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 162b44b0ab3SStefan Weinhuber static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head) 163b44b0ab3SStefan Weinhuber { 164b44b0ab3SStefan Weinhuber geo->cyl = (__u16) cyl; 165b44b0ab3SStefan Weinhuber geo->head = cyl >> 16; 166b44b0ab3SStefan Weinhuber geo->head <<= 4; 167b44b0ab3SStefan Weinhuber geo->head |= head; 168b44b0ab3SStefan Weinhuber } 169b44b0ab3SStefan Weinhuber 1704d284cacSHeiko Carstens static int 1711da177e4SLinus Torvalds check_XRC (struct ccw1 *de_ccw, 1721da177e4SLinus Torvalds struct DE_eckd_data *data, 1731da177e4SLinus Torvalds struct dasd_device *device) 1741da177e4SLinus Torvalds { 1751da177e4SLinus Torvalds struct dasd_eckd_private *private; 176d54853efSMartin Schwidefsky int rc; 1771da177e4SLinus Torvalds 1781da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 179d54853efSMartin Schwidefsky if (!private->rdc_data.facilities.XRC_supported) 180d54853efSMartin Schwidefsky return 0; 1811da177e4SLinus Torvalds 1821da177e4SLinus Torvalds /* switch on System Time Stamp - needed for XRC Support */ 1831da177e4SLinus Torvalds data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ 1841da177e4SLinus Torvalds data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ 1851da177e4SLinus Torvalds 186d54853efSMartin Schwidefsky rc = get_sync_clock(&data->ep_sys_time); 187d54853efSMartin Schwidefsky /* Ignore return code if sync clock is switched off. */ 188d54853efSMartin Schwidefsky if (rc == -ENOSYS || rc == -EACCES) 189d54853efSMartin Schwidefsky rc = 0; 1901da177e4SLinus Torvalds 1911da177e4SLinus Torvalds de_ccw->count = sizeof(struct DE_eckd_data); 1921da177e4SLinus Torvalds de_ccw->flags |= CCW_FLAG_SLI; 193d54853efSMartin Schwidefsky return rc; 1941da177e4SLinus Torvalds } 1951da177e4SLinus Torvalds 1964d284cacSHeiko Carstens static int 197b44b0ab3SStefan Weinhuber define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk, 198b44b0ab3SStefan Weinhuber unsigned int totrk, int cmd, struct dasd_device *device) 1991da177e4SLinus Torvalds { 2001da177e4SLinus Torvalds struct dasd_eckd_private *private; 201b44b0ab3SStefan Weinhuber u32 begcyl, endcyl; 202b44b0ab3SStefan Weinhuber u16 heads, beghead, endhead; 203d54853efSMartin Schwidefsky int rc = 0; 2041da177e4SLinus Torvalds 2051da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 2061da177e4SLinus Torvalds 2071da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; 2081da177e4SLinus Torvalds ccw->flags = 0; 2091da177e4SLinus Torvalds ccw->count = 16; 2101da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 2111da177e4SLinus Torvalds 2121da177e4SLinus Torvalds memset(data, 0, sizeof(struct DE_eckd_data)); 2131da177e4SLinus Torvalds switch (cmd) { 2141da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 2151da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 2161da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 2171da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 2181da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 2191da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 2201da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 2211da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 2221da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_COUNT: 2231da177e4SLinus Torvalds data->mask.perm = 0x1; 2241da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 2251da177e4SLinus Torvalds break; 2261da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 2271da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 2281da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 2291da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 2301da177e4SLinus Torvalds data->mask.perm = 0x02; 2311da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 232d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2331da177e4SLinus Torvalds break; 2341da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 2351da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 2361da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 237d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2381da177e4SLinus Torvalds break; 2391da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 2401da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 2411da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 2421da177e4SLinus Torvalds data->mask.perm = 0x3; 2431da177e4SLinus Torvalds data->mask.auth = 0x1; 2441da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 245d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2461da177e4SLinus Torvalds break; 2471da177e4SLinus Torvalds default: 2481da177e4SLinus Torvalds DEV_MESSAGE(KERN_ERR, device, "unknown opcode 0x%x", cmd); 2491da177e4SLinus Torvalds break; 2501da177e4SLinus Torvalds } 2511da177e4SLinus Torvalds 2521da177e4SLinus Torvalds data->attributes.mode = 0x3; /* ECKD */ 2531da177e4SLinus Torvalds 2541da177e4SLinus Torvalds if ((private->rdc_data.cu_type == 0x2105 || 2551da177e4SLinus Torvalds private->rdc_data.cu_type == 0x2107 || 2561da177e4SLinus Torvalds private->rdc_data.cu_type == 0x1750) 2571da177e4SLinus Torvalds && !(private->uses_cdl && trk < 2)) 2581da177e4SLinus Torvalds data->ga_extended |= 0x40; /* Regular Data Format Mode */ 2591da177e4SLinus Torvalds 260b44b0ab3SStefan Weinhuber heads = private->rdc_data.trk_per_cyl; 261b44b0ab3SStefan Weinhuber begcyl = trk / heads; 262b44b0ab3SStefan Weinhuber beghead = trk % heads; 263b44b0ab3SStefan Weinhuber endcyl = totrk / heads; 264b44b0ab3SStefan Weinhuber endhead = totrk % heads; 2651da177e4SLinus Torvalds 2661da177e4SLinus Torvalds /* check for sequential prestage - enhance cylinder range */ 2671da177e4SLinus Torvalds if (data->attributes.operation == DASD_SEQ_PRESTAGE || 2681da177e4SLinus Torvalds data->attributes.operation == DASD_SEQ_ACCESS) { 2691da177e4SLinus Torvalds 270b44b0ab3SStefan Weinhuber if (endcyl + private->attrib.nr_cyl < private->real_cyl) 271b44b0ab3SStefan Weinhuber endcyl += private->attrib.nr_cyl; 2721da177e4SLinus Torvalds else 273b44b0ab3SStefan Weinhuber endcyl = (private->real_cyl - 1); 2741da177e4SLinus Torvalds } 2751da177e4SLinus Torvalds 276b44b0ab3SStefan Weinhuber set_ch_t(&data->beg_ext, begcyl, beghead); 277b44b0ab3SStefan Weinhuber set_ch_t(&data->end_ext, endcyl, endhead); 278d54853efSMartin Schwidefsky return rc; 2791da177e4SLinus Torvalds } 2801da177e4SLinus Torvalds 2818e09f215SStefan Weinhuber static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata, 2828e09f215SStefan Weinhuber struct dasd_device *device) 2838e09f215SStefan Weinhuber { 2848e09f215SStefan Weinhuber struct dasd_eckd_private *private; 2858e09f215SStefan Weinhuber int rc; 2868e09f215SStefan Weinhuber 2878e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 2888e09f215SStefan Weinhuber if (!private->rdc_data.facilities.XRC_supported) 2898e09f215SStefan Weinhuber return 0; 2908e09f215SStefan Weinhuber 2918e09f215SStefan Weinhuber /* switch on System Time Stamp - needed for XRC Support */ 2928e09f215SStefan Weinhuber pfxdata->define_extend.ga_extended |= 0x08; /* 'Time Stamp Valid' */ 2938e09f215SStefan Weinhuber pfxdata->define_extend.ga_extended |= 0x02; /* 'Extended Parameter' */ 2948e09f215SStefan Weinhuber pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */ 2958e09f215SStefan Weinhuber 2968e09f215SStefan Weinhuber rc = get_sync_clock(&pfxdata->define_extend.ep_sys_time); 2978e09f215SStefan Weinhuber /* Ignore return code if sync clock is switched off. */ 2988e09f215SStefan Weinhuber if (rc == -ENOSYS || rc == -EACCES) 2998e09f215SStefan Weinhuber rc = 0; 3008e09f215SStefan Weinhuber return rc; 3018e09f215SStefan Weinhuber } 3028e09f215SStefan Weinhuber 303b44b0ab3SStefan Weinhuber static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 304b44b0ab3SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 305b44b0ab3SStefan Weinhuber struct dasd_device *basedev, struct dasd_device *startdev) 3068e09f215SStefan Weinhuber { 3078e09f215SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 3088e09f215SStefan Weinhuber struct DE_eckd_data *data; 309b44b0ab3SStefan Weinhuber u32 begcyl, endcyl; 310b44b0ab3SStefan Weinhuber u16 heads, beghead, endhead; 3118e09f215SStefan Weinhuber int rc = 0; 3128e09f215SStefan Weinhuber 3138e09f215SStefan Weinhuber basepriv = (struct dasd_eckd_private *) basedev->private; 3148e09f215SStefan Weinhuber startpriv = (struct dasd_eckd_private *) startdev->private; 3158e09f215SStefan Weinhuber data = &pfxdata->define_extend; 3168e09f215SStefan Weinhuber 3178e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PFX; 3188e09f215SStefan Weinhuber ccw->flags = 0; 3198e09f215SStefan Weinhuber ccw->count = sizeof(*pfxdata); 3208e09f215SStefan Weinhuber ccw->cda = (__u32) __pa(pfxdata); 3218e09f215SStefan Weinhuber 3228e09f215SStefan Weinhuber memset(pfxdata, 0, sizeof(*pfxdata)); 3238e09f215SStefan Weinhuber /* prefix data */ 3248e09f215SStefan Weinhuber pfxdata->format = 0; 3254abb08c2SStefan Weinhuber pfxdata->base_address = basepriv->ned->unit_addr; 3264abb08c2SStefan Weinhuber pfxdata->base_lss = basepriv->ned->ID; 3278e09f215SStefan Weinhuber pfxdata->validity.define_extend = 1; 3288e09f215SStefan Weinhuber 3298e09f215SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 3308e09f215SStefan Weinhuber if (startpriv->uid.type != UA_BASE_DEVICE) { 3318e09f215SStefan Weinhuber pfxdata->validity.verify_base = 1; 3328e09f215SStefan Weinhuber if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 3338e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 1; 3348e09f215SStefan Weinhuber } 3358e09f215SStefan Weinhuber 3368e09f215SStefan Weinhuber /* define extend data (mostly)*/ 3378e09f215SStefan Weinhuber switch (cmd) { 3388e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_HOME_ADDRESS: 3398e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_RECORD_ZERO: 3408e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ: 3418e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_MT: 3428e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD: 3438e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD_MT: 3448e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_KD: 3458e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_KD_MT: 3468e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_COUNT: 3478e09f215SStefan Weinhuber data->mask.perm = 0x1; 3488e09f215SStefan Weinhuber data->attributes.operation = basepriv->attrib.operation; 3498e09f215SStefan Weinhuber break; 3508e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE: 3518e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_MT: 3528e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD: 3538e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD_MT: 3548e09f215SStefan Weinhuber data->mask.perm = 0x02; 3558e09f215SStefan Weinhuber data->attributes.operation = basepriv->attrib.operation; 3568e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 3578e09f215SStefan Weinhuber break; 3588e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD: 3598e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD_MT: 3608e09f215SStefan Weinhuber data->attributes.operation = DASD_BYPASS_CACHE; 3618e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 3628e09f215SStefan Weinhuber break; 3638e09f215SStefan Weinhuber case DASD_ECKD_CCW_ERASE: 3648e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 3658e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 3668e09f215SStefan Weinhuber data->mask.perm = 0x3; 3678e09f215SStefan Weinhuber data->mask.auth = 0x1; 3688e09f215SStefan Weinhuber data->attributes.operation = DASD_BYPASS_CACHE; 3698e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 3708e09f215SStefan Weinhuber break; 3718e09f215SStefan Weinhuber default: 3728e09f215SStefan Weinhuber DEV_MESSAGE(KERN_ERR, basedev, "unknown opcode 0x%x", cmd); 3738e09f215SStefan Weinhuber break; 3748e09f215SStefan Weinhuber } 3758e09f215SStefan Weinhuber 3768e09f215SStefan Weinhuber data->attributes.mode = 0x3; /* ECKD */ 3778e09f215SStefan Weinhuber 3788e09f215SStefan Weinhuber if ((basepriv->rdc_data.cu_type == 0x2105 || 3798e09f215SStefan Weinhuber basepriv->rdc_data.cu_type == 0x2107 || 3808e09f215SStefan Weinhuber basepriv->rdc_data.cu_type == 0x1750) 3818e09f215SStefan Weinhuber && !(basepriv->uses_cdl && trk < 2)) 3828e09f215SStefan Weinhuber data->ga_extended |= 0x40; /* Regular Data Format Mode */ 3838e09f215SStefan Weinhuber 384b44b0ab3SStefan Weinhuber heads = basepriv->rdc_data.trk_per_cyl; 385b44b0ab3SStefan Weinhuber begcyl = trk / heads; 386b44b0ab3SStefan Weinhuber beghead = trk % heads; 387b44b0ab3SStefan Weinhuber endcyl = totrk / heads; 388b44b0ab3SStefan Weinhuber endhead = totrk % heads; 3898e09f215SStefan Weinhuber 3908e09f215SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 3918e09f215SStefan Weinhuber if (data->attributes.operation == DASD_SEQ_PRESTAGE || 3928e09f215SStefan Weinhuber data->attributes.operation == DASD_SEQ_ACCESS) { 3938e09f215SStefan Weinhuber 394b44b0ab3SStefan Weinhuber if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 395b44b0ab3SStefan Weinhuber endcyl += basepriv->attrib.nr_cyl; 3968e09f215SStefan Weinhuber else 397b44b0ab3SStefan Weinhuber endcyl = (basepriv->real_cyl - 1); 3988e09f215SStefan Weinhuber } 3998e09f215SStefan Weinhuber 400b44b0ab3SStefan Weinhuber set_ch_t(&data->beg_ext, begcyl, beghead); 401b44b0ab3SStefan Weinhuber set_ch_t(&data->end_ext, endcyl, endhead); 4028e09f215SStefan Weinhuber return rc; 4038e09f215SStefan Weinhuber } 4048e09f215SStefan Weinhuber 4054d284cacSHeiko Carstens static void 406b44b0ab3SStefan Weinhuber locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk, 407b44b0ab3SStefan Weinhuber unsigned int rec_on_trk, int no_rec, int cmd, 4081da177e4SLinus Torvalds struct dasd_device * device, int reclen) 4091da177e4SLinus Torvalds { 4101da177e4SLinus Torvalds struct dasd_eckd_private *private; 4111da177e4SLinus Torvalds int sector; 4121da177e4SLinus Torvalds int dn, d; 4131da177e4SLinus Torvalds 4141da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 4151da177e4SLinus Torvalds 4161da177e4SLinus Torvalds DBF_DEV_EVENT(DBF_INFO, device, 4171da177e4SLinus Torvalds "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", 4181da177e4SLinus Torvalds trk, rec_on_trk, no_rec, cmd, reclen); 4191da177e4SLinus Torvalds 4201da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; 4211da177e4SLinus Torvalds ccw->flags = 0; 4221da177e4SLinus Torvalds ccw->count = 16; 4231da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 4241da177e4SLinus Torvalds 4251da177e4SLinus Torvalds memset(data, 0, sizeof(struct LO_eckd_data)); 4261da177e4SLinus Torvalds sector = 0; 4271da177e4SLinus Torvalds if (rec_on_trk) { 4281da177e4SLinus Torvalds switch (private->rdc_data.dev_type) { 4291da177e4SLinus Torvalds case 0x3390: 4301da177e4SLinus Torvalds dn = ceil_quot(reclen + 6, 232); 4311da177e4SLinus Torvalds d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 4321da177e4SLinus Torvalds sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 4331da177e4SLinus Torvalds break; 4341da177e4SLinus Torvalds case 0x3380: 4351da177e4SLinus Torvalds d = 7 + ceil_quot(reclen + 12, 32); 4361da177e4SLinus Torvalds sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 4371da177e4SLinus Torvalds break; 4381da177e4SLinus Torvalds } 4391da177e4SLinus Torvalds } 4401da177e4SLinus Torvalds data->sector = sector; 4411da177e4SLinus Torvalds data->count = no_rec; 4421da177e4SLinus Torvalds switch (cmd) { 4431da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 4441da177e4SLinus Torvalds data->operation.orientation = 0x3; 4451da177e4SLinus Torvalds data->operation.operation = 0x03; 4461da177e4SLinus Torvalds break; 4471da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 4481da177e4SLinus Torvalds data->operation.orientation = 0x3; 4491da177e4SLinus Torvalds data->operation.operation = 0x16; 4501da177e4SLinus Torvalds break; 4511da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 4521da177e4SLinus Torvalds data->operation.orientation = 0x1; 4531da177e4SLinus Torvalds data->operation.operation = 0x03; 4541da177e4SLinus Torvalds data->count++; 4551da177e4SLinus Torvalds break; 4561da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 4571da177e4SLinus Torvalds data->operation.orientation = 0x3; 4581da177e4SLinus Torvalds data->operation.operation = 0x16; 4591da177e4SLinus Torvalds data->count++; 4601da177e4SLinus Torvalds break; 4611da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 4621da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 4631da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 4641da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 4651da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 4661da177e4SLinus Torvalds data->length = reclen; 4671da177e4SLinus Torvalds data->operation.operation = 0x01; 4681da177e4SLinus Torvalds break; 4691da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 4701da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 4711da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 4721da177e4SLinus Torvalds data->length = reclen; 4731da177e4SLinus Torvalds data->operation.operation = 0x03; 4741da177e4SLinus Torvalds break; 4751da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 4761da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 4771da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 4781da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 4791da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 4801da177e4SLinus Torvalds data->length = reclen; 4811da177e4SLinus Torvalds data->operation.operation = 0x06; 4821da177e4SLinus Torvalds break; 4831da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 4841da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 4851da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 4861da177e4SLinus Torvalds data->length = reclen; 4871da177e4SLinus Torvalds data->operation.operation = 0x16; 4881da177e4SLinus Torvalds break; 4891da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_COUNT: 4901da177e4SLinus Torvalds data->operation.operation = 0x06; 4911da177e4SLinus Torvalds break; 4921da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 4931da177e4SLinus Torvalds data->length = reclen; 4941da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 4951da177e4SLinus Torvalds data->operation.operation = 0x0b; 4961da177e4SLinus Torvalds break; 4971da177e4SLinus Torvalds default: 4981da177e4SLinus Torvalds DEV_MESSAGE(KERN_ERR, device, "unknown opcode 0x%x", cmd); 4991da177e4SLinus Torvalds } 500b44b0ab3SStefan Weinhuber set_ch_t(&data->seek_addr, 501b44b0ab3SStefan Weinhuber trk / private->rdc_data.trk_per_cyl, 502b44b0ab3SStefan Weinhuber trk % private->rdc_data.trk_per_cyl); 503b44b0ab3SStefan Weinhuber data->search_arg.cyl = data->seek_addr.cyl; 504b44b0ab3SStefan Weinhuber data->search_arg.head = data->seek_addr.head; 5051da177e4SLinus Torvalds data->search_arg.record = rec_on_trk; 5061da177e4SLinus Torvalds } 5071da177e4SLinus Torvalds 5081da177e4SLinus Torvalds /* 5091da177e4SLinus Torvalds * Returns 1 if the block is one of the special blocks that needs 5101da177e4SLinus Torvalds * to get read/written with the KD variant of the command. 5111da177e4SLinus Torvalds * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and 5121da177e4SLinus Torvalds * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. 5131da177e4SLinus Torvalds * Luckily the KD variants differ only by one bit (0x08) from the 5141da177e4SLinus Torvalds * normal variant. So don't wonder about code like: 5151da177e4SLinus Torvalds * if (dasd_eckd_cdl_special(blk_per_trk, recid)) 5161da177e4SLinus Torvalds * ccw->cmd_code |= 0x8; 5171da177e4SLinus Torvalds */ 5181da177e4SLinus Torvalds static inline int 5191da177e4SLinus Torvalds dasd_eckd_cdl_special(int blk_per_trk, int recid) 5201da177e4SLinus Torvalds { 5211da177e4SLinus Torvalds if (recid < 3) 5221da177e4SLinus Torvalds return 1; 5231da177e4SLinus Torvalds if (recid < blk_per_trk) 5241da177e4SLinus Torvalds return 0; 5251da177e4SLinus Torvalds if (recid < 2 * blk_per_trk) 5261da177e4SLinus Torvalds return 1; 5271da177e4SLinus Torvalds return 0; 5281da177e4SLinus Torvalds } 5291da177e4SLinus Torvalds 5301da177e4SLinus Torvalds /* 5311da177e4SLinus Torvalds * Returns the record size for the special blocks of the cdl format. 5321da177e4SLinus Torvalds * Only returns something useful if dasd_eckd_cdl_special is true 5331da177e4SLinus Torvalds * for the recid. 5341da177e4SLinus Torvalds */ 5351da177e4SLinus Torvalds static inline int 5361da177e4SLinus Torvalds dasd_eckd_cdl_reclen(int recid) 5371da177e4SLinus Torvalds { 5381da177e4SLinus Torvalds if (recid < 3) 5391da177e4SLinus Torvalds return sizes_trk0[recid]; 5401da177e4SLinus Torvalds return LABEL_SIZE; 5411da177e4SLinus Torvalds } 5421da177e4SLinus Torvalds 5433d052595SHorst Hummel /* 5443d052595SHorst Hummel * Generate device unique id that specifies the physical device. 5453d052595SHorst Hummel */ 5464abb08c2SStefan Weinhuber static int dasd_eckd_generate_uid(struct dasd_device *device, 5474abb08c2SStefan Weinhuber struct dasd_uid *uid) 5483d052595SHorst Hummel { 5493d052595SHorst Hummel struct dasd_eckd_private *private; 5504abb08c2SStefan Weinhuber int count; 5513d052595SHorst Hummel 5523d052595SHorst Hummel private = (struct dasd_eckd_private *) device->private; 5533d052595SHorst Hummel if (!private) 5543d052595SHorst Hummel return -ENODEV; 5554abb08c2SStefan Weinhuber if (!private->ned || !private->gneq) 5563d052595SHorst Hummel return -ENODEV; 5573d052595SHorst Hummel 5583d052595SHorst Hummel memset(uid, 0, sizeof(struct dasd_uid)); 5594abb08c2SStefan Weinhuber memcpy(uid->vendor, private->ned->HDA_manufacturer, 5603d052595SHorst Hummel sizeof(uid->vendor) - 1); 5613d052595SHorst Hummel EBCASC(uid->vendor, sizeof(uid->vendor) - 1); 5624abb08c2SStefan Weinhuber memcpy(uid->serial, private->ned->HDA_location, 5633d052595SHorst Hummel sizeof(uid->serial) - 1); 5643d052595SHorst Hummel EBCASC(uid->serial, sizeof(uid->serial) - 1); 5654abb08c2SStefan Weinhuber uid->ssid = private->gneq->subsystemID; 5664abb08c2SStefan Weinhuber uid->real_unit_addr = private->ned->unit_addr;; 5674abb08c2SStefan Weinhuber if (private->sneq) { 5684abb08c2SStefan Weinhuber uid->type = private->sneq->sua_flags; 5698e09f215SStefan Weinhuber if (uid->type == UA_BASE_PAV_ALIAS) 5704abb08c2SStefan Weinhuber uid->base_unit_addr = private->sneq->base_unit_addr; 5718e09f215SStefan Weinhuber } else { 5728e09f215SStefan Weinhuber uid->type = UA_BASE_DEVICE; 5738e09f215SStefan Weinhuber } 5744abb08c2SStefan Weinhuber if (private->vdsneq) { 5754abb08c2SStefan Weinhuber for (count = 0; count < 16; count++) { 5764abb08c2SStefan Weinhuber sprintf(uid->vduit+2*count, "%02x", 5774abb08c2SStefan Weinhuber private->vdsneq->uit[count]); 5784abb08c2SStefan Weinhuber } 5794abb08c2SStefan Weinhuber } 5803d052595SHorst Hummel return 0; 5813d052595SHorst Hummel } 5823d052595SHorst Hummel 583763968e2SHeiko Carstens static struct dasd_ccw_req *dasd_eckd_build_rcd_lpm(struct dasd_device *device, 58417283b56SCornelia Huck void *rcd_buffer, 58517283b56SCornelia Huck struct ciw *ciw, __u8 lpm) 58617283b56SCornelia Huck { 58717283b56SCornelia Huck struct dasd_ccw_req *cqr; 58817283b56SCornelia Huck struct ccw1 *ccw; 58917283b56SCornelia Huck 59017283b56SCornelia Huck cqr = dasd_smalloc_request("ECKD", 1 /* RCD */, ciw->count, device); 59117283b56SCornelia Huck 59217283b56SCornelia Huck if (IS_ERR(cqr)) { 59317283b56SCornelia Huck DEV_MESSAGE(KERN_WARNING, device, "%s", 59417283b56SCornelia Huck "Could not allocate RCD request"); 59517283b56SCornelia Huck return cqr; 59617283b56SCornelia Huck } 59717283b56SCornelia Huck 59817283b56SCornelia Huck ccw = cqr->cpaddr; 59917283b56SCornelia Huck ccw->cmd_code = ciw->cmd; 60017283b56SCornelia Huck ccw->cda = (__u32)(addr_t)rcd_buffer; 60117283b56SCornelia Huck ccw->count = ciw->count; 60217283b56SCornelia Huck 6038e09f215SStefan Weinhuber cqr->startdev = device; 6048e09f215SStefan Weinhuber cqr->memdev = device; 6058e09f215SStefan Weinhuber cqr->block = NULL; 60617283b56SCornelia Huck cqr->expires = 10*HZ; 60717283b56SCornelia Huck cqr->lpm = lpm; 60817283b56SCornelia Huck clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 60917283b56SCornelia Huck cqr->retries = 2; 61017283b56SCornelia Huck cqr->buildclk = get_clock(); 61117283b56SCornelia Huck cqr->status = DASD_CQR_FILLED; 61217283b56SCornelia Huck return cqr; 61317283b56SCornelia Huck } 61417283b56SCornelia Huck 61517283b56SCornelia Huck static int dasd_eckd_read_conf_lpm(struct dasd_device *device, 61617283b56SCornelia Huck void **rcd_buffer, 61717283b56SCornelia Huck int *rcd_buffer_size, __u8 lpm) 61817283b56SCornelia Huck { 61917283b56SCornelia Huck struct ciw *ciw; 62017283b56SCornelia Huck char *rcd_buf = NULL; 62117283b56SCornelia Huck int ret; 62217283b56SCornelia Huck struct dasd_ccw_req *cqr; 62317283b56SCornelia Huck 62417283b56SCornelia Huck /* 62517283b56SCornelia Huck * scan for RCD command in extended SenseID data 62617283b56SCornelia Huck */ 62717283b56SCornelia Huck ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 62817283b56SCornelia Huck if (!ciw || ciw->cmd == 0) { 62917283b56SCornelia Huck ret = -EOPNOTSUPP; 63017283b56SCornelia Huck goto out_error; 63117283b56SCornelia Huck } 63217283b56SCornelia Huck rcd_buf = kzalloc(ciw->count, GFP_KERNEL | GFP_DMA); 63317283b56SCornelia Huck if (!rcd_buf) { 63417283b56SCornelia Huck ret = -ENOMEM; 63517283b56SCornelia Huck goto out_error; 63617283b56SCornelia Huck } 6374abb08c2SStefan Weinhuber 6384abb08c2SStefan Weinhuber /* 6394abb08c2SStefan Weinhuber * buffer has to start with EBCDIC "V1.0" to show 6404abb08c2SStefan Weinhuber * support for virtual device SNEQ 6414abb08c2SStefan Weinhuber */ 6424abb08c2SStefan Weinhuber rcd_buf[0] = 0xE5; 6434abb08c2SStefan Weinhuber rcd_buf[1] = 0xF1; 6444abb08c2SStefan Weinhuber rcd_buf[2] = 0x4B; 6454abb08c2SStefan Weinhuber rcd_buf[3] = 0xF0; 64617283b56SCornelia Huck cqr = dasd_eckd_build_rcd_lpm(device, rcd_buf, ciw, lpm); 64717283b56SCornelia Huck if (IS_ERR(cqr)) { 64817283b56SCornelia Huck ret = PTR_ERR(cqr); 64917283b56SCornelia Huck goto out_error; 65017283b56SCornelia Huck } 65117283b56SCornelia Huck ret = dasd_sleep_on(cqr); 65217283b56SCornelia Huck /* 65317283b56SCornelia Huck * on success we update the user input parms 65417283b56SCornelia Huck */ 6558e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 65617283b56SCornelia Huck if (ret) 65717283b56SCornelia Huck goto out_error; 65817283b56SCornelia Huck 65917283b56SCornelia Huck *rcd_buffer_size = ciw->count; 66017283b56SCornelia Huck *rcd_buffer = rcd_buf; 66117283b56SCornelia Huck return 0; 66217283b56SCornelia Huck out_error: 66317283b56SCornelia Huck kfree(rcd_buf); 66417283b56SCornelia Huck *rcd_buffer = NULL; 66517283b56SCornelia Huck *rcd_buffer_size = 0; 66617283b56SCornelia Huck return ret; 66717283b56SCornelia Huck } 66817283b56SCornelia Huck 6694abb08c2SStefan Weinhuber static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private) 6704abb08c2SStefan Weinhuber { 6714abb08c2SStefan Weinhuber 6724abb08c2SStefan Weinhuber struct dasd_sneq *sneq; 6734abb08c2SStefan Weinhuber int i, count; 6744abb08c2SStefan Weinhuber 6754abb08c2SStefan Weinhuber private->ned = NULL; 6764abb08c2SStefan Weinhuber private->sneq = NULL; 6774abb08c2SStefan Weinhuber private->vdsneq = NULL; 6784abb08c2SStefan Weinhuber private->gneq = NULL; 6794abb08c2SStefan Weinhuber count = private->conf_len / sizeof(struct dasd_sneq); 6804abb08c2SStefan Weinhuber sneq = (struct dasd_sneq *)private->conf_data; 6814abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 6824abb08c2SStefan Weinhuber if (sneq->flags.identifier == 1 && sneq->format == 1) 6834abb08c2SStefan Weinhuber private->sneq = sneq; 6844abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 1 && sneq->format == 4) 6854abb08c2SStefan Weinhuber private->vdsneq = (struct vd_sneq *)sneq; 6864abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 2) 6874abb08c2SStefan Weinhuber private->gneq = (struct dasd_gneq *)sneq; 6884abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 3 && sneq->res1 == 1) 6894abb08c2SStefan Weinhuber private->ned = (struct dasd_ned *)sneq; 6904abb08c2SStefan Weinhuber sneq++; 6914abb08c2SStefan Weinhuber } 6924abb08c2SStefan Weinhuber if (!private->ned || !private->gneq) { 6934abb08c2SStefan Weinhuber private->ned = NULL; 6944abb08c2SStefan Weinhuber private->sneq = NULL; 6954abb08c2SStefan Weinhuber private->vdsneq = NULL; 6964abb08c2SStefan Weinhuber private->gneq = NULL; 6974abb08c2SStefan Weinhuber return -EINVAL; 6984abb08c2SStefan Weinhuber } 6994abb08c2SStefan Weinhuber return 0; 7004abb08c2SStefan Weinhuber 7014abb08c2SStefan Weinhuber }; 7024abb08c2SStefan Weinhuber 7034abb08c2SStefan Weinhuber static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len) 7044abb08c2SStefan Weinhuber { 7054abb08c2SStefan Weinhuber struct dasd_gneq *gneq; 7064abb08c2SStefan Weinhuber int i, count, found; 7074abb08c2SStefan Weinhuber 7084abb08c2SStefan Weinhuber count = conf_len / sizeof(*gneq); 7094abb08c2SStefan Weinhuber gneq = (struct dasd_gneq *)conf_data; 7104abb08c2SStefan Weinhuber found = 0; 7114abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 7124abb08c2SStefan Weinhuber if (gneq->flags.identifier == 2) { 7134abb08c2SStefan Weinhuber found = 1; 7144abb08c2SStefan Weinhuber break; 7154abb08c2SStefan Weinhuber } 7164abb08c2SStefan Weinhuber gneq++; 7174abb08c2SStefan Weinhuber } 7184abb08c2SStefan Weinhuber if (found) 7194abb08c2SStefan Weinhuber return ((char *)gneq)[18] & 0x07; 7204abb08c2SStefan Weinhuber else 7214abb08c2SStefan Weinhuber return 0; 7224abb08c2SStefan Weinhuber } 7234abb08c2SStefan Weinhuber 7244abb08c2SStefan Weinhuber static int dasd_eckd_read_conf(struct dasd_device *device) 7251da177e4SLinus Torvalds { 7261da177e4SLinus Torvalds void *conf_data; 7271da177e4SLinus Torvalds int conf_len, conf_data_saved; 7281da177e4SLinus Torvalds int rc; 7291da177e4SLinus Torvalds __u8 lpm; 7301da177e4SLinus Torvalds struct dasd_eckd_private *private; 7311da177e4SLinus Torvalds struct dasd_eckd_path *path_data; 7321da177e4SLinus Torvalds 7331da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 7341da177e4SLinus Torvalds path_data = (struct dasd_eckd_path *) &private->path_data; 7351da177e4SLinus Torvalds path_data->opm = ccw_device_get_path_mask(device->cdev); 7361da177e4SLinus Torvalds lpm = 0x80; 7371da177e4SLinus Torvalds conf_data_saved = 0; 7381da177e4SLinus Torvalds /* get configuration data per operational path */ 7391da177e4SLinus Torvalds for (lpm = 0x80; lpm; lpm>>= 1) { 7401da177e4SLinus Torvalds if (lpm & path_data->opm){ 74117283b56SCornelia Huck rc = dasd_eckd_read_conf_lpm(device, &conf_data, 7421da177e4SLinus Torvalds &conf_len, lpm); 7431da177e4SLinus Torvalds if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ 7441da177e4SLinus Torvalds MESSAGE(KERN_WARNING, 7451da177e4SLinus Torvalds "Read configuration data returned " 7461da177e4SLinus Torvalds "error %d", rc); 7471da177e4SLinus Torvalds return rc; 7481da177e4SLinus Torvalds } 7491da177e4SLinus Torvalds if (conf_data == NULL) { 7501da177e4SLinus Torvalds MESSAGE(KERN_WARNING, "%s", "No configuration " 7511da177e4SLinus Torvalds "data retrieved"); 752d133a960SGabriel Craciunescu continue; /* no error */ 7531da177e4SLinus Torvalds } 7541da177e4SLinus Torvalds /* save first valid configuration data */ 7551da177e4SLinus Torvalds if (!conf_data_saved) { 7564abb08c2SStefan Weinhuber kfree(private->conf_data); 7574abb08c2SStefan Weinhuber private->conf_data = conf_data; 7584abb08c2SStefan Weinhuber private->conf_len = conf_len; 7594abb08c2SStefan Weinhuber if (dasd_eckd_identify_conf_parts(private)) { 7604abb08c2SStefan Weinhuber private->conf_data = NULL; 7614abb08c2SStefan Weinhuber private->conf_len = 0; 7624abb08c2SStefan Weinhuber kfree(conf_data); 7634abb08c2SStefan Weinhuber continue; 7644abb08c2SStefan Weinhuber } 7651da177e4SLinus Torvalds conf_data_saved++; 7661da177e4SLinus Torvalds } 7674abb08c2SStefan Weinhuber switch (dasd_eckd_path_access(conf_data, conf_len)) { 7681da177e4SLinus Torvalds case 0x02: 7691da177e4SLinus Torvalds path_data->npm |= lpm; 7701da177e4SLinus Torvalds break; 7711da177e4SLinus Torvalds case 0x03: 7721da177e4SLinus Torvalds path_data->ppm |= lpm; 7731da177e4SLinus Torvalds break; 7741da177e4SLinus Torvalds } 7754abb08c2SStefan Weinhuber if (conf_data != private->conf_data) 7761da177e4SLinus Torvalds kfree(conf_data); 7771da177e4SLinus Torvalds } 7781da177e4SLinus Torvalds } 7791da177e4SLinus Torvalds return 0; 7801da177e4SLinus Torvalds } 7811da177e4SLinus Torvalds 7828e09f215SStefan Weinhuber static int dasd_eckd_read_features(struct dasd_device *device) 7838e09f215SStefan Weinhuber { 7848e09f215SStefan Weinhuber struct dasd_psf_prssd_data *prssdp; 7858e09f215SStefan Weinhuber struct dasd_rssd_features *features; 7868e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 7878e09f215SStefan Weinhuber struct ccw1 *ccw; 7888e09f215SStefan Weinhuber int rc; 7898e09f215SStefan Weinhuber struct dasd_eckd_private *private; 7908e09f215SStefan Weinhuber 7918e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 7928e09f215SStefan Weinhuber cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 7938e09f215SStefan Weinhuber 1 /* PSF */ + 1 /* RSSD */ , 7948e09f215SStefan Weinhuber (sizeof(struct dasd_psf_prssd_data) + 7958e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)), 7968e09f215SStefan Weinhuber device); 7978e09f215SStefan Weinhuber if (IS_ERR(cqr)) { 7988e09f215SStefan Weinhuber DEV_MESSAGE(KERN_WARNING, device, "%s", 7998e09f215SStefan Weinhuber "Could not allocate initialization request"); 8008e09f215SStefan Weinhuber return PTR_ERR(cqr); 8018e09f215SStefan Weinhuber } 8028e09f215SStefan Weinhuber cqr->startdev = device; 8038e09f215SStefan Weinhuber cqr->memdev = device; 8048e09f215SStefan Weinhuber cqr->block = NULL; 8058e09f215SStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 8068e09f215SStefan Weinhuber cqr->retries = 5; 8078e09f215SStefan Weinhuber cqr->expires = 10 * HZ; 8088e09f215SStefan Weinhuber 8098e09f215SStefan Weinhuber /* Prepare for Read Subsystem Data */ 8108e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 8118e09f215SStefan Weinhuber memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 8128e09f215SStefan Weinhuber prssdp->order = PSF_ORDER_PRSSD; 8138e09f215SStefan Weinhuber prssdp->suborder = 0x41; /* Read Feature Codes */ 8148e09f215SStefan Weinhuber /* all other bytes of prssdp must be zero */ 8158e09f215SStefan Weinhuber 8168e09f215SStefan Weinhuber ccw = cqr->cpaddr; 8178e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PSF; 8188e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_psf_prssd_data); 8198e09f215SStefan Weinhuber ccw->flags |= CCW_FLAG_CC; 8208e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) prssdp; 8218e09f215SStefan Weinhuber 8228e09f215SStefan Weinhuber /* Read Subsystem Data - feature codes */ 8238e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 8248e09f215SStefan Weinhuber memset(features, 0, sizeof(struct dasd_rssd_features)); 8258e09f215SStefan Weinhuber 8268e09f215SStefan Weinhuber ccw++; 8278e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RSSD; 8288e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_rssd_features); 8298e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) features; 8308e09f215SStefan Weinhuber 8318e09f215SStefan Weinhuber cqr->buildclk = get_clock(); 8328e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 8338e09f215SStefan Weinhuber rc = dasd_sleep_on(cqr); 8348e09f215SStefan Weinhuber if (rc == 0) { 8358e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 8368e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 8378e09f215SStefan Weinhuber memcpy(&private->features, features, 8388e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)); 8398e09f215SStefan Weinhuber } 8408e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 8418e09f215SStefan Weinhuber return rc; 8428e09f215SStefan Weinhuber } 8438e09f215SStefan Weinhuber 8448e09f215SStefan Weinhuber 8453d052595SHorst Hummel /* 84640545573SHorst Hummel * Build CP for Perform Subsystem Function - SSC. 84740545573SHorst Hummel */ 8488e09f215SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device) 84940545573SHorst Hummel { 85040545573SHorst Hummel struct dasd_ccw_req *cqr; 85140545573SHorst Hummel struct dasd_psf_ssc_data *psf_ssc_data; 85240545573SHorst Hummel struct ccw1 *ccw; 85340545573SHorst Hummel 85440545573SHorst Hummel cqr = dasd_smalloc_request("ECKD", 1 /* PSF */ , 85540545573SHorst Hummel sizeof(struct dasd_psf_ssc_data), 85640545573SHorst Hummel device); 85740545573SHorst Hummel 85840545573SHorst Hummel if (IS_ERR(cqr)) { 85940545573SHorst Hummel DEV_MESSAGE(KERN_WARNING, device, "%s", 86040545573SHorst Hummel "Could not allocate PSF-SSC request"); 86140545573SHorst Hummel return cqr; 86240545573SHorst Hummel } 86340545573SHorst Hummel psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 86440545573SHorst Hummel psf_ssc_data->order = PSF_ORDER_SSC; 8658e09f215SStefan Weinhuber psf_ssc_data->suborder = 0x88; 8668e09f215SStefan Weinhuber psf_ssc_data->reserved[0] = 0x88; 86740545573SHorst Hummel 86840545573SHorst Hummel ccw = cqr->cpaddr; 86940545573SHorst Hummel ccw->cmd_code = DASD_ECKD_CCW_PSF; 87040545573SHorst Hummel ccw->cda = (__u32)(addr_t)psf_ssc_data; 87140545573SHorst Hummel ccw->count = 66; 87240545573SHorst Hummel 8738e09f215SStefan Weinhuber cqr->startdev = device; 8748e09f215SStefan Weinhuber cqr->memdev = device; 8758e09f215SStefan Weinhuber cqr->block = NULL; 87640545573SHorst Hummel cqr->expires = 10*HZ; 87740545573SHorst Hummel cqr->buildclk = get_clock(); 87840545573SHorst Hummel cqr->status = DASD_CQR_FILLED; 87940545573SHorst Hummel return cqr; 88040545573SHorst Hummel } 88140545573SHorst Hummel 88240545573SHorst Hummel /* 88340545573SHorst Hummel * Perform Subsystem Function. 88440545573SHorst Hummel * It is necessary to trigger CIO for channel revalidation since this 88540545573SHorst Hummel * call might change behaviour of DASD devices. 88640545573SHorst Hummel */ 88740545573SHorst Hummel static int 88840545573SHorst Hummel dasd_eckd_psf_ssc(struct dasd_device *device) 88940545573SHorst Hummel { 89040545573SHorst Hummel struct dasd_ccw_req *cqr; 89140545573SHorst Hummel int rc; 89240545573SHorst Hummel 89340545573SHorst Hummel cqr = dasd_eckd_build_psf_ssc(device); 89440545573SHorst Hummel if (IS_ERR(cqr)) 89540545573SHorst Hummel return PTR_ERR(cqr); 89640545573SHorst Hummel 89740545573SHorst Hummel rc = dasd_sleep_on(cqr); 89840545573SHorst Hummel if (!rc) 89940545573SHorst Hummel /* trigger CIO to reprobe devices */ 90040545573SHorst Hummel css_schedule_reprobe(); 9018e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 90240545573SHorst Hummel return rc; 90340545573SHorst Hummel } 90440545573SHorst Hummel 90540545573SHorst Hummel /* 90640545573SHorst Hummel * Valide storage server of current device. 90740545573SHorst Hummel */ 9088e09f215SStefan Weinhuber static int dasd_eckd_validate_server(struct dasd_device *device) 90940545573SHorst Hummel { 91040545573SHorst Hummel int rc; 9118e09f215SStefan Weinhuber struct dasd_eckd_private *private; 91240545573SHorst Hummel 91340545573SHorst Hummel /* Currently PAV is the only reason to 'validate' server on LPAR */ 91440545573SHorst Hummel if (dasd_nopav || MACHINE_IS_VM) 91540545573SHorst Hummel return 0; 91640545573SHorst Hummel 91740545573SHorst Hummel rc = dasd_eckd_psf_ssc(device); 91840545573SHorst Hummel /* may be requested feature is not available on server, 91940545573SHorst Hummel * therefore just report error and go ahead */ 9208e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 92140545573SHorst Hummel DEV_MESSAGE(KERN_INFO, device, 9228e79a441SHorst Hummel "PSF-SSC on storage subsystem %s.%s.%04x returned rc=%d", 9238e09f215SStefan Weinhuber private->uid.vendor, private->uid.serial, 9248e09f215SStefan Weinhuber private->uid.ssid, rc); 92540545573SHorst Hummel /* RE-Read Configuration Data */ 92640545573SHorst Hummel return dasd_eckd_read_conf(device); 92740545573SHorst Hummel } 92840545573SHorst Hummel 92940545573SHorst Hummel /* 9303d052595SHorst Hummel * Check device characteristics. 9313d052595SHorst Hummel * If the device is accessible using ECKD discipline, the device is enabled. 9323d052595SHorst Hummel */ 9331da177e4SLinus Torvalds static int 9341da177e4SLinus Torvalds dasd_eckd_check_characteristics(struct dasd_device *device) 9351da177e4SLinus Torvalds { 9361da177e4SLinus Torvalds struct dasd_eckd_private *private; 9378e09f215SStefan Weinhuber struct dasd_block *block; 9381da177e4SLinus Torvalds void *rdc_data; 9398e09f215SStefan Weinhuber int is_known, rc; 9401da177e4SLinus Torvalds 9411da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 9421da177e4SLinus Torvalds if (private == NULL) { 943138c014dSHorst Hummel private = kzalloc(sizeof(struct dasd_eckd_private), 9441da177e4SLinus Torvalds GFP_KERNEL | GFP_DMA); 9451da177e4SLinus Torvalds if (private == NULL) { 9461da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 9471da177e4SLinus Torvalds "memory allocation failed for private " 9481da177e4SLinus Torvalds "data"); 9491da177e4SLinus Torvalds return -ENOMEM; 9501da177e4SLinus Torvalds } 9511da177e4SLinus Torvalds device->private = (void *) private; 9521da177e4SLinus Torvalds } 9531da177e4SLinus Torvalds /* Invalidate status of initial analysis. */ 9541da177e4SLinus Torvalds private->init_cqr_status = -1; 9551da177e4SLinus Torvalds /* Set default cache operations. */ 9561da177e4SLinus Torvalds private->attrib.operation = DASD_NORMAL_CACHE; 9571da177e4SLinus Torvalds private->attrib.nr_cyl = 0; 9581da177e4SLinus Torvalds 95940545573SHorst Hummel /* Read Configuration Data */ 96040545573SHorst Hummel rc = dasd_eckd_read_conf(device); 96140545573SHorst Hummel if (rc) 9628e09f215SStefan Weinhuber goto out_err1; 96340545573SHorst Hummel 96440545573SHorst Hummel /* Generate device unique id and register in devmap */ 9658e09f215SStefan Weinhuber rc = dasd_eckd_generate_uid(device, &private->uid); 96640545573SHorst Hummel if (rc) 9678e09f215SStefan Weinhuber goto out_err1; 9688e09f215SStefan Weinhuber dasd_set_uid(device->cdev, &private->uid); 9698e09f215SStefan Weinhuber 9708e09f215SStefan Weinhuber if (private->uid.type == UA_BASE_DEVICE) { 9718e09f215SStefan Weinhuber block = dasd_alloc_block(); 9728e09f215SStefan Weinhuber if (IS_ERR(block)) { 9738e09f215SStefan Weinhuber DEV_MESSAGE(KERN_WARNING, device, "%s", 9748e09f215SStefan Weinhuber "could not allocate dasd block structure"); 9758e09f215SStefan Weinhuber rc = PTR_ERR(block); 9768e09f215SStefan Weinhuber goto out_err1; 9778e09f215SStefan Weinhuber } 9788e09f215SStefan Weinhuber device->block = block; 9798e09f215SStefan Weinhuber block->base = device; 9808e09f215SStefan Weinhuber } 9818e09f215SStefan Weinhuber 9828e09f215SStefan Weinhuber /* register lcu with alias handling, enable PAV if this is a new lcu */ 9838e09f215SStefan Weinhuber is_known = dasd_alias_make_device_known_to_lcu(device); 9848e09f215SStefan Weinhuber if (is_known < 0) { 9858e09f215SStefan Weinhuber rc = is_known; 9868e09f215SStefan Weinhuber goto out_err2; 9878e09f215SStefan Weinhuber } 9888e09f215SStefan Weinhuber if (!is_known) { 9898e09f215SStefan Weinhuber /* new lcu found */ 9908e09f215SStefan Weinhuber rc = dasd_eckd_validate_server(device); /* will switch pav on */ 99140545573SHorst Hummel if (rc) 9928e09f215SStefan Weinhuber goto out_err3; 9938e09f215SStefan Weinhuber } 9948e09f215SStefan Weinhuber 9958e09f215SStefan Weinhuber /* Read Feature Codes */ 9968e09f215SStefan Weinhuber rc = dasd_eckd_read_features(device); 9978e09f215SStefan Weinhuber if (rc) 9988e09f215SStefan Weinhuber goto out_err3; 99940545573SHorst Hummel 10001da177e4SLinus Torvalds /* Read Device Characteristics */ 10011da177e4SLinus Torvalds rdc_data = (void *) &(private->rdc_data); 10023d052595SHorst Hummel memset(rdc_data, 0, sizeof(rdc_data)); 100317283b56SCornelia Huck rc = dasd_generic_read_dev_chars(device, "ECKD", &rdc_data, 64); 10048e09f215SStefan Weinhuber if (rc) { 10051da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, 100640545573SHorst Hummel "Read device characteristics returned " 100740545573SHorst Hummel "rc=%d", rc); 10088e09f215SStefan Weinhuber goto out_err3; 10098e09f215SStefan Weinhuber } 1010b44b0ab3SStefan Weinhuber /* find the vaild cylinder size */ 1011b44b0ab3SStefan Weinhuber if (private->rdc_data.no_cyl == LV_COMPAT_CYL && 1012b44b0ab3SStefan Weinhuber private->rdc_data.long_no_cyl) 1013b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.long_no_cyl; 1014b44b0ab3SStefan Weinhuber else 1015b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.no_cyl; 1016b44b0ab3SStefan Weinhuber 10171da177e4SLinus Torvalds DEV_MESSAGE(KERN_INFO, device, 10181da177e4SLinus Torvalds "%04X/%02X(CU:%04X/%02X) Cyl:%d Head:%d Sec:%d", 10191da177e4SLinus Torvalds private->rdc_data.dev_type, 10201da177e4SLinus Torvalds private->rdc_data.dev_model, 10211da177e4SLinus Torvalds private->rdc_data.cu_type, 10221da177e4SLinus Torvalds private->rdc_data.cu_model.model, 1023b44b0ab3SStefan Weinhuber private->real_cyl, 10241da177e4SLinus Torvalds private->rdc_data.trk_per_cyl, 10251da177e4SLinus Torvalds private->rdc_data.sec_per_trk); 10268e09f215SStefan Weinhuber return 0; 10278e09f215SStefan Weinhuber 10288e09f215SStefan Weinhuber out_err3: 10298e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 10308e09f215SStefan Weinhuber out_err2: 10318e09f215SStefan Weinhuber dasd_free_block(device->block); 10328e09f215SStefan Weinhuber device->block = NULL; 10338e09f215SStefan Weinhuber out_err1: 10344abb08c2SStefan Weinhuber kfree(private->conf_data); 10358e09f215SStefan Weinhuber kfree(device->private); 10368e09f215SStefan Weinhuber device->private = NULL; 10373d052595SHorst Hummel return rc; 10381da177e4SLinus Torvalds } 10391da177e4SLinus Torvalds 10408e09f215SStefan Weinhuber static void dasd_eckd_uncheck_device(struct dasd_device *device) 10418e09f215SStefan Weinhuber { 10424abb08c2SStefan Weinhuber struct dasd_eckd_private *private; 10434abb08c2SStefan Weinhuber 10444abb08c2SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 10458e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 10464abb08c2SStefan Weinhuber private->ned = NULL; 10474abb08c2SStefan Weinhuber private->sneq = NULL; 10484abb08c2SStefan Weinhuber private->vdsneq = NULL; 10494abb08c2SStefan Weinhuber private->gneq = NULL; 10504abb08c2SStefan Weinhuber private->conf_len = 0; 10514abb08c2SStefan Weinhuber kfree(private->conf_data); 10524abb08c2SStefan Weinhuber private->conf_data = NULL; 10538e09f215SStefan Weinhuber } 10548e09f215SStefan Weinhuber 10551da177e4SLinus Torvalds static struct dasd_ccw_req * 10561da177e4SLinus Torvalds dasd_eckd_analysis_ccw(struct dasd_device *device) 10571da177e4SLinus Torvalds { 10581da177e4SLinus Torvalds struct dasd_eckd_private *private; 10591da177e4SLinus Torvalds struct eckd_count *count_data; 10601da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 10611da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 10621da177e4SLinus Torvalds struct ccw1 *ccw; 10631da177e4SLinus Torvalds int cplength, datasize; 10641da177e4SLinus Torvalds int i; 10651da177e4SLinus Torvalds 10661da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 10671da177e4SLinus Torvalds 10681da177e4SLinus Torvalds cplength = 8; 10691da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 10701da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 10711da177e4SLinus Torvalds cplength, datasize, device); 10721da177e4SLinus Torvalds if (IS_ERR(cqr)) 10731da177e4SLinus Torvalds return cqr; 10741da177e4SLinus Torvalds ccw = cqr->cpaddr; 10751da177e4SLinus Torvalds /* Define extent for the first 3 tracks. */ 10761da177e4SLinus Torvalds define_extent(ccw++, cqr->data, 0, 2, 10771da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device); 10781da177e4SLinus Torvalds LO_data = cqr->data + sizeof(struct DE_eckd_data); 10791da177e4SLinus Torvalds /* Locate record for the first 4 records on track 0. */ 10801da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 10811da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 0, 0, 4, 10821da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 10831da177e4SLinus Torvalds 10841da177e4SLinus Torvalds count_data = private->count_area; 10851da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 10861da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 10871da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 10881da177e4SLinus Torvalds ccw->flags = 0; 10891da177e4SLinus Torvalds ccw->count = 8; 10901da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 10911da177e4SLinus Torvalds ccw++; 10921da177e4SLinus Torvalds count_data++; 10931da177e4SLinus Torvalds } 10941da177e4SLinus Torvalds 10951da177e4SLinus Torvalds /* Locate record for the first record on track 2. */ 10961da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 10971da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 2, 0, 1, 10981da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 10991da177e4SLinus Torvalds /* Read count ccw. */ 11001da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 11011da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 11021da177e4SLinus Torvalds ccw->flags = 0; 11031da177e4SLinus Torvalds ccw->count = 8; 11041da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 11051da177e4SLinus Torvalds 11068e09f215SStefan Weinhuber cqr->block = NULL; 11078e09f215SStefan Weinhuber cqr->startdev = device; 11088e09f215SStefan Weinhuber cqr->memdev = device; 11091da177e4SLinus Torvalds cqr->retries = 0; 11101da177e4SLinus Torvalds cqr->buildclk = get_clock(); 11111da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 11121da177e4SLinus Torvalds return cqr; 11131da177e4SLinus Torvalds } 11141da177e4SLinus Torvalds 11151da177e4SLinus Torvalds /* 11161da177e4SLinus Torvalds * This is the callback function for the init_analysis cqr. It saves 11171da177e4SLinus Torvalds * the status of the initial analysis ccw before it frees it and kicks 11181da177e4SLinus Torvalds * the device to continue the startup sequence. This will call 11191da177e4SLinus Torvalds * dasd_eckd_do_analysis again (if the devices has not been marked 11201da177e4SLinus Torvalds * for deletion in the meantime). 11211da177e4SLinus Torvalds */ 11221da177e4SLinus Torvalds static void 11231da177e4SLinus Torvalds dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, void *data) 11241da177e4SLinus Torvalds { 11251da177e4SLinus Torvalds struct dasd_eckd_private *private; 11261da177e4SLinus Torvalds struct dasd_device *device; 11271da177e4SLinus Torvalds 11288e09f215SStefan Weinhuber device = init_cqr->startdev; 11291da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 11301da177e4SLinus Torvalds private->init_cqr_status = init_cqr->status; 11311da177e4SLinus Torvalds dasd_sfree_request(init_cqr, device); 11321da177e4SLinus Torvalds dasd_kick_device(device); 11331da177e4SLinus Torvalds } 11341da177e4SLinus Torvalds 11351da177e4SLinus Torvalds static int 11368e09f215SStefan Weinhuber dasd_eckd_start_analysis(struct dasd_block *block) 11371da177e4SLinus Torvalds { 11381da177e4SLinus Torvalds struct dasd_eckd_private *private; 11391da177e4SLinus Torvalds struct dasd_ccw_req *init_cqr; 11401da177e4SLinus Torvalds 11418e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 11428e09f215SStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(block->base); 11431da177e4SLinus Torvalds if (IS_ERR(init_cqr)) 11441da177e4SLinus Torvalds return PTR_ERR(init_cqr); 11451da177e4SLinus Torvalds init_cqr->callback = dasd_eckd_analysis_callback; 11461da177e4SLinus Torvalds init_cqr->callback_data = NULL; 11471da177e4SLinus Torvalds init_cqr->expires = 5*HZ; 11481da177e4SLinus Torvalds dasd_add_request_head(init_cqr); 11491da177e4SLinus Torvalds return -EAGAIN; 11501da177e4SLinus Torvalds } 11511da177e4SLinus Torvalds 11521da177e4SLinus Torvalds static int 11538e09f215SStefan Weinhuber dasd_eckd_end_analysis(struct dasd_block *block) 11541da177e4SLinus Torvalds { 11558e09f215SStefan Weinhuber struct dasd_device *device; 11561da177e4SLinus Torvalds struct dasd_eckd_private *private; 11571da177e4SLinus Torvalds struct eckd_count *count_area; 11581da177e4SLinus Torvalds unsigned int sb, blk_per_trk; 11591da177e4SLinus Torvalds int status, i; 11601da177e4SLinus Torvalds 11618e09f215SStefan Weinhuber device = block->base; 11621da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 11631da177e4SLinus Torvalds status = private->init_cqr_status; 11641da177e4SLinus Torvalds private->init_cqr_status = -1; 11651da177e4SLinus Torvalds if (status != DASD_CQR_DONE) { 11661da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 11671da177e4SLinus Torvalds "volume analysis returned unformatted disk"); 11681da177e4SLinus Torvalds return -EMEDIUMTYPE; 11691da177e4SLinus Torvalds } 11701da177e4SLinus Torvalds 11711da177e4SLinus Torvalds private->uses_cdl = 1; 11721da177e4SLinus Torvalds /* Check Track 0 for Compatible Disk Layout */ 11731da177e4SLinus Torvalds count_area = NULL; 11741da177e4SLinus Torvalds for (i = 0; i < 3; i++) { 11751da177e4SLinus Torvalds if (private->count_area[i].kl != 4 || 11761da177e4SLinus Torvalds private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4) { 11771da177e4SLinus Torvalds private->uses_cdl = 0; 11781da177e4SLinus Torvalds break; 11791da177e4SLinus Torvalds } 11801da177e4SLinus Torvalds } 11811da177e4SLinus Torvalds if (i == 3) 11821da177e4SLinus Torvalds count_area = &private->count_area[4]; 11831da177e4SLinus Torvalds 11841da177e4SLinus Torvalds if (private->uses_cdl == 0) { 11851da177e4SLinus Torvalds for (i = 0; i < 5; i++) { 11861da177e4SLinus Torvalds if ((private->count_area[i].kl != 0) || 11871da177e4SLinus Torvalds (private->count_area[i].dl != 11881da177e4SLinus Torvalds private->count_area[0].dl)) 11891da177e4SLinus Torvalds break; 11901da177e4SLinus Torvalds } 11911da177e4SLinus Torvalds if (i == 5) 11921da177e4SLinus Torvalds count_area = &private->count_area[0]; 11931da177e4SLinus Torvalds } else { 11941da177e4SLinus Torvalds if (private->count_area[3].record == 1) 11951da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 11961da177e4SLinus Torvalds "Trk 0: no records after VTOC!"); 11971da177e4SLinus Torvalds } 11981da177e4SLinus Torvalds if (count_area != NULL && count_area->kl == 0) { 11991da177e4SLinus Torvalds /* we found notthing violating our disk layout */ 12001da177e4SLinus Torvalds if (dasd_check_blocksize(count_area->dl) == 0) 12018e09f215SStefan Weinhuber block->bp_block = count_area->dl; 12021da177e4SLinus Torvalds } 12038e09f215SStefan Weinhuber if (block->bp_block == 0) { 12041da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 12051da177e4SLinus Torvalds "Volume has incompatible disk layout"); 12061da177e4SLinus Torvalds return -EMEDIUMTYPE; 12071da177e4SLinus Torvalds } 12088e09f215SStefan Weinhuber block->s2b_shift = 0; /* bits to shift 512 to get a block */ 12098e09f215SStefan Weinhuber for (sb = 512; sb < block->bp_block; sb = sb << 1) 12108e09f215SStefan Weinhuber block->s2b_shift++; 12111da177e4SLinus Torvalds 12128e09f215SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 1213b44b0ab3SStefan Weinhuber block->blocks = (private->real_cyl * 12141da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 12151da177e4SLinus Torvalds blk_per_trk); 12161da177e4SLinus Torvalds 12171da177e4SLinus Torvalds DEV_MESSAGE(KERN_INFO, device, 12181da177e4SLinus Torvalds "(%dkB blks): %dkB at %dkB/trk %s", 12198e09f215SStefan Weinhuber (block->bp_block >> 10), 1220b44b0ab3SStefan Weinhuber ((private->real_cyl * 12211da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 12228e09f215SStefan Weinhuber blk_per_trk * (block->bp_block >> 9)) >> 1), 12238e09f215SStefan Weinhuber ((blk_per_trk * block->bp_block) >> 10), 12241da177e4SLinus Torvalds private->uses_cdl ? 12251da177e4SLinus Torvalds "compatible disk layout" : "linux disk layout"); 12261da177e4SLinus Torvalds 12271da177e4SLinus Torvalds return 0; 12281da177e4SLinus Torvalds } 12291da177e4SLinus Torvalds 12308e09f215SStefan Weinhuber static int dasd_eckd_do_analysis(struct dasd_block *block) 12311da177e4SLinus Torvalds { 12321da177e4SLinus Torvalds struct dasd_eckd_private *private; 12331da177e4SLinus Torvalds 12348e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 12351da177e4SLinus Torvalds if (private->init_cqr_status < 0) 12368e09f215SStefan Weinhuber return dasd_eckd_start_analysis(block); 12371da177e4SLinus Torvalds else 12388e09f215SStefan Weinhuber return dasd_eckd_end_analysis(block); 12391da177e4SLinus Torvalds } 12401da177e4SLinus Torvalds 12418e09f215SStefan Weinhuber static int dasd_eckd_ready_to_online(struct dasd_device *device) 12428e09f215SStefan Weinhuber { 12438e09f215SStefan Weinhuber return dasd_alias_add_device(device); 12448e09f215SStefan Weinhuber }; 12458e09f215SStefan Weinhuber 12468e09f215SStefan Weinhuber static int dasd_eckd_online_to_ready(struct dasd_device *device) 12478e09f215SStefan Weinhuber { 12488e09f215SStefan Weinhuber return dasd_alias_remove_device(device); 12498e09f215SStefan Weinhuber }; 12508e09f215SStefan Weinhuber 12511da177e4SLinus Torvalds static int 12528e09f215SStefan Weinhuber dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 12531da177e4SLinus Torvalds { 12541da177e4SLinus Torvalds struct dasd_eckd_private *private; 12551da177e4SLinus Torvalds 12568e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 12578e09f215SStefan Weinhuber if (dasd_check_blocksize(block->bp_block) == 0) { 12581da177e4SLinus Torvalds geo->sectors = recs_per_track(&private->rdc_data, 12598e09f215SStefan Weinhuber 0, block->bp_block); 12601da177e4SLinus Torvalds } 12611da177e4SLinus Torvalds geo->cylinders = private->rdc_data.no_cyl; 12621da177e4SLinus Torvalds geo->heads = private->rdc_data.trk_per_cyl; 12631da177e4SLinus Torvalds return 0; 12641da177e4SLinus Torvalds } 12651da177e4SLinus Torvalds 12661da177e4SLinus Torvalds static struct dasd_ccw_req * 12671da177e4SLinus Torvalds dasd_eckd_format_device(struct dasd_device * device, 12681da177e4SLinus Torvalds struct format_data_t * fdata) 12691da177e4SLinus Torvalds { 12701da177e4SLinus Torvalds struct dasd_eckd_private *private; 12711da177e4SLinus Torvalds struct dasd_ccw_req *fcp; 12721da177e4SLinus Torvalds struct eckd_count *ect; 12731da177e4SLinus Torvalds struct ccw1 *ccw; 12741da177e4SLinus Torvalds void *data; 1275b44b0ab3SStefan Weinhuber int rpt; 1276b44b0ab3SStefan Weinhuber struct ch_t address; 12771da177e4SLinus Torvalds int cplength, datasize; 12781da177e4SLinus Torvalds int i; 1279f9a28f7bSJean-Baptiste Joret int intensity = 0; 1280f9a28f7bSJean-Baptiste Joret int r0_perm; 12811da177e4SLinus Torvalds 12821da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 12831da177e4SLinus Torvalds rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize); 1284b44b0ab3SStefan Weinhuber set_ch_t(&address, 1285b44b0ab3SStefan Weinhuber fdata->start_unit / private->rdc_data.trk_per_cyl, 1286b44b0ab3SStefan Weinhuber fdata->start_unit % private->rdc_data.trk_per_cyl); 12871da177e4SLinus Torvalds 12881da177e4SLinus Torvalds /* Sanity checks. */ 12891da177e4SLinus Torvalds if (fdata->start_unit >= 1290b44b0ab3SStefan Weinhuber (private->real_cyl * private->rdc_data.trk_per_cyl)) { 1291b44b0ab3SStefan Weinhuber DEV_MESSAGE(KERN_INFO, device, "Track no %u too big!", 12921da177e4SLinus Torvalds fdata->start_unit); 12931da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 12941da177e4SLinus Torvalds } 12951da177e4SLinus Torvalds if (fdata->start_unit > fdata->stop_unit) { 1296b44b0ab3SStefan Weinhuber DEV_MESSAGE(KERN_INFO, device, "Track %u reached! ending.", 12971da177e4SLinus Torvalds fdata->start_unit); 12981da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 12991da177e4SLinus Torvalds } 13001da177e4SLinus Torvalds if (dasd_check_blocksize(fdata->blksize) != 0) { 13011da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, 1302b44b0ab3SStefan Weinhuber "Invalid blocksize %u...terminating!", 13031da177e4SLinus Torvalds fdata->blksize); 13041da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 13051da177e4SLinus Torvalds } 13061da177e4SLinus Torvalds 13071da177e4SLinus Torvalds /* 13081da177e4SLinus Torvalds * fdata->intensity is a bit string that tells us what to do: 13091da177e4SLinus Torvalds * Bit 0: write record zero 13101da177e4SLinus Torvalds * Bit 1: write home address, currently not supported 13111da177e4SLinus Torvalds * Bit 2: invalidate tracks 13121da177e4SLinus Torvalds * Bit 3: use OS/390 compatible disk layout (cdl) 1313f9a28f7bSJean-Baptiste Joret * Bit 4: do not allow storage subsystem to modify record zero 13141da177e4SLinus Torvalds * Only some bit combinations do make sense. 13151da177e4SLinus Torvalds */ 1316f9a28f7bSJean-Baptiste Joret if (fdata->intensity & 0x10) { 1317f9a28f7bSJean-Baptiste Joret r0_perm = 0; 1318f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity & ~0x10; 1319f9a28f7bSJean-Baptiste Joret } else { 1320f9a28f7bSJean-Baptiste Joret r0_perm = 1; 1321f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity; 1322f9a28f7bSJean-Baptiste Joret } 1323f9a28f7bSJean-Baptiste Joret switch (intensity) { 13241da177e4SLinus Torvalds case 0x00: /* Normal format */ 13251da177e4SLinus Torvalds case 0x08: /* Normal format, use cdl. */ 13261da177e4SLinus Torvalds cplength = 2 + rpt; 13271da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 13281da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 13291da177e4SLinus Torvalds rpt * sizeof(struct eckd_count); 13301da177e4SLinus Torvalds break; 13311da177e4SLinus Torvalds case 0x01: /* Write record zero and format track. */ 13321da177e4SLinus Torvalds case 0x09: /* Write record zero and format track, use cdl. */ 13331da177e4SLinus Torvalds cplength = 3 + rpt; 13341da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 13351da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 13361da177e4SLinus Torvalds sizeof(struct eckd_count) + 13371da177e4SLinus Torvalds rpt * sizeof(struct eckd_count); 13381da177e4SLinus Torvalds break; 13391da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 13401da177e4SLinus Torvalds case 0x0c: /* Invalidate track, use cdl. */ 13411da177e4SLinus Torvalds cplength = 3; 13421da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 13431da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 13441da177e4SLinus Torvalds sizeof(struct eckd_count); 13451da177e4SLinus Torvalds break; 13461da177e4SLinus Torvalds default: 13471da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "Invalid flags 0x%x.", 13481da177e4SLinus Torvalds fdata->intensity); 13491da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 13501da177e4SLinus Torvalds } 13511da177e4SLinus Torvalds /* Allocate the format ccw request. */ 13521da177e4SLinus Torvalds fcp = dasd_smalloc_request(dasd_eckd_discipline.name, 13531da177e4SLinus Torvalds cplength, datasize, device); 13541da177e4SLinus Torvalds if (IS_ERR(fcp)) 13551da177e4SLinus Torvalds return fcp; 13561da177e4SLinus Torvalds 13571da177e4SLinus Torvalds data = fcp->data; 13581da177e4SLinus Torvalds ccw = fcp->cpaddr; 13591da177e4SLinus Torvalds 1360f9a28f7bSJean-Baptiste Joret switch (intensity & ~0x08) { 13611da177e4SLinus Torvalds case 0x00: /* Normal format. */ 13621da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 13631da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 13641da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device); 1365f9a28f7bSJean-Baptiste Joret /* grant subsystem permission to format R0 */ 1366f9a28f7bSJean-Baptiste Joret if (r0_perm) 1367f9a28f7bSJean-Baptiste Joret ((struct DE_eckd_data *)data)->ga_extended |= 0x04; 13681da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 13691da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 13701da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 13711da177e4SLinus Torvalds fdata->start_unit, 0, rpt, 13721da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device, 13731da177e4SLinus Torvalds fdata->blksize); 13741da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 13751da177e4SLinus Torvalds break; 13761da177e4SLinus Torvalds case 0x01: /* Write record zero + format track. */ 13771da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 13781da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 13791da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, 13801da177e4SLinus Torvalds 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, rpt + 1, 13851da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, device, 13868e09f215SStefan Weinhuber device->block->bp_block); 13871da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 13881da177e4SLinus Torvalds break; 13891da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 13901da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 13911da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 13921da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device); 13931da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 13941da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 13951da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 13961da177e4SLinus Torvalds fdata->start_unit, 0, 1, 13971da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device, 8); 13981da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 13991da177e4SLinus Torvalds break; 14001da177e4SLinus Torvalds } 1401f9a28f7bSJean-Baptiste Joret if (intensity & 0x01) { /* write record zero */ 14021da177e4SLinus Torvalds ect = (struct eckd_count *) data; 14031da177e4SLinus Torvalds data += sizeof(struct eckd_count); 1404b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 1405b44b0ab3SStefan Weinhuber ect->head = address.head; 14061da177e4SLinus Torvalds ect->record = 0; 14071da177e4SLinus Torvalds ect->kl = 0; 14081da177e4SLinus Torvalds ect->dl = 8; 14091da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 14101da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 14111da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 14121da177e4SLinus Torvalds ccw->count = 8; 14131da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 14141da177e4SLinus Torvalds ccw++; 14151da177e4SLinus Torvalds } 1416f9a28f7bSJean-Baptiste Joret if ((intensity & ~0x08) & 0x04) { /* erase track */ 14171da177e4SLinus Torvalds ect = (struct eckd_count *) data; 14181da177e4SLinus Torvalds data += sizeof(struct eckd_count); 1419b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 1420b44b0ab3SStefan Weinhuber ect->head = address.head; 14211da177e4SLinus Torvalds ect->record = 1; 14221da177e4SLinus Torvalds ect->kl = 0; 14231da177e4SLinus Torvalds ect->dl = 0; 14241da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 14251da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 14261da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 14271da177e4SLinus Torvalds ccw->count = 8; 14281da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 14291da177e4SLinus Torvalds } else { /* write remaining records */ 14301da177e4SLinus Torvalds for (i = 0; i < rpt; i++) { 14311da177e4SLinus Torvalds ect = (struct eckd_count *) data; 14321da177e4SLinus Torvalds data += sizeof(struct eckd_count); 1433b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 1434b44b0ab3SStefan Weinhuber ect->head = address.head; 14351da177e4SLinus Torvalds ect->record = i + 1; 14361da177e4SLinus Torvalds ect->kl = 0; 14371da177e4SLinus Torvalds ect->dl = fdata->blksize; 14381da177e4SLinus Torvalds /* Check for special tracks 0-1 when formatting CDL */ 1439f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 14401da177e4SLinus Torvalds fdata->start_unit == 0) { 14411da177e4SLinus Torvalds if (i < 3) { 14421da177e4SLinus Torvalds ect->kl = 4; 14431da177e4SLinus Torvalds ect->dl = sizes_trk0[i] - 4; 14441da177e4SLinus Torvalds } 14451da177e4SLinus Torvalds } 1446f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 14471da177e4SLinus Torvalds fdata->start_unit == 1) { 14481da177e4SLinus Torvalds ect->kl = 44; 14491da177e4SLinus Torvalds ect->dl = LABEL_SIZE - 44; 14501da177e4SLinus Torvalds } 14511da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 14521da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 14531da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 14541da177e4SLinus Torvalds ccw->count = 8; 14551da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 14561da177e4SLinus Torvalds ccw++; 14571da177e4SLinus Torvalds } 14581da177e4SLinus Torvalds } 14598e09f215SStefan Weinhuber fcp->startdev = device; 14608e09f215SStefan Weinhuber fcp->memdev = device; 14618e09f215SStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &fcp->flags); 14628e09f215SStefan Weinhuber fcp->retries = 5; /* set retry counter to enable default ERP */ 14631da177e4SLinus Torvalds fcp->buildclk = get_clock(); 14641da177e4SLinus Torvalds fcp->status = DASD_CQR_FILLED; 14651da177e4SLinus Torvalds return fcp; 14661da177e4SLinus Torvalds } 14671da177e4SLinus Torvalds 14688e09f215SStefan Weinhuber static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 14691da177e4SLinus Torvalds { 14708e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 14718e09f215SStefan Weinhuber if (cqr->block && (cqr->startdev != cqr->block->base)) { 14728e09f215SStefan Weinhuber dasd_eckd_reset_ccw_to_base_io(cqr); 14738e09f215SStefan Weinhuber cqr->startdev = cqr->block->base; 14741da177e4SLinus Torvalds } 14758e09f215SStefan Weinhuber }; 14761da177e4SLinus Torvalds 14771da177e4SLinus Torvalds static dasd_erp_fn_t 14781da177e4SLinus Torvalds dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 14791da177e4SLinus Torvalds { 14808e09f215SStefan Weinhuber struct dasd_device *device = (struct dasd_device *) cqr->startdev; 14811da177e4SLinus Torvalds struct ccw_device *cdev = device->cdev; 14821da177e4SLinus Torvalds 14831da177e4SLinus Torvalds switch (cdev->id.cu_type) { 14841da177e4SLinus Torvalds case 0x3990: 14851da177e4SLinus Torvalds case 0x2105: 14861da177e4SLinus Torvalds case 0x2107: 14871da177e4SLinus Torvalds case 0x1750: 14881da177e4SLinus Torvalds return dasd_3990_erp_action; 14891da177e4SLinus Torvalds case 0x9343: 14901da177e4SLinus Torvalds case 0x3880: 14911da177e4SLinus Torvalds default: 14921da177e4SLinus Torvalds return dasd_default_erp_action; 14931da177e4SLinus Torvalds } 14941da177e4SLinus Torvalds } 14951da177e4SLinus Torvalds 14961da177e4SLinus Torvalds static dasd_erp_fn_t 14971da177e4SLinus Torvalds dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 14981da177e4SLinus Torvalds { 14991da177e4SLinus Torvalds return dasd_default_erp_postaction; 15001da177e4SLinus Torvalds } 15011da177e4SLinus Torvalds 15028e09f215SStefan Weinhuber 15038e09f215SStefan Weinhuber static void dasd_eckd_handle_unsolicited_interrupt(struct dasd_device *device, 15048e09f215SStefan Weinhuber struct irb *irb) 15058e09f215SStefan Weinhuber { 15068e09f215SStefan Weinhuber char mask; 15078e09f215SStefan Weinhuber 15088e09f215SStefan Weinhuber /* first of all check for state change pending interrupt */ 15098e09f215SStefan Weinhuber mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 151023d805b6SPeter Oberparleiter if ((irb->scsw.cmd.dstat & mask) == mask) { 15118e09f215SStefan Weinhuber dasd_generic_handle_state_change(device); 15128e09f215SStefan Weinhuber return; 15138e09f215SStefan Weinhuber } 15148e09f215SStefan Weinhuber 15158e09f215SStefan Weinhuber /* summary unit check */ 151623d805b6SPeter Oberparleiter if ((irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) && 151723d805b6SPeter Oberparleiter (irb->ecw[7] == 0x0D)) { 15188e09f215SStefan Weinhuber dasd_alias_handle_summary_unit_check(device, irb); 15198e09f215SStefan Weinhuber return; 15208e09f215SStefan Weinhuber } 15218e09f215SStefan Weinhuber 1522f60c768cSStefan Haberland 1523f60c768cSStefan Haberland /* service information message SIM */ 152450afd20fSStefan Haberland if (irb->esw.esw0.erw.cons && !(irb->ecw[27] & DASD_SENSE_BIT_0) && 15259d853cafSStefan Haberland ((irb->ecw[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 1526f60c768cSStefan Haberland dasd_3990_erp_handle_sim(device, irb->ecw); 15279d853cafSStefan Haberland dasd_schedule_device_bh(device); 1528f60c768cSStefan Haberland return; 1529f60c768cSStefan Haberland } 1530f60c768cSStefan Haberland 1531ada3df91SStefan Haberland if ((irb->scsw.cmd.cc == 1) && 1532ada3df91SStefan Haberland (irb->scsw.cmd.fctl & SCSW_FCTL_START_FUNC) && 1533ada3df91SStefan Haberland (irb->scsw.cmd.actl & SCSW_ACTL_START_PEND) && 1534ada3df91SStefan Haberland (irb->scsw.cmd.stctl & SCSW_STCTL_STATUS_PEND)) { 1535ada3df91SStefan Haberland /* fake irb do nothing, they are handled elsewhere */ 15368e09f215SStefan Weinhuber dasd_schedule_device_bh(device); 1537ada3df91SStefan Haberland return; 1538ada3df91SStefan Haberland } 15398e09f215SStefan Weinhuber 1540ada3df91SStefan Haberland if (!(irb->esw.esw0.erw.cons)) { 1541ada3df91SStefan Haberland /* just report other unsolicited interrupts */ 1542ada3df91SStefan Haberland DEV_MESSAGE(KERN_ERR, device, "%s", 1543ada3df91SStefan Haberland "unsolicited interrupt received"); 1544ada3df91SStefan Haberland } else { 1545ada3df91SStefan Haberland DEV_MESSAGE(KERN_ERR, device, "%s", 1546ada3df91SStefan Haberland "unsolicited interrupt received " 1547ada3df91SStefan Haberland "(sense available)"); 1548ada3df91SStefan Haberland device->discipline->dump_sense(device, NULL, irb); 1549ada3df91SStefan Haberland } 1550ada3df91SStefan Haberland 1551ada3df91SStefan Haberland dasd_schedule_device_bh(device); 15528e09f215SStefan Weinhuber return; 15538e09f215SStefan Weinhuber }; 15548e09f215SStefan Weinhuber 15558e09f215SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 15568e09f215SStefan Weinhuber struct dasd_block *block, 15578e09f215SStefan Weinhuber struct request *req) 15581da177e4SLinus Torvalds { 15591da177e4SLinus Torvalds struct dasd_eckd_private *private; 15601da177e4SLinus Torvalds unsigned long *idaws; 15611da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 15621da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 15631da177e4SLinus Torvalds struct ccw1 *ccw; 15645705f702SNeilBrown struct req_iterator iter; 15651da177e4SLinus Torvalds struct bio_vec *bv; 15661da177e4SLinus Torvalds char *dst; 15671da177e4SLinus Torvalds unsigned int blksize, blk_per_trk, off; 15681da177e4SLinus Torvalds int count, cidaw, cplength, datasize; 15691da177e4SLinus Torvalds sector_t recid, first_rec, last_rec; 15701da177e4SLinus Torvalds sector_t first_trk, last_trk; 15711da177e4SLinus Torvalds unsigned int first_offs, last_offs; 15721da177e4SLinus Torvalds unsigned char cmd, rcmd; 15738e09f215SStefan Weinhuber int use_prefix; 15748e09f215SStefan Weinhuber struct dasd_device *basedev; 15751da177e4SLinus Torvalds 15768e09f215SStefan Weinhuber basedev = block->base; 15778e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 15781da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 15791da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_READ_MT; 15801da177e4SLinus Torvalds else if (rq_data_dir(req) == WRITE) 15811da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_WRITE_MT; 15821da177e4SLinus Torvalds else 15831da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 15841da177e4SLinus Torvalds /* Calculate number of blocks/records per track. */ 15858e09f215SStefan Weinhuber blksize = block->bp_block; 15861da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 15871da177e4SLinus Torvalds /* Calculate record id of first and last block. */ 15888e09f215SStefan Weinhuber first_rec = first_trk = req->sector >> block->s2b_shift; 15891da177e4SLinus Torvalds first_offs = sector_div(first_trk, blk_per_trk); 15901da177e4SLinus Torvalds last_rec = last_trk = 15918e09f215SStefan Weinhuber (req->sector + req->nr_sectors - 1) >> block->s2b_shift; 15921da177e4SLinus Torvalds last_offs = sector_div(last_trk, blk_per_trk); 15931da177e4SLinus Torvalds /* Check struct bio and count the number of blocks for the request. */ 15941da177e4SLinus Torvalds count = 0; 15951da177e4SLinus Torvalds cidaw = 0; 15965705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 15971da177e4SLinus Torvalds if (bv->bv_len & (blksize - 1)) 15981da177e4SLinus Torvalds /* Eckd can only do full blocks. */ 15991da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 16008e09f215SStefan Weinhuber count += bv->bv_len >> (block->s2b_shift + 9); 1601347a8dc3SMartin Schwidefsky #if defined(CONFIG_64BIT) 16026c92e699SJens Axboe if (idal_is_needed (page_address(bv->bv_page), bv->bv_len)) 16038e09f215SStefan Weinhuber cidaw += bv->bv_len >> (block->s2b_shift + 9); 16041da177e4SLinus Torvalds #endif 16051da177e4SLinus Torvalds } 16061da177e4SLinus Torvalds /* Paranoia. */ 16071da177e4SLinus Torvalds if (count != last_rec - first_rec + 1) 16081da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 16098e09f215SStefan Weinhuber 16108e09f215SStefan Weinhuber /* use the prefix command if available */ 16118e09f215SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 16128e09f215SStefan Weinhuber if (use_prefix) { 16138e09f215SStefan Weinhuber /* 1x prefix + number of blocks */ 16148e09f215SStefan Weinhuber cplength = 2 + count; 16158e09f215SStefan Weinhuber /* 1x prefix + cidaws*sizeof(long) */ 16168e09f215SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 16178e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 16188e09f215SStefan Weinhuber cidaw * sizeof(unsigned long); 16198e09f215SStefan Weinhuber } else { 16201da177e4SLinus Torvalds /* 1x define extent + 1x locate record + number of blocks */ 16211da177e4SLinus Torvalds cplength = 2 + count; 16221da177e4SLinus Torvalds /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 16238e09f215SStefan Weinhuber datasize = sizeof(struct DE_eckd_data) + 16248e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 16251da177e4SLinus Torvalds cidaw * sizeof(unsigned long); 16268e09f215SStefan Weinhuber } 16271da177e4SLinus Torvalds /* Find out the number of additional locate record ccws for cdl. */ 16281da177e4SLinus Torvalds if (private->uses_cdl && first_rec < 2*blk_per_trk) { 16291da177e4SLinus Torvalds if (last_rec >= 2*blk_per_trk) 16301da177e4SLinus Torvalds count = 2*blk_per_trk - first_rec; 16311da177e4SLinus Torvalds cplength += count; 16321da177e4SLinus Torvalds datasize += count*sizeof(struct LO_eckd_data); 16331da177e4SLinus Torvalds } 16341da177e4SLinus Torvalds /* Allocate the ccw request. */ 16351da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 16368e09f215SStefan Weinhuber cplength, datasize, startdev); 16371da177e4SLinus Torvalds if (IS_ERR(cqr)) 16381da177e4SLinus Torvalds return cqr; 16391da177e4SLinus Torvalds ccw = cqr->cpaddr; 16408e09f215SStefan Weinhuber /* First ccw is define extent or prefix. */ 16418e09f215SStefan Weinhuber if (use_prefix) { 16428e09f215SStefan Weinhuber if (prefix(ccw++, cqr->data, first_trk, 16438e09f215SStefan Weinhuber last_trk, cmd, basedev, startdev) == -EAGAIN) { 16448e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 16458e09f215SStefan Weinhuber * Try again later. 16468e09f215SStefan Weinhuber */ 16478e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 1648d54853efSMartin Schwidefsky return ERR_PTR(-EAGAIN); 1649d54853efSMartin Schwidefsky } 16508e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 16518e09f215SStefan Weinhuber sizeof(struct PFX_eckd_data)); 16528e09f215SStefan Weinhuber } else { 16538e09f215SStefan Weinhuber if (define_extent(ccw++, cqr->data, first_trk, 16548e09f215SStefan Weinhuber last_trk, cmd, startdev) == -EAGAIN) { 16558e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 16568e09f215SStefan Weinhuber * Try again later. 16578e09f215SStefan Weinhuber */ 16588e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 16598e09f215SStefan Weinhuber return ERR_PTR(-EAGAIN); 16608e09f215SStefan Weinhuber } 16618e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 16628e09f215SStefan Weinhuber sizeof(struct DE_eckd_data)); 16638e09f215SStefan Weinhuber } 16641da177e4SLinus Torvalds /* Build locate_record+read/write/ccws. */ 16651da177e4SLinus Torvalds LO_data = (struct LO_eckd_data *) (idaws + cidaw); 16661da177e4SLinus Torvalds recid = first_rec; 16671da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 16681da177e4SLinus Torvalds /* Only standard blocks so there is just one locate record. */ 16691da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 16701da177e4SLinus Torvalds locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 16718e09f215SStefan Weinhuber last_rec - recid + 1, cmd, basedev, blksize); 16721da177e4SLinus Torvalds } 16735705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 16741da177e4SLinus Torvalds dst = page_address(bv->bv_page) + bv->bv_offset; 16751da177e4SLinus Torvalds if (dasd_page_cache) { 16761da177e4SLinus Torvalds char *copy = kmem_cache_alloc(dasd_page_cache, 1677441e143eSChristoph Lameter GFP_DMA | __GFP_NOWARN); 16781da177e4SLinus Torvalds if (copy && rq_data_dir(req) == WRITE) 16791da177e4SLinus Torvalds memcpy(copy + bv->bv_offset, dst, bv->bv_len); 16801da177e4SLinus Torvalds if (copy) 16811da177e4SLinus Torvalds dst = copy + bv->bv_offset; 16821da177e4SLinus Torvalds } 16831da177e4SLinus Torvalds for (off = 0; off < bv->bv_len; off += blksize) { 16841da177e4SLinus Torvalds sector_t trkid = recid; 16851da177e4SLinus Torvalds unsigned int recoffs = sector_div(trkid, blk_per_trk); 16861da177e4SLinus Torvalds rcmd = cmd; 16871da177e4SLinus Torvalds count = blksize; 16881da177e4SLinus Torvalds /* Locate record for cdl special block ? */ 16891da177e4SLinus Torvalds if (private->uses_cdl && recid < 2*blk_per_trk) { 16901da177e4SLinus Torvalds if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 16911da177e4SLinus Torvalds rcmd |= 0x8; 16921da177e4SLinus Torvalds count = dasd_eckd_cdl_reclen(recid); 1693ec5883abSHorst Hummel if (count < blksize && 1694ec5883abSHorst Hummel rq_data_dir(req) == READ) 16951da177e4SLinus Torvalds memset(dst + count, 0xe5, 16961da177e4SLinus Torvalds blksize - count); 16971da177e4SLinus Torvalds } 16981da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 16991da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 17001da177e4SLinus Torvalds trkid, recoffs + 1, 17018e09f215SStefan Weinhuber 1, rcmd, basedev, count); 17021da177e4SLinus Torvalds } 17031da177e4SLinus Torvalds /* Locate record for standard blocks ? */ 17041da177e4SLinus Torvalds if (private->uses_cdl && recid == 2*blk_per_trk) { 17051da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 17061da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 17071da177e4SLinus Torvalds trkid, recoffs + 1, 17081da177e4SLinus Torvalds last_rec - recid + 1, 17098e09f215SStefan Weinhuber cmd, basedev, count); 17101da177e4SLinus Torvalds } 17111da177e4SLinus Torvalds /* Read/write ccw. */ 17121da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 17131da177e4SLinus Torvalds ccw->cmd_code = rcmd; 17141da177e4SLinus Torvalds ccw->count = count; 17151da177e4SLinus Torvalds if (idal_is_needed(dst, blksize)) { 17161da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) idaws; 17171da177e4SLinus Torvalds ccw->flags = CCW_FLAG_IDA; 17181da177e4SLinus Torvalds idaws = idal_create_words(idaws, dst, blksize); 17191da177e4SLinus Torvalds } else { 17201da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) dst; 17211da177e4SLinus Torvalds ccw->flags = 0; 17221da177e4SLinus Torvalds } 17231da177e4SLinus Torvalds ccw++; 17241da177e4SLinus Torvalds dst += blksize; 17251da177e4SLinus Torvalds recid++; 17261da177e4SLinus Torvalds } 17271da177e4SLinus Torvalds } 172813de227bSHolger Smolinski if (blk_noretry_request(req) || 172913de227bSHolger Smolinski block->base->features & DASD_FEATURE_FAILFAST) 17301c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 17318e09f215SStefan Weinhuber cqr->startdev = startdev; 17328e09f215SStefan Weinhuber cqr->memdev = startdev; 17338e09f215SStefan Weinhuber cqr->block = block; 17341da177e4SLinus Torvalds cqr->expires = 5 * 60 * HZ; /* 5 minutes */ 17351da177e4SLinus Torvalds cqr->lpm = private->path_data.ppm; 17361da177e4SLinus Torvalds cqr->retries = 256; 17371da177e4SLinus Torvalds cqr->buildclk = get_clock(); 17381da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 17391da177e4SLinus Torvalds return cqr; 17401da177e4SLinus Torvalds } 17411da177e4SLinus Torvalds 17421da177e4SLinus Torvalds static int 17431da177e4SLinus Torvalds dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 17441da177e4SLinus Torvalds { 17451da177e4SLinus Torvalds struct dasd_eckd_private *private; 17461da177e4SLinus Torvalds struct ccw1 *ccw; 17475705f702SNeilBrown struct req_iterator iter; 17481da177e4SLinus Torvalds struct bio_vec *bv; 17491da177e4SLinus Torvalds char *dst, *cda; 17501da177e4SLinus Torvalds unsigned int blksize, blk_per_trk, off; 17511da177e4SLinus Torvalds sector_t recid; 17525705f702SNeilBrown int status; 17531da177e4SLinus Torvalds 17541da177e4SLinus Torvalds if (!dasd_page_cache) 17551da177e4SLinus Torvalds goto out; 17568e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) cqr->block->base->private; 17578e09f215SStefan Weinhuber blksize = cqr->block->bp_block; 17581da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 17598e09f215SStefan Weinhuber recid = req->sector >> cqr->block->s2b_shift; 17601da177e4SLinus Torvalds ccw = cqr->cpaddr; 17611da177e4SLinus Torvalds /* Skip over define extent & locate record. */ 17621da177e4SLinus Torvalds ccw++; 17631da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 17641da177e4SLinus Torvalds ccw++; 17655705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 17661da177e4SLinus Torvalds dst = page_address(bv->bv_page) + bv->bv_offset; 17671da177e4SLinus Torvalds for (off = 0; off < bv->bv_len; off += blksize) { 17681da177e4SLinus Torvalds /* Skip locate record. */ 17691da177e4SLinus Torvalds if (private->uses_cdl && recid <= 2*blk_per_trk) 17701da177e4SLinus Torvalds ccw++; 17711da177e4SLinus Torvalds if (dst) { 17721da177e4SLinus Torvalds if (ccw->flags & CCW_FLAG_IDA) 17731da177e4SLinus Torvalds cda = *((char **)((addr_t) ccw->cda)); 17741da177e4SLinus Torvalds else 17751da177e4SLinus Torvalds cda = (char *)((addr_t) ccw->cda); 17761da177e4SLinus Torvalds if (dst != cda) { 17771da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 17781da177e4SLinus Torvalds memcpy(dst, cda, bv->bv_len); 17791da177e4SLinus Torvalds kmem_cache_free(dasd_page_cache, 17801da177e4SLinus Torvalds (void *)((addr_t)cda & PAGE_MASK)); 17811da177e4SLinus Torvalds } 17821da177e4SLinus Torvalds dst = NULL; 17831da177e4SLinus Torvalds } 17841da177e4SLinus Torvalds ccw++; 17851da177e4SLinus Torvalds recid++; 17861da177e4SLinus Torvalds } 17871da177e4SLinus Torvalds } 17881da177e4SLinus Torvalds out: 17891da177e4SLinus Torvalds status = cqr->status == DASD_CQR_DONE; 17908e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 17911da177e4SLinus Torvalds return status; 17921da177e4SLinus Torvalds } 17931da177e4SLinus Torvalds 17948e09f215SStefan Weinhuber /* 17958e09f215SStefan Weinhuber * Modify ccw chain in cqr so it can be started on a base device. 17968e09f215SStefan Weinhuber * 17978e09f215SStefan Weinhuber * Note that this is not enough to restart the cqr! 17988e09f215SStefan Weinhuber * Either reset cqr->startdev as well (summary unit check handling) 17998e09f215SStefan Weinhuber * or restart via separate cqr (as in ERP handling). 18008e09f215SStefan Weinhuber */ 18018e09f215SStefan Weinhuber void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 18028e09f215SStefan Weinhuber { 18038e09f215SStefan Weinhuber struct ccw1 *ccw; 18048e09f215SStefan Weinhuber struct PFX_eckd_data *pfxdata; 18058e09f215SStefan Weinhuber 18068e09f215SStefan Weinhuber ccw = cqr->cpaddr; 18078e09f215SStefan Weinhuber pfxdata = cqr->data; 18088e09f215SStefan Weinhuber 18098e09f215SStefan Weinhuber if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 18108e09f215SStefan Weinhuber pfxdata->validity.verify_base = 0; 18118e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 18128e09f215SStefan Weinhuber } 18138e09f215SStefan Weinhuber } 18148e09f215SStefan Weinhuber 18158e09f215SStefan Weinhuber #define DASD_ECKD_CHANQ_MAX_SIZE 4 18168e09f215SStefan Weinhuber 18178e09f215SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 18188e09f215SStefan Weinhuber struct dasd_block *block, 18198e09f215SStefan Weinhuber struct request *req) 18208e09f215SStefan Weinhuber { 18218e09f215SStefan Weinhuber struct dasd_eckd_private *private; 18228e09f215SStefan Weinhuber struct dasd_device *startdev; 18238e09f215SStefan Weinhuber unsigned long flags; 18248e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 18258e09f215SStefan Weinhuber 18268e09f215SStefan Weinhuber startdev = dasd_alias_get_start_dev(base); 18278e09f215SStefan Weinhuber if (!startdev) 18288e09f215SStefan Weinhuber startdev = base; 18298e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) startdev->private; 18308e09f215SStefan Weinhuber if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 18318e09f215SStefan Weinhuber return ERR_PTR(-EBUSY); 18328e09f215SStefan Weinhuber 18338e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 18348e09f215SStefan Weinhuber private->count++; 18358e09f215SStefan Weinhuber cqr = dasd_eckd_build_cp(startdev, block, req); 18368e09f215SStefan Weinhuber if (IS_ERR(cqr)) 18378e09f215SStefan Weinhuber private->count--; 18388e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 18398e09f215SStefan Weinhuber return cqr; 18408e09f215SStefan Weinhuber } 18418e09f215SStefan Weinhuber 18428e09f215SStefan Weinhuber static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 18438e09f215SStefan Weinhuber struct request *req) 18448e09f215SStefan Weinhuber { 18458e09f215SStefan Weinhuber struct dasd_eckd_private *private; 18468e09f215SStefan Weinhuber unsigned long flags; 18478e09f215SStefan Weinhuber 18488e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 18498e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) cqr->memdev->private; 18508e09f215SStefan Weinhuber private->count--; 18518e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 18528e09f215SStefan Weinhuber return dasd_eckd_free_cp(cqr, req); 18538e09f215SStefan Weinhuber } 18548e09f215SStefan Weinhuber 18551da177e4SLinus Torvalds static int 18561da177e4SLinus Torvalds dasd_eckd_fill_info(struct dasd_device * device, 18571da177e4SLinus Torvalds struct dasd_information2_t * info) 18581da177e4SLinus Torvalds { 18591da177e4SLinus Torvalds struct dasd_eckd_private *private; 18601da177e4SLinus Torvalds 18611da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 18621da177e4SLinus Torvalds info->label_block = 2; 18631da177e4SLinus Torvalds info->FBA_layout = private->uses_cdl ? 0 : 1; 18641da177e4SLinus Torvalds info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 18651da177e4SLinus Torvalds info->characteristics_size = sizeof(struct dasd_eckd_characteristics); 18661da177e4SLinus Torvalds memcpy(info->characteristics, &private->rdc_data, 18671da177e4SLinus Torvalds sizeof(struct dasd_eckd_characteristics)); 18684abb08c2SStefan Weinhuber info->confdata_size = min((unsigned long)private->conf_len, 18694abb08c2SStefan Weinhuber sizeof(info->configuration_data)); 18704abb08c2SStefan Weinhuber memcpy(info->configuration_data, private->conf_data, 18714abb08c2SStefan Weinhuber info->confdata_size); 18721da177e4SLinus Torvalds return 0; 18731da177e4SLinus Torvalds } 18741da177e4SLinus Torvalds 18751da177e4SLinus Torvalds /* 18761da177e4SLinus Torvalds * SECTION: ioctl functions for eckd devices. 18771da177e4SLinus Torvalds */ 18781da177e4SLinus Torvalds 18791da177e4SLinus Torvalds /* 18801da177e4SLinus Torvalds * Release device ioctl. 18811da177e4SLinus Torvalds * Buils a channel programm to releases a prior reserved 18821da177e4SLinus Torvalds * (see dasd_eckd_reserve) device. 18831da177e4SLinus Torvalds */ 18841da177e4SLinus Torvalds static int 18851107ccfbSChristoph Hellwig dasd_eckd_release(struct dasd_device *device) 18861da177e4SLinus Torvalds { 18871da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 18881da177e4SLinus Torvalds int rc; 18891da177e4SLinus Torvalds 18901da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 18911da177e4SLinus Torvalds return -EACCES; 18921da177e4SLinus Torvalds 18931da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 18941da177e4SLinus Torvalds 1, 32, device); 18951da177e4SLinus Torvalds if (IS_ERR(cqr)) { 18961da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 18971da177e4SLinus Torvalds "Could not allocate initialization request"); 18981da177e4SLinus Torvalds return PTR_ERR(cqr); 18991da177e4SLinus Torvalds } 19001da177e4SLinus Torvalds cqr->cpaddr->cmd_code = DASD_ECKD_CCW_RELEASE; 19011da177e4SLinus Torvalds cqr->cpaddr->flags |= CCW_FLAG_SLI; 19021da177e4SLinus Torvalds cqr->cpaddr->count = 32; 19031da177e4SLinus Torvalds cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; 19048e09f215SStefan Weinhuber cqr->startdev = device; 19058e09f215SStefan Weinhuber cqr->memdev = device; 19061da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 19071c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 1908336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 19091da177e4SLinus Torvalds cqr->expires = 2 * HZ; 19101da177e4SLinus Torvalds cqr->buildclk = get_clock(); 19111da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 19121da177e4SLinus Torvalds 19131da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 19141da177e4SLinus Torvalds 19158e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 19161da177e4SLinus Torvalds return rc; 19171da177e4SLinus Torvalds } 19181da177e4SLinus Torvalds 19191da177e4SLinus Torvalds /* 19201da177e4SLinus Torvalds * Reserve device ioctl. 19211da177e4SLinus Torvalds * Options are set to 'synchronous wait for interrupt' and 19221da177e4SLinus Torvalds * 'timeout the request'. This leads to a terminate IO if 19231da177e4SLinus Torvalds * the interrupt is outstanding for a certain time. 19241da177e4SLinus Torvalds */ 19251da177e4SLinus Torvalds static int 19261107ccfbSChristoph Hellwig dasd_eckd_reserve(struct dasd_device *device) 19271da177e4SLinus Torvalds { 19281da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 19291da177e4SLinus Torvalds int rc; 19301da177e4SLinus Torvalds 19311da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 19321da177e4SLinus Torvalds return -EACCES; 19331da177e4SLinus Torvalds 19341da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 19351da177e4SLinus Torvalds 1, 32, device); 19361da177e4SLinus Torvalds if (IS_ERR(cqr)) { 19371da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 19381da177e4SLinus Torvalds "Could not allocate initialization request"); 19391da177e4SLinus Torvalds return PTR_ERR(cqr); 19401da177e4SLinus Torvalds } 19411da177e4SLinus Torvalds cqr->cpaddr->cmd_code = DASD_ECKD_CCW_RESERVE; 19421da177e4SLinus Torvalds cqr->cpaddr->flags |= CCW_FLAG_SLI; 19431da177e4SLinus Torvalds cqr->cpaddr->count = 32; 19441da177e4SLinus Torvalds cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; 19458e09f215SStefan Weinhuber cqr->startdev = device; 19468e09f215SStefan Weinhuber cqr->memdev = device; 19471da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 19481c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 1949336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 19501da177e4SLinus Torvalds cqr->expires = 2 * HZ; 19511da177e4SLinus Torvalds cqr->buildclk = get_clock(); 19521da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 19531da177e4SLinus Torvalds 19541da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 19551da177e4SLinus Torvalds 19568e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 19571da177e4SLinus Torvalds return rc; 19581da177e4SLinus Torvalds } 19591da177e4SLinus Torvalds 19601da177e4SLinus Torvalds /* 19611da177e4SLinus Torvalds * Steal lock ioctl - unconditional reserve device. 19621da177e4SLinus Torvalds * Buils a channel programm to break a device's reservation. 19631da177e4SLinus Torvalds * (unconditional reserve) 19641da177e4SLinus Torvalds */ 19651da177e4SLinus Torvalds static int 19661107ccfbSChristoph Hellwig dasd_eckd_steal_lock(struct dasd_device *device) 19671da177e4SLinus Torvalds { 19681da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 19691da177e4SLinus Torvalds int rc; 19701da177e4SLinus Torvalds 19711da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 19721da177e4SLinus Torvalds return -EACCES; 19731da177e4SLinus Torvalds 19741da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 19751da177e4SLinus Torvalds 1, 32, device); 19761da177e4SLinus Torvalds if (IS_ERR(cqr)) { 19771da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 19781da177e4SLinus Torvalds "Could not allocate initialization request"); 19791da177e4SLinus Torvalds return PTR_ERR(cqr); 19801da177e4SLinus Torvalds } 19811da177e4SLinus Torvalds cqr->cpaddr->cmd_code = DASD_ECKD_CCW_SLCK; 19821da177e4SLinus Torvalds cqr->cpaddr->flags |= CCW_FLAG_SLI; 19831da177e4SLinus Torvalds cqr->cpaddr->count = 32; 19841da177e4SLinus Torvalds cqr->cpaddr->cda = (__u32)(addr_t) cqr->data; 19858e09f215SStefan Weinhuber cqr->startdev = device; 19868e09f215SStefan Weinhuber cqr->memdev = device; 19871da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 19881c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 1989336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 19901da177e4SLinus Torvalds cqr->expires = 2 * HZ; 19911da177e4SLinus Torvalds cqr->buildclk = get_clock(); 19921da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 19931da177e4SLinus Torvalds 19941da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 19951da177e4SLinus Torvalds 19968e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 19971da177e4SLinus Torvalds return rc; 19981da177e4SLinus Torvalds } 19991da177e4SLinus Torvalds 20001da177e4SLinus Torvalds /* 20011da177e4SLinus Torvalds * Read performance statistics 20021da177e4SLinus Torvalds */ 20031da177e4SLinus Torvalds static int 20041107ccfbSChristoph Hellwig dasd_eckd_performance(struct dasd_device *device, void __user *argp) 20051da177e4SLinus Torvalds { 20061da177e4SLinus Torvalds struct dasd_psf_prssd_data *prssdp; 20071da177e4SLinus Torvalds struct dasd_rssd_perf_stats_t *stats; 20081da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 20091da177e4SLinus Torvalds struct ccw1 *ccw; 20101da177e4SLinus Torvalds int rc; 20111da177e4SLinus Torvalds 20121da177e4SLinus Torvalds cqr = dasd_smalloc_request(dasd_eckd_discipline.name, 20131da177e4SLinus Torvalds 1 /* PSF */ + 1 /* RSSD */ , 20141da177e4SLinus Torvalds (sizeof(struct dasd_psf_prssd_data) + 20151da177e4SLinus Torvalds sizeof(struct dasd_rssd_perf_stats_t)), 20161da177e4SLinus Torvalds device); 20171da177e4SLinus Torvalds if (IS_ERR(cqr)) { 20181da177e4SLinus Torvalds DEV_MESSAGE(KERN_WARNING, device, "%s", 20191da177e4SLinus Torvalds "Could not allocate initialization request"); 20201da177e4SLinus Torvalds return PTR_ERR(cqr); 20211da177e4SLinus Torvalds } 20228e09f215SStefan Weinhuber cqr->startdev = device; 20238e09f215SStefan Weinhuber cqr->memdev = device; 20241da177e4SLinus Torvalds cqr->retries = 0; 20251da177e4SLinus Torvalds cqr->expires = 10 * HZ; 20261da177e4SLinus Torvalds 20271da177e4SLinus Torvalds /* Prepare for Read Subsystem Data */ 20281da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 20291da177e4SLinus Torvalds memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 20301da177e4SLinus Torvalds prssdp->order = PSF_ORDER_PRSSD; 20315d67d164SJoe Perches prssdp->suborder = 0x01; /* Performance Statistics */ 20321da177e4SLinus Torvalds prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 20331da177e4SLinus Torvalds 20341da177e4SLinus Torvalds ccw = cqr->cpaddr; 20351da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_PSF; 20361da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_psf_prssd_data); 20371da177e4SLinus Torvalds ccw->flags |= CCW_FLAG_CC; 20381da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) prssdp; 20391da177e4SLinus Torvalds 20401da177e4SLinus Torvalds /* Read Subsystem Data - Performance Statistics */ 20411da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 20421da177e4SLinus Torvalds memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 20431da177e4SLinus Torvalds 20441da177e4SLinus Torvalds ccw++; 20451da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_RSSD; 20461da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 20471da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) stats; 20481da177e4SLinus Torvalds 20491da177e4SLinus Torvalds cqr->buildclk = get_clock(); 20501da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 20511da177e4SLinus Torvalds rc = dasd_sleep_on(cqr); 20521da177e4SLinus Torvalds if (rc == 0) { 20531da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 20541da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 20551107ccfbSChristoph Hellwig if (copy_to_user(argp, stats, 20561107ccfbSChristoph Hellwig sizeof(struct dasd_rssd_perf_stats_t))) 20571107ccfbSChristoph Hellwig rc = -EFAULT; 20581da177e4SLinus Torvalds } 20598e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 20601da177e4SLinus Torvalds return rc; 20611da177e4SLinus Torvalds } 20621da177e4SLinus Torvalds 20631da177e4SLinus Torvalds /* 20641da177e4SLinus Torvalds * Get attributes (cache operations) 20651da177e4SLinus Torvalds * Returnes the cache attributes used in Define Extend (DE). 20661da177e4SLinus Torvalds */ 20671da177e4SLinus Torvalds static int 20681107ccfbSChristoph Hellwig dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 20691da177e4SLinus Torvalds { 20701107ccfbSChristoph Hellwig struct dasd_eckd_private *private = 20711107ccfbSChristoph Hellwig (struct dasd_eckd_private *)device->private; 20721107ccfbSChristoph Hellwig struct attrib_data_t attrib = private->attrib; 20731da177e4SLinus Torvalds int rc; 20741da177e4SLinus Torvalds 20751da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 20761da177e4SLinus Torvalds return -EACCES; 20771107ccfbSChristoph Hellwig if (!argp) 20781da177e4SLinus Torvalds return -EINVAL; 20791da177e4SLinus Torvalds 20801107ccfbSChristoph Hellwig rc = 0; 20811107ccfbSChristoph Hellwig if (copy_to_user(argp, (long *) &attrib, 20821107ccfbSChristoph Hellwig sizeof(struct attrib_data_t))) 20831107ccfbSChristoph Hellwig rc = -EFAULT; 20841da177e4SLinus Torvalds 20851da177e4SLinus Torvalds return rc; 20861da177e4SLinus Torvalds } 20871da177e4SLinus Torvalds 20881da177e4SLinus Torvalds /* 20891da177e4SLinus Torvalds * Set attributes (cache operations) 20901da177e4SLinus Torvalds * Stores the attributes for cache operation to be used in Define Extend (DE). 20911da177e4SLinus Torvalds */ 20921da177e4SLinus Torvalds static int 20931107ccfbSChristoph Hellwig dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 20941da177e4SLinus Torvalds { 20951107ccfbSChristoph Hellwig struct dasd_eckd_private *private = 20961107ccfbSChristoph Hellwig (struct dasd_eckd_private *)device->private; 20971da177e4SLinus Torvalds struct attrib_data_t attrib; 20981da177e4SLinus Torvalds 20991da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 21001da177e4SLinus Torvalds return -EACCES; 21011107ccfbSChristoph Hellwig if (!argp) 21021da177e4SLinus Torvalds return -EINVAL; 21031da177e4SLinus Torvalds 21041107ccfbSChristoph Hellwig if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 21051da177e4SLinus Torvalds return -EFAULT; 21061da177e4SLinus Torvalds private->attrib = attrib; 21071da177e4SLinus Torvalds 21081da177e4SLinus Torvalds DEV_MESSAGE(KERN_INFO, device, 21091da177e4SLinus Torvalds "cache operation mode set to %x (%i cylinder prestage)", 21101da177e4SLinus Torvalds private->attrib.operation, private->attrib.nr_cyl); 21111da177e4SLinus Torvalds return 0; 21121da177e4SLinus Torvalds } 21131da177e4SLinus Torvalds 2114ab1d848fSNigel Hislop /* 2115ab1d848fSNigel Hislop * Issue syscall I/O to EMC Symmetrix array. 2116ab1d848fSNigel Hislop * CCWs are PSF and RSSD 2117ab1d848fSNigel Hislop */ 2118ab1d848fSNigel Hislop static int dasd_symm_io(struct dasd_device *device, void __user *argp) 2119ab1d848fSNigel Hislop { 2120ab1d848fSNigel Hislop struct dasd_symmio_parms usrparm; 2121ab1d848fSNigel Hislop char *psf_data, *rssd_result; 2122ab1d848fSNigel Hislop struct dasd_ccw_req *cqr; 2123ab1d848fSNigel Hislop struct ccw1 *ccw; 2124ab1d848fSNigel Hislop int rc; 2125ab1d848fSNigel Hislop 2126ab1d848fSNigel Hislop /* Copy parms from caller */ 2127ab1d848fSNigel Hislop rc = -EFAULT; 2128ab1d848fSNigel Hislop if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 2129ab1d848fSNigel Hislop goto out; 2130ab1d848fSNigel Hislop #ifndef CONFIG_64BIT 2131ab1d848fSNigel Hislop /* Make sure pointers are sane even on 31 bit. */ 2132ab1d848fSNigel Hislop if ((usrparm.psf_data >> 32) != 0 || (usrparm.rssd_result >> 32) != 0) { 2133ab1d848fSNigel Hislop rc = -EINVAL; 2134ab1d848fSNigel Hislop goto out; 2135ab1d848fSNigel Hislop } 2136ab1d848fSNigel Hislop #endif 2137ab1d848fSNigel Hislop /* alloc I/O data area */ 2138ab1d848fSNigel Hislop psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 2139ab1d848fSNigel Hislop rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 2140ab1d848fSNigel Hislop if (!psf_data || !rssd_result) { 2141ab1d848fSNigel Hislop rc = -ENOMEM; 2142ab1d848fSNigel Hislop goto out_free; 2143ab1d848fSNigel Hislop } 2144ab1d848fSNigel Hislop 2145ab1d848fSNigel Hislop /* get syscall header from user space */ 2146ab1d848fSNigel Hislop rc = -EFAULT; 2147ab1d848fSNigel Hislop if (copy_from_user(psf_data, 2148ab1d848fSNigel Hislop (void __user *)(unsigned long) usrparm.psf_data, 2149ab1d848fSNigel Hislop usrparm.psf_data_len)) 2150ab1d848fSNigel Hislop goto out_free; 2151ab1d848fSNigel Hislop 2152ab1d848fSNigel Hislop /* sanity check on syscall header */ 2153ab1d848fSNigel Hislop if (psf_data[0] != 0x17 && psf_data[1] != 0xce) { 2154ab1d848fSNigel Hislop rc = -EINVAL; 2155ab1d848fSNigel Hislop goto out_free; 2156ab1d848fSNigel Hislop } 2157ab1d848fSNigel Hislop 2158ab1d848fSNigel Hislop /* setup CCWs for PSF + RSSD */ 2159ab1d848fSNigel Hislop cqr = dasd_smalloc_request("ECKD", 2 , 0, device); 2160ab1d848fSNigel Hislop if (IS_ERR(cqr)) { 2161ab1d848fSNigel Hislop DEV_MESSAGE(KERN_WARNING, device, "%s", 2162ab1d848fSNigel Hislop "Could not allocate initialization request"); 2163ab1d848fSNigel Hislop rc = PTR_ERR(cqr); 2164ab1d848fSNigel Hislop goto out_free; 2165ab1d848fSNigel Hislop } 2166ab1d848fSNigel Hislop 2167ab1d848fSNigel Hislop cqr->startdev = device; 2168ab1d848fSNigel Hislop cqr->memdev = device; 2169ab1d848fSNigel Hislop cqr->retries = 3; 2170ab1d848fSNigel Hislop cqr->expires = 10 * HZ; 2171ab1d848fSNigel Hislop cqr->buildclk = get_clock(); 2172ab1d848fSNigel Hislop cqr->status = DASD_CQR_FILLED; 2173ab1d848fSNigel Hislop 2174ab1d848fSNigel Hislop /* Build the ccws */ 2175ab1d848fSNigel Hislop ccw = cqr->cpaddr; 2176ab1d848fSNigel Hislop 2177ab1d848fSNigel Hislop /* PSF ccw */ 2178ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_PSF; 2179ab1d848fSNigel Hislop ccw->count = usrparm.psf_data_len; 2180ab1d848fSNigel Hislop ccw->flags |= CCW_FLAG_CC; 2181ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) psf_data; 2182ab1d848fSNigel Hislop 2183ab1d848fSNigel Hislop ccw++; 2184ab1d848fSNigel Hislop 2185ab1d848fSNigel Hislop /* RSSD ccw */ 2186ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_RSSD; 2187ab1d848fSNigel Hislop ccw->count = usrparm.rssd_result_len; 2188ab1d848fSNigel Hislop ccw->flags = CCW_FLAG_SLI ; 2189ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) rssd_result; 2190ab1d848fSNigel Hislop 2191ab1d848fSNigel Hislop rc = dasd_sleep_on(cqr); 2192ab1d848fSNigel Hislop if (rc) 2193ab1d848fSNigel Hislop goto out_sfree; 2194ab1d848fSNigel Hislop 2195ab1d848fSNigel Hislop rc = -EFAULT; 2196ab1d848fSNigel Hislop if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 2197ab1d848fSNigel Hislop rssd_result, usrparm.rssd_result_len)) 2198ab1d848fSNigel Hislop goto out_sfree; 2199ab1d848fSNigel Hislop rc = 0; 2200ab1d848fSNigel Hislop 2201ab1d848fSNigel Hislop out_sfree: 2202ab1d848fSNigel Hislop dasd_sfree_request(cqr, cqr->memdev); 2203ab1d848fSNigel Hislop out_free: 2204ab1d848fSNigel Hislop kfree(rssd_result); 2205ab1d848fSNigel Hislop kfree(psf_data); 2206ab1d848fSNigel Hislop out: 2207ab1d848fSNigel Hislop DBF_DEV_EVENT(DBF_WARNING, device, "Symmetrix ioctl: rc=%d", rc); 2208ab1d848fSNigel Hislop return rc; 2209ab1d848fSNigel Hislop } 2210ab1d848fSNigel Hislop 22111107ccfbSChristoph Hellwig static int 22128e09f215SStefan Weinhuber dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 22131107ccfbSChristoph Hellwig { 22148e09f215SStefan Weinhuber struct dasd_device *device = block->base; 22158e09f215SStefan Weinhuber 22161107ccfbSChristoph Hellwig switch (cmd) { 22171107ccfbSChristoph Hellwig case BIODASDGATTR: 22181107ccfbSChristoph Hellwig return dasd_eckd_get_attrib(device, argp); 22191107ccfbSChristoph Hellwig case BIODASDSATTR: 22201107ccfbSChristoph Hellwig return dasd_eckd_set_attrib(device, argp); 22211107ccfbSChristoph Hellwig case BIODASDPSRD: 22221107ccfbSChristoph Hellwig return dasd_eckd_performance(device, argp); 22231107ccfbSChristoph Hellwig case BIODASDRLSE: 22241107ccfbSChristoph Hellwig return dasd_eckd_release(device); 22251107ccfbSChristoph Hellwig case BIODASDRSRV: 22261107ccfbSChristoph Hellwig return dasd_eckd_reserve(device); 22271107ccfbSChristoph Hellwig case BIODASDSLCK: 22281107ccfbSChristoph Hellwig return dasd_eckd_steal_lock(device); 2229ab1d848fSNigel Hislop case BIODASDSYMMIO: 2230ab1d848fSNigel Hislop return dasd_symm_io(device, argp); 22311107ccfbSChristoph Hellwig default: 22321107ccfbSChristoph Hellwig return -ENOIOCTLCMD; 22331107ccfbSChristoph Hellwig } 22341107ccfbSChristoph Hellwig } 22351107ccfbSChristoph Hellwig 22361da177e4SLinus Torvalds /* 2237445b5b49SHorst Hummel * Dump the range of CCWs into 'page' buffer 2238445b5b49SHorst Hummel * and return number of printed chars. 2239445b5b49SHorst Hummel */ 22404d284cacSHeiko Carstens static int 2241445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 2242445b5b49SHorst Hummel { 2243445b5b49SHorst Hummel int len, count; 2244445b5b49SHorst Hummel char *datap; 2245445b5b49SHorst Hummel 2246445b5b49SHorst Hummel len = 0; 2247445b5b49SHorst Hummel while (from <= to) { 2248445b5b49SHorst Hummel len += sprintf(page + len, KERN_ERR PRINTK_HEADER 2249445b5b49SHorst Hummel " CCW %p: %08X %08X DAT:", 2250445b5b49SHorst Hummel from, ((int *) from)[0], ((int *) from)[1]); 2251445b5b49SHorst Hummel 2252445b5b49SHorst Hummel /* get pointer to data (consider IDALs) */ 2253445b5b49SHorst Hummel if (from->flags & CCW_FLAG_IDA) 2254445b5b49SHorst Hummel datap = (char *) *((addr_t *) (addr_t) from->cda); 2255445b5b49SHorst Hummel else 2256445b5b49SHorst Hummel datap = (char *) ((addr_t) from->cda); 2257445b5b49SHorst Hummel 2258445b5b49SHorst Hummel /* dump data (max 32 bytes) */ 2259445b5b49SHorst Hummel for (count = 0; count < from->count && count < 32; count++) { 2260445b5b49SHorst Hummel if (count % 8 == 0) len += sprintf(page + len, " "); 2261445b5b49SHorst Hummel if (count % 4 == 0) len += sprintf(page + len, " "); 2262445b5b49SHorst Hummel len += sprintf(page + len, "%02x", datap[count]); 2263445b5b49SHorst Hummel } 2264445b5b49SHorst Hummel len += sprintf(page + len, "\n"); 2265445b5b49SHorst Hummel from++; 2266445b5b49SHorst Hummel } 2267445b5b49SHorst Hummel return len; 2268445b5b49SHorst Hummel } 2269445b5b49SHorst Hummel 2270445b5b49SHorst Hummel /* 22711da177e4SLinus Torvalds * Print sense data and related channel program. 22721da177e4SLinus Torvalds * Parts are printed because printk buffer is only 1024 bytes. 22731da177e4SLinus Torvalds */ 22748e09f215SStefan Weinhuber static void dasd_eckd_dump_sense(struct dasd_device *device, 22758e09f215SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 22761da177e4SLinus Torvalds { 22771da177e4SLinus Torvalds char *page; 2278445b5b49SHorst Hummel struct ccw1 *first, *last, *fail, *from, *to; 2279445b5b49SHorst Hummel int len, sl, sct; 22801da177e4SLinus Torvalds 22811da177e4SLinus Torvalds page = (char *) get_zeroed_page(GFP_ATOMIC); 22821da177e4SLinus Torvalds if (page == NULL) { 22831da177e4SLinus Torvalds DEV_MESSAGE(KERN_ERR, device, " %s", 22841da177e4SLinus Torvalds "No memory to dump sense data"); 22851da177e4SLinus Torvalds return; 22861da177e4SLinus Torvalds } 2287445b5b49SHorst Hummel /* dump the sense data */ 22881da177e4SLinus Torvalds len = sprintf(page, KERN_ERR PRINTK_HEADER 22891da177e4SLinus Torvalds " I/O status report for device %s:\n", 22902a0217d5SKay Sievers dev_name(&device->cdev->dev)); 22911da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 22921da177e4SLinus Torvalds " in req: %p CS: 0x%02X DS: 0x%02X\n", req, 229323d805b6SPeter Oberparleiter irb->scsw.cmd.cstat, irb->scsw.cmd.dstat); 22941da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 22951da177e4SLinus Torvalds " device %s: Failing CCW: %p\n", 22962a0217d5SKay Sievers dev_name(&device->cdev->dev), 229723d805b6SPeter Oberparleiter (void *) (addr_t) irb->scsw.cmd.cpa); 22981da177e4SLinus Torvalds if (irb->esw.esw0.erw.cons) { 22991da177e4SLinus Torvalds for (sl = 0; sl < 4; sl++) { 23001da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 23011da177e4SLinus Torvalds " Sense(hex) %2d-%2d:", 23021da177e4SLinus Torvalds (8 * sl), ((8 * sl) + 7)); 23031da177e4SLinus Torvalds 23041da177e4SLinus Torvalds for (sct = 0; sct < 8; sct++) { 23051da177e4SLinus Torvalds len += sprintf(page + len, " %02x", 23061da177e4SLinus Torvalds irb->ecw[8 * sl + sct]); 23071da177e4SLinus Torvalds } 23081da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 23091da177e4SLinus Torvalds } 23101da177e4SLinus Torvalds 23111da177e4SLinus Torvalds if (irb->ecw[27] & DASD_SENSE_BIT_0) { 23121da177e4SLinus Torvalds /* 24 Byte Sense Data */ 2313445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 23141da177e4SLinus Torvalds " 24 Byte: %x MSG %x, " 23151da177e4SLinus Torvalds "%s MSGb to SYSOP\n", 23161da177e4SLinus Torvalds irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 23171da177e4SLinus Torvalds irb->ecw[1] & 0x10 ? "" : "no"); 23181da177e4SLinus Torvalds } else { 23191da177e4SLinus Torvalds /* 32 Byte Sense Data */ 2320445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 23211da177e4SLinus Torvalds " 32 Byte: Format: %x " 23221da177e4SLinus Torvalds "Exception class %x\n", 23231da177e4SLinus Torvalds irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 23241da177e4SLinus Torvalds } 23251da177e4SLinus Torvalds } else { 2326445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 23271da177e4SLinus Torvalds " SORRY - NO VALID SENSE AVAILABLE\n"); 23281da177e4SLinus Torvalds } 2329445b5b49SHorst Hummel printk("%s", page); 23301da177e4SLinus Torvalds 23318e09f215SStefan Weinhuber if (req) { 23328e09f215SStefan Weinhuber /* req == NULL for unsolicited interrupts */ 2333445b5b49SHorst Hummel /* dump the Channel Program (max 140 Bytes per line) */ 2334445b5b49SHorst Hummel /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 2335445b5b49SHorst Hummel first = req->cpaddr; 2336445b5b49SHorst Hummel for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 2337445b5b49SHorst Hummel to = min(first + 6, last); 23381da177e4SLinus Torvalds len = sprintf(page, KERN_ERR PRINTK_HEADER 23391da177e4SLinus Torvalds " Related CP in req: %p\n", req); 2340445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(first, to, page + len); 2341445b5b49SHorst Hummel printk("%s", page); 23421da177e4SLinus Torvalds 2343445b5b49SHorst Hummel /* print failing CCW area (maximum 4) */ 2344445b5b49SHorst Hummel /* scsw->cda is either valid or zero */ 23451da177e4SLinus Torvalds len = 0; 2346445b5b49SHorst Hummel from = ++to; 234723d805b6SPeter Oberparleiter fail = (struct ccw1 *)(addr_t) 234823d805b6SPeter Oberparleiter irb->scsw.cmd.cpa; /* failing CCW */ 2349445b5b49SHorst Hummel if (from < fail - 2) { 2350445b5b49SHorst Hummel from = fail - 2; /* there is a gap - print header */ 2351445b5b49SHorst Hummel len += sprintf(page, KERN_ERR PRINTK_HEADER "......\n"); 23521da177e4SLinus Torvalds } 2353445b5b49SHorst Hummel to = min(fail + 1, last); 2354445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, to, page + len); 23551da177e4SLinus Torvalds 2356445b5b49SHorst Hummel /* print last CCWs (maximum 2) */ 2357445b5b49SHorst Hummel from = max(from, ++to); 2358445b5b49SHorst Hummel if (from < last - 1) { 2359445b5b49SHorst Hummel from = last - 1; /* there is a gap - print header */ 23601da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n"); 23611da177e4SLinus Torvalds } 2362445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, last, page + len); 23631da177e4SLinus Torvalds if (len > 0) 2364445b5b49SHorst Hummel printk("%s", page); 23658e09f215SStefan Weinhuber } 23661da177e4SLinus Torvalds free_page((unsigned long) page); 23671da177e4SLinus Torvalds } 23681da177e4SLinus Torvalds 23691da177e4SLinus Torvalds /* 23701da177e4SLinus Torvalds * max_blocks is dependent on the amount of storage that is available 23711da177e4SLinus Torvalds * in the static io buffer for each device. Currently each device has 23721da177e4SLinus Torvalds * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has 23731da177e4SLinus Torvalds * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use 23741da177e4SLinus Torvalds * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In 23751da177e4SLinus Torvalds * addition we have one define extent ccw + 16 bytes of data and one 23761da177e4SLinus Torvalds * locate record ccw + 16 bytes of data. That makes: 23771da177e4SLinus Torvalds * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. 23781da177e4SLinus Torvalds * We want to fit two into the available memory so that we can immediately 23791da177e4SLinus Torvalds * start the next request if one finishes off. That makes 249.5 blocks 23801da177e4SLinus Torvalds * for one request. Give a little safety and the result is 240. 23811da177e4SLinus Torvalds */ 23821da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline = { 23831da177e4SLinus Torvalds .owner = THIS_MODULE, 23841da177e4SLinus Torvalds .name = "ECKD", 23851da177e4SLinus Torvalds .ebcname = "ECKD", 23861da177e4SLinus Torvalds .max_blocks = 240, 23871da177e4SLinus Torvalds .check_device = dasd_eckd_check_characteristics, 23888e09f215SStefan Weinhuber .uncheck_device = dasd_eckd_uncheck_device, 23891da177e4SLinus Torvalds .do_analysis = dasd_eckd_do_analysis, 23908e09f215SStefan Weinhuber .ready_to_online = dasd_eckd_ready_to_online, 23918e09f215SStefan Weinhuber .online_to_ready = dasd_eckd_online_to_ready, 23921da177e4SLinus Torvalds .fill_geometry = dasd_eckd_fill_geometry, 23931da177e4SLinus Torvalds .start_IO = dasd_start_IO, 23941da177e4SLinus Torvalds .term_IO = dasd_term_IO, 23958e09f215SStefan Weinhuber .handle_terminated_request = dasd_eckd_handle_terminated_request, 23961da177e4SLinus Torvalds .format_device = dasd_eckd_format_device, 23971da177e4SLinus Torvalds .erp_action = dasd_eckd_erp_action, 23981da177e4SLinus Torvalds .erp_postaction = dasd_eckd_erp_postaction, 23998e09f215SStefan Weinhuber .handle_unsolicited_interrupt = dasd_eckd_handle_unsolicited_interrupt, 24008e09f215SStefan Weinhuber .build_cp = dasd_eckd_build_alias_cp, 24018e09f215SStefan Weinhuber .free_cp = dasd_eckd_free_alias_cp, 24021da177e4SLinus Torvalds .dump_sense = dasd_eckd_dump_sense, 24031da177e4SLinus Torvalds .fill_info = dasd_eckd_fill_info, 24041107ccfbSChristoph Hellwig .ioctl = dasd_eckd_ioctl, 24051da177e4SLinus Torvalds }; 24061da177e4SLinus Torvalds 24071da177e4SLinus Torvalds static int __init 24081da177e4SLinus Torvalds dasd_eckd_init(void) 24091da177e4SLinus Torvalds { 24101da177e4SLinus Torvalds ASCEBC(dasd_eckd_discipline.ebcname, 4); 241140545573SHorst Hummel return ccw_driver_register(&dasd_eckd_driver); 24121da177e4SLinus Torvalds } 24131da177e4SLinus Torvalds 24141da177e4SLinus Torvalds static void __exit 24151da177e4SLinus Torvalds dasd_eckd_cleanup(void) 24161da177e4SLinus Torvalds { 24171da177e4SLinus Torvalds ccw_driver_unregister(&dasd_eckd_driver); 24181da177e4SLinus Torvalds } 24191da177e4SLinus Torvalds 24201da177e4SLinus Torvalds module_init(dasd_eckd_init); 24211da177e4SLinus Torvalds module_exit(dasd_eckd_cleanup); 2422