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> 225a3b7b11SStefan Haberland #include <linux/seq_file.h> 231da177e4SLinus Torvalds 24382b7366SSebastian Ott #include <asm/css_chars.h> 251da177e4SLinus Torvalds #include <asm/debug.h> 261da177e4SLinus Torvalds #include <asm/idals.h> 271da177e4SLinus Torvalds #include <asm/ebcdic.h> 281da177e4SLinus Torvalds #include <asm/io.h> 291da177e4SLinus Torvalds #include <asm/uaccess.h> 3040545573SHorst Hummel #include <asm/cio.h> 311da177e4SLinus Torvalds #include <asm/ccwdev.h> 32f3eb5384SStefan Weinhuber #include <asm/itcw.h> 335db8440cSStefan Haberland #include <asm/schid.h> 345db8440cSStefan Haberland #include <asm/chpid.h> 351da177e4SLinus Torvalds 361da177e4SLinus Torvalds #include "dasd_int.h" 371da177e4SLinus Torvalds #include "dasd_eckd.h" 381da177e4SLinus Torvalds 391da177e4SLinus Torvalds #ifdef PRINTK_HEADER 401da177e4SLinus Torvalds #undef PRINTK_HEADER 411da177e4SLinus Torvalds #endif /* PRINTK_HEADER */ 421da177e4SLinus Torvalds #define PRINTK_HEADER "dasd(eckd):" 431da177e4SLinus Torvalds 441da177e4SLinus Torvalds #define ECKD_C0(i) (i->home_bytes) 451da177e4SLinus Torvalds #define ECKD_F(i) (i->formula) 461da177e4SLinus Torvalds #define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\ 471da177e4SLinus Torvalds (i->factors.f_0x02.f1)) 481da177e4SLinus Torvalds #define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\ 491da177e4SLinus Torvalds (i->factors.f_0x02.f2)) 501da177e4SLinus Torvalds #define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\ 511da177e4SLinus Torvalds (i->factors.f_0x02.f3)) 521da177e4SLinus Torvalds #define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0) 531da177e4SLinus Torvalds #define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0) 541da177e4SLinus Torvalds #define ECKD_F6(i) (i->factor6) 551da177e4SLinus Torvalds #define ECKD_F7(i) (i->factor7) 561da177e4SLinus Torvalds #define ECKD_F8(i) (i->factor8) 571da177e4SLinus Torvalds 58e4dbb0f2SStefan Haberland /* 59e4dbb0f2SStefan Haberland * raw track access always map to 64k in memory 60e4dbb0f2SStefan Haberland * so it maps to 16 blocks of 4k per track 61e4dbb0f2SStefan Haberland */ 62e4dbb0f2SStefan Haberland #define DASD_RAW_BLOCK_PER_TRACK 16 63e4dbb0f2SStefan Haberland #define DASD_RAW_BLOCKSIZE 4096 64e4dbb0f2SStefan Haberland /* 64k are 128 x 512 byte sectors */ 65e4dbb0f2SStefan Haberland #define DASD_RAW_SECTORS_PER_TRACK 128 66e4dbb0f2SStefan Haberland 671da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 681da177e4SLinus Torvalds 691da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline; 701da177e4SLinus Torvalds 711da177e4SLinus Torvalds /* The ccw bus type uses this table to find devices that it sends to 721da177e4SLinus Torvalds * dasd_eckd_probe */ 731da177e4SLinus Torvalds static struct ccw_device_id dasd_eckd_ids[] = { 74d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1}, 75d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2}, 765da24b76SStefan Haberland { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3380, 0), .driver_info = 0x3}, 77d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4}, 78d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5}, 79d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6}, 80d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7}, 81d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8}, 82d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9}, 83d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa}, 841da177e4SLinus Torvalds { /* end of list */ }, 851da177e4SLinus Torvalds }; 861da177e4SLinus Torvalds 871da177e4SLinus Torvalds MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids); 881da177e4SLinus Torvalds 891da177e4SLinus Torvalds static struct ccw_driver dasd_eckd_driver; /* see below */ 901da177e4SLinus Torvalds 91558b9ef0SStefan Weinhuber static void *rawpadpage; 92558b9ef0SStefan Weinhuber 93eb6e199bSStefan Weinhuber #define INIT_CQR_OK 0 94eb6e199bSStefan Weinhuber #define INIT_CQR_UNFORMATTED 1 95eb6e199bSStefan Weinhuber #define INIT_CQR_ERROR 2 96eb6e199bSStefan Weinhuber 97f932bceaSStefan Weinhuber /* emergency request for reserve/release */ 98f932bceaSStefan Weinhuber static struct { 99f932bceaSStefan Weinhuber struct dasd_ccw_req cqr; 100f932bceaSStefan Weinhuber struct ccw1 ccw; 101f932bceaSStefan Weinhuber char data[32]; 102f932bceaSStefan Weinhuber } *dasd_reserve_req; 103f932bceaSStefan Weinhuber static DEFINE_MUTEX(dasd_reserve_mutex); 104f932bceaSStefan Weinhuber 105a4d26c6aSStefan Weinhuber /* definitions for the path verification worker */ 106a4d26c6aSStefan Weinhuber struct path_verification_work_data { 107a4d26c6aSStefan Weinhuber struct work_struct worker; 108a4d26c6aSStefan Weinhuber struct dasd_device *device; 109a4d26c6aSStefan Weinhuber struct dasd_ccw_req cqr; 110a4d26c6aSStefan Weinhuber struct ccw1 ccw; 111a4d26c6aSStefan Weinhuber __u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE]; 112a4d26c6aSStefan Weinhuber int isglobal; 113a4d26c6aSStefan Weinhuber __u8 tbvpm; 114a4d26c6aSStefan Weinhuber }; 115a4d26c6aSStefan Weinhuber static struct path_verification_work_data *path_verification_worker; 116a4d26c6aSStefan Weinhuber static DEFINE_MUTEX(dasd_path_verification_mutex); 117eb6e199bSStefan Weinhuber 1185db8440cSStefan Haberland struct check_attention_work_data { 1195db8440cSStefan Haberland struct work_struct worker; 1205db8440cSStefan Haberland struct dasd_device *device; 1215db8440cSStefan Haberland __u8 lpum; 1225db8440cSStefan Haberland }; 1235db8440cSStefan Haberland 1248fd57520SJan Höppner static int prepare_itcw(struct itcw *, unsigned int, unsigned int, int, 1258fd57520SJan Höppner struct dasd_device *, struct dasd_device *, 1268fd57520SJan Höppner unsigned int, int, unsigned int, unsigned int, 1278fd57520SJan Höppner unsigned int, unsigned int); 1288fd57520SJan Höppner 1291da177e4SLinus Torvalds /* initial attempt at a probe function. this can be simplified once 1301da177e4SLinus Torvalds * the other detection code is gone */ 1311da177e4SLinus Torvalds static int 1321da177e4SLinus Torvalds dasd_eckd_probe (struct ccw_device *cdev) 1331da177e4SLinus Torvalds { 1341da177e4SLinus Torvalds int ret; 1351da177e4SLinus Torvalds 13640545573SHorst Hummel /* set ECKD specific ccw-device options */ 137454e1fa1SPeter Oberparleiter ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE | 138454e1fa1SPeter Oberparleiter CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH); 13940545573SHorst Hummel if (ret) { 140b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s", 141b8ed5dd5SStefan Haberland "dasd_eckd_probe: could not set " 142b8ed5dd5SStefan Haberland "ccw-device options"); 1431da177e4SLinus Torvalds return ret; 14440545573SHorst Hummel } 14540545573SHorst Hummel ret = dasd_generic_probe(cdev, &dasd_eckd_discipline); 14640545573SHorst Hummel return ret; 1471da177e4SLinus Torvalds } 1481da177e4SLinus Torvalds 1491da177e4SLinus Torvalds static int 1501da177e4SLinus Torvalds dasd_eckd_set_online(struct ccw_device *cdev) 1511da177e4SLinus Torvalds { 1521da177e4SLinus Torvalds return dasd_generic_set_online(cdev, &dasd_eckd_discipline); 1531da177e4SLinus Torvalds } 1541da177e4SLinus Torvalds 1551da177e4SLinus Torvalds static const int sizes_trk0[] = { 28, 148, 84 }; 1561da177e4SLinus Torvalds #define LABEL_SIZE 140 1571da177e4SLinus Torvalds 1583bc9fef9SStefan Haberland /* head and record addresses of count_area read in analysis ccw */ 1593bc9fef9SStefan Haberland static const int count_area_head[] = { 0, 0, 0, 0, 2 }; 1603bc9fef9SStefan Haberland static const int count_area_rec[] = { 1, 2, 3, 4, 1 }; 1613bc9fef9SStefan Haberland 1621da177e4SLinus Torvalds static inline unsigned int 1631da177e4SLinus Torvalds round_up_multiple(unsigned int no, unsigned int mult) 1641da177e4SLinus Torvalds { 1651da177e4SLinus Torvalds int rem = no % mult; 1661da177e4SLinus Torvalds return (rem ? no - rem + mult : no); 1671da177e4SLinus Torvalds } 1681da177e4SLinus Torvalds 1691da177e4SLinus Torvalds static inline unsigned int 1701da177e4SLinus Torvalds ceil_quot(unsigned int d1, unsigned int d2) 1711da177e4SLinus Torvalds { 1721da177e4SLinus Torvalds return (d1 + (d2 - 1)) / d2; 1731da177e4SLinus Torvalds } 1741da177e4SLinus Torvalds 1754d284cacSHeiko Carstens static unsigned int 1761da177e4SLinus Torvalds recs_per_track(struct dasd_eckd_characteristics * rdc, 1771da177e4SLinus Torvalds unsigned int kl, unsigned int dl) 1781da177e4SLinus Torvalds { 1791da177e4SLinus Torvalds int dn, kn; 1801da177e4SLinus Torvalds 1811da177e4SLinus Torvalds switch (rdc->dev_type) { 1821da177e4SLinus Torvalds case 0x3380: 1831da177e4SLinus Torvalds if (kl) 1841da177e4SLinus Torvalds return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + 1851da177e4SLinus Torvalds ceil_quot(dl + 12, 32)); 1861da177e4SLinus Torvalds else 1871da177e4SLinus Torvalds return 1499 / (15 + ceil_quot(dl + 12, 32)); 1881da177e4SLinus Torvalds case 0x3390: 1891da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1901da177e4SLinus Torvalds if (kl) { 1911da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1921da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + 1931da177e4SLinus Torvalds 9 + ceil_quot(dl + 6 * dn, 34)); 1941da177e4SLinus Torvalds } else 1951da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); 1961da177e4SLinus Torvalds case 0x9345: 1971da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1981da177e4SLinus Torvalds if (kl) { 1991da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 2001da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + 2011da177e4SLinus Torvalds ceil_quot(dl + 6 * dn, 34)); 2021da177e4SLinus Torvalds } else 2031da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); 2041da177e4SLinus Torvalds } 2051da177e4SLinus Torvalds return 0; 2061da177e4SLinus Torvalds } 2071da177e4SLinus Torvalds 208b44b0ab3SStefan Weinhuber static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head) 209b44b0ab3SStefan Weinhuber { 210b44b0ab3SStefan Weinhuber geo->cyl = (__u16) cyl; 211b44b0ab3SStefan Weinhuber geo->head = cyl >> 16; 212b44b0ab3SStefan Weinhuber geo->head <<= 4; 213b44b0ab3SStefan Weinhuber geo->head |= head; 214b44b0ab3SStefan Weinhuber } 215b44b0ab3SStefan Weinhuber 2164d284cacSHeiko Carstens static int 2171da177e4SLinus Torvalds check_XRC (struct ccw1 *de_ccw, 2181da177e4SLinus Torvalds struct DE_eckd_data *data, 2191da177e4SLinus Torvalds struct dasd_device *device) 2201da177e4SLinus Torvalds { 221543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 222d54853efSMartin Schwidefsky int rc; 2231da177e4SLinus Torvalds 224d54853efSMartin Schwidefsky if (!private->rdc_data.facilities.XRC_supported) 225d54853efSMartin Schwidefsky return 0; 2261da177e4SLinus Torvalds 2271da177e4SLinus Torvalds /* switch on System Time Stamp - needed for XRC Support */ 2281da177e4SLinus Torvalds data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ 2291da177e4SLinus Torvalds data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ 2301da177e4SLinus Torvalds 23140277891SMartin Schwidefsky rc = get_phys_clock(&data->ep_sys_time); 232d54853efSMartin Schwidefsky /* Ignore return code if sync clock is switched off. */ 233a8f6db4dSHeiko Carstens if (rc == -EOPNOTSUPP || rc == -EACCES) 234d54853efSMartin Schwidefsky rc = 0; 2351da177e4SLinus Torvalds 2361da177e4SLinus Torvalds de_ccw->count = sizeof(struct DE_eckd_data); 2371da177e4SLinus Torvalds de_ccw->flags |= CCW_FLAG_SLI; 238d54853efSMartin Schwidefsky return rc; 2391da177e4SLinus Torvalds } 2401da177e4SLinus Torvalds 2414d284cacSHeiko Carstens static int 242b44b0ab3SStefan Weinhuber define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk, 243b44b0ab3SStefan Weinhuber unsigned int totrk, int cmd, struct dasd_device *device) 2441da177e4SLinus Torvalds { 245543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 246b44b0ab3SStefan Weinhuber u32 begcyl, endcyl; 247b44b0ab3SStefan Weinhuber u16 heads, beghead, endhead; 248d54853efSMartin Schwidefsky int rc = 0; 2491da177e4SLinus Torvalds 2501da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; 2511da177e4SLinus Torvalds ccw->flags = 0; 2521da177e4SLinus Torvalds ccw->count = 16; 2531da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 2541da177e4SLinus Torvalds 2551da177e4SLinus Torvalds memset(data, 0, sizeof(struct DE_eckd_data)); 2561da177e4SLinus Torvalds switch (cmd) { 2571da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 2581da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 2591da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 2601da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 2611da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 2621da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 2631da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 2641da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 2651da177e4SLinus Torvalds data->mask.perm = 0x1; 2661da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 2671da177e4SLinus Torvalds break; 2688fd57520SJan Höppner case DASD_ECKD_CCW_READ_COUNT: 2698fd57520SJan Höppner data->mask.perm = 0x1; 2708fd57520SJan Höppner data->attributes.operation = DASD_BYPASS_CACHE; 2718fd57520SJan Höppner break; 2721da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 2731da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 2741da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 2751da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 2761da177e4SLinus Torvalds data->mask.perm = 0x02; 2771da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 278d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2791da177e4SLinus Torvalds break; 2801da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 2811da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 2821da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 283d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2841da177e4SLinus Torvalds break; 2851da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 2861da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 2871da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 2881da177e4SLinus Torvalds data->mask.perm = 0x3; 2891da177e4SLinus Torvalds data->mask.auth = 0x1; 2901da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 291d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2921da177e4SLinus Torvalds break; 2931da177e4SLinus Torvalds default: 294fc19f381SStefan Haberland dev_err(&device->cdev->dev, 295fc19f381SStefan Haberland "0x%x is not a known command\n", cmd); 2961da177e4SLinus Torvalds break; 2971da177e4SLinus Torvalds } 2981da177e4SLinus Torvalds 2991da177e4SLinus Torvalds data->attributes.mode = 0x3; /* ECKD */ 3001da177e4SLinus Torvalds 3011da177e4SLinus Torvalds if ((private->rdc_data.cu_type == 0x2105 || 3021da177e4SLinus Torvalds private->rdc_data.cu_type == 0x2107 || 3031da177e4SLinus Torvalds private->rdc_data.cu_type == 0x1750) 3041da177e4SLinus Torvalds && !(private->uses_cdl && trk < 2)) 3051da177e4SLinus Torvalds data->ga_extended |= 0x40; /* Regular Data Format Mode */ 3061da177e4SLinus Torvalds 307b44b0ab3SStefan Weinhuber heads = private->rdc_data.trk_per_cyl; 308b44b0ab3SStefan Weinhuber begcyl = trk / heads; 309b44b0ab3SStefan Weinhuber beghead = trk % heads; 310b44b0ab3SStefan Weinhuber endcyl = totrk / heads; 311b44b0ab3SStefan Weinhuber endhead = totrk % heads; 3121da177e4SLinus Torvalds 3131da177e4SLinus Torvalds /* check for sequential prestage - enhance cylinder range */ 3141da177e4SLinus Torvalds if (data->attributes.operation == DASD_SEQ_PRESTAGE || 3151da177e4SLinus Torvalds data->attributes.operation == DASD_SEQ_ACCESS) { 3161da177e4SLinus Torvalds 317b44b0ab3SStefan Weinhuber if (endcyl + private->attrib.nr_cyl < private->real_cyl) 318b44b0ab3SStefan Weinhuber endcyl += private->attrib.nr_cyl; 3191da177e4SLinus Torvalds else 320b44b0ab3SStefan Weinhuber endcyl = (private->real_cyl - 1); 3211da177e4SLinus Torvalds } 3221da177e4SLinus Torvalds 323b44b0ab3SStefan Weinhuber set_ch_t(&data->beg_ext, begcyl, beghead); 324b44b0ab3SStefan Weinhuber set_ch_t(&data->end_ext, endcyl, endhead); 325d54853efSMartin Schwidefsky return rc; 3261da177e4SLinus Torvalds } 3271da177e4SLinus Torvalds 3288e09f215SStefan Weinhuber static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata, 3298e09f215SStefan Weinhuber struct dasd_device *device) 3308e09f215SStefan Weinhuber { 331543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 3328e09f215SStefan Weinhuber int rc; 3338e09f215SStefan Weinhuber 3348e09f215SStefan Weinhuber if (!private->rdc_data.facilities.XRC_supported) 3358e09f215SStefan Weinhuber return 0; 3368e09f215SStefan Weinhuber 3378e09f215SStefan Weinhuber /* switch on System Time Stamp - needed for XRC Support */ 338f3eb5384SStefan Weinhuber pfxdata->define_extent.ga_extended |= 0x08; /* 'Time Stamp Valid' */ 339f3eb5384SStefan Weinhuber pfxdata->define_extent.ga_extended |= 0x02; /* 'Extended Parameter' */ 3408e09f215SStefan Weinhuber pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */ 3418e09f215SStefan Weinhuber 34240277891SMartin Schwidefsky rc = get_phys_clock(&pfxdata->define_extent.ep_sys_time); 3438e09f215SStefan Weinhuber /* Ignore return code if sync clock is switched off. */ 344a8f6db4dSHeiko Carstens if (rc == -EOPNOTSUPP || rc == -EACCES) 3458e09f215SStefan Weinhuber rc = 0; 3468e09f215SStefan Weinhuber return rc; 3478e09f215SStefan Weinhuber } 3488e09f215SStefan Weinhuber 349f3eb5384SStefan Weinhuber static void fill_LRE_data(struct LRE_eckd_data *data, unsigned int trk, 350f3eb5384SStefan Weinhuber unsigned int rec_on_trk, int count, int cmd, 351f3eb5384SStefan Weinhuber struct dasd_device *device, unsigned int reclen, 352f3eb5384SStefan Weinhuber unsigned int tlf) 353f3eb5384SStefan Weinhuber { 354543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 355f3eb5384SStefan Weinhuber int sector; 356f3eb5384SStefan Weinhuber int dn, d; 357f3eb5384SStefan Weinhuber 358f3eb5384SStefan Weinhuber memset(data, 0, sizeof(*data)); 359f3eb5384SStefan Weinhuber sector = 0; 360f3eb5384SStefan Weinhuber if (rec_on_trk) { 361f3eb5384SStefan Weinhuber switch (private->rdc_data.dev_type) { 362f3eb5384SStefan Weinhuber case 0x3390: 363f3eb5384SStefan Weinhuber dn = ceil_quot(reclen + 6, 232); 364f3eb5384SStefan Weinhuber d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 365f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 366f3eb5384SStefan Weinhuber break; 367f3eb5384SStefan Weinhuber case 0x3380: 368f3eb5384SStefan Weinhuber d = 7 + ceil_quot(reclen + 12, 32); 369f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 370f3eb5384SStefan Weinhuber break; 371f3eb5384SStefan Weinhuber } 372f3eb5384SStefan Weinhuber } 373f3eb5384SStefan Weinhuber data->sector = sector; 374f3eb5384SStefan Weinhuber /* note: meaning of count depends on the operation 375f3eb5384SStefan Weinhuber * for record based I/O it's the number of records, but for 376f3eb5384SStefan Weinhuber * track based I/O it's the number of tracks 377f3eb5384SStefan Weinhuber */ 378f3eb5384SStefan Weinhuber data->count = count; 379f3eb5384SStefan Weinhuber switch (cmd) { 380f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 381f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 382f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 383f3eb5384SStefan Weinhuber break; 384f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_HOME_ADDRESS: 385f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 386f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 387f3eb5384SStefan Weinhuber break; 388f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 389f3eb5384SStefan Weinhuber data->operation.orientation = 0x1; 390f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 391f3eb5384SStefan Weinhuber data->count++; 392f3eb5384SStefan Weinhuber break; 393f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_RECORD_ZERO: 394f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 395f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 396f3eb5384SStefan Weinhuber data->count++; 397f3eb5384SStefan Weinhuber break; 398f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE: 399f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_MT: 400f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD: 401f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD_MT: 402f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 403f3eb5384SStefan Weinhuber data->length = reclen; 404f3eb5384SStefan Weinhuber data->operation.operation = 0x01; 405f3eb5384SStefan Weinhuber break; 406f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD: 407f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD_MT: 408f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 409f3eb5384SStefan Weinhuber data->length = reclen; 410f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 411f3eb5384SStefan Weinhuber break; 412e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_WRITE_FULL_TRACK: 413e4dbb0f2SStefan Haberland data->operation.orientation = 0x0; 414e4dbb0f2SStefan Haberland data->operation.operation = 0x3F; 415e4dbb0f2SStefan Haberland data->extended_operation = 0x11; 416e4dbb0f2SStefan Haberland data->length = 0; 417e4dbb0f2SStefan Haberland data->extended_parameter_length = 0x02; 418e4dbb0f2SStefan Haberland if (data->count > 8) { 419e4dbb0f2SStefan Haberland data->extended_parameter[0] = 0xFF; 420e4dbb0f2SStefan Haberland data->extended_parameter[1] = 0xFF; 421e4dbb0f2SStefan Haberland data->extended_parameter[1] <<= (16 - count); 422e4dbb0f2SStefan Haberland } else { 423e4dbb0f2SStefan Haberland data->extended_parameter[0] = 0xFF; 424e4dbb0f2SStefan Haberland data->extended_parameter[0] <<= (8 - count); 425e4dbb0f2SStefan Haberland data->extended_parameter[1] = 0x00; 426e4dbb0f2SStefan Haberland } 427e4dbb0f2SStefan Haberland data->sector = 0xFF; 428e4dbb0f2SStefan Haberland break; 429f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 430f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 431f3eb5384SStefan Weinhuber data->length = reclen; /* not tlf, as one might think */ 432f3eb5384SStefan Weinhuber data->operation.operation = 0x3F; 433f3eb5384SStefan Weinhuber data->extended_operation = 0x23; 434f3eb5384SStefan Weinhuber break; 435f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ: 436f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_MT: 437f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_KD: 438f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_KD_MT: 439f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 440f3eb5384SStefan Weinhuber data->length = reclen; 441f3eb5384SStefan Weinhuber data->operation.operation = 0x06; 442f3eb5384SStefan Weinhuber break; 443f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD: 444f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD_MT: 445f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 446f3eb5384SStefan Weinhuber data->length = reclen; 447f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 448f3eb5384SStefan Weinhuber break; 449f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_COUNT: 450f3eb5384SStefan Weinhuber data->operation.operation = 0x06; 451f3eb5384SStefan Weinhuber break; 452e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_READ_TRACK: 453e4dbb0f2SStefan Haberland data->operation.orientation = 0x1; 454e4dbb0f2SStefan Haberland data->operation.operation = 0x0C; 455e4dbb0f2SStefan Haberland data->extended_parameter_length = 0; 456e4dbb0f2SStefan Haberland data->sector = 0xFF; 457e4dbb0f2SStefan Haberland break; 458f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 459f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 460f3eb5384SStefan Weinhuber data->length = tlf; 461f3eb5384SStefan Weinhuber data->operation.operation = 0x0C; 462f3eb5384SStefan Weinhuber break; 463f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_ERASE: 464f3eb5384SStefan Weinhuber data->length = reclen; 465f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 466f3eb5384SStefan Weinhuber data->operation.operation = 0x0b; 467f3eb5384SStefan Weinhuber break; 468f3eb5384SStefan Weinhuber default: 469f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, device, 470f3eb5384SStefan Weinhuber "fill LRE unknown opcode 0x%x", cmd); 471f3eb5384SStefan Weinhuber BUG(); 472f3eb5384SStefan Weinhuber } 473f3eb5384SStefan Weinhuber set_ch_t(&data->seek_addr, 474f3eb5384SStefan Weinhuber trk / private->rdc_data.trk_per_cyl, 475f3eb5384SStefan Weinhuber trk % private->rdc_data.trk_per_cyl); 476f3eb5384SStefan Weinhuber data->search_arg.cyl = data->seek_addr.cyl; 477f3eb5384SStefan Weinhuber data->search_arg.head = data->seek_addr.head; 478f3eb5384SStefan Weinhuber data->search_arg.record = rec_on_trk; 479f3eb5384SStefan Weinhuber } 480f3eb5384SStefan Weinhuber 481f3eb5384SStefan Weinhuber static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 482b44b0ab3SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 483f3eb5384SStefan Weinhuber struct dasd_device *basedev, struct dasd_device *startdev, 484f3eb5384SStefan Weinhuber unsigned char format, unsigned int rec_on_trk, int count, 485f3eb5384SStefan Weinhuber unsigned int blksize, unsigned int tlf) 4868e09f215SStefan Weinhuber { 4878e09f215SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 488f3eb5384SStefan Weinhuber struct DE_eckd_data *dedata; 489f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 490b44b0ab3SStefan Weinhuber u32 begcyl, endcyl; 491b44b0ab3SStefan Weinhuber u16 heads, beghead, endhead; 4928e09f215SStefan Weinhuber int rc = 0; 4938e09f215SStefan Weinhuber 494543691a4SSebastian Ott basepriv = basedev->private; 495543691a4SSebastian Ott startpriv = startdev->private; 496f3eb5384SStefan Weinhuber dedata = &pfxdata->define_extent; 497f3eb5384SStefan Weinhuber lredata = &pfxdata->locate_record; 4988e09f215SStefan Weinhuber 4998e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PFX; 5008e09f215SStefan Weinhuber ccw->flags = 0; 501e4dbb0f2SStefan Haberland if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) { 502e4dbb0f2SStefan Haberland ccw->count = sizeof(*pfxdata) + 2; 503e4dbb0f2SStefan Haberland ccw->cda = (__u32) __pa(pfxdata); 504e4dbb0f2SStefan Haberland memset(pfxdata, 0, sizeof(*pfxdata) + 2); 505e4dbb0f2SStefan Haberland } else { 5068e09f215SStefan Weinhuber ccw->count = sizeof(*pfxdata); 5078e09f215SStefan Weinhuber ccw->cda = (__u32) __pa(pfxdata); 5088e09f215SStefan Weinhuber memset(pfxdata, 0, sizeof(*pfxdata)); 509e4dbb0f2SStefan Haberland } 510e4dbb0f2SStefan Haberland 5118e09f215SStefan Weinhuber /* prefix data */ 512f3eb5384SStefan Weinhuber if (format > 1) { 513f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 514f3eb5384SStefan Weinhuber "PFX LRE unknown format 0x%x", format); 515f3eb5384SStefan Weinhuber BUG(); 516f3eb5384SStefan Weinhuber return -EINVAL; 517f3eb5384SStefan Weinhuber } 518f3eb5384SStefan Weinhuber pfxdata->format = format; 5194abb08c2SStefan Weinhuber pfxdata->base_address = basepriv->ned->unit_addr; 5204abb08c2SStefan Weinhuber pfxdata->base_lss = basepriv->ned->ID; 521f3eb5384SStefan Weinhuber pfxdata->validity.define_extent = 1; 5228e09f215SStefan Weinhuber 5238e09f215SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 5248e09f215SStefan Weinhuber if (startpriv->uid.type != UA_BASE_DEVICE) { 5258e09f215SStefan Weinhuber pfxdata->validity.verify_base = 1; 5268e09f215SStefan Weinhuber if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 5278e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 1; 5288e09f215SStefan Weinhuber } 5298e09f215SStefan Weinhuber 5308e09f215SStefan Weinhuber /* define extend data (mostly)*/ 5318e09f215SStefan Weinhuber switch (cmd) { 5328e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_HOME_ADDRESS: 5338e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_RECORD_ZERO: 5348e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ: 5358e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_MT: 5368e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD: 5378e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD_MT: 5388e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_KD: 5398e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_KD_MT: 540f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 541f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 542f3eb5384SStefan Weinhuber break; 5438fd57520SJan Höppner case DASD_ECKD_CCW_READ_COUNT: 5448fd57520SJan Höppner dedata->mask.perm = 0x1; 5458fd57520SJan Höppner dedata->attributes.operation = DASD_BYPASS_CACHE; 5468fd57520SJan Höppner break; 547e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_READ_TRACK: 548f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 549f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 550f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 551f3eb5384SStefan Weinhuber dedata->blk_size = 0; 5528e09f215SStefan Weinhuber break; 5538e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE: 5548e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_MT: 5558e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD: 5568e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD_MT: 557f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 558f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 5598e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 5608e09f215SStefan Weinhuber break; 5618e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD: 5628e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD_MT: 563f3eb5384SStefan Weinhuber dedata->attributes.operation = DASD_BYPASS_CACHE; 5648e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 5658e09f215SStefan Weinhuber break; 5668e09f215SStefan Weinhuber case DASD_ECKD_CCW_ERASE: 5678e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 5688e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 569f3eb5384SStefan Weinhuber dedata->mask.perm = 0x3; 570f3eb5384SStefan Weinhuber dedata->mask.auth = 0x1; 571f3eb5384SStefan Weinhuber dedata->attributes.operation = DASD_BYPASS_CACHE; 572f3eb5384SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 573f3eb5384SStefan Weinhuber break; 574e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_WRITE_FULL_TRACK: 575e4dbb0f2SStefan Haberland dedata->mask.perm = 0x03; 576e4dbb0f2SStefan Haberland dedata->attributes.operation = basepriv->attrib.operation; 577e4dbb0f2SStefan Haberland dedata->blk_size = 0; 578e4dbb0f2SStefan Haberland break; 579f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 580f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 581f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 582f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 5838e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 5848e09f215SStefan Weinhuber break; 5858e09f215SStefan Weinhuber default: 586f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 587f3eb5384SStefan Weinhuber "PFX LRE unknown opcode 0x%x", cmd); 588f3eb5384SStefan Weinhuber BUG(); 589f3eb5384SStefan Weinhuber return -EINVAL; 5908e09f215SStefan Weinhuber } 5918e09f215SStefan Weinhuber 592f3eb5384SStefan Weinhuber dedata->attributes.mode = 0x3; /* ECKD */ 5938e09f215SStefan Weinhuber 5948e09f215SStefan Weinhuber if ((basepriv->rdc_data.cu_type == 0x2105 || 5958e09f215SStefan Weinhuber basepriv->rdc_data.cu_type == 0x2107 || 5968e09f215SStefan Weinhuber basepriv->rdc_data.cu_type == 0x1750) 5978e09f215SStefan Weinhuber && !(basepriv->uses_cdl && trk < 2)) 598f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x40; /* Regular Data Format Mode */ 5998e09f215SStefan Weinhuber 600b44b0ab3SStefan Weinhuber heads = basepriv->rdc_data.trk_per_cyl; 601b44b0ab3SStefan Weinhuber begcyl = trk / heads; 602b44b0ab3SStefan Weinhuber beghead = trk % heads; 603b44b0ab3SStefan Weinhuber endcyl = totrk / heads; 604b44b0ab3SStefan Weinhuber endhead = totrk % heads; 6058e09f215SStefan Weinhuber 6068e09f215SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 607f3eb5384SStefan Weinhuber if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 608f3eb5384SStefan Weinhuber dedata->attributes.operation == DASD_SEQ_ACCESS) { 6098e09f215SStefan Weinhuber 610b44b0ab3SStefan Weinhuber if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 611b44b0ab3SStefan Weinhuber endcyl += basepriv->attrib.nr_cyl; 6128e09f215SStefan Weinhuber else 613b44b0ab3SStefan Weinhuber endcyl = (basepriv->real_cyl - 1); 6148e09f215SStefan Weinhuber } 6158e09f215SStefan Weinhuber 616f3eb5384SStefan Weinhuber set_ch_t(&dedata->beg_ext, begcyl, beghead); 617f3eb5384SStefan Weinhuber set_ch_t(&dedata->end_ext, endcyl, endhead); 618f3eb5384SStefan Weinhuber 619f3eb5384SStefan Weinhuber if (format == 1) { 620f3eb5384SStefan Weinhuber fill_LRE_data(lredata, trk, rec_on_trk, count, cmd, 621f3eb5384SStefan Weinhuber basedev, blksize, tlf); 622f3eb5384SStefan Weinhuber } 623f3eb5384SStefan Weinhuber 6248e09f215SStefan Weinhuber return rc; 6258e09f215SStefan Weinhuber } 6268e09f215SStefan Weinhuber 627f3eb5384SStefan Weinhuber static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 628f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 629f3eb5384SStefan Weinhuber struct dasd_device *basedev, struct dasd_device *startdev) 630f3eb5384SStefan Weinhuber { 631f3eb5384SStefan Weinhuber return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev, 632f3eb5384SStefan Weinhuber 0, 0, 0, 0, 0); 633f3eb5384SStefan Weinhuber } 634f3eb5384SStefan Weinhuber 6354d284cacSHeiko Carstens static void 636b44b0ab3SStefan Weinhuber locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk, 637b44b0ab3SStefan Weinhuber unsigned int rec_on_trk, int no_rec, int cmd, 6381da177e4SLinus Torvalds struct dasd_device * device, int reclen) 6391da177e4SLinus Torvalds { 640543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 6411da177e4SLinus Torvalds int sector; 6421da177e4SLinus Torvalds int dn, d; 6431da177e4SLinus Torvalds 6441da177e4SLinus Torvalds DBF_DEV_EVENT(DBF_INFO, device, 6451da177e4SLinus Torvalds "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", 6461da177e4SLinus Torvalds trk, rec_on_trk, no_rec, cmd, reclen); 6471da177e4SLinus Torvalds 6481da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; 6491da177e4SLinus Torvalds ccw->flags = 0; 6501da177e4SLinus Torvalds ccw->count = 16; 6511da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 6521da177e4SLinus Torvalds 6531da177e4SLinus Torvalds memset(data, 0, sizeof(struct LO_eckd_data)); 6541da177e4SLinus Torvalds sector = 0; 6551da177e4SLinus Torvalds if (rec_on_trk) { 6561da177e4SLinus Torvalds switch (private->rdc_data.dev_type) { 6571da177e4SLinus Torvalds case 0x3390: 6581da177e4SLinus Torvalds dn = ceil_quot(reclen + 6, 232); 6591da177e4SLinus Torvalds d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 6601da177e4SLinus Torvalds sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 6611da177e4SLinus Torvalds break; 6621da177e4SLinus Torvalds case 0x3380: 6631da177e4SLinus Torvalds d = 7 + ceil_quot(reclen + 12, 32); 6641da177e4SLinus Torvalds sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 6651da177e4SLinus Torvalds break; 6661da177e4SLinus Torvalds } 6671da177e4SLinus Torvalds } 6681da177e4SLinus Torvalds data->sector = sector; 6691da177e4SLinus Torvalds data->count = no_rec; 6701da177e4SLinus Torvalds switch (cmd) { 6711da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 6721da177e4SLinus Torvalds data->operation.orientation = 0x3; 6731da177e4SLinus Torvalds data->operation.operation = 0x03; 6741da177e4SLinus Torvalds break; 6751da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 6761da177e4SLinus Torvalds data->operation.orientation = 0x3; 6771da177e4SLinus Torvalds data->operation.operation = 0x16; 6781da177e4SLinus Torvalds break; 6791da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 6801da177e4SLinus Torvalds data->operation.orientation = 0x1; 6811da177e4SLinus Torvalds data->operation.operation = 0x03; 6821da177e4SLinus Torvalds data->count++; 6831da177e4SLinus Torvalds break; 6841da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 6851da177e4SLinus Torvalds data->operation.orientation = 0x3; 6861da177e4SLinus Torvalds data->operation.operation = 0x16; 6871da177e4SLinus Torvalds data->count++; 6881da177e4SLinus Torvalds break; 6891da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 6901da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 6911da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 6921da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 6931da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6941da177e4SLinus Torvalds data->length = reclen; 6951da177e4SLinus Torvalds data->operation.operation = 0x01; 6961da177e4SLinus Torvalds break; 6971da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 6981da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 6991da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 7001da177e4SLinus Torvalds data->length = reclen; 7011da177e4SLinus Torvalds data->operation.operation = 0x03; 7021da177e4SLinus Torvalds break; 7031da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 7041da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 7051da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 7061da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 7071da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 7081da177e4SLinus Torvalds data->length = reclen; 7091da177e4SLinus Torvalds data->operation.operation = 0x06; 7101da177e4SLinus Torvalds break; 7111da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 7121da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 7131da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 7141da177e4SLinus Torvalds data->length = reclen; 7151da177e4SLinus Torvalds data->operation.operation = 0x16; 7161da177e4SLinus Torvalds break; 7171da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_COUNT: 7181da177e4SLinus Torvalds data->operation.operation = 0x06; 7191da177e4SLinus Torvalds break; 7201da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 7211da177e4SLinus Torvalds data->length = reclen; 7221da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 7231da177e4SLinus Torvalds data->operation.operation = 0x0b; 7241da177e4SLinus Torvalds break; 7251da177e4SLinus Torvalds default: 726fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record " 727fc19f381SStefan Haberland "opcode 0x%x", cmd); 7281da177e4SLinus Torvalds } 729b44b0ab3SStefan Weinhuber set_ch_t(&data->seek_addr, 730b44b0ab3SStefan Weinhuber trk / private->rdc_data.trk_per_cyl, 731b44b0ab3SStefan Weinhuber trk % private->rdc_data.trk_per_cyl); 732b44b0ab3SStefan Weinhuber data->search_arg.cyl = data->seek_addr.cyl; 733b44b0ab3SStefan Weinhuber data->search_arg.head = data->seek_addr.head; 7341da177e4SLinus Torvalds data->search_arg.record = rec_on_trk; 7351da177e4SLinus Torvalds } 7361da177e4SLinus Torvalds 7371da177e4SLinus Torvalds /* 7381da177e4SLinus Torvalds * Returns 1 if the block is one of the special blocks that needs 7391da177e4SLinus Torvalds * to get read/written with the KD variant of the command. 7401da177e4SLinus Torvalds * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and 7411da177e4SLinus Torvalds * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. 7421da177e4SLinus Torvalds * Luckily the KD variants differ only by one bit (0x08) from the 7431da177e4SLinus Torvalds * normal variant. So don't wonder about code like: 7441da177e4SLinus Torvalds * if (dasd_eckd_cdl_special(blk_per_trk, recid)) 7451da177e4SLinus Torvalds * ccw->cmd_code |= 0x8; 7461da177e4SLinus Torvalds */ 7471da177e4SLinus Torvalds static inline int 7481da177e4SLinus Torvalds dasd_eckd_cdl_special(int blk_per_trk, int recid) 7491da177e4SLinus Torvalds { 7501da177e4SLinus Torvalds if (recid < 3) 7511da177e4SLinus Torvalds return 1; 7521da177e4SLinus Torvalds if (recid < blk_per_trk) 7531da177e4SLinus Torvalds return 0; 7541da177e4SLinus Torvalds if (recid < 2 * blk_per_trk) 7551da177e4SLinus Torvalds return 1; 7561da177e4SLinus Torvalds return 0; 7571da177e4SLinus Torvalds } 7581da177e4SLinus Torvalds 7591da177e4SLinus Torvalds /* 7601da177e4SLinus Torvalds * Returns the record size for the special blocks of the cdl format. 7611da177e4SLinus Torvalds * Only returns something useful if dasd_eckd_cdl_special is true 7621da177e4SLinus Torvalds * for the recid. 7631da177e4SLinus Torvalds */ 7641da177e4SLinus Torvalds static inline int 7651da177e4SLinus Torvalds dasd_eckd_cdl_reclen(int recid) 7661da177e4SLinus Torvalds { 7671da177e4SLinus Torvalds if (recid < 3) 7681da177e4SLinus Torvalds return sizes_trk0[recid]; 7691da177e4SLinus Torvalds return LABEL_SIZE; 7701da177e4SLinus Torvalds } 771b206181dSStefan Haberland /* create unique id from private structure. */ 772b206181dSStefan Haberland static void create_uid(struct dasd_eckd_private *private) 7733d052595SHorst Hummel { 7744abb08c2SStefan Weinhuber int count; 775b206181dSStefan Haberland struct dasd_uid *uid; 7763d052595SHorst Hummel 7772dedf0d9SStefan Haberland uid = &private->uid; 7783d052595SHorst Hummel memset(uid, 0, sizeof(struct dasd_uid)); 7794abb08c2SStefan Weinhuber memcpy(uid->vendor, private->ned->HDA_manufacturer, 7803d052595SHorst Hummel sizeof(uid->vendor) - 1); 7813d052595SHorst Hummel EBCASC(uid->vendor, sizeof(uid->vendor) - 1); 7824abb08c2SStefan Weinhuber memcpy(uid->serial, private->ned->HDA_location, 7833d052595SHorst Hummel sizeof(uid->serial) - 1); 7843d052595SHorst Hummel EBCASC(uid->serial, sizeof(uid->serial) - 1); 7854abb08c2SStefan Weinhuber uid->ssid = private->gneq->subsystemID; 786a419aef8SJoe Perches uid->real_unit_addr = private->ned->unit_addr; 7874abb08c2SStefan Weinhuber if (private->sneq) { 7884abb08c2SStefan Weinhuber uid->type = private->sneq->sua_flags; 7898e09f215SStefan Weinhuber if (uid->type == UA_BASE_PAV_ALIAS) 7904abb08c2SStefan Weinhuber uid->base_unit_addr = private->sneq->base_unit_addr; 7918e09f215SStefan Weinhuber } else { 7928e09f215SStefan Weinhuber uid->type = UA_BASE_DEVICE; 7938e09f215SStefan Weinhuber } 7944abb08c2SStefan Weinhuber if (private->vdsneq) { 7954abb08c2SStefan Weinhuber for (count = 0; count < 16; count++) { 7964abb08c2SStefan Weinhuber sprintf(uid->vduit+2*count, "%02x", 7974abb08c2SStefan Weinhuber private->vdsneq->uit[count]); 7984abb08c2SStefan Weinhuber } 7994abb08c2SStefan Weinhuber } 800b206181dSStefan Haberland } 801b206181dSStefan Haberland 802b206181dSStefan Haberland /* 803b206181dSStefan Haberland * Generate device unique id that specifies the physical device. 804b206181dSStefan Haberland */ 805b206181dSStefan Haberland static int dasd_eckd_generate_uid(struct dasd_device *device) 806b206181dSStefan Haberland { 807543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 808b206181dSStefan Haberland unsigned long flags; 809b206181dSStefan Haberland 810b206181dSStefan Haberland if (!private) 811b206181dSStefan Haberland return -ENODEV; 812b206181dSStefan Haberland if (!private->ned || !private->gneq) 813b206181dSStefan Haberland return -ENODEV; 814b206181dSStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 815b206181dSStefan Haberland create_uid(private); 8162dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 8173d052595SHorst Hummel return 0; 8183d052595SHorst Hummel } 8193d052595SHorst Hummel 8202dedf0d9SStefan Haberland static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid) 8212dedf0d9SStefan Haberland { 822543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 8232dedf0d9SStefan Haberland unsigned long flags; 8242dedf0d9SStefan Haberland 825543691a4SSebastian Ott if (private) { 8262dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 8272dedf0d9SStefan Haberland *uid = private->uid; 8282dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 8292dedf0d9SStefan Haberland return 0; 8302dedf0d9SStefan Haberland } 8312dedf0d9SStefan Haberland return -EINVAL; 8322dedf0d9SStefan Haberland } 8332dedf0d9SStefan Haberland 834b206181dSStefan Haberland /* 835b206181dSStefan Haberland * compare device UID with data of a given dasd_eckd_private structure 836b206181dSStefan Haberland * return 0 for match 837b206181dSStefan Haberland */ 838b206181dSStefan Haberland static int dasd_eckd_compare_path_uid(struct dasd_device *device, 839b206181dSStefan Haberland struct dasd_eckd_private *private) 840b206181dSStefan Haberland { 841b206181dSStefan Haberland struct dasd_uid device_uid; 842b206181dSStefan Haberland 843b206181dSStefan Haberland create_uid(private); 844b206181dSStefan Haberland dasd_eckd_get_uid(device, &device_uid); 845b206181dSStefan Haberland 846b206181dSStefan Haberland return memcmp(&device_uid, &private->uid, sizeof(struct dasd_uid)); 847b206181dSStefan Haberland } 848b206181dSStefan Haberland 849a4d26c6aSStefan Weinhuber static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device, 850a4d26c6aSStefan Weinhuber struct dasd_ccw_req *cqr, 851a4d26c6aSStefan Weinhuber __u8 *rcd_buffer, 852a4d26c6aSStefan Weinhuber __u8 lpm) 85317283b56SCornelia Huck { 85417283b56SCornelia Huck struct ccw1 *ccw; 855a4d26c6aSStefan Weinhuber /* 856a4d26c6aSStefan Weinhuber * buffer has to start with EBCDIC "V1.0" to show 857a4d26c6aSStefan Weinhuber * support for virtual device SNEQ 858a4d26c6aSStefan Weinhuber */ 859a4d26c6aSStefan Weinhuber rcd_buffer[0] = 0xE5; 860a4d26c6aSStefan Weinhuber rcd_buffer[1] = 0xF1; 861a4d26c6aSStefan Weinhuber rcd_buffer[2] = 0x4B; 862a4d26c6aSStefan Weinhuber rcd_buffer[3] = 0xF0; 86317283b56SCornelia Huck 86417283b56SCornelia Huck ccw = cqr->cpaddr; 865a4d26c6aSStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RCD; 866a4d26c6aSStefan Weinhuber ccw->flags = 0; 86717283b56SCornelia Huck ccw->cda = (__u32)(addr_t)rcd_buffer; 868a4d26c6aSStefan Weinhuber ccw->count = DASD_ECKD_RCD_DATA_SIZE; 869a4d26c6aSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 87017283b56SCornelia Huck 8718e09f215SStefan Weinhuber cqr->startdev = device; 8728e09f215SStefan Weinhuber cqr->memdev = device; 8738e09f215SStefan Weinhuber cqr->block = NULL; 87417283b56SCornelia Huck cqr->expires = 10*HZ; 87517283b56SCornelia Huck cqr->lpm = lpm; 876eb6e199bSStefan Weinhuber cqr->retries = 256; 8771aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 87817283b56SCornelia Huck cqr->status = DASD_CQR_FILLED; 879a4d26c6aSStefan Weinhuber set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 880a4d26c6aSStefan Weinhuber } 881a4d26c6aSStefan Weinhuber 8825915a873SStefan Haberland /* 8835915a873SStefan Haberland * Wakeup helper for read_conf 8845915a873SStefan Haberland * if the cqr is not done and needs some error recovery 8855915a873SStefan Haberland * the buffer has to be re-initialized with the EBCDIC "V1.0" 8865915a873SStefan Haberland * to show support for virtual device SNEQ 8875915a873SStefan Haberland */ 8885915a873SStefan Haberland static void read_conf_cb(struct dasd_ccw_req *cqr, void *data) 8895915a873SStefan Haberland { 8905915a873SStefan Haberland struct ccw1 *ccw; 8915915a873SStefan Haberland __u8 *rcd_buffer; 8925915a873SStefan Haberland 8935915a873SStefan Haberland if (cqr->status != DASD_CQR_DONE) { 8945915a873SStefan Haberland ccw = cqr->cpaddr; 8955915a873SStefan Haberland rcd_buffer = (__u8 *)((addr_t) ccw->cda); 8965915a873SStefan Haberland memset(rcd_buffer, 0, sizeof(*rcd_buffer)); 8975915a873SStefan Haberland 8985915a873SStefan Haberland rcd_buffer[0] = 0xE5; 8995915a873SStefan Haberland rcd_buffer[1] = 0xF1; 9005915a873SStefan Haberland rcd_buffer[2] = 0x4B; 9015915a873SStefan Haberland rcd_buffer[3] = 0xF0; 9025915a873SStefan Haberland } 9035915a873SStefan Haberland dasd_wakeup_cb(cqr, data); 9045915a873SStefan Haberland } 9055915a873SStefan Haberland 906a4d26c6aSStefan Weinhuber static int dasd_eckd_read_conf_immediately(struct dasd_device *device, 907a4d26c6aSStefan Weinhuber struct dasd_ccw_req *cqr, 908a4d26c6aSStefan Weinhuber __u8 *rcd_buffer, 909a4d26c6aSStefan Weinhuber __u8 lpm) 910a4d26c6aSStefan Weinhuber { 911a4d26c6aSStefan Weinhuber struct ciw *ciw; 912a4d26c6aSStefan Weinhuber int rc; 913a4d26c6aSStefan Weinhuber /* 914a4d26c6aSStefan Weinhuber * sanity check: scan for RCD command in extended SenseID data 915a4d26c6aSStefan Weinhuber * some devices do not support RCD 916a4d26c6aSStefan Weinhuber */ 917a4d26c6aSStefan Weinhuber ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 918a4d26c6aSStefan Weinhuber if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) 919a4d26c6aSStefan Weinhuber return -EOPNOTSUPP; 920a4d26c6aSStefan Weinhuber 921a4d26c6aSStefan Weinhuber dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm); 922a4d26c6aSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 9235a27e60dSStefan Weinhuber set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 924a4d26c6aSStefan Weinhuber cqr->retries = 5; 9255915a873SStefan Haberland cqr->callback = read_conf_cb; 926a4d26c6aSStefan Weinhuber rc = dasd_sleep_on_immediatly(cqr); 927a4d26c6aSStefan Weinhuber return rc; 92817283b56SCornelia Huck } 92917283b56SCornelia Huck 93017283b56SCornelia Huck static int dasd_eckd_read_conf_lpm(struct dasd_device *device, 93117283b56SCornelia Huck void **rcd_buffer, 93217283b56SCornelia Huck int *rcd_buffer_size, __u8 lpm) 93317283b56SCornelia Huck { 93417283b56SCornelia Huck struct ciw *ciw; 93517283b56SCornelia Huck char *rcd_buf = NULL; 93617283b56SCornelia Huck int ret; 93717283b56SCornelia Huck struct dasd_ccw_req *cqr; 93817283b56SCornelia Huck 93917283b56SCornelia Huck /* 940a4d26c6aSStefan Weinhuber * sanity check: scan for RCD command in extended SenseID data 941a4d26c6aSStefan Weinhuber * some devices do not support RCD 94217283b56SCornelia Huck */ 94317283b56SCornelia Huck ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 944a4d26c6aSStefan Weinhuber if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) { 94517283b56SCornelia Huck ret = -EOPNOTSUPP; 94617283b56SCornelia Huck goto out_error; 94717283b56SCornelia Huck } 948a4d26c6aSStefan Weinhuber rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA); 94917283b56SCornelia Huck if (!rcd_buf) { 95017283b56SCornelia Huck ret = -ENOMEM; 95117283b56SCornelia Huck goto out_error; 95217283b56SCornelia Huck } 953a4d26c6aSStefan Weinhuber cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, 954a4d26c6aSStefan Weinhuber 0, /* use rcd_buf as data ara */ 955a4d26c6aSStefan Weinhuber device); 95617283b56SCornelia Huck if (IS_ERR(cqr)) { 957a4d26c6aSStefan Weinhuber DBF_DEV_EVENT(DBF_WARNING, device, "%s", 958a4d26c6aSStefan Weinhuber "Could not allocate RCD request"); 959a4d26c6aSStefan Weinhuber ret = -ENOMEM; 96017283b56SCornelia Huck goto out_error; 96117283b56SCornelia Huck } 962a4d26c6aSStefan Weinhuber dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm); 9635915a873SStefan Haberland cqr->callback = read_conf_cb; 96417283b56SCornelia Huck ret = dasd_sleep_on(cqr); 96517283b56SCornelia Huck /* 96617283b56SCornelia Huck * on success we update the user input parms 96717283b56SCornelia Huck */ 9688e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 96917283b56SCornelia Huck if (ret) 97017283b56SCornelia Huck goto out_error; 97117283b56SCornelia Huck 972a4d26c6aSStefan Weinhuber *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE; 97317283b56SCornelia Huck *rcd_buffer = rcd_buf; 97417283b56SCornelia Huck return 0; 97517283b56SCornelia Huck out_error: 97617283b56SCornelia Huck kfree(rcd_buf); 97717283b56SCornelia Huck *rcd_buffer = NULL; 97817283b56SCornelia Huck *rcd_buffer_size = 0; 97917283b56SCornelia Huck return ret; 98017283b56SCornelia Huck } 98117283b56SCornelia Huck 9824abb08c2SStefan Weinhuber static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private) 9834abb08c2SStefan Weinhuber { 9844abb08c2SStefan Weinhuber 9854abb08c2SStefan Weinhuber struct dasd_sneq *sneq; 9864abb08c2SStefan Weinhuber int i, count; 9874abb08c2SStefan Weinhuber 9884abb08c2SStefan Weinhuber private->ned = NULL; 9894abb08c2SStefan Weinhuber private->sneq = NULL; 9904abb08c2SStefan Weinhuber private->vdsneq = NULL; 9914abb08c2SStefan Weinhuber private->gneq = NULL; 9924abb08c2SStefan Weinhuber count = private->conf_len / sizeof(struct dasd_sneq); 9934abb08c2SStefan Weinhuber sneq = (struct dasd_sneq *)private->conf_data; 9944abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 9954abb08c2SStefan Weinhuber if (sneq->flags.identifier == 1 && sneq->format == 1) 9964abb08c2SStefan Weinhuber private->sneq = sneq; 9974abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 1 && sneq->format == 4) 9984abb08c2SStefan Weinhuber private->vdsneq = (struct vd_sneq *)sneq; 9994abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 2) 10004abb08c2SStefan Weinhuber private->gneq = (struct dasd_gneq *)sneq; 10014abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 3 && sneq->res1 == 1) 10024abb08c2SStefan Weinhuber private->ned = (struct dasd_ned *)sneq; 10034abb08c2SStefan Weinhuber sneq++; 10044abb08c2SStefan Weinhuber } 10054abb08c2SStefan Weinhuber if (!private->ned || !private->gneq) { 10064abb08c2SStefan Weinhuber private->ned = NULL; 10074abb08c2SStefan Weinhuber private->sneq = NULL; 10084abb08c2SStefan Weinhuber private->vdsneq = NULL; 10094abb08c2SStefan Weinhuber private->gneq = NULL; 10104abb08c2SStefan Weinhuber return -EINVAL; 10114abb08c2SStefan Weinhuber } 10124abb08c2SStefan Weinhuber return 0; 10134abb08c2SStefan Weinhuber 10144abb08c2SStefan Weinhuber }; 10154abb08c2SStefan Weinhuber 10164abb08c2SStefan Weinhuber static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len) 10174abb08c2SStefan Weinhuber { 10184abb08c2SStefan Weinhuber struct dasd_gneq *gneq; 10194abb08c2SStefan Weinhuber int i, count, found; 10204abb08c2SStefan Weinhuber 10214abb08c2SStefan Weinhuber count = conf_len / sizeof(*gneq); 10224abb08c2SStefan Weinhuber gneq = (struct dasd_gneq *)conf_data; 10234abb08c2SStefan Weinhuber found = 0; 10244abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 10254abb08c2SStefan Weinhuber if (gneq->flags.identifier == 2) { 10264abb08c2SStefan Weinhuber found = 1; 10274abb08c2SStefan Weinhuber break; 10284abb08c2SStefan Weinhuber } 10294abb08c2SStefan Weinhuber gneq++; 10304abb08c2SStefan Weinhuber } 10314abb08c2SStefan Weinhuber if (found) 10324abb08c2SStefan Weinhuber return ((char *)gneq)[18] & 0x07; 10334abb08c2SStefan Weinhuber else 10344abb08c2SStefan Weinhuber return 0; 10354abb08c2SStefan Weinhuber } 10364abb08c2SStefan Weinhuber 1037c7c0c9deSStefan Haberland static void dasd_eckd_clear_conf_data(struct dasd_device *device) 1038c7c0c9deSStefan Haberland { 1039543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1040c7c0c9deSStefan Haberland int i; 1041c7c0c9deSStefan Haberland 1042c7c0c9deSStefan Haberland private->conf_data = NULL; 1043c7c0c9deSStefan Haberland private->conf_len = 0; 1044c7c0c9deSStefan Haberland for (i = 0; i < 8; i++) { 1045c9346151SStefan Haberland kfree(device->path[i].conf_data); 1046c9346151SStefan Haberland device->path[i].conf_data = NULL; 1047c7c0c9deSStefan Haberland } 1048c7c0c9deSStefan Haberland } 1049c7c0c9deSStefan Haberland 1050c7c0c9deSStefan Haberland 10514abb08c2SStefan Weinhuber static int dasd_eckd_read_conf(struct dasd_device *device) 10521da177e4SLinus Torvalds { 10531da177e4SLinus Torvalds void *conf_data; 10541da177e4SLinus Torvalds int conf_len, conf_data_saved; 1055b179b037SStefan Haberland int rc, path_err, pos; 1056a4d26c6aSStefan Weinhuber __u8 lpm, opm; 1057b206181dSStefan Haberland struct dasd_eckd_private *private, path_private; 1058b206181dSStefan Haberland struct dasd_uid *uid; 1059b206181dSStefan Haberland char print_path_uid[60], print_device_uid[60]; 10601da177e4SLinus Torvalds 1061543691a4SSebastian Ott private = device->private; 1062a4d26c6aSStefan Weinhuber opm = ccw_device_get_path_mask(device->cdev); 10631da177e4SLinus Torvalds conf_data_saved = 0; 106455d3a85cSStefan Haberland path_err = 0; 10651da177e4SLinus Torvalds /* get configuration data per operational path */ 10661da177e4SLinus Torvalds for (lpm = 0x80; lpm; lpm>>= 1) { 1067b206181dSStefan Haberland if (!(lpm & opm)) 1068b206181dSStefan Haberland continue; 106917283b56SCornelia Huck rc = dasd_eckd_read_conf_lpm(device, &conf_data, 10701da177e4SLinus Torvalds &conf_len, lpm); 10711da177e4SLinus Torvalds if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ 1072b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 10731da177e4SLinus Torvalds "Read configuration data returned " 1074b8ed5dd5SStefan Haberland "error %d", rc); 10751da177e4SLinus Torvalds return rc; 10761da177e4SLinus Torvalds } 10771da177e4SLinus Torvalds if (conf_data == NULL) { 1078b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1079b8ed5dd5SStefan Haberland "No configuration data " 1080b8ed5dd5SStefan Haberland "retrieved"); 1081a4d26c6aSStefan Weinhuber /* no further analysis possible */ 1082c9346151SStefan Haberland dasd_path_add_opm(device, opm); 1083d133a960SGabriel Craciunescu continue; /* no error */ 10841da177e4SLinus Torvalds } 10851da177e4SLinus Torvalds /* save first valid configuration data */ 10861da177e4SLinus Torvalds if (!conf_data_saved) { 1087c7c0c9deSStefan Haberland /* initially clear previously stored conf_data */ 1088c7c0c9deSStefan Haberland dasd_eckd_clear_conf_data(device); 10894abb08c2SStefan Weinhuber private->conf_data = conf_data; 10904abb08c2SStefan Weinhuber private->conf_len = conf_len; 10914abb08c2SStefan Weinhuber if (dasd_eckd_identify_conf_parts(private)) { 10924abb08c2SStefan Weinhuber private->conf_data = NULL; 10934abb08c2SStefan Weinhuber private->conf_len = 0; 10944abb08c2SStefan Weinhuber kfree(conf_data); 10954abb08c2SStefan Weinhuber continue; 10964abb08c2SStefan Weinhuber } 1097c7c0c9deSStefan Haberland pos = pathmask_to_pos(lpm); 1098c7c0c9deSStefan Haberland /* store per path conf_data */ 1099c9346151SStefan Haberland device->path[pos].conf_data = conf_data; 1100b206181dSStefan Haberland /* 1101b206181dSStefan Haberland * build device UID that other path data 1102b206181dSStefan Haberland * can be compared to it 1103b206181dSStefan Haberland */ 1104b206181dSStefan Haberland dasd_eckd_generate_uid(device); 11051da177e4SLinus Torvalds conf_data_saved++; 1106b206181dSStefan Haberland } else { 1107b206181dSStefan Haberland path_private.conf_data = conf_data; 1108b206181dSStefan Haberland path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1109b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts( 1110b206181dSStefan Haberland &path_private)) { 1111b206181dSStefan Haberland path_private.conf_data = NULL; 1112b206181dSStefan Haberland path_private.conf_len = 0; 1113b206181dSStefan Haberland kfree(conf_data); 1114b206181dSStefan Haberland continue; 1115b206181dSStefan Haberland } 1116b206181dSStefan Haberland if (dasd_eckd_compare_path_uid( 1117b206181dSStefan Haberland device, &path_private)) { 1118b206181dSStefan Haberland uid = &path_private.uid; 1119b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1120b206181dSStefan Haberland snprintf(print_path_uid, 1121b206181dSStefan Haberland sizeof(print_path_uid), 1122b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1123b206181dSStefan Haberland uid->vendor, uid->serial, 1124b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1125b206181dSStefan Haberland uid->vduit); 1126b206181dSStefan Haberland else 1127b206181dSStefan Haberland snprintf(print_path_uid, 1128b206181dSStefan Haberland sizeof(print_path_uid), 1129b206181dSStefan Haberland "%s.%s.%04x.%02x", 1130b206181dSStefan Haberland uid->vendor, uid->serial, 1131b206181dSStefan Haberland uid->ssid, 1132b206181dSStefan Haberland uid->real_unit_addr); 1133b206181dSStefan Haberland uid = &private->uid; 1134b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1135b206181dSStefan Haberland snprintf(print_device_uid, 1136b206181dSStefan Haberland sizeof(print_device_uid), 1137b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1138b206181dSStefan Haberland uid->vendor, uid->serial, 1139b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1140b206181dSStefan Haberland uid->vduit); 1141b206181dSStefan Haberland else 1142b206181dSStefan Haberland snprintf(print_device_uid, 1143b206181dSStefan Haberland sizeof(print_device_uid), 1144b206181dSStefan Haberland "%s.%s.%04x.%02x", 1145b206181dSStefan Haberland uid->vendor, uid->serial, 1146b206181dSStefan Haberland uid->ssid, 1147b206181dSStefan Haberland uid->real_unit_addr); 1148b206181dSStefan Haberland dev_err(&device->cdev->dev, 1149b206181dSStefan Haberland "Not all channel paths lead to " 1150b206181dSStefan Haberland "the same device, path %02X leads to " 1151b206181dSStefan Haberland "device %s instead of %s\n", lpm, 1152b206181dSStefan Haberland print_path_uid, print_device_uid); 115355d3a85cSStefan Haberland path_err = -EINVAL; 1154c9346151SStefan Haberland dasd_path_add_cablepm(device, lpm); 115555d3a85cSStefan Haberland continue; 1156b206181dSStefan Haberland } 1157c7c0c9deSStefan Haberland pos = pathmask_to_pos(lpm); 1158c7c0c9deSStefan Haberland /* store per path conf_data */ 1159c9346151SStefan Haberland device->path[pos].conf_data = conf_data; 1160b206181dSStefan Haberland path_private.conf_data = NULL; 1161b206181dSStefan Haberland path_private.conf_len = 0; 11621da177e4SLinus Torvalds } 11634abb08c2SStefan Weinhuber switch (dasd_eckd_path_access(conf_data, conf_len)) { 11641da177e4SLinus Torvalds case 0x02: 1165c9346151SStefan Haberland dasd_path_add_nppm(device, lpm); 11661da177e4SLinus Torvalds break; 11671da177e4SLinus Torvalds case 0x03: 1168c9346151SStefan Haberland dasd_path_add_ppm(device, lpm); 11691da177e4SLinus Torvalds break; 11701da177e4SLinus Torvalds } 1171c9346151SStefan Haberland if (!dasd_path_get_opm(device)) { 1172c9346151SStefan Haberland dasd_path_set_opm(device, lpm); 1173ccc0e7dcSStefan Haberland dasd_generic_path_operational(device); 1174ccc0e7dcSStefan Haberland } else { 1175c9346151SStefan Haberland dasd_path_add_opm(device, lpm); 1176ccc0e7dcSStefan Haberland } 11771da177e4SLinus Torvalds } 1178b206181dSStefan Haberland 117955d3a85cSStefan Haberland return path_err; 11801da177e4SLinus Torvalds } 11811da177e4SLinus Torvalds 1182a4d26c6aSStefan Weinhuber static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm) 1183a4d26c6aSStefan Weinhuber { 1184543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1185a4d26c6aSStefan Weinhuber int mdc; 1186a4d26c6aSStefan Weinhuber u32 fcx_max_data; 1187a4d26c6aSStefan Weinhuber 1188a4d26c6aSStefan Weinhuber if (private->fcx_max_data) { 1189a4d26c6aSStefan Weinhuber mdc = ccw_device_get_mdc(device->cdev, lpm); 1190a4d26c6aSStefan Weinhuber if ((mdc < 0)) { 1191a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1192a4d26c6aSStefan Weinhuber "Detecting the maximum data size for zHPF " 1193a4d26c6aSStefan Weinhuber "requests failed (rc=%d) for a new path %x\n", 1194a4d26c6aSStefan Weinhuber mdc, lpm); 1195a4d26c6aSStefan Weinhuber return mdc; 1196a4d26c6aSStefan Weinhuber } 11970f02c4e7SChristian Borntraeger fcx_max_data = (u32)mdc * FCX_MAX_DATA_FACTOR; 1198a4d26c6aSStefan Weinhuber if (fcx_max_data < private->fcx_max_data) { 1199a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1200a4d26c6aSStefan Weinhuber "The maximum data size for zHPF requests %u " 1201a4d26c6aSStefan Weinhuber "on a new path %x is below the active maximum " 1202a4d26c6aSStefan Weinhuber "%u\n", fcx_max_data, lpm, 1203a4d26c6aSStefan Weinhuber private->fcx_max_data); 1204a4d26c6aSStefan Weinhuber return -EACCES; 1205a4d26c6aSStefan Weinhuber } 1206a4d26c6aSStefan Weinhuber } 1207a4d26c6aSStefan Weinhuber return 0; 1208a4d26c6aSStefan Weinhuber } 1209a4d26c6aSStefan Weinhuber 1210b206181dSStefan Haberland static int rebuild_device_uid(struct dasd_device *device, 1211b206181dSStefan Haberland struct path_verification_work_data *data) 1212b206181dSStefan Haberland { 1213543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1214c9346151SStefan Haberland __u8 lpm, opm = dasd_path_get_opm(device); 1215543691a4SSebastian Ott int rc = -ENODEV; 1216b206181dSStefan Haberland 1217b206181dSStefan Haberland for (lpm = 0x80; lpm; lpm >>= 1) { 1218b206181dSStefan Haberland if (!(lpm & opm)) 1219b206181dSStefan Haberland continue; 1220b206181dSStefan Haberland memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1221b206181dSStefan Haberland memset(&data->cqr, 0, sizeof(data->cqr)); 1222b206181dSStefan Haberland data->cqr.cpaddr = &data->ccw; 1223b206181dSStefan Haberland rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1224b206181dSStefan Haberland data->rcd_buffer, 1225b206181dSStefan Haberland lpm); 1226b206181dSStefan Haberland 1227b206181dSStefan Haberland if (rc) { 1228b206181dSStefan Haberland if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */ 1229b206181dSStefan Haberland continue; 1230b206181dSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1231b206181dSStefan Haberland "Read configuration data " 1232b206181dSStefan Haberland "returned error %d", rc); 1233b206181dSStefan Haberland break; 1234b206181dSStefan Haberland } 1235b206181dSStefan Haberland memcpy(private->conf_data, data->rcd_buffer, 1236b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE); 1237b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts(private)) { 1238b206181dSStefan Haberland rc = -ENODEV; 1239b206181dSStefan Haberland } else /* first valid path is enough */ 1240b206181dSStefan Haberland break; 1241b206181dSStefan Haberland } 1242b206181dSStefan Haberland 1243b206181dSStefan Haberland if (!rc) 1244b206181dSStefan Haberland rc = dasd_eckd_generate_uid(device); 1245b206181dSStefan Haberland 1246b206181dSStefan Haberland return rc; 1247b206181dSStefan Haberland } 1248b206181dSStefan Haberland 1249a4d26c6aSStefan Weinhuber static void do_path_verification_work(struct work_struct *work) 1250a4d26c6aSStefan Weinhuber { 1251a4d26c6aSStefan Weinhuber struct path_verification_work_data *data; 1252a4d26c6aSStefan Weinhuber struct dasd_device *device; 1253b206181dSStefan Haberland struct dasd_eckd_private path_private; 1254b206181dSStefan Haberland struct dasd_uid *uid; 1255b206181dSStefan Haberland __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE]; 12565db8440cSStefan Haberland __u8 lpm, opm, npm, ppm, epm, hpfpm, cablepm; 1257a4d26c6aSStefan Weinhuber unsigned long flags; 1258b206181dSStefan Haberland char print_uid[60]; 1259a4d26c6aSStefan Weinhuber int rc; 1260a4d26c6aSStefan Weinhuber 1261a4d26c6aSStefan Weinhuber data = container_of(work, struct path_verification_work_data, worker); 1262a4d26c6aSStefan Weinhuber device = data->device; 1263a4d26c6aSStefan Weinhuber 1264c8d1c0ffSStefan Haberland /* delay path verification until device was resumed */ 1265c8d1c0ffSStefan Haberland if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 1266c8d1c0ffSStefan Haberland schedule_work(work); 1267c8d1c0ffSStefan Haberland return; 1268c8d1c0ffSStefan Haberland } 12691eb38023SStefan Haberland /* check if path verification already running and delay if so */ 12701eb38023SStefan Haberland if (test_and_set_bit(DASD_FLAG_PATH_VERIFY, &device->flags)) { 12711eb38023SStefan Haberland schedule_work(work); 12721eb38023SStefan Haberland return; 12731eb38023SStefan Haberland } 1274a4d26c6aSStefan Weinhuber opm = 0; 1275a4d26c6aSStefan Weinhuber npm = 0; 1276a4d26c6aSStefan Weinhuber ppm = 0; 1277a4d26c6aSStefan Weinhuber epm = 0; 12785db8440cSStefan Haberland hpfpm = 0; 12795db8440cSStefan Haberland cablepm = 0; 12805db8440cSStefan Haberland 1281a4d26c6aSStefan Weinhuber for (lpm = 0x80; lpm; lpm >>= 1) { 1282b206181dSStefan Haberland if (!(lpm & data->tbvpm)) 1283b206181dSStefan Haberland continue; 1284b206181dSStefan Haberland memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1285a4d26c6aSStefan Weinhuber memset(&data->cqr, 0, sizeof(data->cqr)); 1286a4d26c6aSStefan Weinhuber data->cqr.cpaddr = &data->ccw; 1287a4d26c6aSStefan Weinhuber rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1288a4d26c6aSStefan Weinhuber data->rcd_buffer, 1289a4d26c6aSStefan Weinhuber lpm); 1290a4d26c6aSStefan Weinhuber if (!rc) { 1291a4d26c6aSStefan Weinhuber switch (dasd_eckd_path_access(data->rcd_buffer, 1292b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE) 1293b206181dSStefan Haberland ) { 1294a4d26c6aSStefan Weinhuber case 0x02: 1295a4d26c6aSStefan Weinhuber npm |= lpm; 1296a4d26c6aSStefan Weinhuber break; 1297a4d26c6aSStefan Weinhuber case 0x03: 1298a4d26c6aSStefan Weinhuber ppm |= lpm; 1299a4d26c6aSStefan Weinhuber break; 1300a4d26c6aSStefan Weinhuber } 1301a4d26c6aSStefan Weinhuber opm |= lpm; 1302a4d26c6aSStefan Weinhuber } else if (rc == -EOPNOTSUPP) { 1303a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1304a4d26c6aSStefan Weinhuber "path verification: No configuration " 1305a4d26c6aSStefan Weinhuber "data retrieved"); 1306a4d26c6aSStefan Weinhuber opm |= lpm; 1307a4d26c6aSStefan Weinhuber } else if (rc == -EAGAIN) { 1308a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1309a4d26c6aSStefan Weinhuber "path verification: device is stopped," 1310a4d26c6aSStefan Weinhuber " try again later"); 1311a4d26c6aSStefan Weinhuber epm |= lpm; 1312a4d26c6aSStefan Weinhuber } else { 1313a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1314a4d26c6aSStefan Weinhuber "Reading device feature codes failed " 1315a4d26c6aSStefan Weinhuber "(rc=%d) for new path %x\n", rc, lpm); 1316a4d26c6aSStefan Weinhuber continue; 1317a4d26c6aSStefan Weinhuber } 1318a4d26c6aSStefan Weinhuber if (verify_fcx_max_data(device, lpm)) { 1319a4d26c6aSStefan Weinhuber opm &= ~lpm; 1320a4d26c6aSStefan Weinhuber npm &= ~lpm; 1321a4d26c6aSStefan Weinhuber ppm &= ~lpm; 13225db8440cSStefan Haberland hpfpm |= lpm; 1323b206181dSStefan Haberland continue; 1324b206181dSStefan Haberland } 1325b206181dSStefan Haberland 1326b206181dSStefan Haberland /* 1327b206181dSStefan Haberland * save conf_data for comparison after 1328b206181dSStefan Haberland * rebuild_device_uid may have changed 1329b206181dSStefan Haberland * the original data 1330b206181dSStefan Haberland */ 1331b206181dSStefan Haberland memcpy(&path_rcd_buf, data->rcd_buffer, 1332b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE); 1333b206181dSStefan Haberland path_private.conf_data = (void *) &path_rcd_buf; 1334b206181dSStefan Haberland path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1335b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts(&path_private)) { 1336b206181dSStefan Haberland path_private.conf_data = NULL; 1337b206181dSStefan Haberland path_private.conf_len = 0; 1338b206181dSStefan Haberland continue; 1339b206181dSStefan Haberland } 1340b206181dSStefan Haberland 1341b206181dSStefan Haberland /* 1342b206181dSStefan Haberland * compare path UID with device UID only if at least 1343b206181dSStefan Haberland * one valid path is left 1344b206181dSStefan Haberland * in other case the device UID may have changed and 1345b206181dSStefan Haberland * the first working path UID will be used as device UID 1346b206181dSStefan Haberland */ 1347c9346151SStefan Haberland if (dasd_path_get_opm(device) && 1348b206181dSStefan Haberland dasd_eckd_compare_path_uid(device, &path_private)) { 1349b206181dSStefan Haberland /* 1350b206181dSStefan Haberland * the comparison was not successful 1351b206181dSStefan Haberland * rebuild the device UID with at least one 1352b206181dSStefan Haberland * known path in case a z/VM hyperswap command 1353b206181dSStefan Haberland * has changed the device 1354b206181dSStefan Haberland * 1355b206181dSStefan Haberland * after this compare again 1356b206181dSStefan Haberland * 1357b206181dSStefan Haberland * if either the rebuild or the recompare fails 1358b206181dSStefan Haberland * the path can not be used 1359b206181dSStefan Haberland */ 1360b206181dSStefan Haberland if (rebuild_device_uid(device, data) || 1361b206181dSStefan Haberland dasd_eckd_compare_path_uid( 1362b206181dSStefan Haberland device, &path_private)) { 1363b206181dSStefan Haberland uid = &path_private.uid; 1364b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1365b206181dSStefan Haberland snprintf(print_uid, sizeof(print_uid), 1366b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1367b206181dSStefan Haberland uid->vendor, uid->serial, 1368b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1369b206181dSStefan Haberland uid->vduit); 1370b206181dSStefan Haberland else 1371b206181dSStefan Haberland snprintf(print_uid, sizeof(print_uid), 1372b206181dSStefan Haberland "%s.%s.%04x.%02x", 1373b206181dSStefan Haberland uid->vendor, uid->serial, 1374b206181dSStefan Haberland uid->ssid, 1375b206181dSStefan Haberland uid->real_unit_addr); 1376b206181dSStefan Haberland dev_err(&device->cdev->dev, 1377b206181dSStefan Haberland "The newly added channel path %02X " 1378b206181dSStefan Haberland "will not be used because it leads " 1379b206181dSStefan Haberland "to a different device %s\n", 1380b206181dSStefan Haberland lpm, print_uid); 1381b206181dSStefan Haberland opm &= ~lpm; 1382b206181dSStefan Haberland npm &= ~lpm; 1383b206181dSStefan Haberland ppm &= ~lpm; 13845db8440cSStefan Haberland cablepm |= lpm; 1385b206181dSStefan Haberland continue; 1386a4d26c6aSStefan Weinhuber } 1387a4d26c6aSStefan Weinhuber } 1388b206181dSStefan Haberland 1389a4d26c6aSStefan Weinhuber /* 1390a4d26c6aSStefan Weinhuber * There is a small chance that a path is lost again between 1391a4d26c6aSStefan Weinhuber * above path verification and the following modification of 1392a4d26c6aSStefan Weinhuber * the device opm mask. We could avoid that race here by using 1393a4d26c6aSStefan Weinhuber * yet another path mask, but we rather deal with this unlikely 1394a4d26c6aSStefan Weinhuber * situation in dasd_start_IO. 1395a4d26c6aSStefan Weinhuber */ 1396a4d26c6aSStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1397c9346151SStefan Haberland if (!dasd_path_get_opm(device) && opm) { 1398c9346151SStefan Haberland dasd_path_set_opm(device, opm); 1399a4d26c6aSStefan Weinhuber dasd_generic_path_operational(device); 14005db8440cSStefan Haberland } else { 1401c9346151SStefan Haberland dasd_path_add_opm(device, opm); 14025db8440cSStefan Haberland } 1403c9346151SStefan Haberland dasd_path_add_nppm(device, npm); 1404c9346151SStefan Haberland dasd_path_add_ppm(device, ppm); 1405c9346151SStefan Haberland dasd_path_add_tbvpm(device, epm); 1406c9346151SStefan Haberland dasd_path_add_cablepm(device, cablepm); 1407c9346151SStefan Haberland dasd_path_add_nohpfpm(device, hpfpm); 1408a4d26c6aSStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1409b206181dSStefan Haberland } 14101eb38023SStefan Haberland clear_bit(DASD_FLAG_PATH_VERIFY, &device->flags); 1411a4d26c6aSStefan Weinhuber dasd_put_device(device); 1412a4d26c6aSStefan Weinhuber if (data->isglobal) 1413a4d26c6aSStefan Weinhuber mutex_unlock(&dasd_path_verification_mutex); 1414a4d26c6aSStefan Weinhuber else 1415a4d26c6aSStefan Weinhuber kfree(data); 1416a4d26c6aSStefan Weinhuber } 1417a4d26c6aSStefan Weinhuber 1418a4d26c6aSStefan Weinhuber static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm) 1419a4d26c6aSStefan Weinhuber { 1420a4d26c6aSStefan Weinhuber struct path_verification_work_data *data; 1421a4d26c6aSStefan Weinhuber 1422a4d26c6aSStefan Weinhuber data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA); 1423a4d26c6aSStefan Weinhuber if (!data) { 1424a4d26c6aSStefan Weinhuber if (mutex_trylock(&dasd_path_verification_mutex)) { 1425a4d26c6aSStefan Weinhuber data = path_verification_worker; 1426a4d26c6aSStefan Weinhuber data->isglobal = 1; 1427a4d26c6aSStefan Weinhuber } else 1428a4d26c6aSStefan Weinhuber return -ENOMEM; 1429a4d26c6aSStefan Weinhuber } else { 1430a4d26c6aSStefan Weinhuber memset(data, 0, sizeof(*data)); 1431a4d26c6aSStefan Weinhuber data->isglobal = 0; 1432a4d26c6aSStefan Weinhuber } 1433a4d26c6aSStefan Weinhuber INIT_WORK(&data->worker, do_path_verification_work); 1434a4d26c6aSStefan Weinhuber dasd_get_device(device); 1435a4d26c6aSStefan Weinhuber data->device = device; 1436a4d26c6aSStefan Weinhuber data->tbvpm = lpm; 1437a4d26c6aSStefan Weinhuber schedule_work(&data->worker); 1438a4d26c6aSStefan Weinhuber return 0; 1439a4d26c6aSStefan Weinhuber } 1440a4d26c6aSStefan Weinhuber 14418e09f215SStefan Weinhuber static int dasd_eckd_read_features(struct dasd_device *device) 14428e09f215SStefan Weinhuber { 1443543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 14448e09f215SStefan Weinhuber struct dasd_psf_prssd_data *prssdp; 14458e09f215SStefan Weinhuber struct dasd_rssd_features *features; 14468e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 14478e09f215SStefan Weinhuber struct ccw1 *ccw; 14488e09f215SStefan Weinhuber int rc; 14498e09f215SStefan Weinhuber 145068d1e5f0SStefan Weinhuber memset(&private->features, 0, sizeof(struct dasd_rssd_features)); 145168b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 14528e09f215SStefan Weinhuber (sizeof(struct dasd_psf_prssd_data) + 14538e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)), 14548e09f215SStefan Weinhuber device); 14558e09f215SStefan Weinhuber if (IS_ERR(cqr)) { 1456b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " 1457b8ed5dd5SStefan Haberland "allocate initialization request"); 14588e09f215SStefan Weinhuber return PTR_ERR(cqr); 14598e09f215SStefan Weinhuber } 14608e09f215SStefan Weinhuber cqr->startdev = device; 14618e09f215SStefan Weinhuber cqr->memdev = device; 14628e09f215SStefan Weinhuber cqr->block = NULL; 1463eb6e199bSStefan Weinhuber cqr->retries = 256; 14648e09f215SStefan Weinhuber cqr->expires = 10 * HZ; 14658e09f215SStefan Weinhuber 14668e09f215SStefan Weinhuber /* Prepare for Read Subsystem Data */ 14678e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 14688e09f215SStefan Weinhuber memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 14698e09f215SStefan Weinhuber prssdp->order = PSF_ORDER_PRSSD; 14708e09f215SStefan Weinhuber prssdp->suborder = 0x41; /* Read Feature Codes */ 14718e09f215SStefan Weinhuber /* all other bytes of prssdp must be zero */ 14728e09f215SStefan Weinhuber 14738e09f215SStefan Weinhuber ccw = cqr->cpaddr; 14748e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PSF; 14758e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_psf_prssd_data); 14768e09f215SStefan Weinhuber ccw->flags |= CCW_FLAG_CC; 14778e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) prssdp; 14788e09f215SStefan Weinhuber 14798e09f215SStefan Weinhuber /* Read Subsystem Data - feature codes */ 14808e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 14818e09f215SStefan Weinhuber memset(features, 0, sizeof(struct dasd_rssd_features)); 14828e09f215SStefan Weinhuber 14838e09f215SStefan Weinhuber ccw++; 14848e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RSSD; 14858e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_rssd_features); 14868e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) features; 14878e09f215SStefan Weinhuber 14881aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 14898e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 14908e09f215SStefan Weinhuber rc = dasd_sleep_on(cqr); 14918e09f215SStefan Weinhuber if (rc == 0) { 14928e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 14938e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 14948e09f215SStefan Weinhuber memcpy(&private->features, features, 14958e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)); 149668d1e5f0SStefan Weinhuber } else 149768d1e5f0SStefan Weinhuber dev_warn(&device->cdev->dev, "Reading device feature codes" 149868d1e5f0SStefan Weinhuber " failed with rc=%d\n", rc); 14998e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 15008e09f215SStefan Weinhuber return rc; 15018e09f215SStefan Weinhuber } 15028e09f215SStefan Weinhuber 15038e09f215SStefan Weinhuber 15043d052595SHorst Hummel /* 150540545573SHorst Hummel * Build CP for Perform Subsystem Function - SSC. 150640545573SHorst Hummel */ 1507f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, 1508f3eb5384SStefan Weinhuber int enable_pav) 150940545573SHorst Hummel { 151040545573SHorst Hummel struct dasd_ccw_req *cqr; 151140545573SHorst Hummel struct dasd_psf_ssc_data *psf_ssc_data; 151240545573SHorst Hummel struct ccw1 *ccw; 151340545573SHorst Hummel 151468b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 151540545573SHorst Hummel sizeof(struct dasd_psf_ssc_data), 151640545573SHorst Hummel device); 151740545573SHorst Hummel 151840545573SHorst Hummel if (IS_ERR(cqr)) { 1519fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 152040545573SHorst Hummel "Could not allocate PSF-SSC request"); 152140545573SHorst Hummel return cqr; 152240545573SHorst Hummel } 152340545573SHorst Hummel psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 152440545573SHorst Hummel psf_ssc_data->order = PSF_ORDER_SSC; 1525626350b6SStefan Weinhuber psf_ssc_data->suborder = 0xc0; 1526f3eb5384SStefan Weinhuber if (enable_pav) { 1527626350b6SStefan Weinhuber psf_ssc_data->suborder |= 0x08; 15288e09f215SStefan Weinhuber psf_ssc_data->reserved[0] = 0x88; 1529f3eb5384SStefan Weinhuber } 153040545573SHorst Hummel ccw = cqr->cpaddr; 153140545573SHorst Hummel ccw->cmd_code = DASD_ECKD_CCW_PSF; 153240545573SHorst Hummel ccw->cda = (__u32)(addr_t)psf_ssc_data; 153340545573SHorst Hummel ccw->count = 66; 153440545573SHorst Hummel 15358e09f215SStefan Weinhuber cqr->startdev = device; 15368e09f215SStefan Weinhuber cqr->memdev = device; 15378e09f215SStefan Weinhuber cqr->block = NULL; 1538eb6e199bSStefan Weinhuber cqr->retries = 256; 153940545573SHorst Hummel cqr->expires = 10*HZ; 15401aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 154140545573SHorst Hummel cqr->status = DASD_CQR_FILLED; 154240545573SHorst Hummel return cqr; 154340545573SHorst Hummel } 154440545573SHorst Hummel 154540545573SHorst Hummel /* 154640545573SHorst Hummel * Perform Subsystem Function. 154740545573SHorst Hummel * It is necessary to trigger CIO for channel revalidation since this 154840545573SHorst Hummel * call might change behaviour of DASD devices. 154940545573SHorst Hummel */ 155040545573SHorst Hummel static int 155112d7b107SStefan Haberland dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav, 155212d7b107SStefan Haberland unsigned long flags) 155340545573SHorst Hummel { 155440545573SHorst Hummel struct dasd_ccw_req *cqr; 155540545573SHorst Hummel int rc; 155640545573SHorst Hummel 1557f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_psf_ssc(device, enable_pav); 155840545573SHorst Hummel if (IS_ERR(cqr)) 155940545573SHorst Hummel return PTR_ERR(cqr); 156040545573SHorst Hummel 156112d7b107SStefan Haberland /* 156212d7b107SStefan Haberland * set flags e.g. turn on failfast, to prevent blocking 156312d7b107SStefan Haberland * the calling function should handle failed requests 156412d7b107SStefan Haberland */ 156512d7b107SStefan Haberland cqr->flags |= flags; 156612d7b107SStefan Haberland 156740545573SHorst Hummel rc = dasd_sleep_on(cqr); 156840545573SHorst Hummel if (!rc) 156940545573SHorst Hummel /* trigger CIO to reprobe devices */ 157040545573SHorst Hummel css_schedule_reprobe(); 157112d7b107SStefan Haberland else if (cqr->intrc == -EAGAIN) 157212d7b107SStefan Haberland rc = -EAGAIN; 157312d7b107SStefan Haberland 15748e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 157540545573SHorst Hummel return rc; 157640545573SHorst Hummel } 157740545573SHorst Hummel 157840545573SHorst Hummel /* 157940545573SHorst Hummel * Valide storage server of current device. 158040545573SHorst Hummel */ 158112d7b107SStefan Haberland static int dasd_eckd_validate_server(struct dasd_device *device, 158212d7b107SStefan Haberland unsigned long flags) 158340545573SHorst Hummel { 1584543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1585543691a4SSebastian Ott int enable_pav, rc; 158640545573SHorst Hummel 1587f9f8d02fSStefan Haberland if (private->uid.type == UA_BASE_PAV_ALIAS || 1588f9f8d02fSStefan Haberland private->uid.type == UA_HYPER_PAV_ALIAS) 158912d7b107SStefan Haberland return 0; 159040545573SHorst Hummel if (dasd_nopav || MACHINE_IS_VM) 1591f3eb5384SStefan Weinhuber enable_pav = 0; 1592f3eb5384SStefan Weinhuber else 1593f3eb5384SStefan Weinhuber enable_pav = 1; 159412d7b107SStefan Haberland rc = dasd_eckd_psf_ssc(device, enable_pav, flags); 1595eb6e199bSStefan Weinhuber 159640545573SHorst Hummel /* may be requested feature is not available on server, 159740545573SHorst Hummel * therefore just report error and go ahead */ 1598b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " 1599b8ed5dd5SStefan Haberland "returned rc=%d", private->uid.ssid, rc); 160012d7b107SStefan Haberland return rc; 160140545573SHorst Hummel } 160240545573SHorst Hummel 1603f1633031SStefan Haberland /* 1604f1633031SStefan Haberland * worker to do a validate server in case of a lost pathgroup 1605f1633031SStefan Haberland */ 1606f1633031SStefan Haberland static void dasd_eckd_do_validate_server(struct work_struct *work) 1607f1633031SStefan Haberland { 1608f1633031SStefan Haberland struct dasd_device *device = container_of(work, struct dasd_device, 1609f1633031SStefan Haberland kick_validate); 1610ea4da6eaSStefan Haberland unsigned long flags = 0; 1611ea4da6eaSStefan Haberland 1612ea4da6eaSStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &flags); 1613ea4da6eaSStefan Haberland if (dasd_eckd_validate_server(device, flags) 161412d7b107SStefan Haberland == -EAGAIN) { 161512d7b107SStefan Haberland /* schedule worker again if failed */ 161612d7b107SStefan Haberland schedule_work(&device->kick_validate); 161712d7b107SStefan Haberland return; 161812d7b107SStefan Haberland } 161912d7b107SStefan Haberland 1620f1633031SStefan Haberland dasd_put_device(device); 1621f1633031SStefan Haberland } 1622f1633031SStefan Haberland 1623f1633031SStefan Haberland static void dasd_eckd_kick_validate_server(struct dasd_device *device) 1624f1633031SStefan Haberland { 1625f1633031SStefan Haberland dasd_get_device(device); 162625e2cf1cSStefan Haberland /* exit if device not online or in offline processing */ 162725e2cf1cSStefan Haberland if (test_bit(DASD_FLAG_OFFLINE, &device->flags) || 162825e2cf1cSStefan Haberland device->state < DASD_STATE_ONLINE) { 162925e2cf1cSStefan Haberland dasd_put_device(device); 163025e2cf1cSStefan Haberland return; 163125e2cf1cSStefan Haberland } 1632f1633031SStefan Haberland /* queue call to do_validate_server to the kernel event daemon. */ 1633f2608cd4SStefan Haberland if (!schedule_work(&device->kick_validate)) 1634f2608cd4SStefan Haberland dasd_put_device(device); 1635f1633031SStefan Haberland } 1636f1633031SStefan Haberland 1637ef19298bSStefan Weinhuber static u32 get_fcx_max_data(struct dasd_device *device) 1638ef19298bSStefan Weinhuber { 1639543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1640ef19298bSStefan Weinhuber int fcx_in_css, fcx_in_gneq, fcx_in_features; 1641543691a4SSebastian Ott int tpm, mdc; 1642ef19298bSStefan Weinhuber 1643ef19298bSStefan Weinhuber if (dasd_nofcx) 1644ef19298bSStefan Weinhuber return 0; 1645ef19298bSStefan Weinhuber /* is transport mode supported? */ 1646ef19298bSStefan Weinhuber fcx_in_css = css_general_characteristics.fcx; 1647ef19298bSStefan Weinhuber fcx_in_gneq = private->gneq->reserved2[7] & 0x04; 1648ef19298bSStefan Weinhuber fcx_in_features = private->features.feature[40] & 0x80; 1649ef19298bSStefan Weinhuber tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; 1650ef19298bSStefan Weinhuber 1651ef19298bSStefan Weinhuber if (!tpm) 1652ef19298bSStefan Weinhuber return 0; 1653ef19298bSStefan Weinhuber 1654ef19298bSStefan Weinhuber mdc = ccw_device_get_mdc(device->cdev, 0); 1655ef19298bSStefan Weinhuber if (mdc < 0) { 1656ef19298bSStefan Weinhuber dev_warn(&device->cdev->dev, "Detecting the maximum supported" 1657ef19298bSStefan Weinhuber " data size for zHPF requests failed\n"); 1658ef19298bSStefan Weinhuber return 0; 1659ef19298bSStefan Weinhuber } else 16600f02c4e7SChristian Borntraeger return (u32)mdc * FCX_MAX_DATA_FACTOR; 1661ef19298bSStefan Weinhuber } 1662ef19298bSStefan Weinhuber 166340545573SHorst Hummel /* 16643d052595SHorst Hummel * Check device characteristics. 16653d052595SHorst Hummel * If the device is accessible using ECKD discipline, the device is enabled. 16663d052595SHorst Hummel */ 16671da177e4SLinus Torvalds static int 16681da177e4SLinus Torvalds dasd_eckd_check_characteristics(struct dasd_device *device) 16691da177e4SLinus Torvalds { 1670543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 16718e09f215SStefan Weinhuber struct dasd_block *block; 16722dedf0d9SStefan Haberland struct dasd_uid temp_uid; 1673f9f8d02fSStefan Haberland int rc, i; 167433b62a30SStefan Weinhuber int readonly; 16757c8faa86SStefan Haberland unsigned long value; 16761da177e4SLinus Torvalds 1677f1633031SStefan Haberland /* setup work queue for validate server*/ 1678f1633031SStefan Haberland INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server); 167959a9ed5fSStefan Haberland /* setup work queue for summary unit check */ 168059a9ed5fSStefan Haberland INIT_WORK(&device->suc_work, dasd_alias_handle_summary_unit_check); 1681f1633031SStefan Haberland 1682454e1fa1SPeter Oberparleiter if (!ccw_device_is_pathgroup(device->cdev)) { 1683454e1fa1SPeter Oberparleiter dev_warn(&device->cdev->dev, 1684454e1fa1SPeter Oberparleiter "A channel path group could not be established\n"); 1685454e1fa1SPeter Oberparleiter return -EIO; 1686454e1fa1SPeter Oberparleiter } 1687454e1fa1SPeter Oberparleiter if (!ccw_device_is_multipath(device->cdev)) { 1688454e1fa1SPeter Oberparleiter dev_info(&device->cdev->dev, 1689454e1fa1SPeter Oberparleiter "The DASD is not operating in multipath mode\n"); 1690454e1fa1SPeter Oberparleiter } 169192636b15SSebastian Ott if (!private) { 169292636b15SSebastian Ott private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); 169392636b15SSebastian Ott if (!private) { 1694fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1695fc19f381SStefan Haberland "Allocating memory for private DASD data " 1696fc19f381SStefan Haberland "failed\n"); 16971da177e4SLinus Torvalds return -ENOMEM; 16981da177e4SLinus Torvalds } 1699543691a4SSebastian Ott device->private = private; 170092636b15SSebastian Ott } else { 170192636b15SSebastian Ott memset(private, 0, sizeof(*private)); 17021da177e4SLinus Torvalds } 17031da177e4SLinus Torvalds /* Invalidate status of initial analysis. */ 17041da177e4SLinus Torvalds private->init_cqr_status = -1; 17051da177e4SLinus Torvalds /* Set default cache operations. */ 17061da177e4SLinus Torvalds private->attrib.operation = DASD_NORMAL_CACHE; 17071da177e4SLinus Torvalds private->attrib.nr_cyl = 0; 17081da177e4SLinus Torvalds 170940545573SHorst Hummel /* Read Configuration Data */ 171040545573SHorst Hummel rc = dasd_eckd_read_conf(device); 171140545573SHorst Hummel if (rc) 17128e09f215SStefan Weinhuber goto out_err1; 171340545573SHorst Hummel 17147c8faa86SStefan Haberland /* set default timeout */ 17157c8faa86SStefan Haberland device->default_expires = DASD_EXPIRES; 17161f1ee9adSHannes Reinecke /* set default retry count */ 17171f1ee9adSHannes Reinecke device->default_retries = DASD_RETRIES; 17181f1ee9adSHannes Reinecke 17197c8faa86SStefan Haberland if (private->gneq) { 17207c8faa86SStefan Haberland value = 1; 17217c8faa86SStefan Haberland for (i = 0; i < private->gneq->timeout.value; i++) 17227c8faa86SStefan Haberland value = 10 * value; 17237c8faa86SStefan Haberland value = value * private->gneq->timeout.number; 17247c8faa86SStefan Haberland /* do not accept useless values */ 17257c8faa86SStefan Haberland if (value != 0 && value <= DASD_EXPIRES_MAX) 17267c8faa86SStefan Haberland device->default_expires = value; 17277c8faa86SStefan Haberland } 17287c8faa86SStefan Haberland 17292dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 17302dedf0d9SStefan Haberland if (temp_uid.type == UA_BASE_DEVICE) { 17318e09f215SStefan Weinhuber block = dasd_alloc_block(); 17328e09f215SStefan Weinhuber if (IS_ERR(block)) { 1733b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1734b8ed5dd5SStefan Haberland "could not allocate dasd " 1735b8ed5dd5SStefan Haberland "block structure"); 17368e09f215SStefan Weinhuber rc = PTR_ERR(block); 17378e09f215SStefan Weinhuber goto out_err1; 17388e09f215SStefan Weinhuber } 17398e09f215SStefan Weinhuber device->block = block; 17408e09f215SStefan Weinhuber block->base = device; 17418e09f215SStefan Weinhuber } 17428e09f215SStefan Weinhuber 1743f9f8d02fSStefan Haberland /* register lcu with alias handling, enable PAV */ 1744f9f8d02fSStefan Haberland rc = dasd_alias_make_device_known_to_lcu(device); 1745f9f8d02fSStefan Haberland if (rc) 17468e09f215SStefan Weinhuber goto out_err2; 1747f9f8d02fSStefan Haberland 174812d7b107SStefan Haberland dasd_eckd_validate_server(device, 0); 1749f4ac1d02SStefan Weinhuber 1750f4ac1d02SStefan Weinhuber /* device may report different configuration data after LCU setup */ 1751f4ac1d02SStefan Weinhuber rc = dasd_eckd_read_conf(device); 175240545573SHorst Hummel if (rc) 17538e09f215SStefan Weinhuber goto out_err3; 17548e09f215SStefan Weinhuber 17558e09f215SStefan Weinhuber /* Read Feature Codes */ 175668d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 175740545573SHorst Hummel 17581da177e4SLinus Torvalds /* Read Device Characteristics */ 175968b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 176068b781feSStefan Haberland &private->rdc_data, 64); 17618e09f215SStefan Weinhuber if (rc) { 1762b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1763b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 17648e09f215SStefan Weinhuber goto out_err3; 17658e09f215SStefan Weinhuber } 176634cd551aSStefan Haberland 176734cd551aSStefan Haberland if ((device->features & DASD_FEATURE_USERAW) && 176834cd551aSStefan Haberland !(private->rdc_data.facilities.RT_in_LR)) { 176934cd551aSStefan Haberland dev_err(&device->cdev->dev, "The storage server does not " 177034cd551aSStefan Haberland "support raw-track access\n"); 177134cd551aSStefan Haberland rc = -EINVAL; 177234cd551aSStefan Haberland goto out_err3; 177334cd551aSStefan Haberland } 177434cd551aSStefan Haberland 1775817f2c84SNikanth Karthikesan /* find the valid cylinder size */ 1776b44b0ab3SStefan Weinhuber if (private->rdc_data.no_cyl == LV_COMPAT_CYL && 1777b44b0ab3SStefan Weinhuber private->rdc_data.long_no_cyl) 1778b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.long_no_cyl; 1779b44b0ab3SStefan Weinhuber else 1780b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.no_cyl; 1781b44b0ab3SStefan Weinhuber 1782ef19298bSStefan Weinhuber private->fcx_max_data = get_fcx_max_data(device); 1783ef19298bSStefan Weinhuber 178433b62a30SStefan Weinhuber readonly = dasd_device_is_ro(device); 178533b62a30SStefan Weinhuber if (readonly) 178633b62a30SStefan Weinhuber set_bit(DASD_FLAG_DEVICE_RO, &device->flags); 178733b62a30SStefan Weinhuber 1788fc19f381SStefan Haberland dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " 178933b62a30SStefan Weinhuber "with %d cylinders, %d heads, %d sectors%s\n", 17901da177e4SLinus Torvalds private->rdc_data.dev_type, 17911da177e4SLinus Torvalds private->rdc_data.dev_model, 17921da177e4SLinus Torvalds private->rdc_data.cu_type, 17931da177e4SLinus Torvalds private->rdc_data.cu_model.model, 1794b44b0ab3SStefan Weinhuber private->real_cyl, 17951da177e4SLinus Torvalds private->rdc_data.trk_per_cyl, 179633b62a30SStefan Weinhuber private->rdc_data.sec_per_trk, 179733b62a30SStefan Weinhuber readonly ? ", read-only device" : ""); 17988e09f215SStefan Weinhuber return 0; 17998e09f215SStefan Weinhuber 18008e09f215SStefan Weinhuber out_err3: 18018e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 18028e09f215SStefan Weinhuber out_err2: 18038e09f215SStefan Weinhuber dasd_free_block(device->block); 18048e09f215SStefan Weinhuber device->block = NULL; 18058e09f215SStefan Weinhuber out_err1: 18064abb08c2SStefan Weinhuber kfree(private->conf_data); 18078e09f215SStefan Weinhuber kfree(device->private); 18088e09f215SStefan Weinhuber device->private = NULL; 18093d052595SHorst Hummel return rc; 18101da177e4SLinus Torvalds } 18111da177e4SLinus Torvalds 18128e09f215SStefan Weinhuber static void dasd_eckd_uncheck_device(struct dasd_device *device) 18138e09f215SStefan Weinhuber { 1814543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1815b179b037SStefan Haberland int i; 18164abb08c2SStefan Weinhuber 18178e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 18184abb08c2SStefan Weinhuber private->ned = NULL; 18194abb08c2SStefan Weinhuber private->sneq = NULL; 18204abb08c2SStefan Weinhuber private->vdsneq = NULL; 18214abb08c2SStefan Weinhuber private->gneq = NULL; 18224abb08c2SStefan Weinhuber private->conf_len = 0; 1823b179b037SStefan Haberland for (i = 0; i < 8; i++) { 1824c9346151SStefan Haberland kfree(device->path[i].conf_data); 1825c9346151SStefan Haberland if ((__u8 *)device->path[i].conf_data == 1826b179b037SStefan Haberland private->conf_data) { 1827b179b037SStefan Haberland private->conf_data = NULL; 1828b179b037SStefan Haberland private->conf_len = 0; 1829b179b037SStefan Haberland } 1830c9346151SStefan Haberland device->path[i].conf_data = NULL; 1831b179b037SStefan Haberland } 18324abb08c2SStefan Weinhuber kfree(private->conf_data); 18334abb08c2SStefan Weinhuber private->conf_data = NULL; 18348e09f215SStefan Weinhuber } 18358e09f215SStefan Weinhuber 18361da177e4SLinus Torvalds static struct dasd_ccw_req * 18371da177e4SLinus Torvalds dasd_eckd_analysis_ccw(struct dasd_device *device) 18381da177e4SLinus Torvalds { 1839543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 18401da177e4SLinus Torvalds struct eckd_count *count_data; 18411da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 18421da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 18431da177e4SLinus Torvalds struct ccw1 *ccw; 18441da177e4SLinus Torvalds int cplength, datasize; 18451da177e4SLinus Torvalds int i; 18461da177e4SLinus Torvalds 18471da177e4SLinus Torvalds cplength = 8; 18481da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 184968b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 18501da177e4SLinus Torvalds if (IS_ERR(cqr)) 18511da177e4SLinus Torvalds return cqr; 18521da177e4SLinus Torvalds ccw = cqr->cpaddr; 18531da177e4SLinus Torvalds /* Define extent for the first 3 tracks. */ 18541da177e4SLinus Torvalds define_extent(ccw++, cqr->data, 0, 2, 18551da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device); 18561da177e4SLinus Torvalds LO_data = cqr->data + sizeof(struct DE_eckd_data); 18571da177e4SLinus Torvalds /* Locate record for the first 4 records on track 0. */ 18581da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18591da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 0, 0, 4, 18601da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 18611da177e4SLinus Torvalds 18621da177e4SLinus Torvalds count_data = private->count_area; 18631da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 18641da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18651da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 18661da177e4SLinus Torvalds ccw->flags = 0; 18671da177e4SLinus Torvalds ccw->count = 8; 18681da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 18691da177e4SLinus Torvalds ccw++; 18701da177e4SLinus Torvalds count_data++; 18711da177e4SLinus Torvalds } 18721da177e4SLinus Torvalds 18731da177e4SLinus Torvalds /* Locate record for the first record on track 2. */ 18741da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18751da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 2, 0, 1, 18761da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 18771da177e4SLinus Torvalds /* Read count ccw. */ 18781da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18791da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 18801da177e4SLinus Torvalds ccw->flags = 0; 18811da177e4SLinus Torvalds ccw->count = 8; 18821da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 18831da177e4SLinus Torvalds 18848e09f215SStefan Weinhuber cqr->block = NULL; 18858e09f215SStefan Weinhuber cqr->startdev = device; 18868e09f215SStefan Weinhuber cqr->memdev = device; 1887eb6e199bSStefan Weinhuber cqr->retries = 255; 18881aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 18891da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 18901da177e4SLinus Torvalds return cqr; 18911da177e4SLinus Torvalds } 18921da177e4SLinus Torvalds 1893eb6e199bSStefan Weinhuber /* differentiate between 'no record found' and any other error */ 1894eb6e199bSStefan Weinhuber static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) 1895eb6e199bSStefan Weinhuber { 1896eb6e199bSStefan Weinhuber char *sense; 1897eb6e199bSStefan Weinhuber if (init_cqr->status == DASD_CQR_DONE) 1898eb6e199bSStefan Weinhuber return INIT_CQR_OK; 1899eb6e199bSStefan Weinhuber else if (init_cqr->status == DASD_CQR_NEED_ERP || 1900eb6e199bSStefan Weinhuber init_cqr->status == DASD_CQR_FAILED) { 1901eb6e199bSStefan Weinhuber sense = dasd_get_sense(&init_cqr->irb); 1902eb6e199bSStefan Weinhuber if (sense && (sense[1] & SNS1_NO_REC_FOUND)) 1903eb6e199bSStefan Weinhuber return INIT_CQR_UNFORMATTED; 1904eb6e199bSStefan Weinhuber else 1905eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 1906eb6e199bSStefan Weinhuber } else 1907eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 1908eb6e199bSStefan Weinhuber } 1909eb6e199bSStefan Weinhuber 19101da177e4SLinus Torvalds /* 19111da177e4SLinus Torvalds * This is the callback function for the init_analysis cqr. It saves 19121da177e4SLinus Torvalds * the status of the initial analysis ccw before it frees it and kicks 19131da177e4SLinus Torvalds * the device to continue the startup sequence. This will call 19141da177e4SLinus Torvalds * dasd_eckd_do_analysis again (if the devices has not been marked 19151da177e4SLinus Torvalds * for deletion in the meantime). 19161da177e4SLinus Torvalds */ 1917eb6e199bSStefan Weinhuber static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, 1918eb6e199bSStefan Weinhuber void *data) 19191da177e4SLinus Torvalds { 1920543691a4SSebastian Ott struct dasd_device *device = init_cqr->startdev; 1921543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 19221da177e4SLinus Torvalds 1923eb6e199bSStefan Weinhuber private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); 19241da177e4SLinus Torvalds dasd_sfree_request(init_cqr, device); 19251da177e4SLinus Torvalds dasd_kick_device(device); 19261da177e4SLinus Torvalds } 19271da177e4SLinus Torvalds 1928eb6e199bSStefan Weinhuber static int dasd_eckd_start_analysis(struct dasd_block *block) 19291da177e4SLinus Torvalds { 19301da177e4SLinus Torvalds struct dasd_ccw_req *init_cqr; 19311da177e4SLinus Torvalds 19328e09f215SStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(block->base); 19331da177e4SLinus Torvalds if (IS_ERR(init_cqr)) 19341da177e4SLinus Torvalds return PTR_ERR(init_cqr); 19351da177e4SLinus Torvalds init_cqr->callback = dasd_eckd_analysis_callback; 19361da177e4SLinus Torvalds init_cqr->callback_data = NULL; 19371da177e4SLinus Torvalds init_cqr->expires = 5*HZ; 1938eb6e199bSStefan Weinhuber /* first try without ERP, so we can later handle unformatted 1939eb6e199bSStefan Weinhuber * devices as special case 1940eb6e199bSStefan Weinhuber */ 1941eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); 1942eb6e199bSStefan Weinhuber init_cqr->retries = 0; 19431da177e4SLinus Torvalds dasd_add_request_head(init_cqr); 19441da177e4SLinus Torvalds return -EAGAIN; 19451da177e4SLinus Torvalds } 19461da177e4SLinus Torvalds 1947eb6e199bSStefan Weinhuber static int dasd_eckd_end_analysis(struct dasd_block *block) 19481da177e4SLinus Torvalds { 1949543691a4SSebastian Ott struct dasd_device *device = block->base; 1950543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 19511da177e4SLinus Torvalds struct eckd_count *count_area; 19521da177e4SLinus Torvalds unsigned int sb, blk_per_trk; 19531da177e4SLinus Torvalds int status, i; 1954eb6e199bSStefan Weinhuber struct dasd_ccw_req *init_cqr; 19551da177e4SLinus Torvalds 19561da177e4SLinus Torvalds status = private->init_cqr_status; 19571da177e4SLinus Torvalds private->init_cqr_status = -1; 1958eb6e199bSStefan Weinhuber if (status == INIT_CQR_ERROR) { 1959eb6e199bSStefan Weinhuber /* try again, this time with full ERP */ 1960eb6e199bSStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(device); 1961eb6e199bSStefan Weinhuber dasd_sleep_on(init_cqr); 1962eb6e199bSStefan Weinhuber status = dasd_eckd_analysis_evaluation(init_cqr); 1963eb6e199bSStefan Weinhuber dasd_sfree_request(init_cqr, device); 1964eb6e199bSStefan Weinhuber } 1965eb6e199bSStefan Weinhuber 1966e4dbb0f2SStefan Haberland if (device->features & DASD_FEATURE_USERAW) { 1967e4dbb0f2SStefan Haberland block->bp_block = DASD_RAW_BLOCKSIZE; 1968e4dbb0f2SStefan Haberland blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; 1969e4dbb0f2SStefan Haberland block->s2b_shift = 3; 1970e4dbb0f2SStefan Haberland goto raw; 1971e4dbb0f2SStefan Haberland } 1972e4dbb0f2SStefan Haberland 1973eb6e199bSStefan Weinhuber if (status == INIT_CQR_UNFORMATTED) { 1974eb6e199bSStefan Weinhuber dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); 19751da177e4SLinus Torvalds return -EMEDIUMTYPE; 1976eb6e199bSStefan Weinhuber } else if (status == INIT_CQR_ERROR) { 1977eb6e199bSStefan Weinhuber dev_err(&device->cdev->dev, 1978eb6e199bSStefan Weinhuber "Detecting the DASD disk layout failed because " 1979eb6e199bSStefan Weinhuber "of an I/O error\n"); 1980eb6e199bSStefan Weinhuber return -EIO; 19811da177e4SLinus Torvalds } 19821da177e4SLinus Torvalds 19831da177e4SLinus Torvalds private->uses_cdl = 1; 19841da177e4SLinus Torvalds /* Check Track 0 for Compatible Disk Layout */ 19851da177e4SLinus Torvalds count_area = NULL; 19861da177e4SLinus Torvalds for (i = 0; i < 3; i++) { 19871da177e4SLinus Torvalds if (private->count_area[i].kl != 4 || 19883bc9fef9SStefan Haberland private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 || 19893bc9fef9SStefan Haberland private->count_area[i].cyl != 0 || 19903bc9fef9SStefan Haberland private->count_area[i].head != count_area_head[i] || 19913bc9fef9SStefan Haberland private->count_area[i].record != count_area_rec[i]) { 19921da177e4SLinus Torvalds private->uses_cdl = 0; 19931da177e4SLinus Torvalds break; 19941da177e4SLinus Torvalds } 19951da177e4SLinus Torvalds } 19961da177e4SLinus Torvalds if (i == 3) 19971da177e4SLinus Torvalds count_area = &private->count_area[4]; 19981da177e4SLinus Torvalds 19991da177e4SLinus Torvalds if (private->uses_cdl == 0) { 20001da177e4SLinus Torvalds for (i = 0; i < 5; i++) { 20011da177e4SLinus Torvalds if ((private->count_area[i].kl != 0) || 20021da177e4SLinus Torvalds (private->count_area[i].dl != 20033bc9fef9SStefan Haberland private->count_area[0].dl) || 20043bc9fef9SStefan Haberland private->count_area[i].cyl != 0 || 20053bc9fef9SStefan Haberland private->count_area[i].head != count_area_head[i] || 20063bc9fef9SStefan Haberland private->count_area[i].record != count_area_rec[i]) 20071da177e4SLinus Torvalds break; 20081da177e4SLinus Torvalds } 20091da177e4SLinus Torvalds if (i == 5) 20101da177e4SLinus Torvalds count_area = &private->count_area[0]; 20111da177e4SLinus Torvalds } else { 20121da177e4SLinus Torvalds if (private->count_area[3].record == 1) 2013fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 2014fc19f381SStefan Haberland "Track 0 has no records following the VTOC\n"); 20151da177e4SLinus Torvalds } 2016e4dbb0f2SStefan Haberland 20171da177e4SLinus Torvalds if (count_area != NULL && count_area->kl == 0) { 20181da177e4SLinus Torvalds /* we found notthing violating our disk layout */ 20191da177e4SLinus Torvalds if (dasd_check_blocksize(count_area->dl) == 0) 20208e09f215SStefan Weinhuber block->bp_block = count_area->dl; 20211da177e4SLinus Torvalds } 20228e09f215SStefan Weinhuber if (block->bp_block == 0) { 2023fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 2024fc19f381SStefan Haberland "The disk layout of the DASD is not supported\n"); 20251da177e4SLinus Torvalds return -EMEDIUMTYPE; 20261da177e4SLinus Torvalds } 20278e09f215SStefan Weinhuber block->s2b_shift = 0; /* bits to shift 512 to get a block */ 20288e09f215SStefan Weinhuber for (sb = 512; sb < block->bp_block; sb = sb << 1) 20298e09f215SStefan Weinhuber block->s2b_shift++; 20301da177e4SLinus Torvalds 20318e09f215SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 2032e4dbb0f2SStefan Haberland 2033e4dbb0f2SStefan Haberland raw: 2034b44b0ab3SStefan Weinhuber block->blocks = (private->real_cyl * 20351da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 20361da177e4SLinus Torvalds blk_per_trk); 20371da177e4SLinus Torvalds 2038fc19f381SStefan Haberland dev_info(&device->cdev->dev, 2039fc19f381SStefan Haberland "DASD with %d KB/block, %d KB total size, %d KB/track, " 2040fc19f381SStefan Haberland "%s\n", (block->bp_block >> 10), 2041b44b0ab3SStefan Weinhuber ((private->real_cyl * 20421da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 20438e09f215SStefan Weinhuber blk_per_trk * (block->bp_block >> 9)) >> 1), 20448e09f215SStefan Weinhuber ((blk_per_trk * block->bp_block) >> 10), 20451da177e4SLinus Torvalds private->uses_cdl ? 20461da177e4SLinus Torvalds "compatible disk layout" : "linux disk layout"); 20471da177e4SLinus Torvalds 20481da177e4SLinus Torvalds return 0; 20491da177e4SLinus Torvalds } 20501da177e4SLinus Torvalds 20518e09f215SStefan Weinhuber static int dasd_eckd_do_analysis(struct dasd_block *block) 20521da177e4SLinus Torvalds { 2053543691a4SSebastian Ott struct dasd_eckd_private *private = block->base->private; 20541da177e4SLinus Torvalds 20551da177e4SLinus Torvalds if (private->init_cqr_status < 0) 20568e09f215SStefan Weinhuber return dasd_eckd_start_analysis(block); 20571da177e4SLinus Torvalds else 20588e09f215SStefan Weinhuber return dasd_eckd_end_analysis(block); 20591da177e4SLinus Torvalds } 20601da177e4SLinus Torvalds 2061d42e1712SStefan Haberland static int dasd_eckd_basic_to_ready(struct dasd_device *device) 20628e09f215SStefan Weinhuber { 20638e09f215SStefan Weinhuber return dasd_alias_add_device(device); 20648e09f215SStefan Weinhuber }; 20658e09f215SStefan Weinhuber 20668e09f215SStefan Weinhuber static int dasd_eckd_online_to_ready(struct dasd_device *device) 20678e09f215SStefan Weinhuber { 2068501183f2SStefan Haberland cancel_work_sync(&device->reload_device); 206925e2cf1cSStefan Haberland cancel_work_sync(&device->kick_validate); 2070d42e1712SStefan Haberland return 0; 2071d42e1712SStefan Haberland }; 2072d42e1712SStefan Haberland 2073daa991bfSStefan Haberland static int dasd_eckd_basic_to_known(struct dasd_device *device) 2074d42e1712SStefan Haberland { 20758e09f215SStefan Weinhuber return dasd_alias_remove_device(device); 20768e09f215SStefan Weinhuber }; 20778e09f215SStefan Weinhuber 20781da177e4SLinus Torvalds static int 20798e09f215SStefan Weinhuber dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 20801da177e4SLinus Torvalds { 2081543691a4SSebastian Ott struct dasd_eckd_private *private = block->base->private; 20821da177e4SLinus Torvalds 20838e09f215SStefan Weinhuber if (dasd_check_blocksize(block->bp_block) == 0) { 20841da177e4SLinus Torvalds geo->sectors = recs_per_track(&private->rdc_data, 20858e09f215SStefan Weinhuber 0, block->bp_block); 20861da177e4SLinus Torvalds } 20871da177e4SLinus Torvalds geo->cylinders = private->rdc_data.no_cyl; 20881da177e4SLinus Torvalds geo->heads = private->rdc_data.trk_per_cyl; 20891da177e4SLinus Torvalds return 0; 20901da177e4SLinus Torvalds } 20911da177e4SLinus Torvalds 20928fd57520SJan Höppner /* 20938fd57520SJan Höppner * Build the TCW request for the format check 20948fd57520SJan Höppner */ 20958fd57520SJan Höppner static struct dasd_ccw_req * 20968fd57520SJan Höppner dasd_eckd_build_check_tcw(struct dasd_device *base, struct format_data_t *fdata, 20978fd57520SJan Höppner int enable_pav, struct eckd_count *fmt_buffer, 20988fd57520SJan Höppner int rpt) 20998fd57520SJan Höppner { 21008fd57520SJan Höppner struct dasd_eckd_private *start_priv; 21018fd57520SJan Höppner struct dasd_device *startdev = NULL; 21028fd57520SJan Höppner struct tidaw *last_tidaw = NULL; 21038fd57520SJan Höppner struct dasd_ccw_req *cqr; 21048fd57520SJan Höppner struct itcw *itcw; 21058fd57520SJan Höppner int itcw_size; 21068fd57520SJan Höppner int count; 21078fd57520SJan Höppner int rc; 21088fd57520SJan Höppner int i; 21098fd57520SJan Höppner 21108fd57520SJan Höppner if (enable_pav) 21118fd57520SJan Höppner startdev = dasd_alias_get_start_dev(base); 21128fd57520SJan Höppner 21138fd57520SJan Höppner if (!startdev) 21148fd57520SJan Höppner startdev = base; 21158fd57520SJan Höppner 21168fd57520SJan Höppner start_priv = startdev->private; 21178fd57520SJan Höppner 21188fd57520SJan Höppner count = rpt * (fdata->stop_unit - fdata->start_unit + 1); 21198fd57520SJan Höppner 21208fd57520SJan Höppner /* 21218fd57520SJan Höppner * we're adding 'count' amount of tidaw to the itcw. 21228fd57520SJan Höppner * calculate the corresponding itcw_size 21238fd57520SJan Höppner */ 21248fd57520SJan Höppner itcw_size = itcw_calc_size(0, count, 0); 21258fd57520SJan Höppner 21268fd57520SJan Höppner cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 21278fd57520SJan Höppner if (IS_ERR(cqr)) 21288fd57520SJan Höppner return cqr; 21298fd57520SJan Höppner 21308fd57520SJan Höppner start_priv->count++; 21318fd57520SJan Höppner 21328fd57520SJan Höppner itcw = itcw_init(cqr->data, itcw_size, ITCW_OP_READ, 0, count, 0); 21338fd57520SJan Höppner if (IS_ERR(itcw)) { 21348fd57520SJan Höppner rc = -EINVAL; 21358fd57520SJan Höppner goto out_err; 21368fd57520SJan Höppner } 21378fd57520SJan Höppner 21388fd57520SJan Höppner cqr->cpaddr = itcw_get_tcw(itcw); 21398fd57520SJan Höppner rc = prepare_itcw(itcw, fdata->start_unit, fdata->stop_unit, 21408fd57520SJan Höppner DASD_ECKD_CCW_READ_COUNT_MT, base, startdev, 0, count, 21418fd57520SJan Höppner sizeof(struct eckd_count), 21428fd57520SJan Höppner count * sizeof(struct eckd_count), 0, rpt); 21438fd57520SJan Höppner if (rc) 21448fd57520SJan Höppner goto out_err; 21458fd57520SJan Höppner 21468fd57520SJan Höppner for (i = 0; i < count; i++) { 21478fd57520SJan Höppner last_tidaw = itcw_add_tidaw(itcw, 0, fmt_buffer++, 21488fd57520SJan Höppner sizeof(struct eckd_count)); 21498fd57520SJan Höppner if (IS_ERR(last_tidaw)) { 21508fd57520SJan Höppner rc = -EINVAL; 21518fd57520SJan Höppner goto out_err; 21528fd57520SJan Höppner } 21538fd57520SJan Höppner } 21548fd57520SJan Höppner 21558fd57520SJan Höppner last_tidaw->flags |= TIDAW_FLAGS_LAST; 21568fd57520SJan Höppner itcw_finalize(itcw); 21578fd57520SJan Höppner 21588fd57520SJan Höppner cqr->cpmode = 1; 21598fd57520SJan Höppner cqr->startdev = startdev; 21608fd57520SJan Höppner cqr->memdev = startdev; 21618fd57520SJan Höppner cqr->basedev = base; 21628fd57520SJan Höppner cqr->retries = startdev->default_retries; 21638fd57520SJan Höppner cqr->expires = startdev->default_expires * HZ; 21648fd57520SJan Höppner cqr->buildclk = get_tod_clock(); 21658fd57520SJan Höppner cqr->status = DASD_CQR_FILLED; 21668fd57520SJan Höppner /* Set flags to suppress output for expected errors */ 21678fd57520SJan Höppner set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); 21688fd57520SJan Höppner set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); 21698fd57520SJan Höppner 21708fd57520SJan Höppner return cqr; 21718fd57520SJan Höppner 21728fd57520SJan Höppner out_err: 21738fd57520SJan Höppner dasd_sfree_request(cqr, startdev); 21748fd57520SJan Höppner 21758fd57520SJan Höppner return ERR_PTR(rc); 21768fd57520SJan Höppner } 21778fd57520SJan Höppner 21788fd57520SJan Höppner /* 21798fd57520SJan Höppner * Build the CCW request for the format check 21808fd57520SJan Höppner */ 21818fd57520SJan Höppner static struct dasd_ccw_req * 21828fd57520SJan Höppner dasd_eckd_build_check(struct dasd_device *base, struct format_data_t *fdata, 21838fd57520SJan Höppner int enable_pav, struct eckd_count *fmt_buffer, int rpt) 21848fd57520SJan Höppner { 21858fd57520SJan Höppner struct dasd_eckd_private *start_priv; 21868fd57520SJan Höppner struct dasd_eckd_private *base_priv; 21878fd57520SJan Höppner struct dasd_device *startdev = NULL; 21888fd57520SJan Höppner struct dasd_ccw_req *cqr; 21898fd57520SJan Höppner struct ccw1 *ccw; 21908fd57520SJan Höppner void *data; 21918fd57520SJan Höppner int cplength, datasize; 21928fd57520SJan Höppner int use_prefix; 21938fd57520SJan Höppner int count; 21948fd57520SJan Höppner int i; 21958fd57520SJan Höppner 21968fd57520SJan Höppner if (enable_pav) 21978fd57520SJan Höppner startdev = dasd_alias_get_start_dev(base); 21988fd57520SJan Höppner 21998fd57520SJan Höppner if (!startdev) 22008fd57520SJan Höppner startdev = base; 22018fd57520SJan Höppner 22028fd57520SJan Höppner start_priv = startdev->private; 22038fd57520SJan Höppner base_priv = base->private; 22048fd57520SJan Höppner 22058fd57520SJan Höppner count = rpt * (fdata->stop_unit - fdata->start_unit + 1); 22068fd57520SJan Höppner 22078fd57520SJan Höppner use_prefix = base_priv->features.feature[8] & 0x01; 22088fd57520SJan Höppner 22098fd57520SJan Höppner if (use_prefix) { 22108fd57520SJan Höppner cplength = 1; 22118fd57520SJan Höppner datasize = sizeof(struct PFX_eckd_data); 22128fd57520SJan Höppner } else { 22138fd57520SJan Höppner cplength = 2; 22148fd57520SJan Höppner datasize = sizeof(struct DE_eckd_data) + 22158fd57520SJan Höppner sizeof(struct LO_eckd_data); 22168fd57520SJan Höppner } 22178fd57520SJan Höppner cplength += count; 22188fd57520SJan Höppner 22198fd57520SJan Höppner cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 22208fd57520SJan Höppner startdev); 22218fd57520SJan Höppner if (IS_ERR(cqr)) 22228fd57520SJan Höppner return cqr; 22238fd57520SJan Höppner 22248fd57520SJan Höppner start_priv->count++; 22258fd57520SJan Höppner data = cqr->data; 22268fd57520SJan Höppner ccw = cqr->cpaddr; 22278fd57520SJan Höppner 22288fd57520SJan Höppner if (use_prefix) { 22298fd57520SJan Höppner prefix_LRE(ccw++, data, fdata->start_unit, fdata->stop_unit, 22308fd57520SJan Höppner DASD_ECKD_CCW_READ_COUNT, base, startdev, 1, 0, 22318fd57520SJan Höppner count, 0, 0); 22328fd57520SJan Höppner } else { 22338fd57520SJan Höppner define_extent(ccw++, data, fdata->start_unit, fdata->stop_unit, 22348fd57520SJan Höppner DASD_ECKD_CCW_READ_COUNT, startdev); 22358fd57520SJan Höppner 22368fd57520SJan Höppner data += sizeof(struct DE_eckd_data); 22378fd57520SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 22388fd57520SJan Höppner 22398fd57520SJan Höppner locate_record(ccw++, data, fdata->start_unit, 0, count, 22408fd57520SJan Höppner DASD_ECKD_CCW_READ_COUNT, base, 0); 22418fd57520SJan Höppner } 22428fd57520SJan Höppner 22438fd57520SJan Höppner for (i = 0; i < count; i++) { 22448fd57520SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 22458fd57520SJan Höppner ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 22468fd57520SJan Höppner ccw->flags = CCW_FLAG_SLI; 22478fd57520SJan Höppner ccw->count = 8; 22488fd57520SJan Höppner ccw->cda = (__u32)(addr_t) fmt_buffer; 22498fd57520SJan Höppner ccw++; 22508fd57520SJan Höppner fmt_buffer++; 22518fd57520SJan Höppner } 22528fd57520SJan Höppner 22538fd57520SJan Höppner cqr->startdev = startdev; 22548fd57520SJan Höppner cqr->memdev = startdev; 22558fd57520SJan Höppner cqr->basedev = base; 22568fd57520SJan Höppner cqr->retries = DASD_RETRIES; 22578fd57520SJan Höppner cqr->expires = startdev->default_expires * HZ; 22588fd57520SJan Höppner cqr->buildclk = get_tod_clock(); 22598fd57520SJan Höppner cqr->status = DASD_CQR_FILLED; 22608fd57520SJan Höppner /* Set flags to suppress output for expected errors */ 22618fd57520SJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 22628fd57520SJan Höppner 22638fd57520SJan Höppner return cqr; 22648fd57520SJan Höppner } 22658fd57520SJan Höppner 22661da177e4SLinus Torvalds static struct dasd_ccw_req * 2267d42e1712SStefan Haberland dasd_eckd_build_format(struct dasd_device *base, 226829b8dd9dSStefan Haberland struct format_data_t *fdata, 2269a94fa154SStefan Haberland int enable_pav) 22701da177e4SLinus Torvalds { 2271d42e1712SStefan Haberland struct dasd_eckd_private *base_priv; 2272d42e1712SStefan Haberland struct dasd_eckd_private *start_priv; 227329b8dd9dSStefan Haberland struct dasd_device *startdev = NULL; 22741da177e4SLinus Torvalds struct dasd_ccw_req *fcp; 22751da177e4SLinus Torvalds struct eckd_count *ect; 2276d42e1712SStefan Haberland struct ch_t address; 22771da177e4SLinus Torvalds struct ccw1 *ccw; 22781da177e4SLinus Torvalds void *data; 2279b44b0ab3SStefan Weinhuber int rpt; 22801da177e4SLinus Torvalds int cplength, datasize; 2281d42e1712SStefan Haberland int i, j; 2282f9a28f7bSJean-Baptiste Joret int intensity = 0; 2283f9a28f7bSJean-Baptiste Joret int r0_perm; 2284d42e1712SStefan Haberland int nr_tracks; 228518d6624eSStefan Haberland int use_prefix; 22861da177e4SLinus Torvalds 2287a94fa154SStefan Haberland if (enable_pav) 2288d42e1712SStefan Haberland startdev = dasd_alias_get_start_dev(base); 228929b8dd9dSStefan Haberland 2290d42e1712SStefan Haberland if (!startdev) 2291d42e1712SStefan Haberland startdev = base; 22921da177e4SLinus Torvalds 2293543691a4SSebastian Ott start_priv = startdev->private; 2294543691a4SSebastian Ott base_priv = base->private; 2295d42e1712SStefan Haberland 2296d42e1712SStefan Haberland rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize); 2297d42e1712SStefan Haberland 2298d42e1712SStefan Haberland nr_tracks = fdata->stop_unit - fdata->start_unit + 1; 22991da177e4SLinus Torvalds 23001da177e4SLinus Torvalds /* 23011da177e4SLinus Torvalds * fdata->intensity is a bit string that tells us what to do: 23021da177e4SLinus Torvalds * Bit 0: write record zero 23031da177e4SLinus Torvalds * Bit 1: write home address, currently not supported 23041da177e4SLinus Torvalds * Bit 2: invalidate tracks 23051da177e4SLinus Torvalds * Bit 3: use OS/390 compatible disk layout (cdl) 2306f9a28f7bSJean-Baptiste Joret * Bit 4: do not allow storage subsystem to modify record zero 23071da177e4SLinus Torvalds * Only some bit combinations do make sense. 23081da177e4SLinus Torvalds */ 2309f9a28f7bSJean-Baptiste Joret if (fdata->intensity & 0x10) { 2310f9a28f7bSJean-Baptiste Joret r0_perm = 0; 2311f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity & ~0x10; 2312f9a28f7bSJean-Baptiste Joret } else { 2313f9a28f7bSJean-Baptiste Joret r0_perm = 1; 2314f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity; 2315f9a28f7bSJean-Baptiste Joret } 2316d42e1712SStefan Haberland 231718d6624eSStefan Haberland use_prefix = base_priv->features.feature[8] & 0x01; 231818d6624eSStefan Haberland 2319f9a28f7bSJean-Baptiste Joret switch (intensity) { 23201da177e4SLinus Torvalds case 0x00: /* Normal format */ 23211da177e4SLinus Torvalds case 0x08: /* Normal format, use cdl. */ 2322d42e1712SStefan Haberland cplength = 2 + (rpt*nr_tracks); 232318d6624eSStefan Haberland if (use_prefix) 2324d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 23251da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 2326d42e1712SStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 232718d6624eSStefan Haberland else 232818d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 232918d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 233018d6624eSStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 23311da177e4SLinus Torvalds break; 23321da177e4SLinus Torvalds case 0x01: /* Write record zero and format track. */ 23331da177e4SLinus Torvalds case 0x09: /* Write record zero and format track, use cdl. */ 2334d42e1712SStefan Haberland cplength = 2 + rpt * nr_tracks; 233518d6624eSStefan Haberland if (use_prefix) 2336d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 23371da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 23381da177e4SLinus Torvalds sizeof(struct eckd_count) + 2339d42e1712SStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 234018d6624eSStefan Haberland else 234118d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 234218d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 234318d6624eSStefan Haberland sizeof(struct eckd_count) + 234418d6624eSStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 23451da177e4SLinus Torvalds break; 23461da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 23471da177e4SLinus Torvalds case 0x0c: /* Invalidate track, use cdl. */ 23481da177e4SLinus Torvalds cplength = 3; 234918d6624eSStefan Haberland if (use_prefix) 2350d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 23511da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 23521da177e4SLinus Torvalds sizeof(struct eckd_count); 235318d6624eSStefan Haberland else 235418d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 235518d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 235618d6624eSStefan Haberland sizeof(struct eckd_count); 23571da177e4SLinus Torvalds break; 23581da177e4SLinus Torvalds default: 2359d42e1712SStefan Haberland dev_warn(&startdev->cdev->dev, 2360d42e1712SStefan Haberland "An I/O control call used incorrect flags 0x%x\n", 2361d42e1712SStefan Haberland fdata->intensity); 23621da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 23631da177e4SLinus Torvalds } 23641da177e4SLinus Torvalds /* Allocate the format ccw request. */ 2365d42e1712SStefan Haberland fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 2366d42e1712SStefan Haberland datasize, startdev); 23671da177e4SLinus Torvalds if (IS_ERR(fcp)) 23681da177e4SLinus Torvalds return fcp; 23691da177e4SLinus Torvalds 2370d42e1712SStefan Haberland start_priv->count++; 23711da177e4SLinus Torvalds data = fcp->data; 23721da177e4SLinus Torvalds ccw = fcp->cpaddr; 23731da177e4SLinus Torvalds 2374f9a28f7bSJean-Baptiste Joret switch (intensity & ~0x08) { 23751da177e4SLinus Torvalds case 0x00: /* Normal format. */ 237618d6624eSStefan Haberland if (use_prefix) { 2377d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2378d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 2379d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2380f9a28f7bSJean-Baptiste Joret /* grant subsystem permission to format R0 */ 2381f9a28f7bSJean-Baptiste Joret if (r0_perm) 2382d42e1712SStefan Haberland ((struct PFX_eckd_data *)data) 2383d42e1712SStefan Haberland ->define_extent.ga_extended |= 0x04; 2384d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 238518d6624eSStefan Haberland } else { 238618d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 238718d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 238818d6624eSStefan Haberland DASD_ECKD_CCW_WRITE_CKD, startdev); 238918d6624eSStefan Haberland /* grant subsystem permission to format R0 */ 239018d6624eSStefan Haberland if (r0_perm) 239118d6624eSStefan Haberland ((struct DE_eckd_data *) data) 239218d6624eSStefan Haberland ->ga_extended |= 0x04; 239318d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 239418d6624eSStefan Haberland } 23951da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 23961da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 2397d42e1712SStefan Haberland fdata->start_unit, 0, rpt*nr_tracks, 2398d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, 23991da177e4SLinus Torvalds fdata->blksize); 24001da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 24011da177e4SLinus Torvalds break; 24021da177e4SLinus Torvalds case 0x01: /* Write record zero + format track. */ 240318d6624eSStefan Haberland if (use_prefix) { 2404d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2405d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 24061da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, 2407d42e1712SStefan Haberland base, startdev); 2408d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 240918d6624eSStefan Haberland } else { 241018d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 241118d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 241218d6624eSStefan Haberland DASD_ECKD_CCW_WRITE_RECORD_ZERO, startdev); 241318d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 241418d6624eSStefan Haberland } 24151da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 24161da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 2417d42e1712SStefan Haberland fdata->start_unit, 0, rpt * nr_tracks + 1, 2418d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_RECORD_ZERO, base, 2419d42e1712SStefan Haberland base->block->bp_block); 24201da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 24211da177e4SLinus Torvalds break; 24221da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 242318d6624eSStefan Haberland if (use_prefix) { 2424d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2425d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 2426d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2427d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 242818d6624eSStefan Haberland } else { 242918d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 243018d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 243118d6624eSStefan Haberland DASD_ECKD_CCW_WRITE_CKD, startdev); 243218d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 243318d6624eSStefan Haberland } 24341da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 24351da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 24361da177e4SLinus Torvalds fdata->start_unit, 0, 1, 2437d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, 8); 24381da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 24391da177e4SLinus Torvalds break; 24401da177e4SLinus Torvalds } 2441d42e1712SStefan Haberland 2442d42e1712SStefan Haberland for (j = 0; j < nr_tracks; j++) { 2443d42e1712SStefan Haberland /* calculate cylinder and head for the current track */ 2444d42e1712SStefan Haberland set_ch_t(&address, 2445d42e1712SStefan Haberland (fdata->start_unit + j) / 2446d42e1712SStefan Haberland base_priv->rdc_data.trk_per_cyl, 2447d42e1712SStefan Haberland (fdata->start_unit + j) % 2448d42e1712SStefan Haberland base_priv->rdc_data.trk_per_cyl); 2449f9a28f7bSJean-Baptiste Joret if (intensity & 0x01) { /* write record zero */ 24501da177e4SLinus Torvalds ect = (struct eckd_count *) data; 24511da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2452b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2453b44b0ab3SStefan Weinhuber ect->head = address.head; 24541da177e4SLinus Torvalds ect->record = 0; 24551da177e4SLinus Torvalds ect->kl = 0; 24561da177e4SLinus Torvalds ect->dl = 8; 24571da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 24581da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 24591da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 24601da177e4SLinus Torvalds ccw->count = 8; 24611da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 24621da177e4SLinus Torvalds ccw++; 24631da177e4SLinus Torvalds } 2464f9a28f7bSJean-Baptiste Joret if ((intensity & ~0x08) & 0x04) { /* erase track */ 24651da177e4SLinus Torvalds ect = (struct eckd_count *) data; 24661da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2467b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2468b44b0ab3SStefan Weinhuber ect->head = address.head; 24691da177e4SLinus Torvalds ect->record = 1; 24701da177e4SLinus Torvalds ect->kl = 0; 24711da177e4SLinus Torvalds ect->dl = 0; 24721da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 24731da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 24741da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 24751da177e4SLinus Torvalds ccw->count = 8; 24761da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 24771da177e4SLinus Torvalds } else { /* write remaining records */ 24781da177e4SLinus Torvalds for (i = 0; i < rpt; i++) { 24791da177e4SLinus Torvalds ect = (struct eckd_count *) data; 24801da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2481b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2482b44b0ab3SStefan Weinhuber ect->head = address.head; 24831da177e4SLinus Torvalds ect->record = i + 1; 24841da177e4SLinus Torvalds ect->kl = 0; 24851da177e4SLinus Torvalds ect->dl = fdata->blksize; 2486d42e1712SStefan Haberland /* 2487d42e1712SStefan Haberland * Check for special tracks 0-1 2488d42e1712SStefan Haberland * when formatting CDL 2489d42e1712SStefan Haberland */ 2490f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 249146d1c03cSJan Höppner address.cyl == 0 && address.head == 0) { 24921da177e4SLinus Torvalds if (i < 3) { 24931da177e4SLinus Torvalds ect->kl = 4; 24941da177e4SLinus Torvalds ect->dl = sizes_trk0[i] - 4; 24951da177e4SLinus Torvalds } 24961da177e4SLinus Torvalds } 2497f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 249846d1c03cSJan Höppner address.cyl == 0 && address.head == 1) { 24991da177e4SLinus Torvalds ect->kl = 44; 25001da177e4SLinus Torvalds ect->dl = LABEL_SIZE - 44; 25011da177e4SLinus Torvalds } 25021da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 2503d42e1712SStefan Haberland if (i != 0 || j == 0) 2504d42e1712SStefan Haberland ccw->cmd_code = 2505d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD; 2506d42e1712SStefan Haberland else 2507d42e1712SStefan Haberland ccw->cmd_code = 2508d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD_MT; 25091da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 25101da177e4SLinus Torvalds ccw->count = 8; 25111da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 25121da177e4SLinus Torvalds ccw++; 25131da177e4SLinus Torvalds } 25141da177e4SLinus Torvalds } 2515d42e1712SStefan Haberland } 2516d42e1712SStefan Haberland 2517d42e1712SStefan Haberland fcp->startdev = startdev; 2518d42e1712SStefan Haberland fcp->memdev = startdev; 251929b8dd9dSStefan Haberland fcp->basedev = base; 2520eb6e199bSStefan Weinhuber fcp->retries = 256; 2521d42e1712SStefan Haberland fcp->expires = startdev->default_expires * HZ; 25221aae0560SHeiko Carstens fcp->buildclk = get_tod_clock(); 25231da177e4SLinus Torvalds fcp->status = DASD_CQR_FILLED; 2524d42e1712SStefan Haberland 25251da177e4SLinus Torvalds return fcp; 25261da177e4SLinus Torvalds } 25271da177e4SLinus Torvalds 2528570d237cSJan Höppner /* 2529570d237cSJan Höppner * Wrapper function to build a CCW request depending on input data 2530570d237cSJan Höppner */ 2531570d237cSJan Höppner static struct dasd_ccw_req * 2532570d237cSJan Höppner dasd_eckd_format_build_ccw_req(struct dasd_device *base, 25338fd57520SJan Höppner struct format_data_t *fdata, int enable_pav, 25348fd57520SJan Höppner int tpm, struct eckd_count *fmt_buffer, int rpt) 2535d42e1712SStefan Haberland { 25368fd57520SJan Höppner struct dasd_ccw_req *ccw_req; 25378fd57520SJan Höppner 25388fd57520SJan Höppner if (!fmt_buffer) { 25398fd57520SJan Höppner ccw_req = dasd_eckd_build_format(base, fdata, enable_pav); 25408fd57520SJan Höppner } else { 25418fd57520SJan Höppner if (tpm) 25428fd57520SJan Höppner ccw_req = dasd_eckd_build_check_tcw(base, fdata, 25438fd57520SJan Höppner enable_pav, 25448fd57520SJan Höppner fmt_buffer, rpt); 25458fd57520SJan Höppner else 25468fd57520SJan Höppner ccw_req = dasd_eckd_build_check(base, fdata, enable_pav, 25478fd57520SJan Höppner fmt_buffer, rpt); 25488fd57520SJan Höppner } 25498fd57520SJan Höppner 25508fd57520SJan Höppner return ccw_req; 2551570d237cSJan Höppner } 2552570d237cSJan Höppner 2553570d237cSJan Höppner /* 2554570d237cSJan Höppner * Sanity checks on format_data 2555570d237cSJan Höppner */ 2556570d237cSJan Höppner static int dasd_eckd_format_sanity_checks(struct dasd_device *base, 2557570d237cSJan Höppner struct format_data_t *fdata) 2558570d237cSJan Höppner { 2559543691a4SSebastian Ott struct dasd_eckd_private *private = base->private; 2560d42e1712SStefan Haberland 2561d42e1712SStefan Haberland if (fdata->start_unit >= 2562d42e1712SStefan Haberland (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2563d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2564d42e1712SStefan Haberland "Start track number %u used in formatting is too big\n", 2565d42e1712SStefan Haberland fdata->start_unit); 2566d42e1712SStefan Haberland return -EINVAL; 2567d42e1712SStefan Haberland } 2568d42e1712SStefan Haberland if (fdata->stop_unit >= 2569d42e1712SStefan Haberland (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2570d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2571d42e1712SStefan Haberland "Stop track number %u used in formatting is too big\n", 2572d42e1712SStefan Haberland fdata->stop_unit); 2573d42e1712SStefan Haberland return -EINVAL; 2574d42e1712SStefan Haberland } 2575d42e1712SStefan Haberland if (fdata->start_unit > fdata->stop_unit) { 2576d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2577d42e1712SStefan Haberland "Start track %u used in formatting exceeds end track\n", 2578d42e1712SStefan Haberland fdata->start_unit); 2579d42e1712SStefan Haberland return -EINVAL; 2580d42e1712SStefan Haberland } 2581d42e1712SStefan Haberland if (dasd_check_blocksize(fdata->blksize) != 0) { 2582d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2583d42e1712SStefan Haberland "The DASD cannot be formatted with block size %u\n", 2584d42e1712SStefan Haberland fdata->blksize); 2585d42e1712SStefan Haberland return -EINVAL; 2586d42e1712SStefan Haberland } 2587570d237cSJan Höppner return 0; 2588570d237cSJan Höppner } 2589570d237cSJan Höppner 2590570d237cSJan Höppner /* 2591570d237cSJan Höppner * This function will process format_data originally coming from an IOCTL 2592570d237cSJan Höppner */ 2593570d237cSJan Höppner static int dasd_eckd_format_process_data(struct dasd_device *base, 2594570d237cSJan Höppner struct format_data_t *fdata, 25958fd57520SJan Höppner int enable_pav, int tpm, 25968fd57520SJan Höppner struct eckd_count *fmt_buffer, int rpt, 25978fd57520SJan Höppner struct irb *irb) 2598570d237cSJan Höppner { 2599543691a4SSebastian Ott struct dasd_eckd_private *private = base->private; 2600570d237cSJan Höppner struct dasd_ccw_req *cqr, *n; 2601570d237cSJan Höppner struct list_head format_queue; 2602570d237cSJan Höppner struct dasd_device *device; 26038fd57520SJan Höppner char *sense = NULL; 2604570d237cSJan Höppner int old_start, old_stop, format_step; 2605570d237cSJan Höppner int step, retry; 2606570d237cSJan Höppner int rc; 2607570d237cSJan Höppner 2608570d237cSJan Höppner rc = dasd_eckd_format_sanity_checks(base, fdata); 2609570d237cSJan Höppner if (rc) 2610570d237cSJan Höppner return rc; 2611d42e1712SStefan Haberland 2612d42e1712SStefan Haberland INIT_LIST_HEAD(&format_queue); 2613d42e1712SStefan Haberland 261446d1c03cSJan Höppner old_start = fdata->start_unit; 261529b8dd9dSStefan Haberland old_stop = fdata->stop_unit; 2616d42e1712SStefan Haberland 26178fd57520SJan Höppner if (!tpm && fmt_buffer != NULL) { 26188fd57520SJan Höppner /* Command Mode / Format Check */ 26198fd57520SJan Höppner format_step = 1; 26208fd57520SJan Höppner } else if (tpm && fmt_buffer != NULL) { 26218fd57520SJan Höppner /* Transport Mode / Format Check */ 26228fd57520SJan Höppner format_step = DASD_CQR_MAX_CCW / rpt; 26238fd57520SJan Höppner } else { 26248fd57520SJan Höppner /* Normal Formatting */ 26258fd57520SJan Höppner format_step = DASD_CQR_MAX_CCW / 26268fd57520SJan Höppner recs_per_track(&private->rdc_data, 0, fdata->blksize); 26278fd57520SJan Höppner } 26288fd57520SJan Höppner 262946d1c03cSJan Höppner do { 263046d1c03cSJan Höppner retry = 0; 2631d42e1712SStefan Haberland while (fdata->start_unit <= old_stop) { 2632d42e1712SStefan Haberland step = fdata->stop_unit - fdata->start_unit + 1; 263346d1c03cSJan Höppner if (step > format_step) { 263446d1c03cSJan Höppner fdata->stop_unit = 263546d1c03cSJan Höppner fdata->start_unit + format_step - 1; 263646d1c03cSJan Höppner } 2637d42e1712SStefan Haberland 2638570d237cSJan Höppner cqr = dasd_eckd_format_build_ccw_req(base, fdata, 26398fd57520SJan Höppner enable_pav, tpm, 26408fd57520SJan Höppner fmt_buffer, rpt); 2641d42e1712SStefan Haberland if (IS_ERR(cqr)) { 264246d1c03cSJan Höppner rc = PTR_ERR(cqr); 264346d1c03cSJan Höppner if (rc == -ENOMEM) { 264446d1c03cSJan Höppner if (list_empty(&format_queue)) 264546d1c03cSJan Höppner goto out; 2646d42e1712SStefan Haberland /* 264746d1c03cSJan Höppner * not enough memory available, start 264846d1c03cSJan Höppner * requests retry after first requests 264946d1c03cSJan Höppner * were finished 2650d42e1712SStefan Haberland */ 265146d1c03cSJan Höppner retry = 1; 265246d1c03cSJan Höppner break; 2653d42e1712SStefan Haberland } 265446d1c03cSJan Höppner goto out_err; 265546d1c03cSJan Höppner } 265646d1c03cSJan Höppner list_add_tail(&cqr->blocklist, &format_queue); 2657d42e1712SStefan Haberland 26588fd57520SJan Höppner if (fmt_buffer) { 26598fd57520SJan Höppner step = fdata->stop_unit - fdata->start_unit + 1; 26608fd57520SJan Höppner fmt_buffer += rpt * step; 26618fd57520SJan Höppner } 2662d42e1712SStefan Haberland fdata->start_unit = fdata->stop_unit + 1; 2663d42e1712SStefan Haberland fdata->stop_unit = old_stop; 2664d42e1712SStefan Haberland } 2665d42e1712SStefan Haberland 266646d1c03cSJan Höppner rc = dasd_sleep_on_queue(&format_queue); 2667d42e1712SStefan Haberland 266846d1c03cSJan Höppner out_err: 2669d42e1712SStefan Haberland list_for_each_entry_safe(cqr, n, &format_queue, blocklist) { 2670d42e1712SStefan Haberland device = cqr->startdev; 2671543691a4SSebastian Ott private = device->private; 26728fd57520SJan Höppner 26738fd57520SJan Höppner if (cqr->status == DASD_CQR_FAILED) { 26748fd57520SJan Höppner /* 26758fd57520SJan Höppner * Only get sense data if called by format 26768fd57520SJan Höppner * check 26778fd57520SJan Höppner */ 26788fd57520SJan Höppner if (fmt_buffer && irb) { 26798fd57520SJan Höppner sense = dasd_get_sense(&cqr->irb); 26808fd57520SJan Höppner memcpy(irb, &cqr->irb, sizeof(*irb)); 26818fd57520SJan Höppner } 2682d42e1712SStefan Haberland rc = -EIO; 26838fd57520SJan Höppner } 2684d42e1712SStefan Haberland list_del_init(&cqr->blocklist); 2685d42e1712SStefan Haberland dasd_sfree_request(cqr, device); 2686d42e1712SStefan Haberland private->count--; 2687d42e1712SStefan Haberland } 2688d42e1712SStefan Haberland 26898fd57520SJan Höppner if (rc && rc != -EIO) 269046d1c03cSJan Höppner goto out; 26918fd57520SJan Höppner if (rc == -EIO) { 26928fd57520SJan Höppner /* 26938fd57520SJan Höppner * In case fewer than the expected records are on the 26948fd57520SJan Höppner * track, we will most likely get a 'No Record Found' 26958fd57520SJan Höppner * error (in command mode) or a 'File Protected' error 26968fd57520SJan Höppner * (in transport mode). Those particular cases shouldn't 26978fd57520SJan Höppner * pass the -EIO to the IOCTL, therefore reset the rc 26988fd57520SJan Höppner * and continue. 26998fd57520SJan Höppner */ 27008fd57520SJan Höppner if (sense && 27018fd57520SJan Höppner (sense[1] & SNS1_NO_REC_FOUND || 27028fd57520SJan Höppner sense[1] & SNS1_FILE_PROTECTED)) 27038fd57520SJan Höppner retry = 1; 27048fd57520SJan Höppner else 27058fd57520SJan Höppner goto out; 27068fd57520SJan Höppner } 270729b8dd9dSStefan Haberland 270846d1c03cSJan Höppner } while (retry); 270946d1c03cSJan Höppner 271046d1c03cSJan Höppner out: 271146d1c03cSJan Höppner fdata->start_unit = old_start; 271246d1c03cSJan Höppner fdata->stop_unit = old_stop; 2713d42e1712SStefan Haberland 2714d42e1712SStefan Haberland return rc; 2715d42e1712SStefan Haberland } 2716d42e1712SStefan Haberland 2717570d237cSJan Höppner static int dasd_eckd_format_device(struct dasd_device *base, 2718570d237cSJan Höppner struct format_data_t *fdata, int enable_pav) 2719570d237cSJan Höppner { 27208fd57520SJan Höppner return dasd_eckd_format_process_data(base, fdata, enable_pav, 0, NULL, 27218fd57520SJan Höppner 0, NULL); 27228fd57520SJan Höppner } 27238fd57520SJan Höppner 27248fd57520SJan Höppner /* 27258fd57520SJan Höppner * Helper function to count consecutive records of a single track. 27268fd57520SJan Höppner */ 27278fd57520SJan Höppner static int dasd_eckd_count_records(struct eckd_count *fmt_buffer, int start, 27288fd57520SJan Höppner int max) 27298fd57520SJan Höppner { 27308fd57520SJan Höppner int head; 27318fd57520SJan Höppner int i; 27328fd57520SJan Höppner 27338fd57520SJan Höppner head = fmt_buffer[start].head; 27348fd57520SJan Höppner 27358fd57520SJan Höppner /* 27368fd57520SJan Höppner * There are 3 conditions where we stop counting: 27378fd57520SJan Höppner * - if data reoccurs (same head and record may reoccur), which may 27388fd57520SJan Höppner * happen due to the way DASD_ECKD_CCW_READ_COUNT works 27398fd57520SJan Höppner * - when the head changes, because we're iterating over several tracks 27408fd57520SJan Höppner * then (DASD_ECKD_CCW_READ_COUNT_MT) 27418fd57520SJan Höppner * - when we've reached the end of sensible data in the buffer (the 27428fd57520SJan Höppner * record will be 0 then) 27438fd57520SJan Höppner */ 27448fd57520SJan Höppner for (i = start; i < max; i++) { 27458fd57520SJan Höppner if (i > start) { 27468fd57520SJan Höppner if ((fmt_buffer[i].head == head && 27478fd57520SJan Höppner fmt_buffer[i].record == 1) || 27488fd57520SJan Höppner fmt_buffer[i].head != head || 27498fd57520SJan Höppner fmt_buffer[i].record == 0) 27508fd57520SJan Höppner break; 27518fd57520SJan Höppner } 27528fd57520SJan Höppner } 27538fd57520SJan Höppner 27548fd57520SJan Höppner return i - start; 27558fd57520SJan Höppner } 27568fd57520SJan Höppner 27578fd57520SJan Höppner /* 27588fd57520SJan Höppner * Evaluate a given range of tracks. Data like number of records, blocksize, 27598fd57520SJan Höppner * record ids, and key length are compared with expected data. 27608fd57520SJan Höppner * 27618fd57520SJan Höppner * If a mismatch occurs, the corresponding error bit is set, as well as 27628fd57520SJan Höppner * additional information, depending on the error. 27638fd57520SJan Höppner */ 27648fd57520SJan Höppner static void dasd_eckd_format_evaluate_tracks(struct eckd_count *fmt_buffer, 27658fd57520SJan Höppner struct format_check_t *cdata, 27668fd57520SJan Höppner int rpt_max, int rpt_exp, 27678fd57520SJan Höppner int trk_per_cyl, int tpm) 27688fd57520SJan Höppner { 27698fd57520SJan Höppner struct ch_t geo; 27708fd57520SJan Höppner int max_entries; 27718fd57520SJan Höppner int count = 0; 27728fd57520SJan Höppner int trkcount; 27738fd57520SJan Höppner int blksize; 27748fd57520SJan Höppner int pos = 0; 27758fd57520SJan Höppner int i, j; 27768fd57520SJan Höppner int kl; 27778fd57520SJan Höppner 27788fd57520SJan Höppner trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; 27798fd57520SJan Höppner max_entries = trkcount * rpt_max; 27808fd57520SJan Höppner 27818fd57520SJan Höppner for (i = cdata->expect.start_unit; i <= cdata->expect.stop_unit; i++) { 27828fd57520SJan Höppner /* Calculate the correct next starting position in the buffer */ 27838fd57520SJan Höppner if (tpm) { 27848fd57520SJan Höppner while (fmt_buffer[pos].record == 0 && 27858fd57520SJan Höppner fmt_buffer[pos].dl == 0) { 27868fd57520SJan Höppner if (pos++ > max_entries) 27878fd57520SJan Höppner break; 27888fd57520SJan Höppner } 27898fd57520SJan Höppner } else { 27908fd57520SJan Höppner if (i != cdata->expect.start_unit) 27918fd57520SJan Höppner pos += rpt_max - count; 27928fd57520SJan Höppner } 27938fd57520SJan Höppner 27948fd57520SJan Höppner /* Calculate the expected geo values for the current track */ 27958fd57520SJan Höppner set_ch_t(&geo, i / trk_per_cyl, i % trk_per_cyl); 27968fd57520SJan Höppner 27978fd57520SJan Höppner /* Count and check number of records */ 27988fd57520SJan Höppner count = dasd_eckd_count_records(fmt_buffer, pos, pos + rpt_max); 27998fd57520SJan Höppner 28008fd57520SJan Höppner if (count < rpt_exp) { 28018fd57520SJan Höppner cdata->result = DASD_FMT_ERR_TOO_FEW_RECORDS; 28028fd57520SJan Höppner break; 28038fd57520SJan Höppner } 28048fd57520SJan Höppner if (count > rpt_exp) { 28058fd57520SJan Höppner cdata->result = DASD_FMT_ERR_TOO_MANY_RECORDS; 28068fd57520SJan Höppner break; 28078fd57520SJan Höppner } 28088fd57520SJan Höppner 28098fd57520SJan Höppner for (j = 0; j < count; j++, pos++) { 28108fd57520SJan Höppner blksize = cdata->expect.blksize; 28118fd57520SJan Höppner kl = 0; 28128fd57520SJan Höppner 28138fd57520SJan Höppner /* 28148fd57520SJan Höppner * Set special values when checking CDL formatted 28158fd57520SJan Höppner * devices. 28168fd57520SJan Höppner */ 28178fd57520SJan Höppner if ((cdata->expect.intensity & 0x08) && 28188fd57520SJan Höppner geo.cyl == 0 && geo.head == 0) { 28198fd57520SJan Höppner if (j < 3) { 28208fd57520SJan Höppner blksize = sizes_trk0[j] - 4; 28218fd57520SJan Höppner kl = 4; 28228fd57520SJan Höppner } 28238fd57520SJan Höppner } 28248fd57520SJan Höppner if ((cdata->expect.intensity & 0x08) && 28258fd57520SJan Höppner geo.cyl == 0 && geo.head == 1) { 28268fd57520SJan Höppner blksize = LABEL_SIZE - 44; 28278fd57520SJan Höppner kl = 44; 28288fd57520SJan Höppner } 28298fd57520SJan Höppner 28308fd57520SJan Höppner /* Check blocksize */ 28318fd57520SJan Höppner if (fmt_buffer[pos].dl != blksize) { 28328fd57520SJan Höppner cdata->result = DASD_FMT_ERR_BLKSIZE; 28338fd57520SJan Höppner goto out; 28348fd57520SJan Höppner } 28358fd57520SJan Höppner /* Check if key length is 0 */ 28368fd57520SJan Höppner if (fmt_buffer[pos].kl != kl) { 28378fd57520SJan Höppner cdata->result = DASD_FMT_ERR_KEY_LENGTH; 28388fd57520SJan Höppner goto out; 28398fd57520SJan Höppner } 28408fd57520SJan Höppner /* Check if record_id is correct */ 28418fd57520SJan Höppner if (fmt_buffer[pos].cyl != geo.cyl || 28428fd57520SJan Höppner fmt_buffer[pos].head != geo.head || 28438fd57520SJan Höppner fmt_buffer[pos].record != (j + 1)) { 28448fd57520SJan Höppner cdata->result = DASD_FMT_ERR_RECORD_ID; 28458fd57520SJan Höppner goto out; 28468fd57520SJan Höppner } 28478fd57520SJan Höppner } 28488fd57520SJan Höppner } 28498fd57520SJan Höppner 28508fd57520SJan Höppner out: 28518fd57520SJan Höppner /* 28528fd57520SJan Höppner * In case of no errors, we need to decrease by one 28538fd57520SJan Höppner * to get the correct positions. 28548fd57520SJan Höppner */ 28558fd57520SJan Höppner if (!cdata->result) { 28568fd57520SJan Höppner i--; 28578fd57520SJan Höppner pos--; 28588fd57520SJan Höppner } 28598fd57520SJan Höppner 28608fd57520SJan Höppner cdata->unit = i; 28618fd57520SJan Höppner cdata->num_records = count; 28628fd57520SJan Höppner cdata->rec = fmt_buffer[pos].record; 28638fd57520SJan Höppner cdata->blksize = fmt_buffer[pos].dl; 28648fd57520SJan Höppner cdata->key_length = fmt_buffer[pos].kl; 28658fd57520SJan Höppner } 28668fd57520SJan Höppner 28678fd57520SJan Höppner /* 28688fd57520SJan Höppner * Check the format of a range of tracks of a DASD. 28698fd57520SJan Höppner */ 28708fd57520SJan Höppner static int dasd_eckd_check_device_format(struct dasd_device *base, 28718fd57520SJan Höppner struct format_check_t *cdata, 28728fd57520SJan Höppner int enable_pav) 28738fd57520SJan Höppner { 28748fd57520SJan Höppner struct dasd_eckd_private *private = base->private; 28758fd57520SJan Höppner struct eckd_count *fmt_buffer; 28768fd57520SJan Höppner struct irb irb; 28778fd57520SJan Höppner int rpt_max, rpt_exp; 28788fd57520SJan Höppner int fmt_buffer_size; 28798fd57520SJan Höppner int trk_per_cyl; 28808fd57520SJan Höppner int trkcount; 28818fd57520SJan Höppner int tpm = 0; 28828fd57520SJan Höppner int rc; 28838fd57520SJan Höppner 28848fd57520SJan Höppner trk_per_cyl = private->rdc_data.trk_per_cyl; 28858fd57520SJan Höppner 28868fd57520SJan Höppner /* Get maximum and expected amount of records per track */ 28878fd57520SJan Höppner rpt_max = recs_per_track(&private->rdc_data, 0, 512) + 1; 28888fd57520SJan Höppner rpt_exp = recs_per_track(&private->rdc_data, 0, cdata->expect.blksize); 28898fd57520SJan Höppner 28908fd57520SJan Höppner trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; 28918fd57520SJan Höppner fmt_buffer_size = trkcount * rpt_max * sizeof(struct eckd_count); 28928fd57520SJan Höppner 28938fd57520SJan Höppner fmt_buffer = kzalloc(fmt_buffer_size, GFP_KERNEL | GFP_DMA); 28948fd57520SJan Höppner if (!fmt_buffer) 28958fd57520SJan Höppner return -ENOMEM; 28968fd57520SJan Höppner 28978fd57520SJan Höppner /* 28988fd57520SJan Höppner * A certain FICON feature subset is needed to operate in transport 28998fd57520SJan Höppner * mode. Additionally, the support for transport mode is implicitly 29008fd57520SJan Höppner * checked by comparing the buffer size with fcx_max_data. As long as 29018fd57520SJan Höppner * the buffer size is smaller we can operate in transport mode and 29028fd57520SJan Höppner * process multiple tracks. If not, only one track at once is being 29038fd57520SJan Höppner * processed using command mode. 29048fd57520SJan Höppner */ 29058fd57520SJan Höppner if ((private->features.feature[40] & 0x04) && 29068fd57520SJan Höppner fmt_buffer_size <= private->fcx_max_data) 29078fd57520SJan Höppner tpm = 1; 29088fd57520SJan Höppner 29098fd57520SJan Höppner rc = dasd_eckd_format_process_data(base, &cdata->expect, enable_pav, 29108fd57520SJan Höppner tpm, fmt_buffer, rpt_max, &irb); 29118fd57520SJan Höppner if (rc && rc != -EIO) 29128fd57520SJan Höppner goto out; 29138fd57520SJan Höppner if (rc == -EIO) { 29148fd57520SJan Höppner /* 29158fd57520SJan Höppner * If our first attempt with transport mode enabled comes back 29168fd57520SJan Höppner * with an incorrect length error, we're going to retry the 29178fd57520SJan Höppner * check with command mode. 29188fd57520SJan Höppner */ 29198fd57520SJan Höppner if (tpm && scsw_cstat(&irb.scsw) == 0x40) { 29208fd57520SJan Höppner tpm = 0; 29218fd57520SJan Höppner rc = dasd_eckd_format_process_data(base, &cdata->expect, 29228fd57520SJan Höppner enable_pav, tpm, 29238fd57520SJan Höppner fmt_buffer, rpt_max, 29248fd57520SJan Höppner &irb); 29258fd57520SJan Höppner if (rc) 29268fd57520SJan Höppner goto out; 29278fd57520SJan Höppner } else { 29288fd57520SJan Höppner goto out; 29298fd57520SJan Höppner } 29308fd57520SJan Höppner } 29318fd57520SJan Höppner 29328fd57520SJan Höppner dasd_eckd_format_evaluate_tracks(fmt_buffer, cdata, rpt_max, rpt_exp, 29338fd57520SJan Höppner trk_per_cyl, tpm); 29348fd57520SJan Höppner 29358fd57520SJan Höppner out: 29368fd57520SJan Höppner kfree(fmt_buffer); 29378fd57520SJan Höppner 29388fd57520SJan Höppner return rc; 2939570d237cSJan Höppner } 2940570d237cSJan Höppner 29418e09f215SStefan Weinhuber static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 29421da177e4SLinus Torvalds { 2943a2ace466SHannes Reinecke if (cqr->retries < 0) { 2944a2ace466SHannes Reinecke cqr->status = DASD_CQR_FAILED; 2945a2ace466SHannes Reinecke return; 2946a2ace466SHannes Reinecke } 29478e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 29488e09f215SStefan Weinhuber if (cqr->block && (cqr->startdev != cqr->block->base)) { 29498e09f215SStefan Weinhuber dasd_eckd_reset_ccw_to_base_io(cqr); 29508e09f215SStefan Weinhuber cqr->startdev = cqr->block->base; 2951c9346151SStefan Haberland cqr->lpm = dasd_path_get_opm(cqr->block->base); 29521da177e4SLinus Torvalds } 29538e09f215SStefan Weinhuber }; 29541da177e4SLinus Torvalds 29551da177e4SLinus Torvalds static dasd_erp_fn_t 29561da177e4SLinus Torvalds dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 29571da177e4SLinus Torvalds { 29588e09f215SStefan Weinhuber struct dasd_device *device = (struct dasd_device *) cqr->startdev; 29591da177e4SLinus Torvalds struct ccw_device *cdev = device->cdev; 29601da177e4SLinus Torvalds 29611da177e4SLinus Torvalds switch (cdev->id.cu_type) { 29621da177e4SLinus Torvalds case 0x3990: 29631da177e4SLinus Torvalds case 0x2105: 29641da177e4SLinus Torvalds case 0x2107: 29651da177e4SLinus Torvalds case 0x1750: 29661da177e4SLinus Torvalds return dasd_3990_erp_action; 29671da177e4SLinus Torvalds case 0x9343: 29681da177e4SLinus Torvalds case 0x3880: 29691da177e4SLinus Torvalds default: 29701da177e4SLinus Torvalds return dasd_default_erp_action; 29711da177e4SLinus Torvalds } 29721da177e4SLinus Torvalds } 29731da177e4SLinus Torvalds 29741da177e4SLinus Torvalds static dasd_erp_fn_t 29751da177e4SLinus Torvalds dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 29761da177e4SLinus Torvalds { 29771da177e4SLinus Torvalds return dasd_default_erp_postaction; 29781da177e4SLinus Torvalds } 29791da177e4SLinus Torvalds 29805a27e60dSStefan Weinhuber static void dasd_eckd_check_for_device_change(struct dasd_device *device, 29815a27e60dSStefan Weinhuber struct dasd_ccw_req *cqr, 29828e09f215SStefan Weinhuber struct irb *irb) 29838e09f215SStefan Weinhuber { 29848e09f215SStefan Weinhuber char mask; 2985f3eb5384SStefan Weinhuber char *sense = NULL; 2986543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 29878e09f215SStefan Weinhuber 29888e09f215SStefan Weinhuber /* first of all check for state change pending interrupt */ 29898e09f215SStefan Weinhuber mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 2990f3eb5384SStefan Weinhuber if ((scsw_dstat(&irb->scsw) & mask) == mask) { 2991c8d1c0ffSStefan Haberland /* 2992c8d1c0ffSStefan Haberland * for alias only, not in offline processing 2993c8d1c0ffSStefan Haberland * and only if not suspended 2994c8d1c0ffSStefan Haberland */ 2995501183f2SStefan Haberland if (!device->block && private->lcu && 299625e2cf1cSStefan Haberland device->state == DASD_STATE_ONLINE && 2997c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_OFFLINE, &device->flags) && 2998c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 2999501183f2SStefan Haberland /* schedule worker to reload device */ 3000501183f2SStefan Haberland dasd_reload_device(device); 3001501183f2SStefan Haberland } 30028e09f215SStefan Weinhuber dasd_generic_handle_state_change(device); 30038e09f215SStefan Weinhuber return; 30048e09f215SStefan Weinhuber } 30058e09f215SStefan Weinhuber 3006a5a0061fSStefan Weinhuber sense = dasd_get_sense(irb); 30075a27e60dSStefan Weinhuber if (!sense) 30085a27e60dSStefan Weinhuber return; 30095a27e60dSStefan Weinhuber 30105a27e60dSStefan Weinhuber /* summary unit check */ 3011c7a29e56SStefan Weinhuber if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) && 3012a5a0061fSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { 301359a9ed5fSStefan Haberland if (test_and_set_bit(DASD_FLAG_SUC, &device->flags)) { 301459a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 301559a9ed5fSStefan Haberland "eckd suc: device already notified"); 301659a9ed5fSStefan Haberland return; 301759a9ed5fSStefan Haberland } 301859a9ed5fSStefan Haberland sense = dasd_get_sense(irb); 301959a9ed5fSStefan Haberland if (!sense) { 302059a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 302159a9ed5fSStefan Haberland "eckd suc: no reason code available"); 302259a9ed5fSStefan Haberland clear_bit(DASD_FLAG_SUC, &device->flags); 302359a9ed5fSStefan Haberland return; 302459a9ed5fSStefan Haberland 302559a9ed5fSStefan Haberland } 302659a9ed5fSStefan Haberland private->suc_reason = sense[8]; 302759a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_NOTICE, device, "%s %x", 302859a9ed5fSStefan Haberland "eckd handle summary unit check: reason", 302959a9ed5fSStefan Haberland private->suc_reason); 303059a9ed5fSStefan Haberland dasd_get_device(device); 303159a9ed5fSStefan Haberland if (!schedule_work(&device->suc_work)) 303259a9ed5fSStefan Haberland dasd_put_device(device); 303359a9ed5fSStefan Haberland 30348e09f215SStefan Weinhuber return; 30358e09f215SStefan Weinhuber } 30368e09f215SStefan Weinhuber 3037f60c768cSStefan Haberland /* service information message SIM */ 30385a27e60dSStefan Weinhuber if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && 3039f3eb5384SStefan Weinhuber ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 3040f3eb5384SStefan Weinhuber dasd_3990_erp_handle_sim(device, sense); 3041f60c768cSStefan Haberland return; 3042f60c768cSStefan Haberland } 3043f60c768cSStefan Haberland 30445a27e60dSStefan Weinhuber /* loss of device reservation is handled via base devices only 30455a27e60dSStefan Weinhuber * as alias devices may be used with several bases 30465a27e60dSStefan Weinhuber */ 3047c7a29e56SStefan Weinhuber if (device->block && (sense[27] & DASD_SENSE_BIT_0) && 3048c7a29e56SStefan Weinhuber (sense[7] == 0x3F) && 30495a27e60dSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && 30505a27e60dSStefan Weinhuber test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { 30515a27e60dSStefan Weinhuber if (device->features & DASD_FEATURE_FAILONSLCK) 30525a27e60dSStefan Weinhuber set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); 30535a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 30545a27e60dSStefan Weinhuber dev_err(&device->cdev->dev, 30555a27e60dSStefan Weinhuber "The device reservation was lost\n"); 3056ada3df91SStefan Haberland } 30575a27e60dSStefan Weinhuber } 3058f3eb5384SStefan Weinhuber 3059f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( 3060f3eb5384SStefan Weinhuber struct dasd_device *startdev, 30618e09f215SStefan Weinhuber struct dasd_block *block, 3062f3eb5384SStefan Weinhuber struct request *req, 3063f3eb5384SStefan Weinhuber sector_t first_rec, 3064f3eb5384SStefan Weinhuber sector_t last_rec, 3065f3eb5384SStefan Weinhuber sector_t first_trk, 3066f3eb5384SStefan Weinhuber sector_t last_trk, 3067f3eb5384SStefan Weinhuber unsigned int first_offs, 3068f3eb5384SStefan Weinhuber unsigned int last_offs, 3069f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 3070f3eb5384SStefan Weinhuber unsigned int blksize) 30711da177e4SLinus Torvalds { 30721da177e4SLinus Torvalds struct dasd_eckd_private *private; 30731da177e4SLinus Torvalds unsigned long *idaws; 30741da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 30751da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 30761da177e4SLinus Torvalds struct ccw1 *ccw; 30775705f702SNeilBrown struct req_iterator iter; 30787988613bSKent Overstreet struct bio_vec bv; 30791da177e4SLinus Torvalds char *dst; 3080f3eb5384SStefan Weinhuber unsigned int off; 30811da177e4SLinus Torvalds int count, cidaw, cplength, datasize; 3082f3eb5384SStefan Weinhuber sector_t recid; 30831da177e4SLinus Torvalds unsigned char cmd, rcmd; 30848e09f215SStefan Weinhuber int use_prefix; 30858e09f215SStefan Weinhuber struct dasd_device *basedev; 30861da177e4SLinus Torvalds 30878e09f215SStefan Weinhuber basedev = block->base; 3088543691a4SSebastian Ott private = basedev->private; 30891da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 30901da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_READ_MT; 30911da177e4SLinus Torvalds else if (rq_data_dir(req) == WRITE) 30921da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_WRITE_MT; 30931da177e4SLinus Torvalds else 30941da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 3095f3eb5384SStefan Weinhuber 30961da177e4SLinus Torvalds /* Check struct bio and count the number of blocks for the request. */ 30971da177e4SLinus Torvalds count = 0; 30981da177e4SLinus Torvalds cidaw = 0; 30995705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 31007988613bSKent Overstreet if (bv.bv_len & (blksize - 1)) 31011da177e4SLinus Torvalds /* Eckd can only do full blocks. */ 31021da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 31037988613bSKent Overstreet count += bv.bv_len >> (block->s2b_shift + 9); 31047988613bSKent Overstreet if (idal_is_needed (page_address(bv.bv_page), bv.bv_len)) 31057988613bSKent Overstreet cidaw += bv.bv_len >> (block->s2b_shift + 9); 31061da177e4SLinus Torvalds } 31071da177e4SLinus Torvalds /* Paranoia. */ 31081da177e4SLinus Torvalds if (count != last_rec - first_rec + 1) 31091da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 31108e09f215SStefan Weinhuber 31118e09f215SStefan Weinhuber /* use the prefix command if available */ 31128e09f215SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 31138e09f215SStefan Weinhuber if (use_prefix) { 31148e09f215SStefan Weinhuber /* 1x prefix + number of blocks */ 31158e09f215SStefan Weinhuber cplength = 2 + count; 31168e09f215SStefan Weinhuber /* 1x prefix + cidaws*sizeof(long) */ 31178e09f215SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 31188e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 31198e09f215SStefan Weinhuber cidaw * sizeof(unsigned long); 31208e09f215SStefan Weinhuber } else { 31211da177e4SLinus Torvalds /* 1x define extent + 1x locate record + number of blocks */ 31221da177e4SLinus Torvalds cplength = 2 + count; 31231da177e4SLinus Torvalds /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 31248e09f215SStefan Weinhuber datasize = sizeof(struct DE_eckd_data) + 31258e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 31261da177e4SLinus Torvalds cidaw * sizeof(unsigned long); 31278e09f215SStefan Weinhuber } 31281da177e4SLinus Torvalds /* Find out the number of additional locate record ccws for cdl. */ 31291da177e4SLinus Torvalds if (private->uses_cdl && first_rec < 2*blk_per_trk) { 31301da177e4SLinus Torvalds if (last_rec >= 2*blk_per_trk) 31311da177e4SLinus Torvalds count = 2*blk_per_trk - first_rec; 31321da177e4SLinus Torvalds cplength += count; 31331da177e4SLinus Torvalds datasize += count*sizeof(struct LO_eckd_data); 31341da177e4SLinus Torvalds } 31351da177e4SLinus Torvalds /* Allocate the ccw request. */ 313668b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 313768b781feSStefan Haberland startdev); 31381da177e4SLinus Torvalds if (IS_ERR(cqr)) 31391da177e4SLinus Torvalds return cqr; 31401da177e4SLinus Torvalds ccw = cqr->cpaddr; 31418e09f215SStefan Weinhuber /* First ccw is define extent or prefix. */ 31428e09f215SStefan Weinhuber if (use_prefix) { 31438e09f215SStefan Weinhuber if (prefix(ccw++, cqr->data, first_trk, 31448e09f215SStefan Weinhuber last_trk, cmd, basedev, startdev) == -EAGAIN) { 31458e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 31468e09f215SStefan Weinhuber * Try again later. 31478e09f215SStefan Weinhuber */ 31488e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 3149d54853efSMartin Schwidefsky return ERR_PTR(-EAGAIN); 3150d54853efSMartin Schwidefsky } 31518e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 31528e09f215SStefan Weinhuber sizeof(struct PFX_eckd_data)); 31538e09f215SStefan Weinhuber } else { 31548e09f215SStefan Weinhuber if (define_extent(ccw++, cqr->data, first_trk, 3155b38f27e8SStefan Haberland last_trk, cmd, basedev) == -EAGAIN) { 31568e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 31578e09f215SStefan Weinhuber * Try again later. 31588e09f215SStefan Weinhuber */ 31598e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 31608e09f215SStefan Weinhuber return ERR_PTR(-EAGAIN); 31618e09f215SStefan Weinhuber } 31628e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 31638e09f215SStefan Weinhuber sizeof(struct DE_eckd_data)); 31648e09f215SStefan Weinhuber } 31651da177e4SLinus Torvalds /* Build locate_record+read/write/ccws. */ 31661da177e4SLinus Torvalds LO_data = (struct LO_eckd_data *) (idaws + cidaw); 31671da177e4SLinus Torvalds recid = first_rec; 31681da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 31691da177e4SLinus Torvalds /* Only standard blocks so there is just one locate record. */ 31701da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 31711da177e4SLinus Torvalds locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 31728e09f215SStefan Weinhuber last_rec - recid + 1, cmd, basedev, blksize); 31731da177e4SLinus Torvalds } 31745705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 31757988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 31761da177e4SLinus Torvalds if (dasd_page_cache) { 31771da177e4SLinus Torvalds char *copy = kmem_cache_alloc(dasd_page_cache, 3178441e143eSChristoph Lameter GFP_DMA | __GFP_NOWARN); 31791da177e4SLinus Torvalds if (copy && rq_data_dir(req) == WRITE) 31807988613bSKent Overstreet memcpy(copy + bv.bv_offset, dst, bv.bv_len); 31811da177e4SLinus Torvalds if (copy) 31827988613bSKent Overstreet dst = copy + bv.bv_offset; 31831da177e4SLinus Torvalds } 31847988613bSKent Overstreet for (off = 0; off < bv.bv_len; off += blksize) { 31851da177e4SLinus Torvalds sector_t trkid = recid; 31861da177e4SLinus Torvalds unsigned int recoffs = sector_div(trkid, blk_per_trk); 31871da177e4SLinus Torvalds rcmd = cmd; 31881da177e4SLinus Torvalds count = blksize; 31891da177e4SLinus Torvalds /* Locate record for cdl special block ? */ 31901da177e4SLinus Torvalds if (private->uses_cdl && recid < 2*blk_per_trk) { 31911da177e4SLinus Torvalds if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 31921da177e4SLinus Torvalds rcmd |= 0x8; 31931da177e4SLinus Torvalds count = dasd_eckd_cdl_reclen(recid); 3194ec5883abSHorst Hummel if (count < blksize && 3195ec5883abSHorst Hummel rq_data_dir(req) == READ) 31961da177e4SLinus Torvalds memset(dst + count, 0xe5, 31971da177e4SLinus Torvalds blksize - count); 31981da177e4SLinus Torvalds } 31991da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 32001da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 32011da177e4SLinus Torvalds trkid, recoffs + 1, 32028e09f215SStefan Weinhuber 1, rcmd, basedev, count); 32031da177e4SLinus Torvalds } 32041da177e4SLinus Torvalds /* Locate record for standard blocks ? */ 32051da177e4SLinus Torvalds if (private->uses_cdl && recid == 2*blk_per_trk) { 32061da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 32071da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 32081da177e4SLinus Torvalds trkid, recoffs + 1, 32091da177e4SLinus Torvalds last_rec - recid + 1, 32108e09f215SStefan Weinhuber cmd, basedev, count); 32111da177e4SLinus Torvalds } 32121da177e4SLinus Torvalds /* Read/write ccw. */ 32131da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 32141da177e4SLinus Torvalds ccw->cmd_code = rcmd; 32151da177e4SLinus Torvalds ccw->count = count; 32161da177e4SLinus Torvalds if (idal_is_needed(dst, blksize)) { 32171da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) idaws; 32181da177e4SLinus Torvalds ccw->flags = CCW_FLAG_IDA; 32191da177e4SLinus Torvalds idaws = idal_create_words(idaws, dst, blksize); 32201da177e4SLinus Torvalds } else { 32211da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) dst; 32221da177e4SLinus Torvalds ccw->flags = 0; 32231da177e4SLinus Torvalds } 32241da177e4SLinus Torvalds ccw++; 32251da177e4SLinus Torvalds dst += blksize; 32261da177e4SLinus Torvalds recid++; 32271da177e4SLinus Torvalds } 32281da177e4SLinus Torvalds } 322913de227bSHolger Smolinski if (blk_noretry_request(req) || 323013de227bSHolger Smolinski block->base->features & DASD_FEATURE_FAILFAST) 32311c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 32328e09f215SStefan Weinhuber cqr->startdev = startdev; 32338e09f215SStefan Weinhuber cqr->memdev = startdev; 32348e09f215SStefan Weinhuber cqr->block = block; 32357c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 3236c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 32371f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 32381aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 32391da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 32401da177e4SLinus Torvalds return cqr; 32411da177e4SLinus Torvalds } 32421da177e4SLinus Torvalds 3243f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 3244f3eb5384SStefan Weinhuber struct dasd_device *startdev, 3245f3eb5384SStefan Weinhuber struct dasd_block *block, 3246f3eb5384SStefan Weinhuber struct request *req, 3247f3eb5384SStefan Weinhuber sector_t first_rec, 3248f3eb5384SStefan Weinhuber sector_t last_rec, 3249f3eb5384SStefan Weinhuber sector_t first_trk, 3250f3eb5384SStefan Weinhuber sector_t last_trk, 3251f3eb5384SStefan Weinhuber unsigned int first_offs, 3252f3eb5384SStefan Weinhuber unsigned int last_offs, 3253f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 3254f3eb5384SStefan Weinhuber unsigned int blksize) 3255f3eb5384SStefan Weinhuber { 3256f3eb5384SStefan Weinhuber unsigned long *idaws; 3257f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 3258f3eb5384SStefan Weinhuber struct ccw1 *ccw; 3259f3eb5384SStefan Weinhuber struct req_iterator iter; 32607988613bSKent Overstreet struct bio_vec bv; 3261f3eb5384SStefan Weinhuber char *dst, *idaw_dst; 3262f3eb5384SStefan Weinhuber unsigned int cidaw, cplength, datasize; 3263f3eb5384SStefan Weinhuber unsigned int tlf; 3264f3eb5384SStefan Weinhuber sector_t recid; 3265f3eb5384SStefan Weinhuber unsigned char cmd; 3266f3eb5384SStefan Weinhuber struct dasd_device *basedev; 3267f3eb5384SStefan Weinhuber unsigned int trkcount, count, count_to_trk_end; 3268f3eb5384SStefan Weinhuber unsigned int idaw_len, seg_len, part_len, len_to_track_end; 3269f3eb5384SStefan Weinhuber unsigned char new_track, end_idaw; 3270f3eb5384SStefan Weinhuber sector_t trkid; 3271f3eb5384SStefan Weinhuber unsigned int recoffs; 3272f3eb5384SStefan Weinhuber 3273f3eb5384SStefan Weinhuber basedev = block->base; 3274f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) 3275f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 3276f3eb5384SStefan Weinhuber else if (rq_data_dir(req) == WRITE) 3277f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 3278f3eb5384SStefan Weinhuber else 3279f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 3280f3eb5384SStefan Weinhuber 3281f3eb5384SStefan Weinhuber /* Track based I/O needs IDAWs for each page, and not just for 3282f3eb5384SStefan Weinhuber * 64 bit addresses. We need additional idals for pages 3283f3eb5384SStefan Weinhuber * that get filled from two tracks, so we use the number 3284f3eb5384SStefan Weinhuber * of records as upper limit. 3285f3eb5384SStefan Weinhuber */ 3286f3eb5384SStefan Weinhuber cidaw = last_rec - first_rec + 1; 3287f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 3288f3eb5384SStefan Weinhuber 3289f3eb5384SStefan Weinhuber /* 1x prefix + one read/write ccw per track */ 3290f3eb5384SStefan Weinhuber cplength = 1 + trkcount; 3291f3eb5384SStefan Weinhuber 3292f3eb5384SStefan Weinhuber /* on 31-bit we need space for two 32 bit addresses per page 3293f3eb5384SStefan Weinhuber * on 64-bit one 64 bit address 3294f3eb5384SStefan Weinhuber */ 3295f3eb5384SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 3296f3eb5384SStefan Weinhuber cidaw * sizeof(unsigned long long); 3297f3eb5384SStefan Weinhuber 3298f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 329968b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 330068b781feSStefan Haberland startdev); 3301f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 3302f3eb5384SStefan Weinhuber return cqr; 3303f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 3304f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 3305f3eb5384SStefan Weinhuber if (first_trk == last_trk) 3306f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 3307f3eb5384SStefan Weinhuber else 3308f3eb5384SStefan Weinhuber tlf = last_offs + 1; 3309f3eb5384SStefan Weinhuber tlf *= blksize; 3310f3eb5384SStefan Weinhuber 3311f3eb5384SStefan Weinhuber if (prefix_LRE(ccw++, cqr->data, first_trk, 3312f3eb5384SStefan Weinhuber last_trk, cmd, basedev, startdev, 3313f3eb5384SStefan Weinhuber 1 /* format */, first_offs + 1, 3314f3eb5384SStefan Weinhuber trkcount, blksize, 3315f3eb5384SStefan Weinhuber tlf) == -EAGAIN) { 3316f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 3317f3eb5384SStefan Weinhuber * Try again later. 3318f3eb5384SStefan Weinhuber */ 3319f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 3320f3eb5384SStefan Weinhuber return ERR_PTR(-EAGAIN); 3321f3eb5384SStefan Weinhuber } 3322f3eb5384SStefan Weinhuber 3323f3eb5384SStefan Weinhuber /* 3324f3eb5384SStefan Weinhuber * The translation of request into ccw programs must meet the 3325f3eb5384SStefan Weinhuber * following conditions: 3326f3eb5384SStefan Weinhuber * - all idaws but the first and the last must address full pages 3327f3eb5384SStefan Weinhuber * (or 2K blocks on 31-bit) 3328f3eb5384SStefan Weinhuber * - the scope of a ccw and it's idal ends with the track boundaries 3329f3eb5384SStefan Weinhuber */ 3330f3eb5384SStefan Weinhuber idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); 3331f3eb5384SStefan Weinhuber recid = first_rec; 3332f3eb5384SStefan Weinhuber new_track = 1; 3333f3eb5384SStefan Weinhuber end_idaw = 0; 3334f3eb5384SStefan Weinhuber len_to_track_end = 0; 3335246ccea1SMartin Schwidefsky idaw_dst = NULL; 3336f3eb5384SStefan Weinhuber idaw_len = 0; 3337f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 33387988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 33397988613bSKent Overstreet seg_len = bv.bv_len; 3340f3eb5384SStefan Weinhuber while (seg_len) { 3341f3eb5384SStefan Weinhuber if (new_track) { 3342f3eb5384SStefan Weinhuber trkid = recid; 3343f3eb5384SStefan Weinhuber recoffs = sector_div(trkid, blk_per_trk); 3344f3eb5384SStefan Weinhuber count_to_trk_end = blk_per_trk - recoffs; 3345f3eb5384SStefan Weinhuber count = min((last_rec - recid + 1), 3346f3eb5384SStefan Weinhuber (sector_t)count_to_trk_end); 3347f3eb5384SStefan Weinhuber len_to_track_end = count * blksize; 3348f3eb5384SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 3349f3eb5384SStefan Weinhuber ccw->cmd_code = cmd; 3350f3eb5384SStefan Weinhuber ccw->count = len_to_track_end; 3351f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 3352f3eb5384SStefan Weinhuber ccw->flags = CCW_FLAG_IDA; 3353f3eb5384SStefan Weinhuber ccw++; 3354f3eb5384SStefan Weinhuber recid += count; 3355f3eb5384SStefan Weinhuber new_track = 0; 335652db45c3SStefan Weinhuber /* first idaw for a ccw may start anywhere */ 335752db45c3SStefan Weinhuber if (!idaw_dst) 335852db45c3SStefan Weinhuber idaw_dst = dst; 3359f3eb5384SStefan Weinhuber } 336052db45c3SStefan Weinhuber /* If we start a new idaw, we must make sure that it 336152db45c3SStefan Weinhuber * starts on an IDA_BLOCK_SIZE boundary. 3362f3eb5384SStefan Weinhuber * If we continue an idaw, we must make sure that the 3363f3eb5384SStefan Weinhuber * current segment begins where the so far accumulated 3364f3eb5384SStefan Weinhuber * idaw ends 3365f3eb5384SStefan Weinhuber */ 336652db45c3SStefan Weinhuber if (!idaw_dst) { 336752db45c3SStefan Weinhuber if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { 336852db45c3SStefan Weinhuber dasd_sfree_request(cqr, startdev); 336952db45c3SStefan Weinhuber return ERR_PTR(-ERANGE); 337052db45c3SStefan Weinhuber } else 3371f3eb5384SStefan Weinhuber idaw_dst = dst; 337252db45c3SStefan Weinhuber } 3373f3eb5384SStefan Weinhuber if ((idaw_dst + idaw_len) != dst) { 3374f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 3375f3eb5384SStefan Weinhuber return ERR_PTR(-ERANGE); 3376f3eb5384SStefan Weinhuber } 3377f3eb5384SStefan Weinhuber part_len = min(seg_len, len_to_track_end); 3378f3eb5384SStefan Weinhuber seg_len -= part_len; 3379f3eb5384SStefan Weinhuber dst += part_len; 3380f3eb5384SStefan Weinhuber idaw_len += part_len; 3381f3eb5384SStefan Weinhuber len_to_track_end -= part_len; 3382f3eb5384SStefan Weinhuber /* collected memory area ends on an IDA_BLOCK border, 3383f3eb5384SStefan Weinhuber * -> create an idaw 3384f3eb5384SStefan Weinhuber * idal_create_words will handle cases where idaw_len 3385f3eb5384SStefan Weinhuber * is larger then IDA_BLOCK_SIZE 3386f3eb5384SStefan Weinhuber */ 3387f3eb5384SStefan Weinhuber if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) 3388f3eb5384SStefan Weinhuber end_idaw = 1; 3389f3eb5384SStefan Weinhuber /* We also need to end the idaw at track end */ 3390f3eb5384SStefan Weinhuber if (!len_to_track_end) { 3391f3eb5384SStefan Weinhuber new_track = 1; 3392f3eb5384SStefan Weinhuber end_idaw = 1; 3393f3eb5384SStefan Weinhuber } 3394f3eb5384SStefan Weinhuber if (end_idaw) { 3395f3eb5384SStefan Weinhuber idaws = idal_create_words(idaws, idaw_dst, 3396f3eb5384SStefan Weinhuber idaw_len); 3397246ccea1SMartin Schwidefsky idaw_dst = NULL; 3398f3eb5384SStefan Weinhuber idaw_len = 0; 3399f3eb5384SStefan Weinhuber end_idaw = 0; 3400f3eb5384SStefan Weinhuber } 3401f3eb5384SStefan Weinhuber } 3402f3eb5384SStefan Weinhuber } 3403f3eb5384SStefan Weinhuber 3404f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 3405f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 3406f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3407f3eb5384SStefan Weinhuber cqr->startdev = startdev; 3408f3eb5384SStefan Weinhuber cqr->memdev = startdev; 3409f3eb5384SStefan Weinhuber cqr->block = block; 34107c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 3411c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 34121f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 34131aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 3414f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 3415f3eb5384SStefan Weinhuber return cqr; 3416f3eb5384SStefan Weinhuber } 3417f3eb5384SStefan Weinhuber 3418f3eb5384SStefan Weinhuber static int prepare_itcw(struct itcw *itcw, 3419f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 3420f3eb5384SStefan Weinhuber struct dasd_device *basedev, 3421f3eb5384SStefan Weinhuber struct dasd_device *startdev, 3422f3eb5384SStefan Weinhuber unsigned int rec_on_trk, int count, 3423f3eb5384SStefan Weinhuber unsigned int blksize, 3424f3eb5384SStefan Weinhuber unsigned int total_data_size, 3425f3eb5384SStefan Weinhuber unsigned int tlf, 3426f3eb5384SStefan Weinhuber unsigned int blk_per_trk) 3427f3eb5384SStefan Weinhuber { 3428f3eb5384SStefan Weinhuber struct PFX_eckd_data pfxdata; 3429f3eb5384SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 3430f3eb5384SStefan Weinhuber struct DE_eckd_data *dedata; 3431f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 3432f3eb5384SStefan Weinhuber struct dcw *dcw; 3433f3eb5384SStefan Weinhuber 3434f3eb5384SStefan Weinhuber u32 begcyl, endcyl; 3435f3eb5384SStefan Weinhuber u16 heads, beghead, endhead; 3436f3eb5384SStefan Weinhuber u8 pfx_cmd; 3437f3eb5384SStefan Weinhuber 3438f3eb5384SStefan Weinhuber int rc = 0; 3439f3eb5384SStefan Weinhuber int sector = 0; 3440f3eb5384SStefan Weinhuber int dn, d; 3441f3eb5384SStefan Weinhuber 3442f3eb5384SStefan Weinhuber 3443f3eb5384SStefan Weinhuber /* setup prefix data */ 3444543691a4SSebastian Ott basepriv = basedev->private; 3445543691a4SSebastian Ott startpriv = startdev->private; 3446f3eb5384SStefan Weinhuber dedata = &pfxdata.define_extent; 3447f3eb5384SStefan Weinhuber lredata = &pfxdata.locate_record; 3448f3eb5384SStefan Weinhuber 3449f3eb5384SStefan Weinhuber memset(&pfxdata, 0, sizeof(pfxdata)); 3450f3eb5384SStefan Weinhuber pfxdata.format = 1; /* PFX with LRE */ 3451f3eb5384SStefan Weinhuber pfxdata.base_address = basepriv->ned->unit_addr; 3452f3eb5384SStefan Weinhuber pfxdata.base_lss = basepriv->ned->ID; 3453f3eb5384SStefan Weinhuber pfxdata.validity.define_extent = 1; 3454f3eb5384SStefan Weinhuber 3455f3eb5384SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 3456f3eb5384SStefan Weinhuber if (startpriv->uid.type != UA_BASE_DEVICE) { 3457f3eb5384SStefan Weinhuber pfxdata.validity.verify_base = 1; 3458f3eb5384SStefan Weinhuber if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 3459f3eb5384SStefan Weinhuber pfxdata.validity.hyper_pav = 1; 3460f3eb5384SStefan Weinhuber } 3461f3eb5384SStefan Weinhuber 3462f3eb5384SStefan Weinhuber switch (cmd) { 3463f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 3464f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 3465f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 3466f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 3467f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 3468f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 3469f3eb5384SStefan Weinhuber lredata->operation.operation = 0x0C; 3470f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x01; 3471f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX_READ; 3472f3eb5384SStefan Weinhuber break; 3473f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 3474f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 3475f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 3476f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 3477f3eb5384SStefan Weinhuber rc = check_XRC_on_prefix(&pfxdata, basedev); 3478f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 3479f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 3480f3eb5384SStefan Weinhuber lredata->operation.operation = 0x3F; 3481f3eb5384SStefan Weinhuber lredata->extended_operation = 0x23; 3482f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x2; 3483f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX; 3484f3eb5384SStefan Weinhuber break; 34858fd57520SJan Höppner case DASD_ECKD_CCW_READ_COUNT_MT: 34868fd57520SJan Höppner dedata->mask.perm = 0x1; 34878fd57520SJan Höppner dedata->attributes.operation = DASD_BYPASS_CACHE; 34888fd57520SJan Höppner dedata->ga_extended |= 0x42; 34898fd57520SJan Höppner dedata->blk_size = blksize; 34908fd57520SJan Höppner lredata->operation.orientation = 0x2; 34918fd57520SJan Höppner lredata->operation.operation = 0x16; 34928fd57520SJan Höppner lredata->auxiliary.check_bytes = 0x01; 34938fd57520SJan Höppner pfx_cmd = DASD_ECKD_CCW_PFX_READ; 34948fd57520SJan Höppner break; 3495f3eb5384SStefan Weinhuber default: 3496f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 3497f3eb5384SStefan Weinhuber "prepare itcw, unknown opcode 0x%x", cmd); 3498f3eb5384SStefan Weinhuber BUG(); 3499f3eb5384SStefan Weinhuber break; 3500f3eb5384SStefan Weinhuber } 3501f3eb5384SStefan Weinhuber if (rc) 3502f3eb5384SStefan Weinhuber return rc; 3503f3eb5384SStefan Weinhuber 3504f3eb5384SStefan Weinhuber dedata->attributes.mode = 0x3; /* ECKD */ 3505f3eb5384SStefan Weinhuber 3506f3eb5384SStefan Weinhuber heads = basepriv->rdc_data.trk_per_cyl; 3507f3eb5384SStefan Weinhuber begcyl = trk / heads; 3508f3eb5384SStefan Weinhuber beghead = trk % heads; 3509f3eb5384SStefan Weinhuber endcyl = totrk / heads; 3510f3eb5384SStefan Weinhuber endhead = totrk % heads; 3511f3eb5384SStefan Weinhuber 3512f3eb5384SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 3513f3eb5384SStefan Weinhuber if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 3514f3eb5384SStefan Weinhuber dedata->attributes.operation == DASD_SEQ_ACCESS) { 3515f3eb5384SStefan Weinhuber 3516f3eb5384SStefan Weinhuber if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 3517f3eb5384SStefan Weinhuber endcyl += basepriv->attrib.nr_cyl; 3518f3eb5384SStefan Weinhuber else 3519f3eb5384SStefan Weinhuber endcyl = (basepriv->real_cyl - 1); 3520f3eb5384SStefan Weinhuber } 3521f3eb5384SStefan Weinhuber 3522f3eb5384SStefan Weinhuber set_ch_t(&dedata->beg_ext, begcyl, beghead); 3523f3eb5384SStefan Weinhuber set_ch_t(&dedata->end_ext, endcyl, endhead); 3524f3eb5384SStefan Weinhuber 3525f3eb5384SStefan Weinhuber dedata->ep_format = 0x20; /* records per track is valid */ 3526f3eb5384SStefan Weinhuber dedata->ep_rec_per_track = blk_per_trk; 3527f3eb5384SStefan Weinhuber 3528f3eb5384SStefan Weinhuber if (rec_on_trk) { 3529f3eb5384SStefan Weinhuber switch (basepriv->rdc_data.dev_type) { 3530f3eb5384SStefan Weinhuber case 0x3390: 3531f3eb5384SStefan Weinhuber dn = ceil_quot(blksize + 6, 232); 3532f3eb5384SStefan Weinhuber d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); 3533f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 3534f3eb5384SStefan Weinhuber break; 3535f3eb5384SStefan Weinhuber case 0x3380: 3536f3eb5384SStefan Weinhuber d = 7 + ceil_quot(blksize + 12, 32); 3537f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 3538f3eb5384SStefan Weinhuber break; 3539f3eb5384SStefan Weinhuber } 3540f3eb5384SStefan Weinhuber } 3541f3eb5384SStefan Weinhuber 35428fd57520SJan Höppner if (cmd == DASD_ECKD_CCW_READ_COUNT_MT) { 35438fd57520SJan Höppner lredata->auxiliary.length_valid = 0; 35448fd57520SJan Höppner lredata->auxiliary.length_scope = 0; 35458fd57520SJan Höppner lredata->sector = 0xff; 35468fd57520SJan Höppner } else { 3547f3eb5384SStefan Weinhuber lredata->auxiliary.length_valid = 1; 3548f3eb5384SStefan Weinhuber lredata->auxiliary.length_scope = 1; 35498fd57520SJan Höppner lredata->sector = sector; 35508fd57520SJan Höppner } 3551f3eb5384SStefan Weinhuber lredata->auxiliary.imbedded_ccw_valid = 1; 3552f3eb5384SStefan Weinhuber lredata->length = tlf; 3553f3eb5384SStefan Weinhuber lredata->imbedded_ccw = cmd; 3554f3eb5384SStefan Weinhuber lredata->count = count; 3555f3eb5384SStefan Weinhuber set_ch_t(&lredata->seek_addr, begcyl, beghead); 3556f3eb5384SStefan Weinhuber lredata->search_arg.cyl = lredata->seek_addr.cyl; 3557f3eb5384SStefan Weinhuber lredata->search_arg.head = lredata->seek_addr.head; 3558f3eb5384SStefan Weinhuber lredata->search_arg.record = rec_on_trk; 3559f3eb5384SStefan Weinhuber 3560f3eb5384SStefan Weinhuber dcw = itcw_add_dcw(itcw, pfx_cmd, 0, 3561f3eb5384SStefan Weinhuber &pfxdata, sizeof(pfxdata), total_data_size); 356282a7b955SThomas Meyer return PTR_RET(dcw); 3563f3eb5384SStefan Weinhuber } 3564f3eb5384SStefan Weinhuber 3565f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 3566f3eb5384SStefan Weinhuber struct dasd_device *startdev, 3567f3eb5384SStefan Weinhuber struct dasd_block *block, 3568f3eb5384SStefan Weinhuber struct request *req, 3569f3eb5384SStefan Weinhuber sector_t first_rec, 3570f3eb5384SStefan Weinhuber sector_t last_rec, 3571f3eb5384SStefan Weinhuber sector_t first_trk, 3572f3eb5384SStefan Weinhuber sector_t last_trk, 3573f3eb5384SStefan Weinhuber unsigned int first_offs, 3574f3eb5384SStefan Weinhuber unsigned int last_offs, 3575f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 3576f3eb5384SStefan Weinhuber unsigned int blksize) 3577f3eb5384SStefan Weinhuber { 3578f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 3579f3eb5384SStefan Weinhuber struct req_iterator iter; 35807988613bSKent Overstreet struct bio_vec bv; 3581f3eb5384SStefan Weinhuber char *dst; 3582f3eb5384SStefan Weinhuber unsigned int trkcount, ctidaw; 3583f3eb5384SStefan Weinhuber unsigned char cmd; 3584f3eb5384SStefan Weinhuber struct dasd_device *basedev; 3585f3eb5384SStefan Weinhuber unsigned int tlf; 3586f3eb5384SStefan Weinhuber struct itcw *itcw; 3587f3eb5384SStefan Weinhuber struct tidaw *last_tidaw = NULL; 3588f3eb5384SStefan Weinhuber int itcw_op; 3589f3eb5384SStefan Weinhuber size_t itcw_size; 3590ef19298bSStefan Weinhuber u8 tidaw_flags; 3591ef19298bSStefan Weinhuber unsigned int seg_len, part_len, len_to_track_end; 3592ef19298bSStefan Weinhuber unsigned char new_track; 3593ef19298bSStefan Weinhuber sector_t recid, trkid; 3594ef19298bSStefan Weinhuber unsigned int offs; 3595ef19298bSStefan Weinhuber unsigned int count, count_to_trk_end; 3596cd10502bSJulia Lawall int ret; 3597f3eb5384SStefan Weinhuber 3598f3eb5384SStefan Weinhuber basedev = block->base; 3599f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) { 3600f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 3601f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_READ; 3602f3eb5384SStefan Weinhuber } else if (rq_data_dir(req) == WRITE) { 3603f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 3604f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_WRITE; 3605f3eb5384SStefan Weinhuber } else 3606f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 3607f3eb5384SStefan Weinhuber 3608f3eb5384SStefan Weinhuber /* trackbased I/O needs address all memory via TIDAWs, 3609f3eb5384SStefan Weinhuber * not just for 64 bit addresses. This allows us to map 3610f3eb5384SStefan Weinhuber * each segment directly to one tidaw. 3611ef19298bSStefan Weinhuber * In the case of write requests, additional tidaws may 3612ef19298bSStefan Weinhuber * be needed when a segment crosses a track boundary. 3613f3eb5384SStefan Weinhuber */ 3614f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 3615f3eb5384SStefan Weinhuber ctidaw = 0; 3616f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 3617f3eb5384SStefan Weinhuber ++ctidaw; 3618f3eb5384SStefan Weinhuber } 3619ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 3620ef19298bSStefan Weinhuber ctidaw += (last_trk - first_trk); 3621f3eb5384SStefan Weinhuber 3622f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 3623f3eb5384SStefan Weinhuber itcw_size = itcw_calc_size(0, ctidaw, 0); 362468b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 3625f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 3626f3eb5384SStefan Weinhuber return cqr; 3627f3eb5384SStefan Weinhuber 3628f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 3629f3eb5384SStefan Weinhuber if (first_trk == last_trk) 3630f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 3631f3eb5384SStefan Weinhuber else 3632f3eb5384SStefan Weinhuber tlf = last_offs + 1; 3633f3eb5384SStefan Weinhuber tlf *= blksize; 3634f3eb5384SStefan Weinhuber 3635f3eb5384SStefan Weinhuber itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); 3636ef19298bSStefan Weinhuber if (IS_ERR(itcw)) { 3637cd10502bSJulia Lawall ret = -EINVAL; 3638cd10502bSJulia Lawall goto out_error; 3639ef19298bSStefan Weinhuber } 3640f3eb5384SStefan Weinhuber cqr->cpaddr = itcw_get_tcw(itcw); 3641f3eb5384SStefan Weinhuber if (prepare_itcw(itcw, first_trk, last_trk, 3642f3eb5384SStefan Weinhuber cmd, basedev, startdev, 3643f3eb5384SStefan Weinhuber first_offs + 1, 3644f3eb5384SStefan Weinhuber trkcount, blksize, 3645f3eb5384SStefan Weinhuber (last_rec - first_rec + 1) * blksize, 3646f3eb5384SStefan Weinhuber tlf, blk_per_trk) == -EAGAIN) { 3647f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 3648f3eb5384SStefan Weinhuber * Try again later. 3649f3eb5384SStefan Weinhuber */ 3650cd10502bSJulia Lawall ret = -EAGAIN; 3651cd10502bSJulia Lawall goto out_error; 3652f3eb5384SStefan Weinhuber } 3653d54cddb6SHeiko Carstens len_to_track_end = 0; 3654f3eb5384SStefan Weinhuber /* 3655f3eb5384SStefan Weinhuber * A tidaw can address 4k of memory, but must not cross page boundaries 3656f3eb5384SStefan Weinhuber * We can let the block layer handle this by setting 3657f3eb5384SStefan Weinhuber * blk_queue_segment_boundary to page boundaries and 3658f3eb5384SStefan Weinhuber * blk_max_segment_size to page size when setting up the request queue. 3659ef19298bSStefan Weinhuber * For write requests, a TIDAW must not cross track boundaries, because 3660ef19298bSStefan Weinhuber * we have to set the CBC flag on the last tidaw for each track. 3661f3eb5384SStefan Weinhuber */ 3662ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) { 3663ef19298bSStefan Weinhuber new_track = 1; 3664ef19298bSStefan Weinhuber recid = first_rec; 3665f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 36667988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 36677988613bSKent Overstreet seg_len = bv.bv_len; 3668ef19298bSStefan Weinhuber while (seg_len) { 3669ef19298bSStefan Weinhuber if (new_track) { 3670ef19298bSStefan Weinhuber trkid = recid; 3671ef19298bSStefan Weinhuber offs = sector_div(trkid, blk_per_trk); 3672ef19298bSStefan Weinhuber count_to_trk_end = blk_per_trk - offs; 3673ef19298bSStefan Weinhuber count = min((last_rec - recid + 1), 3674ef19298bSStefan Weinhuber (sector_t)count_to_trk_end); 3675ef19298bSStefan Weinhuber len_to_track_end = count * blksize; 3676ef19298bSStefan Weinhuber recid += count; 3677ef19298bSStefan Weinhuber new_track = 0; 3678f3eb5384SStefan Weinhuber } 3679ef19298bSStefan Weinhuber part_len = min(seg_len, len_to_track_end); 3680ef19298bSStefan Weinhuber seg_len -= part_len; 3681ef19298bSStefan Weinhuber len_to_track_end -= part_len; 3682ef19298bSStefan Weinhuber /* We need to end the tidaw at track end */ 3683ef19298bSStefan Weinhuber if (!len_to_track_end) { 3684ef19298bSStefan Weinhuber new_track = 1; 3685ef19298bSStefan Weinhuber tidaw_flags = TIDAW_FLAGS_INSERT_CBC; 3686ef19298bSStefan Weinhuber } else 3687ef19298bSStefan Weinhuber tidaw_flags = 0; 3688ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, 3689ef19298bSStefan Weinhuber dst, part_len); 3690cd10502bSJulia Lawall if (IS_ERR(last_tidaw)) { 3691cd10502bSJulia Lawall ret = -EINVAL; 3692cd10502bSJulia Lawall goto out_error; 3693cd10502bSJulia Lawall } 3694ef19298bSStefan Weinhuber dst += part_len; 3695ef19298bSStefan Weinhuber } 3696ef19298bSStefan Weinhuber } 3697ef19298bSStefan Weinhuber } else { 3698ef19298bSStefan Weinhuber rq_for_each_segment(bv, req, iter) { 36997988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 3700ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, 0x00, 37017988613bSKent Overstreet dst, bv.bv_len); 3702cd10502bSJulia Lawall if (IS_ERR(last_tidaw)) { 3703cd10502bSJulia Lawall ret = -EINVAL; 3704cd10502bSJulia Lawall goto out_error; 3705cd10502bSJulia Lawall } 3706ef19298bSStefan Weinhuber } 3707ef19298bSStefan Weinhuber } 3708ef19298bSStefan Weinhuber last_tidaw->flags |= TIDAW_FLAGS_LAST; 3709ef19298bSStefan Weinhuber last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; 3710f3eb5384SStefan Weinhuber itcw_finalize(itcw); 3711f3eb5384SStefan Weinhuber 3712f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 3713f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 3714f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3715ef19298bSStefan Weinhuber cqr->cpmode = 1; 3716f3eb5384SStefan Weinhuber cqr->startdev = startdev; 3717f3eb5384SStefan Weinhuber cqr->memdev = startdev; 3718f3eb5384SStefan Weinhuber cqr->block = block; 37197c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 3720c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 37211f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 37221aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 3723f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 3724f3eb5384SStefan Weinhuber return cqr; 3725cd10502bSJulia Lawall out_error: 3726cd10502bSJulia Lawall dasd_sfree_request(cqr, startdev); 3727cd10502bSJulia Lawall return ERR_PTR(ret); 3728f3eb5384SStefan Weinhuber } 3729f3eb5384SStefan Weinhuber 3730f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 3731f3eb5384SStefan Weinhuber struct dasd_block *block, 3732f3eb5384SStefan Weinhuber struct request *req) 3733f3eb5384SStefan Weinhuber { 3734ef19298bSStefan Weinhuber int cmdrtd, cmdwtd; 3735f3eb5384SStefan Weinhuber int use_prefix; 3736ef19298bSStefan Weinhuber int fcx_multitrack; 373745b44d76SStefan Weinhuber struct dasd_eckd_private *private; 3738f3eb5384SStefan Weinhuber struct dasd_device *basedev; 3739f3eb5384SStefan Weinhuber sector_t first_rec, last_rec; 3740f3eb5384SStefan Weinhuber sector_t first_trk, last_trk; 3741f3eb5384SStefan Weinhuber unsigned int first_offs, last_offs; 3742f3eb5384SStefan Weinhuber unsigned int blk_per_trk, blksize; 3743f3eb5384SStefan Weinhuber int cdlspecial; 3744ef19298bSStefan Weinhuber unsigned int data_size; 3745f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 3746f3eb5384SStefan Weinhuber 3747f3eb5384SStefan Weinhuber basedev = block->base; 3748543691a4SSebastian Ott private = basedev->private; 3749f3eb5384SStefan Weinhuber 3750f3eb5384SStefan Weinhuber /* Calculate number of blocks/records per track. */ 3751f3eb5384SStefan Weinhuber blksize = block->bp_block; 3752f3eb5384SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 37536fca97a9SStefan Haberland if (blk_per_trk == 0) 37546fca97a9SStefan Haberland return ERR_PTR(-EINVAL); 3755f3eb5384SStefan Weinhuber /* Calculate record id of first and last block. */ 375683096ebfSTejun Heo first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; 3757f3eb5384SStefan Weinhuber first_offs = sector_div(first_trk, blk_per_trk); 3758f3eb5384SStefan Weinhuber last_rec = last_trk = 375983096ebfSTejun Heo (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 3760f3eb5384SStefan Weinhuber last_offs = sector_div(last_trk, blk_per_trk); 3761f3eb5384SStefan Weinhuber cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); 3762f3eb5384SStefan Weinhuber 3763ef19298bSStefan Weinhuber fcx_multitrack = private->features.feature[40] & 0x20; 3764ef19298bSStefan Weinhuber data_size = blk_rq_bytes(req); 376526a35f37SStefan Weinhuber if (data_size % blksize) 376626a35f37SStefan Weinhuber return ERR_PTR(-EINVAL); 3767ef19298bSStefan Weinhuber /* tpm write request add CBC data on each track boundary */ 3768ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 3769ef19298bSStefan Weinhuber data_size += (last_trk - first_trk) * 4; 3770f3eb5384SStefan Weinhuber 3771f3eb5384SStefan Weinhuber /* is read track data and write track data in command mode supported? */ 3772f3eb5384SStefan Weinhuber cmdrtd = private->features.feature[9] & 0x20; 3773f3eb5384SStefan Weinhuber cmdwtd = private->features.feature[12] & 0x40; 3774f3eb5384SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 3775f3eb5384SStefan Weinhuber 3776f3eb5384SStefan Weinhuber cqr = NULL; 3777f3eb5384SStefan Weinhuber if (cdlspecial || dasd_page_cache) { 3778f3eb5384SStefan Weinhuber /* do nothing, just fall through to the cmd mode single case */ 3779ef19298bSStefan Weinhuber } else if ((data_size <= private->fcx_max_data) 3780ef19298bSStefan Weinhuber && (fcx_multitrack || (first_trk == last_trk))) { 3781f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, 3782f3eb5384SStefan Weinhuber first_rec, last_rec, 3783f3eb5384SStefan Weinhuber first_trk, last_trk, 3784f3eb5384SStefan Weinhuber first_offs, last_offs, 3785f3eb5384SStefan Weinhuber blk_per_trk, blksize); 3786ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3787ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 3788f3eb5384SStefan Weinhuber cqr = NULL; 3789f3eb5384SStefan Weinhuber } else if (use_prefix && 3790f3eb5384SStefan Weinhuber (((rq_data_dir(req) == READ) && cmdrtd) || 3791f3eb5384SStefan Weinhuber ((rq_data_dir(req) == WRITE) && cmdwtd))) { 3792f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, 3793f3eb5384SStefan Weinhuber first_rec, last_rec, 3794f3eb5384SStefan Weinhuber first_trk, last_trk, 3795f3eb5384SStefan Weinhuber first_offs, last_offs, 3796f3eb5384SStefan Weinhuber blk_per_trk, blksize); 3797ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3798ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 3799f3eb5384SStefan Weinhuber cqr = NULL; 3800f3eb5384SStefan Weinhuber } 3801f3eb5384SStefan Weinhuber if (!cqr) 3802f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, 3803f3eb5384SStefan Weinhuber first_rec, last_rec, 3804f3eb5384SStefan Weinhuber first_trk, last_trk, 3805f3eb5384SStefan Weinhuber first_offs, last_offs, 3806f3eb5384SStefan Weinhuber blk_per_trk, blksize); 3807f3eb5384SStefan Weinhuber return cqr; 3808f3eb5384SStefan Weinhuber } 3809f3eb5384SStefan Weinhuber 3810e4dbb0f2SStefan Haberland static struct dasd_ccw_req *dasd_raw_build_cp(struct dasd_device *startdev, 3811e4dbb0f2SStefan Haberland struct dasd_block *block, 3812e4dbb0f2SStefan Haberland struct request *req) 3813e4dbb0f2SStefan Haberland { 3814e4dbb0f2SStefan Haberland unsigned long *idaws; 3815e4dbb0f2SStefan Haberland struct dasd_device *basedev; 3816e4dbb0f2SStefan Haberland struct dasd_ccw_req *cqr; 3817e4dbb0f2SStefan Haberland struct ccw1 *ccw; 3818e4dbb0f2SStefan Haberland struct req_iterator iter; 38197988613bSKent Overstreet struct bio_vec bv; 3820e4dbb0f2SStefan Haberland char *dst; 3821e4dbb0f2SStefan Haberland unsigned char cmd; 3822e4dbb0f2SStefan Haberland unsigned int trkcount; 3823e4dbb0f2SStefan Haberland unsigned int seg_len, len_to_track_end; 3824e4dbb0f2SStefan Haberland unsigned int first_offs; 3825e4dbb0f2SStefan Haberland unsigned int cidaw, cplength, datasize; 3826558b9ef0SStefan Weinhuber sector_t first_trk, last_trk, sectors; 3827558b9ef0SStefan Weinhuber sector_t start_padding_sectors, end_sector_offset, end_padding_sectors; 3828e4dbb0f2SStefan Haberland unsigned int pfx_datasize; 3829e4dbb0f2SStefan Haberland 3830e4dbb0f2SStefan Haberland /* 3831e4dbb0f2SStefan Haberland * raw track access needs to be mutiple of 64k and on 64k boundary 3832558b9ef0SStefan Weinhuber * For read requests we can fix an incorrect alignment by padding 3833558b9ef0SStefan Weinhuber * the request with dummy pages. 3834e4dbb0f2SStefan Haberland */ 3835558b9ef0SStefan Weinhuber start_padding_sectors = blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK; 3836558b9ef0SStefan Weinhuber end_sector_offset = (blk_rq_pos(req) + blk_rq_sectors(req)) % 3837558b9ef0SStefan Weinhuber DASD_RAW_SECTORS_PER_TRACK; 3838558b9ef0SStefan Weinhuber end_padding_sectors = (DASD_RAW_SECTORS_PER_TRACK - end_sector_offset) % 3839558b9ef0SStefan Weinhuber DASD_RAW_SECTORS_PER_TRACK; 3840558b9ef0SStefan Weinhuber basedev = block->base; 3841558b9ef0SStefan Weinhuber if ((start_padding_sectors || end_padding_sectors) && 3842558b9ef0SStefan Weinhuber (rq_data_dir(req) == WRITE)) { 3843558b9ef0SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 3844558b9ef0SStefan Weinhuber "raw write not track aligned (%lu,%lu) req %p", 3845558b9ef0SStefan Weinhuber start_padding_sectors, end_padding_sectors, req); 3846e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EINVAL); 3847e4dbb0f2SStefan Haberland goto out; 3848e4dbb0f2SStefan Haberland } 3849e4dbb0f2SStefan Haberland 3850e4dbb0f2SStefan Haberland first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; 3851e4dbb0f2SStefan Haberland last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / 3852e4dbb0f2SStefan Haberland DASD_RAW_SECTORS_PER_TRACK; 3853e4dbb0f2SStefan Haberland trkcount = last_trk - first_trk + 1; 3854e4dbb0f2SStefan Haberland first_offs = 0; 3855e4dbb0f2SStefan Haberland 3856e4dbb0f2SStefan Haberland if (rq_data_dir(req) == READ) 3857e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_READ_TRACK; 3858e4dbb0f2SStefan Haberland else if (rq_data_dir(req) == WRITE) 3859e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; 3860e4dbb0f2SStefan Haberland else { 3861e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EINVAL); 3862e4dbb0f2SStefan Haberland goto out; 3863e4dbb0f2SStefan Haberland } 3864e4dbb0f2SStefan Haberland 3865e4dbb0f2SStefan Haberland /* 3866e4dbb0f2SStefan Haberland * Raw track based I/O needs IDAWs for each page, 3867e4dbb0f2SStefan Haberland * and not just for 64 bit addresses. 3868e4dbb0f2SStefan Haberland */ 3869e4dbb0f2SStefan Haberland cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; 3870e4dbb0f2SStefan Haberland 3871e4dbb0f2SStefan Haberland /* 1x prefix + one read/write ccw per track */ 3872e4dbb0f2SStefan Haberland cplength = 1 + trkcount; 3873e4dbb0f2SStefan Haberland 3874e4dbb0f2SStefan Haberland /* 3875e4dbb0f2SStefan Haberland * struct PFX_eckd_data has up to 2 byte as extended parameter 3876e4dbb0f2SStefan Haberland * this is needed for write full track and has to be mentioned 387725985edcSLucas De Marchi * separately 3878e4dbb0f2SStefan Haberland * add 8 instead of 2 to keep 8 byte boundary 3879e4dbb0f2SStefan Haberland */ 3880e4dbb0f2SStefan Haberland pfx_datasize = sizeof(struct PFX_eckd_data) + 8; 3881e4dbb0f2SStefan Haberland 3882e4dbb0f2SStefan Haberland datasize = pfx_datasize + cidaw * sizeof(unsigned long long); 3883e4dbb0f2SStefan Haberland 3884e4dbb0f2SStefan Haberland /* Allocate the ccw request. */ 3885e4dbb0f2SStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 3886e4dbb0f2SStefan Haberland datasize, startdev); 3887e4dbb0f2SStefan Haberland if (IS_ERR(cqr)) 3888e4dbb0f2SStefan Haberland goto out; 3889e4dbb0f2SStefan Haberland ccw = cqr->cpaddr; 3890e4dbb0f2SStefan Haberland 3891e4dbb0f2SStefan Haberland if (prefix_LRE(ccw++, cqr->data, first_trk, last_trk, cmd, 3892e4dbb0f2SStefan Haberland basedev, startdev, 1 /* format */, first_offs + 1, 3893e4dbb0f2SStefan Haberland trkcount, 0, 0) == -EAGAIN) { 3894e4dbb0f2SStefan Haberland /* Clock not in sync and XRC is enabled. 3895e4dbb0f2SStefan Haberland * Try again later. 3896e4dbb0f2SStefan Haberland */ 3897e4dbb0f2SStefan Haberland dasd_sfree_request(cqr, startdev); 3898e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EAGAIN); 3899e4dbb0f2SStefan Haberland goto out; 3900e4dbb0f2SStefan Haberland } 3901e4dbb0f2SStefan Haberland 3902e4dbb0f2SStefan Haberland idaws = (unsigned long *)(cqr->data + pfx_datasize); 3903e4dbb0f2SStefan Haberland len_to_track_end = 0; 3904558b9ef0SStefan Weinhuber if (start_padding_sectors) { 3905558b9ef0SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 3906558b9ef0SStefan Weinhuber ccw->cmd_code = cmd; 3907558b9ef0SStefan Weinhuber /* maximum 3390 track size */ 3908558b9ef0SStefan Weinhuber ccw->count = 57326; 3909558b9ef0SStefan Weinhuber /* 64k map to one track */ 3910558b9ef0SStefan Weinhuber len_to_track_end = 65536 - start_padding_sectors * 512; 3911558b9ef0SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 3912558b9ef0SStefan Weinhuber ccw->flags |= CCW_FLAG_IDA; 3913558b9ef0SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3914558b9ef0SStefan Weinhuber ccw++; 3915558b9ef0SStefan Weinhuber for (sectors = 0; sectors < start_padding_sectors; sectors += 8) 3916558b9ef0SStefan Weinhuber idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 3917558b9ef0SStefan Weinhuber } 3918e4dbb0f2SStefan Haberland rq_for_each_segment(bv, req, iter) { 39197988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 39207988613bSKent Overstreet seg_len = bv.bv_len; 3921558b9ef0SStefan Weinhuber if (cmd == DASD_ECKD_CCW_READ_TRACK) 3922558b9ef0SStefan Weinhuber memset(dst, 0, seg_len); 3923e4dbb0f2SStefan Haberland if (!len_to_track_end) { 3924e4dbb0f2SStefan Haberland ccw[-1].flags |= CCW_FLAG_CC; 3925e4dbb0f2SStefan Haberland ccw->cmd_code = cmd; 3926e4dbb0f2SStefan Haberland /* maximum 3390 track size */ 3927e4dbb0f2SStefan Haberland ccw->count = 57326; 3928e4dbb0f2SStefan Haberland /* 64k map to one track */ 3929e4dbb0f2SStefan Haberland len_to_track_end = 65536; 3930e4dbb0f2SStefan Haberland ccw->cda = (__u32)(addr_t)idaws; 3931e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_IDA; 3932e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 3933e4dbb0f2SStefan Haberland ccw++; 3934e4dbb0f2SStefan Haberland } 3935e4dbb0f2SStefan Haberland len_to_track_end -= seg_len; 3936e4dbb0f2SStefan Haberland idaws = idal_create_words(idaws, dst, seg_len); 3937e4dbb0f2SStefan Haberland } 3938558b9ef0SStefan Weinhuber for (sectors = 0; sectors < end_padding_sectors; sectors += 8) 3939558b9ef0SStefan Weinhuber idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 3940e4dbb0f2SStefan Haberland if (blk_noretry_request(req) || 3941e4dbb0f2SStefan Haberland block->base->features & DASD_FEATURE_FAILFAST) 3942e4dbb0f2SStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3943e4dbb0f2SStefan Haberland cqr->startdev = startdev; 3944e4dbb0f2SStefan Haberland cqr->memdev = startdev; 3945e4dbb0f2SStefan Haberland cqr->block = block; 3946e4dbb0f2SStefan Haberland cqr->expires = startdev->default_expires * HZ; 3947c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 39481f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 39491aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 3950e4dbb0f2SStefan Haberland cqr->status = DASD_CQR_FILLED; 3951e4dbb0f2SStefan Haberland 3952e4dbb0f2SStefan Haberland if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN) 3953e4dbb0f2SStefan Haberland cqr = NULL; 3954e4dbb0f2SStefan Haberland out: 3955e4dbb0f2SStefan Haberland return cqr; 3956e4dbb0f2SStefan Haberland } 3957e4dbb0f2SStefan Haberland 3958e4dbb0f2SStefan Haberland 39591da177e4SLinus Torvalds static int 39601da177e4SLinus Torvalds dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 39611da177e4SLinus Torvalds { 39621da177e4SLinus Torvalds struct dasd_eckd_private *private; 39631da177e4SLinus Torvalds struct ccw1 *ccw; 39645705f702SNeilBrown struct req_iterator iter; 39657988613bSKent Overstreet struct bio_vec bv; 39661da177e4SLinus Torvalds char *dst, *cda; 39671da177e4SLinus Torvalds unsigned int blksize, blk_per_trk, off; 39681da177e4SLinus Torvalds sector_t recid; 39695705f702SNeilBrown int status; 39701da177e4SLinus Torvalds 39711da177e4SLinus Torvalds if (!dasd_page_cache) 39721da177e4SLinus Torvalds goto out; 3973543691a4SSebastian Ott private = cqr->block->base->private; 39748e09f215SStefan Weinhuber blksize = cqr->block->bp_block; 39751da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 397683096ebfSTejun Heo recid = blk_rq_pos(req) >> cqr->block->s2b_shift; 39771da177e4SLinus Torvalds ccw = cqr->cpaddr; 39781da177e4SLinus Torvalds /* Skip over define extent & locate record. */ 39791da177e4SLinus Torvalds ccw++; 39801da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 39811da177e4SLinus Torvalds ccw++; 39825705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 39837988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 39847988613bSKent Overstreet for (off = 0; off < bv.bv_len; off += blksize) { 39851da177e4SLinus Torvalds /* Skip locate record. */ 39861da177e4SLinus Torvalds if (private->uses_cdl && recid <= 2*blk_per_trk) 39871da177e4SLinus Torvalds ccw++; 39881da177e4SLinus Torvalds if (dst) { 39891da177e4SLinus Torvalds if (ccw->flags & CCW_FLAG_IDA) 39901da177e4SLinus Torvalds cda = *((char **)((addr_t) ccw->cda)); 39911da177e4SLinus Torvalds else 39921da177e4SLinus Torvalds cda = (char *)((addr_t) ccw->cda); 39931da177e4SLinus Torvalds if (dst != cda) { 39941da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 39957988613bSKent Overstreet memcpy(dst, cda, bv.bv_len); 39961da177e4SLinus Torvalds kmem_cache_free(dasd_page_cache, 39971da177e4SLinus Torvalds (void *)((addr_t)cda & PAGE_MASK)); 39981da177e4SLinus Torvalds } 39991da177e4SLinus Torvalds dst = NULL; 40001da177e4SLinus Torvalds } 40011da177e4SLinus Torvalds ccw++; 40021da177e4SLinus Torvalds recid++; 40031da177e4SLinus Torvalds } 40041da177e4SLinus Torvalds } 40051da177e4SLinus Torvalds out: 40061da177e4SLinus Torvalds status = cqr->status == DASD_CQR_DONE; 40078e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 40081da177e4SLinus Torvalds return status; 40091da177e4SLinus Torvalds } 40101da177e4SLinus Torvalds 40118e09f215SStefan Weinhuber /* 4012f3eb5384SStefan Weinhuber * Modify ccw/tcw in cqr so it can be started on a base device. 40138e09f215SStefan Weinhuber * 40148e09f215SStefan Weinhuber * Note that this is not enough to restart the cqr! 40158e09f215SStefan Weinhuber * Either reset cqr->startdev as well (summary unit check handling) 40168e09f215SStefan Weinhuber * or restart via separate cqr (as in ERP handling). 40178e09f215SStefan Weinhuber */ 40188e09f215SStefan Weinhuber void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 40198e09f215SStefan Weinhuber { 40208e09f215SStefan Weinhuber struct ccw1 *ccw; 40218e09f215SStefan Weinhuber struct PFX_eckd_data *pfxdata; 4022f3eb5384SStefan Weinhuber struct tcw *tcw; 4023f3eb5384SStefan Weinhuber struct tccb *tccb; 4024f3eb5384SStefan Weinhuber struct dcw *dcw; 40258e09f215SStefan Weinhuber 4026f3eb5384SStefan Weinhuber if (cqr->cpmode == 1) { 4027f3eb5384SStefan Weinhuber tcw = cqr->cpaddr; 4028f3eb5384SStefan Weinhuber tccb = tcw_get_tccb(tcw); 4029f3eb5384SStefan Weinhuber dcw = (struct dcw *)&tccb->tca[0]; 4030f3eb5384SStefan Weinhuber pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; 4031f3eb5384SStefan Weinhuber pfxdata->validity.verify_base = 0; 4032f3eb5384SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 4033f3eb5384SStefan Weinhuber } else { 40348e09f215SStefan Weinhuber ccw = cqr->cpaddr; 40358e09f215SStefan Weinhuber pfxdata = cqr->data; 40368e09f215SStefan Weinhuber if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 40378e09f215SStefan Weinhuber pfxdata->validity.verify_base = 0; 40388e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 40398e09f215SStefan Weinhuber } 40408e09f215SStefan Weinhuber } 4041f3eb5384SStefan Weinhuber } 40428e09f215SStefan Weinhuber 40438e09f215SStefan Weinhuber #define DASD_ECKD_CHANQ_MAX_SIZE 4 40448e09f215SStefan Weinhuber 40458e09f215SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 40468e09f215SStefan Weinhuber struct dasd_block *block, 40478e09f215SStefan Weinhuber struct request *req) 40488e09f215SStefan Weinhuber { 40498e09f215SStefan Weinhuber struct dasd_eckd_private *private; 40508e09f215SStefan Weinhuber struct dasd_device *startdev; 40518e09f215SStefan Weinhuber unsigned long flags; 40528e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 40538e09f215SStefan Weinhuber 40548e09f215SStefan Weinhuber startdev = dasd_alias_get_start_dev(base); 40558e09f215SStefan Weinhuber if (!startdev) 40568e09f215SStefan Weinhuber startdev = base; 4057543691a4SSebastian Ott private = startdev->private; 40588e09f215SStefan Weinhuber if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 40598e09f215SStefan Weinhuber return ERR_PTR(-EBUSY); 40608e09f215SStefan Weinhuber 40618e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 40628e09f215SStefan Weinhuber private->count++; 4063e4dbb0f2SStefan Haberland if ((base->features & DASD_FEATURE_USERAW)) 4064e4dbb0f2SStefan Haberland cqr = dasd_raw_build_cp(startdev, block, req); 4065e4dbb0f2SStefan Haberland else 40668e09f215SStefan Weinhuber cqr = dasd_eckd_build_cp(startdev, block, req); 40678e09f215SStefan Weinhuber if (IS_ERR(cqr)) 40688e09f215SStefan Weinhuber private->count--; 40698e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 40708e09f215SStefan Weinhuber return cqr; 40718e09f215SStefan Weinhuber } 40728e09f215SStefan Weinhuber 40738e09f215SStefan Weinhuber static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 40748e09f215SStefan Weinhuber struct request *req) 40758e09f215SStefan Weinhuber { 40768e09f215SStefan Weinhuber struct dasd_eckd_private *private; 40778e09f215SStefan Weinhuber unsigned long flags; 40788e09f215SStefan Weinhuber 40798e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 4080543691a4SSebastian Ott private = cqr->memdev->private; 40818e09f215SStefan Weinhuber private->count--; 40828e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 40838e09f215SStefan Weinhuber return dasd_eckd_free_cp(cqr, req); 40848e09f215SStefan Weinhuber } 40858e09f215SStefan Weinhuber 40861da177e4SLinus Torvalds static int 40871da177e4SLinus Torvalds dasd_eckd_fill_info(struct dasd_device * device, 40881da177e4SLinus Torvalds struct dasd_information2_t * info) 40891da177e4SLinus Torvalds { 4090543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 40911da177e4SLinus Torvalds 40921da177e4SLinus Torvalds info->label_block = 2; 40931da177e4SLinus Torvalds info->FBA_layout = private->uses_cdl ? 0 : 1; 40941da177e4SLinus Torvalds info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 4095543691a4SSebastian Ott info->characteristics_size = sizeof(private->rdc_data); 40961da177e4SLinus Torvalds memcpy(info->characteristics, &private->rdc_data, 4097543691a4SSebastian Ott sizeof(private->rdc_data)); 40984abb08c2SStefan Weinhuber info->confdata_size = min((unsigned long)private->conf_len, 40994abb08c2SStefan Weinhuber sizeof(info->configuration_data)); 41004abb08c2SStefan Weinhuber memcpy(info->configuration_data, private->conf_data, 41014abb08c2SStefan Weinhuber info->confdata_size); 41021da177e4SLinus Torvalds return 0; 41031da177e4SLinus Torvalds } 41041da177e4SLinus Torvalds 41051da177e4SLinus Torvalds /* 41061da177e4SLinus Torvalds * SECTION: ioctl functions for eckd devices. 41071da177e4SLinus Torvalds */ 41081da177e4SLinus Torvalds 41091da177e4SLinus Torvalds /* 41101da177e4SLinus Torvalds * Release device ioctl. 41111da177e4SLinus Torvalds * Buils a channel programm to releases a prior reserved 41121da177e4SLinus Torvalds * (see dasd_eckd_reserve) device. 41131da177e4SLinus Torvalds */ 41141da177e4SLinus Torvalds static int 41151107ccfbSChristoph Hellwig dasd_eckd_release(struct dasd_device *device) 41161da177e4SLinus Torvalds { 41171da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 41181da177e4SLinus Torvalds int rc; 4119f3eb5384SStefan Weinhuber struct ccw1 *ccw; 4120f932bceaSStefan Weinhuber int useglobal; 41211da177e4SLinus Torvalds 41221da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 41231da177e4SLinus Torvalds return -EACCES; 41241da177e4SLinus Torvalds 4125f932bceaSStefan Weinhuber useglobal = 0; 412668b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 41271da177e4SLinus Torvalds if (IS_ERR(cqr)) { 4128f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 4129f932bceaSStefan Weinhuber useglobal = 1; 4130f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 4131f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 4132f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 4133f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 4134f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 4135f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 4136f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 41371da177e4SLinus Torvalds } 4138f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 4139f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RELEASE; 4140f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4141f3eb5384SStefan Weinhuber ccw->count = 32; 4142f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 41438e09f215SStefan Weinhuber cqr->startdev = device; 41448e09f215SStefan Weinhuber cqr->memdev = device; 41451da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 41461c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4147336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 41481da177e4SLinus Torvalds cqr->expires = 2 * HZ; 41491aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 41501da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 41511da177e4SLinus Torvalds 41521da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 41535a27e60dSStefan Weinhuber if (!rc) 41545a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 41551da177e4SLinus Torvalds 4156f932bceaSStefan Weinhuber if (useglobal) 4157f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 4158f932bceaSStefan Weinhuber else 41598e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 41601da177e4SLinus Torvalds return rc; 41611da177e4SLinus Torvalds } 41621da177e4SLinus Torvalds 41631da177e4SLinus Torvalds /* 41641da177e4SLinus Torvalds * Reserve device ioctl. 41651da177e4SLinus Torvalds * Options are set to 'synchronous wait for interrupt' and 41661da177e4SLinus Torvalds * 'timeout the request'. This leads to a terminate IO if 41671da177e4SLinus Torvalds * the interrupt is outstanding for a certain time. 41681da177e4SLinus Torvalds */ 41691da177e4SLinus Torvalds static int 41701107ccfbSChristoph Hellwig dasd_eckd_reserve(struct dasd_device *device) 41711da177e4SLinus Torvalds { 41721da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 41731da177e4SLinus Torvalds int rc; 4174f3eb5384SStefan Weinhuber struct ccw1 *ccw; 4175f932bceaSStefan Weinhuber int useglobal; 41761da177e4SLinus Torvalds 41771da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 41781da177e4SLinus Torvalds return -EACCES; 41791da177e4SLinus Torvalds 4180f932bceaSStefan Weinhuber useglobal = 0; 418168b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 41821da177e4SLinus Torvalds if (IS_ERR(cqr)) { 4183f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 4184f932bceaSStefan Weinhuber useglobal = 1; 4185f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 4186f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 4187f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 4188f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 4189f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 4190f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 4191f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 41921da177e4SLinus Torvalds } 4193f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 4194f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RESERVE; 4195f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4196f3eb5384SStefan Weinhuber ccw->count = 32; 4197f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 41988e09f215SStefan Weinhuber cqr->startdev = device; 41998e09f215SStefan Weinhuber cqr->memdev = device; 42001da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 42011c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4202336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 42031da177e4SLinus Torvalds cqr->expires = 2 * HZ; 42041aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 42051da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 42061da177e4SLinus Torvalds 42071da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 42085a27e60dSStefan Weinhuber if (!rc) 42095a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 42101da177e4SLinus Torvalds 4211f932bceaSStefan Weinhuber if (useglobal) 4212f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 4213f932bceaSStefan Weinhuber else 42148e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 42151da177e4SLinus Torvalds return rc; 42161da177e4SLinus Torvalds } 42171da177e4SLinus Torvalds 42181da177e4SLinus Torvalds /* 42191da177e4SLinus Torvalds * Steal lock ioctl - unconditional reserve device. 42201da177e4SLinus Torvalds * Buils a channel programm to break a device's reservation. 42211da177e4SLinus Torvalds * (unconditional reserve) 42221da177e4SLinus Torvalds */ 42231da177e4SLinus Torvalds static int 42241107ccfbSChristoph Hellwig dasd_eckd_steal_lock(struct dasd_device *device) 42251da177e4SLinus Torvalds { 42261da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 42271da177e4SLinus Torvalds int rc; 4228f3eb5384SStefan Weinhuber struct ccw1 *ccw; 4229f932bceaSStefan Weinhuber int useglobal; 42301da177e4SLinus Torvalds 42311da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 42321da177e4SLinus Torvalds return -EACCES; 42331da177e4SLinus Torvalds 4234f932bceaSStefan Weinhuber useglobal = 0; 423568b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 42361da177e4SLinus Torvalds if (IS_ERR(cqr)) { 4237f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 4238f932bceaSStefan Weinhuber useglobal = 1; 4239f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 4240f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 4241f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 4242f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 4243f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 4244f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 4245f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 42461da177e4SLinus Torvalds } 4247f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 4248f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SLCK; 4249f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4250f3eb5384SStefan Weinhuber ccw->count = 32; 4251f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 42528e09f215SStefan Weinhuber cqr->startdev = device; 42538e09f215SStefan Weinhuber cqr->memdev = device; 42541da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 42551c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4256336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 42571da177e4SLinus Torvalds cqr->expires = 2 * HZ; 42581aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 42591da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 42601da177e4SLinus Torvalds 42611da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 42625a27e60dSStefan Weinhuber if (!rc) 42635a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 42641da177e4SLinus Torvalds 4265f932bceaSStefan Weinhuber if (useglobal) 4266f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 4267f932bceaSStefan Weinhuber else 42688e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 42691da177e4SLinus Torvalds return rc; 42701da177e4SLinus Torvalds } 42711da177e4SLinus Torvalds 42721da177e4SLinus Torvalds /* 4273196339f1SStefan Weinhuber * SNID - Sense Path Group ID 4274196339f1SStefan Weinhuber * This ioctl may be used in situations where I/O is stalled due to 4275196339f1SStefan Weinhuber * a reserve, so if the normal dasd_smalloc_request fails, we use the 4276196339f1SStefan Weinhuber * preallocated dasd_reserve_req. 4277196339f1SStefan Weinhuber */ 4278196339f1SStefan Weinhuber static int dasd_eckd_snid(struct dasd_device *device, 4279196339f1SStefan Weinhuber void __user *argp) 4280196339f1SStefan Weinhuber { 4281196339f1SStefan Weinhuber struct dasd_ccw_req *cqr; 4282196339f1SStefan Weinhuber int rc; 4283196339f1SStefan Weinhuber struct ccw1 *ccw; 4284196339f1SStefan Weinhuber int useglobal; 4285196339f1SStefan Weinhuber struct dasd_snid_ioctl_data usrparm; 4286196339f1SStefan Weinhuber 4287196339f1SStefan Weinhuber if (!capable(CAP_SYS_ADMIN)) 4288196339f1SStefan Weinhuber return -EACCES; 4289196339f1SStefan Weinhuber 4290196339f1SStefan Weinhuber if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 4291196339f1SStefan Weinhuber return -EFAULT; 4292196339f1SStefan Weinhuber 4293196339f1SStefan Weinhuber useglobal = 0; 4294196339f1SStefan Weinhuber cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 4295196339f1SStefan Weinhuber sizeof(struct dasd_snid_data), device); 4296196339f1SStefan Weinhuber if (IS_ERR(cqr)) { 4297196339f1SStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 4298196339f1SStefan Weinhuber useglobal = 1; 4299196339f1SStefan Weinhuber cqr = &dasd_reserve_req->cqr; 4300196339f1SStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 4301196339f1SStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 4302196339f1SStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 4303196339f1SStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 4304196339f1SStefan Weinhuber cqr->data = &dasd_reserve_req->data; 4305196339f1SStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 4306196339f1SStefan Weinhuber } 4307196339f1SStefan Weinhuber ccw = cqr->cpaddr; 4308196339f1SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SNID; 4309196339f1SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4310196339f1SStefan Weinhuber ccw->count = 12; 4311196339f1SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 4312196339f1SStefan Weinhuber cqr->startdev = device; 4313196339f1SStefan Weinhuber cqr->memdev = device; 4314196339f1SStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 4315196339f1SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 43165a27e60dSStefan Weinhuber set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 4317196339f1SStefan Weinhuber cqr->retries = 5; 4318196339f1SStefan Weinhuber cqr->expires = 10 * HZ; 43191aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 4320196339f1SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 4321196339f1SStefan Weinhuber cqr->lpm = usrparm.path_mask; 4322196339f1SStefan Weinhuber 4323196339f1SStefan Weinhuber rc = dasd_sleep_on_immediatly(cqr); 4324196339f1SStefan Weinhuber /* verify that I/O processing didn't modify the path mask */ 4325196339f1SStefan Weinhuber if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) 4326196339f1SStefan Weinhuber rc = -EIO; 4327196339f1SStefan Weinhuber if (!rc) { 4328196339f1SStefan Weinhuber usrparm.data = *((struct dasd_snid_data *)cqr->data); 4329196339f1SStefan Weinhuber if (copy_to_user(argp, &usrparm, sizeof(usrparm))) 4330196339f1SStefan Weinhuber rc = -EFAULT; 4331196339f1SStefan Weinhuber } 4332196339f1SStefan Weinhuber 4333196339f1SStefan Weinhuber if (useglobal) 4334196339f1SStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 4335196339f1SStefan Weinhuber else 4336196339f1SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 4337196339f1SStefan Weinhuber return rc; 4338196339f1SStefan Weinhuber } 4339196339f1SStefan Weinhuber 4340196339f1SStefan Weinhuber /* 43411da177e4SLinus Torvalds * Read performance statistics 43421da177e4SLinus Torvalds */ 43431da177e4SLinus Torvalds static int 43441107ccfbSChristoph Hellwig dasd_eckd_performance(struct dasd_device *device, void __user *argp) 43451da177e4SLinus Torvalds { 43461da177e4SLinus Torvalds struct dasd_psf_prssd_data *prssdp; 43471da177e4SLinus Torvalds struct dasd_rssd_perf_stats_t *stats; 43481da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 43491da177e4SLinus Torvalds struct ccw1 *ccw; 43501da177e4SLinus Torvalds int rc; 43511da177e4SLinus Torvalds 435268b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 43531da177e4SLinus Torvalds (sizeof(struct dasd_psf_prssd_data) + 43541da177e4SLinus Torvalds sizeof(struct dasd_rssd_perf_stats_t)), 43551da177e4SLinus Torvalds device); 43561da177e4SLinus Torvalds if (IS_ERR(cqr)) { 4357fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 43581da177e4SLinus Torvalds "Could not allocate initialization request"); 43591da177e4SLinus Torvalds return PTR_ERR(cqr); 43601da177e4SLinus Torvalds } 43618e09f215SStefan Weinhuber cqr->startdev = device; 43628e09f215SStefan Weinhuber cqr->memdev = device; 43631da177e4SLinus Torvalds cqr->retries = 0; 4364eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 43651da177e4SLinus Torvalds cqr->expires = 10 * HZ; 43661da177e4SLinus Torvalds 43671da177e4SLinus Torvalds /* Prepare for Read Subsystem Data */ 43681da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 43691da177e4SLinus Torvalds memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 43701da177e4SLinus Torvalds prssdp->order = PSF_ORDER_PRSSD; 43715d67d164SJoe Perches prssdp->suborder = 0x01; /* Performance Statistics */ 43721da177e4SLinus Torvalds prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 43731da177e4SLinus Torvalds 43741da177e4SLinus Torvalds ccw = cqr->cpaddr; 43751da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_PSF; 43761da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_psf_prssd_data); 43771da177e4SLinus Torvalds ccw->flags |= CCW_FLAG_CC; 43781da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) prssdp; 43791da177e4SLinus Torvalds 43801da177e4SLinus Torvalds /* Read Subsystem Data - Performance Statistics */ 43811da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 43821da177e4SLinus Torvalds memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 43831da177e4SLinus Torvalds 43841da177e4SLinus Torvalds ccw++; 43851da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_RSSD; 43861da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 43871da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) stats; 43881da177e4SLinus Torvalds 43891aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 43901da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 43911da177e4SLinus Torvalds rc = dasd_sleep_on(cqr); 43921da177e4SLinus Torvalds if (rc == 0) { 43931da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 43941da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 43951107ccfbSChristoph Hellwig if (copy_to_user(argp, stats, 43961107ccfbSChristoph Hellwig sizeof(struct dasd_rssd_perf_stats_t))) 43971107ccfbSChristoph Hellwig rc = -EFAULT; 43981da177e4SLinus Torvalds } 43998e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 44001da177e4SLinus Torvalds return rc; 44011da177e4SLinus Torvalds } 44021da177e4SLinus Torvalds 44031da177e4SLinus Torvalds /* 44041da177e4SLinus Torvalds * Get attributes (cache operations) 44051da177e4SLinus Torvalds * Returnes the cache attributes used in Define Extend (DE). 44061da177e4SLinus Torvalds */ 44071da177e4SLinus Torvalds static int 44081107ccfbSChristoph Hellwig dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 44091da177e4SLinus Torvalds { 4410543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 44111107ccfbSChristoph Hellwig struct attrib_data_t attrib = private->attrib; 44121da177e4SLinus Torvalds int rc; 44131da177e4SLinus Torvalds 44141da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 44151da177e4SLinus Torvalds return -EACCES; 44161107ccfbSChristoph Hellwig if (!argp) 44171da177e4SLinus Torvalds return -EINVAL; 44181da177e4SLinus Torvalds 44191107ccfbSChristoph Hellwig rc = 0; 44201107ccfbSChristoph Hellwig if (copy_to_user(argp, (long *) &attrib, 44211107ccfbSChristoph Hellwig sizeof(struct attrib_data_t))) 44221107ccfbSChristoph Hellwig rc = -EFAULT; 44231da177e4SLinus Torvalds 44241da177e4SLinus Torvalds return rc; 44251da177e4SLinus Torvalds } 44261da177e4SLinus Torvalds 44271da177e4SLinus Torvalds /* 44281da177e4SLinus Torvalds * Set attributes (cache operations) 44291da177e4SLinus Torvalds * Stores the attributes for cache operation to be used in Define Extend (DE). 44301da177e4SLinus Torvalds */ 44311da177e4SLinus Torvalds static int 44321107ccfbSChristoph Hellwig dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 44331da177e4SLinus Torvalds { 4434543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 44351da177e4SLinus Torvalds struct attrib_data_t attrib; 44361da177e4SLinus Torvalds 44371da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 44381da177e4SLinus Torvalds return -EACCES; 44391107ccfbSChristoph Hellwig if (!argp) 44401da177e4SLinus Torvalds return -EINVAL; 44411da177e4SLinus Torvalds 44421107ccfbSChristoph Hellwig if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 44431da177e4SLinus Torvalds return -EFAULT; 44441da177e4SLinus Torvalds private->attrib = attrib; 44451da177e4SLinus Torvalds 4446fc19f381SStefan Haberland dev_info(&device->cdev->dev, 4447fc19f381SStefan Haberland "The DASD cache mode was set to %x (%i cylinder prestage)\n", 44481da177e4SLinus Torvalds private->attrib.operation, private->attrib.nr_cyl); 44491da177e4SLinus Torvalds return 0; 44501da177e4SLinus Torvalds } 44511da177e4SLinus Torvalds 4452ab1d848fSNigel Hislop /* 4453ab1d848fSNigel Hislop * Issue syscall I/O to EMC Symmetrix array. 4454ab1d848fSNigel Hislop * CCWs are PSF and RSSD 4455ab1d848fSNigel Hislop */ 4456ab1d848fSNigel Hislop static int dasd_symm_io(struct dasd_device *device, void __user *argp) 4457ab1d848fSNigel Hislop { 4458ab1d848fSNigel Hislop struct dasd_symmio_parms usrparm; 4459ab1d848fSNigel Hislop char *psf_data, *rssd_result; 4460ab1d848fSNigel Hislop struct dasd_ccw_req *cqr; 4461ab1d848fSNigel Hislop struct ccw1 *ccw; 446252898025SNigel Hislop char psf0, psf1; 4463ab1d848fSNigel Hislop int rc; 4464ab1d848fSNigel Hislop 446552898025SNigel Hislop if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) 446652898025SNigel Hislop return -EACCES; 446752898025SNigel Hislop psf0 = psf1 = 0; 446852898025SNigel Hislop 4469ab1d848fSNigel Hislop /* Copy parms from caller */ 4470ab1d848fSNigel Hislop rc = -EFAULT; 4471ab1d848fSNigel Hislop if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 4472ab1d848fSNigel Hislop goto out; 447392d62891SHeiko Carstens if (is_compat_task()) { 4474ab1d848fSNigel Hislop /* Make sure pointers are sane even on 31 bit. */ 4475ab1d848fSNigel Hislop rc = -EINVAL; 4476f8b06859SHeiko Carstens if ((usrparm.psf_data >> 32) != 0) 4477ab1d848fSNigel Hislop goto out; 4478f8b06859SHeiko Carstens if ((usrparm.rssd_result >> 32) != 0) 4479f8b06859SHeiko Carstens goto out; 4480f8b06859SHeiko Carstens usrparm.psf_data &= 0x7fffffffULL; 4481f8b06859SHeiko Carstens usrparm.rssd_result &= 0x7fffffffULL; 4482ab1d848fSNigel Hislop } 4483ab1d848fSNigel Hislop /* alloc I/O data area */ 4484ab1d848fSNigel Hislop psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 4485ab1d848fSNigel Hislop rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 4486ab1d848fSNigel Hislop if (!psf_data || !rssd_result) { 4487ab1d848fSNigel Hislop rc = -ENOMEM; 4488ab1d848fSNigel Hislop goto out_free; 4489ab1d848fSNigel Hislop } 4490ab1d848fSNigel Hislop 4491ab1d848fSNigel Hislop /* get syscall header from user space */ 4492ab1d848fSNigel Hislop rc = -EFAULT; 4493ab1d848fSNigel Hislop if (copy_from_user(psf_data, 4494ab1d848fSNigel Hislop (void __user *)(unsigned long) usrparm.psf_data, 4495ab1d848fSNigel Hislop usrparm.psf_data_len)) 4496ab1d848fSNigel Hislop goto out_free; 449752898025SNigel Hislop psf0 = psf_data[0]; 449852898025SNigel Hislop psf1 = psf_data[1]; 4499ab1d848fSNigel Hislop 4500ab1d848fSNigel Hislop /* setup CCWs for PSF + RSSD */ 450168b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device); 4502ab1d848fSNigel Hislop if (IS_ERR(cqr)) { 4503fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 4504ab1d848fSNigel Hislop "Could not allocate initialization request"); 4505ab1d848fSNigel Hislop rc = PTR_ERR(cqr); 4506ab1d848fSNigel Hislop goto out_free; 4507ab1d848fSNigel Hislop } 4508ab1d848fSNigel Hislop 4509ab1d848fSNigel Hislop cqr->startdev = device; 4510ab1d848fSNigel Hislop cqr->memdev = device; 4511ab1d848fSNigel Hislop cqr->retries = 3; 4512ab1d848fSNigel Hislop cqr->expires = 10 * HZ; 45131aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 4514ab1d848fSNigel Hislop cqr->status = DASD_CQR_FILLED; 4515ab1d848fSNigel Hislop 4516ab1d848fSNigel Hislop /* Build the ccws */ 4517ab1d848fSNigel Hislop ccw = cqr->cpaddr; 4518ab1d848fSNigel Hislop 4519ab1d848fSNigel Hislop /* PSF ccw */ 4520ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_PSF; 4521ab1d848fSNigel Hislop ccw->count = usrparm.psf_data_len; 4522ab1d848fSNigel Hislop ccw->flags |= CCW_FLAG_CC; 4523ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) psf_data; 4524ab1d848fSNigel Hislop 4525ab1d848fSNigel Hislop ccw++; 4526ab1d848fSNigel Hislop 4527ab1d848fSNigel Hislop /* RSSD ccw */ 4528ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_RSSD; 4529ab1d848fSNigel Hislop ccw->count = usrparm.rssd_result_len; 4530ab1d848fSNigel Hislop ccw->flags = CCW_FLAG_SLI ; 4531ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) rssd_result; 4532ab1d848fSNigel Hislop 4533ab1d848fSNigel Hislop rc = dasd_sleep_on(cqr); 4534ab1d848fSNigel Hislop if (rc) 4535ab1d848fSNigel Hislop goto out_sfree; 4536ab1d848fSNigel Hislop 4537ab1d848fSNigel Hislop rc = -EFAULT; 4538ab1d848fSNigel Hislop if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 4539ab1d848fSNigel Hislop rssd_result, usrparm.rssd_result_len)) 4540ab1d848fSNigel Hislop goto out_sfree; 4541ab1d848fSNigel Hislop rc = 0; 4542ab1d848fSNigel Hislop 4543ab1d848fSNigel Hislop out_sfree: 4544ab1d848fSNigel Hislop dasd_sfree_request(cqr, cqr->memdev); 4545ab1d848fSNigel Hislop out_free: 4546ab1d848fSNigel Hislop kfree(rssd_result); 4547ab1d848fSNigel Hislop kfree(psf_data); 4548ab1d848fSNigel Hislop out: 454952898025SNigel Hislop DBF_DEV_EVENT(DBF_WARNING, device, 455052898025SNigel Hislop "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", 455152898025SNigel Hislop (int) psf0, (int) psf1, rc); 4552ab1d848fSNigel Hislop return rc; 4553ab1d848fSNigel Hislop } 4554ab1d848fSNigel Hislop 45551107ccfbSChristoph Hellwig static int 45568e09f215SStefan Weinhuber dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 45571107ccfbSChristoph Hellwig { 45588e09f215SStefan Weinhuber struct dasd_device *device = block->base; 45598e09f215SStefan Weinhuber 45601107ccfbSChristoph Hellwig switch (cmd) { 45611107ccfbSChristoph Hellwig case BIODASDGATTR: 45621107ccfbSChristoph Hellwig return dasd_eckd_get_attrib(device, argp); 45631107ccfbSChristoph Hellwig case BIODASDSATTR: 45641107ccfbSChristoph Hellwig return dasd_eckd_set_attrib(device, argp); 45651107ccfbSChristoph Hellwig case BIODASDPSRD: 45661107ccfbSChristoph Hellwig return dasd_eckd_performance(device, argp); 45671107ccfbSChristoph Hellwig case BIODASDRLSE: 45681107ccfbSChristoph Hellwig return dasd_eckd_release(device); 45691107ccfbSChristoph Hellwig case BIODASDRSRV: 45701107ccfbSChristoph Hellwig return dasd_eckd_reserve(device); 45711107ccfbSChristoph Hellwig case BIODASDSLCK: 45721107ccfbSChristoph Hellwig return dasd_eckd_steal_lock(device); 4573196339f1SStefan Weinhuber case BIODASDSNID: 4574196339f1SStefan Weinhuber return dasd_eckd_snid(device, argp); 4575ab1d848fSNigel Hislop case BIODASDSYMMIO: 4576ab1d848fSNigel Hislop return dasd_symm_io(device, argp); 45771107ccfbSChristoph Hellwig default: 45786b79d14eSHeiko Carstens return -ENOTTY; 45791107ccfbSChristoph Hellwig } 45801107ccfbSChristoph Hellwig } 45811107ccfbSChristoph Hellwig 45821da177e4SLinus Torvalds /* 4583445b5b49SHorst Hummel * Dump the range of CCWs into 'page' buffer 4584445b5b49SHorst Hummel * and return number of printed chars. 4585445b5b49SHorst Hummel */ 45864d284cacSHeiko Carstens static int 4587445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 4588445b5b49SHorst Hummel { 4589445b5b49SHorst Hummel int len, count; 4590445b5b49SHorst Hummel char *datap; 4591445b5b49SHorst Hummel 4592445b5b49SHorst Hummel len = 0; 4593445b5b49SHorst Hummel while (from <= to) { 4594773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4595445b5b49SHorst Hummel " CCW %p: %08X %08X DAT:", 4596445b5b49SHorst Hummel from, ((int *) from)[0], ((int *) from)[1]); 4597445b5b49SHorst Hummel 4598445b5b49SHorst Hummel /* get pointer to data (consider IDALs) */ 4599445b5b49SHorst Hummel if (from->flags & CCW_FLAG_IDA) 4600445b5b49SHorst Hummel datap = (char *) *((addr_t *) (addr_t) from->cda); 4601445b5b49SHorst Hummel else 4602445b5b49SHorst Hummel datap = (char *) ((addr_t) from->cda); 4603445b5b49SHorst Hummel 4604445b5b49SHorst Hummel /* dump data (max 32 bytes) */ 4605445b5b49SHorst Hummel for (count = 0; count < from->count && count < 32; count++) { 4606445b5b49SHorst Hummel if (count % 8 == 0) len += sprintf(page + len, " "); 4607445b5b49SHorst Hummel if (count % 4 == 0) len += sprintf(page + len, " "); 4608445b5b49SHorst Hummel len += sprintf(page + len, "%02x", datap[count]); 4609445b5b49SHorst Hummel } 4610445b5b49SHorst Hummel len += sprintf(page + len, "\n"); 4611445b5b49SHorst Hummel from++; 4612445b5b49SHorst Hummel } 4613445b5b49SHorst Hummel return len; 4614445b5b49SHorst Hummel } 4615445b5b49SHorst Hummel 4616fc19f381SStefan Haberland static void 4617aeec92caSStefan Haberland dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 4618aeec92caSStefan Haberland char *reason) 4619fc19f381SStefan Haberland { 4620fc19f381SStefan Haberland u64 *sense; 4621a5a0061fSStefan Weinhuber u64 *stat; 4622fc19f381SStefan Haberland 4623aeec92caSStefan Haberland sense = (u64 *) dasd_get_sense(irb); 4624a5a0061fSStefan Weinhuber stat = (u64 *) &irb->scsw; 4625fc19f381SStefan Haberland if (sense) { 4626a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " 4627a5a0061fSStefan Weinhuber "%016llx %016llx %016llx %016llx", 4628a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 4629ed3640b2SStefan Haberland sense[0], sense[1], sense[2], sense[3]); 4630fc19f381SStefan Haberland } else { 4631a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", 4632a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 4633a5a0061fSStefan Weinhuber "NO VALID SENSE"); 4634fc19f381SStefan Haberland } 4635fc19f381SStefan Haberland } 4636fc19f381SStefan Haberland 4637445b5b49SHorst Hummel /* 46381da177e4SLinus Torvalds * Print sense data and related channel program. 46391da177e4SLinus Torvalds * Parts are printed because printk buffer is only 1024 bytes. 46401da177e4SLinus Torvalds */ 4641f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 46428e09f215SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 46431da177e4SLinus Torvalds { 46441da177e4SLinus Torvalds char *page; 4645445b5b49SHorst Hummel struct ccw1 *first, *last, *fail, *from, *to; 4646445b5b49SHorst Hummel int len, sl, sct; 46471da177e4SLinus Torvalds 46481da177e4SLinus Torvalds page = (char *) get_zeroed_page(GFP_ATOMIC); 46491da177e4SLinus Torvalds if (page == NULL) { 4650fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 4651fc19f381SStefan Haberland "No memory to dump sense data\n"); 46521da177e4SLinus Torvalds return; 46531da177e4SLinus Torvalds } 4654445b5b49SHorst Hummel /* dump the sense data */ 4655773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 46561da177e4SLinus Torvalds " I/O status report for device %s:\n", 46572a0217d5SKay Sievers dev_name(&device->cdev->dev)); 4658773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4659a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 4660a5a0061fSStefan Weinhuber "CS:%02X RC:%d\n", 4661a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 4662a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 4663a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 4664a5a0061fSStefan Weinhuber req ? req->intrc : 0); 4665773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 46661da177e4SLinus Torvalds " device %s: Failing CCW: %p\n", 46672a0217d5SKay Sievers dev_name(&device->cdev->dev), 466823d805b6SPeter Oberparleiter (void *) (addr_t) irb->scsw.cmd.cpa); 46691da177e4SLinus Torvalds if (irb->esw.esw0.erw.cons) { 46701da177e4SLinus Torvalds for (sl = 0; sl < 4; sl++) { 4671773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 46721da177e4SLinus Torvalds " Sense(hex) %2d-%2d:", 46731da177e4SLinus Torvalds (8 * sl), ((8 * sl) + 7)); 46741da177e4SLinus Torvalds 46751da177e4SLinus Torvalds for (sct = 0; sct < 8; sct++) { 46761da177e4SLinus Torvalds len += sprintf(page + len, " %02x", 46771da177e4SLinus Torvalds irb->ecw[8 * sl + sct]); 46781da177e4SLinus Torvalds } 46791da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 46801da177e4SLinus Torvalds } 46811da177e4SLinus Torvalds 46821da177e4SLinus Torvalds if (irb->ecw[27] & DASD_SENSE_BIT_0) { 46831da177e4SLinus Torvalds /* 24 Byte Sense Data */ 4684773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 46851da177e4SLinus Torvalds " 24 Byte: %x MSG %x, " 46861da177e4SLinus Torvalds "%s MSGb to SYSOP\n", 46871da177e4SLinus Torvalds irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 46881da177e4SLinus Torvalds irb->ecw[1] & 0x10 ? "" : "no"); 46891da177e4SLinus Torvalds } else { 46901da177e4SLinus Torvalds /* 32 Byte Sense Data */ 4691773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 46921da177e4SLinus Torvalds " 32 Byte: Format: %x " 46931da177e4SLinus Torvalds "Exception class %x\n", 46941da177e4SLinus Torvalds irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 46951da177e4SLinus Torvalds } 46961da177e4SLinus Torvalds } else { 4697773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 46981da177e4SLinus Torvalds " SORRY - NO VALID SENSE AVAILABLE\n"); 46991da177e4SLinus Torvalds } 4700773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 47011da177e4SLinus Torvalds 47028e09f215SStefan Weinhuber if (req) { 47038e09f215SStefan Weinhuber /* req == NULL for unsolicited interrupts */ 4704445b5b49SHorst Hummel /* dump the Channel Program (max 140 Bytes per line) */ 4705445b5b49SHorst Hummel /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 4706445b5b49SHorst Hummel first = req->cpaddr; 4707445b5b49SHorst Hummel for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 4708445b5b49SHorst Hummel to = min(first + 6, last); 4709773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 47101da177e4SLinus Torvalds " Related CP in req: %p\n", req); 4711445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(first, to, page + len); 4712773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 47131da177e4SLinus Torvalds 4714445b5b49SHorst Hummel /* print failing CCW area (maximum 4) */ 4715445b5b49SHorst Hummel /* scsw->cda is either valid or zero */ 47161da177e4SLinus Torvalds len = 0; 4717445b5b49SHorst Hummel from = ++to; 471823d805b6SPeter Oberparleiter fail = (struct ccw1 *)(addr_t) 471923d805b6SPeter Oberparleiter irb->scsw.cmd.cpa; /* failing CCW */ 4720445b5b49SHorst Hummel if (from < fail - 2) { 4721445b5b49SHorst Hummel from = fail - 2; /* there is a gap - print header */ 4722773bab4aSSebastian Ott len += sprintf(page, PRINTK_HEADER "......\n"); 47231da177e4SLinus Torvalds } 4724445b5b49SHorst Hummel to = min(fail + 1, last); 4725445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, to, page + len); 47261da177e4SLinus Torvalds 4727445b5b49SHorst Hummel /* print last CCWs (maximum 2) */ 4728445b5b49SHorst Hummel from = max(from, ++to); 4729445b5b49SHorst Hummel if (from < last - 1) { 4730445b5b49SHorst Hummel from = last - 1; /* there is a gap - print header */ 4731773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER "......\n"); 47321da177e4SLinus Torvalds } 4733445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, last, page + len); 47341da177e4SLinus Torvalds if (len > 0) 4735773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 47368e09f215SStefan Weinhuber } 47371da177e4SLinus Torvalds free_page((unsigned long) page); 47381da177e4SLinus Torvalds } 47391da177e4SLinus Torvalds 4740f3eb5384SStefan Weinhuber 4741f3eb5384SStefan Weinhuber /* 4742f3eb5384SStefan Weinhuber * Print sense data from a tcw. 4743f3eb5384SStefan Weinhuber */ 4744f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 4745f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 4746f3eb5384SStefan Weinhuber { 4747f3eb5384SStefan Weinhuber char *page; 4748f3eb5384SStefan Weinhuber int len, sl, sct, residual; 4749f3eb5384SStefan Weinhuber struct tsb *tsb; 4750ef19298bSStefan Weinhuber u8 *sense, *rcq; 4751f3eb5384SStefan Weinhuber 4752f3eb5384SStefan Weinhuber page = (char *) get_zeroed_page(GFP_ATOMIC); 4753f3eb5384SStefan Weinhuber if (page == NULL) { 4754fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, " %s", 4755f3eb5384SStefan Weinhuber "No memory to dump sense data"); 4756f3eb5384SStefan Weinhuber return; 4757f3eb5384SStefan Weinhuber } 4758f3eb5384SStefan Weinhuber /* dump the sense data */ 4759773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 4760f3eb5384SStefan Weinhuber " I/O status report for device %s:\n", 4761f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev)); 4762773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4763a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 4764a5a0061fSStefan Weinhuber "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", 4765a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 4766a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 4767a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 4768a5a0061fSStefan Weinhuber irb->scsw.tm.fcxs, irb->scsw.tm.schxs, 4769a5a0061fSStefan Weinhuber req ? req->intrc : 0); 4770773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4771f3eb5384SStefan Weinhuber " device %s: Failing TCW: %p\n", 4772f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev), 4773f3eb5384SStefan Weinhuber (void *) (addr_t) irb->scsw.tm.tcw); 4774f3eb5384SStefan Weinhuber 4775f3eb5384SStefan Weinhuber tsb = NULL; 4776f3eb5384SStefan Weinhuber sense = NULL; 4777a5a0061fSStefan Weinhuber if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) 4778f3eb5384SStefan Weinhuber tsb = tcw_get_tsb( 4779f3eb5384SStefan Weinhuber (struct tcw *)(unsigned long)irb->scsw.tm.tcw); 4780f3eb5384SStefan Weinhuber 4781b8fde722SStefan Haberland if (tsb) { 4782773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4783f3eb5384SStefan Weinhuber " tsb->length %d\n", tsb->length); 4784773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4785f3eb5384SStefan Weinhuber " tsb->flags %x\n", tsb->flags); 4786773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4787f3eb5384SStefan Weinhuber " tsb->dcw_offset %d\n", tsb->dcw_offset); 4788773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4789f3eb5384SStefan Weinhuber " tsb->count %d\n", tsb->count); 4790f3eb5384SStefan Weinhuber residual = tsb->count - 28; 4791773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4792f3eb5384SStefan Weinhuber " residual %d\n", residual); 4793f3eb5384SStefan Weinhuber 4794f3eb5384SStefan Weinhuber switch (tsb->flags & 0x07) { 4795f3eb5384SStefan Weinhuber case 1: /* tsa_iostat */ 4796773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4797f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_time %d\n", 4798f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_time); 4799773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4800f3eb5384SStefan Weinhuber " tsb->tsa.iostat.def_time %d\n", 4801f3eb5384SStefan Weinhuber tsb->tsa.iostat.def_time); 4802773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4803f3eb5384SStefan Weinhuber " tsb->tsa.iostat.queue_time %d\n", 4804f3eb5384SStefan Weinhuber tsb->tsa.iostat.queue_time); 4805773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4806f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_busy_time %d\n", 4807f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_busy_time); 4808773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4809f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_act_time %d\n", 4810f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_act_time); 4811f3eb5384SStefan Weinhuber sense = tsb->tsa.iostat.sense; 4812f3eb5384SStefan Weinhuber break; 4813f3eb5384SStefan Weinhuber case 2: /* ts_ddpc */ 4814773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4815f3eb5384SStefan Weinhuber " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); 4816ef19298bSStefan Weinhuber for (sl = 0; sl < 2; sl++) { 4817773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4818ef19298bSStefan Weinhuber " tsb->tsa.ddpc.rcq %2d-%2d: ", 4819ef19298bSStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 4820ef19298bSStefan Weinhuber rcq = tsb->tsa.ddpc.rcq; 4821f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 4822f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 4823ef19298bSStefan Weinhuber rcq[8 * sl + sct]); 4824f3eb5384SStefan Weinhuber } 4825f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 4826f3eb5384SStefan Weinhuber } 4827f3eb5384SStefan Weinhuber sense = tsb->tsa.ddpc.sense; 4828f3eb5384SStefan Weinhuber break; 4829f3eb5384SStefan Weinhuber case 3: /* tsa_intrg */ 4830773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4831f3eb5384SStefan Weinhuber " tsb->tsa.intrg.: not supportet yet\n"); 4832f3eb5384SStefan Weinhuber break; 4833f3eb5384SStefan Weinhuber } 4834f3eb5384SStefan Weinhuber 4835f3eb5384SStefan Weinhuber if (sense) { 4836f3eb5384SStefan Weinhuber for (sl = 0; sl < 4; sl++) { 4837773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4838f3eb5384SStefan Weinhuber " Sense(hex) %2d-%2d:", 4839f3eb5384SStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 4840f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 4841f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 4842f3eb5384SStefan Weinhuber sense[8 * sl + sct]); 4843f3eb5384SStefan Weinhuber } 4844f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 4845f3eb5384SStefan Weinhuber } 4846f3eb5384SStefan Weinhuber 4847f3eb5384SStefan Weinhuber if (sense[27] & DASD_SENSE_BIT_0) { 4848f3eb5384SStefan Weinhuber /* 24 Byte Sense Data */ 4849773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4850f3eb5384SStefan Weinhuber " 24 Byte: %x MSG %x, " 4851f3eb5384SStefan Weinhuber "%s MSGb to SYSOP\n", 4852f3eb5384SStefan Weinhuber sense[7] >> 4, sense[7] & 0x0f, 4853f3eb5384SStefan Weinhuber sense[1] & 0x10 ? "" : "no"); 4854f3eb5384SStefan Weinhuber } else { 4855f3eb5384SStefan Weinhuber /* 32 Byte Sense Data */ 4856773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4857f3eb5384SStefan Weinhuber " 32 Byte: Format: %x " 4858f3eb5384SStefan Weinhuber "Exception class %x\n", 4859f3eb5384SStefan Weinhuber sense[6] & 0x0f, sense[22] >> 4); 4860f3eb5384SStefan Weinhuber } 4861f3eb5384SStefan Weinhuber } else { 4862773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4863f3eb5384SStefan Weinhuber " SORRY - NO VALID SENSE AVAILABLE\n"); 4864f3eb5384SStefan Weinhuber } 4865f3eb5384SStefan Weinhuber } else { 4866773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4867f3eb5384SStefan Weinhuber " SORRY - NO TSB DATA AVAILABLE\n"); 4868f3eb5384SStefan Weinhuber } 4869773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 4870f3eb5384SStefan Weinhuber free_page((unsigned long) page); 4871f3eb5384SStefan Weinhuber } 4872f3eb5384SStefan Weinhuber 4873f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense(struct dasd_device *device, 4874f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 4875f3eb5384SStefan Weinhuber { 48768fd57520SJan Höppner u8 *sense = dasd_get_sense(irb); 48778fd57520SJan Höppner 48788fd57520SJan Höppner if (scsw_is_tm(&irb->scsw)) { 48798fd57520SJan Höppner /* 48808fd57520SJan Höppner * In some cases the 'File Protected' or 'Incorrect Length' 48818fd57520SJan Höppner * error might be expected and log messages shouldn't be written 48828fd57520SJan Höppner * then. Check if the according suppress bit is set. 48838fd57520SJan Höppner */ 48848fd57520SJan Höppner if (sense && (sense[1] & SNS1_FILE_PROTECTED) && 48858fd57520SJan Höppner test_bit(DASD_CQR_SUPPRESS_FP, &req->flags)) 48868fd57520SJan Höppner return; 48878fd57520SJan Höppner if (scsw_cstat(&irb->scsw) == 0x40 && 48888fd57520SJan Höppner test_bit(DASD_CQR_SUPPRESS_IL, &req->flags)) 48898fd57520SJan Höppner return; 48908fd57520SJan Höppner 4891f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_tcw(device, req, irb); 48928fd57520SJan Höppner } else { 48938fd57520SJan Höppner /* 48948fd57520SJan Höppner * In some cases the 'No Record Found' error might be expected 48958fd57520SJan Höppner * and log messages shouldn't be written then. Check if the 48968fd57520SJan Höppner * according suppress bit is set. 48978fd57520SJan Höppner */ 48988fd57520SJan Höppner if (sense && sense[1] & SNS1_NO_REC_FOUND && 48998fd57520SJan Höppner test_bit(DASD_CQR_SUPPRESS_NRF, &req->flags)) 49008fd57520SJan Höppner return; 49018fd57520SJan Höppner 4902f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_ccw(device, req, irb); 4903f3eb5384SStefan Weinhuber } 49048fd57520SJan Höppner } 4905f3eb5384SStefan Weinhuber 4906501183f2SStefan Haberland static int dasd_eckd_pm_freeze(struct dasd_device *device) 4907d41dd122SStefan Haberland { 4908d41dd122SStefan Haberland /* 4909d41dd122SStefan Haberland * the device should be disconnected from our LCU structure 4910d41dd122SStefan Haberland * on restore we will reconnect it and reread LCU specific 4911d41dd122SStefan Haberland * information like PAV support that might have changed 4912d41dd122SStefan Haberland */ 4913d41dd122SStefan Haberland dasd_alias_remove_device(device); 4914d41dd122SStefan Haberland dasd_alias_disconnect_device_from_lcu(device); 4915d41dd122SStefan Haberland 4916d41dd122SStefan Haberland return 0; 4917d41dd122SStefan Haberland } 4918d41dd122SStefan Haberland 4919501183f2SStefan Haberland static int dasd_eckd_restore_device(struct dasd_device *device) 4920d41dd122SStefan Haberland { 4921543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 49226fca97a9SStefan Haberland struct dasd_eckd_characteristics temp_rdc_data; 4923f9f8d02fSStefan Haberland int rc; 4924d41dd122SStefan Haberland struct dasd_uid temp_uid; 4925a7602f6cSStefan Haberland unsigned long flags; 4926ea4da6eaSStefan Haberland unsigned long cqr_flags = 0; 4927d41dd122SStefan Haberland 4928d41dd122SStefan Haberland /* Read Configuration Data */ 4929251afd69SStefan Haberland rc = dasd_eckd_read_conf(device); 4930251afd69SStefan Haberland if (rc) { 4931251afd69SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 4932251afd69SStefan Haberland "Read configuration data failed, rc=%d", rc); 4933251afd69SStefan Haberland goto out_err; 4934251afd69SStefan Haberland } 4935d41dd122SStefan Haberland 49362dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 49372dedf0d9SStefan Haberland /* Generate device unique id */ 49382dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 49392dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4940d41dd122SStefan Haberland if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) 4941a7602f6cSStefan Haberland dev_err(&device->cdev->dev, "The UID of the DASD has " 4942a7602f6cSStefan Haberland "changed\n"); 49432dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4944d41dd122SStefan Haberland if (rc) 4945d41dd122SStefan Haberland goto out_err; 4946d41dd122SStefan Haberland 4947d41dd122SStefan Haberland /* register lcu with alias handling, enable PAV if this is a new lcu */ 4948f9f8d02fSStefan Haberland rc = dasd_alias_make_device_known_to_lcu(device); 4949f9f8d02fSStefan Haberland if (rc) 4950251afd69SStefan Haberland goto out_err; 4951ea4da6eaSStefan Haberland 4952ea4da6eaSStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr_flags); 4953ea4da6eaSStefan Haberland dasd_eckd_validate_server(device, cqr_flags); 4954f4ac1d02SStefan Weinhuber 4955f4ac1d02SStefan Weinhuber /* RE-Read Configuration Data */ 4956251afd69SStefan Haberland rc = dasd_eckd_read_conf(device); 4957251afd69SStefan Haberland if (rc) { 4958251afd69SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 4959251afd69SStefan Haberland "Read configuration data failed, rc=%d", rc); 4960251afd69SStefan Haberland goto out_err2; 4961251afd69SStefan Haberland } 4962d41dd122SStefan Haberland 4963d41dd122SStefan Haberland /* Read Feature Codes */ 496468d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 4965d41dd122SStefan Haberland 4966d41dd122SStefan Haberland /* Read Device Characteristics */ 496768b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 49686fca97a9SStefan Haberland &temp_rdc_data, 64); 4969d41dd122SStefan Haberland if (rc) { 4970b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 4971b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 4972251afd69SStefan Haberland goto out_err2; 4973d41dd122SStefan Haberland } 4974a7602f6cSStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 49756fca97a9SStefan Haberland memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data)); 4976a7602f6cSStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4977d41dd122SStefan Haberland 4978d41dd122SStefan Haberland /* add device to alias management */ 4979d41dd122SStefan Haberland dasd_alias_add_device(device); 4980d41dd122SStefan Haberland 4981d41dd122SStefan Haberland return 0; 4982d41dd122SStefan Haberland 4983251afd69SStefan Haberland out_err2: 4984251afd69SStefan Haberland dasd_alias_disconnect_device_from_lcu(device); 4985d41dd122SStefan Haberland out_err: 4986e6125fbaSStefan Haberland return -1; 4987d41dd122SStefan Haberland } 4988d41dd122SStefan Haberland 4989501183f2SStefan Haberland static int dasd_eckd_reload_device(struct dasd_device *device) 4990501183f2SStefan Haberland { 4991543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 4992501183f2SStefan Haberland int rc, old_base; 49932dedf0d9SStefan Haberland char print_uid[60]; 49942dedf0d9SStefan Haberland struct dasd_uid uid; 49952dedf0d9SStefan Haberland unsigned long flags; 4996501183f2SStefan Haberland 499759a9ed5fSStefan Haberland /* 499859a9ed5fSStefan Haberland * remove device from alias handling to prevent new requests 499959a9ed5fSStefan Haberland * from being scheduled on the wrong alias device 500059a9ed5fSStefan Haberland */ 500159a9ed5fSStefan Haberland dasd_alias_remove_device(device); 500259a9ed5fSStefan Haberland 50032dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 5004501183f2SStefan Haberland old_base = private->uid.base_unit_addr; 50052dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 50062dedf0d9SStefan Haberland 5007501183f2SStefan Haberland /* Read Configuration Data */ 5008501183f2SStefan Haberland rc = dasd_eckd_read_conf(device); 5009501183f2SStefan Haberland if (rc) 5010501183f2SStefan Haberland goto out_err; 5011501183f2SStefan Haberland 50122dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 5013501183f2SStefan Haberland if (rc) 5014501183f2SStefan Haberland goto out_err; 5015501183f2SStefan Haberland /* 5016501183f2SStefan Haberland * update unit address configuration and 5017501183f2SStefan Haberland * add device to alias management 5018501183f2SStefan Haberland */ 5019501183f2SStefan Haberland dasd_alias_update_add_device(device); 5020501183f2SStefan Haberland 50212dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &uid); 50222dedf0d9SStefan Haberland 50232dedf0d9SStefan Haberland if (old_base != uid.base_unit_addr) { 50242dedf0d9SStefan Haberland if (strlen(uid.vduit) > 0) 50252dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 50262dedf0d9SStefan Haberland "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial, 50272dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr, uid.vduit); 5028501183f2SStefan Haberland else 50292dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 50302dedf0d9SStefan Haberland "%s.%s.%04x.%02x", uid.vendor, uid.serial, 50312dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr); 5032501183f2SStefan Haberland 5033501183f2SStefan Haberland dev_info(&device->cdev->dev, 5034501183f2SStefan Haberland "An Alias device was reassigned to a new base device " 50352dedf0d9SStefan Haberland "with UID: %s\n", print_uid); 5036501183f2SStefan Haberland } 5037501183f2SStefan Haberland return 0; 5038501183f2SStefan Haberland 5039501183f2SStefan Haberland out_err: 5040501183f2SStefan Haberland return -1; 5041501183f2SStefan Haberland } 5042501183f2SStefan Haberland 50435db8440cSStefan Haberland static int dasd_eckd_read_message_buffer(struct dasd_device *device, 50445db8440cSStefan Haberland struct dasd_rssd_messages *messages, 50455db8440cSStefan Haberland __u8 lpum) 50465db8440cSStefan Haberland { 50475db8440cSStefan Haberland struct dasd_rssd_messages *message_buf; 50485db8440cSStefan Haberland struct dasd_psf_prssd_data *prssdp; 50495db8440cSStefan Haberland struct dasd_ccw_req *cqr; 50505db8440cSStefan Haberland struct ccw1 *ccw; 50515db8440cSStefan Haberland int rc; 50525db8440cSStefan Haberland 50535db8440cSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 50545db8440cSStefan Haberland (sizeof(struct dasd_psf_prssd_data) + 50555db8440cSStefan Haberland sizeof(struct dasd_rssd_messages)), 50565db8440cSStefan Haberland device); 50575db8440cSStefan Haberland if (IS_ERR(cqr)) { 50585db8440cSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 50595db8440cSStefan Haberland "Could not allocate read message buffer request"); 50605db8440cSStefan Haberland return PTR_ERR(cqr); 50615db8440cSStefan Haberland } 50625db8440cSStefan Haberland 5063af775210SStefan Haberland cqr->lpm = lpum; 5064af775210SStefan Haberland retry: 50655db8440cSStefan Haberland cqr->startdev = device; 50665db8440cSStefan Haberland cqr->memdev = device; 50675db8440cSStefan Haberland cqr->block = NULL; 50685db8440cSStefan Haberland cqr->expires = 10 * HZ; 50695db8440cSStefan Haberland set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 5070b179b037SStefan Haberland /* dasd_sleep_on_immediatly does not do complex error 5071b179b037SStefan Haberland * recovery so clear erp flag and set retry counter to 5072b179b037SStefan Haberland * do basic erp */ 5073b179b037SStefan Haberland clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 5074b179b037SStefan Haberland cqr->retries = 256; 50755db8440cSStefan Haberland 50765db8440cSStefan Haberland /* Prepare for Read Subsystem Data */ 50775db8440cSStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 50785db8440cSStefan Haberland memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 50795db8440cSStefan Haberland prssdp->order = PSF_ORDER_PRSSD; 50805db8440cSStefan Haberland prssdp->suborder = 0x03; /* Message Buffer */ 50815db8440cSStefan Haberland /* all other bytes of prssdp must be zero */ 50825db8440cSStefan Haberland 50835db8440cSStefan Haberland ccw = cqr->cpaddr; 50845db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 50855db8440cSStefan Haberland ccw->count = sizeof(struct dasd_psf_prssd_data); 50865db8440cSStefan Haberland ccw->flags |= CCW_FLAG_CC; 50875db8440cSStefan Haberland ccw->flags |= CCW_FLAG_SLI; 50885db8440cSStefan Haberland ccw->cda = (__u32)(addr_t) prssdp; 50895db8440cSStefan Haberland 50905db8440cSStefan Haberland /* Read Subsystem Data - message buffer */ 50915db8440cSStefan Haberland message_buf = (struct dasd_rssd_messages *) (prssdp + 1); 50925db8440cSStefan Haberland memset(message_buf, 0, sizeof(struct dasd_rssd_messages)); 50935db8440cSStefan Haberland 50945db8440cSStefan Haberland ccw++; 50955db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_RSSD; 50965db8440cSStefan Haberland ccw->count = sizeof(struct dasd_rssd_messages); 50975db8440cSStefan Haberland ccw->flags |= CCW_FLAG_SLI; 50985db8440cSStefan Haberland ccw->cda = (__u32)(addr_t) message_buf; 50995db8440cSStefan Haberland 51005db8440cSStefan Haberland cqr->buildclk = get_tod_clock(); 51015db8440cSStefan Haberland cqr->status = DASD_CQR_FILLED; 51025db8440cSStefan Haberland rc = dasd_sleep_on_immediatly(cqr); 51035db8440cSStefan Haberland if (rc == 0) { 51045db8440cSStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 51055db8440cSStefan Haberland message_buf = (struct dasd_rssd_messages *) 51065db8440cSStefan Haberland (prssdp + 1); 51075db8440cSStefan Haberland memcpy(messages, message_buf, 51085db8440cSStefan Haberland sizeof(struct dasd_rssd_messages)); 5109af775210SStefan Haberland } else if (cqr->lpm) { 5110af775210SStefan Haberland /* 5111af775210SStefan Haberland * on z/VM we might not be able to do I/O on the requested path 5112af775210SStefan Haberland * but instead we get the required information on any path 5113af775210SStefan Haberland * so retry with open path mask 5114af775210SStefan Haberland */ 5115af775210SStefan Haberland cqr->lpm = 0; 5116af775210SStefan Haberland goto retry; 51175db8440cSStefan Haberland } else 51185db8440cSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 51195db8440cSStefan Haberland "Reading messages failed with rc=%d\n" 51205db8440cSStefan Haberland , rc); 51215db8440cSStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 51225db8440cSStefan Haberland return rc; 51235db8440cSStefan Haberland } 51245db8440cSStefan Haberland 51255a3b7b11SStefan Haberland static int dasd_eckd_query_host_access(struct dasd_device *device, 51265a3b7b11SStefan Haberland struct dasd_psf_query_host_access *data) 51275a3b7b11SStefan Haberland { 51285a3b7b11SStefan Haberland struct dasd_eckd_private *private = device->private; 51295a3b7b11SStefan Haberland struct dasd_psf_query_host_access *host_access; 51305a3b7b11SStefan Haberland struct dasd_psf_prssd_data *prssdp; 51315a3b7b11SStefan Haberland struct dasd_ccw_req *cqr; 51325a3b7b11SStefan Haberland struct ccw1 *ccw; 51335a3b7b11SStefan Haberland int rc; 51345a3b7b11SStefan Haberland 51355a3b7b11SStefan Haberland /* not available for HYPER PAV alias devices */ 51365a3b7b11SStefan Haberland if (!device->block && private->lcu->pav == HYPER_PAV) 51375a3b7b11SStefan Haberland return -EOPNOTSUPP; 51385a3b7b11SStefan Haberland 51395a3b7b11SStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 51405a3b7b11SStefan Haberland sizeof(struct dasd_psf_prssd_data) + 1, 51415a3b7b11SStefan Haberland device); 51425a3b7b11SStefan Haberland if (IS_ERR(cqr)) { 51435a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 51445a3b7b11SStefan Haberland "Could not allocate read message buffer request"); 51455a3b7b11SStefan Haberland return PTR_ERR(cqr); 51465a3b7b11SStefan Haberland } 51475a3b7b11SStefan Haberland host_access = kzalloc(sizeof(*host_access), GFP_KERNEL | GFP_DMA); 51485a3b7b11SStefan Haberland if (!host_access) { 51495a3b7b11SStefan Haberland dasd_sfree_request(cqr, device); 51505a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 51515a3b7b11SStefan Haberland "Could not allocate host_access buffer"); 51525a3b7b11SStefan Haberland return -ENOMEM; 51535a3b7b11SStefan Haberland } 51545a3b7b11SStefan Haberland cqr->startdev = device; 51555a3b7b11SStefan Haberland cqr->memdev = device; 51565a3b7b11SStefan Haberland cqr->block = NULL; 51575a3b7b11SStefan Haberland cqr->retries = 256; 51585a3b7b11SStefan Haberland cqr->expires = 10 * HZ; 51595a3b7b11SStefan Haberland 51605a3b7b11SStefan Haberland /* Prepare for Read Subsystem Data */ 51615a3b7b11SStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 51625a3b7b11SStefan Haberland memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 51635a3b7b11SStefan Haberland prssdp->order = PSF_ORDER_PRSSD; 51645a3b7b11SStefan Haberland prssdp->suborder = PSF_SUBORDER_QHA; /* query host access */ 51655a3b7b11SStefan Haberland /* LSS and Volume that will be queried */ 51665a3b7b11SStefan Haberland prssdp->lss = private->ned->ID; 51675a3b7b11SStefan Haberland prssdp->volume = private->ned->unit_addr; 51685a3b7b11SStefan Haberland /* all other bytes of prssdp must be zero */ 51695a3b7b11SStefan Haberland 51705a3b7b11SStefan Haberland ccw = cqr->cpaddr; 51715a3b7b11SStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 51725a3b7b11SStefan Haberland ccw->count = sizeof(struct dasd_psf_prssd_data); 51735a3b7b11SStefan Haberland ccw->flags |= CCW_FLAG_CC; 51745a3b7b11SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 51755a3b7b11SStefan Haberland ccw->cda = (__u32)(addr_t) prssdp; 51765a3b7b11SStefan Haberland 51775a3b7b11SStefan Haberland /* Read Subsystem Data - query host access */ 51785a3b7b11SStefan Haberland ccw++; 51795a3b7b11SStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_RSSD; 51805a3b7b11SStefan Haberland ccw->count = sizeof(struct dasd_psf_query_host_access); 51815a3b7b11SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 51825a3b7b11SStefan Haberland ccw->cda = (__u32)(addr_t) host_access; 51835a3b7b11SStefan Haberland 51845a3b7b11SStefan Haberland cqr->buildclk = get_tod_clock(); 51855a3b7b11SStefan Haberland cqr->status = DASD_CQR_FILLED; 5186f50af850SStefan Haberland rc = dasd_sleep_on_interruptible(cqr); 51875a3b7b11SStefan Haberland if (rc == 0) { 51885a3b7b11SStefan Haberland *data = *host_access; 51895a3b7b11SStefan Haberland } else { 51905a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 51915a3b7b11SStefan Haberland "Reading host access data failed with rc=%d\n", 51925a3b7b11SStefan Haberland rc); 51935a3b7b11SStefan Haberland rc = -EOPNOTSUPP; 51945a3b7b11SStefan Haberland } 51955a3b7b11SStefan Haberland 51965a3b7b11SStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 51975a3b7b11SStefan Haberland kfree(host_access); 51985a3b7b11SStefan Haberland return rc; 51995a3b7b11SStefan Haberland } 52005a3b7b11SStefan Haberland /* 52015a3b7b11SStefan Haberland * return number of grouped devices 52025a3b7b11SStefan Haberland */ 52035a3b7b11SStefan Haberland static int dasd_eckd_host_access_count(struct dasd_device *device) 52045a3b7b11SStefan Haberland { 52055a3b7b11SStefan Haberland struct dasd_psf_query_host_access *access; 52065a3b7b11SStefan Haberland struct dasd_ckd_path_group_entry *entry; 52075a3b7b11SStefan Haberland struct dasd_ckd_host_information *info; 52085a3b7b11SStefan Haberland int count = 0; 52095a3b7b11SStefan Haberland int rc, i; 52105a3b7b11SStefan Haberland 52115a3b7b11SStefan Haberland access = kzalloc(sizeof(*access), GFP_NOIO); 52125a3b7b11SStefan Haberland if (!access) { 52135a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 52145a3b7b11SStefan Haberland "Could not allocate access buffer"); 52155a3b7b11SStefan Haberland return -ENOMEM; 52165a3b7b11SStefan Haberland } 52175a3b7b11SStefan Haberland rc = dasd_eckd_query_host_access(device, access); 52185a3b7b11SStefan Haberland if (rc) { 52195a3b7b11SStefan Haberland kfree(access); 52205a3b7b11SStefan Haberland return rc; 52215a3b7b11SStefan Haberland } 52225a3b7b11SStefan Haberland 52235a3b7b11SStefan Haberland info = (struct dasd_ckd_host_information *) 52245a3b7b11SStefan Haberland access->host_access_information; 52255a3b7b11SStefan Haberland for (i = 0; i < info->entry_count; i++) { 52265a3b7b11SStefan Haberland entry = (struct dasd_ckd_path_group_entry *) 52275a3b7b11SStefan Haberland (info->entry + i * info->entry_size); 52285a3b7b11SStefan Haberland if (entry->status_flags & DASD_ECKD_PG_GROUPED) 52295a3b7b11SStefan Haberland count++; 52305a3b7b11SStefan Haberland } 52315a3b7b11SStefan Haberland 52325a3b7b11SStefan Haberland kfree(access); 52335a3b7b11SStefan Haberland return count; 52345a3b7b11SStefan Haberland } 52355a3b7b11SStefan Haberland 52365a3b7b11SStefan Haberland /* 52375a3b7b11SStefan Haberland * write host access information to a sequential file 52385a3b7b11SStefan Haberland */ 52395a3b7b11SStefan Haberland static int dasd_hosts_print(struct dasd_device *device, struct seq_file *m) 52405a3b7b11SStefan Haberland { 52415a3b7b11SStefan Haberland struct dasd_psf_query_host_access *access; 52425a3b7b11SStefan Haberland struct dasd_ckd_path_group_entry *entry; 52435a3b7b11SStefan Haberland struct dasd_ckd_host_information *info; 52445a3b7b11SStefan Haberland char sysplex[9] = ""; 52455a3b7b11SStefan Haberland int rc, i, j; 52465a3b7b11SStefan Haberland 52475a3b7b11SStefan Haberland access = kzalloc(sizeof(*access), GFP_NOIO); 52485a3b7b11SStefan Haberland if (!access) { 52495a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 52505a3b7b11SStefan Haberland "Could not allocate access buffer"); 52515a3b7b11SStefan Haberland return -ENOMEM; 52525a3b7b11SStefan Haberland } 52535a3b7b11SStefan Haberland rc = dasd_eckd_query_host_access(device, access); 52545a3b7b11SStefan Haberland if (rc) { 52555a3b7b11SStefan Haberland kfree(access); 52565a3b7b11SStefan Haberland return rc; 52575a3b7b11SStefan Haberland } 52585a3b7b11SStefan Haberland 52595a3b7b11SStefan Haberland info = (struct dasd_ckd_host_information *) 52605a3b7b11SStefan Haberland access->host_access_information; 52615a3b7b11SStefan Haberland for (i = 0; i < info->entry_count; i++) { 52625a3b7b11SStefan Haberland entry = (struct dasd_ckd_path_group_entry *) 52635a3b7b11SStefan Haberland (info->entry + i * info->entry_size); 52645a3b7b11SStefan Haberland /* PGID */ 52655a3b7b11SStefan Haberland seq_puts(m, "pgid "); 52665a3b7b11SStefan Haberland for (j = 0; j < 11; j++) 52675a3b7b11SStefan Haberland seq_printf(m, "%02x", entry->pgid[j]); 52685a3b7b11SStefan Haberland seq_putc(m, '\n'); 52695a3b7b11SStefan Haberland /* FLAGS */ 52705a3b7b11SStefan Haberland seq_printf(m, "status_flags %02x\n", entry->status_flags); 52715a3b7b11SStefan Haberland /* SYSPLEX NAME */ 52725a3b7b11SStefan Haberland memcpy(&sysplex, &entry->sysplex_name, sizeof(sysplex) - 1); 52735a3b7b11SStefan Haberland EBCASC(sysplex, sizeof(sysplex)); 52745a3b7b11SStefan Haberland seq_printf(m, "sysplex_name %8s\n", sysplex); 52755a3b7b11SStefan Haberland /* SUPPORTED CYLINDER */ 52765a3b7b11SStefan Haberland seq_printf(m, "supported_cylinder %d\n", entry->cylinder); 52775a3b7b11SStefan Haberland /* TIMESTAMP */ 52785a3b7b11SStefan Haberland seq_printf(m, "timestamp %lu\n", (unsigned long) 52795a3b7b11SStefan Haberland entry->timestamp); 52805a3b7b11SStefan Haberland } 52815a3b7b11SStefan Haberland kfree(access); 52825a3b7b11SStefan Haberland 52835a3b7b11SStefan Haberland return 0; 52845a3b7b11SStefan Haberland } 52855a3b7b11SStefan Haberland 52865db8440cSStefan Haberland /* 52875db8440cSStefan Haberland * Perform Subsystem Function - CUIR response 52885db8440cSStefan Haberland */ 52895db8440cSStefan Haberland static int 52905db8440cSStefan Haberland dasd_eckd_psf_cuir_response(struct dasd_device *device, int response, 52915db8440cSStefan Haberland __u32 message_id, 52925db8440cSStefan Haberland struct channel_path_desc *desc, 52935db8440cSStefan Haberland struct subchannel_id sch_id) 52945db8440cSStefan Haberland { 52955db8440cSStefan Haberland struct dasd_psf_cuir_response *psf_cuir; 52965db8440cSStefan Haberland struct dasd_ccw_req *cqr; 52975db8440cSStefan Haberland struct ccw1 *ccw; 52985db8440cSStefan Haberland int rc; 52995db8440cSStefan Haberland 53005db8440cSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 53015db8440cSStefan Haberland sizeof(struct dasd_psf_cuir_response), 53025db8440cSStefan Haberland device); 53035db8440cSStefan Haberland 53045db8440cSStefan Haberland if (IS_ERR(cqr)) { 53055db8440cSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 53065db8440cSStefan Haberland "Could not allocate PSF-CUIR request"); 53075db8440cSStefan Haberland return PTR_ERR(cqr); 53085db8440cSStefan Haberland } 53095db8440cSStefan Haberland 53105db8440cSStefan Haberland psf_cuir = (struct dasd_psf_cuir_response *)cqr->data; 53115db8440cSStefan Haberland psf_cuir->order = PSF_ORDER_CUIR_RESPONSE; 53125db8440cSStefan Haberland psf_cuir->cc = response; 53135db8440cSStefan Haberland if (desc) 53145db8440cSStefan Haberland psf_cuir->chpid = desc->chpid; 53155db8440cSStefan Haberland psf_cuir->message_id = message_id; 53165db8440cSStefan Haberland psf_cuir->cssid = sch_id.cssid; 53175db8440cSStefan Haberland psf_cuir->ssid = sch_id.ssid; 53185db8440cSStefan Haberland ccw = cqr->cpaddr; 53195db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 53205db8440cSStefan Haberland ccw->cda = (__u32)(addr_t)psf_cuir; 5321b179b037SStefan Haberland ccw->flags = CCW_FLAG_SLI; 53225db8440cSStefan Haberland ccw->count = sizeof(struct dasd_psf_cuir_response); 53235db8440cSStefan Haberland 53245db8440cSStefan Haberland cqr->startdev = device; 53255db8440cSStefan Haberland cqr->memdev = device; 53265db8440cSStefan Haberland cqr->block = NULL; 53275db8440cSStefan Haberland cqr->retries = 256; 53285db8440cSStefan Haberland cqr->expires = 10*HZ; 53295db8440cSStefan Haberland cqr->buildclk = get_tod_clock(); 53305db8440cSStefan Haberland cqr->status = DASD_CQR_FILLED; 5331b179b037SStefan Haberland set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 53325db8440cSStefan Haberland 53335db8440cSStefan Haberland rc = dasd_sleep_on(cqr); 53345db8440cSStefan Haberland 53355db8440cSStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 53365db8440cSStefan Haberland return rc; 53375db8440cSStefan Haberland } 53385db8440cSStefan Haberland 5339b179b037SStefan Haberland /* 5340b179b037SStefan Haberland * return configuration data that is referenced by record selector 5341b179b037SStefan Haberland * if a record selector is specified or per default return the 5342b179b037SStefan Haberland * conf_data pointer for the path specified by lpum 5343b179b037SStefan Haberland */ 5344b179b037SStefan Haberland static struct dasd_conf_data *dasd_eckd_get_ref_conf(struct dasd_device *device, 5345b179b037SStefan Haberland __u8 lpum, 5346b179b037SStefan Haberland struct dasd_cuir_message *cuir) 53475db8440cSStefan Haberland { 5348b179b037SStefan Haberland struct dasd_conf_data *conf_data; 5349b179b037SStefan Haberland int path, pos; 53505db8440cSStefan Haberland 5351b179b037SStefan Haberland if (cuir->record_selector == 0) 5352b179b037SStefan Haberland goto out; 5353b179b037SStefan Haberland for (path = 0x80, pos = 0; path; path >>= 1, pos++) { 5354c9346151SStefan Haberland conf_data = device->path[pos].conf_data; 5355b179b037SStefan Haberland if (conf_data->gneq.record_selector == 5356b179b037SStefan Haberland cuir->record_selector) 5357b179b037SStefan Haberland return conf_data; 53585db8440cSStefan Haberland } 5359b179b037SStefan Haberland out: 5360c9346151SStefan Haberland return device->path[pathmask_to_pos(lpum)].conf_data; 53615db8440cSStefan Haberland } 53625db8440cSStefan Haberland 53635db8440cSStefan Haberland /* 5364b179b037SStefan Haberland * This function determines the scope of a reconfiguration request by 5365b179b037SStefan Haberland * analysing the path and device selection data provided in the CUIR request. 5366b179b037SStefan Haberland * Returns a path mask containing CUIR affected paths for the give device. 5367b179b037SStefan Haberland * 5368b179b037SStefan Haberland * If the CUIR request does not contain the required information return the 5369b179b037SStefan Haberland * path mask of the path the attention message for the CUIR request was reveived 5370b179b037SStefan Haberland * on. 5371b179b037SStefan Haberland */ 5372b179b037SStefan Haberland static int dasd_eckd_cuir_scope(struct dasd_device *device, __u8 lpum, 5373b179b037SStefan Haberland struct dasd_cuir_message *cuir) 5374b179b037SStefan Haberland { 5375b179b037SStefan Haberland struct dasd_conf_data *ref_conf_data; 5376b179b037SStefan Haberland unsigned long bitmask = 0, mask = 0; 5377b179b037SStefan Haberland struct dasd_conf_data *conf_data; 5378b179b037SStefan Haberland unsigned int pos, path; 5379b179b037SStefan Haberland char *ref_gneq, *gneq; 5380b179b037SStefan Haberland char *ref_ned, *ned; 5381b179b037SStefan Haberland int tbcpm = 0; 5382b179b037SStefan Haberland 5383b179b037SStefan Haberland /* if CUIR request does not specify the scope use the path 5384b179b037SStefan Haberland the attention message was presented on */ 5385b179b037SStefan Haberland if (!cuir->ned_map || 5386b179b037SStefan Haberland !(cuir->neq_map[0] | cuir->neq_map[1] | cuir->neq_map[2])) 5387b179b037SStefan Haberland return lpum; 5388b179b037SStefan Haberland 5389b179b037SStefan Haberland /* get reference conf data */ 5390b179b037SStefan Haberland ref_conf_data = dasd_eckd_get_ref_conf(device, lpum, cuir); 5391b179b037SStefan Haberland /* reference ned is determined by ned_map field */ 5392b179b037SStefan Haberland pos = 8 - ffs(cuir->ned_map); 5393b179b037SStefan Haberland ref_ned = (char *)&ref_conf_data->neds[pos]; 5394b179b037SStefan Haberland ref_gneq = (char *)&ref_conf_data->gneq; 5395b179b037SStefan Haberland /* transfer 24 bit neq_map to mask */ 5396b179b037SStefan Haberland mask = cuir->neq_map[2]; 5397b179b037SStefan Haberland mask |= cuir->neq_map[1] << 8; 5398b179b037SStefan Haberland mask |= cuir->neq_map[0] << 16; 5399b179b037SStefan Haberland 5400c9346151SStefan Haberland for (path = 0; path < 8; path++) { 5401b179b037SStefan Haberland /* initialise data per path */ 5402b179b037SStefan Haberland bitmask = mask; 5403c9346151SStefan Haberland conf_data = device->path[path].conf_data; 5404b179b037SStefan Haberland pos = 8 - ffs(cuir->ned_map); 5405b179b037SStefan Haberland ned = (char *) &conf_data->neds[pos]; 5406b179b037SStefan Haberland /* compare reference ned and per path ned */ 5407b179b037SStefan Haberland if (memcmp(ref_ned, ned, sizeof(*ned)) != 0) 5408b179b037SStefan Haberland continue; 5409b179b037SStefan Haberland gneq = (char *)&conf_data->gneq; 5410b179b037SStefan Haberland /* compare reference gneq and per_path gneq under 5411b179b037SStefan Haberland 24 bit mask where mask bit 0 equals byte 7 of 5412b179b037SStefan Haberland the gneq and mask bit 24 equals byte 31 */ 5413b179b037SStefan Haberland while (bitmask) { 5414b179b037SStefan Haberland pos = ffs(bitmask) - 1; 5415b179b037SStefan Haberland if (memcmp(&ref_gneq[31 - pos], &gneq[31 - pos], 1) 5416b179b037SStefan Haberland != 0) 5417b179b037SStefan Haberland break; 5418b179b037SStefan Haberland clear_bit(pos, &bitmask); 5419b179b037SStefan Haberland } 5420b179b037SStefan Haberland if (bitmask) 5421b179b037SStefan Haberland continue; 5422b179b037SStefan Haberland /* device and path match the reference values 5423b179b037SStefan Haberland add path to CUIR scope */ 5424c9346151SStefan Haberland tbcpm |= 0x80 >> path; 5425b179b037SStefan Haberland } 5426b179b037SStefan Haberland return tbcpm; 5427b179b037SStefan Haberland } 5428b179b037SStefan Haberland 5429b179b037SStefan Haberland static void dasd_eckd_cuir_notify_user(struct dasd_device *device, 5430b179b037SStefan Haberland unsigned long paths, 5431b179b037SStefan Haberland struct subchannel_id sch_id, int action) 5432b179b037SStefan Haberland { 5433b179b037SStefan Haberland struct channel_path_desc *desc; 5434b179b037SStefan Haberland int pos; 5435b179b037SStefan Haberland 5436b179b037SStefan Haberland while (paths) { 5437b179b037SStefan Haberland /* get position of bit in mask */ 5438b179b037SStefan Haberland pos = ffs(paths) - 1; 5439b179b037SStefan Haberland /* get channel path descriptor from this position */ 5440b179b037SStefan Haberland desc = ccw_device_get_chp_desc(device->cdev, 7 - pos); 5441b179b037SStefan Haberland if (action == CUIR_QUIESCE) 5442b179b037SStefan Haberland pr_warn("Service on the storage server caused path " 5443b179b037SStefan Haberland "%x.%02x to go offline", sch_id.cssid, 5444b179b037SStefan Haberland desc ? desc->chpid : 0); 5445b179b037SStefan Haberland else if (action == CUIR_RESUME) 5446b179b037SStefan Haberland pr_info("Path %x.%02x is back online after service " 5447b179b037SStefan Haberland "on the storage server", sch_id.cssid, 5448b179b037SStefan Haberland desc ? desc->chpid : 0); 5449b179b037SStefan Haberland kfree(desc); 5450b179b037SStefan Haberland clear_bit(pos, &paths); 5451b179b037SStefan Haberland } 5452b179b037SStefan Haberland } 5453b179b037SStefan Haberland 5454b179b037SStefan Haberland static int dasd_eckd_cuir_remove_path(struct dasd_device *device, __u8 lpum, 5455b179b037SStefan Haberland struct dasd_cuir_message *cuir) 5456b179b037SStefan Haberland { 5457b179b037SStefan Haberland unsigned long tbcpm; 5458b179b037SStefan Haberland 5459b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(device, lpum, cuir); 5460b179b037SStefan Haberland /* nothing to do if path is not in use */ 5461c9346151SStefan Haberland if (!(dasd_path_get_opm(device) & tbcpm)) 5462b179b037SStefan Haberland return 0; 5463c9346151SStefan Haberland if (!(dasd_path_get_opm(device) & ~tbcpm)) { 5464b179b037SStefan Haberland /* no path would be left if the CUIR action is taken 5465b179b037SStefan Haberland return error */ 5466b179b037SStefan Haberland return -EINVAL; 5467b179b037SStefan Haberland } 5468b179b037SStefan Haberland /* remove device from operational path mask */ 5469c9346151SStefan Haberland dasd_path_remove_opm(device, tbcpm); 5470c9346151SStefan Haberland dasd_path_add_cuirpm(device, tbcpm); 5471b179b037SStefan Haberland return tbcpm; 5472b179b037SStefan Haberland } 5473b179b037SStefan Haberland 5474b179b037SStefan Haberland /* 5475b179b037SStefan Haberland * walk through all devices and build a path mask to quiesce them 5476b179b037SStefan Haberland * return an error if the last path to a device would be removed 54775db8440cSStefan Haberland * 54785db8440cSStefan Haberland * if only part of the devices are quiesced and an error 54795db8440cSStefan Haberland * occurs no onlining necessary, the storage server will 54805db8440cSStefan Haberland * notify the already set offline devices again 54815db8440cSStefan Haberland */ 54825db8440cSStefan Haberland static int dasd_eckd_cuir_quiesce(struct dasd_device *device, __u8 lpum, 5483b179b037SStefan Haberland struct subchannel_id sch_id, 5484b179b037SStefan Haberland struct dasd_cuir_message *cuir) 54855db8440cSStefan Haberland { 5486543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 54875db8440cSStefan Haberland struct alias_pav_group *pavgroup, *tempgroup; 54885db8440cSStefan Haberland struct dasd_device *dev, *n; 5489b179b037SStefan Haberland unsigned long paths = 0; 5490b179b037SStefan Haberland unsigned long flags; 5491b179b037SStefan Haberland int tbcpm; 54925db8440cSStefan Haberland 54935db8440cSStefan Haberland /* active devices */ 5494b179b037SStefan Haberland list_for_each_entry_safe(dev, n, &private->lcu->active_devices, 54955db8440cSStefan Haberland alias_list) { 5496b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 5497b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 5498b179b037SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); 5499b179b037SStefan Haberland if (tbcpm < 0) 5500b179b037SStefan Haberland goto out_err; 5501b179b037SStefan Haberland paths |= tbcpm; 55025db8440cSStefan Haberland } 55035db8440cSStefan Haberland /* inactive devices */ 5504b179b037SStefan Haberland list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices, 55055db8440cSStefan Haberland alias_list) { 5506b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 5507b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 5508b179b037SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); 5509b179b037SStefan Haberland if (tbcpm < 0) 5510b179b037SStefan Haberland goto out_err; 5511b179b037SStefan Haberland paths |= tbcpm; 55125db8440cSStefan Haberland } 55135db8440cSStefan Haberland /* devices in PAV groups */ 55145db8440cSStefan Haberland list_for_each_entry_safe(pavgroup, tempgroup, 55155db8440cSStefan Haberland &private->lcu->grouplist, group) { 55165db8440cSStefan Haberland list_for_each_entry_safe(dev, n, &pavgroup->baselist, 55175db8440cSStefan Haberland alias_list) { 5518b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 5519b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 5520b179b037SStefan Haberland spin_unlock_irqrestore( 5521b179b037SStefan Haberland get_ccwdev_lock(dev->cdev), flags); 5522b179b037SStefan Haberland if (tbcpm < 0) 5523b179b037SStefan Haberland goto out_err; 5524b179b037SStefan Haberland paths |= tbcpm; 55255db8440cSStefan Haberland } 55265db8440cSStefan Haberland list_for_each_entry_safe(dev, n, &pavgroup->aliaslist, 55275db8440cSStefan Haberland alias_list) { 5528b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 5529b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 5530b179b037SStefan Haberland spin_unlock_irqrestore( 5531b179b037SStefan Haberland get_ccwdev_lock(dev->cdev), flags); 5532b179b037SStefan Haberland if (tbcpm < 0) 5533b179b037SStefan Haberland goto out_err; 5534b179b037SStefan Haberland paths |= tbcpm; 55355db8440cSStefan Haberland } 55365db8440cSStefan Haberland } 5537b179b037SStefan Haberland /* notify user about all paths affected by CUIR action */ 5538b179b037SStefan Haberland dasd_eckd_cuir_notify_user(device, paths, sch_id, CUIR_QUIESCE); 5539b179b037SStefan Haberland return 0; 5540b179b037SStefan Haberland out_err: 5541b179b037SStefan Haberland return tbcpm; 55425db8440cSStefan Haberland } 55435db8440cSStefan Haberland 55445db8440cSStefan Haberland static int dasd_eckd_cuir_resume(struct dasd_device *device, __u8 lpum, 5545b179b037SStefan Haberland struct subchannel_id sch_id, 5546b179b037SStefan Haberland struct dasd_cuir_message *cuir) 55475db8440cSStefan Haberland { 5548543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 55495db8440cSStefan Haberland struct alias_pav_group *pavgroup, *tempgroup; 55505db8440cSStefan Haberland struct dasd_device *dev, *n; 5551b179b037SStefan Haberland unsigned long paths = 0; 5552b179b037SStefan Haberland int tbcpm; 55535db8440cSStefan Haberland 55545db8440cSStefan Haberland /* 55555db8440cSStefan Haberland * the path may have been added through a generic path event before 55565db8440cSStefan Haberland * only trigger path verification if the path is not already in use 55575db8440cSStefan Haberland */ 55585db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 55595db8440cSStefan Haberland &private->lcu->active_devices, 55605db8440cSStefan Haberland alias_list) { 5561b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 5562b179b037SStefan Haberland paths |= tbcpm; 5563c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 5564c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 55655db8440cSStefan Haberland dasd_schedule_device_bh(dev); 55665db8440cSStefan Haberland } 55675db8440cSStefan Haberland } 55685db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 55695db8440cSStefan Haberland &private->lcu->inactive_devices, 55705db8440cSStefan Haberland alias_list) { 5571b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 5572b179b037SStefan Haberland paths |= tbcpm; 5573c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 5574c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 55755db8440cSStefan Haberland dasd_schedule_device_bh(dev); 55765db8440cSStefan Haberland } 55775db8440cSStefan Haberland } 55785db8440cSStefan Haberland /* devices in PAV groups */ 55795db8440cSStefan Haberland list_for_each_entry_safe(pavgroup, tempgroup, 55805db8440cSStefan Haberland &private->lcu->grouplist, 55815db8440cSStefan Haberland group) { 55825db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 55835db8440cSStefan Haberland &pavgroup->baselist, 55845db8440cSStefan Haberland alias_list) { 5585b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 5586b179b037SStefan Haberland paths |= tbcpm; 5587c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 5588c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 55895db8440cSStefan Haberland dasd_schedule_device_bh(dev); 55905db8440cSStefan Haberland } 55915db8440cSStefan Haberland } 55925db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 55935db8440cSStefan Haberland &pavgroup->aliaslist, 55945db8440cSStefan Haberland alias_list) { 5595b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 5596b179b037SStefan Haberland paths |= tbcpm; 5597c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 5598c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 55995db8440cSStefan Haberland dasd_schedule_device_bh(dev); 56005db8440cSStefan Haberland } 56015db8440cSStefan Haberland } 56025db8440cSStefan Haberland } 5603b179b037SStefan Haberland /* notify user about all paths affected by CUIR action */ 5604b179b037SStefan Haberland dasd_eckd_cuir_notify_user(device, paths, sch_id, CUIR_RESUME); 5605b179b037SStefan Haberland return 0; 56065db8440cSStefan Haberland } 56075db8440cSStefan Haberland 56085db8440cSStefan Haberland static void dasd_eckd_handle_cuir(struct dasd_device *device, void *messages, 56095db8440cSStefan Haberland __u8 lpum) 56105db8440cSStefan Haberland { 56115db8440cSStefan Haberland struct dasd_cuir_message *cuir = messages; 56125db8440cSStefan Haberland struct channel_path_desc *desc; 56135db8440cSStefan Haberland struct subchannel_id sch_id; 56145db8440cSStefan Haberland int pos, response; 56155db8440cSStefan Haberland 5616b179b037SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, 5617b179b037SStefan Haberland "CUIR request: %016llx %016llx %016llx %08x", 5618b179b037SStefan Haberland ((u64 *)cuir)[0], ((u64 *)cuir)[1], ((u64 *)cuir)[2], 5619b179b037SStefan Haberland ((u32 *)cuir)[3]); 5620b179b037SStefan Haberland ccw_device_get_schid(device->cdev, &sch_id); 56219d49f86dSSebastian Ott pos = pathmask_to_pos(lpum); 56225db8440cSStefan Haberland desc = ccw_device_get_chp_desc(device->cdev, pos); 56235db8440cSStefan Haberland 56245db8440cSStefan Haberland if (cuir->code == CUIR_QUIESCE) { 56255db8440cSStefan Haberland /* quiesce */ 5626b179b037SStefan Haberland if (dasd_eckd_cuir_quiesce(device, lpum, sch_id, cuir)) 5627b179b037SStefan Haberland response = PSF_CUIR_LAST_PATH; 5628b179b037SStefan Haberland else 5629b179b037SStefan Haberland response = PSF_CUIR_COMPLETED; 56305db8440cSStefan Haberland } else if (cuir->code == CUIR_RESUME) { 56315db8440cSStefan Haberland /* resume */ 5632b179b037SStefan Haberland dasd_eckd_cuir_resume(device, lpum, sch_id, cuir); 5633b179b037SStefan Haberland response = PSF_CUIR_COMPLETED; 56345db8440cSStefan Haberland } else 56355db8440cSStefan Haberland response = PSF_CUIR_NOT_SUPPORTED; 56365db8440cSStefan Haberland 5637b179b037SStefan Haberland dasd_eckd_psf_cuir_response(device, response, 5638b179b037SStefan Haberland cuir->message_id, desc, sch_id); 5639b179b037SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, 5640b179b037SStefan Haberland "CUIR response: %d on message ID %08x", response, 5641b179b037SStefan Haberland cuir->message_id); 56425db8440cSStefan Haberland /* free descriptor copy */ 56435db8440cSStefan Haberland kfree(desc); 5644b179b037SStefan Haberland /* to make sure there is no attention left schedule work again */ 5645b179b037SStefan Haberland device->discipline->check_attention(device, lpum); 56465db8440cSStefan Haberland } 56475db8440cSStefan Haberland 56485db8440cSStefan Haberland static void dasd_eckd_check_attention_work(struct work_struct *work) 56495db8440cSStefan Haberland { 56505db8440cSStefan Haberland struct check_attention_work_data *data; 56515db8440cSStefan Haberland struct dasd_rssd_messages *messages; 56525db8440cSStefan Haberland struct dasd_device *device; 56535db8440cSStefan Haberland int rc; 56545db8440cSStefan Haberland 56555db8440cSStefan Haberland data = container_of(work, struct check_attention_work_data, worker); 56565db8440cSStefan Haberland device = data->device; 56575db8440cSStefan Haberland messages = kzalloc(sizeof(*messages), GFP_KERNEL); 56585db8440cSStefan Haberland if (!messages) { 56595db8440cSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 56605db8440cSStefan Haberland "Could not allocate attention message buffer"); 56615db8440cSStefan Haberland goto out; 56625db8440cSStefan Haberland } 56635db8440cSStefan Haberland rc = dasd_eckd_read_message_buffer(device, messages, data->lpum); 56645db8440cSStefan Haberland if (rc) 56655db8440cSStefan Haberland goto out; 56665db8440cSStefan Haberland if (messages->length == ATTENTION_LENGTH_CUIR && 56675db8440cSStefan Haberland messages->format == ATTENTION_FORMAT_CUIR) 56685db8440cSStefan Haberland dasd_eckd_handle_cuir(device, messages, data->lpum); 56695db8440cSStefan Haberland out: 56705db8440cSStefan Haberland dasd_put_device(device); 56715db8440cSStefan Haberland kfree(messages); 56725db8440cSStefan Haberland kfree(data); 56735db8440cSStefan Haberland } 56745db8440cSStefan Haberland 56755db8440cSStefan Haberland static int dasd_eckd_check_attention(struct dasd_device *device, __u8 lpum) 56765db8440cSStefan Haberland { 56775db8440cSStefan Haberland struct check_attention_work_data *data; 56785db8440cSStefan Haberland 56795db8440cSStefan Haberland data = kzalloc(sizeof(*data), GFP_ATOMIC); 56805db8440cSStefan Haberland if (!data) 56815db8440cSStefan Haberland return -ENOMEM; 56825db8440cSStefan Haberland INIT_WORK(&data->worker, dasd_eckd_check_attention_work); 56835db8440cSStefan Haberland dasd_get_device(device); 56845db8440cSStefan Haberland data->device = device; 56855db8440cSStefan Haberland data->lpum = lpum; 56865db8440cSStefan Haberland schedule_work(&data->worker); 56875db8440cSStefan Haberland return 0; 56885db8440cSStefan Haberland } 56895db8440cSStefan Haberland 5690d41dd122SStefan Haberland static struct ccw_driver dasd_eckd_driver = { 56913bda058bSSebastian Ott .driver = { 5692d41dd122SStefan Haberland .name = "dasd-eckd", 5693d41dd122SStefan Haberland .owner = THIS_MODULE, 56943bda058bSSebastian Ott }, 5695d41dd122SStefan Haberland .ids = dasd_eckd_ids, 5696d41dd122SStefan Haberland .probe = dasd_eckd_probe, 5697d41dd122SStefan Haberland .remove = dasd_generic_remove, 5698d41dd122SStefan Haberland .set_offline = dasd_generic_set_offline, 5699d41dd122SStefan Haberland .set_online = dasd_eckd_set_online, 5700d41dd122SStefan Haberland .notify = dasd_generic_notify, 5701a4d26c6aSStefan Weinhuber .path_event = dasd_generic_path_event, 57024679e893SStefan Haberland .shutdown = dasd_generic_shutdown, 5703d41dd122SStefan Haberland .freeze = dasd_generic_pm_freeze, 5704d41dd122SStefan Haberland .thaw = dasd_generic_restore_device, 5705d41dd122SStefan Haberland .restore = dasd_generic_restore_device, 5706a23ed009SStefan Haberland .uc_handler = dasd_generic_uc_handler, 5707420f42ecSHeiko Carstens .int_class = IRQIO_DAS, 5708d41dd122SStefan Haberland }; 5709f3eb5384SStefan Weinhuber 57101da177e4SLinus Torvalds /* 57111da177e4SLinus Torvalds * max_blocks is dependent on the amount of storage that is available 57121da177e4SLinus Torvalds * in the static io buffer for each device. Currently each device has 57131da177e4SLinus Torvalds * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has 57141da177e4SLinus Torvalds * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use 57151da177e4SLinus Torvalds * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In 57161da177e4SLinus Torvalds * addition we have one define extent ccw + 16 bytes of data and one 57171da177e4SLinus Torvalds * locate record ccw + 16 bytes of data. That makes: 57181da177e4SLinus Torvalds * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. 57191da177e4SLinus Torvalds * We want to fit two into the available memory so that we can immediately 57201da177e4SLinus Torvalds * start the next request if one finishes off. That makes 249.5 blocks 57211da177e4SLinus Torvalds * for one request. Give a little safety and the result is 240. 57221da177e4SLinus Torvalds */ 57231da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline = { 57241da177e4SLinus Torvalds .owner = THIS_MODULE, 57251da177e4SLinus Torvalds .name = "ECKD", 57261da177e4SLinus Torvalds .ebcname = "ECKD", 5727ef19298bSStefan Weinhuber .max_blocks = 190, 57281da177e4SLinus Torvalds .check_device = dasd_eckd_check_characteristics, 57298e09f215SStefan Weinhuber .uncheck_device = dasd_eckd_uncheck_device, 57301da177e4SLinus Torvalds .do_analysis = dasd_eckd_do_analysis, 5731a4d26c6aSStefan Weinhuber .verify_path = dasd_eckd_verify_path, 5732d42e1712SStefan Haberland .basic_to_ready = dasd_eckd_basic_to_ready, 57338e09f215SStefan Weinhuber .online_to_ready = dasd_eckd_online_to_ready, 5734daa991bfSStefan Haberland .basic_to_known = dasd_eckd_basic_to_known, 57351da177e4SLinus Torvalds .fill_geometry = dasd_eckd_fill_geometry, 57361da177e4SLinus Torvalds .start_IO = dasd_start_IO, 57371da177e4SLinus Torvalds .term_IO = dasd_term_IO, 57388e09f215SStefan Weinhuber .handle_terminated_request = dasd_eckd_handle_terminated_request, 57391da177e4SLinus Torvalds .format_device = dasd_eckd_format_device, 57408fd57520SJan Höppner .check_device_format = dasd_eckd_check_device_format, 57411da177e4SLinus Torvalds .erp_action = dasd_eckd_erp_action, 57421da177e4SLinus Torvalds .erp_postaction = dasd_eckd_erp_postaction, 57435a27e60dSStefan Weinhuber .check_for_device_change = dasd_eckd_check_for_device_change, 57448e09f215SStefan Weinhuber .build_cp = dasd_eckd_build_alias_cp, 57458e09f215SStefan Weinhuber .free_cp = dasd_eckd_free_alias_cp, 57461da177e4SLinus Torvalds .dump_sense = dasd_eckd_dump_sense, 5747fc19f381SStefan Haberland .dump_sense_dbf = dasd_eckd_dump_sense_dbf, 57481da177e4SLinus Torvalds .fill_info = dasd_eckd_fill_info, 57491107ccfbSChristoph Hellwig .ioctl = dasd_eckd_ioctl, 5750d41dd122SStefan Haberland .freeze = dasd_eckd_pm_freeze, 5751d41dd122SStefan Haberland .restore = dasd_eckd_restore_device, 5752501183f2SStefan Haberland .reload = dasd_eckd_reload_device, 57532dedf0d9SStefan Haberland .get_uid = dasd_eckd_get_uid, 5754f1633031SStefan Haberland .kick_validate = dasd_eckd_kick_validate_server, 57555db8440cSStefan Haberland .check_attention = dasd_eckd_check_attention, 57565a3b7b11SStefan Haberland .host_access_count = dasd_eckd_host_access_count, 57575a3b7b11SStefan Haberland .hosts_print = dasd_hosts_print, 57581da177e4SLinus Torvalds }; 57591da177e4SLinus Torvalds 57601da177e4SLinus Torvalds static int __init 57611da177e4SLinus Torvalds dasd_eckd_init(void) 57621da177e4SLinus Torvalds { 5763736e6ea0SSebastian Ott int ret; 5764736e6ea0SSebastian Ott 57651da177e4SLinus Torvalds ASCEBC(dasd_eckd_discipline.ebcname, 4); 5766f932bceaSStefan Weinhuber dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), 5767f932bceaSStefan Weinhuber GFP_KERNEL | GFP_DMA); 5768f932bceaSStefan Weinhuber if (!dasd_reserve_req) 5769f932bceaSStefan Weinhuber return -ENOMEM; 5770a4d26c6aSStefan Weinhuber path_verification_worker = kmalloc(sizeof(*path_verification_worker), 5771a4d26c6aSStefan Weinhuber GFP_KERNEL | GFP_DMA); 5772a4d26c6aSStefan Weinhuber if (!path_verification_worker) { 5773a4d26c6aSStefan Weinhuber kfree(dasd_reserve_req); 5774a4d26c6aSStefan Weinhuber return -ENOMEM; 5775a4d26c6aSStefan Weinhuber } 5776558b9ef0SStefan Weinhuber rawpadpage = (void *)__get_free_page(GFP_KERNEL); 5777558b9ef0SStefan Weinhuber if (!rawpadpage) { 5778558b9ef0SStefan Weinhuber kfree(path_verification_worker); 5779558b9ef0SStefan Weinhuber kfree(dasd_reserve_req); 5780558b9ef0SStefan Weinhuber return -ENOMEM; 5781558b9ef0SStefan Weinhuber } 5782736e6ea0SSebastian Ott ret = ccw_driver_register(&dasd_eckd_driver); 5783736e6ea0SSebastian Ott if (!ret) 5784736e6ea0SSebastian Ott wait_for_device_probe(); 5785a4d26c6aSStefan Weinhuber else { 5786a4d26c6aSStefan Weinhuber kfree(path_verification_worker); 5787f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 5788558b9ef0SStefan Weinhuber free_page((unsigned long)rawpadpage); 5789a4d26c6aSStefan Weinhuber } 5790736e6ea0SSebastian Ott return ret; 57911da177e4SLinus Torvalds } 57921da177e4SLinus Torvalds 57931da177e4SLinus Torvalds static void __exit 57941da177e4SLinus Torvalds dasd_eckd_cleanup(void) 57951da177e4SLinus Torvalds { 57961da177e4SLinus Torvalds ccw_driver_unregister(&dasd_eckd_driver); 5797a4d26c6aSStefan Weinhuber kfree(path_verification_worker); 5798f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 5799558b9ef0SStefan Weinhuber free_page((unsigned long)rawpadpage); 58001da177e4SLinus Torvalds } 58011da177e4SLinus Torvalds 58021da177e4SLinus Torvalds module_init(dasd_eckd_init); 58031da177e4SLinus Torvalds module_exit(dasd_eckd_cleanup); 5804