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++) { 1045c7c0c9deSStefan Haberland kfree(private->path_conf_data[i]); 1046c7c0c9deSStefan Haberland private->path_conf_data[i] = 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; 1058a4d26c6aSStefan Weinhuber struct dasd_path *path_data; 1059b206181dSStefan Haberland struct dasd_uid *uid; 1060b206181dSStefan Haberland char print_path_uid[60], print_device_uid[60]; 10611da177e4SLinus Torvalds 1062543691a4SSebastian Ott private = device->private; 1063a4d26c6aSStefan Weinhuber path_data = &device->path_data; 1064a4d26c6aSStefan Weinhuber opm = ccw_device_get_path_mask(device->cdev); 10651da177e4SLinus Torvalds conf_data_saved = 0; 106655d3a85cSStefan Haberland path_err = 0; 10671da177e4SLinus Torvalds /* get configuration data per operational path */ 10681da177e4SLinus Torvalds for (lpm = 0x80; lpm; lpm>>= 1) { 1069b206181dSStefan Haberland if (!(lpm & opm)) 1070b206181dSStefan Haberland continue; 107117283b56SCornelia Huck rc = dasd_eckd_read_conf_lpm(device, &conf_data, 10721da177e4SLinus Torvalds &conf_len, lpm); 10731da177e4SLinus Torvalds if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ 1074b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 10751da177e4SLinus Torvalds "Read configuration data returned " 1076b8ed5dd5SStefan Haberland "error %d", rc); 10771da177e4SLinus Torvalds return rc; 10781da177e4SLinus Torvalds } 10791da177e4SLinus Torvalds if (conf_data == NULL) { 1080b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1081b8ed5dd5SStefan Haberland "No configuration data " 1082b8ed5dd5SStefan Haberland "retrieved"); 1083a4d26c6aSStefan Weinhuber /* no further analysis possible */ 1084a4d26c6aSStefan Weinhuber path_data->opm |= lpm; 1085d133a960SGabriel Craciunescu continue; /* no error */ 10861da177e4SLinus Torvalds } 10871da177e4SLinus Torvalds /* save first valid configuration data */ 10881da177e4SLinus Torvalds if (!conf_data_saved) { 1089c7c0c9deSStefan Haberland /* initially clear previously stored conf_data */ 1090c7c0c9deSStefan Haberland dasd_eckd_clear_conf_data(device); 10914abb08c2SStefan Weinhuber private->conf_data = conf_data; 10924abb08c2SStefan Weinhuber private->conf_len = conf_len; 10934abb08c2SStefan Weinhuber if (dasd_eckd_identify_conf_parts(private)) { 10944abb08c2SStefan Weinhuber private->conf_data = NULL; 10954abb08c2SStefan Weinhuber private->conf_len = 0; 10964abb08c2SStefan Weinhuber kfree(conf_data); 10974abb08c2SStefan Weinhuber continue; 10984abb08c2SStefan Weinhuber } 1099c7c0c9deSStefan Haberland pos = pathmask_to_pos(lpm); 1100c7c0c9deSStefan Haberland /* store per path conf_data */ 1101c7c0c9deSStefan Haberland private->path_conf_data[pos] = 1102c7c0c9deSStefan Haberland (struct dasd_conf_data *) conf_data; 1103b206181dSStefan Haberland /* 1104b206181dSStefan Haberland * build device UID that other path data 1105b206181dSStefan Haberland * can be compared to it 1106b206181dSStefan Haberland */ 1107b206181dSStefan Haberland dasd_eckd_generate_uid(device); 11081da177e4SLinus Torvalds conf_data_saved++; 1109b206181dSStefan Haberland } else { 1110b206181dSStefan Haberland path_private.conf_data = conf_data; 1111b206181dSStefan Haberland path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1112b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts( 1113b206181dSStefan Haberland &path_private)) { 1114b206181dSStefan Haberland path_private.conf_data = NULL; 1115b206181dSStefan Haberland path_private.conf_len = 0; 1116b206181dSStefan Haberland kfree(conf_data); 1117b206181dSStefan Haberland continue; 1118b206181dSStefan Haberland } 1119b206181dSStefan Haberland if (dasd_eckd_compare_path_uid( 1120b206181dSStefan Haberland device, &path_private)) { 1121b206181dSStefan Haberland uid = &path_private.uid; 1122b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1123b206181dSStefan Haberland snprintf(print_path_uid, 1124b206181dSStefan Haberland sizeof(print_path_uid), 1125b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1126b206181dSStefan Haberland uid->vendor, uid->serial, 1127b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1128b206181dSStefan Haberland uid->vduit); 1129b206181dSStefan Haberland else 1130b206181dSStefan Haberland snprintf(print_path_uid, 1131b206181dSStefan Haberland sizeof(print_path_uid), 1132b206181dSStefan Haberland "%s.%s.%04x.%02x", 1133b206181dSStefan Haberland uid->vendor, uid->serial, 1134b206181dSStefan Haberland uid->ssid, 1135b206181dSStefan Haberland uid->real_unit_addr); 1136b206181dSStefan Haberland uid = &private->uid; 1137b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1138b206181dSStefan Haberland snprintf(print_device_uid, 1139b206181dSStefan Haberland sizeof(print_device_uid), 1140b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1141b206181dSStefan Haberland uid->vendor, uid->serial, 1142b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1143b206181dSStefan Haberland uid->vduit); 1144b206181dSStefan Haberland else 1145b206181dSStefan Haberland snprintf(print_device_uid, 1146b206181dSStefan Haberland sizeof(print_device_uid), 1147b206181dSStefan Haberland "%s.%s.%04x.%02x", 1148b206181dSStefan Haberland uid->vendor, uid->serial, 1149b206181dSStefan Haberland uid->ssid, 1150b206181dSStefan Haberland uid->real_unit_addr); 1151b206181dSStefan Haberland dev_err(&device->cdev->dev, 1152b206181dSStefan Haberland "Not all channel paths lead to " 1153b206181dSStefan Haberland "the same device, path %02X leads to " 1154b206181dSStefan Haberland "device %s instead of %s\n", lpm, 1155b206181dSStefan Haberland print_path_uid, print_device_uid); 115655d3a85cSStefan Haberland path_err = -EINVAL; 11575db8440cSStefan Haberland path_data->cablepm |= lpm; 115855d3a85cSStefan Haberland continue; 1159b206181dSStefan Haberland } 1160c7c0c9deSStefan Haberland pos = pathmask_to_pos(lpm); 1161c7c0c9deSStefan Haberland /* store per path conf_data */ 1162c7c0c9deSStefan Haberland private->path_conf_data[pos] = 1163c7c0c9deSStefan Haberland (struct dasd_conf_data *) conf_data; 1164b206181dSStefan Haberland path_private.conf_data = NULL; 1165b206181dSStefan Haberland path_private.conf_len = 0; 11661da177e4SLinus Torvalds } 11674abb08c2SStefan Weinhuber switch (dasd_eckd_path_access(conf_data, conf_len)) { 11681da177e4SLinus Torvalds case 0x02: 11691da177e4SLinus Torvalds path_data->npm |= lpm; 11701da177e4SLinus Torvalds break; 11711da177e4SLinus Torvalds case 0x03: 11721da177e4SLinus Torvalds path_data->ppm |= lpm; 11731da177e4SLinus Torvalds break; 11741da177e4SLinus Torvalds } 1175ccc0e7dcSStefan Haberland if (!path_data->opm) { 1176ccc0e7dcSStefan Haberland path_data->opm = lpm; 1177ccc0e7dcSStefan Haberland dasd_generic_path_operational(device); 1178ccc0e7dcSStefan Haberland } else { 1179a4d26c6aSStefan Weinhuber path_data->opm |= lpm; 1180ccc0e7dcSStefan Haberland } 11815db8440cSStefan Haberland /* 11825db8440cSStefan Haberland * if the path is used 11835db8440cSStefan Haberland * it should not be in one of the negative lists 11845db8440cSStefan Haberland */ 11855db8440cSStefan Haberland path_data->cablepm &= ~lpm; 11865db8440cSStefan Haberland path_data->hpfpm &= ~lpm; 11875db8440cSStefan Haberland path_data->cuirpm &= ~lpm; 11881da177e4SLinus Torvalds } 1189b206181dSStefan Haberland 119055d3a85cSStefan Haberland return path_err; 11911da177e4SLinus Torvalds } 11921da177e4SLinus Torvalds 1193a4d26c6aSStefan Weinhuber static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm) 1194a4d26c6aSStefan Weinhuber { 1195543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1196a4d26c6aSStefan Weinhuber int mdc; 1197a4d26c6aSStefan Weinhuber u32 fcx_max_data; 1198a4d26c6aSStefan Weinhuber 1199a4d26c6aSStefan Weinhuber if (private->fcx_max_data) { 1200a4d26c6aSStefan Weinhuber mdc = ccw_device_get_mdc(device->cdev, lpm); 1201a4d26c6aSStefan Weinhuber if ((mdc < 0)) { 1202a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1203a4d26c6aSStefan Weinhuber "Detecting the maximum data size for zHPF " 1204a4d26c6aSStefan Weinhuber "requests failed (rc=%d) for a new path %x\n", 1205a4d26c6aSStefan Weinhuber mdc, lpm); 1206a4d26c6aSStefan Weinhuber return mdc; 1207a4d26c6aSStefan Weinhuber } 1208a4d26c6aSStefan Weinhuber fcx_max_data = mdc * FCX_MAX_DATA_FACTOR; 1209a4d26c6aSStefan Weinhuber if (fcx_max_data < private->fcx_max_data) { 1210a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1211a4d26c6aSStefan Weinhuber "The maximum data size for zHPF requests %u " 1212a4d26c6aSStefan Weinhuber "on a new path %x is below the active maximum " 1213a4d26c6aSStefan Weinhuber "%u\n", fcx_max_data, lpm, 1214a4d26c6aSStefan Weinhuber private->fcx_max_data); 1215a4d26c6aSStefan Weinhuber return -EACCES; 1216a4d26c6aSStefan Weinhuber } 1217a4d26c6aSStefan Weinhuber } 1218a4d26c6aSStefan Weinhuber return 0; 1219a4d26c6aSStefan Weinhuber } 1220a4d26c6aSStefan Weinhuber 1221b206181dSStefan Haberland static int rebuild_device_uid(struct dasd_device *device, 1222b206181dSStefan Haberland struct path_verification_work_data *data) 1223b206181dSStefan Haberland { 1224543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1225543691a4SSebastian Ott struct dasd_path *path_data = &device->path_data; 1226543691a4SSebastian Ott __u8 lpm, opm = path_data->opm; 1227543691a4SSebastian Ott int rc = -ENODEV; 1228b206181dSStefan Haberland 1229b206181dSStefan Haberland for (lpm = 0x80; lpm; lpm >>= 1) { 1230b206181dSStefan Haberland if (!(lpm & opm)) 1231b206181dSStefan Haberland continue; 1232b206181dSStefan Haberland memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1233b206181dSStefan Haberland memset(&data->cqr, 0, sizeof(data->cqr)); 1234b206181dSStefan Haberland data->cqr.cpaddr = &data->ccw; 1235b206181dSStefan Haberland rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1236b206181dSStefan Haberland data->rcd_buffer, 1237b206181dSStefan Haberland lpm); 1238b206181dSStefan Haberland 1239b206181dSStefan Haberland if (rc) { 1240b206181dSStefan Haberland if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */ 1241b206181dSStefan Haberland continue; 1242b206181dSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1243b206181dSStefan Haberland "Read configuration data " 1244b206181dSStefan Haberland "returned error %d", rc); 1245b206181dSStefan Haberland break; 1246b206181dSStefan Haberland } 1247b206181dSStefan Haberland memcpy(private->conf_data, data->rcd_buffer, 1248b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE); 1249b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts(private)) { 1250b206181dSStefan Haberland rc = -ENODEV; 1251b206181dSStefan Haberland } else /* first valid path is enough */ 1252b206181dSStefan Haberland break; 1253b206181dSStefan Haberland } 1254b206181dSStefan Haberland 1255b206181dSStefan Haberland if (!rc) 1256b206181dSStefan Haberland rc = dasd_eckd_generate_uid(device); 1257b206181dSStefan Haberland 1258b206181dSStefan Haberland return rc; 1259b206181dSStefan Haberland } 1260b206181dSStefan Haberland 1261a4d26c6aSStefan Weinhuber static void do_path_verification_work(struct work_struct *work) 1262a4d26c6aSStefan Weinhuber { 1263a4d26c6aSStefan Weinhuber struct path_verification_work_data *data; 1264a4d26c6aSStefan Weinhuber struct dasd_device *device; 1265b206181dSStefan Haberland struct dasd_eckd_private path_private; 1266b206181dSStefan Haberland struct dasd_uid *uid; 1267b206181dSStefan Haberland __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE]; 12685db8440cSStefan Haberland __u8 lpm, opm, npm, ppm, epm, hpfpm, cablepm; 1269a4d26c6aSStefan Weinhuber unsigned long flags; 1270b206181dSStefan Haberland char print_uid[60]; 1271a4d26c6aSStefan Weinhuber int rc; 1272a4d26c6aSStefan Weinhuber 1273a4d26c6aSStefan Weinhuber data = container_of(work, struct path_verification_work_data, worker); 1274a4d26c6aSStefan Weinhuber device = data->device; 1275a4d26c6aSStefan Weinhuber 1276c8d1c0ffSStefan Haberland /* delay path verification until device was resumed */ 1277c8d1c0ffSStefan Haberland if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 1278c8d1c0ffSStefan Haberland schedule_work(work); 1279c8d1c0ffSStefan Haberland return; 1280c8d1c0ffSStefan Haberland } 12811eb38023SStefan Haberland /* check if path verification already running and delay if so */ 12821eb38023SStefan Haberland if (test_and_set_bit(DASD_FLAG_PATH_VERIFY, &device->flags)) { 12831eb38023SStefan Haberland schedule_work(work); 12841eb38023SStefan Haberland return; 12851eb38023SStefan Haberland } 1286a4d26c6aSStefan Weinhuber opm = 0; 1287a4d26c6aSStefan Weinhuber npm = 0; 1288a4d26c6aSStefan Weinhuber ppm = 0; 1289a4d26c6aSStefan Weinhuber epm = 0; 12905db8440cSStefan Haberland hpfpm = 0; 12915db8440cSStefan Haberland cablepm = 0; 12925db8440cSStefan Haberland 1293a4d26c6aSStefan Weinhuber for (lpm = 0x80; lpm; lpm >>= 1) { 1294b206181dSStefan Haberland if (!(lpm & data->tbvpm)) 1295b206181dSStefan Haberland continue; 1296b206181dSStefan Haberland memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1297a4d26c6aSStefan Weinhuber memset(&data->cqr, 0, sizeof(data->cqr)); 1298a4d26c6aSStefan Weinhuber data->cqr.cpaddr = &data->ccw; 1299a4d26c6aSStefan Weinhuber rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1300a4d26c6aSStefan Weinhuber data->rcd_buffer, 1301a4d26c6aSStefan Weinhuber lpm); 1302a4d26c6aSStefan Weinhuber if (!rc) { 1303a4d26c6aSStefan Weinhuber switch (dasd_eckd_path_access(data->rcd_buffer, 1304b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE) 1305b206181dSStefan Haberland ) { 1306a4d26c6aSStefan Weinhuber case 0x02: 1307a4d26c6aSStefan Weinhuber npm |= lpm; 1308a4d26c6aSStefan Weinhuber break; 1309a4d26c6aSStefan Weinhuber case 0x03: 1310a4d26c6aSStefan Weinhuber ppm |= lpm; 1311a4d26c6aSStefan Weinhuber break; 1312a4d26c6aSStefan Weinhuber } 1313a4d26c6aSStefan Weinhuber opm |= lpm; 1314a4d26c6aSStefan Weinhuber } else if (rc == -EOPNOTSUPP) { 1315a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1316a4d26c6aSStefan Weinhuber "path verification: No configuration " 1317a4d26c6aSStefan Weinhuber "data retrieved"); 1318a4d26c6aSStefan Weinhuber opm |= lpm; 1319a4d26c6aSStefan Weinhuber } else if (rc == -EAGAIN) { 1320a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1321a4d26c6aSStefan Weinhuber "path verification: device is stopped," 1322a4d26c6aSStefan Weinhuber " try again later"); 1323a4d26c6aSStefan Weinhuber epm |= lpm; 1324a4d26c6aSStefan Weinhuber } else { 1325a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1326a4d26c6aSStefan Weinhuber "Reading device feature codes failed " 1327a4d26c6aSStefan Weinhuber "(rc=%d) for new path %x\n", rc, lpm); 1328a4d26c6aSStefan Weinhuber continue; 1329a4d26c6aSStefan Weinhuber } 1330a4d26c6aSStefan Weinhuber if (verify_fcx_max_data(device, lpm)) { 1331a4d26c6aSStefan Weinhuber opm &= ~lpm; 1332a4d26c6aSStefan Weinhuber npm &= ~lpm; 1333a4d26c6aSStefan Weinhuber ppm &= ~lpm; 13345db8440cSStefan Haberland hpfpm |= lpm; 1335b206181dSStefan Haberland continue; 1336b206181dSStefan Haberland } 1337b206181dSStefan Haberland 1338b206181dSStefan Haberland /* 1339b206181dSStefan Haberland * save conf_data for comparison after 1340b206181dSStefan Haberland * rebuild_device_uid may have changed 1341b206181dSStefan Haberland * the original data 1342b206181dSStefan Haberland */ 1343b206181dSStefan Haberland memcpy(&path_rcd_buf, data->rcd_buffer, 1344b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE); 1345b206181dSStefan Haberland path_private.conf_data = (void *) &path_rcd_buf; 1346b206181dSStefan Haberland path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1347b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts(&path_private)) { 1348b206181dSStefan Haberland path_private.conf_data = NULL; 1349b206181dSStefan Haberland path_private.conf_len = 0; 1350b206181dSStefan Haberland continue; 1351b206181dSStefan Haberland } 1352b206181dSStefan Haberland 1353b206181dSStefan Haberland /* 1354b206181dSStefan Haberland * compare path UID with device UID only if at least 1355b206181dSStefan Haberland * one valid path is left 1356b206181dSStefan Haberland * in other case the device UID may have changed and 1357b206181dSStefan Haberland * the first working path UID will be used as device UID 1358b206181dSStefan Haberland */ 1359b206181dSStefan Haberland if (device->path_data.opm && 1360b206181dSStefan Haberland dasd_eckd_compare_path_uid(device, &path_private)) { 1361b206181dSStefan Haberland /* 1362b206181dSStefan Haberland * the comparison was not successful 1363b206181dSStefan Haberland * rebuild the device UID with at least one 1364b206181dSStefan Haberland * known path in case a z/VM hyperswap command 1365b206181dSStefan Haberland * has changed the device 1366b206181dSStefan Haberland * 1367b206181dSStefan Haberland * after this compare again 1368b206181dSStefan Haberland * 1369b206181dSStefan Haberland * if either the rebuild or the recompare fails 1370b206181dSStefan Haberland * the path can not be used 1371b206181dSStefan Haberland */ 1372b206181dSStefan Haberland if (rebuild_device_uid(device, data) || 1373b206181dSStefan Haberland dasd_eckd_compare_path_uid( 1374b206181dSStefan Haberland device, &path_private)) { 1375b206181dSStefan Haberland uid = &path_private.uid; 1376b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1377b206181dSStefan Haberland snprintf(print_uid, sizeof(print_uid), 1378b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1379b206181dSStefan Haberland uid->vendor, uid->serial, 1380b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1381b206181dSStefan Haberland uid->vduit); 1382b206181dSStefan Haberland else 1383b206181dSStefan Haberland snprintf(print_uid, sizeof(print_uid), 1384b206181dSStefan Haberland "%s.%s.%04x.%02x", 1385b206181dSStefan Haberland uid->vendor, uid->serial, 1386b206181dSStefan Haberland uid->ssid, 1387b206181dSStefan Haberland uid->real_unit_addr); 1388b206181dSStefan Haberland dev_err(&device->cdev->dev, 1389b206181dSStefan Haberland "The newly added channel path %02X " 1390b206181dSStefan Haberland "will not be used because it leads " 1391b206181dSStefan Haberland "to a different device %s\n", 1392b206181dSStefan Haberland lpm, print_uid); 1393b206181dSStefan Haberland opm &= ~lpm; 1394b206181dSStefan Haberland npm &= ~lpm; 1395b206181dSStefan Haberland ppm &= ~lpm; 13965db8440cSStefan Haberland cablepm |= lpm; 1397b206181dSStefan Haberland continue; 1398a4d26c6aSStefan Weinhuber } 1399a4d26c6aSStefan Weinhuber } 1400b206181dSStefan Haberland 1401a4d26c6aSStefan Weinhuber /* 1402a4d26c6aSStefan Weinhuber * There is a small chance that a path is lost again between 1403a4d26c6aSStefan Weinhuber * above path verification and the following modification of 1404a4d26c6aSStefan Weinhuber * the device opm mask. We could avoid that race here by using 1405a4d26c6aSStefan Weinhuber * yet another path mask, but we rather deal with this unlikely 1406a4d26c6aSStefan Weinhuber * situation in dasd_start_IO. 1407a4d26c6aSStefan Weinhuber */ 1408a4d26c6aSStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1409a4d26c6aSStefan Weinhuber if (!device->path_data.opm && opm) { 1410a4d26c6aSStefan Weinhuber device->path_data.opm = opm; 14115db8440cSStefan Haberland device->path_data.cablepm &= ~opm; 14125db8440cSStefan Haberland device->path_data.cuirpm &= ~opm; 14135db8440cSStefan Haberland device->path_data.hpfpm &= ~opm; 1414a4d26c6aSStefan Weinhuber dasd_generic_path_operational(device); 14155db8440cSStefan Haberland } else { 1416a4d26c6aSStefan Weinhuber device->path_data.opm |= opm; 14175db8440cSStefan Haberland device->path_data.cablepm &= ~opm; 14185db8440cSStefan Haberland device->path_data.cuirpm &= ~opm; 14195db8440cSStefan Haberland device->path_data.hpfpm &= ~opm; 14205db8440cSStefan Haberland } 1421a4d26c6aSStefan Weinhuber device->path_data.npm |= npm; 1422a4d26c6aSStefan Weinhuber device->path_data.ppm |= ppm; 1423a4d26c6aSStefan Weinhuber device->path_data.tbvpm |= epm; 14245db8440cSStefan Haberland device->path_data.cablepm |= cablepm; 14255db8440cSStefan Haberland device->path_data.hpfpm |= hpfpm; 1426a4d26c6aSStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1427b206181dSStefan Haberland } 14281eb38023SStefan Haberland clear_bit(DASD_FLAG_PATH_VERIFY, &device->flags); 1429a4d26c6aSStefan Weinhuber dasd_put_device(device); 1430a4d26c6aSStefan Weinhuber if (data->isglobal) 1431a4d26c6aSStefan Weinhuber mutex_unlock(&dasd_path_verification_mutex); 1432a4d26c6aSStefan Weinhuber else 1433a4d26c6aSStefan Weinhuber kfree(data); 1434a4d26c6aSStefan Weinhuber } 1435a4d26c6aSStefan Weinhuber 1436a4d26c6aSStefan Weinhuber static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm) 1437a4d26c6aSStefan Weinhuber { 1438a4d26c6aSStefan Weinhuber struct path_verification_work_data *data; 1439a4d26c6aSStefan Weinhuber 1440a4d26c6aSStefan Weinhuber data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA); 1441a4d26c6aSStefan Weinhuber if (!data) { 1442a4d26c6aSStefan Weinhuber if (mutex_trylock(&dasd_path_verification_mutex)) { 1443a4d26c6aSStefan Weinhuber data = path_verification_worker; 1444a4d26c6aSStefan Weinhuber data->isglobal = 1; 1445a4d26c6aSStefan Weinhuber } else 1446a4d26c6aSStefan Weinhuber return -ENOMEM; 1447a4d26c6aSStefan Weinhuber } else { 1448a4d26c6aSStefan Weinhuber memset(data, 0, sizeof(*data)); 1449a4d26c6aSStefan Weinhuber data->isglobal = 0; 1450a4d26c6aSStefan Weinhuber } 1451a4d26c6aSStefan Weinhuber INIT_WORK(&data->worker, do_path_verification_work); 1452a4d26c6aSStefan Weinhuber dasd_get_device(device); 1453a4d26c6aSStefan Weinhuber data->device = device; 1454a4d26c6aSStefan Weinhuber data->tbvpm = lpm; 1455a4d26c6aSStefan Weinhuber schedule_work(&data->worker); 1456a4d26c6aSStefan Weinhuber return 0; 1457a4d26c6aSStefan Weinhuber } 1458a4d26c6aSStefan Weinhuber 14598e09f215SStefan Weinhuber static int dasd_eckd_read_features(struct dasd_device *device) 14608e09f215SStefan Weinhuber { 1461543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 14628e09f215SStefan Weinhuber struct dasd_psf_prssd_data *prssdp; 14638e09f215SStefan Weinhuber struct dasd_rssd_features *features; 14648e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 14658e09f215SStefan Weinhuber struct ccw1 *ccw; 14668e09f215SStefan Weinhuber int rc; 14678e09f215SStefan Weinhuber 146868d1e5f0SStefan Weinhuber memset(&private->features, 0, sizeof(struct dasd_rssd_features)); 146968b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 14708e09f215SStefan Weinhuber (sizeof(struct dasd_psf_prssd_data) + 14718e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)), 14728e09f215SStefan Weinhuber device); 14738e09f215SStefan Weinhuber if (IS_ERR(cqr)) { 1474b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " 1475b8ed5dd5SStefan Haberland "allocate initialization request"); 14768e09f215SStefan Weinhuber return PTR_ERR(cqr); 14778e09f215SStefan Weinhuber } 14788e09f215SStefan Weinhuber cqr->startdev = device; 14798e09f215SStefan Weinhuber cqr->memdev = device; 14808e09f215SStefan Weinhuber cqr->block = NULL; 1481eb6e199bSStefan Weinhuber cqr->retries = 256; 14828e09f215SStefan Weinhuber cqr->expires = 10 * HZ; 14838e09f215SStefan Weinhuber 14848e09f215SStefan Weinhuber /* Prepare for Read Subsystem Data */ 14858e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 14868e09f215SStefan Weinhuber memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 14878e09f215SStefan Weinhuber prssdp->order = PSF_ORDER_PRSSD; 14888e09f215SStefan Weinhuber prssdp->suborder = 0x41; /* Read Feature Codes */ 14898e09f215SStefan Weinhuber /* all other bytes of prssdp must be zero */ 14908e09f215SStefan Weinhuber 14918e09f215SStefan Weinhuber ccw = cqr->cpaddr; 14928e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PSF; 14938e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_psf_prssd_data); 14948e09f215SStefan Weinhuber ccw->flags |= CCW_FLAG_CC; 14958e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) prssdp; 14968e09f215SStefan Weinhuber 14978e09f215SStefan Weinhuber /* Read Subsystem Data - feature codes */ 14988e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 14998e09f215SStefan Weinhuber memset(features, 0, sizeof(struct dasd_rssd_features)); 15008e09f215SStefan Weinhuber 15018e09f215SStefan Weinhuber ccw++; 15028e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RSSD; 15038e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_rssd_features); 15048e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) features; 15058e09f215SStefan Weinhuber 15061aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 15078e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 15088e09f215SStefan Weinhuber rc = dasd_sleep_on(cqr); 15098e09f215SStefan Weinhuber if (rc == 0) { 15108e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 15118e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 15128e09f215SStefan Weinhuber memcpy(&private->features, features, 15138e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)); 151468d1e5f0SStefan Weinhuber } else 151568d1e5f0SStefan Weinhuber dev_warn(&device->cdev->dev, "Reading device feature codes" 151668d1e5f0SStefan Weinhuber " failed with rc=%d\n", rc); 15178e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 15188e09f215SStefan Weinhuber return rc; 15198e09f215SStefan Weinhuber } 15208e09f215SStefan Weinhuber 15218e09f215SStefan Weinhuber 15223d052595SHorst Hummel /* 152340545573SHorst Hummel * Build CP for Perform Subsystem Function - SSC. 152440545573SHorst Hummel */ 1525f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, 1526f3eb5384SStefan Weinhuber int enable_pav) 152740545573SHorst Hummel { 152840545573SHorst Hummel struct dasd_ccw_req *cqr; 152940545573SHorst Hummel struct dasd_psf_ssc_data *psf_ssc_data; 153040545573SHorst Hummel struct ccw1 *ccw; 153140545573SHorst Hummel 153268b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 153340545573SHorst Hummel sizeof(struct dasd_psf_ssc_data), 153440545573SHorst Hummel device); 153540545573SHorst Hummel 153640545573SHorst Hummel if (IS_ERR(cqr)) { 1537fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 153840545573SHorst Hummel "Could not allocate PSF-SSC request"); 153940545573SHorst Hummel return cqr; 154040545573SHorst Hummel } 154140545573SHorst Hummel psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 154240545573SHorst Hummel psf_ssc_data->order = PSF_ORDER_SSC; 1543626350b6SStefan Weinhuber psf_ssc_data->suborder = 0xc0; 1544f3eb5384SStefan Weinhuber if (enable_pav) { 1545626350b6SStefan Weinhuber psf_ssc_data->suborder |= 0x08; 15468e09f215SStefan Weinhuber psf_ssc_data->reserved[0] = 0x88; 1547f3eb5384SStefan Weinhuber } 154840545573SHorst Hummel ccw = cqr->cpaddr; 154940545573SHorst Hummel ccw->cmd_code = DASD_ECKD_CCW_PSF; 155040545573SHorst Hummel ccw->cda = (__u32)(addr_t)psf_ssc_data; 155140545573SHorst Hummel ccw->count = 66; 155240545573SHorst Hummel 15538e09f215SStefan Weinhuber cqr->startdev = device; 15548e09f215SStefan Weinhuber cqr->memdev = device; 15558e09f215SStefan Weinhuber cqr->block = NULL; 1556eb6e199bSStefan Weinhuber cqr->retries = 256; 155740545573SHorst Hummel cqr->expires = 10*HZ; 15581aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 155940545573SHorst Hummel cqr->status = DASD_CQR_FILLED; 156040545573SHorst Hummel return cqr; 156140545573SHorst Hummel } 156240545573SHorst Hummel 156340545573SHorst Hummel /* 156440545573SHorst Hummel * Perform Subsystem Function. 156540545573SHorst Hummel * It is necessary to trigger CIO for channel revalidation since this 156640545573SHorst Hummel * call might change behaviour of DASD devices. 156740545573SHorst Hummel */ 156840545573SHorst Hummel static int 156912d7b107SStefan Haberland dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav, 157012d7b107SStefan Haberland unsigned long flags) 157140545573SHorst Hummel { 157240545573SHorst Hummel struct dasd_ccw_req *cqr; 157340545573SHorst Hummel int rc; 157440545573SHorst Hummel 1575f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_psf_ssc(device, enable_pav); 157640545573SHorst Hummel if (IS_ERR(cqr)) 157740545573SHorst Hummel return PTR_ERR(cqr); 157840545573SHorst Hummel 157912d7b107SStefan Haberland /* 158012d7b107SStefan Haberland * set flags e.g. turn on failfast, to prevent blocking 158112d7b107SStefan Haberland * the calling function should handle failed requests 158212d7b107SStefan Haberland */ 158312d7b107SStefan Haberland cqr->flags |= flags; 158412d7b107SStefan Haberland 158540545573SHorst Hummel rc = dasd_sleep_on(cqr); 158640545573SHorst Hummel if (!rc) 158740545573SHorst Hummel /* trigger CIO to reprobe devices */ 158840545573SHorst Hummel css_schedule_reprobe(); 158912d7b107SStefan Haberland else if (cqr->intrc == -EAGAIN) 159012d7b107SStefan Haberland rc = -EAGAIN; 159112d7b107SStefan Haberland 15928e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 159340545573SHorst Hummel return rc; 159440545573SHorst Hummel } 159540545573SHorst Hummel 159640545573SHorst Hummel /* 159740545573SHorst Hummel * Valide storage server of current device. 159840545573SHorst Hummel */ 159912d7b107SStefan Haberland static int dasd_eckd_validate_server(struct dasd_device *device, 160012d7b107SStefan Haberland unsigned long flags) 160140545573SHorst Hummel { 1602543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1603543691a4SSebastian Ott int enable_pav, rc; 160440545573SHorst Hummel 1605f9f8d02fSStefan Haberland if (private->uid.type == UA_BASE_PAV_ALIAS || 1606f9f8d02fSStefan Haberland private->uid.type == UA_HYPER_PAV_ALIAS) 160712d7b107SStefan Haberland return 0; 160840545573SHorst Hummel if (dasd_nopav || MACHINE_IS_VM) 1609f3eb5384SStefan Weinhuber enable_pav = 0; 1610f3eb5384SStefan Weinhuber else 1611f3eb5384SStefan Weinhuber enable_pav = 1; 161212d7b107SStefan Haberland rc = dasd_eckd_psf_ssc(device, enable_pav, flags); 1613eb6e199bSStefan Weinhuber 161440545573SHorst Hummel /* may be requested feature is not available on server, 161540545573SHorst Hummel * therefore just report error and go ahead */ 1616b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " 1617b8ed5dd5SStefan Haberland "returned rc=%d", private->uid.ssid, rc); 161812d7b107SStefan Haberland return rc; 161940545573SHorst Hummel } 162040545573SHorst Hummel 1621f1633031SStefan Haberland /* 1622f1633031SStefan Haberland * worker to do a validate server in case of a lost pathgroup 1623f1633031SStefan Haberland */ 1624f1633031SStefan Haberland static void dasd_eckd_do_validate_server(struct work_struct *work) 1625f1633031SStefan Haberland { 1626f1633031SStefan Haberland struct dasd_device *device = container_of(work, struct dasd_device, 1627f1633031SStefan Haberland kick_validate); 1628ea4da6eaSStefan Haberland unsigned long flags = 0; 1629ea4da6eaSStefan Haberland 1630ea4da6eaSStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &flags); 1631ea4da6eaSStefan Haberland if (dasd_eckd_validate_server(device, flags) 163212d7b107SStefan Haberland == -EAGAIN) { 163312d7b107SStefan Haberland /* schedule worker again if failed */ 163412d7b107SStefan Haberland schedule_work(&device->kick_validate); 163512d7b107SStefan Haberland return; 163612d7b107SStefan Haberland } 163712d7b107SStefan Haberland 1638f1633031SStefan Haberland dasd_put_device(device); 1639f1633031SStefan Haberland } 1640f1633031SStefan Haberland 1641f1633031SStefan Haberland static void dasd_eckd_kick_validate_server(struct dasd_device *device) 1642f1633031SStefan Haberland { 1643f1633031SStefan Haberland dasd_get_device(device); 164425e2cf1cSStefan Haberland /* exit if device not online or in offline processing */ 164525e2cf1cSStefan Haberland if (test_bit(DASD_FLAG_OFFLINE, &device->flags) || 164625e2cf1cSStefan Haberland device->state < DASD_STATE_ONLINE) { 164725e2cf1cSStefan Haberland dasd_put_device(device); 164825e2cf1cSStefan Haberland return; 164925e2cf1cSStefan Haberland } 1650f1633031SStefan Haberland /* queue call to do_validate_server to the kernel event daemon. */ 1651f2608cd4SStefan Haberland if (!schedule_work(&device->kick_validate)) 1652f2608cd4SStefan Haberland dasd_put_device(device); 1653f1633031SStefan Haberland } 1654f1633031SStefan Haberland 1655ef19298bSStefan Weinhuber static u32 get_fcx_max_data(struct dasd_device *device) 1656ef19298bSStefan Weinhuber { 1657543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1658ef19298bSStefan Weinhuber int fcx_in_css, fcx_in_gneq, fcx_in_features; 1659543691a4SSebastian Ott int tpm, mdc; 1660ef19298bSStefan Weinhuber 1661ef19298bSStefan Weinhuber if (dasd_nofcx) 1662ef19298bSStefan Weinhuber return 0; 1663ef19298bSStefan Weinhuber /* is transport mode supported? */ 1664ef19298bSStefan Weinhuber fcx_in_css = css_general_characteristics.fcx; 1665ef19298bSStefan Weinhuber fcx_in_gneq = private->gneq->reserved2[7] & 0x04; 1666ef19298bSStefan Weinhuber fcx_in_features = private->features.feature[40] & 0x80; 1667ef19298bSStefan Weinhuber tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; 1668ef19298bSStefan Weinhuber 1669ef19298bSStefan Weinhuber if (!tpm) 1670ef19298bSStefan Weinhuber return 0; 1671ef19298bSStefan Weinhuber 1672ef19298bSStefan Weinhuber mdc = ccw_device_get_mdc(device->cdev, 0); 1673ef19298bSStefan Weinhuber if (mdc < 0) { 1674ef19298bSStefan Weinhuber dev_warn(&device->cdev->dev, "Detecting the maximum supported" 1675ef19298bSStefan Weinhuber " data size for zHPF requests failed\n"); 1676ef19298bSStefan Weinhuber return 0; 1677ef19298bSStefan Weinhuber } else 1678ef19298bSStefan Weinhuber return mdc * FCX_MAX_DATA_FACTOR; 1679ef19298bSStefan Weinhuber } 1680ef19298bSStefan Weinhuber 168140545573SHorst Hummel /* 16823d052595SHorst Hummel * Check device characteristics. 16833d052595SHorst Hummel * If the device is accessible using ECKD discipline, the device is enabled. 16843d052595SHorst Hummel */ 16851da177e4SLinus Torvalds static int 16861da177e4SLinus Torvalds dasd_eckd_check_characteristics(struct dasd_device *device) 16871da177e4SLinus Torvalds { 1688543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 16898e09f215SStefan Weinhuber struct dasd_block *block; 16902dedf0d9SStefan Haberland struct dasd_uid temp_uid; 1691f9f8d02fSStefan Haberland int rc, i; 169233b62a30SStefan Weinhuber int readonly; 16937c8faa86SStefan Haberland unsigned long value; 16941da177e4SLinus Torvalds 1695f1633031SStefan Haberland /* setup work queue for validate server*/ 1696f1633031SStefan Haberland INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server); 169759a9ed5fSStefan Haberland /* setup work queue for summary unit check */ 169859a9ed5fSStefan Haberland INIT_WORK(&device->suc_work, dasd_alias_handle_summary_unit_check); 1699f1633031SStefan Haberland 1700454e1fa1SPeter Oberparleiter if (!ccw_device_is_pathgroup(device->cdev)) { 1701454e1fa1SPeter Oberparleiter dev_warn(&device->cdev->dev, 1702454e1fa1SPeter Oberparleiter "A channel path group could not be established\n"); 1703454e1fa1SPeter Oberparleiter return -EIO; 1704454e1fa1SPeter Oberparleiter } 1705454e1fa1SPeter Oberparleiter if (!ccw_device_is_multipath(device->cdev)) { 1706454e1fa1SPeter Oberparleiter dev_info(&device->cdev->dev, 1707454e1fa1SPeter Oberparleiter "The DASD is not operating in multipath mode\n"); 1708454e1fa1SPeter Oberparleiter } 170992636b15SSebastian Ott if (!private) { 171092636b15SSebastian Ott private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); 171192636b15SSebastian Ott if (!private) { 1712fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1713fc19f381SStefan Haberland "Allocating memory for private DASD data " 1714fc19f381SStefan Haberland "failed\n"); 17151da177e4SLinus Torvalds return -ENOMEM; 17161da177e4SLinus Torvalds } 1717543691a4SSebastian Ott device->private = private; 171892636b15SSebastian Ott } else { 171992636b15SSebastian Ott memset(private, 0, sizeof(*private)); 17201da177e4SLinus Torvalds } 17211da177e4SLinus Torvalds /* Invalidate status of initial analysis. */ 17221da177e4SLinus Torvalds private->init_cqr_status = -1; 17231da177e4SLinus Torvalds /* Set default cache operations. */ 17241da177e4SLinus Torvalds private->attrib.operation = DASD_NORMAL_CACHE; 17251da177e4SLinus Torvalds private->attrib.nr_cyl = 0; 17261da177e4SLinus Torvalds 172740545573SHorst Hummel /* Read Configuration Data */ 172840545573SHorst Hummel rc = dasd_eckd_read_conf(device); 172940545573SHorst Hummel if (rc) 17308e09f215SStefan Weinhuber goto out_err1; 173140545573SHorst Hummel 17327c8faa86SStefan Haberland /* set default timeout */ 17337c8faa86SStefan Haberland device->default_expires = DASD_EXPIRES; 17341f1ee9adSHannes Reinecke /* set default retry count */ 17351f1ee9adSHannes Reinecke device->default_retries = DASD_RETRIES; 17361f1ee9adSHannes Reinecke 17377c8faa86SStefan Haberland if (private->gneq) { 17387c8faa86SStefan Haberland value = 1; 17397c8faa86SStefan Haberland for (i = 0; i < private->gneq->timeout.value; i++) 17407c8faa86SStefan Haberland value = 10 * value; 17417c8faa86SStefan Haberland value = value * private->gneq->timeout.number; 17427c8faa86SStefan Haberland /* do not accept useless values */ 17437c8faa86SStefan Haberland if (value != 0 && value <= DASD_EXPIRES_MAX) 17447c8faa86SStefan Haberland device->default_expires = value; 17457c8faa86SStefan Haberland } 17467c8faa86SStefan Haberland 17472dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 17482dedf0d9SStefan Haberland if (temp_uid.type == UA_BASE_DEVICE) { 17498e09f215SStefan Weinhuber block = dasd_alloc_block(); 17508e09f215SStefan Weinhuber if (IS_ERR(block)) { 1751b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1752b8ed5dd5SStefan Haberland "could not allocate dasd " 1753b8ed5dd5SStefan Haberland "block structure"); 17548e09f215SStefan Weinhuber rc = PTR_ERR(block); 17558e09f215SStefan Weinhuber goto out_err1; 17568e09f215SStefan Weinhuber } 17578e09f215SStefan Weinhuber device->block = block; 17588e09f215SStefan Weinhuber block->base = device; 17598e09f215SStefan Weinhuber } 17608e09f215SStefan Weinhuber 1761f9f8d02fSStefan Haberland /* register lcu with alias handling, enable PAV */ 1762f9f8d02fSStefan Haberland rc = dasd_alias_make_device_known_to_lcu(device); 1763f9f8d02fSStefan Haberland if (rc) 17648e09f215SStefan Weinhuber goto out_err2; 1765f9f8d02fSStefan Haberland 176612d7b107SStefan Haberland dasd_eckd_validate_server(device, 0); 1767f4ac1d02SStefan Weinhuber 1768f4ac1d02SStefan Weinhuber /* device may report different configuration data after LCU setup */ 1769f4ac1d02SStefan Weinhuber rc = dasd_eckd_read_conf(device); 177040545573SHorst Hummel if (rc) 17718e09f215SStefan Weinhuber goto out_err3; 17728e09f215SStefan Weinhuber 17738e09f215SStefan Weinhuber /* Read Feature Codes */ 177468d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 177540545573SHorst Hummel 17761da177e4SLinus Torvalds /* Read Device Characteristics */ 177768b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 177868b781feSStefan Haberland &private->rdc_data, 64); 17798e09f215SStefan Weinhuber if (rc) { 1780b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1781b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 17828e09f215SStefan Weinhuber goto out_err3; 17838e09f215SStefan Weinhuber } 178434cd551aSStefan Haberland 178534cd551aSStefan Haberland if ((device->features & DASD_FEATURE_USERAW) && 178634cd551aSStefan Haberland !(private->rdc_data.facilities.RT_in_LR)) { 178734cd551aSStefan Haberland dev_err(&device->cdev->dev, "The storage server does not " 178834cd551aSStefan Haberland "support raw-track access\n"); 178934cd551aSStefan Haberland rc = -EINVAL; 179034cd551aSStefan Haberland goto out_err3; 179134cd551aSStefan Haberland } 179234cd551aSStefan Haberland 1793817f2c84SNikanth Karthikesan /* find the valid cylinder size */ 1794b44b0ab3SStefan Weinhuber if (private->rdc_data.no_cyl == LV_COMPAT_CYL && 1795b44b0ab3SStefan Weinhuber private->rdc_data.long_no_cyl) 1796b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.long_no_cyl; 1797b44b0ab3SStefan Weinhuber else 1798b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.no_cyl; 1799b44b0ab3SStefan Weinhuber 1800ef19298bSStefan Weinhuber private->fcx_max_data = get_fcx_max_data(device); 1801ef19298bSStefan Weinhuber 180233b62a30SStefan Weinhuber readonly = dasd_device_is_ro(device); 180333b62a30SStefan Weinhuber if (readonly) 180433b62a30SStefan Weinhuber set_bit(DASD_FLAG_DEVICE_RO, &device->flags); 180533b62a30SStefan Weinhuber 1806fc19f381SStefan Haberland dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " 180733b62a30SStefan Weinhuber "with %d cylinders, %d heads, %d sectors%s\n", 18081da177e4SLinus Torvalds private->rdc_data.dev_type, 18091da177e4SLinus Torvalds private->rdc_data.dev_model, 18101da177e4SLinus Torvalds private->rdc_data.cu_type, 18111da177e4SLinus Torvalds private->rdc_data.cu_model.model, 1812b44b0ab3SStefan Weinhuber private->real_cyl, 18131da177e4SLinus Torvalds private->rdc_data.trk_per_cyl, 181433b62a30SStefan Weinhuber private->rdc_data.sec_per_trk, 181533b62a30SStefan Weinhuber readonly ? ", read-only device" : ""); 18168e09f215SStefan Weinhuber return 0; 18178e09f215SStefan Weinhuber 18188e09f215SStefan Weinhuber out_err3: 18198e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 18208e09f215SStefan Weinhuber out_err2: 18218e09f215SStefan Weinhuber dasd_free_block(device->block); 18228e09f215SStefan Weinhuber device->block = NULL; 18238e09f215SStefan Weinhuber out_err1: 18244abb08c2SStefan Weinhuber kfree(private->conf_data); 18258e09f215SStefan Weinhuber kfree(device->private); 18268e09f215SStefan Weinhuber device->private = NULL; 18273d052595SHorst Hummel return rc; 18281da177e4SLinus Torvalds } 18291da177e4SLinus Torvalds 18308e09f215SStefan Weinhuber static void dasd_eckd_uncheck_device(struct dasd_device *device) 18318e09f215SStefan Weinhuber { 1832543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1833b179b037SStefan Haberland int i; 18344abb08c2SStefan Weinhuber 18358e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 18364abb08c2SStefan Weinhuber private->ned = NULL; 18374abb08c2SStefan Weinhuber private->sneq = NULL; 18384abb08c2SStefan Weinhuber private->vdsneq = NULL; 18394abb08c2SStefan Weinhuber private->gneq = NULL; 18404abb08c2SStefan Weinhuber private->conf_len = 0; 1841b179b037SStefan Haberland for (i = 0; i < 8; i++) { 1842b179b037SStefan Haberland kfree(private->path_conf_data[i]); 1843b179b037SStefan Haberland if ((__u8 *)private->path_conf_data[i] == 1844b179b037SStefan Haberland private->conf_data) { 1845b179b037SStefan Haberland private->conf_data = NULL; 1846b179b037SStefan Haberland private->conf_len = 0; 1847b179b037SStefan Haberland } 1848b179b037SStefan Haberland private->path_conf_data[i] = NULL; 1849b179b037SStefan Haberland } 18504abb08c2SStefan Weinhuber kfree(private->conf_data); 18514abb08c2SStefan Weinhuber private->conf_data = NULL; 18528e09f215SStefan Weinhuber } 18538e09f215SStefan Weinhuber 18541da177e4SLinus Torvalds static struct dasd_ccw_req * 18551da177e4SLinus Torvalds dasd_eckd_analysis_ccw(struct dasd_device *device) 18561da177e4SLinus Torvalds { 1857543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 18581da177e4SLinus Torvalds struct eckd_count *count_data; 18591da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 18601da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 18611da177e4SLinus Torvalds struct ccw1 *ccw; 18621da177e4SLinus Torvalds int cplength, datasize; 18631da177e4SLinus Torvalds int i; 18641da177e4SLinus Torvalds 18651da177e4SLinus Torvalds cplength = 8; 18661da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 186768b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 18681da177e4SLinus Torvalds if (IS_ERR(cqr)) 18691da177e4SLinus Torvalds return cqr; 18701da177e4SLinus Torvalds ccw = cqr->cpaddr; 18711da177e4SLinus Torvalds /* Define extent for the first 3 tracks. */ 18721da177e4SLinus Torvalds define_extent(ccw++, cqr->data, 0, 2, 18731da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device); 18741da177e4SLinus Torvalds LO_data = cqr->data + sizeof(struct DE_eckd_data); 18751da177e4SLinus Torvalds /* Locate record for the first 4 records on track 0. */ 18761da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18771da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 0, 0, 4, 18781da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 18791da177e4SLinus Torvalds 18801da177e4SLinus Torvalds count_data = private->count_area; 18811da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 18821da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18831da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 18841da177e4SLinus Torvalds ccw->flags = 0; 18851da177e4SLinus Torvalds ccw->count = 8; 18861da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 18871da177e4SLinus Torvalds ccw++; 18881da177e4SLinus Torvalds count_data++; 18891da177e4SLinus Torvalds } 18901da177e4SLinus Torvalds 18911da177e4SLinus Torvalds /* Locate record for the first record on track 2. */ 18921da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18931da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 2, 0, 1, 18941da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 18951da177e4SLinus Torvalds /* Read count ccw. */ 18961da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18971da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 18981da177e4SLinus Torvalds ccw->flags = 0; 18991da177e4SLinus Torvalds ccw->count = 8; 19001da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 19011da177e4SLinus Torvalds 19028e09f215SStefan Weinhuber cqr->block = NULL; 19038e09f215SStefan Weinhuber cqr->startdev = device; 19048e09f215SStefan Weinhuber cqr->memdev = device; 1905eb6e199bSStefan Weinhuber cqr->retries = 255; 19061aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 19071da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 19081da177e4SLinus Torvalds return cqr; 19091da177e4SLinus Torvalds } 19101da177e4SLinus Torvalds 1911eb6e199bSStefan Weinhuber /* differentiate between 'no record found' and any other error */ 1912eb6e199bSStefan Weinhuber static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) 1913eb6e199bSStefan Weinhuber { 1914eb6e199bSStefan Weinhuber char *sense; 1915eb6e199bSStefan Weinhuber if (init_cqr->status == DASD_CQR_DONE) 1916eb6e199bSStefan Weinhuber return INIT_CQR_OK; 1917eb6e199bSStefan Weinhuber else if (init_cqr->status == DASD_CQR_NEED_ERP || 1918eb6e199bSStefan Weinhuber init_cqr->status == DASD_CQR_FAILED) { 1919eb6e199bSStefan Weinhuber sense = dasd_get_sense(&init_cqr->irb); 1920eb6e199bSStefan Weinhuber if (sense && (sense[1] & SNS1_NO_REC_FOUND)) 1921eb6e199bSStefan Weinhuber return INIT_CQR_UNFORMATTED; 1922eb6e199bSStefan Weinhuber else 1923eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 1924eb6e199bSStefan Weinhuber } else 1925eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 1926eb6e199bSStefan Weinhuber } 1927eb6e199bSStefan Weinhuber 19281da177e4SLinus Torvalds /* 19291da177e4SLinus Torvalds * This is the callback function for the init_analysis cqr. It saves 19301da177e4SLinus Torvalds * the status of the initial analysis ccw before it frees it and kicks 19311da177e4SLinus Torvalds * the device to continue the startup sequence. This will call 19321da177e4SLinus Torvalds * dasd_eckd_do_analysis again (if the devices has not been marked 19331da177e4SLinus Torvalds * for deletion in the meantime). 19341da177e4SLinus Torvalds */ 1935eb6e199bSStefan Weinhuber static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, 1936eb6e199bSStefan Weinhuber void *data) 19371da177e4SLinus Torvalds { 1938543691a4SSebastian Ott struct dasd_device *device = init_cqr->startdev; 1939543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 19401da177e4SLinus Torvalds 1941eb6e199bSStefan Weinhuber private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); 19421da177e4SLinus Torvalds dasd_sfree_request(init_cqr, device); 19431da177e4SLinus Torvalds dasd_kick_device(device); 19441da177e4SLinus Torvalds } 19451da177e4SLinus Torvalds 1946eb6e199bSStefan Weinhuber static int dasd_eckd_start_analysis(struct dasd_block *block) 19471da177e4SLinus Torvalds { 19481da177e4SLinus Torvalds struct dasd_ccw_req *init_cqr; 19491da177e4SLinus Torvalds 19508e09f215SStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(block->base); 19511da177e4SLinus Torvalds if (IS_ERR(init_cqr)) 19521da177e4SLinus Torvalds return PTR_ERR(init_cqr); 19531da177e4SLinus Torvalds init_cqr->callback = dasd_eckd_analysis_callback; 19541da177e4SLinus Torvalds init_cqr->callback_data = NULL; 19551da177e4SLinus Torvalds init_cqr->expires = 5*HZ; 1956eb6e199bSStefan Weinhuber /* first try without ERP, so we can later handle unformatted 1957eb6e199bSStefan Weinhuber * devices as special case 1958eb6e199bSStefan Weinhuber */ 1959eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); 1960eb6e199bSStefan Weinhuber init_cqr->retries = 0; 19611da177e4SLinus Torvalds dasd_add_request_head(init_cqr); 19621da177e4SLinus Torvalds return -EAGAIN; 19631da177e4SLinus Torvalds } 19641da177e4SLinus Torvalds 1965eb6e199bSStefan Weinhuber static int dasd_eckd_end_analysis(struct dasd_block *block) 19661da177e4SLinus Torvalds { 1967543691a4SSebastian Ott struct dasd_device *device = block->base; 1968543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 19691da177e4SLinus Torvalds struct eckd_count *count_area; 19701da177e4SLinus Torvalds unsigned int sb, blk_per_trk; 19711da177e4SLinus Torvalds int status, i; 1972eb6e199bSStefan Weinhuber struct dasd_ccw_req *init_cqr; 19731da177e4SLinus Torvalds 19741da177e4SLinus Torvalds status = private->init_cqr_status; 19751da177e4SLinus Torvalds private->init_cqr_status = -1; 1976eb6e199bSStefan Weinhuber if (status == INIT_CQR_ERROR) { 1977eb6e199bSStefan Weinhuber /* try again, this time with full ERP */ 1978eb6e199bSStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(device); 1979eb6e199bSStefan Weinhuber dasd_sleep_on(init_cqr); 1980eb6e199bSStefan Weinhuber status = dasd_eckd_analysis_evaluation(init_cqr); 1981eb6e199bSStefan Weinhuber dasd_sfree_request(init_cqr, device); 1982eb6e199bSStefan Weinhuber } 1983eb6e199bSStefan Weinhuber 1984e4dbb0f2SStefan Haberland if (device->features & DASD_FEATURE_USERAW) { 1985e4dbb0f2SStefan Haberland block->bp_block = DASD_RAW_BLOCKSIZE; 1986e4dbb0f2SStefan Haberland blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; 1987e4dbb0f2SStefan Haberland block->s2b_shift = 3; 1988e4dbb0f2SStefan Haberland goto raw; 1989e4dbb0f2SStefan Haberland } 1990e4dbb0f2SStefan Haberland 1991eb6e199bSStefan Weinhuber if (status == INIT_CQR_UNFORMATTED) { 1992eb6e199bSStefan Weinhuber dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); 19931da177e4SLinus Torvalds return -EMEDIUMTYPE; 1994eb6e199bSStefan Weinhuber } else if (status == INIT_CQR_ERROR) { 1995eb6e199bSStefan Weinhuber dev_err(&device->cdev->dev, 1996eb6e199bSStefan Weinhuber "Detecting the DASD disk layout failed because " 1997eb6e199bSStefan Weinhuber "of an I/O error\n"); 1998eb6e199bSStefan Weinhuber return -EIO; 19991da177e4SLinus Torvalds } 20001da177e4SLinus Torvalds 20011da177e4SLinus Torvalds private->uses_cdl = 1; 20021da177e4SLinus Torvalds /* Check Track 0 for Compatible Disk Layout */ 20031da177e4SLinus Torvalds count_area = NULL; 20041da177e4SLinus Torvalds for (i = 0; i < 3; i++) { 20051da177e4SLinus Torvalds if (private->count_area[i].kl != 4 || 20063bc9fef9SStefan Haberland private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 || 20073bc9fef9SStefan Haberland private->count_area[i].cyl != 0 || 20083bc9fef9SStefan Haberland private->count_area[i].head != count_area_head[i] || 20093bc9fef9SStefan Haberland private->count_area[i].record != count_area_rec[i]) { 20101da177e4SLinus Torvalds private->uses_cdl = 0; 20111da177e4SLinus Torvalds break; 20121da177e4SLinus Torvalds } 20131da177e4SLinus Torvalds } 20141da177e4SLinus Torvalds if (i == 3) 20151da177e4SLinus Torvalds count_area = &private->count_area[4]; 20161da177e4SLinus Torvalds 20171da177e4SLinus Torvalds if (private->uses_cdl == 0) { 20181da177e4SLinus Torvalds for (i = 0; i < 5; i++) { 20191da177e4SLinus Torvalds if ((private->count_area[i].kl != 0) || 20201da177e4SLinus Torvalds (private->count_area[i].dl != 20213bc9fef9SStefan Haberland private->count_area[0].dl) || 20223bc9fef9SStefan Haberland private->count_area[i].cyl != 0 || 20233bc9fef9SStefan Haberland private->count_area[i].head != count_area_head[i] || 20243bc9fef9SStefan Haberland private->count_area[i].record != count_area_rec[i]) 20251da177e4SLinus Torvalds break; 20261da177e4SLinus Torvalds } 20271da177e4SLinus Torvalds if (i == 5) 20281da177e4SLinus Torvalds count_area = &private->count_area[0]; 20291da177e4SLinus Torvalds } else { 20301da177e4SLinus Torvalds if (private->count_area[3].record == 1) 2031fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 2032fc19f381SStefan Haberland "Track 0 has no records following the VTOC\n"); 20331da177e4SLinus Torvalds } 2034e4dbb0f2SStefan Haberland 20351da177e4SLinus Torvalds if (count_area != NULL && count_area->kl == 0) { 20361da177e4SLinus Torvalds /* we found notthing violating our disk layout */ 20371da177e4SLinus Torvalds if (dasd_check_blocksize(count_area->dl) == 0) 20388e09f215SStefan Weinhuber block->bp_block = count_area->dl; 20391da177e4SLinus Torvalds } 20408e09f215SStefan Weinhuber if (block->bp_block == 0) { 2041fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 2042fc19f381SStefan Haberland "The disk layout of the DASD is not supported\n"); 20431da177e4SLinus Torvalds return -EMEDIUMTYPE; 20441da177e4SLinus Torvalds } 20458e09f215SStefan Weinhuber block->s2b_shift = 0; /* bits to shift 512 to get a block */ 20468e09f215SStefan Weinhuber for (sb = 512; sb < block->bp_block; sb = sb << 1) 20478e09f215SStefan Weinhuber block->s2b_shift++; 20481da177e4SLinus Torvalds 20498e09f215SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 2050e4dbb0f2SStefan Haberland 2051e4dbb0f2SStefan Haberland raw: 2052b44b0ab3SStefan Weinhuber block->blocks = (private->real_cyl * 20531da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 20541da177e4SLinus Torvalds blk_per_trk); 20551da177e4SLinus Torvalds 2056fc19f381SStefan Haberland dev_info(&device->cdev->dev, 2057fc19f381SStefan Haberland "DASD with %d KB/block, %d KB total size, %d KB/track, " 2058fc19f381SStefan Haberland "%s\n", (block->bp_block >> 10), 2059b44b0ab3SStefan Weinhuber ((private->real_cyl * 20601da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 20618e09f215SStefan Weinhuber blk_per_trk * (block->bp_block >> 9)) >> 1), 20628e09f215SStefan Weinhuber ((blk_per_trk * block->bp_block) >> 10), 20631da177e4SLinus Torvalds private->uses_cdl ? 20641da177e4SLinus Torvalds "compatible disk layout" : "linux disk layout"); 20651da177e4SLinus Torvalds 20661da177e4SLinus Torvalds return 0; 20671da177e4SLinus Torvalds } 20681da177e4SLinus Torvalds 20698e09f215SStefan Weinhuber static int dasd_eckd_do_analysis(struct dasd_block *block) 20701da177e4SLinus Torvalds { 2071543691a4SSebastian Ott struct dasd_eckd_private *private = block->base->private; 20721da177e4SLinus Torvalds 20731da177e4SLinus Torvalds if (private->init_cqr_status < 0) 20748e09f215SStefan Weinhuber return dasd_eckd_start_analysis(block); 20751da177e4SLinus Torvalds else 20768e09f215SStefan Weinhuber return dasd_eckd_end_analysis(block); 20771da177e4SLinus Torvalds } 20781da177e4SLinus Torvalds 2079d42e1712SStefan Haberland static int dasd_eckd_basic_to_ready(struct dasd_device *device) 20808e09f215SStefan Weinhuber { 20818e09f215SStefan Weinhuber return dasd_alias_add_device(device); 20828e09f215SStefan Weinhuber }; 20838e09f215SStefan Weinhuber 20848e09f215SStefan Weinhuber static int dasd_eckd_online_to_ready(struct dasd_device *device) 20858e09f215SStefan Weinhuber { 2086501183f2SStefan Haberland cancel_work_sync(&device->reload_device); 208725e2cf1cSStefan Haberland cancel_work_sync(&device->kick_validate); 2088d42e1712SStefan Haberland return 0; 2089d42e1712SStefan Haberland }; 2090d42e1712SStefan Haberland 2091daa991bfSStefan Haberland static int dasd_eckd_basic_to_known(struct dasd_device *device) 2092d42e1712SStefan Haberland { 20938e09f215SStefan Weinhuber return dasd_alias_remove_device(device); 20948e09f215SStefan Weinhuber }; 20958e09f215SStefan Weinhuber 20961da177e4SLinus Torvalds static int 20978e09f215SStefan Weinhuber dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 20981da177e4SLinus Torvalds { 2099543691a4SSebastian Ott struct dasd_eckd_private *private = block->base->private; 21001da177e4SLinus Torvalds 21018e09f215SStefan Weinhuber if (dasd_check_blocksize(block->bp_block) == 0) { 21021da177e4SLinus Torvalds geo->sectors = recs_per_track(&private->rdc_data, 21038e09f215SStefan Weinhuber 0, block->bp_block); 21041da177e4SLinus Torvalds } 21051da177e4SLinus Torvalds geo->cylinders = private->rdc_data.no_cyl; 21061da177e4SLinus Torvalds geo->heads = private->rdc_data.trk_per_cyl; 21071da177e4SLinus Torvalds return 0; 21081da177e4SLinus Torvalds } 21091da177e4SLinus Torvalds 21108fd57520SJan Höppner /* 21118fd57520SJan Höppner * Build the TCW request for the format check 21128fd57520SJan Höppner */ 21138fd57520SJan Höppner static struct dasd_ccw_req * 21148fd57520SJan Höppner dasd_eckd_build_check_tcw(struct dasd_device *base, struct format_data_t *fdata, 21158fd57520SJan Höppner int enable_pav, struct eckd_count *fmt_buffer, 21168fd57520SJan Höppner int rpt) 21178fd57520SJan Höppner { 21188fd57520SJan Höppner struct dasd_eckd_private *start_priv; 21198fd57520SJan Höppner struct dasd_device *startdev = NULL; 21208fd57520SJan Höppner struct tidaw *last_tidaw = NULL; 21218fd57520SJan Höppner struct dasd_ccw_req *cqr; 21228fd57520SJan Höppner struct itcw *itcw; 21238fd57520SJan Höppner int itcw_size; 21248fd57520SJan Höppner int count; 21258fd57520SJan Höppner int rc; 21268fd57520SJan Höppner int i; 21278fd57520SJan Höppner 21288fd57520SJan Höppner if (enable_pav) 21298fd57520SJan Höppner startdev = dasd_alias_get_start_dev(base); 21308fd57520SJan Höppner 21318fd57520SJan Höppner if (!startdev) 21328fd57520SJan Höppner startdev = base; 21338fd57520SJan Höppner 21348fd57520SJan Höppner start_priv = startdev->private; 21358fd57520SJan Höppner 21368fd57520SJan Höppner count = rpt * (fdata->stop_unit - fdata->start_unit + 1); 21378fd57520SJan Höppner 21388fd57520SJan Höppner /* 21398fd57520SJan Höppner * we're adding 'count' amount of tidaw to the itcw. 21408fd57520SJan Höppner * calculate the corresponding itcw_size 21418fd57520SJan Höppner */ 21428fd57520SJan Höppner itcw_size = itcw_calc_size(0, count, 0); 21438fd57520SJan Höppner 21448fd57520SJan Höppner cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 21458fd57520SJan Höppner if (IS_ERR(cqr)) 21468fd57520SJan Höppner return cqr; 21478fd57520SJan Höppner 21488fd57520SJan Höppner start_priv->count++; 21498fd57520SJan Höppner 21508fd57520SJan Höppner itcw = itcw_init(cqr->data, itcw_size, ITCW_OP_READ, 0, count, 0); 21518fd57520SJan Höppner if (IS_ERR(itcw)) { 21528fd57520SJan Höppner rc = -EINVAL; 21538fd57520SJan Höppner goto out_err; 21548fd57520SJan Höppner } 21558fd57520SJan Höppner 21568fd57520SJan Höppner cqr->cpaddr = itcw_get_tcw(itcw); 21578fd57520SJan Höppner rc = prepare_itcw(itcw, fdata->start_unit, fdata->stop_unit, 21588fd57520SJan Höppner DASD_ECKD_CCW_READ_COUNT_MT, base, startdev, 0, count, 21598fd57520SJan Höppner sizeof(struct eckd_count), 21608fd57520SJan Höppner count * sizeof(struct eckd_count), 0, rpt); 21618fd57520SJan Höppner if (rc) 21628fd57520SJan Höppner goto out_err; 21638fd57520SJan Höppner 21648fd57520SJan Höppner for (i = 0; i < count; i++) { 21658fd57520SJan Höppner last_tidaw = itcw_add_tidaw(itcw, 0, fmt_buffer++, 21668fd57520SJan Höppner sizeof(struct eckd_count)); 21678fd57520SJan Höppner if (IS_ERR(last_tidaw)) { 21688fd57520SJan Höppner rc = -EINVAL; 21698fd57520SJan Höppner goto out_err; 21708fd57520SJan Höppner } 21718fd57520SJan Höppner } 21728fd57520SJan Höppner 21738fd57520SJan Höppner last_tidaw->flags |= TIDAW_FLAGS_LAST; 21748fd57520SJan Höppner itcw_finalize(itcw); 21758fd57520SJan Höppner 21768fd57520SJan Höppner cqr->cpmode = 1; 21778fd57520SJan Höppner cqr->startdev = startdev; 21788fd57520SJan Höppner cqr->memdev = startdev; 21798fd57520SJan Höppner cqr->basedev = base; 21808fd57520SJan Höppner cqr->retries = startdev->default_retries; 21818fd57520SJan Höppner cqr->expires = startdev->default_expires * HZ; 21828fd57520SJan Höppner cqr->buildclk = get_tod_clock(); 21838fd57520SJan Höppner cqr->status = DASD_CQR_FILLED; 21848fd57520SJan Höppner /* Set flags to suppress output for expected errors */ 21858fd57520SJan Höppner set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); 21868fd57520SJan Höppner set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); 21878fd57520SJan Höppner 21888fd57520SJan Höppner return cqr; 21898fd57520SJan Höppner 21908fd57520SJan Höppner out_err: 21918fd57520SJan Höppner dasd_sfree_request(cqr, startdev); 21928fd57520SJan Höppner 21938fd57520SJan Höppner return ERR_PTR(rc); 21948fd57520SJan Höppner } 21958fd57520SJan Höppner 21968fd57520SJan Höppner /* 21978fd57520SJan Höppner * Build the CCW request for the format check 21988fd57520SJan Höppner */ 21998fd57520SJan Höppner static struct dasd_ccw_req * 22008fd57520SJan Höppner dasd_eckd_build_check(struct dasd_device *base, struct format_data_t *fdata, 22018fd57520SJan Höppner int enable_pav, struct eckd_count *fmt_buffer, int rpt) 22028fd57520SJan Höppner { 22038fd57520SJan Höppner struct dasd_eckd_private *start_priv; 22048fd57520SJan Höppner struct dasd_eckd_private *base_priv; 22058fd57520SJan Höppner struct dasd_device *startdev = NULL; 22068fd57520SJan Höppner struct dasd_ccw_req *cqr; 22078fd57520SJan Höppner struct ccw1 *ccw; 22088fd57520SJan Höppner void *data; 22098fd57520SJan Höppner int cplength, datasize; 22108fd57520SJan Höppner int use_prefix; 22118fd57520SJan Höppner int count; 22128fd57520SJan Höppner int i; 22138fd57520SJan Höppner 22148fd57520SJan Höppner if (enable_pav) 22158fd57520SJan Höppner startdev = dasd_alias_get_start_dev(base); 22168fd57520SJan Höppner 22178fd57520SJan Höppner if (!startdev) 22188fd57520SJan Höppner startdev = base; 22198fd57520SJan Höppner 22208fd57520SJan Höppner start_priv = startdev->private; 22218fd57520SJan Höppner base_priv = base->private; 22228fd57520SJan Höppner 22238fd57520SJan Höppner count = rpt * (fdata->stop_unit - fdata->start_unit + 1); 22248fd57520SJan Höppner 22258fd57520SJan Höppner use_prefix = base_priv->features.feature[8] & 0x01; 22268fd57520SJan Höppner 22278fd57520SJan Höppner if (use_prefix) { 22288fd57520SJan Höppner cplength = 1; 22298fd57520SJan Höppner datasize = sizeof(struct PFX_eckd_data); 22308fd57520SJan Höppner } else { 22318fd57520SJan Höppner cplength = 2; 22328fd57520SJan Höppner datasize = sizeof(struct DE_eckd_data) + 22338fd57520SJan Höppner sizeof(struct LO_eckd_data); 22348fd57520SJan Höppner } 22358fd57520SJan Höppner cplength += count; 22368fd57520SJan Höppner 22378fd57520SJan Höppner cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 22388fd57520SJan Höppner startdev); 22398fd57520SJan Höppner if (IS_ERR(cqr)) 22408fd57520SJan Höppner return cqr; 22418fd57520SJan Höppner 22428fd57520SJan Höppner start_priv->count++; 22438fd57520SJan Höppner data = cqr->data; 22448fd57520SJan Höppner ccw = cqr->cpaddr; 22458fd57520SJan Höppner 22468fd57520SJan Höppner if (use_prefix) { 22478fd57520SJan Höppner prefix_LRE(ccw++, data, fdata->start_unit, fdata->stop_unit, 22488fd57520SJan Höppner DASD_ECKD_CCW_READ_COUNT, base, startdev, 1, 0, 22498fd57520SJan Höppner count, 0, 0); 22508fd57520SJan Höppner } else { 22518fd57520SJan Höppner define_extent(ccw++, data, fdata->start_unit, fdata->stop_unit, 22528fd57520SJan Höppner DASD_ECKD_CCW_READ_COUNT, startdev); 22538fd57520SJan Höppner 22548fd57520SJan Höppner data += sizeof(struct DE_eckd_data); 22558fd57520SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 22568fd57520SJan Höppner 22578fd57520SJan Höppner locate_record(ccw++, data, fdata->start_unit, 0, count, 22588fd57520SJan Höppner DASD_ECKD_CCW_READ_COUNT, base, 0); 22598fd57520SJan Höppner } 22608fd57520SJan Höppner 22618fd57520SJan Höppner for (i = 0; i < count; i++) { 22628fd57520SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 22638fd57520SJan Höppner ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 22648fd57520SJan Höppner ccw->flags = CCW_FLAG_SLI; 22658fd57520SJan Höppner ccw->count = 8; 22668fd57520SJan Höppner ccw->cda = (__u32)(addr_t) fmt_buffer; 22678fd57520SJan Höppner ccw++; 22688fd57520SJan Höppner fmt_buffer++; 22698fd57520SJan Höppner } 22708fd57520SJan Höppner 22718fd57520SJan Höppner cqr->startdev = startdev; 22728fd57520SJan Höppner cqr->memdev = startdev; 22738fd57520SJan Höppner cqr->basedev = base; 22748fd57520SJan Höppner cqr->retries = DASD_RETRIES; 22758fd57520SJan Höppner cqr->expires = startdev->default_expires * HZ; 22768fd57520SJan Höppner cqr->buildclk = get_tod_clock(); 22778fd57520SJan Höppner cqr->status = DASD_CQR_FILLED; 22788fd57520SJan Höppner /* Set flags to suppress output for expected errors */ 22798fd57520SJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 22808fd57520SJan Höppner 22818fd57520SJan Höppner return cqr; 22828fd57520SJan Höppner } 22838fd57520SJan Höppner 22841da177e4SLinus Torvalds static struct dasd_ccw_req * 2285d42e1712SStefan Haberland dasd_eckd_build_format(struct dasd_device *base, 228629b8dd9dSStefan Haberland struct format_data_t *fdata, 2287a94fa154SStefan Haberland int enable_pav) 22881da177e4SLinus Torvalds { 2289d42e1712SStefan Haberland struct dasd_eckd_private *base_priv; 2290d42e1712SStefan Haberland struct dasd_eckd_private *start_priv; 229129b8dd9dSStefan Haberland struct dasd_device *startdev = NULL; 22921da177e4SLinus Torvalds struct dasd_ccw_req *fcp; 22931da177e4SLinus Torvalds struct eckd_count *ect; 2294d42e1712SStefan Haberland struct ch_t address; 22951da177e4SLinus Torvalds struct ccw1 *ccw; 22961da177e4SLinus Torvalds void *data; 2297b44b0ab3SStefan Weinhuber int rpt; 22981da177e4SLinus Torvalds int cplength, datasize; 2299d42e1712SStefan Haberland int i, j; 2300f9a28f7bSJean-Baptiste Joret int intensity = 0; 2301f9a28f7bSJean-Baptiste Joret int r0_perm; 2302d42e1712SStefan Haberland int nr_tracks; 230318d6624eSStefan Haberland int use_prefix; 23041da177e4SLinus Torvalds 2305a94fa154SStefan Haberland if (enable_pav) 2306d42e1712SStefan Haberland startdev = dasd_alias_get_start_dev(base); 230729b8dd9dSStefan Haberland 2308d42e1712SStefan Haberland if (!startdev) 2309d42e1712SStefan Haberland startdev = base; 23101da177e4SLinus Torvalds 2311543691a4SSebastian Ott start_priv = startdev->private; 2312543691a4SSebastian Ott base_priv = base->private; 2313d42e1712SStefan Haberland 2314d42e1712SStefan Haberland rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize); 2315d42e1712SStefan Haberland 2316d42e1712SStefan Haberland nr_tracks = fdata->stop_unit - fdata->start_unit + 1; 23171da177e4SLinus Torvalds 23181da177e4SLinus Torvalds /* 23191da177e4SLinus Torvalds * fdata->intensity is a bit string that tells us what to do: 23201da177e4SLinus Torvalds * Bit 0: write record zero 23211da177e4SLinus Torvalds * Bit 1: write home address, currently not supported 23221da177e4SLinus Torvalds * Bit 2: invalidate tracks 23231da177e4SLinus Torvalds * Bit 3: use OS/390 compatible disk layout (cdl) 2324f9a28f7bSJean-Baptiste Joret * Bit 4: do not allow storage subsystem to modify record zero 23251da177e4SLinus Torvalds * Only some bit combinations do make sense. 23261da177e4SLinus Torvalds */ 2327f9a28f7bSJean-Baptiste Joret if (fdata->intensity & 0x10) { 2328f9a28f7bSJean-Baptiste Joret r0_perm = 0; 2329f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity & ~0x10; 2330f9a28f7bSJean-Baptiste Joret } else { 2331f9a28f7bSJean-Baptiste Joret r0_perm = 1; 2332f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity; 2333f9a28f7bSJean-Baptiste Joret } 2334d42e1712SStefan Haberland 233518d6624eSStefan Haberland use_prefix = base_priv->features.feature[8] & 0x01; 233618d6624eSStefan Haberland 2337f9a28f7bSJean-Baptiste Joret switch (intensity) { 23381da177e4SLinus Torvalds case 0x00: /* Normal format */ 23391da177e4SLinus Torvalds case 0x08: /* Normal format, use cdl. */ 2340d42e1712SStefan Haberland cplength = 2 + (rpt*nr_tracks); 234118d6624eSStefan Haberland if (use_prefix) 2342d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 23431da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 2344d42e1712SStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 234518d6624eSStefan Haberland else 234618d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 234718d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 234818d6624eSStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 23491da177e4SLinus Torvalds break; 23501da177e4SLinus Torvalds case 0x01: /* Write record zero and format track. */ 23511da177e4SLinus Torvalds case 0x09: /* Write record zero and format track, use cdl. */ 2352d42e1712SStefan Haberland cplength = 2 + rpt * nr_tracks; 235318d6624eSStefan Haberland if (use_prefix) 2354d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 23551da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 23561da177e4SLinus Torvalds sizeof(struct eckd_count) + 2357d42e1712SStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 235818d6624eSStefan Haberland else 235918d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 236018d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 236118d6624eSStefan Haberland sizeof(struct eckd_count) + 236218d6624eSStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 23631da177e4SLinus Torvalds break; 23641da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 23651da177e4SLinus Torvalds case 0x0c: /* Invalidate track, use cdl. */ 23661da177e4SLinus Torvalds cplength = 3; 236718d6624eSStefan Haberland if (use_prefix) 2368d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 23691da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 23701da177e4SLinus Torvalds sizeof(struct eckd_count); 237118d6624eSStefan Haberland else 237218d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 237318d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 237418d6624eSStefan Haberland sizeof(struct eckd_count); 23751da177e4SLinus Torvalds break; 23761da177e4SLinus Torvalds default: 2377d42e1712SStefan Haberland dev_warn(&startdev->cdev->dev, 2378d42e1712SStefan Haberland "An I/O control call used incorrect flags 0x%x\n", 2379d42e1712SStefan Haberland fdata->intensity); 23801da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 23811da177e4SLinus Torvalds } 23821da177e4SLinus Torvalds /* Allocate the format ccw request. */ 2383d42e1712SStefan Haberland fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 2384d42e1712SStefan Haberland datasize, startdev); 23851da177e4SLinus Torvalds if (IS_ERR(fcp)) 23861da177e4SLinus Torvalds return fcp; 23871da177e4SLinus Torvalds 2388d42e1712SStefan Haberland start_priv->count++; 23891da177e4SLinus Torvalds data = fcp->data; 23901da177e4SLinus Torvalds ccw = fcp->cpaddr; 23911da177e4SLinus Torvalds 2392f9a28f7bSJean-Baptiste Joret switch (intensity & ~0x08) { 23931da177e4SLinus Torvalds case 0x00: /* Normal format. */ 239418d6624eSStefan Haberland if (use_prefix) { 2395d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2396d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 2397d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2398f9a28f7bSJean-Baptiste Joret /* grant subsystem permission to format R0 */ 2399f9a28f7bSJean-Baptiste Joret if (r0_perm) 2400d42e1712SStefan Haberland ((struct PFX_eckd_data *)data) 2401d42e1712SStefan Haberland ->define_extent.ga_extended |= 0x04; 2402d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 240318d6624eSStefan Haberland } else { 240418d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 240518d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 240618d6624eSStefan Haberland DASD_ECKD_CCW_WRITE_CKD, startdev); 240718d6624eSStefan Haberland /* grant subsystem permission to format R0 */ 240818d6624eSStefan Haberland if (r0_perm) 240918d6624eSStefan Haberland ((struct DE_eckd_data *) data) 241018d6624eSStefan Haberland ->ga_extended |= 0x04; 241118d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 241218d6624eSStefan Haberland } 24131da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 24141da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 2415d42e1712SStefan Haberland fdata->start_unit, 0, rpt*nr_tracks, 2416d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, 24171da177e4SLinus Torvalds fdata->blksize); 24181da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 24191da177e4SLinus Torvalds break; 24201da177e4SLinus Torvalds case 0x01: /* Write record zero + format track. */ 242118d6624eSStefan Haberland if (use_prefix) { 2422d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2423d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 24241da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, 2425d42e1712SStefan Haberland base, startdev); 2426d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 242718d6624eSStefan Haberland } else { 242818d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 242918d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 243018d6624eSStefan Haberland DASD_ECKD_CCW_WRITE_RECORD_ZERO, startdev); 243118d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 243218d6624eSStefan Haberland } 24331da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 24341da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 2435d42e1712SStefan Haberland fdata->start_unit, 0, rpt * nr_tracks + 1, 2436d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_RECORD_ZERO, base, 2437d42e1712SStefan Haberland base->block->bp_block); 24381da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 24391da177e4SLinus Torvalds break; 24401da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 244118d6624eSStefan Haberland if (use_prefix) { 2442d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2443d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 2444d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2445d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 244618d6624eSStefan Haberland } else { 244718d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 244818d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 244918d6624eSStefan Haberland DASD_ECKD_CCW_WRITE_CKD, startdev); 245018d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 245118d6624eSStefan Haberland } 24521da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 24531da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 24541da177e4SLinus Torvalds fdata->start_unit, 0, 1, 2455d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, 8); 24561da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 24571da177e4SLinus Torvalds break; 24581da177e4SLinus Torvalds } 2459d42e1712SStefan Haberland 2460d42e1712SStefan Haberland for (j = 0; j < nr_tracks; j++) { 2461d42e1712SStefan Haberland /* calculate cylinder and head for the current track */ 2462d42e1712SStefan Haberland set_ch_t(&address, 2463d42e1712SStefan Haberland (fdata->start_unit + j) / 2464d42e1712SStefan Haberland base_priv->rdc_data.trk_per_cyl, 2465d42e1712SStefan Haberland (fdata->start_unit + j) % 2466d42e1712SStefan Haberland base_priv->rdc_data.trk_per_cyl); 2467f9a28f7bSJean-Baptiste Joret if (intensity & 0x01) { /* write record zero */ 24681da177e4SLinus Torvalds ect = (struct eckd_count *) data; 24691da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2470b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2471b44b0ab3SStefan Weinhuber ect->head = address.head; 24721da177e4SLinus Torvalds ect->record = 0; 24731da177e4SLinus Torvalds ect->kl = 0; 24741da177e4SLinus Torvalds ect->dl = 8; 24751da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 24761da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 24771da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 24781da177e4SLinus Torvalds ccw->count = 8; 24791da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 24801da177e4SLinus Torvalds ccw++; 24811da177e4SLinus Torvalds } 2482f9a28f7bSJean-Baptiste Joret if ((intensity & ~0x08) & 0x04) { /* erase track */ 24831da177e4SLinus Torvalds ect = (struct eckd_count *) data; 24841da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2485b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2486b44b0ab3SStefan Weinhuber ect->head = address.head; 24871da177e4SLinus Torvalds ect->record = 1; 24881da177e4SLinus Torvalds ect->kl = 0; 24891da177e4SLinus Torvalds ect->dl = 0; 24901da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 24911da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 24921da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 24931da177e4SLinus Torvalds ccw->count = 8; 24941da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 24951da177e4SLinus Torvalds } else { /* write remaining records */ 24961da177e4SLinus Torvalds for (i = 0; i < rpt; i++) { 24971da177e4SLinus Torvalds ect = (struct eckd_count *) data; 24981da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2499b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2500b44b0ab3SStefan Weinhuber ect->head = address.head; 25011da177e4SLinus Torvalds ect->record = i + 1; 25021da177e4SLinus Torvalds ect->kl = 0; 25031da177e4SLinus Torvalds ect->dl = fdata->blksize; 2504d42e1712SStefan Haberland /* 2505d42e1712SStefan Haberland * Check for special tracks 0-1 2506d42e1712SStefan Haberland * when formatting CDL 2507d42e1712SStefan Haberland */ 2508f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 250946d1c03cSJan Höppner address.cyl == 0 && address.head == 0) { 25101da177e4SLinus Torvalds if (i < 3) { 25111da177e4SLinus Torvalds ect->kl = 4; 25121da177e4SLinus Torvalds ect->dl = sizes_trk0[i] - 4; 25131da177e4SLinus Torvalds } 25141da177e4SLinus Torvalds } 2515f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 251646d1c03cSJan Höppner address.cyl == 0 && address.head == 1) { 25171da177e4SLinus Torvalds ect->kl = 44; 25181da177e4SLinus Torvalds ect->dl = LABEL_SIZE - 44; 25191da177e4SLinus Torvalds } 25201da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 2521d42e1712SStefan Haberland if (i != 0 || j == 0) 2522d42e1712SStefan Haberland ccw->cmd_code = 2523d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD; 2524d42e1712SStefan Haberland else 2525d42e1712SStefan Haberland ccw->cmd_code = 2526d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD_MT; 25271da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 25281da177e4SLinus Torvalds ccw->count = 8; 25291da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 25301da177e4SLinus Torvalds ccw++; 25311da177e4SLinus Torvalds } 25321da177e4SLinus Torvalds } 2533d42e1712SStefan Haberland } 2534d42e1712SStefan Haberland 2535d42e1712SStefan Haberland fcp->startdev = startdev; 2536d42e1712SStefan Haberland fcp->memdev = startdev; 253729b8dd9dSStefan Haberland fcp->basedev = base; 2538eb6e199bSStefan Weinhuber fcp->retries = 256; 2539d42e1712SStefan Haberland fcp->expires = startdev->default_expires * HZ; 25401aae0560SHeiko Carstens fcp->buildclk = get_tod_clock(); 25411da177e4SLinus Torvalds fcp->status = DASD_CQR_FILLED; 2542d42e1712SStefan Haberland 25431da177e4SLinus Torvalds return fcp; 25441da177e4SLinus Torvalds } 25451da177e4SLinus Torvalds 2546570d237cSJan Höppner /* 2547570d237cSJan Höppner * Wrapper function to build a CCW request depending on input data 2548570d237cSJan Höppner */ 2549570d237cSJan Höppner static struct dasd_ccw_req * 2550570d237cSJan Höppner dasd_eckd_format_build_ccw_req(struct dasd_device *base, 25518fd57520SJan Höppner struct format_data_t *fdata, int enable_pav, 25528fd57520SJan Höppner int tpm, struct eckd_count *fmt_buffer, int rpt) 2553d42e1712SStefan Haberland { 25548fd57520SJan Höppner struct dasd_ccw_req *ccw_req; 25558fd57520SJan Höppner 25568fd57520SJan Höppner if (!fmt_buffer) { 25578fd57520SJan Höppner ccw_req = dasd_eckd_build_format(base, fdata, enable_pav); 25588fd57520SJan Höppner } else { 25598fd57520SJan Höppner if (tpm) 25608fd57520SJan Höppner ccw_req = dasd_eckd_build_check_tcw(base, fdata, 25618fd57520SJan Höppner enable_pav, 25628fd57520SJan Höppner fmt_buffer, rpt); 25638fd57520SJan Höppner else 25648fd57520SJan Höppner ccw_req = dasd_eckd_build_check(base, fdata, enable_pav, 25658fd57520SJan Höppner fmt_buffer, rpt); 25668fd57520SJan Höppner } 25678fd57520SJan Höppner 25688fd57520SJan Höppner return ccw_req; 2569570d237cSJan Höppner } 2570570d237cSJan Höppner 2571570d237cSJan Höppner /* 2572570d237cSJan Höppner * Sanity checks on format_data 2573570d237cSJan Höppner */ 2574570d237cSJan Höppner static int dasd_eckd_format_sanity_checks(struct dasd_device *base, 2575570d237cSJan Höppner struct format_data_t *fdata) 2576570d237cSJan Höppner { 2577543691a4SSebastian Ott struct dasd_eckd_private *private = base->private; 2578d42e1712SStefan Haberland 2579d42e1712SStefan Haberland if (fdata->start_unit >= 2580d42e1712SStefan Haberland (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2581d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2582d42e1712SStefan Haberland "Start track number %u used in formatting is too big\n", 2583d42e1712SStefan Haberland fdata->start_unit); 2584d42e1712SStefan Haberland return -EINVAL; 2585d42e1712SStefan Haberland } 2586d42e1712SStefan Haberland if (fdata->stop_unit >= 2587d42e1712SStefan Haberland (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2588d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2589d42e1712SStefan Haberland "Stop track number %u used in formatting is too big\n", 2590d42e1712SStefan Haberland fdata->stop_unit); 2591d42e1712SStefan Haberland return -EINVAL; 2592d42e1712SStefan Haberland } 2593d42e1712SStefan Haberland if (fdata->start_unit > fdata->stop_unit) { 2594d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2595d42e1712SStefan Haberland "Start track %u used in formatting exceeds end track\n", 2596d42e1712SStefan Haberland fdata->start_unit); 2597d42e1712SStefan Haberland return -EINVAL; 2598d42e1712SStefan Haberland } 2599d42e1712SStefan Haberland if (dasd_check_blocksize(fdata->blksize) != 0) { 2600d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2601d42e1712SStefan Haberland "The DASD cannot be formatted with block size %u\n", 2602d42e1712SStefan Haberland fdata->blksize); 2603d42e1712SStefan Haberland return -EINVAL; 2604d42e1712SStefan Haberland } 2605570d237cSJan Höppner return 0; 2606570d237cSJan Höppner } 2607570d237cSJan Höppner 2608570d237cSJan Höppner /* 2609570d237cSJan Höppner * This function will process format_data originally coming from an IOCTL 2610570d237cSJan Höppner */ 2611570d237cSJan Höppner static int dasd_eckd_format_process_data(struct dasd_device *base, 2612570d237cSJan Höppner struct format_data_t *fdata, 26138fd57520SJan Höppner int enable_pav, int tpm, 26148fd57520SJan Höppner struct eckd_count *fmt_buffer, int rpt, 26158fd57520SJan Höppner struct irb *irb) 2616570d237cSJan Höppner { 2617543691a4SSebastian Ott struct dasd_eckd_private *private = base->private; 2618570d237cSJan Höppner struct dasd_ccw_req *cqr, *n; 2619570d237cSJan Höppner struct list_head format_queue; 2620570d237cSJan Höppner struct dasd_device *device; 26218fd57520SJan Höppner char *sense = NULL; 2622570d237cSJan Höppner int old_start, old_stop, format_step; 2623570d237cSJan Höppner int step, retry; 2624570d237cSJan Höppner int rc; 2625570d237cSJan Höppner 2626570d237cSJan Höppner rc = dasd_eckd_format_sanity_checks(base, fdata); 2627570d237cSJan Höppner if (rc) 2628570d237cSJan Höppner return rc; 2629d42e1712SStefan Haberland 2630d42e1712SStefan Haberland INIT_LIST_HEAD(&format_queue); 2631d42e1712SStefan Haberland 263246d1c03cSJan Höppner old_start = fdata->start_unit; 263329b8dd9dSStefan Haberland old_stop = fdata->stop_unit; 2634d42e1712SStefan Haberland 26358fd57520SJan Höppner if (!tpm && fmt_buffer != NULL) { 26368fd57520SJan Höppner /* Command Mode / Format Check */ 26378fd57520SJan Höppner format_step = 1; 26388fd57520SJan Höppner } else if (tpm && fmt_buffer != NULL) { 26398fd57520SJan Höppner /* Transport Mode / Format Check */ 26408fd57520SJan Höppner format_step = DASD_CQR_MAX_CCW / rpt; 26418fd57520SJan Höppner } else { 26428fd57520SJan Höppner /* Normal Formatting */ 26438fd57520SJan Höppner format_step = DASD_CQR_MAX_CCW / 26448fd57520SJan Höppner recs_per_track(&private->rdc_data, 0, fdata->blksize); 26458fd57520SJan Höppner } 26468fd57520SJan Höppner 264746d1c03cSJan Höppner do { 264846d1c03cSJan Höppner retry = 0; 2649d42e1712SStefan Haberland while (fdata->start_unit <= old_stop) { 2650d42e1712SStefan Haberland step = fdata->stop_unit - fdata->start_unit + 1; 265146d1c03cSJan Höppner if (step > format_step) { 265246d1c03cSJan Höppner fdata->stop_unit = 265346d1c03cSJan Höppner fdata->start_unit + format_step - 1; 265446d1c03cSJan Höppner } 2655d42e1712SStefan Haberland 2656570d237cSJan Höppner cqr = dasd_eckd_format_build_ccw_req(base, fdata, 26578fd57520SJan Höppner enable_pav, tpm, 26588fd57520SJan Höppner fmt_buffer, rpt); 2659d42e1712SStefan Haberland if (IS_ERR(cqr)) { 266046d1c03cSJan Höppner rc = PTR_ERR(cqr); 266146d1c03cSJan Höppner if (rc == -ENOMEM) { 266246d1c03cSJan Höppner if (list_empty(&format_queue)) 266346d1c03cSJan Höppner goto out; 2664d42e1712SStefan Haberland /* 266546d1c03cSJan Höppner * not enough memory available, start 266646d1c03cSJan Höppner * requests retry after first requests 266746d1c03cSJan Höppner * were finished 2668d42e1712SStefan Haberland */ 266946d1c03cSJan Höppner retry = 1; 267046d1c03cSJan Höppner break; 2671d42e1712SStefan Haberland } 267246d1c03cSJan Höppner goto out_err; 267346d1c03cSJan Höppner } 267446d1c03cSJan Höppner list_add_tail(&cqr->blocklist, &format_queue); 2675d42e1712SStefan Haberland 26768fd57520SJan Höppner if (fmt_buffer) { 26778fd57520SJan Höppner step = fdata->stop_unit - fdata->start_unit + 1; 26788fd57520SJan Höppner fmt_buffer += rpt * step; 26798fd57520SJan Höppner } 2680d42e1712SStefan Haberland fdata->start_unit = fdata->stop_unit + 1; 2681d42e1712SStefan Haberland fdata->stop_unit = old_stop; 2682d42e1712SStefan Haberland } 2683d42e1712SStefan Haberland 268446d1c03cSJan Höppner rc = dasd_sleep_on_queue(&format_queue); 2685d42e1712SStefan Haberland 268646d1c03cSJan Höppner out_err: 2687d42e1712SStefan Haberland list_for_each_entry_safe(cqr, n, &format_queue, blocklist) { 2688d42e1712SStefan Haberland device = cqr->startdev; 2689543691a4SSebastian Ott private = device->private; 26908fd57520SJan Höppner 26918fd57520SJan Höppner if (cqr->status == DASD_CQR_FAILED) { 26928fd57520SJan Höppner /* 26938fd57520SJan Höppner * Only get sense data if called by format 26948fd57520SJan Höppner * check 26958fd57520SJan Höppner */ 26968fd57520SJan Höppner if (fmt_buffer && irb) { 26978fd57520SJan Höppner sense = dasd_get_sense(&cqr->irb); 26988fd57520SJan Höppner memcpy(irb, &cqr->irb, sizeof(*irb)); 26998fd57520SJan Höppner } 2700d42e1712SStefan Haberland rc = -EIO; 27018fd57520SJan Höppner } 2702d42e1712SStefan Haberland list_del_init(&cqr->blocklist); 2703d42e1712SStefan Haberland dasd_sfree_request(cqr, device); 2704d42e1712SStefan Haberland private->count--; 2705d42e1712SStefan Haberland } 2706d42e1712SStefan Haberland 27078fd57520SJan Höppner if (rc && rc != -EIO) 270846d1c03cSJan Höppner goto out; 27098fd57520SJan Höppner if (rc == -EIO) { 27108fd57520SJan Höppner /* 27118fd57520SJan Höppner * In case fewer than the expected records are on the 27128fd57520SJan Höppner * track, we will most likely get a 'No Record Found' 27138fd57520SJan Höppner * error (in command mode) or a 'File Protected' error 27148fd57520SJan Höppner * (in transport mode). Those particular cases shouldn't 27158fd57520SJan Höppner * pass the -EIO to the IOCTL, therefore reset the rc 27168fd57520SJan Höppner * and continue. 27178fd57520SJan Höppner */ 27188fd57520SJan Höppner if (sense && 27198fd57520SJan Höppner (sense[1] & SNS1_NO_REC_FOUND || 27208fd57520SJan Höppner sense[1] & SNS1_FILE_PROTECTED)) 27218fd57520SJan Höppner retry = 1; 27228fd57520SJan Höppner else 27238fd57520SJan Höppner goto out; 27248fd57520SJan Höppner } 272529b8dd9dSStefan Haberland 272646d1c03cSJan Höppner } while (retry); 272746d1c03cSJan Höppner 272846d1c03cSJan Höppner out: 272946d1c03cSJan Höppner fdata->start_unit = old_start; 273046d1c03cSJan Höppner fdata->stop_unit = old_stop; 2731d42e1712SStefan Haberland 2732d42e1712SStefan Haberland return rc; 2733d42e1712SStefan Haberland } 2734d42e1712SStefan Haberland 2735570d237cSJan Höppner static int dasd_eckd_format_device(struct dasd_device *base, 2736570d237cSJan Höppner struct format_data_t *fdata, int enable_pav) 2737570d237cSJan Höppner { 27388fd57520SJan Höppner return dasd_eckd_format_process_data(base, fdata, enable_pav, 0, NULL, 27398fd57520SJan Höppner 0, NULL); 27408fd57520SJan Höppner } 27418fd57520SJan Höppner 27428fd57520SJan Höppner /* 27438fd57520SJan Höppner * Helper function to count consecutive records of a single track. 27448fd57520SJan Höppner */ 27458fd57520SJan Höppner static int dasd_eckd_count_records(struct eckd_count *fmt_buffer, int start, 27468fd57520SJan Höppner int max) 27478fd57520SJan Höppner { 27488fd57520SJan Höppner int head; 27498fd57520SJan Höppner int i; 27508fd57520SJan Höppner 27518fd57520SJan Höppner head = fmt_buffer[start].head; 27528fd57520SJan Höppner 27538fd57520SJan Höppner /* 27548fd57520SJan Höppner * There are 3 conditions where we stop counting: 27558fd57520SJan Höppner * - if data reoccurs (same head and record may reoccur), which may 27568fd57520SJan Höppner * happen due to the way DASD_ECKD_CCW_READ_COUNT works 27578fd57520SJan Höppner * - when the head changes, because we're iterating over several tracks 27588fd57520SJan Höppner * then (DASD_ECKD_CCW_READ_COUNT_MT) 27598fd57520SJan Höppner * - when we've reached the end of sensible data in the buffer (the 27608fd57520SJan Höppner * record will be 0 then) 27618fd57520SJan Höppner */ 27628fd57520SJan Höppner for (i = start; i < max; i++) { 27638fd57520SJan Höppner if (i > start) { 27648fd57520SJan Höppner if ((fmt_buffer[i].head == head && 27658fd57520SJan Höppner fmt_buffer[i].record == 1) || 27668fd57520SJan Höppner fmt_buffer[i].head != head || 27678fd57520SJan Höppner fmt_buffer[i].record == 0) 27688fd57520SJan Höppner break; 27698fd57520SJan Höppner } 27708fd57520SJan Höppner } 27718fd57520SJan Höppner 27728fd57520SJan Höppner return i - start; 27738fd57520SJan Höppner } 27748fd57520SJan Höppner 27758fd57520SJan Höppner /* 27768fd57520SJan Höppner * Evaluate a given range of tracks. Data like number of records, blocksize, 27778fd57520SJan Höppner * record ids, and key length are compared with expected data. 27788fd57520SJan Höppner * 27798fd57520SJan Höppner * If a mismatch occurs, the corresponding error bit is set, as well as 27808fd57520SJan Höppner * additional information, depending on the error. 27818fd57520SJan Höppner */ 27828fd57520SJan Höppner static void dasd_eckd_format_evaluate_tracks(struct eckd_count *fmt_buffer, 27838fd57520SJan Höppner struct format_check_t *cdata, 27848fd57520SJan Höppner int rpt_max, int rpt_exp, 27858fd57520SJan Höppner int trk_per_cyl, int tpm) 27868fd57520SJan Höppner { 27878fd57520SJan Höppner struct ch_t geo; 27888fd57520SJan Höppner int max_entries; 27898fd57520SJan Höppner int count = 0; 27908fd57520SJan Höppner int trkcount; 27918fd57520SJan Höppner int blksize; 27928fd57520SJan Höppner int pos = 0; 27938fd57520SJan Höppner int i, j; 27948fd57520SJan Höppner int kl; 27958fd57520SJan Höppner 27968fd57520SJan Höppner trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; 27978fd57520SJan Höppner max_entries = trkcount * rpt_max; 27988fd57520SJan Höppner 27998fd57520SJan Höppner for (i = cdata->expect.start_unit; i <= cdata->expect.stop_unit; i++) { 28008fd57520SJan Höppner /* Calculate the correct next starting position in the buffer */ 28018fd57520SJan Höppner if (tpm) { 28028fd57520SJan Höppner while (fmt_buffer[pos].record == 0 && 28038fd57520SJan Höppner fmt_buffer[pos].dl == 0) { 28048fd57520SJan Höppner if (pos++ > max_entries) 28058fd57520SJan Höppner break; 28068fd57520SJan Höppner } 28078fd57520SJan Höppner } else { 28088fd57520SJan Höppner if (i != cdata->expect.start_unit) 28098fd57520SJan Höppner pos += rpt_max - count; 28108fd57520SJan Höppner } 28118fd57520SJan Höppner 28128fd57520SJan Höppner /* Calculate the expected geo values for the current track */ 28138fd57520SJan Höppner set_ch_t(&geo, i / trk_per_cyl, i % trk_per_cyl); 28148fd57520SJan Höppner 28158fd57520SJan Höppner /* Count and check number of records */ 28168fd57520SJan Höppner count = dasd_eckd_count_records(fmt_buffer, pos, pos + rpt_max); 28178fd57520SJan Höppner 28188fd57520SJan Höppner if (count < rpt_exp) { 28198fd57520SJan Höppner cdata->result = DASD_FMT_ERR_TOO_FEW_RECORDS; 28208fd57520SJan Höppner break; 28218fd57520SJan Höppner } 28228fd57520SJan Höppner if (count > rpt_exp) { 28238fd57520SJan Höppner cdata->result = DASD_FMT_ERR_TOO_MANY_RECORDS; 28248fd57520SJan Höppner break; 28258fd57520SJan Höppner } 28268fd57520SJan Höppner 28278fd57520SJan Höppner for (j = 0; j < count; j++, pos++) { 28288fd57520SJan Höppner blksize = cdata->expect.blksize; 28298fd57520SJan Höppner kl = 0; 28308fd57520SJan Höppner 28318fd57520SJan Höppner /* 28328fd57520SJan Höppner * Set special values when checking CDL formatted 28338fd57520SJan Höppner * devices. 28348fd57520SJan Höppner */ 28358fd57520SJan Höppner if ((cdata->expect.intensity & 0x08) && 28368fd57520SJan Höppner geo.cyl == 0 && geo.head == 0) { 28378fd57520SJan Höppner if (j < 3) { 28388fd57520SJan Höppner blksize = sizes_trk0[j] - 4; 28398fd57520SJan Höppner kl = 4; 28408fd57520SJan Höppner } 28418fd57520SJan Höppner } 28428fd57520SJan Höppner if ((cdata->expect.intensity & 0x08) && 28438fd57520SJan Höppner geo.cyl == 0 && geo.head == 1) { 28448fd57520SJan Höppner blksize = LABEL_SIZE - 44; 28458fd57520SJan Höppner kl = 44; 28468fd57520SJan Höppner } 28478fd57520SJan Höppner 28488fd57520SJan Höppner /* Check blocksize */ 28498fd57520SJan Höppner if (fmt_buffer[pos].dl != blksize) { 28508fd57520SJan Höppner cdata->result = DASD_FMT_ERR_BLKSIZE; 28518fd57520SJan Höppner goto out; 28528fd57520SJan Höppner } 28538fd57520SJan Höppner /* Check if key length is 0 */ 28548fd57520SJan Höppner if (fmt_buffer[pos].kl != kl) { 28558fd57520SJan Höppner cdata->result = DASD_FMT_ERR_KEY_LENGTH; 28568fd57520SJan Höppner goto out; 28578fd57520SJan Höppner } 28588fd57520SJan Höppner /* Check if record_id is correct */ 28598fd57520SJan Höppner if (fmt_buffer[pos].cyl != geo.cyl || 28608fd57520SJan Höppner fmt_buffer[pos].head != geo.head || 28618fd57520SJan Höppner fmt_buffer[pos].record != (j + 1)) { 28628fd57520SJan Höppner cdata->result = DASD_FMT_ERR_RECORD_ID; 28638fd57520SJan Höppner goto out; 28648fd57520SJan Höppner } 28658fd57520SJan Höppner } 28668fd57520SJan Höppner } 28678fd57520SJan Höppner 28688fd57520SJan Höppner out: 28698fd57520SJan Höppner /* 28708fd57520SJan Höppner * In case of no errors, we need to decrease by one 28718fd57520SJan Höppner * to get the correct positions. 28728fd57520SJan Höppner */ 28738fd57520SJan Höppner if (!cdata->result) { 28748fd57520SJan Höppner i--; 28758fd57520SJan Höppner pos--; 28768fd57520SJan Höppner } 28778fd57520SJan Höppner 28788fd57520SJan Höppner cdata->unit = i; 28798fd57520SJan Höppner cdata->num_records = count; 28808fd57520SJan Höppner cdata->rec = fmt_buffer[pos].record; 28818fd57520SJan Höppner cdata->blksize = fmt_buffer[pos].dl; 28828fd57520SJan Höppner cdata->key_length = fmt_buffer[pos].kl; 28838fd57520SJan Höppner } 28848fd57520SJan Höppner 28858fd57520SJan Höppner /* 28868fd57520SJan Höppner * Check the format of a range of tracks of a DASD. 28878fd57520SJan Höppner */ 28888fd57520SJan Höppner static int dasd_eckd_check_device_format(struct dasd_device *base, 28898fd57520SJan Höppner struct format_check_t *cdata, 28908fd57520SJan Höppner int enable_pav) 28918fd57520SJan Höppner { 28928fd57520SJan Höppner struct dasd_eckd_private *private = base->private; 28938fd57520SJan Höppner struct eckd_count *fmt_buffer; 28948fd57520SJan Höppner struct irb irb; 28958fd57520SJan Höppner int rpt_max, rpt_exp; 28968fd57520SJan Höppner int fmt_buffer_size; 28978fd57520SJan Höppner int trk_per_cyl; 28988fd57520SJan Höppner int trkcount; 28998fd57520SJan Höppner int tpm = 0; 29008fd57520SJan Höppner int rc; 29018fd57520SJan Höppner 29028fd57520SJan Höppner trk_per_cyl = private->rdc_data.trk_per_cyl; 29038fd57520SJan Höppner 29048fd57520SJan Höppner /* Get maximum and expected amount of records per track */ 29058fd57520SJan Höppner rpt_max = recs_per_track(&private->rdc_data, 0, 512) + 1; 29068fd57520SJan Höppner rpt_exp = recs_per_track(&private->rdc_data, 0, cdata->expect.blksize); 29078fd57520SJan Höppner 29088fd57520SJan Höppner trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; 29098fd57520SJan Höppner fmt_buffer_size = trkcount * rpt_max * sizeof(struct eckd_count); 29108fd57520SJan Höppner 29118fd57520SJan Höppner fmt_buffer = kzalloc(fmt_buffer_size, GFP_KERNEL | GFP_DMA); 29128fd57520SJan Höppner if (!fmt_buffer) 29138fd57520SJan Höppner return -ENOMEM; 29148fd57520SJan Höppner 29158fd57520SJan Höppner /* 29168fd57520SJan Höppner * A certain FICON feature subset is needed to operate in transport 29178fd57520SJan Höppner * mode. Additionally, the support for transport mode is implicitly 29188fd57520SJan Höppner * checked by comparing the buffer size with fcx_max_data. As long as 29198fd57520SJan Höppner * the buffer size is smaller we can operate in transport mode and 29208fd57520SJan Höppner * process multiple tracks. If not, only one track at once is being 29218fd57520SJan Höppner * processed using command mode. 29228fd57520SJan Höppner */ 29238fd57520SJan Höppner if ((private->features.feature[40] & 0x04) && 29248fd57520SJan Höppner fmt_buffer_size <= private->fcx_max_data) 29258fd57520SJan Höppner tpm = 1; 29268fd57520SJan Höppner 29278fd57520SJan Höppner rc = dasd_eckd_format_process_data(base, &cdata->expect, enable_pav, 29288fd57520SJan Höppner tpm, fmt_buffer, rpt_max, &irb); 29298fd57520SJan Höppner if (rc && rc != -EIO) 29308fd57520SJan Höppner goto out; 29318fd57520SJan Höppner if (rc == -EIO) { 29328fd57520SJan Höppner /* 29338fd57520SJan Höppner * If our first attempt with transport mode enabled comes back 29348fd57520SJan Höppner * with an incorrect length error, we're going to retry the 29358fd57520SJan Höppner * check with command mode. 29368fd57520SJan Höppner */ 29378fd57520SJan Höppner if (tpm && scsw_cstat(&irb.scsw) == 0x40) { 29388fd57520SJan Höppner tpm = 0; 29398fd57520SJan Höppner rc = dasd_eckd_format_process_data(base, &cdata->expect, 29408fd57520SJan Höppner enable_pav, tpm, 29418fd57520SJan Höppner fmt_buffer, rpt_max, 29428fd57520SJan Höppner &irb); 29438fd57520SJan Höppner if (rc) 29448fd57520SJan Höppner goto out; 29458fd57520SJan Höppner } else { 29468fd57520SJan Höppner goto out; 29478fd57520SJan Höppner } 29488fd57520SJan Höppner } 29498fd57520SJan Höppner 29508fd57520SJan Höppner dasd_eckd_format_evaluate_tracks(fmt_buffer, cdata, rpt_max, rpt_exp, 29518fd57520SJan Höppner trk_per_cyl, tpm); 29528fd57520SJan Höppner 29538fd57520SJan Höppner out: 29548fd57520SJan Höppner kfree(fmt_buffer); 29558fd57520SJan Höppner 29568fd57520SJan Höppner return rc; 2957570d237cSJan Höppner } 2958570d237cSJan Höppner 29598e09f215SStefan Weinhuber static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 29601da177e4SLinus Torvalds { 2961a2ace466SHannes Reinecke if (cqr->retries < 0) { 2962a2ace466SHannes Reinecke cqr->status = DASD_CQR_FAILED; 2963a2ace466SHannes Reinecke return; 2964a2ace466SHannes Reinecke } 29658e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 29668e09f215SStefan Weinhuber if (cqr->block && (cqr->startdev != cqr->block->base)) { 29678e09f215SStefan Weinhuber dasd_eckd_reset_ccw_to_base_io(cqr); 29688e09f215SStefan Weinhuber cqr->startdev = cqr->block->base; 2969a4d26c6aSStefan Weinhuber cqr->lpm = cqr->block->base->path_data.opm; 29701da177e4SLinus Torvalds } 29718e09f215SStefan Weinhuber }; 29721da177e4SLinus Torvalds 29731da177e4SLinus Torvalds static dasd_erp_fn_t 29741da177e4SLinus Torvalds dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 29751da177e4SLinus Torvalds { 29768e09f215SStefan Weinhuber struct dasd_device *device = (struct dasd_device *) cqr->startdev; 29771da177e4SLinus Torvalds struct ccw_device *cdev = device->cdev; 29781da177e4SLinus Torvalds 29791da177e4SLinus Torvalds switch (cdev->id.cu_type) { 29801da177e4SLinus Torvalds case 0x3990: 29811da177e4SLinus Torvalds case 0x2105: 29821da177e4SLinus Torvalds case 0x2107: 29831da177e4SLinus Torvalds case 0x1750: 29841da177e4SLinus Torvalds return dasd_3990_erp_action; 29851da177e4SLinus Torvalds case 0x9343: 29861da177e4SLinus Torvalds case 0x3880: 29871da177e4SLinus Torvalds default: 29881da177e4SLinus Torvalds return dasd_default_erp_action; 29891da177e4SLinus Torvalds } 29901da177e4SLinus Torvalds } 29911da177e4SLinus Torvalds 29921da177e4SLinus Torvalds static dasd_erp_fn_t 29931da177e4SLinus Torvalds dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 29941da177e4SLinus Torvalds { 29951da177e4SLinus Torvalds return dasd_default_erp_postaction; 29961da177e4SLinus Torvalds } 29971da177e4SLinus Torvalds 29985a27e60dSStefan Weinhuber static void dasd_eckd_check_for_device_change(struct dasd_device *device, 29995a27e60dSStefan Weinhuber struct dasd_ccw_req *cqr, 30008e09f215SStefan Weinhuber struct irb *irb) 30018e09f215SStefan Weinhuber { 30028e09f215SStefan Weinhuber char mask; 3003f3eb5384SStefan Weinhuber char *sense = NULL; 3004543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 30058e09f215SStefan Weinhuber 30068e09f215SStefan Weinhuber /* first of all check for state change pending interrupt */ 30078e09f215SStefan Weinhuber mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 3008f3eb5384SStefan Weinhuber if ((scsw_dstat(&irb->scsw) & mask) == mask) { 3009c8d1c0ffSStefan Haberland /* 3010c8d1c0ffSStefan Haberland * for alias only, not in offline processing 3011c8d1c0ffSStefan Haberland * and only if not suspended 3012c8d1c0ffSStefan Haberland */ 3013501183f2SStefan Haberland if (!device->block && private->lcu && 301425e2cf1cSStefan Haberland device->state == DASD_STATE_ONLINE && 3015c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_OFFLINE, &device->flags) && 3016c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 3017501183f2SStefan Haberland /* schedule worker to reload device */ 3018501183f2SStefan Haberland dasd_reload_device(device); 3019501183f2SStefan Haberland } 30208e09f215SStefan Weinhuber dasd_generic_handle_state_change(device); 30218e09f215SStefan Weinhuber return; 30228e09f215SStefan Weinhuber } 30238e09f215SStefan Weinhuber 3024a5a0061fSStefan Weinhuber sense = dasd_get_sense(irb); 30255a27e60dSStefan Weinhuber if (!sense) 30265a27e60dSStefan Weinhuber return; 30275a27e60dSStefan Weinhuber 30285a27e60dSStefan Weinhuber /* summary unit check */ 3029c7a29e56SStefan Weinhuber if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) && 3030a5a0061fSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { 303159a9ed5fSStefan Haberland if (test_and_set_bit(DASD_FLAG_SUC, &device->flags)) { 303259a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 303359a9ed5fSStefan Haberland "eckd suc: device already notified"); 303459a9ed5fSStefan Haberland return; 303559a9ed5fSStefan Haberland } 303659a9ed5fSStefan Haberland sense = dasd_get_sense(irb); 303759a9ed5fSStefan Haberland if (!sense) { 303859a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 303959a9ed5fSStefan Haberland "eckd suc: no reason code available"); 304059a9ed5fSStefan Haberland clear_bit(DASD_FLAG_SUC, &device->flags); 304159a9ed5fSStefan Haberland return; 304259a9ed5fSStefan Haberland 304359a9ed5fSStefan Haberland } 304459a9ed5fSStefan Haberland private->suc_reason = sense[8]; 304559a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_NOTICE, device, "%s %x", 304659a9ed5fSStefan Haberland "eckd handle summary unit check: reason", 304759a9ed5fSStefan Haberland private->suc_reason); 304859a9ed5fSStefan Haberland dasd_get_device(device); 304959a9ed5fSStefan Haberland if (!schedule_work(&device->suc_work)) 305059a9ed5fSStefan Haberland dasd_put_device(device); 305159a9ed5fSStefan Haberland 30528e09f215SStefan Weinhuber return; 30538e09f215SStefan Weinhuber } 30548e09f215SStefan Weinhuber 3055f60c768cSStefan Haberland /* service information message SIM */ 30565a27e60dSStefan Weinhuber if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && 3057f3eb5384SStefan Weinhuber ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 3058f3eb5384SStefan Weinhuber dasd_3990_erp_handle_sim(device, sense); 3059f60c768cSStefan Haberland return; 3060f60c768cSStefan Haberland } 3061f60c768cSStefan Haberland 30625a27e60dSStefan Weinhuber /* loss of device reservation is handled via base devices only 30635a27e60dSStefan Weinhuber * as alias devices may be used with several bases 30645a27e60dSStefan Weinhuber */ 3065c7a29e56SStefan Weinhuber if (device->block && (sense[27] & DASD_SENSE_BIT_0) && 3066c7a29e56SStefan Weinhuber (sense[7] == 0x3F) && 30675a27e60dSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && 30685a27e60dSStefan Weinhuber test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { 30695a27e60dSStefan Weinhuber if (device->features & DASD_FEATURE_FAILONSLCK) 30705a27e60dSStefan Weinhuber set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); 30715a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 30725a27e60dSStefan Weinhuber dev_err(&device->cdev->dev, 30735a27e60dSStefan Weinhuber "The device reservation was lost\n"); 3074ada3df91SStefan Haberland } 30755a27e60dSStefan Weinhuber } 3076f3eb5384SStefan Weinhuber 3077f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( 3078f3eb5384SStefan Weinhuber struct dasd_device *startdev, 30798e09f215SStefan Weinhuber struct dasd_block *block, 3080f3eb5384SStefan Weinhuber struct request *req, 3081f3eb5384SStefan Weinhuber sector_t first_rec, 3082f3eb5384SStefan Weinhuber sector_t last_rec, 3083f3eb5384SStefan Weinhuber sector_t first_trk, 3084f3eb5384SStefan Weinhuber sector_t last_trk, 3085f3eb5384SStefan Weinhuber unsigned int first_offs, 3086f3eb5384SStefan Weinhuber unsigned int last_offs, 3087f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 3088f3eb5384SStefan Weinhuber unsigned int blksize) 30891da177e4SLinus Torvalds { 30901da177e4SLinus Torvalds struct dasd_eckd_private *private; 30911da177e4SLinus Torvalds unsigned long *idaws; 30921da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 30931da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 30941da177e4SLinus Torvalds struct ccw1 *ccw; 30955705f702SNeilBrown struct req_iterator iter; 30967988613bSKent Overstreet struct bio_vec bv; 30971da177e4SLinus Torvalds char *dst; 3098f3eb5384SStefan Weinhuber unsigned int off; 30991da177e4SLinus Torvalds int count, cidaw, cplength, datasize; 3100f3eb5384SStefan Weinhuber sector_t recid; 31011da177e4SLinus Torvalds unsigned char cmd, rcmd; 31028e09f215SStefan Weinhuber int use_prefix; 31038e09f215SStefan Weinhuber struct dasd_device *basedev; 31041da177e4SLinus Torvalds 31058e09f215SStefan Weinhuber basedev = block->base; 3106543691a4SSebastian Ott private = basedev->private; 31071da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 31081da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_READ_MT; 31091da177e4SLinus Torvalds else if (rq_data_dir(req) == WRITE) 31101da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_WRITE_MT; 31111da177e4SLinus Torvalds else 31121da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 3113f3eb5384SStefan Weinhuber 31141da177e4SLinus Torvalds /* Check struct bio and count the number of blocks for the request. */ 31151da177e4SLinus Torvalds count = 0; 31161da177e4SLinus Torvalds cidaw = 0; 31175705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 31187988613bSKent Overstreet if (bv.bv_len & (blksize - 1)) 31191da177e4SLinus Torvalds /* Eckd can only do full blocks. */ 31201da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 31217988613bSKent Overstreet count += bv.bv_len >> (block->s2b_shift + 9); 31227988613bSKent Overstreet if (idal_is_needed (page_address(bv.bv_page), bv.bv_len)) 31237988613bSKent Overstreet cidaw += bv.bv_len >> (block->s2b_shift + 9); 31241da177e4SLinus Torvalds } 31251da177e4SLinus Torvalds /* Paranoia. */ 31261da177e4SLinus Torvalds if (count != last_rec - first_rec + 1) 31271da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 31288e09f215SStefan Weinhuber 31298e09f215SStefan Weinhuber /* use the prefix command if available */ 31308e09f215SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 31318e09f215SStefan Weinhuber if (use_prefix) { 31328e09f215SStefan Weinhuber /* 1x prefix + number of blocks */ 31338e09f215SStefan Weinhuber cplength = 2 + count; 31348e09f215SStefan Weinhuber /* 1x prefix + cidaws*sizeof(long) */ 31358e09f215SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 31368e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 31378e09f215SStefan Weinhuber cidaw * sizeof(unsigned long); 31388e09f215SStefan Weinhuber } else { 31391da177e4SLinus Torvalds /* 1x define extent + 1x locate record + number of blocks */ 31401da177e4SLinus Torvalds cplength = 2 + count; 31411da177e4SLinus Torvalds /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 31428e09f215SStefan Weinhuber datasize = sizeof(struct DE_eckd_data) + 31438e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 31441da177e4SLinus Torvalds cidaw * sizeof(unsigned long); 31458e09f215SStefan Weinhuber } 31461da177e4SLinus Torvalds /* Find out the number of additional locate record ccws for cdl. */ 31471da177e4SLinus Torvalds if (private->uses_cdl && first_rec < 2*blk_per_trk) { 31481da177e4SLinus Torvalds if (last_rec >= 2*blk_per_trk) 31491da177e4SLinus Torvalds count = 2*blk_per_trk - first_rec; 31501da177e4SLinus Torvalds cplength += count; 31511da177e4SLinus Torvalds datasize += count*sizeof(struct LO_eckd_data); 31521da177e4SLinus Torvalds } 31531da177e4SLinus Torvalds /* Allocate the ccw request. */ 315468b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 315568b781feSStefan Haberland startdev); 31561da177e4SLinus Torvalds if (IS_ERR(cqr)) 31571da177e4SLinus Torvalds return cqr; 31581da177e4SLinus Torvalds ccw = cqr->cpaddr; 31598e09f215SStefan Weinhuber /* First ccw is define extent or prefix. */ 31608e09f215SStefan Weinhuber if (use_prefix) { 31618e09f215SStefan Weinhuber if (prefix(ccw++, cqr->data, first_trk, 31628e09f215SStefan Weinhuber last_trk, cmd, basedev, startdev) == -EAGAIN) { 31638e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 31648e09f215SStefan Weinhuber * Try again later. 31658e09f215SStefan Weinhuber */ 31668e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 3167d54853efSMartin Schwidefsky return ERR_PTR(-EAGAIN); 3168d54853efSMartin Schwidefsky } 31698e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 31708e09f215SStefan Weinhuber sizeof(struct PFX_eckd_data)); 31718e09f215SStefan Weinhuber } else { 31728e09f215SStefan Weinhuber if (define_extent(ccw++, cqr->data, first_trk, 3173b38f27e8SStefan Haberland last_trk, cmd, basedev) == -EAGAIN) { 31748e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 31758e09f215SStefan Weinhuber * Try again later. 31768e09f215SStefan Weinhuber */ 31778e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 31788e09f215SStefan Weinhuber return ERR_PTR(-EAGAIN); 31798e09f215SStefan Weinhuber } 31808e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 31818e09f215SStefan Weinhuber sizeof(struct DE_eckd_data)); 31828e09f215SStefan Weinhuber } 31831da177e4SLinus Torvalds /* Build locate_record+read/write/ccws. */ 31841da177e4SLinus Torvalds LO_data = (struct LO_eckd_data *) (idaws + cidaw); 31851da177e4SLinus Torvalds recid = first_rec; 31861da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 31871da177e4SLinus Torvalds /* Only standard blocks so there is just one locate record. */ 31881da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 31891da177e4SLinus Torvalds locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 31908e09f215SStefan Weinhuber last_rec - recid + 1, cmd, basedev, blksize); 31911da177e4SLinus Torvalds } 31925705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 31937988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 31941da177e4SLinus Torvalds if (dasd_page_cache) { 31951da177e4SLinus Torvalds char *copy = kmem_cache_alloc(dasd_page_cache, 3196441e143eSChristoph Lameter GFP_DMA | __GFP_NOWARN); 31971da177e4SLinus Torvalds if (copy && rq_data_dir(req) == WRITE) 31987988613bSKent Overstreet memcpy(copy + bv.bv_offset, dst, bv.bv_len); 31991da177e4SLinus Torvalds if (copy) 32007988613bSKent Overstreet dst = copy + bv.bv_offset; 32011da177e4SLinus Torvalds } 32027988613bSKent Overstreet for (off = 0; off < bv.bv_len; off += blksize) { 32031da177e4SLinus Torvalds sector_t trkid = recid; 32041da177e4SLinus Torvalds unsigned int recoffs = sector_div(trkid, blk_per_trk); 32051da177e4SLinus Torvalds rcmd = cmd; 32061da177e4SLinus Torvalds count = blksize; 32071da177e4SLinus Torvalds /* Locate record for cdl special block ? */ 32081da177e4SLinus Torvalds if (private->uses_cdl && recid < 2*blk_per_trk) { 32091da177e4SLinus Torvalds if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 32101da177e4SLinus Torvalds rcmd |= 0x8; 32111da177e4SLinus Torvalds count = dasd_eckd_cdl_reclen(recid); 3212ec5883abSHorst Hummel if (count < blksize && 3213ec5883abSHorst Hummel rq_data_dir(req) == READ) 32141da177e4SLinus Torvalds memset(dst + count, 0xe5, 32151da177e4SLinus Torvalds blksize - count); 32161da177e4SLinus Torvalds } 32171da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 32181da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 32191da177e4SLinus Torvalds trkid, recoffs + 1, 32208e09f215SStefan Weinhuber 1, rcmd, basedev, count); 32211da177e4SLinus Torvalds } 32221da177e4SLinus Torvalds /* Locate record for standard blocks ? */ 32231da177e4SLinus Torvalds if (private->uses_cdl && recid == 2*blk_per_trk) { 32241da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 32251da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 32261da177e4SLinus Torvalds trkid, recoffs + 1, 32271da177e4SLinus Torvalds last_rec - recid + 1, 32288e09f215SStefan Weinhuber cmd, basedev, count); 32291da177e4SLinus Torvalds } 32301da177e4SLinus Torvalds /* Read/write ccw. */ 32311da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 32321da177e4SLinus Torvalds ccw->cmd_code = rcmd; 32331da177e4SLinus Torvalds ccw->count = count; 32341da177e4SLinus Torvalds if (idal_is_needed(dst, blksize)) { 32351da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) idaws; 32361da177e4SLinus Torvalds ccw->flags = CCW_FLAG_IDA; 32371da177e4SLinus Torvalds idaws = idal_create_words(idaws, dst, blksize); 32381da177e4SLinus Torvalds } else { 32391da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) dst; 32401da177e4SLinus Torvalds ccw->flags = 0; 32411da177e4SLinus Torvalds } 32421da177e4SLinus Torvalds ccw++; 32431da177e4SLinus Torvalds dst += blksize; 32441da177e4SLinus Torvalds recid++; 32451da177e4SLinus Torvalds } 32461da177e4SLinus Torvalds } 324713de227bSHolger Smolinski if (blk_noretry_request(req) || 324813de227bSHolger Smolinski block->base->features & DASD_FEATURE_FAILFAST) 32491c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 32508e09f215SStefan Weinhuber cqr->startdev = startdev; 32518e09f215SStefan Weinhuber cqr->memdev = startdev; 32528e09f215SStefan Weinhuber cqr->block = block; 32537c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 3254a4d26c6aSStefan Weinhuber cqr->lpm = startdev->path_data.ppm; 32551f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 32561aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 32571da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 32581da177e4SLinus Torvalds return cqr; 32591da177e4SLinus Torvalds } 32601da177e4SLinus Torvalds 3261f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 3262f3eb5384SStefan Weinhuber struct dasd_device *startdev, 3263f3eb5384SStefan Weinhuber struct dasd_block *block, 3264f3eb5384SStefan Weinhuber struct request *req, 3265f3eb5384SStefan Weinhuber sector_t first_rec, 3266f3eb5384SStefan Weinhuber sector_t last_rec, 3267f3eb5384SStefan Weinhuber sector_t first_trk, 3268f3eb5384SStefan Weinhuber sector_t last_trk, 3269f3eb5384SStefan Weinhuber unsigned int first_offs, 3270f3eb5384SStefan Weinhuber unsigned int last_offs, 3271f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 3272f3eb5384SStefan Weinhuber unsigned int blksize) 3273f3eb5384SStefan Weinhuber { 3274f3eb5384SStefan Weinhuber unsigned long *idaws; 3275f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 3276f3eb5384SStefan Weinhuber struct ccw1 *ccw; 3277f3eb5384SStefan Weinhuber struct req_iterator iter; 32787988613bSKent Overstreet struct bio_vec bv; 3279f3eb5384SStefan Weinhuber char *dst, *idaw_dst; 3280f3eb5384SStefan Weinhuber unsigned int cidaw, cplength, datasize; 3281f3eb5384SStefan Weinhuber unsigned int tlf; 3282f3eb5384SStefan Weinhuber sector_t recid; 3283f3eb5384SStefan Weinhuber unsigned char cmd; 3284f3eb5384SStefan Weinhuber struct dasd_device *basedev; 3285f3eb5384SStefan Weinhuber unsigned int trkcount, count, count_to_trk_end; 3286f3eb5384SStefan Weinhuber unsigned int idaw_len, seg_len, part_len, len_to_track_end; 3287f3eb5384SStefan Weinhuber unsigned char new_track, end_idaw; 3288f3eb5384SStefan Weinhuber sector_t trkid; 3289f3eb5384SStefan Weinhuber unsigned int recoffs; 3290f3eb5384SStefan Weinhuber 3291f3eb5384SStefan Weinhuber basedev = block->base; 3292f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) 3293f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 3294f3eb5384SStefan Weinhuber else if (rq_data_dir(req) == WRITE) 3295f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 3296f3eb5384SStefan Weinhuber else 3297f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 3298f3eb5384SStefan Weinhuber 3299f3eb5384SStefan Weinhuber /* Track based I/O needs IDAWs for each page, and not just for 3300f3eb5384SStefan Weinhuber * 64 bit addresses. We need additional idals for pages 3301f3eb5384SStefan Weinhuber * that get filled from two tracks, so we use the number 3302f3eb5384SStefan Weinhuber * of records as upper limit. 3303f3eb5384SStefan Weinhuber */ 3304f3eb5384SStefan Weinhuber cidaw = last_rec - first_rec + 1; 3305f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 3306f3eb5384SStefan Weinhuber 3307f3eb5384SStefan Weinhuber /* 1x prefix + one read/write ccw per track */ 3308f3eb5384SStefan Weinhuber cplength = 1 + trkcount; 3309f3eb5384SStefan Weinhuber 3310f3eb5384SStefan Weinhuber /* on 31-bit we need space for two 32 bit addresses per page 3311f3eb5384SStefan Weinhuber * on 64-bit one 64 bit address 3312f3eb5384SStefan Weinhuber */ 3313f3eb5384SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 3314f3eb5384SStefan Weinhuber cidaw * sizeof(unsigned long long); 3315f3eb5384SStefan Weinhuber 3316f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 331768b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 331868b781feSStefan Haberland startdev); 3319f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 3320f3eb5384SStefan Weinhuber return cqr; 3321f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 3322f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 3323f3eb5384SStefan Weinhuber if (first_trk == last_trk) 3324f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 3325f3eb5384SStefan Weinhuber else 3326f3eb5384SStefan Weinhuber tlf = last_offs + 1; 3327f3eb5384SStefan Weinhuber tlf *= blksize; 3328f3eb5384SStefan Weinhuber 3329f3eb5384SStefan Weinhuber if (prefix_LRE(ccw++, cqr->data, first_trk, 3330f3eb5384SStefan Weinhuber last_trk, cmd, basedev, startdev, 3331f3eb5384SStefan Weinhuber 1 /* format */, first_offs + 1, 3332f3eb5384SStefan Weinhuber trkcount, blksize, 3333f3eb5384SStefan Weinhuber tlf) == -EAGAIN) { 3334f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 3335f3eb5384SStefan Weinhuber * Try again later. 3336f3eb5384SStefan Weinhuber */ 3337f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 3338f3eb5384SStefan Weinhuber return ERR_PTR(-EAGAIN); 3339f3eb5384SStefan Weinhuber } 3340f3eb5384SStefan Weinhuber 3341f3eb5384SStefan Weinhuber /* 3342f3eb5384SStefan Weinhuber * The translation of request into ccw programs must meet the 3343f3eb5384SStefan Weinhuber * following conditions: 3344f3eb5384SStefan Weinhuber * - all idaws but the first and the last must address full pages 3345f3eb5384SStefan Weinhuber * (or 2K blocks on 31-bit) 3346f3eb5384SStefan Weinhuber * - the scope of a ccw and it's idal ends with the track boundaries 3347f3eb5384SStefan Weinhuber */ 3348f3eb5384SStefan Weinhuber idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); 3349f3eb5384SStefan Weinhuber recid = first_rec; 3350f3eb5384SStefan Weinhuber new_track = 1; 3351f3eb5384SStefan Weinhuber end_idaw = 0; 3352f3eb5384SStefan Weinhuber len_to_track_end = 0; 3353246ccea1SMartin Schwidefsky idaw_dst = NULL; 3354f3eb5384SStefan Weinhuber idaw_len = 0; 3355f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 33567988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 33577988613bSKent Overstreet seg_len = bv.bv_len; 3358f3eb5384SStefan Weinhuber while (seg_len) { 3359f3eb5384SStefan Weinhuber if (new_track) { 3360f3eb5384SStefan Weinhuber trkid = recid; 3361f3eb5384SStefan Weinhuber recoffs = sector_div(trkid, blk_per_trk); 3362f3eb5384SStefan Weinhuber count_to_trk_end = blk_per_trk - recoffs; 3363f3eb5384SStefan Weinhuber count = min((last_rec - recid + 1), 3364f3eb5384SStefan Weinhuber (sector_t)count_to_trk_end); 3365f3eb5384SStefan Weinhuber len_to_track_end = count * blksize; 3366f3eb5384SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 3367f3eb5384SStefan Weinhuber ccw->cmd_code = cmd; 3368f3eb5384SStefan Weinhuber ccw->count = len_to_track_end; 3369f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 3370f3eb5384SStefan Weinhuber ccw->flags = CCW_FLAG_IDA; 3371f3eb5384SStefan Weinhuber ccw++; 3372f3eb5384SStefan Weinhuber recid += count; 3373f3eb5384SStefan Weinhuber new_track = 0; 337452db45c3SStefan Weinhuber /* first idaw for a ccw may start anywhere */ 337552db45c3SStefan Weinhuber if (!idaw_dst) 337652db45c3SStefan Weinhuber idaw_dst = dst; 3377f3eb5384SStefan Weinhuber } 337852db45c3SStefan Weinhuber /* If we start a new idaw, we must make sure that it 337952db45c3SStefan Weinhuber * starts on an IDA_BLOCK_SIZE boundary. 3380f3eb5384SStefan Weinhuber * If we continue an idaw, we must make sure that the 3381f3eb5384SStefan Weinhuber * current segment begins where the so far accumulated 3382f3eb5384SStefan Weinhuber * idaw ends 3383f3eb5384SStefan Weinhuber */ 338452db45c3SStefan Weinhuber if (!idaw_dst) { 338552db45c3SStefan Weinhuber if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { 338652db45c3SStefan Weinhuber dasd_sfree_request(cqr, startdev); 338752db45c3SStefan Weinhuber return ERR_PTR(-ERANGE); 338852db45c3SStefan Weinhuber } else 3389f3eb5384SStefan Weinhuber idaw_dst = dst; 339052db45c3SStefan Weinhuber } 3391f3eb5384SStefan Weinhuber if ((idaw_dst + idaw_len) != dst) { 3392f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 3393f3eb5384SStefan Weinhuber return ERR_PTR(-ERANGE); 3394f3eb5384SStefan Weinhuber } 3395f3eb5384SStefan Weinhuber part_len = min(seg_len, len_to_track_end); 3396f3eb5384SStefan Weinhuber seg_len -= part_len; 3397f3eb5384SStefan Weinhuber dst += part_len; 3398f3eb5384SStefan Weinhuber idaw_len += part_len; 3399f3eb5384SStefan Weinhuber len_to_track_end -= part_len; 3400f3eb5384SStefan Weinhuber /* collected memory area ends on an IDA_BLOCK border, 3401f3eb5384SStefan Weinhuber * -> create an idaw 3402f3eb5384SStefan Weinhuber * idal_create_words will handle cases where idaw_len 3403f3eb5384SStefan Weinhuber * is larger then IDA_BLOCK_SIZE 3404f3eb5384SStefan Weinhuber */ 3405f3eb5384SStefan Weinhuber if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) 3406f3eb5384SStefan Weinhuber end_idaw = 1; 3407f3eb5384SStefan Weinhuber /* We also need to end the idaw at track end */ 3408f3eb5384SStefan Weinhuber if (!len_to_track_end) { 3409f3eb5384SStefan Weinhuber new_track = 1; 3410f3eb5384SStefan Weinhuber end_idaw = 1; 3411f3eb5384SStefan Weinhuber } 3412f3eb5384SStefan Weinhuber if (end_idaw) { 3413f3eb5384SStefan Weinhuber idaws = idal_create_words(idaws, idaw_dst, 3414f3eb5384SStefan Weinhuber idaw_len); 3415246ccea1SMartin Schwidefsky idaw_dst = NULL; 3416f3eb5384SStefan Weinhuber idaw_len = 0; 3417f3eb5384SStefan Weinhuber end_idaw = 0; 3418f3eb5384SStefan Weinhuber } 3419f3eb5384SStefan Weinhuber } 3420f3eb5384SStefan Weinhuber } 3421f3eb5384SStefan Weinhuber 3422f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 3423f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 3424f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3425f3eb5384SStefan Weinhuber cqr->startdev = startdev; 3426f3eb5384SStefan Weinhuber cqr->memdev = startdev; 3427f3eb5384SStefan Weinhuber cqr->block = block; 34287c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 3429a4d26c6aSStefan Weinhuber cqr->lpm = startdev->path_data.ppm; 34301f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 34311aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 3432f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 3433f3eb5384SStefan Weinhuber return cqr; 3434f3eb5384SStefan Weinhuber } 3435f3eb5384SStefan Weinhuber 3436f3eb5384SStefan Weinhuber static int prepare_itcw(struct itcw *itcw, 3437f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 3438f3eb5384SStefan Weinhuber struct dasd_device *basedev, 3439f3eb5384SStefan Weinhuber struct dasd_device *startdev, 3440f3eb5384SStefan Weinhuber unsigned int rec_on_trk, int count, 3441f3eb5384SStefan Weinhuber unsigned int blksize, 3442f3eb5384SStefan Weinhuber unsigned int total_data_size, 3443f3eb5384SStefan Weinhuber unsigned int tlf, 3444f3eb5384SStefan Weinhuber unsigned int blk_per_trk) 3445f3eb5384SStefan Weinhuber { 3446f3eb5384SStefan Weinhuber struct PFX_eckd_data pfxdata; 3447f3eb5384SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 3448f3eb5384SStefan Weinhuber struct DE_eckd_data *dedata; 3449f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 3450f3eb5384SStefan Weinhuber struct dcw *dcw; 3451f3eb5384SStefan Weinhuber 3452f3eb5384SStefan Weinhuber u32 begcyl, endcyl; 3453f3eb5384SStefan Weinhuber u16 heads, beghead, endhead; 3454f3eb5384SStefan Weinhuber u8 pfx_cmd; 3455f3eb5384SStefan Weinhuber 3456f3eb5384SStefan Weinhuber int rc = 0; 3457f3eb5384SStefan Weinhuber int sector = 0; 3458f3eb5384SStefan Weinhuber int dn, d; 3459f3eb5384SStefan Weinhuber 3460f3eb5384SStefan Weinhuber 3461f3eb5384SStefan Weinhuber /* setup prefix data */ 3462543691a4SSebastian Ott basepriv = basedev->private; 3463543691a4SSebastian Ott startpriv = startdev->private; 3464f3eb5384SStefan Weinhuber dedata = &pfxdata.define_extent; 3465f3eb5384SStefan Weinhuber lredata = &pfxdata.locate_record; 3466f3eb5384SStefan Weinhuber 3467f3eb5384SStefan Weinhuber memset(&pfxdata, 0, sizeof(pfxdata)); 3468f3eb5384SStefan Weinhuber pfxdata.format = 1; /* PFX with LRE */ 3469f3eb5384SStefan Weinhuber pfxdata.base_address = basepriv->ned->unit_addr; 3470f3eb5384SStefan Weinhuber pfxdata.base_lss = basepriv->ned->ID; 3471f3eb5384SStefan Weinhuber pfxdata.validity.define_extent = 1; 3472f3eb5384SStefan Weinhuber 3473f3eb5384SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 3474f3eb5384SStefan Weinhuber if (startpriv->uid.type != UA_BASE_DEVICE) { 3475f3eb5384SStefan Weinhuber pfxdata.validity.verify_base = 1; 3476f3eb5384SStefan Weinhuber if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 3477f3eb5384SStefan Weinhuber pfxdata.validity.hyper_pav = 1; 3478f3eb5384SStefan Weinhuber } 3479f3eb5384SStefan Weinhuber 3480f3eb5384SStefan Weinhuber switch (cmd) { 3481f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 3482f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 3483f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 3484f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 3485f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 3486f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 3487f3eb5384SStefan Weinhuber lredata->operation.operation = 0x0C; 3488f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x01; 3489f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX_READ; 3490f3eb5384SStefan Weinhuber break; 3491f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 3492f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 3493f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 3494f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 3495f3eb5384SStefan Weinhuber rc = check_XRC_on_prefix(&pfxdata, basedev); 3496f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 3497f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 3498f3eb5384SStefan Weinhuber lredata->operation.operation = 0x3F; 3499f3eb5384SStefan Weinhuber lredata->extended_operation = 0x23; 3500f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x2; 3501f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX; 3502f3eb5384SStefan Weinhuber break; 35038fd57520SJan Höppner case DASD_ECKD_CCW_READ_COUNT_MT: 35048fd57520SJan Höppner dedata->mask.perm = 0x1; 35058fd57520SJan Höppner dedata->attributes.operation = DASD_BYPASS_CACHE; 35068fd57520SJan Höppner dedata->ga_extended |= 0x42; 35078fd57520SJan Höppner dedata->blk_size = blksize; 35088fd57520SJan Höppner lredata->operation.orientation = 0x2; 35098fd57520SJan Höppner lredata->operation.operation = 0x16; 35108fd57520SJan Höppner lredata->auxiliary.check_bytes = 0x01; 35118fd57520SJan Höppner pfx_cmd = DASD_ECKD_CCW_PFX_READ; 35128fd57520SJan Höppner break; 3513f3eb5384SStefan Weinhuber default: 3514f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 3515f3eb5384SStefan Weinhuber "prepare itcw, unknown opcode 0x%x", cmd); 3516f3eb5384SStefan Weinhuber BUG(); 3517f3eb5384SStefan Weinhuber break; 3518f3eb5384SStefan Weinhuber } 3519f3eb5384SStefan Weinhuber if (rc) 3520f3eb5384SStefan Weinhuber return rc; 3521f3eb5384SStefan Weinhuber 3522f3eb5384SStefan Weinhuber dedata->attributes.mode = 0x3; /* ECKD */ 3523f3eb5384SStefan Weinhuber 3524f3eb5384SStefan Weinhuber heads = basepriv->rdc_data.trk_per_cyl; 3525f3eb5384SStefan Weinhuber begcyl = trk / heads; 3526f3eb5384SStefan Weinhuber beghead = trk % heads; 3527f3eb5384SStefan Weinhuber endcyl = totrk / heads; 3528f3eb5384SStefan Weinhuber endhead = totrk % heads; 3529f3eb5384SStefan Weinhuber 3530f3eb5384SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 3531f3eb5384SStefan Weinhuber if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 3532f3eb5384SStefan Weinhuber dedata->attributes.operation == DASD_SEQ_ACCESS) { 3533f3eb5384SStefan Weinhuber 3534f3eb5384SStefan Weinhuber if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 3535f3eb5384SStefan Weinhuber endcyl += basepriv->attrib.nr_cyl; 3536f3eb5384SStefan Weinhuber else 3537f3eb5384SStefan Weinhuber endcyl = (basepriv->real_cyl - 1); 3538f3eb5384SStefan Weinhuber } 3539f3eb5384SStefan Weinhuber 3540f3eb5384SStefan Weinhuber set_ch_t(&dedata->beg_ext, begcyl, beghead); 3541f3eb5384SStefan Weinhuber set_ch_t(&dedata->end_ext, endcyl, endhead); 3542f3eb5384SStefan Weinhuber 3543f3eb5384SStefan Weinhuber dedata->ep_format = 0x20; /* records per track is valid */ 3544f3eb5384SStefan Weinhuber dedata->ep_rec_per_track = blk_per_trk; 3545f3eb5384SStefan Weinhuber 3546f3eb5384SStefan Weinhuber if (rec_on_trk) { 3547f3eb5384SStefan Weinhuber switch (basepriv->rdc_data.dev_type) { 3548f3eb5384SStefan Weinhuber case 0x3390: 3549f3eb5384SStefan Weinhuber dn = ceil_quot(blksize + 6, 232); 3550f3eb5384SStefan Weinhuber d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); 3551f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 3552f3eb5384SStefan Weinhuber break; 3553f3eb5384SStefan Weinhuber case 0x3380: 3554f3eb5384SStefan Weinhuber d = 7 + ceil_quot(blksize + 12, 32); 3555f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 3556f3eb5384SStefan Weinhuber break; 3557f3eb5384SStefan Weinhuber } 3558f3eb5384SStefan Weinhuber } 3559f3eb5384SStefan Weinhuber 35608fd57520SJan Höppner if (cmd == DASD_ECKD_CCW_READ_COUNT_MT) { 35618fd57520SJan Höppner lredata->auxiliary.length_valid = 0; 35628fd57520SJan Höppner lredata->auxiliary.length_scope = 0; 35638fd57520SJan Höppner lredata->sector = 0xff; 35648fd57520SJan Höppner } else { 3565f3eb5384SStefan Weinhuber lredata->auxiliary.length_valid = 1; 3566f3eb5384SStefan Weinhuber lredata->auxiliary.length_scope = 1; 35678fd57520SJan Höppner lredata->sector = sector; 35688fd57520SJan Höppner } 3569f3eb5384SStefan Weinhuber lredata->auxiliary.imbedded_ccw_valid = 1; 3570f3eb5384SStefan Weinhuber lredata->length = tlf; 3571f3eb5384SStefan Weinhuber lredata->imbedded_ccw = cmd; 3572f3eb5384SStefan Weinhuber lredata->count = count; 3573f3eb5384SStefan Weinhuber set_ch_t(&lredata->seek_addr, begcyl, beghead); 3574f3eb5384SStefan Weinhuber lredata->search_arg.cyl = lredata->seek_addr.cyl; 3575f3eb5384SStefan Weinhuber lredata->search_arg.head = lredata->seek_addr.head; 3576f3eb5384SStefan Weinhuber lredata->search_arg.record = rec_on_trk; 3577f3eb5384SStefan Weinhuber 3578f3eb5384SStefan Weinhuber dcw = itcw_add_dcw(itcw, pfx_cmd, 0, 3579f3eb5384SStefan Weinhuber &pfxdata, sizeof(pfxdata), total_data_size); 358082a7b955SThomas Meyer return PTR_RET(dcw); 3581f3eb5384SStefan Weinhuber } 3582f3eb5384SStefan Weinhuber 3583f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 3584f3eb5384SStefan Weinhuber struct dasd_device *startdev, 3585f3eb5384SStefan Weinhuber struct dasd_block *block, 3586f3eb5384SStefan Weinhuber struct request *req, 3587f3eb5384SStefan Weinhuber sector_t first_rec, 3588f3eb5384SStefan Weinhuber sector_t last_rec, 3589f3eb5384SStefan Weinhuber sector_t first_trk, 3590f3eb5384SStefan Weinhuber sector_t last_trk, 3591f3eb5384SStefan Weinhuber unsigned int first_offs, 3592f3eb5384SStefan Weinhuber unsigned int last_offs, 3593f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 3594f3eb5384SStefan Weinhuber unsigned int blksize) 3595f3eb5384SStefan Weinhuber { 3596f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 3597f3eb5384SStefan Weinhuber struct req_iterator iter; 35987988613bSKent Overstreet struct bio_vec bv; 3599f3eb5384SStefan Weinhuber char *dst; 3600f3eb5384SStefan Weinhuber unsigned int trkcount, ctidaw; 3601f3eb5384SStefan Weinhuber unsigned char cmd; 3602f3eb5384SStefan Weinhuber struct dasd_device *basedev; 3603f3eb5384SStefan Weinhuber unsigned int tlf; 3604f3eb5384SStefan Weinhuber struct itcw *itcw; 3605f3eb5384SStefan Weinhuber struct tidaw *last_tidaw = NULL; 3606f3eb5384SStefan Weinhuber int itcw_op; 3607f3eb5384SStefan Weinhuber size_t itcw_size; 3608ef19298bSStefan Weinhuber u8 tidaw_flags; 3609ef19298bSStefan Weinhuber unsigned int seg_len, part_len, len_to_track_end; 3610ef19298bSStefan Weinhuber unsigned char new_track; 3611ef19298bSStefan Weinhuber sector_t recid, trkid; 3612ef19298bSStefan Weinhuber unsigned int offs; 3613ef19298bSStefan Weinhuber unsigned int count, count_to_trk_end; 3614cd10502bSJulia Lawall int ret; 3615f3eb5384SStefan Weinhuber 3616f3eb5384SStefan Weinhuber basedev = block->base; 3617f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) { 3618f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 3619f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_READ; 3620f3eb5384SStefan Weinhuber } else if (rq_data_dir(req) == WRITE) { 3621f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 3622f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_WRITE; 3623f3eb5384SStefan Weinhuber } else 3624f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 3625f3eb5384SStefan Weinhuber 3626f3eb5384SStefan Weinhuber /* trackbased I/O needs address all memory via TIDAWs, 3627f3eb5384SStefan Weinhuber * not just for 64 bit addresses. This allows us to map 3628f3eb5384SStefan Weinhuber * each segment directly to one tidaw. 3629ef19298bSStefan Weinhuber * In the case of write requests, additional tidaws may 3630ef19298bSStefan Weinhuber * be needed when a segment crosses a track boundary. 3631f3eb5384SStefan Weinhuber */ 3632f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 3633f3eb5384SStefan Weinhuber ctidaw = 0; 3634f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 3635f3eb5384SStefan Weinhuber ++ctidaw; 3636f3eb5384SStefan Weinhuber } 3637ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 3638ef19298bSStefan Weinhuber ctidaw += (last_trk - first_trk); 3639f3eb5384SStefan Weinhuber 3640f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 3641f3eb5384SStefan Weinhuber itcw_size = itcw_calc_size(0, ctidaw, 0); 364268b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 3643f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 3644f3eb5384SStefan Weinhuber return cqr; 3645f3eb5384SStefan Weinhuber 3646f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 3647f3eb5384SStefan Weinhuber if (first_trk == last_trk) 3648f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 3649f3eb5384SStefan Weinhuber else 3650f3eb5384SStefan Weinhuber tlf = last_offs + 1; 3651f3eb5384SStefan Weinhuber tlf *= blksize; 3652f3eb5384SStefan Weinhuber 3653f3eb5384SStefan Weinhuber itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); 3654ef19298bSStefan Weinhuber if (IS_ERR(itcw)) { 3655cd10502bSJulia Lawall ret = -EINVAL; 3656cd10502bSJulia Lawall goto out_error; 3657ef19298bSStefan Weinhuber } 3658f3eb5384SStefan Weinhuber cqr->cpaddr = itcw_get_tcw(itcw); 3659f3eb5384SStefan Weinhuber if (prepare_itcw(itcw, first_trk, last_trk, 3660f3eb5384SStefan Weinhuber cmd, basedev, startdev, 3661f3eb5384SStefan Weinhuber first_offs + 1, 3662f3eb5384SStefan Weinhuber trkcount, blksize, 3663f3eb5384SStefan Weinhuber (last_rec - first_rec + 1) * blksize, 3664f3eb5384SStefan Weinhuber tlf, blk_per_trk) == -EAGAIN) { 3665f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 3666f3eb5384SStefan Weinhuber * Try again later. 3667f3eb5384SStefan Weinhuber */ 3668cd10502bSJulia Lawall ret = -EAGAIN; 3669cd10502bSJulia Lawall goto out_error; 3670f3eb5384SStefan Weinhuber } 3671d54cddb6SHeiko Carstens len_to_track_end = 0; 3672f3eb5384SStefan Weinhuber /* 3673f3eb5384SStefan Weinhuber * A tidaw can address 4k of memory, but must not cross page boundaries 3674f3eb5384SStefan Weinhuber * We can let the block layer handle this by setting 3675f3eb5384SStefan Weinhuber * blk_queue_segment_boundary to page boundaries and 3676f3eb5384SStefan Weinhuber * blk_max_segment_size to page size when setting up the request queue. 3677ef19298bSStefan Weinhuber * For write requests, a TIDAW must not cross track boundaries, because 3678ef19298bSStefan Weinhuber * we have to set the CBC flag on the last tidaw for each track. 3679f3eb5384SStefan Weinhuber */ 3680ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) { 3681ef19298bSStefan Weinhuber new_track = 1; 3682ef19298bSStefan Weinhuber recid = first_rec; 3683f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 36847988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 36857988613bSKent Overstreet seg_len = bv.bv_len; 3686ef19298bSStefan Weinhuber while (seg_len) { 3687ef19298bSStefan Weinhuber if (new_track) { 3688ef19298bSStefan Weinhuber trkid = recid; 3689ef19298bSStefan Weinhuber offs = sector_div(trkid, blk_per_trk); 3690ef19298bSStefan Weinhuber count_to_trk_end = blk_per_trk - offs; 3691ef19298bSStefan Weinhuber count = min((last_rec - recid + 1), 3692ef19298bSStefan Weinhuber (sector_t)count_to_trk_end); 3693ef19298bSStefan Weinhuber len_to_track_end = count * blksize; 3694ef19298bSStefan Weinhuber recid += count; 3695ef19298bSStefan Weinhuber new_track = 0; 3696f3eb5384SStefan Weinhuber } 3697ef19298bSStefan Weinhuber part_len = min(seg_len, len_to_track_end); 3698ef19298bSStefan Weinhuber seg_len -= part_len; 3699ef19298bSStefan Weinhuber len_to_track_end -= part_len; 3700ef19298bSStefan Weinhuber /* We need to end the tidaw at track end */ 3701ef19298bSStefan Weinhuber if (!len_to_track_end) { 3702ef19298bSStefan Weinhuber new_track = 1; 3703ef19298bSStefan Weinhuber tidaw_flags = TIDAW_FLAGS_INSERT_CBC; 3704ef19298bSStefan Weinhuber } else 3705ef19298bSStefan Weinhuber tidaw_flags = 0; 3706ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, 3707ef19298bSStefan Weinhuber dst, part_len); 3708cd10502bSJulia Lawall if (IS_ERR(last_tidaw)) { 3709cd10502bSJulia Lawall ret = -EINVAL; 3710cd10502bSJulia Lawall goto out_error; 3711cd10502bSJulia Lawall } 3712ef19298bSStefan Weinhuber dst += part_len; 3713ef19298bSStefan Weinhuber } 3714ef19298bSStefan Weinhuber } 3715ef19298bSStefan Weinhuber } else { 3716ef19298bSStefan Weinhuber rq_for_each_segment(bv, req, iter) { 37177988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 3718ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, 0x00, 37197988613bSKent Overstreet dst, bv.bv_len); 3720cd10502bSJulia Lawall if (IS_ERR(last_tidaw)) { 3721cd10502bSJulia Lawall ret = -EINVAL; 3722cd10502bSJulia Lawall goto out_error; 3723cd10502bSJulia Lawall } 3724ef19298bSStefan Weinhuber } 3725ef19298bSStefan Weinhuber } 3726ef19298bSStefan Weinhuber last_tidaw->flags |= TIDAW_FLAGS_LAST; 3727ef19298bSStefan Weinhuber last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; 3728f3eb5384SStefan Weinhuber itcw_finalize(itcw); 3729f3eb5384SStefan Weinhuber 3730f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 3731f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 3732f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3733ef19298bSStefan Weinhuber cqr->cpmode = 1; 3734f3eb5384SStefan Weinhuber cqr->startdev = startdev; 3735f3eb5384SStefan Weinhuber cqr->memdev = startdev; 3736f3eb5384SStefan Weinhuber cqr->block = block; 37377c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 3738a4d26c6aSStefan Weinhuber cqr->lpm = startdev->path_data.ppm; 37391f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 37401aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 3741f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 3742f3eb5384SStefan Weinhuber return cqr; 3743cd10502bSJulia Lawall out_error: 3744cd10502bSJulia Lawall dasd_sfree_request(cqr, startdev); 3745cd10502bSJulia Lawall return ERR_PTR(ret); 3746f3eb5384SStefan Weinhuber } 3747f3eb5384SStefan Weinhuber 3748f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 3749f3eb5384SStefan Weinhuber struct dasd_block *block, 3750f3eb5384SStefan Weinhuber struct request *req) 3751f3eb5384SStefan Weinhuber { 3752ef19298bSStefan Weinhuber int cmdrtd, cmdwtd; 3753f3eb5384SStefan Weinhuber int use_prefix; 3754ef19298bSStefan Weinhuber int fcx_multitrack; 375545b44d76SStefan Weinhuber struct dasd_eckd_private *private; 3756f3eb5384SStefan Weinhuber struct dasd_device *basedev; 3757f3eb5384SStefan Weinhuber sector_t first_rec, last_rec; 3758f3eb5384SStefan Weinhuber sector_t first_trk, last_trk; 3759f3eb5384SStefan Weinhuber unsigned int first_offs, last_offs; 3760f3eb5384SStefan Weinhuber unsigned int blk_per_trk, blksize; 3761f3eb5384SStefan Weinhuber int cdlspecial; 3762ef19298bSStefan Weinhuber unsigned int data_size; 3763f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 3764f3eb5384SStefan Weinhuber 3765f3eb5384SStefan Weinhuber basedev = block->base; 3766543691a4SSebastian Ott private = basedev->private; 3767f3eb5384SStefan Weinhuber 3768f3eb5384SStefan Weinhuber /* Calculate number of blocks/records per track. */ 3769f3eb5384SStefan Weinhuber blksize = block->bp_block; 3770f3eb5384SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 37716fca97a9SStefan Haberland if (blk_per_trk == 0) 37726fca97a9SStefan Haberland return ERR_PTR(-EINVAL); 3773f3eb5384SStefan Weinhuber /* Calculate record id of first and last block. */ 377483096ebfSTejun Heo first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; 3775f3eb5384SStefan Weinhuber first_offs = sector_div(first_trk, blk_per_trk); 3776f3eb5384SStefan Weinhuber last_rec = last_trk = 377783096ebfSTejun Heo (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 3778f3eb5384SStefan Weinhuber last_offs = sector_div(last_trk, blk_per_trk); 3779f3eb5384SStefan Weinhuber cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); 3780f3eb5384SStefan Weinhuber 3781ef19298bSStefan Weinhuber fcx_multitrack = private->features.feature[40] & 0x20; 3782ef19298bSStefan Weinhuber data_size = blk_rq_bytes(req); 378326a35f37SStefan Weinhuber if (data_size % blksize) 378426a35f37SStefan Weinhuber return ERR_PTR(-EINVAL); 3785ef19298bSStefan Weinhuber /* tpm write request add CBC data on each track boundary */ 3786ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 3787ef19298bSStefan Weinhuber data_size += (last_trk - first_trk) * 4; 3788f3eb5384SStefan Weinhuber 3789f3eb5384SStefan Weinhuber /* is read track data and write track data in command mode supported? */ 3790f3eb5384SStefan Weinhuber cmdrtd = private->features.feature[9] & 0x20; 3791f3eb5384SStefan Weinhuber cmdwtd = private->features.feature[12] & 0x40; 3792f3eb5384SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 3793f3eb5384SStefan Weinhuber 3794f3eb5384SStefan Weinhuber cqr = NULL; 3795f3eb5384SStefan Weinhuber if (cdlspecial || dasd_page_cache) { 3796f3eb5384SStefan Weinhuber /* do nothing, just fall through to the cmd mode single case */ 3797ef19298bSStefan Weinhuber } else if ((data_size <= private->fcx_max_data) 3798ef19298bSStefan Weinhuber && (fcx_multitrack || (first_trk == last_trk))) { 3799f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, 3800f3eb5384SStefan Weinhuber first_rec, last_rec, 3801f3eb5384SStefan Weinhuber first_trk, last_trk, 3802f3eb5384SStefan Weinhuber first_offs, last_offs, 3803f3eb5384SStefan Weinhuber blk_per_trk, blksize); 3804ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3805ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 3806f3eb5384SStefan Weinhuber cqr = NULL; 3807f3eb5384SStefan Weinhuber } else if (use_prefix && 3808f3eb5384SStefan Weinhuber (((rq_data_dir(req) == READ) && cmdrtd) || 3809f3eb5384SStefan Weinhuber ((rq_data_dir(req) == WRITE) && cmdwtd))) { 3810f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, 3811f3eb5384SStefan Weinhuber first_rec, last_rec, 3812f3eb5384SStefan Weinhuber first_trk, last_trk, 3813f3eb5384SStefan Weinhuber first_offs, last_offs, 3814f3eb5384SStefan Weinhuber blk_per_trk, blksize); 3815ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3816ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 3817f3eb5384SStefan Weinhuber cqr = NULL; 3818f3eb5384SStefan Weinhuber } 3819f3eb5384SStefan Weinhuber if (!cqr) 3820f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, 3821f3eb5384SStefan Weinhuber first_rec, last_rec, 3822f3eb5384SStefan Weinhuber first_trk, last_trk, 3823f3eb5384SStefan Weinhuber first_offs, last_offs, 3824f3eb5384SStefan Weinhuber blk_per_trk, blksize); 3825f3eb5384SStefan Weinhuber return cqr; 3826f3eb5384SStefan Weinhuber } 3827f3eb5384SStefan Weinhuber 3828e4dbb0f2SStefan Haberland static struct dasd_ccw_req *dasd_raw_build_cp(struct dasd_device *startdev, 3829e4dbb0f2SStefan Haberland struct dasd_block *block, 3830e4dbb0f2SStefan Haberland struct request *req) 3831e4dbb0f2SStefan Haberland { 3832e4dbb0f2SStefan Haberland unsigned long *idaws; 3833e4dbb0f2SStefan Haberland struct dasd_device *basedev; 3834e4dbb0f2SStefan Haberland struct dasd_ccw_req *cqr; 3835e4dbb0f2SStefan Haberland struct ccw1 *ccw; 3836e4dbb0f2SStefan Haberland struct req_iterator iter; 38377988613bSKent Overstreet struct bio_vec bv; 3838e4dbb0f2SStefan Haberland char *dst; 3839e4dbb0f2SStefan Haberland unsigned char cmd; 3840e4dbb0f2SStefan Haberland unsigned int trkcount; 3841e4dbb0f2SStefan Haberland unsigned int seg_len, len_to_track_end; 3842e4dbb0f2SStefan Haberland unsigned int first_offs; 3843e4dbb0f2SStefan Haberland unsigned int cidaw, cplength, datasize; 3844558b9ef0SStefan Weinhuber sector_t first_trk, last_trk, sectors; 3845558b9ef0SStefan Weinhuber sector_t start_padding_sectors, end_sector_offset, end_padding_sectors; 3846e4dbb0f2SStefan Haberland unsigned int pfx_datasize; 3847e4dbb0f2SStefan Haberland 3848e4dbb0f2SStefan Haberland /* 3849e4dbb0f2SStefan Haberland * raw track access needs to be mutiple of 64k and on 64k boundary 3850558b9ef0SStefan Weinhuber * For read requests we can fix an incorrect alignment by padding 3851558b9ef0SStefan Weinhuber * the request with dummy pages. 3852e4dbb0f2SStefan Haberland */ 3853558b9ef0SStefan Weinhuber start_padding_sectors = blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK; 3854558b9ef0SStefan Weinhuber end_sector_offset = (blk_rq_pos(req) + blk_rq_sectors(req)) % 3855558b9ef0SStefan Weinhuber DASD_RAW_SECTORS_PER_TRACK; 3856558b9ef0SStefan Weinhuber end_padding_sectors = (DASD_RAW_SECTORS_PER_TRACK - end_sector_offset) % 3857558b9ef0SStefan Weinhuber DASD_RAW_SECTORS_PER_TRACK; 3858558b9ef0SStefan Weinhuber basedev = block->base; 3859558b9ef0SStefan Weinhuber if ((start_padding_sectors || end_padding_sectors) && 3860558b9ef0SStefan Weinhuber (rq_data_dir(req) == WRITE)) { 3861558b9ef0SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 3862558b9ef0SStefan Weinhuber "raw write not track aligned (%lu,%lu) req %p", 3863558b9ef0SStefan Weinhuber start_padding_sectors, end_padding_sectors, req); 3864e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EINVAL); 3865e4dbb0f2SStefan Haberland goto out; 3866e4dbb0f2SStefan Haberland } 3867e4dbb0f2SStefan Haberland 3868e4dbb0f2SStefan Haberland first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; 3869e4dbb0f2SStefan Haberland last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / 3870e4dbb0f2SStefan Haberland DASD_RAW_SECTORS_PER_TRACK; 3871e4dbb0f2SStefan Haberland trkcount = last_trk - first_trk + 1; 3872e4dbb0f2SStefan Haberland first_offs = 0; 3873e4dbb0f2SStefan Haberland 3874e4dbb0f2SStefan Haberland if (rq_data_dir(req) == READ) 3875e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_READ_TRACK; 3876e4dbb0f2SStefan Haberland else if (rq_data_dir(req) == WRITE) 3877e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; 3878e4dbb0f2SStefan Haberland else { 3879e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EINVAL); 3880e4dbb0f2SStefan Haberland goto out; 3881e4dbb0f2SStefan Haberland } 3882e4dbb0f2SStefan Haberland 3883e4dbb0f2SStefan Haberland /* 3884e4dbb0f2SStefan Haberland * Raw track based I/O needs IDAWs for each page, 3885e4dbb0f2SStefan Haberland * and not just for 64 bit addresses. 3886e4dbb0f2SStefan Haberland */ 3887e4dbb0f2SStefan Haberland cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; 3888e4dbb0f2SStefan Haberland 3889e4dbb0f2SStefan Haberland /* 1x prefix + one read/write ccw per track */ 3890e4dbb0f2SStefan Haberland cplength = 1 + trkcount; 3891e4dbb0f2SStefan Haberland 3892e4dbb0f2SStefan Haberland /* 3893e4dbb0f2SStefan Haberland * struct PFX_eckd_data has up to 2 byte as extended parameter 3894e4dbb0f2SStefan Haberland * this is needed for write full track and has to be mentioned 389525985edcSLucas De Marchi * separately 3896e4dbb0f2SStefan Haberland * add 8 instead of 2 to keep 8 byte boundary 3897e4dbb0f2SStefan Haberland */ 3898e4dbb0f2SStefan Haberland pfx_datasize = sizeof(struct PFX_eckd_data) + 8; 3899e4dbb0f2SStefan Haberland 3900e4dbb0f2SStefan Haberland datasize = pfx_datasize + cidaw * sizeof(unsigned long long); 3901e4dbb0f2SStefan Haberland 3902e4dbb0f2SStefan Haberland /* Allocate the ccw request. */ 3903e4dbb0f2SStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 3904e4dbb0f2SStefan Haberland datasize, startdev); 3905e4dbb0f2SStefan Haberland if (IS_ERR(cqr)) 3906e4dbb0f2SStefan Haberland goto out; 3907e4dbb0f2SStefan Haberland ccw = cqr->cpaddr; 3908e4dbb0f2SStefan Haberland 3909e4dbb0f2SStefan Haberland if (prefix_LRE(ccw++, cqr->data, first_trk, last_trk, cmd, 3910e4dbb0f2SStefan Haberland basedev, startdev, 1 /* format */, first_offs + 1, 3911e4dbb0f2SStefan Haberland trkcount, 0, 0) == -EAGAIN) { 3912e4dbb0f2SStefan Haberland /* Clock not in sync and XRC is enabled. 3913e4dbb0f2SStefan Haberland * Try again later. 3914e4dbb0f2SStefan Haberland */ 3915e4dbb0f2SStefan Haberland dasd_sfree_request(cqr, startdev); 3916e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EAGAIN); 3917e4dbb0f2SStefan Haberland goto out; 3918e4dbb0f2SStefan Haberland } 3919e4dbb0f2SStefan Haberland 3920e4dbb0f2SStefan Haberland idaws = (unsigned long *)(cqr->data + pfx_datasize); 3921e4dbb0f2SStefan Haberland len_to_track_end = 0; 3922558b9ef0SStefan Weinhuber if (start_padding_sectors) { 3923558b9ef0SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 3924558b9ef0SStefan Weinhuber ccw->cmd_code = cmd; 3925558b9ef0SStefan Weinhuber /* maximum 3390 track size */ 3926558b9ef0SStefan Weinhuber ccw->count = 57326; 3927558b9ef0SStefan Weinhuber /* 64k map to one track */ 3928558b9ef0SStefan Weinhuber len_to_track_end = 65536 - start_padding_sectors * 512; 3929558b9ef0SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 3930558b9ef0SStefan Weinhuber ccw->flags |= CCW_FLAG_IDA; 3931558b9ef0SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3932558b9ef0SStefan Weinhuber ccw++; 3933558b9ef0SStefan Weinhuber for (sectors = 0; sectors < start_padding_sectors; sectors += 8) 3934558b9ef0SStefan Weinhuber idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 3935558b9ef0SStefan Weinhuber } 3936e4dbb0f2SStefan Haberland rq_for_each_segment(bv, req, iter) { 39377988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 39387988613bSKent Overstreet seg_len = bv.bv_len; 3939558b9ef0SStefan Weinhuber if (cmd == DASD_ECKD_CCW_READ_TRACK) 3940558b9ef0SStefan Weinhuber memset(dst, 0, seg_len); 3941e4dbb0f2SStefan Haberland if (!len_to_track_end) { 3942e4dbb0f2SStefan Haberland ccw[-1].flags |= CCW_FLAG_CC; 3943e4dbb0f2SStefan Haberland ccw->cmd_code = cmd; 3944e4dbb0f2SStefan Haberland /* maximum 3390 track size */ 3945e4dbb0f2SStefan Haberland ccw->count = 57326; 3946e4dbb0f2SStefan Haberland /* 64k map to one track */ 3947e4dbb0f2SStefan Haberland len_to_track_end = 65536; 3948e4dbb0f2SStefan Haberland ccw->cda = (__u32)(addr_t)idaws; 3949e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_IDA; 3950e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 3951e4dbb0f2SStefan Haberland ccw++; 3952e4dbb0f2SStefan Haberland } 3953e4dbb0f2SStefan Haberland len_to_track_end -= seg_len; 3954e4dbb0f2SStefan Haberland idaws = idal_create_words(idaws, dst, seg_len); 3955e4dbb0f2SStefan Haberland } 3956558b9ef0SStefan Weinhuber for (sectors = 0; sectors < end_padding_sectors; sectors += 8) 3957558b9ef0SStefan Weinhuber idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 3958e4dbb0f2SStefan Haberland if (blk_noretry_request(req) || 3959e4dbb0f2SStefan Haberland block->base->features & DASD_FEATURE_FAILFAST) 3960e4dbb0f2SStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3961e4dbb0f2SStefan Haberland cqr->startdev = startdev; 3962e4dbb0f2SStefan Haberland cqr->memdev = startdev; 3963e4dbb0f2SStefan Haberland cqr->block = block; 3964e4dbb0f2SStefan Haberland cqr->expires = startdev->default_expires * HZ; 3965e4dbb0f2SStefan Haberland cqr->lpm = startdev->path_data.ppm; 39661f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 39671aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 3968e4dbb0f2SStefan Haberland cqr->status = DASD_CQR_FILLED; 3969e4dbb0f2SStefan Haberland 3970e4dbb0f2SStefan Haberland if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN) 3971e4dbb0f2SStefan Haberland cqr = NULL; 3972e4dbb0f2SStefan Haberland out: 3973e4dbb0f2SStefan Haberland return cqr; 3974e4dbb0f2SStefan Haberland } 3975e4dbb0f2SStefan Haberland 3976e4dbb0f2SStefan Haberland 39771da177e4SLinus Torvalds static int 39781da177e4SLinus Torvalds dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 39791da177e4SLinus Torvalds { 39801da177e4SLinus Torvalds struct dasd_eckd_private *private; 39811da177e4SLinus Torvalds struct ccw1 *ccw; 39825705f702SNeilBrown struct req_iterator iter; 39837988613bSKent Overstreet struct bio_vec bv; 39841da177e4SLinus Torvalds char *dst, *cda; 39851da177e4SLinus Torvalds unsigned int blksize, blk_per_trk, off; 39861da177e4SLinus Torvalds sector_t recid; 39875705f702SNeilBrown int status; 39881da177e4SLinus Torvalds 39891da177e4SLinus Torvalds if (!dasd_page_cache) 39901da177e4SLinus Torvalds goto out; 3991543691a4SSebastian Ott private = cqr->block->base->private; 39928e09f215SStefan Weinhuber blksize = cqr->block->bp_block; 39931da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 399483096ebfSTejun Heo recid = blk_rq_pos(req) >> cqr->block->s2b_shift; 39951da177e4SLinus Torvalds ccw = cqr->cpaddr; 39961da177e4SLinus Torvalds /* Skip over define extent & locate record. */ 39971da177e4SLinus Torvalds ccw++; 39981da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 39991da177e4SLinus Torvalds ccw++; 40005705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 40017988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 40027988613bSKent Overstreet for (off = 0; off < bv.bv_len; off += blksize) { 40031da177e4SLinus Torvalds /* Skip locate record. */ 40041da177e4SLinus Torvalds if (private->uses_cdl && recid <= 2*blk_per_trk) 40051da177e4SLinus Torvalds ccw++; 40061da177e4SLinus Torvalds if (dst) { 40071da177e4SLinus Torvalds if (ccw->flags & CCW_FLAG_IDA) 40081da177e4SLinus Torvalds cda = *((char **)((addr_t) ccw->cda)); 40091da177e4SLinus Torvalds else 40101da177e4SLinus Torvalds cda = (char *)((addr_t) ccw->cda); 40111da177e4SLinus Torvalds if (dst != cda) { 40121da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 40137988613bSKent Overstreet memcpy(dst, cda, bv.bv_len); 40141da177e4SLinus Torvalds kmem_cache_free(dasd_page_cache, 40151da177e4SLinus Torvalds (void *)((addr_t)cda & PAGE_MASK)); 40161da177e4SLinus Torvalds } 40171da177e4SLinus Torvalds dst = NULL; 40181da177e4SLinus Torvalds } 40191da177e4SLinus Torvalds ccw++; 40201da177e4SLinus Torvalds recid++; 40211da177e4SLinus Torvalds } 40221da177e4SLinus Torvalds } 40231da177e4SLinus Torvalds out: 40241da177e4SLinus Torvalds status = cqr->status == DASD_CQR_DONE; 40258e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 40261da177e4SLinus Torvalds return status; 40271da177e4SLinus Torvalds } 40281da177e4SLinus Torvalds 40298e09f215SStefan Weinhuber /* 4030f3eb5384SStefan Weinhuber * Modify ccw/tcw in cqr so it can be started on a base device. 40318e09f215SStefan Weinhuber * 40328e09f215SStefan Weinhuber * Note that this is not enough to restart the cqr! 40338e09f215SStefan Weinhuber * Either reset cqr->startdev as well (summary unit check handling) 40348e09f215SStefan Weinhuber * or restart via separate cqr (as in ERP handling). 40358e09f215SStefan Weinhuber */ 40368e09f215SStefan Weinhuber void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 40378e09f215SStefan Weinhuber { 40388e09f215SStefan Weinhuber struct ccw1 *ccw; 40398e09f215SStefan Weinhuber struct PFX_eckd_data *pfxdata; 4040f3eb5384SStefan Weinhuber struct tcw *tcw; 4041f3eb5384SStefan Weinhuber struct tccb *tccb; 4042f3eb5384SStefan Weinhuber struct dcw *dcw; 40438e09f215SStefan Weinhuber 4044f3eb5384SStefan Weinhuber if (cqr->cpmode == 1) { 4045f3eb5384SStefan Weinhuber tcw = cqr->cpaddr; 4046f3eb5384SStefan Weinhuber tccb = tcw_get_tccb(tcw); 4047f3eb5384SStefan Weinhuber dcw = (struct dcw *)&tccb->tca[0]; 4048f3eb5384SStefan Weinhuber pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; 4049f3eb5384SStefan Weinhuber pfxdata->validity.verify_base = 0; 4050f3eb5384SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 4051f3eb5384SStefan Weinhuber } else { 40528e09f215SStefan Weinhuber ccw = cqr->cpaddr; 40538e09f215SStefan Weinhuber pfxdata = cqr->data; 40548e09f215SStefan Weinhuber if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 40558e09f215SStefan Weinhuber pfxdata->validity.verify_base = 0; 40568e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 40578e09f215SStefan Weinhuber } 40588e09f215SStefan Weinhuber } 4059f3eb5384SStefan Weinhuber } 40608e09f215SStefan Weinhuber 40618e09f215SStefan Weinhuber #define DASD_ECKD_CHANQ_MAX_SIZE 4 40628e09f215SStefan Weinhuber 40638e09f215SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 40648e09f215SStefan Weinhuber struct dasd_block *block, 40658e09f215SStefan Weinhuber struct request *req) 40668e09f215SStefan Weinhuber { 40678e09f215SStefan Weinhuber struct dasd_eckd_private *private; 40688e09f215SStefan Weinhuber struct dasd_device *startdev; 40698e09f215SStefan Weinhuber unsigned long flags; 40708e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 40718e09f215SStefan Weinhuber 40728e09f215SStefan Weinhuber startdev = dasd_alias_get_start_dev(base); 40738e09f215SStefan Weinhuber if (!startdev) 40748e09f215SStefan Weinhuber startdev = base; 4075543691a4SSebastian Ott private = startdev->private; 40768e09f215SStefan Weinhuber if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 40778e09f215SStefan Weinhuber return ERR_PTR(-EBUSY); 40788e09f215SStefan Weinhuber 40798e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 40808e09f215SStefan Weinhuber private->count++; 4081e4dbb0f2SStefan Haberland if ((base->features & DASD_FEATURE_USERAW)) 4082e4dbb0f2SStefan Haberland cqr = dasd_raw_build_cp(startdev, block, req); 4083e4dbb0f2SStefan Haberland else 40848e09f215SStefan Weinhuber cqr = dasd_eckd_build_cp(startdev, block, req); 40858e09f215SStefan Weinhuber if (IS_ERR(cqr)) 40868e09f215SStefan Weinhuber private->count--; 40878e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 40888e09f215SStefan Weinhuber return cqr; 40898e09f215SStefan Weinhuber } 40908e09f215SStefan Weinhuber 40918e09f215SStefan Weinhuber static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 40928e09f215SStefan Weinhuber struct request *req) 40938e09f215SStefan Weinhuber { 40948e09f215SStefan Weinhuber struct dasd_eckd_private *private; 40958e09f215SStefan Weinhuber unsigned long flags; 40968e09f215SStefan Weinhuber 40978e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 4098543691a4SSebastian Ott private = cqr->memdev->private; 40998e09f215SStefan Weinhuber private->count--; 41008e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 41018e09f215SStefan Weinhuber return dasd_eckd_free_cp(cqr, req); 41028e09f215SStefan Weinhuber } 41038e09f215SStefan Weinhuber 41041da177e4SLinus Torvalds static int 41051da177e4SLinus Torvalds dasd_eckd_fill_info(struct dasd_device * device, 41061da177e4SLinus Torvalds struct dasd_information2_t * info) 41071da177e4SLinus Torvalds { 4108543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 41091da177e4SLinus Torvalds 41101da177e4SLinus Torvalds info->label_block = 2; 41111da177e4SLinus Torvalds info->FBA_layout = private->uses_cdl ? 0 : 1; 41121da177e4SLinus Torvalds info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 4113543691a4SSebastian Ott info->characteristics_size = sizeof(private->rdc_data); 41141da177e4SLinus Torvalds memcpy(info->characteristics, &private->rdc_data, 4115543691a4SSebastian Ott sizeof(private->rdc_data)); 41164abb08c2SStefan Weinhuber info->confdata_size = min((unsigned long)private->conf_len, 41174abb08c2SStefan Weinhuber sizeof(info->configuration_data)); 41184abb08c2SStefan Weinhuber memcpy(info->configuration_data, private->conf_data, 41194abb08c2SStefan Weinhuber info->confdata_size); 41201da177e4SLinus Torvalds return 0; 41211da177e4SLinus Torvalds } 41221da177e4SLinus Torvalds 41231da177e4SLinus Torvalds /* 41241da177e4SLinus Torvalds * SECTION: ioctl functions for eckd devices. 41251da177e4SLinus Torvalds */ 41261da177e4SLinus Torvalds 41271da177e4SLinus Torvalds /* 41281da177e4SLinus Torvalds * Release device ioctl. 41291da177e4SLinus Torvalds * Buils a channel programm to releases a prior reserved 41301da177e4SLinus Torvalds * (see dasd_eckd_reserve) device. 41311da177e4SLinus Torvalds */ 41321da177e4SLinus Torvalds static int 41331107ccfbSChristoph Hellwig dasd_eckd_release(struct dasd_device *device) 41341da177e4SLinus Torvalds { 41351da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 41361da177e4SLinus Torvalds int rc; 4137f3eb5384SStefan Weinhuber struct ccw1 *ccw; 4138f932bceaSStefan Weinhuber int useglobal; 41391da177e4SLinus Torvalds 41401da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 41411da177e4SLinus Torvalds return -EACCES; 41421da177e4SLinus Torvalds 4143f932bceaSStefan Weinhuber useglobal = 0; 414468b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 41451da177e4SLinus Torvalds if (IS_ERR(cqr)) { 4146f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 4147f932bceaSStefan Weinhuber useglobal = 1; 4148f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 4149f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 4150f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 4151f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 4152f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 4153f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 4154f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 41551da177e4SLinus Torvalds } 4156f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 4157f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RELEASE; 4158f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4159f3eb5384SStefan Weinhuber ccw->count = 32; 4160f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 41618e09f215SStefan Weinhuber cqr->startdev = device; 41628e09f215SStefan Weinhuber cqr->memdev = device; 41631da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 41641c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4165336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 41661da177e4SLinus Torvalds cqr->expires = 2 * HZ; 41671aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 41681da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 41691da177e4SLinus Torvalds 41701da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 41715a27e60dSStefan Weinhuber if (!rc) 41725a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 41731da177e4SLinus Torvalds 4174f932bceaSStefan Weinhuber if (useglobal) 4175f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 4176f932bceaSStefan Weinhuber else 41778e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 41781da177e4SLinus Torvalds return rc; 41791da177e4SLinus Torvalds } 41801da177e4SLinus Torvalds 41811da177e4SLinus Torvalds /* 41821da177e4SLinus Torvalds * Reserve device ioctl. 41831da177e4SLinus Torvalds * Options are set to 'synchronous wait for interrupt' and 41841da177e4SLinus Torvalds * 'timeout the request'. This leads to a terminate IO if 41851da177e4SLinus Torvalds * the interrupt is outstanding for a certain time. 41861da177e4SLinus Torvalds */ 41871da177e4SLinus Torvalds static int 41881107ccfbSChristoph Hellwig dasd_eckd_reserve(struct dasd_device *device) 41891da177e4SLinus Torvalds { 41901da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 41911da177e4SLinus Torvalds int rc; 4192f3eb5384SStefan Weinhuber struct ccw1 *ccw; 4193f932bceaSStefan Weinhuber int useglobal; 41941da177e4SLinus Torvalds 41951da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 41961da177e4SLinus Torvalds return -EACCES; 41971da177e4SLinus Torvalds 4198f932bceaSStefan Weinhuber useglobal = 0; 419968b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 42001da177e4SLinus Torvalds if (IS_ERR(cqr)) { 4201f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 4202f932bceaSStefan Weinhuber useglobal = 1; 4203f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 4204f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 4205f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 4206f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 4207f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 4208f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 4209f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 42101da177e4SLinus Torvalds } 4211f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 4212f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RESERVE; 4213f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4214f3eb5384SStefan Weinhuber ccw->count = 32; 4215f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 42168e09f215SStefan Weinhuber cqr->startdev = device; 42178e09f215SStefan Weinhuber cqr->memdev = device; 42181da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 42191c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4220336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 42211da177e4SLinus Torvalds cqr->expires = 2 * HZ; 42221aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 42231da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 42241da177e4SLinus Torvalds 42251da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 42265a27e60dSStefan Weinhuber if (!rc) 42275a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 42281da177e4SLinus Torvalds 4229f932bceaSStefan Weinhuber if (useglobal) 4230f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 4231f932bceaSStefan Weinhuber else 42328e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 42331da177e4SLinus Torvalds return rc; 42341da177e4SLinus Torvalds } 42351da177e4SLinus Torvalds 42361da177e4SLinus Torvalds /* 42371da177e4SLinus Torvalds * Steal lock ioctl - unconditional reserve device. 42381da177e4SLinus Torvalds * Buils a channel programm to break a device's reservation. 42391da177e4SLinus Torvalds * (unconditional reserve) 42401da177e4SLinus Torvalds */ 42411da177e4SLinus Torvalds static int 42421107ccfbSChristoph Hellwig dasd_eckd_steal_lock(struct dasd_device *device) 42431da177e4SLinus Torvalds { 42441da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 42451da177e4SLinus Torvalds int rc; 4246f3eb5384SStefan Weinhuber struct ccw1 *ccw; 4247f932bceaSStefan Weinhuber int useglobal; 42481da177e4SLinus Torvalds 42491da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 42501da177e4SLinus Torvalds return -EACCES; 42511da177e4SLinus Torvalds 4252f932bceaSStefan Weinhuber useglobal = 0; 425368b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 42541da177e4SLinus Torvalds if (IS_ERR(cqr)) { 4255f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 4256f932bceaSStefan Weinhuber useglobal = 1; 4257f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 4258f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 4259f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 4260f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 4261f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 4262f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 4263f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 42641da177e4SLinus Torvalds } 4265f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 4266f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SLCK; 4267f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4268f3eb5384SStefan Weinhuber ccw->count = 32; 4269f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 42708e09f215SStefan Weinhuber cqr->startdev = device; 42718e09f215SStefan Weinhuber cqr->memdev = device; 42721da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 42731c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4274336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 42751da177e4SLinus Torvalds cqr->expires = 2 * HZ; 42761aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 42771da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 42781da177e4SLinus Torvalds 42791da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 42805a27e60dSStefan Weinhuber if (!rc) 42815a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 42821da177e4SLinus Torvalds 4283f932bceaSStefan Weinhuber if (useglobal) 4284f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 4285f932bceaSStefan Weinhuber else 42868e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 42871da177e4SLinus Torvalds return rc; 42881da177e4SLinus Torvalds } 42891da177e4SLinus Torvalds 42901da177e4SLinus Torvalds /* 4291196339f1SStefan Weinhuber * SNID - Sense Path Group ID 4292196339f1SStefan Weinhuber * This ioctl may be used in situations where I/O is stalled due to 4293196339f1SStefan Weinhuber * a reserve, so if the normal dasd_smalloc_request fails, we use the 4294196339f1SStefan Weinhuber * preallocated dasd_reserve_req. 4295196339f1SStefan Weinhuber */ 4296196339f1SStefan Weinhuber static int dasd_eckd_snid(struct dasd_device *device, 4297196339f1SStefan Weinhuber void __user *argp) 4298196339f1SStefan Weinhuber { 4299196339f1SStefan Weinhuber struct dasd_ccw_req *cqr; 4300196339f1SStefan Weinhuber int rc; 4301196339f1SStefan Weinhuber struct ccw1 *ccw; 4302196339f1SStefan Weinhuber int useglobal; 4303196339f1SStefan Weinhuber struct dasd_snid_ioctl_data usrparm; 4304196339f1SStefan Weinhuber 4305196339f1SStefan Weinhuber if (!capable(CAP_SYS_ADMIN)) 4306196339f1SStefan Weinhuber return -EACCES; 4307196339f1SStefan Weinhuber 4308196339f1SStefan Weinhuber if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 4309196339f1SStefan Weinhuber return -EFAULT; 4310196339f1SStefan Weinhuber 4311196339f1SStefan Weinhuber useglobal = 0; 4312196339f1SStefan Weinhuber cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 4313196339f1SStefan Weinhuber sizeof(struct dasd_snid_data), device); 4314196339f1SStefan Weinhuber if (IS_ERR(cqr)) { 4315196339f1SStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 4316196339f1SStefan Weinhuber useglobal = 1; 4317196339f1SStefan Weinhuber cqr = &dasd_reserve_req->cqr; 4318196339f1SStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 4319196339f1SStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 4320196339f1SStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 4321196339f1SStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 4322196339f1SStefan Weinhuber cqr->data = &dasd_reserve_req->data; 4323196339f1SStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 4324196339f1SStefan Weinhuber } 4325196339f1SStefan Weinhuber ccw = cqr->cpaddr; 4326196339f1SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SNID; 4327196339f1SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4328196339f1SStefan Weinhuber ccw->count = 12; 4329196339f1SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 4330196339f1SStefan Weinhuber cqr->startdev = device; 4331196339f1SStefan Weinhuber cqr->memdev = device; 4332196339f1SStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 4333196339f1SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 43345a27e60dSStefan Weinhuber set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 4335196339f1SStefan Weinhuber cqr->retries = 5; 4336196339f1SStefan Weinhuber cqr->expires = 10 * HZ; 43371aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 4338196339f1SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 4339196339f1SStefan Weinhuber cqr->lpm = usrparm.path_mask; 4340196339f1SStefan Weinhuber 4341196339f1SStefan Weinhuber rc = dasd_sleep_on_immediatly(cqr); 4342196339f1SStefan Weinhuber /* verify that I/O processing didn't modify the path mask */ 4343196339f1SStefan Weinhuber if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) 4344196339f1SStefan Weinhuber rc = -EIO; 4345196339f1SStefan Weinhuber if (!rc) { 4346196339f1SStefan Weinhuber usrparm.data = *((struct dasd_snid_data *)cqr->data); 4347196339f1SStefan Weinhuber if (copy_to_user(argp, &usrparm, sizeof(usrparm))) 4348196339f1SStefan Weinhuber rc = -EFAULT; 4349196339f1SStefan Weinhuber } 4350196339f1SStefan Weinhuber 4351196339f1SStefan Weinhuber if (useglobal) 4352196339f1SStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 4353196339f1SStefan Weinhuber else 4354196339f1SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 4355196339f1SStefan Weinhuber return rc; 4356196339f1SStefan Weinhuber } 4357196339f1SStefan Weinhuber 4358196339f1SStefan Weinhuber /* 43591da177e4SLinus Torvalds * Read performance statistics 43601da177e4SLinus Torvalds */ 43611da177e4SLinus Torvalds static int 43621107ccfbSChristoph Hellwig dasd_eckd_performance(struct dasd_device *device, void __user *argp) 43631da177e4SLinus Torvalds { 43641da177e4SLinus Torvalds struct dasd_psf_prssd_data *prssdp; 43651da177e4SLinus Torvalds struct dasd_rssd_perf_stats_t *stats; 43661da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 43671da177e4SLinus Torvalds struct ccw1 *ccw; 43681da177e4SLinus Torvalds int rc; 43691da177e4SLinus Torvalds 437068b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 43711da177e4SLinus Torvalds (sizeof(struct dasd_psf_prssd_data) + 43721da177e4SLinus Torvalds sizeof(struct dasd_rssd_perf_stats_t)), 43731da177e4SLinus Torvalds device); 43741da177e4SLinus Torvalds if (IS_ERR(cqr)) { 4375fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 43761da177e4SLinus Torvalds "Could not allocate initialization request"); 43771da177e4SLinus Torvalds return PTR_ERR(cqr); 43781da177e4SLinus Torvalds } 43798e09f215SStefan Weinhuber cqr->startdev = device; 43808e09f215SStefan Weinhuber cqr->memdev = device; 43811da177e4SLinus Torvalds cqr->retries = 0; 4382eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 43831da177e4SLinus Torvalds cqr->expires = 10 * HZ; 43841da177e4SLinus Torvalds 43851da177e4SLinus Torvalds /* Prepare for Read Subsystem Data */ 43861da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 43871da177e4SLinus Torvalds memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 43881da177e4SLinus Torvalds prssdp->order = PSF_ORDER_PRSSD; 43895d67d164SJoe Perches prssdp->suborder = 0x01; /* Performance Statistics */ 43901da177e4SLinus Torvalds prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 43911da177e4SLinus Torvalds 43921da177e4SLinus Torvalds ccw = cqr->cpaddr; 43931da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_PSF; 43941da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_psf_prssd_data); 43951da177e4SLinus Torvalds ccw->flags |= CCW_FLAG_CC; 43961da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) prssdp; 43971da177e4SLinus Torvalds 43981da177e4SLinus Torvalds /* Read Subsystem Data - Performance Statistics */ 43991da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 44001da177e4SLinus Torvalds memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 44011da177e4SLinus Torvalds 44021da177e4SLinus Torvalds ccw++; 44031da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_RSSD; 44041da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 44051da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) stats; 44061da177e4SLinus Torvalds 44071aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 44081da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 44091da177e4SLinus Torvalds rc = dasd_sleep_on(cqr); 44101da177e4SLinus Torvalds if (rc == 0) { 44111da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 44121da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 44131107ccfbSChristoph Hellwig if (copy_to_user(argp, stats, 44141107ccfbSChristoph Hellwig sizeof(struct dasd_rssd_perf_stats_t))) 44151107ccfbSChristoph Hellwig rc = -EFAULT; 44161da177e4SLinus Torvalds } 44178e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 44181da177e4SLinus Torvalds return rc; 44191da177e4SLinus Torvalds } 44201da177e4SLinus Torvalds 44211da177e4SLinus Torvalds /* 44221da177e4SLinus Torvalds * Get attributes (cache operations) 44231da177e4SLinus Torvalds * Returnes the cache attributes used in Define Extend (DE). 44241da177e4SLinus Torvalds */ 44251da177e4SLinus Torvalds static int 44261107ccfbSChristoph Hellwig dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 44271da177e4SLinus Torvalds { 4428543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 44291107ccfbSChristoph Hellwig struct attrib_data_t attrib = private->attrib; 44301da177e4SLinus Torvalds int rc; 44311da177e4SLinus Torvalds 44321da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 44331da177e4SLinus Torvalds return -EACCES; 44341107ccfbSChristoph Hellwig if (!argp) 44351da177e4SLinus Torvalds return -EINVAL; 44361da177e4SLinus Torvalds 44371107ccfbSChristoph Hellwig rc = 0; 44381107ccfbSChristoph Hellwig if (copy_to_user(argp, (long *) &attrib, 44391107ccfbSChristoph Hellwig sizeof(struct attrib_data_t))) 44401107ccfbSChristoph Hellwig rc = -EFAULT; 44411da177e4SLinus Torvalds 44421da177e4SLinus Torvalds return rc; 44431da177e4SLinus Torvalds } 44441da177e4SLinus Torvalds 44451da177e4SLinus Torvalds /* 44461da177e4SLinus Torvalds * Set attributes (cache operations) 44471da177e4SLinus Torvalds * Stores the attributes for cache operation to be used in Define Extend (DE). 44481da177e4SLinus Torvalds */ 44491da177e4SLinus Torvalds static int 44501107ccfbSChristoph Hellwig dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 44511da177e4SLinus Torvalds { 4452543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 44531da177e4SLinus Torvalds struct attrib_data_t attrib; 44541da177e4SLinus Torvalds 44551da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 44561da177e4SLinus Torvalds return -EACCES; 44571107ccfbSChristoph Hellwig if (!argp) 44581da177e4SLinus Torvalds return -EINVAL; 44591da177e4SLinus Torvalds 44601107ccfbSChristoph Hellwig if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 44611da177e4SLinus Torvalds return -EFAULT; 44621da177e4SLinus Torvalds private->attrib = attrib; 44631da177e4SLinus Torvalds 4464fc19f381SStefan Haberland dev_info(&device->cdev->dev, 4465fc19f381SStefan Haberland "The DASD cache mode was set to %x (%i cylinder prestage)\n", 44661da177e4SLinus Torvalds private->attrib.operation, private->attrib.nr_cyl); 44671da177e4SLinus Torvalds return 0; 44681da177e4SLinus Torvalds } 44691da177e4SLinus Torvalds 4470ab1d848fSNigel Hislop /* 4471ab1d848fSNigel Hislop * Issue syscall I/O to EMC Symmetrix array. 4472ab1d848fSNigel Hislop * CCWs are PSF and RSSD 4473ab1d848fSNigel Hislop */ 4474ab1d848fSNigel Hislop static int dasd_symm_io(struct dasd_device *device, void __user *argp) 4475ab1d848fSNigel Hislop { 4476ab1d848fSNigel Hislop struct dasd_symmio_parms usrparm; 4477ab1d848fSNigel Hislop char *psf_data, *rssd_result; 4478ab1d848fSNigel Hislop struct dasd_ccw_req *cqr; 4479ab1d848fSNigel Hislop struct ccw1 *ccw; 448052898025SNigel Hislop char psf0, psf1; 4481ab1d848fSNigel Hislop int rc; 4482ab1d848fSNigel Hislop 448352898025SNigel Hislop if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) 448452898025SNigel Hislop return -EACCES; 448552898025SNigel Hislop psf0 = psf1 = 0; 448652898025SNigel Hislop 4487ab1d848fSNigel Hislop /* Copy parms from caller */ 4488ab1d848fSNigel Hislop rc = -EFAULT; 4489ab1d848fSNigel Hislop if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 4490ab1d848fSNigel Hislop goto out; 449192d62891SHeiko Carstens if (is_compat_task()) { 4492ab1d848fSNigel Hislop /* Make sure pointers are sane even on 31 bit. */ 4493ab1d848fSNigel Hislop rc = -EINVAL; 4494f8b06859SHeiko Carstens if ((usrparm.psf_data >> 32) != 0) 4495ab1d848fSNigel Hislop goto out; 4496f8b06859SHeiko Carstens if ((usrparm.rssd_result >> 32) != 0) 4497f8b06859SHeiko Carstens goto out; 4498f8b06859SHeiko Carstens usrparm.psf_data &= 0x7fffffffULL; 4499f8b06859SHeiko Carstens usrparm.rssd_result &= 0x7fffffffULL; 4500ab1d848fSNigel Hislop } 4501ab1d848fSNigel Hislop /* alloc I/O data area */ 4502ab1d848fSNigel Hislop psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 4503ab1d848fSNigel Hislop rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 4504ab1d848fSNigel Hislop if (!psf_data || !rssd_result) { 4505ab1d848fSNigel Hislop rc = -ENOMEM; 4506ab1d848fSNigel Hislop goto out_free; 4507ab1d848fSNigel Hislop } 4508ab1d848fSNigel Hislop 4509ab1d848fSNigel Hislop /* get syscall header from user space */ 4510ab1d848fSNigel Hislop rc = -EFAULT; 4511ab1d848fSNigel Hislop if (copy_from_user(psf_data, 4512ab1d848fSNigel Hislop (void __user *)(unsigned long) usrparm.psf_data, 4513ab1d848fSNigel Hislop usrparm.psf_data_len)) 4514ab1d848fSNigel Hislop goto out_free; 451552898025SNigel Hislop psf0 = psf_data[0]; 451652898025SNigel Hislop psf1 = psf_data[1]; 4517ab1d848fSNigel Hislop 4518ab1d848fSNigel Hislop /* setup CCWs for PSF + RSSD */ 451968b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device); 4520ab1d848fSNigel Hislop if (IS_ERR(cqr)) { 4521fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 4522ab1d848fSNigel Hislop "Could not allocate initialization request"); 4523ab1d848fSNigel Hislop rc = PTR_ERR(cqr); 4524ab1d848fSNigel Hislop goto out_free; 4525ab1d848fSNigel Hislop } 4526ab1d848fSNigel Hislop 4527ab1d848fSNigel Hislop cqr->startdev = device; 4528ab1d848fSNigel Hislop cqr->memdev = device; 4529ab1d848fSNigel Hislop cqr->retries = 3; 4530ab1d848fSNigel Hislop cqr->expires = 10 * HZ; 45311aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 4532ab1d848fSNigel Hislop cqr->status = DASD_CQR_FILLED; 4533ab1d848fSNigel Hislop 4534ab1d848fSNigel Hislop /* Build the ccws */ 4535ab1d848fSNigel Hislop ccw = cqr->cpaddr; 4536ab1d848fSNigel Hislop 4537ab1d848fSNigel Hislop /* PSF ccw */ 4538ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_PSF; 4539ab1d848fSNigel Hislop ccw->count = usrparm.psf_data_len; 4540ab1d848fSNigel Hislop ccw->flags |= CCW_FLAG_CC; 4541ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) psf_data; 4542ab1d848fSNigel Hislop 4543ab1d848fSNigel Hislop ccw++; 4544ab1d848fSNigel Hislop 4545ab1d848fSNigel Hislop /* RSSD ccw */ 4546ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_RSSD; 4547ab1d848fSNigel Hislop ccw->count = usrparm.rssd_result_len; 4548ab1d848fSNigel Hislop ccw->flags = CCW_FLAG_SLI ; 4549ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) rssd_result; 4550ab1d848fSNigel Hislop 4551ab1d848fSNigel Hislop rc = dasd_sleep_on(cqr); 4552ab1d848fSNigel Hislop if (rc) 4553ab1d848fSNigel Hislop goto out_sfree; 4554ab1d848fSNigel Hislop 4555ab1d848fSNigel Hislop rc = -EFAULT; 4556ab1d848fSNigel Hislop if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 4557ab1d848fSNigel Hislop rssd_result, usrparm.rssd_result_len)) 4558ab1d848fSNigel Hislop goto out_sfree; 4559ab1d848fSNigel Hislop rc = 0; 4560ab1d848fSNigel Hislop 4561ab1d848fSNigel Hislop out_sfree: 4562ab1d848fSNigel Hislop dasd_sfree_request(cqr, cqr->memdev); 4563ab1d848fSNigel Hislop out_free: 4564ab1d848fSNigel Hislop kfree(rssd_result); 4565ab1d848fSNigel Hislop kfree(psf_data); 4566ab1d848fSNigel Hislop out: 456752898025SNigel Hislop DBF_DEV_EVENT(DBF_WARNING, device, 456852898025SNigel Hislop "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", 456952898025SNigel Hislop (int) psf0, (int) psf1, rc); 4570ab1d848fSNigel Hislop return rc; 4571ab1d848fSNigel Hislop } 4572ab1d848fSNigel Hislop 45731107ccfbSChristoph Hellwig static int 45748e09f215SStefan Weinhuber dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 45751107ccfbSChristoph Hellwig { 45768e09f215SStefan Weinhuber struct dasd_device *device = block->base; 45778e09f215SStefan Weinhuber 45781107ccfbSChristoph Hellwig switch (cmd) { 45791107ccfbSChristoph Hellwig case BIODASDGATTR: 45801107ccfbSChristoph Hellwig return dasd_eckd_get_attrib(device, argp); 45811107ccfbSChristoph Hellwig case BIODASDSATTR: 45821107ccfbSChristoph Hellwig return dasd_eckd_set_attrib(device, argp); 45831107ccfbSChristoph Hellwig case BIODASDPSRD: 45841107ccfbSChristoph Hellwig return dasd_eckd_performance(device, argp); 45851107ccfbSChristoph Hellwig case BIODASDRLSE: 45861107ccfbSChristoph Hellwig return dasd_eckd_release(device); 45871107ccfbSChristoph Hellwig case BIODASDRSRV: 45881107ccfbSChristoph Hellwig return dasd_eckd_reserve(device); 45891107ccfbSChristoph Hellwig case BIODASDSLCK: 45901107ccfbSChristoph Hellwig return dasd_eckd_steal_lock(device); 4591196339f1SStefan Weinhuber case BIODASDSNID: 4592196339f1SStefan Weinhuber return dasd_eckd_snid(device, argp); 4593ab1d848fSNigel Hislop case BIODASDSYMMIO: 4594ab1d848fSNigel Hislop return dasd_symm_io(device, argp); 45951107ccfbSChristoph Hellwig default: 45966b79d14eSHeiko Carstens return -ENOTTY; 45971107ccfbSChristoph Hellwig } 45981107ccfbSChristoph Hellwig } 45991107ccfbSChristoph Hellwig 46001da177e4SLinus Torvalds /* 4601445b5b49SHorst Hummel * Dump the range of CCWs into 'page' buffer 4602445b5b49SHorst Hummel * and return number of printed chars. 4603445b5b49SHorst Hummel */ 46044d284cacSHeiko Carstens static int 4605445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 4606445b5b49SHorst Hummel { 4607445b5b49SHorst Hummel int len, count; 4608445b5b49SHorst Hummel char *datap; 4609445b5b49SHorst Hummel 4610445b5b49SHorst Hummel len = 0; 4611445b5b49SHorst Hummel while (from <= to) { 4612773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4613445b5b49SHorst Hummel " CCW %p: %08X %08X DAT:", 4614445b5b49SHorst Hummel from, ((int *) from)[0], ((int *) from)[1]); 4615445b5b49SHorst Hummel 4616445b5b49SHorst Hummel /* get pointer to data (consider IDALs) */ 4617445b5b49SHorst Hummel if (from->flags & CCW_FLAG_IDA) 4618445b5b49SHorst Hummel datap = (char *) *((addr_t *) (addr_t) from->cda); 4619445b5b49SHorst Hummel else 4620445b5b49SHorst Hummel datap = (char *) ((addr_t) from->cda); 4621445b5b49SHorst Hummel 4622445b5b49SHorst Hummel /* dump data (max 32 bytes) */ 4623445b5b49SHorst Hummel for (count = 0; count < from->count && count < 32; count++) { 4624445b5b49SHorst Hummel if (count % 8 == 0) len += sprintf(page + len, " "); 4625445b5b49SHorst Hummel if (count % 4 == 0) len += sprintf(page + len, " "); 4626445b5b49SHorst Hummel len += sprintf(page + len, "%02x", datap[count]); 4627445b5b49SHorst Hummel } 4628445b5b49SHorst Hummel len += sprintf(page + len, "\n"); 4629445b5b49SHorst Hummel from++; 4630445b5b49SHorst Hummel } 4631445b5b49SHorst Hummel return len; 4632445b5b49SHorst Hummel } 4633445b5b49SHorst Hummel 4634fc19f381SStefan Haberland static void 4635aeec92caSStefan Haberland dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 4636aeec92caSStefan Haberland char *reason) 4637fc19f381SStefan Haberland { 4638fc19f381SStefan Haberland u64 *sense; 4639a5a0061fSStefan Weinhuber u64 *stat; 4640fc19f381SStefan Haberland 4641aeec92caSStefan Haberland sense = (u64 *) dasd_get_sense(irb); 4642a5a0061fSStefan Weinhuber stat = (u64 *) &irb->scsw; 4643fc19f381SStefan Haberland if (sense) { 4644a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " 4645a5a0061fSStefan Weinhuber "%016llx %016llx %016llx %016llx", 4646a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 4647ed3640b2SStefan Haberland sense[0], sense[1], sense[2], sense[3]); 4648fc19f381SStefan Haberland } else { 4649a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", 4650a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 4651a5a0061fSStefan Weinhuber "NO VALID SENSE"); 4652fc19f381SStefan Haberland } 4653fc19f381SStefan Haberland } 4654fc19f381SStefan Haberland 4655445b5b49SHorst Hummel /* 46561da177e4SLinus Torvalds * Print sense data and related channel program. 46571da177e4SLinus Torvalds * Parts are printed because printk buffer is only 1024 bytes. 46581da177e4SLinus Torvalds */ 4659f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 46608e09f215SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 46611da177e4SLinus Torvalds { 46621da177e4SLinus Torvalds char *page; 4663445b5b49SHorst Hummel struct ccw1 *first, *last, *fail, *from, *to; 4664445b5b49SHorst Hummel int len, sl, sct; 46651da177e4SLinus Torvalds 46661da177e4SLinus Torvalds page = (char *) get_zeroed_page(GFP_ATOMIC); 46671da177e4SLinus Torvalds if (page == NULL) { 4668fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 4669fc19f381SStefan Haberland "No memory to dump sense data\n"); 46701da177e4SLinus Torvalds return; 46711da177e4SLinus Torvalds } 4672445b5b49SHorst Hummel /* dump the sense data */ 4673773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 46741da177e4SLinus Torvalds " I/O status report for device %s:\n", 46752a0217d5SKay Sievers dev_name(&device->cdev->dev)); 4676773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4677a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 4678a5a0061fSStefan Weinhuber "CS:%02X RC:%d\n", 4679a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 4680a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 4681a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 4682a5a0061fSStefan Weinhuber req ? req->intrc : 0); 4683773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 46841da177e4SLinus Torvalds " device %s: Failing CCW: %p\n", 46852a0217d5SKay Sievers dev_name(&device->cdev->dev), 468623d805b6SPeter Oberparleiter (void *) (addr_t) irb->scsw.cmd.cpa); 46871da177e4SLinus Torvalds if (irb->esw.esw0.erw.cons) { 46881da177e4SLinus Torvalds for (sl = 0; sl < 4; sl++) { 4689773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 46901da177e4SLinus Torvalds " Sense(hex) %2d-%2d:", 46911da177e4SLinus Torvalds (8 * sl), ((8 * sl) + 7)); 46921da177e4SLinus Torvalds 46931da177e4SLinus Torvalds for (sct = 0; sct < 8; sct++) { 46941da177e4SLinus Torvalds len += sprintf(page + len, " %02x", 46951da177e4SLinus Torvalds irb->ecw[8 * sl + sct]); 46961da177e4SLinus Torvalds } 46971da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 46981da177e4SLinus Torvalds } 46991da177e4SLinus Torvalds 47001da177e4SLinus Torvalds if (irb->ecw[27] & DASD_SENSE_BIT_0) { 47011da177e4SLinus Torvalds /* 24 Byte Sense Data */ 4702773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 47031da177e4SLinus Torvalds " 24 Byte: %x MSG %x, " 47041da177e4SLinus Torvalds "%s MSGb to SYSOP\n", 47051da177e4SLinus Torvalds irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 47061da177e4SLinus Torvalds irb->ecw[1] & 0x10 ? "" : "no"); 47071da177e4SLinus Torvalds } else { 47081da177e4SLinus Torvalds /* 32 Byte Sense Data */ 4709773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 47101da177e4SLinus Torvalds " 32 Byte: Format: %x " 47111da177e4SLinus Torvalds "Exception class %x\n", 47121da177e4SLinus Torvalds irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 47131da177e4SLinus Torvalds } 47141da177e4SLinus Torvalds } else { 4715773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 47161da177e4SLinus Torvalds " SORRY - NO VALID SENSE AVAILABLE\n"); 47171da177e4SLinus Torvalds } 4718773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 47191da177e4SLinus Torvalds 47208e09f215SStefan Weinhuber if (req) { 47218e09f215SStefan Weinhuber /* req == NULL for unsolicited interrupts */ 4722445b5b49SHorst Hummel /* dump the Channel Program (max 140 Bytes per line) */ 4723445b5b49SHorst Hummel /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 4724445b5b49SHorst Hummel first = req->cpaddr; 4725445b5b49SHorst Hummel for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 4726445b5b49SHorst Hummel to = min(first + 6, last); 4727773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 47281da177e4SLinus Torvalds " Related CP in req: %p\n", req); 4729445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(first, to, page + len); 4730773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 47311da177e4SLinus Torvalds 4732445b5b49SHorst Hummel /* print failing CCW area (maximum 4) */ 4733445b5b49SHorst Hummel /* scsw->cda is either valid or zero */ 47341da177e4SLinus Torvalds len = 0; 4735445b5b49SHorst Hummel from = ++to; 473623d805b6SPeter Oberparleiter fail = (struct ccw1 *)(addr_t) 473723d805b6SPeter Oberparleiter irb->scsw.cmd.cpa; /* failing CCW */ 4738445b5b49SHorst Hummel if (from < fail - 2) { 4739445b5b49SHorst Hummel from = fail - 2; /* there is a gap - print header */ 4740773bab4aSSebastian Ott len += sprintf(page, PRINTK_HEADER "......\n"); 47411da177e4SLinus Torvalds } 4742445b5b49SHorst Hummel to = min(fail + 1, last); 4743445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, to, page + len); 47441da177e4SLinus Torvalds 4745445b5b49SHorst Hummel /* print last CCWs (maximum 2) */ 4746445b5b49SHorst Hummel from = max(from, ++to); 4747445b5b49SHorst Hummel if (from < last - 1) { 4748445b5b49SHorst Hummel from = last - 1; /* there is a gap - print header */ 4749773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER "......\n"); 47501da177e4SLinus Torvalds } 4751445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, last, page + len); 47521da177e4SLinus Torvalds if (len > 0) 4753773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 47548e09f215SStefan Weinhuber } 47551da177e4SLinus Torvalds free_page((unsigned long) page); 47561da177e4SLinus Torvalds } 47571da177e4SLinus Torvalds 4758f3eb5384SStefan Weinhuber 4759f3eb5384SStefan Weinhuber /* 4760f3eb5384SStefan Weinhuber * Print sense data from a tcw. 4761f3eb5384SStefan Weinhuber */ 4762f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 4763f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 4764f3eb5384SStefan Weinhuber { 4765f3eb5384SStefan Weinhuber char *page; 4766f3eb5384SStefan Weinhuber int len, sl, sct, residual; 4767f3eb5384SStefan Weinhuber struct tsb *tsb; 4768ef19298bSStefan Weinhuber u8 *sense, *rcq; 4769f3eb5384SStefan Weinhuber 4770f3eb5384SStefan Weinhuber page = (char *) get_zeroed_page(GFP_ATOMIC); 4771f3eb5384SStefan Weinhuber if (page == NULL) { 4772fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, " %s", 4773f3eb5384SStefan Weinhuber "No memory to dump sense data"); 4774f3eb5384SStefan Weinhuber return; 4775f3eb5384SStefan Weinhuber } 4776f3eb5384SStefan Weinhuber /* dump the sense data */ 4777773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 4778f3eb5384SStefan Weinhuber " I/O status report for device %s:\n", 4779f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev)); 4780773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4781a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 4782a5a0061fSStefan Weinhuber "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", 4783a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 4784a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 4785a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 4786a5a0061fSStefan Weinhuber irb->scsw.tm.fcxs, irb->scsw.tm.schxs, 4787a5a0061fSStefan Weinhuber req ? req->intrc : 0); 4788773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4789f3eb5384SStefan Weinhuber " device %s: Failing TCW: %p\n", 4790f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev), 4791f3eb5384SStefan Weinhuber (void *) (addr_t) irb->scsw.tm.tcw); 4792f3eb5384SStefan Weinhuber 4793f3eb5384SStefan Weinhuber tsb = NULL; 4794f3eb5384SStefan Weinhuber sense = NULL; 4795a5a0061fSStefan Weinhuber if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) 4796f3eb5384SStefan Weinhuber tsb = tcw_get_tsb( 4797f3eb5384SStefan Weinhuber (struct tcw *)(unsigned long)irb->scsw.tm.tcw); 4798f3eb5384SStefan Weinhuber 4799b8fde722SStefan Haberland if (tsb) { 4800773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4801f3eb5384SStefan Weinhuber " tsb->length %d\n", tsb->length); 4802773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4803f3eb5384SStefan Weinhuber " tsb->flags %x\n", tsb->flags); 4804773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4805f3eb5384SStefan Weinhuber " tsb->dcw_offset %d\n", tsb->dcw_offset); 4806773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4807f3eb5384SStefan Weinhuber " tsb->count %d\n", tsb->count); 4808f3eb5384SStefan Weinhuber residual = tsb->count - 28; 4809773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4810f3eb5384SStefan Weinhuber " residual %d\n", residual); 4811f3eb5384SStefan Weinhuber 4812f3eb5384SStefan Weinhuber switch (tsb->flags & 0x07) { 4813f3eb5384SStefan Weinhuber case 1: /* tsa_iostat */ 4814773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4815f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_time %d\n", 4816f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_time); 4817773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4818f3eb5384SStefan Weinhuber " tsb->tsa.iostat.def_time %d\n", 4819f3eb5384SStefan Weinhuber tsb->tsa.iostat.def_time); 4820773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4821f3eb5384SStefan Weinhuber " tsb->tsa.iostat.queue_time %d\n", 4822f3eb5384SStefan Weinhuber tsb->tsa.iostat.queue_time); 4823773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4824f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_busy_time %d\n", 4825f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_busy_time); 4826773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4827f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_act_time %d\n", 4828f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_act_time); 4829f3eb5384SStefan Weinhuber sense = tsb->tsa.iostat.sense; 4830f3eb5384SStefan Weinhuber break; 4831f3eb5384SStefan Weinhuber case 2: /* ts_ddpc */ 4832773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4833f3eb5384SStefan Weinhuber " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); 4834ef19298bSStefan Weinhuber for (sl = 0; sl < 2; sl++) { 4835773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4836ef19298bSStefan Weinhuber " tsb->tsa.ddpc.rcq %2d-%2d: ", 4837ef19298bSStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 4838ef19298bSStefan Weinhuber rcq = tsb->tsa.ddpc.rcq; 4839f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 4840f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 4841ef19298bSStefan Weinhuber rcq[8 * sl + sct]); 4842f3eb5384SStefan Weinhuber } 4843f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 4844f3eb5384SStefan Weinhuber } 4845f3eb5384SStefan Weinhuber sense = tsb->tsa.ddpc.sense; 4846f3eb5384SStefan Weinhuber break; 4847f3eb5384SStefan Weinhuber case 3: /* tsa_intrg */ 4848773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4849f3eb5384SStefan Weinhuber " tsb->tsa.intrg.: not supportet yet\n"); 4850f3eb5384SStefan Weinhuber break; 4851f3eb5384SStefan Weinhuber } 4852f3eb5384SStefan Weinhuber 4853f3eb5384SStefan Weinhuber if (sense) { 4854f3eb5384SStefan Weinhuber for (sl = 0; sl < 4; sl++) { 4855773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4856f3eb5384SStefan Weinhuber " Sense(hex) %2d-%2d:", 4857f3eb5384SStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 4858f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 4859f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 4860f3eb5384SStefan Weinhuber sense[8 * sl + sct]); 4861f3eb5384SStefan Weinhuber } 4862f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 4863f3eb5384SStefan Weinhuber } 4864f3eb5384SStefan Weinhuber 4865f3eb5384SStefan Weinhuber if (sense[27] & DASD_SENSE_BIT_0) { 4866f3eb5384SStefan Weinhuber /* 24 Byte Sense Data */ 4867773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4868f3eb5384SStefan Weinhuber " 24 Byte: %x MSG %x, " 4869f3eb5384SStefan Weinhuber "%s MSGb to SYSOP\n", 4870f3eb5384SStefan Weinhuber sense[7] >> 4, sense[7] & 0x0f, 4871f3eb5384SStefan Weinhuber sense[1] & 0x10 ? "" : "no"); 4872f3eb5384SStefan Weinhuber } else { 4873f3eb5384SStefan Weinhuber /* 32 Byte Sense Data */ 4874773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4875f3eb5384SStefan Weinhuber " 32 Byte: Format: %x " 4876f3eb5384SStefan Weinhuber "Exception class %x\n", 4877f3eb5384SStefan Weinhuber sense[6] & 0x0f, sense[22] >> 4); 4878f3eb5384SStefan Weinhuber } 4879f3eb5384SStefan Weinhuber } else { 4880773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4881f3eb5384SStefan Weinhuber " SORRY - NO VALID SENSE AVAILABLE\n"); 4882f3eb5384SStefan Weinhuber } 4883f3eb5384SStefan Weinhuber } else { 4884773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4885f3eb5384SStefan Weinhuber " SORRY - NO TSB DATA AVAILABLE\n"); 4886f3eb5384SStefan Weinhuber } 4887773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 4888f3eb5384SStefan Weinhuber free_page((unsigned long) page); 4889f3eb5384SStefan Weinhuber } 4890f3eb5384SStefan Weinhuber 4891f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense(struct dasd_device *device, 4892f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 4893f3eb5384SStefan Weinhuber { 48948fd57520SJan Höppner u8 *sense = dasd_get_sense(irb); 48958fd57520SJan Höppner 48968fd57520SJan Höppner if (scsw_is_tm(&irb->scsw)) { 48978fd57520SJan Höppner /* 48988fd57520SJan Höppner * In some cases the 'File Protected' or 'Incorrect Length' 48998fd57520SJan Höppner * error might be expected and log messages shouldn't be written 49008fd57520SJan Höppner * then. Check if the according suppress bit is set. 49018fd57520SJan Höppner */ 49028fd57520SJan Höppner if (sense && (sense[1] & SNS1_FILE_PROTECTED) && 49038fd57520SJan Höppner test_bit(DASD_CQR_SUPPRESS_FP, &req->flags)) 49048fd57520SJan Höppner return; 49058fd57520SJan Höppner if (scsw_cstat(&irb->scsw) == 0x40 && 49068fd57520SJan Höppner test_bit(DASD_CQR_SUPPRESS_IL, &req->flags)) 49078fd57520SJan Höppner return; 49088fd57520SJan Höppner 4909f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_tcw(device, req, irb); 49108fd57520SJan Höppner } else { 49118fd57520SJan Höppner /* 49128fd57520SJan Höppner * In some cases the 'No Record Found' error might be expected 49138fd57520SJan Höppner * and log messages shouldn't be written then. Check if the 49148fd57520SJan Höppner * according suppress bit is set. 49158fd57520SJan Höppner */ 49168fd57520SJan Höppner if (sense && sense[1] & SNS1_NO_REC_FOUND && 49178fd57520SJan Höppner test_bit(DASD_CQR_SUPPRESS_NRF, &req->flags)) 49188fd57520SJan Höppner return; 49198fd57520SJan Höppner 4920f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_ccw(device, req, irb); 4921f3eb5384SStefan Weinhuber } 49228fd57520SJan Höppner } 4923f3eb5384SStefan Weinhuber 4924501183f2SStefan Haberland static int dasd_eckd_pm_freeze(struct dasd_device *device) 4925d41dd122SStefan Haberland { 4926d41dd122SStefan Haberland /* 4927d41dd122SStefan Haberland * the device should be disconnected from our LCU structure 4928d41dd122SStefan Haberland * on restore we will reconnect it and reread LCU specific 4929d41dd122SStefan Haberland * information like PAV support that might have changed 4930d41dd122SStefan Haberland */ 4931d41dd122SStefan Haberland dasd_alias_remove_device(device); 4932d41dd122SStefan Haberland dasd_alias_disconnect_device_from_lcu(device); 4933d41dd122SStefan Haberland 4934d41dd122SStefan Haberland return 0; 4935d41dd122SStefan Haberland } 4936d41dd122SStefan Haberland 4937501183f2SStefan Haberland static int dasd_eckd_restore_device(struct dasd_device *device) 4938d41dd122SStefan Haberland { 4939543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 49406fca97a9SStefan Haberland struct dasd_eckd_characteristics temp_rdc_data; 4941f9f8d02fSStefan Haberland int rc; 4942d41dd122SStefan Haberland struct dasd_uid temp_uid; 4943a7602f6cSStefan Haberland unsigned long flags; 4944ea4da6eaSStefan Haberland unsigned long cqr_flags = 0; 4945d41dd122SStefan Haberland 4946d41dd122SStefan Haberland /* Read Configuration Data */ 4947251afd69SStefan Haberland rc = dasd_eckd_read_conf(device); 4948251afd69SStefan Haberland if (rc) { 4949251afd69SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 4950251afd69SStefan Haberland "Read configuration data failed, rc=%d", rc); 4951251afd69SStefan Haberland goto out_err; 4952251afd69SStefan Haberland } 4953d41dd122SStefan Haberland 49542dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 49552dedf0d9SStefan Haberland /* Generate device unique id */ 49562dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 49572dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4958d41dd122SStefan Haberland if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) 4959a7602f6cSStefan Haberland dev_err(&device->cdev->dev, "The UID of the DASD has " 4960a7602f6cSStefan Haberland "changed\n"); 49612dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4962d41dd122SStefan Haberland if (rc) 4963d41dd122SStefan Haberland goto out_err; 4964d41dd122SStefan Haberland 4965d41dd122SStefan Haberland /* register lcu with alias handling, enable PAV if this is a new lcu */ 4966f9f8d02fSStefan Haberland rc = dasd_alias_make_device_known_to_lcu(device); 4967f9f8d02fSStefan Haberland if (rc) 4968251afd69SStefan Haberland goto out_err; 4969ea4da6eaSStefan Haberland 4970ea4da6eaSStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr_flags); 4971ea4da6eaSStefan Haberland dasd_eckd_validate_server(device, cqr_flags); 4972f4ac1d02SStefan Weinhuber 4973f4ac1d02SStefan Weinhuber /* RE-Read Configuration Data */ 4974251afd69SStefan Haberland rc = dasd_eckd_read_conf(device); 4975251afd69SStefan Haberland if (rc) { 4976251afd69SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 4977251afd69SStefan Haberland "Read configuration data failed, rc=%d", rc); 4978251afd69SStefan Haberland goto out_err2; 4979251afd69SStefan Haberland } 4980d41dd122SStefan Haberland 4981d41dd122SStefan Haberland /* Read Feature Codes */ 498268d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 4983d41dd122SStefan Haberland 4984d41dd122SStefan Haberland /* Read Device Characteristics */ 498568b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 49866fca97a9SStefan Haberland &temp_rdc_data, 64); 4987d41dd122SStefan Haberland if (rc) { 4988b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 4989b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 4990251afd69SStefan Haberland goto out_err2; 4991d41dd122SStefan Haberland } 4992a7602f6cSStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 49936fca97a9SStefan Haberland memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data)); 4994a7602f6cSStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4995d41dd122SStefan Haberland 4996d41dd122SStefan Haberland /* add device to alias management */ 4997d41dd122SStefan Haberland dasd_alias_add_device(device); 4998d41dd122SStefan Haberland 4999d41dd122SStefan Haberland return 0; 5000d41dd122SStefan Haberland 5001251afd69SStefan Haberland out_err2: 5002251afd69SStefan Haberland dasd_alias_disconnect_device_from_lcu(device); 5003d41dd122SStefan Haberland out_err: 5004e6125fbaSStefan Haberland return -1; 5005d41dd122SStefan Haberland } 5006d41dd122SStefan Haberland 5007501183f2SStefan Haberland static int dasd_eckd_reload_device(struct dasd_device *device) 5008501183f2SStefan Haberland { 5009543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 5010501183f2SStefan Haberland int rc, old_base; 50112dedf0d9SStefan Haberland char print_uid[60]; 50122dedf0d9SStefan Haberland struct dasd_uid uid; 50132dedf0d9SStefan Haberland unsigned long flags; 5014501183f2SStefan Haberland 501559a9ed5fSStefan Haberland /* 501659a9ed5fSStefan Haberland * remove device from alias handling to prevent new requests 501759a9ed5fSStefan Haberland * from being scheduled on the wrong alias device 501859a9ed5fSStefan Haberland */ 501959a9ed5fSStefan Haberland dasd_alias_remove_device(device); 502059a9ed5fSStefan Haberland 50212dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 5022501183f2SStefan Haberland old_base = private->uid.base_unit_addr; 50232dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 50242dedf0d9SStefan Haberland 5025501183f2SStefan Haberland /* Read Configuration Data */ 5026501183f2SStefan Haberland rc = dasd_eckd_read_conf(device); 5027501183f2SStefan Haberland if (rc) 5028501183f2SStefan Haberland goto out_err; 5029501183f2SStefan Haberland 50302dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 5031501183f2SStefan Haberland if (rc) 5032501183f2SStefan Haberland goto out_err; 5033501183f2SStefan Haberland /* 5034501183f2SStefan Haberland * update unit address configuration and 5035501183f2SStefan Haberland * add device to alias management 5036501183f2SStefan Haberland */ 5037501183f2SStefan Haberland dasd_alias_update_add_device(device); 5038501183f2SStefan Haberland 50392dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &uid); 50402dedf0d9SStefan Haberland 50412dedf0d9SStefan Haberland if (old_base != uid.base_unit_addr) { 50422dedf0d9SStefan Haberland if (strlen(uid.vduit) > 0) 50432dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 50442dedf0d9SStefan Haberland "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial, 50452dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr, uid.vduit); 5046501183f2SStefan Haberland else 50472dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 50482dedf0d9SStefan Haberland "%s.%s.%04x.%02x", uid.vendor, uid.serial, 50492dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr); 5050501183f2SStefan Haberland 5051501183f2SStefan Haberland dev_info(&device->cdev->dev, 5052501183f2SStefan Haberland "An Alias device was reassigned to a new base device " 50532dedf0d9SStefan Haberland "with UID: %s\n", print_uid); 5054501183f2SStefan Haberland } 5055501183f2SStefan Haberland return 0; 5056501183f2SStefan Haberland 5057501183f2SStefan Haberland out_err: 5058501183f2SStefan Haberland return -1; 5059501183f2SStefan Haberland } 5060501183f2SStefan Haberland 50615db8440cSStefan Haberland static int dasd_eckd_read_message_buffer(struct dasd_device *device, 50625db8440cSStefan Haberland struct dasd_rssd_messages *messages, 50635db8440cSStefan Haberland __u8 lpum) 50645db8440cSStefan Haberland { 50655db8440cSStefan Haberland struct dasd_rssd_messages *message_buf; 50665db8440cSStefan Haberland struct dasd_psf_prssd_data *prssdp; 50675db8440cSStefan Haberland struct dasd_ccw_req *cqr; 50685db8440cSStefan Haberland struct ccw1 *ccw; 50695db8440cSStefan Haberland int rc; 50705db8440cSStefan Haberland 50715db8440cSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 50725db8440cSStefan Haberland (sizeof(struct dasd_psf_prssd_data) + 50735db8440cSStefan Haberland sizeof(struct dasd_rssd_messages)), 50745db8440cSStefan Haberland device); 50755db8440cSStefan Haberland if (IS_ERR(cqr)) { 50765db8440cSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 50775db8440cSStefan Haberland "Could not allocate read message buffer request"); 50785db8440cSStefan Haberland return PTR_ERR(cqr); 50795db8440cSStefan Haberland } 50805db8440cSStefan Haberland 5081af775210SStefan Haberland cqr->lpm = lpum; 5082af775210SStefan Haberland retry: 50835db8440cSStefan Haberland cqr->startdev = device; 50845db8440cSStefan Haberland cqr->memdev = device; 50855db8440cSStefan Haberland cqr->block = NULL; 50865db8440cSStefan Haberland cqr->expires = 10 * HZ; 50875db8440cSStefan Haberland set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 5088b179b037SStefan Haberland /* dasd_sleep_on_immediatly does not do complex error 5089b179b037SStefan Haberland * recovery so clear erp flag and set retry counter to 5090b179b037SStefan Haberland * do basic erp */ 5091b179b037SStefan Haberland clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 5092b179b037SStefan Haberland cqr->retries = 256; 50935db8440cSStefan Haberland 50945db8440cSStefan Haberland /* Prepare for Read Subsystem Data */ 50955db8440cSStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 50965db8440cSStefan Haberland memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 50975db8440cSStefan Haberland prssdp->order = PSF_ORDER_PRSSD; 50985db8440cSStefan Haberland prssdp->suborder = 0x03; /* Message Buffer */ 50995db8440cSStefan Haberland /* all other bytes of prssdp must be zero */ 51005db8440cSStefan Haberland 51015db8440cSStefan Haberland ccw = cqr->cpaddr; 51025db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 51035db8440cSStefan Haberland ccw->count = sizeof(struct dasd_psf_prssd_data); 51045db8440cSStefan Haberland ccw->flags |= CCW_FLAG_CC; 51055db8440cSStefan Haberland ccw->flags |= CCW_FLAG_SLI; 51065db8440cSStefan Haberland ccw->cda = (__u32)(addr_t) prssdp; 51075db8440cSStefan Haberland 51085db8440cSStefan Haberland /* Read Subsystem Data - message buffer */ 51095db8440cSStefan Haberland message_buf = (struct dasd_rssd_messages *) (prssdp + 1); 51105db8440cSStefan Haberland memset(message_buf, 0, sizeof(struct dasd_rssd_messages)); 51115db8440cSStefan Haberland 51125db8440cSStefan Haberland ccw++; 51135db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_RSSD; 51145db8440cSStefan Haberland ccw->count = sizeof(struct dasd_rssd_messages); 51155db8440cSStefan Haberland ccw->flags |= CCW_FLAG_SLI; 51165db8440cSStefan Haberland ccw->cda = (__u32)(addr_t) message_buf; 51175db8440cSStefan Haberland 51185db8440cSStefan Haberland cqr->buildclk = get_tod_clock(); 51195db8440cSStefan Haberland cqr->status = DASD_CQR_FILLED; 51205db8440cSStefan Haberland rc = dasd_sleep_on_immediatly(cqr); 51215db8440cSStefan Haberland if (rc == 0) { 51225db8440cSStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 51235db8440cSStefan Haberland message_buf = (struct dasd_rssd_messages *) 51245db8440cSStefan Haberland (prssdp + 1); 51255db8440cSStefan Haberland memcpy(messages, message_buf, 51265db8440cSStefan Haberland sizeof(struct dasd_rssd_messages)); 5127af775210SStefan Haberland } else if (cqr->lpm) { 5128af775210SStefan Haberland /* 5129af775210SStefan Haberland * on z/VM we might not be able to do I/O on the requested path 5130af775210SStefan Haberland * but instead we get the required information on any path 5131af775210SStefan Haberland * so retry with open path mask 5132af775210SStefan Haberland */ 5133af775210SStefan Haberland cqr->lpm = 0; 5134af775210SStefan Haberland goto retry; 51355db8440cSStefan Haberland } else 51365db8440cSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 51375db8440cSStefan Haberland "Reading messages failed with rc=%d\n" 51385db8440cSStefan Haberland , rc); 51395db8440cSStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 51405db8440cSStefan Haberland return rc; 51415db8440cSStefan Haberland } 51425db8440cSStefan Haberland 51435a3b7b11SStefan Haberland static int dasd_eckd_query_host_access(struct dasd_device *device, 51445a3b7b11SStefan Haberland struct dasd_psf_query_host_access *data) 51455a3b7b11SStefan Haberland { 51465a3b7b11SStefan Haberland struct dasd_eckd_private *private = device->private; 51475a3b7b11SStefan Haberland struct dasd_psf_query_host_access *host_access; 51485a3b7b11SStefan Haberland struct dasd_psf_prssd_data *prssdp; 51495a3b7b11SStefan Haberland struct dasd_ccw_req *cqr; 51505a3b7b11SStefan Haberland struct ccw1 *ccw; 51515a3b7b11SStefan Haberland int rc; 51525a3b7b11SStefan Haberland 51535a3b7b11SStefan Haberland /* not available for HYPER PAV alias devices */ 51545a3b7b11SStefan Haberland if (!device->block && private->lcu->pav == HYPER_PAV) 51555a3b7b11SStefan Haberland return -EOPNOTSUPP; 51565a3b7b11SStefan Haberland 51575a3b7b11SStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 51585a3b7b11SStefan Haberland sizeof(struct dasd_psf_prssd_data) + 1, 51595a3b7b11SStefan Haberland device); 51605a3b7b11SStefan Haberland if (IS_ERR(cqr)) { 51615a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 51625a3b7b11SStefan Haberland "Could not allocate read message buffer request"); 51635a3b7b11SStefan Haberland return PTR_ERR(cqr); 51645a3b7b11SStefan Haberland } 51655a3b7b11SStefan Haberland host_access = kzalloc(sizeof(*host_access), GFP_KERNEL | GFP_DMA); 51665a3b7b11SStefan Haberland if (!host_access) { 51675a3b7b11SStefan Haberland dasd_sfree_request(cqr, device); 51685a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 51695a3b7b11SStefan Haberland "Could not allocate host_access buffer"); 51705a3b7b11SStefan Haberland return -ENOMEM; 51715a3b7b11SStefan Haberland } 51725a3b7b11SStefan Haberland cqr->startdev = device; 51735a3b7b11SStefan Haberland cqr->memdev = device; 51745a3b7b11SStefan Haberland cqr->block = NULL; 51755a3b7b11SStefan Haberland cqr->retries = 256; 51765a3b7b11SStefan Haberland cqr->expires = 10 * HZ; 51775a3b7b11SStefan Haberland 51785a3b7b11SStefan Haberland /* Prepare for Read Subsystem Data */ 51795a3b7b11SStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 51805a3b7b11SStefan Haberland memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 51815a3b7b11SStefan Haberland prssdp->order = PSF_ORDER_PRSSD; 51825a3b7b11SStefan Haberland prssdp->suborder = PSF_SUBORDER_QHA; /* query host access */ 51835a3b7b11SStefan Haberland /* LSS and Volume that will be queried */ 51845a3b7b11SStefan Haberland prssdp->lss = private->ned->ID; 51855a3b7b11SStefan Haberland prssdp->volume = private->ned->unit_addr; 51865a3b7b11SStefan Haberland /* all other bytes of prssdp must be zero */ 51875a3b7b11SStefan Haberland 51885a3b7b11SStefan Haberland ccw = cqr->cpaddr; 51895a3b7b11SStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 51905a3b7b11SStefan Haberland ccw->count = sizeof(struct dasd_psf_prssd_data); 51915a3b7b11SStefan Haberland ccw->flags |= CCW_FLAG_CC; 51925a3b7b11SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 51935a3b7b11SStefan Haberland ccw->cda = (__u32)(addr_t) prssdp; 51945a3b7b11SStefan Haberland 51955a3b7b11SStefan Haberland /* Read Subsystem Data - query host access */ 51965a3b7b11SStefan Haberland ccw++; 51975a3b7b11SStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_RSSD; 51985a3b7b11SStefan Haberland ccw->count = sizeof(struct dasd_psf_query_host_access); 51995a3b7b11SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 52005a3b7b11SStefan Haberland ccw->cda = (__u32)(addr_t) host_access; 52015a3b7b11SStefan Haberland 52025a3b7b11SStefan Haberland cqr->buildclk = get_tod_clock(); 52035a3b7b11SStefan Haberland cqr->status = DASD_CQR_FILLED; 5204f50af850SStefan Haberland rc = dasd_sleep_on_interruptible(cqr); 52055a3b7b11SStefan Haberland if (rc == 0) { 52065a3b7b11SStefan Haberland *data = *host_access; 52075a3b7b11SStefan Haberland } else { 52085a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 52095a3b7b11SStefan Haberland "Reading host access data failed with rc=%d\n", 52105a3b7b11SStefan Haberland rc); 52115a3b7b11SStefan Haberland rc = -EOPNOTSUPP; 52125a3b7b11SStefan Haberland } 52135a3b7b11SStefan Haberland 52145a3b7b11SStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 52155a3b7b11SStefan Haberland kfree(host_access); 52165a3b7b11SStefan Haberland return rc; 52175a3b7b11SStefan Haberland } 52185a3b7b11SStefan Haberland /* 52195a3b7b11SStefan Haberland * return number of grouped devices 52205a3b7b11SStefan Haberland */ 52215a3b7b11SStefan Haberland static int dasd_eckd_host_access_count(struct dasd_device *device) 52225a3b7b11SStefan Haberland { 52235a3b7b11SStefan Haberland struct dasd_psf_query_host_access *access; 52245a3b7b11SStefan Haberland struct dasd_ckd_path_group_entry *entry; 52255a3b7b11SStefan Haberland struct dasd_ckd_host_information *info; 52265a3b7b11SStefan Haberland int count = 0; 52275a3b7b11SStefan Haberland int rc, i; 52285a3b7b11SStefan Haberland 52295a3b7b11SStefan Haberland access = kzalloc(sizeof(*access), GFP_NOIO); 52305a3b7b11SStefan Haberland if (!access) { 52315a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 52325a3b7b11SStefan Haberland "Could not allocate access buffer"); 52335a3b7b11SStefan Haberland return -ENOMEM; 52345a3b7b11SStefan Haberland } 52355a3b7b11SStefan Haberland rc = dasd_eckd_query_host_access(device, access); 52365a3b7b11SStefan Haberland if (rc) { 52375a3b7b11SStefan Haberland kfree(access); 52385a3b7b11SStefan Haberland return rc; 52395a3b7b11SStefan Haberland } 52405a3b7b11SStefan Haberland 52415a3b7b11SStefan Haberland info = (struct dasd_ckd_host_information *) 52425a3b7b11SStefan Haberland access->host_access_information; 52435a3b7b11SStefan Haberland for (i = 0; i < info->entry_count; i++) { 52445a3b7b11SStefan Haberland entry = (struct dasd_ckd_path_group_entry *) 52455a3b7b11SStefan Haberland (info->entry + i * info->entry_size); 52465a3b7b11SStefan Haberland if (entry->status_flags & DASD_ECKD_PG_GROUPED) 52475a3b7b11SStefan Haberland count++; 52485a3b7b11SStefan Haberland } 52495a3b7b11SStefan Haberland 52505a3b7b11SStefan Haberland kfree(access); 52515a3b7b11SStefan Haberland return count; 52525a3b7b11SStefan Haberland } 52535a3b7b11SStefan Haberland 52545a3b7b11SStefan Haberland /* 52555a3b7b11SStefan Haberland * write host access information to a sequential file 52565a3b7b11SStefan Haberland */ 52575a3b7b11SStefan Haberland static int dasd_hosts_print(struct dasd_device *device, struct seq_file *m) 52585a3b7b11SStefan Haberland { 52595a3b7b11SStefan Haberland struct dasd_psf_query_host_access *access; 52605a3b7b11SStefan Haberland struct dasd_ckd_path_group_entry *entry; 52615a3b7b11SStefan Haberland struct dasd_ckd_host_information *info; 52625a3b7b11SStefan Haberland char sysplex[9] = ""; 52635a3b7b11SStefan Haberland int rc, i, j; 52645a3b7b11SStefan Haberland 52655a3b7b11SStefan Haberland access = kzalloc(sizeof(*access), GFP_NOIO); 52665a3b7b11SStefan Haberland if (!access) { 52675a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 52685a3b7b11SStefan Haberland "Could not allocate access buffer"); 52695a3b7b11SStefan Haberland return -ENOMEM; 52705a3b7b11SStefan Haberland } 52715a3b7b11SStefan Haberland rc = dasd_eckd_query_host_access(device, access); 52725a3b7b11SStefan Haberland if (rc) { 52735a3b7b11SStefan Haberland kfree(access); 52745a3b7b11SStefan Haberland return rc; 52755a3b7b11SStefan Haberland } 52765a3b7b11SStefan Haberland 52775a3b7b11SStefan Haberland info = (struct dasd_ckd_host_information *) 52785a3b7b11SStefan Haberland access->host_access_information; 52795a3b7b11SStefan Haberland for (i = 0; i < info->entry_count; i++) { 52805a3b7b11SStefan Haberland entry = (struct dasd_ckd_path_group_entry *) 52815a3b7b11SStefan Haberland (info->entry + i * info->entry_size); 52825a3b7b11SStefan Haberland /* PGID */ 52835a3b7b11SStefan Haberland seq_puts(m, "pgid "); 52845a3b7b11SStefan Haberland for (j = 0; j < 11; j++) 52855a3b7b11SStefan Haberland seq_printf(m, "%02x", entry->pgid[j]); 52865a3b7b11SStefan Haberland seq_putc(m, '\n'); 52875a3b7b11SStefan Haberland /* FLAGS */ 52885a3b7b11SStefan Haberland seq_printf(m, "status_flags %02x\n", entry->status_flags); 52895a3b7b11SStefan Haberland /* SYSPLEX NAME */ 52905a3b7b11SStefan Haberland memcpy(&sysplex, &entry->sysplex_name, sizeof(sysplex) - 1); 52915a3b7b11SStefan Haberland EBCASC(sysplex, sizeof(sysplex)); 52925a3b7b11SStefan Haberland seq_printf(m, "sysplex_name %8s\n", sysplex); 52935a3b7b11SStefan Haberland /* SUPPORTED CYLINDER */ 52945a3b7b11SStefan Haberland seq_printf(m, "supported_cylinder %d\n", entry->cylinder); 52955a3b7b11SStefan Haberland /* TIMESTAMP */ 52965a3b7b11SStefan Haberland seq_printf(m, "timestamp %lu\n", (unsigned long) 52975a3b7b11SStefan Haberland entry->timestamp); 52985a3b7b11SStefan Haberland } 52995a3b7b11SStefan Haberland kfree(access); 53005a3b7b11SStefan Haberland 53015a3b7b11SStefan Haberland return 0; 53025a3b7b11SStefan Haberland } 53035a3b7b11SStefan Haberland 53045db8440cSStefan Haberland /* 53055db8440cSStefan Haberland * Perform Subsystem Function - CUIR response 53065db8440cSStefan Haberland */ 53075db8440cSStefan Haberland static int 53085db8440cSStefan Haberland dasd_eckd_psf_cuir_response(struct dasd_device *device, int response, 53095db8440cSStefan Haberland __u32 message_id, 53105db8440cSStefan Haberland struct channel_path_desc *desc, 53115db8440cSStefan Haberland struct subchannel_id sch_id) 53125db8440cSStefan Haberland { 53135db8440cSStefan Haberland struct dasd_psf_cuir_response *psf_cuir; 53145db8440cSStefan Haberland struct dasd_ccw_req *cqr; 53155db8440cSStefan Haberland struct ccw1 *ccw; 53165db8440cSStefan Haberland int rc; 53175db8440cSStefan Haberland 53185db8440cSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 53195db8440cSStefan Haberland sizeof(struct dasd_psf_cuir_response), 53205db8440cSStefan Haberland device); 53215db8440cSStefan Haberland 53225db8440cSStefan Haberland if (IS_ERR(cqr)) { 53235db8440cSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 53245db8440cSStefan Haberland "Could not allocate PSF-CUIR request"); 53255db8440cSStefan Haberland return PTR_ERR(cqr); 53265db8440cSStefan Haberland } 53275db8440cSStefan Haberland 53285db8440cSStefan Haberland psf_cuir = (struct dasd_psf_cuir_response *)cqr->data; 53295db8440cSStefan Haberland psf_cuir->order = PSF_ORDER_CUIR_RESPONSE; 53305db8440cSStefan Haberland psf_cuir->cc = response; 53315db8440cSStefan Haberland if (desc) 53325db8440cSStefan Haberland psf_cuir->chpid = desc->chpid; 53335db8440cSStefan Haberland psf_cuir->message_id = message_id; 53345db8440cSStefan Haberland psf_cuir->cssid = sch_id.cssid; 53355db8440cSStefan Haberland psf_cuir->ssid = sch_id.ssid; 53365db8440cSStefan Haberland ccw = cqr->cpaddr; 53375db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 53385db8440cSStefan Haberland ccw->cda = (__u32)(addr_t)psf_cuir; 5339b179b037SStefan Haberland ccw->flags = CCW_FLAG_SLI; 53405db8440cSStefan Haberland ccw->count = sizeof(struct dasd_psf_cuir_response); 53415db8440cSStefan Haberland 53425db8440cSStefan Haberland cqr->startdev = device; 53435db8440cSStefan Haberland cqr->memdev = device; 53445db8440cSStefan Haberland cqr->block = NULL; 53455db8440cSStefan Haberland cqr->retries = 256; 53465db8440cSStefan Haberland cqr->expires = 10*HZ; 53475db8440cSStefan Haberland cqr->buildclk = get_tod_clock(); 53485db8440cSStefan Haberland cqr->status = DASD_CQR_FILLED; 5349b179b037SStefan Haberland set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 53505db8440cSStefan Haberland 53515db8440cSStefan Haberland rc = dasd_sleep_on(cqr); 53525db8440cSStefan Haberland 53535db8440cSStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 53545db8440cSStefan Haberland return rc; 53555db8440cSStefan Haberland } 53565db8440cSStefan Haberland 5357b179b037SStefan Haberland /* 5358b179b037SStefan Haberland * return configuration data that is referenced by record selector 5359b179b037SStefan Haberland * if a record selector is specified or per default return the 5360b179b037SStefan Haberland * conf_data pointer for the path specified by lpum 5361b179b037SStefan Haberland */ 5362b179b037SStefan Haberland static struct dasd_conf_data *dasd_eckd_get_ref_conf(struct dasd_device *device, 5363b179b037SStefan Haberland __u8 lpum, 5364b179b037SStefan Haberland struct dasd_cuir_message *cuir) 53655db8440cSStefan Haberland { 5366543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 5367b179b037SStefan Haberland struct dasd_conf_data *conf_data; 5368b179b037SStefan Haberland int path, pos; 53695db8440cSStefan Haberland 5370b179b037SStefan Haberland if (cuir->record_selector == 0) 5371b179b037SStefan Haberland goto out; 5372b179b037SStefan Haberland for (path = 0x80, pos = 0; path; path >>= 1, pos++) { 5373b179b037SStefan Haberland conf_data = private->path_conf_data[pos]; 5374b179b037SStefan Haberland if (conf_data->gneq.record_selector == 5375b179b037SStefan Haberland cuir->record_selector) 5376b179b037SStefan Haberland return conf_data; 53775db8440cSStefan Haberland } 5378b179b037SStefan Haberland out: 53799d49f86dSSebastian Ott return private->path_conf_data[pathmask_to_pos(lpum)]; 53805db8440cSStefan Haberland } 53815db8440cSStefan Haberland 53825db8440cSStefan Haberland /* 5383b179b037SStefan Haberland * This function determines the scope of a reconfiguration request by 5384b179b037SStefan Haberland * analysing the path and device selection data provided in the CUIR request. 5385b179b037SStefan Haberland * Returns a path mask containing CUIR affected paths for the give device. 5386b179b037SStefan Haberland * 5387b179b037SStefan Haberland * If the CUIR request does not contain the required information return the 5388b179b037SStefan Haberland * path mask of the path the attention message for the CUIR request was reveived 5389b179b037SStefan Haberland * on. 5390b179b037SStefan Haberland */ 5391b179b037SStefan Haberland static int dasd_eckd_cuir_scope(struct dasd_device *device, __u8 lpum, 5392b179b037SStefan Haberland struct dasd_cuir_message *cuir) 5393b179b037SStefan Haberland { 5394543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 5395b179b037SStefan Haberland struct dasd_conf_data *ref_conf_data; 5396b179b037SStefan Haberland unsigned long bitmask = 0, mask = 0; 5397b179b037SStefan Haberland struct dasd_conf_data *conf_data; 5398b179b037SStefan Haberland unsigned int pos, path; 5399b179b037SStefan Haberland char *ref_gneq, *gneq; 5400b179b037SStefan Haberland char *ref_ned, *ned; 5401b179b037SStefan Haberland int tbcpm = 0; 5402b179b037SStefan Haberland 5403b179b037SStefan Haberland /* if CUIR request does not specify the scope use the path 5404b179b037SStefan Haberland the attention message was presented on */ 5405b179b037SStefan Haberland if (!cuir->ned_map || 5406b179b037SStefan Haberland !(cuir->neq_map[0] | cuir->neq_map[1] | cuir->neq_map[2])) 5407b179b037SStefan Haberland return lpum; 5408b179b037SStefan Haberland 5409b179b037SStefan Haberland /* get reference conf data */ 5410b179b037SStefan Haberland ref_conf_data = dasd_eckd_get_ref_conf(device, lpum, cuir); 5411b179b037SStefan Haberland /* reference ned is determined by ned_map field */ 5412b179b037SStefan Haberland pos = 8 - ffs(cuir->ned_map); 5413b179b037SStefan Haberland ref_ned = (char *)&ref_conf_data->neds[pos]; 5414b179b037SStefan Haberland ref_gneq = (char *)&ref_conf_data->gneq; 5415b179b037SStefan Haberland /* transfer 24 bit neq_map to mask */ 5416b179b037SStefan Haberland mask = cuir->neq_map[2]; 5417b179b037SStefan Haberland mask |= cuir->neq_map[1] << 8; 5418b179b037SStefan Haberland mask |= cuir->neq_map[0] << 16; 5419b179b037SStefan Haberland 5420b179b037SStefan Haberland for (path = 0x80; path; path >>= 1) { 5421b179b037SStefan Haberland /* initialise data per path */ 5422b179b037SStefan Haberland bitmask = mask; 54239d49f86dSSebastian Ott pos = pathmask_to_pos(path); 5424b179b037SStefan Haberland conf_data = private->path_conf_data[pos]; 5425b179b037SStefan Haberland pos = 8 - ffs(cuir->ned_map); 5426b179b037SStefan Haberland ned = (char *) &conf_data->neds[pos]; 5427b179b037SStefan Haberland /* compare reference ned and per path ned */ 5428b179b037SStefan Haberland if (memcmp(ref_ned, ned, sizeof(*ned)) != 0) 5429b179b037SStefan Haberland continue; 5430b179b037SStefan Haberland gneq = (char *)&conf_data->gneq; 5431b179b037SStefan Haberland /* compare reference gneq and per_path gneq under 5432b179b037SStefan Haberland 24 bit mask where mask bit 0 equals byte 7 of 5433b179b037SStefan Haberland the gneq and mask bit 24 equals byte 31 */ 5434b179b037SStefan Haberland while (bitmask) { 5435b179b037SStefan Haberland pos = ffs(bitmask) - 1; 5436b179b037SStefan Haberland if (memcmp(&ref_gneq[31 - pos], &gneq[31 - pos], 1) 5437b179b037SStefan Haberland != 0) 5438b179b037SStefan Haberland break; 5439b179b037SStefan Haberland clear_bit(pos, &bitmask); 5440b179b037SStefan Haberland } 5441b179b037SStefan Haberland if (bitmask) 5442b179b037SStefan Haberland continue; 5443b179b037SStefan Haberland /* device and path match the reference values 5444b179b037SStefan Haberland add path to CUIR scope */ 5445b179b037SStefan Haberland tbcpm |= path; 5446b179b037SStefan Haberland } 5447b179b037SStefan Haberland return tbcpm; 5448b179b037SStefan Haberland } 5449b179b037SStefan Haberland 5450b179b037SStefan Haberland static void dasd_eckd_cuir_notify_user(struct dasd_device *device, 5451b179b037SStefan Haberland unsigned long paths, 5452b179b037SStefan Haberland struct subchannel_id sch_id, int action) 5453b179b037SStefan Haberland { 5454b179b037SStefan Haberland struct channel_path_desc *desc; 5455b179b037SStefan Haberland int pos; 5456b179b037SStefan Haberland 5457b179b037SStefan Haberland while (paths) { 5458b179b037SStefan Haberland /* get position of bit in mask */ 5459b179b037SStefan Haberland pos = ffs(paths) - 1; 5460b179b037SStefan Haberland /* get channel path descriptor from this position */ 5461b179b037SStefan Haberland desc = ccw_device_get_chp_desc(device->cdev, 7 - pos); 5462b179b037SStefan Haberland if (action == CUIR_QUIESCE) 5463b179b037SStefan Haberland pr_warn("Service on the storage server caused path " 5464b179b037SStefan Haberland "%x.%02x to go offline", sch_id.cssid, 5465b179b037SStefan Haberland desc ? desc->chpid : 0); 5466b179b037SStefan Haberland else if (action == CUIR_RESUME) 5467b179b037SStefan Haberland pr_info("Path %x.%02x is back online after service " 5468b179b037SStefan Haberland "on the storage server", sch_id.cssid, 5469b179b037SStefan Haberland desc ? desc->chpid : 0); 5470b179b037SStefan Haberland kfree(desc); 5471b179b037SStefan Haberland clear_bit(pos, &paths); 5472b179b037SStefan Haberland } 5473b179b037SStefan Haberland } 5474b179b037SStefan Haberland 5475b179b037SStefan Haberland static int dasd_eckd_cuir_remove_path(struct dasd_device *device, __u8 lpum, 5476b179b037SStefan Haberland struct dasd_cuir_message *cuir) 5477b179b037SStefan Haberland { 5478b179b037SStefan Haberland unsigned long tbcpm; 5479b179b037SStefan Haberland 5480b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(device, lpum, cuir); 5481b179b037SStefan Haberland /* nothing to do if path is not in use */ 5482b179b037SStefan Haberland if (!(device->path_data.opm & tbcpm)) 5483b179b037SStefan Haberland return 0; 5484b179b037SStefan Haberland if (!(device->path_data.opm & ~tbcpm)) { 5485b179b037SStefan Haberland /* no path would be left if the CUIR action is taken 5486b179b037SStefan Haberland return error */ 5487b179b037SStefan Haberland return -EINVAL; 5488b179b037SStefan Haberland } 5489b179b037SStefan Haberland /* remove device from operational path mask */ 5490b179b037SStefan Haberland device->path_data.opm &= ~tbcpm; 5491b179b037SStefan Haberland device->path_data.cuirpm |= tbcpm; 5492b179b037SStefan Haberland return tbcpm; 5493b179b037SStefan Haberland } 5494b179b037SStefan Haberland 5495b179b037SStefan Haberland /* 5496b179b037SStefan Haberland * walk through all devices and build a path mask to quiesce them 5497b179b037SStefan Haberland * return an error if the last path to a device would be removed 54985db8440cSStefan Haberland * 54995db8440cSStefan Haberland * if only part of the devices are quiesced and an error 55005db8440cSStefan Haberland * occurs no onlining necessary, the storage server will 55015db8440cSStefan Haberland * notify the already set offline devices again 55025db8440cSStefan Haberland */ 55035db8440cSStefan Haberland static int dasd_eckd_cuir_quiesce(struct dasd_device *device, __u8 lpum, 5504b179b037SStefan Haberland struct subchannel_id sch_id, 5505b179b037SStefan Haberland struct dasd_cuir_message *cuir) 55065db8440cSStefan Haberland { 5507543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 55085db8440cSStefan Haberland struct alias_pav_group *pavgroup, *tempgroup; 55095db8440cSStefan Haberland struct dasd_device *dev, *n; 5510b179b037SStefan Haberland unsigned long paths = 0; 5511b179b037SStefan Haberland unsigned long flags; 5512b179b037SStefan Haberland int tbcpm; 55135db8440cSStefan Haberland 55145db8440cSStefan Haberland /* active devices */ 5515b179b037SStefan Haberland list_for_each_entry_safe(dev, n, &private->lcu->active_devices, 55165db8440cSStefan Haberland alias_list) { 5517b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 5518b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 5519b179b037SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); 5520b179b037SStefan Haberland if (tbcpm < 0) 5521b179b037SStefan Haberland goto out_err; 5522b179b037SStefan Haberland paths |= tbcpm; 55235db8440cSStefan Haberland } 55245db8440cSStefan Haberland /* inactive devices */ 5525b179b037SStefan Haberland list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices, 55265db8440cSStefan Haberland alias_list) { 5527b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 5528b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 5529b179b037SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); 5530b179b037SStefan Haberland if (tbcpm < 0) 5531b179b037SStefan Haberland goto out_err; 5532b179b037SStefan Haberland paths |= tbcpm; 55335db8440cSStefan Haberland } 55345db8440cSStefan Haberland /* devices in PAV groups */ 55355db8440cSStefan Haberland list_for_each_entry_safe(pavgroup, tempgroup, 55365db8440cSStefan Haberland &private->lcu->grouplist, group) { 55375db8440cSStefan Haberland list_for_each_entry_safe(dev, n, &pavgroup->baselist, 55385db8440cSStefan Haberland alias_list) { 5539b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 5540b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 5541b179b037SStefan Haberland spin_unlock_irqrestore( 5542b179b037SStefan Haberland get_ccwdev_lock(dev->cdev), flags); 5543b179b037SStefan Haberland if (tbcpm < 0) 5544b179b037SStefan Haberland goto out_err; 5545b179b037SStefan Haberland paths |= tbcpm; 55465db8440cSStefan Haberland } 55475db8440cSStefan Haberland list_for_each_entry_safe(dev, n, &pavgroup->aliaslist, 55485db8440cSStefan Haberland alias_list) { 5549b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 5550b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 5551b179b037SStefan Haberland spin_unlock_irqrestore( 5552b179b037SStefan Haberland get_ccwdev_lock(dev->cdev), flags); 5553b179b037SStefan Haberland if (tbcpm < 0) 5554b179b037SStefan Haberland goto out_err; 5555b179b037SStefan Haberland paths |= tbcpm; 55565db8440cSStefan Haberland } 55575db8440cSStefan Haberland } 5558b179b037SStefan Haberland /* notify user about all paths affected by CUIR action */ 5559b179b037SStefan Haberland dasd_eckd_cuir_notify_user(device, paths, sch_id, CUIR_QUIESCE); 5560b179b037SStefan Haberland return 0; 5561b179b037SStefan Haberland out_err: 5562b179b037SStefan Haberland return tbcpm; 55635db8440cSStefan Haberland } 55645db8440cSStefan Haberland 55655db8440cSStefan Haberland static int dasd_eckd_cuir_resume(struct dasd_device *device, __u8 lpum, 5566b179b037SStefan Haberland struct subchannel_id sch_id, 5567b179b037SStefan Haberland struct dasd_cuir_message *cuir) 55685db8440cSStefan Haberland { 5569543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 55705db8440cSStefan Haberland struct alias_pav_group *pavgroup, *tempgroup; 55715db8440cSStefan Haberland struct dasd_device *dev, *n; 5572b179b037SStefan Haberland unsigned long paths = 0; 5573b179b037SStefan Haberland int tbcpm; 55745db8440cSStefan Haberland 55755db8440cSStefan Haberland /* 55765db8440cSStefan Haberland * the path may have been added through a generic path event before 55775db8440cSStefan Haberland * only trigger path verification if the path is not already in use 55785db8440cSStefan Haberland */ 55795db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 55805db8440cSStefan Haberland &private->lcu->active_devices, 55815db8440cSStefan Haberland alias_list) { 5582b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 5583b179b037SStefan Haberland paths |= tbcpm; 5584b179b037SStefan Haberland if (!(dev->path_data.opm & tbcpm)) { 5585b179b037SStefan Haberland dev->path_data.tbvpm |= tbcpm; 55865db8440cSStefan Haberland dasd_schedule_device_bh(dev); 55875db8440cSStefan Haberland } 55885db8440cSStefan Haberland } 55895db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 55905db8440cSStefan Haberland &private->lcu->inactive_devices, 55915db8440cSStefan Haberland alias_list) { 5592b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 5593b179b037SStefan Haberland paths |= tbcpm; 5594b179b037SStefan Haberland if (!(dev->path_data.opm & tbcpm)) { 5595b179b037SStefan Haberland dev->path_data.tbvpm |= tbcpm; 55965db8440cSStefan Haberland dasd_schedule_device_bh(dev); 55975db8440cSStefan Haberland } 55985db8440cSStefan Haberland } 55995db8440cSStefan Haberland /* devices in PAV groups */ 56005db8440cSStefan Haberland list_for_each_entry_safe(pavgroup, tempgroup, 56015db8440cSStefan Haberland &private->lcu->grouplist, 56025db8440cSStefan Haberland group) { 56035db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 56045db8440cSStefan Haberland &pavgroup->baselist, 56055db8440cSStefan Haberland alias_list) { 5606b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 5607b179b037SStefan Haberland paths |= tbcpm; 5608b179b037SStefan Haberland if (!(dev->path_data.opm & tbcpm)) { 5609b179b037SStefan Haberland dev->path_data.tbvpm |= tbcpm; 56105db8440cSStefan Haberland dasd_schedule_device_bh(dev); 56115db8440cSStefan Haberland } 56125db8440cSStefan Haberland } 56135db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 56145db8440cSStefan Haberland &pavgroup->aliaslist, 56155db8440cSStefan Haberland alias_list) { 5616b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 5617b179b037SStefan Haberland paths |= tbcpm; 5618b179b037SStefan Haberland if (!(dev->path_data.opm & tbcpm)) { 5619b179b037SStefan Haberland dev->path_data.tbvpm |= tbcpm; 56205db8440cSStefan Haberland dasd_schedule_device_bh(dev); 56215db8440cSStefan Haberland } 56225db8440cSStefan Haberland } 56235db8440cSStefan Haberland } 5624b179b037SStefan Haberland /* notify user about all paths affected by CUIR action */ 5625b179b037SStefan Haberland dasd_eckd_cuir_notify_user(device, paths, sch_id, CUIR_RESUME); 5626b179b037SStefan Haberland return 0; 56275db8440cSStefan Haberland } 56285db8440cSStefan Haberland 56295db8440cSStefan Haberland static void dasd_eckd_handle_cuir(struct dasd_device *device, void *messages, 56305db8440cSStefan Haberland __u8 lpum) 56315db8440cSStefan Haberland { 56325db8440cSStefan Haberland struct dasd_cuir_message *cuir = messages; 56335db8440cSStefan Haberland struct channel_path_desc *desc; 56345db8440cSStefan Haberland struct subchannel_id sch_id; 56355db8440cSStefan Haberland int pos, response; 56365db8440cSStefan Haberland 5637b179b037SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, 5638b179b037SStefan Haberland "CUIR request: %016llx %016llx %016llx %08x", 5639b179b037SStefan Haberland ((u64 *)cuir)[0], ((u64 *)cuir)[1], ((u64 *)cuir)[2], 5640b179b037SStefan Haberland ((u32 *)cuir)[3]); 5641b179b037SStefan Haberland ccw_device_get_schid(device->cdev, &sch_id); 56429d49f86dSSebastian Ott pos = pathmask_to_pos(lpum); 56435db8440cSStefan Haberland desc = ccw_device_get_chp_desc(device->cdev, pos); 56445db8440cSStefan Haberland 56455db8440cSStefan Haberland if (cuir->code == CUIR_QUIESCE) { 56465db8440cSStefan Haberland /* quiesce */ 5647b179b037SStefan Haberland if (dasd_eckd_cuir_quiesce(device, lpum, sch_id, cuir)) 5648b179b037SStefan Haberland response = PSF_CUIR_LAST_PATH; 5649b179b037SStefan Haberland else 5650b179b037SStefan Haberland response = PSF_CUIR_COMPLETED; 56515db8440cSStefan Haberland } else if (cuir->code == CUIR_RESUME) { 56525db8440cSStefan Haberland /* resume */ 5653b179b037SStefan Haberland dasd_eckd_cuir_resume(device, lpum, sch_id, cuir); 5654b179b037SStefan Haberland response = PSF_CUIR_COMPLETED; 56555db8440cSStefan Haberland } else 56565db8440cSStefan Haberland response = PSF_CUIR_NOT_SUPPORTED; 56575db8440cSStefan Haberland 5658b179b037SStefan Haberland dasd_eckd_psf_cuir_response(device, response, 5659b179b037SStefan Haberland cuir->message_id, desc, sch_id); 5660b179b037SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, 5661b179b037SStefan Haberland "CUIR response: %d on message ID %08x", response, 5662b179b037SStefan Haberland cuir->message_id); 56635db8440cSStefan Haberland /* free descriptor copy */ 56645db8440cSStefan Haberland kfree(desc); 5665b179b037SStefan Haberland /* to make sure there is no attention left schedule work again */ 5666b179b037SStefan Haberland device->discipline->check_attention(device, lpum); 56675db8440cSStefan Haberland } 56685db8440cSStefan Haberland 56695db8440cSStefan Haberland static void dasd_eckd_check_attention_work(struct work_struct *work) 56705db8440cSStefan Haberland { 56715db8440cSStefan Haberland struct check_attention_work_data *data; 56725db8440cSStefan Haberland struct dasd_rssd_messages *messages; 56735db8440cSStefan Haberland struct dasd_device *device; 56745db8440cSStefan Haberland int rc; 56755db8440cSStefan Haberland 56765db8440cSStefan Haberland data = container_of(work, struct check_attention_work_data, worker); 56775db8440cSStefan Haberland device = data->device; 56785db8440cSStefan Haberland messages = kzalloc(sizeof(*messages), GFP_KERNEL); 56795db8440cSStefan Haberland if (!messages) { 56805db8440cSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 56815db8440cSStefan Haberland "Could not allocate attention message buffer"); 56825db8440cSStefan Haberland goto out; 56835db8440cSStefan Haberland } 56845db8440cSStefan Haberland rc = dasd_eckd_read_message_buffer(device, messages, data->lpum); 56855db8440cSStefan Haberland if (rc) 56865db8440cSStefan Haberland goto out; 56875db8440cSStefan Haberland if (messages->length == ATTENTION_LENGTH_CUIR && 56885db8440cSStefan Haberland messages->format == ATTENTION_FORMAT_CUIR) 56895db8440cSStefan Haberland dasd_eckd_handle_cuir(device, messages, data->lpum); 56905db8440cSStefan Haberland out: 56915db8440cSStefan Haberland dasd_put_device(device); 56925db8440cSStefan Haberland kfree(messages); 56935db8440cSStefan Haberland kfree(data); 56945db8440cSStefan Haberland } 56955db8440cSStefan Haberland 56965db8440cSStefan Haberland static int dasd_eckd_check_attention(struct dasd_device *device, __u8 lpum) 56975db8440cSStefan Haberland { 56985db8440cSStefan Haberland struct check_attention_work_data *data; 56995db8440cSStefan Haberland 57005db8440cSStefan Haberland data = kzalloc(sizeof(*data), GFP_ATOMIC); 57015db8440cSStefan Haberland if (!data) 57025db8440cSStefan Haberland return -ENOMEM; 57035db8440cSStefan Haberland INIT_WORK(&data->worker, dasd_eckd_check_attention_work); 57045db8440cSStefan Haberland dasd_get_device(device); 57055db8440cSStefan Haberland data->device = device; 57065db8440cSStefan Haberland data->lpum = lpum; 57075db8440cSStefan Haberland schedule_work(&data->worker); 57085db8440cSStefan Haberland return 0; 57095db8440cSStefan Haberland } 57105db8440cSStefan Haberland 5711d41dd122SStefan Haberland static struct ccw_driver dasd_eckd_driver = { 57123bda058bSSebastian Ott .driver = { 5713d41dd122SStefan Haberland .name = "dasd-eckd", 5714d41dd122SStefan Haberland .owner = THIS_MODULE, 57153bda058bSSebastian Ott }, 5716d41dd122SStefan Haberland .ids = dasd_eckd_ids, 5717d41dd122SStefan Haberland .probe = dasd_eckd_probe, 5718d41dd122SStefan Haberland .remove = dasd_generic_remove, 5719d41dd122SStefan Haberland .set_offline = dasd_generic_set_offline, 5720d41dd122SStefan Haberland .set_online = dasd_eckd_set_online, 5721d41dd122SStefan Haberland .notify = dasd_generic_notify, 5722a4d26c6aSStefan Weinhuber .path_event = dasd_generic_path_event, 57234679e893SStefan Haberland .shutdown = dasd_generic_shutdown, 5724d41dd122SStefan Haberland .freeze = dasd_generic_pm_freeze, 5725d41dd122SStefan Haberland .thaw = dasd_generic_restore_device, 5726d41dd122SStefan Haberland .restore = dasd_generic_restore_device, 5727a23ed009SStefan Haberland .uc_handler = dasd_generic_uc_handler, 5728420f42ecSHeiko Carstens .int_class = IRQIO_DAS, 5729d41dd122SStefan Haberland }; 5730f3eb5384SStefan Weinhuber 57311da177e4SLinus Torvalds /* 57321da177e4SLinus Torvalds * max_blocks is dependent on the amount of storage that is available 57331da177e4SLinus Torvalds * in the static io buffer for each device. Currently each device has 57341da177e4SLinus Torvalds * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has 57351da177e4SLinus Torvalds * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use 57361da177e4SLinus Torvalds * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In 57371da177e4SLinus Torvalds * addition we have one define extent ccw + 16 bytes of data and one 57381da177e4SLinus Torvalds * locate record ccw + 16 bytes of data. That makes: 57391da177e4SLinus Torvalds * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. 57401da177e4SLinus Torvalds * We want to fit two into the available memory so that we can immediately 57411da177e4SLinus Torvalds * start the next request if one finishes off. That makes 249.5 blocks 57421da177e4SLinus Torvalds * for one request. Give a little safety and the result is 240. 57431da177e4SLinus Torvalds */ 57441da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline = { 57451da177e4SLinus Torvalds .owner = THIS_MODULE, 57461da177e4SLinus Torvalds .name = "ECKD", 57471da177e4SLinus Torvalds .ebcname = "ECKD", 5748ef19298bSStefan Weinhuber .max_blocks = 190, 57491da177e4SLinus Torvalds .check_device = dasd_eckd_check_characteristics, 57508e09f215SStefan Weinhuber .uncheck_device = dasd_eckd_uncheck_device, 57511da177e4SLinus Torvalds .do_analysis = dasd_eckd_do_analysis, 5752a4d26c6aSStefan Weinhuber .verify_path = dasd_eckd_verify_path, 5753d42e1712SStefan Haberland .basic_to_ready = dasd_eckd_basic_to_ready, 57548e09f215SStefan Weinhuber .online_to_ready = dasd_eckd_online_to_ready, 5755daa991bfSStefan Haberland .basic_to_known = dasd_eckd_basic_to_known, 57561da177e4SLinus Torvalds .fill_geometry = dasd_eckd_fill_geometry, 57571da177e4SLinus Torvalds .start_IO = dasd_start_IO, 57581da177e4SLinus Torvalds .term_IO = dasd_term_IO, 57598e09f215SStefan Weinhuber .handle_terminated_request = dasd_eckd_handle_terminated_request, 57601da177e4SLinus Torvalds .format_device = dasd_eckd_format_device, 57618fd57520SJan Höppner .check_device_format = dasd_eckd_check_device_format, 57621da177e4SLinus Torvalds .erp_action = dasd_eckd_erp_action, 57631da177e4SLinus Torvalds .erp_postaction = dasd_eckd_erp_postaction, 57645a27e60dSStefan Weinhuber .check_for_device_change = dasd_eckd_check_for_device_change, 57658e09f215SStefan Weinhuber .build_cp = dasd_eckd_build_alias_cp, 57668e09f215SStefan Weinhuber .free_cp = dasd_eckd_free_alias_cp, 57671da177e4SLinus Torvalds .dump_sense = dasd_eckd_dump_sense, 5768fc19f381SStefan Haberland .dump_sense_dbf = dasd_eckd_dump_sense_dbf, 57691da177e4SLinus Torvalds .fill_info = dasd_eckd_fill_info, 57701107ccfbSChristoph Hellwig .ioctl = dasd_eckd_ioctl, 5771d41dd122SStefan Haberland .freeze = dasd_eckd_pm_freeze, 5772d41dd122SStefan Haberland .restore = dasd_eckd_restore_device, 5773501183f2SStefan Haberland .reload = dasd_eckd_reload_device, 57742dedf0d9SStefan Haberland .get_uid = dasd_eckd_get_uid, 5775f1633031SStefan Haberland .kick_validate = dasd_eckd_kick_validate_server, 57765db8440cSStefan Haberland .check_attention = dasd_eckd_check_attention, 57775a3b7b11SStefan Haberland .host_access_count = dasd_eckd_host_access_count, 57785a3b7b11SStefan Haberland .hosts_print = dasd_hosts_print, 57791da177e4SLinus Torvalds }; 57801da177e4SLinus Torvalds 57811da177e4SLinus Torvalds static int __init 57821da177e4SLinus Torvalds dasd_eckd_init(void) 57831da177e4SLinus Torvalds { 5784736e6ea0SSebastian Ott int ret; 5785736e6ea0SSebastian Ott 57861da177e4SLinus Torvalds ASCEBC(dasd_eckd_discipline.ebcname, 4); 5787f932bceaSStefan Weinhuber dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), 5788f932bceaSStefan Weinhuber GFP_KERNEL | GFP_DMA); 5789f932bceaSStefan Weinhuber if (!dasd_reserve_req) 5790f932bceaSStefan Weinhuber return -ENOMEM; 5791a4d26c6aSStefan Weinhuber path_verification_worker = kmalloc(sizeof(*path_verification_worker), 5792a4d26c6aSStefan Weinhuber GFP_KERNEL | GFP_DMA); 5793a4d26c6aSStefan Weinhuber if (!path_verification_worker) { 5794a4d26c6aSStefan Weinhuber kfree(dasd_reserve_req); 5795a4d26c6aSStefan Weinhuber return -ENOMEM; 5796a4d26c6aSStefan Weinhuber } 5797558b9ef0SStefan Weinhuber rawpadpage = (void *)__get_free_page(GFP_KERNEL); 5798558b9ef0SStefan Weinhuber if (!rawpadpage) { 5799558b9ef0SStefan Weinhuber kfree(path_verification_worker); 5800558b9ef0SStefan Weinhuber kfree(dasd_reserve_req); 5801558b9ef0SStefan Weinhuber return -ENOMEM; 5802558b9ef0SStefan Weinhuber } 5803736e6ea0SSebastian Ott ret = ccw_driver_register(&dasd_eckd_driver); 5804736e6ea0SSebastian Ott if (!ret) 5805736e6ea0SSebastian Ott wait_for_device_probe(); 5806a4d26c6aSStefan Weinhuber else { 5807a4d26c6aSStefan Weinhuber kfree(path_verification_worker); 5808f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 5809558b9ef0SStefan Weinhuber free_page((unsigned long)rawpadpage); 5810a4d26c6aSStefan Weinhuber } 5811736e6ea0SSebastian Ott return ret; 58121da177e4SLinus Torvalds } 58131da177e4SLinus Torvalds 58141da177e4SLinus Torvalds static void __exit 58151da177e4SLinus Torvalds dasd_eckd_cleanup(void) 58161da177e4SLinus Torvalds { 58171da177e4SLinus Torvalds ccw_driver_unregister(&dasd_eckd_driver); 5818a4d26c6aSStefan Weinhuber kfree(path_verification_worker); 5819f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 5820558b9ef0SStefan Weinhuber free_page((unsigned long)rawpadpage); 58211da177e4SLinus Torvalds } 58221da177e4SLinus Torvalds 58231da177e4SLinus Torvalds module_init(dasd_eckd_init); 58241da177e4SLinus Torvalds module_exit(dasd_eckd_cleanup); 5825