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 * $Revision: 1.69 $ 111da177e4SLinus Torvalds */ 121da177e4SLinus Torvalds 131da177e4SLinus Torvalds #include <linux/config.h> 141da177e4SLinus Torvalds #include <linux/stddef.h> 151da177e4SLinus Torvalds #include <linux/kernel.h> 161da177e4SLinus Torvalds #include <linux/slab.h> 171da177e4SLinus Torvalds #include <linux/hdreg.h> /* HDIO_GETGEO */ 181da177e4SLinus Torvalds #include <linux/bio.h> 191da177e4SLinus Torvalds #include <linux/module.h> 201da177e4SLinus Torvalds #include <linux/init.h> 211da177e4SLinus Torvalds 221da177e4SLinus Torvalds #include <asm/debug.h> 231da177e4SLinus Torvalds #include <asm/idals.h> 241da177e4SLinus Torvalds #include <asm/ebcdic.h> 251da177e4SLinus Torvalds #include <asm/io.h> 261da177e4SLinus Torvalds #include <asm/todclk.h> 271da177e4SLinus Torvalds #include <asm/uaccess.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 931da177e4SLinus Torvalds ret = dasd_generic_probe (cdev, &dasd_eckd_discipline); 941da177e4SLinus Torvalds if (ret) 951da177e4SLinus Torvalds return ret; 961da177e4SLinus Torvalds ccw_device_set_options(cdev, CCWDEV_DO_PATHGROUP | CCWDEV_ALLOW_FORCE); 971da177e4SLinus Torvalds return 0; 981da177e4SLinus Torvalds } 991da177e4SLinus Torvalds 1001da177e4SLinus Torvalds static int 1011da177e4SLinus Torvalds dasd_eckd_set_online(struct ccw_device *cdev) 1021da177e4SLinus Torvalds { 1031da177e4SLinus Torvalds return dasd_generic_set_online (cdev, &dasd_eckd_discipline); 1041da177e4SLinus Torvalds } 1051da177e4SLinus Torvalds 1061da177e4SLinus Torvalds static struct ccw_driver dasd_eckd_driver = { 1071da177e4SLinus Torvalds .name = "dasd-eckd", 1081da177e4SLinus Torvalds .owner = THIS_MODULE, 1091da177e4SLinus Torvalds .ids = dasd_eckd_ids, 1101da177e4SLinus Torvalds .probe = dasd_eckd_probe, 1111da177e4SLinus Torvalds .remove = dasd_generic_remove, 1121da177e4SLinus Torvalds .set_offline = dasd_generic_set_offline, 1131da177e4SLinus Torvalds .set_online = dasd_eckd_set_online, 1141da177e4SLinus Torvalds .notify = dasd_generic_notify, 1151da177e4SLinus Torvalds }; 1161da177e4SLinus Torvalds 1171da177e4SLinus Torvalds static const int sizes_trk0[] = { 28, 148, 84 }; 1181da177e4SLinus Torvalds #define LABEL_SIZE 140 1191da177e4SLinus Torvalds 1201da177e4SLinus Torvalds static inline unsigned int 1211da177e4SLinus Torvalds round_up_multiple(unsigned int no, unsigned int mult) 1221da177e4SLinus Torvalds { 1231da177e4SLinus Torvalds int rem = no % mult; 1241da177e4SLinus Torvalds return (rem ? no - rem + mult : no); 1251da177e4SLinus Torvalds } 1261da177e4SLinus Torvalds 1271da177e4SLinus Torvalds static inline unsigned int 1281da177e4SLinus Torvalds ceil_quot(unsigned int d1, unsigned int d2) 1291da177e4SLinus Torvalds { 1301da177e4SLinus Torvalds return (d1 + (d2 - 1)) / d2; 1311da177e4SLinus Torvalds } 1321da177e4SLinus Torvalds 1331da177e4SLinus Torvalds static inline int 1341da177e4SLinus Torvalds bytes_per_record(struct dasd_eckd_characteristics *rdc, int kl, int dl) 1351da177e4SLinus Torvalds { 1361da177e4SLinus Torvalds unsigned int fl1, fl2, int1, int2; 1371da177e4SLinus Torvalds int bpr; 1381da177e4SLinus Torvalds 1391da177e4SLinus Torvalds switch (rdc->formula) { 1401da177e4SLinus Torvalds case 0x01: 1411da177e4SLinus Torvalds fl1 = round_up_multiple(ECKD_F2(rdc) + dl, ECKD_F1(rdc)); 1421da177e4SLinus Torvalds fl2 = round_up_multiple(kl ? ECKD_F2(rdc) + kl : 0, 1431da177e4SLinus Torvalds ECKD_F1(rdc)); 1441da177e4SLinus Torvalds bpr = fl1 + fl2; 1451da177e4SLinus Torvalds break; 1461da177e4SLinus Torvalds case 0x02: 1471da177e4SLinus Torvalds int1 = ceil_quot(dl + ECKD_F6(rdc), ECKD_F5(rdc) << 1); 1481da177e4SLinus Torvalds int2 = ceil_quot(kl + ECKD_F6(rdc), ECKD_F5(rdc) << 1); 1491da177e4SLinus Torvalds fl1 = round_up_multiple(ECKD_F1(rdc) * ECKD_F2(rdc) + dl + 1501da177e4SLinus Torvalds ECKD_F6(rdc) + ECKD_F4(rdc) * int1, 1511da177e4SLinus Torvalds ECKD_F1(rdc)); 1521da177e4SLinus Torvalds fl2 = round_up_multiple(ECKD_F1(rdc) * ECKD_F3(rdc) + kl + 1531da177e4SLinus Torvalds ECKD_F6(rdc) + ECKD_F4(rdc) * int2, 1541da177e4SLinus Torvalds ECKD_F1(rdc)); 1551da177e4SLinus Torvalds bpr = fl1 + fl2; 1561da177e4SLinus Torvalds break; 1571da177e4SLinus Torvalds default: 1581da177e4SLinus Torvalds bpr = 0; 1591da177e4SLinus Torvalds break; 1601da177e4SLinus Torvalds } 1611da177e4SLinus Torvalds return bpr; 1621da177e4SLinus Torvalds } 1631da177e4SLinus Torvalds 1641da177e4SLinus Torvalds static inline unsigned int 1651da177e4SLinus Torvalds bytes_per_track(struct dasd_eckd_characteristics *rdc) 1661da177e4SLinus Torvalds { 1671da177e4SLinus Torvalds return *(unsigned int *) (rdc->byte_per_track) >> 8; 1681da177e4SLinus Torvalds } 1691da177e4SLinus Torvalds 1701da177e4SLinus Torvalds static inline unsigned int 1711da177e4SLinus Torvalds recs_per_track(struct dasd_eckd_characteristics * rdc, 1721da177e4SLinus Torvalds unsigned int kl, unsigned int dl) 1731da177e4SLinus Torvalds { 1741da177e4SLinus Torvalds int dn, kn; 1751da177e4SLinus Torvalds 1761da177e4SLinus Torvalds switch (rdc->dev_type) { 1771da177e4SLinus Torvalds case 0x3380: 1781da177e4SLinus Torvalds if (kl) 1791da177e4SLinus Torvalds return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + 1801da177e4SLinus Torvalds ceil_quot(dl + 12, 32)); 1811da177e4SLinus Torvalds else 1821da177e4SLinus Torvalds return 1499 / (15 + ceil_quot(dl + 12, 32)); 1831da177e4SLinus Torvalds case 0x3390: 1841da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1851da177e4SLinus Torvalds if (kl) { 1861da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1871da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + 1881da177e4SLinus Torvalds 9 + ceil_quot(dl + 6 * dn, 34)); 1891da177e4SLinus Torvalds } else 1901da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); 1911da177e4SLinus Torvalds case 0x9345: 1921da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1931da177e4SLinus Torvalds if (kl) { 1941da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1951da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + 1961da177e4SLinus Torvalds ceil_quot(dl + 6 * dn, 34)); 1971da177e4SLinus Torvalds } else 1981da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); 1991da177e4SLinus Torvalds } 2001da177e4SLinus Torvalds return 0; 2011da177e4SLinus Torvalds } 2021da177e4SLinus Torvalds 2031da177e4SLinus Torvalds static inline void 2041da177e4SLinus Torvalds check_XRC (struct ccw1 *de_ccw, 2051da177e4SLinus Torvalds struct DE_eckd_data *data, 2061da177e4SLinus Torvalds struct dasd_device *device) 2071da177e4SLinus Torvalds { 2081da177e4SLinus Torvalds struct dasd_eckd_private *private; 2091da177e4SLinus Torvalds 2101da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 2111da177e4SLinus Torvalds 2121da177e4SLinus Torvalds /* switch on System Time Stamp - needed for XRC Support */ 2131da177e4SLinus Torvalds if (private->rdc_data.facilities.XRC_supported) { 2141da177e4SLinus Torvalds 2151da177e4SLinus Torvalds data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ 2161da177e4SLinus Torvalds data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ 2171da177e4SLinus Torvalds 2181da177e4SLinus Torvalds data->ep_sys_time = get_clock (); 2191da177e4SLinus Torvalds 2201da177e4SLinus Torvalds de_ccw->count = sizeof (struct DE_eckd_data); 2211da177e4SLinus Torvalds de_ccw->flags |= CCW_FLAG_SLI; 2221da177e4SLinus Torvalds } 2231da177e4SLinus Torvalds 2241da177e4SLinus Torvalds return; 2251da177e4SLinus Torvalds 2261da177e4SLinus Torvalds } /* end check_XRC */ 2271da177e4SLinus Torvalds 2281da177e4SLinus Torvalds static inline void 2291da177e4SLinus Torvalds define_extent(struct ccw1 * ccw, struct DE_eckd_data * data, int trk, 2301da177e4SLinus Torvalds int totrk, int cmd, struct dasd_device * device) 2311da177e4SLinus Torvalds { 2321da177e4SLinus Torvalds struct dasd_eckd_private *private; 2331da177e4SLinus Torvalds struct ch_t geo, beg, end; 2341da177e4SLinus Torvalds 2351da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 2361da177e4SLinus Torvalds 2371da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; 2381da177e4SLinus Torvalds ccw->flags = 0; 2391da177e4SLinus Torvalds ccw->count = 16; 2401da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 2411da177e4SLinus Torvalds 2421da177e4SLinus Torvalds memset(data, 0, sizeof (struct DE_eckd_data)); 2431da177e4SLinus Torvalds switch (cmd) { 2441da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 2451da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 2461da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 2471da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 2481da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 2491da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 2501da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 2511da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 2521da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_COUNT: 2531da177e4SLinus Torvalds data->mask.perm = 0x1; 2541da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 2551da177e4SLinus Torvalds break; 2561da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 2571da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 2581da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 2591da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 2601da177e4SLinus Torvalds data->mask.perm = 0x02; 2611da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 2621da177e4SLinus Torvalds check_XRC (ccw, data, device); 2631da177e4SLinus Torvalds break; 2641da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 2651da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 2661da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 2671da177e4SLinus Torvalds check_XRC (ccw, data, device); 2681da177e4SLinus Torvalds break; 2691da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 2701da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 2711da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 2721da177e4SLinus Torvalds data->mask.perm = 0x3; 2731da177e4SLinus Torvalds data->mask.auth = 0x1; 2741da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 2751da177e4SLinus Torvalds check_XRC (ccw, data, device); 2761da177e4SLinus Torvalds break; 2771da177e4SLinus Torvalds default: 2781da177e4SLinus Torvalds DEV_MESSAGE(KERN_ERR, device, "unknown opcode 0x%x", cmd); 2791da177e4SLinus Torvalds break; 2801da177e4SLinus Torvalds } 2811da177e4SLinus Torvalds 2821da177e4SLinus Torvalds data->attributes.mode = 0x3; /* ECKD */ 2831da177e4SLinus Torvalds 2841da177e4SLinus Torvalds if ((private->rdc_data.cu_type == 0x2105 || 2851da177e4SLinus Torvalds private->rdc_data.cu_type == 0x2107 || 2861da177e4SLinus Torvalds private->rdc_data.cu_type == 0x1750) 2871da177e4SLinus Torvalds && !(private->uses_cdl && trk < 2)) 2881da177e4SLinus Torvalds data->ga_extended |= 0x40; /* Regular Data Format Mode */ 2891da177e4SLinus Torvalds 2901da177e4SLinus Torvalds geo.cyl = private->rdc_data.no_cyl; 2911da177e4SLinus Torvalds geo.head = private->rdc_data.trk_per_cyl; 2921da177e4SLinus Torvalds beg.cyl = trk / geo.head; 2931da177e4SLinus Torvalds beg.head = trk % geo.head; 2941da177e4SLinus Torvalds end.cyl = totrk / geo.head; 2951da177e4SLinus Torvalds end.head = totrk % geo.head; 2961da177e4SLinus Torvalds 2971da177e4SLinus Torvalds /* check for sequential prestage - enhance cylinder range */ 2981da177e4SLinus Torvalds if (data->attributes.operation == DASD_SEQ_PRESTAGE || 2991da177e4SLinus Torvalds data->attributes.operation == DASD_SEQ_ACCESS) { 3001da177e4SLinus Torvalds 3011da177e4SLinus Torvalds if (end.cyl + private->attrib.nr_cyl < geo.cyl) 3021da177e4SLinus Torvalds end.cyl += private->attrib.nr_cyl; 3031da177e4SLinus Torvalds else 3041da177e4SLinus Torvalds end.cyl = (geo.cyl - 1); 3051da177e4SLinus Torvalds } 3061da177e4SLinus Torvalds 3071da177e4SLinus Torvalds data->beg_ext.cyl = beg.cyl; 3081da177e4SLinus Torvalds data->beg_ext.head = beg.head; 3091da177e4SLinus Torvalds data->end_ext.cyl = end.cyl; 3101da177e4SLinus Torvalds data->end_ext.head = end.head; 3111da177e4SLinus Torvalds } 3121da177e4SLinus Torvalds 3131da177e4SLinus Torvalds static inline void 3141da177e4SLinus Torvalds locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, int trk, 3151da177e4SLinus Torvalds int rec_on_trk, int no_rec, int cmd, 3161da177e4SLinus Torvalds struct dasd_device * device, int reclen) 3171da177e4SLinus Torvalds { 3181da177e4SLinus Torvalds struct dasd_eckd_private *private; 3191da177e4SLinus Torvalds int sector; 3201da177e4SLinus Torvalds int dn, d; 3211da177e4SLinus Torvalds 3221da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 3231da177e4SLinus Torvalds 3241da177e4SLinus Torvalds DBF_DEV_EVENT(DBF_INFO, device, 3251da177e4SLinus Torvalds "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", 3261da177e4SLinus Torvalds trk, rec_on_trk, no_rec, cmd, reclen); 3271da177e4SLinus Torvalds 3281da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; 3291da177e4SLinus Torvalds ccw->flags = 0; 3301da177e4SLinus Torvalds ccw->count = 16; 3311da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 3321da177e4SLinus Torvalds 3331da177e4SLinus Torvalds memset(data, 0, sizeof (struct LO_eckd_data)); 3341da177e4SLinus Torvalds sector = 0; 3351da177e4SLinus Torvalds if (rec_on_trk) { 3361da177e4SLinus Torvalds switch (private->rdc_data.dev_type) { 3371da177e4SLinus Torvalds case 0x3390: 3381da177e4SLinus Torvalds dn = ceil_quot(reclen + 6, 232); 3391da177e4SLinus Torvalds d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 3401da177e4SLinus Torvalds sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 3411da177e4SLinus Torvalds break; 3421da177e4SLinus Torvalds case 0x3380: 3431da177e4SLinus Torvalds d = 7 + ceil_quot(reclen + 12, 32); 3441da177e4SLinus Torvalds sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 3451da177e4SLinus Torvalds break; 3461da177e4SLinus Torvalds } 3471da177e4SLinus Torvalds } 3481da177e4SLinus Torvalds data->sector = sector; 3491da177e4SLinus Torvalds data->count = no_rec; 3501da177e4SLinus Torvalds switch (cmd) { 3511da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 3521da177e4SLinus Torvalds data->operation.orientation = 0x3; 3531da177e4SLinus Torvalds data->operation.operation = 0x03; 3541da177e4SLinus Torvalds break; 3551da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 3561da177e4SLinus Torvalds data->operation.orientation = 0x3; 3571da177e4SLinus Torvalds data->operation.operation = 0x16; 3581da177e4SLinus Torvalds break; 3591da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 3601da177e4SLinus Torvalds data->operation.orientation = 0x1; 3611da177e4SLinus Torvalds data->operation.operation = 0x03; 3621da177e4SLinus Torvalds data->count++; 3631da177e4SLinus Torvalds break; 3641da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 3651da177e4SLinus Torvalds data->operation.orientation = 0x3; 3661da177e4SLinus Torvalds data->operation.operation = 0x16; 3671da177e4SLinus Torvalds data->count++; 3681da177e4SLinus Torvalds break; 3691da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 3701da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 3711da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 3721da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 3731da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 3741da177e4SLinus Torvalds data->length = reclen; 3751da177e4SLinus Torvalds data->operation.operation = 0x01; 3761da177e4SLinus Torvalds break; 3771da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 3781da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 3791da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 3801da177e4SLinus Torvalds data->length = reclen; 3811da177e4SLinus Torvalds data->operation.operation = 0x03; 3821da177e4SLinus Torvalds break; 3831da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 3841da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 3851da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 3861da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 3871da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 3881da177e4SLinus Torvalds data->length = reclen; 3891da177e4SLinus Torvalds data->operation.operation = 0x06; 3901da177e4SLinus Torvalds break; 3911da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 3921da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 3931da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 3941da177e4SLinus Torvalds data->length = reclen; 3951da177e4SLinus Torvalds data->operation.operation = 0x16; 3961da177e4SLinus Torvalds break; 3971da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_COUNT: 3981da177e4SLinus Torvalds data->operation.operation = 0x06; 3991da177e4SLinus Torvalds break; 4001da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 4011da177e4SLinus Torvalds data->length = reclen; 4021da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 4031da177e4SLinus Torvalds data->operation.operation = 0x0b; 4041da177e4SLinus Torvalds break; 4051da177e4SLinus Torvalds default: 4061da177e4SLinus Torvalds DEV_MESSAGE(KERN_ERR, device, "unknown opcode 0x%x", cmd); 4071da177e4SLinus Torvalds } 4081da177e4SLinus Torvalds data->seek_addr.cyl = data->search_arg.cyl = 4091da177e4SLinus Torvalds trk / private->rdc_data.trk_per_cyl; 4101da177e4SLinus Torvalds data->seek_addr.head = data->search_arg.head = 4111da177e4SLinus Torvalds trk % private->rdc_data.trk_per_cyl; 4121da177e4SLinus Torvalds data->search_arg.record = rec_on_trk; 4131da177e4SLinus Torvalds } 4141da177e4SLinus Torvalds 4151da177e4SLinus Torvalds /* 4161da177e4SLinus Torvalds * Returns 1 if the block is one of the special blocks that needs 4171da177e4SLinus Torvalds * to get read/written with the KD variant of the command. 4181da177e4SLinus Torvalds * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and 4191da177e4SLinus Torvalds * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. 4201da177e4SLinus Torvalds * Luckily the KD variants differ only by one bit (0x08) from the 4211da177e4SLinus Torvalds * normal variant. So don't wonder about code like: 4221da177e4SLinus Torvalds * if (dasd_eckd_cdl_special(blk_per_trk, recid)) 4231da177e4SLinus Torvalds * ccw->cmd_code |= 0x8; 4241da177e4SLinus Torvalds */ 4251da177e4SLinus Torvalds static inline int 4261da177e4SLinus Torvalds dasd_eckd_cdl_special(int blk_per_trk, int recid) 4271da177e4SLinus Torvalds { 4281da177e4SLinus Torvalds if (recid < 3) 4291da177e4SLinus Torvalds return 1; 4301da177e4SLinus Torvalds if (recid < blk_per_trk) 4311da177e4SLinus Torvalds return 0; 4321da177e4SLinus Torvalds if (recid < 2 * blk_per_trk) 4331da177e4SLinus Torvalds return 1; 4341da177e4SLinus Torvalds return 0; 4351da177e4SLinus Torvalds } 4361da177e4SLinus Torvalds 4371da177e4SLinus Torvalds /* 4381da177e4SLinus Torvalds * Returns the record size for the special blocks of the cdl format. 4391da177e4SLinus Torvalds * Only returns something useful if dasd_eckd_cdl_special is true 4401da177e4SLinus Torvalds * for the recid. 4411da177e4SLinus Torvalds */ 4421da177e4SLinus Torvalds static inline int 4431da177e4SLinus Torvalds dasd_eckd_cdl_reclen(int recid) 4441da177e4SLinus Torvalds { 4451da177e4SLinus Torvalds if (recid < 3) 4461da177e4SLinus Torvalds return sizes_trk0[recid]; 4471da177e4SLinus Torvalds return LABEL_SIZE; 4481da177e4SLinus Torvalds } 4491da177e4SLinus Torvalds 4501da177e4SLinus Torvalds static int 4511da177e4SLinus Torvalds dasd_eckd_read_conf(struct dasd_device *device) 4521da177e4SLinus Torvalds { 4531da177e4SLinus Torvalds void *conf_data; 4541da177e4SLinus Torvalds int conf_len, conf_data_saved; 4551da177e4SLinus Torvalds int rc; 4561da177e4SLinus Torvalds __u8 lpm; 4571da177e4SLinus Torvalds struct dasd_eckd_private *private; 4581da177e4SLinus Torvalds struct dasd_eckd_path *path_data; 4591da177e4SLinus Torvalds 4601da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 4611da177e4SLinus Torvalds path_data = (struct dasd_eckd_path *) &private->path_data; 4621da177e4SLinus Torvalds path_data->opm = ccw_device_get_path_mask(device->cdev); 4631da177e4SLinus Torvalds lpm = 0x80; 4641da177e4SLinus Torvalds conf_data_saved = 0; 4651da177e4SLinus Torvalds 4661da177e4SLinus Torvalds /* get configuration data per operational path */ 4671da177e4SLinus Torvalds for (lpm = 0x80; lpm; lpm>>= 1) { 4681da177e4SLinus Torvalds if (lpm & path_data->opm){ 4691da177e4SLinus Torvalds rc = read_conf_data_lpm(device->cdev, &conf_data, 4701da177e4SLinus Torvalds &conf_len, lpm); 4711da177e4SLinus Torvalds if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ 4721da177e4SLinus Torvalds MESSAGE(KERN_WARNING, 4731da177e4SLinus Torvalds "Read configuration data returned " 4741da177e4SLinus Torvalds "error %d", rc); 4751da177e4SLinus Torvalds return rc; 4761da177e4SLinus Torvalds } 4771da177e4SLinus Torvalds if (conf_data == NULL) { 4781da177e4SLinus Torvalds MESSAGE(KERN_WARNING, "%s", "No configuration " 4791da177e4SLinus Torvalds "data retrieved"); 4801da177e4SLinus Torvalds continue; /* no errror */ 4811da177e4SLinus Torvalds } 4821da177e4SLinus Torvalds if (conf_len != sizeof (struct dasd_eckd_confdata)) { 4831da177e4SLinus Torvalds MESSAGE(KERN_WARNING, 4841da177e4SLinus Torvalds "sizes of configuration data mismatch" 4851da177e4SLinus Torvalds "%d (read) vs %ld (expected)", 4861da177e4SLinus Torvalds conf_len, 4871da177e4SLinus Torvalds sizeof (struct dasd_eckd_confdata)); 4881da177e4SLinus Torvalds kfree(conf_data); 4891da177e4SLinus Torvalds continue; /* no errror */ 4901da177e4SLinus Torvalds } 4911da177e4SLinus Torvalds /* save first valid configuration data */ 4921da177e4SLinus Torvalds if (!conf_data_saved){ 4931da177e4SLinus Torvalds memcpy(&private->conf_data, conf_data, 4941da177e4SLinus Torvalds sizeof (struct dasd_eckd_confdata)); 4951da177e4SLinus Torvalds conf_data_saved++; 4961da177e4SLinus Torvalds } 4971da177e4SLinus Torvalds switch (((char *)conf_data)[242] & 0x07){ 4981da177e4SLinus Torvalds case 0x02: 4991da177e4SLinus Torvalds path_data->npm |= lpm; 5001da177e4SLinus Torvalds break; 5011da177e4SLinus Torvalds case 0x03: 5021da177e4SLinus Torvalds path_data->ppm |= lpm; 5031da177e4SLinus Torvalds break; 5041da177e4SLinus Torvalds } 5051da177e4SLinus Torvalds kfree(conf_data); 5061da177e4SLinus Torvalds } 5071da177e4SLinus Torvalds } 5081da177e4SLinus Torvalds return 0; 5091da177e4SLinus Torvalds } 5101da177e4SLinus Torvalds 5111da177e4SLinus Torvalds 5121da177e4SLinus Torvalds static int 5131da177e4SLinus Torvalds dasd_eckd_check_characteristics(struct dasd_device *device) 5141da177e4SLinus Torvalds { 5151da177e4SLinus Torvalds struct dasd_eckd_private *private; 5161da177e4SLinus Torvalds void *rdc_data; 5171da177e4SLinus Torvalds int rc; 5181da177e4SLinus Torvalds 5191da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 5201da177e4SLinus Torvalds if (private == NULL) { 5211da177e4SLinus Torvalds private = kmalloc(sizeof(struct dasd_eckd_private), 5221da177e4SLinus Torvalds GFP_KERNEL | GFP_DMA); 5231da177e4SLinus Torvalds if (private == NULL) { 5241da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 5251da177e4SLinus Torvalds "memory allocation failed for private " 5261da177e4SLinus Torvalds "data"); 5271da177e4SLinus Torvalds return -ENOMEM; 5281da177e4SLinus Torvalds } 5291da177e4SLinus Torvalds memset(private, 0, sizeof(struct dasd_eckd_private)); 5301da177e4SLinus Torvalds device->private = (void *) private; 5311da177e4SLinus Torvalds } 5321da177e4SLinus Torvalds /* Invalidate status of initial analysis. */ 5331da177e4SLinus Torvalds private->init_cqr_status = -1; 5341da177e4SLinus Torvalds /* Set default cache operations. */ 5351da177e4SLinus Torvalds private->attrib.operation = DASD_NORMAL_CACHE; 5361da177e4SLinus Torvalds private->attrib.nr_cyl = 0; 5371da177e4SLinus Torvalds 5381da177e4SLinus Torvalds /* Read Device Characteristics */ 5391da177e4SLinus Torvalds rdc_data = (void *) &(private->rdc_data); 5401da177e4SLinus Torvalds rc = read_dev_chars(device->cdev, &rdc_data, 64); 5411da177e4SLinus Torvalds if (rc) { 5421da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, 5431da177e4SLinus Torvalds "Read device characteristics returned error %d", 5441da177e4SLinus Torvalds rc); 5451da177e4SLinus Torvalds return rc; 5461da177e4SLinus Torvalds } 5471da177e4SLinus Torvalds 5481da177e4SLinus Torvalds DEV_MESSAGE(KERN_INFO, device, 5491da177e4SLinus Torvalds "%04X/%02X(CU:%04X/%02X) Cyl:%d Head:%d Sec:%d", 5501da177e4SLinus Torvalds private->rdc_data.dev_type, 5511da177e4SLinus Torvalds private->rdc_data.dev_model, 5521da177e4SLinus Torvalds private->rdc_data.cu_type, 5531da177e4SLinus Torvalds private->rdc_data.cu_model.model, 5541da177e4SLinus Torvalds private->rdc_data.no_cyl, 5551da177e4SLinus Torvalds private->rdc_data.trk_per_cyl, 5561da177e4SLinus Torvalds private->rdc_data.sec_per_trk); 5571da177e4SLinus Torvalds 5581da177e4SLinus Torvalds /* Read Configuration Data */ 5591da177e4SLinus Torvalds rc = dasd_eckd_read_conf (device); 5601da177e4SLinus Torvalds return rc; 5611da177e4SLinus Torvalds 5621da177e4SLinus Torvalds } 5631da177e4SLinus Torvalds 5641da177e4SLinus Torvalds static struct dasd_ccw_req * 5651da177e4SLinus Torvalds dasd_eckd_analysis_ccw(struct dasd_device *device) 5661da177e4SLinus Torvalds { 5671da177e4SLinus Torvalds struct dasd_eckd_private *private; 5681da177e4SLinus Torvalds struct eckd_count *count_data; 5691da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 5701da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 5711da177e4SLinus Torvalds struct ccw1 *ccw; 5721da177e4SLinus Torvalds int cplength, datasize; 5731da177e4SLinus Torvalds int i; 5741da177e4SLinus Torvalds 5751da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 5761da177e4SLinus Torvalds 5771da177e4SLinus Torvalds cplength = 8; 5781da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 5791da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 5801da177e4SLinus Torvalds cplength, datasize, device); 5811da177e4SLinus Torvalds if (IS_ERR(cqr)) 5821da177e4SLinus Torvalds return cqr; 5831da177e4SLinus Torvalds ccw = cqr->cpaddr; 5841da177e4SLinus Torvalds /* Define extent for the first 3 tracks. */ 5851da177e4SLinus Torvalds define_extent(ccw++, cqr->data, 0, 2, 5861da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device); 5871da177e4SLinus Torvalds LO_data = cqr->data + sizeof (struct DE_eckd_data); 5881da177e4SLinus Torvalds /* Locate record for the first 4 records on track 0. */ 5891da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 5901da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 0, 0, 4, 5911da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 5921da177e4SLinus Torvalds 5931da177e4SLinus Torvalds count_data = private->count_area; 5941da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 5951da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 5961da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 5971da177e4SLinus Torvalds ccw->flags = 0; 5981da177e4SLinus Torvalds ccw->count = 8; 5991da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 6001da177e4SLinus Torvalds ccw++; 6011da177e4SLinus Torvalds count_data++; 6021da177e4SLinus Torvalds } 6031da177e4SLinus Torvalds 6041da177e4SLinus Torvalds /* Locate record for the first record on track 2. */ 6051da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 6061da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 2, 0, 1, 6071da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 6081da177e4SLinus Torvalds /* Read count ccw. */ 6091da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 6101da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 6111da177e4SLinus Torvalds ccw->flags = 0; 6121da177e4SLinus Torvalds ccw->count = 8; 6131da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 6141da177e4SLinus Torvalds 6151da177e4SLinus Torvalds cqr->device = device; 6161da177e4SLinus Torvalds cqr->retries = 0; 6171da177e4SLinus Torvalds cqr->buildclk = get_clock(); 6181da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 6191da177e4SLinus Torvalds return cqr; 6201da177e4SLinus Torvalds } 6211da177e4SLinus Torvalds 6221da177e4SLinus Torvalds /* 6231da177e4SLinus Torvalds * This is the callback function for the init_analysis cqr. It saves 6241da177e4SLinus Torvalds * the status of the initial analysis ccw before it frees it and kicks 6251da177e4SLinus Torvalds * the device to continue the startup sequence. This will call 6261da177e4SLinus Torvalds * dasd_eckd_do_analysis again (if the devices has not been marked 6271da177e4SLinus Torvalds * for deletion in the meantime). 6281da177e4SLinus Torvalds */ 6291da177e4SLinus Torvalds static void 6301da177e4SLinus Torvalds dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, void *data) 6311da177e4SLinus Torvalds { 6321da177e4SLinus Torvalds struct dasd_eckd_private *private; 6331da177e4SLinus Torvalds struct dasd_device *device; 6341da177e4SLinus Torvalds 6351da177e4SLinus Torvalds device = init_cqr->device; 6361da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 6371da177e4SLinus Torvalds private->init_cqr_status = init_cqr->status; 6381da177e4SLinus Torvalds dasd_sfree_request(init_cqr, device); 6391da177e4SLinus Torvalds dasd_kick_device(device); 6401da177e4SLinus Torvalds } 6411da177e4SLinus Torvalds 6421da177e4SLinus Torvalds static int 6431da177e4SLinus Torvalds dasd_eckd_start_analysis(struct dasd_device *device) 6441da177e4SLinus Torvalds { 6451da177e4SLinus Torvalds struct dasd_eckd_private *private; 6461da177e4SLinus Torvalds struct dasd_ccw_req *init_cqr; 6471da177e4SLinus Torvalds 6481da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 6491da177e4SLinus Torvalds init_cqr = dasd_eckd_analysis_ccw(device); 6501da177e4SLinus Torvalds if (IS_ERR(init_cqr)) 6511da177e4SLinus Torvalds return PTR_ERR(init_cqr); 6521da177e4SLinus Torvalds init_cqr->callback = dasd_eckd_analysis_callback; 6531da177e4SLinus Torvalds init_cqr->callback_data = NULL; 6541da177e4SLinus Torvalds init_cqr->expires = 5*HZ; 6551da177e4SLinus Torvalds dasd_add_request_head(init_cqr); 6561da177e4SLinus Torvalds return -EAGAIN; 6571da177e4SLinus Torvalds } 6581da177e4SLinus Torvalds 6591da177e4SLinus Torvalds static int 6601da177e4SLinus Torvalds dasd_eckd_end_analysis(struct dasd_device *device) 6611da177e4SLinus Torvalds { 6621da177e4SLinus Torvalds struct dasd_eckd_private *private; 6631da177e4SLinus Torvalds struct eckd_count *count_area; 6641da177e4SLinus Torvalds unsigned int sb, blk_per_trk; 6651da177e4SLinus Torvalds int status, i; 6661da177e4SLinus Torvalds 6671da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 6681da177e4SLinus Torvalds status = private->init_cqr_status; 6691da177e4SLinus Torvalds private->init_cqr_status = -1; 6701da177e4SLinus Torvalds if (status != DASD_CQR_DONE) { 6711da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 6721da177e4SLinus Torvalds "volume analysis returned unformatted disk"); 6731da177e4SLinus Torvalds return -EMEDIUMTYPE; 6741da177e4SLinus Torvalds } 6751da177e4SLinus Torvalds 6761da177e4SLinus Torvalds private->uses_cdl = 1; 6771da177e4SLinus Torvalds /* Calculate number of blocks/records per track. */ 6781da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, device->bp_block); 6791da177e4SLinus Torvalds /* Check Track 0 for Compatible Disk Layout */ 6801da177e4SLinus Torvalds count_area = NULL; 6811da177e4SLinus Torvalds for (i = 0; i < 3; i++) { 6821da177e4SLinus Torvalds if (private->count_area[i].kl != 4 || 6831da177e4SLinus Torvalds private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4) { 6841da177e4SLinus Torvalds private->uses_cdl = 0; 6851da177e4SLinus Torvalds break; 6861da177e4SLinus Torvalds } 6871da177e4SLinus Torvalds } 6881da177e4SLinus Torvalds if (i == 3) 6891da177e4SLinus Torvalds count_area = &private->count_area[4]; 6901da177e4SLinus Torvalds 6911da177e4SLinus Torvalds if (private->uses_cdl == 0) { 6921da177e4SLinus Torvalds for (i = 0; i < 5; i++) { 6931da177e4SLinus Torvalds if ((private->count_area[i].kl != 0) || 6941da177e4SLinus Torvalds (private->count_area[i].dl != 6951da177e4SLinus Torvalds private->count_area[0].dl)) 6961da177e4SLinus Torvalds break; 6971da177e4SLinus Torvalds } 6981da177e4SLinus Torvalds if (i == 5) 6991da177e4SLinus Torvalds count_area = &private->count_area[0]; 7001da177e4SLinus Torvalds } else { 7011da177e4SLinus Torvalds if (private->count_area[3].record == 1) 7021da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 7031da177e4SLinus Torvalds "Trk 0: no records after VTOC!"); 7041da177e4SLinus Torvalds } 7051da177e4SLinus Torvalds if (count_area != NULL && count_area->kl == 0) { 7061da177e4SLinus Torvalds /* we found notthing violating our disk layout */ 7071da177e4SLinus Torvalds if (dasd_check_blocksize(count_area->dl) == 0) 7081da177e4SLinus Torvalds device->bp_block = count_area->dl; 7091da177e4SLinus Torvalds } 7101da177e4SLinus Torvalds if (device->bp_block == 0) { 7111da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 7121da177e4SLinus Torvalds "Volume has incompatible disk layout"); 7131da177e4SLinus Torvalds return -EMEDIUMTYPE; 7141da177e4SLinus Torvalds } 7151da177e4SLinus Torvalds device->s2b_shift = 0; /* bits to shift 512 to get a block */ 7161da177e4SLinus Torvalds for (sb = 512; sb < device->bp_block; sb = sb << 1) 7171da177e4SLinus Torvalds device->s2b_shift++; 7181da177e4SLinus Torvalds 7191da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, device->bp_block); 7201da177e4SLinus Torvalds device->blocks = (private->rdc_data.no_cyl * 7211da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 7221da177e4SLinus Torvalds blk_per_trk); 7231da177e4SLinus Torvalds 7241da177e4SLinus Torvalds DEV_MESSAGE(KERN_INFO, device, 7251da177e4SLinus Torvalds "(%dkB blks): %dkB at %dkB/trk %s", 7261da177e4SLinus Torvalds (device->bp_block >> 10), 7271da177e4SLinus Torvalds ((private->rdc_data.no_cyl * 7281da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 7291da177e4SLinus Torvalds blk_per_trk * (device->bp_block >> 9)) >> 1), 7301da177e4SLinus Torvalds ((blk_per_trk * device->bp_block) >> 10), 7311da177e4SLinus Torvalds private->uses_cdl ? 7321da177e4SLinus Torvalds "compatible disk layout" : "linux disk layout"); 7331da177e4SLinus Torvalds 7341da177e4SLinus Torvalds return 0; 7351da177e4SLinus Torvalds } 7361da177e4SLinus Torvalds 7371da177e4SLinus Torvalds static int 7381da177e4SLinus Torvalds dasd_eckd_do_analysis(struct dasd_device *device) 7391da177e4SLinus Torvalds { 7401da177e4SLinus Torvalds struct dasd_eckd_private *private; 7411da177e4SLinus Torvalds 7421da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 7431da177e4SLinus Torvalds if (private->init_cqr_status < 0) 7441da177e4SLinus Torvalds return dasd_eckd_start_analysis(device); 7451da177e4SLinus Torvalds else 7461da177e4SLinus Torvalds return dasd_eckd_end_analysis(device); 7471da177e4SLinus Torvalds } 7481da177e4SLinus Torvalds 7491da177e4SLinus Torvalds static int 7501da177e4SLinus Torvalds dasd_eckd_fill_geometry(struct dasd_device *device, struct hd_geometry *geo) 7511da177e4SLinus Torvalds { 7521da177e4SLinus Torvalds struct dasd_eckd_private *private; 7531da177e4SLinus Torvalds 7541da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 7551da177e4SLinus Torvalds if (dasd_check_blocksize(device->bp_block) == 0) { 7561da177e4SLinus Torvalds geo->sectors = recs_per_track(&private->rdc_data, 7571da177e4SLinus Torvalds 0, device->bp_block); 7581da177e4SLinus Torvalds } 7591da177e4SLinus Torvalds geo->cylinders = private->rdc_data.no_cyl; 7601da177e4SLinus Torvalds geo->heads = private->rdc_data.trk_per_cyl; 7611da177e4SLinus Torvalds return 0; 7621da177e4SLinus Torvalds } 7631da177e4SLinus Torvalds 7641da177e4SLinus Torvalds static struct dasd_ccw_req * 7651da177e4SLinus Torvalds dasd_eckd_format_device(struct dasd_device * device, 7661da177e4SLinus Torvalds struct format_data_t * fdata) 7671da177e4SLinus Torvalds { 7681da177e4SLinus Torvalds struct dasd_eckd_private *private; 7691da177e4SLinus Torvalds struct dasd_ccw_req *fcp; 7701da177e4SLinus Torvalds struct eckd_count *ect; 7711da177e4SLinus Torvalds struct ccw1 *ccw; 7721da177e4SLinus Torvalds void *data; 7731da177e4SLinus Torvalds int rpt, cyl, head; 7741da177e4SLinus Torvalds int cplength, datasize; 7751da177e4SLinus Torvalds int i; 7761da177e4SLinus Torvalds 7771da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 7781da177e4SLinus Torvalds rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize); 7791da177e4SLinus Torvalds cyl = fdata->start_unit / private->rdc_data.trk_per_cyl; 7801da177e4SLinus Torvalds head = fdata->start_unit % private->rdc_data.trk_per_cyl; 7811da177e4SLinus Torvalds 7821da177e4SLinus Torvalds /* Sanity checks. */ 7831da177e4SLinus Torvalds if (fdata->start_unit >= 7841da177e4SLinus Torvalds (private->rdc_data.no_cyl * private->rdc_data.trk_per_cyl)) { 7851da177e4SLinus Torvalds DEV_MESSAGE(KERN_INFO, device, "Track no %d too big!", 7861da177e4SLinus Torvalds fdata->start_unit); 7871da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 7881da177e4SLinus Torvalds } 7891da177e4SLinus Torvalds if (fdata->start_unit > fdata->stop_unit) { 7901da177e4SLinus Torvalds DEV_MESSAGE(KERN_INFO, device, "Track %d reached! ending.", 7911da177e4SLinus Torvalds fdata->start_unit); 7921da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 7931da177e4SLinus Torvalds } 7941da177e4SLinus Torvalds if (dasd_check_blocksize(fdata->blksize) != 0) { 7951da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, 7961da177e4SLinus Torvalds "Invalid blocksize %d...terminating!", 7971da177e4SLinus Torvalds fdata->blksize); 7981da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 7991da177e4SLinus Torvalds } 8001da177e4SLinus Torvalds 8011da177e4SLinus Torvalds /* 8021da177e4SLinus Torvalds * fdata->intensity is a bit string that tells us what to do: 8031da177e4SLinus Torvalds * Bit 0: write record zero 8041da177e4SLinus Torvalds * Bit 1: write home address, currently not supported 8051da177e4SLinus Torvalds * Bit 2: invalidate tracks 8061da177e4SLinus Torvalds * Bit 3: use OS/390 compatible disk layout (cdl) 8071da177e4SLinus Torvalds * Only some bit combinations do make sense. 8081da177e4SLinus Torvalds */ 8091da177e4SLinus Torvalds switch (fdata->intensity) { 8101da177e4SLinus Torvalds case 0x00: /* Normal format */ 8111da177e4SLinus Torvalds case 0x08: /* Normal format, use cdl. */ 8121da177e4SLinus Torvalds cplength = 2 + rpt; 8131da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 8141da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 8151da177e4SLinus Torvalds rpt * sizeof(struct eckd_count); 8161da177e4SLinus Torvalds break; 8171da177e4SLinus Torvalds case 0x01: /* Write record zero and format track. */ 8181da177e4SLinus Torvalds case 0x09: /* Write record zero and format track, use cdl. */ 8191da177e4SLinus Torvalds cplength = 3 + rpt; 8201da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 8211da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 8221da177e4SLinus Torvalds sizeof(struct eckd_count) + 8231da177e4SLinus Torvalds rpt * sizeof(struct eckd_count); 8241da177e4SLinus Torvalds break; 8251da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 8261da177e4SLinus Torvalds case 0x0c: /* Invalidate track, use cdl. */ 8271da177e4SLinus Torvalds cplength = 3; 8281da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 8291da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 8301da177e4SLinus Torvalds sizeof(struct eckd_count); 8311da177e4SLinus Torvalds break; 8321da177e4SLinus Torvalds default: 8331da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "Invalid flags 0x%x.", 8341da177e4SLinus Torvalds fdata->intensity); 8351da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 8361da177e4SLinus Torvalds } 8371da177e4SLinus Torvalds /* Allocate the format ccw request. */ 8381da177e4SLinus Torvalds fcp = dasd_smalloc_request(dasd_eckd_discipline.name, 8391da177e4SLinus Torvalds cplength, datasize, device); 8401da177e4SLinus Torvalds if (IS_ERR(fcp)) 8411da177e4SLinus Torvalds return fcp; 8421da177e4SLinus Torvalds 8431da177e4SLinus Torvalds data = fcp->data; 8441da177e4SLinus Torvalds ccw = fcp->cpaddr; 8451da177e4SLinus Torvalds 8461da177e4SLinus Torvalds switch (fdata->intensity & ~0x08) { 8471da177e4SLinus Torvalds case 0x00: /* Normal format. */ 8481da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 8491da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 8501da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device); 8511da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 8521da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 8531da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 8541da177e4SLinus Torvalds fdata->start_unit, 0, rpt, 8551da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device, 8561da177e4SLinus Torvalds fdata->blksize); 8571da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 8581da177e4SLinus Torvalds break; 8591da177e4SLinus Torvalds case 0x01: /* Write record zero + format track. */ 8601da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 8611da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 8621da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, 8631da177e4SLinus Torvalds device); 8641da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 8651da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 8661da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 8671da177e4SLinus Torvalds fdata->start_unit, 0, rpt + 1, 8681da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, device, 8691da177e4SLinus Torvalds device->bp_block); 8701da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 8711da177e4SLinus Torvalds break; 8721da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 8731da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 8741da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 8751da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device); 8761da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 8771da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 8781da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 8791da177e4SLinus Torvalds fdata->start_unit, 0, 1, 8801da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device, 8); 8811da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 8821da177e4SLinus Torvalds break; 8831da177e4SLinus Torvalds } 8841da177e4SLinus Torvalds if (fdata->intensity & 0x01) { /* write record zero */ 8851da177e4SLinus Torvalds ect = (struct eckd_count *) data; 8861da177e4SLinus Torvalds data += sizeof(struct eckd_count); 8871da177e4SLinus Torvalds ect->cyl = cyl; 8881da177e4SLinus Torvalds ect->head = head; 8891da177e4SLinus Torvalds ect->record = 0; 8901da177e4SLinus Torvalds ect->kl = 0; 8911da177e4SLinus Torvalds ect->dl = 8; 8921da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 8931da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 8941da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 8951da177e4SLinus Torvalds ccw->count = 8; 8961da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 8971da177e4SLinus Torvalds ccw++; 8981da177e4SLinus Torvalds } 8991da177e4SLinus Torvalds if ((fdata->intensity & ~0x08) & 0x04) { /* erase track */ 9001da177e4SLinus Torvalds ect = (struct eckd_count *) data; 9011da177e4SLinus Torvalds data += sizeof(struct eckd_count); 9021da177e4SLinus Torvalds ect->cyl = cyl; 9031da177e4SLinus Torvalds ect->head = head; 9041da177e4SLinus Torvalds ect->record = 1; 9051da177e4SLinus Torvalds ect->kl = 0; 9061da177e4SLinus Torvalds ect->dl = 0; 9071da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 9081da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 9091da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 9101da177e4SLinus Torvalds ccw->count = 8; 9111da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 9121da177e4SLinus Torvalds } else { /* write remaining records */ 9131da177e4SLinus Torvalds for (i = 0; i < rpt; i++) { 9141da177e4SLinus Torvalds ect = (struct eckd_count *) data; 9151da177e4SLinus Torvalds data += sizeof(struct eckd_count); 9161da177e4SLinus Torvalds ect->cyl = cyl; 9171da177e4SLinus Torvalds ect->head = head; 9181da177e4SLinus Torvalds ect->record = i + 1; 9191da177e4SLinus Torvalds ect->kl = 0; 9201da177e4SLinus Torvalds ect->dl = fdata->blksize; 9211da177e4SLinus Torvalds /* Check for special tracks 0-1 when formatting CDL */ 9221da177e4SLinus Torvalds if ((fdata->intensity & 0x08) && 9231da177e4SLinus Torvalds fdata->start_unit == 0) { 9241da177e4SLinus Torvalds if (i < 3) { 9251da177e4SLinus Torvalds ect->kl = 4; 9261da177e4SLinus Torvalds ect->dl = sizes_trk0[i] - 4; 9271da177e4SLinus Torvalds } 9281da177e4SLinus Torvalds } 9291da177e4SLinus Torvalds if ((fdata->intensity & 0x08) && 9301da177e4SLinus Torvalds fdata->start_unit == 1) { 9311da177e4SLinus Torvalds ect->kl = 44; 9321da177e4SLinus Torvalds ect->dl = LABEL_SIZE - 44; 9331da177e4SLinus Torvalds } 9341da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 9351da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 9361da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 9371da177e4SLinus Torvalds ccw->count = 8; 9381da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 9391da177e4SLinus Torvalds ccw++; 9401da177e4SLinus Torvalds } 9411da177e4SLinus Torvalds } 9421da177e4SLinus Torvalds fcp->device = device; 9431da177e4SLinus Torvalds fcp->retries = 2; /* set retry counter to enable ERP */ 9441da177e4SLinus Torvalds fcp->buildclk = get_clock(); 9451da177e4SLinus Torvalds fcp->status = DASD_CQR_FILLED; 9461da177e4SLinus Torvalds return fcp; 9471da177e4SLinus Torvalds } 9481da177e4SLinus Torvalds 9491da177e4SLinus Torvalds static dasd_era_t 9501da177e4SLinus Torvalds dasd_eckd_examine_error(struct dasd_ccw_req * cqr, struct irb * irb) 9511da177e4SLinus Torvalds { 9521da177e4SLinus Torvalds struct dasd_device *device = (struct dasd_device *) cqr->device; 9531da177e4SLinus Torvalds struct ccw_device *cdev = device->cdev; 9541da177e4SLinus Torvalds 9551da177e4SLinus Torvalds if (irb->scsw.cstat == 0x00 && 9561da177e4SLinus Torvalds irb->scsw.dstat == (DEV_STAT_CHN_END | DEV_STAT_DEV_END)) 9571da177e4SLinus Torvalds return dasd_era_none; 9581da177e4SLinus Torvalds 9591da177e4SLinus Torvalds switch (cdev->id.cu_type) { 9601da177e4SLinus Torvalds case 0x3990: 9611da177e4SLinus Torvalds case 0x2105: 9621da177e4SLinus Torvalds case 0x2107: 9631da177e4SLinus Torvalds case 0x1750: 9641da177e4SLinus Torvalds return dasd_3990_erp_examine(cqr, irb); 9651da177e4SLinus Torvalds case 0x9343: 9661da177e4SLinus Torvalds return dasd_9343_erp_examine(cqr, irb); 9671da177e4SLinus Torvalds case 0x3880: 9681da177e4SLinus Torvalds default: 9691da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 9701da177e4SLinus Torvalds "default (unknown CU type) - RECOVERABLE return"); 9711da177e4SLinus Torvalds return dasd_era_recover; 9721da177e4SLinus Torvalds } 9731da177e4SLinus Torvalds } 9741da177e4SLinus Torvalds 9751da177e4SLinus Torvalds static dasd_erp_fn_t 9761da177e4SLinus Torvalds dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 9771da177e4SLinus Torvalds { 9781da177e4SLinus Torvalds struct dasd_device *device = (struct dasd_device *) cqr->device; 9791da177e4SLinus Torvalds struct ccw_device *cdev = device->cdev; 9801da177e4SLinus Torvalds 9811da177e4SLinus Torvalds switch (cdev->id.cu_type) { 9821da177e4SLinus Torvalds case 0x3990: 9831da177e4SLinus Torvalds case 0x2105: 9841da177e4SLinus Torvalds case 0x2107: 9851da177e4SLinus Torvalds case 0x1750: 9861da177e4SLinus Torvalds return dasd_3990_erp_action; 9871da177e4SLinus Torvalds case 0x9343: 9881da177e4SLinus Torvalds case 0x3880: 9891da177e4SLinus Torvalds default: 9901da177e4SLinus Torvalds return dasd_default_erp_action; 9911da177e4SLinus Torvalds } 9921da177e4SLinus Torvalds } 9931da177e4SLinus Torvalds 9941da177e4SLinus Torvalds static dasd_erp_fn_t 9951da177e4SLinus Torvalds dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 9961da177e4SLinus Torvalds { 9971da177e4SLinus Torvalds return dasd_default_erp_postaction; 9981da177e4SLinus Torvalds } 9991da177e4SLinus Torvalds 10001da177e4SLinus Torvalds static struct dasd_ccw_req * 10011da177e4SLinus Torvalds dasd_eckd_build_cp(struct dasd_device * device, struct request *req) 10021da177e4SLinus Torvalds { 10031da177e4SLinus Torvalds struct dasd_eckd_private *private; 10041da177e4SLinus Torvalds unsigned long *idaws; 10051da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 10061da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 10071da177e4SLinus Torvalds struct ccw1 *ccw; 10081da177e4SLinus Torvalds struct bio *bio; 10091da177e4SLinus Torvalds struct bio_vec *bv; 10101da177e4SLinus Torvalds char *dst; 10111da177e4SLinus Torvalds unsigned int blksize, blk_per_trk, off; 10121da177e4SLinus Torvalds int count, cidaw, cplength, datasize; 10131da177e4SLinus Torvalds sector_t recid, first_rec, last_rec; 10141da177e4SLinus Torvalds sector_t first_trk, last_trk; 10151da177e4SLinus Torvalds unsigned int first_offs, last_offs; 10161da177e4SLinus Torvalds unsigned char cmd, rcmd; 10171da177e4SLinus Torvalds int i; 10181da177e4SLinus Torvalds 10191da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 10201da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 10211da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_READ_MT; 10221da177e4SLinus Torvalds else if (rq_data_dir(req) == WRITE) 10231da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_WRITE_MT; 10241da177e4SLinus Torvalds else 10251da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 10261da177e4SLinus Torvalds /* Calculate number of blocks/records per track. */ 10271da177e4SLinus Torvalds blksize = device->bp_block; 10281da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 10291da177e4SLinus Torvalds /* Calculate record id of first and last block. */ 10301da177e4SLinus Torvalds first_rec = first_trk = req->sector >> device->s2b_shift; 10311da177e4SLinus Torvalds first_offs = sector_div(first_trk, blk_per_trk); 10321da177e4SLinus Torvalds last_rec = last_trk = 10331da177e4SLinus Torvalds (req->sector + req->nr_sectors - 1) >> device->s2b_shift; 10341da177e4SLinus Torvalds last_offs = sector_div(last_trk, blk_per_trk); 10351da177e4SLinus Torvalds /* Check struct bio and count the number of blocks for the request. */ 10361da177e4SLinus Torvalds count = 0; 10371da177e4SLinus Torvalds cidaw = 0; 10381da177e4SLinus Torvalds rq_for_each_bio(bio, req) { 10391da177e4SLinus Torvalds bio_for_each_segment(bv, bio, i) { 10401da177e4SLinus Torvalds if (bv->bv_len & (blksize - 1)) 10411da177e4SLinus Torvalds /* Eckd can only do full blocks. */ 10421da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 10431da177e4SLinus Torvalds count += bv->bv_len >> (device->s2b_shift + 9); 10441da177e4SLinus Torvalds #if defined(CONFIG_ARCH_S390X) 10451da177e4SLinus Torvalds if (idal_is_needed (page_address(bv->bv_page), 10461da177e4SLinus Torvalds bv->bv_len)) 10471da177e4SLinus Torvalds cidaw += bv->bv_len >> (device->s2b_shift + 9); 10481da177e4SLinus Torvalds #endif 10491da177e4SLinus Torvalds } 10501da177e4SLinus Torvalds } 10511da177e4SLinus Torvalds /* Paranoia. */ 10521da177e4SLinus Torvalds if (count != last_rec - first_rec + 1) 10531da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 10541da177e4SLinus Torvalds /* 1x define extent + 1x locate record + number of blocks */ 10551da177e4SLinus Torvalds cplength = 2 + count; 10561da177e4SLinus Torvalds /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 10571da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + sizeof(struct LO_eckd_data) + 10581da177e4SLinus Torvalds cidaw * sizeof(unsigned long); 10591da177e4SLinus Torvalds /* Find out the number of additional locate record ccws for cdl. */ 10601da177e4SLinus Torvalds if (private->uses_cdl && first_rec < 2*blk_per_trk) { 10611da177e4SLinus Torvalds if (last_rec >= 2*blk_per_trk) 10621da177e4SLinus Torvalds count = 2*blk_per_trk - first_rec; 10631da177e4SLinus Torvalds cplength += count; 10641da177e4SLinus Torvalds datasize += count*sizeof(struct LO_eckd_data); 10651da177e4SLinus Torvalds } 10661da177e4SLinus Torvalds /* Allocate the ccw request. */ 10671da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 10681da177e4SLinus Torvalds cplength, datasize, device); 10691da177e4SLinus Torvalds if (IS_ERR(cqr)) 10701da177e4SLinus Torvalds return cqr; 10711da177e4SLinus Torvalds ccw = cqr->cpaddr; 10721da177e4SLinus Torvalds /* First ccw is define extent. */ 10731da177e4SLinus Torvalds define_extent(ccw++, cqr->data, first_trk, last_trk, cmd, device); 10741da177e4SLinus Torvalds /* Build locate_record+read/write/ccws. */ 10751da177e4SLinus Torvalds idaws = (unsigned long *) (cqr->data + sizeof(struct DE_eckd_data)); 10761da177e4SLinus Torvalds LO_data = (struct LO_eckd_data *) (idaws + cidaw); 10771da177e4SLinus Torvalds recid = first_rec; 10781da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 10791da177e4SLinus Torvalds /* Only standard blocks so there is just one locate record. */ 10801da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 10811da177e4SLinus Torvalds locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 10821da177e4SLinus Torvalds last_rec - recid + 1, cmd, device, blksize); 10831da177e4SLinus Torvalds } 10841da177e4SLinus Torvalds rq_for_each_bio(bio, req) bio_for_each_segment(bv, bio, i) { 10851da177e4SLinus Torvalds dst = page_address(bv->bv_page) + bv->bv_offset; 10861da177e4SLinus Torvalds if (dasd_page_cache) { 10871da177e4SLinus Torvalds char *copy = kmem_cache_alloc(dasd_page_cache, 10881da177e4SLinus Torvalds SLAB_DMA | __GFP_NOWARN); 10891da177e4SLinus Torvalds if (copy && rq_data_dir(req) == WRITE) 10901da177e4SLinus Torvalds memcpy(copy + bv->bv_offset, dst, bv->bv_len); 10911da177e4SLinus Torvalds if (copy) 10921da177e4SLinus Torvalds dst = copy + bv->bv_offset; 10931da177e4SLinus Torvalds } 10941da177e4SLinus Torvalds for (off = 0; off < bv->bv_len; off += blksize) { 10951da177e4SLinus Torvalds sector_t trkid = recid; 10961da177e4SLinus Torvalds unsigned int recoffs = sector_div(trkid, blk_per_trk); 10971da177e4SLinus Torvalds rcmd = cmd; 10981da177e4SLinus Torvalds count = blksize; 10991da177e4SLinus Torvalds /* Locate record for cdl special block ? */ 11001da177e4SLinus Torvalds if (private->uses_cdl && recid < 2*blk_per_trk) { 11011da177e4SLinus Torvalds if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 11021da177e4SLinus Torvalds rcmd |= 0x8; 11031da177e4SLinus Torvalds count = dasd_eckd_cdl_reclen(recid); 11041da177e4SLinus Torvalds if (count < blksize) 11051da177e4SLinus Torvalds memset(dst + count, 0xe5, 11061da177e4SLinus Torvalds blksize - count); 11071da177e4SLinus Torvalds } 11081da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 11091da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 11101da177e4SLinus Torvalds trkid, recoffs + 1, 11111da177e4SLinus Torvalds 1, rcmd, device, count); 11121da177e4SLinus Torvalds } 11131da177e4SLinus Torvalds /* Locate record for standard blocks ? */ 11141da177e4SLinus Torvalds if (private->uses_cdl && recid == 2*blk_per_trk) { 11151da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 11161da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 11171da177e4SLinus Torvalds trkid, recoffs + 1, 11181da177e4SLinus Torvalds last_rec - recid + 1, 11191da177e4SLinus Torvalds cmd, device, count); 11201da177e4SLinus Torvalds } 11211da177e4SLinus Torvalds /* Read/write ccw. */ 11221da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 11231da177e4SLinus Torvalds ccw->cmd_code = rcmd; 11241da177e4SLinus Torvalds ccw->count = count; 11251da177e4SLinus Torvalds if (idal_is_needed(dst, blksize)) { 11261da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) idaws; 11271da177e4SLinus Torvalds ccw->flags = CCW_FLAG_IDA; 11281da177e4SLinus Torvalds idaws = idal_create_words(idaws, dst, blksize); 11291da177e4SLinus Torvalds } else { 11301da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) dst; 11311da177e4SLinus Torvalds ccw->flags = 0; 11321da177e4SLinus Torvalds } 11331da177e4SLinus Torvalds ccw++; 11341da177e4SLinus Torvalds dst += blksize; 11351da177e4SLinus Torvalds recid++; 11361da177e4SLinus Torvalds } 11371da177e4SLinus Torvalds } 11381da177e4SLinus Torvalds cqr->device = device; 11391da177e4SLinus Torvalds cqr->expires = 5 * 60 * HZ; /* 5 minutes */ 11401da177e4SLinus Torvalds cqr->lpm = private->path_data.ppm; 11411da177e4SLinus Torvalds cqr->retries = 256; 11421da177e4SLinus Torvalds cqr->buildclk = get_clock(); 11431da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 11441da177e4SLinus Torvalds return cqr; 11451da177e4SLinus Torvalds } 11461da177e4SLinus Torvalds 11471da177e4SLinus Torvalds static int 11481da177e4SLinus Torvalds dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 11491da177e4SLinus Torvalds { 11501da177e4SLinus Torvalds struct dasd_eckd_private *private; 11511da177e4SLinus Torvalds struct ccw1 *ccw; 11521da177e4SLinus Torvalds struct bio *bio; 11531da177e4SLinus Torvalds struct bio_vec *bv; 11541da177e4SLinus Torvalds char *dst, *cda; 11551da177e4SLinus Torvalds unsigned int blksize, blk_per_trk, off; 11561da177e4SLinus Torvalds sector_t recid; 11571da177e4SLinus Torvalds int i, status; 11581da177e4SLinus Torvalds 11591da177e4SLinus Torvalds if (!dasd_page_cache) 11601da177e4SLinus Torvalds goto out; 11611da177e4SLinus Torvalds private = (struct dasd_eckd_private *) cqr->device->private; 11621da177e4SLinus Torvalds blksize = cqr->device->bp_block; 11631da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 11641da177e4SLinus Torvalds recid = req->sector >> cqr->device->s2b_shift; 11651da177e4SLinus Torvalds ccw = cqr->cpaddr; 11661da177e4SLinus Torvalds /* Skip over define extent & locate record. */ 11671da177e4SLinus Torvalds ccw++; 11681da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 11691da177e4SLinus Torvalds ccw++; 11701da177e4SLinus Torvalds rq_for_each_bio(bio, req) bio_for_each_segment(bv, bio, i) { 11711da177e4SLinus Torvalds dst = page_address(bv->bv_page) + bv->bv_offset; 11721da177e4SLinus Torvalds for (off = 0; off < bv->bv_len; off += blksize) { 11731da177e4SLinus Torvalds /* Skip locate record. */ 11741da177e4SLinus Torvalds if (private->uses_cdl && recid <= 2*blk_per_trk) 11751da177e4SLinus Torvalds ccw++; 11761da177e4SLinus Torvalds if (dst) { 11771da177e4SLinus Torvalds if (ccw->flags & CCW_FLAG_IDA) 11781da177e4SLinus Torvalds cda = *((char **)((addr_t) ccw->cda)); 11791da177e4SLinus Torvalds else 11801da177e4SLinus Torvalds cda = (char *)((addr_t) ccw->cda); 11811da177e4SLinus Torvalds if (dst != cda) { 11821da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 11831da177e4SLinus Torvalds memcpy(dst, cda, bv->bv_len); 11841da177e4SLinus Torvalds kmem_cache_free(dasd_page_cache, 11851da177e4SLinus Torvalds (void *)((addr_t)cda & PAGE_MASK)); 11861da177e4SLinus Torvalds } 11871da177e4SLinus Torvalds dst = NULL; 11881da177e4SLinus Torvalds } 11891da177e4SLinus Torvalds ccw++; 11901da177e4SLinus Torvalds recid++; 11911da177e4SLinus Torvalds } 11921da177e4SLinus Torvalds } 11931da177e4SLinus Torvalds out: 11941da177e4SLinus Torvalds status = cqr->status == DASD_CQR_DONE; 11951da177e4SLinus Torvalds dasd_sfree_request(cqr, cqr->device); 11961da177e4SLinus Torvalds return status; 11971da177e4SLinus Torvalds } 11981da177e4SLinus Torvalds 11991da177e4SLinus Torvalds static int 12001da177e4SLinus Torvalds dasd_eckd_fill_info(struct dasd_device * device, 12011da177e4SLinus Torvalds struct dasd_information2_t * info) 12021da177e4SLinus Torvalds { 12031da177e4SLinus Torvalds struct dasd_eckd_private *private; 12041da177e4SLinus Torvalds 12051da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 12061da177e4SLinus Torvalds info->label_block = 2; 12071da177e4SLinus Torvalds info->FBA_layout = private->uses_cdl ? 0 : 1; 12081da177e4SLinus Torvalds info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 12091da177e4SLinus Torvalds info->characteristics_size = sizeof(struct dasd_eckd_characteristics); 12101da177e4SLinus Torvalds memcpy(info->characteristics, &private->rdc_data, 12111da177e4SLinus Torvalds sizeof(struct dasd_eckd_characteristics)); 12121da177e4SLinus Torvalds info->confdata_size = sizeof (struct dasd_eckd_confdata); 12131da177e4SLinus Torvalds memcpy(info->configuration_data, &private->conf_data, 12141da177e4SLinus Torvalds sizeof (struct dasd_eckd_confdata)); 12151da177e4SLinus Torvalds return 0; 12161da177e4SLinus Torvalds } 12171da177e4SLinus Torvalds 12181da177e4SLinus Torvalds /* 12191da177e4SLinus Torvalds * SECTION: ioctl functions for eckd devices. 12201da177e4SLinus Torvalds */ 12211da177e4SLinus Torvalds 12221da177e4SLinus Torvalds /* 12231da177e4SLinus Torvalds * Release device ioctl. 12241da177e4SLinus Torvalds * Buils a channel programm to releases a prior reserved 12251da177e4SLinus Torvalds * (see dasd_eckd_reserve) device. 12261da177e4SLinus Torvalds */ 12271da177e4SLinus Torvalds static int 12281da177e4SLinus Torvalds dasd_eckd_release(struct block_device *bdev, int no, long args) 12291da177e4SLinus Torvalds { 12301da177e4SLinus Torvalds struct dasd_device *device; 12311da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 12321da177e4SLinus Torvalds int rc; 12331da177e4SLinus Torvalds 12341da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 12351da177e4SLinus Torvalds return -EACCES; 12361da177e4SLinus Torvalds 12371da177e4SLinus Torvalds device = bdev->bd_disk->private_data; 12381da177e4SLinus Torvalds if (device == NULL) 12391da177e4SLinus Torvalds return -ENODEV; 12401da177e4SLinus Torvalds 12411da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 12421da177e4SLinus Torvalds 1, 32, device); 12431da177e4SLinus Torvalds if (IS_ERR(cqr)) { 12441da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 12451da177e4SLinus Torvalds "Could not allocate initialization request"); 12461da177e4SLinus Torvalds return PTR_ERR(cqr); 12471da177e4SLinus Torvalds } 12481da177e4SLinus Torvalds cqr->cpaddr->cmd_code = DASD_ECKD_CCW_RELEASE; 12491da177e4SLinus Torvalds cqr->cpaddr->flags |= CCW_FLAG_SLI; 12501da177e4SLinus Torvalds cqr->cpaddr->count = 32; 12511da177e4SLinus Torvalds cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; 12521da177e4SLinus Torvalds cqr->device = device; 12531da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 12541da177e4SLinus Torvalds cqr->retries = 0; 12551da177e4SLinus Torvalds cqr->expires = 2 * HZ; 12561da177e4SLinus Torvalds cqr->buildclk = get_clock(); 12571da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 12581da177e4SLinus Torvalds 12591da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 12601da177e4SLinus Torvalds 12611da177e4SLinus Torvalds dasd_sfree_request(cqr, cqr->device); 12621da177e4SLinus Torvalds return rc; 12631da177e4SLinus Torvalds } 12641da177e4SLinus Torvalds 12651da177e4SLinus Torvalds /* 12661da177e4SLinus Torvalds * Reserve device ioctl. 12671da177e4SLinus Torvalds * Options are set to 'synchronous wait for interrupt' and 12681da177e4SLinus Torvalds * 'timeout the request'. This leads to a terminate IO if 12691da177e4SLinus Torvalds * the interrupt is outstanding for a certain time. 12701da177e4SLinus Torvalds */ 12711da177e4SLinus Torvalds static int 12721da177e4SLinus Torvalds dasd_eckd_reserve(struct block_device *bdev, int no, long args) 12731da177e4SLinus Torvalds { 12741da177e4SLinus Torvalds struct dasd_device *device; 12751da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 12761da177e4SLinus Torvalds int rc; 12771da177e4SLinus Torvalds 12781da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 12791da177e4SLinus Torvalds return -EACCES; 12801da177e4SLinus Torvalds 12811da177e4SLinus Torvalds device = bdev->bd_disk->private_data; 12821da177e4SLinus Torvalds if (device == NULL) 12831da177e4SLinus Torvalds return -ENODEV; 12841da177e4SLinus Torvalds 12851da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 12861da177e4SLinus Torvalds 1, 32, device); 12871da177e4SLinus Torvalds if (IS_ERR(cqr)) { 12881da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 12891da177e4SLinus Torvalds "Could not allocate initialization request"); 12901da177e4SLinus Torvalds return PTR_ERR(cqr); 12911da177e4SLinus Torvalds } 12921da177e4SLinus Torvalds cqr->cpaddr->cmd_code = DASD_ECKD_CCW_RESERVE; 12931da177e4SLinus Torvalds cqr->cpaddr->flags |= CCW_FLAG_SLI; 12941da177e4SLinus Torvalds cqr->cpaddr->count = 32; 12951da177e4SLinus Torvalds cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; 12961da177e4SLinus Torvalds cqr->device = device; 12971da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 12981da177e4SLinus Torvalds cqr->retries = 0; 12991da177e4SLinus Torvalds cqr->expires = 2 * HZ; 13001da177e4SLinus Torvalds cqr->buildclk = get_clock(); 13011da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 13021da177e4SLinus Torvalds 13031da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 13041da177e4SLinus Torvalds 13051da177e4SLinus Torvalds dasd_sfree_request(cqr, cqr->device); 13061da177e4SLinus Torvalds return rc; 13071da177e4SLinus Torvalds } 13081da177e4SLinus Torvalds 13091da177e4SLinus Torvalds /* 13101da177e4SLinus Torvalds * Steal lock ioctl - unconditional reserve device. 13111da177e4SLinus Torvalds * Buils a channel programm to break a device's reservation. 13121da177e4SLinus Torvalds * (unconditional reserve) 13131da177e4SLinus Torvalds */ 13141da177e4SLinus Torvalds static int 13151da177e4SLinus Torvalds dasd_eckd_steal_lock(struct block_device *bdev, int no, long args) 13161da177e4SLinus Torvalds { 13171da177e4SLinus Torvalds struct dasd_device *device; 13181da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 13191da177e4SLinus Torvalds int rc; 13201da177e4SLinus Torvalds 13211da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 13221da177e4SLinus Torvalds return -EACCES; 13231da177e4SLinus Torvalds 13241da177e4SLinus Torvalds device = bdev->bd_disk->private_data; 13251da177e4SLinus Torvalds if (device == NULL) 13261da177e4SLinus Torvalds return -ENODEV; 13271da177e4SLinus Torvalds 13281da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 13291da177e4SLinus Torvalds 1, 32, device); 13301da177e4SLinus Torvalds if (IS_ERR(cqr)) { 13311da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 13321da177e4SLinus Torvalds "Could not allocate initialization request"); 13331da177e4SLinus Torvalds return PTR_ERR(cqr); 13341da177e4SLinus Torvalds } 13351da177e4SLinus Torvalds cqr->cpaddr->cmd_code = DASD_ECKD_CCW_SLCK; 13361da177e4SLinus Torvalds cqr->cpaddr->flags |= CCW_FLAG_SLI; 13371da177e4SLinus Torvalds cqr->cpaddr->count = 32; 13381da177e4SLinus Torvalds cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; 13391da177e4SLinus Torvalds cqr->device = device; 13401da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 13411da177e4SLinus Torvalds cqr->retries = 0; 13421da177e4SLinus Torvalds cqr->expires = 2 * HZ; 13431da177e4SLinus Torvalds cqr->buildclk = get_clock(); 13441da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 13451da177e4SLinus Torvalds 13461da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 13471da177e4SLinus Torvalds 13481da177e4SLinus Torvalds dasd_sfree_request(cqr, cqr->device); 13491da177e4SLinus Torvalds return rc; 13501da177e4SLinus Torvalds } 13511da177e4SLinus Torvalds 13521da177e4SLinus Torvalds /* 13531da177e4SLinus Torvalds * Read performance statistics 13541da177e4SLinus Torvalds */ 13551da177e4SLinus Torvalds static int 13561da177e4SLinus Torvalds dasd_eckd_performance(struct block_device *bdev, int no, long args) 13571da177e4SLinus Torvalds { 13581da177e4SLinus Torvalds struct dasd_device *device; 13591da177e4SLinus Torvalds struct dasd_psf_prssd_data *prssdp; 13601da177e4SLinus Torvalds struct dasd_rssd_perf_stats_t *stats; 13611da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 13621da177e4SLinus Torvalds struct ccw1 *ccw; 13631da177e4SLinus Torvalds int rc; 13641da177e4SLinus Torvalds 13651da177e4SLinus Torvalds device = bdev->bd_disk->private_data; 13661da177e4SLinus Torvalds if (device == NULL) 13671da177e4SLinus Torvalds return -ENODEV; 13681da177e4SLinus Torvalds 13691da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 13701da177e4SLinus Torvalds 1 /* PSF */ + 1 /* RSSD */ , 13711da177e4SLinus Torvalds (sizeof (struct dasd_psf_prssd_data) + 13721da177e4SLinus Torvalds sizeof (struct dasd_rssd_perf_stats_t)), 13731da177e4SLinus Torvalds device); 13741da177e4SLinus Torvalds if (IS_ERR(cqr)) { 13751da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 13761da177e4SLinus Torvalds "Could not allocate initialization request"); 13771da177e4SLinus Torvalds return PTR_ERR(cqr); 13781da177e4SLinus Torvalds } 13791da177e4SLinus Torvalds cqr->device = device; 13801da177e4SLinus Torvalds cqr->retries = 0; 13811da177e4SLinus Torvalds cqr->expires = 10 * HZ; 13821da177e4SLinus Torvalds 13831da177e4SLinus Torvalds /* Prepare for Read Subsystem Data */ 13841da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 13851da177e4SLinus Torvalds memset(prssdp, 0, sizeof (struct dasd_psf_prssd_data)); 13861da177e4SLinus Torvalds prssdp->order = PSF_ORDER_PRSSD; 13871da177e4SLinus Torvalds prssdp->suborder = 0x01; /* Perfomance Statistics */ 13881da177e4SLinus Torvalds prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 13891da177e4SLinus Torvalds 13901da177e4SLinus Torvalds ccw = cqr->cpaddr; 13911da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_PSF; 13921da177e4SLinus Torvalds ccw->count = sizeof (struct dasd_psf_prssd_data); 13931da177e4SLinus Torvalds ccw->flags |= CCW_FLAG_CC; 13941da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) prssdp; 13951da177e4SLinus Torvalds 13961da177e4SLinus Torvalds /* Read Subsystem Data - Performance Statistics */ 13971da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 13981da177e4SLinus Torvalds memset(stats, 0, sizeof (struct dasd_rssd_perf_stats_t)); 13991da177e4SLinus Torvalds 14001da177e4SLinus Torvalds ccw++; 14011da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_RSSD; 14021da177e4SLinus Torvalds ccw->count = sizeof (struct dasd_rssd_perf_stats_t); 14031da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) stats; 14041da177e4SLinus Torvalds 14051da177e4SLinus Torvalds cqr->buildclk = get_clock(); 14061da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 14071da177e4SLinus Torvalds rc = dasd_sleep_on(cqr); 14081da177e4SLinus Torvalds if (rc == 0) { 14091da177e4SLinus Torvalds /* Prepare for Read Subsystem Data */ 14101da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 14111da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 14121da177e4SLinus Torvalds rc = copy_to_user((long __user *) args, (long *) stats, 14131da177e4SLinus Torvalds sizeof(struct dasd_rssd_perf_stats_t)); 14141da177e4SLinus Torvalds } 14151da177e4SLinus Torvalds dasd_sfree_request(cqr, cqr->device); 14161da177e4SLinus Torvalds return rc; 14171da177e4SLinus Torvalds } 14181da177e4SLinus Torvalds 14191da177e4SLinus Torvalds /* 14201da177e4SLinus Torvalds * Get attributes (cache operations) 14211da177e4SLinus Torvalds * Returnes the cache attributes used in Define Extend (DE). 14221da177e4SLinus Torvalds */ 14231da177e4SLinus Torvalds static int 14241da177e4SLinus Torvalds dasd_eckd_get_attrib (struct block_device *bdev, int no, long args) 14251da177e4SLinus Torvalds { 14261da177e4SLinus Torvalds struct dasd_device *device; 14271da177e4SLinus Torvalds struct dasd_eckd_private *private; 14281da177e4SLinus Torvalds struct attrib_data_t attrib; 14291da177e4SLinus Torvalds int rc; 14301da177e4SLinus Torvalds 14311da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 14321da177e4SLinus Torvalds return -EACCES; 14331da177e4SLinus Torvalds if (!args) 14341da177e4SLinus Torvalds return -EINVAL; 14351da177e4SLinus Torvalds 14361da177e4SLinus Torvalds device = bdev->bd_disk->private_data; 14371da177e4SLinus Torvalds if (device == NULL) 14381da177e4SLinus Torvalds return -ENODEV; 14391da177e4SLinus Torvalds 14401da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 14411da177e4SLinus Torvalds attrib = private->attrib; 14421da177e4SLinus Torvalds 14431da177e4SLinus Torvalds rc = copy_to_user((long __user *) args, (long *) &attrib, 14441da177e4SLinus Torvalds sizeof (struct attrib_data_t)); 14451da177e4SLinus Torvalds 14461da177e4SLinus Torvalds return rc; 14471da177e4SLinus Torvalds } 14481da177e4SLinus Torvalds 14491da177e4SLinus Torvalds /* 14501da177e4SLinus Torvalds * Set attributes (cache operations) 14511da177e4SLinus Torvalds * Stores the attributes for cache operation to be used in Define Extend (DE). 14521da177e4SLinus Torvalds */ 14531da177e4SLinus Torvalds static int 14541da177e4SLinus Torvalds dasd_eckd_set_attrib(struct block_device *bdev, int no, long args) 14551da177e4SLinus Torvalds { 14561da177e4SLinus Torvalds struct dasd_device *device; 14571da177e4SLinus Torvalds struct dasd_eckd_private *private; 14581da177e4SLinus Torvalds struct attrib_data_t attrib; 14591da177e4SLinus Torvalds 14601da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 14611da177e4SLinus Torvalds return -EACCES; 14621da177e4SLinus Torvalds if (!args) 14631da177e4SLinus Torvalds return -EINVAL; 14641da177e4SLinus Torvalds 14651da177e4SLinus Torvalds device = bdev->bd_disk->private_data; 14661da177e4SLinus Torvalds if (device == NULL) 14671da177e4SLinus Torvalds return -ENODEV; 14681da177e4SLinus Torvalds 14691da177e4SLinus Torvalds if (copy_from_user(&attrib, (void __user *) args, 14701da177e4SLinus Torvalds sizeof (struct attrib_data_t))) { 14711da177e4SLinus Torvalds return -EFAULT; 14721da177e4SLinus Torvalds } 14731da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 14741da177e4SLinus Torvalds private->attrib = attrib; 14751da177e4SLinus Torvalds 14761da177e4SLinus Torvalds DEV_MESSAGE(KERN_INFO, device, 14771da177e4SLinus Torvalds "cache operation mode set to %x (%i cylinder prestage)", 14781da177e4SLinus Torvalds private->attrib.operation, private->attrib.nr_cyl); 14791da177e4SLinus Torvalds return 0; 14801da177e4SLinus Torvalds } 14811da177e4SLinus Torvalds 14821da177e4SLinus Torvalds /* 14831da177e4SLinus Torvalds * Print sense data and related channel program. 14841da177e4SLinus Torvalds * Parts are printed because printk buffer is only 1024 bytes. 14851da177e4SLinus Torvalds */ 14861da177e4SLinus Torvalds static void 14871da177e4SLinus Torvalds dasd_eckd_dump_sense(struct dasd_device *device, struct dasd_ccw_req * req, 14881da177e4SLinus Torvalds struct irb *irb) 14891da177e4SLinus Torvalds { 14901da177e4SLinus Torvalds char *page; 14911da177e4SLinus Torvalds struct ccw1 *act, *end, *last; 14921da177e4SLinus Torvalds int len, sl, sct, count; 14931da177e4SLinus Torvalds 14941da177e4SLinus Torvalds page = (char *) get_zeroed_page(GFP_ATOMIC); 14951da177e4SLinus Torvalds if (page == NULL) { 14961da177e4SLinus Torvalds DEV_MESSAGE(KERN_ERR, device, " %s", 14971da177e4SLinus Torvalds "No memory to dump sense data"); 14981da177e4SLinus Torvalds return; 14991da177e4SLinus Torvalds } 15001da177e4SLinus Torvalds len = sprintf(page, KERN_ERR PRINTK_HEADER 15011da177e4SLinus Torvalds " I/O status report for device %s:\n", 15021da177e4SLinus Torvalds device->cdev->dev.bus_id); 15031da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 15041da177e4SLinus Torvalds " in req: %p CS: 0x%02X DS: 0x%02X\n", req, 15051da177e4SLinus Torvalds irb->scsw.cstat, irb->scsw.dstat); 15061da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 15071da177e4SLinus Torvalds " device %s: Failing CCW: %p\n", 15081da177e4SLinus Torvalds device->cdev->dev.bus_id, 15091da177e4SLinus Torvalds (void *) (addr_t) irb->scsw.cpa); 15101da177e4SLinus Torvalds if (irb->esw.esw0.erw.cons) { 15111da177e4SLinus Torvalds for (sl = 0; sl < 4; sl++) { 15121da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 15131da177e4SLinus Torvalds " Sense(hex) %2d-%2d:", 15141da177e4SLinus Torvalds (8 * sl), ((8 * sl) + 7)); 15151da177e4SLinus Torvalds 15161da177e4SLinus Torvalds for (sct = 0; sct < 8; sct++) { 15171da177e4SLinus Torvalds len += sprintf(page + len, " %02x", 15181da177e4SLinus Torvalds irb->ecw[8 * sl + sct]); 15191da177e4SLinus Torvalds } 15201da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 15211da177e4SLinus Torvalds } 15221da177e4SLinus Torvalds 15231da177e4SLinus Torvalds if (irb->ecw[27] & DASD_SENSE_BIT_0) { 15241da177e4SLinus Torvalds /* 24 Byte Sense Data */ 15251da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 15261da177e4SLinus Torvalds " 24 Byte: %x MSG %x, " 15271da177e4SLinus Torvalds "%s MSGb to SYSOP\n", 15281da177e4SLinus Torvalds irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 15291da177e4SLinus Torvalds irb->ecw[1] & 0x10 ? "" : "no"); 15301da177e4SLinus Torvalds } else { 15311da177e4SLinus Torvalds /* 32 Byte Sense Data */ 15321da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 15331da177e4SLinus Torvalds " 32 Byte: Format: %x " 15341da177e4SLinus Torvalds "Exception class %x\n", 15351da177e4SLinus Torvalds irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 15361da177e4SLinus Torvalds } 15371da177e4SLinus Torvalds } else { 15381da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 15391da177e4SLinus Torvalds " SORRY - NO VALID SENSE AVAILABLE\n"); 15401da177e4SLinus Torvalds } 15411da177e4SLinus Torvalds MESSAGE_LOG(KERN_ERR, "%s", 15421da177e4SLinus Torvalds page + sizeof(KERN_ERR PRINTK_HEADER)); 15431da177e4SLinus Torvalds 15441da177e4SLinus Torvalds /* dump the Channel Program */ 15451da177e4SLinus Torvalds /* print first CCWs (maximum 8) */ 15461da177e4SLinus Torvalds act = req->cpaddr; 15471da177e4SLinus Torvalds for (last = act; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 15481da177e4SLinus Torvalds end = min(act + 8, last); 15491da177e4SLinus Torvalds len = sprintf(page, KERN_ERR PRINTK_HEADER 15501da177e4SLinus Torvalds " Related CP in req: %p\n", req); 15511da177e4SLinus Torvalds while (act <= end) { 15521da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 15531da177e4SLinus Torvalds " CCW %p: %08X %08X DAT:", 15541da177e4SLinus Torvalds act, ((int *) act)[0], ((int *) act)[1]); 15551da177e4SLinus Torvalds for (count = 0; count < 32 && count < act->count; 15561da177e4SLinus Torvalds count += sizeof(int)) 15571da177e4SLinus Torvalds len += sprintf(page + len, " %08X", 15581da177e4SLinus Torvalds ((int *) (addr_t) act->cda) 15591da177e4SLinus Torvalds [(count>>2)]); 15601da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 15611da177e4SLinus Torvalds act++; 15621da177e4SLinus Torvalds } 15631da177e4SLinus Torvalds MESSAGE_LOG(KERN_ERR, "%s", 15641da177e4SLinus Torvalds page + sizeof(KERN_ERR PRINTK_HEADER)); 15651da177e4SLinus Torvalds 15661da177e4SLinus Torvalds /* print failing CCW area */ 15671da177e4SLinus Torvalds len = 0; 15681da177e4SLinus Torvalds if (act < ((struct ccw1 *)(addr_t) irb->scsw.cpa) - 2) { 15691da177e4SLinus Torvalds act = ((struct ccw1 *)(addr_t) irb->scsw.cpa) - 2; 15701da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n"); 15711da177e4SLinus Torvalds } 15721da177e4SLinus Torvalds end = min((struct ccw1 *)(addr_t) irb->scsw.cpa + 2, last); 15731da177e4SLinus Torvalds while (act <= end) { 15741da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 15751da177e4SLinus Torvalds " CCW %p: %08X %08X DAT:", 15761da177e4SLinus Torvalds act, ((int *) act)[0], ((int *) act)[1]); 15771da177e4SLinus Torvalds for (count = 0; count < 32 && count < act->count; 15781da177e4SLinus Torvalds count += sizeof(int)) 15791da177e4SLinus Torvalds len += sprintf(page + len, " %08X", 15801da177e4SLinus Torvalds ((int *) (addr_t) act->cda) 15811da177e4SLinus Torvalds [(count>>2)]); 15821da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 15831da177e4SLinus Torvalds act++; 15841da177e4SLinus Torvalds } 15851da177e4SLinus Torvalds 15861da177e4SLinus Torvalds /* print last CCWs */ 15871da177e4SLinus Torvalds if (act < last - 2) { 15881da177e4SLinus Torvalds act = last - 2; 15891da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n"); 15901da177e4SLinus Torvalds } 15911da177e4SLinus Torvalds while (act <= last) { 15921da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 15931da177e4SLinus Torvalds " CCW %p: %08X %08X DAT:", 15941da177e4SLinus Torvalds act, ((int *) act)[0], ((int *) act)[1]); 15951da177e4SLinus Torvalds for (count = 0; count < 32 && count < act->count; 15961da177e4SLinus Torvalds count += sizeof(int)) 15971da177e4SLinus Torvalds len += sprintf(page + len, " %08X", 15981da177e4SLinus Torvalds ((int *) (addr_t) act->cda) 15991da177e4SLinus Torvalds [(count>>2)]); 16001da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 16011da177e4SLinus Torvalds act++; 16021da177e4SLinus Torvalds } 16031da177e4SLinus Torvalds if (len > 0) 16041da177e4SLinus Torvalds MESSAGE_LOG(KERN_ERR, "%s", 16051da177e4SLinus Torvalds page + sizeof(KERN_ERR PRINTK_HEADER)); 16061da177e4SLinus Torvalds free_page((unsigned long) page); 16071da177e4SLinus Torvalds } 16081da177e4SLinus Torvalds 16091da177e4SLinus Torvalds /* 16101da177e4SLinus Torvalds * max_blocks is dependent on the amount of storage that is available 16111da177e4SLinus Torvalds * in the static io buffer for each device. Currently each device has 16121da177e4SLinus Torvalds * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has 16131da177e4SLinus Torvalds * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use 16141da177e4SLinus Torvalds * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In 16151da177e4SLinus Torvalds * addition we have one define extent ccw + 16 bytes of data and one 16161da177e4SLinus Torvalds * locate record ccw + 16 bytes of data. That makes: 16171da177e4SLinus Torvalds * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. 16181da177e4SLinus Torvalds * We want to fit two into the available memory so that we can immediately 16191da177e4SLinus Torvalds * start the next request if one finishes off. That makes 249.5 blocks 16201da177e4SLinus Torvalds * for one request. Give a little safety and the result is 240. 16211da177e4SLinus Torvalds */ 16221da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline = { 16231da177e4SLinus Torvalds .owner = THIS_MODULE, 16241da177e4SLinus Torvalds .name = "ECKD", 16251da177e4SLinus Torvalds .ebcname = "ECKD", 16261da177e4SLinus Torvalds .max_blocks = 240, 16271da177e4SLinus Torvalds .check_device = dasd_eckd_check_characteristics, 16281da177e4SLinus Torvalds .do_analysis = dasd_eckd_do_analysis, 16291da177e4SLinus Torvalds .fill_geometry = dasd_eckd_fill_geometry, 16301da177e4SLinus Torvalds .start_IO = dasd_start_IO, 16311da177e4SLinus Torvalds .term_IO = dasd_term_IO, 16321da177e4SLinus Torvalds .format_device = dasd_eckd_format_device, 16331da177e4SLinus Torvalds .examine_error = dasd_eckd_examine_error, 16341da177e4SLinus Torvalds .erp_action = dasd_eckd_erp_action, 16351da177e4SLinus Torvalds .erp_postaction = dasd_eckd_erp_postaction, 16361da177e4SLinus Torvalds .build_cp = dasd_eckd_build_cp, 16371da177e4SLinus Torvalds .free_cp = dasd_eckd_free_cp, 16381da177e4SLinus Torvalds .dump_sense = dasd_eckd_dump_sense, 16391da177e4SLinus Torvalds .fill_info = dasd_eckd_fill_info, 16401da177e4SLinus Torvalds }; 16411da177e4SLinus Torvalds 16421da177e4SLinus Torvalds static int __init 16431da177e4SLinus Torvalds dasd_eckd_init(void) 16441da177e4SLinus Torvalds { 16451da177e4SLinus Torvalds int ret; 16461da177e4SLinus Torvalds 16471da177e4SLinus Torvalds dasd_ioctl_no_register(THIS_MODULE, BIODASDGATTR, 16481da177e4SLinus Torvalds dasd_eckd_get_attrib); 16491da177e4SLinus Torvalds dasd_ioctl_no_register(THIS_MODULE, BIODASDSATTR, 16501da177e4SLinus Torvalds dasd_eckd_set_attrib); 16511da177e4SLinus Torvalds dasd_ioctl_no_register(THIS_MODULE, BIODASDPSRD, 16521da177e4SLinus Torvalds dasd_eckd_performance); 16531da177e4SLinus Torvalds dasd_ioctl_no_register(THIS_MODULE, BIODASDRLSE, 16541da177e4SLinus Torvalds dasd_eckd_release); 16551da177e4SLinus Torvalds dasd_ioctl_no_register(THIS_MODULE, BIODASDRSRV, 16561da177e4SLinus Torvalds dasd_eckd_reserve); 16571da177e4SLinus Torvalds dasd_ioctl_no_register(THIS_MODULE, BIODASDSLCK, 16581da177e4SLinus Torvalds dasd_eckd_steal_lock); 16591da177e4SLinus Torvalds 16601da177e4SLinus Torvalds ASCEBC(dasd_eckd_discipline.ebcname, 4); 16611da177e4SLinus Torvalds 16621da177e4SLinus Torvalds ret = ccw_driver_register(&dasd_eckd_driver); 16631da177e4SLinus Torvalds if (ret) { 16641da177e4SLinus Torvalds dasd_ioctl_no_unregister(THIS_MODULE, BIODASDGATTR, 16651da177e4SLinus Torvalds dasd_eckd_get_attrib); 16661da177e4SLinus Torvalds dasd_ioctl_no_unregister(THIS_MODULE, BIODASDSATTR, 16671da177e4SLinus Torvalds dasd_eckd_set_attrib); 16681da177e4SLinus Torvalds dasd_ioctl_no_unregister(THIS_MODULE, BIODASDPSRD, 16691da177e4SLinus Torvalds dasd_eckd_performance); 16701da177e4SLinus Torvalds dasd_ioctl_no_unregister(THIS_MODULE, BIODASDRLSE, 16711da177e4SLinus Torvalds dasd_eckd_release); 16721da177e4SLinus Torvalds dasd_ioctl_no_unregister(THIS_MODULE, BIODASDRSRV, 16731da177e4SLinus Torvalds dasd_eckd_reserve); 16741da177e4SLinus Torvalds dasd_ioctl_no_unregister(THIS_MODULE, BIODASDSLCK, 16751da177e4SLinus Torvalds dasd_eckd_steal_lock); 16761da177e4SLinus Torvalds return ret; 16771da177e4SLinus Torvalds } 16781da177e4SLinus Torvalds 16791da177e4SLinus Torvalds dasd_generic_auto_online(&dasd_eckd_driver); 16801da177e4SLinus Torvalds return 0; 16811da177e4SLinus Torvalds } 16821da177e4SLinus Torvalds 16831da177e4SLinus Torvalds static void __exit 16841da177e4SLinus Torvalds dasd_eckd_cleanup(void) 16851da177e4SLinus Torvalds { 16861da177e4SLinus Torvalds ccw_driver_unregister(&dasd_eckd_driver); 16871da177e4SLinus Torvalds 16881da177e4SLinus Torvalds dasd_ioctl_no_unregister(THIS_MODULE, BIODASDGATTR, 16891da177e4SLinus Torvalds dasd_eckd_get_attrib); 16901da177e4SLinus Torvalds dasd_ioctl_no_unregister(THIS_MODULE, BIODASDSATTR, 16911da177e4SLinus Torvalds dasd_eckd_set_attrib); 16921da177e4SLinus Torvalds dasd_ioctl_no_unregister(THIS_MODULE, BIODASDPSRD, 16931da177e4SLinus Torvalds dasd_eckd_performance); 16941da177e4SLinus Torvalds dasd_ioctl_no_unregister(THIS_MODULE, BIODASDRLSE, 16951da177e4SLinus Torvalds dasd_eckd_release); 16961da177e4SLinus Torvalds dasd_ioctl_no_unregister(THIS_MODULE, BIODASDRSRV, 16971da177e4SLinus Torvalds dasd_eckd_reserve); 16981da177e4SLinus Torvalds dasd_ioctl_no_unregister(THIS_MODULE, BIODASDSLCK, 16991da177e4SLinus Torvalds dasd_eckd_steal_lock); 17001da177e4SLinus Torvalds } 17011da177e4SLinus Torvalds 17021da177e4SLinus Torvalds module_init(dasd_eckd_init); 17031da177e4SLinus Torvalds module_exit(dasd_eckd_cleanup); 17041da177e4SLinus Torvalds 17051da177e4SLinus Torvalds /* 17061da177e4SLinus Torvalds * Overrides for Emacs so that we follow Linus's tabbing style. 17071da177e4SLinus Torvalds * Emacs will notice this stuff at the end of the file and automatically 17081da177e4SLinus Torvalds * adjust the settings for this buffer only. This must remain at the end 17091da177e4SLinus Torvalds * of the file. 17101da177e4SLinus Torvalds * --------------------------------------------------------------------------- 17111da177e4SLinus Torvalds * Local variables: 17121da177e4SLinus Torvalds * c-indent-level: 4 17131da177e4SLinus Torvalds * c-brace-imaginary-offset: 0 17141da177e4SLinus Torvalds * c-brace-offset: -4 17151da177e4SLinus Torvalds * c-argdecl-indent: 4 17161da177e4SLinus Torvalds * c-label-offset: -4 17171da177e4SLinus Torvalds * c-continued-statement-offset: 4 17181da177e4SLinus Torvalds * c-continued-brace-offset: 0 17191da177e4SLinus Torvalds * indent-tabs-mode: 1 17201da177e4SLinus Torvalds * tab-width: 8 17211da177e4SLinus Torvalds * End: 17221da177e4SLinus Torvalds */ 1723