11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> 31da177e4SLinus Torvalds * Horst Hummel <Horst.Hummel@de.ibm.com> 41da177e4SLinus Torvalds * Carsten Otte <Cotte@de.ibm.com> 51da177e4SLinus Torvalds * Martin Schwidefsky <schwidefsky@de.ibm.com> 61da177e4SLinus Torvalds * Bugreports.to..: <Linux390@de.ibm.com> 7d41dd122SStefan Haberland * Copyright IBM Corp. 1999, 2009 8ab1d848fSNigel Hislop * EMC Symmetrix ioctl Copyright EMC Corporation, 2008 9ab1d848fSNigel Hislop * Author.........: Nigel Hislop <hislop_nigel@emc.com> 101da177e4SLinus Torvalds */ 111da177e4SLinus Torvalds 12ca99dab0SStefan Haberland #define KMSG_COMPONENT "dasd-eckd" 13fc19f381SStefan Haberland 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> 20048cd4e5SHeiko Carstens #include <linux/compat.h> 211da177e4SLinus Torvalds #include <linux/init.h> 221da177e4SLinus Torvalds 23382b7366SSebastian Ott #include <asm/css_chars.h> 241da177e4SLinus Torvalds #include <asm/debug.h> 251da177e4SLinus Torvalds #include <asm/idals.h> 261da177e4SLinus Torvalds #include <asm/ebcdic.h> 271da177e4SLinus Torvalds #include <asm/io.h> 281da177e4SLinus Torvalds #include <asm/uaccess.h> 2940545573SHorst Hummel #include <asm/cio.h> 301da177e4SLinus Torvalds #include <asm/ccwdev.h> 31f3eb5384SStefan Weinhuber #include <asm/itcw.h> 321da177e4SLinus Torvalds 331da177e4SLinus Torvalds #include "dasd_int.h" 341da177e4SLinus Torvalds #include "dasd_eckd.h" 351da177e4SLinus Torvalds 361da177e4SLinus Torvalds #ifdef PRINTK_HEADER 371da177e4SLinus Torvalds #undef PRINTK_HEADER 381da177e4SLinus Torvalds #endif /* PRINTK_HEADER */ 391da177e4SLinus Torvalds #define PRINTK_HEADER "dasd(eckd):" 401da177e4SLinus Torvalds 411da177e4SLinus Torvalds #define ECKD_C0(i) (i->home_bytes) 421da177e4SLinus Torvalds #define ECKD_F(i) (i->formula) 431da177e4SLinus Torvalds #define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\ 441da177e4SLinus Torvalds (i->factors.f_0x02.f1)) 451da177e4SLinus Torvalds #define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\ 461da177e4SLinus Torvalds (i->factors.f_0x02.f2)) 471da177e4SLinus Torvalds #define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\ 481da177e4SLinus Torvalds (i->factors.f_0x02.f3)) 491da177e4SLinus Torvalds #define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0) 501da177e4SLinus Torvalds #define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0) 511da177e4SLinus Torvalds #define ECKD_F6(i) (i->factor6) 521da177e4SLinus Torvalds #define ECKD_F7(i) (i->factor7) 531da177e4SLinus Torvalds #define ECKD_F8(i) (i->factor8) 541da177e4SLinus Torvalds 55e4dbb0f2SStefan Haberland /* 56e4dbb0f2SStefan Haberland * raw track access always map to 64k in memory 57e4dbb0f2SStefan Haberland * so it maps to 16 blocks of 4k per track 58e4dbb0f2SStefan Haberland */ 59e4dbb0f2SStefan Haberland #define DASD_RAW_BLOCK_PER_TRACK 16 60e4dbb0f2SStefan Haberland #define DASD_RAW_BLOCKSIZE 4096 61e4dbb0f2SStefan Haberland /* 64k are 128 x 512 byte sectors */ 62e4dbb0f2SStefan Haberland #define DASD_RAW_SECTORS_PER_TRACK 128 63e4dbb0f2SStefan Haberland 641da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 651da177e4SLinus Torvalds 661da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline; 671da177e4SLinus Torvalds 681da177e4SLinus Torvalds /* The ccw bus type uses this table to find devices that it sends to 691da177e4SLinus Torvalds * dasd_eckd_probe */ 701da177e4SLinus Torvalds static struct ccw_device_id dasd_eckd_ids[] = { 71d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1}, 72d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2}, 735da24b76SStefan Haberland { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3380, 0), .driver_info = 0x3}, 74d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4}, 75d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5}, 76d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6}, 77d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7}, 78d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8}, 79d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9}, 80d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa}, 811da177e4SLinus Torvalds { /* end of list */ }, 821da177e4SLinus Torvalds }; 831da177e4SLinus Torvalds 841da177e4SLinus Torvalds MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids); 851da177e4SLinus Torvalds 861da177e4SLinus Torvalds static struct ccw_driver dasd_eckd_driver; /* see below */ 871da177e4SLinus Torvalds 88eb6e199bSStefan Weinhuber #define INIT_CQR_OK 0 89eb6e199bSStefan Weinhuber #define INIT_CQR_UNFORMATTED 1 90eb6e199bSStefan Weinhuber #define INIT_CQR_ERROR 2 91eb6e199bSStefan Weinhuber 92f932bceaSStefan Weinhuber /* emergency request for reserve/release */ 93f932bceaSStefan Weinhuber static struct { 94f932bceaSStefan Weinhuber struct dasd_ccw_req cqr; 95f932bceaSStefan Weinhuber struct ccw1 ccw; 96f932bceaSStefan Weinhuber char data[32]; 97f932bceaSStefan Weinhuber } *dasd_reserve_req; 98f932bceaSStefan Weinhuber static DEFINE_MUTEX(dasd_reserve_mutex); 99f932bceaSStefan Weinhuber 100a4d26c6aSStefan Weinhuber /* definitions for the path verification worker */ 101a4d26c6aSStefan Weinhuber struct path_verification_work_data { 102a4d26c6aSStefan Weinhuber struct work_struct worker; 103a4d26c6aSStefan Weinhuber struct dasd_device *device; 104a4d26c6aSStefan Weinhuber struct dasd_ccw_req cqr; 105a4d26c6aSStefan Weinhuber struct ccw1 ccw; 106a4d26c6aSStefan Weinhuber __u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE]; 107a4d26c6aSStefan Weinhuber int isglobal; 108a4d26c6aSStefan Weinhuber __u8 tbvpm; 109a4d26c6aSStefan Weinhuber }; 110a4d26c6aSStefan Weinhuber static struct path_verification_work_data *path_verification_worker; 111a4d26c6aSStefan Weinhuber static DEFINE_MUTEX(dasd_path_verification_mutex); 112eb6e199bSStefan Weinhuber 1131da177e4SLinus Torvalds /* initial attempt at a probe function. this can be simplified once 1141da177e4SLinus Torvalds * the other detection code is gone */ 1151da177e4SLinus Torvalds static int 1161da177e4SLinus Torvalds dasd_eckd_probe (struct ccw_device *cdev) 1171da177e4SLinus Torvalds { 1181da177e4SLinus Torvalds int ret; 1191da177e4SLinus Torvalds 12040545573SHorst Hummel /* set ECKD specific ccw-device options */ 121454e1fa1SPeter Oberparleiter ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE | 122454e1fa1SPeter Oberparleiter CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH); 12340545573SHorst Hummel if (ret) { 124b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s", 125b8ed5dd5SStefan Haberland "dasd_eckd_probe: could not set " 126b8ed5dd5SStefan Haberland "ccw-device options"); 1271da177e4SLinus Torvalds return ret; 12840545573SHorst Hummel } 12940545573SHorst Hummel ret = dasd_generic_probe(cdev, &dasd_eckd_discipline); 13040545573SHorst Hummel return ret; 1311da177e4SLinus Torvalds } 1321da177e4SLinus Torvalds 1331da177e4SLinus Torvalds static int 1341da177e4SLinus Torvalds dasd_eckd_set_online(struct ccw_device *cdev) 1351da177e4SLinus Torvalds { 1361da177e4SLinus Torvalds return dasd_generic_set_online(cdev, &dasd_eckd_discipline); 1371da177e4SLinus Torvalds } 1381da177e4SLinus Torvalds 1391da177e4SLinus Torvalds static const int sizes_trk0[] = { 28, 148, 84 }; 1401da177e4SLinus Torvalds #define LABEL_SIZE 140 1411da177e4SLinus Torvalds 1421da177e4SLinus Torvalds static inline unsigned int 1431da177e4SLinus Torvalds round_up_multiple(unsigned int no, unsigned int mult) 1441da177e4SLinus Torvalds { 1451da177e4SLinus Torvalds int rem = no % mult; 1461da177e4SLinus Torvalds return (rem ? no - rem + mult : no); 1471da177e4SLinus Torvalds } 1481da177e4SLinus Torvalds 1491da177e4SLinus Torvalds static inline unsigned int 1501da177e4SLinus Torvalds ceil_quot(unsigned int d1, unsigned int d2) 1511da177e4SLinus Torvalds { 1521da177e4SLinus Torvalds return (d1 + (d2 - 1)) / d2; 1531da177e4SLinus Torvalds } 1541da177e4SLinus Torvalds 1554d284cacSHeiko Carstens static unsigned int 1561da177e4SLinus Torvalds recs_per_track(struct dasd_eckd_characteristics * rdc, 1571da177e4SLinus Torvalds unsigned int kl, unsigned int dl) 1581da177e4SLinus Torvalds { 1591da177e4SLinus Torvalds int dn, kn; 1601da177e4SLinus Torvalds 1611da177e4SLinus Torvalds switch (rdc->dev_type) { 1621da177e4SLinus Torvalds case 0x3380: 1631da177e4SLinus Torvalds if (kl) 1641da177e4SLinus Torvalds return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + 1651da177e4SLinus Torvalds ceil_quot(dl + 12, 32)); 1661da177e4SLinus Torvalds else 1671da177e4SLinus Torvalds return 1499 / (15 + ceil_quot(dl + 12, 32)); 1681da177e4SLinus Torvalds case 0x3390: 1691da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1701da177e4SLinus Torvalds if (kl) { 1711da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1721da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + 1731da177e4SLinus Torvalds 9 + ceil_quot(dl + 6 * dn, 34)); 1741da177e4SLinus Torvalds } else 1751da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); 1761da177e4SLinus Torvalds case 0x9345: 1771da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1781da177e4SLinus Torvalds if (kl) { 1791da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1801da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + 1811da177e4SLinus Torvalds ceil_quot(dl + 6 * dn, 34)); 1821da177e4SLinus Torvalds } else 1831da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); 1841da177e4SLinus Torvalds } 1851da177e4SLinus Torvalds return 0; 1861da177e4SLinus Torvalds } 1871da177e4SLinus Torvalds 188b44b0ab3SStefan Weinhuber static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head) 189b44b0ab3SStefan Weinhuber { 190b44b0ab3SStefan Weinhuber geo->cyl = (__u16) cyl; 191b44b0ab3SStefan Weinhuber geo->head = cyl >> 16; 192b44b0ab3SStefan Weinhuber geo->head <<= 4; 193b44b0ab3SStefan Weinhuber geo->head |= head; 194b44b0ab3SStefan Weinhuber } 195b44b0ab3SStefan Weinhuber 1964d284cacSHeiko Carstens static int 1971da177e4SLinus Torvalds check_XRC (struct ccw1 *de_ccw, 1981da177e4SLinus Torvalds struct DE_eckd_data *data, 1991da177e4SLinus Torvalds struct dasd_device *device) 2001da177e4SLinus Torvalds { 2011da177e4SLinus Torvalds struct dasd_eckd_private *private; 202d54853efSMartin Schwidefsky int rc; 2031da177e4SLinus Torvalds 2041da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 205d54853efSMartin Schwidefsky if (!private->rdc_data.facilities.XRC_supported) 206d54853efSMartin Schwidefsky return 0; 2071da177e4SLinus Torvalds 2081da177e4SLinus Torvalds /* switch on System Time Stamp - needed for XRC Support */ 2091da177e4SLinus Torvalds data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ 2101da177e4SLinus Torvalds data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ 2111da177e4SLinus Torvalds 212d54853efSMartin Schwidefsky rc = get_sync_clock(&data->ep_sys_time); 213d54853efSMartin Schwidefsky /* Ignore return code if sync clock is switched off. */ 214d54853efSMartin Schwidefsky if (rc == -ENOSYS || rc == -EACCES) 215d54853efSMartin Schwidefsky rc = 0; 2161da177e4SLinus Torvalds 2171da177e4SLinus Torvalds de_ccw->count = sizeof(struct DE_eckd_data); 2181da177e4SLinus Torvalds de_ccw->flags |= CCW_FLAG_SLI; 219d54853efSMartin Schwidefsky return rc; 2201da177e4SLinus Torvalds } 2211da177e4SLinus Torvalds 2224d284cacSHeiko Carstens static int 223b44b0ab3SStefan Weinhuber define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk, 224b44b0ab3SStefan Weinhuber unsigned int totrk, int cmd, struct dasd_device *device) 2251da177e4SLinus Torvalds { 2261da177e4SLinus Torvalds struct dasd_eckd_private *private; 227b44b0ab3SStefan Weinhuber u32 begcyl, endcyl; 228b44b0ab3SStefan Weinhuber u16 heads, beghead, endhead; 229d54853efSMartin Schwidefsky int rc = 0; 2301da177e4SLinus Torvalds 2311da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 2321da177e4SLinus Torvalds 2331da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; 2341da177e4SLinus Torvalds ccw->flags = 0; 2351da177e4SLinus Torvalds ccw->count = 16; 2361da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 2371da177e4SLinus Torvalds 2381da177e4SLinus Torvalds memset(data, 0, sizeof(struct DE_eckd_data)); 2391da177e4SLinus Torvalds switch (cmd) { 2401da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 2411da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 2421da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 2431da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 2441da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 2451da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 2461da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 2471da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 2481da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_COUNT: 2491da177e4SLinus Torvalds data->mask.perm = 0x1; 2501da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 2511da177e4SLinus Torvalds break; 2521da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 2531da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 2541da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 2551da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 2561da177e4SLinus Torvalds data->mask.perm = 0x02; 2571da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 258d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2591da177e4SLinus Torvalds break; 2601da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 2611da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 2621da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 263d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2641da177e4SLinus Torvalds break; 2651da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 2661da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 2671da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 2681da177e4SLinus Torvalds data->mask.perm = 0x3; 2691da177e4SLinus Torvalds data->mask.auth = 0x1; 2701da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 271d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2721da177e4SLinus Torvalds break; 2731da177e4SLinus Torvalds default: 274fc19f381SStefan Haberland dev_err(&device->cdev->dev, 275fc19f381SStefan Haberland "0x%x is not a known command\n", cmd); 2761da177e4SLinus Torvalds break; 2771da177e4SLinus Torvalds } 2781da177e4SLinus Torvalds 2791da177e4SLinus Torvalds data->attributes.mode = 0x3; /* ECKD */ 2801da177e4SLinus Torvalds 2811da177e4SLinus Torvalds if ((private->rdc_data.cu_type == 0x2105 || 2821da177e4SLinus Torvalds private->rdc_data.cu_type == 0x2107 || 2831da177e4SLinus Torvalds private->rdc_data.cu_type == 0x1750) 2841da177e4SLinus Torvalds && !(private->uses_cdl && trk < 2)) 2851da177e4SLinus Torvalds data->ga_extended |= 0x40; /* Regular Data Format Mode */ 2861da177e4SLinus Torvalds 287b44b0ab3SStefan Weinhuber heads = private->rdc_data.trk_per_cyl; 288b44b0ab3SStefan Weinhuber begcyl = trk / heads; 289b44b0ab3SStefan Weinhuber beghead = trk % heads; 290b44b0ab3SStefan Weinhuber endcyl = totrk / heads; 291b44b0ab3SStefan Weinhuber endhead = totrk % heads; 2921da177e4SLinus Torvalds 2931da177e4SLinus Torvalds /* check for sequential prestage - enhance cylinder range */ 2941da177e4SLinus Torvalds if (data->attributes.operation == DASD_SEQ_PRESTAGE || 2951da177e4SLinus Torvalds data->attributes.operation == DASD_SEQ_ACCESS) { 2961da177e4SLinus Torvalds 297b44b0ab3SStefan Weinhuber if (endcyl + private->attrib.nr_cyl < private->real_cyl) 298b44b0ab3SStefan Weinhuber endcyl += private->attrib.nr_cyl; 2991da177e4SLinus Torvalds else 300b44b0ab3SStefan Weinhuber endcyl = (private->real_cyl - 1); 3011da177e4SLinus Torvalds } 3021da177e4SLinus Torvalds 303b44b0ab3SStefan Weinhuber set_ch_t(&data->beg_ext, begcyl, beghead); 304b44b0ab3SStefan Weinhuber set_ch_t(&data->end_ext, endcyl, endhead); 305d54853efSMartin Schwidefsky return rc; 3061da177e4SLinus Torvalds } 3071da177e4SLinus Torvalds 3088e09f215SStefan Weinhuber static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata, 3098e09f215SStefan Weinhuber struct dasd_device *device) 3108e09f215SStefan Weinhuber { 3118e09f215SStefan Weinhuber struct dasd_eckd_private *private; 3128e09f215SStefan Weinhuber int rc; 3138e09f215SStefan Weinhuber 3148e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 3158e09f215SStefan Weinhuber if (!private->rdc_data.facilities.XRC_supported) 3168e09f215SStefan Weinhuber return 0; 3178e09f215SStefan Weinhuber 3188e09f215SStefan Weinhuber /* switch on System Time Stamp - needed for XRC Support */ 319f3eb5384SStefan Weinhuber pfxdata->define_extent.ga_extended |= 0x08; /* 'Time Stamp Valid' */ 320f3eb5384SStefan Weinhuber pfxdata->define_extent.ga_extended |= 0x02; /* 'Extended Parameter' */ 3218e09f215SStefan Weinhuber pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */ 3228e09f215SStefan Weinhuber 323f3eb5384SStefan Weinhuber rc = get_sync_clock(&pfxdata->define_extent.ep_sys_time); 3248e09f215SStefan Weinhuber /* Ignore return code if sync clock is switched off. */ 3258e09f215SStefan Weinhuber if (rc == -ENOSYS || rc == -EACCES) 3268e09f215SStefan Weinhuber rc = 0; 3278e09f215SStefan Weinhuber return rc; 3288e09f215SStefan Weinhuber } 3298e09f215SStefan Weinhuber 330f3eb5384SStefan Weinhuber static void fill_LRE_data(struct LRE_eckd_data *data, unsigned int trk, 331f3eb5384SStefan Weinhuber unsigned int rec_on_trk, int count, int cmd, 332f3eb5384SStefan Weinhuber struct dasd_device *device, unsigned int reclen, 333f3eb5384SStefan Weinhuber unsigned int tlf) 334f3eb5384SStefan Weinhuber { 335f3eb5384SStefan Weinhuber struct dasd_eckd_private *private; 336f3eb5384SStefan Weinhuber int sector; 337f3eb5384SStefan Weinhuber int dn, d; 338f3eb5384SStefan Weinhuber 339f3eb5384SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 340f3eb5384SStefan Weinhuber 341f3eb5384SStefan Weinhuber memset(data, 0, sizeof(*data)); 342f3eb5384SStefan Weinhuber sector = 0; 343f3eb5384SStefan Weinhuber if (rec_on_trk) { 344f3eb5384SStefan Weinhuber switch (private->rdc_data.dev_type) { 345f3eb5384SStefan Weinhuber case 0x3390: 346f3eb5384SStefan Weinhuber dn = ceil_quot(reclen + 6, 232); 347f3eb5384SStefan Weinhuber d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 348f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 349f3eb5384SStefan Weinhuber break; 350f3eb5384SStefan Weinhuber case 0x3380: 351f3eb5384SStefan Weinhuber d = 7 + ceil_quot(reclen + 12, 32); 352f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 353f3eb5384SStefan Weinhuber break; 354f3eb5384SStefan Weinhuber } 355f3eb5384SStefan Weinhuber } 356f3eb5384SStefan Weinhuber data->sector = sector; 357f3eb5384SStefan Weinhuber /* note: meaning of count depends on the operation 358f3eb5384SStefan Weinhuber * for record based I/O it's the number of records, but for 359f3eb5384SStefan Weinhuber * track based I/O it's the number of tracks 360f3eb5384SStefan Weinhuber */ 361f3eb5384SStefan Weinhuber data->count = count; 362f3eb5384SStefan Weinhuber switch (cmd) { 363f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 364f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 365f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 366f3eb5384SStefan Weinhuber break; 367f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_HOME_ADDRESS: 368f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 369f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 370f3eb5384SStefan Weinhuber break; 371f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 372f3eb5384SStefan Weinhuber data->operation.orientation = 0x1; 373f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 374f3eb5384SStefan Weinhuber data->count++; 375f3eb5384SStefan Weinhuber break; 376f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_RECORD_ZERO: 377f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 378f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 379f3eb5384SStefan Weinhuber data->count++; 380f3eb5384SStefan Weinhuber break; 381f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE: 382f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_MT: 383f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD: 384f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD_MT: 385f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 386f3eb5384SStefan Weinhuber data->length = reclen; 387f3eb5384SStefan Weinhuber data->operation.operation = 0x01; 388f3eb5384SStefan Weinhuber break; 389f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD: 390f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD_MT: 391f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 392f3eb5384SStefan Weinhuber data->length = reclen; 393f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 394f3eb5384SStefan Weinhuber break; 395e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_WRITE_FULL_TRACK: 396e4dbb0f2SStefan Haberland data->operation.orientation = 0x0; 397e4dbb0f2SStefan Haberland data->operation.operation = 0x3F; 398e4dbb0f2SStefan Haberland data->extended_operation = 0x11; 399e4dbb0f2SStefan Haberland data->length = 0; 400e4dbb0f2SStefan Haberland data->extended_parameter_length = 0x02; 401e4dbb0f2SStefan Haberland if (data->count > 8) { 402e4dbb0f2SStefan Haberland data->extended_parameter[0] = 0xFF; 403e4dbb0f2SStefan Haberland data->extended_parameter[1] = 0xFF; 404e4dbb0f2SStefan Haberland data->extended_parameter[1] <<= (16 - count); 405e4dbb0f2SStefan Haberland } else { 406e4dbb0f2SStefan Haberland data->extended_parameter[0] = 0xFF; 407e4dbb0f2SStefan Haberland data->extended_parameter[0] <<= (8 - count); 408e4dbb0f2SStefan Haberland data->extended_parameter[1] = 0x00; 409e4dbb0f2SStefan Haberland } 410e4dbb0f2SStefan Haberland data->sector = 0xFF; 411e4dbb0f2SStefan Haberland break; 412f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 413f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 414f3eb5384SStefan Weinhuber data->length = reclen; /* not tlf, as one might think */ 415f3eb5384SStefan Weinhuber data->operation.operation = 0x3F; 416f3eb5384SStefan Weinhuber data->extended_operation = 0x23; 417f3eb5384SStefan Weinhuber break; 418f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ: 419f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_MT: 420f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_KD: 421f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_KD_MT: 422f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 423f3eb5384SStefan Weinhuber data->length = reclen; 424f3eb5384SStefan Weinhuber data->operation.operation = 0x06; 425f3eb5384SStefan Weinhuber break; 426f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD: 427f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD_MT: 428f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 429f3eb5384SStefan Weinhuber data->length = reclen; 430f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 431f3eb5384SStefan Weinhuber break; 432f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_COUNT: 433f3eb5384SStefan Weinhuber data->operation.operation = 0x06; 434f3eb5384SStefan Weinhuber break; 435e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_READ_TRACK: 436e4dbb0f2SStefan Haberland data->operation.orientation = 0x1; 437e4dbb0f2SStefan Haberland data->operation.operation = 0x0C; 438e4dbb0f2SStefan Haberland data->extended_parameter_length = 0; 439e4dbb0f2SStefan Haberland data->sector = 0xFF; 440e4dbb0f2SStefan Haberland break; 441f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 442f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 443f3eb5384SStefan Weinhuber data->length = tlf; 444f3eb5384SStefan Weinhuber data->operation.operation = 0x0C; 445f3eb5384SStefan Weinhuber break; 446f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_ERASE: 447f3eb5384SStefan Weinhuber data->length = reclen; 448f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 449f3eb5384SStefan Weinhuber data->operation.operation = 0x0b; 450f3eb5384SStefan Weinhuber break; 451f3eb5384SStefan Weinhuber default: 452f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, device, 453f3eb5384SStefan Weinhuber "fill LRE unknown opcode 0x%x", cmd); 454f3eb5384SStefan Weinhuber BUG(); 455f3eb5384SStefan Weinhuber } 456f3eb5384SStefan Weinhuber set_ch_t(&data->seek_addr, 457f3eb5384SStefan Weinhuber trk / private->rdc_data.trk_per_cyl, 458f3eb5384SStefan Weinhuber trk % private->rdc_data.trk_per_cyl); 459f3eb5384SStefan Weinhuber data->search_arg.cyl = data->seek_addr.cyl; 460f3eb5384SStefan Weinhuber data->search_arg.head = data->seek_addr.head; 461f3eb5384SStefan Weinhuber data->search_arg.record = rec_on_trk; 462f3eb5384SStefan Weinhuber } 463f3eb5384SStefan Weinhuber 464f3eb5384SStefan Weinhuber static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 465b44b0ab3SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 466f3eb5384SStefan Weinhuber struct dasd_device *basedev, struct dasd_device *startdev, 467f3eb5384SStefan Weinhuber unsigned char format, unsigned int rec_on_trk, int count, 468f3eb5384SStefan Weinhuber unsigned int blksize, unsigned int tlf) 4698e09f215SStefan Weinhuber { 4708e09f215SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 471f3eb5384SStefan Weinhuber struct DE_eckd_data *dedata; 472f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 473b44b0ab3SStefan Weinhuber u32 begcyl, endcyl; 474b44b0ab3SStefan Weinhuber u16 heads, beghead, endhead; 4758e09f215SStefan Weinhuber int rc = 0; 4768e09f215SStefan Weinhuber 4778e09f215SStefan Weinhuber basepriv = (struct dasd_eckd_private *) basedev->private; 4788e09f215SStefan Weinhuber startpriv = (struct dasd_eckd_private *) startdev->private; 479f3eb5384SStefan Weinhuber dedata = &pfxdata->define_extent; 480f3eb5384SStefan Weinhuber lredata = &pfxdata->locate_record; 4818e09f215SStefan Weinhuber 4828e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PFX; 4838e09f215SStefan Weinhuber ccw->flags = 0; 484e4dbb0f2SStefan Haberland if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) { 485e4dbb0f2SStefan Haberland ccw->count = sizeof(*pfxdata) + 2; 486e4dbb0f2SStefan Haberland ccw->cda = (__u32) __pa(pfxdata); 487e4dbb0f2SStefan Haberland memset(pfxdata, 0, sizeof(*pfxdata) + 2); 488e4dbb0f2SStefan Haberland } else { 4898e09f215SStefan Weinhuber ccw->count = sizeof(*pfxdata); 4908e09f215SStefan Weinhuber ccw->cda = (__u32) __pa(pfxdata); 4918e09f215SStefan Weinhuber memset(pfxdata, 0, sizeof(*pfxdata)); 492e4dbb0f2SStefan Haberland } 493e4dbb0f2SStefan Haberland 4948e09f215SStefan Weinhuber /* prefix data */ 495f3eb5384SStefan Weinhuber if (format > 1) { 496f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 497f3eb5384SStefan Weinhuber "PFX LRE unknown format 0x%x", format); 498f3eb5384SStefan Weinhuber BUG(); 499f3eb5384SStefan Weinhuber return -EINVAL; 500f3eb5384SStefan Weinhuber } 501f3eb5384SStefan Weinhuber pfxdata->format = format; 5024abb08c2SStefan Weinhuber pfxdata->base_address = basepriv->ned->unit_addr; 5034abb08c2SStefan Weinhuber pfxdata->base_lss = basepriv->ned->ID; 504f3eb5384SStefan Weinhuber pfxdata->validity.define_extent = 1; 5058e09f215SStefan Weinhuber 5068e09f215SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 5078e09f215SStefan Weinhuber if (startpriv->uid.type != UA_BASE_DEVICE) { 5088e09f215SStefan Weinhuber pfxdata->validity.verify_base = 1; 5098e09f215SStefan Weinhuber if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 5108e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 1; 5118e09f215SStefan Weinhuber } 5128e09f215SStefan Weinhuber 5138e09f215SStefan Weinhuber /* define extend data (mostly)*/ 5148e09f215SStefan Weinhuber switch (cmd) { 5158e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_HOME_ADDRESS: 5168e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_RECORD_ZERO: 5178e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ: 5188e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_MT: 5198e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD: 5208e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD_MT: 5218e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_KD: 5228e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_KD_MT: 5238e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_COUNT: 524f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 525f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 526f3eb5384SStefan Weinhuber break; 527e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_READ_TRACK: 528f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 529f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 530f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 531f3eb5384SStefan Weinhuber dedata->blk_size = 0; 5328e09f215SStefan Weinhuber break; 5338e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE: 5348e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_MT: 5358e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD: 5368e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD_MT: 537f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 538f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 5398e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 5408e09f215SStefan Weinhuber break; 5418e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD: 5428e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD_MT: 543f3eb5384SStefan Weinhuber dedata->attributes.operation = DASD_BYPASS_CACHE; 5448e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 5458e09f215SStefan Weinhuber break; 5468e09f215SStefan Weinhuber case DASD_ECKD_CCW_ERASE: 5478e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 5488e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 549f3eb5384SStefan Weinhuber dedata->mask.perm = 0x3; 550f3eb5384SStefan Weinhuber dedata->mask.auth = 0x1; 551f3eb5384SStefan Weinhuber dedata->attributes.operation = DASD_BYPASS_CACHE; 552f3eb5384SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 553f3eb5384SStefan Weinhuber break; 554e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_WRITE_FULL_TRACK: 555e4dbb0f2SStefan Haberland dedata->mask.perm = 0x03; 556e4dbb0f2SStefan Haberland dedata->attributes.operation = basepriv->attrib.operation; 557e4dbb0f2SStefan Haberland dedata->blk_size = 0; 558e4dbb0f2SStefan Haberland break; 559f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 560f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 561f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 562f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 5638e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 5648e09f215SStefan Weinhuber break; 5658e09f215SStefan Weinhuber default: 566f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 567f3eb5384SStefan Weinhuber "PFX LRE unknown opcode 0x%x", cmd); 568f3eb5384SStefan Weinhuber BUG(); 569f3eb5384SStefan Weinhuber return -EINVAL; 5708e09f215SStefan Weinhuber } 5718e09f215SStefan Weinhuber 572f3eb5384SStefan Weinhuber dedata->attributes.mode = 0x3; /* ECKD */ 5738e09f215SStefan Weinhuber 5748e09f215SStefan Weinhuber if ((basepriv->rdc_data.cu_type == 0x2105 || 5758e09f215SStefan Weinhuber basepriv->rdc_data.cu_type == 0x2107 || 5768e09f215SStefan Weinhuber basepriv->rdc_data.cu_type == 0x1750) 5778e09f215SStefan Weinhuber && !(basepriv->uses_cdl && trk < 2)) 578f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x40; /* Regular Data Format Mode */ 5798e09f215SStefan Weinhuber 580b44b0ab3SStefan Weinhuber heads = basepriv->rdc_data.trk_per_cyl; 581b44b0ab3SStefan Weinhuber begcyl = trk / heads; 582b44b0ab3SStefan Weinhuber beghead = trk % heads; 583b44b0ab3SStefan Weinhuber endcyl = totrk / heads; 584b44b0ab3SStefan Weinhuber endhead = totrk % heads; 5858e09f215SStefan Weinhuber 5868e09f215SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 587f3eb5384SStefan Weinhuber if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 588f3eb5384SStefan Weinhuber dedata->attributes.operation == DASD_SEQ_ACCESS) { 5898e09f215SStefan Weinhuber 590b44b0ab3SStefan Weinhuber if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 591b44b0ab3SStefan Weinhuber endcyl += basepriv->attrib.nr_cyl; 5928e09f215SStefan Weinhuber else 593b44b0ab3SStefan Weinhuber endcyl = (basepriv->real_cyl - 1); 5948e09f215SStefan Weinhuber } 5958e09f215SStefan Weinhuber 596f3eb5384SStefan Weinhuber set_ch_t(&dedata->beg_ext, begcyl, beghead); 597f3eb5384SStefan Weinhuber set_ch_t(&dedata->end_ext, endcyl, endhead); 598f3eb5384SStefan Weinhuber 599f3eb5384SStefan Weinhuber if (format == 1) { 600f3eb5384SStefan Weinhuber fill_LRE_data(lredata, trk, rec_on_trk, count, cmd, 601f3eb5384SStefan Weinhuber basedev, blksize, tlf); 602f3eb5384SStefan Weinhuber } 603f3eb5384SStefan Weinhuber 6048e09f215SStefan Weinhuber return rc; 6058e09f215SStefan Weinhuber } 6068e09f215SStefan Weinhuber 607f3eb5384SStefan Weinhuber static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 608f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 609f3eb5384SStefan Weinhuber struct dasd_device *basedev, struct dasd_device *startdev) 610f3eb5384SStefan Weinhuber { 611f3eb5384SStefan Weinhuber return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev, 612f3eb5384SStefan Weinhuber 0, 0, 0, 0, 0); 613f3eb5384SStefan Weinhuber } 614f3eb5384SStefan Weinhuber 6154d284cacSHeiko Carstens static void 616b44b0ab3SStefan Weinhuber locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk, 617b44b0ab3SStefan Weinhuber unsigned int rec_on_trk, int no_rec, int cmd, 6181da177e4SLinus Torvalds struct dasd_device * device, int reclen) 6191da177e4SLinus Torvalds { 6201da177e4SLinus Torvalds struct dasd_eckd_private *private; 6211da177e4SLinus Torvalds int sector; 6221da177e4SLinus Torvalds int dn, d; 6231da177e4SLinus Torvalds 6241da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 6251da177e4SLinus Torvalds 6261da177e4SLinus Torvalds DBF_DEV_EVENT(DBF_INFO, device, 6271da177e4SLinus Torvalds "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", 6281da177e4SLinus Torvalds trk, rec_on_trk, no_rec, cmd, reclen); 6291da177e4SLinus Torvalds 6301da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; 6311da177e4SLinus Torvalds ccw->flags = 0; 6321da177e4SLinus Torvalds ccw->count = 16; 6331da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 6341da177e4SLinus Torvalds 6351da177e4SLinus Torvalds memset(data, 0, sizeof(struct LO_eckd_data)); 6361da177e4SLinus Torvalds sector = 0; 6371da177e4SLinus Torvalds if (rec_on_trk) { 6381da177e4SLinus Torvalds switch (private->rdc_data.dev_type) { 6391da177e4SLinus Torvalds case 0x3390: 6401da177e4SLinus Torvalds dn = ceil_quot(reclen + 6, 232); 6411da177e4SLinus Torvalds d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 6421da177e4SLinus Torvalds sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 6431da177e4SLinus Torvalds break; 6441da177e4SLinus Torvalds case 0x3380: 6451da177e4SLinus Torvalds d = 7 + ceil_quot(reclen + 12, 32); 6461da177e4SLinus Torvalds sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 6471da177e4SLinus Torvalds break; 6481da177e4SLinus Torvalds } 6491da177e4SLinus Torvalds } 6501da177e4SLinus Torvalds data->sector = sector; 6511da177e4SLinus Torvalds data->count = no_rec; 6521da177e4SLinus Torvalds switch (cmd) { 6531da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 6541da177e4SLinus Torvalds data->operation.orientation = 0x3; 6551da177e4SLinus Torvalds data->operation.operation = 0x03; 6561da177e4SLinus Torvalds break; 6571da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 6581da177e4SLinus Torvalds data->operation.orientation = 0x3; 6591da177e4SLinus Torvalds data->operation.operation = 0x16; 6601da177e4SLinus Torvalds break; 6611da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 6621da177e4SLinus Torvalds data->operation.orientation = 0x1; 6631da177e4SLinus Torvalds data->operation.operation = 0x03; 6641da177e4SLinus Torvalds data->count++; 6651da177e4SLinus Torvalds break; 6661da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 6671da177e4SLinus Torvalds data->operation.orientation = 0x3; 6681da177e4SLinus Torvalds data->operation.operation = 0x16; 6691da177e4SLinus Torvalds data->count++; 6701da177e4SLinus Torvalds break; 6711da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 6721da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 6731da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 6741da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 6751da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6761da177e4SLinus Torvalds data->length = reclen; 6771da177e4SLinus Torvalds data->operation.operation = 0x01; 6781da177e4SLinus Torvalds break; 6791da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 6801da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 6811da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6821da177e4SLinus Torvalds data->length = reclen; 6831da177e4SLinus Torvalds data->operation.operation = 0x03; 6841da177e4SLinus Torvalds break; 6851da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 6861da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 6871da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 6881da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 6891da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6901da177e4SLinus Torvalds data->length = reclen; 6911da177e4SLinus Torvalds data->operation.operation = 0x06; 6921da177e4SLinus Torvalds break; 6931da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 6941da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 6951da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6961da177e4SLinus Torvalds data->length = reclen; 6971da177e4SLinus Torvalds data->operation.operation = 0x16; 6981da177e4SLinus Torvalds break; 6991da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_COUNT: 7001da177e4SLinus Torvalds data->operation.operation = 0x06; 7011da177e4SLinus Torvalds break; 7021da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 7031da177e4SLinus Torvalds data->length = reclen; 7041da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 7051da177e4SLinus Torvalds data->operation.operation = 0x0b; 7061da177e4SLinus Torvalds break; 7071da177e4SLinus Torvalds default: 708fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record " 709fc19f381SStefan Haberland "opcode 0x%x", cmd); 7101da177e4SLinus Torvalds } 711b44b0ab3SStefan Weinhuber set_ch_t(&data->seek_addr, 712b44b0ab3SStefan Weinhuber trk / private->rdc_data.trk_per_cyl, 713b44b0ab3SStefan Weinhuber trk % private->rdc_data.trk_per_cyl); 714b44b0ab3SStefan Weinhuber data->search_arg.cyl = data->seek_addr.cyl; 715b44b0ab3SStefan Weinhuber data->search_arg.head = data->seek_addr.head; 7161da177e4SLinus Torvalds data->search_arg.record = rec_on_trk; 7171da177e4SLinus Torvalds } 7181da177e4SLinus Torvalds 7191da177e4SLinus Torvalds /* 7201da177e4SLinus Torvalds * Returns 1 if the block is one of the special blocks that needs 7211da177e4SLinus Torvalds * to get read/written with the KD variant of the command. 7221da177e4SLinus Torvalds * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and 7231da177e4SLinus Torvalds * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. 7241da177e4SLinus Torvalds * Luckily the KD variants differ only by one bit (0x08) from the 7251da177e4SLinus Torvalds * normal variant. So don't wonder about code like: 7261da177e4SLinus Torvalds * if (dasd_eckd_cdl_special(blk_per_trk, recid)) 7271da177e4SLinus Torvalds * ccw->cmd_code |= 0x8; 7281da177e4SLinus Torvalds */ 7291da177e4SLinus Torvalds static inline int 7301da177e4SLinus Torvalds dasd_eckd_cdl_special(int blk_per_trk, int recid) 7311da177e4SLinus Torvalds { 7321da177e4SLinus Torvalds if (recid < 3) 7331da177e4SLinus Torvalds return 1; 7341da177e4SLinus Torvalds if (recid < blk_per_trk) 7351da177e4SLinus Torvalds return 0; 7361da177e4SLinus Torvalds if (recid < 2 * blk_per_trk) 7371da177e4SLinus Torvalds return 1; 7381da177e4SLinus Torvalds return 0; 7391da177e4SLinus Torvalds } 7401da177e4SLinus Torvalds 7411da177e4SLinus Torvalds /* 7421da177e4SLinus Torvalds * Returns the record size for the special blocks of the cdl format. 7431da177e4SLinus Torvalds * Only returns something useful if dasd_eckd_cdl_special is true 7441da177e4SLinus Torvalds * for the recid. 7451da177e4SLinus Torvalds */ 7461da177e4SLinus Torvalds static inline int 7471da177e4SLinus Torvalds dasd_eckd_cdl_reclen(int recid) 7481da177e4SLinus Torvalds { 7491da177e4SLinus Torvalds if (recid < 3) 7501da177e4SLinus Torvalds return sizes_trk0[recid]; 7511da177e4SLinus Torvalds return LABEL_SIZE; 7521da177e4SLinus Torvalds } 753b206181dSStefan Haberland /* create unique id from private structure. */ 754b206181dSStefan Haberland static void create_uid(struct dasd_eckd_private *private) 7553d052595SHorst Hummel { 7564abb08c2SStefan Weinhuber int count; 757b206181dSStefan Haberland struct dasd_uid *uid; 7583d052595SHorst Hummel 7592dedf0d9SStefan Haberland uid = &private->uid; 7603d052595SHorst Hummel memset(uid, 0, sizeof(struct dasd_uid)); 7614abb08c2SStefan Weinhuber memcpy(uid->vendor, private->ned->HDA_manufacturer, 7623d052595SHorst Hummel sizeof(uid->vendor) - 1); 7633d052595SHorst Hummel EBCASC(uid->vendor, sizeof(uid->vendor) - 1); 7644abb08c2SStefan Weinhuber memcpy(uid->serial, private->ned->HDA_location, 7653d052595SHorst Hummel sizeof(uid->serial) - 1); 7663d052595SHorst Hummel EBCASC(uid->serial, sizeof(uid->serial) - 1); 7674abb08c2SStefan Weinhuber uid->ssid = private->gneq->subsystemID; 768a419aef8SJoe Perches uid->real_unit_addr = private->ned->unit_addr; 7694abb08c2SStefan Weinhuber if (private->sneq) { 7704abb08c2SStefan Weinhuber uid->type = private->sneq->sua_flags; 7718e09f215SStefan Weinhuber if (uid->type == UA_BASE_PAV_ALIAS) 7724abb08c2SStefan Weinhuber uid->base_unit_addr = private->sneq->base_unit_addr; 7738e09f215SStefan Weinhuber } else { 7748e09f215SStefan Weinhuber uid->type = UA_BASE_DEVICE; 7758e09f215SStefan Weinhuber } 7764abb08c2SStefan Weinhuber if (private->vdsneq) { 7774abb08c2SStefan Weinhuber for (count = 0; count < 16; count++) { 7784abb08c2SStefan Weinhuber sprintf(uid->vduit+2*count, "%02x", 7794abb08c2SStefan Weinhuber private->vdsneq->uit[count]); 7804abb08c2SStefan Weinhuber } 7814abb08c2SStefan Weinhuber } 782b206181dSStefan Haberland } 783b206181dSStefan Haberland 784b206181dSStefan Haberland /* 785b206181dSStefan Haberland * Generate device unique id that specifies the physical device. 786b206181dSStefan Haberland */ 787b206181dSStefan Haberland static int dasd_eckd_generate_uid(struct dasd_device *device) 788b206181dSStefan Haberland { 789b206181dSStefan Haberland struct dasd_eckd_private *private; 790b206181dSStefan Haberland unsigned long flags; 791b206181dSStefan Haberland 792b206181dSStefan Haberland private = (struct dasd_eckd_private *) device->private; 793b206181dSStefan Haberland if (!private) 794b206181dSStefan Haberland return -ENODEV; 795b206181dSStefan Haberland if (!private->ned || !private->gneq) 796b206181dSStefan Haberland return -ENODEV; 797b206181dSStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 798b206181dSStefan Haberland create_uid(private); 7992dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 8003d052595SHorst Hummel return 0; 8013d052595SHorst Hummel } 8023d052595SHorst Hummel 8032dedf0d9SStefan Haberland static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid) 8042dedf0d9SStefan Haberland { 8052dedf0d9SStefan Haberland struct dasd_eckd_private *private; 8062dedf0d9SStefan Haberland unsigned long flags; 8072dedf0d9SStefan Haberland 8082dedf0d9SStefan Haberland if (device->private) { 8092dedf0d9SStefan Haberland private = (struct dasd_eckd_private *)device->private; 8102dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 8112dedf0d9SStefan Haberland *uid = private->uid; 8122dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 8132dedf0d9SStefan Haberland return 0; 8142dedf0d9SStefan Haberland } 8152dedf0d9SStefan Haberland return -EINVAL; 8162dedf0d9SStefan Haberland } 8172dedf0d9SStefan Haberland 818b206181dSStefan Haberland /* 819b206181dSStefan Haberland * compare device UID with data of a given dasd_eckd_private structure 820b206181dSStefan Haberland * return 0 for match 821b206181dSStefan Haberland */ 822b206181dSStefan Haberland static int dasd_eckd_compare_path_uid(struct dasd_device *device, 823b206181dSStefan Haberland struct dasd_eckd_private *private) 824b206181dSStefan Haberland { 825b206181dSStefan Haberland struct dasd_uid device_uid; 826b206181dSStefan Haberland 827b206181dSStefan Haberland create_uid(private); 828b206181dSStefan Haberland dasd_eckd_get_uid(device, &device_uid); 829b206181dSStefan Haberland 830b206181dSStefan Haberland return memcmp(&device_uid, &private->uid, sizeof(struct dasd_uid)); 831b206181dSStefan Haberland } 832b206181dSStefan Haberland 833a4d26c6aSStefan Weinhuber static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device, 834a4d26c6aSStefan Weinhuber struct dasd_ccw_req *cqr, 835a4d26c6aSStefan Weinhuber __u8 *rcd_buffer, 836a4d26c6aSStefan Weinhuber __u8 lpm) 83717283b56SCornelia Huck { 83817283b56SCornelia Huck struct ccw1 *ccw; 839a4d26c6aSStefan Weinhuber /* 840a4d26c6aSStefan Weinhuber * buffer has to start with EBCDIC "V1.0" to show 841a4d26c6aSStefan Weinhuber * support for virtual device SNEQ 842a4d26c6aSStefan Weinhuber */ 843a4d26c6aSStefan Weinhuber rcd_buffer[0] = 0xE5; 844a4d26c6aSStefan Weinhuber rcd_buffer[1] = 0xF1; 845a4d26c6aSStefan Weinhuber rcd_buffer[2] = 0x4B; 846a4d26c6aSStefan Weinhuber rcd_buffer[3] = 0xF0; 84717283b56SCornelia Huck 84817283b56SCornelia Huck ccw = cqr->cpaddr; 849a4d26c6aSStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RCD; 850a4d26c6aSStefan Weinhuber ccw->flags = 0; 85117283b56SCornelia Huck ccw->cda = (__u32)(addr_t)rcd_buffer; 852a4d26c6aSStefan Weinhuber ccw->count = DASD_ECKD_RCD_DATA_SIZE; 853a4d26c6aSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 85417283b56SCornelia Huck 8558e09f215SStefan Weinhuber cqr->startdev = device; 8568e09f215SStefan Weinhuber cqr->memdev = device; 8578e09f215SStefan Weinhuber cqr->block = NULL; 85817283b56SCornelia Huck cqr->expires = 10*HZ; 85917283b56SCornelia Huck cqr->lpm = lpm; 860eb6e199bSStefan Weinhuber cqr->retries = 256; 86117283b56SCornelia Huck cqr->buildclk = get_clock(); 86217283b56SCornelia Huck cqr->status = DASD_CQR_FILLED; 863a4d26c6aSStefan Weinhuber set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 864a4d26c6aSStefan Weinhuber } 865a4d26c6aSStefan Weinhuber 8665915a873SStefan Haberland /* 8675915a873SStefan Haberland * Wakeup helper for read_conf 8685915a873SStefan Haberland * if the cqr is not done and needs some error recovery 8695915a873SStefan Haberland * the buffer has to be re-initialized with the EBCDIC "V1.0" 8705915a873SStefan Haberland * to show support for virtual device SNEQ 8715915a873SStefan Haberland */ 8725915a873SStefan Haberland static void read_conf_cb(struct dasd_ccw_req *cqr, void *data) 8735915a873SStefan Haberland { 8745915a873SStefan Haberland struct ccw1 *ccw; 8755915a873SStefan Haberland __u8 *rcd_buffer; 8765915a873SStefan Haberland 8775915a873SStefan Haberland if (cqr->status != DASD_CQR_DONE) { 8785915a873SStefan Haberland ccw = cqr->cpaddr; 8795915a873SStefan Haberland rcd_buffer = (__u8 *)((addr_t) ccw->cda); 8805915a873SStefan Haberland memset(rcd_buffer, 0, sizeof(*rcd_buffer)); 8815915a873SStefan Haberland 8825915a873SStefan Haberland rcd_buffer[0] = 0xE5; 8835915a873SStefan Haberland rcd_buffer[1] = 0xF1; 8845915a873SStefan Haberland rcd_buffer[2] = 0x4B; 8855915a873SStefan Haberland rcd_buffer[3] = 0xF0; 8865915a873SStefan Haberland } 8875915a873SStefan Haberland dasd_wakeup_cb(cqr, data); 8885915a873SStefan Haberland } 8895915a873SStefan Haberland 890a4d26c6aSStefan Weinhuber static int dasd_eckd_read_conf_immediately(struct dasd_device *device, 891a4d26c6aSStefan Weinhuber struct dasd_ccw_req *cqr, 892a4d26c6aSStefan Weinhuber __u8 *rcd_buffer, 893a4d26c6aSStefan Weinhuber __u8 lpm) 894a4d26c6aSStefan Weinhuber { 895a4d26c6aSStefan Weinhuber struct ciw *ciw; 896a4d26c6aSStefan Weinhuber int rc; 897a4d26c6aSStefan Weinhuber /* 898a4d26c6aSStefan Weinhuber * sanity check: scan for RCD command in extended SenseID data 899a4d26c6aSStefan Weinhuber * some devices do not support RCD 900a4d26c6aSStefan Weinhuber */ 901a4d26c6aSStefan Weinhuber ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 902a4d26c6aSStefan Weinhuber if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) 903a4d26c6aSStefan Weinhuber return -EOPNOTSUPP; 904a4d26c6aSStefan Weinhuber 905a4d26c6aSStefan Weinhuber dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm); 906a4d26c6aSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 9075a27e60dSStefan Weinhuber set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 908a4d26c6aSStefan Weinhuber cqr->retries = 5; 9095915a873SStefan Haberland cqr->callback = read_conf_cb; 910a4d26c6aSStefan Weinhuber rc = dasd_sleep_on_immediatly(cqr); 911a4d26c6aSStefan Weinhuber return rc; 91217283b56SCornelia Huck } 91317283b56SCornelia Huck 91417283b56SCornelia Huck static int dasd_eckd_read_conf_lpm(struct dasd_device *device, 91517283b56SCornelia Huck void **rcd_buffer, 91617283b56SCornelia Huck int *rcd_buffer_size, __u8 lpm) 91717283b56SCornelia Huck { 91817283b56SCornelia Huck struct ciw *ciw; 91917283b56SCornelia Huck char *rcd_buf = NULL; 92017283b56SCornelia Huck int ret; 92117283b56SCornelia Huck struct dasd_ccw_req *cqr; 92217283b56SCornelia Huck 92317283b56SCornelia Huck /* 924a4d26c6aSStefan Weinhuber * sanity check: scan for RCD command in extended SenseID data 925a4d26c6aSStefan Weinhuber * some devices do not support RCD 92617283b56SCornelia Huck */ 92717283b56SCornelia Huck ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 928a4d26c6aSStefan Weinhuber if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) { 92917283b56SCornelia Huck ret = -EOPNOTSUPP; 93017283b56SCornelia Huck goto out_error; 93117283b56SCornelia Huck } 932a4d26c6aSStefan Weinhuber rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA); 93317283b56SCornelia Huck if (!rcd_buf) { 93417283b56SCornelia Huck ret = -ENOMEM; 93517283b56SCornelia Huck goto out_error; 93617283b56SCornelia Huck } 937a4d26c6aSStefan Weinhuber cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, 938a4d26c6aSStefan Weinhuber 0, /* use rcd_buf as data ara */ 939a4d26c6aSStefan Weinhuber device); 94017283b56SCornelia Huck if (IS_ERR(cqr)) { 941a4d26c6aSStefan Weinhuber DBF_DEV_EVENT(DBF_WARNING, device, "%s", 942a4d26c6aSStefan Weinhuber "Could not allocate RCD request"); 943a4d26c6aSStefan Weinhuber ret = -ENOMEM; 94417283b56SCornelia Huck goto out_error; 94517283b56SCornelia Huck } 946a4d26c6aSStefan Weinhuber dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm); 9475915a873SStefan Haberland cqr->callback = read_conf_cb; 94817283b56SCornelia Huck ret = dasd_sleep_on(cqr); 94917283b56SCornelia Huck /* 95017283b56SCornelia Huck * on success we update the user input parms 95117283b56SCornelia Huck */ 9528e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 95317283b56SCornelia Huck if (ret) 95417283b56SCornelia Huck goto out_error; 95517283b56SCornelia Huck 956a4d26c6aSStefan Weinhuber *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE; 95717283b56SCornelia Huck *rcd_buffer = rcd_buf; 95817283b56SCornelia Huck return 0; 95917283b56SCornelia Huck out_error: 96017283b56SCornelia Huck kfree(rcd_buf); 96117283b56SCornelia Huck *rcd_buffer = NULL; 96217283b56SCornelia Huck *rcd_buffer_size = 0; 96317283b56SCornelia Huck return ret; 96417283b56SCornelia Huck } 96517283b56SCornelia Huck 9664abb08c2SStefan Weinhuber static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private) 9674abb08c2SStefan Weinhuber { 9684abb08c2SStefan Weinhuber 9694abb08c2SStefan Weinhuber struct dasd_sneq *sneq; 9704abb08c2SStefan Weinhuber int i, count; 9714abb08c2SStefan Weinhuber 9724abb08c2SStefan Weinhuber private->ned = NULL; 9734abb08c2SStefan Weinhuber private->sneq = NULL; 9744abb08c2SStefan Weinhuber private->vdsneq = NULL; 9754abb08c2SStefan Weinhuber private->gneq = NULL; 9764abb08c2SStefan Weinhuber count = private->conf_len / sizeof(struct dasd_sneq); 9774abb08c2SStefan Weinhuber sneq = (struct dasd_sneq *)private->conf_data; 9784abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 9794abb08c2SStefan Weinhuber if (sneq->flags.identifier == 1 && sneq->format == 1) 9804abb08c2SStefan Weinhuber private->sneq = sneq; 9814abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 1 && sneq->format == 4) 9824abb08c2SStefan Weinhuber private->vdsneq = (struct vd_sneq *)sneq; 9834abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 2) 9844abb08c2SStefan Weinhuber private->gneq = (struct dasd_gneq *)sneq; 9854abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 3 && sneq->res1 == 1) 9864abb08c2SStefan Weinhuber private->ned = (struct dasd_ned *)sneq; 9874abb08c2SStefan Weinhuber sneq++; 9884abb08c2SStefan Weinhuber } 9894abb08c2SStefan Weinhuber if (!private->ned || !private->gneq) { 9904abb08c2SStefan Weinhuber private->ned = NULL; 9914abb08c2SStefan Weinhuber private->sneq = NULL; 9924abb08c2SStefan Weinhuber private->vdsneq = NULL; 9934abb08c2SStefan Weinhuber private->gneq = NULL; 9944abb08c2SStefan Weinhuber return -EINVAL; 9954abb08c2SStefan Weinhuber } 9964abb08c2SStefan Weinhuber return 0; 9974abb08c2SStefan Weinhuber 9984abb08c2SStefan Weinhuber }; 9994abb08c2SStefan Weinhuber 10004abb08c2SStefan Weinhuber static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len) 10014abb08c2SStefan Weinhuber { 10024abb08c2SStefan Weinhuber struct dasd_gneq *gneq; 10034abb08c2SStefan Weinhuber int i, count, found; 10044abb08c2SStefan Weinhuber 10054abb08c2SStefan Weinhuber count = conf_len / sizeof(*gneq); 10064abb08c2SStefan Weinhuber gneq = (struct dasd_gneq *)conf_data; 10074abb08c2SStefan Weinhuber found = 0; 10084abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 10094abb08c2SStefan Weinhuber if (gneq->flags.identifier == 2) { 10104abb08c2SStefan Weinhuber found = 1; 10114abb08c2SStefan Weinhuber break; 10124abb08c2SStefan Weinhuber } 10134abb08c2SStefan Weinhuber gneq++; 10144abb08c2SStefan Weinhuber } 10154abb08c2SStefan Weinhuber if (found) 10164abb08c2SStefan Weinhuber return ((char *)gneq)[18] & 0x07; 10174abb08c2SStefan Weinhuber else 10184abb08c2SStefan Weinhuber return 0; 10194abb08c2SStefan Weinhuber } 10204abb08c2SStefan Weinhuber 10214abb08c2SStefan Weinhuber static int dasd_eckd_read_conf(struct dasd_device *device) 10221da177e4SLinus Torvalds { 10231da177e4SLinus Torvalds void *conf_data; 10241da177e4SLinus Torvalds int conf_len, conf_data_saved; 10251da177e4SLinus Torvalds int rc; 1026a4d26c6aSStefan Weinhuber __u8 lpm, opm; 1027b206181dSStefan Haberland struct dasd_eckd_private *private, path_private; 1028a4d26c6aSStefan Weinhuber struct dasd_path *path_data; 1029b206181dSStefan Haberland struct dasd_uid *uid; 1030b206181dSStefan Haberland char print_path_uid[60], print_device_uid[60]; 10311da177e4SLinus Torvalds 10321da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 1033a4d26c6aSStefan Weinhuber path_data = &device->path_data; 1034a4d26c6aSStefan Weinhuber opm = ccw_device_get_path_mask(device->cdev); 10351da177e4SLinus Torvalds conf_data_saved = 0; 10361da177e4SLinus Torvalds /* get configuration data per operational path */ 10371da177e4SLinus Torvalds for (lpm = 0x80; lpm; lpm>>= 1) { 1038b206181dSStefan Haberland if (!(lpm & opm)) 1039b206181dSStefan Haberland continue; 104017283b56SCornelia Huck rc = dasd_eckd_read_conf_lpm(device, &conf_data, 10411da177e4SLinus Torvalds &conf_len, lpm); 10421da177e4SLinus Torvalds if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ 1043b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 10441da177e4SLinus Torvalds "Read configuration data returned " 1045b8ed5dd5SStefan Haberland "error %d", rc); 10461da177e4SLinus Torvalds return rc; 10471da177e4SLinus Torvalds } 10481da177e4SLinus Torvalds if (conf_data == NULL) { 1049b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1050b8ed5dd5SStefan Haberland "No configuration data " 1051b8ed5dd5SStefan Haberland "retrieved"); 1052a4d26c6aSStefan Weinhuber /* no further analysis possible */ 1053a4d26c6aSStefan Weinhuber path_data->opm |= lpm; 1054d133a960SGabriel Craciunescu continue; /* no error */ 10551da177e4SLinus Torvalds } 10561da177e4SLinus Torvalds /* save first valid configuration data */ 10571da177e4SLinus Torvalds if (!conf_data_saved) { 10584abb08c2SStefan Weinhuber kfree(private->conf_data); 10594abb08c2SStefan Weinhuber private->conf_data = conf_data; 10604abb08c2SStefan Weinhuber private->conf_len = conf_len; 10614abb08c2SStefan Weinhuber if (dasd_eckd_identify_conf_parts(private)) { 10624abb08c2SStefan Weinhuber private->conf_data = NULL; 10634abb08c2SStefan Weinhuber private->conf_len = 0; 10644abb08c2SStefan Weinhuber kfree(conf_data); 10654abb08c2SStefan Weinhuber continue; 10664abb08c2SStefan Weinhuber } 1067b206181dSStefan Haberland /* 1068b206181dSStefan Haberland * build device UID that other path data 1069b206181dSStefan Haberland * can be compared to it 1070b206181dSStefan Haberland */ 1071b206181dSStefan Haberland dasd_eckd_generate_uid(device); 10721da177e4SLinus Torvalds conf_data_saved++; 1073b206181dSStefan Haberland } else { 1074b206181dSStefan Haberland path_private.conf_data = conf_data; 1075b206181dSStefan Haberland path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1076b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts( 1077b206181dSStefan Haberland &path_private)) { 1078b206181dSStefan Haberland path_private.conf_data = NULL; 1079b206181dSStefan Haberland path_private.conf_len = 0; 1080b206181dSStefan Haberland kfree(conf_data); 1081b206181dSStefan Haberland continue; 1082b206181dSStefan Haberland } 1083b206181dSStefan Haberland 1084b206181dSStefan Haberland if (dasd_eckd_compare_path_uid( 1085b206181dSStefan Haberland device, &path_private)) { 1086b206181dSStefan Haberland uid = &path_private.uid; 1087b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1088b206181dSStefan Haberland snprintf(print_path_uid, 1089b206181dSStefan Haberland sizeof(print_path_uid), 1090b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1091b206181dSStefan Haberland uid->vendor, uid->serial, 1092b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1093b206181dSStefan Haberland uid->vduit); 1094b206181dSStefan Haberland else 1095b206181dSStefan Haberland snprintf(print_path_uid, 1096b206181dSStefan Haberland sizeof(print_path_uid), 1097b206181dSStefan Haberland "%s.%s.%04x.%02x", 1098b206181dSStefan Haberland uid->vendor, uid->serial, 1099b206181dSStefan Haberland uid->ssid, 1100b206181dSStefan Haberland uid->real_unit_addr); 1101b206181dSStefan Haberland uid = &private->uid; 1102b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1103b206181dSStefan Haberland snprintf(print_device_uid, 1104b206181dSStefan Haberland sizeof(print_device_uid), 1105b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1106b206181dSStefan Haberland uid->vendor, uid->serial, 1107b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1108b206181dSStefan Haberland uid->vduit); 1109b206181dSStefan Haberland else 1110b206181dSStefan Haberland snprintf(print_device_uid, 1111b206181dSStefan Haberland sizeof(print_device_uid), 1112b206181dSStefan Haberland "%s.%s.%04x.%02x", 1113b206181dSStefan Haberland uid->vendor, uid->serial, 1114b206181dSStefan Haberland uid->ssid, 1115b206181dSStefan Haberland uid->real_unit_addr); 1116b206181dSStefan Haberland dev_err(&device->cdev->dev, 1117b206181dSStefan Haberland "Not all channel paths lead to " 1118b206181dSStefan Haberland "the same device, path %02X leads to " 1119b206181dSStefan Haberland "device %s instead of %s\n", lpm, 1120b206181dSStefan Haberland print_path_uid, print_device_uid); 1121b206181dSStefan Haberland return -EINVAL; 1122b206181dSStefan Haberland } 1123b206181dSStefan Haberland 1124b206181dSStefan Haberland path_private.conf_data = NULL; 1125b206181dSStefan Haberland path_private.conf_len = 0; 11261da177e4SLinus Torvalds } 11274abb08c2SStefan Weinhuber switch (dasd_eckd_path_access(conf_data, conf_len)) { 11281da177e4SLinus Torvalds case 0x02: 11291da177e4SLinus Torvalds path_data->npm |= lpm; 11301da177e4SLinus Torvalds break; 11311da177e4SLinus Torvalds case 0x03: 11321da177e4SLinus Torvalds path_data->ppm |= lpm; 11331da177e4SLinus Torvalds break; 11341da177e4SLinus Torvalds } 1135a4d26c6aSStefan Weinhuber path_data->opm |= lpm; 1136b206181dSStefan Haberland 11374abb08c2SStefan Weinhuber if (conf_data != private->conf_data) 11381da177e4SLinus Torvalds kfree(conf_data); 11391da177e4SLinus Torvalds } 1140b206181dSStefan Haberland 11411da177e4SLinus Torvalds return 0; 11421da177e4SLinus Torvalds } 11431da177e4SLinus Torvalds 1144a4d26c6aSStefan Weinhuber static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm) 1145a4d26c6aSStefan Weinhuber { 1146a4d26c6aSStefan Weinhuber struct dasd_eckd_private *private; 1147a4d26c6aSStefan Weinhuber int mdc; 1148a4d26c6aSStefan Weinhuber u32 fcx_max_data; 1149a4d26c6aSStefan Weinhuber 1150a4d26c6aSStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 1151a4d26c6aSStefan Weinhuber if (private->fcx_max_data) { 1152a4d26c6aSStefan Weinhuber mdc = ccw_device_get_mdc(device->cdev, lpm); 1153a4d26c6aSStefan Weinhuber if ((mdc < 0)) { 1154a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1155a4d26c6aSStefan Weinhuber "Detecting the maximum data size for zHPF " 1156a4d26c6aSStefan Weinhuber "requests failed (rc=%d) for a new path %x\n", 1157a4d26c6aSStefan Weinhuber mdc, lpm); 1158a4d26c6aSStefan Weinhuber return mdc; 1159a4d26c6aSStefan Weinhuber } 1160a4d26c6aSStefan Weinhuber fcx_max_data = mdc * FCX_MAX_DATA_FACTOR; 1161a4d26c6aSStefan Weinhuber if (fcx_max_data < private->fcx_max_data) { 1162a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1163a4d26c6aSStefan Weinhuber "The maximum data size for zHPF requests %u " 1164a4d26c6aSStefan Weinhuber "on a new path %x is below the active maximum " 1165a4d26c6aSStefan Weinhuber "%u\n", fcx_max_data, lpm, 1166a4d26c6aSStefan Weinhuber private->fcx_max_data); 1167a4d26c6aSStefan Weinhuber return -EACCES; 1168a4d26c6aSStefan Weinhuber } 1169a4d26c6aSStefan Weinhuber } 1170a4d26c6aSStefan Weinhuber return 0; 1171a4d26c6aSStefan Weinhuber } 1172a4d26c6aSStefan Weinhuber 1173b206181dSStefan Haberland static int rebuild_device_uid(struct dasd_device *device, 1174b206181dSStefan Haberland struct path_verification_work_data *data) 1175b206181dSStefan Haberland { 1176b206181dSStefan Haberland struct dasd_eckd_private *private; 1177b206181dSStefan Haberland struct dasd_path *path_data; 1178b206181dSStefan Haberland __u8 lpm, opm; 1179b206181dSStefan Haberland int rc; 1180b206181dSStefan Haberland 1181b206181dSStefan Haberland rc = -ENODEV; 1182b206181dSStefan Haberland private = (struct dasd_eckd_private *) device->private; 1183b206181dSStefan Haberland path_data = &device->path_data; 1184b206181dSStefan Haberland opm = device->path_data.opm; 1185b206181dSStefan Haberland 1186b206181dSStefan Haberland for (lpm = 0x80; lpm; lpm >>= 1) { 1187b206181dSStefan Haberland if (!(lpm & opm)) 1188b206181dSStefan Haberland continue; 1189b206181dSStefan Haberland memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1190b206181dSStefan Haberland memset(&data->cqr, 0, sizeof(data->cqr)); 1191b206181dSStefan Haberland data->cqr.cpaddr = &data->ccw; 1192b206181dSStefan Haberland rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1193b206181dSStefan Haberland data->rcd_buffer, 1194b206181dSStefan Haberland lpm); 1195b206181dSStefan Haberland 1196b206181dSStefan Haberland if (rc) { 1197b206181dSStefan Haberland if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */ 1198b206181dSStefan Haberland continue; 1199b206181dSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1200b206181dSStefan Haberland "Read configuration data " 1201b206181dSStefan Haberland "returned error %d", rc); 1202b206181dSStefan Haberland break; 1203b206181dSStefan Haberland } 1204b206181dSStefan Haberland memcpy(private->conf_data, data->rcd_buffer, 1205b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE); 1206b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts(private)) { 1207b206181dSStefan Haberland rc = -ENODEV; 1208b206181dSStefan Haberland } else /* first valid path is enough */ 1209b206181dSStefan Haberland break; 1210b206181dSStefan Haberland } 1211b206181dSStefan Haberland 1212b206181dSStefan Haberland if (!rc) 1213b206181dSStefan Haberland rc = dasd_eckd_generate_uid(device); 1214b206181dSStefan Haberland 1215b206181dSStefan Haberland return rc; 1216b206181dSStefan Haberland } 1217b206181dSStefan Haberland 1218a4d26c6aSStefan Weinhuber static void do_path_verification_work(struct work_struct *work) 1219a4d26c6aSStefan Weinhuber { 1220a4d26c6aSStefan Weinhuber struct path_verification_work_data *data; 1221a4d26c6aSStefan Weinhuber struct dasd_device *device; 1222b206181dSStefan Haberland struct dasd_eckd_private path_private; 1223b206181dSStefan Haberland struct dasd_uid *uid; 1224b206181dSStefan Haberland __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE]; 1225a4d26c6aSStefan Weinhuber __u8 lpm, opm, npm, ppm, epm; 1226a4d26c6aSStefan Weinhuber unsigned long flags; 1227b206181dSStefan Haberland char print_uid[60]; 1228a4d26c6aSStefan Weinhuber int rc; 1229a4d26c6aSStefan Weinhuber 1230a4d26c6aSStefan Weinhuber data = container_of(work, struct path_verification_work_data, worker); 1231a4d26c6aSStefan Weinhuber device = data->device; 1232a4d26c6aSStefan Weinhuber 1233c8d1c0ffSStefan Haberland /* delay path verification until device was resumed */ 1234c8d1c0ffSStefan Haberland if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 1235c8d1c0ffSStefan Haberland schedule_work(work); 1236c8d1c0ffSStefan Haberland return; 1237c8d1c0ffSStefan Haberland } 1238c8d1c0ffSStefan Haberland 1239a4d26c6aSStefan Weinhuber opm = 0; 1240a4d26c6aSStefan Weinhuber npm = 0; 1241a4d26c6aSStefan Weinhuber ppm = 0; 1242a4d26c6aSStefan Weinhuber epm = 0; 1243a4d26c6aSStefan Weinhuber for (lpm = 0x80; lpm; lpm >>= 1) { 1244b206181dSStefan Haberland if (!(lpm & data->tbvpm)) 1245b206181dSStefan Haberland continue; 1246b206181dSStefan Haberland memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1247a4d26c6aSStefan Weinhuber memset(&data->cqr, 0, sizeof(data->cqr)); 1248a4d26c6aSStefan Weinhuber data->cqr.cpaddr = &data->ccw; 1249a4d26c6aSStefan Weinhuber rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1250a4d26c6aSStefan Weinhuber data->rcd_buffer, 1251a4d26c6aSStefan Weinhuber lpm); 1252a4d26c6aSStefan Weinhuber if (!rc) { 1253a4d26c6aSStefan Weinhuber switch (dasd_eckd_path_access(data->rcd_buffer, 1254b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE) 1255b206181dSStefan Haberland ) { 1256a4d26c6aSStefan Weinhuber case 0x02: 1257a4d26c6aSStefan Weinhuber npm |= lpm; 1258a4d26c6aSStefan Weinhuber break; 1259a4d26c6aSStefan Weinhuber case 0x03: 1260a4d26c6aSStefan Weinhuber ppm |= lpm; 1261a4d26c6aSStefan Weinhuber break; 1262a4d26c6aSStefan Weinhuber } 1263a4d26c6aSStefan Weinhuber opm |= lpm; 1264a4d26c6aSStefan Weinhuber } else if (rc == -EOPNOTSUPP) { 1265a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1266a4d26c6aSStefan Weinhuber "path verification: No configuration " 1267a4d26c6aSStefan Weinhuber "data retrieved"); 1268a4d26c6aSStefan Weinhuber opm |= lpm; 1269a4d26c6aSStefan Weinhuber } else if (rc == -EAGAIN) { 1270a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1271a4d26c6aSStefan Weinhuber "path verification: device is stopped," 1272a4d26c6aSStefan Weinhuber " try again later"); 1273a4d26c6aSStefan Weinhuber epm |= lpm; 1274a4d26c6aSStefan Weinhuber } else { 1275a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1276a4d26c6aSStefan Weinhuber "Reading device feature codes failed " 1277a4d26c6aSStefan Weinhuber "(rc=%d) for new path %x\n", rc, lpm); 1278a4d26c6aSStefan Weinhuber continue; 1279a4d26c6aSStefan Weinhuber } 1280a4d26c6aSStefan Weinhuber if (verify_fcx_max_data(device, lpm)) { 1281a4d26c6aSStefan Weinhuber opm &= ~lpm; 1282a4d26c6aSStefan Weinhuber npm &= ~lpm; 1283a4d26c6aSStefan Weinhuber ppm &= ~lpm; 1284b206181dSStefan Haberland continue; 1285b206181dSStefan Haberland } 1286b206181dSStefan Haberland 1287b206181dSStefan Haberland /* 1288b206181dSStefan Haberland * save conf_data for comparison after 1289b206181dSStefan Haberland * rebuild_device_uid may have changed 1290b206181dSStefan Haberland * the original data 1291b206181dSStefan Haberland */ 1292b206181dSStefan Haberland memcpy(&path_rcd_buf, data->rcd_buffer, 1293b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE); 1294b206181dSStefan Haberland path_private.conf_data = (void *) &path_rcd_buf; 1295b206181dSStefan Haberland path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1296b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts(&path_private)) { 1297b206181dSStefan Haberland path_private.conf_data = NULL; 1298b206181dSStefan Haberland path_private.conf_len = 0; 1299b206181dSStefan Haberland continue; 1300b206181dSStefan Haberland } 1301b206181dSStefan Haberland 1302b206181dSStefan Haberland /* 1303b206181dSStefan Haberland * compare path UID with device UID only if at least 1304b206181dSStefan Haberland * one valid path is left 1305b206181dSStefan Haberland * in other case the device UID may have changed and 1306b206181dSStefan Haberland * the first working path UID will be used as device UID 1307b206181dSStefan Haberland */ 1308b206181dSStefan Haberland if (device->path_data.opm && 1309b206181dSStefan Haberland dasd_eckd_compare_path_uid(device, &path_private)) { 1310b206181dSStefan Haberland /* 1311b206181dSStefan Haberland * the comparison was not successful 1312b206181dSStefan Haberland * rebuild the device UID with at least one 1313b206181dSStefan Haberland * known path in case a z/VM hyperswap command 1314b206181dSStefan Haberland * has changed the device 1315b206181dSStefan Haberland * 1316b206181dSStefan Haberland * after this compare again 1317b206181dSStefan Haberland * 1318b206181dSStefan Haberland * if either the rebuild or the recompare fails 1319b206181dSStefan Haberland * the path can not be used 1320b206181dSStefan Haberland */ 1321b206181dSStefan Haberland if (rebuild_device_uid(device, data) || 1322b206181dSStefan Haberland dasd_eckd_compare_path_uid( 1323b206181dSStefan Haberland device, &path_private)) { 1324b206181dSStefan Haberland uid = &path_private.uid; 1325b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1326b206181dSStefan Haberland snprintf(print_uid, sizeof(print_uid), 1327b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1328b206181dSStefan Haberland uid->vendor, uid->serial, 1329b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1330b206181dSStefan Haberland uid->vduit); 1331b206181dSStefan Haberland else 1332b206181dSStefan Haberland snprintf(print_uid, sizeof(print_uid), 1333b206181dSStefan Haberland "%s.%s.%04x.%02x", 1334b206181dSStefan Haberland uid->vendor, uid->serial, 1335b206181dSStefan Haberland uid->ssid, 1336b206181dSStefan Haberland uid->real_unit_addr); 1337b206181dSStefan Haberland dev_err(&device->cdev->dev, 1338b206181dSStefan Haberland "The newly added channel path %02X " 1339b206181dSStefan Haberland "will not be used because it leads " 1340b206181dSStefan Haberland "to a different device %s\n", 1341b206181dSStefan Haberland lpm, print_uid); 1342b206181dSStefan Haberland opm &= ~lpm; 1343b206181dSStefan Haberland npm &= ~lpm; 1344b206181dSStefan Haberland ppm &= ~lpm; 1345b206181dSStefan Haberland continue; 1346a4d26c6aSStefan Weinhuber } 1347a4d26c6aSStefan Weinhuber } 1348b206181dSStefan Haberland 1349a4d26c6aSStefan Weinhuber /* 1350a4d26c6aSStefan Weinhuber * There is a small chance that a path is lost again between 1351a4d26c6aSStefan Weinhuber * above path verification and the following modification of 1352a4d26c6aSStefan Weinhuber * the device opm mask. We could avoid that race here by using 1353a4d26c6aSStefan Weinhuber * yet another path mask, but we rather deal with this unlikely 1354a4d26c6aSStefan Weinhuber * situation in dasd_start_IO. 1355a4d26c6aSStefan Weinhuber */ 1356a4d26c6aSStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1357a4d26c6aSStefan Weinhuber if (!device->path_data.opm && opm) { 1358a4d26c6aSStefan Weinhuber device->path_data.opm = opm; 1359a4d26c6aSStefan Weinhuber dasd_generic_path_operational(device); 1360a4d26c6aSStefan Weinhuber } else 1361a4d26c6aSStefan Weinhuber device->path_data.opm |= opm; 1362a4d26c6aSStefan Weinhuber device->path_data.npm |= npm; 1363a4d26c6aSStefan Weinhuber device->path_data.ppm |= ppm; 1364a4d26c6aSStefan Weinhuber device->path_data.tbvpm |= epm; 1365a4d26c6aSStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1366b206181dSStefan Haberland } 1367a4d26c6aSStefan Weinhuber 1368a4d26c6aSStefan Weinhuber dasd_put_device(device); 1369a4d26c6aSStefan Weinhuber if (data->isglobal) 1370a4d26c6aSStefan Weinhuber mutex_unlock(&dasd_path_verification_mutex); 1371a4d26c6aSStefan Weinhuber else 1372a4d26c6aSStefan Weinhuber kfree(data); 1373a4d26c6aSStefan Weinhuber } 1374a4d26c6aSStefan Weinhuber 1375a4d26c6aSStefan Weinhuber static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm) 1376a4d26c6aSStefan Weinhuber { 1377a4d26c6aSStefan Weinhuber struct path_verification_work_data *data; 1378a4d26c6aSStefan Weinhuber 1379a4d26c6aSStefan Weinhuber data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA); 1380a4d26c6aSStefan Weinhuber if (!data) { 1381a4d26c6aSStefan Weinhuber if (mutex_trylock(&dasd_path_verification_mutex)) { 1382a4d26c6aSStefan Weinhuber data = path_verification_worker; 1383a4d26c6aSStefan Weinhuber data->isglobal = 1; 1384a4d26c6aSStefan Weinhuber } else 1385a4d26c6aSStefan Weinhuber return -ENOMEM; 1386a4d26c6aSStefan Weinhuber } else { 1387a4d26c6aSStefan Weinhuber memset(data, 0, sizeof(*data)); 1388a4d26c6aSStefan Weinhuber data->isglobal = 0; 1389a4d26c6aSStefan Weinhuber } 1390a4d26c6aSStefan Weinhuber INIT_WORK(&data->worker, do_path_verification_work); 1391a4d26c6aSStefan Weinhuber dasd_get_device(device); 1392a4d26c6aSStefan Weinhuber data->device = device; 1393a4d26c6aSStefan Weinhuber data->tbvpm = lpm; 1394a4d26c6aSStefan Weinhuber schedule_work(&data->worker); 1395a4d26c6aSStefan Weinhuber return 0; 1396a4d26c6aSStefan Weinhuber } 1397a4d26c6aSStefan Weinhuber 13988e09f215SStefan Weinhuber static int dasd_eckd_read_features(struct dasd_device *device) 13998e09f215SStefan Weinhuber { 14008e09f215SStefan Weinhuber struct dasd_psf_prssd_data *prssdp; 14018e09f215SStefan Weinhuber struct dasd_rssd_features *features; 14028e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 14038e09f215SStefan Weinhuber struct ccw1 *ccw; 14048e09f215SStefan Weinhuber int rc; 14058e09f215SStefan Weinhuber struct dasd_eckd_private *private; 14068e09f215SStefan Weinhuber 14078e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 140868d1e5f0SStefan Weinhuber memset(&private->features, 0, sizeof(struct dasd_rssd_features)); 140968b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 14108e09f215SStefan Weinhuber (sizeof(struct dasd_psf_prssd_data) + 14118e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)), 14128e09f215SStefan Weinhuber device); 14138e09f215SStefan Weinhuber if (IS_ERR(cqr)) { 1414b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " 1415b8ed5dd5SStefan Haberland "allocate initialization request"); 14168e09f215SStefan Weinhuber return PTR_ERR(cqr); 14178e09f215SStefan Weinhuber } 14188e09f215SStefan Weinhuber cqr->startdev = device; 14198e09f215SStefan Weinhuber cqr->memdev = device; 14208e09f215SStefan Weinhuber cqr->block = NULL; 1421eb6e199bSStefan Weinhuber cqr->retries = 256; 14228e09f215SStefan Weinhuber cqr->expires = 10 * HZ; 14238e09f215SStefan Weinhuber 14248e09f215SStefan Weinhuber /* Prepare for Read Subsystem Data */ 14258e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 14268e09f215SStefan Weinhuber memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 14278e09f215SStefan Weinhuber prssdp->order = PSF_ORDER_PRSSD; 14288e09f215SStefan Weinhuber prssdp->suborder = 0x41; /* Read Feature Codes */ 14298e09f215SStefan Weinhuber /* all other bytes of prssdp must be zero */ 14308e09f215SStefan Weinhuber 14318e09f215SStefan Weinhuber ccw = cqr->cpaddr; 14328e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PSF; 14338e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_psf_prssd_data); 14348e09f215SStefan Weinhuber ccw->flags |= CCW_FLAG_CC; 14358e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) prssdp; 14368e09f215SStefan Weinhuber 14378e09f215SStefan Weinhuber /* Read Subsystem Data - feature codes */ 14388e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 14398e09f215SStefan Weinhuber memset(features, 0, sizeof(struct dasd_rssd_features)); 14408e09f215SStefan Weinhuber 14418e09f215SStefan Weinhuber ccw++; 14428e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RSSD; 14438e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_rssd_features); 14448e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) features; 14458e09f215SStefan Weinhuber 14468e09f215SStefan Weinhuber cqr->buildclk = get_clock(); 14478e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 14488e09f215SStefan Weinhuber rc = dasd_sleep_on(cqr); 14498e09f215SStefan Weinhuber if (rc == 0) { 14508e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 14518e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 14528e09f215SStefan Weinhuber memcpy(&private->features, features, 14538e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)); 145468d1e5f0SStefan Weinhuber } else 145568d1e5f0SStefan Weinhuber dev_warn(&device->cdev->dev, "Reading device feature codes" 145668d1e5f0SStefan Weinhuber " failed with rc=%d\n", rc); 14578e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 14588e09f215SStefan Weinhuber return rc; 14598e09f215SStefan Weinhuber } 14608e09f215SStefan Weinhuber 14618e09f215SStefan Weinhuber 14623d052595SHorst Hummel /* 146340545573SHorst Hummel * Build CP for Perform Subsystem Function - SSC. 146440545573SHorst Hummel */ 1465f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, 1466f3eb5384SStefan Weinhuber int enable_pav) 146740545573SHorst Hummel { 146840545573SHorst Hummel struct dasd_ccw_req *cqr; 146940545573SHorst Hummel struct dasd_psf_ssc_data *psf_ssc_data; 147040545573SHorst Hummel struct ccw1 *ccw; 147140545573SHorst Hummel 147268b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 147340545573SHorst Hummel sizeof(struct dasd_psf_ssc_data), 147440545573SHorst Hummel device); 147540545573SHorst Hummel 147640545573SHorst Hummel if (IS_ERR(cqr)) { 1477fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 147840545573SHorst Hummel "Could not allocate PSF-SSC request"); 147940545573SHorst Hummel return cqr; 148040545573SHorst Hummel } 148140545573SHorst Hummel psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 148240545573SHorst Hummel psf_ssc_data->order = PSF_ORDER_SSC; 1483626350b6SStefan Weinhuber psf_ssc_data->suborder = 0xc0; 1484f3eb5384SStefan Weinhuber if (enable_pav) { 1485626350b6SStefan Weinhuber psf_ssc_data->suborder |= 0x08; 14868e09f215SStefan Weinhuber psf_ssc_data->reserved[0] = 0x88; 1487f3eb5384SStefan Weinhuber } 148840545573SHorst Hummel ccw = cqr->cpaddr; 148940545573SHorst Hummel ccw->cmd_code = DASD_ECKD_CCW_PSF; 149040545573SHorst Hummel ccw->cda = (__u32)(addr_t)psf_ssc_data; 149140545573SHorst Hummel ccw->count = 66; 149240545573SHorst Hummel 14938e09f215SStefan Weinhuber cqr->startdev = device; 14948e09f215SStefan Weinhuber cqr->memdev = device; 14958e09f215SStefan Weinhuber cqr->block = NULL; 1496eb6e199bSStefan Weinhuber cqr->retries = 256; 149740545573SHorst Hummel cqr->expires = 10*HZ; 149840545573SHorst Hummel cqr->buildclk = get_clock(); 149940545573SHorst Hummel cqr->status = DASD_CQR_FILLED; 150040545573SHorst Hummel return cqr; 150140545573SHorst Hummel } 150240545573SHorst Hummel 150340545573SHorst Hummel /* 150440545573SHorst Hummel * Perform Subsystem Function. 150540545573SHorst Hummel * It is necessary to trigger CIO for channel revalidation since this 150640545573SHorst Hummel * call might change behaviour of DASD devices. 150740545573SHorst Hummel */ 150840545573SHorst Hummel static int 150912d7b107SStefan Haberland dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav, 151012d7b107SStefan Haberland unsigned long flags) 151140545573SHorst Hummel { 151240545573SHorst Hummel struct dasd_ccw_req *cqr; 151340545573SHorst Hummel int rc; 151440545573SHorst Hummel 1515f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_psf_ssc(device, enable_pav); 151640545573SHorst Hummel if (IS_ERR(cqr)) 151740545573SHorst Hummel return PTR_ERR(cqr); 151840545573SHorst Hummel 151912d7b107SStefan Haberland /* 152012d7b107SStefan Haberland * set flags e.g. turn on failfast, to prevent blocking 152112d7b107SStefan Haberland * the calling function should handle failed requests 152212d7b107SStefan Haberland */ 152312d7b107SStefan Haberland cqr->flags |= flags; 152412d7b107SStefan Haberland 152540545573SHorst Hummel rc = dasd_sleep_on(cqr); 152640545573SHorst Hummel if (!rc) 152740545573SHorst Hummel /* trigger CIO to reprobe devices */ 152840545573SHorst Hummel css_schedule_reprobe(); 152912d7b107SStefan Haberland else if (cqr->intrc == -EAGAIN) 153012d7b107SStefan Haberland rc = -EAGAIN; 153112d7b107SStefan Haberland 15328e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 153340545573SHorst Hummel return rc; 153440545573SHorst Hummel } 153540545573SHorst Hummel 153640545573SHorst Hummel /* 153740545573SHorst Hummel * Valide storage server of current device. 153840545573SHorst Hummel */ 153912d7b107SStefan Haberland static int dasd_eckd_validate_server(struct dasd_device *device, 154012d7b107SStefan Haberland unsigned long flags) 154140545573SHorst Hummel { 154240545573SHorst Hummel int rc; 15438e09f215SStefan Weinhuber struct dasd_eckd_private *private; 1544f3eb5384SStefan Weinhuber int enable_pav; 154540545573SHorst Hummel 1546f9f8d02fSStefan Haberland private = (struct dasd_eckd_private *) device->private; 1547f9f8d02fSStefan Haberland if (private->uid.type == UA_BASE_PAV_ALIAS || 1548f9f8d02fSStefan Haberland private->uid.type == UA_HYPER_PAV_ALIAS) 154912d7b107SStefan Haberland return 0; 155040545573SHorst Hummel if (dasd_nopav || MACHINE_IS_VM) 1551f3eb5384SStefan Weinhuber enable_pav = 0; 1552f3eb5384SStefan Weinhuber else 1553f3eb5384SStefan Weinhuber enable_pav = 1; 155412d7b107SStefan Haberland rc = dasd_eckd_psf_ssc(device, enable_pav, flags); 1555eb6e199bSStefan Weinhuber 155640545573SHorst Hummel /* may be requested feature is not available on server, 155740545573SHorst Hummel * therefore just report error and go ahead */ 1558b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " 1559b8ed5dd5SStefan Haberland "returned rc=%d", private->uid.ssid, rc); 156012d7b107SStefan Haberland return rc; 156140545573SHorst Hummel } 156240545573SHorst Hummel 1563f1633031SStefan Haberland /* 1564f1633031SStefan Haberland * worker to do a validate server in case of a lost pathgroup 1565f1633031SStefan Haberland */ 1566f1633031SStefan Haberland static void dasd_eckd_do_validate_server(struct work_struct *work) 1567f1633031SStefan Haberland { 1568f1633031SStefan Haberland struct dasd_device *device = container_of(work, struct dasd_device, 1569f1633031SStefan Haberland kick_validate); 157012d7b107SStefan Haberland if (dasd_eckd_validate_server(device, DASD_CQR_FLAGS_FAILFAST) 157112d7b107SStefan Haberland == -EAGAIN) { 157212d7b107SStefan Haberland /* schedule worker again if failed */ 157312d7b107SStefan Haberland schedule_work(&device->kick_validate); 157412d7b107SStefan Haberland return; 157512d7b107SStefan Haberland } 157612d7b107SStefan Haberland 1577f1633031SStefan Haberland dasd_put_device(device); 1578f1633031SStefan Haberland } 1579f1633031SStefan Haberland 1580f1633031SStefan Haberland static void dasd_eckd_kick_validate_server(struct dasd_device *device) 1581f1633031SStefan Haberland { 1582f1633031SStefan Haberland dasd_get_device(device); 158325e2cf1cSStefan Haberland /* exit if device not online or in offline processing */ 158425e2cf1cSStefan Haberland if (test_bit(DASD_FLAG_OFFLINE, &device->flags) || 158525e2cf1cSStefan Haberland device->state < DASD_STATE_ONLINE) { 158625e2cf1cSStefan Haberland dasd_put_device(device); 158725e2cf1cSStefan Haberland return; 158825e2cf1cSStefan Haberland } 1589f1633031SStefan Haberland /* queue call to do_validate_server to the kernel event daemon. */ 1590f1633031SStefan Haberland schedule_work(&device->kick_validate); 1591f1633031SStefan Haberland } 1592f1633031SStefan Haberland 1593ef19298bSStefan Weinhuber static u32 get_fcx_max_data(struct dasd_device *device) 1594ef19298bSStefan Weinhuber { 1595ef19298bSStefan Weinhuber #if defined(CONFIG_64BIT) 1596ef19298bSStefan Weinhuber int tpm, mdc; 1597ef19298bSStefan Weinhuber int fcx_in_css, fcx_in_gneq, fcx_in_features; 1598ef19298bSStefan Weinhuber struct dasd_eckd_private *private; 1599ef19298bSStefan Weinhuber 1600ef19298bSStefan Weinhuber if (dasd_nofcx) 1601ef19298bSStefan Weinhuber return 0; 1602ef19298bSStefan Weinhuber /* is transport mode supported? */ 1603ef19298bSStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 1604ef19298bSStefan Weinhuber fcx_in_css = css_general_characteristics.fcx; 1605ef19298bSStefan Weinhuber fcx_in_gneq = private->gneq->reserved2[7] & 0x04; 1606ef19298bSStefan Weinhuber fcx_in_features = private->features.feature[40] & 0x80; 1607ef19298bSStefan Weinhuber tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; 1608ef19298bSStefan Weinhuber 1609ef19298bSStefan Weinhuber if (!tpm) 1610ef19298bSStefan Weinhuber return 0; 1611ef19298bSStefan Weinhuber 1612ef19298bSStefan Weinhuber mdc = ccw_device_get_mdc(device->cdev, 0); 1613ef19298bSStefan Weinhuber if (mdc < 0) { 1614ef19298bSStefan Weinhuber dev_warn(&device->cdev->dev, "Detecting the maximum supported" 1615ef19298bSStefan Weinhuber " data size for zHPF requests failed\n"); 1616ef19298bSStefan Weinhuber return 0; 1617ef19298bSStefan Weinhuber } else 1618ef19298bSStefan Weinhuber return mdc * FCX_MAX_DATA_FACTOR; 1619ef19298bSStefan Weinhuber #else 1620ef19298bSStefan Weinhuber return 0; 1621ef19298bSStefan Weinhuber #endif 1622ef19298bSStefan Weinhuber } 1623ef19298bSStefan Weinhuber 162440545573SHorst Hummel /* 16253d052595SHorst Hummel * Check device characteristics. 16263d052595SHorst Hummel * If the device is accessible using ECKD discipline, the device is enabled. 16273d052595SHorst Hummel */ 16281da177e4SLinus Torvalds static int 16291da177e4SLinus Torvalds dasd_eckd_check_characteristics(struct dasd_device *device) 16301da177e4SLinus Torvalds { 16311da177e4SLinus Torvalds struct dasd_eckd_private *private; 16328e09f215SStefan Weinhuber struct dasd_block *block; 16332dedf0d9SStefan Haberland struct dasd_uid temp_uid; 1634f9f8d02fSStefan Haberland int rc, i; 163533b62a30SStefan Weinhuber int readonly; 16367c8faa86SStefan Haberland unsigned long value; 16371da177e4SLinus Torvalds 1638f1633031SStefan Haberland /* setup work queue for validate server*/ 1639f1633031SStefan Haberland INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server); 1640f1633031SStefan Haberland 1641454e1fa1SPeter Oberparleiter if (!ccw_device_is_pathgroup(device->cdev)) { 1642454e1fa1SPeter Oberparleiter dev_warn(&device->cdev->dev, 1643454e1fa1SPeter Oberparleiter "A channel path group could not be established\n"); 1644454e1fa1SPeter Oberparleiter return -EIO; 1645454e1fa1SPeter Oberparleiter } 1646454e1fa1SPeter Oberparleiter if (!ccw_device_is_multipath(device->cdev)) { 1647454e1fa1SPeter Oberparleiter dev_info(&device->cdev->dev, 1648454e1fa1SPeter Oberparleiter "The DASD is not operating in multipath mode\n"); 1649454e1fa1SPeter Oberparleiter } 16501da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 165192636b15SSebastian Ott if (!private) { 165292636b15SSebastian Ott private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); 165392636b15SSebastian Ott if (!private) { 1654fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1655fc19f381SStefan Haberland "Allocating memory for private DASD data " 1656fc19f381SStefan Haberland "failed\n"); 16571da177e4SLinus Torvalds return -ENOMEM; 16581da177e4SLinus Torvalds } 16591da177e4SLinus Torvalds device->private = (void *) private; 166092636b15SSebastian Ott } else { 166192636b15SSebastian Ott memset(private, 0, sizeof(*private)); 16621da177e4SLinus Torvalds } 16631da177e4SLinus Torvalds /* Invalidate status of initial analysis. */ 16641da177e4SLinus Torvalds private->init_cqr_status = -1; 16651da177e4SLinus Torvalds /* Set default cache operations. */ 16661da177e4SLinus Torvalds private->attrib.operation = DASD_NORMAL_CACHE; 16671da177e4SLinus Torvalds private->attrib.nr_cyl = 0; 16681da177e4SLinus Torvalds 166940545573SHorst Hummel /* Read Configuration Data */ 167040545573SHorst Hummel rc = dasd_eckd_read_conf(device); 167140545573SHorst Hummel if (rc) 16728e09f215SStefan Weinhuber goto out_err1; 167340545573SHorst Hummel 16747c8faa86SStefan Haberland /* set default timeout */ 16757c8faa86SStefan Haberland device->default_expires = DASD_EXPIRES; 16767c8faa86SStefan Haberland if (private->gneq) { 16777c8faa86SStefan Haberland value = 1; 16787c8faa86SStefan Haberland for (i = 0; i < private->gneq->timeout.value; i++) 16797c8faa86SStefan Haberland value = 10 * value; 16807c8faa86SStefan Haberland value = value * private->gneq->timeout.number; 16817c8faa86SStefan Haberland /* do not accept useless values */ 16827c8faa86SStefan Haberland if (value != 0 && value <= DASD_EXPIRES_MAX) 16837c8faa86SStefan Haberland device->default_expires = value; 16847c8faa86SStefan Haberland } 16857c8faa86SStefan Haberland 16862dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 16872dedf0d9SStefan Haberland if (temp_uid.type == UA_BASE_DEVICE) { 16888e09f215SStefan Weinhuber block = dasd_alloc_block(); 16898e09f215SStefan Weinhuber if (IS_ERR(block)) { 1690b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1691b8ed5dd5SStefan Haberland "could not allocate dasd " 1692b8ed5dd5SStefan Haberland "block structure"); 16938e09f215SStefan Weinhuber rc = PTR_ERR(block); 16948e09f215SStefan Weinhuber goto out_err1; 16958e09f215SStefan Weinhuber } 16968e09f215SStefan Weinhuber device->block = block; 16978e09f215SStefan Weinhuber block->base = device; 16988e09f215SStefan Weinhuber } 16998e09f215SStefan Weinhuber 1700f9f8d02fSStefan Haberland /* register lcu with alias handling, enable PAV */ 1701f9f8d02fSStefan Haberland rc = dasd_alias_make_device_known_to_lcu(device); 1702f9f8d02fSStefan Haberland if (rc) 17038e09f215SStefan Weinhuber goto out_err2; 1704f9f8d02fSStefan Haberland 170512d7b107SStefan Haberland dasd_eckd_validate_server(device, 0); 1706f4ac1d02SStefan Weinhuber 1707f4ac1d02SStefan Weinhuber /* device may report different configuration data after LCU setup */ 1708f4ac1d02SStefan Weinhuber rc = dasd_eckd_read_conf(device); 170940545573SHorst Hummel if (rc) 17108e09f215SStefan Weinhuber goto out_err3; 17118e09f215SStefan Weinhuber 17128e09f215SStefan Weinhuber /* Read Feature Codes */ 171368d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 171440545573SHorst Hummel 17151da177e4SLinus Torvalds /* Read Device Characteristics */ 171668b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 171768b781feSStefan Haberland &private->rdc_data, 64); 17188e09f215SStefan Weinhuber if (rc) { 1719b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1720b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 17218e09f215SStefan Weinhuber goto out_err3; 17228e09f215SStefan Weinhuber } 172334cd551aSStefan Haberland 172434cd551aSStefan Haberland if ((device->features & DASD_FEATURE_USERAW) && 172534cd551aSStefan Haberland !(private->rdc_data.facilities.RT_in_LR)) { 172634cd551aSStefan Haberland dev_err(&device->cdev->dev, "The storage server does not " 172734cd551aSStefan Haberland "support raw-track access\n"); 172834cd551aSStefan Haberland rc = -EINVAL; 172934cd551aSStefan Haberland goto out_err3; 173034cd551aSStefan Haberland } 173134cd551aSStefan Haberland 1732817f2c84SNikanth Karthikesan /* find the valid cylinder size */ 1733b44b0ab3SStefan Weinhuber if (private->rdc_data.no_cyl == LV_COMPAT_CYL && 1734b44b0ab3SStefan Weinhuber private->rdc_data.long_no_cyl) 1735b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.long_no_cyl; 1736b44b0ab3SStefan Weinhuber else 1737b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.no_cyl; 1738b44b0ab3SStefan Weinhuber 1739ef19298bSStefan Weinhuber private->fcx_max_data = get_fcx_max_data(device); 1740ef19298bSStefan Weinhuber 174133b62a30SStefan Weinhuber readonly = dasd_device_is_ro(device); 174233b62a30SStefan Weinhuber if (readonly) 174333b62a30SStefan Weinhuber set_bit(DASD_FLAG_DEVICE_RO, &device->flags); 174433b62a30SStefan Weinhuber 1745fc19f381SStefan Haberland dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " 174633b62a30SStefan Weinhuber "with %d cylinders, %d heads, %d sectors%s\n", 17471da177e4SLinus Torvalds private->rdc_data.dev_type, 17481da177e4SLinus Torvalds private->rdc_data.dev_model, 17491da177e4SLinus Torvalds private->rdc_data.cu_type, 17501da177e4SLinus Torvalds private->rdc_data.cu_model.model, 1751b44b0ab3SStefan Weinhuber private->real_cyl, 17521da177e4SLinus Torvalds private->rdc_data.trk_per_cyl, 175333b62a30SStefan Weinhuber private->rdc_data.sec_per_trk, 175433b62a30SStefan Weinhuber readonly ? ", read-only device" : ""); 17558e09f215SStefan Weinhuber return 0; 17568e09f215SStefan Weinhuber 17578e09f215SStefan Weinhuber out_err3: 17588e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 17598e09f215SStefan Weinhuber out_err2: 17608e09f215SStefan Weinhuber dasd_free_block(device->block); 17618e09f215SStefan Weinhuber device->block = NULL; 17628e09f215SStefan Weinhuber out_err1: 17634abb08c2SStefan Weinhuber kfree(private->conf_data); 17648e09f215SStefan Weinhuber kfree(device->private); 17658e09f215SStefan Weinhuber device->private = NULL; 17663d052595SHorst Hummel return rc; 17671da177e4SLinus Torvalds } 17681da177e4SLinus Torvalds 17698e09f215SStefan Weinhuber static void dasd_eckd_uncheck_device(struct dasd_device *device) 17708e09f215SStefan Weinhuber { 17714abb08c2SStefan Weinhuber struct dasd_eckd_private *private; 17724abb08c2SStefan Weinhuber 17734abb08c2SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 17748e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 17754abb08c2SStefan Weinhuber private->ned = NULL; 17764abb08c2SStefan Weinhuber private->sneq = NULL; 17774abb08c2SStefan Weinhuber private->vdsneq = NULL; 17784abb08c2SStefan Weinhuber private->gneq = NULL; 17794abb08c2SStefan Weinhuber private->conf_len = 0; 17804abb08c2SStefan Weinhuber kfree(private->conf_data); 17814abb08c2SStefan Weinhuber private->conf_data = NULL; 17828e09f215SStefan Weinhuber } 17838e09f215SStefan Weinhuber 17841da177e4SLinus Torvalds static struct dasd_ccw_req * 17851da177e4SLinus Torvalds dasd_eckd_analysis_ccw(struct dasd_device *device) 17861da177e4SLinus Torvalds { 17871da177e4SLinus Torvalds struct dasd_eckd_private *private; 17881da177e4SLinus Torvalds struct eckd_count *count_data; 17891da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 17901da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 17911da177e4SLinus Torvalds struct ccw1 *ccw; 17921da177e4SLinus Torvalds int cplength, datasize; 17931da177e4SLinus Torvalds int i; 17941da177e4SLinus Torvalds 17951da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 17961da177e4SLinus Torvalds 17971da177e4SLinus Torvalds cplength = 8; 17981da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 179968b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 18001da177e4SLinus Torvalds if (IS_ERR(cqr)) 18011da177e4SLinus Torvalds return cqr; 18021da177e4SLinus Torvalds ccw = cqr->cpaddr; 18031da177e4SLinus Torvalds /* Define extent for the first 3 tracks. */ 18041da177e4SLinus Torvalds define_extent(ccw++, cqr->data, 0, 2, 18051da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device); 18061da177e4SLinus Torvalds LO_data = cqr->data + sizeof(struct DE_eckd_data); 18071da177e4SLinus Torvalds /* Locate record for the first 4 records on track 0. */ 18081da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18091da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 0, 0, 4, 18101da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 18111da177e4SLinus Torvalds 18121da177e4SLinus Torvalds count_data = private->count_area; 18131da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 18141da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18151da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 18161da177e4SLinus Torvalds ccw->flags = 0; 18171da177e4SLinus Torvalds ccw->count = 8; 18181da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 18191da177e4SLinus Torvalds ccw++; 18201da177e4SLinus Torvalds count_data++; 18211da177e4SLinus Torvalds } 18221da177e4SLinus Torvalds 18231da177e4SLinus Torvalds /* Locate record for the first record on track 2. */ 18241da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18251da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 2, 0, 1, 18261da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 18271da177e4SLinus Torvalds /* Read count ccw. */ 18281da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18291da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 18301da177e4SLinus Torvalds ccw->flags = 0; 18311da177e4SLinus Torvalds ccw->count = 8; 18321da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 18331da177e4SLinus Torvalds 18348e09f215SStefan Weinhuber cqr->block = NULL; 18358e09f215SStefan Weinhuber cqr->startdev = device; 18368e09f215SStefan Weinhuber cqr->memdev = device; 1837eb6e199bSStefan Weinhuber cqr->retries = 255; 18381da177e4SLinus Torvalds cqr->buildclk = get_clock(); 18391da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 18401da177e4SLinus Torvalds return cqr; 18411da177e4SLinus Torvalds } 18421da177e4SLinus Torvalds 1843eb6e199bSStefan Weinhuber /* differentiate between 'no record found' and any other error */ 1844eb6e199bSStefan Weinhuber static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) 1845eb6e199bSStefan Weinhuber { 1846eb6e199bSStefan Weinhuber char *sense; 1847eb6e199bSStefan Weinhuber if (init_cqr->status == DASD_CQR_DONE) 1848eb6e199bSStefan Weinhuber return INIT_CQR_OK; 1849eb6e199bSStefan Weinhuber else if (init_cqr->status == DASD_CQR_NEED_ERP || 1850eb6e199bSStefan Weinhuber init_cqr->status == DASD_CQR_FAILED) { 1851eb6e199bSStefan Weinhuber sense = dasd_get_sense(&init_cqr->irb); 1852eb6e199bSStefan Weinhuber if (sense && (sense[1] & SNS1_NO_REC_FOUND)) 1853eb6e199bSStefan Weinhuber return INIT_CQR_UNFORMATTED; 1854eb6e199bSStefan Weinhuber else 1855eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 1856eb6e199bSStefan Weinhuber } else 1857eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 1858eb6e199bSStefan Weinhuber } 1859eb6e199bSStefan Weinhuber 18601da177e4SLinus Torvalds /* 18611da177e4SLinus Torvalds * This is the callback function for the init_analysis cqr. It saves 18621da177e4SLinus Torvalds * the status of the initial analysis ccw before it frees it and kicks 18631da177e4SLinus Torvalds * the device to continue the startup sequence. This will call 18641da177e4SLinus Torvalds * dasd_eckd_do_analysis again (if the devices has not been marked 18651da177e4SLinus Torvalds * for deletion in the meantime). 18661da177e4SLinus Torvalds */ 1867eb6e199bSStefan Weinhuber static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, 1868eb6e199bSStefan Weinhuber void *data) 18691da177e4SLinus Torvalds { 18701da177e4SLinus Torvalds struct dasd_eckd_private *private; 18711da177e4SLinus Torvalds struct dasd_device *device; 18721da177e4SLinus Torvalds 18738e09f215SStefan Weinhuber device = init_cqr->startdev; 18741da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 1875eb6e199bSStefan Weinhuber private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); 18761da177e4SLinus Torvalds dasd_sfree_request(init_cqr, device); 18771da177e4SLinus Torvalds dasd_kick_device(device); 18781da177e4SLinus Torvalds } 18791da177e4SLinus Torvalds 1880eb6e199bSStefan Weinhuber static int dasd_eckd_start_analysis(struct dasd_block *block) 18811da177e4SLinus Torvalds { 18821da177e4SLinus Torvalds struct dasd_ccw_req *init_cqr; 18831da177e4SLinus Torvalds 18848e09f215SStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(block->base); 18851da177e4SLinus Torvalds if (IS_ERR(init_cqr)) 18861da177e4SLinus Torvalds return PTR_ERR(init_cqr); 18871da177e4SLinus Torvalds init_cqr->callback = dasd_eckd_analysis_callback; 18881da177e4SLinus Torvalds init_cqr->callback_data = NULL; 18891da177e4SLinus Torvalds init_cqr->expires = 5*HZ; 1890eb6e199bSStefan Weinhuber /* first try without ERP, so we can later handle unformatted 1891eb6e199bSStefan Weinhuber * devices as special case 1892eb6e199bSStefan Weinhuber */ 1893eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); 1894eb6e199bSStefan Weinhuber init_cqr->retries = 0; 18951da177e4SLinus Torvalds dasd_add_request_head(init_cqr); 18961da177e4SLinus Torvalds return -EAGAIN; 18971da177e4SLinus Torvalds } 18981da177e4SLinus Torvalds 1899eb6e199bSStefan Weinhuber static int dasd_eckd_end_analysis(struct dasd_block *block) 19001da177e4SLinus Torvalds { 19018e09f215SStefan Weinhuber struct dasd_device *device; 19021da177e4SLinus Torvalds struct dasd_eckd_private *private; 19031da177e4SLinus Torvalds struct eckd_count *count_area; 19041da177e4SLinus Torvalds unsigned int sb, blk_per_trk; 19051da177e4SLinus Torvalds int status, i; 1906eb6e199bSStefan Weinhuber struct dasd_ccw_req *init_cqr; 19071da177e4SLinus Torvalds 19088e09f215SStefan Weinhuber device = block->base; 19091da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 19101da177e4SLinus Torvalds status = private->init_cqr_status; 19111da177e4SLinus Torvalds private->init_cqr_status = -1; 1912eb6e199bSStefan Weinhuber if (status == INIT_CQR_ERROR) { 1913eb6e199bSStefan Weinhuber /* try again, this time with full ERP */ 1914eb6e199bSStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(device); 1915eb6e199bSStefan Weinhuber dasd_sleep_on(init_cqr); 1916eb6e199bSStefan Weinhuber status = dasd_eckd_analysis_evaluation(init_cqr); 1917eb6e199bSStefan Weinhuber dasd_sfree_request(init_cqr, device); 1918eb6e199bSStefan Weinhuber } 1919eb6e199bSStefan Weinhuber 1920e4dbb0f2SStefan Haberland if (device->features & DASD_FEATURE_USERAW) { 1921e4dbb0f2SStefan Haberland block->bp_block = DASD_RAW_BLOCKSIZE; 1922e4dbb0f2SStefan Haberland blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; 1923e4dbb0f2SStefan Haberland block->s2b_shift = 3; 1924e4dbb0f2SStefan Haberland goto raw; 1925e4dbb0f2SStefan Haberland } 1926e4dbb0f2SStefan Haberland 1927eb6e199bSStefan Weinhuber if (status == INIT_CQR_UNFORMATTED) { 1928eb6e199bSStefan Weinhuber dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); 19291da177e4SLinus Torvalds return -EMEDIUMTYPE; 1930eb6e199bSStefan Weinhuber } else if (status == INIT_CQR_ERROR) { 1931eb6e199bSStefan Weinhuber dev_err(&device->cdev->dev, 1932eb6e199bSStefan Weinhuber "Detecting the DASD disk layout failed because " 1933eb6e199bSStefan Weinhuber "of an I/O error\n"); 1934eb6e199bSStefan Weinhuber return -EIO; 19351da177e4SLinus Torvalds } 19361da177e4SLinus Torvalds 19371da177e4SLinus Torvalds private->uses_cdl = 1; 19381da177e4SLinus Torvalds /* Check Track 0 for Compatible Disk Layout */ 19391da177e4SLinus Torvalds count_area = NULL; 19401da177e4SLinus Torvalds for (i = 0; i < 3; i++) { 19411da177e4SLinus Torvalds if (private->count_area[i].kl != 4 || 19421da177e4SLinus Torvalds private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4) { 19431da177e4SLinus Torvalds private->uses_cdl = 0; 19441da177e4SLinus Torvalds break; 19451da177e4SLinus Torvalds } 19461da177e4SLinus Torvalds } 19471da177e4SLinus Torvalds if (i == 3) 19481da177e4SLinus Torvalds count_area = &private->count_area[4]; 19491da177e4SLinus Torvalds 19501da177e4SLinus Torvalds if (private->uses_cdl == 0) { 19511da177e4SLinus Torvalds for (i = 0; i < 5; i++) { 19521da177e4SLinus Torvalds if ((private->count_area[i].kl != 0) || 19531da177e4SLinus Torvalds (private->count_area[i].dl != 19541da177e4SLinus Torvalds private->count_area[0].dl)) 19551da177e4SLinus Torvalds break; 19561da177e4SLinus Torvalds } 19571da177e4SLinus Torvalds if (i == 5) 19581da177e4SLinus Torvalds count_area = &private->count_area[0]; 19591da177e4SLinus Torvalds } else { 19601da177e4SLinus Torvalds if (private->count_area[3].record == 1) 1961fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1962fc19f381SStefan Haberland "Track 0 has no records following the VTOC\n"); 19631da177e4SLinus Torvalds } 1964e4dbb0f2SStefan Haberland 19651da177e4SLinus Torvalds if (count_area != NULL && count_area->kl == 0) { 19661da177e4SLinus Torvalds /* we found notthing violating our disk layout */ 19671da177e4SLinus Torvalds if (dasd_check_blocksize(count_area->dl) == 0) 19688e09f215SStefan Weinhuber block->bp_block = count_area->dl; 19691da177e4SLinus Torvalds } 19708e09f215SStefan Weinhuber if (block->bp_block == 0) { 1971fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1972fc19f381SStefan Haberland "The disk layout of the DASD is not supported\n"); 19731da177e4SLinus Torvalds return -EMEDIUMTYPE; 19741da177e4SLinus Torvalds } 19758e09f215SStefan Weinhuber block->s2b_shift = 0; /* bits to shift 512 to get a block */ 19768e09f215SStefan Weinhuber for (sb = 512; sb < block->bp_block; sb = sb << 1) 19778e09f215SStefan Weinhuber block->s2b_shift++; 19781da177e4SLinus Torvalds 19798e09f215SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 1980e4dbb0f2SStefan Haberland 1981e4dbb0f2SStefan Haberland raw: 1982b44b0ab3SStefan Weinhuber block->blocks = (private->real_cyl * 19831da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 19841da177e4SLinus Torvalds blk_per_trk); 19851da177e4SLinus Torvalds 1986fc19f381SStefan Haberland dev_info(&device->cdev->dev, 1987fc19f381SStefan Haberland "DASD with %d KB/block, %d KB total size, %d KB/track, " 1988fc19f381SStefan Haberland "%s\n", (block->bp_block >> 10), 1989b44b0ab3SStefan Weinhuber ((private->real_cyl * 19901da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 19918e09f215SStefan Weinhuber blk_per_trk * (block->bp_block >> 9)) >> 1), 19928e09f215SStefan Weinhuber ((blk_per_trk * block->bp_block) >> 10), 19931da177e4SLinus Torvalds private->uses_cdl ? 19941da177e4SLinus Torvalds "compatible disk layout" : "linux disk layout"); 19951da177e4SLinus Torvalds 19961da177e4SLinus Torvalds return 0; 19971da177e4SLinus Torvalds } 19981da177e4SLinus Torvalds 19998e09f215SStefan Weinhuber static int dasd_eckd_do_analysis(struct dasd_block *block) 20001da177e4SLinus Torvalds { 20011da177e4SLinus Torvalds struct dasd_eckd_private *private; 20021da177e4SLinus Torvalds 20038e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 20041da177e4SLinus Torvalds if (private->init_cqr_status < 0) 20058e09f215SStefan Weinhuber return dasd_eckd_start_analysis(block); 20061da177e4SLinus Torvalds else 20078e09f215SStefan Weinhuber return dasd_eckd_end_analysis(block); 20081da177e4SLinus Torvalds } 20091da177e4SLinus Torvalds 20108e09f215SStefan Weinhuber static int dasd_eckd_ready_to_online(struct dasd_device *device) 20118e09f215SStefan Weinhuber { 20128e09f215SStefan Weinhuber return dasd_alias_add_device(device); 20138e09f215SStefan Weinhuber }; 20148e09f215SStefan Weinhuber 20158e09f215SStefan Weinhuber static int dasd_eckd_online_to_ready(struct dasd_device *device) 20168e09f215SStefan Weinhuber { 2017501183f2SStefan Haberland cancel_work_sync(&device->reload_device); 201825e2cf1cSStefan Haberland cancel_work_sync(&device->kick_validate); 20198e09f215SStefan Weinhuber return dasd_alias_remove_device(device); 20208e09f215SStefan Weinhuber }; 20218e09f215SStefan Weinhuber 20221da177e4SLinus Torvalds static int 20238e09f215SStefan Weinhuber dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 20241da177e4SLinus Torvalds { 20251da177e4SLinus Torvalds struct dasd_eckd_private *private; 20261da177e4SLinus Torvalds 20278e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 20288e09f215SStefan Weinhuber if (dasd_check_blocksize(block->bp_block) == 0) { 20291da177e4SLinus Torvalds geo->sectors = recs_per_track(&private->rdc_data, 20308e09f215SStefan Weinhuber 0, block->bp_block); 20311da177e4SLinus Torvalds } 20321da177e4SLinus Torvalds geo->cylinders = private->rdc_data.no_cyl; 20331da177e4SLinus Torvalds geo->heads = private->rdc_data.trk_per_cyl; 20341da177e4SLinus Torvalds return 0; 20351da177e4SLinus Torvalds } 20361da177e4SLinus Torvalds 20371da177e4SLinus Torvalds static struct dasd_ccw_req * 20381da177e4SLinus Torvalds dasd_eckd_format_device(struct dasd_device * device, 20391da177e4SLinus Torvalds struct format_data_t * fdata) 20401da177e4SLinus Torvalds { 20411da177e4SLinus Torvalds struct dasd_eckd_private *private; 20421da177e4SLinus Torvalds struct dasd_ccw_req *fcp; 20431da177e4SLinus Torvalds struct eckd_count *ect; 20441da177e4SLinus Torvalds struct ccw1 *ccw; 20451da177e4SLinus Torvalds void *data; 2046b44b0ab3SStefan Weinhuber int rpt; 2047b44b0ab3SStefan Weinhuber struct ch_t address; 20481da177e4SLinus Torvalds int cplength, datasize; 20491da177e4SLinus Torvalds int i; 2050f9a28f7bSJean-Baptiste Joret int intensity = 0; 2051f9a28f7bSJean-Baptiste Joret int r0_perm; 20521da177e4SLinus Torvalds 20531da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 20541da177e4SLinus Torvalds rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize); 2055b44b0ab3SStefan Weinhuber set_ch_t(&address, 2056b44b0ab3SStefan Weinhuber fdata->start_unit / private->rdc_data.trk_per_cyl, 2057b44b0ab3SStefan Weinhuber fdata->start_unit % private->rdc_data.trk_per_cyl); 20581da177e4SLinus Torvalds 20591da177e4SLinus Torvalds /* Sanity checks. */ 20601da177e4SLinus Torvalds if (fdata->start_unit >= 2061b44b0ab3SStefan Weinhuber (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2062fc19f381SStefan Haberland dev_warn(&device->cdev->dev, "Start track number %d used in " 2063fc19f381SStefan Haberland "formatting is too big\n", fdata->start_unit); 20641da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 20651da177e4SLinus Torvalds } 20661da177e4SLinus Torvalds if (fdata->start_unit > fdata->stop_unit) { 2067fc19f381SStefan Haberland dev_warn(&device->cdev->dev, "Start track %d used in " 2068fc19f381SStefan Haberland "formatting exceeds end track\n", fdata->start_unit); 20691da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 20701da177e4SLinus Torvalds } 20711da177e4SLinus Torvalds if (dasd_check_blocksize(fdata->blksize) != 0) { 2072fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 2073fc19f381SStefan Haberland "The DASD cannot be formatted with block size %d\n", 20741da177e4SLinus Torvalds fdata->blksize); 20751da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 20761da177e4SLinus Torvalds } 20771da177e4SLinus Torvalds 20781da177e4SLinus Torvalds /* 20791da177e4SLinus Torvalds * fdata->intensity is a bit string that tells us what to do: 20801da177e4SLinus Torvalds * Bit 0: write record zero 20811da177e4SLinus Torvalds * Bit 1: write home address, currently not supported 20821da177e4SLinus Torvalds * Bit 2: invalidate tracks 20831da177e4SLinus Torvalds * Bit 3: use OS/390 compatible disk layout (cdl) 2084f9a28f7bSJean-Baptiste Joret * Bit 4: do not allow storage subsystem to modify record zero 20851da177e4SLinus Torvalds * Only some bit combinations do make sense. 20861da177e4SLinus Torvalds */ 2087f9a28f7bSJean-Baptiste Joret if (fdata->intensity & 0x10) { 2088f9a28f7bSJean-Baptiste Joret r0_perm = 0; 2089f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity & ~0x10; 2090f9a28f7bSJean-Baptiste Joret } else { 2091f9a28f7bSJean-Baptiste Joret r0_perm = 1; 2092f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity; 2093f9a28f7bSJean-Baptiste Joret } 2094f9a28f7bSJean-Baptiste Joret switch (intensity) { 20951da177e4SLinus Torvalds case 0x00: /* Normal format */ 20961da177e4SLinus Torvalds case 0x08: /* Normal format, use cdl. */ 20971da177e4SLinus Torvalds cplength = 2 + rpt; 20981da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 20991da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 21001da177e4SLinus Torvalds rpt * sizeof(struct eckd_count); 21011da177e4SLinus Torvalds break; 21021da177e4SLinus Torvalds case 0x01: /* Write record zero and format track. */ 21031da177e4SLinus Torvalds case 0x09: /* Write record zero and format track, use cdl. */ 21041da177e4SLinus Torvalds cplength = 3 + rpt; 21051da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 21061da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 21071da177e4SLinus Torvalds sizeof(struct eckd_count) + 21081da177e4SLinus Torvalds rpt * sizeof(struct eckd_count); 21091da177e4SLinus Torvalds break; 21101da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 21111da177e4SLinus Torvalds case 0x0c: /* Invalidate track, use cdl. */ 21121da177e4SLinus Torvalds cplength = 3; 21131da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 21141da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 21151da177e4SLinus Torvalds sizeof(struct eckd_count); 21161da177e4SLinus Torvalds break; 21171da177e4SLinus Torvalds default: 2118fc19f381SStefan Haberland dev_warn(&device->cdev->dev, "An I/O control call used " 2119fc19f381SStefan Haberland "incorrect flags 0x%x\n", fdata->intensity); 21201da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 21211da177e4SLinus Torvalds } 21221da177e4SLinus Torvalds /* Allocate the format ccw request. */ 212368b781feSStefan Haberland fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 21241da177e4SLinus Torvalds if (IS_ERR(fcp)) 21251da177e4SLinus Torvalds return fcp; 21261da177e4SLinus Torvalds 21271da177e4SLinus Torvalds data = fcp->data; 21281da177e4SLinus Torvalds ccw = fcp->cpaddr; 21291da177e4SLinus Torvalds 2130f9a28f7bSJean-Baptiste Joret switch (intensity & ~0x08) { 21311da177e4SLinus Torvalds case 0x00: /* Normal format. */ 21321da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 21331da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 21341da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device); 2135f9a28f7bSJean-Baptiste Joret /* grant subsystem permission to format R0 */ 2136f9a28f7bSJean-Baptiste Joret if (r0_perm) 2137f9a28f7bSJean-Baptiste Joret ((struct DE_eckd_data *)data)->ga_extended |= 0x04; 21381da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 21391da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 21401da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 21411da177e4SLinus Torvalds fdata->start_unit, 0, rpt, 21421da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device, 21431da177e4SLinus Torvalds fdata->blksize); 21441da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 21451da177e4SLinus Torvalds break; 21461da177e4SLinus Torvalds case 0x01: /* Write record zero + format track. */ 21471da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 21481da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 21491da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, 21501da177e4SLinus Torvalds device); 21511da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 21521da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 21531da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 21541da177e4SLinus Torvalds fdata->start_unit, 0, rpt + 1, 21551da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, device, 21568e09f215SStefan Weinhuber device->block->bp_block); 21571da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 21581da177e4SLinus Torvalds break; 21591da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 21601da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 21611da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 21621da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device); 21631da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 21641da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 21651da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 21661da177e4SLinus Torvalds fdata->start_unit, 0, 1, 21671da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device, 8); 21681da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 21691da177e4SLinus Torvalds break; 21701da177e4SLinus Torvalds } 2171f9a28f7bSJean-Baptiste Joret if (intensity & 0x01) { /* write record zero */ 21721da177e4SLinus Torvalds ect = (struct eckd_count *) data; 21731da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2174b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2175b44b0ab3SStefan Weinhuber ect->head = address.head; 21761da177e4SLinus Torvalds ect->record = 0; 21771da177e4SLinus Torvalds ect->kl = 0; 21781da177e4SLinus Torvalds ect->dl = 8; 21791da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 21801da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 21811da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 21821da177e4SLinus Torvalds ccw->count = 8; 21831da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 21841da177e4SLinus Torvalds ccw++; 21851da177e4SLinus Torvalds } 2186f9a28f7bSJean-Baptiste Joret if ((intensity & ~0x08) & 0x04) { /* erase track */ 21871da177e4SLinus Torvalds ect = (struct eckd_count *) data; 21881da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2189b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2190b44b0ab3SStefan Weinhuber ect->head = address.head; 21911da177e4SLinus Torvalds ect->record = 1; 21921da177e4SLinus Torvalds ect->kl = 0; 21931da177e4SLinus Torvalds ect->dl = 0; 21941da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 21951da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 21961da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 21971da177e4SLinus Torvalds ccw->count = 8; 21981da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 21991da177e4SLinus Torvalds } else { /* write remaining records */ 22001da177e4SLinus Torvalds for (i = 0; i < rpt; i++) { 22011da177e4SLinus Torvalds ect = (struct eckd_count *) data; 22021da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2203b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2204b44b0ab3SStefan Weinhuber ect->head = address.head; 22051da177e4SLinus Torvalds ect->record = i + 1; 22061da177e4SLinus Torvalds ect->kl = 0; 22071da177e4SLinus Torvalds ect->dl = fdata->blksize; 22081da177e4SLinus Torvalds /* Check for special tracks 0-1 when formatting CDL */ 2209f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 22101da177e4SLinus Torvalds fdata->start_unit == 0) { 22111da177e4SLinus Torvalds if (i < 3) { 22121da177e4SLinus Torvalds ect->kl = 4; 22131da177e4SLinus Torvalds ect->dl = sizes_trk0[i] - 4; 22141da177e4SLinus Torvalds } 22151da177e4SLinus Torvalds } 2216f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 22171da177e4SLinus Torvalds fdata->start_unit == 1) { 22181da177e4SLinus Torvalds ect->kl = 44; 22191da177e4SLinus Torvalds ect->dl = LABEL_SIZE - 44; 22201da177e4SLinus Torvalds } 22211da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 22221da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 22231da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 22241da177e4SLinus Torvalds ccw->count = 8; 22251da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 22261da177e4SLinus Torvalds ccw++; 22271da177e4SLinus Torvalds } 22281da177e4SLinus Torvalds } 22298e09f215SStefan Weinhuber fcp->startdev = device; 22308e09f215SStefan Weinhuber fcp->memdev = device; 2231eb6e199bSStefan Weinhuber fcp->retries = 256; 22321da177e4SLinus Torvalds fcp->buildclk = get_clock(); 22331da177e4SLinus Torvalds fcp->status = DASD_CQR_FILLED; 22341da177e4SLinus Torvalds return fcp; 22351da177e4SLinus Torvalds } 22361da177e4SLinus Torvalds 22378e09f215SStefan Weinhuber static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 22381da177e4SLinus Torvalds { 22398e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 22408e09f215SStefan Weinhuber if (cqr->block && (cqr->startdev != cqr->block->base)) { 22418e09f215SStefan Weinhuber dasd_eckd_reset_ccw_to_base_io(cqr); 22428e09f215SStefan Weinhuber cqr->startdev = cqr->block->base; 2243a4d26c6aSStefan Weinhuber cqr->lpm = cqr->block->base->path_data.opm; 22441da177e4SLinus Torvalds } 22458e09f215SStefan Weinhuber }; 22461da177e4SLinus Torvalds 22471da177e4SLinus Torvalds static dasd_erp_fn_t 22481da177e4SLinus Torvalds dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 22491da177e4SLinus Torvalds { 22508e09f215SStefan Weinhuber struct dasd_device *device = (struct dasd_device *) cqr->startdev; 22511da177e4SLinus Torvalds struct ccw_device *cdev = device->cdev; 22521da177e4SLinus Torvalds 22531da177e4SLinus Torvalds switch (cdev->id.cu_type) { 22541da177e4SLinus Torvalds case 0x3990: 22551da177e4SLinus Torvalds case 0x2105: 22561da177e4SLinus Torvalds case 0x2107: 22571da177e4SLinus Torvalds case 0x1750: 22581da177e4SLinus Torvalds return dasd_3990_erp_action; 22591da177e4SLinus Torvalds case 0x9343: 22601da177e4SLinus Torvalds case 0x3880: 22611da177e4SLinus Torvalds default: 22621da177e4SLinus Torvalds return dasd_default_erp_action; 22631da177e4SLinus Torvalds } 22641da177e4SLinus Torvalds } 22651da177e4SLinus Torvalds 22661da177e4SLinus Torvalds static dasd_erp_fn_t 22671da177e4SLinus Torvalds dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 22681da177e4SLinus Torvalds { 22691da177e4SLinus Torvalds return dasd_default_erp_postaction; 22701da177e4SLinus Torvalds } 22711da177e4SLinus Torvalds 22725a27e60dSStefan Weinhuber static void dasd_eckd_check_for_device_change(struct dasd_device *device, 22735a27e60dSStefan Weinhuber struct dasd_ccw_req *cqr, 22748e09f215SStefan Weinhuber struct irb *irb) 22758e09f215SStefan Weinhuber { 22768e09f215SStefan Weinhuber char mask; 2277f3eb5384SStefan Weinhuber char *sense = NULL; 2278501183f2SStefan Haberland struct dasd_eckd_private *private; 22798e09f215SStefan Weinhuber 2280501183f2SStefan Haberland private = (struct dasd_eckd_private *) device->private; 22818e09f215SStefan Weinhuber /* first of all check for state change pending interrupt */ 22828e09f215SStefan Weinhuber mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 2283f3eb5384SStefan Weinhuber if ((scsw_dstat(&irb->scsw) & mask) == mask) { 2284c8d1c0ffSStefan Haberland /* 2285c8d1c0ffSStefan Haberland * for alias only, not in offline processing 2286c8d1c0ffSStefan Haberland * and only if not suspended 2287c8d1c0ffSStefan Haberland */ 2288501183f2SStefan Haberland if (!device->block && private->lcu && 228925e2cf1cSStefan Haberland device->state == DASD_STATE_ONLINE && 2290c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_OFFLINE, &device->flags) && 2291c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 2292501183f2SStefan Haberland /* 2293501183f2SStefan Haberland * the state change could be caused by an alias 2294501183f2SStefan Haberland * reassignment remove device from alias handling 2295501183f2SStefan Haberland * to prevent new requests from being scheduled on 2296501183f2SStefan Haberland * the wrong alias device 2297501183f2SStefan Haberland */ 2298501183f2SStefan Haberland dasd_alias_remove_device(device); 2299501183f2SStefan Haberland 2300501183f2SStefan Haberland /* schedule worker to reload device */ 2301501183f2SStefan Haberland dasd_reload_device(device); 2302501183f2SStefan Haberland } 23038e09f215SStefan Weinhuber dasd_generic_handle_state_change(device); 23048e09f215SStefan Weinhuber return; 23058e09f215SStefan Weinhuber } 23068e09f215SStefan Weinhuber 2307a5a0061fSStefan Weinhuber sense = dasd_get_sense(irb); 23085a27e60dSStefan Weinhuber if (!sense) 23095a27e60dSStefan Weinhuber return; 23105a27e60dSStefan Weinhuber 23115a27e60dSStefan Weinhuber /* summary unit check */ 2312c7a29e56SStefan Weinhuber if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) && 2313a5a0061fSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { 23148e09f215SStefan Weinhuber dasd_alias_handle_summary_unit_check(device, irb); 23158e09f215SStefan Weinhuber return; 23168e09f215SStefan Weinhuber } 23178e09f215SStefan Weinhuber 2318f60c768cSStefan Haberland /* service information message SIM */ 23195a27e60dSStefan Weinhuber if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && 2320f3eb5384SStefan Weinhuber ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 2321f3eb5384SStefan Weinhuber dasd_3990_erp_handle_sim(device, sense); 2322f60c768cSStefan Haberland return; 2323f60c768cSStefan Haberland } 2324f60c768cSStefan Haberland 23255a27e60dSStefan Weinhuber /* loss of device reservation is handled via base devices only 23265a27e60dSStefan Weinhuber * as alias devices may be used with several bases 23275a27e60dSStefan Weinhuber */ 2328c7a29e56SStefan Weinhuber if (device->block && (sense[27] & DASD_SENSE_BIT_0) && 2329c7a29e56SStefan Weinhuber (sense[7] == 0x3F) && 23305a27e60dSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && 23315a27e60dSStefan Weinhuber test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { 23325a27e60dSStefan Weinhuber if (device->features & DASD_FEATURE_FAILONSLCK) 23335a27e60dSStefan Weinhuber set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); 23345a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 23355a27e60dSStefan Weinhuber dev_err(&device->cdev->dev, 23365a27e60dSStefan Weinhuber "The device reservation was lost\n"); 2337ada3df91SStefan Haberland } 23385a27e60dSStefan Weinhuber } 2339f3eb5384SStefan Weinhuber 2340f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( 2341f3eb5384SStefan Weinhuber struct dasd_device *startdev, 23428e09f215SStefan Weinhuber struct dasd_block *block, 2343f3eb5384SStefan Weinhuber struct request *req, 2344f3eb5384SStefan Weinhuber sector_t first_rec, 2345f3eb5384SStefan Weinhuber sector_t last_rec, 2346f3eb5384SStefan Weinhuber sector_t first_trk, 2347f3eb5384SStefan Weinhuber sector_t last_trk, 2348f3eb5384SStefan Weinhuber unsigned int first_offs, 2349f3eb5384SStefan Weinhuber unsigned int last_offs, 2350f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 2351f3eb5384SStefan Weinhuber unsigned int blksize) 23521da177e4SLinus Torvalds { 23531da177e4SLinus Torvalds struct dasd_eckd_private *private; 23541da177e4SLinus Torvalds unsigned long *idaws; 23551da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 23561da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 23571da177e4SLinus Torvalds struct ccw1 *ccw; 23585705f702SNeilBrown struct req_iterator iter; 23591da177e4SLinus Torvalds struct bio_vec *bv; 23601da177e4SLinus Torvalds char *dst; 2361f3eb5384SStefan Weinhuber unsigned int off; 23621da177e4SLinus Torvalds int count, cidaw, cplength, datasize; 2363f3eb5384SStefan Weinhuber sector_t recid; 23641da177e4SLinus Torvalds unsigned char cmd, rcmd; 23658e09f215SStefan Weinhuber int use_prefix; 23668e09f215SStefan Weinhuber struct dasd_device *basedev; 23671da177e4SLinus Torvalds 23688e09f215SStefan Weinhuber basedev = block->base; 23698e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 23701da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 23711da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_READ_MT; 23721da177e4SLinus Torvalds else if (rq_data_dir(req) == WRITE) 23731da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_WRITE_MT; 23741da177e4SLinus Torvalds else 23751da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 2376f3eb5384SStefan Weinhuber 23771da177e4SLinus Torvalds /* Check struct bio and count the number of blocks for the request. */ 23781da177e4SLinus Torvalds count = 0; 23791da177e4SLinus Torvalds cidaw = 0; 23805705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 23811da177e4SLinus Torvalds if (bv->bv_len & (blksize - 1)) 23821da177e4SLinus Torvalds /* Eckd can only do full blocks. */ 23831da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 23848e09f215SStefan Weinhuber count += bv->bv_len >> (block->s2b_shift + 9); 2385347a8dc3SMartin Schwidefsky #if defined(CONFIG_64BIT) 23866c92e699SJens Axboe if (idal_is_needed (page_address(bv->bv_page), bv->bv_len)) 23878e09f215SStefan Weinhuber cidaw += bv->bv_len >> (block->s2b_shift + 9); 23881da177e4SLinus Torvalds #endif 23891da177e4SLinus Torvalds } 23901da177e4SLinus Torvalds /* Paranoia. */ 23911da177e4SLinus Torvalds if (count != last_rec - first_rec + 1) 23921da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 23938e09f215SStefan Weinhuber 23948e09f215SStefan Weinhuber /* use the prefix command if available */ 23958e09f215SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 23968e09f215SStefan Weinhuber if (use_prefix) { 23978e09f215SStefan Weinhuber /* 1x prefix + number of blocks */ 23988e09f215SStefan Weinhuber cplength = 2 + count; 23998e09f215SStefan Weinhuber /* 1x prefix + cidaws*sizeof(long) */ 24008e09f215SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 24018e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 24028e09f215SStefan Weinhuber cidaw * sizeof(unsigned long); 24038e09f215SStefan Weinhuber } else { 24041da177e4SLinus Torvalds /* 1x define extent + 1x locate record + number of blocks */ 24051da177e4SLinus Torvalds cplength = 2 + count; 24061da177e4SLinus Torvalds /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 24078e09f215SStefan Weinhuber datasize = sizeof(struct DE_eckd_data) + 24088e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 24091da177e4SLinus Torvalds cidaw * sizeof(unsigned long); 24108e09f215SStefan Weinhuber } 24111da177e4SLinus Torvalds /* Find out the number of additional locate record ccws for cdl. */ 24121da177e4SLinus Torvalds if (private->uses_cdl && first_rec < 2*blk_per_trk) { 24131da177e4SLinus Torvalds if (last_rec >= 2*blk_per_trk) 24141da177e4SLinus Torvalds count = 2*blk_per_trk - first_rec; 24151da177e4SLinus Torvalds cplength += count; 24161da177e4SLinus Torvalds datasize += count*sizeof(struct LO_eckd_data); 24171da177e4SLinus Torvalds } 24181da177e4SLinus Torvalds /* Allocate the ccw request. */ 241968b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 242068b781feSStefan Haberland startdev); 24211da177e4SLinus Torvalds if (IS_ERR(cqr)) 24221da177e4SLinus Torvalds return cqr; 24231da177e4SLinus Torvalds ccw = cqr->cpaddr; 24248e09f215SStefan Weinhuber /* First ccw is define extent or prefix. */ 24258e09f215SStefan Weinhuber if (use_prefix) { 24268e09f215SStefan Weinhuber if (prefix(ccw++, cqr->data, first_trk, 24278e09f215SStefan Weinhuber last_trk, cmd, basedev, startdev) == -EAGAIN) { 24288e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 24298e09f215SStefan Weinhuber * Try again later. 24308e09f215SStefan Weinhuber */ 24318e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2432d54853efSMartin Schwidefsky return ERR_PTR(-EAGAIN); 2433d54853efSMartin Schwidefsky } 24348e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 24358e09f215SStefan Weinhuber sizeof(struct PFX_eckd_data)); 24368e09f215SStefan Weinhuber } else { 24378e09f215SStefan Weinhuber if (define_extent(ccw++, cqr->data, first_trk, 2438b38f27e8SStefan Haberland last_trk, cmd, basedev) == -EAGAIN) { 24398e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 24408e09f215SStefan Weinhuber * Try again later. 24418e09f215SStefan Weinhuber */ 24428e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 24438e09f215SStefan Weinhuber return ERR_PTR(-EAGAIN); 24448e09f215SStefan Weinhuber } 24458e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 24468e09f215SStefan Weinhuber sizeof(struct DE_eckd_data)); 24478e09f215SStefan Weinhuber } 24481da177e4SLinus Torvalds /* Build locate_record+read/write/ccws. */ 24491da177e4SLinus Torvalds LO_data = (struct LO_eckd_data *) (idaws + cidaw); 24501da177e4SLinus Torvalds recid = first_rec; 24511da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 24521da177e4SLinus Torvalds /* Only standard blocks so there is just one locate record. */ 24531da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 24541da177e4SLinus Torvalds locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 24558e09f215SStefan Weinhuber last_rec - recid + 1, cmd, basedev, blksize); 24561da177e4SLinus Torvalds } 24575705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 24581da177e4SLinus Torvalds dst = page_address(bv->bv_page) + bv->bv_offset; 24591da177e4SLinus Torvalds if (dasd_page_cache) { 24601da177e4SLinus Torvalds char *copy = kmem_cache_alloc(dasd_page_cache, 2461441e143eSChristoph Lameter GFP_DMA | __GFP_NOWARN); 24621da177e4SLinus Torvalds if (copy && rq_data_dir(req) == WRITE) 24631da177e4SLinus Torvalds memcpy(copy + bv->bv_offset, dst, bv->bv_len); 24641da177e4SLinus Torvalds if (copy) 24651da177e4SLinus Torvalds dst = copy + bv->bv_offset; 24661da177e4SLinus Torvalds } 24671da177e4SLinus Torvalds for (off = 0; off < bv->bv_len; off += blksize) { 24681da177e4SLinus Torvalds sector_t trkid = recid; 24691da177e4SLinus Torvalds unsigned int recoffs = sector_div(trkid, blk_per_trk); 24701da177e4SLinus Torvalds rcmd = cmd; 24711da177e4SLinus Torvalds count = blksize; 24721da177e4SLinus Torvalds /* Locate record for cdl special block ? */ 24731da177e4SLinus Torvalds if (private->uses_cdl && recid < 2*blk_per_trk) { 24741da177e4SLinus Torvalds if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 24751da177e4SLinus Torvalds rcmd |= 0x8; 24761da177e4SLinus Torvalds count = dasd_eckd_cdl_reclen(recid); 2477ec5883abSHorst Hummel if (count < blksize && 2478ec5883abSHorst Hummel rq_data_dir(req) == READ) 24791da177e4SLinus Torvalds memset(dst + count, 0xe5, 24801da177e4SLinus Torvalds blksize - count); 24811da177e4SLinus Torvalds } 24821da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 24831da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 24841da177e4SLinus Torvalds trkid, recoffs + 1, 24858e09f215SStefan Weinhuber 1, rcmd, basedev, count); 24861da177e4SLinus Torvalds } 24871da177e4SLinus Torvalds /* Locate record for standard blocks ? */ 24881da177e4SLinus Torvalds if (private->uses_cdl && recid == 2*blk_per_trk) { 24891da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 24901da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 24911da177e4SLinus Torvalds trkid, recoffs + 1, 24921da177e4SLinus Torvalds last_rec - recid + 1, 24938e09f215SStefan Weinhuber cmd, basedev, count); 24941da177e4SLinus Torvalds } 24951da177e4SLinus Torvalds /* Read/write ccw. */ 24961da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 24971da177e4SLinus Torvalds ccw->cmd_code = rcmd; 24981da177e4SLinus Torvalds ccw->count = count; 24991da177e4SLinus Torvalds if (idal_is_needed(dst, blksize)) { 25001da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) idaws; 25011da177e4SLinus Torvalds ccw->flags = CCW_FLAG_IDA; 25021da177e4SLinus Torvalds idaws = idal_create_words(idaws, dst, blksize); 25031da177e4SLinus Torvalds } else { 25041da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) dst; 25051da177e4SLinus Torvalds ccw->flags = 0; 25061da177e4SLinus Torvalds } 25071da177e4SLinus Torvalds ccw++; 25081da177e4SLinus Torvalds dst += blksize; 25091da177e4SLinus Torvalds recid++; 25101da177e4SLinus Torvalds } 25111da177e4SLinus Torvalds } 251213de227bSHolger Smolinski if (blk_noretry_request(req) || 251313de227bSHolger Smolinski block->base->features & DASD_FEATURE_FAILFAST) 25141c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 25158e09f215SStefan Weinhuber cqr->startdev = startdev; 25168e09f215SStefan Weinhuber cqr->memdev = startdev; 25178e09f215SStefan Weinhuber cqr->block = block; 25187c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2519a4d26c6aSStefan Weinhuber cqr->lpm = startdev->path_data.ppm; 25201da177e4SLinus Torvalds cqr->retries = 256; 25211da177e4SLinus Torvalds cqr->buildclk = get_clock(); 25221da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 25231da177e4SLinus Torvalds return cqr; 25241da177e4SLinus Torvalds } 25251da177e4SLinus Torvalds 2526f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 2527f3eb5384SStefan Weinhuber struct dasd_device *startdev, 2528f3eb5384SStefan Weinhuber struct dasd_block *block, 2529f3eb5384SStefan Weinhuber struct request *req, 2530f3eb5384SStefan Weinhuber sector_t first_rec, 2531f3eb5384SStefan Weinhuber sector_t last_rec, 2532f3eb5384SStefan Weinhuber sector_t first_trk, 2533f3eb5384SStefan Weinhuber sector_t last_trk, 2534f3eb5384SStefan Weinhuber unsigned int first_offs, 2535f3eb5384SStefan Weinhuber unsigned int last_offs, 2536f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 2537f3eb5384SStefan Weinhuber unsigned int blksize) 2538f3eb5384SStefan Weinhuber { 2539f3eb5384SStefan Weinhuber unsigned long *idaws; 2540f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 2541f3eb5384SStefan Weinhuber struct ccw1 *ccw; 2542f3eb5384SStefan Weinhuber struct req_iterator iter; 2543f3eb5384SStefan Weinhuber struct bio_vec *bv; 2544f3eb5384SStefan Weinhuber char *dst, *idaw_dst; 2545f3eb5384SStefan Weinhuber unsigned int cidaw, cplength, datasize; 2546f3eb5384SStefan Weinhuber unsigned int tlf; 2547f3eb5384SStefan Weinhuber sector_t recid; 2548f3eb5384SStefan Weinhuber unsigned char cmd; 2549f3eb5384SStefan Weinhuber struct dasd_device *basedev; 2550f3eb5384SStefan Weinhuber unsigned int trkcount, count, count_to_trk_end; 2551f3eb5384SStefan Weinhuber unsigned int idaw_len, seg_len, part_len, len_to_track_end; 2552f3eb5384SStefan Weinhuber unsigned char new_track, end_idaw; 2553f3eb5384SStefan Weinhuber sector_t trkid; 2554f3eb5384SStefan Weinhuber unsigned int recoffs; 2555f3eb5384SStefan Weinhuber 2556f3eb5384SStefan Weinhuber basedev = block->base; 2557f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) 2558f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 2559f3eb5384SStefan Weinhuber else if (rq_data_dir(req) == WRITE) 2560f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 2561f3eb5384SStefan Weinhuber else 2562f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 2563f3eb5384SStefan Weinhuber 2564f3eb5384SStefan Weinhuber /* Track based I/O needs IDAWs for each page, and not just for 2565f3eb5384SStefan Weinhuber * 64 bit addresses. We need additional idals for pages 2566f3eb5384SStefan Weinhuber * that get filled from two tracks, so we use the number 2567f3eb5384SStefan Weinhuber * of records as upper limit. 2568f3eb5384SStefan Weinhuber */ 2569f3eb5384SStefan Weinhuber cidaw = last_rec - first_rec + 1; 2570f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 2571f3eb5384SStefan Weinhuber 2572f3eb5384SStefan Weinhuber /* 1x prefix + one read/write ccw per track */ 2573f3eb5384SStefan Weinhuber cplength = 1 + trkcount; 2574f3eb5384SStefan Weinhuber 2575f3eb5384SStefan Weinhuber /* on 31-bit we need space for two 32 bit addresses per page 2576f3eb5384SStefan Weinhuber * on 64-bit one 64 bit address 2577f3eb5384SStefan Weinhuber */ 2578f3eb5384SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 2579f3eb5384SStefan Weinhuber cidaw * sizeof(unsigned long long); 2580f3eb5384SStefan Weinhuber 2581f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 258268b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 258368b781feSStefan Haberland startdev); 2584f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 2585f3eb5384SStefan Weinhuber return cqr; 2586f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 2587f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 2588f3eb5384SStefan Weinhuber if (first_trk == last_trk) 2589f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 2590f3eb5384SStefan Weinhuber else 2591f3eb5384SStefan Weinhuber tlf = last_offs + 1; 2592f3eb5384SStefan Weinhuber tlf *= blksize; 2593f3eb5384SStefan Weinhuber 2594f3eb5384SStefan Weinhuber if (prefix_LRE(ccw++, cqr->data, first_trk, 2595f3eb5384SStefan Weinhuber last_trk, cmd, basedev, startdev, 2596f3eb5384SStefan Weinhuber 1 /* format */, first_offs + 1, 2597f3eb5384SStefan Weinhuber trkcount, blksize, 2598f3eb5384SStefan Weinhuber tlf) == -EAGAIN) { 2599f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 2600f3eb5384SStefan Weinhuber * Try again later. 2601f3eb5384SStefan Weinhuber */ 2602f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2603f3eb5384SStefan Weinhuber return ERR_PTR(-EAGAIN); 2604f3eb5384SStefan Weinhuber } 2605f3eb5384SStefan Weinhuber 2606f3eb5384SStefan Weinhuber /* 2607f3eb5384SStefan Weinhuber * The translation of request into ccw programs must meet the 2608f3eb5384SStefan Weinhuber * following conditions: 2609f3eb5384SStefan Weinhuber * - all idaws but the first and the last must address full pages 2610f3eb5384SStefan Weinhuber * (or 2K blocks on 31-bit) 2611f3eb5384SStefan Weinhuber * - the scope of a ccw and it's idal ends with the track boundaries 2612f3eb5384SStefan Weinhuber */ 2613f3eb5384SStefan Weinhuber idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); 2614f3eb5384SStefan Weinhuber recid = first_rec; 2615f3eb5384SStefan Weinhuber new_track = 1; 2616f3eb5384SStefan Weinhuber end_idaw = 0; 2617f3eb5384SStefan Weinhuber len_to_track_end = 0; 2618246ccea1SMartin Schwidefsky idaw_dst = NULL; 2619f3eb5384SStefan Weinhuber idaw_len = 0; 2620f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 2621f3eb5384SStefan Weinhuber dst = page_address(bv->bv_page) + bv->bv_offset; 2622f3eb5384SStefan Weinhuber seg_len = bv->bv_len; 2623f3eb5384SStefan Weinhuber while (seg_len) { 2624f3eb5384SStefan Weinhuber if (new_track) { 2625f3eb5384SStefan Weinhuber trkid = recid; 2626f3eb5384SStefan Weinhuber recoffs = sector_div(trkid, blk_per_trk); 2627f3eb5384SStefan Weinhuber count_to_trk_end = blk_per_trk - recoffs; 2628f3eb5384SStefan Weinhuber count = min((last_rec - recid + 1), 2629f3eb5384SStefan Weinhuber (sector_t)count_to_trk_end); 2630f3eb5384SStefan Weinhuber len_to_track_end = count * blksize; 2631f3eb5384SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 2632f3eb5384SStefan Weinhuber ccw->cmd_code = cmd; 2633f3eb5384SStefan Weinhuber ccw->count = len_to_track_end; 2634f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 2635f3eb5384SStefan Weinhuber ccw->flags = CCW_FLAG_IDA; 2636f3eb5384SStefan Weinhuber ccw++; 2637f3eb5384SStefan Weinhuber recid += count; 2638f3eb5384SStefan Weinhuber new_track = 0; 263952db45c3SStefan Weinhuber /* first idaw for a ccw may start anywhere */ 264052db45c3SStefan Weinhuber if (!idaw_dst) 264152db45c3SStefan Weinhuber idaw_dst = dst; 2642f3eb5384SStefan Weinhuber } 264352db45c3SStefan Weinhuber /* If we start a new idaw, we must make sure that it 264452db45c3SStefan Weinhuber * starts on an IDA_BLOCK_SIZE boundary. 2645f3eb5384SStefan Weinhuber * If we continue an idaw, we must make sure that the 2646f3eb5384SStefan Weinhuber * current segment begins where the so far accumulated 2647f3eb5384SStefan Weinhuber * idaw ends 2648f3eb5384SStefan Weinhuber */ 264952db45c3SStefan Weinhuber if (!idaw_dst) { 265052db45c3SStefan Weinhuber if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { 265152db45c3SStefan Weinhuber dasd_sfree_request(cqr, startdev); 265252db45c3SStefan Weinhuber return ERR_PTR(-ERANGE); 265352db45c3SStefan Weinhuber } else 2654f3eb5384SStefan Weinhuber idaw_dst = dst; 265552db45c3SStefan Weinhuber } 2656f3eb5384SStefan Weinhuber if ((idaw_dst + idaw_len) != dst) { 2657f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2658f3eb5384SStefan Weinhuber return ERR_PTR(-ERANGE); 2659f3eb5384SStefan Weinhuber } 2660f3eb5384SStefan Weinhuber part_len = min(seg_len, len_to_track_end); 2661f3eb5384SStefan Weinhuber seg_len -= part_len; 2662f3eb5384SStefan Weinhuber dst += part_len; 2663f3eb5384SStefan Weinhuber idaw_len += part_len; 2664f3eb5384SStefan Weinhuber len_to_track_end -= part_len; 2665f3eb5384SStefan Weinhuber /* collected memory area ends on an IDA_BLOCK border, 2666f3eb5384SStefan Weinhuber * -> create an idaw 2667f3eb5384SStefan Weinhuber * idal_create_words will handle cases where idaw_len 2668f3eb5384SStefan Weinhuber * is larger then IDA_BLOCK_SIZE 2669f3eb5384SStefan Weinhuber */ 2670f3eb5384SStefan Weinhuber if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) 2671f3eb5384SStefan Weinhuber end_idaw = 1; 2672f3eb5384SStefan Weinhuber /* We also need to end the idaw at track end */ 2673f3eb5384SStefan Weinhuber if (!len_to_track_end) { 2674f3eb5384SStefan Weinhuber new_track = 1; 2675f3eb5384SStefan Weinhuber end_idaw = 1; 2676f3eb5384SStefan Weinhuber } 2677f3eb5384SStefan Weinhuber if (end_idaw) { 2678f3eb5384SStefan Weinhuber idaws = idal_create_words(idaws, idaw_dst, 2679f3eb5384SStefan Weinhuber idaw_len); 2680246ccea1SMartin Schwidefsky idaw_dst = NULL; 2681f3eb5384SStefan Weinhuber idaw_len = 0; 2682f3eb5384SStefan Weinhuber end_idaw = 0; 2683f3eb5384SStefan Weinhuber } 2684f3eb5384SStefan Weinhuber } 2685f3eb5384SStefan Weinhuber } 2686f3eb5384SStefan Weinhuber 2687f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 2688f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 2689f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2690f3eb5384SStefan Weinhuber cqr->startdev = startdev; 2691f3eb5384SStefan Weinhuber cqr->memdev = startdev; 2692f3eb5384SStefan Weinhuber cqr->block = block; 26937c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2694a4d26c6aSStefan Weinhuber cqr->lpm = startdev->path_data.ppm; 2695f3eb5384SStefan Weinhuber cqr->retries = 256; 2696f3eb5384SStefan Weinhuber cqr->buildclk = get_clock(); 2697f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 2698f3eb5384SStefan Weinhuber return cqr; 2699f3eb5384SStefan Weinhuber } 2700f3eb5384SStefan Weinhuber 2701f3eb5384SStefan Weinhuber static int prepare_itcw(struct itcw *itcw, 2702f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 2703f3eb5384SStefan Weinhuber struct dasd_device *basedev, 2704f3eb5384SStefan Weinhuber struct dasd_device *startdev, 2705f3eb5384SStefan Weinhuber unsigned int rec_on_trk, int count, 2706f3eb5384SStefan Weinhuber unsigned int blksize, 2707f3eb5384SStefan Weinhuber unsigned int total_data_size, 2708f3eb5384SStefan Weinhuber unsigned int tlf, 2709f3eb5384SStefan Weinhuber unsigned int blk_per_trk) 2710f3eb5384SStefan Weinhuber { 2711f3eb5384SStefan Weinhuber struct PFX_eckd_data pfxdata; 2712f3eb5384SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 2713f3eb5384SStefan Weinhuber struct DE_eckd_data *dedata; 2714f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 2715f3eb5384SStefan Weinhuber struct dcw *dcw; 2716f3eb5384SStefan Weinhuber 2717f3eb5384SStefan Weinhuber u32 begcyl, endcyl; 2718f3eb5384SStefan Weinhuber u16 heads, beghead, endhead; 2719f3eb5384SStefan Weinhuber u8 pfx_cmd; 2720f3eb5384SStefan Weinhuber 2721f3eb5384SStefan Weinhuber int rc = 0; 2722f3eb5384SStefan Weinhuber int sector = 0; 2723f3eb5384SStefan Weinhuber int dn, d; 2724f3eb5384SStefan Weinhuber 2725f3eb5384SStefan Weinhuber 2726f3eb5384SStefan Weinhuber /* setup prefix data */ 2727f3eb5384SStefan Weinhuber basepriv = (struct dasd_eckd_private *) basedev->private; 2728f3eb5384SStefan Weinhuber startpriv = (struct dasd_eckd_private *) startdev->private; 2729f3eb5384SStefan Weinhuber dedata = &pfxdata.define_extent; 2730f3eb5384SStefan Weinhuber lredata = &pfxdata.locate_record; 2731f3eb5384SStefan Weinhuber 2732f3eb5384SStefan Weinhuber memset(&pfxdata, 0, sizeof(pfxdata)); 2733f3eb5384SStefan Weinhuber pfxdata.format = 1; /* PFX with LRE */ 2734f3eb5384SStefan Weinhuber pfxdata.base_address = basepriv->ned->unit_addr; 2735f3eb5384SStefan Weinhuber pfxdata.base_lss = basepriv->ned->ID; 2736f3eb5384SStefan Weinhuber pfxdata.validity.define_extent = 1; 2737f3eb5384SStefan Weinhuber 2738f3eb5384SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 2739f3eb5384SStefan Weinhuber if (startpriv->uid.type != UA_BASE_DEVICE) { 2740f3eb5384SStefan Weinhuber pfxdata.validity.verify_base = 1; 2741f3eb5384SStefan Weinhuber if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 2742f3eb5384SStefan Weinhuber pfxdata.validity.hyper_pav = 1; 2743f3eb5384SStefan Weinhuber } 2744f3eb5384SStefan Weinhuber 2745f3eb5384SStefan Weinhuber switch (cmd) { 2746f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 2747f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 2748f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 2749f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 2750f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 2751f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 2752f3eb5384SStefan Weinhuber lredata->operation.operation = 0x0C; 2753f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x01; 2754f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX_READ; 2755f3eb5384SStefan Weinhuber break; 2756f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 2757f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 2758f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 2759f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 2760f3eb5384SStefan Weinhuber rc = check_XRC_on_prefix(&pfxdata, basedev); 2761f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 2762f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 2763f3eb5384SStefan Weinhuber lredata->operation.operation = 0x3F; 2764f3eb5384SStefan Weinhuber lredata->extended_operation = 0x23; 2765f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x2; 2766f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX; 2767f3eb5384SStefan Weinhuber break; 2768f3eb5384SStefan Weinhuber default: 2769f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 2770f3eb5384SStefan Weinhuber "prepare itcw, unknown opcode 0x%x", cmd); 2771f3eb5384SStefan Weinhuber BUG(); 2772f3eb5384SStefan Weinhuber break; 2773f3eb5384SStefan Weinhuber } 2774f3eb5384SStefan Weinhuber if (rc) 2775f3eb5384SStefan Weinhuber return rc; 2776f3eb5384SStefan Weinhuber 2777f3eb5384SStefan Weinhuber dedata->attributes.mode = 0x3; /* ECKD */ 2778f3eb5384SStefan Weinhuber 2779f3eb5384SStefan Weinhuber heads = basepriv->rdc_data.trk_per_cyl; 2780f3eb5384SStefan Weinhuber begcyl = trk / heads; 2781f3eb5384SStefan Weinhuber beghead = trk % heads; 2782f3eb5384SStefan Weinhuber endcyl = totrk / heads; 2783f3eb5384SStefan Weinhuber endhead = totrk % heads; 2784f3eb5384SStefan Weinhuber 2785f3eb5384SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 2786f3eb5384SStefan Weinhuber if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 2787f3eb5384SStefan Weinhuber dedata->attributes.operation == DASD_SEQ_ACCESS) { 2788f3eb5384SStefan Weinhuber 2789f3eb5384SStefan Weinhuber if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 2790f3eb5384SStefan Weinhuber endcyl += basepriv->attrib.nr_cyl; 2791f3eb5384SStefan Weinhuber else 2792f3eb5384SStefan Weinhuber endcyl = (basepriv->real_cyl - 1); 2793f3eb5384SStefan Weinhuber } 2794f3eb5384SStefan Weinhuber 2795f3eb5384SStefan Weinhuber set_ch_t(&dedata->beg_ext, begcyl, beghead); 2796f3eb5384SStefan Weinhuber set_ch_t(&dedata->end_ext, endcyl, endhead); 2797f3eb5384SStefan Weinhuber 2798f3eb5384SStefan Weinhuber dedata->ep_format = 0x20; /* records per track is valid */ 2799f3eb5384SStefan Weinhuber dedata->ep_rec_per_track = blk_per_trk; 2800f3eb5384SStefan Weinhuber 2801f3eb5384SStefan Weinhuber if (rec_on_trk) { 2802f3eb5384SStefan Weinhuber switch (basepriv->rdc_data.dev_type) { 2803f3eb5384SStefan Weinhuber case 0x3390: 2804f3eb5384SStefan Weinhuber dn = ceil_quot(blksize + 6, 232); 2805f3eb5384SStefan Weinhuber d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); 2806f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 2807f3eb5384SStefan Weinhuber break; 2808f3eb5384SStefan Weinhuber case 0x3380: 2809f3eb5384SStefan Weinhuber d = 7 + ceil_quot(blksize + 12, 32); 2810f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 2811f3eb5384SStefan Weinhuber break; 2812f3eb5384SStefan Weinhuber } 2813f3eb5384SStefan Weinhuber } 2814f3eb5384SStefan Weinhuber 2815f3eb5384SStefan Weinhuber lredata->auxiliary.length_valid = 1; 2816f3eb5384SStefan Weinhuber lredata->auxiliary.length_scope = 1; 2817f3eb5384SStefan Weinhuber lredata->auxiliary.imbedded_ccw_valid = 1; 2818f3eb5384SStefan Weinhuber lredata->length = tlf; 2819f3eb5384SStefan Weinhuber lredata->imbedded_ccw = cmd; 2820f3eb5384SStefan Weinhuber lredata->count = count; 2821f3eb5384SStefan Weinhuber lredata->sector = sector; 2822f3eb5384SStefan Weinhuber set_ch_t(&lredata->seek_addr, begcyl, beghead); 2823f3eb5384SStefan Weinhuber lredata->search_arg.cyl = lredata->seek_addr.cyl; 2824f3eb5384SStefan Weinhuber lredata->search_arg.head = lredata->seek_addr.head; 2825f3eb5384SStefan Weinhuber lredata->search_arg.record = rec_on_trk; 2826f3eb5384SStefan Weinhuber 2827f3eb5384SStefan Weinhuber dcw = itcw_add_dcw(itcw, pfx_cmd, 0, 2828f3eb5384SStefan Weinhuber &pfxdata, sizeof(pfxdata), total_data_size); 2829364c18d8SHeiko Carstens return IS_ERR(dcw) ? PTR_ERR(dcw) : 0; 2830f3eb5384SStefan Weinhuber } 2831f3eb5384SStefan Weinhuber 2832f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 2833f3eb5384SStefan Weinhuber struct dasd_device *startdev, 2834f3eb5384SStefan Weinhuber struct dasd_block *block, 2835f3eb5384SStefan Weinhuber struct request *req, 2836f3eb5384SStefan Weinhuber sector_t first_rec, 2837f3eb5384SStefan Weinhuber sector_t last_rec, 2838f3eb5384SStefan Weinhuber sector_t first_trk, 2839f3eb5384SStefan Weinhuber sector_t last_trk, 2840f3eb5384SStefan Weinhuber unsigned int first_offs, 2841f3eb5384SStefan Weinhuber unsigned int last_offs, 2842f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 2843f3eb5384SStefan Weinhuber unsigned int blksize) 2844f3eb5384SStefan Weinhuber { 2845f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 2846f3eb5384SStefan Weinhuber struct req_iterator iter; 2847f3eb5384SStefan Weinhuber struct bio_vec *bv; 2848f3eb5384SStefan Weinhuber char *dst; 2849f3eb5384SStefan Weinhuber unsigned int trkcount, ctidaw; 2850f3eb5384SStefan Weinhuber unsigned char cmd; 2851f3eb5384SStefan Weinhuber struct dasd_device *basedev; 2852f3eb5384SStefan Weinhuber unsigned int tlf; 2853f3eb5384SStefan Weinhuber struct itcw *itcw; 2854f3eb5384SStefan Weinhuber struct tidaw *last_tidaw = NULL; 2855f3eb5384SStefan Weinhuber int itcw_op; 2856f3eb5384SStefan Weinhuber size_t itcw_size; 2857ef19298bSStefan Weinhuber u8 tidaw_flags; 2858ef19298bSStefan Weinhuber unsigned int seg_len, part_len, len_to_track_end; 2859ef19298bSStefan Weinhuber unsigned char new_track; 2860ef19298bSStefan Weinhuber sector_t recid, trkid; 2861ef19298bSStefan Weinhuber unsigned int offs; 2862ef19298bSStefan Weinhuber unsigned int count, count_to_trk_end; 2863cd10502bSJulia Lawall int ret; 2864f3eb5384SStefan Weinhuber 2865f3eb5384SStefan Weinhuber basedev = block->base; 2866f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) { 2867f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 2868f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_READ; 2869f3eb5384SStefan Weinhuber } else if (rq_data_dir(req) == WRITE) { 2870f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 2871f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_WRITE; 2872f3eb5384SStefan Weinhuber } else 2873f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 2874f3eb5384SStefan Weinhuber 2875f3eb5384SStefan Weinhuber /* trackbased I/O needs address all memory via TIDAWs, 2876f3eb5384SStefan Weinhuber * not just for 64 bit addresses. This allows us to map 2877f3eb5384SStefan Weinhuber * each segment directly to one tidaw. 2878ef19298bSStefan Weinhuber * In the case of write requests, additional tidaws may 2879ef19298bSStefan Weinhuber * be needed when a segment crosses a track boundary. 2880f3eb5384SStefan Weinhuber */ 2881f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 2882f3eb5384SStefan Weinhuber ctidaw = 0; 2883f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 2884f3eb5384SStefan Weinhuber ++ctidaw; 2885f3eb5384SStefan Weinhuber } 2886ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 2887ef19298bSStefan Weinhuber ctidaw += (last_trk - first_trk); 2888f3eb5384SStefan Weinhuber 2889f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 2890f3eb5384SStefan Weinhuber itcw_size = itcw_calc_size(0, ctidaw, 0); 289168b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 2892f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 2893f3eb5384SStefan Weinhuber return cqr; 2894f3eb5384SStefan Weinhuber 2895f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 2896f3eb5384SStefan Weinhuber if (first_trk == last_trk) 2897f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 2898f3eb5384SStefan Weinhuber else 2899f3eb5384SStefan Weinhuber tlf = last_offs + 1; 2900f3eb5384SStefan Weinhuber tlf *= blksize; 2901f3eb5384SStefan Weinhuber 2902f3eb5384SStefan Weinhuber itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); 2903ef19298bSStefan Weinhuber if (IS_ERR(itcw)) { 2904cd10502bSJulia Lawall ret = -EINVAL; 2905cd10502bSJulia Lawall goto out_error; 2906ef19298bSStefan Weinhuber } 2907f3eb5384SStefan Weinhuber cqr->cpaddr = itcw_get_tcw(itcw); 2908f3eb5384SStefan Weinhuber if (prepare_itcw(itcw, first_trk, last_trk, 2909f3eb5384SStefan Weinhuber cmd, basedev, startdev, 2910f3eb5384SStefan Weinhuber first_offs + 1, 2911f3eb5384SStefan Weinhuber trkcount, blksize, 2912f3eb5384SStefan Weinhuber (last_rec - first_rec + 1) * blksize, 2913f3eb5384SStefan Weinhuber tlf, blk_per_trk) == -EAGAIN) { 2914f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 2915f3eb5384SStefan Weinhuber * Try again later. 2916f3eb5384SStefan Weinhuber */ 2917cd10502bSJulia Lawall ret = -EAGAIN; 2918cd10502bSJulia Lawall goto out_error; 2919f3eb5384SStefan Weinhuber } 2920d54cddb6SHeiko Carstens len_to_track_end = 0; 2921f3eb5384SStefan Weinhuber /* 2922f3eb5384SStefan Weinhuber * A tidaw can address 4k of memory, but must not cross page boundaries 2923f3eb5384SStefan Weinhuber * We can let the block layer handle this by setting 2924f3eb5384SStefan Weinhuber * blk_queue_segment_boundary to page boundaries and 2925f3eb5384SStefan Weinhuber * blk_max_segment_size to page size when setting up the request queue. 2926ef19298bSStefan Weinhuber * For write requests, a TIDAW must not cross track boundaries, because 2927ef19298bSStefan Weinhuber * we have to set the CBC flag on the last tidaw for each track. 2928f3eb5384SStefan Weinhuber */ 2929ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) { 2930ef19298bSStefan Weinhuber new_track = 1; 2931ef19298bSStefan Weinhuber recid = first_rec; 2932f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 2933f3eb5384SStefan Weinhuber dst = page_address(bv->bv_page) + bv->bv_offset; 2934ef19298bSStefan Weinhuber seg_len = bv->bv_len; 2935ef19298bSStefan Weinhuber while (seg_len) { 2936ef19298bSStefan Weinhuber if (new_track) { 2937ef19298bSStefan Weinhuber trkid = recid; 2938ef19298bSStefan Weinhuber offs = sector_div(trkid, blk_per_trk); 2939ef19298bSStefan Weinhuber count_to_trk_end = blk_per_trk - offs; 2940ef19298bSStefan Weinhuber count = min((last_rec - recid + 1), 2941ef19298bSStefan Weinhuber (sector_t)count_to_trk_end); 2942ef19298bSStefan Weinhuber len_to_track_end = count * blksize; 2943ef19298bSStefan Weinhuber recid += count; 2944ef19298bSStefan Weinhuber new_track = 0; 2945f3eb5384SStefan Weinhuber } 2946ef19298bSStefan Weinhuber part_len = min(seg_len, len_to_track_end); 2947ef19298bSStefan Weinhuber seg_len -= part_len; 2948ef19298bSStefan Weinhuber len_to_track_end -= part_len; 2949ef19298bSStefan Weinhuber /* We need to end the tidaw at track end */ 2950ef19298bSStefan Weinhuber if (!len_to_track_end) { 2951ef19298bSStefan Weinhuber new_track = 1; 2952ef19298bSStefan Weinhuber tidaw_flags = TIDAW_FLAGS_INSERT_CBC; 2953ef19298bSStefan Weinhuber } else 2954ef19298bSStefan Weinhuber tidaw_flags = 0; 2955ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, 2956ef19298bSStefan Weinhuber dst, part_len); 2957cd10502bSJulia Lawall if (IS_ERR(last_tidaw)) { 2958cd10502bSJulia Lawall ret = -EINVAL; 2959cd10502bSJulia Lawall goto out_error; 2960cd10502bSJulia Lawall } 2961ef19298bSStefan Weinhuber dst += part_len; 2962ef19298bSStefan Weinhuber } 2963ef19298bSStefan Weinhuber } 2964ef19298bSStefan Weinhuber } else { 2965ef19298bSStefan Weinhuber rq_for_each_segment(bv, req, iter) { 2966ef19298bSStefan Weinhuber dst = page_address(bv->bv_page) + bv->bv_offset; 2967ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, 0x00, 2968ef19298bSStefan Weinhuber dst, bv->bv_len); 2969cd10502bSJulia Lawall if (IS_ERR(last_tidaw)) { 2970cd10502bSJulia Lawall ret = -EINVAL; 2971cd10502bSJulia Lawall goto out_error; 2972cd10502bSJulia Lawall } 2973ef19298bSStefan Weinhuber } 2974ef19298bSStefan Weinhuber } 2975ef19298bSStefan Weinhuber last_tidaw->flags |= TIDAW_FLAGS_LAST; 2976ef19298bSStefan Weinhuber last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; 2977f3eb5384SStefan Weinhuber itcw_finalize(itcw); 2978f3eb5384SStefan Weinhuber 2979f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 2980f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 2981f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2982ef19298bSStefan Weinhuber cqr->cpmode = 1; 2983f3eb5384SStefan Weinhuber cqr->startdev = startdev; 2984f3eb5384SStefan Weinhuber cqr->memdev = startdev; 2985f3eb5384SStefan Weinhuber cqr->block = block; 29867c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2987a4d26c6aSStefan Weinhuber cqr->lpm = startdev->path_data.ppm; 2988f3eb5384SStefan Weinhuber cqr->retries = 256; 2989f3eb5384SStefan Weinhuber cqr->buildclk = get_clock(); 2990f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 2991f3eb5384SStefan Weinhuber return cqr; 2992cd10502bSJulia Lawall out_error: 2993cd10502bSJulia Lawall dasd_sfree_request(cqr, startdev); 2994cd10502bSJulia Lawall return ERR_PTR(ret); 2995f3eb5384SStefan Weinhuber } 2996f3eb5384SStefan Weinhuber 2997f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 2998f3eb5384SStefan Weinhuber struct dasd_block *block, 2999f3eb5384SStefan Weinhuber struct request *req) 3000f3eb5384SStefan Weinhuber { 3001ef19298bSStefan Weinhuber int cmdrtd, cmdwtd; 3002f3eb5384SStefan Weinhuber int use_prefix; 3003ef19298bSStefan Weinhuber int fcx_multitrack; 300445b44d76SStefan Weinhuber struct dasd_eckd_private *private; 3005f3eb5384SStefan Weinhuber struct dasd_device *basedev; 3006f3eb5384SStefan Weinhuber sector_t first_rec, last_rec; 3007f3eb5384SStefan Weinhuber sector_t first_trk, last_trk; 3008f3eb5384SStefan Weinhuber unsigned int first_offs, last_offs; 3009f3eb5384SStefan Weinhuber unsigned int blk_per_trk, blksize; 3010f3eb5384SStefan Weinhuber int cdlspecial; 3011ef19298bSStefan Weinhuber unsigned int data_size; 3012f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 3013f3eb5384SStefan Weinhuber 3014f3eb5384SStefan Weinhuber basedev = block->base; 3015f3eb5384SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 3016f3eb5384SStefan Weinhuber 3017f3eb5384SStefan Weinhuber /* Calculate number of blocks/records per track. */ 3018f3eb5384SStefan Weinhuber blksize = block->bp_block; 3019f3eb5384SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 30206fca97a9SStefan Haberland if (blk_per_trk == 0) 30216fca97a9SStefan Haberland return ERR_PTR(-EINVAL); 3022f3eb5384SStefan Weinhuber /* Calculate record id of first and last block. */ 302383096ebfSTejun Heo first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; 3024f3eb5384SStefan Weinhuber first_offs = sector_div(first_trk, blk_per_trk); 3025f3eb5384SStefan Weinhuber last_rec = last_trk = 302683096ebfSTejun Heo (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 3027f3eb5384SStefan Weinhuber last_offs = sector_div(last_trk, blk_per_trk); 3028f3eb5384SStefan Weinhuber cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); 3029f3eb5384SStefan Weinhuber 3030ef19298bSStefan Weinhuber fcx_multitrack = private->features.feature[40] & 0x20; 3031ef19298bSStefan Weinhuber data_size = blk_rq_bytes(req); 3032ef19298bSStefan Weinhuber /* tpm write request add CBC data on each track boundary */ 3033ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 3034ef19298bSStefan Weinhuber data_size += (last_trk - first_trk) * 4; 3035f3eb5384SStefan Weinhuber 3036f3eb5384SStefan Weinhuber /* is read track data and write track data in command mode supported? */ 3037f3eb5384SStefan Weinhuber cmdrtd = private->features.feature[9] & 0x20; 3038f3eb5384SStefan Weinhuber cmdwtd = private->features.feature[12] & 0x40; 3039f3eb5384SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 3040f3eb5384SStefan Weinhuber 3041f3eb5384SStefan Weinhuber cqr = NULL; 3042f3eb5384SStefan Weinhuber if (cdlspecial || dasd_page_cache) { 3043f3eb5384SStefan Weinhuber /* do nothing, just fall through to the cmd mode single case */ 3044ef19298bSStefan Weinhuber } else if ((data_size <= private->fcx_max_data) 3045ef19298bSStefan Weinhuber && (fcx_multitrack || (first_trk == last_trk))) { 3046f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, 3047f3eb5384SStefan Weinhuber first_rec, last_rec, 3048f3eb5384SStefan Weinhuber first_trk, last_trk, 3049f3eb5384SStefan Weinhuber first_offs, last_offs, 3050f3eb5384SStefan Weinhuber blk_per_trk, blksize); 3051ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3052ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 3053f3eb5384SStefan Weinhuber cqr = NULL; 3054f3eb5384SStefan Weinhuber } else if (use_prefix && 3055f3eb5384SStefan Weinhuber (((rq_data_dir(req) == READ) && cmdrtd) || 3056f3eb5384SStefan Weinhuber ((rq_data_dir(req) == WRITE) && cmdwtd))) { 3057f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, 3058f3eb5384SStefan Weinhuber first_rec, last_rec, 3059f3eb5384SStefan Weinhuber first_trk, last_trk, 3060f3eb5384SStefan Weinhuber first_offs, last_offs, 3061f3eb5384SStefan Weinhuber blk_per_trk, blksize); 3062ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3063ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 3064f3eb5384SStefan Weinhuber cqr = NULL; 3065f3eb5384SStefan Weinhuber } 3066f3eb5384SStefan Weinhuber if (!cqr) 3067f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, 3068f3eb5384SStefan Weinhuber first_rec, last_rec, 3069f3eb5384SStefan Weinhuber first_trk, last_trk, 3070f3eb5384SStefan Weinhuber first_offs, last_offs, 3071f3eb5384SStefan Weinhuber blk_per_trk, blksize); 3072f3eb5384SStefan Weinhuber return cqr; 3073f3eb5384SStefan Weinhuber } 3074f3eb5384SStefan Weinhuber 3075e4dbb0f2SStefan Haberland static struct dasd_ccw_req *dasd_raw_build_cp(struct dasd_device *startdev, 3076e4dbb0f2SStefan Haberland struct dasd_block *block, 3077e4dbb0f2SStefan Haberland struct request *req) 3078e4dbb0f2SStefan Haberland { 3079e4dbb0f2SStefan Haberland unsigned long *idaws; 3080e4dbb0f2SStefan Haberland struct dasd_device *basedev; 3081e4dbb0f2SStefan Haberland struct dasd_ccw_req *cqr; 3082e4dbb0f2SStefan Haberland struct ccw1 *ccw; 3083e4dbb0f2SStefan Haberland struct req_iterator iter; 3084e4dbb0f2SStefan Haberland struct bio_vec *bv; 3085e4dbb0f2SStefan Haberland char *dst; 3086e4dbb0f2SStefan Haberland unsigned char cmd; 3087e4dbb0f2SStefan Haberland unsigned int trkcount; 3088e4dbb0f2SStefan Haberland unsigned int seg_len, len_to_track_end; 3089e4dbb0f2SStefan Haberland unsigned int first_offs; 3090e4dbb0f2SStefan Haberland unsigned int cidaw, cplength, datasize; 3091e4dbb0f2SStefan Haberland sector_t first_trk, last_trk; 3092e4dbb0f2SStefan Haberland unsigned int pfx_datasize; 3093e4dbb0f2SStefan Haberland 3094e4dbb0f2SStefan Haberland /* 3095e4dbb0f2SStefan Haberland * raw track access needs to be mutiple of 64k and on 64k boundary 3096e4dbb0f2SStefan Haberland */ 3097e4dbb0f2SStefan Haberland if ((blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK) != 0) { 3098e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EINVAL); 3099e4dbb0f2SStefan Haberland goto out; 3100e4dbb0f2SStefan Haberland } 3101e4dbb0f2SStefan Haberland if (((blk_rq_pos(req) + blk_rq_sectors(req)) % 3102e4dbb0f2SStefan Haberland DASD_RAW_SECTORS_PER_TRACK) != 0) { 3103e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EINVAL); 3104e4dbb0f2SStefan Haberland goto out; 3105e4dbb0f2SStefan Haberland } 3106e4dbb0f2SStefan Haberland 3107e4dbb0f2SStefan Haberland first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; 3108e4dbb0f2SStefan Haberland last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / 3109e4dbb0f2SStefan Haberland DASD_RAW_SECTORS_PER_TRACK; 3110e4dbb0f2SStefan Haberland trkcount = last_trk - first_trk + 1; 3111e4dbb0f2SStefan Haberland first_offs = 0; 3112e4dbb0f2SStefan Haberland basedev = block->base; 3113e4dbb0f2SStefan Haberland 3114e4dbb0f2SStefan Haberland if (rq_data_dir(req) == READ) 3115e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_READ_TRACK; 3116e4dbb0f2SStefan Haberland else if (rq_data_dir(req) == WRITE) 3117e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; 3118e4dbb0f2SStefan Haberland else { 3119e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EINVAL); 3120e4dbb0f2SStefan Haberland goto out; 3121e4dbb0f2SStefan Haberland } 3122e4dbb0f2SStefan Haberland 3123e4dbb0f2SStefan Haberland /* 3124e4dbb0f2SStefan Haberland * Raw track based I/O needs IDAWs for each page, 3125e4dbb0f2SStefan Haberland * and not just for 64 bit addresses. 3126e4dbb0f2SStefan Haberland */ 3127e4dbb0f2SStefan Haberland cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; 3128e4dbb0f2SStefan Haberland 3129e4dbb0f2SStefan Haberland /* 1x prefix + one read/write ccw per track */ 3130e4dbb0f2SStefan Haberland cplength = 1 + trkcount; 3131e4dbb0f2SStefan Haberland 3132e4dbb0f2SStefan Haberland /* 3133e4dbb0f2SStefan Haberland * struct PFX_eckd_data has up to 2 byte as extended parameter 3134e4dbb0f2SStefan Haberland * this is needed for write full track and has to be mentioned 313525985edcSLucas De Marchi * separately 3136e4dbb0f2SStefan Haberland * add 8 instead of 2 to keep 8 byte boundary 3137e4dbb0f2SStefan Haberland */ 3138e4dbb0f2SStefan Haberland pfx_datasize = sizeof(struct PFX_eckd_data) + 8; 3139e4dbb0f2SStefan Haberland 3140e4dbb0f2SStefan Haberland datasize = pfx_datasize + cidaw * sizeof(unsigned long long); 3141e4dbb0f2SStefan Haberland 3142e4dbb0f2SStefan Haberland /* Allocate the ccw request. */ 3143e4dbb0f2SStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 3144e4dbb0f2SStefan Haberland datasize, startdev); 3145e4dbb0f2SStefan Haberland if (IS_ERR(cqr)) 3146e4dbb0f2SStefan Haberland goto out; 3147e4dbb0f2SStefan Haberland ccw = cqr->cpaddr; 3148e4dbb0f2SStefan Haberland 3149e4dbb0f2SStefan Haberland if (prefix_LRE(ccw++, cqr->data, first_trk, last_trk, cmd, 3150e4dbb0f2SStefan Haberland basedev, startdev, 1 /* format */, first_offs + 1, 3151e4dbb0f2SStefan Haberland trkcount, 0, 0) == -EAGAIN) { 3152e4dbb0f2SStefan Haberland /* Clock not in sync and XRC is enabled. 3153e4dbb0f2SStefan Haberland * Try again later. 3154e4dbb0f2SStefan Haberland */ 3155e4dbb0f2SStefan Haberland dasd_sfree_request(cqr, startdev); 3156e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EAGAIN); 3157e4dbb0f2SStefan Haberland goto out; 3158e4dbb0f2SStefan Haberland } 3159e4dbb0f2SStefan Haberland 3160e4dbb0f2SStefan Haberland idaws = (unsigned long *)(cqr->data + pfx_datasize); 3161e4dbb0f2SStefan Haberland 3162e4dbb0f2SStefan Haberland len_to_track_end = 0; 3163e4dbb0f2SStefan Haberland 3164e4dbb0f2SStefan Haberland rq_for_each_segment(bv, req, iter) { 3165e4dbb0f2SStefan Haberland dst = page_address(bv->bv_page) + bv->bv_offset; 3166e4dbb0f2SStefan Haberland seg_len = bv->bv_len; 3167e4dbb0f2SStefan Haberland if (!len_to_track_end) { 3168e4dbb0f2SStefan Haberland ccw[-1].flags |= CCW_FLAG_CC; 3169e4dbb0f2SStefan Haberland ccw->cmd_code = cmd; 3170e4dbb0f2SStefan Haberland /* maximum 3390 track size */ 3171e4dbb0f2SStefan Haberland ccw->count = 57326; 3172e4dbb0f2SStefan Haberland /* 64k map to one track */ 3173e4dbb0f2SStefan Haberland len_to_track_end = 65536; 3174e4dbb0f2SStefan Haberland ccw->cda = (__u32)(addr_t)idaws; 3175e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_IDA; 3176e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 3177e4dbb0f2SStefan Haberland ccw++; 3178e4dbb0f2SStefan Haberland } 3179e4dbb0f2SStefan Haberland len_to_track_end -= seg_len; 3180e4dbb0f2SStefan Haberland idaws = idal_create_words(idaws, dst, seg_len); 3181e4dbb0f2SStefan Haberland } 3182e4dbb0f2SStefan Haberland 3183e4dbb0f2SStefan Haberland if (blk_noretry_request(req) || 3184e4dbb0f2SStefan Haberland block->base->features & DASD_FEATURE_FAILFAST) 3185e4dbb0f2SStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3186e4dbb0f2SStefan Haberland cqr->startdev = startdev; 3187e4dbb0f2SStefan Haberland cqr->memdev = startdev; 3188e4dbb0f2SStefan Haberland cqr->block = block; 3189e4dbb0f2SStefan Haberland cqr->expires = startdev->default_expires * HZ; 3190e4dbb0f2SStefan Haberland cqr->lpm = startdev->path_data.ppm; 3191e4dbb0f2SStefan Haberland cqr->retries = 256; 3192e4dbb0f2SStefan Haberland cqr->buildclk = get_clock(); 3193e4dbb0f2SStefan Haberland cqr->status = DASD_CQR_FILLED; 3194e4dbb0f2SStefan Haberland 3195e4dbb0f2SStefan Haberland if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN) 3196e4dbb0f2SStefan Haberland cqr = NULL; 3197e4dbb0f2SStefan Haberland out: 3198e4dbb0f2SStefan Haberland return cqr; 3199e4dbb0f2SStefan Haberland } 3200e4dbb0f2SStefan Haberland 3201e4dbb0f2SStefan Haberland 32021da177e4SLinus Torvalds static int 32031da177e4SLinus Torvalds dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 32041da177e4SLinus Torvalds { 32051da177e4SLinus Torvalds struct dasd_eckd_private *private; 32061da177e4SLinus Torvalds struct ccw1 *ccw; 32075705f702SNeilBrown struct req_iterator iter; 32081da177e4SLinus Torvalds struct bio_vec *bv; 32091da177e4SLinus Torvalds char *dst, *cda; 32101da177e4SLinus Torvalds unsigned int blksize, blk_per_trk, off; 32111da177e4SLinus Torvalds sector_t recid; 32125705f702SNeilBrown int status; 32131da177e4SLinus Torvalds 32141da177e4SLinus Torvalds if (!dasd_page_cache) 32151da177e4SLinus Torvalds goto out; 32168e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) cqr->block->base->private; 32178e09f215SStefan Weinhuber blksize = cqr->block->bp_block; 32181da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 321983096ebfSTejun Heo recid = blk_rq_pos(req) >> cqr->block->s2b_shift; 32201da177e4SLinus Torvalds ccw = cqr->cpaddr; 32211da177e4SLinus Torvalds /* Skip over define extent & locate record. */ 32221da177e4SLinus Torvalds ccw++; 32231da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 32241da177e4SLinus Torvalds ccw++; 32255705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 32261da177e4SLinus Torvalds dst = page_address(bv->bv_page) + bv->bv_offset; 32271da177e4SLinus Torvalds for (off = 0; off < bv->bv_len; off += blksize) { 32281da177e4SLinus Torvalds /* Skip locate record. */ 32291da177e4SLinus Torvalds if (private->uses_cdl && recid <= 2*blk_per_trk) 32301da177e4SLinus Torvalds ccw++; 32311da177e4SLinus Torvalds if (dst) { 32321da177e4SLinus Torvalds if (ccw->flags & CCW_FLAG_IDA) 32331da177e4SLinus Torvalds cda = *((char **)((addr_t) ccw->cda)); 32341da177e4SLinus Torvalds else 32351da177e4SLinus Torvalds cda = (char *)((addr_t) ccw->cda); 32361da177e4SLinus Torvalds if (dst != cda) { 32371da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 32381da177e4SLinus Torvalds memcpy(dst, cda, bv->bv_len); 32391da177e4SLinus Torvalds kmem_cache_free(dasd_page_cache, 32401da177e4SLinus Torvalds (void *)((addr_t)cda & PAGE_MASK)); 32411da177e4SLinus Torvalds } 32421da177e4SLinus Torvalds dst = NULL; 32431da177e4SLinus Torvalds } 32441da177e4SLinus Torvalds ccw++; 32451da177e4SLinus Torvalds recid++; 32461da177e4SLinus Torvalds } 32471da177e4SLinus Torvalds } 32481da177e4SLinus Torvalds out: 32491da177e4SLinus Torvalds status = cqr->status == DASD_CQR_DONE; 32508e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 32511da177e4SLinus Torvalds return status; 32521da177e4SLinus Torvalds } 32531da177e4SLinus Torvalds 32548e09f215SStefan Weinhuber /* 3255f3eb5384SStefan Weinhuber * Modify ccw/tcw in cqr so it can be started on a base device. 32568e09f215SStefan Weinhuber * 32578e09f215SStefan Weinhuber * Note that this is not enough to restart the cqr! 32588e09f215SStefan Weinhuber * Either reset cqr->startdev as well (summary unit check handling) 32598e09f215SStefan Weinhuber * or restart via separate cqr (as in ERP handling). 32608e09f215SStefan Weinhuber */ 32618e09f215SStefan Weinhuber void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 32628e09f215SStefan Weinhuber { 32638e09f215SStefan Weinhuber struct ccw1 *ccw; 32648e09f215SStefan Weinhuber struct PFX_eckd_data *pfxdata; 3265f3eb5384SStefan Weinhuber struct tcw *tcw; 3266f3eb5384SStefan Weinhuber struct tccb *tccb; 3267f3eb5384SStefan Weinhuber struct dcw *dcw; 32688e09f215SStefan Weinhuber 3269f3eb5384SStefan Weinhuber if (cqr->cpmode == 1) { 3270f3eb5384SStefan Weinhuber tcw = cqr->cpaddr; 3271f3eb5384SStefan Weinhuber tccb = tcw_get_tccb(tcw); 3272f3eb5384SStefan Weinhuber dcw = (struct dcw *)&tccb->tca[0]; 3273f3eb5384SStefan Weinhuber pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; 3274f3eb5384SStefan Weinhuber pfxdata->validity.verify_base = 0; 3275f3eb5384SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 3276f3eb5384SStefan Weinhuber } else { 32778e09f215SStefan Weinhuber ccw = cqr->cpaddr; 32788e09f215SStefan Weinhuber pfxdata = cqr->data; 32798e09f215SStefan Weinhuber if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 32808e09f215SStefan Weinhuber pfxdata->validity.verify_base = 0; 32818e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 32828e09f215SStefan Weinhuber } 32838e09f215SStefan Weinhuber } 3284f3eb5384SStefan Weinhuber } 32858e09f215SStefan Weinhuber 32868e09f215SStefan Weinhuber #define DASD_ECKD_CHANQ_MAX_SIZE 4 32878e09f215SStefan Weinhuber 32888e09f215SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 32898e09f215SStefan Weinhuber struct dasd_block *block, 32908e09f215SStefan Weinhuber struct request *req) 32918e09f215SStefan Weinhuber { 32928e09f215SStefan Weinhuber struct dasd_eckd_private *private; 32938e09f215SStefan Weinhuber struct dasd_device *startdev; 32948e09f215SStefan Weinhuber unsigned long flags; 32958e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 32968e09f215SStefan Weinhuber 32978e09f215SStefan Weinhuber startdev = dasd_alias_get_start_dev(base); 32988e09f215SStefan Weinhuber if (!startdev) 32998e09f215SStefan Weinhuber startdev = base; 33008e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) startdev->private; 33018e09f215SStefan Weinhuber if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 33028e09f215SStefan Weinhuber return ERR_PTR(-EBUSY); 33038e09f215SStefan Weinhuber 33048e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 33058e09f215SStefan Weinhuber private->count++; 3306e4dbb0f2SStefan Haberland if ((base->features & DASD_FEATURE_USERAW)) 3307e4dbb0f2SStefan Haberland cqr = dasd_raw_build_cp(startdev, block, req); 3308e4dbb0f2SStefan Haberland else 33098e09f215SStefan Weinhuber cqr = dasd_eckd_build_cp(startdev, block, req); 33108e09f215SStefan Weinhuber if (IS_ERR(cqr)) 33118e09f215SStefan Weinhuber private->count--; 33128e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 33138e09f215SStefan Weinhuber return cqr; 33148e09f215SStefan Weinhuber } 33158e09f215SStefan Weinhuber 33168e09f215SStefan Weinhuber static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 33178e09f215SStefan Weinhuber struct request *req) 33188e09f215SStefan Weinhuber { 33198e09f215SStefan Weinhuber struct dasd_eckd_private *private; 33208e09f215SStefan Weinhuber unsigned long flags; 33218e09f215SStefan Weinhuber 33228e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 33238e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) cqr->memdev->private; 33248e09f215SStefan Weinhuber private->count--; 33258e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 33268e09f215SStefan Weinhuber return dasd_eckd_free_cp(cqr, req); 33278e09f215SStefan Weinhuber } 33288e09f215SStefan Weinhuber 33291da177e4SLinus Torvalds static int 33301da177e4SLinus Torvalds dasd_eckd_fill_info(struct dasd_device * device, 33311da177e4SLinus Torvalds struct dasd_information2_t * info) 33321da177e4SLinus Torvalds { 33331da177e4SLinus Torvalds struct dasd_eckd_private *private; 33341da177e4SLinus Torvalds 33351da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 33361da177e4SLinus Torvalds info->label_block = 2; 33371da177e4SLinus Torvalds info->FBA_layout = private->uses_cdl ? 0 : 1; 33381da177e4SLinus Torvalds info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 33391da177e4SLinus Torvalds info->characteristics_size = sizeof(struct dasd_eckd_characteristics); 33401da177e4SLinus Torvalds memcpy(info->characteristics, &private->rdc_data, 33411da177e4SLinus Torvalds sizeof(struct dasd_eckd_characteristics)); 33424abb08c2SStefan Weinhuber info->confdata_size = min((unsigned long)private->conf_len, 33434abb08c2SStefan Weinhuber sizeof(info->configuration_data)); 33444abb08c2SStefan Weinhuber memcpy(info->configuration_data, private->conf_data, 33454abb08c2SStefan Weinhuber info->confdata_size); 33461da177e4SLinus Torvalds return 0; 33471da177e4SLinus Torvalds } 33481da177e4SLinus Torvalds 33491da177e4SLinus Torvalds /* 33501da177e4SLinus Torvalds * SECTION: ioctl functions for eckd devices. 33511da177e4SLinus Torvalds */ 33521da177e4SLinus Torvalds 33531da177e4SLinus Torvalds /* 33541da177e4SLinus Torvalds * Release device ioctl. 33551da177e4SLinus Torvalds * Buils a channel programm to releases a prior reserved 33561da177e4SLinus Torvalds * (see dasd_eckd_reserve) device. 33571da177e4SLinus Torvalds */ 33581da177e4SLinus Torvalds static int 33591107ccfbSChristoph Hellwig dasd_eckd_release(struct dasd_device *device) 33601da177e4SLinus Torvalds { 33611da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 33621da177e4SLinus Torvalds int rc; 3363f3eb5384SStefan Weinhuber struct ccw1 *ccw; 3364f932bceaSStefan Weinhuber int useglobal; 33651da177e4SLinus Torvalds 33661da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 33671da177e4SLinus Torvalds return -EACCES; 33681da177e4SLinus Torvalds 3369f932bceaSStefan Weinhuber useglobal = 0; 337068b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 33711da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3372f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3373f932bceaSStefan Weinhuber useglobal = 1; 3374f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3375f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3376f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3377f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3378f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3379f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3380f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 33811da177e4SLinus Torvalds } 3382f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 3383f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RELEASE; 3384f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3385f3eb5384SStefan Weinhuber ccw->count = 32; 3386f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 33878e09f215SStefan Weinhuber cqr->startdev = device; 33888e09f215SStefan Weinhuber cqr->memdev = device; 33891da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 33901c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3391336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 33921da177e4SLinus Torvalds cqr->expires = 2 * HZ; 33931da177e4SLinus Torvalds cqr->buildclk = get_clock(); 33941da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 33951da177e4SLinus Torvalds 33961da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 33975a27e60dSStefan Weinhuber if (!rc) 33985a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 33991da177e4SLinus Torvalds 3400f932bceaSStefan Weinhuber if (useglobal) 3401f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3402f932bceaSStefan Weinhuber else 34038e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 34041da177e4SLinus Torvalds return rc; 34051da177e4SLinus Torvalds } 34061da177e4SLinus Torvalds 34071da177e4SLinus Torvalds /* 34081da177e4SLinus Torvalds * Reserve device ioctl. 34091da177e4SLinus Torvalds * Options are set to 'synchronous wait for interrupt' and 34101da177e4SLinus Torvalds * 'timeout the request'. This leads to a terminate IO if 34111da177e4SLinus Torvalds * the interrupt is outstanding for a certain time. 34121da177e4SLinus Torvalds */ 34131da177e4SLinus Torvalds static int 34141107ccfbSChristoph Hellwig dasd_eckd_reserve(struct dasd_device *device) 34151da177e4SLinus Torvalds { 34161da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 34171da177e4SLinus Torvalds int rc; 3418f3eb5384SStefan Weinhuber struct ccw1 *ccw; 3419f932bceaSStefan Weinhuber int useglobal; 34201da177e4SLinus Torvalds 34211da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 34221da177e4SLinus Torvalds return -EACCES; 34231da177e4SLinus Torvalds 3424f932bceaSStefan Weinhuber useglobal = 0; 342568b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 34261da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3427f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3428f932bceaSStefan Weinhuber useglobal = 1; 3429f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3430f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3431f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3432f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3433f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3434f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3435f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 34361da177e4SLinus Torvalds } 3437f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 3438f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RESERVE; 3439f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3440f3eb5384SStefan Weinhuber ccw->count = 32; 3441f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 34428e09f215SStefan Weinhuber cqr->startdev = device; 34438e09f215SStefan Weinhuber cqr->memdev = device; 34441da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 34451c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3446336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 34471da177e4SLinus Torvalds cqr->expires = 2 * HZ; 34481da177e4SLinus Torvalds cqr->buildclk = get_clock(); 34491da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 34501da177e4SLinus Torvalds 34511da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 34525a27e60dSStefan Weinhuber if (!rc) 34535a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 34541da177e4SLinus Torvalds 3455f932bceaSStefan Weinhuber if (useglobal) 3456f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3457f932bceaSStefan Weinhuber else 34588e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 34591da177e4SLinus Torvalds return rc; 34601da177e4SLinus Torvalds } 34611da177e4SLinus Torvalds 34621da177e4SLinus Torvalds /* 34631da177e4SLinus Torvalds * Steal lock ioctl - unconditional reserve device. 34641da177e4SLinus Torvalds * Buils a channel programm to break a device's reservation. 34651da177e4SLinus Torvalds * (unconditional reserve) 34661da177e4SLinus Torvalds */ 34671da177e4SLinus Torvalds static int 34681107ccfbSChristoph Hellwig dasd_eckd_steal_lock(struct dasd_device *device) 34691da177e4SLinus Torvalds { 34701da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 34711da177e4SLinus Torvalds int rc; 3472f3eb5384SStefan Weinhuber struct ccw1 *ccw; 3473f932bceaSStefan Weinhuber int useglobal; 34741da177e4SLinus Torvalds 34751da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 34761da177e4SLinus Torvalds return -EACCES; 34771da177e4SLinus Torvalds 3478f932bceaSStefan Weinhuber useglobal = 0; 347968b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 34801da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3481f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3482f932bceaSStefan Weinhuber useglobal = 1; 3483f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3484f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3485f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3486f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3487f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3488f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3489f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 34901da177e4SLinus Torvalds } 3491f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 3492f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SLCK; 3493f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3494f3eb5384SStefan Weinhuber ccw->count = 32; 3495f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 34968e09f215SStefan Weinhuber cqr->startdev = device; 34978e09f215SStefan Weinhuber cqr->memdev = device; 34981da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 34991c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3500336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 35011da177e4SLinus Torvalds cqr->expires = 2 * HZ; 35021da177e4SLinus Torvalds cqr->buildclk = get_clock(); 35031da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 35041da177e4SLinus Torvalds 35051da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 35065a27e60dSStefan Weinhuber if (!rc) 35075a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 35081da177e4SLinus Torvalds 3509f932bceaSStefan Weinhuber if (useglobal) 3510f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3511f932bceaSStefan Weinhuber else 35128e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 35131da177e4SLinus Torvalds return rc; 35141da177e4SLinus Torvalds } 35151da177e4SLinus Torvalds 35161da177e4SLinus Torvalds /* 3517196339f1SStefan Weinhuber * SNID - Sense Path Group ID 3518196339f1SStefan Weinhuber * This ioctl may be used in situations where I/O is stalled due to 3519196339f1SStefan Weinhuber * a reserve, so if the normal dasd_smalloc_request fails, we use the 3520196339f1SStefan Weinhuber * preallocated dasd_reserve_req. 3521196339f1SStefan Weinhuber */ 3522196339f1SStefan Weinhuber static int dasd_eckd_snid(struct dasd_device *device, 3523196339f1SStefan Weinhuber void __user *argp) 3524196339f1SStefan Weinhuber { 3525196339f1SStefan Weinhuber struct dasd_ccw_req *cqr; 3526196339f1SStefan Weinhuber int rc; 3527196339f1SStefan Weinhuber struct ccw1 *ccw; 3528196339f1SStefan Weinhuber int useglobal; 3529196339f1SStefan Weinhuber struct dasd_snid_ioctl_data usrparm; 3530196339f1SStefan Weinhuber 3531196339f1SStefan Weinhuber if (!capable(CAP_SYS_ADMIN)) 3532196339f1SStefan Weinhuber return -EACCES; 3533196339f1SStefan Weinhuber 3534196339f1SStefan Weinhuber if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 3535196339f1SStefan Weinhuber return -EFAULT; 3536196339f1SStefan Weinhuber 3537196339f1SStefan Weinhuber useglobal = 0; 3538196339f1SStefan Weinhuber cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 3539196339f1SStefan Weinhuber sizeof(struct dasd_snid_data), device); 3540196339f1SStefan Weinhuber if (IS_ERR(cqr)) { 3541196339f1SStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3542196339f1SStefan Weinhuber useglobal = 1; 3543196339f1SStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3544196339f1SStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3545196339f1SStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3546196339f1SStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3547196339f1SStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3548196339f1SStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3549196339f1SStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 3550196339f1SStefan Weinhuber } 3551196339f1SStefan Weinhuber ccw = cqr->cpaddr; 3552196339f1SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SNID; 3553196339f1SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3554196339f1SStefan Weinhuber ccw->count = 12; 3555196339f1SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 3556196339f1SStefan Weinhuber cqr->startdev = device; 3557196339f1SStefan Weinhuber cqr->memdev = device; 3558196339f1SStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3559196339f1SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 35605a27e60dSStefan Weinhuber set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 3561196339f1SStefan Weinhuber cqr->retries = 5; 3562196339f1SStefan Weinhuber cqr->expires = 10 * HZ; 3563196339f1SStefan Weinhuber cqr->buildclk = get_clock(); 3564196339f1SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 3565196339f1SStefan Weinhuber cqr->lpm = usrparm.path_mask; 3566196339f1SStefan Weinhuber 3567196339f1SStefan Weinhuber rc = dasd_sleep_on_immediatly(cqr); 3568196339f1SStefan Weinhuber /* verify that I/O processing didn't modify the path mask */ 3569196339f1SStefan Weinhuber if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) 3570196339f1SStefan Weinhuber rc = -EIO; 3571196339f1SStefan Weinhuber if (!rc) { 3572196339f1SStefan Weinhuber usrparm.data = *((struct dasd_snid_data *)cqr->data); 3573196339f1SStefan Weinhuber if (copy_to_user(argp, &usrparm, sizeof(usrparm))) 3574196339f1SStefan Weinhuber rc = -EFAULT; 3575196339f1SStefan Weinhuber } 3576196339f1SStefan Weinhuber 3577196339f1SStefan Weinhuber if (useglobal) 3578196339f1SStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3579196339f1SStefan Weinhuber else 3580196339f1SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 3581196339f1SStefan Weinhuber return rc; 3582196339f1SStefan Weinhuber } 3583196339f1SStefan Weinhuber 3584196339f1SStefan Weinhuber /* 35851da177e4SLinus Torvalds * Read performance statistics 35861da177e4SLinus Torvalds */ 35871da177e4SLinus Torvalds static int 35881107ccfbSChristoph Hellwig dasd_eckd_performance(struct dasd_device *device, void __user *argp) 35891da177e4SLinus Torvalds { 35901da177e4SLinus Torvalds struct dasd_psf_prssd_data *prssdp; 35911da177e4SLinus Torvalds struct dasd_rssd_perf_stats_t *stats; 35921da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 35931da177e4SLinus Torvalds struct ccw1 *ccw; 35941da177e4SLinus Torvalds int rc; 35951da177e4SLinus Torvalds 359668b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 35971da177e4SLinus Torvalds (sizeof(struct dasd_psf_prssd_data) + 35981da177e4SLinus Torvalds sizeof(struct dasd_rssd_perf_stats_t)), 35991da177e4SLinus Torvalds device); 36001da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3601fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 36021da177e4SLinus Torvalds "Could not allocate initialization request"); 36031da177e4SLinus Torvalds return PTR_ERR(cqr); 36041da177e4SLinus Torvalds } 36058e09f215SStefan Weinhuber cqr->startdev = device; 36068e09f215SStefan Weinhuber cqr->memdev = device; 36071da177e4SLinus Torvalds cqr->retries = 0; 3608eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 36091da177e4SLinus Torvalds cqr->expires = 10 * HZ; 36101da177e4SLinus Torvalds 36111da177e4SLinus Torvalds /* Prepare for Read Subsystem Data */ 36121da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 36131da177e4SLinus Torvalds memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 36141da177e4SLinus Torvalds prssdp->order = PSF_ORDER_PRSSD; 36155d67d164SJoe Perches prssdp->suborder = 0x01; /* Performance Statistics */ 36161da177e4SLinus Torvalds prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 36171da177e4SLinus Torvalds 36181da177e4SLinus Torvalds ccw = cqr->cpaddr; 36191da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_PSF; 36201da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_psf_prssd_data); 36211da177e4SLinus Torvalds ccw->flags |= CCW_FLAG_CC; 36221da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) prssdp; 36231da177e4SLinus Torvalds 36241da177e4SLinus Torvalds /* Read Subsystem Data - Performance Statistics */ 36251da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 36261da177e4SLinus Torvalds memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 36271da177e4SLinus Torvalds 36281da177e4SLinus Torvalds ccw++; 36291da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_RSSD; 36301da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 36311da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) stats; 36321da177e4SLinus Torvalds 36331da177e4SLinus Torvalds cqr->buildclk = get_clock(); 36341da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 36351da177e4SLinus Torvalds rc = dasd_sleep_on(cqr); 36361da177e4SLinus Torvalds if (rc == 0) { 36371da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 36381da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 36391107ccfbSChristoph Hellwig if (copy_to_user(argp, stats, 36401107ccfbSChristoph Hellwig sizeof(struct dasd_rssd_perf_stats_t))) 36411107ccfbSChristoph Hellwig rc = -EFAULT; 36421da177e4SLinus Torvalds } 36438e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 36441da177e4SLinus Torvalds return rc; 36451da177e4SLinus Torvalds } 36461da177e4SLinus Torvalds 36471da177e4SLinus Torvalds /* 36481da177e4SLinus Torvalds * Get attributes (cache operations) 36491da177e4SLinus Torvalds * Returnes the cache attributes used in Define Extend (DE). 36501da177e4SLinus Torvalds */ 36511da177e4SLinus Torvalds static int 36521107ccfbSChristoph Hellwig dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 36531da177e4SLinus Torvalds { 36541107ccfbSChristoph Hellwig struct dasd_eckd_private *private = 36551107ccfbSChristoph Hellwig (struct dasd_eckd_private *)device->private; 36561107ccfbSChristoph Hellwig struct attrib_data_t attrib = private->attrib; 36571da177e4SLinus Torvalds int rc; 36581da177e4SLinus Torvalds 36591da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 36601da177e4SLinus Torvalds return -EACCES; 36611107ccfbSChristoph Hellwig if (!argp) 36621da177e4SLinus Torvalds return -EINVAL; 36631da177e4SLinus Torvalds 36641107ccfbSChristoph Hellwig rc = 0; 36651107ccfbSChristoph Hellwig if (copy_to_user(argp, (long *) &attrib, 36661107ccfbSChristoph Hellwig sizeof(struct attrib_data_t))) 36671107ccfbSChristoph Hellwig rc = -EFAULT; 36681da177e4SLinus Torvalds 36691da177e4SLinus Torvalds return rc; 36701da177e4SLinus Torvalds } 36711da177e4SLinus Torvalds 36721da177e4SLinus Torvalds /* 36731da177e4SLinus Torvalds * Set attributes (cache operations) 36741da177e4SLinus Torvalds * Stores the attributes for cache operation to be used in Define Extend (DE). 36751da177e4SLinus Torvalds */ 36761da177e4SLinus Torvalds static int 36771107ccfbSChristoph Hellwig dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 36781da177e4SLinus Torvalds { 36791107ccfbSChristoph Hellwig struct dasd_eckd_private *private = 36801107ccfbSChristoph Hellwig (struct dasd_eckd_private *)device->private; 36811da177e4SLinus Torvalds struct attrib_data_t attrib; 36821da177e4SLinus Torvalds 36831da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 36841da177e4SLinus Torvalds return -EACCES; 36851107ccfbSChristoph Hellwig if (!argp) 36861da177e4SLinus Torvalds return -EINVAL; 36871da177e4SLinus Torvalds 36881107ccfbSChristoph Hellwig if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 36891da177e4SLinus Torvalds return -EFAULT; 36901da177e4SLinus Torvalds private->attrib = attrib; 36911da177e4SLinus Torvalds 3692fc19f381SStefan Haberland dev_info(&device->cdev->dev, 3693fc19f381SStefan Haberland "The DASD cache mode was set to %x (%i cylinder prestage)\n", 36941da177e4SLinus Torvalds private->attrib.operation, private->attrib.nr_cyl); 36951da177e4SLinus Torvalds return 0; 36961da177e4SLinus Torvalds } 36971da177e4SLinus Torvalds 3698ab1d848fSNigel Hislop /* 3699ab1d848fSNigel Hislop * Issue syscall I/O to EMC Symmetrix array. 3700ab1d848fSNigel Hislop * CCWs are PSF and RSSD 3701ab1d848fSNigel Hislop */ 3702ab1d848fSNigel Hislop static int dasd_symm_io(struct dasd_device *device, void __user *argp) 3703ab1d848fSNigel Hislop { 3704ab1d848fSNigel Hislop struct dasd_symmio_parms usrparm; 3705ab1d848fSNigel Hislop char *psf_data, *rssd_result; 3706ab1d848fSNigel Hislop struct dasd_ccw_req *cqr; 3707ab1d848fSNigel Hislop struct ccw1 *ccw; 370852898025SNigel Hislop char psf0, psf1; 3709ab1d848fSNigel Hislop int rc; 3710ab1d848fSNigel Hislop 371152898025SNigel Hislop if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) 371252898025SNigel Hislop return -EACCES; 371352898025SNigel Hislop psf0 = psf1 = 0; 371452898025SNigel Hislop 3715ab1d848fSNigel Hislop /* Copy parms from caller */ 3716ab1d848fSNigel Hislop rc = -EFAULT; 3717ab1d848fSNigel Hislop if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 3718ab1d848fSNigel Hislop goto out; 3719f8b06859SHeiko Carstens if (is_compat_task() || sizeof(long) == 4) { 3720ab1d848fSNigel Hislop /* Make sure pointers are sane even on 31 bit. */ 3721ab1d848fSNigel Hislop rc = -EINVAL; 3722f8b06859SHeiko Carstens if ((usrparm.psf_data >> 32) != 0) 3723ab1d848fSNigel Hislop goto out; 3724f8b06859SHeiko Carstens if ((usrparm.rssd_result >> 32) != 0) 3725f8b06859SHeiko Carstens goto out; 3726f8b06859SHeiko Carstens usrparm.psf_data &= 0x7fffffffULL; 3727f8b06859SHeiko Carstens usrparm.rssd_result &= 0x7fffffffULL; 3728ab1d848fSNigel Hislop } 3729ab1d848fSNigel Hislop /* alloc I/O data area */ 3730ab1d848fSNigel Hislop psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 3731ab1d848fSNigel Hislop rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 3732ab1d848fSNigel Hislop if (!psf_data || !rssd_result) { 3733ab1d848fSNigel Hislop rc = -ENOMEM; 3734ab1d848fSNigel Hislop goto out_free; 3735ab1d848fSNigel Hislop } 3736ab1d848fSNigel Hislop 3737ab1d848fSNigel Hislop /* get syscall header from user space */ 3738ab1d848fSNigel Hislop rc = -EFAULT; 3739ab1d848fSNigel Hislop if (copy_from_user(psf_data, 3740ab1d848fSNigel Hislop (void __user *)(unsigned long) usrparm.psf_data, 3741ab1d848fSNigel Hislop usrparm.psf_data_len)) 3742ab1d848fSNigel Hislop goto out_free; 374352898025SNigel Hislop psf0 = psf_data[0]; 374452898025SNigel Hislop psf1 = psf_data[1]; 3745ab1d848fSNigel Hislop 3746ab1d848fSNigel Hislop /* setup CCWs for PSF + RSSD */ 374768b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device); 3748ab1d848fSNigel Hislop if (IS_ERR(cqr)) { 3749fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3750ab1d848fSNigel Hislop "Could not allocate initialization request"); 3751ab1d848fSNigel Hislop rc = PTR_ERR(cqr); 3752ab1d848fSNigel Hislop goto out_free; 3753ab1d848fSNigel Hislop } 3754ab1d848fSNigel Hislop 3755ab1d848fSNigel Hislop cqr->startdev = device; 3756ab1d848fSNigel Hislop cqr->memdev = device; 3757ab1d848fSNigel Hislop cqr->retries = 3; 3758ab1d848fSNigel Hislop cqr->expires = 10 * HZ; 3759ab1d848fSNigel Hislop cqr->buildclk = get_clock(); 3760ab1d848fSNigel Hislop cqr->status = DASD_CQR_FILLED; 3761ab1d848fSNigel Hislop 3762ab1d848fSNigel Hislop /* Build the ccws */ 3763ab1d848fSNigel Hislop ccw = cqr->cpaddr; 3764ab1d848fSNigel Hislop 3765ab1d848fSNigel Hislop /* PSF ccw */ 3766ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_PSF; 3767ab1d848fSNigel Hislop ccw->count = usrparm.psf_data_len; 3768ab1d848fSNigel Hislop ccw->flags |= CCW_FLAG_CC; 3769ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) psf_data; 3770ab1d848fSNigel Hislop 3771ab1d848fSNigel Hislop ccw++; 3772ab1d848fSNigel Hislop 3773ab1d848fSNigel Hislop /* RSSD ccw */ 3774ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_RSSD; 3775ab1d848fSNigel Hislop ccw->count = usrparm.rssd_result_len; 3776ab1d848fSNigel Hislop ccw->flags = CCW_FLAG_SLI ; 3777ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) rssd_result; 3778ab1d848fSNigel Hislop 3779ab1d848fSNigel Hislop rc = dasd_sleep_on(cqr); 3780ab1d848fSNigel Hislop if (rc) 3781ab1d848fSNigel Hislop goto out_sfree; 3782ab1d848fSNigel Hislop 3783ab1d848fSNigel Hislop rc = -EFAULT; 3784ab1d848fSNigel Hislop if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 3785ab1d848fSNigel Hislop rssd_result, usrparm.rssd_result_len)) 3786ab1d848fSNigel Hislop goto out_sfree; 3787ab1d848fSNigel Hislop rc = 0; 3788ab1d848fSNigel Hislop 3789ab1d848fSNigel Hislop out_sfree: 3790ab1d848fSNigel Hislop dasd_sfree_request(cqr, cqr->memdev); 3791ab1d848fSNigel Hislop out_free: 3792ab1d848fSNigel Hislop kfree(rssd_result); 3793ab1d848fSNigel Hislop kfree(psf_data); 3794ab1d848fSNigel Hislop out: 379552898025SNigel Hislop DBF_DEV_EVENT(DBF_WARNING, device, 379652898025SNigel Hislop "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", 379752898025SNigel Hislop (int) psf0, (int) psf1, rc); 3798ab1d848fSNigel Hislop return rc; 3799ab1d848fSNigel Hislop } 3800ab1d848fSNigel Hislop 38011107ccfbSChristoph Hellwig static int 38028e09f215SStefan Weinhuber dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 38031107ccfbSChristoph Hellwig { 38048e09f215SStefan Weinhuber struct dasd_device *device = block->base; 38058e09f215SStefan Weinhuber 38061107ccfbSChristoph Hellwig switch (cmd) { 38071107ccfbSChristoph Hellwig case BIODASDGATTR: 38081107ccfbSChristoph Hellwig return dasd_eckd_get_attrib(device, argp); 38091107ccfbSChristoph Hellwig case BIODASDSATTR: 38101107ccfbSChristoph Hellwig return dasd_eckd_set_attrib(device, argp); 38111107ccfbSChristoph Hellwig case BIODASDPSRD: 38121107ccfbSChristoph Hellwig return dasd_eckd_performance(device, argp); 38131107ccfbSChristoph Hellwig case BIODASDRLSE: 38141107ccfbSChristoph Hellwig return dasd_eckd_release(device); 38151107ccfbSChristoph Hellwig case BIODASDRSRV: 38161107ccfbSChristoph Hellwig return dasd_eckd_reserve(device); 38171107ccfbSChristoph Hellwig case BIODASDSLCK: 38181107ccfbSChristoph Hellwig return dasd_eckd_steal_lock(device); 3819196339f1SStefan Weinhuber case BIODASDSNID: 3820196339f1SStefan Weinhuber return dasd_eckd_snid(device, argp); 3821ab1d848fSNigel Hislop case BIODASDSYMMIO: 3822ab1d848fSNigel Hislop return dasd_symm_io(device, argp); 38231107ccfbSChristoph Hellwig default: 38246b79d14eSHeiko Carstens return -ENOTTY; 38251107ccfbSChristoph Hellwig } 38261107ccfbSChristoph Hellwig } 38271107ccfbSChristoph Hellwig 38281da177e4SLinus Torvalds /* 3829445b5b49SHorst Hummel * Dump the range of CCWs into 'page' buffer 3830445b5b49SHorst Hummel * and return number of printed chars. 3831445b5b49SHorst Hummel */ 38324d284cacSHeiko Carstens static int 3833445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 3834445b5b49SHorst Hummel { 3835445b5b49SHorst Hummel int len, count; 3836445b5b49SHorst Hummel char *datap; 3837445b5b49SHorst Hummel 3838445b5b49SHorst Hummel len = 0; 3839445b5b49SHorst Hummel while (from <= to) { 3840445b5b49SHorst Hummel len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3841445b5b49SHorst Hummel " CCW %p: %08X %08X DAT:", 3842445b5b49SHorst Hummel from, ((int *) from)[0], ((int *) from)[1]); 3843445b5b49SHorst Hummel 3844445b5b49SHorst Hummel /* get pointer to data (consider IDALs) */ 3845445b5b49SHorst Hummel if (from->flags & CCW_FLAG_IDA) 3846445b5b49SHorst Hummel datap = (char *) *((addr_t *) (addr_t) from->cda); 3847445b5b49SHorst Hummel else 3848445b5b49SHorst Hummel datap = (char *) ((addr_t) from->cda); 3849445b5b49SHorst Hummel 3850445b5b49SHorst Hummel /* dump data (max 32 bytes) */ 3851445b5b49SHorst Hummel for (count = 0; count < from->count && count < 32; count++) { 3852445b5b49SHorst Hummel if (count % 8 == 0) len += sprintf(page + len, " "); 3853445b5b49SHorst Hummel if (count % 4 == 0) len += sprintf(page + len, " "); 3854445b5b49SHorst Hummel len += sprintf(page + len, "%02x", datap[count]); 3855445b5b49SHorst Hummel } 3856445b5b49SHorst Hummel len += sprintf(page + len, "\n"); 3857445b5b49SHorst Hummel from++; 3858445b5b49SHorst Hummel } 3859445b5b49SHorst Hummel return len; 3860445b5b49SHorst Hummel } 3861445b5b49SHorst Hummel 3862fc19f381SStefan Haberland static void 3863aeec92caSStefan Haberland dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 3864aeec92caSStefan Haberland char *reason) 3865fc19f381SStefan Haberland { 3866fc19f381SStefan Haberland u64 *sense; 3867a5a0061fSStefan Weinhuber u64 *stat; 3868fc19f381SStefan Haberland 3869aeec92caSStefan Haberland sense = (u64 *) dasd_get_sense(irb); 3870a5a0061fSStefan Weinhuber stat = (u64 *) &irb->scsw; 3871fc19f381SStefan Haberland if (sense) { 3872a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " 3873a5a0061fSStefan Weinhuber "%016llx %016llx %016llx %016llx", 3874a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 3875ed3640b2SStefan Haberland sense[0], sense[1], sense[2], sense[3]); 3876fc19f381SStefan Haberland } else { 3877a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", 3878a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 3879a5a0061fSStefan Weinhuber "NO VALID SENSE"); 3880fc19f381SStefan Haberland } 3881fc19f381SStefan Haberland } 3882fc19f381SStefan Haberland 3883445b5b49SHorst Hummel /* 38841da177e4SLinus Torvalds * Print sense data and related channel program. 38851da177e4SLinus Torvalds * Parts are printed because printk buffer is only 1024 bytes. 38861da177e4SLinus Torvalds */ 3887f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 38888e09f215SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 38891da177e4SLinus Torvalds { 38901da177e4SLinus Torvalds char *page; 3891445b5b49SHorst Hummel struct ccw1 *first, *last, *fail, *from, *to; 3892445b5b49SHorst Hummel int len, sl, sct; 38931da177e4SLinus Torvalds 38941da177e4SLinus Torvalds page = (char *) get_zeroed_page(GFP_ATOMIC); 38951da177e4SLinus Torvalds if (page == NULL) { 3896fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3897fc19f381SStefan Haberland "No memory to dump sense data\n"); 38981da177e4SLinus Torvalds return; 38991da177e4SLinus Torvalds } 3900445b5b49SHorst Hummel /* dump the sense data */ 39011da177e4SLinus Torvalds len = sprintf(page, KERN_ERR PRINTK_HEADER 39021da177e4SLinus Torvalds " I/O status report for device %s:\n", 39032a0217d5SKay Sievers dev_name(&device->cdev->dev)); 39041da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3905a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 3906a5a0061fSStefan Weinhuber "CS:%02X RC:%d\n", 3907a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 3908a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 3909a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 3910a5a0061fSStefan Weinhuber req ? req->intrc : 0); 39111da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 39121da177e4SLinus Torvalds " device %s: Failing CCW: %p\n", 39132a0217d5SKay Sievers dev_name(&device->cdev->dev), 391423d805b6SPeter Oberparleiter (void *) (addr_t) irb->scsw.cmd.cpa); 39151da177e4SLinus Torvalds if (irb->esw.esw0.erw.cons) { 39161da177e4SLinus Torvalds for (sl = 0; sl < 4; sl++) { 39171da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 39181da177e4SLinus Torvalds " Sense(hex) %2d-%2d:", 39191da177e4SLinus Torvalds (8 * sl), ((8 * sl) + 7)); 39201da177e4SLinus Torvalds 39211da177e4SLinus Torvalds for (sct = 0; sct < 8; sct++) { 39221da177e4SLinus Torvalds len += sprintf(page + len, " %02x", 39231da177e4SLinus Torvalds irb->ecw[8 * sl + sct]); 39241da177e4SLinus Torvalds } 39251da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 39261da177e4SLinus Torvalds } 39271da177e4SLinus Torvalds 39281da177e4SLinus Torvalds if (irb->ecw[27] & DASD_SENSE_BIT_0) { 39291da177e4SLinus Torvalds /* 24 Byte Sense Data */ 3930445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 39311da177e4SLinus Torvalds " 24 Byte: %x MSG %x, " 39321da177e4SLinus Torvalds "%s MSGb to SYSOP\n", 39331da177e4SLinus Torvalds irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 39341da177e4SLinus Torvalds irb->ecw[1] & 0x10 ? "" : "no"); 39351da177e4SLinus Torvalds } else { 39361da177e4SLinus Torvalds /* 32 Byte Sense Data */ 3937445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 39381da177e4SLinus Torvalds " 32 Byte: Format: %x " 39391da177e4SLinus Torvalds "Exception class %x\n", 39401da177e4SLinus Torvalds irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 39411da177e4SLinus Torvalds } 39421da177e4SLinus Torvalds } else { 3943445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 39441da177e4SLinus Torvalds " SORRY - NO VALID SENSE AVAILABLE\n"); 39451da177e4SLinus Torvalds } 3946445b5b49SHorst Hummel printk("%s", page); 39471da177e4SLinus Torvalds 39488e09f215SStefan Weinhuber if (req) { 39498e09f215SStefan Weinhuber /* req == NULL for unsolicited interrupts */ 3950445b5b49SHorst Hummel /* dump the Channel Program (max 140 Bytes per line) */ 3951445b5b49SHorst Hummel /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 3952445b5b49SHorst Hummel first = req->cpaddr; 3953445b5b49SHorst Hummel for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 3954445b5b49SHorst Hummel to = min(first + 6, last); 39551da177e4SLinus Torvalds len = sprintf(page, KERN_ERR PRINTK_HEADER 39561da177e4SLinus Torvalds " Related CP in req: %p\n", req); 3957445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(first, to, page + len); 3958445b5b49SHorst Hummel printk("%s", page); 39591da177e4SLinus Torvalds 3960445b5b49SHorst Hummel /* print failing CCW area (maximum 4) */ 3961445b5b49SHorst Hummel /* scsw->cda is either valid or zero */ 39621da177e4SLinus Torvalds len = 0; 3963445b5b49SHorst Hummel from = ++to; 396423d805b6SPeter Oberparleiter fail = (struct ccw1 *)(addr_t) 396523d805b6SPeter Oberparleiter irb->scsw.cmd.cpa; /* failing CCW */ 3966445b5b49SHorst Hummel if (from < fail - 2) { 3967445b5b49SHorst Hummel from = fail - 2; /* there is a gap - print header */ 3968445b5b49SHorst Hummel len += sprintf(page, KERN_ERR PRINTK_HEADER "......\n"); 39691da177e4SLinus Torvalds } 3970445b5b49SHorst Hummel to = min(fail + 1, last); 3971445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, to, page + len); 39721da177e4SLinus Torvalds 3973445b5b49SHorst Hummel /* print last CCWs (maximum 2) */ 3974445b5b49SHorst Hummel from = max(from, ++to); 3975445b5b49SHorst Hummel if (from < last - 1) { 3976445b5b49SHorst Hummel from = last - 1; /* there is a gap - print header */ 39771da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n"); 39781da177e4SLinus Torvalds } 3979445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, last, page + len); 39801da177e4SLinus Torvalds if (len > 0) 3981445b5b49SHorst Hummel printk("%s", page); 39828e09f215SStefan Weinhuber } 39831da177e4SLinus Torvalds free_page((unsigned long) page); 39841da177e4SLinus Torvalds } 39851da177e4SLinus Torvalds 3986f3eb5384SStefan Weinhuber 3987f3eb5384SStefan Weinhuber /* 3988f3eb5384SStefan Weinhuber * Print sense data from a tcw. 3989f3eb5384SStefan Weinhuber */ 3990f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 3991f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 3992f3eb5384SStefan Weinhuber { 3993f3eb5384SStefan Weinhuber char *page; 3994f3eb5384SStefan Weinhuber int len, sl, sct, residual; 3995f3eb5384SStefan Weinhuber struct tsb *tsb; 3996ef19298bSStefan Weinhuber u8 *sense, *rcq; 3997f3eb5384SStefan Weinhuber 3998f3eb5384SStefan Weinhuber page = (char *) get_zeroed_page(GFP_ATOMIC); 3999f3eb5384SStefan Weinhuber if (page == NULL) { 4000fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, " %s", 4001f3eb5384SStefan Weinhuber "No memory to dump sense data"); 4002f3eb5384SStefan Weinhuber return; 4003f3eb5384SStefan Weinhuber } 4004f3eb5384SStefan Weinhuber /* dump the sense data */ 4005f3eb5384SStefan Weinhuber len = sprintf(page, KERN_ERR PRINTK_HEADER 4006f3eb5384SStefan Weinhuber " I/O status report for device %s:\n", 4007f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev)); 4008f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4009a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 4010a5a0061fSStefan Weinhuber "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", 4011a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 4012a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 4013a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 4014a5a0061fSStefan Weinhuber irb->scsw.tm.fcxs, irb->scsw.tm.schxs, 4015a5a0061fSStefan Weinhuber req ? req->intrc : 0); 4016f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4017f3eb5384SStefan Weinhuber " device %s: Failing TCW: %p\n", 4018f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev), 4019f3eb5384SStefan Weinhuber (void *) (addr_t) irb->scsw.tm.tcw); 4020f3eb5384SStefan Weinhuber 4021f3eb5384SStefan Weinhuber tsb = NULL; 4022f3eb5384SStefan Weinhuber sense = NULL; 4023a5a0061fSStefan Weinhuber if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) 4024f3eb5384SStefan Weinhuber tsb = tcw_get_tsb( 4025f3eb5384SStefan Weinhuber (struct tcw *)(unsigned long)irb->scsw.tm.tcw); 4026f3eb5384SStefan Weinhuber 4027b8fde722SStefan Haberland if (tsb) { 4028f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4029f3eb5384SStefan Weinhuber " tsb->length %d\n", tsb->length); 4030f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4031f3eb5384SStefan Weinhuber " tsb->flags %x\n", tsb->flags); 4032f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4033f3eb5384SStefan Weinhuber " tsb->dcw_offset %d\n", tsb->dcw_offset); 4034f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4035f3eb5384SStefan Weinhuber " tsb->count %d\n", tsb->count); 4036f3eb5384SStefan Weinhuber residual = tsb->count - 28; 4037f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4038f3eb5384SStefan Weinhuber " residual %d\n", residual); 4039f3eb5384SStefan Weinhuber 4040f3eb5384SStefan Weinhuber switch (tsb->flags & 0x07) { 4041f3eb5384SStefan Weinhuber case 1: /* tsa_iostat */ 4042f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4043f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_time %d\n", 4044f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_time); 4045f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4046f3eb5384SStefan Weinhuber " tsb->tsa.iostat.def_time %d\n", 4047f3eb5384SStefan Weinhuber tsb->tsa.iostat.def_time); 4048f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4049f3eb5384SStefan Weinhuber " tsb->tsa.iostat.queue_time %d\n", 4050f3eb5384SStefan Weinhuber tsb->tsa.iostat.queue_time); 4051f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4052f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_busy_time %d\n", 4053f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_busy_time); 4054f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4055f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_act_time %d\n", 4056f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_act_time); 4057f3eb5384SStefan Weinhuber sense = tsb->tsa.iostat.sense; 4058f3eb5384SStefan Weinhuber break; 4059f3eb5384SStefan Weinhuber case 2: /* ts_ddpc */ 4060f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4061f3eb5384SStefan Weinhuber " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); 4062ef19298bSStefan Weinhuber for (sl = 0; sl < 2; sl++) { 4063ef19298bSStefan Weinhuber len += sprintf(page + len, 4064ef19298bSStefan Weinhuber KERN_ERR PRINTK_HEADER 4065ef19298bSStefan Weinhuber " tsb->tsa.ddpc.rcq %2d-%2d: ", 4066ef19298bSStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 4067ef19298bSStefan Weinhuber rcq = tsb->tsa.ddpc.rcq; 4068f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 4069f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 4070ef19298bSStefan Weinhuber rcq[8 * sl + sct]); 4071f3eb5384SStefan Weinhuber } 4072f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 4073f3eb5384SStefan Weinhuber } 4074f3eb5384SStefan Weinhuber sense = tsb->tsa.ddpc.sense; 4075f3eb5384SStefan Weinhuber break; 4076f3eb5384SStefan Weinhuber case 3: /* tsa_intrg */ 4077f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4078f3eb5384SStefan Weinhuber " tsb->tsa.intrg.: not supportet yet \n"); 4079f3eb5384SStefan Weinhuber break; 4080f3eb5384SStefan Weinhuber } 4081f3eb5384SStefan Weinhuber 4082f3eb5384SStefan Weinhuber if (sense) { 4083f3eb5384SStefan Weinhuber for (sl = 0; sl < 4; sl++) { 4084f3eb5384SStefan Weinhuber len += sprintf(page + len, 4085f3eb5384SStefan Weinhuber KERN_ERR PRINTK_HEADER 4086f3eb5384SStefan Weinhuber " Sense(hex) %2d-%2d:", 4087f3eb5384SStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 4088f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 4089f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 4090f3eb5384SStefan Weinhuber sense[8 * sl + sct]); 4091f3eb5384SStefan Weinhuber } 4092f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 4093f3eb5384SStefan Weinhuber } 4094f3eb5384SStefan Weinhuber 4095f3eb5384SStefan Weinhuber if (sense[27] & DASD_SENSE_BIT_0) { 4096f3eb5384SStefan Weinhuber /* 24 Byte Sense Data */ 4097f3eb5384SStefan Weinhuber sprintf(page + len, KERN_ERR PRINTK_HEADER 4098f3eb5384SStefan Weinhuber " 24 Byte: %x MSG %x, " 4099f3eb5384SStefan Weinhuber "%s MSGb to SYSOP\n", 4100f3eb5384SStefan Weinhuber sense[7] >> 4, sense[7] & 0x0f, 4101f3eb5384SStefan Weinhuber sense[1] & 0x10 ? "" : "no"); 4102f3eb5384SStefan Weinhuber } else { 4103f3eb5384SStefan Weinhuber /* 32 Byte Sense Data */ 4104f3eb5384SStefan Weinhuber sprintf(page + len, KERN_ERR PRINTK_HEADER 4105f3eb5384SStefan Weinhuber " 32 Byte: Format: %x " 4106f3eb5384SStefan Weinhuber "Exception class %x\n", 4107f3eb5384SStefan Weinhuber sense[6] & 0x0f, sense[22] >> 4); 4108f3eb5384SStefan Weinhuber } 4109f3eb5384SStefan Weinhuber } else { 4110f3eb5384SStefan Weinhuber sprintf(page + len, KERN_ERR PRINTK_HEADER 4111f3eb5384SStefan Weinhuber " SORRY - NO VALID SENSE AVAILABLE\n"); 4112f3eb5384SStefan Weinhuber } 4113f3eb5384SStefan Weinhuber } else { 4114f3eb5384SStefan Weinhuber sprintf(page + len, KERN_ERR PRINTK_HEADER 4115f3eb5384SStefan Weinhuber " SORRY - NO TSB DATA AVAILABLE\n"); 4116f3eb5384SStefan Weinhuber } 4117f3eb5384SStefan Weinhuber printk("%s", page); 4118f3eb5384SStefan Weinhuber free_page((unsigned long) page); 4119f3eb5384SStefan Weinhuber } 4120f3eb5384SStefan Weinhuber 4121f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense(struct dasd_device *device, 4122f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 4123f3eb5384SStefan Weinhuber { 4124a5a0061fSStefan Weinhuber if (scsw_is_tm(&irb->scsw)) 4125f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_tcw(device, req, irb); 4126f3eb5384SStefan Weinhuber else 4127f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_ccw(device, req, irb); 4128f3eb5384SStefan Weinhuber } 4129f3eb5384SStefan Weinhuber 4130501183f2SStefan Haberland static int dasd_eckd_pm_freeze(struct dasd_device *device) 4131d41dd122SStefan Haberland { 4132d41dd122SStefan Haberland /* 4133d41dd122SStefan Haberland * the device should be disconnected from our LCU structure 4134d41dd122SStefan Haberland * on restore we will reconnect it and reread LCU specific 4135d41dd122SStefan Haberland * information like PAV support that might have changed 4136d41dd122SStefan Haberland */ 4137d41dd122SStefan Haberland dasd_alias_remove_device(device); 4138d41dd122SStefan Haberland dasd_alias_disconnect_device_from_lcu(device); 4139d41dd122SStefan Haberland 4140d41dd122SStefan Haberland return 0; 4141d41dd122SStefan Haberland } 4142d41dd122SStefan Haberland 4143501183f2SStefan Haberland static int dasd_eckd_restore_device(struct dasd_device *device) 4144d41dd122SStefan Haberland { 4145d41dd122SStefan Haberland struct dasd_eckd_private *private; 41466fca97a9SStefan Haberland struct dasd_eckd_characteristics temp_rdc_data; 4147f9f8d02fSStefan Haberland int rc; 4148d41dd122SStefan Haberland struct dasd_uid temp_uid; 4149a7602f6cSStefan Haberland unsigned long flags; 4150d41dd122SStefan Haberland 4151d41dd122SStefan Haberland private = (struct dasd_eckd_private *) device->private; 4152d41dd122SStefan Haberland 4153d41dd122SStefan Haberland /* Read Configuration Data */ 4154d41dd122SStefan Haberland rc = dasd_eckd_read_conf(device); 4155d41dd122SStefan Haberland if (rc) 4156d41dd122SStefan Haberland goto out_err; 4157d41dd122SStefan Haberland 41582dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 41592dedf0d9SStefan Haberland /* Generate device unique id */ 41602dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 41612dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4162d41dd122SStefan Haberland if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) 4163a7602f6cSStefan Haberland dev_err(&device->cdev->dev, "The UID of the DASD has " 4164a7602f6cSStefan Haberland "changed\n"); 41652dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4166d41dd122SStefan Haberland if (rc) 4167d41dd122SStefan Haberland goto out_err; 4168d41dd122SStefan Haberland 4169d41dd122SStefan Haberland /* register lcu with alias handling, enable PAV if this is a new lcu */ 4170f9f8d02fSStefan Haberland rc = dasd_alias_make_device_known_to_lcu(device); 4171f9f8d02fSStefan Haberland if (rc) 4172f9f8d02fSStefan Haberland return rc; 417312d7b107SStefan Haberland dasd_eckd_validate_server(device, DASD_CQR_FLAGS_FAILFAST); 4174f4ac1d02SStefan Weinhuber 4175f4ac1d02SStefan Weinhuber /* RE-Read Configuration Data */ 4176f4ac1d02SStefan Weinhuber rc = dasd_eckd_read_conf(device); 4177d41dd122SStefan Haberland if (rc) 4178d41dd122SStefan Haberland goto out_err; 4179d41dd122SStefan Haberland 4180d41dd122SStefan Haberland /* Read Feature Codes */ 418168d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 4182d41dd122SStefan Haberland 4183d41dd122SStefan Haberland /* Read Device Characteristics */ 418468b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 41856fca97a9SStefan Haberland &temp_rdc_data, 64); 4186d41dd122SStefan Haberland if (rc) { 4187b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 4188b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 4189d41dd122SStefan Haberland goto out_err; 4190d41dd122SStefan Haberland } 4191a7602f6cSStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 41926fca97a9SStefan Haberland memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data)); 4193a7602f6cSStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4194d41dd122SStefan Haberland 4195d41dd122SStefan Haberland /* add device to alias management */ 4196d41dd122SStefan Haberland dasd_alias_add_device(device); 4197d41dd122SStefan Haberland 4198d41dd122SStefan Haberland return 0; 4199d41dd122SStefan Haberland 4200d41dd122SStefan Haberland out_err: 4201e6125fbaSStefan Haberland return -1; 4202d41dd122SStefan Haberland } 4203d41dd122SStefan Haberland 4204501183f2SStefan Haberland static int dasd_eckd_reload_device(struct dasd_device *device) 4205501183f2SStefan Haberland { 4206501183f2SStefan Haberland struct dasd_eckd_private *private; 4207501183f2SStefan Haberland int rc, old_base; 42082dedf0d9SStefan Haberland char print_uid[60]; 42092dedf0d9SStefan Haberland struct dasd_uid uid; 42102dedf0d9SStefan Haberland unsigned long flags; 4211501183f2SStefan Haberland 4212501183f2SStefan Haberland private = (struct dasd_eckd_private *) device->private; 42132dedf0d9SStefan Haberland 42142dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4215501183f2SStefan Haberland old_base = private->uid.base_unit_addr; 42162dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 42172dedf0d9SStefan Haberland 4218501183f2SStefan Haberland /* Read Configuration Data */ 4219501183f2SStefan Haberland rc = dasd_eckd_read_conf(device); 4220501183f2SStefan Haberland if (rc) 4221501183f2SStefan Haberland goto out_err; 4222501183f2SStefan Haberland 42232dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 4224501183f2SStefan Haberland if (rc) 4225501183f2SStefan Haberland goto out_err; 4226501183f2SStefan Haberland /* 4227501183f2SStefan Haberland * update unit address configuration and 4228501183f2SStefan Haberland * add device to alias management 4229501183f2SStefan Haberland */ 4230501183f2SStefan Haberland dasd_alias_update_add_device(device); 4231501183f2SStefan Haberland 42322dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &uid); 42332dedf0d9SStefan Haberland 42342dedf0d9SStefan Haberland if (old_base != uid.base_unit_addr) { 42352dedf0d9SStefan Haberland if (strlen(uid.vduit) > 0) 42362dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 42372dedf0d9SStefan Haberland "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial, 42382dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr, uid.vduit); 4239501183f2SStefan Haberland else 42402dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 42412dedf0d9SStefan Haberland "%s.%s.%04x.%02x", uid.vendor, uid.serial, 42422dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr); 4243501183f2SStefan Haberland 4244501183f2SStefan Haberland dev_info(&device->cdev->dev, 4245501183f2SStefan Haberland "An Alias device was reassigned to a new base device " 42462dedf0d9SStefan Haberland "with UID: %s\n", print_uid); 4247501183f2SStefan Haberland } 4248501183f2SStefan Haberland return 0; 4249501183f2SStefan Haberland 4250501183f2SStefan Haberland out_err: 4251501183f2SStefan Haberland return -1; 4252501183f2SStefan Haberland } 4253501183f2SStefan Haberland 4254d41dd122SStefan Haberland static struct ccw_driver dasd_eckd_driver = { 42553bda058bSSebastian Ott .driver = { 4256d41dd122SStefan Haberland .name = "dasd-eckd", 4257d41dd122SStefan Haberland .owner = THIS_MODULE, 42583bda058bSSebastian Ott }, 4259d41dd122SStefan Haberland .ids = dasd_eckd_ids, 4260d41dd122SStefan Haberland .probe = dasd_eckd_probe, 4261d41dd122SStefan Haberland .remove = dasd_generic_remove, 4262d41dd122SStefan Haberland .set_offline = dasd_generic_set_offline, 4263d41dd122SStefan Haberland .set_online = dasd_eckd_set_online, 4264d41dd122SStefan Haberland .notify = dasd_generic_notify, 4265a4d26c6aSStefan Weinhuber .path_event = dasd_generic_path_event, 42664679e893SStefan Haberland .shutdown = dasd_generic_shutdown, 4267d41dd122SStefan Haberland .freeze = dasd_generic_pm_freeze, 4268d41dd122SStefan Haberland .thaw = dasd_generic_restore_device, 4269d41dd122SStefan Haberland .restore = dasd_generic_restore_device, 4270a23ed009SStefan Haberland .uc_handler = dasd_generic_uc_handler, 4271de400d6bSPeter Oberparleiter .int_class = IOINT_DAS, 4272d41dd122SStefan Haberland }; 4273f3eb5384SStefan Weinhuber 42741da177e4SLinus Torvalds /* 42751da177e4SLinus Torvalds * max_blocks is dependent on the amount of storage that is available 42761da177e4SLinus Torvalds * in the static io buffer for each device. Currently each device has 42771da177e4SLinus Torvalds * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has 42781da177e4SLinus Torvalds * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use 42791da177e4SLinus Torvalds * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In 42801da177e4SLinus Torvalds * addition we have one define extent ccw + 16 bytes of data and one 42811da177e4SLinus Torvalds * locate record ccw + 16 bytes of data. That makes: 42821da177e4SLinus Torvalds * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. 42831da177e4SLinus Torvalds * We want to fit two into the available memory so that we can immediately 42841da177e4SLinus Torvalds * start the next request if one finishes off. That makes 249.5 blocks 42851da177e4SLinus Torvalds * for one request. Give a little safety and the result is 240. 42861da177e4SLinus Torvalds */ 42871da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline = { 42881da177e4SLinus Torvalds .owner = THIS_MODULE, 42891da177e4SLinus Torvalds .name = "ECKD", 42901da177e4SLinus Torvalds .ebcname = "ECKD", 4291ef19298bSStefan Weinhuber .max_blocks = 190, 42921da177e4SLinus Torvalds .check_device = dasd_eckd_check_characteristics, 42938e09f215SStefan Weinhuber .uncheck_device = dasd_eckd_uncheck_device, 42941da177e4SLinus Torvalds .do_analysis = dasd_eckd_do_analysis, 4295a4d26c6aSStefan Weinhuber .verify_path = dasd_eckd_verify_path, 42968e09f215SStefan Weinhuber .ready_to_online = dasd_eckd_ready_to_online, 42978e09f215SStefan Weinhuber .online_to_ready = dasd_eckd_online_to_ready, 42981da177e4SLinus Torvalds .fill_geometry = dasd_eckd_fill_geometry, 42991da177e4SLinus Torvalds .start_IO = dasd_start_IO, 43001da177e4SLinus Torvalds .term_IO = dasd_term_IO, 43018e09f215SStefan Weinhuber .handle_terminated_request = dasd_eckd_handle_terminated_request, 43021da177e4SLinus Torvalds .format_device = dasd_eckd_format_device, 43031da177e4SLinus Torvalds .erp_action = dasd_eckd_erp_action, 43041da177e4SLinus Torvalds .erp_postaction = dasd_eckd_erp_postaction, 43055a27e60dSStefan Weinhuber .check_for_device_change = dasd_eckd_check_for_device_change, 43068e09f215SStefan Weinhuber .build_cp = dasd_eckd_build_alias_cp, 43078e09f215SStefan Weinhuber .free_cp = dasd_eckd_free_alias_cp, 43081da177e4SLinus Torvalds .dump_sense = dasd_eckd_dump_sense, 4309fc19f381SStefan Haberland .dump_sense_dbf = dasd_eckd_dump_sense_dbf, 43101da177e4SLinus Torvalds .fill_info = dasd_eckd_fill_info, 43111107ccfbSChristoph Hellwig .ioctl = dasd_eckd_ioctl, 4312d41dd122SStefan Haberland .freeze = dasd_eckd_pm_freeze, 4313d41dd122SStefan Haberland .restore = dasd_eckd_restore_device, 4314501183f2SStefan Haberland .reload = dasd_eckd_reload_device, 43152dedf0d9SStefan Haberland .get_uid = dasd_eckd_get_uid, 4316f1633031SStefan Haberland .kick_validate = dasd_eckd_kick_validate_server, 43171da177e4SLinus Torvalds }; 43181da177e4SLinus Torvalds 43191da177e4SLinus Torvalds static int __init 43201da177e4SLinus Torvalds dasd_eckd_init(void) 43211da177e4SLinus Torvalds { 4322736e6ea0SSebastian Ott int ret; 4323736e6ea0SSebastian Ott 43241da177e4SLinus Torvalds ASCEBC(dasd_eckd_discipline.ebcname, 4); 4325f932bceaSStefan Weinhuber dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), 4326f932bceaSStefan Weinhuber GFP_KERNEL | GFP_DMA); 4327f932bceaSStefan Weinhuber if (!dasd_reserve_req) 4328f932bceaSStefan Weinhuber return -ENOMEM; 4329a4d26c6aSStefan Weinhuber path_verification_worker = kmalloc(sizeof(*path_verification_worker), 4330a4d26c6aSStefan Weinhuber GFP_KERNEL | GFP_DMA); 4331a4d26c6aSStefan Weinhuber if (!path_verification_worker) { 4332a4d26c6aSStefan Weinhuber kfree(dasd_reserve_req); 4333a4d26c6aSStefan Weinhuber return -ENOMEM; 4334a4d26c6aSStefan Weinhuber } 4335736e6ea0SSebastian Ott ret = ccw_driver_register(&dasd_eckd_driver); 4336736e6ea0SSebastian Ott if (!ret) 4337736e6ea0SSebastian Ott wait_for_device_probe(); 4338a4d26c6aSStefan Weinhuber else { 4339a4d26c6aSStefan Weinhuber kfree(path_verification_worker); 4340f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 4341a4d26c6aSStefan Weinhuber } 4342736e6ea0SSebastian Ott return ret; 43431da177e4SLinus Torvalds } 43441da177e4SLinus Torvalds 43451da177e4SLinus Torvalds static void __exit 43461da177e4SLinus Torvalds dasd_eckd_cleanup(void) 43471da177e4SLinus Torvalds { 43481da177e4SLinus Torvalds ccw_driver_unregister(&dasd_eckd_driver); 4349a4d26c6aSStefan Weinhuber kfree(path_verification_worker); 4350f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 43511da177e4SLinus Torvalds } 43521da177e4SLinus Torvalds 43531da177e4SLinus Torvalds module_init(dasd_eckd_init); 43541da177e4SLinus Torvalds module_exit(dasd_eckd_cleanup); 4355