1679445b5b49SHorst Hummel if (count % 4 == 0) len += sprintf(page + len, " "); 1680445b5b49SHorst Hummel len += sprintf(page + len, "%02x", datap[count]); 1681445b5b49SHorst Hummel } 1682445b5b49SHorst Hummel len += sprintf(page + len, "\n"); 1683445b5b49SHorst Hummel from++; 1684445b5b49SHorst Hummel } 1685445b5b49SHorst Hummel return len; 1686445b5b49SHorst Hummel } 1687445b5b49SHorst Hummel 1688445b5b49SHorst Hummel /* 16891da177e4SLinus Torvalds * Print sense data and related channel program. 16901da177e4SLinus Torvalds * Parts are printed because printk buffer is only 1024 bytes. 16911da177e4SLinus Torvalds */ 16921da177e4SLinus Torvalds static void 16931da177e4SLinus Torvalds dasd_eckd_dump_sense(struct dasd_device *device, struct dasd_ccw_req * req, 16941da177e4SLinus Torvalds struct irb *irb) 16951da177e4SLinus Torvalds { 16961da177e4SLinus Torvalds char *page; 1697445b5b49SHorst Hummel struct ccw1 *first, *last, *fail, *from, *to; 1698445b5b49SHorst Hummel int len, sl, sct; 16991da177e4SLinus Torvalds 17001da177e4SLinus Torvalds page = (char *) get_zeroed_page(GFP_ATOMIC); 17011da177e4SLinus Torvalds if (page == NULL) { 17021da177e4SLinus Torvalds DEV_MESSAGE(KERN_ERR, device, " %s", 17031da177e4SLinus Torvalds "No memory to dump sense data"); 17041da177e4SLinus Torvalds return; 17051da177e4SLinus Torvalds } 1706445b5b49SHorst Hummel /* dump the sense data */ 17071da177e4SLinus Torvalds len = sprintf(page, KERN_ERR PRINTK_HEADER 17081da177e4SLinus Torvalds " I/O status report for device %s:\n", 17091da177e4SLinus Torvalds device->cdev->dev.bus_id); 17101da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 17111da177e4SLinus Torvalds " in req: %p CS: 0x%02X DS: 0x%02X\n", req, 17121da177e4SLinus Torvalds irb->scsw.cstat, irb->scsw.dstat); 17131da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 17141da177e4SLinus Torvalds " device %s: Failing CCW: %p\n", 17151da177e4SLinus Torvalds device->cdev->dev.bus_id, 17161da177e4SLinus Torvalds (void *) (addr_t) irb->scsw.cpa); 17171da177e4SLinus Torvalds if (irb->esw.esw0.erw.cons) { 17181da177e4SLinus Torvalds for (sl = 0; sl < 4; sl++) { 17191da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 17201da177e4SLinus Torvalds " Sense(hex) %2d-%2d:", 17211da177e4SLinus Torvalds (8 * sl), ((8 * sl) + 7)); 17221da177e4SLinus Torvalds 17231da177e4SLinus Torvalds for (sct = 0; sct < 8; sct++) { 17241da177e4SLinus Torvalds len += sprintf(page + len, " %02x", 17251da177e4SLinus Torvalds irb->ecw[8 * sl + sct]); 17261da177e4SLinus Torvalds } 17271da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 17281da177e4SLinus Torvalds } 17291da177e4SLinus Torvalds 17301da177e4SLinus Torvalds if (irb->ecw[27] & DASD_SENSE_BIT_0) { 17311da177e4SLinus Torvalds /* 24 Byte Sense Data */ 1732445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 17331da177e4SLinus Torvalds " 24 Byte: %x MSG %x, " 17341da177e4SLinus Torvalds "%s MSGb to SYSOP\n", 17351da177e4SLinus Torvalds irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 17361da177e4SLinus Torvalds irb->ecw[1] & 0x10 ? "" : "no"); 17371da177e4SLinus Torvalds } else { 17381da177e4SLinus Torvalds /* 32 Byte Sense Data */ 1739445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 17401da177e4SLinus Torvalds " 32 Byte: Format: %x " 17411da177e4SLinus Torvalds "Exception class %x\n", 17421da177e4SLinus Torvalds irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 17431da177e4SLinus Torvalds } 17441da177e4SLinus Torvalds } else { 1745445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 17461da177e4SLinus Torvalds " SORRY - NO VALID SENSE AVAILABLE\n"); 17471da177e4SLinus Torvalds } 1748445b5b49SHorst Hummel printk("%s", page); 17491da177e4SLinus Torvalds 1750445b5b49SHorst Hummel /* dump the Channel Program (max 140 Bytes per line) */ 1751445b5b49SHorst Hummel /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 1752445b5b49SHorst Hummel first = req->cpaddr; 1753445b5b49SHorst Hummel for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 1754445b5b49SHorst Hummel to = min(first + 6, last); 17551da177e4SLinus Torvalds len = sprintf(page, KERN_ERR PRINTK_HEADER 17561da177e4SLinus Torvalds " Related CP in req: %p\n", req); 1757445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(first, to, page + len); 1758445b5b49SHorst Hummel printk("%s", page); 17591da177e4SLinus Torvalds 1760445b5b49SHorst Hummel /* print failing CCW area (maximum 4) */ 1761445b5b49SHorst Hummel /* scsw->cda is either valid or zero */ 17621da177e4SLinus Torvalds len = 0; 1763445b5b49SHorst Hummel from = ++to; 1764445b5b49SHorst Hummel fail = (struct ccw1 *)(addr_t) irb->scsw.cpa; /* failing CCW */ 1765445b5b49SHorst Hummel if (from < fail - 2) { 1766445b5b49SHorst Hummel from = fail - 2; /* there is a gap - print header */ 1767445b5b49SHorst Hummel len += sprintf(page, KERN_ERR PRINTK_HEADER "......\n"); 17681da177e4SLinus Torvalds } 1769445b5b49SHorst Hummel to = min(fail + 1, last); 1770445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, to, page + len); 17711da177e4SLinus Torvalds 1772445b5b49SHorst Hummel /* print last CCWs (maximum 2) */ 1773445b5b49SHorst Hummel from = max(from, ++to); 1774445b5b49SHorst Hummel if (from < last - 1) { 1775445b5b49SHorst Hummel from = last - 1; /* there is a gap - print header */ 17761da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n"); 17771da177e4SLinus Torvalds } 1778445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, last, page + len); 17791da177e4SLinus Torvalds if (len > 0) 1780445b5b49SHorst Hummel printk("%s", page); 17811da177e4SLinus Torvalds free_page((unsigned long) page); 17821da177e4SLinus Torvalds } 17831da177e4SLinus Torvalds 17841da177e4SLinus Torvalds /* 17851da177e4SLinus Torvalds * max_blocks is dependent on the amount of storage that is available 17861da177e4SLinus Torvalds * in the static io buffer for each device. Currently each device has 17871da177e4SLinus Torvalds * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has 17881da177e4SLinus Torvalds * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use 17891da177e4SLinus Torvalds * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In 17901da177e4SLinus Torvalds * addition we have one define extent ccw + 16 bytes of data and one 17911da177e4SLinus Torvalds * locate record ccw + 16 bytes of data. That makes: 17921da177e4SLinus Torvalds * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. 17931da177e4SLinus Torvalds * We want to fit two into the available memory so that we can immediately 17941da177e4SLinus Torvalds * start the next request if one finishes off. That makes 249.5 blocks 17951da177e4SLinus Torvalds * for one request. Give a little safety and the result is 240. 17961da177e4SLinus Torvalds */ 17971da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline = { 17981da177e4SLinus Torvalds .owner = THIS_MODULE, 17991da177e4SLinus Torvalds .name = "ECKD", 18001da177e4SLinus Torvalds .ebcname = "ECKD", 18011da177e4SLinus Torvalds .max_blocks = 240, 18021da177e4SLinus Torvalds .check_device = dasd_eckd_check_characteristics, 18031da177e4SLinus Torvalds .do_analysis = dasd_eckd_do_analysis, 18041da177e4SLinus Torvalds .fill_geometry = dasd_eckd_fill_geometry, 18051da177e4SLinus Torvalds .start_IO = dasd_start_IO, 18061da177e4SLinus Torvalds .term_IO = dasd_term_IO, 18071da177e4SLinus Torvalds .format_device = dasd_eckd_format_device, 18081da177e4SLinus Torvalds .examine_error = dasd_eckd_examine_error, 18091da177e4SLinus Torvalds .erp_action = dasd_eckd_erp_action, 18101da177e4SLinus Torvalds .erp_postaction = dasd_eckd_erp_postaction, 18111da177e4SLinus Torvalds .build_cp = dasd_eckd_build_cp, 18121da177e4SLinus Torvalds .free_cp = dasd_eckd_free_cp, 18131da177e4SLinus Torvalds .dump_sense = dasd_eckd_dump_sense, 18141da177e4SLinus Torvalds .fill_info = dasd_eckd_fill_info, 18151107ccfbSChristoph Hellwig .ioctl = dasd_eckd_ioctl, 18161da177e4SLinus Torvalds }; 18171da177e4SLinus Torvalds 18181da177e4SLinus Torvalds static int __init 18191da177e4SLinus Torvalds dasd_eckd_init(void) 18201da177e4SLinus Torvalds { 18211da177e4SLinus Torvalds ASCEBC(dasd_eckd_discipline.ebcname, 4); 182240545573SHorst Hummel return ccw_driver_register(&dasd_eckd_driver); 18231da177e4SLinus Torvalds } 18241da177e4SLinus Torvalds 18251da177e4SLinus Torvalds static void __exit 18261da177e4SLinus Torvalds dasd_eckd_cleanup(void) 18271da177e4SLinus Torvalds { 18281da177e4SLinus Torvalds ccw_driver_unregister(&dasd_eckd_driver); 18291da177e4SLinus Torvalds } 18301da177e4SLinus Torvalds 18311da177e4SLinus Torvalds module_init(dasd_eckd_init); 18321da177e4SLinus Torvalds module_exit(dasd_eckd_cleanup); 1833