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 1371da177e4SLinus Torvalds static inline int 1381da177e4SLinus Torvalds bytes_per_record(struct dasd_eckd_characteristics *rdc, int kl, int dl) 1391da177e4SLinus Torvalds { 1401da177e4SLinus Torvalds unsigned int fl1, fl2, int1, int2; 1411da177e4SLinus Torvalds int bpr; 1421da177e4SLinus Torvalds 1431da177e4SLinus Torvalds switch (rdc->formula) { 1441da177e4SLinus Torvalds case 0x01: 1451da177e4SLinus Torvalds fl1 = round_up_multiple(ECKD_F2(rdc) + dl, ECKD_F1(rdc)); 1461da177e4SLinus Torvalds fl2 = round_up_multiple(kl ? ECKD_F2(rdc) + kl : 0, 1471da177e4SLinus Torvalds ECKD_F1(rdc)); 1481da177e4SLinus Torvalds bpr = fl1 + fl2; 1491da177e4SLinus Torvalds break; 1501da177e4SLinus Torvalds case 0x02: 1511da177e4SLinus Torvalds int1 = ceil_quot(dl + ECKD_F6(rdc), ECKD_F5(rdc) << 1); 1521da177e4SLinus Torvalds int2 = ceil_quot(kl + ECKD_F6(rdc), ECKD_F5(rdc) << 1); 1531da177e4SLinus Torvalds fl1 = round_up_multiple(ECKD_F1(rdc) * ECKD_F2(rdc) + dl + 1541da177e4SLinus Torvalds ECKD_F6(rdc) + ECKD_F4(rdc) * int1, 1551da177e4SLinus Torvalds ECKD_F1(rdc)); 1561da177e4SLinus Torvalds fl2 = round_up_multiple(ECKD_F1(rdc) * ECKD_F3(rdc) + kl + 1571da177e4SLinus Torvalds ECKD_F6(rdc) + ECKD_F4(rdc) * int2, 1581da177e4SLinus Torvalds ECKD_F1(rdc)); 1591da177e4SLinus Torvalds bpr = fl1 + fl2; 1601da177e4SLinus Torvalds break; 1611da177e4SLinus Torvalds default: 1621da177e4SLinus Torvalds bpr = 0; 1631da177e4SLinus Torvalds break; 1641da177e4SLinus Torvalds } 1651da177e4SLinus Torvalds return bpr; 1661da177e4SLinus Torvalds } 1671da177e4SLinus Torvalds 1681da177e4SLinus Torvalds static inline unsigned int 1691da177e4SLinus Torvalds bytes_per_track(struct dasd_eckd_characteristics *rdc) 1701da177e4SLinus Torvalds { 1711da177e4SLinus Torvalds return *(unsigned int *) (rdc->byte_per_track) >> 8; 1721da177e4SLinus Torvalds } 1731da177e4SLinus Torvalds 1741da177e4SLinus Torvalds static inline unsigned int 1751da177e4SLinus Torvalds recs_per_track(struct dasd_eckd_characteristics * rdc, 1761da177e4SLinus Torvalds unsigned int kl, unsigned int dl) 1771da177e4SLinus Torvalds { 1781da177e4SLinus Torvalds int dn, kn; 1791da177e4SLinus Torvalds 1801da177e4SLinus Torvalds switch (rdc->dev_type) { 1811da177e4SLinus Torvalds case 0x3380: 1821da177e4SLinus Torvalds if (kl) 1831da177e4SLinus Torvalds return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + 1841da177e4SLinus Torvalds ceil_quot(dl + 12, 32)); 1851da177e4SLinus Torvalds else 1861da177e4SLinus Torvalds return 1499 / (15 + ceil_quot(dl + 12, 32)); 1871da177e4SLinus Torvalds case 0x3390: 1881da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1891da177e4SLinus Torvalds if (kl) { 1901da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1911da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + 1921da177e4SLinus Torvalds 9 + ceil_quot(dl + 6 * dn, 34)); 1931da177e4SLinus Torvalds } else 1941da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); 1951da177e4SLinus Torvalds case 0x9345: 1961da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1971da177e4SLinus Torvalds if (kl) { 1981da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1991da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + 2001da177e4SLinus Torvalds ceil_quot(dl + 6 * dn, 34)); 2011da177e4SLinus Torvalds } else 2021da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); 2031da177e4SLinus Torvalds } 2041da177e4SLinus Torvalds return 0; 2051da177e4SLinus Torvalds } 2061da177e4SLinus Torvalds 2071da177e4SLinus Torvalds static inline void 2081da177e4SLinus Torvalds check_XRC (struct ccw1 *de_ccw, 2091da177e4SLinus Torvalds struct DE_eckd_data *data, 2101da177e4SLinus Torvalds struct dasd_device *device) 2111da177e4SLinus Torvalds { 2121da177e4SLinus Torvalds struct dasd_eckd_private *private; 2131da177e4SLinus Torvalds 2141da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 2151da177e4SLinus Torvalds 2161da177e4SLinus Torvalds /* switch on System Time Stamp - needed for XRC Support */ 2171da177e4SLinus Torvalds if (private->rdc_data.facilities.XRC_supported) { 2181da177e4SLinus Torvalds 2191da177e4SLinus Torvalds data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ 2201da177e4SLinus Torvalds data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ 2211da177e4SLinus Torvalds 2221da177e4SLinus Torvalds data->ep_sys_time = get_clock (); 2231da177e4SLinus Torvalds 2241da177e4SLinus Torvalds de_ccw->count = sizeof (struct DE_eckd_data); 2251da177e4SLinus Torvalds de_ccw->flags |= CCW_FLAG_SLI; 2261da177e4SLinus Torvalds } 2271da177e4SLinus Torvalds 2281da177e4SLinus Torvalds return; 2291da177e4SLinus Torvalds 2301da177e4SLinus Torvalds } /* end check_XRC */ 2311da177e4SLinus Torvalds 2321da177e4SLinus Torvalds static inline void 2331da177e4SLinus Torvalds define_extent(struct ccw1 * ccw, struct DE_eckd_data * data, int trk, 2341da177e4SLinus Torvalds int totrk, int cmd, struct dasd_device * device) 2351da177e4SLinus Torvalds { 2361da177e4SLinus Torvalds struct dasd_eckd_private *private; 2371da177e4SLinus Torvalds struct ch_t geo, beg, end; 2381da177e4SLinus Torvalds 2391da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 2401da177e4SLinus Torvalds 2411da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; 2421da177e4SLinus Torvalds ccw->flags = 0; 2431da177e4SLinus Torvalds ccw->count = 16; 2441da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 2451da177e4SLinus Torvalds 2461da177e4SLinus Torvalds memset(data, 0, sizeof (struct DE_eckd_data)); 2471da177e4SLinus Torvalds switch (cmd) { 2481da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 2491da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 2501da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 2511da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 2521da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 2531da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 2541da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 2551da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 2561da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_COUNT: 2571da177e4SLinus Torvalds data->mask.perm = 0x1; 2581da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 2591da177e4SLinus Torvalds break; 2601da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 2611da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 2621da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 2631da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 2641da177e4SLinus Torvalds data->mask.perm = 0x02; 2651da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 2661da177e4SLinus Torvalds check_XRC (ccw, data, device); 2671da177e4SLinus Torvalds break; 2681da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 2691da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 2701da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 2711da177e4SLinus Torvalds check_XRC (ccw, data, device); 2721da177e4SLinus Torvalds break; 2731da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 2741da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 2751da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 2761da177e4SLinus Torvalds data->mask.perm = 0x3; 2771da177e4SLinus Torvalds data->mask.auth = 0x1; 2781da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 2791da177e4SLinus Torvalds check_XRC (ccw, data, device); 2801da177e4SLinus Torvalds break; 2811da177e4SLinus Torvalds default: 2821da177e4SLinus Torvalds DEV_MESSAGE(KERN_ERR, device, "unknown opcode 0x%x", cmd); 2831da177e4SLinus Torvalds break; 2841da177e4SLinus Torvalds } 2851da177e4SLinus Torvalds 2861da177e4SLinus Torvalds data->attributes.mode = 0x3; /* ECKD */ 2871da177e4SLinus Torvalds 2881da177e4SLinus Torvalds if ((private->rdc_data.cu_type == 0x2105 || 2891da177e4SLinus Torvalds private->rdc_data.cu_type == 0x2107 || 2901da177e4SLinus Torvalds private->rdc_data.cu_type == 0x1750) 2911da177e4SLinus Torvalds && !(private->uses_cdl && trk < 2)) 2921da177e4SLinus Torvalds data->ga_extended |= 0x40; /* Regular Data Format Mode */ 2931da177e4SLinus Torvalds 2941da177e4SLinus Torvalds geo.cyl = private->rdc_data.no_cyl; 2951da177e4SLinus Torvalds geo.head = private->rdc_data.trk_per_cyl; 2961da177e4SLinus Torvalds beg.cyl = trk / geo.head; 2971da177e4SLinus Torvalds beg.head = trk % geo.head; 2981da177e4SLinus Torvalds end.cyl = totrk / geo.head; 2991da177e4SLinus Torvalds end.head = totrk % geo.head; 3001da177e4SLinus Torvalds 3011da177e4SLinus Torvalds /* check for sequential prestage - enhance cylinder range */ 3021da177e4SLinus Torvalds if (data->attributes.operation == DASD_SEQ_PRESTAGE || 3031da177e4SLinus Torvalds data->attributes.operation == DASD_SEQ_ACCESS) { 3041da177e4SLinus Torvalds 3051da177e4SLinus Torvalds if (end.cyl + private->attrib.nr_cyl < geo.cyl) 3061da177e4SLinus Torvalds end.cyl += private->attrib.nr_cyl; 3071da177e4SLinus Torvalds else 3081da177e4SLinus Torvalds end.cyl = (geo.cyl - 1); 3091da177e4SLinus Torvalds } 3101da177e4SLinus Torvalds 3111da177e4SLinus Torvalds data->beg_ext.cyl = beg.cyl; 3121da177e4SLinus Torvalds data->beg_ext.head = beg.head; 3131da177e4SLinus Torvalds data->end_ext.cyl = end.cyl; 3141da177e4SLinus Torvalds data->end_ext.head = end.head; 3151da177e4SLinus Torvalds } 3161da177e4SLinus Torvalds 3171da177e4SLinus Torvalds static inline void 3181da177e4SLinus Torvalds locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, int trk, 3191da177e4SLinus Torvalds int rec_on_trk, int no_rec, int cmd, 3201da177e4SLinus Torvalds struct dasd_device * device, int reclen) 3211da177e4SLinus Torvalds { 3221da177e4SLinus Torvalds struct dasd_eckd_private *private; 3231da177e4SLinus Torvalds int sector; 3241da177e4SLinus Torvalds int dn, d; 3251da177e4SLinus Torvalds 3261da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 3271da177e4SLinus Torvalds 3281da177e4SLinus Torvalds DBF_DEV_EVENT(DBF_INFO, device, 3291da177e4SLinus Torvalds "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", 3301da177e4SLinus Torvalds trk, rec_on_trk, no_rec, cmd, reclen); 3311da177e4SLinus Torvalds 3321da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; 3331da177e4SLinus Torvalds ccw->flags = 0; 3341da177e4SLinus Torvalds ccw->count = 16; 3351da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 3361da177e4SLinus Torvalds 3371da177e4SLinus Torvalds memset(data, 0, sizeof (struct LO_eckd_data)); 3381da177e4SLinus Torvalds sector = 0; 3391da177e4SLinus Torvalds if (rec_on_trk) { 3401da177e4SLinus Torvalds switch (private->rdc_data.dev_type) { 3411da177e4SLinus Torvalds case 0x3390: 3421da177e4SLinus Torvalds dn = ceil_quot(reclen + 6, 232); 3431da177e4SLinus Torvalds d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 3441da177e4SLinus Torvalds sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 3451da177e4SLinus Torvalds break; 3461da177e4SLinus Torvalds case 0x3380: 3471da177e4SLinus Torvalds d = 7 + ceil_quot(reclen + 12, 32); 3481da177e4SLinus Torvalds sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 3491da177e4SLinus Torvalds break; 3501da177e4SLinus Torvalds } 3511da177e4SLinus Torvalds } 3521da177e4SLinus Torvalds data->sector = sector; 3531da177e4SLinus Torvalds data->count = no_rec; 3541da177e4SLinus Torvalds switch (cmd) { 3551da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 3561da177e4SLinus Torvalds data->operation.orientation = 0x3; 3571da177e4SLinus Torvalds data->operation.operation = 0x03; 3581da177e4SLinus Torvalds break; 3591da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 3601da177e4SLinus Torvalds data->operation.orientation = 0x3; 3611da177e4SLinus Torvalds data->operation.operation = 0x16; 3621da177e4SLinus Torvalds break; 3631da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 3641da177e4SLinus Torvalds data->operation.orientation = 0x1; 3651da177e4SLinus Torvalds data->operation.operation = 0x03; 3661da177e4SLinus Torvalds data->count++; 3671da177e4SLinus Torvalds break; 3681da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 3691da177e4SLinus Torvalds data->operation.orientation = 0x3; 3701da177e4SLinus Torvalds data->operation.operation = 0x16; 3711da177e4SLinus Torvalds data->count++; 3721da177e4SLinus Torvalds break; 3731da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 3741da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 3751da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 3761da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 3771da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 3781da177e4SLinus Torvalds data->length = reclen; 3791da177e4SLinus Torvalds data->operation.operation = 0x01; 3801da177e4SLinus Torvalds break; 3811da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 3821da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 3831da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 3841da177e4SLinus Torvalds data->length = reclen; 3851da177e4SLinus Torvalds data->operation.operation = 0x03; 3861da177e4SLinus Torvalds break; 3871da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 3881da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 3891da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 3901da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 3911da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 3921da177e4SLinus Torvalds data->length = reclen; 3931da177e4SLinus Torvalds data->operation.operation = 0x06; 3941da177e4SLinus Torvalds break; 3951da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 3961da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 3971da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 3981da177e4SLinus Torvalds data->length = reclen; 3991da177e4SLinus Torvalds data->operation.operation = 0x16; 4001da177e4SLinus Torvalds break; 4011da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_COUNT: 4021da177e4SLinus Torvalds data->operation.operation = 0x06; 4031da177e4SLinus Torvalds break; 4041da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 4051da177e4SLinus Torvalds data->length = reclen; 4061da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 4071da177e4SLinus Torvalds data->operation.operation = 0x0b; 4081da177e4SLinus Torvalds break; 4091da177e4SLinus Torvalds default: 4101da177e4SLinus Torvalds DEV_MESSAGE(KERN_ERR, device, "unknown opcode 0x%x", cmd); 4111da177e4SLinus Torvalds } 4121da177e4SLinus Torvalds data->seek_addr.cyl = data->search_arg.cyl = 4131da177e4SLinus Torvalds trk / private->rdc_data.trk_per_cyl; 4141da177e4SLinus Torvalds data->seek_addr.head = data->search_arg.head = 4151da177e4SLinus Torvalds trk % private->rdc_data.trk_per_cyl; 4161da177e4SLinus Torvalds data->search_arg.record = rec_on_trk; 4171da177e4SLinus Torvalds } 4181da177e4SLinus Torvalds 4191da177e4SLinus Torvalds /* 4201da177e4SLinus Torvalds * Returns 1 if the block is one of the special blocks that needs 4211da177e4SLinus Torvalds * to get read/written with the KD variant of the command. 4221da177e4SLinus Torvalds * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and 4231da177e4SLinus Torvalds * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. 4241da177e4SLinus Torvalds * Luckily the KD variants differ only by one bit (0x08) from the 4251da177e4SLinus Torvalds * normal variant. So don't wonder about code like: 4261da177e4SLinus Torvalds * if (dasd_eckd_cdl_special(blk_per_trk, recid)) 4271da177e4SLinus Torvalds * ccw->cmd_code |= 0x8; 4281da177e4SLinus Torvalds */ 4291da177e4SLinus Torvalds static inline int 4301da177e4SLinus Torvalds dasd_eckd_cdl_special(int blk_per_trk, int recid) 4311da177e4SLinus Torvalds { 4321da177e4SLinus Torvalds if (recid < 3) 4331da177e4SLinus Torvalds return 1; 4341da177e4SLinus Torvalds if (recid < blk_per_trk) 4351da177e4SLinus Torvalds return 0; 4361da177e4SLinus Torvalds if (recid < 2 * blk_per_trk) 4371da177e4SLinus Torvalds return 1; 4381da177e4SLinus Torvalds return 0; 4391da177e4SLinus Torvalds } 4401da177e4SLinus Torvalds 4411da177e4SLinus Torvalds /* 4421da177e4SLinus Torvalds * Returns the record size for the special blocks of the cdl format. 4431da177e4SLinus Torvalds * Only returns something useful if dasd_eckd_cdl_special is true 4441da177e4SLinus Torvalds * for the recid. 4451da177e4SLinus Torvalds */ 4461da177e4SLinus Torvalds static inline int 4471da177e4SLinus Torvalds dasd_eckd_cdl_reclen(int recid) 4481da177e4SLinus Torvalds { 4491da177e4SLinus Torvalds if (recid < 3) 4501da177e4SLinus Torvalds return sizes_trk0[recid]; 4511da177e4SLinus Torvalds return LABEL_SIZE; 4521da177e4SLinus Torvalds } 4531da177e4SLinus Torvalds 4543d052595SHorst Hummel /* 4553d052595SHorst Hummel * Generate device unique id that specifies the physical device. 4563d052595SHorst Hummel */ 4573d052595SHorst Hummel static int 4583d052595SHorst Hummel dasd_eckd_generate_uid(struct dasd_device *device, struct dasd_uid *uid) 4593d052595SHorst Hummel { 4603d052595SHorst Hummel struct dasd_eckd_private *private; 4613d052595SHorst Hummel struct dasd_eckd_confdata *confdata; 4623d052595SHorst Hummel 4633d052595SHorst Hummel private = (struct dasd_eckd_private *) device->private; 4643d052595SHorst Hummel if (!private) 4653d052595SHorst Hummel return -ENODEV; 4663d052595SHorst Hummel confdata = &private->conf_data; 4673d052595SHorst Hummel if (!confdata) 4683d052595SHorst Hummel return -ENODEV; 4693d052595SHorst Hummel 4703d052595SHorst Hummel memset(uid, 0, sizeof(struct dasd_uid)); 4713d052595SHorst Hummel strncpy(uid->vendor, confdata->ned1.HDA_manufacturer, 4723d052595SHorst Hummel sizeof(uid->vendor) - 1); 4733d052595SHorst Hummel EBCASC(uid->vendor, sizeof(uid->vendor) - 1); 4743d052595SHorst Hummel strncpy(uid->serial, confdata->ned1.HDA_location, 4753d052595SHorst Hummel sizeof(uid->serial) - 1); 4763d052595SHorst Hummel EBCASC(uid->serial, sizeof(uid->serial) - 1); 4773d052595SHorst Hummel uid->ssid = confdata->neq.subsystemID; 4783d052595SHorst Hummel if (confdata->ned2.sneq.flags == 0x40) { 4793d052595SHorst Hummel uid->alias = 1; 4803d052595SHorst Hummel uid->unit_addr = confdata->ned2.sneq.base_unit_addr; 4813d052595SHorst Hummel } else 4823d052595SHorst Hummel uid->unit_addr = confdata->ned1.unit_addr; 4833d052595SHorst Hummel 4843d052595SHorst Hummel return 0; 4853d052595SHorst Hummel } 4863d052595SHorst Hummel 4871da177e4SLinus Torvalds static int 4881da177e4SLinus Torvalds dasd_eckd_read_conf(struct dasd_device *device) 4891da177e4SLinus Torvalds { 4901da177e4SLinus Torvalds void *conf_data; 4911da177e4SLinus Torvalds int conf_len, conf_data_saved; 4921da177e4SLinus Torvalds int rc; 4931da177e4SLinus Torvalds __u8 lpm; 4941da177e4SLinus Torvalds struct dasd_eckd_private *private; 4951da177e4SLinus Torvalds struct dasd_eckd_path *path_data; 4961da177e4SLinus Torvalds 4971da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 4981da177e4SLinus Torvalds path_data = (struct dasd_eckd_path *) &private->path_data; 4991da177e4SLinus Torvalds path_data->opm = ccw_device_get_path_mask(device->cdev); 5001da177e4SLinus Torvalds lpm = 0x80; 5011da177e4SLinus Torvalds conf_data_saved = 0; 5021da177e4SLinus Torvalds 5031da177e4SLinus Torvalds /* get configuration data per operational path */ 5041da177e4SLinus Torvalds for (lpm = 0x80; lpm; lpm>>= 1) { 5051da177e4SLinus Torvalds if (lpm & path_data->opm){ 5061da177e4SLinus Torvalds rc = read_conf_data_lpm(device->cdev, &conf_data, 5071da177e4SLinus Torvalds &conf_len, lpm); 5081da177e4SLinus Torvalds if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ 5091da177e4SLinus Torvalds MESSAGE(KERN_WARNING, 5101da177e4SLinus Torvalds "Read configuration data returned " 5111da177e4SLinus Torvalds "error %d", rc); 5121da177e4SLinus Torvalds return rc; 5131da177e4SLinus Torvalds } 5141da177e4SLinus Torvalds if (conf_data == NULL) { 5151da177e4SLinus Torvalds MESSAGE(KERN_WARNING, "%s", "No configuration " 5161da177e4SLinus Torvalds "data retrieved"); 5171da177e4SLinus Torvalds continue; /* no errror */ 5181da177e4SLinus Torvalds } 5191da177e4SLinus Torvalds if (conf_len != sizeof (struct dasd_eckd_confdata)) { 5201da177e4SLinus Torvalds MESSAGE(KERN_WARNING, 5211da177e4SLinus Torvalds "sizes of configuration data mismatch" 5221da177e4SLinus Torvalds "%d (read) vs %ld (expected)", 5231da177e4SLinus Torvalds conf_len, 5241da177e4SLinus Torvalds sizeof (struct dasd_eckd_confdata)); 5251da177e4SLinus Torvalds kfree(conf_data); 5261da177e4SLinus Torvalds continue; /* no errror */ 5271da177e4SLinus Torvalds } 5281da177e4SLinus Torvalds /* save first valid configuration data */ 5291da177e4SLinus Torvalds if (!conf_data_saved){ 5301da177e4SLinus Torvalds memcpy(&private->conf_data, conf_data, 5311da177e4SLinus Torvalds sizeof (struct dasd_eckd_confdata)); 5321da177e4SLinus Torvalds conf_data_saved++; 5331da177e4SLinus Torvalds } 5341da177e4SLinus Torvalds switch (((char *)conf_data)[242] & 0x07){ 5351da177e4SLinus Torvalds case 0x02: 5361da177e4SLinus Torvalds path_data->npm |= lpm; 5371da177e4SLinus Torvalds break; 5381da177e4SLinus Torvalds case 0x03: 5391da177e4SLinus Torvalds path_data->ppm |= lpm; 5401da177e4SLinus Torvalds break; 5411da177e4SLinus Torvalds } 5421da177e4SLinus Torvalds kfree(conf_data); 5431da177e4SLinus Torvalds } 5441da177e4SLinus Torvalds } 5451da177e4SLinus Torvalds return 0; 5461da177e4SLinus Torvalds } 5471da177e4SLinus Torvalds 5483d052595SHorst Hummel /* 54940545573SHorst Hummel * Build CP for Perform Subsystem Function - SSC. 55040545573SHorst Hummel */ 55140545573SHorst Hummel struct dasd_ccw_req * 55240545573SHorst Hummel dasd_eckd_build_psf_ssc(struct dasd_device *device) 55340545573SHorst Hummel { 55440545573SHorst Hummel struct dasd_ccw_req *cqr; 55540545573SHorst Hummel struct dasd_psf_ssc_data *psf_ssc_data; 55640545573SHorst Hummel struct ccw1 *ccw; 55740545573SHorst Hummel 55840545573SHorst Hummel cqr = dasd_smalloc_request("ECKD", 1 /* PSF */ , 55940545573SHorst Hummel sizeof(struct dasd_psf_ssc_data), 56040545573SHorst Hummel device); 56140545573SHorst Hummel 56240545573SHorst Hummel if (IS_ERR(cqr)) { 56340545573SHorst Hummel DEV_MESSAGE(KERN_WARNING, device, "%s", 56440545573SHorst Hummel "Could not allocate PSF-SSC request"); 56540545573SHorst Hummel return cqr; 56640545573SHorst Hummel } 56740545573SHorst Hummel psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 56840545573SHorst Hummel psf_ssc_data->order = PSF_ORDER_SSC; 56940545573SHorst Hummel psf_ssc_data->suborder = 0x08; 57040545573SHorst Hummel 57140545573SHorst Hummel ccw = cqr->cpaddr; 57240545573SHorst Hummel ccw->cmd_code = DASD_ECKD_CCW_PSF; 57340545573SHorst Hummel ccw->cda = (__u32)(addr_t)psf_ssc_data; 57440545573SHorst Hummel ccw->count = 66; 57540545573SHorst Hummel 57640545573SHorst Hummel cqr->device = device; 57740545573SHorst Hummel cqr->expires = 10*HZ; 57840545573SHorst Hummel cqr->buildclk = get_clock(); 57940545573SHorst Hummel cqr->status = DASD_CQR_FILLED; 58040545573SHorst Hummel return cqr; 58140545573SHorst Hummel } 58240545573SHorst Hummel 58340545573SHorst Hummel /* 58440545573SHorst Hummel * Perform Subsystem Function. 58540545573SHorst Hummel * It is necessary to trigger CIO for channel revalidation since this 58640545573SHorst Hummel * call might change behaviour of DASD devices. 58740545573SHorst Hummel */ 58840545573SHorst Hummel static int 58940545573SHorst Hummel dasd_eckd_psf_ssc(struct dasd_device *device) 59040545573SHorst Hummel { 59140545573SHorst Hummel struct dasd_ccw_req *cqr; 59240545573SHorst Hummel int rc; 59340545573SHorst Hummel 59440545573SHorst Hummel cqr = dasd_eckd_build_psf_ssc(device); 59540545573SHorst Hummel if (IS_ERR(cqr)) 59640545573SHorst Hummel return PTR_ERR(cqr); 59740545573SHorst Hummel 59840545573SHorst Hummel rc = dasd_sleep_on(cqr); 59940545573SHorst Hummel if (!rc) 60040545573SHorst Hummel /* trigger CIO to reprobe devices */ 60140545573SHorst Hummel css_schedule_reprobe(); 60240545573SHorst Hummel dasd_sfree_request(cqr, cqr->device); 60340545573SHorst Hummel return rc; 60440545573SHorst Hummel } 60540545573SHorst Hummel 60640545573SHorst Hummel /* 60740545573SHorst Hummel * Valide storage server of current device. 60840545573SHorst Hummel */ 60940545573SHorst Hummel static int 61040545573SHorst Hummel dasd_eckd_validate_server(struct dasd_device *device) 61140545573SHorst Hummel { 61240545573SHorst Hummel int rc; 61340545573SHorst Hummel 61440545573SHorst Hummel /* Currently PAV is the only reason to 'validate' server on LPAR */ 61540545573SHorst Hummel if (dasd_nopav || MACHINE_IS_VM) 61640545573SHorst Hummel return 0; 61740545573SHorst Hummel 61840545573SHorst Hummel rc = dasd_eckd_psf_ssc(device); 61940545573SHorst Hummel if (rc) 62040545573SHorst Hummel /* may be requested feature is not available on server, 62140545573SHorst Hummel * therefore just report error and go ahead */ 62240545573SHorst Hummel DEV_MESSAGE(KERN_INFO, device, 62340545573SHorst Hummel "Perform Subsystem Function returned rc=%d", rc); 62440545573SHorst Hummel /* RE-Read Configuration Data */ 62540545573SHorst Hummel return dasd_eckd_read_conf(device); 62640545573SHorst Hummel } 62740545573SHorst Hummel 62840545573SHorst Hummel /* 6293d052595SHorst Hummel * Check device characteristics. 6303d052595SHorst Hummel * If the device is accessible using ECKD discipline, the device is enabled. 6313d052595SHorst Hummel */ 6321da177e4SLinus Torvalds static int 6331da177e4SLinus Torvalds dasd_eckd_check_characteristics(struct dasd_device *device) 6341da177e4SLinus Torvalds { 6351da177e4SLinus Torvalds struct dasd_eckd_private *private; 6363d052595SHorst Hummel struct dasd_uid uid; 6371da177e4SLinus Torvalds void *rdc_data; 6381da177e4SLinus Torvalds int rc; 6391da177e4SLinus Torvalds 6401da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 6411da177e4SLinus Torvalds if (private == NULL) { 642138c014dSHorst Hummel private = kzalloc(sizeof(struct dasd_eckd_private), 6431da177e4SLinus Torvalds GFP_KERNEL | GFP_DMA); 6441da177e4SLinus Torvalds if (private == NULL) { 6451da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 6461da177e4SLinus Torvalds "memory allocation failed for private " 6471da177e4SLinus Torvalds "data"); 6481da177e4SLinus Torvalds return -ENOMEM; 6491da177e4SLinus Torvalds } 6501da177e4SLinus Torvalds device->private = (void *) private; 6511da177e4SLinus Torvalds } 6521da177e4SLinus Torvalds /* Invalidate status of initial analysis. */ 6531da177e4SLinus Torvalds private->init_cqr_status = -1; 6541da177e4SLinus Torvalds /* Set default cache operations. */ 6551da177e4SLinus Torvalds private->attrib.operation = DASD_NORMAL_CACHE; 6561da177e4SLinus Torvalds private->attrib.nr_cyl = 0; 6571da177e4SLinus Torvalds 65840545573SHorst Hummel /* Read Configuration Data */ 65940545573SHorst Hummel rc = dasd_eckd_read_conf(device); 66040545573SHorst Hummel if (rc) 66140545573SHorst Hummel return rc; 66240545573SHorst Hummel 66340545573SHorst Hummel /* Generate device unique id and register in devmap */ 66440545573SHorst Hummel rc = dasd_eckd_generate_uid(device, &uid); 66540545573SHorst Hummel if (rc) 66640545573SHorst Hummel return rc; 66740545573SHorst Hummel rc = dasd_set_uid(device->cdev, &uid); 66840545573SHorst Hummel if (rc == 1) /* new server found */ 66940545573SHorst Hummel rc = dasd_eckd_validate_server(device); 67040545573SHorst Hummel if (rc) 67140545573SHorst Hummel return rc; 67240545573SHorst Hummel 6731da177e4SLinus Torvalds /* Read Device Characteristics */ 6741da177e4SLinus Torvalds rdc_data = (void *) &(private->rdc_data); 6753d052595SHorst Hummel memset(rdc_data, 0, sizeof(rdc_data)); 6761da177e4SLinus Torvalds rc = read_dev_chars(device->cdev, &rdc_data, 64); 67740545573SHorst Hummel if (rc) 6781da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, 67940545573SHorst Hummel "Read device characteristics returned " 68040545573SHorst Hummel "rc=%d", rc); 6811da177e4SLinus Torvalds 6821da177e4SLinus Torvalds DEV_MESSAGE(KERN_INFO, device, 6831da177e4SLinus Torvalds "%04X/%02X(CU:%04X/%02X) Cyl:%d Head:%d Sec:%d", 6841da177e4SLinus Torvalds private->rdc_data.dev_type, 6851da177e4SLinus Torvalds private->rdc_data.dev_model, 6861da177e4SLinus Torvalds private->rdc_data.cu_type, 6871da177e4SLinus Torvalds private->rdc_data.cu_model.model, 6881da177e4SLinus Torvalds private->rdc_data.no_cyl, 6891da177e4SLinus Torvalds private->rdc_data.trk_per_cyl, 6901da177e4SLinus Torvalds private->rdc_data.sec_per_trk); 6913d052595SHorst Hummel return rc; 6921da177e4SLinus Torvalds } 6931da177e4SLinus Torvalds 6941da177e4SLinus Torvalds static struct dasd_ccw_req * 6951da177e4SLinus Torvalds dasd_eckd_analysis_ccw(struct dasd_device *device) 6961da177e4SLinus Torvalds { 6971da177e4SLinus Torvalds struct dasd_eckd_private *private; 6981da177e4SLinus Torvalds struct eckd_count *count_data; 6991da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 7001da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 7011da177e4SLinus Torvalds struct ccw1 *ccw; 7021da177e4SLinus Torvalds int cplength, datasize; 7031da177e4SLinus Torvalds int i; 7041da177e4SLinus Torvalds 7051da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 7061da177e4SLinus Torvalds 7071da177e4SLinus Torvalds cplength = 8; 7081da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 7091da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 7101da177e4SLinus Torvalds cplength, datasize, device); 7111da177e4SLinus Torvalds if (IS_ERR(cqr)) 7121da177e4SLinus Torvalds return cqr; 7131da177e4SLinus Torvalds ccw = cqr->cpaddr; 7141da177e4SLinus Torvalds /* Define extent for the first 3 tracks. */ 7151da177e4SLinus Torvalds define_extent(ccw++, cqr->data, 0, 2, 7161da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device); 7171da177e4SLinus Torvalds LO_data = cqr->data + sizeof (struct DE_eckd_data); 7181da177e4SLinus Torvalds /* Locate record for the first 4 records on track 0. */ 7191da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 7201da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 0, 0, 4, 7211da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 7221da177e4SLinus Torvalds 7231da177e4SLinus Torvalds count_data = private->count_area; 7241da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 7251da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 7261da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 7271da177e4SLinus Torvalds ccw->flags = 0; 7281da177e4SLinus Torvalds ccw->count = 8; 7291da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 7301da177e4SLinus Torvalds ccw++; 7311da177e4SLinus Torvalds count_data++; 7321da177e4SLinus Torvalds } 7331da177e4SLinus Torvalds 7341da177e4SLinus Torvalds /* Locate record for the first record on track 2. */ 7351da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 7361da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 2, 0, 1, 7371da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 7381da177e4SLinus Torvalds /* Read count ccw. */ 7391da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 7401da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 7411da177e4SLinus Torvalds ccw->flags = 0; 7421da177e4SLinus Torvalds ccw->count = 8; 7431da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 7441da177e4SLinus Torvalds 7451da177e4SLinus Torvalds cqr->device = device; 7461da177e4SLinus Torvalds cqr->retries = 0; 7471da177e4SLinus Torvalds cqr->buildclk = get_clock(); 7481da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 7491da177e4SLinus Torvalds return cqr; 7501da177e4SLinus Torvalds } 7511da177e4SLinus Torvalds 7521da177e4SLinus Torvalds /* 7531da177e4SLinus Torvalds * This is the callback function for the init_analysis cqr. It saves 7541da177e4SLinus Torvalds * the status of the initial analysis ccw before it frees it and kicks 7551da177e4SLinus Torvalds * the device to continue the startup sequence. This will call 7561da177e4SLinus Torvalds * dasd_eckd_do_analysis again (if the devices has not been marked 7571da177e4SLinus Torvalds * for deletion in the meantime). 7581da177e4SLinus Torvalds */ 7591da177e4SLinus Torvalds static void 7601da177e4SLinus Torvalds dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, void *data) 7611da177e4SLinus Torvalds { 7621da177e4SLinus Torvalds struct dasd_eckd_private *private; 7631da177e4SLinus Torvalds struct dasd_device *device; 7641da177e4SLinus Torvalds 7651da177e4SLinus Torvalds device = init_cqr->device; 7661da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 7671da177e4SLinus Torvalds private->init_cqr_status = init_cqr->status; 7681da177e4SLinus Torvalds dasd_sfree_request(init_cqr, device); 7691da177e4SLinus Torvalds dasd_kick_device(device); 7701da177e4SLinus Torvalds } 7711da177e4SLinus Torvalds 7721da177e4SLinus Torvalds static int 7731da177e4SLinus Torvalds dasd_eckd_start_analysis(struct dasd_device *device) 7741da177e4SLinus Torvalds { 7751da177e4SLinus Torvalds struct dasd_eckd_private *private; 7761da177e4SLinus Torvalds struct dasd_ccw_req *init_cqr; 7771da177e4SLinus Torvalds 7781da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 7791da177e4SLinus Torvalds init_cqr = dasd_eckd_analysis_ccw(device); 7801da177e4SLinus Torvalds if (IS_ERR(init_cqr)) 7811da177e4SLinus Torvalds return PTR_ERR(init_cqr); 7821da177e4SLinus Torvalds init_cqr->callback = dasd_eckd_analysis_callback; 7831da177e4SLinus Torvalds init_cqr->callback_data = NULL; 7841da177e4SLinus Torvalds init_cqr->expires = 5*HZ; 7851da177e4SLinus Torvalds dasd_add_request_head(init_cqr); 7861da177e4SLinus Torvalds return -EAGAIN; 7871da177e4SLinus Torvalds } 7881da177e4SLinus Torvalds 7891da177e4SLinus Torvalds static int 7901da177e4SLinus Torvalds dasd_eckd_end_analysis(struct dasd_device *device) 7911da177e4SLinus Torvalds { 7921da177e4SLinus Torvalds struct dasd_eckd_private *private; 7931da177e4SLinus Torvalds struct eckd_count *count_area; 7941da177e4SLinus Torvalds unsigned int sb, blk_per_trk; 7951da177e4SLinus Torvalds int status, i; 7961da177e4SLinus Torvalds 7971da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 7981da177e4SLinus Torvalds status = private->init_cqr_status; 7991da177e4SLinus Torvalds private->init_cqr_status = -1; 8001da177e4SLinus Torvalds if (status != DASD_CQR_DONE) { 8011da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 8021da177e4SLinus Torvalds "volume analysis returned unformatted disk"); 8031da177e4SLinus Torvalds return -EMEDIUMTYPE; 8041da177e4SLinus Torvalds } 8051da177e4SLinus Torvalds 8061da177e4SLinus Torvalds private->uses_cdl = 1; 8071da177e4SLinus Torvalds /* Calculate number of blocks/records per track. */ 8081da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, device->bp_block); 8091da177e4SLinus Torvalds /* Check Track 0 for Compatible Disk Layout */ 8101da177e4SLinus Torvalds count_area = NULL; 8111da177e4SLinus Torvalds for (i = 0; i < 3; i++) { 8121da177e4SLinus Torvalds if (private->count_area[i].kl != 4 || 8131da177e4SLinus Torvalds private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4) { 8141da177e4SLinus Torvalds private->uses_cdl = 0; 8151da177e4SLinus Torvalds break; 8161da177e4SLinus Torvalds } 8171da177e4SLinus Torvalds } 8181da177e4SLinus Torvalds if (i == 3) 8191da177e4SLinus Torvalds count_area = &private->count_area[4]; 8201da177e4SLinus Torvalds 8211da177e4SLinus Torvalds if (private->uses_cdl == 0) { 8221da177e4SLinus Torvalds for (i = 0; i < 5; i++) { 8231da177e4SLinus Torvalds if ((private->count_area[i].kl != 0) || 8241da177e4SLinus Torvalds (private->count_area[i].dl != 8251da177e4SLinus Torvalds private->count_area[0].dl)) 8261da177e4SLinus Torvalds break; 8271da177e4SLinus Torvalds } 8281da177e4SLinus Torvalds if (i == 5) 8291da177e4SLinus Torvalds count_area = &private->count_area[0]; 8301da177e4SLinus Torvalds } else { 8311da177e4SLinus Torvalds if (private->count_area[3].record == 1) 8321da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 8331da177e4SLinus Torvalds "Trk 0: no records after VTOC!"); 8341da177e4SLinus Torvalds } 8351da177e4SLinus Torvalds if (count_area != NULL && count_area->kl == 0) { 8361da177e4SLinus Torvalds /* we found notthing violating our disk layout */ 8371da177e4SLinus Torvalds if (dasd_check_blocksize(count_area->dl) == 0) 8381da177e4SLinus Torvalds device->bp_block = count_area->dl; 8391da177e4SLinus Torvalds } 8401da177e4SLinus Torvalds if (device->bp_block == 0) { 8411da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 8421da177e4SLinus Torvalds "Volume has incompatible disk layout"); 8431da177e4SLinus Torvalds return -EMEDIUMTYPE; 8441da177e4SLinus Torvalds } 8451da177e4SLinus Torvalds device->s2b_shift = 0; /* bits to shift 512 to get a block */ 8461da177e4SLinus Torvalds for (sb = 512; sb < device->bp_block; sb = sb << 1) 8471da177e4SLinus Torvalds device->s2b_shift++; 8481da177e4SLinus Torvalds 8491da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, device->bp_block); 8501da177e4SLinus Torvalds device->blocks = (private->rdc_data.no_cyl * 8511da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 8521da177e4SLinus Torvalds blk_per_trk); 8531da177e4SLinus Torvalds 8541da177e4SLinus Torvalds DEV_MESSAGE(KERN_INFO, device, 8551da177e4SLinus Torvalds "(%dkB blks): %dkB at %dkB/trk %s", 8561da177e4SLinus Torvalds (device->bp_block >> 10), 8571da177e4SLinus Torvalds ((private->rdc_data.no_cyl * 8581da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 8591da177e4SLinus Torvalds blk_per_trk * (device->bp_block >> 9)) >> 1), 8601da177e4SLinus Torvalds ((blk_per_trk * device->bp_block) >> 10), 8611da177e4SLinus Torvalds private->uses_cdl ? 8621da177e4SLinus Torvalds "compatible disk layout" : "linux disk layout"); 8631da177e4SLinus Torvalds 8641da177e4SLinus Torvalds return 0; 8651da177e4SLinus Torvalds } 8661da177e4SLinus Torvalds 8671da177e4SLinus Torvalds static int 8681da177e4SLinus Torvalds dasd_eckd_do_analysis(struct dasd_device *device) 8691da177e4SLinus Torvalds { 8701da177e4SLinus Torvalds struct dasd_eckd_private *private; 8711da177e4SLinus Torvalds 8721da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 8731da177e4SLinus Torvalds if (private->init_cqr_status < 0) 8741da177e4SLinus Torvalds return dasd_eckd_start_analysis(device); 8751da177e4SLinus Torvalds else 8761da177e4SLinus Torvalds return dasd_eckd_end_analysis(device); 8771da177e4SLinus Torvalds } 8781da177e4SLinus Torvalds 8791da177e4SLinus Torvalds static int 8801da177e4SLinus Torvalds dasd_eckd_fill_geometry(struct dasd_device *device, struct hd_geometry *geo) 8811da177e4SLinus Torvalds { 8821da177e4SLinus Torvalds struct dasd_eckd_private *private; 8831da177e4SLinus Torvalds 8841da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 8851da177e4SLinus Torvalds if (dasd_check_blocksize(device->bp_block) == 0) { 8861da177e4SLinus Torvalds geo->sectors = recs_per_track(&private->rdc_data, 8871da177e4SLinus Torvalds 0, device->bp_block); 8881da177e4SLinus Torvalds } 8891da177e4SLinus Torvalds geo->cylinders = private->rdc_data.no_cyl; 8901da177e4SLinus Torvalds geo->heads = private->rdc_data.trk_per_cyl; 8911da177e4SLinus Torvalds return 0; 8921da177e4SLinus Torvalds } 8931da177e4SLinus Torvalds 8941da177e4SLinus Torvalds static struct dasd_ccw_req * 8951da177e4SLinus Torvalds dasd_eckd_format_device(struct dasd_device * device, 8961da177e4SLinus Torvalds struct format_data_t * fdata) 8971da177e4SLinus Torvalds { 8981da177e4SLinus Torvalds struct dasd_eckd_private *private; 8991da177e4SLinus Torvalds struct dasd_ccw_req *fcp; 9001da177e4SLinus Torvalds struct eckd_count *ect; 9011da177e4SLinus Torvalds struct ccw1 *ccw; 9021da177e4SLinus Torvalds void *data; 9031da177e4SLinus Torvalds int rpt, cyl, head; 9041da177e4SLinus Torvalds int cplength, datasize; 9051da177e4SLinus Torvalds int i; 9061da177e4SLinus Torvalds 9071da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 9081da177e4SLinus Torvalds rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize); 9091da177e4SLinus Torvalds cyl = fdata->start_unit / private->rdc_data.trk_per_cyl; 9101da177e4SLinus Torvalds head = fdata->start_unit % private->rdc_data.trk_per_cyl; 9111da177e4SLinus Torvalds 9121da177e4SLinus Torvalds /* Sanity checks. */ 9131da177e4SLinus Torvalds if (fdata->start_unit >= 9141da177e4SLinus Torvalds (private->rdc_data.no_cyl * private->rdc_data.trk_per_cyl)) { 9151da177e4SLinus Torvalds DEV_MESSAGE(KERN_INFO, device, "Track no %d too big!", 9161da177e4SLinus Torvalds fdata->start_unit); 9171da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 9181da177e4SLinus Torvalds } 9191da177e4SLinus Torvalds if (fdata->start_unit > fdata->stop_unit) { 9201da177e4SLinus Torvalds DEV_MESSAGE(KERN_INFO, device, "Track %d reached! ending.", 9211da177e4SLinus Torvalds fdata->start_unit); 9221da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 9231da177e4SLinus Torvalds } 9241da177e4SLinus Torvalds if (dasd_check_blocksize(fdata->blksize) != 0) { 9251da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, 9261da177e4SLinus Torvalds "Invalid blocksize %d...terminating!", 9271da177e4SLinus Torvalds fdata->blksize); 9281da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 9291da177e4SLinus Torvalds } 9301da177e4SLinus Torvalds 9311da177e4SLinus Torvalds /* 9321da177e4SLinus Torvalds * fdata->intensity is a bit string that tells us what to do: 9331da177e4SLinus Torvalds * Bit 0: write record zero 9341da177e4SLinus Torvalds * Bit 1: write home address, currently not supported 9351da177e4SLinus Torvalds * Bit 2: invalidate tracks 9361da177e4SLinus Torvalds * Bit 3: use OS/390 compatible disk layout (cdl) 9371da177e4SLinus Torvalds * Only some bit combinations do make sense. 9381da177e4SLinus Torvalds */ 9391da177e4SLinus Torvalds switch (fdata->intensity) { 9401da177e4SLinus Torvalds case 0x00: /* Normal format */ 9411da177e4SLinus Torvalds case 0x08: /* Normal format, use cdl. */ 9421da177e4SLinus Torvalds cplength = 2 + rpt; 9431da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 9441da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 9451da177e4SLinus Torvalds rpt * sizeof(struct eckd_count); 9461da177e4SLinus Torvalds break; 9471da177e4SLinus Torvalds case 0x01: /* Write record zero and format track. */ 9481da177e4SLinus Torvalds case 0x09: /* Write record zero and format track, use cdl. */ 9491da177e4SLinus Torvalds cplength = 3 + rpt; 9501da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 9511da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 9521da177e4SLinus Torvalds sizeof(struct eckd_count) + 9531da177e4SLinus Torvalds rpt * sizeof(struct eckd_count); 9541da177e4SLinus Torvalds break; 9551da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 9561da177e4SLinus Torvalds case 0x0c: /* Invalidate track, use cdl. */ 9571da177e4SLinus Torvalds cplength = 3; 9581da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 9591da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 9601da177e4SLinus Torvalds sizeof(struct eckd_count); 9611da177e4SLinus Torvalds break; 9621da177e4SLinus Torvalds default: 9631da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "Invalid flags 0x%x.", 9641da177e4SLinus Torvalds fdata->intensity); 9651da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 9661da177e4SLinus Torvalds } 9671da177e4SLinus Torvalds /* Allocate the format ccw request. */ 9681da177e4SLinus Torvalds fcp = dasd_smalloc_request(dasd_eckd_discipline.name, 9691da177e4SLinus Torvalds cplength, datasize, device); 9701da177e4SLinus Torvalds if (IS_ERR(fcp)) 9711da177e4SLinus Torvalds return fcp; 9721da177e4SLinus Torvalds 9731da177e4SLinus Torvalds data = fcp->data; 9741da177e4SLinus Torvalds ccw = fcp->cpaddr; 9751da177e4SLinus Torvalds 9761da177e4SLinus Torvalds switch (fdata->intensity & ~0x08) { 9771da177e4SLinus Torvalds case 0x00: /* Normal format. */ 9781da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 9791da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 9801da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device); 9811da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 9821da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 9831da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 9841da177e4SLinus Torvalds fdata->start_unit, 0, rpt, 9851da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device, 9861da177e4SLinus Torvalds fdata->blksize); 9871da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 9881da177e4SLinus Torvalds break; 9891da177e4SLinus Torvalds case 0x01: /* Write record zero + format track. */ 9901da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 9911da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 9921da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, 9931da177e4SLinus Torvalds device); 9941da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 9951da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 9961da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 9971da177e4SLinus Torvalds fdata->start_unit, 0, rpt + 1, 9981da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, device, 9991da177e4SLinus Torvalds device->bp_block); 10001da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 10011da177e4SLinus Torvalds break; 10021da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 10031da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 10041da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 10051da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device); 10061da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 10071da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 10081da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 10091da177e4SLinus Torvalds fdata->start_unit, 0, 1, 10101da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device, 8); 10111da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 10121da177e4SLinus Torvalds break; 10131da177e4SLinus Torvalds } 10141da177e4SLinus Torvalds if (fdata->intensity & 0x01) { /* write record zero */ 10151da177e4SLinus Torvalds ect = (struct eckd_count *) data; 10161da177e4SLinus Torvalds data += sizeof(struct eckd_count); 10171da177e4SLinus Torvalds ect->cyl = cyl; 10181da177e4SLinus Torvalds ect->head = head; 10191da177e4SLinus Torvalds ect->record = 0; 10201da177e4SLinus Torvalds ect->kl = 0; 10211da177e4SLinus Torvalds ect->dl = 8; 10221da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 10231da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 10241da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 10251da177e4SLinus Torvalds ccw->count = 8; 10261da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 10271da177e4SLinus Torvalds ccw++; 10281da177e4SLinus Torvalds } 10291da177e4SLinus Torvalds if ((fdata->intensity & ~0x08) & 0x04) { /* erase track */ 10301da177e4SLinus Torvalds ect = (struct eckd_count *) data; 10311da177e4SLinus Torvalds data += sizeof(struct eckd_count); 10321da177e4SLinus Torvalds ect->cyl = cyl; 10331da177e4SLinus Torvalds ect->head = head; 10341da177e4SLinus Torvalds ect->record = 1; 10351da177e4SLinus Torvalds ect->kl = 0; 10361da177e4SLinus Torvalds ect->dl = 0; 10371da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 10381da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 10391da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 10401da177e4SLinus Torvalds ccw->count = 8; 10411da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 10421da177e4SLinus Torvalds } else { /* write remaining records */ 10431da177e4SLinus Torvalds for (i = 0; i < rpt; i++) { 10441da177e4SLinus Torvalds ect = (struct eckd_count *) data; 10451da177e4SLinus Torvalds data += sizeof(struct eckd_count); 10461da177e4SLinus Torvalds ect->cyl = cyl; 10471da177e4SLinus Torvalds ect->head = head; 10481da177e4SLinus Torvalds ect->record = i + 1; 10491da177e4SLinus Torvalds ect->kl = 0; 10501da177e4SLinus Torvalds ect->dl = fdata->blksize; 10511da177e4SLinus Torvalds /* Check for special tracks 0-1 when formatting CDL */ 10521da177e4SLinus Torvalds if ((fdata->intensity & 0x08) && 10531da177e4SLinus Torvalds fdata->start_unit == 0) { 10541da177e4SLinus Torvalds if (i < 3) { 10551da177e4SLinus Torvalds ect->kl = 4; 10561da177e4SLinus Torvalds ect->dl = sizes_trk0[i] - 4; 10571da177e4SLinus Torvalds } 10581da177e4SLinus Torvalds } 10591da177e4SLinus Torvalds if ((fdata->intensity & 0x08) && 10601da177e4SLinus Torvalds fdata->start_unit == 1) { 10611da177e4SLinus Torvalds ect->kl = 44; 10621da177e4SLinus Torvalds ect->dl = LABEL_SIZE - 44; 10631da177e4SLinus Torvalds } 10641da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 10651da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 10661da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 10671da177e4SLinus Torvalds ccw->count = 8; 10681da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 10691da177e4SLinus Torvalds ccw++; 10701da177e4SLinus Torvalds } 10711da177e4SLinus Torvalds } 10721da177e4SLinus Torvalds fcp->device = device; 10731da177e4SLinus Torvalds fcp->retries = 2; /* set retry counter to enable ERP */ 10741da177e4SLinus Torvalds fcp->buildclk = get_clock(); 10751da177e4SLinus Torvalds fcp->status = DASD_CQR_FILLED; 10761da177e4SLinus Torvalds return fcp; 10771da177e4SLinus Torvalds } 10781da177e4SLinus Torvalds 10791da177e4SLinus Torvalds static dasd_era_t 10801da177e4SLinus Torvalds dasd_eckd_examine_error(struct dasd_ccw_req * cqr, struct irb * irb) 10811da177e4SLinus Torvalds { 10821da177e4SLinus Torvalds struct dasd_device *device = (struct dasd_device *) cqr->device; 10831da177e4SLinus Torvalds struct ccw_device *cdev = device->cdev; 10841da177e4SLinus Torvalds 10851da177e4SLinus Torvalds if (irb->scsw.cstat == 0x00 && 10861da177e4SLinus Torvalds irb->scsw.dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END)) 10871da177e4SLinus Torvalds return dasd_era_none; 10881da177e4SLinus Torvalds 10891da177e4SLinus Torvalds switch (cdev->id.cu_type) { 10901da177e4SLinus Torvalds case 0x3990: 10911da177e4SLinus Torvalds case 0x2105: 10921da177e4SLinus Torvalds case 0x2107: 10931da177e4SLinus Torvalds case 0x1750: 10941da177e4SLinus Torvalds return dasd_3990_erp_examine(cqr, irb); 10951da177e4SLinus Torvalds case 0x9343: 10961da177e4SLinus Torvalds return dasd_9343_erp_examine(cqr, irb); 10971da177e4SLinus Torvalds case 0x3880: 10981da177e4SLinus Torvalds default: 10991da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 11001da177e4SLinus Torvalds "default (unknown CU type) - RECOVERABLE return"); 11011da177e4SLinus Torvalds return dasd_era_recover; 11021da177e4SLinus Torvalds } 11031da177e4SLinus Torvalds } 11041da177e4SLinus Torvalds 11051da177e4SLinus Torvalds static dasd_erp_fn_t 11061da177e4SLinus Torvalds dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 11071da177e4SLinus Torvalds { 11081da177e4SLinus Torvalds struct dasd_device *device = (struct dasd_device *) cqr->device; 11091da177e4SLinus Torvalds struct ccw_device *cdev = device->cdev; 11101da177e4SLinus Torvalds 11111da177e4SLinus Torvalds switch (cdev->id.cu_type) { 11121da177e4SLinus Torvalds case 0x3990: 11131da177e4SLinus Torvalds case 0x2105: 11141da177e4SLinus Torvalds case 0x2107: 11151da177e4SLinus Torvalds case 0x1750: 11161da177e4SLinus Torvalds return dasd_3990_erp_action; 11171da177e4SLinus Torvalds case 0x9343: 11181da177e4SLinus Torvalds case 0x3880: 11191da177e4SLinus Torvalds default: 11201da177e4SLinus Torvalds return dasd_default_erp_action; 11211da177e4SLinus Torvalds } 11221da177e4SLinus Torvalds } 11231da177e4SLinus Torvalds 11241da177e4SLinus Torvalds static dasd_erp_fn_t 11251da177e4SLinus Torvalds dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 11261da177e4SLinus Torvalds { 11271da177e4SLinus Torvalds return dasd_default_erp_postaction; 11281da177e4SLinus Torvalds } 11291da177e4SLinus Torvalds 11301da177e4SLinus Torvalds static struct dasd_ccw_req * 11311da177e4SLinus Torvalds dasd_eckd_build_cp(struct dasd_device * device, struct request *req) 11321da177e4SLinus Torvalds { 11331da177e4SLinus Torvalds struct dasd_eckd_private *private; 11341da177e4SLinus Torvalds unsigned long *idaws; 11351da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 11361da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 11371da177e4SLinus Torvalds struct ccw1 *ccw; 11381da177e4SLinus Torvalds struct bio *bio; 11391da177e4SLinus Torvalds struct bio_vec *bv; 11401da177e4SLinus Torvalds char *dst; 11411da177e4SLinus Torvalds unsigned int blksize, blk_per_trk, off; 11421da177e4SLinus Torvalds int count, cidaw, cplength, datasize; 11431da177e4SLinus Torvalds sector_t recid, first_rec, last_rec; 11441da177e4SLinus Torvalds sector_t first_trk, last_trk; 11451da177e4SLinus Torvalds unsigned int first_offs, last_offs; 11461da177e4SLinus Torvalds unsigned char cmd, rcmd; 11471da177e4SLinus Torvalds int i; 11481da177e4SLinus Torvalds 11491da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 11501da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 11511da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_READ_MT; 11521da177e4SLinus Torvalds else if (rq_data_dir(req) == WRITE) 11531da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_WRITE_MT; 11541da177e4SLinus Torvalds else 11551da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 11561da177e4SLinus Torvalds /* Calculate number of blocks/records per track. */ 11571da177e4SLinus Torvalds blksize = device->bp_block; 11581da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 11591da177e4SLinus Torvalds /* Calculate record id of first and last block. */ 11601da177e4SLinus Torvalds first_rec = first_trk = req->sector >> device->s2b_shift; 11611da177e4SLinus Torvalds first_offs = sector_div(first_trk, blk_per_trk); 11621da177e4SLinus Torvalds last_rec = last_trk = 11631da177e4SLinus Torvalds (req->sector + req->nr_sectors - 1) >> device->s2b_shift; 11641da177e4SLinus Torvalds last_offs = sector_div(last_trk, blk_per_trk); 11651da177e4SLinus Torvalds /* Check struct bio and count the number of blocks for the request. */ 11661da177e4SLinus Torvalds count = 0; 11671da177e4SLinus Torvalds cidaw = 0; 11681da177e4SLinus Torvalds rq_for_each_bio(bio, req) { 11691da177e4SLinus Torvalds bio_for_each_segment(bv, bio, i) { 11701da177e4SLinus Torvalds if (bv->bv_len & (blksize - 1)) 11711da177e4SLinus Torvalds /* Eckd can only do full blocks. */ 11721da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 11731da177e4SLinus Torvalds count += bv->bv_len >> (device->s2b_shift + 9); 1174347a8dc3SMartin Schwidefsky #if defined(CONFIG_64BIT) 11751da177e4SLinus Torvalds if (idal_is_needed (page_address(bv->bv_page), 11761da177e4SLinus Torvalds bv->bv_len)) 11771da177e4SLinus Torvalds cidaw += bv->bv_len >> (device->s2b_shift + 9); 11781da177e4SLinus Torvalds #endif 11791da177e4SLinus Torvalds } 11801da177e4SLinus Torvalds } 11811da177e4SLinus Torvalds /* Paranoia. */ 11821da177e4SLinus Torvalds if (count != last_rec - first_rec + 1) 11831da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 11841da177e4SLinus Torvalds /* 1x define extent + 1x locate record + number of blocks */ 11851da177e4SLinus Torvalds cplength = 2 + count; 11861da177e4SLinus Torvalds /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 11871da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + sizeof(struct LO_eckd_data) + 11881da177e4SLinus Torvalds cidaw * sizeof(unsigned long); 11891da177e4SLinus Torvalds /* Find out the number of additional locate record ccws for cdl. */ 11901da177e4SLinus Torvalds if (private->uses_cdl && first_rec < 2*blk_per_trk) { 11911da177e4SLinus Torvalds if (last_rec >= 2*blk_per_trk) 11921da177e4SLinus Torvalds count = 2*blk_per_trk - first_rec; 11931da177e4SLinus Torvalds cplength += count; 11941da177e4SLinus Torvalds datasize += count*sizeof(struct LO_eckd_data); 11951da177e4SLinus Torvalds } 11961da177e4SLinus Torvalds /* Allocate the ccw request. */ 11971da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 11981da177e4SLinus Torvalds cplength, datasize, device); 11991da177e4SLinus Torvalds if (IS_ERR(cqr)) 12001da177e4SLinus Torvalds return cqr; 12011da177e4SLinus Torvalds ccw = cqr->cpaddr; 12021da177e4SLinus Torvalds /* First ccw is define extent. */ 12031da177e4SLinus Torvalds define_extent(ccw++, cqr->data, first_trk, last_trk, cmd, device); 12041da177e4SLinus Torvalds /* Build locate_record+read/write/ccws. */ 12051da177e4SLinus Torvalds idaws = (unsigned long *) (cqr->data + sizeof(struct DE_eckd_data)); 12061da177e4SLinus Torvalds LO_data = (struct LO_eckd_data *) (idaws + cidaw); 12071da177e4SLinus Torvalds recid = first_rec; 12081da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 12091da177e4SLinus Torvalds /* Only standard blocks so there is just one locate record. */ 12101da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 12111da177e4SLinus Torvalds locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 12121da177e4SLinus Torvalds last_rec - recid + 1, cmd, device, blksize); 12131da177e4SLinus Torvalds } 12141da177e4SLinus Torvalds rq_for_each_bio(bio, req) bio_for_each_segment(bv, bio, i) { 12151da177e4SLinus Torvalds dst = page_address(bv->bv_page) + bv->bv_offset; 12161da177e4SLinus Torvalds if (dasd_page_cache) { 12171da177e4SLinus Torvalds char *copy = kmem_cache_alloc(dasd_page_cache, 12181da177e4SLinus Torvalds SLAB_DMA | __GFP_NOWARN); 12191da177e4SLinus Torvalds if (copy && rq_data_dir(req) == WRITE) 12201da177e4SLinus Torvalds memcpy(copy + bv->bv_offset, dst, bv->bv_len); 12211da177e4SLinus Torvalds if (copy) 12221da177e4SLinus Torvalds dst = copy + bv->bv_offset; 12231da177e4SLinus Torvalds } 12241da177e4SLinus Torvalds for (off = 0; off < bv->bv_len; off += blksize) { 12251da177e4SLinus Torvalds sector_t trkid = recid; 12261da177e4SLinus Torvalds unsigned int recoffs = sector_div(trkid, blk_per_trk); 12271da177e4SLinus Torvalds rcmd = cmd; 12281da177e4SLinus Torvalds count = blksize; 12291da177e4SLinus Torvalds /* Locate record for cdl special block ? */ 12301da177e4SLinus Torvalds if (private->uses_cdl && recid < 2*blk_per_trk) { 12311da177e4SLinus Torvalds if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 12321da177e4SLinus Torvalds rcmd |= 0x8; 12331da177e4SLinus Torvalds count = dasd_eckd_cdl_reclen(recid); 1234ec5883abSHorst Hummel if (count < blksize && 1235ec5883abSHorst Hummel rq_data_dir(req) == READ) 12361da177e4SLinus Torvalds memset(dst + count, 0xe5, 12371da177e4SLinus Torvalds blksize - count); 12381da177e4SLinus Torvalds } 12391da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 12401da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 12411da177e4SLinus Torvalds trkid, recoffs + 1, 12421da177e4SLinus Torvalds 1, rcmd, device, count); 12431da177e4SLinus Torvalds } 12441da177e4SLinus Torvalds /* Locate record for standard blocks ? */ 12451da177e4SLinus Torvalds if (private->uses_cdl && recid == 2*blk_per_trk) { 12461da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 12471da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 12481da177e4SLinus Torvalds trkid, recoffs + 1, 12491da177e4SLinus Torvalds last_rec - recid + 1, 12501da177e4SLinus Torvalds cmd, device, count); 12511da177e4SLinus Torvalds } 12521da177e4SLinus Torvalds /* Read/write ccw. */ 12531da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 12541da177e4SLinus Torvalds ccw->cmd_code = rcmd; 12551da177e4SLinus Torvalds ccw->count = count; 12561da177e4SLinus Torvalds if (idal_is_needed(dst, blksize)) { 12571da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) idaws; 12581da177e4SLinus Torvalds ccw->flags = CCW_FLAG_IDA; 12591da177e4SLinus Torvalds idaws = idal_create_words(idaws, dst, blksize); 12601da177e4SLinus Torvalds } else { 12611da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) dst; 12621da177e4SLinus Torvalds ccw->flags = 0; 12631da177e4SLinus Torvalds } 12641da177e4SLinus Torvalds ccw++; 12651da177e4SLinus Torvalds dst += blksize; 12661da177e4SLinus Torvalds recid++; 12671da177e4SLinus Torvalds } 12681da177e4SLinus Torvalds } 12691c01b8a5SHorst Hummel if (req->flags & REQ_FAILFAST) 12701c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 12711da177e4SLinus Torvalds cqr->device = device; 12721da177e4SLinus Torvalds cqr->expires = 5 * 60 * HZ; /* 5 minutes */ 12731da177e4SLinus Torvalds cqr->lpm = private->path_data.ppm; 12741da177e4SLinus Torvalds cqr->retries = 256; 12751da177e4SLinus Torvalds cqr->buildclk = get_clock(); 12761da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 12771da177e4SLinus Torvalds return cqr; 12781da177e4SLinus Torvalds } 12791da177e4SLinus Torvalds 12801da177e4SLinus Torvalds static int 12811da177e4SLinus Torvalds dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 12821da177e4SLinus Torvalds { 12831da177e4SLinus Torvalds struct dasd_eckd_private *private; 12841da177e4SLinus Torvalds struct ccw1 *ccw; 12851da177e4SLinus Torvalds struct bio *bio; 12861da177e4SLinus Torvalds struct bio_vec *bv; 12871da177e4SLinus Torvalds char *dst, *cda; 12881da177e4SLinus Torvalds unsigned int blksize, blk_per_trk, off; 12891da177e4SLinus Torvalds sector_t recid; 12901da177e4SLinus Torvalds int i, status; 12911da177e4SLinus Torvalds 12921da177e4SLinus Torvalds if (!dasd_page_cache) 12931da177e4SLinus Torvalds goto out; 12941da177e4SLinus Torvalds private = (struct dasd_eckd_private *) cqr->device->private; 12951da177e4SLinus Torvalds blksize = cqr->device->bp_block; 12961da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 12971da177e4SLinus Torvalds recid = req->sector >> cqr->device->s2b_shift; 12981da177e4SLinus Torvalds ccw = cqr->cpaddr; 12991da177e4SLinus Torvalds /* Skip over define extent & locate record. */ 13001da177e4SLinus Torvalds ccw++; 13011da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 13021da177e4SLinus Torvalds ccw++; 13031da177e4SLinus Torvalds rq_for_each_bio(bio, req) bio_for_each_segment(bv, bio, i) { 13041da177e4SLinus Torvalds dst = page_address(bv->bv_page) + bv->bv_offset; 13051da177e4SLinus Torvalds for (off = 0; off < bv->bv_len; off += blksize) { 13061da177e4SLinus Torvalds /* Skip locate record. */ 13071da177e4SLinus Torvalds if (private->uses_cdl && recid <= 2*blk_per_trk) 13081da177e4SLinus Torvalds ccw++; 13091da177e4SLinus Torvalds if (dst) { 13101da177e4SLinus Torvalds if (ccw->flags & CCW_FLAG_IDA) 13111da177e4SLinus Torvalds cda = *((char **)((addr_t) ccw->cda)); 13121da177e4SLinus Torvalds else 13131da177e4SLinus Torvalds cda = (char *)((addr_t) ccw->cda); 13141da177e4SLinus Torvalds if (dst != cda) { 13151da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 13161da177e4SLinus Torvalds memcpy(dst, cda, bv->bv_len); 13171da177e4SLinus Torvalds kmem_cache_free(dasd_page_cache, 13181da177e4SLinus Torvalds (void *)((addr_t)cda & PAGE_MASK)); 13191da177e4SLinus Torvalds } 13201da177e4SLinus Torvalds dst = NULL; 13211da177e4SLinus Torvalds } 13221da177e4SLinus Torvalds ccw++; 13231da177e4SLinus Torvalds recid++; 13241da177e4SLinus Torvalds } 13251da177e4SLinus Torvalds } 13261da177e4SLinus Torvalds out: 13271da177e4SLinus Torvalds status = cqr->status == DASD_CQR_DONE; 13281da177e4SLinus Torvalds dasd_sfree_request(cqr, cqr->device); 13291da177e4SLinus Torvalds return status; 13301da177e4SLinus Torvalds } 13311da177e4SLinus Torvalds 13321da177e4SLinus Torvalds static int 13331da177e4SLinus Torvalds dasd_eckd_fill_info(struct dasd_device * device, 13341da177e4SLinus Torvalds struct dasd_information2_t * info) 13351da177e4SLinus Torvalds { 13361da177e4SLinus Torvalds struct dasd_eckd_private *private; 13371da177e4SLinus Torvalds 13381da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 13391da177e4SLinus Torvalds info->label_block = 2; 13401da177e4SLinus Torvalds info->FBA_layout = private->uses_cdl ? 0 : 1; 13411da177e4SLinus Torvalds info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 13421da177e4SLinus Torvalds info->characteristics_size = sizeof(struct dasd_eckd_characteristics); 13431da177e4SLinus Torvalds memcpy(info->characteristics, &private->rdc_data, 13441da177e4SLinus Torvalds sizeof(struct dasd_eckd_characteristics)); 13451da177e4SLinus Torvalds info->confdata_size = sizeof (struct dasd_eckd_confdata); 13461da177e4SLinus Torvalds memcpy(info->configuration_data, &private->conf_data, 13471da177e4SLinus Torvalds sizeof (struct dasd_eckd_confdata)); 13481da177e4SLinus Torvalds return 0; 13491da177e4SLinus Torvalds } 13501da177e4SLinus Torvalds 13511da177e4SLinus Torvalds /* 13521da177e4SLinus Torvalds * SECTION: ioctl functions for eckd devices. 13531da177e4SLinus Torvalds */ 13541da177e4SLinus Torvalds 13551da177e4SLinus Torvalds /* 13561da177e4SLinus Torvalds * Release device ioctl. 13571da177e4SLinus Torvalds * Buils a channel programm to releases a prior reserved 13581da177e4SLinus Torvalds * (see dasd_eckd_reserve) device. 13591da177e4SLinus Torvalds */ 13601da177e4SLinus Torvalds static int 13611107ccfbSChristoph Hellwig dasd_eckd_release(struct dasd_device *device) 13621da177e4SLinus Torvalds { 13631da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 13641da177e4SLinus Torvalds int rc; 13651da177e4SLinus Torvalds 13661da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 13671da177e4SLinus Torvalds return -EACCES; 13681da177e4SLinus Torvalds 13691da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 13701da177e4SLinus Torvalds 1, 32, device); 13711da177e4SLinus Torvalds if (IS_ERR(cqr)) { 13721da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 13731da177e4SLinus Torvalds "Could not allocate initialization request"); 13741da177e4SLinus Torvalds return PTR_ERR(cqr); 13751da177e4SLinus Torvalds } 13761da177e4SLinus Torvalds cqr->cpaddr->cmd_code = DASD_ECKD_CCW_RELEASE; 13771da177e4SLinus Torvalds cqr->cpaddr->flags |= CCW_FLAG_SLI; 13781da177e4SLinus Torvalds cqr->cpaddr->count = 32; 13791da177e4SLinus Torvalds cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; 13801da177e4SLinus Torvalds cqr->device = device; 13811da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 13821c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 13831da177e4SLinus Torvalds cqr->retries = 0; 13841da177e4SLinus Torvalds cqr->expires = 2 * HZ; 13851da177e4SLinus Torvalds cqr->buildclk = get_clock(); 13861da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 13871da177e4SLinus Torvalds 13881da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 13891da177e4SLinus Torvalds 13901da177e4SLinus Torvalds dasd_sfree_request(cqr, cqr->device); 13911da177e4SLinus Torvalds return rc; 13921da177e4SLinus Torvalds } 13931da177e4SLinus Torvalds 13941da177e4SLinus Torvalds /* 13951da177e4SLinus Torvalds * Reserve device ioctl. 13961da177e4SLinus Torvalds * Options are set to 'synchronous wait for interrupt' and 13971da177e4SLinus Torvalds * 'timeout the request'. This leads to a terminate IO if 13981da177e4SLinus Torvalds * the interrupt is outstanding for a certain time. 13991da177e4SLinus Torvalds */ 14001da177e4SLinus Torvalds static int 14011107ccfbSChristoph Hellwig dasd_eckd_reserve(struct dasd_device *device) 14021da177e4SLinus Torvalds { 14031da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 14041da177e4SLinus Torvalds int rc; 14051da177e4SLinus Torvalds 14061da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 14071da177e4SLinus Torvalds return -EACCES; 14081da177e4SLinus Torvalds 14091da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 14101da177e4SLinus Torvalds 1, 32, device); 14111da177e4SLinus Torvalds if (IS_ERR(cqr)) { 14121da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 14131da177e4SLinus Torvalds "Could not allocate initialization request"); 14141da177e4SLinus Torvalds return PTR_ERR(cqr); 14151da177e4SLinus Torvalds } 14161da177e4SLinus Torvalds cqr->cpaddr->cmd_code = DASD_ECKD_CCW_RESERVE; 14171da177e4SLinus Torvalds cqr->cpaddr->flags |= CCW_FLAG_SLI; 14181da177e4SLinus Torvalds cqr->cpaddr->count = 32; 14191da177e4SLinus Torvalds cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; 14201da177e4SLinus Torvalds cqr->device = device; 14211da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 14221c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 14231da177e4SLinus Torvalds cqr->retries = 0; 14241da177e4SLinus Torvalds cqr->expires = 2 * HZ; 14251da177e4SLinus Torvalds cqr->buildclk = get_clock(); 14261da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 14271da177e4SLinus Torvalds 14281da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 14291da177e4SLinus Torvalds 14301da177e4SLinus Torvalds dasd_sfree_request(cqr, cqr->device); 14311da177e4SLinus Torvalds return rc; 14321da177e4SLinus Torvalds } 14331da177e4SLinus Torvalds 14341da177e4SLinus Torvalds /* 14351da177e4SLinus Torvalds * Steal lock ioctl - unconditional reserve device. 14361da177e4SLinus Torvalds * Buils a channel programm to break a device's reservation. 14371da177e4SLinus Torvalds * (unconditional reserve) 14381da177e4SLinus Torvalds */ 14391da177e4SLinus Torvalds static int 14401107ccfbSChristoph Hellwig dasd_eckd_steal_lock(struct dasd_device *device) 14411da177e4SLinus Torvalds { 14421da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 14431da177e4SLinus Torvalds int rc; 14441da177e4SLinus Torvalds 14451da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 14461da177e4SLinus Torvalds return -EACCES; 14471da177e4SLinus Torvalds 14481da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 14491da177e4SLinus Torvalds 1, 32, device); 14501da177e4SLinus Torvalds if (IS_ERR(cqr)) { 14511da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 14521da177e4SLinus Torvalds "Could not allocate initialization request"); 14531da177e4SLinus Torvalds return PTR_ERR(cqr); 14541da177e4SLinus Torvalds } 14551da177e4SLinus Torvalds cqr->cpaddr->cmd_code = DASD_ECKD_CCW_SLCK; 14561da177e4SLinus Torvalds cqr->cpaddr->flags |= CCW_FLAG_SLI; 14571da177e4SLinus Torvalds cqr->cpaddr->count = 32; 14581da177e4SLinus Torvalds cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; 14591da177e4SLinus Torvalds cqr->device = device; 14601da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 14611c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 14621da177e4SLinus Torvalds cqr->retries = 0; 14631da177e4SLinus Torvalds cqr->expires = 2 * HZ; 14641da177e4SLinus Torvalds cqr->buildclk = get_clock(); 14651da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 14661da177e4SLinus Torvalds 14671da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 14681da177e4SLinus Torvalds 14691da177e4SLinus Torvalds dasd_sfree_request(cqr, cqr->device); 14701da177e4SLinus Torvalds return rc; 14711da177e4SLinus Torvalds } 14721da177e4SLinus Torvalds 14731da177e4SLinus Torvalds /* 14741da177e4SLinus Torvalds * Read performance statistics 14751da177e4SLinus Torvalds */ 14761da177e4SLinus Torvalds static int 14771107ccfbSChristoph Hellwig dasd_eckd_performance(struct dasd_device *device, void __user *argp) 14781da177e4SLinus Torvalds { 14791da177e4SLinus Torvalds struct dasd_psf_prssd_data *prssdp; 14801da177e4SLinus Torvalds struct dasd_rssd_perf_stats_t *stats; 14811da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 14821da177e4SLinus Torvalds struct ccw1 *ccw; 14831da177e4SLinus Torvalds int rc; 14841da177e4SLinus Torvalds 14851da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 14861da177e4SLinus Torvalds 1 /* PSF */ + 1 /* RSSD */ , 14871da177e4SLinus Torvalds (sizeof (struct dasd_psf_prssd_data) + 14881da177e4SLinus Torvalds sizeof (struct dasd_rssd_perf_stats_t)), 14891da177e4SLinus Torvalds device); 14901da177e4SLinus Torvalds if (IS_ERR(cqr)) { 14911da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 14921da177e4SLinus Torvalds "Could not allocate initialization request"); 14931da177e4SLinus Torvalds return PTR_ERR(cqr); 14941da177e4SLinus Torvalds } 14951da177e4SLinus Torvalds cqr->device = device; 14961da177e4SLinus Torvalds cqr->retries = 0; 14971da177e4SLinus Torvalds cqr->expires = 10 * HZ; 14981da177e4SLinus Torvalds 14991da177e4SLinus Torvalds /* Prepare for Read Subsystem Data */ 15001da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 15011da177e4SLinus Torvalds memset(prssdp, 0, sizeof (struct dasd_psf_prssd_data)); 15021da177e4SLinus Torvalds prssdp->order = PSF_ORDER_PRSSD; 15031da177e4SLinus Torvalds prssdp->suborder = 0x01; /* Perfomance Statistics */ 15041da177e4SLinus Torvalds prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 15051da177e4SLinus Torvalds 15061da177e4SLinus Torvalds ccw = cqr->cpaddr; 15071da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_PSF; 15081da177e4SLinus Torvalds ccw->count = sizeof (struct dasd_psf_prssd_data); 15091da177e4SLinus Torvalds ccw->flags |= CCW_FLAG_CC; 15101da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) prssdp; 15111da177e4SLinus Torvalds 15121da177e4SLinus Torvalds /* Read Subsystem Data - Performance Statistics */ 15131da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 15141da177e4SLinus Torvalds memset(stats, 0, sizeof (struct dasd_rssd_perf_stats_t)); 15151da177e4SLinus Torvalds 15161da177e4SLinus Torvalds ccw++; 15171da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_RSSD; 15181da177e4SLinus Torvalds ccw->count = sizeof (struct dasd_rssd_perf_stats_t); 15191da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) stats; 15201da177e4SLinus Torvalds 15211da177e4SLinus Torvalds cqr->buildclk = get_clock(); 15221da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 15231da177e4SLinus Torvalds rc = dasd_sleep_on(cqr); 15241da177e4SLinus Torvalds if (rc == 0) { 15251da177e4SLinus Torvalds /* Prepare for Read Subsystem Data */ 15261da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 15271da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 15281107ccfbSChristoph Hellwig if (copy_to_user(argp, stats, 15291107ccfbSChristoph Hellwig sizeof(struct dasd_rssd_perf_stats_t))) 15301107ccfbSChristoph Hellwig rc = -EFAULT; 15311da177e4SLinus Torvalds } 15321da177e4SLinus Torvalds dasd_sfree_request(cqr, cqr->device); 15331da177e4SLinus Torvalds return rc; 15341da177e4SLinus Torvalds } 15351da177e4SLinus Torvalds 15361da177e4SLinus Torvalds /* 15371da177e4SLinus Torvalds * Get attributes (cache operations) 15381da177e4SLinus Torvalds * Returnes the cache attributes used in Define Extend (DE). 15391da177e4SLinus Torvalds */ 15401da177e4SLinus Torvalds static int 15411107ccfbSChristoph Hellwig dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 15421da177e4SLinus Torvalds { 15431107ccfbSChristoph Hellwig struct dasd_eckd_private *private = 15441107ccfbSChristoph Hellwig (struct dasd_eckd_private *)device->private; 15451107ccfbSChristoph Hellwig struct attrib_data_t attrib = private->attrib; 15461da177e4SLinus Torvalds int rc; 15471da177e4SLinus Torvalds 15481da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 15491da177e4SLinus Torvalds return -EACCES; 15501107ccfbSChristoph Hellwig if (!argp) 15511da177e4SLinus Torvalds return -EINVAL; 15521da177e4SLinus Torvalds 15531107ccfbSChristoph Hellwig rc = 0; 15541107ccfbSChristoph Hellwig if (copy_to_user(argp, (long *) &attrib, 15551107ccfbSChristoph Hellwig sizeof (struct attrib_data_t))) 15561107ccfbSChristoph Hellwig rc = -EFAULT; 15571da177e4SLinus Torvalds 15581da177e4SLinus Torvalds return rc; 15591da177e4SLinus Torvalds } 15601da177e4SLinus Torvalds 15611da177e4SLinus Torvalds /* 15621da177e4SLinus Torvalds * Set attributes (cache operations) 15631da177e4SLinus Torvalds * Stores the attributes for cache operation to be used in Define Extend (DE). 15641da177e4SLinus Torvalds */ 15651da177e4SLinus Torvalds static int 15661107ccfbSChristoph Hellwig dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 15671da177e4SLinus Torvalds { 15681107ccfbSChristoph Hellwig struct dasd_eckd_private *private = 15691107ccfbSChristoph Hellwig (struct dasd_eckd_private *)device->private; 15701da177e4SLinus Torvalds struct attrib_data_t attrib; 15711da177e4SLinus Torvalds 15721da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 15731da177e4SLinus Torvalds return -EACCES; 15741107ccfbSChristoph Hellwig if (!argp) 15751da177e4SLinus Torvalds return -EINVAL; 15761da177e4SLinus Torvalds 15771107ccfbSChristoph Hellwig if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 15781da177e4SLinus Torvalds return -EFAULT; 15791da177e4SLinus Torvalds private->attrib = attrib; 15801da177e4SLinus Torvalds 15811da177e4SLinus Torvalds DEV_MESSAGE(KERN_INFO, device, 15821da177e4SLinus Torvalds "cache operation mode set to %x (%i cylinder prestage)", 15831da177e4SLinus Torvalds private->attrib.operation, private->attrib.nr_cyl); 15841da177e4SLinus Torvalds return 0; 15851da177e4SLinus Torvalds } 15861da177e4SLinus Torvalds 15871107ccfbSChristoph Hellwig static int 15881107ccfbSChristoph Hellwig dasd_eckd_ioctl(struct dasd_device *device, unsigned int cmd, void __user *argp) 15891107ccfbSChristoph Hellwig { 15901107ccfbSChristoph Hellwig switch (cmd) { 15911107ccfbSChristoph Hellwig case BIODASDGATTR: 15921107ccfbSChristoph Hellwig return dasd_eckd_get_attrib(device, argp); 15931107ccfbSChristoph Hellwig case BIODASDSATTR: 15941107ccfbSChristoph Hellwig return dasd_eckd_set_attrib(device, argp); 15951107ccfbSChristoph Hellwig case BIODASDPSRD: 15961107ccfbSChristoph Hellwig return dasd_eckd_performance(device, argp); 15971107ccfbSChristoph Hellwig case BIODASDRLSE: 15981107ccfbSChristoph Hellwig return dasd_eckd_release(device); 15991107ccfbSChristoph Hellwig case BIODASDRSRV: 16001107ccfbSChristoph Hellwig return dasd_eckd_reserve(device); 16011107ccfbSChristoph Hellwig case BIODASDSLCK: 16021107ccfbSChristoph Hellwig return dasd_eckd_steal_lock(device); 16031107ccfbSChristoph Hellwig default: 16041107ccfbSChristoph Hellwig return -ENOIOCTLCMD; 16051107ccfbSChristoph Hellwig } 16061107ccfbSChristoph Hellwig } 16071107ccfbSChristoph Hellwig 16081da177e4SLinus Torvalds /* 1609445b5b49SHorst Hummel * Dump the range of CCWs into 'page' buffer 1610445b5b49SHorst Hummel * and return number of printed chars. 1611445b5b49SHorst Hummel */ 1612445b5b49SHorst Hummel static inline int 1613445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 1614445b5b49SHorst Hummel { 1615445b5b49SHorst Hummel int len, count; 1616445b5b49SHorst Hummel char *datap; 1617445b5b49SHorst Hummel 1618445b5b49SHorst Hummel len = 0; 1619445b5b49SHorst Hummel while (from <= to) { 1620445b5b49SHorst Hummel len += sprintf(page + len, KERN_ERR PRINTK_HEADER 1621445b5b49SHorst Hummel " CCW %p: %08X %08X DAT:", 1622445b5b49SHorst Hummel from, ((int *) from)[0], ((int *) from)[1]); 1623445b5b49SHorst Hummel 1624445b5b49SHorst Hummel /* get pointer to data (consider IDALs) */ 1625445b5b49SHorst Hummel if (from->flags & CCW_FLAG_IDA) 1626445b5b49SHorst Hummel datap = (char *) *((addr_t *) (addr_t) from->cda); 1627445b5b49SHorst Hummel else 1628445b5b49SHorst Hummel datap = (char *) ((addr_t) from->cda); 1629445b5b49SHorst Hummel 1630445b5b49SHorst Hummel /* dump data (max 32 bytes) */ 1631445b5b49SHorst Hummel for (count = 0; count < from->count && count < 32; count++) { 1632445b5b49SHorst Hummel if (count % 8 == 0) len += sprintf(page + len, " "); 1633445b5b49SHorst Hummel if (count % 4 == 0) len += sprintf(page + len, " "); 1634445b5b49SHorst Hummel len += sprintf(page + len, "%02x", datap[count]); 1635445b5b49SHorst Hummel } 1636445b5b49SHorst Hummel len += sprintf(page + len, "\n"); 1637445b5b49SHorst Hummel from++; 1638445b5b49SHorst Hummel } 1639445b5b49SHorst Hummel return len; 1640445b5b49SHorst Hummel } 1641445b5b49SHorst Hummel 1642445b5b49SHorst Hummel /* 16431da177e4SLinus Torvalds * Print sense data and related channel program. 16441da177e4SLinus Torvalds * Parts are printed because printk buffer is only 1024 bytes. 16451da177e4SLinus Torvalds */ 16461da177e4SLinus Torvalds static void 16471da177e4SLinus Torvalds dasd_eckd_dump_sense(struct dasd_device *device, struct dasd_ccw_req * req, 16481da177e4SLinus Torvalds struct irb *irb) 16491da177e4SLinus Torvalds { 16501da177e4SLinus Torvalds char *page; 1651445b5b49SHorst Hummel struct ccw1 *first, *last, *fail, *from, *to; 1652445b5b49SHorst Hummel int len, sl, sct; 16531da177e4SLinus Torvalds 16541da177e4SLinus Torvalds page = (char *) get_zeroed_page(GFP_ATOMIC); 16551da177e4SLinus Torvalds if (page == NULL) { 16561da177e4SLinus Torvalds DEV_MESSAGE(KERN_ERR, device, " %s", 16571da177e4SLinus Torvalds "No memory to dump sense data"); 16581da177e4SLinus Torvalds return; 16591da177e4SLinus Torvalds } 1660445b5b49SHorst Hummel /* dump the sense data */ 16611da177e4SLinus Torvalds len = sprintf(page, KERN_ERR PRINTK_HEADER 16621da177e4SLinus Torvalds " I/O status report for device %s:\n", 16631da177e4SLinus Torvalds device->cdev->dev.bus_id); 16641da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 16651da177e4SLinus Torvalds " in req: %p CS: 0x%02X DS: 0x%02X\n", req, 16661da177e4SLinus Torvalds irb->scsw.cstat, irb->scsw.dstat); 16671da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 16681da177e4SLinus Torvalds " device %s: Failing CCW: %p\n", 16691da177e4SLinus Torvalds device->cdev->dev.bus_id, 16701da177e4SLinus Torvalds (void *) (addr_t) irb->scsw.cpa); 16711da177e4SLinus Torvalds if (irb->esw.esw0.erw.cons) { 16721da177e4SLinus Torvalds for (sl = 0; sl < 4; sl++) { 16731da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 16741da177e4SLinus Torvalds " Sense(hex) %2d-%2d:", 16751da177e4SLinus Torvalds (8 * sl), ((8 * sl) + 7)); 16761da177e4SLinus Torvalds 16771da177e4SLinus Torvalds for (sct = 0; sct < 8; sct++) { 16781da177e4SLinus Torvalds len += sprintf(page + len, " %02x", 16791da177e4SLinus Torvalds irb->ecw[8 * sl + sct]); 16801da177e4SLinus Torvalds } 16811da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 16821da177e4SLinus Torvalds } 16831da177e4SLinus Torvalds 16841da177e4SLinus Torvalds if (irb->ecw[27] & DASD_SENSE_BIT_0) { 16851da177e4SLinus Torvalds /* 24 Byte Sense Data */ 1686445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 16871da177e4SLinus Torvalds " 24 Byte: %x MSG %x, " 16881da177e4SLinus Torvalds "%s MSGb to SYSOP\n", 16891da177e4SLinus Torvalds irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 16901da177e4SLinus Torvalds irb->ecw[1] & 0x10 ? "" : "no"); 16911da177e4SLinus Torvalds } else { 16921da177e4SLinus Torvalds /* 32 Byte Sense Data */ 1693445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 16941da177e4SLinus Torvalds " 32 Byte: Format: %x " 16951da177e4SLinus Torvalds "Exception class %x\n", 16961da177e4SLinus Torvalds irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 16971da177e4SLinus Torvalds } 16981da177e4SLinus Torvalds } else { 1699445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 17001da177e4SLinus Torvalds " SORRY - NO VALID SENSE AVAILABLE\n"); 17011da177e4SLinus Torvalds } 1702445b5b49SHorst Hummel printk("%s", page); 17031da177e4SLinus Torvalds 1704445b5b49SHorst Hummel /* dump the Channel Program (max 140 Bytes per line) */ 1705445b5b49SHorst Hummel /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 1706445b5b49SHorst Hummel first = req->cpaddr; 1707445b5b49SHorst Hummel for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 1708445b5b49SHorst Hummel to = min(first + 6, last); 17091da177e4SLinus Torvalds len = sprintf(page, KERN_ERR PRINTK_HEADER 17101da177e4SLinus Torvalds " Related CP in req: %p\n", req); 1711445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(first, to, page + len); 1712445b5b49SHorst Hummel printk("%s", page); 17131da177e4SLinus Torvalds 1714445b5b49SHorst Hummel /* print failing CCW area (maximum 4) */ 1715445b5b49SHorst Hummel /* scsw->cda is either valid or zero */ 17161da177e4SLinus Torvalds len = 0; 1717445b5b49SHorst Hummel from = ++to; 1718445b5b49SHorst Hummel fail = (struct ccw1 *)(addr_t) irb->scsw.cpa; /* failing CCW */ 1719445b5b49SHorst Hummel if (from < fail - 2) { 1720445b5b49SHorst Hummel from = fail - 2; /* there is a gap - print header */ 1721445b5b49SHorst Hummel len += sprintf(page, KERN_ERR PRINTK_HEADER "......\n"); 17221da177e4SLinus Torvalds } 1723445b5b49SHorst Hummel to = min(fail + 1, last); 1724445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, to, page + len); 17251da177e4SLinus Torvalds 1726445b5b49SHorst Hummel /* print last CCWs (maximum 2) */ 1727445b5b49SHorst Hummel from = max(from, ++to); 1728445b5b49SHorst Hummel if (from < last - 1) { 1729445b5b49SHorst Hummel from = last - 1; /* there is a gap - print header */ 17301da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n"); 17311da177e4SLinus Torvalds } 1732445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, last, page + len); 17331da177e4SLinus Torvalds if (len > 0) 1734445b5b49SHorst Hummel printk("%s", page); 17351da177e4SLinus Torvalds free_page((unsigned long) page); 17361da177e4SLinus Torvalds } 17371da177e4SLinus Torvalds 17381da177e4SLinus Torvalds /* 17391da177e4SLinus Torvalds * max_blocks is dependent on the amount of storage that is available 17401da177e4SLinus Torvalds * in the static io buffer for each device. Currently each device has 17411da177e4SLinus Torvalds * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has 17421da177e4SLinus Torvalds * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use 17431da177e4SLinus Torvalds * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In 17441da177e4SLinus Torvalds * addition we have one define extent ccw + 16 bytes of data and one 17451da177e4SLinus Torvalds * locate record ccw + 16 bytes of data. That makes: 17461da177e4SLinus Torvalds * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. 17471da177e4SLinus Torvalds * We want to fit two into the available memory so that we can immediately 17481da177e4SLinus Torvalds * start the next request if one finishes off. That makes 249.5 blocks 17491da177e4SLinus Torvalds * for one request. Give a little safety and the result is 240. 17501da177e4SLinus Torvalds */ 17511da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline = { 17521da177e4SLinus Torvalds .owner = THIS_MODULE, 17531da177e4SLinus Torvalds .name = "ECKD", 17541da177e4SLinus Torvalds .ebcname = "ECKD", 17551da177e4SLinus Torvalds .max_blocks = 240, 17561da177e4SLinus Torvalds .check_device = dasd_eckd_check_characteristics, 17571da177e4SLinus Torvalds .do_analysis = dasd_eckd_do_analysis, 17581da177e4SLinus Torvalds .fill_geometry = dasd_eckd_fill_geometry, 17591da177e4SLinus Torvalds .start_IO = dasd_start_IO, 17601da177e4SLinus Torvalds .term_IO = dasd_term_IO, 17611da177e4SLinus Torvalds .format_device = dasd_eckd_format_device, 17621da177e4SLinus Torvalds .examine_error = dasd_eckd_examine_error, 17631da177e4SLinus Torvalds .erp_action = dasd_eckd_erp_action, 17641da177e4SLinus Torvalds .erp_postaction = dasd_eckd_erp_postaction, 17651da177e4SLinus Torvalds .build_cp = dasd_eckd_build_cp, 17661da177e4SLinus Torvalds .free_cp = dasd_eckd_free_cp, 17671da177e4SLinus Torvalds .dump_sense = dasd_eckd_dump_sense, 17681da177e4SLinus Torvalds .fill_info = dasd_eckd_fill_info, 17691107ccfbSChristoph Hellwig .ioctl = dasd_eckd_ioctl, 17701da177e4SLinus Torvalds }; 17711da177e4SLinus Torvalds 17721da177e4SLinus Torvalds static int __init 17731da177e4SLinus Torvalds dasd_eckd_init(void) 17741da177e4SLinus Torvalds { 17751da177e4SLinus Torvalds ASCEBC(dasd_eckd_discipline.ebcname, 4); 177640545573SHorst Hummel return ccw_driver_register(&dasd_eckd_driver); 17771da177e4SLinus Torvalds } 17781da177e4SLinus Torvalds 17791da177e4SLinus Torvalds static void __exit 17801da177e4SLinus Torvalds dasd_eckd_cleanup(void) 17811da177e4SLinus Torvalds { 17821da177e4SLinus Torvalds ccw_driver_unregister(&dasd_eckd_driver); 17831da177e4SLinus Torvalds } 17841da177e4SLinus Torvalds 17851da177e4SLinus Torvalds module_init(dasd_eckd_init); 17861da177e4SLinus Torvalds module_exit(dasd_eckd_cleanup); 1787