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/config.h> 131da177e4SLinus Torvalds #include <linux/stddef.h> 141da177e4SLinus Torvalds #include <linux/kernel.h> 151da177e4SLinus Torvalds #include <linux/slab.h> 161da177e4SLinus Torvalds #include <linux/hdreg.h> /* HDIO_GETGEO */ 171da177e4SLinus Torvalds #include <linux/bio.h> 181da177e4SLinus Torvalds #include <linux/module.h> 191da177e4SLinus Torvalds #include <linux/init.h> 201da177e4SLinus Torvalds 211da177e4SLinus Torvalds #include <asm/debug.h> 221da177e4SLinus Torvalds #include <asm/idals.h> 231da177e4SLinus Torvalds #include <asm/ebcdic.h> 241da177e4SLinus Torvalds #include <asm/io.h> 251da177e4SLinus Torvalds #include <asm/todclk.h> 261da177e4SLinus Torvalds #include <asm/uaccess.h> 2740545573SHorst Hummel #include <asm/cio.h> 281da177e4SLinus Torvalds #include <asm/ccwdev.h> 291da177e4SLinus Torvalds 301da177e4SLinus Torvalds #include "dasd_int.h" 311da177e4SLinus Torvalds #include "dasd_eckd.h" 321da177e4SLinus Torvalds 331da177e4SLinus Torvalds #ifdef PRINTK_HEADER 341da177e4SLinus Torvalds #undef PRINTK_HEADER 351da177e4SLinus Torvalds #endif /* PRINTK_HEADER */ 361da177e4SLinus Torvalds #define PRINTK_HEADER "dasd(eckd):" 371da177e4SLinus Torvalds 381da177e4SLinus Torvalds #define ECKD_C0(i) (i->home_bytes) 391da177e4SLinus Torvalds #define ECKD_F(i) (i->formula) 401da177e4SLinus Torvalds #define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\ 411da177e4SLinus Torvalds (i->factors.f_0x02.f1)) 421da177e4SLinus Torvalds #define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\ 431da177e4SLinus Torvalds (i->factors.f_0x02.f2)) 441da177e4SLinus Torvalds #define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\ 451da177e4SLinus Torvalds (i->factors.f_0x02.f3)) 461da177e4SLinus Torvalds #define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0) 471da177e4SLinus Torvalds #define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0) 481da177e4SLinus Torvalds #define ECKD_F6(i) (i->factor6) 491da177e4SLinus Torvalds #define ECKD_F7(i) (i->factor7) 501da177e4SLinus Torvalds #define ECKD_F8(i) (i->factor8) 511da177e4SLinus Torvalds 521da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 531da177e4SLinus Torvalds 541da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline; 551da177e4SLinus Torvalds 561da177e4SLinus Torvalds struct dasd_eckd_private { 571da177e4SLinus Torvalds struct dasd_eckd_characteristics rdc_data; 581da177e4SLinus Torvalds struct dasd_eckd_confdata conf_data; 591da177e4SLinus Torvalds struct dasd_eckd_path path_data; 601da177e4SLinus Torvalds struct eckd_count count_area[5]; 611da177e4SLinus Torvalds int init_cqr_status; 621da177e4SLinus Torvalds int uses_cdl; 631da177e4SLinus Torvalds struct attrib_data_t attrib; /* e.g. cache operations */ 641da177e4SLinus Torvalds }; 651da177e4SLinus Torvalds 661da177e4SLinus Torvalds /* The ccw bus type uses this table to find devices that it sends to 671da177e4SLinus Torvalds * dasd_eckd_probe */ 681da177e4SLinus Torvalds static struct ccw_device_id dasd_eckd_ids[] = { 691da177e4SLinus Torvalds { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), driver_info: 0x1}, 701da177e4SLinus Torvalds { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), driver_info: 0x2}, 711da177e4SLinus Torvalds { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3390, 0), driver_info: 0x3}, 721da177e4SLinus Torvalds { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), driver_info: 0x4}, 731da177e4SLinus Torvalds { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), driver_info: 0x5}, 741da177e4SLinus Torvalds { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), driver_info: 0x6}, 751da177e4SLinus Torvalds { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), driver_info: 0x7}, 761da177e4SLinus Torvalds { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), driver_info: 0x8}, 771da177e4SLinus Torvalds { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), driver_info: 0x9}, 781da177e4SLinus Torvalds { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), driver_info: 0xa}, 791da177e4SLinus Torvalds { /* end of list */ }, 801da177e4SLinus Torvalds }; 811da177e4SLinus Torvalds 821da177e4SLinus Torvalds MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids); 831da177e4SLinus Torvalds 841da177e4SLinus Torvalds static struct ccw_driver dasd_eckd_driver; /* see below */ 851da177e4SLinus Torvalds 861da177e4SLinus Torvalds /* initial attempt at a probe function. this can be simplified once 871da177e4SLinus Torvalds * the other detection code is gone */ 881da177e4SLinus Torvalds static int 891da177e4SLinus Torvalds dasd_eckd_probe (struct ccw_device *cdev) 901da177e4SLinus Torvalds { 911da177e4SLinus Torvalds int ret; 921da177e4SLinus Torvalds 9340545573SHorst Hummel /* set ECKD specific ccw-device options */ 9440545573SHorst Hummel ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE); 9540545573SHorst Hummel if (ret) { 9640545573SHorst Hummel printk(KERN_WARNING 9740545573SHorst Hummel "dasd_eckd_probe: could not set ccw-device options " 9840545573SHorst Hummel "for %s\n", cdev->dev.bus_id); 991da177e4SLinus Torvalds return ret; 10040545573SHorst Hummel } 10140545573SHorst Hummel ret = dasd_generic_probe(cdev, &dasd_eckd_discipline); 10240545573SHorst Hummel return ret; 1031da177e4SLinus Torvalds } 1041da177e4SLinus Torvalds 1051da177e4SLinus Torvalds static int 1061da177e4SLinus Torvalds dasd_eckd_set_online(struct ccw_device *cdev) 1071da177e4SLinus Torvalds { 1081da177e4SLinus Torvalds return dasd_generic_set_online(cdev, &dasd_eckd_discipline); 1091da177e4SLinus Torvalds } 1101da177e4SLinus Torvalds 1111da177e4SLinus Torvalds static struct ccw_driver dasd_eckd_driver = { 1121da177e4SLinus Torvalds .name = "dasd-eckd", 1131da177e4SLinus Torvalds .owner = THIS_MODULE, 1141da177e4SLinus Torvalds .ids = dasd_eckd_ids, 1151da177e4SLinus Torvalds .probe = dasd_eckd_probe, 1161da177e4SLinus Torvalds .remove = dasd_generic_remove, 1171da177e4SLinus Torvalds .set_offline = dasd_generic_set_offline, 1181da177e4SLinus Torvalds .set_online = dasd_eckd_set_online, 1191da177e4SLinus Torvalds .notify = dasd_generic_notify, 1201da177e4SLinus Torvalds }; 1211da177e4SLinus Torvalds 1221da177e4SLinus Torvalds static const int sizes_trk0[] = { 28, 148, 84 }; 1231da177e4SLinus Torvalds #define LABEL_SIZE 140 1241da177e4SLinus Torvalds 1251da177e4SLinus Torvalds static inline unsigned int 1261da177e4SLinus Torvalds round_up_multiple(unsigned int no, unsigned int mult) 1271da177e4SLinus Torvalds { 1281da177e4SLinus Torvalds int rem = no % mult; 1291da177e4SLinus Torvalds return (rem ? no - rem + mult : no); 1301da177e4SLinus Torvalds } 1311da177e4SLinus Torvalds 1321da177e4SLinus Torvalds static inline unsigned int 1331da177e4SLinus Torvalds ceil_quot(unsigned int d1, unsigned int d2) 1341da177e4SLinus Torvalds { 1351da177e4SLinus Torvalds return (d1 + (d2 - 1)) / d2; 1361da177e4SLinus Torvalds } 1371da177e4SLinus Torvalds 1381da177e4SLinus Torvalds static inline int 1391da177e4SLinus Torvalds bytes_per_record(struct dasd_eckd_characteristics *rdc, int kl, int dl) 1401da177e4SLinus Torvalds { 1411da177e4SLinus Torvalds unsigned int fl1, fl2, int1, int2; 1421da177e4SLinus Torvalds int bpr; 1431da177e4SLinus Torvalds 1441da177e4SLinus Torvalds switch (rdc->formula) { 1451da177e4SLinus Torvalds case 0x01: 1461da177e4SLinus Torvalds fl1 = round_up_multiple(ECKD_F2(rdc) + dl, ECKD_F1(rdc)); 1471da177e4SLinus Torvalds fl2 = round_up_multiple(kl ? ECKD_F2(rdc) + kl : 0, 1481da177e4SLinus Torvalds ECKD_F1(rdc)); 1491da177e4SLinus Torvalds bpr = fl1 + fl2; 1501da177e4SLinus Torvalds break; 1511da177e4SLinus Torvalds case 0x02: 1521da177e4SLinus Torvalds int1 = ceil_quot(dl + ECKD_F6(rdc), ECKD_F5(rdc) << 1); 1531da177e4SLinus Torvalds int2 = ceil_quot(kl + ECKD_F6(rdc), ECKD_F5(rdc) << 1); 1541da177e4SLinus Torvalds fl1 = round_up_multiple(ECKD_F1(rdc) * ECKD_F2(rdc) + dl + 1551da177e4SLinus Torvalds ECKD_F6(rdc) + ECKD_F4(rdc) * int1, 1561da177e4SLinus Torvalds ECKD_F1(rdc)); 1571da177e4SLinus Torvalds fl2 = round_up_multiple(ECKD_F1(rdc) * ECKD_F3(rdc) + kl + 1581da177e4SLinus Torvalds ECKD_F6(rdc) + ECKD_F4(rdc) * int2, 1591da177e4SLinus Torvalds ECKD_F1(rdc)); 1601da177e4SLinus Torvalds bpr = fl1 + fl2; 1611da177e4SLinus Torvalds break; 1621da177e4SLinus Torvalds default: 1631da177e4SLinus Torvalds bpr = 0; 1641da177e4SLinus Torvalds break; 1651da177e4SLinus Torvalds } 1661da177e4SLinus Torvalds return bpr; 1671da177e4SLinus Torvalds } 1681da177e4SLinus Torvalds 1691da177e4SLinus Torvalds static inline unsigned int 1701da177e4SLinus Torvalds bytes_per_track(struct dasd_eckd_characteristics *rdc) 1711da177e4SLinus Torvalds { 1721da177e4SLinus Torvalds return *(unsigned int *) (rdc->byte_per_track) >> 8; 1731da177e4SLinus Torvalds } 1741da177e4SLinus Torvalds 1751da177e4SLinus Torvalds static inline unsigned int 1761da177e4SLinus Torvalds recs_per_track(struct dasd_eckd_characteristics * rdc, 1771da177e4SLinus Torvalds unsigned int kl, unsigned int dl) 1781da177e4SLinus Torvalds { 1791da177e4SLinus Torvalds int dn, kn; 1801da177e4SLinus Torvalds 1811da177e4SLinus Torvalds switch (rdc->dev_type) { 1821da177e4SLinus Torvalds case 0x3380: 1831da177e4SLinus Torvalds if (kl) 1841da177e4SLinus Torvalds return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + 1851da177e4SLinus Torvalds ceil_quot(dl + 12, 32)); 1861da177e4SLinus Torvalds else 1871da177e4SLinus Torvalds return 1499 / (15 + ceil_quot(dl + 12, 32)); 1881da177e4SLinus Torvalds case 0x3390: 1891da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1901da177e4SLinus Torvalds if (kl) { 1911da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1921da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + 1931da177e4SLinus Torvalds 9 + ceil_quot(dl + 6 * dn, 34)); 1941da177e4SLinus Torvalds } else 1951da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); 1961da177e4SLinus Torvalds case 0x9345: 1971da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1981da177e4SLinus Torvalds if (kl) { 1991da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 2001da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + 2011da177e4SLinus Torvalds ceil_quot(dl + 6 * dn, 34)); 2021da177e4SLinus Torvalds } else 2031da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); 2041da177e4SLinus Torvalds } 2051da177e4SLinus Torvalds return 0; 2061da177e4SLinus Torvalds } 2071da177e4SLinus Torvalds 2081da177e4SLinus Torvalds static inline void 2091da177e4SLinus Torvalds check_XRC (struct ccw1 *de_ccw, 2101da177e4SLinus Torvalds struct DE_eckd_data *data, 2111da177e4SLinus Torvalds struct dasd_device *device) 2121da177e4SLinus Torvalds { 2131da177e4SLinus Torvalds struct dasd_eckd_private *private; 2141da177e4SLinus Torvalds 2151da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 2161da177e4SLinus Torvalds 2171da177e4SLinus Torvalds /* switch on System Time Stamp - needed for XRC Support */ 2181da177e4SLinus Torvalds if (private->rdc_data.facilities.XRC_supported) { 2191da177e4SLinus Torvalds 2201da177e4SLinus Torvalds data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ 2211da177e4SLinus Torvalds data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ 2221da177e4SLinus Torvalds 2231da177e4SLinus Torvalds data->ep_sys_time = get_clock (); 2241da177e4SLinus Torvalds 2251da177e4SLinus Torvalds de_ccw->count = sizeof (struct DE_eckd_data); 2261da177e4SLinus Torvalds de_ccw->flags |= CCW_FLAG_SLI; 2271da177e4SLinus Torvalds } 2281da177e4SLinus Torvalds 2291da177e4SLinus Torvalds return; 2301da177e4SLinus Torvalds 2311da177e4SLinus Torvalds } /* end check_XRC */ 2321da177e4SLinus Torvalds 2331da177e4SLinus Torvalds static inline void 2341da177e4SLinus Torvalds define_extent(struct ccw1 * ccw, struct DE_eckd_data * data, int trk, 2351da177e4SLinus Torvalds int totrk, int cmd, struct dasd_device * device) 2361da177e4SLinus Torvalds { 2371da177e4SLinus Torvalds struct dasd_eckd_private *private; 2381da177e4SLinus Torvalds struct ch_t geo, beg, end; 2391da177e4SLinus Torvalds 2401da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 2411da177e4SLinus Torvalds 2421da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; 2431da177e4SLinus Torvalds ccw->flags = 0; 2441da177e4SLinus Torvalds ccw->count = 16; 2451da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 2461da177e4SLinus Torvalds 2471da177e4SLinus Torvalds memset(data, 0, sizeof (struct DE_eckd_data)); 2481da177e4SLinus Torvalds switch (cmd) { 2491da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 2501da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 2511da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 2521da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 2531da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 2541da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 2551da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 2561da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 2571da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_COUNT: 2581da177e4SLinus Torvalds data->mask.perm = 0x1; 2591da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 2601da177e4SLinus Torvalds break; 2611da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 2621da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 2631da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 2641da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 2651da177e4SLinus Torvalds data->mask.perm = 0x02; 2661da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 2671da177e4SLinus Torvalds check_XRC (ccw, data, device); 2681da177e4SLinus Torvalds break; 2691da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 2701da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 2711da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 2721da177e4SLinus Torvalds check_XRC (ccw, data, device); 2731da177e4SLinus Torvalds break; 2741da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 2751da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 2761da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 2771da177e4SLinus Torvalds data->mask.perm = 0x3; 2781da177e4SLinus Torvalds data->mask.auth = 0x1; 2791da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 2801da177e4SLinus Torvalds check_XRC (ccw, data, device); 2811da177e4SLinus Torvalds break; 2821da177e4SLinus Torvalds default: 2831da177e4SLinus Torvalds DEV_MESSAGE(KERN_ERR, device, "unknown opcode 0x%x", cmd); 2841da177e4SLinus Torvalds break; 2851da177e4SLinus Torvalds } 2861da177e4SLinus Torvalds 2871da177e4SLinus Torvalds data->attributes.mode = 0x3; /* ECKD */ 2881da177e4SLinus Torvalds 2891da177e4SLinus Torvalds if ((private->rdc_data.cu_type == 0x2105 || 2901da177e4SLinus Torvalds private->rdc_data.cu_type == 0x2107 || 2911da177e4SLinus Torvalds private->rdc_data.cu_type == 0x1750) 2921da177e4SLinus Torvalds && !(private->uses_cdl && trk < 2)) 2931da177e4SLinus Torvalds data->ga_extended |= 0x40; /* Regular Data Format Mode */ 2941da177e4SLinus Torvalds 2951da177e4SLinus Torvalds geo.cyl = private->rdc_data.no_cyl; 2961da177e4SLinus Torvalds geo.head = private->rdc_data.trk_per_cyl; 2971da177e4SLinus Torvalds beg.cyl = trk / geo.head; 2981da177e4SLinus Torvalds beg.head = trk % geo.head; 2991da177e4SLinus Torvalds end.cyl = totrk / geo.head; 3001da177e4SLinus Torvalds end.head = totrk % geo.head; 3011da177e4SLinus Torvalds 3021da177e4SLinus Torvalds /* check for sequential prestage - enhance cylinder range */ 3031da177e4SLinus Torvalds if (data->attributes.operation == DASD_SEQ_PRESTAGE || 3041da177e4SLinus Torvalds data->attributes.operation == DASD_SEQ_ACCESS) { 3051da177e4SLinus Torvalds 3061da177e4SLinus Torvalds if (end.cyl + private->attrib.nr_cyl < geo.cyl) 3071da177e4SLinus Torvalds end.cyl += private->attrib.nr_cyl; 3081da177e4SLinus Torvalds else 3091da177e4SLinus Torvalds end.cyl = (geo.cyl - 1); 3101da177e4SLinus Torvalds } 3111da177e4SLinus Torvalds 3121da177e4SLinus Torvalds data->beg_ext.cyl = beg.cyl; 3131da177e4SLinus Torvalds data->beg_ext.head = beg.head; 3141da177e4SLinus Torvalds data->end_ext.cyl = end.cyl; 3151da177e4SLinus Torvalds data->end_ext.head = end.head; 3161da177e4SLinus Torvalds } 3171da177e4SLinus Torvalds 3181da177e4SLinus Torvalds static inline void 3191da177e4SLinus Torvalds locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, int trk, 3201da177e4SLinus Torvalds int rec_on_trk, int no_rec, int cmd, 3211da177e4SLinus Torvalds struct dasd_device * device, int reclen) 3221da177e4SLinus Torvalds { 3231da177e4SLinus Torvalds struct dasd_eckd_private *private; 3241da177e4SLinus Torvalds int sector; 3251da177e4SLinus Torvalds int dn, d; 3261da177e4SLinus Torvalds 3271da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 3281da177e4SLinus Torvalds 3291da177e4SLinus Torvalds DBF_DEV_EVENT(DBF_INFO, device, 3301da177e4SLinus Torvalds "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", 3311da177e4SLinus Torvalds trk, rec_on_trk, no_rec, cmd, reclen); 3321da177e4SLinus Torvalds 3331da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; 3341da177e4SLinus Torvalds ccw->flags = 0; 3351da177e4SLinus Torvalds ccw->count = 16; 3361da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 3371da177e4SLinus Torvalds 3381da177e4SLinus Torvalds memset(data, 0, sizeof (struct LO_eckd_data)); 3391da177e4SLinus Torvalds sector = 0; 3401da177e4SLinus Torvalds if (rec_on_trk) { 3411da177e4SLinus Torvalds switch (private->rdc_data.dev_type) { 3421da177e4SLinus Torvalds case 0x3390: 3431da177e4SLinus Torvalds dn = ceil_quot(reclen + 6, 232); 3441da177e4SLinus Torvalds d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 3451da177e4SLinus Torvalds sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 3461da177e4SLinus Torvalds break; 3471da177e4SLinus Torvalds case 0x3380: 3481da177e4SLinus Torvalds d = 7 + ceil_quot(reclen + 12, 32); 3491da177e4SLinus Torvalds sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 3501da177e4SLinus Torvalds break; 3511da177e4SLinus Torvalds } 3521da177e4SLinus Torvalds } 3531da177e4SLinus Torvalds data->sector = sector; 3541da177e4SLinus Torvalds data->count = no_rec; 3551da177e4SLinus Torvalds switch (cmd) { 3561da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 3571da177e4SLinus Torvalds data->operation.orientation = 0x3; 3581da177e4SLinus Torvalds data->operation.operation = 0x03; 3591da177e4SLinus Torvalds break; 3601da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 3611da177e4SLinus Torvalds data->operation.orientation = 0x3; 3621da177e4SLinus Torvalds data->operation.operation = 0x16; 3631da177e4SLinus Torvalds break; 3641da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 3651da177e4SLinus Torvalds data->operation.orientation = 0x1; 3661da177e4SLinus Torvalds data->operation.operation = 0x03; 3671da177e4SLinus Torvalds data->count++; 3681da177e4SLinus Torvalds break; 3691da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 3701da177e4SLinus Torvalds data->operation.orientation = 0x3; 3711da177e4SLinus Torvalds data->operation.operation = 0x16; 3721da177e4SLinus Torvalds data->count++; 3731da177e4SLinus Torvalds break; 3741da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 3751da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 3761da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 3771da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 3781da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 3791da177e4SLinus Torvalds data->length = reclen; 3801da177e4SLinus Torvalds data->operation.operation = 0x01; 3811da177e4SLinus Torvalds break; 3821da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 3831da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 3841da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 3851da177e4SLinus Torvalds data->length = reclen; 3861da177e4SLinus Torvalds data->operation.operation = 0x03; 3871da177e4SLinus Torvalds break; 3881da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 3891da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 3901da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 3911da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 3921da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 3931da177e4SLinus Torvalds data->length = reclen; 3941da177e4SLinus Torvalds data->operation.operation = 0x06; 3951da177e4SLinus Torvalds break; 3961da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 3971da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 3981da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 3991da177e4SLinus Torvalds data->length = reclen; 4001da177e4SLinus Torvalds data->operation.operation = 0x16; 4011da177e4SLinus Torvalds break; 4021da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_COUNT: 4031da177e4SLinus Torvalds data->operation.operation = 0x06; 4041da177e4SLinus Torvalds break; 4051da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 4061da177e4SLinus Torvalds data->length = reclen; 4071da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 4081da177e4SLinus Torvalds data->operation.operation = 0x0b; 4091da177e4SLinus Torvalds break; 4101da177e4SLinus Torvalds default: 4111da177e4SLinus Torvalds DEV_MESSAGE(KERN_ERR, device, "unknown opcode 0x%x", cmd); 4121da177e4SLinus Torvalds } 4131da177e4SLinus Torvalds data->seek_addr.cyl = data->search_arg.cyl = 4141da177e4SLinus Torvalds trk / private->rdc_data.trk_per_cyl; 4151da177e4SLinus Torvalds data->seek_addr.head = data->search_arg.head = 4161da177e4SLinus Torvalds trk % private->rdc_data.trk_per_cyl; 4171da177e4SLinus Torvalds data->search_arg.record = rec_on_trk; 4181da177e4SLinus Torvalds } 4191da177e4SLinus Torvalds 4201da177e4SLinus Torvalds /* 4211da177e4SLinus Torvalds * Returns 1 if the block is one of the special blocks that needs 4221da177e4SLinus Torvalds * to get read/written with the KD variant of the command. 4231da177e4SLinus Torvalds * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and 4241da177e4SLinus Torvalds * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. 4251da177e4SLinus Torvalds * Luckily the KD variants differ only by one bit (0x08) from the 4261da177e4SLinus Torvalds * normal variant. So don't wonder about code like: 4271da177e4SLinus Torvalds * if (dasd_eckd_cdl_special(blk_per_trk, recid)) 4281da177e4SLinus Torvalds * ccw->cmd_code |= 0x8; 4291da177e4SLinus Torvalds */ 4301da177e4SLinus Torvalds static inline int 4311da177e4SLinus Torvalds dasd_eckd_cdl_special(int blk_per_trk, int recid) 4321da177e4SLinus Torvalds { 4331da177e4SLinus Torvalds if (recid < 3) 4341da177e4SLinus Torvalds return 1; 4351da177e4SLinus Torvalds if (recid < blk_per_trk) 4361da177e4SLinus Torvalds return 0; 4371da177e4SLinus Torvalds if (recid < 2 * blk_per_trk) 4381da177e4SLinus Torvalds return 1; 4391da177e4SLinus Torvalds return 0; 4401da177e4SLinus Torvalds } 4411da177e4SLinus Torvalds 4421da177e4SLinus Torvalds /* 4431da177e4SLinus Torvalds * Returns the record size for the special blocks of the cdl format. 4441da177e4SLinus Torvalds * Only returns something useful if dasd_eckd_cdl_special is true 4451da177e4SLinus Torvalds * for the recid. 4461da177e4SLinus Torvalds */ 4471da177e4SLinus Torvalds static inline int 4481da177e4SLinus Torvalds dasd_eckd_cdl_reclen(int recid) 4491da177e4SLinus Torvalds { 4501da177e4SLinus Torvalds if (recid < 3) 4511da177e4SLinus Torvalds return sizes_trk0[recid]; 4521da177e4SLinus Torvalds return LABEL_SIZE; 4531da177e4SLinus Torvalds } 4541da177e4SLinus Torvalds 4553d052595SHorst Hummel /* 4563d052595SHorst Hummel * Generate device unique id that specifies the physical device. 4573d052595SHorst Hummel */ 4583d052595SHorst Hummel static int 4593d052595SHorst Hummel dasd_eckd_generate_uid(struct dasd_device *device, struct dasd_uid *uid) 4603d052595SHorst Hummel { 4613d052595SHorst Hummel struct dasd_eckd_private *private; 4623d052595SHorst Hummel struct dasd_eckd_confdata *confdata; 4633d052595SHorst Hummel 4643d052595SHorst Hummel private = (struct dasd_eckd_private *) device->private; 4653d052595SHorst Hummel if (!private) 4663d052595SHorst Hummel return -ENODEV; 4673d052595SHorst Hummel confdata = &private->conf_data; 4683d052595SHorst Hummel if (!confdata) 4693d052595SHorst Hummel return -ENODEV; 4703d052595SHorst Hummel 4713d052595SHorst Hummel memset(uid, 0, sizeof(struct dasd_uid)); 4723d052595SHorst Hummel strncpy(uid->vendor, confdata->ned1.HDA_manufacturer, 4733d052595SHorst Hummel sizeof(uid->vendor) - 1); 4743d052595SHorst Hummel EBCASC(uid->vendor, sizeof(uid->vendor) - 1); 4753d052595SHorst Hummel strncpy(uid->serial, confdata->ned1.HDA_location, 4763d052595SHorst Hummel sizeof(uid->serial) - 1); 4773d052595SHorst Hummel EBCASC(uid->serial, sizeof(uid->serial) - 1); 4783d052595SHorst Hummel uid->ssid = confdata->neq.subsystemID; 4793d052595SHorst Hummel if (confdata->ned2.sneq.flags == 0x40) { 4803d052595SHorst Hummel uid->alias = 1; 4813d052595SHorst Hummel uid->unit_addr = confdata->ned2.sneq.base_unit_addr; 4823d052595SHorst Hummel } else 4833d052595SHorst Hummel uid->unit_addr = confdata->ned1.unit_addr; 4843d052595SHorst Hummel 4853d052595SHorst Hummel return 0; 4863d052595SHorst Hummel } 4873d052595SHorst Hummel 4881da177e4SLinus Torvalds static int 4891da177e4SLinus Torvalds dasd_eckd_read_conf(struct dasd_device *device) 4901da177e4SLinus Torvalds { 4911da177e4SLinus Torvalds void *conf_data; 4921da177e4SLinus Torvalds int conf_len, conf_data_saved; 4931da177e4SLinus Torvalds int rc; 4941da177e4SLinus Torvalds __u8 lpm; 4951da177e4SLinus Torvalds struct dasd_eckd_private *private; 4961da177e4SLinus Torvalds struct dasd_eckd_path *path_data; 4971da177e4SLinus Torvalds 4981da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 4991da177e4SLinus Torvalds path_data = (struct dasd_eckd_path *) &private->path_data; 5001da177e4SLinus Torvalds path_data->opm = ccw_device_get_path_mask(device->cdev); 5011da177e4SLinus Torvalds lpm = 0x80; 5021da177e4SLinus Torvalds conf_data_saved = 0; 5031da177e4SLinus Torvalds 5041da177e4SLinus Torvalds /* get configuration data per operational path */ 5051da177e4SLinus Torvalds for (lpm = 0x80; lpm; lpm>>= 1) { 5061da177e4SLinus Torvalds if (lpm & path_data->opm){ 5071da177e4SLinus Torvalds rc = read_conf_data_lpm(device->cdev, &conf_data, 5081da177e4SLinus Torvalds &conf_len, lpm); 5091da177e4SLinus Torvalds if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ 5101da177e4SLinus Torvalds MESSAGE(KERN_WARNING, 5111da177e4SLinus Torvalds "Read configuration data returned " 5121da177e4SLinus Torvalds "error %d", rc); 5131da177e4SLinus Torvalds return rc; 5141da177e4SLinus Torvalds } 5151da177e4SLinus Torvalds if (conf_data == NULL) { 5161da177e4SLinus Torvalds MESSAGE(KERN_WARNING, "%s", "No configuration " 5171da177e4SLinus Torvalds "data retrieved"); 5181da177e4SLinus Torvalds continue; /* no errror */ 5191da177e4SLinus Torvalds } 5201da177e4SLinus Torvalds if (conf_len != sizeof (struct dasd_eckd_confdata)) { 5211da177e4SLinus Torvalds MESSAGE(KERN_WARNING, 5221da177e4SLinus Torvalds "sizes of configuration data mismatch" 5231da177e4SLinus Torvalds "%d (read) vs %ld (expected)", 5241da177e4SLinus Torvalds conf_len, 5251da177e4SLinus Torvalds sizeof (struct dasd_eckd_confdata)); 5261da177e4SLinus Torvalds kfree(conf_data); 5271da177e4SLinus Torvalds continue; /* no errror */ 5281da177e4SLinus Torvalds } 5291da177e4SLinus Torvalds /* save first valid configuration data */ 5301da177e4SLinus Torvalds if (!conf_data_saved){ 5311da177e4SLinus Torvalds memcpy(&private->conf_data, conf_data, 5321da177e4SLinus Torvalds sizeof (struct dasd_eckd_confdata)); 5331da177e4SLinus Torvalds conf_data_saved++; 5341da177e4SLinus Torvalds } 5351da177e4SLinus Torvalds switch (((char *)conf_data)[242] & 0x07){ 5361da177e4SLinus Torvalds case 0x02: 5371da177e4SLinus Torvalds path_data->npm |= lpm; 5381da177e4SLinus Torvalds break; 5391da177e4SLinus Torvalds case 0x03: 5401da177e4SLinus Torvalds path_data->ppm |= lpm; 5411da177e4SLinus Torvalds break; 5421da177e4SLinus Torvalds } 5431da177e4SLinus Torvalds kfree(conf_data); 5441da177e4SLinus Torvalds } 5451da177e4SLinus Torvalds } 5461da177e4SLinus Torvalds return 0; 5471da177e4SLinus Torvalds } 5481da177e4SLinus Torvalds 5493d052595SHorst Hummel /* 55040545573SHorst Hummel * Build CP for Perform Subsystem Function - SSC. 55140545573SHorst Hummel */ 55240545573SHorst Hummel struct dasd_ccw_req * 55340545573SHorst Hummel dasd_eckd_build_psf_ssc(struct dasd_device *device) 55440545573SHorst Hummel { 55540545573SHorst Hummel struct dasd_ccw_req *cqr; 55640545573SHorst Hummel struct dasd_psf_ssc_data *psf_ssc_data; 55740545573SHorst Hummel struct ccw1 *ccw; 55840545573SHorst Hummel 55940545573SHorst Hummel cqr = dasd_smalloc_request("ECKD", 1 /* PSF */ , 56040545573SHorst Hummel sizeof(struct dasd_psf_ssc_data), 56140545573SHorst Hummel device); 56240545573SHorst Hummel 56340545573SHorst Hummel if (IS_ERR(cqr)) { 56440545573SHorst Hummel DEV_MESSAGE(KERN_WARNING, device, "%s", 56540545573SHorst Hummel "Could not allocate PSF-SSC request"); 56640545573SHorst Hummel return cqr; 56740545573SHorst Hummel } 56840545573SHorst Hummel psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 56940545573SHorst Hummel psf_ssc_data->order = PSF_ORDER_SSC; 57040545573SHorst Hummel psf_ssc_data->suborder = 0x08; 57140545573SHorst Hummel 57240545573SHorst Hummel ccw = cqr->cpaddr; 57340545573SHorst Hummel ccw->cmd_code = DASD_ECKD_CCW_PSF; 57440545573SHorst Hummel ccw->cda = (__u32)(addr_t)psf_ssc_data; 57540545573SHorst Hummel ccw->count = 66; 57640545573SHorst Hummel 57740545573SHorst Hummel cqr->device = device; 57840545573SHorst Hummel cqr->expires = 10*HZ; 57940545573SHorst Hummel cqr->buildclk = get_clock(); 58040545573SHorst Hummel cqr->status = DASD_CQR_FILLED; 58140545573SHorst Hummel return cqr; 58240545573SHorst Hummel } 58340545573SHorst Hummel 58440545573SHorst Hummel /* 58540545573SHorst Hummel * Perform Subsystem Function. 58640545573SHorst Hummel * It is necessary to trigger CIO for channel revalidation since this 58740545573SHorst Hummel * call might change behaviour of DASD devices. 58840545573SHorst Hummel */ 58940545573SHorst Hummel static int 59040545573SHorst Hummel dasd_eckd_psf_ssc(struct dasd_device *device) 59140545573SHorst Hummel { 59240545573SHorst Hummel struct dasd_ccw_req *cqr; 59340545573SHorst Hummel int rc; 59440545573SHorst Hummel 59540545573SHorst Hummel cqr = dasd_eckd_build_psf_ssc(device); 59640545573SHorst Hummel if (IS_ERR(cqr)) 59740545573SHorst Hummel return PTR_ERR(cqr); 59840545573SHorst Hummel 59940545573SHorst Hummel rc = dasd_sleep_on(cqr); 60040545573SHorst Hummel if (!rc) 60140545573SHorst Hummel /* trigger CIO to reprobe devices */ 60240545573SHorst Hummel css_schedule_reprobe(); 60340545573SHorst Hummel dasd_sfree_request(cqr, cqr->device); 60440545573SHorst Hummel return rc; 60540545573SHorst Hummel } 60640545573SHorst Hummel 60740545573SHorst Hummel /* 60840545573SHorst Hummel * Valide storage server of current device. 60940545573SHorst Hummel */ 61040545573SHorst Hummel static int 61140545573SHorst Hummel dasd_eckd_validate_server(struct dasd_device *device) 61240545573SHorst Hummel { 61340545573SHorst Hummel int rc; 61440545573SHorst Hummel 61540545573SHorst Hummel /* Currently PAV is the only reason to 'validate' server on LPAR */ 61640545573SHorst Hummel if (dasd_nopav || MACHINE_IS_VM) 61740545573SHorst Hummel return 0; 61840545573SHorst Hummel 61940545573SHorst Hummel rc = dasd_eckd_psf_ssc(device); 62040545573SHorst Hummel if (rc) 62140545573SHorst Hummel /* may be requested feature is not available on server, 62240545573SHorst Hummel * therefore just report error and go ahead */ 62340545573SHorst Hummel DEV_MESSAGE(KERN_INFO, device, 62440545573SHorst Hummel "Perform Subsystem Function returned rc=%d", rc); 62540545573SHorst Hummel /* RE-Read Configuration Data */ 62640545573SHorst Hummel return dasd_eckd_read_conf(device); 62740545573SHorst Hummel } 62840545573SHorst Hummel 62940545573SHorst Hummel /* 6303d052595SHorst Hummel * Check device characteristics. 6313d052595SHorst Hummel * If the device is accessible using ECKD discipline, the device is enabled. 6323d052595SHorst Hummel */ 6331da177e4SLinus Torvalds static int 6341da177e4SLinus Torvalds dasd_eckd_check_characteristics(struct dasd_device *device) 6351da177e4SLinus Torvalds { 6361da177e4SLinus Torvalds struct dasd_eckd_private *private; 6373d052595SHorst Hummel struct dasd_uid uid; 6381da177e4SLinus Torvalds void *rdc_data; 6391da177e4SLinus Torvalds int rc; 6401da177e4SLinus Torvalds 6411da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 6421da177e4SLinus Torvalds if (private == NULL) { 643138c014dSHorst Hummel private = kzalloc(sizeof(struct dasd_eckd_private), 6441da177e4SLinus Torvalds GFP_KERNEL | GFP_DMA); 6451da177e4SLinus Torvalds if (private == NULL) { 6461da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 6471da177e4SLinus Torvalds "memory allocation failed for private " 6481da177e4SLinus Torvalds "data"); 6491da177e4SLinus Torvalds return -ENOMEM; 6501da177e4SLinus Torvalds } 6511da177e4SLinus Torvalds device->private = (void *) private; 6521da177e4SLinus Torvalds } 6531da177e4SLinus Torvalds /* Invalidate status of initial analysis. */ 6541da177e4SLinus Torvalds private->init_cqr_status = -1; 6551da177e4SLinus Torvalds /* Set default cache operations. */ 6561da177e4SLinus Torvalds private->attrib.operation = DASD_NORMAL_CACHE; 6571da177e4SLinus Torvalds private->attrib.nr_cyl = 0; 6581da177e4SLinus Torvalds 65940545573SHorst Hummel /* Read Configuration Data */ 66040545573SHorst Hummel rc = dasd_eckd_read_conf(device); 66140545573SHorst Hummel if (rc) 66240545573SHorst Hummel return rc; 66340545573SHorst Hummel 66440545573SHorst Hummel /* Generate device unique id and register in devmap */ 66540545573SHorst Hummel rc = dasd_eckd_generate_uid(device, &uid); 66640545573SHorst Hummel if (rc) 66740545573SHorst Hummel return rc; 66840545573SHorst Hummel rc = dasd_set_uid(device->cdev, &uid); 66940545573SHorst Hummel if (rc == 1) /* new server found */ 67040545573SHorst Hummel rc = dasd_eckd_validate_server(device); 67140545573SHorst Hummel if (rc) 67240545573SHorst Hummel return rc; 67340545573SHorst Hummel 6741da177e4SLinus Torvalds /* Read Device Characteristics */ 6751da177e4SLinus Torvalds rdc_data = (void *) &(private->rdc_data); 6763d052595SHorst Hummel memset(rdc_data, 0, sizeof(rdc_data)); 6771da177e4SLinus Torvalds rc = read_dev_chars(device->cdev, &rdc_data, 64); 67840545573SHorst Hummel if (rc) 6791da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, 68040545573SHorst Hummel "Read device characteristics returned " 68140545573SHorst Hummel "rc=%d", rc); 6821da177e4SLinus Torvalds 6831da177e4SLinus Torvalds DEV_MESSAGE(KERN_INFO, device, 6841da177e4SLinus Torvalds "%04X/%02X(CU:%04X/%02X) Cyl:%d Head:%d Sec:%d", 6851da177e4SLinus Torvalds private->rdc_data.dev_type, 6861da177e4SLinus Torvalds private->rdc_data.dev_model, 6871da177e4SLinus Torvalds private->rdc_data.cu_type, 6881da177e4SLinus Torvalds private->rdc_data.cu_model.model, 6891da177e4SLinus Torvalds private->rdc_data.no_cyl, 6901da177e4SLinus Torvalds private->rdc_data.trk_per_cyl, 6911da177e4SLinus Torvalds private->rdc_data.sec_per_trk); 6923d052595SHorst Hummel return rc; 6931da177e4SLinus Torvalds } 6941da177e4SLinus Torvalds 6951da177e4SLinus Torvalds static struct dasd_ccw_req * 6961da177e4SLinus Torvalds dasd_eckd_analysis_ccw(struct dasd_device *device) 6971da177e4SLinus Torvalds { 6981da177e4SLinus Torvalds struct dasd_eckd_private *private; 6991da177e4SLinus Torvalds struct eckd_count *count_data; 7001da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 7011da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 7021da177e4SLinus Torvalds struct ccw1 *ccw; 7031da177e4SLinus Torvalds int cplength, datasize; 7041da177e4SLinus Torvalds int i; 7051da177e4SLinus Torvalds 7061da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 7071da177e4SLinus Torvalds 7081da177e4SLinus Torvalds cplength = 8; 7091da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 7101da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 7111da177e4SLinus Torvalds cplength, datasize, device); 7121da177e4SLinus Torvalds if (IS_ERR(cqr)) 7131da177e4SLinus Torvalds return cqr; 7141da177e4SLinus Torvalds ccw = cqr->cpaddr; 7151da177e4SLinus Torvalds /* Define extent for the first 3 tracks. */ 7161da177e4SLinus Torvalds define_extent(ccw++, cqr->data, 0, 2, 7171da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device); 7181da177e4SLinus Torvalds LO_data = cqr->data + sizeof (struct DE_eckd_data); 7191da177e4SLinus Torvalds /* Locate record for the first 4 records on track 0. */ 7201da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 7211da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 0, 0, 4, 7221da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 7231da177e4SLinus Torvalds 7241da177e4SLinus Torvalds count_data = private->count_area; 7251da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 7261da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 7271da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 7281da177e4SLinus Torvalds ccw->flags = 0; 7291da177e4SLinus Torvalds ccw->count = 8; 7301da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 7311da177e4SLinus Torvalds ccw++; 7321da177e4SLinus Torvalds count_data++; 7331da177e4SLinus Torvalds } 7341da177e4SLinus Torvalds 7351da177e4SLinus Torvalds /* Locate record for the first record on track 2. */ 7361da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 7371da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 2, 0, 1, 7381da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 7391da177e4SLinus Torvalds /* Read count ccw. */ 7401da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 7411da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 7421da177e4SLinus Torvalds ccw->flags = 0; 7431da177e4SLinus Torvalds ccw->count = 8; 7441da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 7451da177e4SLinus Torvalds 7461da177e4SLinus Torvalds cqr->device = device; 7471da177e4SLinus Torvalds cqr->retries = 0; 7481da177e4SLinus Torvalds cqr->buildclk = get_clock(); 7491da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 7501da177e4SLinus Torvalds return cqr; 7511da177e4SLinus Torvalds } 7521da177e4SLinus Torvalds 7531da177e4SLinus Torvalds /* 7541da177e4SLinus Torvalds * This is the callback function for the init_analysis cqr. It saves 7551da177e4SLinus Torvalds * the status of the initial analysis ccw before it frees it and kicks 7561da177e4SLinus Torvalds * the device to continue the startup sequence. This will call 7571da177e4SLinus Torvalds * dasd_eckd_do_analysis again (if the devices has not been marked 7581da177e4SLinus Torvalds * for deletion in the meantime). 7591da177e4SLinus Torvalds */ 7601da177e4SLinus Torvalds static void 7611da177e4SLinus Torvalds dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, void *data) 7621da177e4SLinus Torvalds { 7631da177e4SLinus Torvalds struct dasd_eckd_private *private; 7641da177e4SLinus Torvalds struct dasd_device *device; 7651da177e4SLinus Torvalds 7661da177e4SLinus Torvalds device = init_cqr->device; 7671da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 7681da177e4SLinus Torvalds private->init_cqr_status = init_cqr->status; 7691da177e4SLinus Torvalds dasd_sfree_request(init_cqr, device); 7701da177e4SLinus Torvalds dasd_kick_device(device); 7711da177e4SLinus Torvalds } 7721da177e4SLinus Torvalds 7731da177e4SLinus Torvalds static int 7741da177e4SLinus Torvalds dasd_eckd_start_analysis(struct dasd_device *device) 7751da177e4SLinus Torvalds { 7761da177e4SLinus Torvalds struct dasd_eckd_private *private; 7771da177e4SLinus Torvalds struct dasd_ccw_req *init_cqr; 7781da177e4SLinus Torvalds 7791da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 7801da177e4SLinus Torvalds init_cqr = dasd_eckd_analysis_ccw(device); 7811da177e4SLinus Torvalds if (IS_ERR(init_cqr)) 7821da177e4SLinus Torvalds return PTR_ERR(init_cqr); 7831da177e4SLinus Torvalds init_cqr->callback = dasd_eckd_analysis_callback; 7841da177e4SLinus Torvalds init_cqr->callback_data = NULL; 7851da177e4SLinus Torvalds init_cqr->expires = 5*HZ; 7861da177e4SLinus Torvalds dasd_add_request_head(init_cqr); 7871da177e4SLinus Torvalds return -EAGAIN; 7881da177e4SLinus Torvalds } 7891da177e4SLinus Torvalds 7901da177e4SLinus Torvalds static int 7911da177e4SLinus Torvalds dasd_eckd_end_analysis(struct dasd_device *device) 7921da177e4SLinus Torvalds { 7931da177e4SLinus Torvalds struct dasd_eckd_private *private; 7941da177e4SLinus Torvalds struct eckd_count *count_area; 7951da177e4SLinus Torvalds unsigned int sb, blk_per_trk; 7961da177e4SLinus Torvalds int status, i; 7971da177e4SLinus Torvalds 7981da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 7991da177e4SLinus Torvalds status = private->init_cqr_status; 8001da177e4SLinus Torvalds private->init_cqr_status = -1; 8011da177e4SLinus Torvalds if (status != DASD_CQR_DONE) { 8021da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 8031da177e4SLinus Torvalds "volume analysis returned unformatted disk"); 8041da177e4SLinus Torvalds return -EMEDIUMTYPE; 8051da177e4SLinus Torvalds } 8061da177e4SLinus Torvalds 8071da177e4SLinus Torvalds private->uses_cdl = 1; 8081da177e4SLinus Torvalds /* Calculate number of blocks/records per track. */ 8091da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, device->bp_block); 8101da177e4SLinus Torvalds /* Check Track 0 for Compatible Disk Layout */ 8111da177e4SLinus Torvalds count_area = NULL; 8121da177e4SLinus Torvalds for (i = 0; i < 3; i++) { 8131da177e4SLinus Torvalds if (private->count_area[i].kl != 4 || 8141da177e4SLinus Torvalds private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4) { 8151da177e4SLinus Torvalds private->uses_cdl = 0; 8161da177e4SLinus Torvalds break; 8171da177e4SLinus Torvalds } 8181da177e4SLinus Torvalds } 8191da177e4SLinus Torvalds if (i == 3) 8201da177e4SLinus Torvalds count_area = &private->count_area[4]; 8211da177e4SLinus Torvalds 8221da177e4SLinus Torvalds if (private->uses_cdl == 0) { 8231da177e4SLinus Torvalds for (i = 0; i < 5; i++) { 8241da177e4SLinus Torvalds if ((private->count_area[i].kl != 0) || 8251da177e4SLinus Torvalds (private->count_area[i].dl != 8261da177e4SLinus Torvalds private->count_area[0].dl)) 8271da177e4SLinus Torvalds break; 8281da177e4SLinus Torvalds } 8291da177e4SLinus Torvalds if (i == 5) 8301da177e4SLinus Torvalds count_area = &private->count_area[0]; 8311da177e4SLinus Torvalds } else { 8321da177e4SLinus Torvalds if (private->count_area[3].record == 1) 8331da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 8341da177e4SLinus Torvalds "Trk 0: no records after VTOC!"); 8351da177e4SLinus Torvalds } 8361da177e4SLinus Torvalds if (count_area != NULL && count_area->kl == 0) { 8371da177e4SLinus Torvalds /* we found notthing violating our disk layout */ 8381da177e4SLinus Torvalds if (dasd_check_blocksize(count_area->dl) == 0) 8391da177e4SLinus Torvalds device->bp_block = count_area->dl; 8401da177e4SLinus Torvalds } 8411da177e4SLinus Torvalds if (device->bp_block == 0) { 8421da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 8431da177e4SLinus Torvalds "Volume has incompatible disk layout"); 8441da177e4SLinus Torvalds return -EMEDIUMTYPE; 8451da177e4SLinus Torvalds } 8461da177e4SLinus Torvalds device->s2b_shift = 0; /* bits to shift 512 to get a block */ 8471da177e4SLinus Torvalds for (sb = 512; sb < device->bp_block; sb = sb << 1) 8481da177e4SLinus Torvalds device->s2b_shift++; 8491da177e4SLinus Torvalds 8501da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, device->bp_block); 8511da177e4SLinus Torvalds device->blocks = (private->rdc_data.no_cyl * 8521da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 8531da177e4SLinus Torvalds blk_per_trk); 8541da177e4SLinus Torvalds 8551da177e4SLinus Torvalds DEV_MESSAGE(KERN_INFO, device, 8561da177e4SLinus Torvalds "(%dkB blks): %dkB at %dkB/trk %s", 8571da177e4SLinus Torvalds (device->bp_block >> 10), 8581da177e4SLinus Torvalds ((private->rdc_data.no_cyl * 8591da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 8601da177e4SLinus Torvalds blk_per_trk * (device->bp_block >> 9)) >> 1), 8611da177e4SLinus Torvalds ((blk_per_trk * device->bp_block) >> 10), 8621da177e4SLinus Torvalds private->uses_cdl ? 8631da177e4SLinus Torvalds "compatible disk layout" : "linux disk layout"); 8641da177e4SLinus Torvalds 8651da177e4SLinus Torvalds return 0; 8661da177e4SLinus Torvalds } 8671da177e4SLinus Torvalds 8681da177e4SLinus Torvalds static int 8691da177e4SLinus Torvalds dasd_eckd_do_analysis(struct dasd_device *device) 8701da177e4SLinus Torvalds { 8711da177e4SLinus Torvalds struct dasd_eckd_private *private; 8721da177e4SLinus Torvalds 8731da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 8741da177e4SLinus Torvalds if (private->init_cqr_status < 0) 8751da177e4SLinus Torvalds return dasd_eckd_start_analysis(device); 8761da177e4SLinus Torvalds else 8771da177e4SLinus Torvalds return dasd_eckd_end_analysis(device); 8781da177e4SLinus Torvalds } 8791da177e4SLinus Torvalds 8801da177e4SLinus Torvalds static int 8811da177e4SLinus Torvalds dasd_eckd_fill_geometry(struct dasd_device *device, struct hd_geometry *geo) 8821da177e4SLinus Torvalds { 8831da177e4SLinus Torvalds struct dasd_eckd_private *private; 8841da177e4SLinus Torvalds 8851da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 8861da177e4SLinus Torvalds if (dasd_check_blocksize(device->bp_block) == 0) { 8871da177e4SLinus Torvalds geo->sectors = recs_per_track(&private->rdc_data, 8881da177e4SLinus Torvalds 0, device->bp_block); 8891da177e4SLinus Torvalds } 8901da177e4SLinus Torvalds geo->cylinders = private->rdc_data.no_cyl; 8911da177e4SLinus Torvalds geo->heads = private->rdc_data.trk_per_cyl; 8921da177e4SLinus Torvalds return 0; 8931da177e4SLinus Torvalds } 8941da177e4SLinus Torvalds 8951da177e4SLinus Torvalds static struct dasd_ccw_req * 8961da177e4SLinus Torvalds dasd_eckd_format_device(struct dasd_device * device, 8971da177e4SLinus Torvalds struct format_data_t * fdata) 8981da177e4SLinus Torvalds { 8991da177e4SLinus Torvalds struct dasd_eckd_private *private; 9001da177e4SLinus Torvalds struct dasd_ccw_req *fcp; 9011da177e4SLinus Torvalds struct eckd_count *ect; 9021da177e4SLinus Torvalds struct ccw1 *ccw; 9031da177e4SLinus Torvalds void *data; 9041da177e4SLinus Torvalds int rpt, cyl, head; 9051da177e4SLinus Torvalds int cplength, datasize; 9061da177e4SLinus Torvalds int i; 9071da177e4SLinus Torvalds 9081da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 9091da177e4SLinus Torvalds rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize); 9101da177e4SLinus Torvalds cyl = fdata->start_unit / private->rdc_data.trk_per_cyl; 9111da177e4SLinus Torvalds head = fdata->start_unit % private->rdc_data.trk_per_cyl; 9121da177e4SLinus Torvalds 9131da177e4SLinus Torvalds /* Sanity checks. */ 9141da177e4SLinus Torvalds if (fdata->start_unit >= 9151da177e4SLinus Torvalds (private->rdc_data.no_cyl * private->rdc_data.trk_per_cyl)) { 9161da177e4SLinus Torvalds DEV_MESSAGE(KERN_INFO, device, "Track no %d too big!", 9171da177e4SLinus Torvalds fdata->start_unit); 9181da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 9191da177e4SLinus Torvalds } 9201da177e4SLinus Torvalds if (fdata->start_unit > fdata->stop_unit) { 9211da177e4SLinus Torvalds DEV_MESSAGE(KERN_INFO, device, "Track %d reached! ending.", 9221da177e4SLinus Torvalds fdata->start_unit); 9231da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 9241da177e4SLinus Torvalds } 9251da177e4SLinus Torvalds if (dasd_check_blocksize(fdata->blksize) != 0) { 9261da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, 9271da177e4SLinus Torvalds "Invalid blocksize %d...terminating!", 9281da177e4SLinus Torvalds fdata->blksize); 9291da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 9301da177e4SLinus Torvalds } 9311da177e4SLinus Torvalds 9321da177e4SLinus Torvalds /* 9331da177e4SLinus Torvalds * fdata->intensity is a bit string that tells us what to do: 9341da177e4SLinus Torvalds * Bit 0: write record zero 9351da177e4SLinus Torvalds * Bit 1: write home address, currently not supported 9361da177e4SLinus Torvalds * Bit 2: invalidate tracks 9371da177e4SLinus Torvalds * Bit 3: use OS/390 compatible disk layout (cdl) 9381da177e4SLinus Torvalds * Only some bit combinations do make sense. 9391da177e4SLinus Torvalds */ 9401da177e4SLinus Torvalds switch (fdata->intensity) { 9411da177e4SLinus Torvalds case 0x00: /* Normal format */ 9421da177e4SLinus Torvalds case 0x08: /* Normal format, use cdl. */ 9431da177e4SLinus Torvalds cplength = 2 + rpt; 9441da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 9451da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 9461da177e4SLinus Torvalds rpt * sizeof(struct eckd_count); 9471da177e4SLinus Torvalds break; 9481da177e4SLinus Torvalds case 0x01: /* Write record zero and format track. */ 9491da177e4SLinus Torvalds case 0x09: /* Write record zero and format track, use cdl. */ 9501da177e4SLinus Torvalds cplength = 3 + rpt; 9511da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 9521da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 9531da177e4SLinus Torvalds sizeof(struct eckd_count) + 9541da177e4SLinus Torvalds rpt * sizeof(struct eckd_count); 9551da177e4SLinus Torvalds break; 9561da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 9571da177e4SLinus Torvalds case 0x0c: /* Invalidate track, use cdl. */ 9581da177e4SLinus Torvalds cplength = 3; 9591da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 9601da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 9611da177e4SLinus Torvalds sizeof(struct eckd_count); 9621da177e4SLinus Torvalds break; 9631da177e4SLinus Torvalds default: 9641da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "Invalid flags 0x%x.", 9651da177e4SLinus Torvalds fdata->intensity); 9661da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 9671da177e4SLinus Torvalds } 9681da177e4SLinus Torvalds /* Allocate the format ccw request. */ 9691da177e4SLinus Torvalds fcp = dasd_smalloc_request(dasd_eckd_discipline.name, 9701da177e4SLinus Torvalds cplength, datasize, device); 9711da177e4SLinus Torvalds if (IS_ERR(fcp)) 9721da177e4SLinus Torvalds return fcp; 9731da177e4SLinus Torvalds 9741da177e4SLinus Torvalds data = fcp->data; 9751da177e4SLinus Torvalds ccw = fcp->cpaddr; 9761da177e4SLinus Torvalds 9771da177e4SLinus Torvalds switch (fdata->intensity & ~0x08) { 9781da177e4SLinus Torvalds case 0x00: /* Normal format. */ 9791da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 9801da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 9811da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device); 9821da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 9831da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 9841da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 9851da177e4SLinus Torvalds fdata->start_unit, 0, rpt, 9861da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device, 9871da177e4SLinus Torvalds fdata->blksize); 9881da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 9891da177e4SLinus Torvalds break; 9901da177e4SLinus Torvalds case 0x01: /* Write record zero + format track. */ 9911da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 9921da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 9931da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, 9941da177e4SLinus Torvalds device); 9951da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 9961da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 9971da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 9981da177e4SLinus Torvalds fdata->start_unit, 0, rpt + 1, 9991da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, device, 10001da177e4SLinus Torvalds device->bp_block); 10011da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 10021da177e4SLinus Torvalds break; 10031da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 10041da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 10051da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 10061da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device); 10071da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 10081da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 10091da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 10101da177e4SLinus Torvalds fdata->start_unit, 0, 1, 10111da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device, 8); 10121da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 10131da177e4SLinus Torvalds break; 10141da177e4SLinus Torvalds } 10151da177e4SLinus Torvalds if (fdata->intensity & 0x01) { /* write record zero */ 10161da177e4SLinus Torvalds ect = (struct eckd_count *) data; 10171da177e4SLinus Torvalds data += sizeof(struct eckd_count); 10181da177e4SLinus Torvalds ect->cyl = cyl; 10191da177e4SLinus Torvalds ect->head = head; 10201da177e4SLinus Torvalds ect->record = 0; 10211da177e4SLinus Torvalds ect->kl = 0; 10221da177e4SLinus Torvalds ect->dl = 8; 10231da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 10241da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 10251da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 10261da177e4SLinus Torvalds ccw->count = 8; 10271da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 10281da177e4SLinus Torvalds ccw++; 10291da177e4SLinus Torvalds } 10301da177e4SLinus Torvalds if ((fdata->intensity & ~0x08) & 0x04) { /* erase track */ 10311da177e4SLinus Torvalds ect = (struct eckd_count *) data; 10321da177e4SLinus Torvalds data += sizeof(struct eckd_count); 10331da177e4SLinus Torvalds ect->cyl = cyl; 10341da177e4SLinus Torvalds ect->head = head; 10351da177e4SLinus Torvalds ect->record = 1; 10361da177e4SLinus Torvalds ect->kl = 0; 10371da177e4SLinus Torvalds ect->dl = 0; 10381da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 10391da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 10401da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 10411da177e4SLinus Torvalds ccw->count = 8; 10421da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 10431da177e4SLinus Torvalds } else { /* write remaining records */ 10441da177e4SLinus Torvalds for (i = 0; i < rpt; i++) { 10451da177e4SLinus Torvalds ect = (struct eckd_count *) data; 10461da177e4SLinus Torvalds data += sizeof(struct eckd_count); 10471da177e4SLinus Torvalds ect->cyl = cyl; 10481da177e4SLinus Torvalds ect->head = head; 10491da177e4SLinus Torvalds ect->record = i + 1; 10501da177e4SLinus Torvalds ect->kl = 0; 10511da177e4SLinus Torvalds ect->dl = fdata->blksize; 10521da177e4SLinus Torvalds /* Check for special tracks 0-1 when formatting CDL */ 10531da177e4SLinus Torvalds if ((fdata->intensity & 0x08) && 10541da177e4SLinus Torvalds fdata->start_unit == 0) { 10551da177e4SLinus Torvalds if (i < 3) { 10561da177e4SLinus Torvalds ect->kl = 4; 10571da177e4SLinus Torvalds ect->dl = sizes_trk0[i] - 4; 10581da177e4SLinus Torvalds } 10591da177e4SLinus Torvalds } 10601da177e4SLinus Torvalds if ((fdata->intensity & 0x08) && 10611da177e4SLinus Torvalds fdata->start_unit == 1) { 10621da177e4SLinus Torvalds ect->kl = 44; 10631da177e4SLinus Torvalds ect->dl = LABEL_SIZE - 44; 10641da177e4SLinus Torvalds } 10651da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 10661da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 10671da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 10681da177e4SLinus Torvalds ccw->count = 8; 10691da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 10701da177e4SLinus Torvalds ccw++; 10711da177e4SLinus Torvalds } 10721da177e4SLinus Torvalds } 10731da177e4SLinus Torvalds fcp->device = device; 10741da177e4SLinus Torvalds fcp->retries = 2; /* set retry counter to enable ERP */ 10751da177e4SLinus Torvalds fcp->buildclk = get_clock(); 10761da177e4SLinus Torvalds fcp->status = DASD_CQR_FILLED; 10771da177e4SLinus Torvalds return fcp; 10781da177e4SLinus Torvalds } 10791da177e4SLinus Torvalds 10801da177e4SLinus Torvalds static dasd_era_t 10811da177e4SLinus Torvalds dasd_eckd_examine_error(struct dasd_ccw_req * cqr, struct irb * irb) 10821da177e4SLinus Torvalds { 10831da177e4SLinus Torvalds struct dasd_device *device = (struct dasd_device *) cqr->device; 10841da177e4SLinus Torvalds struct ccw_device *cdev = device->cdev; 10851da177e4SLinus Torvalds 10861da177e4SLinus Torvalds if (irb->scsw.cstat == 0x00 && 10871da177e4SLinus Torvalds irb->scsw.dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END)) 10881da177e4SLinus Torvalds return dasd_era_none; 10891da177e4SLinus Torvalds 10901da177e4SLinus Torvalds switch (cdev->id.cu_type) { 10911da177e4SLinus Torvalds case 0x3990: 10921da177e4SLinus Torvalds case 0x2105: 10931da177e4SLinus Torvalds case 0x2107: 10941da177e4SLinus Torvalds case 0x1750: 10951da177e4SLinus Torvalds return dasd_3990_erp_examine(cqr, irb); 10961da177e4SLinus Torvalds case 0x9343: 10971da177e4SLinus Torvalds return dasd_9343_erp_examine(cqr, irb); 10981da177e4SLinus Torvalds case 0x3880: 10991da177e4SLinus Torvalds default: 11001da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 11011da177e4SLinus Torvalds "default (unknown CU type) - RECOVERABLE return"); 11021da177e4SLinus Torvalds return dasd_era_recover; 11031da177e4SLinus Torvalds } 11041da177e4SLinus Torvalds } 11051da177e4SLinus Torvalds 11061da177e4SLinus Torvalds static dasd_erp_fn_t 11071da177e4SLinus Torvalds dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 11081da177e4SLinus Torvalds { 11091da177e4SLinus Torvalds struct dasd_device *device = (struct dasd_device *) cqr->device; 11101da177e4SLinus Torvalds struct ccw_device *cdev = device->cdev; 11111da177e4SLinus Torvalds 11121da177e4SLinus Torvalds switch (cdev->id.cu_type) { 11131da177e4SLinus Torvalds case 0x3990: 11141da177e4SLinus Torvalds case 0x2105: 11151da177e4SLinus Torvalds case 0x2107: 11161da177e4SLinus Torvalds case 0x1750: 11171da177e4SLinus Torvalds return dasd_3990_erp_action; 11181da177e4SLinus Torvalds case 0x9343: 11191da177e4SLinus Torvalds case 0x3880: 11201da177e4SLinus Torvalds default: 11211da177e4SLinus Torvalds return dasd_default_erp_action; 11221da177e4SLinus Torvalds } 11231da177e4SLinus Torvalds } 11241da177e4SLinus Torvalds 11251da177e4SLinus Torvalds static dasd_erp_fn_t 11261da177e4SLinus Torvalds dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 11271da177e4SLinus Torvalds { 11281da177e4SLinus Torvalds return dasd_default_erp_postaction; 11291da177e4SLinus Torvalds } 11301da177e4SLinus Torvalds 11311da177e4SLinus Torvalds static struct dasd_ccw_req * 11321da177e4SLinus Torvalds dasd_eckd_build_cp(struct dasd_device * device, struct request *req) 11331da177e4SLinus Torvalds { 11341da177e4SLinus Torvalds struct dasd_eckd_private *private; 11351da177e4SLinus Torvalds unsigned long *idaws; 11361da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 11371da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 11381da177e4SLinus Torvalds struct ccw1 *ccw; 11391da177e4SLinus Torvalds struct bio *bio; 11401da177e4SLinus Torvalds struct bio_vec *bv; 11411da177e4SLinus Torvalds char *dst; 11421da177e4SLinus Torvalds unsigned int blksize, blk_per_trk, off; 11431da177e4SLinus Torvalds int count, cidaw, cplength, datasize; 11441da177e4SLinus Torvalds sector_t recid, first_rec, last_rec; 11451da177e4SLinus Torvalds sector_t first_trk, last_trk; 11461da177e4SLinus Torvalds unsigned int first_offs, last_offs; 11471da177e4SLinus Torvalds unsigned char cmd, rcmd; 11481da177e4SLinus Torvalds int i; 11491da177e4SLinus Torvalds 11501da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 11511da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 11521da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_READ_MT; 11531da177e4SLinus Torvalds else if (rq_data_dir(req) == WRITE) 11541da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_WRITE_MT; 11551da177e4SLinus Torvalds else 11561da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 11571da177e4SLinus Torvalds /* Calculate number of blocks/records per track. */ 11581da177e4SLinus Torvalds blksize = device->bp_block; 11591da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 11601da177e4SLinus Torvalds /* Calculate record id of first and last block. */ 11611da177e4SLinus Torvalds first_rec = first_trk = req->sector >> device->s2b_shift; 11621da177e4SLinus Torvalds first_offs = sector_div(first_trk, blk_per_trk); 11631da177e4SLinus Torvalds last_rec = last_trk = 11641da177e4SLinus Torvalds (req->sector + req->nr_sectors - 1) >> device->s2b_shift; 11651da177e4SLinus Torvalds last_offs = sector_div(last_trk, blk_per_trk); 11661da177e4SLinus Torvalds /* Check struct bio and count the number of blocks for the request. */ 11671da177e4SLinus Torvalds count = 0; 11681da177e4SLinus Torvalds cidaw = 0; 11691da177e4SLinus Torvalds rq_for_each_bio(bio, req) { 11701da177e4SLinus Torvalds bio_for_each_segment(bv, bio, i) { 11711da177e4SLinus Torvalds if (bv->bv_len & (blksize - 1)) 11721da177e4SLinus Torvalds /* Eckd can only do full blocks. */ 11731da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 11741da177e4SLinus Torvalds count += bv->bv_len >> (device->s2b_shift + 9); 1175347a8dc3SMartin Schwidefsky #if defined(CONFIG_64BIT) 11761da177e4SLinus Torvalds if (idal_is_needed (page_address(bv->bv_page), 11771da177e4SLinus Torvalds bv->bv_len)) 11781da177e4SLinus Torvalds cidaw += bv->bv_len >> (device->s2b_shift + 9); 11791da177e4SLinus Torvalds #endif 11801da177e4SLinus Torvalds } 11811da177e4SLinus Torvalds } 11821da177e4SLinus Torvalds /* Paranoia. */ 11831da177e4SLinus Torvalds if (count != last_rec - first_rec + 1) 11841da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 11851da177e4SLinus Torvalds /* 1x define extent + 1x locate record + number of blocks */ 11861da177e4SLinus Torvalds cplength = 2 + count; 11871da177e4SLinus Torvalds /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 11881da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + sizeof(struct LO_eckd_data) + 11891da177e4SLinus Torvalds cidaw * sizeof(unsigned long); 11901da177e4SLinus Torvalds /* Find out the number of additional locate record ccws for cdl. */ 11911da177e4SLinus Torvalds if (private->uses_cdl && first_rec < 2*blk_per_trk) { 11921da177e4SLinus Torvalds if (last_rec >= 2*blk_per_trk) 11931da177e4SLinus Torvalds count = 2*blk_per_trk - first_rec; 11941da177e4SLinus Torvalds cplength += count; 11951da177e4SLinus Torvalds datasize += count*sizeof(struct LO_eckd_data); 11961da177e4SLinus Torvalds } 11971da177e4SLinus Torvalds /* Allocate the ccw request. */ 11981da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 11991da177e4SLinus Torvalds cplength, datasize, device); 12001da177e4SLinus Torvalds if (IS_ERR(cqr)) 12011da177e4SLinus Torvalds return cqr; 12021da177e4SLinus Torvalds ccw = cqr->cpaddr; 12031da177e4SLinus Torvalds /* First ccw is define extent. */ 12041da177e4SLinus Torvalds define_extent(ccw++, cqr->data, first_trk, last_trk, cmd, device); 12051da177e4SLinus Torvalds /* Build locate_record+read/write/ccws. */ 12061da177e4SLinus Torvalds idaws = (unsigned long *) (cqr->data + sizeof(struct DE_eckd_data)); 12071da177e4SLinus Torvalds LO_data = (struct LO_eckd_data *) (idaws + cidaw); 12081da177e4SLinus Torvalds recid = first_rec; 12091da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 12101da177e4SLinus Torvalds /* Only standard blocks so there is just one locate record. */ 12111da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 12121da177e4SLinus Torvalds locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 12131da177e4SLinus Torvalds last_rec - recid + 1, cmd, device, blksize); 12141da177e4SLinus Torvalds } 12151da177e4SLinus Torvalds rq_for_each_bio(bio, req) bio_for_each_segment(bv, bio, i) { 12161da177e4SLinus Torvalds dst = page_address(bv->bv_page) + bv->bv_offset; 12171da177e4SLinus Torvalds if (dasd_page_cache) { 12181da177e4SLinus Torvalds char *copy = kmem_cache_alloc(dasd_page_cache, 12191da177e4SLinus Torvalds SLAB_DMA | __GFP_NOWARN); 12201da177e4SLinus Torvalds if (copy && rq_data_dir(req) == WRITE) 12211da177e4SLinus Torvalds memcpy(copy + bv->bv_offset, dst, bv->bv_len); 12221da177e4SLinus Torvalds if (copy) 12231da177e4SLinus Torvalds dst = copy + bv->bv_offset; 12241da177e4SLinus Torvalds } 12251da177e4SLinus Torvalds for (off = 0; off < bv->bv_len; off += blksize) { 12261da177e4SLinus Torvalds sector_t trkid = recid; 12271da177e4SLinus Torvalds unsigned int recoffs = sector_div(trkid, blk_per_trk); 12281da177e4SLinus Torvalds rcmd = cmd; 12291da177e4SLinus Torvalds count = blksize; 12301da177e4SLinus Torvalds /* Locate record for cdl special block ? */ 12311da177e4SLinus Torvalds if (private->uses_cdl && recid < 2*blk_per_trk) { 12321da177e4SLinus Torvalds if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 12331da177e4SLinus Torvalds rcmd |= 0x8; 12341da177e4SLinus Torvalds count = dasd_eckd_cdl_reclen(recid); 1235ec5883abSHorst Hummel if (count < blksize && 1236ec5883abSHorst Hummel rq_data_dir(req) == READ) 12371da177e4SLinus Torvalds memset(dst + count, 0xe5, 12381da177e4SLinus Torvalds blksize - count); 12391da177e4SLinus Torvalds } 12401da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 12411da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 12421da177e4SLinus Torvalds trkid, recoffs + 1, 12431da177e4SLinus Torvalds 1, rcmd, device, count); 12441da177e4SLinus Torvalds } 12451da177e4SLinus Torvalds /* Locate record for standard blocks ? */ 12461da177e4SLinus Torvalds if (private->uses_cdl && recid == 2*blk_per_trk) { 12471da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 12481da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 12491da177e4SLinus Torvalds trkid, recoffs + 1, 12501da177e4SLinus Torvalds last_rec - recid + 1, 12511da177e4SLinus Torvalds cmd, device, count); 12521da177e4SLinus Torvalds } 12531da177e4SLinus Torvalds /* Read/write ccw. */ 12541da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 12551da177e4SLinus Torvalds ccw->cmd_code = rcmd; 12561da177e4SLinus Torvalds ccw->count = count; 12571da177e4SLinus Torvalds if (idal_is_needed(dst, blksize)) { 12581da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) idaws; 12591da177e4SLinus Torvalds ccw->flags = CCW_FLAG_IDA; 12601da177e4SLinus Torvalds idaws = idal_create_words(idaws, dst, blksize); 12611da177e4SLinus Torvalds } else { 12621da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) dst; 12631da177e4SLinus Torvalds ccw->flags = 0; 12641da177e4SLinus Torvalds } 12651da177e4SLinus Torvalds ccw++; 12661da177e4SLinus Torvalds dst += blksize; 12671da177e4SLinus Torvalds recid++; 12681da177e4SLinus Torvalds } 12691da177e4SLinus Torvalds } 12701c01b8a5SHorst Hummel if (req->flags & REQ_FAILFAST) 12711c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 12721da177e4SLinus Torvalds cqr->device = device; 12731da177e4SLinus Torvalds cqr->expires = 5 * 60 * HZ; /* 5 minutes */ 12741da177e4SLinus Torvalds cqr->lpm = private->path_data.ppm; 12751da177e4SLinus Torvalds cqr->retries = 256; 12761da177e4SLinus Torvalds cqr->buildclk = get_clock(); 12771da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 12781da177e4SLinus Torvalds return cqr; 12791da177e4SLinus Torvalds } 12801da177e4SLinus Torvalds 12811da177e4SLinus Torvalds static int 12821da177e4SLinus Torvalds dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 12831da177e4SLinus Torvalds { 12841da177e4SLinus Torvalds struct dasd_eckd_private *private; 12851da177e4SLinus Torvalds struct ccw1 *ccw; 12861da177e4SLinus Torvalds struct bio *bio; 12871da177e4SLinus Torvalds struct bio_vec *bv; 12881da177e4SLinus Torvalds char *dst, *cda; 12891da177e4SLinus Torvalds unsigned int blksize, blk_per_trk, off; 12901da177e4SLinus Torvalds sector_t recid; 12911da177e4SLinus Torvalds int i, status; 12921da177e4SLinus Torvalds 12931da177e4SLinus Torvalds if (!dasd_page_cache) 12941da177e4SLinus Torvalds goto out; 12951da177e4SLinus Torvalds private = (struct dasd_eckd_private *) cqr->device->private; 12961da177e4SLinus Torvalds blksize = cqr->device->bp_block; 12971da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 12981da177e4SLinus Torvalds recid = req->sector >> cqr->device->s2b_shift; 12991da177e4SLinus Torvalds ccw = cqr->cpaddr; 13001da177e4SLinus Torvalds /* Skip over define extent & locate record. */ 13011da177e4SLinus Torvalds ccw++; 13021da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 13031da177e4SLinus Torvalds ccw++; 13041da177e4SLinus Torvalds rq_for_each_bio(bio, req) bio_for_each_segment(bv, bio, i) { 13051da177e4SLinus Torvalds dst = page_address(bv->bv_page) + bv->bv_offset; 13061da177e4SLinus Torvalds for (off = 0; off < bv->bv_len; off += blksize) { 13071da177e4SLinus Torvalds /* Skip locate record. */ 13081da177e4SLinus Torvalds if (private->uses_cdl && recid <= 2*blk_per_trk) 13091da177e4SLinus Torvalds ccw++; 13101da177e4SLinus Torvalds if (dst) { 13111da177e4SLinus Torvalds if (ccw->flags & CCW_FLAG_IDA) 13121da177e4SLinus Torvalds cda = *((char **)((addr_t) ccw->cda)); 13131da177e4SLinus Torvalds else 13141da177e4SLinus Torvalds cda = (char *)((addr_t) ccw->cda); 13151da177e4SLinus Torvalds if (dst != cda) { 13161da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 13171da177e4SLinus Torvalds memcpy(dst, cda, bv->bv_len); 13181da177e4SLinus Torvalds kmem_cache_free(dasd_page_cache, 13191da177e4SLinus Torvalds (void *)((addr_t)cda & PAGE_MASK)); 13201da177e4SLinus Torvalds } 13211da177e4SLinus Torvalds dst = NULL; 13221da177e4SLinus Torvalds } 13231da177e4SLinus Torvalds ccw++; 13241da177e4SLinus Torvalds recid++; 13251da177e4SLinus Torvalds } 13261da177e4SLinus Torvalds } 13271da177e4SLinus Torvalds out: 13281da177e4SLinus Torvalds status = cqr->status == DASD_CQR_DONE; 13291da177e4SLinus Torvalds dasd_sfree_request(cqr, cqr->device); 13301da177e4SLinus Torvalds return status; 13311da177e4SLinus Torvalds } 13321da177e4SLinus Torvalds 13331da177e4SLinus Torvalds static int 13341da177e4SLinus Torvalds dasd_eckd_fill_info(struct dasd_device * device, 13351da177e4SLinus Torvalds struct dasd_information2_t * info) 13361da177e4SLinus Torvalds { 13371da177e4SLinus Torvalds struct dasd_eckd_private *private; 13381da177e4SLinus Torvalds 13391da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 13401da177e4SLinus Torvalds info->label_block = 2; 13411da177e4SLinus Torvalds info->FBA_layout = private->uses_cdl ? 0 : 1; 13421da177e4SLinus Torvalds info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 13431da177e4SLinus Torvalds info->characteristics_size = sizeof(struct dasd_eckd_characteristics); 13441da177e4SLinus Torvalds memcpy(info->characteristics, &private->rdc_data, 13451da177e4SLinus Torvalds sizeof(struct dasd_eckd_characteristics)); 13461da177e4SLinus Torvalds info->confdata_size = sizeof (struct dasd_eckd_confdata); 13471da177e4SLinus Torvalds memcpy(info->configuration_data, &private->conf_data, 13481da177e4SLinus Torvalds sizeof (struct dasd_eckd_confdata)); 13491da177e4SLinus Torvalds return 0; 13501da177e4SLinus Torvalds } 13511da177e4SLinus Torvalds 13521da177e4SLinus Torvalds /* 13531da177e4SLinus Torvalds * SECTION: ioctl functions for eckd devices. 13541da177e4SLinus Torvalds */ 13551da177e4SLinus Torvalds 13561da177e4SLinus Torvalds /* 13571da177e4SLinus Torvalds * Release device ioctl. 13581da177e4SLinus Torvalds * Buils a channel programm to releases a prior reserved 13591da177e4SLinus Torvalds * (see dasd_eckd_reserve) device. 13601da177e4SLinus Torvalds */ 13611da177e4SLinus Torvalds static int 13621107ccfbSChristoph Hellwig dasd_eckd_release(struct dasd_device *device) 13631da177e4SLinus Torvalds { 13641da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 13651da177e4SLinus Torvalds int rc; 13661da177e4SLinus Torvalds 13671da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 13681da177e4SLinus Torvalds return -EACCES; 13691da177e4SLinus Torvalds 13701da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 13711da177e4SLinus Torvalds 1, 32, device); 13721da177e4SLinus Torvalds if (IS_ERR(cqr)) { 13731da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 13741da177e4SLinus Torvalds "Could not allocate initialization request"); 13751da177e4SLinus Torvalds return PTR_ERR(cqr); 13761da177e4SLinus Torvalds } 13771da177e4SLinus Torvalds cqr->cpaddr->cmd_code = DASD_ECKD_CCW_RELEASE; 13781da177e4SLinus Torvalds cqr->cpaddr->flags |= CCW_FLAG_SLI; 13791da177e4SLinus Torvalds cqr->cpaddr->count = 32; 13801da177e4SLinus Torvalds cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; 13811da177e4SLinus Torvalds cqr->device = device; 13821da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 13831c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 13841da177e4SLinus Torvalds cqr->retries = 0; 13851da177e4SLinus Torvalds cqr->expires = 2 * HZ; 13861da177e4SLinus Torvalds cqr->buildclk = get_clock(); 13871da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 13881da177e4SLinus Torvalds 13891da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 13901da177e4SLinus Torvalds 13911da177e4SLinus Torvalds dasd_sfree_request(cqr, cqr->device); 13921da177e4SLinus Torvalds return rc; 13931da177e4SLinus Torvalds } 13941da177e4SLinus Torvalds 13951da177e4SLinus Torvalds /* 13961da177e4SLinus Torvalds * Reserve device ioctl. 13971da177e4SLinus Torvalds * Options are set to 'synchronous wait for interrupt' and 13981da177e4SLinus Torvalds * 'timeout the request'. This leads to a terminate IO if 13991da177e4SLinus Torvalds * the interrupt is outstanding for a certain time. 14001da177e4SLinus Torvalds */ 14011da177e4SLinus Torvalds static int 14021107ccfbSChristoph Hellwig dasd_eckd_reserve(struct dasd_device *device) 14031da177e4SLinus Torvalds { 14041da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 14051da177e4SLinus Torvalds int rc; 14061da177e4SLinus Torvalds 14071da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 14081da177e4SLinus Torvalds return -EACCES; 14091da177e4SLinus Torvalds 14101da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 14111da177e4SLinus Torvalds 1, 32, device); 14121da177e4SLinus Torvalds if (IS_ERR(cqr)) { 14131da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 14141da177e4SLinus Torvalds "Could not allocate initialization request"); 14151da177e4SLinus Torvalds return PTR_ERR(cqr); 14161da177e4SLinus Torvalds } 14171da177e4SLinus Torvalds cqr->cpaddr->cmd_code = DASD_ECKD_CCW_RESERVE; 14181da177e4SLinus Torvalds cqr->cpaddr->flags |= CCW_FLAG_SLI; 14191da177e4SLinus Torvalds cqr->cpaddr->count = 32; 14201da177e4SLinus Torvalds cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; 14211da177e4SLinus Torvalds cqr->device = device; 14221da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 14231c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 14241da177e4SLinus Torvalds cqr->retries = 0; 14251da177e4SLinus Torvalds cqr->expires = 2 * HZ; 14261da177e4SLinus Torvalds cqr->buildclk = get_clock(); 14271da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 14281da177e4SLinus Torvalds 14291da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 14301da177e4SLinus Torvalds 14311da177e4SLinus Torvalds dasd_sfree_request(cqr, cqr->device); 14321da177e4SLinus Torvalds return rc; 14331da177e4SLinus Torvalds } 14341da177e4SLinus Torvalds 14351da177e4SLinus Torvalds /* 14361da177e4SLinus Torvalds * Steal lock ioctl - unconditional reserve device. 14371da177e4SLinus Torvalds * Buils a channel programm to break a device's reservation. 14381da177e4SLinus Torvalds * (unconditional reserve) 14391da177e4SLinus Torvalds */ 14401da177e4SLinus Torvalds static int 14411107ccfbSChristoph Hellwig dasd_eckd_steal_lock(struct dasd_device *device) 14421da177e4SLinus Torvalds { 14431da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 14441da177e4SLinus Torvalds int rc; 14451da177e4SLinus Torvalds 14461da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 14471da177e4SLinus Torvalds return -EACCES; 14481da177e4SLinus Torvalds 14491da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 14501da177e4SLinus Torvalds 1, 32, device); 14511da177e4SLinus Torvalds if (IS_ERR(cqr)) { 14521da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 14531da177e4SLinus Torvalds "Could not allocate initialization request"); 14541da177e4SLinus Torvalds return PTR_ERR(cqr); 14551da177e4SLinus Torvalds } 14561da177e4SLinus Torvalds cqr->cpaddr->cmd_code = DASD_ECKD_CCW_SLCK; 14571da177e4SLinus Torvalds cqr->cpaddr->flags |= CCW_FLAG_SLI; 14581da177e4SLinus Torvalds cqr->cpaddr->count = 32; 14591da177e4SLinus Torvalds cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; 14601da177e4SLinus Torvalds cqr->device = device; 14611da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 14621c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 14631da177e4SLinus Torvalds cqr->retries = 0; 14641da177e4SLinus Torvalds cqr->expires = 2 * HZ; 14651da177e4SLinus Torvalds cqr->buildclk = get_clock(); 14661da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 14671da177e4SLinus Torvalds 14681da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 14691da177e4SLinus Torvalds 14701da177e4SLinus Torvalds dasd_sfree_request(cqr, cqr->device); 14711da177e4SLinus Torvalds return rc; 14721da177e4SLinus Torvalds } 14731da177e4SLinus Torvalds 14741da177e4SLinus Torvalds /* 14751da177e4SLinus Torvalds * Read performance statistics 14761da177e4SLinus Torvalds */ 14771da177e4SLinus Torvalds static int 14781107ccfbSChristoph Hellwig dasd_eckd_performance(struct dasd_device *device, void __user *argp) 14791da177e4SLinus Torvalds { 14801da177e4SLinus Torvalds struct dasd_psf_prssd_data *prssdp; 14811da177e4SLinus Torvalds struct dasd_rssd_perf_stats_t *stats; 14821da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 14831da177e4SLinus Torvalds struct ccw1 *ccw; 14841da177e4SLinus Torvalds int rc; 14851da177e4SLinus Torvalds 14861da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 14871da177e4SLinus Torvalds 1 /* PSF */ + 1 /* RSSD */ , 14881da177e4SLinus Torvalds (sizeof (struct dasd_psf_prssd_data) + 14891da177e4SLinus Torvalds sizeof (struct dasd_rssd_perf_stats_t)), 14901da177e4SLinus Torvalds device); 14911da177e4SLinus Torvalds if (IS_ERR(cqr)) { 14921da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 14931da177e4SLinus Torvalds "Could not allocate initialization request"); 14941da177e4SLinus Torvalds return PTR_ERR(cqr); 14951da177e4SLinus Torvalds } 14961da177e4SLinus Torvalds cqr->device = device; 14971da177e4SLinus Torvalds cqr->retries = 0; 14981da177e4SLinus Torvalds cqr->expires = 10 * HZ; 14991da177e4SLinus Torvalds 15001da177e4SLinus Torvalds /* Prepare for Read Subsystem Data */ 15011da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 15021da177e4SLinus Torvalds memset(prssdp, 0, sizeof (struct dasd_psf_prssd_data)); 15031da177e4SLinus Torvalds prssdp->order = PSF_ORDER_PRSSD; 15041da177e4SLinus Torvalds prssdp->suborder = 0x01; /* Perfomance Statistics */ 15051da177e4SLinus Torvalds prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 15061da177e4SLinus Torvalds 15071da177e4SLinus Torvalds ccw = cqr->cpaddr; 15081da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_PSF; 15091da177e4SLinus Torvalds ccw->count = sizeof (struct dasd_psf_prssd_data); 15101da177e4SLinus Torvalds ccw->flags |= CCW_FLAG_CC; 15111da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) prssdp; 15121da177e4SLinus Torvalds 15131da177e4SLinus Torvalds /* Read Subsystem Data - Performance Statistics */ 15141da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 15151da177e4SLinus Torvalds memset(stats, 0, sizeof (struct dasd_rssd_perf_stats_t)); 15161da177e4SLinus Torvalds 15171da177e4SLinus Torvalds ccw++; 15181da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_RSSD; 15191da177e4SLinus Torvalds ccw->count = sizeof (struct dasd_rssd_perf_stats_t); 15201da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) stats; 15211da177e4SLinus Torvalds 15221da177e4SLinus Torvalds cqr->buildclk = get_clock(); 15231da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 15241da177e4SLinus Torvalds rc = dasd_sleep_on(cqr); 15251da177e4SLinus Torvalds if (rc == 0) { 15261da177e4SLinus Torvalds /* Prepare for Read Subsystem Data */ 15271da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 15281da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 15291107ccfbSChristoph Hellwig if (copy_to_user(argp, stats, 15301107ccfbSChristoph Hellwig sizeof(struct dasd_rssd_perf_stats_t))) 15311107ccfbSChristoph Hellwig rc = -EFAULT; 15321da177e4SLinus Torvalds } 15331da177e4SLinus Torvalds dasd_sfree_request(cqr, cqr->device); 15341da177e4SLinus Torvalds return rc; 15351da177e4SLinus Torvalds } 15361da177e4SLinus Torvalds 15371da177e4SLinus Torvalds /* 15381da177e4SLinus Torvalds * Get attributes (cache operations) 15391da177e4SLinus Torvalds * Returnes the cache attributes used in Define Extend (DE). 15401da177e4SLinus Torvalds */ 15411da177e4SLinus Torvalds static int 15421107ccfbSChristoph Hellwig dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 15431da177e4SLinus Torvalds { 15441107ccfbSChristoph Hellwig struct dasd_eckd_private *private = 15451107ccfbSChristoph Hellwig (struct dasd_eckd_private *)device->private; 15461107ccfbSChristoph Hellwig struct attrib_data_t attrib = private->attrib; 15471da177e4SLinus Torvalds int rc; 15481da177e4SLinus Torvalds 15491da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 15501da177e4SLinus Torvalds return -EACCES; 15511107ccfbSChristoph Hellwig if (!argp) 15521da177e4SLinus Torvalds return -EINVAL; 15531da177e4SLinus Torvalds 15541107ccfbSChristoph Hellwig rc = 0; 15551107ccfbSChristoph Hellwig if (copy_to_user(argp, (long *) &attrib, 15561107ccfbSChristoph Hellwig sizeof (struct attrib_data_t))) 15571107ccfbSChristoph Hellwig rc = -EFAULT; 15581da177e4SLinus Torvalds 15591da177e4SLinus Torvalds return rc; 15601da177e4SLinus Torvalds } 15611da177e4SLinus Torvalds 15621da177e4SLinus Torvalds /* 15631da177e4SLinus Torvalds * Set attributes (cache operations) 15641da177e4SLinus Torvalds * Stores the attributes for cache operation to be used in Define Extend (DE). 15651da177e4SLinus Torvalds */ 15661da177e4SLinus Torvalds static int 15671107ccfbSChristoph Hellwig dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 15681da177e4SLinus Torvalds { 15691107ccfbSChristoph Hellwig struct dasd_eckd_private *private = 15701107ccfbSChristoph Hellwig (struct dasd_eckd_private *)device->private; 15711da177e4SLinus Torvalds struct attrib_data_t attrib; 15721da177e4SLinus Torvalds 15731da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 15741da177e4SLinus Torvalds return -EACCES; 15751107ccfbSChristoph Hellwig if (!argp) 15761da177e4SLinus Torvalds return -EINVAL; 15771da177e4SLinus Torvalds 15781107ccfbSChristoph Hellwig if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 15791da177e4SLinus Torvalds return -EFAULT; 15801da177e4SLinus Torvalds private->attrib = attrib; 15811da177e4SLinus Torvalds 15821da177e4SLinus Torvalds DEV_MESSAGE(KERN_INFO, device, 15831da177e4SLinus Torvalds "cache operation mode set to %x (%i cylinder prestage)", 15841da177e4SLinus Torvalds private->attrib.operation, private->attrib.nr_cyl); 15851da177e4SLinus Torvalds return 0; 15861da177e4SLinus Torvalds } 15871da177e4SLinus Torvalds 15881107ccfbSChristoph Hellwig static int 15891107ccfbSChristoph Hellwig dasd_eckd_ioctl(struct dasd_device *device, unsigned int cmd, void __user *argp) 15901107ccfbSChristoph Hellwig { 15911107ccfbSChristoph Hellwig switch (cmd) { 15921107ccfbSChristoph Hellwig case BIODASDGATTR: 15931107ccfbSChristoph Hellwig return dasd_eckd_get_attrib(device, argp); 15941107ccfbSChristoph Hellwig case BIODASDSATTR: 15951107ccfbSChristoph Hellwig return dasd_eckd_set_attrib(device, argp); 15961107ccfbSChristoph Hellwig case BIODASDPSRD: 15971107ccfbSChristoph Hellwig return dasd_eckd_performance(device, argp); 15981107ccfbSChristoph Hellwig case BIODASDRLSE: 15991107ccfbSChristoph Hellwig return dasd_eckd_release(device); 16001107ccfbSChristoph Hellwig case BIODASDRSRV: 16011107ccfbSChristoph Hellwig return dasd_eckd_reserve(device); 16021107ccfbSChristoph Hellwig case BIODASDSLCK: 16031107ccfbSChristoph Hellwig return dasd_eckd_steal_lock(device); 16041107ccfbSChristoph Hellwig default: 16051107ccfbSChristoph Hellwig return -ENOIOCTLCMD; 16061107ccfbSChristoph Hellwig } 16071107ccfbSChristoph Hellwig } 16081107ccfbSChristoph Hellwig 16091da177e4SLinus Torvalds /* 1610445b5b49SHorst Hummel * Dump the range of CCWs into 'page' buffer 1611445b5b49SHorst Hummel * and return number of printed chars. 1612445b5b49SHorst Hummel */ 1613445b5b49SHorst Hummel static inline int 1614445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 1615445b5b49SHorst Hummel { 1616445b5b49SHorst Hummel int len, count; 1617445b5b49SHorst Hummel char *datap; 1618445b5b49SHorst Hummel 1619445b5b49SHorst Hummel len = 0; 1620445b5b49SHorst Hummel while (from <= to) { 1621445b5b49SHorst Hummel len += sprintf(page + len, KERN_ERR PRINTK_HEADER 1622445b5b49SHorst Hummel " CCW %p: %08X %08X DAT:", 1623445b5b49SHorst Hummel from, ((int *) from)[0], ((int *) from)[1]); 1624445b5b49SHorst Hummel 1625445b5b49SHorst Hummel /* get pointer to data (consider IDALs) */ 1626445b5b49SHorst Hummel if (from->flags & CCW_FLAG_IDA) 1627445b5b49SHorst Hummel datap = (char *) *((addr_t *) (addr_t) from->cda); 1628445b5b49SHorst Hummel else 1629445b5b49SHorst Hummel datap = (char *) ((addr_t) from->cda); 1630445b5b49SHorst Hummel 1631445b5b49SHorst Hummel /* dump data (max 32 bytes) */ 1632445b5b49SHorst Hummel for (count = 0; count < from->count && count < 32; count++) { 1633445b5b49SHorst Hummel if (count % 8 == 0) len += sprintf(page + len, " "); 1634445b5b49SHorst Hummel if (count % 4 == 0) len += sprintf(page + len, " "); 1635445b5b49SHorst Hummel len += sprintf(page + len, "%02x", datap[count]); 1636445b5b49SHorst Hummel } 1637445b5b49SHorst Hummel len += sprintf(page + len, "\n"); 1638445b5b49SHorst Hummel from++; 1639445b5b49SHorst Hummel } 1640445b5b49SHorst Hummel return len; 1641445b5b49SHorst Hummel } 1642445b5b49SHorst Hummel 1643445b5b49SHorst Hummel /* 16441da177e4SLinus Torvalds * Print sense data and related channel program. 16451da177e4SLinus Torvalds * Parts are printed because printk buffer is only 1024 bytes. 16461da177e4SLinus Torvalds */ 16471da177e4SLinus Torvalds static void 16481da177e4SLinus Torvalds dasd_eckd_dump_sense(struct dasd_device *device, struct dasd_ccw_req * req, 16491da177e4SLinus Torvalds struct irb *irb) 16501da177e4SLinus Torvalds { 16511da177e4SLinus Torvalds char *page; 1652445b5b49SHorst Hummel struct ccw1 *first, *last, *fail, *from, *to; 1653445b5b49SHorst Hummel int len, sl, sct; 16541da177e4SLinus Torvalds 16551da177e4SLinus Torvalds page = (char *) get_zeroed_page(GFP_ATOMIC); 16561da177e4SLinus Torvalds if (page == NULL) { 16571da177e4SLinus Torvalds DEV_MESSAGE(KERN_ERR, device, " %s", 16581da177e4SLinus Torvalds "No memory to dump sense data"); 16591da177e4SLinus Torvalds return; 16601da177e4SLinus Torvalds } 1661445b5b49SHorst Hummel /* dump the sense data */ 16621da177e4SLinus Torvalds len = sprintf(page, KERN_ERR PRINTK_HEADER 16631da177e4SLinus Torvalds " I/O status report for device %s:\n", 16641da177e4SLinus Torvalds device->cdev->dev.bus_id); 16651da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 16661da177e4SLinus Torvalds " in req: %p CS: 0x%02X DS: 0x%02X\n", req, 16671da177e4SLinus Torvalds irb->scsw.cstat, irb->scsw.dstat); 16681da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 16691da177e4SLinus Torvalds " device %s: Failing CCW: %p\n", 16701da177e4SLinus Torvalds device->cdev->dev.bus_id, 16711da177e4SLinus Torvalds (void *) (addr_t) irb->scsw.cpa); 16721da177e4SLinus Torvalds if (irb->esw.esw0.erw.cons) { 16731da177e4SLinus Torvalds for (sl = 0; sl < 4; sl++) { 16741da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 16751da177e4SLinus Torvalds " Sense(hex) %2d-%2d:", 16761da177e4SLinus Torvalds (8 * sl), ((8 * sl) + 7)); 16771da177e4SLinus Torvalds 16781da177e4SLinus Torvalds for (sct = 0; sct < 8; sct++) { 16791da177e4SLinus Torvalds len += sprintf(page + len, " %02x", 16801da177e4SLinus Torvalds irb->ecw[8 * sl + sct]); 16811da177e4SLinus Torvalds } 16821da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 16831da177e4SLinus Torvalds } 16841da177e4SLinus Torvalds 16851da177e4SLinus Torvalds if (irb->ecw[27] & DASD_SENSE_BIT_0) { 16861da177e4SLinus Torvalds /* 24 Byte Sense Data */ 1687445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 16881da177e4SLinus Torvalds " 24 Byte: %x MSG %x, " 16891da177e4SLinus Torvalds "%s MSGb to SYSOP\n", 16901da177e4SLinus Torvalds irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 16911da177e4SLinus Torvalds irb->ecw[1] & 0x10 ? "" : "no"); 16921da177e4SLinus Torvalds } else { 16931da177e4SLinus Torvalds /* 32 Byte Sense Data */ 1694445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 16951da177e4SLinus Torvalds " 32 Byte: Format: %x " 16961da177e4SLinus Torvalds "Exception class %x\n", 16971da177e4SLinus Torvalds irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 16981da177e4SLinus Torvalds } 16991da177e4SLinus Torvalds } else { 1700445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 17011da177e4SLinus Torvalds " SORRY - NO VALID SENSE AVAILABLE\n"); 17021da177e4SLinus Torvalds } 1703445b5b49SHorst Hummel printk("%s", page); 17041da177e4SLinus Torvalds 1705445b5b49SHorst Hummel /* dump the Channel Program (max 140 Bytes per line) */ 1706445b5b49SHorst Hummel /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 1707445b5b49SHorst Hummel first = req->cpaddr; 1708445b5b49SHorst Hummel for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 1709445b5b49SHorst Hummel to = min(first + 6, last); 17101da177e4SLinus Torvalds len = sprintf(page, KERN_ERR PRINTK_HEADER 17111da177e4SLinus Torvalds " Related CP in req: %p\n", req); 1712445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(first, to, page + len); 1713445b5b49SHorst Hummel printk("%s", page); 17141da177e4SLinus Torvalds 1715445b5b49SHorst Hummel /* print failing CCW area (maximum 4) */ 1716445b5b49SHorst Hummel /* scsw->cda is either valid or zero */ 17171da177e4SLinus Torvalds len = 0; 1718445b5b49SHorst Hummel from = ++to; 1719445b5b49SHorst Hummel fail = (struct ccw1 *)(addr_t) irb->scsw.cpa; /* failing CCW */ 1720445b5b49SHorst Hummel if (from < fail - 2) { 1721445b5b49SHorst Hummel from = fail - 2; /* there is a gap - print header */ 1722445b5b49SHorst Hummel len += sprintf(page, KERN_ERR PRINTK_HEADER "......\n"); 17231da177e4SLinus Torvalds } 1724445b5b49SHorst Hummel to = min(fail + 1, last); 1725445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, to, page + len); 17261da177e4SLinus Torvalds 1727445b5b49SHorst Hummel /* print last CCWs (maximum 2) */ 1728445b5b49SHorst Hummel from = max(from, ++to); 1729445b5b49SHorst Hummel if (from < last - 1) { 1730445b5b49SHorst Hummel from = last - 1; /* there is a gap - print header */ 17311da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n"); 17321da177e4SLinus Torvalds } 1733445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, last, page + len); 17341da177e4SLinus Torvalds if (len > 0) 1735445b5b49SHorst Hummel printk("%s", page); 17361da177e4SLinus Torvalds free_page((unsigned long) page); 17371da177e4SLinus Torvalds } 17381da177e4SLinus Torvalds 17391da177e4SLinus Torvalds /* 17401da177e4SLinus Torvalds * max_blocks is dependent on the amount of storage that is available 17411da177e4SLinus Torvalds * in the static io buffer for each device. Currently each device has 17421da177e4SLinus Torvalds * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has 17431da177e4SLinus Torvalds * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use 17441da177e4SLinus Torvalds * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In 17451da177e4SLinus Torvalds * addition we have one define extent ccw + 16 bytes of data and one 17461da177e4SLinus Torvalds * locate record ccw + 16 bytes of data. That makes: 17471da177e4SLinus Torvalds * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. 17481da177e4SLinus Torvalds * We want to fit two into the available memory so that we can immediately 17491da177e4SLinus Torvalds * start the next request if one finishes off. That makes 249.5 blocks 17501da177e4SLinus Torvalds * for one request. Give a little safety and the result is 240. 17511da177e4SLinus Torvalds */ 17521da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline = { 17531da177e4SLinus Torvalds .owner = THIS_MODULE, 17541da177e4SLinus Torvalds .name = "ECKD", 17551da177e4SLinus Torvalds .ebcname = "ECKD", 17561da177e4SLinus Torvalds .max_blocks = 240, 17571da177e4SLinus Torvalds .check_device = dasd_eckd_check_characteristics, 17581da177e4SLinus Torvalds .do_analysis = dasd_eckd_do_analysis, 17591da177e4SLinus Torvalds .fill_geometry = dasd_eckd_fill_geometry, 17601da177e4SLinus Torvalds .start_IO = dasd_start_IO, 17611da177e4SLinus Torvalds .term_IO = dasd_term_IO, 17621da177e4SLinus Torvalds .format_device = dasd_eckd_format_device, 17631da177e4SLinus Torvalds .examine_error = dasd_eckd_examine_error, 17641da177e4SLinus Torvalds .erp_action = dasd_eckd_erp_action, 17651da177e4SLinus Torvalds .erp_postaction = dasd_eckd_erp_postaction, 17661da177e4SLinus Torvalds .build_cp = dasd_eckd_build_cp, 17671da177e4SLinus Torvalds .free_cp = dasd_eckd_free_cp, 17681da177e4SLinus Torvalds .dump_sense = dasd_eckd_dump_sense, 17691da177e4SLinus Torvalds .fill_info = dasd_eckd_fill_info, 17701107ccfbSChristoph Hellwig .ioctl = dasd_eckd_ioctl, 17711da177e4SLinus Torvalds }; 17721da177e4SLinus Torvalds 17731da177e4SLinus Torvalds static int __init 17741da177e4SLinus Torvalds dasd_eckd_init(void) 17751da177e4SLinus Torvalds { 17761da177e4SLinus Torvalds ASCEBC(dasd_eckd_discipline.ebcname, 4); 177740545573SHorst Hummel return ccw_driver_register(&dasd_eckd_driver); 17781da177e4SLinus Torvalds } 17791da177e4SLinus Torvalds 17801da177e4SLinus Torvalds static void __exit 17811da177e4SLinus Torvalds dasd_eckd_cleanup(void) 17821da177e4SLinus Torvalds { 17831da177e4SLinus Torvalds ccw_driver_unregister(&dasd_eckd_driver); 17841da177e4SLinus Torvalds } 17851da177e4SLinus Torvalds 17861da177e4SLinus Torvalds module_init(dasd_eckd_init); 17871da177e4SLinus Torvalds module_exit(dasd_eckd_cleanup); 1788