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> 297c0f6ba6SLinus Torvalds #include <linux/uaccess.h> 3040545573SHorst Hummel #include <asm/cio.h> 311da177e4SLinus Torvalds #include <asm/ccwdev.h> 32f3eb5384SStefan Weinhuber #include <asm/itcw.h> 335db8440cSStefan Haberland #include <asm/schid.h> 345db8440cSStefan Haberland #include <asm/chpid.h> 351da177e4SLinus Torvalds 361da177e4SLinus Torvalds #include "dasd_int.h" 371da177e4SLinus Torvalds #include "dasd_eckd.h" 381da177e4SLinus Torvalds 391da177e4SLinus Torvalds #ifdef PRINTK_HEADER 401da177e4SLinus Torvalds #undef PRINTK_HEADER 411da177e4SLinus Torvalds #endif /* PRINTK_HEADER */ 421da177e4SLinus Torvalds #define PRINTK_HEADER "dasd(eckd):" 431da177e4SLinus Torvalds 441da177e4SLinus Torvalds #define ECKD_C0(i) (i->home_bytes) 451da177e4SLinus Torvalds #define ECKD_F(i) (i->formula) 461da177e4SLinus Torvalds #define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\ 471da177e4SLinus Torvalds (i->factors.f_0x02.f1)) 481da177e4SLinus Torvalds #define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\ 491da177e4SLinus Torvalds (i->factors.f_0x02.f2)) 501da177e4SLinus Torvalds #define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\ 511da177e4SLinus Torvalds (i->factors.f_0x02.f3)) 521da177e4SLinus Torvalds #define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0) 531da177e4SLinus Torvalds #define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0) 541da177e4SLinus Torvalds #define ECKD_F6(i) (i->factor6) 551da177e4SLinus Torvalds #define ECKD_F7(i) (i->factor7) 561da177e4SLinus Torvalds #define ECKD_F8(i) (i->factor8) 571da177e4SLinus Torvalds 58e4dbb0f2SStefan Haberland /* 59e4dbb0f2SStefan Haberland * raw track access always map to 64k in memory 60e4dbb0f2SStefan Haberland * so it maps to 16 blocks of 4k per track 61e4dbb0f2SStefan Haberland */ 62e4dbb0f2SStefan Haberland #define DASD_RAW_BLOCK_PER_TRACK 16 63e4dbb0f2SStefan Haberland #define DASD_RAW_BLOCKSIZE 4096 64e4dbb0f2SStefan Haberland /* 64k are 128 x 512 byte sectors */ 65e4dbb0f2SStefan Haberland #define DASD_RAW_SECTORS_PER_TRACK 128 66e4dbb0f2SStefan Haberland 671da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 681da177e4SLinus Torvalds 691da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline; 701da177e4SLinus Torvalds 711da177e4SLinus Torvalds /* The ccw bus type uses this table to find devices that it sends to 721da177e4SLinus Torvalds * dasd_eckd_probe */ 731da177e4SLinus Torvalds static struct ccw_device_id dasd_eckd_ids[] = { 74d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1}, 75d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2}, 765da24b76SStefan Haberland { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3380, 0), .driver_info = 0x3}, 77d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4}, 78d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5}, 79d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6}, 80d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7}, 81d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8}, 82d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9}, 83d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa}, 841da177e4SLinus Torvalds { /* end of list */ }, 851da177e4SLinus Torvalds }; 861da177e4SLinus Torvalds 871da177e4SLinus Torvalds MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids); 881da177e4SLinus Torvalds 891da177e4SLinus Torvalds static struct ccw_driver dasd_eckd_driver; /* see below */ 901da177e4SLinus Torvalds 91558b9ef0SStefan Weinhuber static void *rawpadpage; 92558b9ef0SStefan Weinhuber 93eb6e199bSStefan Weinhuber #define INIT_CQR_OK 0 94eb6e199bSStefan Weinhuber #define INIT_CQR_UNFORMATTED 1 95eb6e199bSStefan Weinhuber #define INIT_CQR_ERROR 2 96eb6e199bSStefan Weinhuber 97f932bceaSStefan Weinhuber /* emergency request for reserve/release */ 98f932bceaSStefan Weinhuber static struct { 99f932bceaSStefan Weinhuber struct dasd_ccw_req cqr; 100f932bceaSStefan Weinhuber struct ccw1 ccw; 101f932bceaSStefan Weinhuber char data[32]; 102f932bceaSStefan Weinhuber } *dasd_reserve_req; 103f932bceaSStefan Weinhuber static DEFINE_MUTEX(dasd_reserve_mutex); 104f932bceaSStefan Weinhuber 105a4d26c6aSStefan Weinhuber /* definitions for the path verification worker */ 106a4d26c6aSStefan Weinhuber struct path_verification_work_data { 107a4d26c6aSStefan Weinhuber struct work_struct worker; 108a4d26c6aSStefan Weinhuber struct dasd_device *device; 109a4d26c6aSStefan Weinhuber struct dasd_ccw_req cqr; 110a4d26c6aSStefan Weinhuber struct ccw1 ccw; 111a4d26c6aSStefan Weinhuber __u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE]; 112a4d26c6aSStefan Weinhuber int isglobal; 113a4d26c6aSStefan Weinhuber __u8 tbvpm; 114a4d26c6aSStefan Weinhuber }; 115a4d26c6aSStefan Weinhuber static struct path_verification_work_data *path_verification_worker; 116a4d26c6aSStefan Weinhuber static DEFINE_MUTEX(dasd_path_verification_mutex); 117eb6e199bSStefan Weinhuber 1185db8440cSStefan Haberland struct check_attention_work_data { 1195db8440cSStefan Haberland struct work_struct worker; 1205db8440cSStefan Haberland struct dasd_device *device; 1215db8440cSStefan Haberland __u8 lpum; 1225db8440cSStefan Haberland }; 1235db8440cSStefan Haberland 1248fd57520SJan Höppner static int prepare_itcw(struct itcw *, unsigned int, unsigned int, int, 1258fd57520SJan Höppner struct dasd_device *, struct dasd_device *, 1268fd57520SJan Höppner unsigned int, int, unsigned int, unsigned int, 1278fd57520SJan Höppner unsigned int, unsigned int); 1288fd57520SJan Höppner 1291da177e4SLinus Torvalds /* initial attempt at a probe function. this can be simplified once 1301da177e4SLinus Torvalds * the other detection code is gone */ 1311da177e4SLinus Torvalds static int 1321da177e4SLinus Torvalds dasd_eckd_probe (struct ccw_device *cdev) 1331da177e4SLinus Torvalds { 1341da177e4SLinus Torvalds int ret; 1351da177e4SLinus Torvalds 13640545573SHorst Hummel /* set ECKD specific ccw-device options */ 137454e1fa1SPeter Oberparleiter ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE | 138454e1fa1SPeter Oberparleiter CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH); 13940545573SHorst Hummel if (ret) { 140b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s", 141b8ed5dd5SStefan Haberland "dasd_eckd_probe: could not set " 142b8ed5dd5SStefan Haberland "ccw-device options"); 1431da177e4SLinus Torvalds return ret; 14440545573SHorst Hummel } 14540545573SHorst Hummel ret = dasd_generic_probe(cdev, &dasd_eckd_discipline); 14640545573SHorst Hummel return ret; 1471da177e4SLinus Torvalds } 1481da177e4SLinus Torvalds 1491da177e4SLinus Torvalds static int 1501da177e4SLinus Torvalds dasd_eckd_set_online(struct ccw_device *cdev) 1511da177e4SLinus Torvalds { 1521da177e4SLinus Torvalds return dasd_generic_set_online(cdev, &dasd_eckd_discipline); 1531da177e4SLinus Torvalds } 1541da177e4SLinus Torvalds 1551da177e4SLinus Torvalds static const int sizes_trk0[] = { 28, 148, 84 }; 1561da177e4SLinus Torvalds #define LABEL_SIZE 140 1571da177e4SLinus Torvalds 1583bc9fef9SStefan Haberland /* head and record addresses of count_area read in analysis ccw */ 1593bc9fef9SStefan Haberland static const int count_area_head[] = { 0, 0, 0, 0, 2 }; 1603bc9fef9SStefan Haberland static const int count_area_rec[] = { 1, 2, 3, 4, 1 }; 1613bc9fef9SStefan Haberland 1621da177e4SLinus Torvalds static inline unsigned int 1631da177e4SLinus Torvalds round_up_multiple(unsigned int no, unsigned int mult) 1641da177e4SLinus Torvalds { 1651da177e4SLinus Torvalds int rem = no % mult; 1661da177e4SLinus Torvalds return (rem ? no - rem + mult : no); 1671da177e4SLinus Torvalds } 1681da177e4SLinus Torvalds 1691da177e4SLinus Torvalds static inline unsigned int 1701da177e4SLinus Torvalds ceil_quot(unsigned int d1, unsigned int d2) 1711da177e4SLinus Torvalds { 1721da177e4SLinus Torvalds return (d1 + (d2 - 1)) / d2; 1731da177e4SLinus Torvalds } 1741da177e4SLinus Torvalds 1754d284cacSHeiko Carstens static unsigned int 1761da177e4SLinus Torvalds recs_per_track(struct dasd_eckd_characteristics * rdc, 1771da177e4SLinus Torvalds unsigned int kl, unsigned int dl) 1781da177e4SLinus Torvalds { 1791da177e4SLinus Torvalds int dn, kn; 1801da177e4SLinus Torvalds 1811da177e4SLinus Torvalds switch (rdc->dev_type) { 1821da177e4SLinus Torvalds case 0x3380: 1831da177e4SLinus Torvalds if (kl) 1841da177e4SLinus Torvalds return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + 1851da177e4SLinus Torvalds ceil_quot(dl + 12, 32)); 1861da177e4SLinus Torvalds else 1871da177e4SLinus Torvalds return 1499 / (15 + ceil_quot(dl + 12, 32)); 1881da177e4SLinus Torvalds case 0x3390: 1891da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1901da177e4SLinus Torvalds if (kl) { 1911da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1921da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + 1931da177e4SLinus Torvalds 9 + ceil_quot(dl + 6 * dn, 34)); 1941da177e4SLinus Torvalds } else 1951da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); 1961da177e4SLinus Torvalds case 0x9345: 1971da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1981da177e4SLinus Torvalds if (kl) { 1991da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 2001da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + 2011da177e4SLinus Torvalds ceil_quot(dl + 6 * dn, 34)); 2021da177e4SLinus Torvalds } else 2031da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); 2041da177e4SLinus Torvalds } 2051da177e4SLinus Torvalds return 0; 2061da177e4SLinus Torvalds } 2071da177e4SLinus Torvalds 208b44b0ab3SStefan Weinhuber static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head) 209b44b0ab3SStefan Weinhuber { 210b44b0ab3SStefan Weinhuber geo->cyl = (__u16) cyl; 211b44b0ab3SStefan Weinhuber geo->head = cyl >> 16; 212b44b0ab3SStefan Weinhuber geo->head <<= 4; 213b44b0ab3SStefan Weinhuber geo->head |= head; 214b44b0ab3SStefan Weinhuber } 215b44b0ab3SStefan Weinhuber 2164d284cacSHeiko Carstens static int 2171da177e4SLinus Torvalds check_XRC (struct ccw1 *de_ccw, 2181da177e4SLinus Torvalds struct DE_eckd_data *data, 2191da177e4SLinus Torvalds struct dasd_device *device) 2201da177e4SLinus Torvalds { 221543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 222d54853efSMartin Schwidefsky int rc; 2231da177e4SLinus Torvalds 224d54853efSMartin Schwidefsky if (!private->rdc_data.facilities.XRC_supported) 225d54853efSMartin Schwidefsky return 0; 2261da177e4SLinus Torvalds 2271da177e4SLinus Torvalds /* switch on System Time Stamp - needed for XRC Support */ 2281da177e4SLinus Torvalds data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ 2291da177e4SLinus Torvalds data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ 2301da177e4SLinus Torvalds 23140277891SMartin Schwidefsky rc = get_phys_clock(&data->ep_sys_time); 232d54853efSMartin Schwidefsky /* Ignore return code if sync clock is switched off. */ 233a8f6db4dSHeiko Carstens if (rc == -EOPNOTSUPP || rc == -EACCES) 234d54853efSMartin Schwidefsky rc = 0; 2351da177e4SLinus Torvalds 2361da177e4SLinus Torvalds de_ccw->count = sizeof(struct DE_eckd_data); 2371da177e4SLinus Torvalds de_ccw->flags |= CCW_FLAG_SLI; 238d54853efSMartin Schwidefsky return rc; 2391da177e4SLinus Torvalds } 2401da177e4SLinus Torvalds 2414d284cacSHeiko Carstens static int 242b44b0ab3SStefan Weinhuber define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk, 243b44b0ab3SStefan Weinhuber unsigned int totrk, int cmd, struct dasd_device *device) 2441da177e4SLinus Torvalds { 245543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 246b44b0ab3SStefan Weinhuber u32 begcyl, endcyl; 247b44b0ab3SStefan Weinhuber u16 heads, beghead, endhead; 248d54853efSMartin Schwidefsky int rc = 0; 2491da177e4SLinus Torvalds 2501da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; 2511da177e4SLinus Torvalds ccw->flags = 0; 2521da177e4SLinus Torvalds ccw->count = 16; 2531da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 2541da177e4SLinus Torvalds 2551da177e4SLinus Torvalds memset(data, 0, sizeof(struct DE_eckd_data)); 2561da177e4SLinus Torvalds switch (cmd) { 2571da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 2581da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 2591da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 2601da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 2611da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 2621da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 2631da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 2641da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 2651da177e4SLinus Torvalds data->mask.perm = 0x1; 2661da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 2671da177e4SLinus Torvalds break; 2688fd57520SJan Höppner case DASD_ECKD_CCW_READ_COUNT: 2698fd57520SJan Höppner data->mask.perm = 0x1; 2708fd57520SJan Höppner data->attributes.operation = DASD_BYPASS_CACHE; 2718fd57520SJan Höppner break; 2721da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 2731da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 2741da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 2751da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 2761da177e4SLinus Torvalds data->mask.perm = 0x02; 2771da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 278d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2791da177e4SLinus Torvalds break; 2801da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 2811da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 2821da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 283d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2841da177e4SLinus Torvalds break; 2851da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 2861da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 2871da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 2881da177e4SLinus Torvalds data->mask.perm = 0x3; 2891da177e4SLinus Torvalds data->mask.auth = 0x1; 2901da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 291d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2921da177e4SLinus Torvalds break; 2931da177e4SLinus Torvalds default: 294fc19f381SStefan Haberland dev_err(&device->cdev->dev, 295fc19f381SStefan Haberland "0x%x is not a known command\n", cmd); 2961da177e4SLinus Torvalds break; 2971da177e4SLinus Torvalds } 2981da177e4SLinus Torvalds 2991da177e4SLinus Torvalds data->attributes.mode = 0x3; /* ECKD */ 3001da177e4SLinus Torvalds 3011da177e4SLinus Torvalds if ((private->rdc_data.cu_type == 0x2105 || 3021da177e4SLinus Torvalds private->rdc_data.cu_type == 0x2107 || 3031da177e4SLinus Torvalds private->rdc_data.cu_type == 0x1750) 3041da177e4SLinus Torvalds && !(private->uses_cdl && trk < 2)) 3051da177e4SLinus Torvalds data->ga_extended |= 0x40; /* Regular Data Format Mode */ 3061da177e4SLinus Torvalds 307b44b0ab3SStefan Weinhuber heads = private->rdc_data.trk_per_cyl; 308b44b0ab3SStefan Weinhuber begcyl = trk / heads; 309b44b0ab3SStefan Weinhuber beghead = trk % heads; 310b44b0ab3SStefan Weinhuber endcyl = totrk / heads; 311b44b0ab3SStefan Weinhuber endhead = totrk % heads; 3121da177e4SLinus Torvalds 3131da177e4SLinus Torvalds /* check for sequential prestage - enhance cylinder range */ 3141da177e4SLinus Torvalds if (data->attributes.operation == DASD_SEQ_PRESTAGE || 3151da177e4SLinus Torvalds data->attributes.operation == DASD_SEQ_ACCESS) { 3161da177e4SLinus Torvalds 317b44b0ab3SStefan Weinhuber if (endcyl + private->attrib.nr_cyl < private->real_cyl) 318b44b0ab3SStefan Weinhuber endcyl += private->attrib.nr_cyl; 3191da177e4SLinus Torvalds else 320b44b0ab3SStefan Weinhuber endcyl = (private->real_cyl - 1); 3211da177e4SLinus Torvalds } 3221da177e4SLinus Torvalds 323b44b0ab3SStefan Weinhuber set_ch_t(&data->beg_ext, begcyl, beghead); 324b44b0ab3SStefan Weinhuber set_ch_t(&data->end_ext, endcyl, endhead); 325d54853efSMartin Schwidefsky return rc; 3261da177e4SLinus Torvalds } 3271da177e4SLinus Torvalds 3288e09f215SStefan Weinhuber static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata, 3298e09f215SStefan Weinhuber struct dasd_device *device) 3308e09f215SStefan Weinhuber { 331543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 3328e09f215SStefan Weinhuber int rc; 3338e09f215SStefan Weinhuber 3348e09f215SStefan Weinhuber if (!private->rdc_data.facilities.XRC_supported) 3358e09f215SStefan Weinhuber return 0; 3368e09f215SStefan Weinhuber 3378e09f215SStefan Weinhuber /* switch on System Time Stamp - needed for XRC Support */ 338f3eb5384SStefan Weinhuber pfxdata->define_extent.ga_extended |= 0x08; /* 'Time Stamp Valid' */ 339f3eb5384SStefan Weinhuber pfxdata->define_extent.ga_extended |= 0x02; /* 'Extended Parameter' */ 3408e09f215SStefan Weinhuber pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */ 3418e09f215SStefan Weinhuber 34240277891SMartin Schwidefsky rc = get_phys_clock(&pfxdata->define_extent.ep_sys_time); 3438e09f215SStefan Weinhuber /* Ignore return code if sync clock is switched off. */ 344a8f6db4dSHeiko Carstens if (rc == -EOPNOTSUPP || rc == -EACCES) 3458e09f215SStefan Weinhuber rc = 0; 3468e09f215SStefan Weinhuber return rc; 3478e09f215SStefan Weinhuber } 3488e09f215SStefan Weinhuber 349f3eb5384SStefan Weinhuber static void fill_LRE_data(struct LRE_eckd_data *data, unsigned int trk, 350f3eb5384SStefan Weinhuber unsigned int rec_on_trk, int count, int cmd, 351f3eb5384SStefan Weinhuber struct dasd_device *device, unsigned int reclen, 352f3eb5384SStefan Weinhuber unsigned int tlf) 353f3eb5384SStefan Weinhuber { 354543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 355f3eb5384SStefan Weinhuber int sector; 356f3eb5384SStefan Weinhuber int dn, d; 357f3eb5384SStefan Weinhuber 358f3eb5384SStefan Weinhuber memset(data, 0, sizeof(*data)); 359f3eb5384SStefan Weinhuber sector = 0; 360f3eb5384SStefan Weinhuber if (rec_on_trk) { 361f3eb5384SStefan Weinhuber switch (private->rdc_data.dev_type) { 362f3eb5384SStefan Weinhuber case 0x3390: 363f3eb5384SStefan Weinhuber dn = ceil_quot(reclen + 6, 232); 364f3eb5384SStefan Weinhuber d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 365f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 366f3eb5384SStefan Weinhuber break; 367f3eb5384SStefan Weinhuber case 0x3380: 368f3eb5384SStefan Weinhuber d = 7 + ceil_quot(reclen + 12, 32); 369f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 370f3eb5384SStefan Weinhuber break; 371f3eb5384SStefan Weinhuber } 372f3eb5384SStefan Weinhuber } 373f3eb5384SStefan Weinhuber data->sector = sector; 374f3eb5384SStefan Weinhuber /* note: meaning of count depends on the operation 375f3eb5384SStefan Weinhuber * for record based I/O it's the number of records, but for 376f3eb5384SStefan Weinhuber * track based I/O it's the number of tracks 377f3eb5384SStefan Weinhuber */ 378f3eb5384SStefan Weinhuber data->count = count; 379f3eb5384SStefan Weinhuber switch (cmd) { 380f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 381f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 382f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 383f3eb5384SStefan Weinhuber break; 384f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_HOME_ADDRESS: 385f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 386f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 387f3eb5384SStefan Weinhuber break; 388f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 389f3eb5384SStefan Weinhuber data->operation.orientation = 0x1; 390f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 391f3eb5384SStefan Weinhuber data->count++; 392f3eb5384SStefan Weinhuber break; 393f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_RECORD_ZERO: 394f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 395f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 396f3eb5384SStefan Weinhuber data->count++; 397f3eb5384SStefan Weinhuber break; 398f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE: 399f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_MT: 400f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD: 401f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD_MT: 402f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 403f3eb5384SStefan Weinhuber data->length = reclen; 404f3eb5384SStefan Weinhuber data->operation.operation = 0x01; 405f3eb5384SStefan Weinhuber break; 406f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD: 407f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD_MT: 408f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 409f3eb5384SStefan Weinhuber data->length = reclen; 410f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 411f3eb5384SStefan Weinhuber break; 412e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_WRITE_FULL_TRACK: 413e4dbb0f2SStefan Haberland data->operation.orientation = 0x0; 414e4dbb0f2SStefan Haberland data->operation.operation = 0x3F; 415e4dbb0f2SStefan Haberland data->extended_operation = 0x11; 416e4dbb0f2SStefan Haberland data->length = 0; 417e4dbb0f2SStefan Haberland data->extended_parameter_length = 0x02; 418e4dbb0f2SStefan Haberland if (data->count > 8) { 419e4dbb0f2SStefan Haberland data->extended_parameter[0] = 0xFF; 420e4dbb0f2SStefan Haberland data->extended_parameter[1] = 0xFF; 421e4dbb0f2SStefan Haberland data->extended_parameter[1] <<= (16 - count); 422e4dbb0f2SStefan Haberland } else { 423e4dbb0f2SStefan Haberland data->extended_parameter[0] = 0xFF; 424e4dbb0f2SStefan Haberland data->extended_parameter[0] <<= (8 - count); 425e4dbb0f2SStefan Haberland data->extended_parameter[1] = 0x00; 426e4dbb0f2SStefan Haberland } 427e4dbb0f2SStefan Haberland data->sector = 0xFF; 428e4dbb0f2SStefan Haberland break; 429f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 430f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 431f3eb5384SStefan Weinhuber data->length = reclen; /* not tlf, as one might think */ 432f3eb5384SStefan Weinhuber data->operation.operation = 0x3F; 433f3eb5384SStefan Weinhuber data->extended_operation = 0x23; 434f3eb5384SStefan Weinhuber break; 435f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ: 436f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_MT: 437f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_KD: 438f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_KD_MT: 439f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 440f3eb5384SStefan Weinhuber data->length = reclen; 441f3eb5384SStefan Weinhuber data->operation.operation = 0x06; 442f3eb5384SStefan Weinhuber break; 443f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD: 444f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD_MT: 445f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 446f3eb5384SStefan Weinhuber data->length = reclen; 447f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 448f3eb5384SStefan Weinhuber break; 449f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_COUNT: 450f3eb5384SStefan Weinhuber data->operation.operation = 0x06; 451f3eb5384SStefan Weinhuber break; 452e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_READ_TRACK: 453e4dbb0f2SStefan Haberland data->operation.orientation = 0x1; 454e4dbb0f2SStefan Haberland data->operation.operation = 0x0C; 455e4dbb0f2SStefan Haberland data->extended_parameter_length = 0; 456e4dbb0f2SStefan Haberland data->sector = 0xFF; 457e4dbb0f2SStefan Haberland break; 458f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 459f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 460f3eb5384SStefan Weinhuber data->length = tlf; 461f3eb5384SStefan Weinhuber data->operation.operation = 0x0C; 462f3eb5384SStefan Weinhuber break; 463f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_ERASE: 464f3eb5384SStefan Weinhuber data->length = reclen; 465f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 466f3eb5384SStefan Weinhuber data->operation.operation = 0x0b; 467f3eb5384SStefan Weinhuber break; 468f3eb5384SStefan Weinhuber default: 469f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, device, 470f3eb5384SStefan Weinhuber "fill LRE unknown opcode 0x%x", cmd); 471f3eb5384SStefan Weinhuber BUG(); 472f3eb5384SStefan Weinhuber } 473f3eb5384SStefan Weinhuber set_ch_t(&data->seek_addr, 474f3eb5384SStefan Weinhuber trk / private->rdc_data.trk_per_cyl, 475f3eb5384SStefan Weinhuber trk % private->rdc_data.trk_per_cyl); 476f3eb5384SStefan Weinhuber data->search_arg.cyl = data->seek_addr.cyl; 477f3eb5384SStefan Weinhuber data->search_arg.head = data->seek_addr.head; 478f3eb5384SStefan Weinhuber data->search_arg.record = rec_on_trk; 479f3eb5384SStefan Weinhuber } 480f3eb5384SStefan Weinhuber 481f3eb5384SStefan Weinhuber static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 482b44b0ab3SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 483f3eb5384SStefan Weinhuber struct dasd_device *basedev, struct dasd_device *startdev, 484f3eb5384SStefan Weinhuber unsigned char format, unsigned int rec_on_trk, int count, 485f3eb5384SStefan Weinhuber unsigned int blksize, unsigned int tlf) 4868e09f215SStefan Weinhuber { 4878e09f215SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 488f3eb5384SStefan Weinhuber struct DE_eckd_data *dedata; 489f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 490b44b0ab3SStefan Weinhuber u32 begcyl, endcyl; 491b44b0ab3SStefan Weinhuber u16 heads, beghead, endhead; 4928e09f215SStefan Weinhuber int rc = 0; 4938e09f215SStefan Weinhuber 494543691a4SSebastian Ott basepriv = basedev->private; 495543691a4SSebastian Ott startpriv = startdev->private; 496f3eb5384SStefan Weinhuber dedata = &pfxdata->define_extent; 497f3eb5384SStefan Weinhuber lredata = &pfxdata->locate_record; 4988e09f215SStefan Weinhuber 4998e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PFX; 5008e09f215SStefan Weinhuber ccw->flags = 0; 501e4dbb0f2SStefan Haberland if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) { 502e4dbb0f2SStefan Haberland ccw->count = sizeof(*pfxdata) + 2; 503e4dbb0f2SStefan Haberland ccw->cda = (__u32) __pa(pfxdata); 504e4dbb0f2SStefan Haberland memset(pfxdata, 0, sizeof(*pfxdata) + 2); 505e4dbb0f2SStefan Haberland } else { 5068e09f215SStefan Weinhuber ccw->count = sizeof(*pfxdata); 5078e09f215SStefan Weinhuber ccw->cda = (__u32) __pa(pfxdata); 5088e09f215SStefan Weinhuber memset(pfxdata, 0, sizeof(*pfxdata)); 509e4dbb0f2SStefan Haberland } 510e4dbb0f2SStefan Haberland 5118e09f215SStefan Weinhuber /* prefix data */ 512f3eb5384SStefan Weinhuber if (format > 1) { 513f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 514f3eb5384SStefan Weinhuber "PFX LRE unknown format 0x%x", format); 515f3eb5384SStefan Weinhuber BUG(); 516f3eb5384SStefan Weinhuber return -EINVAL; 517f3eb5384SStefan Weinhuber } 518f3eb5384SStefan Weinhuber pfxdata->format = format; 5194abb08c2SStefan Weinhuber pfxdata->base_address = basepriv->ned->unit_addr; 5204abb08c2SStefan Weinhuber pfxdata->base_lss = basepriv->ned->ID; 521f3eb5384SStefan Weinhuber pfxdata->validity.define_extent = 1; 5228e09f215SStefan Weinhuber 5238e09f215SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 5248e09f215SStefan Weinhuber if (startpriv->uid.type != UA_BASE_DEVICE) { 5258e09f215SStefan Weinhuber pfxdata->validity.verify_base = 1; 5268e09f215SStefan Weinhuber if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 5278e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 1; 5288e09f215SStefan Weinhuber } 5298e09f215SStefan Weinhuber 5308e09f215SStefan Weinhuber /* define extend data (mostly)*/ 5318e09f215SStefan Weinhuber switch (cmd) { 5328e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_HOME_ADDRESS: 5338e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_RECORD_ZERO: 5348e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ: 5358e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_MT: 5368e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD: 5378e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD_MT: 5388e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_KD: 5398e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_KD_MT: 540f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 541f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 542f3eb5384SStefan Weinhuber break; 5438fd57520SJan Höppner case DASD_ECKD_CCW_READ_COUNT: 5448fd57520SJan Höppner dedata->mask.perm = 0x1; 5458fd57520SJan Höppner dedata->attributes.operation = DASD_BYPASS_CACHE; 5468fd57520SJan Höppner break; 547e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_READ_TRACK: 548f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 549f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 550f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 551f3eb5384SStefan Weinhuber dedata->blk_size = 0; 5528e09f215SStefan Weinhuber break; 5538e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE: 5548e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_MT: 5558e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD: 5568e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD_MT: 557f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 558f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 5598e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 5608e09f215SStefan Weinhuber break; 5618e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD: 5628e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD_MT: 563f3eb5384SStefan Weinhuber dedata->attributes.operation = DASD_BYPASS_CACHE; 5648e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 5658e09f215SStefan Weinhuber break; 5668e09f215SStefan Weinhuber case DASD_ECKD_CCW_ERASE: 5678e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 5688e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 569f3eb5384SStefan Weinhuber dedata->mask.perm = 0x3; 570f3eb5384SStefan Weinhuber dedata->mask.auth = 0x1; 571f3eb5384SStefan Weinhuber dedata->attributes.operation = DASD_BYPASS_CACHE; 572f3eb5384SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 573f3eb5384SStefan Weinhuber break; 574e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_WRITE_FULL_TRACK: 575e4dbb0f2SStefan Haberland dedata->mask.perm = 0x03; 576e4dbb0f2SStefan Haberland dedata->attributes.operation = basepriv->attrib.operation; 577e4dbb0f2SStefan Haberland dedata->blk_size = 0; 578e4dbb0f2SStefan Haberland break; 579f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 580f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 581f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 582f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 5838e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 5848e09f215SStefan Weinhuber break; 5858e09f215SStefan Weinhuber default: 586f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 587f3eb5384SStefan Weinhuber "PFX LRE unknown opcode 0x%x", cmd); 588f3eb5384SStefan Weinhuber BUG(); 589f3eb5384SStefan Weinhuber return -EINVAL; 5908e09f215SStefan Weinhuber } 5918e09f215SStefan Weinhuber 592f3eb5384SStefan Weinhuber dedata->attributes.mode = 0x3; /* ECKD */ 5938e09f215SStefan Weinhuber 5948e09f215SStefan Weinhuber if ((basepriv->rdc_data.cu_type == 0x2105 || 5958e09f215SStefan Weinhuber basepriv->rdc_data.cu_type == 0x2107 || 5968e09f215SStefan Weinhuber basepriv->rdc_data.cu_type == 0x1750) 5978e09f215SStefan Weinhuber && !(basepriv->uses_cdl && trk < 2)) 598f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x40; /* Regular Data Format Mode */ 5998e09f215SStefan Weinhuber 600b44b0ab3SStefan Weinhuber heads = basepriv->rdc_data.trk_per_cyl; 601b44b0ab3SStefan Weinhuber begcyl = trk / heads; 602b44b0ab3SStefan Weinhuber beghead = trk % heads; 603b44b0ab3SStefan Weinhuber endcyl = totrk / heads; 604b44b0ab3SStefan Weinhuber endhead = totrk % heads; 6058e09f215SStefan Weinhuber 6068e09f215SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 607f3eb5384SStefan Weinhuber if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 608f3eb5384SStefan Weinhuber dedata->attributes.operation == DASD_SEQ_ACCESS) { 6098e09f215SStefan Weinhuber 610b44b0ab3SStefan Weinhuber if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 611b44b0ab3SStefan Weinhuber endcyl += basepriv->attrib.nr_cyl; 6128e09f215SStefan Weinhuber else 613b44b0ab3SStefan Weinhuber endcyl = (basepriv->real_cyl - 1); 6148e09f215SStefan Weinhuber } 6158e09f215SStefan Weinhuber 616f3eb5384SStefan Weinhuber set_ch_t(&dedata->beg_ext, begcyl, beghead); 617f3eb5384SStefan Weinhuber set_ch_t(&dedata->end_ext, endcyl, endhead); 618f3eb5384SStefan Weinhuber 619f3eb5384SStefan Weinhuber if (format == 1) { 620f3eb5384SStefan Weinhuber fill_LRE_data(lredata, trk, rec_on_trk, count, cmd, 621f3eb5384SStefan Weinhuber basedev, blksize, tlf); 622f3eb5384SStefan Weinhuber } 623f3eb5384SStefan Weinhuber 6248e09f215SStefan Weinhuber return rc; 6258e09f215SStefan Weinhuber } 6268e09f215SStefan Weinhuber 627f3eb5384SStefan Weinhuber static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 628f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 629f3eb5384SStefan Weinhuber struct dasd_device *basedev, struct dasd_device *startdev) 630f3eb5384SStefan Weinhuber { 631f3eb5384SStefan Weinhuber return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev, 632f3eb5384SStefan Weinhuber 0, 0, 0, 0, 0); 633f3eb5384SStefan Weinhuber } 634f3eb5384SStefan Weinhuber 6354d284cacSHeiko Carstens static void 636b44b0ab3SStefan Weinhuber locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk, 637b44b0ab3SStefan Weinhuber unsigned int rec_on_trk, int no_rec, int cmd, 6381da177e4SLinus Torvalds struct dasd_device * device, int reclen) 6391da177e4SLinus Torvalds { 640543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 6411da177e4SLinus Torvalds int sector; 6421da177e4SLinus Torvalds int dn, d; 6431da177e4SLinus Torvalds 6441da177e4SLinus Torvalds DBF_DEV_EVENT(DBF_INFO, device, 6451da177e4SLinus Torvalds "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", 6461da177e4SLinus Torvalds trk, rec_on_trk, no_rec, cmd, reclen); 6471da177e4SLinus Torvalds 6481da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; 6491da177e4SLinus Torvalds ccw->flags = 0; 6501da177e4SLinus Torvalds ccw->count = 16; 6511da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 6521da177e4SLinus Torvalds 6531da177e4SLinus Torvalds memset(data, 0, sizeof(struct LO_eckd_data)); 6541da177e4SLinus Torvalds sector = 0; 6551da177e4SLinus Torvalds if (rec_on_trk) { 6561da177e4SLinus Torvalds switch (private->rdc_data.dev_type) { 6571da177e4SLinus Torvalds case 0x3390: 6581da177e4SLinus Torvalds dn = ceil_quot(reclen + 6, 232); 6591da177e4SLinus Torvalds d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 6601da177e4SLinus Torvalds sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 6611da177e4SLinus Torvalds break; 6621da177e4SLinus Torvalds case 0x3380: 6631da177e4SLinus Torvalds d = 7 + ceil_quot(reclen + 12, 32); 6641da177e4SLinus Torvalds sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 6651da177e4SLinus Torvalds break; 6661da177e4SLinus Torvalds } 6671da177e4SLinus Torvalds } 6681da177e4SLinus Torvalds data->sector = sector; 6691da177e4SLinus Torvalds data->count = no_rec; 6701da177e4SLinus Torvalds switch (cmd) { 6711da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 6721da177e4SLinus Torvalds data->operation.orientation = 0x3; 6731da177e4SLinus Torvalds data->operation.operation = 0x03; 6741da177e4SLinus Torvalds break; 6751da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 6761da177e4SLinus Torvalds data->operation.orientation = 0x3; 6771da177e4SLinus Torvalds data->operation.operation = 0x16; 6781da177e4SLinus Torvalds break; 6791da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 6801da177e4SLinus Torvalds data->operation.orientation = 0x1; 6811da177e4SLinus Torvalds data->operation.operation = 0x03; 6821da177e4SLinus Torvalds data->count++; 6831da177e4SLinus Torvalds break; 6841da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 6851da177e4SLinus Torvalds data->operation.orientation = 0x3; 6861da177e4SLinus Torvalds data->operation.operation = 0x16; 6871da177e4SLinus Torvalds data->count++; 6881da177e4SLinus Torvalds break; 6891da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 6901da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 6911da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 6921da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 6931da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6941da177e4SLinus Torvalds data->length = reclen; 6951da177e4SLinus Torvalds data->operation.operation = 0x01; 6961da177e4SLinus Torvalds break; 6971da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 6981da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 6991da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 7001da177e4SLinus Torvalds data->length = reclen; 7011da177e4SLinus Torvalds data->operation.operation = 0x03; 7021da177e4SLinus Torvalds break; 7031da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 7041da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 7051da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 7061da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 7071da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 7081da177e4SLinus Torvalds data->length = reclen; 7091da177e4SLinus Torvalds data->operation.operation = 0x06; 7101da177e4SLinus Torvalds break; 7111da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 7121da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 7131da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 7141da177e4SLinus Torvalds data->length = reclen; 7151da177e4SLinus Torvalds data->operation.operation = 0x16; 7161da177e4SLinus Torvalds break; 7171da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_COUNT: 7181da177e4SLinus Torvalds data->operation.operation = 0x06; 7191da177e4SLinus Torvalds break; 7201da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 7211da177e4SLinus Torvalds data->length = reclen; 7221da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 7231da177e4SLinus Torvalds data->operation.operation = 0x0b; 7241da177e4SLinus Torvalds break; 7251da177e4SLinus Torvalds default: 726fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record " 727fc19f381SStefan Haberland "opcode 0x%x", cmd); 7281da177e4SLinus Torvalds } 729b44b0ab3SStefan Weinhuber set_ch_t(&data->seek_addr, 730b44b0ab3SStefan Weinhuber trk / private->rdc_data.trk_per_cyl, 731b44b0ab3SStefan Weinhuber trk % private->rdc_data.trk_per_cyl); 732b44b0ab3SStefan Weinhuber data->search_arg.cyl = data->seek_addr.cyl; 733b44b0ab3SStefan Weinhuber data->search_arg.head = data->seek_addr.head; 7341da177e4SLinus Torvalds data->search_arg.record = rec_on_trk; 7351da177e4SLinus Torvalds } 7361da177e4SLinus Torvalds 7371da177e4SLinus Torvalds /* 7381da177e4SLinus Torvalds * Returns 1 if the block is one of the special blocks that needs 7391da177e4SLinus Torvalds * to get read/written with the KD variant of the command. 7401da177e4SLinus Torvalds * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and 7411da177e4SLinus Torvalds * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. 7421da177e4SLinus Torvalds * Luckily the KD variants differ only by one bit (0x08) from the 7431da177e4SLinus Torvalds * normal variant. So don't wonder about code like: 7441da177e4SLinus Torvalds * if (dasd_eckd_cdl_special(blk_per_trk, recid)) 7451da177e4SLinus Torvalds * ccw->cmd_code |= 0x8; 7461da177e4SLinus Torvalds */ 7471da177e4SLinus Torvalds static inline int 7481da177e4SLinus Torvalds dasd_eckd_cdl_special(int blk_per_trk, int recid) 7491da177e4SLinus Torvalds { 7501da177e4SLinus Torvalds if (recid < 3) 7511da177e4SLinus Torvalds return 1; 7521da177e4SLinus Torvalds if (recid < blk_per_trk) 7531da177e4SLinus Torvalds return 0; 7541da177e4SLinus Torvalds if (recid < 2 * blk_per_trk) 7551da177e4SLinus Torvalds return 1; 7561da177e4SLinus Torvalds return 0; 7571da177e4SLinus Torvalds } 7581da177e4SLinus Torvalds 7591da177e4SLinus Torvalds /* 7601da177e4SLinus Torvalds * Returns the record size for the special blocks of the cdl format. 7611da177e4SLinus Torvalds * Only returns something useful if dasd_eckd_cdl_special is true 7621da177e4SLinus Torvalds * for the recid. 7631da177e4SLinus Torvalds */ 7641da177e4SLinus Torvalds static inline int 7651da177e4SLinus Torvalds dasd_eckd_cdl_reclen(int recid) 7661da177e4SLinus Torvalds { 7671da177e4SLinus Torvalds if (recid < 3) 7681da177e4SLinus Torvalds return sizes_trk0[recid]; 7691da177e4SLinus Torvalds return LABEL_SIZE; 7701da177e4SLinus Torvalds } 771b206181dSStefan Haberland /* create unique id from private structure. */ 772b206181dSStefan Haberland static void create_uid(struct dasd_eckd_private *private) 7733d052595SHorst Hummel { 7744abb08c2SStefan Weinhuber int count; 775b206181dSStefan Haberland struct dasd_uid *uid; 7763d052595SHorst Hummel 7772dedf0d9SStefan Haberland uid = &private->uid; 7783d052595SHorst Hummel memset(uid, 0, sizeof(struct dasd_uid)); 7794abb08c2SStefan Weinhuber memcpy(uid->vendor, private->ned->HDA_manufacturer, 7803d052595SHorst Hummel sizeof(uid->vendor) - 1); 7813d052595SHorst Hummel EBCASC(uid->vendor, sizeof(uid->vendor) - 1); 7824abb08c2SStefan Weinhuber memcpy(uid->serial, private->ned->HDA_location, 7833d052595SHorst Hummel sizeof(uid->serial) - 1); 7843d052595SHorst Hummel EBCASC(uid->serial, sizeof(uid->serial) - 1); 7854abb08c2SStefan Weinhuber uid->ssid = private->gneq->subsystemID; 786a419aef8SJoe Perches uid->real_unit_addr = private->ned->unit_addr; 7874abb08c2SStefan Weinhuber if (private->sneq) { 7884abb08c2SStefan Weinhuber uid->type = private->sneq->sua_flags; 7898e09f215SStefan Weinhuber if (uid->type == UA_BASE_PAV_ALIAS) 7904abb08c2SStefan Weinhuber uid->base_unit_addr = private->sneq->base_unit_addr; 7918e09f215SStefan Weinhuber } else { 7928e09f215SStefan Weinhuber uid->type = UA_BASE_DEVICE; 7938e09f215SStefan Weinhuber } 7944abb08c2SStefan Weinhuber if (private->vdsneq) { 7954abb08c2SStefan Weinhuber for (count = 0; count < 16; count++) { 7964abb08c2SStefan Weinhuber sprintf(uid->vduit+2*count, "%02x", 7974abb08c2SStefan Weinhuber private->vdsneq->uit[count]); 7984abb08c2SStefan Weinhuber } 7994abb08c2SStefan Weinhuber } 800b206181dSStefan Haberland } 801b206181dSStefan Haberland 802b206181dSStefan Haberland /* 803b206181dSStefan Haberland * Generate device unique id that specifies the physical device. 804b206181dSStefan Haberland */ 805b206181dSStefan Haberland static int dasd_eckd_generate_uid(struct dasd_device *device) 806b206181dSStefan Haberland { 807543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 808b206181dSStefan Haberland unsigned long flags; 809b206181dSStefan Haberland 810b206181dSStefan Haberland if (!private) 811b206181dSStefan Haberland return -ENODEV; 812b206181dSStefan Haberland if (!private->ned || !private->gneq) 813b206181dSStefan Haberland return -ENODEV; 814b206181dSStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 815b206181dSStefan Haberland create_uid(private); 8162dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 8173d052595SHorst Hummel return 0; 8183d052595SHorst Hummel } 8193d052595SHorst Hummel 8202dedf0d9SStefan Haberland static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid) 8212dedf0d9SStefan Haberland { 822543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 8232dedf0d9SStefan Haberland unsigned long flags; 8242dedf0d9SStefan Haberland 825543691a4SSebastian Ott if (private) { 8262dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 8272dedf0d9SStefan Haberland *uid = private->uid; 8282dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 8292dedf0d9SStefan Haberland return 0; 8302dedf0d9SStefan Haberland } 8312dedf0d9SStefan Haberland return -EINVAL; 8322dedf0d9SStefan Haberland } 8332dedf0d9SStefan Haberland 834b206181dSStefan Haberland /* 835b206181dSStefan Haberland * compare device UID with data of a given dasd_eckd_private structure 836b206181dSStefan Haberland * return 0 for match 837b206181dSStefan Haberland */ 838b206181dSStefan Haberland static int dasd_eckd_compare_path_uid(struct dasd_device *device, 839b206181dSStefan Haberland struct dasd_eckd_private *private) 840b206181dSStefan Haberland { 841b206181dSStefan Haberland struct dasd_uid device_uid; 842b206181dSStefan Haberland 843b206181dSStefan Haberland create_uid(private); 844b206181dSStefan Haberland dasd_eckd_get_uid(device, &device_uid); 845b206181dSStefan Haberland 846b206181dSStefan Haberland return memcmp(&device_uid, &private->uid, sizeof(struct dasd_uid)); 847b206181dSStefan Haberland } 848b206181dSStefan Haberland 849a4d26c6aSStefan Weinhuber static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device, 850a4d26c6aSStefan Weinhuber struct dasd_ccw_req *cqr, 851a4d26c6aSStefan Weinhuber __u8 *rcd_buffer, 852a4d26c6aSStefan Weinhuber __u8 lpm) 85317283b56SCornelia Huck { 85417283b56SCornelia Huck struct ccw1 *ccw; 855a4d26c6aSStefan Weinhuber /* 856a4d26c6aSStefan Weinhuber * buffer has to start with EBCDIC "V1.0" to show 857a4d26c6aSStefan Weinhuber * support for virtual device SNEQ 858a4d26c6aSStefan Weinhuber */ 859a4d26c6aSStefan Weinhuber rcd_buffer[0] = 0xE5; 860a4d26c6aSStefan Weinhuber rcd_buffer[1] = 0xF1; 861a4d26c6aSStefan Weinhuber rcd_buffer[2] = 0x4B; 862a4d26c6aSStefan Weinhuber rcd_buffer[3] = 0xF0; 86317283b56SCornelia Huck 86417283b56SCornelia Huck ccw = cqr->cpaddr; 865a4d26c6aSStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RCD; 866a4d26c6aSStefan Weinhuber ccw->flags = 0; 86717283b56SCornelia Huck ccw->cda = (__u32)(addr_t)rcd_buffer; 868a4d26c6aSStefan Weinhuber ccw->count = DASD_ECKD_RCD_DATA_SIZE; 869a4d26c6aSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 87017283b56SCornelia Huck 8718e09f215SStefan Weinhuber cqr->startdev = device; 8728e09f215SStefan Weinhuber cqr->memdev = device; 8738e09f215SStefan Weinhuber cqr->block = NULL; 87417283b56SCornelia Huck cqr->expires = 10*HZ; 87517283b56SCornelia Huck cqr->lpm = lpm; 876eb6e199bSStefan Weinhuber cqr->retries = 256; 8771aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 87817283b56SCornelia Huck cqr->status = DASD_CQR_FILLED; 879a4d26c6aSStefan Weinhuber set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 880a4d26c6aSStefan Weinhuber } 881a4d26c6aSStefan Weinhuber 8825915a873SStefan Haberland /* 8835915a873SStefan Haberland * Wakeup helper for read_conf 8845915a873SStefan Haberland * if the cqr is not done and needs some error recovery 8855915a873SStefan Haberland * the buffer has to be re-initialized with the EBCDIC "V1.0" 8865915a873SStefan Haberland * to show support for virtual device SNEQ 8875915a873SStefan Haberland */ 8885915a873SStefan Haberland static void read_conf_cb(struct dasd_ccw_req *cqr, void *data) 8895915a873SStefan Haberland { 8905915a873SStefan Haberland struct ccw1 *ccw; 8915915a873SStefan Haberland __u8 *rcd_buffer; 8925915a873SStefan Haberland 8935915a873SStefan Haberland if (cqr->status != DASD_CQR_DONE) { 8945915a873SStefan Haberland ccw = cqr->cpaddr; 8955915a873SStefan Haberland rcd_buffer = (__u8 *)((addr_t) ccw->cda); 8965915a873SStefan Haberland memset(rcd_buffer, 0, sizeof(*rcd_buffer)); 8975915a873SStefan Haberland 8985915a873SStefan Haberland rcd_buffer[0] = 0xE5; 8995915a873SStefan Haberland rcd_buffer[1] = 0xF1; 9005915a873SStefan Haberland rcd_buffer[2] = 0x4B; 9015915a873SStefan Haberland rcd_buffer[3] = 0xF0; 9025915a873SStefan Haberland } 9035915a873SStefan Haberland dasd_wakeup_cb(cqr, data); 9045915a873SStefan Haberland } 9055915a873SStefan Haberland 906a4d26c6aSStefan Weinhuber static int dasd_eckd_read_conf_immediately(struct dasd_device *device, 907a4d26c6aSStefan Weinhuber struct dasd_ccw_req *cqr, 908a4d26c6aSStefan Weinhuber __u8 *rcd_buffer, 909a4d26c6aSStefan Weinhuber __u8 lpm) 910a4d26c6aSStefan Weinhuber { 911a4d26c6aSStefan Weinhuber struct ciw *ciw; 912a4d26c6aSStefan Weinhuber int rc; 913a4d26c6aSStefan Weinhuber /* 914a4d26c6aSStefan Weinhuber * sanity check: scan for RCD command in extended SenseID data 915a4d26c6aSStefan Weinhuber * some devices do not support RCD 916a4d26c6aSStefan Weinhuber */ 917a4d26c6aSStefan Weinhuber ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 918a4d26c6aSStefan Weinhuber if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) 919a4d26c6aSStefan Weinhuber return -EOPNOTSUPP; 920a4d26c6aSStefan Weinhuber 921a4d26c6aSStefan Weinhuber dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm); 922a4d26c6aSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 9235a27e60dSStefan Weinhuber set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 924a4d26c6aSStefan Weinhuber cqr->retries = 5; 9255915a873SStefan Haberland cqr->callback = read_conf_cb; 926a4d26c6aSStefan Weinhuber rc = dasd_sleep_on_immediatly(cqr); 927a4d26c6aSStefan Weinhuber return rc; 92817283b56SCornelia Huck } 92917283b56SCornelia Huck 93017283b56SCornelia Huck static int dasd_eckd_read_conf_lpm(struct dasd_device *device, 93117283b56SCornelia Huck void **rcd_buffer, 93217283b56SCornelia Huck int *rcd_buffer_size, __u8 lpm) 93317283b56SCornelia Huck { 93417283b56SCornelia Huck struct ciw *ciw; 93517283b56SCornelia Huck char *rcd_buf = NULL; 93617283b56SCornelia Huck int ret; 93717283b56SCornelia Huck struct dasd_ccw_req *cqr; 93817283b56SCornelia Huck 93917283b56SCornelia Huck /* 940a4d26c6aSStefan Weinhuber * sanity check: scan for RCD command in extended SenseID data 941a4d26c6aSStefan Weinhuber * some devices do not support RCD 94217283b56SCornelia Huck */ 94317283b56SCornelia Huck ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 944a4d26c6aSStefan Weinhuber if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) { 94517283b56SCornelia Huck ret = -EOPNOTSUPP; 94617283b56SCornelia Huck goto out_error; 94717283b56SCornelia Huck } 948a4d26c6aSStefan Weinhuber rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA); 94917283b56SCornelia Huck if (!rcd_buf) { 95017283b56SCornelia Huck ret = -ENOMEM; 95117283b56SCornelia Huck goto out_error; 95217283b56SCornelia Huck } 953a4d26c6aSStefan Weinhuber cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, 954a4d26c6aSStefan Weinhuber 0, /* use rcd_buf as data ara */ 955a4d26c6aSStefan Weinhuber device); 95617283b56SCornelia Huck if (IS_ERR(cqr)) { 957a4d26c6aSStefan Weinhuber DBF_DEV_EVENT(DBF_WARNING, device, "%s", 958a4d26c6aSStefan Weinhuber "Could not allocate RCD request"); 959a4d26c6aSStefan Weinhuber ret = -ENOMEM; 96017283b56SCornelia Huck goto out_error; 96117283b56SCornelia Huck } 962a4d26c6aSStefan Weinhuber dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm); 9635915a873SStefan Haberland cqr->callback = read_conf_cb; 96417283b56SCornelia Huck ret = dasd_sleep_on(cqr); 96517283b56SCornelia Huck /* 96617283b56SCornelia Huck * on success we update the user input parms 96717283b56SCornelia Huck */ 9688e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 96917283b56SCornelia Huck if (ret) 97017283b56SCornelia Huck goto out_error; 97117283b56SCornelia Huck 972a4d26c6aSStefan Weinhuber *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE; 97317283b56SCornelia Huck *rcd_buffer = rcd_buf; 97417283b56SCornelia Huck return 0; 97517283b56SCornelia Huck out_error: 97617283b56SCornelia Huck kfree(rcd_buf); 97717283b56SCornelia Huck *rcd_buffer = NULL; 97817283b56SCornelia Huck *rcd_buffer_size = 0; 97917283b56SCornelia Huck return ret; 98017283b56SCornelia Huck } 98117283b56SCornelia Huck 9824abb08c2SStefan Weinhuber static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private) 9834abb08c2SStefan Weinhuber { 9844abb08c2SStefan Weinhuber 9854abb08c2SStefan Weinhuber struct dasd_sneq *sneq; 9864abb08c2SStefan Weinhuber int i, count; 9874abb08c2SStefan Weinhuber 9884abb08c2SStefan Weinhuber private->ned = NULL; 9894abb08c2SStefan Weinhuber private->sneq = NULL; 9904abb08c2SStefan Weinhuber private->vdsneq = NULL; 9914abb08c2SStefan Weinhuber private->gneq = NULL; 9924abb08c2SStefan Weinhuber count = private->conf_len / sizeof(struct dasd_sneq); 9934abb08c2SStefan Weinhuber sneq = (struct dasd_sneq *)private->conf_data; 9944abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 9954abb08c2SStefan Weinhuber if (sneq->flags.identifier == 1 && sneq->format == 1) 9964abb08c2SStefan Weinhuber private->sneq = sneq; 9974abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 1 && sneq->format == 4) 9984abb08c2SStefan Weinhuber private->vdsneq = (struct vd_sneq *)sneq; 9994abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 2) 10004abb08c2SStefan Weinhuber private->gneq = (struct dasd_gneq *)sneq; 10014abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 3 && sneq->res1 == 1) 10024abb08c2SStefan Weinhuber private->ned = (struct dasd_ned *)sneq; 10034abb08c2SStefan Weinhuber sneq++; 10044abb08c2SStefan Weinhuber } 10054abb08c2SStefan Weinhuber if (!private->ned || !private->gneq) { 10064abb08c2SStefan Weinhuber private->ned = NULL; 10074abb08c2SStefan Weinhuber private->sneq = NULL; 10084abb08c2SStefan Weinhuber private->vdsneq = NULL; 10094abb08c2SStefan Weinhuber private->gneq = NULL; 10104abb08c2SStefan Weinhuber return -EINVAL; 10114abb08c2SStefan Weinhuber } 10124abb08c2SStefan Weinhuber return 0; 10134abb08c2SStefan Weinhuber 10144abb08c2SStefan Weinhuber }; 10154abb08c2SStefan Weinhuber 10164abb08c2SStefan Weinhuber static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len) 10174abb08c2SStefan Weinhuber { 10184abb08c2SStefan Weinhuber struct dasd_gneq *gneq; 10194abb08c2SStefan Weinhuber int i, count, found; 10204abb08c2SStefan Weinhuber 10214abb08c2SStefan Weinhuber count = conf_len / sizeof(*gneq); 10224abb08c2SStefan Weinhuber gneq = (struct dasd_gneq *)conf_data; 10234abb08c2SStefan Weinhuber found = 0; 10244abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 10254abb08c2SStefan Weinhuber if (gneq->flags.identifier == 2) { 10264abb08c2SStefan Weinhuber found = 1; 10274abb08c2SStefan Weinhuber break; 10284abb08c2SStefan Weinhuber } 10294abb08c2SStefan Weinhuber gneq++; 10304abb08c2SStefan Weinhuber } 10314abb08c2SStefan Weinhuber if (found) 10324abb08c2SStefan Weinhuber return ((char *)gneq)[18] & 0x07; 10334abb08c2SStefan Weinhuber else 10344abb08c2SStefan Weinhuber return 0; 10354abb08c2SStefan Weinhuber } 10364abb08c2SStefan Weinhuber 1037c7c0c9deSStefan Haberland static void dasd_eckd_clear_conf_data(struct dasd_device *device) 1038c7c0c9deSStefan Haberland { 1039543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1040c7c0c9deSStefan Haberland int i; 1041c7c0c9deSStefan Haberland 1042c7c0c9deSStefan Haberland private->conf_data = NULL; 1043c7c0c9deSStefan Haberland private->conf_len = 0; 1044c7c0c9deSStefan Haberland for (i = 0; i < 8; i++) { 1045c9346151SStefan Haberland kfree(device->path[i].conf_data); 1046c9346151SStefan Haberland device->path[i].conf_data = NULL; 1047a521b048SStefan Haberland device->path[i].cssid = 0; 1048a521b048SStefan Haberland device->path[i].ssid = 0; 1049a521b048SStefan Haberland device->path[i].chpid = 0; 1050c7c0c9deSStefan Haberland } 1051c7c0c9deSStefan Haberland } 1052c7c0c9deSStefan Haberland 1053c7c0c9deSStefan Haberland 10544abb08c2SStefan Weinhuber static int dasd_eckd_read_conf(struct dasd_device *device) 10551da177e4SLinus Torvalds { 10561da177e4SLinus Torvalds void *conf_data; 10571da177e4SLinus Torvalds int conf_len, conf_data_saved; 1058b179b037SStefan Haberland int rc, path_err, pos; 1059a4d26c6aSStefan Weinhuber __u8 lpm, opm; 1060b206181dSStefan Haberland struct dasd_eckd_private *private, path_private; 1061b206181dSStefan Haberland struct dasd_uid *uid; 1062b206181dSStefan Haberland char print_path_uid[60], print_device_uid[60]; 1063a521b048SStefan Haberland struct channel_path_desc *chp_desc; 1064a521b048SStefan Haberland struct subchannel_id sch_id; 10651da177e4SLinus Torvalds 1066543691a4SSebastian Ott private = device->private; 1067a4d26c6aSStefan Weinhuber opm = ccw_device_get_path_mask(device->cdev); 1068a521b048SStefan Haberland ccw_device_get_schid(device->cdev, &sch_id); 10691da177e4SLinus Torvalds conf_data_saved = 0; 107055d3a85cSStefan Haberland path_err = 0; 10711da177e4SLinus Torvalds /* get configuration data per operational path */ 10721da177e4SLinus Torvalds for (lpm = 0x80; lpm; lpm>>= 1) { 1073b206181dSStefan Haberland if (!(lpm & opm)) 1074b206181dSStefan Haberland continue; 107517283b56SCornelia Huck rc = dasd_eckd_read_conf_lpm(device, &conf_data, 10761da177e4SLinus Torvalds &conf_len, lpm); 10771da177e4SLinus Torvalds if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ 1078b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 10791da177e4SLinus Torvalds "Read configuration data returned " 1080b8ed5dd5SStefan Haberland "error %d", rc); 10811da177e4SLinus Torvalds return rc; 10821da177e4SLinus Torvalds } 10831da177e4SLinus Torvalds if (conf_data == NULL) { 1084b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1085b8ed5dd5SStefan Haberland "No configuration data " 1086b8ed5dd5SStefan Haberland "retrieved"); 1087a4d26c6aSStefan Weinhuber /* no further analysis possible */ 1088c9346151SStefan Haberland dasd_path_add_opm(device, opm); 1089d133a960SGabriel Craciunescu continue; /* no error */ 10901da177e4SLinus Torvalds } 10911da177e4SLinus Torvalds /* save first valid configuration data */ 10921da177e4SLinus Torvalds if (!conf_data_saved) { 1093c7c0c9deSStefan Haberland /* initially clear previously stored conf_data */ 1094c7c0c9deSStefan Haberland dasd_eckd_clear_conf_data(device); 10954abb08c2SStefan Weinhuber private->conf_data = conf_data; 10964abb08c2SStefan Weinhuber private->conf_len = conf_len; 10974abb08c2SStefan Weinhuber if (dasd_eckd_identify_conf_parts(private)) { 10984abb08c2SStefan Weinhuber private->conf_data = NULL; 10994abb08c2SStefan Weinhuber private->conf_len = 0; 11004abb08c2SStefan Weinhuber kfree(conf_data); 11014abb08c2SStefan Weinhuber continue; 11024abb08c2SStefan Weinhuber } 1103c7c0c9deSStefan Haberland pos = pathmask_to_pos(lpm); 1104c7c0c9deSStefan Haberland /* store per path conf_data */ 1105c9346151SStefan Haberland device->path[pos].conf_data = conf_data; 1106a521b048SStefan Haberland device->path[pos].cssid = sch_id.cssid; 1107a521b048SStefan Haberland device->path[pos].ssid = sch_id.ssid; 1108a521b048SStefan Haberland chp_desc = ccw_device_get_chp_desc(device->cdev, pos); 1109a521b048SStefan Haberland if (chp_desc) 1110a521b048SStefan Haberland device->path[pos].chpid = chp_desc->chpid; 1111a521b048SStefan Haberland kfree(chp_desc); 1112b206181dSStefan Haberland /* 1113b206181dSStefan Haberland * build device UID that other path data 1114b206181dSStefan Haberland * can be compared to it 1115b206181dSStefan Haberland */ 1116b206181dSStefan Haberland dasd_eckd_generate_uid(device); 11171da177e4SLinus Torvalds conf_data_saved++; 1118b206181dSStefan Haberland } else { 1119b206181dSStefan Haberland path_private.conf_data = conf_data; 1120b206181dSStefan Haberland path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1121b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts( 1122b206181dSStefan Haberland &path_private)) { 1123b206181dSStefan Haberland path_private.conf_data = NULL; 1124b206181dSStefan Haberland path_private.conf_len = 0; 1125b206181dSStefan Haberland kfree(conf_data); 1126b206181dSStefan Haberland continue; 1127b206181dSStefan Haberland } 1128b206181dSStefan Haberland if (dasd_eckd_compare_path_uid( 1129b206181dSStefan Haberland device, &path_private)) { 1130b206181dSStefan Haberland uid = &path_private.uid; 1131b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1132b206181dSStefan Haberland snprintf(print_path_uid, 1133b206181dSStefan Haberland sizeof(print_path_uid), 1134b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1135b206181dSStefan Haberland uid->vendor, uid->serial, 1136b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1137b206181dSStefan Haberland uid->vduit); 1138b206181dSStefan Haberland else 1139b206181dSStefan Haberland snprintf(print_path_uid, 1140b206181dSStefan Haberland sizeof(print_path_uid), 1141b206181dSStefan Haberland "%s.%s.%04x.%02x", 1142b206181dSStefan Haberland uid->vendor, uid->serial, 1143b206181dSStefan Haberland uid->ssid, 1144b206181dSStefan Haberland uid->real_unit_addr); 1145b206181dSStefan Haberland uid = &private->uid; 1146b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1147b206181dSStefan Haberland snprintf(print_device_uid, 1148b206181dSStefan Haberland sizeof(print_device_uid), 1149b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1150b206181dSStefan Haberland uid->vendor, uid->serial, 1151b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1152b206181dSStefan Haberland uid->vduit); 1153b206181dSStefan Haberland else 1154b206181dSStefan Haberland snprintf(print_device_uid, 1155b206181dSStefan Haberland sizeof(print_device_uid), 1156b206181dSStefan Haberland "%s.%s.%04x.%02x", 1157b206181dSStefan Haberland uid->vendor, uid->serial, 1158b206181dSStefan Haberland uid->ssid, 1159b206181dSStefan Haberland uid->real_unit_addr); 1160b206181dSStefan Haberland dev_err(&device->cdev->dev, 1161b206181dSStefan Haberland "Not all channel paths lead to " 1162b206181dSStefan Haberland "the same device, path %02X leads to " 1163b206181dSStefan Haberland "device %s instead of %s\n", lpm, 1164b206181dSStefan Haberland print_path_uid, print_device_uid); 116555d3a85cSStefan Haberland path_err = -EINVAL; 1166c9346151SStefan Haberland dasd_path_add_cablepm(device, lpm); 116755d3a85cSStefan Haberland continue; 1168b206181dSStefan Haberland } 1169c7c0c9deSStefan Haberland pos = pathmask_to_pos(lpm); 1170c7c0c9deSStefan Haberland /* store per path conf_data */ 1171c9346151SStefan Haberland device->path[pos].conf_data = conf_data; 1172a521b048SStefan Haberland device->path[pos].cssid = sch_id.cssid; 1173a521b048SStefan Haberland device->path[pos].ssid = sch_id.ssid; 1174a521b048SStefan Haberland chp_desc = ccw_device_get_chp_desc(device->cdev, pos); 1175a521b048SStefan Haberland if (chp_desc) 1176a521b048SStefan Haberland device->path[pos].chpid = chp_desc->chpid; 1177a521b048SStefan Haberland kfree(chp_desc); 1178b206181dSStefan Haberland path_private.conf_data = NULL; 1179b206181dSStefan Haberland path_private.conf_len = 0; 11801da177e4SLinus Torvalds } 11814abb08c2SStefan Weinhuber switch (dasd_eckd_path_access(conf_data, conf_len)) { 11821da177e4SLinus Torvalds case 0x02: 1183c9346151SStefan Haberland dasd_path_add_nppm(device, lpm); 11841da177e4SLinus Torvalds break; 11851da177e4SLinus Torvalds case 0x03: 1186c9346151SStefan Haberland dasd_path_add_ppm(device, lpm); 11871da177e4SLinus Torvalds break; 11881da177e4SLinus Torvalds } 1189c9346151SStefan Haberland if (!dasd_path_get_opm(device)) { 1190c9346151SStefan Haberland dasd_path_set_opm(device, lpm); 1191ccc0e7dcSStefan Haberland dasd_generic_path_operational(device); 1192ccc0e7dcSStefan Haberland } else { 1193c9346151SStefan Haberland dasd_path_add_opm(device, lpm); 1194ccc0e7dcSStefan Haberland } 11951da177e4SLinus Torvalds } 1196b206181dSStefan Haberland 119755d3a85cSStefan Haberland return path_err; 11981da177e4SLinus Torvalds } 11991da177e4SLinus Torvalds 1200a521b048SStefan Haberland static u32 get_fcx_max_data(struct dasd_device *device) 1201a521b048SStefan Haberland { 1202a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 1203a521b048SStefan Haberland int fcx_in_css, fcx_in_gneq, fcx_in_features; 1204a521b048SStefan Haberland int tpm, mdc; 1205a521b048SStefan Haberland 1206a521b048SStefan Haberland if (dasd_nofcx) 1207a521b048SStefan Haberland return 0; 1208a521b048SStefan Haberland /* is transport mode supported? */ 1209a521b048SStefan Haberland fcx_in_css = css_general_characteristics.fcx; 1210a521b048SStefan Haberland fcx_in_gneq = private->gneq->reserved2[7] & 0x04; 1211a521b048SStefan Haberland fcx_in_features = private->features.feature[40] & 0x80; 1212a521b048SStefan Haberland tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; 1213a521b048SStefan Haberland 1214a521b048SStefan Haberland if (!tpm) 1215a521b048SStefan Haberland return 0; 1216a521b048SStefan Haberland 1217a521b048SStefan Haberland mdc = ccw_device_get_mdc(device->cdev, 0); 1218a521b048SStefan Haberland if (mdc < 0) { 1219a521b048SStefan Haberland dev_warn(&device->cdev->dev, "Detecting the maximum supported data size for zHPF requests failed\n"); 1220a521b048SStefan Haberland return 0; 1221a521b048SStefan Haberland } else { 1222a521b048SStefan Haberland return (u32)mdc * FCX_MAX_DATA_FACTOR; 1223a521b048SStefan Haberland } 1224a521b048SStefan Haberland } 1225a521b048SStefan Haberland 1226a4d26c6aSStefan Weinhuber static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm) 1227a4d26c6aSStefan Weinhuber { 1228543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1229a4d26c6aSStefan Weinhuber int mdc; 1230a4d26c6aSStefan Weinhuber u32 fcx_max_data; 1231a4d26c6aSStefan Weinhuber 1232a4d26c6aSStefan Weinhuber if (private->fcx_max_data) { 1233a4d26c6aSStefan Weinhuber mdc = ccw_device_get_mdc(device->cdev, lpm); 1234a4d26c6aSStefan Weinhuber if ((mdc < 0)) { 1235a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1236a4d26c6aSStefan Weinhuber "Detecting the maximum data size for zHPF " 1237a4d26c6aSStefan Weinhuber "requests failed (rc=%d) for a new path %x\n", 1238a4d26c6aSStefan Weinhuber mdc, lpm); 1239a4d26c6aSStefan Weinhuber return mdc; 1240a4d26c6aSStefan Weinhuber } 12410f02c4e7SChristian Borntraeger fcx_max_data = (u32)mdc * FCX_MAX_DATA_FACTOR; 1242a4d26c6aSStefan Weinhuber if (fcx_max_data < private->fcx_max_data) { 1243a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1244a4d26c6aSStefan Weinhuber "The maximum data size for zHPF requests %u " 1245a4d26c6aSStefan Weinhuber "on a new path %x is below the active maximum " 1246a4d26c6aSStefan Weinhuber "%u\n", fcx_max_data, lpm, 1247a4d26c6aSStefan Weinhuber private->fcx_max_data); 1248a4d26c6aSStefan Weinhuber return -EACCES; 1249a4d26c6aSStefan Weinhuber } 1250a4d26c6aSStefan Weinhuber } 1251a4d26c6aSStefan Weinhuber return 0; 1252a4d26c6aSStefan Weinhuber } 1253a4d26c6aSStefan Weinhuber 1254b206181dSStefan Haberland static int rebuild_device_uid(struct dasd_device *device, 1255b206181dSStefan Haberland struct path_verification_work_data *data) 1256b206181dSStefan Haberland { 1257543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1258c9346151SStefan Haberland __u8 lpm, opm = dasd_path_get_opm(device); 1259543691a4SSebastian Ott int rc = -ENODEV; 1260b206181dSStefan Haberland 1261b206181dSStefan Haberland for (lpm = 0x80; lpm; lpm >>= 1) { 1262b206181dSStefan Haberland if (!(lpm & opm)) 1263b206181dSStefan Haberland continue; 1264b206181dSStefan Haberland memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1265b206181dSStefan Haberland memset(&data->cqr, 0, sizeof(data->cqr)); 1266b206181dSStefan Haberland data->cqr.cpaddr = &data->ccw; 1267b206181dSStefan Haberland rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1268b206181dSStefan Haberland data->rcd_buffer, 1269b206181dSStefan Haberland lpm); 1270b206181dSStefan Haberland 1271b206181dSStefan Haberland if (rc) { 1272b206181dSStefan Haberland if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */ 1273b206181dSStefan Haberland continue; 1274b206181dSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1275b206181dSStefan Haberland "Read configuration data " 1276b206181dSStefan Haberland "returned error %d", rc); 1277b206181dSStefan Haberland break; 1278b206181dSStefan Haberland } 1279b206181dSStefan Haberland memcpy(private->conf_data, data->rcd_buffer, 1280b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE); 1281b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts(private)) { 1282b206181dSStefan Haberland rc = -ENODEV; 1283b206181dSStefan Haberland } else /* first valid path is enough */ 1284b206181dSStefan Haberland break; 1285b206181dSStefan Haberland } 1286b206181dSStefan Haberland 1287b206181dSStefan Haberland if (!rc) 1288b206181dSStefan Haberland rc = dasd_eckd_generate_uid(device); 1289b206181dSStefan Haberland 1290b206181dSStefan Haberland return rc; 1291b206181dSStefan Haberland } 1292b206181dSStefan Haberland 1293a4d26c6aSStefan Weinhuber static void do_path_verification_work(struct work_struct *work) 1294a4d26c6aSStefan Weinhuber { 1295a4d26c6aSStefan Weinhuber struct path_verification_work_data *data; 1296a4d26c6aSStefan Weinhuber struct dasd_device *device; 1297b206181dSStefan Haberland struct dasd_eckd_private path_private; 1298b206181dSStefan Haberland struct dasd_uid *uid; 1299b206181dSStefan Haberland __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE]; 13005db8440cSStefan Haberland __u8 lpm, opm, npm, ppm, epm, hpfpm, cablepm; 1301a4d26c6aSStefan Weinhuber unsigned long flags; 1302b206181dSStefan Haberland char print_uid[60]; 1303a4d26c6aSStefan Weinhuber int rc; 1304a4d26c6aSStefan Weinhuber 1305a4d26c6aSStefan Weinhuber data = container_of(work, struct path_verification_work_data, worker); 1306a4d26c6aSStefan Weinhuber device = data->device; 1307a4d26c6aSStefan Weinhuber 1308c8d1c0ffSStefan Haberland /* delay path verification until device was resumed */ 1309c8d1c0ffSStefan Haberland if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 1310c8d1c0ffSStefan Haberland schedule_work(work); 1311c8d1c0ffSStefan Haberland return; 1312c8d1c0ffSStefan Haberland } 13131eb38023SStefan Haberland /* check if path verification already running and delay if so */ 13141eb38023SStefan Haberland if (test_and_set_bit(DASD_FLAG_PATH_VERIFY, &device->flags)) { 13151eb38023SStefan Haberland schedule_work(work); 13161eb38023SStefan Haberland return; 13171eb38023SStefan Haberland } 1318a4d26c6aSStefan Weinhuber opm = 0; 1319a4d26c6aSStefan Weinhuber npm = 0; 1320a4d26c6aSStefan Weinhuber ppm = 0; 1321a4d26c6aSStefan Weinhuber epm = 0; 13225db8440cSStefan Haberland hpfpm = 0; 13235db8440cSStefan Haberland cablepm = 0; 13245db8440cSStefan Haberland 1325a4d26c6aSStefan Weinhuber for (lpm = 0x80; lpm; lpm >>= 1) { 1326b206181dSStefan Haberland if (!(lpm & data->tbvpm)) 1327b206181dSStefan Haberland continue; 1328b206181dSStefan Haberland memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1329a4d26c6aSStefan Weinhuber memset(&data->cqr, 0, sizeof(data->cqr)); 1330a4d26c6aSStefan Weinhuber data->cqr.cpaddr = &data->ccw; 1331a4d26c6aSStefan Weinhuber rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1332a4d26c6aSStefan Weinhuber data->rcd_buffer, 1333a4d26c6aSStefan Weinhuber lpm); 1334a4d26c6aSStefan Weinhuber if (!rc) { 1335a4d26c6aSStefan Weinhuber switch (dasd_eckd_path_access(data->rcd_buffer, 1336b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE) 1337b206181dSStefan Haberland ) { 1338a4d26c6aSStefan Weinhuber case 0x02: 1339a4d26c6aSStefan Weinhuber npm |= lpm; 1340a4d26c6aSStefan Weinhuber break; 1341a4d26c6aSStefan Weinhuber case 0x03: 1342a4d26c6aSStefan Weinhuber ppm |= lpm; 1343a4d26c6aSStefan Weinhuber break; 1344a4d26c6aSStefan Weinhuber } 1345a4d26c6aSStefan Weinhuber opm |= lpm; 1346a4d26c6aSStefan Weinhuber } else if (rc == -EOPNOTSUPP) { 1347a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1348a4d26c6aSStefan Weinhuber "path verification: No configuration " 1349a4d26c6aSStefan Weinhuber "data retrieved"); 1350a4d26c6aSStefan Weinhuber opm |= lpm; 1351a4d26c6aSStefan Weinhuber } else if (rc == -EAGAIN) { 1352a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1353a4d26c6aSStefan Weinhuber "path verification: device is stopped," 1354a4d26c6aSStefan Weinhuber " try again later"); 1355a4d26c6aSStefan Weinhuber epm |= lpm; 1356a4d26c6aSStefan Weinhuber } else { 1357a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1358a4d26c6aSStefan Weinhuber "Reading device feature codes failed " 1359a4d26c6aSStefan Weinhuber "(rc=%d) for new path %x\n", rc, lpm); 1360a4d26c6aSStefan Weinhuber continue; 1361a4d26c6aSStefan Weinhuber } 1362a4d26c6aSStefan Weinhuber if (verify_fcx_max_data(device, lpm)) { 1363a4d26c6aSStefan Weinhuber opm &= ~lpm; 1364a4d26c6aSStefan Weinhuber npm &= ~lpm; 1365a4d26c6aSStefan Weinhuber ppm &= ~lpm; 13665db8440cSStefan Haberland hpfpm |= lpm; 1367b206181dSStefan Haberland continue; 1368b206181dSStefan Haberland } 1369b206181dSStefan Haberland 1370b206181dSStefan Haberland /* 1371b206181dSStefan Haberland * save conf_data for comparison after 1372b206181dSStefan Haberland * rebuild_device_uid may have changed 1373b206181dSStefan Haberland * the original data 1374b206181dSStefan Haberland */ 1375b206181dSStefan Haberland memcpy(&path_rcd_buf, data->rcd_buffer, 1376b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE); 1377b206181dSStefan Haberland path_private.conf_data = (void *) &path_rcd_buf; 1378b206181dSStefan Haberland path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1379b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts(&path_private)) { 1380b206181dSStefan Haberland path_private.conf_data = NULL; 1381b206181dSStefan Haberland path_private.conf_len = 0; 1382b206181dSStefan Haberland continue; 1383b206181dSStefan Haberland } 1384b206181dSStefan Haberland 1385b206181dSStefan Haberland /* 1386b206181dSStefan Haberland * compare path UID with device UID only if at least 1387b206181dSStefan Haberland * one valid path is left 1388b206181dSStefan Haberland * in other case the device UID may have changed and 1389b206181dSStefan Haberland * the first working path UID will be used as device UID 1390b206181dSStefan Haberland */ 1391c9346151SStefan Haberland if (dasd_path_get_opm(device) && 1392b206181dSStefan Haberland dasd_eckd_compare_path_uid(device, &path_private)) { 1393b206181dSStefan Haberland /* 1394b206181dSStefan Haberland * the comparison was not successful 1395b206181dSStefan Haberland * rebuild the device UID with at least one 1396b206181dSStefan Haberland * known path in case a z/VM hyperswap command 1397b206181dSStefan Haberland * has changed the device 1398b206181dSStefan Haberland * 1399b206181dSStefan Haberland * after this compare again 1400b206181dSStefan Haberland * 1401b206181dSStefan Haberland * if either the rebuild or the recompare fails 1402b206181dSStefan Haberland * the path can not be used 1403b206181dSStefan Haberland */ 1404b206181dSStefan Haberland if (rebuild_device_uid(device, data) || 1405b206181dSStefan Haberland dasd_eckd_compare_path_uid( 1406b206181dSStefan Haberland device, &path_private)) { 1407b206181dSStefan Haberland uid = &path_private.uid; 1408b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1409b206181dSStefan Haberland snprintf(print_uid, sizeof(print_uid), 1410b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1411b206181dSStefan Haberland uid->vendor, uid->serial, 1412b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1413b206181dSStefan Haberland uid->vduit); 1414b206181dSStefan Haberland else 1415b206181dSStefan Haberland snprintf(print_uid, sizeof(print_uid), 1416b206181dSStefan Haberland "%s.%s.%04x.%02x", 1417b206181dSStefan Haberland uid->vendor, uid->serial, 1418b206181dSStefan Haberland uid->ssid, 1419b206181dSStefan Haberland uid->real_unit_addr); 1420b206181dSStefan Haberland dev_err(&device->cdev->dev, 1421b206181dSStefan Haberland "The newly added channel path %02X " 1422b206181dSStefan Haberland "will not be used because it leads " 1423b206181dSStefan Haberland "to a different device %s\n", 1424b206181dSStefan Haberland lpm, print_uid); 1425b206181dSStefan Haberland opm &= ~lpm; 1426b206181dSStefan Haberland npm &= ~lpm; 1427b206181dSStefan Haberland ppm &= ~lpm; 14285db8440cSStefan Haberland cablepm |= lpm; 1429b206181dSStefan Haberland continue; 1430a4d26c6aSStefan Weinhuber } 1431a4d26c6aSStefan Weinhuber } 1432b206181dSStefan Haberland 1433a4d26c6aSStefan Weinhuber /* 1434a4d26c6aSStefan Weinhuber * There is a small chance that a path is lost again between 1435a4d26c6aSStefan Weinhuber * above path verification and the following modification of 1436a4d26c6aSStefan Weinhuber * the device opm mask. We could avoid that race here by using 1437a4d26c6aSStefan Weinhuber * yet another path mask, but we rather deal with this unlikely 1438a4d26c6aSStefan Weinhuber * situation in dasd_start_IO. 1439a4d26c6aSStefan Weinhuber */ 1440a4d26c6aSStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1441c9346151SStefan Haberland if (!dasd_path_get_opm(device) && opm) { 1442c9346151SStefan Haberland dasd_path_set_opm(device, opm); 1443a4d26c6aSStefan Weinhuber dasd_generic_path_operational(device); 14445db8440cSStefan Haberland } else { 1445c9346151SStefan Haberland dasd_path_add_opm(device, opm); 14465db8440cSStefan Haberland } 1447c9346151SStefan Haberland dasd_path_add_nppm(device, npm); 1448c9346151SStefan Haberland dasd_path_add_ppm(device, ppm); 1449c9346151SStefan Haberland dasd_path_add_tbvpm(device, epm); 1450c9346151SStefan Haberland dasd_path_add_cablepm(device, cablepm); 1451c9346151SStefan Haberland dasd_path_add_nohpfpm(device, hpfpm); 1452a4d26c6aSStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1453b206181dSStefan Haberland } 14541eb38023SStefan Haberland clear_bit(DASD_FLAG_PATH_VERIFY, &device->flags); 1455a4d26c6aSStefan Weinhuber dasd_put_device(device); 1456a4d26c6aSStefan Weinhuber if (data->isglobal) 1457a4d26c6aSStefan Weinhuber mutex_unlock(&dasd_path_verification_mutex); 1458a4d26c6aSStefan Weinhuber else 1459a4d26c6aSStefan Weinhuber kfree(data); 1460a4d26c6aSStefan Weinhuber } 1461a4d26c6aSStefan Weinhuber 1462a4d26c6aSStefan Weinhuber static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm) 1463a4d26c6aSStefan Weinhuber { 1464a4d26c6aSStefan Weinhuber struct path_verification_work_data *data; 1465a4d26c6aSStefan Weinhuber 1466a4d26c6aSStefan Weinhuber data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA); 1467a4d26c6aSStefan Weinhuber if (!data) { 1468a4d26c6aSStefan Weinhuber if (mutex_trylock(&dasd_path_verification_mutex)) { 1469a4d26c6aSStefan Weinhuber data = path_verification_worker; 1470a4d26c6aSStefan Weinhuber data->isglobal = 1; 1471a4d26c6aSStefan Weinhuber } else 1472a4d26c6aSStefan Weinhuber return -ENOMEM; 1473a4d26c6aSStefan Weinhuber } else { 1474a4d26c6aSStefan Weinhuber memset(data, 0, sizeof(*data)); 1475a4d26c6aSStefan Weinhuber data->isglobal = 0; 1476a4d26c6aSStefan Weinhuber } 1477a4d26c6aSStefan Weinhuber INIT_WORK(&data->worker, do_path_verification_work); 1478a4d26c6aSStefan Weinhuber dasd_get_device(device); 1479a4d26c6aSStefan Weinhuber data->device = device; 1480a4d26c6aSStefan Weinhuber data->tbvpm = lpm; 1481a4d26c6aSStefan Weinhuber schedule_work(&data->worker); 1482a4d26c6aSStefan Weinhuber return 0; 1483a4d26c6aSStefan Weinhuber } 1484a4d26c6aSStefan Weinhuber 1485a521b048SStefan Haberland static void dasd_eckd_reset_path(struct dasd_device *device, __u8 pm) 1486a521b048SStefan Haberland { 1487a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 1488a521b048SStefan Haberland unsigned long flags; 1489a521b048SStefan Haberland 1490a521b048SStefan Haberland if (!private->fcx_max_data) 1491a521b048SStefan Haberland private->fcx_max_data = get_fcx_max_data(device); 1492a521b048SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1493a521b048SStefan Haberland dasd_path_set_tbvpm(device, pm ? : dasd_path_get_notoperpm(device)); 1494a521b048SStefan Haberland dasd_schedule_device_bh(device); 1495a521b048SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1496a521b048SStefan Haberland } 1497a521b048SStefan Haberland 14988e09f215SStefan Weinhuber static int dasd_eckd_read_features(struct dasd_device *device) 14998e09f215SStefan Weinhuber { 1500543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 15018e09f215SStefan Weinhuber struct dasd_psf_prssd_data *prssdp; 15028e09f215SStefan Weinhuber struct dasd_rssd_features *features; 15038e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 15048e09f215SStefan Weinhuber struct ccw1 *ccw; 15058e09f215SStefan Weinhuber int rc; 15068e09f215SStefan Weinhuber 150768d1e5f0SStefan Weinhuber memset(&private->features, 0, sizeof(struct dasd_rssd_features)); 150868b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 15098e09f215SStefan Weinhuber (sizeof(struct dasd_psf_prssd_data) + 15108e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)), 15118e09f215SStefan Weinhuber device); 15128e09f215SStefan Weinhuber if (IS_ERR(cqr)) { 1513b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " 1514b8ed5dd5SStefan Haberland "allocate initialization request"); 15158e09f215SStefan Weinhuber return PTR_ERR(cqr); 15168e09f215SStefan Weinhuber } 15178e09f215SStefan Weinhuber cqr->startdev = device; 15188e09f215SStefan Weinhuber cqr->memdev = device; 15198e09f215SStefan Weinhuber cqr->block = NULL; 1520eb6e199bSStefan Weinhuber cqr->retries = 256; 15218e09f215SStefan Weinhuber cqr->expires = 10 * HZ; 15228e09f215SStefan Weinhuber 15238e09f215SStefan Weinhuber /* Prepare for Read Subsystem Data */ 15248e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 15258e09f215SStefan Weinhuber memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 15268e09f215SStefan Weinhuber prssdp->order = PSF_ORDER_PRSSD; 15278e09f215SStefan Weinhuber prssdp->suborder = 0x41; /* Read Feature Codes */ 15288e09f215SStefan Weinhuber /* all other bytes of prssdp must be zero */ 15298e09f215SStefan Weinhuber 15308e09f215SStefan Weinhuber ccw = cqr->cpaddr; 15318e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PSF; 15328e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_psf_prssd_data); 15338e09f215SStefan Weinhuber ccw->flags |= CCW_FLAG_CC; 15348e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) prssdp; 15358e09f215SStefan Weinhuber 15368e09f215SStefan Weinhuber /* Read Subsystem Data - feature codes */ 15378e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 15388e09f215SStefan Weinhuber memset(features, 0, sizeof(struct dasd_rssd_features)); 15398e09f215SStefan Weinhuber 15408e09f215SStefan Weinhuber ccw++; 15418e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RSSD; 15428e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_rssd_features); 15438e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) features; 15448e09f215SStefan Weinhuber 15451aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 15468e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 15478e09f215SStefan Weinhuber rc = dasd_sleep_on(cqr); 15488e09f215SStefan Weinhuber if (rc == 0) { 15498e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 15508e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 15518e09f215SStefan Weinhuber memcpy(&private->features, features, 15528e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)); 155368d1e5f0SStefan Weinhuber } else 155468d1e5f0SStefan Weinhuber dev_warn(&device->cdev->dev, "Reading device feature codes" 155568d1e5f0SStefan Weinhuber " failed with rc=%d\n", rc); 15568e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 15578e09f215SStefan Weinhuber return rc; 15588e09f215SStefan Weinhuber } 15598e09f215SStefan Weinhuber 15608e09f215SStefan Weinhuber 15613d052595SHorst Hummel /* 156240545573SHorst Hummel * Build CP for Perform Subsystem Function - SSC. 156340545573SHorst Hummel */ 1564f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, 1565f3eb5384SStefan Weinhuber int enable_pav) 156640545573SHorst Hummel { 156740545573SHorst Hummel struct dasd_ccw_req *cqr; 156840545573SHorst Hummel struct dasd_psf_ssc_data *psf_ssc_data; 156940545573SHorst Hummel struct ccw1 *ccw; 157040545573SHorst Hummel 157168b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 157240545573SHorst Hummel sizeof(struct dasd_psf_ssc_data), 157340545573SHorst Hummel device); 157440545573SHorst Hummel 157540545573SHorst Hummel if (IS_ERR(cqr)) { 1576fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 157740545573SHorst Hummel "Could not allocate PSF-SSC request"); 157840545573SHorst Hummel return cqr; 157940545573SHorst Hummel } 158040545573SHorst Hummel psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 158140545573SHorst Hummel psf_ssc_data->order = PSF_ORDER_SSC; 1582626350b6SStefan Weinhuber psf_ssc_data->suborder = 0xc0; 1583f3eb5384SStefan Weinhuber if (enable_pav) { 1584626350b6SStefan Weinhuber psf_ssc_data->suborder |= 0x08; 15858e09f215SStefan Weinhuber psf_ssc_data->reserved[0] = 0x88; 1586f3eb5384SStefan Weinhuber } 158740545573SHorst Hummel ccw = cqr->cpaddr; 158840545573SHorst Hummel ccw->cmd_code = DASD_ECKD_CCW_PSF; 158940545573SHorst Hummel ccw->cda = (__u32)(addr_t)psf_ssc_data; 159040545573SHorst Hummel ccw->count = 66; 159140545573SHorst Hummel 15928e09f215SStefan Weinhuber cqr->startdev = device; 15938e09f215SStefan Weinhuber cqr->memdev = device; 15948e09f215SStefan Weinhuber cqr->block = NULL; 1595eb6e199bSStefan Weinhuber cqr->retries = 256; 159640545573SHorst Hummel cqr->expires = 10*HZ; 15971aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 159840545573SHorst Hummel cqr->status = DASD_CQR_FILLED; 159940545573SHorst Hummel return cqr; 160040545573SHorst Hummel } 160140545573SHorst Hummel 160240545573SHorst Hummel /* 160340545573SHorst Hummel * Perform Subsystem Function. 160440545573SHorst Hummel * It is necessary to trigger CIO for channel revalidation since this 160540545573SHorst Hummel * call might change behaviour of DASD devices. 160640545573SHorst Hummel */ 160740545573SHorst Hummel static int 160812d7b107SStefan Haberland dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav, 160912d7b107SStefan Haberland unsigned long flags) 161040545573SHorst Hummel { 161140545573SHorst Hummel struct dasd_ccw_req *cqr; 161240545573SHorst Hummel int rc; 161340545573SHorst Hummel 1614f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_psf_ssc(device, enable_pav); 161540545573SHorst Hummel if (IS_ERR(cqr)) 161640545573SHorst Hummel return PTR_ERR(cqr); 161740545573SHorst Hummel 161812d7b107SStefan Haberland /* 161912d7b107SStefan Haberland * set flags e.g. turn on failfast, to prevent blocking 162012d7b107SStefan Haberland * the calling function should handle failed requests 162112d7b107SStefan Haberland */ 162212d7b107SStefan Haberland cqr->flags |= flags; 162312d7b107SStefan Haberland 162440545573SHorst Hummel rc = dasd_sleep_on(cqr); 162540545573SHorst Hummel if (!rc) 162640545573SHorst Hummel /* trigger CIO to reprobe devices */ 162740545573SHorst Hummel css_schedule_reprobe(); 162812d7b107SStefan Haberland else if (cqr->intrc == -EAGAIN) 162912d7b107SStefan Haberland rc = -EAGAIN; 163012d7b107SStefan Haberland 16318e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 163240545573SHorst Hummel return rc; 163340545573SHorst Hummel } 163440545573SHorst Hummel 163540545573SHorst Hummel /* 163640545573SHorst Hummel * Valide storage server of current device. 163740545573SHorst Hummel */ 163812d7b107SStefan Haberland static int dasd_eckd_validate_server(struct dasd_device *device, 163912d7b107SStefan Haberland unsigned long flags) 164040545573SHorst Hummel { 1641543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1642543691a4SSebastian Ott int enable_pav, rc; 164340545573SHorst Hummel 1644f9f8d02fSStefan Haberland if (private->uid.type == UA_BASE_PAV_ALIAS || 1645f9f8d02fSStefan Haberland private->uid.type == UA_HYPER_PAV_ALIAS) 164612d7b107SStefan Haberland return 0; 164740545573SHorst Hummel if (dasd_nopav || MACHINE_IS_VM) 1648f3eb5384SStefan Weinhuber enable_pav = 0; 1649f3eb5384SStefan Weinhuber else 1650f3eb5384SStefan Weinhuber enable_pav = 1; 165112d7b107SStefan Haberland rc = dasd_eckd_psf_ssc(device, enable_pav, flags); 1652eb6e199bSStefan Weinhuber 165340545573SHorst Hummel /* may be requested feature is not available on server, 165440545573SHorst Hummel * therefore just report error and go ahead */ 1655b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " 1656b8ed5dd5SStefan Haberland "returned rc=%d", private->uid.ssid, rc); 165712d7b107SStefan Haberland return rc; 165840545573SHorst Hummel } 165940545573SHorst Hummel 1660f1633031SStefan Haberland /* 1661f1633031SStefan Haberland * worker to do a validate server in case of a lost pathgroup 1662f1633031SStefan Haberland */ 1663f1633031SStefan Haberland static void dasd_eckd_do_validate_server(struct work_struct *work) 1664f1633031SStefan Haberland { 1665f1633031SStefan Haberland struct dasd_device *device = container_of(work, struct dasd_device, 1666f1633031SStefan Haberland kick_validate); 1667ea4da6eaSStefan Haberland unsigned long flags = 0; 1668ea4da6eaSStefan Haberland 1669ea4da6eaSStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &flags); 1670ea4da6eaSStefan Haberland if (dasd_eckd_validate_server(device, flags) 167112d7b107SStefan Haberland == -EAGAIN) { 167212d7b107SStefan Haberland /* schedule worker again if failed */ 167312d7b107SStefan Haberland schedule_work(&device->kick_validate); 167412d7b107SStefan Haberland return; 167512d7b107SStefan Haberland } 167612d7b107SStefan Haberland 1677f1633031SStefan Haberland dasd_put_device(device); 1678f1633031SStefan Haberland } 1679f1633031SStefan Haberland 1680f1633031SStefan Haberland static void dasd_eckd_kick_validate_server(struct dasd_device *device) 1681f1633031SStefan Haberland { 1682f1633031SStefan Haberland dasd_get_device(device); 168325e2cf1cSStefan Haberland /* exit if device not online or in offline processing */ 168425e2cf1cSStefan Haberland if (test_bit(DASD_FLAG_OFFLINE, &device->flags) || 168525e2cf1cSStefan Haberland device->state < DASD_STATE_ONLINE) { 168625e2cf1cSStefan Haberland dasd_put_device(device); 168725e2cf1cSStefan Haberland return; 168825e2cf1cSStefan Haberland } 1689f1633031SStefan Haberland /* queue call to do_validate_server to the kernel event daemon. */ 1690f2608cd4SStefan Haberland if (!schedule_work(&device->kick_validate)) 1691f2608cd4SStefan Haberland dasd_put_device(device); 1692f1633031SStefan Haberland } 1693f1633031SStefan Haberland 169440545573SHorst Hummel /* 16953d052595SHorst Hummel * Check device characteristics. 16963d052595SHorst Hummel * If the device is accessible using ECKD discipline, the device is enabled. 16973d052595SHorst Hummel */ 16981da177e4SLinus Torvalds static int 16991da177e4SLinus Torvalds dasd_eckd_check_characteristics(struct dasd_device *device) 17001da177e4SLinus Torvalds { 1701543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 17028e09f215SStefan Weinhuber struct dasd_block *block; 17032dedf0d9SStefan Haberland struct dasd_uid temp_uid; 1704f9f8d02fSStefan Haberland int rc, i; 170533b62a30SStefan Weinhuber int readonly; 17067c8faa86SStefan Haberland unsigned long value; 17071da177e4SLinus Torvalds 1708f1633031SStefan Haberland /* setup work queue for validate server*/ 1709f1633031SStefan Haberland INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server); 171059a9ed5fSStefan Haberland /* setup work queue for summary unit check */ 171159a9ed5fSStefan Haberland INIT_WORK(&device->suc_work, dasd_alias_handle_summary_unit_check); 1712f1633031SStefan Haberland 1713454e1fa1SPeter Oberparleiter if (!ccw_device_is_pathgroup(device->cdev)) { 1714454e1fa1SPeter Oberparleiter dev_warn(&device->cdev->dev, 1715454e1fa1SPeter Oberparleiter "A channel path group could not be established\n"); 1716454e1fa1SPeter Oberparleiter return -EIO; 1717454e1fa1SPeter Oberparleiter } 1718454e1fa1SPeter Oberparleiter if (!ccw_device_is_multipath(device->cdev)) { 1719454e1fa1SPeter Oberparleiter dev_info(&device->cdev->dev, 1720454e1fa1SPeter Oberparleiter "The DASD is not operating in multipath mode\n"); 1721454e1fa1SPeter Oberparleiter } 172292636b15SSebastian Ott if (!private) { 172392636b15SSebastian Ott private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); 172492636b15SSebastian Ott if (!private) { 1725fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1726fc19f381SStefan Haberland "Allocating memory for private DASD data " 1727fc19f381SStefan Haberland "failed\n"); 17281da177e4SLinus Torvalds return -ENOMEM; 17291da177e4SLinus Torvalds } 1730543691a4SSebastian Ott device->private = private; 173192636b15SSebastian Ott } else { 173292636b15SSebastian Ott memset(private, 0, sizeof(*private)); 17331da177e4SLinus Torvalds } 17341da177e4SLinus Torvalds /* Invalidate status of initial analysis. */ 17351da177e4SLinus Torvalds private->init_cqr_status = -1; 17361da177e4SLinus Torvalds /* Set default cache operations. */ 17371da177e4SLinus Torvalds private->attrib.operation = DASD_NORMAL_CACHE; 17381da177e4SLinus Torvalds private->attrib.nr_cyl = 0; 17391da177e4SLinus Torvalds 174040545573SHorst Hummel /* Read Configuration Data */ 174140545573SHorst Hummel rc = dasd_eckd_read_conf(device); 174240545573SHorst Hummel if (rc) 17438e09f215SStefan Weinhuber goto out_err1; 174440545573SHorst Hummel 1745a521b048SStefan Haberland /* set some default values */ 17467c8faa86SStefan Haberland device->default_expires = DASD_EXPIRES; 17471f1ee9adSHannes Reinecke device->default_retries = DASD_RETRIES; 1748a521b048SStefan Haberland device->path_thrhld = DASD_ECKD_PATH_THRHLD; 1749a521b048SStefan Haberland device->path_interval = DASD_ECKD_PATH_INTERVAL; 17501f1ee9adSHannes Reinecke 17517c8faa86SStefan Haberland if (private->gneq) { 17527c8faa86SStefan Haberland value = 1; 17537c8faa86SStefan Haberland for (i = 0; i < private->gneq->timeout.value; i++) 17547c8faa86SStefan Haberland value = 10 * value; 17557c8faa86SStefan Haberland value = value * private->gneq->timeout.number; 17567c8faa86SStefan Haberland /* do not accept useless values */ 17577c8faa86SStefan Haberland if (value != 0 && value <= DASD_EXPIRES_MAX) 17587c8faa86SStefan Haberland device->default_expires = value; 17597c8faa86SStefan Haberland } 17607c8faa86SStefan Haberland 17612dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 17622dedf0d9SStefan Haberland if (temp_uid.type == UA_BASE_DEVICE) { 17638e09f215SStefan Weinhuber block = dasd_alloc_block(); 17648e09f215SStefan Weinhuber if (IS_ERR(block)) { 1765b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1766b8ed5dd5SStefan Haberland "could not allocate dasd " 1767b8ed5dd5SStefan Haberland "block structure"); 17688e09f215SStefan Weinhuber rc = PTR_ERR(block); 17698e09f215SStefan Weinhuber goto out_err1; 17708e09f215SStefan Weinhuber } 17718e09f215SStefan Weinhuber device->block = block; 17728e09f215SStefan Weinhuber block->base = device; 17738e09f215SStefan Weinhuber } 17748e09f215SStefan Weinhuber 1775f9f8d02fSStefan Haberland /* register lcu with alias handling, enable PAV */ 1776f9f8d02fSStefan Haberland rc = dasd_alias_make_device_known_to_lcu(device); 1777f9f8d02fSStefan Haberland if (rc) 17788e09f215SStefan Weinhuber goto out_err2; 1779f9f8d02fSStefan Haberland 178012d7b107SStefan Haberland dasd_eckd_validate_server(device, 0); 1781f4ac1d02SStefan Weinhuber 1782f4ac1d02SStefan Weinhuber /* device may report different configuration data after LCU setup */ 1783f4ac1d02SStefan Weinhuber rc = dasd_eckd_read_conf(device); 178440545573SHorst Hummel if (rc) 17858e09f215SStefan Weinhuber goto out_err3; 17868e09f215SStefan Weinhuber 17878e09f215SStefan Weinhuber /* Read Feature Codes */ 178868d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 178940545573SHorst Hummel 17901da177e4SLinus Torvalds /* Read Device Characteristics */ 179168b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 179268b781feSStefan Haberland &private->rdc_data, 64); 17938e09f215SStefan Weinhuber if (rc) { 1794b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1795b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 17968e09f215SStefan Weinhuber goto out_err3; 17978e09f215SStefan Weinhuber } 179834cd551aSStefan Haberland 179934cd551aSStefan Haberland if ((device->features & DASD_FEATURE_USERAW) && 180034cd551aSStefan Haberland !(private->rdc_data.facilities.RT_in_LR)) { 180134cd551aSStefan Haberland dev_err(&device->cdev->dev, "The storage server does not " 180234cd551aSStefan Haberland "support raw-track access\n"); 180334cd551aSStefan Haberland rc = -EINVAL; 180434cd551aSStefan Haberland goto out_err3; 180534cd551aSStefan Haberland } 180634cd551aSStefan Haberland 1807817f2c84SNikanth Karthikesan /* find the valid cylinder size */ 1808b44b0ab3SStefan Weinhuber if (private->rdc_data.no_cyl == LV_COMPAT_CYL && 1809b44b0ab3SStefan Weinhuber private->rdc_data.long_no_cyl) 1810b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.long_no_cyl; 1811b44b0ab3SStefan Weinhuber else 1812b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.no_cyl; 1813b44b0ab3SStefan Weinhuber 1814ef19298bSStefan Weinhuber private->fcx_max_data = get_fcx_max_data(device); 1815ef19298bSStefan Weinhuber 181633b62a30SStefan Weinhuber readonly = dasd_device_is_ro(device); 181733b62a30SStefan Weinhuber if (readonly) 181833b62a30SStefan Weinhuber set_bit(DASD_FLAG_DEVICE_RO, &device->flags); 181933b62a30SStefan Weinhuber 1820fc19f381SStefan Haberland dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " 182133b62a30SStefan Weinhuber "with %d cylinders, %d heads, %d sectors%s\n", 18221da177e4SLinus Torvalds private->rdc_data.dev_type, 18231da177e4SLinus Torvalds private->rdc_data.dev_model, 18241da177e4SLinus Torvalds private->rdc_data.cu_type, 18251da177e4SLinus Torvalds private->rdc_data.cu_model.model, 1826b44b0ab3SStefan Weinhuber private->real_cyl, 18271da177e4SLinus Torvalds private->rdc_data.trk_per_cyl, 182833b62a30SStefan Weinhuber private->rdc_data.sec_per_trk, 182933b62a30SStefan Weinhuber readonly ? ", read-only device" : ""); 18308e09f215SStefan Weinhuber return 0; 18318e09f215SStefan Weinhuber 18328e09f215SStefan Weinhuber out_err3: 18338e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 18348e09f215SStefan Weinhuber out_err2: 18358e09f215SStefan Weinhuber dasd_free_block(device->block); 18368e09f215SStefan Weinhuber device->block = NULL; 18378e09f215SStefan Weinhuber out_err1: 18384abb08c2SStefan Weinhuber kfree(private->conf_data); 18398e09f215SStefan Weinhuber kfree(device->private); 18408e09f215SStefan Weinhuber device->private = NULL; 18413d052595SHorst Hummel return rc; 18421da177e4SLinus Torvalds } 18431da177e4SLinus Torvalds 18448e09f215SStefan Weinhuber static void dasd_eckd_uncheck_device(struct dasd_device *device) 18458e09f215SStefan Weinhuber { 1846543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1847b179b037SStefan Haberland int i; 18484abb08c2SStefan Weinhuber 18498e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 18504abb08c2SStefan Weinhuber private->ned = NULL; 18514abb08c2SStefan Weinhuber private->sneq = NULL; 18524abb08c2SStefan Weinhuber private->vdsneq = NULL; 18534abb08c2SStefan Weinhuber private->gneq = NULL; 18544abb08c2SStefan Weinhuber private->conf_len = 0; 1855b179b037SStefan Haberland for (i = 0; i < 8; i++) { 1856c9346151SStefan Haberland kfree(device->path[i].conf_data); 1857c9346151SStefan Haberland if ((__u8 *)device->path[i].conf_data == 1858b179b037SStefan Haberland private->conf_data) { 1859b179b037SStefan Haberland private->conf_data = NULL; 1860b179b037SStefan Haberland private->conf_len = 0; 1861b179b037SStefan Haberland } 1862c9346151SStefan Haberland device->path[i].conf_data = NULL; 1863a521b048SStefan Haberland device->path[i].cssid = 0; 1864a521b048SStefan Haberland device->path[i].ssid = 0; 1865a521b048SStefan Haberland device->path[i].chpid = 0; 1866b179b037SStefan Haberland } 18674abb08c2SStefan Weinhuber kfree(private->conf_data); 18684abb08c2SStefan Weinhuber private->conf_data = NULL; 18698e09f215SStefan Weinhuber } 18708e09f215SStefan Weinhuber 18711da177e4SLinus Torvalds static struct dasd_ccw_req * 18721da177e4SLinus Torvalds dasd_eckd_analysis_ccw(struct dasd_device *device) 18731da177e4SLinus Torvalds { 1874543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 18751da177e4SLinus Torvalds struct eckd_count *count_data; 18761da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 18771da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 18781da177e4SLinus Torvalds struct ccw1 *ccw; 18791da177e4SLinus Torvalds int cplength, datasize; 18801da177e4SLinus Torvalds int i; 18811da177e4SLinus Torvalds 18821da177e4SLinus Torvalds cplength = 8; 18831da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 188468b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 18851da177e4SLinus Torvalds if (IS_ERR(cqr)) 18861da177e4SLinus Torvalds return cqr; 18871da177e4SLinus Torvalds ccw = cqr->cpaddr; 18881da177e4SLinus Torvalds /* Define extent for the first 3 tracks. */ 18891da177e4SLinus Torvalds define_extent(ccw++, cqr->data, 0, 2, 18901da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device); 18911da177e4SLinus Torvalds LO_data = cqr->data + sizeof(struct DE_eckd_data); 18921da177e4SLinus Torvalds /* Locate record for the first 4 records on track 0. */ 18931da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18941da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 0, 0, 4, 18951da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 18961da177e4SLinus Torvalds 18971da177e4SLinus Torvalds count_data = private->count_area; 18981da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 18991da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 19001da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 19011da177e4SLinus Torvalds ccw->flags = 0; 19021da177e4SLinus Torvalds ccw->count = 8; 19031da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 19041da177e4SLinus Torvalds ccw++; 19051da177e4SLinus Torvalds count_data++; 19061da177e4SLinus Torvalds } 19071da177e4SLinus Torvalds 19081da177e4SLinus Torvalds /* Locate record for the first record on track 2. */ 19091da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 19101da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 2, 0, 1, 19111da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 19121da177e4SLinus Torvalds /* Read count ccw. */ 19131da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 19141da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 19151da177e4SLinus Torvalds ccw->flags = 0; 19161da177e4SLinus Torvalds ccw->count = 8; 19171da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 19181da177e4SLinus Torvalds 19198e09f215SStefan Weinhuber cqr->block = NULL; 19208e09f215SStefan Weinhuber cqr->startdev = device; 19218e09f215SStefan Weinhuber cqr->memdev = device; 1922eb6e199bSStefan Weinhuber cqr->retries = 255; 19231aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 19241da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 19251da177e4SLinus Torvalds return cqr; 19261da177e4SLinus Torvalds } 19271da177e4SLinus Torvalds 1928eb6e199bSStefan Weinhuber /* differentiate between 'no record found' and any other error */ 1929eb6e199bSStefan Weinhuber static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) 1930eb6e199bSStefan Weinhuber { 1931eb6e199bSStefan Weinhuber char *sense; 1932eb6e199bSStefan Weinhuber if (init_cqr->status == DASD_CQR_DONE) 1933eb6e199bSStefan Weinhuber return INIT_CQR_OK; 1934eb6e199bSStefan Weinhuber else if (init_cqr->status == DASD_CQR_NEED_ERP || 1935eb6e199bSStefan Weinhuber init_cqr->status == DASD_CQR_FAILED) { 1936eb6e199bSStefan Weinhuber sense = dasd_get_sense(&init_cqr->irb); 1937eb6e199bSStefan Weinhuber if (sense && (sense[1] & SNS1_NO_REC_FOUND)) 1938eb6e199bSStefan Weinhuber return INIT_CQR_UNFORMATTED; 1939eb6e199bSStefan Weinhuber else 1940eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 1941eb6e199bSStefan Weinhuber } else 1942eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 1943eb6e199bSStefan Weinhuber } 1944eb6e199bSStefan Weinhuber 19451da177e4SLinus Torvalds /* 19461da177e4SLinus Torvalds * This is the callback function for the init_analysis cqr. It saves 19471da177e4SLinus Torvalds * the status of the initial analysis ccw before it frees it and kicks 19481da177e4SLinus Torvalds * the device to continue the startup sequence. This will call 19491da177e4SLinus Torvalds * dasd_eckd_do_analysis again (if the devices has not been marked 19501da177e4SLinus Torvalds * for deletion in the meantime). 19511da177e4SLinus Torvalds */ 1952eb6e199bSStefan Weinhuber static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, 1953eb6e199bSStefan Weinhuber void *data) 19541da177e4SLinus Torvalds { 1955543691a4SSebastian Ott struct dasd_device *device = init_cqr->startdev; 1956543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 19571da177e4SLinus Torvalds 1958eb6e199bSStefan Weinhuber private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); 19591da177e4SLinus Torvalds dasd_sfree_request(init_cqr, device); 19601da177e4SLinus Torvalds dasd_kick_device(device); 19611da177e4SLinus Torvalds } 19621da177e4SLinus Torvalds 1963eb6e199bSStefan Weinhuber static int dasd_eckd_start_analysis(struct dasd_block *block) 19641da177e4SLinus Torvalds { 19651da177e4SLinus Torvalds struct dasd_ccw_req *init_cqr; 19661da177e4SLinus Torvalds 19678e09f215SStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(block->base); 19681da177e4SLinus Torvalds if (IS_ERR(init_cqr)) 19691da177e4SLinus Torvalds return PTR_ERR(init_cqr); 19701da177e4SLinus Torvalds init_cqr->callback = dasd_eckd_analysis_callback; 19711da177e4SLinus Torvalds init_cqr->callback_data = NULL; 19721da177e4SLinus Torvalds init_cqr->expires = 5*HZ; 1973eb6e199bSStefan Weinhuber /* first try without ERP, so we can later handle unformatted 1974eb6e199bSStefan Weinhuber * devices as special case 1975eb6e199bSStefan Weinhuber */ 1976eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); 1977eb6e199bSStefan Weinhuber init_cqr->retries = 0; 19781da177e4SLinus Torvalds dasd_add_request_head(init_cqr); 19791da177e4SLinus Torvalds return -EAGAIN; 19801da177e4SLinus Torvalds } 19811da177e4SLinus Torvalds 1982eb6e199bSStefan Weinhuber static int dasd_eckd_end_analysis(struct dasd_block *block) 19831da177e4SLinus Torvalds { 1984543691a4SSebastian Ott struct dasd_device *device = block->base; 1985543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 19861da177e4SLinus Torvalds struct eckd_count *count_area; 19871da177e4SLinus Torvalds unsigned int sb, blk_per_trk; 19881da177e4SLinus Torvalds int status, i; 1989eb6e199bSStefan Weinhuber struct dasd_ccw_req *init_cqr; 19901da177e4SLinus Torvalds 19911da177e4SLinus Torvalds status = private->init_cqr_status; 19921da177e4SLinus Torvalds private->init_cqr_status = -1; 1993eb6e199bSStefan Weinhuber if (status == INIT_CQR_ERROR) { 1994eb6e199bSStefan Weinhuber /* try again, this time with full ERP */ 1995eb6e199bSStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(device); 1996eb6e199bSStefan Weinhuber dasd_sleep_on(init_cqr); 1997eb6e199bSStefan Weinhuber status = dasd_eckd_analysis_evaluation(init_cqr); 1998eb6e199bSStefan Weinhuber dasd_sfree_request(init_cqr, device); 1999eb6e199bSStefan Weinhuber } 2000eb6e199bSStefan Weinhuber 2001e4dbb0f2SStefan Haberland if (device->features & DASD_FEATURE_USERAW) { 2002e4dbb0f2SStefan Haberland block->bp_block = DASD_RAW_BLOCKSIZE; 2003e4dbb0f2SStefan Haberland blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; 2004e4dbb0f2SStefan Haberland block->s2b_shift = 3; 2005e4dbb0f2SStefan Haberland goto raw; 2006e4dbb0f2SStefan Haberland } 2007e4dbb0f2SStefan Haberland 2008eb6e199bSStefan Weinhuber if (status == INIT_CQR_UNFORMATTED) { 2009eb6e199bSStefan Weinhuber dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); 20101da177e4SLinus Torvalds return -EMEDIUMTYPE; 2011eb6e199bSStefan Weinhuber } else if (status == INIT_CQR_ERROR) { 2012eb6e199bSStefan Weinhuber dev_err(&device->cdev->dev, 2013eb6e199bSStefan Weinhuber "Detecting the DASD disk layout failed because " 2014eb6e199bSStefan Weinhuber "of an I/O error\n"); 2015eb6e199bSStefan Weinhuber return -EIO; 20161da177e4SLinus Torvalds } 20171da177e4SLinus Torvalds 20181da177e4SLinus Torvalds private->uses_cdl = 1; 20191da177e4SLinus Torvalds /* Check Track 0 for Compatible Disk Layout */ 20201da177e4SLinus Torvalds count_area = NULL; 20211da177e4SLinus Torvalds for (i = 0; i < 3; i++) { 20221da177e4SLinus Torvalds if (private->count_area[i].kl != 4 || 20233bc9fef9SStefan Haberland private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 || 20243bc9fef9SStefan Haberland private->count_area[i].cyl != 0 || 20253bc9fef9SStefan Haberland private->count_area[i].head != count_area_head[i] || 20263bc9fef9SStefan Haberland private->count_area[i].record != count_area_rec[i]) { 20271da177e4SLinus Torvalds private->uses_cdl = 0; 20281da177e4SLinus Torvalds break; 20291da177e4SLinus Torvalds } 20301da177e4SLinus Torvalds } 20311da177e4SLinus Torvalds if (i == 3) 20321da177e4SLinus Torvalds count_area = &private->count_area[4]; 20331da177e4SLinus Torvalds 20341da177e4SLinus Torvalds if (private->uses_cdl == 0) { 20351da177e4SLinus Torvalds for (i = 0; i < 5; i++) { 20361da177e4SLinus Torvalds if ((private->count_area[i].kl != 0) || 20371da177e4SLinus Torvalds (private->count_area[i].dl != 20383bc9fef9SStefan Haberland private->count_area[0].dl) || 20393bc9fef9SStefan Haberland private->count_area[i].cyl != 0 || 20403bc9fef9SStefan Haberland private->count_area[i].head != count_area_head[i] || 20413bc9fef9SStefan Haberland private->count_area[i].record != count_area_rec[i]) 20421da177e4SLinus Torvalds break; 20431da177e4SLinus Torvalds } 20441da177e4SLinus Torvalds if (i == 5) 20451da177e4SLinus Torvalds count_area = &private->count_area[0]; 20461da177e4SLinus Torvalds } else { 20471da177e4SLinus Torvalds if (private->count_area[3].record == 1) 2048fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 2049fc19f381SStefan Haberland "Track 0 has no records following the VTOC\n"); 20501da177e4SLinus Torvalds } 2051e4dbb0f2SStefan Haberland 20521da177e4SLinus Torvalds if (count_area != NULL && count_area->kl == 0) { 20531da177e4SLinus Torvalds /* we found notthing violating our disk layout */ 20541da177e4SLinus Torvalds if (dasd_check_blocksize(count_area->dl) == 0) 20558e09f215SStefan Weinhuber block->bp_block = count_area->dl; 20561da177e4SLinus Torvalds } 20578e09f215SStefan Weinhuber if (block->bp_block == 0) { 2058fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 2059fc19f381SStefan Haberland "The disk layout of the DASD is not supported\n"); 20601da177e4SLinus Torvalds return -EMEDIUMTYPE; 20611da177e4SLinus Torvalds } 20628e09f215SStefan Weinhuber block->s2b_shift = 0; /* bits to shift 512 to get a block */ 20638e09f215SStefan Weinhuber for (sb = 512; sb < block->bp_block; sb = sb << 1) 20648e09f215SStefan Weinhuber block->s2b_shift++; 20651da177e4SLinus Torvalds 20668e09f215SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 2067e4dbb0f2SStefan Haberland 2068e4dbb0f2SStefan Haberland raw: 2069b44b0ab3SStefan Weinhuber block->blocks = (private->real_cyl * 20701da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 20711da177e4SLinus Torvalds blk_per_trk); 20721da177e4SLinus Torvalds 2073fc19f381SStefan Haberland dev_info(&device->cdev->dev, 2074fc19f381SStefan Haberland "DASD with %d KB/block, %d KB total size, %d KB/track, " 2075fc19f381SStefan Haberland "%s\n", (block->bp_block >> 10), 2076b44b0ab3SStefan Weinhuber ((private->real_cyl * 20771da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 20788e09f215SStefan Weinhuber blk_per_trk * (block->bp_block >> 9)) >> 1), 20798e09f215SStefan Weinhuber ((blk_per_trk * block->bp_block) >> 10), 20801da177e4SLinus Torvalds private->uses_cdl ? 20811da177e4SLinus Torvalds "compatible disk layout" : "linux disk layout"); 20821da177e4SLinus Torvalds 20831da177e4SLinus Torvalds return 0; 20841da177e4SLinus Torvalds } 20851da177e4SLinus Torvalds 20868e09f215SStefan Weinhuber static int dasd_eckd_do_analysis(struct dasd_block *block) 20871da177e4SLinus Torvalds { 2088543691a4SSebastian Ott struct dasd_eckd_private *private = block->base->private; 20891da177e4SLinus Torvalds 20901da177e4SLinus Torvalds if (private->init_cqr_status < 0) 20918e09f215SStefan Weinhuber return dasd_eckd_start_analysis(block); 20921da177e4SLinus Torvalds else 20938e09f215SStefan Weinhuber return dasd_eckd_end_analysis(block); 20941da177e4SLinus Torvalds } 20951da177e4SLinus Torvalds 2096d42e1712SStefan Haberland static int dasd_eckd_basic_to_ready(struct dasd_device *device) 20978e09f215SStefan Weinhuber { 20988e09f215SStefan Weinhuber return dasd_alias_add_device(device); 20998e09f215SStefan Weinhuber }; 21008e09f215SStefan Weinhuber 21018e09f215SStefan Weinhuber static int dasd_eckd_online_to_ready(struct dasd_device *device) 21028e09f215SStefan Weinhuber { 2103501183f2SStefan Haberland cancel_work_sync(&device->reload_device); 210425e2cf1cSStefan Haberland cancel_work_sync(&device->kick_validate); 2105d42e1712SStefan Haberland return 0; 2106d42e1712SStefan Haberland }; 2107d42e1712SStefan Haberland 2108daa991bfSStefan Haberland static int dasd_eckd_basic_to_known(struct dasd_device *device) 2109d42e1712SStefan Haberland { 21108e09f215SStefan Weinhuber return dasd_alias_remove_device(device); 21118e09f215SStefan Weinhuber }; 21128e09f215SStefan Weinhuber 21131da177e4SLinus Torvalds static int 21148e09f215SStefan Weinhuber dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 21151da177e4SLinus Torvalds { 2116543691a4SSebastian Ott struct dasd_eckd_private *private = block->base->private; 21171da177e4SLinus Torvalds 21188e09f215SStefan Weinhuber if (dasd_check_blocksize(block->bp_block) == 0) { 21191da177e4SLinus Torvalds geo->sectors = recs_per_track(&private->rdc_data, 21208e09f215SStefan Weinhuber 0, block->bp_block); 21211da177e4SLinus Torvalds } 21221da177e4SLinus Torvalds geo->cylinders = private->rdc_data.no_cyl; 21231da177e4SLinus Torvalds geo->heads = private->rdc_data.trk_per_cyl; 21241da177e4SLinus Torvalds return 0; 21251da177e4SLinus Torvalds } 21261da177e4SLinus Torvalds 21278fd57520SJan Höppner /* 21288fd57520SJan Höppner * Build the TCW request for the format check 21298fd57520SJan Höppner */ 21308fd57520SJan Höppner static struct dasd_ccw_req * 21318fd57520SJan Höppner dasd_eckd_build_check_tcw(struct dasd_device *base, struct format_data_t *fdata, 21328fd57520SJan Höppner int enable_pav, struct eckd_count *fmt_buffer, 21338fd57520SJan Höppner int rpt) 21348fd57520SJan Höppner { 21358fd57520SJan Höppner struct dasd_eckd_private *start_priv; 21368fd57520SJan Höppner struct dasd_device *startdev = NULL; 21378fd57520SJan Höppner struct tidaw *last_tidaw = NULL; 21388fd57520SJan Höppner struct dasd_ccw_req *cqr; 21398fd57520SJan Höppner struct itcw *itcw; 21408fd57520SJan Höppner int itcw_size; 21418fd57520SJan Höppner int count; 21428fd57520SJan Höppner int rc; 21438fd57520SJan Höppner int i; 21448fd57520SJan Höppner 21458fd57520SJan Höppner if (enable_pav) 21468fd57520SJan Höppner startdev = dasd_alias_get_start_dev(base); 21478fd57520SJan Höppner 21488fd57520SJan Höppner if (!startdev) 21498fd57520SJan Höppner startdev = base; 21508fd57520SJan Höppner 21518fd57520SJan Höppner start_priv = startdev->private; 21528fd57520SJan Höppner 21538fd57520SJan Höppner count = rpt * (fdata->stop_unit - fdata->start_unit + 1); 21548fd57520SJan Höppner 21558fd57520SJan Höppner /* 21568fd57520SJan Höppner * we're adding 'count' amount of tidaw to the itcw. 21578fd57520SJan Höppner * calculate the corresponding itcw_size 21588fd57520SJan Höppner */ 21598fd57520SJan Höppner itcw_size = itcw_calc_size(0, count, 0); 21608fd57520SJan Höppner 21618fd57520SJan Höppner cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 21628fd57520SJan Höppner if (IS_ERR(cqr)) 21638fd57520SJan Höppner return cqr; 21648fd57520SJan Höppner 21658fd57520SJan Höppner start_priv->count++; 21668fd57520SJan Höppner 21678fd57520SJan Höppner itcw = itcw_init(cqr->data, itcw_size, ITCW_OP_READ, 0, count, 0); 21688fd57520SJan Höppner if (IS_ERR(itcw)) { 21698fd57520SJan Höppner rc = -EINVAL; 21708fd57520SJan Höppner goto out_err; 21718fd57520SJan Höppner } 21728fd57520SJan Höppner 21738fd57520SJan Höppner cqr->cpaddr = itcw_get_tcw(itcw); 21748fd57520SJan Höppner rc = prepare_itcw(itcw, fdata->start_unit, fdata->stop_unit, 21758fd57520SJan Höppner DASD_ECKD_CCW_READ_COUNT_MT, base, startdev, 0, count, 21768fd57520SJan Höppner sizeof(struct eckd_count), 21778fd57520SJan Höppner count * sizeof(struct eckd_count), 0, rpt); 21788fd57520SJan Höppner if (rc) 21798fd57520SJan Höppner goto out_err; 21808fd57520SJan Höppner 21818fd57520SJan Höppner for (i = 0; i < count; i++) { 21828fd57520SJan Höppner last_tidaw = itcw_add_tidaw(itcw, 0, fmt_buffer++, 21838fd57520SJan Höppner sizeof(struct eckd_count)); 21848fd57520SJan Höppner if (IS_ERR(last_tidaw)) { 21858fd57520SJan Höppner rc = -EINVAL; 21868fd57520SJan Höppner goto out_err; 21878fd57520SJan Höppner } 21888fd57520SJan Höppner } 21898fd57520SJan Höppner 21908fd57520SJan Höppner last_tidaw->flags |= TIDAW_FLAGS_LAST; 21918fd57520SJan Höppner itcw_finalize(itcw); 21928fd57520SJan Höppner 21938fd57520SJan Höppner cqr->cpmode = 1; 21948fd57520SJan Höppner cqr->startdev = startdev; 21958fd57520SJan Höppner cqr->memdev = startdev; 21968fd57520SJan Höppner cqr->basedev = base; 21978fd57520SJan Höppner cqr->retries = startdev->default_retries; 21988fd57520SJan Höppner cqr->expires = startdev->default_expires * HZ; 21998fd57520SJan Höppner cqr->buildclk = get_tod_clock(); 22008fd57520SJan Höppner cqr->status = DASD_CQR_FILLED; 22018fd57520SJan Höppner /* Set flags to suppress output for expected errors */ 22028fd57520SJan Höppner set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); 22038fd57520SJan Höppner set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); 22048fd57520SJan Höppner 22058fd57520SJan Höppner return cqr; 22068fd57520SJan Höppner 22078fd57520SJan Höppner out_err: 22088fd57520SJan Höppner dasd_sfree_request(cqr, startdev); 22098fd57520SJan Höppner 22108fd57520SJan Höppner return ERR_PTR(rc); 22118fd57520SJan Höppner } 22128fd57520SJan Höppner 22138fd57520SJan Höppner /* 22148fd57520SJan Höppner * Build the CCW request for the format check 22158fd57520SJan Höppner */ 22168fd57520SJan Höppner static struct dasd_ccw_req * 22178fd57520SJan Höppner dasd_eckd_build_check(struct dasd_device *base, struct format_data_t *fdata, 22188fd57520SJan Höppner int enable_pav, struct eckd_count *fmt_buffer, int rpt) 22198fd57520SJan Höppner { 22208fd57520SJan Höppner struct dasd_eckd_private *start_priv; 22218fd57520SJan Höppner struct dasd_eckd_private *base_priv; 22228fd57520SJan Höppner struct dasd_device *startdev = NULL; 22238fd57520SJan Höppner struct dasd_ccw_req *cqr; 22248fd57520SJan Höppner struct ccw1 *ccw; 22258fd57520SJan Höppner void *data; 22268fd57520SJan Höppner int cplength, datasize; 22278fd57520SJan Höppner int use_prefix; 22288fd57520SJan Höppner int count; 22298fd57520SJan Höppner int i; 22308fd57520SJan Höppner 22318fd57520SJan Höppner if (enable_pav) 22328fd57520SJan Höppner startdev = dasd_alias_get_start_dev(base); 22338fd57520SJan Höppner 22348fd57520SJan Höppner if (!startdev) 22358fd57520SJan Höppner startdev = base; 22368fd57520SJan Höppner 22378fd57520SJan Höppner start_priv = startdev->private; 22388fd57520SJan Höppner base_priv = base->private; 22398fd57520SJan Höppner 22408fd57520SJan Höppner count = rpt * (fdata->stop_unit - fdata->start_unit + 1); 22418fd57520SJan Höppner 22428fd57520SJan Höppner use_prefix = base_priv->features.feature[8] & 0x01; 22438fd57520SJan Höppner 22448fd57520SJan Höppner if (use_prefix) { 22458fd57520SJan Höppner cplength = 1; 22468fd57520SJan Höppner datasize = sizeof(struct PFX_eckd_data); 22478fd57520SJan Höppner } else { 22488fd57520SJan Höppner cplength = 2; 22498fd57520SJan Höppner datasize = sizeof(struct DE_eckd_data) + 22508fd57520SJan Höppner sizeof(struct LO_eckd_data); 22518fd57520SJan Höppner } 22528fd57520SJan Höppner cplength += count; 22538fd57520SJan Höppner 22548fd57520SJan Höppner cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 22558fd57520SJan Höppner startdev); 22568fd57520SJan Höppner if (IS_ERR(cqr)) 22578fd57520SJan Höppner return cqr; 22588fd57520SJan Höppner 22598fd57520SJan Höppner start_priv->count++; 22608fd57520SJan Höppner data = cqr->data; 22618fd57520SJan Höppner ccw = cqr->cpaddr; 22628fd57520SJan Höppner 22638fd57520SJan Höppner if (use_prefix) { 22648fd57520SJan Höppner prefix_LRE(ccw++, data, fdata->start_unit, fdata->stop_unit, 22658fd57520SJan Höppner DASD_ECKD_CCW_READ_COUNT, base, startdev, 1, 0, 22668fd57520SJan Höppner count, 0, 0); 22678fd57520SJan Höppner } else { 22688fd57520SJan Höppner define_extent(ccw++, data, fdata->start_unit, fdata->stop_unit, 22698fd57520SJan Höppner DASD_ECKD_CCW_READ_COUNT, startdev); 22708fd57520SJan Höppner 22718fd57520SJan Höppner data += sizeof(struct DE_eckd_data); 22728fd57520SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 22738fd57520SJan Höppner 22748fd57520SJan Höppner locate_record(ccw++, data, fdata->start_unit, 0, count, 22758fd57520SJan Höppner DASD_ECKD_CCW_READ_COUNT, base, 0); 22768fd57520SJan Höppner } 22778fd57520SJan Höppner 22788fd57520SJan Höppner for (i = 0; i < count; i++) { 22798fd57520SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 22808fd57520SJan Höppner ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 22818fd57520SJan Höppner ccw->flags = CCW_FLAG_SLI; 22828fd57520SJan Höppner ccw->count = 8; 22838fd57520SJan Höppner ccw->cda = (__u32)(addr_t) fmt_buffer; 22848fd57520SJan Höppner ccw++; 22858fd57520SJan Höppner fmt_buffer++; 22868fd57520SJan Höppner } 22878fd57520SJan Höppner 22888fd57520SJan Höppner cqr->startdev = startdev; 22898fd57520SJan Höppner cqr->memdev = startdev; 22908fd57520SJan Höppner cqr->basedev = base; 22918fd57520SJan Höppner cqr->retries = DASD_RETRIES; 22928fd57520SJan Höppner cqr->expires = startdev->default_expires * HZ; 22938fd57520SJan Höppner cqr->buildclk = get_tod_clock(); 22948fd57520SJan Höppner cqr->status = DASD_CQR_FILLED; 22958fd57520SJan Höppner /* Set flags to suppress output for expected errors */ 22968fd57520SJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 22978fd57520SJan Höppner 22988fd57520SJan Höppner return cqr; 22998fd57520SJan Höppner } 23008fd57520SJan Höppner 23011da177e4SLinus Torvalds static struct dasd_ccw_req * 2302d42e1712SStefan Haberland dasd_eckd_build_format(struct dasd_device *base, 230329b8dd9dSStefan Haberland struct format_data_t *fdata, 2304a94fa154SStefan Haberland int enable_pav) 23051da177e4SLinus Torvalds { 2306d42e1712SStefan Haberland struct dasd_eckd_private *base_priv; 2307d42e1712SStefan Haberland struct dasd_eckd_private *start_priv; 230829b8dd9dSStefan Haberland struct dasd_device *startdev = NULL; 23091da177e4SLinus Torvalds struct dasd_ccw_req *fcp; 23101da177e4SLinus Torvalds struct eckd_count *ect; 2311d42e1712SStefan Haberland struct ch_t address; 23121da177e4SLinus Torvalds struct ccw1 *ccw; 23131da177e4SLinus Torvalds void *data; 2314b44b0ab3SStefan Weinhuber int rpt; 23151da177e4SLinus Torvalds int cplength, datasize; 2316d42e1712SStefan Haberland int i, j; 2317f9a28f7bSJean-Baptiste Joret int intensity = 0; 2318f9a28f7bSJean-Baptiste Joret int r0_perm; 2319d42e1712SStefan Haberland int nr_tracks; 232018d6624eSStefan Haberland int use_prefix; 23211da177e4SLinus Torvalds 2322a94fa154SStefan Haberland if (enable_pav) 2323d42e1712SStefan Haberland startdev = dasd_alias_get_start_dev(base); 232429b8dd9dSStefan Haberland 2325d42e1712SStefan Haberland if (!startdev) 2326d42e1712SStefan Haberland startdev = base; 23271da177e4SLinus Torvalds 2328543691a4SSebastian Ott start_priv = startdev->private; 2329543691a4SSebastian Ott base_priv = base->private; 2330d42e1712SStefan Haberland 2331d42e1712SStefan Haberland rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize); 2332d42e1712SStefan Haberland 2333d42e1712SStefan Haberland nr_tracks = fdata->stop_unit - fdata->start_unit + 1; 23341da177e4SLinus Torvalds 23351da177e4SLinus Torvalds /* 23361da177e4SLinus Torvalds * fdata->intensity is a bit string that tells us what to do: 23371da177e4SLinus Torvalds * Bit 0: write record zero 23381da177e4SLinus Torvalds * Bit 1: write home address, currently not supported 23391da177e4SLinus Torvalds * Bit 2: invalidate tracks 23401da177e4SLinus Torvalds * Bit 3: use OS/390 compatible disk layout (cdl) 2341f9a28f7bSJean-Baptiste Joret * Bit 4: do not allow storage subsystem to modify record zero 23421da177e4SLinus Torvalds * Only some bit combinations do make sense. 23431da177e4SLinus Torvalds */ 2344f9a28f7bSJean-Baptiste Joret if (fdata->intensity & 0x10) { 2345f9a28f7bSJean-Baptiste Joret r0_perm = 0; 2346f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity & ~0x10; 2347f9a28f7bSJean-Baptiste Joret } else { 2348f9a28f7bSJean-Baptiste Joret r0_perm = 1; 2349f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity; 2350f9a28f7bSJean-Baptiste Joret } 2351d42e1712SStefan Haberland 235218d6624eSStefan Haberland use_prefix = base_priv->features.feature[8] & 0x01; 235318d6624eSStefan Haberland 2354f9a28f7bSJean-Baptiste Joret switch (intensity) { 23551da177e4SLinus Torvalds case 0x00: /* Normal format */ 23561da177e4SLinus Torvalds case 0x08: /* Normal format, use cdl. */ 2357d42e1712SStefan Haberland cplength = 2 + (rpt*nr_tracks); 235818d6624eSStefan Haberland if (use_prefix) 2359d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 23601da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 2361d42e1712SStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 236218d6624eSStefan Haberland else 236318d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 236418d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 236518d6624eSStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 23661da177e4SLinus Torvalds break; 23671da177e4SLinus Torvalds case 0x01: /* Write record zero and format track. */ 23681da177e4SLinus Torvalds case 0x09: /* Write record zero and format track, use cdl. */ 2369d42e1712SStefan Haberland cplength = 2 + rpt * nr_tracks; 237018d6624eSStefan Haberland if (use_prefix) 2371d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 23721da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 23731da177e4SLinus Torvalds sizeof(struct eckd_count) + 2374d42e1712SStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 237518d6624eSStefan Haberland else 237618d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 237718d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 237818d6624eSStefan Haberland sizeof(struct eckd_count) + 237918d6624eSStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 23801da177e4SLinus Torvalds break; 23811da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 23821da177e4SLinus Torvalds case 0x0c: /* Invalidate track, use cdl. */ 23831da177e4SLinus Torvalds cplength = 3; 238418d6624eSStefan Haberland if (use_prefix) 2385d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 23861da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 23871da177e4SLinus Torvalds sizeof(struct eckd_count); 238818d6624eSStefan Haberland else 238918d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 239018d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 239118d6624eSStefan Haberland sizeof(struct eckd_count); 23921da177e4SLinus Torvalds break; 23931da177e4SLinus Torvalds default: 2394d42e1712SStefan Haberland dev_warn(&startdev->cdev->dev, 2395d42e1712SStefan Haberland "An I/O control call used incorrect flags 0x%x\n", 2396d42e1712SStefan Haberland fdata->intensity); 23971da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 23981da177e4SLinus Torvalds } 23991da177e4SLinus Torvalds /* Allocate the format ccw request. */ 2400d42e1712SStefan Haberland fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 2401d42e1712SStefan Haberland datasize, startdev); 24021da177e4SLinus Torvalds if (IS_ERR(fcp)) 24031da177e4SLinus Torvalds return fcp; 24041da177e4SLinus Torvalds 2405d42e1712SStefan Haberland start_priv->count++; 24061da177e4SLinus Torvalds data = fcp->data; 24071da177e4SLinus Torvalds ccw = fcp->cpaddr; 24081da177e4SLinus Torvalds 2409f9a28f7bSJean-Baptiste Joret switch (intensity & ~0x08) { 24101da177e4SLinus Torvalds case 0x00: /* Normal format. */ 241118d6624eSStefan Haberland if (use_prefix) { 2412d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2413d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 2414d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2415f9a28f7bSJean-Baptiste Joret /* grant subsystem permission to format R0 */ 2416f9a28f7bSJean-Baptiste Joret if (r0_perm) 2417d42e1712SStefan Haberland ((struct PFX_eckd_data *)data) 2418d42e1712SStefan Haberland ->define_extent.ga_extended |= 0x04; 2419d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 242018d6624eSStefan Haberland } else { 242118d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 242218d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 242318d6624eSStefan Haberland DASD_ECKD_CCW_WRITE_CKD, startdev); 242418d6624eSStefan Haberland /* grant subsystem permission to format R0 */ 242518d6624eSStefan Haberland if (r0_perm) 242618d6624eSStefan Haberland ((struct DE_eckd_data *) data) 242718d6624eSStefan Haberland ->ga_extended |= 0x04; 242818d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 242918d6624eSStefan Haberland } 24301da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 24311da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 2432d42e1712SStefan Haberland fdata->start_unit, 0, rpt*nr_tracks, 2433d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, 24341da177e4SLinus Torvalds fdata->blksize); 24351da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 24361da177e4SLinus Torvalds break; 24371da177e4SLinus Torvalds case 0x01: /* Write record zero + format track. */ 243818d6624eSStefan Haberland if (use_prefix) { 2439d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2440d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 24411da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, 2442d42e1712SStefan Haberland base, startdev); 2443d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 244418d6624eSStefan Haberland } else { 244518d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 244618d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 244718d6624eSStefan Haberland DASD_ECKD_CCW_WRITE_RECORD_ZERO, startdev); 244818d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 244918d6624eSStefan Haberland } 24501da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 24511da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 2452d42e1712SStefan Haberland fdata->start_unit, 0, rpt * nr_tracks + 1, 2453d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_RECORD_ZERO, base, 2454d42e1712SStefan Haberland base->block->bp_block); 24551da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 24561da177e4SLinus Torvalds break; 24571da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 245818d6624eSStefan Haberland if (use_prefix) { 2459d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2460d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 2461d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2462d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 246318d6624eSStefan Haberland } else { 246418d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 246518d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 246618d6624eSStefan Haberland DASD_ECKD_CCW_WRITE_CKD, startdev); 246718d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 246818d6624eSStefan Haberland } 24691da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 24701da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 24711da177e4SLinus Torvalds fdata->start_unit, 0, 1, 2472d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, 8); 24731da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 24741da177e4SLinus Torvalds break; 24751da177e4SLinus Torvalds } 2476d42e1712SStefan Haberland 2477d42e1712SStefan Haberland for (j = 0; j < nr_tracks; j++) { 2478d42e1712SStefan Haberland /* calculate cylinder and head for the current track */ 2479d42e1712SStefan Haberland set_ch_t(&address, 2480d42e1712SStefan Haberland (fdata->start_unit + j) / 2481d42e1712SStefan Haberland base_priv->rdc_data.trk_per_cyl, 2482d42e1712SStefan Haberland (fdata->start_unit + j) % 2483d42e1712SStefan Haberland base_priv->rdc_data.trk_per_cyl); 2484f9a28f7bSJean-Baptiste Joret if (intensity & 0x01) { /* write record zero */ 24851da177e4SLinus Torvalds ect = (struct eckd_count *) data; 24861da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2487b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2488b44b0ab3SStefan Weinhuber ect->head = address.head; 24891da177e4SLinus Torvalds ect->record = 0; 24901da177e4SLinus Torvalds ect->kl = 0; 24911da177e4SLinus Torvalds ect->dl = 8; 24921da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 24931da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 24941da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 24951da177e4SLinus Torvalds ccw->count = 8; 24961da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 24971da177e4SLinus Torvalds ccw++; 24981da177e4SLinus Torvalds } 2499f9a28f7bSJean-Baptiste Joret if ((intensity & ~0x08) & 0x04) { /* erase track */ 25001da177e4SLinus Torvalds ect = (struct eckd_count *) data; 25011da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2502b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2503b44b0ab3SStefan Weinhuber ect->head = address.head; 25041da177e4SLinus Torvalds ect->record = 1; 25051da177e4SLinus Torvalds ect->kl = 0; 25061da177e4SLinus Torvalds ect->dl = 0; 25071da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 25081da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 25091da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 25101da177e4SLinus Torvalds ccw->count = 8; 25111da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 25121da177e4SLinus Torvalds } else { /* write remaining records */ 25131da177e4SLinus Torvalds for (i = 0; i < rpt; i++) { 25141da177e4SLinus Torvalds ect = (struct eckd_count *) data; 25151da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2516b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2517b44b0ab3SStefan Weinhuber ect->head = address.head; 25181da177e4SLinus Torvalds ect->record = i + 1; 25191da177e4SLinus Torvalds ect->kl = 0; 25201da177e4SLinus Torvalds ect->dl = fdata->blksize; 2521d42e1712SStefan Haberland /* 2522d42e1712SStefan Haberland * Check for special tracks 0-1 2523d42e1712SStefan Haberland * when formatting CDL 2524d42e1712SStefan Haberland */ 2525f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 252646d1c03cSJan Höppner address.cyl == 0 && address.head == 0) { 25271da177e4SLinus Torvalds if (i < 3) { 25281da177e4SLinus Torvalds ect->kl = 4; 25291da177e4SLinus Torvalds ect->dl = sizes_trk0[i] - 4; 25301da177e4SLinus Torvalds } 25311da177e4SLinus Torvalds } 2532f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 253346d1c03cSJan Höppner address.cyl == 0 && address.head == 1) { 25341da177e4SLinus Torvalds ect->kl = 44; 25351da177e4SLinus Torvalds ect->dl = LABEL_SIZE - 44; 25361da177e4SLinus Torvalds } 25371da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 2538d42e1712SStefan Haberland if (i != 0 || j == 0) 2539d42e1712SStefan Haberland ccw->cmd_code = 2540d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD; 2541d42e1712SStefan Haberland else 2542d42e1712SStefan Haberland ccw->cmd_code = 2543d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD_MT; 25441da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 25451da177e4SLinus Torvalds ccw->count = 8; 25461da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 25471da177e4SLinus Torvalds ccw++; 25481da177e4SLinus Torvalds } 25491da177e4SLinus Torvalds } 2550d42e1712SStefan Haberland } 2551d42e1712SStefan Haberland 2552d42e1712SStefan Haberland fcp->startdev = startdev; 2553d42e1712SStefan Haberland fcp->memdev = startdev; 255429b8dd9dSStefan Haberland fcp->basedev = base; 2555eb6e199bSStefan Weinhuber fcp->retries = 256; 2556d42e1712SStefan Haberland fcp->expires = startdev->default_expires * HZ; 25571aae0560SHeiko Carstens fcp->buildclk = get_tod_clock(); 25581da177e4SLinus Torvalds fcp->status = DASD_CQR_FILLED; 2559d42e1712SStefan Haberland 25601da177e4SLinus Torvalds return fcp; 25611da177e4SLinus Torvalds } 25621da177e4SLinus Torvalds 2563570d237cSJan Höppner /* 2564570d237cSJan Höppner * Wrapper function to build a CCW request depending on input data 2565570d237cSJan Höppner */ 2566570d237cSJan Höppner static struct dasd_ccw_req * 2567570d237cSJan Höppner dasd_eckd_format_build_ccw_req(struct dasd_device *base, 25688fd57520SJan Höppner struct format_data_t *fdata, int enable_pav, 25698fd57520SJan Höppner int tpm, struct eckd_count *fmt_buffer, int rpt) 2570d42e1712SStefan Haberland { 25718fd57520SJan Höppner struct dasd_ccw_req *ccw_req; 25728fd57520SJan Höppner 25738fd57520SJan Höppner if (!fmt_buffer) { 25748fd57520SJan Höppner ccw_req = dasd_eckd_build_format(base, fdata, enable_pav); 25758fd57520SJan Höppner } else { 25768fd57520SJan Höppner if (tpm) 25778fd57520SJan Höppner ccw_req = dasd_eckd_build_check_tcw(base, fdata, 25788fd57520SJan Höppner enable_pav, 25798fd57520SJan Höppner fmt_buffer, rpt); 25808fd57520SJan Höppner else 25818fd57520SJan Höppner ccw_req = dasd_eckd_build_check(base, fdata, enable_pav, 25828fd57520SJan Höppner fmt_buffer, rpt); 25838fd57520SJan Höppner } 25848fd57520SJan Höppner 25858fd57520SJan Höppner return ccw_req; 2586570d237cSJan Höppner } 2587570d237cSJan Höppner 2588570d237cSJan Höppner /* 2589570d237cSJan Höppner * Sanity checks on format_data 2590570d237cSJan Höppner */ 2591570d237cSJan Höppner static int dasd_eckd_format_sanity_checks(struct dasd_device *base, 2592570d237cSJan Höppner struct format_data_t *fdata) 2593570d237cSJan Höppner { 2594543691a4SSebastian Ott struct dasd_eckd_private *private = base->private; 2595d42e1712SStefan Haberland 2596d42e1712SStefan Haberland if (fdata->start_unit >= 2597d42e1712SStefan Haberland (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2598d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2599d42e1712SStefan Haberland "Start track number %u used in formatting is too big\n", 2600d42e1712SStefan Haberland fdata->start_unit); 2601d42e1712SStefan Haberland return -EINVAL; 2602d42e1712SStefan Haberland } 2603d42e1712SStefan Haberland if (fdata->stop_unit >= 2604d42e1712SStefan Haberland (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2605d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2606d42e1712SStefan Haberland "Stop track number %u used in formatting is too big\n", 2607d42e1712SStefan Haberland fdata->stop_unit); 2608d42e1712SStefan Haberland return -EINVAL; 2609d42e1712SStefan Haberland } 2610d42e1712SStefan Haberland if (fdata->start_unit > fdata->stop_unit) { 2611d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2612d42e1712SStefan Haberland "Start track %u used in formatting exceeds end track\n", 2613d42e1712SStefan Haberland fdata->start_unit); 2614d42e1712SStefan Haberland return -EINVAL; 2615d42e1712SStefan Haberland } 2616d42e1712SStefan Haberland if (dasd_check_blocksize(fdata->blksize) != 0) { 2617d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2618d42e1712SStefan Haberland "The DASD cannot be formatted with block size %u\n", 2619d42e1712SStefan Haberland fdata->blksize); 2620d42e1712SStefan Haberland return -EINVAL; 2621d42e1712SStefan Haberland } 2622570d237cSJan Höppner return 0; 2623570d237cSJan Höppner } 2624570d237cSJan Höppner 2625570d237cSJan Höppner /* 2626570d237cSJan Höppner * This function will process format_data originally coming from an IOCTL 2627570d237cSJan Höppner */ 2628570d237cSJan Höppner static int dasd_eckd_format_process_data(struct dasd_device *base, 2629570d237cSJan Höppner struct format_data_t *fdata, 26308fd57520SJan Höppner int enable_pav, int tpm, 26318fd57520SJan Höppner struct eckd_count *fmt_buffer, int rpt, 26328fd57520SJan Höppner struct irb *irb) 2633570d237cSJan Höppner { 2634543691a4SSebastian Ott struct dasd_eckd_private *private = base->private; 2635570d237cSJan Höppner struct dasd_ccw_req *cqr, *n; 2636570d237cSJan Höppner struct list_head format_queue; 2637570d237cSJan Höppner struct dasd_device *device; 26388fd57520SJan Höppner char *sense = NULL; 2639570d237cSJan Höppner int old_start, old_stop, format_step; 2640570d237cSJan Höppner int step, retry; 2641570d237cSJan Höppner int rc; 2642570d237cSJan Höppner 2643570d237cSJan Höppner rc = dasd_eckd_format_sanity_checks(base, fdata); 2644570d237cSJan Höppner if (rc) 2645570d237cSJan Höppner return rc; 2646d42e1712SStefan Haberland 2647d42e1712SStefan Haberland INIT_LIST_HEAD(&format_queue); 2648d42e1712SStefan Haberland 264946d1c03cSJan Höppner old_start = fdata->start_unit; 265029b8dd9dSStefan Haberland old_stop = fdata->stop_unit; 2651d42e1712SStefan Haberland 26528fd57520SJan Höppner if (!tpm && fmt_buffer != NULL) { 26538fd57520SJan Höppner /* Command Mode / Format Check */ 26548fd57520SJan Höppner format_step = 1; 26558fd57520SJan Höppner } else if (tpm && fmt_buffer != NULL) { 26568fd57520SJan Höppner /* Transport Mode / Format Check */ 26578fd57520SJan Höppner format_step = DASD_CQR_MAX_CCW / rpt; 26588fd57520SJan Höppner } else { 26598fd57520SJan Höppner /* Normal Formatting */ 26608fd57520SJan Höppner format_step = DASD_CQR_MAX_CCW / 26618fd57520SJan Höppner recs_per_track(&private->rdc_data, 0, fdata->blksize); 26628fd57520SJan Höppner } 26638fd57520SJan Höppner 266446d1c03cSJan Höppner do { 266546d1c03cSJan Höppner retry = 0; 2666d42e1712SStefan Haberland while (fdata->start_unit <= old_stop) { 2667d42e1712SStefan Haberland step = fdata->stop_unit - fdata->start_unit + 1; 266846d1c03cSJan Höppner if (step > format_step) { 266946d1c03cSJan Höppner fdata->stop_unit = 267046d1c03cSJan Höppner fdata->start_unit + format_step - 1; 267146d1c03cSJan Höppner } 2672d42e1712SStefan Haberland 2673570d237cSJan Höppner cqr = dasd_eckd_format_build_ccw_req(base, fdata, 26748fd57520SJan Höppner enable_pav, tpm, 26758fd57520SJan Höppner fmt_buffer, rpt); 2676d42e1712SStefan Haberland if (IS_ERR(cqr)) { 267746d1c03cSJan Höppner rc = PTR_ERR(cqr); 267846d1c03cSJan Höppner if (rc == -ENOMEM) { 267946d1c03cSJan Höppner if (list_empty(&format_queue)) 268046d1c03cSJan Höppner goto out; 2681d42e1712SStefan Haberland /* 268246d1c03cSJan Höppner * not enough memory available, start 268346d1c03cSJan Höppner * requests retry after first requests 268446d1c03cSJan Höppner * were finished 2685d42e1712SStefan Haberland */ 268646d1c03cSJan Höppner retry = 1; 268746d1c03cSJan Höppner break; 2688d42e1712SStefan Haberland } 268946d1c03cSJan Höppner goto out_err; 269046d1c03cSJan Höppner } 269146d1c03cSJan Höppner list_add_tail(&cqr->blocklist, &format_queue); 2692d42e1712SStefan Haberland 26938fd57520SJan Höppner if (fmt_buffer) { 26948fd57520SJan Höppner step = fdata->stop_unit - fdata->start_unit + 1; 26958fd57520SJan Höppner fmt_buffer += rpt * step; 26968fd57520SJan Höppner } 2697d42e1712SStefan Haberland fdata->start_unit = fdata->stop_unit + 1; 2698d42e1712SStefan Haberland fdata->stop_unit = old_stop; 2699d42e1712SStefan Haberland } 2700d42e1712SStefan Haberland 270146d1c03cSJan Höppner rc = dasd_sleep_on_queue(&format_queue); 2702d42e1712SStefan Haberland 270346d1c03cSJan Höppner out_err: 2704d42e1712SStefan Haberland list_for_each_entry_safe(cqr, n, &format_queue, blocklist) { 2705d42e1712SStefan Haberland device = cqr->startdev; 2706543691a4SSebastian Ott private = device->private; 27078fd57520SJan Höppner 27088fd57520SJan Höppner if (cqr->status == DASD_CQR_FAILED) { 27098fd57520SJan Höppner /* 27108fd57520SJan Höppner * Only get sense data if called by format 27118fd57520SJan Höppner * check 27128fd57520SJan Höppner */ 27138fd57520SJan Höppner if (fmt_buffer && irb) { 27148fd57520SJan Höppner sense = dasd_get_sense(&cqr->irb); 27158fd57520SJan Höppner memcpy(irb, &cqr->irb, sizeof(*irb)); 27168fd57520SJan Höppner } 2717d42e1712SStefan Haberland rc = -EIO; 27188fd57520SJan Höppner } 2719d42e1712SStefan Haberland list_del_init(&cqr->blocklist); 2720d42e1712SStefan Haberland dasd_sfree_request(cqr, device); 2721d42e1712SStefan Haberland private->count--; 2722d42e1712SStefan Haberland } 2723d42e1712SStefan Haberland 27248fd57520SJan Höppner if (rc && rc != -EIO) 272546d1c03cSJan Höppner goto out; 27268fd57520SJan Höppner if (rc == -EIO) { 27278fd57520SJan Höppner /* 27288fd57520SJan Höppner * In case fewer than the expected records are on the 27298fd57520SJan Höppner * track, we will most likely get a 'No Record Found' 27308fd57520SJan Höppner * error (in command mode) or a 'File Protected' error 27318fd57520SJan Höppner * (in transport mode). Those particular cases shouldn't 27328fd57520SJan Höppner * pass the -EIO to the IOCTL, therefore reset the rc 27338fd57520SJan Höppner * and continue. 27348fd57520SJan Höppner */ 27358fd57520SJan Höppner if (sense && 27368fd57520SJan Höppner (sense[1] & SNS1_NO_REC_FOUND || 27378fd57520SJan Höppner sense[1] & SNS1_FILE_PROTECTED)) 27388fd57520SJan Höppner retry = 1; 27398fd57520SJan Höppner else 27408fd57520SJan Höppner goto out; 27418fd57520SJan Höppner } 274229b8dd9dSStefan Haberland 274346d1c03cSJan Höppner } while (retry); 274446d1c03cSJan Höppner 274546d1c03cSJan Höppner out: 274646d1c03cSJan Höppner fdata->start_unit = old_start; 274746d1c03cSJan Höppner fdata->stop_unit = old_stop; 2748d42e1712SStefan Haberland 2749d42e1712SStefan Haberland return rc; 2750d42e1712SStefan Haberland } 2751d42e1712SStefan Haberland 2752570d237cSJan Höppner static int dasd_eckd_format_device(struct dasd_device *base, 2753570d237cSJan Höppner struct format_data_t *fdata, int enable_pav) 2754570d237cSJan Höppner { 27558fd57520SJan Höppner return dasd_eckd_format_process_data(base, fdata, enable_pav, 0, NULL, 27568fd57520SJan Höppner 0, NULL); 27578fd57520SJan Höppner } 27588fd57520SJan Höppner 27598fd57520SJan Höppner /* 27608fd57520SJan Höppner * Helper function to count consecutive records of a single track. 27618fd57520SJan Höppner */ 27628fd57520SJan Höppner static int dasd_eckd_count_records(struct eckd_count *fmt_buffer, int start, 27638fd57520SJan Höppner int max) 27648fd57520SJan Höppner { 27658fd57520SJan Höppner int head; 27668fd57520SJan Höppner int i; 27678fd57520SJan Höppner 27688fd57520SJan Höppner head = fmt_buffer[start].head; 27698fd57520SJan Höppner 27708fd57520SJan Höppner /* 27718fd57520SJan Höppner * There are 3 conditions where we stop counting: 27728fd57520SJan Höppner * - if data reoccurs (same head and record may reoccur), which may 27738fd57520SJan Höppner * happen due to the way DASD_ECKD_CCW_READ_COUNT works 27748fd57520SJan Höppner * - when the head changes, because we're iterating over several tracks 27758fd57520SJan Höppner * then (DASD_ECKD_CCW_READ_COUNT_MT) 27768fd57520SJan Höppner * - when we've reached the end of sensible data in the buffer (the 27778fd57520SJan Höppner * record will be 0 then) 27788fd57520SJan Höppner */ 27798fd57520SJan Höppner for (i = start; i < max; i++) { 27808fd57520SJan Höppner if (i > start) { 27818fd57520SJan Höppner if ((fmt_buffer[i].head == head && 27828fd57520SJan Höppner fmt_buffer[i].record == 1) || 27838fd57520SJan Höppner fmt_buffer[i].head != head || 27848fd57520SJan Höppner fmt_buffer[i].record == 0) 27858fd57520SJan Höppner break; 27868fd57520SJan Höppner } 27878fd57520SJan Höppner } 27888fd57520SJan Höppner 27898fd57520SJan Höppner return i - start; 27908fd57520SJan Höppner } 27918fd57520SJan Höppner 27928fd57520SJan Höppner /* 27938fd57520SJan Höppner * Evaluate a given range of tracks. Data like number of records, blocksize, 27948fd57520SJan Höppner * record ids, and key length are compared with expected data. 27958fd57520SJan Höppner * 27968fd57520SJan Höppner * If a mismatch occurs, the corresponding error bit is set, as well as 27978fd57520SJan Höppner * additional information, depending on the error. 27988fd57520SJan Höppner */ 27998fd57520SJan Höppner static void dasd_eckd_format_evaluate_tracks(struct eckd_count *fmt_buffer, 28008fd57520SJan Höppner struct format_check_t *cdata, 28018fd57520SJan Höppner int rpt_max, int rpt_exp, 28028fd57520SJan Höppner int trk_per_cyl, int tpm) 28038fd57520SJan Höppner { 28048fd57520SJan Höppner struct ch_t geo; 28058fd57520SJan Höppner int max_entries; 28068fd57520SJan Höppner int count = 0; 28078fd57520SJan Höppner int trkcount; 28088fd57520SJan Höppner int blksize; 28098fd57520SJan Höppner int pos = 0; 28108fd57520SJan Höppner int i, j; 28118fd57520SJan Höppner int kl; 28128fd57520SJan Höppner 28138fd57520SJan Höppner trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; 28148fd57520SJan Höppner max_entries = trkcount * rpt_max; 28158fd57520SJan Höppner 28168fd57520SJan Höppner for (i = cdata->expect.start_unit; i <= cdata->expect.stop_unit; i++) { 28178fd57520SJan Höppner /* Calculate the correct next starting position in the buffer */ 28188fd57520SJan Höppner if (tpm) { 28198fd57520SJan Höppner while (fmt_buffer[pos].record == 0 && 28208fd57520SJan Höppner fmt_buffer[pos].dl == 0) { 28218fd57520SJan Höppner if (pos++ > max_entries) 28228fd57520SJan Höppner break; 28238fd57520SJan Höppner } 28248fd57520SJan Höppner } else { 28258fd57520SJan Höppner if (i != cdata->expect.start_unit) 28268fd57520SJan Höppner pos += rpt_max - count; 28278fd57520SJan Höppner } 28288fd57520SJan Höppner 28298fd57520SJan Höppner /* Calculate the expected geo values for the current track */ 28308fd57520SJan Höppner set_ch_t(&geo, i / trk_per_cyl, i % trk_per_cyl); 28318fd57520SJan Höppner 28328fd57520SJan Höppner /* Count and check number of records */ 28338fd57520SJan Höppner count = dasd_eckd_count_records(fmt_buffer, pos, pos + rpt_max); 28348fd57520SJan Höppner 28358fd57520SJan Höppner if (count < rpt_exp) { 28368fd57520SJan Höppner cdata->result = DASD_FMT_ERR_TOO_FEW_RECORDS; 28378fd57520SJan Höppner break; 28388fd57520SJan Höppner } 28398fd57520SJan Höppner if (count > rpt_exp) { 28408fd57520SJan Höppner cdata->result = DASD_FMT_ERR_TOO_MANY_RECORDS; 28418fd57520SJan Höppner break; 28428fd57520SJan Höppner } 28438fd57520SJan Höppner 28448fd57520SJan Höppner for (j = 0; j < count; j++, pos++) { 28458fd57520SJan Höppner blksize = cdata->expect.blksize; 28468fd57520SJan Höppner kl = 0; 28478fd57520SJan Höppner 28488fd57520SJan Höppner /* 28498fd57520SJan Höppner * Set special values when checking CDL formatted 28508fd57520SJan Höppner * devices. 28518fd57520SJan Höppner */ 28528fd57520SJan Höppner if ((cdata->expect.intensity & 0x08) && 28538fd57520SJan Höppner geo.cyl == 0 && geo.head == 0) { 28548fd57520SJan Höppner if (j < 3) { 28558fd57520SJan Höppner blksize = sizes_trk0[j] - 4; 28568fd57520SJan Höppner kl = 4; 28578fd57520SJan Höppner } 28588fd57520SJan Höppner } 28598fd57520SJan Höppner if ((cdata->expect.intensity & 0x08) && 28608fd57520SJan Höppner geo.cyl == 0 && geo.head == 1) { 28618fd57520SJan Höppner blksize = LABEL_SIZE - 44; 28628fd57520SJan Höppner kl = 44; 28638fd57520SJan Höppner } 28648fd57520SJan Höppner 28658fd57520SJan Höppner /* Check blocksize */ 28668fd57520SJan Höppner if (fmt_buffer[pos].dl != blksize) { 28678fd57520SJan Höppner cdata->result = DASD_FMT_ERR_BLKSIZE; 28688fd57520SJan Höppner goto out; 28698fd57520SJan Höppner } 28708fd57520SJan Höppner /* Check if key length is 0 */ 28718fd57520SJan Höppner if (fmt_buffer[pos].kl != kl) { 28728fd57520SJan Höppner cdata->result = DASD_FMT_ERR_KEY_LENGTH; 28738fd57520SJan Höppner goto out; 28748fd57520SJan Höppner } 28758fd57520SJan Höppner /* Check if record_id is correct */ 28768fd57520SJan Höppner if (fmt_buffer[pos].cyl != geo.cyl || 28778fd57520SJan Höppner fmt_buffer[pos].head != geo.head || 28788fd57520SJan Höppner fmt_buffer[pos].record != (j + 1)) { 28798fd57520SJan Höppner cdata->result = DASD_FMT_ERR_RECORD_ID; 28808fd57520SJan Höppner goto out; 28818fd57520SJan Höppner } 28828fd57520SJan Höppner } 28838fd57520SJan Höppner } 28848fd57520SJan Höppner 28858fd57520SJan Höppner out: 28868fd57520SJan Höppner /* 28878fd57520SJan Höppner * In case of no errors, we need to decrease by one 28888fd57520SJan Höppner * to get the correct positions. 28898fd57520SJan Höppner */ 28908fd57520SJan Höppner if (!cdata->result) { 28918fd57520SJan Höppner i--; 28928fd57520SJan Höppner pos--; 28938fd57520SJan Höppner } 28948fd57520SJan Höppner 28958fd57520SJan Höppner cdata->unit = i; 28968fd57520SJan Höppner cdata->num_records = count; 28978fd57520SJan Höppner cdata->rec = fmt_buffer[pos].record; 28988fd57520SJan Höppner cdata->blksize = fmt_buffer[pos].dl; 28998fd57520SJan Höppner cdata->key_length = fmt_buffer[pos].kl; 29008fd57520SJan Höppner } 29018fd57520SJan Höppner 29028fd57520SJan Höppner /* 29038fd57520SJan Höppner * Check the format of a range of tracks of a DASD. 29048fd57520SJan Höppner */ 29058fd57520SJan Höppner static int dasd_eckd_check_device_format(struct dasd_device *base, 29068fd57520SJan Höppner struct format_check_t *cdata, 29078fd57520SJan Höppner int enable_pav) 29088fd57520SJan Höppner { 29098fd57520SJan Höppner struct dasd_eckd_private *private = base->private; 29108fd57520SJan Höppner struct eckd_count *fmt_buffer; 29118fd57520SJan Höppner struct irb irb; 29128fd57520SJan Höppner int rpt_max, rpt_exp; 29138fd57520SJan Höppner int fmt_buffer_size; 29148fd57520SJan Höppner int trk_per_cyl; 29158fd57520SJan Höppner int trkcount; 29168fd57520SJan Höppner int tpm = 0; 29178fd57520SJan Höppner int rc; 29188fd57520SJan Höppner 29198fd57520SJan Höppner trk_per_cyl = private->rdc_data.trk_per_cyl; 29208fd57520SJan Höppner 29218fd57520SJan Höppner /* Get maximum and expected amount of records per track */ 29228fd57520SJan Höppner rpt_max = recs_per_track(&private->rdc_data, 0, 512) + 1; 29238fd57520SJan Höppner rpt_exp = recs_per_track(&private->rdc_data, 0, cdata->expect.blksize); 29248fd57520SJan Höppner 29258fd57520SJan Höppner trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; 29268fd57520SJan Höppner fmt_buffer_size = trkcount * rpt_max * sizeof(struct eckd_count); 29278fd57520SJan Höppner 29288fd57520SJan Höppner fmt_buffer = kzalloc(fmt_buffer_size, GFP_KERNEL | GFP_DMA); 29298fd57520SJan Höppner if (!fmt_buffer) 29308fd57520SJan Höppner return -ENOMEM; 29318fd57520SJan Höppner 29328fd57520SJan Höppner /* 29338fd57520SJan Höppner * A certain FICON feature subset is needed to operate in transport 29348fd57520SJan Höppner * mode. Additionally, the support for transport mode is implicitly 29358fd57520SJan Höppner * checked by comparing the buffer size with fcx_max_data. As long as 29368fd57520SJan Höppner * the buffer size is smaller we can operate in transport mode and 29378fd57520SJan Höppner * process multiple tracks. If not, only one track at once is being 29388fd57520SJan Höppner * processed using command mode. 29398fd57520SJan Höppner */ 29408fd57520SJan Höppner if ((private->features.feature[40] & 0x04) && 29418fd57520SJan Höppner fmt_buffer_size <= private->fcx_max_data) 29428fd57520SJan Höppner tpm = 1; 29438fd57520SJan Höppner 29448fd57520SJan Höppner rc = dasd_eckd_format_process_data(base, &cdata->expect, enable_pav, 29458fd57520SJan Höppner tpm, fmt_buffer, rpt_max, &irb); 29468fd57520SJan Höppner if (rc && rc != -EIO) 29478fd57520SJan Höppner goto out; 29488fd57520SJan Höppner if (rc == -EIO) { 29498fd57520SJan Höppner /* 29508fd57520SJan Höppner * If our first attempt with transport mode enabled comes back 29518fd57520SJan Höppner * with an incorrect length error, we're going to retry the 29528fd57520SJan Höppner * check with command mode. 29538fd57520SJan Höppner */ 29548fd57520SJan Höppner if (tpm && scsw_cstat(&irb.scsw) == 0x40) { 29558fd57520SJan Höppner tpm = 0; 29568fd57520SJan Höppner rc = dasd_eckd_format_process_data(base, &cdata->expect, 29578fd57520SJan Höppner enable_pav, tpm, 29588fd57520SJan Höppner fmt_buffer, rpt_max, 29598fd57520SJan Höppner &irb); 29608fd57520SJan Höppner if (rc) 29618fd57520SJan Höppner goto out; 29628fd57520SJan Höppner } else { 29638fd57520SJan Höppner goto out; 29648fd57520SJan Höppner } 29658fd57520SJan Höppner } 29668fd57520SJan Höppner 29678fd57520SJan Höppner dasd_eckd_format_evaluate_tracks(fmt_buffer, cdata, rpt_max, rpt_exp, 29688fd57520SJan Höppner trk_per_cyl, tpm); 29698fd57520SJan Höppner 29708fd57520SJan Höppner out: 29718fd57520SJan Höppner kfree(fmt_buffer); 29728fd57520SJan Höppner 29738fd57520SJan Höppner return rc; 2974570d237cSJan Höppner } 2975570d237cSJan Höppner 29768e09f215SStefan Weinhuber static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 29771da177e4SLinus Torvalds { 2978a2ace466SHannes Reinecke if (cqr->retries < 0) { 2979a2ace466SHannes Reinecke cqr->status = DASD_CQR_FAILED; 2980a2ace466SHannes Reinecke return; 2981a2ace466SHannes Reinecke } 29828e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 29838e09f215SStefan Weinhuber if (cqr->block && (cqr->startdev != cqr->block->base)) { 29848e09f215SStefan Weinhuber dasd_eckd_reset_ccw_to_base_io(cqr); 29858e09f215SStefan Weinhuber cqr->startdev = cqr->block->base; 2986c9346151SStefan Haberland cqr->lpm = dasd_path_get_opm(cqr->block->base); 29871da177e4SLinus Torvalds } 29888e09f215SStefan Weinhuber }; 29891da177e4SLinus Torvalds 29901da177e4SLinus Torvalds static dasd_erp_fn_t 29911da177e4SLinus Torvalds dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 29921da177e4SLinus Torvalds { 29938e09f215SStefan Weinhuber struct dasd_device *device = (struct dasd_device *) cqr->startdev; 29941da177e4SLinus Torvalds struct ccw_device *cdev = device->cdev; 29951da177e4SLinus Torvalds 29961da177e4SLinus Torvalds switch (cdev->id.cu_type) { 29971da177e4SLinus Torvalds case 0x3990: 29981da177e4SLinus Torvalds case 0x2105: 29991da177e4SLinus Torvalds case 0x2107: 30001da177e4SLinus Torvalds case 0x1750: 30011da177e4SLinus Torvalds return dasd_3990_erp_action; 30021da177e4SLinus Torvalds case 0x9343: 30031da177e4SLinus Torvalds case 0x3880: 30041da177e4SLinus Torvalds default: 30051da177e4SLinus Torvalds return dasd_default_erp_action; 30061da177e4SLinus Torvalds } 30071da177e4SLinus Torvalds } 30081da177e4SLinus Torvalds 30091da177e4SLinus Torvalds static dasd_erp_fn_t 30101da177e4SLinus Torvalds dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 30111da177e4SLinus Torvalds { 30121da177e4SLinus Torvalds return dasd_default_erp_postaction; 30131da177e4SLinus Torvalds } 30141da177e4SLinus Torvalds 30155a27e60dSStefan Weinhuber static void dasd_eckd_check_for_device_change(struct dasd_device *device, 30165a27e60dSStefan Weinhuber struct dasd_ccw_req *cqr, 30178e09f215SStefan Weinhuber struct irb *irb) 30188e09f215SStefan Weinhuber { 30198e09f215SStefan Weinhuber char mask; 3020f3eb5384SStefan Weinhuber char *sense = NULL; 3021543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 30228e09f215SStefan Weinhuber 30238e09f215SStefan Weinhuber /* first of all check for state change pending interrupt */ 30248e09f215SStefan Weinhuber mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 3025f3eb5384SStefan Weinhuber if ((scsw_dstat(&irb->scsw) & mask) == mask) { 3026c8d1c0ffSStefan Haberland /* 3027c8d1c0ffSStefan Haberland * for alias only, not in offline processing 3028c8d1c0ffSStefan Haberland * and only if not suspended 3029c8d1c0ffSStefan Haberland */ 3030501183f2SStefan Haberland if (!device->block && private->lcu && 303125e2cf1cSStefan Haberland device->state == DASD_STATE_ONLINE && 3032c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_OFFLINE, &device->flags) && 3033c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 3034501183f2SStefan Haberland /* schedule worker to reload device */ 3035501183f2SStefan Haberland dasd_reload_device(device); 3036501183f2SStefan Haberland } 30378e09f215SStefan Weinhuber dasd_generic_handle_state_change(device); 30388e09f215SStefan Weinhuber return; 30398e09f215SStefan Weinhuber } 30408e09f215SStefan Weinhuber 3041a5a0061fSStefan Weinhuber sense = dasd_get_sense(irb); 30425a27e60dSStefan Weinhuber if (!sense) 30435a27e60dSStefan Weinhuber return; 30445a27e60dSStefan Weinhuber 30455a27e60dSStefan Weinhuber /* summary unit check */ 3046c7a29e56SStefan Weinhuber if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) && 3047a5a0061fSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { 304859a9ed5fSStefan Haberland if (test_and_set_bit(DASD_FLAG_SUC, &device->flags)) { 304959a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 305059a9ed5fSStefan Haberland "eckd suc: device already notified"); 305159a9ed5fSStefan Haberland return; 305259a9ed5fSStefan Haberland } 305359a9ed5fSStefan Haberland sense = dasd_get_sense(irb); 305459a9ed5fSStefan Haberland if (!sense) { 305559a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 305659a9ed5fSStefan Haberland "eckd suc: no reason code available"); 305759a9ed5fSStefan Haberland clear_bit(DASD_FLAG_SUC, &device->flags); 305859a9ed5fSStefan Haberland return; 305959a9ed5fSStefan Haberland 306059a9ed5fSStefan Haberland } 306159a9ed5fSStefan Haberland private->suc_reason = sense[8]; 306259a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_NOTICE, device, "%s %x", 306359a9ed5fSStefan Haberland "eckd handle summary unit check: reason", 306459a9ed5fSStefan Haberland private->suc_reason); 306559a9ed5fSStefan Haberland dasd_get_device(device); 306659a9ed5fSStefan Haberland if (!schedule_work(&device->suc_work)) 306759a9ed5fSStefan Haberland dasd_put_device(device); 306859a9ed5fSStefan Haberland 30698e09f215SStefan Weinhuber return; 30708e09f215SStefan Weinhuber } 30718e09f215SStefan Weinhuber 3072f60c768cSStefan Haberland /* service information message SIM */ 30735a27e60dSStefan Weinhuber if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && 3074f3eb5384SStefan Weinhuber ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 3075f3eb5384SStefan Weinhuber dasd_3990_erp_handle_sim(device, sense); 3076f60c768cSStefan Haberland return; 3077f60c768cSStefan Haberland } 3078f60c768cSStefan Haberland 30795a27e60dSStefan Weinhuber /* loss of device reservation is handled via base devices only 30805a27e60dSStefan Weinhuber * as alias devices may be used with several bases 30815a27e60dSStefan Weinhuber */ 3082c7a29e56SStefan Weinhuber if (device->block && (sense[27] & DASD_SENSE_BIT_0) && 3083c7a29e56SStefan Weinhuber (sense[7] == 0x3F) && 30845a27e60dSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && 30855a27e60dSStefan Weinhuber test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { 30865a27e60dSStefan Weinhuber if (device->features & DASD_FEATURE_FAILONSLCK) 30875a27e60dSStefan Weinhuber set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); 30885a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 30895a27e60dSStefan Weinhuber dev_err(&device->cdev->dev, 30905a27e60dSStefan Weinhuber "The device reservation was lost\n"); 3091ada3df91SStefan Haberland } 30925a27e60dSStefan Weinhuber } 3093f3eb5384SStefan Weinhuber 3094f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( 3095f3eb5384SStefan Weinhuber struct dasd_device *startdev, 30968e09f215SStefan Weinhuber struct dasd_block *block, 3097f3eb5384SStefan Weinhuber struct request *req, 3098f3eb5384SStefan Weinhuber sector_t first_rec, 3099f3eb5384SStefan Weinhuber sector_t last_rec, 3100f3eb5384SStefan Weinhuber sector_t first_trk, 3101f3eb5384SStefan Weinhuber sector_t last_trk, 3102f3eb5384SStefan Weinhuber unsigned int first_offs, 3103f3eb5384SStefan Weinhuber unsigned int last_offs, 3104f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 3105f3eb5384SStefan Weinhuber unsigned int blksize) 31061da177e4SLinus Torvalds { 31071da177e4SLinus Torvalds struct dasd_eckd_private *private; 31081da177e4SLinus Torvalds unsigned long *idaws; 31091da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 31101da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 31111da177e4SLinus Torvalds struct ccw1 *ccw; 31125705f702SNeilBrown struct req_iterator iter; 31137988613bSKent Overstreet struct bio_vec bv; 31141da177e4SLinus Torvalds char *dst; 3115f3eb5384SStefan Weinhuber unsigned int off; 31161da177e4SLinus Torvalds int count, cidaw, cplength, datasize; 3117f3eb5384SStefan Weinhuber sector_t recid; 31181da177e4SLinus Torvalds unsigned char cmd, rcmd; 31198e09f215SStefan Weinhuber int use_prefix; 31208e09f215SStefan Weinhuber struct dasd_device *basedev; 31211da177e4SLinus Torvalds 31228e09f215SStefan Weinhuber basedev = block->base; 3123543691a4SSebastian Ott private = basedev->private; 31241da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 31251da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_READ_MT; 31261da177e4SLinus Torvalds else if (rq_data_dir(req) == WRITE) 31271da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_WRITE_MT; 31281da177e4SLinus Torvalds else 31291da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 3130f3eb5384SStefan Weinhuber 31311da177e4SLinus Torvalds /* Check struct bio and count the number of blocks for the request. */ 31321da177e4SLinus Torvalds count = 0; 31331da177e4SLinus Torvalds cidaw = 0; 31345705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 31357988613bSKent Overstreet if (bv.bv_len & (blksize - 1)) 31361da177e4SLinus Torvalds /* Eckd can only do full blocks. */ 31371da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 31387988613bSKent Overstreet count += bv.bv_len >> (block->s2b_shift + 9); 31397988613bSKent Overstreet if (idal_is_needed (page_address(bv.bv_page), bv.bv_len)) 31407988613bSKent Overstreet cidaw += bv.bv_len >> (block->s2b_shift + 9); 31411da177e4SLinus Torvalds } 31421da177e4SLinus Torvalds /* Paranoia. */ 31431da177e4SLinus Torvalds if (count != last_rec - first_rec + 1) 31441da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 31458e09f215SStefan Weinhuber 31468e09f215SStefan Weinhuber /* use the prefix command if available */ 31478e09f215SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 31488e09f215SStefan Weinhuber if (use_prefix) { 31498e09f215SStefan Weinhuber /* 1x prefix + number of blocks */ 31508e09f215SStefan Weinhuber cplength = 2 + count; 31518e09f215SStefan Weinhuber /* 1x prefix + cidaws*sizeof(long) */ 31528e09f215SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 31538e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 31548e09f215SStefan Weinhuber cidaw * sizeof(unsigned long); 31558e09f215SStefan Weinhuber } else { 31561da177e4SLinus Torvalds /* 1x define extent + 1x locate record + number of blocks */ 31571da177e4SLinus Torvalds cplength = 2 + count; 31581da177e4SLinus Torvalds /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 31598e09f215SStefan Weinhuber datasize = sizeof(struct DE_eckd_data) + 31608e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 31611da177e4SLinus Torvalds cidaw * sizeof(unsigned long); 31628e09f215SStefan Weinhuber } 31631da177e4SLinus Torvalds /* Find out the number of additional locate record ccws for cdl. */ 31641da177e4SLinus Torvalds if (private->uses_cdl && first_rec < 2*blk_per_trk) { 31651da177e4SLinus Torvalds if (last_rec >= 2*blk_per_trk) 31661da177e4SLinus Torvalds count = 2*blk_per_trk - first_rec; 31671da177e4SLinus Torvalds cplength += count; 31681da177e4SLinus Torvalds datasize += count*sizeof(struct LO_eckd_data); 31691da177e4SLinus Torvalds } 31701da177e4SLinus Torvalds /* Allocate the ccw request. */ 317168b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 317268b781feSStefan Haberland startdev); 31731da177e4SLinus Torvalds if (IS_ERR(cqr)) 31741da177e4SLinus Torvalds return cqr; 31751da177e4SLinus Torvalds ccw = cqr->cpaddr; 31768e09f215SStefan Weinhuber /* First ccw is define extent or prefix. */ 31778e09f215SStefan Weinhuber if (use_prefix) { 31788e09f215SStefan Weinhuber if (prefix(ccw++, cqr->data, first_trk, 31798e09f215SStefan Weinhuber last_trk, cmd, basedev, startdev) == -EAGAIN) { 31808e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 31818e09f215SStefan Weinhuber * Try again later. 31828e09f215SStefan Weinhuber */ 31838e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 3184d54853efSMartin Schwidefsky return ERR_PTR(-EAGAIN); 3185d54853efSMartin Schwidefsky } 31868e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 31878e09f215SStefan Weinhuber sizeof(struct PFX_eckd_data)); 31888e09f215SStefan Weinhuber } else { 31898e09f215SStefan Weinhuber if (define_extent(ccw++, cqr->data, first_trk, 3190b38f27e8SStefan Haberland last_trk, cmd, basedev) == -EAGAIN) { 31918e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 31928e09f215SStefan Weinhuber * Try again later. 31938e09f215SStefan Weinhuber */ 31948e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 31958e09f215SStefan Weinhuber return ERR_PTR(-EAGAIN); 31968e09f215SStefan Weinhuber } 31978e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 31988e09f215SStefan Weinhuber sizeof(struct DE_eckd_data)); 31998e09f215SStefan Weinhuber } 32001da177e4SLinus Torvalds /* Build locate_record+read/write/ccws. */ 32011da177e4SLinus Torvalds LO_data = (struct LO_eckd_data *) (idaws + cidaw); 32021da177e4SLinus Torvalds recid = first_rec; 32031da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 32041da177e4SLinus Torvalds /* Only standard blocks so there is just one locate record. */ 32051da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 32061da177e4SLinus Torvalds locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 32078e09f215SStefan Weinhuber last_rec - recid + 1, cmd, basedev, blksize); 32081da177e4SLinus Torvalds } 32095705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 32107988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 32111da177e4SLinus Torvalds if (dasd_page_cache) { 32121da177e4SLinus Torvalds char *copy = kmem_cache_alloc(dasd_page_cache, 3213441e143eSChristoph Lameter GFP_DMA | __GFP_NOWARN); 32141da177e4SLinus Torvalds if (copy && rq_data_dir(req) == WRITE) 32157988613bSKent Overstreet memcpy(copy + bv.bv_offset, dst, bv.bv_len); 32161da177e4SLinus Torvalds if (copy) 32177988613bSKent Overstreet dst = copy + bv.bv_offset; 32181da177e4SLinus Torvalds } 32197988613bSKent Overstreet for (off = 0; off < bv.bv_len; off += blksize) { 32201da177e4SLinus Torvalds sector_t trkid = recid; 32211da177e4SLinus Torvalds unsigned int recoffs = sector_div(trkid, blk_per_trk); 32221da177e4SLinus Torvalds rcmd = cmd; 32231da177e4SLinus Torvalds count = blksize; 32241da177e4SLinus Torvalds /* Locate record for cdl special block ? */ 32251da177e4SLinus Torvalds if (private->uses_cdl && recid < 2*blk_per_trk) { 32261da177e4SLinus Torvalds if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 32271da177e4SLinus Torvalds rcmd |= 0x8; 32281da177e4SLinus Torvalds count = dasd_eckd_cdl_reclen(recid); 3229ec5883abSHorst Hummel if (count < blksize && 3230ec5883abSHorst Hummel rq_data_dir(req) == READ) 32311da177e4SLinus Torvalds memset(dst + count, 0xe5, 32321da177e4SLinus Torvalds blksize - count); 32331da177e4SLinus Torvalds } 32341da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 32351da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 32361da177e4SLinus Torvalds trkid, recoffs + 1, 32378e09f215SStefan Weinhuber 1, rcmd, basedev, count); 32381da177e4SLinus Torvalds } 32391da177e4SLinus Torvalds /* Locate record for standard blocks ? */ 32401da177e4SLinus Torvalds if (private->uses_cdl && recid == 2*blk_per_trk) { 32411da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 32421da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 32431da177e4SLinus Torvalds trkid, recoffs + 1, 32441da177e4SLinus Torvalds last_rec - recid + 1, 32458e09f215SStefan Weinhuber cmd, basedev, count); 32461da177e4SLinus Torvalds } 32471da177e4SLinus Torvalds /* Read/write ccw. */ 32481da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 32491da177e4SLinus Torvalds ccw->cmd_code = rcmd; 32501da177e4SLinus Torvalds ccw->count = count; 32511da177e4SLinus Torvalds if (idal_is_needed(dst, blksize)) { 32521da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) idaws; 32531da177e4SLinus Torvalds ccw->flags = CCW_FLAG_IDA; 32541da177e4SLinus Torvalds idaws = idal_create_words(idaws, dst, blksize); 32551da177e4SLinus Torvalds } else { 32561da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) dst; 32571da177e4SLinus Torvalds ccw->flags = 0; 32581da177e4SLinus Torvalds } 32591da177e4SLinus Torvalds ccw++; 32601da177e4SLinus Torvalds dst += blksize; 32611da177e4SLinus Torvalds recid++; 32621da177e4SLinus Torvalds } 32631da177e4SLinus Torvalds } 326413de227bSHolger Smolinski if (blk_noretry_request(req) || 326513de227bSHolger Smolinski block->base->features & DASD_FEATURE_FAILFAST) 32661c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 32678e09f215SStefan Weinhuber cqr->startdev = startdev; 32688e09f215SStefan Weinhuber cqr->memdev = startdev; 32698e09f215SStefan Weinhuber cqr->block = block; 32707c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 3271c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 32721f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 32731aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 32741da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 32751da177e4SLinus Torvalds return cqr; 32761da177e4SLinus Torvalds } 32771da177e4SLinus Torvalds 3278f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 3279f3eb5384SStefan Weinhuber struct dasd_device *startdev, 3280f3eb5384SStefan Weinhuber struct dasd_block *block, 3281f3eb5384SStefan Weinhuber struct request *req, 3282f3eb5384SStefan Weinhuber sector_t first_rec, 3283f3eb5384SStefan Weinhuber sector_t last_rec, 3284f3eb5384SStefan Weinhuber sector_t first_trk, 3285f3eb5384SStefan Weinhuber sector_t last_trk, 3286f3eb5384SStefan Weinhuber unsigned int first_offs, 3287f3eb5384SStefan Weinhuber unsigned int last_offs, 3288f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 3289f3eb5384SStefan Weinhuber unsigned int blksize) 3290f3eb5384SStefan Weinhuber { 3291f3eb5384SStefan Weinhuber unsigned long *idaws; 3292f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 3293f3eb5384SStefan Weinhuber struct ccw1 *ccw; 3294f3eb5384SStefan Weinhuber struct req_iterator iter; 32957988613bSKent Overstreet struct bio_vec bv; 3296f3eb5384SStefan Weinhuber char *dst, *idaw_dst; 3297f3eb5384SStefan Weinhuber unsigned int cidaw, cplength, datasize; 3298f3eb5384SStefan Weinhuber unsigned int tlf; 3299f3eb5384SStefan Weinhuber sector_t recid; 3300f3eb5384SStefan Weinhuber unsigned char cmd; 3301f3eb5384SStefan Weinhuber struct dasd_device *basedev; 3302f3eb5384SStefan Weinhuber unsigned int trkcount, count, count_to_trk_end; 3303f3eb5384SStefan Weinhuber unsigned int idaw_len, seg_len, part_len, len_to_track_end; 3304f3eb5384SStefan Weinhuber unsigned char new_track, end_idaw; 3305f3eb5384SStefan Weinhuber sector_t trkid; 3306f3eb5384SStefan Weinhuber unsigned int recoffs; 3307f3eb5384SStefan Weinhuber 3308f3eb5384SStefan Weinhuber basedev = block->base; 3309f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) 3310f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 3311f3eb5384SStefan Weinhuber else if (rq_data_dir(req) == WRITE) 3312f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 3313f3eb5384SStefan Weinhuber else 3314f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 3315f3eb5384SStefan Weinhuber 3316f3eb5384SStefan Weinhuber /* Track based I/O needs IDAWs for each page, and not just for 3317f3eb5384SStefan Weinhuber * 64 bit addresses. We need additional idals for pages 3318f3eb5384SStefan Weinhuber * that get filled from two tracks, so we use the number 3319f3eb5384SStefan Weinhuber * of records as upper limit. 3320f3eb5384SStefan Weinhuber */ 3321f3eb5384SStefan Weinhuber cidaw = last_rec - first_rec + 1; 3322f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 3323f3eb5384SStefan Weinhuber 3324f3eb5384SStefan Weinhuber /* 1x prefix + one read/write ccw per track */ 3325f3eb5384SStefan Weinhuber cplength = 1 + trkcount; 3326f3eb5384SStefan Weinhuber 3327f3eb5384SStefan Weinhuber /* on 31-bit we need space for two 32 bit addresses per page 3328f3eb5384SStefan Weinhuber * on 64-bit one 64 bit address 3329f3eb5384SStefan Weinhuber */ 3330f3eb5384SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 3331f3eb5384SStefan Weinhuber cidaw * sizeof(unsigned long long); 3332f3eb5384SStefan Weinhuber 3333f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 333468b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 333568b781feSStefan Haberland startdev); 3336f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 3337f3eb5384SStefan Weinhuber return cqr; 3338f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 3339f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 3340f3eb5384SStefan Weinhuber if (first_trk == last_trk) 3341f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 3342f3eb5384SStefan Weinhuber else 3343f3eb5384SStefan Weinhuber tlf = last_offs + 1; 3344f3eb5384SStefan Weinhuber tlf *= blksize; 3345f3eb5384SStefan Weinhuber 3346f3eb5384SStefan Weinhuber if (prefix_LRE(ccw++, cqr->data, first_trk, 3347f3eb5384SStefan Weinhuber last_trk, cmd, basedev, startdev, 3348f3eb5384SStefan Weinhuber 1 /* format */, first_offs + 1, 3349f3eb5384SStefan Weinhuber trkcount, blksize, 3350f3eb5384SStefan Weinhuber tlf) == -EAGAIN) { 3351f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 3352f3eb5384SStefan Weinhuber * Try again later. 3353f3eb5384SStefan Weinhuber */ 3354f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 3355f3eb5384SStefan Weinhuber return ERR_PTR(-EAGAIN); 3356f3eb5384SStefan Weinhuber } 3357f3eb5384SStefan Weinhuber 3358f3eb5384SStefan Weinhuber /* 3359f3eb5384SStefan Weinhuber * The translation of request into ccw programs must meet the 3360f3eb5384SStefan Weinhuber * following conditions: 3361f3eb5384SStefan Weinhuber * - all idaws but the first and the last must address full pages 3362f3eb5384SStefan Weinhuber * (or 2K blocks on 31-bit) 3363f3eb5384SStefan Weinhuber * - the scope of a ccw and it's idal ends with the track boundaries 3364f3eb5384SStefan Weinhuber */ 3365f3eb5384SStefan Weinhuber idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); 3366f3eb5384SStefan Weinhuber recid = first_rec; 3367f3eb5384SStefan Weinhuber new_track = 1; 3368f3eb5384SStefan Weinhuber end_idaw = 0; 3369f3eb5384SStefan Weinhuber len_to_track_end = 0; 3370246ccea1SMartin Schwidefsky idaw_dst = NULL; 3371f3eb5384SStefan Weinhuber idaw_len = 0; 3372f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 33737988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 33747988613bSKent Overstreet seg_len = bv.bv_len; 3375f3eb5384SStefan Weinhuber while (seg_len) { 3376f3eb5384SStefan Weinhuber if (new_track) { 3377f3eb5384SStefan Weinhuber trkid = recid; 3378f3eb5384SStefan Weinhuber recoffs = sector_div(trkid, blk_per_trk); 3379f3eb5384SStefan Weinhuber count_to_trk_end = blk_per_trk - recoffs; 3380f3eb5384SStefan Weinhuber count = min((last_rec - recid + 1), 3381f3eb5384SStefan Weinhuber (sector_t)count_to_trk_end); 3382f3eb5384SStefan Weinhuber len_to_track_end = count * blksize; 3383f3eb5384SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 3384f3eb5384SStefan Weinhuber ccw->cmd_code = cmd; 3385f3eb5384SStefan Weinhuber ccw->count = len_to_track_end; 3386f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 3387f3eb5384SStefan Weinhuber ccw->flags = CCW_FLAG_IDA; 3388f3eb5384SStefan Weinhuber ccw++; 3389f3eb5384SStefan Weinhuber recid += count; 3390f3eb5384SStefan Weinhuber new_track = 0; 339152db45c3SStefan Weinhuber /* first idaw for a ccw may start anywhere */ 339252db45c3SStefan Weinhuber if (!idaw_dst) 339352db45c3SStefan Weinhuber idaw_dst = dst; 3394f3eb5384SStefan Weinhuber } 339552db45c3SStefan Weinhuber /* If we start a new idaw, we must make sure that it 339652db45c3SStefan Weinhuber * starts on an IDA_BLOCK_SIZE boundary. 3397f3eb5384SStefan Weinhuber * If we continue an idaw, we must make sure that the 3398f3eb5384SStefan Weinhuber * current segment begins where the so far accumulated 3399f3eb5384SStefan Weinhuber * idaw ends 3400f3eb5384SStefan Weinhuber */ 340152db45c3SStefan Weinhuber if (!idaw_dst) { 340252db45c3SStefan Weinhuber if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { 340352db45c3SStefan Weinhuber dasd_sfree_request(cqr, startdev); 340452db45c3SStefan Weinhuber return ERR_PTR(-ERANGE); 340552db45c3SStefan Weinhuber } else 3406f3eb5384SStefan Weinhuber idaw_dst = dst; 340752db45c3SStefan Weinhuber } 3408f3eb5384SStefan Weinhuber if ((idaw_dst + idaw_len) != dst) { 3409f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 3410f3eb5384SStefan Weinhuber return ERR_PTR(-ERANGE); 3411f3eb5384SStefan Weinhuber } 3412f3eb5384SStefan Weinhuber part_len = min(seg_len, len_to_track_end); 3413f3eb5384SStefan Weinhuber seg_len -= part_len; 3414f3eb5384SStefan Weinhuber dst += part_len; 3415f3eb5384SStefan Weinhuber idaw_len += part_len; 3416f3eb5384SStefan Weinhuber len_to_track_end -= part_len; 3417f3eb5384SStefan Weinhuber /* collected memory area ends on an IDA_BLOCK border, 3418f3eb5384SStefan Weinhuber * -> create an idaw 3419f3eb5384SStefan Weinhuber * idal_create_words will handle cases where idaw_len 3420f3eb5384SStefan Weinhuber * is larger then IDA_BLOCK_SIZE 3421f3eb5384SStefan Weinhuber */ 3422f3eb5384SStefan Weinhuber if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) 3423f3eb5384SStefan Weinhuber end_idaw = 1; 3424f3eb5384SStefan Weinhuber /* We also need to end the idaw at track end */ 3425f3eb5384SStefan Weinhuber if (!len_to_track_end) { 3426f3eb5384SStefan Weinhuber new_track = 1; 3427f3eb5384SStefan Weinhuber end_idaw = 1; 3428f3eb5384SStefan Weinhuber } 3429f3eb5384SStefan Weinhuber if (end_idaw) { 3430f3eb5384SStefan Weinhuber idaws = idal_create_words(idaws, idaw_dst, 3431f3eb5384SStefan Weinhuber idaw_len); 3432246ccea1SMartin Schwidefsky idaw_dst = NULL; 3433f3eb5384SStefan Weinhuber idaw_len = 0; 3434f3eb5384SStefan Weinhuber end_idaw = 0; 3435f3eb5384SStefan Weinhuber } 3436f3eb5384SStefan Weinhuber } 3437f3eb5384SStefan Weinhuber } 3438f3eb5384SStefan Weinhuber 3439f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 3440f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 3441f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3442f3eb5384SStefan Weinhuber cqr->startdev = startdev; 3443f3eb5384SStefan Weinhuber cqr->memdev = startdev; 3444f3eb5384SStefan Weinhuber cqr->block = block; 34457c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 3446c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 34471f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 34481aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 3449f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 3450f3eb5384SStefan Weinhuber return cqr; 3451f3eb5384SStefan Weinhuber } 3452f3eb5384SStefan Weinhuber 3453f3eb5384SStefan Weinhuber static int prepare_itcw(struct itcw *itcw, 3454f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 3455f3eb5384SStefan Weinhuber struct dasd_device *basedev, 3456f3eb5384SStefan Weinhuber struct dasd_device *startdev, 3457f3eb5384SStefan Weinhuber unsigned int rec_on_trk, int count, 3458f3eb5384SStefan Weinhuber unsigned int blksize, 3459f3eb5384SStefan Weinhuber unsigned int total_data_size, 3460f3eb5384SStefan Weinhuber unsigned int tlf, 3461f3eb5384SStefan Weinhuber unsigned int blk_per_trk) 3462f3eb5384SStefan Weinhuber { 3463f3eb5384SStefan Weinhuber struct PFX_eckd_data pfxdata; 3464f3eb5384SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 3465f3eb5384SStefan Weinhuber struct DE_eckd_data *dedata; 3466f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 3467f3eb5384SStefan Weinhuber struct dcw *dcw; 3468f3eb5384SStefan Weinhuber 3469f3eb5384SStefan Weinhuber u32 begcyl, endcyl; 3470f3eb5384SStefan Weinhuber u16 heads, beghead, endhead; 3471f3eb5384SStefan Weinhuber u8 pfx_cmd; 3472f3eb5384SStefan Weinhuber 3473f3eb5384SStefan Weinhuber int rc = 0; 3474f3eb5384SStefan Weinhuber int sector = 0; 3475f3eb5384SStefan Weinhuber int dn, d; 3476f3eb5384SStefan Weinhuber 3477f3eb5384SStefan Weinhuber 3478f3eb5384SStefan Weinhuber /* setup prefix data */ 3479543691a4SSebastian Ott basepriv = basedev->private; 3480543691a4SSebastian Ott startpriv = startdev->private; 3481f3eb5384SStefan Weinhuber dedata = &pfxdata.define_extent; 3482f3eb5384SStefan Weinhuber lredata = &pfxdata.locate_record; 3483f3eb5384SStefan Weinhuber 3484f3eb5384SStefan Weinhuber memset(&pfxdata, 0, sizeof(pfxdata)); 3485f3eb5384SStefan Weinhuber pfxdata.format = 1; /* PFX with LRE */ 3486f3eb5384SStefan Weinhuber pfxdata.base_address = basepriv->ned->unit_addr; 3487f3eb5384SStefan Weinhuber pfxdata.base_lss = basepriv->ned->ID; 3488f3eb5384SStefan Weinhuber pfxdata.validity.define_extent = 1; 3489f3eb5384SStefan Weinhuber 3490f3eb5384SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 3491f3eb5384SStefan Weinhuber if (startpriv->uid.type != UA_BASE_DEVICE) { 3492f3eb5384SStefan Weinhuber pfxdata.validity.verify_base = 1; 3493f3eb5384SStefan Weinhuber if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 3494f3eb5384SStefan Weinhuber pfxdata.validity.hyper_pav = 1; 3495f3eb5384SStefan Weinhuber } 3496f3eb5384SStefan Weinhuber 3497f3eb5384SStefan Weinhuber switch (cmd) { 3498f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 3499f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 3500f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 3501f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 3502f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 3503f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 3504f3eb5384SStefan Weinhuber lredata->operation.operation = 0x0C; 3505f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x01; 3506f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX_READ; 3507f3eb5384SStefan Weinhuber break; 3508f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 3509f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 3510f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 3511f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 3512f3eb5384SStefan Weinhuber rc = check_XRC_on_prefix(&pfxdata, basedev); 3513f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 3514f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 3515f3eb5384SStefan Weinhuber lredata->operation.operation = 0x3F; 3516f3eb5384SStefan Weinhuber lredata->extended_operation = 0x23; 3517f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x2; 3518f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX; 3519f3eb5384SStefan Weinhuber break; 35208fd57520SJan Höppner case DASD_ECKD_CCW_READ_COUNT_MT: 35218fd57520SJan Höppner dedata->mask.perm = 0x1; 35228fd57520SJan Höppner dedata->attributes.operation = DASD_BYPASS_CACHE; 35238fd57520SJan Höppner dedata->ga_extended |= 0x42; 35248fd57520SJan Höppner dedata->blk_size = blksize; 35258fd57520SJan Höppner lredata->operation.orientation = 0x2; 35268fd57520SJan Höppner lredata->operation.operation = 0x16; 35278fd57520SJan Höppner lredata->auxiliary.check_bytes = 0x01; 35288fd57520SJan Höppner pfx_cmd = DASD_ECKD_CCW_PFX_READ; 35298fd57520SJan Höppner break; 3530f3eb5384SStefan Weinhuber default: 3531f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 3532f3eb5384SStefan Weinhuber "prepare itcw, unknown opcode 0x%x", cmd); 3533f3eb5384SStefan Weinhuber BUG(); 3534f3eb5384SStefan Weinhuber break; 3535f3eb5384SStefan Weinhuber } 3536f3eb5384SStefan Weinhuber if (rc) 3537f3eb5384SStefan Weinhuber return rc; 3538f3eb5384SStefan Weinhuber 3539f3eb5384SStefan Weinhuber dedata->attributes.mode = 0x3; /* ECKD */ 3540f3eb5384SStefan Weinhuber 3541f3eb5384SStefan Weinhuber heads = basepriv->rdc_data.trk_per_cyl; 3542f3eb5384SStefan Weinhuber begcyl = trk / heads; 3543f3eb5384SStefan Weinhuber beghead = trk % heads; 3544f3eb5384SStefan Weinhuber endcyl = totrk / heads; 3545f3eb5384SStefan Weinhuber endhead = totrk % heads; 3546f3eb5384SStefan Weinhuber 3547f3eb5384SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 3548f3eb5384SStefan Weinhuber if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 3549f3eb5384SStefan Weinhuber dedata->attributes.operation == DASD_SEQ_ACCESS) { 3550f3eb5384SStefan Weinhuber 3551f3eb5384SStefan Weinhuber if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 3552f3eb5384SStefan Weinhuber endcyl += basepriv->attrib.nr_cyl; 3553f3eb5384SStefan Weinhuber else 3554f3eb5384SStefan Weinhuber endcyl = (basepriv->real_cyl - 1); 3555f3eb5384SStefan Weinhuber } 3556f3eb5384SStefan Weinhuber 3557f3eb5384SStefan Weinhuber set_ch_t(&dedata->beg_ext, begcyl, beghead); 3558f3eb5384SStefan Weinhuber set_ch_t(&dedata->end_ext, endcyl, endhead); 3559f3eb5384SStefan Weinhuber 3560f3eb5384SStefan Weinhuber dedata->ep_format = 0x20; /* records per track is valid */ 3561f3eb5384SStefan Weinhuber dedata->ep_rec_per_track = blk_per_trk; 3562f3eb5384SStefan Weinhuber 3563f3eb5384SStefan Weinhuber if (rec_on_trk) { 3564f3eb5384SStefan Weinhuber switch (basepriv->rdc_data.dev_type) { 3565f3eb5384SStefan Weinhuber case 0x3390: 3566f3eb5384SStefan Weinhuber dn = ceil_quot(blksize + 6, 232); 3567f3eb5384SStefan Weinhuber d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); 3568f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 3569f3eb5384SStefan Weinhuber break; 3570f3eb5384SStefan Weinhuber case 0x3380: 3571f3eb5384SStefan Weinhuber d = 7 + ceil_quot(blksize + 12, 32); 3572f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 3573f3eb5384SStefan Weinhuber break; 3574f3eb5384SStefan Weinhuber } 3575f3eb5384SStefan Weinhuber } 3576f3eb5384SStefan Weinhuber 35778fd57520SJan Höppner if (cmd == DASD_ECKD_CCW_READ_COUNT_MT) { 35788fd57520SJan Höppner lredata->auxiliary.length_valid = 0; 35798fd57520SJan Höppner lredata->auxiliary.length_scope = 0; 35808fd57520SJan Höppner lredata->sector = 0xff; 35818fd57520SJan Höppner } else { 3582f3eb5384SStefan Weinhuber lredata->auxiliary.length_valid = 1; 3583f3eb5384SStefan Weinhuber lredata->auxiliary.length_scope = 1; 35848fd57520SJan Höppner lredata->sector = sector; 35858fd57520SJan Höppner } 3586f3eb5384SStefan Weinhuber lredata->auxiliary.imbedded_ccw_valid = 1; 3587f3eb5384SStefan Weinhuber lredata->length = tlf; 3588f3eb5384SStefan Weinhuber lredata->imbedded_ccw = cmd; 3589f3eb5384SStefan Weinhuber lredata->count = count; 3590f3eb5384SStefan Weinhuber set_ch_t(&lredata->seek_addr, begcyl, beghead); 3591f3eb5384SStefan Weinhuber lredata->search_arg.cyl = lredata->seek_addr.cyl; 3592f3eb5384SStefan Weinhuber lredata->search_arg.head = lredata->seek_addr.head; 3593f3eb5384SStefan Weinhuber lredata->search_arg.record = rec_on_trk; 3594f3eb5384SStefan Weinhuber 3595f3eb5384SStefan Weinhuber dcw = itcw_add_dcw(itcw, pfx_cmd, 0, 3596f3eb5384SStefan Weinhuber &pfxdata, sizeof(pfxdata), total_data_size); 359782a7b955SThomas Meyer return PTR_RET(dcw); 3598f3eb5384SStefan Weinhuber } 3599f3eb5384SStefan Weinhuber 3600f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 3601f3eb5384SStefan Weinhuber struct dasd_device *startdev, 3602f3eb5384SStefan Weinhuber struct dasd_block *block, 3603f3eb5384SStefan Weinhuber struct request *req, 3604f3eb5384SStefan Weinhuber sector_t first_rec, 3605f3eb5384SStefan Weinhuber sector_t last_rec, 3606f3eb5384SStefan Weinhuber sector_t first_trk, 3607f3eb5384SStefan Weinhuber sector_t last_trk, 3608f3eb5384SStefan Weinhuber unsigned int first_offs, 3609f3eb5384SStefan Weinhuber unsigned int last_offs, 3610f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 3611f3eb5384SStefan Weinhuber unsigned int blksize) 3612f3eb5384SStefan Weinhuber { 3613f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 3614f3eb5384SStefan Weinhuber struct req_iterator iter; 36157988613bSKent Overstreet struct bio_vec bv; 3616f3eb5384SStefan Weinhuber char *dst; 3617f3eb5384SStefan Weinhuber unsigned int trkcount, ctidaw; 3618f3eb5384SStefan Weinhuber unsigned char cmd; 3619f3eb5384SStefan Weinhuber struct dasd_device *basedev; 3620f3eb5384SStefan Weinhuber unsigned int tlf; 3621f3eb5384SStefan Weinhuber struct itcw *itcw; 3622f3eb5384SStefan Weinhuber struct tidaw *last_tidaw = NULL; 3623f3eb5384SStefan Weinhuber int itcw_op; 3624f3eb5384SStefan Weinhuber size_t itcw_size; 3625ef19298bSStefan Weinhuber u8 tidaw_flags; 3626ef19298bSStefan Weinhuber unsigned int seg_len, part_len, len_to_track_end; 3627ef19298bSStefan Weinhuber unsigned char new_track; 3628ef19298bSStefan Weinhuber sector_t recid, trkid; 3629ef19298bSStefan Weinhuber unsigned int offs; 3630ef19298bSStefan Weinhuber unsigned int count, count_to_trk_end; 3631cd10502bSJulia Lawall int ret; 3632f3eb5384SStefan Weinhuber 3633f3eb5384SStefan Weinhuber basedev = block->base; 3634f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) { 3635f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 3636f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_READ; 3637f3eb5384SStefan Weinhuber } else if (rq_data_dir(req) == WRITE) { 3638f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 3639f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_WRITE; 3640f3eb5384SStefan Weinhuber } else 3641f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 3642f3eb5384SStefan Weinhuber 3643f3eb5384SStefan Weinhuber /* trackbased I/O needs address all memory via TIDAWs, 3644f3eb5384SStefan Weinhuber * not just for 64 bit addresses. This allows us to map 3645f3eb5384SStefan Weinhuber * each segment directly to one tidaw. 3646ef19298bSStefan Weinhuber * In the case of write requests, additional tidaws may 3647ef19298bSStefan Weinhuber * be needed when a segment crosses a track boundary. 3648f3eb5384SStefan Weinhuber */ 3649f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 3650f3eb5384SStefan Weinhuber ctidaw = 0; 3651f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 3652f3eb5384SStefan Weinhuber ++ctidaw; 3653f3eb5384SStefan Weinhuber } 3654ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 3655ef19298bSStefan Weinhuber ctidaw += (last_trk - first_trk); 3656f3eb5384SStefan Weinhuber 3657f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 3658f3eb5384SStefan Weinhuber itcw_size = itcw_calc_size(0, ctidaw, 0); 365968b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 3660f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 3661f3eb5384SStefan Weinhuber return cqr; 3662f3eb5384SStefan Weinhuber 3663f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 3664f3eb5384SStefan Weinhuber if (first_trk == last_trk) 3665f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 3666f3eb5384SStefan Weinhuber else 3667f3eb5384SStefan Weinhuber tlf = last_offs + 1; 3668f3eb5384SStefan Weinhuber tlf *= blksize; 3669f3eb5384SStefan Weinhuber 3670f3eb5384SStefan Weinhuber itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); 3671ef19298bSStefan Weinhuber if (IS_ERR(itcw)) { 3672cd10502bSJulia Lawall ret = -EINVAL; 3673cd10502bSJulia Lawall goto out_error; 3674ef19298bSStefan Weinhuber } 3675f3eb5384SStefan Weinhuber cqr->cpaddr = itcw_get_tcw(itcw); 3676f3eb5384SStefan Weinhuber if (prepare_itcw(itcw, first_trk, last_trk, 3677f3eb5384SStefan Weinhuber cmd, basedev, startdev, 3678f3eb5384SStefan Weinhuber first_offs + 1, 3679f3eb5384SStefan Weinhuber trkcount, blksize, 3680f3eb5384SStefan Weinhuber (last_rec - first_rec + 1) * blksize, 3681f3eb5384SStefan Weinhuber tlf, blk_per_trk) == -EAGAIN) { 3682f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 3683f3eb5384SStefan Weinhuber * Try again later. 3684f3eb5384SStefan Weinhuber */ 3685cd10502bSJulia Lawall ret = -EAGAIN; 3686cd10502bSJulia Lawall goto out_error; 3687f3eb5384SStefan Weinhuber } 3688d54cddb6SHeiko Carstens len_to_track_end = 0; 3689f3eb5384SStefan Weinhuber /* 3690f3eb5384SStefan Weinhuber * A tidaw can address 4k of memory, but must not cross page boundaries 3691f3eb5384SStefan Weinhuber * We can let the block layer handle this by setting 3692f3eb5384SStefan Weinhuber * blk_queue_segment_boundary to page boundaries and 3693f3eb5384SStefan Weinhuber * blk_max_segment_size to page size when setting up the request queue. 3694ef19298bSStefan Weinhuber * For write requests, a TIDAW must not cross track boundaries, because 3695ef19298bSStefan Weinhuber * we have to set the CBC flag on the last tidaw for each track. 3696f3eb5384SStefan Weinhuber */ 3697ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) { 3698ef19298bSStefan Weinhuber new_track = 1; 3699ef19298bSStefan Weinhuber recid = first_rec; 3700f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 37017988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 37027988613bSKent Overstreet seg_len = bv.bv_len; 3703ef19298bSStefan Weinhuber while (seg_len) { 3704ef19298bSStefan Weinhuber if (new_track) { 3705ef19298bSStefan Weinhuber trkid = recid; 3706ef19298bSStefan Weinhuber offs = sector_div(trkid, blk_per_trk); 3707ef19298bSStefan Weinhuber count_to_trk_end = blk_per_trk - offs; 3708ef19298bSStefan Weinhuber count = min((last_rec - recid + 1), 3709ef19298bSStefan Weinhuber (sector_t)count_to_trk_end); 3710ef19298bSStefan Weinhuber len_to_track_end = count * blksize; 3711ef19298bSStefan Weinhuber recid += count; 3712ef19298bSStefan Weinhuber new_track = 0; 3713f3eb5384SStefan Weinhuber } 3714ef19298bSStefan Weinhuber part_len = min(seg_len, len_to_track_end); 3715ef19298bSStefan Weinhuber seg_len -= part_len; 3716ef19298bSStefan Weinhuber len_to_track_end -= part_len; 3717ef19298bSStefan Weinhuber /* We need to end the tidaw at track end */ 3718ef19298bSStefan Weinhuber if (!len_to_track_end) { 3719ef19298bSStefan Weinhuber new_track = 1; 3720ef19298bSStefan Weinhuber tidaw_flags = TIDAW_FLAGS_INSERT_CBC; 3721ef19298bSStefan Weinhuber } else 3722ef19298bSStefan Weinhuber tidaw_flags = 0; 3723ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, 3724ef19298bSStefan Weinhuber dst, part_len); 3725cd10502bSJulia Lawall if (IS_ERR(last_tidaw)) { 3726cd10502bSJulia Lawall ret = -EINVAL; 3727cd10502bSJulia Lawall goto out_error; 3728cd10502bSJulia Lawall } 3729ef19298bSStefan Weinhuber dst += part_len; 3730ef19298bSStefan Weinhuber } 3731ef19298bSStefan Weinhuber } 3732ef19298bSStefan Weinhuber } else { 3733ef19298bSStefan Weinhuber rq_for_each_segment(bv, req, iter) { 37347988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 3735ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, 0x00, 37367988613bSKent Overstreet dst, bv.bv_len); 3737cd10502bSJulia Lawall if (IS_ERR(last_tidaw)) { 3738cd10502bSJulia Lawall ret = -EINVAL; 3739cd10502bSJulia Lawall goto out_error; 3740cd10502bSJulia Lawall } 3741ef19298bSStefan Weinhuber } 3742ef19298bSStefan Weinhuber } 3743ef19298bSStefan Weinhuber last_tidaw->flags |= TIDAW_FLAGS_LAST; 3744ef19298bSStefan Weinhuber last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; 3745f3eb5384SStefan Weinhuber itcw_finalize(itcw); 3746f3eb5384SStefan Weinhuber 3747f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 3748f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 3749f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3750ef19298bSStefan Weinhuber cqr->cpmode = 1; 3751f3eb5384SStefan Weinhuber cqr->startdev = startdev; 3752f3eb5384SStefan Weinhuber cqr->memdev = startdev; 3753f3eb5384SStefan Weinhuber cqr->block = block; 37547c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 3755c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 37561f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 37571aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 3758f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 3759f3eb5384SStefan Weinhuber return cqr; 3760cd10502bSJulia Lawall out_error: 3761cd10502bSJulia Lawall dasd_sfree_request(cqr, startdev); 3762cd10502bSJulia Lawall return ERR_PTR(ret); 3763f3eb5384SStefan Weinhuber } 3764f3eb5384SStefan Weinhuber 3765f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 3766f3eb5384SStefan Weinhuber struct dasd_block *block, 3767f3eb5384SStefan Weinhuber struct request *req) 3768f3eb5384SStefan Weinhuber { 3769ef19298bSStefan Weinhuber int cmdrtd, cmdwtd; 3770f3eb5384SStefan Weinhuber int use_prefix; 3771ef19298bSStefan Weinhuber int fcx_multitrack; 377245b44d76SStefan Weinhuber struct dasd_eckd_private *private; 3773f3eb5384SStefan Weinhuber struct dasd_device *basedev; 3774f3eb5384SStefan Weinhuber sector_t first_rec, last_rec; 3775f3eb5384SStefan Weinhuber sector_t first_trk, last_trk; 3776f3eb5384SStefan Weinhuber unsigned int first_offs, last_offs; 3777f3eb5384SStefan Weinhuber unsigned int blk_per_trk, blksize; 3778f3eb5384SStefan Weinhuber int cdlspecial; 3779ef19298bSStefan Weinhuber unsigned int data_size; 3780f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 3781f3eb5384SStefan Weinhuber 3782f3eb5384SStefan Weinhuber basedev = block->base; 3783543691a4SSebastian Ott private = basedev->private; 3784f3eb5384SStefan Weinhuber 3785f3eb5384SStefan Weinhuber /* Calculate number of blocks/records per track. */ 3786f3eb5384SStefan Weinhuber blksize = block->bp_block; 3787f3eb5384SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 37886fca97a9SStefan Haberland if (blk_per_trk == 0) 37896fca97a9SStefan Haberland return ERR_PTR(-EINVAL); 3790f3eb5384SStefan Weinhuber /* Calculate record id of first and last block. */ 379183096ebfSTejun Heo first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; 3792f3eb5384SStefan Weinhuber first_offs = sector_div(first_trk, blk_per_trk); 3793f3eb5384SStefan Weinhuber last_rec = last_trk = 379483096ebfSTejun Heo (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 3795f3eb5384SStefan Weinhuber last_offs = sector_div(last_trk, blk_per_trk); 3796f3eb5384SStefan Weinhuber cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); 3797f3eb5384SStefan Weinhuber 3798ef19298bSStefan Weinhuber fcx_multitrack = private->features.feature[40] & 0x20; 3799ef19298bSStefan Weinhuber data_size = blk_rq_bytes(req); 380026a35f37SStefan Weinhuber if (data_size % blksize) 380126a35f37SStefan Weinhuber return ERR_PTR(-EINVAL); 3802ef19298bSStefan Weinhuber /* tpm write request add CBC data on each track boundary */ 3803ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 3804ef19298bSStefan Weinhuber data_size += (last_trk - first_trk) * 4; 3805f3eb5384SStefan Weinhuber 3806f3eb5384SStefan Weinhuber /* is read track data and write track data in command mode supported? */ 3807f3eb5384SStefan Weinhuber cmdrtd = private->features.feature[9] & 0x20; 3808f3eb5384SStefan Weinhuber cmdwtd = private->features.feature[12] & 0x40; 3809f3eb5384SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 3810f3eb5384SStefan Weinhuber 3811f3eb5384SStefan Weinhuber cqr = NULL; 3812f3eb5384SStefan Weinhuber if (cdlspecial || dasd_page_cache) { 3813f3eb5384SStefan Weinhuber /* do nothing, just fall through to the cmd mode single case */ 3814ef19298bSStefan Weinhuber } else if ((data_size <= private->fcx_max_data) 3815ef19298bSStefan Weinhuber && (fcx_multitrack || (first_trk == last_trk))) { 3816f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, 3817f3eb5384SStefan Weinhuber first_rec, last_rec, 3818f3eb5384SStefan Weinhuber first_trk, last_trk, 3819f3eb5384SStefan Weinhuber first_offs, last_offs, 3820f3eb5384SStefan Weinhuber blk_per_trk, blksize); 3821ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3822ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 3823f3eb5384SStefan Weinhuber cqr = NULL; 3824f3eb5384SStefan Weinhuber } else if (use_prefix && 3825f3eb5384SStefan Weinhuber (((rq_data_dir(req) == READ) && cmdrtd) || 3826f3eb5384SStefan Weinhuber ((rq_data_dir(req) == WRITE) && cmdwtd))) { 3827f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, 3828f3eb5384SStefan Weinhuber first_rec, last_rec, 3829f3eb5384SStefan Weinhuber first_trk, last_trk, 3830f3eb5384SStefan Weinhuber first_offs, last_offs, 3831f3eb5384SStefan Weinhuber blk_per_trk, blksize); 3832ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3833ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 3834f3eb5384SStefan Weinhuber cqr = NULL; 3835f3eb5384SStefan Weinhuber } 3836f3eb5384SStefan Weinhuber if (!cqr) 3837f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, 3838f3eb5384SStefan Weinhuber first_rec, last_rec, 3839f3eb5384SStefan Weinhuber first_trk, last_trk, 3840f3eb5384SStefan Weinhuber first_offs, last_offs, 3841f3eb5384SStefan Weinhuber blk_per_trk, blksize); 3842f3eb5384SStefan Weinhuber return cqr; 3843f3eb5384SStefan Weinhuber } 3844f3eb5384SStefan Weinhuber 3845e4dbb0f2SStefan Haberland static struct dasd_ccw_req *dasd_raw_build_cp(struct dasd_device *startdev, 3846e4dbb0f2SStefan Haberland struct dasd_block *block, 3847e4dbb0f2SStefan Haberland struct request *req) 3848e4dbb0f2SStefan Haberland { 3849e4dbb0f2SStefan Haberland unsigned long *idaws; 3850e4dbb0f2SStefan Haberland struct dasd_device *basedev; 3851e4dbb0f2SStefan Haberland struct dasd_ccw_req *cqr; 3852e4dbb0f2SStefan Haberland struct ccw1 *ccw; 3853e4dbb0f2SStefan Haberland struct req_iterator iter; 38547988613bSKent Overstreet struct bio_vec bv; 3855e4dbb0f2SStefan Haberland char *dst; 3856e4dbb0f2SStefan Haberland unsigned char cmd; 3857e4dbb0f2SStefan Haberland unsigned int trkcount; 3858e4dbb0f2SStefan Haberland unsigned int seg_len, len_to_track_end; 3859e4dbb0f2SStefan Haberland unsigned int first_offs; 3860e4dbb0f2SStefan Haberland unsigned int cidaw, cplength, datasize; 3861558b9ef0SStefan Weinhuber sector_t first_trk, last_trk, sectors; 3862558b9ef0SStefan Weinhuber sector_t start_padding_sectors, end_sector_offset, end_padding_sectors; 3863e4dbb0f2SStefan Haberland unsigned int pfx_datasize; 3864e4dbb0f2SStefan Haberland 3865e4dbb0f2SStefan Haberland /* 3866e4dbb0f2SStefan Haberland * raw track access needs to be mutiple of 64k and on 64k boundary 3867558b9ef0SStefan Weinhuber * For read requests we can fix an incorrect alignment by padding 3868558b9ef0SStefan Weinhuber * the request with dummy pages. 3869e4dbb0f2SStefan Haberland */ 3870558b9ef0SStefan Weinhuber start_padding_sectors = blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK; 3871558b9ef0SStefan Weinhuber end_sector_offset = (blk_rq_pos(req) + blk_rq_sectors(req)) % 3872558b9ef0SStefan Weinhuber DASD_RAW_SECTORS_PER_TRACK; 3873558b9ef0SStefan Weinhuber end_padding_sectors = (DASD_RAW_SECTORS_PER_TRACK - end_sector_offset) % 3874558b9ef0SStefan Weinhuber DASD_RAW_SECTORS_PER_TRACK; 3875558b9ef0SStefan Weinhuber basedev = block->base; 3876558b9ef0SStefan Weinhuber if ((start_padding_sectors || end_padding_sectors) && 3877558b9ef0SStefan Weinhuber (rq_data_dir(req) == WRITE)) { 3878558b9ef0SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 3879558b9ef0SStefan Weinhuber "raw write not track aligned (%lu,%lu) req %p", 3880558b9ef0SStefan Weinhuber start_padding_sectors, end_padding_sectors, req); 3881e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EINVAL); 3882e4dbb0f2SStefan Haberland goto out; 3883e4dbb0f2SStefan Haberland } 3884e4dbb0f2SStefan Haberland 3885e4dbb0f2SStefan Haberland first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; 3886e4dbb0f2SStefan Haberland last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / 3887e4dbb0f2SStefan Haberland DASD_RAW_SECTORS_PER_TRACK; 3888e4dbb0f2SStefan Haberland trkcount = last_trk - first_trk + 1; 3889e4dbb0f2SStefan Haberland first_offs = 0; 3890e4dbb0f2SStefan Haberland 3891e4dbb0f2SStefan Haberland if (rq_data_dir(req) == READ) 3892e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_READ_TRACK; 3893e4dbb0f2SStefan Haberland else if (rq_data_dir(req) == WRITE) 3894e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; 3895e4dbb0f2SStefan Haberland else { 3896e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EINVAL); 3897e4dbb0f2SStefan Haberland goto out; 3898e4dbb0f2SStefan Haberland } 3899e4dbb0f2SStefan Haberland 3900e4dbb0f2SStefan Haberland /* 3901e4dbb0f2SStefan Haberland * Raw track based I/O needs IDAWs for each page, 3902e4dbb0f2SStefan Haberland * and not just for 64 bit addresses. 3903e4dbb0f2SStefan Haberland */ 3904e4dbb0f2SStefan Haberland cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; 3905e4dbb0f2SStefan Haberland 3906e4dbb0f2SStefan Haberland /* 1x prefix + one read/write ccw per track */ 3907e4dbb0f2SStefan Haberland cplength = 1 + trkcount; 3908e4dbb0f2SStefan Haberland 3909e4dbb0f2SStefan Haberland /* 3910e4dbb0f2SStefan Haberland * struct PFX_eckd_data has up to 2 byte as extended parameter 3911e4dbb0f2SStefan Haberland * this is needed for write full track and has to be mentioned 391225985edcSLucas De Marchi * separately 3913e4dbb0f2SStefan Haberland * add 8 instead of 2 to keep 8 byte boundary 3914e4dbb0f2SStefan Haberland */ 3915e4dbb0f2SStefan Haberland pfx_datasize = sizeof(struct PFX_eckd_data) + 8; 3916e4dbb0f2SStefan Haberland 3917e4dbb0f2SStefan Haberland datasize = pfx_datasize + cidaw * sizeof(unsigned long long); 3918e4dbb0f2SStefan Haberland 3919e4dbb0f2SStefan Haberland /* Allocate the ccw request. */ 3920e4dbb0f2SStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 3921e4dbb0f2SStefan Haberland datasize, startdev); 3922e4dbb0f2SStefan Haberland if (IS_ERR(cqr)) 3923e4dbb0f2SStefan Haberland goto out; 3924e4dbb0f2SStefan Haberland ccw = cqr->cpaddr; 3925e4dbb0f2SStefan Haberland 3926e4dbb0f2SStefan Haberland if (prefix_LRE(ccw++, cqr->data, first_trk, last_trk, cmd, 3927e4dbb0f2SStefan Haberland basedev, startdev, 1 /* format */, first_offs + 1, 3928e4dbb0f2SStefan Haberland trkcount, 0, 0) == -EAGAIN) { 3929e4dbb0f2SStefan Haberland /* Clock not in sync and XRC is enabled. 3930e4dbb0f2SStefan Haberland * Try again later. 3931e4dbb0f2SStefan Haberland */ 3932e4dbb0f2SStefan Haberland dasd_sfree_request(cqr, startdev); 3933e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EAGAIN); 3934e4dbb0f2SStefan Haberland goto out; 3935e4dbb0f2SStefan Haberland } 3936e4dbb0f2SStefan Haberland 3937e4dbb0f2SStefan Haberland idaws = (unsigned long *)(cqr->data + pfx_datasize); 3938e4dbb0f2SStefan Haberland len_to_track_end = 0; 3939558b9ef0SStefan Weinhuber if (start_padding_sectors) { 3940558b9ef0SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 3941558b9ef0SStefan Weinhuber ccw->cmd_code = cmd; 3942558b9ef0SStefan Weinhuber /* maximum 3390 track size */ 3943558b9ef0SStefan Weinhuber ccw->count = 57326; 3944558b9ef0SStefan Weinhuber /* 64k map to one track */ 3945558b9ef0SStefan Weinhuber len_to_track_end = 65536 - start_padding_sectors * 512; 3946558b9ef0SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 3947558b9ef0SStefan Weinhuber ccw->flags |= CCW_FLAG_IDA; 3948558b9ef0SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3949558b9ef0SStefan Weinhuber ccw++; 3950558b9ef0SStefan Weinhuber for (sectors = 0; sectors < start_padding_sectors; sectors += 8) 3951558b9ef0SStefan Weinhuber idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 3952558b9ef0SStefan Weinhuber } 3953e4dbb0f2SStefan Haberland rq_for_each_segment(bv, req, iter) { 39547988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 39557988613bSKent Overstreet seg_len = bv.bv_len; 3956558b9ef0SStefan Weinhuber if (cmd == DASD_ECKD_CCW_READ_TRACK) 3957558b9ef0SStefan Weinhuber memset(dst, 0, seg_len); 3958e4dbb0f2SStefan Haberland if (!len_to_track_end) { 3959e4dbb0f2SStefan Haberland ccw[-1].flags |= CCW_FLAG_CC; 3960e4dbb0f2SStefan Haberland ccw->cmd_code = cmd; 3961e4dbb0f2SStefan Haberland /* maximum 3390 track size */ 3962e4dbb0f2SStefan Haberland ccw->count = 57326; 3963e4dbb0f2SStefan Haberland /* 64k map to one track */ 3964e4dbb0f2SStefan Haberland len_to_track_end = 65536; 3965e4dbb0f2SStefan Haberland ccw->cda = (__u32)(addr_t)idaws; 3966e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_IDA; 3967e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 3968e4dbb0f2SStefan Haberland ccw++; 3969e4dbb0f2SStefan Haberland } 3970e4dbb0f2SStefan Haberland len_to_track_end -= seg_len; 3971e4dbb0f2SStefan Haberland idaws = idal_create_words(idaws, dst, seg_len); 3972e4dbb0f2SStefan Haberland } 3973558b9ef0SStefan Weinhuber for (sectors = 0; sectors < end_padding_sectors; sectors += 8) 3974558b9ef0SStefan Weinhuber idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 3975e4dbb0f2SStefan Haberland if (blk_noretry_request(req) || 3976e4dbb0f2SStefan Haberland block->base->features & DASD_FEATURE_FAILFAST) 3977e4dbb0f2SStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3978e4dbb0f2SStefan Haberland cqr->startdev = startdev; 3979e4dbb0f2SStefan Haberland cqr->memdev = startdev; 3980e4dbb0f2SStefan Haberland cqr->block = block; 3981e4dbb0f2SStefan Haberland cqr->expires = startdev->default_expires * HZ; 3982c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 39831f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 39841aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 3985e4dbb0f2SStefan Haberland cqr->status = DASD_CQR_FILLED; 3986e4dbb0f2SStefan Haberland 3987e4dbb0f2SStefan Haberland if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN) 3988e4dbb0f2SStefan Haberland cqr = NULL; 3989e4dbb0f2SStefan Haberland out: 3990e4dbb0f2SStefan Haberland return cqr; 3991e4dbb0f2SStefan Haberland } 3992e4dbb0f2SStefan Haberland 3993e4dbb0f2SStefan Haberland 39941da177e4SLinus Torvalds static int 39951da177e4SLinus Torvalds dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 39961da177e4SLinus Torvalds { 39971da177e4SLinus Torvalds struct dasd_eckd_private *private; 39981da177e4SLinus Torvalds struct ccw1 *ccw; 39995705f702SNeilBrown struct req_iterator iter; 40007988613bSKent Overstreet struct bio_vec bv; 40011da177e4SLinus Torvalds char *dst, *cda; 40021da177e4SLinus Torvalds unsigned int blksize, blk_per_trk, off; 40031da177e4SLinus Torvalds sector_t recid; 40045705f702SNeilBrown int status; 40051da177e4SLinus Torvalds 40061da177e4SLinus Torvalds if (!dasd_page_cache) 40071da177e4SLinus Torvalds goto out; 4008543691a4SSebastian Ott private = cqr->block->base->private; 40098e09f215SStefan Weinhuber blksize = cqr->block->bp_block; 40101da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 401183096ebfSTejun Heo recid = blk_rq_pos(req) >> cqr->block->s2b_shift; 40121da177e4SLinus Torvalds ccw = cqr->cpaddr; 40131da177e4SLinus Torvalds /* Skip over define extent & locate record. */ 40141da177e4SLinus Torvalds ccw++; 40151da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 40161da177e4SLinus Torvalds ccw++; 40175705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 40187988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 40197988613bSKent Overstreet for (off = 0; off < bv.bv_len; off += blksize) { 40201da177e4SLinus Torvalds /* Skip locate record. */ 40211da177e4SLinus Torvalds if (private->uses_cdl && recid <= 2*blk_per_trk) 40221da177e4SLinus Torvalds ccw++; 40231da177e4SLinus Torvalds if (dst) { 40241da177e4SLinus Torvalds if (ccw->flags & CCW_FLAG_IDA) 40251da177e4SLinus Torvalds cda = *((char **)((addr_t) ccw->cda)); 40261da177e4SLinus Torvalds else 40271da177e4SLinus Torvalds cda = (char *)((addr_t) ccw->cda); 40281da177e4SLinus Torvalds if (dst != cda) { 40291da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 40307988613bSKent Overstreet memcpy(dst, cda, bv.bv_len); 40311da177e4SLinus Torvalds kmem_cache_free(dasd_page_cache, 40321da177e4SLinus Torvalds (void *)((addr_t)cda & PAGE_MASK)); 40331da177e4SLinus Torvalds } 40341da177e4SLinus Torvalds dst = NULL; 40351da177e4SLinus Torvalds } 40361da177e4SLinus Torvalds ccw++; 40371da177e4SLinus Torvalds recid++; 40381da177e4SLinus Torvalds } 40391da177e4SLinus Torvalds } 40401da177e4SLinus Torvalds out: 40411da177e4SLinus Torvalds status = cqr->status == DASD_CQR_DONE; 40428e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 40431da177e4SLinus Torvalds return status; 40441da177e4SLinus Torvalds } 40451da177e4SLinus Torvalds 40468e09f215SStefan Weinhuber /* 4047f3eb5384SStefan Weinhuber * Modify ccw/tcw in cqr so it can be started on a base device. 40488e09f215SStefan Weinhuber * 40498e09f215SStefan Weinhuber * Note that this is not enough to restart the cqr! 40508e09f215SStefan Weinhuber * Either reset cqr->startdev as well (summary unit check handling) 40518e09f215SStefan Weinhuber * or restart via separate cqr (as in ERP handling). 40528e09f215SStefan Weinhuber */ 40538e09f215SStefan Weinhuber void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 40548e09f215SStefan Weinhuber { 40558e09f215SStefan Weinhuber struct ccw1 *ccw; 40568e09f215SStefan Weinhuber struct PFX_eckd_data *pfxdata; 4057f3eb5384SStefan Weinhuber struct tcw *tcw; 4058f3eb5384SStefan Weinhuber struct tccb *tccb; 4059f3eb5384SStefan Weinhuber struct dcw *dcw; 40608e09f215SStefan Weinhuber 4061f3eb5384SStefan Weinhuber if (cqr->cpmode == 1) { 4062f3eb5384SStefan Weinhuber tcw = cqr->cpaddr; 4063f3eb5384SStefan Weinhuber tccb = tcw_get_tccb(tcw); 4064f3eb5384SStefan Weinhuber dcw = (struct dcw *)&tccb->tca[0]; 4065f3eb5384SStefan Weinhuber pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; 4066f3eb5384SStefan Weinhuber pfxdata->validity.verify_base = 0; 4067f3eb5384SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 4068f3eb5384SStefan Weinhuber } else { 40698e09f215SStefan Weinhuber ccw = cqr->cpaddr; 40708e09f215SStefan Weinhuber pfxdata = cqr->data; 40718e09f215SStefan Weinhuber if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 40728e09f215SStefan Weinhuber pfxdata->validity.verify_base = 0; 40738e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 40748e09f215SStefan Weinhuber } 40758e09f215SStefan Weinhuber } 4076f3eb5384SStefan Weinhuber } 40778e09f215SStefan Weinhuber 40788e09f215SStefan Weinhuber #define DASD_ECKD_CHANQ_MAX_SIZE 4 40798e09f215SStefan Weinhuber 40808e09f215SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 40818e09f215SStefan Weinhuber struct dasd_block *block, 40828e09f215SStefan Weinhuber struct request *req) 40838e09f215SStefan Weinhuber { 40848e09f215SStefan Weinhuber struct dasd_eckd_private *private; 40858e09f215SStefan Weinhuber struct dasd_device *startdev; 40868e09f215SStefan Weinhuber unsigned long flags; 40878e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 40888e09f215SStefan Weinhuber 40898e09f215SStefan Weinhuber startdev = dasd_alias_get_start_dev(base); 40908e09f215SStefan Weinhuber if (!startdev) 40918e09f215SStefan Weinhuber startdev = base; 4092543691a4SSebastian Ott private = startdev->private; 40938e09f215SStefan Weinhuber if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 40948e09f215SStefan Weinhuber return ERR_PTR(-EBUSY); 40958e09f215SStefan Weinhuber 40968e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 40978e09f215SStefan Weinhuber private->count++; 4098e4dbb0f2SStefan Haberland if ((base->features & DASD_FEATURE_USERAW)) 4099e4dbb0f2SStefan Haberland cqr = dasd_raw_build_cp(startdev, block, req); 4100e4dbb0f2SStefan Haberland else 41018e09f215SStefan Weinhuber cqr = dasd_eckd_build_cp(startdev, block, req); 41028e09f215SStefan Weinhuber if (IS_ERR(cqr)) 41038e09f215SStefan Weinhuber private->count--; 41048e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 41058e09f215SStefan Weinhuber return cqr; 41068e09f215SStefan Weinhuber } 41078e09f215SStefan Weinhuber 41088e09f215SStefan Weinhuber static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 41098e09f215SStefan Weinhuber struct request *req) 41108e09f215SStefan Weinhuber { 41118e09f215SStefan Weinhuber struct dasd_eckd_private *private; 41128e09f215SStefan Weinhuber unsigned long flags; 41138e09f215SStefan Weinhuber 41148e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 4115543691a4SSebastian Ott private = cqr->memdev->private; 41168e09f215SStefan Weinhuber private->count--; 41178e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 41188e09f215SStefan Weinhuber return dasd_eckd_free_cp(cqr, req); 41198e09f215SStefan Weinhuber } 41208e09f215SStefan Weinhuber 41211da177e4SLinus Torvalds static int 41221da177e4SLinus Torvalds dasd_eckd_fill_info(struct dasd_device * device, 41231da177e4SLinus Torvalds struct dasd_information2_t * info) 41241da177e4SLinus Torvalds { 4125543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 41261da177e4SLinus Torvalds 41271da177e4SLinus Torvalds info->label_block = 2; 41281da177e4SLinus Torvalds info->FBA_layout = private->uses_cdl ? 0 : 1; 41291da177e4SLinus Torvalds info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 4130543691a4SSebastian Ott info->characteristics_size = sizeof(private->rdc_data); 41311da177e4SLinus Torvalds memcpy(info->characteristics, &private->rdc_data, 4132543691a4SSebastian Ott sizeof(private->rdc_data)); 41334abb08c2SStefan Weinhuber info->confdata_size = min((unsigned long)private->conf_len, 41344abb08c2SStefan Weinhuber sizeof(info->configuration_data)); 41354abb08c2SStefan Weinhuber memcpy(info->configuration_data, private->conf_data, 41364abb08c2SStefan Weinhuber info->confdata_size); 41371da177e4SLinus Torvalds return 0; 41381da177e4SLinus Torvalds } 41391da177e4SLinus Torvalds 41401da177e4SLinus Torvalds /* 41411da177e4SLinus Torvalds * SECTION: ioctl functions for eckd devices. 41421da177e4SLinus Torvalds */ 41431da177e4SLinus Torvalds 41441da177e4SLinus Torvalds /* 41451da177e4SLinus Torvalds * Release device ioctl. 41461da177e4SLinus Torvalds * Buils a channel programm to releases a prior reserved 41471da177e4SLinus Torvalds * (see dasd_eckd_reserve) device. 41481da177e4SLinus Torvalds */ 41491da177e4SLinus Torvalds static int 41501107ccfbSChristoph Hellwig dasd_eckd_release(struct dasd_device *device) 41511da177e4SLinus Torvalds { 41521da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 41531da177e4SLinus Torvalds int rc; 4154f3eb5384SStefan Weinhuber struct ccw1 *ccw; 4155f932bceaSStefan Weinhuber int useglobal; 41561da177e4SLinus Torvalds 41571da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 41581da177e4SLinus Torvalds return -EACCES; 41591da177e4SLinus Torvalds 4160f932bceaSStefan Weinhuber useglobal = 0; 416168b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 41621da177e4SLinus Torvalds if (IS_ERR(cqr)) { 4163f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 4164f932bceaSStefan Weinhuber useglobal = 1; 4165f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 4166f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 4167f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 4168f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 4169f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 4170f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 4171f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 41721da177e4SLinus Torvalds } 4173f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 4174f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RELEASE; 4175f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4176f3eb5384SStefan Weinhuber ccw->count = 32; 4177f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 41788e09f215SStefan Weinhuber cqr->startdev = device; 41798e09f215SStefan Weinhuber cqr->memdev = device; 41801da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 41811c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4182336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 41831da177e4SLinus Torvalds cqr->expires = 2 * HZ; 41841aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 41851da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 41861da177e4SLinus Torvalds 41871da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 41885a27e60dSStefan Weinhuber if (!rc) 41895a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 41901da177e4SLinus Torvalds 4191f932bceaSStefan Weinhuber if (useglobal) 4192f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 4193f932bceaSStefan Weinhuber else 41948e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 41951da177e4SLinus Torvalds return rc; 41961da177e4SLinus Torvalds } 41971da177e4SLinus Torvalds 41981da177e4SLinus Torvalds /* 41991da177e4SLinus Torvalds * Reserve device ioctl. 42001da177e4SLinus Torvalds * Options are set to 'synchronous wait for interrupt' and 42011da177e4SLinus Torvalds * 'timeout the request'. This leads to a terminate IO if 42021da177e4SLinus Torvalds * the interrupt is outstanding for a certain time. 42031da177e4SLinus Torvalds */ 42041da177e4SLinus Torvalds static int 42051107ccfbSChristoph Hellwig dasd_eckd_reserve(struct dasd_device *device) 42061da177e4SLinus Torvalds { 42071da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 42081da177e4SLinus Torvalds int rc; 4209f3eb5384SStefan Weinhuber struct ccw1 *ccw; 4210f932bceaSStefan Weinhuber int useglobal; 42111da177e4SLinus Torvalds 42121da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 42131da177e4SLinus Torvalds return -EACCES; 42141da177e4SLinus Torvalds 4215f932bceaSStefan Weinhuber useglobal = 0; 421668b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 42171da177e4SLinus Torvalds if (IS_ERR(cqr)) { 4218f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 4219f932bceaSStefan Weinhuber useglobal = 1; 4220f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 4221f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 4222f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 4223f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 4224f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 4225f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 4226f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 42271da177e4SLinus Torvalds } 4228f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 4229f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RESERVE; 4230f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4231f3eb5384SStefan Weinhuber ccw->count = 32; 4232f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 42338e09f215SStefan Weinhuber cqr->startdev = device; 42348e09f215SStefan Weinhuber cqr->memdev = device; 42351da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 42361c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4237336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 42381da177e4SLinus Torvalds cqr->expires = 2 * HZ; 42391aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 42401da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 42411da177e4SLinus Torvalds 42421da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 42435a27e60dSStefan Weinhuber if (!rc) 42445a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 42451da177e4SLinus Torvalds 4246f932bceaSStefan Weinhuber if (useglobal) 4247f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 4248f932bceaSStefan Weinhuber else 42498e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 42501da177e4SLinus Torvalds return rc; 42511da177e4SLinus Torvalds } 42521da177e4SLinus Torvalds 42531da177e4SLinus Torvalds /* 42541da177e4SLinus Torvalds * Steal lock ioctl - unconditional reserve device. 42551da177e4SLinus Torvalds * Buils a channel programm to break a device's reservation. 42561da177e4SLinus Torvalds * (unconditional reserve) 42571da177e4SLinus Torvalds */ 42581da177e4SLinus Torvalds static int 42591107ccfbSChristoph Hellwig dasd_eckd_steal_lock(struct dasd_device *device) 42601da177e4SLinus Torvalds { 42611da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 42621da177e4SLinus Torvalds int rc; 4263f3eb5384SStefan Weinhuber struct ccw1 *ccw; 4264f932bceaSStefan Weinhuber int useglobal; 42651da177e4SLinus Torvalds 42661da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 42671da177e4SLinus Torvalds return -EACCES; 42681da177e4SLinus Torvalds 4269f932bceaSStefan Weinhuber useglobal = 0; 427068b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 42711da177e4SLinus Torvalds if (IS_ERR(cqr)) { 4272f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 4273f932bceaSStefan Weinhuber useglobal = 1; 4274f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 4275f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 4276f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 4277f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 4278f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 4279f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 4280f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 42811da177e4SLinus Torvalds } 4282f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 4283f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SLCK; 4284f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4285f3eb5384SStefan Weinhuber ccw->count = 32; 4286f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 42878e09f215SStefan Weinhuber cqr->startdev = device; 42888e09f215SStefan Weinhuber cqr->memdev = device; 42891da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 42901c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4291336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 42921da177e4SLinus Torvalds cqr->expires = 2 * HZ; 42931aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 42941da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 42951da177e4SLinus Torvalds 42961da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 42975a27e60dSStefan Weinhuber if (!rc) 42985a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 42991da177e4SLinus Torvalds 4300f932bceaSStefan Weinhuber if (useglobal) 4301f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 4302f932bceaSStefan Weinhuber else 43038e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 43041da177e4SLinus Torvalds return rc; 43051da177e4SLinus Torvalds } 43061da177e4SLinus Torvalds 43071da177e4SLinus Torvalds /* 4308196339f1SStefan Weinhuber * SNID - Sense Path Group ID 4309196339f1SStefan Weinhuber * This ioctl may be used in situations where I/O is stalled due to 4310196339f1SStefan Weinhuber * a reserve, so if the normal dasd_smalloc_request fails, we use the 4311196339f1SStefan Weinhuber * preallocated dasd_reserve_req. 4312196339f1SStefan Weinhuber */ 4313196339f1SStefan Weinhuber static int dasd_eckd_snid(struct dasd_device *device, 4314196339f1SStefan Weinhuber void __user *argp) 4315196339f1SStefan Weinhuber { 4316196339f1SStefan Weinhuber struct dasd_ccw_req *cqr; 4317196339f1SStefan Weinhuber int rc; 4318196339f1SStefan Weinhuber struct ccw1 *ccw; 4319196339f1SStefan Weinhuber int useglobal; 4320196339f1SStefan Weinhuber struct dasd_snid_ioctl_data usrparm; 4321196339f1SStefan Weinhuber 4322196339f1SStefan Weinhuber if (!capable(CAP_SYS_ADMIN)) 4323196339f1SStefan Weinhuber return -EACCES; 4324196339f1SStefan Weinhuber 4325196339f1SStefan Weinhuber if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 4326196339f1SStefan Weinhuber return -EFAULT; 4327196339f1SStefan Weinhuber 4328196339f1SStefan Weinhuber useglobal = 0; 4329196339f1SStefan Weinhuber cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 4330196339f1SStefan Weinhuber sizeof(struct dasd_snid_data), device); 4331196339f1SStefan Weinhuber if (IS_ERR(cqr)) { 4332196339f1SStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 4333196339f1SStefan Weinhuber useglobal = 1; 4334196339f1SStefan Weinhuber cqr = &dasd_reserve_req->cqr; 4335196339f1SStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 4336196339f1SStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 4337196339f1SStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 4338196339f1SStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 4339196339f1SStefan Weinhuber cqr->data = &dasd_reserve_req->data; 4340196339f1SStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 4341196339f1SStefan Weinhuber } 4342196339f1SStefan Weinhuber ccw = cqr->cpaddr; 4343196339f1SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SNID; 4344196339f1SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4345196339f1SStefan Weinhuber ccw->count = 12; 4346196339f1SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 4347196339f1SStefan Weinhuber cqr->startdev = device; 4348196339f1SStefan Weinhuber cqr->memdev = device; 4349196339f1SStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 4350196339f1SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 43515a27e60dSStefan Weinhuber set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 4352196339f1SStefan Weinhuber cqr->retries = 5; 4353196339f1SStefan Weinhuber cqr->expires = 10 * HZ; 43541aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 4355196339f1SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 4356196339f1SStefan Weinhuber cqr->lpm = usrparm.path_mask; 4357196339f1SStefan Weinhuber 4358196339f1SStefan Weinhuber rc = dasd_sleep_on_immediatly(cqr); 4359196339f1SStefan Weinhuber /* verify that I/O processing didn't modify the path mask */ 4360196339f1SStefan Weinhuber if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) 4361196339f1SStefan Weinhuber rc = -EIO; 4362196339f1SStefan Weinhuber if (!rc) { 4363196339f1SStefan Weinhuber usrparm.data = *((struct dasd_snid_data *)cqr->data); 4364196339f1SStefan Weinhuber if (copy_to_user(argp, &usrparm, sizeof(usrparm))) 4365196339f1SStefan Weinhuber rc = -EFAULT; 4366196339f1SStefan Weinhuber } 4367196339f1SStefan Weinhuber 4368196339f1SStefan Weinhuber if (useglobal) 4369196339f1SStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 4370196339f1SStefan Weinhuber else 4371196339f1SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 4372196339f1SStefan Weinhuber return rc; 4373196339f1SStefan Weinhuber } 4374196339f1SStefan Weinhuber 4375196339f1SStefan Weinhuber /* 43761da177e4SLinus Torvalds * Read performance statistics 43771da177e4SLinus Torvalds */ 43781da177e4SLinus Torvalds static int 43791107ccfbSChristoph Hellwig dasd_eckd_performance(struct dasd_device *device, void __user *argp) 43801da177e4SLinus Torvalds { 43811da177e4SLinus Torvalds struct dasd_psf_prssd_data *prssdp; 43821da177e4SLinus Torvalds struct dasd_rssd_perf_stats_t *stats; 43831da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 43841da177e4SLinus Torvalds struct ccw1 *ccw; 43851da177e4SLinus Torvalds int rc; 43861da177e4SLinus Torvalds 438768b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 43881da177e4SLinus Torvalds (sizeof(struct dasd_psf_prssd_data) + 43891da177e4SLinus Torvalds sizeof(struct dasd_rssd_perf_stats_t)), 43901da177e4SLinus Torvalds device); 43911da177e4SLinus Torvalds if (IS_ERR(cqr)) { 4392fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 43931da177e4SLinus Torvalds "Could not allocate initialization request"); 43941da177e4SLinus Torvalds return PTR_ERR(cqr); 43951da177e4SLinus Torvalds } 43968e09f215SStefan Weinhuber cqr->startdev = device; 43978e09f215SStefan Weinhuber cqr->memdev = device; 43981da177e4SLinus Torvalds cqr->retries = 0; 4399eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 44001da177e4SLinus Torvalds cqr->expires = 10 * HZ; 44011da177e4SLinus Torvalds 44021da177e4SLinus Torvalds /* Prepare for Read Subsystem Data */ 44031da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 44041da177e4SLinus Torvalds memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 44051da177e4SLinus Torvalds prssdp->order = PSF_ORDER_PRSSD; 44065d67d164SJoe Perches prssdp->suborder = 0x01; /* Performance Statistics */ 44071da177e4SLinus Torvalds prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 44081da177e4SLinus Torvalds 44091da177e4SLinus Torvalds ccw = cqr->cpaddr; 44101da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_PSF; 44111da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_psf_prssd_data); 44121da177e4SLinus Torvalds ccw->flags |= CCW_FLAG_CC; 44131da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) prssdp; 44141da177e4SLinus Torvalds 44151da177e4SLinus Torvalds /* Read Subsystem Data - Performance Statistics */ 44161da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 44171da177e4SLinus Torvalds memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 44181da177e4SLinus Torvalds 44191da177e4SLinus Torvalds ccw++; 44201da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_RSSD; 44211da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 44221da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) stats; 44231da177e4SLinus Torvalds 44241aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 44251da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 44261da177e4SLinus Torvalds rc = dasd_sleep_on(cqr); 44271da177e4SLinus Torvalds if (rc == 0) { 44281da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 44291da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 44301107ccfbSChristoph Hellwig if (copy_to_user(argp, stats, 44311107ccfbSChristoph Hellwig sizeof(struct dasd_rssd_perf_stats_t))) 44321107ccfbSChristoph Hellwig rc = -EFAULT; 44331da177e4SLinus Torvalds } 44348e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 44351da177e4SLinus Torvalds return rc; 44361da177e4SLinus Torvalds } 44371da177e4SLinus Torvalds 44381da177e4SLinus Torvalds /* 44391da177e4SLinus Torvalds * Get attributes (cache operations) 44401da177e4SLinus Torvalds * Returnes the cache attributes used in Define Extend (DE). 44411da177e4SLinus Torvalds */ 44421da177e4SLinus Torvalds static int 44431107ccfbSChristoph Hellwig dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 44441da177e4SLinus Torvalds { 4445543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 44461107ccfbSChristoph Hellwig struct attrib_data_t attrib = private->attrib; 44471da177e4SLinus Torvalds int rc; 44481da177e4SLinus Torvalds 44491da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 44501da177e4SLinus Torvalds return -EACCES; 44511107ccfbSChristoph Hellwig if (!argp) 44521da177e4SLinus Torvalds return -EINVAL; 44531da177e4SLinus Torvalds 44541107ccfbSChristoph Hellwig rc = 0; 44551107ccfbSChristoph Hellwig if (copy_to_user(argp, (long *) &attrib, 44561107ccfbSChristoph Hellwig sizeof(struct attrib_data_t))) 44571107ccfbSChristoph Hellwig rc = -EFAULT; 44581da177e4SLinus Torvalds 44591da177e4SLinus Torvalds return rc; 44601da177e4SLinus Torvalds } 44611da177e4SLinus Torvalds 44621da177e4SLinus Torvalds /* 44631da177e4SLinus Torvalds * Set attributes (cache operations) 44641da177e4SLinus Torvalds * Stores the attributes for cache operation to be used in Define Extend (DE). 44651da177e4SLinus Torvalds */ 44661da177e4SLinus Torvalds static int 44671107ccfbSChristoph Hellwig dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 44681da177e4SLinus Torvalds { 4469543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 44701da177e4SLinus Torvalds struct attrib_data_t attrib; 44711da177e4SLinus Torvalds 44721da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 44731da177e4SLinus Torvalds return -EACCES; 44741107ccfbSChristoph Hellwig if (!argp) 44751da177e4SLinus Torvalds return -EINVAL; 44761da177e4SLinus Torvalds 44771107ccfbSChristoph Hellwig if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 44781da177e4SLinus Torvalds return -EFAULT; 44791da177e4SLinus Torvalds private->attrib = attrib; 44801da177e4SLinus Torvalds 4481fc19f381SStefan Haberland dev_info(&device->cdev->dev, 4482fc19f381SStefan Haberland "The DASD cache mode was set to %x (%i cylinder prestage)\n", 44831da177e4SLinus Torvalds private->attrib.operation, private->attrib.nr_cyl); 44841da177e4SLinus Torvalds return 0; 44851da177e4SLinus Torvalds } 44861da177e4SLinus Torvalds 4487ab1d848fSNigel Hislop /* 4488ab1d848fSNigel Hislop * Issue syscall I/O to EMC Symmetrix array. 4489ab1d848fSNigel Hislop * CCWs are PSF and RSSD 4490ab1d848fSNigel Hislop */ 4491ab1d848fSNigel Hislop static int dasd_symm_io(struct dasd_device *device, void __user *argp) 4492ab1d848fSNigel Hislop { 4493ab1d848fSNigel Hislop struct dasd_symmio_parms usrparm; 4494ab1d848fSNigel Hislop char *psf_data, *rssd_result; 4495ab1d848fSNigel Hislop struct dasd_ccw_req *cqr; 4496ab1d848fSNigel Hislop struct ccw1 *ccw; 449752898025SNigel Hislop char psf0, psf1; 4498ab1d848fSNigel Hislop int rc; 4499ab1d848fSNigel Hislop 450052898025SNigel Hislop if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) 450152898025SNigel Hislop return -EACCES; 450252898025SNigel Hislop psf0 = psf1 = 0; 450352898025SNigel Hislop 4504ab1d848fSNigel Hislop /* Copy parms from caller */ 4505ab1d848fSNigel Hislop rc = -EFAULT; 4506ab1d848fSNigel Hislop if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 4507ab1d848fSNigel Hislop goto out; 450892d62891SHeiko Carstens if (is_compat_task()) { 4509ab1d848fSNigel Hislop /* Make sure pointers are sane even on 31 bit. */ 4510ab1d848fSNigel Hislop rc = -EINVAL; 4511f8b06859SHeiko Carstens if ((usrparm.psf_data >> 32) != 0) 4512ab1d848fSNigel Hislop goto out; 4513f8b06859SHeiko Carstens if ((usrparm.rssd_result >> 32) != 0) 4514f8b06859SHeiko Carstens goto out; 4515f8b06859SHeiko Carstens usrparm.psf_data &= 0x7fffffffULL; 4516f8b06859SHeiko Carstens usrparm.rssd_result &= 0x7fffffffULL; 4517ab1d848fSNigel Hislop } 4518ab1d848fSNigel Hislop /* alloc I/O data area */ 4519ab1d848fSNigel Hislop psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 4520ab1d848fSNigel Hislop rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 4521ab1d848fSNigel Hislop if (!psf_data || !rssd_result) { 4522ab1d848fSNigel Hislop rc = -ENOMEM; 4523ab1d848fSNigel Hislop goto out_free; 4524ab1d848fSNigel Hislop } 4525ab1d848fSNigel Hislop 4526ab1d848fSNigel Hislop /* get syscall header from user space */ 4527ab1d848fSNigel Hislop rc = -EFAULT; 4528ab1d848fSNigel Hislop if (copy_from_user(psf_data, 4529ab1d848fSNigel Hislop (void __user *)(unsigned long) usrparm.psf_data, 4530ab1d848fSNigel Hislop usrparm.psf_data_len)) 4531ab1d848fSNigel Hislop goto out_free; 453252898025SNigel Hislop psf0 = psf_data[0]; 453352898025SNigel Hislop psf1 = psf_data[1]; 4534ab1d848fSNigel Hislop 4535ab1d848fSNigel Hislop /* setup CCWs for PSF + RSSD */ 453668b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device); 4537ab1d848fSNigel Hislop if (IS_ERR(cqr)) { 4538fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 4539ab1d848fSNigel Hislop "Could not allocate initialization request"); 4540ab1d848fSNigel Hislop rc = PTR_ERR(cqr); 4541ab1d848fSNigel Hislop goto out_free; 4542ab1d848fSNigel Hislop } 4543ab1d848fSNigel Hislop 4544ab1d848fSNigel Hislop cqr->startdev = device; 4545ab1d848fSNigel Hislop cqr->memdev = device; 4546ab1d848fSNigel Hislop cqr->retries = 3; 4547ab1d848fSNigel Hislop cqr->expires = 10 * HZ; 45481aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 4549ab1d848fSNigel Hislop cqr->status = DASD_CQR_FILLED; 4550ab1d848fSNigel Hislop 4551ab1d848fSNigel Hislop /* Build the ccws */ 4552ab1d848fSNigel Hislop ccw = cqr->cpaddr; 4553ab1d848fSNigel Hislop 4554ab1d848fSNigel Hislop /* PSF ccw */ 4555ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_PSF; 4556ab1d848fSNigel Hislop ccw->count = usrparm.psf_data_len; 4557ab1d848fSNigel Hislop ccw->flags |= CCW_FLAG_CC; 4558ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) psf_data; 4559ab1d848fSNigel Hislop 4560ab1d848fSNigel Hislop ccw++; 4561ab1d848fSNigel Hislop 4562ab1d848fSNigel Hislop /* RSSD ccw */ 4563ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_RSSD; 4564ab1d848fSNigel Hislop ccw->count = usrparm.rssd_result_len; 4565ab1d848fSNigel Hislop ccw->flags = CCW_FLAG_SLI ; 4566ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) rssd_result; 4567ab1d848fSNigel Hislop 4568ab1d848fSNigel Hislop rc = dasd_sleep_on(cqr); 4569ab1d848fSNigel Hislop if (rc) 4570ab1d848fSNigel Hislop goto out_sfree; 4571ab1d848fSNigel Hislop 4572ab1d848fSNigel Hislop rc = -EFAULT; 4573ab1d848fSNigel Hislop if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 4574ab1d848fSNigel Hislop rssd_result, usrparm.rssd_result_len)) 4575ab1d848fSNigel Hislop goto out_sfree; 4576ab1d848fSNigel Hislop rc = 0; 4577ab1d848fSNigel Hislop 4578ab1d848fSNigel Hislop out_sfree: 4579ab1d848fSNigel Hislop dasd_sfree_request(cqr, cqr->memdev); 4580ab1d848fSNigel Hislop out_free: 4581ab1d848fSNigel Hislop kfree(rssd_result); 4582ab1d848fSNigel Hislop kfree(psf_data); 4583ab1d848fSNigel Hislop out: 458452898025SNigel Hislop DBF_DEV_EVENT(DBF_WARNING, device, 458552898025SNigel Hislop "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", 458652898025SNigel Hislop (int) psf0, (int) psf1, rc); 4587ab1d848fSNigel Hislop return rc; 4588ab1d848fSNigel Hislop } 4589ab1d848fSNigel Hislop 45901107ccfbSChristoph Hellwig static int 45918e09f215SStefan Weinhuber dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 45921107ccfbSChristoph Hellwig { 45938e09f215SStefan Weinhuber struct dasd_device *device = block->base; 45948e09f215SStefan Weinhuber 45951107ccfbSChristoph Hellwig switch (cmd) { 45961107ccfbSChristoph Hellwig case BIODASDGATTR: 45971107ccfbSChristoph Hellwig return dasd_eckd_get_attrib(device, argp); 45981107ccfbSChristoph Hellwig case BIODASDSATTR: 45991107ccfbSChristoph Hellwig return dasd_eckd_set_attrib(device, argp); 46001107ccfbSChristoph Hellwig case BIODASDPSRD: 46011107ccfbSChristoph Hellwig return dasd_eckd_performance(device, argp); 46021107ccfbSChristoph Hellwig case BIODASDRLSE: 46031107ccfbSChristoph Hellwig return dasd_eckd_release(device); 46041107ccfbSChristoph Hellwig case BIODASDRSRV: 46051107ccfbSChristoph Hellwig return dasd_eckd_reserve(device); 46061107ccfbSChristoph Hellwig case BIODASDSLCK: 46071107ccfbSChristoph Hellwig return dasd_eckd_steal_lock(device); 4608196339f1SStefan Weinhuber case BIODASDSNID: 4609196339f1SStefan Weinhuber return dasd_eckd_snid(device, argp); 4610ab1d848fSNigel Hislop case BIODASDSYMMIO: 4611ab1d848fSNigel Hislop return dasd_symm_io(device, argp); 46121107ccfbSChristoph Hellwig default: 46136b79d14eSHeiko Carstens return -ENOTTY; 46141107ccfbSChristoph Hellwig } 46151107ccfbSChristoph Hellwig } 46161107ccfbSChristoph Hellwig 46171da177e4SLinus Torvalds /* 4618445b5b49SHorst Hummel * Dump the range of CCWs into 'page' buffer 4619445b5b49SHorst Hummel * and return number of printed chars. 4620445b5b49SHorst Hummel */ 46214d284cacSHeiko Carstens static int 4622445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 4623445b5b49SHorst Hummel { 4624445b5b49SHorst Hummel int len, count; 4625445b5b49SHorst Hummel char *datap; 4626445b5b49SHorst Hummel 4627445b5b49SHorst Hummel len = 0; 4628445b5b49SHorst Hummel while (from <= to) { 4629773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4630445b5b49SHorst Hummel " CCW %p: %08X %08X DAT:", 4631445b5b49SHorst Hummel from, ((int *) from)[0], ((int *) from)[1]); 4632445b5b49SHorst Hummel 4633445b5b49SHorst Hummel /* get pointer to data (consider IDALs) */ 4634445b5b49SHorst Hummel if (from->flags & CCW_FLAG_IDA) 4635445b5b49SHorst Hummel datap = (char *) *((addr_t *) (addr_t) from->cda); 4636445b5b49SHorst Hummel else 4637445b5b49SHorst Hummel datap = (char *) ((addr_t) from->cda); 4638445b5b49SHorst Hummel 4639445b5b49SHorst Hummel /* dump data (max 32 bytes) */ 4640445b5b49SHorst Hummel for (count = 0; count < from->count && count < 32; count++) { 4641445b5b49SHorst Hummel if (count % 8 == 0) len += sprintf(page + len, " "); 4642445b5b49SHorst Hummel if (count % 4 == 0) len += sprintf(page + len, " "); 4643445b5b49SHorst Hummel len += sprintf(page + len, "%02x", datap[count]); 4644445b5b49SHorst Hummel } 4645445b5b49SHorst Hummel len += sprintf(page + len, "\n"); 4646445b5b49SHorst Hummel from++; 4647445b5b49SHorst Hummel } 4648445b5b49SHorst Hummel return len; 4649445b5b49SHorst Hummel } 4650445b5b49SHorst Hummel 4651fc19f381SStefan Haberland static void 4652aeec92caSStefan Haberland dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 4653aeec92caSStefan Haberland char *reason) 4654fc19f381SStefan Haberland { 4655fc19f381SStefan Haberland u64 *sense; 4656a5a0061fSStefan Weinhuber u64 *stat; 4657fc19f381SStefan Haberland 4658aeec92caSStefan Haberland sense = (u64 *) dasd_get_sense(irb); 4659a5a0061fSStefan Weinhuber stat = (u64 *) &irb->scsw; 4660fc19f381SStefan Haberland if (sense) { 4661a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " 4662a5a0061fSStefan Weinhuber "%016llx %016llx %016llx %016llx", 4663a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 4664ed3640b2SStefan Haberland sense[0], sense[1], sense[2], sense[3]); 4665fc19f381SStefan Haberland } else { 4666a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", 4667a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 4668a5a0061fSStefan Weinhuber "NO VALID SENSE"); 4669fc19f381SStefan Haberland } 4670fc19f381SStefan Haberland } 4671fc19f381SStefan Haberland 4672445b5b49SHorst Hummel /* 46731da177e4SLinus Torvalds * Print sense data and related channel program. 46741da177e4SLinus Torvalds * Parts are printed because printk buffer is only 1024 bytes. 46751da177e4SLinus Torvalds */ 4676f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 46778e09f215SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 46781da177e4SLinus Torvalds { 46791da177e4SLinus Torvalds char *page; 4680445b5b49SHorst Hummel struct ccw1 *first, *last, *fail, *from, *to; 4681445b5b49SHorst Hummel int len, sl, sct; 46821da177e4SLinus Torvalds 46831da177e4SLinus Torvalds page = (char *) get_zeroed_page(GFP_ATOMIC); 46841da177e4SLinus Torvalds if (page == NULL) { 4685fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 4686fc19f381SStefan Haberland "No memory to dump sense data\n"); 46871da177e4SLinus Torvalds return; 46881da177e4SLinus Torvalds } 4689445b5b49SHorst Hummel /* dump the sense data */ 4690773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 46911da177e4SLinus Torvalds " I/O status report for device %s:\n", 46922a0217d5SKay Sievers dev_name(&device->cdev->dev)); 4693773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4694a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 4695a5a0061fSStefan Weinhuber "CS:%02X RC:%d\n", 4696a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 4697a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 4698a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 4699a5a0061fSStefan Weinhuber req ? req->intrc : 0); 4700773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 47011da177e4SLinus Torvalds " device %s: Failing CCW: %p\n", 47022a0217d5SKay Sievers dev_name(&device->cdev->dev), 470323d805b6SPeter Oberparleiter (void *) (addr_t) irb->scsw.cmd.cpa); 47041da177e4SLinus Torvalds if (irb->esw.esw0.erw.cons) { 47051da177e4SLinus Torvalds for (sl = 0; sl < 4; sl++) { 4706773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 47071da177e4SLinus Torvalds " Sense(hex) %2d-%2d:", 47081da177e4SLinus Torvalds (8 * sl), ((8 * sl) + 7)); 47091da177e4SLinus Torvalds 47101da177e4SLinus Torvalds for (sct = 0; sct < 8; sct++) { 47111da177e4SLinus Torvalds len += sprintf(page + len, " %02x", 47121da177e4SLinus Torvalds irb->ecw[8 * sl + sct]); 47131da177e4SLinus Torvalds } 47141da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 47151da177e4SLinus Torvalds } 47161da177e4SLinus Torvalds 47171da177e4SLinus Torvalds if (irb->ecw[27] & DASD_SENSE_BIT_0) { 47181da177e4SLinus Torvalds /* 24 Byte Sense Data */ 4719773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 47201da177e4SLinus Torvalds " 24 Byte: %x MSG %x, " 47211da177e4SLinus Torvalds "%s MSGb to SYSOP\n", 47221da177e4SLinus Torvalds irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 47231da177e4SLinus Torvalds irb->ecw[1] & 0x10 ? "" : "no"); 47241da177e4SLinus Torvalds } else { 47251da177e4SLinus Torvalds /* 32 Byte Sense Data */ 4726773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 47271da177e4SLinus Torvalds " 32 Byte: Format: %x " 47281da177e4SLinus Torvalds "Exception class %x\n", 47291da177e4SLinus Torvalds irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 47301da177e4SLinus Torvalds } 47311da177e4SLinus Torvalds } else { 4732773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 47331da177e4SLinus Torvalds " SORRY - NO VALID SENSE AVAILABLE\n"); 47341da177e4SLinus Torvalds } 4735773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 47361da177e4SLinus Torvalds 47378e09f215SStefan Weinhuber if (req) { 47388e09f215SStefan Weinhuber /* req == NULL for unsolicited interrupts */ 4739445b5b49SHorst Hummel /* dump the Channel Program (max 140 Bytes per line) */ 4740445b5b49SHorst Hummel /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 4741445b5b49SHorst Hummel first = req->cpaddr; 4742445b5b49SHorst Hummel for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 4743445b5b49SHorst Hummel to = min(first + 6, last); 4744773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 47451da177e4SLinus Torvalds " Related CP in req: %p\n", req); 4746445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(first, to, page + len); 4747773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 47481da177e4SLinus Torvalds 4749445b5b49SHorst Hummel /* print failing CCW area (maximum 4) */ 4750445b5b49SHorst Hummel /* scsw->cda is either valid or zero */ 47511da177e4SLinus Torvalds len = 0; 4752445b5b49SHorst Hummel from = ++to; 475323d805b6SPeter Oberparleiter fail = (struct ccw1 *)(addr_t) 475423d805b6SPeter Oberparleiter irb->scsw.cmd.cpa; /* failing CCW */ 4755445b5b49SHorst Hummel if (from < fail - 2) { 4756445b5b49SHorst Hummel from = fail - 2; /* there is a gap - print header */ 4757773bab4aSSebastian Ott len += sprintf(page, PRINTK_HEADER "......\n"); 47581da177e4SLinus Torvalds } 4759445b5b49SHorst Hummel to = min(fail + 1, last); 4760445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, to, page + len); 47611da177e4SLinus Torvalds 4762445b5b49SHorst Hummel /* print last CCWs (maximum 2) */ 4763445b5b49SHorst Hummel from = max(from, ++to); 4764445b5b49SHorst Hummel if (from < last - 1) { 4765445b5b49SHorst Hummel from = last - 1; /* there is a gap - print header */ 4766773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER "......\n"); 47671da177e4SLinus Torvalds } 4768445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, last, page + len); 47691da177e4SLinus Torvalds if (len > 0) 4770773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 47718e09f215SStefan Weinhuber } 47721da177e4SLinus Torvalds free_page((unsigned long) page); 47731da177e4SLinus Torvalds } 47741da177e4SLinus Torvalds 4775f3eb5384SStefan Weinhuber 4776f3eb5384SStefan Weinhuber /* 4777f3eb5384SStefan Weinhuber * Print sense data from a tcw. 4778f3eb5384SStefan Weinhuber */ 4779f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 4780f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 4781f3eb5384SStefan Weinhuber { 4782f3eb5384SStefan Weinhuber char *page; 4783f3eb5384SStefan Weinhuber int len, sl, sct, residual; 4784f3eb5384SStefan Weinhuber struct tsb *tsb; 4785ef19298bSStefan Weinhuber u8 *sense, *rcq; 4786f3eb5384SStefan Weinhuber 4787f3eb5384SStefan Weinhuber page = (char *) get_zeroed_page(GFP_ATOMIC); 4788f3eb5384SStefan Weinhuber if (page == NULL) { 4789fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, " %s", 4790f3eb5384SStefan Weinhuber "No memory to dump sense data"); 4791f3eb5384SStefan Weinhuber return; 4792f3eb5384SStefan Weinhuber } 4793f3eb5384SStefan Weinhuber /* dump the sense data */ 4794773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 4795f3eb5384SStefan Weinhuber " I/O status report for device %s:\n", 4796f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev)); 4797773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4798a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 4799a5a0061fSStefan Weinhuber "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", 4800a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 4801a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 4802a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 4803a521b048SStefan Haberland irb->scsw.tm.fcxs, 4804a521b048SStefan Haberland (irb->scsw.tm.ifob << 7) | irb->scsw.tm.sesq, 4805a5a0061fSStefan Weinhuber req ? req->intrc : 0); 4806773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4807f3eb5384SStefan Weinhuber " device %s: Failing TCW: %p\n", 4808f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev), 4809f3eb5384SStefan Weinhuber (void *) (addr_t) irb->scsw.tm.tcw); 4810f3eb5384SStefan Weinhuber 4811f3eb5384SStefan Weinhuber tsb = NULL; 4812f3eb5384SStefan Weinhuber sense = NULL; 4813a5a0061fSStefan Weinhuber if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) 4814f3eb5384SStefan Weinhuber tsb = tcw_get_tsb( 4815f3eb5384SStefan Weinhuber (struct tcw *)(unsigned long)irb->scsw.tm.tcw); 4816f3eb5384SStefan Weinhuber 4817b8fde722SStefan Haberland if (tsb) { 4818773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4819f3eb5384SStefan Weinhuber " tsb->length %d\n", tsb->length); 4820773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4821f3eb5384SStefan Weinhuber " tsb->flags %x\n", tsb->flags); 4822773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4823f3eb5384SStefan Weinhuber " tsb->dcw_offset %d\n", tsb->dcw_offset); 4824773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4825f3eb5384SStefan Weinhuber " tsb->count %d\n", tsb->count); 4826f3eb5384SStefan Weinhuber residual = tsb->count - 28; 4827773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4828f3eb5384SStefan Weinhuber " residual %d\n", residual); 4829f3eb5384SStefan Weinhuber 4830f3eb5384SStefan Weinhuber switch (tsb->flags & 0x07) { 4831f3eb5384SStefan Weinhuber case 1: /* tsa_iostat */ 4832773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4833f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_time %d\n", 4834f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_time); 4835773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4836f3eb5384SStefan Weinhuber " tsb->tsa.iostat.def_time %d\n", 4837f3eb5384SStefan Weinhuber tsb->tsa.iostat.def_time); 4838773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4839f3eb5384SStefan Weinhuber " tsb->tsa.iostat.queue_time %d\n", 4840f3eb5384SStefan Weinhuber tsb->tsa.iostat.queue_time); 4841773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4842f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_busy_time %d\n", 4843f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_busy_time); 4844773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4845f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_act_time %d\n", 4846f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_act_time); 4847f3eb5384SStefan Weinhuber sense = tsb->tsa.iostat.sense; 4848f3eb5384SStefan Weinhuber break; 4849f3eb5384SStefan Weinhuber case 2: /* ts_ddpc */ 4850773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4851f3eb5384SStefan Weinhuber " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); 4852ef19298bSStefan Weinhuber for (sl = 0; sl < 2; sl++) { 4853773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4854ef19298bSStefan Weinhuber " tsb->tsa.ddpc.rcq %2d-%2d: ", 4855ef19298bSStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 4856ef19298bSStefan Weinhuber rcq = tsb->tsa.ddpc.rcq; 4857f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 4858f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 4859ef19298bSStefan Weinhuber rcq[8 * sl + sct]); 4860f3eb5384SStefan Weinhuber } 4861f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 4862f3eb5384SStefan Weinhuber } 4863f3eb5384SStefan Weinhuber sense = tsb->tsa.ddpc.sense; 4864f3eb5384SStefan Weinhuber break; 4865f3eb5384SStefan Weinhuber case 3: /* tsa_intrg */ 4866773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 48678693b914SColin Ian King " tsb->tsa.intrg.: not supported yet\n"); 4868f3eb5384SStefan Weinhuber break; 4869f3eb5384SStefan Weinhuber } 4870f3eb5384SStefan Weinhuber 4871f3eb5384SStefan Weinhuber if (sense) { 4872f3eb5384SStefan Weinhuber for (sl = 0; sl < 4; sl++) { 4873773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4874f3eb5384SStefan Weinhuber " Sense(hex) %2d-%2d:", 4875f3eb5384SStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 4876f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 4877f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 4878f3eb5384SStefan Weinhuber sense[8 * sl + sct]); 4879f3eb5384SStefan Weinhuber } 4880f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 4881f3eb5384SStefan Weinhuber } 4882f3eb5384SStefan Weinhuber 4883f3eb5384SStefan Weinhuber if (sense[27] & DASD_SENSE_BIT_0) { 4884f3eb5384SStefan Weinhuber /* 24 Byte Sense Data */ 4885773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4886f3eb5384SStefan Weinhuber " 24 Byte: %x MSG %x, " 4887f3eb5384SStefan Weinhuber "%s MSGb to SYSOP\n", 4888f3eb5384SStefan Weinhuber sense[7] >> 4, sense[7] & 0x0f, 4889f3eb5384SStefan Weinhuber sense[1] & 0x10 ? "" : "no"); 4890f3eb5384SStefan Weinhuber } else { 4891f3eb5384SStefan Weinhuber /* 32 Byte Sense Data */ 4892773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4893f3eb5384SStefan Weinhuber " 32 Byte: Format: %x " 4894f3eb5384SStefan Weinhuber "Exception class %x\n", 4895f3eb5384SStefan Weinhuber sense[6] & 0x0f, sense[22] >> 4); 4896f3eb5384SStefan Weinhuber } 4897f3eb5384SStefan Weinhuber } else { 4898773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4899f3eb5384SStefan Weinhuber " SORRY - NO VALID SENSE AVAILABLE\n"); 4900f3eb5384SStefan Weinhuber } 4901f3eb5384SStefan Weinhuber } else { 4902773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4903f3eb5384SStefan Weinhuber " SORRY - NO TSB DATA AVAILABLE\n"); 4904f3eb5384SStefan Weinhuber } 4905773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 4906f3eb5384SStefan Weinhuber free_page((unsigned long) page); 4907f3eb5384SStefan Weinhuber } 4908f3eb5384SStefan Weinhuber 4909f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense(struct dasd_device *device, 4910f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 4911f3eb5384SStefan Weinhuber { 49128fd57520SJan Höppner u8 *sense = dasd_get_sense(irb); 49138fd57520SJan Höppner 49148fd57520SJan Höppner if (scsw_is_tm(&irb->scsw)) { 49158fd57520SJan Höppner /* 49168fd57520SJan Höppner * In some cases the 'File Protected' or 'Incorrect Length' 49178fd57520SJan Höppner * error might be expected and log messages shouldn't be written 49188fd57520SJan Höppner * then. Check if the according suppress bit is set. 49198fd57520SJan Höppner */ 49208fd57520SJan Höppner if (sense && (sense[1] & SNS1_FILE_PROTECTED) && 49218fd57520SJan Höppner test_bit(DASD_CQR_SUPPRESS_FP, &req->flags)) 49228fd57520SJan Höppner return; 49238fd57520SJan Höppner if (scsw_cstat(&irb->scsw) == 0x40 && 49248fd57520SJan Höppner test_bit(DASD_CQR_SUPPRESS_IL, &req->flags)) 49258fd57520SJan Höppner return; 49268fd57520SJan Höppner 4927f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_tcw(device, req, irb); 49288fd57520SJan Höppner } else { 49298fd57520SJan Höppner /* 4930ab24fbd3SStefan Haberland * In some cases the 'Command Reject' or 'No Record Found' 4931ab24fbd3SStefan Haberland * error might be expected and log messages shouldn't be 4932ab24fbd3SStefan Haberland * written then. Check if the according suppress bit is set. 49338fd57520SJan Höppner */ 4934ab24fbd3SStefan Haberland if (sense && sense[0] & SNS0_CMD_REJECT && 4935ab24fbd3SStefan Haberland test_bit(DASD_CQR_SUPPRESS_CR, &req->flags)) 4936ab24fbd3SStefan Haberland return; 4937ab24fbd3SStefan Haberland 49388fd57520SJan Höppner if (sense && sense[1] & SNS1_NO_REC_FOUND && 49398fd57520SJan Höppner test_bit(DASD_CQR_SUPPRESS_NRF, &req->flags)) 49408fd57520SJan Höppner return; 49418fd57520SJan Höppner 4942f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_ccw(device, req, irb); 4943f3eb5384SStefan Weinhuber } 49448fd57520SJan Höppner } 4945f3eb5384SStefan Weinhuber 4946501183f2SStefan Haberland static int dasd_eckd_pm_freeze(struct dasd_device *device) 4947d41dd122SStefan Haberland { 4948d41dd122SStefan Haberland /* 4949d41dd122SStefan Haberland * the device should be disconnected from our LCU structure 4950d41dd122SStefan Haberland * on restore we will reconnect it and reread LCU specific 4951d41dd122SStefan Haberland * information like PAV support that might have changed 4952d41dd122SStefan Haberland */ 4953d41dd122SStefan Haberland dasd_alias_remove_device(device); 4954d41dd122SStefan Haberland dasd_alias_disconnect_device_from_lcu(device); 4955d41dd122SStefan Haberland 4956d41dd122SStefan Haberland return 0; 4957d41dd122SStefan Haberland } 4958d41dd122SStefan Haberland 4959501183f2SStefan Haberland static int dasd_eckd_restore_device(struct dasd_device *device) 4960d41dd122SStefan Haberland { 4961543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 49626fca97a9SStefan Haberland struct dasd_eckd_characteristics temp_rdc_data; 4963f9f8d02fSStefan Haberland int rc; 4964d41dd122SStefan Haberland struct dasd_uid temp_uid; 4965a7602f6cSStefan Haberland unsigned long flags; 4966ea4da6eaSStefan Haberland unsigned long cqr_flags = 0; 4967d41dd122SStefan Haberland 4968d41dd122SStefan Haberland /* Read Configuration Data */ 4969251afd69SStefan Haberland rc = dasd_eckd_read_conf(device); 4970251afd69SStefan Haberland if (rc) { 4971251afd69SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 4972251afd69SStefan Haberland "Read configuration data failed, rc=%d", rc); 4973251afd69SStefan Haberland goto out_err; 4974251afd69SStefan Haberland } 4975d41dd122SStefan Haberland 49762dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 49772dedf0d9SStefan Haberland /* Generate device unique id */ 49782dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 49792dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4980d41dd122SStefan Haberland if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) 4981a7602f6cSStefan Haberland dev_err(&device->cdev->dev, "The UID of the DASD has " 4982a7602f6cSStefan Haberland "changed\n"); 49832dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4984d41dd122SStefan Haberland if (rc) 4985d41dd122SStefan Haberland goto out_err; 4986d41dd122SStefan Haberland 4987d41dd122SStefan Haberland /* register lcu with alias handling, enable PAV if this is a new lcu */ 4988f9f8d02fSStefan Haberland rc = dasd_alias_make_device_known_to_lcu(device); 4989f9f8d02fSStefan Haberland if (rc) 4990251afd69SStefan Haberland goto out_err; 4991ea4da6eaSStefan Haberland 4992ea4da6eaSStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr_flags); 4993ea4da6eaSStefan Haberland dasd_eckd_validate_server(device, cqr_flags); 4994f4ac1d02SStefan Weinhuber 4995f4ac1d02SStefan Weinhuber /* RE-Read Configuration Data */ 4996251afd69SStefan Haberland rc = dasd_eckd_read_conf(device); 4997251afd69SStefan Haberland if (rc) { 4998251afd69SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 4999251afd69SStefan Haberland "Read configuration data failed, rc=%d", rc); 5000251afd69SStefan Haberland goto out_err2; 5001251afd69SStefan Haberland } 5002d41dd122SStefan Haberland 5003d41dd122SStefan Haberland /* Read Feature Codes */ 500468d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 5005d41dd122SStefan Haberland 5006d41dd122SStefan Haberland /* Read Device Characteristics */ 500768b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 50086fca97a9SStefan Haberland &temp_rdc_data, 64); 5009d41dd122SStefan Haberland if (rc) { 5010b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 5011b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 5012251afd69SStefan Haberland goto out_err2; 5013d41dd122SStefan Haberland } 5014a7602f6cSStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 50156fca97a9SStefan Haberland memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data)); 5016a7602f6cSStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 5017d41dd122SStefan Haberland 5018d41dd122SStefan Haberland /* add device to alias management */ 5019d41dd122SStefan Haberland dasd_alias_add_device(device); 5020d41dd122SStefan Haberland 5021d41dd122SStefan Haberland return 0; 5022d41dd122SStefan Haberland 5023251afd69SStefan Haberland out_err2: 5024251afd69SStefan Haberland dasd_alias_disconnect_device_from_lcu(device); 5025d41dd122SStefan Haberland out_err: 5026e6125fbaSStefan Haberland return -1; 5027d41dd122SStefan Haberland } 5028d41dd122SStefan Haberland 5029501183f2SStefan Haberland static int dasd_eckd_reload_device(struct dasd_device *device) 5030501183f2SStefan Haberland { 5031543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 5032501183f2SStefan Haberland int rc, old_base; 50332dedf0d9SStefan Haberland char print_uid[60]; 50342dedf0d9SStefan Haberland struct dasd_uid uid; 50352dedf0d9SStefan Haberland unsigned long flags; 5036501183f2SStefan Haberland 503759a9ed5fSStefan Haberland /* 503859a9ed5fSStefan Haberland * remove device from alias handling to prevent new requests 503959a9ed5fSStefan Haberland * from being scheduled on the wrong alias device 504059a9ed5fSStefan Haberland */ 504159a9ed5fSStefan Haberland dasd_alias_remove_device(device); 504259a9ed5fSStefan Haberland 50432dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 5044501183f2SStefan Haberland old_base = private->uid.base_unit_addr; 50452dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 50462dedf0d9SStefan Haberland 5047501183f2SStefan Haberland /* Read Configuration Data */ 5048501183f2SStefan Haberland rc = dasd_eckd_read_conf(device); 5049501183f2SStefan Haberland if (rc) 5050501183f2SStefan Haberland goto out_err; 5051501183f2SStefan Haberland 50522dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 5053501183f2SStefan Haberland if (rc) 5054501183f2SStefan Haberland goto out_err; 5055501183f2SStefan Haberland /* 5056501183f2SStefan Haberland * update unit address configuration and 5057501183f2SStefan Haberland * add device to alias management 5058501183f2SStefan Haberland */ 5059501183f2SStefan Haberland dasd_alias_update_add_device(device); 5060501183f2SStefan Haberland 50612dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &uid); 50622dedf0d9SStefan Haberland 50632dedf0d9SStefan Haberland if (old_base != uid.base_unit_addr) { 50642dedf0d9SStefan Haberland if (strlen(uid.vduit) > 0) 50652dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 50662dedf0d9SStefan Haberland "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial, 50672dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr, uid.vduit); 5068501183f2SStefan Haberland else 50692dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 50702dedf0d9SStefan Haberland "%s.%s.%04x.%02x", uid.vendor, uid.serial, 50712dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr); 5072501183f2SStefan Haberland 5073501183f2SStefan Haberland dev_info(&device->cdev->dev, 5074501183f2SStefan Haberland "An Alias device was reassigned to a new base device " 50752dedf0d9SStefan Haberland "with UID: %s\n", print_uid); 5076501183f2SStefan Haberland } 5077501183f2SStefan Haberland return 0; 5078501183f2SStefan Haberland 5079501183f2SStefan Haberland out_err: 5080501183f2SStefan Haberland return -1; 5081501183f2SStefan Haberland } 5082501183f2SStefan Haberland 50835db8440cSStefan Haberland static int dasd_eckd_read_message_buffer(struct dasd_device *device, 50845db8440cSStefan Haberland struct dasd_rssd_messages *messages, 50855db8440cSStefan Haberland __u8 lpum) 50865db8440cSStefan Haberland { 50875db8440cSStefan Haberland struct dasd_rssd_messages *message_buf; 50885db8440cSStefan Haberland struct dasd_psf_prssd_data *prssdp; 50895db8440cSStefan Haberland struct dasd_ccw_req *cqr; 50905db8440cSStefan Haberland struct ccw1 *ccw; 50915db8440cSStefan Haberland int rc; 50925db8440cSStefan Haberland 50935db8440cSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 50945db8440cSStefan Haberland (sizeof(struct dasd_psf_prssd_data) + 50955db8440cSStefan Haberland sizeof(struct dasd_rssd_messages)), 50965db8440cSStefan Haberland device); 50975db8440cSStefan Haberland if (IS_ERR(cqr)) { 50985db8440cSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 50995db8440cSStefan Haberland "Could not allocate read message buffer request"); 51005db8440cSStefan Haberland return PTR_ERR(cqr); 51015db8440cSStefan Haberland } 51025db8440cSStefan Haberland 5103af775210SStefan Haberland cqr->lpm = lpum; 5104af775210SStefan Haberland retry: 51055db8440cSStefan Haberland cqr->startdev = device; 51065db8440cSStefan Haberland cqr->memdev = device; 51075db8440cSStefan Haberland cqr->block = NULL; 51085db8440cSStefan Haberland cqr->expires = 10 * HZ; 51095db8440cSStefan Haberland set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 5110b179b037SStefan Haberland /* dasd_sleep_on_immediatly does not do complex error 5111b179b037SStefan Haberland * recovery so clear erp flag and set retry counter to 5112b179b037SStefan Haberland * do basic erp */ 5113b179b037SStefan Haberland clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 5114b179b037SStefan Haberland cqr->retries = 256; 51155db8440cSStefan Haberland 51165db8440cSStefan Haberland /* Prepare for Read Subsystem Data */ 51175db8440cSStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 51185db8440cSStefan Haberland memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 51195db8440cSStefan Haberland prssdp->order = PSF_ORDER_PRSSD; 51205db8440cSStefan Haberland prssdp->suborder = 0x03; /* Message Buffer */ 51215db8440cSStefan Haberland /* all other bytes of prssdp must be zero */ 51225db8440cSStefan Haberland 51235db8440cSStefan Haberland ccw = cqr->cpaddr; 51245db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 51255db8440cSStefan Haberland ccw->count = sizeof(struct dasd_psf_prssd_data); 51265db8440cSStefan Haberland ccw->flags |= CCW_FLAG_CC; 51275db8440cSStefan Haberland ccw->flags |= CCW_FLAG_SLI; 51285db8440cSStefan Haberland ccw->cda = (__u32)(addr_t) prssdp; 51295db8440cSStefan Haberland 51305db8440cSStefan Haberland /* Read Subsystem Data - message buffer */ 51315db8440cSStefan Haberland message_buf = (struct dasd_rssd_messages *) (prssdp + 1); 51325db8440cSStefan Haberland memset(message_buf, 0, sizeof(struct dasd_rssd_messages)); 51335db8440cSStefan Haberland 51345db8440cSStefan Haberland ccw++; 51355db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_RSSD; 51365db8440cSStefan Haberland ccw->count = sizeof(struct dasd_rssd_messages); 51375db8440cSStefan Haberland ccw->flags |= CCW_FLAG_SLI; 51385db8440cSStefan Haberland ccw->cda = (__u32)(addr_t) message_buf; 51395db8440cSStefan Haberland 51405db8440cSStefan Haberland cqr->buildclk = get_tod_clock(); 51415db8440cSStefan Haberland cqr->status = DASD_CQR_FILLED; 51425db8440cSStefan Haberland rc = dasd_sleep_on_immediatly(cqr); 51435db8440cSStefan Haberland if (rc == 0) { 51445db8440cSStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 51455db8440cSStefan Haberland message_buf = (struct dasd_rssd_messages *) 51465db8440cSStefan Haberland (prssdp + 1); 51475db8440cSStefan Haberland memcpy(messages, message_buf, 51485db8440cSStefan Haberland sizeof(struct dasd_rssd_messages)); 5149af775210SStefan Haberland } else if (cqr->lpm) { 5150af775210SStefan Haberland /* 5151af775210SStefan Haberland * on z/VM we might not be able to do I/O on the requested path 5152af775210SStefan Haberland * but instead we get the required information on any path 5153af775210SStefan Haberland * so retry with open path mask 5154af775210SStefan Haberland */ 5155af775210SStefan Haberland cqr->lpm = 0; 5156af775210SStefan Haberland goto retry; 51575db8440cSStefan Haberland } else 51585db8440cSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 51595db8440cSStefan Haberland "Reading messages failed with rc=%d\n" 51605db8440cSStefan Haberland , rc); 51615db8440cSStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 51625db8440cSStefan Haberland return rc; 51635db8440cSStefan Haberland } 51645db8440cSStefan Haberland 51655a3b7b11SStefan Haberland static int dasd_eckd_query_host_access(struct dasd_device *device, 51665a3b7b11SStefan Haberland struct dasd_psf_query_host_access *data) 51675a3b7b11SStefan Haberland { 51685a3b7b11SStefan Haberland struct dasd_eckd_private *private = device->private; 51695a3b7b11SStefan Haberland struct dasd_psf_query_host_access *host_access; 51705a3b7b11SStefan Haberland struct dasd_psf_prssd_data *prssdp; 51715a3b7b11SStefan Haberland struct dasd_ccw_req *cqr; 51725a3b7b11SStefan Haberland struct ccw1 *ccw; 51735a3b7b11SStefan Haberland int rc; 51745a3b7b11SStefan Haberland 51755a3b7b11SStefan Haberland /* not available for HYPER PAV alias devices */ 51765a3b7b11SStefan Haberland if (!device->block && private->lcu->pav == HYPER_PAV) 51775a3b7b11SStefan Haberland return -EOPNOTSUPP; 51785a3b7b11SStefan Haberland 5179ccd53fa2SStefan Haberland /* may not be supported by the storage server */ 5180ccd53fa2SStefan Haberland if (!(private->features.feature[14] & 0x80)) 5181ccd53fa2SStefan Haberland return -EOPNOTSUPP; 5182ccd53fa2SStefan Haberland 51835a3b7b11SStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 51845a3b7b11SStefan Haberland sizeof(struct dasd_psf_prssd_data) + 1, 51855a3b7b11SStefan Haberland device); 51865a3b7b11SStefan Haberland if (IS_ERR(cqr)) { 51875a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 51885a3b7b11SStefan Haberland "Could not allocate read message buffer request"); 51895a3b7b11SStefan Haberland return PTR_ERR(cqr); 51905a3b7b11SStefan Haberland } 51915a3b7b11SStefan Haberland host_access = kzalloc(sizeof(*host_access), GFP_KERNEL | GFP_DMA); 51925a3b7b11SStefan Haberland if (!host_access) { 51935a3b7b11SStefan Haberland dasd_sfree_request(cqr, device); 51945a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 51955a3b7b11SStefan Haberland "Could not allocate host_access buffer"); 51965a3b7b11SStefan Haberland return -ENOMEM; 51975a3b7b11SStefan Haberland } 51985a3b7b11SStefan Haberland cqr->startdev = device; 51995a3b7b11SStefan Haberland cqr->memdev = device; 52005a3b7b11SStefan Haberland cqr->block = NULL; 52015a3b7b11SStefan Haberland cqr->retries = 256; 52025a3b7b11SStefan Haberland cqr->expires = 10 * HZ; 52035a3b7b11SStefan Haberland 52045a3b7b11SStefan Haberland /* Prepare for Read Subsystem Data */ 52055a3b7b11SStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 52065a3b7b11SStefan Haberland memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 52075a3b7b11SStefan Haberland prssdp->order = PSF_ORDER_PRSSD; 52085a3b7b11SStefan Haberland prssdp->suborder = PSF_SUBORDER_QHA; /* query host access */ 52095a3b7b11SStefan Haberland /* LSS and Volume that will be queried */ 52105a3b7b11SStefan Haberland prssdp->lss = private->ned->ID; 52115a3b7b11SStefan Haberland prssdp->volume = private->ned->unit_addr; 52125a3b7b11SStefan Haberland /* all other bytes of prssdp must be zero */ 52135a3b7b11SStefan Haberland 52145a3b7b11SStefan Haberland ccw = cqr->cpaddr; 52155a3b7b11SStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 52165a3b7b11SStefan Haberland ccw->count = sizeof(struct dasd_psf_prssd_data); 52175a3b7b11SStefan Haberland ccw->flags |= CCW_FLAG_CC; 52185a3b7b11SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 52195a3b7b11SStefan Haberland ccw->cda = (__u32)(addr_t) prssdp; 52205a3b7b11SStefan Haberland 52215a3b7b11SStefan Haberland /* Read Subsystem Data - query host access */ 52225a3b7b11SStefan Haberland ccw++; 52235a3b7b11SStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_RSSD; 52245a3b7b11SStefan Haberland ccw->count = sizeof(struct dasd_psf_query_host_access); 52255a3b7b11SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 52265a3b7b11SStefan Haberland ccw->cda = (__u32)(addr_t) host_access; 52275a3b7b11SStefan Haberland 52285a3b7b11SStefan Haberland cqr->buildclk = get_tod_clock(); 52295a3b7b11SStefan Haberland cqr->status = DASD_CQR_FILLED; 5230ab24fbd3SStefan Haberland /* the command might not be supported, suppress error message */ 5231ab24fbd3SStefan Haberland __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); 5232f50af850SStefan Haberland rc = dasd_sleep_on_interruptible(cqr); 52335a3b7b11SStefan Haberland if (rc == 0) { 52345a3b7b11SStefan Haberland *data = *host_access; 52355a3b7b11SStefan Haberland } else { 52365a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 52375a3b7b11SStefan Haberland "Reading host access data failed with rc=%d\n", 52385a3b7b11SStefan Haberland rc); 52395a3b7b11SStefan Haberland rc = -EOPNOTSUPP; 52405a3b7b11SStefan Haberland } 52415a3b7b11SStefan Haberland 52425a3b7b11SStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 52435a3b7b11SStefan Haberland kfree(host_access); 52445a3b7b11SStefan Haberland return rc; 52455a3b7b11SStefan Haberland } 52465a3b7b11SStefan Haberland /* 52475a3b7b11SStefan Haberland * return number of grouped devices 52485a3b7b11SStefan Haberland */ 52495a3b7b11SStefan Haberland static int dasd_eckd_host_access_count(struct dasd_device *device) 52505a3b7b11SStefan Haberland { 52515a3b7b11SStefan Haberland struct dasd_psf_query_host_access *access; 52525a3b7b11SStefan Haberland struct dasd_ckd_path_group_entry *entry; 52535a3b7b11SStefan Haberland struct dasd_ckd_host_information *info; 52545a3b7b11SStefan Haberland int count = 0; 52555a3b7b11SStefan Haberland int rc, i; 52565a3b7b11SStefan Haberland 52575a3b7b11SStefan Haberland access = kzalloc(sizeof(*access), GFP_NOIO); 52585a3b7b11SStefan Haberland if (!access) { 52595a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 52605a3b7b11SStefan Haberland "Could not allocate access buffer"); 52615a3b7b11SStefan Haberland return -ENOMEM; 52625a3b7b11SStefan Haberland } 52635a3b7b11SStefan Haberland rc = dasd_eckd_query_host_access(device, access); 52645a3b7b11SStefan Haberland if (rc) { 52655a3b7b11SStefan Haberland kfree(access); 52665a3b7b11SStefan Haberland return rc; 52675a3b7b11SStefan Haberland } 52685a3b7b11SStefan Haberland 52695a3b7b11SStefan Haberland info = (struct dasd_ckd_host_information *) 52705a3b7b11SStefan Haberland access->host_access_information; 52715a3b7b11SStefan Haberland for (i = 0; i < info->entry_count; i++) { 52725a3b7b11SStefan Haberland entry = (struct dasd_ckd_path_group_entry *) 52735a3b7b11SStefan Haberland (info->entry + i * info->entry_size); 52745a3b7b11SStefan Haberland if (entry->status_flags & DASD_ECKD_PG_GROUPED) 52755a3b7b11SStefan Haberland count++; 52765a3b7b11SStefan Haberland } 52775a3b7b11SStefan Haberland 52785a3b7b11SStefan Haberland kfree(access); 52795a3b7b11SStefan Haberland return count; 52805a3b7b11SStefan Haberland } 52815a3b7b11SStefan Haberland 52825a3b7b11SStefan Haberland /* 52835a3b7b11SStefan Haberland * write host access information to a sequential file 52845a3b7b11SStefan Haberland */ 52855a3b7b11SStefan Haberland static int dasd_hosts_print(struct dasd_device *device, struct seq_file *m) 52865a3b7b11SStefan Haberland { 52875a3b7b11SStefan Haberland struct dasd_psf_query_host_access *access; 52885a3b7b11SStefan Haberland struct dasd_ckd_path_group_entry *entry; 52895a3b7b11SStefan Haberland struct dasd_ckd_host_information *info; 52905a3b7b11SStefan Haberland char sysplex[9] = ""; 52915a3b7b11SStefan Haberland int rc, i, j; 52925a3b7b11SStefan Haberland 52935a3b7b11SStefan Haberland access = kzalloc(sizeof(*access), GFP_NOIO); 52945a3b7b11SStefan Haberland if (!access) { 52955a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 52965a3b7b11SStefan Haberland "Could not allocate access buffer"); 52975a3b7b11SStefan Haberland return -ENOMEM; 52985a3b7b11SStefan Haberland } 52995a3b7b11SStefan Haberland rc = dasd_eckd_query_host_access(device, access); 53005a3b7b11SStefan Haberland if (rc) { 53015a3b7b11SStefan Haberland kfree(access); 53025a3b7b11SStefan Haberland return rc; 53035a3b7b11SStefan Haberland } 53045a3b7b11SStefan Haberland 53055a3b7b11SStefan Haberland info = (struct dasd_ckd_host_information *) 53065a3b7b11SStefan Haberland access->host_access_information; 53075a3b7b11SStefan Haberland for (i = 0; i < info->entry_count; i++) { 53085a3b7b11SStefan Haberland entry = (struct dasd_ckd_path_group_entry *) 53095a3b7b11SStefan Haberland (info->entry + i * info->entry_size); 53105a3b7b11SStefan Haberland /* PGID */ 53115a3b7b11SStefan Haberland seq_puts(m, "pgid "); 53125a3b7b11SStefan Haberland for (j = 0; j < 11; j++) 53135a3b7b11SStefan Haberland seq_printf(m, "%02x", entry->pgid[j]); 53145a3b7b11SStefan Haberland seq_putc(m, '\n'); 53155a3b7b11SStefan Haberland /* FLAGS */ 53165a3b7b11SStefan Haberland seq_printf(m, "status_flags %02x\n", entry->status_flags); 53175a3b7b11SStefan Haberland /* SYSPLEX NAME */ 53185a3b7b11SStefan Haberland memcpy(&sysplex, &entry->sysplex_name, sizeof(sysplex) - 1); 53195a3b7b11SStefan Haberland EBCASC(sysplex, sizeof(sysplex)); 53205a3b7b11SStefan Haberland seq_printf(m, "sysplex_name %8s\n", sysplex); 53215a3b7b11SStefan Haberland /* SUPPORTED CYLINDER */ 53225a3b7b11SStefan Haberland seq_printf(m, "supported_cylinder %d\n", entry->cylinder); 53235a3b7b11SStefan Haberland /* TIMESTAMP */ 53245a3b7b11SStefan Haberland seq_printf(m, "timestamp %lu\n", (unsigned long) 53255a3b7b11SStefan Haberland entry->timestamp); 53265a3b7b11SStefan Haberland } 53275a3b7b11SStefan Haberland kfree(access); 53285a3b7b11SStefan Haberland 53295a3b7b11SStefan Haberland return 0; 53305a3b7b11SStefan Haberland } 53315a3b7b11SStefan Haberland 53325db8440cSStefan Haberland /* 53335db8440cSStefan Haberland * Perform Subsystem Function - CUIR response 53345db8440cSStefan Haberland */ 53355db8440cSStefan Haberland static int 53365db8440cSStefan Haberland dasd_eckd_psf_cuir_response(struct dasd_device *device, int response, 5337a521b048SStefan Haberland __u32 message_id, __u8 lpum) 53385db8440cSStefan Haberland { 53395db8440cSStefan Haberland struct dasd_psf_cuir_response *psf_cuir; 5340a521b048SStefan Haberland int pos = pathmask_to_pos(lpum); 53415db8440cSStefan Haberland struct dasd_ccw_req *cqr; 53425db8440cSStefan Haberland struct ccw1 *ccw; 53435db8440cSStefan Haberland int rc; 53445db8440cSStefan Haberland 53455db8440cSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 53465db8440cSStefan Haberland sizeof(struct dasd_psf_cuir_response), 53475db8440cSStefan Haberland device); 53485db8440cSStefan Haberland 53495db8440cSStefan Haberland if (IS_ERR(cqr)) { 53505db8440cSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 53515db8440cSStefan Haberland "Could not allocate PSF-CUIR request"); 53525db8440cSStefan Haberland return PTR_ERR(cqr); 53535db8440cSStefan Haberland } 53545db8440cSStefan Haberland 53555db8440cSStefan Haberland psf_cuir = (struct dasd_psf_cuir_response *)cqr->data; 53565db8440cSStefan Haberland psf_cuir->order = PSF_ORDER_CUIR_RESPONSE; 53575db8440cSStefan Haberland psf_cuir->cc = response; 5358a521b048SStefan Haberland psf_cuir->chpid = device->path[pos].chpid; 53595db8440cSStefan Haberland psf_cuir->message_id = message_id; 5360a521b048SStefan Haberland psf_cuir->cssid = device->path[pos].cssid; 5361a521b048SStefan Haberland psf_cuir->ssid = device->path[pos].ssid; 53625db8440cSStefan Haberland ccw = cqr->cpaddr; 53635db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 53645db8440cSStefan Haberland ccw->cda = (__u32)(addr_t)psf_cuir; 5365b179b037SStefan Haberland ccw->flags = CCW_FLAG_SLI; 53665db8440cSStefan Haberland ccw->count = sizeof(struct dasd_psf_cuir_response); 53675db8440cSStefan Haberland 53685db8440cSStefan Haberland cqr->startdev = device; 53695db8440cSStefan Haberland cqr->memdev = device; 53705db8440cSStefan Haberland cqr->block = NULL; 53715db8440cSStefan Haberland cqr->retries = 256; 53725db8440cSStefan Haberland cqr->expires = 10*HZ; 53735db8440cSStefan Haberland cqr->buildclk = get_tod_clock(); 53745db8440cSStefan Haberland cqr->status = DASD_CQR_FILLED; 5375b179b037SStefan Haberland set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 53765db8440cSStefan Haberland 53775db8440cSStefan Haberland rc = dasd_sleep_on(cqr); 53785db8440cSStefan Haberland 53795db8440cSStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 53805db8440cSStefan Haberland return rc; 53815db8440cSStefan Haberland } 53825db8440cSStefan Haberland 5383b179b037SStefan Haberland /* 5384b179b037SStefan Haberland * return configuration data that is referenced by record selector 5385b179b037SStefan Haberland * if a record selector is specified or per default return the 5386b179b037SStefan Haberland * conf_data pointer for the path specified by lpum 5387b179b037SStefan Haberland */ 5388b179b037SStefan Haberland static struct dasd_conf_data *dasd_eckd_get_ref_conf(struct dasd_device *device, 5389b179b037SStefan Haberland __u8 lpum, 5390b179b037SStefan Haberland struct dasd_cuir_message *cuir) 53915db8440cSStefan Haberland { 5392b179b037SStefan Haberland struct dasd_conf_data *conf_data; 5393b179b037SStefan Haberland int path, pos; 53945db8440cSStefan Haberland 5395b179b037SStefan Haberland if (cuir->record_selector == 0) 5396b179b037SStefan Haberland goto out; 5397b179b037SStefan Haberland for (path = 0x80, pos = 0; path; path >>= 1, pos++) { 5398c9346151SStefan Haberland conf_data = device->path[pos].conf_data; 5399b179b037SStefan Haberland if (conf_data->gneq.record_selector == 5400b179b037SStefan Haberland cuir->record_selector) 5401b179b037SStefan Haberland return conf_data; 54025db8440cSStefan Haberland } 5403b179b037SStefan Haberland out: 5404c9346151SStefan Haberland return device->path[pathmask_to_pos(lpum)].conf_data; 54055db8440cSStefan Haberland } 54065db8440cSStefan Haberland 54075db8440cSStefan Haberland /* 5408b179b037SStefan Haberland * This function determines the scope of a reconfiguration request by 5409b179b037SStefan Haberland * analysing the path and device selection data provided in the CUIR request. 5410b179b037SStefan Haberland * Returns a path mask containing CUIR affected paths for the give device. 5411b179b037SStefan Haberland * 5412b179b037SStefan Haberland * If the CUIR request does not contain the required information return the 5413b179b037SStefan Haberland * path mask of the path the attention message for the CUIR request was reveived 5414b179b037SStefan Haberland * on. 5415b179b037SStefan Haberland */ 5416b179b037SStefan Haberland static int dasd_eckd_cuir_scope(struct dasd_device *device, __u8 lpum, 5417b179b037SStefan Haberland struct dasd_cuir_message *cuir) 5418b179b037SStefan Haberland { 5419b179b037SStefan Haberland struct dasd_conf_data *ref_conf_data; 5420b179b037SStefan Haberland unsigned long bitmask = 0, mask = 0; 5421b179b037SStefan Haberland struct dasd_conf_data *conf_data; 5422b179b037SStefan Haberland unsigned int pos, path; 5423b179b037SStefan Haberland char *ref_gneq, *gneq; 5424b179b037SStefan Haberland char *ref_ned, *ned; 5425b179b037SStefan Haberland int tbcpm = 0; 5426b179b037SStefan Haberland 5427b179b037SStefan Haberland /* if CUIR request does not specify the scope use the path 5428b179b037SStefan Haberland the attention message was presented on */ 5429b179b037SStefan Haberland if (!cuir->ned_map || 5430b179b037SStefan Haberland !(cuir->neq_map[0] | cuir->neq_map[1] | cuir->neq_map[2])) 5431b179b037SStefan Haberland return lpum; 5432b179b037SStefan Haberland 5433b179b037SStefan Haberland /* get reference conf data */ 5434b179b037SStefan Haberland ref_conf_data = dasd_eckd_get_ref_conf(device, lpum, cuir); 5435b179b037SStefan Haberland /* reference ned is determined by ned_map field */ 5436b179b037SStefan Haberland pos = 8 - ffs(cuir->ned_map); 5437b179b037SStefan Haberland ref_ned = (char *)&ref_conf_data->neds[pos]; 5438b179b037SStefan Haberland ref_gneq = (char *)&ref_conf_data->gneq; 5439b179b037SStefan Haberland /* transfer 24 bit neq_map to mask */ 5440b179b037SStefan Haberland mask = cuir->neq_map[2]; 5441b179b037SStefan Haberland mask |= cuir->neq_map[1] << 8; 5442b179b037SStefan Haberland mask |= cuir->neq_map[0] << 16; 5443b179b037SStefan Haberland 5444c9346151SStefan Haberland for (path = 0; path < 8; path++) { 5445b179b037SStefan Haberland /* initialise data per path */ 5446b179b037SStefan Haberland bitmask = mask; 5447c9346151SStefan Haberland conf_data = device->path[path].conf_data; 5448b179b037SStefan Haberland pos = 8 - ffs(cuir->ned_map); 5449b179b037SStefan Haberland ned = (char *) &conf_data->neds[pos]; 5450b179b037SStefan Haberland /* compare reference ned and per path ned */ 5451b179b037SStefan Haberland if (memcmp(ref_ned, ned, sizeof(*ned)) != 0) 5452b179b037SStefan Haberland continue; 5453b179b037SStefan Haberland gneq = (char *)&conf_data->gneq; 5454b179b037SStefan Haberland /* compare reference gneq and per_path gneq under 5455b179b037SStefan Haberland 24 bit mask where mask bit 0 equals byte 7 of 5456b179b037SStefan Haberland the gneq and mask bit 24 equals byte 31 */ 5457b179b037SStefan Haberland while (bitmask) { 5458b179b037SStefan Haberland pos = ffs(bitmask) - 1; 5459b179b037SStefan Haberland if (memcmp(&ref_gneq[31 - pos], &gneq[31 - pos], 1) 5460b179b037SStefan Haberland != 0) 5461b179b037SStefan Haberland break; 5462b179b037SStefan Haberland clear_bit(pos, &bitmask); 5463b179b037SStefan Haberland } 5464b179b037SStefan Haberland if (bitmask) 5465b179b037SStefan Haberland continue; 5466b179b037SStefan Haberland /* device and path match the reference values 5467b179b037SStefan Haberland add path to CUIR scope */ 5468c9346151SStefan Haberland tbcpm |= 0x80 >> path; 5469b179b037SStefan Haberland } 5470b179b037SStefan Haberland return tbcpm; 5471b179b037SStefan Haberland } 5472b179b037SStefan Haberland 5473b179b037SStefan Haberland static void dasd_eckd_cuir_notify_user(struct dasd_device *device, 5474a521b048SStefan Haberland unsigned long paths, int action) 5475b179b037SStefan Haberland { 5476b179b037SStefan Haberland int pos; 5477b179b037SStefan Haberland 5478b179b037SStefan Haberland while (paths) { 5479b179b037SStefan Haberland /* get position of bit in mask */ 5480a521b048SStefan Haberland pos = 8 - ffs(paths); 5481b179b037SStefan Haberland /* get channel path descriptor from this position */ 5482b179b037SStefan Haberland if (action == CUIR_QUIESCE) 5483a521b048SStefan Haberland pr_warn("Service on the storage server caused path %x.%02x to go offline", 5484a521b048SStefan Haberland device->path[pos].cssid, 5485a521b048SStefan Haberland device->path[pos].chpid); 5486b179b037SStefan Haberland else if (action == CUIR_RESUME) 5487a521b048SStefan Haberland pr_info("Path %x.%02x is back online after service on the storage server", 5488a521b048SStefan Haberland device->path[pos].cssid, 5489a521b048SStefan Haberland device->path[pos].chpid); 5490a521b048SStefan Haberland clear_bit(7 - pos, &paths); 5491b179b037SStefan Haberland } 5492b179b037SStefan Haberland } 5493b179b037SStefan Haberland 5494b179b037SStefan Haberland static int dasd_eckd_cuir_remove_path(struct dasd_device *device, __u8 lpum, 5495b179b037SStefan Haberland struct dasd_cuir_message *cuir) 5496b179b037SStefan Haberland { 5497b179b037SStefan Haberland unsigned long tbcpm; 5498b179b037SStefan Haberland 5499b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(device, lpum, cuir); 5500b179b037SStefan Haberland /* nothing to do if path is not in use */ 5501c9346151SStefan Haberland if (!(dasd_path_get_opm(device) & tbcpm)) 5502b179b037SStefan Haberland return 0; 5503c9346151SStefan Haberland if (!(dasd_path_get_opm(device) & ~tbcpm)) { 5504b179b037SStefan Haberland /* no path would be left if the CUIR action is taken 5505b179b037SStefan Haberland return error */ 5506b179b037SStefan Haberland return -EINVAL; 5507b179b037SStefan Haberland } 5508b179b037SStefan Haberland /* remove device from operational path mask */ 5509c9346151SStefan Haberland dasd_path_remove_opm(device, tbcpm); 5510c9346151SStefan Haberland dasd_path_add_cuirpm(device, tbcpm); 5511b179b037SStefan Haberland return tbcpm; 5512b179b037SStefan Haberland } 5513b179b037SStefan Haberland 5514b179b037SStefan Haberland /* 5515b179b037SStefan Haberland * walk through all devices and build a path mask to quiesce them 5516b179b037SStefan Haberland * return an error if the last path to a device would be removed 55175db8440cSStefan Haberland * 55185db8440cSStefan Haberland * if only part of the devices are quiesced and an error 55195db8440cSStefan Haberland * occurs no onlining necessary, the storage server will 55205db8440cSStefan Haberland * notify the already set offline devices again 55215db8440cSStefan Haberland */ 55225db8440cSStefan Haberland static int dasd_eckd_cuir_quiesce(struct dasd_device *device, __u8 lpum, 5523b179b037SStefan Haberland struct dasd_cuir_message *cuir) 55245db8440cSStefan Haberland { 5525543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 55265db8440cSStefan Haberland struct alias_pav_group *pavgroup, *tempgroup; 55275db8440cSStefan Haberland struct dasd_device *dev, *n; 5528b179b037SStefan Haberland unsigned long paths = 0; 5529b179b037SStefan Haberland unsigned long flags; 5530b179b037SStefan Haberland int tbcpm; 55315db8440cSStefan Haberland 55325db8440cSStefan Haberland /* active devices */ 5533b179b037SStefan Haberland list_for_each_entry_safe(dev, n, &private->lcu->active_devices, 55345db8440cSStefan Haberland alias_list) { 5535b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 5536b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 5537b179b037SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); 5538b179b037SStefan Haberland if (tbcpm < 0) 5539b179b037SStefan Haberland goto out_err; 5540b179b037SStefan Haberland paths |= tbcpm; 55415db8440cSStefan Haberland } 55425db8440cSStefan Haberland /* inactive devices */ 5543b179b037SStefan Haberland list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices, 55445db8440cSStefan Haberland alias_list) { 5545b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 5546b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 5547b179b037SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); 5548b179b037SStefan Haberland if (tbcpm < 0) 5549b179b037SStefan Haberland goto out_err; 5550b179b037SStefan Haberland paths |= tbcpm; 55515db8440cSStefan Haberland } 55525db8440cSStefan Haberland /* devices in PAV groups */ 55535db8440cSStefan Haberland list_for_each_entry_safe(pavgroup, tempgroup, 55545db8440cSStefan Haberland &private->lcu->grouplist, group) { 55555db8440cSStefan Haberland list_for_each_entry_safe(dev, n, &pavgroup->baselist, 55565db8440cSStefan Haberland alias_list) { 5557b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 5558b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 5559b179b037SStefan Haberland spin_unlock_irqrestore( 5560b179b037SStefan Haberland get_ccwdev_lock(dev->cdev), flags); 5561b179b037SStefan Haberland if (tbcpm < 0) 5562b179b037SStefan Haberland goto out_err; 5563b179b037SStefan Haberland paths |= tbcpm; 55645db8440cSStefan Haberland } 55655db8440cSStefan Haberland list_for_each_entry_safe(dev, n, &pavgroup->aliaslist, 55665db8440cSStefan Haberland alias_list) { 5567b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 5568b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 5569b179b037SStefan Haberland spin_unlock_irqrestore( 5570b179b037SStefan Haberland get_ccwdev_lock(dev->cdev), flags); 5571b179b037SStefan Haberland if (tbcpm < 0) 5572b179b037SStefan Haberland goto out_err; 5573b179b037SStefan Haberland paths |= tbcpm; 55745db8440cSStefan Haberland } 55755db8440cSStefan Haberland } 5576b179b037SStefan Haberland /* notify user about all paths affected by CUIR action */ 5577a521b048SStefan Haberland dasd_eckd_cuir_notify_user(device, paths, CUIR_QUIESCE); 5578b179b037SStefan Haberland return 0; 5579b179b037SStefan Haberland out_err: 5580b179b037SStefan Haberland return tbcpm; 55815db8440cSStefan Haberland } 55825db8440cSStefan Haberland 55835db8440cSStefan Haberland static int dasd_eckd_cuir_resume(struct dasd_device *device, __u8 lpum, 5584b179b037SStefan Haberland struct dasd_cuir_message *cuir) 55855db8440cSStefan Haberland { 5586543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 55875db8440cSStefan Haberland struct alias_pav_group *pavgroup, *tempgroup; 55885db8440cSStefan Haberland struct dasd_device *dev, *n; 5589b179b037SStefan Haberland unsigned long paths = 0; 5590b179b037SStefan Haberland int tbcpm; 55915db8440cSStefan Haberland 55925db8440cSStefan Haberland /* 55935db8440cSStefan Haberland * the path may have been added through a generic path event before 55945db8440cSStefan Haberland * only trigger path verification if the path is not already in use 55955db8440cSStefan Haberland */ 55965db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 55975db8440cSStefan Haberland &private->lcu->active_devices, 55985db8440cSStefan Haberland alias_list) { 5599b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 5600b179b037SStefan Haberland paths |= tbcpm; 5601c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 5602c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 56035db8440cSStefan Haberland dasd_schedule_device_bh(dev); 56045db8440cSStefan Haberland } 56055db8440cSStefan Haberland } 56065db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 56075db8440cSStefan Haberland &private->lcu->inactive_devices, 56085db8440cSStefan Haberland alias_list) { 5609b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 5610b179b037SStefan Haberland paths |= tbcpm; 5611c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 5612c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 56135db8440cSStefan Haberland dasd_schedule_device_bh(dev); 56145db8440cSStefan Haberland } 56155db8440cSStefan Haberland } 56165db8440cSStefan Haberland /* devices in PAV groups */ 56175db8440cSStefan Haberland list_for_each_entry_safe(pavgroup, tempgroup, 56185db8440cSStefan Haberland &private->lcu->grouplist, 56195db8440cSStefan Haberland group) { 56205db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 56215db8440cSStefan Haberland &pavgroup->baselist, 56225db8440cSStefan Haberland alias_list) { 5623b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 5624b179b037SStefan Haberland paths |= tbcpm; 5625c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 5626c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 56275db8440cSStefan Haberland dasd_schedule_device_bh(dev); 56285db8440cSStefan Haberland } 56295db8440cSStefan Haberland } 56305db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 56315db8440cSStefan Haberland &pavgroup->aliaslist, 56325db8440cSStefan Haberland alias_list) { 5633b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 5634b179b037SStefan Haberland paths |= tbcpm; 5635c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 5636c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 56375db8440cSStefan Haberland dasd_schedule_device_bh(dev); 56385db8440cSStefan Haberland } 56395db8440cSStefan Haberland } 56405db8440cSStefan Haberland } 5641b179b037SStefan Haberland /* notify user about all paths affected by CUIR action */ 5642a521b048SStefan Haberland dasd_eckd_cuir_notify_user(device, paths, CUIR_RESUME); 5643b179b037SStefan Haberland return 0; 56445db8440cSStefan Haberland } 56455db8440cSStefan Haberland 56465db8440cSStefan Haberland static void dasd_eckd_handle_cuir(struct dasd_device *device, void *messages, 56475db8440cSStefan Haberland __u8 lpum) 56485db8440cSStefan Haberland { 56495db8440cSStefan Haberland struct dasd_cuir_message *cuir = messages; 5650a521b048SStefan Haberland int response; 56515db8440cSStefan Haberland 5652b179b037SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, 5653b179b037SStefan Haberland "CUIR request: %016llx %016llx %016llx %08x", 5654b179b037SStefan Haberland ((u64 *)cuir)[0], ((u64 *)cuir)[1], ((u64 *)cuir)[2], 5655b179b037SStefan Haberland ((u32 *)cuir)[3]); 56565db8440cSStefan Haberland 56575db8440cSStefan Haberland if (cuir->code == CUIR_QUIESCE) { 56585db8440cSStefan Haberland /* quiesce */ 5659a521b048SStefan Haberland if (dasd_eckd_cuir_quiesce(device, lpum, cuir)) 5660b179b037SStefan Haberland response = PSF_CUIR_LAST_PATH; 5661b179b037SStefan Haberland else 5662b179b037SStefan Haberland response = PSF_CUIR_COMPLETED; 56635db8440cSStefan Haberland } else if (cuir->code == CUIR_RESUME) { 56645db8440cSStefan Haberland /* resume */ 5665a521b048SStefan Haberland dasd_eckd_cuir_resume(device, lpum, cuir); 5666b179b037SStefan Haberland response = PSF_CUIR_COMPLETED; 56675db8440cSStefan Haberland } else 56685db8440cSStefan Haberland response = PSF_CUIR_NOT_SUPPORTED; 56695db8440cSStefan Haberland 5670b179b037SStefan Haberland dasd_eckd_psf_cuir_response(device, response, 5671a521b048SStefan Haberland cuir->message_id, lpum); 5672b179b037SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, 5673b179b037SStefan Haberland "CUIR response: %d on message ID %08x", response, 5674b179b037SStefan Haberland cuir->message_id); 5675b179b037SStefan Haberland /* to make sure there is no attention left schedule work again */ 5676b179b037SStefan Haberland device->discipline->check_attention(device, lpum); 56775db8440cSStefan Haberland } 56785db8440cSStefan Haberland 56795db8440cSStefan Haberland static void dasd_eckd_check_attention_work(struct work_struct *work) 56805db8440cSStefan Haberland { 56815db8440cSStefan Haberland struct check_attention_work_data *data; 56825db8440cSStefan Haberland struct dasd_rssd_messages *messages; 56835db8440cSStefan Haberland struct dasd_device *device; 56845db8440cSStefan Haberland int rc; 56855db8440cSStefan Haberland 56865db8440cSStefan Haberland data = container_of(work, struct check_attention_work_data, worker); 56875db8440cSStefan Haberland device = data->device; 56885db8440cSStefan Haberland messages = kzalloc(sizeof(*messages), GFP_KERNEL); 56895db8440cSStefan Haberland if (!messages) { 56905db8440cSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 56915db8440cSStefan Haberland "Could not allocate attention message buffer"); 56925db8440cSStefan Haberland goto out; 56935db8440cSStefan Haberland } 56945db8440cSStefan Haberland rc = dasd_eckd_read_message_buffer(device, messages, data->lpum); 56955db8440cSStefan Haberland if (rc) 56965db8440cSStefan Haberland goto out; 56975db8440cSStefan Haberland if (messages->length == ATTENTION_LENGTH_CUIR && 56985db8440cSStefan Haberland messages->format == ATTENTION_FORMAT_CUIR) 56995db8440cSStefan Haberland dasd_eckd_handle_cuir(device, messages, data->lpum); 57005db8440cSStefan Haberland out: 57015db8440cSStefan Haberland dasd_put_device(device); 57025db8440cSStefan Haberland kfree(messages); 57035db8440cSStefan Haberland kfree(data); 57045db8440cSStefan Haberland } 57055db8440cSStefan Haberland 57065db8440cSStefan Haberland static int dasd_eckd_check_attention(struct dasd_device *device, __u8 lpum) 57075db8440cSStefan Haberland { 57085db8440cSStefan Haberland struct check_attention_work_data *data; 57095db8440cSStefan Haberland 57105db8440cSStefan Haberland data = kzalloc(sizeof(*data), GFP_ATOMIC); 57115db8440cSStefan Haberland if (!data) 57125db8440cSStefan Haberland return -ENOMEM; 57135db8440cSStefan Haberland INIT_WORK(&data->worker, dasd_eckd_check_attention_work); 57145db8440cSStefan Haberland dasd_get_device(device); 57155db8440cSStefan Haberland data->device = device; 57165db8440cSStefan Haberland data->lpum = lpum; 57175db8440cSStefan Haberland schedule_work(&data->worker); 57185db8440cSStefan Haberland return 0; 57195db8440cSStefan Haberland } 57205db8440cSStefan Haberland 5721a521b048SStefan Haberland static int dasd_eckd_disable_hpf_path(struct dasd_device *device, __u8 lpum) 5722a521b048SStefan Haberland { 5723a521b048SStefan Haberland if (~lpum & dasd_path_get_opm(device)) { 5724a521b048SStefan Haberland dasd_path_add_nohpfpm(device, lpum); 5725a521b048SStefan Haberland dasd_path_remove_opm(device, lpum); 5726a521b048SStefan Haberland dev_err(&device->cdev->dev, 5727a521b048SStefan Haberland "Channel path %02X lost HPF functionality and is disabled\n", 5728a521b048SStefan Haberland lpum); 5729a521b048SStefan Haberland return 1; 5730a521b048SStefan Haberland } 5731a521b048SStefan Haberland return 0; 5732a521b048SStefan Haberland } 5733a521b048SStefan Haberland 5734a521b048SStefan Haberland static void dasd_eckd_disable_hpf_device(struct dasd_device *device) 5735a521b048SStefan Haberland { 5736a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 5737a521b048SStefan Haberland 5738a521b048SStefan Haberland dev_err(&device->cdev->dev, 5739a521b048SStefan Haberland "High Performance FICON disabled\n"); 5740a521b048SStefan Haberland private->fcx_max_data = 0; 5741a521b048SStefan Haberland } 5742a521b048SStefan Haberland 5743a521b048SStefan Haberland static int dasd_eckd_hpf_enabled(struct dasd_device *device) 5744a521b048SStefan Haberland { 5745a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 5746a521b048SStefan Haberland 5747a521b048SStefan Haberland return private->fcx_max_data ? 1 : 0; 5748a521b048SStefan Haberland } 5749a521b048SStefan Haberland 5750a521b048SStefan Haberland static void dasd_eckd_handle_hpf_error(struct dasd_device *device, 5751a521b048SStefan Haberland struct irb *irb) 5752a521b048SStefan Haberland { 5753a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 5754a521b048SStefan Haberland 5755a521b048SStefan Haberland if (!private->fcx_max_data) { 5756a521b048SStefan Haberland /* sanity check for no HPF, the error makes no sense */ 5757a521b048SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 5758a521b048SStefan Haberland "Trying to disable HPF for a non HPF device"); 5759a521b048SStefan Haberland return; 5760a521b048SStefan Haberland } 5761a521b048SStefan Haberland if (irb->scsw.tm.sesq == SCSW_SESQ_DEV_NOFCX) { 5762a521b048SStefan Haberland dasd_eckd_disable_hpf_device(device); 5763a521b048SStefan Haberland } else if (irb->scsw.tm.sesq == SCSW_SESQ_PATH_NOFCX) { 5764a521b048SStefan Haberland if (dasd_eckd_disable_hpf_path(device, irb->esw.esw1.lpum)) 5765a521b048SStefan Haberland return; 5766a521b048SStefan Haberland dasd_eckd_disable_hpf_device(device); 5767a521b048SStefan Haberland dasd_path_set_tbvpm(device, 5768a521b048SStefan Haberland dasd_path_get_hpfpm(device)); 5769a521b048SStefan Haberland } 5770a521b048SStefan Haberland /* 5771a521b048SStefan Haberland * prevent that any new I/O ist started on the device and schedule a 5772a521b048SStefan Haberland * requeue of existing requests 5773a521b048SStefan Haberland */ 5774a521b048SStefan Haberland dasd_device_set_stop_bits(device, DASD_STOPPED_NOT_ACC); 5775a521b048SStefan Haberland dasd_schedule_requeue(device); 5776a521b048SStefan Haberland } 5777a521b048SStefan Haberland 5778d41dd122SStefan Haberland static struct ccw_driver dasd_eckd_driver = { 57793bda058bSSebastian Ott .driver = { 5780d41dd122SStefan Haberland .name = "dasd-eckd", 5781d41dd122SStefan Haberland .owner = THIS_MODULE, 57823bda058bSSebastian Ott }, 5783d41dd122SStefan Haberland .ids = dasd_eckd_ids, 5784d41dd122SStefan Haberland .probe = dasd_eckd_probe, 5785d41dd122SStefan Haberland .remove = dasd_generic_remove, 5786d41dd122SStefan Haberland .set_offline = dasd_generic_set_offline, 5787d41dd122SStefan Haberland .set_online = dasd_eckd_set_online, 5788d41dd122SStefan Haberland .notify = dasd_generic_notify, 5789a4d26c6aSStefan Weinhuber .path_event = dasd_generic_path_event, 57904679e893SStefan Haberland .shutdown = dasd_generic_shutdown, 5791d41dd122SStefan Haberland .freeze = dasd_generic_pm_freeze, 5792d41dd122SStefan Haberland .thaw = dasd_generic_restore_device, 5793d41dd122SStefan Haberland .restore = dasd_generic_restore_device, 5794a23ed009SStefan Haberland .uc_handler = dasd_generic_uc_handler, 5795420f42ecSHeiko Carstens .int_class = IRQIO_DAS, 5796d41dd122SStefan Haberland }; 5797f3eb5384SStefan Weinhuber 57981da177e4SLinus Torvalds /* 57991da177e4SLinus Torvalds * max_blocks is dependent on the amount of storage that is available 58001da177e4SLinus Torvalds * in the static io buffer for each device. Currently each device has 58011da177e4SLinus Torvalds * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has 58021da177e4SLinus Torvalds * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use 58031da177e4SLinus Torvalds * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In 58041da177e4SLinus Torvalds * addition we have one define extent ccw + 16 bytes of data and one 58051da177e4SLinus Torvalds * locate record ccw + 16 bytes of data. That makes: 58061da177e4SLinus Torvalds * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. 58071da177e4SLinus Torvalds * We want to fit two into the available memory so that we can immediately 58081da177e4SLinus Torvalds * start the next request if one finishes off. That makes 249.5 blocks 58091da177e4SLinus Torvalds * for one request. Give a little safety and the result is 240. 58101da177e4SLinus Torvalds */ 58111da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline = { 58121da177e4SLinus Torvalds .owner = THIS_MODULE, 58131da177e4SLinus Torvalds .name = "ECKD", 58141da177e4SLinus Torvalds .ebcname = "ECKD", 5815ef19298bSStefan Weinhuber .max_blocks = 190, 58161da177e4SLinus Torvalds .check_device = dasd_eckd_check_characteristics, 58178e09f215SStefan Weinhuber .uncheck_device = dasd_eckd_uncheck_device, 58181da177e4SLinus Torvalds .do_analysis = dasd_eckd_do_analysis, 5819a4d26c6aSStefan Weinhuber .verify_path = dasd_eckd_verify_path, 5820d42e1712SStefan Haberland .basic_to_ready = dasd_eckd_basic_to_ready, 58218e09f215SStefan Weinhuber .online_to_ready = dasd_eckd_online_to_ready, 5822daa991bfSStefan Haberland .basic_to_known = dasd_eckd_basic_to_known, 58231da177e4SLinus Torvalds .fill_geometry = dasd_eckd_fill_geometry, 58241da177e4SLinus Torvalds .start_IO = dasd_start_IO, 58251da177e4SLinus Torvalds .term_IO = dasd_term_IO, 58268e09f215SStefan Weinhuber .handle_terminated_request = dasd_eckd_handle_terminated_request, 58271da177e4SLinus Torvalds .format_device = dasd_eckd_format_device, 58288fd57520SJan Höppner .check_device_format = dasd_eckd_check_device_format, 58291da177e4SLinus Torvalds .erp_action = dasd_eckd_erp_action, 58301da177e4SLinus Torvalds .erp_postaction = dasd_eckd_erp_postaction, 58315a27e60dSStefan Weinhuber .check_for_device_change = dasd_eckd_check_for_device_change, 58328e09f215SStefan Weinhuber .build_cp = dasd_eckd_build_alias_cp, 58338e09f215SStefan Weinhuber .free_cp = dasd_eckd_free_alias_cp, 58341da177e4SLinus Torvalds .dump_sense = dasd_eckd_dump_sense, 5835fc19f381SStefan Haberland .dump_sense_dbf = dasd_eckd_dump_sense_dbf, 58361da177e4SLinus Torvalds .fill_info = dasd_eckd_fill_info, 58371107ccfbSChristoph Hellwig .ioctl = dasd_eckd_ioctl, 5838d41dd122SStefan Haberland .freeze = dasd_eckd_pm_freeze, 5839d41dd122SStefan Haberland .restore = dasd_eckd_restore_device, 5840501183f2SStefan Haberland .reload = dasd_eckd_reload_device, 58412dedf0d9SStefan Haberland .get_uid = dasd_eckd_get_uid, 5842f1633031SStefan Haberland .kick_validate = dasd_eckd_kick_validate_server, 58435db8440cSStefan Haberland .check_attention = dasd_eckd_check_attention, 58445a3b7b11SStefan Haberland .host_access_count = dasd_eckd_host_access_count, 58455a3b7b11SStefan Haberland .hosts_print = dasd_hosts_print, 5846a521b048SStefan Haberland .handle_hpf_error = dasd_eckd_handle_hpf_error, 5847a521b048SStefan Haberland .disable_hpf = dasd_eckd_disable_hpf_device, 5848a521b048SStefan Haberland .hpf_enabled = dasd_eckd_hpf_enabled, 5849a521b048SStefan Haberland .reset_path = dasd_eckd_reset_path, 58501da177e4SLinus Torvalds }; 58511da177e4SLinus Torvalds 58521da177e4SLinus Torvalds static int __init 58531da177e4SLinus Torvalds dasd_eckd_init(void) 58541da177e4SLinus Torvalds { 5855736e6ea0SSebastian Ott int ret; 5856736e6ea0SSebastian Ott 58571da177e4SLinus Torvalds ASCEBC(dasd_eckd_discipline.ebcname, 4); 5858f932bceaSStefan Weinhuber dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), 5859f932bceaSStefan Weinhuber GFP_KERNEL | GFP_DMA); 5860f932bceaSStefan Weinhuber if (!dasd_reserve_req) 5861f932bceaSStefan Weinhuber return -ENOMEM; 5862a4d26c6aSStefan Weinhuber path_verification_worker = kmalloc(sizeof(*path_verification_worker), 5863a4d26c6aSStefan Weinhuber GFP_KERNEL | GFP_DMA); 5864a4d26c6aSStefan Weinhuber if (!path_verification_worker) { 5865a4d26c6aSStefan Weinhuber kfree(dasd_reserve_req); 5866a4d26c6aSStefan Weinhuber return -ENOMEM; 5867a4d26c6aSStefan Weinhuber } 5868558b9ef0SStefan Weinhuber rawpadpage = (void *)__get_free_page(GFP_KERNEL); 5869558b9ef0SStefan Weinhuber if (!rawpadpage) { 5870558b9ef0SStefan Weinhuber kfree(path_verification_worker); 5871558b9ef0SStefan Weinhuber kfree(dasd_reserve_req); 5872558b9ef0SStefan Weinhuber return -ENOMEM; 5873558b9ef0SStefan Weinhuber } 5874736e6ea0SSebastian Ott ret = ccw_driver_register(&dasd_eckd_driver); 5875736e6ea0SSebastian Ott if (!ret) 5876736e6ea0SSebastian Ott wait_for_device_probe(); 5877a4d26c6aSStefan Weinhuber else { 5878a4d26c6aSStefan Weinhuber kfree(path_verification_worker); 5879f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 5880558b9ef0SStefan Weinhuber free_page((unsigned long)rawpadpage); 5881a4d26c6aSStefan Weinhuber } 5882736e6ea0SSebastian Ott return ret; 58831da177e4SLinus Torvalds } 58841da177e4SLinus Torvalds 58851da177e4SLinus Torvalds static void __exit 58861da177e4SLinus Torvalds dasd_eckd_cleanup(void) 58871da177e4SLinus Torvalds { 58881da177e4SLinus Torvalds ccw_driver_unregister(&dasd_eckd_driver); 5889a4d26c6aSStefan Weinhuber kfree(path_verification_worker); 5890f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 5891558b9ef0SStefan Weinhuber free_page((unsigned long)rawpadpage); 58921da177e4SLinus Torvalds } 58931da177e4SLinus Torvalds 58941da177e4SLinus Torvalds module_init(dasd_eckd_init); 58951da177e4SLinus Torvalds module_exit(dasd_eckd_cleanup); 5896