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 10354abb08c2SStefan Weinhuber static int dasd_eckd_read_conf(struct dasd_device *device) 10361da177e4SLinus Torvalds { 10371da177e4SLinus Torvalds void *conf_data; 10381da177e4SLinus Torvalds int conf_len, conf_data_saved; 103955d3a85cSStefan Haberland int rc, path_err; 1040a4d26c6aSStefan Weinhuber __u8 lpm, opm; 1041b206181dSStefan Haberland struct dasd_eckd_private *private, path_private; 1042a4d26c6aSStefan Weinhuber struct dasd_path *path_data; 1043b206181dSStefan Haberland struct dasd_uid *uid; 1044b206181dSStefan Haberland char print_path_uid[60], print_device_uid[60]; 10451da177e4SLinus Torvalds 10461da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 1047a4d26c6aSStefan Weinhuber path_data = &device->path_data; 1048a4d26c6aSStefan Weinhuber opm = ccw_device_get_path_mask(device->cdev); 10491da177e4SLinus Torvalds conf_data_saved = 0; 105055d3a85cSStefan Haberland path_err = 0; 10511da177e4SLinus Torvalds /* get configuration data per operational path */ 10521da177e4SLinus Torvalds for (lpm = 0x80; lpm; lpm>>= 1) { 1053b206181dSStefan Haberland if (!(lpm & opm)) 1054b206181dSStefan Haberland continue; 105517283b56SCornelia Huck rc = dasd_eckd_read_conf_lpm(device, &conf_data, 10561da177e4SLinus Torvalds &conf_len, lpm); 10571da177e4SLinus Torvalds if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ 1058b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 10591da177e4SLinus Torvalds "Read configuration data returned " 1060b8ed5dd5SStefan Haberland "error %d", rc); 10611da177e4SLinus Torvalds return rc; 10621da177e4SLinus Torvalds } 10631da177e4SLinus Torvalds if (conf_data == NULL) { 1064b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1065b8ed5dd5SStefan Haberland "No configuration data " 1066b8ed5dd5SStefan Haberland "retrieved"); 1067a4d26c6aSStefan Weinhuber /* no further analysis possible */ 1068a4d26c6aSStefan Weinhuber path_data->opm |= lpm; 1069d133a960SGabriel Craciunescu continue; /* no error */ 10701da177e4SLinus Torvalds } 10711da177e4SLinus Torvalds /* save first valid configuration data */ 10721da177e4SLinus Torvalds if (!conf_data_saved) { 10734abb08c2SStefan Weinhuber kfree(private->conf_data); 10744abb08c2SStefan Weinhuber private->conf_data = conf_data; 10754abb08c2SStefan Weinhuber private->conf_len = conf_len; 10764abb08c2SStefan Weinhuber if (dasd_eckd_identify_conf_parts(private)) { 10774abb08c2SStefan Weinhuber private->conf_data = NULL; 10784abb08c2SStefan Weinhuber private->conf_len = 0; 10794abb08c2SStefan Weinhuber kfree(conf_data); 10804abb08c2SStefan Weinhuber continue; 10814abb08c2SStefan Weinhuber } 1082b206181dSStefan Haberland /* 1083b206181dSStefan Haberland * build device UID that other path data 1084b206181dSStefan Haberland * can be compared to it 1085b206181dSStefan Haberland */ 1086b206181dSStefan Haberland dasd_eckd_generate_uid(device); 10871da177e4SLinus Torvalds conf_data_saved++; 1088b206181dSStefan Haberland } else { 1089b206181dSStefan Haberland path_private.conf_data = conf_data; 1090b206181dSStefan Haberland path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1091b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts( 1092b206181dSStefan Haberland &path_private)) { 1093b206181dSStefan Haberland path_private.conf_data = NULL; 1094b206181dSStefan Haberland path_private.conf_len = 0; 1095b206181dSStefan Haberland kfree(conf_data); 1096b206181dSStefan Haberland continue; 1097b206181dSStefan Haberland } 1098b206181dSStefan Haberland 1099b206181dSStefan Haberland if (dasd_eckd_compare_path_uid( 1100b206181dSStefan Haberland device, &path_private)) { 1101b206181dSStefan Haberland uid = &path_private.uid; 1102b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1103b206181dSStefan Haberland snprintf(print_path_uid, 1104b206181dSStefan Haberland sizeof(print_path_uid), 1105b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1106b206181dSStefan Haberland uid->vendor, uid->serial, 1107b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1108b206181dSStefan Haberland uid->vduit); 1109b206181dSStefan Haberland else 1110b206181dSStefan Haberland snprintf(print_path_uid, 1111b206181dSStefan Haberland sizeof(print_path_uid), 1112b206181dSStefan Haberland "%s.%s.%04x.%02x", 1113b206181dSStefan Haberland uid->vendor, uid->serial, 1114b206181dSStefan Haberland uid->ssid, 1115b206181dSStefan Haberland uid->real_unit_addr); 1116b206181dSStefan Haberland uid = &private->uid; 1117b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1118b206181dSStefan Haberland snprintf(print_device_uid, 1119b206181dSStefan Haberland sizeof(print_device_uid), 1120b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1121b206181dSStefan Haberland uid->vendor, uid->serial, 1122b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1123b206181dSStefan Haberland uid->vduit); 1124b206181dSStefan Haberland else 1125b206181dSStefan Haberland snprintf(print_device_uid, 1126b206181dSStefan Haberland sizeof(print_device_uid), 1127b206181dSStefan Haberland "%s.%s.%04x.%02x", 1128b206181dSStefan Haberland uid->vendor, uid->serial, 1129b206181dSStefan Haberland uid->ssid, 1130b206181dSStefan Haberland uid->real_unit_addr); 1131b206181dSStefan Haberland dev_err(&device->cdev->dev, 1132b206181dSStefan Haberland "Not all channel paths lead to " 1133b206181dSStefan Haberland "the same device, path %02X leads to " 1134b206181dSStefan Haberland "device %s instead of %s\n", lpm, 1135b206181dSStefan Haberland print_path_uid, print_device_uid); 113655d3a85cSStefan Haberland path_err = -EINVAL; 11375db8440cSStefan Haberland path_data->cablepm |= lpm; 113855d3a85cSStefan Haberland continue; 1139b206181dSStefan Haberland } 1140b206181dSStefan Haberland 1141b206181dSStefan Haberland path_private.conf_data = NULL; 1142b206181dSStefan Haberland path_private.conf_len = 0; 11431da177e4SLinus Torvalds } 11444abb08c2SStefan Weinhuber switch (dasd_eckd_path_access(conf_data, conf_len)) { 11451da177e4SLinus Torvalds case 0x02: 11461da177e4SLinus Torvalds path_data->npm |= lpm; 11471da177e4SLinus Torvalds break; 11481da177e4SLinus Torvalds case 0x03: 11491da177e4SLinus Torvalds path_data->ppm |= lpm; 11501da177e4SLinus Torvalds break; 11511da177e4SLinus Torvalds } 1152a4d26c6aSStefan Weinhuber path_data->opm |= lpm; 11535db8440cSStefan Haberland /* 11545db8440cSStefan Haberland * if the path is used 11555db8440cSStefan Haberland * it should not be in one of the negative lists 11565db8440cSStefan Haberland */ 11575db8440cSStefan Haberland path_data->cablepm &= ~lpm; 11585db8440cSStefan Haberland path_data->hpfpm &= ~lpm; 11595db8440cSStefan Haberland path_data->cuirpm &= ~lpm; 1160b206181dSStefan Haberland 11614abb08c2SStefan Weinhuber if (conf_data != private->conf_data) 11621da177e4SLinus Torvalds kfree(conf_data); 11631da177e4SLinus Torvalds } 1164b206181dSStefan Haberland 116555d3a85cSStefan Haberland return path_err; 11661da177e4SLinus Torvalds } 11671da177e4SLinus Torvalds 1168a4d26c6aSStefan Weinhuber static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm) 1169a4d26c6aSStefan Weinhuber { 1170a4d26c6aSStefan Weinhuber struct dasd_eckd_private *private; 1171a4d26c6aSStefan Weinhuber int mdc; 1172a4d26c6aSStefan Weinhuber u32 fcx_max_data; 1173a4d26c6aSStefan Weinhuber 1174a4d26c6aSStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 1175a4d26c6aSStefan Weinhuber if (private->fcx_max_data) { 1176a4d26c6aSStefan Weinhuber mdc = ccw_device_get_mdc(device->cdev, lpm); 1177a4d26c6aSStefan Weinhuber if ((mdc < 0)) { 1178a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1179a4d26c6aSStefan Weinhuber "Detecting the maximum data size for zHPF " 1180a4d26c6aSStefan Weinhuber "requests failed (rc=%d) for a new path %x\n", 1181a4d26c6aSStefan Weinhuber mdc, lpm); 1182a4d26c6aSStefan Weinhuber return mdc; 1183a4d26c6aSStefan Weinhuber } 1184a4d26c6aSStefan Weinhuber fcx_max_data = mdc * FCX_MAX_DATA_FACTOR; 1185a4d26c6aSStefan Weinhuber if (fcx_max_data < private->fcx_max_data) { 1186a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1187a4d26c6aSStefan Weinhuber "The maximum data size for zHPF requests %u " 1188a4d26c6aSStefan Weinhuber "on a new path %x is below the active maximum " 1189a4d26c6aSStefan Weinhuber "%u\n", fcx_max_data, lpm, 1190a4d26c6aSStefan Weinhuber private->fcx_max_data); 1191a4d26c6aSStefan Weinhuber return -EACCES; 1192a4d26c6aSStefan Weinhuber } 1193a4d26c6aSStefan Weinhuber } 1194a4d26c6aSStefan Weinhuber return 0; 1195a4d26c6aSStefan Weinhuber } 1196a4d26c6aSStefan Weinhuber 1197b206181dSStefan Haberland static int rebuild_device_uid(struct dasd_device *device, 1198b206181dSStefan Haberland struct path_verification_work_data *data) 1199b206181dSStefan Haberland { 1200b206181dSStefan Haberland struct dasd_eckd_private *private; 1201b206181dSStefan Haberland struct dasd_path *path_data; 1202b206181dSStefan Haberland __u8 lpm, opm; 1203b206181dSStefan Haberland int rc; 1204b206181dSStefan Haberland 1205b206181dSStefan Haberland rc = -ENODEV; 1206b206181dSStefan Haberland private = (struct dasd_eckd_private *) device->private; 1207b206181dSStefan Haberland path_data = &device->path_data; 1208b206181dSStefan Haberland opm = device->path_data.opm; 1209b206181dSStefan Haberland 1210b206181dSStefan Haberland for (lpm = 0x80; lpm; lpm >>= 1) { 1211b206181dSStefan Haberland if (!(lpm & opm)) 1212b206181dSStefan Haberland continue; 1213b206181dSStefan Haberland memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1214b206181dSStefan Haberland memset(&data->cqr, 0, sizeof(data->cqr)); 1215b206181dSStefan Haberland data->cqr.cpaddr = &data->ccw; 1216b206181dSStefan Haberland rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1217b206181dSStefan Haberland data->rcd_buffer, 1218b206181dSStefan Haberland lpm); 1219b206181dSStefan Haberland 1220b206181dSStefan Haberland if (rc) { 1221b206181dSStefan Haberland if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */ 1222b206181dSStefan Haberland continue; 1223b206181dSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1224b206181dSStefan Haberland "Read configuration data " 1225b206181dSStefan Haberland "returned error %d", rc); 1226b206181dSStefan Haberland break; 1227b206181dSStefan Haberland } 1228b206181dSStefan Haberland memcpy(private->conf_data, data->rcd_buffer, 1229b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE); 1230b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts(private)) { 1231b206181dSStefan Haberland rc = -ENODEV; 1232b206181dSStefan Haberland } else /* first valid path is enough */ 1233b206181dSStefan Haberland break; 1234b206181dSStefan Haberland } 1235b206181dSStefan Haberland 1236b206181dSStefan Haberland if (!rc) 1237b206181dSStefan Haberland rc = dasd_eckd_generate_uid(device); 1238b206181dSStefan Haberland 1239b206181dSStefan Haberland return rc; 1240b206181dSStefan Haberland } 1241b206181dSStefan Haberland 1242a4d26c6aSStefan Weinhuber static void do_path_verification_work(struct work_struct *work) 1243a4d26c6aSStefan Weinhuber { 1244a4d26c6aSStefan Weinhuber struct path_verification_work_data *data; 1245a4d26c6aSStefan Weinhuber struct dasd_device *device; 1246b206181dSStefan Haberland struct dasd_eckd_private path_private; 1247b206181dSStefan Haberland struct dasd_uid *uid; 1248b206181dSStefan Haberland __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE]; 12495db8440cSStefan Haberland __u8 lpm, opm, npm, ppm, epm, hpfpm, cablepm; 1250a4d26c6aSStefan Weinhuber unsigned long flags; 1251b206181dSStefan Haberland char print_uid[60]; 1252a4d26c6aSStefan Weinhuber int rc; 1253a4d26c6aSStefan Weinhuber 1254a4d26c6aSStefan Weinhuber data = container_of(work, struct path_verification_work_data, worker); 1255a4d26c6aSStefan Weinhuber device = data->device; 1256a4d26c6aSStefan Weinhuber 1257c8d1c0ffSStefan Haberland /* delay path verification until device was resumed */ 1258c8d1c0ffSStefan Haberland if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 1259c8d1c0ffSStefan Haberland schedule_work(work); 1260c8d1c0ffSStefan Haberland return; 1261c8d1c0ffSStefan Haberland } 1262c8d1c0ffSStefan Haberland 1263a4d26c6aSStefan Weinhuber opm = 0; 1264a4d26c6aSStefan Weinhuber npm = 0; 1265a4d26c6aSStefan Weinhuber ppm = 0; 1266a4d26c6aSStefan Weinhuber epm = 0; 12675db8440cSStefan Haberland hpfpm = 0; 12685db8440cSStefan Haberland cablepm = 0; 12695db8440cSStefan Haberland 1270a4d26c6aSStefan Weinhuber for (lpm = 0x80; lpm; lpm >>= 1) { 1271b206181dSStefan Haberland if (!(lpm & data->tbvpm)) 1272b206181dSStefan Haberland continue; 1273b206181dSStefan Haberland memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1274a4d26c6aSStefan Weinhuber memset(&data->cqr, 0, sizeof(data->cqr)); 1275a4d26c6aSStefan Weinhuber data->cqr.cpaddr = &data->ccw; 1276a4d26c6aSStefan Weinhuber rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1277a4d26c6aSStefan Weinhuber data->rcd_buffer, 1278a4d26c6aSStefan Weinhuber lpm); 1279a4d26c6aSStefan Weinhuber if (!rc) { 1280a4d26c6aSStefan Weinhuber switch (dasd_eckd_path_access(data->rcd_buffer, 1281b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE) 1282b206181dSStefan Haberland ) { 1283a4d26c6aSStefan Weinhuber case 0x02: 1284a4d26c6aSStefan Weinhuber npm |= lpm; 1285a4d26c6aSStefan Weinhuber break; 1286a4d26c6aSStefan Weinhuber case 0x03: 1287a4d26c6aSStefan Weinhuber ppm |= lpm; 1288a4d26c6aSStefan Weinhuber break; 1289a4d26c6aSStefan Weinhuber } 1290a4d26c6aSStefan Weinhuber opm |= lpm; 1291a4d26c6aSStefan Weinhuber } else if (rc == -EOPNOTSUPP) { 1292a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1293a4d26c6aSStefan Weinhuber "path verification: No configuration " 1294a4d26c6aSStefan Weinhuber "data retrieved"); 1295a4d26c6aSStefan Weinhuber opm |= lpm; 1296a4d26c6aSStefan Weinhuber } else if (rc == -EAGAIN) { 1297a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1298a4d26c6aSStefan Weinhuber "path verification: device is stopped," 1299a4d26c6aSStefan Weinhuber " try again later"); 1300a4d26c6aSStefan Weinhuber epm |= lpm; 1301a4d26c6aSStefan Weinhuber } else { 1302a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1303a4d26c6aSStefan Weinhuber "Reading device feature codes failed " 1304a4d26c6aSStefan Weinhuber "(rc=%d) for new path %x\n", rc, lpm); 1305a4d26c6aSStefan Weinhuber continue; 1306a4d26c6aSStefan Weinhuber } 1307a4d26c6aSStefan Weinhuber if (verify_fcx_max_data(device, lpm)) { 1308a4d26c6aSStefan Weinhuber opm &= ~lpm; 1309a4d26c6aSStefan Weinhuber npm &= ~lpm; 1310a4d26c6aSStefan Weinhuber ppm &= ~lpm; 13115db8440cSStefan Haberland hpfpm |= lpm; 1312b206181dSStefan Haberland continue; 1313b206181dSStefan Haberland } 1314b206181dSStefan Haberland 1315b206181dSStefan Haberland /* 1316b206181dSStefan Haberland * save conf_data for comparison after 1317b206181dSStefan Haberland * rebuild_device_uid may have changed 1318b206181dSStefan Haberland * the original data 1319b206181dSStefan Haberland */ 1320b206181dSStefan Haberland memcpy(&path_rcd_buf, data->rcd_buffer, 1321b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE); 1322b206181dSStefan Haberland path_private.conf_data = (void *) &path_rcd_buf; 1323b206181dSStefan Haberland path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1324b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts(&path_private)) { 1325b206181dSStefan Haberland path_private.conf_data = NULL; 1326b206181dSStefan Haberland path_private.conf_len = 0; 1327b206181dSStefan Haberland continue; 1328b206181dSStefan Haberland } 1329b206181dSStefan Haberland 1330b206181dSStefan Haberland /* 1331b206181dSStefan Haberland * compare path UID with device UID only if at least 1332b206181dSStefan Haberland * one valid path is left 1333b206181dSStefan Haberland * in other case the device UID may have changed and 1334b206181dSStefan Haberland * the first working path UID will be used as device UID 1335b206181dSStefan Haberland */ 1336b206181dSStefan Haberland if (device->path_data.opm && 1337b206181dSStefan Haberland dasd_eckd_compare_path_uid(device, &path_private)) { 1338b206181dSStefan Haberland /* 1339b206181dSStefan Haberland * the comparison was not successful 1340b206181dSStefan Haberland * rebuild the device UID with at least one 1341b206181dSStefan Haberland * known path in case a z/VM hyperswap command 1342b206181dSStefan Haberland * has changed the device 1343b206181dSStefan Haberland * 1344b206181dSStefan Haberland * after this compare again 1345b206181dSStefan Haberland * 1346b206181dSStefan Haberland * if either the rebuild or the recompare fails 1347b206181dSStefan Haberland * the path can not be used 1348b206181dSStefan Haberland */ 1349b206181dSStefan Haberland if (rebuild_device_uid(device, data) || 1350b206181dSStefan Haberland dasd_eckd_compare_path_uid( 1351b206181dSStefan Haberland device, &path_private)) { 1352b206181dSStefan Haberland uid = &path_private.uid; 1353b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1354b206181dSStefan Haberland snprintf(print_uid, sizeof(print_uid), 1355b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1356b206181dSStefan Haberland uid->vendor, uid->serial, 1357b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1358b206181dSStefan Haberland uid->vduit); 1359b206181dSStefan Haberland else 1360b206181dSStefan Haberland snprintf(print_uid, sizeof(print_uid), 1361b206181dSStefan Haberland "%s.%s.%04x.%02x", 1362b206181dSStefan Haberland uid->vendor, uid->serial, 1363b206181dSStefan Haberland uid->ssid, 1364b206181dSStefan Haberland uid->real_unit_addr); 1365b206181dSStefan Haberland dev_err(&device->cdev->dev, 1366b206181dSStefan Haberland "The newly added channel path %02X " 1367b206181dSStefan Haberland "will not be used because it leads " 1368b206181dSStefan Haberland "to a different device %s\n", 1369b206181dSStefan Haberland lpm, print_uid); 1370b206181dSStefan Haberland opm &= ~lpm; 1371b206181dSStefan Haberland npm &= ~lpm; 1372b206181dSStefan Haberland ppm &= ~lpm; 13735db8440cSStefan Haberland cablepm |= lpm; 1374b206181dSStefan Haberland continue; 1375a4d26c6aSStefan Weinhuber } 1376a4d26c6aSStefan Weinhuber } 1377b206181dSStefan Haberland 1378a4d26c6aSStefan Weinhuber /* 1379a4d26c6aSStefan Weinhuber * There is a small chance that a path is lost again between 1380a4d26c6aSStefan Weinhuber * above path verification and the following modification of 1381a4d26c6aSStefan Weinhuber * the device opm mask. We could avoid that race here by using 1382a4d26c6aSStefan Weinhuber * yet another path mask, but we rather deal with this unlikely 1383a4d26c6aSStefan Weinhuber * situation in dasd_start_IO. 1384a4d26c6aSStefan Weinhuber */ 1385a4d26c6aSStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1386a4d26c6aSStefan Weinhuber if (!device->path_data.opm && opm) { 1387a4d26c6aSStefan Weinhuber device->path_data.opm = opm; 13885db8440cSStefan Haberland device->path_data.cablepm &= ~opm; 13895db8440cSStefan Haberland device->path_data.cuirpm &= ~opm; 13905db8440cSStefan Haberland device->path_data.hpfpm &= ~opm; 1391a4d26c6aSStefan Weinhuber dasd_generic_path_operational(device); 13925db8440cSStefan Haberland } else { 1393a4d26c6aSStefan Weinhuber device->path_data.opm |= opm; 13945db8440cSStefan Haberland device->path_data.cablepm &= ~opm; 13955db8440cSStefan Haberland device->path_data.cuirpm &= ~opm; 13965db8440cSStefan Haberland device->path_data.hpfpm &= ~opm; 13975db8440cSStefan Haberland } 1398a4d26c6aSStefan Weinhuber device->path_data.npm |= npm; 1399a4d26c6aSStefan Weinhuber device->path_data.ppm |= ppm; 1400a4d26c6aSStefan Weinhuber device->path_data.tbvpm |= epm; 14015db8440cSStefan Haberland device->path_data.cablepm |= cablepm; 14025db8440cSStefan Haberland device->path_data.hpfpm |= hpfpm; 1403a4d26c6aSStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1404b206181dSStefan Haberland } 1405a4d26c6aSStefan Weinhuber 1406a4d26c6aSStefan Weinhuber dasd_put_device(device); 1407a4d26c6aSStefan Weinhuber if (data->isglobal) 1408a4d26c6aSStefan Weinhuber mutex_unlock(&dasd_path_verification_mutex); 1409a4d26c6aSStefan Weinhuber else 1410a4d26c6aSStefan Weinhuber kfree(data); 1411a4d26c6aSStefan Weinhuber } 1412a4d26c6aSStefan Weinhuber 1413a4d26c6aSStefan Weinhuber static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm) 1414a4d26c6aSStefan Weinhuber { 1415a4d26c6aSStefan Weinhuber struct path_verification_work_data *data; 1416a4d26c6aSStefan Weinhuber 1417a4d26c6aSStefan Weinhuber data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA); 1418a4d26c6aSStefan Weinhuber if (!data) { 1419a4d26c6aSStefan Weinhuber if (mutex_trylock(&dasd_path_verification_mutex)) { 1420a4d26c6aSStefan Weinhuber data = path_verification_worker; 1421a4d26c6aSStefan Weinhuber data->isglobal = 1; 1422a4d26c6aSStefan Weinhuber } else 1423a4d26c6aSStefan Weinhuber return -ENOMEM; 1424a4d26c6aSStefan Weinhuber } else { 1425a4d26c6aSStefan Weinhuber memset(data, 0, sizeof(*data)); 1426a4d26c6aSStefan Weinhuber data->isglobal = 0; 1427a4d26c6aSStefan Weinhuber } 1428a4d26c6aSStefan Weinhuber INIT_WORK(&data->worker, do_path_verification_work); 1429a4d26c6aSStefan Weinhuber dasd_get_device(device); 1430a4d26c6aSStefan Weinhuber data->device = device; 1431a4d26c6aSStefan Weinhuber data->tbvpm = lpm; 1432a4d26c6aSStefan Weinhuber schedule_work(&data->worker); 1433a4d26c6aSStefan Weinhuber return 0; 1434a4d26c6aSStefan Weinhuber } 1435a4d26c6aSStefan Weinhuber 14368e09f215SStefan Weinhuber static int dasd_eckd_read_features(struct dasd_device *device) 14378e09f215SStefan Weinhuber { 14388e09f215SStefan Weinhuber struct dasd_psf_prssd_data *prssdp; 14398e09f215SStefan Weinhuber struct dasd_rssd_features *features; 14408e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 14418e09f215SStefan Weinhuber struct ccw1 *ccw; 14428e09f215SStefan Weinhuber int rc; 14438e09f215SStefan Weinhuber struct dasd_eckd_private *private; 14448e09f215SStefan Weinhuber 14458e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 144668d1e5f0SStefan Weinhuber memset(&private->features, 0, sizeof(struct dasd_rssd_features)); 144768b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 14488e09f215SStefan Weinhuber (sizeof(struct dasd_psf_prssd_data) + 14498e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)), 14508e09f215SStefan Weinhuber device); 14518e09f215SStefan Weinhuber if (IS_ERR(cqr)) { 1452b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " 1453b8ed5dd5SStefan Haberland "allocate initialization request"); 14548e09f215SStefan Weinhuber return PTR_ERR(cqr); 14558e09f215SStefan Weinhuber } 14568e09f215SStefan Weinhuber cqr->startdev = device; 14578e09f215SStefan Weinhuber cqr->memdev = device; 14588e09f215SStefan Weinhuber cqr->block = NULL; 1459eb6e199bSStefan Weinhuber cqr->retries = 256; 14608e09f215SStefan Weinhuber cqr->expires = 10 * HZ; 14618e09f215SStefan Weinhuber 14628e09f215SStefan Weinhuber /* Prepare for Read Subsystem Data */ 14638e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 14648e09f215SStefan Weinhuber memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 14658e09f215SStefan Weinhuber prssdp->order = PSF_ORDER_PRSSD; 14668e09f215SStefan Weinhuber prssdp->suborder = 0x41; /* Read Feature Codes */ 14678e09f215SStefan Weinhuber /* all other bytes of prssdp must be zero */ 14688e09f215SStefan Weinhuber 14698e09f215SStefan Weinhuber ccw = cqr->cpaddr; 14708e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PSF; 14718e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_psf_prssd_data); 14728e09f215SStefan Weinhuber ccw->flags |= CCW_FLAG_CC; 14738e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) prssdp; 14748e09f215SStefan Weinhuber 14758e09f215SStefan Weinhuber /* Read Subsystem Data - feature codes */ 14768e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 14778e09f215SStefan Weinhuber memset(features, 0, sizeof(struct dasd_rssd_features)); 14788e09f215SStefan Weinhuber 14798e09f215SStefan Weinhuber ccw++; 14808e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RSSD; 14818e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_rssd_features); 14828e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) features; 14838e09f215SStefan Weinhuber 14841aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 14858e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 14868e09f215SStefan Weinhuber rc = dasd_sleep_on(cqr); 14878e09f215SStefan Weinhuber if (rc == 0) { 14888e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 14898e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 14908e09f215SStefan Weinhuber memcpy(&private->features, features, 14918e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)); 149268d1e5f0SStefan Weinhuber } else 149368d1e5f0SStefan Weinhuber dev_warn(&device->cdev->dev, "Reading device feature codes" 149468d1e5f0SStefan Weinhuber " failed with rc=%d\n", rc); 14958e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 14968e09f215SStefan Weinhuber return rc; 14978e09f215SStefan Weinhuber } 14988e09f215SStefan Weinhuber 14998e09f215SStefan Weinhuber 15003d052595SHorst Hummel /* 150140545573SHorst Hummel * Build CP for Perform Subsystem Function - SSC. 150240545573SHorst Hummel */ 1503f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, 1504f3eb5384SStefan Weinhuber int enable_pav) 150540545573SHorst Hummel { 150640545573SHorst Hummel struct dasd_ccw_req *cqr; 150740545573SHorst Hummel struct dasd_psf_ssc_data *psf_ssc_data; 150840545573SHorst Hummel struct ccw1 *ccw; 150940545573SHorst Hummel 151068b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 151140545573SHorst Hummel sizeof(struct dasd_psf_ssc_data), 151240545573SHorst Hummel device); 151340545573SHorst Hummel 151440545573SHorst Hummel if (IS_ERR(cqr)) { 1515fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 151640545573SHorst Hummel "Could not allocate PSF-SSC request"); 151740545573SHorst Hummel return cqr; 151840545573SHorst Hummel } 151940545573SHorst Hummel psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 152040545573SHorst Hummel psf_ssc_data->order = PSF_ORDER_SSC; 1521626350b6SStefan Weinhuber psf_ssc_data->suborder = 0xc0; 1522f3eb5384SStefan Weinhuber if (enable_pav) { 1523626350b6SStefan Weinhuber psf_ssc_data->suborder |= 0x08; 15248e09f215SStefan Weinhuber psf_ssc_data->reserved[0] = 0x88; 1525f3eb5384SStefan Weinhuber } 152640545573SHorst Hummel ccw = cqr->cpaddr; 152740545573SHorst Hummel ccw->cmd_code = DASD_ECKD_CCW_PSF; 152840545573SHorst Hummel ccw->cda = (__u32)(addr_t)psf_ssc_data; 152940545573SHorst Hummel ccw->count = 66; 153040545573SHorst Hummel 15318e09f215SStefan Weinhuber cqr->startdev = device; 15328e09f215SStefan Weinhuber cqr->memdev = device; 15338e09f215SStefan Weinhuber cqr->block = NULL; 1534eb6e199bSStefan Weinhuber cqr->retries = 256; 153540545573SHorst Hummel cqr->expires = 10*HZ; 15361aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 153740545573SHorst Hummel cqr->status = DASD_CQR_FILLED; 153840545573SHorst Hummel return cqr; 153940545573SHorst Hummel } 154040545573SHorst Hummel 154140545573SHorst Hummel /* 154240545573SHorst Hummel * Perform Subsystem Function. 154340545573SHorst Hummel * It is necessary to trigger CIO for channel revalidation since this 154440545573SHorst Hummel * call might change behaviour of DASD devices. 154540545573SHorst Hummel */ 154640545573SHorst Hummel static int 154712d7b107SStefan Haberland dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav, 154812d7b107SStefan Haberland unsigned long flags) 154940545573SHorst Hummel { 155040545573SHorst Hummel struct dasd_ccw_req *cqr; 155140545573SHorst Hummel int rc; 155240545573SHorst Hummel 1553f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_psf_ssc(device, enable_pav); 155440545573SHorst Hummel if (IS_ERR(cqr)) 155540545573SHorst Hummel return PTR_ERR(cqr); 155640545573SHorst Hummel 155712d7b107SStefan Haberland /* 155812d7b107SStefan Haberland * set flags e.g. turn on failfast, to prevent blocking 155912d7b107SStefan Haberland * the calling function should handle failed requests 156012d7b107SStefan Haberland */ 156112d7b107SStefan Haberland cqr->flags |= flags; 156212d7b107SStefan Haberland 156340545573SHorst Hummel rc = dasd_sleep_on(cqr); 156440545573SHorst Hummel if (!rc) 156540545573SHorst Hummel /* trigger CIO to reprobe devices */ 156640545573SHorst Hummel css_schedule_reprobe(); 156712d7b107SStefan Haberland else if (cqr->intrc == -EAGAIN) 156812d7b107SStefan Haberland rc = -EAGAIN; 156912d7b107SStefan Haberland 15708e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 157140545573SHorst Hummel return rc; 157240545573SHorst Hummel } 157340545573SHorst Hummel 157440545573SHorst Hummel /* 157540545573SHorst Hummel * Valide storage server of current device. 157640545573SHorst Hummel */ 157712d7b107SStefan Haberland static int dasd_eckd_validate_server(struct dasd_device *device, 157812d7b107SStefan Haberland unsigned long flags) 157940545573SHorst Hummel { 158040545573SHorst Hummel int rc; 15818e09f215SStefan Weinhuber struct dasd_eckd_private *private; 1582f3eb5384SStefan Weinhuber int enable_pav; 158340545573SHorst Hummel 1584f9f8d02fSStefan Haberland private = (struct dasd_eckd_private *) device->private; 1585f9f8d02fSStefan Haberland if (private->uid.type == UA_BASE_PAV_ALIAS || 1586f9f8d02fSStefan Haberland private->uid.type == UA_HYPER_PAV_ALIAS) 158712d7b107SStefan Haberland return 0; 158840545573SHorst Hummel if (dasd_nopav || MACHINE_IS_VM) 1589f3eb5384SStefan Weinhuber enable_pav = 0; 1590f3eb5384SStefan Weinhuber else 1591f3eb5384SStefan Weinhuber enable_pav = 1; 159212d7b107SStefan Haberland rc = dasd_eckd_psf_ssc(device, enable_pav, flags); 1593eb6e199bSStefan Weinhuber 159440545573SHorst Hummel /* may be requested feature is not available on server, 159540545573SHorst Hummel * therefore just report error and go ahead */ 1596b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " 1597b8ed5dd5SStefan Haberland "returned rc=%d", private->uid.ssid, rc); 159812d7b107SStefan Haberland return rc; 159940545573SHorst Hummel } 160040545573SHorst Hummel 1601f1633031SStefan Haberland /* 1602f1633031SStefan Haberland * worker to do a validate server in case of a lost pathgroup 1603f1633031SStefan Haberland */ 1604f1633031SStefan Haberland static void dasd_eckd_do_validate_server(struct work_struct *work) 1605f1633031SStefan Haberland { 1606f1633031SStefan Haberland struct dasd_device *device = container_of(work, struct dasd_device, 1607f1633031SStefan Haberland kick_validate); 1608ea4da6eaSStefan Haberland unsigned long flags = 0; 1609ea4da6eaSStefan Haberland 1610ea4da6eaSStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &flags); 1611ea4da6eaSStefan Haberland if (dasd_eckd_validate_server(device, flags) 161212d7b107SStefan Haberland == -EAGAIN) { 161312d7b107SStefan Haberland /* schedule worker again if failed */ 161412d7b107SStefan Haberland schedule_work(&device->kick_validate); 161512d7b107SStefan Haberland return; 161612d7b107SStefan Haberland } 161712d7b107SStefan Haberland 1618f1633031SStefan Haberland dasd_put_device(device); 1619f1633031SStefan Haberland } 1620f1633031SStefan Haberland 1621f1633031SStefan Haberland static void dasd_eckd_kick_validate_server(struct dasd_device *device) 1622f1633031SStefan Haberland { 1623f1633031SStefan Haberland dasd_get_device(device); 162425e2cf1cSStefan Haberland /* exit if device not online or in offline processing */ 162525e2cf1cSStefan Haberland if (test_bit(DASD_FLAG_OFFLINE, &device->flags) || 162625e2cf1cSStefan Haberland device->state < DASD_STATE_ONLINE) { 162725e2cf1cSStefan Haberland dasd_put_device(device); 162825e2cf1cSStefan Haberland return; 162925e2cf1cSStefan Haberland } 1630f1633031SStefan Haberland /* queue call to do_validate_server to the kernel event daemon. */ 1631f2608cd4SStefan Haberland if (!schedule_work(&device->kick_validate)) 1632f2608cd4SStefan Haberland dasd_put_device(device); 1633f1633031SStefan Haberland } 1634f1633031SStefan Haberland 1635ef19298bSStefan Weinhuber static u32 get_fcx_max_data(struct dasd_device *device) 1636ef19298bSStefan Weinhuber { 1637ef19298bSStefan Weinhuber int tpm, mdc; 1638ef19298bSStefan Weinhuber int fcx_in_css, fcx_in_gneq, fcx_in_features; 1639ef19298bSStefan Weinhuber struct dasd_eckd_private *private; 1640ef19298bSStefan Weinhuber 1641ef19298bSStefan Weinhuber if (dasd_nofcx) 1642ef19298bSStefan Weinhuber return 0; 1643ef19298bSStefan Weinhuber /* is transport mode supported? */ 1644ef19298bSStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 1645ef19298bSStefan Weinhuber fcx_in_css = css_general_characteristics.fcx; 1646ef19298bSStefan Weinhuber fcx_in_gneq = private->gneq->reserved2[7] & 0x04; 1647ef19298bSStefan Weinhuber fcx_in_features = private->features.feature[40] & 0x80; 1648ef19298bSStefan Weinhuber tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; 1649ef19298bSStefan Weinhuber 1650ef19298bSStefan Weinhuber if (!tpm) 1651ef19298bSStefan Weinhuber return 0; 1652ef19298bSStefan Weinhuber 1653ef19298bSStefan Weinhuber mdc = ccw_device_get_mdc(device->cdev, 0); 1654ef19298bSStefan Weinhuber if (mdc < 0) { 1655ef19298bSStefan Weinhuber dev_warn(&device->cdev->dev, "Detecting the maximum supported" 1656ef19298bSStefan Weinhuber " data size for zHPF requests failed\n"); 1657ef19298bSStefan Weinhuber return 0; 1658ef19298bSStefan Weinhuber } else 1659ef19298bSStefan Weinhuber return mdc * FCX_MAX_DATA_FACTOR; 1660ef19298bSStefan Weinhuber } 1661ef19298bSStefan Weinhuber 166240545573SHorst Hummel /* 16633d052595SHorst Hummel * Check device characteristics. 16643d052595SHorst Hummel * If the device is accessible using ECKD discipline, the device is enabled. 16653d052595SHorst Hummel */ 16661da177e4SLinus Torvalds static int 16671da177e4SLinus Torvalds dasd_eckd_check_characteristics(struct dasd_device *device) 16681da177e4SLinus Torvalds { 16691da177e4SLinus Torvalds struct dasd_eckd_private *private; 16708e09f215SStefan Weinhuber struct dasd_block *block; 16712dedf0d9SStefan Haberland struct dasd_uid temp_uid; 1672f9f8d02fSStefan Haberland int rc, i; 167333b62a30SStefan Weinhuber int readonly; 16747c8faa86SStefan Haberland unsigned long value; 16751da177e4SLinus Torvalds 1676f1633031SStefan Haberland /* setup work queue for validate server*/ 1677f1633031SStefan Haberland INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server); 1678f1633031SStefan Haberland 1679454e1fa1SPeter Oberparleiter if (!ccw_device_is_pathgroup(device->cdev)) { 1680454e1fa1SPeter Oberparleiter dev_warn(&device->cdev->dev, 1681454e1fa1SPeter Oberparleiter "A channel path group could not be established\n"); 1682454e1fa1SPeter Oberparleiter return -EIO; 1683454e1fa1SPeter Oberparleiter } 1684454e1fa1SPeter Oberparleiter if (!ccw_device_is_multipath(device->cdev)) { 1685454e1fa1SPeter Oberparleiter dev_info(&device->cdev->dev, 1686454e1fa1SPeter Oberparleiter "The DASD is not operating in multipath mode\n"); 1687454e1fa1SPeter Oberparleiter } 16881da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 168992636b15SSebastian Ott if (!private) { 169092636b15SSebastian Ott private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); 169192636b15SSebastian Ott if (!private) { 1692fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1693fc19f381SStefan Haberland "Allocating memory for private DASD data " 1694fc19f381SStefan Haberland "failed\n"); 16951da177e4SLinus Torvalds return -ENOMEM; 16961da177e4SLinus Torvalds } 16971da177e4SLinus Torvalds device->private = (void *) private; 169892636b15SSebastian Ott } else { 169992636b15SSebastian Ott memset(private, 0, sizeof(*private)); 17001da177e4SLinus Torvalds } 17011da177e4SLinus Torvalds /* Invalidate status of initial analysis. */ 17021da177e4SLinus Torvalds private->init_cqr_status = -1; 17031da177e4SLinus Torvalds /* Set default cache operations. */ 17041da177e4SLinus Torvalds private->attrib.operation = DASD_NORMAL_CACHE; 17051da177e4SLinus Torvalds private->attrib.nr_cyl = 0; 17061da177e4SLinus Torvalds 170740545573SHorst Hummel /* Read Configuration Data */ 170840545573SHorst Hummel rc = dasd_eckd_read_conf(device); 170940545573SHorst Hummel if (rc) 17108e09f215SStefan Weinhuber goto out_err1; 171140545573SHorst Hummel 17127c8faa86SStefan Haberland /* set default timeout */ 17137c8faa86SStefan Haberland device->default_expires = DASD_EXPIRES; 17141f1ee9adSHannes Reinecke /* set default retry count */ 17151f1ee9adSHannes Reinecke device->default_retries = DASD_RETRIES; 17161f1ee9adSHannes Reinecke 17177c8faa86SStefan Haberland if (private->gneq) { 17187c8faa86SStefan Haberland value = 1; 17197c8faa86SStefan Haberland for (i = 0; i < private->gneq->timeout.value; i++) 17207c8faa86SStefan Haberland value = 10 * value; 17217c8faa86SStefan Haberland value = value * private->gneq->timeout.number; 17227c8faa86SStefan Haberland /* do not accept useless values */ 17237c8faa86SStefan Haberland if (value != 0 && value <= DASD_EXPIRES_MAX) 17247c8faa86SStefan Haberland device->default_expires = value; 17257c8faa86SStefan Haberland } 17267c8faa86SStefan Haberland 17272dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 17282dedf0d9SStefan Haberland if (temp_uid.type == UA_BASE_DEVICE) { 17298e09f215SStefan Weinhuber block = dasd_alloc_block(); 17308e09f215SStefan Weinhuber if (IS_ERR(block)) { 1731b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1732b8ed5dd5SStefan Haberland "could not allocate dasd " 1733b8ed5dd5SStefan Haberland "block structure"); 17348e09f215SStefan Weinhuber rc = PTR_ERR(block); 17358e09f215SStefan Weinhuber goto out_err1; 17368e09f215SStefan Weinhuber } 17378e09f215SStefan Weinhuber device->block = block; 17388e09f215SStefan Weinhuber block->base = device; 17398e09f215SStefan Weinhuber } 17408e09f215SStefan Weinhuber 1741f9f8d02fSStefan Haberland /* register lcu with alias handling, enable PAV */ 1742f9f8d02fSStefan Haberland rc = dasd_alias_make_device_known_to_lcu(device); 1743f9f8d02fSStefan Haberland if (rc) 17448e09f215SStefan Weinhuber goto out_err2; 1745f9f8d02fSStefan Haberland 174612d7b107SStefan Haberland dasd_eckd_validate_server(device, 0); 1747f4ac1d02SStefan Weinhuber 1748f4ac1d02SStefan Weinhuber /* device may report different configuration data after LCU setup */ 1749f4ac1d02SStefan Weinhuber rc = dasd_eckd_read_conf(device); 175040545573SHorst Hummel if (rc) 17518e09f215SStefan Weinhuber goto out_err3; 17528e09f215SStefan Weinhuber 17538e09f215SStefan Weinhuber /* Read Feature Codes */ 175468d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 175540545573SHorst Hummel 17561da177e4SLinus Torvalds /* Read Device Characteristics */ 175768b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 175868b781feSStefan Haberland &private->rdc_data, 64); 17598e09f215SStefan Weinhuber if (rc) { 1760b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1761b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 17628e09f215SStefan Weinhuber goto out_err3; 17638e09f215SStefan Weinhuber } 176434cd551aSStefan Haberland 176534cd551aSStefan Haberland if ((device->features & DASD_FEATURE_USERAW) && 176634cd551aSStefan Haberland !(private->rdc_data.facilities.RT_in_LR)) { 176734cd551aSStefan Haberland dev_err(&device->cdev->dev, "The storage server does not " 176834cd551aSStefan Haberland "support raw-track access\n"); 176934cd551aSStefan Haberland rc = -EINVAL; 177034cd551aSStefan Haberland goto out_err3; 177134cd551aSStefan Haberland } 177234cd551aSStefan Haberland 1773817f2c84SNikanth Karthikesan /* find the valid cylinder size */ 1774b44b0ab3SStefan Weinhuber if (private->rdc_data.no_cyl == LV_COMPAT_CYL && 1775b44b0ab3SStefan Weinhuber private->rdc_data.long_no_cyl) 1776b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.long_no_cyl; 1777b44b0ab3SStefan Weinhuber else 1778b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.no_cyl; 1779b44b0ab3SStefan Weinhuber 1780ef19298bSStefan Weinhuber private->fcx_max_data = get_fcx_max_data(device); 1781ef19298bSStefan Weinhuber 178233b62a30SStefan Weinhuber readonly = dasd_device_is_ro(device); 178333b62a30SStefan Weinhuber if (readonly) 178433b62a30SStefan Weinhuber set_bit(DASD_FLAG_DEVICE_RO, &device->flags); 178533b62a30SStefan Weinhuber 1786fc19f381SStefan Haberland dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " 178733b62a30SStefan Weinhuber "with %d cylinders, %d heads, %d sectors%s\n", 17881da177e4SLinus Torvalds private->rdc_data.dev_type, 17891da177e4SLinus Torvalds private->rdc_data.dev_model, 17901da177e4SLinus Torvalds private->rdc_data.cu_type, 17911da177e4SLinus Torvalds private->rdc_data.cu_model.model, 1792b44b0ab3SStefan Weinhuber private->real_cyl, 17931da177e4SLinus Torvalds private->rdc_data.trk_per_cyl, 179433b62a30SStefan Weinhuber private->rdc_data.sec_per_trk, 179533b62a30SStefan Weinhuber readonly ? ", read-only device" : ""); 17968e09f215SStefan Weinhuber return 0; 17978e09f215SStefan Weinhuber 17988e09f215SStefan Weinhuber out_err3: 17998e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 18008e09f215SStefan Weinhuber out_err2: 18018e09f215SStefan Weinhuber dasd_free_block(device->block); 18028e09f215SStefan Weinhuber device->block = NULL; 18038e09f215SStefan Weinhuber out_err1: 18044abb08c2SStefan Weinhuber kfree(private->conf_data); 18058e09f215SStefan Weinhuber kfree(device->private); 18068e09f215SStefan Weinhuber device->private = NULL; 18073d052595SHorst Hummel return rc; 18081da177e4SLinus Torvalds } 18091da177e4SLinus Torvalds 18108e09f215SStefan Weinhuber static void dasd_eckd_uncheck_device(struct dasd_device *device) 18118e09f215SStefan Weinhuber { 18124abb08c2SStefan Weinhuber struct dasd_eckd_private *private; 18134abb08c2SStefan Weinhuber 18144abb08c2SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 18158e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 18164abb08c2SStefan Weinhuber private->ned = NULL; 18174abb08c2SStefan Weinhuber private->sneq = NULL; 18184abb08c2SStefan Weinhuber private->vdsneq = NULL; 18194abb08c2SStefan Weinhuber private->gneq = NULL; 18204abb08c2SStefan Weinhuber private->conf_len = 0; 18214abb08c2SStefan Weinhuber kfree(private->conf_data); 18224abb08c2SStefan Weinhuber private->conf_data = NULL; 18238e09f215SStefan Weinhuber } 18248e09f215SStefan Weinhuber 18251da177e4SLinus Torvalds static struct dasd_ccw_req * 18261da177e4SLinus Torvalds dasd_eckd_analysis_ccw(struct dasd_device *device) 18271da177e4SLinus Torvalds { 18281da177e4SLinus Torvalds struct dasd_eckd_private *private; 18291da177e4SLinus Torvalds struct eckd_count *count_data; 18301da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 18311da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 18321da177e4SLinus Torvalds struct ccw1 *ccw; 18331da177e4SLinus Torvalds int cplength, datasize; 18341da177e4SLinus Torvalds int i; 18351da177e4SLinus Torvalds 18361da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 18371da177e4SLinus Torvalds 18381da177e4SLinus Torvalds cplength = 8; 18391da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 184068b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 18411da177e4SLinus Torvalds if (IS_ERR(cqr)) 18421da177e4SLinus Torvalds return cqr; 18431da177e4SLinus Torvalds ccw = cqr->cpaddr; 18441da177e4SLinus Torvalds /* Define extent for the first 3 tracks. */ 18451da177e4SLinus Torvalds define_extent(ccw++, cqr->data, 0, 2, 18461da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device); 18471da177e4SLinus Torvalds LO_data = cqr->data + sizeof(struct DE_eckd_data); 18481da177e4SLinus Torvalds /* Locate record for the first 4 records on track 0. */ 18491da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18501da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 0, 0, 4, 18511da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 18521da177e4SLinus Torvalds 18531da177e4SLinus Torvalds count_data = private->count_area; 18541da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 18551da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18561da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 18571da177e4SLinus Torvalds ccw->flags = 0; 18581da177e4SLinus Torvalds ccw->count = 8; 18591da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 18601da177e4SLinus Torvalds ccw++; 18611da177e4SLinus Torvalds count_data++; 18621da177e4SLinus Torvalds } 18631da177e4SLinus Torvalds 18641da177e4SLinus Torvalds /* Locate record for the first record on track 2. */ 18651da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18661da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 2, 0, 1, 18671da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 18681da177e4SLinus Torvalds /* Read count ccw. */ 18691da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18701da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 18711da177e4SLinus Torvalds ccw->flags = 0; 18721da177e4SLinus Torvalds ccw->count = 8; 18731da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 18741da177e4SLinus Torvalds 18758e09f215SStefan Weinhuber cqr->block = NULL; 18768e09f215SStefan Weinhuber cqr->startdev = device; 18778e09f215SStefan Weinhuber cqr->memdev = device; 1878eb6e199bSStefan Weinhuber cqr->retries = 255; 18791aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 18801da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 18811da177e4SLinus Torvalds return cqr; 18821da177e4SLinus Torvalds } 18831da177e4SLinus Torvalds 1884eb6e199bSStefan Weinhuber /* differentiate between 'no record found' and any other error */ 1885eb6e199bSStefan Weinhuber static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) 1886eb6e199bSStefan Weinhuber { 1887eb6e199bSStefan Weinhuber char *sense; 1888eb6e199bSStefan Weinhuber if (init_cqr->status == DASD_CQR_DONE) 1889eb6e199bSStefan Weinhuber return INIT_CQR_OK; 1890eb6e199bSStefan Weinhuber else if (init_cqr->status == DASD_CQR_NEED_ERP || 1891eb6e199bSStefan Weinhuber init_cqr->status == DASD_CQR_FAILED) { 1892eb6e199bSStefan Weinhuber sense = dasd_get_sense(&init_cqr->irb); 1893eb6e199bSStefan Weinhuber if (sense && (sense[1] & SNS1_NO_REC_FOUND)) 1894eb6e199bSStefan Weinhuber return INIT_CQR_UNFORMATTED; 1895eb6e199bSStefan Weinhuber else 1896eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 1897eb6e199bSStefan Weinhuber } else 1898eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 1899eb6e199bSStefan Weinhuber } 1900eb6e199bSStefan Weinhuber 19011da177e4SLinus Torvalds /* 19021da177e4SLinus Torvalds * This is the callback function for the init_analysis cqr. It saves 19031da177e4SLinus Torvalds * the status of the initial analysis ccw before it frees it and kicks 19041da177e4SLinus Torvalds * the device to continue the startup sequence. This will call 19051da177e4SLinus Torvalds * dasd_eckd_do_analysis again (if the devices has not been marked 19061da177e4SLinus Torvalds * for deletion in the meantime). 19071da177e4SLinus Torvalds */ 1908eb6e199bSStefan Weinhuber static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, 1909eb6e199bSStefan Weinhuber void *data) 19101da177e4SLinus Torvalds { 19111da177e4SLinus Torvalds struct dasd_eckd_private *private; 19121da177e4SLinus Torvalds struct dasd_device *device; 19131da177e4SLinus Torvalds 19148e09f215SStefan Weinhuber device = init_cqr->startdev; 19151da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 1916eb6e199bSStefan Weinhuber private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); 19171da177e4SLinus Torvalds dasd_sfree_request(init_cqr, device); 19181da177e4SLinus Torvalds dasd_kick_device(device); 19191da177e4SLinus Torvalds } 19201da177e4SLinus Torvalds 1921eb6e199bSStefan Weinhuber static int dasd_eckd_start_analysis(struct dasd_block *block) 19221da177e4SLinus Torvalds { 19231da177e4SLinus Torvalds struct dasd_ccw_req *init_cqr; 19241da177e4SLinus Torvalds 19258e09f215SStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(block->base); 19261da177e4SLinus Torvalds if (IS_ERR(init_cqr)) 19271da177e4SLinus Torvalds return PTR_ERR(init_cqr); 19281da177e4SLinus Torvalds init_cqr->callback = dasd_eckd_analysis_callback; 19291da177e4SLinus Torvalds init_cqr->callback_data = NULL; 19301da177e4SLinus Torvalds init_cqr->expires = 5*HZ; 1931eb6e199bSStefan Weinhuber /* first try without ERP, so we can later handle unformatted 1932eb6e199bSStefan Weinhuber * devices as special case 1933eb6e199bSStefan Weinhuber */ 1934eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); 1935eb6e199bSStefan Weinhuber init_cqr->retries = 0; 19361da177e4SLinus Torvalds dasd_add_request_head(init_cqr); 19371da177e4SLinus Torvalds return -EAGAIN; 19381da177e4SLinus Torvalds } 19391da177e4SLinus Torvalds 1940eb6e199bSStefan Weinhuber static int dasd_eckd_end_analysis(struct dasd_block *block) 19411da177e4SLinus Torvalds { 19428e09f215SStefan Weinhuber struct dasd_device *device; 19431da177e4SLinus Torvalds struct dasd_eckd_private *private; 19441da177e4SLinus Torvalds struct eckd_count *count_area; 19451da177e4SLinus Torvalds unsigned int sb, blk_per_trk; 19461da177e4SLinus Torvalds int status, i; 1947eb6e199bSStefan Weinhuber struct dasd_ccw_req *init_cqr; 19481da177e4SLinus Torvalds 19498e09f215SStefan Weinhuber device = block->base; 19501da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 19511da177e4SLinus Torvalds status = private->init_cqr_status; 19521da177e4SLinus Torvalds private->init_cqr_status = -1; 1953eb6e199bSStefan Weinhuber if (status == INIT_CQR_ERROR) { 1954eb6e199bSStefan Weinhuber /* try again, this time with full ERP */ 1955eb6e199bSStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(device); 1956eb6e199bSStefan Weinhuber dasd_sleep_on(init_cqr); 1957eb6e199bSStefan Weinhuber status = dasd_eckd_analysis_evaluation(init_cqr); 1958eb6e199bSStefan Weinhuber dasd_sfree_request(init_cqr, device); 1959eb6e199bSStefan Weinhuber } 1960eb6e199bSStefan Weinhuber 1961e4dbb0f2SStefan Haberland if (device->features & DASD_FEATURE_USERAW) { 1962e4dbb0f2SStefan Haberland block->bp_block = DASD_RAW_BLOCKSIZE; 1963e4dbb0f2SStefan Haberland blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; 1964e4dbb0f2SStefan Haberland block->s2b_shift = 3; 1965e4dbb0f2SStefan Haberland goto raw; 1966e4dbb0f2SStefan Haberland } 1967e4dbb0f2SStefan Haberland 1968eb6e199bSStefan Weinhuber if (status == INIT_CQR_UNFORMATTED) { 1969eb6e199bSStefan Weinhuber dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); 19701da177e4SLinus Torvalds return -EMEDIUMTYPE; 1971eb6e199bSStefan Weinhuber } else if (status == INIT_CQR_ERROR) { 1972eb6e199bSStefan Weinhuber dev_err(&device->cdev->dev, 1973eb6e199bSStefan Weinhuber "Detecting the DASD disk layout failed because " 1974eb6e199bSStefan Weinhuber "of an I/O error\n"); 1975eb6e199bSStefan Weinhuber return -EIO; 19761da177e4SLinus Torvalds } 19771da177e4SLinus Torvalds 19781da177e4SLinus Torvalds private->uses_cdl = 1; 19791da177e4SLinus Torvalds /* Check Track 0 for Compatible Disk Layout */ 19801da177e4SLinus Torvalds count_area = NULL; 19811da177e4SLinus Torvalds for (i = 0; i < 3; i++) { 19821da177e4SLinus Torvalds if (private->count_area[i].kl != 4 || 19833bc9fef9SStefan Haberland private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 || 19843bc9fef9SStefan Haberland private->count_area[i].cyl != 0 || 19853bc9fef9SStefan Haberland private->count_area[i].head != count_area_head[i] || 19863bc9fef9SStefan Haberland private->count_area[i].record != count_area_rec[i]) { 19871da177e4SLinus Torvalds private->uses_cdl = 0; 19881da177e4SLinus Torvalds break; 19891da177e4SLinus Torvalds } 19901da177e4SLinus Torvalds } 19911da177e4SLinus Torvalds if (i == 3) 19921da177e4SLinus Torvalds count_area = &private->count_area[4]; 19931da177e4SLinus Torvalds 19941da177e4SLinus Torvalds if (private->uses_cdl == 0) { 19951da177e4SLinus Torvalds for (i = 0; i < 5; i++) { 19961da177e4SLinus Torvalds if ((private->count_area[i].kl != 0) || 19971da177e4SLinus Torvalds (private->count_area[i].dl != 19983bc9fef9SStefan Haberland private->count_area[0].dl) || 19993bc9fef9SStefan Haberland private->count_area[i].cyl != 0 || 20003bc9fef9SStefan Haberland private->count_area[i].head != count_area_head[i] || 20013bc9fef9SStefan Haberland private->count_area[i].record != count_area_rec[i]) 20021da177e4SLinus Torvalds break; 20031da177e4SLinus Torvalds } 20041da177e4SLinus Torvalds if (i == 5) 20051da177e4SLinus Torvalds count_area = &private->count_area[0]; 20061da177e4SLinus Torvalds } else { 20071da177e4SLinus Torvalds if (private->count_area[3].record == 1) 2008fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 2009fc19f381SStefan Haberland "Track 0 has no records following the VTOC\n"); 20101da177e4SLinus Torvalds } 2011e4dbb0f2SStefan Haberland 20121da177e4SLinus Torvalds if (count_area != NULL && count_area->kl == 0) { 20131da177e4SLinus Torvalds /* we found notthing violating our disk layout */ 20141da177e4SLinus Torvalds if (dasd_check_blocksize(count_area->dl) == 0) 20158e09f215SStefan Weinhuber block->bp_block = count_area->dl; 20161da177e4SLinus Torvalds } 20178e09f215SStefan Weinhuber if (block->bp_block == 0) { 2018fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 2019fc19f381SStefan Haberland "The disk layout of the DASD is not supported\n"); 20201da177e4SLinus Torvalds return -EMEDIUMTYPE; 20211da177e4SLinus Torvalds } 20228e09f215SStefan Weinhuber block->s2b_shift = 0; /* bits to shift 512 to get a block */ 20238e09f215SStefan Weinhuber for (sb = 512; sb < block->bp_block; sb = sb << 1) 20248e09f215SStefan Weinhuber block->s2b_shift++; 20251da177e4SLinus Torvalds 20268e09f215SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 2027e4dbb0f2SStefan Haberland 2028e4dbb0f2SStefan Haberland raw: 2029b44b0ab3SStefan Weinhuber block->blocks = (private->real_cyl * 20301da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 20311da177e4SLinus Torvalds blk_per_trk); 20321da177e4SLinus Torvalds 2033fc19f381SStefan Haberland dev_info(&device->cdev->dev, 2034fc19f381SStefan Haberland "DASD with %d KB/block, %d KB total size, %d KB/track, " 2035fc19f381SStefan Haberland "%s\n", (block->bp_block >> 10), 2036b44b0ab3SStefan Weinhuber ((private->real_cyl * 20371da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 20388e09f215SStefan Weinhuber blk_per_trk * (block->bp_block >> 9)) >> 1), 20398e09f215SStefan Weinhuber ((blk_per_trk * block->bp_block) >> 10), 20401da177e4SLinus Torvalds private->uses_cdl ? 20411da177e4SLinus Torvalds "compatible disk layout" : "linux disk layout"); 20421da177e4SLinus Torvalds 20431da177e4SLinus Torvalds return 0; 20441da177e4SLinus Torvalds } 20451da177e4SLinus Torvalds 20468e09f215SStefan Weinhuber static int dasd_eckd_do_analysis(struct dasd_block *block) 20471da177e4SLinus Torvalds { 20481da177e4SLinus Torvalds struct dasd_eckd_private *private; 20491da177e4SLinus Torvalds 20508e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 20511da177e4SLinus Torvalds if (private->init_cqr_status < 0) 20528e09f215SStefan Weinhuber return dasd_eckd_start_analysis(block); 20531da177e4SLinus Torvalds else 20548e09f215SStefan Weinhuber return dasd_eckd_end_analysis(block); 20551da177e4SLinus Torvalds } 20561da177e4SLinus Torvalds 2057d42e1712SStefan Haberland static int dasd_eckd_basic_to_ready(struct dasd_device *device) 20588e09f215SStefan Weinhuber { 20598e09f215SStefan Weinhuber return dasd_alias_add_device(device); 20608e09f215SStefan Weinhuber }; 20618e09f215SStefan Weinhuber 20628e09f215SStefan Weinhuber static int dasd_eckd_online_to_ready(struct dasd_device *device) 20638e09f215SStefan Weinhuber { 2064501183f2SStefan Haberland cancel_work_sync(&device->reload_device); 206525e2cf1cSStefan Haberland cancel_work_sync(&device->kick_validate); 2066d42e1712SStefan Haberland return 0; 2067d42e1712SStefan Haberland }; 2068d42e1712SStefan Haberland 2069daa991bfSStefan Haberland static int dasd_eckd_basic_to_known(struct dasd_device *device) 2070d42e1712SStefan Haberland { 20718e09f215SStefan Weinhuber return dasd_alias_remove_device(device); 20728e09f215SStefan Weinhuber }; 20738e09f215SStefan Weinhuber 20741da177e4SLinus Torvalds static int 20758e09f215SStefan Weinhuber dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 20761da177e4SLinus Torvalds { 20771da177e4SLinus Torvalds struct dasd_eckd_private *private; 20781da177e4SLinus Torvalds 20798e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 20808e09f215SStefan Weinhuber if (dasd_check_blocksize(block->bp_block) == 0) { 20811da177e4SLinus Torvalds geo->sectors = recs_per_track(&private->rdc_data, 20828e09f215SStefan Weinhuber 0, block->bp_block); 20831da177e4SLinus Torvalds } 20841da177e4SLinus Torvalds geo->cylinders = private->rdc_data.no_cyl; 20851da177e4SLinus Torvalds geo->heads = private->rdc_data.trk_per_cyl; 20861da177e4SLinus Torvalds return 0; 20871da177e4SLinus Torvalds } 20881da177e4SLinus Torvalds 20891da177e4SLinus Torvalds static struct dasd_ccw_req * 2090d42e1712SStefan Haberland dasd_eckd_build_format(struct dasd_device *base, 209129b8dd9dSStefan Haberland struct format_data_t *fdata, 2092a94fa154SStefan Haberland int enable_pav) 20931da177e4SLinus Torvalds { 2094d42e1712SStefan Haberland struct dasd_eckd_private *base_priv; 2095d42e1712SStefan Haberland struct dasd_eckd_private *start_priv; 209629b8dd9dSStefan Haberland struct dasd_device *startdev = NULL; 20971da177e4SLinus Torvalds struct dasd_ccw_req *fcp; 20981da177e4SLinus Torvalds struct eckd_count *ect; 2099d42e1712SStefan Haberland struct ch_t address; 21001da177e4SLinus Torvalds struct ccw1 *ccw; 21011da177e4SLinus Torvalds void *data; 2102b44b0ab3SStefan Weinhuber int rpt; 21031da177e4SLinus Torvalds int cplength, datasize; 2104d42e1712SStefan Haberland int i, j; 2105f9a28f7bSJean-Baptiste Joret int intensity = 0; 2106f9a28f7bSJean-Baptiste Joret int r0_perm; 2107d42e1712SStefan Haberland int nr_tracks; 210818d6624eSStefan Haberland int use_prefix; 21091da177e4SLinus Torvalds 2110a94fa154SStefan Haberland if (enable_pav) 2111d42e1712SStefan Haberland startdev = dasd_alias_get_start_dev(base); 211229b8dd9dSStefan Haberland 2113d42e1712SStefan Haberland if (!startdev) 2114d42e1712SStefan Haberland startdev = base; 21151da177e4SLinus Torvalds 2116d42e1712SStefan Haberland start_priv = (struct dasd_eckd_private *) startdev->private; 2117d42e1712SStefan Haberland base_priv = (struct dasd_eckd_private *) base->private; 2118d42e1712SStefan Haberland 2119d42e1712SStefan Haberland rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize); 2120d42e1712SStefan Haberland 2121d42e1712SStefan Haberland nr_tracks = fdata->stop_unit - fdata->start_unit + 1; 21221da177e4SLinus Torvalds 21231da177e4SLinus Torvalds /* 21241da177e4SLinus Torvalds * fdata->intensity is a bit string that tells us what to do: 21251da177e4SLinus Torvalds * Bit 0: write record zero 21261da177e4SLinus Torvalds * Bit 1: write home address, currently not supported 21271da177e4SLinus Torvalds * Bit 2: invalidate tracks 21281da177e4SLinus Torvalds * Bit 3: use OS/390 compatible disk layout (cdl) 2129f9a28f7bSJean-Baptiste Joret * Bit 4: do not allow storage subsystem to modify record zero 21301da177e4SLinus Torvalds * Only some bit combinations do make sense. 21311da177e4SLinus Torvalds */ 2132f9a28f7bSJean-Baptiste Joret if (fdata->intensity & 0x10) { 2133f9a28f7bSJean-Baptiste Joret r0_perm = 0; 2134f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity & ~0x10; 2135f9a28f7bSJean-Baptiste Joret } else { 2136f9a28f7bSJean-Baptiste Joret r0_perm = 1; 2137f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity; 2138f9a28f7bSJean-Baptiste Joret } 2139d42e1712SStefan Haberland 214018d6624eSStefan Haberland use_prefix = base_priv->features.feature[8] & 0x01; 214118d6624eSStefan Haberland 2142f9a28f7bSJean-Baptiste Joret switch (intensity) { 21431da177e4SLinus Torvalds case 0x00: /* Normal format */ 21441da177e4SLinus Torvalds case 0x08: /* Normal format, use cdl. */ 2145d42e1712SStefan Haberland cplength = 2 + (rpt*nr_tracks); 214618d6624eSStefan Haberland if (use_prefix) 2147d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 21481da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 2149d42e1712SStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 215018d6624eSStefan Haberland else 215118d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 215218d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 215318d6624eSStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 21541da177e4SLinus Torvalds break; 21551da177e4SLinus Torvalds case 0x01: /* Write record zero and format track. */ 21561da177e4SLinus Torvalds case 0x09: /* Write record zero and format track, use cdl. */ 2157d42e1712SStefan Haberland cplength = 2 + rpt * nr_tracks; 215818d6624eSStefan Haberland if (use_prefix) 2159d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 21601da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 21611da177e4SLinus Torvalds sizeof(struct eckd_count) + 2162d42e1712SStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 216318d6624eSStefan Haberland else 216418d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 216518d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 216618d6624eSStefan Haberland sizeof(struct eckd_count) + 216718d6624eSStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 21681da177e4SLinus Torvalds break; 21691da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 21701da177e4SLinus Torvalds case 0x0c: /* Invalidate track, use cdl. */ 21711da177e4SLinus Torvalds cplength = 3; 217218d6624eSStefan Haberland if (use_prefix) 2173d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 21741da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 21751da177e4SLinus Torvalds sizeof(struct eckd_count); 217618d6624eSStefan Haberland else 217718d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 217818d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 217918d6624eSStefan Haberland sizeof(struct eckd_count); 21801da177e4SLinus Torvalds break; 21811da177e4SLinus Torvalds default: 2182d42e1712SStefan Haberland dev_warn(&startdev->cdev->dev, 2183d42e1712SStefan Haberland "An I/O control call used incorrect flags 0x%x\n", 2184d42e1712SStefan Haberland fdata->intensity); 21851da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 21861da177e4SLinus Torvalds } 21871da177e4SLinus Torvalds /* Allocate the format ccw request. */ 2188d42e1712SStefan Haberland fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 2189d42e1712SStefan Haberland datasize, startdev); 21901da177e4SLinus Torvalds if (IS_ERR(fcp)) 21911da177e4SLinus Torvalds return fcp; 21921da177e4SLinus Torvalds 2193d42e1712SStefan Haberland start_priv->count++; 21941da177e4SLinus Torvalds data = fcp->data; 21951da177e4SLinus Torvalds ccw = fcp->cpaddr; 21961da177e4SLinus Torvalds 2197f9a28f7bSJean-Baptiste Joret switch (intensity & ~0x08) { 21981da177e4SLinus Torvalds case 0x00: /* Normal format. */ 219918d6624eSStefan Haberland if (use_prefix) { 2200d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2201d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 2202d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2203f9a28f7bSJean-Baptiste Joret /* grant subsystem permission to format R0 */ 2204f9a28f7bSJean-Baptiste Joret if (r0_perm) 2205d42e1712SStefan Haberland ((struct PFX_eckd_data *)data) 2206d42e1712SStefan Haberland ->define_extent.ga_extended |= 0x04; 2207d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 220818d6624eSStefan Haberland } else { 220918d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 221018d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 221118d6624eSStefan Haberland DASD_ECKD_CCW_WRITE_CKD, startdev); 221218d6624eSStefan Haberland /* grant subsystem permission to format R0 */ 221318d6624eSStefan Haberland if (r0_perm) 221418d6624eSStefan Haberland ((struct DE_eckd_data *) data) 221518d6624eSStefan Haberland ->ga_extended |= 0x04; 221618d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 221718d6624eSStefan Haberland } 22181da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 22191da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 2220d42e1712SStefan Haberland fdata->start_unit, 0, rpt*nr_tracks, 2221d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, 22221da177e4SLinus Torvalds fdata->blksize); 22231da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 22241da177e4SLinus Torvalds break; 22251da177e4SLinus Torvalds case 0x01: /* Write record zero + format track. */ 222618d6624eSStefan Haberland if (use_prefix) { 2227d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2228d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 22291da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, 2230d42e1712SStefan Haberland base, startdev); 2231d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 223218d6624eSStefan Haberland } else { 223318d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 223418d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 223518d6624eSStefan Haberland DASD_ECKD_CCW_WRITE_RECORD_ZERO, startdev); 223618d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 223718d6624eSStefan Haberland } 22381da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 22391da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 2240d42e1712SStefan Haberland fdata->start_unit, 0, rpt * nr_tracks + 1, 2241d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_RECORD_ZERO, base, 2242d42e1712SStefan Haberland base->block->bp_block); 22431da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 22441da177e4SLinus Torvalds break; 22451da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 224618d6624eSStefan Haberland if (use_prefix) { 2247d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2248d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 2249d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2250d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 225118d6624eSStefan Haberland } else { 225218d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 225318d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 225418d6624eSStefan Haberland DASD_ECKD_CCW_WRITE_CKD, startdev); 225518d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 225618d6624eSStefan Haberland } 22571da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 22581da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 22591da177e4SLinus Torvalds fdata->start_unit, 0, 1, 2260d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, 8); 22611da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 22621da177e4SLinus Torvalds break; 22631da177e4SLinus Torvalds } 2264d42e1712SStefan Haberland 2265d42e1712SStefan Haberland for (j = 0; j < nr_tracks; j++) { 2266d42e1712SStefan Haberland /* calculate cylinder and head for the current track */ 2267d42e1712SStefan Haberland set_ch_t(&address, 2268d42e1712SStefan Haberland (fdata->start_unit + j) / 2269d42e1712SStefan Haberland base_priv->rdc_data.trk_per_cyl, 2270d42e1712SStefan Haberland (fdata->start_unit + j) % 2271d42e1712SStefan Haberland base_priv->rdc_data.trk_per_cyl); 2272f9a28f7bSJean-Baptiste Joret if (intensity & 0x01) { /* write record zero */ 22731da177e4SLinus Torvalds ect = (struct eckd_count *) data; 22741da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2275b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2276b44b0ab3SStefan Weinhuber ect->head = address.head; 22771da177e4SLinus Torvalds ect->record = 0; 22781da177e4SLinus Torvalds ect->kl = 0; 22791da177e4SLinus Torvalds ect->dl = 8; 22801da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 22811da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 22821da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 22831da177e4SLinus Torvalds ccw->count = 8; 22841da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 22851da177e4SLinus Torvalds ccw++; 22861da177e4SLinus Torvalds } 2287f9a28f7bSJean-Baptiste Joret if ((intensity & ~0x08) & 0x04) { /* erase track */ 22881da177e4SLinus Torvalds ect = (struct eckd_count *) data; 22891da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2290b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2291b44b0ab3SStefan Weinhuber ect->head = address.head; 22921da177e4SLinus Torvalds ect->record = 1; 22931da177e4SLinus Torvalds ect->kl = 0; 22941da177e4SLinus Torvalds ect->dl = 0; 22951da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 22961da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 22971da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 22981da177e4SLinus Torvalds ccw->count = 8; 22991da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 23001da177e4SLinus Torvalds } else { /* write remaining records */ 23011da177e4SLinus Torvalds for (i = 0; i < rpt; i++) { 23021da177e4SLinus Torvalds ect = (struct eckd_count *) data; 23031da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2304b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2305b44b0ab3SStefan Weinhuber ect->head = address.head; 23061da177e4SLinus Torvalds ect->record = i + 1; 23071da177e4SLinus Torvalds ect->kl = 0; 23081da177e4SLinus Torvalds ect->dl = fdata->blksize; 2309d42e1712SStefan Haberland /* 2310d42e1712SStefan Haberland * Check for special tracks 0-1 2311d42e1712SStefan Haberland * when formatting CDL 2312d42e1712SStefan Haberland */ 2313f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 23141da177e4SLinus Torvalds fdata->start_unit == 0) { 23151da177e4SLinus Torvalds if (i < 3) { 23161da177e4SLinus Torvalds ect->kl = 4; 23171da177e4SLinus Torvalds ect->dl = sizes_trk0[i] - 4; 23181da177e4SLinus Torvalds } 23191da177e4SLinus Torvalds } 2320f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 23211da177e4SLinus Torvalds fdata->start_unit == 1) { 23221da177e4SLinus Torvalds ect->kl = 44; 23231da177e4SLinus Torvalds ect->dl = LABEL_SIZE - 44; 23241da177e4SLinus Torvalds } 23251da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 2326d42e1712SStefan Haberland if (i != 0 || j == 0) 2327d42e1712SStefan Haberland ccw->cmd_code = 2328d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD; 2329d42e1712SStefan Haberland else 2330d42e1712SStefan Haberland ccw->cmd_code = 2331d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD_MT; 23321da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 23331da177e4SLinus Torvalds ccw->count = 8; 23341da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 23351da177e4SLinus Torvalds ccw++; 23361da177e4SLinus Torvalds } 23371da177e4SLinus Torvalds } 2338d42e1712SStefan Haberland } 2339d42e1712SStefan Haberland 2340d42e1712SStefan Haberland fcp->startdev = startdev; 2341d42e1712SStefan Haberland fcp->memdev = startdev; 234229b8dd9dSStefan Haberland fcp->basedev = base; 2343eb6e199bSStefan Weinhuber fcp->retries = 256; 2344d42e1712SStefan Haberland fcp->expires = startdev->default_expires * HZ; 23451aae0560SHeiko Carstens fcp->buildclk = get_tod_clock(); 23461da177e4SLinus Torvalds fcp->status = DASD_CQR_FILLED; 2347d42e1712SStefan Haberland 23481da177e4SLinus Torvalds return fcp; 23491da177e4SLinus Torvalds } 23501da177e4SLinus Torvalds 2351d42e1712SStefan Haberland static int 2352d42e1712SStefan Haberland dasd_eckd_format_device(struct dasd_device *base, 235329b8dd9dSStefan Haberland struct format_data_t *fdata, 2354a94fa154SStefan Haberland int enable_pav) 2355d42e1712SStefan Haberland { 2356d42e1712SStefan Haberland struct dasd_ccw_req *cqr, *n; 2357d42e1712SStefan Haberland struct dasd_block *block; 2358d42e1712SStefan Haberland struct dasd_eckd_private *private; 2359d42e1712SStefan Haberland struct list_head format_queue; 2360d42e1712SStefan Haberland struct dasd_device *device; 2361d42e1712SStefan Haberland int old_stop, format_step; 236229b8dd9dSStefan Haberland int step, rc = 0, sleep_rc; 2363d42e1712SStefan Haberland 2364d42e1712SStefan Haberland block = base->block; 2365d42e1712SStefan Haberland private = (struct dasd_eckd_private *) base->private; 2366d42e1712SStefan Haberland 2367d42e1712SStefan Haberland /* Sanity checks. */ 2368d42e1712SStefan Haberland if (fdata->start_unit >= 2369d42e1712SStefan Haberland (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2370d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2371d42e1712SStefan Haberland "Start track number %u used in formatting is too big\n", 2372d42e1712SStefan Haberland fdata->start_unit); 2373d42e1712SStefan Haberland return -EINVAL; 2374d42e1712SStefan Haberland } 2375d42e1712SStefan Haberland if (fdata->stop_unit >= 2376d42e1712SStefan Haberland (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2377d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2378d42e1712SStefan Haberland "Stop track number %u used in formatting is too big\n", 2379d42e1712SStefan Haberland fdata->stop_unit); 2380d42e1712SStefan Haberland return -EINVAL; 2381d42e1712SStefan Haberland } 2382d42e1712SStefan Haberland if (fdata->start_unit > fdata->stop_unit) { 2383d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2384d42e1712SStefan Haberland "Start track %u used in formatting exceeds end track\n", 2385d42e1712SStefan Haberland fdata->start_unit); 2386d42e1712SStefan Haberland return -EINVAL; 2387d42e1712SStefan Haberland } 2388d42e1712SStefan Haberland if (dasd_check_blocksize(fdata->blksize) != 0) { 2389d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2390d42e1712SStefan Haberland "The DASD cannot be formatted with block size %u\n", 2391d42e1712SStefan Haberland fdata->blksize); 2392d42e1712SStefan Haberland return -EINVAL; 2393d42e1712SStefan Haberland } 2394d42e1712SStefan Haberland 2395d42e1712SStefan Haberland INIT_LIST_HEAD(&format_queue); 2396d42e1712SStefan Haberland 239729b8dd9dSStefan Haberland old_stop = fdata->stop_unit; 2398d42e1712SStefan Haberland while (fdata->start_unit <= 1) { 2399d42e1712SStefan Haberland fdata->stop_unit = fdata->start_unit; 2400a94fa154SStefan Haberland cqr = dasd_eckd_build_format(base, fdata, enable_pav); 2401d42e1712SStefan Haberland list_add(&cqr->blocklist, &format_queue); 2402d42e1712SStefan Haberland 2403d42e1712SStefan Haberland fdata->stop_unit = old_stop; 2404d42e1712SStefan Haberland fdata->start_unit++; 2405d42e1712SStefan Haberland 2406d42e1712SStefan Haberland if (fdata->start_unit > fdata->stop_unit) 2407d42e1712SStefan Haberland goto sleep; 2408d42e1712SStefan Haberland } 2409d42e1712SStefan Haberland 2410d42e1712SStefan Haberland retry: 2411d42e1712SStefan Haberland format_step = 255 / recs_per_track(&private->rdc_data, 0, 2412d42e1712SStefan Haberland fdata->blksize); 2413d42e1712SStefan Haberland while (fdata->start_unit <= old_stop) { 2414d42e1712SStefan Haberland step = fdata->stop_unit - fdata->start_unit + 1; 2415d42e1712SStefan Haberland if (step > format_step) 2416d42e1712SStefan Haberland fdata->stop_unit = fdata->start_unit + format_step - 1; 2417d42e1712SStefan Haberland 2418a94fa154SStefan Haberland cqr = dasd_eckd_build_format(base, fdata, enable_pav); 2419d42e1712SStefan Haberland if (IS_ERR(cqr)) { 2420d42e1712SStefan Haberland if (PTR_ERR(cqr) == -ENOMEM) { 2421d42e1712SStefan Haberland /* 2422d42e1712SStefan Haberland * not enough memory available 2423d42e1712SStefan Haberland * go to out and start requests 2424d42e1712SStefan Haberland * retry after first requests were finished 2425d42e1712SStefan Haberland */ 2426d42e1712SStefan Haberland fdata->stop_unit = old_stop; 2427d42e1712SStefan Haberland goto sleep; 2428d42e1712SStefan Haberland } else 2429d42e1712SStefan Haberland return PTR_ERR(cqr); 2430d42e1712SStefan Haberland } 2431d42e1712SStefan Haberland list_add(&cqr->blocklist, &format_queue); 2432d42e1712SStefan Haberland 2433d42e1712SStefan Haberland fdata->start_unit = fdata->stop_unit + 1; 2434d42e1712SStefan Haberland fdata->stop_unit = old_stop; 2435d42e1712SStefan Haberland } 2436d42e1712SStefan Haberland 2437d42e1712SStefan Haberland sleep: 243829b8dd9dSStefan Haberland sleep_rc = dasd_sleep_on_queue(&format_queue); 2439d42e1712SStefan Haberland 2440d42e1712SStefan Haberland list_for_each_entry_safe(cqr, n, &format_queue, blocklist) { 2441d42e1712SStefan Haberland device = cqr->startdev; 2442d42e1712SStefan Haberland private = (struct dasd_eckd_private *) device->private; 2443d42e1712SStefan Haberland if (cqr->status == DASD_CQR_FAILED) 2444d42e1712SStefan Haberland rc = -EIO; 2445d42e1712SStefan Haberland list_del_init(&cqr->blocklist); 2446d42e1712SStefan Haberland dasd_sfree_request(cqr, device); 2447d42e1712SStefan Haberland private->count--; 2448d42e1712SStefan Haberland } 2449d42e1712SStefan Haberland 245029b8dd9dSStefan Haberland if (sleep_rc) 245129b8dd9dSStefan Haberland return sleep_rc; 245229b8dd9dSStefan Haberland 2453d42e1712SStefan Haberland /* 2454d42e1712SStefan Haberland * in case of ENOMEM we need to retry after 2455d42e1712SStefan Haberland * first requests are finished 2456d42e1712SStefan Haberland */ 2457d42e1712SStefan Haberland if (fdata->start_unit <= fdata->stop_unit) 2458d42e1712SStefan Haberland goto retry; 2459d42e1712SStefan Haberland 2460d42e1712SStefan Haberland return rc; 2461d42e1712SStefan Haberland } 2462d42e1712SStefan Haberland 24638e09f215SStefan Weinhuber static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 24641da177e4SLinus Torvalds { 2465a2ace466SHannes Reinecke if (cqr->retries < 0) { 2466a2ace466SHannes Reinecke cqr->status = DASD_CQR_FAILED; 2467a2ace466SHannes Reinecke return; 2468a2ace466SHannes Reinecke } 24698e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 24708e09f215SStefan Weinhuber if (cqr->block && (cqr->startdev != cqr->block->base)) { 24718e09f215SStefan Weinhuber dasd_eckd_reset_ccw_to_base_io(cqr); 24728e09f215SStefan Weinhuber cqr->startdev = cqr->block->base; 2473a4d26c6aSStefan Weinhuber cqr->lpm = cqr->block->base->path_data.opm; 24741da177e4SLinus Torvalds } 24758e09f215SStefan Weinhuber }; 24761da177e4SLinus Torvalds 24771da177e4SLinus Torvalds static dasd_erp_fn_t 24781da177e4SLinus Torvalds dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 24791da177e4SLinus Torvalds { 24808e09f215SStefan Weinhuber struct dasd_device *device = (struct dasd_device *) cqr->startdev; 24811da177e4SLinus Torvalds struct ccw_device *cdev = device->cdev; 24821da177e4SLinus Torvalds 24831da177e4SLinus Torvalds switch (cdev->id.cu_type) { 24841da177e4SLinus Torvalds case 0x3990: 24851da177e4SLinus Torvalds case 0x2105: 24861da177e4SLinus Torvalds case 0x2107: 24871da177e4SLinus Torvalds case 0x1750: 24881da177e4SLinus Torvalds return dasd_3990_erp_action; 24891da177e4SLinus Torvalds case 0x9343: 24901da177e4SLinus Torvalds case 0x3880: 24911da177e4SLinus Torvalds default: 24921da177e4SLinus Torvalds return dasd_default_erp_action; 24931da177e4SLinus Torvalds } 24941da177e4SLinus Torvalds } 24951da177e4SLinus Torvalds 24961da177e4SLinus Torvalds static dasd_erp_fn_t 24971da177e4SLinus Torvalds dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 24981da177e4SLinus Torvalds { 24991da177e4SLinus Torvalds return dasd_default_erp_postaction; 25001da177e4SLinus Torvalds } 25011da177e4SLinus Torvalds 25025a27e60dSStefan Weinhuber static void dasd_eckd_check_for_device_change(struct dasd_device *device, 25035a27e60dSStefan Weinhuber struct dasd_ccw_req *cqr, 25048e09f215SStefan Weinhuber struct irb *irb) 25058e09f215SStefan Weinhuber { 25068e09f215SStefan Weinhuber char mask; 2507f3eb5384SStefan Weinhuber char *sense = NULL; 2508501183f2SStefan Haberland struct dasd_eckd_private *private; 25098e09f215SStefan Weinhuber 2510501183f2SStefan Haberland private = (struct dasd_eckd_private *) device->private; 25118e09f215SStefan Weinhuber /* first of all check for state change pending interrupt */ 25128e09f215SStefan Weinhuber mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 2513f3eb5384SStefan Weinhuber if ((scsw_dstat(&irb->scsw) & mask) == mask) { 2514c8d1c0ffSStefan Haberland /* 2515c8d1c0ffSStefan Haberland * for alias only, not in offline processing 2516c8d1c0ffSStefan Haberland * and only if not suspended 2517c8d1c0ffSStefan Haberland */ 2518501183f2SStefan Haberland if (!device->block && private->lcu && 251925e2cf1cSStefan Haberland device->state == DASD_STATE_ONLINE && 2520c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_OFFLINE, &device->flags) && 2521c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 2522501183f2SStefan Haberland /* 2523501183f2SStefan Haberland * the state change could be caused by an alias 2524501183f2SStefan Haberland * reassignment remove device from alias handling 2525501183f2SStefan Haberland * to prevent new requests from being scheduled on 2526501183f2SStefan Haberland * the wrong alias device 2527501183f2SStefan Haberland */ 2528501183f2SStefan Haberland dasd_alias_remove_device(device); 2529501183f2SStefan Haberland 2530501183f2SStefan Haberland /* schedule worker to reload device */ 2531501183f2SStefan Haberland dasd_reload_device(device); 2532501183f2SStefan Haberland } 25338e09f215SStefan Weinhuber dasd_generic_handle_state_change(device); 25348e09f215SStefan Weinhuber return; 25358e09f215SStefan Weinhuber } 25368e09f215SStefan Weinhuber 2537a5a0061fSStefan Weinhuber sense = dasd_get_sense(irb); 25385a27e60dSStefan Weinhuber if (!sense) 25395a27e60dSStefan Weinhuber return; 25405a27e60dSStefan Weinhuber 25415a27e60dSStefan Weinhuber /* summary unit check */ 2542c7a29e56SStefan Weinhuber if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) && 2543a5a0061fSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { 25448e09f215SStefan Weinhuber dasd_alias_handle_summary_unit_check(device, irb); 25458e09f215SStefan Weinhuber return; 25468e09f215SStefan Weinhuber } 25478e09f215SStefan Weinhuber 2548f60c768cSStefan Haberland /* service information message SIM */ 25495a27e60dSStefan Weinhuber if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && 2550f3eb5384SStefan Weinhuber ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 2551f3eb5384SStefan Weinhuber dasd_3990_erp_handle_sim(device, sense); 2552f60c768cSStefan Haberland return; 2553f60c768cSStefan Haberland } 2554f60c768cSStefan Haberland 25555a27e60dSStefan Weinhuber /* loss of device reservation is handled via base devices only 25565a27e60dSStefan Weinhuber * as alias devices may be used with several bases 25575a27e60dSStefan Weinhuber */ 2558c7a29e56SStefan Weinhuber if (device->block && (sense[27] & DASD_SENSE_BIT_0) && 2559c7a29e56SStefan Weinhuber (sense[7] == 0x3F) && 25605a27e60dSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && 25615a27e60dSStefan Weinhuber test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { 25625a27e60dSStefan Weinhuber if (device->features & DASD_FEATURE_FAILONSLCK) 25635a27e60dSStefan Weinhuber set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); 25645a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 25655a27e60dSStefan Weinhuber dev_err(&device->cdev->dev, 25665a27e60dSStefan Weinhuber "The device reservation was lost\n"); 2567ada3df91SStefan Haberland } 25685a27e60dSStefan Weinhuber } 2569f3eb5384SStefan Weinhuber 2570f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( 2571f3eb5384SStefan Weinhuber struct dasd_device *startdev, 25728e09f215SStefan Weinhuber struct dasd_block *block, 2573f3eb5384SStefan Weinhuber struct request *req, 2574f3eb5384SStefan Weinhuber sector_t first_rec, 2575f3eb5384SStefan Weinhuber sector_t last_rec, 2576f3eb5384SStefan Weinhuber sector_t first_trk, 2577f3eb5384SStefan Weinhuber sector_t last_trk, 2578f3eb5384SStefan Weinhuber unsigned int first_offs, 2579f3eb5384SStefan Weinhuber unsigned int last_offs, 2580f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 2581f3eb5384SStefan Weinhuber unsigned int blksize) 25821da177e4SLinus Torvalds { 25831da177e4SLinus Torvalds struct dasd_eckd_private *private; 25841da177e4SLinus Torvalds unsigned long *idaws; 25851da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 25861da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 25871da177e4SLinus Torvalds struct ccw1 *ccw; 25885705f702SNeilBrown struct req_iterator iter; 25897988613bSKent Overstreet struct bio_vec bv; 25901da177e4SLinus Torvalds char *dst; 2591f3eb5384SStefan Weinhuber unsigned int off; 25921da177e4SLinus Torvalds int count, cidaw, cplength, datasize; 2593f3eb5384SStefan Weinhuber sector_t recid; 25941da177e4SLinus Torvalds unsigned char cmd, rcmd; 25958e09f215SStefan Weinhuber int use_prefix; 25968e09f215SStefan Weinhuber struct dasd_device *basedev; 25971da177e4SLinus Torvalds 25988e09f215SStefan Weinhuber basedev = block->base; 25998e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 26001da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 26011da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_READ_MT; 26021da177e4SLinus Torvalds else if (rq_data_dir(req) == WRITE) 26031da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_WRITE_MT; 26041da177e4SLinus Torvalds else 26051da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 2606f3eb5384SStefan Weinhuber 26071da177e4SLinus Torvalds /* Check struct bio and count the number of blocks for the request. */ 26081da177e4SLinus Torvalds count = 0; 26091da177e4SLinus Torvalds cidaw = 0; 26105705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 26117988613bSKent Overstreet if (bv.bv_len & (blksize - 1)) 26121da177e4SLinus Torvalds /* Eckd can only do full blocks. */ 26131da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 26147988613bSKent Overstreet count += bv.bv_len >> (block->s2b_shift + 9); 26157988613bSKent Overstreet if (idal_is_needed (page_address(bv.bv_page), bv.bv_len)) 26167988613bSKent Overstreet cidaw += bv.bv_len >> (block->s2b_shift + 9); 26171da177e4SLinus Torvalds } 26181da177e4SLinus Torvalds /* Paranoia. */ 26191da177e4SLinus Torvalds if (count != last_rec - first_rec + 1) 26201da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 26218e09f215SStefan Weinhuber 26228e09f215SStefan Weinhuber /* use the prefix command if available */ 26238e09f215SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 26248e09f215SStefan Weinhuber if (use_prefix) { 26258e09f215SStefan Weinhuber /* 1x prefix + number of blocks */ 26268e09f215SStefan Weinhuber cplength = 2 + count; 26278e09f215SStefan Weinhuber /* 1x prefix + cidaws*sizeof(long) */ 26288e09f215SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 26298e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 26308e09f215SStefan Weinhuber cidaw * sizeof(unsigned long); 26318e09f215SStefan Weinhuber } else { 26321da177e4SLinus Torvalds /* 1x define extent + 1x locate record + number of blocks */ 26331da177e4SLinus Torvalds cplength = 2 + count; 26341da177e4SLinus Torvalds /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 26358e09f215SStefan Weinhuber datasize = sizeof(struct DE_eckd_data) + 26368e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 26371da177e4SLinus Torvalds cidaw * sizeof(unsigned long); 26388e09f215SStefan Weinhuber } 26391da177e4SLinus Torvalds /* Find out the number of additional locate record ccws for cdl. */ 26401da177e4SLinus Torvalds if (private->uses_cdl && first_rec < 2*blk_per_trk) { 26411da177e4SLinus Torvalds if (last_rec >= 2*blk_per_trk) 26421da177e4SLinus Torvalds count = 2*blk_per_trk - first_rec; 26431da177e4SLinus Torvalds cplength += count; 26441da177e4SLinus Torvalds datasize += count*sizeof(struct LO_eckd_data); 26451da177e4SLinus Torvalds } 26461da177e4SLinus Torvalds /* Allocate the ccw request. */ 264768b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 264868b781feSStefan Haberland startdev); 26491da177e4SLinus Torvalds if (IS_ERR(cqr)) 26501da177e4SLinus Torvalds return cqr; 26511da177e4SLinus Torvalds ccw = cqr->cpaddr; 26528e09f215SStefan Weinhuber /* First ccw is define extent or prefix. */ 26538e09f215SStefan Weinhuber if (use_prefix) { 26548e09f215SStefan Weinhuber if (prefix(ccw++, cqr->data, first_trk, 26558e09f215SStefan Weinhuber last_trk, cmd, basedev, startdev) == -EAGAIN) { 26568e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 26578e09f215SStefan Weinhuber * Try again later. 26588e09f215SStefan Weinhuber */ 26598e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2660d54853efSMartin Schwidefsky return ERR_PTR(-EAGAIN); 2661d54853efSMartin Schwidefsky } 26628e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 26638e09f215SStefan Weinhuber sizeof(struct PFX_eckd_data)); 26648e09f215SStefan Weinhuber } else { 26658e09f215SStefan Weinhuber if (define_extent(ccw++, cqr->data, first_trk, 2666b38f27e8SStefan Haberland last_trk, cmd, basedev) == -EAGAIN) { 26678e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 26688e09f215SStefan Weinhuber * Try again later. 26698e09f215SStefan Weinhuber */ 26708e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 26718e09f215SStefan Weinhuber return ERR_PTR(-EAGAIN); 26728e09f215SStefan Weinhuber } 26738e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 26748e09f215SStefan Weinhuber sizeof(struct DE_eckd_data)); 26758e09f215SStefan Weinhuber } 26761da177e4SLinus Torvalds /* Build locate_record+read/write/ccws. */ 26771da177e4SLinus Torvalds LO_data = (struct LO_eckd_data *) (idaws + cidaw); 26781da177e4SLinus Torvalds recid = first_rec; 26791da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 26801da177e4SLinus Torvalds /* Only standard blocks so there is just one locate record. */ 26811da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 26821da177e4SLinus Torvalds locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 26838e09f215SStefan Weinhuber last_rec - recid + 1, cmd, basedev, blksize); 26841da177e4SLinus Torvalds } 26855705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 26867988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 26871da177e4SLinus Torvalds if (dasd_page_cache) { 26881da177e4SLinus Torvalds char *copy = kmem_cache_alloc(dasd_page_cache, 2689441e143eSChristoph Lameter GFP_DMA | __GFP_NOWARN); 26901da177e4SLinus Torvalds if (copy && rq_data_dir(req) == WRITE) 26917988613bSKent Overstreet memcpy(copy + bv.bv_offset, dst, bv.bv_len); 26921da177e4SLinus Torvalds if (copy) 26937988613bSKent Overstreet dst = copy + bv.bv_offset; 26941da177e4SLinus Torvalds } 26957988613bSKent Overstreet for (off = 0; off < bv.bv_len; off += blksize) { 26961da177e4SLinus Torvalds sector_t trkid = recid; 26971da177e4SLinus Torvalds unsigned int recoffs = sector_div(trkid, blk_per_trk); 26981da177e4SLinus Torvalds rcmd = cmd; 26991da177e4SLinus Torvalds count = blksize; 27001da177e4SLinus Torvalds /* Locate record for cdl special block ? */ 27011da177e4SLinus Torvalds if (private->uses_cdl && recid < 2*blk_per_trk) { 27021da177e4SLinus Torvalds if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 27031da177e4SLinus Torvalds rcmd |= 0x8; 27041da177e4SLinus Torvalds count = dasd_eckd_cdl_reclen(recid); 2705ec5883abSHorst Hummel if (count < blksize && 2706ec5883abSHorst Hummel rq_data_dir(req) == READ) 27071da177e4SLinus Torvalds memset(dst + count, 0xe5, 27081da177e4SLinus Torvalds blksize - count); 27091da177e4SLinus Torvalds } 27101da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 27111da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 27121da177e4SLinus Torvalds trkid, recoffs + 1, 27138e09f215SStefan Weinhuber 1, rcmd, basedev, count); 27141da177e4SLinus Torvalds } 27151da177e4SLinus Torvalds /* Locate record for standard blocks ? */ 27161da177e4SLinus Torvalds if (private->uses_cdl && recid == 2*blk_per_trk) { 27171da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 27181da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 27191da177e4SLinus Torvalds trkid, recoffs + 1, 27201da177e4SLinus Torvalds last_rec - recid + 1, 27218e09f215SStefan Weinhuber cmd, basedev, count); 27221da177e4SLinus Torvalds } 27231da177e4SLinus Torvalds /* Read/write ccw. */ 27241da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 27251da177e4SLinus Torvalds ccw->cmd_code = rcmd; 27261da177e4SLinus Torvalds ccw->count = count; 27271da177e4SLinus Torvalds if (idal_is_needed(dst, blksize)) { 27281da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) idaws; 27291da177e4SLinus Torvalds ccw->flags = CCW_FLAG_IDA; 27301da177e4SLinus Torvalds idaws = idal_create_words(idaws, dst, blksize); 27311da177e4SLinus Torvalds } else { 27321da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) dst; 27331da177e4SLinus Torvalds ccw->flags = 0; 27341da177e4SLinus Torvalds } 27351da177e4SLinus Torvalds ccw++; 27361da177e4SLinus Torvalds dst += blksize; 27371da177e4SLinus Torvalds recid++; 27381da177e4SLinus Torvalds } 27391da177e4SLinus Torvalds } 274013de227bSHolger Smolinski if (blk_noretry_request(req) || 274113de227bSHolger Smolinski block->base->features & DASD_FEATURE_FAILFAST) 27421c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 27438e09f215SStefan Weinhuber cqr->startdev = startdev; 27448e09f215SStefan Weinhuber cqr->memdev = startdev; 27458e09f215SStefan Weinhuber cqr->block = block; 27467c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2747a4d26c6aSStefan Weinhuber cqr->lpm = startdev->path_data.ppm; 27481f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 27491aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 27501da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 27511da177e4SLinus Torvalds return cqr; 27521da177e4SLinus Torvalds } 27531da177e4SLinus Torvalds 2754f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 2755f3eb5384SStefan Weinhuber struct dasd_device *startdev, 2756f3eb5384SStefan Weinhuber struct dasd_block *block, 2757f3eb5384SStefan Weinhuber struct request *req, 2758f3eb5384SStefan Weinhuber sector_t first_rec, 2759f3eb5384SStefan Weinhuber sector_t last_rec, 2760f3eb5384SStefan Weinhuber sector_t first_trk, 2761f3eb5384SStefan Weinhuber sector_t last_trk, 2762f3eb5384SStefan Weinhuber unsigned int first_offs, 2763f3eb5384SStefan Weinhuber unsigned int last_offs, 2764f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 2765f3eb5384SStefan Weinhuber unsigned int blksize) 2766f3eb5384SStefan Weinhuber { 2767f3eb5384SStefan Weinhuber unsigned long *idaws; 2768f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 2769f3eb5384SStefan Weinhuber struct ccw1 *ccw; 2770f3eb5384SStefan Weinhuber struct req_iterator iter; 27717988613bSKent Overstreet struct bio_vec bv; 2772f3eb5384SStefan Weinhuber char *dst, *idaw_dst; 2773f3eb5384SStefan Weinhuber unsigned int cidaw, cplength, datasize; 2774f3eb5384SStefan Weinhuber unsigned int tlf; 2775f3eb5384SStefan Weinhuber sector_t recid; 2776f3eb5384SStefan Weinhuber unsigned char cmd; 2777f3eb5384SStefan Weinhuber struct dasd_device *basedev; 2778f3eb5384SStefan Weinhuber unsigned int trkcount, count, count_to_trk_end; 2779f3eb5384SStefan Weinhuber unsigned int idaw_len, seg_len, part_len, len_to_track_end; 2780f3eb5384SStefan Weinhuber unsigned char new_track, end_idaw; 2781f3eb5384SStefan Weinhuber sector_t trkid; 2782f3eb5384SStefan Weinhuber unsigned int recoffs; 2783f3eb5384SStefan Weinhuber 2784f3eb5384SStefan Weinhuber basedev = block->base; 2785f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) 2786f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 2787f3eb5384SStefan Weinhuber else if (rq_data_dir(req) == WRITE) 2788f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 2789f3eb5384SStefan Weinhuber else 2790f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 2791f3eb5384SStefan Weinhuber 2792f3eb5384SStefan Weinhuber /* Track based I/O needs IDAWs for each page, and not just for 2793f3eb5384SStefan Weinhuber * 64 bit addresses. We need additional idals for pages 2794f3eb5384SStefan Weinhuber * that get filled from two tracks, so we use the number 2795f3eb5384SStefan Weinhuber * of records as upper limit. 2796f3eb5384SStefan Weinhuber */ 2797f3eb5384SStefan Weinhuber cidaw = last_rec - first_rec + 1; 2798f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 2799f3eb5384SStefan Weinhuber 2800f3eb5384SStefan Weinhuber /* 1x prefix + one read/write ccw per track */ 2801f3eb5384SStefan Weinhuber cplength = 1 + trkcount; 2802f3eb5384SStefan Weinhuber 2803f3eb5384SStefan Weinhuber /* on 31-bit we need space for two 32 bit addresses per page 2804f3eb5384SStefan Weinhuber * on 64-bit one 64 bit address 2805f3eb5384SStefan Weinhuber */ 2806f3eb5384SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 2807f3eb5384SStefan Weinhuber cidaw * sizeof(unsigned long long); 2808f3eb5384SStefan Weinhuber 2809f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 281068b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 281168b781feSStefan Haberland startdev); 2812f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 2813f3eb5384SStefan Weinhuber return cqr; 2814f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 2815f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 2816f3eb5384SStefan Weinhuber if (first_trk == last_trk) 2817f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 2818f3eb5384SStefan Weinhuber else 2819f3eb5384SStefan Weinhuber tlf = last_offs + 1; 2820f3eb5384SStefan Weinhuber tlf *= blksize; 2821f3eb5384SStefan Weinhuber 2822f3eb5384SStefan Weinhuber if (prefix_LRE(ccw++, cqr->data, first_trk, 2823f3eb5384SStefan Weinhuber last_trk, cmd, basedev, startdev, 2824f3eb5384SStefan Weinhuber 1 /* format */, first_offs + 1, 2825f3eb5384SStefan Weinhuber trkcount, blksize, 2826f3eb5384SStefan Weinhuber tlf) == -EAGAIN) { 2827f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 2828f3eb5384SStefan Weinhuber * Try again later. 2829f3eb5384SStefan Weinhuber */ 2830f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2831f3eb5384SStefan Weinhuber return ERR_PTR(-EAGAIN); 2832f3eb5384SStefan Weinhuber } 2833f3eb5384SStefan Weinhuber 2834f3eb5384SStefan Weinhuber /* 2835f3eb5384SStefan Weinhuber * The translation of request into ccw programs must meet the 2836f3eb5384SStefan Weinhuber * following conditions: 2837f3eb5384SStefan Weinhuber * - all idaws but the first and the last must address full pages 2838f3eb5384SStefan Weinhuber * (or 2K blocks on 31-bit) 2839f3eb5384SStefan Weinhuber * - the scope of a ccw and it's idal ends with the track boundaries 2840f3eb5384SStefan Weinhuber */ 2841f3eb5384SStefan Weinhuber idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); 2842f3eb5384SStefan Weinhuber recid = first_rec; 2843f3eb5384SStefan Weinhuber new_track = 1; 2844f3eb5384SStefan Weinhuber end_idaw = 0; 2845f3eb5384SStefan Weinhuber len_to_track_end = 0; 2846246ccea1SMartin Schwidefsky idaw_dst = NULL; 2847f3eb5384SStefan Weinhuber idaw_len = 0; 2848f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 28497988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 28507988613bSKent Overstreet seg_len = bv.bv_len; 2851f3eb5384SStefan Weinhuber while (seg_len) { 2852f3eb5384SStefan Weinhuber if (new_track) { 2853f3eb5384SStefan Weinhuber trkid = recid; 2854f3eb5384SStefan Weinhuber recoffs = sector_div(trkid, blk_per_trk); 2855f3eb5384SStefan Weinhuber count_to_trk_end = blk_per_trk - recoffs; 2856f3eb5384SStefan Weinhuber count = min((last_rec - recid + 1), 2857f3eb5384SStefan Weinhuber (sector_t)count_to_trk_end); 2858f3eb5384SStefan Weinhuber len_to_track_end = count * blksize; 2859f3eb5384SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 2860f3eb5384SStefan Weinhuber ccw->cmd_code = cmd; 2861f3eb5384SStefan Weinhuber ccw->count = len_to_track_end; 2862f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 2863f3eb5384SStefan Weinhuber ccw->flags = CCW_FLAG_IDA; 2864f3eb5384SStefan Weinhuber ccw++; 2865f3eb5384SStefan Weinhuber recid += count; 2866f3eb5384SStefan Weinhuber new_track = 0; 286752db45c3SStefan Weinhuber /* first idaw for a ccw may start anywhere */ 286852db45c3SStefan Weinhuber if (!idaw_dst) 286952db45c3SStefan Weinhuber idaw_dst = dst; 2870f3eb5384SStefan Weinhuber } 287152db45c3SStefan Weinhuber /* If we start a new idaw, we must make sure that it 287252db45c3SStefan Weinhuber * starts on an IDA_BLOCK_SIZE boundary. 2873f3eb5384SStefan Weinhuber * If we continue an idaw, we must make sure that the 2874f3eb5384SStefan Weinhuber * current segment begins where the so far accumulated 2875f3eb5384SStefan Weinhuber * idaw ends 2876f3eb5384SStefan Weinhuber */ 287752db45c3SStefan Weinhuber if (!idaw_dst) { 287852db45c3SStefan Weinhuber if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { 287952db45c3SStefan Weinhuber dasd_sfree_request(cqr, startdev); 288052db45c3SStefan Weinhuber return ERR_PTR(-ERANGE); 288152db45c3SStefan Weinhuber } else 2882f3eb5384SStefan Weinhuber idaw_dst = dst; 288352db45c3SStefan Weinhuber } 2884f3eb5384SStefan Weinhuber if ((idaw_dst + idaw_len) != dst) { 2885f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2886f3eb5384SStefan Weinhuber return ERR_PTR(-ERANGE); 2887f3eb5384SStefan Weinhuber } 2888f3eb5384SStefan Weinhuber part_len = min(seg_len, len_to_track_end); 2889f3eb5384SStefan Weinhuber seg_len -= part_len; 2890f3eb5384SStefan Weinhuber dst += part_len; 2891f3eb5384SStefan Weinhuber idaw_len += part_len; 2892f3eb5384SStefan Weinhuber len_to_track_end -= part_len; 2893f3eb5384SStefan Weinhuber /* collected memory area ends on an IDA_BLOCK border, 2894f3eb5384SStefan Weinhuber * -> create an idaw 2895f3eb5384SStefan Weinhuber * idal_create_words will handle cases where idaw_len 2896f3eb5384SStefan Weinhuber * is larger then IDA_BLOCK_SIZE 2897f3eb5384SStefan Weinhuber */ 2898f3eb5384SStefan Weinhuber if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) 2899f3eb5384SStefan Weinhuber end_idaw = 1; 2900f3eb5384SStefan Weinhuber /* We also need to end the idaw at track end */ 2901f3eb5384SStefan Weinhuber if (!len_to_track_end) { 2902f3eb5384SStefan Weinhuber new_track = 1; 2903f3eb5384SStefan Weinhuber end_idaw = 1; 2904f3eb5384SStefan Weinhuber } 2905f3eb5384SStefan Weinhuber if (end_idaw) { 2906f3eb5384SStefan Weinhuber idaws = idal_create_words(idaws, idaw_dst, 2907f3eb5384SStefan Weinhuber idaw_len); 2908246ccea1SMartin Schwidefsky idaw_dst = NULL; 2909f3eb5384SStefan Weinhuber idaw_len = 0; 2910f3eb5384SStefan Weinhuber end_idaw = 0; 2911f3eb5384SStefan Weinhuber } 2912f3eb5384SStefan Weinhuber } 2913f3eb5384SStefan Weinhuber } 2914f3eb5384SStefan Weinhuber 2915f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 2916f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 2917f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2918f3eb5384SStefan Weinhuber cqr->startdev = startdev; 2919f3eb5384SStefan Weinhuber cqr->memdev = startdev; 2920f3eb5384SStefan Weinhuber cqr->block = block; 29217c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2922a4d26c6aSStefan Weinhuber cqr->lpm = startdev->path_data.ppm; 29231f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 29241aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 2925f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 2926f3eb5384SStefan Weinhuber return cqr; 2927f3eb5384SStefan Weinhuber } 2928f3eb5384SStefan Weinhuber 2929f3eb5384SStefan Weinhuber static int prepare_itcw(struct itcw *itcw, 2930f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 2931f3eb5384SStefan Weinhuber struct dasd_device *basedev, 2932f3eb5384SStefan Weinhuber struct dasd_device *startdev, 2933f3eb5384SStefan Weinhuber unsigned int rec_on_trk, int count, 2934f3eb5384SStefan Weinhuber unsigned int blksize, 2935f3eb5384SStefan Weinhuber unsigned int total_data_size, 2936f3eb5384SStefan Weinhuber unsigned int tlf, 2937f3eb5384SStefan Weinhuber unsigned int blk_per_trk) 2938f3eb5384SStefan Weinhuber { 2939f3eb5384SStefan Weinhuber struct PFX_eckd_data pfxdata; 2940f3eb5384SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 2941f3eb5384SStefan Weinhuber struct DE_eckd_data *dedata; 2942f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 2943f3eb5384SStefan Weinhuber struct dcw *dcw; 2944f3eb5384SStefan Weinhuber 2945f3eb5384SStefan Weinhuber u32 begcyl, endcyl; 2946f3eb5384SStefan Weinhuber u16 heads, beghead, endhead; 2947f3eb5384SStefan Weinhuber u8 pfx_cmd; 2948f3eb5384SStefan Weinhuber 2949f3eb5384SStefan Weinhuber int rc = 0; 2950f3eb5384SStefan Weinhuber int sector = 0; 2951f3eb5384SStefan Weinhuber int dn, d; 2952f3eb5384SStefan Weinhuber 2953f3eb5384SStefan Weinhuber 2954f3eb5384SStefan Weinhuber /* setup prefix data */ 2955f3eb5384SStefan Weinhuber basepriv = (struct dasd_eckd_private *) basedev->private; 2956f3eb5384SStefan Weinhuber startpriv = (struct dasd_eckd_private *) startdev->private; 2957f3eb5384SStefan Weinhuber dedata = &pfxdata.define_extent; 2958f3eb5384SStefan Weinhuber lredata = &pfxdata.locate_record; 2959f3eb5384SStefan Weinhuber 2960f3eb5384SStefan Weinhuber memset(&pfxdata, 0, sizeof(pfxdata)); 2961f3eb5384SStefan Weinhuber pfxdata.format = 1; /* PFX with LRE */ 2962f3eb5384SStefan Weinhuber pfxdata.base_address = basepriv->ned->unit_addr; 2963f3eb5384SStefan Weinhuber pfxdata.base_lss = basepriv->ned->ID; 2964f3eb5384SStefan Weinhuber pfxdata.validity.define_extent = 1; 2965f3eb5384SStefan Weinhuber 2966f3eb5384SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 2967f3eb5384SStefan Weinhuber if (startpriv->uid.type != UA_BASE_DEVICE) { 2968f3eb5384SStefan Weinhuber pfxdata.validity.verify_base = 1; 2969f3eb5384SStefan Weinhuber if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 2970f3eb5384SStefan Weinhuber pfxdata.validity.hyper_pav = 1; 2971f3eb5384SStefan Weinhuber } 2972f3eb5384SStefan Weinhuber 2973f3eb5384SStefan Weinhuber switch (cmd) { 2974f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 2975f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 2976f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 2977f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 2978f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 2979f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 2980f3eb5384SStefan Weinhuber lredata->operation.operation = 0x0C; 2981f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x01; 2982f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX_READ; 2983f3eb5384SStefan Weinhuber break; 2984f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 2985f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 2986f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 2987f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 2988f3eb5384SStefan Weinhuber rc = check_XRC_on_prefix(&pfxdata, basedev); 2989f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 2990f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 2991f3eb5384SStefan Weinhuber lredata->operation.operation = 0x3F; 2992f3eb5384SStefan Weinhuber lredata->extended_operation = 0x23; 2993f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x2; 2994f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX; 2995f3eb5384SStefan Weinhuber break; 2996f3eb5384SStefan Weinhuber default: 2997f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 2998f3eb5384SStefan Weinhuber "prepare itcw, unknown opcode 0x%x", cmd); 2999f3eb5384SStefan Weinhuber BUG(); 3000f3eb5384SStefan Weinhuber break; 3001f3eb5384SStefan Weinhuber } 3002f3eb5384SStefan Weinhuber if (rc) 3003f3eb5384SStefan Weinhuber return rc; 3004f3eb5384SStefan Weinhuber 3005f3eb5384SStefan Weinhuber dedata->attributes.mode = 0x3; /* ECKD */ 3006f3eb5384SStefan Weinhuber 3007f3eb5384SStefan Weinhuber heads = basepriv->rdc_data.trk_per_cyl; 3008f3eb5384SStefan Weinhuber begcyl = trk / heads; 3009f3eb5384SStefan Weinhuber beghead = trk % heads; 3010f3eb5384SStefan Weinhuber endcyl = totrk / heads; 3011f3eb5384SStefan Weinhuber endhead = totrk % heads; 3012f3eb5384SStefan Weinhuber 3013f3eb5384SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 3014f3eb5384SStefan Weinhuber if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 3015f3eb5384SStefan Weinhuber dedata->attributes.operation == DASD_SEQ_ACCESS) { 3016f3eb5384SStefan Weinhuber 3017f3eb5384SStefan Weinhuber if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 3018f3eb5384SStefan Weinhuber endcyl += basepriv->attrib.nr_cyl; 3019f3eb5384SStefan Weinhuber else 3020f3eb5384SStefan Weinhuber endcyl = (basepriv->real_cyl - 1); 3021f3eb5384SStefan Weinhuber } 3022f3eb5384SStefan Weinhuber 3023f3eb5384SStefan Weinhuber set_ch_t(&dedata->beg_ext, begcyl, beghead); 3024f3eb5384SStefan Weinhuber set_ch_t(&dedata->end_ext, endcyl, endhead); 3025f3eb5384SStefan Weinhuber 3026f3eb5384SStefan Weinhuber dedata->ep_format = 0x20; /* records per track is valid */ 3027f3eb5384SStefan Weinhuber dedata->ep_rec_per_track = blk_per_trk; 3028f3eb5384SStefan Weinhuber 3029f3eb5384SStefan Weinhuber if (rec_on_trk) { 3030f3eb5384SStefan Weinhuber switch (basepriv->rdc_data.dev_type) { 3031f3eb5384SStefan Weinhuber case 0x3390: 3032f3eb5384SStefan Weinhuber dn = ceil_quot(blksize + 6, 232); 3033f3eb5384SStefan Weinhuber d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); 3034f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 3035f3eb5384SStefan Weinhuber break; 3036f3eb5384SStefan Weinhuber case 0x3380: 3037f3eb5384SStefan Weinhuber d = 7 + ceil_quot(blksize + 12, 32); 3038f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 3039f3eb5384SStefan Weinhuber break; 3040f3eb5384SStefan Weinhuber } 3041f3eb5384SStefan Weinhuber } 3042f3eb5384SStefan Weinhuber 3043f3eb5384SStefan Weinhuber lredata->auxiliary.length_valid = 1; 3044f3eb5384SStefan Weinhuber lredata->auxiliary.length_scope = 1; 3045f3eb5384SStefan Weinhuber lredata->auxiliary.imbedded_ccw_valid = 1; 3046f3eb5384SStefan Weinhuber lredata->length = tlf; 3047f3eb5384SStefan Weinhuber lredata->imbedded_ccw = cmd; 3048f3eb5384SStefan Weinhuber lredata->count = count; 3049f3eb5384SStefan Weinhuber lredata->sector = sector; 3050f3eb5384SStefan Weinhuber set_ch_t(&lredata->seek_addr, begcyl, beghead); 3051f3eb5384SStefan Weinhuber lredata->search_arg.cyl = lredata->seek_addr.cyl; 3052f3eb5384SStefan Weinhuber lredata->search_arg.head = lredata->seek_addr.head; 3053f3eb5384SStefan Weinhuber lredata->search_arg.record = rec_on_trk; 3054f3eb5384SStefan Weinhuber 3055f3eb5384SStefan Weinhuber dcw = itcw_add_dcw(itcw, pfx_cmd, 0, 3056f3eb5384SStefan Weinhuber &pfxdata, sizeof(pfxdata), total_data_size); 305782a7b955SThomas Meyer return PTR_RET(dcw); 3058f3eb5384SStefan Weinhuber } 3059f3eb5384SStefan Weinhuber 3060f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 3061f3eb5384SStefan Weinhuber struct dasd_device *startdev, 3062f3eb5384SStefan Weinhuber struct dasd_block *block, 3063f3eb5384SStefan Weinhuber struct request *req, 3064f3eb5384SStefan Weinhuber sector_t first_rec, 3065f3eb5384SStefan Weinhuber sector_t last_rec, 3066f3eb5384SStefan Weinhuber sector_t first_trk, 3067f3eb5384SStefan Weinhuber sector_t last_trk, 3068f3eb5384SStefan Weinhuber unsigned int first_offs, 3069f3eb5384SStefan Weinhuber unsigned int last_offs, 3070f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 3071f3eb5384SStefan Weinhuber unsigned int blksize) 3072f3eb5384SStefan Weinhuber { 3073f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 3074f3eb5384SStefan Weinhuber struct req_iterator iter; 30757988613bSKent Overstreet struct bio_vec bv; 3076f3eb5384SStefan Weinhuber char *dst; 3077f3eb5384SStefan Weinhuber unsigned int trkcount, ctidaw; 3078f3eb5384SStefan Weinhuber unsigned char cmd; 3079f3eb5384SStefan Weinhuber struct dasd_device *basedev; 3080f3eb5384SStefan Weinhuber unsigned int tlf; 3081f3eb5384SStefan Weinhuber struct itcw *itcw; 3082f3eb5384SStefan Weinhuber struct tidaw *last_tidaw = NULL; 3083f3eb5384SStefan Weinhuber int itcw_op; 3084f3eb5384SStefan Weinhuber size_t itcw_size; 3085ef19298bSStefan Weinhuber u8 tidaw_flags; 3086ef19298bSStefan Weinhuber unsigned int seg_len, part_len, len_to_track_end; 3087ef19298bSStefan Weinhuber unsigned char new_track; 3088ef19298bSStefan Weinhuber sector_t recid, trkid; 3089ef19298bSStefan Weinhuber unsigned int offs; 3090ef19298bSStefan Weinhuber unsigned int count, count_to_trk_end; 3091cd10502bSJulia Lawall int ret; 3092f3eb5384SStefan Weinhuber 3093f3eb5384SStefan Weinhuber basedev = block->base; 3094f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) { 3095f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 3096f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_READ; 3097f3eb5384SStefan Weinhuber } else if (rq_data_dir(req) == WRITE) { 3098f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 3099f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_WRITE; 3100f3eb5384SStefan Weinhuber } else 3101f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 3102f3eb5384SStefan Weinhuber 3103f3eb5384SStefan Weinhuber /* trackbased I/O needs address all memory via TIDAWs, 3104f3eb5384SStefan Weinhuber * not just for 64 bit addresses. This allows us to map 3105f3eb5384SStefan Weinhuber * each segment directly to one tidaw. 3106ef19298bSStefan Weinhuber * In the case of write requests, additional tidaws may 3107ef19298bSStefan Weinhuber * be needed when a segment crosses a track boundary. 3108f3eb5384SStefan Weinhuber */ 3109f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 3110f3eb5384SStefan Weinhuber ctidaw = 0; 3111f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 3112f3eb5384SStefan Weinhuber ++ctidaw; 3113f3eb5384SStefan Weinhuber } 3114ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 3115ef19298bSStefan Weinhuber ctidaw += (last_trk - first_trk); 3116f3eb5384SStefan Weinhuber 3117f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 3118f3eb5384SStefan Weinhuber itcw_size = itcw_calc_size(0, ctidaw, 0); 311968b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 3120f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 3121f3eb5384SStefan Weinhuber return cqr; 3122f3eb5384SStefan Weinhuber 3123f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 3124f3eb5384SStefan Weinhuber if (first_trk == last_trk) 3125f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 3126f3eb5384SStefan Weinhuber else 3127f3eb5384SStefan Weinhuber tlf = last_offs + 1; 3128f3eb5384SStefan Weinhuber tlf *= blksize; 3129f3eb5384SStefan Weinhuber 3130f3eb5384SStefan Weinhuber itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); 3131ef19298bSStefan Weinhuber if (IS_ERR(itcw)) { 3132cd10502bSJulia Lawall ret = -EINVAL; 3133cd10502bSJulia Lawall goto out_error; 3134ef19298bSStefan Weinhuber } 3135f3eb5384SStefan Weinhuber cqr->cpaddr = itcw_get_tcw(itcw); 3136f3eb5384SStefan Weinhuber if (prepare_itcw(itcw, first_trk, last_trk, 3137f3eb5384SStefan Weinhuber cmd, basedev, startdev, 3138f3eb5384SStefan Weinhuber first_offs + 1, 3139f3eb5384SStefan Weinhuber trkcount, blksize, 3140f3eb5384SStefan Weinhuber (last_rec - first_rec + 1) * blksize, 3141f3eb5384SStefan Weinhuber tlf, blk_per_trk) == -EAGAIN) { 3142f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 3143f3eb5384SStefan Weinhuber * Try again later. 3144f3eb5384SStefan Weinhuber */ 3145cd10502bSJulia Lawall ret = -EAGAIN; 3146cd10502bSJulia Lawall goto out_error; 3147f3eb5384SStefan Weinhuber } 3148d54cddb6SHeiko Carstens len_to_track_end = 0; 3149f3eb5384SStefan Weinhuber /* 3150f3eb5384SStefan Weinhuber * A tidaw can address 4k of memory, but must not cross page boundaries 3151f3eb5384SStefan Weinhuber * We can let the block layer handle this by setting 3152f3eb5384SStefan Weinhuber * blk_queue_segment_boundary to page boundaries and 3153f3eb5384SStefan Weinhuber * blk_max_segment_size to page size when setting up the request queue. 3154ef19298bSStefan Weinhuber * For write requests, a TIDAW must not cross track boundaries, because 3155ef19298bSStefan Weinhuber * we have to set the CBC flag on the last tidaw for each track. 3156f3eb5384SStefan Weinhuber */ 3157ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) { 3158ef19298bSStefan Weinhuber new_track = 1; 3159ef19298bSStefan Weinhuber recid = first_rec; 3160f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 31617988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 31627988613bSKent Overstreet seg_len = bv.bv_len; 3163ef19298bSStefan Weinhuber while (seg_len) { 3164ef19298bSStefan Weinhuber if (new_track) { 3165ef19298bSStefan Weinhuber trkid = recid; 3166ef19298bSStefan Weinhuber offs = sector_div(trkid, blk_per_trk); 3167ef19298bSStefan Weinhuber count_to_trk_end = blk_per_trk - offs; 3168ef19298bSStefan Weinhuber count = min((last_rec - recid + 1), 3169ef19298bSStefan Weinhuber (sector_t)count_to_trk_end); 3170ef19298bSStefan Weinhuber len_to_track_end = count * blksize; 3171ef19298bSStefan Weinhuber recid += count; 3172ef19298bSStefan Weinhuber new_track = 0; 3173f3eb5384SStefan Weinhuber } 3174ef19298bSStefan Weinhuber part_len = min(seg_len, len_to_track_end); 3175ef19298bSStefan Weinhuber seg_len -= part_len; 3176ef19298bSStefan Weinhuber len_to_track_end -= part_len; 3177ef19298bSStefan Weinhuber /* We need to end the tidaw at track end */ 3178ef19298bSStefan Weinhuber if (!len_to_track_end) { 3179ef19298bSStefan Weinhuber new_track = 1; 3180ef19298bSStefan Weinhuber tidaw_flags = TIDAW_FLAGS_INSERT_CBC; 3181ef19298bSStefan Weinhuber } else 3182ef19298bSStefan Weinhuber tidaw_flags = 0; 3183ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, 3184ef19298bSStefan Weinhuber dst, part_len); 3185cd10502bSJulia Lawall if (IS_ERR(last_tidaw)) { 3186cd10502bSJulia Lawall ret = -EINVAL; 3187cd10502bSJulia Lawall goto out_error; 3188cd10502bSJulia Lawall } 3189ef19298bSStefan Weinhuber dst += part_len; 3190ef19298bSStefan Weinhuber } 3191ef19298bSStefan Weinhuber } 3192ef19298bSStefan Weinhuber } else { 3193ef19298bSStefan Weinhuber rq_for_each_segment(bv, req, iter) { 31947988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 3195ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, 0x00, 31967988613bSKent Overstreet dst, bv.bv_len); 3197cd10502bSJulia Lawall if (IS_ERR(last_tidaw)) { 3198cd10502bSJulia Lawall ret = -EINVAL; 3199cd10502bSJulia Lawall goto out_error; 3200cd10502bSJulia Lawall } 3201ef19298bSStefan Weinhuber } 3202ef19298bSStefan Weinhuber } 3203ef19298bSStefan Weinhuber last_tidaw->flags |= TIDAW_FLAGS_LAST; 3204ef19298bSStefan Weinhuber last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; 3205f3eb5384SStefan Weinhuber itcw_finalize(itcw); 3206f3eb5384SStefan Weinhuber 3207f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 3208f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 3209f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3210ef19298bSStefan Weinhuber cqr->cpmode = 1; 3211f3eb5384SStefan Weinhuber cqr->startdev = startdev; 3212f3eb5384SStefan Weinhuber cqr->memdev = startdev; 3213f3eb5384SStefan Weinhuber cqr->block = block; 32147c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 3215a4d26c6aSStefan Weinhuber cqr->lpm = startdev->path_data.ppm; 32161f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 32171aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 3218f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 3219f3eb5384SStefan Weinhuber return cqr; 3220cd10502bSJulia Lawall out_error: 3221cd10502bSJulia Lawall dasd_sfree_request(cqr, startdev); 3222cd10502bSJulia Lawall return ERR_PTR(ret); 3223f3eb5384SStefan Weinhuber } 3224f3eb5384SStefan Weinhuber 3225f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 3226f3eb5384SStefan Weinhuber struct dasd_block *block, 3227f3eb5384SStefan Weinhuber struct request *req) 3228f3eb5384SStefan Weinhuber { 3229ef19298bSStefan Weinhuber int cmdrtd, cmdwtd; 3230f3eb5384SStefan Weinhuber int use_prefix; 3231ef19298bSStefan Weinhuber int fcx_multitrack; 323245b44d76SStefan Weinhuber struct dasd_eckd_private *private; 3233f3eb5384SStefan Weinhuber struct dasd_device *basedev; 3234f3eb5384SStefan Weinhuber sector_t first_rec, last_rec; 3235f3eb5384SStefan Weinhuber sector_t first_trk, last_trk; 3236f3eb5384SStefan Weinhuber unsigned int first_offs, last_offs; 3237f3eb5384SStefan Weinhuber unsigned int blk_per_trk, blksize; 3238f3eb5384SStefan Weinhuber int cdlspecial; 3239ef19298bSStefan Weinhuber unsigned int data_size; 3240f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 3241f3eb5384SStefan Weinhuber 3242f3eb5384SStefan Weinhuber basedev = block->base; 3243f3eb5384SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 3244f3eb5384SStefan Weinhuber 3245f3eb5384SStefan Weinhuber /* Calculate number of blocks/records per track. */ 3246f3eb5384SStefan Weinhuber blksize = block->bp_block; 3247f3eb5384SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 32486fca97a9SStefan Haberland if (blk_per_trk == 0) 32496fca97a9SStefan Haberland return ERR_PTR(-EINVAL); 3250f3eb5384SStefan Weinhuber /* Calculate record id of first and last block. */ 325183096ebfSTejun Heo first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; 3252f3eb5384SStefan Weinhuber first_offs = sector_div(first_trk, blk_per_trk); 3253f3eb5384SStefan Weinhuber last_rec = last_trk = 325483096ebfSTejun Heo (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 3255f3eb5384SStefan Weinhuber last_offs = sector_div(last_trk, blk_per_trk); 3256f3eb5384SStefan Weinhuber cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); 3257f3eb5384SStefan Weinhuber 3258ef19298bSStefan Weinhuber fcx_multitrack = private->features.feature[40] & 0x20; 3259ef19298bSStefan Weinhuber data_size = blk_rq_bytes(req); 326026a35f37SStefan Weinhuber if (data_size % blksize) 326126a35f37SStefan Weinhuber return ERR_PTR(-EINVAL); 3262ef19298bSStefan Weinhuber /* tpm write request add CBC data on each track boundary */ 3263ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 3264ef19298bSStefan Weinhuber data_size += (last_trk - first_trk) * 4; 3265f3eb5384SStefan Weinhuber 3266f3eb5384SStefan Weinhuber /* is read track data and write track data in command mode supported? */ 3267f3eb5384SStefan Weinhuber cmdrtd = private->features.feature[9] & 0x20; 3268f3eb5384SStefan Weinhuber cmdwtd = private->features.feature[12] & 0x40; 3269f3eb5384SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 3270f3eb5384SStefan Weinhuber 3271f3eb5384SStefan Weinhuber cqr = NULL; 3272f3eb5384SStefan Weinhuber if (cdlspecial || dasd_page_cache) { 3273f3eb5384SStefan Weinhuber /* do nothing, just fall through to the cmd mode single case */ 3274ef19298bSStefan Weinhuber } else if ((data_size <= private->fcx_max_data) 3275ef19298bSStefan Weinhuber && (fcx_multitrack || (first_trk == last_trk))) { 3276f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, 3277f3eb5384SStefan Weinhuber first_rec, last_rec, 3278f3eb5384SStefan Weinhuber first_trk, last_trk, 3279f3eb5384SStefan Weinhuber first_offs, last_offs, 3280f3eb5384SStefan Weinhuber blk_per_trk, blksize); 3281ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3282ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 3283f3eb5384SStefan Weinhuber cqr = NULL; 3284f3eb5384SStefan Weinhuber } else if (use_prefix && 3285f3eb5384SStefan Weinhuber (((rq_data_dir(req) == READ) && cmdrtd) || 3286f3eb5384SStefan Weinhuber ((rq_data_dir(req) == WRITE) && cmdwtd))) { 3287f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, 3288f3eb5384SStefan Weinhuber first_rec, last_rec, 3289f3eb5384SStefan Weinhuber first_trk, last_trk, 3290f3eb5384SStefan Weinhuber first_offs, last_offs, 3291f3eb5384SStefan Weinhuber blk_per_trk, blksize); 3292ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3293ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 3294f3eb5384SStefan Weinhuber cqr = NULL; 3295f3eb5384SStefan Weinhuber } 3296f3eb5384SStefan Weinhuber if (!cqr) 3297f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, 3298f3eb5384SStefan Weinhuber first_rec, last_rec, 3299f3eb5384SStefan Weinhuber first_trk, last_trk, 3300f3eb5384SStefan Weinhuber first_offs, last_offs, 3301f3eb5384SStefan Weinhuber blk_per_trk, blksize); 3302f3eb5384SStefan Weinhuber return cqr; 3303f3eb5384SStefan Weinhuber } 3304f3eb5384SStefan Weinhuber 3305e4dbb0f2SStefan Haberland static struct dasd_ccw_req *dasd_raw_build_cp(struct dasd_device *startdev, 3306e4dbb0f2SStefan Haberland struct dasd_block *block, 3307e4dbb0f2SStefan Haberland struct request *req) 3308e4dbb0f2SStefan Haberland { 3309e4dbb0f2SStefan Haberland unsigned long *idaws; 3310e4dbb0f2SStefan Haberland struct dasd_device *basedev; 3311e4dbb0f2SStefan Haberland struct dasd_ccw_req *cqr; 3312e4dbb0f2SStefan Haberland struct ccw1 *ccw; 3313e4dbb0f2SStefan Haberland struct req_iterator iter; 33147988613bSKent Overstreet struct bio_vec bv; 3315e4dbb0f2SStefan Haberland char *dst; 3316e4dbb0f2SStefan Haberland unsigned char cmd; 3317e4dbb0f2SStefan Haberland unsigned int trkcount; 3318e4dbb0f2SStefan Haberland unsigned int seg_len, len_to_track_end; 3319e4dbb0f2SStefan Haberland unsigned int first_offs; 3320e4dbb0f2SStefan Haberland unsigned int cidaw, cplength, datasize; 3321558b9ef0SStefan Weinhuber sector_t first_trk, last_trk, sectors; 3322558b9ef0SStefan Weinhuber sector_t start_padding_sectors, end_sector_offset, end_padding_sectors; 3323e4dbb0f2SStefan Haberland unsigned int pfx_datasize; 3324e4dbb0f2SStefan Haberland 3325e4dbb0f2SStefan Haberland /* 3326e4dbb0f2SStefan Haberland * raw track access needs to be mutiple of 64k and on 64k boundary 3327558b9ef0SStefan Weinhuber * For read requests we can fix an incorrect alignment by padding 3328558b9ef0SStefan Weinhuber * the request with dummy pages. 3329e4dbb0f2SStefan Haberland */ 3330558b9ef0SStefan Weinhuber start_padding_sectors = blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK; 3331558b9ef0SStefan Weinhuber end_sector_offset = (blk_rq_pos(req) + blk_rq_sectors(req)) % 3332558b9ef0SStefan Weinhuber DASD_RAW_SECTORS_PER_TRACK; 3333558b9ef0SStefan Weinhuber end_padding_sectors = (DASD_RAW_SECTORS_PER_TRACK - end_sector_offset) % 3334558b9ef0SStefan Weinhuber DASD_RAW_SECTORS_PER_TRACK; 3335558b9ef0SStefan Weinhuber basedev = block->base; 3336558b9ef0SStefan Weinhuber if ((start_padding_sectors || end_padding_sectors) && 3337558b9ef0SStefan Weinhuber (rq_data_dir(req) == WRITE)) { 3338558b9ef0SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 3339558b9ef0SStefan Weinhuber "raw write not track aligned (%lu,%lu) req %p", 3340558b9ef0SStefan Weinhuber start_padding_sectors, end_padding_sectors, req); 3341e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EINVAL); 3342e4dbb0f2SStefan Haberland goto out; 3343e4dbb0f2SStefan Haberland } 3344e4dbb0f2SStefan Haberland 3345e4dbb0f2SStefan Haberland first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; 3346e4dbb0f2SStefan Haberland last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / 3347e4dbb0f2SStefan Haberland DASD_RAW_SECTORS_PER_TRACK; 3348e4dbb0f2SStefan Haberland trkcount = last_trk - first_trk + 1; 3349e4dbb0f2SStefan Haberland first_offs = 0; 3350e4dbb0f2SStefan Haberland 3351e4dbb0f2SStefan Haberland if (rq_data_dir(req) == READ) 3352e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_READ_TRACK; 3353e4dbb0f2SStefan Haberland else if (rq_data_dir(req) == WRITE) 3354e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; 3355e4dbb0f2SStefan Haberland else { 3356e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EINVAL); 3357e4dbb0f2SStefan Haberland goto out; 3358e4dbb0f2SStefan Haberland } 3359e4dbb0f2SStefan Haberland 3360e4dbb0f2SStefan Haberland /* 3361e4dbb0f2SStefan Haberland * Raw track based I/O needs IDAWs for each page, 3362e4dbb0f2SStefan Haberland * and not just for 64 bit addresses. 3363e4dbb0f2SStefan Haberland */ 3364e4dbb0f2SStefan Haberland cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; 3365e4dbb0f2SStefan Haberland 3366e4dbb0f2SStefan Haberland /* 1x prefix + one read/write ccw per track */ 3367e4dbb0f2SStefan Haberland cplength = 1 + trkcount; 3368e4dbb0f2SStefan Haberland 3369e4dbb0f2SStefan Haberland /* 3370e4dbb0f2SStefan Haberland * struct PFX_eckd_data has up to 2 byte as extended parameter 3371e4dbb0f2SStefan Haberland * this is needed for write full track and has to be mentioned 337225985edcSLucas De Marchi * separately 3373e4dbb0f2SStefan Haberland * add 8 instead of 2 to keep 8 byte boundary 3374e4dbb0f2SStefan Haberland */ 3375e4dbb0f2SStefan Haberland pfx_datasize = sizeof(struct PFX_eckd_data) + 8; 3376e4dbb0f2SStefan Haberland 3377e4dbb0f2SStefan Haberland datasize = pfx_datasize + cidaw * sizeof(unsigned long long); 3378e4dbb0f2SStefan Haberland 3379e4dbb0f2SStefan Haberland /* Allocate the ccw request. */ 3380e4dbb0f2SStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 3381e4dbb0f2SStefan Haberland datasize, startdev); 3382e4dbb0f2SStefan Haberland if (IS_ERR(cqr)) 3383e4dbb0f2SStefan Haberland goto out; 3384e4dbb0f2SStefan Haberland ccw = cqr->cpaddr; 3385e4dbb0f2SStefan Haberland 3386e4dbb0f2SStefan Haberland if (prefix_LRE(ccw++, cqr->data, first_trk, last_trk, cmd, 3387e4dbb0f2SStefan Haberland basedev, startdev, 1 /* format */, first_offs + 1, 3388e4dbb0f2SStefan Haberland trkcount, 0, 0) == -EAGAIN) { 3389e4dbb0f2SStefan Haberland /* Clock not in sync and XRC is enabled. 3390e4dbb0f2SStefan Haberland * Try again later. 3391e4dbb0f2SStefan Haberland */ 3392e4dbb0f2SStefan Haberland dasd_sfree_request(cqr, startdev); 3393e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EAGAIN); 3394e4dbb0f2SStefan Haberland goto out; 3395e4dbb0f2SStefan Haberland } 3396e4dbb0f2SStefan Haberland 3397e4dbb0f2SStefan Haberland idaws = (unsigned long *)(cqr->data + pfx_datasize); 3398e4dbb0f2SStefan Haberland len_to_track_end = 0; 3399558b9ef0SStefan Weinhuber if (start_padding_sectors) { 3400558b9ef0SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 3401558b9ef0SStefan Weinhuber ccw->cmd_code = cmd; 3402558b9ef0SStefan Weinhuber /* maximum 3390 track size */ 3403558b9ef0SStefan Weinhuber ccw->count = 57326; 3404558b9ef0SStefan Weinhuber /* 64k map to one track */ 3405558b9ef0SStefan Weinhuber len_to_track_end = 65536 - start_padding_sectors * 512; 3406558b9ef0SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 3407558b9ef0SStefan Weinhuber ccw->flags |= CCW_FLAG_IDA; 3408558b9ef0SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3409558b9ef0SStefan Weinhuber ccw++; 3410558b9ef0SStefan Weinhuber for (sectors = 0; sectors < start_padding_sectors; sectors += 8) 3411558b9ef0SStefan Weinhuber idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 3412558b9ef0SStefan Weinhuber } 3413e4dbb0f2SStefan Haberland rq_for_each_segment(bv, req, iter) { 34147988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 34157988613bSKent Overstreet seg_len = bv.bv_len; 3416558b9ef0SStefan Weinhuber if (cmd == DASD_ECKD_CCW_READ_TRACK) 3417558b9ef0SStefan Weinhuber memset(dst, 0, seg_len); 3418e4dbb0f2SStefan Haberland if (!len_to_track_end) { 3419e4dbb0f2SStefan Haberland ccw[-1].flags |= CCW_FLAG_CC; 3420e4dbb0f2SStefan Haberland ccw->cmd_code = cmd; 3421e4dbb0f2SStefan Haberland /* maximum 3390 track size */ 3422e4dbb0f2SStefan Haberland ccw->count = 57326; 3423e4dbb0f2SStefan Haberland /* 64k map to one track */ 3424e4dbb0f2SStefan Haberland len_to_track_end = 65536; 3425e4dbb0f2SStefan Haberland ccw->cda = (__u32)(addr_t)idaws; 3426e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_IDA; 3427e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 3428e4dbb0f2SStefan Haberland ccw++; 3429e4dbb0f2SStefan Haberland } 3430e4dbb0f2SStefan Haberland len_to_track_end -= seg_len; 3431e4dbb0f2SStefan Haberland idaws = idal_create_words(idaws, dst, seg_len); 3432e4dbb0f2SStefan Haberland } 3433558b9ef0SStefan Weinhuber for (sectors = 0; sectors < end_padding_sectors; sectors += 8) 3434558b9ef0SStefan Weinhuber idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 3435e4dbb0f2SStefan Haberland if (blk_noretry_request(req) || 3436e4dbb0f2SStefan Haberland block->base->features & DASD_FEATURE_FAILFAST) 3437e4dbb0f2SStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3438e4dbb0f2SStefan Haberland cqr->startdev = startdev; 3439e4dbb0f2SStefan Haberland cqr->memdev = startdev; 3440e4dbb0f2SStefan Haberland cqr->block = block; 3441e4dbb0f2SStefan Haberland cqr->expires = startdev->default_expires * HZ; 3442e4dbb0f2SStefan Haberland cqr->lpm = startdev->path_data.ppm; 34431f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 34441aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 3445e4dbb0f2SStefan Haberland cqr->status = DASD_CQR_FILLED; 3446e4dbb0f2SStefan Haberland 3447e4dbb0f2SStefan Haberland if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN) 3448e4dbb0f2SStefan Haberland cqr = NULL; 3449e4dbb0f2SStefan Haberland out: 3450e4dbb0f2SStefan Haberland return cqr; 3451e4dbb0f2SStefan Haberland } 3452e4dbb0f2SStefan Haberland 3453e4dbb0f2SStefan Haberland 34541da177e4SLinus Torvalds static int 34551da177e4SLinus Torvalds dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 34561da177e4SLinus Torvalds { 34571da177e4SLinus Torvalds struct dasd_eckd_private *private; 34581da177e4SLinus Torvalds struct ccw1 *ccw; 34595705f702SNeilBrown struct req_iterator iter; 34607988613bSKent Overstreet struct bio_vec bv; 34611da177e4SLinus Torvalds char *dst, *cda; 34621da177e4SLinus Torvalds unsigned int blksize, blk_per_trk, off; 34631da177e4SLinus Torvalds sector_t recid; 34645705f702SNeilBrown int status; 34651da177e4SLinus Torvalds 34661da177e4SLinus Torvalds if (!dasd_page_cache) 34671da177e4SLinus Torvalds goto out; 34688e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) cqr->block->base->private; 34698e09f215SStefan Weinhuber blksize = cqr->block->bp_block; 34701da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 347183096ebfSTejun Heo recid = blk_rq_pos(req) >> cqr->block->s2b_shift; 34721da177e4SLinus Torvalds ccw = cqr->cpaddr; 34731da177e4SLinus Torvalds /* Skip over define extent & locate record. */ 34741da177e4SLinus Torvalds ccw++; 34751da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 34761da177e4SLinus Torvalds ccw++; 34775705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 34787988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 34797988613bSKent Overstreet for (off = 0; off < bv.bv_len; off += blksize) { 34801da177e4SLinus Torvalds /* Skip locate record. */ 34811da177e4SLinus Torvalds if (private->uses_cdl && recid <= 2*blk_per_trk) 34821da177e4SLinus Torvalds ccw++; 34831da177e4SLinus Torvalds if (dst) { 34841da177e4SLinus Torvalds if (ccw->flags & CCW_FLAG_IDA) 34851da177e4SLinus Torvalds cda = *((char **)((addr_t) ccw->cda)); 34861da177e4SLinus Torvalds else 34871da177e4SLinus Torvalds cda = (char *)((addr_t) ccw->cda); 34881da177e4SLinus Torvalds if (dst != cda) { 34891da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 34907988613bSKent Overstreet memcpy(dst, cda, bv.bv_len); 34911da177e4SLinus Torvalds kmem_cache_free(dasd_page_cache, 34921da177e4SLinus Torvalds (void *)((addr_t)cda & PAGE_MASK)); 34931da177e4SLinus Torvalds } 34941da177e4SLinus Torvalds dst = NULL; 34951da177e4SLinus Torvalds } 34961da177e4SLinus Torvalds ccw++; 34971da177e4SLinus Torvalds recid++; 34981da177e4SLinus Torvalds } 34991da177e4SLinus Torvalds } 35001da177e4SLinus Torvalds out: 35011da177e4SLinus Torvalds status = cqr->status == DASD_CQR_DONE; 35028e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 35031da177e4SLinus Torvalds return status; 35041da177e4SLinus Torvalds } 35051da177e4SLinus Torvalds 35068e09f215SStefan Weinhuber /* 3507f3eb5384SStefan Weinhuber * Modify ccw/tcw in cqr so it can be started on a base device. 35088e09f215SStefan Weinhuber * 35098e09f215SStefan Weinhuber * Note that this is not enough to restart the cqr! 35108e09f215SStefan Weinhuber * Either reset cqr->startdev as well (summary unit check handling) 35118e09f215SStefan Weinhuber * or restart via separate cqr (as in ERP handling). 35128e09f215SStefan Weinhuber */ 35138e09f215SStefan Weinhuber void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 35148e09f215SStefan Weinhuber { 35158e09f215SStefan Weinhuber struct ccw1 *ccw; 35168e09f215SStefan Weinhuber struct PFX_eckd_data *pfxdata; 3517f3eb5384SStefan Weinhuber struct tcw *tcw; 3518f3eb5384SStefan Weinhuber struct tccb *tccb; 3519f3eb5384SStefan Weinhuber struct dcw *dcw; 35208e09f215SStefan Weinhuber 3521f3eb5384SStefan Weinhuber if (cqr->cpmode == 1) { 3522f3eb5384SStefan Weinhuber tcw = cqr->cpaddr; 3523f3eb5384SStefan Weinhuber tccb = tcw_get_tccb(tcw); 3524f3eb5384SStefan Weinhuber dcw = (struct dcw *)&tccb->tca[0]; 3525f3eb5384SStefan Weinhuber pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; 3526f3eb5384SStefan Weinhuber pfxdata->validity.verify_base = 0; 3527f3eb5384SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 3528f3eb5384SStefan Weinhuber } else { 35298e09f215SStefan Weinhuber ccw = cqr->cpaddr; 35308e09f215SStefan Weinhuber pfxdata = cqr->data; 35318e09f215SStefan Weinhuber if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 35328e09f215SStefan Weinhuber pfxdata->validity.verify_base = 0; 35338e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 35348e09f215SStefan Weinhuber } 35358e09f215SStefan Weinhuber } 3536f3eb5384SStefan Weinhuber } 35378e09f215SStefan Weinhuber 35388e09f215SStefan Weinhuber #define DASD_ECKD_CHANQ_MAX_SIZE 4 35398e09f215SStefan Weinhuber 35408e09f215SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 35418e09f215SStefan Weinhuber struct dasd_block *block, 35428e09f215SStefan Weinhuber struct request *req) 35438e09f215SStefan Weinhuber { 35448e09f215SStefan Weinhuber struct dasd_eckd_private *private; 35458e09f215SStefan Weinhuber struct dasd_device *startdev; 35468e09f215SStefan Weinhuber unsigned long flags; 35478e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 35488e09f215SStefan Weinhuber 35498e09f215SStefan Weinhuber startdev = dasd_alias_get_start_dev(base); 35508e09f215SStefan Weinhuber if (!startdev) 35518e09f215SStefan Weinhuber startdev = base; 35528e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) startdev->private; 35538e09f215SStefan Weinhuber if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 35548e09f215SStefan Weinhuber return ERR_PTR(-EBUSY); 35558e09f215SStefan Weinhuber 35568e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 35578e09f215SStefan Weinhuber private->count++; 3558e4dbb0f2SStefan Haberland if ((base->features & DASD_FEATURE_USERAW)) 3559e4dbb0f2SStefan Haberland cqr = dasd_raw_build_cp(startdev, block, req); 3560e4dbb0f2SStefan Haberland else 35618e09f215SStefan Weinhuber cqr = dasd_eckd_build_cp(startdev, block, req); 35628e09f215SStefan Weinhuber if (IS_ERR(cqr)) 35638e09f215SStefan Weinhuber private->count--; 35648e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 35658e09f215SStefan Weinhuber return cqr; 35668e09f215SStefan Weinhuber } 35678e09f215SStefan Weinhuber 35688e09f215SStefan Weinhuber static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 35698e09f215SStefan Weinhuber struct request *req) 35708e09f215SStefan Weinhuber { 35718e09f215SStefan Weinhuber struct dasd_eckd_private *private; 35728e09f215SStefan Weinhuber unsigned long flags; 35738e09f215SStefan Weinhuber 35748e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 35758e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) cqr->memdev->private; 35768e09f215SStefan Weinhuber private->count--; 35778e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 35788e09f215SStefan Weinhuber return dasd_eckd_free_cp(cqr, req); 35798e09f215SStefan Weinhuber } 35808e09f215SStefan Weinhuber 35811da177e4SLinus Torvalds static int 35821da177e4SLinus Torvalds dasd_eckd_fill_info(struct dasd_device * device, 35831da177e4SLinus Torvalds struct dasd_information2_t * info) 35841da177e4SLinus Torvalds { 35851da177e4SLinus Torvalds struct dasd_eckd_private *private; 35861da177e4SLinus Torvalds 35871da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 35881da177e4SLinus Torvalds info->label_block = 2; 35891da177e4SLinus Torvalds info->FBA_layout = private->uses_cdl ? 0 : 1; 35901da177e4SLinus Torvalds info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 35911da177e4SLinus Torvalds info->characteristics_size = sizeof(struct dasd_eckd_characteristics); 35921da177e4SLinus Torvalds memcpy(info->characteristics, &private->rdc_data, 35931da177e4SLinus Torvalds sizeof(struct dasd_eckd_characteristics)); 35944abb08c2SStefan Weinhuber info->confdata_size = min((unsigned long)private->conf_len, 35954abb08c2SStefan Weinhuber sizeof(info->configuration_data)); 35964abb08c2SStefan Weinhuber memcpy(info->configuration_data, private->conf_data, 35974abb08c2SStefan Weinhuber info->confdata_size); 35981da177e4SLinus Torvalds return 0; 35991da177e4SLinus Torvalds } 36001da177e4SLinus Torvalds 36011da177e4SLinus Torvalds /* 36021da177e4SLinus Torvalds * SECTION: ioctl functions for eckd devices. 36031da177e4SLinus Torvalds */ 36041da177e4SLinus Torvalds 36051da177e4SLinus Torvalds /* 36061da177e4SLinus Torvalds * Release device ioctl. 36071da177e4SLinus Torvalds * Buils a channel programm to releases a prior reserved 36081da177e4SLinus Torvalds * (see dasd_eckd_reserve) device. 36091da177e4SLinus Torvalds */ 36101da177e4SLinus Torvalds static int 36111107ccfbSChristoph Hellwig dasd_eckd_release(struct dasd_device *device) 36121da177e4SLinus Torvalds { 36131da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 36141da177e4SLinus Torvalds int rc; 3615f3eb5384SStefan Weinhuber struct ccw1 *ccw; 3616f932bceaSStefan Weinhuber int useglobal; 36171da177e4SLinus Torvalds 36181da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 36191da177e4SLinus Torvalds return -EACCES; 36201da177e4SLinus Torvalds 3621f932bceaSStefan Weinhuber useglobal = 0; 362268b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 36231da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3624f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3625f932bceaSStefan Weinhuber useglobal = 1; 3626f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3627f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3628f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3629f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3630f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3631f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3632f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 36331da177e4SLinus Torvalds } 3634f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 3635f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RELEASE; 3636f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3637f3eb5384SStefan Weinhuber ccw->count = 32; 3638f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 36398e09f215SStefan Weinhuber cqr->startdev = device; 36408e09f215SStefan Weinhuber cqr->memdev = device; 36411da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 36421c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3643336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 36441da177e4SLinus Torvalds cqr->expires = 2 * HZ; 36451aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 36461da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 36471da177e4SLinus Torvalds 36481da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 36495a27e60dSStefan Weinhuber if (!rc) 36505a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 36511da177e4SLinus Torvalds 3652f932bceaSStefan Weinhuber if (useglobal) 3653f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3654f932bceaSStefan Weinhuber else 36558e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 36561da177e4SLinus Torvalds return rc; 36571da177e4SLinus Torvalds } 36581da177e4SLinus Torvalds 36591da177e4SLinus Torvalds /* 36601da177e4SLinus Torvalds * Reserve device ioctl. 36611da177e4SLinus Torvalds * Options are set to 'synchronous wait for interrupt' and 36621da177e4SLinus Torvalds * 'timeout the request'. This leads to a terminate IO if 36631da177e4SLinus Torvalds * the interrupt is outstanding for a certain time. 36641da177e4SLinus Torvalds */ 36651da177e4SLinus Torvalds static int 36661107ccfbSChristoph Hellwig dasd_eckd_reserve(struct dasd_device *device) 36671da177e4SLinus Torvalds { 36681da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 36691da177e4SLinus Torvalds int rc; 3670f3eb5384SStefan Weinhuber struct ccw1 *ccw; 3671f932bceaSStefan Weinhuber int useglobal; 36721da177e4SLinus Torvalds 36731da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 36741da177e4SLinus Torvalds return -EACCES; 36751da177e4SLinus Torvalds 3676f932bceaSStefan Weinhuber useglobal = 0; 367768b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 36781da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3679f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3680f932bceaSStefan Weinhuber useglobal = 1; 3681f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3682f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3683f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3684f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3685f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3686f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3687f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 36881da177e4SLinus Torvalds } 3689f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 3690f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RESERVE; 3691f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3692f3eb5384SStefan Weinhuber ccw->count = 32; 3693f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 36948e09f215SStefan Weinhuber cqr->startdev = device; 36958e09f215SStefan Weinhuber cqr->memdev = device; 36961da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 36971c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3698336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 36991da177e4SLinus Torvalds cqr->expires = 2 * HZ; 37001aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 37011da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 37021da177e4SLinus Torvalds 37031da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 37045a27e60dSStefan Weinhuber if (!rc) 37055a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 37061da177e4SLinus Torvalds 3707f932bceaSStefan Weinhuber if (useglobal) 3708f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3709f932bceaSStefan Weinhuber else 37108e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 37111da177e4SLinus Torvalds return rc; 37121da177e4SLinus Torvalds } 37131da177e4SLinus Torvalds 37141da177e4SLinus Torvalds /* 37151da177e4SLinus Torvalds * Steal lock ioctl - unconditional reserve device. 37161da177e4SLinus Torvalds * Buils a channel programm to break a device's reservation. 37171da177e4SLinus Torvalds * (unconditional reserve) 37181da177e4SLinus Torvalds */ 37191da177e4SLinus Torvalds static int 37201107ccfbSChristoph Hellwig dasd_eckd_steal_lock(struct dasd_device *device) 37211da177e4SLinus Torvalds { 37221da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 37231da177e4SLinus Torvalds int rc; 3724f3eb5384SStefan Weinhuber struct ccw1 *ccw; 3725f932bceaSStefan Weinhuber int useglobal; 37261da177e4SLinus Torvalds 37271da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 37281da177e4SLinus Torvalds return -EACCES; 37291da177e4SLinus Torvalds 3730f932bceaSStefan Weinhuber useglobal = 0; 373168b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 37321da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3733f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3734f932bceaSStefan Weinhuber useglobal = 1; 3735f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3736f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3737f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3738f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3739f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3740f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3741f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 37421da177e4SLinus Torvalds } 3743f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 3744f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SLCK; 3745f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3746f3eb5384SStefan Weinhuber ccw->count = 32; 3747f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 37488e09f215SStefan Weinhuber cqr->startdev = device; 37498e09f215SStefan Weinhuber cqr->memdev = device; 37501da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 37511c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3752336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 37531da177e4SLinus Torvalds cqr->expires = 2 * HZ; 37541aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 37551da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 37561da177e4SLinus Torvalds 37571da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 37585a27e60dSStefan Weinhuber if (!rc) 37595a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 37601da177e4SLinus Torvalds 3761f932bceaSStefan Weinhuber if (useglobal) 3762f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3763f932bceaSStefan Weinhuber else 37648e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 37651da177e4SLinus Torvalds return rc; 37661da177e4SLinus Torvalds } 37671da177e4SLinus Torvalds 37681da177e4SLinus Torvalds /* 3769196339f1SStefan Weinhuber * SNID - Sense Path Group ID 3770196339f1SStefan Weinhuber * This ioctl may be used in situations where I/O is stalled due to 3771196339f1SStefan Weinhuber * a reserve, so if the normal dasd_smalloc_request fails, we use the 3772196339f1SStefan Weinhuber * preallocated dasd_reserve_req. 3773196339f1SStefan Weinhuber */ 3774196339f1SStefan Weinhuber static int dasd_eckd_snid(struct dasd_device *device, 3775196339f1SStefan Weinhuber void __user *argp) 3776196339f1SStefan Weinhuber { 3777196339f1SStefan Weinhuber struct dasd_ccw_req *cqr; 3778196339f1SStefan Weinhuber int rc; 3779196339f1SStefan Weinhuber struct ccw1 *ccw; 3780196339f1SStefan Weinhuber int useglobal; 3781196339f1SStefan Weinhuber struct dasd_snid_ioctl_data usrparm; 3782196339f1SStefan Weinhuber 3783196339f1SStefan Weinhuber if (!capable(CAP_SYS_ADMIN)) 3784196339f1SStefan Weinhuber return -EACCES; 3785196339f1SStefan Weinhuber 3786196339f1SStefan Weinhuber if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 3787196339f1SStefan Weinhuber return -EFAULT; 3788196339f1SStefan Weinhuber 3789196339f1SStefan Weinhuber useglobal = 0; 3790196339f1SStefan Weinhuber cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 3791196339f1SStefan Weinhuber sizeof(struct dasd_snid_data), device); 3792196339f1SStefan Weinhuber if (IS_ERR(cqr)) { 3793196339f1SStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3794196339f1SStefan Weinhuber useglobal = 1; 3795196339f1SStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3796196339f1SStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3797196339f1SStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3798196339f1SStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3799196339f1SStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3800196339f1SStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3801196339f1SStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 3802196339f1SStefan Weinhuber } 3803196339f1SStefan Weinhuber ccw = cqr->cpaddr; 3804196339f1SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SNID; 3805196339f1SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3806196339f1SStefan Weinhuber ccw->count = 12; 3807196339f1SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 3808196339f1SStefan Weinhuber cqr->startdev = device; 3809196339f1SStefan Weinhuber cqr->memdev = device; 3810196339f1SStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3811196339f1SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 38125a27e60dSStefan Weinhuber set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 3813196339f1SStefan Weinhuber cqr->retries = 5; 3814196339f1SStefan Weinhuber cqr->expires = 10 * HZ; 38151aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 3816196339f1SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 3817196339f1SStefan Weinhuber cqr->lpm = usrparm.path_mask; 3818196339f1SStefan Weinhuber 3819196339f1SStefan Weinhuber rc = dasd_sleep_on_immediatly(cqr); 3820196339f1SStefan Weinhuber /* verify that I/O processing didn't modify the path mask */ 3821196339f1SStefan Weinhuber if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) 3822196339f1SStefan Weinhuber rc = -EIO; 3823196339f1SStefan Weinhuber if (!rc) { 3824196339f1SStefan Weinhuber usrparm.data = *((struct dasd_snid_data *)cqr->data); 3825196339f1SStefan Weinhuber if (copy_to_user(argp, &usrparm, sizeof(usrparm))) 3826196339f1SStefan Weinhuber rc = -EFAULT; 3827196339f1SStefan Weinhuber } 3828196339f1SStefan Weinhuber 3829196339f1SStefan Weinhuber if (useglobal) 3830196339f1SStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3831196339f1SStefan Weinhuber else 3832196339f1SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 3833196339f1SStefan Weinhuber return rc; 3834196339f1SStefan Weinhuber } 3835196339f1SStefan Weinhuber 3836196339f1SStefan Weinhuber /* 38371da177e4SLinus Torvalds * Read performance statistics 38381da177e4SLinus Torvalds */ 38391da177e4SLinus Torvalds static int 38401107ccfbSChristoph Hellwig dasd_eckd_performance(struct dasd_device *device, void __user *argp) 38411da177e4SLinus Torvalds { 38421da177e4SLinus Torvalds struct dasd_psf_prssd_data *prssdp; 38431da177e4SLinus Torvalds struct dasd_rssd_perf_stats_t *stats; 38441da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 38451da177e4SLinus Torvalds struct ccw1 *ccw; 38461da177e4SLinus Torvalds int rc; 38471da177e4SLinus Torvalds 384868b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 38491da177e4SLinus Torvalds (sizeof(struct dasd_psf_prssd_data) + 38501da177e4SLinus Torvalds sizeof(struct dasd_rssd_perf_stats_t)), 38511da177e4SLinus Torvalds device); 38521da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3853fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 38541da177e4SLinus Torvalds "Could not allocate initialization request"); 38551da177e4SLinus Torvalds return PTR_ERR(cqr); 38561da177e4SLinus Torvalds } 38578e09f215SStefan Weinhuber cqr->startdev = device; 38588e09f215SStefan Weinhuber cqr->memdev = device; 38591da177e4SLinus Torvalds cqr->retries = 0; 3860eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 38611da177e4SLinus Torvalds cqr->expires = 10 * HZ; 38621da177e4SLinus Torvalds 38631da177e4SLinus Torvalds /* Prepare for Read Subsystem Data */ 38641da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 38651da177e4SLinus Torvalds memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 38661da177e4SLinus Torvalds prssdp->order = PSF_ORDER_PRSSD; 38675d67d164SJoe Perches prssdp->suborder = 0x01; /* Performance Statistics */ 38681da177e4SLinus Torvalds prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 38691da177e4SLinus Torvalds 38701da177e4SLinus Torvalds ccw = cqr->cpaddr; 38711da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_PSF; 38721da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_psf_prssd_data); 38731da177e4SLinus Torvalds ccw->flags |= CCW_FLAG_CC; 38741da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) prssdp; 38751da177e4SLinus Torvalds 38761da177e4SLinus Torvalds /* Read Subsystem Data - Performance Statistics */ 38771da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 38781da177e4SLinus Torvalds memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 38791da177e4SLinus Torvalds 38801da177e4SLinus Torvalds ccw++; 38811da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_RSSD; 38821da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 38831da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) stats; 38841da177e4SLinus Torvalds 38851aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 38861da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 38871da177e4SLinus Torvalds rc = dasd_sleep_on(cqr); 38881da177e4SLinus Torvalds if (rc == 0) { 38891da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 38901da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 38911107ccfbSChristoph Hellwig if (copy_to_user(argp, stats, 38921107ccfbSChristoph Hellwig sizeof(struct dasd_rssd_perf_stats_t))) 38931107ccfbSChristoph Hellwig rc = -EFAULT; 38941da177e4SLinus Torvalds } 38958e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 38961da177e4SLinus Torvalds return rc; 38971da177e4SLinus Torvalds } 38981da177e4SLinus Torvalds 38991da177e4SLinus Torvalds /* 39001da177e4SLinus Torvalds * Get attributes (cache operations) 39011da177e4SLinus Torvalds * Returnes the cache attributes used in Define Extend (DE). 39021da177e4SLinus Torvalds */ 39031da177e4SLinus Torvalds static int 39041107ccfbSChristoph Hellwig dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 39051da177e4SLinus Torvalds { 39061107ccfbSChristoph Hellwig struct dasd_eckd_private *private = 39071107ccfbSChristoph Hellwig (struct dasd_eckd_private *)device->private; 39081107ccfbSChristoph Hellwig struct attrib_data_t attrib = private->attrib; 39091da177e4SLinus Torvalds int rc; 39101da177e4SLinus Torvalds 39111da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 39121da177e4SLinus Torvalds return -EACCES; 39131107ccfbSChristoph Hellwig if (!argp) 39141da177e4SLinus Torvalds return -EINVAL; 39151da177e4SLinus Torvalds 39161107ccfbSChristoph Hellwig rc = 0; 39171107ccfbSChristoph Hellwig if (copy_to_user(argp, (long *) &attrib, 39181107ccfbSChristoph Hellwig sizeof(struct attrib_data_t))) 39191107ccfbSChristoph Hellwig rc = -EFAULT; 39201da177e4SLinus Torvalds 39211da177e4SLinus Torvalds return rc; 39221da177e4SLinus Torvalds } 39231da177e4SLinus Torvalds 39241da177e4SLinus Torvalds /* 39251da177e4SLinus Torvalds * Set attributes (cache operations) 39261da177e4SLinus Torvalds * Stores the attributes for cache operation to be used in Define Extend (DE). 39271da177e4SLinus Torvalds */ 39281da177e4SLinus Torvalds static int 39291107ccfbSChristoph Hellwig dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 39301da177e4SLinus Torvalds { 39311107ccfbSChristoph Hellwig struct dasd_eckd_private *private = 39321107ccfbSChristoph Hellwig (struct dasd_eckd_private *)device->private; 39331da177e4SLinus Torvalds struct attrib_data_t attrib; 39341da177e4SLinus Torvalds 39351da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 39361da177e4SLinus Torvalds return -EACCES; 39371107ccfbSChristoph Hellwig if (!argp) 39381da177e4SLinus Torvalds return -EINVAL; 39391da177e4SLinus Torvalds 39401107ccfbSChristoph Hellwig if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 39411da177e4SLinus Torvalds return -EFAULT; 39421da177e4SLinus Torvalds private->attrib = attrib; 39431da177e4SLinus Torvalds 3944fc19f381SStefan Haberland dev_info(&device->cdev->dev, 3945fc19f381SStefan Haberland "The DASD cache mode was set to %x (%i cylinder prestage)\n", 39461da177e4SLinus Torvalds private->attrib.operation, private->attrib.nr_cyl); 39471da177e4SLinus Torvalds return 0; 39481da177e4SLinus Torvalds } 39491da177e4SLinus Torvalds 3950ab1d848fSNigel Hislop /* 3951ab1d848fSNigel Hislop * Issue syscall I/O to EMC Symmetrix array. 3952ab1d848fSNigel Hislop * CCWs are PSF and RSSD 3953ab1d848fSNigel Hislop */ 3954ab1d848fSNigel Hislop static int dasd_symm_io(struct dasd_device *device, void __user *argp) 3955ab1d848fSNigel Hislop { 3956ab1d848fSNigel Hislop struct dasd_symmio_parms usrparm; 3957ab1d848fSNigel Hislop char *psf_data, *rssd_result; 3958ab1d848fSNigel Hislop struct dasd_ccw_req *cqr; 3959ab1d848fSNigel Hislop struct ccw1 *ccw; 396052898025SNigel Hislop char psf0, psf1; 3961ab1d848fSNigel Hislop int rc; 3962ab1d848fSNigel Hislop 396352898025SNigel Hislop if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) 396452898025SNigel Hislop return -EACCES; 396552898025SNigel Hislop psf0 = psf1 = 0; 396652898025SNigel Hislop 3967ab1d848fSNigel Hislop /* Copy parms from caller */ 3968ab1d848fSNigel Hislop rc = -EFAULT; 3969ab1d848fSNigel Hislop if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 3970ab1d848fSNigel Hislop goto out; 3971f8b06859SHeiko Carstens if (is_compat_task() || sizeof(long) == 4) { 3972ab1d848fSNigel Hislop /* Make sure pointers are sane even on 31 bit. */ 3973ab1d848fSNigel Hislop rc = -EINVAL; 3974f8b06859SHeiko Carstens if ((usrparm.psf_data >> 32) != 0) 3975ab1d848fSNigel Hislop goto out; 3976f8b06859SHeiko Carstens if ((usrparm.rssd_result >> 32) != 0) 3977f8b06859SHeiko Carstens goto out; 3978f8b06859SHeiko Carstens usrparm.psf_data &= 0x7fffffffULL; 3979f8b06859SHeiko Carstens usrparm.rssd_result &= 0x7fffffffULL; 3980ab1d848fSNigel Hislop } 3981ab1d848fSNigel Hislop /* alloc I/O data area */ 3982ab1d848fSNigel Hislop psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 3983ab1d848fSNigel Hislop rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 3984ab1d848fSNigel Hislop if (!psf_data || !rssd_result) { 3985ab1d848fSNigel Hislop rc = -ENOMEM; 3986ab1d848fSNigel Hislop goto out_free; 3987ab1d848fSNigel Hislop } 3988ab1d848fSNigel Hislop 3989ab1d848fSNigel Hislop /* get syscall header from user space */ 3990ab1d848fSNigel Hislop rc = -EFAULT; 3991ab1d848fSNigel Hislop if (copy_from_user(psf_data, 3992ab1d848fSNigel Hislop (void __user *)(unsigned long) usrparm.psf_data, 3993ab1d848fSNigel Hislop usrparm.psf_data_len)) 3994ab1d848fSNigel Hislop goto out_free; 399552898025SNigel Hislop psf0 = psf_data[0]; 399652898025SNigel Hislop psf1 = psf_data[1]; 3997ab1d848fSNigel Hislop 3998ab1d848fSNigel Hislop /* setup CCWs for PSF + RSSD */ 399968b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device); 4000ab1d848fSNigel Hislop if (IS_ERR(cqr)) { 4001fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 4002ab1d848fSNigel Hislop "Could not allocate initialization request"); 4003ab1d848fSNigel Hislop rc = PTR_ERR(cqr); 4004ab1d848fSNigel Hislop goto out_free; 4005ab1d848fSNigel Hislop } 4006ab1d848fSNigel Hislop 4007ab1d848fSNigel Hislop cqr->startdev = device; 4008ab1d848fSNigel Hislop cqr->memdev = device; 4009ab1d848fSNigel Hislop cqr->retries = 3; 4010ab1d848fSNigel Hislop cqr->expires = 10 * HZ; 40111aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 4012ab1d848fSNigel Hislop cqr->status = DASD_CQR_FILLED; 4013ab1d848fSNigel Hislop 4014ab1d848fSNigel Hislop /* Build the ccws */ 4015ab1d848fSNigel Hislop ccw = cqr->cpaddr; 4016ab1d848fSNigel Hislop 4017ab1d848fSNigel Hislop /* PSF ccw */ 4018ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_PSF; 4019ab1d848fSNigel Hislop ccw->count = usrparm.psf_data_len; 4020ab1d848fSNigel Hislop ccw->flags |= CCW_FLAG_CC; 4021ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) psf_data; 4022ab1d848fSNigel Hislop 4023ab1d848fSNigel Hislop ccw++; 4024ab1d848fSNigel Hislop 4025ab1d848fSNigel Hislop /* RSSD ccw */ 4026ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_RSSD; 4027ab1d848fSNigel Hislop ccw->count = usrparm.rssd_result_len; 4028ab1d848fSNigel Hislop ccw->flags = CCW_FLAG_SLI ; 4029ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) rssd_result; 4030ab1d848fSNigel Hislop 4031ab1d848fSNigel Hislop rc = dasd_sleep_on(cqr); 4032ab1d848fSNigel Hislop if (rc) 4033ab1d848fSNigel Hislop goto out_sfree; 4034ab1d848fSNigel Hislop 4035ab1d848fSNigel Hislop rc = -EFAULT; 4036ab1d848fSNigel Hislop if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 4037ab1d848fSNigel Hislop rssd_result, usrparm.rssd_result_len)) 4038ab1d848fSNigel Hislop goto out_sfree; 4039ab1d848fSNigel Hislop rc = 0; 4040ab1d848fSNigel Hislop 4041ab1d848fSNigel Hislop out_sfree: 4042ab1d848fSNigel Hislop dasd_sfree_request(cqr, cqr->memdev); 4043ab1d848fSNigel Hislop out_free: 4044ab1d848fSNigel Hislop kfree(rssd_result); 4045ab1d848fSNigel Hislop kfree(psf_data); 4046ab1d848fSNigel Hislop out: 404752898025SNigel Hislop DBF_DEV_EVENT(DBF_WARNING, device, 404852898025SNigel Hislop "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", 404952898025SNigel Hislop (int) psf0, (int) psf1, rc); 4050ab1d848fSNigel Hislop return rc; 4051ab1d848fSNigel Hislop } 4052ab1d848fSNigel Hislop 40531107ccfbSChristoph Hellwig static int 40548e09f215SStefan Weinhuber dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 40551107ccfbSChristoph Hellwig { 40568e09f215SStefan Weinhuber struct dasd_device *device = block->base; 40578e09f215SStefan Weinhuber 40581107ccfbSChristoph Hellwig switch (cmd) { 40591107ccfbSChristoph Hellwig case BIODASDGATTR: 40601107ccfbSChristoph Hellwig return dasd_eckd_get_attrib(device, argp); 40611107ccfbSChristoph Hellwig case BIODASDSATTR: 40621107ccfbSChristoph Hellwig return dasd_eckd_set_attrib(device, argp); 40631107ccfbSChristoph Hellwig case BIODASDPSRD: 40641107ccfbSChristoph Hellwig return dasd_eckd_performance(device, argp); 40651107ccfbSChristoph Hellwig case BIODASDRLSE: 40661107ccfbSChristoph Hellwig return dasd_eckd_release(device); 40671107ccfbSChristoph Hellwig case BIODASDRSRV: 40681107ccfbSChristoph Hellwig return dasd_eckd_reserve(device); 40691107ccfbSChristoph Hellwig case BIODASDSLCK: 40701107ccfbSChristoph Hellwig return dasd_eckd_steal_lock(device); 4071196339f1SStefan Weinhuber case BIODASDSNID: 4072196339f1SStefan Weinhuber return dasd_eckd_snid(device, argp); 4073ab1d848fSNigel Hislop case BIODASDSYMMIO: 4074ab1d848fSNigel Hislop return dasd_symm_io(device, argp); 40751107ccfbSChristoph Hellwig default: 40766b79d14eSHeiko Carstens return -ENOTTY; 40771107ccfbSChristoph Hellwig } 40781107ccfbSChristoph Hellwig } 40791107ccfbSChristoph Hellwig 40801da177e4SLinus Torvalds /* 4081445b5b49SHorst Hummel * Dump the range of CCWs into 'page' buffer 4082445b5b49SHorst Hummel * and return number of printed chars. 4083445b5b49SHorst Hummel */ 40844d284cacSHeiko Carstens static int 4085445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 4086445b5b49SHorst Hummel { 4087445b5b49SHorst Hummel int len, count; 4088445b5b49SHorst Hummel char *datap; 4089445b5b49SHorst Hummel 4090445b5b49SHorst Hummel len = 0; 4091445b5b49SHorst Hummel while (from <= to) { 4092773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4093445b5b49SHorst Hummel " CCW %p: %08X %08X DAT:", 4094445b5b49SHorst Hummel from, ((int *) from)[0], ((int *) from)[1]); 4095445b5b49SHorst Hummel 4096445b5b49SHorst Hummel /* get pointer to data (consider IDALs) */ 4097445b5b49SHorst Hummel if (from->flags & CCW_FLAG_IDA) 4098445b5b49SHorst Hummel datap = (char *) *((addr_t *) (addr_t) from->cda); 4099445b5b49SHorst Hummel else 4100445b5b49SHorst Hummel datap = (char *) ((addr_t) from->cda); 4101445b5b49SHorst Hummel 4102445b5b49SHorst Hummel /* dump data (max 32 bytes) */ 4103445b5b49SHorst Hummel for (count = 0; count < from->count && count < 32; count++) { 4104445b5b49SHorst Hummel if (count % 8 == 0) len += sprintf(page + len, " "); 4105445b5b49SHorst Hummel if (count % 4 == 0) len += sprintf(page + len, " "); 4106445b5b49SHorst Hummel len += sprintf(page + len, "%02x", datap[count]); 4107445b5b49SHorst Hummel } 4108445b5b49SHorst Hummel len += sprintf(page + len, "\n"); 4109445b5b49SHorst Hummel from++; 4110445b5b49SHorst Hummel } 4111445b5b49SHorst Hummel return len; 4112445b5b49SHorst Hummel } 4113445b5b49SHorst Hummel 4114fc19f381SStefan Haberland static void 4115aeec92caSStefan Haberland dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 4116aeec92caSStefan Haberland char *reason) 4117fc19f381SStefan Haberland { 4118fc19f381SStefan Haberland u64 *sense; 4119a5a0061fSStefan Weinhuber u64 *stat; 4120fc19f381SStefan Haberland 4121aeec92caSStefan Haberland sense = (u64 *) dasd_get_sense(irb); 4122a5a0061fSStefan Weinhuber stat = (u64 *) &irb->scsw; 4123fc19f381SStefan Haberland if (sense) { 4124a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " 4125a5a0061fSStefan Weinhuber "%016llx %016llx %016llx %016llx", 4126a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 4127ed3640b2SStefan Haberland sense[0], sense[1], sense[2], sense[3]); 4128fc19f381SStefan Haberland } else { 4129a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", 4130a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 4131a5a0061fSStefan Weinhuber "NO VALID SENSE"); 4132fc19f381SStefan Haberland } 4133fc19f381SStefan Haberland } 4134fc19f381SStefan Haberland 4135445b5b49SHorst Hummel /* 41361da177e4SLinus Torvalds * Print sense data and related channel program. 41371da177e4SLinus Torvalds * Parts are printed because printk buffer is only 1024 bytes. 41381da177e4SLinus Torvalds */ 4139f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 41408e09f215SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 41411da177e4SLinus Torvalds { 41421da177e4SLinus Torvalds char *page; 4143445b5b49SHorst Hummel struct ccw1 *first, *last, *fail, *from, *to; 4144445b5b49SHorst Hummel int len, sl, sct; 41451da177e4SLinus Torvalds 41461da177e4SLinus Torvalds page = (char *) get_zeroed_page(GFP_ATOMIC); 41471da177e4SLinus Torvalds if (page == NULL) { 4148fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 4149fc19f381SStefan Haberland "No memory to dump sense data\n"); 41501da177e4SLinus Torvalds return; 41511da177e4SLinus Torvalds } 4152445b5b49SHorst Hummel /* dump the sense data */ 4153773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 41541da177e4SLinus Torvalds " I/O status report for device %s:\n", 41552a0217d5SKay Sievers dev_name(&device->cdev->dev)); 4156773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4157a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 4158a5a0061fSStefan Weinhuber "CS:%02X RC:%d\n", 4159a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 4160a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 4161a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 4162a5a0061fSStefan Weinhuber req ? req->intrc : 0); 4163773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 41641da177e4SLinus Torvalds " device %s: Failing CCW: %p\n", 41652a0217d5SKay Sievers dev_name(&device->cdev->dev), 416623d805b6SPeter Oberparleiter (void *) (addr_t) irb->scsw.cmd.cpa); 41671da177e4SLinus Torvalds if (irb->esw.esw0.erw.cons) { 41681da177e4SLinus Torvalds for (sl = 0; sl < 4; sl++) { 4169773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 41701da177e4SLinus Torvalds " Sense(hex) %2d-%2d:", 41711da177e4SLinus Torvalds (8 * sl), ((8 * sl) + 7)); 41721da177e4SLinus Torvalds 41731da177e4SLinus Torvalds for (sct = 0; sct < 8; sct++) { 41741da177e4SLinus Torvalds len += sprintf(page + len, " %02x", 41751da177e4SLinus Torvalds irb->ecw[8 * sl + sct]); 41761da177e4SLinus Torvalds } 41771da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 41781da177e4SLinus Torvalds } 41791da177e4SLinus Torvalds 41801da177e4SLinus Torvalds if (irb->ecw[27] & DASD_SENSE_BIT_0) { 41811da177e4SLinus Torvalds /* 24 Byte Sense Data */ 4182773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 41831da177e4SLinus Torvalds " 24 Byte: %x MSG %x, " 41841da177e4SLinus Torvalds "%s MSGb to SYSOP\n", 41851da177e4SLinus Torvalds irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 41861da177e4SLinus Torvalds irb->ecw[1] & 0x10 ? "" : "no"); 41871da177e4SLinus Torvalds } else { 41881da177e4SLinus Torvalds /* 32 Byte Sense Data */ 4189773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 41901da177e4SLinus Torvalds " 32 Byte: Format: %x " 41911da177e4SLinus Torvalds "Exception class %x\n", 41921da177e4SLinus Torvalds irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 41931da177e4SLinus Torvalds } 41941da177e4SLinus Torvalds } else { 4195773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 41961da177e4SLinus Torvalds " SORRY - NO VALID SENSE AVAILABLE\n"); 41971da177e4SLinus Torvalds } 4198773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 41991da177e4SLinus Torvalds 42008e09f215SStefan Weinhuber if (req) { 42018e09f215SStefan Weinhuber /* req == NULL for unsolicited interrupts */ 4202445b5b49SHorst Hummel /* dump the Channel Program (max 140 Bytes per line) */ 4203445b5b49SHorst Hummel /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 4204445b5b49SHorst Hummel first = req->cpaddr; 4205445b5b49SHorst Hummel for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 4206445b5b49SHorst Hummel to = min(first + 6, last); 4207773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 42081da177e4SLinus Torvalds " Related CP in req: %p\n", req); 4209445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(first, to, page + len); 4210773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 42111da177e4SLinus Torvalds 4212445b5b49SHorst Hummel /* print failing CCW area (maximum 4) */ 4213445b5b49SHorst Hummel /* scsw->cda is either valid or zero */ 42141da177e4SLinus Torvalds len = 0; 4215445b5b49SHorst Hummel from = ++to; 421623d805b6SPeter Oberparleiter fail = (struct ccw1 *)(addr_t) 421723d805b6SPeter Oberparleiter irb->scsw.cmd.cpa; /* failing CCW */ 4218445b5b49SHorst Hummel if (from < fail - 2) { 4219445b5b49SHorst Hummel from = fail - 2; /* there is a gap - print header */ 4220773bab4aSSebastian Ott len += sprintf(page, PRINTK_HEADER "......\n"); 42211da177e4SLinus Torvalds } 4222445b5b49SHorst Hummel to = min(fail + 1, last); 4223445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, to, page + len); 42241da177e4SLinus Torvalds 4225445b5b49SHorst Hummel /* print last CCWs (maximum 2) */ 4226445b5b49SHorst Hummel from = max(from, ++to); 4227445b5b49SHorst Hummel if (from < last - 1) { 4228445b5b49SHorst Hummel from = last - 1; /* there is a gap - print header */ 4229773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER "......\n"); 42301da177e4SLinus Torvalds } 4231445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, last, page + len); 42321da177e4SLinus Torvalds if (len > 0) 4233773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 42348e09f215SStefan Weinhuber } 42351da177e4SLinus Torvalds free_page((unsigned long) page); 42361da177e4SLinus Torvalds } 42371da177e4SLinus Torvalds 4238f3eb5384SStefan Weinhuber 4239f3eb5384SStefan Weinhuber /* 4240f3eb5384SStefan Weinhuber * Print sense data from a tcw. 4241f3eb5384SStefan Weinhuber */ 4242f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 4243f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 4244f3eb5384SStefan Weinhuber { 4245f3eb5384SStefan Weinhuber char *page; 4246f3eb5384SStefan Weinhuber int len, sl, sct, residual; 4247f3eb5384SStefan Weinhuber struct tsb *tsb; 4248ef19298bSStefan Weinhuber u8 *sense, *rcq; 4249f3eb5384SStefan Weinhuber 4250f3eb5384SStefan Weinhuber page = (char *) get_zeroed_page(GFP_ATOMIC); 4251f3eb5384SStefan Weinhuber if (page == NULL) { 4252fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, " %s", 4253f3eb5384SStefan Weinhuber "No memory to dump sense data"); 4254f3eb5384SStefan Weinhuber return; 4255f3eb5384SStefan Weinhuber } 4256f3eb5384SStefan Weinhuber /* dump the sense data */ 4257773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 4258f3eb5384SStefan Weinhuber " I/O status report for device %s:\n", 4259f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev)); 4260773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4261a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 4262a5a0061fSStefan Weinhuber "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", 4263a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 4264a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 4265a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 4266a5a0061fSStefan Weinhuber irb->scsw.tm.fcxs, irb->scsw.tm.schxs, 4267a5a0061fSStefan Weinhuber req ? req->intrc : 0); 4268773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4269f3eb5384SStefan Weinhuber " device %s: Failing TCW: %p\n", 4270f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev), 4271f3eb5384SStefan Weinhuber (void *) (addr_t) irb->scsw.tm.tcw); 4272f3eb5384SStefan Weinhuber 4273f3eb5384SStefan Weinhuber tsb = NULL; 4274f3eb5384SStefan Weinhuber sense = NULL; 4275a5a0061fSStefan Weinhuber if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) 4276f3eb5384SStefan Weinhuber tsb = tcw_get_tsb( 4277f3eb5384SStefan Weinhuber (struct tcw *)(unsigned long)irb->scsw.tm.tcw); 4278f3eb5384SStefan Weinhuber 4279b8fde722SStefan Haberland if (tsb) { 4280773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4281f3eb5384SStefan Weinhuber " tsb->length %d\n", tsb->length); 4282773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4283f3eb5384SStefan Weinhuber " tsb->flags %x\n", tsb->flags); 4284773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4285f3eb5384SStefan Weinhuber " tsb->dcw_offset %d\n", tsb->dcw_offset); 4286773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4287f3eb5384SStefan Weinhuber " tsb->count %d\n", tsb->count); 4288f3eb5384SStefan Weinhuber residual = tsb->count - 28; 4289773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4290f3eb5384SStefan Weinhuber " residual %d\n", residual); 4291f3eb5384SStefan Weinhuber 4292f3eb5384SStefan Weinhuber switch (tsb->flags & 0x07) { 4293f3eb5384SStefan Weinhuber case 1: /* tsa_iostat */ 4294773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4295f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_time %d\n", 4296f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_time); 4297773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4298f3eb5384SStefan Weinhuber " tsb->tsa.iostat.def_time %d\n", 4299f3eb5384SStefan Weinhuber tsb->tsa.iostat.def_time); 4300773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4301f3eb5384SStefan Weinhuber " tsb->tsa.iostat.queue_time %d\n", 4302f3eb5384SStefan Weinhuber tsb->tsa.iostat.queue_time); 4303773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4304f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_busy_time %d\n", 4305f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_busy_time); 4306773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4307f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_act_time %d\n", 4308f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_act_time); 4309f3eb5384SStefan Weinhuber sense = tsb->tsa.iostat.sense; 4310f3eb5384SStefan Weinhuber break; 4311f3eb5384SStefan Weinhuber case 2: /* ts_ddpc */ 4312773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4313f3eb5384SStefan Weinhuber " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); 4314ef19298bSStefan Weinhuber for (sl = 0; sl < 2; sl++) { 4315773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4316ef19298bSStefan Weinhuber " tsb->tsa.ddpc.rcq %2d-%2d: ", 4317ef19298bSStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 4318ef19298bSStefan Weinhuber rcq = tsb->tsa.ddpc.rcq; 4319f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 4320f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 4321ef19298bSStefan Weinhuber rcq[8 * sl + sct]); 4322f3eb5384SStefan Weinhuber } 4323f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 4324f3eb5384SStefan Weinhuber } 4325f3eb5384SStefan Weinhuber sense = tsb->tsa.ddpc.sense; 4326f3eb5384SStefan Weinhuber break; 4327f3eb5384SStefan Weinhuber case 3: /* tsa_intrg */ 4328773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4329f3eb5384SStefan Weinhuber " tsb->tsa.intrg.: not supportet yet\n"); 4330f3eb5384SStefan Weinhuber break; 4331f3eb5384SStefan Weinhuber } 4332f3eb5384SStefan Weinhuber 4333f3eb5384SStefan Weinhuber if (sense) { 4334f3eb5384SStefan Weinhuber for (sl = 0; sl < 4; sl++) { 4335773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4336f3eb5384SStefan Weinhuber " Sense(hex) %2d-%2d:", 4337f3eb5384SStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 4338f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 4339f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 4340f3eb5384SStefan Weinhuber sense[8 * sl + sct]); 4341f3eb5384SStefan Weinhuber } 4342f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 4343f3eb5384SStefan Weinhuber } 4344f3eb5384SStefan Weinhuber 4345f3eb5384SStefan Weinhuber if (sense[27] & DASD_SENSE_BIT_0) { 4346f3eb5384SStefan Weinhuber /* 24 Byte Sense Data */ 4347773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4348f3eb5384SStefan Weinhuber " 24 Byte: %x MSG %x, " 4349f3eb5384SStefan Weinhuber "%s MSGb to SYSOP\n", 4350f3eb5384SStefan Weinhuber sense[7] >> 4, sense[7] & 0x0f, 4351f3eb5384SStefan Weinhuber sense[1] & 0x10 ? "" : "no"); 4352f3eb5384SStefan Weinhuber } else { 4353f3eb5384SStefan Weinhuber /* 32 Byte Sense Data */ 4354773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4355f3eb5384SStefan Weinhuber " 32 Byte: Format: %x " 4356f3eb5384SStefan Weinhuber "Exception class %x\n", 4357f3eb5384SStefan Weinhuber sense[6] & 0x0f, sense[22] >> 4); 4358f3eb5384SStefan Weinhuber } 4359f3eb5384SStefan Weinhuber } else { 4360773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4361f3eb5384SStefan Weinhuber " SORRY - NO VALID SENSE AVAILABLE\n"); 4362f3eb5384SStefan Weinhuber } 4363f3eb5384SStefan Weinhuber } else { 4364773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4365f3eb5384SStefan Weinhuber " SORRY - NO TSB DATA AVAILABLE\n"); 4366f3eb5384SStefan Weinhuber } 4367773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 4368f3eb5384SStefan Weinhuber free_page((unsigned long) page); 4369f3eb5384SStefan Weinhuber } 4370f3eb5384SStefan Weinhuber 4371f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense(struct dasd_device *device, 4372f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 4373f3eb5384SStefan Weinhuber { 4374a5a0061fSStefan Weinhuber if (scsw_is_tm(&irb->scsw)) 4375f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_tcw(device, req, irb); 4376f3eb5384SStefan Weinhuber else 4377f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_ccw(device, req, irb); 4378f3eb5384SStefan Weinhuber } 4379f3eb5384SStefan Weinhuber 4380501183f2SStefan Haberland static int dasd_eckd_pm_freeze(struct dasd_device *device) 4381d41dd122SStefan Haberland { 4382d41dd122SStefan Haberland /* 4383d41dd122SStefan Haberland * the device should be disconnected from our LCU structure 4384d41dd122SStefan Haberland * on restore we will reconnect it and reread LCU specific 4385d41dd122SStefan Haberland * information like PAV support that might have changed 4386d41dd122SStefan Haberland */ 4387d41dd122SStefan Haberland dasd_alias_remove_device(device); 4388d41dd122SStefan Haberland dasd_alias_disconnect_device_from_lcu(device); 4389d41dd122SStefan Haberland 4390d41dd122SStefan Haberland return 0; 4391d41dd122SStefan Haberland } 4392d41dd122SStefan Haberland 4393501183f2SStefan Haberland static int dasd_eckd_restore_device(struct dasd_device *device) 4394d41dd122SStefan Haberland { 4395d41dd122SStefan Haberland struct dasd_eckd_private *private; 43966fca97a9SStefan Haberland struct dasd_eckd_characteristics temp_rdc_data; 4397f9f8d02fSStefan Haberland int rc; 4398d41dd122SStefan Haberland struct dasd_uid temp_uid; 4399a7602f6cSStefan Haberland unsigned long flags; 4400ea4da6eaSStefan Haberland unsigned long cqr_flags = 0; 4401d41dd122SStefan Haberland 4402d41dd122SStefan Haberland private = (struct dasd_eckd_private *) device->private; 4403d41dd122SStefan Haberland 4404d41dd122SStefan Haberland /* Read Configuration Data */ 440555d3a85cSStefan Haberland dasd_eckd_read_conf(device); 4406d41dd122SStefan Haberland 44072dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 44082dedf0d9SStefan Haberland /* Generate device unique id */ 44092dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 44102dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4411d41dd122SStefan Haberland if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) 4412a7602f6cSStefan Haberland dev_err(&device->cdev->dev, "The UID of the DASD has " 4413a7602f6cSStefan Haberland "changed\n"); 44142dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4415d41dd122SStefan Haberland if (rc) 4416d41dd122SStefan Haberland goto out_err; 4417d41dd122SStefan Haberland 4418d41dd122SStefan Haberland /* register lcu with alias handling, enable PAV if this is a new lcu */ 4419f9f8d02fSStefan Haberland rc = dasd_alias_make_device_known_to_lcu(device); 4420f9f8d02fSStefan Haberland if (rc) 4421f9f8d02fSStefan Haberland return rc; 4422ea4da6eaSStefan Haberland 4423ea4da6eaSStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr_flags); 4424ea4da6eaSStefan Haberland dasd_eckd_validate_server(device, cqr_flags); 4425f4ac1d02SStefan Weinhuber 4426f4ac1d02SStefan Weinhuber /* RE-Read Configuration Data */ 442755d3a85cSStefan Haberland dasd_eckd_read_conf(device); 4428d41dd122SStefan Haberland 4429d41dd122SStefan Haberland /* Read Feature Codes */ 443068d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 4431d41dd122SStefan Haberland 4432d41dd122SStefan Haberland /* Read Device Characteristics */ 443368b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 44346fca97a9SStefan Haberland &temp_rdc_data, 64); 4435d41dd122SStefan Haberland if (rc) { 4436b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 4437b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 4438d41dd122SStefan Haberland goto out_err; 4439d41dd122SStefan Haberland } 4440a7602f6cSStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 44416fca97a9SStefan Haberland memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data)); 4442a7602f6cSStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4443d41dd122SStefan Haberland 4444d41dd122SStefan Haberland /* add device to alias management */ 4445d41dd122SStefan Haberland dasd_alias_add_device(device); 4446d41dd122SStefan Haberland 4447d41dd122SStefan Haberland return 0; 4448d41dd122SStefan Haberland 4449d41dd122SStefan Haberland out_err: 4450e6125fbaSStefan Haberland return -1; 4451d41dd122SStefan Haberland } 4452d41dd122SStefan Haberland 4453501183f2SStefan Haberland static int dasd_eckd_reload_device(struct dasd_device *device) 4454501183f2SStefan Haberland { 4455501183f2SStefan Haberland struct dasd_eckd_private *private; 4456501183f2SStefan Haberland int rc, old_base; 44572dedf0d9SStefan Haberland char print_uid[60]; 44582dedf0d9SStefan Haberland struct dasd_uid uid; 44592dedf0d9SStefan Haberland unsigned long flags; 4460501183f2SStefan Haberland 4461501183f2SStefan Haberland private = (struct dasd_eckd_private *) device->private; 44622dedf0d9SStefan Haberland 44632dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4464501183f2SStefan Haberland old_base = private->uid.base_unit_addr; 44652dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 44662dedf0d9SStefan Haberland 4467501183f2SStefan Haberland /* Read Configuration Data */ 4468501183f2SStefan Haberland rc = dasd_eckd_read_conf(device); 4469501183f2SStefan Haberland if (rc) 4470501183f2SStefan Haberland goto out_err; 4471501183f2SStefan Haberland 44722dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 4473501183f2SStefan Haberland if (rc) 4474501183f2SStefan Haberland goto out_err; 4475501183f2SStefan Haberland /* 4476501183f2SStefan Haberland * update unit address configuration and 4477501183f2SStefan Haberland * add device to alias management 4478501183f2SStefan Haberland */ 4479501183f2SStefan Haberland dasd_alias_update_add_device(device); 4480501183f2SStefan Haberland 44812dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &uid); 44822dedf0d9SStefan Haberland 44832dedf0d9SStefan Haberland if (old_base != uid.base_unit_addr) { 44842dedf0d9SStefan Haberland if (strlen(uid.vduit) > 0) 44852dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 44862dedf0d9SStefan Haberland "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial, 44872dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr, uid.vduit); 4488501183f2SStefan Haberland else 44892dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 44902dedf0d9SStefan Haberland "%s.%s.%04x.%02x", uid.vendor, uid.serial, 44912dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr); 4492501183f2SStefan Haberland 4493501183f2SStefan Haberland dev_info(&device->cdev->dev, 4494501183f2SStefan Haberland "An Alias device was reassigned to a new base device " 44952dedf0d9SStefan Haberland "with UID: %s\n", print_uid); 4496501183f2SStefan Haberland } 4497501183f2SStefan Haberland return 0; 4498501183f2SStefan Haberland 4499501183f2SStefan Haberland out_err: 4500501183f2SStefan Haberland return -1; 4501501183f2SStefan Haberland } 4502501183f2SStefan Haberland 45035db8440cSStefan Haberland static int dasd_eckd_read_message_buffer(struct dasd_device *device, 45045db8440cSStefan Haberland struct dasd_rssd_messages *messages, 45055db8440cSStefan Haberland __u8 lpum) 45065db8440cSStefan Haberland { 45075db8440cSStefan Haberland struct dasd_rssd_messages *message_buf; 45085db8440cSStefan Haberland struct dasd_psf_prssd_data *prssdp; 45095db8440cSStefan Haberland struct dasd_eckd_private *private; 45105db8440cSStefan Haberland struct dasd_ccw_req *cqr; 45115db8440cSStefan Haberland struct ccw1 *ccw; 45125db8440cSStefan Haberland int rc; 45135db8440cSStefan Haberland 45145db8440cSStefan Haberland private = (struct dasd_eckd_private *) device->private; 45155db8440cSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 45165db8440cSStefan Haberland (sizeof(struct dasd_psf_prssd_data) + 45175db8440cSStefan Haberland sizeof(struct dasd_rssd_messages)), 45185db8440cSStefan Haberland device); 45195db8440cSStefan Haberland if (IS_ERR(cqr)) { 45205db8440cSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 45215db8440cSStefan Haberland "Could not allocate read message buffer request"); 45225db8440cSStefan Haberland return PTR_ERR(cqr); 45235db8440cSStefan Haberland } 45245db8440cSStefan Haberland 45255db8440cSStefan Haberland cqr->startdev = device; 45265db8440cSStefan Haberland cqr->memdev = device; 45275db8440cSStefan Haberland cqr->block = NULL; 45285db8440cSStefan Haberland cqr->retries = 256; 45295db8440cSStefan Haberland cqr->expires = 10 * HZ; 45305db8440cSStefan Haberland 45315db8440cSStefan Haberland /* we need to check for messages on exactly this path */ 45325db8440cSStefan Haberland set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 45335db8440cSStefan Haberland cqr->lpm = lpum; 45345db8440cSStefan Haberland 45355db8440cSStefan Haberland /* Prepare for Read Subsystem Data */ 45365db8440cSStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 45375db8440cSStefan Haberland memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 45385db8440cSStefan Haberland prssdp->order = PSF_ORDER_PRSSD; 45395db8440cSStefan Haberland prssdp->suborder = 0x03; /* Message Buffer */ 45405db8440cSStefan Haberland /* all other bytes of prssdp must be zero */ 45415db8440cSStefan Haberland 45425db8440cSStefan Haberland ccw = cqr->cpaddr; 45435db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 45445db8440cSStefan Haberland ccw->count = sizeof(struct dasd_psf_prssd_data); 45455db8440cSStefan Haberland ccw->flags |= CCW_FLAG_CC; 45465db8440cSStefan Haberland ccw->flags |= CCW_FLAG_SLI; 45475db8440cSStefan Haberland ccw->cda = (__u32)(addr_t) prssdp; 45485db8440cSStefan Haberland 45495db8440cSStefan Haberland /* Read Subsystem Data - message buffer */ 45505db8440cSStefan Haberland message_buf = (struct dasd_rssd_messages *) (prssdp + 1); 45515db8440cSStefan Haberland memset(message_buf, 0, sizeof(struct dasd_rssd_messages)); 45525db8440cSStefan Haberland 45535db8440cSStefan Haberland ccw++; 45545db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_RSSD; 45555db8440cSStefan Haberland ccw->count = sizeof(struct dasd_rssd_messages); 45565db8440cSStefan Haberland ccw->flags |= CCW_FLAG_SLI; 45575db8440cSStefan Haberland ccw->cda = (__u32)(addr_t) message_buf; 45585db8440cSStefan Haberland 45595db8440cSStefan Haberland cqr->buildclk = get_tod_clock(); 45605db8440cSStefan Haberland cqr->status = DASD_CQR_FILLED; 45615db8440cSStefan Haberland rc = dasd_sleep_on_immediatly(cqr); 45625db8440cSStefan Haberland if (rc == 0) { 45635db8440cSStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 45645db8440cSStefan Haberland message_buf = (struct dasd_rssd_messages *) 45655db8440cSStefan Haberland (prssdp + 1); 45665db8440cSStefan Haberland memcpy(messages, message_buf, 45675db8440cSStefan Haberland sizeof(struct dasd_rssd_messages)); 45685db8440cSStefan Haberland } else 45695db8440cSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 45705db8440cSStefan Haberland "Reading messages failed with rc=%d\n" 45715db8440cSStefan Haberland , rc); 45725db8440cSStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 45735db8440cSStefan Haberland return rc; 45745db8440cSStefan Haberland } 45755db8440cSStefan Haberland 45765db8440cSStefan Haberland /* 45775db8440cSStefan Haberland * Perform Subsystem Function - CUIR response 45785db8440cSStefan Haberland */ 45795db8440cSStefan Haberland static int 45805db8440cSStefan Haberland dasd_eckd_psf_cuir_response(struct dasd_device *device, int response, 45815db8440cSStefan Haberland __u32 message_id, 45825db8440cSStefan Haberland struct channel_path_desc *desc, 45835db8440cSStefan Haberland struct subchannel_id sch_id) 45845db8440cSStefan Haberland { 45855db8440cSStefan Haberland struct dasd_psf_cuir_response *psf_cuir; 45865db8440cSStefan Haberland struct dasd_ccw_req *cqr; 45875db8440cSStefan Haberland struct ccw1 *ccw; 45885db8440cSStefan Haberland int rc; 45895db8440cSStefan Haberland 45905db8440cSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 45915db8440cSStefan Haberland sizeof(struct dasd_psf_cuir_response), 45925db8440cSStefan Haberland device); 45935db8440cSStefan Haberland 45945db8440cSStefan Haberland if (IS_ERR(cqr)) { 45955db8440cSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 45965db8440cSStefan Haberland "Could not allocate PSF-CUIR request"); 45975db8440cSStefan Haberland return PTR_ERR(cqr); 45985db8440cSStefan Haberland } 45995db8440cSStefan Haberland 46005db8440cSStefan Haberland psf_cuir = (struct dasd_psf_cuir_response *)cqr->data; 46015db8440cSStefan Haberland psf_cuir->order = PSF_ORDER_CUIR_RESPONSE; 46025db8440cSStefan Haberland psf_cuir->cc = response; 46035db8440cSStefan Haberland if (desc) 46045db8440cSStefan Haberland psf_cuir->chpid = desc->chpid; 46055db8440cSStefan Haberland psf_cuir->message_id = message_id; 46065db8440cSStefan Haberland psf_cuir->cssid = sch_id.cssid; 46075db8440cSStefan Haberland psf_cuir->ssid = sch_id.ssid; 46085db8440cSStefan Haberland 46095db8440cSStefan Haberland ccw = cqr->cpaddr; 46105db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 46115db8440cSStefan Haberland ccw->cda = (__u32)(addr_t)psf_cuir; 46125db8440cSStefan Haberland ccw->count = sizeof(struct dasd_psf_cuir_response); 46135db8440cSStefan Haberland 46145db8440cSStefan Haberland cqr->startdev = device; 46155db8440cSStefan Haberland cqr->memdev = device; 46165db8440cSStefan Haberland cqr->block = NULL; 46175db8440cSStefan Haberland cqr->retries = 256; 46185db8440cSStefan Haberland cqr->expires = 10*HZ; 46195db8440cSStefan Haberland cqr->buildclk = get_tod_clock(); 46205db8440cSStefan Haberland cqr->status = DASD_CQR_FILLED; 46215db8440cSStefan Haberland 46225db8440cSStefan Haberland rc = dasd_sleep_on(cqr); 46235db8440cSStefan Haberland 46245db8440cSStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 46255db8440cSStefan Haberland return rc; 46265db8440cSStefan Haberland } 46275db8440cSStefan Haberland 46285db8440cSStefan Haberland static int dasd_eckd_cuir_change_state(struct dasd_device *device, __u8 lpum) 46295db8440cSStefan Haberland { 46305db8440cSStefan Haberland unsigned long flags; 46315db8440cSStefan Haberland __u8 tbcpm; 46325db8440cSStefan Haberland 46335db8440cSStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 46345db8440cSStefan Haberland tbcpm = device->path_data.opm & ~lpum; 46355db8440cSStefan Haberland if (tbcpm) { 46365db8440cSStefan Haberland device->path_data.opm = tbcpm; 46375db8440cSStefan Haberland device->path_data.cuirpm |= lpum; 46385db8440cSStefan Haberland } 46395db8440cSStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 46405db8440cSStefan Haberland return tbcpm ? 0 : PSF_CUIR_LAST_PATH; 46415db8440cSStefan Haberland } 46425db8440cSStefan Haberland 46435db8440cSStefan Haberland /* 46445db8440cSStefan Haberland * walk through all devices and quiesce them 46455db8440cSStefan Haberland * if it is the last path return error 46465db8440cSStefan Haberland * 46475db8440cSStefan Haberland * if only part of the devices are quiesced and an error 46485db8440cSStefan Haberland * occurs no onlining necessary, the storage server will 46495db8440cSStefan Haberland * notify the already set offline devices again 46505db8440cSStefan Haberland */ 46515db8440cSStefan Haberland static int dasd_eckd_cuir_quiesce(struct dasd_device *device, __u8 lpum, 46525db8440cSStefan Haberland struct channel_path_desc *desc, 46535db8440cSStefan Haberland struct subchannel_id sch_id) 46545db8440cSStefan Haberland { 46555db8440cSStefan Haberland struct alias_pav_group *pavgroup, *tempgroup; 46565db8440cSStefan Haberland struct dasd_eckd_private *private; 46575db8440cSStefan Haberland struct dasd_device *dev, *n; 46585db8440cSStefan Haberland int rc; 46595db8440cSStefan Haberland 46605db8440cSStefan Haberland private = (struct dasd_eckd_private *) device->private; 46615db8440cSStefan Haberland rc = 0; 46625db8440cSStefan Haberland 46635db8440cSStefan Haberland /* active devices */ 46645db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 46655db8440cSStefan Haberland &private->lcu->active_devices, 46665db8440cSStefan Haberland alias_list) { 46675db8440cSStefan Haberland rc = dasd_eckd_cuir_change_state(dev, lpum); 46685db8440cSStefan Haberland if (rc) 46695db8440cSStefan Haberland goto out; 46705db8440cSStefan Haberland } 46715db8440cSStefan Haberland 46725db8440cSStefan Haberland /* inactive devices */ 46735db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 46745db8440cSStefan Haberland &private->lcu->inactive_devices, 46755db8440cSStefan Haberland alias_list) { 46765db8440cSStefan Haberland rc = dasd_eckd_cuir_change_state(dev, lpum); 46775db8440cSStefan Haberland if (rc) 46785db8440cSStefan Haberland goto out; 46795db8440cSStefan Haberland } 46805db8440cSStefan Haberland 46815db8440cSStefan Haberland /* devices in PAV groups */ 46825db8440cSStefan Haberland list_for_each_entry_safe(pavgroup, tempgroup, 46835db8440cSStefan Haberland &private->lcu->grouplist, group) { 46845db8440cSStefan Haberland list_for_each_entry_safe(dev, n, &pavgroup->baselist, 46855db8440cSStefan Haberland alias_list) { 46865db8440cSStefan Haberland rc = dasd_eckd_cuir_change_state(dev, lpum); 46875db8440cSStefan Haberland if (rc) 46885db8440cSStefan Haberland goto out; 46895db8440cSStefan Haberland } 46905db8440cSStefan Haberland list_for_each_entry_safe(dev, n, &pavgroup->aliaslist, 46915db8440cSStefan Haberland alias_list) { 46925db8440cSStefan Haberland rc = dasd_eckd_cuir_change_state(dev, lpum); 46935db8440cSStefan Haberland if (rc) 46945db8440cSStefan Haberland goto out; 46955db8440cSStefan Haberland } 46965db8440cSStefan Haberland } 46975db8440cSStefan Haberland 46985db8440cSStefan Haberland pr_warn("Service on the storage server caused path %x.%02x to go offline", 46995db8440cSStefan Haberland sch_id.cssid, desc ? desc->chpid : 0); 47005db8440cSStefan Haberland rc = PSF_CUIR_COMPLETED; 47015db8440cSStefan Haberland out: 47025db8440cSStefan Haberland return rc; 47035db8440cSStefan Haberland } 47045db8440cSStefan Haberland 47055db8440cSStefan Haberland static int dasd_eckd_cuir_resume(struct dasd_device *device, __u8 lpum, 47065db8440cSStefan Haberland struct channel_path_desc *desc, 47075db8440cSStefan Haberland struct subchannel_id sch_id) 47085db8440cSStefan Haberland { 47095db8440cSStefan Haberland struct alias_pav_group *pavgroup, *tempgroup; 47105db8440cSStefan Haberland struct dasd_eckd_private *private; 47115db8440cSStefan Haberland struct dasd_device *dev, *n; 47125db8440cSStefan Haberland 47135db8440cSStefan Haberland pr_info("Path %x.%02x is back online after service on the storage server", 47145db8440cSStefan Haberland sch_id.cssid, desc ? desc->chpid : 0); 47155db8440cSStefan Haberland private = (struct dasd_eckd_private *) device->private; 47165db8440cSStefan Haberland 47175db8440cSStefan Haberland /* 47185db8440cSStefan Haberland * the path may have been added through a generic path event before 47195db8440cSStefan Haberland * only trigger path verification if the path is not already in use 47205db8440cSStefan Haberland */ 47215db8440cSStefan Haberland 47225db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 47235db8440cSStefan Haberland &private->lcu->active_devices, 47245db8440cSStefan Haberland alias_list) { 47255db8440cSStefan Haberland if (!(dev->path_data.opm & lpum)) { 47265db8440cSStefan Haberland dev->path_data.tbvpm |= lpum; 47275db8440cSStefan Haberland dasd_schedule_device_bh(dev); 47285db8440cSStefan Haberland } 47295db8440cSStefan Haberland } 47305db8440cSStefan Haberland 47315db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 47325db8440cSStefan Haberland &private->lcu->inactive_devices, 47335db8440cSStefan Haberland alias_list) { 47345db8440cSStefan Haberland if (!(dev->path_data.opm & lpum)) { 47355db8440cSStefan Haberland dev->path_data.tbvpm |= lpum; 47365db8440cSStefan Haberland dasd_schedule_device_bh(dev); 47375db8440cSStefan Haberland } 47385db8440cSStefan Haberland } 47395db8440cSStefan Haberland 47405db8440cSStefan Haberland /* devices in PAV groups */ 47415db8440cSStefan Haberland list_for_each_entry_safe(pavgroup, tempgroup, 47425db8440cSStefan Haberland &private->lcu->grouplist, 47435db8440cSStefan Haberland group) { 47445db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 47455db8440cSStefan Haberland &pavgroup->baselist, 47465db8440cSStefan Haberland alias_list) { 47475db8440cSStefan Haberland if (!(dev->path_data.opm & lpum)) { 47485db8440cSStefan Haberland dev->path_data.tbvpm |= lpum; 47495db8440cSStefan Haberland dasd_schedule_device_bh(dev); 47505db8440cSStefan Haberland } 47515db8440cSStefan Haberland } 47525db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 47535db8440cSStefan Haberland &pavgroup->aliaslist, 47545db8440cSStefan Haberland alias_list) { 47555db8440cSStefan Haberland if (!(dev->path_data.opm & lpum)) { 47565db8440cSStefan Haberland dev->path_data.tbvpm |= lpum; 47575db8440cSStefan Haberland dasd_schedule_device_bh(dev); 47585db8440cSStefan Haberland } 47595db8440cSStefan Haberland } 47605db8440cSStefan Haberland } 47615db8440cSStefan Haberland return PSF_CUIR_COMPLETED; 47625db8440cSStefan Haberland } 47635db8440cSStefan Haberland 47645db8440cSStefan Haberland static void dasd_eckd_handle_cuir(struct dasd_device *device, void *messages, 47655db8440cSStefan Haberland __u8 lpum) 47665db8440cSStefan Haberland { 47675db8440cSStefan Haberland struct dasd_cuir_message *cuir = messages; 47685db8440cSStefan Haberland struct channel_path_desc *desc; 47695db8440cSStefan Haberland struct subchannel_id sch_id; 47705db8440cSStefan Haberland int pos, response; 47715db8440cSStefan Haberland ccw_device_get_schid(device->cdev, &sch_id); 47725db8440cSStefan Haberland 47735db8440cSStefan Haberland /* get position of path in mask */ 47745db8440cSStefan Haberland pos = 8 - ffs(lpum); 47755db8440cSStefan Haberland /* get channel path descriptor from this position */ 47765db8440cSStefan Haberland desc = ccw_device_get_chp_desc(device->cdev, pos); 47775db8440cSStefan Haberland 47785db8440cSStefan Haberland if (cuir->code == CUIR_QUIESCE) { 47795db8440cSStefan Haberland /* quiesce */ 47805db8440cSStefan Haberland response = dasd_eckd_cuir_quiesce(device, lpum, desc, sch_id); 47815db8440cSStefan Haberland } else if (cuir->code == CUIR_RESUME) { 47825db8440cSStefan Haberland /* resume */ 47835db8440cSStefan Haberland response = dasd_eckd_cuir_resume(device, lpum, desc, sch_id); 47845db8440cSStefan Haberland } else 47855db8440cSStefan Haberland response = PSF_CUIR_NOT_SUPPORTED; 47865db8440cSStefan Haberland 47875db8440cSStefan Haberland dasd_eckd_psf_cuir_response(device, response, cuir->message_id, 47885db8440cSStefan Haberland desc, sch_id); 47895db8440cSStefan Haberland 47905db8440cSStefan Haberland /* free descriptor copy */ 47915db8440cSStefan Haberland kfree(desc); 47925db8440cSStefan Haberland } 47935db8440cSStefan Haberland 47945db8440cSStefan Haberland static void dasd_eckd_check_attention_work(struct work_struct *work) 47955db8440cSStefan Haberland { 47965db8440cSStefan Haberland struct check_attention_work_data *data; 47975db8440cSStefan Haberland struct dasd_rssd_messages *messages; 47985db8440cSStefan Haberland struct dasd_device *device; 47995db8440cSStefan Haberland int rc; 48005db8440cSStefan Haberland 48015db8440cSStefan Haberland data = container_of(work, struct check_attention_work_data, worker); 48025db8440cSStefan Haberland device = data->device; 48035db8440cSStefan Haberland 48045db8440cSStefan Haberland messages = kzalloc(sizeof(*messages), GFP_KERNEL); 48055db8440cSStefan Haberland if (!messages) { 48065db8440cSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 48075db8440cSStefan Haberland "Could not allocate attention message buffer"); 48085db8440cSStefan Haberland goto out; 48095db8440cSStefan Haberland } 48105db8440cSStefan Haberland 48115db8440cSStefan Haberland rc = dasd_eckd_read_message_buffer(device, messages, data->lpum); 48125db8440cSStefan Haberland if (rc) 48135db8440cSStefan Haberland goto out; 48145db8440cSStefan Haberland 48155db8440cSStefan Haberland if (messages->length == ATTENTION_LENGTH_CUIR && 48165db8440cSStefan Haberland messages->format == ATTENTION_FORMAT_CUIR) 48175db8440cSStefan Haberland dasd_eckd_handle_cuir(device, messages, data->lpum); 48185db8440cSStefan Haberland 48195db8440cSStefan Haberland out: 48205db8440cSStefan Haberland dasd_put_device(device); 48215db8440cSStefan Haberland kfree(messages); 48225db8440cSStefan Haberland kfree(data); 48235db8440cSStefan Haberland } 48245db8440cSStefan Haberland 48255db8440cSStefan Haberland static int dasd_eckd_check_attention(struct dasd_device *device, __u8 lpum) 48265db8440cSStefan Haberland { 48275db8440cSStefan Haberland struct check_attention_work_data *data; 48285db8440cSStefan Haberland 48295db8440cSStefan Haberland data = kzalloc(sizeof(*data), GFP_ATOMIC); 48305db8440cSStefan Haberland if (!data) 48315db8440cSStefan Haberland return -ENOMEM; 48325db8440cSStefan Haberland INIT_WORK(&data->worker, dasd_eckd_check_attention_work); 48335db8440cSStefan Haberland dasd_get_device(device); 48345db8440cSStefan Haberland data->device = device; 48355db8440cSStefan Haberland data->lpum = lpum; 48365db8440cSStefan Haberland schedule_work(&data->worker); 48375db8440cSStefan Haberland return 0; 48385db8440cSStefan Haberland } 48395db8440cSStefan Haberland 4840d41dd122SStefan Haberland static struct ccw_driver dasd_eckd_driver = { 48413bda058bSSebastian Ott .driver = { 4842d41dd122SStefan Haberland .name = "dasd-eckd", 4843d41dd122SStefan Haberland .owner = THIS_MODULE, 48443bda058bSSebastian Ott }, 4845d41dd122SStefan Haberland .ids = dasd_eckd_ids, 4846d41dd122SStefan Haberland .probe = dasd_eckd_probe, 4847d41dd122SStefan Haberland .remove = dasd_generic_remove, 4848d41dd122SStefan Haberland .set_offline = dasd_generic_set_offline, 4849d41dd122SStefan Haberland .set_online = dasd_eckd_set_online, 4850d41dd122SStefan Haberland .notify = dasd_generic_notify, 4851a4d26c6aSStefan Weinhuber .path_event = dasd_generic_path_event, 48524679e893SStefan Haberland .shutdown = dasd_generic_shutdown, 4853d41dd122SStefan Haberland .freeze = dasd_generic_pm_freeze, 4854d41dd122SStefan Haberland .thaw = dasd_generic_restore_device, 4855d41dd122SStefan Haberland .restore = dasd_generic_restore_device, 4856a23ed009SStefan Haberland .uc_handler = dasd_generic_uc_handler, 4857420f42ecSHeiko Carstens .int_class = IRQIO_DAS, 4858d41dd122SStefan Haberland }; 4859f3eb5384SStefan Weinhuber 48601da177e4SLinus Torvalds /* 48611da177e4SLinus Torvalds * max_blocks is dependent on the amount of storage that is available 48621da177e4SLinus Torvalds * in the static io buffer for each device. Currently each device has 48631da177e4SLinus Torvalds * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has 48641da177e4SLinus Torvalds * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use 48651da177e4SLinus Torvalds * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In 48661da177e4SLinus Torvalds * addition we have one define extent ccw + 16 bytes of data and one 48671da177e4SLinus Torvalds * locate record ccw + 16 bytes of data. That makes: 48681da177e4SLinus Torvalds * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. 48691da177e4SLinus Torvalds * We want to fit two into the available memory so that we can immediately 48701da177e4SLinus Torvalds * start the next request if one finishes off. That makes 249.5 blocks 48711da177e4SLinus Torvalds * for one request. Give a little safety and the result is 240. 48721da177e4SLinus Torvalds */ 48731da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline = { 48741da177e4SLinus Torvalds .owner = THIS_MODULE, 48751da177e4SLinus Torvalds .name = "ECKD", 48761da177e4SLinus Torvalds .ebcname = "ECKD", 4877ef19298bSStefan Weinhuber .max_blocks = 190, 48781da177e4SLinus Torvalds .check_device = dasd_eckd_check_characteristics, 48798e09f215SStefan Weinhuber .uncheck_device = dasd_eckd_uncheck_device, 48801da177e4SLinus Torvalds .do_analysis = dasd_eckd_do_analysis, 4881a4d26c6aSStefan Weinhuber .verify_path = dasd_eckd_verify_path, 4882d42e1712SStefan Haberland .basic_to_ready = dasd_eckd_basic_to_ready, 48838e09f215SStefan Weinhuber .online_to_ready = dasd_eckd_online_to_ready, 4884daa991bfSStefan Haberland .basic_to_known = dasd_eckd_basic_to_known, 48851da177e4SLinus Torvalds .fill_geometry = dasd_eckd_fill_geometry, 48861da177e4SLinus Torvalds .start_IO = dasd_start_IO, 48871da177e4SLinus Torvalds .term_IO = dasd_term_IO, 48888e09f215SStefan Weinhuber .handle_terminated_request = dasd_eckd_handle_terminated_request, 48891da177e4SLinus Torvalds .format_device = dasd_eckd_format_device, 48901da177e4SLinus Torvalds .erp_action = dasd_eckd_erp_action, 48911da177e4SLinus Torvalds .erp_postaction = dasd_eckd_erp_postaction, 48925a27e60dSStefan Weinhuber .check_for_device_change = dasd_eckd_check_for_device_change, 48938e09f215SStefan Weinhuber .build_cp = dasd_eckd_build_alias_cp, 48948e09f215SStefan Weinhuber .free_cp = dasd_eckd_free_alias_cp, 48951da177e4SLinus Torvalds .dump_sense = dasd_eckd_dump_sense, 4896fc19f381SStefan Haberland .dump_sense_dbf = dasd_eckd_dump_sense_dbf, 48971da177e4SLinus Torvalds .fill_info = dasd_eckd_fill_info, 48981107ccfbSChristoph Hellwig .ioctl = dasd_eckd_ioctl, 4899d41dd122SStefan Haberland .freeze = dasd_eckd_pm_freeze, 4900d41dd122SStefan Haberland .restore = dasd_eckd_restore_device, 4901501183f2SStefan Haberland .reload = dasd_eckd_reload_device, 49022dedf0d9SStefan Haberland .get_uid = dasd_eckd_get_uid, 4903f1633031SStefan Haberland .kick_validate = dasd_eckd_kick_validate_server, 49045db8440cSStefan Haberland .check_attention = dasd_eckd_check_attention, 49051da177e4SLinus Torvalds }; 49061da177e4SLinus Torvalds 49071da177e4SLinus Torvalds static int __init 49081da177e4SLinus Torvalds dasd_eckd_init(void) 49091da177e4SLinus Torvalds { 4910736e6ea0SSebastian Ott int ret; 4911736e6ea0SSebastian Ott 49121da177e4SLinus Torvalds ASCEBC(dasd_eckd_discipline.ebcname, 4); 4913f932bceaSStefan Weinhuber dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), 4914f932bceaSStefan Weinhuber GFP_KERNEL | GFP_DMA); 4915f932bceaSStefan Weinhuber if (!dasd_reserve_req) 4916f932bceaSStefan Weinhuber return -ENOMEM; 4917a4d26c6aSStefan Weinhuber path_verification_worker = kmalloc(sizeof(*path_verification_worker), 4918a4d26c6aSStefan Weinhuber GFP_KERNEL | GFP_DMA); 4919a4d26c6aSStefan Weinhuber if (!path_verification_worker) { 4920a4d26c6aSStefan Weinhuber kfree(dasd_reserve_req); 4921a4d26c6aSStefan Weinhuber return -ENOMEM; 4922a4d26c6aSStefan Weinhuber } 4923558b9ef0SStefan Weinhuber rawpadpage = (void *)__get_free_page(GFP_KERNEL); 4924558b9ef0SStefan Weinhuber if (!rawpadpage) { 4925558b9ef0SStefan Weinhuber kfree(path_verification_worker); 4926558b9ef0SStefan Weinhuber kfree(dasd_reserve_req); 4927558b9ef0SStefan Weinhuber return -ENOMEM; 4928558b9ef0SStefan Weinhuber } 4929736e6ea0SSebastian Ott ret = ccw_driver_register(&dasd_eckd_driver); 4930736e6ea0SSebastian Ott if (!ret) 4931736e6ea0SSebastian Ott wait_for_device_probe(); 4932a4d26c6aSStefan Weinhuber else { 4933a4d26c6aSStefan Weinhuber kfree(path_verification_worker); 4934f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 4935558b9ef0SStefan Weinhuber free_page((unsigned long)rawpadpage); 4936a4d26c6aSStefan Weinhuber } 4937736e6ea0SSebastian Ott return ret; 49381da177e4SLinus Torvalds } 49391da177e4SLinus Torvalds 49401da177e4SLinus Torvalds static void __exit 49411da177e4SLinus Torvalds dasd_eckd_cleanup(void) 49421da177e4SLinus Torvalds { 49431da177e4SLinus Torvalds ccw_driver_unregister(&dasd_eckd_driver); 4944a4d26c6aSStefan Weinhuber kfree(path_verification_worker); 4945f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 4946558b9ef0SStefan Weinhuber free_page((unsigned long)rawpadpage); 49471da177e4SLinus Torvalds } 49481da177e4SLinus Torvalds 49491da177e4SLinus Torvalds module_init(dasd_eckd_init); 49501da177e4SLinus Torvalds module_exit(dasd_eckd_cleanup); 4951