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 9ab1d848fSNigel Hislop * EMC Symmetrix ioctl Copyright EMC Corporation, 2008 10ab1d848fSNigel Hislop * Author.........: Nigel Hislop <hislop_nigel@emc.com> 111da177e4SLinus Torvalds * 121da177e4SLinus Torvalds */ 131da177e4SLinus Torvalds 141da177e4SLinus Torvalds #include <linux/stddef.h> 151da177e4SLinus Torvalds #include <linux/kernel.h> 161da177e4SLinus Torvalds #include <linux/slab.h> 171da177e4SLinus Torvalds #include <linux/hdreg.h> /* HDIO_GETGEO */ 181da177e4SLinus Torvalds #include <linux/bio.h> 191da177e4SLinus Torvalds #include <linux/module.h> 201da177e4SLinus Torvalds #include <linux/init.h> 211da177e4SLinus Torvalds 221da177e4SLinus Torvalds #include <asm/debug.h> 231da177e4SLinus Torvalds #include <asm/idals.h> 241da177e4SLinus Torvalds #include <asm/ebcdic.h> 251da177e4SLinus Torvalds #include <asm/io.h> 261da177e4SLinus Torvalds #include <asm/todclk.h> 271da177e4SLinus Torvalds #include <asm/uaccess.h> 2840545573SHorst Hummel #include <asm/cio.h> 291da177e4SLinus Torvalds #include <asm/ccwdev.h> 301da177e4SLinus Torvalds 311da177e4SLinus Torvalds #include "dasd_int.h" 321da177e4SLinus Torvalds #include "dasd_eckd.h" 331da177e4SLinus Torvalds 341da177e4SLinus Torvalds #ifdef PRINTK_HEADER 351da177e4SLinus Torvalds #undef PRINTK_HEADER 361da177e4SLinus Torvalds #endif /* PRINTK_HEADER */ 371da177e4SLinus Torvalds #define PRINTK_HEADER "dasd(eckd):" 381da177e4SLinus Torvalds 391da177e4SLinus Torvalds #define ECKD_C0(i) (i->home_bytes) 401da177e4SLinus Torvalds #define ECKD_F(i) (i->formula) 411da177e4SLinus Torvalds #define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\ 421da177e4SLinus Torvalds (i->factors.f_0x02.f1)) 431da177e4SLinus Torvalds #define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\ 441da177e4SLinus Torvalds (i->factors.f_0x02.f2)) 451da177e4SLinus Torvalds #define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\ 461da177e4SLinus Torvalds (i->factors.f_0x02.f3)) 471da177e4SLinus Torvalds #define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0) 481da177e4SLinus Torvalds #define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0) 491da177e4SLinus Torvalds #define ECKD_F6(i) (i->factor6) 501da177e4SLinus Torvalds #define ECKD_F7(i) (i->factor7) 511da177e4SLinus Torvalds #define ECKD_F8(i) (i->factor8) 521da177e4SLinus Torvalds 531da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 541da177e4SLinus Torvalds 551da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline; 561da177e4SLinus Torvalds 571da177e4SLinus Torvalds /* The ccw bus type uses this table to find devices that it sends to 581da177e4SLinus Torvalds * dasd_eckd_probe */ 591da177e4SLinus Torvalds static struct ccw_device_id dasd_eckd_ids[] = { 60d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1}, 61d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2}, 62d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3390, 0), .driver_info = 0x3}, 63d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4}, 64d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5}, 65d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6}, 66d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7}, 67d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8}, 68d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9}, 69d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa}, 701da177e4SLinus Torvalds { /* end of list */ }, 711da177e4SLinus Torvalds }; 721da177e4SLinus Torvalds 731da177e4SLinus Torvalds MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids); 741da177e4SLinus Torvalds 751da177e4SLinus Torvalds static struct ccw_driver dasd_eckd_driver; /* see below */ 761da177e4SLinus Torvalds 771da177e4SLinus Torvalds /* initial attempt at a probe function. this can be simplified once 781da177e4SLinus Torvalds * the other detection code is gone */ 791da177e4SLinus Torvalds static int 801da177e4SLinus Torvalds dasd_eckd_probe (struct ccw_device *cdev) 811da177e4SLinus Torvalds { 821da177e4SLinus Torvalds int ret; 831da177e4SLinus Torvalds 8440545573SHorst Hummel /* set ECKD specific ccw-device options */ 8540545573SHorst Hummel ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE); 8640545573SHorst Hummel if (ret) { 8740545573SHorst Hummel printk(KERN_WARNING 8840545573SHorst Hummel "dasd_eckd_probe: could not set ccw-device options " 892a0217d5SKay Sievers "for %s\n", dev_name(&cdev->dev)); 901da177e4SLinus Torvalds return ret; 9140545573SHorst Hummel } 9240545573SHorst Hummel ret = dasd_generic_probe(cdev, &dasd_eckd_discipline); 9340545573SHorst Hummel return ret; 941da177e4SLinus Torvalds } 951da177e4SLinus Torvalds 961da177e4SLinus Torvalds static int 971da177e4SLinus Torvalds dasd_eckd_set_online(struct ccw_device *cdev) 981da177e4SLinus Torvalds { 991da177e4SLinus Torvalds return dasd_generic_set_online(cdev, &dasd_eckd_discipline); 1001da177e4SLinus Torvalds } 1011da177e4SLinus Torvalds 1021da177e4SLinus Torvalds static struct ccw_driver dasd_eckd_driver = { 1031da177e4SLinus Torvalds .name = "dasd-eckd", 1041da177e4SLinus Torvalds .owner = THIS_MODULE, 1051da177e4SLinus Torvalds .ids = dasd_eckd_ids, 1061da177e4SLinus Torvalds .probe = dasd_eckd_probe, 1071da177e4SLinus Torvalds .remove = dasd_generic_remove, 1081da177e4SLinus Torvalds .set_offline = dasd_generic_set_offline, 1091da177e4SLinus Torvalds .set_online = dasd_eckd_set_online, 1101da177e4SLinus Torvalds .notify = dasd_generic_notify, 1111da177e4SLinus Torvalds }; 1121da177e4SLinus Torvalds 1131da177e4SLinus Torvalds static const int sizes_trk0[] = { 28, 148, 84 }; 1141da177e4SLinus Torvalds #define LABEL_SIZE 140 1151da177e4SLinus Torvalds 1161da177e4SLinus Torvalds static inline unsigned int 1171da177e4SLinus Torvalds round_up_multiple(unsigned int no, unsigned int mult) 1181da177e4SLinus Torvalds { 1191da177e4SLinus Torvalds int rem = no % mult; 1201da177e4SLinus Torvalds return (rem ? no - rem + mult : no); 1211da177e4SLinus Torvalds } 1221da177e4SLinus Torvalds 1231da177e4SLinus Torvalds static inline unsigned int 1241da177e4SLinus Torvalds ceil_quot(unsigned int d1, unsigned int d2) 1251da177e4SLinus Torvalds { 1261da177e4SLinus Torvalds return (d1 + (d2 - 1)) / d2; 1271da177e4SLinus Torvalds } 1281da177e4SLinus Torvalds 1294d284cacSHeiko Carstens static unsigned int 1301da177e4SLinus Torvalds recs_per_track(struct dasd_eckd_characteristics * rdc, 1311da177e4SLinus Torvalds unsigned int kl, unsigned int dl) 1321da177e4SLinus Torvalds { 1331da177e4SLinus Torvalds int dn, kn; 1341da177e4SLinus Torvalds 1351da177e4SLinus Torvalds switch (rdc->dev_type) { 1361da177e4SLinus Torvalds case 0x3380: 1371da177e4SLinus Torvalds if (kl) 1381da177e4SLinus Torvalds return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + 1391da177e4SLinus Torvalds ceil_quot(dl + 12, 32)); 1401da177e4SLinus Torvalds else 1411da177e4SLinus Torvalds return 1499 / (15 + ceil_quot(dl + 12, 32)); 1421da177e4SLinus Torvalds case 0x3390: 1431da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1441da177e4SLinus Torvalds if (kl) { 1451da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1461da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + 1471da177e4SLinus Torvalds 9 + ceil_quot(dl + 6 * dn, 34)); 1481da177e4SLinus Torvalds } else 1491da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); 1501da177e4SLinus Torvalds case 0x9345: 1511da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1521da177e4SLinus Torvalds if (kl) { 1531da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1541da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + 1551da177e4SLinus Torvalds ceil_quot(dl + 6 * dn, 34)); 1561da177e4SLinus Torvalds } else 1571da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); 1581da177e4SLinus Torvalds } 1591da177e4SLinus Torvalds return 0; 1601da177e4SLinus Torvalds } 1611da177e4SLinus Torvalds 1624d284cacSHeiko Carstens static int 1631da177e4SLinus Torvalds check_XRC (struct ccw1 *de_ccw, 1641da177e4SLinus Torvalds struct DE_eckd_data *data, 1651da177e4SLinus Torvalds struct dasd_device *device) 1661da177e4SLinus Torvalds { 1671da177e4SLinus Torvalds struct dasd_eckd_private *private; 168d54853efSMartin Schwidefsky int rc; 1691da177e4SLinus Torvalds 1701da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 171d54853efSMartin Schwidefsky if (!private->rdc_data.facilities.XRC_supported) 172d54853efSMartin Schwidefsky return 0; 1731da177e4SLinus Torvalds 1741da177e4SLinus Torvalds /* switch on System Time Stamp - needed for XRC Support */ 1751da177e4SLinus Torvalds data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ 1761da177e4SLinus Torvalds data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ 1771da177e4SLinus Torvalds 178d54853efSMartin Schwidefsky rc = get_sync_clock(&data->ep_sys_time); 179d54853efSMartin Schwidefsky /* Ignore return code if sync clock is switched off. */ 180d54853efSMartin Schwidefsky if (rc == -ENOSYS || rc == -EACCES) 181d54853efSMartin Schwidefsky rc = 0; 1821da177e4SLinus Torvalds 1831da177e4SLinus Torvalds de_ccw->count = sizeof(struct DE_eckd_data); 1841da177e4SLinus Torvalds de_ccw->flags |= CCW_FLAG_SLI; 185d54853efSMartin Schwidefsky return rc; 1861da177e4SLinus Torvalds } 1871da177e4SLinus Torvalds 1884d284cacSHeiko Carstens static int 1891da177e4SLinus Torvalds define_extent(struct ccw1 * ccw, struct DE_eckd_data * data, int trk, 1901da177e4SLinus Torvalds int totrk, int cmd, struct dasd_device * device) 1911da177e4SLinus Torvalds { 1921da177e4SLinus Torvalds struct dasd_eckd_private *private; 1931da177e4SLinus Torvalds struct ch_t geo, beg, end; 194d54853efSMartin Schwidefsky int rc = 0; 1951da177e4SLinus Torvalds 1961da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 1971da177e4SLinus Torvalds 1981da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; 1991da177e4SLinus Torvalds ccw->flags = 0; 2001da177e4SLinus Torvalds ccw->count = 16; 2011da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 2021da177e4SLinus Torvalds 2031da177e4SLinus Torvalds memset(data, 0, sizeof(struct DE_eckd_data)); 2041da177e4SLinus Torvalds switch (cmd) { 2051da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 2061da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 2071da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 2081da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 2091da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 2101da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 2111da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 2121da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 2131da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_COUNT: 2141da177e4SLinus Torvalds data->mask.perm = 0x1; 2151da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 2161da177e4SLinus Torvalds break; 2171da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 2181da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 2191da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 2201da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 2211da177e4SLinus Torvalds data->mask.perm = 0x02; 2221da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 223d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2241da177e4SLinus Torvalds break; 2251da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 2261da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 2271da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 228d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2291da177e4SLinus Torvalds break; 2301da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 2311da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 2321da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 2331da177e4SLinus Torvalds data->mask.perm = 0x3; 2341da177e4SLinus Torvalds data->mask.auth = 0x1; 2351da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 236d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2371da177e4SLinus Torvalds break; 2381da177e4SLinus Torvalds default: 2391da177e4SLinus Torvalds DEV_MESSAGE(KERN_ERR, device, "unknown opcode 0x%x", cmd); 2401da177e4SLinus Torvalds break; 2411da177e4SLinus Torvalds } 2421da177e4SLinus Torvalds 2431da177e4SLinus Torvalds data->attributes.mode = 0x3; /* ECKD */ 2441da177e4SLinus Torvalds 2451da177e4SLinus Torvalds if ((private->rdc_data.cu_type == 0x2105 || 2461da177e4SLinus Torvalds private->rdc_data.cu_type == 0x2107 || 2471da177e4SLinus Torvalds private->rdc_data.cu_type == 0x1750) 2481da177e4SLinus Torvalds && !(private->uses_cdl && trk < 2)) 2491da177e4SLinus Torvalds data->ga_extended |= 0x40; /* Regular Data Format Mode */ 2501da177e4SLinus Torvalds 2511da177e4SLinus Torvalds geo.cyl = private->rdc_data.no_cyl; 2521da177e4SLinus Torvalds geo.head = private->rdc_data.trk_per_cyl; 2531da177e4SLinus Torvalds beg.cyl = trk / geo.head; 2541da177e4SLinus Torvalds beg.head = trk % geo.head; 2551da177e4SLinus Torvalds end.cyl = totrk / geo.head; 2561da177e4SLinus Torvalds end.head = totrk % geo.head; 2571da177e4SLinus Torvalds 2581da177e4SLinus Torvalds /* check for sequential prestage - enhance cylinder range */ 2591da177e4SLinus Torvalds if (data->attributes.operation == DASD_SEQ_PRESTAGE || 2601da177e4SLinus Torvalds data->attributes.operation == DASD_SEQ_ACCESS) { 2611da177e4SLinus Torvalds 2621da177e4SLinus Torvalds if (end.cyl + private->attrib.nr_cyl < geo.cyl) 2631da177e4SLinus Torvalds end.cyl += private->attrib.nr_cyl; 2641da177e4SLinus Torvalds else 2651da177e4SLinus Torvalds end.cyl = (geo.cyl - 1); 2661da177e4SLinus Torvalds } 2671da177e4SLinus Torvalds 2681da177e4SLinus Torvalds data->beg_ext.cyl = beg.cyl; 2691da177e4SLinus Torvalds data->beg_ext.head = beg.head; 2701da177e4SLinus Torvalds data->end_ext.cyl = end.cyl; 2711da177e4SLinus Torvalds data->end_ext.head = end.head; 272d54853efSMartin Schwidefsky return rc; 2731da177e4SLinus Torvalds } 2741da177e4SLinus Torvalds 2758e09f215SStefan Weinhuber static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata, 2768e09f215SStefan Weinhuber struct dasd_device *device) 2778e09f215SStefan Weinhuber { 2788e09f215SStefan Weinhuber struct dasd_eckd_private *private; 2798e09f215SStefan Weinhuber int rc; 2808e09f215SStefan Weinhuber 2818e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 2828e09f215SStefan Weinhuber if (!private->rdc_data.facilities.XRC_supported) 2838e09f215SStefan Weinhuber return 0; 2848e09f215SStefan Weinhuber 2858e09f215SStefan Weinhuber /* switch on System Time Stamp - needed for XRC Support */ 2868e09f215SStefan Weinhuber pfxdata->define_extend.ga_extended |= 0x08; /* 'Time Stamp Valid' */ 2878e09f215SStefan Weinhuber pfxdata->define_extend.ga_extended |= 0x02; /* 'Extended Parameter' */ 2888e09f215SStefan Weinhuber pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */ 2898e09f215SStefan Weinhuber 2908e09f215SStefan Weinhuber rc = get_sync_clock(&pfxdata->define_extend.ep_sys_time); 2918e09f215SStefan Weinhuber /* Ignore return code if sync clock is switched off. */ 2928e09f215SStefan Weinhuber if (rc == -ENOSYS || rc == -EACCES) 2938e09f215SStefan Weinhuber rc = 0; 2948e09f215SStefan Weinhuber return rc; 2958e09f215SStefan Weinhuber } 2968e09f215SStefan Weinhuber 2978e09f215SStefan Weinhuber static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, int trk, 2988e09f215SStefan Weinhuber int totrk, int cmd, struct dasd_device *basedev, 2998e09f215SStefan Weinhuber struct dasd_device *startdev) 3008e09f215SStefan Weinhuber { 3018e09f215SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 3028e09f215SStefan Weinhuber struct DE_eckd_data *data; 3038e09f215SStefan Weinhuber struct ch_t geo, beg, end; 3048e09f215SStefan Weinhuber int rc = 0; 3058e09f215SStefan Weinhuber 3068e09f215SStefan Weinhuber basepriv = (struct dasd_eckd_private *) basedev->private; 3078e09f215SStefan Weinhuber startpriv = (struct dasd_eckd_private *) startdev->private; 3088e09f215SStefan Weinhuber data = &pfxdata->define_extend; 3098e09f215SStefan Weinhuber 3108e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PFX; 3118e09f215SStefan Weinhuber ccw->flags = 0; 3128e09f215SStefan Weinhuber ccw->count = sizeof(*pfxdata); 3138e09f215SStefan Weinhuber ccw->cda = (__u32) __pa(pfxdata); 3148e09f215SStefan Weinhuber 3158e09f215SStefan Weinhuber memset(pfxdata, 0, sizeof(*pfxdata)); 3168e09f215SStefan Weinhuber /* prefix data */ 3178e09f215SStefan Weinhuber pfxdata->format = 0; 3184abb08c2SStefan Weinhuber pfxdata->base_address = basepriv->ned->unit_addr; 3194abb08c2SStefan Weinhuber pfxdata->base_lss = basepriv->ned->ID; 3208e09f215SStefan Weinhuber pfxdata->validity.define_extend = 1; 3218e09f215SStefan Weinhuber 3228e09f215SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 3238e09f215SStefan Weinhuber if (startpriv->uid.type != UA_BASE_DEVICE) { 3248e09f215SStefan Weinhuber pfxdata->validity.verify_base = 1; 3258e09f215SStefan Weinhuber if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 3268e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 1; 3278e09f215SStefan Weinhuber } 3288e09f215SStefan Weinhuber 3298e09f215SStefan Weinhuber /* define extend data (mostly)*/ 3308e09f215SStefan Weinhuber switch (cmd) { 3318e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_HOME_ADDRESS: 3328e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_RECORD_ZERO: 3338e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ: 3348e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_MT: 3358e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD: 3368e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD_MT: 3378e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_KD: 3388e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_KD_MT: 3398e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_COUNT: 3408e09f215SStefan Weinhuber data->mask.perm = 0x1; 3418e09f215SStefan Weinhuber data->attributes.operation = basepriv->attrib.operation; 3428e09f215SStefan Weinhuber break; 3438e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE: 3448e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_MT: 3458e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD: 3468e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD_MT: 3478e09f215SStefan Weinhuber data->mask.perm = 0x02; 3488e09f215SStefan Weinhuber data->attributes.operation = basepriv->attrib.operation; 3498e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 3508e09f215SStefan Weinhuber break; 3518e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD: 3528e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD_MT: 3538e09f215SStefan Weinhuber data->attributes.operation = DASD_BYPASS_CACHE; 3548e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 3558e09f215SStefan Weinhuber break; 3568e09f215SStefan Weinhuber case DASD_ECKD_CCW_ERASE: 3578e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 3588e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 3598e09f215SStefan Weinhuber data->mask.perm = 0x3; 3608e09f215SStefan Weinhuber data->mask.auth = 0x1; 3618e09f215SStefan Weinhuber data->attributes.operation = DASD_BYPASS_CACHE; 3628e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 3638e09f215SStefan Weinhuber break; 3648e09f215SStefan Weinhuber default: 3658e09f215SStefan Weinhuber DEV_MESSAGE(KERN_ERR, basedev, "unknown opcode 0x%x", cmd); 3668e09f215SStefan Weinhuber break; 3678e09f215SStefan Weinhuber } 3688e09f215SStefan Weinhuber 3698e09f215SStefan Weinhuber data->attributes.mode = 0x3; /* ECKD */ 3708e09f215SStefan Weinhuber 3718e09f215SStefan Weinhuber if ((basepriv->rdc_data.cu_type == 0x2105 || 3728e09f215SStefan Weinhuber basepriv->rdc_data.cu_type == 0x2107 || 3738e09f215SStefan Weinhuber basepriv->rdc_data.cu_type == 0x1750) 3748e09f215SStefan Weinhuber && !(basepriv->uses_cdl && trk < 2)) 3758e09f215SStefan Weinhuber data->ga_extended |= 0x40; /* Regular Data Format Mode */ 3768e09f215SStefan Weinhuber 3778e09f215SStefan Weinhuber geo.cyl = basepriv->rdc_data.no_cyl; 3788e09f215SStefan Weinhuber geo.head = basepriv->rdc_data.trk_per_cyl; 3798e09f215SStefan Weinhuber beg.cyl = trk / geo.head; 3808e09f215SStefan Weinhuber beg.head = trk % geo.head; 3818e09f215SStefan Weinhuber end.cyl = totrk / geo.head; 3828e09f215SStefan Weinhuber end.head = totrk % geo.head; 3838e09f215SStefan Weinhuber 3848e09f215SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 3858e09f215SStefan Weinhuber if (data->attributes.operation == DASD_SEQ_PRESTAGE || 3868e09f215SStefan Weinhuber data->attributes.operation == DASD_SEQ_ACCESS) { 3878e09f215SStefan Weinhuber 3888e09f215SStefan Weinhuber if (end.cyl + basepriv->attrib.nr_cyl < geo.cyl) 3898e09f215SStefan Weinhuber end.cyl += basepriv->attrib.nr_cyl; 3908e09f215SStefan Weinhuber else 3918e09f215SStefan Weinhuber end.cyl = (geo.cyl - 1); 3928e09f215SStefan Weinhuber } 3938e09f215SStefan Weinhuber 3948e09f215SStefan Weinhuber data->beg_ext.cyl = beg.cyl; 3958e09f215SStefan Weinhuber data->beg_ext.head = beg.head; 3968e09f215SStefan Weinhuber data->end_ext.cyl = end.cyl; 3978e09f215SStefan Weinhuber data->end_ext.head = end.head; 3988e09f215SStefan Weinhuber return rc; 3998e09f215SStefan Weinhuber } 4008e09f215SStefan Weinhuber 4014d284cacSHeiko Carstens static void 4021da177e4SLinus Torvalds locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, int trk, 4031da177e4SLinus Torvalds int rec_on_trk, int no_rec, int cmd, 4041da177e4SLinus Torvalds struct dasd_device * device, int reclen) 4051da177e4SLinus Torvalds { 4061da177e4SLinus Torvalds struct dasd_eckd_private *private; 4071da177e4SLinus Torvalds int sector; 4081da177e4SLinus Torvalds int dn, d; 4091da177e4SLinus Torvalds 4101da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 4111da177e4SLinus Torvalds 4121da177e4SLinus Torvalds DBF_DEV_EVENT(DBF_INFO, device, 4131da177e4SLinus Torvalds "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", 4141da177e4SLinus Torvalds trk, rec_on_trk, no_rec, cmd, reclen); 4151da177e4SLinus Torvalds 4161da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; 4171da177e4SLinus Torvalds ccw->flags = 0; 4181da177e4SLinus Torvalds ccw->count = 16; 4191da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 4201da177e4SLinus Torvalds 4211da177e4SLinus Torvalds memset(data, 0, sizeof(struct LO_eckd_data)); 4221da177e4SLinus Torvalds sector = 0; 4231da177e4SLinus Torvalds if (rec_on_trk) { 4241da177e4SLinus Torvalds switch (private->rdc_data.dev_type) { 4251da177e4SLinus Torvalds case 0x3390: 4261da177e4SLinus Torvalds dn = ceil_quot(reclen + 6, 232); 4271da177e4SLinus Torvalds d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 4281da177e4SLinus Torvalds sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 4291da177e4SLinus Torvalds break; 4301da177e4SLinus Torvalds case 0x3380: 4311da177e4SLinus Torvalds d = 7 + ceil_quot(reclen + 12, 32); 4321da177e4SLinus Torvalds sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 4331da177e4SLinus Torvalds break; 4341da177e4SLinus Torvalds } 4351da177e4SLinus Torvalds } 4361da177e4SLinus Torvalds data->sector = sector; 4371da177e4SLinus Torvalds data->count = no_rec; 4381da177e4SLinus Torvalds switch (cmd) { 4391da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 4401da177e4SLinus Torvalds data->operation.orientation = 0x3; 4411da177e4SLinus Torvalds data->operation.operation = 0x03; 4421da177e4SLinus Torvalds break; 4431da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 4441da177e4SLinus Torvalds data->operation.orientation = 0x3; 4451da177e4SLinus Torvalds data->operation.operation = 0x16; 4461da177e4SLinus Torvalds break; 4471da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 4481da177e4SLinus Torvalds data->operation.orientation = 0x1; 4491da177e4SLinus Torvalds data->operation.operation = 0x03; 4501da177e4SLinus Torvalds data->count++; 4511da177e4SLinus Torvalds break; 4521da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 4531da177e4SLinus Torvalds data->operation.orientation = 0x3; 4541da177e4SLinus Torvalds data->operation.operation = 0x16; 4551da177e4SLinus Torvalds data->count++; 4561da177e4SLinus Torvalds break; 4571da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 4581da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 4591da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 4601da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 4611da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 4621da177e4SLinus Torvalds data->length = reclen; 4631da177e4SLinus Torvalds data->operation.operation = 0x01; 4641da177e4SLinus Torvalds break; 4651da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 4661da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 4671da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 4681da177e4SLinus Torvalds data->length = reclen; 4691da177e4SLinus Torvalds data->operation.operation = 0x03; 4701da177e4SLinus Torvalds break; 4711da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 4721da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 4731da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 4741da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 4751da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 4761da177e4SLinus Torvalds data->length = reclen; 4771da177e4SLinus Torvalds data->operation.operation = 0x06; 4781da177e4SLinus Torvalds break; 4791da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 4801da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 4811da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 4821da177e4SLinus Torvalds data->length = reclen; 4831da177e4SLinus Torvalds data->operation.operation = 0x16; 4841da177e4SLinus Torvalds break; 4851da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_COUNT: 4861da177e4SLinus Torvalds data->operation.operation = 0x06; 4871da177e4SLinus Torvalds break; 4881da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 4891da177e4SLinus Torvalds data->length = reclen; 4901da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 4911da177e4SLinus Torvalds data->operation.operation = 0x0b; 4921da177e4SLinus Torvalds break; 4931da177e4SLinus Torvalds default: 4941da177e4SLinus Torvalds DEV_MESSAGE(KERN_ERR, device, "unknown opcode 0x%x", cmd); 4951da177e4SLinus Torvalds } 4961da177e4SLinus Torvalds data->seek_addr.cyl = data->search_arg.cyl = 4971da177e4SLinus Torvalds trk / private->rdc_data.trk_per_cyl; 4981da177e4SLinus Torvalds data->seek_addr.head = data->search_arg.head = 4991da177e4SLinus Torvalds trk % private->rdc_data.trk_per_cyl; 5001da177e4SLinus Torvalds data->search_arg.record = rec_on_trk; 5011da177e4SLinus Torvalds } 5021da177e4SLinus Torvalds 5031da177e4SLinus Torvalds /* 5041da177e4SLinus Torvalds * Returns 1 if the block is one of the special blocks that needs 5051da177e4SLinus Torvalds * to get read/written with the KD variant of the command. 5061da177e4SLinus Torvalds * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and 5071da177e4SLinus Torvalds * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. 5081da177e4SLinus Torvalds * Luckily the KD variants differ only by one bit (0x08) from the 5091da177e4SLinus Torvalds * normal variant. So don't wonder about code like: 5101da177e4SLinus Torvalds * if (dasd_eckd_cdl_special(blk_per_trk, recid)) 5111da177e4SLinus Torvalds * ccw->cmd_code |= 0x8; 5121da177e4SLinus Torvalds */ 5131da177e4SLinus Torvalds static inline int 5141da177e4SLinus Torvalds dasd_eckd_cdl_special(int blk_per_trk, int recid) 5151da177e4SLinus Torvalds { 5161da177e4SLinus Torvalds if (recid < 3) 5171da177e4SLinus Torvalds return 1; 5181da177e4SLinus Torvalds if (recid < blk_per_trk) 5191da177e4SLinus Torvalds return 0; 5201da177e4SLinus Torvalds if (recid < 2 * blk_per_trk) 5211da177e4SLinus Torvalds return 1; 5221da177e4SLinus Torvalds return 0; 5231da177e4SLinus Torvalds } 5241da177e4SLinus Torvalds 5251da177e4SLinus Torvalds /* 5261da177e4SLinus Torvalds * Returns the record size for the special blocks of the cdl format. 5271da177e4SLinus Torvalds * Only returns something useful if dasd_eckd_cdl_special is true 5281da177e4SLinus Torvalds * for the recid. 5291da177e4SLinus Torvalds */ 5301da177e4SLinus Torvalds static inline int 5311da177e4SLinus Torvalds dasd_eckd_cdl_reclen(int recid) 5321da177e4SLinus Torvalds { 5331da177e4SLinus Torvalds if (recid < 3) 5341da177e4SLinus Torvalds return sizes_trk0[recid]; 5351da177e4SLinus Torvalds return LABEL_SIZE; 5361da177e4SLinus Torvalds } 5371da177e4SLinus Torvalds 5383d052595SHorst Hummel /* 5393d052595SHorst Hummel * Generate device unique id that specifies the physical device. 5403d052595SHorst Hummel */ 5414abb08c2SStefan Weinhuber static int dasd_eckd_generate_uid(struct dasd_device *device, 5424abb08c2SStefan Weinhuber struct dasd_uid *uid) 5433d052595SHorst Hummel { 5443d052595SHorst Hummel struct dasd_eckd_private *private; 5454abb08c2SStefan Weinhuber int count; 5463d052595SHorst Hummel 5473d052595SHorst Hummel private = (struct dasd_eckd_private *) device->private; 5483d052595SHorst Hummel if (!private) 5493d052595SHorst Hummel return -ENODEV; 5504abb08c2SStefan Weinhuber if (!private->ned || !private->gneq) 5513d052595SHorst Hummel return -ENODEV; 5523d052595SHorst Hummel 5533d052595SHorst Hummel memset(uid, 0, sizeof(struct dasd_uid)); 5544abb08c2SStefan Weinhuber memcpy(uid->vendor, private->ned->HDA_manufacturer, 5553d052595SHorst Hummel sizeof(uid->vendor) - 1); 5563d052595SHorst Hummel EBCASC(uid->vendor, sizeof(uid->vendor) - 1); 5574abb08c2SStefan Weinhuber memcpy(uid->serial, private->ned->HDA_location, 5583d052595SHorst Hummel sizeof(uid->serial) - 1); 5593d052595SHorst Hummel EBCASC(uid->serial, sizeof(uid->serial) - 1); 5604abb08c2SStefan Weinhuber uid->ssid = private->gneq->subsystemID; 5614abb08c2SStefan Weinhuber uid->real_unit_addr = private->ned->unit_addr;; 5624abb08c2SStefan Weinhuber if (private->sneq) { 5634abb08c2SStefan Weinhuber uid->type = private->sneq->sua_flags; 5648e09f215SStefan Weinhuber if (uid->type == UA_BASE_PAV_ALIAS) 5654abb08c2SStefan Weinhuber uid->base_unit_addr = private->sneq->base_unit_addr; 5668e09f215SStefan Weinhuber } else { 5678e09f215SStefan Weinhuber uid->type = UA_BASE_DEVICE; 5688e09f215SStefan Weinhuber } 5694abb08c2SStefan Weinhuber if (private->vdsneq) { 5704abb08c2SStefan Weinhuber for (count = 0; count < 16; count++) { 5714abb08c2SStefan Weinhuber sprintf(uid->vduit+2*count, "%02x", 5724abb08c2SStefan Weinhuber private->vdsneq->uit[count]); 5734abb08c2SStefan Weinhuber } 5744abb08c2SStefan Weinhuber } 5753d052595SHorst Hummel return 0; 5763d052595SHorst Hummel } 5773d052595SHorst Hummel 578763968e2SHeiko Carstens static struct dasd_ccw_req *dasd_eckd_build_rcd_lpm(struct dasd_device *device, 57917283b56SCornelia Huck void *rcd_buffer, 58017283b56SCornelia Huck struct ciw *ciw, __u8 lpm) 58117283b56SCornelia Huck { 58217283b56SCornelia Huck struct dasd_ccw_req *cqr; 58317283b56SCornelia Huck struct ccw1 *ccw; 58417283b56SCornelia Huck 58517283b56SCornelia Huck cqr = dasd_smalloc_request("ECKD", 1 /* RCD */, ciw->count, device); 58617283b56SCornelia Huck 58717283b56SCornelia Huck if (IS_ERR(cqr)) { 58817283b56SCornelia Huck DEV_MESSAGE(KERN_WARNING, device, "%s", 58917283b56SCornelia Huck "Could not allocate RCD request"); 59017283b56SCornelia Huck return cqr; 59117283b56SCornelia Huck } 59217283b56SCornelia Huck 59317283b56SCornelia Huck ccw = cqr->cpaddr; 59417283b56SCornelia Huck ccw->cmd_code = ciw->cmd; 59517283b56SCornelia Huck ccw->cda = (__u32)(addr_t)rcd_buffer; 59617283b56SCornelia Huck ccw->count = ciw->count; 59717283b56SCornelia Huck 5988e09f215SStefan Weinhuber cqr->startdev = device; 5998e09f215SStefan Weinhuber cqr->memdev = device; 6008e09f215SStefan Weinhuber cqr->block = NULL; 60117283b56SCornelia Huck cqr->expires = 10*HZ; 60217283b56SCornelia Huck cqr->lpm = lpm; 60317283b56SCornelia Huck clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 60417283b56SCornelia Huck cqr->retries = 2; 60517283b56SCornelia Huck cqr->buildclk = get_clock(); 60617283b56SCornelia Huck cqr->status = DASD_CQR_FILLED; 60717283b56SCornelia Huck return cqr; 60817283b56SCornelia Huck } 60917283b56SCornelia Huck 61017283b56SCornelia Huck static int dasd_eckd_read_conf_lpm(struct dasd_device *device, 61117283b56SCornelia Huck void **rcd_buffer, 61217283b56SCornelia Huck int *rcd_buffer_size, __u8 lpm) 61317283b56SCornelia Huck { 61417283b56SCornelia Huck struct ciw *ciw; 61517283b56SCornelia Huck char *rcd_buf = NULL; 61617283b56SCornelia Huck int ret; 61717283b56SCornelia Huck struct dasd_ccw_req *cqr; 61817283b56SCornelia Huck 61917283b56SCornelia Huck /* 62017283b56SCornelia Huck * scan for RCD command in extended SenseID data 62117283b56SCornelia Huck */ 62217283b56SCornelia Huck ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 62317283b56SCornelia Huck if (!ciw || ciw->cmd == 0) { 62417283b56SCornelia Huck ret = -EOPNOTSUPP; 62517283b56SCornelia Huck goto out_error; 62617283b56SCornelia Huck } 62717283b56SCornelia Huck rcd_buf = kzalloc(ciw->count, GFP_KERNEL | GFP_DMA); 62817283b56SCornelia Huck if (!rcd_buf) { 62917283b56SCornelia Huck ret = -ENOMEM; 63017283b56SCornelia Huck goto out_error; 63117283b56SCornelia Huck } 6324abb08c2SStefan Weinhuber 6334abb08c2SStefan Weinhuber /* 6344abb08c2SStefan Weinhuber * buffer has to start with EBCDIC "V1.0" to show 6354abb08c2SStefan Weinhuber * support for virtual device SNEQ 6364abb08c2SStefan Weinhuber */ 6374abb08c2SStefan Weinhuber rcd_buf[0] = 0xE5; 6384abb08c2SStefan Weinhuber rcd_buf[1] = 0xF1; 6394abb08c2SStefan Weinhuber rcd_buf[2] = 0x4B; 6404abb08c2SStefan Weinhuber rcd_buf[3] = 0xF0; 64117283b56SCornelia Huck cqr = dasd_eckd_build_rcd_lpm(device, rcd_buf, ciw, lpm); 64217283b56SCornelia Huck if (IS_ERR(cqr)) { 64317283b56SCornelia Huck ret = PTR_ERR(cqr); 64417283b56SCornelia Huck goto out_error; 64517283b56SCornelia Huck } 64617283b56SCornelia Huck ret = dasd_sleep_on(cqr); 64717283b56SCornelia Huck /* 64817283b56SCornelia Huck * on success we update the user input parms 64917283b56SCornelia Huck */ 6508e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 65117283b56SCornelia Huck if (ret) 65217283b56SCornelia Huck goto out_error; 65317283b56SCornelia Huck 65417283b56SCornelia Huck *rcd_buffer_size = ciw->count; 65517283b56SCornelia Huck *rcd_buffer = rcd_buf; 65617283b56SCornelia Huck return 0; 65717283b56SCornelia Huck out_error: 65817283b56SCornelia Huck kfree(rcd_buf); 65917283b56SCornelia Huck *rcd_buffer = NULL; 66017283b56SCornelia Huck *rcd_buffer_size = 0; 66117283b56SCornelia Huck return ret; 66217283b56SCornelia Huck } 66317283b56SCornelia Huck 6644abb08c2SStefan Weinhuber static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private) 6654abb08c2SStefan Weinhuber { 6664abb08c2SStefan Weinhuber 6674abb08c2SStefan Weinhuber struct dasd_sneq *sneq; 6684abb08c2SStefan Weinhuber int i, count; 6694abb08c2SStefan Weinhuber 6704abb08c2SStefan Weinhuber private->ned = NULL; 6714abb08c2SStefan Weinhuber private->sneq = NULL; 6724abb08c2SStefan Weinhuber private->vdsneq = NULL; 6734abb08c2SStefan Weinhuber private->gneq = NULL; 6744abb08c2SStefan Weinhuber count = private->conf_len / sizeof(struct dasd_sneq); 6754abb08c2SStefan Weinhuber sneq = (struct dasd_sneq *)private->conf_data; 6764abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 6774abb08c2SStefan Weinhuber if (sneq->flags.identifier == 1 && sneq->format == 1) 6784abb08c2SStefan Weinhuber private->sneq = sneq; 6794abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 1 && sneq->format == 4) 6804abb08c2SStefan Weinhuber private->vdsneq = (struct vd_sneq *)sneq; 6814abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 2) 6824abb08c2SStefan Weinhuber private->gneq = (struct dasd_gneq *)sneq; 6834abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 3 && sneq->res1 == 1) 6844abb08c2SStefan Weinhuber private->ned = (struct dasd_ned *)sneq; 6854abb08c2SStefan Weinhuber sneq++; 6864abb08c2SStefan Weinhuber } 6874abb08c2SStefan Weinhuber if (!private->ned || !private->gneq) { 6884abb08c2SStefan Weinhuber private->ned = NULL; 6894abb08c2SStefan Weinhuber private->sneq = NULL; 6904abb08c2SStefan Weinhuber private->vdsneq = NULL; 6914abb08c2SStefan Weinhuber private->gneq = NULL; 6924abb08c2SStefan Weinhuber return -EINVAL; 6934abb08c2SStefan Weinhuber } 6944abb08c2SStefan Weinhuber return 0; 6954abb08c2SStefan Weinhuber 6964abb08c2SStefan Weinhuber }; 6974abb08c2SStefan Weinhuber 6984abb08c2SStefan Weinhuber static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len) 6994abb08c2SStefan Weinhuber { 7004abb08c2SStefan Weinhuber struct dasd_gneq *gneq; 7014abb08c2SStefan Weinhuber int i, count, found; 7024abb08c2SStefan Weinhuber 7034abb08c2SStefan Weinhuber count = conf_len / sizeof(*gneq); 7044abb08c2SStefan Weinhuber gneq = (struct dasd_gneq *)conf_data; 7054abb08c2SStefan Weinhuber found = 0; 7064abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 7074abb08c2SStefan Weinhuber if (gneq->flags.identifier == 2) { 7084abb08c2SStefan Weinhuber found = 1; 7094abb08c2SStefan Weinhuber break; 7104abb08c2SStefan Weinhuber } 7114abb08c2SStefan Weinhuber gneq++; 7124abb08c2SStefan Weinhuber } 7134abb08c2SStefan Weinhuber if (found) 7144abb08c2SStefan Weinhuber return ((char *)gneq)[18] & 0x07; 7154abb08c2SStefan Weinhuber else 7164abb08c2SStefan Weinhuber return 0; 7174abb08c2SStefan Weinhuber } 7184abb08c2SStefan Weinhuber 7194abb08c2SStefan Weinhuber static int dasd_eckd_read_conf(struct dasd_device *device) 7201da177e4SLinus Torvalds { 7211da177e4SLinus Torvalds void *conf_data; 7221da177e4SLinus Torvalds int conf_len, conf_data_saved; 7231da177e4SLinus Torvalds int rc; 7241da177e4SLinus Torvalds __u8 lpm; 7251da177e4SLinus Torvalds struct dasd_eckd_private *private; 7261da177e4SLinus Torvalds struct dasd_eckd_path *path_data; 7271da177e4SLinus Torvalds 7281da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 7291da177e4SLinus Torvalds path_data = (struct dasd_eckd_path *) &private->path_data; 7301da177e4SLinus Torvalds path_data->opm = ccw_device_get_path_mask(device->cdev); 7311da177e4SLinus Torvalds lpm = 0x80; 7321da177e4SLinus Torvalds conf_data_saved = 0; 7331da177e4SLinus Torvalds /* get configuration data per operational path */ 7341da177e4SLinus Torvalds for (lpm = 0x80; lpm; lpm>>= 1) { 7351da177e4SLinus Torvalds if (lpm & path_data->opm){ 73617283b56SCornelia Huck rc = dasd_eckd_read_conf_lpm(device, &conf_data, 7371da177e4SLinus Torvalds &conf_len, lpm); 7381da177e4SLinus Torvalds if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ 7391da177e4SLinus Torvalds MESSAGE(KERN_WARNING, 7401da177e4SLinus Torvalds "Read configuration data returned " 7411da177e4SLinus Torvalds "error %d", rc); 7421da177e4SLinus Torvalds return rc; 7431da177e4SLinus Torvalds } 7441da177e4SLinus Torvalds if (conf_data == NULL) { 7451da177e4SLinus Torvalds MESSAGE(KERN_WARNING, "%s", "No configuration " 7461da177e4SLinus Torvalds "data retrieved"); 747d133a960SGabriel Craciunescu continue; /* no error */ 7481da177e4SLinus Torvalds } 7491da177e4SLinus Torvalds /* save first valid configuration data */ 7501da177e4SLinus Torvalds if (!conf_data_saved) { 7514abb08c2SStefan Weinhuber kfree(private->conf_data); 7524abb08c2SStefan Weinhuber private->conf_data = conf_data; 7534abb08c2SStefan Weinhuber private->conf_len = conf_len; 7544abb08c2SStefan Weinhuber if (dasd_eckd_identify_conf_parts(private)) { 7554abb08c2SStefan Weinhuber private->conf_data = NULL; 7564abb08c2SStefan Weinhuber private->conf_len = 0; 7574abb08c2SStefan Weinhuber kfree(conf_data); 7584abb08c2SStefan Weinhuber continue; 7594abb08c2SStefan Weinhuber } 7601da177e4SLinus Torvalds conf_data_saved++; 7611da177e4SLinus Torvalds } 7624abb08c2SStefan Weinhuber switch (dasd_eckd_path_access(conf_data, conf_len)) { 7631da177e4SLinus Torvalds case 0x02: 7641da177e4SLinus Torvalds path_data->npm |= lpm; 7651da177e4SLinus Torvalds break; 7661da177e4SLinus Torvalds case 0x03: 7671da177e4SLinus Torvalds path_data->ppm |= lpm; 7681da177e4SLinus Torvalds break; 7691da177e4SLinus Torvalds } 7704abb08c2SStefan Weinhuber if (conf_data != private->conf_data) 7711da177e4SLinus Torvalds kfree(conf_data); 7721da177e4SLinus Torvalds } 7731da177e4SLinus Torvalds } 7741da177e4SLinus Torvalds return 0; 7751da177e4SLinus Torvalds } 7761da177e4SLinus Torvalds 7778e09f215SStefan Weinhuber static int dasd_eckd_read_features(struct dasd_device *device) 7788e09f215SStefan Weinhuber { 7798e09f215SStefan Weinhuber struct dasd_psf_prssd_data *prssdp; 7808e09f215SStefan Weinhuber struct dasd_rssd_features *features; 7818e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 7828e09f215SStefan Weinhuber struct ccw1 *ccw; 7838e09f215SStefan Weinhuber int rc; 7848e09f215SStefan Weinhuber struct dasd_eckd_private *private; 7858e09f215SStefan Weinhuber 7868e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 7878e09f215SStefan Weinhuber cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 7888e09f215SStefan Weinhuber 1 /* PSF */ + 1 /* RSSD */ , 7898e09f215SStefan Weinhuber (sizeof(struct dasd_psf_prssd_data) + 7908e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)), 7918e09f215SStefan Weinhuber device); 7928e09f215SStefan Weinhuber if (IS_ERR(cqr)) { 7938e09f215SStefan Weinhuber DEV_MESSAGE(KERN_WARNING, device, "%s", 7948e09f215SStefan Weinhuber "Could not allocate initialization request"); 7958e09f215SStefan Weinhuber return PTR_ERR(cqr); 7968e09f215SStefan Weinhuber } 7978e09f215SStefan Weinhuber cqr->startdev = device; 7988e09f215SStefan Weinhuber cqr->memdev = device; 7998e09f215SStefan Weinhuber cqr->block = NULL; 8008e09f215SStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 8018e09f215SStefan Weinhuber cqr->retries = 5; 8028e09f215SStefan Weinhuber cqr->expires = 10 * HZ; 8038e09f215SStefan Weinhuber 8048e09f215SStefan Weinhuber /* Prepare for Read Subsystem Data */ 8058e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 8068e09f215SStefan Weinhuber memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 8078e09f215SStefan Weinhuber prssdp->order = PSF_ORDER_PRSSD; 8088e09f215SStefan Weinhuber prssdp->suborder = 0x41; /* Read Feature Codes */ 8098e09f215SStefan Weinhuber /* all other bytes of prssdp must be zero */ 8108e09f215SStefan Weinhuber 8118e09f215SStefan Weinhuber ccw = cqr->cpaddr; 8128e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PSF; 8138e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_psf_prssd_data); 8148e09f215SStefan Weinhuber ccw->flags |= CCW_FLAG_CC; 8158e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) prssdp; 8168e09f215SStefan Weinhuber 8178e09f215SStefan Weinhuber /* Read Subsystem Data - feature codes */ 8188e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 8198e09f215SStefan Weinhuber memset(features, 0, sizeof(struct dasd_rssd_features)); 8208e09f215SStefan Weinhuber 8218e09f215SStefan Weinhuber ccw++; 8228e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RSSD; 8238e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_rssd_features); 8248e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) features; 8258e09f215SStefan Weinhuber 8268e09f215SStefan Weinhuber cqr->buildclk = get_clock(); 8278e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 8288e09f215SStefan Weinhuber rc = dasd_sleep_on(cqr); 8298e09f215SStefan Weinhuber if (rc == 0) { 8308e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 8318e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 8328e09f215SStefan Weinhuber memcpy(&private->features, features, 8338e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)); 8348e09f215SStefan Weinhuber } 8358e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 8368e09f215SStefan Weinhuber return rc; 8378e09f215SStefan Weinhuber } 8388e09f215SStefan Weinhuber 8398e09f215SStefan Weinhuber 8403d052595SHorst Hummel /* 84140545573SHorst Hummel * Build CP for Perform Subsystem Function - SSC. 84240545573SHorst Hummel */ 8438e09f215SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device) 84440545573SHorst Hummel { 84540545573SHorst Hummel struct dasd_ccw_req *cqr; 84640545573SHorst Hummel struct dasd_psf_ssc_data *psf_ssc_data; 84740545573SHorst Hummel struct ccw1 *ccw; 84840545573SHorst Hummel 84940545573SHorst Hummel cqr = dasd_smalloc_request("ECKD", 1 /* PSF */ , 85040545573SHorst Hummel sizeof(struct dasd_psf_ssc_data), 85140545573SHorst Hummel device); 85240545573SHorst Hummel 85340545573SHorst Hummel if (IS_ERR(cqr)) { 85440545573SHorst Hummel DEV_MESSAGE(KERN_WARNING, device, "%s", 85540545573SHorst Hummel "Could not allocate PSF-SSC request"); 85640545573SHorst Hummel return cqr; 85740545573SHorst Hummel } 85840545573SHorst Hummel psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 85940545573SHorst Hummel psf_ssc_data->order = PSF_ORDER_SSC; 8608e09f215SStefan Weinhuber psf_ssc_data->suborder = 0x88; 8618e09f215SStefan Weinhuber psf_ssc_data->reserved[0] = 0x88; 86240545573SHorst Hummel 86340545573SHorst Hummel ccw = cqr->cpaddr; 86440545573SHorst Hummel ccw->cmd_code = DASD_ECKD_CCW_PSF; 86540545573SHorst Hummel ccw->cda = (__u32)(addr_t)psf_ssc_data; 86640545573SHorst Hummel ccw->count = 66; 86740545573SHorst Hummel 8688e09f215SStefan Weinhuber cqr->startdev = device; 8698e09f215SStefan Weinhuber cqr->memdev = device; 8708e09f215SStefan Weinhuber cqr->block = NULL; 87140545573SHorst Hummel cqr->expires = 10*HZ; 87240545573SHorst Hummel cqr->buildclk = get_clock(); 87340545573SHorst Hummel cqr->status = DASD_CQR_FILLED; 87440545573SHorst Hummel return cqr; 87540545573SHorst Hummel } 87640545573SHorst Hummel 87740545573SHorst Hummel /* 87840545573SHorst Hummel * Perform Subsystem Function. 87940545573SHorst Hummel * It is necessary to trigger CIO for channel revalidation since this 88040545573SHorst Hummel * call might change behaviour of DASD devices. 88140545573SHorst Hummel */ 88240545573SHorst Hummel static int 88340545573SHorst Hummel dasd_eckd_psf_ssc(struct dasd_device *device) 88440545573SHorst Hummel { 88540545573SHorst Hummel struct dasd_ccw_req *cqr; 88640545573SHorst Hummel int rc; 88740545573SHorst Hummel 88840545573SHorst Hummel cqr = dasd_eckd_build_psf_ssc(device); 88940545573SHorst Hummel if (IS_ERR(cqr)) 89040545573SHorst Hummel return PTR_ERR(cqr); 89140545573SHorst Hummel 89240545573SHorst Hummel rc = dasd_sleep_on(cqr); 89340545573SHorst Hummel if (!rc) 89440545573SHorst Hummel /* trigger CIO to reprobe devices */ 89540545573SHorst Hummel css_schedule_reprobe(); 8968e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 89740545573SHorst Hummel return rc; 89840545573SHorst Hummel } 89940545573SHorst Hummel 90040545573SHorst Hummel /* 90140545573SHorst Hummel * Valide storage server of current device. 90240545573SHorst Hummel */ 9038e09f215SStefan Weinhuber static int dasd_eckd_validate_server(struct dasd_device *device) 90440545573SHorst Hummel { 90540545573SHorst Hummel int rc; 9068e09f215SStefan Weinhuber struct dasd_eckd_private *private; 90740545573SHorst Hummel 90840545573SHorst Hummel /* Currently PAV is the only reason to 'validate' server on LPAR */ 90940545573SHorst Hummel if (dasd_nopav || MACHINE_IS_VM) 91040545573SHorst Hummel return 0; 91140545573SHorst Hummel 91240545573SHorst Hummel rc = dasd_eckd_psf_ssc(device); 91340545573SHorst Hummel /* may be requested feature is not available on server, 91440545573SHorst Hummel * therefore just report error and go ahead */ 9158e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 91640545573SHorst Hummel DEV_MESSAGE(KERN_INFO, device, 9178e79a441SHorst Hummel "PSF-SSC on storage subsystem %s.%s.%04x returned rc=%d", 9188e09f215SStefan Weinhuber private->uid.vendor, private->uid.serial, 9198e09f215SStefan Weinhuber private->uid.ssid, rc); 92040545573SHorst Hummel /* RE-Read Configuration Data */ 92140545573SHorst Hummel return dasd_eckd_read_conf(device); 92240545573SHorst Hummel } 92340545573SHorst Hummel 92440545573SHorst Hummel /* 9253d052595SHorst Hummel * Check device characteristics. 9263d052595SHorst Hummel * If the device is accessible using ECKD discipline, the device is enabled. 9273d052595SHorst Hummel */ 9281da177e4SLinus Torvalds static int 9291da177e4SLinus Torvalds dasd_eckd_check_characteristics(struct dasd_device *device) 9301da177e4SLinus Torvalds { 9311da177e4SLinus Torvalds struct dasd_eckd_private *private; 9328e09f215SStefan Weinhuber struct dasd_block *block; 9331da177e4SLinus Torvalds void *rdc_data; 9348e09f215SStefan Weinhuber int is_known, rc; 9351da177e4SLinus Torvalds 9361da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 9371da177e4SLinus Torvalds if (private == NULL) { 938138c014dSHorst Hummel private = kzalloc(sizeof(struct dasd_eckd_private), 9391da177e4SLinus Torvalds GFP_KERNEL | GFP_DMA); 9401da177e4SLinus Torvalds if (private == NULL) { 9411da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 9421da177e4SLinus Torvalds "memory allocation failed for private " 9431da177e4SLinus Torvalds "data"); 9441da177e4SLinus Torvalds return -ENOMEM; 9451da177e4SLinus Torvalds } 9461da177e4SLinus Torvalds device->private = (void *) private; 9471da177e4SLinus Torvalds } 9481da177e4SLinus Torvalds /* Invalidate status of initial analysis. */ 9491da177e4SLinus Torvalds private->init_cqr_status = -1; 9501da177e4SLinus Torvalds /* Set default cache operations. */ 9511da177e4SLinus Torvalds private->attrib.operation = DASD_NORMAL_CACHE; 9521da177e4SLinus Torvalds private->attrib.nr_cyl = 0; 9531da177e4SLinus Torvalds 95440545573SHorst Hummel /* Read Configuration Data */ 95540545573SHorst Hummel rc = dasd_eckd_read_conf(device); 95640545573SHorst Hummel if (rc) 9578e09f215SStefan Weinhuber goto out_err1; 95840545573SHorst Hummel 95940545573SHorst Hummel /* Generate device unique id and register in devmap */ 9608e09f215SStefan Weinhuber rc = dasd_eckd_generate_uid(device, &private->uid); 96140545573SHorst Hummel if (rc) 9628e09f215SStefan Weinhuber goto out_err1; 9638e09f215SStefan Weinhuber dasd_set_uid(device->cdev, &private->uid); 9648e09f215SStefan Weinhuber 9658e09f215SStefan Weinhuber if (private->uid.type == UA_BASE_DEVICE) { 9668e09f215SStefan Weinhuber block = dasd_alloc_block(); 9678e09f215SStefan Weinhuber if (IS_ERR(block)) { 9688e09f215SStefan Weinhuber DEV_MESSAGE(KERN_WARNING, device, "%s", 9698e09f215SStefan Weinhuber "could not allocate dasd block structure"); 9708e09f215SStefan Weinhuber rc = PTR_ERR(block); 9718e09f215SStefan Weinhuber goto out_err1; 9728e09f215SStefan Weinhuber } 9738e09f215SStefan Weinhuber device->block = block; 9748e09f215SStefan Weinhuber block->base = device; 9758e09f215SStefan Weinhuber } 9768e09f215SStefan Weinhuber 9778e09f215SStefan Weinhuber /* register lcu with alias handling, enable PAV if this is a new lcu */ 9788e09f215SStefan Weinhuber is_known = dasd_alias_make_device_known_to_lcu(device); 9798e09f215SStefan Weinhuber if (is_known < 0) { 9808e09f215SStefan Weinhuber rc = is_known; 9818e09f215SStefan Weinhuber goto out_err2; 9828e09f215SStefan Weinhuber } 9838e09f215SStefan Weinhuber if (!is_known) { 9848e09f215SStefan Weinhuber /* new lcu found */ 9858e09f215SStefan Weinhuber rc = dasd_eckd_validate_server(device); /* will switch pav on */ 98640545573SHorst Hummel if (rc) 9878e09f215SStefan Weinhuber goto out_err3; 9888e09f215SStefan Weinhuber } 9898e09f215SStefan Weinhuber 9908e09f215SStefan Weinhuber /* Read Feature Codes */ 9918e09f215SStefan Weinhuber rc = dasd_eckd_read_features(device); 9928e09f215SStefan Weinhuber if (rc) 9938e09f215SStefan Weinhuber goto out_err3; 99440545573SHorst Hummel 9951da177e4SLinus Torvalds /* Read Device Characteristics */ 9961da177e4SLinus Torvalds rdc_data = (void *) &(private->rdc_data); 9973d052595SHorst Hummel memset(rdc_data, 0, sizeof(rdc_data)); 99817283b56SCornelia Huck rc = dasd_generic_read_dev_chars(device, "ECKD", &rdc_data, 64); 9998e09f215SStefan Weinhuber if (rc) { 10001da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, 100140545573SHorst Hummel "Read device characteristics returned " 100240545573SHorst Hummel "rc=%d", rc); 10038e09f215SStefan Weinhuber goto out_err3; 10048e09f215SStefan Weinhuber } 10051da177e4SLinus Torvalds DEV_MESSAGE(KERN_INFO, device, 10061da177e4SLinus Torvalds "%04X/%02X(CU:%04X/%02X) Cyl:%d Head:%d Sec:%d", 10071da177e4SLinus Torvalds private->rdc_data.dev_type, 10081da177e4SLinus Torvalds private->rdc_data.dev_model, 10091da177e4SLinus Torvalds private->rdc_data.cu_type, 10101da177e4SLinus Torvalds private->rdc_data.cu_model.model, 10111da177e4SLinus Torvalds private->rdc_data.no_cyl, 10121da177e4SLinus Torvalds private->rdc_data.trk_per_cyl, 10131da177e4SLinus Torvalds private->rdc_data.sec_per_trk); 10148e09f215SStefan Weinhuber return 0; 10158e09f215SStefan Weinhuber 10168e09f215SStefan Weinhuber out_err3: 10178e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 10188e09f215SStefan Weinhuber out_err2: 10198e09f215SStefan Weinhuber dasd_free_block(device->block); 10208e09f215SStefan Weinhuber device->block = NULL; 10218e09f215SStefan Weinhuber out_err1: 10224abb08c2SStefan Weinhuber kfree(private->conf_data); 10238e09f215SStefan Weinhuber kfree(device->private); 10248e09f215SStefan Weinhuber device->private = NULL; 10253d052595SHorst Hummel return rc; 10261da177e4SLinus Torvalds } 10271da177e4SLinus Torvalds 10288e09f215SStefan Weinhuber static void dasd_eckd_uncheck_device(struct dasd_device *device) 10298e09f215SStefan Weinhuber { 10304abb08c2SStefan Weinhuber struct dasd_eckd_private *private; 10314abb08c2SStefan Weinhuber 10324abb08c2SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 10338e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 10344abb08c2SStefan Weinhuber private->ned = NULL; 10354abb08c2SStefan Weinhuber private->sneq = NULL; 10364abb08c2SStefan Weinhuber private->vdsneq = NULL; 10374abb08c2SStefan Weinhuber private->gneq = NULL; 10384abb08c2SStefan Weinhuber private->conf_len = 0; 10394abb08c2SStefan Weinhuber kfree(private->conf_data); 10404abb08c2SStefan Weinhuber private->conf_data = NULL; 10418e09f215SStefan Weinhuber } 10428e09f215SStefan Weinhuber 10431da177e4SLinus Torvalds static struct dasd_ccw_req * 10441da177e4SLinus Torvalds dasd_eckd_analysis_ccw(struct dasd_device *device) 10451da177e4SLinus Torvalds { 10461da177e4SLinus Torvalds struct dasd_eckd_private *private; 10471da177e4SLinus Torvalds struct eckd_count *count_data; 10481da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 10491da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 10501da177e4SLinus Torvalds struct ccw1 *ccw; 10511da177e4SLinus Torvalds int cplength, datasize; 10521da177e4SLinus Torvalds int i; 10531da177e4SLinus Torvalds 10541da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 10551da177e4SLinus Torvalds 10561da177e4SLinus Torvalds cplength = 8; 10571da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 10581da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 10591da177e4SLinus Torvalds cplength, datasize, device); 10601da177e4SLinus Torvalds if (IS_ERR(cqr)) 10611da177e4SLinus Torvalds return cqr; 10621da177e4SLinus Torvalds ccw = cqr->cpaddr; 10631da177e4SLinus Torvalds /* Define extent for the first 3 tracks. */ 10641da177e4SLinus Torvalds define_extent(ccw++, cqr->data, 0, 2, 10651da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device); 10661da177e4SLinus Torvalds LO_data = cqr->data + sizeof(struct DE_eckd_data); 10671da177e4SLinus Torvalds /* Locate record for the first 4 records on track 0. */ 10681da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 10691da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 0, 0, 4, 10701da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 10711da177e4SLinus Torvalds 10721da177e4SLinus Torvalds count_data = private->count_area; 10731da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 10741da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 10751da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 10761da177e4SLinus Torvalds ccw->flags = 0; 10771da177e4SLinus Torvalds ccw->count = 8; 10781da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 10791da177e4SLinus Torvalds ccw++; 10801da177e4SLinus Torvalds count_data++; 10811da177e4SLinus Torvalds } 10821da177e4SLinus Torvalds 10831da177e4SLinus Torvalds /* Locate record for the first record on track 2. */ 10841da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 10851da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 2, 0, 1, 10861da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 10871da177e4SLinus Torvalds /* Read count ccw. */ 10881da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 10891da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 10901da177e4SLinus Torvalds ccw->flags = 0; 10911da177e4SLinus Torvalds ccw->count = 8; 10921da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 10931da177e4SLinus Torvalds 10948e09f215SStefan Weinhuber cqr->block = NULL; 10958e09f215SStefan Weinhuber cqr->startdev = device; 10968e09f215SStefan Weinhuber cqr->memdev = device; 10971da177e4SLinus Torvalds cqr->retries = 0; 10981da177e4SLinus Torvalds cqr->buildclk = get_clock(); 10991da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 11001da177e4SLinus Torvalds return cqr; 11011da177e4SLinus Torvalds } 11021da177e4SLinus Torvalds 11031da177e4SLinus Torvalds /* 11041da177e4SLinus Torvalds * This is the callback function for the init_analysis cqr. It saves 11051da177e4SLinus Torvalds * the status of the initial analysis ccw before it frees it and kicks 11061da177e4SLinus Torvalds * the device to continue the startup sequence. This will call 11071da177e4SLinus Torvalds * dasd_eckd_do_analysis again (if the devices has not been marked 11081da177e4SLinus Torvalds * for deletion in the meantime). 11091da177e4SLinus Torvalds */ 11101da177e4SLinus Torvalds static void 11111da177e4SLinus Torvalds dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, void *data) 11121da177e4SLinus Torvalds { 11131da177e4SLinus Torvalds struct dasd_eckd_private *private; 11141da177e4SLinus Torvalds struct dasd_device *device; 11151da177e4SLinus Torvalds 11168e09f215SStefan Weinhuber device = init_cqr->startdev; 11171da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 11181da177e4SLinus Torvalds private->init_cqr_status = init_cqr->status; 11191da177e4SLinus Torvalds dasd_sfree_request(init_cqr, device); 11201da177e4SLinus Torvalds dasd_kick_device(device); 11211da177e4SLinus Torvalds } 11221da177e4SLinus Torvalds 11231da177e4SLinus Torvalds static int 11248e09f215SStefan Weinhuber dasd_eckd_start_analysis(struct dasd_block *block) 11251da177e4SLinus Torvalds { 11261da177e4SLinus Torvalds struct dasd_eckd_private *private; 11271da177e4SLinus Torvalds struct dasd_ccw_req *init_cqr; 11281da177e4SLinus Torvalds 11298e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 11308e09f215SStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(block->base); 11311da177e4SLinus Torvalds if (IS_ERR(init_cqr)) 11321da177e4SLinus Torvalds return PTR_ERR(init_cqr); 11331da177e4SLinus Torvalds init_cqr->callback = dasd_eckd_analysis_callback; 11341da177e4SLinus Torvalds init_cqr->callback_data = NULL; 11351da177e4SLinus Torvalds init_cqr->expires = 5*HZ; 11361da177e4SLinus Torvalds dasd_add_request_head(init_cqr); 11371da177e4SLinus Torvalds return -EAGAIN; 11381da177e4SLinus Torvalds } 11391da177e4SLinus Torvalds 11401da177e4SLinus Torvalds static int 11418e09f215SStefan Weinhuber dasd_eckd_end_analysis(struct dasd_block *block) 11421da177e4SLinus Torvalds { 11438e09f215SStefan Weinhuber struct dasd_device *device; 11441da177e4SLinus Torvalds struct dasd_eckd_private *private; 11451da177e4SLinus Torvalds struct eckd_count *count_area; 11461da177e4SLinus Torvalds unsigned int sb, blk_per_trk; 11471da177e4SLinus Torvalds int status, i; 11481da177e4SLinus Torvalds 11498e09f215SStefan Weinhuber device = block->base; 11501da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 11511da177e4SLinus Torvalds status = private->init_cqr_status; 11521da177e4SLinus Torvalds private->init_cqr_status = -1; 11531da177e4SLinus Torvalds if (status != DASD_CQR_DONE) { 11541da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 11551da177e4SLinus Torvalds "volume analysis returned unformatted disk"); 11561da177e4SLinus Torvalds return -EMEDIUMTYPE; 11571da177e4SLinus Torvalds } 11581da177e4SLinus Torvalds 11591da177e4SLinus Torvalds private->uses_cdl = 1; 11601da177e4SLinus Torvalds /* Calculate number of blocks/records per track. */ 11618e09f215SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 11621da177e4SLinus Torvalds /* Check Track 0 for Compatible Disk Layout */ 11631da177e4SLinus Torvalds count_area = NULL; 11641da177e4SLinus Torvalds for (i = 0; i < 3; i++) { 11651da177e4SLinus Torvalds if (private->count_area[i].kl != 4 || 11661da177e4SLinus Torvalds private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4) { 11671da177e4SLinus Torvalds private->uses_cdl = 0; 11681da177e4SLinus Torvalds break; 11691da177e4SLinus Torvalds } 11701da177e4SLinus Torvalds } 11711da177e4SLinus Torvalds if (i == 3) 11721da177e4SLinus Torvalds count_area = &private->count_area[4]; 11731da177e4SLinus Torvalds 11741da177e4SLinus Torvalds if (private->uses_cdl == 0) { 11751da177e4SLinus Torvalds for (i = 0; i < 5; i++) { 11761da177e4SLinus Torvalds if ((private->count_area[i].kl != 0) || 11771da177e4SLinus Torvalds (private->count_area[i].dl != 11781da177e4SLinus Torvalds private->count_area[0].dl)) 11791da177e4SLinus Torvalds break; 11801da177e4SLinus Torvalds } 11811da177e4SLinus Torvalds if (i == 5) 11821da177e4SLinus Torvalds count_area = &private->count_area[0]; 11831da177e4SLinus Torvalds } else { 11841da177e4SLinus Torvalds if (private->count_area[3].record == 1) 11851da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 11861da177e4SLinus Torvalds "Trk 0: no records after VTOC!"); 11871da177e4SLinus Torvalds } 11881da177e4SLinus Torvalds if (count_area != NULL && count_area->kl == 0) { 11891da177e4SLinus Torvalds /* we found notthing violating our disk layout */ 11901da177e4SLinus Torvalds if (dasd_check_blocksize(count_area->dl) == 0) 11918e09f215SStefan Weinhuber block->bp_block = count_area->dl; 11921da177e4SLinus Torvalds } 11938e09f215SStefan Weinhuber if (block->bp_block == 0) { 11941da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 11951da177e4SLinus Torvalds "Volume has incompatible disk layout"); 11961da177e4SLinus Torvalds return -EMEDIUMTYPE; 11971da177e4SLinus Torvalds } 11988e09f215SStefan Weinhuber block->s2b_shift = 0; /* bits to shift 512 to get a block */ 11998e09f215SStefan Weinhuber for (sb = 512; sb < block->bp_block; sb = sb << 1) 12008e09f215SStefan Weinhuber block->s2b_shift++; 12011da177e4SLinus Torvalds 12028e09f215SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 12038e09f215SStefan Weinhuber block->blocks = (private->rdc_data.no_cyl * 12041da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 12051da177e4SLinus Torvalds blk_per_trk); 12061da177e4SLinus Torvalds 12071da177e4SLinus Torvalds DEV_MESSAGE(KERN_INFO, device, 12081da177e4SLinus Torvalds "(%dkB blks): %dkB at %dkB/trk %s", 12098e09f215SStefan Weinhuber (block->bp_block >> 10), 12101da177e4SLinus Torvalds ((private->rdc_data.no_cyl * 12111da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 12128e09f215SStefan Weinhuber blk_per_trk * (block->bp_block >> 9)) >> 1), 12138e09f215SStefan Weinhuber ((blk_per_trk * block->bp_block) >> 10), 12141da177e4SLinus Torvalds private->uses_cdl ? 12151da177e4SLinus Torvalds "compatible disk layout" : "linux disk layout"); 12161da177e4SLinus Torvalds 12171da177e4SLinus Torvalds return 0; 12181da177e4SLinus Torvalds } 12191da177e4SLinus Torvalds 12208e09f215SStefan Weinhuber static int dasd_eckd_do_analysis(struct dasd_block *block) 12211da177e4SLinus Torvalds { 12221da177e4SLinus Torvalds struct dasd_eckd_private *private; 12231da177e4SLinus Torvalds 12248e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 12251da177e4SLinus Torvalds if (private->init_cqr_status < 0) 12268e09f215SStefan Weinhuber return dasd_eckd_start_analysis(block); 12271da177e4SLinus Torvalds else 12288e09f215SStefan Weinhuber return dasd_eckd_end_analysis(block); 12291da177e4SLinus Torvalds } 12301da177e4SLinus Torvalds 12318e09f215SStefan Weinhuber static int dasd_eckd_ready_to_online(struct dasd_device *device) 12328e09f215SStefan Weinhuber { 12338e09f215SStefan Weinhuber return dasd_alias_add_device(device); 12348e09f215SStefan Weinhuber }; 12358e09f215SStefan Weinhuber 12368e09f215SStefan Weinhuber static int dasd_eckd_online_to_ready(struct dasd_device *device) 12378e09f215SStefan Weinhuber { 12388e09f215SStefan Weinhuber return dasd_alias_remove_device(device); 12398e09f215SStefan Weinhuber }; 12408e09f215SStefan Weinhuber 12411da177e4SLinus Torvalds static int 12428e09f215SStefan Weinhuber dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 12431da177e4SLinus Torvalds { 12441da177e4SLinus Torvalds struct dasd_eckd_private *private; 12451da177e4SLinus Torvalds 12468e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 12478e09f215SStefan Weinhuber if (dasd_check_blocksize(block->bp_block) == 0) { 12481da177e4SLinus Torvalds geo->sectors = recs_per_track(&private->rdc_data, 12498e09f215SStefan Weinhuber 0, block->bp_block); 12501da177e4SLinus Torvalds } 12511da177e4SLinus Torvalds geo->cylinders = private->rdc_data.no_cyl; 12521da177e4SLinus Torvalds geo->heads = private->rdc_data.trk_per_cyl; 12531da177e4SLinus Torvalds return 0; 12541da177e4SLinus Torvalds } 12551da177e4SLinus Torvalds 12561da177e4SLinus Torvalds static struct dasd_ccw_req * 12571da177e4SLinus Torvalds dasd_eckd_format_device(struct dasd_device * device, 12581da177e4SLinus Torvalds struct format_data_t * fdata) 12591da177e4SLinus Torvalds { 12601da177e4SLinus Torvalds struct dasd_eckd_private *private; 12611da177e4SLinus Torvalds struct dasd_ccw_req *fcp; 12621da177e4SLinus Torvalds struct eckd_count *ect; 12631da177e4SLinus Torvalds struct ccw1 *ccw; 12641da177e4SLinus Torvalds void *data; 12651da177e4SLinus Torvalds int rpt, cyl, head; 12661da177e4SLinus Torvalds int cplength, datasize; 12671da177e4SLinus Torvalds int i; 1268f9a28f7bSJean-Baptiste Joret int intensity = 0; 1269f9a28f7bSJean-Baptiste Joret int r0_perm; 12701da177e4SLinus Torvalds 12711da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 12721da177e4SLinus Torvalds rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize); 12731da177e4SLinus Torvalds cyl = fdata->start_unit / private->rdc_data.trk_per_cyl; 12741da177e4SLinus Torvalds head = fdata->start_unit % private->rdc_data.trk_per_cyl; 12751da177e4SLinus Torvalds 12761da177e4SLinus Torvalds /* Sanity checks. */ 12771da177e4SLinus Torvalds if (fdata->start_unit >= 12781da177e4SLinus Torvalds (private->rdc_data.no_cyl * private->rdc_data.trk_per_cyl)) { 12791da177e4SLinus Torvalds DEV_MESSAGE(KERN_INFO, device, "Track no %d too big!", 12801da177e4SLinus Torvalds fdata->start_unit); 12811da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 12821da177e4SLinus Torvalds } 12831da177e4SLinus Torvalds if (fdata->start_unit > fdata->stop_unit) { 12841da177e4SLinus Torvalds DEV_MESSAGE(KERN_INFO, device, "Track %d reached! ending.", 12851da177e4SLinus Torvalds fdata->start_unit); 12861da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 12871da177e4SLinus Torvalds } 12881da177e4SLinus Torvalds if (dasd_check_blocksize(fdata->blksize) != 0) { 12891da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, 12901da177e4SLinus Torvalds "Invalid blocksize %d...terminating!", 12911da177e4SLinus Torvalds fdata->blksize); 12921da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 12931da177e4SLinus Torvalds } 12941da177e4SLinus Torvalds 12951da177e4SLinus Torvalds /* 12961da177e4SLinus Torvalds * fdata->intensity is a bit string that tells us what to do: 12971da177e4SLinus Torvalds * Bit 0: write record zero 12981da177e4SLinus Torvalds * Bit 1: write home address, currently not supported 12991da177e4SLinus Torvalds * Bit 2: invalidate tracks 13001da177e4SLinus Torvalds * Bit 3: use OS/390 compatible disk layout (cdl) 1301f9a28f7bSJean-Baptiste Joret * Bit 4: do not allow storage subsystem to modify record zero 13021da177e4SLinus Torvalds * Only some bit combinations do make sense. 13031da177e4SLinus Torvalds */ 1304f9a28f7bSJean-Baptiste Joret if (fdata->intensity & 0x10) { 1305f9a28f7bSJean-Baptiste Joret r0_perm = 0; 1306f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity & ~0x10; 1307f9a28f7bSJean-Baptiste Joret } else { 1308f9a28f7bSJean-Baptiste Joret r0_perm = 1; 1309f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity; 1310f9a28f7bSJean-Baptiste Joret } 1311f9a28f7bSJean-Baptiste Joret switch (intensity) { 13121da177e4SLinus Torvalds case 0x00: /* Normal format */ 13131da177e4SLinus Torvalds case 0x08: /* Normal format, use cdl. */ 13141da177e4SLinus Torvalds cplength = 2 + rpt; 13151da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 13161da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 13171da177e4SLinus Torvalds rpt * sizeof(struct eckd_count); 13181da177e4SLinus Torvalds break; 13191da177e4SLinus Torvalds case 0x01: /* Write record zero and format track. */ 13201da177e4SLinus Torvalds case 0x09: /* Write record zero and format track, use cdl. */ 13211da177e4SLinus Torvalds cplength = 3 + rpt; 13221da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 13231da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 13241da177e4SLinus Torvalds sizeof(struct eckd_count) + 13251da177e4SLinus Torvalds rpt * sizeof(struct eckd_count); 13261da177e4SLinus Torvalds break; 13271da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 13281da177e4SLinus Torvalds case 0x0c: /* Invalidate track, use cdl. */ 13291da177e4SLinus Torvalds cplength = 3; 13301da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 13311da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 13321da177e4SLinus Torvalds sizeof(struct eckd_count); 13331da177e4SLinus Torvalds break; 13341da177e4SLinus Torvalds default: 13351da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "Invalid flags 0x%x.", 13361da177e4SLinus Torvalds fdata->intensity); 13371da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 13381da177e4SLinus Torvalds } 13391da177e4SLinus Torvalds /* Allocate the format ccw request. */ 13401da177e4SLinus Torvalds fcp = dasd_smalloc_request(dasd_eckd_discipline.name, 13411da177e4SLinus Torvalds cplength, datasize, device); 13421da177e4SLinus Torvalds if (IS_ERR(fcp)) 13431da177e4SLinus Torvalds return fcp; 13441da177e4SLinus Torvalds 13451da177e4SLinus Torvalds data = fcp->data; 13461da177e4SLinus Torvalds ccw = fcp->cpaddr; 13471da177e4SLinus Torvalds 1348f9a28f7bSJean-Baptiste Joret switch (intensity & ~0x08) { 13491da177e4SLinus Torvalds case 0x00: /* Normal format. */ 13501da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 13511da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 13521da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device); 1353f9a28f7bSJean-Baptiste Joret /* grant subsystem permission to format R0 */ 1354f9a28f7bSJean-Baptiste Joret if (r0_perm) 1355f9a28f7bSJean-Baptiste Joret ((struct DE_eckd_data *)data)->ga_extended |= 0x04; 13561da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 13571da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 13581da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 13591da177e4SLinus Torvalds fdata->start_unit, 0, rpt, 13601da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device, 13611da177e4SLinus Torvalds fdata->blksize); 13621da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 13631da177e4SLinus Torvalds break; 13641da177e4SLinus Torvalds case 0x01: /* Write record zero + format track. */ 13651da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 13661da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 13671da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, 13681da177e4SLinus Torvalds device); 13691da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 13701da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 13711da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 13721da177e4SLinus Torvalds fdata->start_unit, 0, rpt + 1, 13731da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, device, 13748e09f215SStefan Weinhuber device->block->bp_block); 13751da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 13761da177e4SLinus Torvalds break; 13771da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 13781da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 13791da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 13801da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device); 13811da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 13821da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 13831da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 13841da177e4SLinus Torvalds fdata->start_unit, 0, 1, 13851da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device, 8); 13861da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 13871da177e4SLinus Torvalds break; 13881da177e4SLinus Torvalds } 1389f9a28f7bSJean-Baptiste Joret if (intensity & 0x01) { /* write record zero */ 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 = 0; 13951da177e4SLinus Torvalds ect->kl = 0; 13961da177e4SLinus Torvalds ect->dl = 8; 13971da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 13981da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 13991da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 14001da177e4SLinus Torvalds ccw->count = 8; 14011da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 14021da177e4SLinus Torvalds ccw++; 14031da177e4SLinus Torvalds } 1404f9a28f7bSJean-Baptiste Joret if ((intensity & ~0x08) & 0x04) { /* erase track */ 14051da177e4SLinus Torvalds ect = (struct eckd_count *) data; 14061da177e4SLinus Torvalds data += sizeof(struct eckd_count); 14071da177e4SLinus Torvalds ect->cyl = cyl; 14081da177e4SLinus Torvalds ect->head = head; 14091da177e4SLinus Torvalds ect->record = 1; 14101da177e4SLinus Torvalds ect->kl = 0; 14111da177e4SLinus Torvalds ect->dl = 0; 14121da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 14131da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 14141da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 14151da177e4SLinus Torvalds ccw->count = 8; 14161da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 14171da177e4SLinus Torvalds } else { /* write remaining records */ 14181da177e4SLinus Torvalds for (i = 0; i < rpt; i++) { 14191da177e4SLinus Torvalds ect = (struct eckd_count *) data; 14201da177e4SLinus Torvalds data += sizeof(struct eckd_count); 14211da177e4SLinus Torvalds ect->cyl = cyl; 14221da177e4SLinus Torvalds ect->head = head; 14231da177e4SLinus Torvalds ect->record = i + 1; 14241da177e4SLinus Torvalds ect->kl = 0; 14251da177e4SLinus Torvalds ect->dl = fdata->blksize; 14261da177e4SLinus Torvalds /* Check for special tracks 0-1 when formatting CDL */ 1427f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 14281da177e4SLinus Torvalds fdata->start_unit == 0) { 14291da177e4SLinus Torvalds if (i < 3) { 14301da177e4SLinus Torvalds ect->kl = 4; 14311da177e4SLinus Torvalds ect->dl = sizes_trk0[i] - 4; 14321da177e4SLinus Torvalds } 14331da177e4SLinus Torvalds } 1434f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 14351da177e4SLinus Torvalds fdata->start_unit == 1) { 14361da177e4SLinus Torvalds ect->kl = 44; 14371da177e4SLinus Torvalds ect->dl = LABEL_SIZE - 44; 14381da177e4SLinus Torvalds } 14391da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 14401da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 14411da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 14421da177e4SLinus Torvalds ccw->count = 8; 14431da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 14441da177e4SLinus Torvalds ccw++; 14451da177e4SLinus Torvalds } 14461da177e4SLinus Torvalds } 14478e09f215SStefan Weinhuber fcp->startdev = device; 14488e09f215SStefan Weinhuber fcp->memdev = device; 14498e09f215SStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &fcp->flags); 14508e09f215SStefan Weinhuber fcp->retries = 5; /* set retry counter to enable default ERP */ 14511da177e4SLinus Torvalds fcp->buildclk = get_clock(); 14521da177e4SLinus Torvalds fcp->status = DASD_CQR_FILLED; 14531da177e4SLinus Torvalds return fcp; 14541da177e4SLinus Torvalds } 14551da177e4SLinus Torvalds 14568e09f215SStefan Weinhuber static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 14571da177e4SLinus Torvalds { 14588e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 14598e09f215SStefan Weinhuber if (cqr->block && (cqr->startdev != cqr->block->base)) { 14608e09f215SStefan Weinhuber dasd_eckd_reset_ccw_to_base_io(cqr); 14618e09f215SStefan Weinhuber cqr->startdev = cqr->block->base; 14621da177e4SLinus Torvalds } 14638e09f215SStefan Weinhuber }; 14641da177e4SLinus Torvalds 14651da177e4SLinus Torvalds static dasd_erp_fn_t 14661da177e4SLinus Torvalds dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 14671da177e4SLinus Torvalds { 14688e09f215SStefan Weinhuber struct dasd_device *device = (struct dasd_device *) cqr->startdev; 14691da177e4SLinus Torvalds struct ccw_device *cdev = device->cdev; 14701da177e4SLinus Torvalds 14711da177e4SLinus Torvalds switch (cdev->id.cu_type) { 14721da177e4SLinus Torvalds case 0x3990: 14731da177e4SLinus Torvalds case 0x2105: 14741da177e4SLinus Torvalds case 0x2107: 14751da177e4SLinus Torvalds case 0x1750: 14761da177e4SLinus Torvalds return dasd_3990_erp_action; 14771da177e4SLinus Torvalds case 0x9343: 14781da177e4SLinus Torvalds case 0x3880: 14791da177e4SLinus Torvalds default: 14801da177e4SLinus Torvalds return dasd_default_erp_action; 14811da177e4SLinus Torvalds } 14821da177e4SLinus Torvalds } 14831da177e4SLinus Torvalds 14841da177e4SLinus Torvalds static dasd_erp_fn_t 14851da177e4SLinus Torvalds dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 14861da177e4SLinus Torvalds { 14871da177e4SLinus Torvalds return dasd_default_erp_postaction; 14881da177e4SLinus Torvalds } 14891da177e4SLinus Torvalds 14908e09f215SStefan Weinhuber 14918e09f215SStefan Weinhuber static void dasd_eckd_handle_unsolicited_interrupt(struct dasd_device *device, 14928e09f215SStefan Weinhuber struct irb *irb) 14938e09f215SStefan Weinhuber { 14948e09f215SStefan Weinhuber char mask; 14958e09f215SStefan Weinhuber 14968e09f215SStefan Weinhuber /* first of all check for state change pending interrupt */ 14978e09f215SStefan Weinhuber mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 149823d805b6SPeter Oberparleiter if ((irb->scsw.cmd.dstat & mask) == mask) { 14998e09f215SStefan Weinhuber dasd_generic_handle_state_change(device); 15008e09f215SStefan Weinhuber return; 15018e09f215SStefan Weinhuber } 15028e09f215SStefan Weinhuber 15038e09f215SStefan Weinhuber /* summary unit check */ 150423d805b6SPeter Oberparleiter if ((irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) && 150523d805b6SPeter Oberparleiter (irb->ecw[7] == 0x0D)) { 15068e09f215SStefan Weinhuber dasd_alias_handle_summary_unit_check(device, irb); 15078e09f215SStefan Weinhuber return; 15088e09f215SStefan Weinhuber } 15098e09f215SStefan Weinhuber 1510f60c768cSStefan Haberland 1511f60c768cSStefan Haberland /* service information message SIM */ 151250afd20fSStefan Haberland if (irb->esw.esw0.erw.cons && !(irb->ecw[27] & DASD_SENSE_BIT_0) && 15139d853cafSStefan Haberland ((irb->ecw[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 1514f60c768cSStefan Haberland dasd_3990_erp_handle_sim(device, irb->ecw); 15159d853cafSStefan Haberland dasd_schedule_device_bh(device); 1516f60c768cSStefan Haberland return; 1517f60c768cSStefan Haberland } 1518f60c768cSStefan Haberland 1519ada3df91SStefan Haberland if ((irb->scsw.cmd.cc == 1) && 1520ada3df91SStefan Haberland (irb->scsw.cmd.fctl & SCSW_FCTL_START_FUNC) && 1521ada3df91SStefan Haberland (irb->scsw.cmd.actl & SCSW_ACTL_START_PEND) && 1522ada3df91SStefan Haberland (irb->scsw.cmd.stctl & SCSW_STCTL_STATUS_PEND)) { 1523ada3df91SStefan Haberland /* fake irb do nothing, they are handled elsewhere */ 15248e09f215SStefan Weinhuber dasd_schedule_device_bh(device); 1525ada3df91SStefan Haberland return; 1526ada3df91SStefan Haberland } 15278e09f215SStefan Weinhuber 1528ada3df91SStefan Haberland if (!(irb->esw.esw0.erw.cons)) { 1529ada3df91SStefan Haberland /* just report other unsolicited interrupts */ 1530ada3df91SStefan Haberland DEV_MESSAGE(KERN_ERR, device, "%s", 1531ada3df91SStefan Haberland "unsolicited interrupt received"); 1532ada3df91SStefan Haberland } else { 1533ada3df91SStefan Haberland DEV_MESSAGE(KERN_ERR, device, "%s", 1534ada3df91SStefan Haberland "unsolicited interrupt received " 1535ada3df91SStefan Haberland "(sense available)"); 1536ada3df91SStefan Haberland device->discipline->dump_sense(device, NULL, irb); 1537ada3df91SStefan Haberland } 1538ada3df91SStefan Haberland 1539ada3df91SStefan Haberland dasd_schedule_device_bh(device); 15408e09f215SStefan Weinhuber return; 15418e09f215SStefan Weinhuber }; 15428e09f215SStefan Weinhuber 15438e09f215SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 15448e09f215SStefan Weinhuber struct dasd_block *block, 15458e09f215SStefan Weinhuber struct request *req) 15461da177e4SLinus Torvalds { 15471da177e4SLinus Torvalds struct dasd_eckd_private *private; 15481da177e4SLinus Torvalds unsigned long *idaws; 15491da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 15501da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 15511da177e4SLinus Torvalds struct ccw1 *ccw; 15525705f702SNeilBrown struct req_iterator iter; 15531da177e4SLinus Torvalds struct bio_vec *bv; 15541da177e4SLinus Torvalds char *dst; 15551da177e4SLinus Torvalds unsigned int blksize, blk_per_trk, off; 15561da177e4SLinus Torvalds int count, cidaw, cplength, datasize; 15571da177e4SLinus Torvalds sector_t recid, first_rec, last_rec; 15581da177e4SLinus Torvalds sector_t first_trk, last_trk; 15591da177e4SLinus Torvalds unsigned int first_offs, last_offs; 15601da177e4SLinus Torvalds unsigned char cmd, rcmd; 15618e09f215SStefan Weinhuber int use_prefix; 15628e09f215SStefan Weinhuber struct dasd_device *basedev; 15631da177e4SLinus Torvalds 15648e09f215SStefan Weinhuber basedev = block->base; 15658e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 15661da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 15671da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_READ_MT; 15681da177e4SLinus Torvalds else if (rq_data_dir(req) == WRITE) 15691da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_WRITE_MT; 15701da177e4SLinus Torvalds else 15711da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 15721da177e4SLinus Torvalds /* Calculate number of blocks/records per track. */ 15738e09f215SStefan Weinhuber blksize = block->bp_block; 15741da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 15751da177e4SLinus Torvalds /* Calculate record id of first and last block. */ 15768e09f215SStefan Weinhuber first_rec = first_trk = req->sector >> block->s2b_shift; 15771da177e4SLinus Torvalds first_offs = sector_div(first_trk, blk_per_trk); 15781da177e4SLinus Torvalds last_rec = last_trk = 15798e09f215SStefan Weinhuber (req->sector + req->nr_sectors - 1) >> block->s2b_shift; 15801da177e4SLinus Torvalds last_offs = sector_div(last_trk, blk_per_trk); 15811da177e4SLinus Torvalds /* Check struct bio and count the number of blocks for the request. */ 15821da177e4SLinus Torvalds count = 0; 15831da177e4SLinus Torvalds cidaw = 0; 15845705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 15851da177e4SLinus Torvalds if (bv->bv_len & (blksize - 1)) 15861da177e4SLinus Torvalds /* Eckd can only do full blocks. */ 15871da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 15888e09f215SStefan Weinhuber count += bv->bv_len >> (block->s2b_shift + 9); 1589347a8dc3SMartin Schwidefsky #if defined(CONFIG_64BIT) 15906c92e699SJens Axboe if (idal_is_needed (page_address(bv->bv_page), bv->bv_len)) 15918e09f215SStefan Weinhuber cidaw += bv->bv_len >> (block->s2b_shift + 9); 15921da177e4SLinus Torvalds #endif 15931da177e4SLinus Torvalds } 15941da177e4SLinus Torvalds /* Paranoia. */ 15951da177e4SLinus Torvalds if (count != last_rec - first_rec + 1) 15961da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 15978e09f215SStefan Weinhuber 15988e09f215SStefan Weinhuber /* use the prefix command if available */ 15998e09f215SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 16008e09f215SStefan Weinhuber if (use_prefix) { 16018e09f215SStefan Weinhuber /* 1x prefix + number of blocks */ 16028e09f215SStefan Weinhuber cplength = 2 + count; 16038e09f215SStefan Weinhuber /* 1x prefix + cidaws*sizeof(long) */ 16048e09f215SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 16058e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 16068e09f215SStefan Weinhuber cidaw * sizeof(unsigned long); 16078e09f215SStefan Weinhuber } else { 16081da177e4SLinus Torvalds /* 1x define extent + 1x locate record + number of blocks */ 16091da177e4SLinus Torvalds cplength = 2 + count; 16101da177e4SLinus Torvalds /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 16118e09f215SStefan Weinhuber datasize = sizeof(struct DE_eckd_data) + 16128e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 16131da177e4SLinus Torvalds cidaw * sizeof(unsigned long); 16148e09f215SStefan Weinhuber } 16151da177e4SLinus Torvalds /* Find out the number of additional locate record ccws for cdl. */ 16161da177e4SLinus Torvalds if (private->uses_cdl && first_rec < 2*blk_per_trk) { 16171da177e4SLinus Torvalds if (last_rec >= 2*blk_per_trk) 16181da177e4SLinus Torvalds count = 2*blk_per_trk - first_rec; 16191da177e4SLinus Torvalds cplength += count; 16201da177e4SLinus Torvalds datasize += count*sizeof(struct LO_eckd_data); 16211da177e4SLinus Torvalds } 16221da177e4SLinus Torvalds /* Allocate the ccw request. */ 16231da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 16248e09f215SStefan Weinhuber cplength, datasize, startdev); 16251da177e4SLinus Torvalds if (IS_ERR(cqr)) 16261da177e4SLinus Torvalds return cqr; 16271da177e4SLinus Torvalds ccw = cqr->cpaddr; 16288e09f215SStefan Weinhuber /* First ccw is define extent or prefix. */ 16298e09f215SStefan Weinhuber if (use_prefix) { 16308e09f215SStefan Weinhuber if (prefix(ccw++, cqr->data, first_trk, 16318e09f215SStefan Weinhuber last_trk, cmd, basedev, startdev) == -EAGAIN) { 16328e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 16338e09f215SStefan Weinhuber * Try again later. 16348e09f215SStefan Weinhuber */ 16358e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 1636d54853efSMartin Schwidefsky return ERR_PTR(-EAGAIN); 1637d54853efSMartin Schwidefsky } 16388e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 16398e09f215SStefan Weinhuber sizeof(struct PFX_eckd_data)); 16408e09f215SStefan Weinhuber } else { 16418e09f215SStefan Weinhuber if (define_extent(ccw++, cqr->data, first_trk, 16428e09f215SStefan Weinhuber last_trk, cmd, startdev) == -EAGAIN) { 16438e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 16448e09f215SStefan Weinhuber * Try again later. 16458e09f215SStefan Weinhuber */ 16468e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 16478e09f215SStefan Weinhuber return ERR_PTR(-EAGAIN); 16488e09f215SStefan Weinhuber } 16498e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 16508e09f215SStefan Weinhuber sizeof(struct DE_eckd_data)); 16518e09f215SStefan Weinhuber } 16521da177e4SLinus Torvalds /* Build locate_record+read/write/ccws. */ 16531da177e4SLinus Torvalds LO_data = (struct LO_eckd_data *) (idaws + cidaw); 16541da177e4SLinus Torvalds recid = first_rec; 16551da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 16561da177e4SLinus Torvalds /* Only standard blocks so there is just one locate record. */ 16571da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 16581da177e4SLinus Torvalds locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 16598e09f215SStefan Weinhuber last_rec - recid + 1, cmd, basedev, blksize); 16601da177e4SLinus Torvalds } 16615705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 16621da177e4SLinus Torvalds dst = page_address(bv->bv_page) + bv->bv_offset; 16631da177e4SLinus Torvalds if (dasd_page_cache) { 16641da177e4SLinus Torvalds char *copy = kmem_cache_alloc(dasd_page_cache, 1665441e143eSChristoph Lameter GFP_DMA | __GFP_NOWARN); 16661da177e4SLinus Torvalds if (copy && rq_data_dir(req) == WRITE) 16671da177e4SLinus Torvalds memcpy(copy + bv->bv_offset, dst, bv->bv_len); 16681da177e4SLinus Torvalds if (copy) 16691da177e4SLinus Torvalds dst = copy + bv->bv_offset; 16701da177e4SLinus Torvalds } 16711da177e4SLinus Torvalds for (off = 0; off < bv->bv_len; off += blksize) { 16721da177e4SLinus Torvalds sector_t trkid = recid; 16731da177e4SLinus Torvalds unsigned int recoffs = sector_div(trkid, blk_per_trk); 16741da177e4SLinus Torvalds rcmd = cmd; 16751da177e4SLinus Torvalds count = blksize; 16761da177e4SLinus Torvalds /* Locate record for cdl special block ? */ 16771da177e4SLinus Torvalds if (private->uses_cdl && recid < 2*blk_per_trk) { 16781da177e4SLinus Torvalds if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 16791da177e4SLinus Torvalds rcmd |= 0x8; 16801da177e4SLinus Torvalds count = dasd_eckd_cdl_reclen(recid); 1681ec5883abSHorst Hummel if (count < blksize && 1682ec5883abSHorst Hummel rq_data_dir(req) == READ) 16831da177e4SLinus Torvalds memset(dst + count, 0xe5, 16841da177e4SLinus Torvalds blksize - count); 16851da177e4SLinus Torvalds } 16861da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 16871da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 16881da177e4SLinus Torvalds trkid, recoffs + 1, 16898e09f215SStefan Weinhuber 1, rcmd, basedev, count); 16901da177e4SLinus Torvalds } 16911da177e4SLinus Torvalds /* Locate record for standard blocks ? */ 16921da177e4SLinus Torvalds if (private->uses_cdl && recid == 2*blk_per_trk) { 16931da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 16941da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 16951da177e4SLinus Torvalds trkid, recoffs + 1, 16961da177e4SLinus Torvalds last_rec - recid + 1, 16978e09f215SStefan Weinhuber cmd, basedev, count); 16981da177e4SLinus Torvalds } 16991da177e4SLinus Torvalds /* Read/write ccw. */ 17001da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 17011da177e4SLinus Torvalds ccw->cmd_code = rcmd; 17021da177e4SLinus Torvalds ccw->count = count; 17031da177e4SLinus Torvalds if (idal_is_needed(dst, blksize)) { 17041da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) idaws; 17051da177e4SLinus Torvalds ccw->flags = CCW_FLAG_IDA; 17061da177e4SLinus Torvalds idaws = idal_create_words(idaws, dst, blksize); 17071da177e4SLinus Torvalds } else { 17081da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) dst; 17091da177e4SLinus Torvalds ccw->flags = 0; 17101da177e4SLinus Torvalds } 17111da177e4SLinus Torvalds ccw++; 17121da177e4SLinus Torvalds dst += blksize; 17131da177e4SLinus Torvalds recid++; 17141da177e4SLinus Torvalds } 17151da177e4SLinus Torvalds } 171613de227bSHolger Smolinski if (blk_noretry_request(req) || 171713de227bSHolger Smolinski block->base->features & DASD_FEATURE_FAILFAST) 17181c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 17198e09f215SStefan Weinhuber cqr->startdev = startdev; 17208e09f215SStefan Weinhuber cqr->memdev = startdev; 17218e09f215SStefan Weinhuber cqr->block = block; 17221da177e4SLinus Torvalds cqr->expires = 5 * 60 * HZ; /* 5 minutes */ 17231da177e4SLinus Torvalds cqr->lpm = private->path_data.ppm; 17241da177e4SLinus Torvalds cqr->retries = 256; 17251da177e4SLinus Torvalds cqr->buildclk = get_clock(); 17261da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 17271da177e4SLinus Torvalds return cqr; 17281da177e4SLinus Torvalds } 17291da177e4SLinus Torvalds 17301da177e4SLinus Torvalds static int 17311da177e4SLinus Torvalds dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 17321da177e4SLinus Torvalds { 17331da177e4SLinus Torvalds struct dasd_eckd_private *private; 17341da177e4SLinus Torvalds struct ccw1 *ccw; 17355705f702SNeilBrown struct req_iterator iter; 17361da177e4SLinus Torvalds struct bio_vec *bv; 17371da177e4SLinus Torvalds char *dst, *cda; 17381da177e4SLinus Torvalds unsigned int blksize, blk_per_trk, off; 17391da177e4SLinus Torvalds sector_t recid; 17405705f702SNeilBrown int status; 17411da177e4SLinus Torvalds 17421da177e4SLinus Torvalds if (!dasd_page_cache) 17431da177e4SLinus Torvalds goto out; 17448e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) cqr->block->base->private; 17458e09f215SStefan Weinhuber blksize = cqr->block->bp_block; 17461da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 17478e09f215SStefan Weinhuber recid = req->sector >> cqr->block->s2b_shift; 17481da177e4SLinus Torvalds ccw = cqr->cpaddr; 17491da177e4SLinus Torvalds /* Skip over define extent & locate record. */ 17501da177e4SLinus Torvalds ccw++; 17511da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 17521da177e4SLinus Torvalds ccw++; 17535705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 17541da177e4SLinus Torvalds dst = page_address(bv->bv_page) + bv->bv_offset; 17551da177e4SLinus Torvalds for (off = 0; off < bv->bv_len; off += blksize) { 17561da177e4SLinus Torvalds /* Skip locate record. */ 17571da177e4SLinus Torvalds if (private->uses_cdl && recid <= 2*blk_per_trk) 17581da177e4SLinus Torvalds ccw++; 17591da177e4SLinus Torvalds if (dst) { 17601da177e4SLinus Torvalds if (ccw->flags & CCW_FLAG_IDA) 17611da177e4SLinus Torvalds cda = *((char **)((addr_t) ccw->cda)); 17621da177e4SLinus Torvalds else 17631da177e4SLinus Torvalds cda = (char *)((addr_t) ccw->cda); 17641da177e4SLinus Torvalds if (dst != cda) { 17651da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 17661da177e4SLinus Torvalds memcpy(dst, cda, bv->bv_len); 17671da177e4SLinus Torvalds kmem_cache_free(dasd_page_cache, 17681da177e4SLinus Torvalds (void *)((addr_t)cda & PAGE_MASK)); 17691da177e4SLinus Torvalds } 17701da177e4SLinus Torvalds dst = NULL; 17711da177e4SLinus Torvalds } 17721da177e4SLinus Torvalds ccw++; 17731da177e4SLinus Torvalds recid++; 17741da177e4SLinus Torvalds } 17751da177e4SLinus Torvalds } 17761da177e4SLinus Torvalds out: 17771da177e4SLinus Torvalds status = cqr->status == DASD_CQR_DONE; 17788e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 17791da177e4SLinus Torvalds return status; 17801da177e4SLinus Torvalds } 17811da177e4SLinus Torvalds 17828e09f215SStefan Weinhuber /* 17838e09f215SStefan Weinhuber * Modify ccw chain in cqr so it can be started on a base device. 17848e09f215SStefan Weinhuber * 17858e09f215SStefan Weinhuber * Note that this is not enough to restart the cqr! 17868e09f215SStefan Weinhuber * Either reset cqr->startdev as well (summary unit check handling) 17878e09f215SStefan Weinhuber * or restart via separate cqr (as in ERP handling). 17888e09f215SStefan Weinhuber */ 17898e09f215SStefan Weinhuber void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 17908e09f215SStefan Weinhuber { 17918e09f215SStefan Weinhuber struct ccw1 *ccw; 17928e09f215SStefan Weinhuber struct PFX_eckd_data *pfxdata; 17938e09f215SStefan Weinhuber 17948e09f215SStefan Weinhuber ccw = cqr->cpaddr; 17958e09f215SStefan Weinhuber pfxdata = cqr->data; 17968e09f215SStefan Weinhuber 17978e09f215SStefan Weinhuber if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 17988e09f215SStefan Weinhuber pfxdata->validity.verify_base = 0; 17998e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 18008e09f215SStefan Weinhuber } 18018e09f215SStefan Weinhuber } 18028e09f215SStefan Weinhuber 18038e09f215SStefan Weinhuber #define DASD_ECKD_CHANQ_MAX_SIZE 4 18048e09f215SStefan Weinhuber 18058e09f215SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 18068e09f215SStefan Weinhuber struct dasd_block *block, 18078e09f215SStefan Weinhuber struct request *req) 18088e09f215SStefan Weinhuber { 18098e09f215SStefan Weinhuber struct dasd_eckd_private *private; 18108e09f215SStefan Weinhuber struct dasd_device *startdev; 18118e09f215SStefan Weinhuber unsigned long flags; 18128e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 18138e09f215SStefan Weinhuber 18148e09f215SStefan Weinhuber startdev = dasd_alias_get_start_dev(base); 18158e09f215SStefan Weinhuber if (!startdev) 18168e09f215SStefan Weinhuber startdev = base; 18178e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) startdev->private; 18188e09f215SStefan Weinhuber if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 18198e09f215SStefan Weinhuber return ERR_PTR(-EBUSY); 18208e09f215SStefan Weinhuber 18218e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 18228e09f215SStefan Weinhuber private->count++; 18238e09f215SStefan Weinhuber cqr = dasd_eckd_build_cp(startdev, block, req); 18248e09f215SStefan Weinhuber if (IS_ERR(cqr)) 18258e09f215SStefan Weinhuber private->count--; 18268e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 18278e09f215SStefan Weinhuber return cqr; 18288e09f215SStefan Weinhuber } 18298e09f215SStefan Weinhuber 18308e09f215SStefan Weinhuber static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 18318e09f215SStefan Weinhuber struct request *req) 18328e09f215SStefan Weinhuber { 18338e09f215SStefan Weinhuber struct dasd_eckd_private *private; 18348e09f215SStefan Weinhuber unsigned long flags; 18358e09f215SStefan Weinhuber 18368e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 18378e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) cqr->memdev->private; 18388e09f215SStefan Weinhuber private->count--; 18398e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 18408e09f215SStefan Weinhuber return dasd_eckd_free_cp(cqr, req); 18418e09f215SStefan Weinhuber } 18428e09f215SStefan Weinhuber 18431da177e4SLinus Torvalds static int 18441da177e4SLinus Torvalds dasd_eckd_fill_info(struct dasd_device * device, 18451da177e4SLinus Torvalds struct dasd_information2_t * info) 18461da177e4SLinus Torvalds { 18471da177e4SLinus Torvalds struct dasd_eckd_private *private; 18481da177e4SLinus Torvalds 18491da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 18501da177e4SLinus Torvalds info->label_block = 2; 18511da177e4SLinus Torvalds info->FBA_layout = private->uses_cdl ? 0 : 1; 18521da177e4SLinus Torvalds info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 18531da177e4SLinus Torvalds info->characteristics_size = sizeof(struct dasd_eckd_characteristics); 18541da177e4SLinus Torvalds memcpy(info->characteristics, &private->rdc_data, 18551da177e4SLinus Torvalds sizeof(struct dasd_eckd_characteristics)); 18564abb08c2SStefan Weinhuber info->confdata_size = min((unsigned long)private->conf_len, 18574abb08c2SStefan Weinhuber sizeof(info->configuration_data)); 18584abb08c2SStefan Weinhuber memcpy(info->configuration_data, private->conf_data, 18594abb08c2SStefan Weinhuber info->confdata_size); 18601da177e4SLinus Torvalds return 0; 18611da177e4SLinus Torvalds } 18621da177e4SLinus Torvalds 18631da177e4SLinus Torvalds /* 18641da177e4SLinus Torvalds * SECTION: ioctl functions for eckd devices. 18651da177e4SLinus Torvalds */ 18661da177e4SLinus Torvalds 18671da177e4SLinus Torvalds /* 18681da177e4SLinus Torvalds * Release device ioctl. 18691da177e4SLinus Torvalds * Buils a channel programm to releases a prior reserved 18701da177e4SLinus Torvalds * (see dasd_eckd_reserve) device. 18711da177e4SLinus Torvalds */ 18721da177e4SLinus Torvalds static int 18731107ccfbSChristoph Hellwig dasd_eckd_release(struct dasd_device *device) 18741da177e4SLinus Torvalds { 18751da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 18761da177e4SLinus Torvalds int rc; 18771da177e4SLinus Torvalds 18781da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 18791da177e4SLinus Torvalds return -EACCES; 18801da177e4SLinus Torvalds 18811da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 18821da177e4SLinus Torvalds 1, 32, device); 18831da177e4SLinus Torvalds if (IS_ERR(cqr)) { 18841da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 18851da177e4SLinus Torvalds "Could not allocate initialization request"); 18861da177e4SLinus Torvalds return PTR_ERR(cqr); 18871da177e4SLinus Torvalds } 18881da177e4SLinus Torvalds cqr->cpaddr->cmd_code = DASD_ECKD_CCW_RELEASE; 18891da177e4SLinus Torvalds cqr->cpaddr->flags |= CCW_FLAG_SLI; 18901da177e4SLinus Torvalds cqr->cpaddr->count = 32; 18911da177e4SLinus Torvalds cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; 18928e09f215SStefan Weinhuber cqr->startdev = device; 18938e09f215SStefan Weinhuber cqr->memdev = device; 18941da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 18951c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 1896336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 18971da177e4SLinus Torvalds cqr->expires = 2 * HZ; 18981da177e4SLinus Torvalds cqr->buildclk = get_clock(); 18991da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 19001da177e4SLinus Torvalds 19011da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 19021da177e4SLinus Torvalds 19038e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 19041da177e4SLinus Torvalds return rc; 19051da177e4SLinus Torvalds } 19061da177e4SLinus Torvalds 19071da177e4SLinus Torvalds /* 19081da177e4SLinus Torvalds * Reserve device ioctl. 19091da177e4SLinus Torvalds * Options are set to 'synchronous wait for interrupt' and 19101da177e4SLinus Torvalds * 'timeout the request'. This leads to a terminate IO if 19111da177e4SLinus Torvalds * the interrupt is outstanding for a certain time. 19121da177e4SLinus Torvalds */ 19131da177e4SLinus Torvalds static int 19141107ccfbSChristoph Hellwig dasd_eckd_reserve(struct dasd_device *device) 19151da177e4SLinus Torvalds { 19161da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 19171da177e4SLinus Torvalds int rc; 19181da177e4SLinus Torvalds 19191da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 19201da177e4SLinus Torvalds return -EACCES; 19211da177e4SLinus Torvalds 19221da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 19231da177e4SLinus Torvalds 1, 32, device); 19241da177e4SLinus Torvalds if (IS_ERR(cqr)) { 19251da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 19261da177e4SLinus Torvalds "Could not allocate initialization request"); 19271da177e4SLinus Torvalds return PTR_ERR(cqr); 19281da177e4SLinus Torvalds } 19291da177e4SLinus Torvalds cqr->cpaddr->cmd_code = DASD_ECKD_CCW_RESERVE; 19301da177e4SLinus Torvalds cqr->cpaddr->flags |= CCW_FLAG_SLI; 19311da177e4SLinus Torvalds cqr->cpaddr->count = 32; 19321da177e4SLinus Torvalds cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; 19338e09f215SStefan Weinhuber cqr->startdev = device; 19348e09f215SStefan Weinhuber cqr->memdev = device; 19351da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 19361c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 1937336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 19381da177e4SLinus Torvalds cqr->expires = 2 * HZ; 19391da177e4SLinus Torvalds cqr->buildclk = get_clock(); 19401da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 19411da177e4SLinus Torvalds 19421da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 19431da177e4SLinus Torvalds 19448e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 19451da177e4SLinus Torvalds return rc; 19461da177e4SLinus Torvalds } 19471da177e4SLinus Torvalds 19481da177e4SLinus Torvalds /* 19491da177e4SLinus Torvalds * Steal lock ioctl - unconditional reserve device. 19501da177e4SLinus Torvalds * Buils a channel programm to break a device's reservation. 19511da177e4SLinus Torvalds * (unconditional reserve) 19521da177e4SLinus Torvalds */ 19531da177e4SLinus Torvalds static int 19541107ccfbSChristoph Hellwig dasd_eckd_steal_lock(struct dasd_device *device) 19551da177e4SLinus Torvalds { 19561da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 19571da177e4SLinus Torvalds int rc; 19581da177e4SLinus Torvalds 19591da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 19601da177e4SLinus Torvalds return -EACCES; 19611da177e4SLinus Torvalds 19621da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 19631da177e4SLinus Torvalds 1, 32, device); 19641da177e4SLinus Torvalds if (IS_ERR(cqr)) { 19651da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 19661da177e4SLinus Torvalds "Could not allocate initialization request"); 19671da177e4SLinus Torvalds return PTR_ERR(cqr); 19681da177e4SLinus Torvalds } 19691da177e4SLinus Torvalds cqr->cpaddr->cmd_code = DASD_ECKD_CCW_SLCK; 19701da177e4SLinus Torvalds cqr->cpaddr->flags |= CCW_FLAG_SLI; 19711da177e4SLinus Torvalds cqr->cpaddr->count = 32; 19721da177e4SLinus Torvalds cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; 19738e09f215SStefan Weinhuber cqr->startdev = device; 19748e09f215SStefan Weinhuber cqr->memdev = device; 19751da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 19761c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 1977336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 19781da177e4SLinus Torvalds cqr->expires = 2 * HZ; 19791da177e4SLinus Torvalds cqr->buildclk = get_clock(); 19801da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 19811da177e4SLinus Torvalds 19821da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 19831da177e4SLinus Torvalds 19848e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 19851da177e4SLinus Torvalds return rc; 19861da177e4SLinus Torvalds } 19871da177e4SLinus Torvalds 19881da177e4SLinus Torvalds /* 19891da177e4SLinus Torvalds * Read performance statistics 19901da177e4SLinus Torvalds */ 19911da177e4SLinus Torvalds static int 19921107ccfbSChristoph Hellwig dasd_eckd_performance(struct dasd_device *device, void __user *argp) 19931da177e4SLinus Torvalds { 19941da177e4SLinus Torvalds struct dasd_psf_prssd_data *prssdp; 19951da177e4SLinus Torvalds struct dasd_rssd_perf_stats_t *stats; 19961da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 19971da177e4SLinus Torvalds struct ccw1 *ccw; 19981da177e4SLinus Torvalds int rc; 19991da177e4SLinus Torvalds 20001da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 20011da177e4SLinus Torvalds 1 /* PSF */ + 1 /* RSSD */ , 20021da177e4SLinus Torvalds (sizeof(struct dasd_psf_prssd_data) + 20031da177e4SLinus Torvalds sizeof(struct dasd_rssd_perf_stats_t)), 20041da177e4SLinus Torvalds device); 20051da177e4SLinus Torvalds if (IS_ERR(cqr)) { 20061da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 20071da177e4SLinus Torvalds "Could not allocate initialization request"); 20081da177e4SLinus Torvalds return PTR_ERR(cqr); 20091da177e4SLinus Torvalds } 20108e09f215SStefan Weinhuber cqr->startdev = device; 20118e09f215SStefan Weinhuber cqr->memdev = device; 20121da177e4SLinus Torvalds cqr->retries = 0; 20131da177e4SLinus Torvalds cqr->expires = 10 * HZ; 20141da177e4SLinus Torvalds 20151da177e4SLinus Torvalds /* Prepare for Read Subsystem Data */ 20161da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 20171da177e4SLinus Torvalds memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 20181da177e4SLinus Torvalds prssdp->order = PSF_ORDER_PRSSD; 20195d67d164SJoe Perches prssdp->suborder = 0x01; /* Performance Statistics */ 20201da177e4SLinus Torvalds prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 20211da177e4SLinus Torvalds 20221da177e4SLinus Torvalds ccw = cqr->cpaddr; 20231da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_PSF; 20241da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_psf_prssd_data); 20251da177e4SLinus Torvalds ccw->flags |= CCW_FLAG_CC; 20261da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) prssdp; 20271da177e4SLinus Torvalds 20281da177e4SLinus Torvalds /* Read Subsystem Data - Performance Statistics */ 20291da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 20301da177e4SLinus Torvalds memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 20311da177e4SLinus Torvalds 20321da177e4SLinus Torvalds ccw++; 20331da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_RSSD; 20341da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 20351da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) stats; 20361da177e4SLinus Torvalds 20371da177e4SLinus Torvalds cqr->buildclk = get_clock(); 20381da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 20391da177e4SLinus Torvalds rc = dasd_sleep_on(cqr); 20401da177e4SLinus Torvalds if (rc == 0) { 20411da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 20421da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 20431107ccfbSChristoph Hellwig if (copy_to_user(argp, stats, 20441107ccfbSChristoph Hellwig sizeof(struct dasd_rssd_perf_stats_t))) 20451107ccfbSChristoph Hellwig rc = -EFAULT; 20461da177e4SLinus Torvalds } 20478e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 20481da177e4SLinus Torvalds return rc; 20491da177e4SLinus Torvalds } 20501da177e4SLinus Torvalds 20511da177e4SLinus Torvalds /* 20521da177e4SLinus Torvalds * Get attributes (cache operations) 20531da177e4SLinus Torvalds * Returnes the cache attributes used in Define Extend (DE). 20541da177e4SLinus Torvalds */ 20551da177e4SLinus Torvalds static int 20561107ccfbSChristoph Hellwig dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 20571da177e4SLinus Torvalds { 20581107ccfbSChristoph Hellwig struct dasd_eckd_private *private = 20591107ccfbSChristoph Hellwig (struct dasd_eckd_private *)device->private; 20601107ccfbSChristoph Hellwig struct attrib_data_t attrib = private->attrib; 20611da177e4SLinus Torvalds int rc; 20621da177e4SLinus Torvalds 20631da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 20641da177e4SLinus Torvalds return -EACCES; 20651107ccfbSChristoph Hellwig if (!argp) 20661da177e4SLinus Torvalds return -EINVAL; 20671da177e4SLinus Torvalds 20681107ccfbSChristoph Hellwig rc = 0; 20691107ccfbSChristoph Hellwig if (copy_to_user(argp, (long *) &attrib, 20701107ccfbSChristoph Hellwig sizeof(struct attrib_data_t))) 20711107ccfbSChristoph Hellwig rc = -EFAULT; 20721da177e4SLinus Torvalds 20731da177e4SLinus Torvalds return rc; 20741da177e4SLinus Torvalds } 20751da177e4SLinus Torvalds 20761da177e4SLinus Torvalds /* 20771da177e4SLinus Torvalds * Set attributes (cache operations) 20781da177e4SLinus Torvalds * Stores the attributes for cache operation to be used in Define Extend (DE). 20791da177e4SLinus Torvalds */ 20801da177e4SLinus Torvalds static int 20811107ccfbSChristoph Hellwig dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 20821da177e4SLinus Torvalds { 20831107ccfbSChristoph Hellwig struct dasd_eckd_private *private = 20841107ccfbSChristoph Hellwig (struct dasd_eckd_private *)device->private; 20851da177e4SLinus Torvalds struct attrib_data_t attrib; 20861da177e4SLinus Torvalds 20871da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 20881da177e4SLinus Torvalds return -EACCES; 20891107ccfbSChristoph Hellwig if (!argp) 20901da177e4SLinus Torvalds return -EINVAL; 20911da177e4SLinus Torvalds 20921107ccfbSChristoph Hellwig if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 20931da177e4SLinus Torvalds return -EFAULT; 20941da177e4SLinus Torvalds private->attrib = attrib; 20951da177e4SLinus Torvalds 20961da177e4SLinus Torvalds DEV_MESSAGE(KERN_INFO, device, 20971da177e4SLinus Torvalds "cache operation mode set to %x (%i cylinder prestage)", 20981da177e4SLinus Torvalds private->attrib.operation, private->attrib.nr_cyl); 20991da177e4SLinus Torvalds return 0; 21001da177e4SLinus Torvalds } 21011da177e4SLinus Torvalds 2102ab1d848fSNigel Hislop /* 2103ab1d848fSNigel Hislop * Issue syscall I/O to EMC Symmetrix array. 2104ab1d848fSNigel Hislop * CCWs are PSF and RSSD 2105ab1d848fSNigel Hislop */ 2106ab1d848fSNigel Hislop static int dasd_symm_io(struct dasd_device *device, void __user *argp) 2107ab1d848fSNigel Hislop { 2108ab1d848fSNigel Hislop struct dasd_symmio_parms usrparm; 2109ab1d848fSNigel Hislop char *psf_data, *rssd_result; 2110ab1d848fSNigel Hislop struct dasd_ccw_req *cqr; 2111ab1d848fSNigel Hislop struct ccw1 *ccw; 2112ab1d848fSNigel Hislop int rc; 2113ab1d848fSNigel Hislop 2114ab1d848fSNigel Hislop /* Copy parms from caller */ 2115ab1d848fSNigel Hislop rc = -EFAULT; 2116ab1d848fSNigel Hislop if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 2117ab1d848fSNigel Hislop goto out; 2118ab1d848fSNigel Hislop #ifndef CONFIG_64BIT 2119ab1d848fSNigel Hislop /* Make sure pointers are sane even on 31 bit. */ 2120ab1d848fSNigel Hislop if ((usrparm.psf_data >> 32) != 0 || (usrparm.rssd_result >> 32) != 0) { 2121ab1d848fSNigel Hislop rc = -EINVAL; 2122ab1d848fSNigel Hislop goto out; 2123ab1d848fSNigel Hislop } 2124ab1d848fSNigel Hislop #endif 2125ab1d848fSNigel Hislop /* alloc I/O data area */ 2126ab1d848fSNigel Hislop psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 2127ab1d848fSNigel Hislop rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 2128ab1d848fSNigel Hislop if (!psf_data || !rssd_result) { 2129ab1d848fSNigel Hislop rc = -ENOMEM; 2130ab1d848fSNigel Hislop goto out_free; 2131ab1d848fSNigel Hislop } 2132ab1d848fSNigel Hislop 2133ab1d848fSNigel Hislop /* get syscall header from user space */ 2134ab1d848fSNigel Hislop rc = -EFAULT; 2135ab1d848fSNigel Hislop if (copy_from_user(psf_data, 2136ab1d848fSNigel Hislop (void __user *)(unsigned long) usrparm.psf_data, 2137ab1d848fSNigel Hislop usrparm.psf_data_len)) 2138ab1d848fSNigel Hislop goto out_free; 2139ab1d848fSNigel Hislop 2140ab1d848fSNigel Hislop /* sanity check on syscall header */ 2141ab1d848fSNigel Hislop if (psf_data[0] != 0x17 && psf_data[1] != 0xce) { 2142ab1d848fSNigel Hislop rc = -EINVAL; 2143ab1d848fSNigel Hislop goto out_free; 2144ab1d848fSNigel Hislop } 2145ab1d848fSNigel Hislop 2146ab1d848fSNigel Hislop /* setup CCWs for PSF + RSSD */ 2147ab1d848fSNigel Hislop cqr = dasd_smalloc_request("ECKD", 2 , 0, device); 2148ab1d848fSNigel Hislop if (IS_ERR(cqr)) { 2149ab1d848fSNigel Hislop DEV_MESSAGE(KERN_WARNING, device, "%s", 2150ab1d848fSNigel Hislop "Could not allocate initialization request"); 2151ab1d848fSNigel Hislop rc = PTR_ERR(cqr); 2152ab1d848fSNigel Hislop goto out_free; 2153ab1d848fSNigel Hislop } 2154ab1d848fSNigel Hislop 2155ab1d848fSNigel Hislop cqr->startdev = device; 2156ab1d848fSNigel Hislop cqr->memdev = device; 2157ab1d848fSNigel Hislop cqr->retries = 3; 2158ab1d848fSNigel Hislop cqr->expires = 10 * HZ; 2159ab1d848fSNigel Hislop cqr->buildclk = get_clock(); 2160ab1d848fSNigel Hislop cqr->status = DASD_CQR_FILLED; 2161ab1d848fSNigel Hislop 2162ab1d848fSNigel Hislop /* Build the ccws */ 2163ab1d848fSNigel Hislop ccw = cqr->cpaddr; 2164ab1d848fSNigel Hislop 2165ab1d848fSNigel Hislop /* PSF ccw */ 2166ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_PSF; 2167ab1d848fSNigel Hislop ccw->count = usrparm.psf_data_len; 2168ab1d848fSNigel Hislop ccw->flags |= CCW_FLAG_CC; 2169ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) psf_data; 2170ab1d848fSNigel Hislop 2171ab1d848fSNigel Hislop ccw++; 2172ab1d848fSNigel Hislop 2173ab1d848fSNigel Hislop /* RSSD ccw */ 2174ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_RSSD; 2175ab1d848fSNigel Hislop ccw->count = usrparm.rssd_result_len; 2176ab1d848fSNigel Hislop ccw->flags = CCW_FLAG_SLI ; 2177ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) rssd_result; 2178ab1d848fSNigel Hislop 2179ab1d848fSNigel Hislop rc = dasd_sleep_on(cqr); 2180ab1d848fSNigel Hislop if (rc) 2181ab1d848fSNigel Hislop goto out_sfree; 2182ab1d848fSNigel Hislop 2183ab1d848fSNigel Hislop rc = -EFAULT; 2184ab1d848fSNigel Hislop if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 2185ab1d848fSNigel Hislop rssd_result, usrparm.rssd_result_len)) 2186ab1d848fSNigel Hislop goto out_sfree; 2187ab1d848fSNigel Hislop rc = 0; 2188ab1d848fSNigel Hislop 2189ab1d848fSNigel Hislop out_sfree: 2190ab1d848fSNigel Hislop dasd_sfree_request(cqr, cqr->memdev); 2191ab1d848fSNigel Hislop out_free: 2192ab1d848fSNigel Hislop kfree(rssd_result); 2193ab1d848fSNigel Hislop kfree(psf_data); 2194ab1d848fSNigel Hislop out: 2195ab1d848fSNigel Hislop DBF_DEV_EVENT(DBF_WARNING, device, "Symmetrix ioctl: rc=%d", rc); 2196ab1d848fSNigel Hislop return rc; 2197ab1d848fSNigel Hislop } 2198ab1d848fSNigel Hislop 21991107ccfbSChristoph Hellwig static int 22008e09f215SStefan Weinhuber dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 22011107ccfbSChristoph Hellwig { 22028e09f215SStefan Weinhuber struct dasd_device *device = block->base; 22038e09f215SStefan Weinhuber 22041107ccfbSChristoph Hellwig switch (cmd) { 22051107ccfbSChristoph Hellwig case BIODASDGATTR: 22061107ccfbSChristoph Hellwig return dasd_eckd_get_attrib(device, argp); 22071107ccfbSChristoph Hellwig case BIODASDSATTR: 22081107ccfbSChristoph Hellwig return dasd_eckd_set_attrib(device, argp); 22091107ccfbSChristoph Hellwig case BIODASDPSRD: 22101107ccfbSChristoph Hellwig return dasd_eckd_performance(device, argp); 22111107ccfbSChristoph Hellwig case BIODASDRLSE: 22121107ccfbSChristoph Hellwig return dasd_eckd_release(device); 22131107ccfbSChristoph Hellwig case BIODASDRSRV: 22141107ccfbSChristoph Hellwig return dasd_eckd_reserve(device); 22151107ccfbSChristoph Hellwig case BIODASDSLCK: 22161107ccfbSChristoph Hellwig return dasd_eckd_steal_lock(device); 2217ab1d848fSNigel Hislop case BIODASDSYMMIO: 2218ab1d848fSNigel Hislop return dasd_symm_io(device, argp); 22191107ccfbSChristoph Hellwig default: 22201107ccfbSChristoph Hellwig return -ENOIOCTLCMD; 22211107ccfbSChristoph Hellwig } 22221107ccfbSChristoph Hellwig } 22231107ccfbSChristoph Hellwig 22241da177e4SLinus Torvalds /* 2225445b5b49SHorst Hummel * Dump the range of CCWs into 'page' buffer 2226445b5b49SHorst Hummel * and return number of printed chars. 2227445b5b49SHorst Hummel */ 22284d284cacSHeiko Carstens static int 2229445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 2230445b5b49SHorst Hummel { 2231445b5b49SHorst Hummel int len, count; 2232445b5b49SHorst Hummel char *datap; 2233445b5b49SHorst Hummel 2234445b5b49SHorst Hummel len = 0; 2235445b5b49SHorst Hummel while (from <= to) { 2236445b5b49SHorst Hummel len += sprintf(page + len, KERN_ERR PRINTK_HEADER 2237445b5b49SHorst Hummel " CCW %p: %08X %08X DAT:", 2238445b5b49SHorst Hummel from, ((int *) from)[0], ((int *) from)[1]); 2239445b5b49SHorst Hummel 2240445b5b49SHorst Hummel /* get pointer to data (consider IDALs) */ 2241445b5b49SHorst Hummel if (from->flags & CCW_FLAG_IDA) 2242445b5b49SHorst Hummel datap = (char *) *((addr_t *) (addr_t) from->cda); 2243445b5b49SHorst Hummel else 2244445b5b49SHorst Hummel datap = (char *) ((addr_t) from->cda); 2245445b5b49SHorst Hummel 2246445b5b49SHorst Hummel /* dump data (max 32 bytes) */ 2247445b5b49SHorst Hummel for (count = 0; count < from->count && count < 32; count++) { 2248445b5b49SHorst Hummel if (count % 8 == 0) len += sprintf(page + len, " "); 2249445b5b49SHorst Hummel if (count % 4 == 0) len += sprintf(page + len, " "); 2250445b5b49SHorst Hummel len += sprintf(page + len, "%02x", datap[count]); 2251445b5b49SHorst Hummel } 2252445b5b49SHorst Hummel len += sprintf(page + len, "\n"); 2253445b5b49SHorst Hummel from++; 2254445b5b49SHorst Hummel } 2255445b5b49SHorst Hummel return len; 2256445b5b49SHorst Hummel } 2257445b5b49SHorst Hummel 2258445b5b49SHorst Hummel /* 22591da177e4SLinus Torvalds * Print sense data and related channel program. 22601da177e4SLinus Torvalds * Parts are printed because printk buffer is only 1024 bytes. 22611da177e4SLinus Torvalds */ 22628e09f215SStefan Weinhuber static void dasd_eckd_dump_sense(struct dasd_device *device, 22638e09f215SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 22641da177e4SLinus Torvalds { 22651da177e4SLinus Torvalds char *page; 2266445b5b49SHorst Hummel struct ccw1 *first, *last, *fail, *from, *to; 2267445b5b49SHorst Hummel int len, sl, sct; 22681da177e4SLinus Torvalds 22691da177e4SLinus Torvalds page = (char *) get_zeroed_page(GFP_ATOMIC); 22701da177e4SLinus Torvalds if (page == NULL) { 22711da177e4SLinus Torvalds DEV_MESSAGE(KERN_ERR, device, " %s", 22721da177e4SLinus Torvalds "No memory to dump sense data"); 22731da177e4SLinus Torvalds return; 22741da177e4SLinus Torvalds } 2275445b5b49SHorst Hummel /* dump the sense data */ 22761da177e4SLinus Torvalds len = sprintf(page, KERN_ERR PRINTK_HEADER 22771da177e4SLinus Torvalds " I/O status report for device %s:\n", 22782a0217d5SKay Sievers dev_name(&device->cdev->dev)); 22791da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 22801da177e4SLinus Torvalds " in req: %p CS: 0x%02X DS: 0x%02X\n", req, 228123d805b6SPeter Oberparleiter irb->scsw.cmd.cstat, irb->scsw.cmd.dstat); 22821da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 22831da177e4SLinus Torvalds " device %s: Failing CCW: %p\n", 22842a0217d5SKay Sievers dev_name(&device->cdev->dev), 228523d805b6SPeter Oberparleiter (void *) (addr_t) irb->scsw.cmd.cpa); 22861da177e4SLinus Torvalds if (irb->esw.esw0.erw.cons) { 22871da177e4SLinus Torvalds for (sl = 0; sl < 4; sl++) { 22881da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 22891da177e4SLinus Torvalds " Sense(hex) %2d-%2d:", 22901da177e4SLinus Torvalds (8 * sl), ((8 * sl) + 7)); 22911da177e4SLinus Torvalds 22921da177e4SLinus Torvalds for (sct = 0; sct < 8; sct++) { 22931da177e4SLinus Torvalds len += sprintf(page + len, " %02x", 22941da177e4SLinus Torvalds irb->ecw[8 * sl + sct]); 22951da177e4SLinus Torvalds } 22961da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 22971da177e4SLinus Torvalds } 22981da177e4SLinus Torvalds 22991da177e4SLinus Torvalds if (irb->ecw[27] & DASD_SENSE_BIT_0) { 23001da177e4SLinus Torvalds /* 24 Byte Sense Data */ 2301445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 23021da177e4SLinus Torvalds " 24 Byte: %x MSG %x, " 23031da177e4SLinus Torvalds "%s MSGb to SYSOP\n", 23041da177e4SLinus Torvalds irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 23051da177e4SLinus Torvalds irb->ecw[1] & 0x10 ? "" : "no"); 23061da177e4SLinus Torvalds } else { 23071da177e4SLinus Torvalds /* 32 Byte Sense Data */ 2308445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 23091da177e4SLinus Torvalds " 32 Byte: Format: %x " 23101da177e4SLinus Torvalds "Exception class %x\n", 23111da177e4SLinus Torvalds irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 23121da177e4SLinus Torvalds } 23131da177e4SLinus Torvalds } else { 2314445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 23151da177e4SLinus Torvalds " SORRY - NO VALID SENSE AVAILABLE\n"); 23161da177e4SLinus Torvalds } 2317445b5b49SHorst Hummel printk("%s", page); 23181da177e4SLinus Torvalds 23198e09f215SStefan Weinhuber if (req) { 23208e09f215SStefan Weinhuber /* req == NULL for unsolicited interrupts */ 2321445b5b49SHorst Hummel /* dump the Channel Program (max 140 Bytes per line) */ 2322445b5b49SHorst Hummel /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 2323445b5b49SHorst Hummel first = req->cpaddr; 2324445b5b49SHorst Hummel for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 2325445b5b49SHorst Hummel to = min(first + 6, last); 23261da177e4SLinus Torvalds len = sprintf(page, KERN_ERR PRINTK_HEADER 23271da177e4SLinus Torvalds " Related CP in req: %p\n", req); 2328445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(first, to, page + len); 2329445b5b49SHorst Hummel printk("%s", page); 23301da177e4SLinus Torvalds 2331445b5b49SHorst Hummel /* print failing CCW area (maximum 4) */ 2332445b5b49SHorst Hummel /* scsw->cda is either valid or zero */ 23331da177e4SLinus Torvalds len = 0; 2334445b5b49SHorst Hummel from = ++to; 233523d805b6SPeter Oberparleiter fail = (struct ccw1 *)(addr_t) 233623d805b6SPeter Oberparleiter irb->scsw.cmd.cpa; /* failing CCW */ 2337445b5b49SHorst Hummel if (from < fail - 2) { 2338445b5b49SHorst Hummel from = fail - 2; /* there is a gap - print header */ 2339445b5b49SHorst Hummel len += sprintf(page, KERN_ERR PRINTK_HEADER "......\n"); 23401da177e4SLinus Torvalds } 2341445b5b49SHorst Hummel to = min(fail + 1, last); 2342445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, to, page + len); 23431da177e4SLinus Torvalds 2344445b5b49SHorst Hummel /* print last CCWs (maximum 2) */ 2345445b5b49SHorst Hummel from = max(from, ++to); 2346445b5b49SHorst Hummel if (from < last - 1) { 2347445b5b49SHorst Hummel from = last - 1; /* there is a gap - print header */ 23481da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n"); 23491da177e4SLinus Torvalds } 2350445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, last, page + len); 23511da177e4SLinus Torvalds if (len > 0) 2352445b5b49SHorst Hummel printk("%s", page); 23538e09f215SStefan Weinhuber } 23541da177e4SLinus Torvalds free_page((unsigned long) page); 23551da177e4SLinus Torvalds } 23561da177e4SLinus Torvalds 23571da177e4SLinus Torvalds /* 23581da177e4SLinus Torvalds * max_blocks is dependent on the amount of storage that is available 23591da177e4SLinus Torvalds * in the static io buffer for each device. Currently each device has 23601da177e4SLinus Torvalds * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has 23611da177e4SLinus Torvalds * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use 23621da177e4SLinus Torvalds * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In 23631da177e4SLinus Torvalds * addition we have one define extent ccw + 16 bytes of data and one 23641da177e4SLinus Torvalds * locate record ccw + 16 bytes of data. That makes: 23651da177e4SLinus Torvalds * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. 23661da177e4SLinus Torvalds * We want to fit two into the available memory so that we can immediately 23671da177e4SLinus Torvalds * start the next request if one finishes off. That makes 249.5 blocks 23681da177e4SLinus Torvalds * for one request. Give a little safety and the result is 240. 23691da177e4SLinus Torvalds */ 23701da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline = { 23711da177e4SLinus Torvalds .owner = THIS_MODULE, 23721da177e4SLinus Torvalds .name = "ECKD", 23731da177e4SLinus Torvalds .ebcname = "ECKD", 23741da177e4SLinus Torvalds .max_blocks = 240, 23751da177e4SLinus Torvalds .check_device = dasd_eckd_check_characteristics, 23768e09f215SStefan Weinhuber .uncheck_device = dasd_eckd_uncheck_device, 23771da177e4SLinus Torvalds .do_analysis = dasd_eckd_do_analysis, 23788e09f215SStefan Weinhuber .ready_to_online = dasd_eckd_ready_to_online, 23798e09f215SStefan Weinhuber .online_to_ready = dasd_eckd_online_to_ready, 23801da177e4SLinus Torvalds .fill_geometry = dasd_eckd_fill_geometry, 23811da177e4SLinus Torvalds .start_IO = dasd_start_IO, 23821da177e4SLinus Torvalds .term_IO = dasd_term_IO, 23838e09f215SStefan Weinhuber .handle_terminated_request = dasd_eckd_handle_terminated_request, 23841da177e4SLinus Torvalds .format_device = dasd_eckd_format_device, 23851da177e4SLinus Torvalds .erp_action = dasd_eckd_erp_action, 23861da177e4SLinus Torvalds .erp_postaction = dasd_eckd_erp_postaction, 23878e09f215SStefan Weinhuber .handle_unsolicited_interrupt = dasd_eckd_handle_unsolicited_interrupt, 23888e09f215SStefan Weinhuber .build_cp = dasd_eckd_build_alias_cp, 23898e09f215SStefan Weinhuber .free_cp = dasd_eckd_free_alias_cp, 23901da177e4SLinus Torvalds .dump_sense = dasd_eckd_dump_sense, 23911da177e4SLinus Torvalds .fill_info = dasd_eckd_fill_info, 23921107ccfbSChristoph Hellwig .ioctl = dasd_eckd_ioctl, 23931da177e4SLinus Torvalds }; 23941da177e4SLinus Torvalds 23951da177e4SLinus Torvalds static int __init 23961da177e4SLinus Torvalds dasd_eckd_init(void) 23971da177e4SLinus Torvalds { 23981da177e4SLinus Torvalds ASCEBC(dasd_eckd_discipline.ebcname, 4); 239940545573SHorst Hummel return ccw_driver_register(&dasd_eckd_driver); 24001da177e4SLinus Torvalds } 24011da177e4SLinus Torvalds 24021da177e4SLinus Torvalds static void __exit 24031da177e4SLinus Torvalds dasd_eckd_cleanup(void) 24041da177e4SLinus Torvalds { 24051da177e4SLinus Torvalds ccw_driver_unregister(&dasd_eckd_driver); 24061da177e4SLinus Torvalds } 24071da177e4SLinus Torvalds 24081da177e4SLinus Torvalds module_init(dasd_eckd_init); 24091da177e4SLinus Torvalds module_exit(dasd_eckd_cleanup); 2410