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 " 872a0217d5SKay Sievers "for %s\n", dev_name(&cdev->dev)); 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; 3164abb08c2SStefan Weinhuber pfxdata->base_address = basepriv->ned->unit_addr; 3174abb08c2SStefan Weinhuber pfxdata->base_lss = basepriv->ned->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 */ 5394abb08c2SStefan Weinhuber static int dasd_eckd_generate_uid(struct dasd_device *device, 5404abb08c2SStefan Weinhuber struct dasd_uid *uid) 5413d052595SHorst Hummel { 5423d052595SHorst Hummel struct dasd_eckd_private *private; 5434abb08c2SStefan Weinhuber int count; 5443d052595SHorst Hummel 5453d052595SHorst Hummel private = (struct dasd_eckd_private *) device->private; 5463d052595SHorst Hummel if (!private) 5473d052595SHorst Hummel return -ENODEV; 5484abb08c2SStefan Weinhuber if (!private->ned || !private->gneq) 5493d052595SHorst Hummel return -ENODEV; 5503d052595SHorst Hummel 5513d052595SHorst Hummel memset(uid, 0, sizeof(struct dasd_uid)); 5524abb08c2SStefan Weinhuber memcpy(uid->vendor, private->ned->HDA_manufacturer, 5533d052595SHorst Hummel sizeof(uid->vendor) - 1); 5543d052595SHorst Hummel EBCASC(uid->vendor, sizeof(uid->vendor) - 1); 5554abb08c2SStefan Weinhuber memcpy(uid->serial, private->ned->HDA_location, 5563d052595SHorst Hummel sizeof(uid->serial) - 1); 5573d052595SHorst Hummel EBCASC(uid->serial, sizeof(uid->serial) - 1); 5584abb08c2SStefan Weinhuber uid->ssid = private->gneq->subsystemID; 5594abb08c2SStefan Weinhuber uid->real_unit_addr = private->ned->unit_addr;; 5604abb08c2SStefan Weinhuber if (private->sneq) { 5614abb08c2SStefan Weinhuber uid->type = private->sneq->sua_flags; 5628e09f215SStefan Weinhuber if (uid->type == UA_BASE_PAV_ALIAS) 5634abb08c2SStefan Weinhuber uid->base_unit_addr = private->sneq->base_unit_addr; 5648e09f215SStefan Weinhuber } else { 5658e09f215SStefan Weinhuber uid->type = UA_BASE_DEVICE; 5668e09f215SStefan Weinhuber } 5674abb08c2SStefan Weinhuber if (private->vdsneq) { 5684abb08c2SStefan Weinhuber for (count = 0; count < 16; count++) { 5694abb08c2SStefan Weinhuber sprintf(uid->vduit+2*count, "%02x", 5704abb08c2SStefan Weinhuber private->vdsneq->uit[count]); 5714abb08c2SStefan Weinhuber } 5724abb08c2SStefan Weinhuber } 5733d052595SHorst Hummel return 0; 5743d052595SHorst Hummel } 5753d052595SHorst Hummel 576763968e2SHeiko Carstens static struct dasd_ccw_req *dasd_eckd_build_rcd_lpm(struct dasd_device *device, 57717283b56SCornelia Huck void *rcd_buffer, 57817283b56SCornelia Huck struct ciw *ciw, __u8 lpm) 57917283b56SCornelia Huck { 58017283b56SCornelia Huck struct dasd_ccw_req *cqr; 58117283b56SCornelia Huck struct ccw1 *ccw; 58217283b56SCornelia Huck 58317283b56SCornelia Huck cqr = dasd_smalloc_request("ECKD", 1 /* RCD */, ciw->count, device); 58417283b56SCornelia Huck 58517283b56SCornelia Huck if (IS_ERR(cqr)) { 58617283b56SCornelia Huck DEV_MESSAGE(KERN_WARNING, device, "%s", 58717283b56SCornelia Huck "Could not allocate RCD request"); 58817283b56SCornelia Huck return cqr; 58917283b56SCornelia Huck } 59017283b56SCornelia Huck 59117283b56SCornelia Huck ccw = cqr->cpaddr; 59217283b56SCornelia Huck ccw->cmd_code = ciw->cmd; 59317283b56SCornelia Huck ccw->cda = (__u32)(addr_t)rcd_buffer; 59417283b56SCornelia Huck ccw->count = ciw->count; 59517283b56SCornelia Huck 5968e09f215SStefan Weinhuber cqr->startdev = device; 5978e09f215SStefan Weinhuber cqr->memdev = device; 5988e09f215SStefan Weinhuber cqr->block = NULL; 59917283b56SCornelia Huck cqr->expires = 10*HZ; 60017283b56SCornelia Huck cqr->lpm = lpm; 60117283b56SCornelia Huck clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 60217283b56SCornelia Huck cqr->retries = 2; 60317283b56SCornelia Huck cqr->buildclk = get_clock(); 60417283b56SCornelia Huck cqr->status = DASD_CQR_FILLED; 60517283b56SCornelia Huck return cqr; 60617283b56SCornelia Huck } 60717283b56SCornelia Huck 60817283b56SCornelia Huck static int dasd_eckd_read_conf_lpm(struct dasd_device *device, 60917283b56SCornelia Huck void **rcd_buffer, 61017283b56SCornelia Huck int *rcd_buffer_size, __u8 lpm) 61117283b56SCornelia Huck { 61217283b56SCornelia Huck struct ciw *ciw; 61317283b56SCornelia Huck char *rcd_buf = NULL; 61417283b56SCornelia Huck int ret; 61517283b56SCornelia Huck struct dasd_ccw_req *cqr; 61617283b56SCornelia Huck 61717283b56SCornelia Huck /* 61817283b56SCornelia Huck * scan for RCD command in extended SenseID data 61917283b56SCornelia Huck */ 62017283b56SCornelia Huck ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 62117283b56SCornelia Huck if (!ciw || ciw->cmd == 0) { 62217283b56SCornelia Huck ret = -EOPNOTSUPP; 62317283b56SCornelia Huck goto out_error; 62417283b56SCornelia Huck } 62517283b56SCornelia Huck rcd_buf = kzalloc(ciw->count, GFP_KERNEL | GFP_DMA); 62617283b56SCornelia Huck if (!rcd_buf) { 62717283b56SCornelia Huck ret = -ENOMEM; 62817283b56SCornelia Huck goto out_error; 62917283b56SCornelia Huck } 6304abb08c2SStefan Weinhuber 6314abb08c2SStefan Weinhuber /* 6324abb08c2SStefan Weinhuber * buffer has to start with EBCDIC "V1.0" to show 6334abb08c2SStefan Weinhuber * support for virtual device SNEQ 6344abb08c2SStefan Weinhuber */ 6354abb08c2SStefan Weinhuber rcd_buf[0] = 0xE5; 6364abb08c2SStefan Weinhuber rcd_buf[1] = 0xF1; 6374abb08c2SStefan Weinhuber rcd_buf[2] = 0x4B; 6384abb08c2SStefan Weinhuber rcd_buf[3] = 0xF0; 63917283b56SCornelia Huck cqr = dasd_eckd_build_rcd_lpm(device, rcd_buf, ciw, lpm); 64017283b56SCornelia Huck if (IS_ERR(cqr)) { 64117283b56SCornelia Huck ret = PTR_ERR(cqr); 64217283b56SCornelia Huck goto out_error; 64317283b56SCornelia Huck } 64417283b56SCornelia Huck ret = dasd_sleep_on(cqr); 64517283b56SCornelia Huck /* 64617283b56SCornelia Huck * on success we update the user input parms 64717283b56SCornelia Huck */ 6488e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 64917283b56SCornelia Huck if (ret) 65017283b56SCornelia Huck goto out_error; 65117283b56SCornelia Huck 65217283b56SCornelia Huck *rcd_buffer_size = ciw->count; 65317283b56SCornelia Huck *rcd_buffer = rcd_buf; 65417283b56SCornelia Huck return 0; 65517283b56SCornelia Huck out_error: 65617283b56SCornelia Huck kfree(rcd_buf); 65717283b56SCornelia Huck *rcd_buffer = NULL; 65817283b56SCornelia Huck *rcd_buffer_size = 0; 65917283b56SCornelia Huck return ret; 66017283b56SCornelia Huck } 66117283b56SCornelia Huck 6624abb08c2SStefan Weinhuber static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private) 6634abb08c2SStefan Weinhuber { 6644abb08c2SStefan Weinhuber 6654abb08c2SStefan Weinhuber struct dasd_sneq *sneq; 6664abb08c2SStefan Weinhuber int i, count; 6674abb08c2SStefan Weinhuber 6684abb08c2SStefan Weinhuber private->ned = NULL; 6694abb08c2SStefan Weinhuber private->sneq = NULL; 6704abb08c2SStefan Weinhuber private->vdsneq = NULL; 6714abb08c2SStefan Weinhuber private->gneq = NULL; 6724abb08c2SStefan Weinhuber count = private->conf_len / sizeof(struct dasd_sneq); 6734abb08c2SStefan Weinhuber sneq = (struct dasd_sneq *)private->conf_data; 6744abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 6754abb08c2SStefan Weinhuber if (sneq->flags.identifier == 1 && sneq->format == 1) 6764abb08c2SStefan Weinhuber private->sneq = sneq; 6774abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 1 && sneq->format == 4) 6784abb08c2SStefan Weinhuber private->vdsneq = (struct vd_sneq *)sneq; 6794abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 2) 6804abb08c2SStefan Weinhuber private->gneq = (struct dasd_gneq *)sneq; 6814abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 3 && sneq->res1 == 1) 6824abb08c2SStefan Weinhuber private->ned = (struct dasd_ned *)sneq; 6834abb08c2SStefan Weinhuber sneq++; 6844abb08c2SStefan Weinhuber } 6854abb08c2SStefan Weinhuber if (!private->ned || !private->gneq) { 6864abb08c2SStefan Weinhuber private->ned = NULL; 6874abb08c2SStefan Weinhuber private->sneq = NULL; 6884abb08c2SStefan Weinhuber private->vdsneq = NULL; 6894abb08c2SStefan Weinhuber private->gneq = NULL; 6904abb08c2SStefan Weinhuber return -EINVAL; 6914abb08c2SStefan Weinhuber } 6924abb08c2SStefan Weinhuber return 0; 6934abb08c2SStefan Weinhuber 6944abb08c2SStefan Weinhuber }; 6954abb08c2SStefan Weinhuber 6964abb08c2SStefan Weinhuber static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len) 6974abb08c2SStefan Weinhuber { 6984abb08c2SStefan Weinhuber struct dasd_gneq *gneq; 6994abb08c2SStefan Weinhuber int i, count, found; 7004abb08c2SStefan Weinhuber 7014abb08c2SStefan Weinhuber count = conf_len / sizeof(*gneq); 7024abb08c2SStefan Weinhuber gneq = (struct dasd_gneq *)conf_data; 7034abb08c2SStefan Weinhuber found = 0; 7044abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 7054abb08c2SStefan Weinhuber if (gneq->flags.identifier == 2) { 7064abb08c2SStefan Weinhuber found = 1; 7074abb08c2SStefan Weinhuber break; 7084abb08c2SStefan Weinhuber } 7094abb08c2SStefan Weinhuber gneq++; 7104abb08c2SStefan Weinhuber } 7114abb08c2SStefan Weinhuber if (found) 7124abb08c2SStefan Weinhuber return ((char *)gneq)[18] & 0x07; 7134abb08c2SStefan Weinhuber else 7144abb08c2SStefan Weinhuber return 0; 7154abb08c2SStefan Weinhuber } 7164abb08c2SStefan Weinhuber 7174abb08c2SStefan Weinhuber static int dasd_eckd_read_conf(struct dasd_device *device) 7181da177e4SLinus Torvalds { 7191da177e4SLinus Torvalds void *conf_data; 7201da177e4SLinus Torvalds int conf_len, conf_data_saved; 7211da177e4SLinus Torvalds int rc; 7221da177e4SLinus Torvalds __u8 lpm; 7231da177e4SLinus Torvalds struct dasd_eckd_private *private; 7241da177e4SLinus Torvalds struct dasd_eckd_path *path_data; 7251da177e4SLinus Torvalds 7261da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 7271da177e4SLinus Torvalds path_data = (struct dasd_eckd_path *) &private->path_data; 7281da177e4SLinus Torvalds path_data->opm = ccw_device_get_path_mask(device->cdev); 7291da177e4SLinus Torvalds lpm = 0x80; 7301da177e4SLinus Torvalds conf_data_saved = 0; 7311da177e4SLinus Torvalds /* get configuration data per operational path */ 7321da177e4SLinus Torvalds for (lpm = 0x80; lpm; lpm>>= 1) { 7331da177e4SLinus Torvalds if (lpm & path_data->opm){ 73417283b56SCornelia Huck rc = dasd_eckd_read_conf_lpm(device, &conf_data, 7351da177e4SLinus Torvalds &conf_len, lpm); 7361da177e4SLinus Torvalds if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ 7371da177e4SLinus Torvalds MESSAGE(KERN_WARNING, 7381da177e4SLinus Torvalds "Read configuration data returned " 7391da177e4SLinus Torvalds "error %d", rc); 7401da177e4SLinus Torvalds return rc; 7411da177e4SLinus Torvalds } 7421da177e4SLinus Torvalds if (conf_data == NULL) { 7431da177e4SLinus Torvalds MESSAGE(KERN_WARNING, "%s", "No configuration " 7441da177e4SLinus Torvalds "data retrieved"); 745d133a960SGabriel Craciunescu continue; /* no error */ 7461da177e4SLinus Torvalds } 7471da177e4SLinus Torvalds /* save first valid configuration data */ 7481da177e4SLinus Torvalds if (!conf_data_saved) { 7494abb08c2SStefan Weinhuber kfree(private->conf_data); 7504abb08c2SStefan Weinhuber private->conf_data = conf_data; 7514abb08c2SStefan Weinhuber private->conf_len = conf_len; 7524abb08c2SStefan Weinhuber if (dasd_eckd_identify_conf_parts(private)) { 7534abb08c2SStefan Weinhuber private->conf_data = NULL; 7544abb08c2SStefan Weinhuber private->conf_len = 0; 7554abb08c2SStefan Weinhuber kfree(conf_data); 7564abb08c2SStefan Weinhuber continue; 7574abb08c2SStefan Weinhuber } 7581da177e4SLinus Torvalds conf_data_saved++; 7591da177e4SLinus Torvalds } 7604abb08c2SStefan Weinhuber switch (dasd_eckd_path_access(conf_data, conf_len)) { 7611da177e4SLinus Torvalds case 0x02: 7621da177e4SLinus Torvalds path_data->npm |= lpm; 7631da177e4SLinus Torvalds break; 7641da177e4SLinus Torvalds case 0x03: 7651da177e4SLinus Torvalds path_data->ppm |= lpm; 7661da177e4SLinus Torvalds break; 7671da177e4SLinus Torvalds } 7684abb08c2SStefan Weinhuber if (conf_data != private->conf_data) 7691da177e4SLinus Torvalds kfree(conf_data); 7701da177e4SLinus Torvalds } 7711da177e4SLinus Torvalds } 7721da177e4SLinus Torvalds return 0; 7731da177e4SLinus Torvalds } 7741da177e4SLinus Torvalds 7758e09f215SStefan Weinhuber static int dasd_eckd_read_features(struct dasd_device *device) 7768e09f215SStefan Weinhuber { 7778e09f215SStefan Weinhuber struct dasd_psf_prssd_data *prssdp; 7788e09f215SStefan Weinhuber struct dasd_rssd_features *features; 7798e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 7808e09f215SStefan Weinhuber struct ccw1 *ccw; 7818e09f215SStefan Weinhuber int rc; 7828e09f215SStefan Weinhuber struct dasd_eckd_private *private; 7838e09f215SStefan Weinhuber 7848e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 7858e09f215SStefan Weinhuber cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 7868e09f215SStefan Weinhuber 1 /* PSF */ + 1 /* RSSD */ , 7878e09f215SStefan Weinhuber (sizeof(struct dasd_psf_prssd_data) + 7888e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)), 7898e09f215SStefan Weinhuber device); 7908e09f215SStefan Weinhuber if (IS_ERR(cqr)) { 7918e09f215SStefan Weinhuber DEV_MESSAGE(KERN_WARNING, device, "%s", 7928e09f215SStefan Weinhuber "Could not allocate initialization request"); 7938e09f215SStefan Weinhuber return PTR_ERR(cqr); 7948e09f215SStefan Weinhuber } 7958e09f215SStefan Weinhuber cqr->startdev = device; 7968e09f215SStefan Weinhuber cqr->memdev = device; 7978e09f215SStefan Weinhuber cqr->block = NULL; 7988e09f215SStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 7998e09f215SStefan Weinhuber cqr->retries = 5; 8008e09f215SStefan Weinhuber cqr->expires = 10 * HZ; 8018e09f215SStefan Weinhuber 8028e09f215SStefan Weinhuber /* Prepare for Read Subsystem Data */ 8038e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 8048e09f215SStefan Weinhuber memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 8058e09f215SStefan Weinhuber prssdp->order = PSF_ORDER_PRSSD; 8068e09f215SStefan Weinhuber prssdp->suborder = 0x41; /* Read Feature Codes */ 8078e09f215SStefan Weinhuber /* all other bytes of prssdp must be zero */ 8088e09f215SStefan Weinhuber 8098e09f215SStefan Weinhuber ccw = cqr->cpaddr; 8108e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PSF; 8118e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_psf_prssd_data); 8128e09f215SStefan Weinhuber ccw->flags |= CCW_FLAG_CC; 8138e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) prssdp; 8148e09f215SStefan Weinhuber 8158e09f215SStefan Weinhuber /* Read Subsystem Data - feature codes */ 8168e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 8178e09f215SStefan Weinhuber memset(features, 0, sizeof(struct dasd_rssd_features)); 8188e09f215SStefan Weinhuber 8198e09f215SStefan Weinhuber ccw++; 8208e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RSSD; 8218e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_rssd_features); 8228e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) features; 8238e09f215SStefan Weinhuber 8248e09f215SStefan Weinhuber cqr->buildclk = get_clock(); 8258e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 8268e09f215SStefan Weinhuber rc = dasd_sleep_on(cqr); 8278e09f215SStefan Weinhuber if (rc == 0) { 8288e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 8298e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 8308e09f215SStefan Weinhuber memcpy(&private->features, features, 8318e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)); 8328e09f215SStefan Weinhuber } 8338e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 8348e09f215SStefan Weinhuber return rc; 8358e09f215SStefan Weinhuber } 8368e09f215SStefan Weinhuber 8378e09f215SStefan Weinhuber 8383d052595SHorst Hummel /* 83940545573SHorst Hummel * Build CP for Perform Subsystem Function - SSC. 84040545573SHorst Hummel */ 8418e09f215SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device) 84240545573SHorst Hummel { 84340545573SHorst Hummel struct dasd_ccw_req *cqr; 84440545573SHorst Hummel struct dasd_psf_ssc_data *psf_ssc_data; 84540545573SHorst Hummel struct ccw1 *ccw; 84640545573SHorst Hummel 84740545573SHorst Hummel cqr = dasd_smalloc_request("ECKD", 1 /* PSF */ , 84840545573SHorst Hummel sizeof(struct dasd_psf_ssc_data), 84940545573SHorst Hummel device); 85040545573SHorst Hummel 85140545573SHorst Hummel if (IS_ERR(cqr)) { 85240545573SHorst Hummel DEV_MESSAGE(KERN_WARNING, device, "%s", 85340545573SHorst Hummel "Could not allocate PSF-SSC request"); 85440545573SHorst Hummel return cqr; 85540545573SHorst Hummel } 85640545573SHorst Hummel psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 85740545573SHorst Hummel psf_ssc_data->order = PSF_ORDER_SSC; 8588e09f215SStefan Weinhuber psf_ssc_data->suborder = 0x88; 8598e09f215SStefan Weinhuber psf_ssc_data->reserved[0] = 0x88; 86040545573SHorst Hummel 86140545573SHorst Hummel ccw = cqr->cpaddr; 86240545573SHorst Hummel ccw->cmd_code = DASD_ECKD_CCW_PSF; 86340545573SHorst Hummel ccw->cda = (__u32)(addr_t)psf_ssc_data; 86440545573SHorst Hummel ccw->count = 66; 86540545573SHorst Hummel 8668e09f215SStefan Weinhuber cqr->startdev = device; 8678e09f215SStefan Weinhuber cqr->memdev = device; 8688e09f215SStefan Weinhuber cqr->block = NULL; 86940545573SHorst Hummel cqr->expires = 10*HZ; 87040545573SHorst Hummel cqr->buildclk = get_clock(); 87140545573SHorst Hummel cqr->status = DASD_CQR_FILLED; 87240545573SHorst Hummel return cqr; 87340545573SHorst Hummel } 87440545573SHorst Hummel 87540545573SHorst Hummel /* 87640545573SHorst Hummel * Perform Subsystem Function. 87740545573SHorst Hummel * It is necessary to trigger CIO for channel revalidation since this 87840545573SHorst Hummel * call might change behaviour of DASD devices. 87940545573SHorst Hummel */ 88040545573SHorst Hummel static int 88140545573SHorst Hummel dasd_eckd_psf_ssc(struct dasd_device *device) 88240545573SHorst Hummel { 88340545573SHorst Hummel struct dasd_ccw_req *cqr; 88440545573SHorst Hummel int rc; 88540545573SHorst Hummel 88640545573SHorst Hummel cqr = dasd_eckd_build_psf_ssc(device); 88740545573SHorst Hummel if (IS_ERR(cqr)) 88840545573SHorst Hummel return PTR_ERR(cqr); 88940545573SHorst Hummel 89040545573SHorst Hummel rc = dasd_sleep_on(cqr); 89140545573SHorst Hummel if (!rc) 89240545573SHorst Hummel /* trigger CIO to reprobe devices */ 89340545573SHorst Hummel css_schedule_reprobe(); 8948e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 89540545573SHorst Hummel return rc; 89640545573SHorst Hummel } 89740545573SHorst Hummel 89840545573SHorst Hummel /* 89940545573SHorst Hummel * Valide storage server of current device. 90040545573SHorst Hummel */ 9018e09f215SStefan Weinhuber static int dasd_eckd_validate_server(struct dasd_device *device) 90240545573SHorst Hummel { 90340545573SHorst Hummel int rc; 9048e09f215SStefan Weinhuber struct dasd_eckd_private *private; 90540545573SHorst Hummel 90640545573SHorst Hummel /* Currently PAV is the only reason to 'validate' server on LPAR */ 90740545573SHorst Hummel if (dasd_nopav || MACHINE_IS_VM) 90840545573SHorst Hummel return 0; 90940545573SHorst Hummel 91040545573SHorst Hummel rc = dasd_eckd_psf_ssc(device); 91140545573SHorst Hummel /* may be requested feature is not available on server, 91240545573SHorst Hummel * therefore just report error and go ahead */ 9138e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 91440545573SHorst Hummel DEV_MESSAGE(KERN_INFO, device, 9158e79a441SHorst Hummel "PSF-SSC on storage subsystem %s.%s.%04x returned rc=%d", 9168e09f215SStefan Weinhuber private->uid.vendor, private->uid.serial, 9178e09f215SStefan Weinhuber private->uid.ssid, rc); 91840545573SHorst Hummel /* RE-Read Configuration Data */ 91940545573SHorst Hummel return dasd_eckd_read_conf(device); 92040545573SHorst Hummel } 92140545573SHorst Hummel 92240545573SHorst Hummel /* 9233d052595SHorst Hummel * Check device characteristics. 9243d052595SHorst Hummel * If the device is accessible using ECKD discipline, the device is enabled. 9253d052595SHorst Hummel */ 9261da177e4SLinus Torvalds static int 9271da177e4SLinus Torvalds dasd_eckd_check_characteristics(struct dasd_device *device) 9281da177e4SLinus Torvalds { 9291da177e4SLinus Torvalds struct dasd_eckd_private *private; 9308e09f215SStefan Weinhuber struct dasd_block *block; 9311da177e4SLinus Torvalds void *rdc_data; 9328e09f215SStefan Weinhuber int is_known, rc; 9331da177e4SLinus Torvalds 9341da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 9351da177e4SLinus Torvalds if (private == NULL) { 936138c014dSHorst Hummel private = kzalloc(sizeof(struct dasd_eckd_private), 9371da177e4SLinus Torvalds GFP_KERNEL | GFP_DMA); 9381da177e4SLinus Torvalds if (private == NULL) { 9391da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 9401da177e4SLinus Torvalds "memory allocation failed for private " 9411da177e4SLinus Torvalds "data"); 9421da177e4SLinus Torvalds return -ENOMEM; 9431da177e4SLinus Torvalds } 9441da177e4SLinus Torvalds device->private = (void *) private; 9451da177e4SLinus Torvalds } 9461da177e4SLinus Torvalds /* Invalidate status of initial analysis. */ 9471da177e4SLinus Torvalds private->init_cqr_status = -1; 9481da177e4SLinus Torvalds /* Set default cache operations. */ 9491da177e4SLinus Torvalds private->attrib.operation = DASD_NORMAL_CACHE; 9501da177e4SLinus Torvalds private->attrib.nr_cyl = 0; 9511da177e4SLinus Torvalds 95240545573SHorst Hummel /* Read Configuration Data */ 95340545573SHorst Hummel rc = dasd_eckd_read_conf(device); 95440545573SHorst Hummel if (rc) 9558e09f215SStefan Weinhuber goto out_err1; 95640545573SHorst Hummel 95740545573SHorst Hummel /* Generate device unique id and register in devmap */ 9588e09f215SStefan Weinhuber rc = dasd_eckd_generate_uid(device, &private->uid); 95940545573SHorst Hummel if (rc) 9608e09f215SStefan Weinhuber goto out_err1; 9618e09f215SStefan Weinhuber dasd_set_uid(device->cdev, &private->uid); 9628e09f215SStefan Weinhuber 9638e09f215SStefan Weinhuber if (private->uid.type == UA_BASE_DEVICE) { 9648e09f215SStefan Weinhuber block = dasd_alloc_block(); 9658e09f215SStefan Weinhuber if (IS_ERR(block)) { 9668e09f215SStefan Weinhuber DEV_MESSAGE(KERN_WARNING, device, "%s", 9678e09f215SStefan Weinhuber "could not allocate dasd block structure"); 9688e09f215SStefan Weinhuber rc = PTR_ERR(block); 9698e09f215SStefan Weinhuber goto out_err1; 9708e09f215SStefan Weinhuber } 9718e09f215SStefan Weinhuber device->block = block; 9728e09f215SStefan Weinhuber block->base = device; 9738e09f215SStefan Weinhuber } 9748e09f215SStefan Weinhuber 9758e09f215SStefan Weinhuber /* register lcu with alias handling, enable PAV if this is a new lcu */ 9768e09f215SStefan Weinhuber is_known = dasd_alias_make_device_known_to_lcu(device); 9778e09f215SStefan Weinhuber if (is_known < 0) { 9788e09f215SStefan Weinhuber rc = is_known; 9798e09f215SStefan Weinhuber goto out_err2; 9808e09f215SStefan Weinhuber } 9818e09f215SStefan Weinhuber if (!is_known) { 9828e09f215SStefan Weinhuber /* new lcu found */ 9838e09f215SStefan Weinhuber rc = dasd_eckd_validate_server(device); /* will switch pav on */ 98440545573SHorst Hummel if (rc) 9858e09f215SStefan Weinhuber goto out_err3; 9868e09f215SStefan Weinhuber } 9878e09f215SStefan Weinhuber 9888e09f215SStefan Weinhuber /* Read Feature Codes */ 9898e09f215SStefan Weinhuber rc = dasd_eckd_read_features(device); 9908e09f215SStefan Weinhuber if (rc) 9918e09f215SStefan Weinhuber goto out_err3; 99240545573SHorst Hummel 9931da177e4SLinus Torvalds /* Read Device Characteristics */ 9941da177e4SLinus Torvalds rdc_data = (void *) &(private->rdc_data); 9953d052595SHorst Hummel memset(rdc_data, 0, sizeof(rdc_data)); 99617283b56SCornelia Huck rc = dasd_generic_read_dev_chars(device, "ECKD", &rdc_data, 64); 9978e09f215SStefan Weinhuber if (rc) { 9981da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, 99940545573SHorst Hummel "Read device characteristics returned " 100040545573SHorst Hummel "rc=%d", rc); 10018e09f215SStefan Weinhuber goto out_err3; 10028e09f215SStefan Weinhuber } 10031da177e4SLinus Torvalds DEV_MESSAGE(KERN_INFO, device, 10041da177e4SLinus Torvalds "%04X/%02X(CU:%04X/%02X) Cyl:%d Head:%d Sec:%d", 10051da177e4SLinus Torvalds private->rdc_data.dev_type, 10061da177e4SLinus Torvalds private->rdc_data.dev_model, 10071da177e4SLinus Torvalds private->rdc_data.cu_type, 10081da177e4SLinus Torvalds private->rdc_data.cu_model.model, 10091da177e4SLinus Torvalds private->rdc_data.no_cyl, 10101da177e4SLinus Torvalds private->rdc_data.trk_per_cyl, 10111da177e4SLinus Torvalds private->rdc_data.sec_per_trk); 10128e09f215SStefan Weinhuber return 0; 10138e09f215SStefan Weinhuber 10148e09f215SStefan Weinhuber out_err3: 10158e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 10168e09f215SStefan Weinhuber out_err2: 10178e09f215SStefan Weinhuber dasd_free_block(device->block); 10188e09f215SStefan Weinhuber device->block = NULL; 10198e09f215SStefan Weinhuber out_err1: 10204abb08c2SStefan Weinhuber kfree(private->conf_data); 10218e09f215SStefan Weinhuber kfree(device->private); 10228e09f215SStefan Weinhuber device->private = NULL; 10233d052595SHorst Hummel return rc; 10241da177e4SLinus Torvalds } 10251da177e4SLinus Torvalds 10268e09f215SStefan Weinhuber static void dasd_eckd_uncheck_device(struct dasd_device *device) 10278e09f215SStefan Weinhuber { 10284abb08c2SStefan Weinhuber struct dasd_eckd_private *private; 10294abb08c2SStefan Weinhuber 10304abb08c2SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 10318e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 10324abb08c2SStefan Weinhuber private->ned = NULL; 10334abb08c2SStefan Weinhuber private->sneq = NULL; 10344abb08c2SStefan Weinhuber private->vdsneq = NULL; 10354abb08c2SStefan Weinhuber private->gneq = NULL; 10364abb08c2SStefan Weinhuber private->conf_len = 0; 10374abb08c2SStefan Weinhuber kfree(private->conf_data); 10384abb08c2SStefan Weinhuber private->conf_data = NULL; 10398e09f215SStefan Weinhuber } 10408e09f215SStefan Weinhuber 10411da177e4SLinus Torvalds static struct dasd_ccw_req * 10421da177e4SLinus Torvalds dasd_eckd_analysis_ccw(struct dasd_device *device) 10431da177e4SLinus Torvalds { 10441da177e4SLinus Torvalds struct dasd_eckd_private *private; 10451da177e4SLinus Torvalds struct eckd_count *count_data; 10461da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 10471da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 10481da177e4SLinus Torvalds struct ccw1 *ccw; 10491da177e4SLinus Torvalds int cplength, datasize; 10501da177e4SLinus Torvalds int i; 10511da177e4SLinus Torvalds 10521da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 10531da177e4SLinus Torvalds 10541da177e4SLinus Torvalds cplength = 8; 10551da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 10561da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 10571da177e4SLinus Torvalds cplength, datasize, device); 10581da177e4SLinus Torvalds if (IS_ERR(cqr)) 10591da177e4SLinus Torvalds return cqr; 10601da177e4SLinus Torvalds ccw = cqr->cpaddr; 10611da177e4SLinus Torvalds /* Define extent for the first 3 tracks. */ 10621da177e4SLinus Torvalds define_extent(ccw++, cqr->data, 0, 2, 10631da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device); 10641da177e4SLinus Torvalds LO_data = cqr->data + sizeof(struct DE_eckd_data); 10651da177e4SLinus Torvalds /* Locate record for the first 4 records on track 0. */ 10661da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 10671da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 0, 0, 4, 10681da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 10691da177e4SLinus Torvalds 10701da177e4SLinus Torvalds count_data = private->count_area; 10711da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 10721da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 10731da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 10741da177e4SLinus Torvalds ccw->flags = 0; 10751da177e4SLinus Torvalds ccw->count = 8; 10761da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 10771da177e4SLinus Torvalds ccw++; 10781da177e4SLinus Torvalds count_data++; 10791da177e4SLinus Torvalds } 10801da177e4SLinus Torvalds 10811da177e4SLinus Torvalds /* Locate record for the first record on track 2. */ 10821da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 10831da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 2, 0, 1, 10841da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 10851da177e4SLinus Torvalds /* Read count ccw. */ 10861da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 10871da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 10881da177e4SLinus Torvalds ccw->flags = 0; 10891da177e4SLinus Torvalds ccw->count = 8; 10901da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 10911da177e4SLinus Torvalds 10928e09f215SStefan Weinhuber cqr->block = NULL; 10938e09f215SStefan Weinhuber cqr->startdev = device; 10948e09f215SStefan Weinhuber cqr->memdev = device; 10951da177e4SLinus Torvalds cqr->retries = 0; 10961da177e4SLinus Torvalds cqr->buildclk = get_clock(); 10971da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 10981da177e4SLinus Torvalds return cqr; 10991da177e4SLinus Torvalds } 11001da177e4SLinus Torvalds 11011da177e4SLinus Torvalds /* 11021da177e4SLinus Torvalds * This is the callback function for the init_analysis cqr. It saves 11031da177e4SLinus Torvalds * the status of the initial analysis ccw before it frees it and kicks 11041da177e4SLinus Torvalds * the device to continue the startup sequence. This will call 11051da177e4SLinus Torvalds * dasd_eckd_do_analysis again (if the devices has not been marked 11061da177e4SLinus Torvalds * for deletion in the meantime). 11071da177e4SLinus Torvalds */ 11081da177e4SLinus Torvalds static void 11091da177e4SLinus Torvalds dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, void *data) 11101da177e4SLinus Torvalds { 11111da177e4SLinus Torvalds struct dasd_eckd_private *private; 11121da177e4SLinus Torvalds struct dasd_device *device; 11131da177e4SLinus Torvalds 11148e09f215SStefan Weinhuber device = init_cqr->startdev; 11151da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 11161da177e4SLinus Torvalds private->init_cqr_status = init_cqr->status; 11171da177e4SLinus Torvalds dasd_sfree_request(init_cqr, device); 11181da177e4SLinus Torvalds dasd_kick_device(device); 11191da177e4SLinus Torvalds } 11201da177e4SLinus Torvalds 11211da177e4SLinus Torvalds static int 11228e09f215SStefan Weinhuber dasd_eckd_start_analysis(struct dasd_block *block) 11231da177e4SLinus Torvalds { 11241da177e4SLinus Torvalds struct dasd_eckd_private *private; 11251da177e4SLinus Torvalds struct dasd_ccw_req *init_cqr; 11261da177e4SLinus Torvalds 11278e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 11288e09f215SStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(block->base); 11291da177e4SLinus Torvalds if (IS_ERR(init_cqr)) 11301da177e4SLinus Torvalds return PTR_ERR(init_cqr); 11311da177e4SLinus Torvalds init_cqr->callback = dasd_eckd_analysis_callback; 11321da177e4SLinus Torvalds init_cqr->callback_data = NULL; 11331da177e4SLinus Torvalds init_cqr->expires = 5*HZ; 11341da177e4SLinus Torvalds dasd_add_request_head(init_cqr); 11351da177e4SLinus Torvalds return -EAGAIN; 11361da177e4SLinus Torvalds } 11371da177e4SLinus Torvalds 11381da177e4SLinus Torvalds static int 11398e09f215SStefan Weinhuber dasd_eckd_end_analysis(struct dasd_block *block) 11401da177e4SLinus Torvalds { 11418e09f215SStefan Weinhuber struct dasd_device *device; 11421da177e4SLinus Torvalds struct dasd_eckd_private *private; 11431da177e4SLinus Torvalds struct eckd_count *count_area; 11441da177e4SLinus Torvalds unsigned int sb, blk_per_trk; 11451da177e4SLinus Torvalds int status, i; 11461da177e4SLinus Torvalds 11478e09f215SStefan Weinhuber device = block->base; 11481da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 11491da177e4SLinus Torvalds status = private->init_cqr_status; 11501da177e4SLinus Torvalds private->init_cqr_status = -1; 11511da177e4SLinus Torvalds if (status != DASD_CQR_DONE) { 11521da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 11531da177e4SLinus Torvalds "volume analysis returned unformatted disk"); 11541da177e4SLinus Torvalds return -EMEDIUMTYPE; 11551da177e4SLinus Torvalds } 11561da177e4SLinus Torvalds 11571da177e4SLinus Torvalds private->uses_cdl = 1; 11581da177e4SLinus Torvalds /* Calculate number of blocks/records per track. */ 11598e09f215SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 11601da177e4SLinus Torvalds /* Check Track 0 for Compatible Disk Layout */ 11611da177e4SLinus Torvalds count_area = NULL; 11621da177e4SLinus Torvalds for (i = 0; i < 3; i++) { 11631da177e4SLinus Torvalds if (private->count_area[i].kl != 4 || 11641da177e4SLinus Torvalds private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4) { 11651da177e4SLinus Torvalds private->uses_cdl = 0; 11661da177e4SLinus Torvalds break; 11671da177e4SLinus Torvalds } 11681da177e4SLinus Torvalds } 11691da177e4SLinus Torvalds if (i == 3) 11701da177e4SLinus Torvalds count_area = &private->count_area[4]; 11711da177e4SLinus Torvalds 11721da177e4SLinus Torvalds if (private->uses_cdl == 0) { 11731da177e4SLinus Torvalds for (i = 0; i < 5; i++) { 11741da177e4SLinus Torvalds if ((private->count_area[i].kl != 0) || 11751da177e4SLinus Torvalds (private->count_area[i].dl != 11761da177e4SLinus Torvalds private->count_area[0].dl)) 11771da177e4SLinus Torvalds break; 11781da177e4SLinus Torvalds } 11791da177e4SLinus Torvalds if (i == 5) 11801da177e4SLinus Torvalds count_area = &private->count_area[0]; 11811da177e4SLinus Torvalds } else { 11821da177e4SLinus Torvalds if (private->count_area[3].record == 1) 11831da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 11841da177e4SLinus Torvalds "Trk 0: no records after VTOC!"); 11851da177e4SLinus Torvalds } 11861da177e4SLinus Torvalds if (count_area != NULL && count_area->kl == 0) { 11871da177e4SLinus Torvalds /* we found notthing violating our disk layout */ 11881da177e4SLinus Torvalds if (dasd_check_blocksize(count_area->dl) == 0) 11898e09f215SStefan Weinhuber block->bp_block = count_area->dl; 11901da177e4SLinus Torvalds } 11918e09f215SStefan Weinhuber if (block->bp_block == 0) { 11921da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 11931da177e4SLinus Torvalds "Volume has incompatible disk layout"); 11941da177e4SLinus Torvalds return -EMEDIUMTYPE; 11951da177e4SLinus Torvalds } 11968e09f215SStefan Weinhuber block->s2b_shift = 0; /* bits to shift 512 to get a block */ 11978e09f215SStefan Weinhuber for (sb = 512; sb < block->bp_block; sb = sb << 1) 11988e09f215SStefan Weinhuber block->s2b_shift++; 11991da177e4SLinus Torvalds 12008e09f215SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 12018e09f215SStefan Weinhuber block->blocks = (private->rdc_data.no_cyl * 12021da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 12031da177e4SLinus Torvalds blk_per_trk); 12041da177e4SLinus Torvalds 12051da177e4SLinus Torvalds DEV_MESSAGE(KERN_INFO, device, 12061da177e4SLinus Torvalds "(%dkB blks): %dkB at %dkB/trk %s", 12078e09f215SStefan Weinhuber (block->bp_block >> 10), 12081da177e4SLinus Torvalds ((private->rdc_data.no_cyl * 12091da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 12108e09f215SStefan Weinhuber blk_per_trk * (block->bp_block >> 9)) >> 1), 12118e09f215SStefan Weinhuber ((blk_per_trk * block->bp_block) >> 10), 12121da177e4SLinus Torvalds private->uses_cdl ? 12131da177e4SLinus Torvalds "compatible disk layout" : "linux disk layout"); 12141da177e4SLinus Torvalds 12151da177e4SLinus Torvalds return 0; 12161da177e4SLinus Torvalds } 12171da177e4SLinus Torvalds 12188e09f215SStefan Weinhuber static int dasd_eckd_do_analysis(struct dasd_block *block) 12191da177e4SLinus Torvalds { 12201da177e4SLinus Torvalds struct dasd_eckd_private *private; 12211da177e4SLinus Torvalds 12228e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 12231da177e4SLinus Torvalds if (private->init_cqr_status < 0) 12248e09f215SStefan Weinhuber return dasd_eckd_start_analysis(block); 12251da177e4SLinus Torvalds else 12268e09f215SStefan Weinhuber return dasd_eckd_end_analysis(block); 12271da177e4SLinus Torvalds } 12281da177e4SLinus Torvalds 12298e09f215SStefan Weinhuber static int dasd_eckd_ready_to_online(struct dasd_device *device) 12308e09f215SStefan Weinhuber { 12318e09f215SStefan Weinhuber return dasd_alias_add_device(device); 12328e09f215SStefan Weinhuber }; 12338e09f215SStefan Weinhuber 12348e09f215SStefan Weinhuber static int dasd_eckd_online_to_ready(struct dasd_device *device) 12358e09f215SStefan Weinhuber { 12368e09f215SStefan Weinhuber return dasd_alias_remove_device(device); 12378e09f215SStefan Weinhuber }; 12388e09f215SStefan Weinhuber 12391da177e4SLinus Torvalds static int 12408e09f215SStefan Weinhuber dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 12411da177e4SLinus Torvalds { 12421da177e4SLinus Torvalds struct dasd_eckd_private *private; 12431da177e4SLinus Torvalds 12448e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 12458e09f215SStefan Weinhuber if (dasd_check_blocksize(block->bp_block) == 0) { 12461da177e4SLinus Torvalds geo->sectors = recs_per_track(&private->rdc_data, 12478e09f215SStefan Weinhuber 0, block->bp_block); 12481da177e4SLinus Torvalds } 12491da177e4SLinus Torvalds geo->cylinders = private->rdc_data.no_cyl; 12501da177e4SLinus Torvalds geo->heads = private->rdc_data.trk_per_cyl; 12511da177e4SLinus Torvalds return 0; 12521da177e4SLinus Torvalds } 12531da177e4SLinus Torvalds 12541da177e4SLinus Torvalds static struct dasd_ccw_req * 12551da177e4SLinus Torvalds dasd_eckd_format_device(struct dasd_device * device, 12561da177e4SLinus Torvalds struct format_data_t * fdata) 12571da177e4SLinus Torvalds { 12581da177e4SLinus Torvalds struct dasd_eckd_private *private; 12591da177e4SLinus Torvalds struct dasd_ccw_req *fcp; 12601da177e4SLinus Torvalds struct eckd_count *ect; 12611da177e4SLinus Torvalds struct ccw1 *ccw; 12621da177e4SLinus Torvalds void *data; 12631da177e4SLinus Torvalds int rpt, cyl, head; 12641da177e4SLinus Torvalds int cplength, datasize; 12651da177e4SLinus Torvalds int i; 12661da177e4SLinus Torvalds 12671da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 12681da177e4SLinus Torvalds rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize); 12691da177e4SLinus Torvalds cyl = fdata->start_unit / private->rdc_data.trk_per_cyl; 12701da177e4SLinus Torvalds head = fdata->start_unit % private->rdc_data.trk_per_cyl; 12711da177e4SLinus Torvalds 12721da177e4SLinus Torvalds /* Sanity checks. */ 12731da177e4SLinus Torvalds if (fdata->start_unit >= 12741da177e4SLinus Torvalds (private->rdc_data.no_cyl * private->rdc_data.trk_per_cyl)) { 12751da177e4SLinus Torvalds DEV_MESSAGE(KERN_INFO, device, "Track no %d too big!", 12761da177e4SLinus Torvalds fdata->start_unit); 12771da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 12781da177e4SLinus Torvalds } 12791da177e4SLinus Torvalds if (fdata->start_unit > fdata->stop_unit) { 12801da177e4SLinus Torvalds DEV_MESSAGE(KERN_INFO, device, "Track %d reached! ending.", 12811da177e4SLinus Torvalds fdata->start_unit); 12821da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 12831da177e4SLinus Torvalds } 12841da177e4SLinus Torvalds if (dasd_check_blocksize(fdata->blksize) != 0) { 12851da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, 12861da177e4SLinus Torvalds "Invalid blocksize %d...terminating!", 12871da177e4SLinus Torvalds fdata->blksize); 12881da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 12891da177e4SLinus Torvalds } 12901da177e4SLinus Torvalds 12911da177e4SLinus Torvalds /* 12921da177e4SLinus Torvalds * fdata->intensity is a bit string that tells us what to do: 12931da177e4SLinus Torvalds * Bit 0: write record zero 12941da177e4SLinus Torvalds * Bit 1: write home address, currently not supported 12951da177e4SLinus Torvalds * Bit 2: invalidate tracks 12961da177e4SLinus Torvalds * Bit 3: use OS/390 compatible disk layout (cdl) 12971da177e4SLinus Torvalds * Only some bit combinations do make sense. 12981da177e4SLinus Torvalds */ 12991da177e4SLinus Torvalds switch (fdata->intensity) { 13001da177e4SLinus Torvalds case 0x00: /* Normal format */ 13011da177e4SLinus Torvalds case 0x08: /* Normal format, use cdl. */ 13021da177e4SLinus Torvalds cplength = 2 + rpt; 13031da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 13041da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 13051da177e4SLinus Torvalds rpt * sizeof(struct eckd_count); 13061da177e4SLinus Torvalds break; 13071da177e4SLinus Torvalds case 0x01: /* Write record zero and format track. */ 13081da177e4SLinus Torvalds case 0x09: /* Write record zero and format track, use cdl. */ 13091da177e4SLinus Torvalds cplength = 3 + rpt; 13101da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 13111da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 13121da177e4SLinus Torvalds sizeof(struct eckd_count) + 13131da177e4SLinus Torvalds rpt * sizeof(struct eckd_count); 13141da177e4SLinus Torvalds break; 13151da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 13161da177e4SLinus Torvalds case 0x0c: /* Invalidate track, use cdl. */ 13171da177e4SLinus Torvalds cplength = 3; 13181da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 13191da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 13201da177e4SLinus Torvalds sizeof(struct eckd_count); 13211da177e4SLinus Torvalds break; 13221da177e4SLinus Torvalds default: 13231da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "Invalid flags 0x%x.", 13241da177e4SLinus Torvalds fdata->intensity); 13251da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 13261da177e4SLinus Torvalds } 13271da177e4SLinus Torvalds /* Allocate the format ccw request. */ 13281da177e4SLinus Torvalds fcp = dasd_smalloc_request(dasd_eckd_discipline.name, 13291da177e4SLinus Torvalds cplength, datasize, device); 13301da177e4SLinus Torvalds if (IS_ERR(fcp)) 13311da177e4SLinus Torvalds return fcp; 13321da177e4SLinus Torvalds 13331da177e4SLinus Torvalds data = fcp->data; 13341da177e4SLinus Torvalds ccw = fcp->cpaddr; 13351da177e4SLinus Torvalds 13361da177e4SLinus Torvalds switch (fdata->intensity & ~0x08) { 13371da177e4SLinus Torvalds case 0x00: /* Normal format. */ 13381da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 13391da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 13401da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device); 13411da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 13421da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 13431da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 13441da177e4SLinus Torvalds fdata->start_unit, 0, rpt, 13451da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device, 13461da177e4SLinus Torvalds fdata->blksize); 13471da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 13481da177e4SLinus Torvalds break; 13491da177e4SLinus Torvalds case 0x01: /* Write record zero + format track. */ 13501da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 13511da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 13521da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, 13531da177e4SLinus Torvalds device); 13541da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 13551da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 13561da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 13571da177e4SLinus Torvalds fdata->start_unit, 0, rpt + 1, 13581da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, device, 13598e09f215SStefan Weinhuber device->block->bp_block); 13601da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 13611da177e4SLinus Torvalds break; 13621da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 13631da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 13641da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 13651da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device); 13661da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 13671da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 13681da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 13691da177e4SLinus Torvalds fdata->start_unit, 0, 1, 13701da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device, 8); 13711da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 13721da177e4SLinus Torvalds break; 13731da177e4SLinus Torvalds } 13741da177e4SLinus Torvalds if (fdata->intensity & 0x01) { /* write record zero */ 13751da177e4SLinus Torvalds ect = (struct eckd_count *) data; 13761da177e4SLinus Torvalds data += sizeof(struct eckd_count); 13771da177e4SLinus Torvalds ect->cyl = cyl; 13781da177e4SLinus Torvalds ect->head = head; 13791da177e4SLinus Torvalds ect->record = 0; 13801da177e4SLinus Torvalds ect->kl = 0; 13811da177e4SLinus Torvalds ect->dl = 8; 13821da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 13831da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 13841da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 13851da177e4SLinus Torvalds ccw->count = 8; 13861da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 13871da177e4SLinus Torvalds ccw++; 13881da177e4SLinus Torvalds } 13891da177e4SLinus Torvalds if ((fdata->intensity & ~0x08) & 0x04) { /* erase track */ 13901da177e4SLinus Torvalds ect = (struct eckd_count *) data; 13911da177e4SLinus Torvalds data += sizeof(struct eckd_count); 13921da177e4SLinus Torvalds ect->cyl = cyl; 13931da177e4SLinus Torvalds ect->head = head; 13941da177e4SLinus Torvalds ect->record = 1; 13951da177e4SLinus Torvalds ect->kl = 0; 13961da177e4SLinus Torvalds ect->dl = 0; 13971da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 13981da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 13991da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 14001da177e4SLinus Torvalds ccw->count = 8; 14011da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 14021da177e4SLinus Torvalds } else { /* write remaining records */ 14031da177e4SLinus Torvalds for (i = 0; i < rpt; i++) { 14041da177e4SLinus Torvalds ect = (struct eckd_count *) data; 14051da177e4SLinus Torvalds data += sizeof(struct eckd_count); 14061da177e4SLinus Torvalds ect->cyl = cyl; 14071da177e4SLinus Torvalds ect->head = head; 14081da177e4SLinus Torvalds ect->record = i + 1; 14091da177e4SLinus Torvalds ect->kl = 0; 14101da177e4SLinus Torvalds ect->dl = fdata->blksize; 14111da177e4SLinus Torvalds /* Check for special tracks 0-1 when formatting CDL */ 14121da177e4SLinus Torvalds if ((fdata->intensity & 0x08) && 14131da177e4SLinus Torvalds fdata->start_unit == 0) { 14141da177e4SLinus Torvalds if (i < 3) { 14151da177e4SLinus Torvalds ect->kl = 4; 14161da177e4SLinus Torvalds ect->dl = sizes_trk0[i] - 4; 14171da177e4SLinus Torvalds } 14181da177e4SLinus Torvalds } 14191da177e4SLinus Torvalds if ((fdata->intensity & 0x08) && 14201da177e4SLinus Torvalds fdata->start_unit == 1) { 14211da177e4SLinus Torvalds ect->kl = 44; 14221da177e4SLinus Torvalds ect->dl = LABEL_SIZE - 44; 14231da177e4SLinus Torvalds } 14241da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 14251da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 14261da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 14271da177e4SLinus Torvalds ccw->count = 8; 14281da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 14291da177e4SLinus Torvalds ccw++; 14301da177e4SLinus Torvalds } 14311da177e4SLinus Torvalds } 14328e09f215SStefan Weinhuber fcp->startdev = device; 14338e09f215SStefan Weinhuber fcp->memdev = device; 14348e09f215SStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &fcp->flags); 14358e09f215SStefan Weinhuber fcp->retries = 5; /* set retry counter to enable default ERP */ 14361da177e4SLinus Torvalds fcp->buildclk = get_clock(); 14371da177e4SLinus Torvalds fcp->status = DASD_CQR_FILLED; 14381da177e4SLinus Torvalds return fcp; 14391da177e4SLinus Torvalds } 14401da177e4SLinus Torvalds 14418e09f215SStefan Weinhuber static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 14421da177e4SLinus Torvalds { 14438e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 14448e09f215SStefan Weinhuber if (cqr->block && (cqr->startdev != cqr->block->base)) { 14458e09f215SStefan Weinhuber dasd_eckd_reset_ccw_to_base_io(cqr); 14468e09f215SStefan Weinhuber cqr->startdev = cqr->block->base; 14471da177e4SLinus Torvalds } 14488e09f215SStefan Weinhuber }; 14491da177e4SLinus Torvalds 14501da177e4SLinus Torvalds static dasd_erp_fn_t 14511da177e4SLinus Torvalds dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 14521da177e4SLinus Torvalds { 14538e09f215SStefan Weinhuber struct dasd_device *device = (struct dasd_device *) cqr->startdev; 14541da177e4SLinus Torvalds struct ccw_device *cdev = device->cdev; 14551da177e4SLinus Torvalds 14561da177e4SLinus Torvalds switch (cdev->id.cu_type) { 14571da177e4SLinus Torvalds case 0x3990: 14581da177e4SLinus Torvalds case 0x2105: 14591da177e4SLinus Torvalds case 0x2107: 14601da177e4SLinus Torvalds case 0x1750: 14611da177e4SLinus Torvalds return dasd_3990_erp_action; 14621da177e4SLinus Torvalds case 0x9343: 14631da177e4SLinus Torvalds case 0x3880: 14641da177e4SLinus Torvalds default: 14651da177e4SLinus Torvalds return dasd_default_erp_action; 14661da177e4SLinus Torvalds } 14671da177e4SLinus Torvalds } 14681da177e4SLinus Torvalds 14691da177e4SLinus Torvalds static dasd_erp_fn_t 14701da177e4SLinus Torvalds dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 14711da177e4SLinus Torvalds { 14721da177e4SLinus Torvalds return dasd_default_erp_postaction; 14731da177e4SLinus Torvalds } 14741da177e4SLinus Torvalds 14758e09f215SStefan Weinhuber 14768e09f215SStefan Weinhuber static void dasd_eckd_handle_unsolicited_interrupt(struct dasd_device *device, 14778e09f215SStefan Weinhuber struct irb *irb) 14788e09f215SStefan Weinhuber { 14798e09f215SStefan Weinhuber char mask; 14808e09f215SStefan Weinhuber 14818e09f215SStefan Weinhuber /* first of all check for state change pending interrupt */ 14828e09f215SStefan Weinhuber mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 148323d805b6SPeter Oberparleiter if ((irb->scsw.cmd.dstat & mask) == mask) { 14848e09f215SStefan Weinhuber dasd_generic_handle_state_change(device); 14858e09f215SStefan Weinhuber return; 14868e09f215SStefan Weinhuber } 14878e09f215SStefan Weinhuber 14888e09f215SStefan Weinhuber /* summary unit check */ 148923d805b6SPeter Oberparleiter if ((irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) && 149023d805b6SPeter Oberparleiter (irb->ecw[7] == 0x0D)) { 14918e09f215SStefan Weinhuber dasd_alias_handle_summary_unit_check(device, irb); 14928e09f215SStefan Weinhuber return; 14938e09f215SStefan Weinhuber } 14948e09f215SStefan Weinhuber 1495f60c768cSStefan Haberland 1496f60c768cSStefan Haberland /* service information message SIM */ 14979d853cafSStefan Haberland if (irb->esw.esw0.erw.cons && (irb->ecw[27] & DASD_SENSE_BIT_0) && 14989d853cafSStefan Haberland ((irb->ecw[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 1499f60c768cSStefan Haberland dasd_3990_erp_handle_sim(device, irb->ecw); 15009d853cafSStefan Haberland dasd_schedule_device_bh(device); 1501f60c768cSStefan Haberland return; 1502f60c768cSStefan Haberland } 1503f60c768cSStefan Haberland 15048e09f215SStefan Weinhuber /* just report other unsolicited interrupts */ 15058e09f215SStefan Weinhuber DEV_MESSAGE(KERN_DEBUG, device, "%s", 15068e09f215SStefan Weinhuber "unsolicited interrupt received"); 15078e09f215SStefan Weinhuber device->discipline->dump_sense(device, NULL, irb); 15088e09f215SStefan Weinhuber dasd_schedule_device_bh(device); 15098e09f215SStefan Weinhuber 15108e09f215SStefan Weinhuber return; 15118e09f215SStefan Weinhuber }; 15128e09f215SStefan Weinhuber 15138e09f215SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 15148e09f215SStefan Weinhuber struct dasd_block *block, 15158e09f215SStefan Weinhuber struct request *req) 15161da177e4SLinus Torvalds { 15171da177e4SLinus Torvalds struct dasd_eckd_private *private; 15181da177e4SLinus Torvalds unsigned long *idaws; 15191da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 15201da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 15211da177e4SLinus Torvalds struct ccw1 *ccw; 15225705f702SNeilBrown struct req_iterator iter; 15231da177e4SLinus Torvalds struct bio_vec *bv; 15241da177e4SLinus Torvalds char *dst; 15251da177e4SLinus Torvalds unsigned int blksize, blk_per_trk, off; 15261da177e4SLinus Torvalds int count, cidaw, cplength, datasize; 15271da177e4SLinus Torvalds sector_t recid, first_rec, last_rec; 15281da177e4SLinus Torvalds sector_t first_trk, last_trk; 15291da177e4SLinus Torvalds unsigned int first_offs, last_offs; 15301da177e4SLinus Torvalds unsigned char cmd, rcmd; 15318e09f215SStefan Weinhuber int use_prefix; 15328e09f215SStefan Weinhuber struct dasd_device *basedev; 15331da177e4SLinus Torvalds 15348e09f215SStefan Weinhuber basedev = block->base; 15358e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 15361da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 15371da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_READ_MT; 15381da177e4SLinus Torvalds else if (rq_data_dir(req) == WRITE) 15391da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_WRITE_MT; 15401da177e4SLinus Torvalds else 15411da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 15421da177e4SLinus Torvalds /* Calculate number of blocks/records per track. */ 15438e09f215SStefan Weinhuber blksize = block->bp_block; 15441da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 15451da177e4SLinus Torvalds /* Calculate record id of first and last block. */ 15468e09f215SStefan Weinhuber first_rec = first_trk = req->sector >> block->s2b_shift; 15471da177e4SLinus Torvalds first_offs = sector_div(first_trk, blk_per_trk); 15481da177e4SLinus Torvalds last_rec = last_trk = 15498e09f215SStefan Weinhuber (req->sector + req->nr_sectors - 1) >> block->s2b_shift; 15501da177e4SLinus Torvalds last_offs = sector_div(last_trk, blk_per_trk); 15511da177e4SLinus Torvalds /* Check struct bio and count the number of blocks for the request. */ 15521da177e4SLinus Torvalds count = 0; 15531da177e4SLinus Torvalds cidaw = 0; 15545705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 15551da177e4SLinus Torvalds if (bv->bv_len & (blksize - 1)) 15561da177e4SLinus Torvalds /* Eckd can only do full blocks. */ 15571da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 15588e09f215SStefan Weinhuber count += bv->bv_len >> (block->s2b_shift + 9); 1559347a8dc3SMartin Schwidefsky #if defined(CONFIG_64BIT) 15606c92e699SJens Axboe if (idal_is_needed (page_address(bv->bv_page), bv->bv_len)) 15618e09f215SStefan Weinhuber cidaw += bv->bv_len >> (block->s2b_shift + 9); 15621da177e4SLinus Torvalds #endif 15631da177e4SLinus Torvalds } 15641da177e4SLinus Torvalds /* Paranoia. */ 15651da177e4SLinus Torvalds if (count != last_rec - first_rec + 1) 15661da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 15678e09f215SStefan Weinhuber 15688e09f215SStefan Weinhuber /* use the prefix command if available */ 15698e09f215SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 15708e09f215SStefan Weinhuber if (use_prefix) { 15718e09f215SStefan Weinhuber /* 1x prefix + number of blocks */ 15728e09f215SStefan Weinhuber cplength = 2 + count; 15738e09f215SStefan Weinhuber /* 1x prefix + cidaws*sizeof(long) */ 15748e09f215SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 15758e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 15768e09f215SStefan Weinhuber cidaw * sizeof(unsigned long); 15778e09f215SStefan Weinhuber } else { 15781da177e4SLinus Torvalds /* 1x define extent + 1x locate record + number of blocks */ 15791da177e4SLinus Torvalds cplength = 2 + count; 15801da177e4SLinus Torvalds /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 15818e09f215SStefan Weinhuber datasize = sizeof(struct DE_eckd_data) + 15828e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 15831da177e4SLinus Torvalds cidaw * sizeof(unsigned long); 15848e09f215SStefan Weinhuber } 15851da177e4SLinus Torvalds /* Find out the number of additional locate record ccws for cdl. */ 15861da177e4SLinus Torvalds if (private->uses_cdl && first_rec < 2*blk_per_trk) { 15871da177e4SLinus Torvalds if (last_rec >= 2*blk_per_trk) 15881da177e4SLinus Torvalds count = 2*blk_per_trk - first_rec; 15891da177e4SLinus Torvalds cplength += count; 15901da177e4SLinus Torvalds datasize += count*sizeof(struct LO_eckd_data); 15911da177e4SLinus Torvalds } 15921da177e4SLinus Torvalds /* Allocate the ccw request. */ 15931da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 15948e09f215SStefan Weinhuber cplength, datasize, startdev); 15951da177e4SLinus Torvalds if (IS_ERR(cqr)) 15961da177e4SLinus Torvalds return cqr; 15971da177e4SLinus Torvalds ccw = cqr->cpaddr; 15988e09f215SStefan Weinhuber /* First ccw is define extent or prefix. */ 15998e09f215SStefan Weinhuber if (use_prefix) { 16008e09f215SStefan Weinhuber if (prefix(ccw++, cqr->data, first_trk, 16018e09f215SStefan Weinhuber last_trk, cmd, basedev, startdev) == -EAGAIN) { 16028e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 16038e09f215SStefan Weinhuber * Try again later. 16048e09f215SStefan Weinhuber */ 16058e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 1606d54853efSMartin Schwidefsky return ERR_PTR(-EAGAIN); 1607d54853efSMartin Schwidefsky } 16088e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 16098e09f215SStefan Weinhuber sizeof(struct PFX_eckd_data)); 16108e09f215SStefan Weinhuber } else { 16118e09f215SStefan Weinhuber if (define_extent(ccw++, cqr->data, first_trk, 16128e09f215SStefan Weinhuber last_trk, cmd, startdev) == -EAGAIN) { 16138e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 16148e09f215SStefan Weinhuber * Try again later. 16158e09f215SStefan Weinhuber */ 16168e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 16178e09f215SStefan Weinhuber return ERR_PTR(-EAGAIN); 16188e09f215SStefan Weinhuber } 16198e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 16208e09f215SStefan Weinhuber sizeof(struct DE_eckd_data)); 16218e09f215SStefan Weinhuber } 16221da177e4SLinus Torvalds /* Build locate_record+read/write/ccws. */ 16231da177e4SLinus Torvalds LO_data = (struct LO_eckd_data *) (idaws + cidaw); 16241da177e4SLinus Torvalds recid = first_rec; 16251da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 16261da177e4SLinus Torvalds /* Only standard blocks so there is just one locate record. */ 16271da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 16281da177e4SLinus Torvalds locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 16298e09f215SStefan Weinhuber last_rec - recid + 1, cmd, basedev, blksize); 16301da177e4SLinus Torvalds } 16315705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 16321da177e4SLinus Torvalds dst = page_address(bv->bv_page) + bv->bv_offset; 16331da177e4SLinus Torvalds if (dasd_page_cache) { 16341da177e4SLinus Torvalds char *copy = kmem_cache_alloc(dasd_page_cache, 1635441e143eSChristoph Lameter GFP_DMA | __GFP_NOWARN); 16361da177e4SLinus Torvalds if (copy && rq_data_dir(req) == WRITE) 16371da177e4SLinus Torvalds memcpy(copy + bv->bv_offset, dst, bv->bv_len); 16381da177e4SLinus Torvalds if (copy) 16391da177e4SLinus Torvalds dst = copy + bv->bv_offset; 16401da177e4SLinus Torvalds } 16411da177e4SLinus Torvalds for (off = 0; off < bv->bv_len; off += blksize) { 16421da177e4SLinus Torvalds sector_t trkid = recid; 16431da177e4SLinus Torvalds unsigned int recoffs = sector_div(trkid, blk_per_trk); 16441da177e4SLinus Torvalds rcmd = cmd; 16451da177e4SLinus Torvalds count = blksize; 16461da177e4SLinus Torvalds /* Locate record for cdl special block ? */ 16471da177e4SLinus Torvalds if (private->uses_cdl && recid < 2*blk_per_trk) { 16481da177e4SLinus Torvalds if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 16491da177e4SLinus Torvalds rcmd |= 0x8; 16501da177e4SLinus Torvalds count = dasd_eckd_cdl_reclen(recid); 1651ec5883abSHorst Hummel if (count < blksize && 1652ec5883abSHorst Hummel rq_data_dir(req) == READ) 16531da177e4SLinus Torvalds memset(dst + count, 0xe5, 16541da177e4SLinus Torvalds blksize - count); 16551da177e4SLinus Torvalds } 16561da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 16571da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 16581da177e4SLinus Torvalds trkid, recoffs + 1, 16598e09f215SStefan Weinhuber 1, rcmd, basedev, count); 16601da177e4SLinus Torvalds } 16611da177e4SLinus Torvalds /* Locate record for standard blocks ? */ 16621da177e4SLinus Torvalds if (private->uses_cdl && recid == 2*blk_per_trk) { 16631da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 16641da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 16651da177e4SLinus Torvalds trkid, recoffs + 1, 16661da177e4SLinus Torvalds last_rec - recid + 1, 16678e09f215SStefan Weinhuber cmd, basedev, count); 16681da177e4SLinus Torvalds } 16691da177e4SLinus Torvalds /* Read/write ccw. */ 16701da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 16711da177e4SLinus Torvalds ccw->cmd_code = rcmd; 16721da177e4SLinus Torvalds ccw->count = count; 16731da177e4SLinus Torvalds if (idal_is_needed(dst, blksize)) { 16741da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) idaws; 16751da177e4SLinus Torvalds ccw->flags = CCW_FLAG_IDA; 16761da177e4SLinus Torvalds idaws = idal_create_words(idaws, dst, blksize); 16771da177e4SLinus Torvalds } else { 16781da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) dst; 16791da177e4SLinus Torvalds ccw->flags = 0; 16801da177e4SLinus Torvalds } 16811da177e4SLinus Torvalds ccw++; 16821da177e4SLinus Torvalds dst += blksize; 16831da177e4SLinus Torvalds recid++; 16841da177e4SLinus Torvalds } 16851da177e4SLinus Torvalds } 16864aff5e23SJens Axboe if (req->cmd_flags & REQ_FAILFAST) 16871c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 16888e09f215SStefan Weinhuber cqr->startdev = startdev; 16898e09f215SStefan Weinhuber cqr->memdev = startdev; 16908e09f215SStefan Weinhuber cqr->block = block; 16911da177e4SLinus Torvalds cqr->expires = 5 * 60 * HZ; /* 5 minutes */ 16921da177e4SLinus Torvalds cqr->lpm = private->path_data.ppm; 16931da177e4SLinus Torvalds cqr->retries = 256; 16941da177e4SLinus Torvalds cqr->buildclk = get_clock(); 16951da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 16961da177e4SLinus Torvalds return cqr; 16971da177e4SLinus Torvalds } 16981da177e4SLinus Torvalds 16991da177e4SLinus Torvalds static int 17001da177e4SLinus Torvalds dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 17011da177e4SLinus Torvalds { 17021da177e4SLinus Torvalds struct dasd_eckd_private *private; 17031da177e4SLinus Torvalds struct ccw1 *ccw; 17045705f702SNeilBrown struct req_iterator iter; 17051da177e4SLinus Torvalds struct bio_vec *bv; 17061da177e4SLinus Torvalds char *dst, *cda; 17071da177e4SLinus Torvalds unsigned int blksize, blk_per_trk, off; 17081da177e4SLinus Torvalds sector_t recid; 17095705f702SNeilBrown int status; 17101da177e4SLinus Torvalds 17111da177e4SLinus Torvalds if (!dasd_page_cache) 17121da177e4SLinus Torvalds goto out; 17138e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) cqr->block->base->private; 17148e09f215SStefan Weinhuber blksize = cqr->block->bp_block; 17151da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 17168e09f215SStefan Weinhuber recid = req->sector >> cqr->block->s2b_shift; 17171da177e4SLinus Torvalds ccw = cqr->cpaddr; 17181da177e4SLinus Torvalds /* Skip over define extent & locate record. */ 17191da177e4SLinus Torvalds ccw++; 17201da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 17211da177e4SLinus Torvalds ccw++; 17225705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 17231da177e4SLinus Torvalds dst = page_address(bv->bv_page) + bv->bv_offset; 17241da177e4SLinus Torvalds for (off = 0; off < bv->bv_len; off += blksize) { 17251da177e4SLinus Torvalds /* Skip locate record. */ 17261da177e4SLinus Torvalds if (private->uses_cdl && recid <= 2*blk_per_trk) 17271da177e4SLinus Torvalds ccw++; 17281da177e4SLinus Torvalds if (dst) { 17291da177e4SLinus Torvalds if (ccw->flags & CCW_FLAG_IDA) 17301da177e4SLinus Torvalds cda = *((char **)((addr_t) ccw->cda)); 17311da177e4SLinus Torvalds else 17321da177e4SLinus Torvalds cda = (char *)((addr_t) ccw->cda); 17331da177e4SLinus Torvalds if (dst != cda) { 17341da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 17351da177e4SLinus Torvalds memcpy(dst, cda, bv->bv_len); 17361da177e4SLinus Torvalds kmem_cache_free(dasd_page_cache, 17371da177e4SLinus Torvalds (void *)((addr_t)cda & PAGE_MASK)); 17381da177e4SLinus Torvalds } 17391da177e4SLinus Torvalds dst = NULL; 17401da177e4SLinus Torvalds } 17411da177e4SLinus Torvalds ccw++; 17421da177e4SLinus Torvalds recid++; 17431da177e4SLinus Torvalds } 17441da177e4SLinus Torvalds } 17451da177e4SLinus Torvalds out: 17461da177e4SLinus Torvalds status = cqr->status == DASD_CQR_DONE; 17478e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 17481da177e4SLinus Torvalds return status; 17491da177e4SLinus Torvalds } 17501da177e4SLinus Torvalds 17518e09f215SStefan Weinhuber /* 17528e09f215SStefan Weinhuber * Modify ccw chain in cqr so it can be started on a base device. 17538e09f215SStefan Weinhuber * 17548e09f215SStefan Weinhuber * Note that this is not enough to restart the cqr! 17558e09f215SStefan Weinhuber * Either reset cqr->startdev as well (summary unit check handling) 17568e09f215SStefan Weinhuber * or restart via separate cqr (as in ERP handling). 17578e09f215SStefan Weinhuber */ 17588e09f215SStefan Weinhuber void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 17598e09f215SStefan Weinhuber { 17608e09f215SStefan Weinhuber struct ccw1 *ccw; 17618e09f215SStefan Weinhuber struct PFX_eckd_data *pfxdata; 17628e09f215SStefan Weinhuber 17638e09f215SStefan Weinhuber ccw = cqr->cpaddr; 17648e09f215SStefan Weinhuber pfxdata = cqr->data; 17658e09f215SStefan Weinhuber 17668e09f215SStefan Weinhuber if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 17678e09f215SStefan Weinhuber pfxdata->validity.verify_base = 0; 17688e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 17698e09f215SStefan Weinhuber } 17708e09f215SStefan Weinhuber } 17718e09f215SStefan Weinhuber 17728e09f215SStefan Weinhuber #define DASD_ECKD_CHANQ_MAX_SIZE 4 17738e09f215SStefan Weinhuber 17748e09f215SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 17758e09f215SStefan Weinhuber struct dasd_block *block, 17768e09f215SStefan Weinhuber struct request *req) 17778e09f215SStefan Weinhuber { 17788e09f215SStefan Weinhuber struct dasd_eckd_private *private; 17798e09f215SStefan Weinhuber struct dasd_device *startdev; 17808e09f215SStefan Weinhuber unsigned long flags; 17818e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 17828e09f215SStefan Weinhuber 17838e09f215SStefan Weinhuber startdev = dasd_alias_get_start_dev(base); 17848e09f215SStefan Weinhuber if (!startdev) 17858e09f215SStefan Weinhuber startdev = base; 17868e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) startdev->private; 17878e09f215SStefan Weinhuber if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 17888e09f215SStefan Weinhuber return ERR_PTR(-EBUSY); 17898e09f215SStefan Weinhuber 17908e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 17918e09f215SStefan Weinhuber private->count++; 17928e09f215SStefan Weinhuber cqr = dasd_eckd_build_cp(startdev, block, req); 17938e09f215SStefan Weinhuber if (IS_ERR(cqr)) 17948e09f215SStefan Weinhuber private->count--; 17958e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 17968e09f215SStefan Weinhuber return cqr; 17978e09f215SStefan Weinhuber } 17988e09f215SStefan Weinhuber 17998e09f215SStefan Weinhuber static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 18008e09f215SStefan Weinhuber struct request *req) 18018e09f215SStefan Weinhuber { 18028e09f215SStefan Weinhuber struct dasd_eckd_private *private; 18038e09f215SStefan Weinhuber unsigned long flags; 18048e09f215SStefan Weinhuber 18058e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 18068e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) cqr->memdev->private; 18078e09f215SStefan Weinhuber private->count--; 18088e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 18098e09f215SStefan Weinhuber return dasd_eckd_free_cp(cqr, req); 18108e09f215SStefan Weinhuber } 18118e09f215SStefan Weinhuber 18121da177e4SLinus Torvalds static int 18131da177e4SLinus Torvalds dasd_eckd_fill_info(struct dasd_device * device, 18141da177e4SLinus Torvalds struct dasd_information2_t * info) 18151da177e4SLinus Torvalds { 18161da177e4SLinus Torvalds struct dasd_eckd_private *private; 18171da177e4SLinus Torvalds 18181da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 18191da177e4SLinus Torvalds info->label_block = 2; 18201da177e4SLinus Torvalds info->FBA_layout = private->uses_cdl ? 0 : 1; 18211da177e4SLinus Torvalds info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 18221da177e4SLinus Torvalds info->characteristics_size = sizeof(struct dasd_eckd_characteristics); 18231da177e4SLinus Torvalds memcpy(info->characteristics, &private->rdc_data, 18241da177e4SLinus Torvalds sizeof(struct dasd_eckd_characteristics)); 18254abb08c2SStefan Weinhuber info->confdata_size = min((unsigned long)private->conf_len, 18264abb08c2SStefan Weinhuber sizeof(info->configuration_data)); 18274abb08c2SStefan Weinhuber memcpy(info->configuration_data, private->conf_data, 18284abb08c2SStefan Weinhuber info->confdata_size); 18291da177e4SLinus Torvalds return 0; 18301da177e4SLinus Torvalds } 18311da177e4SLinus Torvalds 18321da177e4SLinus Torvalds /* 18331da177e4SLinus Torvalds * SECTION: ioctl functions for eckd devices. 18341da177e4SLinus Torvalds */ 18351da177e4SLinus Torvalds 18361da177e4SLinus Torvalds /* 18371da177e4SLinus Torvalds * Release device ioctl. 18381da177e4SLinus Torvalds * Buils a channel programm to releases a prior reserved 18391da177e4SLinus Torvalds * (see dasd_eckd_reserve) device. 18401da177e4SLinus Torvalds */ 18411da177e4SLinus Torvalds static int 18421107ccfbSChristoph Hellwig dasd_eckd_release(struct dasd_device *device) 18431da177e4SLinus Torvalds { 18441da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 18451da177e4SLinus Torvalds int rc; 18461da177e4SLinus Torvalds 18471da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 18481da177e4SLinus Torvalds return -EACCES; 18491da177e4SLinus Torvalds 18501da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 18511da177e4SLinus Torvalds 1, 32, device); 18521da177e4SLinus Torvalds if (IS_ERR(cqr)) { 18531da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 18541da177e4SLinus Torvalds "Could not allocate initialization request"); 18551da177e4SLinus Torvalds return PTR_ERR(cqr); 18561da177e4SLinus Torvalds } 18571da177e4SLinus Torvalds cqr->cpaddr->cmd_code = DASD_ECKD_CCW_RELEASE; 18581da177e4SLinus Torvalds cqr->cpaddr->flags |= CCW_FLAG_SLI; 18591da177e4SLinus Torvalds cqr->cpaddr->count = 32; 18601da177e4SLinus Torvalds cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; 18618e09f215SStefan Weinhuber cqr->startdev = device; 18628e09f215SStefan Weinhuber cqr->memdev = device; 18631da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 18641c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 1865336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 18661da177e4SLinus Torvalds cqr->expires = 2 * HZ; 18671da177e4SLinus Torvalds cqr->buildclk = get_clock(); 18681da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 18691da177e4SLinus Torvalds 18701da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 18711da177e4SLinus Torvalds 18728e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 18731da177e4SLinus Torvalds return rc; 18741da177e4SLinus Torvalds } 18751da177e4SLinus Torvalds 18761da177e4SLinus Torvalds /* 18771da177e4SLinus Torvalds * Reserve device ioctl. 18781da177e4SLinus Torvalds * Options are set to 'synchronous wait for interrupt' and 18791da177e4SLinus Torvalds * 'timeout the request'. This leads to a terminate IO if 18801da177e4SLinus Torvalds * the interrupt is outstanding for a certain time. 18811da177e4SLinus Torvalds */ 18821da177e4SLinus Torvalds static int 18831107ccfbSChristoph Hellwig dasd_eckd_reserve(struct dasd_device *device) 18841da177e4SLinus Torvalds { 18851da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 18861da177e4SLinus Torvalds int rc; 18871da177e4SLinus Torvalds 18881da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 18891da177e4SLinus Torvalds return -EACCES; 18901da177e4SLinus Torvalds 18911da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 18921da177e4SLinus Torvalds 1, 32, device); 18931da177e4SLinus Torvalds if (IS_ERR(cqr)) { 18941da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 18951da177e4SLinus Torvalds "Could not allocate initialization request"); 18961da177e4SLinus Torvalds return PTR_ERR(cqr); 18971da177e4SLinus Torvalds } 18981da177e4SLinus Torvalds cqr->cpaddr->cmd_code = DASD_ECKD_CCW_RESERVE; 18991da177e4SLinus Torvalds cqr->cpaddr->flags |= CCW_FLAG_SLI; 19001da177e4SLinus Torvalds cqr->cpaddr->count = 32; 19011da177e4SLinus Torvalds cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; 19028e09f215SStefan Weinhuber cqr->startdev = device; 19038e09f215SStefan Weinhuber cqr->memdev = device; 19041da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 19051c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 1906336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 19071da177e4SLinus Torvalds cqr->expires = 2 * HZ; 19081da177e4SLinus Torvalds cqr->buildclk = get_clock(); 19091da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 19101da177e4SLinus Torvalds 19111da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 19121da177e4SLinus Torvalds 19138e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 19141da177e4SLinus Torvalds return rc; 19151da177e4SLinus Torvalds } 19161da177e4SLinus Torvalds 19171da177e4SLinus Torvalds /* 19181da177e4SLinus Torvalds * Steal lock ioctl - unconditional reserve device. 19191da177e4SLinus Torvalds * Buils a channel programm to break a device's reservation. 19201da177e4SLinus Torvalds * (unconditional reserve) 19211da177e4SLinus Torvalds */ 19221da177e4SLinus Torvalds static int 19231107ccfbSChristoph Hellwig dasd_eckd_steal_lock(struct dasd_device *device) 19241da177e4SLinus Torvalds { 19251da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 19261da177e4SLinus Torvalds int rc; 19271da177e4SLinus Torvalds 19281da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 19291da177e4SLinus Torvalds return -EACCES; 19301da177e4SLinus Torvalds 19311da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 19321da177e4SLinus Torvalds 1, 32, device); 19331da177e4SLinus Torvalds if (IS_ERR(cqr)) { 19341da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 19351da177e4SLinus Torvalds "Could not allocate initialization request"); 19361da177e4SLinus Torvalds return PTR_ERR(cqr); 19371da177e4SLinus Torvalds } 19381da177e4SLinus Torvalds cqr->cpaddr->cmd_code = DASD_ECKD_CCW_SLCK; 19391da177e4SLinus Torvalds cqr->cpaddr->flags |= CCW_FLAG_SLI; 19401da177e4SLinus Torvalds cqr->cpaddr->count = 32; 19411da177e4SLinus Torvalds cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; 19428e09f215SStefan Weinhuber cqr->startdev = device; 19438e09f215SStefan Weinhuber cqr->memdev = device; 19441da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 19451c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 1946336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 19471da177e4SLinus Torvalds cqr->expires = 2 * HZ; 19481da177e4SLinus Torvalds cqr->buildclk = get_clock(); 19491da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 19501da177e4SLinus Torvalds 19511da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 19521da177e4SLinus Torvalds 19538e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 19541da177e4SLinus Torvalds return rc; 19551da177e4SLinus Torvalds } 19561da177e4SLinus Torvalds 19571da177e4SLinus Torvalds /* 19581da177e4SLinus Torvalds * Read performance statistics 19591da177e4SLinus Torvalds */ 19601da177e4SLinus Torvalds static int 19611107ccfbSChristoph Hellwig dasd_eckd_performance(struct dasd_device *device, void __user *argp) 19621da177e4SLinus Torvalds { 19631da177e4SLinus Torvalds struct dasd_psf_prssd_data *prssdp; 19641da177e4SLinus Torvalds struct dasd_rssd_perf_stats_t *stats; 19651da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 19661da177e4SLinus Torvalds struct ccw1 *ccw; 19671da177e4SLinus Torvalds int rc; 19681da177e4SLinus Torvalds 19691da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 19701da177e4SLinus Torvalds 1 /* PSF */ + 1 /* RSSD */ , 19711da177e4SLinus Torvalds (sizeof(struct dasd_psf_prssd_data) + 19721da177e4SLinus Torvalds sizeof(struct dasd_rssd_perf_stats_t)), 19731da177e4SLinus Torvalds device); 19741da177e4SLinus Torvalds if (IS_ERR(cqr)) { 19751da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 19761da177e4SLinus Torvalds "Could not allocate initialization request"); 19771da177e4SLinus Torvalds return PTR_ERR(cqr); 19781da177e4SLinus Torvalds } 19798e09f215SStefan Weinhuber cqr->startdev = device; 19808e09f215SStefan Weinhuber cqr->memdev = device; 19811da177e4SLinus Torvalds cqr->retries = 0; 19821da177e4SLinus Torvalds cqr->expires = 10 * HZ; 19831da177e4SLinus Torvalds 19841da177e4SLinus Torvalds /* Prepare for Read Subsystem Data */ 19851da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 19861da177e4SLinus Torvalds memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 19871da177e4SLinus Torvalds prssdp->order = PSF_ORDER_PRSSD; 19885d67d164SJoe Perches prssdp->suborder = 0x01; /* Performance Statistics */ 19891da177e4SLinus Torvalds prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 19901da177e4SLinus Torvalds 19911da177e4SLinus Torvalds ccw = cqr->cpaddr; 19921da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_PSF; 19931da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_psf_prssd_data); 19941da177e4SLinus Torvalds ccw->flags |= CCW_FLAG_CC; 19951da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) prssdp; 19961da177e4SLinus Torvalds 19971da177e4SLinus Torvalds /* Read Subsystem Data - Performance Statistics */ 19981da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 19991da177e4SLinus Torvalds memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 20001da177e4SLinus Torvalds 20011da177e4SLinus Torvalds ccw++; 20021da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_RSSD; 20031da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 20041da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) stats; 20051da177e4SLinus Torvalds 20061da177e4SLinus Torvalds cqr->buildclk = get_clock(); 20071da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 20081da177e4SLinus Torvalds rc = dasd_sleep_on(cqr); 20091da177e4SLinus Torvalds if (rc == 0) { 20101da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 20111da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 20121107ccfbSChristoph Hellwig if (copy_to_user(argp, stats, 20131107ccfbSChristoph Hellwig sizeof(struct dasd_rssd_perf_stats_t))) 20141107ccfbSChristoph Hellwig rc = -EFAULT; 20151da177e4SLinus Torvalds } 20168e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 20171da177e4SLinus Torvalds return rc; 20181da177e4SLinus Torvalds } 20191da177e4SLinus Torvalds 20201da177e4SLinus Torvalds /* 20211da177e4SLinus Torvalds * Get attributes (cache operations) 20221da177e4SLinus Torvalds * Returnes the cache attributes used in Define Extend (DE). 20231da177e4SLinus Torvalds */ 20241da177e4SLinus Torvalds static int 20251107ccfbSChristoph Hellwig dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 20261da177e4SLinus Torvalds { 20271107ccfbSChristoph Hellwig struct dasd_eckd_private *private = 20281107ccfbSChristoph Hellwig (struct dasd_eckd_private *)device->private; 20291107ccfbSChristoph Hellwig struct attrib_data_t attrib = private->attrib; 20301da177e4SLinus Torvalds int rc; 20311da177e4SLinus Torvalds 20321da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 20331da177e4SLinus Torvalds return -EACCES; 20341107ccfbSChristoph Hellwig if (!argp) 20351da177e4SLinus Torvalds return -EINVAL; 20361da177e4SLinus Torvalds 20371107ccfbSChristoph Hellwig rc = 0; 20381107ccfbSChristoph Hellwig if (copy_to_user(argp, (long *) &attrib, 20391107ccfbSChristoph Hellwig sizeof(struct attrib_data_t))) 20401107ccfbSChristoph Hellwig rc = -EFAULT; 20411da177e4SLinus Torvalds 20421da177e4SLinus Torvalds return rc; 20431da177e4SLinus Torvalds } 20441da177e4SLinus Torvalds 20451da177e4SLinus Torvalds /* 20461da177e4SLinus Torvalds * Set attributes (cache operations) 20471da177e4SLinus Torvalds * Stores the attributes for cache operation to be used in Define Extend (DE). 20481da177e4SLinus Torvalds */ 20491da177e4SLinus Torvalds static int 20501107ccfbSChristoph Hellwig dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 20511da177e4SLinus Torvalds { 20521107ccfbSChristoph Hellwig struct dasd_eckd_private *private = 20531107ccfbSChristoph Hellwig (struct dasd_eckd_private *)device->private; 20541da177e4SLinus Torvalds struct attrib_data_t attrib; 20551da177e4SLinus Torvalds 20561da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 20571da177e4SLinus Torvalds return -EACCES; 20581107ccfbSChristoph Hellwig if (!argp) 20591da177e4SLinus Torvalds return -EINVAL; 20601da177e4SLinus Torvalds 20611107ccfbSChristoph Hellwig if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 20621da177e4SLinus Torvalds return -EFAULT; 20631da177e4SLinus Torvalds private->attrib = attrib; 20641da177e4SLinus Torvalds 20651da177e4SLinus Torvalds DEV_MESSAGE(KERN_INFO, device, 20661da177e4SLinus Torvalds "cache operation mode set to %x (%i cylinder prestage)", 20671da177e4SLinus Torvalds private->attrib.operation, private->attrib.nr_cyl); 20681da177e4SLinus Torvalds return 0; 20691da177e4SLinus Torvalds } 20701da177e4SLinus Torvalds 20711107ccfbSChristoph Hellwig static int 20728e09f215SStefan Weinhuber dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 20731107ccfbSChristoph Hellwig { 20748e09f215SStefan Weinhuber struct dasd_device *device = block->base; 20758e09f215SStefan Weinhuber 20761107ccfbSChristoph Hellwig switch (cmd) { 20771107ccfbSChristoph Hellwig case BIODASDGATTR: 20781107ccfbSChristoph Hellwig return dasd_eckd_get_attrib(device, argp); 20791107ccfbSChristoph Hellwig case BIODASDSATTR: 20801107ccfbSChristoph Hellwig return dasd_eckd_set_attrib(device, argp); 20811107ccfbSChristoph Hellwig case BIODASDPSRD: 20821107ccfbSChristoph Hellwig return dasd_eckd_performance(device, argp); 20831107ccfbSChristoph Hellwig case BIODASDRLSE: 20841107ccfbSChristoph Hellwig return dasd_eckd_release(device); 20851107ccfbSChristoph Hellwig case BIODASDRSRV: 20861107ccfbSChristoph Hellwig return dasd_eckd_reserve(device); 20871107ccfbSChristoph Hellwig case BIODASDSLCK: 20881107ccfbSChristoph Hellwig return dasd_eckd_steal_lock(device); 20891107ccfbSChristoph Hellwig default: 20901107ccfbSChristoph Hellwig return -ENOIOCTLCMD; 20911107ccfbSChristoph Hellwig } 20921107ccfbSChristoph Hellwig } 20931107ccfbSChristoph Hellwig 20941da177e4SLinus Torvalds /* 2095445b5b49SHorst Hummel * Dump the range of CCWs into 'page' buffer 2096445b5b49SHorst Hummel * and return number of printed chars. 2097445b5b49SHorst Hummel */ 20984d284cacSHeiko Carstens static int 2099445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 2100445b5b49SHorst Hummel { 2101445b5b49SHorst Hummel int len, count; 2102445b5b49SHorst Hummel char *datap; 2103445b5b49SHorst Hummel 2104445b5b49SHorst Hummel len = 0; 2105445b5b49SHorst Hummel while (from <= to) { 2106445b5b49SHorst Hummel len += sprintf(page + len, KERN_ERR PRINTK_HEADER 2107445b5b49SHorst Hummel " CCW %p: %08X %08X DAT:", 2108445b5b49SHorst Hummel from, ((int *) from)[0], ((int *) from)[1]); 2109445b5b49SHorst Hummel 2110445b5b49SHorst Hummel /* get pointer to data (consider IDALs) */ 2111445b5b49SHorst Hummel if (from->flags & CCW_FLAG_IDA) 2112445b5b49SHorst Hummel datap = (char *) *((addr_t *) (addr_t) from->cda); 2113445b5b49SHorst Hummel else 2114445b5b49SHorst Hummel datap = (char *) ((addr_t) from->cda); 2115445b5b49SHorst Hummel 2116445b5b49SHorst Hummel /* dump data (max 32 bytes) */ 2117445b5b49SHorst Hummel for (count = 0; count < from->count && count < 32; count++) { 2118445b5b49SHorst Hummel if (count % 8 == 0) len += sprintf(page + len, " "); 2119445b5b49SHorst Hummel if (count % 4 == 0) len += sprintf(page + len, " "); 2120445b5b49SHorst Hummel len += sprintf(page + len, "%02x", datap[count]); 2121445b5b49SHorst Hummel } 2122445b5b49SHorst Hummel len += sprintf(page + len, "\n"); 2123445b5b49SHorst Hummel from++; 2124445b5b49SHorst Hummel } 2125445b5b49SHorst Hummel return len; 2126445b5b49SHorst Hummel } 2127445b5b49SHorst Hummel 2128445b5b49SHorst Hummel /* 21291da177e4SLinus Torvalds * Print sense data and related channel program. 21301da177e4SLinus Torvalds * Parts are printed because printk buffer is only 1024 bytes. 21311da177e4SLinus Torvalds */ 21328e09f215SStefan Weinhuber static void dasd_eckd_dump_sense(struct dasd_device *device, 21338e09f215SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 21341da177e4SLinus Torvalds { 21351da177e4SLinus Torvalds char *page; 2136445b5b49SHorst Hummel struct ccw1 *first, *last, *fail, *from, *to; 2137445b5b49SHorst Hummel int len, sl, sct; 21381da177e4SLinus Torvalds 21391da177e4SLinus Torvalds page = (char *) get_zeroed_page(GFP_ATOMIC); 21401da177e4SLinus Torvalds if (page == NULL) { 21411da177e4SLinus Torvalds DEV_MESSAGE(KERN_ERR, device, " %s", 21421da177e4SLinus Torvalds "No memory to dump sense data"); 21431da177e4SLinus Torvalds return; 21441da177e4SLinus Torvalds } 2145445b5b49SHorst Hummel /* dump the sense data */ 21461da177e4SLinus Torvalds len = sprintf(page, KERN_ERR PRINTK_HEADER 21471da177e4SLinus Torvalds " I/O status report for device %s:\n", 21482a0217d5SKay Sievers dev_name(&device->cdev->dev)); 21491da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 21501da177e4SLinus Torvalds " in req: %p CS: 0x%02X DS: 0x%02X\n", req, 215123d805b6SPeter Oberparleiter irb->scsw.cmd.cstat, irb->scsw.cmd.dstat); 21521da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 21531da177e4SLinus Torvalds " device %s: Failing CCW: %p\n", 21542a0217d5SKay Sievers dev_name(&device->cdev->dev), 215523d805b6SPeter Oberparleiter (void *) (addr_t) irb->scsw.cmd.cpa); 21561da177e4SLinus Torvalds if (irb->esw.esw0.erw.cons) { 21571da177e4SLinus Torvalds for (sl = 0; sl < 4; sl++) { 21581da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 21591da177e4SLinus Torvalds " Sense(hex) %2d-%2d:", 21601da177e4SLinus Torvalds (8 * sl), ((8 * sl) + 7)); 21611da177e4SLinus Torvalds 21621da177e4SLinus Torvalds for (sct = 0; sct < 8; sct++) { 21631da177e4SLinus Torvalds len += sprintf(page + len, " %02x", 21641da177e4SLinus Torvalds irb->ecw[8 * sl + sct]); 21651da177e4SLinus Torvalds } 21661da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 21671da177e4SLinus Torvalds } 21681da177e4SLinus Torvalds 21691da177e4SLinus Torvalds if (irb->ecw[27] & DASD_SENSE_BIT_0) { 21701da177e4SLinus Torvalds /* 24 Byte Sense Data */ 2171445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 21721da177e4SLinus Torvalds " 24 Byte: %x MSG %x, " 21731da177e4SLinus Torvalds "%s MSGb to SYSOP\n", 21741da177e4SLinus Torvalds irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 21751da177e4SLinus Torvalds irb->ecw[1] & 0x10 ? "" : "no"); 21761da177e4SLinus Torvalds } else { 21771da177e4SLinus Torvalds /* 32 Byte Sense Data */ 2178445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 21791da177e4SLinus Torvalds " 32 Byte: Format: %x " 21801da177e4SLinus Torvalds "Exception class %x\n", 21811da177e4SLinus Torvalds irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 21821da177e4SLinus Torvalds } 21831da177e4SLinus Torvalds } else { 2184445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 21851da177e4SLinus Torvalds " SORRY - NO VALID SENSE AVAILABLE\n"); 21861da177e4SLinus Torvalds } 2187445b5b49SHorst Hummel printk("%s", page); 21881da177e4SLinus Torvalds 21898e09f215SStefan Weinhuber if (req) { 21908e09f215SStefan Weinhuber /* req == NULL for unsolicited interrupts */ 2191445b5b49SHorst Hummel /* dump the Channel Program (max 140 Bytes per line) */ 2192445b5b49SHorst Hummel /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 2193445b5b49SHorst Hummel first = req->cpaddr; 2194445b5b49SHorst Hummel for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 2195445b5b49SHorst Hummel to = min(first + 6, last); 21961da177e4SLinus Torvalds len = sprintf(page, KERN_ERR PRINTK_HEADER 21971da177e4SLinus Torvalds " Related CP in req: %p\n", req); 2198445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(first, to, page + len); 2199445b5b49SHorst Hummel printk("%s", page); 22001da177e4SLinus Torvalds 2201445b5b49SHorst Hummel /* print failing CCW area (maximum 4) */ 2202445b5b49SHorst Hummel /* scsw->cda is either valid or zero */ 22031da177e4SLinus Torvalds len = 0; 2204445b5b49SHorst Hummel from = ++to; 220523d805b6SPeter Oberparleiter fail = (struct ccw1 *)(addr_t) 220623d805b6SPeter Oberparleiter irb->scsw.cmd.cpa; /* failing CCW */ 2207445b5b49SHorst Hummel if (from < fail - 2) { 2208445b5b49SHorst Hummel from = fail - 2; /* there is a gap - print header */ 2209445b5b49SHorst Hummel len += sprintf(page, KERN_ERR PRINTK_HEADER "......\n"); 22101da177e4SLinus Torvalds } 2211445b5b49SHorst Hummel to = min(fail + 1, last); 2212445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, to, page + len); 22131da177e4SLinus Torvalds 2214445b5b49SHorst Hummel /* print last CCWs (maximum 2) */ 2215445b5b49SHorst Hummel from = max(from, ++to); 2216445b5b49SHorst Hummel if (from < last - 1) { 2217445b5b49SHorst Hummel from = last - 1; /* there is a gap - print header */ 22181da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n"); 22191da177e4SLinus Torvalds } 2220445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, last, page + len); 22211da177e4SLinus Torvalds if (len > 0) 2222445b5b49SHorst Hummel printk("%s", page); 22238e09f215SStefan Weinhuber } 22241da177e4SLinus Torvalds free_page((unsigned long) page); 22251da177e4SLinus Torvalds } 22261da177e4SLinus Torvalds 22271da177e4SLinus Torvalds /* 22281da177e4SLinus Torvalds * max_blocks is dependent on the amount of storage that is available 22291da177e4SLinus Torvalds * in the static io buffer for each device. Currently each device has 22301da177e4SLinus Torvalds * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has 22311da177e4SLinus Torvalds * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use 22321da177e4SLinus Torvalds * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In 22331da177e4SLinus Torvalds * addition we have one define extent ccw + 16 bytes of data and one 22341da177e4SLinus Torvalds * locate record ccw + 16 bytes of data. That makes: 22351da177e4SLinus Torvalds * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. 22361da177e4SLinus Torvalds * We want to fit two into the available memory so that we can immediately 22371da177e4SLinus Torvalds * start the next request if one finishes off. That makes 249.5 blocks 22381da177e4SLinus Torvalds * for one request. Give a little safety and the result is 240. 22391da177e4SLinus Torvalds */ 22401da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline = { 22411da177e4SLinus Torvalds .owner = THIS_MODULE, 22421da177e4SLinus Torvalds .name = "ECKD", 22431da177e4SLinus Torvalds .ebcname = "ECKD", 22441da177e4SLinus Torvalds .max_blocks = 240, 22451da177e4SLinus Torvalds .check_device = dasd_eckd_check_characteristics, 22468e09f215SStefan Weinhuber .uncheck_device = dasd_eckd_uncheck_device, 22471da177e4SLinus Torvalds .do_analysis = dasd_eckd_do_analysis, 22488e09f215SStefan Weinhuber .ready_to_online = dasd_eckd_ready_to_online, 22498e09f215SStefan Weinhuber .online_to_ready = dasd_eckd_online_to_ready, 22501da177e4SLinus Torvalds .fill_geometry = dasd_eckd_fill_geometry, 22511da177e4SLinus Torvalds .start_IO = dasd_start_IO, 22521da177e4SLinus Torvalds .term_IO = dasd_term_IO, 22538e09f215SStefan Weinhuber .handle_terminated_request = dasd_eckd_handle_terminated_request, 22541da177e4SLinus Torvalds .format_device = dasd_eckd_format_device, 22551da177e4SLinus Torvalds .erp_action = dasd_eckd_erp_action, 22561da177e4SLinus Torvalds .erp_postaction = dasd_eckd_erp_postaction, 22578e09f215SStefan Weinhuber .handle_unsolicited_interrupt = dasd_eckd_handle_unsolicited_interrupt, 22588e09f215SStefan Weinhuber .build_cp = dasd_eckd_build_alias_cp, 22598e09f215SStefan Weinhuber .free_cp = dasd_eckd_free_alias_cp, 22601da177e4SLinus Torvalds .dump_sense = dasd_eckd_dump_sense, 22611da177e4SLinus Torvalds .fill_info = dasd_eckd_fill_info, 22621107ccfbSChristoph Hellwig .ioctl = dasd_eckd_ioctl, 22631da177e4SLinus Torvalds }; 22641da177e4SLinus Torvalds 22651da177e4SLinus Torvalds static int __init 22661da177e4SLinus Torvalds dasd_eckd_init(void) 22671da177e4SLinus Torvalds { 22681da177e4SLinus Torvalds ASCEBC(dasd_eckd_discipline.ebcname, 4); 226940545573SHorst Hummel return ccw_driver_register(&dasd_eckd_driver); 22701da177e4SLinus Torvalds } 22711da177e4SLinus Torvalds 22721da177e4SLinus Torvalds static void __exit 22731da177e4SLinus Torvalds dasd_eckd_cleanup(void) 22741da177e4SLinus Torvalds { 22751da177e4SLinus Torvalds ccw_driver_unregister(&dasd_eckd_driver); 22761da177e4SLinus Torvalds } 22771da177e4SLinus Torvalds 22781da177e4SLinus Torvalds module_init(dasd_eckd_init); 22791da177e4SLinus Torvalds module_exit(dasd_eckd_cleanup); 2280