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> 325db8440cSStefan Haberland #include <asm/schid.h> 335db8440cSStefan Haberland #include <asm/chpid.h> 341da177e4SLinus Torvalds 351da177e4SLinus Torvalds #include "dasd_int.h" 361da177e4SLinus Torvalds #include "dasd_eckd.h" 371da177e4SLinus Torvalds 381da177e4SLinus Torvalds #ifdef PRINTK_HEADER 391da177e4SLinus Torvalds #undef PRINTK_HEADER 401da177e4SLinus Torvalds #endif /* PRINTK_HEADER */ 411da177e4SLinus Torvalds #define PRINTK_HEADER "dasd(eckd):" 421da177e4SLinus Torvalds 431da177e4SLinus Torvalds #define ECKD_C0(i) (i->home_bytes) 441da177e4SLinus Torvalds #define ECKD_F(i) (i->formula) 451da177e4SLinus Torvalds #define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\ 461da177e4SLinus Torvalds (i->factors.f_0x02.f1)) 471da177e4SLinus Torvalds #define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\ 481da177e4SLinus Torvalds (i->factors.f_0x02.f2)) 491da177e4SLinus Torvalds #define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\ 501da177e4SLinus Torvalds (i->factors.f_0x02.f3)) 511da177e4SLinus Torvalds #define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0) 521da177e4SLinus Torvalds #define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0) 531da177e4SLinus Torvalds #define ECKD_F6(i) (i->factor6) 541da177e4SLinus Torvalds #define ECKD_F7(i) (i->factor7) 551da177e4SLinus Torvalds #define ECKD_F8(i) (i->factor8) 561da177e4SLinus Torvalds 57e4dbb0f2SStefan Haberland /* 58e4dbb0f2SStefan Haberland * raw track access always map to 64k in memory 59e4dbb0f2SStefan Haberland * so it maps to 16 blocks of 4k per track 60e4dbb0f2SStefan Haberland */ 61e4dbb0f2SStefan Haberland #define DASD_RAW_BLOCK_PER_TRACK 16 62e4dbb0f2SStefan Haberland #define DASD_RAW_BLOCKSIZE 4096 63e4dbb0f2SStefan Haberland /* 64k are 128 x 512 byte sectors */ 64e4dbb0f2SStefan Haberland #define DASD_RAW_SECTORS_PER_TRACK 128 65e4dbb0f2SStefan Haberland 661da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 671da177e4SLinus Torvalds 681da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline; 691da177e4SLinus Torvalds 701da177e4SLinus Torvalds /* The ccw bus type uses this table to find devices that it sends to 711da177e4SLinus Torvalds * dasd_eckd_probe */ 721da177e4SLinus Torvalds static struct ccw_device_id dasd_eckd_ids[] = { 73d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1}, 74d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2}, 755da24b76SStefan Haberland { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3380, 0), .driver_info = 0x3}, 76d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4}, 77d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5}, 78d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6}, 79d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7}, 80d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8}, 81d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9}, 82d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa}, 831da177e4SLinus Torvalds { /* end of list */ }, 841da177e4SLinus Torvalds }; 851da177e4SLinus Torvalds 861da177e4SLinus Torvalds MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids); 871da177e4SLinus Torvalds 881da177e4SLinus Torvalds static struct ccw_driver dasd_eckd_driver; /* see below */ 891da177e4SLinus Torvalds 90558b9ef0SStefan Weinhuber static void *rawpadpage; 91558b9ef0SStefan Weinhuber 92eb6e199bSStefan Weinhuber #define INIT_CQR_OK 0 93eb6e199bSStefan Weinhuber #define INIT_CQR_UNFORMATTED 1 94eb6e199bSStefan Weinhuber #define INIT_CQR_ERROR 2 95eb6e199bSStefan Weinhuber 96f932bceaSStefan Weinhuber /* emergency request for reserve/release */ 97f932bceaSStefan Weinhuber static struct { 98f932bceaSStefan Weinhuber struct dasd_ccw_req cqr; 99f932bceaSStefan Weinhuber struct ccw1 ccw; 100f932bceaSStefan Weinhuber char data[32]; 101f932bceaSStefan Weinhuber } *dasd_reserve_req; 102f932bceaSStefan Weinhuber static DEFINE_MUTEX(dasd_reserve_mutex); 103f932bceaSStefan Weinhuber 104a4d26c6aSStefan Weinhuber /* definitions for the path verification worker */ 105a4d26c6aSStefan Weinhuber struct path_verification_work_data { 106a4d26c6aSStefan Weinhuber struct work_struct worker; 107a4d26c6aSStefan Weinhuber struct dasd_device *device; 108a4d26c6aSStefan Weinhuber struct dasd_ccw_req cqr; 109a4d26c6aSStefan Weinhuber struct ccw1 ccw; 110a4d26c6aSStefan Weinhuber __u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE]; 111a4d26c6aSStefan Weinhuber int isglobal; 112a4d26c6aSStefan Weinhuber __u8 tbvpm; 113a4d26c6aSStefan Weinhuber }; 114a4d26c6aSStefan Weinhuber static struct path_verification_work_data *path_verification_worker; 115a4d26c6aSStefan Weinhuber static DEFINE_MUTEX(dasd_path_verification_mutex); 116eb6e199bSStefan Weinhuber 1175db8440cSStefan Haberland struct check_attention_work_data { 1185db8440cSStefan Haberland struct work_struct worker; 1195db8440cSStefan Haberland struct dasd_device *device; 1205db8440cSStefan Haberland __u8 lpum; 1215db8440cSStefan Haberland }; 1225db8440cSStefan Haberland 1231da177e4SLinus Torvalds /* initial attempt at a probe function. this can be simplified once 1241da177e4SLinus Torvalds * the other detection code is gone */ 1251da177e4SLinus Torvalds static int 1261da177e4SLinus Torvalds dasd_eckd_probe (struct ccw_device *cdev) 1271da177e4SLinus Torvalds { 1281da177e4SLinus Torvalds int ret; 1291da177e4SLinus Torvalds 13040545573SHorst Hummel /* set ECKD specific ccw-device options */ 131454e1fa1SPeter Oberparleiter ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE | 132454e1fa1SPeter Oberparleiter CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH); 13340545573SHorst Hummel if (ret) { 134b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s", 135b8ed5dd5SStefan Haberland "dasd_eckd_probe: could not set " 136b8ed5dd5SStefan Haberland "ccw-device options"); 1371da177e4SLinus Torvalds return ret; 13840545573SHorst Hummel } 13940545573SHorst Hummel ret = dasd_generic_probe(cdev, &dasd_eckd_discipline); 14040545573SHorst Hummel return ret; 1411da177e4SLinus Torvalds } 1421da177e4SLinus Torvalds 1431da177e4SLinus Torvalds static int 1441da177e4SLinus Torvalds dasd_eckd_set_online(struct ccw_device *cdev) 1451da177e4SLinus Torvalds { 1461da177e4SLinus Torvalds return dasd_generic_set_online(cdev, &dasd_eckd_discipline); 1471da177e4SLinus Torvalds } 1481da177e4SLinus Torvalds 1491da177e4SLinus Torvalds static const int sizes_trk0[] = { 28, 148, 84 }; 1501da177e4SLinus Torvalds #define LABEL_SIZE 140 1511da177e4SLinus Torvalds 1523bc9fef9SStefan Haberland /* head and record addresses of count_area read in analysis ccw */ 1533bc9fef9SStefan Haberland static const int count_area_head[] = { 0, 0, 0, 0, 2 }; 1543bc9fef9SStefan Haberland static const int count_area_rec[] = { 1, 2, 3, 4, 1 }; 1553bc9fef9SStefan Haberland 1561da177e4SLinus Torvalds static inline unsigned int 1571da177e4SLinus Torvalds round_up_multiple(unsigned int no, unsigned int mult) 1581da177e4SLinus Torvalds { 1591da177e4SLinus Torvalds int rem = no % mult; 1601da177e4SLinus Torvalds return (rem ? no - rem + mult : no); 1611da177e4SLinus Torvalds } 1621da177e4SLinus Torvalds 1631da177e4SLinus Torvalds static inline unsigned int 1641da177e4SLinus Torvalds ceil_quot(unsigned int d1, unsigned int d2) 1651da177e4SLinus Torvalds { 1661da177e4SLinus Torvalds return (d1 + (d2 - 1)) / d2; 1671da177e4SLinus Torvalds } 1681da177e4SLinus Torvalds 1694d284cacSHeiko Carstens static unsigned int 1701da177e4SLinus Torvalds recs_per_track(struct dasd_eckd_characteristics * rdc, 1711da177e4SLinus Torvalds unsigned int kl, unsigned int dl) 1721da177e4SLinus Torvalds { 1731da177e4SLinus Torvalds int dn, kn; 1741da177e4SLinus Torvalds 1751da177e4SLinus Torvalds switch (rdc->dev_type) { 1761da177e4SLinus Torvalds case 0x3380: 1771da177e4SLinus Torvalds if (kl) 1781da177e4SLinus Torvalds return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + 1791da177e4SLinus Torvalds ceil_quot(dl + 12, 32)); 1801da177e4SLinus Torvalds else 1811da177e4SLinus Torvalds return 1499 / (15 + ceil_quot(dl + 12, 32)); 1821da177e4SLinus Torvalds case 0x3390: 1831da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1841da177e4SLinus Torvalds if (kl) { 1851da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1861da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + 1871da177e4SLinus Torvalds 9 + ceil_quot(dl + 6 * dn, 34)); 1881da177e4SLinus Torvalds } else 1891da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); 1901da177e4SLinus Torvalds case 0x9345: 1911da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1921da177e4SLinus Torvalds if (kl) { 1931da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1941da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + 1951da177e4SLinus Torvalds ceil_quot(dl + 6 * dn, 34)); 1961da177e4SLinus Torvalds } else 1971da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); 1981da177e4SLinus Torvalds } 1991da177e4SLinus Torvalds return 0; 2001da177e4SLinus Torvalds } 2011da177e4SLinus Torvalds 202b44b0ab3SStefan Weinhuber static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head) 203b44b0ab3SStefan Weinhuber { 204b44b0ab3SStefan Weinhuber geo->cyl = (__u16) cyl; 205b44b0ab3SStefan Weinhuber geo->head = cyl >> 16; 206b44b0ab3SStefan Weinhuber geo->head <<= 4; 207b44b0ab3SStefan Weinhuber geo->head |= head; 208b44b0ab3SStefan Weinhuber } 209b44b0ab3SStefan Weinhuber 2104d284cacSHeiko Carstens static int 2111da177e4SLinus Torvalds check_XRC (struct ccw1 *de_ccw, 2121da177e4SLinus Torvalds struct DE_eckd_data *data, 2131da177e4SLinus Torvalds struct dasd_device *device) 2141da177e4SLinus Torvalds { 2151da177e4SLinus Torvalds struct dasd_eckd_private *private; 216d54853efSMartin Schwidefsky int rc; 2171da177e4SLinus Torvalds 2181da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 219d54853efSMartin Schwidefsky if (!private->rdc_data.facilities.XRC_supported) 220d54853efSMartin Schwidefsky return 0; 2211da177e4SLinus Torvalds 2221da177e4SLinus Torvalds /* switch on System Time Stamp - needed for XRC Support */ 2231da177e4SLinus Torvalds data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ 2241da177e4SLinus Torvalds data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ 2251da177e4SLinus Torvalds 226d54853efSMartin Schwidefsky rc = get_sync_clock(&data->ep_sys_time); 227d54853efSMartin Schwidefsky /* Ignore return code if sync clock is switched off. */ 228a8f6db4dSHeiko Carstens if (rc == -EOPNOTSUPP || rc == -EACCES) 229d54853efSMartin Schwidefsky rc = 0; 2301da177e4SLinus Torvalds 2311da177e4SLinus Torvalds de_ccw->count = sizeof(struct DE_eckd_data); 2321da177e4SLinus Torvalds de_ccw->flags |= CCW_FLAG_SLI; 233d54853efSMartin Schwidefsky return rc; 2341da177e4SLinus Torvalds } 2351da177e4SLinus Torvalds 2364d284cacSHeiko Carstens static int 237b44b0ab3SStefan Weinhuber define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk, 238b44b0ab3SStefan Weinhuber unsigned int totrk, int cmd, struct dasd_device *device) 2391da177e4SLinus Torvalds { 2401da177e4SLinus Torvalds struct dasd_eckd_private *private; 241b44b0ab3SStefan Weinhuber u32 begcyl, endcyl; 242b44b0ab3SStefan Weinhuber u16 heads, beghead, endhead; 243d54853efSMartin Schwidefsky int rc = 0; 2441da177e4SLinus Torvalds 2451da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 2461da177e4SLinus Torvalds 2471da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; 2481da177e4SLinus Torvalds ccw->flags = 0; 2491da177e4SLinus Torvalds ccw->count = 16; 2501da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 2511da177e4SLinus Torvalds 2521da177e4SLinus Torvalds memset(data, 0, sizeof(struct DE_eckd_data)); 2531da177e4SLinus Torvalds switch (cmd) { 2541da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 2551da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 2561da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 2571da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 2581da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 2591da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 2601da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 2611da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 2621da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_COUNT: 2631da177e4SLinus Torvalds data->mask.perm = 0x1; 2641da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 2651da177e4SLinus Torvalds break; 2661da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 2671da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 2681da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 2691da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 2701da177e4SLinus Torvalds data->mask.perm = 0x02; 2711da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 272d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2731da177e4SLinus Torvalds break; 2741da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 2751da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 2761da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 277d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2781da177e4SLinus Torvalds break; 2791da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 2801da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 2811da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 2821da177e4SLinus Torvalds data->mask.perm = 0x3; 2831da177e4SLinus Torvalds data->mask.auth = 0x1; 2841da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 285d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2861da177e4SLinus Torvalds break; 2871da177e4SLinus Torvalds default: 288fc19f381SStefan Haberland dev_err(&device->cdev->dev, 289fc19f381SStefan Haberland "0x%x is not a known command\n", cmd); 2901da177e4SLinus Torvalds break; 2911da177e4SLinus Torvalds } 2921da177e4SLinus Torvalds 2931da177e4SLinus Torvalds data->attributes.mode = 0x3; /* ECKD */ 2941da177e4SLinus Torvalds 2951da177e4SLinus Torvalds if ((private->rdc_data.cu_type == 0x2105 || 2961da177e4SLinus Torvalds private->rdc_data.cu_type == 0x2107 || 2971da177e4SLinus Torvalds private->rdc_data.cu_type == 0x1750) 2981da177e4SLinus Torvalds && !(private->uses_cdl && trk < 2)) 2991da177e4SLinus Torvalds data->ga_extended |= 0x40; /* Regular Data Format Mode */ 3001da177e4SLinus Torvalds 301b44b0ab3SStefan Weinhuber heads = private->rdc_data.trk_per_cyl; 302b44b0ab3SStefan Weinhuber begcyl = trk / heads; 303b44b0ab3SStefan Weinhuber beghead = trk % heads; 304b44b0ab3SStefan Weinhuber endcyl = totrk / heads; 305b44b0ab3SStefan Weinhuber endhead = totrk % heads; 3061da177e4SLinus Torvalds 3071da177e4SLinus Torvalds /* check for sequential prestage - enhance cylinder range */ 3081da177e4SLinus Torvalds if (data->attributes.operation == DASD_SEQ_PRESTAGE || 3091da177e4SLinus Torvalds data->attributes.operation == DASD_SEQ_ACCESS) { 3101da177e4SLinus Torvalds 311b44b0ab3SStefan Weinhuber if (endcyl + private->attrib.nr_cyl < private->real_cyl) 312b44b0ab3SStefan Weinhuber endcyl += private->attrib.nr_cyl; 3131da177e4SLinus Torvalds else 314b44b0ab3SStefan Weinhuber endcyl = (private->real_cyl - 1); 3151da177e4SLinus Torvalds } 3161da177e4SLinus Torvalds 317b44b0ab3SStefan Weinhuber set_ch_t(&data->beg_ext, begcyl, beghead); 318b44b0ab3SStefan Weinhuber set_ch_t(&data->end_ext, endcyl, endhead); 319d54853efSMartin Schwidefsky return rc; 3201da177e4SLinus Torvalds } 3211da177e4SLinus Torvalds 3228e09f215SStefan Weinhuber static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata, 3238e09f215SStefan Weinhuber struct dasd_device *device) 3248e09f215SStefan Weinhuber { 3258e09f215SStefan Weinhuber struct dasd_eckd_private *private; 3268e09f215SStefan Weinhuber int rc; 3278e09f215SStefan Weinhuber 3288e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 3298e09f215SStefan Weinhuber if (!private->rdc_data.facilities.XRC_supported) 3308e09f215SStefan Weinhuber return 0; 3318e09f215SStefan Weinhuber 3328e09f215SStefan Weinhuber /* switch on System Time Stamp - needed for XRC Support */ 333f3eb5384SStefan Weinhuber pfxdata->define_extent.ga_extended |= 0x08; /* 'Time Stamp Valid' */ 334f3eb5384SStefan Weinhuber pfxdata->define_extent.ga_extended |= 0x02; /* 'Extended Parameter' */ 3358e09f215SStefan Weinhuber pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */ 3368e09f215SStefan Weinhuber 337f3eb5384SStefan Weinhuber rc = get_sync_clock(&pfxdata->define_extent.ep_sys_time); 3388e09f215SStefan Weinhuber /* Ignore return code if sync clock is switched off. */ 339a8f6db4dSHeiko Carstens if (rc == -EOPNOTSUPP || rc == -EACCES) 3408e09f215SStefan Weinhuber rc = 0; 3418e09f215SStefan Weinhuber return rc; 3428e09f215SStefan Weinhuber } 3438e09f215SStefan Weinhuber 344f3eb5384SStefan Weinhuber static void fill_LRE_data(struct LRE_eckd_data *data, unsigned int trk, 345f3eb5384SStefan Weinhuber unsigned int rec_on_trk, int count, int cmd, 346f3eb5384SStefan Weinhuber struct dasd_device *device, unsigned int reclen, 347f3eb5384SStefan Weinhuber unsigned int tlf) 348f3eb5384SStefan Weinhuber { 349f3eb5384SStefan Weinhuber struct dasd_eckd_private *private; 350f3eb5384SStefan Weinhuber int sector; 351f3eb5384SStefan Weinhuber int dn, d; 352f3eb5384SStefan Weinhuber 353f3eb5384SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 354f3eb5384SStefan Weinhuber 355f3eb5384SStefan Weinhuber memset(data, 0, sizeof(*data)); 356f3eb5384SStefan Weinhuber sector = 0; 357f3eb5384SStefan Weinhuber if (rec_on_trk) { 358f3eb5384SStefan Weinhuber switch (private->rdc_data.dev_type) { 359f3eb5384SStefan Weinhuber case 0x3390: 360f3eb5384SStefan Weinhuber dn = ceil_quot(reclen + 6, 232); 361f3eb5384SStefan Weinhuber d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 362f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 363f3eb5384SStefan Weinhuber break; 364f3eb5384SStefan Weinhuber case 0x3380: 365f3eb5384SStefan Weinhuber d = 7 + ceil_quot(reclen + 12, 32); 366f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 367f3eb5384SStefan Weinhuber break; 368f3eb5384SStefan Weinhuber } 369f3eb5384SStefan Weinhuber } 370f3eb5384SStefan Weinhuber data->sector = sector; 371f3eb5384SStefan Weinhuber /* note: meaning of count depends on the operation 372f3eb5384SStefan Weinhuber * for record based I/O it's the number of records, but for 373f3eb5384SStefan Weinhuber * track based I/O it's the number of tracks 374f3eb5384SStefan Weinhuber */ 375f3eb5384SStefan Weinhuber data->count = count; 376f3eb5384SStefan Weinhuber switch (cmd) { 377f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 378f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 379f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 380f3eb5384SStefan Weinhuber break; 381f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_HOME_ADDRESS: 382f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 383f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 384f3eb5384SStefan Weinhuber break; 385f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 386f3eb5384SStefan Weinhuber data->operation.orientation = 0x1; 387f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 388f3eb5384SStefan Weinhuber data->count++; 389f3eb5384SStefan Weinhuber break; 390f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_RECORD_ZERO: 391f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 392f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 393f3eb5384SStefan Weinhuber data->count++; 394f3eb5384SStefan Weinhuber break; 395f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE: 396f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_MT: 397f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD: 398f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD_MT: 399f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 400f3eb5384SStefan Weinhuber data->length = reclen; 401f3eb5384SStefan Weinhuber data->operation.operation = 0x01; 402f3eb5384SStefan Weinhuber break; 403f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD: 404f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD_MT: 405f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 406f3eb5384SStefan Weinhuber data->length = reclen; 407f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 408f3eb5384SStefan Weinhuber break; 409e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_WRITE_FULL_TRACK: 410e4dbb0f2SStefan Haberland data->operation.orientation = 0x0; 411e4dbb0f2SStefan Haberland data->operation.operation = 0x3F; 412e4dbb0f2SStefan Haberland data->extended_operation = 0x11; 413e4dbb0f2SStefan Haberland data->length = 0; 414e4dbb0f2SStefan Haberland data->extended_parameter_length = 0x02; 415e4dbb0f2SStefan Haberland if (data->count > 8) { 416e4dbb0f2SStefan Haberland data->extended_parameter[0] = 0xFF; 417e4dbb0f2SStefan Haberland data->extended_parameter[1] = 0xFF; 418e4dbb0f2SStefan Haberland data->extended_parameter[1] <<= (16 - count); 419e4dbb0f2SStefan Haberland } else { 420e4dbb0f2SStefan Haberland data->extended_parameter[0] = 0xFF; 421e4dbb0f2SStefan Haberland data->extended_parameter[0] <<= (8 - count); 422e4dbb0f2SStefan Haberland data->extended_parameter[1] = 0x00; 423e4dbb0f2SStefan Haberland } 424e4dbb0f2SStefan Haberland data->sector = 0xFF; 425e4dbb0f2SStefan Haberland break; 426f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 427f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 428f3eb5384SStefan Weinhuber data->length = reclen; /* not tlf, as one might think */ 429f3eb5384SStefan Weinhuber data->operation.operation = 0x3F; 430f3eb5384SStefan Weinhuber data->extended_operation = 0x23; 431f3eb5384SStefan Weinhuber break; 432f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ: 433f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_MT: 434f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_KD: 435f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_KD_MT: 436f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 437f3eb5384SStefan Weinhuber data->length = reclen; 438f3eb5384SStefan Weinhuber data->operation.operation = 0x06; 439f3eb5384SStefan Weinhuber break; 440f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD: 441f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD_MT: 442f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 443f3eb5384SStefan Weinhuber data->length = reclen; 444f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 445f3eb5384SStefan Weinhuber break; 446f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_COUNT: 447f3eb5384SStefan Weinhuber data->operation.operation = 0x06; 448f3eb5384SStefan Weinhuber break; 449e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_READ_TRACK: 450e4dbb0f2SStefan Haberland data->operation.orientation = 0x1; 451e4dbb0f2SStefan Haberland data->operation.operation = 0x0C; 452e4dbb0f2SStefan Haberland data->extended_parameter_length = 0; 453e4dbb0f2SStefan Haberland data->sector = 0xFF; 454e4dbb0f2SStefan Haberland break; 455f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 456f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 457f3eb5384SStefan Weinhuber data->length = tlf; 458f3eb5384SStefan Weinhuber data->operation.operation = 0x0C; 459f3eb5384SStefan Weinhuber break; 460f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_ERASE: 461f3eb5384SStefan Weinhuber data->length = reclen; 462f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 463f3eb5384SStefan Weinhuber data->operation.operation = 0x0b; 464f3eb5384SStefan Weinhuber break; 465f3eb5384SStefan Weinhuber default: 466f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, device, 467f3eb5384SStefan Weinhuber "fill LRE unknown opcode 0x%x", cmd); 468f3eb5384SStefan Weinhuber BUG(); 469f3eb5384SStefan Weinhuber } 470f3eb5384SStefan Weinhuber set_ch_t(&data->seek_addr, 471f3eb5384SStefan Weinhuber trk / private->rdc_data.trk_per_cyl, 472f3eb5384SStefan Weinhuber trk % private->rdc_data.trk_per_cyl); 473f3eb5384SStefan Weinhuber data->search_arg.cyl = data->seek_addr.cyl; 474f3eb5384SStefan Weinhuber data->search_arg.head = data->seek_addr.head; 475f3eb5384SStefan Weinhuber data->search_arg.record = rec_on_trk; 476f3eb5384SStefan Weinhuber } 477f3eb5384SStefan Weinhuber 478f3eb5384SStefan Weinhuber static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 479b44b0ab3SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 480f3eb5384SStefan Weinhuber struct dasd_device *basedev, struct dasd_device *startdev, 481f3eb5384SStefan Weinhuber unsigned char format, unsigned int rec_on_trk, int count, 482f3eb5384SStefan Weinhuber unsigned int blksize, unsigned int tlf) 4838e09f215SStefan Weinhuber { 4848e09f215SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 485f3eb5384SStefan Weinhuber struct DE_eckd_data *dedata; 486f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 487b44b0ab3SStefan Weinhuber u32 begcyl, endcyl; 488b44b0ab3SStefan Weinhuber u16 heads, beghead, endhead; 4898e09f215SStefan Weinhuber int rc = 0; 4908e09f215SStefan Weinhuber 4918e09f215SStefan Weinhuber basepriv = (struct dasd_eckd_private *) basedev->private; 4928e09f215SStefan Weinhuber startpriv = (struct dasd_eckd_private *) startdev->private; 493f3eb5384SStefan Weinhuber dedata = &pfxdata->define_extent; 494f3eb5384SStefan Weinhuber lredata = &pfxdata->locate_record; 4958e09f215SStefan Weinhuber 4968e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PFX; 4978e09f215SStefan Weinhuber ccw->flags = 0; 498e4dbb0f2SStefan Haberland if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) { 499e4dbb0f2SStefan Haberland ccw->count = sizeof(*pfxdata) + 2; 500e4dbb0f2SStefan Haberland ccw->cda = (__u32) __pa(pfxdata); 501e4dbb0f2SStefan Haberland memset(pfxdata, 0, sizeof(*pfxdata) + 2); 502e4dbb0f2SStefan Haberland } else { 5038e09f215SStefan Weinhuber ccw->count = sizeof(*pfxdata); 5048e09f215SStefan Weinhuber ccw->cda = (__u32) __pa(pfxdata); 5058e09f215SStefan Weinhuber memset(pfxdata, 0, sizeof(*pfxdata)); 506e4dbb0f2SStefan Haberland } 507e4dbb0f2SStefan Haberland 5088e09f215SStefan Weinhuber /* prefix data */ 509f3eb5384SStefan Weinhuber if (format > 1) { 510f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 511f3eb5384SStefan Weinhuber "PFX LRE unknown format 0x%x", format); 512f3eb5384SStefan Weinhuber BUG(); 513f3eb5384SStefan Weinhuber return -EINVAL; 514f3eb5384SStefan Weinhuber } 515f3eb5384SStefan Weinhuber pfxdata->format = format; 5164abb08c2SStefan Weinhuber pfxdata->base_address = basepriv->ned->unit_addr; 5174abb08c2SStefan Weinhuber pfxdata->base_lss = basepriv->ned->ID; 518f3eb5384SStefan Weinhuber pfxdata->validity.define_extent = 1; 5198e09f215SStefan Weinhuber 5208e09f215SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 5218e09f215SStefan Weinhuber if (startpriv->uid.type != UA_BASE_DEVICE) { 5228e09f215SStefan Weinhuber pfxdata->validity.verify_base = 1; 5238e09f215SStefan Weinhuber if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 5248e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 1; 5258e09f215SStefan Weinhuber } 5268e09f215SStefan Weinhuber 5278e09f215SStefan Weinhuber /* define extend data (mostly)*/ 5288e09f215SStefan Weinhuber switch (cmd) { 5298e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_HOME_ADDRESS: 5308e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_RECORD_ZERO: 5318e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ: 5328e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_MT: 5338e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD: 5348e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD_MT: 5358e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_KD: 5368e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_KD_MT: 5378e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_COUNT: 538f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 539f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 540f3eb5384SStefan Weinhuber break; 541e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_READ_TRACK: 542f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 543f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 544f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 545f3eb5384SStefan Weinhuber dedata->blk_size = 0; 5468e09f215SStefan Weinhuber break; 5478e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE: 5488e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_MT: 5498e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD: 5508e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD_MT: 551f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 552f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 5538e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 5548e09f215SStefan Weinhuber break; 5558e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD: 5568e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD_MT: 557f3eb5384SStefan Weinhuber dedata->attributes.operation = DASD_BYPASS_CACHE; 5588e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 5598e09f215SStefan Weinhuber break; 5608e09f215SStefan Weinhuber case DASD_ECKD_CCW_ERASE: 5618e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 5628e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 563f3eb5384SStefan Weinhuber dedata->mask.perm = 0x3; 564f3eb5384SStefan Weinhuber dedata->mask.auth = 0x1; 565f3eb5384SStefan Weinhuber dedata->attributes.operation = DASD_BYPASS_CACHE; 566f3eb5384SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 567f3eb5384SStefan Weinhuber break; 568e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_WRITE_FULL_TRACK: 569e4dbb0f2SStefan Haberland dedata->mask.perm = 0x03; 570e4dbb0f2SStefan Haberland dedata->attributes.operation = basepriv->attrib.operation; 571e4dbb0f2SStefan Haberland dedata->blk_size = 0; 572e4dbb0f2SStefan Haberland break; 573f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 574f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 575f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 576f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 5778e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 5788e09f215SStefan Weinhuber break; 5798e09f215SStefan Weinhuber default: 580f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 581f3eb5384SStefan Weinhuber "PFX LRE unknown opcode 0x%x", cmd); 582f3eb5384SStefan Weinhuber BUG(); 583f3eb5384SStefan Weinhuber return -EINVAL; 5848e09f215SStefan Weinhuber } 5858e09f215SStefan Weinhuber 586f3eb5384SStefan Weinhuber dedata->attributes.mode = 0x3; /* ECKD */ 5878e09f215SStefan Weinhuber 5888e09f215SStefan Weinhuber if ((basepriv->rdc_data.cu_type == 0x2105 || 5898e09f215SStefan Weinhuber basepriv->rdc_data.cu_type == 0x2107 || 5908e09f215SStefan Weinhuber basepriv->rdc_data.cu_type == 0x1750) 5918e09f215SStefan Weinhuber && !(basepriv->uses_cdl && trk < 2)) 592f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x40; /* Regular Data Format Mode */ 5938e09f215SStefan Weinhuber 594b44b0ab3SStefan Weinhuber heads = basepriv->rdc_data.trk_per_cyl; 595b44b0ab3SStefan Weinhuber begcyl = trk / heads; 596b44b0ab3SStefan Weinhuber beghead = trk % heads; 597b44b0ab3SStefan Weinhuber endcyl = totrk / heads; 598b44b0ab3SStefan Weinhuber endhead = totrk % heads; 5998e09f215SStefan Weinhuber 6008e09f215SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 601f3eb5384SStefan Weinhuber if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 602f3eb5384SStefan Weinhuber dedata->attributes.operation == DASD_SEQ_ACCESS) { 6038e09f215SStefan Weinhuber 604b44b0ab3SStefan Weinhuber if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 605b44b0ab3SStefan Weinhuber endcyl += basepriv->attrib.nr_cyl; 6068e09f215SStefan Weinhuber else 607b44b0ab3SStefan Weinhuber endcyl = (basepriv->real_cyl - 1); 6088e09f215SStefan Weinhuber } 6098e09f215SStefan Weinhuber 610f3eb5384SStefan Weinhuber set_ch_t(&dedata->beg_ext, begcyl, beghead); 611f3eb5384SStefan Weinhuber set_ch_t(&dedata->end_ext, endcyl, endhead); 612f3eb5384SStefan Weinhuber 613f3eb5384SStefan Weinhuber if (format == 1) { 614f3eb5384SStefan Weinhuber fill_LRE_data(lredata, trk, rec_on_trk, count, cmd, 615f3eb5384SStefan Weinhuber basedev, blksize, tlf); 616f3eb5384SStefan Weinhuber } 617f3eb5384SStefan Weinhuber 6188e09f215SStefan Weinhuber return rc; 6198e09f215SStefan Weinhuber } 6208e09f215SStefan Weinhuber 621f3eb5384SStefan Weinhuber static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 622f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 623f3eb5384SStefan Weinhuber struct dasd_device *basedev, struct dasd_device *startdev) 624f3eb5384SStefan Weinhuber { 625f3eb5384SStefan Weinhuber return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev, 626f3eb5384SStefan Weinhuber 0, 0, 0, 0, 0); 627f3eb5384SStefan Weinhuber } 628f3eb5384SStefan Weinhuber 6294d284cacSHeiko Carstens static void 630b44b0ab3SStefan Weinhuber locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk, 631b44b0ab3SStefan Weinhuber unsigned int rec_on_trk, int no_rec, int cmd, 6321da177e4SLinus Torvalds struct dasd_device * device, int reclen) 6331da177e4SLinus Torvalds { 6341da177e4SLinus Torvalds struct dasd_eckd_private *private; 6351da177e4SLinus Torvalds int sector; 6361da177e4SLinus Torvalds int dn, d; 6371da177e4SLinus Torvalds 6381da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 6391da177e4SLinus Torvalds 6401da177e4SLinus Torvalds DBF_DEV_EVENT(DBF_INFO, device, 6411da177e4SLinus Torvalds "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", 6421da177e4SLinus Torvalds trk, rec_on_trk, no_rec, cmd, reclen); 6431da177e4SLinus Torvalds 6441da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; 6451da177e4SLinus Torvalds ccw->flags = 0; 6461da177e4SLinus Torvalds ccw->count = 16; 6471da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 6481da177e4SLinus Torvalds 6491da177e4SLinus Torvalds memset(data, 0, sizeof(struct LO_eckd_data)); 6501da177e4SLinus Torvalds sector = 0; 6511da177e4SLinus Torvalds if (rec_on_trk) { 6521da177e4SLinus Torvalds switch (private->rdc_data.dev_type) { 6531da177e4SLinus Torvalds case 0x3390: 6541da177e4SLinus Torvalds dn = ceil_quot(reclen + 6, 232); 6551da177e4SLinus Torvalds d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 6561da177e4SLinus Torvalds sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 6571da177e4SLinus Torvalds break; 6581da177e4SLinus Torvalds case 0x3380: 6591da177e4SLinus Torvalds d = 7 + ceil_quot(reclen + 12, 32); 6601da177e4SLinus Torvalds sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 6611da177e4SLinus Torvalds break; 6621da177e4SLinus Torvalds } 6631da177e4SLinus Torvalds } 6641da177e4SLinus Torvalds data->sector = sector; 6651da177e4SLinus Torvalds data->count = no_rec; 6661da177e4SLinus Torvalds switch (cmd) { 6671da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 6681da177e4SLinus Torvalds data->operation.orientation = 0x3; 6691da177e4SLinus Torvalds data->operation.operation = 0x03; 6701da177e4SLinus Torvalds break; 6711da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 6721da177e4SLinus Torvalds data->operation.orientation = 0x3; 6731da177e4SLinus Torvalds data->operation.operation = 0x16; 6741da177e4SLinus Torvalds break; 6751da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 6761da177e4SLinus Torvalds data->operation.orientation = 0x1; 6771da177e4SLinus Torvalds data->operation.operation = 0x03; 6781da177e4SLinus Torvalds data->count++; 6791da177e4SLinus Torvalds break; 6801da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 6811da177e4SLinus Torvalds data->operation.orientation = 0x3; 6821da177e4SLinus Torvalds data->operation.operation = 0x16; 6831da177e4SLinus Torvalds data->count++; 6841da177e4SLinus Torvalds break; 6851da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 6861da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 6871da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 6881da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 6891da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6901da177e4SLinus Torvalds data->length = reclen; 6911da177e4SLinus Torvalds data->operation.operation = 0x01; 6921da177e4SLinus Torvalds break; 6931da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 6941da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 6951da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6961da177e4SLinus Torvalds data->length = reclen; 6971da177e4SLinus Torvalds data->operation.operation = 0x03; 6981da177e4SLinus Torvalds break; 6991da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 7001da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 7011da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 7021da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 7031da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 7041da177e4SLinus Torvalds data->length = reclen; 7051da177e4SLinus Torvalds data->operation.operation = 0x06; 7061da177e4SLinus Torvalds break; 7071da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 7081da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 7091da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 7101da177e4SLinus Torvalds data->length = reclen; 7111da177e4SLinus Torvalds data->operation.operation = 0x16; 7121da177e4SLinus Torvalds break; 7131da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_COUNT: 7141da177e4SLinus Torvalds data->operation.operation = 0x06; 7151da177e4SLinus Torvalds break; 7161da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 7171da177e4SLinus Torvalds data->length = reclen; 7181da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 7191da177e4SLinus Torvalds data->operation.operation = 0x0b; 7201da177e4SLinus Torvalds break; 7211da177e4SLinus Torvalds default: 722fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record " 723fc19f381SStefan Haberland "opcode 0x%x", cmd); 7241da177e4SLinus Torvalds } 725b44b0ab3SStefan Weinhuber set_ch_t(&data->seek_addr, 726b44b0ab3SStefan Weinhuber trk / private->rdc_data.trk_per_cyl, 727b44b0ab3SStefan Weinhuber trk % private->rdc_data.trk_per_cyl); 728b44b0ab3SStefan Weinhuber data->search_arg.cyl = data->seek_addr.cyl; 729b44b0ab3SStefan Weinhuber data->search_arg.head = data->seek_addr.head; 7301da177e4SLinus Torvalds data->search_arg.record = rec_on_trk; 7311da177e4SLinus Torvalds } 7321da177e4SLinus Torvalds 7331da177e4SLinus Torvalds /* 7341da177e4SLinus Torvalds * Returns 1 if the block is one of the special blocks that needs 7351da177e4SLinus Torvalds * to get read/written with the KD variant of the command. 7361da177e4SLinus Torvalds * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and 7371da177e4SLinus Torvalds * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. 7381da177e4SLinus Torvalds * Luckily the KD variants differ only by one bit (0x08) from the 7391da177e4SLinus Torvalds * normal variant. So don't wonder about code like: 7401da177e4SLinus Torvalds * if (dasd_eckd_cdl_special(blk_per_trk, recid)) 7411da177e4SLinus Torvalds * ccw->cmd_code |= 0x8; 7421da177e4SLinus Torvalds */ 7431da177e4SLinus Torvalds static inline int 7441da177e4SLinus Torvalds dasd_eckd_cdl_special(int blk_per_trk, int recid) 7451da177e4SLinus Torvalds { 7461da177e4SLinus Torvalds if (recid < 3) 7471da177e4SLinus Torvalds return 1; 7481da177e4SLinus Torvalds if (recid < blk_per_trk) 7491da177e4SLinus Torvalds return 0; 7501da177e4SLinus Torvalds if (recid < 2 * blk_per_trk) 7511da177e4SLinus Torvalds return 1; 7521da177e4SLinus Torvalds return 0; 7531da177e4SLinus Torvalds } 7541da177e4SLinus Torvalds 7551da177e4SLinus Torvalds /* 7561da177e4SLinus Torvalds * Returns the record size for the special blocks of the cdl format. 7571da177e4SLinus Torvalds * Only returns something useful if dasd_eckd_cdl_special is true 7581da177e4SLinus Torvalds * for the recid. 7591da177e4SLinus Torvalds */ 7601da177e4SLinus Torvalds static inline int 7611da177e4SLinus Torvalds dasd_eckd_cdl_reclen(int recid) 7621da177e4SLinus Torvalds { 7631da177e4SLinus Torvalds if (recid < 3) 7641da177e4SLinus Torvalds return sizes_trk0[recid]; 7651da177e4SLinus Torvalds return LABEL_SIZE; 7661da177e4SLinus Torvalds } 767b206181dSStefan Haberland /* create unique id from private structure. */ 768b206181dSStefan Haberland static void create_uid(struct dasd_eckd_private *private) 7693d052595SHorst Hummel { 7704abb08c2SStefan Weinhuber int count; 771b206181dSStefan Haberland struct dasd_uid *uid; 7723d052595SHorst Hummel 7732dedf0d9SStefan Haberland uid = &private->uid; 7743d052595SHorst Hummel memset(uid, 0, sizeof(struct dasd_uid)); 7754abb08c2SStefan Weinhuber memcpy(uid->vendor, private->ned->HDA_manufacturer, 7763d052595SHorst Hummel sizeof(uid->vendor) - 1); 7773d052595SHorst Hummel EBCASC(uid->vendor, sizeof(uid->vendor) - 1); 7784abb08c2SStefan Weinhuber memcpy(uid->serial, private->ned->HDA_location, 7793d052595SHorst Hummel sizeof(uid->serial) - 1); 7803d052595SHorst Hummel EBCASC(uid->serial, sizeof(uid->serial) - 1); 7814abb08c2SStefan Weinhuber uid->ssid = private->gneq->subsystemID; 782a419aef8SJoe Perches uid->real_unit_addr = private->ned->unit_addr; 7834abb08c2SStefan Weinhuber if (private->sneq) { 7844abb08c2SStefan Weinhuber uid->type = private->sneq->sua_flags; 7858e09f215SStefan Weinhuber if (uid->type == UA_BASE_PAV_ALIAS) 7864abb08c2SStefan Weinhuber uid->base_unit_addr = private->sneq->base_unit_addr; 7878e09f215SStefan Weinhuber } else { 7888e09f215SStefan Weinhuber uid->type = UA_BASE_DEVICE; 7898e09f215SStefan Weinhuber } 7904abb08c2SStefan Weinhuber if (private->vdsneq) { 7914abb08c2SStefan Weinhuber for (count = 0; count < 16; count++) { 7924abb08c2SStefan Weinhuber sprintf(uid->vduit+2*count, "%02x", 7934abb08c2SStefan Weinhuber private->vdsneq->uit[count]); 7944abb08c2SStefan Weinhuber } 7954abb08c2SStefan Weinhuber } 796b206181dSStefan Haberland } 797b206181dSStefan Haberland 798b206181dSStefan Haberland /* 799b206181dSStefan Haberland * Generate device unique id that specifies the physical device. 800b206181dSStefan Haberland */ 801b206181dSStefan Haberland static int dasd_eckd_generate_uid(struct dasd_device *device) 802b206181dSStefan Haberland { 803b206181dSStefan Haberland struct dasd_eckd_private *private; 804b206181dSStefan Haberland unsigned long flags; 805b206181dSStefan Haberland 806b206181dSStefan Haberland private = (struct dasd_eckd_private *) device->private; 807b206181dSStefan Haberland if (!private) 808b206181dSStefan Haberland return -ENODEV; 809b206181dSStefan Haberland if (!private->ned || !private->gneq) 810b206181dSStefan Haberland return -ENODEV; 811b206181dSStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 812b206181dSStefan Haberland create_uid(private); 8132dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 8143d052595SHorst Hummel return 0; 8153d052595SHorst Hummel } 8163d052595SHorst Hummel 8172dedf0d9SStefan Haberland static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid) 8182dedf0d9SStefan Haberland { 8192dedf0d9SStefan Haberland struct dasd_eckd_private *private; 8202dedf0d9SStefan Haberland unsigned long flags; 8212dedf0d9SStefan Haberland 8222dedf0d9SStefan Haberland if (device->private) { 8232dedf0d9SStefan Haberland private = (struct dasd_eckd_private *)device->private; 8242dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 8252dedf0d9SStefan Haberland *uid = private->uid; 8262dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 8272dedf0d9SStefan Haberland return 0; 8282dedf0d9SStefan Haberland } 8292dedf0d9SStefan Haberland return -EINVAL; 8302dedf0d9SStefan Haberland } 8312dedf0d9SStefan Haberland 832b206181dSStefan Haberland /* 833b206181dSStefan Haberland * compare device UID with data of a given dasd_eckd_private structure 834b206181dSStefan Haberland * return 0 for match 835b206181dSStefan Haberland */ 836b206181dSStefan Haberland static int dasd_eckd_compare_path_uid(struct dasd_device *device, 837b206181dSStefan Haberland struct dasd_eckd_private *private) 838b206181dSStefan Haberland { 839b206181dSStefan Haberland struct dasd_uid device_uid; 840b206181dSStefan Haberland 841b206181dSStefan Haberland create_uid(private); 842b206181dSStefan Haberland dasd_eckd_get_uid(device, &device_uid); 843b206181dSStefan Haberland 844b206181dSStefan Haberland return memcmp(&device_uid, &private->uid, sizeof(struct dasd_uid)); 845b206181dSStefan Haberland } 846b206181dSStefan Haberland 847a4d26c6aSStefan Weinhuber static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device, 848a4d26c6aSStefan Weinhuber struct dasd_ccw_req *cqr, 849a4d26c6aSStefan Weinhuber __u8 *rcd_buffer, 850a4d26c6aSStefan Weinhuber __u8 lpm) 85117283b56SCornelia Huck { 85217283b56SCornelia Huck struct ccw1 *ccw; 853a4d26c6aSStefan Weinhuber /* 854a4d26c6aSStefan Weinhuber * buffer has to start with EBCDIC "V1.0" to show 855a4d26c6aSStefan Weinhuber * support for virtual device SNEQ 856a4d26c6aSStefan Weinhuber */ 857a4d26c6aSStefan Weinhuber rcd_buffer[0] = 0xE5; 858a4d26c6aSStefan Weinhuber rcd_buffer[1] = 0xF1; 859a4d26c6aSStefan Weinhuber rcd_buffer[2] = 0x4B; 860a4d26c6aSStefan Weinhuber rcd_buffer[3] = 0xF0; 86117283b56SCornelia Huck 86217283b56SCornelia Huck ccw = cqr->cpaddr; 863a4d26c6aSStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RCD; 864a4d26c6aSStefan Weinhuber ccw->flags = 0; 86517283b56SCornelia Huck ccw->cda = (__u32)(addr_t)rcd_buffer; 866a4d26c6aSStefan Weinhuber ccw->count = DASD_ECKD_RCD_DATA_SIZE; 867a4d26c6aSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 86817283b56SCornelia Huck 8698e09f215SStefan Weinhuber cqr->startdev = device; 8708e09f215SStefan Weinhuber cqr->memdev = device; 8718e09f215SStefan Weinhuber cqr->block = NULL; 87217283b56SCornelia Huck cqr->expires = 10*HZ; 87317283b56SCornelia Huck cqr->lpm = lpm; 874eb6e199bSStefan Weinhuber cqr->retries = 256; 8751aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 87617283b56SCornelia Huck cqr->status = DASD_CQR_FILLED; 877a4d26c6aSStefan Weinhuber set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 878a4d26c6aSStefan Weinhuber } 879a4d26c6aSStefan Weinhuber 8805915a873SStefan Haberland /* 8815915a873SStefan Haberland * Wakeup helper for read_conf 8825915a873SStefan Haberland * if the cqr is not done and needs some error recovery 8835915a873SStefan Haberland * the buffer has to be re-initialized with the EBCDIC "V1.0" 8845915a873SStefan Haberland * to show support for virtual device SNEQ 8855915a873SStefan Haberland */ 8865915a873SStefan Haberland static void read_conf_cb(struct dasd_ccw_req *cqr, void *data) 8875915a873SStefan Haberland { 8885915a873SStefan Haberland struct ccw1 *ccw; 8895915a873SStefan Haberland __u8 *rcd_buffer; 8905915a873SStefan Haberland 8915915a873SStefan Haberland if (cqr->status != DASD_CQR_DONE) { 8925915a873SStefan Haberland ccw = cqr->cpaddr; 8935915a873SStefan Haberland rcd_buffer = (__u8 *)((addr_t) ccw->cda); 8945915a873SStefan Haberland memset(rcd_buffer, 0, sizeof(*rcd_buffer)); 8955915a873SStefan Haberland 8965915a873SStefan Haberland rcd_buffer[0] = 0xE5; 8975915a873SStefan Haberland rcd_buffer[1] = 0xF1; 8985915a873SStefan Haberland rcd_buffer[2] = 0x4B; 8995915a873SStefan Haberland rcd_buffer[3] = 0xF0; 9005915a873SStefan Haberland } 9015915a873SStefan Haberland dasd_wakeup_cb(cqr, data); 9025915a873SStefan Haberland } 9035915a873SStefan Haberland 904a4d26c6aSStefan Weinhuber static int dasd_eckd_read_conf_immediately(struct dasd_device *device, 905a4d26c6aSStefan Weinhuber struct dasd_ccw_req *cqr, 906a4d26c6aSStefan Weinhuber __u8 *rcd_buffer, 907a4d26c6aSStefan Weinhuber __u8 lpm) 908a4d26c6aSStefan Weinhuber { 909a4d26c6aSStefan Weinhuber struct ciw *ciw; 910a4d26c6aSStefan Weinhuber int rc; 911a4d26c6aSStefan Weinhuber /* 912a4d26c6aSStefan Weinhuber * sanity check: scan for RCD command in extended SenseID data 913a4d26c6aSStefan Weinhuber * some devices do not support RCD 914a4d26c6aSStefan Weinhuber */ 915a4d26c6aSStefan Weinhuber ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 916a4d26c6aSStefan Weinhuber if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) 917a4d26c6aSStefan Weinhuber return -EOPNOTSUPP; 918a4d26c6aSStefan Weinhuber 919a4d26c6aSStefan Weinhuber dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm); 920a4d26c6aSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 9215a27e60dSStefan Weinhuber set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 922a4d26c6aSStefan Weinhuber cqr->retries = 5; 9235915a873SStefan Haberland cqr->callback = read_conf_cb; 924a4d26c6aSStefan Weinhuber rc = dasd_sleep_on_immediatly(cqr); 925a4d26c6aSStefan Weinhuber return rc; 92617283b56SCornelia Huck } 92717283b56SCornelia Huck 92817283b56SCornelia Huck static int dasd_eckd_read_conf_lpm(struct dasd_device *device, 92917283b56SCornelia Huck void **rcd_buffer, 93017283b56SCornelia Huck int *rcd_buffer_size, __u8 lpm) 93117283b56SCornelia Huck { 93217283b56SCornelia Huck struct ciw *ciw; 93317283b56SCornelia Huck char *rcd_buf = NULL; 93417283b56SCornelia Huck int ret; 93517283b56SCornelia Huck struct dasd_ccw_req *cqr; 93617283b56SCornelia Huck 93717283b56SCornelia Huck /* 938a4d26c6aSStefan Weinhuber * sanity check: scan for RCD command in extended SenseID data 939a4d26c6aSStefan Weinhuber * some devices do not support RCD 94017283b56SCornelia Huck */ 94117283b56SCornelia Huck ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 942a4d26c6aSStefan Weinhuber if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) { 94317283b56SCornelia Huck ret = -EOPNOTSUPP; 94417283b56SCornelia Huck goto out_error; 94517283b56SCornelia Huck } 946a4d26c6aSStefan Weinhuber rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA); 94717283b56SCornelia Huck if (!rcd_buf) { 94817283b56SCornelia Huck ret = -ENOMEM; 94917283b56SCornelia Huck goto out_error; 95017283b56SCornelia Huck } 951a4d26c6aSStefan Weinhuber cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, 952a4d26c6aSStefan Weinhuber 0, /* use rcd_buf as data ara */ 953a4d26c6aSStefan Weinhuber device); 95417283b56SCornelia Huck if (IS_ERR(cqr)) { 955a4d26c6aSStefan Weinhuber DBF_DEV_EVENT(DBF_WARNING, device, "%s", 956a4d26c6aSStefan Weinhuber "Could not allocate RCD request"); 957a4d26c6aSStefan Weinhuber ret = -ENOMEM; 95817283b56SCornelia Huck goto out_error; 95917283b56SCornelia Huck } 960a4d26c6aSStefan Weinhuber dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm); 9615915a873SStefan Haberland cqr->callback = read_conf_cb; 96217283b56SCornelia Huck ret = dasd_sleep_on(cqr); 96317283b56SCornelia Huck /* 96417283b56SCornelia Huck * on success we update the user input parms 96517283b56SCornelia Huck */ 9668e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 96717283b56SCornelia Huck if (ret) 96817283b56SCornelia Huck goto out_error; 96917283b56SCornelia Huck 970a4d26c6aSStefan Weinhuber *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE; 97117283b56SCornelia Huck *rcd_buffer = rcd_buf; 97217283b56SCornelia Huck return 0; 97317283b56SCornelia Huck out_error: 97417283b56SCornelia Huck kfree(rcd_buf); 97517283b56SCornelia Huck *rcd_buffer = NULL; 97617283b56SCornelia Huck *rcd_buffer_size = 0; 97717283b56SCornelia Huck return ret; 97817283b56SCornelia Huck } 97917283b56SCornelia Huck 9804abb08c2SStefan Weinhuber static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private) 9814abb08c2SStefan Weinhuber { 9824abb08c2SStefan Weinhuber 9834abb08c2SStefan Weinhuber struct dasd_sneq *sneq; 9844abb08c2SStefan Weinhuber int i, count; 9854abb08c2SStefan Weinhuber 9864abb08c2SStefan Weinhuber private->ned = NULL; 9874abb08c2SStefan Weinhuber private->sneq = NULL; 9884abb08c2SStefan Weinhuber private->vdsneq = NULL; 9894abb08c2SStefan Weinhuber private->gneq = NULL; 9904abb08c2SStefan Weinhuber count = private->conf_len / sizeof(struct dasd_sneq); 9914abb08c2SStefan Weinhuber sneq = (struct dasd_sneq *)private->conf_data; 9924abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 9934abb08c2SStefan Weinhuber if (sneq->flags.identifier == 1 && sneq->format == 1) 9944abb08c2SStefan Weinhuber private->sneq = sneq; 9954abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 1 && sneq->format == 4) 9964abb08c2SStefan Weinhuber private->vdsneq = (struct vd_sneq *)sneq; 9974abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 2) 9984abb08c2SStefan Weinhuber private->gneq = (struct dasd_gneq *)sneq; 9994abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 3 && sneq->res1 == 1) 10004abb08c2SStefan Weinhuber private->ned = (struct dasd_ned *)sneq; 10014abb08c2SStefan Weinhuber sneq++; 10024abb08c2SStefan Weinhuber } 10034abb08c2SStefan Weinhuber if (!private->ned || !private->gneq) { 10044abb08c2SStefan Weinhuber private->ned = NULL; 10054abb08c2SStefan Weinhuber private->sneq = NULL; 10064abb08c2SStefan Weinhuber private->vdsneq = NULL; 10074abb08c2SStefan Weinhuber private->gneq = NULL; 10084abb08c2SStefan Weinhuber return -EINVAL; 10094abb08c2SStefan Weinhuber } 10104abb08c2SStefan Weinhuber return 0; 10114abb08c2SStefan Weinhuber 10124abb08c2SStefan Weinhuber }; 10134abb08c2SStefan Weinhuber 10144abb08c2SStefan Weinhuber static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len) 10154abb08c2SStefan Weinhuber { 10164abb08c2SStefan Weinhuber struct dasd_gneq *gneq; 10174abb08c2SStefan Weinhuber int i, count, found; 10184abb08c2SStefan Weinhuber 10194abb08c2SStefan Weinhuber count = conf_len / sizeof(*gneq); 10204abb08c2SStefan Weinhuber gneq = (struct dasd_gneq *)conf_data; 10214abb08c2SStefan Weinhuber found = 0; 10224abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 10234abb08c2SStefan Weinhuber if (gneq->flags.identifier == 2) { 10244abb08c2SStefan Weinhuber found = 1; 10254abb08c2SStefan Weinhuber break; 10264abb08c2SStefan Weinhuber } 10274abb08c2SStefan Weinhuber gneq++; 10284abb08c2SStefan Weinhuber } 10294abb08c2SStefan Weinhuber if (found) 10304abb08c2SStefan Weinhuber return ((char *)gneq)[18] & 0x07; 10314abb08c2SStefan Weinhuber else 10324abb08c2SStefan Weinhuber return 0; 10334abb08c2SStefan Weinhuber } 10344abb08c2SStefan Weinhuber 1035c7c0c9deSStefan Haberland static void dasd_eckd_clear_conf_data(struct dasd_device *device) 1036c7c0c9deSStefan Haberland { 1037c7c0c9deSStefan Haberland struct dasd_eckd_private *private; 1038c7c0c9deSStefan Haberland int i; 1039c7c0c9deSStefan Haberland 1040c7c0c9deSStefan Haberland private = (struct dasd_eckd_private *) device->private; 1041c7c0c9deSStefan Haberland private->conf_data = NULL; 1042c7c0c9deSStefan Haberland private->conf_len = 0; 1043c7c0c9deSStefan Haberland for (i = 0; i < 8; i++) { 1044c7c0c9deSStefan Haberland kfree(private->path_conf_data[i]); 1045c7c0c9deSStefan Haberland private->path_conf_data[i] = NULL; 1046c7c0c9deSStefan Haberland } 1047c7c0c9deSStefan Haberland } 1048c7c0c9deSStefan Haberland 1049c7c0c9deSStefan Haberland 10504abb08c2SStefan Weinhuber static int dasd_eckd_read_conf(struct dasd_device *device) 10511da177e4SLinus Torvalds { 10521da177e4SLinus Torvalds void *conf_data; 10531da177e4SLinus Torvalds int conf_len, conf_data_saved; 1054b179b037SStefan Haberland int rc, path_err, pos; 1055a4d26c6aSStefan Weinhuber __u8 lpm, opm; 1056b206181dSStefan Haberland struct dasd_eckd_private *private, path_private; 1057a4d26c6aSStefan Weinhuber struct dasd_path *path_data; 1058b206181dSStefan Haberland struct dasd_uid *uid; 1059b206181dSStefan Haberland char print_path_uid[60], print_device_uid[60]; 10601da177e4SLinus Torvalds 10611da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 1062a4d26c6aSStefan Weinhuber path_data = &device->path_data; 1063a4d26c6aSStefan Weinhuber opm = ccw_device_get_path_mask(device->cdev); 10641da177e4SLinus Torvalds conf_data_saved = 0; 106555d3a85cSStefan Haberland path_err = 0; 10661da177e4SLinus Torvalds /* get configuration data per operational path */ 10671da177e4SLinus Torvalds for (lpm = 0x80; lpm; lpm>>= 1) { 1068b206181dSStefan Haberland if (!(lpm & opm)) 1069b206181dSStefan Haberland continue; 107017283b56SCornelia Huck rc = dasd_eckd_read_conf_lpm(device, &conf_data, 10711da177e4SLinus Torvalds &conf_len, lpm); 10721da177e4SLinus Torvalds if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ 1073b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 10741da177e4SLinus Torvalds "Read configuration data returned " 1075b8ed5dd5SStefan Haberland "error %d", rc); 10761da177e4SLinus Torvalds return rc; 10771da177e4SLinus Torvalds } 10781da177e4SLinus Torvalds if (conf_data == NULL) { 1079b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1080b8ed5dd5SStefan Haberland "No configuration data " 1081b8ed5dd5SStefan Haberland "retrieved"); 1082a4d26c6aSStefan Weinhuber /* no further analysis possible */ 1083a4d26c6aSStefan Weinhuber path_data->opm |= lpm; 1084d133a960SGabriel Craciunescu continue; /* no error */ 10851da177e4SLinus Torvalds } 10861da177e4SLinus Torvalds /* save first valid configuration data */ 10871da177e4SLinus Torvalds if (!conf_data_saved) { 1088c7c0c9deSStefan Haberland /* initially clear previously stored conf_data */ 1089c7c0c9deSStefan Haberland dasd_eckd_clear_conf_data(device); 10904abb08c2SStefan Weinhuber private->conf_data = conf_data; 10914abb08c2SStefan Weinhuber private->conf_len = conf_len; 10924abb08c2SStefan Weinhuber if (dasd_eckd_identify_conf_parts(private)) { 10934abb08c2SStefan Weinhuber private->conf_data = NULL; 10944abb08c2SStefan Weinhuber private->conf_len = 0; 10954abb08c2SStefan Weinhuber kfree(conf_data); 10964abb08c2SStefan Weinhuber continue; 10974abb08c2SStefan Weinhuber } 1098c7c0c9deSStefan Haberland pos = pathmask_to_pos(lpm); 1099c7c0c9deSStefan Haberland /* store per path conf_data */ 1100c7c0c9deSStefan Haberland private->path_conf_data[pos] = 1101c7c0c9deSStefan Haberland (struct dasd_conf_data *) conf_data; 1102b206181dSStefan Haberland /* 1103b206181dSStefan Haberland * build device UID that other path data 1104b206181dSStefan Haberland * can be compared to it 1105b206181dSStefan Haberland */ 1106b206181dSStefan Haberland dasd_eckd_generate_uid(device); 11071da177e4SLinus Torvalds conf_data_saved++; 1108b206181dSStefan Haberland } else { 1109b206181dSStefan Haberland path_private.conf_data = conf_data; 1110b206181dSStefan Haberland path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1111b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts( 1112b206181dSStefan Haberland &path_private)) { 1113b206181dSStefan Haberland path_private.conf_data = NULL; 1114b206181dSStefan Haberland path_private.conf_len = 0; 1115b206181dSStefan Haberland kfree(conf_data); 1116b206181dSStefan Haberland continue; 1117b206181dSStefan Haberland } 1118b206181dSStefan Haberland if (dasd_eckd_compare_path_uid( 1119b206181dSStefan Haberland device, &path_private)) { 1120b206181dSStefan Haberland uid = &path_private.uid; 1121b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1122b206181dSStefan Haberland snprintf(print_path_uid, 1123b206181dSStefan Haberland sizeof(print_path_uid), 1124b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1125b206181dSStefan Haberland uid->vendor, uid->serial, 1126b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1127b206181dSStefan Haberland uid->vduit); 1128b206181dSStefan Haberland else 1129b206181dSStefan Haberland snprintf(print_path_uid, 1130b206181dSStefan Haberland sizeof(print_path_uid), 1131b206181dSStefan Haberland "%s.%s.%04x.%02x", 1132b206181dSStefan Haberland uid->vendor, uid->serial, 1133b206181dSStefan Haberland uid->ssid, 1134b206181dSStefan Haberland uid->real_unit_addr); 1135b206181dSStefan Haberland uid = &private->uid; 1136b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1137b206181dSStefan Haberland snprintf(print_device_uid, 1138b206181dSStefan Haberland sizeof(print_device_uid), 1139b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1140b206181dSStefan Haberland uid->vendor, uid->serial, 1141b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1142b206181dSStefan Haberland uid->vduit); 1143b206181dSStefan Haberland else 1144b206181dSStefan Haberland snprintf(print_device_uid, 1145b206181dSStefan Haberland sizeof(print_device_uid), 1146b206181dSStefan Haberland "%s.%s.%04x.%02x", 1147b206181dSStefan Haberland uid->vendor, uid->serial, 1148b206181dSStefan Haberland uid->ssid, 1149b206181dSStefan Haberland uid->real_unit_addr); 1150b206181dSStefan Haberland dev_err(&device->cdev->dev, 1151b206181dSStefan Haberland "Not all channel paths lead to " 1152b206181dSStefan Haberland "the same device, path %02X leads to " 1153b206181dSStefan Haberland "device %s instead of %s\n", lpm, 1154b206181dSStefan Haberland print_path_uid, print_device_uid); 115555d3a85cSStefan Haberland path_err = -EINVAL; 11565db8440cSStefan Haberland path_data->cablepm |= lpm; 115755d3a85cSStefan Haberland continue; 1158b206181dSStefan Haberland } 1159c7c0c9deSStefan Haberland pos = pathmask_to_pos(lpm); 1160c7c0c9deSStefan Haberland /* store per path conf_data */ 1161c7c0c9deSStefan Haberland private->path_conf_data[pos] = 1162c7c0c9deSStefan Haberland (struct dasd_conf_data *) conf_data; 1163b206181dSStefan Haberland path_private.conf_data = NULL; 1164b206181dSStefan Haberland path_private.conf_len = 0; 11651da177e4SLinus Torvalds } 11664abb08c2SStefan Weinhuber switch (dasd_eckd_path_access(conf_data, conf_len)) { 11671da177e4SLinus Torvalds case 0x02: 11681da177e4SLinus Torvalds path_data->npm |= lpm; 11691da177e4SLinus Torvalds break; 11701da177e4SLinus Torvalds case 0x03: 11711da177e4SLinus Torvalds path_data->ppm |= lpm; 11721da177e4SLinus Torvalds break; 11731da177e4SLinus Torvalds } 1174ccc0e7dcSStefan Haberland if (!path_data->opm) { 1175ccc0e7dcSStefan Haberland path_data->opm = lpm; 1176ccc0e7dcSStefan Haberland dasd_generic_path_operational(device); 1177ccc0e7dcSStefan Haberland } else { 1178a4d26c6aSStefan Weinhuber path_data->opm |= lpm; 1179ccc0e7dcSStefan Haberland } 11805db8440cSStefan Haberland /* 11815db8440cSStefan Haberland * if the path is used 11825db8440cSStefan Haberland * it should not be in one of the negative lists 11835db8440cSStefan Haberland */ 11845db8440cSStefan Haberland path_data->cablepm &= ~lpm; 11855db8440cSStefan Haberland path_data->hpfpm &= ~lpm; 11865db8440cSStefan Haberland path_data->cuirpm &= ~lpm; 11871da177e4SLinus Torvalds } 1188b206181dSStefan Haberland 118955d3a85cSStefan Haberland return path_err; 11901da177e4SLinus Torvalds } 11911da177e4SLinus Torvalds 1192a4d26c6aSStefan Weinhuber static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm) 1193a4d26c6aSStefan Weinhuber { 1194a4d26c6aSStefan Weinhuber struct dasd_eckd_private *private; 1195a4d26c6aSStefan Weinhuber int mdc; 1196a4d26c6aSStefan Weinhuber u32 fcx_max_data; 1197a4d26c6aSStefan Weinhuber 1198a4d26c6aSStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 1199a4d26c6aSStefan Weinhuber if (private->fcx_max_data) { 1200a4d26c6aSStefan Weinhuber mdc = ccw_device_get_mdc(device->cdev, lpm); 1201a4d26c6aSStefan Weinhuber if ((mdc < 0)) { 1202a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1203a4d26c6aSStefan Weinhuber "Detecting the maximum data size for zHPF " 1204a4d26c6aSStefan Weinhuber "requests failed (rc=%d) for a new path %x\n", 1205a4d26c6aSStefan Weinhuber mdc, lpm); 1206a4d26c6aSStefan Weinhuber return mdc; 1207a4d26c6aSStefan Weinhuber } 1208a4d26c6aSStefan Weinhuber fcx_max_data = mdc * FCX_MAX_DATA_FACTOR; 1209a4d26c6aSStefan Weinhuber if (fcx_max_data < private->fcx_max_data) { 1210a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1211a4d26c6aSStefan Weinhuber "The maximum data size for zHPF requests %u " 1212a4d26c6aSStefan Weinhuber "on a new path %x is below the active maximum " 1213a4d26c6aSStefan Weinhuber "%u\n", fcx_max_data, lpm, 1214a4d26c6aSStefan Weinhuber private->fcx_max_data); 1215a4d26c6aSStefan Weinhuber return -EACCES; 1216a4d26c6aSStefan Weinhuber } 1217a4d26c6aSStefan Weinhuber } 1218a4d26c6aSStefan Weinhuber return 0; 1219a4d26c6aSStefan Weinhuber } 1220a4d26c6aSStefan Weinhuber 1221b206181dSStefan Haberland static int rebuild_device_uid(struct dasd_device *device, 1222b206181dSStefan Haberland struct path_verification_work_data *data) 1223b206181dSStefan Haberland { 1224b206181dSStefan Haberland struct dasd_eckd_private *private; 1225b206181dSStefan Haberland struct dasd_path *path_data; 1226b206181dSStefan Haberland __u8 lpm, opm; 1227b206181dSStefan Haberland int rc; 1228b206181dSStefan Haberland 1229b206181dSStefan Haberland rc = -ENODEV; 1230b206181dSStefan Haberland private = (struct dasd_eckd_private *) device->private; 1231b206181dSStefan Haberland path_data = &device->path_data; 1232b206181dSStefan Haberland opm = device->path_data.opm; 1233b206181dSStefan Haberland 1234b206181dSStefan Haberland for (lpm = 0x80; lpm; lpm >>= 1) { 1235b206181dSStefan Haberland if (!(lpm & opm)) 1236b206181dSStefan Haberland continue; 1237b206181dSStefan Haberland memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1238b206181dSStefan Haberland memset(&data->cqr, 0, sizeof(data->cqr)); 1239b206181dSStefan Haberland data->cqr.cpaddr = &data->ccw; 1240b206181dSStefan Haberland rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1241b206181dSStefan Haberland data->rcd_buffer, 1242b206181dSStefan Haberland lpm); 1243b206181dSStefan Haberland 1244b206181dSStefan Haberland if (rc) { 1245b206181dSStefan Haberland if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */ 1246b206181dSStefan Haberland continue; 1247b206181dSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1248b206181dSStefan Haberland "Read configuration data " 1249b206181dSStefan Haberland "returned error %d", rc); 1250b206181dSStefan Haberland break; 1251b206181dSStefan Haberland } 1252b206181dSStefan Haberland memcpy(private->conf_data, data->rcd_buffer, 1253b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE); 1254b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts(private)) { 1255b206181dSStefan Haberland rc = -ENODEV; 1256b206181dSStefan Haberland } else /* first valid path is enough */ 1257b206181dSStefan Haberland break; 1258b206181dSStefan Haberland } 1259b206181dSStefan Haberland 1260b206181dSStefan Haberland if (!rc) 1261b206181dSStefan Haberland rc = dasd_eckd_generate_uid(device); 1262b206181dSStefan Haberland 1263b206181dSStefan Haberland return rc; 1264b206181dSStefan Haberland } 1265b206181dSStefan Haberland 1266a4d26c6aSStefan Weinhuber static void do_path_verification_work(struct work_struct *work) 1267a4d26c6aSStefan Weinhuber { 1268a4d26c6aSStefan Weinhuber struct path_verification_work_data *data; 1269a4d26c6aSStefan Weinhuber struct dasd_device *device; 1270b206181dSStefan Haberland struct dasd_eckd_private path_private; 1271b206181dSStefan Haberland struct dasd_uid *uid; 1272b206181dSStefan Haberland __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE]; 12735db8440cSStefan Haberland __u8 lpm, opm, npm, ppm, epm, hpfpm, cablepm; 1274a4d26c6aSStefan Weinhuber unsigned long flags; 1275b206181dSStefan Haberland char print_uid[60]; 1276a4d26c6aSStefan Weinhuber int rc; 1277a4d26c6aSStefan Weinhuber 1278a4d26c6aSStefan Weinhuber data = container_of(work, struct path_verification_work_data, worker); 1279a4d26c6aSStefan Weinhuber device = data->device; 1280a4d26c6aSStefan Weinhuber 1281c8d1c0ffSStefan Haberland /* delay path verification until device was resumed */ 1282c8d1c0ffSStefan Haberland if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 1283c8d1c0ffSStefan Haberland schedule_work(work); 1284c8d1c0ffSStefan Haberland return; 1285c8d1c0ffSStefan Haberland } 12861eb38023SStefan Haberland /* check if path verification already running and delay if so */ 12871eb38023SStefan Haberland if (test_and_set_bit(DASD_FLAG_PATH_VERIFY, &device->flags)) { 12881eb38023SStefan Haberland schedule_work(work); 12891eb38023SStefan Haberland return; 12901eb38023SStefan Haberland } 1291a4d26c6aSStefan Weinhuber opm = 0; 1292a4d26c6aSStefan Weinhuber npm = 0; 1293a4d26c6aSStefan Weinhuber ppm = 0; 1294a4d26c6aSStefan Weinhuber epm = 0; 12955db8440cSStefan Haberland hpfpm = 0; 12965db8440cSStefan Haberland cablepm = 0; 12975db8440cSStefan Haberland 1298a4d26c6aSStefan Weinhuber for (lpm = 0x80; lpm; lpm >>= 1) { 1299b206181dSStefan Haberland if (!(lpm & data->tbvpm)) 1300b206181dSStefan Haberland continue; 1301b206181dSStefan Haberland memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1302a4d26c6aSStefan Weinhuber memset(&data->cqr, 0, sizeof(data->cqr)); 1303a4d26c6aSStefan Weinhuber data->cqr.cpaddr = &data->ccw; 1304a4d26c6aSStefan Weinhuber rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1305a4d26c6aSStefan Weinhuber data->rcd_buffer, 1306a4d26c6aSStefan Weinhuber lpm); 1307a4d26c6aSStefan Weinhuber if (!rc) { 1308a4d26c6aSStefan Weinhuber switch (dasd_eckd_path_access(data->rcd_buffer, 1309b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE) 1310b206181dSStefan Haberland ) { 1311a4d26c6aSStefan Weinhuber case 0x02: 1312a4d26c6aSStefan Weinhuber npm |= lpm; 1313a4d26c6aSStefan Weinhuber break; 1314a4d26c6aSStefan Weinhuber case 0x03: 1315a4d26c6aSStefan Weinhuber ppm |= lpm; 1316a4d26c6aSStefan Weinhuber break; 1317a4d26c6aSStefan Weinhuber } 1318a4d26c6aSStefan Weinhuber opm |= lpm; 1319a4d26c6aSStefan Weinhuber } else if (rc == -EOPNOTSUPP) { 1320a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1321a4d26c6aSStefan Weinhuber "path verification: No configuration " 1322a4d26c6aSStefan Weinhuber "data retrieved"); 1323a4d26c6aSStefan Weinhuber opm |= lpm; 1324a4d26c6aSStefan Weinhuber } else if (rc == -EAGAIN) { 1325a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1326a4d26c6aSStefan Weinhuber "path verification: device is stopped," 1327a4d26c6aSStefan Weinhuber " try again later"); 1328a4d26c6aSStefan Weinhuber epm |= lpm; 1329a4d26c6aSStefan Weinhuber } else { 1330a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1331a4d26c6aSStefan Weinhuber "Reading device feature codes failed " 1332a4d26c6aSStefan Weinhuber "(rc=%d) for new path %x\n", rc, lpm); 1333a4d26c6aSStefan Weinhuber continue; 1334a4d26c6aSStefan Weinhuber } 1335a4d26c6aSStefan Weinhuber if (verify_fcx_max_data(device, lpm)) { 1336a4d26c6aSStefan Weinhuber opm &= ~lpm; 1337a4d26c6aSStefan Weinhuber npm &= ~lpm; 1338a4d26c6aSStefan Weinhuber ppm &= ~lpm; 13395db8440cSStefan Haberland hpfpm |= lpm; 1340b206181dSStefan Haberland continue; 1341b206181dSStefan Haberland } 1342b206181dSStefan Haberland 1343b206181dSStefan Haberland /* 1344b206181dSStefan Haberland * save conf_data for comparison after 1345b206181dSStefan Haberland * rebuild_device_uid may have changed 1346b206181dSStefan Haberland * the original data 1347b206181dSStefan Haberland */ 1348b206181dSStefan Haberland memcpy(&path_rcd_buf, data->rcd_buffer, 1349b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE); 1350b206181dSStefan Haberland path_private.conf_data = (void *) &path_rcd_buf; 1351b206181dSStefan Haberland path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1352b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts(&path_private)) { 1353b206181dSStefan Haberland path_private.conf_data = NULL; 1354b206181dSStefan Haberland path_private.conf_len = 0; 1355b206181dSStefan Haberland continue; 1356b206181dSStefan Haberland } 1357b206181dSStefan Haberland 1358b206181dSStefan Haberland /* 1359b206181dSStefan Haberland * compare path UID with device UID only if at least 1360b206181dSStefan Haberland * one valid path is left 1361b206181dSStefan Haberland * in other case the device UID may have changed and 1362b206181dSStefan Haberland * the first working path UID will be used as device UID 1363b206181dSStefan Haberland */ 1364b206181dSStefan Haberland if (device->path_data.opm && 1365b206181dSStefan Haberland dasd_eckd_compare_path_uid(device, &path_private)) { 1366b206181dSStefan Haberland /* 1367b206181dSStefan Haberland * the comparison was not successful 1368b206181dSStefan Haberland * rebuild the device UID with at least one 1369b206181dSStefan Haberland * known path in case a z/VM hyperswap command 1370b206181dSStefan Haberland * has changed the device 1371b206181dSStefan Haberland * 1372b206181dSStefan Haberland * after this compare again 1373b206181dSStefan Haberland * 1374b206181dSStefan Haberland * if either the rebuild or the recompare fails 1375b206181dSStefan Haberland * the path can not be used 1376b206181dSStefan Haberland */ 1377b206181dSStefan Haberland if (rebuild_device_uid(device, data) || 1378b206181dSStefan Haberland dasd_eckd_compare_path_uid( 1379b206181dSStefan Haberland device, &path_private)) { 1380b206181dSStefan Haberland uid = &path_private.uid; 1381b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1382b206181dSStefan Haberland snprintf(print_uid, sizeof(print_uid), 1383b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1384b206181dSStefan Haberland uid->vendor, uid->serial, 1385b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1386b206181dSStefan Haberland uid->vduit); 1387b206181dSStefan Haberland else 1388b206181dSStefan Haberland snprintf(print_uid, sizeof(print_uid), 1389b206181dSStefan Haberland "%s.%s.%04x.%02x", 1390b206181dSStefan Haberland uid->vendor, uid->serial, 1391b206181dSStefan Haberland uid->ssid, 1392b206181dSStefan Haberland uid->real_unit_addr); 1393b206181dSStefan Haberland dev_err(&device->cdev->dev, 1394b206181dSStefan Haberland "The newly added channel path %02X " 1395b206181dSStefan Haberland "will not be used because it leads " 1396b206181dSStefan Haberland "to a different device %s\n", 1397b206181dSStefan Haberland lpm, print_uid); 1398b206181dSStefan Haberland opm &= ~lpm; 1399b206181dSStefan Haberland npm &= ~lpm; 1400b206181dSStefan Haberland ppm &= ~lpm; 14015db8440cSStefan Haberland cablepm |= lpm; 1402b206181dSStefan Haberland continue; 1403a4d26c6aSStefan Weinhuber } 1404a4d26c6aSStefan Weinhuber } 1405b206181dSStefan Haberland 1406a4d26c6aSStefan Weinhuber /* 1407a4d26c6aSStefan Weinhuber * There is a small chance that a path is lost again between 1408a4d26c6aSStefan Weinhuber * above path verification and the following modification of 1409a4d26c6aSStefan Weinhuber * the device opm mask. We could avoid that race here by using 1410a4d26c6aSStefan Weinhuber * yet another path mask, but we rather deal with this unlikely 1411a4d26c6aSStefan Weinhuber * situation in dasd_start_IO. 1412a4d26c6aSStefan Weinhuber */ 1413a4d26c6aSStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1414a4d26c6aSStefan Weinhuber if (!device->path_data.opm && opm) { 1415a4d26c6aSStefan Weinhuber device->path_data.opm = opm; 14165db8440cSStefan Haberland device->path_data.cablepm &= ~opm; 14175db8440cSStefan Haberland device->path_data.cuirpm &= ~opm; 14185db8440cSStefan Haberland device->path_data.hpfpm &= ~opm; 1419a4d26c6aSStefan Weinhuber dasd_generic_path_operational(device); 14205db8440cSStefan Haberland } else { 1421a4d26c6aSStefan Weinhuber device->path_data.opm |= opm; 14225db8440cSStefan Haberland device->path_data.cablepm &= ~opm; 14235db8440cSStefan Haberland device->path_data.cuirpm &= ~opm; 14245db8440cSStefan Haberland device->path_data.hpfpm &= ~opm; 14255db8440cSStefan Haberland } 1426a4d26c6aSStefan Weinhuber device->path_data.npm |= npm; 1427a4d26c6aSStefan Weinhuber device->path_data.ppm |= ppm; 1428a4d26c6aSStefan Weinhuber device->path_data.tbvpm |= epm; 14295db8440cSStefan Haberland device->path_data.cablepm |= cablepm; 14305db8440cSStefan Haberland device->path_data.hpfpm |= hpfpm; 1431a4d26c6aSStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1432b206181dSStefan Haberland } 14331eb38023SStefan Haberland clear_bit(DASD_FLAG_PATH_VERIFY, &device->flags); 1434a4d26c6aSStefan Weinhuber dasd_put_device(device); 1435a4d26c6aSStefan Weinhuber if (data->isglobal) 1436a4d26c6aSStefan Weinhuber mutex_unlock(&dasd_path_verification_mutex); 1437a4d26c6aSStefan Weinhuber else 1438a4d26c6aSStefan Weinhuber kfree(data); 1439a4d26c6aSStefan Weinhuber } 1440a4d26c6aSStefan Weinhuber 1441a4d26c6aSStefan Weinhuber static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm) 1442a4d26c6aSStefan Weinhuber { 1443a4d26c6aSStefan Weinhuber struct path_verification_work_data *data; 1444a4d26c6aSStefan Weinhuber 1445a4d26c6aSStefan Weinhuber data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA); 1446a4d26c6aSStefan Weinhuber if (!data) { 1447a4d26c6aSStefan Weinhuber if (mutex_trylock(&dasd_path_verification_mutex)) { 1448a4d26c6aSStefan Weinhuber data = path_verification_worker; 1449a4d26c6aSStefan Weinhuber data->isglobal = 1; 1450a4d26c6aSStefan Weinhuber } else 1451a4d26c6aSStefan Weinhuber return -ENOMEM; 1452a4d26c6aSStefan Weinhuber } else { 1453a4d26c6aSStefan Weinhuber memset(data, 0, sizeof(*data)); 1454a4d26c6aSStefan Weinhuber data->isglobal = 0; 1455a4d26c6aSStefan Weinhuber } 1456a4d26c6aSStefan Weinhuber INIT_WORK(&data->worker, do_path_verification_work); 1457a4d26c6aSStefan Weinhuber dasd_get_device(device); 1458a4d26c6aSStefan Weinhuber data->device = device; 1459a4d26c6aSStefan Weinhuber data->tbvpm = lpm; 1460a4d26c6aSStefan Weinhuber schedule_work(&data->worker); 1461a4d26c6aSStefan Weinhuber return 0; 1462a4d26c6aSStefan Weinhuber } 1463a4d26c6aSStefan Weinhuber 14648e09f215SStefan Weinhuber static int dasd_eckd_read_features(struct dasd_device *device) 14658e09f215SStefan Weinhuber { 14668e09f215SStefan Weinhuber struct dasd_psf_prssd_data *prssdp; 14678e09f215SStefan Weinhuber struct dasd_rssd_features *features; 14688e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 14698e09f215SStefan Weinhuber struct ccw1 *ccw; 14708e09f215SStefan Weinhuber int rc; 14718e09f215SStefan Weinhuber struct dasd_eckd_private *private; 14728e09f215SStefan Weinhuber 14738e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 147468d1e5f0SStefan Weinhuber memset(&private->features, 0, sizeof(struct dasd_rssd_features)); 147568b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 14768e09f215SStefan Weinhuber (sizeof(struct dasd_psf_prssd_data) + 14778e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)), 14788e09f215SStefan Weinhuber device); 14798e09f215SStefan Weinhuber if (IS_ERR(cqr)) { 1480b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " 1481b8ed5dd5SStefan Haberland "allocate initialization request"); 14828e09f215SStefan Weinhuber return PTR_ERR(cqr); 14838e09f215SStefan Weinhuber } 14848e09f215SStefan Weinhuber cqr->startdev = device; 14858e09f215SStefan Weinhuber cqr->memdev = device; 14868e09f215SStefan Weinhuber cqr->block = NULL; 1487eb6e199bSStefan Weinhuber cqr->retries = 256; 14888e09f215SStefan Weinhuber cqr->expires = 10 * HZ; 14898e09f215SStefan Weinhuber 14908e09f215SStefan Weinhuber /* Prepare for Read Subsystem Data */ 14918e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 14928e09f215SStefan Weinhuber memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 14938e09f215SStefan Weinhuber prssdp->order = PSF_ORDER_PRSSD; 14948e09f215SStefan Weinhuber prssdp->suborder = 0x41; /* Read Feature Codes */ 14958e09f215SStefan Weinhuber /* all other bytes of prssdp must be zero */ 14968e09f215SStefan Weinhuber 14978e09f215SStefan Weinhuber ccw = cqr->cpaddr; 14988e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PSF; 14998e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_psf_prssd_data); 15008e09f215SStefan Weinhuber ccw->flags |= CCW_FLAG_CC; 15018e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) prssdp; 15028e09f215SStefan Weinhuber 15038e09f215SStefan Weinhuber /* Read Subsystem Data - feature codes */ 15048e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 15058e09f215SStefan Weinhuber memset(features, 0, sizeof(struct dasd_rssd_features)); 15068e09f215SStefan Weinhuber 15078e09f215SStefan Weinhuber ccw++; 15088e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RSSD; 15098e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_rssd_features); 15108e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) features; 15118e09f215SStefan Weinhuber 15121aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 15138e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 15148e09f215SStefan Weinhuber rc = dasd_sleep_on(cqr); 15158e09f215SStefan Weinhuber if (rc == 0) { 15168e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 15178e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 15188e09f215SStefan Weinhuber memcpy(&private->features, features, 15198e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)); 152068d1e5f0SStefan Weinhuber } else 152168d1e5f0SStefan Weinhuber dev_warn(&device->cdev->dev, "Reading device feature codes" 152268d1e5f0SStefan Weinhuber " failed with rc=%d\n", rc); 15238e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 15248e09f215SStefan Weinhuber return rc; 15258e09f215SStefan Weinhuber } 15268e09f215SStefan Weinhuber 15278e09f215SStefan Weinhuber 15283d052595SHorst Hummel /* 152940545573SHorst Hummel * Build CP for Perform Subsystem Function - SSC. 153040545573SHorst Hummel */ 1531f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, 1532f3eb5384SStefan Weinhuber int enable_pav) 153340545573SHorst Hummel { 153440545573SHorst Hummel struct dasd_ccw_req *cqr; 153540545573SHorst Hummel struct dasd_psf_ssc_data *psf_ssc_data; 153640545573SHorst Hummel struct ccw1 *ccw; 153740545573SHorst Hummel 153868b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 153940545573SHorst Hummel sizeof(struct dasd_psf_ssc_data), 154040545573SHorst Hummel device); 154140545573SHorst Hummel 154240545573SHorst Hummel if (IS_ERR(cqr)) { 1543fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 154440545573SHorst Hummel "Could not allocate PSF-SSC request"); 154540545573SHorst Hummel return cqr; 154640545573SHorst Hummel } 154740545573SHorst Hummel psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 154840545573SHorst Hummel psf_ssc_data->order = PSF_ORDER_SSC; 1549626350b6SStefan Weinhuber psf_ssc_data->suborder = 0xc0; 1550f3eb5384SStefan Weinhuber if (enable_pav) { 1551626350b6SStefan Weinhuber psf_ssc_data->suborder |= 0x08; 15528e09f215SStefan Weinhuber psf_ssc_data->reserved[0] = 0x88; 1553f3eb5384SStefan Weinhuber } 155440545573SHorst Hummel ccw = cqr->cpaddr; 155540545573SHorst Hummel ccw->cmd_code = DASD_ECKD_CCW_PSF; 155640545573SHorst Hummel ccw->cda = (__u32)(addr_t)psf_ssc_data; 155740545573SHorst Hummel ccw->count = 66; 155840545573SHorst Hummel 15598e09f215SStefan Weinhuber cqr->startdev = device; 15608e09f215SStefan Weinhuber cqr->memdev = device; 15618e09f215SStefan Weinhuber cqr->block = NULL; 1562eb6e199bSStefan Weinhuber cqr->retries = 256; 156340545573SHorst Hummel cqr->expires = 10*HZ; 15641aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 156540545573SHorst Hummel cqr->status = DASD_CQR_FILLED; 156640545573SHorst Hummel return cqr; 156740545573SHorst Hummel } 156840545573SHorst Hummel 156940545573SHorst Hummel /* 157040545573SHorst Hummel * Perform Subsystem Function. 157140545573SHorst Hummel * It is necessary to trigger CIO for channel revalidation since this 157240545573SHorst Hummel * call might change behaviour of DASD devices. 157340545573SHorst Hummel */ 157440545573SHorst Hummel static int 157512d7b107SStefan Haberland dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav, 157612d7b107SStefan Haberland unsigned long flags) 157740545573SHorst Hummel { 157840545573SHorst Hummel struct dasd_ccw_req *cqr; 157940545573SHorst Hummel int rc; 158040545573SHorst Hummel 1581f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_psf_ssc(device, enable_pav); 158240545573SHorst Hummel if (IS_ERR(cqr)) 158340545573SHorst Hummel return PTR_ERR(cqr); 158440545573SHorst Hummel 158512d7b107SStefan Haberland /* 158612d7b107SStefan Haberland * set flags e.g. turn on failfast, to prevent blocking 158712d7b107SStefan Haberland * the calling function should handle failed requests 158812d7b107SStefan Haberland */ 158912d7b107SStefan Haberland cqr->flags |= flags; 159012d7b107SStefan Haberland 159140545573SHorst Hummel rc = dasd_sleep_on(cqr); 159240545573SHorst Hummel if (!rc) 159340545573SHorst Hummel /* trigger CIO to reprobe devices */ 159440545573SHorst Hummel css_schedule_reprobe(); 159512d7b107SStefan Haberland else if (cqr->intrc == -EAGAIN) 159612d7b107SStefan Haberland rc = -EAGAIN; 159712d7b107SStefan Haberland 15988e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 159940545573SHorst Hummel return rc; 160040545573SHorst Hummel } 160140545573SHorst Hummel 160240545573SHorst Hummel /* 160340545573SHorst Hummel * Valide storage server of current device. 160440545573SHorst Hummel */ 160512d7b107SStefan Haberland static int dasd_eckd_validate_server(struct dasd_device *device, 160612d7b107SStefan Haberland unsigned long flags) 160740545573SHorst Hummel { 160840545573SHorst Hummel int rc; 16098e09f215SStefan Weinhuber struct dasd_eckd_private *private; 1610f3eb5384SStefan Weinhuber int enable_pav; 161140545573SHorst Hummel 1612f9f8d02fSStefan Haberland private = (struct dasd_eckd_private *) device->private; 1613f9f8d02fSStefan Haberland if (private->uid.type == UA_BASE_PAV_ALIAS || 1614f9f8d02fSStefan Haberland private->uid.type == UA_HYPER_PAV_ALIAS) 161512d7b107SStefan Haberland return 0; 161640545573SHorst Hummel if (dasd_nopav || MACHINE_IS_VM) 1617f3eb5384SStefan Weinhuber enable_pav = 0; 1618f3eb5384SStefan Weinhuber else 1619f3eb5384SStefan Weinhuber enable_pav = 1; 162012d7b107SStefan Haberland rc = dasd_eckd_psf_ssc(device, enable_pav, flags); 1621eb6e199bSStefan Weinhuber 162240545573SHorst Hummel /* may be requested feature is not available on server, 162340545573SHorst Hummel * therefore just report error and go ahead */ 1624b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " 1625b8ed5dd5SStefan Haberland "returned rc=%d", private->uid.ssid, rc); 162612d7b107SStefan Haberland return rc; 162740545573SHorst Hummel } 162840545573SHorst Hummel 1629f1633031SStefan Haberland /* 1630f1633031SStefan Haberland * worker to do a validate server in case of a lost pathgroup 1631f1633031SStefan Haberland */ 1632f1633031SStefan Haberland static void dasd_eckd_do_validate_server(struct work_struct *work) 1633f1633031SStefan Haberland { 1634f1633031SStefan Haberland struct dasd_device *device = container_of(work, struct dasd_device, 1635f1633031SStefan Haberland kick_validate); 1636ea4da6eaSStefan Haberland unsigned long flags = 0; 1637ea4da6eaSStefan Haberland 1638ea4da6eaSStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &flags); 1639ea4da6eaSStefan Haberland if (dasd_eckd_validate_server(device, flags) 164012d7b107SStefan Haberland == -EAGAIN) { 164112d7b107SStefan Haberland /* schedule worker again if failed */ 164212d7b107SStefan Haberland schedule_work(&device->kick_validate); 164312d7b107SStefan Haberland return; 164412d7b107SStefan Haberland } 164512d7b107SStefan Haberland 1646f1633031SStefan Haberland dasd_put_device(device); 1647f1633031SStefan Haberland } 1648f1633031SStefan Haberland 1649f1633031SStefan Haberland static void dasd_eckd_kick_validate_server(struct dasd_device *device) 1650f1633031SStefan Haberland { 1651f1633031SStefan Haberland dasd_get_device(device); 165225e2cf1cSStefan Haberland /* exit if device not online or in offline processing */ 165325e2cf1cSStefan Haberland if (test_bit(DASD_FLAG_OFFLINE, &device->flags) || 165425e2cf1cSStefan Haberland device->state < DASD_STATE_ONLINE) { 165525e2cf1cSStefan Haberland dasd_put_device(device); 165625e2cf1cSStefan Haberland return; 165725e2cf1cSStefan Haberland } 1658f1633031SStefan Haberland /* queue call to do_validate_server to the kernel event daemon. */ 1659f2608cd4SStefan Haberland if (!schedule_work(&device->kick_validate)) 1660f2608cd4SStefan Haberland dasd_put_device(device); 1661f1633031SStefan Haberland } 1662f1633031SStefan Haberland 1663ef19298bSStefan Weinhuber static u32 get_fcx_max_data(struct dasd_device *device) 1664ef19298bSStefan Weinhuber { 1665ef19298bSStefan Weinhuber int tpm, mdc; 1666ef19298bSStefan Weinhuber int fcx_in_css, fcx_in_gneq, fcx_in_features; 1667ef19298bSStefan Weinhuber struct dasd_eckd_private *private; 1668ef19298bSStefan Weinhuber 1669ef19298bSStefan Weinhuber if (dasd_nofcx) 1670ef19298bSStefan Weinhuber return 0; 1671ef19298bSStefan Weinhuber /* is transport mode supported? */ 1672ef19298bSStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 1673ef19298bSStefan Weinhuber fcx_in_css = css_general_characteristics.fcx; 1674ef19298bSStefan Weinhuber fcx_in_gneq = private->gneq->reserved2[7] & 0x04; 1675ef19298bSStefan Weinhuber fcx_in_features = private->features.feature[40] & 0x80; 1676ef19298bSStefan Weinhuber tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; 1677ef19298bSStefan Weinhuber 1678ef19298bSStefan Weinhuber if (!tpm) 1679ef19298bSStefan Weinhuber return 0; 1680ef19298bSStefan Weinhuber 1681ef19298bSStefan Weinhuber mdc = ccw_device_get_mdc(device->cdev, 0); 1682ef19298bSStefan Weinhuber if (mdc < 0) { 1683ef19298bSStefan Weinhuber dev_warn(&device->cdev->dev, "Detecting the maximum supported" 1684ef19298bSStefan Weinhuber " data size for zHPF requests failed\n"); 1685ef19298bSStefan Weinhuber return 0; 1686ef19298bSStefan Weinhuber } else 1687ef19298bSStefan Weinhuber return mdc * FCX_MAX_DATA_FACTOR; 1688ef19298bSStefan Weinhuber } 1689ef19298bSStefan Weinhuber 169040545573SHorst Hummel /* 16913d052595SHorst Hummel * Check device characteristics. 16923d052595SHorst Hummel * If the device is accessible using ECKD discipline, the device is enabled. 16933d052595SHorst Hummel */ 16941da177e4SLinus Torvalds static int 16951da177e4SLinus Torvalds dasd_eckd_check_characteristics(struct dasd_device *device) 16961da177e4SLinus Torvalds { 16971da177e4SLinus Torvalds struct dasd_eckd_private *private; 16988e09f215SStefan Weinhuber struct dasd_block *block; 16992dedf0d9SStefan Haberland struct dasd_uid temp_uid; 1700f9f8d02fSStefan Haberland int rc, i; 170133b62a30SStefan Weinhuber int readonly; 17027c8faa86SStefan Haberland unsigned long value; 17031da177e4SLinus Torvalds 1704f1633031SStefan Haberland /* setup work queue for validate server*/ 1705f1633031SStefan Haberland INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server); 1706f1633031SStefan Haberland 1707454e1fa1SPeter Oberparleiter if (!ccw_device_is_pathgroup(device->cdev)) { 1708454e1fa1SPeter Oberparleiter dev_warn(&device->cdev->dev, 1709454e1fa1SPeter Oberparleiter "A channel path group could not be established\n"); 1710454e1fa1SPeter Oberparleiter return -EIO; 1711454e1fa1SPeter Oberparleiter } 1712454e1fa1SPeter Oberparleiter if (!ccw_device_is_multipath(device->cdev)) { 1713454e1fa1SPeter Oberparleiter dev_info(&device->cdev->dev, 1714454e1fa1SPeter Oberparleiter "The DASD is not operating in multipath mode\n"); 1715454e1fa1SPeter Oberparleiter } 17161da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 171792636b15SSebastian Ott if (!private) { 171892636b15SSebastian Ott private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); 171992636b15SSebastian Ott if (!private) { 1720fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1721fc19f381SStefan Haberland "Allocating memory for private DASD data " 1722fc19f381SStefan Haberland "failed\n"); 17231da177e4SLinus Torvalds return -ENOMEM; 17241da177e4SLinus Torvalds } 17251da177e4SLinus Torvalds device->private = (void *) private; 172692636b15SSebastian Ott } else { 172792636b15SSebastian Ott memset(private, 0, sizeof(*private)); 17281da177e4SLinus Torvalds } 17291da177e4SLinus Torvalds /* Invalidate status of initial analysis. */ 17301da177e4SLinus Torvalds private->init_cqr_status = -1; 17311da177e4SLinus Torvalds /* Set default cache operations. */ 17321da177e4SLinus Torvalds private->attrib.operation = DASD_NORMAL_CACHE; 17331da177e4SLinus Torvalds private->attrib.nr_cyl = 0; 17341da177e4SLinus Torvalds 173540545573SHorst Hummel /* Read Configuration Data */ 173640545573SHorst Hummel rc = dasd_eckd_read_conf(device); 173740545573SHorst Hummel if (rc) 17388e09f215SStefan Weinhuber goto out_err1; 173940545573SHorst Hummel 17407c8faa86SStefan Haberland /* set default timeout */ 17417c8faa86SStefan Haberland device->default_expires = DASD_EXPIRES; 17421f1ee9adSHannes Reinecke /* set default retry count */ 17431f1ee9adSHannes Reinecke device->default_retries = DASD_RETRIES; 17441f1ee9adSHannes Reinecke 17457c8faa86SStefan Haberland if (private->gneq) { 17467c8faa86SStefan Haberland value = 1; 17477c8faa86SStefan Haberland for (i = 0; i < private->gneq->timeout.value; i++) 17487c8faa86SStefan Haberland value = 10 * value; 17497c8faa86SStefan Haberland value = value * private->gneq->timeout.number; 17507c8faa86SStefan Haberland /* do not accept useless values */ 17517c8faa86SStefan Haberland if (value != 0 && value <= DASD_EXPIRES_MAX) 17527c8faa86SStefan Haberland device->default_expires = value; 17537c8faa86SStefan Haberland } 17547c8faa86SStefan Haberland 17552dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 17562dedf0d9SStefan Haberland if (temp_uid.type == UA_BASE_DEVICE) { 17578e09f215SStefan Weinhuber block = dasd_alloc_block(); 17588e09f215SStefan Weinhuber if (IS_ERR(block)) { 1759b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1760b8ed5dd5SStefan Haberland "could not allocate dasd " 1761b8ed5dd5SStefan Haberland "block structure"); 17628e09f215SStefan Weinhuber rc = PTR_ERR(block); 17638e09f215SStefan Weinhuber goto out_err1; 17648e09f215SStefan Weinhuber } 17658e09f215SStefan Weinhuber device->block = block; 17668e09f215SStefan Weinhuber block->base = device; 17678e09f215SStefan Weinhuber } 17688e09f215SStefan Weinhuber 1769f9f8d02fSStefan Haberland /* register lcu with alias handling, enable PAV */ 1770f9f8d02fSStefan Haberland rc = dasd_alias_make_device_known_to_lcu(device); 1771f9f8d02fSStefan Haberland if (rc) 17728e09f215SStefan Weinhuber goto out_err2; 1773f9f8d02fSStefan Haberland 177412d7b107SStefan Haberland dasd_eckd_validate_server(device, 0); 1775f4ac1d02SStefan Weinhuber 1776f4ac1d02SStefan Weinhuber /* device may report different configuration data after LCU setup */ 1777f4ac1d02SStefan Weinhuber rc = dasd_eckd_read_conf(device); 177840545573SHorst Hummel if (rc) 17798e09f215SStefan Weinhuber goto out_err3; 17808e09f215SStefan Weinhuber 17818e09f215SStefan Weinhuber /* Read Feature Codes */ 178268d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 178340545573SHorst Hummel 17841da177e4SLinus Torvalds /* Read Device Characteristics */ 178568b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 178668b781feSStefan Haberland &private->rdc_data, 64); 17878e09f215SStefan Weinhuber if (rc) { 1788b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1789b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 17908e09f215SStefan Weinhuber goto out_err3; 17918e09f215SStefan Weinhuber } 179234cd551aSStefan Haberland 179334cd551aSStefan Haberland if ((device->features & DASD_FEATURE_USERAW) && 179434cd551aSStefan Haberland !(private->rdc_data.facilities.RT_in_LR)) { 179534cd551aSStefan Haberland dev_err(&device->cdev->dev, "The storage server does not " 179634cd551aSStefan Haberland "support raw-track access\n"); 179734cd551aSStefan Haberland rc = -EINVAL; 179834cd551aSStefan Haberland goto out_err3; 179934cd551aSStefan Haberland } 180034cd551aSStefan Haberland 1801817f2c84SNikanth Karthikesan /* find the valid cylinder size */ 1802b44b0ab3SStefan Weinhuber if (private->rdc_data.no_cyl == LV_COMPAT_CYL && 1803b44b0ab3SStefan Weinhuber private->rdc_data.long_no_cyl) 1804b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.long_no_cyl; 1805b44b0ab3SStefan Weinhuber else 1806b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.no_cyl; 1807b44b0ab3SStefan Weinhuber 1808ef19298bSStefan Weinhuber private->fcx_max_data = get_fcx_max_data(device); 1809ef19298bSStefan Weinhuber 181033b62a30SStefan Weinhuber readonly = dasd_device_is_ro(device); 181133b62a30SStefan Weinhuber if (readonly) 181233b62a30SStefan Weinhuber set_bit(DASD_FLAG_DEVICE_RO, &device->flags); 181333b62a30SStefan Weinhuber 1814fc19f381SStefan Haberland dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " 181533b62a30SStefan Weinhuber "with %d cylinders, %d heads, %d sectors%s\n", 18161da177e4SLinus Torvalds private->rdc_data.dev_type, 18171da177e4SLinus Torvalds private->rdc_data.dev_model, 18181da177e4SLinus Torvalds private->rdc_data.cu_type, 18191da177e4SLinus Torvalds private->rdc_data.cu_model.model, 1820b44b0ab3SStefan Weinhuber private->real_cyl, 18211da177e4SLinus Torvalds private->rdc_data.trk_per_cyl, 182233b62a30SStefan Weinhuber private->rdc_data.sec_per_trk, 182333b62a30SStefan Weinhuber readonly ? ", read-only device" : ""); 18248e09f215SStefan Weinhuber return 0; 18258e09f215SStefan Weinhuber 18268e09f215SStefan Weinhuber out_err3: 18278e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 18288e09f215SStefan Weinhuber out_err2: 18298e09f215SStefan Weinhuber dasd_free_block(device->block); 18308e09f215SStefan Weinhuber device->block = NULL; 18318e09f215SStefan Weinhuber out_err1: 18324abb08c2SStefan Weinhuber kfree(private->conf_data); 18338e09f215SStefan Weinhuber kfree(device->private); 18348e09f215SStefan Weinhuber device->private = NULL; 18353d052595SHorst Hummel return rc; 18361da177e4SLinus Torvalds } 18371da177e4SLinus Torvalds 18388e09f215SStefan Weinhuber static void dasd_eckd_uncheck_device(struct dasd_device *device) 18398e09f215SStefan Weinhuber { 18404abb08c2SStefan Weinhuber struct dasd_eckd_private *private; 1841b179b037SStefan Haberland int i; 18424abb08c2SStefan Weinhuber 18434abb08c2SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 18448e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 18454abb08c2SStefan Weinhuber private->ned = NULL; 18464abb08c2SStefan Weinhuber private->sneq = NULL; 18474abb08c2SStefan Weinhuber private->vdsneq = NULL; 18484abb08c2SStefan Weinhuber private->gneq = NULL; 18494abb08c2SStefan Weinhuber private->conf_len = 0; 1850b179b037SStefan Haberland for (i = 0; i < 8; i++) { 1851b179b037SStefan Haberland kfree(private->path_conf_data[i]); 1852b179b037SStefan Haberland if ((__u8 *)private->path_conf_data[i] == 1853b179b037SStefan Haberland private->conf_data) { 1854b179b037SStefan Haberland private->conf_data = NULL; 1855b179b037SStefan Haberland private->conf_len = 0; 1856b179b037SStefan Haberland } 1857b179b037SStefan Haberland private->path_conf_data[i] = NULL; 1858b179b037SStefan Haberland } 18594abb08c2SStefan Weinhuber kfree(private->conf_data); 18604abb08c2SStefan Weinhuber private->conf_data = NULL; 18618e09f215SStefan Weinhuber } 18628e09f215SStefan Weinhuber 18631da177e4SLinus Torvalds static struct dasd_ccw_req * 18641da177e4SLinus Torvalds dasd_eckd_analysis_ccw(struct dasd_device *device) 18651da177e4SLinus Torvalds { 18661da177e4SLinus Torvalds struct dasd_eckd_private *private; 18671da177e4SLinus Torvalds struct eckd_count *count_data; 18681da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 18691da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 18701da177e4SLinus Torvalds struct ccw1 *ccw; 18711da177e4SLinus Torvalds int cplength, datasize; 18721da177e4SLinus Torvalds int i; 18731da177e4SLinus Torvalds 18741da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 18751da177e4SLinus Torvalds 18761da177e4SLinus Torvalds cplength = 8; 18771da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 187868b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 18791da177e4SLinus Torvalds if (IS_ERR(cqr)) 18801da177e4SLinus Torvalds return cqr; 18811da177e4SLinus Torvalds ccw = cqr->cpaddr; 18821da177e4SLinus Torvalds /* Define extent for the first 3 tracks. */ 18831da177e4SLinus Torvalds define_extent(ccw++, cqr->data, 0, 2, 18841da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device); 18851da177e4SLinus Torvalds LO_data = cqr->data + sizeof(struct DE_eckd_data); 18861da177e4SLinus Torvalds /* Locate record for the first 4 records on track 0. */ 18871da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18881da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 0, 0, 4, 18891da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 18901da177e4SLinus Torvalds 18911da177e4SLinus Torvalds count_data = private->count_area; 18921da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 18931da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18941da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 18951da177e4SLinus Torvalds ccw->flags = 0; 18961da177e4SLinus Torvalds ccw->count = 8; 18971da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 18981da177e4SLinus Torvalds ccw++; 18991da177e4SLinus Torvalds count_data++; 19001da177e4SLinus Torvalds } 19011da177e4SLinus Torvalds 19021da177e4SLinus Torvalds /* Locate record for the first record on track 2. */ 19031da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 19041da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 2, 0, 1, 19051da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 19061da177e4SLinus Torvalds /* Read count ccw. */ 19071da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 19081da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 19091da177e4SLinus Torvalds ccw->flags = 0; 19101da177e4SLinus Torvalds ccw->count = 8; 19111da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 19121da177e4SLinus Torvalds 19138e09f215SStefan Weinhuber cqr->block = NULL; 19148e09f215SStefan Weinhuber cqr->startdev = device; 19158e09f215SStefan Weinhuber cqr->memdev = device; 1916eb6e199bSStefan Weinhuber cqr->retries = 255; 19171aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 19181da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 19191da177e4SLinus Torvalds return cqr; 19201da177e4SLinus Torvalds } 19211da177e4SLinus Torvalds 1922eb6e199bSStefan Weinhuber /* differentiate between 'no record found' and any other error */ 1923eb6e199bSStefan Weinhuber static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) 1924eb6e199bSStefan Weinhuber { 1925eb6e199bSStefan Weinhuber char *sense; 1926eb6e199bSStefan Weinhuber if (init_cqr->status == DASD_CQR_DONE) 1927eb6e199bSStefan Weinhuber return INIT_CQR_OK; 1928eb6e199bSStefan Weinhuber else if (init_cqr->status == DASD_CQR_NEED_ERP || 1929eb6e199bSStefan Weinhuber init_cqr->status == DASD_CQR_FAILED) { 1930eb6e199bSStefan Weinhuber sense = dasd_get_sense(&init_cqr->irb); 1931eb6e199bSStefan Weinhuber if (sense && (sense[1] & SNS1_NO_REC_FOUND)) 1932eb6e199bSStefan Weinhuber return INIT_CQR_UNFORMATTED; 1933eb6e199bSStefan Weinhuber else 1934eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 1935eb6e199bSStefan Weinhuber } else 1936eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 1937eb6e199bSStefan Weinhuber } 1938eb6e199bSStefan Weinhuber 19391da177e4SLinus Torvalds /* 19401da177e4SLinus Torvalds * This is the callback function for the init_analysis cqr. It saves 19411da177e4SLinus Torvalds * the status of the initial analysis ccw before it frees it and kicks 19421da177e4SLinus Torvalds * the device to continue the startup sequence. This will call 19431da177e4SLinus Torvalds * dasd_eckd_do_analysis again (if the devices has not been marked 19441da177e4SLinus Torvalds * for deletion in the meantime). 19451da177e4SLinus Torvalds */ 1946eb6e199bSStefan Weinhuber static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, 1947eb6e199bSStefan Weinhuber void *data) 19481da177e4SLinus Torvalds { 19491da177e4SLinus Torvalds struct dasd_eckd_private *private; 19501da177e4SLinus Torvalds struct dasd_device *device; 19511da177e4SLinus Torvalds 19528e09f215SStefan Weinhuber device = init_cqr->startdev; 19531da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 1954eb6e199bSStefan Weinhuber private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); 19551da177e4SLinus Torvalds dasd_sfree_request(init_cqr, device); 19561da177e4SLinus Torvalds dasd_kick_device(device); 19571da177e4SLinus Torvalds } 19581da177e4SLinus Torvalds 1959eb6e199bSStefan Weinhuber static int dasd_eckd_start_analysis(struct dasd_block *block) 19601da177e4SLinus Torvalds { 19611da177e4SLinus Torvalds struct dasd_ccw_req *init_cqr; 19621da177e4SLinus Torvalds 19638e09f215SStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(block->base); 19641da177e4SLinus Torvalds if (IS_ERR(init_cqr)) 19651da177e4SLinus Torvalds return PTR_ERR(init_cqr); 19661da177e4SLinus Torvalds init_cqr->callback = dasd_eckd_analysis_callback; 19671da177e4SLinus Torvalds init_cqr->callback_data = NULL; 19681da177e4SLinus Torvalds init_cqr->expires = 5*HZ; 1969eb6e199bSStefan Weinhuber /* first try without ERP, so we can later handle unformatted 1970eb6e199bSStefan Weinhuber * devices as special case 1971eb6e199bSStefan Weinhuber */ 1972eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); 1973eb6e199bSStefan Weinhuber init_cqr->retries = 0; 19741da177e4SLinus Torvalds dasd_add_request_head(init_cqr); 19751da177e4SLinus Torvalds return -EAGAIN; 19761da177e4SLinus Torvalds } 19771da177e4SLinus Torvalds 1978eb6e199bSStefan Weinhuber static int dasd_eckd_end_analysis(struct dasd_block *block) 19791da177e4SLinus Torvalds { 19808e09f215SStefan Weinhuber struct dasd_device *device; 19811da177e4SLinus Torvalds struct dasd_eckd_private *private; 19821da177e4SLinus Torvalds struct eckd_count *count_area; 19831da177e4SLinus Torvalds unsigned int sb, blk_per_trk; 19841da177e4SLinus Torvalds int status, i; 1985eb6e199bSStefan Weinhuber struct dasd_ccw_req *init_cqr; 19861da177e4SLinus Torvalds 19878e09f215SStefan Weinhuber device = block->base; 19881da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 19891da177e4SLinus Torvalds status = private->init_cqr_status; 19901da177e4SLinus Torvalds private->init_cqr_status = -1; 1991eb6e199bSStefan Weinhuber if (status == INIT_CQR_ERROR) { 1992eb6e199bSStefan Weinhuber /* try again, this time with full ERP */ 1993eb6e199bSStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(device); 1994eb6e199bSStefan Weinhuber dasd_sleep_on(init_cqr); 1995eb6e199bSStefan Weinhuber status = dasd_eckd_analysis_evaluation(init_cqr); 1996eb6e199bSStefan Weinhuber dasd_sfree_request(init_cqr, device); 1997eb6e199bSStefan Weinhuber } 1998eb6e199bSStefan Weinhuber 1999e4dbb0f2SStefan Haberland if (device->features & DASD_FEATURE_USERAW) { 2000e4dbb0f2SStefan Haberland block->bp_block = DASD_RAW_BLOCKSIZE; 2001e4dbb0f2SStefan Haberland blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; 2002e4dbb0f2SStefan Haberland block->s2b_shift = 3; 2003e4dbb0f2SStefan Haberland goto raw; 2004e4dbb0f2SStefan Haberland } 2005e4dbb0f2SStefan Haberland 2006eb6e199bSStefan Weinhuber if (status == INIT_CQR_UNFORMATTED) { 2007eb6e199bSStefan Weinhuber dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); 20081da177e4SLinus Torvalds return -EMEDIUMTYPE; 2009eb6e199bSStefan Weinhuber } else if (status == INIT_CQR_ERROR) { 2010eb6e199bSStefan Weinhuber dev_err(&device->cdev->dev, 2011eb6e199bSStefan Weinhuber "Detecting the DASD disk layout failed because " 2012eb6e199bSStefan Weinhuber "of an I/O error\n"); 2013eb6e199bSStefan Weinhuber return -EIO; 20141da177e4SLinus Torvalds } 20151da177e4SLinus Torvalds 20161da177e4SLinus Torvalds private->uses_cdl = 1; 20171da177e4SLinus Torvalds /* Check Track 0 for Compatible Disk Layout */ 20181da177e4SLinus Torvalds count_area = NULL; 20191da177e4SLinus Torvalds for (i = 0; i < 3; i++) { 20201da177e4SLinus Torvalds if (private->count_area[i].kl != 4 || 20213bc9fef9SStefan Haberland private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 || 20223bc9fef9SStefan Haberland private->count_area[i].cyl != 0 || 20233bc9fef9SStefan Haberland private->count_area[i].head != count_area_head[i] || 20243bc9fef9SStefan Haberland private->count_area[i].record != count_area_rec[i]) { 20251da177e4SLinus Torvalds private->uses_cdl = 0; 20261da177e4SLinus Torvalds break; 20271da177e4SLinus Torvalds } 20281da177e4SLinus Torvalds } 20291da177e4SLinus Torvalds if (i == 3) 20301da177e4SLinus Torvalds count_area = &private->count_area[4]; 20311da177e4SLinus Torvalds 20321da177e4SLinus Torvalds if (private->uses_cdl == 0) { 20331da177e4SLinus Torvalds for (i = 0; i < 5; i++) { 20341da177e4SLinus Torvalds if ((private->count_area[i].kl != 0) || 20351da177e4SLinus Torvalds (private->count_area[i].dl != 20363bc9fef9SStefan Haberland private->count_area[0].dl) || 20373bc9fef9SStefan Haberland private->count_area[i].cyl != 0 || 20383bc9fef9SStefan Haberland private->count_area[i].head != count_area_head[i] || 20393bc9fef9SStefan Haberland private->count_area[i].record != count_area_rec[i]) 20401da177e4SLinus Torvalds break; 20411da177e4SLinus Torvalds } 20421da177e4SLinus Torvalds if (i == 5) 20431da177e4SLinus Torvalds count_area = &private->count_area[0]; 20441da177e4SLinus Torvalds } else { 20451da177e4SLinus Torvalds if (private->count_area[3].record == 1) 2046fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 2047fc19f381SStefan Haberland "Track 0 has no records following the VTOC\n"); 20481da177e4SLinus Torvalds } 2049e4dbb0f2SStefan Haberland 20501da177e4SLinus Torvalds if (count_area != NULL && count_area->kl == 0) { 20511da177e4SLinus Torvalds /* we found notthing violating our disk layout */ 20521da177e4SLinus Torvalds if (dasd_check_blocksize(count_area->dl) == 0) 20538e09f215SStefan Weinhuber block->bp_block = count_area->dl; 20541da177e4SLinus Torvalds } 20558e09f215SStefan Weinhuber if (block->bp_block == 0) { 2056fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 2057fc19f381SStefan Haberland "The disk layout of the DASD is not supported\n"); 20581da177e4SLinus Torvalds return -EMEDIUMTYPE; 20591da177e4SLinus Torvalds } 20608e09f215SStefan Weinhuber block->s2b_shift = 0; /* bits to shift 512 to get a block */ 20618e09f215SStefan Weinhuber for (sb = 512; sb < block->bp_block; sb = sb << 1) 20628e09f215SStefan Weinhuber block->s2b_shift++; 20631da177e4SLinus Torvalds 20648e09f215SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 2065e4dbb0f2SStefan Haberland 2066e4dbb0f2SStefan Haberland raw: 2067b44b0ab3SStefan Weinhuber block->blocks = (private->real_cyl * 20681da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 20691da177e4SLinus Torvalds blk_per_trk); 20701da177e4SLinus Torvalds 2071fc19f381SStefan Haberland dev_info(&device->cdev->dev, 2072fc19f381SStefan Haberland "DASD with %d KB/block, %d KB total size, %d KB/track, " 2073fc19f381SStefan Haberland "%s\n", (block->bp_block >> 10), 2074b44b0ab3SStefan Weinhuber ((private->real_cyl * 20751da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 20768e09f215SStefan Weinhuber blk_per_trk * (block->bp_block >> 9)) >> 1), 20778e09f215SStefan Weinhuber ((blk_per_trk * block->bp_block) >> 10), 20781da177e4SLinus Torvalds private->uses_cdl ? 20791da177e4SLinus Torvalds "compatible disk layout" : "linux disk layout"); 20801da177e4SLinus Torvalds 20811da177e4SLinus Torvalds return 0; 20821da177e4SLinus Torvalds } 20831da177e4SLinus Torvalds 20848e09f215SStefan Weinhuber static int dasd_eckd_do_analysis(struct dasd_block *block) 20851da177e4SLinus Torvalds { 20861da177e4SLinus Torvalds struct dasd_eckd_private *private; 20871da177e4SLinus Torvalds 20888e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 20891da177e4SLinus Torvalds if (private->init_cqr_status < 0) 20908e09f215SStefan Weinhuber return dasd_eckd_start_analysis(block); 20911da177e4SLinus Torvalds else 20928e09f215SStefan Weinhuber return dasd_eckd_end_analysis(block); 20931da177e4SLinus Torvalds } 20941da177e4SLinus Torvalds 2095d42e1712SStefan Haberland static int dasd_eckd_basic_to_ready(struct dasd_device *device) 20968e09f215SStefan Weinhuber { 20978e09f215SStefan Weinhuber return dasd_alias_add_device(device); 20988e09f215SStefan Weinhuber }; 20998e09f215SStefan Weinhuber 21008e09f215SStefan Weinhuber static int dasd_eckd_online_to_ready(struct dasd_device *device) 21018e09f215SStefan Weinhuber { 2102501183f2SStefan Haberland cancel_work_sync(&device->reload_device); 210325e2cf1cSStefan Haberland cancel_work_sync(&device->kick_validate); 2104d42e1712SStefan Haberland return 0; 2105d42e1712SStefan Haberland }; 2106d42e1712SStefan Haberland 2107daa991bfSStefan Haberland static int dasd_eckd_basic_to_known(struct dasd_device *device) 2108d42e1712SStefan Haberland { 21098e09f215SStefan Weinhuber return dasd_alias_remove_device(device); 21108e09f215SStefan Weinhuber }; 21118e09f215SStefan Weinhuber 21121da177e4SLinus Torvalds static int 21138e09f215SStefan Weinhuber dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 21141da177e4SLinus Torvalds { 21151da177e4SLinus Torvalds struct dasd_eckd_private *private; 21161da177e4SLinus Torvalds 21178e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 21188e09f215SStefan Weinhuber if (dasd_check_blocksize(block->bp_block) == 0) { 21191da177e4SLinus Torvalds geo->sectors = recs_per_track(&private->rdc_data, 21208e09f215SStefan Weinhuber 0, block->bp_block); 21211da177e4SLinus Torvalds } 21221da177e4SLinus Torvalds geo->cylinders = private->rdc_data.no_cyl; 21231da177e4SLinus Torvalds geo->heads = private->rdc_data.trk_per_cyl; 21241da177e4SLinus Torvalds return 0; 21251da177e4SLinus Torvalds } 21261da177e4SLinus Torvalds 21271da177e4SLinus Torvalds static struct dasd_ccw_req * 2128d42e1712SStefan Haberland dasd_eckd_build_format(struct dasd_device *base, 212929b8dd9dSStefan Haberland struct format_data_t *fdata, 2130a94fa154SStefan Haberland int enable_pav) 21311da177e4SLinus Torvalds { 2132d42e1712SStefan Haberland struct dasd_eckd_private *base_priv; 2133d42e1712SStefan Haberland struct dasd_eckd_private *start_priv; 213429b8dd9dSStefan Haberland struct dasd_device *startdev = NULL; 21351da177e4SLinus Torvalds struct dasd_ccw_req *fcp; 21361da177e4SLinus Torvalds struct eckd_count *ect; 2137d42e1712SStefan Haberland struct ch_t address; 21381da177e4SLinus Torvalds struct ccw1 *ccw; 21391da177e4SLinus Torvalds void *data; 2140b44b0ab3SStefan Weinhuber int rpt; 21411da177e4SLinus Torvalds int cplength, datasize; 2142d42e1712SStefan Haberland int i, j; 2143f9a28f7bSJean-Baptiste Joret int intensity = 0; 2144f9a28f7bSJean-Baptiste Joret int r0_perm; 2145d42e1712SStefan Haberland int nr_tracks; 214618d6624eSStefan Haberland int use_prefix; 21471da177e4SLinus Torvalds 2148a94fa154SStefan Haberland if (enable_pav) 2149d42e1712SStefan Haberland startdev = dasd_alias_get_start_dev(base); 215029b8dd9dSStefan Haberland 2151d42e1712SStefan Haberland if (!startdev) 2152d42e1712SStefan Haberland startdev = base; 21531da177e4SLinus Torvalds 2154d42e1712SStefan Haberland start_priv = (struct dasd_eckd_private *) startdev->private; 2155d42e1712SStefan Haberland base_priv = (struct dasd_eckd_private *) base->private; 2156d42e1712SStefan Haberland 2157d42e1712SStefan Haberland rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize); 2158d42e1712SStefan Haberland 2159d42e1712SStefan Haberland nr_tracks = fdata->stop_unit - fdata->start_unit + 1; 21601da177e4SLinus Torvalds 21611da177e4SLinus Torvalds /* 21621da177e4SLinus Torvalds * fdata->intensity is a bit string that tells us what to do: 21631da177e4SLinus Torvalds * Bit 0: write record zero 21641da177e4SLinus Torvalds * Bit 1: write home address, currently not supported 21651da177e4SLinus Torvalds * Bit 2: invalidate tracks 21661da177e4SLinus Torvalds * Bit 3: use OS/390 compatible disk layout (cdl) 2167f9a28f7bSJean-Baptiste Joret * Bit 4: do not allow storage subsystem to modify record zero 21681da177e4SLinus Torvalds * Only some bit combinations do make sense. 21691da177e4SLinus Torvalds */ 2170f9a28f7bSJean-Baptiste Joret if (fdata->intensity & 0x10) { 2171f9a28f7bSJean-Baptiste Joret r0_perm = 0; 2172f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity & ~0x10; 2173f9a28f7bSJean-Baptiste Joret } else { 2174f9a28f7bSJean-Baptiste Joret r0_perm = 1; 2175f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity; 2176f9a28f7bSJean-Baptiste Joret } 2177d42e1712SStefan Haberland 217818d6624eSStefan Haberland use_prefix = base_priv->features.feature[8] & 0x01; 217918d6624eSStefan Haberland 2180f9a28f7bSJean-Baptiste Joret switch (intensity) { 21811da177e4SLinus Torvalds case 0x00: /* Normal format */ 21821da177e4SLinus Torvalds case 0x08: /* Normal format, use cdl. */ 2183d42e1712SStefan Haberland cplength = 2 + (rpt*nr_tracks); 218418d6624eSStefan Haberland if (use_prefix) 2185d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 21861da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 2187d42e1712SStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 218818d6624eSStefan Haberland else 218918d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 219018d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 219118d6624eSStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 21921da177e4SLinus Torvalds break; 21931da177e4SLinus Torvalds case 0x01: /* Write record zero and format track. */ 21941da177e4SLinus Torvalds case 0x09: /* Write record zero and format track, use cdl. */ 2195d42e1712SStefan Haberland cplength = 2 + rpt * nr_tracks; 219618d6624eSStefan Haberland if (use_prefix) 2197d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 21981da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 21991da177e4SLinus Torvalds sizeof(struct eckd_count) + 2200d42e1712SStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 220118d6624eSStefan Haberland else 220218d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 220318d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 220418d6624eSStefan Haberland sizeof(struct eckd_count) + 220518d6624eSStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 22061da177e4SLinus Torvalds break; 22071da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 22081da177e4SLinus Torvalds case 0x0c: /* Invalidate track, use cdl. */ 22091da177e4SLinus Torvalds cplength = 3; 221018d6624eSStefan Haberland if (use_prefix) 2211d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 22121da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 22131da177e4SLinus Torvalds sizeof(struct eckd_count); 221418d6624eSStefan Haberland else 221518d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 221618d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 221718d6624eSStefan Haberland sizeof(struct eckd_count); 22181da177e4SLinus Torvalds break; 22191da177e4SLinus Torvalds default: 2220d42e1712SStefan Haberland dev_warn(&startdev->cdev->dev, 2221d42e1712SStefan Haberland "An I/O control call used incorrect flags 0x%x\n", 2222d42e1712SStefan Haberland fdata->intensity); 22231da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 22241da177e4SLinus Torvalds } 22251da177e4SLinus Torvalds /* Allocate the format ccw request. */ 2226d42e1712SStefan Haberland fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 2227d42e1712SStefan Haberland datasize, startdev); 22281da177e4SLinus Torvalds if (IS_ERR(fcp)) 22291da177e4SLinus Torvalds return fcp; 22301da177e4SLinus Torvalds 2231d42e1712SStefan Haberland start_priv->count++; 22321da177e4SLinus Torvalds data = fcp->data; 22331da177e4SLinus Torvalds ccw = fcp->cpaddr; 22341da177e4SLinus Torvalds 2235f9a28f7bSJean-Baptiste Joret switch (intensity & ~0x08) { 22361da177e4SLinus Torvalds case 0x00: /* Normal format. */ 223718d6624eSStefan Haberland if (use_prefix) { 2238d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2239d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 2240d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2241f9a28f7bSJean-Baptiste Joret /* grant subsystem permission to format R0 */ 2242f9a28f7bSJean-Baptiste Joret if (r0_perm) 2243d42e1712SStefan Haberland ((struct PFX_eckd_data *)data) 2244d42e1712SStefan Haberland ->define_extent.ga_extended |= 0x04; 2245d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 224618d6624eSStefan Haberland } else { 224718d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 224818d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 224918d6624eSStefan Haberland DASD_ECKD_CCW_WRITE_CKD, startdev); 225018d6624eSStefan Haberland /* grant subsystem permission to format R0 */ 225118d6624eSStefan Haberland if (r0_perm) 225218d6624eSStefan Haberland ((struct DE_eckd_data *) data) 225318d6624eSStefan Haberland ->ga_extended |= 0x04; 225418d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 225518d6624eSStefan Haberland } 22561da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 22571da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 2258d42e1712SStefan Haberland fdata->start_unit, 0, rpt*nr_tracks, 2259d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, 22601da177e4SLinus Torvalds fdata->blksize); 22611da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 22621da177e4SLinus Torvalds break; 22631da177e4SLinus Torvalds case 0x01: /* Write record zero + format track. */ 226418d6624eSStefan Haberland if (use_prefix) { 2265d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2266d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 22671da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, 2268d42e1712SStefan Haberland base, startdev); 2269d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 227018d6624eSStefan Haberland } else { 227118d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 227218d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 227318d6624eSStefan Haberland DASD_ECKD_CCW_WRITE_RECORD_ZERO, startdev); 227418d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 227518d6624eSStefan Haberland } 22761da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 22771da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 2278d42e1712SStefan Haberland fdata->start_unit, 0, rpt * nr_tracks + 1, 2279d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_RECORD_ZERO, base, 2280d42e1712SStefan Haberland base->block->bp_block); 22811da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 22821da177e4SLinus Torvalds break; 22831da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 228418d6624eSStefan Haberland if (use_prefix) { 2285d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2286d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 2287d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2288d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 228918d6624eSStefan Haberland } else { 229018d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 229118d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 229218d6624eSStefan Haberland DASD_ECKD_CCW_WRITE_CKD, startdev); 229318d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 229418d6624eSStefan Haberland } 22951da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 22961da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 22971da177e4SLinus Torvalds fdata->start_unit, 0, 1, 2298d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, 8); 22991da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 23001da177e4SLinus Torvalds break; 23011da177e4SLinus Torvalds } 2302d42e1712SStefan Haberland 2303d42e1712SStefan Haberland for (j = 0; j < nr_tracks; j++) { 2304d42e1712SStefan Haberland /* calculate cylinder and head for the current track */ 2305d42e1712SStefan Haberland set_ch_t(&address, 2306d42e1712SStefan Haberland (fdata->start_unit + j) / 2307d42e1712SStefan Haberland base_priv->rdc_data.trk_per_cyl, 2308d42e1712SStefan Haberland (fdata->start_unit + j) % 2309d42e1712SStefan Haberland base_priv->rdc_data.trk_per_cyl); 2310f9a28f7bSJean-Baptiste Joret if (intensity & 0x01) { /* write record zero */ 23111da177e4SLinus Torvalds ect = (struct eckd_count *) data; 23121da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2313b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2314b44b0ab3SStefan Weinhuber ect->head = address.head; 23151da177e4SLinus Torvalds ect->record = 0; 23161da177e4SLinus Torvalds ect->kl = 0; 23171da177e4SLinus Torvalds ect->dl = 8; 23181da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 23191da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 23201da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 23211da177e4SLinus Torvalds ccw->count = 8; 23221da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 23231da177e4SLinus Torvalds ccw++; 23241da177e4SLinus Torvalds } 2325f9a28f7bSJean-Baptiste Joret if ((intensity & ~0x08) & 0x04) { /* erase track */ 23261da177e4SLinus Torvalds ect = (struct eckd_count *) data; 23271da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2328b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2329b44b0ab3SStefan Weinhuber ect->head = address.head; 23301da177e4SLinus Torvalds ect->record = 1; 23311da177e4SLinus Torvalds ect->kl = 0; 23321da177e4SLinus Torvalds ect->dl = 0; 23331da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 23341da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 23351da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 23361da177e4SLinus Torvalds ccw->count = 8; 23371da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 23381da177e4SLinus Torvalds } else { /* write remaining records */ 23391da177e4SLinus Torvalds for (i = 0; i < rpt; i++) { 23401da177e4SLinus Torvalds ect = (struct eckd_count *) data; 23411da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2342b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2343b44b0ab3SStefan Weinhuber ect->head = address.head; 23441da177e4SLinus Torvalds ect->record = i + 1; 23451da177e4SLinus Torvalds ect->kl = 0; 23461da177e4SLinus Torvalds ect->dl = fdata->blksize; 2347d42e1712SStefan Haberland /* 2348d42e1712SStefan Haberland * Check for special tracks 0-1 2349d42e1712SStefan Haberland * when formatting CDL 2350d42e1712SStefan Haberland */ 2351f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 235246d1c03cSJan Höppner address.cyl == 0 && address.head == 0) { 23531da177e4SLinus Torvalds if (i < 3) { 23541da177e4SLinus Torvalds ect->kl = 4; 23551da177e4SLinus Torvalds ect->dl = sizes_trk0[i] - 4; 23561da177e4SLinus Torvalds } 23571da177e4SLinus Torvalds } 2358f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 235946d1c03cSJan Höppner address.cyl == 0 && address.head == 1) { 23601da177e4SLinus Torvalds ect->kl = 44; 23611da177e4SLinus Torvalds ect->dl = LABEL_SIZE - 44; 23621da177e4SLinus Torvalds } 23631da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 2364d42e1712SStefan Haberland if (i != 0 || j == 0) 2365d42e1712SStefan Haberland ccw->cmd_code = 2366d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD; 2367d42e1712SStefan Haberland else 2368d42e1712SStefan Haberland ccw->cmd_code = 2369d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD_MT; 23701da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 23711da177e4SLinus Torvalds ccw->count = 8; 23721da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 23731da177e4SLinus Torvalds ccw++; 23741da177e4SLinus Torvalds } 23751da177e4SLinus Torvalds } 2376d42e1712SStefan Haberland } 2377d42e1712SStefan Haberland 2378d42e1712SStefan Haberland fcp->startdev = startdev; 2379d42e1712SStefan Haberland fcp->memdev = startdev; 238029b8dd9dSStefan Haberland fcp->basedev = base; 2381eb6e199bSStefan Weinhuber fcp->retries = 256; 2382d42e1712SStefan Haberland fcp->expires = startdev->default_expires * HZ; 23831aae0560SHeiko Carstens fcp->buildclk = get_tod_clock(); 23841da177e4SLinus Torvalds fcp->status = DASD_CQR_FILLED; 2385d42e1712SStefan Haberland 23861da177e4SLinus Torvalds return fcp; 23871da177e4SLinus Torvalds } 23881da177e4SLinus Torvalds 2389d42e1712SStefan Haberland static int 2390d42e1712SStefan Haberland dasd_eckd_format_device(struct dasd_device *base, 239129b8dd9dSStefan Haberland struct format_data_t *fdata, 2392a94fa154SStefan Haberland int enable_pav) 2393d42e1712SStefan Haberland { 2394d42e1712SStefan Haberland struct dasd_ccw_req *cqr, *n; 2395d42e1712SStefan Haberland struct dasd_eckd_private *private; 2396d42e1712SStefan Haberland struct list_head format_queue; 2397d42e1712SStefan Haberland struct dasd_device *device; 239846d1c03cSJan Höppner int old_start, old_stop, format_step; 239946d1c03cSJan Höppner int step, retry; 240046d1c03cSJan Höppner int rc = 0; 2401d42e1712SStefan Haberland 2402d42e1712SStefan Haberland private = (struct dasd_eckd_private *) base->private; 2403d42e1712SStefan Haberland 2404d42e1712SStefan Haberland /* Sanity checks. */ 2405d42e1712SStefan Haberland if (fdata->start_unit >= 2406d42e1712SStefan Haberland (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2407d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2408d42e1712SStefan Haberland "Start track number %u used in formatting is too big\n", 2409d42e1712SStefan Haberland fdata->start_unit); 2410d42e1712SStefan Haberland return -EINVAL; 2411d42e1712SStefan Haberland } 2412d42e1712SStefan Haberland if (fdata->stop_unit >= 2413d42e1712SStefan Haberland (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2414d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2415d42e1712SStefan Haberland "Stop track number %u used in formatting is too big\n", 2416d42e1712SStefan Haberland fdata->stop_unit); 2417d42e1712SStefan Haberland return -EINVAL; 2418d42e1712SStefan Haberland } 2419d42e1712SStefan Haberland if (fdata->start_unit > fdata->stop_unit) { 2420d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2421d42e1712SStefan Haberland "Start track %u used in formatting exceeds end track\n", 2422d42e1712SStefan Haberland fdata->start_unit); 2423d42e1712SStefan Haberland return -EINVAL; 2424d42e1712SStefan Haberland } 2425d42e1712SStefan Haberland if (dasd_check_blocksize(fdata->blksize) != 0) { 2426d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2427d42e1712SStefan Haberland "The DASD cannot be formatted with block size %u\n", 2428d42e1712SStefan Haberland fdata->blksize); 2429d42e1712SStefan Haberland return -EINVAL; 2430d42e1712SStefan Haberland } 2431d42e1712SStefan Haberland 2432d42e1712SStefan Haberland INIT_LIST_HEAD(&format_queue); 2433d42e1712SStefan Haberland 243446d1c03cSJan Höppner old_start = fdata->start_unit; 243529b8dd9dSStefan Haberland old_stop = fdata->stop_unit; 2436d42e1712SStefan Haberland 243746d1c03cSJan Höppner format_step = DASD_CQR_MAX_CCW / recs_per_track(&private->rdc_data, 0, 2438d42e1712SStefan Haberland fdata->blksize); 243946d1c03cSJan Höppner do { 244046d1c03cSJan Höppner retry = 0; 2441d42e1712SStefan Haberland while (fdata->start_unit <= old_stop) { 2442d42e1712SStefan Haberland step = fdata->stop_unit - fdata->start_unit + 1; 244346d1c03cSJan Höppner if (step > format_step) { 244446d1c03cSJan Höppner fdata->stop_unit = 244546d1c03cSJan Höppner fdata->start_unit + format_step - 1; 244646d1c03cSJan Höppner } 2447d42e1712SStefan Haberland 2448a94fa154SStefan Haberland cqr = dasd_eckd_build_format(base, fdata, enable_pav); 2449d42e1712SStefan Haberland if (IS_ERR(cqr)) { 245046d1c03cSJan Höppner rc = PTR_ERR(cqr); 245146d1c03cSJan Höppner if (rc == -ENOMEM) { 245246d1c03cSJan Höppner if (list_empty(&format_queue)) 245346d1c03cSJan Höppner goto out; 2454d42e1712SStefan Haberland /* 245546d1c03cSJan Höppner * not enough memory available, start 245646d1c03cSJan Höppner * requests retry after first requests 245746d1c03cSJan Höppner * were finished 2458d42e1712SStefan Haberland */ 245946d1c03cSJan Höppner retry = 1; 246046d1c03cSJan Höppner break; 2461d42e1712SStefan Haberland } 246246d1c03cSJan Höppner goto out_err; 246346d1c03cSJan Höppner } 246446d1c03cSJan Höppner list_add_tail(&cqr->blocklist, &format_queue); 2465d42e1712SStefan Haberland 2466d42e1712SStefan Haberland fdata->start_unit = fdata->stop_unit + 1; 2467d42e1712SStefan Haberland fdata->stop_unit = old_stop; 2468d42e1712SStefan Haberland } 2469d42e1712SStefan Haberland 247046d1c03cSJan Höppner rc = dasd_sleep_on_queue(&format_queue); 2471d42e1712SStefan Haberland 247246d1c03cSJan Höppner out_err: 2473d42e1712SStefan Haberland list_for_each_entry_safe(cqr, n, &format_queue, blocklist) { 2474d42e1712SStefan Haberland device = cqr->startdev; 2475d42e1712SStefan Haberland private = (struct dasd_eckd_private *) device->private; 2476d42e1712SStefan Haberland if (cqr->status == DASD_CQR_FAILED) 2477d42e1712SStefan Haberland rc = -EIO; 2478d42e1712SStefan Haberland list_del_init(&cqr->blocklist); 2479d42e1712SStefan Haberland dasd_sfree_request(cqr, device); 2480d42e1712SStefan Haberland private->count--; 2481d42e1712SStefan Haberland } 2482d42e1712SStefan Haberland 248346d1c03cSJan Höppner if (rc) 248446d1c03cSJan Höppner goto out; 248529b8dd9dSStefan Haberland 248646d1c03cSJan Höppner } while (retry); 248746d1c03cSJan Höppner 248846d1c03cSJan Höppner out: 248946d1c03cSJan Höppner fdata->start_unit = old_start; 249046d1c03cSJan Höppner fdata->stop_unit = old_stop; 2491d42e1712SStefan Haberland 2492d42e1712SStefan Haberland return rc; 2493d42e1712SStefan Haberland } 2494d42e1712SStefan Haberland 24958e09f215SStefan Weinhuber static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 24961da177e4SLinus Torvalds { 2497a2ace466SHannes Reinecke if (cqr->retries < 0) { 2498a2ace466SHannes Reinecke cqr->status = DASD_CQR_FAILED; 2499a2ace466SHannes Reinecke return; 2500a2ace466SHannes Reinecke } 25018e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 25028e09f215SStefan Weinhuber if (cqr->block && (cqr->startdev != cqr->block->base)) { 25038e09f215SStefan Weinhuber dasd_eckd_reset_ccw_to_base_io(cqr); 25048e09f215SStefan Weinhuber cqr->startdev = cqr->block->base; 2505a4d26c6aSStefan Weinhuber cqr->lpm = cqr->block->base->path_data.opm; 25061da177e4SLinus Torvalds } 25078e09f215SStefan Weinhuber }; 25081da177e4SLinus Torvalds 25091da177e4SLinus Torvalds static dasd_erp_fn_t 25101da177e4SLinus Torvalds dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 25111da177e4SLinus Torvalds { 25128e09f215SStefan Weinhuber struct dasd_device *device = (struct dasd_device *) cqr->startdev; 25131da177e4SLinus Torvalds struct ccw_device *cdev = device->cdev; 25141da177e4SLinus Torvalds 25151da177e4SLinus Torvalds switch (cdev->id.cu_type) { 25161da177e4SLinus Torvalds case 0x3990: 25171da177e4SLinus Torvalds case 0x2105: 25181da177e4SLinus Torvalds case 0x2107: 25191da177e4SLinus Torvalds case 0x1750: 25201da177e4SLinus Torvalds return dasd_3990_erp_action; 25211da177e4SLinus Torvalds case 0x9343: 25221da177e4SLinus Torvalds case 0x3880: 25231da177e4SLinus Torvalds default: 25241da177e4SLinus Torvalds return dasd_default_erp_action; 25251da177e4SLinus Torvalds } 25261da177e4SLinus Torvalds } 25271da177e4SLinus Torvalds 25281da177e4SLinus Torvalds static dasd_erp_fn_t 25291da177e4SLinus Torvalds dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 25301da177e4SLinus Torvalds { 25311da177e4SLinus Torvalds return dasd_default_erp_postaction; 25321da177e4SLinus Torvalds } 25331da177e4SLinus Torvalds 25345a27e60dSStefan Weinhuber static void dasd_eckd_check_for_device_change(struct dasd_device *device, 25355a27e60dSStefan Weinhuber struct dasd_ccw_req *cqr, 25368e09f215SStefan Weinhuber struct irb *irb) 25378e09f215SStefan Weinhuber { 25388e09f215SStefan Weinhuber char mask; 2539f3eb5384SStefan Weinhuber char *sense = NULL; 2540501183f2SStefan Haberland struct dasd_eckd_private *private; 25418e09f215SStefan Weinhuber 2542501183f2SStefan Haberland private = (struct dasd_eckd_private *) device->private; 25438e09f215SStefan Weinhuber /* first of all check for state change pending interrupt */ 25448e09f215SStefan Weinhuber mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 2545f3eb5384SStefan Weinhuber if ((scsw_dstat(&irb->scsw) & mask) == mask) { 2546c8d1c0ffSStefan Haberland /* 2547c8d1c0ffSStefan Haberland * for alias only, not in offline processing 2548c8d1c0ffSStefan Haberland * and only if not suspended 2549c8d1c0ffSStefan Haberland */ 2550501183f2SStefan Haberland if (!device->block && private->lcu && 255125e2cf1cSStefan Haberland device->state == DASD_STATE_ONLINE && 2552c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_OFFLINE, &device->flags) && 2553c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 2554501183f2SStefan Haberland /* 2555501183f2SStefan Haberland * the state change could be caused by an alias 2556501183f2SStefan Haberland * reassignment remove device from alias handling 2557501183f2SStefan Haberland * to prevent new requests from being scheduled on 2558501183f2SStefan Haberland * the wrong alias device 2559501183f2SStefan Haberland */ 2560501183f2SStefan Haberland dasd_alias_remove_device(device); 2561501183f2SStefan Haberland 2562501183f2SStefan Haberland /* schedule worker to reload device */ 2563501183f2SStefan Haberland dasd_reload_device(device); 2564501183f2SStefan Haberland } 25658e09f215SStefan Weinhuber dasd_generic_handle_state_change(device); 25668e09f215SStefan Weinhuber return; 25678e09f215SStefan Weinhuber } 25688e09f215SStefan Weinhuber 2569a5a0061fSStefan Weinhuber sense = dasd_get_sense(irb); 25705a27e60dSStefan Weinhuber if (!sense) 25715a27e60dSStefan Weinhuber return; 25725a27e60dSStefan Weinhuber 25735a27e60dSStefan Weinhuber /* summary unit check */ 2574c7a29e56SStefan Weinhuber if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) && 2575a5a0061fSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { 25768e09f215SStefan Weinhuber dasd_alias_handle_summary_unit_check(device, irb); 25778e09f215SStefan Weinhuber return; 25788e09f215SStefan Weinhuber } 25798e09f215SStefan Weinhuber 2580f60c768cSStefan Haberland /* service information message SIM */ 25815a27e60dSStefan Weinhuber if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && 2582f3eb5384SStefan Weinhuber ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 2583f3eb5384SStefan Weinhuber dasd_3990_erp_handle_sim(device, sense); 2584f60c768cSStefan Haberland return; 2585f60c768cSStefan Haberland } 2586f60c768cSStefan Haberland 25875a27e60dSStefan Weinhuber /* loss of device reservation is handled via base devices only 25885a27e60dSStefan Weinhuber * as alias devices may be used with several bases 25895a27e60dSStefan Weinhuber */ 2590c7a29e56SStefan Weinhuber if (device->block && (sense[27] & DASD_SENSE_BIT_0) && 2591c7a29e56SStefan Weinhuber (sense[7] == 0x3F) && 25925a27e60dSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && 25935a27e60dSStefan Weinhuber test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { 25945a27e60dSStefan Weinhuber if (device->features & DASD_FEATURE_FAILONSLCK) 25955a27e60dSStefan Weinhuber set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); 25965a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 25975a27e60dSStefan Weinhuber dev_err(&device->cdev->dev, 25985a27e60dSStefan Weinhuber "The device reservation was lost\n"); 2599ada3df91SStefan Haberland } 26005a27e60dSStefan Weinhuber } 2601f3eb5384SStefan Weinhuber 2602f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( 2603f3eb5384SStefan Weinhuber struct dasd_device *startdev, 26048e09f215SStefan Weinhuber struct dasd_block *block, 2605f3eb5384SStefan Weinhuber struct request *req, 2606f3eb5384SStefan Weinhuber sector_t first_rec, 2607f3eb5384SStefan Weinhuber sector_t last_rec, 2608f3eb5384SStefan Weinhuber sector_t first_trk, 2609f3eb5384SStefan Weinhuber sector_t last_trk, 2610f3eb5384SStefan Weinhuber unsigned int first_offs, 2611f3eb5384SStefan Weinhuber unsigned int last_offs, 2612f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 2613f3eb5384SStefan Weinhuber unsigned int blksize) 26141da177e4SLinus Torvalds { 26151da177e4SLinus Torvalds struct dasd_eckd_private *private; 26161da177e4SLinus Torvalds unsigned long *idaws; 26171da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 26181da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 26191da177e4SLinus Torvalds struct ccw1 *ccw; 26205705f702SNeilBrown struct req_iterator iter; 26217988613bSKent Overstreet struct bio_vec bv; 26221da177e4SLinus Torvalds char *dst; 2623f3eb5384SStefan Weinhuber unsigned int off; 26241da177e4SLinus Torvalds int count, cidaw, cplength, datasize; 2625f3eb5384SStefan Weinhuber sector_t recid; 26261da177e4SLinus Torvalds unsigned char cmd, rcmd; 26278e09f215SStefan Weinhuber int use_prefix; 26288e09f215SStefan Weinhuber struct dasd_device *basedev; 26291da177e4SLinus Torvalds 26308e09f215SStefan Weinhuber basedev = block->base; 26318e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 26321da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 26331da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_READ_MT; 26341da177e4SLinus Torvalds else if (rq_data_dir(req) == WRITE) 26351da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_WRITE_MT; 26361da177e4SLinus Torvalds else 26371da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 2638f3eb5384SStefan Weinhuber 26391da177e4SLinus Torvalds /* Check struct bio and count the number of blocks for the request. */ 26401da177e4SLinus Torvalds count = 0; 26411da177e4SLinus Torvalds cidaw = 0; 26425705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 26437988613bSKent Overstreet if (bv.bv_len & (blksize - 1)) 26441da177e4SLinus Torvalds /* Eckd can only do full blocks. */ 26451da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 26467988613bSKent Overstreet count += bv.bv_len >> (block->s2b_shift + 9); 26477988613bSKent Overstreet if (idal_is_needed (page_address(bv.bv_page), bv.bv_len)) 26487988613bSKent Overstreet cidaw += bv.bv_len >> (block->s2b_shift + 9); 26491da177e4SLinus Torvalds } 26501da177e4SLinus Torvalds /* Paranoia. */ 26511da177e4SLinus Torvalds if (count != last_rec - first_rec + 1) 26521da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 26538e09f215SStefan Weinhuber 26548e09f215SStefan Weinhuber /* use the prefix command if available */ 26558e09f215SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 26568e09f215SStefan Weinhuber if (use_prefix) { 26578e09f215SStefan Weinhuber /* 1x prefix + number of blocks */ 26588e09f215SStefan Weinhuber cplength = 2 + count; 26598e09f215SStefan Weinhuber /* 1x prefix + cidaws*sizeof(long) */ 26608e09f215SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 26618e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 26628e09f215SStefan Weinhuber cidaw * sizeof(unsigned long); 26638e09f215SStefan Weinhuber } else { 26641da177e4SLinus Torvalds /* 1x define extent + 1x locate record + number of blocks */ 26651da177e4SLinus Torvalds cplength = 2 + count; 26661da177e4SLinus Torvalds /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 26678e09f215SStefan Weinhuber datasize = sizeof(struct DE_eckd_data) + 26688e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 26691da177e4SLinus Torvalds cidaw * sizeof(unsigned long); 26708e09f215SStefan Weinhuber } 26711da177e4SLinus Torvalds /* Find out the number of additional locate record ccws for cdl. */ 26721da177e4SLinus Torvalds if (private->uses_cdl && first_rec < 2*blk_per_trk) { 26731da177e4SLinus Torvalds if (last_rec >= 2*blk_per_trk) 26741da177e4SLinus Torvalds count = 2*blk_per_trk - first_rec; 26751da177e4SLinus Torvalds cplength += count; 26761da177e4SLinus Torvalds datasize += count*sizeof(struct LO_eckd_data); 26771da177e4SLinus Torvalds } 26781da177e4SLinus Torvalds /* Allocate the ccw request. */ 267968b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 268068b781feSStefan Haberland startdev); 26811da177e4SLinus Torvalds if (IS_ERR(cqr)) 26821da177e4SLinus Torvalds return cqr; 26831da177e4SLinus Torvalds ccw = cqr->cpaddr; 26848e09f215SStefan Weinhuber /* First ccw is define extent or prefix. */ 26858e09f215SStefan Weinhuber if (use_prefix) { 26868e09f215SStefan Weinhuber if (prefix(ccw++, cqr->data, first_trk, 26878e09f215SStefan Weinhuber last_trk, cmd, basedev, startdev) == -EAGAIN) { 26888e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 26898e09f215SStefan Weinhuber * Try again later. 26908e09f215SStefan Weinhuber */ 26918e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2692d54853efSMartin Schwidefsky return ERR_PTR(-EAGAIN); 2693d54853efSMartin Schwidefsky } 26948e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 26958e09f215SStefan Weinhuber sizeof(struct PFX_eckd_data)); 26968e09f215SStefan Weinhuber } else { 26978e09f215SStefan Weinhuber if (define_extent(ccw++, cqr->data, first_trk, 2698b38f27e8SStefan Haberland last_trk, cmd, basedev) == -EAGAIN) { 26998e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 27008e09f215SStefan Weinhuber * Try again later. 27018e09f215SStefan Weinhuber */ 27028e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 27038e09f215SStefan Weinhuber return ERR_PTR(-EAGAIN); 27048e09f215SStefan Weinhuber } 27058e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 27068e09f215SStefan Weinhuber sizeof(struct DE_eckd_data)); 27078e09f215SStefan Weinhuber } 27081da177e4SLinus Torvalds /* Build locate_record+read/write/ccws. */ 27091da177e4SLinus Torvalds LO_data = (struct LO_eckd_data *) (idaws + cidaw); 27101da177e4SLinus Torvalds recid = first_rec; 27111da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 27121da177e4SLinus Torvalds /* Only standard blocks so there is just one locate record. */ 27131da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 27141da177e4SLinus Torvalds locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 27158e09f215SStefan Weinhuber last_rec - recid + 1, cmd, basedev, blksize); 27161da177e4SLinus Torvalds } 27175705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 27187988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 27191da177e4SLinus Torvalds if (dasd_page_cache) { 27201da177e4SLinus Torvalds char *copy = kmem_cache_alloc(dasd_page_cache, 2721441e143eSChristoph Lameter GFP_DMA | __GFP_NOWARN); 27221da177e4SLinus Torvalds if (copy && rq_data_dir(req) == WRITE) 27237988613bSKent Overstreet memcpy(copy + bv.bv_offset, dst, bv.bv_len); 27241da177e4SLinus Torvalds if (copy) 27257988613bSKent Overstreet dst = copy + bv.bv_offset; 27261da177e4SLinus Torvalds } 27277988613bSKent Overstreet for (off = 0; off < bv.bv_len; off += blksize) { 27281da177e4SLinus Torvalds sector_t trkid = recid; 27291da177e4SLinus Torvalds unsigned int recoffs = sector_div(trkid, blk_per_trk); 27301da177e4SLinus Torvalds rcmd = cmd; 27311da177e4SLinus Torvalds count = blksize; 27321da177e4SLinus Torvalds /* Locate record for cdl special block ? */ 27331da177e4SLinus Torvalds if (private->uses_cdl && recid < 2*blk_per_trk) { 27341da177e4SLinus Torvalds if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 27351da177e4SLinus Torvalds rcmd |= 0x8; 27361da177e4SLinus Torvalds count = dasd_eckd_cdl_reclen(recid); 2737ec5883abSHorst Hummel if (count < blksize && 2738ec5883abSHorst Hummel rq_data_dir(req) == READ) 27391da177e4SLinus Torvalds memset(dst + count, 0xe5, 27401da177e4SLinus Torvalds blksize - count); 27411da177e4SLinus Torvalds } 27421da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 27431da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 27441da177e4SLinus Torvalds trkid, recoffs + 1, 27458e09f215SStefan Weinhuber 1, rcmd, basedev, count); 27461da177e4SLinus Torvalds } 27471da177e4SLinus Torvalds /* Locate record for standard blocks ? */ 27481da177e4SLinus Torvalds if (private->uses_cdl && recid == 2*blk_per_trk) { 27491da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 27501da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 27511da177e4SLinus Torvalds trkid, recoffs + 1, 27521da177e4SLinus Torvalds last_rec - recid + 1, 27538e09f215SStefan Weinhuber cmd, basedev, count); 27541da177e4SLinus Torvalds } 27551da177e4SLinus Torvalds /* Read/write ccw. */ 27561da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 27571da177e4SLinus Torvalds ccw->cmd_code = rcmd; 27581da177e4SLinus Torvalds ccw->count = count; 27591da177e4SLinus Torvalds if (idal_is_needed(dst, blksize)) { 27601da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) idaws; 27611da177e4SLinus Torvalds ccw->flags = CCW_FLAG_IDA; 27621da177e4SLinus Torvalds idaws = idal_create_words(idaws, dst, blksize); 27631da177e4SLinus Torvalds } else { 27641da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) dst; 27651da177e4SLinus Torvalds ccw->flags = 0; 27661da177e4SLinus Torvalds } 27671da177e4SLinus Torvalds ccw++; 27681da177e4SLinus Torvalds dst += blksize; 27691da177e4SLinus Torvalds recid++; 27701da177e4SLinus Torvalds } 27711da177e4SLinus Torvalds } 277213de227bSHolger Smolinski if (blk_noretry_request(req) || 277313de227bSHolger Smolinski block->base->features & DASD_FEATURE_FAILFAST) 27741c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 27758e09f215SStefan Weinhuber cqr->startdev = startdev; 27768e09f215SStefan Weinhuber cqr->memdev = startdev; 27778e09f215SStefan Weinhuber cqr->block = block; 27787c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2779a4d26c6aSStefan Weinhuber cqr->lpm = startdev->path_data.ppm; 27801f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 27811aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 27821da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 27831da177e4SLinus Torvalds return cqr; 27841da177e4SLinus Torvalds } 27851da177e4SLinus Torvalds 2786f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 2787f3eb5384SStefan Weinhuber struct dasd_device *startdev, 2788f3eb5384SStefan Weinhuber struct dasd_block *block, 2789f3eb5384SStefan Weinhuber struct request *req, 2790f3eb5384SStefan Weinhuber sector_t first_rec, 2791f3eb5384SStefan Weinhuber sector_t last_rec, 2792f3eb5384SStefan Weinhuber sector_t first_trk, 2793f3eb5384SStefan Weinhuber sector_t last_trk, 2794f3eb5384SStefan Weinhuber unsigned int first_offs, 2795f3eb5384SStefan Weinhuber unsigned int last_offs, 2796f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 2797f3eb5384SStefan Weinhuber unsigned int blksize) 2798f3eb5384SStefan Weinhuber { 2799f3eb5384SStefan Weinhuber unsigned long *idaws; 2800f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 2801f3eb5384SStefan Weinhuber struct ccw1 *ccw; 2802f3eb5384SStefan Weinhuber struct req_iterator iter; 28037988613bSKent Overstreet struct bio_vec bv; 2804f3eb5384SStefan Weinhuber char *dst, *idaw_dst; 2805f3eb5384SStefan Weinhuber unsigned int cidaw, cplength, datasize; 2806f3eb5384SStefan Weinhuber unsigned int tlf; 2807f3eb5384SStefan Weinhuber sector_t recid; 2808f3eb5384SStefan Weinhuber unsigned char cmd; 2809f3eb5384SStefan Weinhuber struct dasd_device *basedev; 2810f3eb5384SStefan Weinhuber unsigned int trkcount, count, count_to_trk_end; 2811f3eb5384SStefan Weinhuber unsigned int idaw_len, seg_len, part_len, len_to_track_end; 2812f3eb5384SStefan Weinhuber unsigned char new_track, end_idaw; 2813f3eb5384SStefan Weinhuber sector_t trkid; 2814f3eb5384SStefan Weinhuber unsigned int recoffs; 2815f3eb5384SStefan Weinhuber 2816f3eb5384SStefan Weinhuber basedev = block->base; 2817f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) 2818f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 2819f3eb5384SStefan Weinhuber else if (rq_data_dir(req) == WRITE) 2820f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 2821f3eb5384SStefan Weinhuber else 2822f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 2823f3eb5384SStefan Weinhuber 2824f3eb5384SStefan Weinhuber /* Track based I/O needs IDAWs for each page, and not just for 2825f3eb5384SStefan Weinhuber * 64 bit addresses. We need additional idals for pages 2826f3eb5384SStefan Weinhuber * that get filled from two tracks, so we use the number 2827f3eb5384SStefan Weinhuber * of records as upper limit. 2828f3eb5384SStefan Weinhuber */ 2829f3eb5384SStefan Weinhuber cidaw = last_rec - first_rec + 1; 2830f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 2831f3eb5384SStefan Weinhuber 2832f3eb5384SStefan Weinhuber /* 1x prefix + one read/write ccw per track */ 2833f3eb5384SStefan Weinhuber cplength = 1 + trkcount; 2834f3eb5384SStefan Weinhuber 2835f3eb5384SStefan Weinhuber /* on 31-bit we need space for two 32 bit addresses per page 2836f3eb5384SStefan Weinhuber * on 64-bit one 64 bit address 2837f3eb5384SStefan Weinhuber */ 2838f3eb5384SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 2839f3eb5384SStefan Weinhuber cidaw * sizeof(unsigned long long); 2840f3eb5384SStefan Weinhuber 2841f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 284268b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 284368b781feSStefan Haberland startdev); 2844f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 2845f3eb5384SStefan Weinhuber return cqr; 2846f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 2847f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 2848f3eb5384SStefan Weinhuber if (first_trk == last_trk) 2849f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 2850f3eb5384SStefan Weinhuber else 2851f3eb5384SStefan Weinhuber tlf = last_offs + 1; 2852f3eb5384SStefan Weinhuber tlf *= blksize; 2853f3eb5384SStefan Weinhuber 2854f3eb5384SStefan Weinhuber if (prefix_LRE(ccw++, cqr->data, first_trk, 2855f3eb5384SStefan Weinhuber last_trk, cmd, basedev, startdev, 2856f3eb5384SStefan Weinhuber 1 /* format */, first_offs + 1, 2857f3eb5384SStefan Weinhuber trkcount, blksize, 2858f3eb5384SStefan Weinhuber tlf) == -EAGAIN) { 2859f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 2860f3eb5384SStefan Weinhuber * Try again later. 2861f3eb5384SStefan Weinhuber */ 2862f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2863f3eb5384SStefan Weinhuber return ERR_PTR(-EAGAIN); 2864f3eb5384SStefan Weinhuber } 2865f3eb5384SStefan Weinhuber 2866f3eb5384SStefan Weinhuber /* 2867f3eb5384SStefan Weinhuber * The translation of request into ccw programs must meet the 2868f3eb5384SStefan Weinhuber * following conditions: 2869f3eb5384SStefan Weinhuber * - all idaws but the first and the last must address full pages 2870f3eb5384SStefan Weinhuber * (or 2K blocks on 31-bit) 2871f3eb5384SStefan Weinhuber * - the scope of a ccw and it's idal ends with the track boundaries 2872f3eb5384SStefan Weinhuber */ 2873f3eb5384SStefan Weinhuber idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); 2874f3eb5384SStefan Weinhuber recid = first_rec; 2875f3eb5384SStefan Weinhuber new_track = 1; 2876f3eb5384SStefan Weinhuber end_idaw = 0; 2877f3eb5384SStefan Weinhuber len_to_track_end = 0; 2878246ccea1SMartin Schwidefsky idaw_dst = NULL; 2879f3eb5384SStefan Weinhuber idaw_len = 0; 2880f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 28817988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 28827988613bSKent Overstreet seg_len = bv.bv_len; 2883f3eb5384SStefan Weinhuber while (seg_len) { 2884f3eb5384SStefan Weinhuber if (new_track) { 2885f3eb5384SStefan Weinhuber trkid = recid; 2886f3eb5384SStefan Weinhuber recoffs = sector_div(trkid, blk_per_trk); 2887f3eb5384SStefan Weinhuber count_to_trk_end = blk_per_trk - recoffs; 2888f3eb5384SStefan Weinhuber count = min((last_rec - recid + 1), 2889f3eb5384SStefan Weinhuber (sector_t)count_to_trk_end); 2890f3eb5384SStefan Weinhuber len_to_track_end = count * blksize; 2891f3eb5384SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 2892f3eb5384SStefan Weinhuber ccw->cmd_code = cmd; 2893f3eb5384SStefan Weinhuber ccw->count = len_to_track_end; 2894f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 2895f3eb5384SStefan Weinhuber ccw->flags = CCW_FLAG_IDA; 2896f3eb5384SStefan Weinhuber ccw++; 2897f3eb5384SStefan Weinhuber recid += count; 2898f3eb5384SStefan Weinhuber new_track = 0; 289952db45c3SStefan Weinhuber /* first idaw for a ccw may start anywhere */ 290052db45c3SStefan Weinhuber if (!idaw_dst) 290152db45c3SStefan Weinhuber idaw_dst = dst; 2902f3eb5384SStefan Weinhuber } 290352db45c3SStefan Weinhuber /* If we start a new idaw, we must make sure that it 290452db45c3SStefan Weinhuber * starts on an IDA_BLOCK_SIZE boundary. 2905f3eb5384SStefan Weinhuber * If we continue an idaw, we must make sure that the 2906f3eb5384SStefan Weinhuber * current segment begins where the so far accumulated 2907f3eb5384SStefan Weinhuber * idaw ends 2908f3eb5384SStefan Weinhuber */ 290952db45c3SStefan Weinhuber if (!idaw_dst) { 291052db45c3SStefan Weinhuber if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { 291152db45c3SStefan Weinhuber dasd_sfree_request(cqr, startdev); 291252db45c3SStefan Weinhuber return ERR_PTR(-ERANGE); 291352db45c3SStefan Weinhuber } else 2914f3eb5384SStefan Weinhuber idaw_dst = dst; 291552db45c3SStefan Weinhuber } 2916f3eb5384SStefan Weinhuber if ((idaw_dst + idaw_len) != dst) { 2917f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2918f3eb5384SStefan Weinhuber return ERR_PTR(-ERANGE); 2919f3eb5384SStefan Weinhuber } 2920f3eb5384SStefan Weinhuber part_len = min(seg_len, len_to_track_end); 2921f3eb5384SStefan Weinhuber seg_len -= part_len; 2922f3eb5384SStefan Weinhuber dst += part_len; 2923f3eb5384SStefan Weinhuber idaw_len += part_len; 2924f3eb5384SStefan Weinhuber len_to_track_end -= part_len; 2925f3eb5384SStefan Weinhuber /* collected memory area ends on an IDA_BLOCK border, 2926f3eb5384SStefan Weinhuber * -> create an idaw 2927f3eb5384SStefan Weinhuber * idal_create_words will handle cases where idaw_len 2928f3eb5384SStefan Weinhuber * is larger then IDA_BLOCK_SIZE 2929f3eb5384SStefan Weinhuber */ 2930f3eb5384SStefan Weinhuber if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) 2931f3eb5384SStefan Weinhuber end_idaw = 1; 2932f3eb5384SStefan Weinhuber /* We also need to end the idaw at track end */ 2933f3eb5384SStefan Weinhuber if (!len_to_track_end) { 2934f3eb5384SStefan Weinhuber new_track = 1; 2935f3eb5384SStefan Weinhuber end_idaw = 1; 2936f3eb5384SStefan Weinhuber } 2937f3eb5384SStefan Weinhuber if (end_idaw) { 2938f3eb5384SStefan Weinhuber idaws = idal_create_words(idaws, idaw_dst, 2939f3eb5384SStefan Weinhuber idaw_len); 2940246ccea1SMartin Schwidefsky idaw_dst = NULL; 2941f3eb5384SStefan Weinhuber idaw_len = 0; 2942f3eb5384SStefan Weinhuber end_idaw = 0; 2943f3eb5384SStefan Weinhuber } 2944f3eb5384SStefan Weinhuber } 2945f3eb5384SStefan Weinhuber } 2946f3eb5384SStefan Weinhuber 2947f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 2948f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 2949f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2950f3eb5384SStefan Weinhuber cqr->startdev = startdev; 2951f3eb5384SStefan Weinhuber cqr->memdev = startdev; 2952f3eb5384SStefan Weinhuber cqr->block = block; 29537c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2954a4d26c6aSStefan Weinhuber cqr->lpm = startdev->path_data.ppm; 29551f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 29561aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 2957f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 2958f3eb5384SStefan Weinhuber return cqr; 2959f3eb5384SStefan Weinhuber } 2960f3eb5384SStefan Weinhuber 2961f3eb5384SStefan Weinhuber static int prepare_itcw(struct itcw *itcw, 2962f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 2963f3eb5384SStefan Weinhuber struct dasd_device *basedev, 2964f3eb5384SStefan Weinhuber struct dasd_device *startdev, 2965f3eb5384SStefan Weinhuber unsigned int rec_on_trk, int count, 2966f3eb5384SStefan Weinhuber unsigned int blksize, 2967f3eb5384SStefan Weinhuber unsigned int total_data_size, 2968f3eb5384SStefan Weinhuber unsigned int tlf, 2969f3eb5384SStefan Weinhuber unsigned int blk_per_trk) 2970f3eb5384SStefan Weinhuber { 2971f3eb5384SStefan Weinhuber struct PFX_eckd_data pfxdata; 2972f3eb5384SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 2973f3eb5384SStefan Weinhuber struct DE_eckd_data *dedata; 2974f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 2975f3eb5384SStefan Weinhuber struct dcw *dcw; 2976f3eb5384SStefan Weinhuber 2977f3eb5384SStefan Weinhuber u32 begcyl, endcyl; 2978f3eb5384SStefan Weinhuber u16 heads, beghead, endhead; 2979f3eb5384SStefan Weinhuber u8 pfx_cmd; 2980f3eb5384SStefan Weinhuber 2981f3eb5384SStefan Weinhuber int rc = 0; 2982f3eb5384SStefan Weinhuber int sector = 0; 2983f3eb5384SStefan Weinhuber int dn, d; 2984f3eb5384SStefan Weinhuber 2985f3eb5384SStefan Weinhuber 2986f3eb5384SStefan Weinhuber /* setup prefix data */ 2987f3eb5384SStefan Weinhuber basepriv = (struct dasd_eckd_private *) basedev->private; 2988f3eb5384SStefan Weinhuber startpriv = (struct dasd_eckd_private *) startdev->private; 2989f3eb5384SStefan Weinhuber dedata = &pfxdata.define_extent; 2990f3eb5384SStefan Weinhuber lredata = &pfxdata.locate_record; 2991f3eb5384SStefan Weinhuber 2992f3eb5384SStefan Weinhuber memset(&pfxdata, 0, sizeof(pfxdata)); 2993f3eb5384SStefan Weinhuber pfxdata.format = 1; /* PFX with LRE */ 2994f3eb5384SStefan Weinhuber pfxdata.base_address = basepriv->ned->unit_addr; 2995f3eb5384SStefan Weinhuber pfxdata.base_lss = basepriv->ned->ID; 2996f3eb5384SStefan Weinhuber pfxdata.validity.define_extent = 1; 2997f3eb5384SStefan Weinhuber 2998f3eb5384SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 2999f3eb5384SStefan Weinhuber if (startpriv->uid.type != UA_BASE_DEVICE) { 3000f3eb5384SStefan Weinhuber pfxdata.validity.verify_base = 1; 3001f3eb5384SStefan Weinhuber if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 3002f3eb5384SStefan Weinhuber pfxdata.validity.hyper_pav = 1; 3003f3eb5384SStefan Weinhuber } 3004f3eb5384SStefan Weinhuber 3005f3eb5384SStefan Weinhuber switch (cmd) { 3006f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 3007f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 3008f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 3009f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 3010f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 3011f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 3012f3eb5384SStefan Weinhuber lredata->operation.operation = 0x0C; 3013f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x01; 3014f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX_READ; 3015f3eb5384SStefan Weinhuber break; 3016f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 3017f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 3018f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 3019f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 3020f3eb5384SStefan Weinhuber rc = check_XRC_on_prefix(&pfxdata, basedev); 3021f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 3022f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 3023f3eb5384SStefan Weinhuber lredata->operation.operation = 0x3F; 3024f3eb5384SStefan Weinhuber lredata->extended_operation = 0x23; 3025f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x2; 3026f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX; 3027f3eb5384SStefan Weinhuber break; 3028f3eb5384SStefan Weinhuber default: 3029f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 3030f3eb5384SStefan Weinhuber "prepare itcw, unknown opcode 0x%x", cmd); 3031f3eb5384SStefan Weinhuber BUG(); 3032f3eb5384SStefan Weinhuber break; 3033f3eb5384SStefan Weinhuber } 3034f3eb5384SStefan Weinhuber if (rc) 3035f3eb5384SStefan Weinhuber return rc; 3036f3eb5384SStefan Weinhuber 3037f3eb5384SStefan Weinhuber dedata->attributes.mode = 0x3; /* ECKD */ 3038f3eb5384SStefan Weinhuber 3039f3eb5384SStefan Weinhuber heads = basepriv->rdc_data.trk_per_cyl; 3040f3eb5384SStefan Weinhuber begcyl = trk / heads; 3041f3eb5384SStefan Weinhuber beghead = trk % heads; 3042f3eb5384SStefan Weinhuber endcyl = totrk / heads; 3043f3eb5384SStefan Weinhuber endhead = totrk % heads; 3044f3eb5384SStefan Weinhuber 3045f3eb5384SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 3046f3eb5384SStefan Weinhuber if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 3047f3eb5384SStefan Weinhuber dedata->attributes.operation == DASD_SEQ_ACCESS) { 3048f3eb5384SStefan Weinhuber 3049f3eb5384SStefan Weinhuber if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 3050f3eb5384SStefan Weinhuber endcyl += basepriv->attrib.nr_cyl; 3051f3eb5384SStefan Weinhuber else 3052f3eb5384SStefan Weinhuber endcyl = (basepriv->real_cyl - 1); 3053f3eb5384SStefan Weinhuber } 3054f3eb5384SStefan Weinhuber 3055f3eb5384SStefan Weinhuber set_ch_t(&dedata->beg_ext, begcyl, beghead); 3056f3eb5384SStefan Weinhuber set_ch_t(&dedata->end_ext, endcyl, endhead); 3057f3eb5384SStefan Weinhuber 3058f3eb5384SStefan Weinhuber dedata->ep_format = 0x20; /* records per track is valid */ 3059f3eb5384SStefan Weinhuber dedata->ep_rec_per_track = blk_per_trk; 3060f3eb5384SStefan Weinhuber 3061f3eb5384SStefan Weinhuber if (rec_on_trk) { 3062f3eb5384SStefan Weinhuber switch (basepriv->rdc_data.dev_type) { 3063f3eb5384SStefan Weinhuber case 0x3390: 3064f3eb5384SStefan Weinhuber dn = ceil_quot(blksize + 6, 232); 3065f3eb5384SStefan Weinhuber d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); 3066f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 3067f3eb5384SStefan Weinhuber break; 3068f3eb5384SStefan Weinhuber case 0x3380: 3069f3eb5384SStefan Weinhuber d = 7 + ceil_quot(blksize + 12, 32); 3070f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 3071f3eb5384SStefan Weinhuber break; 3072f3eb5384SStefan Weinhuber } 3073f3eb5384SStefan Weinhuber } 3074f3eb5384SStefan Weinhuber 3075f3eb5384SStefan Weinhuber lredata->auxiliary.length_valid = 1; 3076f3eb5384SStefan Weinhuber lredata->auxiliary.length_scope = 1; 3077f3eb5384SStefan Weinhuber lredata->auxiliary.imbedded_ccw_valid = 1; 3078f3eb5384SStefan Weinhuber lredata->length = tlf; 3079f3eb5384SStefan Weinhuber lredata->imbedded_ccw = cmd; 3080f3eb5384SStefan Weinhuber lredata->count = count; 3081f3eb5384SStefan Weinhuber lredata->sector = sector; 3082f3eb5384SStefan Weinhuber set_ch_t(&lredata->seek_addr, begcyl, beghead); 3083f3eb5384SStefan Weinhuber lredata->search_arg.cyl = lredata->seek_addr.cyl; 3084f3eb5384SStefan Weinhuber lredata->search_arg.head = lredata->seek_addr.head; 3085f3eb5384SStefan Weinhuber lredata->search_arg.record = rec_on_trk; 3086f3eb5384SStefan Weinhuber 3087f3eb5384SStefan Weinhuber dcw = itcw_add_dcw(itcw, pfx_cmd, 0, 3088f3eb5384SStefan Weinhuber &pfxdata, sizeof(pfxdata), total_data_size); 308982a7b955SThomas Meyer return PTR_RET(dcw); 3090f3eb5384SStefan Weinhuber } 3091f3eb5384SStefan Weinhuber 3092f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 3093f3eb5384SStefan Weinhuber struct dasd_device *startdev, 3094f3eb5384SStefan Weinhuber struct dasd_block *block, 3095f3eb5384SStefan Weinhuber struct request *req, 3096f3eb5384SStefan Weinhuber sector_t first_rec, 3097f3eb5384SStefan Weinhuber sector_t last_rec, 3098f3eb5384SStefan Weinhuber sector_t first_trk, 3099f3eb5384SStefan Weinhuber sector_t last_trk, 3100f3eb5384SStefan Weinhuber unsigned int first_offs, 3101f3eb5384SStefan Weinhuber unsigned int last_offs, 3102f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 3103f3eb5384SStefan Weinhuber unsigned int blksize) 3104f3eb5384SStefan Weinhuber { 3105f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 3106f3eb5384SStefan Weinhuber struct req_iterator iter; 31077988613bSKent Overstreet struct bio_vec bv; 3108f3eb5384SStefan Weinhuber char *dst; 3109f3eb5384SStefan Weinhuber unsigned int trkcount, ctidaw; 3110f3eb5384SStefan Weinhuber unsigned char cmd; 3111f3eb5384SStefan Weinhuber struct dasd_device *basedev; 3112f3eb5384SStefan Weinhuber unsigned int tlf; 3113f3eb5384SStefan Weinhuber struct itcw *itcw; 3114f3eb5384SStefan Weinhuber struct tidaw *last_tidaw = NULL; 3115f3eb5384SStefan Weinhuber int itcw_op; 3116f3eb5384SStefan Weinhuber size_t itcw_size; 3117ef19298bSStefan Weinhuber u8 tidaw_flags; 3118ef19298bSStefan Weinhuber unsigned int seg_len, part_len, len_to_track_end; 3119ef19298bSStefan Weinhuber unsigned char new_track; 3120ef19298bSStefan Weinhuber sector_t recid, trkid; 3121ef19298bSStefan Weinhuber unsigned int offs; 3122ef19298bSStefan Weinhuber unsigned int count, count_to_trk_end; 3123cd10502bSJulia Lawall int ret; 3124f3eb5384SStefan Weinhuber 3125f3eb5384SStefan Weinhuber basedev = block->base; 3126f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) { 3127f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 3128f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_READ; 3129f3eb5384SStefan Weinhuber } else if (rq_data_dir(req) == WRITE) { 3130f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 3131f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_WRITE; 3132f3eb5384SStefan Weinhuber } else 3133f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 3134f3eb5384SStefan Weinhuber 3135f3eb5384SStefan Weinhuber /* trackbased I/O needs address all memory via TIDAWs, 3136f3eb5384SStefan Weinhuber * not just for 64 bit addresses. This allows us to map 3137f3eb5384SStefan Weinhuber * each segment directly to one tidaw. 3138ef19298bSStefan Weinhuber * In the case of write requests, additional tidaws may 3139ef19298bSStefan Weinhuber * be needed when a segment crosses a track boundary. 3140f3eb5384SStefan Weinhuber */ 3141f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 3142f3eb5384SStefan Weinhuber ctidaw = 0; 3143f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 3144f3eb5384SStefan Weinhuber ++ctidaw; 3145f3eb5384SStefan Weinhuber } 3146ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 3147ef19298bSStefan Weinhuber ctidaw += (last_trk - first_trk); 3148f3eb5384SStefan Weinhuber 3149f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 3150f3eb5384SStefan Weinhuber itcw_size = itcw_calc_size(0, ctidaw, 0); 315168b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 3152f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 3153f3eb5384SStefan Weinhuber return cqr; 3154f3eb5384SStefan Weinhuber 3155f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 3156f3eb5384SStefan Weinhuber if (first_trk == last_trk) 3157f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 3158f3eb5384SStefan Weinhuber else 3159f3eb5384SStefan Weinhuber tlf = last_offs + 1; 3160f3eb5384SStefan Weinhuber tlf *= blksize; 3161f3eb5384SStefan Weinhuber 3162f3eb5384SStefan Weinhuber itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); 3163ef19298bSStefan Weinhuber if (IS_ERR(itcw)) { 3164cd10502bSJulia Lawall ret = -EINVAL; 3165cd10502bSJulia Lawall goto out_error; 3166ef19298bSStefan Weinhuber } 3167f3eb5384SStefan Weinhuber cqr->cpaddr = itcw_get_tcw(itcw); 3168f3eb5384SStefan Weinhuber if (prepare_itcw(itcw, first_trk, last_trk, 3169f3eb5384SStefan Weinhuber cmd, basedev, startdev, 3170f3eb5384SStefan Weinhuber first_offs + 1, 3171f3eb5384SStefan Weinhuber trkcount, blksize, 3172f3eb5384SStefan Weinhuber (last_rec - first_rec + 1) * blksize, 3173f3eb5384SStefan Weinhuber tlf, blk_per_trk) == -EAGAIN) { 3174f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 3175f3eb5384SStefan Weinhuber * Try again later. 3176f3eb5384SStefan Weinhuber */ 3177cd10502bSJulia Lawall ret = -EAGAIN; 3178cd10502bSJulia Lawall goto out_error; 3179f3eb5384SStefan Weinhuber } 3180d54cddb6SHeiko Carstens len_to_track_end = 0; 3181f3eb5384SStefan Weinhuber /* 3182f3eb5384SStefan Weinhuber * A tidaw can address 4k of memory, but must not cross page boundaries 3183f3eb5384SStefan Weinhuber * We can let the block layer handle this by setting 3184f3eb5384SStefan Weinhuber * blk_queue_segment_boundary to page boundaries and 3185f3eb5384SStefan Weinhuber * blk_max_segment_size to page size when setting up the request queue. 3186ef19298bSStefan Weinhuber * For write requests, a TIDAW must not cross track boundaries, because 3187ef19298bSStefan Weinhuber * we have to set the CBC flag on the last tidaw for each track. 3188f3eb5384SStefan Weinhuber */ 3189ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) { 3190ef19298bSStefan Weinhuber new_track = 1; 3191ef19298bSStefan Weinhuber recid = first_rec; 3192f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 31937988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 31947988613bSKent Overstreet seg_len = bv.bv_len; 3195ef19298bSStefan Weinhuber while (seg_len) { 3196ef19298bSStefan Weinhuber if (new_track) { 3197ef19298bSStefan Weinhuber trkid = recid; 3198ef19298bSStefan Weinhuber offs = sector_div(trkid, blk_per_trk); 3199ef19298bSStefan Weinhuber count_to_trk_end = blk_per_trk - offs; 3200ef19298bSStefan Weinhuber count = min((last_rec - recid + 1), 3201ef19298bSStefan Weinhuber (sector_t)count_to_trk_end); 3202ef19298bSStefan Weinhuber len_to_track_end = count * blksize; 3203ef19298bSStefan Weinhuber recid += count; 3204ef19298bSStefan Weinhuber new_track = 0; 3205f3eb5384SStefan Weinhuber } 3206ef19298bSStefan Weinhuber part_len = min(seg_len, len_to_track_end); 3207ef19298bSStefan Weinhuber seg_len -= part_len; 3208ef19298bSStefan Weinhuber len_to_track_end -= part_len; 3209ef19298bSStefan Weinhuber /* We need to end the tidaw at track end */ 3210ef19298bSStefan Weinhuber if (!len_to_track_end) { 3211ef19298bSStefan Weinhuber new_track = 1; 3212ef19298bSStefan Weinhuber tidaw_flags = TIDAW_FLAGS_INSERT_CBC; 3213ef19298bSStefan Weinhuber } else 3214ef19298bSStefan Weinhuber tidaw_flags = 0; 3215ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, 3216ef19298bSStefan Weinhuber dst, part_len); 3217cd10502bSJulia Lawall if (IS_ERR(last_tidaw)) { 3218cd10502bSJulia Lawall ret = -EINVAL; 3219cd10502bSJulia Lawall goto out_error; 3220cd10502bSJulia Lawall } 3221ef19298bSStefan Weinhuber dst += part_len; 3222ef19298bSStefan Weinhuber } 3223ef19298bSStefan Weinhuber } 3224ef19298bSStefan Weinhuber } else { 3225ef19298bSStefan Weinhuber rq_for_each_segment(bv, req, iter) { 32267988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 3227ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, 0x00, 32287988613bSKent Overstreet dst, bv.bv_len); 3229cd10502bSJulia Lawall if (IS_ERR(last_tidaw)) { 3230cd10502bSJulia Lawall ret = -EINVAL; 3231cd10502bSJulia Lawall goto out_error; 3232cd10502bSJulia Lawall } 3233ef19298bSStefan Weinhuber } 3234ef19298bSStefan Weinhuber } 3235ef19298bSStefan Weinhuber last_tidaw->flags |= TIDAW_FLAGS_LAST; 3236ef19298bSStefan Weinhuber last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; 3237f3eb5384SStefan Weinhuber itcw_finalize(itcw); 3238f3eb5384SStefan Weinhuber 3239f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 3240f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 3241f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3242ef19298bSStefan Weinhuber cqr->cpmode = 1; 3243f3eb5384SStefan Weinhuber cqr->startdev = startdev; 3244f3eb5384SStefan Weinhuber cqr->memdev = startdev; 3245f3eb5384SStefan Weinhuber cqr->block = block; 32467c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 3247a4d26c6aSStefan Weinhuber cqr->lpm = startdev->path_data.ppm; 32481f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 32491aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 3250f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 3251f3eb5384SStefan Weinhuber return cqr; 3252cd10502bSJulia Lawall out_error: 3253cd10502bSJulia Lawall dasd_sfree_request(cqr, startdev); 3254cd10502bSJulia Lawall return ERR_PTR(ret); 3255f3eb5384SStefan Weinhuber } 3256f3eb5384SStefan Weinhuber 3257f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 3258f3eb5384SStefan Weinhuber struct dasd_block *block, 3259f3eb5384SStefan Weinhuber struct request *req) 3260f3eb5384SStefan Weinhuber { 3261ef19298bSStefan Weinhuber int cmdrtd, cmdwtd; 3262f3eb5384SStefan Weinhuber int use_prefix; 3263ef19298bSStefan Weinhuber int fcx_multitrack; 326445b44d76SStefan Weinhuber struct dasd_eckd_private *private; 3265f3eb5384SStefan Weinhuber struct dasd_device *basedev; 3266f3eb5384SStefan Weinhuber sector_t first_rec, last_rec; 3267f3eb5384SStefan Weinhuber sector_t first_trk, last_trk; 3268f3eb5384SStefan Weinhuber unsigned int first_offs, last_offs; 3269f3eb5384SStefan Weinhuber unsigned int blk_per_trk, blksize; 3270f3eb5384SStefan Weinhuber int cdlspecial; 3271ef19298bSStefan Weinhuber unsigned int data_size; 3272f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 3273f3eb5384SStefan Weinhuber 3274f3eb5384SStefan Weinhuber basedev = block->base; 3275f3eb5384SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 3276f3eb5384SStefan Weinhuber 3277f3eb5384SStefan Weinhuber /* Calculate number of blocks/records per track. */ 3278f3eb5384SStefan Weinhuber blksize = block->bp_block; 3279f3eb5384SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 32806fca97a9SStefan Haberland if (blk_per_trk == 0) 32816fca97a9SStefan Haberland return ERR_PTR(-EINVAL); 3282f3eb5384SStefan Weinhuber /* Calculate record id of first and last block. */ 328383096ebfSTejun Heo first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; 3284f3eb5384SStefan Weinhuber first_offs = sector_div(first_trk, blk_per_trk); 3285f3eb5384SStefan Weinhuber last_rec = last_trk = 328683096ebfSTejun Heo (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 3287f3eb5384SStefan Weinhuber last_offs = sector_div(last_trk, blk_per_trk); 3288f3eb5384SStefan Weinhuber cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); 3289f3eb5384SStefan Weinhuber 3290ef19298bSStefan Weinhuber fcx_multitrack = private->features.feature[40] & 0x20; 3291ef19298bSStefan Weinhuber data_size = blk_rq_bytes(req); 329226a35f37SStefan Weinhuber if (data_size % blksize) 329326a35f37SStefan Weinhuber return ERR_PTR(-EINVAL); 3294ef19298bSStefan Weinhuber /* tpm write request add CBC data on each track boundary */ 3295ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 3296ef19298bSStefan Weinhuber data_size += (last_trk - first_trk) * 4; 3297f3eb5384SStefan Weinhuber 3298f3eb5384SStefan Weinhuber /* is read track data and write track data in command mode supported? */ 3299f3eb5384SStefan Weinhuber cmdrtd = private->features.feature[9] & 0x20; 3300f3eb5384SStefan Weinhuber cmdwtd = private->features.feature[12] & 0x40; 3301f3eb5384SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 3302f3eb5384SStefan Weinhuber 3303f3eb5384SStefan Weinhuber cqr = NULL; 3304f3eb5384SStefan Weinhuber if (cdlspecial || dasd_page_cache) { 3305f3eb5384SStefan Weinhuber /* do nothing, just fall through to the cmd mode single case */ 3306ef19298bSStefan Weinhuber } else if ((data_size <= private->fcx_max_data) 3307ef19298bSStefan Weinhuber && (fcx_multitrack || (first_trk == last_trk))) { 3308f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, 3309f3eb5384SStefan Weinhuber first_rec, last_rec, 3310f3eb5384SStefan Weinhuber first_trk, last_trk, 3311f3eb5384SStefan Weinhuber first_offs, last_offs, 3312f3eb5384SStefan Weinhuber blk_per_trk, blksize); 3313ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3314ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 3315f3eb5384SStefan Weinhuber cqr = NULL; 3316f3eb5384SStefan Weinhuber } else if (use_prefix && 3317f3eb5384SStefan Weinhuber (((rq_data_dir(req) == READ) && cmdrtd) || 3318f3eb5384SStefan Weinhuber ((rq_data_dir(req) == WRITE) && cmdwtd))) { 3319f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, 3320f3eb5384SStefan Weinhuber first_rec, last_rec, 3321f3eb5384SStefan Weinhuber first_trk, last_trk, 3322f3eb5384SStefan Weinhuber first_offs, last_offs, 3323f3eb5384SStefan Weinhuber blk_per_trk, blksize); 3324ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3325ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 3326f3eb5384SStefan Weinhuber cqr = NULL; 3327f3eb5384SStefan Weinhuber } 3328f3eb5384SStefan Weinhuber if (!cqr) 3329f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, 3330f3eb5384SStefan Weinhuber first_rec, last_rec, 3331f3eb5384SStefan Weinhuber first_trk, last_trk, 3332f3eb5384SStefan Weinhuber first_offs, last_offs, 3333f3eb5384SStefan Weinhuber blk_per_trk, blksize); 3334f3eb5384SStefan Weinhuber return cqr; 3335f3eb5384SStefan Weinhuber } 3336f3eb5384SStefan Weinhuber 3337e4dbb0f2SStefan Haberland static struct dasd_ccw_req *dasd_raw_build_cp(struct dasd_device *startdev, 3338e4dbb0f2SStefan Haberland struct dasd_block *block, 3339e4dbb0f2SStefan Haberland struct request *req) 3340e4dbb0f2SStefan Haberland { 3341e4dbb0f2SStefan Haberland unsigned long *idaws; 3342e4dbb0f2SStefan Haberland struct dasd_device *basedev; 3343e4dbb0f2SStefan Haberland struct dasd_ccw_req *cqr; 3344e4dbb0f2SStefan Haberland struct ccw1 *ccw; 3345e4dbb0f2SStefan Haberland struct req_iterator iter; 33467988613bSKent Overstreet struct bio_vec bv; 3347e4dbb0f2SStefan Haberland char *dst; 3348e4dbb0f2SStefan Haberland unsigned char cmd; 3349e4dbb0f2SStefan Haberland unsigned int trkcount; 3350e4dbb0f2SStefan Haberland unsigned int seg_len, len_to_track_end; 3351e4dbb0f2SStefan Haberland unsigned int first_offs; 3352e4dbb0f2SStefan Haberland unsigned int cidaw, cplength, datasize; 3353558b9ef0SStefan Weinhuber sector_t first_trk, last_trk, sectors; 3354558b9ef0SStefan Weinhuber sector_t start_padding_sectors, end_sector_offset, end_padding_sectors; 3355e4dbb0f2SStefan Haberland unsigned int pfx_datasize; 3356e4dbb0f2SStefan Haberland 3357e4dbb0f2SStefan Haberland /* 3358e4dbb0f2SStefan Haberland * raw track access needs to be mutiple of 64k and on 64k boundary 3359558b9ef0SStefan Weinhuber * For read requests we can fix an incorrect alignment by padding 3360558b9ef0SStefan Weinhuber * the request with dummy pages. 3361e4dbb0f2SStefan Haberland */ 3362558b9ef0SStefan Weinhuber start_padding_sectors = blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK; 3363558b9ef0SStefan Weinhuber end_sector_offset = (blk_rq_pos(req) + blk_rq_sectors(req)) % 3364558b9ef0SStefan Weinhuber DASD_RAW_SECTORS_PER_TRACK; 3365558b9ef0SStefan Weinhuber end_padding_sectors = (DASD_RAW_SECTORS_PER_TRACK - end_sector_offset) % 3366558b9ef0SStefan Weinhuber DASD_RAW_SECTORS_PER_TRACK; 3367558b9ef0SStefan Weinhuber basedev = block->base; 3368558b9ef0SStefan Weinhuber if ((start_padding_sectors || end_padding_sectors) && 3369558b9ef0SStefan Weinhuber (rq_data_dir(req) == WRITE)) { 3370558b9ef0SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 3371558b9ef0SStefan Weinhuber "raw write not track aligned (%lu,%lu) req %p", 3372558b9ef0SStefan Weinhuber start_padding_sectors, end_padding_sectors, req); 3373e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EINVAL); 3374e4dbb0f2SStefan Haberland goto out; 3375e4dbb0f2SStefan Haberland } 3376e4dbb0f2SStefan Haberland 3377e4dbb0f2SStefan Haberland first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; 3378e4dbb0f2SStefan Haberland last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / 3379e4dbb0f2SStefan Haberland DASD_RAW_SECTORS_PER_TRACK; 3380e4dbb0f2SStefan Haberland trkcount = last_trk - first_trk + 1; 3381e4dbb0f2SStefan Haberland first_offs = 0; 3382e4dbb0f2SStefan Haberland 3383e4dbb0f2SStefan Haberland if (rq_data_dir(req) == READ) 3384e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_READ_TRACK; 3385e4dbb0f2SStefan Haberland else if (rq_data_dir(req) == WRITE) 3386e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; 3387e4dbb0f2SStefan Haberland else { 3388e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EINVAL); 3389e4dbb0f2SStefan Haberland goto out; 3390e4dbb0f2SStefan Haberland } 3391e4dbb0f2SStefan Haberland 3392e4dbb0f2SStefan Haberland /* 3393e4dbb0f2SStefan Haberland * Raw track based I/O needs IDAWs for each page, 3394e4dbb0f2SStefan Haberland * and not just for 64 bit addresses. 3395e4dbb0f2SStefan Haberland */ 3396e4dbb0f2SStefan Haberland cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; 3397e4dbb0f2SStefan Haberland 3398e4dbb0f2SStefan Haberland /* 1x prefix + one read/write ccw per track */ 3399e4dbb0f2SStefan Haberland cplength = 1 + trkcount; 3400e4dbb0f2SStefan Haberland 3401e4dbb0f2SStefan Haberland /* 3402e4dbb0f2SStefan Haberland * struct PFX_eckd_data has up to 2 byte as extended parameter 3403e4dbb0f2SStefan Haberland * this is needed for write full track and has to be mentioned 340425985edcSLucas De Marchi * separately 3405e4dbb0f2SStefan Haberland * add 8 instead of 2 to keep 8 byte boundary 3406e4dbb0f2SStefan Haberland */ 3407e4dbb0f2SStefan Haberland pfx_datasize = sizeof(struct PFX_eckd_data) + 8; 3408e4dbb0f2SStefan Haberland 3409e4dbb0f2SStefan Haberland datasize = pfx_datasize + cidaw * sizeof(unsigned long long); 3410e4dbb0f2SStefan Haberland 3411e4dbb0f2SStefan Haberland /* Allocate the ccw request. */ 3412e4dbb0f2SStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 3413e4dbb0f2SStefan Haberland datasize, startdev); 3414e4dbb0f2SStefan Haberland if (IS_ERR(cqr)) 3415e4dbb0f2SStefan Haberland goto out; 3416e4dbb0f2SStefan Haberland ccw = cqr->cpaddr; 3417e4dbb0f2SStefan Haberland 3418e4dbb0f2SStefan Haberland if (prefix_LRE(ccw++, cqr->data, first_trk, last_trk, cmd, 3419e4dbb0f2SStefan Haberland basedev, startdev, 1 /* format */, first_offs + 1, 3420e4dbb0f2SStefan Haberland trkcount, 0, 0) == -EAGAIN) { 3421e4dbb0f2SStefan Haberland /* Clock not in sync and XRC is enabled. 3422e4dbb0f2SStefan Haberland * Try again later. 3423e4dbb0f2SStefan Haberland */ 3424e4dbb0f2SStefan Haberland dasd_sfree_request(cqr, startdev); 3425e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EAGAIN); 3426e4dbb0f2SStefan Haberland goto out; 3427e4dbb0f2SStefan Haberland } 3428e4dbb0f2SStefan Haberland 3429e4dbb0f2SStefan Haberland idaws = (unsigned long *)(cqr->data + pfx_datasize); 3430e4dbb0f2SStefan Haberland len_to_track_end = 0; 3431558b9ef0SStefan Weinhuber if (start_padding_sectors) { 3432558b9ef0SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 3433558b9ef0SStefan Weinhuber ccw->cmd_code = cmd; 3434558b9ef0SStefan Weinhuber /* maximum 3390 track size */ 3435558b9ef0SStefan Weinhuber ccw->count = 57326; 3436558b9ef0SStefan Weinhuber /* 64k map to one track */ 3437558b9ef0SStefan Weinhuber len_to_track_end = 65536 - start_padding_sectors * 512; 3438558b9ef0SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 3439558b9ef0SStefan Weinhuber ccw->flags |= CCW_FLAG_IDA; 3440558b9ef0SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3441558b9ef0SStefan Weinhuber ccw++; 3442558b9ef0SStefan Weinhuber for (sectors = 0; sectors < start_padding_sectors; sectors += 8) 3443558b9ef0SStefan Weinhuber idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 3444558b9ef0SStefan Weinhuber } 3445e4dbb0f2SStefan Haberland rq_for_each_segment(bv, req, iter) { 34467988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 34477988613bSKent Overstreet seg_len = bv.bv_len; 3448558b9ef0SStefan Weinhuber if (cmd == DASD_ECKD_CCW_READ_TRACK) 3449558b9ef0SStefan Weinhuber memset(dst, 0, seg_len); 3450e4dbb0f2SStefan Haberland if (!len_to_track_end) { 3451e4dbb0f2SStefan Haberland ccw[-1].flags |= CCW_FLAG_CC; 3452e4dbb0f2SStefan Haberland ccw->cmd_code = cmd; 3453e4dbb0f2SStefan Haberland /* maximum 3390 track size */ 3454e4dbb0f2SStefan Haberland ccw->count = 57326; 3455e4dbb0f2SStefan Haberland /* 64k map to one track */ 3456e4dbb0f2SStefan Haberland len_to_track_end = 65536; 3457e4dbb0f2SStefan Haberland ccw->cda = (__u32)(addr_t)idaws; 3458e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_IDA; 3459e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 3460e4dbb0f2SStefan Haberland ccw++; 3461e4dbb0f2SStefan Haberland } 3462e4dbb0f2SStefan Haberland len_to_track_end -= seg_len; 3463e4dbb0f2SStefan Haberland idaws = idal_create_words(idaws, dst, seg_len); 3464e4dbb0f2SStefan Haberland } 3465558b9ef0SStefan Weinhuber for (sectors = 0; sectors < end_padding_sectors; sectors += 8) 3466558b9ef0SStefan Weinhuber idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 3467e4dbb0f2SStefan Haberland if (blk_noretry_request(req) || 3468e4dbb0f2SStefan Haberland block->base->features & DASD_FEATURE_FAILFAST) 3469e4dbb0f2SStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3470e4dbb0f2SStefan Haberland cqr->startdev = startdev; 3471e4dbb0f2SStefan Haberland cqr->memdev = startdev; 3472e4dbb0f2SStefan Haberland cqr->block = block; 3473e4dbb0f2SStefan Haberland cqr->expires = startdev->default_expires * HZ; 3474e4dbb0f2SStefan Haberland cqr->lpm = startdev->path_data.ppm; 34751f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 34761aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 3477e4dbb0f2SStefan Haberland cqr->status = DASD_CQR_FILLED; 3478e4dbb0f2SStefan Haberland 3479e4dbb0f2SStefan Haberland if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN) 3480e4dbb0f2SStefan Haberland cqr = NULL; 3481e4dbb0f2SStefan Haberland out: 3482e4dbb0f2SStefan Haberland return cqr; 3483e4dbb0f2SStefan Haberland } 3484e4dbb0f2SStefan Haberland 3485e4dbb0f2SStefan Haberland 34861da177e4SLinus Torvalds static int 34871da177e4SLinus Torvalds dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 34881da177e4SLinus Torvalds { 34891da177e4SLinus Torvalds struct dasd_eckd_private *private; 34901da177e4SLinus Torvalds struct ccw1 *ccw; 34915705f702SNeilBrown struct req_iterator iter; 34927988613bSKent Overstreet struct bio_vec bv; 34931da177e4SLinus Torvalds char *dst, *cda; 34941da177e4SLinus Torvalds unsigned int blksize, blk_per_trk, off; 34951da177e4SLinus Torvalds sector_t recid; 34965705f702SNeilBrown int status; 34971da177e4SLinus Torvalds 34981da177e4SLinus Torvalds if (!dasd_page_cache) 34991da177e4SLinus Torvalds goto out; 35008e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) cqr->block->base->private; 35018e09f215SStefan Weinhuber blksize = cqr->block->bp_block; 35021da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 350383096ebfSTejun Heo recid = blk_rq_pos(req) >> cqr->block->s2b_shift; 35041da177e4SLinus Torvalds ccw = cqr->cpaddr; 35051da177e4SLinus Torvalds /* Skip over define extent & locate record. */ 35061da177e4SLinus Torvalds ccw++; 35071da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 35081da177e4SLinus Torvalds ccw++; 35095705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 35107988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 35117988613bSKent Overstreet for (off = 0; off < bv.bv_len; off += blksize) { 35121da177e4SLinus Torvalds /* Skip locate record. */ 35131da177e4SLinus Torvalds if (private->uses_cdl && recid <= 2*blk_per_trk) 35141da177e4SLinus Torvalds ccw++; 35151da177e4SLinus Torvalds if (dst) { 35161da177e4SLinus Torvalds if (ccw->flags & CCW_FLAG_IDA) 35171da177e4SLinus Torvalds cda = *((char **)((addr_t) ccw->cda)); 35181da177e4SLinus Torvalds else 35191da177e4SLinus Torvalds cda = (char *)((addr_t) ccw->cda); 35201da177e4SLinus Torvalds if (dst != cda) { 35211da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 35227988613bSKent Overstreet memcpy(dst, cda, bv.bv_len); 35231da177e4SLinus Torvalds kmem_cache_free(dasd_page_cache, 35241da177e4SLinus Torvalds (void *)((addr_t)cda & PAGE_MASK)); 35251da177e4SLinus Torvalds } 35261da177e4SLinus Torvalds dst = NULL; 35271da177e4SLinus Torvalds } 35281da177e4SLinus Torvalds ccw++; 35291da177e4SLinus Torvalds recid++; 35301da177e4SLinus Torvalds } 35311da177e4SLinus Torvalds } 35321da177e4SLinus Torvalds out: 35331da177e4SLinus Torvalds status = cqr->status == DASD_CQR_DONE; 35348e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 35351da177e4SLinus Torvalds return status; 35361da177e4SLinus Torvalds } 35371da177e4SLinus Torvalds 35388e09f215SStefan Weinhuber /* 3539f3eb5384SStefan Weinhuber * Modify ccw/tcw in cqr so it can be started on a base device. 35408e09f215SStefan Weinhuber * 35418e09f215SStefan Weinhuber * Note that this is not enough to restart the cqr! 35428e09f215SStefan Weinhuber * Either reset cqr->startdev as well (summary unit check handling) 35438e09f215SStefan Weinhuber * or restart via separate cqr (as in ERP handling). 35448e09f215SStefan Weinhuber */ 35458e09f215SStefan Weinhuber void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 35468e09f215SStefan Weinhuber { 35478e09f215SStefan Weinhuber struct ccw1 *ccw; 35488e09f215SStefan Weinhuber struct PFX_eckd_data *pfxdata; 3549f3eb5384SStefan Weinhuber struct tcw *tcw; 3550f3eb5384SStefan Weinhuber struct tccb *tccb; 3551f3eb5384SStefan Weinhuber struct dcw *dcw; 35528e09f215SStefan Weinhuber 3553f3eb5384SStefan Weinhuber if (cqr->cpmode == 1) { 3554f3eb5384SStefan Weinhuber tcw = cqr->cpaddr; 3555f3eb5384SStefan Weinhuber tccb = tcw_get_tccb(tcw); 3556f3eb5384SStefan Weinhuber dcw = (struct dcw *)&tccb->tca[0]; 3557f3eb5384SStefan Weinhuber pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; 3558f3eb5384SStefan Weinhuber pfxdata->validity.verify_base = 0; 3559f3eb5384SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 3560f3eb5384SStefan Weinhuber } else { 35618e09f215SStefan Weinhuber ccw = cqr->cpaddr; 35628e09f215SStefan Weinhuber pfxdata = cqr->data; 35638e09f215SStefan Weinhuber if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 35648e09f215SStefan Weinhuber pfxdata->validity.verify_base = 0; 35658e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 35668e09f215SStefan Weinhuber } 35678e09f215SStefan Weinhuber } 3568f3eb5384SStefan Weinhuber } 35698e09f215SStefan Weinhuber 35708e09f215SStefan Weinhuber #define DASD_ECKD_CHANQ_MAX_SIZE 4 35718e09f215SStefan Weinhuber 35728e09f215SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 35738e09f215SStefan Weinhuber struct dasd_block *block, 35748e09f215SStefan Weinhuber struct request *req) 35758e09f215SStefan Weinhuber { 35768e09f215SStefan Weinhuber struct dasd_eckd_private *private; 35778e09f215SStefan Weinhuber struct dasd_device *startdev; 35788e09f215SStefan Weinhuber unsigned long flags; 35798e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 35808e09f215SStefan Weinhuber 35818e09f215SStefan Weinhuber startdev = dasd_alias_get_start_dev(base); 35828e09f215SStefan Weinhuber if (!startdev) 35838e09f215SStefan Weinhuber startdev = base; 35848e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) startdev->private; 35858e09f215SStefan Weinhuber if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 35868e09f215SStefan Weinhuber return ERR_PTR(-EBUSY); 35878e09f215SStefan Weinhuber 35888e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 35898e09f215SStefan Weinhuber private->count++; 3590e4dbb0f2SStefan Haberland if ((base->features & DASD_FEATURE_USERAW)) 3591e4dbb0f2SStefan Haberland cqr = dasd_raw_build_cp(startdev, block, req); 3592e4dbb0f2SStefan Haberland else 35938e09f215SStefan Weinhuber cqr = dasd_eckd_build_cp(startdev, block, req); 35948e09f215SStefan Weinhuber if (IS_ERR(cqr)) 35958e09f215SStefan Weinhuber private->count--; 35968e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 35978e09f215SStefan Weinhuber return cqr; 35988e09f215SStefan Weinhuber } 35998e09f215SStefan Weinhuber 36008e09f215SStefan Weinhuber static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 36018e09f215SStefan Weinhuber struct request *req) 36028e09f215SStefan Weinhuber { 36038e09f215SStefan Weinhuber struct dasd_eckd_private *private; 36048e09f215SStefan Weinhuber unsigned long flags; 36058e09f215SStefan Weinhuber 36068e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 36078e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) cqr->memdev->private; 36088e09f215SStefan Weinhuber private->count--; 36098e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 36108e09f215SStefan Weinhuber return dasd_eckd_free_cp(cqr, req); 36118e09f215SStefan Weinhuber } 36128e09f215SStefan Weinhuber 36131da177e4SLinus Torvalds static int 36141da177e4SLinus Torvalds dasd_eckd_fill_info(struct dasd_device * device, 36151da177e4SLinus Torvalds struct dasd_information2_t * info) 36161da177e4SLinus Torvalds { 36171da177e4SLinus Torvalds struct dasd_eckd_private *private; 36181da177e4SLinus Torvalds 36191da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 36201da177e4SLinus Torvalds info->label_block = 2; 36211da177e4SLinus Torvalds info->FBA_layout = private->uses_cdl ? 0 : 1; 36221da177e4SLinus Torvalds info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 36231da177e4SLinus Torvalds info->characteristics_size = sizeof(struct dasd_eckd_characteristics); 36241da177e4SLinus Torvalds memcpy(info->characteristics, &private->rdc_data, 36251da177e4SLinus Torvalds sizeof(struct dasd_eckd_characteristics)); 36264abb08c2SStefan Weinhuber info->confdata_size = min((unsigned long)private->conf_len, 36274abb08c2SStefan Weinhuber sizeof(info->configuration_data)); 36284abb08c2SStefan Weinhuber memcpy(info->configuration_data, private->conf_data, 36294abb08c2SStefan Weinhuber info->confdata_size); 36301da177e4SLinus Torvalds return 0; 36311da177e4SLinus Torvalds } 36321da177e4SLinus Torvalds 36331da177e4SLinus Torvalds /* 36341da177e4SLinus Torvalds * SECTION: ioctl functions for eckd devices. 36351da177e4SLinus Torvalds */ 36361da177e4SLinus Torvalds 36371da177e4SLinus Torvalds /* 36381da177e4SLinus Torvalds * Release device ioctl. 36391da177e4SLinus Torvalds * Buils a channel programm to releases a prior reserved 36401da177e4SLinus Torvalds * (see dasd_eckd_reserve) device. 36411da177e4SLinus Torvalds */ 36421da177e4SLinus Torvalds static int 36431107ccfbSChristoph Hellwig dasd_eckd_release(struct dasd_device *device) 36441da177e4SLinus Torvalds { 36451da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 36461da177e4SLinus Torvalds int rc; 3647f3eb5384SStefan Weinhuber struct ccw1 *ccw; 3648f932bceaSStefan Weinhuber int useglobal; 36491da177e4SLinus Torvalds 36501da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 36511da177e4SLinus Torvalds return -EACCES; 36521da177e4SLinus Torvalds 3653f932bceaSStefan Weinhuber useglobal = 0; 365468b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 36551da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3656f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3657f932bceaSStefan Weinhuber useglobal = 1; 3658f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3659f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3660f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3661f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3662f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3663f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3664f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 36651da177e4SLinus Torvalds } 3666f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 3667f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RELEASE; 3668f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3669f3eb5384SStefan Weinhuber ccw->count = 32; 3670f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 36718e09f215SStefan Weinhuber cqr->startdev = device; 36728e09f215SStefan Weinhuber cqr->memdev = device; 36731da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 36741c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3675336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 36761da177e4SLinus Torvalds cqr->expires = 2 * HZ; 36771aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 36781da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 36791da177e4SLinus Torvalds 36801da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 36815a27e60dSStefan Weinhuber if (!rc) 36825a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 36831da177e4SLinus Torvalds 3684f932bceaSStefan Weinhuber if (useglobal) 3685f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3686f932bceaSStefan Weinhuber else 36878e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 36881da177e4SLinus Torvalds return rc; 36891da177e4SLinus Torvalds } 36901da177e4SLinus Torvalds 36911da177e4SLinus Torvalds /* 36921da177e4SLinus Torvalds * Reserve device ioctl. 36931da177e4SLinus Torvalds * Options are set to 'synchronous wait for interrupt' and 36941da177e4SLinus Torvalds * 'timeout the request'. This leads to a terminate IO if 36951da177e4SLinus Torvalds * the interrupt is outstanding for a certain time. 36961da177e4SLinus Torvalds */ 36971da177e4SLinus Torvalds static int 36981107ccfbSChristoph Hellwig dasd_eckd_reserve(struct dasd_device *device) 36991da177e4SLinus Torvalds { 37001da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 37011da177e4SLinus Torvalds int rc; 3702f3eb5384SStefan Weinhuber struct ccw1 *ccw; 3703f932bceaSStefan Weinhuber int useglobal; 37041da177e4SLinus Torvalds 37051da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 37061da177e4SLinus Torvalds return -EACCES; 37071da177e4SLinus Torvalds 3708f932bceaSStefan Weinhuber useglobal = 0; 370968b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 37101da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3711f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3712f932bceaSStefan Weinhuber useglobal = 1; 3713f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3714f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3715f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3716f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3717f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3718f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3719f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 37201da177e4SLinus Torvalds } 3721f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 3722f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RESERVE; 3723f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3724f3eb5384SStefan Weinhuber ccw->count = 32; 3725f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 37268e09f215SStefan Weinhuber cqr->startdev = device; 37278e09f215SStefan Weinhuber cqr->memdev = device; 37281da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 37291c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3730336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 37311da177e4SLinus Torvalds cqr->expires = 2 * HZ; 37321aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 37331da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 37341da177e4SLinus Torvalds 37351da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 37365a27e60dSStefan Weinhuber if (!rc) 37375a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 37381da177e4SLinus Torvalds 3739f932bceaSStefan Weinhuber if (useglobal) 3740f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3741f932bceaSStefan Weinhuber else 37428e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 37431da177e4SLinus Torvalds return rc; 37441da177e4SLinus Torvalds } 37451da177e4SLinus Torvalds 37461da177e4SLinus Torvalds /* 37471da177e4SLinus Torvalds * Steal lock ioctl - unconditional reserve device. 37481da177e4SLinus Torvalds * Buils a channel programm to break a device's reservation. 37491da177e4SLinus Torvalds * (unconditional reserve) 37501da177e4SLinus Torvalds */ 37511da177e4SLinus Torvalds static int 37521107ccfbSChristoph Hellwig dasd_eckd_steal_lock(struct dasd_device *device) 37531da177e4SLinus Torvalds { 37541da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 37551da177e4SLinus Torvalds int rc; 3756f3eb5384SStefan Weinhuber struct ccw1 *ccw; 3757f932bceaSStefan Weinhuber int useglobal; 37581da177e4SLinus Torvalds 37591da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 37601da177e4SLinus Torvalds return -EACCES; 37611da177e4SLinus Torvalds 3762f932bceaSStefan Weinhuber useglobal = 0; 376368b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 37641da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3765f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3766f932bceaSStefan Weinhuber useglobal = 1; 3767f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3768f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3769f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3770f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3771f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3772f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3773f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 37741da177e4SLinus Torvalds } 3775f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 3776f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SLCK; 3777f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3778f3eb5384SStefan Weinhuber ccw->count = 32; 3779f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 37808e09f215SStefan Weinhuber cqr->startdev = device; 37818e09f215SStefan Weinhuber cqr->memdev = device; 37821da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 37831c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3784336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 37851da177e4SLinus Torvalds cqr->expires = 2 * HZ; 37861aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 37871da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 37881da177e4SLinus Torvalds 37891da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 37905a27e60dSStefan Weinhuber if (!rc) 37915a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 37921da177e4SLinus Torvalds 3793f932bceaSStefan Weinhuber if (useglobal) 3794f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3795f932bceaSStefan Weinhuber else 37968e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 37971da177e4SLinus Torvalds return rc; 37981da177e4SLinus Torvalds } 37991da177e4SLinus Torvalds 38001da177e4SLinus Torvalds /* 3801196339f1SStefan Weinhuber * SNID - Sense Path Group ID 3802196339f1SStefan Weinhuber * This ioctl may be used in situations where I/O is stalled due to 3803196339f1SStefan Weinhuber * a reserve, so if the normal dasd_smalloc_request fails, we use the 3804196339f1SStefan Weinhuber * preallocated dasd_reserve_req. 3805196339f1SStefan Weinhuber */ 3806196339f1SStefan Weinhuber static int dasd_eckd_snid(struct dasd_device *device, 3807196339f1SStefan Weinhuber void __user *argp) 3808196339f1SStefan Weinhuber { 3809196339f1SStefan Weinhuber struct dasd_ccw_req *cqr; 3810196339f1SStefan Weinhuber int rc; 3811196339f1SStefan Weinhuber struct ccw1 *ccw; 3812196339f1SStefan Weinhuber int useglobal; 3813196339f1SStefan Weinhuber struct dasd_snid_ioctl_data usrparm; 3814196339f1SStefan Weinhuber 3815196339f1SStefan Weinhuber if (!capable(CAP_SYS_ADMIN)) 3816196339f1SStefan Weinhuber return -EACCES; 3817196339f1SStefan Weinhuber 3818196339f1SStefan Weinhuber if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 3819196339f1SStefan Weinhuber return -EFAULT; 3820196339f1SStefan Weinhuber 3821196339f1SStefan Weinhuber useglobal = 0; 3822196339f1SStefan Weinhuber cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 3823196339f1SStefan Weinhuber sizeof(struct dasd_snid_data), device); 3824196339f1SStefan Weinhuber if (IS_ERR(cqr)) { 3825196339f1SStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3826196339f1SStefan Weinhuber useglobal = 1; 3827196339f1SStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3828196339f1SStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3829196339f1SStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3830196339f1SStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3831196339f1SStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3832196339f1SStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3833196339f1SStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 3834196339f1SStefan Weinhuber } 3835196339f1SStefan Weinhuber ccw = cqr->cpaddr; 3836196339f1SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SNID; 3837196339f1SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3838196339f1SStefan Weinhuber ccw->count = 12; 3839196339f1SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 3840196339f1SStefan Weinhuber cqr->startdev = device; 3841196339f1SStefan Weinhuber cqr->memdev = device; 3842196339f1SStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3843196339f1SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 38445a27e60dSStefan Weinhuber set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 3845196339f1SStefan Weinhuber cqr->retries = 5; 3846196339f1SStefan Weinhuber cqr->expires = 10 * HZ; 38471aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 3848196339f1SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 3849196339f1SStefan Weinhuber cqr->lpm = usrparm.path_mask; 3850196339f1SStefan Weinhuber 3851196339f1SStefan Weinhuber rc = dasd_sleep_on_immediatly(cqr); 3852196339f1SStefan Weinhuber /* verify that I/O processing didn't modify the path mask */ 3853196339f1SStefan Weinhuber if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) 3854196339f1SStefan Weinhuber rc = -EIO; 3855196339f1SStefan Weinhuber if (!rc) { 3856196339f1SStefan Weinhuber usrparm.data = *((struct dasd_snid_data *)cqr->data); 3857196339f1SStefan Weinhuber if (copy_to_user(argp, &usrparm, sizeof(usrparm))) 3858196339f1SStefan Weinhuber rc = -EFAULT; 3859196339f1SStefan Weinhuber } 3860196339f1SStefan Weinhuber 3861196339f1SStefan Weinhuber if (useglobal) 3862196339f1SStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3863196339f1SStefan Weinhuber else 3864196339f1SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 3865196339f1SStefan Weinhuber return rc; 3866196339f1SStefan Weinhuber } 3867196339f1SStefan Weinhuber 3868196339f1SStefan Weinhuber /* 38691da177e4SLinus Torvalds * Read performance statistics 38701da177e4SLinus Torvalds */ 38711da177e4SLinus Torvalds static int 38721107ccfbSChristoph Hellwig dasd_eckd_performance(struct dasd_device *device, void __user *argp) 38731da177e4SLinus Torvalds { 38741da177e4SLinus Torvalds struct dasd_psf_prssd_data *prssdp; 38751da177e4SLinus Torvalds struct dasd_rssd_perf_stats_t *stats; 38761da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 38771da177e4SLinus Torvalds struct ccw1 *ccw; 38781da177e4SLinus Torvalds int rc; 38791da177e4SLinus Torvalds 388068b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 38811da177e4SLinus Torvalds (sizeof(struct dasd_psf_prssd_data) + 38821da177e4SLinus Torvalds sizeof(struct dasd_rssd_perf_stats_t)), 38831da177e4SLinus Torvalds device); 38841da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3885fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 38861da177e4SLinus Torvalds "Could not allocate initialization request"); 38871da177e4SLinus Torvalds return PTR_ERR(cqr); 38881da177e4SLinus Torvalds } 38898e09f215SStefan Weinhuber cqr->startdev = device; 38908e09f215SStefan Weinhuber cqr->memdev = device; 38911da177e4SLinus Torvalds cqr->retries = 0; 3892eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 38931da177e4SLinus Torvalds cqr->expires = 10 * HZ; 38941da177e4SLinus Torvalds 38951da177e4SLinus Torvalds /* Prepare for Read Subsystem Data */ 38961da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 38971da177e4SLinus Torvalds memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 38981da177e4SLinus Torvalds prssdp->order = PSF_ORDER_PRSSD; 38995d67d164SJoe Perches prssdp->suborder = 0x01; /* Performance Statistics */ 39001da177e4SLinus Torvalds prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 39011da177e4SLinus Torvalds 39021da177e4SLinus Torvalds ccw = cqr->cpaddr; 39031da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_PSF; 39041da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_psf_prssd_data); 39051da177e4SLinus Torvalds ccw->flags |= CCW_FLAG_CC; 39061da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) prssdp; 39071da177e4SLinus Torvalds 39081da177e4SLinus Torvalds /* Read Subsystem Data - Performance Statistics */ 39091da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 39101da177e4SLinus Torvalds memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 39111da177e4SLinus Torvalds 39121da177e4SLinus Torvalds ccw++; 39131da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_RSSD; 39141da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 39151da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) stats; 39161da177e4SLinus Torvalds 39171aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 39181da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 39191da177e4SLinus Torvalds rc = dasd_sleep_on(cqr); 39201da177e4SLinus Torvalds if (rc == 0) { 39211da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 39221da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 39231107ccfbSChristoph Hellwig if (copy_to_user(argp, stats, 39241107ccfbSChristoph Hellwig sizeof(struct dasd_rssd_perf_stats_t))) 39251107ccfbSChristoph Hellwig rc = -EFAULT; 39261da177e4SLinus Torvalds } 39278e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 39281da177e4SLinus Torvalds return rc; 39291da177e4SLinus Torvalds } 39301da177e4SLinus Torvalds 39311da177e4SLinus Torvalds /* 39321da177e4SLinus Torvalds * Get attributes (cache operations) 39331da177e4SLinus Torvalds * Returnes the cache attributes used in Define Extend (DE). 39341da177e4SLinus Torvalds */ 39351da177e4SLinus Torvalds static int 39361107ccfbSChristoph Hellwig dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 39371da177e4SLinus Torvalds { 39381107ccfbSChristoph Hellwig struct dasd_eckd_private *private = 39391107ccfbSChristoph Hellwig (struct dasd_eckd_private *)device->private; 39401107ccfbSChristoph Hellwig struct attrib_data_t attrib = private->attrib; 39411da177e4SLinus Torvalds int rc; 39421da177e4SLinus Torvalds 39431da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 39441da177e4SLinus Torvalds return -EACCES; 39451107ccfbSChristoph Hellwig if (!argp) 39461da177e4SLinus Torvalds return -EINVAL; 39471da177e4SLinus Torvalds 39481107ccfbSChristoph Hellwig rc = 0; 39491107ccfbSChristoph Hellwig if (copy_to_user(argp, (long *) &attrib, 39501107ccfbSChristoph Hellwig sizeof(struct attrib_data_t))) 39511107ccfbSChristoph Hellwig rc = -EFAULT; 39521da177e4SLinus Torvalds 39531da177e4SLinus Torvalds return rc; 39541da177e4SLinus Torvalds } 39551da177e4SLinus Torvalds 39561da177e4SLinus Torvalds /* 39571da177e4SLinus Torvalds * Set attributes (cache operations) 39581da177e4SLinus Torvalds * Stores the attributes for cache operation to be used in Define Extend (DE). 39591da177e4SLinus Torvalds */ 39601da177e4SLinus Torvalds static int 39611107ccfbSChristoph Hellwig dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 39621da177e4SLinus Torvalds { 39631107ccfbSChristoph Hellwig struct dasd_eckd_private *private = 39641107ccfbSChristoph Hellwig (struct dasd_eckd_private *)device->private; 39651da177e4SLinus Torvalds struct attrib_data_t attrib; 39661da177e4SLinus Torvalds 39671da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 39681da177e4SLinus Torvalds return -EACCES; 39691107ccfbSChristoph Hellwig if (!argp) 39701da177e4SLinus Torvalds return -EINVAL; 39711da177e4SLinus Torvalds 39721107ccfbSChristoph Hellwig if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 39731da177e4SLinus Torvalds return -EFAULT; 39741da177e4SLinus Torvalds private->attrib = attrib; 39751da177e4SLinus Torvalds 3976fc19f381SStefan Haberland dev_info(&device->cdev->dev, 3977fc19f381SStefan Haberland "The DASD cache mode was set to %x (%i cylinder prestage)\n", 39781da177e4SLinus Torvalds private->attrib.operation, private->attrib.nr_cyl); 39791da177e4SLinus Torvalds return 0; 39801da177e4SLinus Torvalds } 39811da177e4SLinus Torvalds 3982ab1d848fSNigel Hislop /* 3983ab1d848fSNigel Hislop * Issue syscall I/O to EMC Symmetrix array. 3984ab1d848fSNigel Hislop * CCWs are PSF and RSSD 3985ab1d848fSNigel Hislop */ 3986ab1d848fSNigel Hislop static int dasd_symm_io(struct dasd_device *device, void __user *argp) 3987ab1d848fSNigel Hislop { 3988ab1d848fSNigel Hislop struct dasd_symmio_parms usrparm; 3989ab1d848fSNigel Hislop char *psf_data, *rssd_result; 3990ab1d848fSNigel Hislop struct dasd_ccw_req *cqr; 3991ab1d848fSNigel Hislop struct ccw1 *ccw; 399252898025SNigel Hislop char psf0, psf1; 3993ab1d848fSNigel Hislop int rc; 3994ab1d848fSNigel Hislop 399552898025SNigel Hislop if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) 399652898025SNigel Hislop return -EACCES; 399752898025SNigel Hislop psf0 = psf1 = 0; 399852898025SNigel Hislop 3999ab1d848fSNigel Hislop /* Copy parms from caller */ 4000ab1d848fSNigel Hislop rc = -EFAULT; 4001ab1d848fSNigel Hislop if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 4002ab1d848fSNigel Hislop goto out; 400392d62891SHeiko Carstens if (is_compat_task()) { 4004ab1d848fSNigel Hislop /* Make sure pointers are sane even on 31 bit. */ 4005ab1d848fSNigel Hislop rc = -EINVAL; 4006f8b06859SHeiko Carstens if ((usrparm.psf_data >> 32) != 0) 4007ab1d848fSNigel Hislop goto out; 4008f8b06859SHeiko Carstens if ((usrparm.rssd_result >> 32) != 0) 4009f8b06859SHeiko Carstens goto out; 4010f8b06859SHeiko Carstens usrparm.psf_data &= 0x7fffffffULL; 4011f8b06859SHeiko Carstens usrparm.rssd_result &= 0x7fffffffULL; 4012ab1d848fSNigel Hislop } 4013ab1d848fSNigel Hislop /* alloc I/O data area */ 4014ab1d848fSNigel Hislop psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 4015ab1d848fSNigel Hislop rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 4016ab1d848fSNigel Hislop if (!psf_data || !rssd_result) { 4017ab1d848fSNigel Hislop rc = -ENOMEM; 4018ab1d848fSNigel Hislop goto out_free; 4019ab1d848fSNigel Hislop } 4020ab1d848fSNigel Hislop 4021ab1d848fSNigel Hislop /* get syscall header from user space */ 4022ab1d848fSNigel Hislop rc = -EFAULT; 4023ab1d848fSNigel Hislop if (copy_from_user(psf_data, 4024ab1d848fSNigel Hislop (void __user *)(unsigned long) usrparm.psf_data, 4025ab1d848fSNigel Hislop usrparm.psf_data_len)) 4026ab1d848fSNigel Hislop goto out_free; 402752898025SNigel Hislop psf0 = psf_data[0]; 402852898025SNigel Hislop psf1 = psf_data[1]; 4029ab1d848fSNigel Hislop 4030ab1d848fSNigel Hislop /* setup CCWs for PSF + RSSD */ 403168b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device); 4032ab1d848fSNigel Hislop if (IS_ERR(cqr)) { 4033fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 4034ab1d848fSNigel Hislop "Could not allocate initialization request"); 4035ab1d848fSNigel Hislop rc = PTR_ERR(cqr); 4036ab1d848fSNigel Hislop goto out_free; 4037ab1d848fSNigel Hislop } 4038ab1d848fSNigel Hislop 4039ab1d848fSNigel Hislop cqr->startdev = device; 4040ab1d848fSNigel Hislop cqr->memdev = device; 4041ab1d848fSNigel Hislop cqr->retries = 3; 4042ab1d848fSNigel Hislop cqr->expires = 10 * HZ; 40431aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 4044ab1d848fSNigel Hislop cqr->status = DASD_CQR_FILLED; 4045ab1d848fSNigel Hislop 4046ab1d848fSNigel Hislop /* Build the ccws */ 4047ab1d848fSNigel Hislop ccw = cqr->cpaddr; 4048ab1d848fSNigel Hislop 4049ab1d848fSNigel Hislop /* PSF ccw */ 4050ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_PSF; 4051ab1d848fSNigel Hislop ccw->count = usrparm.psf_data_len; 4052ab1d848fSNigel Hislop ccw->flags |= CCW_FLAG_CC; 4053ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) psf_data; 4054ab1d848fSNigel Hislop 4055ab1d848fSNigel Hislop ccw++; 4056ab1d848fSNigel Hislop 4057ab1d848fSNigel Hislop /* RSSD ccw */ 4058ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_RSSD; 4059ab1d848fSNigel Hislop ccw->count = usrparm.rssd_result_len; 4060ab1d848fSNigel Hislop ccw->flags = CCW_FLAG_SLI ; 4061ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) rssd_result; 4062ab1d848fSNigel Hislop 4063ab1d848fSNigel Hislop rc = dasd_sleep_on(cqr); 4064ab1d848fSNigel Hislop if (rc) 4065ab1d848fSNigel Hislop goto out_sfree; 4066ab1d848fSNigel Hislop 4067ab1d848fSNigel Hislop rc = -EFAULT; 4068ab1d848fSNigel Hislop if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 4069ab1d848fSNigel Hislop rssd_result, usrparm.rssd_result_len)) 4070ab1d848fSNigel Hislop goto out_sfree; 4071ab1d848fSNigel Hislop rc = 0; 4072ab1d848fSNigel Hislop 4073ab1d848fSNigel Hislop out_sfree: 4074ab1d848fSNigel Hislop dasd_sfree_request(cqr, cqr->memdev); 4075ab1d848fSNigel Hislop out_free: 4076ab1d848fSNigel Hislop kfree(rssd_result); 4077ab1d848fSNigel Hislop kfree(psf_data); 4078ab1d848fSNigel Hislop out: 407952898025SNigel Hislop DBF_DEV_EVENT(DBF_WARNING, device, 408052898025SNigel Hislop "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", 408152898025SNigel Hislop (int) psf0, (int) psf1, rc); 4082ab1d848fSNigel Hislop return rc; 4083ab1d848fSNigel Hislop } 4084ab1d848fSNigel Hislop 40851107ccfbSChristoph Hellwig static int 40868e09f215SStefan Weinhuber dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 40871107ccfbSChristoph Hellwig { 40888e09f215SStefan Weinhuber struct dasd_device *device = block->base; 40898e09f215SStefan Weinhuber 40901107ccfbSChristoph Hellwig switch (cmd) { 40911107ccfbSChristoph Hellwig case BIODASDGATTR: 40921107ccfbSChristoph Hellwig return dasd_eckd_get_attrib(device, argp); 40931107ccfbSChristoph Hellwig case BIODASDSATTR: 40941107ccfbSChristoph Hellwig return dasd_eckd_set_attrib(device, argp); 40951107ccfbSChristoph Hellwig case BIODASDPSRD: 40961107ccfbSChristoph Hellwig return dasd_eckd_performance(device, argp); 40971107ccfbSChristoph Hellwig case BIODASDRLSE: 40981107ccfbSChristoph Hellwig return dasd_eckd_release(device); 40991107ccfbSChristoph Hellwig case BIODASDRSRV: 41001107ccfbSChristoph Hellwig return dasd_eckd_reserve(device); 41011107ccfbSChristoph Hellwig case BIODASDSLCK: 41021107ccfbSChristoph Hellwig return dasd_eckd_steal_lock(device); 4103196339f1SStefan Weinhuber case BIODASDSNID: 4104196339f1SStefan Weinhuber return dasd_eckd_snid(device, argp); 4105ab1d848fSNigel Hislop case BIODASDSYMMIO: 4106ab1d848fSNigel Hislop return dasd_symm_io(device, argp); 41071107ccfbSChristoph Hellwig default: 41086b79d14eSHeiko Carstens return -ENOTTY; 41091107ccfbSChristoph Hellwig } 41101107ccfbSChristoph Hellwig } 41111107ccfbSChristoph Hellwig 41121da177e4SLinus Torvalds /* 4113445b5b49SHorst Hummel * Dump the range of CCWs into 'page' buffer 4114445b5b49SHorst Hummel * and return number of printed chars. 4115445b5b49SHorst Hummel */ 41164d284cacSHeiko Carstens static int 4117445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 4118445b5b49SHorst Hummel { 4119445b5b49SHorst Hummel int len, count; 4120445b5b49SHorst Hummel char *datap; 4121445b5b49SHorst Hummel 4122445b5b49SHorst Hummel len = 0; 4123445b5b49SHorst Hummel while (from <= to) { 4124773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4125445b5b49SHorst Hummel " CCW %p: %08X %08X DAT:", 4126445b5b49SHorst Hummel from, ((int *) from)[0], ((int *) from)[1]); 4127445b5b49SHorst Hummel 4128445b5b49SHorst Hummel /* get pointer to data (consider IDALs) */ 4129445b5b49SHorst Hummel if (from->flags & CCW_FLAG_IDA) 4130445b5b49SHorst Hummel datap = (char *) *((addr_t *) (addr_t) from->cda); 4131445b5b49SHorst Hummel else 4132445b5b49SHorst Hummel datap = (char *) ((addr_t) from->cda); 4133445b5b49SHorst Hummel 4134445b5b49SHorst Hummel /* dump data (max 32 bytes) */ 4135445b5b49SHorst Hummel for (count = 0; count < from->count && count < 32; count++) { 4136445b5b49SHorst Hummel if (count % 8 == 0) len += sprintf(page + len, " "); 4137445b5b49SHorst Hummel if (count % 4 == 0) len += sprintf(page + len, " "); 4138445b5b49SHorst Hummel len += sprintf(page + len, "%02x", datap[count]); 4139445b5b49SHorst Hummel } 4140445b5b49SHorst Hummel len += sprintf(page + len, "\n"); 4141445b5b49SHorst Hummel from++; 4142445b5b49SHorst Hummel } 4143445b5b49SHorst Hummel return len; 4144445b5b49SHorst Hummel } 4145445b5b49SHorst Hummel 4146fc19f381SStefan Haberland static void 4147aeec92caSStefan Haberland dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 4148aeec92caSStefan Haberland char *reason) 4149fc19f381SStefan Haberland { 4150fc19f381SStefan Haberland u64 *sense; 4151a5a0061fSStefan Weinhuber u64 *stat; 4152fc19f381SStefan Haberland 4153aeec92caSStefan Haberland sense = (u64 *) dasd_get_sense(irb); 4154a5a0061fSStefan Weinhuber stat = (u64 *) &irb->scsw; 4155fc19f381SStefan Haberland if (sense) { 4156a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " 4157a5a0061fSStefan Weinhuber "%016llx %016llx %016llx %016llx", 4158a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 4159ed3640b2SStefan Haberland sense[0], sense[1], sense[2], sense[3]); 4160fc19f381SStefan Haberland } else { 4161a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", 4162a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 4163a5a0061fSStefan Weinhuber "NO VALID SENSE"); 4164fc19f381SStefan Haberland } 4165fc19f381SStefan Haberland } 4166fc19f381SStefan Haberland 4167445b5b49SHorst Hummel /* 41681da177e4SLinus Torvalds * Print sense data and related channel program. 41691da177e4SLinus Torvalds * Parts are printed because printk buffer is only 1024 bytes. 41701da177e4SLinus Torvalds */ 4171f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 41728e09f215SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 41731da177e4SLinus Torvalds { 41741da177e4SLinus Torvalds char *page; 4175445b5b49SHorst Hummel struct ccw1 *first, *last, *fail, *from, *to; 4176445b5b49SHorst Hummel int len, sl, sct; 41771da177e4SLinus Torvalds 41781da177e4SLinus Torvalds page = (char *) get_zeroed_page(GFP_ATOMIC); 41791da177e4SLinus Torvalds if (page == NULL) { 4180fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 4181fc19f381SStefan Haberland "No memory to dump sense data\n"); 41821da177e4SLinus Torvalds return; 41831da177e4SLinus Torvalds } 4184445b5b49SHorst Hummel /* dump the sense data */ 4185773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 41861da177e4SLinus Torvalds " I/O status report for device %s:\n", 41872a0217d5SKay Sievers dev_name(&device->cdev->dev)); 4188773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4189a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 4190a5a0061fSStefan Weinhuber "CS:%02X RC:%d\n", 4191a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 4192a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 4193a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 4194a5a0061fSStefan Weinhuber req ? req->intrc : 0); 4195773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 41961da177e4SLinus Torvalds " device %s: Failing CCW: %p\n", 41972a0217d5SKay Sievers dev_name(&device->cdev->dev), 419823d805b6SPeter Oberparleiter (void *) (addr_t) irb->scsw.cmd.cpa); 41991da177e4SLinus Torvalds if (irb->esw.esw0.erw.cons) { 42001da177e4SLinus Torvalds for (sl = 0; sl < 4; sl++) { 4201773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 42021da177e4SLinus Torvalds " Sense(hex) %2d-%2d:", 42031da177e4SLinus Torvalds (8 * sl), ((8 * sl) + 7)); 42041da177e4SLinus Torvalds 42051da177e4SLinus Torvalds for (sct = 0; sct < 8; sct++) { 42061da177e4SLinus Torvalds len += sprintf(page + len, " %02x", 42071da177e4SLinus Torvalds irb->ecw[8 * sl + sct]); 42081da177e4SLinus Torvalds } 42091da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 42101da177e4SLinus Torvalds } 42111da177e4SLinus Torvalds 42121da177e4SLinus Torvalds if (irb->ecw[27] & DASD_SENSE_BIT_0) { 42131da177e4SLinus Torvalds /* 24 Byte Sense Data */ 4214773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 42151da177e4SLinus Torvalds " 24 Byte: %x MSG %x, " 42161da177e4SLinus Torvalds "%s MSGb to SYSOP\n", 42171da177e4SLinus Torvalds irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 42181da177e4SLinus Torvalds irb->ecw[1] & 0x10 ? "" : "no"); 42191da177e4SLinus Torvalds } else { 42201da177e4SLinus Torvalds /* 32 Byte Sense Data */ 4221773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 42221da177e4SLinus Torvalds " 32 Byte: Format: %x " 42231da177e4SLinus Torvalds "Exception class %x\n", 42241da177e4SLinus Torvalds irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 42251da177e4SLinus Torvalds } 42261da177e4SLinus Torvalds } else { 4227773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 42281da177e4SLinus Torvalds " SORRY - NO VALID SENSE AVAILABLE\n"); 42291da177e4SLinus Torvalds } 4230773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 42311da177e4SLinus Torvalds 42328e09f215SStefan Weinhuber if (req) { 42338e09f215SStefan Weinhuber /* req == NULL for unsolicited interrupts */ 4234445b5b49SHorst Hummel /* dump the Channel Program (max 140 Bytes per line) */ 4235445b5b49SHorst Hummel /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 4236445b5b49SHorst Hummel first = req->cpaddr; 4237445b5b49SHorst Hummel for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 4238445b5b49SHorst Hummel to = min(first + 6, last); 4239773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 42401da177e4SLinus Torvalds " Related CP in req: %p\n", req); 4241445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(first, to, page + len); 4242773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 42431da177e4SLinus Torvalds 4244445b5b49SHorst Hummel /* print failing CCW area (maximum 4) */ 4245445b5b49SHorst Hummel /* scsw->cda is either valid or zero */ 42461da177e4SLinus Torvalds len = 0; 4247445b5b49SHorst Hummel from = ++to; 424823d805b6SPeter Oberparleiter fail = (struct ccw1 *)(addr_t) 424923d805b6SPeter Oberparleiter irb->scsw.cmd.cpa; /* failing CCW */ 4250445b5b49SHorst Hummel if (from < fail - 2) { 4251445b5b49SHorst Hummel from = fail - 2; /* there is a gap - print header */ 4252773bab4aSSebastian Ott len += sprintf(page, PRINTK_HEADER "......\n"); 42531da177e4SLinus Torvalds } 4254445b5b49SHorst Hummel to = min(fail + 1, last); 4255445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, to, page + len); 42561da177e4SLinus Torvalds 4257445b5b49SHorst Hummel /* print last CCWs (maximum 2) */ 4258445b5b49SHorst Hummel from = max(from, ++to); 4259445b5b49SHorst Hummel if (from < last - 1) { 4260445b5b49SHorst Hummel from = last - 1; /* there is a gap - print header */ 4261773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER "......\n"); 42621da177e4SLinus Torvalds } 4263445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, last, page + len); 42641da177e4SLinus Torvalds if (len > 0) 4265773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 42668e09f215SStefan Weinhuber } 42671da177e4SLinus Torvalds free_page((unsigned long) page); 42681da177e4SLinus Torvalds } 42691da177e4SLinus Torvalds 4270f3eb5384SStefan Weinhuber 4271f3eb5384SStefan Weinhuber /* 4272f3eb5384SStefan Weinhuber * Print sense data from a tcw. 4273f3eb5384SStefan Weinhuber */ 4274f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 4275f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 4276f3eb5384SStefan Weinhuber { 4277f3eb5384SStefan Weinhuber char *page; 4278f3eb5384SStefan Weinhuber int len, sl, sct, residual; 4279f3eb5384SStefan Weinhuber struct tsb *tsb; 4280ef19298bSStefan Weinhuber u8 *sense, *rcq; 4281f3eb5384SStefan Weinhuber 4282f3eb5384SStefan Weinhuber page = (char *) get_zeroed_page(GFP_ATOMIC); 4283f3eb5384SStefan Weinhuber if (page == NULL) { 4284fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, " %s", 4285f3eb5384SStefan Weinhuber "No memory to dump sense data"); 4286f3eb5384SStefan Weinhuber return; 4287f3eb5384SStefan Weinhuber } 4288f3eb5384SStefan Weinhuber /* dump the sense data */ 4289773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 4290f3eb5384SStefan Weinhuber " I/O status report for device %s:\n", 4291f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev)); 4292773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4293a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 4294a5a0061fSStefan Weinhuber "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", 4295a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 4296a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 4297a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 4298a5a0061fSStefan Weinhuber irb->scsw.tm.fcxs, irb->scsw.tm.schxs, 4299a5a0061fSStefan Weinhuber req ? req->intrc : 0); 4300773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4301f3eb5384SStefan Weinhuber " device %s: Failing TCW: %p\n", 4302f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev), 4303f3eb5384SStefan Weinhuber (void *) (addr_t) irb->scsw.tm.tcw); 4304f3eb5384SStefan Weinhuber 4305f3eb5384SStefan Weinhuber tsb = NULL; 4306f3eb5384SStefan Weinhuber sense = NULL; 4307a5a0061fSStefan Weinhuber if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) 4308f3eb5384SStefan Weinhuber tsb = tcw_get_tsb( 4309f3eb5384SStefan Weinhuber (struct tcw *)(unsigned long)irb->scsw.tm.tcw); 4310f3eb5384SStefan Weinhuber 4311b8fde722SStefan Haberland if (tsb) { 4312773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4313f3eb5384SStefan Weinhuber " tsb->length %d\n", tsb->length); 4314773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4315f3eb5384SStefan Weinhuber " tsb->flags %x\n", tsb->flags); 4316773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4317f3eb5384SStefan Weinhuber " tsb->dcw_offset %d\n", tsb->dcw_offset); 4318773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4319f3eb5384SStefan Weinhuber " tsb->count %d\n", tsb->count); 4320f3eb5384SStefan Weinhuber residual = tsb->count - 28; 4321773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4322f3eb5384SStefan Weinhuber " residual %d\n", residual); 4323f3eb5384SStefan Weinhuber 4324f3eb5384SStefan Weinhuber switch (tsb->flags & 0x07) { 4325f3eb5384SStefan Weinhuber case 1: /* tsa_iostat */ 4326773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4327f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_time %d\n", 4328f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_time); 4329773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4330f3eb5384SStefan Weinhuber " tsb->tsa.iostat.def_time %d\n", 4331f3eb5384SStefan Weinhuber tsb->tsa.iostat.def_time); 4332773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4333f3eb5384SStefan Weinhuber " tsb->tsa.iostat.queue_time %d\n", 4334f3eb5384SStefan Weinhuber tsb->tsa.iostat.queue_time); 4335773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4336f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_busy_time %d\n", 4337f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_busy_time); 4338773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4339f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_act_time %d\n", 4340f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_act_time); 4341f3eb5384SStefan Weinhuber sense = tsb->tsa.iostat.sense; 4342f3eb5384SStefan Weinhuber break; 4343f3eb5384SStefan Weinhuber case 2: /* ts_ddpc */ 4344773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4345f3eb5384SStefan Weinhuber " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); 4346ef19298bSStefan Weinhuber for (sl = 0; sl < 2; sl++) { 4347773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4348ef19298bSStefan Weinhuber " tsb->tsa.ddpc.rcq %2d-%2d: ", 4349ef19298bSStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 4350ef19298bSStefan Weinhuber rcq = tsb->tsa.ddpc.rcq; 4351f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 4352f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 4353ef19298bSStefan Weinhuber rcq[8 * sl + sct]); 4354f3eb5384SStefan Weinhuber } 4355f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 4356f3eb5384SStefan Weinhuber } 4357f3eb5384SStefan Weinhuber sense = tsb->tsa.ddpc.sense; 4358f3eb5384SStefan Weinhuber break; 4359f3eb5384SStefan Weinhuber case 3: /* tsa_intrg */ 4360773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4361f3eb5384SStefan Weinhuber " tsb->tsa.intrg.: not supportet yet\n"); 4362f3eb5384SStefan Weinhuber break; 4363f3eb5384SStefan Weinhuber } 4364f3eb5384SStefan Weinhuber 4365f3eb5384SStefan Weinhuber if (sense) { 4366f3eb5384SStefan Weinhuber for (sl = 0; sl < 4; sl++) { 4367773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4368f3eb5384SStefan Weinhuber " Sense(hex) %2d-%2d:", 4369f3eb5384SStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 4370f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 4371f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 4372f3eb5384SStefan Weinhuber sense[8 * sl + sct]); 4373f3eb5384SStefan Weinhuber } 4374f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 4375f3eb5384SStefan Weinhuber } 4376f3eb5384SStefan Weinhuber 4377f3eb5384SStefan Weinhuber if (sense[27] & DASD_SENSE_BIT_0) { 4378f3eb5384SStefan Weinhuber /* 24 Byte Sense Data */ 4379773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4380f3eb5384SStefan Weinhuber " 24 Byte: %x MSG %x, " 4381f3eb5384SStefan Weinhuber "%s MSGb to SYSOP\n", 4382f3eb5384SStefan Weinhuber sense[7] >> 4, sense[7] & 0x0f, 4383f3eb5384SStefan Weinhuber sense[1] & 0x10 ? "" : "no"); 4384f3eb5384SStefan Weinhuber } else { 4385f3eb5384SStefan Weinhuber /* 32 Byte Sense Data */ 4386773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4387f3eb5384SStefan Weinhuber " 32 Byte: Format: %x " 4388f3eb5384SStefan Weinhuber "Exception class %x\n", 4389f3eb5384SStefan Weinhuber sense[6] & 0x0f, sense[22] >> 4); 4390f3eb5384SStefan Weinhuber } 4391f3eb5384SStefan Weinhuber } else { 4392773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4393f3eb5384SStefan Weinhuber " SORRY - NO VALID SENSE AVAILABLE\n"); 4394f3eb5384SStefan Weinhuber } 4395f3eb5384SStefan Weinhuber } else { 4396773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4397f3eb5384SStefan Weinhuber " SORRY - NO TSB DATA AVAILABLE\n"); 4398f3eb5384SStefan Weinhuber } 4399773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 4400f3eb5384SStefan Weinhuber free_page((unsigned long) page); 4401f3eb5384SStefan Weinhuber } 4402f3eb5384SStefan Weinhuber 4403f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense(struct dasd_device *device, 4404f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 4405f3eb5384SStefan Weinhuber { 4406a5a0061fSStefan Weinhuber if (scsw_is_tm(&irb->scsw)) 4407f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_tcw(device, req, irb); 4408f3eb5384SStefan Weinhuber else 4409f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_ccw(device, req, irb); 4410f3eb5384SStefan Weinhuber } 4411f3eb5384SStefan Weinhuber 4412501183f2SStefan Haberland static int dasd_eckd_pm_freeze(struct dasd_device *device) 4413d41dd122SStefan Haberland { 4414d41dd122SStefan Haberland /* 4415d41dd122SStefan Haberland * the device should be disconnected from our LCU structure 4416d41dd122SStefan Haberland * on restore we will reconnect it and reread LCU specific 4417d41dd122SStefan Haberland * information like PAV support that might have changed 4418d41dd122SStefan Haberland */ 4419d41dd122SStefan Haberland dasd_alias_remove_device(device); 4420d41dd122SStefan Haberland dasd_alias_disconnect_device_from_lcu(device); 4421d41dd122SStefan Haberland 4422d41dd122SStefan Haberland return 0; 4423d41dd122SStefan Haberland } 4424d41dd122SStefan Haberland 4425501183f2SStefan Haberland static int dasd_eckd_restore_device(struct dasd_device *device) 4426d41dd122SStefan Haberland { 4427d41dd122SStefan Haberland struct dasd_eckd_private *private; 44286fca97a9SStefan Haberland struct dasd_eckd_characteristics temp_rdc_data; 4429f9f8d02fSStefan Haberland int rc; 4430d41dd122SStefan Haberland struct dasd_uid temp_uid; 4431a7602f6cSStefan Haberland unsigned long flags; 4432ea4da6eaSStefan Haberland unsigned long cqr_flags = 0; 4433d41dd122SStefan Haberland 4434d41dd122SStefan Haberland private = (struct dasd_eckd_private *) device->private; 4435d41dd122SStefan Haberland 4436d41dd122SStefan Haberland /* Read Configuration Data */ 4437251afd69SStefan Haberland rc = dasd_eckd_read_conf(device); 4438251afd69SStefan Haberland if (rc) { 4439251afd69SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 4440251afd69SStefan Haberland "Read configuration data failed, rc=%d", rc); 4441251afd69SStefan Haberland goto out_err; 4442251afd69SStefan Haberland } 4443d41dd122SStefan Haberland 44442dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 44452dedf0d9SStefan Haberland /* Generate device unique id */ 44462dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 44472dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4448d41dd122SStefan Haberland if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) 4449a7602f6cSStefan Haberland dev_err(&device->cdev->dev, "The UID of the DASD has " 4450a7602f6cSStefan Haberland "changed\n"); 44512dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4452d41dd122SStefan Haberland if (rc) 4453d41dd122SStefan Haberland goto out_err; 4454d41dd122SStefan Haberland 4455d41dd122SStefan Haberland /* register lcu with alias handling, enable PAV if this is a new lcu */ 4456f9f8d02fSStefan Haberland rc = dasd_alias_make_device_known_to_lcu(device); 4457f9f8d02fSStefan Haberland if (rc) 4458251afd69SStefan Haberland goto out_err; 4459ea4da6eaSStefan Haberland 4460ea4da6eaSStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr_flags); 4461ea4da6eaSStefan Haberland dasd_eckd_validate_server(device, cqr_flags); 4462f4ac1d02SStefan Weinhuber 4463f4ac1d02SStefan Weinhuber /* RE-Read Configuration Data */ 4464251afd69SStefan Haberland rc = dasd_eckd_read_conf(device); 4465251afd69SStefan Haberland if (rc) { 4466251afd69SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 4467251afd69SStefan Haberland "Read configuration data failed, rc=%d", rc); 4468251afd69SStefan Haberland goto out_err2; 4469251afd69SStefan Haberland } 4470d41dd122SStefan Haberland 4471d41dd122SStefan Haberland /* Read Feature Codes */ 447268d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 4473d41dd122SStefan Haberland 4474d41dd122SStefan Haberland /* Read Device Characteristics */ 447568b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 44766fca97a9SStefan Haberland &temp_rdc_data, 64); 4477d41dd122SStefan Haberland if (rc) { 4478b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 4479b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 4480251afd69SStefan Haberland goto out_err2; 4481d41dd122SStefan Haberland } 4482a7602f6cSStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 44836fca97a9SStefan Haberland memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data)); 4484a7602f6cSStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4485d41dd122SStefan Haberland 4486d41dd122SStefan Haberland /* add device to alias management */ 4487d41dd122SStefan Haberland dasd_alias_add_device(device); 4488d41dd122SStefan Haberland 4489d41dd122SStefan Haberland return 0; 4490d41dd122SStefan Haberland 4491251afd69SStefan Haberland out_err2: 4492251afd69SStefan Haberland dasd_alias_disconnect_device_from_lcu(device); 4493d41dd122SStefan Haberland out_err: 4494e6125fbaSStefan Haberland return -1; 4495d41dd122SStefan Haberland } 4496d41dd122SStefan Haberland 4497501183f2SStefan Haberland static int dasd_eckd_reload_device(struct dasd_device *device) 4498501183f2SStefan Haberland { 4499501183f2SStefan Haberland struct dasd_eckd_private *private; 4500501183f2SStefan Haberland int rc, old_base; 45012dedf0d9SStefan Haberland char print_uid[60]; 45022dedf0d9SStefan Haberland struct dasd_uid uid; 45032dedf0d9SStefan Haberland unsigned long flags; 4504501183f2SStefan Haberland 4505501183f2SStefan Haberland private = (struct dasd_eckd_private *) device->private; 45062dedf0d9SStefan Haberland 45072dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4508501183f2SStefan Haberland old_base = private->uid.base_unit_addr; 45092dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 45102dedf0d9SStefan Haberland 4511501183f2SStefan Haberland /* Read Configuration Data */ 4512501183f2SStefan Haberland rc = dasd_eckd_read_conf(device); 4513501183f2SStefan Haberland if (rc) 4514501183f2SStefan Haberland goto out_err; 4515501183f2SStefan Haberland 45162dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 4517501183f2SStefan Haberland if (rc) 4518501183f2SStefan Haberland goto out_err; 4519501183f2SStefan Haberland /* 4520501183f2SStefan Haberland * update unit address configuration and 4521501183f2SStefan Haberland * add device to alias management 4522501183f2SStefan Haberland */ 4523501183f2SStefan Haberland dasd_alias_update_add_device(device); 4524501183f2SStefan Haberland 45252dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &uid); 45262dedf0d9SStefan Haberland 45272dedf0d9SStefan Haberland if (old_base != uid.base_unit_addr) { 45282dedf0d9SStefan Haberland if (strlen(uid.vduit) > 0) 45292dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 45302dedf0d9SStefan Haberland "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial, 45312dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr, uid.vduit); 4532501183f2SStefan Haberland else 45332dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 45342dedf0d9SStefan Haberland "%s.%s.%04x.%02x", uid.vendor, uid.serial, 45352dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr); 4536501183f2SStefan Haberland 4537501183f2SStefan Haberland dev_info(&device->cdev->dev, 4538501183f2SStefan Haberland "An Alias device was reassigned to a new base device " 45392dedf0d9SStefan Haberland "with UID: %s\n", print_uid); 4540501183f2SStefan Haberland } 4541501183f2SStefan Haberland return 0; 4542501183f2SStefan Haberland 4543501183f2SStefan Haberland out_err: 4544501183f2SStefan Haberland return -1; 4545501183f2SStefan Haberland } 4546501183f2SStefan Haberland 45475db8440cSStefan Haberland static int dasd_eckd_read_message_buffer(struct dasd_device *device, 45485db8440cSStefan Haberland struct dasd_rssd_messages *messages, 45495db8440cSStefan Haberland __u8 lpum) 45505db8440cSStefan Haberland { 45515db8440cSStefan Haberland struct dasd_rssd_messages *message_buf; 45525db8440cSStefan Haberland struct dasd_psf_prssd_data *prssdp; 45535db8440cSStefan Haberland struct dasd_eckd_private *private; 45545db8440cSStefan Haberland struct dasd_ccw_req *cqr; 45555db8440cSStefan Haberland struct ccw1 *ccw; 45565db8440cSStefan Haberland int rc; 45575db8440cSStefan Haberland 45585db8440cSStefan Haberland private = (struct dasd_eckd_private *) device->private; 45595db8440cSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 45605db8440cSStefan Haberland (sizeof(struct dasd_psf_prssd_data) + 45615db8440cSStefan Haberland sizeof(struct dasd_rssd_messages)), 45625db8440cSStefan Haberland device); 45635db8440cSStefan Haberland if (IS_ERR(cqr)) { 45645db8440cSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 45655db8440cSStefan Haberland "Could not allocate read message buffer request"); 45665db8440cSStefan Haberland return PTR_ERR(cqr); 45675db8440cSStefan Haberland } 45685db8440cSStefan Haberland 45695db8440cSStefan Haberland cqr->startdev = device; 45705db8440cSStefan Haberland cqr->memdev = device; 45715db8440cSStefan Haberland cqr->block = NULL; 45725db8440cSStefan Haberland cqr->expires = 10 * HZ; 45735db8440cSStefan Haberland set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 4574b179b037SStefan Haberland /* dasd_sleep_on_immediatly does not do complex error 4575b179b037SStefan Haberland * recovery so clear erp flag and set retry counter to 4576b179b037SStefan Haberland * do basic erp */ 4577b179b037SStefan Haberland clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 4578b179b037SStefan Haberland cqr->retries = 256; 45795db8440cSStefan Haberland 45805db8440cSStefan Haberland /* Prepare for Read Subsystem Data */ 45815db8440cSStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 45825db8440cSStefan Haberland memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 45835db8440cSStefan Haberland prssdp->order = PSF_ORDER_PRSSD; 45845db8440cSStefan Haberland prssdp->suborder = 0x03; /* Message Buffer */ 45855db8440cSStefan Haberland /* all other bytes of prssdp must be zero */ 45865db8440cSStefan Haberland 45875db8440cSStefan Haberland ccw = cqr->cpaddr; 45885db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 45895db8440cSStefan Haberland ccw->count = sizeof(struct dasd_psf_prssd_data); 45905db8440cSStefan Haberland ccw->flags |= CCW_FLAG_CC; 45915db8440cSStefan Haberland ccw->flags |= CCW_FLAG_SLI; 45925db8440cSStefan Haberland ccw->cda = (__u32)(addr_t) prssdp; 45935db8440cSStefan Haberland 45945db8440cSStefan Haberland /* Read Subsystem Data - message buffer */ 45955db8440cSStefan Haberland message_buf = (struct dasd_rssd_messages *) (prssdp + 1); 45965db8440cSStefan Haberland memset(message_buf, 0, sizeof(struct dasd_rssd_messages)); 45975db8440cSStefan Haberland 45985db8440cSStefan Haberland ccw++; 45995db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_RSSD; 46005db8440cSStefan Haberland ccw->count = sizeof(struct dasd_rssd_messages); 46015db8440cSStefan Haberland ccw->flags |= CCW_FLAG_SLI; 46025db8440cSStefan Haberland ccw->cda = (__u32)(addr_t) message_buf; 46035db8440cSStefan Haberland 46045db8440cSStefan Haberland cqr->buildclk = get_tod_clock(); 46055db8440cSStefan Haberland cqr->status = DASD_CQR_FILLED; 46065db8440cSStefan Haberland rc = dasd_sleep_on_immediatly(cqr); 46075db8440cSStefan Haberland if (rc == 0) { 46085db8440cSStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 46095db8440cSStefan Haberland message_buf = (struct dasd_rssd_messages *) 46105db8440cSStefan Haberland (prssdp + 1); 46115db8440cSStefan Haberland memcpy(messages, message_buf, 46125db8440cSStefan Haberland sizeof(struct dasd_rssd_messages)); 46135db8440cSStefan Haberland } else 46145db8440cSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 46155db8440cSStefan Haberland "Reading messages failed with rc=%d\n" 46165db8440cSStefan Haberland , rc); 46175db8440cSStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 46185db8440cSStefan Haberland return rc; 46195db8440cSStefan Haberland } 46205db8440cSStefan Haberland 46215db8440cSStefan Haberland /* 46225db8440cSStefan Haberland * Perform Subsystem Function - CUIR response 46235db8440cSStefan Haberland */ 46245db8440cSStefan Haberland static int 46255db8440cSStefan Haberland dasd_eckd_psf_cuir_response(struct dasd_device *device, int response, 46265db8440cSStefan Haberland __u32 message_id, 46275db8440cSStefan Haberland struct channel_path_desc *desc, 46285db8440cSStefan Haberland struct subchannel_id sch_id) 46295db8440cSStefan Haberland { 46305db8440cSStefan Haberland struct dasd_psf_cuir_response *psf_cuir; 46315db8440cSStefan Haberland struct dasd_ccw_req *cqr; 46325db8440cSStefan Haberland struct ccw1 *ccw; 46335db8440cSStefan Haberland int rc; 46345db8440cSStefan Haberland 46355db8440cSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 46365db8440cSStefan Haberland sizeof(struct dasd_psf_cuir_response), 46375db8440cSStefan Haberland device); 46385db8440cSStefan Haberland 46395db8440cSStefan Haberland if (IS_ERR(cqr)) { 46405db8440cSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 46415db8440cSStefan Haberland "Could not allocate PSF-CUIR request"); 46425db8440cSStefan Haberland return PTR_ERR(cqr); 46435db8440cSStefan Haberland } 46445db8440cSStefan Haberland 46455db8440cSStefan Haberland psf_cuir = (struct dasd_psf_cuir_response *)cqr->data; 46465db8440cSStefan Haberland psf_cuir->order = PSF_ORDER_CUIR_RESPONSE; 46475db8440cSStefan Haberland psf_cuir->cc = response; 46485db8440cSStefan Haberland if (desc) 46495db8440cSStefan Haberland psf_cuir->chpid = desc->chpid; 46505db8440cSStefan Haberland psf_cuir->message_id = message_id; 46515db8440cSStefan Haberland psf_cuir->cssid = sch_id.cssid; 46525db8440cSStefan Haberland psf_cuir->ssid = sch_id.ssid; 46535db8440cSStefan Haberland ccw = cqr->cpaddr; 46545db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 46555db8440cSStefan Haberland ccw->cda = (__u32)(addr_t)psf_cuir; 4656b179b037SStefan Haberland ccw->flags = CCW_FLAG_SLI; 46575db8440cSStefan Haberland ccw->count = sizeof(struct dasd_psf_cuir_response); 46585db8440cSStefan Haberland 46595db8440cSStefan Haberland cqr->startdev = device; 46605db8440cSStefan Haberland cqr->memdev = device; 46615db8440cSStefan Haberland cqr->block = NULL; 46625db8440cSStefan Haberland cqr->retries = 256; 46635db8440cSStefan Haberland cqr->expires = 10*HZ; 46645db8440cSStefan Haberland cqr->buildclk = get_tod_clock(); 46655db8440cSStefan Haberland cqr->status = DASD_CQR_FILLED; 4666b179b037SStefan Haberland set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 46675db8440cSStefan Haberland 46685db8440cSStefan Haberland rc = dasd_sleep_on(cqr); 46695db8440cSStefan Haberland 46705db8440cSStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 46715db8440cSStefan Haberland return rc; 46725db8440cSStefan Haberland } 46735db8440cSStefan Haberland 4674b179b037SStefan Haberland /* 4675b179b037SStefan Haberland * return configuration data that is referenced by record selector 4676b179b037SStefan Haberland * if a record selector is specified or per default return the 4677b179b037SStefan Haberland * conf_data pointer for the path specified by lpum 4678b179b037SStefan Haberland */ 4679b179b037SStefan Haberland static struct dasd_conf_data *dasd_eckd_get_ref_conf(struct dasd_device *device, 4680b179b037SStefan Haberland __u8 lpum, 4681b179b037SStefan Haberland struct dasd_cuir_message *cuir) 46825db8440cSStefan Haberland { 4683b179b037SStefan Haberland struct dasd_eckd_private *private; 4684b179b037SStefan Haberland struct dasd_conf_data *conf_data; 4685b179b037SStefan Haberland int path, pos; 46865db8440cSStefan Haberland 4687b179b037SStefan Haberland private = (struct dasd_eckd_private *) device->private; 4688b179b037SStefan Haberland if (cuir->record_selector == 0) 4689b179b037SStefan Haberland goto out; 4690b179b037SStefan Haberland for (path = 0x80, pos = 0; path; path >>= 1, pos++) { 4691b179b037SStefan Haberland conf_data = private->path_conf_data[pos]; 4692b179b037SStefan Haberland if (conf_data->gneq.record_selector == 4693b179b037SStefan Haberland cuir->record_selector) 4694b179b037SStefan Haberland return conf_data; 46955db8440cSStefan Haberland } 4696b179b037SStefan Haberland out: 46979d49f86dSSebastian Ott return private->path_conf_data[pathmask_to_pos(lpum)]; 46985db8440cSStefan Haberland } 46995db8440cSStefan Haberland 47005db8440cSStefan Haberland /* 4701b179b037SStefan Haberland * This function determines the scope of a reconfiguration request by 4702b179b037SStefan Haberland * analysing the path and device selection data provided in the CUIR request. 4703b179b037SStefan Haberland * Returns a path mask containing CUIR affected paths for the give device. 4704b179b037SStefan Haberland * 4705b179b037SStefan Haberland * If the CUIR request does not contain the required information return the 4706b179b037SStefan Haberland * path mask of the path the attention message for the CUIR request was reveived 4707b179b037SStefan Haberland * on. 4708b179b037SStefan Haberland */ 4709b179b037SStefan Haberland static int dasd_eckd_cuir_scope(struct dasd_device *device, __u8 lpum, 4710b179b037SStefan Haberland struct dasd_cuir_message *cuir) 4711b179b037SStefan Haberland { 4712b179b037SStefan Haberland struct dasd_conf_data *ref_conf_data; 4713b179b037SStefan Haberland unsigned long bitmask = 0, mask = 0; 4714b179b037SStefan Haberland struct dasd_eckd_private *private; 4715b179b037SStefan Haberland struct dasd_conf_data *conf_data; 4716b179b037SStefan Haberland unsigned int pos, path; 4717b179b037SStefan Haberland char *ref_gneq, *gneq; 4718b179b037SStefan Haberland char *ref_ned, *ned; 4719b179b037SStefan Haberland int tbcpm = 0; 4720b179b037SStefan Haberland 4721b179b037SStefan Haberland /* if CUIR request does not specify the scope use the path 4722b179b037SStefan Haberland the attention message was presented on */ 4723b179b037SStefan Haberland if (!cuir->ned_map || 4724b179b037SStefan Haberland !(cuir->neq_map[0] | cuir->neq_map[1] | cuir->neq_map[2])) 4725b179b037SStefan Haberland return lpum; 4726b179b037SStefan Haberland 4727b179b037SStefan Haberland private = (struct dasd_eckd_private *) device->private; 4728b179b037SStefan Haberland /* get reference conf data */ 4729b179b037SStefan Haberland ref_conf_data = dasd_eckd_get_ref_conf(device, lpum, cuir); 4730b179b037SStefan Haberland /* reference ned is determined by ned_map field */ 4731b179b037SStefan Haberland pos = 8 - ffs(cuir->ned_map); 4732b179b037SStefan Haberland ref_ned = (char *)&ref_conf_data->neds[pos]; 4733b179b037SStefan Haberland ref_gneq = (char *)&ref_conf_data->gneq; 4734b179b037SStefan Haberland /* transfer 24 bit neq_map to mask */ 4735b179b037SStefan Haberland mask = cuir->neq_map[2]; 4736b179b037SStefan Haberland mask |= cuir->neq_map[1] << 8; 4737b179b037SStefan Haberland mask |= cuir->neq_map[0] << 16; 4738b179b037SStefan Haberland 4739b179b037SStefan Haberland for (path = 0x80; path; path >>= 1) { 4740b179b037SStefan Haberland /* initialise data per path */ 4741b179b037SStefan Haberland bitmask = mask; 47429d49f86dSSebastian Ott pos = pathmask_to_pos(path); 4743b179b037SStefan Haberland conf_data = private->path_conf_data[pos]; 4744b179b037SStefan Haberland pos = 8 - ffs(cuir->ned_map); 4745b179b037SStefan Haberland ned = (char *) &conf_data->neds[pos]; 4746b179b037SStefan Haberland /* compare reference ned and per path ned */ 4747b179b037SStefan Haberland if (memcmp(ref_ned, ned, sizeof(*ned)) != 0) 4748b179b037SStefan Haberland continue; 4749b179b037SStefan Haberland gneq = (char *)&conf_data->gneq; 4750b179b037SStefan Haberland /* compare reference gneq and per_path gneq under 4751b179b037SStefan Haberland 24 bit mask where mask bit 0 equals byte 7 of 4752b179b037SStefan Haberland the gneq and mask bit 24 equals byte 31 */ 4753b179b037SStefan Haberland while (bitmask) { 4754b179b037SStefan Haberland pos = ffs(bitmask) - 1; 4755b179b037SStefan Haberland if (memcmp(&ref_gneq[31 - pos], &gneq[31 - pos], 1) 4756b179b037SStefan Haberland != 0) 4757b179b037SStefan Haberland break; 4758b179b037SStefan Haberland clear_bit(pos, &bitmask); 4759b179b037SStefan Haberland } 4760b179b037SStefan Haberland if (bitmask) 4761b179b037SStefan Haberland continue; 4762b179b037SStefan Haberland /* device and path match the reference values 4763b179b037SStefan Haberland add path to CUIR scope */ 4764b179b037SStefan Haberland tbcpm |= path; 4765b179b037SStefan Haberland } 4766b179b037SStefan Haberland return tbcpm; 4767b179b037SStefan Haberland } 4768b179b037SStefan Haberland 4769b179b037SStefan Haberland static void dasd_eckd_cuir_notify_user(struct dasd_device *device, 4770b179b037SStefan Haberland unsigned long paths, 4771b179b037SStefan Haberland struct subchannel_id sch_id, int action) 4772b179b037SStefan Haberland { 4773b179b037SStefan Haberland struct channel_path_desc *desc; 4774b179b037SStefan Haberland int pos; 4775b179b037SStefan Haberland 4776b179b037SStefan Haberland while (paths) { 4777b179b037SStefan Haberland /* get position of bit in mask */ 4778b179b037SStefan Haberland pos = ffs(paths) - 1; 4779b179b037SStefan Haberland /* get channel path descriptor from this position */ 4780b179b037SStefan Haberland desc = ccw_device_get_chp_desc(device->cdev, 7 - pos); 4781b179b037SStefan Haberland if (action == CUIR_QUIESCE) 4782b179b037SStefan Haberland pr_warn("Service on the storage server caused path " 4783b179b037SStefan Haberland "%x.%02x to go offline", sch_id.cssid, 4784b179b037SStefan Haberland desc ? desc->chpid : 0); 4785b179b037SStefan Haberland else if (action == CUIR_RESUME) 4786b179b037SStefan Haberland pr_info("Path %x.%02x is back online after service " 4787b179b037SStefan Haberland "on the storage server", sch_id.cssid, 4788b179b037SStefan Haberland desc ? desc->chpid : 0); 4789b179b037SStefan Haberland kfree(desc); 4790b179b037SStefan Haberland clear_bit(pos, &paths); 4791b179b037SStefan Haberland } 4792b179b037SStefan Haberland } 4793b179b037SStefan Haberland 4794b179b037SStefan Haberland static int dasd_eckd_cuir_remove_path(struct dasd_device *device, __u8 lpum, 4795b179b037SStefan Haberland struct dasd_cuir_message *cuir) 4796b179b037SStefan Haberland { 4797b179b037SStefan Haberland unsigned long tbcpm; 4798b179b037SStefan Haberland 4799b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(device, lpum, cuir); 4800b179b037SStefan Haberland /* nothing to do if path is not in use */ 4801b179b037SStefan Haberland if (!(device->path_data.opm & tbcpm)) 4802b179b037SStefan Haberland return 0; 4803b179b037SStefan Haberland if (!(device->path_data.opm & ~tbcpm)) { 4804b179b037SStefan Haberland /* no path would be left if the CUIR action is taken 4805b179b037SStefan Haberland return error */ 4806b179b037SStefan Haberland return -EINVAL; 4807b179b037SStefan Haberland } 4808b179b037SStefan Haberland /* remove device from operational path mask */ 4809b179b037SStefan Haberland device->path_data.opm &= ~tbcpm; 4810b179b037SStefan Haberland device->path_data.cuirpm |= tbcpm; 4811b179b037SStefan Haberland return tbcpm; 4812b179b037SStefan Haberland } 4813b179b037SStefan Haberland 4814b179b037SStefan Haberland /* 4815b179b037SStefan Haberland * walk through all devices and build a path mask to quiesce them 4816b179b037SStefan Haberland * return an error if the last path to a device would be removed 48175db8440cSStefan Haberland * 48185db8440cSStefan Haberland * if only part of the devices are quiesced and an error 48195db8440cSStefan Haberland * occurs no onlining necessary, the storage server will 48205db8440cSStefan Haberland * notify the already set offline devices again 48215db8440cSStefan Haberland */ 48225db8440cSStefan Haberland static int dasd_eckd_cuir_quiesce(struct dasd_device *device, __u8 lpum, 4823b179b037SStefan Haberland struct subchannel_id sch_id, 4824b179b037SStefan Haberland struct dasd_cuir_message *cuir) 48255db8440cSStefan Haberland { 48265db8440cSStefan Haberland struct alias_pav_group *pavgroup, *tempgroup; 48275db8440cSStefan Haberland struct dasd_eckd_private *private; 48285db8440cSStefan Haberland struct dasd_device *dev, *n; 4829b179b037SStefan Haberland unsigned long paths = 0; 4830b179b037SStefan Haberland unsigned long flags; 4831b179b037SStefan Haberland int tbcpm; 48325db8440cSStefan Haberland 48335db8440cSStefan Haberland private = (struct dasd_eckd_private *) device->private; 48345db8440cSStefan Haberland /* active devices */ 4835b179b037SStefan Haberland list_for_each_entry_safe(dev, n, &private->lcu->active_devices, 48365db8440cSStefan Haberland alias_list) { 4837b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 4838b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 4839b179b037SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); 4840b179b037SStefan Haberland if (tbcpm < 0) 4841b179b037SStefan Haberland goto out_err; 4842b179b037SStefan Haberland paths |= tbcpm; 48435db8440cSStefan Haberland } 48445db8440cSStefan Haberland /* inactive devices */ 4845b179b037SStefan Haberland list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices, 48465db8440cSStefan Haberland alias_list) { 4847b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 4848b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 4849b179b037SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); 4850b179b037SStefan Haberland if (tbcpm < 0) 4851b179b037SStefan Haberland goto out_err; 4852b179b037SStefan Haberland paths |= tbcpm; 48535db8440cSStefan Haberland } 48545db8440cSStefan Haberland /* devices in PAV groups */ 48555db8440cSStefan Haberland list_for_each_entry_safe(pavgroup, tempgroup, 48565db8440cSStefan Haberland &private->lcu->grouplist, group) { 48575db8440cSStefan Haberland list_for_each_entry_safe(dev, n, &pavgroup->baselist, 48585db8440cSStefan Haberland alias_list) { 4859b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 4860b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 4861b179b037SStefan Haberland spin_unlock_irqrestore( 4862b179b037SStefan Haberland get_ccwdev_lock(dev->cdev), flags); 4863b179b037SStefan Haberland if (tbcpm < 0) 4864b179b037SStefan Haberland goto out_err; 4865b179b037SStefan Haberland paths |= tbcpm; 48665db8440cSStefan Haberland } 48675db8440cSStefan Haberland list_for_each_entry_safe(dev, n, &pavgroup->aliaslist, 48685db8440cSStefan Haberland alias_list) { 4869b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 4870b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 4871b179b037SStefan Haberland spin_unlock_irqrestore( 4872b179b037SStefan Haberland get_ccwdev_lock(dev->cdev), flags); 4873b179b037SStefan Haberland if (tbcpm < 0) 4874b179b037SStefan Haberland goto out_err; 4875b179b037SStefan Haberland paths |= tbcpm; 48765db8440cSStefan Haberland } 48775db8440cSStefan Haberland } 4878b179b037SStefan Haberland /* notify user about all paths affected by CUIR action */ 4879b179b037SStefan Haberland dasd_eckd_cuir_notify_user(device, paths, sch_id, CUIR_QUIESCE); 4880b179b037SStefan Haberland return 0; 4881b179b037SStefan Haberland out_err: 4882b179b037SStefan Haberland return tbcpm; 48835db8440cSStefan Haberland } 48845db8440cSStefan Haberland 48855db8440cSStefan Haberland static int dasd_eckd_cuir_resume(struct dasd_device *device, __u8 lpum, 4886b179b037SStefan Haberland struct subchannel_id sch_id, 4887b179b037SStefan Haberland struct dasd_cuir_message *cuir) 48885db8440cSStefan Haberland { 48895db8440cSStefan Haberland struct alias_pav_group *pavgroup, *tempgroup; 48905db8440cSStefan Haberland struct dasd_eckd_private *private; 48915db8440cSStefan Haberland struct dasd_device *dev, *n; 4892b179b037SStefan Haberland unsigned long paths = 0; 4893b179b037SStefan Haberland int tbcpm; 48945db8440cSStefan Haberland 48955db8440cSStefan Haberland private = (struct dasd_eckd_private *) device->private; 48965db8440cSStefan Haberland /* 48975db8440cSStefan Haberland * the path may have been added through a generic path event before 48985db8440cSStefan Haberland * only trigger path verification if the path is not already in use 48995db8440cSStefan Haberland */ 49005db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 49015db8440cSStefan Haberland &private->lcu->active_devices, 49025db8440cSStefan Haberland alias_list) { 4903b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 4904b179b037SStefan Haberland paths |= tbcpm; 4905b179b037SStefan Haberland if (!(dev->path_data.opm & tbcpm)) { 4906b179b037SStefan Haberland dev->path_data.tbvpm |= tbcpm; 49075db8440cSStefan Haberland dasd_schedule_device_bh(dev); 49085db8440cSStefan Haberland } 49095db8440cSStefan Haberland } 49105db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 49115db8440cSStefan Haberland &private->lcu->inactive_devices, 49125db8440cSStefan Haberland alias_list) { 4913b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 4914b179b037SStefan Haberland paths |= tbcpm; 4915b179b037SStefan Haberland if (!(dev->path_data.opm & tbcpm)) { 4916b179b037SStefan Haberland dev->path_data.tbvpm |= tbcpm; 49175db8440cSStefan Haberland dasd_schedule_device_bh(dev); 49185db8440cSStefan Haberland } 49195db8440cSStefan Haberland } 49205db8440cSStefan Haberland /* devices in PAV groups */ 49215db8440cSStefan Haberland list_for_each_entry_safe(pavgroup, tempgroup, 49225db8440cSStefan Haberland &private->lcu->grouplist, 49235db8440cSStefan Haberland group) { 49245db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 49255db8440cSStefan Haberland &pavgroup->baselist, 49265db8440cSStefan Haberland alias_list) { 4927b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 4928b179b037SStefan Haberland paths |= tbcpm; 4929b179b037SStefan Haberland if (!(dev->path_data.opm & tbcpm)) { 4930b179b037SStefan Haberland dev->path_data.tbvpm |= tbcpm; 49315db8440cSStefan Haberland dasd_schedule_device_bh(dev); 49325db8440cSStefan Haberland } 49335db8440cSStefan Haberland } 49345db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 49355db8440cSStefan Haberland &pavgroup->aliaslist, 49365db8440cSStefan Haberland alias_list) { 4937b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 4938b179b037SStefan Haberland paths |= tbcpm; 4939b179b037SStefan Haberland if (!(dev->path_data.opm & tbcpm)) { 4940b179b037SStefan Haberland dev->path_data.tbvpm |= tbcpm; 49415db8440cSStefan Haberland dasd_schedule_device_bh(dev); 49425db8440cSStefan Haberland } 49435db8440cSStefan Haberland } 49445db8440cSStefan Haberland } 4945b179b037SStefan Haberland /* notify user about all paths affected by CUIR action */ 4946b179b037SStefan Haberland dasd_eckd_cuir_notify_user(device, paths, sch_id, CUIR_RESUME); 4947b179b037SStefan Haberland return 0; 49485db8440cSStefan Haberland } 49495db8440cSStefan Haberland 49505db8440cSStefan Haberland static void dasd_eckd_handle_cuir(struct dasd_device *device, void *messages, 49515db8440cSStefan Haberland __u8 lpum) 49525db8440cSStefan Haberland { 49535db8440cSStefan Haberland struct dasd_cuir_message *cuir = messages; 49545db8440cSStefan Haberland struct channel_path_desc *desc; 49555db8440cSStefan Haberland struct subchannel_id sch_id; 49565db8440cSStefan Haberland int pos, response; 49575db8440cSStefan Haberland 4958b179b037SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, 4959b179b037SStefan Haberland "CUIR request: %016llx %016llx %016llx %08x", 4960b179b037SStefan Haberland ((u64 *)cuir)[0], ((u64 *)cuir)[1], ((u64 *)cuir)[2], 4961b179b037SStefan Haberland ((u32 *)cuir)[3]); 4962b179b037SStefan Haberland ccw_device_get_schid(device->cdev, &sch_id); 49639d49f86dSSebastian Ott pos = pathmask_to_pos(lpum); 49645db8440cSStefan Haberland desc = ccw_device_get_chp_desc(device->cdev, pos); 49655db8440cSStefan Haberland 49665db8440cSStefan Haberland if (cuir->code == CUIR_QUIESCE) { 49675db8440cSStefan Haberland /* quiesce */ 4968b179b037SStefan Haberland if (dasd_eckd_cuir_quiesce(device, lpum, sch_id, cuir)) 4969b179b037SStefan Haberland response = PSF_CUIR_LAST_PATH; 4970b179b037SStefan Haberland else 4971b179b037SStefan Haberland response = PSF_CUIR_COMPLETED; 49725db8440cSStefan Haberland } else if (cuir->code == CUIR_RESUME) { 49735db8440cSStefan Haberland /* resume */ 4974b179b037SStefan Haberland dasd_eckd_cuir_resume(device, lpum, sch_id, cuir); 4975b179b037SStefan Haberland response = PSF_CUIR_COMPLETED; 49765db8440cSStefan Haberland } else 49775db8440cSStefan Haberland response = PSF_CUIR_NOT_SUPPORTED; 49785db8440cSStefan Haberland 4979b179b037SStefan Haberland dasd_eckd_psf_cuir_response(device, response, 4980b179b037SStefan Haberland cuir->message_id, desc, sch_id); 4981b179b037SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, 4982b179b037SStefan Haberland "CUIR response: %d on message ID %08x", response, 4983b179b037SStefan Haberland cuir->message_id); 49845db8440cSStefan Haberland /* free descriptor copy */ 49855db8440cSStefan Haberland kfree(desc); 4986b179b037SStefan Haberland /* to make sure there is no attention left schedule work again */ 4987b179b037SStefan Haberland device->discipline->check_attention(device, lpum); 49885db8440cSStefan Haberland } 49895db8440cSStefan Haberland 49905db8440cSStefan Haberland static void dasd_eckd_check_attention_work(struct work_struct *work) 49915db8440cSStefan Haberland { 49925db8440cSStefan Haberland struct check_attention_work_data *data; 49935db8440cSStefan Haberland struct dasd_rssd_messages *messages; 49945db8440cSStefan Haberland struct dasd_device *device; 49955db8440cSStefan Haberland int rc; 49965db8440cSStefan Haberland 49975db8440cSStefan Haberland data = container_of(work, struct check_attention_work_data, worker); 49985db8440cSStefan Haberland device = data->device; 49995db8440cSStefan Haberland messages = kzalloc(sizeof(*messages), GFP_KERNEL); 50005db8440cSStefan Haberland if (!messages) { 50015db8440cSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 50025db8440cSStefan Haberland "Could not allocate attention message buffer"); 50035db8440cSStefan Haberland goto out; 50045db8440cSStefan Haberland } 50055db8440cSStefan Haberland rc = dasd_eckd_read_message_buffer(device, messages, data->lpum); 50065db8440cSStefan Haberland if (rc) 50075db8440cSStefan Haberland goto out; 50085db8440cSStefan Haberland if (messages->length == ATTENTION_LENGTH_CUIR && 50095db8440cSStefan Haberland messages->format == ATTENTION_FORMAT_CUIR) 50105db8440cSStefan Haberland dasd_eckd_handle_cuir(device, messages, data->lpum); 50115db8440cSStefan Haberland out: 50125db8440cSStefan Haberland dasd_put_device(device); 50135db8440cSStefan Haberland kfree(messages); 50145db8440cSStefan Haberland kfree(data); 50155db8440cSStefan Haberland } 50165db8440cSStefan Haberland 50175db8440cSStefan Haberland static int dasd_eckd_check_attention(struct dasd_device *device, __u8 lpum) 50185db8440cSStefan Haberland { 50195db8440cSStefan Haberland struct check_attention_work_data *data; 50205db8440cSStefan Haberland 50215db8440cSStefan Haberland data = kzalloc(sizeof(*data), GFP_ATOMIC); 50225db8440cSStefan Haberland if (!data) 50235db8440cSStefan Haberland return -ENOMEM; 50245db8440cSStefan Haberland INIT_WORK(&data->worker, dasd_eckd_check_attention_work); 50255db8440cSStefan Haberland dasd_get_device(device); 50265db8440cSStefan Haberland data->device = device; 50275db8440cSStefan Haberland data->lpum = lpum; 50285db8440cSStefan Haberland schedule_work(&data->worker); 50295db8440cSStefan Haberland return 0; 50305db8440cSStefan Haberland } 50315db8440cSStefan Haberland 5032d41dd122SStefan Haberland static struct ccw_driver dasd_eckd_driver = { 50333bda058bSSebastian Ott .driver = { 5034d41dd122SStefan Haberland .name = "dasd-eckd", 5035d41dd122SStefan Haberland .owner = THIS_MODULE, 50363bda058bSSebastian Ott }, 5037d41dd122SStefan Haberland .ids = dasd_eckd_ids, 5038d41dd122SStefan Haberland .probe = dasd_eckd_probe, 5039d41dd122SStefan Haberland .remove = dasd_generic_remove, 5040d41dd122SStefan Haberland .set_offline = dasd_generic_set_offline, 5041d41dd122SStefan Haberland .set_online = dasd_eckd_set_online, 5042d41dd122SStefan Haberland .notify = dasd_generic_notify, 5043a4d26c6aSStefan Weinhuber .path_event = dasd_generic_path_event, 50444679e893SStefan Haberland .shutdown = dasd_generic_shutdown, 5045d41dd122SStefan Haberland .freeze = dasd_generic_pm_freeze, 5046d41dd122SStefan Haberland .thaw = dasd_generic_restore_device, 5047d41dd122SStefan Haberland .restore = dasd_generic_restore_device, 5048a23ed009SStefan Haberland .uc_handler = dasd_generic_uc_handler, 5049420f42ecSHeiko Carstens .int_class = IRQIO_DAS, 5050d41dd122SStefan Haberland }; 5051f3eb5384SStefan Weinhuber 50521da177e4SLinus Torvalds /* 50531da177e4SLinus Torvalds * max_blocks is dependent on the amount of storage that is available 50541da177e4SLinus Torvalds * in the static io buffer for each device. Currently each device has 50551da177e4SLinus Torvalds * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has 50561da177e4SLinus Torvalds * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use 50571da177e4SLinus Torvalds * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In 50581da177e4SLinus Torvalds * addition we have one define extent ccw + 16 bytes of data and one 50591da177e4SLinus Torvalds * locate record ccw + 16 bytes of data. That makes: 50601da177e4SLinus Torvalds * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. 50611da177e4SLinus Torvalds * We want to fit two into the available memory so that we can immediately 50621da177e4SLinus Torvalds * start the next request if one finishes off. That makes 249.5 blocks 50631da177e4SLinus Torvalds * for one request. Give a little safety and the result is 240. 50641da177e4SLinus Torvalds */ 50651da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline = { 50661da177e4SLinus Torvalds .owner = THIS_MODULE, 50671da177e4SLinus Torvalds .name = "ECKD", 50681da177e4SLinus Torvalds .ebcname = "ECKD", 5069ef19298bSStefan Weinhuber .max_blocks = 190, 50701da177e4SLinus Torvalds .check_device = dasd_eckd_check_characteristics, 50718e09f215SStefan Weinhuber .uncheck_device = dasd_eckd_uncheck_device, 50721da177e4SLinus Torvalds .do_analysis = dasd_eckd_do_analysis, 5073a4d26c6aSStefan Weinhuber .verify_path = dasd_eckd_verify_path, 5074d42e1712SStefan Haberland .basic_to_ready = dasd_eckd_basic_to_ready, 50758e09f215SStefan Weinhuber .online_to_ready = dasd_eckd_online_to_ready, 5076daa991bfSStefan Haberland .basic_to_known = dasd_eckd_basic_to_known, 50771da177e4SLinus Torvalds .fill_geometry = dasd_eckd_fill_geometry, 50781da177e4SLinus Torvalds .start_IO = dasd_start_IO, 50791da177e4SLinus Torvalds .term_IO = dasd_term_IO, 50808e09f215SStefan Weinhuber .handle_terminated_request = dasd_eckd_handle_terminated_request, 50811da177e4SLinus Torvalds .format_device = dasd_eckd_format_device, 50821da177e4SLinus Torvalds .erp_action = dasd_eckd_erp_action, 50831da177e4SLinus Torvalds .erp_postaction = dasd_eckd_erp_postaction, 50845a27e60dSStefan Weinhuber .check_for_device_change = dasd_eckd_check_for_device_change, 50858e09f215SStefan Weinhuber .build_cp = dasd_eckd_build_alias_cp, 50868e09f215SStefan Weinhuber .free_cp = dasd_eckd_free_alias_cp, 50871da177e4SLinus Torvalds .dump_sense = dasd_eckd_dump_sense, 5088fc19f381SStefan Haberland .dump_sense_dbf = dasd_eckd_dump_sense_dbf, 50891da177e4SLinus Torvalds .fill_info = dasd_eckd_fill_info, 50901107ccfbSChristoph Hellwig .ioctl = dasd_eckd_ioctl, 5091d41dd122SStefan Haberland .freeze = dasd_eckd_pm_freeze, 5092d41dd122SStefan Haberland .restore = dasd_eckd_restore_device, 5093501183f2SStefan Haberland .reload = dasd_eckd_reload_device, 50942dedf0d9SStefan Haberland .get_uid = dasd_eckd_get_uid, 5095f1633031SStefan Haberland .kick_validate = dasd_eckd_kick_validate_server, 50965db8440cSStefan Haberland .check_attention = dasd_eckd_check_attention, 50971da177e4SLinus Torvalds }; 50981da177e4SLinus Torvalds 50991da177e4SLinus Torvalds static int __init 51001da177e4SLinus Torvalds dasd_eckd_init(void) 51011da177e4SLinus Torvalds { 5102736e6ea0SSebastian Ott int ret; 5103736e6ea0SSebastian Ott 51041da177e4SLinus Torvalds ASCEBC(dasd_eckd_discipline.ebcname, 4); 5105f932bceaSStefan Weinhuber dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), 5106f932bceaSStefan Weinhuber GFP_KERNEL | GFP_DMA); 5107f932bceaSStefan Weinhuber if (!dasd_reserve_req) 5108f932bceaSStefan Weinhuber return -ENOMEM; 5109a4d26c6aSStefan Weinhuber path_verification_worker = kmalloc(sizeof(*path_verification_worker), 5110a4d26c6aSStefan Weinhuber GFP_KERNEL | GFP_DMA); 5111a4d26c6aSStefan Weinhuber if (!path_verification_worker) { 5112a4d26c6aSStefan Weinhuber kfree(dasd_reserve_req); 5113a4d26c6aSStefan Weinhuber return -ENOMEM; 5114a4d26c6aSStefan Weinhuber } 5115558b9ef0SStefan Weinhuber rawpadpage = (void *)__get_free_page(GFP_KERNEL); 5116558b9ef0SStefan Weinhuber if (!rawpadpage) { 5117558b9ef0SStefan Weinhuber kfree(path_verification_worker); 5118558b9ef0SStefan Weinhuber kfree(dasd_reserve_req); 5119558b9ef0SStefan Weinhuber return -ENOMEM; 5120558b9ef0SStefan Weinhuber } 5121736e6ea0SSebastian Ott ret = ccw_driver_register(&dasd_eckd_driver); 5122736e6ea0SSebastian Ott if (!ret) 5123736e6ea0SSebastian Ott wait_for_device_probe(); 5124a4d26c6aSStefan Weinhuber else { 5125a4d26c6aSStefan Weinhuber kfree(path_verification_worker); 5126f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 5127558b9ef0SStefan Weinhuber free_page((unsigned long)rawpadpage); 5128a4d26c6aSStefan Weinhuber } 5129736e6ea0SSebastian Ott return ret; 51301da177e4SLinus Torvalds } 51311da177e4SLinus Torvalds 51321da177e4SLinus Torvalds static void __exit 51331da177e4SLinus Torvalds dasd_eckd_cleanup(void) 51341da177e4SLinus Torvalds { 51351da177e4SLinus Torvalds ccw_driver_unregister(&dasd_eckd_driver); 5136a4d26c6aSStefan Weinhuber kfree(path_verification_worker); 5137f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 5138558b9ef0SStefan Weinhuber free_page((unsigned long)rawpadpage); 51391da177e4SLinus Torvalds } 51401da177e4SLinus Torvalds 51411da177e4SLinus Torvalds module_init(dasd_eckd_init); 51421da177e4SLinus Torvalds module_exit(dasd_eckd_cleanup); 5143