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; 8651aae0560SHeiko Carstens cqr->buildclk = get_tod_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; 102955d3a85cSStefan Haberland int rc, path_err; 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; 104055d3a85cSStefan Haberland path_err = 0; 10411da177e4SLinus Torvalds /* get configuration data per operational path */ 10421da177e4SLinus Torvalds for (lpm = 0x80; lpm; lpm>>= 1) { 1043b206181dSStefan Haberland if (!(lpm & opm)) 1044b206181dSStefan Haberland continue; 104517283b56SCornelia Huck rc = dasd_eckd_read_conf_lpm(device, &conf_data, 10461da177e4SLinus Torvalds &conf_len, lpm); 10471da177e4SLinus Torvalds if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ 1048b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 10491da177e4SLinus Torvalds "Read configuration data returned " 1050b8ed5dd5SStefan Haberland "error %d", rc); 10511da177e4SLinus Torvalds return rc; 10521da177e4SLinus Torvalds } 10531da177e4SLinus Torvalds if (conf_data == NULL) { 1054b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1055b8ed5dd5SStefan Haberland "No configuration data " 1056b8ed5dd5SStefan Haberland "retrieved"); 1057a4d26c6aSStefan Weinhuber /* no further analysis possible */ 1058a4d26c6aSStefan Weinhuber path_data->opm |= lpm; 1059d133a960SGabriel Craciunescu continue; /* no error */ 10601da177e4SLinus Torvalds } 10611da177e4SLinus Torvalds /* save first valid configuration data */ 10621da177e4SLinus Torvalds if (!conf_data_saved) { 10634abb08c2SStefan Weinhuber kfree(private->conf_data); 10644abb08c2SStefan Weinhuber private->conf_data = conf_data; 10654abb08c2SStefan Weinhuber private->conf_len = conf_len; 10664abb08c2SStefan Weinhuber if (dasd_eckd_identify_conf_parts(private)) { 10674abb08c2SStefan Weinhuber private->conf_data = NULL; 10684abb08c2SStefan Weinhuber private->conf_len = 0; 10694abb08c2SStefan Weinhuber kfree(conf_data); 10704abb08c2SStefan Weinhuber continue; 10714abb08c2SStefan Weinhuber } 1072b206181dSStefan Haberland /* 1073b206181dSStefan Haberland * build device UID that other path data 1074b206181dSStefan Haberland * can be compared to it 1075b206181dSStefan Haberland */ 1076b206181dSStefan Haberland dasd_eckd_generate_uid(device); 10771da177e4SLinus Torvalds conf_data_saved++; 1078b206181dSStefan Haberland } else { 1079b206181dSStefan Haberland path_private.conf_data = conf_data; 1080b206181dSStefan Haberland path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1081b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts( 1082b206181dSStefan Haberland &path_private)) { 1083b206181dSStefan Haberland path_private.conf_data = NULL; 1084b206181dSStefan Haberland path_private.conf_len = 0; 1085b206181dSStefan Haberland kfree(conf_data); 1086b206181dSStefan Haberland continue; 1087b206181dSStefan Haberland } 1088b206181dSStefan Haberland 1089b206181dSStefan Haberland if (dasd_eckd_compare_path_uid( 1090b206181dSStefan Haberland device, &path_private)) { 1091b206181dSStefan Haberland uid = &path_private.uid; 1092b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1093b206181dSStefan Haberland snprintf(print_path_uid, 1094b206181dSStefan Haberland sizeof(print_path_uid), 1095b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1096b206181dSStefan Haberland uid->vendor, uid->serial, 1097b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1098b206181dSStefan Haberland uid->vduit); 1099b206181dSStefan Haberland else 1100b206181dSStefan Haberland snprintf(print_path_uid, 1101b206181dSStefan Haberland sizeof(print_path_uid), 1102b206181dSStefan Haberland "%s.%s.%04x.%02x", 1103b206181dSStefan Haberland uid->vendor, uid->serial, 1104b206181dSStefan Haberland uid->ssid, 1105b206181dSStefan Haberland uid->real_unit_addr); 1106b206181dSStefan Haberland uid = &private->uid; 1107b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1108b206181dSStefan Haberland snprintf(print_device_uid, 1109b206181dSStefan Haberland sizeof(print_device_uid), 1110b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1111b206181dSStefan Haberland uid->vendor, uid->serial, 1112b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1113b206181dSStefan Haberland uid->vduit); 1114b206181dSStefan Haberland else 1115b206181dSStefan Haberland snprintf(print_device_uid, 1116b206181dSStefan Haberland sizeof(print_device_uid), 1117b206181dSStefan Haberland "%s.%s.%04x.%02x", 1118b206181dSStefan Haberland uid->vendor, uid->serial, 1119b206181dSStefan Haberland uid->ssid, 1120b206181dSStefan Haberland uid->real_unit_addr); 1121b206181dSStefan Haberland dev_err(&device->cdev->dev, 1122b206181dSStefan Haberland "Not all channel paths lead to " 1123b206181dSStefan Haberland "the same device, path %02X leads to " 1124b206181dSStefan Haberland "device %s instead of %s\n", lpm, 1125b206181dSStefan Haberland print_path_uid, print_device_uid); 112655d3a85cSStefan Haberland path_err = -EINVAL; 112755d3a85cSStefan Haberland continue; 1128b206181dSStefan Haberland } 1129b206181dSStefan Haberland 1130b206181dSStefan Haberland path_private.conf_data = NULL; 1131b206181dSStefan Haberland path_private.conf_len = 0; 11321da177e4SLinus Torvalds } 11334abb08c2SStefan Weinhuber switch (dasd_eckd_path_access(conf_data, conf_len)) { 11341da177e4SLinus Torvalds case 0x02: 11351da177e4SLinus Torvalds path_data->npm |= lpm; 11361da177e4SLinus Torvalds break; 11371da177e4SLinus Torvalds case 0x03: 11381da177e4SLinus Torvalds path_data->ppm |= lpm; 11391da177e4SLinus Torvalds break; 11401da177e4SLinus Torvalds } 1141a4d26c6aSStefan Weinhuber path_data->opm |= lpm; 1142b206181dSStefan Haberland 11434abb08c2SStefan Weinhuber if (conf_data != private->conf_data) 11441da177e4SLinus Torvalds kfree(conf_data); 11451da177e4SLinus Torvalds } 1146b206181dSStefan Haberland 114755d3a85cSStefan Haberland return path_err; 11481da177e4SLinus Torvalds } 11491da177e4SLinus Torvalds 1150a4d26c6aSStefan Weinhuber static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm) 1151a4d26c6aSStefan Weinhuber { 1152a4d26c6aSStefan Weinhuber struct dasd_eckd_private *private; 1153a4d26c6aSStefan Weinhuber int mdc; 1154a4d26c6aSStefan Weinhuber u32 fcx_max_data; 1155a4d26c6aSStefan Weinhuber 1156a4d26c6aSStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 1157a4d26c6aSStefan Weinhuber if (private->fcx_max_data) { 1158a4d26c6aSStefan Weinhuber mdc = ccw_device_get_mdc(device->cdev, lpm); 1159a4d26c6aSStefan Weinhuber if ((mdc < 0)) { 1160a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1161a4d26c6aSStefan Weinhuber "Detecting the maximum data size for zHPF " 1162a4d26c6aSStefan Weinhuber "requests failed (rc=%d) for a new path %x\n", 1163a4d26c6aSStefan Weinhuber mdc, lpm); 1164a4d26c6aSStefan Weinhuber return mdc; 1165a4d26c6aSStefan Weinhuber } 1166a4d26c6aSStefan Weinhuber fcx_max_data = mdc * FCX_MAX_DATA_FACTOR; 1167a4d26c6aSStefan Weinhuber if (fcx_max_data < private->fcx_max_data) { 1168a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1169a4d26c6aSStefan Weinhuber "The maximum data size for zHPF requests %u " 1170a4d26c6aSStefan Weinhuber "on a new path %x is below the active maximum " 1171a4d26c6aSStefan Weinhuber "%u\n", fcx_max_data, lpm, 1172a4d26c6aSStefan Weinhuber private->fcx_max_data); 1173a4d26c6aSStefan Weinhuber return -EACCES; 1174a4d26c6aSStefan Weinhuber } 1175a4d26c6aSStefan Weinhuber } 1176a4d26c6aSStefan Weinhuber return 0; 1177a4d26c6aSStefan Weinhuber } 1178a4d26c6aSStefan Weinhuber 1179b206181dSStefan Haberland static int rebuild_device_uid(struct dasd_device *device, 1180b206181dSStefan Haberland struct path_verification_work_data *data) 1181b206181dSStefan Haberland { 1182b206181dSStefan Haberland struct dasd_eckd_private *private; 1183b206181dSStefan Haberland struct dasd_path *path_data; 1184b206181dSStefan Haberland __u8 lpm, opm; 1185b206181dSStefan Haberland int rc; 1186b206181dSStefan Haberland 1187b206181dSStefan Haberland rc = -ENODEV; 1188b206181dSStefan Haberland private = (struct dasd_eckd_private *) device->private; 1189b206181dSStefan Haberland path_data = &device->path_data; 1190b206181dSStefan Haberland opm = device->path_data.opm; 1191b206181dSStefan Haberland 1192b206181dSStefan Haberland for (lpm = 0x80; lpm; lpm >>= 1) { 1193b206181dSStefan Haberland if (!(lpm & opm)) 1194b206181dSStefan Haberland continue; 1195b206181dSStefan Haberland memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1196b206181dSStefan Haberland memset(&data->cqr, 0, sizeof(data->cqr)); 1197b206181dSStefan Haberland data->cqr.cpaddr = &data->ccw; 1198b206181dSStefan Haberland rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1199b206181dSStefan Haberland data->rcd_buffer, 1200b206181dSStefan Haberland lpm); 1201b206181dSStefan Haberland 1202b206181dSStefan Haberland if (rc) { 1203b206181dSStefan Haberland if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */ 1204b206181dSStefan Haberland continue; 1205b206181dSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1206b206181dSStefan Haberland "Read configuration data " 1207b206181dSStefan Haberland "returned error %d", rc); 1208b206181dSStefan Haberland break; 1209b206181dSStefan Haberland } 1210b206181dSStefan Haberland memcpy(private->conf_data, data->rcd_buffer, 1211b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE); 1212b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts(private)) { 1213b206181dSStefan Haberland rc = -ENODEV; 1214b206181dSStefan Haberland } else /* first valid path is enough */ 1215b206181dSStefan Haberland break; 1216b206181dSStefan Haberland } 1217b206181dSStefan Haberland 1218b206181dSStefan Haberland if (!rc) 1219b206181dSStefan Haberland rc = dasd_eckd_generate_uid(device); 1220b206181dSStefan Haberland 1221b206181dSStefan Haberland return rc; 1222b206181dSStefan Haberland } 1223b206181dSStefan Haberland 1224a4d26c6aSStefan Weinhuber static void do_path_verification_work(struct work_struct *work) 1225a4d26c6aSStefan Weinhuber { 1226a4d26c6aSStefan Weinhuber struct path_verification_work_data *data; 1227a4d26c6aSStefan Weinhuber struct dasd_device *device; 1228b206181dSStefan Haberland struct dasd_eckd_private path_private; 1229b206181dSStefan Haberland struct dasd_uid *uid; 1230b206181dSStefan Haberland __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE]; 1231a4d26c6aSStefan Weinhuber __u8 lpm, opm, npm, ppm, epm; 1232a4d26c6aSStefan Weinhuber unsigned long flags; 1233b206181dSStefan Haberland char print_uid[60]; 1234a4d26c6aSStefan Weinhuber int rc; 1235a4d26c6aSStefan Weinhuber 1236a4d26c6aSStefan Weinhuber data = container_of(work, struct path_verification_work_data, worker); 1237a4d26c6aSStefan Weinhuber device = data->device; 1238a4d26c6aSStefan Weinhuber 1239c8d1c0ffSStefan Haberland /* delay path verification until device was resumed */ 1240c8d1c0ffSStefan Haberland if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 1241c8d1c0ffSStefan Haberland schedule_work(work); 1242c8d1c0ffSStefan Haberland return; 1243c8d1c0ffSStefan Haberland } 1244c8d1c0ffSStefan Haberland 1245a4d26c6aSStefan Weinhuber opm = 0; 1246a4d26c6aSStefan Weinhuber npm = 0; 1247a4d26c6aSStefan Weinhuber ppm = 0; 1248a4d26c6aSStefan Weinhuber epm = 0; 1249a4d26c6aSStefan Weinhuber for (lpm = 0x80; lpm; lpm >>= 1) { 1250b206181dSStefan Haberland if (!(lpm & data->tbvpm)) 1251b206181dSStefan Haberland continue; 1252b206181dSStefan Haberland memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1253a4d26c6aSStefan Weinhuber memset(&data->cqr, 0, sizeof(data->cqr)); 1254a4d26c6aSStefan Weinhuber data->cqr.cpaddr = &data->ccw; 1255a4d26c6aSStefan Weinhuber rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1256a4d26c6aSStefan Weinhuber data->rcd_buffer, 1257a4d26c6aSStefan Weinhuber lpm); 1258a4d26c6aSStefan Weinhuber if (!rc) { 1259a4d26c6aSStefan Weinhuber switch (dasd_eckd_path_access(data->rcd_buffer, 1260b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE) 1261b206181dSStefan Haberland ) { 1262a4d26c6aSStefan Weinhuber case 0x02: 1263a4d26c6aSStefan Weinhuber npm |= lpm; 1264a4d26c6aSStefan Weinhuber break; 1265a4d26c6aSStefan Weinhuber case 0x03: 1266a4d26c6aSStefan Weinhuber ppm |= lpm; 1267a4d26c6aSStefan Weinhuber break; 1268a4d26c6aSStefan Weinhuber } 1269a4d26c6aSStefan Weinhuber opm |= lpm; 1270a4d26c6aSStefan Weinhuber } else if (rc == -EOPNOTSUPP) { 1271a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1272a4d26c6aSStefan Weinhuber "path verification: No configuration " 1273a4d26c6aSStefan Weinhuber "data retrieved"); 1274a4d26c6aSStefan Weinhuber opm |= lpm; 1275a4d26c6aSStefan Weinhuber } else if (rc == -EAGAIN) { 1276a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1277a4d26c6aSStefan Weinhuber "path verification: device is stopped," 1278a4d26c6aSStefan Weinhuber " try again later"); 1279a4d26c6aSStefan Weinhuber epm |= lpm; 1280a4d26c6aSStefan Weinhuber } else { 1281a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1282a4d26c6aSStefan Weinhuber "Reading device feature codes failed " 1283a4d26c6aSStefan Weinhuber "(rc=%d) for new path %x\n", rc, lpm); 1284a4d26c6aSStefan Weinhuber continue; 1285a4d26c6aSStefan Weinhuber } 1286a4d26c6aSStefan Weinhuber if (verify_fcx_max_data(device, lpm)) { 1287a4d26c6aSStefan Weinhuber opm &= ~lpm; 1288a4d26c6aSStefan Weinhuber npm &= ~lpm; 1289a4d26c6aSStefan Weinhuber ppm &= ~lpm; 1290b206181dSStefan Haberland continue; 1291b206181dSStefan Haberland } 1292b206181dSStefan Haberland 1293b206181dSStefan Haberland /* 1294b206181dSStefan Haberland * save conf_data for comparison after 1295b206181dSStefan Haberland * rebuild_device_uid may have changed 1296b206181dSStefan Haberland * the original data 1297b206181dSStefan Haberland */ 1298b206181dSStefan Haberland memcpy(&path_rcd_buf, data->rcd_buffer, 1299b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE); 1300b206181dSStefan Haberland path_private.conf_data = (void *) &path_rcd_buf; 1301b206181dSStefan Haberland path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1302b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts(&path_private)) { 1303b206181dSStefan Haberland path_private.conf_data = NULL; 1304b206181dSStefan Haberland path_private.conf_len = 0; 1305b206181dSStefan Haberland continue; 1306b206181dSStefan Haberland } 1307b206181dSStefan Haberland 1308b206181dSStefan Haberland /* 1309b206181dSStefan Haberland * compare path UID with device UID only if at least 1310b206181dSStefan Haberland * one valid path is left 1311b206181dSStefan Haberland * in other case the device UID may have changed and 1312b206181dSStefan Haberland * the first working path UID will be used as device UID 1313b206181dSStefan Haberland */ 1314b206181dSStefan Haberland if (device->path_data.opm && 1315b206181dSStefan Haberland dasd_eckd_compare_path_uid(device, &path_private)) { 1316b206181dSStefan Haberland /* 1317b206181dSStefan Haberland * the comparison was not successful 1318b206181dSStefan Haberland * rebuild the device UID with at least one 1319b206181dSStefan Haberland * known path in case a z/VM hyperswap command 1320b206181dSStefan Haberland * has changed the device 1321b206181dSStefan Haberland * 1322b206181dSStefan Haberland * after this compare again 1323b206181dSStefan Haberland * 1324b206181dSStefan Haberland * if either the rebuild or the recompare fails 1325b206181dSStefan Haberland * the path can not be used 1326b206181dSStefan Haberland */ 1327b206181dSStefan Haberland if (rebuild_device_uid(device, data) || 1328b206181dSStefan Haberland dasd_eckd_compare_path_uid( 1329b206181dSStefan Haberland device, &path_private)) { 1330b206181dSStefan Haberland uid = &path_private.uid; 1331b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1332b206181dSStefan Haberland snprintf(print_uid, sizeof(print_uid), 1333b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1334b206181dSStefan Haberland uid->vendor, uid->serial, 1335b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1336b206181dSStefan Haberland uid->vduit); 1337b206181dSStefan Haberland else 1338b206181dSStefan Haberland snprintf(print_uid, sizeof(print_uid), 1339b206181dSStefan Haberland "%s.%s.%04x.%02x", 1340b206181dSStefan Haberland uid->vendor, uid->serial, 1341b206181dSStefan Haberland uid->ssid, 1342b206181dSStefan Haberland uid->real_unit_addr); 1343b206181dSStefan Haberland dev_err(&device->cdev->dev, 1344b206181dSStefan Haberland "The newly added channel path %02X " 1345b206181dSStefan Haberland "will not be used because it leads " 1346b206181dSStefan Haberland "to a different device %s\n", 1347b206181dSStefan Haberland lpm, print_uid); 1348b206181dSStefan Haberland opm &= ~lpm; 1349b206181dSStefan Haberland npm &= ~lpm; 1350b206181dSStefan Haberland ppm &= ~lpm; 1351b206181dSStefan Haberland continue; 1352a4d26c6aSStefan Weinhuber } 1353a4d26c6aSStefan Weinhuber } 1354b206181dSStefan Haberland 1355a4d26c6aSStefan Weinhuber /* 1356a4d26c6aSStefan Weinhuber * There is a small chance that a path is lost again between 1357a4d26c6aSStefan Weinhuber * above path verification and the following modification of 1358a4d26c6aSStefan Weinhuber * the device opm mask. We could avoid that race here by using 1359a4d26c6aSStefan Weinhuber * yet another path mask, but we rather deal with this unlikely 1360a4d26c6aSStefan Weinhuber * situation in dasd_start_IO. 1361a4d26c6aSStefan Weinhuber */ 1362a4d26c6aSStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1363a4d26c6aSStefan Weinhuber if (!device->path_data.opm && opm) { 1364a4d26c6aSStefan Weinhuber device->path_data.opm = opm; 1365a4d26c6aSStefan Weinhuber dasd_generic_path_operational(device); 1366a4d26c6aSStefan Weinhuber } else 1367a4d26c6aSStefan Weinhuber device->path_data.opm |= opm; 1368a4d26c6aSStefan Weinhuber device->path_data.npm |= npm; 1369a4d26c6aSStefan Weinhuber device->path_data.ppm |= ppm; 1370a4d26c6aSStefan Weinhuber device->path_data.tbvpm |= epm; 1371a4d26c6aSStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1372b206181dSStefan Haberland } 1373a4d26c6aSStefan Weinhuber 1374a4d26c6aSStefan Weinhuber dasd_put_device(device); 1375a4d26c6aSStefan Weinhuber if (data->isglobal) 1376a4d26c6aSStefan Weinhuber mutex_unlock(&dasd_path_verification_mutex); 1377a4d26c6aSStefan Weinhuber else 1378a4d26c6aSStefan Weinhuber kfree(data); 1379a4d26c6aSStefan Weinhuber } 1380a4d26c6aSStefan Weinhuber 1381a4d26c6aSStefan Weinhuber static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm) 1382a4d26c6aSStefan Weinhuber { 1383a4d26c6aSStefan Weinhuber struct path_verification_work_data *data; 1384a4d26c6aSStefan Weinhuber 1385a4d26c6aSStefan Weinhuber data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA); 1386a4d26c6aSStefan Weinhuber if (!data) { 1387a4d26c6aSStefan Weinhuber if (mutex_trylock(&dasd_path_verification_mutex)) { 1388a4d26c6aSStefan Weinhuber data = path_verification_worker; 1389a4d26c6aSStefan Weinhuber data->isglobal = 1; 1390a4d26c6aSStefan Weinhuber } else 1391a4d26c6aSStefan Weinhuber return -ENOMEM; 1392a4d26c6aSStefan Weinhuber } else { 1393a4d26c6aSStefan Weinhuber memset(data, 0, sizeof(*data)); 1394a4d26c6aSStefan Weinhuber data->isglobal = 0; 1395a4d26c6aSStefan Weinhuber } 1396a4d26c6aSStefan Weinhuber INIT_WORK(&data->worker, do_path_verification_work); 1397a4d26c6aSStefan Weinhuber dasd_get_device(device); 1398a4d26c6aSStefan Weinhuber data->device = device; 1399a4d26c6aSStefan Weinhuber data->tbvpm = lpm; 1400a4d26c6aSStefan Weinhuber schedule_work(&data->worker); 1401a4d26c6aSStefan Weinhuber return 0; 1402a4d26c6aSStefan Weinhuber } 1403a4d26c6aSStefan Weinhuber 14048e09f215SStefan Weinhuber static int dasd_eckd_read_features(struct dasd_device *device) 14058e09f215SStefan Weinhuber { 14068e09f215SStefan Weinhuber struct dasd_psf_prssd_data *prssdp; 14078e09f215SStefan Weinhuber struct dasd_rssd_features *features; 14088e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 14098e09f215SStefan Weinhuber struct ccw1 *ccw; 14108e09f215SStefan Weinhuber int rc; 14118e09f215SStefan Weinhuber struct dasd_eckd_private *private; 14128e09f215SStefan Weinhuber 14138e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 141468d1e5f0SStefan Weinhuber memset(&private->features, 0, sizeof(struct dasd_rssd_features)); 141568b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 14168e09f215SStefan Weinhuber (sizeof(struct dasd_psf_prssd_data) + 14178e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)), 14188e09f215SStefan Weinhuber device); 14198e09f215SStefan Weinhuber if (IS_ERR(cqr)) { 1420b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " 1421b8ed5dd5SStefan Haberland "allocate initialization request"); 14228e09f215SStefan Weinhuber return PTR_ERR(cqr); 14238e09f215SStefan Weinhuber } 14248e09f215SStefan Weinhuber cqr->startdev = device; 14258e09f215SStefan Weinhuber cqr->memdev = device; 14268e09f215SStefan Weinhuber cqr->block = NULL; 1427eb6e199bSStefan Weinhuber cqr->retries = 256; 14288e09f215SStefan Weinhuber cqr->expires = 10 * HZ; 14298e09f215SStefan Weinhuber 14308e09f215SStefan Weinhuber /* Prepare for Read Subsystem Data */ 14318e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 14328e09f215SStefan Weinhuber memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 14338e09f215SStefan Weinhuber prssdp->order = PSF_ORDER_PRSSD; 14348e09f215SStefan Weinhuber prssdp->suborder = 0x41; /* Read Feature Codes */ 14358e09f215SStefan Weinhuber /* all other bytes of prssdp must be zero */ 14368e09f215SStefan Weinhuber 14378e09f215SStefan Weinhuber ccw = cqr->cpaddr; 14388e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PSF; 14398e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_psf_prssd_data); 14408e09f215SStefan Weinhuber ccw->flags |= CCW_FLAG_CC; 14418e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) prssdp; 14428e09f215SStefan Weinhuber 14438e09f215SStefan Weinhuber /* Read Subsystem Data - feature codes */ 14448e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 14458e09f215SStefan Weinhuber memset(features, 0, sizeof(struct dasd_rssd_features)); 14468e09f215SStefan Weinhuber 14478e09f215SStefan Weinhuber ccw++; 14488e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RSSD; 14498e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_rssd_features); 14508e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) features; 14518e09f215SStefan Weinhuber 14521aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 14538e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 14548e09f215SStefan Weinhuber rc = dasd_sleep_on(cqr); 14558e09f215SStefan Weinhuber if (rc == 0) { 14568e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 14578e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 14588e09f215SStefan Weinhuber memcpy(&private->features, features, 14598e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)); 146068d1e5f0SStefan Weinhuber } else 146168d1e5f0SStefan Weinhuber dev_warn(&device->cdev->dev, "Reading device feature codes" 146268d1e5f0SStefan Weinhuber " failed with rc=%d\n", rc); 14638e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 14648e09f215SStefan Weinhuber return rc; 14658e09f215SStefan Weinhuber } 14668e09f215SStefan Weinhuber 14678e09f215SStefan Weinhuber 14683d052595SHorst Hummel /* 146940545573SHorst Hummel * Build CP for Perform Subsystem Function - SSC. 147040545573SHorst Hummel */ 1471f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, 1472f3eb5384SStefan Weinhuber int enable_pav) 147340545573SHorst Hummel { 147440545573SHorst Hummel struct dasd_ccw_req *cqr; 147540545573SHorst Hummel struct dasd_psf_ssc_data *psf_ssc_data; 147640545573SHorst Hummel struct ccw1 *ccw; 147740545573SHorst Hummel 147868b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 147940545573SHorst Hummel sizeof(struct dasd_psf_ssc_data), 148040545573SHorst Hummel device); 148140545573SHorst Hummel 148240545573SHorst Hummel if (IS_ERR(cqr)) { 1483fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 148440545573SHorst Hummel "Could not allocate PSF-SSC request"); 148540545573SHorst Hummel return cqr; 148640545573SHorst Hummel } 148740545573SHorst Hummel psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 148840545573SHorst Hummel psf_ssc_data->order = PSF_ORDER_SSC; 1489626350b6SStefan Weinhuber psf_ssc_data->suborder = 0xc0; 1490f3eb5384SStefan Weinhuber if (enable_pav) { 1491626350b6SStefan Weinhuber psf_ssc_data->suborder |= 0x08; 14928e09f215SStefan Weinhuber psf_ssc_data->reserved[0] = 0x88; 1493f3eb5384SStefan Weinhuber } 149440545573SHorst Hummel ccw = cqr->cpaddr; 149540545573SHorst Hummel ccw->cmd_code = DASD_ECKD_CCW_PSF; 149640545573SHorst Hummel ccw->cda = (__u32)(addr_t)psf_ssc_data; 149740545573SHorst Hummel ccw->count = 66; 149840545573SHorst Hummel 14998e09f215SStefan Weinhuber cqr->startdev = device; 15008e09f215SStefan Weinhuber cqr->memdev = device; 15018e09f215SStefan Weinhuber cqr->block = NULL; 1502eb6e199bSStefan Weinhuber cqr->retries = 256; 150340545573SHorst Hummel cqr->expires = 10*HZ; 15041aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 150540545573SHorst Hummel cqr->status = DASD_CQR_FILLED; 150640545573SHorst Hummel return cqr; 150740545573SHorst Hummel } 150840545573SHorst Hummel 150940545573SHorst Hummel /* 151040545573SHorst Hummel * Perform Subsystem Function. 151140545573SHorst Hummel * It is necessary to trigger CIO for channel revalidation since this 151240545573SHorst Hummel * call might change behaviour of DASD devices. 151340545573SHorst Hummel */ 151440545573SHorst Hummel static int 151512d7b107SStefan Haberland dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav, 151612d7b107SStefan Haberland unsigned long flags) 151740545573SHorst Hummel { 151840545573SHorst Hummel struct dasd_ccw_req *cqr; 151940545573SHorst Hummel int rc; 152040545573SHorst Hummel 1521f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_psf_ssc(device, enable_pav); 152240545573SHorst Hummel if (IS_ERR(cqr)) 152340545573SHorst Hummel return PTR_ERR(cqr); 152440545573SHorst Hummel 152512d7b107SStefan Haberland /* 152612d7b107SStefan Haberland * set flags e.g. turn on failfast, to prevent blocking 152712d7b107SStefan Haberland * the calling function should handle failed requests 152812d7b107SStefan Haberland */ 152912d7b107SStefan Haberland cqr->flags |= flags; 153012d7b107SStefan Haberland 153140545573SHorst Hummel rc = dasd_sleep_on(cqr); 153240545573SHorst Hummel if (!rc) 153340545573SHorst Hummel /* trigger CIO to reprobe devices */ 153440545573SHorst Hummel css_schedule_reprobe(); 153512d7b107SStefan Haberland else if (cqr->intrc == -EAGAIN) 153612d7b107SStefan Haberland rc = -EAGAIN; 153712d7b107SStefan Haberland 15388e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 153940545573SHorst Hummel return rc; 154040545573SHorst Hummel } 154140545573SHorst Hummel 154240545573SHorst Hummel /* 154340545573SHorst Hummel * Valide storage server of current device. 154440545573SHorst Hummel */ 154512d7b107SStefan Haberland static int dasd_eckd_validate_server(struct dasd_device *device, 154612d7b107SStefan Haberland unsigned long flags) 154740545573SHorst Hummel { 154840545573SHorst Hummel int rc; 15498e09f215SStefan Weinhuber struct dasd_eckd_private *private; 1550f3eb5384SStefan Weinhuber int enable_pav; 155140545573SHorst Hummel 1552f9f8d02fSStefan Haberland private = (struct dasd_eckd_private *) device->private; 1553f9f8d02fSStefan Haberland if (private->uid.type == UA_BASE_PAV_ALIAS || 1554f9f8d02fSStefan Haberland private->uid.type == UA_HYPER_PAV_ALIAS) 155512d7b107SStefan Haberland return 0; 155640545573SHorst Hummel if (dasd_nopav || MACHINE_IS_VM) 1557f3eb5384SStefan Weinhuber enable_pav = 0; 1558f3eb5384SStefan Weinhuber else 1559f3eb5384SStefan Weinhuber enable_pav = 1; 156012d7b107SStefan Haberland rc = dasd_eckd_psf_ssc(device, enable_pav, flags); 1561eb6e199bSStefan Weinhuber 156240545573SHorst Hummel /* may be requested feature is not available on server, 156340545573SHorst Hummel * therefore just report error and go ahead */ 1564b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " 1565b8ed5dd5SStefan Haberland "returned rc=%d", private->uid.ssid, rc); 156612d7b107SStefan Haberland return rc; 156740545573SHorst Hummel } 156840545573SHorst Hummel 1569f1633031SStefan Haberland /* 1570f1633031SStefan Haberland * worker to do a validate server in case of a lost pathgroup 1571f1633031SStefan Haberland */ 1572f1633031SStefan Haberland static void dasd_eckd_do_validate_server(struct work_struct *work) 1573f1633031SStefan Haberland { 1574f1633031SStefan Haberland struct dasd_device *device = container_of(work, struct dasd_device, 1575f1633031SStefan Haberland kick_validate); 1576ea4da6eaSStefan Haberland unsigned long flags = 0; 1577ea4da6eaSStefan Haberland 1578ea4da6eaSStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &flags); 1579ea4da6eaSStefan Haberland if (dasd_eckd_validate_server(device, flags) 158012d7b107SStefan Haberland == -EAGAIN) { 158112d7b107SStefan Haberland /* schedule worker again if failed */ 158212d7b107SStefan Haberland schedule_work(&device->kick_validate); 158312d7b107SStefan Haberland return; 158412d7b107SStefan Haberland } 158512d7b107SStefan Haberland 1586f1633031SStefan Haberland dasd_put_device(device); 1587f1633031SStefan Haberland } 1588f1633031SStefan Haberland 1589f1633031SStefan Haberland static void dasd_eckd_kick_validate_server(struct dasd_device *device) 1590f1633031SStefan Haberland { 1591f1633031SStefan Haberland dasd_get_device(device); 159225e2cf1cSStefan Haberland /* exit if device not online or in offline processing */ 159325e2cf1cSStefan Haberland if (test_bit(DASD_FLAG_OFFLINE, &device->flags) || 159425e2cf1cSStefan Haberland device->state < DASD_STATE_ONLINE) { 159525e2cf1cSStefan Haberland dasd_put_device(device); 159625e2cf1cSStefan Haberland return; 159725e2cf1cSStefan Haberland } 1598f1633031SStefan Haberland /* queue call to do_validate_server to the kernel event daemon. */ 1599f1633031SStefan Haberland schedule_work(&device->kick_validate); 1600f1633031SStefan Haberland } 1601f1633031SStefan Haberland 1602ef19298bSStefan Weinhuber static u32 get_fcx_max_data(struct dasd_device *device) 1603ef19298bSStefan Weinhuber { 1604ef19298bSStefan Weinhuber #if defined(CONFIG_64BIT) 1605ef19298bSStefan Weinhuber int tpm, mdc; 1606ef19298bSStefan Weinhuber int fcx_in_css, fcx_in_gneq, fcx_in_features; 1607ef19298bSStefan Weinhuber struct dasd_eckd_private *private; 1608ef19298bSStefan Weinhuber 1609ef19298bSStefan Weinhuber if (dasd_nofcx) 1610ef19298bSStefan Weinhuber return 0; 1611ef19298bSStefan Weinhuber /* is transport mode supported? */ 1612ef19298bSStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 1613ef19298bSStefan Weinhuber fcx_in_css = css_general_characteristics.fcx; 1614ef19298bSStefan Weinhuber fcx_in_gneq = private->gneq->reserved2[7] & 0x04; 1615ef19298bSStefan Weinhuber fcx_in_features = private->features.feature[40] & 0x80; 1616ef19298bSStefan Weinhuber tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; 1617ef19298bSStefan Weinhuber 1618ef19298bSStefan Weinhuber if (!tpm) 1619ef19298bSStefan Weinhuber return 0; 1620ef19298bSStefan Weinhuber 1621ef19298bSStefan Weinhuber mdc = ccw_device_get_mdc(device->cdev, 0); 1622ef19298bSStefan Weinhuber if (mdc < 0) { 1623ef19298bSStefan Weinhuber dev_warn(&device->cdev->dev, "Detecting the maximum supported" 1624ef19298bSStefan Weinhuber " data size for zHPF requests failed\n"); 1625ef19298bSStefan Weinhuber return 0; 1626ef19298bSStefan Weinhuber } else 1627ef19298bSStefan Weinhuber return mdc * FCX_MAX_DATA_FACTOR; 1628ef19298bSStefan Weinhuber #else 1629ef19298bSStefan Weinhuber return 0; 1630ef19298bSStefan Weinhuber #endif 1631ef19298bSStefan Weinhuber } 1632ef19298bSStefan Weinhuber 163340545573SHorst Hummel /* 16343d052595SHorst Hummel * Check device characteristics. 16353d052595SHorst Hummel * If the device is accessible using ECKD discipline, the device is enabled. 16363d052595SHorst Hummel */ 16371da177e4SLinus Torvalds static int 16381da177e4SLinus Torvalds dasd_eckd_check_characteristics(struct dasd_device *device) 16391da177e4SLinus Torvalds { 16401da177e4SLinus Torvalds struct dasd_eckd_private *private; 16418e09f215SStefan Weinhuber struct dasd_block *block; 16422dedf0d9SStefan Haberland struct dasd_uid temp_uid; 1643f9f8d02fSStefan Haberland int rc, i; 164433b62a30SStefan Weinhuber int readonly; 16457c8faa86SStefan Haberland unsigned long value; 16461da177e4SLinus Torvalds 1647f1633031SStefan Haberland /* setup work queue for validate server*/ 1648f1633031SStefan Haberland INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server); 1649f1633031SStefan Haberland 1650454e1fa1SPeter Oberparleiter if (!ccw_device_is_pathgroup(device->cdev)) { 1651454e1fa1SPeter Oberparleiter dev_warn(&device->cdev->dev, 1652454e1fa1SPeter Oberparleiter "A channel path group could not be established\n"); 1653454e1fa1SPeter Oberparleiter return -EIO; 1654454e1fa1SPeter Oberparleiter } 1655454e1fa1SPeter Oberparleiter if (!ccw_device_is_multipath(device->cdev)) { 1656454e1fa1SPeter Oberparleiter dev_info(&device->cdev->dev, 1657454e1fa1SPeter Oberparleiter "The DASD is not operating in multipath mode\n"); 1658454e1fa1SPeter Oberparleiter } 16591da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 166092636b15SSebastian Ott if (!private) { 166192636b15SSebastian Ott private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); 166292636b15SSebastian Ott if (!private) { 1663fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1664fc19f381SStefan Haberland "Allocating memory for private DASD data " 1665fc19f381SStefan Haberland "failed\n"); 16661da177e4SLinus Torvalds return -ENOMEM; 16671da177e4SLinus Torvalds } 16681da177e4SLinus Torvalds device->private = (void *) private; 166992636b15SSebastian Ott } else { 167092636b15SSebastian Ott memset(private, 0, sizeof(*private)); 16711da177e4SLinus Torvalds } 16721da177e4SLinus Torvalds /* Invalidate status of initial analysis. */ 16731da177e4SLinus Torvalds private->init_cqr_status = -1; 16741da177e4SLinus Torvalds /* Set default cache operations. */ 16751da177e4SLinus Torvalds private->attrib.operation = DASD_NORMAL_CACHE; 16761da177e4SLinus Torvalds private->attrib.nr_cyl = 0; 16771da177e4SLinus Torvalds 167840545573SHorst Hummel /* Read Configuration Data */ 167940545573SHorst Hummel rc = dasd_eckd_read_conf(device); 168040545573SHorst Hummel if (rc) 16818e09f215SStefan Weinhuber goto out_err1; 168240545573SHorst Hummel 16837c8faa86SStefan Haberland /* set default timeout */ 16847c8faa86SStefan Haberland device->default_expires = DASD_EXPIRES; 16857c8faa86SStefan Haberland if (private->gneq) { 16867c8faa86SStefan Haberland value = 1; 16877c8faa86SStefan Haberland for (i = 0; i < private->gneq->timeout.value; i++) 16887c8faa86SStefan Haberland value = 10 * value; 16897c8faa86SStefan Haberland value = value * private->gneq->timeout.number; 16907c8faa86SStefan Haberland /* do not accept useless values */ 16917c8faa86SStefan Haberland if (value != 0 && value <= DASD_EXPIRES_MAX) 16927c8faa86SStefan Haberland device->default_expires = value; 16937c8faa86SStefan Haberland } 16947c8faa86SStefan Haberland 16952dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 16962dedf0d9SStefan Haberland if (temp_uid.type == UA_BASE_DEVICE) { 16978e09f215SStefan Weinhuber block = dasd_alloc_block(); 16988e09f215SStefan Weinhuber if (IS_ERR(block)) { 1699b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1700b8ed5dd5SStefan Haberland "could not allocate dasd " 1701b8ed5dd5SStefan Haberland "block structure"); 17028e09f215SStefan Weinhuber rc = PTR_ERR(block); 17038e09f215SStefan Weinhuber goto out_err1; 17048e09f215SStefan Weinhuber } 17058e09f215SStefan Weinhuber device->block = block; 17068e09f215SStefan Weinhuber block->base = device; 17078e09f215SStefan Weinhuber } 17088e09f215SStefan Weinhuber 1709f9f8d02fSStefan Haberland /* register lcu with alias handling, enable PAV */ 1710f9f8d02fSStefan Haberland rc = dasd_alias_make_device_known_to_lcu(device); 1711f9f8d02fSStefan Haberland if (rc) 17128e09f215SStefan Weinhuber goto out_err2; 1713f9f8d02fSStefan Haberland 171412d7b107SStefan Haberland dasd_eckd_validate_server(device, 0); 1715f4ac1d02SStefan Weinhuber 1716f4ac1d02SStefan Weinhuber /* device may report different configuration data after LCU setup */ 1717f4ac1d02SStefan Weinhuber rc = dasd_eckd_read_conf(device); 171840545573SHorst Hummel if (rc) 17198e09f215SStefan Weinhuber goto out_err3; 17208e09f215SStefan Weinhuber 17218e09f215SStefan Weinhuber /* Read Feature Codes */ 172268d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 172340545573SHorst Hummel 17241da177e4SLinus Torvalds /* Read Device Characteristics */ 172568b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 172668b781feSStefan Haberland &private->rdc_data, 64); 17278e09f215SStefan Weinhuber if (rc) { 1728b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1729b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 17308e09f215SStefan Weinhuber goto out_err3; 17318e09f215SStefan Weinhuber } 173234cd551aSStefan Haberland 173334cd551aSStefan Haberland if ((device->features & DASD_FEATURE_USERAW) && 173434cd551aSStefan Haberland !(private->rdc_data.facilities.RT_in_LR)) { 173534cd551aSStefan Haberland dev_err(&device->cdev->dev, "The storage server does not " 173634cd551aSStefan Haberland "support raw-track access\n"); 173734cd551aSStefan Haberland rc = -EINVAL; 173834cd551aSStefan Haberland goto out_err3; 173934cd551aSStefan Haberland } 174034cd551aSStefan Haberland 1741817f2c84SNikanth Karthikesan /* find the valid cylinder size */ 1742b44b0ab3SStefan Weinhuber if (private->rdc_data.no_cyl == LV_COMPAT_CYL && 1743b44b0ab3SStefan Weinhuber private->rdc_data.long_no_cyl) 1744b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.long_no_cyl; 1745b44b0ab3SStefan Weinhuber else 1746b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.no_cyl; 1747b44b0ab3SStefan Weinhuber 1748ef19298bSStefan Weinhuber private->fcx_max_data = get_fcx_max_data(device); 1749ef19298bSStefan Weinhuber 175033b62a30SStefan Weinhuber readonly = dasd_device_is_ro(device); 175133b62a30SStefan Weinhuber if (readonly) 175233b62a30SStefan Weinhuber set_bit(DASD_FLAG_DEVICE_RO, &device->flags); 175333b62a30SStefan Weinhuber 1754fc19f381SStefan Haberland dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " 175533b62a30SStefan Weinhuber "with %d cylinders, %d heads, %d sectors%s\n", 17561da177e4SLinus Torvalds private->rdc_data.dev_type, 17571da177e4SLinus Torvalds private->rdc_data.dev_model, 17581da177e4SLinus Torvalds private->rdc_data.cu_type, 17591da177e4SLinus Torvalds private->rdc_data.cu_model.model, 1760b44b0ab3SStefan Weinhuber private->real_cyl, 17611da177e4SLinus Torvalds private->rdc_data.trk_per_cyl, 176233b62a30SStefan Weinhuber private->rdc_data.sec_per_trk, 176333b62a30SStefan Weinhuber readonly ? ", read-only device" : ""); 17648e09f215SStefan Weinhuber return 0; 17658e09f215SStefan Weinhuber 17668e09f215SStefan Weinhuber out_err3: 17678e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 17688e09f215SStefan Weinhuber out_err2: 17698e09f215SStefan Weinhuber dasd_free_block(device->block); 17708e09f215SStefan Weinhuber device->block = NULL; 17718e09f215SStefan Weinhuber out_err1: 17724abb08c2SStefan Weinhuber kfree(private->conf_data); 17738e09f215SStefan Weinhuber kfree(device->private); 17748e09f215SStefan Weinhuber device->private = NULL; 17753d052595SHorst Hummel return rc; 17761da177e4SLinus Torvalds } 17771da177e4SLinus Torvalds 17788e09f215SStefan Weinhuber static void dasd_eckd_uncheck_device(struct dasd_device *device) 17798e09f215SStefan Weinhuber { 17804abb08c2SStefan Weinhuber struct dasd_eckd_private *private; 17814abb08c2SStefan Weinhuber 17824abb08c2SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 17838e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 17844abb08c2SStefan Weinhuber private->ned = NULL; 17854abb08c2SStefan Weinhuber private->sneq = NULL; 17864abb08c2SStefan Weinhuber private->vdsneq = NULL; 17874abb08c2SStefan Weinhuber private->gneq = NULL; 17884abb08c2SStefan Weinhuber private->conf_len = 0; 17894abb08c2SStefan Weinhuber kfree(private->conf_data); 17904abb08c2SStefan Weinhuber private->conf_data = NULL; 17918e09f215SStefan Weinhuber } 17928e09f215SStefan Weinhuber 17931da177e4SLinus Torvalds static struct dasd_ccw_req * 17941da177e4SLinus Torvalds dasd_eckd_analysis_ccw(struct dasd_device *device) 17951da177e4SLinus Torvalds { 17961da177e4SLinus Torvalds struct dasd_eckd_private *private; 17971da177e4SLinus Torvalds struct eckd_count *count_data; 17981da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 17991da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 18001da177e4SLinus Torvalds struct ccw1 *ccw; 18011da177e4SLinus Torvalds int cplength, datasize; 18021da177e4SLinus Torvalds int i; 18031da177e4SLinus Torvalds 18041da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 18051da177e4SLinus Torvalds 18061da177e4SLinus Torvalds cplength = 8; 18071da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 180868b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 18091da177e4SLinus Torvalds if (IS_ERR(cqr)) 18101da177e4SLinus Torvalds return cqr; 18111da177e4SLinus Torvalds ccw = cqr->cpaddr; 18121da177e4SLinus Torvalds /* Define extent for the first 3 tracks. */ 18131da177e4SLinus Torvalds define_extent(ccw++, cqr->data, 0, 2, 18141da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device); 18151da177e4SLinus Torvalds LO_data = cqr->data + sizeof(struct DE_eckd_data); 18161da177e4SLinus Torvalds /* Locate record for the first 4 records on track 0. */ 18171da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18181da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 0, 0, 4, 18191da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 18201da177e4SLinus Torvalds 18211da177e4SLinus Torvalds count_data = private->count_area; 18221da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 18231da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18241da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 18251da177e4SLinus Torvalds ccw->flags = 0; 18261da177e4SLinus Torvalds ccw->count = 8; 18271da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 18281da177e4SLinus Torvalds ccw++; 18291da177e4SLinus Torvalds count_data++; 18301da177e4SLinus Torvalds } 18311da177e4SLinus Torvalds 18321da177e4SLinus Torvalds /* Locate record for the first record on track 2. */ 18331da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18341da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 2, 0, 1, 18351da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 18361da177e4SLinus Torvalds /* Read count ccw. */ 18371da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18381da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 18391da177e4SLinus Torvalds ccw->flags = 0; 18401da177e4SLinus Torvalds ccw->count = 8; 18411da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 18421da177e4SLinus Torvalds 18438e09f215SStefan Weinhuber cqr->block = NULL; 18448e09f215SStefan Weinhuber cqr->startdev = device; 18458e09f215SStefan Weinhuber cqr->memdev = device; 1846eb6e199bSStefan Weinhuber cqr->retries = 255; 18471aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 18481da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 18491da177e4SLinus Torvalds return cqr; 18501da177e4SLinus Torvalds } 18511da177e4SLinus Torvalds 1852eb6e199bSStefan Weinhuber /* differentiate between 'no record found' and any other error */ 1853eb6e199bSStefan Weinhuber static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) 1854eb6e199bSStefan Weinhuber { 1855eb6e199bSStefan Weinhuber char *sense; 1856eb6e199bSStefan Weinhuber if (init_cqr->status == DASD_CQR_DONE) 1857eb6e199bSStefan Weinhuber return INIT_CQR_OK; 1858eb6e199bSStefan Weinhuber else if (init_cqr->status == DASD_CQR_NEED_ERP || 1859eb6e199bSStefan Weinhuber init_cqr->status == DASD_CQR_FAILED) { 1860eb6e199bSStefan Weinhuber sense = dasd_get_sense(&init_cqr->irb); 1861eb6e199bSStefan Weinhuber if (sense && (sense[1] & SNS1_NO_REC_FOUND)) 1862eb6e199bSStefan Weinhuber return INIT_CQR_UNFORMATTED; 1863eb6e199bSStefan Weinhuber else 1864eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 1865eb6e199bSStefan Weinhuber } else 1866eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 1867eb6e199bSStefan Weinhuber } 1868eb6e199bSStefan Weinhuber 18691da177e4SLinus Torvalds /* 18701da177e4SLinus Torvalds * This is the callback function for the init_analysis cqr. It saves 18711da177e4SLinus Torvalds * the status of the initial analysis ccw before it frees it and kicks 18721da177e4SLinus Torvalds * the device to continue the startup sequence. This will call 18731da177e4SLinus Torvalds * dasd_eckd_do_analysis again (if the devices has not been marked 18741da177e4SLinus Torvalds * for deletion in the meantime). 18751da177e4SLinus Torvalds */ 1876eb6e199bSStefan Weinhuber static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, 1877eb6e199bSStefan Weinhuber void *data) 18781da177e4SLinus Torvalds { 18791da177e4SLinus Torvalds struct dasd_eckd_private *private; 18801da177e4SLinus Torvalds struct dasd_device *device; 18811da177e4SLinus Torvalds 18828e09f215SStefan Weinhuber device = init_cqr->startdev; 18831da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 1884eb6e199bSStefan Weinhuber private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); 18851da177e4SLinus Torvalds dasd_sfree_request(init_cqr, device); 18861da177e4SLinus Torvalds dasd_kick_device(device); 18871da177e4SLinus Torvalds } 18881da177e4SLinus Torvalds 1889eb6e199bSStefan Weinhuber static int dasd_eckd_start_analysis(struct dasd_block *block) 18901da177e4SLinus Torvalds { 18911da177e4SLinus Torvalds struct dasd_ccw_req *init_cqr; 18921da177e4SLinus Torvalds 18938e09f215SStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(block->base); 18941da177e4SLinus Torvalds if (IS_ERR(init_cqr)) 18951da177e4SLinus Torvalds return PTR_ERR(init_cqr); 18961da177e4SLinus Torvalds init_cqr->callback = dasd_eckd_analysis_callback; 18971da177e4SLinus Torvalds init_cqr->callback_data = NULL; 18981da177e4SLinus Torvalds init_cqr->expires = 5*HZ; 1899eb6e199bSStefan Weinhuber /* first try without ERP, so we can later handle unformatted 1900eb6e199bSStefan Weinhuber * devices as special case 1901eb6e199bSStefan Weinhuber */ 1902eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); 1903eb6e199bSStefan Weinhuber init_cqr->retries = 0; 19041da177e4SLinus Torvalds dasd_add_request_head(init_cqr); 19051da177e4SLinus Torvalds return -EAGAIN; 19061da177e4SLinus Torvalds } 19071da177e4SLinus Torvalds 1908eb6e199bSStefan Weinhuber static int dasd_eckd_end_analysis(struct dasd_block *block) 19091da177e4SLinus Torvalds { 19108e09f215SStefan Weinhuber struct dasd_device *device; 19111da177e4SLinus Torvalds struct dasd_eckd_private *private; 19121da177e4SLinus Torvalds struct eckd_count *count_area; 19131da177e4SLinus Torvalds unsigned int sb, blk_per_trk; 19141da177e4SLinus Torvalds int status, i; 1915eb6e199bSStefan Weinhuber struct dasd_ccw_req *init_cqr; 19161da177e4SLinus Torvalds 19178e09f215SStefan Weinhuber device = block->base; 19181da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 19191da177e4SLinus Torvalds status = private->init_cqr_status; 19201da177e4SLinus Torvalds private->init_cqr_status = -1; 1921eb6e199bSStefan Weinhuber if (status == INIT_CQR_ERROR) { 1922eb6e199bSStefan Weinhuber /* try again, this time with full ERP */ 1923eb6e199bSStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(device); 1924eb6e199bSStefan Weinhuber dasd_sleep_on(init_cqr); 1925eb6e199bSStefan Weinhuber status = dasd_eckd_analysis_evaluation(init_cqr); 1926eb6e199bSStefan Weinhuber dasd_sfree_request(init_cqr, device); 1927eb6e199bSStefan Weinhuber } 1928eb6e199bSStefan Weinhuber 1929e4dbb0f2SStefan Haberland if (device->features & DASD_FEATURE_USERAW) { 1930e4dbb0f2SStefan Haberland block->bp_block = DASD_RAW_BLOCKSIZE; 1931e4dbb0f2SStefan Haberland blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; 1932e4dbb0f2SStefan Haberland block->s2b_shift = 3; 1933e4dbb0f2SStefan Haberland goto raw; 1934e4dbb0f2SStefan Haberland } 1935e4dbb0f2SStefan Haberland 1936eb6e199bSStefan Weinhuber if (status == INIT_CQR_UNFORMATTED) { 1937eb6e199bSStefan Weinhuber dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); 19381da177e4SLinus Torvalds return -EMEDIUMTYPE; 1939eb6e199bSStefan Weinhuber } else if (status == INIT_CQR_ERROR) { 1940eb6e199bSStefan Weinhuber dev_err(&device->cdev->dev, 1941eb6e199bSStefan Weinhuber "Detecting the DASD disk layout failed because " 1942eb6e199bSStefan Weinhuber "of an I/O error\n"); 1943eb6e199bSStefan Weinhuber return -EIO; 19441da177e4SLinus Torvalds } 19451da177e4SLinus Torvalds 19461da177e4SLinus Torvalds private->uses_cdl = 1; 19471da177e4SLinus Torvalds /* Check Track 0 for Compatible Disk Layout */ 19481da177e4SLinus Torvalds count_area = NULL; 19491da177e4SLinus Torvalds for (i = 0; i < 3; i++) { 19501da177e4SLinus Torvalds if (private->count_area[i].kl != 4 || 19513bc9fef9SStefan Haberland private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 || 19523bc9fef9SStefan Haberland private->count_area[i].cyl != 0 || 19533bc9fef9SStefan Haberland private->count_area[i].head != count_area_head[i] || 19543bc9fef9SStefan Haberland private->count_area[i].record != count_area_rec[i]) { 19551da177e4SLinus Torvalds private->uses_cdl = 0; 19561da177e4SLinus Torvalds break; 19571da177e4SLinus Torvalds } 19581da177e4SLinus Torvalds } 19591da177e4SLinus Torvalds if (i == 3) 19601da177e4SLinus Torvalds count_area = &private->count_area[4]; 19611da177e4SLinus Torvalds 19621da177e4SLinus Torvalds if (private->uses_cdl == 0) { 19631da177e4SLinus Torvalds for (i = 0; i < 5; i++) { 19641da177e4SLinus Torvalds if ((private->count_area[i].kl != 0) || 19651da177e4SLinus Torvalds (private->count_area[i].dl != 19663bc9fef9SStefan Haberland private->count_area[0].dl) || 19673bc9fef9SStefan Haberland private->count_area[i].cyl != 0 || 19683bc9fef9SStefan Haberland private->count_area[i].head != count_area_head[i] || 19693bc9fef9SStefan Haberland private->count_area[i].record != count_area_rec[i]) 19701da177e4SLinus Torvalds break; 19711da177e4SLinus Torvalds } 19721da177e4SLinus Torvalds if (i == 5) 19731da177e4SLinus Torvalds count_area = &private->count_area[0]; 19741da177e4SLinus Torvalds } else { 19751da177e4SLinus Torvalds if (private->count_area[3].record == 1) 1976fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1977fc19f381SStefan Haberland "Track 0 has no records following the VTOC\n"); 19781da177e4SLinus Torvalds } 1979e4dbb0f2SStefan Haberland 19801da177e4SLinus Torvalds if (count_area != NULL && count_area->kl == 0) { 19811da177e4SLinus Torvalds /* we found notthing violating our disk layout */ 19821da177e4SLinus Torvalds if (dasd_check_blocksize(count_area->dl) == 0) 19838e09f215SStefan Weinhuber block->bp_block = count_area->dl; 19841da177e4SLinus Torvalds } 19858e09f215SStefan Weinhuber if (block->bp_block == 0) { 1986fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1987fc19f381SStefan Haberland "The disk layout of the DASD is not supported\n"); 19881da177e4SLinus Torvalds return -EMEDIUMTYPE; 19891da177e4SLinus Torvalds } 19908e09f215SStefan Weinhuber block->s2b_shift = 0; /* bits to shift 512 to get a block */ 19918e09f215SStefan Weinhuber for (sb = 512; sb < block->bp_block; sb = sb << 1) 19928e09f215SStefan Weinhuber block->s2b_shift++; 19931da177e4SLinus Torvalds 19948e09f215SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 1995e4dbb0f2SStefan Haberland 1996e4dbb0f2SStefan Haberland raw: 1997b44b0ab3SStefan Weinhuber block->blocks = (private->real_cyl * 19981da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 19991da177e4SLinus Torvalds blk_per_trk); 20001da177e4SLinus Torvalds 2001fc19f381SStefan Haberland dev_info(&device->cdev->dev, 2002fc19f381SStefan Haberland "DASD with %d KB/block, %d KB total size, %d KB/track, " 2003fc19f381SStefan Haberland "%s\n", (block->bp_block >> 10), 2004b44b0ab3SStefan Weinhuber ((private->real_cyl * 20051da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 20068e09f215SStefan Weinhuber blk_per_trk * (block->bp_block >> 9)) >> 1), 20078e09f215SStefan Weinhuber ((blk_per_trk * block->bp_block) >> 10), 20081da177e4SLinus Torvalds private->uses_cdl ? 20091da177e4SLinus Torvalds "compatible disk layout" : "linux disk layout"); 20101da177e4SLinus Torvalds 20111da177e4SLinus Torvalds return 0; 20121da177e4SLinus Torvalds } 20131da177e4SLinus Torvalds 20148e09f215SStefan Weinhuber static int dasd_eckd_do_analysis(struct dasd_block *block) 20151da177e4SLinus Torvalds { 20161da177e4SLinus Torvalds struct dasd_eckd_private *private; 20171da177e4SLinus Torvalds 20188e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 20191da177e4SLinus Torvalds if (private->init_cqr_status < 0) 20208e09f215SStefan Weinhuber return dasd_eckd_start_analysis(block); 20211da177e4SLinus Torvalds else 20228e09f215SStefan Weinhuber return dasd_eckd_end_analysis(block); 20231da177e4SLinus Torvalds } 20241da177e4SLinus Torvalds 20258e09f215SStefan Weinhuber static int dasd_eckd_ready_to_online(struct dasd_device *device) 20268e09f215SStefan Weinhuber { 20278e09f215SStefan Weinhuber return dasd_alias_add_device(device); 20288e09f215SStefan Weinhuber }; 20298e09f215SStefan Weinhuber 20308e09f215SStefan Weinhuber static int dasd_eckd_online_to_ready(struct dasd_device *device) 20318e09f215SStefan Weinhuber { 2032501183f2SStefan Haberland cancel_work_sync(&device->reload_device); 203325e2cf1cSStefan Haberland cancel_work_sync(&device->kick_validate); 20348e09f215SStefan Weinhuber return dasd_alias_remove_device(device); 20358e09f215SStefan Weinhuber }; 20368e09f215SStefan Weinhuber 20371da177e4SLinus Torvalds static int 20388e09f215SStefan Weinhuber dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 20391da177e4SLinus Torvalds { 20401da177e4SLinus Torvalds struct dasd_eckd_private *private; 20411da177e4SLinus Torvalds 20428e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 20438e09f215SStefan Weinhuber if (dasd_check_blocksize(block->bp_block) == 0) { 20441da177e4SLinus Torvalds geo->sectors = recs_per_track(&private->rdc_data, 20458e09f215SStefan Weinhuber 0, block->bp_block); 20461da177e4SLinus Torvalds } 20471da177e4SLinus Torvalds geo->cylinders = private->rdc_data.no_cyl; 20481da177e4SLinus Torvalds geo->heads = private->rdc_data.trk_per_cyl; 20491da177e4SLinus Torvalds return 0; 20501da177e4SLinus Torvalds } 20511da177e4SLinus Torvalds 20521da177e4SLinus Torvalds static struct dasd_ccw_req * 20531da177e4SLinus Torvalds dasd_eckd_format_device(struct dasd_device * device, 20541da177e4SLinus Torvalds struct format_data_t * fdata) 20551da177e4SLinus Torvalds { 20561da177e4SLinus Torvalds struct dasd_eckd_private *private; 20571da177e4SLinus Torvalds struct dasd_ccw_req *fcp; 20581da177e4SLinus Torvalds struct eckd_count *ect; 20591da177e4SLinus Torvalds struct ccw1 *ccw; 20601da177e4SLinus Torvalds void *data; 2061b44b0ab3SStefan Weinhuber int rpt; 2062b44b0ab3SStefan Weinhuber struct ch_t address; 20631da177e4SLinus Torvalds int cplength, datasize; 20641da177e4SLinus Torvalds int i; 2065f9a28f7bSJean-Baptiste Joret int intensity = 0; 2066f9a28f7bSJean-Baptiste Joret int r0_perm; 20671da177e4SLinus Torvalds 20681da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 20691da177e4SLinus Torvalds rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize); 2070b44b0ab3SStefan Weinhuber set_ch_t(&address, 2071b44b0ab3SStefan Weinhuber fdata->start_unit / private->rdc_data.trk_per_cyl, 2072b44b0ab3SStefan Weinhuber fdata->start_unit % private->rdc_data.trk_per_cyl); 20731da177e4SLinus Torvalds 20741da177e4SLinus Torvalds /* Sanity checks. */ 20751da177e4SLinus Torvalds if (fdata->start_unit >= 2076b44b0ab3SStefan Weinhuber (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2077fc19f381SStefan Haberland dev_warn(&device->cdev->dev, "Start track number %d used in " 2078fc19f381SStefan Haberland "formatting is too big\n", fdata->start_unit); 20791da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 20801da177e4SLinus Torvalds } 20811da177e4SLinus Torvalds if (fdata->start_unit > fdata->stop_unit) { 2082fc19f381SStefan Haberland dev_warn(&device->cdev->dev, "Start track %d used in " 2083fc19f381SStefan Haberland "formatting exceeds end track\n", fdata->start_unit); 20841da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 20851da177e4SLinus Torvalds } 20861da177e4SLinus Torvalds if (dasd_check_blocksize(fdata->blksize) != 0) { 2087fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 2088fc19f381SStefan Haberland "The DASD cannot be formatted with block size %d\n", 20891da177e4SLinus Torvalds fdata->blksize); 20901da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 20911da177e4SLinus Torvalds } 20921da177e4SLinus Torvalds 20931da177e4SLinus Torvalds /* 20941da177e4SLinus Torvalds * fdata->intensity is a bit string that tells us what to do: 20951da177e4SLinus Torvalds * Bit 0: write record zero 20961da177e4SLinus Torvalds * Bit 1: write home address, currently not supported 20971da177e4SLinus Torvalds * Bit 2: invalidate tracks 20981da177e4SLinus Torvalds * Bit 3: use OS/390 compatible disk layout (cdl) 2099f9a28f7bSJean-Baptiste Joret * Bit 4: do not allow storage subsystem to modify record zero 21001da177e4SLinus Torvalds * Only some bit combinations do make sense. 21011da177e4SLinus Torvalds */ 2102f9a28f7bSJean-Baptiste Joret if (fdata->intensity & 0x10) { 2103f9a28f7bSJean-Baptiste Joret r0_perm = 0; 2104f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity & ~0x10; 2105f9a28f7bSJean-Baptiste Joret } else { 2106f9a28f7bSJean-Baptiste Joret r0_perm = 1; 2107f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity; 2108f9a28f7bSJean-Baptiste Joret } 2109f9a28f7bSJean-Baptiste Joret switch (intensity) { 21101da177e4SLinus Torvalds case 0x00: /* Normal format */ 21111da177e4SLinus Torvalds case 0x08: /* Normal format, use cdl. */ 21121da177e4SLinus Torvalds cplength = 2 + rpt; 21131da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 21141da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 21151da177e4SLinus Torvalds rpt * sizeof(struct eckd_count); 21161da177e4SLinus Torvalds break; 21171da177e4SLinus Torvalds case 0x01: /* Write record zero and format track. */ 21181da177e4SLinus Torvalds case 0x09: /* Write record zero and format track, use cdl. */ 21191da177e4SLinus Torvalds cplength = 3 + rpt; 21201da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 21211da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 21221da177e4SLinus Torvalds sizeof(struct eckd_count) + 21231da177e4SLinus Torvalds rpt * sizeof(struct eckd_count); 21241da177e4SLinus Torvalds break; 21251da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 21261da177e4SLinus Torvalds case 0x0c: /* Invalidate track, use cdl. */ 21271da177e4SLinus Torvalds cplength = 3; 21281da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 21291da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 21301da177e4SLinus Torvalds sizeof(struct eckd_count); 21311da177e4SLinus Torvalds break; 21321da177e4SLinus Torvalds default: 2133fc19f381SStefan Haberland dev_warn(&device->cdev->dev, "An I/O control call used " 2134fc19f381SStefan Haberland "incorrect flags 0x%x\n", fdata->intensity); 21351da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 21361da177e4SLinus Torvalds } 21371da177e4SLinus Torvalds /* Allocate the format ccw request. */ 213868b781feSStefan Haberland fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 21391da177e4SLinus Torvalds if (IS_ERR(fcp)) 21401da177e4SLinus Torvalds return fcp; 21411da177e4SLinus Torvalds 21421da177e4SLinus Torvalds data = fcp->data; 21431da177e4SLinus Torvalds ccw = fcp->cpaddr; 21441da177e4SLinus Torvalds 2145f9a28f7bSJean-Baptiste Joret switch (intensity & ~0x08) { 21461da177e4SLinus Torvalds case 0x00: /* Normal format. */ 21471da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 21481da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 21491da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device); 2150f9a28f7bSJean-Baptiste Joret /* grant subsystem permission to format R0 */ 2151f9a28f7bSJean-Baptiste Joret if (r0_perm) 2152f9a28f7bSJean-Baptiste Joret ((struct DE_eckd_data *)data)->ga_extended |= 0x04; 21531da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 21541da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 21551da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 21561da177e4SLinus Torvalds fdata->start_unit, 0, rpt, 21571da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device, 21581da177e4SLinus Torvalds fdata->blksize); 21591da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 21601da177e4SLinus Torvalds break; 21611da177e4SLinus Torvalds case 0x01: /* Write record zero + format track. */ 21621da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 21631da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 21641da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, 21651da177e4SLinus Torvalds device); 21661da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 21671da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 21681da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 21691da177e4SLinus Torvalds fdata->start_unit, 0, rpt + 1, 21701da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, device, 21718e09f215SStefan Weinhuber device->block->bp_block); 21721da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 21731da177e4SLinus Torvalds break; 21741da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 21751da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 21761da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 21771da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device); 21781da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 21791da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 21801da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 21811da177e4SLinus Torvalds fdata->start_unit, 0, 1, 21821da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device, 8); 21831da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 21841da177e4SLinus Torvalds break; 21851da177e4SLinus Torvalds } 2186f9a28f7bSJean-Baptiste Joret if (intensity & 0x01) { /* write record zero */ 21871da177e4SLinus Torvalds ect = (struct eckd_count *) data; 21881da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2189b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2190b44b0ab3SStefan Weinhuber ect->head = address.head; 21911da177e4SLinus Torvalds ect->record = 0; 21921da177e4SLinus Torvalds ect->kl = 0; 21931da177e4SLinus Torvalds ect->dl = 8; 21941da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 21951da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 21961da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 21971da177e4SLinus Torvalds ccw->count = 8; 21981da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 21991da177e4SLinus Torvalds ccw++; 22001da177e4SLinus Torvalds } 2201f9a28f7bSJean-Baptiste Joret if ((intensity & ~0x08) & 0x04) { /* erase track */ 22021da177e4SLinus Torvalds ect = (struct eckd_count *) data; 22031da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2204b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2205b44b0ab3SStefan Weinhuber ect->head = address.head; 22061da177e4SLinus Torvalds ect->record = 1; 22071da177e4SLinus Torvalds ect->kl = 0; 22081da177e4SLinus Torvalds ect->dl = 0; 22091da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 22101da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 22111da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 22121da177e4SLinus Torvalds ccw->count = 8; 22131da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 22141da177e4SLinus Torvalds } else { /* write remaining records */ 22151da177e4SLinus Torvalds for (i = 0; i < rpt; i++) { 22161da177e4SLinus Torvalds ect = (struct eckd_count *) data; 22171da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2218b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2219b44b0ab3SStefan Weinhuber ect->head = address.head; 22201da177e4SLinus Torvalds ect->record = i + 1; 22211da177e4SLinus Torvalds ect->kl = 0; 22221da177e4SLinus Torvalds ect->dl = fdata->blksize; 22231da177e4SLinus Torvalds /* Check for special tracks 0-1 when formatting CDL */ 2224f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 22251da177e4SLinus Torvalds fdata->start_unit == 0) { 22261da177e4SLinus Torvalds if (i < 3) { 22271da177e4SLinus Torvalds ect->kl = 4; 22281da177e4SLinus Torvalds ect->dl = sizes_trk0[i] - 4; 22291da177e4SLinus Torvalds } 22301da177e4SLinus Torvalds } 2231f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 22321da177e4SLinus Torvalds fdata->start_unit == 1) { 22331da177e4SLinus Torvalds ect->kl = 44; 22341da177e4SLinus Torvalds ect->dl = LABEL_SIZE - 44; 22351da177e4SLinus Torvalds } 22361da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 22371da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 22381da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 22391da177e4SLinus Torvalds ccw->count = 8; 22401da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 22411da177e4SLinus Torvalds ccw++; 22421da177e4SLinus Torvalds } 22431da177e4SLinus Torvalds } 22448e09f215SStefan Weinhuber fcp->startdev = device; 22458e09f215SStefan Weinhuber fcp->memdev = device; 2246eb6e199bSStefan Weinhuber fcp->retries = 256; 22471aae0560SHeiko Carstens fcp->buildclk = get_tod_clock(); 22481da177e4SLinus Torvalds fcp->status = DASD_CQR_FILLED; 22491da177e4SLinus Torvalds return fcp; 22501da177e4SLinus Torvalds } 22511da177e4SLinus Torvalds 22528e09f215SStefan Weinhuber static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 22531da177e4SLinus Torvalds { 22548e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 22558e09f215SStefan Weinhuber if (cqr->block && (cqr->startdev != cqr->block->base)) { 22568e09f215SStefan Weinhuber dasd_eckd_reset_ccw_to_base_io(cqr); 22578e09f215SStefan Weinhuber cqr->startdev = cqr->block->base; 2258a4d26c6aSStefan Weinhuber cqr->lpm = cqr->block->base->path_data.opm; 22591da177e4SLinus Torvalds } 22608e09f215SStefan Weinhuber }; 22611da177e4SLinus Torvalds 22621da177e4SLinus Torvalds static dasd_erp_fn_t 22631da177e4SLinus Torvalds dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 22641da177e4SLinus Torvalds { 22658e09f215SStefan Weinhuber struct dasd_device *device = (struct dasd_device *) cqr->startdev; 22661da177e4SLinus Torvalds struct ccw_device *cdev = device->cdev; 22671da177e4SLinus Torvalds 22681da177e4SLinus Torvalds switch (cdev->id.cu_type) { 22691da177e4SLinus Torvalds case 0x3990: 22701da177e4SLinus Torvalds case 0x2105: 22711da177e4SLinus Torvalds case 0x2107: 22721da177e4SLinus Torvalds case 0x1750: 22731da177e4SLinus Torvalds return dasd_3990_erp_action; 22741da177e4SLinus Torvalds case 0x9343: 22751da177e4SLinus Torvalds case 0x3880: 22761da177e4SLinus Torvalds default: 22771da177e4SLinus Torvalds return dasd_default_erp_action; 22781da177e4SLinus Torvalds } 22791da177e4SLinus Torvalds } 22801da177e4SLinus Torvalds 22811da177e4SLinus Torvalds static dasd_erp_fn_t 22821da177e4SLinus Torvalds dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 22831da177e4SLinus Torvalds { 22841da177e4SLinus Torvalds return dasd_default_erp_postaction; 22851da177e4SLinus Torvalds } 22861da177e4SLinus Torvalds 22875a27e60dSStefan Weinhuber static void dasd_eckd_check_for_device_change(struct dasd_device *device, 22885a27e60dSStefan Weinhuber struct dasd_ccw_req *cqr, 22898e09f215SStefan Weinhuber struct irb *irb) 22908e09f215SStefan Weinhuber { 22918e09f215SStefan Weinhuber char mask; 2292f3eb5384SStefan Weinhuber char *sense = NULL; 2293501183f2SStefan Haberland struct dasd_eckd_private *private; 22948e09f215SStefan Weinhuber 2295501183f2SStefan Haberland private = (struct dasd_eckd_private *) device->private; 22968e09f215SStefan Weinhuber /* first of all check for state change pending interrupt */ 22978e09f215SStefan Weinhuber mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 2298f3eb5384SStefan Weinhuber if ((scsw_dstat(&irb->scsw) & mask) == mask) { 2299c8d1c0ffSStefan Haberland /* 2300c8d1c0ffSStefan Haberland * for alias only, not in offline processing 2301c8d1c0ffSStefan Haberland * and only if not suspended 2302c8d1c0ffSStefan Haberland */ 2303501183f2SStefan Haberland if (!device->block && private->lcu && 230425e2cf1cSStefan Haberland device->state == DASD_STATE_ONLINE && 2305c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_OFFLINE, &device->flags) && 2306c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 2307501183f2SStefan Haberland /* 2308501183f2SStefan Haberland * the state change could be caused by an alias 2309501183f2SStefan Haberland * reassignment remove device from alias handling 2310501183f2SStefan Haberland * to prevent new requests from being scheduled on 2311501183f2SStefan Haberland * the wrong alias device 2312501183f2SStefan Haberland */ 2313501183f2SStefan Haberland dasd_alias_remove_device(device); 2314501183f2SStefan Haberland 2315501183f2SStefan Haberland /* schedule worker to reload device */ 2316501183f2SStefan Haberland dasd_reload_device(device); 2317501183f2SStefan Haberland } 23188e09f215SStefan Weinhuber dasd_generic_handle_state_change(device); 23198e09f215SStefan Weinhuber return; 23208e09f215SStefan Weinhuber } 23218e09f215SStefan Weinhuber 2322a5a0061fSStefan Weinhuber sense = dasd_get_sense(irb); 23235a27e60dSStefan Weinhuber if (!sense) 23245a27e60dSStefan Weinhuber return; 23255a27e60dSStefan Weinhuber 23265a27e60dSStefan Weinhuber /* summary unit check */ 2327c7a29e56SStefan Weinhuber if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) && 2328a5a0061fSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { 23298e09f215SStefan Weinhuber dasd_alias_handle_summary_unit_check(device, irb); 23308e09f215SStefan Weinhuber return; 23318e09f215SStefan Weinhuber } 23328e09f215SStefan Weinhuber 2333f60c768cSStefan Haberland /* service information message SIM */ 23345a27e60dSStefan Weinhuber if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && 2335f3eb5384SStefan Weinhuber ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 2336f3eb5384SStefan Weinhuber dasd_3990_erp_handle_sim(device, sense); 2337f60c768cSStefan Haberland return; 2338f60c768cSStefan Haberland } 2339f60c768cSStefan Haberland 23405a27e60dSStefan Weinhuber /* loss of device reservation is handled via base devices only 23415a27e60dSStefan Weinhuber * as alias devices may be used with several bases 23425a27e60dSStefan Weinhuber */ 2343c7a29e56SStefan Weinhuber if (device->block && (sense[27] & DASD_SENSE_BIT_0) && 2344c7a29e56SStefan Weinhuber (sense[7] == 0x3F) && 23455a27e60dSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && 23465a27e60dSStefan Weinhuber test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { 23475a27e60dSStefan Weinhuber if (device->features & DASD_FEATURE_FAILONSLCK) 23485a27e60dSStefan Weinhuber set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); 23495a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 23505a27e60dSStefan Weinhuber dev_err(&device->cdev->dev, 23515a27e60dSStefan Weinhuber "The device reservation was lost\n"); 2352ada3df91SStefan Haberland } 23535a27e60dSStefan Weinhuber } 2354f3eb5384SStefan Weinhuber 2355f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( 2356f3eb5384SStefan Weinhuber struct dasd_device *startdev, 23578e09f215SStefan Weinhuber struct dasd_block *block, 2358f3eb5384SStefan Weinhuber struct request *req, 2359f3eb5384SStefan Weinhuber sector_t first_rec, 2360f3eb5384SStefan Weinhuber sector_t last_rec, 2361f3eb5384SStefan Weinhuber sector_t first_trk, 2362f3eb5384SStefan Weinhuber sector_t last_trk, 2363f3eb5384SStefan Weinhuber unsigned int first_offs, 2364f3eb5384SStefan Weinhuber unsigned int last_offs, 2365f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 2366f3eb5384SStefan Weinhuber unsigned int blksize) 23671da177e4SLinus Torvalds { 23681da177e4SLinus Torvalds struct dasd_eckd_private *private; 23691da177e4SLinus Torvalds unsigned long *idaws; 23701da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 23711da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 23721da177e4SLinus Torvalds struct ccw1 *ccw; 23735705f702SNeilBrown struct req_iterator iter; 23741da177e4SLinus Torvalds struct bio_vec *bv; 23751da177e4SLinus Torvalds char *dst; 2376f3eb5384SStefan Weinhuber unsigned int off; 23771da177e4SLinus Torvalds int count, cidaw, cplength, datasize; 2378f3eb5384SStefan Weinhuber sector_t recid; 23791da177e4SLinus Torvalds unsigned char cmd, rcmd; 23808e09f215SStefan Weinhuber int use_prefix; 23818e09f215SStefan Weinhuber struct dasd_device *basedev; 23821da177e4SLinus Torvalds 23838e09f215SStefan Weinhuber basedev = block->base; 23848e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 23851da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 23861da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_READ_MT; 23871da177e4SLinus Torvalds else if (rq_data_dir(req) == WRITE) 23881da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_WRITE_MT; 23891da177e4SLinus Torvalds else 23901da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 2391f3eb5384SStefan Weinhuber 23921da177e4SLinus Torvalds /* Check struct bio and count the number of blocks for the request. */ 23931da177e4SLinus Torvalds count = 0; 23941da177e4SLinus Torvalds cidaw = 0; 23955705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 23961da177e4SLinus Torvalds if (bv->bv_len & (blksize - 1)) 23971da177e4SLinus Torvalds /* Eckd can only do full blocks. */ 23981da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 23998e09f215SStefan Weinhuber count += bv->bv_len >> (block->s2b_shift + 9); 2400347a8dc3SMartin Schwidefsky #if defined(CONFIG_64BIT) 24016c92e699SJens Axboe if (idal_is_needed (page_address(bv->bv_page), bv->bv_len)) 24028e09f215SStefan Weinhuber cidaw += bv->bv_len >> (block->s2b_shift + 9); 24031da177e4SLinus Torvalds #endif 24041da177e4SLinus Torvalds } 24051da177e4SLinus Torvalds /* Paranoia. */ 24061da177e4SLinus Torvalds if (count != last_rec - first_rec + 1) 24071da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 24088e09f215SStefan Weinhuber 24098e09f215SStefan Weinhuber /* use the prefix command if available */ 24108e09f215SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 24118e09f215SStefan Weinhuber if (use_prefix) { 24128e09f215SStefan Weinhuber /* 1x prefix + number of blocks */ 24138e09f215SStefan Weinhuber cplength = 2 + count; 24148e09f215SStefan Weinhuber /* 1x prefix + cidaws*sizeof(long) */ 24158e09f215SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 24168e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 24178e09f215SStefan Weinhuber cidaw * sizeof(unsigned long); 24188e09f215SStefan Weinhuber } else { 24191da177e4SLinus Torvalds /* 1x define extent + 1x locate record + number of blocks */ 24201da177e4SLinus Torvalds cplength = 2 + count; 24211da177e4SLinus Torvalds /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 24228e09f215SStefan Weinhuber datasize = sizeof(struct DE_eckd_data) + 24238e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 24241da177e4SLinus Torvalds cidaw * sizeof(unsigned long); 24258e09f215SStefan Weinhuber } 24261da177e4SLinus Torvalds /* Find out the number of additional locate record ccws for cdl. */ 24271da177e4SLinus Torvalds if (private->uses_cdl && first_rec < 2*blk_per_trk) { 24281da177e4SLinus Torvalds if (last_rec >= 2*blk_per_trk) 24291da177e4SLinus Torvalds count = 2*blk_per_trk - first_rec; 24301da177e4SLinus Torvalds cplength += count; 24311da177e4SLinus Torvalds datasize += count*sizeof(struct LO_eckd_data); 24321da177e4SLinus Torvalds } 24331da177e4SLinus Torvalds /* Allocate the ccw request. */ 243468b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 243568b781feSStefan Haberland startdev); 24361da177e4SLinus Torvalds if (IS_ERR(cqr)) 24371da177e4SLinus Torvalds return cqr; 24381da177e4SLinus Torvalds ccw = cqr->cpaddr; 24398e09f215SStefan Weinhuber /* First ccw is define extent or prefix. */ 24408e09f215SStefan Weinhuber if (use_prefix) { 24418e09f215SStefan Weinhuber if (prefix(ccw++, cqr->data, first_trk, 24428e09f215SStefan Weinhuber last_trk, cmd, basedev, startdev) == -EAGAIN) { 24438e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 24448e09f215SStefan Weinhuber * Try again later. 24458e09f215SStefan Weinhuber */ 24468e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2447d54853efSMartin Schwidefsky return ERR_PTR(-EAGAIN); 2448d54853efSMartin Schwidefsky } 24498e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 24508e09f215SStefan Weinhuber sizeof(struct PFX_eckd_data)); 24518e09f215SStefan Weinhuber } else { 24528e09f215SStefan Weinhuber if (define_extent(ccw++, cqr->data, first_trk, 2453b38f27e8SStefan Haberland last_trk, cmd, basedev) == -EAGAIN) { 24548e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 24558e09f215SStefan Weinhuber * Try again later. 24568e09f215SStefan Weinhuber */ 24578e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 24588e09f215SStefan Weinhuber return ERR_PTR(-EAGAIN); 24598e09f215SStefan Weinhuber } 24608e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 24618e09f215SStefan Weinhuber sizeof(struct DE_eckd_data)); 24628e09f215SStefan Weinhuber } 24631da177e4SLinus Torvalds /* Build locate_record+read/write/ccws. */ 24641da177e4SLinus Torvalds LO_data = (struct LO_eckd_data *) (idaws + cidaw); 24651da177e4SLinus Torvalds recid = first_rec; 24661da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 24671da177e4SLinus Torvalds /* Only standard blocks so there is just one locate record. */ 24681da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 24691da177e4SLinus Torvalds locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 24708e09f215SStefan Weinhuber last_rec - recid + 1, cmd, basedev, blksize); 24711da177e4SLinus Torvalds } 24725705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 24731da177e4SLinus Torvalds dst = page_address(bv->bv_page) + bv->bv_offset; 24741da177e4SLinus Torvalds if (dasd_page_cache) { 24751da177e4SLinus Torvalds char *copy = kmem_cache_alloc(dasd_page_cache, 2476441e143eSChristoph Lameter GFP_DMA | __GFP_NOWARN); 24771da177e4SLinus Torvalds if (copy && rq_data_dir(req) == WRITE) 24781da177e4SLinus Torvalds memcpy(copy + bv->bv_offset, dst, bv->bv_len); 24791da177e4SLinus Torvalds if (copy) 24801da177e4SLinus Torvalds dst = copy + bv->bv_offset; 24811da177e4SLinus Torvalds } 24821da177e4SLinus Torvalds for (off = 0; off < bv->bv_len; off += blksize) { 24831da177e4SLinus Torvalds sector_t trkid = recid; 24841da177e4SLinus Torvalds unsigned int recoffs = sector_div(trkid, blk_per_trk); 24851da177e4SLinus Torvalds rcmd = cmd; 24861da177e4SLinus Torvalds count = blksize; 24871da177e4SLinus Torvalds /* Locate record for cdl special block ? */ 24881da177e4SLinus Torvalds if (private->uses_cdl && recid < 2*blk_per_trk) { 24891da177e4SLinus Torvalds if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 24901da177e4SLinus Torvalds rcmd |= 0x8; 24911da177e4SLinus Torvalds count = dasd_eckd_cdl_reclen(recid); 2492ec5883abSHorst Hummel if (count < blksize && 2493ec5883abSHorst Hummel rq_data_dir(req) == READ) 24941da177e4SLinus Torvalds memset(dst + count, 0xe5, 24951da177e4SLinus Torvalds blksize - count); 24961da177e4SLinus Torvalds } 24971da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 24981da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 24991da177e4SLinus Torvalds trkid, recoffs + 1, 25008e09f215SStefan Weinhuber 1, rcmd, basedev, count); 25011da177e4SLinus Torvalds } 25021da177e4SLinus Torvalds /* Locate record for standard blocks ? */ 25031da177e4SLinus Torvalds if (private->uses_cdl && recid == 2*blk_per_trk) { 25041da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 25051da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 25061da177e4SLinus Torvalds trkid, recoffs + 1, 25071da177e4SLinus Torvalds last_rec - recid + 1, 25088e09f215SStefan Weinhuber cmd, basedev, count); 25091da177e4SLinus Torvalds } 25101da177e4SLinus Torvalds /* Read/write ccw. */ 25111da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 25121da177e4SLinus Torvalds ccw->cmd_code = rcmd; 25131da177e4SLinus Torvalds ccw->count = count; 25141da177e4SLinus Torvalds if (idal_is_needed(dst, blksize)) { 25151da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) idaws; 25161da177e4SLinus Torvalds ccw->flags = CCW_FLAG_IDA; 25171da177e4SLinus Torvalds idaws = idal_create_words(idaws, dst, blksize); 25181da177e4SLinus Torvalds } else { 25191da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) dst; 25201da177e4SLinus Torvalds ccw->flags = 0; 25211da177e4SLinus Torvalds } 25221da177e4SLinus Torvalds ccw++; 25231da177e4SLinus Torvalds dst += blksize; 25241da177e4SLinus Torvalds recid++; 25251da177e4SLinus Torvalds } 25261da177e4SLinus Torvalds } 252713de227bSHolger Smolinski if (blk_noretry_request(req) || 252813de227bSHolger Smolinski block->base->features & DASD_FEATURE_FAILFAST) 25291c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 25308e09f215SStefan Weinhuber cqr->startdev = startdev; 25318e09f215SStefan Weinhuber cqr->memdev = startdev; 25328e09f215SStefan Weinhuber cqr->block = block; 25337c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2534a4d26c6aSStefan Weinhuber cqr->lpm = startdev->path_data.ppm; 25351da177e4SLinus Torvalds cqr->retries = 256; 25361aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 25371da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 25381da177e4SLinus Torvalds return cqr; 25391da177e4SLinus Torvalds } 25401da177e4SLinus Torvalds 2541f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 2542f3eb5384SStefan Weinhuber struct dasd_device *startdev, 2543f3eb5384SStefan Weinhuber struct dasd_block *block, 2544f3eb5384SStefan Weinhuber struct request *req, 2545f3eb5384SStefan Weinhuber sector_t first_rec, 2546f3eb5384SStefan Weinhuber sector_t last_rec, 2547f3eb5384SStefan Weinhuber sector_t first_trk, 2548f3eb5384SStefan Weinhuber sector_t last_trk, 2549f3eb5384SStefan Weinhuber unsigned int first_offs, 2550f3eb5384SStefan Weinhuber unsigned int last_offs, 2551f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 2552f3eb5384SStefan Weinhuber unsigned int blksize) 2553f3eb5384SStefan Weinhuber { 2554f3eb5384SStefan Weinhuber unsigned long *idaws; 2555f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 2556f3eb5384SStefan Weinhuber struct ccw1 *ccw; 2557f3eb5384SStefan Weinhuber struct req_iterator iter; 2558f3eb5384SStefan Weinhuber struct bio_vec *bv; 2559f3eb5384SStefan Weinhuber char *dst, *idaw_dst; 2560f3eb5384SStefan Weinhuber unsigned int cidaw, cplength, datasize; 2561f3eb5384SStefan Weinhuber unsigned int tlf; 2562f3eb5384SStefan Weinhuber sector_t recid; 2563f3eb5384SStefan Weinhuber unsigned char cmd; 2564f3eb5384SStefan Weinhuber struct dasd_device *basedev; 2565f3eb5384SStefan Weinhuber unsigned int trkcount, count, count_to_trk_end; 2566f3eb5384SStefan Weinhuber unsigned int idaw_len, seg_len, part_len, len_to_track_end; 2567f3eb5384SStefan Weinhuber unsigned char new_track, end_idaw; 2568f3eb5384SStefan Weinhuber sector_t trkid; 2569f3eb5384SStefan Weinhuber unsigned int recoffs; 2570f3eb5384SStefan Weinhuber 2571f3eb5384SStefan Weinhuber basedev = block->base; 2572f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) 2573f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 2574f3eb5384SStefan Weinhuber else if (rq_data_dir(req) == WRITE) 2575f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 2576f3eb5384SStefan Weinhuber else 2577f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 2578f3eb5384SStefan Weinhuber 2579f3eb5384SStefan Weinhuber /* Track based I/O needs IDAWs for each page, and not just for 2580f3eb5384SStefan Weinhuber * 64 bit addresses. We need additional idals for pages 2581f3eb5384SStefan Weinhuber * that get filled from two tracks, so we use the number 2582f3eb5384SStefan Weinhuber * of records as upper limit. 2583f3eb5384SStefan Weinhuber */ 2584f3eb5384SStefan Weinhuber cidaw = last_rec - first_rec + 1; 2585f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 2586f3eb5384SStefan Weinhuber 2587f3eb5384SStefan Weinhuber /* 1x prefix + one read/write ccw per track */ 2588f3eb5384SStefan Weinhuber cplength = 1 + trkcount; 2589f3eb5384SStefan Weinhuber 2590f3eb5384SStefan Weinhuber /* on 31-bit we need space for two 32 bit addresses per page 2591f3eb5384SStefan Weinhuber * on 64-bit one 64 bit address 2592f3eb5384SStefan Weinhuber */ 2593f3eb5384SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 2594f3eb5384SStefan Weinhuber cidaw * sizeof(unsigned long long); 2595f3eb5384SStefan Weinhuber 2596f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 259768b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 259868b781feSStefan Haberland startdev); 2599f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 2600f3eb5384SStefan Weinhuber return cqr; 2601f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 2602f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 2603f3eb5384SStefan Weinhuber if (first_trk == last_trk) 2604f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 2605f3eb5384SStefan Weinhuber else 2606f3eb5384SStefan Weinhuber tlf = last_offs + 1; 2607f3eb5384SStefan Weinhuber tlf *= blksize; 2608f3eb5384SStefan Weinhuber 2609f3eb5384SStefan Weinhuber if (prefix_LRE(ccw++, cqr->data, first_trk, 2610f3eb5384SStefan Weinhuber last_trk, cmd, basedev, startdev, 2611f3eb5384SStefan Weinhuber 1 /* format */, first_offs + 1, 2612f3eb5384SStefan Weinhuber trkcount, blksize, 2613f3eb5384SStefan Weinhuber tlf) == -EAGAIN) { 2614f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 2615f3eb5384SStefan Weinhuber * Try again later. 2616f3eb5384SStefan Weinhuber */ 2617f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2618f3eb5384SStefan Weinhuber return ERR_PTR(-EAGAIN); 2619f3eb5384SStefan Weinhuber } 2620f3eb5384SStefan Weinhuber 2621f3eb5384SStefan Weinhuber /* 2622f3eb5384SStefan Weinhuber * The translation of request into ccw programs must meet the 2623f3eb5384SStefan Weinhuber * following conditions: 2624f3eb5384SStefan Weinhuber * - all idaws but the first and the last must address full pages 2625f3eb5384SStefan Weinhuber * (or 2K blocks on 31-bit) 2626f3eb5384SStefan Weinhuber * - the scope of a ccw and it's idal ends with the track boundaries 2627f3eb5384SStefan Weinhuber */ 2628f3eb5384SStefan Weinhuber idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); 2629f3eb5384SStefan Weinhuber recid = first_rec; 2630f3eb5384SStefan Weinhuber new_track = 1; 2631f3eb5384SStefan Weinhuber end_idaw = 0; 2632f3eb5384SStefan Weinhuber len_to_track_end = 0; 2633246ccea1SMartin Schwidefsky idaw_dst = NULL; 2634f3eb5384SStefan Weinhuber idaw_len = 0; 2635f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 2636f3eb5384SStefan Weinhuber dst = page_address(bv->bv_page) + bv->bv_offset; 2637f3eb5384SStefan Weinhuber seg_len = bv->bv_len; 2638f3eb5384SStefan Weinhuber while (seg_len) { 2639f3eb5384SStefan Weinhuber if (new_track) { 2640f3eb5384SStefan Weinhuber trkid = recid; 2641f3eb5384SStefan Weinhuber recoffs = sector_div(trkid, blk_per_trk); 2642f3eb5384SStefan Weinhuber count_to_trk_end = blk_per_trk - recoffs; 2643f3eb5384SStefan Weinhuber count = min((last_rec - recid + 1), 2644f3eb5384SStefan Weinhuber (sector_t)count_to_trk_end); 2645f3eb5384SStefan Weinhuber len_to_track_end = count * blksize; 2646f3eb5384SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 2647f3eb5384SStefan Weinhuber ccw->cmd_code = cmd; 2648f3eb5384SStefan Weinhuber ccw->count = len_to_track_end; 2649f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 2650f3eb5384SStefan Weinhuber ccw->flags = CCW_FLAG_IDA; 2651f3eb5384SStefan Weinhuber ccw++; 2652f3eb5384SStefan Weinhuber recid += count; 2653f3eb5384SStefan Weinhuber new_track = 0; 265452db45c3SStefan Weinhuber /* first idaw for a ccw may start anywhere */ 265552db45c3SStefan Weinhuber if (!idaw_dst) 265652db45c3SStefan Weinhuber idaw_dst = dst; 2657f3eb5384SStefan Weinhuber } 265852db45c3SStefan Weinhuber /* If we start a new idaw, we must make sure that it 265952db45c3SStefan Weinhuber * starts on an IDA_BLOCK_SIZE boundary. 2660f3eb5384SStefan Weinhuber * If we continue an idaw, we must make sure that the 2661f3eb5384SStefan Weinhuber * current segment begins where the so far accumulated 2662f3eb5384SStefan Weinhuber * idaw ends 2663f3eb5384SStefan Weinhuber */ 266452db45c3SStefan Weinhuber if (!idaw_dst) { 266552db45c3SStefan Weinhuber if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { 266652db45c3SStefan Weinhuber dasd_sfree_request(cqr, startdev); 266752db45c3SStefan Weinhuber return ERR_PTR(-ERANGE); 266852db45c3SStefan Weinhuber } else 2669f3eb5384SStefan Weinhuber idaw_dst = dst; 267052db45c3SStefan Weinhuber } 2671f3eb5384SStefan Weinhuber if ((idaw_dst + idaw_len) != dst) { 2672f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2673f3eb5384SStefan Weinhuber return ERR_PTR(-ERANGE); 2674f3eb5384SStefan Weinhuber } 2675f3eb5384SStefan Weinhuber part_len = min(seg_len, len_to_track_end); 2676f3eb5384SStefan Weinhuber seg_len -= part_len; 2677f3eb5384SStefan Weinhuber dst += part_len; 2678f3eb5384SStefan Weinhuber idaw_len += part_len; 2679f3eb5384SStefan Weinhuber len_to_track_end -= part_len; 2680f3eb5384SStefan Weinhuber /* collected memory area ends on an IDA_BLOCK border, 2681f3eb5384SStefan Weinhuber * -> create an idaw 2682f3eb5384SStefan Weinhuber * idal_create_words will handle cases where idaw_len 2683f3eb5384SStefan Weinhuber * is larger then IDA_BLOCK_SIZE 2684f3eb5384SStefan Weinhuber */ 2685f3eb5384SStefan Weinhuber if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) 2686f3eb5384SStefan Weinhuber end_idaw = 1; 2687f3eb5384SStefan Weinhuber /* We also need to end the idaw at track end */ 2688f3eb5384SStefan Weinhuber if (!len_to_track_end) { 2689f3eb5384SStefan Weinhuber new_track = 1; 2690f3eb5384SStefan Weinhuber end_idaw = 1; 2691f3eb5384SStefan Weinhuber } 2692f3eb5384SStefan Weinhuber if (end_idaw) { 2693f3eb5384SStefan Weinhuber idaws = idal_create_words(idaws, idaw_dst, 2694f3eb5384SStefan Weinhuber idaw_len); 2695246ccea1SMartin Schwidefsky idaw_dst = NULL; 2696f3eb5384SStefan Weinhuber idaw_len = 0; 2697f3eb5384SStefan Weinhuber end_idaw = 0; 2698f3eb5384SStefan Weinhuber } 2699f3eb5384SStefan Weinhuber } 2700f3eb5384SStefan Weinhuber } 2701f3eb5384SStefan Weinhuber 2702f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 2703f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 2704f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2705f3eb5384SStefan Weinhuber cqr->startdev = startdev; 2706f3eb5384SStefan Weinhuber cqr->memdev = startdev; 2707f3eb5384SStefan Weinhuber cqr->block = block; 27087c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2709a4d26c6aSStefan Weinhuber cqr->lpm = startdev->path_data.ppm; 2710f3eb5384SStefan Weinhuber cqr->retries = 256; 27111aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 2712f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 2713f3eb5384SStefan Weinhuber return cqr; 2714f3eb5384SStefan Weinhuber } 2715f3eb5384SStefan Weinhuber 2716f3eb5384SStefan Weinhuber static int prepare_itcw(struct itcw *itcw, 2717f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 2718f3eb5384SStefan Weinhuber struct dasd_device *basedev, 2719f3eb5384SStefan Weinhuber struct dasd_device *startdev, 2720f3eb5384SStefan Weinhuber unsigned int rec_on_trk, int count, 2721f3eb5384SStefan Weinhuber unsigned int blksize, 2722f3eb5384SStefan Weinhuber unsigned int total_data_size, 2723f3eb5384SStefan Weinhuber unsigned int tlf, 2724f3eb5384SStefan Weinhuber unsigned int blk_per_trk) 2725f3eb5384SStefan Weinhuber { 2726f3eb5384SStefan Weinhuber struct PFX_eckd_data pfxdata; 2727f3eb5384SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 2728f3eb5384SStefan Weinhuber struct DE_eckd_data *dedata; 2729f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 2730f3eb5384SStefan Weinhuber struct dcw *dcw; 2731f3eb5384SStefan Weinhuber 2732f3eb5384SStefan Weinhuber u32 begcyl, endcyl; 2733f3eb5384SStefan Weinhuber u16 heads, beghead, endhead; 2734f3eb5384SStefan Weinhuber u8 pfx_cmd; 2735f3eb5384SStefan Weinhuber 2736f3eb5384SStefan Weinhuber int rc = 0; 2737f3eb5384SStefan Weinhuber int sector = 0; 2738f3eb5384SStefan Weinhuber int dn, d; 2739f3eb5384SStefan Weinhuber 2740f3eb5384SStefan Weinhuber 2741f3eb5384SStefan Weinhuber /* setup prefix data */ 2742f3eb5384SStefan Weinhuber basepriv = (struct dasd_eckd_private *) basedev->private; 2743f3eb5384SStefan Weinhuber startpriv = (struct dasd_eckd_private *) startdev->private; 2744f3eb5384SStefan Weinhuber dedata = &pfxdata.define_extent; 2745f3eb5384SStefan Weinhuber lredata = &pfxdata.locate_record; 2746f3eb5384SStefan Weinhuber 2747f3eb5384SStefan Weinhuber memset(&pfxdata, 0, sizeof(pfxdata)); 2748f3eb5384SStefan Weinhuber pfxdata.format = 1; /* PFX with LRE */ 2749f3eb5384SStefan Weinhuber pfxdata.base_address = basepriv->ned->unit_addr; 2750f3eb5384SStefan Weinhuber pfxdata.base_lss = basepriv->ned->ID; 2751f3eb5384SStefan Weinhuber pfxdata.validity.define_extent = 1; 2752f3eb5384SStefan Weinhuber 2753f3eb5384SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 2754f3eb5384SStefan Weinhuber if (startpriv->uid.type != UA_BASE_DEVICE) { 2755f3eb5384SStefan Weinhuber pfxdata.validity.verify_base = 1; 2756f3eb5384SStefan Weinhuber if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 2757f3eb5384SStefan Weinhuber pfxdata.validity.hyper_pav = 1; 2758f3eb5384SStefan Weinhuber } 2759f3eb5384SStefan Weinhuber 2760f3eb5384SStefan Weinhuber switch (cmd) { 2761f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 2762f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 2763f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 2764f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 2765f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 2766f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 2767f3eb5384SStefan Weinhuber lredata->operation.operation = 0x0C; 2768f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x01; 2769f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX_READ; 2770f3eb5384SStefan Weinhuber break; 2771f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 2772f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 2773f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 2774f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 2775f3eb5384SStefan Weinhuber rc = check_XRC_on_prefix(&pfxdata, basedev); 2776f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 2777f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 2778f3eb5384SStefan Weinhuber lredata->operation.operation = 0x3F; 2779f3eb5384SStefan Weinhuber lredata->extended_operation = 0x23; 2780f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x2; 2781f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX; 2782f3eb5384SStefan Weinhuber break; 2783f3eb5384SStefan Weinhuber default: 2784f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 2785f3eb5384SStefan Weinhuber "prepare itcw, unknown opcode 0x%x", cmd); 2786f3eb5384SStefan Weinhuber BUG(); 2787f3eb5384SStefan Weinhuber break; 2788f3eb5384SStefan Weinhuber } 2789f3eb5384SStefan Weinhuber if (rc) 2790f3eb5384SStefan Weinhuber return rc; 2791f3eb5384SStefan Weinhuber 2792f3eb5384SStefan Weinhuber dedata->attributes.mode = 0x3; /* ECKD */ 2793f3eb5384SStefan Weinhuber 2794f3eb5384SStefan Weinhuber heads = basepriv->rdc_data.trk_per_cyl; 2795f3eb5384SStefan Weinhuber begcyl = trk / heads; 2796f3eb5384SStefan Weinhuber beghead = trk % heads; 2797f3eb5384SStefan Weinhuber endcyl = totrk / heads; 2798f3eb5384SStefan Weinhuber endhead = totrk % heads; 2799f3eb5384SStefan Weinhuber 2800f3eb5384SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 2801f3eb5384SStefan Weinhuber if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 2802f3eb5384SStefan Weinhuber dedata->attributes.operation == DASD_SEQ_ACCESS) { 2803f3eb5384SStefan Weinhuber 2804f3eb5384SStefan Weinhuber if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 2805f3eb5384SStefan Weinhuber endcyl += basepriv->attrib.nr_cyl; 2806f3eb5384SStefan Weinhuber else 2807f3eb5384SStefan Weinhuber endcyl = (basepriv->real_cyl - 1); 2808f3eb5384SStefan Weinhuber } 2809f3eb5384SStefan Weinhuber 2810f3eb5384SStefan Weinhuber set_ch_t(&dedata->beg_ext, begcyl, beghead); 2811f3eb5384SStefan Weinhuber set_ch_t(&dedata->end_ext, endcyl, endhead); 2812f3eb5384SStefan Weinhuber 2813f3eb5384SStefan Weinhuber dedata->ep_format = 0x20; /* records per track is valid */ 2814f3eb5384SStefan Weinhuber dedata->ep_rec_per_track = blk_per_trk; 2815f3eb5384SStefan Weinhuber 2816f3eb5384SStefan Weinhuber if (rec_on_trk) { 2817f3eb5384SStefan Weinhuber switch (basepriv->rdc_data.dev_type) { 2818f3eb5384SStefan Weinhuber case 0x3390: 2819f3eb5384SStefan Weinhuber dn = ceil_quot(blksize + 6, 232); 2820f3eb5384SStefan Weinhuber d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); 2821f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 2822f3eb5384SStefan Weinhuber break; 2823f3eb5384SStefan Weinhuber case 0x3380: 2824f3eb5384SStefan Weinhuber d = 7 + ceil_quot(blksize + 12, 32); 2825f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 2826f3eb5384SStefan Weinhuber break; 2827f3eb5384SStefan Weinhuber } 2828f3eb5384SStefan Weinhuber } 2829f3eb5384SStefan Weinhuber 2830f3eb5384SStefan Weinhuber lredata->auxiliary.length_valid = 1; 2831f3eb5384SStefan Weinhuber lredata->auxiliary.length_scope = 1; 2832f3eb5384SStefan Weinhuber lredata->auxiliary.imbedded_ccw_valid = 1; 2833f3eb5384SStefan Weinhuber lredata->length = tlf; 2834f3eb5384SStefan Weinhuber lredata->imbedded_ccw = cmd; 2835f3eb5384SStefan Weinhuber lredata->count = count; 2836f3eb5384SStefan Weinhuber lredata->sector = sector; 2837f3eb5384SStefan Weinhuber set_ch_t(&lredata->seek_addr, begcyl, beghead); 2838f3eb5384SStefan Weinhuber lredata->search_arg.cyl = lredata->seek_addr.cyl; 2839f3eb5384SStefan Weinhuber lredata->search_arg.head = lredata->seek_addr.head; 2840f3eb5384SStefan Weinhuber lredata->search_arg.record = rec_on_trk; 2841f3eb5384SStefan Weinhuber 2842f3eb5384SStefan Weinhuber dcw = itcw_add_dcw(itcw, pfx_cmd, 0, 2843f3eb5384SStefan Weinhuber &pfxdata, sizeof(pfxdata), total_data_size); 2844364c18d8SHeiko Carstens return IS_ERR(dcw) ? PTR_ERR(dcw) : 0; 2845f3eb5384SStefan Weinhuber } 2846f3eb5384SStefan Weinhuber 2847f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 2848f3eb5384SStefan Weinhuber struct dasd_device *startdev, 2849f3eb5384SStefan Weinhuber struct dasd_block *block, 2850f3eb5384SStefan Weinhuber struct request *req, 2851f3eb5384SStefan Weinhuber sector_t first_rec, 2852f3eb5384SStefan Weinhuber sector_t last_rec, 2853f3eb5384SStefan Weinhuber sector_t first_trk, 2854f3eb5384SStefan Weinhuber sector_t last_trk, 2855f3eb5384SStefan Weinhuber unsigned int first_offs, 2856f3eb5384SStefan Weinhuber unsigned int last_offs, 2857f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 2858f3eb5384SStefan Weinhuber unsigned int blksize) 2859f3eb5384SStefan Weinhuber { 2860f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 2861f3eb5384SStefan Weinhuber struct req_iterator iter; 2862f3eb5384SStefan Weinhuber struct bio_vec *bv; 2863f3eb5384SStefan Weinhuber char *dst; 2864f3eb5384SStefan Weinhuber unsigned int trkcount, ctidaw; 2865f3eb5384SStefan Weinhuber unsigned char cmd; 2866f3eb5384SStefan Weinhuber struct dasd_device *basedev; 2867f3eb5384SStefan Weinhuber unsigned int tlf; 2868f3eb5384SStefan Weinhuber struct itcw *itcw; 2869f3eb5384SStefan Weinhuber struct tidaw *last_tidaw = NULL; 2870f3eb5384SStefan Weinhuber int itcw_op; 2871f3eb5384SStefan Weinhuber size_t itcw_size; 2872ef19298bSStefan Weinhuber u8 tidaw_flags; 2873ef19298bSStefan Weinhuber unsigned int seg_len, part_len, len_to_track_end; 2874ef19298bSStefan Weinhuber unsigned char new_track; 2875ef19298bSStefan Weinhuber sector_t recid, trkid; 2876ef19298bSStefan Weinhuber unsigned int offs; 2877ef19298bSStefan Weinhuber unsigned int count, count_to_trk_end; 2878cd10502bSJulia Lawall int ret; 2879f3eb5384SStefan Weinhuber 2880f3eb5384SStefan Weinhuber basedev = block->base; 2881f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) { 2882f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 2883f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_READ; 2884f3eb5384SStefan Weinhuber } else if (rq_data_dir(req) == WRITE) { 2885f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 2886f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_WRITE; 2887f3eb5384SStefan Weinhuber } else 2888f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 2889f3eb5384SStefan Weinhuber 2890f3eb5384SStefan Weinhuber /* trackbased I/O needs address all memory via TIDAWs, 2891f3eb5384SStefan Weinhuber * not just for 64 bit addresses. This allows us to map 2892f3eb5384SStefan Weinhuber * each segment directly to one tidaw. 2893ef19298bSStefan Weinhuber * In the case of write requests, additional tidaws may 2894ef19298bSStefan Weinhuber * be needed when a segment crosses a track boundary. 2895f3eb5384SStefan Weinhuber */ 2896f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 2897f3eb5384SStefan Weinhuber ctidaw = 0; 2898f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 2899f3eb5384SStefan Weinhuber ++ctidaw; 2900f3eb5384SStefan Weinhuber } 2901ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 2902ef19298bSStefan Weinhuber ctidaw += (last_trk - first_trk); 2903f3eb5384SStefan Weinhuber 2904f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 2905f3eb5384SStefan Weinhuber itcw_size = itcw_calc_size(0, ctidaw, 0); 290668b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 2907f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 2908f3eb5384SStefan Weinhuber return cqr; 2909f3eb5384SStefan Weinhuber 2910f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 2911f3eb5384SStefan Weinhuber if (first_trk == last_trk) 2912f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 2913f3eb5384SStefan Weinhuber else 2914f3eb5384SStefan Weinhuber tlf = last_offs + 1; 2915f3eb5384SStefan Weinhuber tlf *= blksize; 2916f3eb5384SStefan Weinhuber 2917f3eb5384SStefan Weinhuber itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); 2918ef19298bSStefan Weinhuber if (IS_ERR(itcw)) { 2919cd10502bSJulia Lawall ret = -EINVAL; 2920cd10502bSJulia Lawall goto out_error; 2921ef19298bSStefan Weinhuber } 2922f3eb5384SStefan Weinhuber cqr->cpaddr = itcw_get_tcw(itcw); 2923f3eb5384SStefan Weinhuber if (prepare_itcw(itcw, first_trk, last_trk, 2924f3eb5384SStefan Weinhuber cmd, basedev, startdev, 2925f3eb5384SStefan Weinhuber first_offs + 1, 2926f3eb5384SStefan Weinhuber trkcount, blksize, 2927f3eb5384SStefan Weinhuber (last_rec - first_rec + 1) * blksize, 2928f3eb5384SStefan Weinhuber tlf, blk_per_trk) == -EAGAIN) { 2929f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 2930f3eb5384SStefan Weinhuber * Try again later. 2931f3eb5384SStefan Weinhuber */ 2932cd10502bSJulia Lawall ret = -EAGAIN; 2933cd10502bSJulia Lawall goto out_error; 2934f3eb5384SStefan Weinhuber } 2935d54cddb6SHeiko Carstens len_to_track_end = 0; 2936f3eb5384SStefan Weinhuber /* 2937f3eb5384SStefan Weinhuber * A tidaw can address 4k of memory, but must not cross page boundaries 2938f3eb5384SStefan Weinhuber * We can let the block layer handle this by setting 2939f3eb5384SStefan Weinhuber * blk_queue_segment_boundary to page boundaries and 2940f3eb5384SStefan Weinhuber * blk_max_segment_size to page size when setting up the request queue. 2941ef19298bSStefan Weinhuber * For write requests, a TIDAW must not cross track boundaries, because 2942ef19298bSStefan Weinhuber * we have to set the CBC flag on the last tidaw for each track. 2943f3eb5384SStefan Weinhuber */ 2944ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) { 2945ef19298bSStefan Weinhuber new_track = 1; 2946ef19298bSStefan Weinhuber recid = first_rec; 2947f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 2948f3eb5384SStefan Weinhuber dst = page_address(bv->bv_page) + bv->bv_offset; 2949ef19298bSStefan Weinhuber seg_len = bv->bv_len; 2950ef19298bSStefan Weinhuber while (seg_len) { 2951ef19298bSStefan Weinhuber if (new_track) { 2952ef19298bSStefan Weinhuber trkid = recid; 2953ef19298bSStefan Weinhuber offs = sector_div(trkid, blk_per_trk); 2954ef19298bSStefan Weinhuber count_to_trk_end = blk_per_trk - offs; 2955ef19298bSStefan Weinhuber count = min((last_rec - recid + 1), 2956ef19298bSStefan Weinhuber (sector_t)count_to_trk_end); 2957ef19298bSStefan Weinhuber len_to_track_end = count * blksize; 2958ef19298bSStefan Weinhuber recid += count; 2959ef19298bSStefan Weinhuber new_track = 0; 2960f3eb5384SStefan Weinhuber } 2961ef19298bSStefan Weinhuber part_len = min(seg_len, len_to_track_end); 2962ef19298bSStefan Weinhuber seg_len -= part_len; 2963ef19298bSStefan Weinhuber len_to_track_end -= part_len; 2964ef19298bSStefan Weinhuber /* We need to end the tidaw at track end */ 2965ef19298bSStefan Weinhuber if (!len_to_track_end) { 2966ef19298bSStefan Weinhuber new_track = 1; 2967ef19298bSStefan Weinhuber tidaw_flags = TIDAW_FLAGS_INSERT_CBC; 2968ef19298bSStefan Weinhuber } else 2969ef19298bSStefan Weinhuber tidaw_flags = 0; 2970ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, 2971ef19298bSStefan Weinhuber dst, part_len); 2972cd10502bSJulia Lawall if (IS_ERR(last_tidaw)) { 2973cd10502bSJulia Lawall ret = -EINVAL; 2974cd10502bSJulia Lawall goto out_error; 2975cd10502bSJulia Lawall } 2976ef19298bSStefan Weinhuber dst += part_len; 2977ef19298bSStefan Weinhuber } 2978ef19298bSStefan Weinhuber } 2979ef19298bSStefan Weinhuber } else { 2980ef19298bSStefan Weinhuber rq_for_each_segment(bv, req, iter) { 2981ef19298bSStefan Weinhuber dst = page_address(bv->bv_page) + bv->bv_offset; 2982ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, 0x00, 2983ef19298bSStefan Weinhuber dst, bv->bv_len); 2984cd10502bSJulia Lawall if (IS_ERR(last_tidaw)) { 2985cd10502bSJulia Lawall ret = -EINVAL; 2986cd10502bSJulia Lawall goto out_error; 2987cd10502bSJulia Lawall } 2988ef19298bSStefan Weinhuber } 2989ef19298bSStefan Weinhuber } 2990ef19298bSStefan Weinhuber last_tidaw->flags |= TIDAW_FLAGS_LAST; 2991ef19298bSStefan Weinhuber last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; 2992f3eb5384SStefan Weinhuber itcw_finalize(itcw); 2993f3eb5384SStefan Weinhuber 2994f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 2995f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 2996f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2997ef19298bSStefan Weinhuber cqr->cpmode = 1; 2998f3eb5384SStefan Weinhuber cqr->startdev = startdev; 2999f3eb5384SStefan Weinhuber cqr->memdev = startdev; 3000f3eb5384SStefan Weinhuber cqr->block = block; 30017c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 3002a4d26c6aSStefan Weinhuber cqr->lpm = startdev->path_data.ppm; 3003f3eb5384SStefan Weinhuber cqr->retries = 256; 30041aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 3005f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 3006f3eb5384SStefan Weinhuber return cqr; 3007cd10502bSJulia Lawall out_error: 3008cd10502bSJulia Lawall dasd_sfree_request(cqr, startdev); 3009cd10502bSJulia Lawall return ERR_PTR(ret); 3010f3eb5384SStefan Weinhuber } 3011f3eb5384SStefan Weinhuber 3012f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 3013f3eb5384SStefan Weinhuber struct dasd_block *block, 3014f3eb5384SStefan Weinhuber struct request *req) 3015f3eb5384SStefan Weinhuber { 3016ef19298bSStefan Weinhuber int cmdrtd, cmdwtd; 3017f3eb5384SStefan Weinhuber int use_prefix; 3018ef19298bSStefan Weinhuber int fcx_multitrack; 301945b44d76SStefan Weinhuber struct dasd_eckd_private *private; 3020f3eb5384SStefan Weinhuber struct dasd_device *basedev; 3021f3eb5384SStefan Weinhuber sector_t first_rec, last_rec; 3022f3eb5384SStefan Weinhuber sector_t first_trk, last_trk; 3023f3eb5384SStefan Weinhuber unsigned int first_offs, last_offs; 3024f3eb5384SStefan Weinhuber unsigned int blk_per_trk, blksize; 3025f3eb5384SStefan Weinhuber int cdlspecial; 3026ef19298bSStefan Weinhuber unsigned int data_size; 3027f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 3028f3eb5384SStefan Weinhuber 3029f3eb5384SStefan Weinhuber basedev = block->base; 3030f3eb5384SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 3031f3eb5384SStefan Weinhuber 3032f3eb5384SStefan Weinhuber /* Calculate number of blocks/records per track. */ 3033f3eb5384SStefan Weinhuber blksize = block->bp_block; 3034f3eb5384SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 30356fca97a9SStefan Haberland if (blk_per_trk == 0) 30366fca97a9SStefan Haberland return ERR_PTR(-EINVAL); 3037f3eb5384SStefan Weinhuber /* Calculate record id of first and last block. */ 303883096ebfSTejun Heo first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; 3039f3eb5384SStefan Weinhuber first_offs = sector_div(first_trk, blk_per_trk); 3040f3eb5384SStefan Weinhuber last_rec = last_trk = 304183096ebfSTejun Heo (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 3042f3eb5384SStefan Weinhuber last_offs = sector_div(last_trk, blk_per_trk); 3043f3eb5384SStefan Weinhuber cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); 3044f3eb5384SStefan Weinhuber 3045ef19298bSStefan Weinhuber fcx_multitrack = private->features.feature[40] & 0x20; 3046ef19298bSStefan Weinhuber data_size = blk_rq_bytes(req); 3047ef19298bSStefan Weinhuber /* tpm write request add CBC data on each track boundary */ 3048ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 3049ef19298bSStefan Weinhuber data_size += (last_trk - first_trk) * 4; 3050f3eb5384SStefan Weinhuber 3051f3eb5384SStefan Weinhuber /* is read track data and write track data in command mode supported? */ 3052f3eb5384SStefan Weinhuber cmdrtd = private->features.feature[9] & 0x20; 3053f3eb5384SStefan Weinhuber cmdwtd = private->features.feature[12] & 0x40; 3054f3eb5384SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 3055f3eb5384SStefan Weinhuber 3056f3eb5384SStefan Weinhuber cqr = NULL; 3057f3eb5384SStefan Weinhuber if (cdlspecial || dasd_page_cache) { 3058f3eb5384SStefan Weinhuber /* do nothing, just fall through to the cmd mode single case */ 3059ef19298bSStefan Weinhuber } else if ((data_size <= private->fcx_max_data) 3060ef19298bSStefan Weinhuber && (fcx_multitrack || (first_trk == last_trk))) { 3061f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, 3062f3eb5384SStefan Weinhuber first_rec, last_rec, 3063f3eb5384SStefan Weinhuber first_trk, last_trk, 3064f3eb5384SStefan Weinhuber first_offs, last_offs, 3065f3eb5384SStefan Weinhuber blk_per_trk, blksize); 3066ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3067ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 3068f3eb5384SStefan Weinhuber cqr = NULL; 3069f3eb5384SStefan Weinhuber } else if (use_prefix && 3070f3eb5384SStefan Weinhuber (((rq_data_dir(req) == READ) && cmdrtd) || 3071f3eb5384SStefan Weinhuber ((rq_data_dir(req) == WRITE) && cmdwtd))) { 3072f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, 3073f3eb5384SStefan Weinhuber first_rec, last_rec, 3074f3eb5384SStefan Weinhuber first_trk, last_trk, 3075f3eb5384SStefan Weinhuber first_offs, last_offs, 3076f3eb5384SStefan Weinhuber blk_per_trk, blksize); 3077ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3078ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 3079f3eb5384SStefan Weinhuber cqr = NULL; 3080f3eb5384SStefan Weinhuber } 3081f3eb5384SStefan Weinhuber if (!cqr) 3082f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, 3083f3eb5384SStefan Weinhuber first_rec, last_rec, 3084f3eb5384SStefan Weinhuber first_trk, last_trk, 3085f3eb5384SStefan Weinhuber first_offs, last_offs, 3086f3eb5384SStefan Weinhuber blk_per_trk, blksize); 3087f3eb5384SStefan Weinhuber return cqr; 3088f3eb5384SStefan Weinhuber } 3089f3eb5384SStefan Weinhuber 3090e4dbb0f2SStefan Haberland static struct dasd_ccw_req *dasd_raw_build_cp(struct dasd_device *startdev, 3091e4dbb0f2SStefan Haberland struct dasd_block *block, 3092e4dbb0f2SStefan Haberland struct request *req) 3093e4dbb0f2SStefan Haberland { 3094e4dbb0f2SStefan Haberland unsigned long *idaws; 3095e4dbb0f2SStefan Haberland struct dasd_device *basedev; 3096e4dbb0f2SStefan Haberland struct dasd_ccw_req *cqr; 3097e4dbb0f2SStefan Haberland struct ccw1 *ccw; 3098e4dbb0f2SStefan Haberland struct req_iterator iter; 3099e4dbb0f2SStefan Haberland struct bio_vec *bv; 3100e4dbb0f2SStefan Haberland char *dst; 3101e4dbb0f2SStefan Haberland unsigned char cmd; 3102e4dbb0f2SStefan Haberland unsigned int trkcount; 3103e4dbb0f2SStefan Haberland unsigned int seg_len, len_to_track_end; 3104e4dbb0f2SStefan Haberland unsigned int first_offs; 3105e4dbb0f2SStefan Haberland unsigned int cidaw, cplength, datasize; 3106e4dbb0f2SStefan Haberland sector_t first_trk, last_trk; 3107e4dbb0f2SStefan Haberland unsigned int pfx_datasize; 3108e4dbb0f2SStefan Haberland 3109e4dbb0f2SStefan Haberland /* 3110e4dbb0f2SStefan Haberland * raw track access needs to be mutiple of 64k and on 64k boundary 3111e4dbb0f2SStefan Haberland */ 3112e4dbb0f2SStefan Haberland if ((blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK) != 0) { 3113e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EINVAL); 3114e4dbb0f2SStefan Haberland goto out; 3115e4dbb0f2SStefan Haberland } 3116e4dbb0f2SStefan Haberland if (((blk_rq_pos(req) + blk_rq_sectors(req)) % 3117e4dbb0f2SStefan Haberland DASD_RAW_SECTORS_PER_TRACK) != 0) { 3118e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EINVAL); 3119e4dbb0f2SStefan Haberland goto out; 3120e4dbb0f2SStefan Haberland } 3121e4dbb0f2SStefan Haberland 3122e4dbb0f2SStefan Haberland first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; 3123e4dbb0f2SStefan Haberland last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / 3124e4dbb0f2SStefan Haberland DASD_RAW_SECTORS_PER_TRACK; 3125e4dbb0f2SStefan Haberland trkcount = last_trk - first_trk + 1; 3126e4dbb0f2SStefan Haberland first_offs = 0; 3127e4dbb0f2SStefan Haberland basedev = block->base; 3128e4dbb0f2SStefan Haberland 3129e4dbb0f2SStefan Haberland if (rq_data_dir(req) == READ) 3130e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_READ_TRACK; 3131e4dbb0f2SStefan Haberland else if (rq_data_dir(req) == WRITE) 3132e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; 3133e4dbb0f2SStefan Haberland else { 3134e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EINVAL); 3135e4dbb0f2SStefan Haberland goto out; 3136e4dbb0f2SStefan Haberland } 3137e4dbb0f2SStefan Haberland 3138e4dbb0f2SStefan Haberland /* 3139e4dbb0f2SStefan Haberland * Raw track based I/O needs IDAWs for each page, 3140e4dbb0f2SStefan Haberland * and not just for 64 bit addresses. 3141e4dbb0f2SStefan Haberland */ 3142e4dbb0f2SStefan Haberland cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; 3143e4dbb0f2SStefan Haberland 3144e4dbb0f2SStefan Haberland /* 1x prefix + one read/write ccw per track */ 3145e4dbb0f2SStefan Haberland cplength = 1 + trkcount; 3146e4dbb0f2SStefan Haberland 3147e4dbb0f2SStefan Haberland /* 3148e4dbb0f2SStefan Haberland * struct PFX_eckd_data has up to 2 byte as extended parameter 3149e4dbb0f2SStefan Haberland * this is needed for write full track and has to be mentioned 315025985edcSLucas De Marchi * separately 3151e4dbb0f2SStefan Haberland * add 8 instead of 2 to keep 8 byte boundary 3152e4dbb0f2SStefan Haberland */ 3153e4dbb0f2SStefan Haberland pfx_datasize = sizeof(struct PFX_eckd_data) + 8; 3154e4dbb0f2SStefan Haberland 3155e4dbb0f2SStefan Haberland datasize = pfx_datasize + cidaw * sizeof(unsigned long long); 3156e4dbb0f2SStefan Haberland 3157e4dbb0f2SStefan Haberland /* Allocate the ccw request. */ 3158e4dbb0f2SStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 3159e4dbb0f2SStefan Haberland datasize, startdev); 3160e4dbb0f2SStefan Haberland if (IS_ERR(cqr)) 3161e4dbb0f2SStefan Haberland goto out; 3162e4dbb0f2SStefan Haberland ccw = cqr->cpaddr; 3163e4dbb0f2SStefan Haberland 3164e4dbb0f2SStefan Haberland if (prefix_LRE(ccw++, cqr->data, first_trk, last_trk, cmd, 3165e4dbb0f2SStefan Haberland basedev, startdev, 1 /* format */, first_offs + 1, 3166e4dbb0f2SStefan Haberland trkcount, 0, 0) == -EAGAIN) { 3167e4dbb0f2SStefan Haberland /* Clock not in sync and XRC is enabled. 3168e4dbb0f2SStefan Haberland * Try again later. 3169e4dbb0f2SStefan Haberland */ 3170e4dbb0f2SStefan Haberland dasd_sfree_request(cqr, startdev); 3171e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EAGAIN); 3172e4dbb0f2SStefan Haberland goto out; 3173e4dbb0f2SStefan Haberland } 3174e4dbb0f2SStefan Haberland 3175e4dbb0f2SStefan Haberland idaws = (unsigned long *)(cqr->data + pfx_datasize); 3176e4dbb0f2SStefan Haberland 3177e4dbb0f2SStefan Haberland len_to_track_end = 0; 3178e4dbb0f2SStefan Haberland 3179e4dbb0f2SStefan Haberland rq_for_each_segment(bv, req, iter) { 3180e4dbb0f2SStefan Haberland dst = page_address(bv->bv_page) + bv->bv_offset; 3181e4dbb0f2SStefan Haberland seg_len = bv->bv_len; 3182e4dbb0f2SStefan Haberland if (!len_to_track_end) { 3183e4dbb0f2SStefan Haberland ccw[-1].flags |= CCW_FLAG_CC; 3184e4dbb0f2SStefan Haberland ccw->cmd_code = cmd; 3185e4dbb0f2SStefan Haberland /* maximum 3390 track size */ 3186e4dbb0f2SStefan Haberland ccw->count = 57326; 3187e4dbb0f2SStefan Haberland /* 64k map to one track */ 3188e4dbb0f2SStefan Haberland len_to_track_end = 65536; 3189e4dbb0f2SStefan Haberland ccw->cda = (__u32)(addr_t)idaws; 3190e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_IDA; 3191e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 3192e4dbb0f2SStefan Haberland ccw++; 3193e4dbb0f2SStefan Haberland } 3194e4dbb0f2SStefan Haberland len_to_track_end -= seg_len; 3195e4dbb0f2SStefan Haberland idaws = idal_create_words(idaws, dst, seg_len); 3196e4dbb0f2SStefan Haberland } 3197e4dbb0f2SStefan Haberland 3198e4dbb0f2SStefan Haberland if (blk_noretry_request(req) || 3199e4dbb0f2SStefan Haberland block->base->features & DASD_FEATURE_FAILFAST) 3200e4dbb0f2SStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3201e4dbb0f2SStefan Haberland cqr->startdev = startdev; 3202e4dbb0f2SStefan Haberland cqr->memdev = startdev; 3203e4dbb0f2SStefan Haberland cqr->block = block; 3204e4dbb0f2SStefan Haberland cqr->expires = startdev->default_expires * HZ; 3205e4dbb0f2SStefan Haberland cqr->lpm = startdev->path_data.ppm; 3206e4dbb0f2SStefan Haberland cqr->retries = 256; 32071aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 3208e4dbb0f2SStefan Haberland cqr->status = DASD_CQR_FILLED; 3209e4dbb0f2SStefan Haberland 3210e4dbb0f2SStefan Haberland if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN) 3211e4dbb0f2SStefan Haberland cqr = NULL; 3212e4dbb0f2SStefan Haberland out: 3213e4dbb0f2SStefan Haberland return cqr; 3214e4dbb0f2SStefan Haberland } 3215e4dbb0f2SStefan Haberland 3216e4dbb0f2SStefan Haberland 32171da177e4SLinus Torvalds static int 32181da177e4SLinus Torvalds dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 32191da177e4SLinus Torvalds { 32201da177e4SLinus Torvalds struct dasd_eckd_private *private; 32211da177e4SLinus Torvalds struct ccw1 *ccw; 32225705f702SNeilBrown struct req_iterator iter; 32231da177e4SLinus Torvalds struct bio_vec *bv; 32241da177e4SLinus Torvalds char *dst, *cda; 32251da177e4SLinus Torvalds unsigned int blksize, blk_per_trk, off; 32261da177e4SLinus Torvalds sector_t recid; 32275705f702SNeilBrown int status; 32281da177e4SLinus Torvalds 32291da177e4SLinus Torvalds if (!dasd_page_cache) 32301da177e4SLinus Torvalds goto out; 32318e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) cqr->block->base->private; 32328e09f215SStefan Weinhuber blksize = cqr->block->bp_block; 32331da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 323483096ebfSTejun Heo recid = blk_rq_pos(req) >> cqr->block->s2b_shift; 32351da177e4SLinus Torvalds ccw = cqr->cpaddr; 32361da177e4SLinus Torvalds /* Skip over define extent & locate record. */ 32371da177e4SLinus Torvalds ccw++; 32381da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 32391da177e4SLinus Torvalds ccw++; 32405705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 32411da177e4SLinus Torvalds dst = page_address(bv->bv_page) + bv->bv_offset; 32421da177e4SLinus Torvalds for (off = 0; off < bv->bv_len; off += blksize) { 32431da177e4SLinus Torvalds /* Skip locate record. */ 32441da177e4SLinus Torvalds if (private->uses_cdl && recid <= 2*blk_per_trk) 32451da177e4SLinus Torvalds ccw++; 32461da177e4SLinus Torvalds if (dst) { 32471da177e4SLinus Torvalds if (ccw->flags & CCW_FLAG_IDA) 32481da177e4SLinus Torvalds cda = *((char **)((addr_t) ccw->cda)); 32491da177e4SLinus Torvalds else 32501da177e4SLinus Torvalds cda = (char *)((addr_t) ccw->cda); 32511da177e4SLinus Torvalds if (dst != cda) { 32521da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 32531da177e4SLinus Torvalds memcpy(dst, cda, bv->bv_len); 32541da177e4SLinus Torvalds kmem_cache_free(dasd_page_cache, 32551da177e4SLinus Torvalds (void *)((addr_t)cda & PAGE_MASK)); 32561da177e4SLinus Torvalds } 32571da177e4SLinus Torvalds dst = NULL; 32581da177e4SLinus Torvalds } 32591da177e4SLinus Torvalds ccw++; 32601da177e4SLinus Torvalds recid++; 32611da177e4SLinus Torvalds } 32621da177e4SLinus Torvalds } 32631da177e4SLinus Torvalds out: 32641da177e4SLinus Torvalds status = cqr->status == DASD_CQR_DONE; 32658e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 32661da177e4SLinus Torvalds return status; 32671da177e4SLinus Torvalds } 32681da177e4SLinus Torvalds 32698e09f215SStefan Weinhuber /* 3270f3eb5384SStefan Weinhuber * Modify ccw/tcw in cqr so it can be started on a base device. 32718e09f215SStefan Weinhuber * 32728e09f215SStefan Weinhuber * Note that this is not enough to restart the cqr! 32738e09f215SStefan Weinhuber * Either reset cqr->startdev as well (summary unit check handling) 32748e09f215SStefan Weinhuber * or restart via separate cqr (as in ERP handling). 32758e09f215SStefan Weinhuber */ 32768e09f215SStefan Weinhuber void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 32778e09f215SStefan Weinhuber { 32788e09f215SStefan Weinhuber struct ccw1 *ccw; 32798e09f215SStefan Weinhuber struct PFX_eckd_data *pfxdata; 3280f3eb5384SStefan Weinhuber struct tcw *tcw; 3281f3eb5384SStefan Weinhuber struct tccb *tccb; 3282f3eb5384SStefan Weinhuber struct dcw *dcw; 32838e09f215SStefan Weinhuber 3284f3eb5384SStefan Weinhuber if (cqr->cpmode == 1) { 3285f3eb5384SStefan Weinhuber tcw = cqr->cpaddr; 3286f3eb5384SStefan Weinhuber tccb = tcw_get_tccb(tcw); 3287f3eb5384SStefan Weinhuber dcw = (struct dcw *)&tccb->tca[0]; 3288f3eb5384SStefan Weinhuber pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; 3289f3eb5384SStefan Weinhuber pfxdata->validity.verify_base = 0; 3290f3eb5384SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 3291f3eb5384SStefan Weinhuber } else { 32928e09f215SStefan Weinhuber ccw = cqr->cpaddr; 32938e09f215SStefan Weinhuber pfxdata = cqr->data; 32948e09f215SStefan Weinhuber if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 32958e09f215SStefan Weinhuber pfxdata->validity.verify_base = 0; 32968e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 32978e09f215SStefan Weinhuber } 32988e09f215SStefan Weinhuber } 3299f3eb5384SStefan Weinhuber } 33008e09f215SStefan Weinhuber 33018e09f215SStefan Weinhuber #define DASD_ECKD_CHANQ_MAX_SIZE 4 33028e09f215SStefan Weinhuber 33038e09f215SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 33048e09f215SStefan Weinhuber struct dasd_block *block, 33058e09f215SStefan Weinhuber struct request *req) 33068e09f215SStefan Weinhuber { 33078e09f215SStefan Weinhuber struct dasd_eckd_private *private; 33088e09f215SStefan Weinhuber struct dasd_device *startdev; 33098e09f215SStefan Weinhuber unsigned long flags; 33108e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 33118e09f215SStefan Weinhuber 33128e09f215SStefan Weinhuber startdev = dasd_alias_get_start_dev(base); 33138e09f215SStefan Weinhuber if (!startdev) 33148e09f215SStefan Weinhuber startdev = base; 33158e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) startdev->private; 33168e09f215SStefan Weinhuber if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 33178e09f215SStefan Weinhuber return ERR_PTR(-EBUSY); 33188e09f215SStefan Weinhuber 33198e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 33208e09f215SStefan Weinhuber private->count++; 3321e4dbb0f2SStefan Haberland if ((base->features & DASD_FEATURE_USERAW)) 3322e4dbb0f2SStefan Haberland cqr = dasd_raw_build_cp(startdev, block, req); 3323e4dbb0f2SStefan Haberland else 33248e09f215SStefan Weinhuber cqr = dasd_eckd_build_cp(startdev, block, req); 33258e09f215SStefan Weinhuber if (IS_ERR(cqr)) 33268e09f215SStefan Weinhuber private->count--; 33278e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 33288e09f215SStefan Weinhuber return cqr; 33298e09f215SStefan Weinhuber } 33308e09f215SStefan Weinhuber 33318e09f215SStefan Weinhuber static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 33328e09f215SStefan Weinhuber struct request *req) 33338e09f215SStefan Weinhuber { 33348e09f215SStefan Weinhuber struct dasd_eckd_private *private; 33358e09f215SStefan Weinhuber unsigned long flags; 33368e09f215SStefan Weinhuber 33378e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 33388e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) cqr->memdev->private; 33398e09f215SStefan Weinhuber private->count--; 33408e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 33418e09f215SStefan Weinhuber return dasd_eckd_free_cp(cqr, req); 33428e09f215SStefan Weinhuber } 33438e09f215SStefan Weinhuber 33441da177e4SLinus Torvalds static int 33451da177e4SLinus Torvalds dasd_eckd_fill_info(struct dasd_device * device, 33461da177e4SLinus Torvalds struct dasd_information2_t * info) 33471da177e4SLinus Torvalds { 33481da177e4SLinus Torvalds struct dasd_eckd_private *private; 33491da177e4SLinus Torvalds 33501da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 33511da177e4SLinus Torvalds info->label_block = 2; 33521da177e4SLinus Torvalds info->FBA_layout = private->uses_cdl ? 0 : 1; 33531da177e4SLinus Torvalds info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 33541da177e4SLinus Torvalds info->characteristics_size = sizeof(struct dasd_eckd_characteristics); 33551da177e4SLinus Torvalds memcpy(info->characteristics, &private->rdc_data, 33561da177e4SLinus Torvalds sizeof(struct dasd_eckd_characteristics)); 33574abb08c2SStefan Weinhuber info->confdata_size = min((unsigned long)private->conf_len, 33584abb08c2SStefan Weinhuber sizeof(info->configuration_data)); 33594abb08c2SStefan Weinhuber memcpy(info->configuration_data, private->conf_data, 33604abb08c2SStefan Weinhuber info->confdata_size); 33611da177e4SLinus Torvalds return 0; 33621da177e4SLinus Torvalds } 33631da177e4SLinus Torvalds 33641da177e4SLinus Torvalds /* 33651da177e4SLinus Torvalds * SECTION: ioctl functions for eckd devices. 33661da177e4SLinus Torvalds */ 33671da177e4SLinus Torvalds 33681da177e4SLinus Torvalds /* 33691da177e4SLinus Torvalds * Release device ioctl. 33701da177e4SLinus Torvalds * Buils a channel programm to releases a prior reserved 33711da177e4SLinus Torvalds * (see dasd_eckd_reserve) device. 33721da177e4SLinus Torvalds */ 33731da177e4SLinus Torvalds static int 33741107ccfbSChristoph Hellwig dasd_eckd_release(struct dasd_device *device) 33751da177e4SLinus Torvalds { 33761da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 33771da177e4SLinus Torvalds int rc; 3378f3eb5384SStefan Weinhuber struct ccw1 *ccw; 3379f932bceaSStefan Weinhuber int useglobal; 33801da177e4SLinus Torvalds 33811da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 33821da177e4SLinus Torvalds return -EACCES; 33831da177e4SLinus Torvalds 3384f932bceaSStefan Weinhuber useglobal = 0; 338568b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 33861da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3387f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3388f932bceaSStefan Weinhuber useglobal = 1; 3389f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3390f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3391f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3392f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3393f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3394f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3395f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 33961da177e4SLinus Torvalds } 3397f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 3398f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RELEASE; 3399f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3400f3eb5384SStefan Weinhuber ccw->count = 32; 3401f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 34028e09f215SStefan Weinhuber cqr->startdev = device; 34038e09f215SStefan Weinhuber cqr->memdev = device; 34041da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 34051c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3406336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 34071da177e4SLinus Torvalds cqr->expires = 2 * HZ; 34081aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 34091da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 34101da177e4SLinus Torvalds 34111da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 34125a27e60dSStefan Weinhuber if (!rc) 34135a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 34141da177e4SLinus Torvalds 3415f932bceaSStefan Weinhuber if (useglobal) 3416f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3417f932bceaSStefan Weinhuber else 34188e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 34191da177e4SLinus Torvalds return rc; 34201da177e4SLinus Torvalds } 34211da177e4SLinus Torvalds 34221da177e4SLinus Torvalds /* 34231da177e4SLinus Torvalds * Reserve device ioctl. 34241da177e4SLinus Torvalds * Options are set to 'synchronous wait for interrupt' and 34251da177e4SLinus Torvalds * 'timeout the request'. This leads to a terminate IO if 34261da177e4SLinus Torvalds * the interrupt is outstanding for a certain time. 34271da177e4SLinus Torvalds */ 34281da177e4SLinus Torvalds static int 34291107ccfbSChristoph Hellwig dasd_eckd_reserve(struct dasd_device *device) 34301da177e4SLinus Torvalds { 34311da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 34321da177e4SLinus Torvalds int rc; 3433f3eb5384SStefan Weinhuber struct ccw1 *ccw; 3434f932bceaSStefan Weinhuber int useglobal; 34351da177e4SLinus Torvalds 34361da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 34371da177e4SLinus Torvalds return -EACCES; 34381da177e4SLinus Torvalds 3439f932bceaSStefan Weinhuber useglobal = 0; 344068b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 34411da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3442f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3443f932bceaSStefan Weinhuber useglobal = 1; 3444f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3445f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3446f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3447f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3448f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3449f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3450f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 34511da177e4SLinus Torvalds } 3452f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 3453f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RESERVE; 3454f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3455f3eb5384SStefan Weinhuber ccw->count = 32; 3456f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 34578e09f215SStefan Weinhuber cqr->startdev = device; 34588e09f215SStefan Weinhuber cqr->memdev = device; 34591da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 34601c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3461336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 34621da177e4SLinus Torvalds cqr->expires = 2 * HZ; 34631aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 34641da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 34651da177e4SLinus Torvalds 34661da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 34675a27e60dSStefan Weinhuber if (!rc) 34685a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 34691da177e4SLinus Torvalds 3470f932bceaSStefan Weinhuber if (useglobal) 3471f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3472f932bceaSStefan Weinhuber else 34738e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 34741da177e4SLinus Torvalds return rc; 34751da177e4SLinus Torvalds } 34761da177e4SLinus Torvalds 34771da177e4SLinus Torvalds /* 34781da177e4SLinus Torvalds * Steal lock ioctl - unconditional reserve device. 34791da177e4SLinus Torvalds * Buils a channel programm to break a device's reservation. 34801da177e4SLinus Torvalds * (unconditional reserve) 34811da177e4SLinus Torvalds */ 34821da177e4SLinus Torvalds static int 34831107ccfbSChristoph Hellwig dasd_eckd_steal_lock(struct dasd_device *device) 34841da177e4SLinus Torvalds { 34851da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 34861da177e4SLinus Torvalds int rc; 3487f3eb5384SStefan Weinhuber struct ccw1 *ccw; 3488f932bceaSStefan Weinhuber int useglobal; 34891da177e4SLinus Torvalds 34901da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 34911da177e4SLinus Torvalds return -EACCES; 34921da177e4SLinus Torvalds 3493f932bceaSStefan Weinhuber useglobal = 0; 349468b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 34951da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3496f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3497f932bceaSStefan Weinhuber useglobal = 1; 3498f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3499f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3500f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3501f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3502f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3503f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3504f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 35051da177e4SLinus Torvalds } 3506f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 3507f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SLCK; 3508f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3509f3eb5384SStefan Weinhuber ccw->count = 32; 3510f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 35118e09f215SStefan Weinhuber cqr->startdev = device; 35128e09f215SStefan Weinhuber cqr->memdev = device; 35131da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 35141c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3515336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 35161da177e4SLinus Torvalds cqr->expires = 2 * HZ; 35171aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 35181da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 35191da177e4SLinus Torvalds 35201da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 35215a27e60dSStefan Weinhuber if (!rc) 35225a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 35231da177e4SLinus Torvalds 3524f932bceaSStefan Weinhuber if (useglobal) 3525f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3526f932bceaSStefan Weinhuber else 35278e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 35281da177e4SLinus Torvalds return rc; 35291da177e4SLinus Torvalds } 35301da177e4SLinus Torvalds 35311da177e4SLinus Torvalds /* 3532196339f1SStefan Weinhuber * SNID - Sense Path Group ID 3533196339f1SStefan Weinhuber * This ioctl may be used in situations where I/O is stalled due to 3534196339f1SStefan Weinhuber * a reserve, so if the normal dasd_smalloc_request fails, we use the 3535196339f1SStefan Weinhuber * preallocated dasd_reserve_req. 3536196339f1SStefan Weinhuber */ 3537196339f1SStefan Weinhuber static int dasd_eckd_snid(struct dasd_device *device, 3538196339f1SStefan Weinhuber void __user *argp) 3539196339f1SStefan Weinhuber { 3540196339f1SStefan Weinhuber struct dasd_ccw_req *cqr; 3541196339f1SStefan Weinhuber int rc; 3542196339f1SStefan Weinhuber struct ccw1 *ccw; 3543196339f1SStefan Weinhuber int useglobal; 3544196339f1SStefan Weinhuber struct dasd_snid_ioctl_data usrparm; 3545196339f1SStefan Weinhuber 3546196339f1SStefan Weinhuber if (!capable(CAP_SYS_ADMIN)) 3547196339f1SStefan Weinhuber return -EACCES; 3548196339f1SStefan Weinhuber 3549196339f1SStefan Weinhuber if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 3550196339f1SStefan Weinhuber return -EFAULT; 3551196339f1SStefan Weinhuber 3552196339f1SStefan Weinhuber useglobal = 0; 3553196339f1SStefan Weinhuber cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 3554196339f1SStefan Weinhuber sizeof(struct dasd_snid_data), device); 3555196339f1SStefan Weinhuber if (IS_ERR(cqr)) { 3556196339f1SStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3557196339f1SStefan Weinhuber useglobal = 1; 3558196339f1SStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3559196339f1SStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3560196339f1SStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3561196339f1SStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3562196339f1SStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3563196339f1SStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3564196339f1SStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 3565196339f1SStefan Weinhuber } 3566196339f1SStefan Weinhuber ccw = cqr->cpaddr; 3567196339f1SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SNID; 3568196339f1SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3569196339f1SStefan Weinhuber ccw->count = 12; 3570196339f1SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 3571196339f1SStefan Weinhuber cqr->startdev = device; 3572196339f1SStefan Weinhuber cqr->memdev = device; 3573196339f1SStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3574196339f1SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 35755a27e60dSStefan Weinhuber set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 3576196339f1SStefan Weinhuber cqr->retries = 5; 3577196339f1SStefan Weinhuber cqr->expires = 10 * HZ; 35781aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 3579196339f1SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 3580196339f1SStefan Weinhuber cqr->lpm = usrparm.path_mask; 3581196339f1SStefan Weinhuber 3582196339f1SStefan Weinhuber rc = dasd_sleep_on_immediatly(cqr); 3583196339f1SStefan Weinhuber /* verify that I/O processing didn't modify the path mask */ 3584196339f1SStefan Weinhuber if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) 3585196339f1SStefan Weinhuber rc = -EIO; 3586196339f1SStefan Weinhuber if (!rc) { 3587196339f1SStefan Weinhuber usrparm.data = *((struct dasd_snid_data *)cqr->data); 3588196339f1SStefan Weinhuber if (copy_to_user(argp, &usrparm, sizeof(usrparm))) 3589196339f1SStefan Weinhuber rc = -EFAULT; 3590196339f1SStefan Weinhuber } 3591196339f1SStefan Weinhuber 3592196339f1SStefan Weinhuber if (useglobal) 3593196339f1SStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3594196339f1SStefan Weinhuber else 3595196339f1SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 3596196339f1SStefan Weinhuber return rc; 3597196339f1SStefan Weinhuber } 3598196339f1SStefan Weinhuber 3599196339f1SStefan Weinhuber /* 36001da177e4SLinus Torvalds * Read performance statistics 36011da177e4SLinus Torvalds */ 36021da177e4SLinus Torvalds static int 36031107ccfbSChristoph Hellwig dasd_eckd_performance(struct dasd_device *device, void __user *argp) 36041da177e4SLinus Torvalds { 36051da177e4SLinus Torvalds struct dasd_psf_prssd_data *prssdp; 36061da177e4SLinus Torvalds struct dasd_rssd_perf_stats_t *stats; 36071da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 36081da177e4SLinus Torvalds struct ccw1 *ccw; 36091da177e4SLinus Torvalds int rc; 36101da177e4SLinus Torvalds 361168b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 36121da177e4SLinus Torvalds (sizeof(struct dasd_psf_prssd_data) + 36131da177e4SLinus Torvalds sizeof(struct dasd_rssd_perf_stats_t)), 36141da177e4SLinus Torvalds device); 36151da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3616fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 36171da177e4SLinus Torvalds "Could not allocate initialization request"); 36181da177e4SLinus Torvalds return PTR_ERR(cqr); 36191da177e4SLinus Torvalds } 36208e09f215SStefan Weinhuber cqr->startdev = device; 36218e09f215SStefan Weinhuber cqr->memdev = device; 36221da177e4SLinus Torvalds cqr->retries = 0; 3623eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 36241da177e4SLinus Torvalds cqr->expires = 10 * HZ; 36251da177e4SLinus Torvalds 36261da177e4SLinus Torvalds /* Prepare for Read Subsystem Data */ 36271da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 36281da177e4SLinus Torvalds memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 36291da177e4SLinus Torvalds prssdp->order = PSF_ORDER_PRSSD; 36305d67d164SJoe Perches prssdp->suborder = 0x01; /* Performance Statistics */ 36311da177e4SLinus Torvalds prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 36321da177e4SLinus Torvalds 36331da177e4SLinus Torvalds ccw = cqr->cpaddr; 36341da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_PSF; 36351da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_psf_prssd_data); 36361da177e4SLinus Torvalds ccw->flags |= CCW_FLAG_CC; 36371da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) prssdp; 36381da177e4SLinus Torvalds 36391da177e4SLinus Torvalds /* Read Subsystem Data - Performance Statistics */ 36401da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 36411da177e4SLinus Torvalds memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 36421da177e4SLinus Torvalds 36431da177e4SLinus Torvalds ccw++; 36441da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_RSSD; 36451da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 36461da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) stats; 36471da177e4SLinus Torvalds 36481aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 36491da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 36501da177e4SLinus Torvalds rc = dasd_sleep_on(cqr); 36511da177e4SLinus Torvalds if (rc == 0) { 36521da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 36531da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 36541107ccfbSChristoph Hellwig if (copy_to_user(argp, stats, 36551107ccfbSChristoph Hellwig sizeof(struct dasd_rssd_perf_stats_t))) 36561107ccfbSChristoph Hellwig rc = -EFAULT; 36571da177e4SLinus Torvalds } 36588e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 36591da177e4SLinus Torvalds return rc; 36601da177e4SLinus Torvalds } 36611da177e4SLinus Torvalds 36621da177e4SLinus Torvalds /* 36631da177e4SLinus Torvalds * Get attributes (cache operations) 36641da177e4SLinus Torvalds * Returnes the cache attributes used in Define Extend (DE). 36651da177e4SLinus Torvalds */ 36661da177e4SLinus Torvalds static int 36671107ccfbSChristoph Hellwig dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 36681da177e4SLinus Torvalds { 36691107ccfbSChristoph Hellwig struct dasd_eckd_private *private = 36701107ccfbSChristoph Hellwig (struct dasd_eckd_private *)device->private; 36711107ccfbSChristoph Hellwig struct attrib_data_t attrib = private->attrib; 36721da177e4SLinus Torvalds int rc; 36731da177e4SLinus Torvalds 36741da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 36751da177e4SLinus Torvalds return -EACCES; 36761107ccfbSChristoph Hellwig if (!argp) 36771da177e4SLinus Torvalds return -EINVAL; 36781da177e4SLinus Torvalds 36791107ccfbSChristoph Hellwig rc = 0; 36801107ccfbSChristoph Hellwig if (copy_to_user(argp, (long *) &attrib, 36811107ccfbSChristoph Hellwig sizeof(struct attrib_data_t))) 36821107ccfbSChristoph Hellwig rc = -EFAULT; 36831da177e4SLinus Torvalds 36841da177e4SLinus Torvalds return rc; 36851da177e4SLinus Torvalds } 36861da177e4SLinus Torvalds 36871da177e4SLinus Torvalds /* 36881da177e4SLinus Torvalds * Set attributes (cache operations) 36891da177e4SLinus Torvalds * Stores the attributes for cache operation to be used in Define Extend (DE). 36901da177e4SLinus Torvalds */ 36911da177e4SLinus Torvalds static int 36921107ccfbSChristoph Hellwig dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 36931da177e4SLinus Torvalds { 36941107ccfbSChristoph Hellwig struct dasd_eckd_private *private = 36951107ccfbSChristoph Hellwig (struct dasd_eckd_private *)device->private; 36961da177e4SLinus Torvalds struct attrib_data_t attrib; 36971da177e4SLinus Torvalds 36981da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 36991da177e4SLinus Torvalds return -EACCES; 37001107ccfbSChristoph Hellwig if (!argp) 37011da177e4SLinus Torvalds return -EINVAL; 37021da177e4SLinus Torvalds 37031107ccfbSChristoph Hellwig if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 37041da177e4SLinus Torvalds return -EFAULT; 37051da177e4SLinus Torvalds private->attrib = attrib; 37061da177e4SLinus Torvalds 3707fc19f381SStefan Haberland dev_info(&device->cdev->dev, 3708fc19f381SStefan Haberland "The DASD cache mode was set to %x (%i cylinder prestage)\n", 37091da177e4SLinus Torvalds private->attrib.operation, private->attrib.nr_cyl); 37101da177e4SLinus Torvalds return 0; 37111da177e4SLinus Torvalds } 37121da177e4SLinus Torvalds 3713ab1d848fSNigel Hislop /* 3714ab1d848fSNigel Hislop * Issue syscall I/O to EMC Symmetrix array. 3715ab1d848fSNigel Hislop * CCWs are PSF and RSSD 3716ab1d848fSNigel Hislop */ 3717ab1d848fSNigel Hislop static int dasd_symm_io(struct dasd_device *device, void __user *argp) 3718ab1d848fSNigel Hislop { 3719ab1d848fSNigel Hislop struct dasd_symmio_parms usrparm; 3720ab1d848fSNigel Hislop char *psf_data, *rssd_result; 3721ab1d848fSNigel Hislop struct dasd_ccw_req *cqr; 3722ab1d848fSNigel Hislop struct ccw1 *ccw; 372352898025SNigel Hislop char psf0, psf1; 3724ab1d848fSNigel Hislop int rc; 3725ab1d848fSNigel Hislop 372652898025SNigel Hislop if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) 372752898025SNigel Hislop return -EACCES; 372852898025SNigel Hislop psf0 = psf1 = 0; 372952898025SNigel Hislop 3730ab1d848fSNigel Hislop /* Copy parms from caller */ 3731ab1d848fSNigel Hislop rc = -EFAULT; 3732ab1d848fSNigel Hislop if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 3733ab1d848fSNigel Hislop goto out; 3734f8b06859SHeiko Carstens if (is_compat_task() || sizeof(long) == 4) { 3735ab1d848fSNigel Hislop /* Make sure pointers are sane even on 31 bit. */ 3736ab1d848fSNigel Hislop rc = -EINVAL; 3737f8b06859SHeiko Carstens if ((usrparm.psf_data >> 32) != 0) 3738ab1d848fSNigel Hislop goto out; 3739f8b06859SHeiko Carstens if ((usrparm.rssd_result >> 32) != 0) 3740f8b06859SHeiko Carstens goto out; 3741f8b06859SHeiko Carstens usrparm.psf_data &= 0x7fffffffULL; 3742f8b06859SHeiko Carstens usrparm.rssd_result &= 0x7fffffffULL; 3743ab1d848fSNigel Hislop } 3744ab1d848fSNigel Hislop /* alloc I/O data area */ 3745ab1d848fSNigel Hislop psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 3746ab1d848fSNigel Hislop rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 3747ab1d848fSNigel Hislop if (!psf_data || !rssd_result) { 3748ab1d848fSNigel Hislop rc = -ENOMEM; 3749ab1d848fSNigel Hislop goto out_free; 3750ab1d848fSNigel Hislop } 3751ab1d848fSNigel Hislop 3752ab1d848fSNigel Hislop /* get syscall header from user space */ 3753ab1d848fSNigel Hislop rc = -EFAULT; 3754ab1d848fSNigel Hislop if (copy_from_user(psf_data, 3755ab1d848fSNigel Hislop (void __user *)(unsigned long) usrparm.psf_data, 3756ab1d848fSNigel Hislop usrparm.psf_data_len)) 3757ab1d848fSNigel Hislop goto out_free; 375852898025SNigel Hislop psf0 = psf_data[0]; 375952898025SNigel Hislop psf1 = psf_data[1]; 3760ab1d848fSNigel Hislop 3761ab1d848fSNigel Hislop /* setup CCWs for PSF + RSSD */ 376268b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device); 3763ab1d848fSNigel Hislop if (IS_ERR(cqr)) { 3764fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3765ab1d848fSNigel Hislop "Could not allocate initialization request"); 3766ab1d848fSNigel Hislop rc = PTR_ERR(cqr); 3767ab1d848fSNigel Hislop goto out_free; 3768ab1d848fSNigel Hislop } 3769ab1d848fSNigel Hislop 3770ab1d848fSNigel Hislop cqr->startdev = device; 3771ab1d848fSNigel Hislop cqr->memdev = device; 3772ab1d848fSNigel Hislop cqr->retries = 3; 3773ab1d848fSNigel Hislop cqr->expires = 10 * HZ; 37741aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 3775ab1d848fSNigel Hislop cqr->status = DASD_CQR_FILLED; 3776ab1d848fSNigel Hislop 3777ab1d848fSNigel Hislop /* Build the ccws */ 3778ab1d848fSNigel Hislop ccw = cqr->cpaddr; 3779ab1d848fSNigel Hislop 3780ab1d848fSNigel Hislop /* PSF ccw */ 3781ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_PSF; 3782ab1d848fSNigel Hislop ccw->count = usrparm.psf_data_len; 3783ab1d848fSNigel Hislop ccw->flags |= CCW_FLAG_CC; 3784ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) psf_data; 3785ab1d848fSNigel Hislop 3786ab1d848fSNigel Hislop ccw++; 3787ab1d848fSNigel Hislop 3788ab1d848fSNigel Hislop /* RSSD ccw */ 3789ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_RSSD; 3790ab1d848fSNigel Hislop ccw->count = usrparm.rssd_result_len; 3791ab1d848fSNigel Hislop ccw->flags = CCW_FLAG_SLI ; 3792ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) rssd_result; 3793ab1d848fSNigel Hislop 3794ab1d848fSNigel Hislop rc = dasd_sleep_on(cqr); 3795ab1d848fSNigel Hislop if (rc) 3796ab1d848fSNigel Hislop goto out_sfree; 3797ab1d848fSNigel Hislop 3798ab1d848fSNigel Hislop rc = -EFAULT; 3799ab1d848fSNigel Hislop if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 3800ab1d848fSNigel Hislop rssd_result, usrparm.rssd_result_len)) 3801ab1d848fSNigel Hislop goto out_sfree; 3802ab1d848fSNigel Hislop rc = 0; 3803ab1d848fSNigel Hislop 3804ab1d848fSNigel Hislop out_sfree: 3805ab1d848fSNigel Hislop dasd_sfree_request(cqr, cqr->memdev); 3806ab1d848fSNigel Hislop out_free: 3807ab1d848fSNigel Hislop kfree(rssd_result); 3808ab1d848fSNigel Hislop kfree(psf_data); 3809ab1d848fSNigel Hislop out: 381052898025SNigel Hislop DBF_DEV_EVENT(DBF_WARNING, device, 381152898025SNigel Hislop "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", 381252898025SNigel Hislop (int) psf0, (int) psf1, rc); 3813ab1d848fSNigel Hislop return rc; 3814ab1d848fSNigel Hislop } 3815ab1d848fSNigel Hislop 38161107ccfbSChristoph Hellwig static int 38178e09f215SStefan Weinhuber dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 38181107ccfbSChristoph Hellwig { 38198e09f215SStefan Weinhuber struct dasd_device *device = block->base; 38208e09f215SStefan Weinhuber 38211107ccfbSChristoph Hellwig switch (cmd) { 38221107ccfbSChristoph Hellwig case BIODASDGATTR: 38231107ccfbSChristoph Hellwig return dasd_eckd_get_attrib(device, argp); 38241107ccfbSChristoph Hellwig case BIODASDSATTR: 38251107ccfbSChristoph Hellwig return dasd_eckd_set_attrib(device, argp); 38261107ccfbSChristoph Hellwig case BIODASDPSRD: 38271107ccfbSChristoph Hellwig return dasd_eckd_performance(device, argp); 38281107ccfbSChristoph Hellwig case BIODASDRLSE: 38291107ccfbSChristoph Hellwig return dasd_eckd_release(device); 38301107ccfbSChristoph Hellwig case BIODASDRSRV: 38311107ccfbSChristoph Hellwig return dasd_eckd_reserve(device); 38321107ccfbSChristoph Hellwig case BIODASDSLCK: 38331107ccfbSChristoph Hellwig return dasd_eckd_steal_lock(device); 3834196339f1SStefan Weinhuber case BIODASDSNID: 3835196339f1SStefan Weinhuber return dasd_eckd_snid(device, argp); 3836ab1d848fSNigel Hislop case BIODASDSYMMIO: 3837ab1d848fSNigel Hislop return dasd_symm_io(device, argp); 38381107ccfbSChristoph Hellwig default: 38396b79d14eSHeiko Carstens return -ENOTTY; 38401107ccfbSChristoph Hellwig } 38411107ccfbSChristoph Hellwig } 38421107ccfbSChristoph Hellwig 38431da177e4SLinus Torvalds /* 3844445b5b49SHorst Hummel * Dump the range of CCWs into 'page' buffer 3845445b5b49SHorst Hummel * and return number of printed chars. 3846445b5b49SHorst Hummel */ 38474d284cacSHeiko Carstens static int 3848445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 3849445b5b49SHorst Hummel { 3850445b5b49SHorst Hummel int len, count; 3851445b5b49SHorst Hummel char *datap; 3852445b5b49SHorst Hummel 3853445b5b49SHorst Hummel len = 0; 3854445b5b49SHorst Hummel while (from <= to) { 3855773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 3856445b5b49SHorst Hummel " CCW %p: %08X %08X DAT:", 3857445b5b49SHorst Hummel from, ((int *) from)[0], ((int *) from)[1]); 3858445b5b49SHorst Hummel 3859445b5b49SHorst Hummel /* get pointer to data (consider IDALs) */ 3860445b5b49SHorst Hummel if (from->flags & CCW_FLAG_IDA) 3861445b5b49SHorst Hummel datap = (char *) *((addr_t *) (addr_t) from->cda); 3862445b5b49SHorst Hummel else 3863445b5b49SHorst Hummel datap = (char *) ((addr_t) from->cda); 3864445b5b49SHorst Hummel 3865445b5b49SHorst Hummel /* dump data (max 32 bytes) */ 3866445b5b49SHorst Hummel for (count = 0; count < from->count && count < 32; count++) { 3867445b5b49SHorst Hummel if (count % 8 == 0) len += sprintf(page + len, " "); 3868445b5b49SHorst Hummel if (count % 4 == 0) len += sprintf(page + len, " "); 3869445b5b49SHorst Hummel len += sprintf(page + len, "%02x", datap[count]); 3870445b5b49SHorst Hummel } 3871445b5b49SHorst Hummel len += sprintf(page + len, "\n"); 3872445b5b49SHorst Hummel from++; 3873445b5b49SHorst Hummel } 3874445b5b49SHorst Hummel return len; 3875445b5b49SHorst Hummel } 3876445b5b49SHorst Hummel 3877fc19f381SStefan Haberland static void 3878aeec92caSStefan Haberland dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 3879aeec92caSStefan Haberland char *reason) 3880fc19f381SStefan Haberland { 3881fc19f381SStefan Haberland u64 *sense; 3882a5a0061fSStefan Weinhuber u64 *stat; 3883fc19f381SStefan Haberland 3884aeec92caSStefan Haberland sense = (u64 *) dasd_get_sense(irb); 3885a5a0061fSStefan Weinhuber stat = (u64 *) &irb->scsw; 3886fc19f381SStefan Haberland if (sense) { 3887a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " 3888a5a0061fSStefan Weinhuber "%016llx %016llx %016llx %016llx", 3889a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 3890ed3640b2SStefan Haberland sense[0], sense[1], sense[2], sense[3]); 3891fc19f381SStefan Haberland } else { 3892a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", 3893a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 3894a5a0061fSStefan Weinhuber "NO VALID SENSE"); 3895fc19f381SStefan Haberland } 3896fc19f381SStefan Haberland } 3897fc19f381SStefan Haberland 3898445b5b49SHorst Hummel /* 38991da177e4SLinus Torvalds * Print sense data and related channel program. 39001da177e4SLinus Torvalds * Parts are printed because printk buffer is only 1024 bytes. 39011da177e4SLinus Torvalds */ 3902f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 39038e09f215SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 39041da177e4SLinus Torvalds { 39051da177e4SLinus Torvalds char *page; 3906445b5b49SHorst Hummel struct ccw1 *first, *last, *fail, *from, *to; 3907445b5b49SHorst Hummel int len, sl, sct; 39081da177e4SLinus Torvalds 39091da177e4SLinus Torvalds page = (char *) get_zeroed_page(GFP_ATOMIC); 39101da177e4SLinus Torvalds if (page == NULL) { 3911fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3912fc19f381SStefan Haberland "No memory to dump sense data\n"); 39131da177e4SLinus Torvalds return; 39141da177e4SLinus Torvalds } 3915445b5b49SHorst Hummel /* dump the sense data */ 3916773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 39171da177e4SLinus Torvalds " I/O status report for device %s:\n", 39182a0217d5SKay Sievers dev_name(&device->cdev->dev)); 3919773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 3920a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 3921a5a0061fSStefan Weinhuber "CS:%02X RC:%d\n", 3922a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 3923a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 3924a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 3925a5a0061fSStefan Weinhuber req ? req->intrc : 0); 3926773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 39271da177e4SLinus Torvalds " device %s: Failing CCW: %p\n", 39282a0217d5SKay Sievers dev_name(&device->cdev->dev), 392923d805b6SPeter Oberparleiter (void *) (addr_t) irb->scsw.cmd.cpa); 39301da177e4SLinus Torvalds if (irb->esw.esw0.erw.cons) { 39311da177e4SLinus Torvalds for (sl = 0; sl < 4; sl++) { 3932773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 39331da177e4SLinus Torvalds " Sense(hex) %2d-%2d:", 39341da177e4SLinus Torvalds (8 * sl), ((8 * sl) + 7)); 39351da177e4SLinus Torvalds 39361da177e4SLinus Torvalds for (sct = 0; sct < 8; sct++) { 39371da177e4SLinus Torvalds len += sprintf(page + len, " %02x", 39381da177e4SLinus Torvalds irb->ecw[8 * sl + sct]); 39391da177e4SLinus Torvalds } 39401da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 39411da177e4SLinus Torvalds } 39421da177e4SLinus Torvalds 39431da177e4SLinus Torvalds if (irb->ecw[27] & DASD_SENSE_BIT_0) { 39441da177e4SLinus Torvalds /* 24 Byte Sense Data */ 3945773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 39461da177e4SLinus Torvalds " 24 Byte: %x MSG %x, " 39471da177e4SLinus Torvalds "%s MSGb to SYSOP\n", 39481da177e4SLinus Torvalds irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 39491da177e4SLinus Torvalds irb->ecw[1] & 0x10 ? "" : "no"); 39501da177e4SLinus Torvalds } else { 39511da177e4SLinus Torvalds /* 32 Byte Sense Data */ 3952773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 39531da177e4SLinus Torvalds " 32 Byte: Format: %x " 39541da177e4SLinus Torvalds "Exception class %x\n", 39551da177e4SLinus Torvalds irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 39561da177e4SLinus Torvalds } 39571da177e4SLinus Torvalds } else { 3958773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 39591da177e4SLinus Torvalds " SORRY - NO VALID SENSE AVAILABLE\n"); 39601da177e4SLinus Torvalds } 3961773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 39621da177e4SLinus Torvalds 39638e09f215SStefan Weinhuber if (req) { 39648e09f215SStefan Weinhuber /* req == NULL for unsolicited interrupts */ 3965445b5b49SHorst Hummel /* dump the Channel Program (max 140 Bytes per line) */ 3966445b5b49SHorst Hummel /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 3967445b5b49SHorst Hummel first = req->cpaddr; 3968445b5b49SHorst Hummel for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 3969445b5b49SHorst Hummel to = min(first + 6, last); 3970773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 39711da177e4SLinus Torvalds " Related CP in req: %p\n", req); 3972445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(first, to, page + len); 3973773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 39741da177e4SLinus Torvalds 3975445b5b49SHorst Hummel /* print failing CCW area (maximum 4) */ 3976445b5b49SHorst Hummel /* scsw->cda is either valid or zero */ 39771da177e4SLinus Torvalds len = 0; 3978445b5b49SHorst Hummel from = ++to; 397923d805b6SPeter Oberparleiter fail = (struct ccw1 *)(addr_t) 398023d805b6SPeter Oberparleiter irb->scsw.cmd.cpa; /* failing CCW */ 3981445b5b49SHorst Hummel if (from < fail - 2) { 3982445b5b49SHorst Hummel from = fail - 2; /* there is a gap - print header */ 3983773bab4aSSebastian Ott len += sprintf(page, PRINTK_HEADER "......\n"); 39841da177e4SLinus Torvalds } 3985445b5b49SHorst Hummel to = min(fail + 1, last); 3986445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, to, page + len); 39871da177e4SLinus Torvalds 3988445b5b49SHorst Hummel /* print last CCWs (maximum 2) */ 3989445b5b49SHorst Hummel from = max(from, ++to); 3990445b5b49SHorst Hummel if (from < last - 1) { 3991445b5b49SHorst Hummel from = last - 1; /* there is a gap - print header */ 3992773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER "......\n"); 39931da177e4SLinus Torvalds } 3994445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, last, page + len); 39951da177e4SLinus Torvalds if (len > 0) 3996773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 39978e09f215SStefan Weinhuber } 39981da177e4SLinus Torvalds free_page((unsigned long) page); 39991da177e4SLinus Torvalds } 40001da177e4SLinus Torvalds 4001f3eb5384SStefan Weinhuber 4002f3eb5384SStefan Weinhuber /* 4003f3eb5384SStefan Weinhuber * Print sense data from a tcw. 4004f3eb5384SStefan Weinhuber */ 4005f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 4006f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 4007f3eb5384SStefan Weinhuber { 4008f3eb5384SStefan Weinhuber char *page; 4009f3eb5384SStefan Weinhuber int len, sl, sct, residual; 4010f3eb5384SStefan Weinhuber struct tsb *tsb; 4011ef19298bSStefan Weinhuber u8 *sense, *rcq; 4012f3eb5384SStefan Weinhuber 4013f3eb5384SStefan Weinhuber page = (char *) get_zeroed_page(GFP_ATOMIC); 4014f3eb5384SStefan Weinhuber if (page == NULL) { 4015fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, " %s", 4016f3eb5384SStefan Weinhuber "No memory to dump sense data"); 4017f3eb5384SStefan Weinhuber return; 4018f3eb5384SStefan Weinhuber } 4019f3eb5384SStefan Weinhuber /* dump the sense data */ 4020773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 4021f3eb5384SStefan Weinhuber " I/O status report for device %s:\n", 4022f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev)); 4023773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4024a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 4025a5a0061fSStefan Weinhuber "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", 4026a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 4027a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 4028a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 4029a5a0061fSStefan Weinhuber irb->scsw.tm.fcxs, irb->scsw.tm.schxs, 4030a5a0061fSStefan Weinhuber req ? req->intrc : 0); 4031773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4032f3eb5384SStefan Weinhuber " device %s: Failing TCW: %p\n", 4033f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev), 4034f3eb5384SStefan Weinhuber (void *) (addr_t) irb->scsw.tm.tcw); 4035f3eb5384SStefan Weinhuber 4036f3eb5384SStefan Weinhuber tsb = NULL; 4037f3eb5384SStefan Weinhuber sense = NULL; 4038a5a0061fSStefan Weinhuber if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) 4039f3eb5384SStefan Weinhuber tsb = tcw_get_tsb( 4040f3eb5384SStefan Weinhuber (struct tcw *)(unsigned long)irb->scsw.tm.tcw); 4041f3eb5384SStefan Weinhuber 4042b8fde722SStefan Haberland if (tsb) { 4043773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4044f3eb5384SStefan Weinhuber " tsb->length %d\n", tsb->length); 4045773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4046f3eb5384SStefan Weinhuber " tsb->flags %x\n", tsb->flags); 4047773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4048f3eb5384SStefan Weinhuber " tsb->dcw_offset %d\n", tsb->dcw_offset); 4049773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4050f3eb5384SStefan Weinhuber " tsb->count %d\n", tsb->count); 4051f3eb5384SStefan Weinhuber residual = tsb->count - 28; 4052773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4053f3eb5384SStefan Weinhuber " residual %d\n", residual); 4054f3eb5384SStefan Weinhuber 4055f3eb5384SStefan Weinhuber switch (tsb->flags & 0x07) { 4056f3eb5384SStefan Weinhuber case 1: /* tsa_iostat */ 4057773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4058f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_time %d\n", 4059f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_time); 4060773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4061f3eb5384SStefan Weinhuber " tsb->tsa.iostat.def_time %d\n", 4062f3eb5384SStefan Weinhuber tsb->tsa.iostat.def_time); 4063773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4064f3eb5384SStefan Weinhuber " tsb->tsa.iostat.queue_time %d\n", 4065f3eb5384SStefan Weinhuber tsb->tsa.iostat.queue_time); 4066773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4067f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_busy_time %d\n", 4068f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_busy_time); 4069773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4070f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_act_time %d\n", 4071f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_act_time); 4072f3eb5384SStefan Weinhuber sense = tsb->tsa.iostat.sense; 4073f3eb5384SStefan Weinhuber break; 4074f3eb5384SStefan Weinhuber case 2: /* ts_ddpc */ 4075773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4076f3eb5384SStefan Weinhuber " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); 4077ef19298bSStefan Weinhuber for (sl = 0; sl < 2; sl++) { 4078773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4079ef19298bSStefan Weinhuber " tsb->tsa.ddpc.rcq %2d-%2d: ", 4080ef19298bSStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 4081ef19298bSStefan Weinhuber rcq = tsb->tsa.ddpc.rcq; 4082f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 4083f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 4084ef19298bSStefan Weinhuber rcq[8 * sl + sct]); 4085f3eb5384SStefan Weinhuber } 4086f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 4087f3eb5384SStefan Weinhuber } 4088f3eb5384SStefan Weinhuber sense = tsb->tsa.ddpc.sense; 4089f3eb5384SStefan Weinhuber break; 4090f3eb5384SStefan Weinhuber case 3: /* tsa_intrg */ 4091773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4092f3eb5384SStefan Weinhuber " tsb->tsa.intrg.: not supportet yet\n"); 4093f3eb5384SStefan Weinhuber break; 4094f3eb5384SStefan Weinhuber } 4095f3eb5384SStefan Weinhuber 4096f3eb5384SStefan Weinhuber if (sense) { 4097f3eb5384SStefan Weinhuber for (sl = 0; sl < 4; sl++) { 4098773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4099f3eb5384SStefan Weinhuber " Sense(hex) %2d-%2d:", 4100f3eb5384SStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 4101f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 4102f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 4103f3eb5384SStefan Weinhuber sense[8 * sl + sct]); 4104f3eb5384SStefan Weinhuber } 4105f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 4106f3eb5384SStefan Weinhuber } 4107f3eb5384SStefan Weinhuber 4108f3eb5384SStefan Weinhuber if (sense[27] & DASD_SENSE_BIT_0) { 4109f3eb5384SStefan Weinhuber /* 24 Byte Sense Data */ 4110773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4111f3eb5384SStefan Weinhuber " 24 Byte: %x MSG %x, " 4112f3eb5384SStefan Weinhuber "%s MSGb to SYSOP\n", 4113f3eb5384SStefan Weinhuber sense[7] >> 4, sense[7] & 0x0f, 4114f3eb5384SStefan Weinhuber sense[1] & 0x10 ? "" : "no"); 4115f3eb5384SStefan Weinhuber } else { 4116f3eb5384SStefan Weinhuber /* 32 Byte Sense Data */ 4117773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4118f3eb5384SStefan Weinhuber " 32 Byte: Format: %x " 4119f3eb5384SStefan Weinhuber "Exception class %x\n", 4120f3eb5384SStefan Weinhuber sense[6] & 0x0f, sense[22] >> 4); 4121f3eb5384SStefan Weinhuber } 4122f3eb5384SStefan Weinhuber } else { 4123773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4124f3eb5384SStefan Weinhuber " SORRY - NO VALID SENSE AVAILABLE\n"); 4125f3eb5384SStefan Weinhuber } 4126f3eb5384SStefan Weinhuber } else { 4127773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4128f3eb5384SStefan Weinhuber " SORRY - NO TSB DATA AVAILABLE\n"); 4129f3eb5384SStefan Weinhuber } 4130773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 4131f3eb5384SStefan Weinhuber free_page((unsigned long) page); 4132f3eb5384SStefan Weinhuber } 4133f3eb5384SStefan Weinhuber 4134f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense(struct dasd_device *device, 4135f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 4136f3eb5384SStefan Weinhuber { 4137a5a0061fSStefan Weinhuber if (scsw_is_tm(&irb->scsw)) 4138f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_tcw(device, req, irb); 4139f3eb5384SStefan Weinhuber else 4140f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_ccw(device, req, irb); 4141f3eb5384SStefan Weinhuber } 4142f3eb5384SStefan Weinhuber 4143501183f2SStefan Haberland static int dasd_eckd_pm_freeze(struct dasd_device *device) 4144d41dd122SStefan Haberland { 4145d41dd122SStefan Haberland /* 4146d41dd122SStefan Haberland * the device should be disconnected from our LCU structure 4147d41dd122SStefan Haberland * on restore we will reconnect it and reread LCU specific 4148d41dd122SStefan Haberland * information like PAV support that might have changed 4149d41dd122SStefan Haberland */ 4150d41dd122SStefan Haberland dasd_alias_remove_device(device); 4151d41dd122SStefan Haberland dasd_alias_disconnect_device_from_lcu(device); 4152d41dd122SStefan Haberland 4153d41dd122SStefan Haberland return 0; 4154d41dd122SStefan Haberland } 4155d41dd122SStefan Haberland 4156501183f2SStefan Haberland static int dasd_eckd_restore_device(struct dasd_device *device) 4157d41dd122SStefan Haberland { 4158d41dd122SStefan Haberland struct dasd_eckd_private *private; 41596fca97a9SStefan Haberland struct dasd_eckd_characteristics temp_rdc_data; 4160f9f8d02fSStefan Haberland int rc; 4161d41dd122SStefan Haberland struct dasd_uid temp_uid; 4162a7602f6cSStefan Haberland unsigned long flags; 4163ea4da6eaSStefan Haberland unsigned long cqr_flags = 0; 4164d41dd122SStefan Haberland 4165d41dd122SStefan Haberland private = (struct dasd_eckd_private *) device->private; 4166d41dd122SStefan Haberland 4167d41dd122SStefan Haberland /* Read Configuration Data */ 416855d3a85cSStefan Haberland dasd_eckd_read_conf(device); 4169d41dd122SStefan Haberland 41702dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 41712dedf0d9SStefan Haberland /* Generate device unique id */ 41722dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 41732dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4174d41dd122SStefan Haberland if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) 4175a7602f6cSStefan Haberland dev_err(&device->cdev->dev, "The UID of the DASD has " 4176a7602f6cSStefan Haberland "changed\n"); 41772dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4178d41dd122SStefan Haberland if (rc) 4179d41dd122SStefan Haberland goto out_err; 4180d41dd122SStefan Haberland 4181d41dd122SStefan Haberland /* register lcu with alias handling, enable PAV if this is a new lcu */ 4182f9f8d02fSStefan Haberland rc = dasd_alias_make_device_known_to_lcu(device); 4183f9f8d02fSStefan Haberland if (rc) 4184f9f8d02fSStefan Haberland return rc; 4185ea4da6eaSStefan Haberland 4186ea4da6eaSStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr_flags); 4187ea4da6eaSStefan Haberland dasd_eckd_validate_server(device, cqr_flags); 4188f4ac1d02SStefan Weinhuber 4189f4ac1d02SStefan Weinhuber /* RE-Read Configuration Data */ 419055d3a85cSStefan Haberland dasd_eckd_read_conf(device); 4191d41dd122SStefan Haberland 4192d41dd122SStefan Haberland /* Read Feature Codes */ 419368d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 4194d41dd122SStefan Haberland 4195d41dd122SStefan Haberland /* Read Device Characteristics */ 419668b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 41976fca97a9SStefan Haberland &temp_rdc_data, 64); 4198d41dd122SStefan Haberland if (rc) { 4199b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 4200b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 4201d41dd122SStefan Haberland goto out_err; 4202d41dd122SStefan Haberland } 4203a7602f6cSStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 42046fca97a9SStefan Haberland memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data)); 4205a7602f6cSStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4206d41dd122SStefan Haberland 4207d41dd122SStefan Haberland /* add device to alias management */ 4208d41dd122SStefan Haberland dasd_alias_add_device(device); 4209d41dd122SStefan Haberland 4210d41dd122SStefan Haberland return 0; 4211d41dd122SStefan Haberland 4212d41dd122SStefan Haberland out_err: 4213e6125fbaSStefan Haberland return -1; 4214d41dd122SStefan Haberland } 4215d41dd122SStefan Haberland 4216501183f2SStefan Haberland static int dasd_eckd_reload_device(struct dasd_device *device) 4217501183f2SStefan Haberland { 4218501183f2SStefan Haberland struct dasd_eckd_private *private; 4219501183f2SStefan Haberland int rc, old_base; 42202dedf0d9SStefan Haberland char print_uid[60]; 42212dedf0d9SStefan Haberland struct dasd_uid uid; 42222dedf0d9SStefan Haberland unsigned long flags; 4223501183f2SStefan Haberland 4224501183f2SStefan Haberland private = (struct dasd_eckd_private *) device->private; 42252dedf0d9SStefan Haberland 42262dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4227501183f2SStefan Haberland old_base = private->uid.base_unit_addr; 42282dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 42292dedf0d9SStefan Haberland 4230501183f2SStefan Haberland /* Read Configuration Data */ 4231501183f2SStefan Haberland rc = dasd_eckd_read_conf(device); 4232501183f2SStefan Haberland if (rc) 4233501183f2SStefan Haberland goto out_err; 4234501183f2SStefan Haberland 42352dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 4236501183f2SStefan Haberland if (rc) 4237501183f2SStefan Haberland goto out_err; 4238501183f2SStefan Haberland /* 4239501183f2SStefan Haberland * update unit address configuration and 4240501183f2SStefan Haberland * add device to alias management 4241501183f2SStefan Haberland */ 4242501183f2SStefan Haberland dasd_alias_update_add_device(device); 4243501183f2SStefan Haberland 42442dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &uid); 42452dedf0d9SStefan Haberland 42462dedf0d9SStefan Haberland if (old_base != uid.base_unit_addr) { 42472dedf0d9SStefan Haberland if (strlen(uid.vduit) > 0) 42482dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 42492dedf0d9SStefan Haberland "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial, 42502dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr, uid.vduit); 4251501183f2SStefan Haberland else 42522dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 42532dedf0d9SStefan Haberland "%s.%s.%04x.%02x", uid.vendor, uid.serial, 42542dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr); 4255501183f2SStefan Haberland 4256501183f2SStefan Haberland dev_info(&device->cdev->dev, 4257501183f2SStefan Haberland "An Alias device was reassigned to a new base device " 42582dedf0d9SStefan Haberland "with UID: %s\n", print_uid); 4259501183f2SStefan Haberland } 4260501183f2SStefan Haberland return 0; 4261501183f2SStefan Haberland 4262501183f2SStefan Haberland out_err: 4263501183f2SStefan Haberland return -1; 4264501183f2SStefan Haberland } 4265501183f2SStefan Haberland 4266d41dd122SStefan Haberland static struct ccw_driver dasd_eckd_driver = { 42673bda058bSSebastian Ott .driver = { 4268d41dd122SStefan Haberland .name = "dasd-eckd", 4269d41dd122SStefan Haberland .owner = THIS_MODULE, 42703bda058bSSebastian Ott }, 4271d41dd122SStefan Haberland .ids = dasd_eckd_ids, 4272d41dd122SStefan Haberland .probe = dasd_eckd_probe, 4273d41dd122SStefan Haberland .remove = dasd_generic_remove, 4274d41dd122SStefan Haberland .set_offline = dasd_generic_set_offline, 4275d41dd122SStefan Haberland .set_online = dasd_eckd_set_online, 4276d41dd122SStefan Haberland .notify = dasd_generic_notify, 4277a4d26c6aSStefan Weinhuber .path_event = dasd_generic_path_event, 42784679e893SStefan Haberland .shutdown = dasd_generic_shutdown, 4279d41dd122SStefan Haberland .freeze = dasd_generic_pm_freeze, 4280d41dd122SStefan Haberland .thaw = dasd_generic_restore_device, 4281d41dd122SStefan Haberland .restore = dasd_generic_restore_device, 4282a23ed009SStefan Haberland .uc_handler = dasd_generic_uc_handler, 4283420f42ecSHeiko Carstens .int_class = IRQIO_DAS, 4284d41dd122SStefan Haberland }; 4285f3eb5384SStefan Weinhuber 42861da177e4SLinus Torvalds /* 42871da177e4SLinus Torvalds * max_blocks is dependent on the amount of storage that is available 42881da177e4SLinus Torvalds * in the static io buffer for each device. Currently each device has 42891da177e4SLinus Torvalds * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has 42901da177e4SLinus Torvalds * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use 42911da177e4SLinus Torvalds * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In 42921da177e4SLinus Torvalds * addition we have one define extent ccw + 16 bytes of data and one 42931da177e4SLinus Torvalds * locate record ccw + 16 bytes of data. That makes: 42941da177e4SLinus Torvalds * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. 42951da177e4SLinus Torvalds * We want to fit two into the available memory so that we can immediately 42961da177e4SLinus Torvalds * start the next request if one finishes off. That makes 249.5 blocks 42971da177e4SLinus Torvalds * for one request. Give a little safety and the result is 240. 42981da177e4SLinus Torvalds */ 42991da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline = { 43001da177e4SLinus Torvalds .owner = THIS_MODULE, 43011da177e4SLinus Torvalds .name = "ECKD", 43021da177e4SLinus Torvalds .ebcname = "ECKD", 4303ef19298bSStefan Weinhuber .max_blocks = 190, 43041da177e4SLinus Torvalds .check_device = dasd_eckd_check_characteristics, 43058e09f215SStefan Weinhuber .uncheck_device = dasd_eckd_uncheck_device, 43061da177e4SLinus Torvalds .do_analysis = dasd_eckd_do_analysis, 4307a4d26c6aSStefan Weinhuber .verify_path = dasd_eckd_verify_path, 43088e09f215SStefan Weinhuber .ready_to_online = dasd_eckd_ready_to_online, 43098e09f215SStefan Weinhuber .online_to_ready = dasd_eckd_online_to_ready, 43101da177e4SLinus Torvalds .fill_geometry = dasd_eckd_fill_geometry, 43111da177e4SLinus Torvalds .start_IO = dasd_start_IO, 43121da177e4SLinus Torvalds .term_IO = dasd_term_IO, 43138e09f215SStefan Weinhuber .handle_terminated_request = dasd_eckd_handle_terminated_request, 43141da177e4SLinus Torvalds .format_device = dasd_eckd_format_device, 43151da177e4SLinus Torvalds .erp_action = dasd_eckd_erp_action, 43161da177e4SLinus Torvalds .erp_postaction = dasd_eckd_erp_postaction, 43175a27e60dSStefan Weinhuber .check_for_device_change = dasd_eckd_check_for_device_change, 43188e09f215SStefan Weinhuber .build_cp = dasd_eckd_build_alias_cp, 43198e09f215SStefan Weinhuber .free_cp = dasd_eckd_free_alias_cp, 43201da177e4SLinus Torvalds .dump_sense = dasd_eckd_dump_sense, 4321fc19f381SStefan Haberland .dump_sense_dbf = dasd_eckd_dump_sense_dbf, 43221da177e4SLinus Torvalds .fill_info = dasd_eckd_fill_info, 43231107ccfbSChristoph Hellwig .ioctl = dasd_eckd_ioctl, 4324d41dd122SStefan Haberland .freeze = dasd_eckd_pm_freeze, 4325d41dd122SStefan Haberland .restore = dasd_eckd_restore_device, 4326501183f2SStefan Haberland .reload = dasd_eckd_reload_device, 43272dedf0d9SStefan Haberland .get_uid = dasd_eckd_get_uid, 4328f1633031SStefan Haberland .kick_validate = dasd_eckd_kick_validate_server, 43291da177e4SLinus Torvalds }; 43301da177e4SLinus Torvalds 43311da177e4SLinus Torvalds static int __init 43321da177e4SLinus Torvalds dasd_eckd_init(void) 43331da177e4SLinus Torvalds { 4334736e6ea0SSebastian Ott int ret; 4335736e6ea0SSebastian Ott 43361da177e4SLinus Torvalds ASCEBC(dasd_eckd_discipline.ebcname, 4); 4337f932bceaSStefan Weinhuber dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), 4338f932bceaSStefan Weinhuber GFP_KERNEL | GFP_DMA); 4339f932bceaSStefan Weinhuber if (!dasd_reserve_req) 4340f932bceaSStefan Weinhuber return -ENOMEM; 4341a4d26c6aSStefan Weinhuber path_verification_worker = kmalloc(sizeof(*path_verification_worker), 4342a4d26c6aSStefan Weinhuber GFP_KERNEL | GFP_DMA); 4343a4d26c6aSStefan Weinhuber if (!path_verification_worker) { 4344a4d26c6aSStefan Weinhuber kfree(dasd_reserve_req); 4345a4d26c6aSStefan Weinhuber return -ENOMEM; 4346a4d26c6aSStefan Weinhuber } 4347736e6ea0SSebastian Ott ret = ccw_driver_register(&dasd_eckd_driver); 4348736e6ea0SSebastian Ott if (!ret) 4349736e6ea0SSebastian Ott wait_for_device_probe(); 4350a4d26c6aSStefan Weinhuber else { 4351a4d26c6aSStefan Weinhuber kfree(path_verification_worker); 4352f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 4353a4d26c6aSStefan Weinhuber } 4354736e6ea0SSebastian Ott return ret; 43551da177e4SLinus Torvalds } 43561da177e4SLinus Torvalds 43571da177e4SLinus Torvalds static void __exit 43581da177e4SLinus Torvalds dasd_eckd_cleanup(void) 43591da177e4SLinus Torvalds { 43601da177e4SLinus Torvalds ccw_driver_unregister(&dasd_eckd_driver); 4361a4d26c6aSStefan Weinhuber kfree(path_verification_worker); 4362f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 43631da177e4SLinus Torvalds } 43641da177e4SLinus Torvalds 43651da177e4SLinus Torvalds module_init(dasd_eckd_init); 43661da177e4SLinus Torvalds module_exit(dasd_eckd_cleanup); 4367