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 1423bc9fef9SStefan Haberland /* head and record addresses of count_area read in analysis ccw */ 1433bc9fef9SStefan Haberland static const int count_area_head[] = { 0, 0, 0, 0, 2 }; 1443bc9fef9SStefan Haberland static const int count_area_rec[] = { 1, 2, 3, 4, 1 }; 1453bc9fef9SStefan Haberland 1461da177e4SLinus Torvalds static inline unsigned int 1471da177e4SLinus Torvalds round_up_multiple(unsigned int no, unsigned int mult) 1481da177e4SLinus Torvalds { 1491da177e4SLinus Torvalds int rem = no % mult; 1501da177e4SLinus Torvalds return (rem ? no - rem + mult : no); 1511da177e4SLinus Torvalds } 1521da177e4SLinus Torvalds 1531da177e4SLinus Torvalds static inline unsigned int 1541da177e4SLinus Torvalds ceil_quot(unsigned int d1, unsigned int d2) 1551da177e4SLinus Torvalds { 1561da177e4SLinus Torvalds return (d1 + (d2 - 1)) / d2; 1571da177e4SLinus Torvalds } 1581da177e4SLinus Torvalds 1594d284cacSHeiko Carstens static unsigned int 1601da177e4SLinus Torvalds recs_per_track(struct dasd_eckd_characteristics * rdc, 1611da177e4SLinus Torvalds unsigned int kl, unsigned int dl) 1621da177e4SLinus Torvalds { 1631da177e4SLinus Torvalds int dn, kn; 1641da177e4SLinus Torvalds 1651da177e4SLinus Torvalds switch (rdc->dev_type) { 1661da177e4SLinus Torvalds case 0x3380: 1671da177e4SLinus Torvalds if (kl) 1681da177e4SLinus Torvalds return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + 1691da177e4SLinus Torvalds ceil_quot(dl + 12, 32)); 1701da177e4SLinus Torvalds else 1711da177e4SLinus Torvalds return 1499 / (15 + ceil_quot(dl + 12, 32)); 1721da177e4SLinus Torvalds case 0x3390: 1731da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1741da177e4SLinus Torvalds if (kl) { 1751da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1761da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + 1771da177e4SLinus Torvalds 9 + ceil_quot(dl + 6 * dn, 34)); 1781da177e4SLinus Torvalds } else 1791da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); 1801da177e4SLinus Torvalds case 0x9345: 1811da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1821da177e4SLinus Torvalds if (kl) { 1831da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1841da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + 1851da177e4SLinus Torvalds ceil_quot(dl + 6 * dn, 34)); 1861da177e4SLinus Torvalds } else 1871da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); 1881da177e4SLinus Torvalds } 1891da177e4SLinus Torvalds return 0; 1901da177e4SLinus Torvalds } 1911da177e4SLinus Torvalds 192b44b0ab3SStefan Weinhuber static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head) 193b44b0ab3SStefan Weinhuber { 194b44b0ab3SStefan Weinhuber geo->cyl = (__u16) cyl; 195b44b0ab3SStefan Weinhuber geo->head = cyl >> 16; 196b44b0ab3SStefan Weinhuber geo->head <<= 4; 197b44b0ab3SStefan Weinhuber geo->head |= head; 198b44b0ab3SStefan Weinhuber } 199b44b0ab3SStefan Weinhuber 2004d284cacSHeiko Carstens static int 2011da177e4SLinus Torvalds check_XRC (struct ccw1 *de_ccw, 2021da177e4SLinus Torvalds struct DE_eckd_data *data, 2031da177e4SLinus Torvalds struct dasd_device *device) 2041da177e4SLinus Torvalds { 2051da177e4SLinus Torvalds struct dasd_eckd_private *private; 206d54853efSMartin Schwidefsky int rc; 2071da177e4SLinus Torvalds 2081da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 209d54853efSMartin Schwidefsky if (!private->rdc_data.facilities.XRC_supported) 210d54853efSMartin Schwidefsky return 0; 2111da177e4SLinus Torvalds 2121da177e4SLinus Torvalds /* switch on System Time Stamp - needed for XRC Support */ 2131da177e4SLinus Torvalds data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ 2141da177e4SLinus Torvalds data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ 2151da177e4SLinus Torvalds 216d54853efSMartin Schwidefsky rc = get_sync_clock(&data->ep_sys_time); 217d54853efSMartin Schwidefsky /* Ignore return code if sync clock is switched off. */ 218a8f6db4dSHeiko Carstens if (rc == -EOPNOTSUPP || rc == -EACCES) 219d54853efSMartin Schwidefsky rc = 0; 2201da177e4SLinus Torvalds 2211da177e4SLinus Torvalds de_ccw->count = sizeof(struct DE_eckd_data); 2221da177e4SLinus Torvalds de_ccw->flags |= CCW_FLAG_SLI; 223d54853efSMartin Schwidefsky return rc; 2241da177e4SLinus Torvalds } 2251da177e4SLinus Torvalds 2264d284cacSHeiko Carstens static int 227b44b0ab3SStefan Weinhuber define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk, 228b44b0ab3SStefan Weinhuber unsigned int totrk, int cmd, struct dasd_device *device) 2291da177e4SLinus Torvalds { 2301da177e4SLinus Torvalds struct dasd_eckd_private *private; 231b44b0ab3SStefan Weinhuber u32 begcyl, endcyl; 232b44b0ab3SStefan Weinhuber u16 heads, beghead, endhead; 233d54853efSMartin Schwidefsky int rc = 0; 2341da177e4SLinus Torvalds 2351da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 2361da177e4SLinus Torvalds 2371da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; 2381da177e4SLinus Torvalds ccw->flags = 0; 2391da177e4SLinus Torvalds ccw->count = 16; 2401da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 2411da177e4SLinus Torvalds 2421da177e4SLinus Torvalds memset(data, 0, sizeof(struct DE_eckd_data)); 2431da177e4SLinus Torvalds switch (cmd) { 2441da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 2451da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 2461da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 2471da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 2481da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 2491da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 2501da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 2511da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 2521da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_COUNT: 2531da177e4SLinus Torvalds data->mask.perm = 0x1; 2541da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 2551da177e4SLinus Torvalds break; 2561da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 2571da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 2581da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 2591da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 2601da177e4SLinus Torvalds data->mask.perm = 0x02; 2611da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 262d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2631da177e4SLinus Torvalds break; 2641da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 2651da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 2661da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 267d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2681da177e4SLinus Torvalds break; 2691da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 2701da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 2711da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 2721da177e4SLinus Torvalds data->mask.perm = 0x3; 2731da177e4SLinus Torvalds data->mask.auth = 0x1; 2741da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 275d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2761da177e4SLinus Torvalds break; 2771da177e4SLinus Torvalds default: 278fc19f381SStefan Haberland dev_err(&device->cdev->dev, 279fc19f381SStefan Haberland "0x%x is not a known command\n", cmd); 2801da177e4SLinus Torvalds break; 2811da177e4SLinus Torvalds } 2821da177e4SLinus Torvalds 2831da177e4SLinus Torvalds data->attributes.mode = 0x3; /* ECKD */ 2841da177e4SLinus Torvalds 2851da177e4SLinus Torvalds if ((private->rdc_data.cu_type == 0x2105 || 2861da177e4SLinus Torvalds private->rdc_data.cu_type == 0x2107 || 2871da177e4SLinus Torvalds private->rdc_data.cu_type == 0x1750) 2881da177e4SLinus Torvalds && !(private->uses_cdl && trk < 2)) 2891da177e4SLinus Torvalds data->ga_extended |= 0x40; /* Regular Data Format Mode */ 2901da177e4SLinus Torvalds 291b44b0ab3SStefan Weinhuber heads = private->rdc_data.trk_per_cyl; 292b44b0ab3SStefan Weinhuber begcyl = trk / heads; 293b44b0ab3SStefan Weinhuber beghead = trk % heads; 294b44b0ab3SStefan Weinhuber endcyl = totrk / heads; 295b44b0ab3SStefan Weinhuber endhead = totrk % heads; 2961da177e4SLinus Torvalds 2971da177e4SLinus Torvalds /* check for sequential prestage - enhance cylinder range */ 2981da177e4SLinus Torvalds if (data->attributes.operation == DASD_SEQ_PRESTAGE || 2991da177e4SLinus Torvalds data->attributes.operation == DASD_SEQ_ACCESS) { 3001da177e4SLinus Torvalds 301b44b0ab3SStefan Weinhuber if (endcyl + private->attrib.nr_cyl < private->real_cyl) 302b44b0ab3SStefan Weinhuber endcyl += private->attrib.nr_cyl; 3031da177e4SLinus Torvalds else 304b44b0ab3SStefan Weinhuber endcyl = (private->real_cyl - 1); 3051da177e4SLinus Torvalds } 3061da177e4SLinus Torvalds 307b44b0ab3SStefan Weinhuber set_ch_t(&data->beg_ext, begcyl, beghead); 308b44b0ab3SStefan Weinhuber set_ch_t(&data->end_ext, endcyl, endhead); 309d54853efSMartin Schwidefsky return rc; 3101da177e4SLinus Torvalds } 3111da177e4SLinus Torvalds 3128e09f215SStefan Weinhuber static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata, 3138e09f215SStefan Weinhuber struct dasd_device *device) 3148e09f215SStefan Weinhuber { 3158e09f215SStefan Weinhuber struct dasd_eckd_private *private; 3168e09f215SStefan Weinhuber int rc; 3178e09f215SStefan Weinhuber 3188e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 3198e09f215SStefan Weinhuber if (!private->rdc_data.facilities.XRC_supported) 3208e09f215SStefan Weinhuber return 0; 3218e09f215SStefan Weinhuber 3228e09f215SStefan Weinhuber /* switch on System Time Stamp - needed for XRC Support */ 323f3eb5384SStefan Weinhuber pfxdata->define_extent.ga_extended |= 0x08; /* 'Time Stamp Valid' */ 324f3eb5384SStefan Weinhuber pfxdata->define_extent.ga_extended |= 0x02; /* 'Extended Parameter' */ 3258e09f215SStefan Weinhuber pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */ 3268e09f215SStefan Weinhuber 327f3eb5384SStefan Weinhuber rc = get_sync_clock(&pfxdata->define_extent.ep_sys_time); 3288e09f215SStefan Weinhuber /* Ignore return code if sync clock is switched off. */ 329a8f6db4dSHeiko Carstens if (rc == -EOPNOTSUPP || rc == -EACCES) 3308e09f215SStefan Weinhuber rc = 0; 3318e09f215SStefan Weinhuber return rc; 3328e09f215SStefan Weinhuber } 3338e09f215SStefan Weinhuber 334f3eb5384SStefan Weinhuber static void fill_LRE_data(struct LRE_eckd_data *data, unsigned int trk, 335f3eb5384SStefan Weinhuber unsigned int rec_on_trk, int count, int cmd, 336f3eb5384SStefan Weinhuber struct dasd_device *device, unsigned int reclen, 337f3eb5384SStefan Weinhuber unsigned int tlf) 338f3eb5384SStefan Weinhuber { 339f3eb5384SStefan Weinhuber struct dasd_eckd_private *private; 340f3eb5384SStefan Weinhuber int sector; 341f3eb5384SStefan Weinhuber int dn, d; 342f3eb5384SStefan Weinhuber 343f3eb5384SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 344f3eb5384SStefan Weinhuber 345f3eb5384SStefan Weinhuber memset(data, 0, sizeof(*data)); 346f3eb5384SStefan Weinhuber sector = 0; 347f3eb5384SStefan Weinhuber if (rec_on_trk) { 348f3eb5384SStefan Weinhuber switch (private->rdc_data.dev_type) { 349f3eb5384SStefan Weinhuber case 0x3390: 350f3eb5384SStefan Weinhuber dn = ceil_quot(reclen + 6, 232); 351f3eb5384SStefan Weinhuber d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 352f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 353f3eb5384SStefan Weinhuber break; 354f3eb5384SStefan Weinhuber case 0x3380: 355f3eb5384SStefan Weinhuber d = 7 + ceil_quot(reclen + 12, 32); 356f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 357f3eb5384SStefan Weinhuber break; 358f3eb5384SStefan Weinhuber } 359f3eb5384SStefan Weinhuber } 360f3eb5384SStefan Weinhuber data->sector = sector; 361f3eb5384SStefan Weinhuber /* note: meaning of count depends on the operation 362f3eb5384SStefan Weinhuber * for record based I/O it's the number of records, but for 363f3eb5384SStefan Weinhuber * track based I/O it's the number of tracks 364f3eb5384SStefan Weinhuber */ 365f3eb5384SStefan Weinhuber data->count = count; 366f3eb5384SStefan Weinhuber switch (cmd) { 367f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 368f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 369f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 370f3eb5384SStefan Weinhuber break; 371f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_HOME_ADDRESS: 372f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 373f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 374f3eb5384SStefan Weinhuber break; 375f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 376f3eb5384SStefan Weinhuber data->operation.orientation = 0x1; 377f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 378f3eb5384SStefan Weinhuber data->count++; 379f3eb5384SStefan Weinhuber break; 380f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_RECORD_ZERO: 381f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 382f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 383f3eb5384SStefan Weinhuber data->count++; 384f3eb5384SStefan Weinhuber break; 385f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE: 386f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_MT: 387f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD: 388f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD_MT: 389f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 390f3eb5384SStefan Weinhuber data->length = reclen; 391f3eb5384SStefan Weinhuber data->operation.operation = 0x01; 392f3eb5384SStefan Weinhuber break; 393f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD: 394f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD_MT: 395f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 396f3eb5384SStefan Weinhuber data->length = reclen; 397f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 398f3eb5384SStefan Weinhuber break; 399e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_WRITE_FULL_TRACK: 400e4dbb0f2SStefan Haberland data->operation.orientation = 0x0; 401e4dbb0f2SStefan Haberland data->operation.operation = 0x3F; 402e4dbb0f2SStefan Haberland data->extended_operation = 0x11; 403e4dbb0f2SStefan Haberland data->length = 0; 404e4dbb0f2SStefan Haberland data->extended_parameter_length = 0x02; 405e4dbb0f2SStefan Haberland if (data->count > 8) { 406e4dbb0f2SStefan Haberland data->extended_parameter[0] = 0xFF; 407e4dbb0f2SStefan Haberland data->extended_parameter[1] = 0xFF; 408e4dbb0f2SStefan Haberland data->extended_parameter[1] <<= (16 - count); 409e4dbb0f2SStefan Haberland } else { 410e4dbb0f2SStefan Haberland data->extended_parameter[0] = 0xFF; 411e4dbb0f2SStefan Haberland data->extended_parameter[0] <<= (8 - count); 412e4dbb0f2SStefan Haberland data->extended_parameter[1] = 0x00; 413e4dbb0f2SStefan Haberland } 414e4dbb0f2SStefan Haberland data->sector = 0xFF; 415e4dbb0f2SStefan Haberland break; 416f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 417f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 418f3eb5384SStefan Weinhuber data->length = reclen; /* not tlf, as one might think */ 419f3eb5384SStefan Weinhuber data->operation.operation = 0x3F; 420f3eb5384SStefan Weinhuber data->extended_operation = 0x23; 421f3eb5384SStefan Weinhuber break; 422f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ: 423f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_MT: 424f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_KD: 425f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_KD_MT: 426f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 427f3eb5384SStefan Weinhuber data->length = reclen; 428f3eb5384SStefan Weinhuber data->operation.operation = 0x06; 429f3eb5384SStefan Weinhuber break; 430f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD: 431f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD_MT: 432f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 433f3eb5384SStefan Weinhuber data->length = reclen; 434f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 435f3eb5384SStefan Weinhuber break; 436f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_COUNT: 437f3eb5384SStefan Weinhuber data->operation.operation = 0x06; 438f3eb5384SStefan Weinhuber break; 439e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_READ_TRACK: 440e4dbb0f2SStefan Haberland data->operation.orientation = 0x1; 441e4dbb0f2SStefan Haberland data->operation.operation = 0x0C; 442e4dbb0f2SStefan Haberland data->extended_parameter_length = 0; 443e4dbb0f2SStefan Haberland data->sector = 0xFF; 444e4dbb0f2SStefan Haberland break; 445f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 446f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 447f3eb5384SStefan Weinhuber data->length = tlf; 448f3eb5384SStefan Weinhuber data->operation.operation = 0x0C; 449f3eb5384SStefan Weinhuber break; 450f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_ERASE: 451f3eb5384SStefan Weinhuber data->length = reclen; 452f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 453f3eb5384SStefan Weinhuber data->operation.operation = 0x0b; 454f3eb5384SStefan Weinhuber break; 455f3eb5384SStefan Weinhuber default: 456f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, device, 457f3eb5384SStefan Weinhuber "fill LRE unknown opcode 0x%x", cmd); 458f3eb5384SStefan Weinhuber BUG(); 459f3eb5384SStefan Weinhuber } 460f3eb5384SStefan Weinhuber set_ch_t(&data->seek_addr, 461f3eb5384SStefan Weinhuber trk / private->rdc_data.trk_per_cyl, 462f3eb5384SStefan Weinhuber trk % private->rdc_data.trk_per_cyl); 463f3eb5384SStefan Weinhuber data->search_arg.cyl = data->seek_addr.cyl; 464f3eb5384SStefan Weinhuber data->search_arg.head = data->seek_addr.head; 465f3eb5384SStefan Weinhuber data->search_arg.record = rec_on_trk; 466f3eb5384SStefan Weinhuber } 467f3eb5384SStefan Weinhuber 468f3eb5384SStefan Weinhuber static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 469b44b0ab3SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 470f3eb5384SStefan Weinhuber struct dasd_device *basedev, struct dasd_device *startdev, 471f3eb5384SStefan Weinhuber unsigned char format, unsigned int rec_on_trk, int count, 472f3eb5384SStefan Weinhuber unsigned int blksize, unsigned int tlf) 4738e09f215SStefan Weinhuber { 4748e09f215SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 475f3eb5384SStefan Weinhuber struct DE_eckd_data *dedata; 476f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 477b44b0ab3SStefan Weinhuber u32 begcyl, endcyl; 478b44b0ab3SStefan Weinhuber u16 heads, beghead, endhead; 4798e09f215SStefan Weinhuber int rc = 0; 4808e09f215SStefan Weinhuber 4818e09f215SStefan Weinhuber basepriv = (struct dasd_eckd_private *) basedev->private; 4828e09f215SStefan Weinhuber startpriv = (struct dasd_eckd_private *) startdev->private; 483f3eb5384SStefan Weinhuber dedata = &pfxdata->define_extent; 484f3eb5384SStefan Weinhuber lredata = &pfxdata->locate_record; 4858e09f215SStefan Weinhuber 4868e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PFX; 4878e09f215SStefan Weinhuber ccw->flags = 0; 488e4dbb0f2SStefan Haberland if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) { 489e4dbb0f2SStefan Haberland ccw->count = sizeof(*pfxdata) + 2; 490e4dbb0f2SStefan Haberland ccw->cda = (__u32) __pa(pfxdata); 491e4dbb0f2SStefan Haberland memset(pfxdata, 0, sizeof(*pfxdata) + 2); 492e4dbb0f2SStefan Haberland } else { 4938e09f215SStefan Weinhuber ccw->count = sizeof(*pfxdata); 4948e09f215SStefan Weinhuber ccw->cda = (__u32) __pa(pfxdata); 4958e09f215SStefan Weinhuber memset(pfxdata, 0, sizeof(*pfxdata)); 496e4dbb0f2SStefan Haberland } 497e4dbb0f2SStefan Haberland 4988e09f215SStefan Weinhuber /* prefix data */ 499f3eb5384SStefan Weinhuber if (format > 1) { 500f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 501f3eb5384SStefan Weinhuber "PFX LRE unknown format 0x%x", format); 502f3eb5384SStefan Weinhuber BUG(); 503f3eb5384SStefan Weinhuber return -EINVAL; 504f3eb5384SStefan Weinhuber } 505f3eb5384SStefan Weinhuber pfxdata->format = format; 5064abb08c2SStefan Weinhuber pfxdata->base_address = basepriv->ned->unit_addr; 5074abb08c2SStefan Weinhuber pfxdata->base_lss = basepriv->ned->ID; 508f3eb5384SStefan Weinhuber pfxdata->validity.define_extent = 1; 5098e09f215SStefan Weinhuber 5108e09f215SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 5118e09f215SStefan Weinhuber if (startpriv->uid.type != UA_BASE_DEVICE) { 5128e09f215SStefan Weinhuber pfxdata->validity.verify_base = 1; 5138e09f215SStefan Weinhuber if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 5148e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 1; 5158e09f215SStefan Weinhuber } 5168e09f215SStefan Weinhuber 5178e09f215SStefan Weinhuber /* define extend data (mostly)*/ 5188e09f215SStefan Weinhuber switch (cmd) { 5198e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_HOME_ADDRESS: 5208e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_RECORD_ZERO: 5218e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ: 5228e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_MT: 5238e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD: 5248e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD_MT: 5258e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_KD: 5268e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_KD_MT: 5278e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_COUNT: 528f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 529f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 530f3eb5384SStefan Weinhuber break; 531e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_READ_TRACK: 532f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 533f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 534f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 535f3eb5384SStefan Weinhuber dedata->blk_size = 0; 5368e09f215SStefan Weinhuber break; 5378e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE: 5388e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_MT: 5398e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD: 5408e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD_MT: 541f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 542f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 5438e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 5448e09f215SStefan Weinhuber break; 5458e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD: 5468e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD_MT: 547f3eb5384SStefan Weinhuber dedata->attributes.operation = DASD_BYPASS_CACHE; 5488e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 5498e09f215SStefan Weinhuber break; 5508e09f215SStefan Weinhuber case DASD_ECKD_CCW_ERASE: 5518e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 5528e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 553f3eb5384SStefan Weinhuber dedata->mask.perm = 0x3; 554f3eb5384SStefan Weinhuber dedata->mask.auth = 0x1; 555f3eb5384SStefan Weinhuber dedata->attributes.operation = DASD_BYPASS_CACHE; 556f3eb5384SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 557f3eb5384SStefan Weinhuber break; 558e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_WRITE_FULL_TRACK: 559e4dbb0f2SStefan Haberland dedata->mask.perm = 0x03; 560e4dbb0f2SStefan Haberland dedata->attributes.operation = basepriv->attrib.operation; 561e4dbb0f2SStefan Haberland dedata->blk_size = 0; 562e4dbb0f2SStefan Haberland break; 563f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 564f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 565f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 566f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 5678e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 5688e09f215SStefan Weinhuber break; 5698e09f215SStefan Weinhuber default: 570f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 571f3eb5384SStefan Weinhuber "PFX LRE unknown opcode 0x%x", cmd); 572f3eb5384SStefan Weinhuber BUG(); 573f3eb5384SStefan Weinhuber return -EINVAL; 5748e09f215SStefan Weinhuber } 5758e09f215SStefan Weinhuber 576f3eb5384SStefan Weinhuber dedata->attributes.mode = 0x3; /* ECKD */ 5778e09f215SStefan Weinhuber 5788e09f215SStefan Weinhuber if ((basepriv->rdc_data.cu_type == 0x2105 || 5798e09f215SStefan Weinhuber basepriv->rdc_data.cu_type == 0x2107 || 5808e09f215SStefan Weinhuber basepriv->rdc_data.cu_type == 0x1750) 5818e09f215SStefan Weinhuber && !(basepriv->uses_cdl && trk < 2)) 582f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x40; /* Regular Data Format Mode */ 5838e09f215SStefan Weinhuber 584b44b0ab3SStefan Weinhuber heads = basepriv->rdc_data.trk_per_cyl; 585b44b0ab3SStefan Weinhuber begcyl = trk / heads; 586b44b0ab3SStefan Weinhuber beghead = trk % heads; 587b44b0ab3SStefan Weinhuber endcyl = totrk / heads; 588b44b0ab3SStefan Weinhuber endhead = totrk % heads; 5898e09f215SStefan Weinhuber 5908e09f215SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 591f3eb5384SStefan Weinhuber if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 592f3eb5384SStefan Weinhuber dedata->attributes.operation == DASD_SEQ_ACCESS) { 5938e09f215SStefan Weinhuber 594b44b0ab3SStefan Weinhuber if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 595b44b0ab3SStefan Weinhuber endcyl += basepriv->attrib.nr_cyl; 5968e09f215SStefan Weinhuber else 597b44b0ab3SStefan Weinhuber endcyl = (basepriv->real_cyl - 1); 5988e09f215SStefan Weinhuber } 5998e09f215SStefan Weinhuber 600f3eb5384SStefan Weinhuber set_ch_t(&dedata->beg_ext, begcyl, beghead); 601f3eb5384SStefan Weinhuber set_ch_t(&dedata->end_ext, endcyl, endhead); 602f3eb5384SStefan Weinhuber 603f3eb5384SStefan Weinhuber if (format == 1) { 604f3eb5384SStefan Weinhuber fill_LRE_data(lredata, trk, rec_on_trk, count, cmd, 605f3eb5384SStefan Weinhuber basedev, blksize, tlf); 606f3eb5384SStefan Weinhuber } 607f3eb5384SStefan Weinhuber 6088e09f215SStefan Weinhuber return rc; 6098e09f215SStefan Weinhuber } 6108e09f215SStefan Weinhuber 611f3eb5384SStefan Weinhuber static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 612f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 613f3eb5384SStefan Weinhuber struct dasd_device *basedev, struct dasd_device *startdev) 614f3eb5384SStefan Weinhuber { 615f3eb5384SStefan Weinhuber return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev, 616f3eb5384SStefan Weinhuber 0, 0, 0, 0, 0); 617f3eb5384SStefan Weinhuber } 618f3eb5384SStefan Weinhuber 6194d284cacSHeiko Carstens static void 620b44b0ab3SStefan Weinhuber locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk, 621b44b0ab3SStefan Weinhuber unsigned int rec_on_trk, int no_rec, int cmd, 6221da177e4SLinus Torvalds struct dasd_device * device, int reclen) 6231da177e4SLinus Torvalds { 6241da177e4SLinus Torvalds struct dasd_eckd_private *private; 6251da177e4SLinus Torvalds int sector; 6261da177e4SLinus Torvalds int dn, d; 6271da177e4SLinus Torvalds 6281da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 6291da177e4SLinus Torvalds 6301da177e4SLinus Torvalds DBF_DEV_EVENT(DBF_INFO, device, 6311da177e4SLinus Torvalds "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", 6321da177e4SLinus Torvalds trk, rec_on_trk, no_rec, cmd, reclen); 6331da177e4SLinus Torvalds 6341da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; 6351da177e4SLinus Torvalds ccw->flags = 0; 6361da177e4SLinus Torvalds ccw->count = 16; 6371da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 6381da177e4SLinus Torvalds 6391da177e4SLinus Torvalds memset(data, 0, sizeof(struct LO_eckd_data)); 6401da177e4SLinus Torvalds sector = 0; 6411da177e4SLinus Torvalds if (rec_on_trk) { 6421da177e4SLinus Torvalds switch (private->rdc_data.dev_type) { 6431da177e4SLinus Torvalds case 0x3390: 6441da177e4SLinus Torvalds dn = ceil_quot(reclen + 6, 232); 6451da177e4SLinus Torvalds d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 6461da177e4SLinus Torvalds sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 6471da177e4SLinus Torvalds break; 6481da177e4SLinus Torvalds case 0x3380: 6491da177e4SLinus Torvalds d = 7 + ceil_quot(reclen + 12, 32); 6501da177e4SLinus Torvalds sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 6511da177e4SLinus Torvalds break; 6521da177e4SLinus Torvalds } 6531da177e4SLinus Torvalds } 6541da177e4SLinus Torvalds data->sector = sector; 6551da177e4SLinus Torvalds data->count = no_rec; 6561da177e4SLinus Torvalds switch (cmd) { 6571da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 6581da177e4SLinus Torvalds data->operation.orientation = 0x3; 6591da177e4SLinus Torvalds data->operation.operation = 0x03; 6601da177e4SLinus Torvalds break; 6611da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 6621da177e4SLinus Torvalds data->operation.orientation = 0x3; 6631da177e4SLinus Torvalds data->operation.operation = 0x16; 6641da177e4SLinus Torvalds break; 6651da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 6661da177e4SLinus Torvalds data->operation.orientation = 0x1; 6671da177e4SLinus Torvalds data->operation.operation = 0x03; 6681da177e4SLinus Torvalds data->count++; 6691da177e4SLinus Torvalds break; 6701da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 6711da177e4SLinus Torvalds data->operation.orientation = 0x3; 6721da177e4SLinus Torvalds data->operation.operation = 0x16; 6731da177e4SLinus Torvalds data->count++; 6741da177e4SLinus Torvalds break; 6751da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 6761da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 6771da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 6781da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 6791da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6801da177e4SLinus Torvalds data->length = reclen; 6811da177e4SLinus Torvalds data->operation.operation = 0x01; 6821da177e4SLinus Torvalds break; 6831da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 6841da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 6851da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6861da177e4SLinus Torvalds data->length = reclen; 6871da177e4SLinus Torvalds data->operation.operation = 0x03; 6881da177e4SLinus Torvalds break; 6891da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 6901da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 6911da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 6921da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 6931da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6941da177e4SLinus Torvalds data->length = reclen; 6951da177e4SLinus Torvalds data->operation.operation = 0x06; 6961da177e4SLinus Torvalds break; 6971da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 6981da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 6991da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 7001da177e4SLinus Torvalds data->length = reclen; 7011da177e4SLinus Torvalds data->operation.operation = 0x16; 7021da177e4SLinus Torvalds break; 7031da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_COUNT: 7041da177e4SLinus Torvalds data->operation.operation = 0x06; 7051da177e4SLinus Torvalds break; 7061da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 7071da177e4SLinus Torvalds data->length = reclen; 7081da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 7091da177e4SLinus Torvalds data->operation.operation = 0x0b; 7101da177e4SLinus Torvalds break; 7111da177e4SLinus Torvalds default: 712fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record " 713fc19f381SStefan Haberland "opcode 0x%x", cmd); 7141da177e4SLinus Torvalds } 715b44b0ab3SStefan Weinhuber set_ch_t(&data->seek_addr, 716b44b0ab3SStefan Weinhuber trk / private->rdc_data.trk_per_cyl, 717b44b0ab3SStefan Weinhuber trk % private->rdc_data.trk_per_cyl); 718b44b0ab3SStefan Weinhuber data->search_arg.cyl = data->seek_addr.cyl; 719b44b0ab3SStefan Weinhuber data->search_arg.head = data->seek_addr.head; 7201da177e4SLinus Torvalds data->search_arg.record = rec_on_trk; 7211da177e4SLinus Torvalds } 7221da177e4SLinus Torvalds 7231da177e4SLinus Torvalds /* 7241da177e4SLinus Torvalds * Returns 1 if the block is one of the special blocks that needs 7251da177e4SLinus Torvalds * to get read/written with the KD variant of the command. 7261da177e4SLinus Torvalds * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and 7271da177e4SLinus Torvalds * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. 7281da177e4SLinus Torvalds * Luckily the KD variants differ only by one bit (0x08) from the 7291da177e4SLinus Torvalds * normal variant. So don't wonder about code like: 7301da177e4SLinus Torvalds * if (dasd_eckd_cdl_special(blk_per_trk, recid)) 7311da177e4SLinus Torvalds * ccw->cmd_code |= 0x8; 7321da177e4SLinus Torvalds */ 7331da177e4SLinus Torvalds static inline int 7341da177e4SLinus Torvalds dasd_eckd_cdl_special(int blk_per_trk, int recid) 7351da177e4SLinus Torvalds { 7361da177e4SLinus Torvalds if (recid < 3) 7371da177e4SLinus Torvalds return 1; 7381da177e4SLinus Torvalds if (recid < blk_per_trk) 7391da177e4SLinus Torvalds return 0; 7401da177e4SLinus Torvalds if (recid < 2 * blk_per_trk) 7411da177e4SLinus Torvalds return 1; 7421da177e4SLinus Torvalds return 0; 7431da177e4SLinus Torvalds } 7441da177e4SLinus Torvalds 7451da177e4SLinus Torvalds /* 7461da177e4SLinus Torvalds * Returns the record size for the special blocks of the cdl format. 7471da177e4SLinus Torvalds * Only returns something useful if dasd_eckd_cdl_special is true 7481da177e4SLinus Torvalds * for the recid. 7491da177e4SLinus Torvalds */ 7501da177e4SLinus Torvalds static inline int 7511da177e4SLinus Torvalds dasd_eckd_cdl_reclen(int recid) 7521da177e4SLinus Torvalds { 7531da177e4SLinus Torvalds if (recid < 3) 7541da177e4SLinus Torvalds return sizes_trk0[recid]; 7551da177e4SLinus Torvalds return LABEL_SIZE; 7561da177e4SLinus Torvalds } 757b206181dSStefan Haberland /* create unique id from private structure. */ 758b206181dSStefan Haberland static void create_uid(struct dasd_eckd_private *private) 7593d052595SHorst Hummel { 7604abb08c2SStefan Weinhuber int count; 761b206181dSStefan Haberland struct dasd_uid *uid; 7623d052595SHorst Hummel 7632dedf0d9SStefan Haberland uid = &private->uid; 7643d052595SHorst Hummel memset(uid, 0, sizeof(struct dasd_uid)); 7654abb08c2SStefan Weinhuber memcpy(uid->vendor, private->ned->HDA_manufacturer, 7663d052595SHorst Hummel sizeof(uid->vendor) - 1); 7673d052595SHorst Hummel EBCASC(uid->vendor, sizeof(uid->vendor) - 1); 7684abb08c2SStefan Weinhuber memcpy(uid->serial, private->ned->HDA_location, 7693d052595SHorst Hummel sizeof(uid->serial) - 1); 7703d052595SHorst Hummel EBCASC(uid->serial, sizeof(uid->serial) - 1); 7714abb08c2SStefan Weinhuber uid->ssid = private->gneq->subsystemID; 772a419aef8SJoe Perches uid->real_unit_addr = private->ned->unit_addr; 7734abb08c2SStefan Weinhuber if (private->sneq) { 7744abb08c2SStefan Weinhuber uid->type = private->sneq->sua_flags; 7758e09f215SStefan Weinhuber if (uid->type == UA_BASE_PAV_ALIAS) 7764abb08c2SStefan Weinhuber uid->base_unit_addr = private->sneq->base_unit_addr; 7778e09f215SStefan Weinhuber } else { 7788e09f215SStefan Weinhuber uid->type = UA_BASE_DEVICE; 7798e09f215SStefan Weinhuber } 7804abb08c2SStefan Weinhuber if (private->vdsneq) { 7814abb08c2SStefan Weinhuber for (count = 0; count < 16; count++) { 7824abb08c2SStefan Weinhuber sprintf(uid->vduit+2*count, "%02x", 7834abb08c2SStefan Weinhuber private->vdsneq->uit[count]); 7844abb08c2SStefan Weinhuber } 7854abb08c2SStefan Weinhuber } 786b206181dSStefan Haberland } 787b206181dSStefan Haberland 788b206181dSStefan Haberland /* 789b206181dSStefan Haberland * Generate device unique id that specifies the physical device. 790b206181dSStefan Haberland */ 791b206181dSStefan Haberland static int dasd_eckd_generate_uid(struct dasd_device *device) 792b206181dSStefan Haberland { 793b206181dSStefan Haberland struct dasd_eckd_private *private; 794b206181dSStefan Haberland unsigned long flags; 795b206181dSStefan Haberland 796b206181dSStefan Haberland private = (struct dasd_eckd_private *) device->private; 797b206181dSStefan Haberland if (!private) 798b206181dSStefan Haberland return -ENODEV; 799b206181dSStefan Haberland if (!private->ned || !private->gneq) 800b206181dSStefan Haberland return -ENODEV; 801b206181dSStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 802b206181dSStefan Haberland create_uid(private); 8032dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 8043d052595SHorst Hummel return 0; 8053d052595SHorst Hummel } 8063d052595SHorst Hummel 8072dedf0d9SStefan Haberland static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid) 8082dedf0d9SStefan Haberland { 8092dedf0d9SStefan Haberland struct dasd_eckd_private *private; 8102dedf0d9SStefan Haberland unsigned long flags; 8112dedf0d9SStefan Haberland 8122dedf0d9SStefan Haberland if (device->private) { 8132dedf0d9SStefan Haberland private = (struct dasd_eckd_private *)device->private; 8142dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 8152dedf0d9SStefan Haberland *uid = private->uid; 8162dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 8172dedf0d9SStefan Haberland return 0; 8182dedf0d9SStefan Haberland } 8192dedf0d9SStefan Haberland return -EINVAL; 8202dedf0d9SStefan Haberland } 8212dedf0d9SStefan Haberland 822b206181dSStefan Haberland /* 823b206181dSStefan Haberland * compare device UID with data of a given dasd_eckd_private structure 824b206181dSStefan Haberland * return 0 for match 825b206181dSStefan Haberland */ 826b206181dSStefan Haberland static int dasd_eckd_compare_path_uid(struct dasd_device *device, 827b206181dSStefan Haberland struct dasd_eckd_private *private) 828b206181dSStefan Haberland { 829b206181dSStefan Haberland struct dasd_uid device_uid; 830b206181dSStefan Haberland 831b206181dSStefan Haberland create_uid(private); 832b206181dSStefan Haberland dasd_eckd_get_uid(device, &device_uid); 833b206181dSStefan Haberland 834b206181dSStefan Haberland return memcmp(&device_uid, &private->uid, sizeof(struct dasd_uid)); 835b206181dSStefan Haberland } 836b206181dSStefan Haberland 837a4d26c6aSStefan Weinhuber static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device, 838a4d26c6aSStefan Weinhuber struct dasd_ccw_req *cqr, 839a4d26c6aSStefan Weinhuber __u8 *rcd_buffer, 840a4d26c6aSStefan Weinhuber __u8 lpm) 84117283b56SCornelia Huck { 84217283b56SCornelia Huck struct ccw1 *ccw; 843a4d26c6aSStefan Weinhuber /* 844a4d26c6aSStefan Weinhuber * buffer has to start with EBCDIC "V1.0" to show 845a4d26c6aSStefan Weinhuber * support for virtual device SNEQ 846a4d26c6aSStefan Weinhuber */ 847a4d26c6aSStefan Weinhuber rcd_buffer[0] = 0xE5; 848a4d26c6aSStefan Weinhuber rcd_buffer[1] = 0xF1; 849a4d26c6aSStefan Weinhuber rcd_buffer[2] = 0x4B; 850a4d26c6aSStefan Weinhuber rcd_buffer[3] = 0xF0; 85117283b56SCornelia Huck 85217283b56SCornelia Huck ccw = cqr->cpaddr; 853a4d26c6aSStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RCD; 854a4d26c6aSStefan Weinhuber ccw->flags = 0; 85517283b56SCornelia Huck ccw->cda = (__u32)(addr_t)rcd_buffer; 856a4d26c6aSStefan Weinhuber ccw->count = DASD_ECKD_RCD_DATA_SIZE; 857a4d26c6aSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 85817283b56SCornelia Huck 8598e09f215SStefan Weinhuber cqr->startdev = device; 8608e09f215SStefan Weinhuber cqr->memdev = device; 8618e09f215SStefan Weinhuber cqr->block = NULL; 86217283b56SCornelia Huck cqr->expires = 10*HZ; 86317283b56SCornelia Huck cqr->lpm = lpm; 864eb6e199bSStefan Weinhuber cqr->retries = 256; 86517283b56SCornelia Huck cqr->buildclk = get_clock(); 86617283b56SCornelia Huck cqr->status = DASD_CQR_FILLED; 867a4d26c6aSStefan Weinhuber set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 868a4d26c6aSStefan Weinhuber } 869a4d26c6aSStefan Weinhuber 8705915a873SStefan Haberland /* 8715915a873SStefan Haberland * Wakeup helper for read_conf 8725915a873SStefan Haberland * if the cqr is not done and needs some error recovery 8735915a873SStefan Haberland * the buffer has to be re-initialized with the EBCDIC "V1.0" 8745915a873SStefan Haberland * to show support for virtual device SNEQ 8755915a873SStefan Haberland */ 8765915a873SStefan Haberland static void read_conf_cb(struct dasd_ccw_req *cqr, void *data) 8775915a873SStefan Haberland { 8785915a873SStefan Haberland struct ccw1 *ccw; 8795915a873SStefan Haberland __u8 *rcd_buffer; 8805915a873SStefan Haberland 8815915a873SStefan Haberland if (cqr->status != DASD_CQR_DONE) { 8825915a873SStefan Haberland ccw = cqr->cpaddr; 8835915a873SStefan Haberland rcd_buffer = (__u8 *)((addr_t) ccw->cda); 8845915a873SStefan Haberland memset(rcd_buffer, 0, sizeof(*rcd_buffer)); 8855915a873SStefan Haberland 8865915a873SStefan Haberland rcd_buffer[0] = 0xE5; 8875915a873SStefan Haberland rcd_buffer[1] = 0xF1; 8885915a873SStefan Haberland rcd_buffer[2] = 0x4B; 8895915a873SStefan Haberland rcd_buffer[3] = 0xF0; 8905915a873SStefan Haberland } 8915915a873SStefan Haberland dasd_wakeup_cb(cqr, data); 8925915a873SStefan Haberland } 8935915a873SStefan Haberland 894a4d26c6aSStefan Weinhuber static int dasd_eckd_read_conf_immediately(struct dasd_device *device, 895a4d26c6aSStefan Weinhuber struct dasd_ccw_req *cqr, 896a4d26c6aSStefan Weinhuber __u8 *rcd_buffer, 897a4d26c6aSStefan Weinhuber __u8 lpm) 898a4d26c6aSStefan Weinhuber { 899a4d26c6aSStefan Weinhuber struct ciw *ciw; 900a4d26c6aSStefan Weinhuber int rc; 901a4d26c6aSStefan Weinhuber /* 902a4d26c6aSStefan Weinhuber * sanity check: scan for RCD command in extended SenseID data 903a4d26c6aSStefan Weinhuber * some devices do not support RCD 904a4d26c6aSStefan Weinhuber */ 905a4d26c6aSStefan Weinhuber ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 906a4d26c6aSStefan Weinhuber if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) 907a4d26c6aSStefan Weinhuber return -EOPNOTSUPP; 908a4d26c6aSStefan Weinhuber 909a4d26c6aSStefan Weinhuber dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm); 910a4d26c6aSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 9115a27e60dSStefan Weinhuber set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 912a4d26c6aSStefan Weinhuber cqr->retries = 5; 9135915a873SStefan Haberland cqr->callback = read_conf_cb; 914a4d26c6aSStefan Weinhuber rc = dasd_sleep_on_immediatly(cqr); 915a4d26c6aSStefan Weinhuber return rc; 91617283b56SCornelia Huck } 91717283b56SCornelia Huck 91817283b56SCornelia Huck static int dasd_eckd_read_conf_lpm(struct dasd_device *device, 91917283b56SCornelia Huck void **rcd_buffer, 92017283b56SCornelia Huck int *rcd_buffer_size, __u8 lpm) 92117283b56SCornelia Huck { 92217283b56SCornelia Huck struct ciw *ciw; 92317283b56SCornelia Huck char *rcd_buf = NULL; 92417283b56SCornelia Huck int ret; 92517283b56SCornelia Huck struct dasd_ccw_req *cqr; 92617283b56SCornelia Huck 92717283b56SCornelia Huck /* 928a4d26c6aSStefan Weinhuber * sanity check: scan for RCD command in extended SenseID data 929a4d26c6aSStefan Weinhuber * some devices do not support RCD 93017283b56SCornelia Huck */ 93117283b56SCornelia Huck ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 932a4d26c6aSStefan Weinhuber if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) { 93317283b56SCornelia Huck ret = -EOPNOTSUPP; 93417283b56SCornelia Huck goto out_error; 93517283b56SCornelia Huck } 936a4d26c6aSStefan Weinhuber rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA); 93717283b56SCornelia Huck if (!rcd_buf) { 93817283b56SCornelia Huck ret = -ENOMEM; 93917283b56SCornelia Huck goto out_error; 94017283b56SCornelia Huck } 941a4d26c6aSStefan Weinhuber cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, 942a4d26c6aSStefan Weinhuber 0, /* use rcd_buf as data ara */ 943a4d26c6aSStefan Weinhuber device); 94417283b56SCornelia Huck if (IS_ERR(cqr)) { 945a4d26c6aSStefan Weinhuber DBF_DEV_EVENT(DBF_WARNING, device, "%s", 946a4d26c6aSStefan Weinhuber "Could not allocate RCD request"); 947a4d26c6aSStefan Weinhuber ret = -ENOMEM; 94817283b56SCornelia Huck goto out_error; 94917283b56SCornelia Huck } 950a4d26c6aSStefan Weinhuber dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm); 9515915a873SStefan Haberland cqr->callback = read_conf_cb; 95217283b56SCornelia Huck ret = dasd_sleep_on(cqr); 95317283b56SCornelia Huck /* 95417283b56SCornelia Huck * on success we update the user input parms 95517283b56SCornelia Huck */ 9568e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 95717283b56SCornelia Huck if (ret) 95817283b56SCornelia Huck goto out_error; 95917283b56SCornelia Huck 960a4d26c6aSStefan Weinhuber *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE; 96117283b56SCornelia Huck *rcd_buffer = rcd_buf; 96217283b56SCornelia Huck return 0; 96317283b56SCornelia Huck out_error: 96417283b56SCornelia Huck kfree(rcd_buf); 96517283b56SCornelia Huck *rcd_buffer = NULL; 96617283b56SCornelia Huck *rcd_buffer_size = 0; 96717283b56SCornelia Huck return ret; 96817283b56SCornelia Huck } 96917283b56SCornelia Huck 9704abb08c2SStefan Weinhuber static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private) 9714abb08c2SStefan Weinhuber { 9724abb08c2SStefan Weinhuber 9734abb08c2SStefan Weinhuber struct dasd_sneq *sneq; 9744abb08c2SStefan Weinhuber int i, count; 9754abb08c2SStefan Weinhuber 9764abb08c2SStefan Weinhuber private->ned = NULL; 9774abb08c2SStefan Weinhuber private->sneq = NULL; 9784abb08c2SStefan Weinhuber private->vdsneq = NULL; 9794abb08c2SStefan Weinhuber private->gneq = NULL; 9804abb08c2SStefan Weinhuber count = private->conf_len / sizeof(struct dasd_sneq); 9814abb08c2SStefan Weinhuber sneq = (struct dasd_sneq *)private->conf_data; 9824abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 9834abb08c2SStefan Weinhuber if (sneq->flags.identifier == 1 && sneq->format == 1) 9844abb08c2SStefan Weinhuber private->sneq = sneq; 9854abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 1 && sneq->format == 4) 9864abb08c2SStefan Weinhuber private->vdsneq = (struct vd_sneq *)sneq; 9874abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 2) 9884abb08c2SStefan Weinhuber private->gneq = (struct dasd_gneq *)sneq; 9894abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 3 && sneq->res1 == 1) 9904abb08c2SStefan Weinhuber private->ned = (struct dasd_ned *)sneq; 9914abb08c2SStefan Weinhuber sneq++; 9924abb08c2SStefan Weinhuber } 9934abb08c2SStefan Weinhuber if (!private->ned || !private->gneq) { 9944abb08c2SStefan Weinhuber private->ned = NULL; 9954abb08c2SStefan Weinhuber private->sneq = NULL; 9964abb08c2SStefan Weinhuber private->vdsneq = NULL; 9974abb08c2SStefan Weinhuber private->gneq = NULL; 9984abb08c2SStefan Weinhuber return -EINVAL; 9994abb08c2SStefan Weinhuber } 10004abb08c2SStefan Weinhuber return 0; 10014abb08c2SStefan Weinhuber 10024abb08c2SStefan Weinhuber }; 10034abb08c2SStefan Weinhuber 10044abb08c2SStefan Weinhuber static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len) 10054abb08c2SStefan Weinhuber { 10064abb08c2SStefan Weinhuber struct dasd_gneq *gneq; 10074abb08c2SStefan Weinhuber int i, count, found; 10084abb08c2SStefan Weinhuber 10094abb08c2SStefan Weinhuber count = conf_len / sizeof(*gneq); 10104abb08c2SStefan Weinhuber gneq = (struct dasd_gneq *)conf_data; 10114abb08c2SStefan Weinhuber found = 0; 10124abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 10134abb08c2SStefan Weinhuber if (gneq->flags.identifier == 2) { 10144abb08c2SStefan Weinhuber found = 1; 10154abb08c2SStefan Weinhuber break; 10164abb08c2SStefan Weinhuber } 10174abb08c2SStefan Weinhuber gneq++; 10184abb08c2SStefan Weinhuber } 10194abb08c2SStefan Weinhuber if (found) 10204abb08c2SStefan Weinhuber return ((char *)gneq)[18] & 0x07; 10214abb08c2SStefan Weinhuber else 10224abb08c2SStefan Weinhuber return 0; 10234abb08c2SStefan Weinhuber } 10244abb08c2SStefan Weinhuber 10254abb08c2SStefan Weinhuber static int dasd_eckd_read_conf(struct dasd_device *device) 10261da177e4SLinus Torvalds { 10271da177e4SLinus Torvalds void *conf_data; 10281da177e4SLinus Torvalds int conf_len, conf_data_saved; 10291da177e4SLinus Torvalds int rc; 1030a4d26c6aSStefan Weinhuber __u8 lpm, opm; 1031b206181dSStefan Haberland struct dasd_eckd_private *private, path_private; 1032a4d26c6aSStefan Weinhuber struct dasd_path *path_data; 1033b206181dSStefan Haberland struct dasd_uid *uid; 1034b206181dSStefan Haberland char print_path_uid[60], print_device_uid[60]; 10351da177e4SLinus Torvalds 10361da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 1037a4d26c6aSStefan Weinhuber path_data = &device->path_data; 1038a4d26c6aSStefan Weinhuber opm = ccw_device_get_path_mask(device->cdev); 10391da177e4SLinus Torvalds conf_data_saved = 0; 10401da177e4SLinus Torvalds /* get configuration data per operational path */ 10411da177e4SLinus Torvalds for (lpm = 0x80; lpm; lpm>>= 1) { 1042b206181dSStefan Haberland if (!(lpm & opm)) 1043b206181dSStefan Haberland continue; 104417283b56SCornelia Huck rc = dasd_eckd_read_conf_lpm(device, &conf_data, 10451da177e4SLinus Torvalds &conf_len, lpm); 10461da177e4SLinus Torvalds if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ 1047b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 10481da177e4SLinus Torvalds "Read configuration data returned " 1049b8ed5dd5SStefan Haberland "error %d", rc); 10501da177e4SLinus Torvalds return rc; 10511da177e4SLinus Torvalds } 10521da177e4SLinus Torvalds if (conf_data == NULL) { 1053b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1054b8ed5dd5SStefan Haberland "No configuration data " 1055b8ed5dd5SStefan Haberland "retrieved"); 1056a4d26c6aSStefan Weinhuber /* no further analysis possible */ 1057a4d26c6aSStefan Weinhuber path_data->opm |= lpm; 1058d133a960SGabriel Craciunescu continue; /* no error */ 10591da177e4SLinus Torvalds } 10601da177e4SLinus Torvalds /* save first valid configuration data */ 10611da177e4SLinus Torvalds if (!conf_data_saved) { 10624abb08c2SStefan Weinhuber kfree(private->conf_data); 10634abb08c2SStefan Weinhuber private->conf_data = conf_data; 10644abb08c2SStefan Weinhuber private->conf_len = conf_len; 10654abb08c2SStefan Weinhuber if (dasd_eckd_identify_conf_parts(private)) { 10664abb08c2SStefan Weinhuber private->conf_data = NULL; 10674abb08c2SStefan Weinhuber private->conf_len = 0; 10684abb08c2SStefan Weinhuber kfree(conf_data); 10694abb08c2SStefan Weinhuber continue; 10704abb08c2SStefan Weinhuber } 1071b206181dSStefan Haberland /* 1072b206181dSStefan Haberland * build device UID that other path data 1073b206181dSStefan Haberland * can be compared to it 1074b206181dSStefan Haberland */ 1075b206181dSStefan Haberland dasd_eckd_generate_uid(device); 10761da177e4SLinus Torvalds conf_data_saved++; 1077b206181dSStefan Haberland } else { 1078b206181dSStefan Haberland path_private.conf_data = conf_data; 1079b206181dSStefan Haberland path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1080b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts( 1081b206181dSStefan Haberland &path_private)) { 1082b206181dSStefan Haberland path_private.conf_data = NULL; 1083b206181dSStefan Haberland path_private.conf_len = 0; 1084b206181dSStefan Haberland kfree(conf_data); 1085b206181dSStefan Haberland continue; 1086b206181dSStefan Haberland } 1087b206181dSStefan Haberland 1088b206181dSStefan Haberland if (dasd_eckd_compare_path_uid( 1089b206181dSStefan Haberland device, &path_private)) { 1090b206181dSStefan Haberland uid = &path_private.uid; 1091b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1092b206181dSStefan Haberland snprintf(print_path_uid, 1093b206181dSStefan Haberland sizeof(print_path_uid), 1094b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1095b206181dSStefan Haberland uid->vendor, uid->serial, 1096b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1097b206181dSStefan Haberland uid->vduit); 1098b206181dSStefan Haberland else 1099b206181dSStefan Haberland snprintf(print_path_uid, 1100b206181dSStefan Haberland sizeof(print_path_uid), 1101b206181dSStefan Haberland "%s.%s.%04x.%02x", 1102b206181dSStefan Haberland uid->vendor, uid->serial, 1103b206181dSStefan Haberland uid->ssid, 1104b206181dSStefan Haberland uid->real_unit_addr); 1105b206181dSStefan Haberland uid = &private->uid; 1106b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1107b206181dSStefan Haberland snprintf(print_device_uid, 1108b206181dSStefan Haberland sizeof(print_device_uid), 1109b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1110b206181dSStefan Haberland uid->vendor, uid->serial, 1111b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1112b206181dSStefan Haberland uid->vduit); 1113b206181dSStefan Haberland else 1114b206181dSStefan Haberland snprintf(print_device_uid, 1115b206181dSStefan Haberland sizeof(print_device_uid), 1116b206181dSStefan Haberland "%s.%s.%04x.%02x", 1117b206181dSStefan Haberland uid->vendor, uid->serial, 1118b206181dSStefan Haberland uid->ssid, 1119b206181dSStefan Haberland uid->real_unit_addr); 1120b206181dSStefan Haberland dev_err(&device->cdev->dev, 1121b206181dSStefan Haberland "Not all channel paths lead to " 1122b206181dSStefan Haberland "the same device, path %02X leads to " 1123b206181dSStefan Haberland "device %s instead of %s\n", lpm, 1124b206181dSStefan Haberland print_path_uid, print_device_uid); 1125b206181dSStefan Haberland return -EINVAL; 1126b206181dSStefan Haberland } 1127b206181dSStefan Haberland 1128b206181dSStefan Haberland path_private.conf_data = NULL; 1129b206181dSStefan Haberland path_private.conf_len = 0; 11301da177e4SLinus Torvalds } 11314abb08c2SStefan Weinhuber switch (dasd_eckd_path_access(conf_data, conf_len)) { 11321da177e4SLinus Torvalds case 0x02: 11331da177e4SLinus Torvalds path_data->npm |= lpm; 11341da177e4SLinus Torvalds break; 11351da177e4SLinus Torvalds case 0x03: 11361da177e4SLinus Torvalds path_data->ppm |= lpm; 11371da177e4SLinus Torvalds break; 11381da177e4SLinus Torvalds } 1139a4d26c6aSStefan Weinhuber path_data->opm |= lpm; 1140b206181dSStefan Haberland 11414abb08c2SStefan Weinhuber if (conf_data != private->conf_data) 11421da177e4SLinus Torvalds kfree(conf_data); 11431da177e4SLinus Torvalds } 1144b206181dSStefan Haberland 11451da177e4SLinus Torvalds return 0; 11461da177e4SLinus Torvalds } 11471da177e4SLinus Torvalds 1148a4d26c6aSStefan Weinhuber static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm) 1149a4d26c6aSStefan Weinhuber { 1150a4d26c6aSStefan Weinhuber struct dasd_eckd_private *private; 1151a4d26c6aSStefan Weinhuber int mdc; 1152a4d26c6aSStefan Weinhuber u32 fcx_max_data; 1153a4d26c6aSStefan Weinhuber 1154a4d26c6aSStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 1155a4d26c6aSStefan Weinhuber if (private->fcx_max_data) { 1156a4d26c6aSStefan Weinhuber mdc = ccw_device_get_mdc(device->cdev, lpm); 1157a4d26c6aSStefan Weinhuber if ((mdc < 0)) { 1158a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1159a4d26c6aSStefan Weinhuber "Detecting the maximum data size for zHPF " 1160a4d26c6aSStefan Weinhuber "requests failed (rc=%d) for a new path %x\n", 1161a4d26c6aSStefan Weinhuber mdc, lpm); 1162a4d26c6aSStefan Weinhuber return mdc; 1163a4d26c6aSStefan Weinhuber } 1164a4d26c6aSStefan Weinhuber fcx_max_data = mdc * FCX_MAX_DATA_FACTOR; 1165a4d26c6aSStefan Weinhuber if (fcx_max_data < private->fcx_max_data) { 1166a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1167a4d26c6aSStefan Weinhuber "The maximum data size for zHPF requests %u " 1168a4d26c6aSStefan Weinhuber "on a new path %x is below the active maximum " 1169a4d26c6aSStefan Weinhuber "%u\n", fcx_max_data, lpm, 1170a4d26c6aSStefan Weinhuber private->fcx_max_data); 1171a4d26c6aSStefan Weinhuber return -EACCES; 1172a4d26c6aSStefan Weinhuber } 1173a4d26c6aSStefan Weinhuber } 1174a4d26c6aSStefan Weinhuber return 0; 1175a4d26c6aSStefan Weinhuber } 1176a4d26c6aSStefan Weinhuber 1177b206181dSStefan Haberland static int rebuild_device_uid(struct dasd_device *device, 1178b206181dSStefan Haberland struct path_verification_work_data *data) 1179b206181dSStefan Haberland { 1180b206181dSStefan Haberland struct dasd_eckd_private *private; 1181b206181dSStefan Haberland struct dasd_path *path_data; 1182b206181dSStefan Haberland __u8 lpm, opm; 1183b206181dSStefan Haberland int rc; 1184b206181dSStefan Haberland 1185b206181dSStefan Haberland rc = -ENODEV; 1186b206181dSStefan Haberland private = (struct dasd_eckd_private *) device->private; 1187b206181dSStefan Haberland path_data = &device->path_data; 1188b206181dSStefan Haberland opm = device->path_data.opm; 1189b206181dSStefan Haberland 1190b206181dSStefan Haberland for (lpm = 0x80; lpm; lpm >>= 1) { 1191b206181dSStefan Haberland if (!(lpm & opm)) 1192b206181dSStefan Haberland continue; 1193b206181dSStefan Haberland memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1194b206181dSStefan Haberland memset(&data->cqr, 0, sizeof(data->cqr)); 1195b206181dSStefan Haberland data->cqr.cpaddr = &data->ccw; 1196b206181dSStefan Haberland rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1197b206181dSStefan Haberland data->rcd_buffer, 1198b206181dSStefan Haberland lpm); 1199b206181dSStefan Haberland 1200b206181dSStefan Haberland if (rc) { 1201b206181dSStefan Haberland if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */ 1202b206181dSStefan Haberland continue; 1203b206181dSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1204b206181dSStefan Haberland "Read configuration data " 1205b206181dSStefan Haberland "returned error %d", rc); 1206b206181dSStefan Haberland break; 1207b206181dSStefan Haberland } 1208b206181dSStefan Haberland memcpy(private->conf_data, data->rcd_buffer, 1209b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE); 1210b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts(private)) { 1211b206181dSStefan Haberland rc = -ENODEV; 1212b206181dSStefan Haberland } else /* first valid path is enough */ 1213b206181dSStefan Haberland break; 1214b206181dSStefan Haberland } 1215b206181dSStefan Haberland 1216b206181dSStefan Haberland if (!rc) 1217b206181dSStefan Haberland rc = dasd_eckd_generate_uid(device); 1218b206181dSStefan Haberland 1219b206181dSStefan Haberland return rc; 1220b206181dSStefan Haberland } 1221b206181dSStefan Haberland 1222a4d26c6aSStefan Weinhuber static void do_path_verification_work(struct work_struct *work) 1223a4d26c6aSStefan Weinhuber { 1224a4d26c6aSStefan Weinhuber struct path_verification_work_data *data; 1225a4d26c6aSStefan Weinhuber struct dasd_device *device; 1226b206181dSStefan Haberland struct dasd_eckd_private path_private; 1227b206181dSStefan Haberland struct dasd_uid *uid; 1228b206181dSStefan Haberland __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE]; 1229a4d26c6aSStefan Weinhuber __u8 lpm, opm, npm, ppm, epm; 1230a4d26c6aSStefan Weinhuber unsigned long flags; 1231b206181dSStefan Haberland char print_uid[60]; 1232a4d26c6aSStefan Weinhuber int rc; 1233a4d26c6aSStefan Weinhuber 1234a4d26c6aSStefan Weinhuber data = container_of(work, struct path_verification_work_data, worker); 1235a4d26c6aSStefan Weinhuber device = data->device; 1236a4d26c6aSStefan Weinhuber 1237c8d1c0ffSStefan Haberland /* delay path verification until device was resumed */ 1238c8d1c0ffSStefan Haberland if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 1239c8d1c0ffSStefan Haberland schedule_work(work); 1240c8d1c0ffSStefan Haberland return; 1241c8d1c0ffSStefan Haberland } 1242c8d1c0ffSStefan Haberland 1243a4d26c6aSStefan Weinhuber opm = 0; 1244a4d26c6aSStefan Weinhuber npm = 0; 1245a4d26c6aSStefan Weinhuber ppm = 0; 1246a4d26c6aSStefan Weinhuber epm = 0; 1247a4d26c6aSStefan Weinhuber for (lpm = 0x80; lpm; lpm >>= 1) { 1248b206181dSStefan Haberland if (!(lpm & data->tbvpm)) 1249b206181dSStefan Haberland continue; 1250b206181dSStefan Haberland memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1251a4d26c6aSStefan Weinhuber memset(&data->cqr, 0, sizeof(data->cqr)); 1252a4d26c6aSStefan Weinhuber data->cqr.cpaddr = &data->ccw; 1253a4d26c6aSStefan Weinhuber rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1254a4d26c6aSStefan Weinhuber data->rcd_buffer, 1255a4d26c6aSStefan Weinhuber lpm); 1256a4d26c6aSStefan Weinhuber if (!rc) { 1257a4d26c6aSStefan Weinhuber switch (dasd_eckd_path_access(data->rcd_buffer, 1258b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE) 1259b206181dSStefan Haberland ) { 1260a4d26c6aSStefan Weinhuber case 0x02: 1261a4d26c6aSStefan Weinhuber npm |= lpm; 1262a4d26c6aSStefan Weinhuber break; 1263a4d26c6aSStefan Weinhuber case 0x03: 1264a4d26c6aSStefan Weinhuber ppm |= lpm; 1265a4d26c6aSStefan Weinhuber break; 1266a4d26c6aSStefan Weinhuber } 1267a4d26c6aSStefan Weinhuber opm |= lpm; 1268a4d26c6aSStefan Weinhuber } else if (rc == -EOPNOTSUPP) { 1269a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1270a4d26c6aSStefan Weinhuber "path verification: No configuration " 1271a4d26c6aSStefan Weinhuber "data retrieved"); 1272a4d26c6aSStefan Weinhuber opm |= lpm; 1273a4d26c6aSStefan Weinhuber } else if (rc == -EAGAIN) { 1274a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1275a4d26c6aSStefan Weinhuber "path verification: device is stopped," 1276a4d26c6aSStefan Weinhuber " try again later"); 1277a4d26c6aSStefan Weinhuber epm |= lpm; 1278a4d26c6aSStefan Weinhuber } else { 1279a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1280a4d26c6aSStefan Weinhuber "Reading device feature codes failed " 1281a4d26c6aSStefan Weinhuber "(rc=%d) for new path %x\n", rc, lpm); 1282a4d26c6aSStefan Weinhuber continue; 1283a4d26c6aSStefan Weinhuber } 1284a4d26c6aSStefan Weinhuber if (verify_fcx_max_data(device, lpm)) { 1285a4d26c6aSStefan Weinhuber opm &= ~lpm; 1286a4d26c6aSStefan Weinhuber npm &= ~lpm; 1287a4d26c6aSStefan Weinhuber ppm &= ~lpm; 1288b206181dSStefan Haberland continue; 1289b206181dSStefan Haberland } 1290b206181dSStefan Haberland 1291b206181dSStefan Haberland /* 1292b206181dSStefan Haberland * save conf_data for comparison after 1293b206181dSStefan Haberland * rebuild_device_uid may have changed 1294b206181dSStefan Haberland * the original data 1295b206181dSStefan Haberland */ 1296b206181dSStefan Haberland memcpy(&path_rcd_buf, data->rcd_buffer, 1297b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE); 1298b206181dSStefan Haberland path_private.conf_data = (void *) &path_rcd_buf; 1299b206181dSStefan Haberland path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1300b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts(&path_private)) { 1301b206181dSStefan Haberland path_private.conf_data = NULL; 1302b206181dSStefan Haberland path_private.conf_len = 0; 1303b206181dSStefan Haberland continue; 1304b206181dSStefan Haberland } 1305b206181dSStefan Haberland 1306b206181dSStefan Haberland /* 1307b206181dSStefan Haberland * compare path UID with device UID only if at least 1308b206181dSStefan Haberland * one valid path is left 1309b206181dSStefan Haberland * in other case the device UID may have changed and 1310b206181dSStefan Haberland * the first working path UID will be used as device UID 1311b206181dSStefan Haberland */ 1312b206181dSStefan Haberland if (device->path_data.opm && 1313b206181dSStefan Haberland dasd_eckd_compare_path_uid(device, &path_private)) { 1314b206181dSStefan Haberland /* 1315b206181dSStefan Haberland * the comparison was not successful 1316b206181dSStefan Haberland * rebuild the device UID with at least one 1317b206181dSStefan Haberland * known path in case a z/VM hyperswap command 1318b206181dSStefan Haberland * has changed the device 1319b206181dSStefan Haberland * 1320b206181dSStefan Haberland * after this compare again 1321b206181dSStefan Haberland * 1322b206181dSStefan Haberland * if either the rebuild or the recompare fails 1323b206181dSStefan Haberland * the path can not be used 1324b206181dSStefan Haberland */ 1325b206181dSStefan Haberland if (rebuild_device_uid(device, data) || 1326b206181dSStefan Haberland dasd_eckd_compare_path_uid( 1327b206181dSStefan Haberland device, &path_private)) { 1328b206181dSStefan Haberland uid = &path_private.uid; 1329b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1330b206181dSStefan Haberland snprintf(print_uid, sizeof(print_uid), 1331b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1332b206181dSStefan Haberland uid->vendor, uid->serial, 1333b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1334b206181dSStefan Haberland uid->vduit); 1335b206181dSStefan Haberland else 1336b206181dSStefan Haberland snprintf(print_uid, sizeof(print_uid), 1337b206181dSStefan Haberland "%s.%s.%04x.%02x", 1338b206181dSStefan Haberland uid->vendor, uid->serial, 1339b206181dSStefan Haberland uid->ssid, 1340b206181dSStefan Haberland uid->real_unit_addr); 1341b206181dSStefan Haberland dev_err(&device->cdev->dev, 1342b206181dSStefan Haberland "The newly added channel path %02X " 1343b206181dSStefan Haberland "will not be used because it leads " 1344b206181dSStefan Haberland "to a different device %s\n", 1345b206181dSStefan Haberland lpm, print_uid); 1346b206181dSStefan Haberland opm &= ~lpm; 1347b206181dSStefan Haberland npm &= ~lpm; 1348b206181dSStefan Haberland ppm &= ~lpm; 1349b206181dSStefan Haberland continue; 1350a4d26c6aSStefan Weinhuber } 1351a4d26c6aSStefan Weinhuber } 1352b206181dSStefan Haberland 1353a4d26c6aSStefan Weinhuber /* 1354a4d26c6aSStefan Weinhuber * There is a small chance that a path is lost again between 1355a4d26c6aSStefan Weinhuber * above path verification and the following modification of 1356a4d26c6aSStefan Weinhuber * the device opm mask. We could avoid that race here by using 1357a4d26c6aSStefan Weinhuber * yet another path mask, but we rather deal with this unlikely 1358a4d26c6aSStefan Weinhuber * situation in dasd_start_IO. 1359a4d26c6aSStefan Weinhuber */ 1360a4d26c6aSStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1361a4d26c6aSStefan Weinhuber if (!device->path_data.opm && opm) { 1362a4d26c6aSStefan Weinhuber device->path_data.opm = opm; 1363a4d26c6aSStefan Weinhuber dasd_generic_path_operational(device); 1364a4d26c6aSStefan Weinhuber } else 1365a4d26c6aSStefan Weinhuber device->path_data.opm |= opm; 1366a4d26c6aSStefan Weinhuber device->path_data.npm |= npm; 1367a4d26c6aSStefan Weinhuber device->path_data.ppm |= ppm; 1368a4d26c6aSStefan Weinhuber device->path_data.tbvpm |= epm; 1369a4d26c6aSStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1370b206181dSStefan Haberland } 1371a4d26c6aSStefan Weinhuber 1372a4d26c6aSStefan Weinhuber dasd_put_device(device); 1373a4d26c6aSStefan Weinhuber if (data->isglobal) 1374a4d26c6aSStefan Weinhuber mutex_unlock(&dasd_path_verification_mutex); 1375a4d26c6aSStefan Weinhuber else 1376a4d26c6aSStefan Weinhuber kfree(data); 1377a4d26c6aSStefan Weinhuber } 1378a4d26c6aSStefan Weinhuber 1379a4d26c6aSStefan Weinhuber static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm) 1380a4d26c6aSStefan Weinhuber { 1381a4d26c6aSStefan Weinhuber struct path_verification_work_data *data; 1382a4d26c6aSStefan Weinhuber 1383a4d26c6aSStefan Weinhuber data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA); 1384a4d26c6aSStefan Weinhuber if (!data) { 1385a4d26c6aSStefan Weinhuber if (mutex_trylock(&dasd_path_verification_mutex)) { 1386a4d26c6aSStefan Weinhuber data = path_verification_worker; 1387a4d26c6aSStefan Weinhuber data->isglobal = 1; 1388a4d26c6aSStefan Weinhuber } else 1389a4d26c6aSStefan Weinhuber return -ENOMEM; 1390a4d26c6aSStefan Weinhuber } else { 1391a4d26c6aSStefan Weinhuber memset(data, 0, sizeof(*data)); 1392a4d26c6aSStefan Weinhuber data->isglobal = 0; 1393a4d26c6aSStefan Weinhuber } 1394a4d26c6aSStefan Weinhuber INIT_WORK(&data->worker, do_path_verification_work); 1395a4d26c6aSStefan Weinhuber dasd_get_device(device); 1396a4d26c6aSStefan Weinhuber data->device = device; 1397a4d26c6aSStefan Weinhuber data->tbvpm = lpm; 1398a4d26c6aSStefan Weinhuber schedule_work(&data->worker); 1399a4d26c6aSStefan Weinhuber return 0; 1400a4d26c6aSStefan Weinhuber } 1401a4d26c6aSStefan Weinhuber 14028e09f215SStefan Weinhuber static int dasd_eckd_read_features(struct dasd_device *device) 14038e09f215SStefan Weinhuber { 14048e09f215SStefan Weinhuber struct dasd_psf_prssd_data *prssdp; 14058e09f215SStefan Weinhuber struct dasd_rssd_features *features; 14068e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 14078e09f215SStefan Weinhuber struct ccw1 *ccw; 14088e09f215SStefan Weinhuber int rc; 14098e09f215SStefan Weinhuber struct dasd_eckd_private *private; 14108e09f215SStefan Weinhuber 14118e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 141268d1e5f0SStefan Weinhuber memset(&private->features, 0, sizeof(struct dasd_rssd_features)); 141368b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 14148e09f215SStefan Weinhuber (sizeof(struct dasd_psf_prssd_data) + 14158e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)), 14168e09f215SStefan Weinhuber device); 14178e09f215SStefan Weinhuber if (IS_ERR(cqr)) { 1418b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " 1419b8ed5dd5SStefan Haberland "allocate initialization request"); 14208e09f215SStefan Weinhuber return PTR_ERR(cqr); 14218e09f215SStefan Weinhuber } 14228e09f215SStefan Weinhuber cqr->startdev = device; 14238e09f215SStefan Weinhuber cqr->memdev = device; 14248e09f215SStefan Weinhuber cqr->block = NULL; 1425eb6e199bSStefan Weinhuber cqr->retries = 256; 14268e09f215SStefan Weinhuber cqr->expires = 10 * HZ; 14278e09f215SStefan Weinhuber 14288e09f215SStefan Weinhuber /* Prepare for Read Subsystem Data */ 14298e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 14308e09f215SStefan Weinhuber memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 14318e09f215SStefan Weinhuber prssdp->order = PSF_ORDER_PRSSD; 14328e09f215SStefan Weinhuber prssdp->suborder = 0x41; /* Read Feature Codes */ 14338e09f215SStefan Weinhuber /* all other bytes of prssdp must be zero */ 14348e09f215SStefan Weinhuber 14358e09f215SStefan Weinhuber ccw = cqr->cpaddr; 14368e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PSF; 14378e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_psf_prssd_data); 14388e09f215SStefan Weinhuber ccw->flags |= CCW_FLAG_CC; 14398e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) prssdp; 14408e09f215SStefan Weinhuber 14418e09f215SStefan Weinhuber /* Read Subsystem Data - feature codes */ 14428e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 14438e09f215SStefan Weinhuber memset(features, 0, sizeof(struct dasd_rssd_features)); 14448e09f215SStefan Weinhuber 14458e09f215SStefan Weinhuber ccw++; 14468e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RSSD; 14478e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_rssd_features); 14488e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) features; 14498e09f215SStefan Weinhuber 14508e09f215SStefan Weinhuber cqr->buildclk = get_clock(); 14518e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 14528e09f215SStefan Weinhuber rc = dasd_sleep_on(cqr); 14538e09f215SStefan Weinhuber if (rc == 0) { 14548e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 14558e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 14568e09f215SStefan Weinhuber memcpy(&private->features, features, 14578e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)); 145868d1e5f0SStefan Weinhuber } else 145968d1e5f0SStefan Weinhuber dev_warn(&device->cdev->dev, "Reading device feature codes" 146068d1e5f0SStefan Weinhuber " failed with rc=%d\n", rc); 14618e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 14628e09f215SStefan Weinhuber return rc; 14638e09f215SStefan Weinhuber } 14648e09f215SStefan Weinhuber 14658e09f215SStefan Weinhuber 14663d052595SHorst Hummel /* 146740545573SHorst Hummel * Build CP for Perform Subsystem Function - SSC. 146840545573SHorst Hummel */ 1469f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, 1470f3eb5384SStefan Weinhuber int enable_pav) 147140545573SHorst Hummel { 147240545573SHorst Hummel struct dasd_ccw_req *cqr; 147340545573SHorst Hummel struct dasd_psf_ssc_data *psf_ssc_data; 147440545573SHorst Hummel struct ccw1 *ccw; 147540545573SHorst Hummel 147668b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 147740545573SHorst Hummel sizeof(struct dasd_psf_ssc_data), 147840545573SHorst Hummel device); 147940545573SHorst Hummel 148040545573SHorst Hummel if (IS_ERR(cqr)) { 1481fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 148240545573SHorst Hummel "Could not allocate PSF-SSC request"); 148340545573SHorst Hummel return cqr; 148440545573SHorst Hummel } 148540545573SHorst Hummel psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 148640545573SHorst Hummel psf_ssc_data->order = PSF_ORDER_SSC; 1487626350b6SStefan Weinhuber psf_ssc_data->suborder = 0xc0; 1488f3eb5384SStefan Weinhuber if (enable_pav) { 1489626350b6SStefan Weinhuber psf_ssc_data->suborder |= 0x08; 14908e09f215SStefan Weinhuber psf_ssc_data->reserved[0] = 0x88; 1491f3eb5384SStefan Weinhuber } 149240545573SHorst Hummel ccw = cqr->cpaddr; 149340545573SHorst Hummel ccw->cmd_code = DASD_ECKD_CCW_PSF; 149440545573SHorst Hummel ccw->cda = (__u32)(addr_t)psf_ssc_data; 149540545573SHorst Hummel ccw->count = 66; 149640545573SHorst Hummel 14978e09f215SStefan Weinhuber cqr->startdev = device; 14988e09f215SStefan Weinhuber cqr->memdev = device; 14998e09f215SStefan Weinhuber cqr->block = NULL; 1500eb6e199bSStefan Weinhuber cqr->retries = 256; 150140545573SHorst Hummel cqr->expires = 10*HZ; 150240545573SHorst Hummel cqr->buildclk = get_clock(); 150340545573SHorst Hummel cqr->status = DASD_CQR_FILLED; 150440545573SHorst Hummel return cqr; 150540545573SHorst Hummel } 150640545573SHorst Hummel 150740545573SHorst Hummel /* 150840545573SHorst Hummel * Perform Subsystem Function. 150940545573SHorst Hummel * It is necessary to trigger CIO for channel revalidation since this 151040545573SHorst Hummel * call might change behaviour of DASD devices. 151140545573SHorst Hummel */ 151240545573SHorst Hummel static int 151312d7b107SStefan Haberland dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav, 151412d7b107SStefan Haberland unsigned long flags) 151540545573SHorst Hummel { 151640545573SHorst Hummel struct dasd_ccw_req *cqr; 151740545573SHorst Hummel int rc; 151840545573SHorst Hummel 1519f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_psf_ssc(device, enable_pav); 152040545573SHorst Hummel if (IS_ERR(cqr)) 152140545573SHorst Hummel return PTR_ERR(cqr); 152240545573SHorst Hummel 152312d7b107SStefan Haberland /* 152412d7b107SStefan Haberland * set flags e.g. turn on failfast, to prevent blocking 152512d7b107SStefan Haberland * the calling function should handle failed requests 152612d7b107SStefan Haberland */ 152712d7b107SStefan Haberland cqr->flags |= flags; 152812d7b107SStefan Haberland 152940545573SHorst Hummel rc = dasd_sleep_on(cqr); 153040545573SHorst Hummel if (!rc) 153140545573SHorst Hummel /* trigger CIO to reprobe devices */ 153240545573SHorst Hummel css_schedule_reprobe(); 153312d7b107SStefan Haberland else if (cqr->intrc == -EAGAIN) 153412d7b107SStefan Haberland rc = -EAGAIN; 153512d7b107SStefan Haberland 15368e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 153740545573SHorst Hummel return rc; 153840545573SHorst Hummel } 153940545573SHorst Hummel 154040545573SHorst Hummel /* 154140545573SHorst Hummel * Valide storage server of current device. 154240545573SHorst Hummel */ 154312d7b107SStefan Haberland static int dasd_eckd_validate_server(struct dasd_device *device, 154412d7b107SStefan Haberland unsigned long flags) 154540545573SHorst Hummel { 154640545573SHorst Hummel int rc; 15478e09f215SStefan Weinhuber struct dasd_eckd_private *private; 1548f3eb5384SStefan Weinhuber int enable_pav; 154940545573SHorst Hummel 1550f9f8d02fSStefan Haberland private = (struct dasd_eckd_private *) device->private; 1551f9f8d02fSStefan Haberland if (private->uid.type == UA_BASE_PAV_ALIAS || 1552f9f8d02fSStefan Haberland private->uid.type == UA_HYPER_PAV_ALIAS) 155312d7b107SStefan Haberland return 0; 155440545573SHorst Hummel if (dasd_nopav || MACHINE_IS_VM) 1555f3eb5384SStefan Weinhuber enable_pav = 0; 1556f3eb5384SStefan Weinhuber else 1557f3eb5384SStefan Weinhuber enable_pav = 1; 155812d7b107SStefan Haberland rc = dasd_eckd_psf_ssc(device, enable_pav, flags); 1559eb6e199bSStefan Weinhuber 156040545573SHorst Hummel /* may be requested feature is not available on server, 156140545573SHorst Hummel * therefore just report error and go ahead */ 1562b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " 1563b8ed5dd5SStefan Haberland "returned rc=%d", private->uid.ssid, rc); 156412d7b107SStefan Haberland return rc; 156540545573SHorst Hummel } 156640545573SHorst Hummel 1567f1633031SStefan Haberland /* 1568f1633031SStefan Haberland * worker to do a validate server in case of a lost pathgroup 1569f1633031SStefan Haberland */ 1570f1633031SStefan Haberland static void dasd_eckd_do_validate_server(struct work_struct *work) 1571f1633031SStefan Haberland { 1572f1633031SStefan Haberland struct dasd_device *device = container_of(work, struct dasd_device, 1573f1633031SStefan Haberland kick_validate); 157412d7b107SStefan Haberland if (dasd_eckd_validate_server(device, DASD_CQR_FLAGS_FAILFAST) 157512d7b107SStefan Haberland == -EAGAIN) { 157612d7b107SStefan Haberland /* schedule worker again if failed */ 157712d7b107SStefan Haberland schedule_work(&device->kick_validate); 157812d7b107SStefan Haberland return; 157912d7b107SStefan Haberland } 158012d7b107SStefan Haberland 1581f1633031SStefan Haberland dasd_put_device(device); 1582f1633031SStefan Haberland } 1583f1633031SStefan Haberland 1584f1633031SStefan Haberland static void dasd_eckd_kick_validate_server(struct dasd_device *device) 1585f1633031SStefan Haberland { 1586f1633031SStefan Haberland dasd_get_device(device); 158725e2cf1cSStefan Haberland /* exit if device not online or in offline processing */ 158825e2cf1cSStefan Haberland if (test_bit(DASD_FLAG_OFFLINE, &device->flags) || 158925e2cf1cSStefan Haberland device->state < DASD_STATE_ONLINE) { 159025e2cf1cSStefan Haberland dasd_put_device(device); 159125e2cf1cSStefan Haberland return; 159225e2cf1cSStefan Haberland } 1593f1633031SStefan Haberland /* queue call to do_validate_server to the kernel event daemon. */ 1594f1633031SStefan Haberland schedule_work(&device->kick_validate); 1595f1633031SStefan Haberland } 1596f1633031SStefan Haberland 1597ef19298bSStefan Weinhuber static u32 get_fcx_max_data(struct dasd_device *device) 1598ef19298bSStefan Weinhuber { 1599ef19298bSStefan Weinhuber #if defined(CONFIG_64BIT) 1600ef19298bSStefan Weinhuber int tpm, mdc; 1601ef19298bSStefan Weinhuber int fcx_in_css, fcx_in_gneq, fcx_in_features; 1602ef19298bSStefan Weinhuber struct dasd_eckd_private *private; 1603ef19298bSStefan Weinhuber 1604ef19298bSStefan Weinhuber if (dasd_nofcx) 1605ef19298bSStefan Weinhuber return 0; 1606ef19298bSStefan Weinhuber /* is transport mode supported? */ 1607ef19298bSStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 1608ef19298bSStefan Weinhuber fcx_in_css = css_general_characteristics.fcx; 1609ef19298bSStefan Weinhuber fcx_in_gneq = private->gneq->reserved2[7] & 0x04; 1610ef19298bSStefan Weinhuber fcx_in_features = private->features.feature[40] & 0x80; 1611ef19298bSStefan Weinhuber tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; 1612ef19298bSStefan Weinhuber 1613ef19298bSStefan Weinhuber if (!tpm) 1614ef19298bSStefan Weinhuber return 0; 1615ef19298bSStefan Weinhuber 1616ef19298bSStefan Weinhuber mdc = ccw_device_get_mdc(device->cdev, 0); 1617ef19298bSStefan Weinhuber if (mdc < 0) { 1618ef19298bSStefan Weinhuber dev_warn(&device->cdev->dev, "Detecting the maximum supported" 1619ef19298bSStefan Weinhuber " data size for zHPF requests failed\n"); 1620ef19298bSStefan Weinhuber return 0; 1621ef19298bSStefan Weinhuber } else 1622ef19298bSStefan Weinhuber return mdc * FCX_MAX_DATA_FACTOR; 1623ef19298bSStefan Weinhuber #else 1624ef19298bSStefan Weinhuber return 0; 1625ef19298bSStefan Weinhuber #endif 1626ef19298bSStefan Weinhuber } 1627ef19298bSStefan Weinhuber 162840545573SHorst Hummel /* 16293d052595SHorst Hummel * Check device characteristics. 16303d052595SHorst Hummel * If the device is accessible using ECKD discipline, the device is enabled. 16313d052595SHorst Hummel */ 16321da177e4SLinus Torvalds static int 16331da177e4SLinus Torvalds dasd_eckd_check_characteristics(struct dasd_device *device) 16341da177e4SLinus Torvalds { 16351da177e4SLinus Torvalds struct dasd_eckd_private *private; 16368e09f215SStefan Weinhuber struct dasd_block *block; 16372dedf0d9SStefan Haberland struct dasd_uid temp_uid; 1638f9f8d02fSStefan Haberland int rc, i; 163933b62a30SStefan Weinhuber int readonly; 16407c8faa86SStefan Haberland unsigned long value; 16411da177e4SLinus Torvalds 1642f1633031SStefan Haberland /* setup work queue for validate server*/ 1643f1633031SStefan Haberland INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server); 1644f1633031SStefan Haberland 1645454e1fa1SPeter Oberparleiter if (!ccw_device_is_pathgroup(device->cdev)) { 1646454e1fa1SPeter Oberparleiter dev_warn(&device->cdev->dev, 1647454e1fa1SPeter Oberparleiter "A channel path group could not be established\n"); 1648454e1fa1SPeter Oberparleiter return -EIO; 1649454e1fa1SPeter Oberparleiter } 1650454e1fa1SPeter Oberparleiter if (!ccw_device_is_multipath(device->cdev)) { 1651454e1fa1SPeter Oberparleiter dev_info(&device->cdev->dev, 1652454e1fa1SPeter Oberparleiter "The DASD is not operating in multipath mode\n"); 1653454e1fa1SPeter Oberparleiter } 16541da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 165592636b15SSebastian Ott if (!private) { 165692636b15SSebastian Ott private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); 165792636b15SSebastian Ott if (!private) { 1658fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1659fc19f381SStefan Haberland "Allocating memory for private DASD data " 1660fc19f381SStefan Haberland "failed\n"); 16611da177e4SLinus Torvalds return -ENOMEM; 16621da177e4SLinus Torvalds } 16631da177e4SLinus Torvalds device->private = (void *) private; 166492636b15SSebastian Ott } else { 166592636b15SSebastian Ott memset(private, 0, sizeof(*private)); 16661da177e4SLinus Torvalds } 16671da177e4SLinus Torvalds /* Invalidate status of initial analysis. */ 16681da177e4SLinus Torvalds private->init_cqr_status = -1; 16691da177e4SLinus Torvalds /* Set default cache operations. */ 16701da177e4SLinus Torvalds private->attrib.operation = DASD_NORMAL_CACHE; 16711da177e4SLinus Torvalds private->attrib.nr_cyl = 0; 16721da177e4SLinus Torvalds 167340545573SHorst Hummel /* Read Configuration Data */ 167440545573SHorst Hummel rc = dasd_eckd_read_conf(device); 167540545573SHorst Hummel if (rc) 16768e09f215SStefan Weinhuber goto out_err1; 167740545573SHorst Hummel 16787c8faa86SStefan Haberland /* set default timeout */ 16797c8faa86SStefan Haberland device->default_expires = DASD_EXPIRES; 16807c8faa86SStefan Haberland if (private->gneq) { 16817c8faa86SStefan Haberland value = 1; 16827c8faa86SStefan Haberland for (i = 0; i < private->gneq->timeout.value; i++) 16837c8faa86SStefan Haberland value = 10 * value; 16847c8faa86SStefan Haberland value = value * private->gneq->timeout.number; 16857c8faa86SStefan Haberland /* do not accept useless values */ 16867c8faa86SStefan Haberland if (value != 0 && value <= DASD_EXPIRES_MAX) 16877c8faa86SStefan Haberland device->default_expires = value; 16887c8faa86SStefan Haberland } 16897c8faa86SStefan Haberland 16902dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 16912dedf0d9SStefan Haberland if (temp_uid.type == UA_BASE_DEVICE) { 16928e09f215SStefan Weinhuber block = dasd_alloc_block(); 16938e09f215SStefan Weinhuber if (IS_ERR(block)) { 1694b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1695b8ed5dd5SStefan Haberland "could not allocate dasd " 1696b8ed5dd5SStefan Haberland "block structure"); 16978e09f215SStefan Weinhuber rc = PTR_ERR(block); 16988e09f215SStefan Weinhuber goto out_err1; 16998e09f215SStefan Weinhuber } 17008e09f215SStefan Weinhuber device->block = block; 17018e09f215SStefan Weinhuber block->base = device; 17028e09f215SStefan Weinhuber } 17038e09f215SStefan Weinhuber 1704f9f8d02fSStefan Haberland /* register lcu with alias handling, enable PAV */ 1705f9f8d02fSStefan Haberland rc = dasd_alias_make_device_known_to_lcu(device); 1706f9f8d02fSStefan Haberland if (rc) 17078e09f215SStefan Weinhuber goto out_err2; 1708f9f8d02fSStefan Haberland 170912d7b107SStefan Haberland dasd_eckd_validate_server(device, 0); 1710f4ac1d02SStefan Weinhuber 1711f4ac1d02SStefan Weinhuber /* device may report different configuration data after LCU setup */ 1712f4ac1d02SStefan Weinhuber rc = dasd_eckd_read_conf(device); 171340545573SHorst Hummel if (rc) 17148e09f215SStefan Weinhuber goto out_err3; 17158e09f215SStefan Weinhuber 17168e09f215SStefan Weinhuber /* Read Feature Codes */ 171768d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 171840545573SHorst Hummel 17191da177e4SLinus Torvalds /* Read Device Characteristics */ 172068b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 172168b781feSStefan Haberland &private->rdc_data, 64); 17228e09f215SStefan Weinhuber if (rc) { 1723b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1724b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 17258e09f215SStefan Weinhuber goto out_err3; 17268e09f215SStefan Weinhuber } 172734cd551aSStefan Haberland 172834cd551aSStefan Haberland if ((device->features & DASD_FEATURE_USERAW) && 172934cd551aSStefan Haberland !(private->rdc_data.facilities.RT_in_LR)) { 173034cd551aSStefan Haberland dev_err(&device->cdev->dev, "The storage server does not " 173134cd551aSStefan Haberland "support raw-track access\n"); 173234cd551aSStefan Haberland rc = -EINVAL; 173334cd551aSStefan Haberland goto out_err3; 173434cd551aSStefan Haberland } 173534cd551aSStefan Haberland 1736817f2c84SNikanth Karthikesan /* find the valid cylinder size */ 1737b44b0ab3SStefan Weinhuber if (private->rdc_data.no_cyl == LV_COMPAT_CYL && 1738b44b0ab3SStefan Weinhuber private->rdc_data.long_no_cyl) 1739b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.long_no_cyl; 1740b44b0ab3SStefan Weinhuber else 1741b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.no_cyl; 1742b44b0ab3SStefan Weinhuber 1743ef19298bSStefan Weinhuber private->fcx_max_data = get_fcx_max_data(device); 1744ef19298bSStefan Weinhuber 174533b62a30SStefan Weinhuber readonly = dasd_device_is_ro(device); 174633b62a30SStefan Weinhuber if (readonly) 174733b62a30SStefan Weinhuber set_bit(DASD_FLAG_DEVICE_RO, &device->flags); 174833b62a30SStefan Weinhuber 1749fc19f381SStefan Haberland dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " 175033b62a30SStefan Weinhuber "with %d cylinders, %d heads, %d sectors%s\n", 17511da177e4SLinus Torvalds private->rdc_data.dev_type, 17521da177e4SLinus Torvalds private->rdc_data.dev_model, 17531da177e4SLinus Torvalds private->rdc_data.cu_type, 17541da177e4SLinus Torvalds private->rdc_data.cu_model.model, 1755b44b0ab3SStefan Weinhuber private->real_cyl, 17561da177e4SLinus Torvalds private->rdc_data.trk_per_cyl, 175733b62a30SStefan Weinhuber private->rdc_data.sec_per_trk, 175833b62a30SStefan Weinhuber readonly ? ", read-only device" : ""); 17598e09f215SStefan Weinhuber return 0; 17608e09f215SStefan Weinhuber 17618e09f215SStefan Weinhuber out_err3: 17628e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 17638e09f215SStefan Weinhuber out_err2: 17648e09f215SStefan Weinhuber dasd_free_block(device->block); 17658e09f215SStefan Weinhuber device->block = NULL; 17668e09f215SStefan Weinhuber out_err1: 17674abb08c2SStefan Weinhuber kfree(private->conf_data); 17688e09f215SStefan Weinhuber kfree(device->private); 17698e09f215SStefan Weinhuber device->private = NULL; 17703d052595SHorst Hummel return rc; 17711da177e4SLinus Torvalds } 17721da177e4SLinus Torvalds 17738e09f215SStefan Weinhuber static void dasd_eckd_uncheck_device(struct dasd_device *device) 17748e09f215SStefan Weinhuber { 17754abb08c2SStefan Weinhuber struct dasd_eckd_private *private; 17764abb08c2SStefan Weinhuber 17774abb08c2SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 17788e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 17794abb08c2SStefan Weinhuber private->ned = NULL; 17804abb08c2SStefan Weinhuber private->sneq = NULL; 17814abb08c2SStefan Weinhuber private->vdsneq = NULL; 17824abb08c2SStefan Weinhuber private->gneq = NULL; 17834abb08c2SStefan Weinhuber private->conf_len = 0; 17844abb08c2SStefan Weinhuber kfree(private->conf_data); 17854abb08c2SStefan Weinhuber private->conf_data = NULL; 17868e09f215SStefan Weinhuber } 17878e09f215SStefan Weinhuber 17881da177e4SLinus Torvalds static struct dasd_ccw_req * 17891da177e4SLinus Torvalds dasd_eckd_analysis_ccw(struct dasd_device *device) 17901da177e4SLinus Torvalds { 17911da177e4SLinus Torvalds struct dasd_eckd_private *private; 17921da177e4SLinus Torvalds struct eckd_count *count_data; 17931da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 17941da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 17951da177e4SLinus Torvalds struct ccw1 *ccw; 17961da177e4SLinus Torvalds int cplength, datasize; 17971da177e4SLinus Torvalds int i; 17981da177e4SLinus Torvalds 17991da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 18001da177e4SLinus Torvalds 18011da177e4SLinus Torvalds cplength = 8; 18021da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 180368b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 18041da177e4SLinus Torvalds if (IS_ERR(cqr)) 18051da177e4SLinus Torvalds return cqr; 18061da177e4SLinus Torvalds ccw = cqr->cpaddr; 18071da177e4SLinus Torvalds /* Define extent for the first 3 tracks. */ 18081da177e4SLinus Torvalds define_extent(ccw++, cqr->data, 0, 2, 18091da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device); 18101da177e4SLinus Torvalds LO_data = cqr->data + sizeof(struct DE_eckd_data); 18111da177e4SLinus Torvalds /* Locate record for the first 4 records on track 0. */ 18121da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18131da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 0, 0, 4, 18141da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 18151da177e4SLinus Torvalds 18161da177e4SLinus Torvalds count_data = private->count_area; 18171da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 18181da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18191da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 18201da177e4SLinus Torvalds ccw->flags = 0; 18211da177e4SLinus Torvalds ccw->count = 8; 18221da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 18231da177e4SLinus Torvalds ccw++; 18241da177e4SLinus Torvalds count_data++; 18251da177e4SLinus Torvalds } 18261da177e4SLinus Torvalds 18271da177e4SLinus Torvalds /* Locate record for the first record on track 2. */ 18281da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18291da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 2, 0, 1, 18301da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 18311da177e4SLinus Torvalds /* Read count ccw. */ 18321da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18331da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 18341da177e4SLinus Torvalds ccw->flags = 0; 18351da177e4SLinus Torvalds ccw->count = 8; 18361da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 18371da177e4SLinus Torvalds 18388e09f215SStefan Weinhuber cqr->block = NULL; 18398e09f215SStefan Weinhuber cqr->startdev = device; 18408e09f215SStefan Weinhuber cqr->memdev = device; 1841eb6e199bSStefan Weinhuber cqr->retries = 255; 18421da177e4SLinus Torvalds cqr->buildclk = get_clock(); 18431da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 18441da177e4SLinus Torvalds return cqr; 18451da177e4SLinus Torvalds } 18461da177e4SLinus Torvalds 1847eb6e199bSStefan Weinhuber /* differentiate between 'no record found' and any other error */ 1848eb6e199bSStefan Weinhuber static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) 1849eb6e199bSStefan Weinhuber { 1850eb6e199bSStefan Weinhuber char *sense; 1851eb6e199bSStefan Weinhuber if (init_cqr->status == DASD_CQR_DONE) 1852eb6e199bSStefan Weinhuber return INIT_CQR_OK; 1853eb6e199bSStefan Weinhuber else if (init_cqr->status == DASD_CQR_NEED_ERP || 1854eb6e199bSStefan Weinhuber init_cqr->status == DASD_CQR_FAILED) { 1855eb6e199bSStefan Weinhuber sense = dasd_get_sense(&init_cqr->irb); 1856eb6e199bSStefan Weinhuber if (sense && (sense[1] & SNS1_NO_REC_FOUND)) 1857eb6e199bSStefan Weinhuber return INIT_CQR_UNFORMATTED; 1858eb6e199bSStefan Weinhuber else 1859eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 1860eb6e199bSStefan Weinhuber } else 1861eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 1862eb6e199bSStefan Weinhuber } 1863eb6e199bSStefan Weinhuber 18641da177e4SLinus Torvalds /* 18651da177e4SLinus Torvalds * This is the callback function for the init_analysis cqr. It saves 18661da177e4SLinus Torvalds * the status of the initial analysis ccw before it frees it and kicks 18671da177e4SLinus Torvalds * the device to continue the startup sequence. This will call 18681da177e4SLinus Torvalds * dasd_eckd_do_analysis again (if the devices has not been marked 18691da177e4SLinus Torvalds * for deletion in the meantime). 18701da177e4SLinus Torvalds */ 1871eb6e199bSStefan Weinhuber static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, 1872eb6e199bSStefan Weinhuber void *data) 18731da177e4SLinus Torvalds { 18741da177e4SLinus Torvalds struct dasd_eckd_private *private; 18751da177e4SLinus Torvalds struct dasd_device *device; 18761da177e4SLinus Torvalds 18778e09f215SStefan Weinhuber device = init_cqr->startdev; 18781da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 1879eb6e199bSStefan Weinhuber private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); 18801da177e4SLinus Torvalds dasd_sfree_request(init_cqr, device); 18811da177e4SLinus Torvalds dasd_kick_device(device); 18821da177e4SLinus Torvalds } 18831da177e4SLinus Torvalds 1884eb6e199bSStefan Weinhuber static int dasd_eckd_start_analysis(struct dasd_block *block) 18851da177e4SLinus Torvalds { 18861da177e4SLinus Torvalds struct dasd_ccw_req *init_cqr; 18871da177e4SLinus Torvalds 18888e09f215SStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(block->base); 18891da177e4SLinus Torvalds if (IS_ERR(init_cqr)) 18901da177e4SLinus Torvalds return PTR_ERR(init_cqr); 18911da177e4SLinus Torvalds init_cqr->callback = dasd_eckd_analysis_callback; 18921da177e4SLinus Torvalds init_cqr->callback_data = NULL; 18931da177e4SLinus Torvalds init_cqr->expires = 5*HZ; 1894eb6e199bSStefan Weinhuber /* first try without ERP, so we can later handle unformatted 1895eb6e199bSStefan Weinhuber * devices as special case 1896eb6e199bSStefan Weinhuber */ 1897eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); 1898eb6e199bSStefan Weinhuber init_cqr->retries = 0; 18991da177e4SLinus Torvalds dasd_add_request_head(init_cqr); 19001da177e4SLinus Torvalds return -EAGAIN; 19011da177e4SLinus Torvalds } 19021da177e4SLinus Torvalds 1903eb6e199bSStefan Weinhuber static int dasd_eckd_end_analysis(struct dasd_block *block) 19041da177e4SLinus Torvalds { 19058e09f215SStefan Weinhuber struct dasd_device *device; 19061da177e4SLinus Torvalds struct dasd_eckd_private *private; 19071da177e4SLinus Torvalds struct eckd_count *count_area; 19081da177e4SLinus Torvalds unsigned int sb, blk_per_trk; 19091da177e4SLinus Torvalds int status, i; 1910eb6e199bSStefan Weinhuber struct dasd_ccw_req *init_cqr; 19111da177e4SLinus Torvalds 19128e09f215SStefan Weinhuber device = block->base; 19131da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 19141da177e4SLinus Torvalds status = private->init_cqr_status; 19151da177e4SLinus Torvalds private->init_cqr_status = -1; 1916eb6e199bSStefan Weinhuber if (status == INIT_CQR_ERROR) { 1917eb6e199bSStefan Weinhuber /* try again, this time with full ERP */ 1918eb6e199bSStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(device); 1919eb6e199bSStefan Weinhuber dasd_sleep_on(init_cqr); 1920eb6e199bSStefan Weinhuber status = dasd_eckd_analysis_evaluation(init_cqr); 1921eb6e199bSStefan Weinhuber dasd_sfree_request(init_cqr, device); 1922eb6e199bSStefan Weinhuber } 1923eb6e199bSStefan Weinhuber 1924e4dbb0f2SStefan Haberland if (device->features & DASD_FEATURE_USERAW) { 1925e4dbb0f2SStefan Haberland block->bp_block = DASD_RAW_BLOCKSIZE; 1926e4dbb0f2SStefan Haberland blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; 1927e4dbb0f2SStefan Haberland block->s2b_shift = 3; 1928e4dbb0f2SStefan Haberland goto raw; 1929e4dbb0f2SStefan Haberland } 1930e4dbb0f2SStefan Haberland 1931eb6e199bSStefan Weinhuber if (status == INIT_CQR_UNFORMATTED) { 1932eb6e199bSStefan Weinhuber dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); 19331da177e4SLinus Torvalds return -EMEDIUMTYPE; 1934eb6e199bSStefan Weinhuber } else if (status == INIT_CQR_ERROR) { 1935eb6e199bSStefan Weinhuber dev_err(&device->cdev->dev, 1936eb6e199bSStefan Weinhuber "Detecting the DASD disk layout failed because " 1937eb6e199bSStefan Weinhuber "of an I/O error\n"); 1938eb6e199bSStefan Weinhuber return -EIO; 19391da177e4SLinus Torvalds } 19401da177e4SLinus Torvalds 19411da177e4SLinus Torvalds private->uses_cdl = 1; 19421da177e4SLinus Torvalds /* Check Track 0 for Compatible Disk Layout */ 19431da177e4SLinus Torvalds count_area = NULL; 19441da177e4SLinus Torvalds for (i = 0; i < 3; i++) { 19451da177e4SLinus Torvalds if (private->count_area[i].kl != 4 || 19463bc9fef9SStefan Haberland private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 || 19473bc9fef9SStefan Haberland private->count_area[i].cyl != 0 || 19483bc9fef9SStefan Haberland private->count_area[i].head != count_area_head[i] || 19493bc9fef9SStefan Haberland private->count_area[i].record != count_area_rec[i]) { 19501da177e4SLinus Torvalds private->uses_cdl = 0; 19511da177e4SLinus Torvalds break; 19521da177e4SLinus Torvalds } 19531da177e4SLinus Torvalds } 19541da177e4SLinus Torvalds if (i == 3) 19551da177e4SLinus Torvalds count_area = &private->count_area[4]; 19561da177e4SLinus Torvalds 19571da177e4SLinus Torvalds if (private->uses_cdl == 0) { 19581da177e4SLinus Torvalds for (i = 0; i < 5; i++) { 19591da177e4SLinus Torvalds if ((private->count_area[i].kl != 0) || 19601da177e4SLinus Torvalds (private->count_area[i].dl != 19613bc9fef9SStefan Haberland private->count_area[0].dl) || 19623bc9fef9SStefan Haberland private->count_area[i].cyl != 0 || 19633bc9fef9SStefan Haberland private->count_area[i].head != count_area_head[i] || 19643bc9fef9SStefan Haberland private->count_area[i].record != count_area_rec[i]) 19651da177e4SLinus Torvalds break; 19661da177e4SLinus Torvalds } 19671da177e4SLinus Torvalds if (i == 5) 19681da177e4SLinus Torvalds count_area = &private->count_area[0]; 19691da177e4SLinus Torvalds } else { 19701da177e4SLinus Torvalds if (private->count_area[3].record == 1) 1971fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1972fc19f381SStefan Haberland "Track 0 has no records following the VTOC\n"); 19731da177e4SLinus Torvalds } 1974e4dbb0f2SStefan Haberland 19751da177e4SLinus Torvalds if (count_area != NULL && count_area->kl == 0) { 19761da177e4SLinus Torvalds /* we found notthing violating our disk layout */ 19771da177e4SLinus Torvalds if (dasd_check_blocksize(count_area->dl) == 0) 19788e09f215SStefan Weinhuber block->bp_block = count_area->dl; 19791da177e4SLinus Torvalds } 19808e09f215SStefan Weinhuber if (block->bp_block == 0) { 1981fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1982fc19f381SStefan Haberland "The disk layout of the DASD is not supported\n"); 19831da177e4SLinus Torvalds return -EMEDIUMTYPE; 19841da177e4SLinus Torvalds } 19858e09f215SStefan Weinhuber block->s2b_shift = 0; /* bits to shift 512 to get a block */ 19868e09f215SStefan Weinhuber for (sb = 512; sb < block->bp_block; sb = sb << 1) 19878e09f215SStefan Weinhuber block->s2b_shift++; 19881da177e4SLinus Torvalds 19898e09f215SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 1990e4dbb0f2SStefan Haberland 1991e4dbb0f2SStefan Haberland raw: 1992b44b0ab3SStefan Weinhuber block->blocks = (private->real_cyl * 19931da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 19941da177e4SLinus Torvalds blk_per_trk); 19951da177e4SLinus Torvalds 1996fc19f381SStefan Haberland dev_info(&device->cdev->dev, 1997fc19f381SStefan Haberland "DASD with %d KB/block, %d KB total size, %d KB/track, " 1998fc19f381SStefan Haberland "%s\n", (block->bp_block >> 10), 1999b44b0ab3SStefan Weinhuber ((private->real_cyl * 20001da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 20018e09f215SStefan Weinhuber blk_per_trk * (block->bp_block >> 9)) >> 1), 20028e09f215SStefan Weinhuber ((blk_per_trk * block->bp_block) >> 10), 20031da177e4SLinus Torvalds private->uses_cdl ? 20041da177e4SLinus Torvalds "compatible disk layout" : "linux disk layout"); 20051da177e4SLinus Torvalds 20061da177e4SLinus Torvalds return 0; 20071da177e4SLinus Torvalds } 20081da177e4SLinus Torvalds 20098e09f215SStefan Weinhuber static int dasd_eckd_do_analysis(struct dasd_block *block) 20101da177e4SLinus Torvalds { 20111da177e4SLinus Torvalds struct dasd_eckd_private *private; 20121da177e4SLinus Torvalds 20138e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 20141da177e4SLinus Torvalds if (private->init_cqr_status < 0) 20158e09f215SStefan Weinhuber return dasd_eckd_start_analysis(block); 20161da177e4SLinus Torvalds else 20178e09f215SStefan Weinhuber return dasd_eckd_end_analysis(block); 20181da177e4SLinus Torvalds } 20191da177e4SLinus Torvalds 20208e09f215SStefan Weinhuber static int dasd_eckd_ready_to_online(struct dasd_device *device) 20218e09f215SStefan Weinhuber { 20228e09f215SStefan Weinhuber return dasd_alias_add_device(device); 20238e09f215SStefan Weinhuber }; 20248e09f215SStefan Weinhuber 20258e09f215SStefan Weinhuber static int dasd_eckd_online_to_ready(struct dasd_device *device) 20268e09f215SStefan Weinhuber { 2027501183f2SStefan Haberland cancel_work_sync(&device->reload_device); 202825e2cf1cSStefan Haberland cancel_work_sync(&device->kick_validate); 20298e09f215SStefan Weinhuber return dasd_alias_remove_device(device); 20308e09f215SStefan Weinhuber }; 20318e09f215SStefan Weinhuber 20321da177e4SLinus Torvalds static int 20338e09f215SStefan Weinhuber dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 20341da177e4SLinus Torvalds { 20351da177e4SLinus Torvalds struct dasd_eckd_private *private; 20361da177e4SLinus Torvalds 20378e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 20388e09f215SStefan Weinhuber if (dasd_check_blocksize(block->bp_block) == 0) { 20391da177e4SLinus Torvalds geo->sectors = recs_per_track(&private->rdc_data, 20408e09f215SStefan Weinhuber 0, block->bp_block); 20411da177e4SLinus Torvalds } 20421da177e4SLinus Torvalds geo->cylinders = private->rdc_data.no_cyl; 20431da177e4SLinus Torvalds geo->heads = private->rdc_data.trk_per_cyl; 20441da177e4SLinus Torvalds return 0; 20451da177e4SLinus Torvalds } 20461da177e4SLinus Torvalds 20471da177e4SLinus Torvalds static struct dasd_ccw_req * 20481da177e4SLinus Torvalds dasd_eckd_format_device(struct dasd_device * device, 20491da177e4SLinus Torvalds struct format_data_t * fdata) 20501da177e4SLinus Torvalds { 20511da177e4SLinus Torvalds struct dasd_eckd_private *private; 20521da177e4SLinus Torvalds struct dasd_ccw_req *fcp; 20531da177e4SLinus Torvalds struct eckd_count *ect; 20541da177e4SLinus Torvalds struct ccw1 *ccw; 20551da177e4SLinus Torvalds void *data; 2056b44b0ab3SStefan Weinhuber int rpt; 2057b44b0ab3SStefan Weinhuber struct ch_t address; 20581da177e4SLinus Torvalds int cplength, datasize; 20591da177e4SLinus Torvalds int i; 2060f9a28f7bSJean-Baptiste Joret int intensity = 0; 2061f9a28f7bSJean-Baptiste Joret int r0_perm; 20621da177e4SLinus Torvalds 20631da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 20641da177e4SLinus Torvalds rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize); 2065b44b0ab3SStefan Weinhuber set_ch_t(&address, 2066b44b0ab3SStefan Weinhuber fdata->start_unit / private->rdc_data.trk_per_cyl, 2067b44b0ab3SStefan Weinhuber fdata->start_unit % private->rdc_data.trk_per_cyl); 20681da177e4SLinus Torvalds 20691da177e4SLinus Torvalds /* Sanity checks. */ 20701da177e4SLinus Torvalds if (fdata->start_unit >= 2071b44b0ab3SStefan Weinhuber (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2072fc19f381SStefan Haberland dev_warn(&device->cdev->dev, "Start track number %d used in " 2073fc19f381SStefan Haberland "formatting is too big\n", fdata->start_unit); 20741da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 20751da177e4SLinus Torvalds } 20761da177e4SLinus Torvalds if (fdata->start_unit > fdata->stop_unit) { 2077fc19f381SStefan Haberland dev_warn(&device->cdev->dev, "Start track %d used in " 2078fc19f381SStefan Haberland "formatting exceeds end track\n", fdata->start_unit); 20791da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 20801da177e4SLinus Torvalds } 20811da177e4SLinus Torvalds if (dasd_check_blocksize(fdata->blksize) != 0) { 2082fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 2083fc19f381SStefan Haberland "The DASD cannot be formatted with block size %d\n", 20841da177e4SLinus Torvalds fdata->blksize); 20851da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 20861da177e4SLinus Torvalds } 20871da177e4SLinus Torvalds 20881da177e4SLinus Torvalds /* 20891da177e4SLinus Torvalds * fdata->intensity is a bit string that tells us what to do: 20901da177e4SLinus Torvalds * Bit 0: write record zero 20911da177e4SLinus Torvalds * Bit 1: write home address, currently not supported 20921da177e4SLinus Torvalds * Bit 2: invalidate tracks 20931da177e4SLinus Torvalds * Bit 3: use OS/390 compatible disk layout (cdl) 2094f9a28f7bSJean-Baptiste Joret * Bit 4: do not allow storage subsystem to modify record zero 20951da177e4SLinus Torvalds * Only some bit combinations do make sense. 20961da177e4SLinus Torvalds */ 2097f9a28f7bSJean-Baptiste Joret if (fdata->intensity & 0x10) { 2098f9a28f7bSJean-Baptiste Joret r0_perm = 0; 2099f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity & ~0x10; 2100f9a28f7bSJean-Baptiste Joret } else { 2101f9a28f7bSJean-Baptiste Joret r0_perm = 1; 2102f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity; 2103f9a28f7bSJean-Baptiste Joret } 2104f9a28f7bSJean-Baptiste Joret switch (intensity) { 21051da177e4SLinus Torvalds case 0x00: /* Normal format */ 21061da177e4SLinus Torvalds case 0x08: /* Normal format, use cdl. */ 21071da177e4SLinus Torvalds cplength = 2 + rpt; 21081da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 21091da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 21101da177e4SLinus Torvalds rpt * sizeof(struct eckd_count); 21111da177e4SLinus Torvalds break; 21121da177e4SLinus Torvalds case 0x01: /* Write record zero and format track. */ 21131da177e4SLinus Torvalds case 0x09: /* Write record zero and format track, use cdl. */ 21141da177e4SLinus Torvalds cplength = 3 + rpt; 21151da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 21161da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 21171da177e4SLinus Torvalds sizeof(struct eckd_count) + 21181da177e4SLinus Torvalds rpt * sizeof(struct eckd_count); 21191da177e4SLinus Torvalds break; 21201da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 21211da177e4SLinus Torvalds case 0x0c: /* Invalidate track, use cdl. */ 21221da177e4SLinus Torvalds cplength = 3; 21231da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 21241da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 21251da177e4SLinus Torvalds sizeof(struct eckd_count); 21261da177e4SLinus Torvalds break; 21271da177e4SLinus Torvalds default: 2128fc19f381SStefan Haberland dev_warn(&device->cdev->dev, "An I/O control call used " 2129fc19f381SStefan Haberland "incorrect flags 0x%x\n", fdata->intensity); 21301da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 21311da177e4SLinus Torvalds } 21321da177e4SLinus Torvalds /* Allocate the format ccw request. */ 213368b781feSStefan Haberland fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 21341da177e4SLinus Torvalds if (IS_ERR(fcp)) 21351da177e4SLinus Torvalds return fcp; 21361da177e4SLinus Torvalds 21371da177e4SLinus Torvalds data = fcp->data; 21381da177e4SLinus Torvalds ccw = fcp->cpaddr; 21391da177e4SLinus Torvalds 2140f9a28f7bSJean-Baptiste Joret switch (intensity & ~0x08) { 21411da177e4SLinus Torvalds case 0x00: /* Normal format. */ 21421da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 21431da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 21441da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device); 2145f9a28f7bSJean-Baptiste Joret /* grant subsystem permission to format R0 */ 2146f9a28f7bSJean-Baptiste Joret if (r0_perm) 2147f9a28f7bSJean-Baptiste Joret ((struct DE_eckd_data *)data)->ga_extended |= 0x04; 21481da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 21491da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 21501da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 21511da177e4SLinus Torvalds fdata->start_unit, 0, rpt, 21521da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device, 21531da177e4SLinus Torvalds fdata->blksize); 21541da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 21551da177e4SLinus Torvalds break; 21561da177e4SLinus Torvalds case 0x01: /* Write record zero + format track. */ 21571da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 21581da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 21591da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, 21601da177e4SLinus Torvalds device); 21611da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 21621da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 21631da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 21641da177e4SLinus Torvalds fdata->start_unit, 0, rpt + 1, 21651da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, device, 21668e09f215SStefan Weinhuber device->block->bp_block); 21671da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 21681da177e4SLinus Torvalds break; 21691da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 21701da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 21711da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 21721da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device); 21731da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 21741da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 21751da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 21761da177e4SLinus Torvalds fdata->start_unit, 0, 1, 21771da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device, 8); 21781da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 21791da177e4SLinus Torvalds break; 21801da177e4SLinus Torvalds } 2181f9a28f7bSJean-Baptiste Joret if (intensity & 0x01) { /* write record zero */ 21821da177e4SLinus Torvalds ect = (struct eckd_count *) data; 21831da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2184b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2185b44b0ab3SStefan Weinhuber ect->head = address.head; 21861da177e4SLinus Torvalds ect->record = 0; 21871da177e4SLinus Torvalds ect->kl = 0; 21881da177e4SLinus Torvalds ect->dl = 8; 21891da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 21901da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 21911da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 21921da177e4SLinus Torvalds ccw->count = 8; 21931da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 21941da177e4SLinus Torvalds ccw++; 21951da177e4SLinus Torvalds } 2196f9a28f7bSJean-Baptiste Joret if ((intensity & ~0x08) & 0x04) { /* erase track */ 21971da177e4SLinus Torvalds ect = (struct eckd_count *) data; 21981da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2199b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2200b44b0ab3SStefan Weinhuber ect->head = address.head; 22011da177e4SLinus Torvalds ect->record = 1; 22021da177e4SLinus Torvalds ect->kl = 0; 22031da177e4SLinus Torvalds ect->dl = 0; 22041da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 22051da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 22061da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 22071da177e4SLinus Torvalds ccw->count = 8; 22081da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 22091da177e4SLinus Torvalds } else { /* write remaining records */ 22101da177e4SLinus Torvalds for (i = 0; i < rpt; i++) { 22111da177e4SLinus Torvalds ect = (struct eckd_count *) data; 22121da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2213b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2214b44b0ab3SStefan Weinhuber ect->head = address.head; 22151da177e4SLinus Torvalds ect->record = i + 1; 22161da177e4SLinus Torvalds ect->kl = 0; 22171da177e4SLinus Torvalds ect->dl = fdata->blksize; 22181da177e4SLinus Torvalds /* Check for special tracks 0-1 when formatting CDL */ 2219f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 22201da177e4SLinus Torvalds fdata->start_unit == 0) { 22211da177e4SLinus Torvalds if (i < 3) { 22221da177e4SLinus Torvalds ect->kl = 4; 22231da177e4SLinus Torvalds ect->dl = sizes_trk0[i] - 4; 22241da177e4SLinus Torvalds } 22251da177e4SLinus Torvalds } 2226f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 22271da177e4SLinus Torvalds fdata->start_unit == 1) { 22281da177e4SLinus Torvalds ect->kl = 44; 22291da177e4SLinus Torvalds ect->dl = LABEL_SIZE - 44; 22301da177e4SLinus Torvalds } 22311da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 22321da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 22331da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 22341da177e4SLinus Torvalds ccw->count = 8; 22351da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 22361da177e4SLinus Torvalds ccw++; 22371da177e4SLinus Torvalds } 22381da177e4SLinus Torvalds } 22398e09f215SStefan Weinhuber fcp->startdev = device; 22408e09f215SStefan Weinhuber fcp->memdev = device; 2241eb6e199bSStefan Weinhuber fcp->retries = 256; 22421da177e4SLinus Torvalds fcp->buildclk = get_clock(); 22431da177e4SLinus Torvalds fcp->status = DASD_CQR_FILLED; 22441da177e4SLinus Torvalds return fcp; 22451da177e4SLinus Torvalds } 22461da177e4SLinus Torvalds 22478e09f215SStefan Weinhuber static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 22481da177e4SLinus Torvalds { 22498e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 22508e09f215SStefan Weinhuber if (cqr->block && (cqr->startdev != cqr->block->base)) { 22518e09f215SStefan Weinhuber dasd_eckd_reset_ccw_to_base_io(cqr); 22528e09f215SStefan Weinhuber cqr->startdev = cqr->block->base; 2253a4d26c6aSStefan Weinhuber cqr->lpm = cqr->block->base->path_data.opm; 22541da177e4SLinus Torvalds } 22558e09f215SStefan Weinhuber }; 22561da177e4SLinus Torvalds 22571da177e4SLinus Torvalds static dasd_erp_fn_t 22581da177e4SLinus Torvalds dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 22591da177e4SLinus Torvalds { 22608e09f215SStefan Weinhuber struct dasd_device *device = (struct dasd_device *) cqr->startdev; 22611da177e4SLinus Torvalds struct ccw_device *cdev = device->cdev; 22621da177e4SLinus Torvalds 22631da177e4SLinus Torvalds switch (cdev->id.cu_type) { 22641da177e4SLinus Torvalds case 0x3990: 22651da177e4SLinus Torvalds case 0x2105: 22661da177e4SLinus Torvalds case 0x2107: 22671da177e4SLinus Torvalds case 0x1750: 22681da177e4SLinus Torvalds return dasd_3990_erp_action; 22691da177e4SLinus Torvalds case 0x9343: 22701da177e4SLinus Torvalds case 0x3880: 22711da177e4SLinus Torvalds default: 22721da177e4SLinus Torvalds return dasd_default_erp_action; 22731da177e4SLinus Torvalds } 22741da177e4SLinus Torvalds } 22751da177e4SLinus Torvalds 22761da177e4SLinus Torvalds static dasd_erp_fn_t 22771da177e4SLinus Torvalds dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 22781da177e4SLinus Torvalds { 22791da177e4SLinus Torvalds return dasd_default_erp_postaction; 22801da177e4SLinus Torvalds } 22811da177e4SLinus Torvalds 22825a27e60dSStefan Weinhuber static void dasd_eckd_check_for_device_change(struct dasd_device *device, 22835a27e60dSStefan Weinhuber struct dasd_ccw_req *cqr, 22848e09f215SStefan Weinhuber struct irb *irb) 22858e09f215SStefan Weinhuber { 22868e09f215SStefan Weinhuber char mask; 2287f3eb5384SStefan Weinhuber char *sense = NULL; 2288501183f2SStefan Haberland struct dasd_eckd_private *private; 22898e09f215SStefan Weinhuber 2290501183f2SStefan Haberland private = (struct dasd_eckd_private *) device->private; 22918e09f215SStefan Weinhuber /* first of all check for state change pending interrupt */ 22928e09f215SStefan Weinhuber mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 2293f3eb5384SStefan Weinhuber if ((scsw_dstat(&irb->scsw) & mask) == mask) { 2294c8d1c0ffSStefan Haberland /* 2295c8d1c0ffSStefan Haberland * for alias only, not in offline processing 2296c8d1c0ffSStefan Haberland * and only if not suspended 2297c8d1c0ffSStefan Haberland */ 2298501183f2SStefan Haberland if (!device->block && private->lcu && 229925e2cf1cSStefan Haberland device->state == DASD_STATE_ONLINE && 2300c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_OFFLINE, &device->flags) && 2301c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 2302501183f2SStefan Haberland /* 2303501183f2SStefan Haberland * the state change could be caused by an alias 2304501183f2SStefan Haberland * reassignment remove device from alias handling 2305501183f2SStefan Haberland * to prevent new requests from being scheduled on 2306501183f2SStefan Haberland * the wrong alias device 2307501183f2SStefan Haberland */ 2308501183f2SStefan Haberland dasd_alias_remove_device(device); 2309501183f2SStefan Haberland 2310501183f2SStefan Haberland /* schedule worker to reload device */ 2311501183f2SStefan Haberland dasd_reload_device(device); 2312501183f2SStefan Haberland } 23138e09f215SStefan Weinhuber dasd_generic_handle_state_change(device); 23148e09f215SStefan Weinhuber return; 23158e09f215SStefan Weinhuber } 23168e09f215SStefan Weinhuber 2317a5a0061fSStefan Weinhuber sense = dasd_get_sense(irb); 23185a27e60dSStefan Weinhuber if (!sense) 23195a27e60dSStefan Weinhuber return; 23205a27e60dSStefan Weinhuber 23215a27e60dSStefan Weinhuber /* summary unit check */ 2322c7a29e56SStefan Weinhuber if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) && 2323a5a0061fSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { 23248e09f215SStefan Weinhuber dasd_alias_handle_summary_unit_check(device, irb); 23258e09f215SStefan Weinhuber return; 23268e09f215SStefan Weinhuber } 23278e09f215SStefan Weinhuber 2328f60c768cSStefan Haberland /* service information message SIM */ 23295a27e60dSStefan Weinhuber if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && 2330f3eb5384SStefan Weinhuber ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 2331f3eb5384SStefan Weinhuber dasd_3990_erp_handle_sim(device, sense); 2332f60c768cSStefan Haberland return; 2333f60c768cSStefan Haberland } 2334f60c768cSStefan Haberland 23355a27e60dSStefan Weinhuber /* loss of device reservation is handled via base devices only 23365a27e60dSStefan Weinhuber * as alias devices may be used with several bases 23375a27e60dSStefan Weinhuber */ 2338c7a29e56SStefan Weinhuber if (device->block && (sense[27] & DASD_SENSE_BIT_0) && 2339c7a29e56SStefan Weinhuber (sense[7] == 0x3F) && 23405a27e60dSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && 23415a27e60dSStefan Weinhuber test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { 23425a27e60dSStefan Weinhuber if (device->features & DASD_FEATURE_FAILONSLCK) 23435a27e60dSStefan Weinhuber set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); 23445a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 23455a27e60dSStefan Weinhuber dev_err(&device->cdev->dev, 23465a27e60dSStefan Weinhuber "The device reservation was lost\n"); 2347ada3df91SStefan Haberland } 23485a27e60dSStefan Weinhuber } 2349f3eb5384SStefan Weinhuber 2350f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( 2351f3eb5384SStefan Weinhuber struct dasd_device *startdev, 23528e09f215SStefan Weinhuber struct dasd_block *block, 2353f3eb5384SStefan Weinhuber struct request *req, 2354f3eb5384SStefan Weinhuber sector_t first_rec, 2355f3eb5384SStefan Weinhuber sector_t last_rec, 2356f3eb5384SStefan Weinhuber sector_t first_trk, 2357f3eb5384SStefan Weinhuber sector_t last_trk, 2358f3eb5384SStefan Weinhuber unsigned int first_offs, 2359f3eb5384SStefan Weinhuber unsigned int last_offs, 2360f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 2361f3eb5384SStefan Weinhuber unsigned int blksize) 23621da177e4SLinus Torvalds { 23631da177e4SLinus Torvalds struct dasd_eckd_private *private; 23641da177e4SLinus Torvalds unsigned long *idaws; 23651da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 23661da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 23671da177e4SLinus Torvalds struct ccw1 *ccw; 23685705f702SNeilBrown struct req_iterator iter; 23691da177e4SLinus Torvalds struct bio_vec *bv; 23701da177e4SLinus Torvalds char *dst; 2371f3eb5384SStefan Weinhuber unsigned int off; 23721da177e4SLinus Torvalds int count, cidaw, cplength, datasize; 2373f3eb5384SStefan Weinhuber sector_t recid; 23741da177e4SLinus Torvalds unsigned char cmd, rcmd; 23758e09f215SStefan Weinhuber int use_prefix; 23768e09f215SStefan Weinhuber struct dasd_device *basedev; 23771da177e4SLinus Torvalds 23788e09f215SStefan Weinhuber basedev = block->base; 23798e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 23801da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 23811da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_READ_MT; 23821da177e4SLinus Torvalds else if (rq_data_dir(req) == WRITE) 23831da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_WRITE_MT; 23841da177e4SLinus Torvalds else 23851da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 2386f3eb5384SStefan Weinhuber 23871da177e4SLinus Torvalds /* Check struct bio and count the number of blocks for the request. */ 23881da177e4SLinus Torvalds count = 0; 23891da177e4SLinus Torvalds cidaw = 0; 23905705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 23911da177e4SLinus Torvalds if (bv->bv_len & (blksize - 1)) 23921da177e4SLinus Torvalds /* Eckd can only do full blocks. */ 23931da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 23948e09f215SStefan Weinhuber count += bv->bv_len >> (block->s2b_shift + 9); 2395347a8dc3SMartin Schwidefsky #if defined(CONFIG_64BIT) 23966c92e699SJens Axboe if (idal_is_needed (page_address(bv->bv_page), bv->bv_len)) 23978e09f215SStefan Weinhuber cidaw += bv->bv_len >> (block->s2b_shift + 9); 23981da177e4SLinus Torvalds #endif 23991da177e4SLinus Torvalds } 24001da177e4SLinus Torvalds /* Paranoia. */ 24011da177e4SLinus Torvalds if (count != last_rec - first_rec + 1) 24021da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 24038e09f215SStefan Weinhuber 24048e09f215SStefan Weinhuber /* use the prefix command if available */ 24058e09f215SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 24068e09f215SStefan Weinhuber if (use_prefix) { 24078e09f215SStefan Weinhuber /* 1x prefix + number of blocks */ 24088e09f215SStefan Weinhuber cplength = 2 + count; 24098e09f215SStefan Weinhuber /* 1x prefix + cidaws*sizeof(long) */ 24108e09f215SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 24118e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 24128e09f215SStefan Weinhuber cidaw * sizeof(unsigned long); 24138e09f215SStefan Weinhuber } else { 24141da177e4SLinus Torvalds /* 1x define extent + 1x locate record + number of blocks */ 24151da177e4SLinus Torvalds cplength = 2 + count; 24161da177e4SLinus Torvalds /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 24178e09f215SStefan Weinhuber datasize = sizeof(struct DE_eckd_data) + 24188e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 24191da177e4SLinus Torvalds cidaw * sizeof(unsigned long); 24208e09f215SStefan Weinhuber } 24211da177e4SLinus Torvalds /* Find out the number of additional locate record ccws for cdl. */ 24221da177e4SLinus Torvalds if (private->uses_cdl && first_rec < 2*blk_per_trk) { 24231da177e4SLinus Torvalds if (last_rec >= 2*blk_per_trk) 24241da177e4SLinus Torvalds count = 2*blk_per_trk - first_rec; 24251da177e4SLinus Torvalds cplength += count; 24261da177e4SLinus Torvalds datasize += count*sizeof(struct LO_eckd_data); 24271da177e4SLinus Torvalds } 24281da177e4SLinus Torvalds /* Allocate the ccw request. */ 242968b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 243068b781feSStefan Haberland startdev); 24311da177e4SLinus Torvalds if (IS_ERR(cqr)) 24321da177e4SLinus Torvalds return cqr; 24331da177e4SLinus Torvalds ccw = cqr->cpaddr; 24348e09f215SStefan Weinhuber /* First ccw is define extent or prefix. */ 24358e09f215SStefan Weinhuber if (use_prefix) { 24368e09f215SStefan Weinhuber if (prefix(ccw++, cqr->data, first_trk, 24378e09f215SStefan Weinhuber last_trk, cmd, basedev, startdev) == -EAGAIN) { 24388e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 24398e09f215SStefan Weinhuber * Try again later. 24408e09f215SStefan Weinhuber */ 24418e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2442d54853efSMartin Schwidefsky return ERR_PTR(-EAGAIN); 2443d54853efSMartin Schwidefsky } 24448e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 24458e09f215SStefan Weinhuber sizeof(struct PFX_eckd_data)); 24468e09f215SStefan Weinhuber } else { 24478e09f215SStefan Weinhuber if (define_extent(ccw++, cqr->data, first_trk, 2448b38f27e8SStefan Haberland last_trk, cmd, basedev) == -EAGAIN) { 24498e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 24508e09f215SStefan Weinhuber * Try again later. 24518e09f215SStefan Weinhuber */ 24528e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 24538e09f215SStefan Weinhuber return ERR_PTR(-EAGAIN); 24548e09f215SStefan Weinhuber } 24558e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 24568e09f215SStefan Weinhuber sizeof(struct DE_eckd_data)); 24578e09f215SStefan Weinhuber } 24581da177e4SLinus Torvalds /* Build locate_record+read/write/ccws. */ 24591da177e4SLinus Torvalds LO_data = (struct LO_eckd_data *) (idaws + cidaw); 24601da177e4SLinus Torvalds recid = first_rec; 24611da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 24621da177e4SLinus Torvalds /* Only standard blocks so there is just one locate record. */ 24631da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 24641da177e4SLinus Torvalds locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 24658e09f215SStefan Weinhuber last_rec - recid + 1, cmd, basedev, blksize); 24661da177e4SLinus Torvalds } 24675705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 24681da177e4SLinus Torvalds dst = page_address(bv->bv_page) + bv->bv_offset; 24691da177e4SLinus Torvalds if (dasd_page_cache) { 24701da177e4SLinus Torvalds char *copy = kmem_cache_alloc(dasd_page_cache, 2471441e143eSChristoph Lameter GFP_DMA | __GFP_NOWARN); 24721da177e4SLinus Torvalds if (copy && rq_data_dir(req) == WRITE) 24731da177e4SLinus Torvalds memcpy(copy + bv->bv_offset, dst, bv->bv_len); 24741da177e4SLinus Torvalds if (copy) 24751da177e4SLinus Torvalds dst = copy + bv->bv_offset; 24761da177e4SLinus Torvalds } 24771da177e4SLinus Torvalds for (off = 0; off < bv->bv_len; off += blksize) { 24781da177e4SLinus Torvalds sector_t trkid = recid; 24791da177e4SLinus Torvalds unsigned int recoffs = sector_div(trkid, blk_per_trk); 24801da177e4SLinus Torvalds rcmd = cmd; 24811da177e4SLinus Torvalds count = blksize; 24821da177e4SLinus Torvalds /* Locate record for cdl special block ? */ 24831da177e4SLinus Torvalds if (private->uses_cdl && recid < 2*blk_per_trk) { 24841da177e4SLinus Torvalds if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 24851da177e4SLinus Torvalds rcmd |= 0x8; 24861da177e4SLinus Torvalds count = dasd_eckd_cdl_reclen(recid); 2487ec5883abSHorst Hummel if (count < blksize && 2488ec5883abSHorst Hummel rq_data_dir(req) == READ) 24891da177e4SLinus Torvalds memset(dst + count, 0xe5, 24901da177e4SLinus Torvalds blksize - count); 24911da177e4SLinus Torvalds } 24921da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 24931da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 24941da177e4SLinus Torvalds trkid, recoffs + 1, 24958e09f215SStefan Weinhuber 1, rcmd, basedev, count); 24961da177e4SLinus Torvalds } 24971da177e4SLinus Torvalds /* Locate record for standard blocks ? */ 24981da177e4SLinus Torvalds if (private->uses_cdl && recid == 2*blk_per_trk) { 24991da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 25001da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 25011da177e4SLinus Torvalds trkid, recoffs + 1, 25021da177e4SLinus Torvalds last_rec - recid + 1, 25038e09f215SStefan Weinhuber cmd, basedev, count); 25041da177e4SLinus Torvalds } 25051da177e4SLinus Torvalds /* Read/write ccw. */ 25061da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 25071da177e4SLinus Torvalds ccw->cmd_code = rcmd; 25081da177e4SLinus Torvalds ccw->count = count; 25091da177e4SLinus Torvalds if (idal_is_needed(dst, blksize)) { 25101da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) idaws; 25111da177e4SLinus Torvalds ccw->flags = CCW_FLAG_IDA; 25121da177e4SLinus Torvalds idaws = idal_create_words(idaws, dst, blksize); 25131da177e4SLinus Torvalds } else { 25141da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) dst; 25151da177e4SLinus Torvalds ccw->flags = 0; 25161da177e4SLinus Torvalds } 25171da177e4SLinus Torvalds ccw++; 25181da177e4SLinus Torvalds dst += blksize; 25191da177e4SLinus Torvalds recid++; 25201da177e4SLinus Torvalds } 25211da177e4SLinus Torvalds } 252213de227bSHolger Smolinski if (blk_noretry_request(req) || 252313de227bSHolger Smolinski block->base->features & DASD_FEATURE_FAILFAST) 25241c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 25258e09f215SStefan Weinhuber cqr->startdev = startdev; 25268e09f215SStefan Weinhuber cqr->memdev = startdev; 25278e09f215SStefan Weinhuber cqr->block = block; 25287c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2529a4d26c6aSStefan Weinhuber cqr->lpm = startdev->path_data.ppm; 25301da177e4SLinus Torvalds cqr->retries = 256; 25311da177e4SLinus Torvalds cqr->buildclk = get_clock(); 25321da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 25331da177e4SLinus Torvalds return cqr; 25341da177e4SLinus Torvalds } 25351da177e4SLinus Torvalds 2536f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 2537f3eb5384SStefan Weinhuber struct dasd_device *startdev, 2538f3eb5384SStefan Weinhuber struct dasd_block *block, 2539f3eb5384SStefan Weinhuber struct request *req, 2540f3eb5384SStefan Weinhuber sector_t first_rec, 2541f3eb5384SStefan Weinhuber sector_t last_rec, 2542f3eb5384SStefan Weinhuber sector_t first_trk, 2543f3eb5384SStefan Weinhuber sector_t last_trk, 2544f3eb5384SStefan Weinhuber unsigned int first_offs, 2545f3eb5384SStefan Weinhuber unsigned int last_offs, 2546f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 2547f3eb5384SStefan Weinhuber unsigned int blksize) 2548f3eb5384SStefan Weinhuber { 2549f3eb5384SStefan Weinhuber unsigned long *idaws; 2550f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 2551f3eb5384SStefan Weinhuber struct ccw1 *ccw; 2552f3eb5384SStefan Weinhuber struct req_iterator iter; 2553f3eb5384SStefan Weinhuber struct bio_vec *bv; 2554f3eb5384SStefan Weinhuber char *dst, *idaw_dst; 2555f3eb5384SStefan Weinhuber unsigned int cidaw, cplength, datasize; 2556f3eb5384SStefan Weinhuber unsigned int tlf; 2557f3eb5384SStefan Weinhuber sector_t recid; 2558f3eb5384SStefan Weinhuber unsigned char cmd; 2559f3eb5384SStefan Weinhuber struct dasd_device *basedev; 2560f3eb5384SStefan Weinhuber unsigned int trkcount, count, count_to_trk_end; 2561f3eb5384SStefan Weinhuber unsigned int idaw_len, seg_len, part_len, len_to_track_end; 2562f3eb5384SStefan Weinhuber unsigned char new_track, end_idaw; 2563f3eb5384SStefan Weinhuber sector_t trkid; 2564f3eb5384SStefan Weinhuber unsigned int recoffs; 2565f3eb5384SStefan Weinhuber 2566f3eb5384SStefan Weinhuber basedev = block->base; 2567f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) 2568f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 2569f3eb5384SStefan Weinhuber else if (rq_data_dir(req) == WRITE) 2570f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 2571f3eb5384SStefan Weinhuber else 2572f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 2573f3eb5384SStefan Weinhuber 2574f3eb5384SStefan Weinhuber /* Track based I/O needs IDAWs for each page, and not just for 2575f3eb5384SStefan Weinhuber * 64 bit addresses. We need additional idals for pages 2576f3eb5384SStefan Weinhuber * that get filled from two tracks, so we use the number 2577f3eb5384SStefan Weinhuber * of records as upper limit. 2578f3eb5384SStefan Weinhuber */ 2579f3eb5384SStefan Weinhuber cidaw = last_rec - first_rec + 1; 2580f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 2581f3eb5384SStefan Weinhuber 2582f3eb5384SStefan Weinhuber /* 1x prefix + one read/write ccw per track */ 2583f3eb5384SStefan Weinhuber cplength = 1 + trkcount; 2584f3eb5384SStefan Weinhuber 2585f3eb5384SStefan Weinhuber /* on 31-bit we need space for two 32 bit addresses per page 2586f3eb5384SStefan Weinhuber * on 64-bit one 64 bit address 2587f3eb5384SStefan Weinhuber */ 2588f3eb5384SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 2589f3eb5384SStefan Weinhuber cidaw * sizeof(unsigned long long); 2590f3eb5384SStefan Weinhuber 2591f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 259268b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 259368b781feSStefan Haberland startdev); 2594f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 2595f3eb5384SStefan Weinhuber return cqr; 2596f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 2597f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 2598f3eb5384SStefan Weinhuber if (first_trk == last_trk) 2599f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 2600f3eb5384SStefan Weinhuber else 2601f3eb5384SStefan Weinhuber tlf = last_offs + 1; 2602f3eb5384SStefan Weinhuber tlf *= blksize; 2603f3eb5384SStefan Weinhuber 2604f3eb5384SStefan Weinhuber if (prefix_LRE(ccw++, cqr->data, first_trk, 2605f3eb5384SStefan Weinhuber last_trk, cmd, basedev, startdev, 2606f3eb5384SStefan Weinhuber 1 /* format */, first_offs + 1, 2607f3eb5384SStefan Weinhuber trkcount, blksize, 2608f3eb5384SStefan Weinhuber tlf) == -EAGAIN) { 2609f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 2610f3eb5384SStefan Weinhuber * Try again later. 2611f3eb5384SStefan Weinhuber */ 2612f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2613f3eb5384SStefan Weinhuber return ERR_PTR(-EAGAIN); 2614f3eb5384SStefan Weinhuber } 2615f3eb5384SStefan Weinhuber 2616f3eb5384SStefan Weinhuber /* 2617f3eb5384SStefan Weinhuber * The translation of request into ccw programs must meet the 2618f3eb5384SStefan Weinhuber * following conditions: 2619f3eb5384SStefan Weinhuber * - all idaws but the first and the last must address full pages 2620f3eb5384SStefan Weinhuber * (or 2K blocks on 31-bit) 2621f3eb5384SStefan Weinhuber * - the scope of a ccw and it's idal ends with the track boundaries 2622f3eb5384SStefan Weinhuber */ 2623f3eb5384SStefan Weinhuber idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); 2624f3eb5384SStefan Weinhuber recid = first_rec; 2625f3eb5384SStefan Weinhuber new_track = 1; 2626f3eb5384SStefan Weinhuber end_idaw = 0; 2627f3eb5384SStefan Weinhuber len_to_track_end = 0; 2628246ccea1SMartin Schwidefsky idaw_dst = NULL; 2629f3eb5384SStefan Weinhuber idaw_len = 0; 2630f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 2631f3eb5384SStefan Weinhuber dst = page_address(bv->bv_page) + bv->bv_offset; 2632f3eb5384SStefan Weinhuber seg_len = bv->bv_len; 2633f3eb5384SStefan Weinhuber while (seg_len) { 2634f3eb5384SStefan Weinhuber if (new_track) { 2635f3eb5384SStefan Weinhuber trkid = recid; 2636f3eb5384SStefan Weinhuber recoffs = sector_div(trkid, blk_per_trk); 2637f3eb5384SStefan Weinhuber count_to_trk_end = blk_per_trk - recoffs; 2638f3eb5384SStefan Weinhuber count = min((last_rec - recid + 1), 2639f3eb5384SStefan Weinhuber (sector_t)count_to_trk_end); 2640f3eb5384SStefan Weinhuber len_to_track_end = count * blksize; 2641f3eb5384SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 2642f3eb5384SStefan Weinhuber ccw->cmd_code = cmd; 2643f3eb5384SStefan Weinhuber ccw->count = len_to_track_end; 2644f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 2645f3eb5384SStefan Weinhuber ccw->flags = CCW_FLAG_IDA; 2646f3eb5384SStefan Weinhuber ccw++; 2647f3eb5384SStefan Weinhuber recid += count; 2648f3eb5384SStefan Weinhuber new_track = 0; 264952db45c3SStefan Weinhuber /* first idaw for a ccw may start anywhere */ 265052db45c3SStefan Weinhuber if (!idaw_dst) 265152db45c3SStefan Weinhuber idaw_dst = dst; 2652f3eb5384SStefan Weinhuber } 265352db45c3SStefan Weinhuber /* If we start a new idaw, we must make sure that it 265452db45c3SStefan Weinhuber * starts on an IDA_BLOCK_SIZE boundary. 2655f3eb5384SStefan Weinhuber * If we continue an idaw, we must make sure that the 2656f3eb5384SStefan Weinhuber * current segment begins where the so far accumulated 2657f3eb5384SStefan Weinhuber * idaw ends 2658f3eb5384SStefan Weinhuber */ 265952db45c3SStefan Weinhuber if (!idaw_dst) { 266052db45c3SStefan Weinhuber if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { 266152db45c3SStefan Weinhuber dasd_sfree_request(cqr, startdev); 266252db45c3SStefan Weinhuber return ERR_PTR(-ERANGE); 266352db45c3SStefan Weinhuber } else 2664f3eb5384SStefan Weinhuber idaw_dst = dst; 266552db45c3SStefan Weinhuber } 2666f3eb5384SStefan Weinhuber if ((idaw_dst + idaw_len) != dst) { 2667f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2668f3eb5384SStefan Weinhuber return ERR_PTR(-ERANGE); 2669f3eb5384SStefan Weinhuber } 2670f3eb5384SStefan Weinhuber part_len = min(seg_len, len_to_track_end); 2671f3eb5384SStefan Weinhuber seg_len -= part_len; 2672f3eb5384SStefan Weinhuber dst += part_len; 2673f3eb5384SStefan Weinhuber idaw_len += part_len; 2674f3eb5384SStefan Weinhuber len_to_track_end -= part_len; 2675f3eb5384SStefan Weinhuber /* collected memory area ends on an IDA_BLOCK border, 2676f3eb5384SStefan Weinhuber * -> create an idaw 2677f3eb5384SStefan Weinhuber * idal_create_words will handle cases where idaw_len 2678f3eb5384SStefan Weinhuber * is larger then IDA_BLOCK_SIZE 2679f3eb5384SStefan Weinhuber */ 2680f3eb5384SStefan Weinhuber if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) 2681f3eb5384SStefan Weinhuber end_idaw = 1; 2682f3eb5384SStefan Weinhuber /* We also need to end the idaw at track end */ 2683f3eb5384SStefan Weinhuber if (!len_to_track_end) { 2684f3eb5384SStefan Weinhuber new_track = 1; 2685f3eb5384SStefan Weinhuber end_idaw = 1; 2686f3eb5384SStefan Weinhuber } 2687f3eb5384SStefan Weinhuber if (end_idaw) { 2688f3eb5384SStefan Weinhuber idaws = idal_create_words(idaws, idaw_dst, 2689f3eb5384SStefan Weinhuber idaw_len); 2690246ccea1SMartin Schwidefsky idaw_dst = NULL; 2691f3eb5384SStefan Weinhuber idaw_len = 0; 2692f3eb5384SStefan Weinhuber end_idaw = 0; 2693f3eb5384SStefan Weinhuber } 2694f3eb5384SStefan Weinhuber } 2695f3eb5384SStefan Weinhuber } 2696f3eb5384SStefan Weinhuber 2697f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 2698f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 2699f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2700f3eb5384SStefan Weinhuber cqr->startdev = startdev; 2701f3eb5384SStefan Weinhuber cqr->memdev = startdev; 2702f3eb5384SStefan Weinhuber cqr->block = block; 27037c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2704a4d26c6aSStefan Weinhuber cqr->lpm = startdev->path_data.ppm; 2705f3eb5384SStefan Weinhuber cqr->retries = 256; 2706f3eb5384SStefan Weinhuber cqr->buildclk = get_clock(); 2707f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 2708f3eb5384SStefan Weinhuber return cqr; 2709f3eb5384SStefan Weinhuber } 2710f3eb5384SStefan Weinhuber 2711f3eb5384SStefan Weinhuber static int prepare_itcw(struct itcw *itcw, 2712f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 2713f3eb5384SStefan Weinhuber struct dasd_device *basedev, 2714f3eb5384SStefan Weinhuber struct dasd_device *startdev, 2715f3eb5384SStefan Weinhuber unsigned int rec_on_trk, int count, 2716f3eb5384SStefan Weinhuber unsigned int blksize, 2717f3eb5384SStefan Weinhuber unsigned int total_data_size, 2718f3eb5384SStefan Weinhuber unsigned int tlf, 2719f3eb5384SStefan Weinhuber unsigned int blk_per_trk) 2720f3eb5384SStefan Weinhuber { 2721f3eb5384SStefan Weinhuber struct PFX_eckd_data pfxdata; 2722f3eb5384SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 2723f3eb5384SStefan Weinhuber struct DE_eckd_data *dedata; 2724f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 2725f3eb5384SStefan Weinhuber struct dcw *dcw; 2726f3eb5384SStefan Weinhuber 2727f3eb5384SStefan Weinhuber u32 begcyl, endcyl; 2728f3eb5384SStefan Weinhuber u16 heads, beghead, endhead; 2729f3eb5384SStefan Weinhuber u8 pfx_cmd; 2730f3eb5384SStefan Weinhuber 2731f3eb5384SStefan Weinhuber int rc = 0; 2732f3eb5384SStefan Weinhuber int sector = 0; 2733f3eb5384SStefan Weinhuber int dn, d; 2734f3eb5384SStefan Weinhuber 2735f3eb5384SStefan Weinhuber 2736f3eb5384SStefan Weinhuber /* setup prefix data */ 2737f3eb5384SStefan Weinhuber basepriv = (struct dasd_eckd_private *) basedev->private; 2738f3eb5384SStefan Weinhuber startpriv = (struct dasd_eckd_private *) startdev->private; 2739f3eb5384SStefan Weinhuber dedata = &pfxdata.define_extent; 2740f3eb5384SStefan Weinhuber lredata = &pfxdata.locate_record; 2741f3eb5384SStefan Weinhuber 2742f3eb5384SStefan Weinhuber memset(&pfxdata, 0, sizeof(pfxdata)); 2743f3eb5384SStefan Weinhuber pfxdata.format = 1; /* PFX with LRE */ 2744f3eb5384SStefan Weinhuber pfxdata.base_address = basepriv->ned->unit_addr; 2745f3eb5384SStefan Weinhuber pfxdata.base_lss = basepriv->ned->ID; 2746f3eb5384SStefan Weinhuber pfxdata.validity.define_extent = 1; 2747f3eb5384SStefan Weinhuber 2748f3eb5384SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 2749f3eb5384SStefan Weinhuber if (startpriv->uid.type != UA_BASE_DEVICE) { 2750f3eb5384SStefan Weinhuber pfxdata.validity.verify_base = 1; 2751f3eb5384SStefan Weinhuber if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 2752f3eb5384SStefan Weinhuber pfxdata.validity.hyper_pav = 1; 2753f3eb5384SStefan Weinhuber } 2754f3eb5384SStefan Weinhuber 2755f3eb5384SStefan Weinhuber switch (cmd) { 2756f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 2757f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 2758f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 2759f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 2760f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 2761f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 2762f3eb5384SStefan Weinhuber lredata->operation.operation = 0x0C; 2763f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x01; 2764f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX_READ; 2765f3eb5384SStefan Weinhuber break; 2766f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 2767f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 2768f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 2769f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 2770f3eb5384SStefan Weinhuber rc = check_XRC_on_prefix(&pfxdata, basedev); 2771f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 2772f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 2773f3eb5384SStefan Weinhuber lredata->operation.operation = 0x3F; 2774f3eb5384SStefan Weinhuber lredata->extended_operation = 0x23; 2775f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x2; 2776f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX; 2777f3eb5384SStefan Weinhuber break; 2778f3eb5384SStefan Weinhuber default: 2779f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 2780f3eb5384SStefan Weinhuber "prepare itcw, unknown opcode 0x%x", cmd); 2781f3eb5384SStefan Weinhuber BUG(); 2782f3eb5384SStefan Weinhuber break; 2783f3eb5384SStefan Weinhuber } 2784f3eb5384SStefan Weinhuber if (rc) 2785f3eb5384SStefan Weinhuber return rc; 2786f3eb5384SStefan Weinhuber 2787f3eb5384SStefan Weinhuber dedata->attributes.mode = 0x3; /* ECKD */ 2788f3eb5384SStefan Weinhuber 2789f3eb5384SStefan Weinhuber heads = basepriv->rdc_data.trk_per_cyl; 2790f3eb5384SStefan Weinhuber begcyl = trk / heads; 2791f3eb5384SStefan Weinhuber beghead = trk % heads; 2792f3eb5384SStefan Weinhuber endcyl = totrk / heads; 2793f3eb5384SStefan Weinhuber endhead = totrk % heads; 2794f3eb5384SStefan Weinhuber 2795f3eb5384SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 2796f3eb5384SStefan Weinhuber if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 2797f3eb5384SStefan Weinhuber dedata->attributes.operation == DASD_SEQ_ACCESS) { 2798f3eb5384SStefan Weinhuber 2799f3eb5384SStefan Weinhuber if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 2800f3eb5384SStefan Weinhuber endcyl += basepriv->attrib.nr_cyl; 2801f3eb5384SStefan Weinhuber else 2802f3eb5384SStefan Weinhuber endcyl = (basepriv->real_cyl - 1); 2803f3eb5384SStefan Weinhuber } 2804f3eb5384SStefan Weinhuber 2805f3eb5384SStefan Weinhuber set_ch_t(&dedata->beg_ext, begcyl, beghead); 2806f3eb5384SStefan Weinhuber set_ch_t(&dedata->end_ext, endcyl, endhead); 2807f3eb5384SStefan Weinhuber 2808f3eb5384SStefan Weinhuber dedata->ep_format = 0x20; /* records per track is valid */ 2809f3eb5384SStefan Weinhuber dedata->ep_rec_per_track = blk_per_trk; 2810f3eb5384SStefan Weinhuber 2811f3eb5384SStefan Weinhuber if (rec_on_trk) { 2812f3eb5384SStefan Weinhuber switch (basepriv->rdc_data.dev_type) { 2813f3eb5384SStefan Weinhuber case 0x3390: 2814f3eb5384SStefan Weinhuber dn = ceil_quot(blksize + 6, 232); 2815f3eb5384SStefan Weinhuber d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); 2816f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 2817f3eb5384SStefan Weinhuber break; 2818f3eb5384SStefan Weinhuber case 0x3380: 2819f3eb5384SStefan Weinhuber d = 7 + ceil_quot(blksize + 12, 32); 2820f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 2821f3eb5384SStefan Weinhuber break; 2822f3eb5384SStefan Weinhuber } 2823f3eb5384SStefan Weinhuber } 2824f3eb5384SStefan Weinhuber 2825f3eb5384SStefan Weinhuber lredata->auxiliary.length_valid = 1; 2826f3eb5384SStefan Weinhuber lredata->auxiliary.length_scope = 1; 2827f3eb5384SStefan Weinhuber lredata->auxiliary.imbedded_ccw_valid = 1; 2828f3eb5384SStefan Weinhuber lredata->length = tlf; 2829f3eb5384SStefan Weinhuber lredata->imbedded_ccw = cmd; 2830f3eb5384SStefan Weinhuber lredata->count = count; 2831f3eb5384SStefan Weinhuber lredata->sector = sector; 2832f3eb5384SStefan Weinhuber set_ch_t(&lredata->seek_addr, begcyl, beghead); 2833f3eb5384SStefan Weinhuber lredata->search_arg.cyl = lredata->seek_addr.cyl; 2834f3eb5384SStefan Weinhuber lredata->search_arg.head = lredata->seek_addr.head; 2835f3eb5384SStefan Weinhuber lredata->search_arg.record = rec_on_trk; 2836f3eb5384SStefan Weinhuber 2837f3eb5384SStefan Weinhuber dcw = itcw_add_dcw(itcw, pfx_cmd, 0, 2838f3eb5384SStefan Weinhuber &pfxdata, sizeof(pfxdata), total_data_size); 2839364c18d8SHeiko Carstens return IS_ERR(dcw) ? PTR_ERR(dcw) : 0; 2840f3eb5384SStefan Weinhuber } 2841f3eb5384SStefan Weinhuber 2842f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 2843f3eb5384SStefan Weinhuber struct dasd_device *startdev, 2844f3eb5384SStefan Weinhuber struct dasd_block *block, 2845f3eb5384SStefan Weinhuber struct request *req, 2846f3eb5384SStefan Weinhuber sector_t first_rec, 2847f3eb5384SStefan Weinhuber sector_t last_rec, 2848f3eb5384SStefan Weinhuber sector_t first_trk, 2849f3eb5384SStefan Weinhuber sector_t last_trk, 2850f3eb5384SStefan Weinhuber unsigned int first_offs, 2851f3eb5384SStefan Weinhuber unsigned int last_offs, 2852f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 2853f3eb5384SStefan Weinhuber unsigned int blksize) 2854f3eb5384SStefan Weinhuber { 2855f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 2856f3eb5384SStefan Weinhuber struct req_iterator iter; 2857f3eb5384SStefan Weinhuber struct bio_vec *bv; 2858f3eb5384SStefan Weinhuber char *dst; 2859f3eb5384SStefan Weinhuber unsigned int trkcount, ctidaw; 2860f3eb5384SStefan Weinhuber unsigned char cmd; 2861f3eb5384SStefan Weinhuber struct dasd_device *basedev; 2862f3eb5384SStefan Weinhuber unsigned int tlf; 2863f3eb5384SStefan Weinhuber struct itcw *itcw; 2864f3eb5384SStefan Weinhuber struct tidaw *last_tidaw = NULL; 2865f3eb5384SStefan Weinhuber int itcw_op; 2866f3eb5384SStefan Weinhuber size_t itcw_size; 2867ef19298bSStefan Weinhuber u8 tidaw_flags; 2868ef19298bSStefan Weinhuber unsigned int seg_len, part_len, len_to_track_end; 2869ef19298bSStefan Weinhuber unsigned char new_track; 2870ef19298bSStefan Weinhuber sector_t recid, trkid; 2871ef19298bSStefan Weinhuber unsigned int offs; 2872ef19298bSStefan Weinhuber unsigned int count, count_to_trk_end; 2873cd10502bSJulia Lawall int ret; 2874f3eb5384SStefan Weinhuber 2875f3eb5384SStefan Weinhuber basedev = block->base; 2876f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) { 2877f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 2878f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_READ; 2879f3eb5384SStefan Weinhuber } else if (rq_data_dir(req) == WRITE) { 2880f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 2881f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_WRITE; 2882f3eb5384SStefan Weinhuber } else 2883f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 2884f3eb5384SStefan Weinhuber 2885f3eb5384SStefan Weinhuber /* trackbased I/O needs address all memory via TIDAWs, 2886f3eb5384SStefan Weinhuber * not just for 64 bit addresses. This allows us to map 2887f3eb5384SStefan Weinhuber * each segment directly to one tidaw. 2888ef19298bSStefan Weinhuber * In the case of write requests, additional tidaws may 2889ef19298bSStefan Weinhuber * be needed when a segment crosses a track boundary. 2890f3eb5384SStefan Weinhuber */ 2891f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 2892f3eb5384SStefan Weinhuber ctidaw = 0; 2893f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 2894f3eb5384SStefan Weinhuber ++ctidaw; 2895f3eb5384SStefan Weinhuber } 2896ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 2897ef19298bSStefan Weinhuber ctidaw += (last_trk - first_trk); 2898f3eb5384SStefan Weinhuber 2899f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 2900f3eb5384SStefan Weinhuber itcw_size = itcw_calc_size(0, ctidaw, 0); 290168b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 2902f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 2903f3eb5384SStefan Weinhuber return cqr; 2904f3eb5384SStefan Weinhuber 2905f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 2906f3eb5384SStefan Weinhuber if (first_trk == last_trk) 2907f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 2908f3eb5384SStefan Weinhuber else 2909f3eb5384SStefan Weinhuber tlf = last_offs + 1; 2910f3eb5384SStefan Weinhuber tlf *= blksize; 2911f3eb5384SStefan Weinhuber 2912f3eb5384SStefan Weinhuber itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); 2913ef19298bSStefan Weinhuber if (IS_ERR(itcw)) { 2914cd10502bSJulia Lawall ret = -EINVAL; 2915cd10502bSJulia Lawall goto out_error; 2916ef19298bSStefan Weinhuber } 2917f3eb5384SStefan Weinhuber cqr->cpaddr = itcw_get_tcw(itcw); 2918f3eb5384SStefan Weinhuber if (prepare_itcw(itcw, first_trk, last_trk, 2919f3eb5384SStefan Weinhuber cmd, basedev, startdev, 2920f3eb5384SStefan Weinhuber first_offs + 1, 2921f3eb5384SStefan Weinhuber trkcount, blksize, 2922f3eb5384SStefan Weinhuber (last_rec - first_rec + 1) * blksize, 2923f3eb5384SStefan Weinhuber tlf, blk_per_trk) == -EAGAIN) { 2924f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 2925f3eb5384SStefan Weinhuber * Try again later. 2926f3eb5384SStefan Weinhuber */ 2927cd10502bSJulia Lawall ret = -EAGAIN; 2928cd10502bSJulia Lawall goto out_error; 2929f3eb5384SStefan Weinhuber } 2930d54cddb6SHeiko Carstens len_to_track_end = 0; 2931f3eb5384SStefan Weinhuber /* 2932f3eb5384SStefan Weinhuber * A tidaw can address 4k of memory, but must not cross page boundaries 2933f3eb5384SStefan Weinhuber * We can let the block layer handle this by setting 2934f3eb5384SStefan Weinhuber * blk_queue_segment_boundary to page boundaries and 2935f3eb5384SStefan Weinhuber * blk_max_segment_size to page size when setting up the request queue. 2936ef19298bSStefan Weinhuber * For write requests, a TIDAW must not cross track boundaries, because 2937ef19298bSStefan Weinhuber * we have to set the CBC flag on the last tidaw for each track. 2938f3eb5384SStefan Weinhuber */ 2939ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) { 2940ef19298bSStefan Weinhuber new_track = 1; 2941ef19298bSStefan Weinhuber recid = first_rec; 2942f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 2943f3eb5384SStefan Weinhuber dst = page_address(bv->bv_page) + bv->bv_offset; 2944ef19298bSStefan Weinhuber seg_len = bv->bv_len; 2945ef19298bSStefan Weinhuber while (seg_len) { 2946ef19298bSStefan Weinhuber if (new_track) { 2947ef19298bSStefan Weinhuber trkid = recid; 2948ef19298bSStefan Weinhuber offs = sector_div(trkid, blk_per_trk); 2949ef19298bSStefan Weinhuber count_to_trk_end = blk_per_trk - offs; 2950ef19298bSStefan Weinhuber count = min((last_rec - recid + 1), 2951ef19298bSStefan Weinhuber (sector_t)count_to_trk_end); 2952ef19298bSStefan Weinhuber len_to_track_end = count * blksize; 2953ef19298bSStefan Weinhuber recid += count; 2954ef19298bSStefan Weinhuber new_track = 0; 2955f3eb5384SStefan Weinhuber } 2956ef19298bSStefan Weinhuber part_len = min(seg_len, len_to_track_end); 2957ef19298bSStefan Weinhuber seg_len -= part_len; 2958ef19298bSStefan Weinhuber len_to_track_end -= part_len; 2959ef19298bSStefan Weinhuber /* We need to end the tidaw at track end */ 2960ef19298bSStefan Weinhuber if (!len_to_track_end) { 2961ef19298bSStefan Weinhuber new_track = 1; 2962ef19298bSStefan Weinhuber tidaw_flags = TIDAW_FLAGS_INSERT_CBC; 2963ef19298bSStefan Weinhuber } else 2964ef19298bSStefan Weinhuber tidaw_flags = 0; 2965ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, 2966ef19298bSStefan Weinhuber dst, part_len); 2967cd10502bSJulia Lawall if (IS_ERR(last_tidaw)) { 2968cd10502bSJulia Lawall ret = -EINVAL; 2969cd10502bSJulia Lawall goto out_error; 2970cd10502bSJulia Lawall } 2971ef19298bSStefan Weinhuber dst += part_len; 2972ef19298bSStefan Weinhuber } 2973ef19298bSStefan Weinhuber } 2974ef19298bSStefan Weinhuber } else { 2975ef19298bSStefan Weinhuber rq_for_each_segment(bv, req, iter) { 2976ef19298bSStefan Weinhuber dst = page_address(bv->bv_page) + bv->bv_offset; 2977ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, 0x00, 2978ef19298bSStefan Weinhuber dst, bv->bv_len); 2979cd10502bSJulia Lawall if (IS_ERR(last_tidaw)) { 2980cd10502bSJulia Lawall ret = -EINVAL; 2981cd10502bSJulia Lawall goto out_error; 2982cd10502bSJulia Lawall } 2983ef19298bSStefan Weinhuber } 2984ef19298bSStefan Weinhuber } 2985ef19298bSStefan Weinhuber last_tidaw->flags |= TIDAW_FLAGS_LAST; 2986ef19298bSStefan Weinhuber last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; 2987f3eb5384SStefan Weinhuber itcw_finalize(itcw); 2988f3eb5384SStefan Weinhuber 2989f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 2990f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 2991f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2992ef19298bSStefan Weinhuber cqr->cpmode = 1; 2993f3eb5384SStefan Weinhuber cqr->startdev = startdev; 2994f3eb5384SStefan Weinhuber cqr->memdev = startdev; 2995f3eb5384SStefan Weinhuber cqr->block = block; 29967c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2997a4d26c6aSStefan Weinhuber cqr->lpm = startdev->path_data.ppm; 2998f3eb5384SStefan Weinhuber cqr->retries = 256; 2999f3eb5384SStefan Weinhuber cqr->buildclk = get_clock(); 3000f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 3001f3eb5384SStefan Weinhuber return cqr; 3002cd10502bSJulia Lawall out_error: 3003cd10502bSJulia Lawall dasd_sfree_request(cqr, startdev); 3004cd10502bSJulia Lawall return ERR_PTR(ret); 3005f3eb5384SStefan Weinhuber } 3006f3eb5384SStefan Weinhuber 3007f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 3008f3eb5384SStefan Weinhuber struct dasd_block *block, 3009f3eb5384SStefan Weinhuber struct request *req) 3010f3eb5384SStefan Weinhuber { 3011ef19298bSStefan Weinhuber int cmdrtd, cmdwtd; 3012f3eb5384SStefan Weinhuber int use_prefix; 3013ef19298bSStefan Weinhuber int fcx_multitrack; 301445b44d76SStefan Weinhuber struct dasd_eckd_private *private; 3015f3eb5384SStefan Weinhuber struct dasd_device *basedev; 3016f3eb5384SStefan Weinhuber sector_t first_rec, last_rec; 3017f3eb5384SStefan Weinhuber sector_t first_trk, last_trk; 3018f3eb5384SStefan Weinhuber unsigned int first_offs, last_offs; 3019f3eb5384SStefan Weinhuber unsigned int blk_per_trk, blksize; 3020f3eb5384SStefan Weinhuber int cdlspecial; 3021ef19298bSStefan Weinhuber unsigned int data_size; 3022f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 3023f3eb5384SStefan Weinhuber 3024f3eb5384SStefan Weinhuber basedev = block->base; 3025f3eb5384SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 3026f3eb5384SStefan Weinhuber 3027f3eb5384SStefan Weinhuber /* Calculate number of blocks/records per track. */ 3028f3eb5384SStefan Weinhuber blksize = block->bp_block; 3029f3eb5384SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 30306fca97a9SStefan Haberland if (blk_per_trk == 0) 30316fca97a9SStefan Haberland return ERR_PTR(-EINVAL); 3032f3eb5384SStefan Weinhuber /* Calculate record id of first and last block. */ 303383096ebfSTejun Heo first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; 3034f3eb5384SStefan Weinhuber first_offs = sector_div(first_trk, blk_per_trk); 3035f3eb5384SStefan Weinhuber last_rec = last_trk = 303683096ebfSTejun Heo (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 3037f3eb5384SStefan Weinhuber last_offs = sector_div(last_trk, blk_per_trk); 3038f3eb5384SStefan Weinhuber cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); 3039f3eb5384SStefan Weinhuber 3040ef19298bSStefan Weinhuber fcx_multitrack = private->features.feature[40] & 0x20; 3041ef19298bSStefan Weinhuber data_size = blk_rq_bytes(req); 3042ef19298bSStefan Weinhuber /* tpm write request add CBC data on each track boundary */ 3043ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 3044ef19298bSStefan Weinhuber data_size += (last_trk - first_trk) * 4; 3045f3eb5384SStefan Weinhuber 3046f3eb5384SStefan Weinhuber /* is read track data and write track data in command mode supported? */ 3047f3eb5384SStefan Weinhuber cmdrtd = private->features.feature[9] & 0x20; 3048f3eb5384SStefan Weinhuber cmdwtd = private->features.feature[12] & 0x40; 3049f3eb5384SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 3050f3eb5384SStefan Weinhuber 3051f3eb5384SStefan Weinhuber cqr = NULL; 3052f3eb5384SStefan Weinhuber if (cdlspecial || dasd_page_cache) { 3053f3eb5384SStefan Weinhuber /* do nothing, just fall through to the cmd mode single case */ 3054ef19298bSStefan Weinhuber } else if ((data_size <= private->fcx_max_data) 3055ef19298bSStefan Weinhuber && (fcx_multitrack || (first_trk == last_trk))) { 3056f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, 3057f3eb5384SStefan Weinhuber first_rec, last_rec, 3058f3eb5384SStefan Weinhuber first_trk, last_trk, 3059f3eb5384SStefan Weinhuber first_offs, last_offs, 3060f3eb5384SStefan Weinhuber blk_per_trk, blksize); 3061ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3062ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 3063f3eb5384SStefan Weinhuber cqr = NULL; 3064f3eb5384SStefan Weinhuber } else if (use_prefix && 3065f3eb5384SStefan Weinhuber (((rq_data_dir(req) == READ) && cmdrtd) || 3066f3eb5384SStefan Weinhuber ((rq_data_dir(req) == WRITE) && cmdwtd))) { 3067f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_track(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); 3072ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3073ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 3074f3eb5384SStefan Weinhuber cqr = NULL; 3075f3eb5384SStefan Weinhuber } 3076f3eb5384SStefan Weinhuber if (!cqr) 3077f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, 3078f3eb5384SStefan Weinhuber first_rec, last_rec, 3079f3eb5384SStefan Weinhuber first_trk, last_trk, 3080f3eb5384SStefan Weinhuber first_offs, last_offs, 3081f3eb5384SStefan Weinhuber blk_per_trk, blksize); 3082f3eb5384SStefan Weinhuber return cqr; 3083f3eb5384SStefan Weinhuber } 3084f3eb5384SStefan Weinhuber 3085e4dbb0f2SStefan Haberland static struct dasd_ccw_req *dasd_raw_build_cp(struct dasd_device *startdev, 3086e4dbb0f2SStefan Haberland struct dasd_block *block, 3087e4dbb0f2SStefan Haberland struct request *req) 3088e4dbb0f2SStefan Haberland { 3089e4dbb0f2SStefan Haberland unsigned long *idaws; 3090e4dbb0f2SStefan Haberland struct dasd_device *basedev; 3091e4dbb0f2SStefan Haberland struct dasd_ccw_req *cqr; 3092e4dbb0f2SStefan Haberland struct ccw1 *ccw; 3093e4dbb0f2SStefan Haberland struct req_iterator iter; 3094e4dbb0f2SStefan Haberland struct bio_vec *bv; 3095e4dbb0f2SStefan Haberland char *dst; 3096e4dbb0f2SStefan Haberland unsigned char cmd; 3097e4dbb0f2SStefan Haberland unsigned int trkcount; 3098e4dbb0f2SStefan Haberland unsigned int seg_len, len_to_track_end; 3099e4dbb0f2SStefan Haberland unsigned int first_offs; 3100e4dbb0f2SStefan Haberland unsigned int cidaw, cplength, datasize; 3101e4dbb0f2SStefan Haberland sector_t first_trk, last_trk; 3102e4dbb0f2SStefan Haberland unsigned int pfx_datasize; 3103e4dbb0f2SStefan Haberland 3104e4dbb0f2SStefan Haberland /* 3105e4dbb0f2SStefan Haberland * raw track access needs to be mutiple of 64k and on 64k boundary 3106e4dbb0f2SStefan Haberland */ 3107e4dbb0f2SStefan Haberland if ((blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK) != 0) { 3108e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EINVAL); 3109e4dbb0f2SStefan Haberland goto out; 3110e4dbb0f2SStefan Haberland } 3111e4dbb0f2SStefan Haberland if (((blk_rq_pos(req) + blk_rq_sectors(req)) % 3112e4dbb0f2SStefan Haberland DASD_RAW_SECTORS_PER_TRACK) != 0) { 3113e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EINVAL); 3114e4dbb0f2SStefan Haberland goto out; 3115e4dbb0f2SStefan Haberland } 3116e4dbb0f2SStefan Haberland 3117e4dbb0f2SStefan Haberland first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; 3118e4dbb0f2SStefan Haberland last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / 3119e4dbb0f2SStefan Haberland DASD_RAW_SECTORS_PER_TRACK; 3120e4dbb0f2SStefan Haberland trkcount = last_trk - first_trk + 1; 3121e4dbb0f2SStefan Haberland first_offs = 0; 3122e4dbb0f2SStefan Haberland basedev = block->base; 3123e4dbb0f2SStefan Haberland 3124e4dbb0f2SStefan Haberland if (rq_data_dir(req) == READ) 3125e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_READ_TRACK; 3126e4dbb0f2SStefan Haberland else if (rq_data_dir(req) == WRITE) 3127e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; 3128e4dbb0f2SStefan Haberland else { 3129e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EINVAL); 3130e4dbb0f2SStefan Haberland goto out; 3131e4dbb0f2SStefan Haberland } 3132e4dbb0f2SStefan Haberland 3133e4dbb0f2SStefan Haberland /* 3134e4dbb0f2SStefan Haberland * Raw track based I/O needs IDAWs for each page, 3135e4dbb0f2SStefan Haberland * and not just for 64 bit addresses. 3136e4dbb0f2SStefan Haberland */ 3137e4dbb0f2SStefan Haberland cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; 3138e4dbb0f2SStefan Haberland 3139e4dbb0f2SStefan Haberland /* 1x prefix + one read/write ccw per track */ 3140e4dbb0f2SStefan Haberland cplength = 1 + trkcount; 3141e4dbb0f2SStefan Haberland 3142e4dbb0f2SStefan Haberland /* 3143e4dbb0f2SStefan Haberland * struct PFX_eckd_data has up to 2 byte as extended parameter 3144e4dbb0f2SStefan Haberland * this is needed for write full track and has to be mentioned 314525985edcSLucas De Marchi * separately 3146e4dbb0f2SStefan Haberland * add 8 instead of 2 to keep 8 byte boundary 3147e4dbb0f2SStefan Haberland */ 3148e4dbb0f2SStefan Haberland pfx_datasize = sizeof(struct PFX_eckd_data) + 8; 3149e4dbb0f2SStefan Haberland 3150e4dbb0f2SStefan Haberland datasize = pfx_datasize + cidaw * sizeof(unsigned long long); 3151e4dbb0f2SStefan Haberland 3152e4dbb0f2SStefan Haberland /* Allocate the ccw request. */ 3153e4dbb0f2SStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 3154e4dbb0f2SStefan Haberland datasize, startdev); 3155e4dbb0f2SStefan Haberland if (IS_ERR(cqr)) 3156e4dbb0f2SStefan Haberland goto out; 3157e4dbb0f2SStefan Haberland ccw = cqr->cpaddr; 3158e4dbb0f2SStefan Haberland 3159e4dbb0f2SStefan Haberland if (prefix_LRE(ccw++, cqr->data, first_trk, last_trk, cmd, 3160e4dbb0f2SStefan Haberland basedev, startdev, 1 /* format */, first_offs + 1, 3161e4dbb0f2SStefan Haberland trkcount, 0, 0) == -EAGAIN) { 3162e4dbb0f2SStefan Haberland /* Clock not in sync and XRC is enabled. 3163e4dbb0f2SStefan Haberland * Try again later. 3164e4dbb0f2SStefan Haberland */ 3165e4dbb0f2SStefan Haberland dasd_sfree_request(cqr, startdev); 3166e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EAGAIN); 3167e4dbb0f2SStefan Haberland goto out; 3168e4dbb0f2SStefan Haberland } 3169e4dbb0f2SStefan Haberland 3170e4dbb0f2SStefan Haberland idaws = (unsigned long *)(cqr->data + pfx_datasize); 3171e4dbb0f2SStefan Haberland 3172e4dbb0f2SStefan Haberland len_to_track_end = 0; 3173e4dbb0f2SStefan Haberland 3174e4dbb0f2SStefan Haberland rq_for_each_segment(bv, req, iter) { 3175e4dbb0f2SStefan Haberland dst = page_address(bv->bv_page) + bv->bv_offset; 3176e4dbb0f2SStefan Haberland seg_len = bv->bv_len; 3177e4dbb0f2SStefan Haberland if (!len_to_track_end) { 3178e4dbb0f2SStefan Haberland ccw[-1].flags |= CCW_FLAG_CC; 3179e4dbb0f2SStefan Haberland ccw->cmd_code = cmd; 3180e4dbb0f2SStefan Haberland /* maximum 3390 track size */ 3181e4dbb0f2SStefan Haberland ccw->count = 57326; 3182e4dbb0f2SStefan Haberland /* 64k map to one track */ 3183e4dbb0f2SStefan Haberland len_to_track_end = 65536; 3184e4dbb0f2SStefan Haberland ccw->cda = (__u32)(addr_t)idaws; 3185e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_IDA; 3186e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 3187e4dbb0f2SStefan Haberland ccw++; 3188e4dbb0f2SStefan Haberland } 3189e4dbb0f2SStefan Haberland len_to_track_end -= seg_len; 3190e4dbb0f2SStefan Haberland idaws = idal_create_words(idaws, dst, seg_len); 3191e4dbb0f2SStefan Haberland } 3192e4dbb0f2SStefan Haberland 3193e4dbb0f2SStefan Haberland if (blk_noretry_request(req) || 3194e4dbb0f2SStefan Haberland block->base->features & DASD_FEATURE_FAILFAST) 3195e4dbb0f2SStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3196e4dbb0f2SStefan Haberland cqr->startdev = startdev; 3197e4dbb0f2SStefan Haberland cqr->memdev = startdev; 3198e4dbb0f2SStefan Haberland cqr->block = block; 3199e4dbb0f2SStefan Haberland cqr->expires = startdev->default_expires * HZ; 3200e4dbb0f2SStefan Haberland cqr->lpm = startdev->path_data.ppm; 3201e4dbb0f2SStefan Haberland cqr->retries = 256; 3202e4dbb0f2SStefan Haberland cqr->buildclk = get_clock(); 3203e4dbb0f2SStefan Haberland cqr->status = DASD_CQR_FILLED; 3204e4dbb0f2SStefan Haberland 3205e4dbb0f2SStefan Haberland if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN) 3206e4dbb0f2SStefan Haberland cqr = NULL; 3207e4dbb0f2SStefan Haberland out: 3208e4dbb0f2SStefan Haberland return cqr; 3209e4dbb0f2SStefan Haberland } 3210e4dbb0f2SStefan Haberland 3211e4dbb0f2SStefan Haberland 32121da177e4SLinus Torvalds static int 32131da177e4SLinus Torvalds dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 32141da177e4SLinus Torvalds { 32151da177e4SLinus Torvalds struct dasd_eckd_private *private; 32161da177e4SLinus Torvalds struct ccw1 *ccw; 32175705f702SNeilBrown struct req_iterator iter; 32181da177e4SLinus Torvalds struct bio_vec *bv; 32191da177e4SLinus Torvalds char *dst, *cda; 32201da177e4SLinus Torvalds unsigned int blksize, blk_per_trk, off; 32211da177e4SLinus Torvalds sector_t recid; 32225705f702SNeilBrown int status; 32231da177e4SLinus Torvalds 32241da177e4SLinus Torvalds if (!dasd_page_cache) 32251da177e4SLinus Torvalds goto out; 32268e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) cqr->block->base->private; 32278e09f215SStefan Weinhuber blksize = cqr->block->bp_block; 32281da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 322983096ebfSTejun Heo recid = blk_rq_pos(req) >> cqr->block->s2b_shift; 32301da177e4SLinus Torvalds ccw = cqr->cpaddr; 32311da177e4SLinus Torvalds /* Skip over define extent & locate record. */ 32321da177e4SLinus Torvalds ccw++; 32331da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 32341da177e4SLinus Torvalds ccw++; 32355705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 32361da177e4SLinus Torvalds dst = page_address(bv->bv_page) + bv->bv_offset; 32371da177e4SLinus Torvalds for (off = 0; off < bv->bv_len; off += blksize) { 32381da177e4SLinus Torvalds /* Skip locate record. */ 32391da177e4SLinus Torvalds if (private->uses_cdl && recid <= 2*blk_per_trk) 32401da177e4SLinus Torvalds ccw++; 32411da177e4SLinus Torvalds if (dst) { 32421da177e4SLinus Torvalds if (ccw->flags & CCW_FLAG_IDA) 32431da177e4SLinus Torvalds cda = *((char **)((addr_t) ccw->cda)); 32441da177e4SLinus Torvalds else 32451da177e4SLinus Torvalds cda = (char *)((addr_t) ccw->cda); 32461da177e4SLinus Torvalds if (dst != cda) { 32471da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 32481da177e4SLinus Torvalds memcpy(dst, cda, bv->bv_len); 32491da177e4SLinus Torvalds kmem_cache_free(dasd_page_cache, 32501da177e4SLinus Torvalds (void *)((addr_t)cda & PAGE_MASK)); 32511da177e4SLinus Torvalds } 32521da177e4SLinus Torvalds dst = NULL; 32531da177e4SLinus Torvalds } 32541da177e4SLinus Torvalds ccw++; 32551da177e4SLinus Torvalds recid++; 32561da177e4SLinus Torvalds } 32571da177e4SLinus Torvalds } 32581da177e4SLinus Torvalds out: 32591da177e4SLinus Torvalds status = cqr->status == DASD_CQR_DONE; 32608e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 32611da177e4SLinus Torvalds return status; 32621da177e4SLinus Torvalds } 32631da177e4SLinus Torvalds 32648e09f215SStefan Weinhuber /* 3265f3eb5384SStefan Weinhuber * Modify ccw/tcw in cqr so it can be started on a base device. 32668e09f215SStefan Weinhuber * 32678e09f215SStefan Weinhuber * Note that this is not enough to restart the cqr! 32688e09f215SStefan Weinhuber * Either reset cqr->startdev as well (summary unit check handling) 32698e09f215SStefan Weinhuber * or restart via separate cqr (as in ERP handling). 32708e09f215SStefan Weinhuber */ 32718e09f215SStefan Weinhuber void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 32728e09f215SStefan Weinhuber { 32738e09f215SStefan Weinhuber struct ccw1 *ccw; 32748e09f215SStefan Weinhuber struct PFX_eckd_data *pfxdata; 3275f3eb5384SStefan Weinhuber struct tcw *tcw; 3276f3eb5384SStefan Weinhuber struct tccb *tccb; 3277f3eb5384SStefan Weinhuber struct dcw *dcw; 32788e09f215SStefan Weinhuber 3279f3eb5384SStefan Weinhuber if (cqr->cpmode == 1) { 3280f3eb5384SStefan Weinhuber tcw = cqr->cpaddr; 3281f3eb5384SStefan Weinhuber tccb = tcw_get_tccb(tcw); 3282f3eb5384SStefan Weinhuber dcw = (struct dcw *)&tccb->tca[0]; 3283f3eb5384SStefan Weinhuber pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; 3284f3eb5384SStefan Weinhuber pfxdata->validity.verify_base = 0; 3285f3eb5384SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 3286f3eb5384SStefan Weinhuber } else { 32878e09f215SStefan Weinhuber ccw = cqr->cpaddr; 32888e09f215SStefan Weinhuber pfxdata = cqr->data; 32898e09f215SStefan Weinhuber if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 32908e09f215SStefan Weinhuber pfxdata->validity.verify_base = 0; 32918e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 32928e09f215SStefan Weinhuber } 32938e09f215SStefan Weinhuber } 3294f3eb5384SStefan Weinhuber } 32958e09f215SStefan Weinhuber 32968e09f215SStefan Weinhuber #define DASD_ECKD_CHANQ_MAX_SIZE 4 32978e09f215SStefan Weinhuber 32988e09f215SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 32998e09f215SStefan Weinhuber struct dasd_block *block, 33008e09f215SStefan Weinhuber struct request *req) 33018e09f215SStefan Weinhuber { 33028e09f215SStefan Weinhuber struct dasd_eckd_private *private; 33038e09f215SStefan Weinhuber struct dasd_device *startdev; 33048e09f215SStefan Weinhuber unsigned long flags; 33058e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 33068e09f215SStefan Weinhuber 33078e09f215SStefan Weinhuber startdev = dasd_alias_get_start_dev(base); 33088e09f215SStefan Weinhuber if (!startdev) 33098e09f215SStefan Weinhuber startdev = base; 33108e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) startdev->private; 33118e09f215SStefan Weinhuber if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 33128e09f215SStefan Weinhuber return ERR_PTR(-EBUSY); 33138e09f215SStefan Weinhuber 33148e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 33158e09f215SStefan Weinhuber private->count++; 3316e4dbb0f2SStefan Haberland if ((base->features & DASD_FEATURE_USERAW)) 3317e4dbb0f2SStefan Haberland cqr = dasd_raw_build_cp(startdev, block, req); 3318e4dbb0f2SStefan Haberland else 33198e09f215SStefan Weinhuber cqr = dasd_eckd_build_cp(startdev, block, req); 33208e09f215SStefan Weinhuber if (IS_ERR(cqr)) 33218e09f215SStefan Weinhuber private->count--; 33228e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 33238e09f215SStefan Weinhuber return cqr; 33248e09f215SStefan Weinhuber } 33258e09f215SStefan Weinhuber 33268e09f215SStefan Weinhuber static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 33278e09f215SStefan Weinhuber struct request *req) 33288e09f215SStefan Weinhuber { 33298e09f215SStefan Weinhuber struct dasd_eckd_private *private; 33308e09f215SStefan Weinhuber unsigned long flags; 33318e09f215SStefan Weinhuber 33328e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 33338e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) cqr->memdev->private; 33348e09f215SStefan Weinhuber private->count--; 33358e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 33368e09f215SStefan Weinhuber return dasd_eckd_free_cp(cqr, req); 33378e09f215SStefan Weinhuber } 33388e09f215SStefan Weinhuber 33391da177e4SLinus Torvalds static int 33401da177e4SLinus Torvalds dasd_eckd_fill_info(struct dasd_device * device, 33411da177e4SLinus Torvalds struct dasd_information2_t * info) 33421da177e4SLinus Torvalds { 33431da177e4SLinus Torvalds struct dasd_eckd_private *private; 33441da177e4SLinus Torvalds 33451da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 33461da177e4SLinus Torvalds info->label_block = 2; 33471da177e4SLinus Torvalds info->FBA_layout = private->uses_cdl ? 0 : 1; 33481da177e4SLinus Torvalds info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 33491da177e4SLinus Torvalds info->characteristics_size = sizeof(struct dasd_eckd_characteristics); 33501da177e4SLinus Torvalds memcpy(info->characteristics, &private->rdc_data, 33511da177e4SLinus Torvalds sizeof(struct dasd_eckd_characteristics)); 33524abb08c2SStefan Weinhuber info->confdata_size = min((unsigned long)private->conf_len, 33534abb08c2SStefan Weinhuber sizeof(info->configuration_data)); 33544abb08c2SStefan Weinhuber memcpy(info->configuration_data, private->conf_data, 33554abb08c2SStefan Weinhuber info->confdata_size); 33561da177e4SLinus Torvalds return 0; 33571da177e4SLinus Torvalds } 33581da177e4SLinus Torvalds 33591da177e4SLinus Torvalds /* 33601da177e4SLinus Torvalds * SECTION: ioctl functions for eckd devices. 33611da177e4SLinus Torvalds */ 33621da177e4SLinus Torvalds 33631da177e4SLinus Torvalds /* 33641da177e4SLinus Torvalds * Release device ioctl. 33651da177e4SLinus Torvalds * Buils a channel programm to releases a prior reserved 33661da177e4SLinus Torvalds * (see dasd_eckd_reserve) device. 33671da177e4SLinus Torvalds */ 33681da177e4SLinus Torvalds static int 33691107ccfbSChristoph Hellwig dasd_eckd_release(struct dasd_device *device) 33701da177e4SLinus Torvalds { 33711da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 33721da177e4SLinus Torvalds int rc; 3373f3eb5384SStefan Weinhuber struct ccw1 *ccw; 3374f932bceaSStefan Weinhuber int useglobal; 33751da177e4SLinus Torvalds 33761da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 33771da177e4SLinus Torvalds return -EACCES; 33781da177e4SLinus Torvalds 3379f932bceaSStefan Weinhuber useglobal = 0; 338068b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 33811da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3382f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3383f932bceaSStefan Weinhuber useglobal = 1; 3384f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3385f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3386f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3387f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3388f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3389f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3390f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 33911da177e4SLinus Torvalds } 3392f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 3393f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RELEASE; 3394f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3395f3eb5384SStefan Weinhuber ccw->count = 32; 3396f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 33978e09f215SStefan Weinhuber cqr->startdev = device; 33988e09f215SStefan Weinhuber cqr->memdev = device; 33991da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 34001c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3401336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 34021da177e4SLinus Torvalds cqr->expires = 2 * HZ; 34031da177e4SLinus Torvalds cqr->buildclk = get_clock(); 34041da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 34051da177e4SLinus Torvalds 34061da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 34075a27e60dSStefan Weinhuber if (!rc) 34085a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 34091da177e4SLinus Torvalds 3410f932bceaSStefan Weinhuber if (useglobal) 3411f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3412f932bceaSStefan Weinhuber else 34138e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 34141da177e4SLinus Torvalds return rc; 34151da177e4SLinus Torvalds } 34161da177e4SLinus Torvalds 34171da177e4SLinus Torvalds /* 34181da177e4SLinus Torvalds * Reserve device ioctl. 34191da177e4SLinus Torvalds * Options are set to 'synchronous wait for interrupt' and 34201da177e4SLinus Torvalds * 'timeout the request'. This leads to a terminate IO if 34211da177e4SLinus Torvalds * the interrupt is outstanding for a certain time. 34221da177e4SLinus Torvalds */ 34231da177e4SLinus Torvalds static int 34241107ccfbSChristoph Hellwig dasd_eckd_reserve(struct dasd_device *device) 34251da177e4SLinus Torvalds { 34261da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 34271da177e4SLinus Torvalds int rc; 3428f3eb5384SStefan Weinhuber struct ccw1 *ccw; 3429f932bceaSStefan Weinhuber int useglobal; 34301da177e4SLinus Torvalds 34311da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 34321da177e4SLinus Torvalds return -EACCES; 34331da177e4SLinus Torvalds 3434f932bceaSStefan Weinhuber useglobal = 0; 343568b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 34361da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3437f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3438f932bceaSStefan Weinhuber useglobal = 1; 3439f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3440f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3441f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3442f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3443f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3444f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3445f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 34461da177e4SLinus Torvalds } 3447f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 3448f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RESERVE; 3449f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3450f3eb5384SStefan Weinhuber ccw->count = 32; 3451f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 34528e09f215SStefan Weinhuber cqr->startdev = device; 34538e09f215SStefan Weinhuber cqr->memdev = device; 34541da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 34551c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3456336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 34571da177e4SLinus Torvalds cqr->expires = 2 * HZ; 34581da177e4SLinus Torvalds cqr->buildclk = get_clock(); 34591da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 34601da177e4SLinus Torvalds 34611da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 34625a27e60dSStefan Weinhuber if (!rc) 34635a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 34641da177e4SLinus Torvalds 3465f932bceaSStefan Weinhuber if (useglobal) 3466f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3467f932bceaSStefan Weinhuber else 34688e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 34691da177e4SLinus Torvalds return rc; 34701da177e4SLinus Torvalds } 34711da177e4SLinus Torvalds 34721da177e4SLinus Torvalds /* 34731da177e4SLinus Torvalds * Steal lock ioctl - unconditional reserve device. 34741da177e4SLinus Torvalds * Buils a channel programm to break a device's reservation. 34751da177e4SLinus Torvalds * (unconditional reserve) 34761da177e4SLinus Torvalds */ 34771da177e4SLinus Torvalds static int 34781107ccfbSChristoph Hellwig dasd_eckd_steal_lock(struct dasd_device *device) 34791da177e4SLinus Torvalds { 34801da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 34811da177e4SLinus Torvalds int rc; 3482f3eb5384SStefan Weinhuber struct ccw1 *ccw; 3483f932bceaSStefan Weinhuber int useglobal; 34841da177e4SLinus Torvalds 34851da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 34861da177e4SLinus Torvalds return -EACCES; 34871da177e4SLinus Torvalds 3488f932bceaSStefan Weinhuber useglobal = 0; 348968b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 34901da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3491f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3492f932bceaSStefan Weinhuber useglobal = 1; 3493f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3494f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3495f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3496f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3497f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3498f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3499f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 35001da177e4SLinus Torvalds } 3501f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 3502f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SLCK; 3503f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3504f3eb5384SStefan Weinhuber ccw->count = 32; 3505f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 35068e09f215SStefan Weinhuber cqr->startdev = device; 35078e09f215SStefan Weinhuber cqr->memdev = device; 35081da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 35091c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3510336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 35111da177e4SLinus Torvalds cqr->expires = 2 * HZ; 35121da177e4SLinus Torvalds cqr->buildclk = get_clock(); 35131da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 35141da177e4SLinus Torvalds 35151da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 35165a27e60dSStefan Weinhuber if (!rc) 35175a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 35181da177e4SLinus Torvalds 3519f932bceaSStefan Weinhuber if (useglobal) 3520f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3521f932bceaSStefan Weinhuber else 35228e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 35231da177e4SLinus Torvalds return rc; 35241da177e4SLinus Torvalds } 35251da177e4SLinus Torvalds 35261da177e4SLinus Torvalds /* 3527196339f1SStefan Weinhuber * SNID - Sense Path Group ID 3528196339f1SStefan Weinhuber * This ioctl may be used in situations where I/O is stalled due to 3529196339f1SStefan Weinhuber * a reserve, so if the normal dasd_smalloc_request fails, we use the 3530196339f1SStefan Weinhuber * preallocated dasd_reserve_req. 3531196339f1SStefan Weinhuber */ 3532196339f1SStefan Weinhuber static int dasd_eckd_snid(struct dasd_device *device, 3533196339f1SStefan Weinhuber void __user *argp) 3534196339f1SStefan Weinhuber { 3535196339f1SStefan Weinhuber struct dasd_ccw_req *cqr; 3536196339f1SStefan Weinhuber int rc; 3537196339f1SStefan Weinhuber struct ccw1 *ccw; 3538196339f1SStefan Weinhuber int useglobal; 3539196339f1SStefan Weinhuber struct dasd_snid_ioctl_data usrparm; 3540196339f1SStefan Weinhuber 3541196339f1SStefan Weinhuber if (!capable(CAP_SYS_ADMIN)) 3542196339f1SStefan Weinhuber return -EACCES; 3543196339f1SStefan Weinhuber 3544196339f1SStefan Weinhuber if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 3545196339f1SStefan Weinhuber return -EFAULT; 3546196339f1SStefan Weinhuber 3547196339f1SStefan Weinhuber useglobal = 0; 3548196339f1SStefan Weinhuber cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 3549196339f1SStefan Weinhuber sizeof(struct dasd_snid_data), device); 3550196339f1SStefan Weinhuber if (IS_ERR(cqr)) { 3551196339f1SStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3552196339f1SStefan Weinhuber useglobal = 1; 3553196339f1SStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3554196339f1SStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3555196339f1SStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3556196339f1SStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3557196339f1SStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3558196339f1SStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3559196339f1SStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 3560196339f1SStefan Weinhuber } 3561196339f1SStefan Weinhuber ccw = cqr->cpaddr; 3562196339f1SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SNID; 3563196339f1SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3564196339f1SStefan Weinhuber ccw->count = 12; 3565196339f1SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 3566196339f1SStefan Weinhuber cqr->startdev = device; 3567196339f1SStefan Weinhuber cqr->memdev = device; 3568196339f1SStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3569196339f1SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 35705a27e60dSStefan Weinhuber set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 3571196339f1SStefan Weinhuber cqr->retries = 5; 3572196339f1SStefan Weinhuber cqr->expires = 10 * HZ; 3573196339f1SStefan Weinhuber cqr->buildclk = get_clock(); 3574196339f1SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 3575196339f1SStefan Weinhuber cqr->lpm = usrparm.path_mask; 3576196339f1SStefan Weinhuber 3577196339f1SStefan Weinhuber rc = dasd_sleep_on_immediatly(cqr); 3578196339f1SStefan Weinhuber /* verify that I/O processing didn't modify the path mask */ 3579196339f1SStefan Weinhuber if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) 3580196339f1SStefan Weinhuber rc = -EIO; 3581196339f1SStefan Weinhuber if (!rc) { 3582196339f1SStefan Weinhuber usrparm.data = *((struct dasd_snid_data *)cqr->data); 3583196339f1SStefan Weinhuber if (copy_to_user(argp, &usrparm, sizeof(usrparm))) 3584196339f1SStefan Weinhuber rc = -EFAULT; 3585196339f1SStefan Weinhuber } 3586196339f1SStefan Weinhuber 3587196339f1SStefan Weinhuber if (useglobal) 3588196339f1SStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3589196339f1SStefan Weinhuber else 3590196339f1SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 3591196339f1SStefan Weinhuber return rc; 3592196339f1SStefan Weinhuber } 3593196339f1SStefan Weinhuber 3594196339f1SStefan Weinhuber /* 35951da177e4SLinus Torvalds * Read performance statistics 35961da177e4SLinus Torvalds */ 35971da177e4SLinus Torvalds static int 35981107ccfbSChristoph Hellwig dasd_eckd_performance(struct dasd_device *device, void __user *argp) 35991da177e4SLinus Torvalds { 36001da177e4SLinus Torvalds struct dasd_psf_prssd_data *prssdp; 36011da177e4SLinus Torvalds struct dasd_rssd_perf_stats_t *stats; 36021da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 36031da177e4SLinus Torvalds struct ccw1 *ccw; 36041da177e4SLinus Torvalds int rc; 36051da177e4SLinus Torvalds 360668b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 36071da177e4SLinus Torvalds (sizeof(struct dasd_psf_prssd_data) + 36081da177e4SLinus Torvalds sizeof(struct dasd_rssd_perf_stats_t)), 36091da177e4SLinus Torvalds device); 36101da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3611fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 36121da177e4SLinus Torvalds "Could not allocate initialization request"); 36131da177e4SLinus Torvalds return PTR_ERR(cqr); 36141da177e4SLinus Torvalds } 36158e09f215SStefan Weinhuber cqr->startdev = device; 36168e09f215SStefan Weinhuber cqr->memdev = device; 36171da177e4SLinus Torvalds cqr->retries = 0; 3618eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 36191da177e4SLinus Torvalds cqr->expires = 10 * HZ; 36201da177e4SLinus Torvalds 36211da177e4SLinus Torvalds /* Prepare for Read Subsystem Data */ 36221da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 36231da177e4SLinus Torvalds memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 36241da177e4SLinus Torvalds prssdp->order = PSF_ORDER_PRSSD; 36255d67d164SJoe Perches prssdp->suborder = 0x01; /* Performance Statistics */ 36261da177e4SLinus Torvalds prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 36271da177e4SLinus Torvalds 36281da177e4SLinus Torvalds ccw = cqr->cpaddr; 36291da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_PSF; 36301da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_psf_prssd_data); 36311da177e4SLinus Torvalds ccw->flags |= CCW_FLAG_CC; 36321da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) prssdp; 36331da177e4SLinus Torvalds 36341da177e4SLinus Torvalds /* Read Subsystem Data - Performance Statistics */ 36351da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 36361da177e4SLinus Torvalds memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 36371da177e4SLinus Torvalds 36381da177e4SLinus Torvalds ccw++; 36391da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_RSSD; 36401da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 36411da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) stats; 36421da177e4SLinus Torvalds 36431da177e4SLinus Torvalds cqr->buildclk = get_clock(); 36441da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 36451da177e4SLinus Torvalds rc = dasd_sleep_on(cqr); 36461da177e4SLinus Torvalds if (rc == 0) { 36471da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 36481da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 36491107ccfbSChristoph Hellwig if (copy_to_user(argp, stats, 36501107ccfbSChristoph Hellwig sizeof(struct dasd_rssd_perf_stats_t))) 36511107ccfbSChristoph Hellwig rc = -EFAULT; 36521da177e4SLinus Torvalds } 36538e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 36541da177e4SLinus Torvalds return rc; 36551da177e4SLinus Torvalds } 36561da177e4SLinus Torvalds 36571da177e4SLinus Torvalds /* 36581da177e4SLinus Torvalds * Get attributes (cache operations) 36591da177e4SLinus Torvalds * Returnes the cache attributes used in Define Extend (DE). 36601da177e4SLinus Torvalds */ 36611da177e4SLinus Torvalds static int 36621107ccfbSChristoph Hellwig dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 36631da177e4SLinus Torvalds { 36641107ccfbSChristoph Hellwig struct dasd_eckd_private *private = 36651107ccfbSChristoph Hellwig (struct dasd_eckd_private *)device->private; 36661107ccfbSChristoph Hellwig struct attrib_data_t attrib = private->attrib; 36671da177e4SLinus Torvalds int rc; 36681da177e4SLinus Torvalds 36691da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 36701da177e4SLinus Torvalds return -EACCES; 36711107ccfbSChristoph Hellwig if (!argp) 36721da177e4SLinus Torvalds return -EINVAL; 36731da177e4SLinus Torvalds 36741107ccfbSChristoph Hellwig rc = 0; 36751107ccfbSChristoph Hellwig if (copy_to_user(argp, (long *) &attrib, 36761107ccfbSChristoph Hellwig sizeof(struct attrib_data_t))) 36771107ccfbSChristoph Hellwig rc = -EFAULT; 36781da177e4SLinus Torvalds 36791da177e4SLinus Torvalds return rc; 36801da177e4SLinus Torvalds } 36811da177e4SLinus Torvalds 36821da177e4SLinus Torvalds /* 36831da177e4SLinus Torvalds * Set attributes (cache operations) 36841da177e4SLinus Torvalds * Stores the attributes for cache operation to be used in Define Extend (DE). 36851da177e4SLinus Torvalds */ 36861da177e4SLinus Torvalds static int 36871107ccfbSChristoph Hellwig dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 36881da177e4SLinus Torvalds { 36891107ccfbSChristoph Hellwig struct dasd_eckd_private *private = 36901107ccfbSChristoph Hellwig (struct dasd_eckd_private *)device->private; 36911da177e4SLinus Torvalds struct attrib_data_t attrib; 36921da177e4SLinus Torvalds 36931da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 36941da177e4SLinus Torvalds return -EACCES; 36951107ccfbSChristoph Hellwig if (!argp) 36961da177e4SLinus Torvalds return -EINVAL; 36971da177e4SLinus Torvalds 36981107ccfbSChristoph Hellwig if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 36991da177e4SLinus Torvalds return -EFAULT; 37001da177e4SLinus Torvalds private->attrib = attrib; 37011da177e4SLinus Torvalds 3702fc19f381SStefan Haberland dev_info(&device->cdev->dev, 3703fc19f381SStefan Haberland "The DASD cache mode was set to %x (%i cylinder prestage)\n", 37041da177e4SLinus Torvalds private->attrib.operation, private->attrib.nr_cyl); 37051da177e4SLinus Torvalds return 0; 37061da177e4SLinus Torvalds } 37071da177e4SLinus Torvalds 3708ab1d848fSNigel Hislop /* 3709ab1d848fSNigel Hislop * Issue syscall I/O to EMC Symmetrix array. 3710ab1d848fSNigel Hislop * CCWs are PSF and RSSD 3711ab1d848fSNigel Hislop */ 3712ab1d848fSNigel Hislop static int dasd_symm_io(struct dasd_device *device, void __user *argp) 3713ab1d848fSNigel Hislop { 3714ab1d848fSNigel Hislop struct dasd_symmio_parms usrparm; 3715ab1d848fSNigel Hislop char *psf_data, *rssd_result; 3716ab1d848fSNigel Hislop struct dasd_ccw_req *cqr; 3717ab1d848fSNigel Hislop struct ccw1 *ccw; 371852898025SNigel Hislop char psf0, psf1; 3719ab1d848fSNigel Hislop int rc; 3720ab1d848fSNigel Hislop 372152898025SNigel Hislop if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) 372252898025SNigel Hislop return -EACCES; 372352898025SNigel Hislop psf0 = psf1 = 0; 372452898025SNigel Hislop 3725ab1d848fSNigel Hislop /* Copy parms from caller */ 3726ab1d848fSNigel Hislop rc = -EFAULT; 3727ab1d848fSNigel Hislop if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 3728ab1d848fSNigel Hislop goto out; 3729f8b06859SHeiko Carstens if (is_compat_task() || sizeof(long) == 4) { 3730ab1d848fSNigel Hislop /* Make sure pointers are sane even on 31 bit. */ 3731ab1d848fSNigel Hislop rc = -EINVAL; 3732f8b06859SHeiko Carstens if ((usrparm.psf_data >> 32) != 0) 3733ab1d848fSNigel Hislop goto out; 3734f8b06859SHeiko Carstens if ((usrparm.rssd_result >> 32) != 0) 3735f8b06859SHeiko Carstens goto out; 3736f8b06859SHeiko Carstens usrparm.psf_data &= 0x7fffffffULL; 3737f8b06859SHeiko Carstens usrparm.rssd_result &= 0x7fffffffULL; 3738ab1d848fSNigel Hislop } 3739ab1d848fSNigel Hislop /* alloc I/O data area */ 3740ab1d848fSNigel Hislop psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 3741ab1d848fSNigel Hislop rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 3742ab1d848fSNigel Hislop if (!psf_data || !rssd_result) { 3743ab1d848fSNigel Hislop rc = -ENOMEM; 3744ab1d848fSNigel Hislop goto out_free; 3745ab1d848fSNigel Hislop } 3746ab1d848fSNigel Hislop 3747ab1d848fSNigel Hislop /* get syscall header from user space */ 3748ab1d848fSNigel Hislop rc = -EFAULT; 3749ab1d848fSNigel Hislop if (copy_from_user(psf_data, 3750ab1d848fSNigel Hislop (void __user *)(unsigned long) usrparm.psf_data, 3751ab1d848fSNigel Hislop usrparm.psf_data_len)) 3752ab1d848fSNigel Hislop goto out_free; 375352898025SNigel Hislop psf0 = psf_data[0]; 375452898025SNigel Hislop psf1 = psf_data[1]; 3755ab1d848fSNigel Hislop 3756ab1d848fSNigel Hislop /* setup CCWs for PSF + RSSD */ 375768b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device); 3758ab1d848fSNigel Hislop if (IS_ERR(cqr)) { 3759fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3760ab1d848fSNigel Hislop "Could not allocate initialization request"); 3761ab1d848fSNigel Hislop rc = PTR_ERR(cqr); 3762ab1d848fSNigel Hislop goto out_free; 3763ab1d848fSNigel Hislop } 3764ab1d848fSNigel Hislop 3765ab1d848fSNigel Hislop cqr->startdev = device; 3766ab1d848fSNigel Hislop cqr->memdev = device; 3767ab1d848fSNigel Hislop cqr->retries = 3; 3768ab1d848fSNigel Hislop cqr->expires = 10 * HZ; 3769ab1d848fSNigel Hislop cqr->buildclk = get_clock(); 3770ab1d848fSNigel Hislop cqr->status = DASD_CQR_FILLED; 3771ab1d848fSNigel Hislop 3772ab1d848fSNigel Hislop /* Build the ccws */ 3773ab1d848fSNigel Hislop ccw = cqr->cpaddr; 3774ab1d848fSNigel Hislop 3775ab1d848fSNigel Hislop /* PSF ccw */ 3776ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_PSF; 3777ab1d848fSNigel Hislop ccw->count = usrparm.psf_data_len; 3778ab1d848fSNigel Hislop ccw->flags |= CCW_FLAG_CC; 3779ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) psf_data; 3780ab1d848fSNigel Hislop 3781ab1d848fSNigel Hislop ccw++; 3782ab1d848fSNigel Hislop 3783ab1d848fSNigel Hislop /* RSSD ccw */ 3784ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_RSSD; 3785ab1d848fSNigel Hislop ccw->count = usrparm.rssd_result_len; 3786ab1d848fSNigel Hislop ccw->flags = CCW_FLAG_SLI ; 3787ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) rssd_result; 3788ab1d848fSNigel Hislop 3789ab1d848fSNigel Hislop rc = dasd_sleep_on(cqr); 3790ab1d848fSNigel Hislop if (rc) 3791ab1d848fSNigel Hislop goto out_sfree; 3792ab1d848fSNigel Hislop 3793ab1d848fSNigel Hislop rc = -EFAULT; 3794ab1d848fSNigel Hislop if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 3795ab1d848fSNigel Hislop rssd_result, usrparm.rssd_result_len)) 3796ab1d848fSNigel Hislop goto out_sfree; 3797ab1d848fSNigel Hislop rc = 0; 3798ab1d848fSNigel Hislop 3799ab1d848fSNigel Hislop out_sfree: 3800ab1d848fSNigel Hislop dasd_sfree_request(cqr, cqr->memdev); 3801ab1d848fSNigel Hislop out_free: 3802ab1d848fSNigel Hislop kfree(rssd_result); 3803ab1d848fSNigel Hislop kfree(psf_data); 3804ab1d848fSNigel Hislop out: 380552898025SNigel Hislop DBF_DEV_EVENT(DBF_WARNING, device, 380652898025SNigel Hislop "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", 380752898025SNigel Hislop (int) psf0, (int) psf1, rc); 3808ab1d848fSNigel Hislop return rc; 3809ab1d848fSNigel Hislop } 3810ab1d848fSNigel Hislop 38111107ccfbSChristoph Hellwig static int 38128e09f215SStefan Weinhuber dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 38131107ccfbSChristoph Hellwig { 38148e09f215SStefan Weinhuber struct dasd_device *device = block->base; 38158e09f215SStefan Weinhuber 38161107ccfbSChristoph Hellwig switch (cmd) { 38171107ccfbSChristoph Hellwig case BIODASDGATTR: 38181107ccfbSChristoph Hellwig return dasd_eckd_get_attrib(device, argp); 38191107ccfbSChristoph Hellwig case BIODASDSATTR: 38201107ccfbSChristoph Hellwig return dasd_eckd_set_attrib(device, argp); 38211107ccfbSChristoph Hellwig case BIODASDPSRD: 38221107ccfbSChristoph Hellwig return dasd_eckd_performance(device, argp); 38231107ccfbSChristoph Hellwig case BIODASDRLSE: 38241107ccfbSChristoph Hellwig return dasd_eckd_release(device); 38251107ccfbSChristoph Hellwig case BIODASDRSRV: 38261107ccfbSChristoph Hellwig return dasd_eckd_reserve(device); 38271107ccfbSChristoph Hellwig case BIODASDSLCK: 38281107ccfbSChristoph Hellwig return dasd_eckd_steal_lock(device); 3829196339f1SStefan Weinhuber case BIODASDSNID: 3830196339f1SStefan Weinhuber return dasd_eckd_snid(device, argp); 3831ab1d848fSNigel Hislop case BIODASDSYMMIO: 3832ab1d848fSNigel Hislop return dasd_symm_io(device, argp); 38331107ccfbSChristoph Hellwig default: 38346b79d14eSHeiko Carstens return -ENOTTY; 38351107ccfbSChristoph Hellwig } 38361107ccfbSChristoph Hellwig } 38371107ccfbSChristoph Hellwig 38381da177e4SLinus Torvalds /* 3839445b5b49SHorst Hummel * Dump the range of CCWs into 'page' buffer 3840445b5b49SHorst Hummel * and return number of printed chars. 3841445b5b49SHorst Hummel */ 38424d284cacSHeiko Carstens static int 3843445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 3844445b5b49SHorst Hummel { 3845445b5b49SHorst Hummel int len, count; 3846445b5b49SHorst Hummel char *datap; 3847445b5b49SHorst Hummel 3848445b5b49SHorst Hummel len = 0; 3849445b5b49SHorst Hummel while (from <= to) { 3850773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 3851445b5b49SHorst Hummel " CCW %p: %08X %08X DAT:", 3852445b5b49SHorst Hummel from, ((int *) from)[0], ((int *) from)[1]); 3853445b5b49SHorst Hummel 3854445b5b49SHorst Hummel /* get pointer to data (consider IDALs) */ 3855445b5b49SHorst Hummel if (from->flags & CCW_FLAG_IDA) 3856445b5b49SHorst Hummel datap = (char *) *((addr_t *) (addr_t) from->cda); 3857445b5b49SHorst Hummel else 3858445b5b49SHorst Hummel datap = (char *) ((addr_t) from->cda); 3859445b5b49SHorst Hummel 3860445b5b49SHorst Hummel /* dump data (max 32 bytes) */ 3861445b5b49SHorst Hummel for (count = 0; count < from->count && count < 32; count++) { 3862445b5b49SHorst Hummel if (count % 8 == 0) len += sprintf(page + len, " "); 3863445b5b49SHorst Hummel if (count % 4 == 0) len += sprintf(page + len, " "); 3864445b5b49SHorst Hummel len += sprintf(page + len, "%02x", datap[count]); 3865445b5b49SHorst Hummel } 3866445b5b49SHorst Hummel len += sprintf(page + len, "\n"); 3867445b5b49SHorst Hummel from++; 3868445b5b49SHorst Hummel } 3869445b5b49SHorst Hummel return len; 3870445b5b49SHorst Hummel } 3871445b5b49SHorst Hummel 3872fc19f381SStefan Haberland static void 3873aeec92caSStefan Haberland dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 3874aeec92caSStefan Haberland char *reason) 3875fc19f381SStefan Haberland { 3876fc19f381SStefan Haberland u64 *sense; 3877a5a0061fSStefan Weinhuber u64 *stat; 3878fc19f381SStefan Haberland 3879aeec92caSStefan Haberland sense = (u64 *) dasd_get_sense(irb); 3880a5a0061fSStefan Weinhuber stat = (u64 *) &irb->scsw; 3881fc19f381SStefan Haberland if (sense) { 3882a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " 3883a5a0061fSStefan Weinhuber "%016llx %016llx %016llx %016llx", 3884a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 3885ed3640b2SStefan Haberland sense[0], sense[1], sense[2], sense[3]); 3886fc19f381SStefan Haberland } else { 3887a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", 3888a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 3889a5a0061fSStefan Weinhuber "NO VALID SENSE"); 3890fc19f381SStefan Haberland } 3891fc19f381SStefan Haberland } 3892fc19f381SStefan Haberland 3893445b5b49SHorst Hummel /* 38941da177e4SLinus Torvalds * Print sense data and related channel program. 38951da177e4SLinus Torvalds * Parts are printed because printk buffer is only 1024 bytes. 38961da177e4SLinus Torvalds */ 3897f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 38988e09f215SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 38991da177e4SLinus Torvalds { 39001da177e4SLinus Torvalds char *page; 3901445b5b49SHorst Hummel struct ccw1 *first, *last, *fail, *from, *to; 3902445b5b49SHorst Hummel int len, sl, sct; 39031da177e4SLinus Torvalds 39041da177e4SLinus Torvalds page = (char *) get_zeroed_page(GFP_ATOMIC); 39051da177e4SLinus Torvalds if (page == NULL) { 3906fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3907fc19f381SStefan Haberland "No memory to dump sense data\n"); 39081da177e4SLinus Torvalds return; 39091da177e4SLinus Torvalds } 3910445b5b49SHorst Hummel /* dump the sense data */ 3911773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 39121da177e4SLinus Torvalds " I/O status report for device %s:\n", 39132a0217d5SKay Sievers dev_name(&device->cdev->dev)); 3914773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 3915a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 3916a5a0061fSStefan Weinhuber "CS:%02X RC:%d\n", 3917a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 3918a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 3919a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 3920a5a0061fSStefan Weinhuber req ? req->intrc : 0); 3921773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 39221da177e4SLinus Torvalds " device %s: Failing CCW: %p\n", 39232a0217d5SKay Sievers dev_name(&device->cdev->dev), 392423d805b6SPeter Oberparleiter (void *) (addr_t) irb->scsw.cmd.cpa); 39251da177e4SLinus Torvalds if (irb->esw.esw0.erw.cons) { 39261da177e4SLinus Torvalds for (sl = 0; sl < 4; sl++) { 3927773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 39281da177e4SLinus Torvalds " Sense(hex) %2d-%2d:", 39291da177e4SLinus Torvalds (8 * sl), ((8 * sl) + 7)); 39301da177e4SLinus Torvalds 39311da177e4SLinus Torvalds for (sct = 0; sct < 8; sct++) { 39321da177e4SLinus Torvalds len += sprintf(page + len, " %02x", 39331da177e4SLinus Torvalds irb->ecw[8 * sl + sct]); 39341da177e4SLinus Torvalds } 39351da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 39361da177e4SLinus Torvalds } 39371da177e4SLinus Torvalds 39381da177e4SLinus Torvalds if (irb->ecw[27] & DASD_SENSE_BIT_0) { 39391da177e4SLinus Torvalds /* 24 Byte Sense Data */ 3940773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 39411da177e4SLinus Torvalds " 24 Byte: %x MSG %x, " 39421da177e4SLinus Torvalds "%s MSGb to SYSOP\n", 39431da177e4SLinus Torvalds irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 39441da177e4SLinus Torvalds irb->ecw[1] & 0x10 ? "" : "no"); 39451da177e4SLinus Torvalds } else { 39461da177e4SLinus Torvalds /* 32 Byte Sense Data */ 3947773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 39481da177e4SLinus Torvalds " 32 Byte: Format: %x " 39491da177e4SLinus Torvalds "Exception class %x\n", 39501da177e4SLinus Torvalds irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 39511da177e4SLinus Torvalds } 39521da177e4SLinus Torvalds } else { 3953773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 39541da177e4SLinus Torvalds " SORRY - NO VALID SENSE AVAILABLE\n"); 39551da177e4SLinus Torvalds } 3956773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 39571da177e4SLinus Torvalds 39588e09f215SStefan Weinhuber if (req) { 39598e09f215SStefan Weinhuber /* req == NULL for unsolicited interrupts */ 3960445b5b49SHorst Hummel /* dump the Channel Program (max 140 Bytes per line) */ 3961445b5b49SHorst Hummel /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 3962445b5b49SHorst Hummel first = req->cpaddr; 3963445b5b49SHorst Hummel for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 3964445b5b49SHorst Hummel to = min(first + 6, last); 3965773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 39661da177e4SLinus Torvalds " Related CP in req: %p\n", req); 3967445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(first, to, page + len); 3968773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 39691da177e4SLinus Torvalds 3970445b5b49SHorst Hummel /* print failing CCW area (maximum 4) */ 3971445b5b49SHorst Hummel /* scsw->cda is either valid or zero */ 39721da177e4SLinus Torvalds len = 0; 3973445b5b49SHorst Hummel from = ++to; 397423d805b6SPeter Oberparleiter fail = (struct ccw1 *)(addr_t) 397523d805b6SPeter Oberparleiter irb->scsw.cmd.cpa; /* failing CCW */ 3976445b5b49SHorst Hummel if (from < fail - 2) { 3977445b5b49SHorst Hummel from = fail - 2; /* there is a gap - print header */ 3978773bab4aSSebastian Ott len += sprintf(page, PRINTK_HEADER "......\n"); 39791da177e4SLinus Torvalds } 3980445b5b49SHorst Hummel to = min(fail + 1, last); 3981445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, to, page + len); 39821da177e4SLinus Torvalds 3983445b5b49SHorst Hummel /* print last CCWs (maximum 2) */ 3984445b5b49SHorst Hummel from = max(from, ++to); 3985445b5b49SHorst Hummel if (from < last - 1) { 3986445b5b49SHorst Hummel from = last - 1; /* there is a gap - print header */ 3987773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER "......\n"); 39881da177e4SLinus Torvalds } 3989445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, last, page + len); 39901da177e4SLinus Torvalds if (len > 0) 3991773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 39928e09f215SStefan Weinhuber } 39931da177e4SLinus Torvalds free_page((unsigned long) page); 39941da177e4SLinus Torvalds } 39951da177e4SLinus Torvalds 3996f3eb5384SStefan Weinhuber 3997f3eb5384SStefan Weinhuber /* 3998f3eb5384SStefan Weinhuber * Print sense data from a tcw. 3999f3eb5384SStefan Weinhuber */ 4000f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 4001f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 4002f3eb5384SStefan Weinhuber { 4003f3eb5384SStefan Weinhuber char *page; 4004f3eb5384SStefan Weinhuber int len, sl, sct, residual; 4005f3eb5384SStefan Weinhuber struct tsb *tsb; 4006ef19298bSStefan Weinhuber u8 *sense, *rcq; 4007f3eb5384SStefan Weinhuber 4008f3eb5384SStefan Weinhuber page = (char *) get_zeroed_page(GFP_ATOMIC); 4009f3eb5384SStefan Weinhuber if (page == NULL) { 4010fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, " %s", 4011f3eb5384SStefan Weinhuber "No memory to dump sense data"); 4012f3eb5384SStefan Weinhuber return; 4013f3eb5384SStefan Weinhuber } 4014f3eb5384SStefan Weinhuber /* dump the sense data */ 4015773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 4016f3eb5384SStefan Weinhuber " I/O status report for device %s:\n", 4017f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev)); 4018773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4019a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 4020a5a0061fSStefan Weinhuber "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", 4021a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 4022a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 4023a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 4024a5a0061fSStefan Weinhuber irb->scsw.tm.fcxs, irb->scsw.tm.schxs, 4025a5a0061fSStefan Weinhuber req ? req->intrc : 0); 4026773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4027f3eb5384SStefan Weinhuber " device %s: Failing TCW: %p\n", 4028f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev), 4029f3eb5384SStefan Weinhuber (void *) (addr_t) irb->scsw.tm.tcw); 4030f3eb5384SStefan Weinhuber 4031f3eb5384SStefan Weinhuber tsb = NULL; 4032f3eb5384SStefan Weinhuber sense = NULL; 4033a5a0061fSStefan Weinhuber if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) 4034f3eb5384SStefan Weinhuber tsb = tcw_get_tsb( 4035f3eb5384SStefan Weinhuber (struct tcw *)(unsigned long)irb->scsw.tm.tcw); 4036f3eb5384SStefan Weinhuber 4037b8fde722SStefan Haberland if (tsb) { 4038773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4039f3eb5384SStefan Weinhuber " tsb->length %d\n", tsb->length); 4040773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4041f3eb5384SStefan Weinhuber " tsb->flags %x\n", tsb->flags); 4042773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4043f3eb5384SStefan Weinhuber " tsb->dcw_offset %d\n", tsb->dcw_offset); 4044773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4045f3eb5384SStefan Weinhuber " tsb->count %d\n", tsb->count); 4046f3eb5384SStefan Weinhuber residual = tsb->count - 28; 4047773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4048f3eb5384SStefan Weinhuber " residual %d\n", residual); 4049f3eb5384SStefan Weinhuber 4050f3eb5384SStefan Weinhuber switch (tsb->flags & 0x07) { 4051f3eb5384SStefan Weinhuber case 1: /* tsa_iostat */ 4052773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4053f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_time %d\n", 4054f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_time); 4055773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4056f3eb5384SStefan Weinhuber " tsb->tsa.iostat.def_time %d\n", 4057f3eb5384SStefan Weinhuber tsb->tsa.iostat.def_time); 4058773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4059f3eb5384SStefan Weinhuber " tsb->tsa.iostat.queue_time %d\n", 4060f3eb5384SStefan Weinhuber tsb->tsa.iostat.queue_time); 4061773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4062f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_busy_time %d\n", 4063f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_busy_time); 4064773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4065f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_act_time %d\n", 4066f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_act_time); 4067f3eb5384SStefan Weinhuber sense = tsb->tsa.iostat.sense; 4068f3eb5384SStefan Weinhuber break; 4069f3eb5384SStefan Weinhuber case 2: /* ts_ddpc */ 4070773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4071f3eb5384SStefan Weinhuber " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); 4072ef19298bSStefan Weinhuber for (sl = 0; sl < 2; sl++) { 4073773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4074ef19298bSStefan Weinhuber " tsb->tsa.ddpc.rcq %2d-%2d: ", 4075ef19298bSStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 4076ef19298bSStefan Weinhuber rcq = tsb->tsa.ddpc.rcq; 4077f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 4078f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 4079ef19298bSStefan Weinhuber rcq[8 * sl + sct]); 4080f3eb5384SStefan Weinhuber } 4081f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 4082f3eb5384SStefan Weinhuber } 4083f3eb5384SStefan Weinhuber sense = tsb->tsa.ddpc.sense; 4084f3eb5384SStefan Weinhuber break; 4085f3eb5384SStefan Weinhuber case 3: /* tsa_intrg */ 4086773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4087f3eb5384SStefan Weinhuber " tsb->tsa.intrg.: not supportet yet\n"); 4088f3eb5384SStefan Weinhuber break; 4089f3eb5384SStefan Weinhuber } 4090f3eb5384SStefan Weinhuber 4091f3eb5384SStefan Weinhuber if (sense) { 4092f3eb5384SStefan Weinhuber for (sl = 0; sl < 4; sl++) { 4093773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4094f3eb5384SStefan Weinhuber " Sense(hex) %2d-%2d:", 4095f3eb5384SStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 4096f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 4097f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 4098f3eb5384SStefan Weinhuber sense[8 * sl + sct]); 4099f3eb5384SStefan Weinhuber } 4100f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 4101f3eb5384SStefan Weinhuber } 4102f3eb5384SStefan Weinhuber 4103f3eb5384SStefan Weinhuber if (sense[27] & DASD_SENSE_BIT_0) { 4104f3eb5384SStefan Weinhuber /* 24 Byte Sense Data */ 4105773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4106f3eb5384SStefan Weinhuber " 24 Byte: %x MSG %x, " 4107f3eb5384SStefan Weinhuber "%s MSGb to SYSOP\n", 4108f3eb5384SStefan Weinhuber sense[7] >> 4, sense[7] & 0x0f, 4109f3eb5384SStefan Weinhuber sense[1] & 0x10 ? "" : "no"); 4110f3eb5384SStefan Weinhuber } else { 4111f3eb5384SStefan Weinhuber /* 32 Byte Sense Data */ 4112773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4113f3eb5384SStefan Weinhuber " 32 Byte: Format: %x " 4114f3eb5384SStefan Weinhuber "Exception class %x\n", 4115f3eb5384SStefan Weinhuber sense[6] & 0x0f, sense[22] >> 4); 4116f3eb5384SStefan Weinhuber } 4117f3eb5384SStefan Weinhuber } else { 4118773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4119f3eb5384SStefan Weinhuber " SORRY - NO VALID SENSE AVAILABLE\n"); 4120f3eb5384SStefan Weinhuber } 4121f3eb5384SStefan Weinhuber } else { 4122773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4123f3eb5384SStefan Weinhuber " SORRY - NO TSB DATA AVAILABLE\n"); 4124f3eb5384SStefan Weinhuber } 4125773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 4126f3eb5384SStefan Weinhuber free_page((unsigned long) page); 4127f3eb5384SStefan Weinhuber } 4128f3eb5384SStefan Weinhuber 4129f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense(struct dasd_device *device, 4130f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 4131f3eb5384SStefan Weinhuber { 4132a5a0061fSStefan Weinhuber if (scsw_is_tm(&irb->scsw)) 4133f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_tcw(device, req, irb); 4134f3eb5384SStefan Weinhuber else 4135f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_ccw(device, req, irb); 4136f3eb5384SStefan Weinhuber } 4137f3eb5384SStefan Weinhuber 4138501183f2SStefan Haberland static int dasd_eckd_pm_freeze(struct dasd_device *device) 4139d41dd122SStefan Haberland { 4140d41dd122SStefan Haberland /* 4141d41dd122SStefan Haberland * the device should be disconnected from our LCU structure 4142d41dd122SStefan Haberland * on restore we will reconnect it and reread LCU specific 4143d41dd122SStefan Haberland * information like PAV support that might have changed 4144d41dd122SStefan Haberland */ 4145d41dd122SStefan Haberland dasd_alias_remove_device(device); 4146d41dd122SStefan Haberland dasd_alias_disconnect_device_from_lcu(device); 4147d41dd122SStefan Haberland 4148d41dd122SStefan Haberland return 0; 4149d41dd122SStefan Haberland } 4150d41dd122SStefan Haberland 4151501183f2SStefan Haberland static int dasd_eckd_restore_device(struct dasd_device *device) 4152d41dd122SStefan Haberland { 4153d41dd122SStefan Haberland struct dasd_eckd_private *private; 41546fca97a9SStefan Haberland struct dasd_eckd_characteristics temp_rdc_data; 4155f9f8d02fSStefan Haberland int rc; 4156d41dd122SStefan Haberland struct dasd_uid temp_uid; 4157a7602f6cSStefan Haberland unsigned long flags; 4158d41dd122SStefan Haberland 4159d41dd122SStefan Haberland private = (struct dasd_eckd_private *) device->private; 4160d41dd122SStefan Haberland 4161d41dd122SStefan Haberland /* Read Configuration Data */ 4162d41dd122SStefan Haberland rc = dasd_eckd_read_conf(device); 4163d41dd122SStefan Haberland if (rc) 4164d41dd122SStefan Haberland goto out_err; 4165d41dd122SStefan Haberland 41662dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 41672dedf0d9SStefan Haberland /* Generate device unique id */ 41682dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 41692dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4170d41dd122SStefan Haberland if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) 4171a7602f6cSStefan Haberland dev_err(&device->cdev->dev, "The UID of the DASD has " 4172a7602f6cSStefan Haberland "changed\n"); 41732dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4174d41dd122SStefan Haberland if (rc) 4175d41dd122SStefan Haberland goto out_err; 4176d41dd122SStefan Haberland 4177d41dd122SStefan Haberland /* register lcu with alias handling, enable PAV if this is a new lcu */ 4178f9f8d02fSStefan Haberland rc = dasd_alias_make_device_known_to_lcu(device); 4179f9f8d02fSStefan Haberland if (rc) 4180f9f8d02fSStefan Haberland return rc; 418112d7b107SStefan Haberland dasd_eckd_validate_server(device, DASD_CQR_FLAGS_FAILFAST); 4182f4ac1d02SStefan Weinhuber 4183f4ac1d02SStefan Weinhuber /* RE-Read Configuration Data */ 4184f4ac1d02SStefan Weinhuber rc = dasd_eckd_read_conf(device); 4185d41dd122SStefan Haberland if (rc) 4186d41dd122SStefan Haberland goto out_err; 4187d41dd122SStefan Haberland 4188d41dd122SStefan Haberland /* Read Feature Codes */ 418968d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 4190d41dd122SStefan Haberland 4191d41dd122SStefan Haberland /* Read Device Characteristics */ 419268b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 41936fca97a9SStefan Haberland &temp_rdc_data, 64); 4194d41dd122SStefan Haberland if (rc) { 4195b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 4196b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 4197d41dd122SStefan Haberland goto out_err; 4198d41dd122SStefan Haberland } 4199a7602f6cSStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 42006fca97a9SStefan Haberland memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data)); 4201a7602f6cSStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4202d41dd122SStefan Haberland 4203d41dd122SStefan Haberland /* add device to alias management */ 4204d41dd122SStefan Haberland dasd_alias_add_device(device); 4205d41dd122SStefan Haberland 4206d41dd122SStefan Haberland return 0; 4207d41dd122SStefan Haberland 4208d41dd122SStefan Haberland out_err: 4209e6125fbaSStefan Haberland return -1; 4210d41dd122SStefan Haberland } 4211d41dd122SStefan Haberland 4212501183f2SStefan Haberland static int dasd_eckd_reload_device(struct dasd_device *device) 4213501183f2SStefan Haberland { 4214501183f2SStefan Haberland struct dasd_eckd_private *private; 4215501183f2SStefan Haberland int rc, old_base; 42162dedf0d9SStefan Haberland char print_uid[60]; 42172dedf0d9SStefan Haberland struct dasd_uid uid; 42182dedf0d9SStefan Haberland unsigned long flags; 4219501183f2SStefan Haberland 4220501183f2SStefan Haberland private = (struct dasd_eckd_private *) device->private; 42212dedf0d9SStefan Haberland 42222dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4223501183f2SStefan Haberland old_base = private->uid.base_unit_addr; 42242dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 42252dedf0d9SStefan Haberland 4226501183f2SStefan Haberland /* Read Configuration Data */ 4227501183f2SStefan Haberland rc = dasd_eckd_read_conf(device); 4228501183f2SStefan Haberland if (rc) 4229501183f2SStefan Haberland goto out_err; 4230501183f2SStefan Haberland 42312dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 4232501183f2SStefan Haberland if (rc) 4233501183f2SStefan Haberland goto out_err; 4234501183f2SStefan Haberland /* 4235501183f2SStefan Haberland * update unit address configuration and 4236501183f2SStefan Haberland * add device to alias management 4237501183f2SStefan Haberland */ 4238501183f2SStefan Haberland dasd_alias_update_add_device(device); 4239501183f2SStefan Haberland 42402dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &uid); 42412dedf0d9SStefan Haberland 42422dedf0d9SStefan Haberland if (old_base != uid.base_unit_addr) { 42432dedf0d9SStefan Haberland if (strlen(uid.vduit) > 0) 42442dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 42452dedf0d9SStefan Haberland "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial, 42462dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr, uid.vduit); 4247501183f2SStefan Haberland else 42482dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 42492dedf0d9SStefan Haberland "%s.%s.%04x.%02x", uid.vendor, uid.serial, 42502dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr); 4251501183f2SStefan Haberland 4252501183f2SStefan Haberland dev_info(&device->cdev->dev, 4253501183f2SStefan Haberland "An Alias device was reassigned to a new base device " 42542dedf0d9SStefan Haberland "with UID: %s\n", print_uid); 4255501183f2SStefan Haberland } 4256501183f2SStefan Haberland return 0; 4257501183f2SStefan Haberland 4258501183f2SStefan Haberland out_err: 4259501183f2SStefan Haberland return -1; 4260501183f2SStefan Haberland } 4261501183f2SStefan Haberland 4262d41dd122SStefan Haberland static struct ccw_driver dasd_eckd_driver = { 42633bda058bSSebastian Ott .driver = { 4264d41dd122SStefan Haberland .name = "dasd-eckd", 4265d41dd122SStefan Haberland .owner = THIS_MODULE, 42663bda058bSSebastian Ott }, 4267d41dd122SStefan Haberland .ids = dasd_eckd_ids, 4268d41dd122SStefan Haberland .probe = dasd_eckd_probe, 4269d41dd122SStefan Haberland .remove = dasd_generic_remove, 4270d41dd122SStefan Haberland .set_offline = dasd_generic_set_offline, 4271d41dd122SStefan Haberland .set_online = dasd_eckd_set_online, 4272d41dd122SStefan Haberland .notify = dasd_generic_notify, 4273a4d26c6aSStefan Weinhuber .path_event = dasd_generic_path_event, 42744679e893SStefan Haberland .shutdown = dasd_generic_shutdown, 4275d41dd122SStefan Haberland .freeze = dasd_generic_pm_freeze, 4276d41dd122SStefan Haberland .thaw = dasd_generic_restore_device, 4277d41dd122SStefan Haberland .restore = dasd_generic_restore_device, 4278a23ed009SStefan Haberland .uc_handler = dasd_generic_uc_handler, 4279de400d6bSPeter Oberparleiter .int_class = IOINT_DAS, 4280d41dd122SStefan Haberland }; 4281f3eb5384SStefan Weinhuber 42821da177e4SLinus Torvalds /* 42831da177e4SLinus Torvalds * max_blocks is dependent on the amount of storage that is available 42841da177e4SLinus Torvalds * in the static io buffer for each device. Currently each device has 42851da177e4SLinus Torvalds * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has 42861da177e4SLinus Torvalds * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use 42871da177e4SLinus Torvalds * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In 42881da177e4SLinus Torvalds * addition we have one define extent ccw + 16 bytes of data and one 42891da177e4SLinus Torvalds * locate record ccw + 16 bytes of data. That makes: 42901da177e4SLinus Torvalds * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. 42911da177e4SLinus Torvalds * We want to fit two into the available memory so that we can immediately 42921da177e4SLinus Torvalds * start the next request if one finishes off. That makes 249.5 blocks 42931da177e4SLinus Torvalds * for one request. Give a little safety and the result is 240. 42941da177e4SLinus Torvalds */ 42951da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline = { 42961da177e4SLinus Torvalds .owner = THIS_MODULE, 42971da177e4SLinus Torvalds .name = "ECKD", 42981da177e4SLinus Torvalds .ebcname = "ECKD", 4299ef19298bSStefan Weinhuber .max_blocks = 190, 43001da177e4SLinus Torvalds .check_device = dasd_eckd_check_characteristics, 43018e09f215SStefan Weinhuber .uncheck_device = dasd_eckd_uncheck_device, 43021da177e4SLinus Torvalds .do_analysis = dasd_eckd_do_analysis, 4303a4d26c6aSStefan Weinhuber .verify_path = dasd_eckd_verify_path, 43048e09f215SStefan Weinhuber .ready_to_online = dasd_eckd_ready_to_online, 43058e09f215SStefan Weinhuber .online_to_ready = dasd_eckd_online_to_ready, 43061da177e4SLinus Torvalds .fill_geometry = dasd_eckd_fill_geometry, 43071da177e4SLinus Torvalds .start_IO = dasd_start_IO, 43081da177e4SLinus Torvalds .term_IO = dasd_term_IO, 43098e09f215SStefan Weinhuber .handle_terminated_request = dasd_eckd_handle_terminated_request, 43101da177e4SLinus Torvalds .format_device = dasd_eckd_format_device, 43111da177e4SLinus Torvalds .erp_action = dasd_eckd_erp_action, 43121da177e4SLinus Torvalds .erp_postaction = dasd_eckd_erp_postaction, 43135a27e60dSStefan Weinhuber .check_for_device_change = dasd_eckd_check_for_device_change, 43148e09f215SStefan Weinhuber .build_cp = dasd_eckd_build_alias_cp, 43158e09f215SStefan Weinhuber .free_cp = dasd_eckd_free_alias_cp, 43161da177e4SLinus Torvalds .dump_sense = dasd_eckd_dump_sense, 4317fc19f381SStefan Haberland .dump_sense_dbf = dasd_eckd_dump_sense_dbf, 43181da177e4SLinus Torvalds .fill_info = dasd_eckd_fill_info, 43191107ccfbSChristoph Hellwig .ioctl = dasd_eckd_ioctl, 4320d41dd122SStefan Haberland .freeze = dasd_eckd_pm_freeze, 4321d41dd122SStefan Haberland .restore = dasd_eckd_restore_device, 4322501183f2SStefan Haberland .reload = dasd_eckd_reload_device, 43232dedf0d9SStefan Haberland .get_uid = dasd_eckd_get_uid, 4324f1633031SStefan Haberland .kick_validate = dasd_eckd_kick_validate_server, 43251da177e4SLinus Torvalds }; 43261da177e4SLinus Torvalds 43271da177e4SLinus Torvalds static int __init 43281da177e4SLinus Torvalds dasd_eckd_init(void) 43291da177e4SLinus Torvalds { 4330736e6ea0SSebastian Ott int ret; 4331736e6ea0SSebastian Ott 43321da177e4SLinus Torvalds ASCEBC(dasd_eckd_discipline.ebcname, 4); 4333f932bceaSStefan Weinhuber dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), 4334f932bceaSStefan Weinhuber GFP_KERNEL | GFP_DMA); 4335f932bceaSStefan Weinhuber if (!dasd_reserve_req) 4336f932bceaSStefan Weinhuber return -ENOMEM; 4337a4d26c6aSStefan Weinhuber path_verification_worker = kmalloc(sizeof(*path_verification_worker), 4338a4d26c6aSStefan Weinhuber GFP_KERNEL | GFP_DMA); 4339a4d26c6aSStefan Weinhuber if (!path_verification_worker) { 4340a4d26c6aSStefan Weinhuber kfree(dasd_reserve_req); 4341a4d26c6aSStefan Weinhuber return -ENOMEM; 4342a4d26c6aSStefan Weinhuber } 4343736e6ea0SSebastian Ott ret = ccw_driver_register(&dasd_eckd_driver); 4344736e6ea0SSebastian Ott if (!ret) 4345736e6ea0SSebastian Ott wait_for_device_probe(); 4346a4d26c6aSStefan Weinhuber else { 4347a4d26c6aSStefan Weinhuber kfree(path_verification_worker); 4348f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 4349a4d26c6aSStefan Weinhuber } 4350736e6ea0SSebastian Ott return ret; 43511da177e4SLinus Torvalds } 43521da177e4SLinus Torvalds 43531da177e4SLinus Torvalds static void __exit 43541da177e4SLinus Torvalds dasd_eckd_cleanup(void) 43551da177e4SLinus Torvalds { 43561da177e4SLinus Torvalds ccw_driver_unregister(&dasd_eckd_driver); 4357a4d26c6aSStefan Weinhuber kfree(path_verification_worker); 4358f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 43591da177e4SLinus Torvalds } 43601da177e4SLinus Torvalds 43611da177e4SLinus Torvalds module_init(dasd_eckd_init); 43621da177e4SLinus Torvalds module_exit(dasd_eckd_cleanup); 4363