11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * File...........: linux/drivers/s390/block/dasd_eckd.c 31da177e4SLinus Torvalds * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> 41da177e4SLinus Torvalds * Horst Hummel <Horst.Hummel@de.ibm.com> 51da177e4SLinus Torvalds * Carsten Otte <Cotte@de.ibm.com> 61da177e4SLinus Torvalds * Martin Schwidefsky <schwidefsky@de.ibm.com> 71da177e4SLinus Torvalds * Bugreports.to..: <Linux390@de.ibm.com> 81da177e4SLinus Torvalds * (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999,2000 91da177e4SLinus Torvalds * 101da177e4SLinus Torvalds */ 111da177e4SLinus Torvalds 121da177e4SLinus Torvalds #include <linux/stddef.h> 131da177e4SLinus Torvalds #include <linux/kernel.h> 141da177e4SLinus Torvalds #include <linux/slab.h> 151da177e4SLinus Torvalds #include <linux/hdreg.h> /* HDIO_GETGEO */ 161da177e4SLinus Torvalds #include <linux/bio.h> 171da177e4SLinus Torvalds #include <linux/module.h> 181da177e4SLinus Torvalds #include <linux/init.h> 191da177e4SLinus Torvalds 201da177e4SLinus Torvalds #include <asm/debug.h> 211da177e4SLinus Torvalds #include <asm/idals.h> 221da177e4SLinus Torvalds #include <asm/ebcdic.h> 231da177e4SLinus Torvalds #include <asm/io.h> 241da177e4SLinus Torvalds #include <asm/todclk.h> 251da177e4SLinus Torvalds #include <asm/uaccess.h> 2640545573SHorst Hummel #include <asm/cio.h> 271da177e4SLinus Torvalds #include <asm/ccwdev.h> 281da177e4SLinus Torvalds 291da177e4SLinus Torvalds #include "dasd_int.h" 301da177e4SLinus Torvalds #include "dasd_eckd.h" 311da177e4SLinus Torvalds 321da177e4SLinus Torvalds #ifdef PRINTK_HEADER 331da177e4SLinus Torvalds #undef PRINTK_HEADER 341da177e4SLinus Torvalds #endif /* PRINTK_HEADER */ 351da177e4SLinus Torvalds #define PRINTK_HEADER "dasd(eckd):" 361da177e4SLinus Torvalds 371da177e4SLinus Torvalds #define ECKD_C0(i) (i->home_bytes) 381da177e4SLinus Torvalds #define ECKD_F(i) (i->formula) 391da177e4SLinus Torvalds #define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\ 401da177e4SLinus Torvalds (i->factors.f_0x02.f1)) 411da177e4SLinus Torvalds #define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\ 421da177e4SLinus Torvalds (i->factors.f_0x02.f2)) 431da177e4SLinus Torvalds #define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\ 441da177e4SLinus Torvalds (i->factors.f_0x02.f3)) 451da177e4SLinus Torvalds #define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0) 461da177e4SLinus Torvalds #define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0) 471da177e4SLinus Torvalds #define ECKD_F6(i) (i->factor6) 481da177e4SLinus Torvalds #define ECKD_F7(i) (i->factor7) 491da177e4SLinus Torvalds #define ECKD_F8(i) (i->factor8) 501da177e4SLinus Torvalds 511da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 521da177e4SLinus Torvalds 531da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline; 541da177e4SLinus Torvalds 551da177e4SLinus Torvalds /* The ccw bus type uses this table to find devices that it sends to 561da177e4SLinus Torvalds * dasd_eckd_probe */ 571da177e4SLinus Torvalds static struct ccw_device_id dasd_eckd_ids[] = { 58d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1}, 59d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2}, 60d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3390, 0), .driver_info = 0x3}, 61d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4}, 62d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5}, 63d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6}, 64d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7}, 65d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8}, 66d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9}, 67d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa}, 681da177e4SLinus Torvalds { /* end of list */ }, 691da177e4SLinus Torvalds }; 701da177e4SLinus Torvalds 711da177e4SLinus Torvalds MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids); 721da177e4SLinus Torvalds 731da177e4SLinus Torvalds static struct ccw_driver dasd_eckd_driver; /* see below */ 741da177e4SLinus Torvalds 751da177e4SLinus Torvalds /* initial attempt at a probe function. this can be simplified once 761da177e4SLinus Torvalds * the other detection code is gone */ 771da177e4SLinus Torvalds static int 781da177e4SLinus Torvalds dasd_eckd_probe (struct ccw_device *cdev) 791da177e4SLinus Torvalds { 801da177e4SLinus Torvalds int ret; 811da177e4SLinus Torvalds 8240545573SHorst Hummel /* set ECKD specific ccw-device options */ 8340545573SHorst Hummel ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE); 8440545573SHorst Hummel if (ret) { 8540545573SHorst Hummel printk(KERN_WARNING 8640545573SHorst Hummel "dasd_eckd_probe: could not set ccw-device options " 8740545573SHorst Hummel "for %s\n", cdev->dev.bus_id); 881da177e4SLinus Torvalds return ret; 8940545573SHorst Hummel } 9040545573SHorst Hummel ret = dasd_generic_probe(cdev, &dasd_eckd_discipline); 9140545573SHorst Hummel return ret; 921da177e4SLinus Torvalds } 931da177e4SLinus Torvalds 941da177e4SLinus Torvalds static int 951da177e4SLinus Torvalds dasd_eckd_set_online(struct ccw_device *cdev) 961da177e4SLinus Torvalds { 971da177e4SLinus Torvalds return dasd_generic_set_online(cdev, &dasd_eckd_discipline); 981da177e4SLinus Torvalds } 991da177e4SLinus Torvalds 1001da177e4SLinus Torvalds static struct ccw_driver dasd_eckd_driver = { 1011da177e4SLinus Torvalds .name = "dasd-eckd", 1021da177e4SLinus Torvalds .owner = THIS_MODULE, 1031da177e4SLinus Torvalds .ids = dasd_eckd_ids, 1041da177e4SLinus Torvalds .probe = dasd_eckd_probe, 1051da177e4SLinus Torvalds .remove = dasd_generic_remove, 1061da177e4SLinus Torvalds .set_offline = dasd_generic_set_offline, 1071da177e4SLinus Torvalds .set_online = dasd_eckd_set_online, 1081da177e4SLinus Torvalds .notify = dasd_generic_notify, 1091da177e4SLinus Torvalds }; 1101da177e4SLinus Torvalds 1111da177e4SLinus Torvalds static const int sizes_trk0[] = { 28, 148, 84 }; 1121da177e4SLinus Torvalds #define LABEL_SIZE 140 1131da177e4SLinus Torvalds 1141da177e4SLinus Torvalds static inline unsigned int 1151da177e4SLinus Torvalds round_up_multiple(unsigned int no, unsigned int mult) 1161da177e4SLinus Torvalds { 1171da177e4SLinus Torvalds int rem = no % mult; 1181da177e4SLinus Torvalds return (rem ? no - rem + mult : no); 1191da177e4SLinus Torvalds } 1201da177e4SLinus Torvalds 1211da177e4SLinus Torvalds static inline unsigned int 1221da177e4SLinus Torvalds ceil_quot(unsigned int d1, unsigned int d2) 1231da177e4SLinus Torvalds { 1241da177e4SLinus Torvalds return (d1 + (d2 - 1)) / d2; 1251da177e4SLinus Torvalds } 1261da177e4SLinus Torvalds 1274d284cacSHeiko Carstens static unsigned int 1281da177e4SLinus Torvalds recs_per_track(struct dasd_eckd_characteristics * rdc, 1291da177e4SLinus Torvalds unsigned int kl, unsigned int dl) 1301da177e4SLinus Torvalds { 1311da177e4SLinus Torvalds int dn, kn; 1321da177e4SLinus Torvalds 1331da177e4SLinus Torvalds switch (rdc->dev_type) { 1341da177e4SLinus Torvalds case 0x3380: 1351da177e4SLinus Torvalds if (kl) 1361da177e4SLinus Torvalds return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + 1371da177e4SLinus Torvalds ceil_quot(dl + 12, 32)); 1381da177e4SLinus Torvalds else 1391da177e4SLinus Torvalds return 1499 / (15 + ceil_quot(dl + 12, 32)); 1401da177e4SLinus Torvalds case 0x3390: 1411da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1421da177e4SLinus Torvalds if (kl) { 1431da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1441da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + 1451da177e4SLinus Torvalds 9 + ceil_quot(dl + 6 * dn, 34)); 1461da177e4SLinus Torvalds } else 1471da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); 1481da177e4SLinus Torvalds case 0x9345: 1491da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1501da177e4SLinus Torvalds if (kl) { 1511da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1521da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + 1531da177e4SLinus Torvalds ceil_quot(dl + 6 * dn, 34)); 1541da177e4SLinus Torvalds } else 1551da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); 1561da177e4SLinus Torvalds } 1571da177e4SLinus Torvalds return 0; 1581da177e4SLinus Torvalds } 1591da177e4SLinus Torvalds 1604d284cacSHeiko Carstens static int 1611da177e4SLinus Torvalds check_XRC (struct ccw1 *de_ccw, 1621da177e4SLinus Torvalds struct DE_eckd_data *data, 1631da177e4SLinus Torvalds struct dasd_device *device) 1641da177e4SLinus Torvalds { 1651da177e4SLinus Torvalds struct dasd_eckd_private *private; 166d54853efSMartin Schwidefsky int rc; 1671da177e4SLinus Torvalds 1681da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 169d54853efSMartin Schwidefsky if (!private->rdc_data.facilities.XRC_supported) 170d54853efSMartin Schwidefsky return 0; 1711da177e4SLinus Torvalds 1721da177e4SLinus Torvalds /* switch on System Time Stamp - needed for XRC Support */ 1731da177e4SLinus Torvalds data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ 1741da177e4SLinus Torvalds data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ 1751da177e4SLinus Torvalds 176d54853efSMartin Schwidefsky rc = get_sync_clock(&data->ep_sys_time); 177d54853efSMartin Schwidefsky /* Ignore return code if sync clock is switched off. */ 178d54853efSMartin Schwidefsky if (rc == -ENOSYS || rc == -EACCES) 179d54853efSMartin Schwidefsky rc = 0; 1801da177e4SLinus Torvalds 1811da177e4SLinus Torvalds de_ccw->count = sizeof(struct DE_eckd_data); 1821da177e4SLinus Torvalds de_ccw->flags |= CCW_FLAG_SLI; 183d54853efSMartin Schwidefsky return rc; 1841da177e4SLinus Torvalds } 1851da177e4SLinus Torvalds 1864d284cacSHeiko Carstens static int 1871da177e4SLinus Torvalds define_extent(struct ccw1 * ccw, struct DE_eckd_data * data, int trk, 1881da177e4SLinus Torvalds int totrk, int cmd, struct dasd_device * device) 1891da177e4SLinus Torvalds { 1901da177e4SLinus Torvalds struct dasd_eckd_private *private; 1911da177e4SLinus Torvalds struct ch_t geo, beg, end; 192d54853efSMartin Schwidefsky int rc = 0; 1931da177e4SLinus Torvalds 1941da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 1951da177e4SLinus Torvalds 1961da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; 1971da177e4SLinus Torvalds ccw->flags = 0; 1981da177e4SLinus Torvalds ccw->count = 16; 1991da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 2001da177e4SLinus Torvalds 2011da177e4SLinus Torvalds memset(data, 0, sizeof(struct DE_eckd_data)); 2021da177e4SLinus Torvalds switch (cmd) { 2031da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 2041da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 2051da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 2061da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 2071da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 2081da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 2091da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 2101da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 2111da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_COUNT: 2121da177e4SLinus Torvalds data->mask.perm = 0x1; 2131da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 2141da177e4SLinus Torvalds break; 2151da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 2161da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 2171da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 2181da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 2191da177e4SLinus Torvalds data->mask.perm = 0x02; 2201da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 221d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2221da177e4SLinus Torvalds break; 2231da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 2241da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 2251da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 226d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2271da177e4SLinus Torvalds break; 2281da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 2291da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 2301da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 2311da177e4SLinus Torvalds data->mask.perm = 0x3; 2321da177e4SLinus Torvalds data->mask.auth = 0x1; 2331da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 234d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2351da177e4SLinus Torvalds break; 2361da177e4SLinus Torvalds default: 2371da177e4SLinus Torvalds DEV_MESSAGE(KERN_ERR, device, "unknown opcode 0x%x", cmd); 2381da177e4SLinus Torvalds break; 2391da177e4SLinus Torvalds } 2401da177e4SLinus Torvalds 2411da177e4SLinus Torvalds data->attributes.mode = 0x3; /* ECKD */ 2421da177e4SLinus Torvalds 2431da177e4SLinus Torvalds if ((private->rdc_data.cu_type == 0x2105 || 2441da177e4SLinus Torvalds private->rdc_data.cu_type == 0x2107 || 2451da177e4SLinus Torvalds private->rdc_data.cu_type == 0x1750) 2461da177e4SLinus Torvalds && !(private->uses_cdl && trk < 2)) 2471da177e4SLinus Torvalds data->ga_extended |= 0x40; /* Regular Data Format Mode */ 2481da177e4SLinus Torvalds 2491da177e4SLinus Torvalds geo.cyl = private->rdc_data.no_cyl; 2501da177e4SLinus Torvalds geo.head = private->rdc_data.trk_per_cyl; 2511da177e4SLinus Torvalds beg.cyl = trk / geo.head; 2521da177e4SLinus Torvalds beg.head = trk % geo.head; 2531da177e4SLinus Torvalds end.cyl = totrk / geo.head; 2541da177e4SLinus Torvalds end.head = totrk % geo.head; 2551da177e4SLinus Torvalds 2561da177e4SLinus Torvalds /* check for sequential prestage - enhance cylinder range */ 2571da177e4SLinus Torvalds if (data->attributes.operation == DASD_SEQ_PRESTAGE || 2581da177e4SLinus Torvalds data->attributes.operation == DASD_SEQ_ACCESS) { 2591da177e4SLinus Torvalds 2601da177e4SLinus Torvalds if (end.cyl + private->attrib.nr_cyl < geo.cyl) 2611da177e4SLinus Torvalds end.cyl += private->attrib.nr_cyl; 2621da177e4SLinus Torvalds else 2631da177e4SLinus Torvalds end.cyl = (geo.cyl - 1); 2641da177e4SLinus Torvalds } 2651da177e4SLinus Torvalds 2661da177e4SLinus Torvalds data->beg_ext.cyl = beg.cyl; 2671da177e4SLinus Torvalds data->beg_ext.head = beg.head; 2681da177e4SLinus Torvalds data->end_ext.cyl = end.cyl; 2691da177e4SLinus Torvalds data->end_ext.head = end.head; 270d54853efSMartin Schwidefsky return rc; 2711da177e4SLinus Torvalds } 2721da177e4SLinus Torvalds 2738e09f215SStefan Weinhuber static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata, 2748e09f215SStefan Weinhuber struct dasd_device *device) 2758e09f215SStefan Weinhuber { 2768e09f215SStefan Weinhuber struct dasd_eckd_private *private; 2778e09f215SStefan Weinhuber int rc; 2788e09f215SStefan Weinhuber 2798e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 2808e09f215SStefan Weinhuber if (!private->rdc_data.facilities.XRC_supported) 2818e09f215SStefan Weinhuber return 0; 2828e09f215SStefan Weinhuber 2838e09f215SStefan Weinhuber /* switch on System Time Stamp - needed for XRC Support */ 2848e09f215SStefan Weinhuber pfxdata->define_extend.ga_extended |= 0x08; /* 'Time Stamp Valid' */ 2858e09f215SStefan Weinhuber pfxdata->define_extend.ga_extended |= 0x02; /* 'Extended Parameter' */ 2868e09f215SStefan Weinhuber pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */ 2878e09f215SStefan Weinhuber 2888e09f215SStefan Weinhuber rc = get_sync_clock(&pfxdata->define_extend.ep_sys_time); 2898e09f215SStefan Weinhuber /* Ignore return code if sync clock is switched off. */ 2908e09f215SStefan Weinhuber if (rc == -ENOSYS || rc == -EACCES) 2918e09f215SStefan Weinhuber rc = 0; 2928e09f215SStefan Weinhuber return rc; 2938e09f215SStefan Weinhuber } 2948e09f215SStefan Weinhuber 2958e09f215SStefan Weinhuber static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, int trk, 2968e09f215SStefan Weinhuber int totrk, int cmd, struct dasd_device *basedev, 2978e09f215SStefan Weinhuber struct dasd_device *startdev) 2988e09f215SStefan Weinhuber { 2998e09f215SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 3008e09f215SStefan Weinhuber struct DE_eckd_data *data; 3018e09f215SStefan Weinhuber struct ch_t geo, beg, end; 3028e09f215SStefan Weinhuber int rc = 0; 3038e09f215SStefan Weinhuber 3048e09f215SStefan Weinhuber basepriv = (struct dasd_eckd_private *) basedev->private; 3058e09f215SStefan Weinhuber startpriv = (struct dasd_eckd_private *) startdev->private; 3068e09f215SStefan Weinhuber data = &pfxdata->define_extend; 3078e09f215SStefan Weinhuber 3088e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PFX; 3098e09f215SStefan Weinhuber ccw->flags = 0; 3108e09f215SStefan Weinhuber ccw->count = sizeof(*pfxdata); 3118e09f215SStefan Weinhuber ccw->cda = (__u32) __pa(pfxdata); 3128e09f215SStefan Weinhuber 3138e09f215SStefan Weinhuber memset(pfxdata, 0, sizeof(*pfxdata)); 3148e09f215SStefan Weinhuber /* prefix data */ 3158e09f215SStefan Weinhuber pfxdata->format = 0; 3168e09f215SStefan Weinhuber pfxdata->base_address = basepriv->conf_data.ned1.unit_addr; 3178e09f215SStefan Weinhuber pfxdata->base_lss = basepriv->conf_data.ned1.ID; 3188e09f215SStefan Weinhuber pfxdata->validity.define_extend = 1; 3198e09f215SStefan Weinhuber 3208e09f215SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 3218e09f215SStefan Weinhuber if (startpriv->uid.type != UA_BASE_DEVICE) { 3228e09f215SStefan Weinhuber pfxdata->validity.verify_base = 1; 3238e09f215SStefan Weinhuber if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 3248e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 1; 3258e09f215SStefan Weinhuber } 3268e09f215SStefan Weinhuber 3278e09f215SStefan Weinhuber /* define extend data (mostly)*/ 3288e09f215SStefan Weinhuber switch (cmd) { 3298e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_HOME_ADDRESS: 3308e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_RECORD_ZERO: 3318e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ: 3328e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_MT: 3338e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD: 3348e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD_MT: 3358e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_KD: 3368e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_KD_MT: 3378e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_COUNT: 3388e09f215SStefan Weinhuber data->mask.perm = 0x1; 3398e09f215SStefan Weinhuber data->attributes.operation = basepriv->attrib.operation; 3408e09f215SStefan Weinhuber break; 3418e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE: 3428e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_MT: 3438e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD: 3448e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD_MT: 3458e09f215SStefan Weinhuber data->mask.perm = 0x02; 3468e09f215SStefan Weinhuber data->attributes.operation = basepriv->attrib.operation; 3478e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 3488e09f215SStefan Weinhuber break; 3498e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD: 3508e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD_MT: 3518e09f215SStefan Weinhuber data->attributes.operation = DASD_BYPASS_CACHE; 3528e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 3538e09f215SStefan Weinhuber break; 3548e09f215SStefan Weinhuber case DASD_ECKD_CCW_ERASE: 3558e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 3568e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 3578e09f215SStefan Weinhuber data->mask.perm = 0x3; 3588e09f215SStefan Weinhuber data->mask.auth = 0x1; 3598e09f215SStefan Weinhuber data->attributes.operation = DASD_BYPASS_CACHE; 3608e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 3618e09f215SStefan Weinhuber break; 3628e09f215SStefan Weinhuber default: 3638e09f215SStefan Weinhuber DEV_MESSAGE(KERN_ERR, basedev, "unknown opcode 0x%x", cmd); 3648e09f215SStefan Weinhuber break; 3658e09f215SStefan Weinhuber } 3668e09f215SStefan Weinhuber 3678e09f215SStefan Weinhuber data->attributes.mode = 0x3; /* ECKD */ 3688e09f215SStefan Weinhuber 3698e09f215SStefan Weinhuber if ((basepriv->rdc_data.cu_type == 0x2105 || 3708e09f215SStefan Weinhuber basepriv->rdc_data.cu_type == 0x2107 || 3718e09f215SStefan Weinhuber basepriv->rdc_data.cu_type == 0x1750) 3728e09f215SStefan Weinhuber && !(basepriv->uses_cdl && trk < 2)) 3738e09f215SStefan Weinhuber data->ga_extended |= 0x40; /* Regular Data Format Mode */ 3748e09f215SStefan Weinhuber 3758e09f215SStefan Weinhuber geo.cyl = basepriv->rdc_data.no_cyl; 3768e09f215SStefan Weinhuber geo.head = basepriv->rdc_data.trk_per_cyl; 3778e09f215SStefan Weinhuber beg.cyl = trk / geo.head; 3788e09f215SStefan Weinhuber beg.head = trk % geo.head; 3798e09f215SStefan Weinhuber end.cyl = totrk / geo.head; 3808e09f215SStefan Weinhuber end.head = totrk % geo.head; 3818e09f215SStefan Weinhuber 3828e09f215SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 3838e09f215SStefan Weinhuber if (data->attributes.operation == DASD_SEQ_PRESTAGE || 3848e09f215SStefan Weinhuber data->attributes.operation == DASD_SEQ_ACCESS) { 3858e09f215SStefan Weinhuber 3868e09f215SStefan Weinhuber if (end.cyl + basepriv->attrib.nr_cyl < geo.cyl) 3878e09f215SStefan Weinhuber end.cyl += basepriv->attrib.nr_cyl; 3888e09f215SStefan Weinhuber else 3898e09f215SStefan Weinhuber end.cyl = (geo.cyl - 1); 3908e09f215SStefan Weinhuber } 3918e09f215SStefan Weinhuber 3928e09f215SStefan Weinhuber data->beg_ext.cyl = beg.cyl; 3938e09f215SStefan Weinhuber data->beg_ext.head = beg.head; 3948e09f215SStefan Weinhuber data->end_ext.cyl = end.cyl; 3958e09f215SStefan Weinhuber data->end_ext.head = end.head; 3968e09f215SStefan Weinhuber return rc; 3978e09f215SStefan Weinhuber } 3988e09f215SStefan Weinhuber 3994d284cacSHeiko Carstens static void 4001da177e4SLinus Torvalds locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, int trk, 4011da177e4SLinus Torvalds int rec_on_trk, int no_rec, int cmd, 4021da177e4SLinus Torvalds struct dasd_device * device, int reclen) 4031da177e4SLinus Torvalds { 4041da177e4SLinus Torvalds struct dasd_eckd_private *private; 4051da177e4SLinus Torvalds int sector; 4061da177e4SLinus Torvalds int dn, d; 4071da177e4SLinus Torvalds 4081da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 4091da177e4SLinus Torvalds 4101da177e4SLinus Torvalds DBF_DEV_EVENT(DBF_INFO, device, 4111da177e4SLinus Torvalds "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", 4121da177e4SLinus Torvalds trk, rec_on_trk, no_rec, cmd, reclen); 4131da177e4SLinus Torvalds 4141da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; 4151da177e4SLinus Torvalds ccw->flags = 0; 4161da177e4SLinus Torvalds ccw->count = 16; 4171da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 4181da177e4SLinus Torvalds 4191da177e4SLinus Torvalds memset(data, 0, sizeof(struct LO_eckd_data)); 4201da177e4SLinus Torvalds sector = 0; 4211da177e4SLinus Torvalds if (rec_on_trk) { 4221da177e4SLinus Torvalds switch (private->rdc_data.dev_type) { 4231da177e4SLinus Torvalds case 0x3390: 4241da177e4SLinus Torvalds dn = ceil_quot(reclen + 6, 232); 4251da177e4SLinus Torvalds d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 4261da177e4SLinus Torvalds sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 4271da177e4SLinus Torvalds break; 4281da177e4SLinus Torvalds case 0x3380: 4291da177e4SLinus Torvalds d = 7 + ceil_quot(reclen + 12, 32); 4301da177e4SLinus Torvalds sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 4311da177e4SLinus Torvalds break; 4321da177e4SLinus Torvalds } 4331da177e4SLinus Torvalds } 4341da177e4SLinus Torvalds data->sector = sector; 4351da177e4SLinus Torvalds data->count = no_rec; 4361da177e4SLinus Torvalds switch (cmd) { 4371da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 4381da177e4SLinus Torvalds data->operation.orientation = 0x3; 4391da177e4SLinus Torvalds data->operation.operation = 0x03; 4401da177e4SLinus Torvalds break; 4411da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 4421da177e4SLinus Torvalds data->operation.orientation = 0x3; 4431da177e4SLinus Torvalds data->operation.operation = 0x16; 4441da177e4SLinus Torvalds break; 4451da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 4461da177e4SLinus Torvalds data->operation.orientation = 0x1; 4471da177e4SLinus Torvalds data->operation.operation = 0x03; 4481da177e4SLinus Torvalds data->count++; 4491da177e4SLinus Torvalds break; 4501da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 4511da177e4SLinus Torvalds data->operation.orientation = 0x3; 4521da177e4SLinus Torvalds data->operation.operation = 0x16; 4531da177e4SLinus Torvalds data->count++; 4541da177e4SLinus Torvalds break; 4551da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 4561da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 4571da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 4581da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 4591da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 4601da177e4SLinus Torvalds data->length = reclen; 4611da177e4SLinus Torvalds data->operation.operation = 0x01; 4621da177e4SLinus Torvalds break; 4631da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 4641da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 4651da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 4661da177e4SLinus Torvalds data->length = reclen; 4671da177e4SLinus Torvalds data->operation.operation = 0x03; 4681da177e4SLinus Torvalds break; 4691da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 4701da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 4711da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 4721da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 4731da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 4741da177e4SLinus Torvalds data->length = reclen; 4751da177e4SLinus Torvalds data->operation.operation = 0x06; 4761da177e4SLinus Torvalds break; 4771da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 4781da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 4791da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 4801da177e4SLinus Torvalds data->length = reclen; 4811da177e4SLinus Torvalds data->operation.operation = 0x16; 4821da177e4SLinus Torvalds break; 4831da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_COUNT: 4841da177e4SLinus Torvalds data->operation.operation = 0x06; 4851da177e4SLinus Torvalds break; 4861da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 4871da177e4SLinus Torvalds data->length = reclen; 4881da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 4891da177e4SLinus Torvalds data->operation.operation = 0x0b; 4901da177e4SLinus Torvalds break; 4911da177e4SLinus Torvalds default: 4921da177e4SLinus Torvalds DEV_MESSAGE(KERN_ERR, device, "unknown opcode 0x%x", cmd); 4931da177e4SLinus Torvalds } 4941da177e4SLinus Torvalds data->seek_addr.cyl = data->search_arg.cyl = 4951da177e4SLinus Torvalds trk / private->rdc_data.trk_per_cyl; 4961da177e4SLinus Torvalds data->seek_addr.head = data->search_arg.head = 4971da177e4SLinus Torvalds trk % private->rdc_data.trk_per_cyl; 4981da177e4SLinus Torvalds data->search_arg.record = rec_on_trk; 4991da177e4SLinus Torvalds } 5001da177e4SLinus Torvalds 5011da177e4SLinus Torvalds /* 5021da177e4SLinus Torvalds * Returns 1 if the block is one of the special blocks that needs 5031da177e4SLinus Torvalds * to get read/written with the KD variant of the command. 5041da177e4SLinus Torvalds * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and 5051da177e4SLinus Torvalds * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. 5061da177e4SLinus Torvalds * Luckily the KD variants differ only by one bit (0x08) from the 5071da177e4SLinus Torvalds * normal variant. So don't wonder about code like: 5081da177e4SLinus Torvalds * if (dasd_eckd_cdl_special(blk_per_trk, recid)) 5091da177e4SLinus Torvalds * ccw->cmd_code |= 0x8; 5101da177e4SLinus Torvalds */ 5111da177e4SLinus Torvalds static inline int 5121da177e4SLinus Torvalds dasd_eckd_cdl_special(int blk_per_trk, int recid) 5131da177e4SLinus Torvalds { 5141da177e4SLinus Torvalds if (recid < 3) 5151da177e4SLinus Torvalds return 1; 5161da177e4SLinus Torvalds if (recid < blk_per_trk) 5171da177e4SLinus Torvalds return 0; 5181da177e4SLinus Torvalds if (recid < 2 * blk_per_trk) 5191da177e4SLinus Torvalds return 1; 5201da177e4SLinus Torvalds return 0; 5211da177e4SLinus Torvalds } 5221da177e4SLinus Torvalds 5231da177e4SLinus Torvalds /* 5241da177e4SLinus Torvalds * Returns the record size for the special blocks of the cdl format. 5251da177e4SLinus Torvalds * Only returns something useful if dasd_eckd_cdl_special is true 5261da177e4SLinus Torvalds * for the recid. 5271da177e4SLinus Torvalds */ 5281da177e4SLinus Torvalds static inline int 5291da177e4SLinus Torvalds dasd_eckd_cdl_reclen(int recid) 5301da177e4SLinus Torvalds { 5311da177e4SLinus Torvalds if (recid < 3) 5321da177e4SLinus Torvalds return sizes_trk0[recid]; 5331da177e4SLinus Torvalds return LABEL_SIZE; 5341da177e4SLinus Torvalds } 5351da177e4SLinus Torvalds 5363d052595SHorst Hummel /* 5373d052595SHorst Hummel * Generate device unique id that specifies the physical device. 5383d052595SHorst Hummel */ 5393d052595SHorst Hummel static int 5403d052595SHorst Hummel dasd_eckd_generate_uid(struct dasd_device *device, struct dasd_uid *uid) 5413d052595SHorst Hummel { 5423d052595SHorst Hummel struct dasd_eckd_private *private; 5433d052595SHorst Hummel struct dasd_eckd_confdata *confdata; 5443d052595SHorst Hummel 5453d052595SHorst Hummel private = (struct dasd_eckd_private *) device->private; 5463d052595SHorst Hummel if (!private) 5473d052595SHorst Hummel return -ENODEV; 5483d052595SHorst Hummel confdata = &private->conf_data; 5493d052595SHorst Hummel if (!confdata) 5503d052595SHorst Hummel return -ENODEV; 5513d052595SHorst Hummel 5523d052595SHorst Hummel memset(uid, 0, sizeof(struct dasd_uid)); 553d0710c7cSHorst Hummel memcpy(uid->vendor, confdata->ned1.HDA_manufacturer, 5543d052595SHorst Hummel sizeof(uid->vendor) - 1); 5553d052595SHorst Hummel EBCASC(uid->vendor, sizeof(uid->vendor) - 1); 556d0710c7cSHorst Hummel memcpy(uid->serial, confdata->ned1.HDA_location, 5573d052595SHorst Hummel sizeof(uid->serial) - 1); 5583d052595SHorst Hummel EBCASC(uid->serial, sizeof(uid->serial) - 1); 5593d052595SHorst Hummel uid->ssid = confdata->neq.subsystemID; 5608e09f215SStefan Weinhuber uid->real_unit_addr = confdata->ned1.unit_addr; 5618e09f215SStefan Weinhuber if (confdata->ned2.sneq.flags == 0x40 && 5628e09f215SStefan Weinhuber confdata->ned2.sneq.format == 0x0001) { 5638e09f215SStefan Weinhuber uid->type = confdata->ned2.sneq.sua_flags; 5648e09f215SStefan Weinhuber if (uid->type == UA_BASE_PAV_ALIAS) 5658e09f215SStefan Weinhuber uid->base_unit_addr = confdata->ned2.sneq.base_unit_addr; 5668e09f215SStefan Weinhuber } else { 5678e09f215SStefan Weinhuber uid->type = UA_BASE_DEVICE; 5688e09f215SStefan Weinhuber } 5693d052595SHorst Hummel return 0; 5703d052595SHorst Hummel } 5713d052595SHorst Hummel 572763968e2SHeiko Carstens static struct dasd_ccw_req *dasd_eckd_build_rcd_lpm(struct dasd_device *device, 57317283b56SCornelia Huck void *rcd_buffer, 57417283b56SCornelia Huck struct ciw *ciw, __u8 lpm) 57517283b56SCornelia Huck { 57617283b56SCornelia Huck struct dasd_ccw_req *cqr; 57717283b56SCornelia Huck struct ccw1 *ccw; 57817283b56SCornelia Huck 57917283b56SCornelia Huck cqr = dasd_smalloc_request("ECKD", 1 /* RCD */, ciw->count, device); 58017283b56SCornelia Huck 58117283b56SCornelia Huck if (IS_ERR(cqr)) { 58217283b56SCornelia Huck DEV_MESSAGE(KERN_WARNING, device, "%s", 58317283b56SCornelia Huck "Could not allocate RCD request"); 58417283b56SCornelia Huck return cqr; 58517283b56SCornelia Huck } 58617283b56SCornelia Huck 58717283b56SCornelia Huck ccw = cqr->cpaddr; 58817283b56SCornelia Huck ccw->cmd_code = ciw->cmd; 58917283b56SCornelia Huck ccw->cda = (__u32)(addr_t)rcd_buffer; 59017283b56SCornelia Huck ccw->count = ciw->count; 59117283b56SCornelia Huck 5928e09f215SStefan Weinhuber cqr->startdev = device; 5938e09f215SStefan Weinhuber cqr->memdev = device; 5948e09f215SStefan Weinhuber cqr->block = NULL; 59517283b56SCornelia Huck cqr->expires = 10*HZ; 59617283b56SCornelia Huck cqr->lpm = lpm; 59717283b56SCornelia Huck clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 59817283b56SCornelia Huck cqr->retries = 2; 59917283b56SCornelia Huck cqr->buildclk = get_clock(); 60017283b56SCornelia Huck cqr->status = DASD_CQR_FILLED; 60117283b56SCornelia Huck return cqr; 60217283b56SCornelia Huck } 60317283b56SCornelia Huck 60417283b56SCornelia Huck static int dasd_eckd_read_conf_lpm(struct dasd_device *device, 60517283b56SCornelia Huck void **rcd_buffer, 60617283b56SCornelia Huck int *rcd_buffer_size, __u8 lpm) 60717283b56SCornelia Huck { 60817283b56SCornelia Huck struct ciw *ciw; 60917283b56SCornelia Huck char *rcd_buf = NULL; 61017283b56SCornelia Huck int ret; 61117283b56SCornelia Huck struct dasd_ccw_req *cqr; 61217283b56SCornelia Huck 61317283b56SCornelia Huck /* 61417283b56SCornelia Huck * scan for RCD command in extended SenseID data 61517283b56SCornelia Huck */ 61617283b56SCornelia Huck ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 61717283b56SCornelia Huck if (!ciw || ciw->cmd == 0) { 61817283b56SCornelia Huck ret = -EOPNOTSUPP; 61917283b56SCornelia Huck goto out_error; 62017283b56SCornelia Huck } 62117283b56SCornelia Huck rcd_buf = kzalloc(ciw->count, GFP_KERNEL | GFP_DMA); 62217283b56SCornelia Huck if (!rcd_buf) { 62317283b56SCornelia Huck ret = -ENOMEM; 62417283b56SCornelia Huck goto out_error; 62517283b56SCornelia Huck } 62617283b56SCornelia Huck cqr = dasd_eckd_build_rcd_lpm(device, rcd_buf, ciw, lpm); 62717283b56SCornelia Huck if (IS_ERR(cqr)) { 62817283b56SCornelia Huck ret = PTR_ERR(cqr); 62917283b56SCornelia Huck goto out_error; 63017283b56SCornelia Huck } 63117283b56SCornelia Huck ret = dasd_sleep_on(cqr); 63217283b56SCornelia Huck /* 63317283b56SCornelia Huck * on success we update the user input parms 63417283b56SCornelia Huck */ 6358e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 63617283b56SCornelia Huck if (ret) 63717283b56SCornelia Huck goto out_error; 63817283b56SCornelia Huck 63917283b56SCornelia Huck *rcd_buffer_size = ciw->count; 64017283b56SCornelia Huck *rcd_buffer = rcd_buf; 64117283b56SCornelia Huck return 0; 64217283b56SCornelia Huck out_error: 64317283b56SCornelia Huck kfree(rcd_buf); 64417283b56SCornelia Huck *rcd_buffer = NULL; 64517283b56SCornelia Huck *rcd_buffer_size = 0; 64617283b56SCornelia Huck return ret; 64717283b56SCornelia Huck } 64817283b56SCornelia Huck 6491da177e4SLinus Torvalds static int 6501da177e4SLinus Torvalds dasd_eckd_read_conf(struct dasd_device *device) 6511da177e4SLinus Torvalds { 6521da177e4SLinus Torvalds void *conf_data; 6531da177e4SLinus Torvalds int conf_len, conf_data_saved; 6541da177e4SLinus Torvalds int rc; 6551da177e4SLinus Torvalds __u8 lpm; 6561da177e4SLinus Torvalds struct dasd_eckd_private *private; 6571da177e4SLinus Torvalds struct dasd_eckd_path *path_data; 6581da177e4SLinus Torvalds 6591da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 6601da177e4SLinus Torvalds path_data = (struct dasd_eckd_path *) &private->path_data; 6611da177e4SLinus Torvalds path_data->opm = ccw_device_get_path_mask(device->cdev); 6621da177e4SLinus Torvalds lpm = 0x80; 6631da177e4SLinus Torvalds conf_data_saved = 0; 6641da177e4SLinus Torvalds 6651da177e4SLinus Torvalds /* get configuration data per operational path */ 6661da177e4SLinus Torvalds for (lpm = 0x80; lpm; lpm>>= 1) { 6671da177e4SLinus Torvalds if (lpm & path_data->opm){ 66817283b56SCornelia Huck rc = dasd_eckd_read_conf_lpm(device, &conf_data, 6691da177e4SLinus Torvalds &conf_len, lpm); 6701da177e4SLinus Torvalds if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ 6711da177e4SLinus Torvalds MESSAGE(KERN_WARNING, 6721da177e4SLinus Torvalds "Read configuration data returned " 6731da177e4SLinus Torvalds "error %d", rc); 6741da177e4SLinus Torvalds return rc; 6751da177e4SLinus Torvalds } 6761da177e4SLinus Torvalds if (conf_data == NULL) { 6771da177e4SLinus Torvalds MESSAGE(KERN_WARNING, "%s", "No configuration " 6781da177e4SLinus Torvalds "data retrieved"); 679d133a960SGabriel Craciunescu continue; /* no error */ 6801da177e4SLinus Torvalds } 6811da177e4SLinus Torvalds if (conf_len != sizeof(struct dasd_eckd_confdata)) { 6821da177e4SLinus Torvalds MESSAGE(KERN_WARNING, 6831da177e4SLinus Torvalds "sizes of configuration data mismatch" 6841da177e4SLinus Torvalds "%d (read) vs %ld (expected)", 6851da177e4SLinus Torvalds conf_len, 6861da177e4SLinus Torvalds sizeof(struct dasd_eckd_confdata)); 6871da177e4SLinus Torvalds kfree(conf_data); 688d133a960SGabriel Craciunescu continue; /* no error */ 6891da177e4SLinus Torvalds } 6901da177e4SLinus Torvalds /* save first valid configuration data */ 6911da177e4SLinus Torvalds if (!conf_data_saved){ 6921da177e4SLinus Torvalds memcpy(&private->conf_data, conf_data, 6931da177e4SLinus Torvalds sizeof(struct dasd_eckd_confdata)); 6941da177e4SLinus Torvalds conf_data_saved++; 6951da177e4SLinus Torvalds } 6961da177e4SLinus Torvalds switch (((char *)conf_data)[242] & 0x07){ 6971da177e4SLinus Torvalds case 0x02: 6981da177e4SLinus Torvalds path_data->npm |= lpm; 6991da177e4SLinus Torvalds break; 7001da177e4SLinus Torvalds case 0x03: 7011da177e4SLinus Torvalds path_data->ppm |= lpm; 7021da177e4SLinus Torvalds break; 7031da177e4SLinus Torvalds } 7041da177e4SLinus Torvalds kfree(conf_data); 7051da177e4SLinus Torvalds } 7061da177e4SLinus Torvalds } 7071da177e4SLinus Torvalds return 0; 7081da177e4SLinus Torvalds } 7091da177e4SLinus Torvalds 7108e09f215SStefan Weinhuber static int dasd_eckd_read_features(struct dasd_device *device) 7118e09f215SStefan Weinhuber { 7128e09f215SStefan Weinhuber struct dasd_psf_prssd_data *prssdp; 7138e09f215SStefan Weinhuber struct dasd_rssd_features *features; 7148e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 7158e09f215SStefan Weinhuber struct ccw1 *ccw; 7168e09f215SStefan Weinhuber int rc; 7178e09f215SStefan Weinhuber struct dasd_eckd_private *private; 7188e09f215SStefan Weinhuber 7198e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 7208e09f215SStefan Weinhuber cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 7218e09f215SStefan Weinhuber 1 /* PSF */ + 1 /* RSSD */ , 7228e09f215SStefan Weinhuber (sizeof(struct dasd_psf_prssd_data) + 7238e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)), 7248e09f215SStefan Weinhuber device); 7258e09f215SStefan Weinhuber if (IS_ERR(cqr)) { 7268e09f215SStefan Weinhuber DEV_MESSAGE(KERN_WARNING, device, "%s", 7278e09f215SStefan Weinhuber "Could not allocate initialization request"); 7288e09f215SStefan Weinhuber return PTR_ERR(cqr); 7298e09f215SStefan Weinhuber } 7308e09f215SStefan Weinhuber cqr->startdev = device; 7318e09f215SStefan Weinhuber cqr->memdev = device; 7328e09f215SStefan Weinhuber cqr->block = NULL; 7338e09f215SStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 7348e09f215SStefan Weinhuber cqr->retries = 5; 7358e09f215SStefan Weinhuber cqr->expires = 10 * HZ; 7368e09f215SStefan Weinhuber 7378e09f215SStefan Weinhuber /* Prepare for Read Subsystem Data */ 7388e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 7398e09f215SStefan Weinhuber memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 7408e09f215SStefan Weinhuber prssdp->order = PSF_ORDER_PRSSD; 7418e09f215SStefan Weinhuber prssdp->suborder = 0x41; /* Read Feature Codes */ 7428e09f215SStefan Weinhuber /* all other bytes of prssdp must be zero */ 7438e09f215SStefan Weinhuber 7448e09f215SStefan Weinhuber ccw = cqr->cpaddr; 7458e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PSF; 7468e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_psf_prssd_data); 7478e09f215SStefan Weinhuber ccw->flags |= CCW_FLAG_CC; 7488e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) prssdp; 7498e09f215SStefan Weinhuber 7508e09f215SStefan Weinhuber /* Read Subsystem Data - feature codes */ 7518e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 7528e09f215SStefan Weinhuber memset(features, 0, sizeof(struct dasd_rssd_features)); 7538e09f215SStefan Weinhuber 7548e09f215SStefan Weinhuber ccw++; 7558e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RSSD; 7568e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_rssd_features); 7578e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) features; 7588e09f215SStefan Weinhuber 7598e09f215SStefan Weinhuber cqr->buildclk = get_clock(); 7608e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 7618e09f215SStefan Weinhuber rc = dasd_sleep_on(cqr); 7628e09f215SStefan Weinhuber if (rc == 0) { 7638e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 7648e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 7658e09f215SStefan Weinhuber memcpy(&private->features, features, 7668e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)); 7678e09f215SStefan Weinhuber } 7688e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 7698e09f215SStefan Weinhuber return rc; 7708e09f215SStefan Weinhuber } 7718e09f215SStefan Weinhuber 7728e09f215SStefan Weinhuber 7733d052595SHorst Hummel /* 77440545573SHorst Hummel * Build CP for Perform Subsystem Function - SSC. 77540545573SHorst Hummel */ 7768e09f215SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device) 77740545573SHorst Hummel { 77840545573SHorst Hummel struct dasd_ccw_req *cqr; 77940545573SHorst Hummel struct dasd_psf_ssc_data *psf_ssc_data; 78040545573SHorst Hummel struct ccw1 *ccw; 78140545573SHorst Hummel 78240545573SHorst Hummel cqr = dasd_smalloc_request("ECKD", 1 /* PSF */ , 78340545573SHorst Hummel sizeof(struct dasd_psf_ssc_data), 78440545573SHorst Hummel device); 78540545573SHorst Hummel 78640545573SHorst Hummel if (IS_ERR(cqr)) { 78740545573SHorst Hummel DEV_MESSAGE(KERN_WARNING, device, "%s", 78840545573SHorst Hummel "Could not allocate PSF-SSC request"); 78940545573SHorst Hummel return cqr; 79040545573SHorst Hummel } 79140545573SHorst Hummel psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 79240545573SHorst Hummel psf_ssc_data->order = PSF_ORDER_SSC; 7938e09f215SStefan Weinhuber psf_ssc_data->suborder = 0x88; 7948e09f215SStefan Weinhuber psf_ssc_data->reserved[0] = 0x88; 79540545573SHorst Hummel 79640545573SHorst Hummel ccw = cqr->cpaddr; 79740545573SHorst Hummel ccw->cmd_code = DASD_ECKD_CCW_PSF; 79840545573SHorst Hummel ccw->cda = (__u32)(addr_t)psf_ssc_data; 79940545573SHorst Hummel ccw->count = 66; 80040545573SHorst Hummel 8018e09f215SStefan Weinhuber cqr->startdev = device; 8028e09f215SStefan Weinhuber cqr->memdev = device; 8038e09f215SStefan Weinhuber cqr->block = NULL; 80440545573SHorst Hummel cqr->expires = 10*HZ; 80540545573SHorst Hummel cqr->buildclk = get_clock(); 80640545573SHorst Hummel cqr->status = DASD_CQR_FILLED; 80740545573SHorst Hummel return cqr; 80840545573SHorst Hummel } 80940545573SHorst Hummel 81040545573SHorst Hummel /* 81140545573SHorst Hummel * Perform Subsystem Function. 81240545573SHorst Hummel * It is necessary to trigger CIO for channel revalidation since this 81340545573SHorst Hummel * call might change behaviour of DASD devices. 81440545573SHorst Hummel */ 81540545573SHorst Hummel static int 81640545573SHorst Hummel dasd_eckd_psf_ssc(struct dasd_device *device) 81740545573SHorst Hummel { 81840545573SHorst Hummel struct dasd_ccw_req *cqr; 81940545573SHorst Hummel int rc; 82040545573SHorst Hummel 82140545573SHorst Hummel cqr = dasd_eckd_build_psf_ssc(device); 82240545573SHorst Hummel if (IS_ERR(cqr)) 82340545573SHorst Hummel return PTR_ERR(cqr); 82440545573SHorst Hummel 82540545573SHorst Hummel rc = dasd_sleep_on(cqr); 82640545573SHorst Hummel if (!rc) 82740545573SHorst Hummel /* trigger CIO to reprobe devices */ 82840545573SHorst Hummel css_schedule_reprobe(); 8298e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 83040545573SHorst Hummel return rc; 83140545573SHorst Hummel } 83240545573SHorst Hummel 83340545573SHorst Hummel /* 83440545573SHorst Hummel * Valide storage server of current device. 83540545573SHorst Hummel */ 8368e09f215SStefan Weinhuber static int dasd_eckd_validate_server(struct dasd_device *device) 83740545573SHorst Hummel { 83840545573SHorst Hummel int rc; 8398e09f215SStefan Weinhuber struct dasd_eckd_private *private; 84040545573SHorst Hummel 84140545573SHorst Hummel /* Currently PAV is the only reason to 'validate' server on LPAR */ 84240545573SHorst Hummel if (dasd_nopav || MACHINE_IS_VM) 84340545573SHorst Hummel return 0; 84440545573SHorst Hummel 84540545573SHorst Hummel rc = dasd_eckd_psf_ssc(device); 84640545573SHorst Hummel /* may be requested feature is not available on server, 84740545573SHorst Hummel * therefore just report error and go ahead */ 8488e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 84940545573SHorst Hummel DEV_MESSAGE(KERN_INFO, device, 8508e79a441SHorst Hummel "PSF-SSC on storage subsystem %s.%s.%04x returned rc=%d", 8518e09f215SStefan Weinhuber private->uid.vendor, private->uid.serial, 8528e09f215SStefan Weinhuber private->uid.ssid, rc); 85340545573SHorst Hummel /* RE-Read Configuration Data */ 85440545573SHorst Hummel return dasd_eckd_read_conf(device); 85540545573SHorst Hummel } 85640545573SHorst Hummel 85740545573SHorst Hummel /* 8583d052595SHorst Hummel * Check device characteristics. 8593d052595SHorst Hummel * If the device is accessible using ECKD discipline, the device is enabled. 8603d052595SHorst Hummel */ 8611da177e4SLinus Torvalds static int 8621da177e4SLinus Torvalds dasd_eckd_check_characteristics(struct dasd_device *device) 8631da177e4SLinus Torvalds { 8641da177e4SLinus Torvalds struct dasd_eckd_private *private; 8658e09f215SStefan Weinhuber struct dasd_block *block; 8661da177e4SLinus Torvalds void *rdc_data; 8678e09f215SStefan Weinhuber int is_known, rc; 8681da177e4SLinus Torvalds 8691da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 8701da177e4SLinus Torvalds if (private == NULL) { 871138c014dSHorst Hummel private = kzalloc(sizeof(struct dasd_eckd_private), 8721da177e4SLinus Torvalds GFP_KERNEL | GFP_DMA); 8731da177e4SLinus Torvalds if (private == NULL) { 8741da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 8751da177e4SLinus Torvalds "memory allocation failed for private " 8761da177e4SLinus Torvalds "data"); 8771da177e4SLinus Torvalds return -ENOMEM; 8781da177e4SLinus Torvalds } 8791da177e4SLinus Torvalds device->private = (void *) private; 8801da177e4SLinus Torvalds } 8811da177e4SLinus Torvalds /* Invalidate status of initial analysis. */ 8821da177e4SLinus Torvalds private->init_cqr_status = -1; 8831da177e4SLinus Torvalds /* Set default cache operations. */ 8841da177e4SLinus Torvalds private->attrib.operation = DASD_NORMAL_CACHE; 8851da177e4SLinus Torvalds private->attrib.nr_cyl = 0; 8861da177e4SLinus Torvalds 88740545573SHorst Hummel /* Read Configuration Data */ 88840545573SHorst Hummel rc = dasd_eckd_read_conf(device); 88940545573SHorst Hummel if (rc) 8908e09f215SStefan Weinhuber goto out_err1; 89140545573SHorst Hummel 89240545573SHorst Hummel /* Generate device unique id and register in devmap */ 8938e09f215SStefan Weinhuber rc = dasd_eckd_generate_uid(device, &private->uid); 89440545573SHorst Hummel if (rc) 8958e09f215SStefan Weinhuber goto out_err1; 8968e09f215SStefan Weinhuber dasd_set_uid(device->cdev, &private->uid); 8978e09f215SStefan Weinhuber 8988e09f215SStefan Weinhuber if (private->uid.type == UA_BASE_DEVICE) { 8998e09f215SStefan Weinhuber block = dasd_alloc_block(); 9008e09f215SStefan Weinhuber if (IS_ERR(block)) { 9018e09f215SStefan Weinhuber DEV_MESSAGE(KERN_WARNING, device, "%s", 9028e09f215SStefan Weinhuber "could not allocate dasd block structure"); 9038e09f215SStefan Weinhuber rc = PTR_ERR(block); 9048e09f215SStefan Weinhuber goto out_err1; 9058e09f215SStefan Weinhuber } 9068e09f215SStefan Weinhuber device->block = block; 9078e09f215SStefan Weinhuber block->base = device; 9088e09f215SStefan Weinhuber } 9098e09f215SStefan Weinhuber 9108e09f215SStefan Weinhuber /* register lcu with alias handling, enable PAV if this is a new lcu */ 9118e09f215SStefan Weinhuber is_known = dasd_alias_make_device_known_to_lcu(device); 9128e09f215SStefan Weinhuber if (is_known < 0) { 9138e09f215SStefan Weinhuber rc = is_known; 9148e09f215SStefan Weinhuber goto out_err2; 9158e09f215SStefan Weinhuber } 9168e09f215SStefan Weinhuber if (!is_known) { 9178e09f215SStefan Weinhuber /* new lcu found */ 9188e09f215SStefan Weinhuber rc = dasd_eckd_validate_server(device); /* will switch pav on */ 91940545573SHorst Hummel if (rc) 9208e09f215SStefan Weinhuber goto out_err3; 9218e09f215SStefan Weinhuber } 9228e09f215SStefan Weinhuber 9238e09f215SStefan Weinhuber /* Read Feature Codes */ 9248e09f215SStefan Weinhuber rc = dasd_eckd_read_features(device); 9258e09f215SStefan Weinhuber if (rc) 9268e09f215SStefan Weinhuber goto out_err3; 92740545573SHorst Hummel 9281da177e4SLinus Torvalds /* Read Device Characteristics */ 9291da177e4SLinus Torvalds rdc_data = (void *) &(private->rdc_data); 9303d052595SHorst Hummel memset(rdc_data, 0, sizeof(rdc_data)); 93117283b56SCornelia Huck rc = dasd_generic_read_dev_chars(device, "ECKD", &rdc_data, 64); 9328e09f215SStefan Weinhuber if (rc) { 9331da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, 93440545573SHorst Hummel "Read device characteristics returned " 93540545573SHorst Hummel "rc=%d", rc); 9368e09f215SStefan Weinhuber goto out_err3; 9378e09f215SStefan Weinhuber } 9381da177e4SLinus Torvalds DEV_MESSAGE(KERN_INFO, device, 9391da177e4SLinus Torvalds "%04X/%02X(CU:%04X/%02X) Cyl:%d Head:%d Sec:%d", 9401da177e4SLinus Torvalds private->rdc_data.dev_type, 9411da177e4SLinus Torvalds private->rdc_data.dev_model, 9421da177e4SLinus Torvalds private->rdc_data.cu_type, 9431da177e4SLinus Torvalds private->rdc_data.cu_model.model, 9441da177e4SLinus Torvalds private->rdc_data.no_cyl, 9451da177e4SLinus Torvalds private->rdc_data.trk_per_cyl, 9461da177e4SLinus Torvalds private->rdc_data.sec_per_trk); 9478e09f215SStefan Weinhuber return 0; 9488e09f215SStefan Weinhuber 9498e09f215SStefan Weinhuber out_err3: 9508e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 9518e09f215SStefan Weinhuber out_err2: 9528e09f215SStefan Weinhuber dasd_free_block(device->block); 9538e09f215SStefan Weinhuber device->block = NULL; 9548e09f215SStefan Weinhuber out_err1: 9558e09f215SStefan Weinhuber kfree(device->private); 9568e09f215SStefan Weinhuber device->private = NULL; 9573d052595SHorst Hummel return rc; 9581da177e4SLinus Torvalds } 9591da177e4SLinus Torvalds 9608e09f215SStefan Weinhuber static void dasd_eckd_uncheck_device(struct dasd_device *device) 9618e09f215SStefan Weinhuber { 9628e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 9638e09f215SStefan Weinhuber } 9648e09f215SStefan Weinhuber 9651da177e4SLinus Torvalds static struct dasd_ccw_req * 9661da177e4SLinus Torvalds dasd_eckd_analysis_ccw(struct dasd_device *device) 9671da177e4SLinus Torvalds { 9681da177e4SLinus Torvalds struct dasd_eckd_private *private; 9691da177e4SLinus Torvalds struct eckd_count *count_data; 9701da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 9711da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 9721da177e4SLinus Torvalds struct ccw1 *ccw; 9731da177e4SLinus Torvalds int cplength, datasize; 9741da177e4SLinus Torvalds int i; 9751da177e4SLinus Torvalds 9761da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 9771da177e4SLinus Torvalds 9781da177e4SLinus Torvalds cplength = 8; 9791da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 9801da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 9811da177e4SLinus Torvalds cplength, datasize, device); 9821da177e4SLinus Torvalds if (IS_ERR(cqr)) 9831da177e4SLinus Torvalds return cqr; 9841da177e4SLinus Torvalds ccw = cqr->cpaddr; 9851da177e4SLinus Torvalds /* Define extent for the first 3 tracks. */ 9861da177e4SLinus Torvalds define_extent(ccw++, cqr->data, 0, 2, 9871da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device); 9881da177e4SLinus Torvalds LO_data = cqr->data + sizeof(struct DE_eckd_data); 9891da177e4SLinus Torvalds /* Locate record for the first 4 records on track 0. */ 9901da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 9911da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 0, 0, 4, 9921da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 9931da177e4SLinus Torvalds 9941da177e4SLinus Torvalds count_data = private->count_area; 9951da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 9961da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 9971da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 9981da177e4SLinus Torvalds ccw->flags = 0; 9991da177e4SLinus Torvalds ccw->count = 8; 10001da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 10011da177e4SLinus Torvalds ccw++; 10021da177e4SLinus Torvalds count_data++; 10031da177e4SLinus Torvalds } 10041da177e4SLinus Torvalds 10051da177e4SLinus Torvalds /* Locate record for the first record on track 2. */ 10061da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 10071da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 2, 0, 1, 10081da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 10091da177e4SLinus Torvalds /* Read count ccw. */ 10101da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 10111da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 10121da177e4SLinus Torvalds ccw->flags = 0; 10131da177e4SLinus Torvalds ccw->count = 8; 10141da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 10151da177e4SLinus Torvalds 10168e09f215SStefan Weinhuber cqr->block = NULL; 10178e09f215SStefan Weinhuber cqr->startdev = device; 10188e09f215SStefan Weinhuber cqr->memdev = device; 10191da177e4SLinus Torvalds cqr->retries = 0; 10201da177e4SLinus Torvalds cqr->buildclk = get_clock(); 10211da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 10221da177e4SLinus Torvalds return cqr; 10231da177e4SLinus Torvalds } 10241da177e4SLinus Torvalds 10251da177e4SLinus Torvalds /* 10261da177e4SLinus Torvalds * This is the callback function for the init_analysis cqr. It saves 10271da177e4SLinus Torvalds * the status of the initial analysis ccw before it frees it and kicks 10281da177e4SLinus Torvalds * the device to continue the startup sequence. This will call 10291da177e4SLinus Torvalds * dasd_eckd_do_analysis again (if the devices has not been marked 10301da177e4SLinus Torvalds * for deletion in the meantime). 10311da177e4SLinus Torvalds */ 10321da177e4SLinus Torvalds static void 10331da177e4SLinus Torvalds dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, void *data) 10341da177e4SLinus Torvalds { 10351da177e4SLinus Torvalds struct dasd_eckd_private *private; 10361da177e4SLinus Torvalds struct dasd_device *device; 10371da177e4SLinus Torvalds 10388e09f215SStefan Weinhuber device = init_cqr->startdev; 10391da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 10401da177e4SLinus Torvalds private->init_cqr_status = init_cqr->status; 10411da177e4SLinus Torvalds dasd_sfree_request(init_cqr, device); 10421da177e4SLinus Torvalds dasd_kick_device(device); 10431da177e4SLinus Torvalds } 10441da177e4SLinus Torvalds 10451da177e4SLinus Torvalds static int 10468e09f215SStefan Weinhuber dasd_eckd_start_analysis(struct dasd_block *block) 10471da177e4SLinus Torvalds { 10481da177e4SLinus Torvalds struct dasd_eckd_private *private; 10491da177e4SLinus Torvalds struct dasd_ccw_req *init_cqr; 10501da177e4SLinus Torvalds 10518e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 10528e09f215SStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(block->base); 10531da177e4SLinus Torvalds if (IS_ERR(init_cqr)) 10541da177e4SLinus Torvalds return PTR_ERR(init_cqr); 10551da177e4SLinus Torvalds init_cqr->callback = dasd_eckd_analysis_callback; 10561da177e4SLinus Torvalds init_cqr->callback_data = NULL; 10571da177e4SLinus Torvalds init_cqr->expires = 5*HZ; 10581da177e4SLinus Torvalds dasd_add_request_head(init_cqr); 10591da177e4SLinus Torvalds return -EAGAIN; 10601da177e4SLinus Torvalds } 10611da177e4SLinus Torvalds 10621da177e4SLinus Torvalds static int 10638e09f215SStefan Weinhuber dasd_eckd_end_analysis(struct dasd_block *block) 10641da177e4SLinus Torvalds { 10658e09f215SStefan Weinhuber struct dasd_device *device; 10661da177e4SLinus Torvalds struct dasd_eckd_private *private; 10671da177e4SLinus Torvalds struct eckd_count *count_area; 10681da177e4SLinus Torvalds unsigned int sb, blk_per_trk; 10691da177e4SLinus Torvalds int status, i; 10701da177e4SLinus Torvalds 10718e09f215SStefan Weinhuber device = block->base; 10721da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 10731da177e4SLinus Torvalds status = private->init_cqr_status; 10741da177e4SLinus Torvalds private->init_cqr_status = -1; 10751da177e4SLinus Torvalds if (status != DASD_CQR_DONE) { 10761da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 10771da177e4SLinus Torvalds "volume analysis returned unformatted disk"); 10781da177e4SLinus Torvalds return -EMEDIUMTYPE; 10791da177e4SLinus Torvalds } 10801da177e4SLinus Torvalds 10811da177e4SLinus Torvalds private->uses_cdl = 1; 10821da177e4SLinus Torvalds /* Calculate number of blocks/records per track. */ 10838e09f215SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 10841da177e4SLinus Torvalds /* Check Track 0 for Compatible Disk Layout */ 10851da177e4SLinus Torvalds count_area = NULL; 10861da177e4SLinus Torvalds for (i = 0; i < 3; i++) { 10871da177e4SLinus Torvalds if (private->count_area[i].kl != 4 || 10881da177e4SLinus Torvalds private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4) { 10891da177e4SLinus Torvalds private->uses_cdl = 0; 10901da177e4SLinus Torvalds break; 10911da177e4SLinus Torvalds } 10921da177e4SLinus Torvalds } 10931da177e4SLinus Torvalds if (i == 3) 10941da177e4SLinus Torvalds count_area = &private->count_area[4]; 10951da177e4SLinus Torvalds 10961da177e4SLinus Torvalds if (private->uses_cdl == 0) { 10971da177e4SLinus Torvalds for (i = 0; i < 5; i++) { 10981da177e4SLinus Torvalds if ((private->count_area[i].kl != 0) || 10991da177e4SLinus Torvalds (private->count_area[i].dl != 11001da177e4SLinus Torvalds private->count_area[0].dl)) 11011da177e4SLinus Torvalds break; 11021da177e4SLinus Torvalds } 11031da177e4SLinus Torvalds if (i == 5) 11041da177e4SLinus Torvalds count_area = &private->count_area[0]; 11051da177e4SLinus Torvalds } else { 11061da177e4SLinus Torvalds if (private->count_area[3].record == 1) 11071da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 11081da177e4SLinus Torvalds "Trk 0: no records after VTOC!"); 11091da177e4SLinus Torvalds } 11101da177e4SLinus Torvalds if (count_area != NULL && count_area->kl == 0) { 11111da177e4SLinus Torvalds /* we found notthing violating our disk layout */ 11121da177e4SLinus Torvalds if (dasd_check_blocksize(count_area->dl) == 0) 11138e09f215SStefan Weinhuber block->bp_block = count_area->dl; 11141da177e4SLinus Torvalds } 11158e09f215SStefan Weinhuber if (block->bp_block == 0) { 11161da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 11171da177e4SLinus Torvalds "Volume has incompatible disk layout"); 11181da177e4SLinus Torvalds return -EMEDIUMTYPE; 11191da177e4SLinus Torvalds } 11208e09f215SStefan Weinhuber block->s2b_shift = 0; /* bits to shift 512 to get a block */ 11218e09f215SStefan Weinhuber for (sb = 512; sb < block->bp_block; sb = sb << 1) 11228e09f215SStefan Weinhuber block->s2b_shift++; 11231da177e4SLinus Torvalds 11248e09f215SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 11258e09f215SStefan Weinhuber block->blocks = (private->rdc_data.no_cyl * 11261da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 11271da177e4SLinus Torvalds blk_per_trk); 11281da177e4SLinus Torvalds 11291da177e4SLinus Torvalds DEV_MESSAGE(KERN_INFO, device, 11301da177e4SLinus Torvalds "(%dkB blks): %dkB at %dkB/trk %s", 11318e09f215SStefan Weinhuber (block->bp_block >> 10), 11321da177e4SLinus Torvalds ((private->rdc_data.no_cyl * 11331da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 11348e09f215SStefan Weinhuber blk_per_trk * (block->bp_block >> 9)) >> 1), 11358e09f215SStefan Weinhuber ((blk_per_trk * block->bp_block) >> 10), 11361da177e4SLinus Torvalds private->uses_cdl ? 11371da177e4SLinus Torvalds "compatible disk layout" : "linux disk layout"); 11381da177e4SLinus Torvalds 11391da177e4SLinus Torvalds return 0; 11401da177e4SLinus Torvalds } 11411da177e4SLinus Torvalds 11428e09f215SStefan Weinhuber static int dasd_eckd_do_analysis(struct dasd_block *block) 11431da177e4SLinus Torvalds { 11441da177e4SLinus Torvalds struct dasd_eckd_private *private; 11451da177e4SLinus Torvalds 11468e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 11471da177e4SLinus Torvalds if (private->init_cqr_status < 0) 11488e09f215SStefan Weinhuber return dasd_eckd_start_analysis(block); 11491da177e4SLinus Torvalds else 11508e09f215SStefan Weinhuber return dasd_eckd_end_analysis(block); 11511da177e4SLinus Torvalds } 11521da177e4SLinus Torvalds 11538e09f215SStefan Weinhuber static int dasd_eckd_ready_to_online(struct dasd_device *device) 11548e09f215SStefan Weinhuber { 11558e09f215SStefan Weinhuber return dasd_alias_add_device(device); 11568e09f215SStefan Weinhuber }; 11578e09f215SStefan Weinhuber 11588e09f215SStefan Weinhuber static int dasd_eckd_online_to_ready(struct dasd_device *device) 11598e09f215SStefan Weinhuber { 11608e09f215SStefan Weinhuber return dasd_alias_remove_device(device); 11618e09f215SStefan Weinhuber }; 11628e09f215SStefan Weinhuber 11631da177e4SLinus Torvalds static int 11648e09f215SStefan Weinhuber dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 11651da177e4SLinus Torvalds { 11661da177e4SLinus Torvalds struct dasd_eckd_private *private; 11671da177e4SLinus Torvalds 11688e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 11698e09f215SStefan Weinhuber if (dasd_check_blocksize(block->bp_block) == 0) { 11701da177e4SLinus Torvalds geo->sectors = recs_per_track(&private->rdc_data, 11718e09f215SStefan Weinhuber 0, block->bp_block); 11721da177e4SLinus Torvalds } 11731da177e4SLinus Torvalds geo->cylinders = private->rdc_data.no_cyl; 11741da177e4SLinus Torvalds geo->heads = private->rdc_data.trk_per_cyl; 11751da177e4SLinus Torvalds return 0; 11761da177e4SLinus Torvalds } 11771da177e4SLinus Torvalds 11781da177e4SLinus Torvalds static struct dasd_ccw_req * 11791da177e4SLinus Torvalds dasd_eckd_format_device(struct dasd_device * device, 11801da177e4SLinus Torvalds struct format_data_t * fdata) 11811da177e4SLinus Torvalds { 11821da177e4SLinus Torvalds struct dasd_eckd_private *private; 11831da177e4SLinus Torvalds struct dasd_ccw_req *fcp; 11841da177e4SLinus Torvalds struct eckd_count *ect; 11851da177e4SLinus Torvalds struct ccw1 *ccw; 11861da177e4SLinus Torvalds void *data; 11871da177e4SLinus Torvalds int rpt, cyl, head; 11881da177e4SLinus Torvalds int cplength, datasize; 11891da177e4SLinus Torvalds int i; 11901da177e4SLinus Torvalds 11911da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 11921da177e4SLinus Torvalds rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize); 11931da177e4SLinus Torvalds cyl = fdata->start_unit / private->rdc_data.trk_per_cyl; 11941da177e4SLinus Torvalds head = fdata->start_unit % private->rdc_data.trk_per_cyl; 11951da177e4SLinus Torvalds 11961da177e4SLinus Torvalds /* Sanity checks. */ 11971da177e4SLinus Torvalds if (fdata->start_unit >= 11981da177e4SLinus Torvalds (private->rdc_data.no_cyl * private->rdc_data.trk_per_cyl)) { 11991da177e4SLinus Torvalds DEV_MESSAGE(KERN_INFO, device, "Track no %d too big!", 12001da177e4SLinus Torvalds fdata->start_unit); 12011da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 12021da177e4SLinus Torvalds } 12031da177e4SLinus Torvalds if (fdata->start_unit > fdata->stop_unit) { 12041da177e4SLinus Torvalds DEV_MESSAGE(KERN_INFO, device, "Track %d reached! ending.", 12051da177e4SLinus Torvalds fdata->start_unit); 12061da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 12071da177e4SLinus Torvalds } 12081da177e4SLinus Torvalds if (dasd_check_blocksize(fdata->blksize) != 0) { 12091da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, 12101da177e4SLinus Torvalds "Invalid blocksize %d...terminating!", 12111da177e4SLinus Torvalds fdata->blksize); 12121da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 12131da177e4SLinus Torvalds } 12141da177e4SLinus Torvalds 12151da177e4SLinus Torvalds /* 12161da177e4SLinus Torvalds * fdata->intensity is a bit string that tells us what to do: 12171da177e4SLinus Torvalds * Bit 0: write record zero 12181da177e4SLinus Torvalds * Bit 1: write home address, currently not supported 12191da177e4SLinus Torvalds * Bit 2: invalidate tracks 12201da177e4SLinus Torvalds * Bit 3: use OS/390 compatible disk layout (cdl) 12211da177e4SLinus Torvalds * Only some bit combinations do make sense. 12221da177e4SLinus Torvalds */ 12231da177e4SLinus Torvalds switch (fdata->intensity) { 12241da177e4SLinus Torvalds case 0x00: /* Normal format */ 12251da177e4SLinus Torvalds case 0x08: /* Normal format, use cdl. */ 12261da177e4SLinus Torvalds cplength = 2 + rpt; 12271da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 12281da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 12291da177e4SLinus Torvalds rpt * sizeof(struct eckd_count); 12301da177e4SLinus Torvalds break; 12311da177e4SLinus Torvalds case 0x01: /* Write record zero and format track. */ 12321da177e4SLinus Torvalds case 0x09: /* Write record zero and format track, use cdl. */ 12331da177e4SLinus Torvalds cplength = 3 + rpt; 12341da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 12351da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 12361da177e4SLinus Torvalds sizeof(struct eckd_count) + 12371da177e4SLinus Torvalds rpt * sizeof(struct eckd_count); 12381da177e4SLinus Torvalds break; 12391da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 12401da177e4SLinus Torvalds case 0x0c: /* Invalidate track, use cdl. */ 12411da177e4SLinus Torvalds cplength = 3; 12421da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 12431da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 12441da177e4SLinus Torvalds sizeof(struct eckd_count); 12451da177e4SLinus Torvalds break; 12461da177e4SLinus Torvalds default: 12471da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "Invalid flags 0x%x.", 12481da177e4SLinus Torvalds fdata->intensity); 12491da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 12501da177e4SLinus Torvalds } 12511da177e4SLinus Torvalds /* Allocate the format ccw request. */ 12521da177e4SLinus Torvalds fcp = dasd_smalloc_request(dasd_eckd_discipline.name, 12531da177e4SLinus Torvalds cplength, datasize, device); 12541da177e4SLinus Torvalds if (IS_ERR(fcp)) 12551da177e4SLinus Torvalds return fcp; 12561da177e4SLinus Torvalds 12571da177e4SLinus Torvalds data = fcp->data; 12581da177e4SLinus Torvalds ccw = fcp->cpaddr; 12591da177e4SLinus Torvalds 12601da177e4SLinus Torvalds switch (fdata->intensity & ~0x08) { 12611da177e4SLinus Torvalds case 0x00: /* Normal format. */ 12621da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 12631da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 12641da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device); 12651da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 12661da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 12671da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 12681da177e4SLinus Torvalds fdata->start_unit, 0, rpt, 12691da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device, 12701da177e4SLinus Torvalds fdata->blksize); 12711da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 12721da177e4SLinus Torvalds break; 12731da177e4SLinus Torvalds case 0x01: /* Write record zero + format track. */ 12741da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 12751da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 12761da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, 12771da177e4SLinus Torvalds device); 12781da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 12791da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 12801da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 12811da177e4SLinus Torvalds fdata->start_unit, 0, rpt + 1, 12821da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, device, 12838e09f215SStefan Weinhuber device->block->bp_block); 12841da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 12851da177e4SLinus Torvalds break; 12861da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 12871da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 12881da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 12891da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device); 12901da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 12911da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 12921da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 12931da177e4SLinus Torvalds fdata->start_unit, 0, 1, 12941da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device, 8); 12951da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 12961da177e4SLinus Torvalds break; 12971da177e4SLinus Torvalds } 12981da177e4SLinus Torvalds if (fdata->intensity & 0x01) { /* write record zero */ 12991da177e4SLinus Torvalds ect = (struct eckd_count *) data; 13001da177e4SLinus Torvalds data += sizeof(struct eckd_count); 13011da177e4SLinus Torvalds ect->cyl = cyl; 13021da177e4SLinus Torvalds ect->head = head; 13031da177e4SLinus Torvalds ect->record = 0; 13041da177e4SLinus Torvalds ect->kl = 0; 13051da177e4SLinus Torvalds ect->dl = 8; 13061da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 13071da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 13081da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 13091da177e4SLinus Torvalds ccw->count = 8; 13101da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 13111da177e4SLinus Torvalds ccw++; 13121da177e4SLinus Torvalds } 13131da177e4SLinus Torvalds if ((fdata->intensity & ~0x08) & 0x04) { /* erase track */ 13141da177e4SLinus Torvalds ect = (struct eckd_count *) data; 13151da177e4SLinus Torvalds data += sizeof(struct eckd_count); 13161da177e4SLinus Torvalds ect->cyl = cyl; 13171da177e4SLinus Torvalds ect->head = head; 13181da177e4SLinus Torvalds ect->record = 1; 13191da177e4SLinus Torvalds ect->kl = 0; 13201da177e4SLinus Torvalds ect->dl = 0; 13211da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 13221da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 13231da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 13241da177e4SLinus Torvalds ccw->count = 8; 13251da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 13261da177e4SLinus Torvalds } else { /* write remaining records */ 13271da177e4SLinus Torvalds for (i = 0; i < rpt; i++) { 13281da177e4SLinus Torvalds ect = (struct eckd_count *) data; 13291da177e4SLinus Torvalds data += sizeof(struct eckd_count); 13301da177e4SLinus Torvalds ect->cyl = cyl; 13311da177e4SLinus Torvalds ect->head = head; 13321da177e4SLinus Torvalds ect->record = i + 1; 13331da177e4SLinus Torvalds ect->kl = 0; 13341da177e4SLinus Torvalds ect->dl = fdata->blksize; 13351da177e4SLinus Torvalds /* Check for special tracks 0-1 when formatting CDL */ 13361da177e4SLinus Torvalds if ((fdata->intensity & 0x08) && 13371da177e4SLinus Torvalds fdata->start_unit == 0) { 13381da177e4SLinus Torvalds if (i < 3) { 13391da177e4SLinus Torvalds ect->kl = 4; 13401da177e4SLinus Torvalds ect->dl = sizes_trk0[i] - 4; 13411da177e4SLinus Torvalds } 13421da177e4SLinus Torvalds } 13431da177e4SLinus Torvalds if ((fdata->intensity & 0x08) && 13441da177e4SLinus Torvalds fdata->start_unit == 1) { 13451da177e4SLinus Torvalds ect->kl = 44; 13461da177e4SLinus Torvalds ect->dl = LABEL_SIZE - 44; 13471da177e4SLinus Torvalds } 13481da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 13491da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 13501da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 13511da177e4SLinus Torvalds ccw->count = 8; 13521da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 13531da177e4SLinus Torvalds ccw++; 13541da177e4SLinus Torvalds } 13551da177e4SLinus Torvalds } 13568e09f215SStefan Weinhuber fcp->startdev = device; 13578e09f215SStefan Weinhuber fcp->memdev = device; 13588e09f215SStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &fcp->flags); 13598e09f215SStefan Weinhuber fcp->retries = 5; /* set retry counter to enable default ERP */ 13601da177e4SLinus Torvalds fcp->buildclk = get_clock(); 13611da177e4SLinus Torvalds fcp->status = DASD_CQR_FILLED; 13621da177e4SLinus Torvalds return fcp; 13631da177e4SLinus Torvalds } 13641da177e4SLinus Torvalds 13658e09f215SStefan Weinhuber static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 13661da177e4SLinus Torvalds { 13678e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 13688e09f215SStefan Weinhuber if (cqr->block && (cqr->startdev != cqr->block->base)) { 13698e09f215SStefan Weinhuber dasd_eckd_reset_ccw_to_base_io(cqr); 13708e09f215SStefan Weinhuber cqr->startdev = cqr->block->base; 13711da177e4SLinus Torvalds } 13728e09f215SStefan Weinhuber }; 13731da177e4SLinus Torvalds 13741da177e4SLinus Torvalds static dasd_erp_fn_t 13751da177e4SLinus Torvalds dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 13761da177e4SLinus Torvalds { 13778e09f215SStefan Weinhuber struct dasd_device *device = (struct dasd_device *) cqr->startdev; 13781da177e4SLinus Torvalds struct ccw_device *cdev = device->cdev; 13791da177e4SLinus Torvalds 13801da177e4SLinus Torvalds switch (cdev->id.cu_type) { 13811da177e4SLinus Torvalds case 0x3990: 13821da177e4SLinus Torvalds case 0x2105: 13831da177e4SLinus Torvalds case 0x2107: 13841da177e4SLinus Torvalds case 0x1750: 13851da177e4SLinus Torvalds return dasd_3990_erp_action; 13861da177e4SLinus Torvalds case 0x9343: 13871da177e4SLinus Torvalds case 0x3880: 13881da177e4SLinus Torvalds default: 13891da177e4SLinus Torvalds return dasd_default_erp_action; 13901da177e4SLinus Torvalds } 13911da177e4SLinus Torvalds } 13921da177e4SLinus Torvalds 13931da177e4SLinus Torvalds static dasd_erp_fn_t 13941da177e4SLinus Torvalds dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 13951da177e4SLinus Torvalds { 13961da177e4SLinus Torvalds return dasd_default_erp_postaction; 13971da177e4SLinus Torvalds } 13981da177e4SLinus Torvalds 13998e09f215SStefan Weinhuber 14008e09f215SStefan Weinhuber static void dasd_eckd_handle_unsolicited_interrupt(struct dasd_device *device, 14018e09f215SStefan Weinhuber struct irb *irb) 14028e09f215SStefan Weinhuber { 14038e09f215SStefan Weinhuber char mask; 14048e09f215SStefan Weinhuber 14058e09f215SStefan Weinhuber /* first of all check for state change pending interrupt */ 14068e09f215SStefan Weinhuber mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 14078e09f215SStefan Weinhuber if ((irb->scsw.dstat & mask) == mask) { 14088e09f215SStefan Weinhuber dasd_generic_handle_state_change(device); 14098e09f215SStefan Weinhuber return; 14108e09f215SStefan Weinhuber } 14118e09f215SStefan Weinhuber 14128e09f215SStefan Weinhuber /* summary unit check */ 14138e09f215SStefan Weinhuber if ((irb->scsw.dstat & DEV_STAT_UNIT_CHECK) && irb->ecw[7] == 0x0D) { 14148e09f215SStefan Weinhuber dasd_alias_handle_summary_unit_check(device, irb); 14158e09f215SStefan Weinhuber return; 14168e09f215SStefan Weinhuber } 14178e09f215SStefan Weinhuber 14188e09f215SStefan Weinhuber /* just report other unsolicited interrupts */ 14198e09f215SStefan Weinhuber DEV_MESSAGE(KERN_DEBUG, device, "%s", 14208e09f215SStefan Weinhuber "unsolicited interrupt received"); 14218e09f215SStefan Weinhuber device->discipline->dump_sense(device, NULL, irb); 14228e09f215SStefan Weinhuber dasd_schedule_device_bh(device); 14238e09f215SStefan Weinhuber 14248e09f215SStefan Weinhuber return; 14258e09f215SStefan Weinhuber }; 14268e09f215SStefan Weinhuber 14278e09f215SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 14288e09f215SStefan Weinhuber struct dasd_block *block, 14298e09f215SStefan Weinhuber struct request *req) 14301da177e4SLinus Torvalds { 14311da177e4SLinus Torvalds struct dasd_eckd_private *private; 14321da177e4SLinus Torvalds unsigned long *idaws; 14331da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 14341da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 14351da177e4SLinus Torvalds struct ccw1 *ccw; 14365705f702SNeilBrown struct req_iterator iter; 14371da177e4SLinus Torvalds struct bio_vec *bv; 14381da177e4SLinus Torvalds char *dst; 14391da177e4SLinus Torvalds unsigned int blksize, blk_per_trk, off; 14401da177e4SLinus Torvalds int count, cidaw, cplength, datasize; 14411da177e4SLinus Torvalds sector_t recid, first_rec, last_rec; 14421da177e4SLinus Torvalds sector_t first_trk, last_trk; 14431da177e4SLinus Torvalds unsigned int first_offs, last_offs; 14441da177e4SLinus Torvalds unsigned char cmd, rcmd; 14458e09f215SStefan Weinhuber int use_prefix; 14468e09f215SStefan Weinhuber struct dasd_device *basedev; 14471da177e4SLinus Torvalds 14488e09f215SStefan Weinhuber basedev = block->base; 14498e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 14501da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 14511da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_READ_MT; 14521da177e4SLinus Torvalds else if (rq_data_dir(req) == WRITE) 14531da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_WRITE_MT; 14541da177e4SLinus Torvalds else 14551da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 14561da177e4SLinus Torvalds /* Calculate number of blocks/records per track. */ 14578e09f215SStefan Weinhuber blksize = block->bp_block; 14581da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 14591da177e4SLinus Torvalds /* Calculate record id of first and last block. */ 14608e09f215SStefan Weinhuber first_rec = first_trk = req->sector >> block->s2b_shift; 14611da177e4SLinus Torvalds first_offs = sector_div(first_trk, blk_per_trk); 14621da177e4SLinus Torvalds last_rec = last_trk = 14638e09f215SStefan Weinhuber (req->sector + req->nr_sectors - 1) >> block->s2b_shift; 14641da177e4SLinus Torvalds last_offs = sector_div(last_trk, blk_per_trk); 14651da177e4SLinus Torvalds /* Check struct bio and count the number of blocks for the request. */ 14661da177e4SLinus Torvalds count = 0; 14671da177e4SLinus Torvalds cidaw = 0; 14685705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 14691da177e4SLinus Torvalds if (bv->bv_len & (blksize - 1)) 14701da177e4SLinus Torvalds /* Eckd can only do full blocks. */ 14711da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 14728e09f215SStefan Weinhuber count += bv->bv_len >> (block->s2b_shift + 9); 1473347a8dc3SMartin Schwidefsky #if defined(CONFIG_64BIT) 14746c92e699SJens Axboe if (idal_is_needed (page_address(bv->bv_page), bv->bv_len)) 14758e09f215SStefan Weinhuber cidaw += bv->bv_len >> (block->s2b_shift + 9); 14761da177e4SLinus Torvalds #endif 14771da177e4SLinus Torvalds } 14781da177e4SLinus Torvalds /* Paranoia. */ 14791da177e4SLinus Torvalds if (count != last_rec - first_rec + 1) 14801da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 14818e09f215SStefan Weinhuber 14828e09f215SStefan Weinhuber /* use the prefix command if available */ 14838e09f215SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 14848e09f215SStefan Weinhuber if (use_prefix) { 14858e09f215SStefan Weinhuber /* 1x prefix + number of blocks */ 14868e09f215SStefan Weinhuber cplength = 2 + count; 14878e09f215SStefan Weinhuber /* 1x prefix + cidaws*sizeof(long) */ 14888e09f215SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 14898e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 14908e09f215SStefan Weinhuber cidaw * sizeof(unsigned long); 14918e09f215SStefan Weinhuber } else { 14921da177e4SLinus Torvalds /* 1x define extent + 1x locate record + number of blocks */ 14931da177e4SLinus Torvalds cplength = 2 + count; 14941da177e4SLinus Torvalds /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 14958e09f215SStefan Weinhuber datasize = sizeof(struct DE_eckd_data) + 14968e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 14971da177e4SLinus Torvalds cidaw * sizeof(unsigned long); 14988e09f215SStefan Weinhuber } 14991da177e4SLinus Torvalds /* Find out the number of additional locate record ccws for cdl. */ 15001da177e4SLinus Torvalds if (private->uses_cdl && first_rec < 2*blk_per_trk) { 15011da177e4SLinus Torvalds if (last_rec >= 2*blk_per_trk) 15021da177e4SLinus Torvalds count = 2*blk_per_trk - first_rec; 15031da177e4SLinus Torvalds cplength += count; 15041da177e4SLinus Torvalds datasize += count*sizeof(struct LO_eckd_data); 15051da177e4SLinus Torvalds } 15061da177e4SLinus Torvalds /* Allocate the ccw request. */ 15071da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 15088e09f215SStefan Weinhuber cplength, datasize, startdev); 15091da177e4SLinus Torvalds if (IS_ERR(cqr)) 15101da177e4SLinus Torvalds return cqr; 15111da177e4SLinus Torvalds ccw = cqr->cpaddr; 15128e09f215SStefan Weinhuber /* First ccw is define extent or prefix. */ 15138e09f215SStefan Weinhuber if (use_prefix) { 15148e09f215SStefan Weinhuber if (prefix(ccw++, cqr->data, first_trk, 15158e09f215SStefan Weinhuber last_trk, cmd, basedev, startdev) == -EAGAIN) { 15168e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 15178e09f215SStefan Weinhuber * Try again later. 15188e09f215SStefan Weinhuber */ 15198e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 1520d54853efSMartin Schwidefsky return ERR_PTR(-EAGAIN); 1521d54853efSMartin Schwidefsky } 15228e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 15238e09f215SStefan Weinhuber sizeof(struct PFX_eckd_data)); 15248e09f215SStefan Weinhuber } else { 15258e09f215SStefan Weinhuber if (define_extent(ccw++, cqr->data, first_trk, 15268e09f215SStefan Weinhuber last_trk, cmd, startdev) == -EAGAIN) { 15278e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 15288e09f215SStefan Weinhuber * Try again later. 15298e09f215SStefan Weinhuber */ 15308e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 15318e09f215SStefan Weinhuber return ERR_PTR(-EAGAIN); 15328e09f215SStefan Weinhuber } 15338e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 15348e09f215SStefan Weinhuber sizeof(struct DE_eckd_data)); 15358e09f215SStefan Weinhuber } 15361da177e4SLinus Torvalds /* Build locate_record+read/write/ccws. */ 15371da177e4SLinus Torvalds LO_data = (struct LO_eckd_data *) (idaws + cidaw); 15381da177e4SLinus Torvalds recid = first_rec; 15391da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 15401da177e4SLinus Torvalds /* Only standard blocks so there is just one locate record. */ 15411da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 15421da177e4SLinus Torvalds locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 15438e09f215SStefan Weinhuber last_rec - recid + 1, cmd, basedev, blksize); 15441da177e4SLinus Torvalds } 15455705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 15461da177e4SLinus Torvalds dst = page_address(bv->bv_page) + bv->bv_offset; 15471da177e4SLinus Torvalds if (dasd_page_cache) { 15481da177e4SLinus Torvalds char *copy = kmem_cache_alloc(dasd_page_cache, 1549441e143eSChristoph Lameter GFP_DMA | __GFP_NOWARN); 15501da177e4SLinus Torvalds if (copy && rq_data_dir(req) == WRITE) 15511da177e4SLinus Torvalds memcpy(copy + bv->bv_offset, dst, bv->bv_len); 15521da177e4SLinus Torvalds if (copy) 15531da177e4SLinus Torvalds dst = copy + bv->bv_offset; 15541da177e4SLinus Torvalds } 15551da177e4SLinus Torvalds for (off = 0; off < bv->bv_len; off += blksize) { 15561da177e4SLinus Torvalds sector_t trkid = recid; 15571da177e4SLinus Torvalds unsigned int recoffs = sector_div(trkid, blk_per_trk); 15581da177e4SLinus Torvalds rcmd = cmd; 15591da177e4SLinus Torvalds count = blksize; 15601da177e4SLinus Torvalds /* Locate record for cdl special block ? */ 15611da177e4SLinus Torvalds if (private->uses_cdl && recid < 2*blk_per_trk) { 15621da177e4SLinus Torvalds if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 15631da177e4SLinus Torvalds rcmd |= 0x8; 15641da177e4SLinus Torvalds count = dasd_eckd_cdl_reclen(recid); 1565ec5883abSHorst Hummel if (count < blksize && 1566ec5883abSHorst Hummel rq_data_dir(req) == READ) 15671da177e4SLinus Torvalds memset(dst + count, 0xe5, 15681da177e4SLinus Torvalds blksize - count); 15691da177e4SLinus Torvalds } 15701da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 15711da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 15721da177e4SLinus Torvalds trkid, recoffs + 1, 15738e09f215SStefan Weinhuber 1, rcmd, basedev, count); 15741da177e4SLinus Torvalds } 15751da177e4SLinus Torvalds /* Locate record for standard blocks ? */ 15761da177e4SLinus Torvalds if (private->uses_cdl && recid == 2*blk_per_trk) { 15771da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 15781da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 15791da177e4SLinus Torvalds trkid, recoffs + 1, 15801da177e4SLinus Torvalds last_rec - recid + 1, 15818e09f215SStefan Weinhuber cmd, basedev, count); 15821da177e4SLinus Torvalds } 15831da177e4SLinus Torvalds /* Read/write ccw. */ 15841da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 15851da177e4SLinus Torvalds ccw->cmd_code = rcmd; 15861da177e4SLinus Torvalds ccw->count = count; 15871da177e4SLinus Torvalds if (idal_is_needed(dst, blksize)) { 15881da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) idaws; 15891da177e4SLinus Torvalds ccw->flags = CCW_FLAG_IDA; 15901da177e4SLinus Torvalds idaws = idal_create_words(idaws, dst, blksize); 15911da177e4SLinus Torvalds } else { 15921da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) dst; 15931da177e4SLinus Torvalds ccw->flags = 0; 15941da177e4SLinus Torvalds } 15951da177e4SLinus Torvalds ccw++; 15961da177e4SLinus Torvalds dst += blksize; 15971da177e4SLinus Torvalds recid++; 15981da177e4SLinus Torvalds } 15991da177e4SLinus Torvalds } 16004aff5e23SJens Axboe if (req->cmd_flags & REQ_FAILFAST) 16011c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 16028e09f215SStefan Weinhuber cqr->startdev = startdev; 16038e09f215SStefan Weinhuber cqr->memdev = startdev; 16048e09f215SStefan Weinhuber cqr->block = block; 16051da177e4SLinus Torvalds cqr->expires = 5 * 60 * HZ; /* 5 minutes */ 16061da177e4SLinus Torvalds cqr->lpm = private->path_data.ppm; 16071da177e4SLinus Torvalds cqr->retries = 256; 16081da177e4SLinus Torvalds cqr->buildclk = get_clock(); 16091da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 16101da177e4SLinus Torvalds return cqr; 16111da177e4SLinus Torvalds } 16121da177e4SLinus Torvalds 16131da177e4SLinus Torvalds static int 16141da177e4SLinus Torvalds dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 16151da177e4SLinus Torvalds { 16161da177e4SLinus Torvalds struct dasd_eckd_private *private; 16171da177e4SLinus Torvalds struct ccw1 *ccw; 16185705f702SNeilBrown struct req_iterator iter; 16191da177e4SLinus Torvalds struct bio_vec *bv; 16201da177e4SLinus Torvalds char *dst, *cda; 16211da177e4SLinus Torvalds unsigned int blksize, blk_per_trk, off; 16221da177e4SLinus Torvalds sector_t recid; 16235705f702SNeilBrown int status; 16241da177e4SLinus Torvalds 16251da177e4SLinus Torvalds if (!dasd_page_cache) 16261da177e4SLinus Torvalds goto out; 16278e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) cqr->block->base->private; 16288e09f215SStefan Weinhuber blksize = cqr->block->bp_block; 16291da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 16308e09f215SStefan Weinhuber recid = req->sector >> cqr->block->s2b_shift; 16311da177e4SLinus Torvalds ccw = cqr->cpaddr; 16321da177e4SLinus Torvalds /* Skip over define extent & locate record. */ 16331da177e4SLinus Torvalds ccw++; 16341da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 16351da177e4SLinus Torvalds ccw++; 16365705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 16371da177e4SLinus Torvalds dst = page_address(bv->bv_page) + bv->bv_offset; 16381da177e4SLinus Torvalds for (off = 0; off < bv->bv_len; off += blksize) { 16391da177e4SLinus Torvalds /* Skip locate record. */ 16401da177e4SLinus Torvalds if (private->uses_cdl && recid <= 2*blk_per_trk) 16411da177e4SLinus Torvalds ccw++; 16421da177e4SLinus Torvalds if (dst) { 16431da177e4SLinus Torvalds if (ccw->flags & CCW_FLAG_IDA) 16441da177e4SLinus Torvalds cda = *((char **)((addr_t) ccw->cda)); 16451da177e4SLinus Torvalds else 16461da177e4SLinus Torvalds cda = (char *)((addr_t) ccw->cda); 16471da177e4SLinus Torvalds if (dst != cda) { 16481da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 16491da177e4SLinus Torvalds memcpy(dst, cda, bv->bv_len); 16501da177e4SLinus Torvalds kmem_cache_free(dasd_page_cache, 16511da177e4SLinus Torvalds (void *)((addr_t)cda & PAGE_MASK)); 16521da177e4SLinus Torvalds } 16531da177e4SLinus Torvalds dst = NULL; 16541da177e4SLinus Torvalds } 16551da177e4SLinus Torvalds ccw++; 16561da177e4SLinus Torvalds recid++; 16571da177e4SLinus Torvalds } 16581da177e4SLinus Torvalds } 16591da177e4SLinus Torvalds out: 16601da177e4SLinus Torvalds status = cqr->status == DASD_CQR_DONE; 16618e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 16621da177e4SLinus Torvalds return status; 16631da177e4SLinus Torvalds } 16641da177e4SLinus Torvalds 16658e09f215SStefan Weinhuber /* 16668e09f215SStefan Weinhuber * Modify ccw chain in cqr so it can be started on a base device. 16678e09f215SStefan Weinhuber * 16688e09f215SStefan Weinhuber * Note that this is not enough to restart the cqr! 16698e09f215SStefan Weinhuber * Either reset cqr->startdev as well (summary unit check handling) 16708e09f215SStefan Weinhuber * or restart via separate cqr (as in ERP handling). 16718e09f215SStefan Weinhuber */ 16728e09f215SStefan Weinhuber void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 16738e09f215SStefan Weinhuber { 16748e09f215SStefan Weinhuber struct ccw1 *ccw; 16758e09f215SStefan Weinhuber struct PFX_eckd_data *pfxdata; 16768e09f215SStefan Weinhuber 16778e09f215SStefan Weinhuber ccw = cqr->cpaddr; 16788e09f215SStefan Weinhuber pfxdata = cqr->data; 16798e09f215SStefan Weinhuber 16808e09f215SStefan Weinhuber if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 16818e09f215SStefan Weinhuber pfxdata->validity.verify_base = 0; 16828e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 16838e09f215SStefan Weinhuber } 16848e09f215SStefan Weinhuber } 16858e09f215SStefan Weinhuber 16868e09f215SStefan Weinhuber #define DASD_ECKD_CHANQ_MAX_SIZE 4 16878e09f215SStefan Weinhuber 16888e09f215SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 16898e09f215SStefan Weinhuber struct dasd_block *block, 16908e09f215SStefan Weinhuber struct request *req) 16918e09f215SStefan Weinhuber { 16928e09f215SStefan Weinhuber struct dasd_eckd_private *private; 16938e09f215SStefan Weinhuber struct dasd_device *startdev; 16948e09f215SStefan Weinhuber unsigned long flags; 16958e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 16968e09f215SStefan Weinhuber 16978e09f215SStefan Weinhuber startdev = dasd_alias_get_start_dev(base); 16988e09f215SStefan Weinhuber if (!startdev) 16998e09f215SStefan Weinhuber startdev = base; 17008e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) startdev->private; 17018e09f215SStefan Weinhuber if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 17028e09f215SStefan Weinhuber return ERR_PTR(-EBUSY); 17038e09f215SStefan Weinhuber 17048e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 17058e09f215SStefan Weinhuber private->count++; 17068e09f215SStefan Weinhuber cqr = dasd_eckd_build_cp(startdev, block, req); 17078e09f215SStefan Weinhuber if (IS_ERR(cqr)) 17088e09f215SStefan Weinhuber private->count--; 17098e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 17108e09f215SStefan Weinhuber return cqr; 17118e09f215SStefan Weinhuber } 17128e09f215SStefan Weinhuber 17138e09f215SStefan Weinhuber static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 17148e09f215SStefan Weinhuber struct request *req) 17158e09f215SStefan Weinhuber { 17168e09f215SStefan Weinhuber struct dasd_eckd_private *private; 17178e09f215SStefan Weinhuber unsigned long flags; 17188e09f215SStefan Weinhuber 17198e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 17208e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) cqr->memdev->private; 17218e09f215SStefan Weinhuber private->count--; 17228e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 17238e09f215SStefan Weinhuber return dasd_eckd_free_cp(cqr, req); 17248e09f215SStefan Weinhuber } 17258e09f215SStefan Weinhuber 17261da177e4SLinus Torvalds static int 17271da177e4SLinus Torvalds dasd_eckd_fill_info(struct dasd_device * device, 17281da177e4SLinus Torvalds struct dasd_information2_t * info) 17291da177e4SLinus Torvalds { 17301da177e4SLinus Torvalds struct dasd_eckd_private *private; 17311da177e4SLinus Torvalds 17321da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 17331da177e4SLinus Torvalds info->label_block = 2; 17341da177e4SLinus Torvalds info->FBA_layout = private->uses_cdl ? 0 : 1; 17351da177e4SLinus Torvalds info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 17361da177e4SLinus Torvalds info->characteristics_size = sizeof(struct dasd_eckd_characteristics); 17371da177e4SLinus Torvalds memcpy(info->characteristics, &private->rdc_data, 17381da177e4SLinus Torvalds sizeof(struct dasd_eckd_characteristics)); 17391da177e4SLinus Torvalds info->confdata_size = sizeof(struct dasd_eckd_confdata); 17401da177e4SLinus Torvalds memcpy(info->configuration_data, &private->conf_data, 17411da177e4SLinus Torvalds sizeof(struct dasd_eckd_confdata)); 17421da177e4SLinus Torvalds return 0; 17431da177e4SLinus Torvalds } 17441da177e4SLinus Torvalds 17451da177e4SLinus Torvalds /* 17461da177e4SLinus Torvalds * SECTION: ioctl functions for eckd devices. 17471da177e4SLinus Torvalds */ 17481da177e4SLinus Torvalds 17491da177e4SLinus Torvalds /* 17501da177e4SLinus Torvalds * Release device ioctl. 17511da177e4SLinus Torvalds * Buils a channel programm to releases a prior reserved 17521da177e4SLinus Torvalds * (see dasd_eckd_reserve) device. 17531da177e4SLinus Torvalds */ 17541da177e4SLinus Torvalds static int 17551107ccfbSChristoph Hellwig dasd_eckd_release(struct dasd_device *device) 17561da177e4SLinus Torvalds { 17571da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 17581da177e4SLinus Torvalds int rc; 17591da177e4SLinus Torvalds 17601da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 17611da177e4SLinus Torvalds return -EACCES; 17621da177e4SLinus Torvalds 17631da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 17641da177e4SLinus Torvalds 1, 32, device); 17651da177e4SLinus Torvalds if (IS_ERR(cqr)) { 17661da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 17671da177e4SLinus Torvalds "Could not allocate initialization request"); 17681da177e4SLinus Torvalds return PTR_ERR(cqr); 17691da177e4SLinus Torvalds } 17701da177e4SLinus Torvalds cqr->cpaddr->cmd_code = DASD_ECKD_CCW_RELEASE; 17711da177e4SLinus Torvalds cqr->cpaddr->flags |= CCW_FLAG_SLI; 17721da177e4SLinus Torvalds cqr->cpaddr->count = 32; 17731da177e4SLinus Torvalds cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; 17748e09f215SStefan Weinhuber cqr->startdev = device; 17758e09f215SStefan Weinhuber cqr->memdev = device; 17761da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 17771c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 1778336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 17791da177e4SLinus Torvalds cqr->expires = 2 * HZ; 17801da177e4SLinus Torvalds cqr->buildclk = get_clock(); 17811da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 17821da177e4SLinus Torvalds 17831da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 17841da177e4SLinus Torvalds 17858e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 17861da177e4SLinus Torvalds return rc; 17871da177e4SLinus Torvalds } 17881da177e4SLinus Torvalds 17891da177e4SLinus Torvalds /* 17901da177e4SLinus Torvalds * Reserve device ioctl. 17911da177e4SLinus Torvalds * Options are set to 'synchronous wait for interrupt' and 17921da177e4SLinus Torvalds * 'timeout the request'. This leads to a terminate IO if 17931da177e4SLinus Torvalds * the interrupt is outstanding for a certain time. 17941da177e4SLinus Torvalds */ 17951da177e4SLinus Torvalds static int 17961107ccfbSChristoph Hellwig dasd_eckd_reserve(struct dasd_device *device) 17971da177e4SLinus Torvalds { 17981da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 17991da177e4SLinus Torvalds int rc; 18001da177e4SLinus Torvalds 18011da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 18021da177e4SLinus Torvalds return -EACCES; 18031da177e4SLinus Torvalds 18041da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 18051da177e4SLinus Torvalds 1, 32, device); 18061da177e4SLinus Torvalds if (IS_ERR(cqr)) { 18071da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 18081da177e4SLinus Torvalds "Could not allocate initialization request"); 18091da177e4SLinus Torvalds return PTR_ERR(cqr); 18101da177e4SLinus Torvalds } 18111da177e4SLinus Torvalds cqr->cpaddr->cmd_code = DASD_ECKD_CCW_RESERVE; 18121da177e4SLinus Torvalds cqr->cpaddr->flags |= CCW_FLAG_SLI; 18131da177e4SLinus Torvalds cqr->cpaddr->count = 32; 18141da177e4SLinus Torvalds cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; 18158e09f215SStefan Weinhuber cqr->startdev = device; 18168e09f215SStefan Weinhuber cqr->memdev = device; 18171da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 18181c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 1819336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 18201da177e4SLinus Torvalds cqr->expires = 2 * HZ; 18211da177e4SLinus Torvalds cqr->buildclk = get_clock(); 18221da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 18231da177e4SLinus Torvalds 18241da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 18251da177e4SLinus Torvalds 18268e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 18271da177e4SLinus Torvalds return rc; 18281da177e4SLinus Torvalds } 18291da177e4SLinus Torvalds 18301da177e4SLinus Torvalds /* 18311da177e4SLinus Torvalds * Steal lock ioctl - unconditional reserve device. 18321da177e4SLinus Torvalds * Buils a channel programm to break a device's reservation. 18331da177e4SLinus Torvalds * (unconditional reserve) 18341da177e4SLinus Torvalds */ 18351da177e4SLinus Torvalds static int 18361107ccfbSChristoph Hellwig dasd_eckd_steal_lock(struct dasd_device *device) 18371da177e4SLinus Torvalds { 18381da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 18391da177e4SLinus Torvalds int rc; 18401da177e4SLinus Torvalds 18411da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 18421da177e4SLinus Torvalds return -EACCES; 18431da177e4SLinus Torvalds 18441da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 18451da177e4SLinus Torvalds 1, 32, device); 18461da177e4SLinus Torvalds if (IS_ERR(cqr)) { 18471da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 18481da177e4SLinus Torvalds "Could not allocate initialization request"); 18491da177e4SLinus Torvalds return PTR_ERR(cqr); 18501da177e4SLinus Torvalds } 18511da177e4SLinus Torvalds cqr->cpaddr->cmd_code = DASD_ECKD_CCW_SLCK; 18521da177e4SLinus Torvalds cqr->cpaddr->flags |= CCW_FLAG_SLI; 18531da177e4SLinus Torvalds cqr->cpaddr->count = 32; 18541da177e4SLinus Torvalds cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; 18558e09f215SStefan Weinhuber cqr->startdev = device; 18568e09f215SStefan Weinhuber cqr->memdev = device; 18571da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 18581c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 1859336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 18601da177e4SLinus Torvalds cqr->expires = 2 * HZ; 18611da177e4SLinus Torvalds cqr->buildclk = get_clock(); 18621da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 18631da177e4SLinus Torvalds 18641da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 18651da177e4SLinus Torvalds 18668e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 18671da177e4SLinus Torvalds return rc; 18681da177e4SLinus Torvalds } 18691da177e4SLinus Torvalds 18701da177e4SLinus Torvalds /* 18711da177e4SLinus Torvalds * Read performance statistics 18721da177e4SLinus Torvalds */ 18731da177e4SLinus Torvalds static int 18741107ccfbSChristoph Hellwig dasd_eckd_performance(struct dasd_device *device, void __user *argp) 18751da177e4SLinus Torvalds { 18761da177e4SLinus Torvalds struct dasd_psf_prssd_data *prssdp; 18771da177e4SLinus Torvalds struct dasd_rssd_perf_stats_t *stats; 18781da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 18791da177e4SLinus Torvalds struct ccw1 *ccw; 18801da177e4SLinus Torvalds int rc; 18811da177e4SLinus Torvalds 18821da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 18831da177e4SLinus Torvalds 1 /* PSF */ + 1 /* RSSD */ , 18841da177e4SLinus Torvalds (sizeof(struct dasd_psf_prssd_data) + 18851da177e4SLinus Torvalds sizeof(struct dasd_rssd_perf_stats_t)), 18861da177e4SLinus Torvalds device); 18871da177e4SLinus Torvalds if (IS_ERR(cqr)) { 18881da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 18891da177e4SLinus Torvalds "Could not allocate initialization request"); 18901da177e4SLinus Torvalds return PTR_ERR(cqr); 18911da177e4SLinus Torvalds } 18928e09f215SStefan Weinhuber cqr->startdev = device; 18938e09f215SStefan Weinhuber cqr->memdev = device; 18941da177e4SLinus Torvalds cqr->retries = 0; 18951da177e4SLinus Torvalds cqr->expires = 10 * HZ; 18961da177e4SLinus Torvalds 18971da177e4SLinus Torvalds /* Prepare for Read Subsystem Data */ 18981da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 18991da177e4SLinus Torvalds memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 19001da177e4SLinus Torvalds prssdp->order = PSF_ORDER_PRSSD; 19015d67d164SJoe Perches prssdp->suborder = 0x01; /* Performance Statistics */ 19021da177e4SLinus Torvalds prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 19031da177e4SLinus Torvalds 19041da177e4SLinus Torvalds ccw = cqr->cpaddr; 19051da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_PSF; 19061da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_psf_prssd_data); 19071da177e4SLinus Torvalds ccw->flags |= CCW_FLAG_CC; 19081da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) prssdp; 19091da177e4SLinus Torvalds 19101da177e4SLinus Torvalds /* Read Subsystem Data - Performance Statistics */ 19111da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 19121da177e4SLinus Torvalds memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 19131da177e4SLinus Torvalds 19141da177e4SLinus Torvalds ccw++; 19151da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_RSSD; 19161da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 19171da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) stats; 19181da177e4SLinus Torvalds 19191da177e4SLinus Torvalds cqr->buildclk = get_clock(); 19201da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 19211da177e4SLinus Torvalds rc = dasd_sleep_on(cqr); 19221da177e4SLinus Torvalds if (rc == 0) { 19231da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 19241da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 19251107ccfbSChristoph Hellwig if (copy_to_user(argp, stats, 19261107ccfbSChristoph Hellwig sizeof(struct dasd_rssd_perf_stats_t))) 19271107ccfbSChristoph Hellwig rc = -EFAULT; 19281da177e4SLinus Torvalds } 19298e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 19301da177e4SLinus Torvalds return rc; 19311da177e4SLinus Torvalds } 19321da177e4SLinus Torvalds 19331da177e4SLinus Torvalds /* 19341da177e4SLinus Torvalds * Get attributes (cache operations) 19351da177e4SLinus Torvalds * Returnes the cache attributes used in Define Extend (DE). 19361da177e4SLinus Torvalds */ 19371da177e4SLinus Torvalds static int 19381107ccfbSChristoph Hellwig dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 19391da177e4SLinus Torvalds { 19401107ccfbSChristoph Hellwig struct dasd_eckd_private *private = 19411107ccfbSChristoph Hellwig (struct dasd_eckd_private *)device->private; 19421107ccfbSChristoph Hellwig struct attrib_data_t attrib = private->attrib; 19431da177e4SLinus Torvalds int rc; 19441da177e4SLinus Torvalds 19451da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 19461da177e4SLinus Torvalds return -EACCES; 19471107ccfbSChristoph Hellwig if (!argp) 19481da177e4SLinus Torvalds return -EINVAL; 19491da177e4SLinus Torvalds 19501107ccfbSChristoph Hellwig rc = 0; 19511107ccfbSChristoph Hellwig if (copy_to_user(argp, (long *) &attrib, 19521107ccfbSChristoph Hellwig sizeof(struct attrib_data_t))) 19531107ccfbSChristoph Hellwig rc = -EFAULT; 19541da177e4SLinus Torvalds 19551da177e4SLinus Torvalds return rc; 19561da177e4SLinus Torvalds } 19571da177e4SLinus Torvalds 19581da177e4SLinus Torvalds /* 19591da177e4SLinus Torvalds * Set attributes (cache operations) 19601da177e4SLinus Torvalds * Stores the attributes for cache operation to be used in Define Extend (DE). 19611da177e4SLinus Torvalds */ 19621da177e4SLinus Torvalds static int 19631107ccfbSChristoph Hellwig dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 19641da177e4SLinus Torvalds { 19651107ccfbSChristoph Hellwig struct dasd_eckd_private *private = 19661107ccfbSChristoph Hellwig (struct dasd_eckd_private *)device->private; 19671da177e4SLinus Torvalds struct attrib_data_t attrib; 19681da177e4SLinus Torvalds 19691da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 19701da177e4SLinus Torvalds return -EACCES; 19711107ccfbSChristoph Hellwig if (!argp) 19721da177e4SLinus Torvalds return -EINVAL; 19731da177e4SLinus Torvalds 19741107ccfbSChristoph Hellwig if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 19751da177e4SLinus Torvalds return -EFAULT; 19761da177e4SLinus Torvalds private->attrib = attrib; 19771da177e4SLinus Torvalds 19781da177e4SLinus Torvalds DEV_MESSAGE(KERN_INFO, device, 19791da177e4SLinus Torvalds "cache operation mode set to %x (%i cylinder prestage)", 19801da177e4SLinus Torvalds private->attrib.operation, private->attrib.nr_cyl); 19811da177e4SLinus Torvalds return 0; 19821da177e4SLinus Torvalds } 19831da177e4SLinus Torvalds 19841107ccfbSChristoph Hellwig static int 19858e09f215SStefan Weinhuber dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 19861107ccfbSChristoph Hellwig { 19878e09f215SStefan Weinhuber struct dasd_device *device = block->base; 19888e09f215SStefan Weinhuber 19891107ccfbSChristoph Hellwig switch (cmd) { 19901107ccfbSChristoph Hellwig case BIODASDGATTR: 19911107ccfbSChristoph Hellwig return dasd_eckd_get_attrib(device, argp); 19921107ccfbSChristoph Hellwig case BIODASDSATTR: 19931107ccfbSChristoph Hellwig return dasd_eckd_set_attrib(device, argp); 19941107ccfbSChristoph Hellwig case BIODASDPSRD: 19951107ccfbSChristoph Hellwig return dasd_eckd_performance(device, argp); 19961107ccfbSChristoph Hellwig case BIODASDRLSE: 19971107ccfbSChristoph Hellwig return dasd_eckd_release(device); 19981107ccfbSChristoph Hellwig case BIODASDRSRV: 19991107ccfbSChristoph Hellwig return dasd_eckd_reserve(device); 20001107ccfbSChristoph Hellwig case BIODASDSLCK: 20011107ccfbSChristoph Hellwig return dasd_eckd_steal_lock(device); 20021107ccfbSChristoph Hellwig default: 20031107ccfbSChristoph Hellwig return -ENOIOCTLCMD; 20041107ccfbSChristoph Hellwig } 20051107ccfbSChristoph Hellwig } 20061107ccfbSChristoph Hellwig 20071da177e4SLinus Torvalds /* 2008445b5b49SHorst Hummel * Dump the range of CCWs into 'page' buffer 2009445b5b49SHorst Hummel * and return number of printed chars. 2010445b5b49SHorst Hummel */ 20114d284cacSHeiko Carstens static int 2012445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 2013445b5b49SHorst Hummel { 2014445b5b49SHorst Hummel int len, count; 2015445b5b49SHorst Hummel char *datap; 2016445b5b49SHorst Hummel 2017445b5b49SHorst Hummel len = 0; 2018445b5b49SHorst Hummel while (from <= to) { 2019445b5b49SHorst Hummel len += sprintf(page + len, KERN_ERR PRINTK_HEADER 2020445b5b49SHorst Hummel " CCW %p: %08X %08X DAT:", 2021445b5b49SHorst Hummel from, ((int *) from)[0], ((int *) from)[1]); 2022445b5b49SHorst Hummel 2023445b5b49SHorst Hummel /* get pointer to data (consider IDALs) */ 2024445b5b49SHorst Hummel if (from->flags & CCW_FLAG_IDA) 2025445b5b49SHorst Hummel datap = (char *) *((addr_t *) (addr_t) from->cda); 2026445b5b49SHorst Hummel else 2027445b5b49SHorst Hummel datap = (char *) ((addr_t) from->cda); 2028445b5b49SHorst Hummel 2029445b5b49SHorst Hummel /* dump data (max 32 bytes) */ 2030445b5b49SHorst Hummel for (count = 0; count < from->count && count < 32; count++) { 2031445b5b49SHorst Hummel if (count % 8 == 0) len += sprintf(page + len, " "); 2032445b5b49SHorst Hummel if (count % 4 == 0) len += sprintf(page + len, " "); 2033445b5b49SHorst Hummel len += sprintf(page + len, "%02x", datap[count]); 2034445b5b49SHorst Hummel } 2035445b5b49SHorst Hummel len += sprintf(page + len, "\n"); 2036445b5b49SHorst Hummel from++; 2037445b5b49SHorst Hummel } 2038445b5b49SHorst Hummel return len; 2039445b5b49SHorst Hummel } 2040445b5b49SHorst Hummel 2041445b5b49SHorst Hummel /* 20421da177e4SLinus Torvalds * Print sense data and related channel program. 20431da177e4SLinus Torvalds * Parts are printed because printk buffer is only 1024 bytes. 20441da177e4SLinus Torvalds */ 20458e09f215SStefan Weinhuber static void dasd_eckd_dump_sense(struct dasd_device *device, 20468e09f215SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 20471da177e4SLinus Torvalds { 20481da177e4SLinus Torvalds char *page; 2049445b5b49SHorst Hummel struct ccw1 *first, *last, *fail, *from, *to; 2050445b5b49SHorst Hummel int len, sl, sct; 20511da177e4SLinus Torvalds 20521da177e4SLinus Torvalds page = (char *) get_zeroed_page(GFP_ATOMIC); 20531da177e4SLinus Torvalds if (page == NULL) { 20541da177e4SLinus Torvalds DEV_MESSAGE(KERN_ERR, device, " %s", 20551da177e4SLinus Torvalds "No memory to dump sense data"); 20561da177e4SLinus Torvalds return; 20571da177e4SLinus Torvalds } 2058445b5b49SHorst Hummel /* dump the sense data */ 20591da177e4SLinus Torvalds len = sprintf(page, KERN_ERR PRINTK_HEADER 20601da177e4SLinus Torvalds " I/O status report for device %s:\n", 20611da177e4SLinus Torvalds device->cdev->dev.bus_id); 20621da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 20631da177e4SLinus Torvalds " in req: %p CS: 0x%02X DS: 0x%02X\n", req, 20641da177e4SLinus Torvalds irb->scsw.cstat, irb->scsw.dstat); 20651da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 20661da177e4SLinus Torvalds " device %s: Failing CCW: %p\n", 20671da177e4SLinus Torvalds device->cdev->dev.bus_id, 20681da177e4SLinus Torvalds (void *) (addr_t) irb->scsw.cpa); 20691da177e4SLinus Torvalds if (irb->esw.esw0.erw.cons) { 20701da177e4SLinus Torvalds for (sl = 0; sl < 4; sl++) { 20711da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 20721da177e4SLinus Torvalds " Sense(hex) %2d-%2d:", 20731da177e4SLinus Torvalds (8 * sl), ((8 * sl) + 7)); 20741da177e4SLinus Torvalds 20751da177e4SLinus Torvalds for (sct = 0; sct < 8; sct++) { 20761da177e4SLinus Torvalds len += sprintf(page + len, " %02x", 20771da177e4SLinus Torvalds irb->ecw[8 * sl + sct]); 20781da177e4SLinus Torvalds } 20791da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 20801da177e4SLinus Torvalds } 20811da177e4SLinus Torvalds 20821da177e4SLinus Torvalds if (irb->ecw[27] & DASD_SENSE_BIT_0) { 20831da177e4SLinus Torvalds /* 24 Byte Sense Data */ 2084445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 20851da177e4SLinus Torvalds " 24 Byte: %x MSG %x, " 20861da177e4SLinus Torvalds "%s MSGb to SYSOP\n", 20871da177e4SLinus Torvalds irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 20881da177e4SLinus Torvalds irb->ecw[1] & 0x10 ? "" : "no"); 20891da177e4SLinus Torvalds } else { 20901da177e4SLinus Torvalds /* 32 Byte Sense Data */ 2091445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 20921da177e4SLinus Torvalds " 32 Byte: Format: %x " 20931da177e4SLinus Torvalds "Exception class %x\n", 20941da177e4SLinus Torvalds irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 20951da177e4SLinus Torvalds } 20961da177e4SLinus Torvalds } else { 2097445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 20981da177e4SLinus Torvalds " SORRY - NO VALID SENSE AVAILABLE\n"); 20991da177e4SLinus Torvalds } 2100445b5b49SHorst Hummel printk("%s", page); 21011da177e4SLinus Torvalds 21028e09f215SStefan Weinhuber if (req) { 21038e09f215SStefan Weinhuber /* req == NULL for unsolicited interrupts */ 2104445b5b49SHorst Hummel /* dump the Channel Program (max 140 Bytes per line) */ 2105445b5b49SHorst Hummel /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 2106445b5b49SHorst Hummel first = req->cpaddr; 2107445b5b49SHorst Hummel for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 2108445b5b49SHorst Hummel to = min(first + 6, last); 21091da177e4SLinus Torvalds len = sprintf(page, KERN_ERR PRINTK_HEADER 21101da177e4SLinus Torvalds " Related CP in req: %p\n", req); 2111445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(first, to, page + len); 2112445b5b49SHorst Hummel printk("%s", page); 21131da177e4SLinus Torvalds 2114445b5b49SHorst Hummel /* print failing CCW area (maximum 4) */ 2115445b5b49SHorst Hummel /* scsw->cda is either valid or zero */ 21161da177e4SLinus Torvalds len = 0; 2117445b5b49SHorst Hummel from = ++to; 2118445b5b49SHorst Hummel fail = (struct ccw1 *)(addr_t) irb->scsw.cpa; /* failing CCW */ 2119445b5b49SHorst Hummel if (from < fail - 2) { 2120445b5b49SHorst Hummel from = fail - 2; /* there is a gap - print header */ 2121445b5b49SHorst Hummel len += sprintf(page, KERN_ERR PRINTK_HEADER "......\n"); 21221da177e4SLinus Torvalds } 2123445b5b49SHorst Hummel to = min(fail + 1, last); 2124445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, to, page + len); 21251da177e4SLinus Torvalds 2126445b5b49SHorst Hummel /* print last CCWs (maximum 2) */ 2127445b5b49SHorst Hummel from = max(from, ++to); 2128445b5b49SHorst Hummel if (from < last - 1) { 2129445b5b49SHorst Hummel from = last - 1; /* there is a gap - print header */ 21301da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n"); 21311da177e4SLinus Torvalds } 2132445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, last, page + len); 21331da177e4SLinus Torvalds if (len > 0) 2134445b5b49SHorst Hummel printk("%s", page); 21358e09f215SStefan Weinhuber } 21361da177e4SLinus Torvalds free_page((unsigned long) page); 21371da177e4SLinus Torvalds } 21381da177e4SLinus Torvalds 21391da177e4SLinus Torvalds /* 21401da177e4SLinus Torvalds * max_blocks is dependent on the amount of storage that is available 21411da177e4SLinus Torvalds * in the static io buffer for each device. Currently each device has 21421da177e4SLinus Torvalds * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has 21431da177e4SLinus Torvalds * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use 21441da177e4SLinus Torvalds * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In 21451da177e4SLinus Torvalds * addition we have one define extent ccw + 16 bytes of data and one 21461da177e4SLinus Torvalds * locate record ccw + 16 bytes of data. That makes: 21471da177e4SLinus Torvalds * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. 21481da177e4SLinus Torvalds * We want to fit two into the available memory so that we can immediately 21491da177e4SLinus Torvalds * start the next request if one finishes off. That makes 249.5 blocks 21501da177e4SLinus Torvalds * for one request. Give a little safety and the result is 240. 21511da177e4SLinus Torvalds */ 21521da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline = { 21531da177e4SLinus Torvalds .owner = THIS_MODULE, 21541da177e4SLinus Torvalds .name = "ECKD", 21551da177e4SLinus Torvalds .ebcname = "ECKD", 21561da177e4SLinus Torvalds .max_blocks = 240, 21571da177e4SLinus Torvalds .check_device = dasd_eckd_check_characteristics, 21588e09f215SStefan Weinhuber .uncheck_device = dasd_eckd_uncheck_device, 21591da177e4SLinus Torvalds .do_analysis = dasd_eckd_do_analysis, 21608e09f215SStefan Weinhuber .ready_to_online = dasd_eckd_ready_to_online, 21618e09f215SStefan Weinhuber .online_to_ready = dasd_eckd_online_to_ready, 21621da177e4SLinus Torvalds .fill_geometry = dasd_eckd_fill_geometry, 21631da177e4SLinus Torvalds .start_IO = dasd_start_IO, 21641da177e4SLinus Torvalds .term_IO = dasd_term_IO, 21658e09f215SStefan Weinhuber .handle_terminated_request = dasd_eckd_handle_terminated_request, 21661da177e4SLinus Torvalds .format_device = dasd_eckd_format_device, 21671da177e4SLinus Torvalds .erp_action = dasd_eckd_erp_action, 21681da177e4SLinus Torvalds .erp_postaction = dasd_eckd_erp_postaction, 21698e09f215SStefan Weinhuber .handle_unsolicited_interrupt = dasd_eckd_handle_unsolicited_interrupt, 21708e09f215SStefan Weinhuber .build_cp = dasd_eckd_build_alias_cp, 21718e09f215SStefan Weinhuber .free_cp = dasd_eckd_free_alias_cp, 21721da177e4SLinus Torvalds .dump_sense = dasd_eckd_dump_sense, 21731da177e4SLinus Torvalds .fill_info = dasd_eckd_fill_info, 21741107ccfbSChristoph Hellwig .ioctl = dasd_eckd_ioctl, 21751da177e4SLinus Torvalds }; 21761da177e4SLinus Torvalds 21771da177e4SLinus Torvalds static int __init 21781da177e4SLinus Torvalds dasd_eckd_init(void) 21791da177e4SLinus Torvalds { 21801da177e4SLinus Torvalds ASCEBC(dasd_eckd_discipline.ebcname, 4); 218140545573SHorst Hummel return ccw_driver_register(&dasd_eckd_driver); 21821da177e4SLinus Torvalds } 21831da177e4SLinus Torvalds 21841da177e4SLinus Torvalds static void __exit 21851da177e4SLinus Torvalds dasd_eckd_cleanup(void) 21861da177e4SLinus Torvalds { 21871da177e4SLinus Torvalds ccw_driver_unregister(&dasd_eckd_driver); 21881da177e4SLinus Torvalds } 21891da177e4SLinus Torvalds 21901da177e4SLinus Torvalds module_init(dasd_eckd_init); 21911da177e4SLinus Torvalds module_exit(dasd_eckd_cleanup); 2192