11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> 31da177e4SLinus Torvalds * Horst Hummel <Horst.Hummel@de.ibm.com> 41da177e4SLinus Torvalds * Carsten Otte <Cotte@de.ibm.com> 51da177e4SLinus Torvalds * Martin Schwidefsky <schwidefsky@de.ibm.com> 61da177e4SLinus Torvalds * Bugreports.to..: <Linux390@de.ibm.com> 7d41dd122SStefan Haberland * Copyright IBM Corp. 1999, 2009 8ab1d848fSNigel Hislop * EMC Symmetrix ioctl Copyright EMC Corporation, 2008 9ab1d848fSNigel Hislop * Author.........: Nigel Hislop <hislop_nigel@emc.com> 101da177e4SLinus Torvalds */ 111da177e4SLinus Torvalds 12ca99dab0SStefan Haberland #define KMSG_COMPONENT "dasd-eckd" 13fc19f381SStefan Haberland 141da177e4SLinus Torvalds #include <linux/stddef.h> 151da177e4SLinus Torvalds #include <linux/kernel.h> 161da177e4SLinus Torvalds #include <linux/slab.h> 171da177e4SLinus Torvalds #include <linux/hdreg.h> /* HDIO_GETGEO */ 181da177e4SLinus Torvalds #include <linux/bio.h> 191da177e4SLinus Torvalds #include <linux/module.h> 20048cd4e5SHeiko Carstens #include <linux/compat.h> 211da177e4SLinus Torvalds #include <linux/init.h> 225a3b7b11SStefan Haberland #include <linux/seq_file.h> 231da177e4SLinus Torvalds 24382b7366SSebastian Ott #include <asm/css_chars.h> 251da177e4SLinus Torvalds #include <asm/debug.h> 261da177e4SLinus Torvalds #include <asm/idals.h> 271da177e4SLinus Torvalds #include <asm/ebcdic.h> 281da177e4SLinus Torvalds #include <asm/io.h> 291da177e4SLinus Torvalds #include <asm/uaccess.h> 3040545573SHorst Hummel #include <asm/cio.h> 311da177e4SLinus Torvalds #include <asm/ccwdev.h> 32f3eb5384SStefan Weinhuber #include <asm/itcw.h> 335db8440cSStefan Haberland #include <asm/schid.h> 345db8440cSStefan Haberland #include <asm/chpid.h> 351da177e4SLinus Torvalds 361da177e4SLinus Torvalds #include "dasd_int.h" 371da177e4SLinus Torvalds #include "dasd_eckd.h" 381da177e4SLinus Torvalds 391da177e4SLinus Torvalds #ifdef PRINTK_HEADER 401da177e4SLinus Torvalds #undef PRINTK_HEADER 411da177e4SLinus Torvalds #endif /* PRINTK_HEADER */ 421da177e4SLinus Torvalds #define PRINTK_HEADER "dasd(eckd):" 431da177e4SLinus Torvalds 441da177e4SLinus Torvalds #define ECKD_C0(i) (i->home_bytes) 451da177e4SLinus Torvalds #define ECKD_F(i) (i->formula) 461da177e4SLinus Torvalds #define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\ 471da177e4SLinus Torvalds (i->factors.f_0x02.f1)) 481da177e4SLinus Torvalds #define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\ 491da177e4SLinus Torvalds (i->factors.f_0x02.f2)) 501da177e4SLinus Torvalds #define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\ 511da177e4SLinus Torvalds (i->factors.f_0x02.f3)) 521da177e4SLinus Torvalds #define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0) 531da177e4SLinus Torvalds #define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0) 541da177e4SLinus Torvalds #define ECKD_F6(i) (i->factor6) 551da177e4SLinus Torvalds #define ECKD_F7(i) (i->factor7) 561da177e4SLinus Torvalds #define ECKD_F8(i) (i->factor8) 571da177e4SLinus Torvalds 58e4dbb0f2SStefan Haberland /* 59e4dbb0f2SStefan Haberland * raw track access always map to 64k in memory 60e4dbb0f2SStefan Haberland * so it maps to 16 blocks of 4k per track 61e4dbb0f2SStefan Haberland */ 62e4dbb0f2SStefan Haberland #define DASD_RAW_BLOCK_PER_TRACK 16 63e4dbb0f2SStefan Haberland #define DASD_RAW_BLOCKSIZE 4096 64e4dbb0f2SStefan Haberland /* 64k are 128 x 512 byte sectors */ 65e4dbb0f2SStefan Haberland #define DASD_RAW_SECTORS_PER_TRACK 128 66e4dbb0f2SStefan Haberland 671da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 681da177e4SLinus Torvalds 691da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline; 701da177e4SLinus Torvalds 711da177e4SLinus Torvalds /* The ccw bus type uses this table to find devices that it sends to 721da177e4SLinus Torvalds * dasd_eckd_probe */ 731da177e4SLinus Torvalds static struct ccw_device_id dasd_eckd_ids[] = { 74d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1}, 75d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2}, 765da24b76SStefan Haberland { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3380, 0), .driver_info = 0x3}, 77d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4}, 78d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5}, 79d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6}, 80d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7}, 81d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8}, 82d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9}, 83d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa}, 841da177e4SLinus Torvalds { /* end of list */ }, 851da177e4SLinus Torvalds }; 861da177e4SLinus Torvalds 871da177e4SLinus Torvalds MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids); 881da177e4SLinus Torvalds 891da177e4SLinus Torvalds static struct ccw_driver dasd_eckd_driver; /* see below */ 901da177e4SLinus Torvalds 91558b9ef0SStefan Weinhuber static void *rawpadpage; 92558b9ef0SStefan Weinhuber 93eb6e199bSStefan Weinhuber #define INIT_CQR_OK 0 94eb6e199bSStefan Weinhuber #define INIT_CQR_UNFORMATTED 1 95eb6e199bSStefan Weinhuber #define INIT_CQR_ERROR 2 96eb6e199bSStefan Weinhuber 97f932bceaSStefan Weinhuber /* emergency request for reserve/release */ 98f932bceaSStefan Weinhuber static struct { 99f932bceaSStefan Weinhuber struct dasd_ccw_req cqr; 100f932bceaSStefan Weinhuber struct ccw1 ccw; 101f932bceaSStefan Weinhuber char data[32]; 102f932bceaSStefan Weinhuber } *dasd_reserve_req; 103f932bceaSStefan Weinhuber static DEFINE_MUTEX(dasd_reserve_mutex); 104f932bceaSStefan Weinhuber 105a4d26c6aSStefan Weinhuber /* definitions for the path verification worker */ 106a4d26c6aSStefan Weinhuber struct path_verification_work_data { 107a4d26c6aSStefan Weinhuber struct work_struct worker; 108a4d26c6aSStefan Weinhuber struct dasd_device *device; 109a4d26c6aSStefan Weinhuber struct dasd_ccw_req cqr; 110a4d26c6aSStefan Weinhuber struct ccw1 ccw; 111a4d26c6aSStefan Weinhuber __u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE]; 112a4d26c6aSStefan Weinhuber int isglobal; 113a4d26c6aSStefan Weinhuber __u8 tbvpm; 114a4d26c6aSStefan Weinhuber }; 115a4d26c6aSStefan Weinhuber static struct path_verification_work_data *path_verification_worker; 116a4d26c6aSStefan Weinhuber static DEFINE_MUTEX(dasd_path_verification_mutex); 117eb6e199bSStefan Weinhuber 1185db8440cSStefan Haberland struct check_attention_work_data { 1195db8440cSStefan Haberland struct work_struct worker; 1205db8440cSStefan Haberland struct dasd_device *device; 1215db8440cSStefan Haberland __u8 lpum; 1225db8440cSStefan Haberland }; 1235db8440cSStefan Haberland 1241da177e4SLinus Torvalds /* initial attempt at a probe function. this can be simplified once 1251da177e4SLinus Torvalds * the other detection code is gone */ 1261da177e4SLinus Torvalds static int 1271da177e4SLinus Torvalds dasd_eckd_probe (struct ccw_device *cdev) 1281da177e4SLinus Torvalds { 1291da177e4SLinus Torvalds int ret; 1301da177e4SLinus Torvalds 13140545573SHorst Hummel /* set ECKD specific ccw-device options */ 132454e1fa1SPeter Oberparleiter ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE | 133454e1fa1SPeter Oberparleiter CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH); 13440545573SHorst Hummel if (ret) { 135b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s", 136b8ed5dd5SStefan Haberland "dasd_eckd_probe: could not set " 137b8ed5dd5SStefan Haberland "ccw-device options"); 1381da177e4SLinus Torvalds return ret; 13940545573SHorst Hummel } 14040545573SHorst Hummel ret = dasd_generic_probe(cdev, &dasd_eckd_discipline); 14140545573SHorst Hummel return ret; 1421da177e4SLinus Torvalds } 1431da177e4SLinus Torvalds 1441da177e4SLinus Torvalds static int 1451da177e4SLinus Torvalds dasd_eckd_set_online(struct ccw_device *cdev) 1461da177e4SLinus Torvalds { 1471da177e4SLinus Torvalds return dasd_generic_set_online(cdev, &dasd_eckd_discipline); 1481da177e4SLinus Torvalds } 1491da177e4SLinus Torvalds 1501da177e4SLinus Torvalds static const int sizes_trk0[] = { 28, 148, 84 }; 1511da177e4SLinus Torvalds #define LABEL_SIZE 140 1521da177e4SLinus Torvalds 1533bc9fef9SStefan Haberland /* head and record addresses of count_area read in analysis ccw */ 1543bc9fef9SStefan Haberland static const int count_area_head[] = { 0, 0, 0, 0, 2 }; 1553bc9fef9SStefan Haberland static const int count_area_rec[] = { 1, 2, 3, 4, 1 }; 1563bc9fef9SStefan Haberland 1571da177e4SLinus Torvalds static inline unsigned int 1581da177e4SLinus Torvalds round_up_multiple(unsigned int no, unsigned int mult) 1591da177e4SLinus Torvalds { 1601da177e4SLinus Torvalds int rem = no % mult; 1611da177e4SLinus Torvalds return (rem ? no - rem + mult : no); 1621da177e4SLinus Torvalds } 1631da177e4SLinus Torvalds 1641da177e4SLinus Torvalds static inline unsigned int 1651da177e4SLinus Torvalds ceil_quot(unsigned int d1, unsigned int d2) 1661da177e4SLinus Torvalds { 1671da177e4SLinus Torvalds return (d1 + (d2 - 1)) / d2; 1681da177e4SLinus Torvalds } 1691da177e4SLinus Torvalds 1704d284cacSHeiko Carstens static unsigned int 1711da177e4SLinus Torvalds recs_per_track(struct dasd_eckd_characteristics * rdc, 1721da177e4SLinus Torvalds unsigned int kl, unsigned int dl) 1731da177e4SLinus Torvalds { 1741da177e4SLinus Torvalds int dn, kn; 1751da177e4SLinus Torvalds 1761da177e4SLinus Torvalds switch (rdc->dev_type) { 1771da177e4SLinus Torvalds case 0x3380: 1781da177e4SLinus Torvalds if (kl) 1791da177e4SLinus Torvalds return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + 1801da177e4SLinus Torvalds ceil_quot(dl + 12, 32)); 1811da177e4SLinus Torvalds else 1821da177e4SLinus Torvalds return 1499 / (15 + ceil_quot(dl + 12, 32)); 1831da177e4SLinus Torvalds case 0x3390: 1841da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1851da177e4SLinus Torvalds if (kl) { 1861da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1871da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + 1881da177e4SLinus Torvalds 9 + ceil_quot(dl + 6 * dn, 34)); 1891da177e4SLinus Torvalds } else 1901da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); 1911da177e4SLinus Torvalds case 0x9345: 1921da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1931da177e4SLinus Torvalds if (kl) { 1941da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1951da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + 1961da177e4SLinus Torvalds ceil_quot(dl + 6 * dn, 34)); 1971da177e4SLinus Torvalds } else 1981da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); 1991da177e4SLinus Torvalds } 2001da177e4SLinus Torvalds return 0; 2011da177e4SLinus Torvalds } 2021da177e4SLinus Torvalds 203b44b0ab3SStefan Weinhuber static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head) 204b44b0ab3SStefan Weinhuber { 205b44b0ab3SStefan Weinhuber geo->cyl = (__u16) cyl; 206b44b0ab3SStefan Weinhuber geo->head = cyl >> 16; 207b44b0ab3SStefan Weinhuber geo->head <<= 4; 208b44b0ab3SStefan Weinhuber geo->head |= head; 209b44b0ab3SStefan Weinhuber } 210b44b0ab3SStefan Weinhuber 2114d284cacSHeiko Carstens static int 2121da177e4SLinus Torvalds check_XRC (struct ccw1 *de_ccw, 2131da177e4SLinus Torvalds struct DE_eckd_data *data, 2141da177e4SLinus Torvalds struct dasd_device *device) 2151da177e4SLinus Torvalds { 216543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 217d54853efSMartin Schwidefsky int rc; 2181da177e4SLinus Torvalds 219d54853efSMartin Schwidefsky if (!private->rdc_data.facilities.XRC_supported) 220d54853efSMartin Schwidefsky return 0; 2211da177e4SLinus Torvalds 2221da177e4SLinus Torvalds /* switch on System Time Stamp - needed for XRC Support */ 2231da177e4SLinus Torvalds data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ 2241da177e4SLinus Torvalds data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ 2251da177e4SLinus Torvalds 226d54853efSMartin Schwidefsky rc = get_sync_clock(&data->ep_sys_time); 227d54853efSMartin Schwidefsky /* Ignore return code if sync clock is switched off. */ 228a8f6db4dSHeiko Carstens if (rc == -EOPNOTSUPP || rc == -EACCES) 229d54853efSMartin Schwidefsky rc = 0; 2301da177e4SLinus Torvalds 2311da177e4SLinus Torvalds de_ccw->count = sizeof(struct DE_eckd_data); 2321da177e4SLinus Torvalds de_ccw->flags |= CCW_FLAG_SLI; 233d54853efSMartin Schwidefsky return rc; 2341da177e4SLinus Torvalds } 2351da177e4SLinus Torvalds 2364d284cacSHeiko Carstens static int 237b44b0ab3SStefan Weinhuber define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk, 238b44b0ab3SStefan Weinhuber unsigned int totrk, int cmd, struct dasd_device *device) 2391da177e4SLinus Torvalds { 240543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 241b44b0ab3SStefan Weinhuber u32 begcyl, endcyl; 242b44b0ab3SStefan Weinhuber u16 heads, beghead, endhead; 243d54853efSMartin Schwidefsky int rc = 0; 2441da177e4SLinus Torvalds 2451da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; 2461da177e4SLinus Torvalds ccw->flags = 0; 2471da177e4SLinus Torvalds ccw->count = 16; 2481da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 2491da177e4SLinus Torvalds 2501da177e4SLinus Torvalds memset(data, 0, sizeof(struct DE_eckd_data)); 2511da177e4SLinus Torvalds switch (cmd) { 2521da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 2531da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 2541da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 2551da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 2561da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 2571da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 2581da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 2591da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 2601da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_COUNT: 2611da177e4SLinus Torvalds data->mask.perm = 0x1; 2621da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 2631da177e4SLinus Torvalds break; 2641da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 2651da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 2661da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 2671da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 2681da177e4SLinus Torvalds data->mask.perm = 0x02; 2691da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 270d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2711da177e4SLinus Torvalds break; 2721da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 2731da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 2741da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 275d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2761da177e4SLinus Torvalds break; 2771da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 2781da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 2791da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 2801da177e4SLinus Torvalds data->mask.perm = 0x3; 2811da177e4SLinus Torvalds data->mask.auth = 0x1; 2821da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 283d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2841da177e4SLinus Torvalds break; 2851da177e4SLinus Torvalds default: 286fc19f381SStefan Haberland dev_err(&device->cdev->dev, 287fc19f381SStefan Haberland "0x%x is not a known command\n", cmd); 2881da177e4SLinus Torvalds break; 2891da177e4SLinus Torvalds } 2901da177e4SLinus Torvalds 2911da177e4SLinus Torvalds data->attributes.mode = 0x3; /* ECKD */ 2921da177e4SLinus Torvalds 2931da177e4SLinus Torvalds if ((private->rdc_data.cu_type == 0x2105 || 2941da177e4SLinus Torvalds private->rdc_data.cu_type == 0x2107 || 2951da177e4SLinus Torvalds private->rdc_data.cu_type == 0x1750) 2961da177e4SLinus Torvalds && !(private->uses_cdl && trk < 2)) 2971da177e4SLinus Torvalds data->ga_extended |= 0x40; /* Regular Data Format Mode */ 2981da177e4SLinus Torvalds 299b44b0ab3SStefan Weinhuber heads = private->rdc_data.trk_per_cyl; 300b44b0ab3SStefan Weinhuber begcyl = trk / heads; 301b44b0ab3SStefan Weinhuber beghead = trk % heads; 302b44b0ab3SStefan Weinhuber endcyl = totrk / heads; 303b44b0ab3SStefan Weinhuber endhead = totrk % heads; 3041da177e4SLinus Torvalds 3051da177e4SLinus Torvalds /* check for sequential prestage - enhance cylinder range */ 3061da177e4SLinus Torvalds if (data->attributes.operation == DASD_SEQ_PRESTAGE || 3071da177e4SLinus Torvalds data->attributes.operation == DASD_SEQ_ACCESS) { 3081da177e4SLinus Torvalds 309b44b0ab3SStefan Weinhuber if (endcyl + private->attrib.nr_cyl < private->real_cyl) 310b44b0ab3SStefan Weinhuber endcyl += private->attrib.nr_cyl; 3111da177e4SLinus Torvalds else 312b44b0ab3SStefan Weinhuber endcyl = (private->real_cyl - 1); 3131da177e4SLinus Torvalds } 3141da177e4SLinus Torvalds 315b44b0ab3SStefan Weinhuber set_ch_t(&data->beg_ext, begcyl, beghead); 316b44b0ab3SStefan Weinhuber set_ch_t(&data->end_ext, endcyl, endhead); 317d54853efSMartin Schwidefsky return rc; 3181da177e4SLinus Torvalds } 3191da177e4SLinus Torvalds 3208e09f215SStefan Weinhuber static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata, 3218e09f215SStefan Weinhuber struct dasd_device *device) 3228e09f215SStefan Weinhuber { 323543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 3248e09f215SStefan Weinhuber int rc; 3258e09f215SStefan Weinhuber 3268e09f215SStefan Weinhuber if (!private->rdc_data.facilities.XRC_supported) 3278e09f215SStefan Weinhuber return 0; 3288e09f215SStefan Weinhuber 3298e09f215SStefan Weinhuber /* switch on System Time Stamp - needed for XRC Support */ 330f3eb5384SStefan Weinhuber pfxdata->define_extent.ga_extended |= 0x08; /* 'Time Stamp Valid' */ 331f3eb5384SStefan Weinhuber pfxdata->define_extent.ga_extended |= 0x02; /* 'Extended Parameter' */ 3328e09f215SStefan Weinhuber pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */ 3338e09f215SStefan Weinhuber 334f3eb5384SStefan Weinhuber rc = get_sync_clock(&pfxdata->define_extent.ep_sys_time); 3358e09f215SStefan Weinhuber /* Ignore return code if sync clock is switched off. */ 336a8f6db4dSHeiko Carstens if (rc == -EOPNOTSUPP || rc == -EACCES) 3378e09f215SStefan Weinhuber rc = 0; 3388e09f215SStefan Weinhuber return rc; 3398e09f215SStefan Weinhuber } 3408e09f215SStefan Weinhuber 341f3eb5384SStefan Weinhuber static void fill_LRE_data(struct LRE_eckd_data *data, unsigned int trk, 342f3eb5384SStefan Weinhuber unsigned int rec_on_trk, int count, int cmd, 343f3eb5384SStefan Weinhuber struct dasd_device *device, unsigned int reclen, 344f3eb5384SStefan Weinhuber unsigned int tlf) 345f3eb5384SStefan Weinhuber { 346543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 347f3eb5384SStefan Weinhuber int sector; 348f3eb5384SStefan Weinhuber int dn, d; 349f3eb5384SStefan Weinhuber 350f3eb5384SStefan Weinhuber memset(data, 0, sizeof(*data)); 351f3eb5384SStefan Weinhuber sector = 0; 352f3eb5384SStefan Weinhuber if (rec_on_trk) { 353f3eb5384SStefan Weinhuber switch (private->rdc_data.dev_type) { 354f3eb5384SStefan Weinhuber case 0x3390: 355f3eb5384SStefan Weinhuber dn = ceil_quot(reclen + 6, 232); 356f3eb5384SStefan Weinhuber d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 357f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 358f3eb5384SStefan Weinhuber break; 359f3eb5384SStefan Weinhuber case 0x3380: 360f3eb5384SStefan Weinhuber d = 7 + ceil_quot(reclen + 12, 32); 361f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 362f3eb5384SStefan Weinhuber break; 363f3eb5384SStefan Weinhuber } 364f3eb5384SStefan Weinhuber } 365f3eb5384SStefan Weinhuber data->sector = sector; 366f3eb5384SStefan Weinhuber /* note: meaning of count depends on the operation 367f3eb5384SStefan Weinhuber * for record based I/O it's the number of records, but for 368f3eb5384SStefan Weinhuber * track based I/O it's the number of tracks 369f3eb5384SStefan Weinhuber */ 370f3eb5384SStefan Weinhuber data->count = count; 371f3eb5384SStefan Weinhuber switch (cmd) { 372f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 373f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 374f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 375f3eb5384SStefan Weinhuber break; 376f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_HOME_ADDRESS: 377f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 378f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 379f3eb5384SStefan Weinhuber break; 380f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 381f3eb5384SStefan Weinhuber data->operation.orientation = 0x1; 382f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 383f3eb5384SStefan Weinhuber data->count++; 384f3eb5384SStefan Weinhuber break; 385f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_RECORD_ZERO: 386f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 387f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 388f3eb5384SStefan Weinhuber data->count++; 389f3eb5384SStefan Weinhuber break; 390f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE: 391f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_MT: 392f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD: 393f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD_MT: 394f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 395f3eb5384SStefan Weinhuber data->length = reclen; 396f3eb5384SStefan Weinhuber data->operation.operation = 0x01; 397f3eb5384SStefan Weinhuber break; 398f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD: 399f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD_MT: 400f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 401f3eb5384SStefan Weinhuber data->length = reclen; 402f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 403f3eb5384SStefan Weinhuber break; 404e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_WRITE_FULL_TRACK: 405e4dbb0f2SStefan Haberland data->operation.orientation = 0x0; 406e4dbb0f2SStefan Haberland data->operation.operation = 0x3F; 407e4dbb0f2SStefan Haberland data->extended_operation = 0x11; 408e4dbb0f2SStefan Haberland data->length = 0; 409e4dbb0f2SStefan Haberland data->extended_parameter_length = 0x02; 410e4dbb0f2SStefan Haberland if (data->count > 8) { 411e4dbb0f2SStefan Haberland data->extended_parameter[0] = 0xFF; 412e4dbb0f2SStefan Haberland data->extended_parameter[1] = 0xFF; 413e4dbb0f2SStefan Haberland data->extended_parameter[1] <<= (16 - count); 414e4dbb0f2SStefan Haberland } else { 415e4dbb0f2SStefan Haberland data->extended_parameter[0] = 0xFF; 416e4dbb0f2SStefan Haberland data->extended_parameter[0] <<= (8 - count); 417e4dbb0f2SStefan Haberland data->extended_parameter[1] = 0x00; 418e4dbb0f2SStefan Haberland } 419e4dbb0f2SStefan Haberland data->sector = 0xFF; 420e4dbb0f2SStefan Haberland break; 421f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 422f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 423f3eb5384SStefan Weinhuber data->length = reclen; /* not tlf, as one might think */ 424f3eb5384SStefan Weinhuber data->operation.operation = 0x3F; 425f3eb5384SStefan Weinhuber data->extended_operation = 0x23; 426f3eb5384SStefan Weinhuber break; 427f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ: 428f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_MT: 429f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_KD: 430f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_KD_MT: 431f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 432f3eb5384SStefan Weinhuber data->length = reclen; 433f3eb5384SStefan Weinhuber data->operation.operation = 0x06; 434f3eb5384SStefan Weinhuber break; 435f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD: 436f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD_MT: 437f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 438f3eb5384SStefan Weinhuber data->length = reclen; 439f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 440f3eb5384SStefan Weinhuber break; 441f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_COUNT: 442f3eb5384SStefan Weinhuber data->operation.operation = 0x06; 443f3eb5384SStefan Weinhuber break; 444e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_READ_TRACK: 445e4dbb0f2SStefan Haberland data->operation.orientation = 0x1; 446e4dbb0f2SStefan Haberland data->operation.operation = 0x0C; 447e4dbb0f2SStefan Haberland data->extended_parameter_length = 0; 448e4dbb0f2SStefan Haberland data->sector = 0xFF; 449e4dbb0f2SStefan Haberland break; 450f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 451f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 452f3eb5384SStefan Weinhuber data->length = tlf; 453f3eb5384SStefan Weinhuber data->operation.operation = 0x0C; 454f3eb5384SStefan Weinhuber break; 455f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_ERASE: 456f3eb5384SStefan Weinhuber data->length = reclen; 457f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 458f3eb5384SStefan Weinhuber data->operation.operation = 0x0b; 459f3eb5384SStefan Weinhuber break; 460f3eb5384SStefan Weinhuber default: 461f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, device, 462f3eb5384SStefan Weinhuber "fill LRE unknown opcode 0x%x", cmd); 463f3eb5384SStefan Weinhuber BUG(); 464f3eb5384SStefan Weinhuber } 465f3eb5384SStefan Weinhuber set_ch_t(&data->seek_addr, 466f3eb5384SStefan Weinhuber trk / private->rdc_data.trk_per_cyl, 467f3eb5384SStefan Weinhuber trk % private->rdc_data.trk_per_cyl); 468f3eb5384SStefan Weinhuber data->search_arg.cyl = data->seek_addr.cyl; 469f3eb5384SStefan Weinhuber data->search_arg.head = data->seek_addr.head; 470f3eb5384SStefan Weinhuber data->search_arg.record = rec_on_trk; 471f3eb5384SStefan Weinhuber } 472f3eb5384SStefan Weinhuber 473f3eb5384SStefan Weinhuber static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 474b44b0ab3SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 475f3eb5384SStefan Weinhuber struct dasd_device *basedev, struct dasd_device *startdev, 476f3eb5384SStefan Weinhuber unsigned char format, unsigned int rec_on_trk, int count, 477f3eb5384SStefan Weinhuber unsigned int blksize, unsigned int tlf) 4788e09f215SStefan Weinhuber { 4798e09f215SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 480f3eb5384SStefan Weinhuber struct DE_eckd_data *dedata; 481f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 482b44b0ab3SStefan Weinhuber u32 begcyl, endcyl; 483b44b0ab3SStefan Weinhuber u16 heads, beghead, endhead; 4848e09f215SStefan Weinhuber int rc = 0; 4858e09f215SStefan Weinhuber 486543691a4SSebastian Ott basepriv = basedev->private; 487543691a4SSebastian Ott startpriv = startdev->private; 488f3eb5384SStefan Weinhuber dedata = &pfxdata->define_extent; 489f3eb5384SStefan Weinhuber lredata = &pfxdata->locate_record; 4908e09f215SStefan Weinhuber 4918e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PFX; 4928e09f215SStefan Weinhuber ccw->flags = 0; 493e4dbb0f2SStefan Haberland if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) { 494e4dbb0f2SStefan Haberland ccw->count = sizeof(*pfxdata) + 2; 495e4dbb0f2SStefan Haberland ccw->cda = (__u32) __pa(pfxdata); 496e4dbb0f2SStefan Haberland memset(pfxdata, 0, sizeof(*pfxdata) + 2); 497e4dbb0f2SStefan Haberland } else { 4988e09f215SStefan Weinhuber ccw->count = sizeof(*pfxdata); 4998e09f215SStefan Weinhuber ccw->cda = (__u32) __pa(pfxdata); 5008e09f215SStefan Weinhuber memset(pfxdata, 0, sizeof(*pfxdata)); 501e4dbb0f2SStefan Haberland } 502e4dbb0f2SStefan Haberland 5038e09f215SStefan Weinhuber /* prefix data */ 504f3eb5384SStefan Weinhuber if (format > 1) { 505f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 506f3eb5384SStefan Weinhuber "PFX LRE unknown format 0x%x", format); 507f3eb5384SStefan Weinhuber BUG(); 508f3eb5384SStefan Weinhuber return -EINVAL; 509f3eb5384SStefan Weinhuber } 510f3eb5384SStefan Weinhuber pfxdata->format = format; 5114abb08c2SStefan Weinhuber pfxdata->base_address = basepriv->ned->unit_addr; 5124abb08c2SStefan Weinhuber pfxdata->base_lss = basepriv->ned->ID; 513f3eb5384SStefan Weinhuber pfxdata->validity.define_extent = 1; 5148e09f215SStefan Weinhuber 5158e09f215SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 5168e09f215SStefan Weinhuber if (startpriv->uid.type != UA_BASE_DEVICE) { 5178e09f215SStefan Weinhuber pfxdata->validity.verify_base = 1; 5188e09f215SStefan Weinhuber if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 5198e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 1; 5208e09f215SStefan Weinhuber } 5218e09f215SStefan Weinhuber 5228e09f215SStefan Weinhuber /* define extend data (mostly)*/ 5238e09f215SStefan Weinhuber switch (cmd) { 5248e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_HOME_ADDRESS: 5258e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_RECORD_ZERO: 5268e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ: 5278e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_MT: 5288e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD: 5298e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD_MT: 5308e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_KD: 5318e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_KD_MT: 5328e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_COUNT: 533f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 534f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 535f3eb5384SStefan Weinhuber break; 536e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_READ_TRACK: 537f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 538f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 539f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 540f3eb5384SStefan Weinhuber dedata->blk_size = 0; 5418e09f215SStefan Weinhuber break; 5428e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE: 5438e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_MT: 5448e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD: 5458e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD_MT: 546f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 547f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 5488e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 5498e09f215SStefan Weinhuber break; 5508e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD: 5518e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD_MT: 552f3eb5384SStefan Weinhuber dedata->attributes.operation = DASD_BYPASS_CACHE; 5538e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 5548e09f215SStefan Weinhuber break; 5558e09f215SStefan Weinhuber case DASD_ECKD_CCW_ERASE: 5568e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 5578e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 558f3eb5384SStefan Weinhuber dedata->mask.perm = 0x3; 559f3eb5384SStefan Weinhuber dedata->mask.auth = 0x1; 560f3eb5384SStefan Weinhuber dedata->attributes.operation = DASD_BYPASS_CACHE; 561f3eb5384SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 562f3eb5384SStefan Weinhuber break; 563e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_WRITE_FULL_TRACK: 564e4dbb0f2SStefan Haberland dedata->mask.perm = 0x03; 565e4dbb0f2SStefan Haberland dedata->attributes.operation = basepriv->attrib.operation; 566e4dbb0f2SStefan Haberland dedata->blk_size = 0; 567e4dbb0f2SStefan Haberland break; 568f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 569f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 570f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 571f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 5728e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 5738e09f215SStefan Weinhuber break; 5748e09f215SStefan Weinhuber default: 575f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 576f3eb5384SStefan Weinhuber "PFX LRE unknown opcode 0x%x", cmd); 577f3eb5384SStefan Weinhuber BUG(); 578f3eb5384SStefan Weinhuber return -EINVAL; 5798e09f215SStefan Weinhuber } 5808e09f215SStefan Weinhuber 581f3eb5384SStefan Weinhuber dedata->attributes.mode = 0x3; /* ECKD */ 5828e09f215SStefan Weinhuber 5838e09f215SStefan Weinhuber if ((basepriv->rdc_data.cu_type == 0x2105 || 5848e09f215SStefan Weinhuber basepriv->rdc_data.cu_type == 0x2107 || 5858e09f215SStefan Weinhuber basepriv->rdc_data.cu_type == 0x1750) 5868e09f215SStefan Weinhuber && !(basepriv->uses_cdl && trk < 2)) 587f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x40; /* Regular Data Format Mode */ 5888e09f215SStefan Weinhuber 589b44b0ab3SStefan Weinhuber heads = basepriv->rdc_data.trk_per_cyl; 590b44b0ab3SStefan Weinhuber begcyl = trk / heads; 591b44b0ab3SStefan Weinhuber beghead = trk % heads; 592b44b0ab3SStefan Weinhuber endcyl = totrk / heads; 593b44b0ab3SStefan Weinhuber endhead = totrk % heads; 5948e09f215SStefan Weinhuber 5958e09f215SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 596f3eb5384SStefan Weinhuber if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 597f3eb5384SStefan Weinhuber dedata->attributes.operation == DASD_SEQ_ACCESS) { 5988e09f215SStefan Weinhuber 599b44b0ab3SStefan Weinhuber if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 600b44b0ab3SStefan Weinhuber endcyl += basepriv->attrib.nr_cyl; 6018e09f215SStefan Weinhuber else 602b44b0ab3SStefan Weinhuber endcyl = (basepriv->real_cyl - 1); 6038e09f215SStefan Weinhuber } 6048e09f215SStefan Weinhuber 605f3eb5384SStefan Weinhuber set_ch_t(&dedata->beg_ext, begcyl, beghead); 606f3eb5384SStefan Weinhuber set_ch_t(&dedata->end_ext, endcyl, endhead); 607f3eb5384SStefan Weinhuber 608f3eb5384SStefan Weinhuber if (format == 1) { 609f3eb5384SStefan Weinhuber fill_LRE_data(lredata, trk, rec_on_trk, count, cmd, 610f3eb5384SStefan Weinhuber basedev, blksize, tlf); 611f3eb5384SStefan Weinhuber } 612f3eb5384SStefan Weinhuber 6138e09f215SStefan Weinhuber return rc; 6148e09f215SStefan Weinhuber } 6158e09f215SStefan Weinhuber 616f3eb5384SStefan Weinhuber static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 617f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 618f3eb5384SStefan Weinhuber struct dasd_device *basedev, struct dasd_device *startdev) 619f3eb5384SStefan Weinhuber { 620f3eb5384SStefan Weinhuber return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev, 621f3eb5384SStefan Weinhuber 0, 0, 0, 0, 0); 622f3eb5384SStefan Weinhuber } 623f3eb5384SStefan Weinhuber 6244d284cacSHeiko Carstens static void 625b44b0ab3SStefan Weinhuber locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk, 626b44b0ab3SStefan Weinhuber unsigned int rec_on_trk, int no_rec, int cmd, 6271da177e4SLinus Torvalds struct dasd_device * device, int reclen) 6281da177e4SLinus Torvalds { 629543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 6301da177e4SLinus Torvalds int sector; 6311da177e4SLinus Torvalds int dn, d; 6321da177e4SLinus Torvalds 6331da177e4SLinus Torvalds DBF_DEV_EVENT(DBF_INFO, device, 6341da177e4SLinus Torvalds "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", 6351da177e4SLinus Torvalds trk, rec_on_trk, no_rec, cmd, reclen); 6361da177e4SLinus Torvalds 6371da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; 6381da177e4SLinus Torvalds ccw->flags = 0; 6391da177e4SLinus Torvalds ccw->count = 16; 6401da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 6411da177e4SLinus Torvalds 6421da177e4SLinus Torvalds memset(data, 0, sizeof(struct LO_eckd_data)); 6431da177e4SLinus Torvalds sector = 0; 6441da177e4SLinus Torvalds if (rec_on_trk) { 6451da177e4SLinus Torvalds switch (private->rdc_data.dev_type) { 6461da177e4SLinus Torvalds case 0x3390: 6471da177e4SLinus Torvalds dn = ceil_quot(reclen + 6, 232); 6481da177e4SLinus Torvalds d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 6491da177e4SLinus Torvalds sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 6501da177e4SLinus Torvalds break; 6511da177e4SLinus Torvalds case 0x3380: 6521da177e4SLinus Torvalds d = 7 + ceil_quot(reclen + 12, 32); 6531da177e4SLinus Torvalds sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 6541da177e4SLinus Torvalds break; 6551da177e4SLinus Torvalds } 6561da177e4SLinus Torvalds } 6571da177e4SLinus Torvalds data->sector = sector; 6581da177e4SLinus Torvalds data->count = no_rec; 6591da177e4SLinus Torvalds switch (cmd) { 6601da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 6611da177e4SLinus Torvalds data->operation.orientation = 0x3; 6621da177e4SLinus Torvalds data->operation.operation = 0x03; 6631da177e4SLinus Torvalds break; 6641da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 6651da177e4SLinus Torvalds data->operation.orientation = 0x3; 6661da177e4SLinus Torvalds data->operation.operation = 0x16; 6671da177e4SLinus Torvalds break; 6681da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 6691da177e4SLinus Torvalds data->operation.orientation = 0x1; 6701da177e4SLinus Torvalds data->operation.operation = 0x03; 6711da177e4SLinus Torvalds data->count++; 6721da177e4SLinus Torvalds break; 6731da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 6741da177e4SLinus Torvalds data->operation.orientation = 0x3; 6751da177e4SLinus Torvalds data->operation.operation = 0x16; 6761da177e4SLinus Torvalds data->count++; 6771da177e4SLinus Torvalds break; 6781da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 6791da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 6801da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 6811da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 6821da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6831da177e4SLinus Torvalds data->length = reclen; 6841da177e4SLinus Torvalds data->operation.operation = 0x01; 6851da177e4SLinus Torvalds break; 6861da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 6871da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 6881da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6891da177e4SLinus Torvalds data->length = reclen; 6901da177e4SLinus Torvalds data->operation.operation = 0x03; 6911da177e4SLinus Torvalds break; 6921da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 6931da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 6941da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 6951da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 6961da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6971da177e4SLinus Torvalds data->length = reclen; 6981da177e4SLinus Torvalds data->operation.operation = 0x06; 6991da177e4SLinus Torvalds break; 7001da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 7011da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 7021da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 7031da177e4SLinus Torvalds data->length = reclen; 7041da177e4SLinus Torvalds data->operation.operation = 0x16; 7051da177e4SLinus Torvalds break; 7061da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_COUNT: 7071da177e4SLinus Torvalds data->operation.operation = 0x06; 7081da177e4SLinus Torvalds break; 7091da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 7101da177e4SLinus Torvalds data->length = reclen; 7111da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 7121da177e4SLinus Torvalds data->operation.operation = 0x0b; 7131da177e4SLinus Torvalds break; 7141da177e4SLinus Torvalds default: 715fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record " 716fc19f381SStefan Haberland "opcode 0x%x", cmd); 7171da177e4SLinus Torvalds } 718b44b0ab3SStefan Weinhuber set_ch_t(&data->seek_addr, 719b44b0ab3SStefan Weinhuber trk / private->rdc_data.trk_per_cyl, 720b44b0ab3SStefan Weinhuber trk % private->rdc_data.trk_per_cyl); 721b44b0ab3SStefan Weinhuber data->search_arg.cyl = data->seek_addr.cyl; 722b44b0ab3SStefan Weinhuber data->search_arg.head = data->seek_addr.head; 7231da177e4SLinus Torvalds data->search_arg.record = rec_on_trk; 7241da177e4SLinus Torvalds } 7251da177e4SLinus Torvalds 7261da177e4SLinus Torvalds /* 7271da177e4SLinus Torvalds * Returns 1 if the block is one of the special blocks that needs 7281da177e4SLinus Torvalds * to get read/written with the KD variant of the command. 7291da177e4SLinus Torvalds * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and 7301da177e4SLinus Torvalds * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. 7311da177e4SLinus Torvalds * Luckily the KD variants differ only by one bit (0x08) from the 7321da177e4SLinus Torvalds * normal variant. So don't wonder about code like: 7331da177e4SLinus Torvalds * if (dasd_eckd_cdl_special(blk_per_trk, recid)) 7341da177e4SLinus Torvalds * ccw->cmd_code |= 0x8; 7351da177e4SLinus Torvalds */ 7361da177e4SLinus Torvalds static inline int 7371da177e4SLinus Torvalds dasd_eckd_cdl_special(int blk_per_trk, int recid) 7381da177e4SLinus Torvalds { 7391da177e4SLinus Torvalds if (recid < 3) 7401da177e4SLinus Torvalds return 1; 7411da177e4SLinus Torvalds if (recid < blk_per_trk) 7421da177e4SLinus Torvalds return 0; 7431da177e4SLinus Torvalds if (recid < 2 * blk_per_trk) 7441da177e4SLinus Torvalds return 1; 7451da177e4SLinus Torvalds return 0; 7461da177e4SLinus Torvalds } 7471da177e4SLinus Torvalds 7481da177e4SLinus Torvalds /* 7491da177e4SLinus Torvalds * Returns the record size for the special blocks of the cdl format. 7501da177e4SLinus Torvalds * Only returns something useful if dasd_eckd_cdl_special is true 7511da177e4SLinus Torvalds * for the recid. 7521da177e4SLinus Torvalds */ 7531da177e4SLinus Torvalds static inline int 7541da177e4SLinus Torvalds dasd_eckd_cdl_reclen(int recid) 7551da177e4SLinus Torvalds { 7561da177e4SLinus Torvalds if (recid < 3) 7571da177e4SLinus Torvalds return sizes_trk0[recid]; 7581da177e4SLinus Torvalds return LABEL_SIZE; 7591da177e4SLinus Torvalds } 760b206181dSStefan Haberland /* create unique id from private structure. */ 761b206181dSStefan Haberland static void create_uid(struct dasd_eckd_private *private) 7623d052595SHorst Hummel { 7634abb08c2SStefan Weinhuber int count; 764b206181dSStefan Haberland struct dasd_uid *uid; 7653d052595SHorst Hummel 7662dedf0d9SStefan Haberland uid = &private->uid; 7673d052595SHorst Hummel memset(uid, 0, sizeof(struct dasd_uid)); 7684abb08c2SStefan Weinhuber memcpy(uid->vendor, private->ned->HDA_manufacturer, 7693d052595SHorst Hummel sizeof(uid->vendor) - 1); 7703d052595SHorst Hummel EBCASC(uid->vendor, sizeof(uid->vendor) - 1); 7714abb08c2SStefan Weinhuber memcpy(uid->serial, private->ned->HDA_location, 7723d052595SHorst Hummel sizeof(uid->serial) - 1); 7733d052595SHorst Hummel EBCASC(uid->serial, sizeof(uid->serial) - 1); 7744abb08c2SStefan Weinhuber uid->ssid = private->gneq->subsystemID; 775a419aef8SJoe Perches uid->real_unit_addr = private->ned->unit_addr; 7764abb08c2SStefan Weinhuber if (private->sneq) { 7774abb08c2SStefan Weinhuber uid->type = private->sneq->sua_flags; 7788e09f215SStefan Weinhuber if (uid->type == UA_BASE_PAV_ALIAS) 7794abb08c2SStefan Weinhuber uid->base_unit_addr = private->sneq->base_unit_addr; 7808e09f215SStefan Weinhuber } else { 7818e09f215SStefan Weinhuber uid->type = UA_BASE_DEVICE; 7828e09f215SStefan Weinhuber } 7834abb08c2SStefan Weinhuber if (private->vdsneq) { 7844abb08c2SStefan Weinhuber for (count = 0; count < 16; count++) { 7854abb08c2SStefan Weinhuber sprintf(uid->vduit+2*count, "%02x", 7864abb08c2SStefan Weinhuber private->vdsneq->uit[count]); 7874abb08c2SStefan Weinhuber } 7884abb08c2SStefan Weinhuber } 789b206181dSStefan Haberland } 790b206181dSStefan Haberland 791b206181dSStefan Haberland /* 792b206181dSStefan Haberland * Generate device unique id that specifies the physical device. 793b206181dSStefan Haberland */ 794b206181dSStefan Haberland static int dasd_eckd_generate_uid(struct dasd_device *device) 795b206181dSStefan Haberland { 796543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 797b206181dSStefan Haberland unsigned long flags; 798b206181dSStefan Haberland 799b206181dSStefan Haberland if (!private) 800b206181dSStefan Haberland return -ENODEV; 801b206181dSStefan Haberland if (!private->ned || !private->gneq) 802b206181dSStefan Haberland return -ENODEV; 803b206181dSStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 804b206181dSStefan Haberland create_uid(private); 8052dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 8063d052595SHorst Hummel return 0; 8073d052595SHorst Hummel } 8083d052595SHorst Hummel 8092dedf0d9SStefan Haberland static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid) 8102dedf0d9SStefan Haberland { 811543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 8122dedf0d9SStefan Haberland unsigned long flags; 8132dedf0d9SStefan Haberland 814543691a4SSebastian Ott if (private) { 8152dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 8162dedf0d9SStefan Haberland *uid = private->uid; 8172dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 8182dedf0d9SStefan Haberland return 0; 8192dedf0d9SStefan Haberland } 8202dedf0d9SStefan Haberland return -EINVAL; 8212dedf0d9SStefan Haberland } 8222dedf0d9SStefan Haberland 823b206181dSStefan Haberland /* 824b206181dSStefan Haberland * compare device UID with data of a given dasd_eckd_private structure 825b206181dSStefan Haberland * return 0 for match 826b206181dSStefan Haberland */ 827b206181dSStefan Haberland static int dasd_eckd_compare_path_uid(struct dasd_device *device, 828b206181dSStefan Haberland struct dasd_eckd_private *private) 829b206181dSStefan Haberland { 830b206181dSStefan Haberland struct dasd_uid device_uid; 831b206181dSStefan Haberland 832b206181dSStefan Haberland create_uid(private); 833b206181dSStefan Haberland dasd_eckd_get_uid(device, &device_uid); 834b206181dSStefan Haberland 835b206181dSStefan Haberland return memcmp(&device_uid, &private->uid, sizeof(struct dasd_uid)); 836b206181dSStefan Haberland } 837b206181dSStefan Haberland 838a4d26c6aSStefan Weinhuber static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device, 839a4d26c6aSStefan Weinhuber struct dasd_ccw_req *cqr, 840a4d26c6aSStefan Weinhuber __u8 *rcd_buffer, 841a4d26c6aSStefan Weinhuber __u8 lpm) 84217283b56SCornelia Huck { 84317283b56SCornelia Huck struct ccw1 *ccw; 844a4d26c6aSStefan Weinhuber /* 845a4d26c6aSStefan Weinhuber * buffer has to start with EBCDIC "V1.0" to show 846a4d26c6aSStefan Weinhuber * support for virtual device SNEQ 847a4d26c6aSStefan Weinhuber */ 848a4d26c6aSStefan Weinhuber rcd_buffer[0] = 0xE5; 849a4d26c6aSStefan Weinhuber rcd_buffer[1] = 0xF1; 850a4d26c6aSStefan Weinhuber rcd_buffer[2] = 0x4B; 851a4d26c6aSStefan Weinhuber rcd_buffer[3] = 0xF0; 85217283b56SCornelia Huck 85317283b56SCornelia Huck ccw = cqr->cpaddr; 854a4d26c6aSStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RCD; 855a4d26c6aSStefan Weinhuber ccw->flags = 0; 85617283b56SCornelia Huck ccw->cda = (__u32)(addr_t)rcd_buffer; 857a4d26c6aSStefan Weinhuber ccw->count = DASD_ECKD_RCD_DATA_SIZE; 858a4d26c6aSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 85917283b56SCornelia Huck 8608e09f215SStefan Weinhuber cqr->startdev = device; 8618e09f215SStefan Weinhuber cqr->memdev = device; 8628e09f215SStefan Weinhuber cqr->block = NULL; 86317283b56SCornelia Huck cqr->expires = 10*HZ; 86417283b56SCornelia Huck cqr->lpm = lpm; 865eb6e199bSStefan Weinhuber cqr->retries = 256; 8661aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 86717283b56SCornelia Huck cqr->status = DASD_CQR_FILLED; 868a4d26c6aSStefan Weinhuber set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 869a4d26c6aSStefan Weinhuber } 870a4d26c6aSStefan Weinhuber 8715915a873SStefan Haberland /* 8725915a873SStefan Haberland * Wakeup helper for read_conf 8735915a873SStefan Haberland * if the cqr is not done and needs some error recovery 8745915a873SStefan Haberland * the buffer has to be re-initialized with the EBCDIC "V1.0" 8755915a873SStefan Haberland * to show support for virtual device SNEQ 8765915a873SStefan Haberland */ 8775915a873SStefan Haberland static void read_conf_cb(struct dasd_ccw_req *cqr, void *data) 8785915a873SStefan Haberland { 8795915a873SStefan Haberland struct ccw1 *ccw; 8805915a873SStefan Haberland __u8 *rcd_buffer; 8815915a873SStefan Haberland 8825915a873SStefan Haberland if (cqr->status != DASD_CQR_DONE) { 8835915a873SStefan Haberland ccw = cqr->cpaddr; 8845915a873SStefan Haberland rcd_buffer = (__u8 *)((addr_t) ccw->cda); 8855915a873SStefan Haberland memset(rcd_buffer, 0, sizeof(*rcd_buffer)); 8865915a873SStefan Haberland 8875915a873SStefan Haberland rcd_buffer[0] = 0xE5; 8885915a873SStefan Haberland rcd_buffer[1] = 0xF1; 8895915a873SStefan Haberland rcd_buffer[2] = 0x4B; 8905915a873SStefan Haberland rcd_buffer[3] = 0xF0; 8915915a873SStefan Haberland } 8925915a873SStefan Haberland dasd_wakeup_cb(cqr, data); 8935915a873SStefan Haberland } 8945915a873SStefan Haberland 895a4d26c6aSStefan Weinhuber static int dasd_eckd_read_conf_immediately(struct dasd_device *device, 896a4d26c6aSStefan Weinhuber struct dasd_ccw_req *cqr, 897a4d26c6aSStefan Weinhuber __u8 *rcd_buffer, 898a4d26c6aSStefan Weinhuber __u8 lpm) 899a4d26c6aSStefan Weinhuber { 900a4d26c6aSStefan Weinhuber struct ciw *ciw; 901a4d26c6aSStefan Weinhuber int rc; 902a4d26c6aSStefan Weinhuber /* 903a4d26c6aSStefan Weinhuber * sanity check: scan for RCD command in extended SenseID data 904a4d26c6aSStefan Weinhuber * some devices do not support RCD 905a4d26c6aSStefan Weinhuber */ 906a4d26c6aSStefan Weinhuber ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 907a4d26c6aSStefan Weinhuber if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) 908a4d26c6aSStefan Weinhuber return -EOPNOTSUPP; 909a4d26c6aSStefan Weinhuber 910a4d26c6aSStefan Weinhuber dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm); 911a4d26c6aSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 9125a27e60dSStefan Weinhuber set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 913a4d26c6aSStefan Weinhuber cqr->retries = 5; 9145915a873SStefan Haberland cqr->callback = read_conf_cb; 915a4d26c6aSStefan Weinhuber rc = dasd_sleep_on_immediatly(cqr); 916a4d26c6aSStefan Weinhuber return rc; 91717283b56SCornelia Huck } 91817283b56SCornelia Huck 91917283b56SCornelia Huck static int dasd_eckd_read_conf_lpm(struct dasd_device *device, 92017283b56SCornelia Huck void **rcd_buffer, 92117283b56SCornelia Huck int *rcd_buffer_size, __u8 lpm) 92217283b56SCornelia Huck { 92317283b56SCornelia Huck struct ciw *ciw; 92417283b56SCornelia Huck char *rcd_buf = NULL; 92517283b56SCornelia Huck int ret; 92617283b56SCornelia Huck struct dasd_ccw_req *cqr; 92717283b56SCornelia Huck 92817283b56SCornelia Huck /* 929a4d26c6aSStefan Weinhuber * sanity check: scan for RCD command in extended SenseID data 930a4d26c6aSStefan Weinhuber * some devices do not support RCD 93117283b56SCornelia Huck */ 93217283b56SCornelia Huck ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 933a4d26c6aSStefan Weinhuber if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) { 93417283b56SCornelia Huck ret = -EOPNOTSUPP; 93517283b56SCornelia Huck goto out_error; 93617283b56SCornelia Huck } 937a4d26c6aSStefan Weinhuber rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA); 93817283b56SCornelia Huck if (!rcd_buf) { 93917283b56SCornelia Huck ret = -ENOMEM; 94017283b56SCornelia Huck goto out_error; 94117283b56SCornelia Huck } 942a4d26c6aSStefan Weinhuber cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, 943a4d26c6aSStefan Weinhuber 0, /* use rcd_buf as data ara */ 944a4d26c6aSStefan Weinhuber device); 94517283b56SCornelia Huck if (IS_ERR(cqr)) { 946a4d26c6aSStefan Weinhuber DBF_DEV_EVENT(DBF_WARNING, device, "%s", 947a4d26c6aSStefan Weinhuber "Could not allocate RCD request"); 948a4d26c6aSStefan Weinhuber ret = -ENOMEM; 94917283b56SCornelia Huck goto out_error; 95017283b56SCornelia Huck } 951a4d26c6aSStefan Weinhuber dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm); 9525915a873SStefan Haberland cqr->callback = read_conf_cb; 95317283b56SCornelia Huck ret = dasd_sleep_on(cqr); 95417283b56SCornelia Huck /* 95517283b56SCornelia Huck * on success we update the user input parms 95617283b56SCornelia Huck */ 9578e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 95817283b56SCornelia Huck if (ret) 95917283b56SCornelia Huck goto out_error; 96017283b56SCornelia Huck 961a4d26c6aSStefan Weinhuber *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE; 96217283b56SCornelia Huck *rcd_buffer = rcd_buf; 96317283b56SCornelia Huck return 0; 96417283b56SCornelia Huck out_error: 96517283b56SCornelia Huck kfree(rcd_buf); 96617283b56SCornelia Huck *rcd_buffer = NULL; 96717283b56SCornelia Huck *rcd_buffer_size = 0; 96817283b56SCornelia Huck return ret; 96917283b56SCornelia Huck } 97017283b56SCornelia Huck 9714abb08c2SStefan Weinhuber static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private) 9724abb08c2SStefan Weinhuber { 9734abb08c2SStefan Weinhuber 9744abb08c2SStefan Weinhuber struct dasd_sneq *sneq; 9754abb08c2SStefan Weinhuber int i, count; 9764abb08c2SStefan Weinhuber 9774abb08c2SStefan Weinhuber private->ned = NULL; 9784abb08c2SStefan Weinhuber private->sneq = NULL; 9794abb08c2SStefan Weinhuber private->vdsneq = NULL; 9804abb08c2SStefan Weinhuber private->gneq = NULL; 9814abb08c2SStefan Weinhuber count = private->conf_len / sizeof(struct dasd_sneq); 9824abb08c2SStefan Weinhuber sneq = (struct dasd_sneq *)private->conf_data; 9834abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 9844abb08c2SStefan Weinhuber if (sneq->flags.identifier == 1 && sneq->format == 1) 9854abb08c2SStefan Weinhuber private->sneq = sneq; 9864abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 1 && sneq->format == 4) 9874abb08c2SStefan Weinhuber private->vdsneq = (struct vd_sneq *)sneq; 9884abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 2) 9894abb08c2SStefan Weinhuber private->gneq = (struct dasd_gneq *)sneq; 9904abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 3 && sneq->res1 == 1) 9914abb08c2SStefan Weinhuber private->ned = (struct dasd_ned *)sneq; 9924abb08c2SStefan Weinhuber sneq++; 9934abb08c2SStefan Weinhuber } 9944abb08c2SStefan Weinhuber if (!private->ned || !private->gneq) { 9954abb08c2SStefan Weinhuber private->ned = NULL; 9964abb08c2SStefan Weinhuber private->sneq = NULL; 9974abb08c2SStefan Weinhuber private->vdsneq = NULL; 9984abb08c2SStefan Weinhuber private->gneq = NULL; 9994abb08c2SStefan Weinhuber return -EINVAL; 10004abb08c2SStefan Weinhuber } 10014abb08c2SStefan Weinhuber return 0; 10024abb08c2SStefan Weinhuber 10034abb08c2SStefan Weinhuber }; 10044abb08c2SStefan Weinhuber 10054abb08c2SStefan Weinhuber static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len) 10064abb08c2SStefan Weinhuber { 10074abb08c2SStefan Weinhuber struct dasd_gneq *gneq; 10084abb08c2SStefan Weinhuber int i, count, found; 10094abb08c2SStefan Weinhuber 10104abb08c2SStefan Weinhuber count = conf_len / sizeof(*gneq); 10114abb08c2SStefan Weinhuber gneq = (struct dasd_gneq *)conf_data; 10124abb08c2SStefan Weinhuber found = 0; 10134abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 10144abb08c2SStefan Weinhuber if (gneq->flags.identifier == 2) { 10154abb08c2SStefan Weinhuber found = 1; 10164abb08c2SStefan Weinhuber break; 10174abb08c2SStefan Weinhuber } 10184abb08c2SStefan Weinhuber gneq++; 10194abb08c2SStefan Weinhuber } 10204abb08c2SStefan Weinhuber if (found) 10214abb08c2SStefan Weinhuber return ((char *)gneq)[18] & 0x07; 10224abb08c2SStefan Weinhuber else 10234abb08c2SStefan Weinhuber return 0; 10244abb08c2SStefan Weinhuber } 10254abb08c2SStefan Weinhuber 1026c7c0c9deSStefan Haberland static void dasd_eckd_clear_conf_data(struct dasd_device *device) 1027c7c0c9deSStefan Haberland { 1028543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1029c7c0c9deSStefan Haberland int i; 1030c7c0c9deSStefan Haberland 1031c7c0c9deSStefan Haberland private->conf_data = NULL; 1032c7c0c9deSStefan Haberland private->conf_len = 0; 1033c7c0c9deSStefan Haberland for (i = 0; i < 8; i++) { 1034c7c0c9deSStefan Haberland kfree(private->path_conf_data[i]); 1035c7c0c9deSStefan Haberland private->path_conf_data[i] = NULL; 1036c7c0c9deSStefan Haberland } 1037c7c0c9deSStefan Haberland } 1038c7c0c9deSStefan Haberland 1039c7c0c9deSStefan Haberland 10404abb08c2SStefan Weinhuber static int dasd_eckd_read_conf(struct dasd_device *device) 10411da177e4SLinus Torvalds { 10421da177e4SLinus Torvalds void *conf_data; 10431da177e4SLinus Torvalds int conf_len, conf_data_saved; 1044b179b037SStefan Haberland int rc, path_err, pos; 1045a4d26c6aSStefan Weinhuber __u8 lpm, opm; 1046b206181dSStefan Haberland struct dasd_eckd_private *private, path_private; 1047a4d26c6aSStefan Weinhuber struct dasd_path *path_data; 1048b206181dSStefan Haberland struct dasd_uid *uid; 1049b206181dSStefan Haberland char print_path_uid[60], print_device_uid[60]; 10501da177e4SLinus Torvalds 1051543691a4SSebastian Ott private = device->private; 1052a4d26c6aSStefan Weinhuber path_data = &device->path_data; 1053a4d26c6aSStefan Weinhuber opm = ccw_device_get_path_mask(device->cdev); 10541da177e4SLinus Torvalds conf_data_saved = 0; 105555d3a85cSStefan Haberland path_err = 0; 10561da177e4SLinus Torvalds /* get configuration data per operational path */ 10571da177e4SLinus Torvalds for (lpm = 0x80; lpm; lpm>>= 1) { 1058b206181dSStefan Haberland if (!(lpm & opm)) 1059b206181dSStefan Haberland continue; 106017283b56SCornelia Huck rc = dasd_eckd_read_conf_lpm(device, &conf_data, 10611da177e4SLinus Torvalds &conf_len, lpm); 10621da177e4SLinus Torvalds if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ 1063b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 10641da177e4SLinus Torvalds "Read configuration data returned " 1065b8ed5dd5SStefan Haberland "error %d", rc); 10661da177e4SLinus Torvalds return rc; 10671da177e4SLinus Torvalds } 10681da177e4SLinus Torvalds if (conf_data == NULL) { 1069b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1070b8ed5dd5SStefan Haberland "No configuration data " 1071b8ed5dd5SStefan Haberland "retrieved"); 1072a4d26c6aSStefan Weinhuber /* no further analysis possible */ 1073a4d26c6aSStefan Weinhuber path_data->opm |= lpm; 1074d133a960SGabriel Craciunescu continue; /* no error */ 10751da177e4SLinus Torvalds } 10761da177e4SLinus Torvalds /* save first valid configuration data */ 10771da177e4SLinus Torvalds if (!conf_data_saved) { 1078c7c0c9deSStefan Haberland /* initially clear previously stored conf_data */ 1079c7c0c9deSStefan Haberland dasd_eckd_clear_conf_data(device); 10804abb08c2SStefan Weinhuber private->conf_data = conf_data; 10814abb08c2SStefan Weinhuber private->conf_len = conf_len; 10824abb08c2SStefan Weinhuber if (dasd_eckd_identify_conf_parts(private)) { 10834abb08c2SStefan Weinhuber private->conf_data = NULL; 10844abb08c2SStefan Weinhuber private->conf_len = 0; 10854abb08c2SStefan Weinhuber kfree(conf_data); 10864abb08c2SStefan Weinhuber continue; 10874abb08c2SStefan Weinhuber } 1088c7c0c9deSStefan Haberland pos = pathmask_to_pos(lpm); 1089c7c0c9deSStefan Haberland /* store per path conf_data */ 1090c7c0c9deSStefan Haberland private->path_conf_data[pos] = 1091c7c0c9deSStefan Haberland (struct dasd_conf_data *) conf_data; 1092b206181dSStefan Haberland /* 1093b206181dSStefan Haberland * build device UID that other path data 1094b206181dSStefan Haberland * can be compared to it 1095b206181dSStefan Haberland */ 1096b206181dSStefan Haberland dasd_eckd_generate_uid(device); 10971da177e4SLinus Torvalds conf_data_saved++; 1098b206181dSStefan Haberland } else { 1099b206181dSStefan Haberland path_private.conf_data = conf_data; 1100b206181dSStefan Haberland path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1101b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts( 1102b206181dSStefan Haberland &path_private)) { 1103b206181dSStefan Haberland path_private.conf_data = NULL; 1104b206181dSStefan Haberland path_private.conf_len = 0; 1105b206181dSStefan Haberland kfree(conf_data); 1106b206181dSStefan Haberland continue; 1107b206181dSStefan Haberland } 1108b206181dSStefan Haberland if (dasd_eckd_compare_path_uid( 1109b206181dSStefan Haberland device, &path_private)) { 1110b206181dSStefan Haberland uid = &path_private.uid; 1111b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1112b206181dSStefan Haberland snprintf(print_path_uid, 1113b206181dSStefan Haberland sizeof(print_path_uid), 1114b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1115b206181dSStefan Haberland uid->vendor, uid->serial, 1116b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1117b206181dSStefan Haberland uid->vduit); 1118b206181dSStefan Haberland else 1119b206181dSStefan Haberland snprintf(print_path_uid, 1120b206181dSStefan Haberland sizeof(print_path_uid), 1121b206181dSStefan Haberland "%s.%s.%04x.%02x", 1122b206181dSStefan Haberland uid->vendor, uid->serial, 1123b206181dSStefan Haberland uid->ssid, 1124b206181dSStefan Haberland uid->real_unit_addr); 1125b206181dSStefan Haberland uid = &private->uid; 1126b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1127b206181dSStefan Haberland snprintf(print_device_uid, 1128b206181dSStefan Haberland sizeof(print_device_uid), 1129b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1130b206181dSStefan Haberland uid->vendor, uid->serial, 1131b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1132b206181dSStefan Haberland uid->vduit); 1133b206181dSStefan Haberland else 1134b206181dSStefan Haberland snprintf(print_device_uid, 1135b206181dSStefan Haberland sizeof(print_device_uid), 1136b206181dSStefan Haberland "%s.%s.%04x.%02x", 1137b206181dSStefan Haberland uid->vendor, uid->serial, 1138b206181dSStefan Haberland uid->ssid, 1139b206181dSStefan Haberland uid->real_unit_addr); 1140b206181dSStefan Haberland dev_err(&device->cdev->dev, 1141b206181dSStefan Haberland "Not all channel paths lead to " 1142b206181dSStefan Haberland "the same device, path %02X leads to " 1143b206181dSStefan Haberland "device %s instead of %s\n", lpm, 1144b206181dSStefan Haberland print_path_uid, print_device_uid); 114555d3a85cSStefan Haberland path_err = -EINVAL; 11465db8440cSStefan Haberland path_data->cablepm |= lpm; 114755d3a85cSStefan Haberland continue; 1148b206181dSStefan Haberland } 1149c7c0c9deSStefan Haberland pos = pathmask_to_pos(lpm); 1150c7c0c9deSStefan Haberland /* store per path conf_data */ 1151c7c0c9deSStefan Haberland private->path_conf_data[pos] = 1152c7c0c9deSStefan Haberland (struct dasd_conf_data *) conf_data; 1153b206181dSStefan Haberland path_private.conf_data = NULL; 1154b206181dSStefan Haberland path_private.conf_len = 0; 11551da177e4SLinus Torvalds } 11564abb08c2SStefan Weinhuber switch (dasd_eckd_path_access(conf_data, conf_len)) { 11571da177e4SLinus Torvalds case 0x02: 11581da177e4SLinus Torvalds path_data->npm |= lpm; 11591da177e4SLinus Torvalds break; 11601da177e4SLinus Torvalds case 0x03: 11611da177e4SLinus Torvalds path_data->ppm |= lpm; 11621da177e4SLinus Torvalds break; 11631da177e4SLinus Torvalds } 1164ccc0e7dcSStefan Haberland if (!path_data->opm) { 1165ccc0e7dcSStefan Haberland path_data->opm = lpm; 1166ccc0e7dcSStefan Haberland dasd_generic_path_operational(device); 1167ccc0e7dcSStefan Haberland } else { 1168a4d26c6aSStefan Weinhuber path_data->opm |= lpm; 1169ccc0e7dcSStefan Haberland } 11705db8440cSStefan Haberland /* 11715db8440cSStefan Haberland * if the path is used 11725db8440cSStefan Haberland * it should not be in one of the negative lists 11735db8440cSStefan Haberland */ 11745db8440cSStefan Haberland path_data->cablepm &= ~lpm; 11755db8440cSStefan Haberland path_data->hpfpm &= ~lpm; 11765db8440cSStefan Haberland path_data->cuirpm &= ~lpm; 11771da177e4SLinus Torvalds } 1178b206181dSStefan Haberland 117955d3a85cSStefan Haberland return path_err; 11801da177e4SLinus Torvalds } 11811da177e4SLinus Torvalds 1182a4d26c6aSStefan Weinhuber static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm) 1183a4d26c6aSStefan Weinhuber { 1184543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1185a4d26c6aSStefan Weinhuber int mdc; 1186a4d26c6aSStefan Weinhuber u32 fcx_max_data; 1187a4d26c6aSStefan Weinhuber 1188a4d26c6aSStefan Weinhuber if (private->fcx_max_data) { 1189a4d26c6aSStefan Weinhuber mdc = ccw_device_get_mdc(device->cdev, lpm); 1190a4d26c6aSStefan Weinhuber if ((mdc < 0)) { 1191a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1192a4d26c6aSStefan Weinhuber "Detecting the maximum data size for zHPF " 1193a4d26c6aSStefan Weinhuber "requests failed (rc=%d) for a new path %x\n", 1194a4d26c6aSStefan Weinhuber mdc, lpm); 1195a4d26c6aSStefan Weinhuber return mdc; 1196a4d26c6aSStefan Weinhuber } 1197a4d26c6aSStefan Weinhuber fcx_max_data = mdc * FCX_MAX_DATA_FACTOR; 1198a4d26c6aSStefan Weinhuber if (fcx_max_data < private->fcx_max_data) { 1199a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1200a4d26c6aSStefan Weinhuber "The maximum data size for zHPF requests %u " 1201a4d26c6aSStefan Weinhuber "on a new path %x is below the active maximum " 1202a4d26c6aSStefan Weinhuber "%u\n", fcx_max_data, lpm, 1203a4d26c6aSStefan Weinhuber private->fcx_max_data); 1204a4d26c6aSStefan Weinhuber return -EACCES; 1205a4d26c6aSStefan Weinhuber } 1206a4d26c6aSStefan Weinhuber } 1207a4d26c6aSStefan Weinhuber return 0; 1208a4d26c6aSStefan Weinhuber } 1209a4d26c6aSStefan Weinhuber 1210b206181dSStefan Haberland static int rebuild_device_uid(struct dasd_device *device, 1211b206181dSStefan Haberland struct path_verification_work_data *data) 1212b206181dSStefan Haberland { 1213543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1214543691a4SSebastian Ott struct dasd_path *path_data = &device->path_data; 1215543691a4SSebastian Ott __u8 lpm, opm = path_data->opm; 1216543691a4SSebastian Ott int rc = -ENODEV; 1217b206181dSStefan Haberland 1218b206181dSStefan Haberland for (lpm = 0x80; lpm; lpm >>= 1) { 1219b206181dSStefan Haberland if (!(lpm & opm)) 1220b206181dSStefan Haberland continue; 1221b206181dSStefan Haberland memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1222b206181dSStefan Haberland memset(&data->cqr, 0, sizeof(data->cqr)); 1223b206181dSStefan Haberland data->cqr.cpaddr = &data->ccw; 1224b206181dSStefan Haberland rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1225b206181dSStefan Haberland data->rcd_buffer, 1226b206181dSStefan Haberland lpm); 1227b206181dSStefan Haberland 1228b206181dSStefan Haberland if (rc) { 1229b206181dSStefan Haberland if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */ 1230b206181dSStefan Haberland continue; 1231b206181dSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1232b206181dSStefan Haberland "Read configuration data " 1233b206181dSStefan Haberland "returned error %d", rc); 1234b206181dSStefan Haberland break; 1235b206181dSStefan Haberland } 1236b206181dSStefan Haberland memcpy(private->conf_data, data->rcd_buffer, 1237b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE); 1238b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts(private)) { 1239b206181dSStefan Haberland rc = -ENODEV; 1240b206181dSStefan Haberland } else /* first valid path is enough */ 1241b206181dSStefan Haberland break; 1242b206181dSStefan Haberland } 1243b206181dSStefan Haberland 1244b206181dSStefan Haberland if (!rc) 1245b206181dSStefan Haberland rc = dasd_eckd_generate_uid(device); 1246b206181dSStefan Haberland 1247b206181dSStefan Haberland return rc; 1248b206181dSStefan Haberland } 1249b206181dSStefan Haberland 1250a4d26c6aSStefan Weinhuber static void do_path_verification_work(struct work_struct *work) 1251a4d26c6aSStefan Weinhuber { 1252a4d26c6aSStefan Weinhuber struct path_verification_work_data *data; 1253a4d26c6aSStefan Weinhuber struct dasd_device *device; 1254b206181dSStefan Haberland struct dasd_eckd_private path_private; 1255b206181dSStefan Haberland struct dasd_uid *uid; 1256b206181dSStefan Haberland __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE]; 12575db8440cSStefan Haberland __u8 lpm, opm, npm, ppm, epm, hpfpm, cablepm; 1258a4d26c6aSStefan Weinhuber unsigned long flags; 1259b206181dSStefan Haberland char print_uid[60]; 1260a4d26c6aSStefan Weinhuber int rc; 1261a4d26c6aSStefan Weinhuber 1262a4d26c6aSStefan Weinhuber data = container_of(work, struct path_verification_work_data, worker); 1263a4d26c6aSStefan Weinhuber device = data->device; 1264a4d26c6aSStefan Weinhuber 1265c8d1c0ffSStefan Haberland /* delay path verification until device was resumed */ 1266c8d1c0ffSStefan Haberland if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 1267c8d1c0ffSStefan Haberland schedule_work(work); 1268c8d1c0ffSStefan Haberland return; 1269c8d1c0ffSStefan Haberland } 12701eb38023SStefan Haberland /* check if path verification already running and delay if so */ 12711eb38023SStefan Haberland if (test_and_set_bit(DASD_FLAG_PATH_VERIFY, &device->flags)) { 12721eb38023SStefan Haberland schedule_work(work); 12731eb38023SStefan Haberland return; 12741eb38023SStefan Haberland } 1275a4d26c6aSStefan Weinhuber opm = 0; 1276a4d26c6aSStefan Weinhuber npm = 0; 1277a4d26c6aSStefan Weinhuber ppm = 0; 1278a4d26c6aSStefan Weinhuber epm = 0; 12795db8440cSStefan Haberland hpfpm = 0; 12805db8440cSStefan Haberland cablepm = 0; 12815db8440cSStefan Haberland 1282a4d26c6aSStefan Weinhuber for (lpm = 0x80; lpm; lpm >>= 1) { 1283b206181dSStefan Haberland if (!(lpm & data->tbvpm)) 1284b206181dSStefan Haberland continue; 1285b206181dSStefan Haberland memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1286a4d26c6aSStefan Weinhuber memset(&data->cqr, 0, sizeof(data->cqr)); 1287a4d26c6aSStefan Weinhuber data->cqr.cpaddr = &data->ccw; 1288a4d26c6aSStefan Weinhuber rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1289a4d26c6aSStefan Weinhuber data->rcd_buffer, 1290a4d26c6aSStefan Weinhuber lpm); 1291a4d26c6aSStefan Weinhuber if (!rc) { 1292a4d26c6aSStefan Weinhuber switch (dasd_eckd_path_access(data->rcd_buffer, 1293b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE) 1294b206181dSStefan Haberland ) { 1295a4d26c6aSStefan Weinhuber case 0x02: 1296a4d26c6aSStefan Weinhuber npm |= lpm; 1297a4d26c6aSStefan Weinhuber break; 1298a4d26c6aSStefan Weinhuber case 0x03: 1299a4d26c6aSStefan Weinhuber ppm |= lpm; 1300a4d26c6aSStefan Weinhuber break; 1301a4d26c6aSStefan Weinhuber } 1302a4d26c6aSStefan Weinhuber opm |= lpm; 1303a4d26c6aSStefan Weinhuber } else if (rc == -EOPNOTSUPP) { 1304a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1305a4d26c6aSStefan Weinhuber "path verification: No configuration " 1306a4d26c6aSStefan Weinhuber "data retrieved"); 1307a4d26c6aSStefan Weinhuber opm |= lpm; 1308a4d26c6aSStefan Weinhuber } else if (rc == -EAGAIN) { 1309a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1310a4d26c6aSStefan Weinhuber "path verification: device is stopped," 1311a4d26c6aSStefan Weinhuber " try again later"); 1312a4d26c6aSStefan Weinhuber epm |= lpm; 1313a4d26c6aSStefan Weinhuber } else { 1314a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1315a4d26c6aSStefan Weinhuber "Reading device feature codes failed " 1316a4d26c6aSStefan Weinhuber "(rc=%d) for new path %x\n", rc, lpm); 1317a4d26c6aSStefan Weinhuber continue; 1318a4d26c6aSStefan Weinhuber } 1319a4d26c6aSStefan Weinhuber if (verify_fcx_max_data(device, lpm)) { 1320a4d26c6aSStefan Weinhuber opm &= ~lpm; 1321a4d26c6aSStefan Weinhuber npm &= ~lpm; 1322a4d26c6aSStefan Weinhuber ppm &= ~lpm; 13235db8440cSStefan Haberland hpfpm |= lpm; 1324b206181dSStefan Haberland continue; 1325b206181dSStefan Haberland } 1326b206181dSStefan Haberland 1327b206181dSStefan Haberland /* 1328b206181dSStefan Haberland * save conf_data for comparison after 1329b206181dSStefan Haberland * rebuild_device_uid may have changed 1330b206181dSStefan Haberland * the original data 1331b206181dSStefan Haberland */ 1332b206181dSStefan Haberland memcpy(&path_rcd_buf, data->rcd_buffer, 1333b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE); 1334b206181dSStefan Haberland path_private.conf_data = (void *) &path_rcd_buf; 1335b206181dSStefan Haberland path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1336b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts(&path_private)) { 1337b206181dSStefan Haberland path_private.conf_data = NULL; 1338b206181dSStefan Haberland path_private.conf_len = 0; 1339b206181dSStefan Haberland continue; 1340b206181dSStefan Haberland } 1341b206181dSStefan Haberland 1342b206181dSStefan Haberland /* 1343b206181dSStefan Haberland * compare path UID with device UID only if at least 1344b206181dSStefan Haberland * one valid path is left 1345b206181dSStefan Haberland * in other case the device UID may have changed and 1346b206181dSStefan Haberland * the first working path UID will be used as device UID 1347b206181dSStefan Haberland */ 1348b206181dSStefan Haberland if (device->path_data.opm && 1349b206181dSStefan Haberland dasd_eckd_compare_path_uid(device, &path_private)) { 1350b206181dSStefan Haberland /* 1351b206181dSStefan Haberland * the comparison was not successful 1352b206181dSStefan Haberland * rebuild the device UID with at least one 1353b206181dSStefan Haberland * known path in case a z/VM hyperswap command 1354b206181dSStefan Haberland * has changed the device 1355b206181dSStefan Haberland * 1356b206181dSStefan Haberland * after this compare again 1357b206181dSStefan Haberland * 1358b206181dSStefan Haberland * if either the rebuild or the recompare fails 1359b206181dSStefan Haberland * the path can not be used 1360b206181dSStefan Haberland */ 1361b206181dSStefan Haberland if (rebuild_device_uid(device, data) || 1362b206181dSStefan Haberland dasd_eckd_compare_path_uid( 1363b206181dSStefan Haberland device, &path_private)) { 1364b206181dSStefan Haberland uid = &path_private.uid; 1365b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1366b206181dSStefan Haberland snprintf(print_uid, sizeof(print_uid), 1367b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1368b206181dSStefan Haberland uid->vendor, uid->serial, 1369b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1370b206181dSStefan Haberland uid->vduit); 1371b206181dSStefan Haberland else 1372b206181dSStefan Haberland snprintf(print_uid, sizeof(print_uid), 1373b206181dSStefan Haberland "%s.%s.%04x.%02x", 1374b206181dSStefan Haberland uid->vendor, uid->serial, 1375b206181dSStefan Haberland uid->ssid, 1376b206181dSStefan Haberland uid->real_unit_addr); 1377b206181dSStefan Haberland dev_err(&device->cdev->dev, 1378b206181dSStefan Haberland "The newly added channel path %02X " 1379b206181dSStefan Haberland "will not be used because it leads " 1380b206181dSStefan Haberland "to a different device %s\n", 1381b206181dSStefan Haberland lpm, print_uid); 1382b206181dSStefan Haberland opm &= ~lpm; 1383b206181dSStefan Haberland npm &= ~lpm; 1384b206181dSStefan Haberland ppm &= ~lpm; 13855db8440cSStefan Haberland cablepm |= lpm; 1386b206181dSStefan Haberland continue; 1387a4d26c6aSStefan Weinhuber } 1388a4d26c6aSStefan Weinhuber } 1389b206181dSStefan Haberland 1390a4d26c6aSStefan Weinhuber /* 1391a4d26c6aSStefan Weinhuber * There is a small chance that a path is lost again between 1392a4d26c6aSStefan Weinhuber * above path verification and the following modification of 1393a4d26c6aSStefan Weinhuber * the device opm mask. We could avoid that race here by using 1394a4d26c6aSStefan Weinhuber * yet another path mask, but we rather deal with this unlikely 1395a4d26c6aSStefan Weinhuber * situation in dasd_start_IO. 1396a4d26c6aSStefan Weinhuber */ 1397a4d26c6aSStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1398a4d26c6aSStefan Weinhuber if (!device->path_data.opm && opm) { 1399a4d26c6aSStefan Weinhuber device->path_data.opm = opm; 14005db8440cSStefan Haberland device->path_data.cablepm &= ~opm; 14015db8440cSStefan Haberland device->path_data.cuirpm &= ~opm; 14025db8440cSStefan Haberland device->path_data.hpfpm &= ~opm; 1403a4d26c6aSStefan Weinhuber dasd_generic_path_operational(device); 14045db8440cSStefan Haberland } else { 1405a4d26c6aSStefan Weinhuber device->path_data.opm |= opm; 14065db8440cSStefan Haberland device->path_data.cablepm &= ~opm; 14075db8440cSStefan Haberland device->path_data.cuirpm &= ~opm; 14085db8440cSStefan Haberland device->path_data.hpfpm &= ~opm; 14095db8440cSStefan Haberland } 1410a4d26c6aSStefan Weinhuber device->path_data.npm |= npm; 1411a4d26c6aSStefan Weinhuber device->path_data.ppm |= ppm; 1412a4d26c6aSStefan Weinhuber device->path_data.tbvpm |= epm; 14135db8440cSStefan Haberland device->path_data.cablepm |= cablepm; 14145db8440cSStefan Haberland device->path_data.hpfpm |= hpfpm; 1415a4d26c6aSStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1416b206181dSStefan Haberland } 14171eb38023SStefan Haberland clear_bit(DASD_FLAG_PATH_VERIFY, &device->flags); 1418a4d26c6aSStefan Weinhuber dasd_put_device(device); 1419a4d26c6aSStefan Weinhuber if (data->isglobal) 1420a4d26c6aSStefan Weinhuber mutex_unlock(&dasd_path_verification_mutex); 1421a4d26c6aSStefan Weinhuber else 1422a4d26c6aSStefan Weinhuber kfree(data); 1423a4d26c6aSStefan Weinhuber } 1424a4d26c6aSStefan Weinhuber 1425a4d26c6aSStefan Weinhuber static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm) 1426a4d26c6aSStefan Weinhuber { 1427a4d26c6aSStefan Weinhuber struct path_verification_work_data *data; 1428a4d26c6aSStefan Weinhuber 1429a4d26c6aSStefan Weinhuber data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA); 1430a4d26c6aSStefan Weinhuber if (!data) { 1431a4d26c6aSStefan Weinhuber if (mutex_trylock(&dasd_path_verification_mutex)) { 1432a4d26c6aSStefan Weinhuber data = path_verification_worker; 1433a4d26c6aSStefan Weinhuber data->isglobal = 1; 1434a4d26c6aSStefan Weinhuber } else 1435a4d26c6aSStefan Weinhuber return -ENOMEM; 1436a4d26c6aSStefan Weinhuber } else { 1437a4d26c6aSStefan Weinhuber memset(data, 0, sizeof(*data)); 1438a4d26c6aSStefan Weinhuber data->isglobal = 0; 1439a4d26c6aSStefan Weinhuber } 1440a4d26c6aSStefan Weinhuber INIT_WORK(&data->worker, do_path_verification_work); 1441a4d26c6aSStefan Weinhuber dasd_get_device(device); 1442a4d26c6aSStefan Weinhuber data->device = device; 1443a4d26c6aSStefan Weinhuber data->tbvpm = lpm; 1444a4d26c6aSStefan Weinhuber schedule_work(&data->worker); 1445a4d26c6aSStefan Weinhuber return 0; 1446a4d26c6aSStefan Weinhuber } 1447a4d26c6aSStefan Weinhuber 14488e09f215SStefan Weinhuber static int dasd_eckd_read_features(struct dasd_device *device) 14498e09f215SStefan Weinhuber { 1450543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 14518e09f215SStefan Weinhuber struct dasd_psf_prssd_data *prssdp; 14528e09f215SStefan Weinhuber struct dasd_rssd_features *features; 14538e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 14548e09f215SStefan Weinhuber struct ccw1 *ccw; 14558e09f215SStefan Weinhuber int rc; 14568e09f215SStefan Weinhuber 145768d1e5f0SStefan Weinhuber memset(&private->features, 0, sizeof(struct dasd_rssd_features)); 145868b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 14598e09f215SStefan Weinhuber (sizeof(struct dasd_psf_prssd_data) + 14608e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)), 14618e09f215SStefan Weinhuber device); 14628e09f215SStefan Weinhuber if (IS_ERR(cqr)) { 1463b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " 1464b8ed5dd5SStefan Haberland "allocate initialization request"); 14658e09f215SStefan Weinhuber return PTR_ERR(cqr); 14668e09f215SStefan Weinhuber } 14678e09f215SStefan Weinhuber cqr->startdev = device; 14688e09f215SStefan Weinhuber cqr->memdev = device; 14698e09f215SStefan Weinhuber cqr->block = NULL; 1470eb6e199bSStefan Weinhuber cqr->retries = 256; 14718e09f215SStefan Weinhuber cqr->expires = 10 * HZ; 14728e09f215SStefan Weinhuber 14738e09f215SStefan Weinhuber /* Prepare for Read Subsystem Data */ 14748e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 14758e09f215SStefan Weinhuber memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 14768e09f215SStefan Weinhuber prssdp->order = PSF_ORDER_PRSSD; 14778e09f215SStefan Weinhuber prssdp->suborder = 0x41; /* Read Feature Codes */ 14788e09f215SStefan Weinhuber /* all other bytes of prssdp must be zero */ 14798e09f215SStefan Weinhuber 14808e09f215SStefan Weinhuber ccw = cqr->cpaddr; 14818e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PSF; 14828e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_psf_prssd_data); 14838e09f215SStefan Weinhuber ccw->flags |= CCW_FLAG_CC; 14848e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) prssdp; 14858e09f215SStefan Weinhuber 14868e09f215SStefan Weinhuber /* Read Subsystem Data - feature codes */ 14878e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 14888e09f215SStefan Weinhuber memset(features, 0, sizeof(struct dasd_rssd_features)); 14898e09f215SStefan Weinhuber 14908e09f215SStefan Weinhuber ccw++; 14918e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RSSD; 14928e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_rssd_features); 14938e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) features; 14948e09f215SStefan Weinhuber 14951aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 14968e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 14978e09f215SStefan Weinhuber rc = dasd_sleep_on(cqr); 14988e09f215SStefan Weinhuber if (rc == 0) { 14998e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 15008e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 15018e09f215SStefan Weinhuber memcpy(&private->features, features, 15028e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)); 150368d1e5f0SStefan Weinhuber } else 150468d1e5f0SStefan Weinhuber dev_warn(&device->cdev->dev, "Reading device feature codes" 150568d1e5f0SStefan Weinhuber " failed with rc=%d\n", rc); 15068e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 15078e09f215SStefan Weinhuber return rc; 15088e09f215SStefan Weinhuber } 15098e09f215SStefan Weinhuber 15108e09f215SStefan Weinhuber 15113d052595SHorst Hummel /* 151240545573SHorst Hummel * Build CP for Perform Subsystem Function - SSC. 151340545573SHorst Hummel */ 1514f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, 1515f3eb5384SStefan Weinhuber int enable_pav) 151640545573SHorst Hummel { 151740545573SHorst Hummel struct dasd_ccw_req *cqr; 151840545573SHorst Hummel struct dasd_psf_ssc_data *psf_ssc_data; 151940545573SHorst Hummel struct ccw1 *ccw; 152040545573SHorst Hummel 152168b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 152240545573SHorst Hummel sizeof(struct dasd_psf_ssc_data), 152340545573SHorst Hummel device); 152440545573SHorst Hummel 152540545573SHorst Hummel if (IS_ERR(cqr)) { 1526fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 152740545573SHorst Hummel "Could not allocate PSF-SSC request"); 152840545573SHorst Hummel return cqr; 152940545573SHorst Hummel } 153040545573SHorst Hummel psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 153140545573SHorst Hummel psf_ssc_data->order = PSF_ORDER_SSC; 1532626350b6SStefan Weinhuber psf_ssc_data->suborder = 0xc0; 1533f3eb5384SStefan Weinhuber if (enable_pav) { 1534626350b6SStefan Weinhuber psf_ssc_data->suborder |= 0x08; 15358e09f215SStefan Weinhuber psf_ssc_data->reserved[0] = 0x88; 1536f3eb5384SStefan Weinhuber } 153740545573SHorst Hummel ccw = cqr->cpaddr; 153840545573SHorst Hummel ccw->cmd_code = DASD_ECKD_CCW_PSF; 153940545573SHorst Hummel ccw->cda = (__u32)(addr_t)psf_ssc_data; 154040545573SHorst Hummel ccw->count = 66; 154140545573SHorst Hummel 15428e09f215SStefan Weinhuber cqr->startdev = device; 15438e09f215SStefan Weinhuber cqr->memdev = device; 15448e09f215SStefan Weinhuber cqr->block = NULL; 1545eb6e199bSStefan Weinhuber cqr->retries = 256; 154640545573SHorst Hummel cqr->expires = 10*HZ; 15471aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 154840545573SHorst Hummel cqr->status = DASD_CQR_FILLED; 154940545573SHorst Hummel return cqr; 155040545573SHorst Hummel } 155140545573SHorst Hummel 155240545573SHorst Hummel /* 155340545573SHorst Hummel * Perform Subsystem Function. 155440545573SHorst Hummel * It is necessary to trigger CIO for channel revalidation since this 155540545573SHorst Hummel * call might change behaviour of DASD devices. 155640545573SHorst Hummel */ 155740545573SHorst Hummel static int 155812d7b107SStefan Haberland dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav, 155912d7b107SStefan Haberland unsigned long flags) 156040545573SHorst Hummel { 156140545573SHorst Hummel struct dasd_ccw_req *cqr; 156240545573SHorst Hummel int rc; 156340545573SHorst Hummel 1564f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_psf_ssc(device, enable_pav); 156540545573SHorst Hummel if (IS_ERR(cqr)) 156640545573SHorst Hummel return PTR_ERR(cqr); 156740545573SHorst Hummel 156812d7b107SStefan Haberland /* 156912d7b107SStefan Haberland * set flags e.g. turn on failfast, to prevent blocking 157012d7b107SStefan Haberland * the calling function should handle failed requests 157112d7b107SStefan Haberland */ 157212d7b107SStefan Haberland cqr->flags |= flags; 157312d7b107SStefan Haberland 157440545573SHorst Hummel rc = dasd_sleep_on(cqr); 157540545573SHorst Hummel if (!rc) 157640545573SHorst Hummel /* trigger CIO to reprobe devices */ 157740545573SHorst Hummel css_schedule_reprobe(); 157812d7b107SStefan Haberland else if (cqr->intrc == -EAGAIN) 157912d7b107SStefan Haberland rc = -EAGAIN; 158012d7b107SStefan Haberland 15818e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 158240545573SHorst Hummel return rc; 158340545573SHorst Hummel } 158440545573SHorst Hummel 158540545573SHorst Hummel /* 158640545573SHorst Hummel * Valide storage server of current device. 158740545573SHorst Hummel */ 158812d7b107SStefan Haberland static int dasd_eckd_validate_server(struct dasd_device *device, 158912d7b107SStefan Haberland unsigned long flags) 159040545573SHorst Hummel { 1591543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1592543691a4SSebastian Ott int enable_pav, rc; 159340545573SHorst Hummel 1594f9f8d02fSStefan Haberland if (private->uid.type == UA_BASE_PAV_ALIAS || 1595f9f8d02fSStefan Haberland private->uid.type == UA_HYPER_PAV_ALIAS) 159612d7b107SStefan Haberland return 0; 159740545573SHorst Hummel if (dasd_nopav || MACHINE_IS_VM) 1598f3eb5384SStefan Weinhuber enable_pav = 0; 1599f3eb5384SStefan Weinhuber else 1600f3eb5384SStefan Weinhuber enable_pav = 1; 160112d7b107SStefan Haberland rc = dasd_eckd_psf_ssc(device, enable_pav, flags); 1602eb6e199bSStefan Weinhuber 160340545573SHorst Hummel /* may be requested feature is not available on server, 160440545573SHorst Hummel * therefore just report error and go ahead */ 1605b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " 1606b8ed5dd5SStefan Haberland "returned rc=%d", private->uid.ssid, rc); 160712d7b107SStefan Haberland return rc; 160840545573SHorst Hummel } 160940545573SHorst Hummel 1610f1633031SStefan Haberland /* 1611f1633031SStefan Haberland * worker to do a validate server in case of a lost pathgroup 1612f1633031SStefan Haberland */ 1613f1633031SStefan Haberland static void dasd_eckd_do_validate_server(struct work_struct *work) 1614f1633031SStefan Haberland { 1615f1633031SStefan Haberland struct dasd_device *device = container_of(work, struct dasd_device, 1616f1633031SStefan Haberland kick_validate); 1617ea4da6eaSStefan Haberland unsigned long flags = 0; 1618ea4da6eaSStefan Haberland 1619ea4da6eaSStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &flags); 1620ea4da6eaSStefan Haberland if (dasd_eckd_validate_server(device, flags) 162112d7b107SStefan Haberland == -EAGAIN) { 162212d7b107SStefan Haberland /* schedule worker again if failed */ 162312d7b107SStefan Haberland schedule_work(&device->kick_validate); 162412d7b107SStefan Haberland return; 162512d7b107SStefan Haberland } 162612d7b107SStefan Haberland 1627f1633031SStefan Haberland dasd_put_device(device); 1628f1633031SStefan Haberland } 1629f1633031SStefan Haberland 1630f1633031SStefan Haberland static void dasd_eckd_kick_validate_server(struct dasd_device *device) 1631f1633031SStefan Haberland { 1632f1633031SStefan Haberland dasd_get_device(device); 163325e2cf1cSStefan Haberland /* exit if device not online or in offline processing */ 163425e2cf1cSStefan Haberland if (test_bit(DASD_FLAG_OFFLINE, &device->flags) || 163525e2cf1cSStefan Haberland device->state < DASD_STATE_ONLINE) { 163625e2cf1cSStefan Haberland dasd_put_device(device); 163725e2cf1cSStefan Haberland return; 163825e2cf1cSStefan Haberland } 1639f1633031SStefan Haberland /* queue call to do_validate_server to the kernel event daemon. */ 1640f2608cd4SStefan Haberland if (!schedule_work(&device->kick_validate)) 1641f2608cd4SStefan Haberland dasd_put_device(device); 1642f1633031SStefan Haberland } 1643f1633031SStefan Haberland 1644ef19298bSStefan Weinhuber static u32 get_fcx_max_data(struct dasd_device *device) 1645ef19298bSStefan Weinhuber { 1646543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1647ef19298bSStefan Weinhuber int fcx_in_css, fcx_in_gneq, fcx_in_features; 1648543691a4SSebastian Ott int tpm, mdc; 1649ef19298bSStefan Weinhuber 1650ef19298bSStefan Weinhuber if (dasd_nofcx) 1651ef19298bSStefan Weinhuber return 0; 1652ef19298bSStefan Weinhuber /* is transport mode supported? */ 1653ef19298bSStefan Weinhuber fcx_in_css = css_general_characteristics.fcx; 1654ef19298bSStefan Weinhuber fcx_in_gneq = private->gneq->reserved2[7] & 0x04; 1655ef19298bSStefan Weinhuber fcx_in_features = private->features.feature[40] & 0x80; 1656ef19298bSStefan Weinhuber tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; 1657ef19298bSStefan Weinhuber 1658ef19298bSStefan Weinhuber if (!tpm) 1659ef19298bSStefan Weinhuber return 0; 1660ef19298bSStefan Weinhuber 1661ef19298bSStefan Weinhuber mdc = ccw_device_get_mdc(device->cdev, 0); 1662ef19298bSStefan Weinhuber if (mdc < 0) { 1663ef19298bSStefan Weinhuber dev_warn(&device->cdev->dev, "Detecting the maximum supported" 1664ef19298bSStefan Weinhuber " data size for zHPF requests failed\n"); 1665ef19298bSStefan Weinhuber return 0; 1666ef19298bSStefan Weinhuber } else 1667ef19298bSStefan Weinhuber return mdc * FCX_MAX_DATA_FACTOR; 1668ef19298bSStefan Weinhuber } 1669ef19298bSStefan Weinhuber 167040545573SHorst Hummel /* 16713d052595SHorst Hummel * Check device characteristics. 16723d052595SHorst Hummel * If the device is accessible using ECKD discipline, the device is enabled. 16733d052595SHorst Hummel */ 16741da177e4SLinus Torvalds static int 16751da177e4SLinus Torvalds dasd_eckd_check_characteristics(struct dasd_device *device) 16761da177e4SLinus Torvalds { 1677543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 16788e09f215SStefan Weinhuber struct dasd_block *block; 16792dedf0d9SStefan Haberland struct dasd_uid temp_uid; 1680f9f8d02fSStefan Haberland int rc, i; 168133b62a30SStefan Weinhuber int readonly; 16827c8faa86SStefan Haberland unsigned long value; 16831da177e4SLinus Torvalds 1684f1633031SStefan Haberland /* setup work queue for validate server*/ 1685f1633031SStefan Haberland INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server); 168659a9ed5fSStefan Haberland /* setup work queue for summary unit check */ 168759a9ed5fSStefan Haberland INIT_WORK(&device->suc_work, dasd_alias_handle_summary_unit_check); 1688f1633031SStefan Haberland 1689454e1fa1SPeter Oberparleiter if (!ccw_device_is_pathgroup(device->cdev)) { 1690454e1fa1SPeter Oberparleiter dev_warn(&device->cdev->dev, 1691454e1fa1SPeter Oberparleiter "A channel path group could not be established\n"); 1692454e1fa1SPeter Oberparleiter return -EIO; 1693454e1fa1SPeter Oberparleiter } 1694454e1fa1SPeter Oberparleiter if (!ccw_device_is_multipath(device->cdev)) { 1695454e1fa1SPeter Oberparleiter dev_info(&device->cdev->dev, 1696454e1fa1SPeter Oberparleiter "The DASD is not operating in multipath mode\n"); 1697454e1fa1SPeter Oberparleiter } 169892636b15SSebastian Ott if (!private) { 169992636b15SSebastian Ott private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); 170092636b15SSebastian Ott if (!private) { 1701fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1702fc19f381SStefan Haberland "Allocating memory for private DASD data " 1703fc19f381SStefan Haberland "failed\n"); 17041da177e4SLinus Torvalds return -ENOMEM; 17051da177e4SLinus Torvalds } 1706543691a4SSebastian Ott device->private = private; 170792636b15SSebastian Ott } else { 170892636b15SSebastian Ott memset(private, 0, sizeof(*private)); 17091da177e4SLinus Torvalds } 17101da177e4SLinus Torvalds /* Invalidate status of initial analysis. */ 17111da177e4SLinus Torvalds private->init_cqr_status = -1; 17121da177e4SLinus Torvalds /* Set default cache operations. */ 17131da177e4SLinus Torvalds private->attrib.operation = DASD_NORMAL_CACHE; 17141da177e4SLinus Torvalds private->attrib.nr_cyl = 0; 17151da177e4SLinus Torvalds 171640545573SHorst Hummel /* Read Configuration Data */ 171740545573SHorst Hummel rc = dasd_eckd_read_conf(device); 171840545573SHorst Hummel if (rc) 17198e09f215SStefan Weinhuber goto out_err1; 172040545573SHorst Hummel 17217c8faa86SStefan Haberland /* set default timeout */ 17227c8faa86SStefan Haberland device->default_expires = DASD_EXPIRES; 17231f1ee9adSHannes Reinecke /* set default retry count */ 17241f1ee9adSHannes Reinecke device->default_retries = DASD_RETRIES; 17251f1ee9adSHannes Reinecke 17267c8faa86SStefan Haberland if (private->gneq) { 17277c8faa86SStefan Haberland value = 1; 17287c8faa86SStefan Haberland for (i = 0; i < private->gneq->timeout.value; i++) 17297c8faa86SStefan Haberland value = 10 * value; 17307c8faa86SStefan Haberland value = value * private->gneq->timeout.number; 17317c8faa86SStefan Haberland /* do not accept useless values */ 17327c8faa86SStefan Haberland if (value != 0 && value <= DASD_EXPIRES_MAX) 17337c8faa86SStefan Haberland device->default_expires = value; 17347c8faa86SStefan Haberland } 17357c8faa86SStefan Haberland 17362dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 17372dedf0d9SStefan Haberland if (temp_uid.type == UA_BASE_DEVICE) { 17388e09f215SStefan Weinhuber block = dasd_alloc_block(); 17398e09f215SStefan Weinhuber if (IS_ERR(block)) { 1740b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1741b8ed5dd5SStefan Haberland "could not allocate dasd " 1742b8ed5dd5SStefan Haberland "block structure"); 17438e09f215SStefan Weinhuber rc = PTR_ERR(block); 17448e09f215SStefan Weinhuber goto out_err1; 17458e09f215SStefan Weinhuber } 17468e09f215SStefan Weinhuber device->block = block; 17478e09f215SStefan Weinhuber block->base = device; 17488e09f215SStefan Weinhuber } 17498e09f215SStefan Weinhuber 1750f9f8d02fSStefan Haberland /* register lcu with alias handling, enable PAV */ 1751f9f8d02fSStefan Haberland rc = dasd_alias_make_device_known_to_lcu(device); 1752f9f8d02fSStefan Haberland if (rc) 17538e09f215SStefan Weinhuber goto out_err2; 1754f9f8d02fSStefan Haberland 175512d7b107SStefan Haberland dasd_eckd_validate_server(device, 0); 1756f4ac1d02SStefan Weinhuber 1757f4ac1d02SStefan Weinhuber /* device may report different configuration data after LCU setup */ 1758f4ac1d02SStefan Weinhuber rc = dasd_eckd_read_conf(device); 175940545573SHorst Hummel if (rc) 17608e09f215SStefan Weinhuber goto out_err3; 17618e09f215SStefan Weinhuber 17628e09f215SStefan Weinhuber /* Read Feature Codes */ 176368d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 176440545573SHorst Hummel 17651da177e4SLinus Torvalds /* Read Device Characteristics */ 176668b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 176768b781feSStefan Haberland &private->rdc_data, 64); 17688e09f215SStefan Weinhuber if (rc) { 1769b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1770b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 17718e09f215SStefan Weinhuber goto out_err3; 17728e09f215SStefan Weinhuber } 177334cd551aSStefan Haberland 177434cd551aSStefan Haberland if ((device->features & DASD_FEATURE_USERAW) && 177534cd551aSStefan Haberland !(private->rdc_data.facilities.RT_in_LR)) { 177634cd551aSStefan Haberland dev_err(&device->cdev->dev, "The storage server does not " 177734cd551aSStefan Haberland "support raw-track access\n"); 177834cd551aSStefan Haberland rc = -EINVAL; 177934cd551aSStefan Haberland goto out_err3; 178034cd551aSStefan Haberland } 178134cd551aSStefan Haberland 1782817f2c84SNikanth Karthikesan /* find the valid cylinder size */ 1783b44b0ab3SStefan Weinhuber if (private->rdc_data.no_cyl == LV_COMPAT_CYL && 1784b44b0ab3SStefan Weinhuber private->rdc_data.long_no_cyl) 1785b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.long_no_cyl; 1786b44b0ab3SStefan Weinhuber else 1787b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.no_cyl; 1788b44b0ab3SStefan Weinhuber 1789ef19298bSStefan Weinhuber private->fcx_max_data = get_fcx_max_data(device); 1790ef19298bSStefan Weinhuber 179133b62a30SStefan Weinhuber readonly = dasd_device_is_ro(device); 179233b62a30SStefan Weinhuber if (readonly) 179333b62a30SStefan Weinhuber set_bit(DASD_FLAG_DEVICE_RO, &device->flags); 179433b62a30SStefan Weinhuber 1795fc19f381SStefan Haberland dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " 179633b62a30SStefan Weinhuber "with %d cylinders, %d heads, %d sectors%s\n", 17971da177e4SLinus Torvalds private->rdc_data.dev_type, 17981da177e4SLinus Torvalds private->rdc_data.dev_model, 17991da177e4SLinus Torvalds private->rdc_data.cu_type, 18001da177e4SLinus Torvalds private->rdc_data.cu_model.model, 1801b44b0ab3SStefan Weinhuber private->real_cyl, 18021da177e4SLinus Torvalds private->rdc_data.trk_per_cyl, 180333b62a30SStefan Weinhuber private->rdc_data.sec_per_trk, 180433b62a30SStefan Weinhuber readonly ? ", read-only device" : ""); 18058e09f215SStefan Weinhuber return 0; 18068e09f215SStefan Weinhuber 18078e09f215SStefan Weinhuber out_err3: 18088e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 18098e09f215SStefan Weinhuber out_err2: 18108e09f215SStefan Weinhuber dasd_free_block(device->block); 18118e09f215SStefan Weinhuber device->block = NULL; 18128e09f215SStefan Weinhuber out_err1: 18134abb08c2SStefan Weinhuber kfree(private->conf_data); 18148e09f215SStefan Weinhuber kfree(device->private); 18158e09f215SStefan Weinhuber device->private = NULL; 18163d052595SHorst Hummel return rc; 18171da177e4SLinus Torvalds } 18181da177e4SLinus Torvalds 18198e09f215SStefan Weinhuber static void dasd_eckd_uncheck_device(struct dasd_device *device) 18208e09f215SStefan Weinhuber { 1821543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1822b179b037SStefan Haberland int i; 18234abb08c2SStefan Weinhuber 18248e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 18254abb08c2SStefan Weinhuber private->ned = NULL; 18264abb08c2SStefan Weinhuber private->sneq = NULL; 18274abb08c2SStefan Weinhuber private->vdsneq = NULL; 18284abb08c2SStefan Weinhuber private->gneq = NULL; 18294abb08c2SStefan Weinhuber private->conf_len = 0; 1830b179b037SStefan Haberland for (i = 0; i < 8; i++) { 1831b179b037SStefan Haberland kfree(private->path_conf_data[i]); 1832b179b037SStefan Haberland if ((__u8 *)private->path_conf_data[i] == 1833b179b037SStefan Haberland private->conf_data) { 1834b179b037SStefan Haberland private->conf_data = NULL; 1835b179b037SStefan Haberland private->conf_len = 0; 1836b179b037SStefan Haberland } 1837b179b037SStefan Haberland private->path_conf_data[i] = NULL; 1838b179b037SStefan Haberland } 18394abb08c2SStefan Weinhuber kfree(private->conf_data); 18404abb08c2SStefan Weinhuber private->conf_data = NULL; 18418e09f215SStefan Weinhuber } 18428e09f215SStefan Weinhuber 18431da177e4SLinus Torvalds static struct dasd_ccw_req * 18441da177e4SLinus Torvalds dasd_eckd_analysis_ccw(struct dasd_device *device) 18451da177e4SLinus Torvalds { 1846543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 18471da177e4SLinus Torvalds struct eckd_count *count_data; 18481da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 18491da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 18501da177e4SLinus Torvalds struct ccw1 *ccw; 18511da177e4SLinus Torvalds int cplength, datasize; 18521da177e4SLinus Torvalds int i; 18531da177e4SLinus Torvalds 18541da177e4SLinus Torvalds cplength = 8; 18551da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 185668b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 18571da177e4SLinus Torvalds if (IS_ERR(cqr)) 18581da177e4SLinus Torvalds return cqr; 18591da177e4SLinus Torvalds ccw = cqr->cpaddr; 18601da177e4SLinus Torvalds /* Define extent for the first 3 tracks. */ 18611da177e4SLinus Torvalds define_extent(ccw++, cqr->data, 0, 2, 18621da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device); 18631da177e4SLinus Torvalds LO_data = cqr->data + sizeof(struct DE_eckd_data); 18641da177e4SLinus Torvalds /* Locate record for the first 4 records on track 0. */ 18651da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18661da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 0, 0, 4, 18671da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 18681da177e4SLinus Torvalds 18691da177e4SLinus Torvalds count_data = private->count_area; 18701da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 18711da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18721da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 18731da177e4SLinus Torvalds ccw->flags = 0; 18741da177e4SLinus Torvalds ccw->count = 8; 18751da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 18761da177e4SLinus Torvalds ccw++; 18771da177e4SLinus Torvalds count_data++; 18781da177e4SLinus Torvalds } 18791da177e4SLinus Torvalds 18801da177e4SLinus Torvalds /* Locate record for the first record on track 2. */ 18811da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18821da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 2, 0, 1, 18831da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 18841da177e4SLinus Torvalds /* Read count ccw. */ 18851da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18861da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 18871da177e4SLinus Torvalds ccw->flags = 0; 18881da177e4SLinus Torvalds ccw->count = 8; 18891da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 18901da177e4SLinus Torvalds 18918e09f215SStefan Weinhuber cqr->block = NULL; 18928e09f215SStefan Weinhuber cqr->startdev = device; 18938e09f215SStefan Weinhuber cqr->memdev = device; 1894eb6e199bSStefan Weinhuber cqr->retries = 255; 18951aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 18961da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 18971da177e4SLinus Torvalds return cqr; 18981da177e4SLinus Torvalds } 18991da177e4SLinus Torvalds 1900eb6e199bSStefan Weinhuber /* differentiate between 'no record found' and any other error */ 1901eb6e199bSStefan Weinhuber static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) 1902eb6e199bSStefan Weinhuber { 1903eb6e199bSStefan Weinhuber char *sense; 1904eb6e199bSStefan Weinhuber if (init_cqr->status == DASD_CQR_DONE) 1905eb6e199bSStefan Weinhuber return INIT_CQR_OK; 1906eb6e199bSStefan Weinhuber else if (init_cqr->status == DASD_CQR_NEED_ERP || 1907eb6e199bSStefan Weinhuber init_cqr->status == DASD_CQR_FAILED) { 1908eb6e199bSStefan Weinhuber sense = dasd_get_sense(&init_cqr->irb); 1909eb6e199bSStefan Weinhuber if (sense && (sense[1] & SNS1_NO_REC_FOUND)) 1910eb6e199bSStefan Weinhuber return INIT_CQR_UNFORMATTED; 1911eb6e199bSStefan Weinhuber else 1912eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 1913eb6e199bSStefan Weinhuber } else 1914eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 1915eb6e199bSStefan Weinhuber } 1916eb6e199bSStefan Weinhuber 19171da177e4SLinus Torvalds /* 19181da177e4SLinus Torvalds * This is the callback function for the init_analysis cqr. It saves 19191da177e4SLinus Torvalds * the status of the initial analysis ccw before it frees it and kicks 19201da177e4SLinus Torvalds * the device to continue the startup sequence. This will call 19211da177e4SLinus Torvalds * dasd_eckd_do_analysis again (if the devices has not been marked 19221da177e4SLinus Torvalds * for deletion in the meantime). 19231da177e4SLinus Torvalds */ 1924eb6e199bSStefan Weinhuber static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, 1925eb6e199bSStefan Weinhuber void *data) 19261da177e4SLinus Torvalds { 1927543691a4SSebastian Ott struct dasd_device *device = init_cqr->startdev; 1928543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 19291da177e4SLinus Torvalds 1930eb6e199bSStefan Weinhuber private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); 19311da177e4SLinus Torvalds dasd_sfree_request(init_cqr, device); 19321da177e4SLinus Torvalds dasd_kick_device(device); 19331da177e4SLinus Torvalds } 19341da177e4SLinus Torvalds 1935eb6e199bSStefan Weinhuber static int dasd_eckd_start_analysis(struct dasd_block *block) 19361da177e4SLinus Torvalds { 19371da177e4SLinus Torvalds struct dasd_ccw_req *init_cqr; 19381da177e4SLinus Torvalds 19398e09f215SStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(block->base); 19401da177e4SLinus Torvalds if (IS_ERR(init_cqr)) 19411da177e4SLinus Torvalds return PTR_ERR(init_cqr); 19421da177e4SLinus Torvalds init_cqr->callback = dasd_eckd_analysis_callback; 19431da177e4SLinus Torvalds init_cqr->callback_data = NULL; 19441da177e4SLinus Torvalds init_cqr->expires = 5*HZ; 1945eb6e199bSStefan Weinhuber /* first try without ERP, so we can later handle unformatted 1946eb6e199bSStefan Weinhuber * devices as special case 1947eb6e199bSStefan Weinhuber */ 1948eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); 1949eb6e199bSStefan Weinhuber init_cqr->retries = 0; 19501da177e4SLinus Torvalds dasd_add_request_head(init_cqr); 19511da177e4SLinus Torvalds return -EAGAIN; 19521da177e4SLinus Torvalds } 19531da177e4SLinus Torvalds 1954eb6e199bSStefan Weinhuber static int dasd_eckd_end_analysis(struct dasd_block *block) 19551da177e4SLinus Torvalds { 1956543691a4SSebastian Ott struct dasd_device *device = block->base; 1957543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 19581da177e4SLinus Torvalds struct eckd_count *count_area; 19591da177e4SLinus Torvalds unsigned int sb, blk_per_trk; 19601da177e4SLinus Torvalds int status, i; 1961eb6e199bSStefan Weinhuber struct dasd_ccw_req *init_cqr; 19621da177e4SLinus Torvalds 19631da177e4SLinus Torvalds status = private->init_cqr_status; 19641da177e4SLinus Torvalds private->init_cqr_status = -1; 1965eb6e199bSStefan Weinhuber if (status == INIT_CQR_ERROR) { 1966eb6e199bSStefan Weinhuber /* try again, this time with full ERP */ 1967eb6e199bSStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(device); 1968eb6e199bSStefan Weinhuber dasd_sleep_on(init_cqr); 1969eb6e199bSStefan Weinhuber status = dasd_eckd_analysis_evaluation(init_cqr); 1970eb6e199bSStefan Weinhuber dasd_sfree_request(init_cqr, device); 1971eb6e199bSStefan Weinhuber } 1972eb6e199bSStefan Weinhuber 1973e4dbb0f2SStefan Haberland if (device->features & DASD_FEATURE_USERAW) { 1974e4dbb0f2SStefan Haberland block->bp_block = DASD_RAW_BLOCKSIZE; 1975e4dbb0f2SStefan Haberland blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; 1976e4dbb0f2SStefan Haberland block->s2b_shift = 3; 1977e4dbb0f2SStefan Haberland goto raw; 1978e4dbb0f2SStefan Haberland } 1979e4dbb0f2SStefan Haberland 1980eb6e199bSStefan Weinhuber if (status == INIT_CQR_UNFORMATTED) { 1981eb6e199bSStefan Weinhuber dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); 19821da177e4SLinus Torvalds return -EMEDIUMTYPE; 1983eb6e199bSStefan Weinhuber } else if (status == INIT_CQR_ERROR) { 1984eb6e199bSStefan Weinhuber dev_err(&device->cdev->dev, 1985eb6e199bSStefan Weinhuber "Detecting the DASD disk layout failed because " 1986eb6e199bSStefan Weinhuber "of an I/O error\n"); 1987eb6e199bSStefan Weinhuber return -EIO; 19881da177e4SLinus Torvalds } 19891da177e4SLinus Torvalds 19901da177e4SLinus Torvalds private->uses_cdl = 1; 19911da177e4SLinus Torvalds /* Check Track 0 for Compatible Disk Layout */ 19921da177e4SLinus Torvalds count_area = NULL; 19931da177e4SLinus Torvalds for (i = 0; i < 3; i++) { 19941da177e4SLinus Torvalds if (private->count_area[i].kl != 4 || 19953bc9fef9SStefan Haberland private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 || 19963bc9fef9SStefan Haberland private->count_area[i].cyl != 0 || 19973bc9fef9SStefan Haberland private->count_area[i].head != count_area_head[i] || 19983bc9fef9SStefan Haberland private->count_area[i].record != count_area_rec[i]) { 19991da177e4SLinus Torvalds private->uses_cdl = 0; 20001da177e4SLinus Torvalds break; 20011da177e4SLinus Torvalds } 20021da177e4SLinus Torvalds } 20031da177e4SLinus Torvalds if (i == 3) 20041da177e4SLinus Torvalds count_area = &private->count_area[4]; 20051da177e4SLinus Torvalds 20061da177e4SLinus Torvalds if (private->uses_cdl == 0) { 20071da177e4SLinus Torvalds for (i = 0; i < 5; i++) { 20081da177e4SLinus Torvalds if ((private->count_area[i].kl != 0) || 20091da177e4SLinus Torvalds (private->count_area[i].dl != 20103bc9fef9SStefan Haberland private->count_area[0].dl) || 20113bc9fef9SStefan Haberland private->count_area[i].cyl != 0 || 20123bc9fef9SStefan Haberland private->count_area[i].head != count_area_head[i] || 20133bc9fef9SStefan Haberland private->count_area[i].record != count_area_rec[i]) 20141da177e4SLinus Torvalds break; 20151da177e4SLinus Torvalds } 20161da177e4SLinus Torvalds if (i == 5) 20171da177e4SLinus Torvalds count_area = &private->count_area[0]; 20181da177e4SLinus Torvalds } else { 20191da177e4SLinus Torvalds if (private->count_area[3].record == 1) 2020fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 2021fc19f381SStefan Haberland "Track 0 has no records following the VTOC\n"); 20221da177e4SLinus Torvalds } 2023e4dbb0f2SStefan Haberland 20241da177e4SLinus Torvalds if (count_area != NULL && count_area->kl == 0) { 20251da177e4SLinus Torvalds /* we found notthing violating our disk layout */ 20261da177e4SLinus Torvalds if (dasd_check_blocksize(count_area->dl) == 0) 20278e09f215SStefan Weinhuber block->bp_block = count_area->dl; 20281da177e4SLinus Torvalds } 20298e09f215SStefan Weinhuber if (block->bp_block == 0) { 2030fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 2031fc19f381SStefan Haberland "The disk layout of the DASD is not supported\n"); 20321da177e4SLinus Torvalds return -EMEDIUMTYPE; 20331da177e4SLinus Torvalds } 20348e09f215SStefan Weinhuber block->s2b_shift = 0; /* bits to shift 512 to get a block */ 20358e09f215SStefan Weinhuber for (sb = 512; sb < block->bp_block; sb = sb << 1) 20368e09f215SStefan Weinhuber block->s2b_shift++; 20371da177e4SLinus Torvalds 20388e09f215SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 2039e4dbb0f2SStefan Haberland 2040e4dbb0f2SStefan Haberland raw: 2041b44b0ab3SStefan Weinhuber block->blocks = (private->real_cyl * 20421da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 20431da177e4SLinus Torvalds blk_per_trk); 20441da177e4SLinus Torvalds 2045fc19f381SStefan Haberland dev_info(&device->cdev->dev, 2046fc19f381SStefan Haberland "DASD with %d KB/block, %d KB total size, %d KB/track, " 2047fc19f381SStefan Haberland "%s\n", (block->bp_block >> 10), 2048b44b0ab3SStefan Weinhuber ((private->real_cyl * 20491da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 20508e09f215SStefan Weinhuber blk_per_trk * (block->bp_block >> 9)) >> 1), 20518e09f215SStefan Weinhuber ((blk_per_trk * block->bp_block) >> 10), 20521da177e4SLinus Torvalds private->uses_cdl ? 20531da177e4SLinus Torvalds "compatible disk layout" : "linux disk layout"); 20541da177e4SLinus Torvalds 20551da177e4SLinus Torvalds return 0; 20561da177e4SLinus Torvalds } 20571da177e4SLinus Torvalds 20588e09f215SStefan Weinhuber static int dasd_eckd_do_analysis(struct dasd_block *block) 20591da177e4SLinus Torvalds { 2060543691a4SSebastian Ott struct dasd_eckd_private *private = block->base->private; 20611da177e4SLinus Torvalds 20621da177e4SLinus Torvalds if (private->init_cqr_status < 0) 20638e09f215SStefan Weinhuber return dasd_eckd_start_analysis(block); 20641da177e4SLinus Torvalds else 20658e09f215SStefan Weinhuber return dasd_eckd_end_analysis(block); 20661da177e4SLinus Torvalds } 20671da177e4SLinus Torvalds 2068d42e1712SStefan Haberland static int dasd_eckd_basic_to_ready(struct dasd_device *device) 20698e09f215SStefan Weinhuber { 20708e09f215SStefan Weinhuber return dasd_alias_add_device(device); 20718e09f215SStefan Weinhuber }; 20728e09f215SStefan Weinhuber 20738e09f215SStefan Weinhuber static int dasd_eckd_online_to_ready(struct dasd_device *device) 20748e09f215SStefan Weinhuber { 2075501183f2SStefan Haberland cancel_work_sync(&device->reload_device); 207625e2cf1cSStefan Haberland cancel_work_sync(&device->kick_validate); 2077d42e1712SStefan Haberland return 0; 2078d42e1712SStefan Haberland }; 2079d42e1712SStefan Haberland 2080daa991bfSStefan Haberland static int dasd_eckd_basic_to_known(struct dasd_device *device) 2081d42e1712SStefan Haberland { 20828e09f215SStefan Weinhuber return dasd_alias_remove_device(device); 20838e09f215SStefan Weinhuber }; 20848e09f215SStefan Weinhuber 20851da177e4SLinus Torvalds static int 20868e09f215SStefan Weinhuber dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 20871da177e4SLinus Torvalds { 2088543691a4SSebastian Ott struct dasd_eckd_private *private = block->base->private; 20891da177e4SLinus Torvalds 20908e09f215SStefan Weinhuber if (dasd_check_blocksize(block->bp_block) == 0) { 20911da177e4SLinus Torvalds geo->sectors = recs_per_track(&private->rdc_data, 20928e09f215SStefan Weinhuber 0, block->bp_block); 20931da177e4SLinus Torvalds } 20941da177e4SLinus Torvalds geo->cylinders = private->rdc_data.no_cyl; 20951da177e4SLinus Torvalds geo->heads = private->rdc_data.trk_per_cyl; 20961da177e4SLinus Torvalds return 0; 20971da177e4SLinus Torvalds } 20981da177e4SLinus Torvalds 20991da177e4SLinus Torvalds static struct dasd_ccw_req * 2100d42e1712SStefan Haberland dasd_eckd_build_format(struct dasd_device *base, 210129b8dd9dSStefan Haberland struct format_data_t *fdata, 2102a94fa154SStefan Haberland int enable_pav) 21031da177e4SLinus Torvalds { 2104d42e1712SStefan Haberland struct dasd_eckd_private *base_priv; 2105d42e1712SStefan Haberland struct dasd_eckd_private *start_priv; 210629b8dd9dSStefan Haberland struct dasd_device *startdev = NULL; 21071da177e4SLinus Torvalds struct dasd_ccw_req *fcp; 21081da177e4SLinus Torvalds struct eckd_count *ect; 2109d42e1712SStefan Haberland struct ch_t address; 21101da177e4SLinus Torvalds struct ccw1 *ccw; 21111da177e4SLinus Torvalds void *data; 2112b44b0ab3SStefan Weinhuber int rpt; 21131da177e4SLinus Torvalds int cplength, datasize; 2114d42e1712SStefan Haberland int i, j; 2115f9a28f7bSJean-Baptiste Joret int intensity = 0; 2116f9a28f7bSJean-Baptiste Joret int r0_perm; 2117d42e1712SStefan Haberland int nr_tracks; 211818d6624eSStefan Haberland int use_prefix; 21191da177e4SLinus Torvalds 2120a94fa154SStefan Haberland if (enable_pav) 2121d42e1712SStefan Haberland startdev = dasd_alias_get_start_dev(base); 212229b8dd9dSStefan Haberland 2123d42e1712SStefan Haberland if (!startdev) 2124d42e1712SStefan Haberland startdev = base; 21251da177e4SLinus Torvalds 2126543691a4SSebastian Ott start_priv = startdev->private; 2127543691a4SSebastian Ott base_priv = base->private; 2128d42e1712SStefan Haberland 2129d42e1712SStefan Haberland rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize); 2130d42e1712SStefan Haberland 2131d42e1712SStefan Haberland nr_tracks = fdata->stop_unit - fdata->start_unit + 1; 21321da177e4SLinus Torvalds 21331da177e4SLinus Torvalds /* 21341da177e4SLinus Torvalds * fdata->intensity is a bit string that tells us what to do: 21351da177e4SLinus Torvalds * Bit 0: write record zero 21361da177e4SLinus Torvalds * Bit 1: write home address, currently not supported 21371da177e4SLinus Torvalds * Bit 2: invalidate tracks 21381da177e4SLinus Torvalds * Bit 3: use OS/390 compatible disk layout (cdl) 2139f9a28f7bSJean-Baptiste Joret * Bit 4: do not allow storage subsystem to modify record zero 21401da177e4SLinus Torvalds * Only some bit combinations do make sense. 21411da177e4SLinus Torvalds */ 2142f9a28f7bSJean-Baptiste Joret if (fdata->intensity & 0x10) { 2143f9a28f7bSJean-Baptiste Joret r0_perm = 0; 2144f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity & ~0x10; 2145f9a28f7bSJean-Baptiste Joret } else { 2146f9a28f7bSJean-Baptiste Joret r0_perm = 1; 2147f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity; 2148f9a28f7bSJean-Baptiste Joret } 2149d42e1712SStefan Haberland 215018d6624eSStefan Haberland use_prefix = base_priv->features.feature[8] & 0x01; 215118d6624eSStefan Haberland 2152f9a28f7bSJean-Baptiste Joret switch (intensity) { 21531da177e4SLinus Torvalds case 0x00: /* Normal format */ 21541da177e4SLinus Torvalds case 0x08: /* Normal format, use cdl. */ 2155d42e1712SStefan Haberland cplength = 2 + (rpt*nr_tracks); 215618d6624eSStefan Haberland if (use_prefix) 2157d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 21581da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 2159d42e1712SStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 216018d6624eSStefan Haberland else 216118d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 216218d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 216318d6624eSStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 21641da177e4SLinus Torvalds break; 21651da177e4SLinus Torvalds case 0x01: /* Write record zero and format track. */ 21661da177e4SLinus Torvalds case 0x09: /* Write record zero and format track, use cdl. */ 2167d42e1712SStefan Haberland cplength = 2 + rpt * nr_tracks; 216818d6624eSStefan Haberland if (use_prefix) 2169d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 21701da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 21711da177e4SLinus Torvalds sizeof(struct eckd_count) + 2172d42e1712SStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 217318d6624eSStefan Haberland else 217418d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 217518d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 217618d6624eSStefan Haberland sizeof(struct eckd_count) + 217718d6624eSStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 21781da177e4SLinus Torvalds break; 21791da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 21801da177e4SLinus Torvalds case 0x0c: /* Invalidate track, use cdl. */ 21811da177e4SLinus Torvalds cplength = 3; 218218d6624eSStefan Haberland if (use_prefix) 2183d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 21841da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 21851da177e4SLinus Torvalds sizeof(struct eckd_count); 218618d6624eSStefan Haberland else 218718d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 218818d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 218918d6624eSStefan Haberland sizeof(struct eckd_count); 21901da177e4SLinus Torvalds break; 21911da177e4SLinus Torvalds default: 2192d42e1712SStefan Haberland dev_warn(&startdev->cdev->dev, 2193d42e1712SStefan Haberland "An I/O control call used incorrect flags 0x%x\n", 2194d42e1712SStefan Haberland fdata->intensity); 21951da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 21961da177e4SLinus Torvalds } 21971da177e4SLinus Torvalds /* Allocate the format ccw request. */ 2198d42e1712SStefan Haberland fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 2199d42e1712SStefan Haberland datasize, startdev); 22001da177e4SLinus Torvalds if (IS_ERR(fcp)) 22011da177e4SLinus Torvalds return fcp; 22021da177e4SLinus Torvalds 2203d42e1712SStefan Haberland start_priv->count++; 22041da177e4SLinus Torvalds data = fcp->data; 22051da177e4SLinus Torvalds ccw = fcp->cpaddr; 22061da177e4SLinus Torvalds 2207f9a28f7bSJean-Baptiste Joret switch (intensity & ~0x08) { 22081da177e4SLinus Torvalds case 0x00: /* Normal format. */ 220918d6624eSStefan Haberland if (use_prefix) { 2210d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2211d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 2212d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2213f9a28f7bSJean-Baptiste Joret /* grant subsystem permission to format R0 */ 2214f9a28f7bSJean-Baptiste Joret if (r0_perm) 2215d42e1712SStefan Haberland ((struct PFX_eckd_data *)data) 2216d42e1712SStefan Haberland ->define_extent.ga_extended |= 0x04; 2217d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 221818d6624eSStefan Haberland } else { 221918d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 222018d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 222118d6624eSStefan Haberland DASD_ECKD_CCW_WRITE_CKD, startdev); 222218d6624eSStefan Haberland /* grant subsystem permission to format R0 */ 222318d6624eSStefan Haberland if (r0_perm) 222418d6624eSStefan Haberland ((struct DE_eckd_data *) data) 222518d6624eSStefan Haberland ->ga_extended |= 0x04; 222618d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 222718d6624eSStefan Haberland } 22281da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 22291da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 2230d42e1712SStefan Haberland fdata->start_unit, 0, rpt*nr_tracks, 2231d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, 22321da177e4SLinus Torvalds fdata->blksize); 22331da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 22341da177e4SLinus Torvalds break; 22351da177e4SLinus Torvalds case 0x01: /* Write record zero + format track. */ 223618d6624eSStefan Haberland if (use_prefix) { 2237d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2238d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 22391da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, 2240d42e1712SStefan Haberland base, startdev); 2241d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 224218d6624eSStefan Haberland } else { 224318d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 224418d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 224518d6624eSStefan Haberland DASD_ECKD_CCW_WRITE_RECORD_ZERO, startdev); 224618d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 224718d6624eSStefan Haberland } 22481da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 22491da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 2250d42e1712SStefan Haberland fdata->start_unit, 0, rpt * nr_tracks + 1, 2251d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_RECORD_ZERO, base, 2252d42e1712SStefan Haberland base->block->bp_block); 22531da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 22541da177e4SLinus Torvalds break; 22551da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 225618d6624eSStefan Haberland if (use_prefix) { 2257d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2258d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 2259d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2260d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 226118d6624eSStefan Haberland } else { 226218d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 226318d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 226418d6624eSStefan Haberland DASD_ECKD_CCW_WRITE_CKD, startdev); 226518d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 226618d6624eSStefan Haberland } 22671da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 22681da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 22691da177e4SLinus Torvalds fdata->start_unit, 0, 1, 2270d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, 8); 22711da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 22721da177e4SLinus Torvalds break; 22731da177e4SLinus Torvalds } 2274d42e1712SStefan Haberland 2275d42e1712SStefan Haberland for (j = 0; j < nr_tracks; j++) { 2276d42e1712SStefan Haberland /* calculate cylinder and head for the current track */ 2277d42e1712SStefan Haberland set_ch_t(&address, 2278d42e1712SStefan Haberland (fdata->start_unit + j) / 2279d42e1712SStefan Haberland base_priv->rdc_data.trk_per_cyl, 2280d42e1712SStefan Haberland (fdata->start_unit + j) % 2281d42e1712SStefan Haberland base_priv->rdc_data.trk_per_cyl); 2282f9a28f7bSJean-Baptiste Joret if (intensity & 0x01) { /* write record zero */ 22831da177e4SLinus Torvalds ect = (struct eckd_count *) data; 22841da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2285b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2286b44b0ab3SStefan Weinhuber ect->head = address.head; 22871da177e4SLinus Torvalds ect->record = 0; 22881da177e4SLinus Torvalds ect->kl = 0; 22891da177e4SLinus Torvalds ect->dl = 8; 22901da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 22911da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 22921da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 22931da177e4SLinus Torvalds ccw->count = 8; 22941da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 22951da177e4SLinus Torvalds ccw++; 22961da177e4SLinus Torvalds } 2297f9a28f7bSJean-Baptiste Joret if ((intensity & ~0x08) & 0x04) { /* erase track */ 22981da177e4SLinus Torvalds ect = (struct eckd_count *) data; 22991da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2300b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2301b44b0ab3SStefan Weinhuber ect->head = address.head; 23021da177e4SLinus Torvalds ect->record = 1; 23031da177e4SLinus Torvalds ect->kl = 0; 23041da177e4SLinus Torvalds ect->dl = 0; 23051da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 23061da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 23071da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 23081da177e4SLinus Torvalds ccw->count = 8; 23091da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 23101da177e4SLinus Torvalds } else { /* write remaining records */ 23111da177e4SLinus Torvalds for (i = 0; i < rpt; i++) { 23121da177e4SLinus Torvalds ect = (struct eckd_count *) data; 23131da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2314b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2315b44b0ab3SStefan Weinhuber ect->head = address.head; 23161da177e4SLinus Torvalds ect->record = i + 1; 23171da177e4SLinus Torvalds ect->kl = 0; 23181da177e4SLinus Torvalds ect->dl = fdata->blksize; 2319d42e1712SStefan Haberland /* 2320d42e1712SStefan Haberland * Check for special tracks 0-1 2321d42e1712SStefan Haberland * when formatting CDL 2322d42e1712SStefan Haberland */ 2323f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 232446d1c03cSJan Höppner address.cyl == 0 && address.head == 0) { 23251da177e4SLinus Torvalds if (i < 3) { 23261da177e4SLinus Torvalds ect->kl = 4; 23271da177e4SLinus Torvalds ect->dl = sizes_trk0[i] - 4; 23281da177e4SLinus Torvalds } 23291da177e4SLinus Torvalds } 2330f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 233146d1c03cSJan Höppner address.cyl == 0 && address.head == 1) { 23321da177e4SLinus Torvalds ect->kl = 44; 23331da177e4SLinus Torvalds ect->dl = LABEL_SIZE - 44; 23341da177e4SLinus Torvalds } 23351da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 2336d42e1712SStefan Haberland if (i != 0 || j == 0) 2337d42e1712SStefan Haberland ccw->cmd_code = 2338d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD; 2339d42e1712SStefan Haberland else 2340d42e1712SStefan Haberland ccw->cmd_code = 2341d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD_MT; 23421da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 23431da177e4SLinus Torvalds ccw->count = 8; 23441da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 23451da177e4SLinus Torvalds ccw++; 23461da177e4SLinus Torvalds } 23471da177e4SLinus Torvalds } 2348d42e1712SStefan Haberland } 2349d42e1712SStefan Haberland 2350d42e1712SStefan Haberland fcp->startdev = startdev; 2351d42e1712SStefan Haberland fcp->memdev = startdev; 235229b8dd9dSStefan Haberland fcp->basedev = base; 2353eb6e199bSStefan Weinhuber fcp->retries = 256; 2354d42e1712SStefan Haberland fcp->expires = startdev->default_expires * HZ; 23551aae0560SHeiko Carstens fcp->buildclk = get_tod_clock(); 23561da177e4SLinus Torvalds fcp->status = DASD_CQR_FILLED; 2357d42e1712SStefan Haberland 23581da177e4SLinus Torvalds return fcp; 23591da177e4SLinus Torvalds } 23601da177e4SLinus Torvalds 2361570d237cSJan Höppner /* 2362570d237cSJan Höppner * Wrapper function to build a CCW request depending on input data 2363570d237cSJan Höppner */ 2364570d237cSJan Höppner static struct dasd_ccw_req * 2365570d237cSJan Höppner dasd_eckd_format_build_ccw_req(struct dasd_device *base, 2366570d237cSJan Höppner struct format_data_t *fdata, int enable_pav) 2367d42e1712SStefan Haberland { 2368570d237cSJan Höppner return dasd_eckd_build_format(base, fdata, enable_pav); 2369570d237cSJan Höppner } 2370570d237cSJan Höppner 2371570d237cSJan Höppner /* 2372570d237cSJan Höppner * Sanity checks on format_data 2373570d237cSJan Höppner */ 2374570d237cSJan Höppner static int dasd_eckd_format_sanity_checks(struct dasd_device *base, 2375570d237cSJan Höppner struct format_data_t *fdata) 2376570d237cSJan Höppner { 2377543691a4SSebastian Ott struct dasd_eckd_private *private = base->private; 2378d42e1712SStefan Haberland 2379d42e1712SStefan Haberland if (fdata->start_unit >= 2380d42e1712SStefan Haberland (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2381d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2382d42e1712SStefan Haberland "Start track number %u used in formatting is too big\n", 2383d42e1712SStefan Haberland fdata->start_unit); 2384d42e1712SStefan Haberland return -EINVAL; 2385d42e1712SStefan Haberland } 2386d42e1712SStefan Haberland if (fdata->stop_unit >= 2387d42e1712SStefan Haberland (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2388d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2389d42e1712SStefan Haberland "Stop track number %u used in formatting is too big\n", 2390d42e1712SStefan Haberland fdata->stop_unit); 2391d42e1712SStefan Haberland return -EINVAL; 2392d42e1712SStefan Haberland } 2393d42e1712SStefan Haberland if (fdata->start_unit > fdata->stop_unit) { 2394d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2395d42e1712SStefan Haberland "Start track %u used in formatting exceeds end track\n", 2396d42e1712SStefan Haberland fdata->start_unit); 2397d42e1712SStefan Haberland return -EINVAL; 2398d42e1712SStefan Haberland } 2399d42e1712SStefan Haberland if (dasd_check_blocksize(fdata->blksize) != 0) { 2400d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2401d42e1712SStefan Haberland "The DASD cannot be formatted with block size %u\n", 2402d42e1712SStefan Haberland fdata->blksize); 2403d42e1712SStefan Haberland return -EINVAL; 2404d42e1712SStefan Haberland } 2405570d237cSJan Höppner return 0; 2406570d237cSJan Höppner } 2407570d237cSJan Höppner 2408570d237cSJan Höppner /* 2409570d237cSJan Höppner * This function will process format_data originally coming from an IOCTL 2410570d237cSJan Höppner */ 2411570d237cSJan Höppner static int dasd_eckd_format_process_data(struct dasd_device *base, 2412570d237cSJan Höppner struct format_data_t *fdata, 2413570d237cSJan Höppner int enable_pav) 2414570d237cSJan Höppner { 2415543691a4SSebastian Ott struct dasd_eckd_private *private = base->private; 2416570d237cSJan Höppner struct dasd_ccw_req *cqr, *n; 2417570d237cSJan Höppner struct list_head format_queue; 2418570d237cSJan Höppner struct dasd_device *device; 2419570d237cSJan Höppner int old_start, old_stop, format_step; 2420570d237cSJan Höppner int step, retry; 2421570d237cSJan Höppner int rc; 2422570d237cSJan Höppner 2423570d237cSJan Höppner rc = dasd_eckd_format_sanity_checks(base, fdata); 2424570d237cSJan Höppner if (rc) 2425570d237cSJan Höppner return rc; 2426d42e1712SStefan Haberland 2427d42e1712SStefan Haberland INIT_LIST_HEAD(&format_queue); 2428d42e1712SStefan Haberland 242946d1c03cSJan Höppner old_start = fdata->start_unit; 243029b8dd9dSStefan Haberland old_stop = fdata->stop_unit; 2431d42e1712SStefan Haberland 243246d1c03cSJan Höppner format_step = DASD_CQR_MAX_CCW / recs_per_track(&private->rdc_data, 0, 2433d42e1712SStefan Haberland fdata->blksize); 243446d1c03cSJan Höppner do { 243546d1c03cSJan Höppner retry = 0; 2436d42e1712SStefan Haberland while (fdata->start_unit <= old_stop) { 2437d42e1712SStefan Haberland step = fdata->stop_unit - fdata->start_unit + 1; 243846d1c03cSJan Höppner if (step > format_step) { 243946d1c03cSJan Höppner fdata->stop_unit = 244046d1c03cSJan Höppner fdata->start_unit + format_step - 1; 244146d1c03cSJan Höppner } 2442d42e1712SStefan Haberland 2443570d237cSJan Höppner cqr = dasd_eckd_format_build_ccw_req(base, fdata, 2444570d237cSJan Höppner enable_pav); 2445d42e1712SStefan Haberland if (IS_ERR(cqr)) { 244646d1c03cSJan Höppner rc = PTR_ERR(cqr); 244746d1c03cSJan Höppner if (rc == -ENOMEM) { 244846d1c03cSJan Höppner if (list_empty(&format_queue)) 244946d1c03cSJan Höppner goto out; 2450d42e1712SStefan Haberland /* 245146d1c03cSJan Höppner * not enough memory available, start 245246d1c03cSJan Höppner * requests retry after first requests 245346d1c03cSJan Höppner * were finished 2454d42e1712SStefan Haberland */ 245546d1c03cSJan Höppner retry = 1; 245646d1c03cSJan Höppner break; 2457d42e1712SStefan Haberland } 245846d1c03cSJan Höppner goto out_err; 245946d1c03cSJan Höppner } 246046d1c03cSJan Höppner list_add_tail(&cqr->blocklist, &format_queue); 2461d42e1712SStefan Haberland 2462d42e1712SStefan Haberland fdata->start_unit = fdata->stop_unit + 1; 2463d42e1712SStefan Haberland fdata->stop_unit = old_stop; 2464d42e1712SStefan Haberland } 2465d42e1712SStefan Haberland 246646d1c03cSJan Höppner rc = dasd_sleep_on_queue(&format_queue); 2467d42e1712SStefan Haberland 246846d1c03cSJan Höppner out_err: 2469d42e1712SStefan Haberland list_for_each_entry_safe(cqr, n, &format_queue, blocklist) { 2470d42e1712SStefan Haberland device = cqr->startdev; 2471543691a4SSebastian Ott private = device->private; 2472d42e1712SStefan Haberland if (cqr->status == DASD_CQR_FAILED) 2473d42e1712SStefan Haberland rc = -EIO; 2474d42e1712SStefan Haberland list_del_init(&cqr->blocklist); 2475d42e1712SStefan Haberland dasd_sfree_request(cqr, device); 2476d42e1712SStefan Haberland private->count--; 2477d42e1712SStefan Haberland } 2478d42e1712SStefan Haberland 247946d1c03cSJan Höppner if (rc) 248046d1c03cSJan Höppner goto out; 248129b8dd9dSStefan Haberland 248246d1c03cSJan Höppner } while (retry); 248346d1c03cSJan Höppner 248446d1c03cSJan Höppner out: 248546d1c03cSJan Höppner fdata->start_unit = old_start; 248646d1c03cSJan Höppner fdata->stop_unit = old_stop; 2487d42e1712SStefan Haberland 2488d42e1712SStefan Haberland return rc; 2489d42e1712SStefan Haberland } 2490d42e1712SStefan Haberland 2491570d237cSJan Höppner static int dasd_eckd_format_device(struct dasd_device *base, 2492570d237cSJan Höppner struct format_data_t *fdata, int enable_pav) 2493570d237cSJan Höppner { 2494570d237cSJan Höppner return dasd_eckd_format_process_data(base, fdata, enable_pav); 2495570d237cSJan Höppner } 2496570d237cSJan Höppner 24978e09f215SStefan Weinhuber static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 24981da177e4SLinus Torvalds { 2499a2ace466SHannes Reinecke if (cqr->retries < 0) { 2500a2ace466SHannes Reinecke cqr->status = DASD_CQR_FAILED; 2501a2ace466SHannes Reinecke return; 2502a2ace466SHannes Reinecke } 25038e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 25048e09f215SStefan Weinhuber if (cqr->block && (cqr->startdev != cqr->block->base)) { 25058e09f215SStefan Weinhuber dasd_eckd_reset_ccw_to_base_io(cqr); 25068e09f215SStefan Weinhuber cqr->startdev = cqr->block->base; 2507a4d26c6aSStefan Weinhuber cqr->lpm = cqr->block->base->path_data.opm; 25081da177e4SLinus Torvalds } 25098e09f215SStefan Weinhuber }; 25101da177e4SLinus Torvalds 25111da177e4SLinus Torvalds static dasd_erp_fn_t 25121da177e4SLinus Torvalds dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 25131da177e4SLinus Torvalds { 25148e09f215SStefan Weinhuber struct dasd_device *device = (struct dasd_device *) cqr->startdev; 25151da177e4SLinus Torvalds struct ccw_device *cdev = device->cdev; 25161da177e4SLinus Torvalds 25171da177e4SLinus Torvalds switch (cdev->id.cu_type) { 25181da177e4SLinus Torvalds case 0x3990: 25191da177e4SLinus Torvalds case 0x2105: 25201da177e4SLinus Torvalds case 0x2107: 25211da177e4SLinus Torvalds case 0x1750: 25221da177e4SLinus Torvalds return dasd_3990_erp_action; 25231da177e4SLinus Torvalds case 0x9343: 25241da177e4SLinus Torvalds case 0x3880: 25251da177e4SLinus Torvalds default: 25261da177e4SLinus Torvalds return dasd_default_erp_action; 25271da177e4SLinus Torvalds } 25281da177e4SLinus Torvalds } 25291da177e4SLinus Torvalds 25301da177e4SLinus Torvalds static dasd_erp_fn_t 25311da177e4SLinus Torvalds dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 25321da177e4SLinus Torvalds { 25331da177e4SLinus Torvalds return dasd_default_erp_postaction; 25341da177e4SLinus Torvalds } 25351da177e4SLinus Torvalds 25365a27e60dSStefan Weinhuber static void dasd_eckd_check_for_device_change(struct dasd_device *device, 25375a27e60dSStefan Weinhuber struct dasd_ccw_req *cqr, 25388e09f215SStefan Weinhuber struct irb *irb) 25398e09f215SStefan Weinhuber { 25408e09f215SStefan Weinhuber char mask; 2541f3eb5384SStefan Weinhuber char *sense = NULL; 2542543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 25438e09f215SStefan Weinhuber 25448e09f215SStefan Weinhuber /* first of all check for state change pending interrupt */ 25458e09f215SStefan Weinhuber mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 2546f3eb5384SStefan Weinhuber if ((scsw_dstat(&irb->scsw) & mask) == mask) { 2547c8d1c0ffSStefan Haberland /* 2548c8d1c0ffSStefan Haberland * for alias only, not in offline processing 2549c8d1c0ffSStefan Haberland * and only if not suspended 2550c8d1c0ffSStefan Haberland */ 2551501183f2SStefan Haberland if (!device->block && private->lcu && 255225e2cf1cSStefan Haberland device->state == DASD_STATE_ONLINE && 2553c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_OFFLINE, &device->flags) && 2554c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 2555501183f2SStefan Haberland /* schedule worker to reload device */ 2556501183f2SStefan Haberland dasd_reload_device(device); 2557501183f2SStefan Haberland } 25588e09f215SStefan Weinhuber dasd_generic_handle_state_change(device); 25598e09f215SStefan Weinhuber return; 25608e09f215SStefan Weinhuber } 25618e09f215SStefan Weinhuber 2562a5a0061fSStefan Weinhuber sense = dasd_get_sense(irb); 25635a27e60dSStefan Weinhuber if (!sense) 25645a27e60dSStefan Weinhuber return; 25655a27e60dSStefan Weinhuber 25665a27e60dSStefan Weinhuber /* summary unit check */ 2567c7a29e56SStefan Weinhuber if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) && 2568a5a0061fSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { 256959a9ed5fSStefan Haberland if (test_and_set_bit(DASD_FLAG_SUC, &device->flags)) { 257059a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 257159a9ed5fSStefan Haberland "eckd suc: device already notified"); 257259a9ed5fSStefan Haberland return; 257359a9ed5fSStefan Haberland } 257459a9ed5fSStefan Haberland sense = dasd_get_sense(irb); 257559a9ed5fSStefan Haberland if (!sense) { 257659a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 257759a9ed5fSStefan Haberland "eckd suc: no reason code available"); 257859a9ed5fSStefan Haberland clear_bit(DASD_FLAG_SUC, &device->flags); 257959a9ed5fSStefan Haberland return; 258059a9ed5fSStefan Haberland 258159a9ed5fSStefan Haberland } 258259a9ed5fSStefan Haberland private->suc_reason = sense[8]; 258359a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_NOTICE, device, "%s %x", 258459a9ed5fSStefan Haberland "eckd handle summary unit check: reason", 258559a9ed5fSStefan Haberland private->suc_reason); 258659a9ed5fSStefan Haberland dasd_get_device(device); 258759a9ed5fSStefan Haberland if (!schedule_work(&device->suc_work)) 258859a9ed5fSStefan Haberland dasd_put_device(device); 258959a9ed5fSStefan Haberland 25908e09f215SStefan Weinhuber return; 25918e09f215SStefan Weinhuber } 25928e09f215SStefan Weinhuber 2593f60c768cSStefan Haberland /* service information message SIM */ 25945a27e60dSStefan Weinhuber if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && 2595f3eb5384SStefan Weinhuber ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 2596f3eb5384SStefan Weinhuber dasd_3990_erp_handle_sim(device, sense); 2597f60c768cSStefan Haberland return; 2598f60c768cSStefan Haberland } 2599f60c768cSStefan Haberland 26005a27e60dSStefan Weinhuber /* loss of device reservation is handled via base devices only 26015a27e60dSStefan Weinhuber * as alias devices may be used with several bases 26025a27e60dSStefan Weinhuber */ 2603c7a29e56SStefan Weinhuber if (device->block && (sense[27] & DASD_SENSE_BIT_0) && 2604c7a29e56SStefan Weinhuber (sense[7] == 0x3F) && 26055a27e60dSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && 26065a27e60dSStefan Weinhuber test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { 26075a27e60dSStefan Weinhuber if (device->features & DASD_FEATURE_FAILONSLCK) 26085a27e60dSStefan Weinhuber set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); 26095a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 26105a27e60dSStefan Weinhuber dev_err(&device->cdev->dev, 26115a27e60dSStefan Weinhuber "The device reservation was lost\n"); 2612ada3df91SStefan Haberland } 26135a27e60dSStefan Weinhuber } 2614f3eb5384SStefan Weinhuber 2615f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( 2616f3eb5384SStefan Weinhuber struct dasd_device *startdev, 26178e09f215SStefan Weinhuber struct dasd_block *block, 2618f3eb5384SStefan Weinhuber struct request *req, 2619f3eb5384SStefan Weinhuber sector_t first_rec, 2620f3eb5384SStefan Weinhuber sector_t last_rec, 2621f3eb5384SStefan Weinhuber sector_t first_trk, 2622f3eb5384SStefan Weinhuber sector_t last_trk, 2623f3eb5384SStefan Weinhuber unsigned int first_offs, 2624f3eb5384SStefan Weinhuber unsigned int last_offs, 2625f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 2626f3eb5384SStefan Weinhuber unsigned int blksize) 26271da177e4SLinus Torvalds { 26281da177e4SLinus Torvalds struct dasd_eckd_private *private; 26291da177e4SLinus Torvalds unsigned long *idaws; 26301da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 26311da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 26321da177e4SLinus Torvalds struct ccw1 *ccw; 26335705f702SNeilBrown struct req_iterator iter; 26347988613bSKent Overstreet struct bio_vec bv; 26351da177e4SLinus Torvalds char *dst; 2636f3eb5384SStefan Weinhuber unsigned int off; 26371da177e4SLinus Torvalds int count, cidaw, cplength, datasize; 2638f3eb5384SStefan Weinhuber sector_t recid; 26391da177e4SLinus Torvalds unsigned char cmd, rcmd; 26408e09f215SStefan Weinhuber int use_prefix; 26418e09f215SStefan Weinhuber struct dasd_device *basedev; 26421da177e4SLinus Torvalds 26438e09f215SStefan Weinhuber basedev = block->base; 2644543691a4SSebastian Ott private = basedev->private; 26451da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 26461da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_READ_MT; 26471da177e4SLinus Torvalds else if (rq_data_dir(req) == WRITE) 26481da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_WRITE_MT; 26491da177e4SLinus Torvalds else 26501da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 2651f3eb5384SStefan Weinhuber 26521da177e4SLinus Torvalds /* Check struct bio and count the number of blocks for the request. */ 26531da177e4SLinus Torvalds count = 0; 26541da177e4SLinus Torvalds cidaw = 0; 26555705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 26567988613bSKent Overstreet if (bv.bv_len & (blksize - 1)) 26571da177e4SLinus Torvalds /* Eckd can only do full blocks. */ 26581da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 26597988613bSKent Overstreet count += bv.bv_len >> (block->s2b_shift + 9); 26607988613bSKent Overstreet if (idal_is_needed (page_address(bv.bv_page), bv.bv_len)) 26617988613bSKent Overstreet cidaw += bv.bv_len >> (block->s2b_shift + 9); 26621da177e4SLinus Torvalds } 26631da177e4SLinus Torvalds /* Paranoia. */ 26641da177e4SLinus Torvalds if (count != last_rec - first_rec + 1) 26651da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 26668e09f215SStefan Weinhuber 26678e09f215SStefan Weinhuber /* use the prefix command if available */ 26688e09f215SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 26698e09f215SStefan Weinhuber if (use_prefix) { 26708e09f215SStefan Weinhuber /* 1x prefix + number of blocks */ 26718e09f215SStefan Weinhuber cplength = 2 + count; 26728e09f215SStefan Weinhuber /* 1x prefix + cidaws*sizeof(long) */ 26738e09f215SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 26748e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 26758e09f215SStefan Weinhuber cidaw * sizeof(unsigned long); 26768e09f215SStefan Weinhuber } else { 26771da177e4SLinus Torvalds /* 1x define extent + 1x locate record + number of blocks */ 26781da177e4SLinus Torvalds cplength = 2 + count; 26791da177e4SLinus Torvalds /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 26808e09f215SStefan Weinhuber datasize = sizeof(struct DE_eckd_data) + 26818e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 26821da177e4SLinus Torvalds cidaw * sizeof(unsigned long); 26838e09f215SStefan Weinhuber } 26841da177e4SLinus Torvalds /* Find out the number of additional locate record ccws for cdl. */ 26851da177e4SLinus Torvalds if (private->uses_cdl && first_rec < 2*blk_per_trk) { 26861da177e4SLinus Torvalds if (last_rec >= 2*blk_per_trk) 26871da177e4SLinus Torvalds count = 2*blk_per_trk - first_rec; 26881da177e4SLinus Torvalds cplength += count; 26891da177e4SLinus Torvalds datasize += count*sizeof(struct LO_eckd_data); 26901da177e4SLinus Torvalds } 26911da177e4SLinus Torvalds /* Allocate the ccw request. */ 269268b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 269368b781feSStefan Haberland startdev); 26941da177e4SLinus Torvalds if (IS_ERR(cqr)) 26951da177e4SLinus Torvalds return cqr; 26961da177e4SLinus Torvalds ccw = cqr->cpaddr; 26978e09f215SStefan Weinhuber /* First ccw is define extent or prefix. */ 26988e09f215SStefan Weinhuber if (use_prefix) { 26998e09f215SStefan Weinhuber if (prefix(ccw++, cqr->data, first_trk, 27008e09f215SStefan Weinhuber last_trk, cmd, basedev, startdev) == -EAGAIN) { 27018e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 27028e09f215SStefan Weinhuber * Try again later. 27038e09f215SStefan Weinhuber */ 27048e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2705d54853efSMartin Schwidefsky return ERR_PTR(-EAGAIN); 2706d54853efSMartin Schwidefsky } 27078e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 27088e09f215SStefan Weinhuber sizeof(struct PFX_eckd_data)); 27098e09f215SStefan Weinhuber } else { 27108e09f215SStefan Weinhuber if (define_extent(ccw++, cqr->data, first_trk, 2711b38f27e8SStefan Haberland last_trk, cmd, basedev) == -EAGAIN) { 27128e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 27138e09f215SStefan Weinhuber * Try again later. 27148e09f215SStefan Weinhuber */ 27158e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 27168e09f215SStefan Weinhuber return ERR_PTR(-EAGAIN); 27178e09f215SStefan Weinhuber } 27188e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 27198e09f215SStefan Weinhuber sizeof(struct DE_eckd_data)); 27208e09f215SStefan Weinhuber } 27211da177e4SLinus Torvalds /* Build locate_record+read/write/ccws. */ 27221da177e4SLinus Torvalds LO_data = (struct LO_eckd_data *) (idaws + cidaw); 27231da177e4SLinus Torvalds recid = first_rec; 27241da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 27251da177e4SLinus Torvalds /* Only standard blocks so there is just one locate record. */ 27261da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 27271da177e4SLinus Torvalds locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 27288e09f215SStefan Weinhuber last_rec - recid + 1, cmd, basedev, blksize); 27291da177e4SLinus Torvalds } 27305705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 27317988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 27321da177e4SLinus Torvalds if (dasd_page_cache) { 27331da177e4SLinus Torvalds char *copy = kmem_cache_alloc(dasd_page_cache, 2734441e143eSChristoph Lameter GFP_DMA | __GFP_NOWARN); 27351da177e4SLinus Torvalds if (copy && rq_data_dir(req) == WRITE) 27367988613bSKent Overstreet memcpy(copy + bv.bv_offset, dst, bv.bv_len); 27371da177e4SLinus Torvalds if (copy) 27387988613bSKent Overstreet dst = copy + bv.bv_offset; 27391da177e4SLinus Torvalds } 27407988613bSKent Overstreet for (off = 0; off < bv.bv_len; off += blksize) { 27411da177e4SLinus Torvalds sector_t trkid = recid; 27421da177e4SLinus Torvalds unsigned int recoffs = sector_div(trkid, blk_per_trk); 27431da177e4SLinus Torvalds rcmd = cmd; 27441da177e4SLinus Torvalds count = blksize; 27451da177e4SLinus Torvalds /* Locate record for cdl special block ? */ 27461da177e4SLinus Torvalds if (private->uses_cdl && recid < 2*blk_per_trk) { 27471da177e4SLinus Torvalds if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 27481da177e4SLinus Torvalds rcmd |= 0x8; 27491da177e4SLinus Torvalds count = dasd_eckd_cdl_reclen(recid); 2750ec5883abSHorst Hummel if (count < blksize && 2751ec5883abSHorst Hummel rq_data_dir(req) == READ) 27521da177e4SLinus Torvalds memset(dst + count, 0xe5, 27531da177e4SLinus Torvalds blksize - count); 27541da177e4SLinus Torvalds } 27551da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 27561da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 27571da177e4SLinus Torvalds trkid, recoffs + 1, 27588e09f215SStefan Weinhuber 1, rcmd, basedev, count); 27591da177e4SLinus Torvalds } 27601da177e4SLinus Torvalds /* Locate record for standard blocks ? */ 27611da177e4SLinus Torvalds if (private->uses_cdl && recid == 2*blk_per_trk) { 27621da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 27631da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 27641da177e4SLinus Torvalds trkid, recoffs + 1, 27651da177e4SLinus Torvalds last_rec - recid + 1, 27668e09f215SStefan Weinhuber cmd, basedev, count); 27671da177e4SLinus Torvalds } 27681da177e4SLinus Torvalds /* Read/write ccw. */ 27691da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 27701da177e4SLinus Torvalds ccw->cmd_code = rcmd; 27711da177e4SLinus Torvalds ccw->count = count; 27721da177e4SLinus Torvalds if (idal_is_needed(dst, blksize)) { 27731da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) idaws; 27741da177e4SLinus Torvalds ccw->flags = CCW_FLAG_IDA; 27751da177e4SLinus Torvalds idaws = idal_create_words(idaws, dst, blksize); 27761da177e4SLinus Torvalds } else { 27771da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) dst; 27781da177e4SLinus Torvalds ccw->flags = 0; 27791da177e4SLinus Torvalds } 27801da177e4SLinus Torvalds ccw++; 27811da177e4SLinus Torvalds dst += blksize; 27821da177e4SLinus Torvalds recid++; 27831da177e4SLinus Torvalds } 27841da177e4SLinus Torvalds } 278513de227bSHolger Smolinski if (blk_noretry_request(req) || 278613de227bSHolger Smolinski block->base->features & DASD_FEATURE_FAILFAST) 27871c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 27888e09f215SStefan Weinhuber cqr->startdev = startdev; 27898e09f215SStefan Weinhuber cqr->memdev = startdev; 27908e09f215SStefan Weinhuber cqr->block = block; 27917c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2792a4d26c6aSStefan Weinhuber cqr->lpm = startdev->path_data.ppm; 27931f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 27941aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 27951da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 27961da177e4SLinus Torvalds return cqr; 27971da177e4SLinus Torvalds } 27981da177e4SLinus Torvalds 2799f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 2800f3eb5384SStefan Weinhuber struct dasd_device *startdev, 2801f3eb5384SStefan Weinhuber struct dasd_block *block, 2802f3eb5384SStefan Weinhuber struct request *req, 2803f3eb5384SStefan Weinhuber sector_t first_rec, 2804f3eb5384SStefan Weinhuber sector_t last_rec, 2805f3eb5384SStefan Weinhuber sector_t first_trk, 2806f3eb5384SStefan Weinhuber sector_t last_trk, 2807f3eb5384SStefan Weinhuber unsigned int first_offs, 2808f3eb5384SStefan Weinhuber unsigned int last_offs, 2809f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 2810f3eb5384SStefan Weinhuber unsigned int blksize) 2811f3eb5384SStefan Weinhuber { 2812f3eb5384SStefan Weinhuber unsigned long *idaws; 2813f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 2814f3eb5384SStefan Weinhuber struct ccw1 *ccw; 2815f3eb5384SStefan Weinhuber struct req_iterator iter; 28167988613bSKent Overstreet struct bio_vec bv; 2817f3eb5384SStefan Weinhuber char *dst, *idaw_dst; 2818f3eb5384SStefan Weinhuber unsigned int cidaw, cplength, datasize; 2819f3eb5384SStefan Weinhuber unsigned int tlf; 2820f3eb5384SStefan Weinhuber sector_t recid; 2821f3eb5384SStefan Weinhuber unsigned char cmd; 2822f3eb5384SStefan Weinhuber struct dasd_device *basedev; 2823f3eb5384SStefan Weinhuber unsigned int trkcount, count, count_to_trk_end; 2824f3eb5384SStefan Weinhuber unsigned int idaw_len, seg_len, part_len, len_to_track_end; 2825f3eb5384SStefan Weinhuber unsigned char new_track, end_idaw; 2826f3eb5384SStefan Weinhuber sector_t trkid; 2827f3eb5384SStefan Weinhuber unsigned int recoffs; 2828f3eb5384SStefan Weinhuber 2829f3eb5384SStefan Weinhuber basedev = block->base; 2830f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) 2831f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 2832f3eb5384SStefan Weinhuber else if (rq_data_dir(req) == WRITE) 2833f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 2834f3eb5384SStefan Weinhuber else 2835f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 2836f3eb5384SStefan Weinhuber 2837f3eb5384SStefan Weinhuber /* Track based I/O needs IDAWs for each page, and not just for 2838f3eb5384SStefan Weinhuber * 64 bit addresses. We need additional idals for pages 2839f3eb5384SStefan Weinhuber * that get filled from two tracks, so we use the number 2840f3eb5384SStefan Weinhuber * of records as upper limit. 2841f3eb5384SStefan Weinhuber */ 2842f3eb5384SStefan Weinhuber cidaw = last_rec - first_rec + 1; 2843f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 2844f3eb5384SStefan Weinhuber 2845f3eb5384SStefan Weinhuber /* 1x prefix + one read/write ccw per track */ 2846f3eb5384SStefan Weinhuber cplength = 1 + trkcount; 2847f3eb5384SStefan Weinhuber 2848f3eb5384SStefan Weinhuber /* on 31-bit we need space for two 32 bit addresses per page 2849f3eb5384SStefan Weinhuber * on 64-bit one 64 bit address 2850f3eb5384SStefan Weinhuber */ 2851f3eb5384SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 2852f3eb5384SStefan Weinhuber cidaw * sizeof(unsigned long long); 2853f3eb5384SStefan Weinhuber 2854f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 285568b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 285668b781feSStefan Haberland startdev); 2857f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 2858f3eb5384SStefan Weinhuber return cqr; 2859f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 2860f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 2861f3eb5384SStefan Weinhuber if (first_trk == last_trk) 2862f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 2863f3eb5384SStefan Weinhuber else 2864f3eb5384SStefan Weinhuber tlf = last_offs + 1; 2865f3eb5384SStefan Weinhuber tlf *= blksize; 2866f3eb5384SStefan Weinhuber 2867f3eb5384SStefan Weinhuber if (prefix_LRE(ccw++, cqr->data, first_trk, 2868f3eb5384SStefan Weinhuber last_trk, cmd, basedev, startdev, 2869f3eb5384SStefan Weinhuber 1 /* format */, first_offs + 1, 2870f3eb5384SStefan Weinhuber trkcount, blksize, 2871f3eb5384SStefan Weinhuber tlf) == -EAGAIN) { 2872f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 2873f3eb5384SStefan Weinhuber * Try again later. 2874f3eb5384SStefan Weinhuber */ 2875f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2876f3eb5384SStefan Weinhuber return ERR_PTR(-EAGAIN); 2877f3eb5384SStefan Weinhuber } 2878f3eb5384SStefan Weinhuber 2879f3eb5384SStefan Weinhuber /* 2880f3eb5384SStefan Weinhuber * The translation of request into ccw programs must meet the 2881f3eb5384SStefan Weinhuber * following conditions: 2882f3eb5384SStefan Weinhuber * - all idaws but the first and the last must address full pages 2883f3eb5384SStefan Weinhuber * (or 2K blocks on 31-bit) 2884f3eb5384SStefan Weinhuber * - the scope of a ccw and it's idal ends with the track boundaries 2885f3eb5384SStefan Weinhuber */ 2886f3eb5384SStefan Weinhuber idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); 2887f3eb5384SStefan Weinhuber recid = first_rec; 2888f3eb5384SStefan Weinhuber new_track = 1; 2889f3eb5384SStefan Weinhuber end_idaw = 0; 2890f3eb5384SStefan Weinhuber len_to_track_end = 0; 2891246ccea1SMartin Schwidefsky idaw_dst = NULL; 2892f3eb5384SStefan Weinhuber idaw_len = 0; 2893f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 28947988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 28957988613bSKent Overstreet seg_len = bv.bv_len; 2896f3eb5384SStefan Weinhuber while (seg_len) { 2897f3eb5384SStefan Weinhuber if (new_track) { 2898f3eb5384SStefan Weinhuber trkid = recid; 2899f3eb5384SStefan Weinhuber recoffs = sector_div(trkid, blk_per_trk); 2900f3eb5384SStefan Weinhuber count_to_trk_end = blk_per_trk - recoffs; 2901f3eb5384SStefan Weinhuber count = min((last_rec - recid + 1), 2902f3eb5384SStefan Weinhuber (sector_t)count_to_trk_end); 2903f3eb5384SStefan Weinhuber len_to_track_end = count * blksize; 2904f3eb5384SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 2905f3eb5384SStefan Weinhuber ccw->cmd_code = cmd; 2906f3eb5384SStefan Weinhuber ccw->count = len_to_track_end; 2907f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 2908f3eb5384SStefan Weinhuber ccw->flags = CCW_FLAG_IDA; 2909f3eb5384SStefan Weinhuber ccw++; 2910f3eb5384SStefan Weinhuber recid += count; 2911f3eb5384SStefan Weinhuber new_track = 0; 291252db45c3SStefan Weinhuber /* first idaw for a ccw may start anywhere */ 291352db45c3SStefan Weinhuber if (!idaw_dst) 291452db45c3SStefan Weinhuber idaw_dst = dst; 2915f3eb5384SStefan Weinhuber } 291652db45c3SStefan Weinhuber /* If we start a new idaw, we must make sure that it 291752db45c3SStefan Weinhuber * starts on an IDA_BLOCK_SIZE boundary. 2918f3eb5384SStefan Weinhuber * If we continue an idaw, we must make sure that the 2919f3eb5384SStefan Weinhuber * current segment begins where the so far accumulated 2920f3eb5384SStefan Weinhuber * idaw ends 2921f3eb5384SStefan Weinhuber */ 292252db45c3SStefan Weinhuber if (!idaw_dst) { 292352db45c3SStefan Weinhuber if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { 292452db45c3SStefan Weinhuber dasd_sfree_request(cqr, startdev); 292552db45c3SStefan Weinhuber return ERR_PTR(-ERANGE); 292652db45c3SStefan Weinhuber } else 2927f3eb5384SStefan Weinhuber idaw_dst = dst; 292852db45c3SStefan Weinhuber } 2929f3eb5384SStefan Weinhuber if ((idaw_dst + idaw_len) != dst) { 2930f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2931f3eb5384SStefan Weinhuber return ERR_PTR(-ERANGE); 2932f3eb5384SStefan Weinhuber } 2933f3eb5384SStefan Weinhuber part_len = min(seg_len, len_to_track_end); 2934f3eb5384SStefan Weinhuber seg_len -= part_len; 2935f3eb5384SStefan Weinhuber dst += part_len; 2936f3eb5384SStefan Weinhuber idaw_len += part_len; 2937f3eb5384SStefan Weinhuber len_to_track_end -= part_len; 2938f3eb5384SStefan Weinhuber /* collected memory area ends on an IDA_BLOCK border, 2939f3eb5384SStefan Weinhuber * -> create an idaw 2940f3eb5384SStefan Weinhuber * idal_create_words will handle cases where idaw_len 2941f3eb5384SStefan Weinhuber * is larger then IDA_BLOCK_SIZE 2942f3eb5384SStefan Weinhuber */ 2943f3eb5384SStefan Weinhuber if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) 2944f3eb5384SStefan Weinhuber end_idaw = 1; 2945f3eb5384SStefan Weinhuber /* We also need to end the idaw at track end */ 2946f3eb5384SStefan Weinhuber if (!len_to_track_end) { 2947f3eb5384SStefan Weinhuber new_track = 1; 2948f3eb5384SStefan Weinhuber end_idaw = 1; 2949f3eb5384SStefan Weinhuber } 2950f3eb5384SStefan Weinhuber if (end_idaw) { 2951f3eb5384SStefan Weinhuber idaws = idal_create_words(idaws, idaw_dst, 2952f3eb5384SStefan Weinhuber idaw_len); 2953246ccea1SMartin Schwidefsky idaw_dst = NULL; 2954f3eb5384SStefan Weinhuber idaw_len = 0; 2955f3eb5384SStefan Weinhuber end_idaw = 0; 2956f3eb5384SStefan Weinhuber } 2957f3eb5384SStefan Weinhuber } 2958f3eb5384SStefan Weinhuber } 2959f3eb5384SStefan Weinhuber 2960f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 2961f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 2962f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2963f3eb5384SStefan Weinhuber cqr->startdev = startdev; 2964f3eb5384SStefan Weinhuber cqr->memdev = startdev; 2965f3eb5384SStefan Weinhuber cqr->block = block; 29667c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2967a4d26c6aSStefan Weinhuber cqr->lpm = startdev->path_data.ppm; 29681f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 29691aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 2970f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 2971f3eb5384SStefan Weinhuber return cqr; 2972f3eb5384SStefan Weinhuber } 2973f3eb5384SStefan Weinhuber 2974f3eb5384SStefan Weinhuber static int prepare_itcw(struct itcw *itcw, 2975f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 2976f3eb5384SStefan Weinhuber struct dasd_device *basedev, 2977f3eb5384SStefan Weinhuber struct dasd_device *startdev, 2978f3eb5384SStefan Weinhuber unsigned int rec_on_trk, int count, 2979f3eb5384SStefan Weinhuber unsigned int blksize, 2980f3eb5384SStefan Weinhuber unsigned int total_data_size, 2981f3eb5384SStefan Weinhuber unsigned int tlf, 2982f3eb5384SStefan Weinhuber unsigned int blk_per_trk) 2983f3eb5384SStefan Weinhuber { 2984f3eb5384SStefan Weinhuber struct PFX_eckd_data pfxdata; 2985f3eb5384SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 2986f3eb5384SStefan Weinhuber struct DE_eckd_data *dedata; 2987f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 2988f3eb5384SStefan Weinhuber struct dcw *dcw; 2989f3eb5384SStefan Weinhuber 2990f3eb5384SStefan Weinhuber u32 begcyl, endcyl; 2991f3eb5384SStefan Weinhuber u16 heads, beghead, endhead; 2992f3eb5384SStefan Weinhuber u8 pfx_cmd; 2993f3eb5384SStefan Weinhuber 2994f3eb5384SStefan Weinhuber int rc = 0; 2995f3eb5384SStefan Weinhuber int sector = 0; 2996f3eb5384SStefan Weinhuber int dn, d; 2997f3eb5384SStefan Weinhuber 2998f3eb5384SStefan Weinhuber 2999f3eb5384SStefan Weinhuber /* setup prefix data */ 3000543691a4SSebastian Ott basepriv = basedev->private; 3001543691a4SSebastian Ott startpriv = startdev->private; 3002f3eb5384SStefan Weinhuber dedata = &pfxdata.define_extent; 3003f3eb5384SStefan Weinhuber lredata = &pfxdata.locate_record; 3004f3eb5384SStefan Weinhuber 3005f3eb5384SStefan Weinhuber memset(&pfxdata, 0, sizeof(pfxdata)); 3006f3eb5384SStefan Weinhuber pfxdata.format = 1; /* PFX with LRE */ 3007f3eb5384SStefan Weinhuber pfxdata.base_address = basepriv->ned->unit_addr; 3008f3eb5384SStefan Weinhuber pfxdata.base_lss = basepriv->ned->ID; 3009f3eb5384SStefan Weinhuber pfxdata.validity.define_extent = 1; 3010f3eb5384SStefan Weinhuber 3011f3eb5384SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 3012f3eb5384SStefan Weinhuber if (startpriv->uid.type != UA_BASE_DEVICE) { 3013f3eb5384SStefan Weinhuber pfxdata.validity.verify_base = 1; 3014f3eb5384SStefan Weinhuber if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 3015f3eb5384SStefan Weinhuber pfxdata.validity.hyper_pav = 1; 3016f3eb5384SStefan Weinhuber } 3017f3eb5384SStefan Weinhuber 3018f3eb5384SStefan Weinhuber switch (cmd) { 3019f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 3020f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 3021f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 3022f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 3023f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 3024f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 3025f3eb5384SStefan Weinhuber lredata->operation.operation = 0x0C; 3026f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x01; 3027f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX_READ; 3028f3eb5384SStefan Weinhuber break; 3029f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 3030f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 3031f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 3032f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 3033f3eb5384SStefan Weinhuber rc = check_XRC_on_prefix(&pfxdata, basedev); 3034f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 3035f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 3036f3eb5384SStefan Weinhuber lredata->operation.operation = 0x3F; 3037f3eb5384SStefan Weinhuber lredata->extended_operation = 0x23; 3038f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x2; 3039f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX; 3040f3eb5384SStefan Weinhuber break; 3041f3eb5384SStefan Weinhuber default: 3042f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 3043f3eb5384SStefan Weinhuber "prepare itcw, unknown opcode 0x%x", cmd); 3044f3eb5384SStefan Weinhuber BUG(); 3045f3eb5384SStefan Weinhuber break; 3046f3eb5384SStefan Weinhuber } 3047f3eb5384SStefan Weinhuber if (rc) 3048f3eb5384SStefan Weinhuber return rc; 3049f3eb5384SStefan Weinhuber 3050f3eb5384SStefan Weinhuber dedata->attributes.mode = 0x3; /* ECKD */ 3051f3eb5384SStefan Weinhuber 3052f3eb5384SStefan Weinhuber heads = basepriv->rdc_data.trk_per_cyl; 3053f3eb5384SStefan Weinhuber begcyl = trk / heads; 3054f3eb5384SStefan Weinhuber beghead = trk % heads; 3055f3eb5384SStefan Weinhuber endcyl = totrk / heads; 3056f3eb5384SStefan Weinhuber endhead = totrk % heads; 3057f3eb5384SStefan Weinhuber 3058f3eb5384SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 3059f3eb5384SStefan Weinhuber if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 3060f3eb5384SStefan Weinhuber dedata->attributes.operation == DASD_SEQ_ACCESS) { 3061f3eb5384SStefan Weinhuber 3062f3eb5384SStefan Weinhuber if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 3063f3eb5384SStefan Weinhuber endcyl += basepriv->attrib.nr_cyl; 3064f3eb5384SStefan Weinhuber else 3065f3eb5384SStefan Weinhuber endcyl = (basepriv->real_cyl - 1); 3066f3eb5384SStefan Weinhuber } 3067f3eb5384SStefan Weinhuber 3068f3eb5384SStefan Weinhuber set_ch_t(&dedata->beg_ext, begcyl, beghead); 3069f3eb5384SStefan Weinhuber set_ch_t(&dedata->end_ext, endcyl, endhead); 3070f3eb5384SStefan Weinhuber 3071f3eb5384SStefan Weinhuber dedata->ep_format = 0x20; /* records per track is valid */ 3072f3eb5384SStefan Weinhuber dedata->ep_rec_per_track = blk_per_trk; 3073f3eb5384SStefan Weinhuber 3074f3eb5384SStefan Weinhuber if (rec_on_trk) { 3075f3eb5384SStefan Weinhuber switch (basepriv->rdc_data.dev_type) { 3076f3eb5384SStefan Weinhuber case 0x3390: 3077f3eb5384SStefan Weinhuber dn = ceil_quot(blksize + 6, 232); 3078f3eb5384SStefan Weinhuber d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); 3079f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 3080f3eb5384SStefan Weinhuber break; 3081f3eb5384SStefan Weinhuber case 0x3380: 3082f3eb5384SStefan Weinhuber d = 7 + ceil_quot(blksize + 12, 32); 3083f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 3084f3eb5384SStefan Weinhuber break; 3085f3eb5384SStefan Weinhuber } 3086f3eb5384SStefan Weinhuber } 3087f3eb5384SStefan Weinhuber 3088f3eb5384SStefan Weinhuber lredata->auxiliary.length_valid = 1; 3089f3eb5384SStefan Weinhuber lredata->auxiliary.length_scope = 1; 3090f3eb5384SStefan Weinhuber lredata->auxiliary.imbedded_ccw_valid = 1; 3091f3eb5384SStefan Weinhuber lredata->length = tlf; 3092f3eb5384SStefan Weinhuber lredata->imbedded_ccw = cmd; 3093f3eb5384SStefan Weinhuber lredata->count = count; 3094f3eb5384SStefan Weinhuber lredata->sector = sector; 3095f3eb5384SStefan Weinhuber set_ch_t(&lredata->seek_addr, begcyl, beghead); 3096f3eb5384SStefan Weinhuber lredata->search_arg.cyl = lredata->seek_addr.cyl; 3097f3eb5384SStefan Weinhuber lredata->search_arg.head = lredata->seek_addr.head; 3098f3eb5384SStefan Weinhuber lredata->search_arg.record = rec_on_trk; 3099f3eb5384SStefan Weinhuber 3100f3eb5384SStefan Weinhuber dcw = itcw_add_dcw(itcw, pfx_cmd, 0, 3101f3eb5384SStefan Weinhuber &pfxdata, sizeof(pfxdata), total_data_size); 310282a7b955SThomas Meyer return PTR_RET(dcw); 3103f3eb5384SStefan Weinhuber } 3104f3eb5384SStefan Weinhuber 3105f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 3106f3eb5384SStefan Weinhuber struct dasd_device *startdev, 3107f3eb5384SStefan Weinhuber struct dasd_block *block, 3108f3eb5384SStefan Weinhuber struct request *req, 3109f3eb5384SStefan Weinhuber sector_t first_rec, 3110f3eb5384SStefan Weinhuber sector_t last_rec, 3111f3eb5384SStefan Weinhuber sector_t first_trk, 3112f3eb5384SStefan Weinhuber sector_t last_trk, 3113f3eb5384SStefan Weinhuber unsigned int first_offs, 3114f3eb5384SStefan Weinhuber unsigned int last_offs, 3115f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 3116f3eb5384SStefan Weinhuber unsigned int blksize) 3117f3eb5384SStefan Weinhuber { 3118f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 3119f3eb5384SStefan Weinhuber struct req_iterator iter; 31207988613bSKent Overstreet struct bio_vec bv; 3121f3eb5384SStefan Weinhuber char *dst; 3122f3eb5384SStefan Weinhuber unsigned int trkcount, ctidaw; 3123f3eb5384SStefan Weinhuber unsigned char cmd; 3124f3eb5384SStefan Weinhuber struct dasd_device *basedev; 3125f3eb5384SStefan Weinhuber unsigned int tlf; 3126f3eb5384SStefan Weinhuber struct itcw *itcw; 3127f3eb5384SStefan Weinhuber struct tidaw *last_tidaw = NULL; 3128f3eb5384SStefan Weinhuber int itcw_op; 3129f3eb5384SStefan Weinhuber size_t itcw_size; 3130ef19298bSStefan Weinhuber u8 tidaw_flags; 3131ef19298bSStefan Weinhuber unsigned int seg_len, part_len, len_to_track_end; 3132ef19298bSStefan Weinhuber unsigned char new_track; 3133ef19298bSStefan Weinhuber sector_t recid, trkid; 3134ef19298bSStefan Weinhuber unsigned int offs; 3135ef19298bSStefan Weinhuber unsigned int count, count_to_trk_end; 3136cd10502bSJulia Lawall int ret; 3137f3eb5384SStefan Weinhuber 3138f3eb5384SStefan Weinhuber basedev = block->base; 3139f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) { 3140f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 3141f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_READ; 3142f3eb5384SStefan Weinhuber } else if (rq_data_dir(req) == WRITE) { 3143f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 3144f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_WRITE; 3145f3eb5384SStefan Weinhuber } else 3146f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 3147f3eb5384SStefan Weinhuber 3148f3eb5384SStefan Weinhuber /* trackbased I/O needs address all memory via TIDAWs, 3149f3eb5384SStefan Weinhuber * not just for 64 bit addresses. This allows us to map 3150f3eb5384SStefan Weinhuber * each segment directly to one tidaw. 3151ef19298bSStefan Weinhuber * In the case of write requests, additional tidaws may 3152ef19298bSStefan Weinhuber * be needed when a segment crosses a track boundary. 3153f3eb5384SStefan Weinhuber */ 3154f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 3155f3eb5384SStefan Weinhuber ctidaw = 0; 3156f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 3157f3eb5384SStefan Weinhuber ++ctidaw; 3158f3eb5384SStefan Weinhuber } 3159ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 3160ef19298bSStefan Weinhuber ctidaw += (last_trk - first_trk); 3161f3eb5384SStefan Weinhuber 3162f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 3163f3eb5384SStefan Weinhuber itcw_size = itcw_calc_size(0, ctidaw, 0); 316468b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 3165f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 3166f3eb5384SStefan Weinhuber return cqr; 3167f3eb5384SStefan Weinhuber 3168f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 3169f3eb5384SStefan Weinhuber if (first_trk == last_trk) 3170f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 3171f3eb5384SStefan Weinhuber else 3172f3eb5384SStefan Weinhuber tlf = last_offs + 1; 3173f3eb5384SStefan Weinhuber tlf *= blksize; 3174f3eb5384SStefan Weinhuber 3175f3eb5384SStefan Weinhuber itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); 3176ef19298bSStefan Weinhuber if (IS_ERR(itcw)) { 3177cd10502bSJulia Lawall ret = -EINVAL; 3178cd10502bSJulia Lawall goto out_error; 3179ef19298bSStefan Weinhuber } 3180f3eb5384SStefan Weinhuber cqr->cpaddr = itcw_get_tcw(itcw); 3181f3eb5384SStefan Weinhuber if (prepare_itcw(itcw, first_trk, last_trk, 3182f3eb5384SStefan Weinhuber cmd, basedev, startdev, 3183f3eb5384SStefan Weinhuber first_offs + 1, 3184f3eb5384SStefan Weinhuber trkcount, blksize, 3185f3eb5384SStefan Weinhuber (last_rec - first_rec + 1) * blksize, 3186f3eb5384SStefan Weinhuber tlf, blk_per_trk) == -EAGAIN) { 3187f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 3188f3eb5384SStefan Weinhuber * Try again later. 3189f3eb5384SStefan Weinhuber */ 3190cd10502bSJulia Lawall ret = -EAGAIN; 3191cd10502bSJulia Lawall goto out_error; 3192f3eb5384SStefan Weinhuber } 3193d54cddb6SHeiko Carstens len_to_track_end = 0; 3194f3eb5384SStefan Weinhuber /* 3195f3eb5384SStefan Weinhuber * A tidaw can address 4k of memory, but must not cross page boundaries 3196f3eb5384SStefan Weinhuber * We can let the block layer handle this by setting 3197f3eb5384SStefan Weinhuber * blk_queue_segment_boundary to page boundaries and 3198f3eb5384SStefan Weinhuber * blk_max_segment_size to page size when setting up the request queue. 3199ef19298bSStefan Weinhuber * For write requests, a TIDAW must not cross track boundaries, because 3200ef19298bSStefan Weinhuber * we have to set the CBC flag on the last tidaw for each track. 3201f3eb5384SStefan Weinhuber */ 3202ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) { 3203ef19298bSStefan Weinhuber new_track = 1; 3204ef19298bSStefan Weinhuber recid = first_rec; 3205f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 32067988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 32077988613bSKent Overstreet seg_len = bv.bv_len; 3208ef19298bSStefan Weinhuber while (seg_len) { 3209ef19298bSStefan Weinhuber if (new_track) { 3210ef19298bSStefan Weinhuber trkid = recid; 3211ef19298bSStefan Weinhuber offs = sector_div(trkid, blk_per_trk); 3212ef19298bSStefan Weinhuber count_to_trk_end = blk_per_trk - offs; 3213ef19298bSStefan Weinhuber count = min((last_rec - recid + 1), 3214ef19298bSStefan Weinhuber (sector_t)count_to_trk_end); 3215ef19298bSStefan Weinhuber len_to_track_end = count * blksize; 3216ef19298bSStefan Weinhuber recid += count; 3217ef19298bSStefan Weinhuber new_track = 0; 3218f3eb5384SStefan Weinhuber } 3219ef19298bSStefan Weinhuber part_len = min(seg_len, len_to_track_end); 3220ef19298bSStefan Weinhuber seg_len -= part_len; 3221ef19298bSStefan Weinhuber len_to_track_end -= part_len; 3222ef19298bSStefan Weinhuber /* We need to end the tidaw at track end */ 3223ef19298bSStefan Weinhuber if (!len_to_track_end) { 3224ef19298bSStefan Weinhuber new_track = 1; 3225ef19298bSStefan Weinhuber tidaw_flags = TIDAW_FLAGS_INSERT_CBC; 3226ef19298bSStefan Weinhuber } else 3227ef19298bSStefan Weinhuber tidaw_flags = 0; 3228ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, 3229ef19298bSStefan Weinhuber dst, part_len); 3230cd10502bSJulia Lawall if (IS_ERR(last_tidaw)) { 3231cd10502bSJulia Lawall ret = -EINVAL; 3232cd10502bSJulia Lawall goto out_error; 3233cd10502bSJulia Lawall } 3234ef19298bSStefan Weinhuber dst += part_len; 3235ef19298bSStefan Weinhuber } 3236ef19298bSStefan Weinhuber } 3237ef19298bSStefan Weinhuber } else { 3238ef19298bSStefan Weinhuber rq_for_each_segment(bv, req, iter) { 32397988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 3240ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, 0x00, 32417988613bSKent Overstreet dst, bv.bv_len); 3242cd10502bSJulia Lawall if (IS_ERR(last_tidaw)) { 3243cd10502bSJulia Lawall ret = -EINVAL; 3244cd10502bSJulia Lawall goto out_error; 3245cd10502bSJulia Lawall } 3246ef19298bSStefan Weinhuber } 3247ef19298bSStefan Weinhuber } 3248ef19298bSStefan Weinhuber last_tidaw->flags |= TIDAW_FLAGS_LAST; 3249ef19298bSStefan Weinhuber last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; 3250f3eb5384SStefan Weinhuber itcw_finalize(itcw); 3251f3eb5384SStefan Weinhuber 3252f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 3253f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 3254f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3255ef19298bSStefan Weinhuber cqr->cpmode = 1; 3256f3eb5384SStefan Weinhuber cqr->startdev = startdev; 3257f3eb5384SStefan Weinhuber cqr->memdev = startdev; 3258f3eb5384SStefan Weinhuber cqr->block = block; 32597c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 3260a4d26c6aSStefan Weinhuber cqr->lpm = startdev->path_data.ppm; 32611f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 32621aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 3263f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 3264f3eb5384SStefan Weinhuber return cqr; 3265cd10502bSJulia Lawall out_error: 3266cd10502bSJulia Lawall dasd_sfree_request(cqr, startdev); 3267cd10502bSJulia Lawall return ERR_PTR(ret); 3268f3eb5384SStefan Weinhuber } 3269f3eb5384SStefan Weinhuber 3270f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 3271f3eb5384SStefan Weinhuber struct dasd_block *block, 3272f3eb5384SStefan Weinhuber struct request *req) 3273f3eb5384SStefan Weinhuber { 3274ef19298bSStefan Weinhuber int cmdrtd, cmdwtd; 3275f3eb5384SStefan Weinhuber int use_prefix; 3276ef19298bSStefan Weinhuber int fcx_multitrack; 327745b44d76SStefan Weinhuber struct dasd_eckd_private *private; 3278f3eb5384SStefan Weinhuber struct dasd_device *basedev; 3279f3eb5384SStefan Weinhuber sector_t first_rec, last_rec; 3280f3eb5384SStefan Weinhuber sector_t first_trk, last_trk; 3281f3eb5384SStefan Weinhuber unsigned int first_offs, last_offs; 3282f3eb5384SStefan Weinhuber unsigned int blk_per_trk, blksize; 3283f3eb5384SStefan Weinhuber int cdlspecial; 3284ef19298bSStefan Weinhuber unsigned int data_size; 3285f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 3286f3eb5384SStefan Weinhuber 3287f3eb5384SStefan Weinhuber basedev = block->base; 3288543691a4SSebastian Ott private = basedev->private; 3289f3eb5384SStefan Weinhuber 3290f3eb5384SStefan Weinhuber /* Calculate number of blocks/records per track. */ 3291f3eb5384SStefan Weinhuber blksize = block->bp_block; 3292f3eb5384SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 32936fca97a9SStefan Haberland if (blk_per_trk == 0) 32946fca97a9SStefan Haberland return ERR_PTR(-EINVAL); 3295f3eb5384SStefan Weinhuber /* Calculate record id of first and last block. */ 329683096ebfSTejun Heo first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; 3297f3eb5384SStefan Weinhuber first_offs = sector_div(first_trk, blk_per_trk); 3298f3eb5384SStefan Weinhuber last_rec = last_trk = 329983096ebfSTejun Heo (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 3300f3eb5384SStefan Weinhuber last_offs = sector_div(last_trk, blk_per_trk); 3301f3eb5384SStefan Weinhuber cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); 3302f3eb5384SStefan Weinhuber 3303ef19298bSStefan Weinhuber fcx_multitrack = private->features.feature[40] & 0x20; 3304ef19298bSStefan Weinhuber data_size = blk_rq_bytes(req); 330526a35f37SStefan Weinhuber if (data_size % blksize) 330626a35f37SStefan Weinhuber return ERR_PTR(-EINVAL); 3307ef19298bSStefan Weinhuber /* tpm write request add CBC data on each track boundary */ 3308ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 3309ef19298bSStefan Weinhuber data_size += (last_trk - first_trk) * 4; 3310f3eb5384SStefan Weinhuber 3311f3eb5384SStefan Weinhuber /* is read track data and write track data in command mode supported? */ 3312f3eb5384SStefan Weinhuber cmdrtd = private->features.feature[9] & 0x20; 3313f3eb5384SStefan Weinhuber cmdwtd = private->features.feature[12] & 0x40; 3314f3eb5384SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 3315f3eb5384SStefan Weinhuber 3316f3eb5384SStefan Weinhuber cqr = NULL; 3317f3eb5384SStefan Weinhuber if (cdlspecial || dasd_page_cache) { 3318f3eb5384SStefan Weinhuber /* do nothing, just fall through to the cmd mode single case */ 3319ef19298bSStefan Weinhuber } else if ((data_size <= private->fcx_max_data) 3320ef19298bSStefan Weinhuber && (fcx_multitrack || (first_trk == last_trk))) { 3321f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, 3322f3eb5384SStefan Weinhuber first_rec, last_rec, 3323f3eb5384SStefan Weinhuber first_trk, last_trk, 3324f3eb5384SStefan Weinhuber first_offs, last_offs, 3325f3eb5384SStefan Weinhuber blk_per_trk, blksize); 3326ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3327ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 3328f3eb5384SStefan Weinhuber cqr = NULL; 3329f3eb5384SStefan Weinhuber } else if (use_prefix && 3330f3eb5384SStefan Weinhuber (((rq_data_dir(req) == READ) && cmdrtd) || 3331f3eb5384SStefan Weinhuber ((rq_data_dir(req) == WRITE) && cmdwtd))) { 3332f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, 3333f3eb5384SStefan Weinhuber first_rec, last_rec, 3334f3eb5384SStefan Weinhuber first_trk, last_trk, 3335f3eb5384SStefan Weinhuber first_offs, last_offs, 3336f3eb5384SStefan Weinhuber blk_per_trk, blksize); 3337ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3338ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 3339f3eb5384SStefan Weinhuber cqr = NULL; 3340f3eb5384SStefan Weinhuber } 3341f3eb5384SStefan Weinhuber if (!cqr) 3342f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, 3343f3eb5384SStefan Weinhuber first_rec, last_rec, 3344f3eb5384SStefan Weinhuber first_trk, last_trk, 3345f3eb5384SStefan Weinhuber first_offs, last_offs, 3346f3eb5384SStefan Weinhuber blk_per_trk, blksize); 3347f3eb5384SStefan Weinhuber return cqr; 3348f3eb5384SStefan Weinhuber } 3349f3eb5384SStefan Weinhuber 3350e4dbb0f2SStefan Haberland static struct dasd_ccw_req *dasd_raw_build_cp(struct dasd_device *startdev, 3351e4dbb0f2SStefan Haberland struct dasd_block *block, 3352e4dbb0f2SStefan Haberland struct request *req) 3353e4dbb0f2SStefan Haberland { 3354e4dbb0f2SStefan Haberland unsigned long *idaws; 3355e4dbb0f2SStefan Haberland struct dasd_device *basedev; 3356e4dbb0f2SStefan Haberland struct dasd_ccw_req *cqr; 3357e4dbb0f2SStefan Haberland struct ccw1 *ccw; 3358e4dbb0f2SStefan Haberland struct req_iterator iter; 33597988613bSKent Overstreet struct bio_vec bv; 3360e4dbb0f2SStefan Haberland char *dst; 3361e4dbb0f2SStefan Haberland unsigned char cmd; 3362e4dbb0f2SStefan Haberland unsigned int trkcount; 3363e4dbb0f2SStefan Haberland unsigned int seg_len, len_to_track_end; 3364e4dbb0f2SStefan Haberland unsigned int first_offs; 3365e4dbb0f2SStefan Haberland unsigned int cidaw, cplength, datasize; 3366558b9ef0SStefan Weinhuber sector_t first_trk, last_trk, sectors; 3367558b9ef0SStefan Weinhuber sector_t start_padding_sectors, end_sector_offset, end_padding_sectors; 3368e4dbb0f2SStefan Haberland unsigned int pfx_datasize; 3369e4dbb0f2SStefan Haberland 3370e4dbb0f2SStefan Haberland /* 3371e4dbb0f2SStefan Haberland * raw track access needs to be mutiple of 64k and on 64k boundary 3372558b9ef0SStefan Weinhuber * For read requests we can fix an incorrect alignment by padding 3373558b9ef0SStefan Weinhuber * the request with dummy pages. 3374e4dbb0f2SStefan Haberland */ 3375558b9ef0SStefan Weinhuber start_padding_sectors = blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK; 3376558b9ef0SStefan Weinhuber end_sector_offset = (blk_rq_pos(req) + blk_rq_sectors(req)) % 3377558b9ef0SStefan Weinhuber DASD_RAW_SECTORS_PER_TRACK; 3378558b9ef0SStefan Weinhuber end_padding_sectors = (DASD_RAW_SECTORS_PER_TRACK - end_sector_offset) % 3379558b9ef0SStefan Weinhuber DASD_RAW_SECTORS_PER_TRACK; 3380558b9ef0SStefan Weinhuber basedev = block->base; 3381558b9ef0SStefan Weinhuber if ((start_padding_sectors || end_padding_sectors) && 3382558b9ef0SStefan Weinhuber (rq_data_dir(req) == WRITE)) { 3383558b9ef0SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 3384558b9ef0SStefan Weinhuber "raw write not track aligned (%lu,%lu) req %p", 3385558b9ef0SStefan Weinhuber start_padding_sectors, end_padding_sectors, req); 3386e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EINVAL); 3387e4dbb0f2SStefan Haberland goto out; 3388e4dbb0f2SStefan Haberland } 3389e4dbb0f2SStefan Haberland 3390e4dbb0f2SStefan Haberland first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; 3391e4dbb0f2SStefan Haberland last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / 3392e4dbb0f2SStefan Haberland DASD_RAW_SECTORS_PER_TRACK; 3393e4dbb0f2SStefan Haberland trkcount = last_trk - first_trk + 1; 3394e4dbb0f2SStefan Haberland first_offs = 0; 3395e4dbb0f2SStefan Haberland 3396e4dbb0f2SStefan Haberland if (rq_data_dir(req) == READ) 3397e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_READ_TRACK; 3398e4dbb0f2SStefan Haberland else if (rq_data_dir(req) == WRITE) 3399e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; 3400e4dbb0f2SStefan Haberland else { 3401e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EINVAL); 3402e4dbb0f2SStefan Haberland goto out; 3403e4dbb0f2SStefan Haberland } 3404e4dbb0f2SStefan Haberland 3405e4dbb0f2SStefan Haberland /* 3406e4dbb0f2SStefan Haberland * Raw track based I/O needs IDAWs for each page, 3407e4dbb0f2SStefan Haberland * and not just for 64 bit addresses. 3408e4dbb0f2SStefan Haberland */ 3409e4dbb0f2SStefan Haberland cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; 3410e4dbb0f2SStefan Haberland 3411e4dbb0f2SStefan Haberland /* 1x prefix + one read/write ccw per track */ 3412e4dbb0f2SStefan Haberland cplength = 1 + trkcount; 3413e4dbb0f2SStefan Haberland 3414e4dbb0f2SStefan Haberland /* 3415e4dbb0f2SStefan Haberland * struct PFX_eckd_data has up to 2 byte as extended parameter 3416e4dbb0f2SStefan Haberland * this is needed for write full track and has to be mentioned 341725985edcSLucas De Marchi * separately 3418e4dbb0f2SStefan Haberland * add 8 instead of 2 to keep 8 byte boundary 3419e4dbb0f2SStefan Haberland */ 3420e4dbb0f2SStefan Haberland pfx_datasize = sizeof(struct PFX_eckd_data) + 8; 3421e4dbb0f2SStefan Haberland 3422e4dbb0f2SStefan Haberland datasize = pfx_datasize + cidaw * sizeof(unsigned long long); 3423e4dbb0f2SStefan Haberland 3424e4dbb0f2SStefan Haberland /* Allocate the ccw request. */ 3425e4dbb0f2SStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 3426e4dbb0f2SStefan Haberland datasize, startdev); 3427e4dbb0f2SStefan Haberland if (IS_ERR(cqr)) 3428e4dbb0f2SStefan Haberland goto out; 3429e4dbb0f2SStefan Haberland ccw = cqr->cpaddr; 3430e4dbb0f2SStefan Haberland 3431e4dbb0f2SStefan Haberland if (prefix_LRE(ccw++, cqr->data, first_trk, last_trk, cmd, 3432e4dbb0f2SStefan Haberland basedev, startdev, 1 /* format */, first_offs + 1, 3433e4dbb0f2SStefan Haberland trkcount, 0, 0) == -EAGAIN) { 3434e4dbb0f2SStefan Haberland /* Clock not in sync and XRC is enabled. 3435e4dbb0f2SStefan Haberland * Try again later. 3436e4dbb0f2SStefan Haberland */ 3437e4dbb0f2SStefan Haberland dasd_sfree_request(cqr, startdev); 3438e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EAGAIN); 3439e4dbb0f2SStefan Haberland goto out; 3440e4dbb0f2SStefan Haberland } 3441e4dbb0f2SStefan Haberland 3442e4dbb0f2SStefan Haberland idaws = (unsigned long *)(cqr->data + pfx_datasize); 3443e4dbb0f2SStefan Haberland len_to_track_end = 0; 3444558b9ef0SStefan Weinhuber if (start_padding_sectors) { 3445558b9ef0SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 3446558b9ef0SStefan Weinhuber ccw->cmd_code = cmd; 3447558b9ef0SStefan Weinhuber /* maximum 3390 track size */ 3448558b9ef0SStefan Weinhuber ccw->count = 57326; 3449558b9ef0SStefan Weinhuber /* 64k map to one track */ 3450558b9ef0SStefan Weinhuber len_to_track_end = 65536 - start_padding_sectors * 512; 3451558b9ef0SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 3452558b9ef0SStefan Weinhuber ccw->flags |= CCW_FLAG_IDA; 3453558b9ef0SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3454558b9ef0SStefan Weinhuber ccw++; 3455558b9ef0SStefan Weinhuber for (sectors = 0; sectors < start_padding_sectors; sectors += 8) 3456558b9ef0SStefan Weinhuber idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 3457558b9ef0SStefan Weinhuber } 3458e4dbb0f2SStefan Haberland rq_for_each_segment(bv, req, iter) { 34597988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 34607988613bSKent Overstreet seg_len = bv.bv_len; 3461558b9ef0SStefan Weinhuber if (cmd == DASD_ECKD_CCW_READ_TRACK) 3462558b9ef0SStefan Weinhuber memset(dst, 0, seg_len); 3463e4dbb0f2SStefan Haberland if (!len_to_track_end) { 3464e4dbb0f2SStefan Haberland ccw[-1].flags |= CCW_FLAG_CC; 3465e4dbb0f2SStefan Haberland ccw->cmd_code = cmd; 3466e4dbb0f2SStefan Haberland /* maximum 3390 track size */ 3467e4dbb0f2SStefan Haberland ccw->count = 57326; 3468e4dbb0f2SStefan Haberland /* 64k map to one track */ 3469e4dbb0f2SStefan Haberland len_to_track_end = 65536; 3470e4dbb0f2SStefan Haberland ccw->cda = (__u32)(addr_t)idaws; 3471e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_IDA; 3472e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 3473e4dbb0f2SStefan Haberland ccw++; 3474e4dbb0f2SStefan Haberland } 3475e4dbb0f2SStefan Haberland len_to_track_end -= seg_len; 3476e4dbb0f2SStefan Haberland idaws = idal_create_words(idaws, dst, seg_len); 3477e4dbb0f2SStefan Haberland } 3478558b9ef0SStefan Weinhuber for (sectors = 0; sectors < end_padding_sectors; sectors += 8) 3479558b9ef0SStefan Weinhuber idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 3480e4dbb0f2SStefan Haberland if (blk_noretry_request(req) || 3481e4dbb0f2SStefan Haberland block->base->features & DASD_FEATURE_FAILFAST) 3482e4dbb0f2SStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3483e4dbb0f2SStefan Haberland cqr->startdev = startdev; 3484e4dbb0f2SStefan Haberland cqr->memdev = startdev; 3485e4dbb0f2SStefan Haberland cqr->block = block; 3486e4dbb0f2SStefan Haberland cqr->expires = startdev->default_expires * HZ; 3487e4dbb0f2SStefan Haberland cqr->lpm = startdev->path_data.ppm; 34881f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 34891aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 3490e4dbb0f2SStefan Haberland cqr->status = DASD_CQR_FILLED; 3491e4dbb0f2SStefan Haberland 3492e4dbb0f2SStefan Haberland if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN) 3493e4dbb0f2SStefan Haberland cqr = NULL; 3494e4dbb0f2SStefan Haberland out: 3495e4dbb0f2SStefan Haberland return cqr; 3496e4dbb0f2SStefan Haberland } 3497e4dbb0f2SStefan Haberland 3498e4dbb0f2SStefan Haberland 34991da177e4SLinus Torvalds static int 35001da177e4SLinus Torvalds dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 35011da177e4SLinus Torvalds { 35021da177e4SLinus Torvalds struct dasd_eckd_private *private; 35031da177e4SLinus Torvalds struct ccw1 *ccw; 35045705f702SNeilBrown struct req_iterator iter; 35057988613bSKent Overstreet struct bio_vec bv; 35061da177e4SLinus Torvalds char *dst, *cda; 35071da177e4SLinus Torvalds unsigned int blksize, blk_per_trk, off; 35081da177e4SLinus Torvalds sector_t recid; 35095705f702SNeilBrown int status; 35101da177e4SLinus Torvalds 35111da177e4SLinus Torvalds if (!dasd_page_cache) 35121da177e4SLinus Torvalds goto out; 3513543691a4SSebastian Ott private = cqr->block->base->private; 35148e09f215SStefan Weinhuber blksize = cqr->block->bp_block; 35151da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 351683096ebfSTejun Heo recid = blk_rq_pos(req) >> cqr->block->s2b_shift; 35171da177e4SLinus Torvalds ccw = cqr->cpaddr; 35181da177e4SLinus Torvalds /* Skip over define extent & locate record. */ 35191da177e4SLinus Torvalds ccw++; 35201da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 35211da177e4SLinus Torvalds ccw++; 35225705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 35237988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 35247988613bSKent Overstreet for (off = 0; off < bv.bv_len; off += blksize) { 35251da177e4SLinus Torvalds /* Skip locate record. */ 35261da177e4SLinus Torvalds if (private->uses_cdl && recid <= 2*blk_per_trk) 35271da177e4SLinus Torvalds ccw++; 35281da177e4SLinus Torvalds if (dst) { 35291da177e4SLinus Torvalds if (ccw->flags & CCW_FLAG_IDA) 35301da177e4SLinus Torvalds cda = *((char **)((addr_t) ccw->cda)); 35311da177e4SLinus Torvalds else 35321da177e4SLinus Torvalds cda = (char *)((addr_t) ccw->cda); 35331da177e4SLinus Torvalds if (dst != cda) { 35341da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 35357988613bSKent Overstreet memcpy(dst, cda, bv.bv_len); 35361da177e4SLinus Torvalds kmem_cache_free(dasd_page_cache, 35371da177e4SLinus Torvalds (void *)((addr_t)cda & PAGE_MASK)); 35381da177e4SLinus Torvalds } 35391da177e4SLinus Torvalds dst = NULL; 35401da177e4SLinus Torvalds } 35411da177e4SLinus Torvalds ccw++; 35421da177e4SLinus Torvalds recid++; 35431da177e4SLinus Torvalds } 35441da177e4SLinus Torvalds } 35451da177e4SLinus Torvalds out: 35461da177e4SLinus Torvalds status = cqr->status == DASD_CQR_DONE; 35478e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 35481da177e4SLinus Torvalds return status; 35491da177e4SLinus Torvalds } 35501da177e4SLinus Torvalds 35518e09f215SStefan Weinhuber /* 3552f3eb5384SStefan Weinhuber * Modify ccw/tcw in cqr so it can be started on a base device. 35538e09f215SStefan Weinhuber * 35548e09f215SStefan Weinhuber * Note that this is not enough to restart the cqr! 35558e09f215SStefan Weinhuber * Either reset cqr->startdev as well (summary unit check handling) 35568e09f215SStefan Weinhuber * or restart via separate cqr (as in ERP handling). 35578e09f215SStefan Weinhuber */ 35588e09f215SStefan Weinhuber void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 35598e09f215SStefan Weinhuber { 35608e09f215SStefan Weinhuber struct ccw1 *ccw; 35618e09f215SStefan Weinhuber struct PFX_eckd_data *pfxdata; 3562f3eb5384SStefan Weinhuber struct tcw *tcw; 3563f3eb5384SStefan Weinhuber struct tccb *tccb; 3564f3eb5384SStefan Weinhuber struct dcw *dcw; 35658e09f215SStefan Weinhuber 3566f3eb5384SStefan Weinhuber if (cqr->cpmode == 1) { 3567f3eb5384SStefan Weinhuber tcw = cqr->cpaddr; 3568f3eb5384SStefan Weinhuber tccb = tcw_get_tccb(tcw); 3569f3eb5384SStefan Weinhuber dcw = (struct dcw *)&tccb->tca[0]; 3570f3eb5384SStefan Weinhuber pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; 3571f3eb5384SStefan Weinhuber pfxdata->validity.verify_base = 0; 3572f3eb5384SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 3573f3eb5384SStefan Weinhuber } else { 35748e09f215SStefan Weinhuber ccw = cqr->cpaddr; 35758e09f215SStefan Weinhuber pfxdata = cqr->data; 35768e09f215SStefan Weinhuber if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 35778e09f215SStefan Weinhuber pfxdata->validity.verify_base = 0; 35788e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 35798e09f215SStefan Weinhuber } 35808e09f215SStefan Weinhuber } 3581f3eb5384SStefan Weinhuber } 35828e09f215SStefan Weinhuber 35838e09f215SStefan Weinhuber #define DASD_ECKD_CHANQ_MAX_SIZE 4 35848e09f215SStefan Weinhuber 35858e09f215SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 35868e09f215SStefan Weinhuber struct dasd_block *block, 35878e09f215SStefan Weinhuber struct request *req) 35888e09f215SStefan Weinhuber { 35898e09f215SStefan Weinhuber struct dasd_eckd_private *private; 35908e09f215SStefan Weinhuber struct dasd_device *startdev; 35918e09f215SStefan Weinhuber unsigned long flags; 35928e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 35938e09f215SStefan Weinhuber 35948e09f215SStefan Weinhuber startdev = dasd_alias_get_start_dev(base); 35958e09f215SStefan Weinhuber if (!startdev) 35968e09f215SStefan Weinhuber startdev = base; 3597543691a4SSebastian Ott private = startdev->private; 35988e09f215SStefan Weinhuber if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 35998e09f215SStefan Weinhuber return ERR_PTR(-EBUSY); 36008e09f215SStefan Weinhuber 36018e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 36028e09f215SStefan Weinhuber private->count++; 3603e4dbb0f2SStefan Haberland if ((base->features & DASD_FEATURE_USERAW)) 3604e4dbb0f2SStefan Haberland cqr = dasd_raw_build_cp(startdev, block, req); 3605e4dbb0f2SStefan Haberland else 36068e09f215SStefan Weinhuber cqr = dasd_eckd_build_cp(startdev, block, req); 36078e09f215SStefan Weinhuber if (IS_ERR(cqr)) 36088e09f215SStefan Weinhuber private->count--; 36098e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 36108e09f215SStefan Weinhuber return cqr; 36118e09f215SStefan Weinhuber } 36128e09f215SStefan Weinhuber 36138e09f215SStefan Weinhuber static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 36148e09f215SStefan Weinhuber struct request *req) 36158e09f215SStefan Weinhuber { 36168e09f215SStefan Weinhuber struct dasd_eckd_private *private; 36178e09f215SStefan Weinhuber unsigned long flags; 36188e09f215SStefan Weinhuber 36198e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 3620543691a4SSebastian Ott private = cqr->memdev->private; 36218e09f215SStefan Weinhuber private->count--; 36228e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 36238e09f215SStefan Weinhuber return dasd_eckd_free_cp(cqr, req); 36248e09f215SStefan Weinhuber } 36258e09f215SStefan Weinhuber 36261da177e4SLinus Torvalds static int 36271da177e4SLinus Torvalds dasd_eckd_fill_info(struct dasd_device * device, 36281da177e4SLinus Torvalds struct dasd_information2_t * info) 36291da177e4SLinus Torvalds { 3630543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 36311da177e4SLinus Torvalds 36321da177e4SLinus Torvalds info->label_block = 2; 36331da177e4SLinus Torvalds info->FBA_layout = private->uses_cdl ? 0 : 1; 36341da177e4SLinus Torvalds info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 3635543691a4SSebastian Ott info->characteristics_size = sizeof(private->rdc_data); 36361da177e4SLinus Torvalds memcpy(info->characteristics, &private->rdc_data, 3637543691a4SSebastian Ott sizeof(private->rdc_data)); 36384abb08c2SStefan Weinhuber info->confdata_size = min((unsigned long)private->conf_len, 36394abb08c2SStefan Weinhuber sizeof(info->configuration_data)); 36404abb08c2SStefan Weinhuber memcpy(info->configuration_data, private->conf_data, 36414abb08c2SStefan Weinhuber info->confdata_size); 36421da177e4SLinus Torvalds return 0; 36431da177e4SLinus Torvalds } 36441da177e4SLinus Torvalds 36451da177e4SLinus Torvalds /* 36461da177e4SLinus Torvalds * SECTION: ioctl functions for eckd devices. 36471da177e4SLinus Torvalds */ 36481da177e4SLinus Torvalds 36491da177e4SLinus Torvalds /* 36501da177e4SLinus Torvalds * Release device ioctl. 36511da177e4SLinus Torvalds * Buils a channel programm to releases a prior reserved 36521da177e4SLinus Torvalds * (see dasd_eckd_reserve) device. 36531da177e4SLinus Torvalds */ 36541da177e4SLinus Torvalds static int 36551107ccfbSChristoph Hellwig dasd_eckd_release(struct dasd_device *device) 36561da177e4SLinus Torvalds { 36571da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 36581da177e4SLinus Torvalds int rc; 3659f3eb5384SStefan Weinhuber struct ccw1 *ccw; 3660f932bceaSStefan Weinhuber int useglobal; 36611da177e4SLinus Torvalds 36621da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 36631da177e4SLinus Torvalds return -EACCES; 36641da177e4SLinus Torvalds 3665f932bceaSStefan Weinhuber useglobal = 0; 366668b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 36671da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3668f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3669f932bceaSStefan Weinhuber useglobal = 1; 3670f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3671f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3672f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3673f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3674f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3675f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3676f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 36771da177e4SLinus Torvalds } 3678f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 3679f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RELEASE; 3680f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3681f3eb5384SStefan Weinhuber ccw->count = 32; 3682f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 36838e09f215SStefan Weinhuber cqr->startdev = device; 36848e09f215SStefan Weinhuber cqr->memdev = device; 36851da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 36861c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3687336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 36881da177e4SLinus Torvalds cqr->expires = 2 * HZ; 36891aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 36901da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 36911da177e4SLinus Torvalds 36921da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 36935a27e60dSStefan Weinhuber if (!rc) 36945a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 36951da177e4SLinus Torvalds 3696f932bceaSStefan Weinhuber if (useglobal) 3697f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3698f932bceaSStefan Weinhuber else 36998e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 37001da177e4SLinus Torvalds return rc; 37011da177e4SLinus Torvalds } 37021da177e4SLinus Torvalds 37031da177e4SLinus Torvalds /* 37041da177e4SLinus Torvalds * Reserve device ioctl. 37051da177e4SLinus Torvalds * Options are set to 'synchronous wait for interrupt' and 37061da177e4SLinus Torvalds * 'timeout the request'. This leads to a terminate IO if 37071da177e4SLinus Torvalds * the interrupt is outstanding for a certain time. 37081da177e4SLinus Torvalds */ 37091da177e4SLinus Torvalds static int 37101107ccfbSChristoph Hellwig dasd_eckd_reserve(struct dasd_device *device) 37111da177e4SLinus Torvalds { 37121da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 37131da177e4SLinus Torvalds int rc; 3714f3eb5384SStefan Weinhuber struct ccw1 *ccw; 3715f932bceaSStefan Weinhuber int useglobal; 37161da177e4SLinus Torvalds 37171da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 37181da177e4SLinus Torvalds return -EACCES; 37191da177e4SLinus Torvalds 3720f932bceaSStefan Weinhuber useglobal = 0; 372168b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 37221da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3723f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3724f932bceaSStefan Weinhuber useglobal = 1; 3725f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3726f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3727f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3728f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3729f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3730f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3731f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 37321da177e4SLinus Torvalds } 3733f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 3734f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RESERVE; 3735f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3736f3eb5384SStefan Weinhuber ccw->count = 32; 3737f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 37388e09f215SStefan Weinhuber cqr->startdev = device; 37398e09f215SStefan Weinhuber cqr->memdev = device; 37401da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 37411c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3742336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 37431da177e4SLinus Torvalds cqr->expires = 2 * HZ; 37441aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 37451da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 37461da177e4SLinus Torvalds 37471da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 37485a27e60dSStefan Weinhuber if (!rc) 37495a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 37501da177e4SLinus Torvalds 3751f932bceaSStefan Weinhuber if (useglobal) 3752f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3753f932bceaSStefan Weinhuber else 37548e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 37551da177e4SLinus Torvalds return rc; 37561da177e4SLinus Torvalds } 37571da177e4SLinus Torvalds 37581da177e4SLinus Torvalds /* 37591da177e4SLinus Torvalds * Steal lock ioctl - unconditional reserve device. 37601da177e4SLinus Torvalds * Buils a channel programm to break a device's reservation. 37611da177e4SLinus Torvalds * (unconditional reserve) 37621da177e4SLinus Torvalds */ 37631da177e4SLinus Torvalds static int 37641107ccfbSChristoph Hellwig dasd_eckd_steal_lock(struct dasd_device *device) 37651da177e4SLinus Torvalds { 37661da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 37671da177e4SLinus Torvalds int rc; 3768f3eb5384SStefan Weinhuber struct ccw1 *ccw; 3769f932bceaSStefan Weinhuber int useglobal; 37701da177e4SLinus Torvalds 37711da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 37721da177e4SLinus Torvalds return -EACCES; 37731da177e4SLinus Torvalds 3774f932bceaSStefan Weinhuber useglobal = 0; 377568b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 37761da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3777f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3778f932bceaSStefan Weinhuber useglobal = 1; 3779f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3780f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3781f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3782f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3783f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3784f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3785f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 37861da177e4SLinus Torvalds } 3787f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 3788f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SLCK; 3789f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3790f3eb5384SStefan Weinhuber ccw->count = 32; 3791f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 37928e09f215SStefan Weinhuber cqr->startdev = device; 37938e09f215SStefan Weinhuber cqr->memdev = device; 37941da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 37951c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3796336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 37971da177e4SLinus Torvalds cqr->expires = 2 * HZ; 37981aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 37991da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 38001da177e4SLinus Torvalds 38011da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 38025a27e60dSStefan Weinhuber if (!rc) 38035a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 38041da177e4SLinus Torvalds 3805f932bceaSStefan Weinhuber if (useglobal) 3806f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3807f932bceaSStefan Weinhuber else 38088e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 38091da177e4SLinus Torvalds return rc; 38101da177e4SLinus Torvalds } 38111da177e4SLinus Torvalds 38121da177e4SLinus Torvalds /* 3813196339f1SStefan Weinhuber * SNID - Sense Path Group ID 3814196339f1SStefan Weinhuber * This ioctl may be used in situations where I/O is stalled due to 3815196339f1SStefan Weinhuber * a reserve, so if the normal dasd_smalloc_request fails, we use the 3816196339f1SStefan Weinhuber * preallocated dasd_reserve_req. 3817196339f1SStefan Weinhuber */ 3818196339f1SStefan Weinhuber static int dasd_eckd_snid(struct dasd_device *device, 3819196339f1SStefan Weinhuber void __user *argp) 3820196339f1SStefan Weinhuber { 3821196339f1SStefan Weinhuber struct dasd_ccw_req *cqr; 3822196339f1SStefan Weinhuber int rc; 3823196339f1SStefan Weinhuber struct ccw1 *ccw; 3824196339f1SStefan Weinhuber int useglobal; 3825196339f1SStefan Weinhuber struct dasd_snid_ioctl_data usrparm; 3826196339f1SStefan Weinhuber 3827196339f1SStefan Weinhuber if (!capable(CAP_SYS_ADMIN)) 3828196339f1SStefan Weinhuber return -EACCES; 3829196339f1SStefan Weinhuber 3830196339f1SStefan Weinhuber if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 3831196339f1SStefan Weinhuber return -EFAULT; 3832196339f1SStefan Weinhuber 3833196339f1SStefan Weinhuber useglobal = 0; 3834196339f1SStefan Weinhuber cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 3835196339f1SStefan Weinhuber sizeof(struct dasd_snid_data), device); 3836196339f1SStefan Weinhuber if (IS_ERR(cqr)) { 3837196339f1SStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3838196339f1SStefan Weinhuber useglobal = 1; 3839196339f1SStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3840196339f1SStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3841196339f1SStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3842196339f1SStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3843196339f1SStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3844196339f1SStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3845196339f1SStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 3846196339f1SStefan Weinhuber } 3847196339f1SStefan Weinhuber ccw = cqr->cpaddr; 3848196339f1SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SNID; 3849196339f1SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3850196339f1SStefan Weinhuber ccw->count = 12; 3851196339f1SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 3852196339f1SStefan Weinhuber cqr->startdev = device; 3853196339f1SStefan Weinhuber cqr->memdev = device; 3854196339f1SStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3855196339f1SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 38565a27e60dSStefan Weinhuber set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 3857196339f1SStefan Weinhuber cqr->retries = 5; 3858196339f1SStefan Weinhuber cqr->expires = 10 * HZ; 38591aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 3860196339f1SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 3861196339f1SStefan Weinhuber cqr->lpm = usrparm.path_mask; 3862196339f1SStefan Weinhuber 3863196339f1SStefan Weinhuber rc = dasd_sleep_on_immediatly(cqr); 3864196339f1SStefan Weinhuber /* verify that I/O processing didn't modify the path mask */ 3865196339f1SStefan Weinhuber if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) 3866196339f1SStefan Weinhuber rc = -EIO; 3867196339f1SStefan Weinhuber if (!rc) { 3868196339f1SStefan Weinhuber usrparm.data = *((struct dasd_snid_data *)cqr->data); 3869196339f1SStefan Weinhuber if (copy_to_user(argp, &usrparm, sizeof(usrparm))) 3870196339f1SStefan Weinhuber rc = -EFAULT; 3871196339f1SStefan Weinhuber } 3872196339f1SStefan Weinhuber 3873196339f1SStefan Weinhuber if (useglobal) 3874196339f1SStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3875196339f1SStefan Weinhuber else 3876196339f1SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 3877196339f1SStefan Weinhuber return rc; 3878196339f1SStefan Weinhuber } 3879196339f1SStefan Weinhuber 3880196339f1SStefan Weinhuber /* 38811da177e4SLinus Torvalds * Read performance statistics 38821da177e4SLinus Torvalds */ 38831da177e4SLinus Torvalds static int 38841107ccfbSChristoph Hellwig dasd_eckd_performance(struct dasd_device *device, void __user *argp) 38851da177e4SLinus Torvalds { 38861da177e4SLinus Torvalds struct dasd_psf_prssd_data *prssdp; 38871da177e4SLinus Torvalds struct dasd_rssd_perf_stats_t *stats; 38881da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 38891da177e4SLinus Torvalds struct ccw1 *ccw; 38901da177e4SLinus Torvalds int rc; 38911da177e4SLinus Torvalds 389268b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 38931da177e4SLinus Torvalds (sizeof(struct dasd_psf_prssd_data) + 38941da177e4SLinus Torvalds sizeof(struct dasd_rssd_perf_stats_t)), 38951da177e4SLinus Torvalds device); 38961da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3897fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 38981da177e4SLinus Torvalds "Could not allocate initialization request"); 38991da177e4SLinus Torvalds return PTR_ERR(cqr); 39001da177e4SLinus Torvalds } 39018e09f215SStefan Weinhuber cqr->startdev = device; 39028e09f215SStefan Weinhuber cqr->memdev = device; 39031da177e4SLinus Torvalds cqr->retries = 0; 3904eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 39051da177e4SLinus Torvalds cqr->expires = 10 * HZ; 39061da177e4SLinus Torvalds 39071da177e4SLinus Torvalds /* Prepare for Read Subsystem Data */ 39081da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 39091da177e4SLinus Torvalds memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 39101da177e4SLinus Torvalds prssdp->order = PSF_ORDER_PRSSD; 39115d67d164SJoe Perches prssdp->suborder = 0x01; /* Performance Statistics */ 39121da177e4SLinus Torvalds prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 39131da177e4SLinus Torvalds 39141da177e4SLinus Torvalds ccw = cqr->cpaddr; 39151da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_PSF; 39161da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_psf_prssd_data); 39171da177e4SLinus Torvalds ccw->flags |= CCW_FLAG_CC; 39181da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) prssdp; 39191da177e4SLinus Torvalds 39201da177e4SLinus Torvalds /* Read Subsystem Data - Performance Statistics */ 39211da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 39221da177e4SLinus Torvalds memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 39231da177e4SLinus Torvalds 39241da177e4SLinus Torvalds ccw++; 39251da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_RSSD; 39261da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 39271da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) stats; 39281da177e4SLinus Torvalds 39291aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 39301da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 39311da177e4SLinus Torvalds rc = dasd_sleep_on(cqr); 39321da177e4SLinus Torvalds if (rc == 0) { 39331da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 39341da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 39351107ccfbSChristoph Hellwig if (copy_to_user(argp, stats, 39361107ccfbSChristoph Hellwig sizeof(struct dasd_rssd_perf_stats_t))) 39371107ccfbSChristoph Hellwig rc = -EFAULT; 39381da177e4SLinus Torvalds } 39398e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 39401da177e4SLinus Torvalds return rc; 39411da177e4SLinus Torvalds } 39421da177e4SLinus Torvalds 39431da177e4SLinus Torvalds /* 39441da177e4SLinus Torvalds * Get attributes (cache operations) 39451da177e4SLinus Torvalds * Returnes the cache attributes used in Define Extend (DE). 39461da177e4SLinus Torvalds */ 39471da177e4SLinus Torvalds static int 39481107ccfbSChristoph Hellwig dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 39491da177e4SLinus Torvalds { 3950543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 39511107ccfbSChristoph Hellwig struct attrib_data_t attrib = private->attrib; 39521da177e4SLinus Torvalds int rc; 39531da177e4SLinus Torvalds 39541da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 39551da177e4SLinus Torvalds return -EACCES; 39561107ccfbSChristoph Hellwig if (!argp) 39571da177e4SLinus Torvalds return -EINVAL; 39581da177e4SLinus Torvalds 39591107ccfbSChristoph Hellwig rc = 0; 39601107ccfbSChristoph Hellwig if (copy_to_user(argp, (long *) &attrib, 39611107ccfbSChristoph Hellwig sizeof(struct attrib_data_t))) 39621107ccfbSChristoph Hellwig rc = -EFAULT; 39631da177e4SLinus Torvalds 39641da177e4SLinus Torvalds return rc; 39651da177e4SLinus Torvalds } 39661da177e4SLinus Torvalds 39671da177e4SLinus Torvalds /* 39681da177e4SLinus Torvalds * Set attributes (cache operations) 39691da177e4SLinus Torvalds * Stores the attributes for cache operation to be used in Define Extend (DE). 39701da177e4SLinus Torvalds */ 39711da177e4SLinus Torvalds static int 39721107ccfbSChristoph Hellwig dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 39731da177e4SLinus Torvalds { 3974543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 39751da177e4SLinus Torvalds struct attrib_data_t attrib; 39761da177e4SLinus Torvalds 39771da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 39781da177e4SLinus Torvalds return -EACCES; 39791107ccfbSChristoph Hellwig if (!argp) 39801da177e4SLinus Torvalds return -EINVAL; 39811da177e4SLinus Torvalds 39821107ccfbSChristoph Hellwig if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 39831da177e4SLinus Torvalds return -EFAULT; 39841da177e4SLinus Torvalds private->attrib = attrib; 39851da177e4SLinus Torvalds 3986fc19f381SStefan Haberland dev_info(&device->cdev->dev, 3987fc19f381SStefan Haberland "The DASD cache mode was set to %x (%i cylinder prestage)\n", 39881da177e4SLinus Torvalds private->attrib.operation, private->attrib.nr_cyl); 39891da177e4SLinus Torvalds return 0; 39901da177e4SLinus Torvalds } 39911da177e4SLinus Torvalds 3992ab1d848fSNigel Hislop /* 3993ab1d848fSNigel Hislop * Issue syscall I/O to EMC Symmetrix array. 3994ab1d848fSNigel Hislop * CCWs are PSF and RSSD 3995ab1d848fSNigel Hislop */ 3996ab1d848fSNigel Hislop static int dasd_symm_io(struct dasd_device *device, void __user *argp) 3997ab1d848fSNigel Hislop { 3998ab1d848fSNigel Hislop struct dasd_symmio_parms usrparm; 3999ab1d848fSNigel Hislop char *psf_data, *rssd_result; 4000ab1d848fSNigel Hislop struct dasd_ccw_req *cqr; 4001ab1d848fSNigel Hislop struct ccw1 *ccw; 400252898025SNigel Hislop char psf0, psf1; 4003ab1d848fSNigel Hislop int rc; 4004ab1d848fSNigel Hislop 400552898025SNigel Hislop if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) 400652898025SNigel Hislop return -EACCES; 400752898025SNigel Hislop psf0 = psf1 = 0; 400852898025SNigel Hislop 4009ab1d848fSNigel Hislop /* Copy parms from caller */ 4010ab1d848fSNigel Hislop rc = -EFAULT; 4011ab1d848fSNigel Hislop if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 4012ab1d848fSNigel Hislop goto out; 401392d62891SHeiko Carstens if (is_compat_task()) { 4014ab1d848fSNigel Hislop /* Make sure pointers are sane even on 31 bit. */ 4015ab1d848fSNigel Hislop rc = -EINVAL; 4016f8b06859SHeiko Carstens if ((usrparm.psf_data >> 32) != 0) 4017ab1d848fSNigel Hislop goto out; 4018f8b06859SHeiko Carstens if ((usrparm.rssd_result >> 32) != 0) 4019f8b06859SHeiko Carstens goto out; 4020f8b06859SHeiko Carstens usrparm.psf_data &= 0x7fffffffULL; 4021f8b06859SHeiko Carstens usrparm.rssd_result &= 0x7fffffffULL; 4022ab1d848fSNigel Hislop } 4023ab1d848fSNigel Hislop /* alloc I/O data area */ 4024ab1d848fSNigel Hislop psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 4025ab1d848fSNigel Hislop rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 4026ab1d848fSNigel Hislop if (!psf_data || !rssd_result) { 4027ab1d848fSNigel Hislop rc = -ENOMEM; 4028ab1d848fSNigel Hislop goto out_free; 4029ab1d848fSNigel Hislop } 4030ab1d848fSNigel Hislop 4031ab1d848fSNigel Hislop /* get syscall header from user space */ 4032ab1d848fSNigel Hislop rc = -EFAULT; 4033ab1d848fSNigel Hislop if (copy_from_user(psf_data, 4034ab1d848fSNigel Hislop (void __user *)(unsigned long) usrparm.psf_data, 4035ab1d848fSNigel Hislop usrparm.psf_data_len)) 4036ab1d848fSNigel Hislop goto out_free; 403752898025SNigel Hislop psf0 = psf_data[0]; 403852898025SNigel Hislop psf1 = psf_data[1]; 4039ab1d848fSNigel Hislop 4040ab1d848fSNigel Hislop /* setup CCWs for PSF + RSSD */ 404168b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device); 4042ab1d848fSNigel Hislop if (IS_ERR(cqr)) { 4043fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 4044ab1d848fSNigel Hislop "Could not allocate initialization request"); 4045ab1d848fSNigel Hislop rc = PTR_ERR(cqr); 4046ab1d848fSNigel Hislop goto out_free; 4047ab1d848fSNigel Hislop } 4048ab1d848fSNigel Hislop 4049ab1d848fSNigel Hislop cqr->startdev = device; 4050ab1d848fSNigel Hislop cqr->memdev = device; 4051ab1d848fSNigel Hislop cqr->retries = 3; 4052ab1d848fSNigel Hislop cqr->expires = 10 * HZ; 40531aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 4054ab1d848fSNigel Hislop cqr->status = DASD_CQR_FILLED; 4055ab1d848fSNigel Hislop 4056ab1d848fSNigel Hislop /* Build the ccws */ 4057ab1d848fSNigel Hislop ccw = cqr->cpaddr; 4058ab1d848fSNigel Hislop 4059ab1d848fSNigel Hislop /* PSF ccw */ 4060ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_PSF; 4061ab1d848fSNigel Hislop ccw->count = usrparm.psf_data_len; 4062ab1d848fSNigel Hislop ccw->flags |= CCW_FLAG_CC; 4063ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) psf_data; 4064ab1d848fSNigel Hislop 4065ab1d848fSNigel Hislop ccw++; 4066ab1d848fSNigel Hislop 4067ab1d848fSNigel Hislop /* RSSD ccw */ 4068ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_RSSD; 4069ab1d848fSNigel Hislop ccw->count = usrparm.rssd_result_len; 4070ab1d848fSNigel Hislop ccw->flags = CCW_FLAG_SLI ; 4071ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) rssd_result; 4072ab1d848fSNigel Hislop 4073ab1d848fSNigel Hislop rc = dasd_sleep_on(cqr); 4074ab1d848fSNigel Hislop if (rc) 4075ab1d848fSNigel Hislop goto out_sfree; 4076ab1d848fSNigel Hislop 4077ab1d848fSNigel Hislop rc = -EFAULT; 4078ab1d848fSNigel Hislop if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 4079ab1d848fSNigel Hislop rssd_result, usrparm.rssd_result_len)) 4080ab1d848fSNigel Hislop goto out_sfree; 4081ab1d848fSNigel Hislop rc = 0; 4082ab1d848fSNigel Hislop 4083ab1d848fSNigel Hislop out_sfree: 4084ab1d848fSNigel Hislop dasd_sfree_request(cqr, cqr->memdev); 4085ab1d848fSNigel Hislop out_free: 4086ab1d848fSNigel Hislop kfree(rssd_result); 4087ab1d848fSNigel Hislop kfree(psf_data); 4088ab1d848fSNigel Hislop out: 408952898025SNigel Hislop DBF_DEV_EVENT(DBF_WARNING, device, 409052898025SNigel Hislop "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", 409152898025SNigel Hislop (int) psf0, (int) psf1, rc); 4092ab1d848fSNigel Hislop return rc; 4093ab1d848fSNigel Hislop } 4094ab1d848fSNigel Hislop 40951107ccfbSChristoph Hellwig static int 40968e09f215SStefan Weinhuber dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 40971107ccfbSChristoph Hellwig { 40988e09f215SStefan Weinhuber struct dasd_device *device = block->base; 40998e09f215SStefan Weinhuber 41001107ccfbSChristoph Hellwig switch (cmd) { 41011107ccfbSChristoph Hellwig case BIODASDGATTR: 41021107ccfbSChristoph Hellwig return dasd_eckd_get_attrib(device, argp); 41031107ccfbSChristoph Hellwig case BIODASDSATTR: 41041107ccfbSChristoph Hellwig return dasd_eckd_set_attrib(device, argp); 41051107ccfbSChristoph Hellwig case BIODASDPSRD: 41061107ccfbSChristoph Hellwig return dasd_eckd_performance(device, argp); 41071107ccfbSChristoph Hellwig case BIODASDRLSE: 41081107ccfbSChristoph Hellwig return dasd_eckd_release(device); 41091107ccfbSChristoph Hellwig case BIODASDRSRV: 41101107ccfbSChristoph Hellwig return dasd_eckd_reserve(device); 41111107ccfbSChristoph Hellwig case BIODASDSLCK: 41121107ccfbSChristoph Hellwig return dasd_eckd_steal_lock(device); 4113196339f1SStefan Weinhuber case BIODASDSNID: 4114196339f1SStefan Weinhuber return dasd_eckd_snid(device, argp); 4115ab1d848fSNigel Hislop case BIODASDSYMMIO: 4116ab1d848fSNigel Hislop return dasd_symm_io(device, argp); 41171107ccfbSChristoph Hellwig default: 41186b79d14eSHeiko Carstens return -ENOTTY; 41191107ccfbSChristoph Hellwig } 41201107ccfbSChristoph Hellwig } 41211107ccfbSChristoph Hellwig 41221da177e4SLinus Torvalds /* 4123445b5b49SHorst Hummel * Dump the range of CCWs into 'page' buffer 4124445b5b49SHorst Hummel * and return number of printed chars. 4125445b5b49SHorst Hummel */ 41264d284cacSHeiko Carstens static int 4127445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 4128445b5b49SHorst Hummel { 4129445b5b49SHorst Hummel int len, count; 4130445b5b49SHorst Hummel char *datap; 4131445b5b49SHorst Hummel 4132445b5b49SHorst Hummel len = 0; 4133445b5b49SHorst Hummel while (from <= to) { 4134773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4135445b5b49SHorst Hummel " CCW %p: %08X %08X DAT:", 4136445b5b49SHorst Hummel from, ((int *) from)[0], ((int *) from)[1]); 4137445b5b49SHorst Hummel 4138445b5b49SHorst Hummel /* get pointer to data (consider IDALs) */ 4139445b5b49SHorst Hummel if (from->flags & CCW_FLAG_IDA) 4140445b5b49SHorst Hummel datap = (char *) *((addr_t *) (addr_t) from->cda); 4141445b5b49SHorst Hummel else 4142445b5b49SHorst Hummel datap = (char *) ((addr_t) from->cda); 4143445b5b49SHorst Hummel 4144445b5b49SHorst Hummel /* dump data (max 32 bytes) */ 4145445b5b49SHorst Hummel for (count = 0; count < from->count && count < 32; count++) { 4146445b5b49SHorst Hummel if (count % 8 == 0) len += sprintf(page + len, " "); 4147445b5b49SHorst Hummel if (count % 4 == 0) len += sprintf(page + len, " "); 4148445b5b49SHorst Hummel len += sprintf(page + len, "%02x", datap[count]); 4149445b5b49SHorst Hummel } 4150445b5b49SHorst Hummel len += sprintf(page + len, "\n"); 4151445b5b49SHorst Hummel from++; 4152445b5b49SHorst Hummel } 4153445b5b49SHorst Hummel return len; 4154445b5b49SHorst Hummel } 4155445b5b49SHorst Hummel 4156fc19f381SStefan Haberland static void 4157aeec92caSStefan Haberland dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 4158aeec92caSStefan Haberland char *reason) 4159fc19f381SStefan Haberland { 4160fc19f381SStefan Haberland u64 *sense; 4161a5a0061fSStefan Weinhuber u64 *stat; 4162fc19f381SStefan Haberland 4163aeec92caSStefan Haberland sense = (u64 *) dasd_get_sense(irb); 4164a5a0061fSStefan Weinhuber stat = (u64 *) &irb->scsw; 4165fc19f381SStefan Haberland if (sense) { 4166a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " 4167a5a0061fSStefan Weinhuber "%016llx %016llx %016llx %016llx", 4168a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 4169ed3640b2SStefan Haberland sense[0], sense[1], sense[2], sense[3]); 4170fc19f381SStefan Haberland } else { 4171a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", 4172a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 4173a5a0061fSStefan Weinhuber "NO VALID SENSE"); 4174fc19f381SStefan Haberland } 4175fc19f381SStefan Haberland } 4176fc19f381SStefan Haberland 4177445b5b49SHorst Hummel /* 41781da177e4SLinus Torvalds * Print sense data and related channel program. 41791da177e4SLinus Torvalds * Parts are printed because printk buffer is only 1024 bytes. 41801da177e4SLinus Torvalds */ 4181f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 41828e09f215SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 41831da177e4SLinus Torvalds { 41841da177e4SLinus Torvalds char *page; 4185445b5b49SHorst Hummel struct ccw1 *first, *last, *fail, *from, *to; 4186445b5b49SHorst Hummel int len, sl, sct; 41871da177e4SLinus Torvalds 41881da177e4SLinus Torvalds page = (char *) get_zeroed_page(GFP_ATOMIC); 41891da177e4SLinus Torvalds if (page == NULL) { 4190fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 4191fc19f381SStefan Haberland "No memory to dump sense data\n"); 41921da177e4SLinus Torvalds return; 41931da177e4SLinus Torvalds } 4194445b5b49SHorst Hummel /* dump the sense data */ 4195773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 41961da177e4SLinus Torvalds " I/O status report for device %s:\n", 41972a0217d5SKay Sievers dev_name(&device->cdev->dev)); 4198773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4199a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 4200a5a0061fSStefan Weinhuber "CS:%02X RC:%d\n", 4201a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 4202a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 4203a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 4204a5a0061fSStefan Weinhuber req ? req->intrc : 0); 4205773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 42061da177e4SLinus Torvalds " device %s: Failing CCW: %p\n", 42072a0217d5SKay Sievers dev_name(&device->cdev->dev), 420823d805b6SPeter Oberparleiter (void *) (addr_t) irb->scsw.cmd.cpa); 42091da177e4SLinus Torvalds if (irb->esw.esw0.erw.cons) { 42101da177e4SLinus Torvalds for (sl = 0; sl < 4; sl++) { 4211773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 42121da177e4SLinus Torvalds " Sense(hex) %2d-%2d:", 42131da177e4SLinus Torvalds (8 * sl), ((8 * sl) + 7)); 42141da177e4SLinus Torvalds 42151da177e4SLinus Torvalds for (sct = 0; sct < 8; sct++) { 42161da177e4SLinus Torvalds len += sprintf(page + len, " %02x", 42171da177e4SLinus Torvalds irb->ecw[8 * sl + sct]); 42181da177e4SLinus Torvalds } 42191da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 42201da177e4SLinus Torvalds } 42211da177e4SLinus Torvalds 42221da177e4SLinus Torvalds if (irb->ecw[27] & DASD_SENSE_BIT_0) { 42231da177e4SLinus Torvalds /* 24 Byte Sense Data */ 4224773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 42251da177e4SLinus Torvalds " 24 Byte: %x MSG %x, " 42261da177e4SLinus Torvalds "%s MSGb to SYSOP\n", 42271da177e4SLinus Torvalds irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 42281da177e4SLinus Torvalds irb->ecw[1] & 0x10 ? "" : "no"); 42291da177e4SLinus Torvalds } else { 42301da177e4SLinus Torvalds /* 32 Byte Sense Data */ 4231773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 42321da177e4SLinus Torvalds " 32 Byte: Format: %x " 42331da177e4SLinus Torvalds "Exception class %x\n", 42341da177e4SLinus Torvalds irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 42351da177e4SLinus Torvalds } 42361da177e4SLinus Torvalds } else { 4237773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 42381da177e4SLinus Torvalds " SORRY - NO VALID SENSE AVAILABLE\n"); 42391da177e4SLinus Torvalds } 4240773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 42411da177e4SLinus Torvalds 42428e09f215SStefan Weinhuber if (req) { 42438e09f215SStefan Weinhuber /* req == NULL for unsolicited interrupts */ 4244445b5b49SHorst Hummel /* dump the Channel Program (max 140 Bytes per line) */ 4245445b5b49SHorst Hummel /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 4246445b5b49SHorst Hummel first = req->cpaddr; 4247445b5b49SHorst Hummel for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 4248445b5b49SHorst Hummel to = min(first + 6, last); 4249773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 42501da177e4SLinus Torvalds " Related CP in req: %p\n", req); 4251445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(first, to, page + len); 4252773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 42531da177e4SLinus Torvalds 4254445b5b49SHorst Hummel /* print failing CCW area (maximum 4) */ 4255445b5b49SHorst Hummel /* scsw->cda is either valid or zero */ 42561da177e4SLinus Torvalds len = 0; 4257445b5b49SHorst Hummel from = ++to; 425823d805b6SPeter Oberparleiter fail = (struct ccw1 *)(addr_t) 425923d805b6SPeter Oberparleiter irb->scsw.cmd.cpa; /* failing CCW */ 4260445b5b49SHorst Hummel if (from < fail - 2) { 4261445b5b49SHorst Hummel from = fail - 2; /* there is a gap - print header */ 4262773bab4aSSebastian Ott len += sprintf(page, PRINTK_HEADER "......\n"); 42631da177e4SLinus Torvalds } 4264445b5b49SHorst Hummel to = min(fail + 1, last); 4265445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, to, page + len); 42661da177e4SLinus Torvalds 4267445b5b49SHorst Hummel /* print last CCWs (maximum 2) */ 4268445b5b49SHorst Hummel from = max(from, ++to); 4269445b5b49SHorst Hummel if (from < last - 1) { 4270445b5b49SHorst Hummel from = last - 1; /* there is a gap - print header */ 4271773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER "......\n"); 42721da177e4SLinus Torvalds } 4273445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, last, page + len); 42741da177e4SLinus Torvalds if (len > 0) 4275773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 42768e09f215SStefan Weinhuber } 42771da177e4SLinus Torvalds free_page((unsigned long) page); 42781da177e4SLinus Torvalds } 42791da177e4SLinus Torvalds 4280f3eb5384SStefan Weinhuber 4281f3eb5384SStefan Weinhuber /* 4282f3eb5384SStefan Weinhuber * Print sense data from a tcw. 4283f3eb5384SStefan Weinhuber */ 4284f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 4285f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 4286f3eb5384SStefan Weinhuber { 4287f3eb5384SStefan Weinhuber char *page; 4288f3eb5384SStefan Weinhuber int len, sl, sct, residual; 4289f3eb5384SStefan Weinhuber struct tsb *tsb; 4290ef19298bSStefan Weinhuber u8 *sense, *rcq; 4291f3eb5384SStefan Weinhuber 4292f3eb5384SStefan Weinhuber page = (char *) get_zeroed_page(GFP_ATOMIC); 4293f3eb5384SStefan Weinhuber if (page == NULL) { 4294fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, " %s", 4295f3eb5384SStefan Weinhuber "No memory to dump sense data"); 4296f3eb5384SStefan Weinhuber return; 4297f3eb5384SStefan Weinhuber } 4298f3eb5384SStefan Weinhuber /* dump the sense data */ 4299773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 4300f3eb5384SStefan Weinhuber " I/O status report for device %s:\n", 4301f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev)); 4302773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4303a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 4304a5a0061fSStefan Weinhuber "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", 4305a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 4306a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 4307a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 4308a5a0061fSStefan Weinhuber irb->scsw.tm.fcxs, irb->scsw.tm.schxs, 4309a5a0061fSStefan Weinhuber req ? req->intrc : 0); 4310773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4311f3eb5384SStefan Weinhuber " device %s: Failing TCW: %p\n", 4312f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev), 4313f3eb5384SStefan Weinhuber (void *) (addr_t) irb->scsw.tm.tcw); 4314f3eb5384SStefan Weinhuber 4315f3eb5384SStefan Weinhuber tsb = NULL; 4316f3eb5384SStefan Weinhuber sense = NULL; 4317a5a0061fSStefan Weinhuber if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) 4318f3eb5384SStefan Weinhuber tsb = tcw_get_tsb( 4319f3eb5384SStefan Weinhuber (struct tcw *)(unsigned long)irb->scsw.tm.tcw); 4320f3eb5384SStefan Weinhuber 4321b8fde722SStefan Haberland if (tsb) { 4322773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4323f3eb5384SStefan Weinhuber " tsb->length %d\n", tsb->length); 4324773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4325f3eb5384SStefan Weinhuber " tsb->flags %x\n", tsb->flags); 4326773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4327f3eb5384SStefan Weinhuber " tsb->dcw_offset %d\n", tsb->dcw_offset); 4328773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4329f3eb5384SStefan Weinhuber " tsb->count %d\n", tsb->count); 4330f3eb5384SStefan Weinhuber residual = tsb->count - 28; 4331773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4332f3eb5384SStefan Weinhuber " residual %d\n", residual); 4333f3eb5384SStefan Weinhuber 4334f3eb5384SStefan Weinhuber switch (tsb->flags & 0x07) { 4335f3eb5384SStefan Weinhuber case 1: /* tsa_iostat */ 4336773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4337f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_time %d\n", 4338f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_time); 4339773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4340f3eb5384SStefan Weinhuber " tsb->tsa.iostat.def_time %d\n", 4341f3eb5384SStefan Weinhuber tsb->tsa.iostat.def_time); 4342773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4343f3eb5384SStefan Weinhuber " tsb->tsa.iostat.queue_time %d\n", 4344f3eb5384SStefan Weinhuber tsb->tsa.iostat.queue_time); 4345773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4346f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_busy_time %d\n", 4347f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_busy_time); 4348773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4349f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_act_time %d\n", 4350f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_act_time); 4351f3eb5384SStefan Weinhuber sense = tsb->tsa.iostat.sense; 4352f3eb5384SStefan Weinhuber break; 4353f3eb5384SStefan Weinhuber case 2: /* ts_ddpc */ 4354773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4355f3eb5384SStefan Weinhuber " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); 4356ef19298bSStefan Weinhuber for (sl = 0; sl < 2; sl++) { 4357773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4358ef19298bSStefan Weinhuber " tsb->tsa.ddpc.rcq %2d-%2d: ", 4359ef19298bSStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 4360ef19298bSStefan Weinhuber rcq = tsb->tsa.ddpc.rcq; 4361f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 4362f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 4363ef19298bSStefan Weinhuber rcq[8 * sl + sct]); 4364f3eb5384SStefan Weinhuber } 4365f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 4366f3eb5384SStefan Weinhuber } 4367f3eb5384SStefan Weinhuber sense = tsb->tsa.ddpc.sense; 4368f3eb5384SStefan Weinhuber break; 4369f3eb5384SStefan Weinhuber case 3: /* tsa_intrg */ 4370773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4371f3eb5384SStefan Weinhuber " tsb->tsa.intrg.: not supportet yet\n"); 4372f3eb5384SStefan Weinhuber break; 4373f3eb5384SStefan Weinhuber } 4374f3eb5384SStefan Weinhuber 4375f3eb5384SStefan Weinhuber if (sense) { 4376f3eb5384SStefan Weinhuber for (sl = 0; sl < 4; sl++) { 4377773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4378f3eb5384SStefan Weinhuber " Sense(hex) %2d-%2d:", 4379f3eb5384SStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 4380f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 4381f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 4382f3eb5384SStefan Weinhuber sense[8 * sl + sct]); 4383f3eb5384SStefan Weinhuber } 4384f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 4385f3eb5384SStefan Weinhuber } 4386f3eb5384SStefan Weinhuber 4387f3eb5384SStefan Weinhuber if (sense[27] & DASD_SENSE_BIT_0) { 4388f3eb5384SStefan Weinhuber /* 24 Byte Sense Data */ 4389773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4390f3eb5384SStefan Weinhuber " 24 Byte: %x MSG %x, " 4391f3eb5384SStefan Weinhuber "%s MSGb to SYSOP\n", 4392f3eb5384SStefan Weinhuber sense[7] >> 4, sense[7] & 0x0f, 4393f3eb5384SStefan Weinhuber sense[1] & 0x10 ? "" : "no"); 4394f3eb5384SStefan Weinhuber } else { 4395f3eb5384SStefan Weinhuber /* 32 Byte Sense Data */ 4396773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4397f3eb5384SStefan Weinhuber " 32 Byte: Format: %x " 4398f3eb5384SStefan Weinhuber "Exception class %x\n", 4399f3eb5384SStefan Weinhuber sense[6] & 0x0f, sense[22] >> 4); 4400f3eb5384SStefan Weinhuber } 4401f3eb5384SStefan Weinhuber } else { 4402773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4403f3eb5384SStefan Weinhuber " SORRY - NO VALID SENSE AVAILABLE\n"); 4404f3eb5384SStefan Weinhuber } 4405f3eb5384SStefan Weinhuber } else { 4406773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4407f3eb5384SStefan Weinhuber " SORRY - NO TSB DATA AVAILABLE\n"); 4408f3eb5384SStefan Weinhuber } 4409773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 4410f3eb5384SStefan Weinhuber free_page((unsigned long) page); 4411f3eb5384SStefan Weinhuber } 4412f3eb5384SStefan Weinhuber 4413f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense(struct dasd_device *device, 4414f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 4415f3eb5384SStefan Weinhuber { 4416a5a0061fSStefan Weinhuber if (scsw_is_tm(&irb->scsw)) 4417f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_tcw(device, req, irb); 4418f3eb5384SStefan Weinhuber else 4419f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_ccw(device, req, irb); 4420f3eb5384SStefan Weinhuber } 4421f3eb5384SStefan Weinhuber 4422501183f2SStefan Haberland static int dasd_eckd_pm_freeze(struct dasd_device *device) 4423d41dd122SStefan Haberland { 4424d41dd122SStefan Haberland /* 4425d41dd122SStefan Haberland * the device should be disconnected from our LCU structure 4426d41dd122SStefan Haberland * on restore we will reconnect it and reread LCU specific 4427d41dd122SStefan Haberland * information like PAV support that might have changed 4428d41dd122SStefan Haberland */ 4429d41dd122SStefan Haberland dasd_alias_remove_device(device); 4430d41dd122SStefan Haberland dasd_alias_disconnect_device_from_lcu(device); 4431d41dd122SStefan Haberland 4432d41dd122SStefan Haberland return 0; 4433d41dd122SStefan Haberland } 4434d41dd122SStefan Haberland 4435501183f2SStefan Haberland static int dasd_eckd_restore_device(struct dasd_device *device) 4436d41dd122SStefan Haberland { 4437543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 44386fca97a9SStefan Haberland struct dasd_eckd_characteristics temp_rdc_data; 4439f9f8d02fSStefan Haberland int rc; 4440d41dd122SStefan Haberland struct dasd_uid temp_uid; 4441a7602f6cSStefan Haberland unsigned long flags; 4442ea4da6eaSStefan Haberland unsigned long cqr_flags = 0; 4443d41dd122SStefan Haberland 4444d41dd122SStefan Haberland /* Read Configuration Data */ 4445251afd69SStefan Haberland rc = dasd_eckd_read_conf(device); 4446251afd69SStefan Haberland if (rc) { 4447251afd69SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 4448251afd69SStefan Haberland "Read configuration data failed, rc=%d", rc); 4449251afd69SStefan Haberland goto out_err; 4450251afd69SStefan Haberland } 4451d41dd122SStefan Haberland 44522dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 44532dedf0d9SStefan Haberland /* Generate device unique id */ 44542dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 44552dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4456d41dd122SStefan Haberland if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) 4457a7602f6cSStefan Haberland dev_err(&device->cdev->dev, "The UID of the DASD has " 4458a7602f6cSStefan Haberland "changed\n"); 44592dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4460d41dd122SStefan Haberland if (rc) 4461d41dd122SStefan Haberland goto out_err; 4462d41dd122SStefan Haberland 4463d41dd122SStefan Haberland /* register lcu with alias handling, enable PAV if this is a new lcu */ 4464f9f8d02fSStefan Haberland rc = dasd_alias_make_device_known_to_lcu(device); 4465f9f8d02fSStefan Haberland if (rc) 4466251afd69SStefan Haberland goto out_err; 4467ea4da6eaSStefan Haberland 4468ea4da6eaSStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr_flags); 4469ea4da6eaSStefan Haberland dasd_eckd_validate_server(device, cqr_flags); 4470f4ac1d02SStefan Weinhuber 4471f4ac1d02SStefan Weinhuber /* RE-Read Configuration Data */ 4472251afd69SStefan Haberland rc = dasd_eckd_read_conf(device); 4473251afd69SStefan Haberland if (rc) { 4474251afd69SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 4475251afd69SStefan Haberland "Read configuration data failed, rc=%d", rc); 4476251afd69SStefan Haberland goto out_err2; 4477251afd69SStefan Haberland } 4478d41dd122SStefan Haberland 4479d41dd122SStefan Haberland /* Read Feature Codes */ 448068d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 4481d41dd122SStefan Haberland 4482d41dd122SStefan Haberland /* Read Device Characteristics */ 448368b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 44846fca97a9SStefan Haberland &temp_rdc_data, 64); 4485d41dd122SStefan Haberland if (rc) { 4486b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 4487b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 4488251afd69SStefan Haberland goto out_err2; 4489d41dd122SStefan Haberland } 4490a7602f6cSStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 44916fca97a9SStefan Haberland memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data)); 4492a7602f6cSStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4493d41dd122SStefan Haberland 4494d41dd122SStefan Haberland /* add device to alias management */ 4495d41dd122SStefan Haberland dasd_alias_add_device(device); 4496d41dd122SStefan Haberland 4497d41dd122SStefan Haberland return 0; 4498d41dd122SStefan Haberland 4499251afd69SStefan Haberland out_err2: 4500251afd69SStefan Haberland dasd_alias_disconnect_device_from_lcu(device); 4501d41dd122SStefan Haberland out_err: 4502e6125fbaSStefan Haberland return -1; 4503d41dd122SStefan Haberland } 4504d41dd122SStefan Haberland 4505501183f2SStefan Haberland static int dasd_eckd_reload_device(struct dasd_device *device) 4506501183f2SStefan Haberland { 4507543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 4508501183f2SStefan Haberland int rc, old_base; 45092dedf0d9SStefan Haberland char print_uid[60]; 45102dedf0d9SStefan Haberland struct dasd_uid uid; 45112dedf0d9SStefan Haberland unsigned long flags; 4512501183f2SStefan Haberland 451359a9ed5fSStefan Haberland /* 451459a9ed5fSStefan Haberland * remove device from alias handling to prevent new requests 451559a9ed5fSStefan Haberland * from being scheduled on the wrong alias device 451659a9ed5fSStefan Haberland */ 451759a9ed5fSStefan Haberland dasd_alias_remove_device(device); 451859a9ed5fSStefan Haberland 45192dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4520501183f2SStefan Haberland old_base = private->uid.base_unit_addr; 45212dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 45222dedf0d9SStefan Haberland 4523501183f2SStefan Haberland /* Read Configuration Data */ 4524501183f2SStefan Haberland rc = dasd_eckd_read_conf(device); 4525501183f2SStefan Haberland if (rc) 4526501183f2SStefan Haberland goto out_err; 4527501183f2SStefan Haberland 45282dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 4529501183f2SStefan Haberland if (rc) 4530501183f2SStefan Haberland goto out_err; 4531501183f2SStefan Haberland /* 4532501183f2SStefan Haberland * update unit address configuration and 4533501183f2SStefan Haberland * add device to alias management 4534501183f2SStefan Haberland */ 4535501183f2SStefan Haberland dasd_alias_update_add_device(device); 4536501183f2SStefan Haberland 45372dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &uid); 45382dedf0d9SStefan Haberland 45392dedf0d9SStefan Haberland if (old_base != uid.base_unit_addr) { 45402dedf0d9SStefan Haberland if (strlen(uid.vduit) > 0) 45412dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 45422dedf0d9SStefan Haberland "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial, 45432dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr, uid.vduit); 4544501183f2SStefan Haberland else 45452dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 45462dedf0d9SStefan Haberland "%s.%s.%04x.%02x", uid.vendor, uid.serial, 45472dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr); 4548501183f2SStefan Haberland 4549501183f2SStefan Haberland dev_info(&device->cdev->dev, 4550501183f2SStefan Haberland "An Alias device was reassigned to a new base device " 45512dedf0d9SStefan Haberland "with UID: %s\n", print_uid); 4552501183f2SStefan Haberland } 4553501183f2SStefan Haberland return 0; 4554501183f2SStefan Haberland 4555501183f2SStefan Haberland out_err: 4556501183f2SStefan Haberland return -1; 4557501183f2SStefan Haberland } 4558501183f2SStefan Haberland 45595db8440cSStefan Haberland static int dasd_eckd_read_message_buffer(struct dasd_device *device, 45605db8440cSStefan Haberland struct dasd_rssd_messages *messages, 45615db8440cSStefan Haberland __u8 lpum) 45625db8440cSStefan Haberland { 45635db8440cSStefan Haberland struct dasd_rssd_messages *message_buf; 45645db8440cSStefan Haberland struct dasd_psf_prssd_data *prssdp; 45655db8440cSStefan Haberland struct dasd_ccw_req *cqr; 45665db8440cSStefan Haberland struct ccw1 *ccw; 45675db8440cSStefan Haberland int rc; 45685db8440cSStefan Haberland 45695db8440cSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 45705db8440cSStefan Haberland (sizeof(struct dasd_psf_prssd_data) + 45715db8440cSStefan Haberland sizeof(struct dasd_rssd_messages)), 45725db8440cSStefan Haberland device); 45735db8440cSStefan Haberland if (IS_ERR(cqr)) { 45745db8440cSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 45755db8440cSStefan Haberland "Could not allocate read message buffer request"); 45765db8440cSStefan Haberland return PTR_ERR(cqr); 45775db8440cSStefan Haberland } 45785db8440cSStefan Haberland 45795db8440cSStefan Haberland cqr->startdev = device; 45805db8440cSStefan Haberland cqr->memdev = device; 45815db8440cSStefan Haberland cqr->block = NULL; 45825db8440cSStefan Haberland cqr->expires = 10 * HZ; 45835db8440cSStefan Haberland set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 4584b179b037SStefan Haberland /* dasd_sleep_on_immediatly does not do complex error 4585b179b037SStefan Haberland * recovery so clear erp flag and set retry counter to 4586b179b037SStefan Haberland * do basic erp */ 4587b179b037SStefan Haberland clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 4588b179b037SStefan Haberland cqr->retries = 256; 45895db8440cSStefan Haberland 45905db8440cSStefan Haberland /* Prepare for Read Subsystem Data */ 45915db8440cSStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 45925db8440cSStefan Haberland memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 45935db8440cSStefan Haberland prssdp->order = PSF_ORDER_PRSSD; 45945db8440cSStefan Haberland prssdp->suborder = 0x03; /* Message Buffer */ 45955db8440cSStefan Haberland /* all other bytes of prssdp must be zero */ 45965db8440cSStefan Haberland 45975db8440cSStefan Haberland ccw = cqr->cpaddr; 45985db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 45995db8440cSStefan Haberland ccw->count = sizeof(struct dasd_psf_prssd_data); 46005db8440cSStefan Haberland ccw->flags |= CCW_FLAG_CC; 46015db8440cSStefan Haberland ccw->flags |= CCW_FLAG_SLI; 46025db8440cSStefan Haberland ccw->cda = (__u32)(addr_t) prssdp; 46035db8440cSStefan Haberland 46045db8440cSStefan Haberland /* Read Subsystem Data - message buffer */ 46055db8440cSStefan Haberland message_buf = (struct dasd_rssd_messages *) (prssdp + 1); 46065db8440cSStefan Haberland memset(message_buf, 0, sizeof(struct dasd_rssd_messages)); 46075db8440cSStefan Haberland 46085db8440cSStefan Haberland ccw++; 46095db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_RSSD; 46105db8440cSStefan Haberland ccw->count = sizeof(struct dasd_rssd_messages); 46115db8440cSStefan Haberland ccw->flags |= CCW_FLAG_SLI; 46125db8440cSStefan Haberland ccw->cda = (__u32)(addr_t) message_buf; 46135db8440cSStefan Haberland 46145db8440cSStefan Haberland cqr->buildclk = get_tod_clock(); 46155db8440cSStefan Haberland cqr->status = DASD_CQR_FILLED; 46165db8440cSStefan Haberland rc = dasd_sleep_on_immediatly(cqr); 46175db8440cSStefan Haberland if (rc == 0) { 46185db8440cSStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 46195db8440cSStefan Haberland message_buf = (struct dasd_rssd_messages *) 46205db8440cSStefan Haberland (prssdp + 1); 46215db8440cSStefan Haberland memcpy(messages, message_buf, 46225db8440cSStefan Haberland sizeof(struct dasd_rssd_messages)); 46235db8440cSStefan Haberland } else 46245db8440cSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 46255db8440cSStefan Haberland "Reading messages failed with rc=%d\n" 46265db8440cSStefan Haberland , rc); 46275db8440cSStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 46285db8440cSStefan Haberland return rc; 46295db8440cSStefan Haberland } 46305db8440cSStefan Haberland 46315a3b7b11SStefan Haberland static int dasd_eckd_query_host_access(struct dasd_device *device, 46325a3b7b11SStefan Haberland struct dasd_psf_query_host_access *data) 46335a3b7b11SStefan Haberland { 46345a3b7b11SStefan Haberland struct dasd_eckd_private *private = device->private; 46355a3b7b11SStefan Haberland struct dasd_psf_query_host_access *host_access; 46365a3b7b11SStefan Haberland struct dasd_psf_prssd_data *prssdp; 46375a3b7b11SStefan Haberland struct dasd_ccw_req *cqr; 46385a3b7b11SStefan Haberland struct ccw1 *ccw; 46395a3b7b11SStefan Haberland int rc; 46405a3b7b11SStefan Haberland 46415a3b7b11SStefan Haberland /* not available for HYPER PAV alias devices */ 46425a3b7b11SStefan Haberland if (!device->block && private->lcu->pav == HYPER_PAV) 46435a3b7b11SStefan Haberland return -EOPNOTSUPP; 46445a3b7b11SStefan Haberland 46455a3b7b11SStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 46465a3b7b11SStefan Haberland sizeof(struct dasd_psf_prssd_data) + 1, 46475a3b7b11SStefan Haberland device); 46485a3b7b11SStefan Haberland if (IS_ERR(cqr)) { 46495a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 46505a3b7b11SStefan Haberland "Could not allocate read message buffer request"); 46515a3b7b11SStefan Haberland return PTR_ERR(cqr); 46525a3b7b11SStefan Haberland } 46535a3b7b11SStefan Haberland host_access = kzalloc(sizeof(*host_access), GFP_KERNEL | GFP_DMA); 46545a3b7b11SStefan Haberland if (!host_access) { 46555a3b7b11SStefan Haberland dasd_sfree_request(cqr, device); 46565a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 46575a3b7b11SStefan Haberland "Could not allocate host_access buffer"); 46585a3b7b11SStefan Haberland return -ENOMEM; 46595a3b7b11SStefan Haberland } 46605a3b7b11SStefan Haberland cqr->startdev = device; 46615a3b7b11SStefan Haberland cqr->memdev = device; 46625a3b7b11SStefan Haberland cqr->block = NULL; 46635a3b7b11SStefan Haberland cqr->retries = 256; 46645a3b7b11SStefan Haberland cqr->expires = 10 * HZ; 46655a3b7b11SStefan Haberland 46665a3b7b11SStefan Haberland /* Prepare for Read Subsystem Data */ 46675a3b7b11SStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 46685a3b7b11SStefan Haberland memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 46695a3b7b11SStefan Haberland prssdp->order = PSF_ORDER_PRSSD; 46705a3b7b11SStefan Haberland prssdp->suborder = PSF_SUBORDER_QHA; /* query host access */ 46715a3b7b11SStefan Haberland /* LSS and Volume that will be queried */ 46725a3b7b11SStefan Haberland prssdp->lss = private->ned->ID; 46735a3b7b11SStefan Haberland prssdp->volume = private->ned->unit_addr; 46745a3b7b11SStefan Haberland /* all other bytes of prssdp must be zero */ 46755a3b7b11SStefan Haberland 46765a3b7b11SStefan Haberland ccw = cqr->cpaddr; 46775a3b7b11SStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 46785a3b7b11SStefan Haberland ccw->count = sizeof(struct dasd_psf_prssd_data); 46795a3b7b11SStefan Haberland ccw->flags |= CCW_FLAG_CC; 46805a3b7b11SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 46815a3b7b11SStefan Haberland ccw->cda = (__u32)(addr_t) prssdp; 46825a3b7b11SStefan Haberland 46835a3b7b11SStefan Haberland /* Read Subsystem Data - query host access */ 46845a3b7b11SStefan Haberland ccw++; 46855a3b7b11SStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_RSSD; 46865a3b7b11SStefan Haberland ccw->count = sizeof(struct dasd_psf_query_host_access); 46875a3b7b11SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 46885a3b7b11SStefan Haberland ccw->cda = (__u32)(addr_t) host_access; 46895a3b7b11SStefan Haberland 46905a3b7b11SStefan Haberland cqr->buildclk = get_tod_clock(); 46915a3b7b11SStefan Haberland cqr->status = DASD_CQR_FILLED; 46925a3b7b11SStefan Haberland rc = dasd_sleep_on(cqr); 46935a3b7b11SStefan Haberland if (rc == 0) { 46945a3b7b11SStefan Haberland *data = *host_access; 46955a3b7b11SStefan Haberland } else { 46965a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 46975a3b7b11SStefan Haberland "Reading host access data failed with rc=%d\n", 46985a3b7b11SStefan Haberland rc); 46995a3b7b11SStefan Haberland rc = -EOPNOTSUPP; 47005a3b7b11SStefan Haberland } 47015a3b7b11SStefan Haberland 47025a3b7b11SStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 47035a3b7b11SStefan Haberland kfree(host_access); 47045a3b7b11SStefan Haberland return rc; 47055a3b7b11SStefan Haberland } 47065a3b7b11SStefan Haberland /* 47075a3b7b11SStefan Haberland * return number of grouped devices 47085a3b7b11SStefan Haberland */ 47095a3b7b11SStefan Haberland static int dasd_eckd_host_access_count(struct dasd_device *device) 47105a3b7b11SStefan Haberland { 47115a3b7b11SStefan Haberland struct dasd_psf_query_host_access *access; 47125a3b7b11SStefan Haberland struct dasd_ckd_path_group_entry *entry; 47135a3b7b11SStefan Haberland struct dasd_ckd_host_information *info; 47145a3b7b11SStefan Haberland int count = 0; 47155a3b7b11SStefan Haberland int rc, i; 47165a3b7b11SStefan Haberland 47175a3b7b11SStefan Haberland access = kzalloc(sizeof(*access), GFP_NOIO); 47185a3b7b11SStefan Haberland if (!access) { 47195a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 47205a3b7b11SStefan Haberland "Could not allocate access buffer"); 47215a3b7b11SStefan Haberland return -ENOMEM; 47225a3b7b11SStefan Haberland } 47235a3b7b11SStefan Haberland rc = dasd_eckd_query_host_access(device, access); 47245a3b7b11SStefan Haberland if (rc) { 47255a3b7b11SStefan Haberland kfree(access); 47265a3b7b11SStefan Haberland return rc; 47275a3b7b11SStefan Haberland } 47285a3b7b11SStefan Haberland 47295a3b7b11SStefan Haberland info = (struct dasd_ckd_host_information *) 47305a3b7b11SStefan Haberland access->host_access_information; 47315a3b7b11SStefan Haberland for (i = 0; i < info->entry_count; i++) { 47325a3b7b11SStefan Haberland entry = (struct dasd_ckd_path_group_entry *) 47335a3b7b11SStefan Haberland (info->entry + i * info->entry_size); 47345a3b7b11SStefan Haberland if (entry->status_flags & DASD_ECKD_PG_GROUPED) 47355a3b7b11SStefan Haberland count++; 47365a3b7b11SStefan Haberland } 47375a3b7b11SStefan Haberland 47385a3b7b11SStefan Haberland kfree(access); 47395a3b7b11SStefan Haberland return count; 47405a3b7b11SStefan Haberland } 47415a3b7b11SStefan Haberland 47425a3b7b11SStefan Haberland /* 47435a3b7b11SStefan Haberland * write host access information to a sequential file 47445a3b7b11SStefan Haberland */ 47455a3b7b11SStefan Haberland static int dasd_hosts_print(struct dasd_device *device, struct seq_file *m) 47465a3b7b11SStefan Haberland { 47475a3b7b11SStefan Haberland struct dasd_psf_query_host_access *access; 47485a3b7b11SStefan Haberland struct dasd_ckd_path_group_entry *entry; 47495a3b7b11SStefan Haberland struct dasd_ckd_host_information *info; 47505a3b7b11SStefan Haberland char sysplex[9] = ""; 47515a3b7b11SStefan Haberland int rc, i, j; 47525a3b7b11SStefan Haberland 47535a3b7b11SStefan Haberland access = kzalloc(sizeof(*access), GFP_NOIO); 47545a3b7b11SStefan Haberland if (!access) { 47555a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 47565a3b7b11SStefan Haberland "Could not allocate access buffer"); 47575a3b7b11SStefan Haberland return -ENOMEM; 47585a3b7b11SStefan Haberland } 47595a3b7b11SStefan Haberland rc = dasd_eckd_query_host_access(device, access); 47605a3b7b11SStefan Haberland if (rc) { 47615a3b7b11SStefan Haberland kfree(access); 47625a3b7b11SStefan Haberland return rc; 47635a3b7b11SStefan Haberland } 47645a3b7b11SStefan Haberland 47655a3b7b11SStefan Haberland info = (struct dasd_ckd_host_information *) 47665a3b7b11SStefan Haberland access->host_access_information; 47675a3b7b11SStefan Haberland for (i = 0; i < info->entry_count; i++) { 47685a3b7b11SStefan Haberland entry = (struct dasd_ckd_path_group_entry *) 47695a3b7b11SStefan Haberland (info->entry + i * info->entry_size); 47705a3b7b11SStefan Haberland /* PGID */ 47715a3b7b11SStefan Haberland seq_puts(m, "pgid "); 47725a3b7b11SStefan Haberland for (j = 0; j < 11; j++) 47735a3b7b11SStefan Haberland seq_printf(m, "%02x", entry->pgid[j]); 47745a3b7b11SStefan Haberland seq_putc(m, '\n'); 47755a3b7b11SStefan Haberland /* FLAGS */ 47765a3b7b11SStefan Haberland seq_printf(m, "status_flags %02x\n", entry->status_flags); 47775a3b7b11SStefan Haberland /* SYSPLEX NAME */ 47785a3b7b11SStefan Haberland memcpy(&sysplex, &entry->sysplex_name, sizeof(sysplex) - 1); 47795a3b7b11SStefan Haberland EBCASC(sysplex, sizeof(sysplex)); 47805a3b7b11SStefan Haberland seq_printf(m, "sysplex_name %8s\n", sysplex); 47815a3b7b11SStefan Haberland /* SUPPORTED CYLINDER */ 47825a3b7b11SStefan Haberland seq_printf(m, "supported_cylinder %d\n", entry->cylinder); 47835a3b7b11SStefan Haberland /* TIMESTAMP */ 47845a3b7b11SStefan Haberland seq_printf(m, "timestamp %lu\n", (unsigned long) 47855a3b7b11SStefan Haberland entry->timestamp); 47865a3b7b11SStefan Haberland } 47875a3b7b11SStefan Haberland kfree(access); 47885a3b7b11SStefan Haberland 47895a3b7b11SStefan Haberland return 0; 47905a3b7b11SStefan Haberland } 47915a3b7b11SStefan Haberland 47925db8440cSStefan Haberland /* 47935db8440cSStefan Haberland * Perform Subsystem Function - CUIR response 47945db8440cSStefan Haberland */ 47955db8440cSStefan Haberland static int 47965db8440cSStefan Haberland dasd_eckd_psf_cuir_response(struct dasd_device *device, int response, 47975db8440cSStefan Haberland __u32 message_id, 47985db8440cSStefan Haberland struct channel_path_desc *desc, 47995db8440cSStefan Haberland struct subchannel_id sch_id) 48005db8440cSStefan Haberland { 48015db8440cSStefan Haberland struct dasd_psf_cuir_response *psf_cuir; 48025db8440cSStefan Haberland struct dasd_ccw_req *cqr; 48035db8440cSStefan Haberland struct ccw1 *ccw; 48045db8440cSStefan Haberland int rc; 48055db8440cSStefan Haberland 48065db8440cSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 48075db8440cSStefan Haberland sizeof(struct dasd_psf_cuir_response), 48085db8440cSStefan Haberland device); 48095db8440cSStefan Haberland 48105db8440cSStefan Haberland if (IS_ERR(cqr)) { 48115db8440cSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 48125db8440cSStefan Haberland "Could not allocate PSF-CUIR request"); 48135db8440cSStefan Haberland return PTR_ERR(cqr); 48145db8440cSStefan Haberland } 48155db8440cSStefan Haberland 48165db8440cSStefan Haberland psf_cuir = (struct dasd_psf_cuir_response *)cqr->data; 48175db8440cSStefan Haberland psf_cuir->order = PSF_ORDER_CUIR_RESPONSE; 48185db8440cSStefan Haberland psf_cuir->cc = response; 48195db8440cSStefan Haberland if (desc) 48205db8440cSStefan Haberland psf_cuir->chpid = desc->chpid; 48215db8440cSStefan Haberland psf_cuir->message_id = message_id; 48225db8440cSStefan Haberland psf_cuir->cssid = sch_id.cssid; 48235db8440cSStefan Haberland psf_cuir->ssid = sch_id.ssid; 48245db8440cSStefan Haberland ccw = cqr->cpaddr; 48255db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 48265db8440cSStefan Haberland ccw->cda = (__u32)(addr_t)psf_cuir; 4827b179b037SStefan Haberland ccw->flags = CCW_FLAG_SLI; 48285db8440cSStefan Haberland ccw->count = sizeof(struct dasd_psf_cuir_response); 48295db8440cSStefan Haberland 48305db8440cSStefan Haberland cqr->startdev = device; 48315db8440cSStefan Haberland cqr->memdev = device; 48325db8440cSStefan Haberland cqr->block = NULL; 48335db8440cSStefan Haberland cqr->retries = 256; 48345db8440cSStefan Haberland cqr->expires = 10*HZ; 48355db8440cSStefan Haberland cqr->buildclk = get_tod_clock(); 48365db8440cSStefan Haberland cqr->status = DASD_CQR_FILLED; 4837b179b037SStefan Haberland set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 48385db8440cSStefan Haberland 48395db8440cSStefan Haberland rc = dasd_sleep_on(cqr); 48405db8440cSStefan Haberland 48415db8440cSStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 48425db8440cSStefan Haberland return rc; 48435db8440cSStefan Haberland } 48445db8440cSStefan Haberland 4845b179b037SStefan Haberland /* 4846b179b037SStefan Haberland * return configuration data that is referenced by record selector 4847b179b037SStefan Haberland * if a record selector is specified or per default return the 4848b179b037SStefan Haberland * conf_data pointer for the path specified by lpum 4849b179b037SStefan Haberland */ 4850b179b037SStefan Haberland static struct dasd_conf_data *dasd_eckd_get_ref_conf(struct dasd_device *device, 4851b179b037SStefan Haberland __u8 lpum, 4852b179b037SStefan Haberland struct dasd_cuir_message *cuir) 48535db8440cSStefan Haberland { 4854543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 4855b179b037SStefan Haberland struct dasd_conf_data *conf_data; 4856b179b037SStefan Haberland int path, pos; 48575db8440cSStefan Haberland 4858b179b037SStefan Haberland if (cuir->record_selector == 0) 4859b179b037SStefan Haberland goto out; 4860b179b037SStefan Haberland for (path = 0x80, pos = 0; path; path >>= 1, pos++) { 4861b179b037SStefan Haberland conf_data = private->path_conf_data[pos]; 4862b179b037SStefan Haberland if (conf_data->gneq.record_selector == 4863b179b037SStefan Haberland cuir->record_selector) 4864b179b037SStefan Haberland return conf_data; 48655db8440cSStefan Haberland } 4866b179b037SStefan Haberland out: 48679d49f86dSSebastian Ott return private->path_conf_data[pathmask_to_pos(lpum)]; 48685db8440cSStefan Haberland } 48695db8440cSStefan Haberland 48705db8440cSStefan Haberland /* 4871b179b037SStefan Haberland * This function determines the scope of a reconfiguration request by 4872b179b037SStefan Haberland * analysing the path and device selection data provided in the CUIR request. 4873b179b037SStefan Haberland * Returns a path mask containing CUIR affected paths for the give device. 4874b179b037SStefan Haberland * 4875b179b037SStefan Haberland * If the CUIR request does not contain the required information return the 4876b179b037SStefan Haberland * path mask of the path the attention message for the CUIR request was reveived 4877b179b037SStefan Haberland * on. 4878b179b037SStefan Haberland */ 4879b179b037SStefan Haberland static int dasd_eckd_cuir_scope(struct dasd_device *device, __u8 lpum, 4880b179b037SStefan Haberland struct dasd_cuir_message *cuir) 4881b179b037SStefan Haberland { 4882543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 4883b179b037SStefan Haberland struct dasd_conf_data *ref_conf_data; 4884b179b037SStefan Haberland unsigned long bitmask = 0, mask = 0; 4885b179b037SStefan Haberland struct dasd_conf_data *conf_data; 4886b179b037SStefan Haberland unsigned int pos, path; 4887b179b037SStefan Haberland char *ref_gneq, *gneq; 4888b179b037SStefan Haberland char *ref_ned, *ned; 4889b179b037SStefan Haberland int tbcpm = 0; 4890b179b037SStefan Haberland 4891b179b037SStefan Haberland /* if CUIR request does not specify the scope use the path 4892b179b037SStefan Haberland the attention message was presented on */ 4893b179b037SStefan Haberland if (!cuir->ned_map || 4894b179b037SStefan Haberland !(cuir->neq_map[0] | cuir->neq_map[1] | cuir->neq_map[2])) 4895b179b037SStefan Haberland return lpum; 4896b179b037SStefan Haberland 4897b179b037SStefan Haberland /* get reference conf data */ 4898b179b037SStefan Haberland ref_conf_data = dasd_eckd_get_ref_conf(device, lpum, cuir); 4899b179b037SStefan Haberland /* reference ned is determined by ned_map field */ 4900b179b037SStefan Haberland pos = 8 - ffs(cuir->ned_map); 4901b179b037SStefan Haberland ref_ned = (char *)&ref_conf_data->neds[pos]; 4902b179b037SStefan Haberland ref_gneq = (char *)&ref_conf_data->gneq; 4903b179b037SStefan Haberland /* transfer 24 bit neq_map to mask */ 4904b179b037SStefan Haberland mask = cuir->neq_map[2]; 4905b179b037SStefan Haberland mask |= cuir->neq_map[1] << 8; 4906b179b037SStefan Haberland mask |= cuir->neq_map[0] << 16; 4907b179b037SStefan Haberland 4908b179b037SStefan Haberland for (path = 0x80; path; path >>= 1) { 4909b179b037SStefan Haberland /* initialise data per path */ 4910b179b037SStefan Haberland bitmask = mask; 49119d49f86dSSebastian Ott pos = pathmask_to_pos(path); 4912b179b037SStefan Haberland conf_data = private->path_conf_data[pos]; 4913b179b037SStefan Haberland pos = 8 - ffs(cuir->ned_map); 4914b179b037SStefan Haberland ned = (char *) &conf_data->neds[pos]; 4915b179b037SStefan Haberland /* compare reference ned and per path ned */ 4916b179b037SStefan Haberland if (memcmp(ref_ned, ned, sizeof(*ned)) != 0) 4917b179b037SStefan Haberland continue; 4918b179b037SStefan Haberland gneq = (char *)&conf_data->gneq; 4919b179b037SStefan Haberland /* compare reference gneq and per_path gneq under 4920b179b037SStefan Haberland 24 bit mask where mask bit 0 equals byte 7 of 4921b179b037SStefan Haberland the gneq and mask bit 24 equals byte 31 */ 4922b179b037SStefan Haberland while (bitmask) { 4923b179b037SStefan Haberland pos = ffs(bitmask) - 1; 4924b179b037SStefan Haberland if (memcmp(&ref_gneq[31 - pos], &gneq[31 - pos], 1) 4925b179b037SStefan Haberland != 0) 4926b179b037SStefan Haberland break; 4927b179b037SStefan Haberland clear_bit(pos, &bitmask); 4928b179b037SStefan Haberland } 4929b179b037SStefan Haberland if (bitmask) 4930b179b037SStefan Haberland continue; 4931b179b037SStefan Haberland /* device and path match the reference values 4932b179b037SStefan Haberland add path to CUIR scope */ 4933b179b037SStefan Haberland tbcpm |= path; 4934b179b037SStefan Haberland } 4935b179b037SStefan Haberland return tbcpm; 4936b179b037SStefan Haberland } 4937b179b037SStefan Haberland 4938b179b037SStefan Haberland static void dasd_eckd_cuir_notify_user(struct dasd_device *device, 4939b179b037SStefan Haberland unsigned long paths, 4940b179b037SStefan Haberland struct subchannel_id sch_id, int action) 4941b179b037SStefan Haberland { 4942b179b037SStefan Haberland struct channel_path_desc *desc; 4943b179b037SStefan Haberland int pos; 4944b179b037SStefan Haberland 4945b179b037SStefan Haberland while (paths) { 4946b179b037SStefan Haberland /* get position of bit in mask */ 4947b179b037SStefan Haberland pos = ffs(paths) - 1; 4948b179b037SStefan Haberland /* get channel path descriptor from this position */ 4949b179b037SStefan Haberland desc = ccw_device_get_chp_desc(device->cdev, 7 - pos); 4950b179b037SStefan Haberland if (action == CUIR_QUIESCE) 4951b179b037SStefan Haberland pr_warn("Service on the storage server caused path " 4952b179b037SStefan Haberland "%x.%02x to go offline", sch_id.cssid, 4953b179b037SStefan Haberland desc ? desc->chpid : 0); 4954b179b037SStefan Haberland else if (action == CUIR_RESUME) 4955b179b037SStefan Haberland pr_info("Path %x.%02x is back online after service " 4956b179b037SStefan Haberland "on the storage server", sch_id.cssid, 4957b179b037SStefan Haberland desc ? desc->chpid : 0); 4958b179b037SStefan Haberland kfree(desc); 4959b179b037SStefan Haberland clear_bit(pos, &paths); 4960b179b037SStefan Haberland } 4961b179b037SStefan Haberland } 4962b179b037SStefan Haberland 4963b179b037SStefan Haberland static int dasd_eckd_cuir_remove_path(struct dasd_device *device, __u8 lpum, 4964b179b037SStefan Haberland struct dasd_cuir_message *cuir) 4965b179b037SStefan Haberland { 4966b179b037SStefan Haberland unsigned long tbcpm; 4967b179b037SStefan Haberland 4968b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(device, lpum, cuir); 4969b179b037SStefan Haberland /* nothing to do if path is not in use */ 4970b179b037SStefan Haberland if (!(device->path_data.opm & tbcpm)) 4971b179b037SStefan Haberland return 0; 4972b179b037SStefan Haberland if (!(device->path_data.opm & ~tbcpm)) { 4973b179b037SStefan Haberland /* no path would be left if the CUIR action is taken 4974b179b037SStefan Haberland return error */ 4975b179b037SStefan Haberland return -EINVAL; 4976b179b037SStefan Haberland } 4977b179b037SStefan Haberland /* remove device from operational path mask */ 4978b179b037SStefan Haberland device->path_data.opm &= ~tbcpm; 4979b179b037SStefan Haberland device->path_data.cuirpm |= tbcpm; 4980b179b037SStefan Haberland return tbcpm; 4981b179b037SStefan Haberland } 4982b179b037SStefan Haberland 4983b179b037SStefan Haberland /* 4984b179b037SStefan Haberland * walk through all devices and build a path mask to quiesce them 4985b179b037SStefan Haberland * return an error if the last path to a device would be removed 49865db8440cSStefan Haberland * 49875db8440cSStefan Haberland * if only part of the devices are quiesced and an error 49885db8440cSStefan Haberland * occurs no onlining necessary, the storage server will 49895db8440cSStefan Haberland * notify the already set offline devices again 49905db8440cSStefan Haberland */ 49915db8440cSStefan Haberland static int dasd_eckd_cuir_quiesce(struct dasd_device *device, __u8 lpum, 4992b179b037SStefan Haberland struct subchannel_id sch_id, 4993b179b037SStefan Haberland struct dasd_cuir_message *cuir) 49945db8440cSStefan Haberland { 4995543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 49965db8440cSStefan Haberland struct alias_pav_group *pavgroup, *tempgroup; 49975db8440cSStefan Haberland struct dasd_device *dev, *n; 4998b179b037SStefan Haberland unsigned long paths = 0; 4999b179b037SStefan Haberland unsigned long flags; 5000b179b037SStefan Haberland int tbcpm; 50015db8440cSStefan Haberland 50025db8440cSStefan Haberland /* active devices */ 5003b179b037SStefan Haberland list_for_each_entry_safe(dev, n, &private->lcu->active_devices, 50045db8440cSStefan Haberland alias_list) { 5005b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 5006b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 5007b179b037SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); 5008b179b037SStefan Haberland if (tbcpm < 0) 5009b179b037SStefan Haberland goto out_err; 5010b179b037SStefan Haberland paths |= tbcpm; 50115db8440cSStefan Haberland } 50125db8440cSStefan Haberland /* inactive devices */ 5013b179b037SStefan Haberland list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices, 50145db8440cSStefan Haberland alias_list) { 5015b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 5016b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 5017b179b037SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); 5018b179b037SStefan Haberland if (tbcpm < 0) 5019b179b037SStefan Haberland goto out_err; 5020b179b037SStefan Haberland paths |= tbcpm; 50215db8440cSStefan Haberland } 50225db8440cSStefan Haberland /* devices in PAV groups */ 50235db8440cSStefan Haberland list_for_each_entry_safe(pavgroup, tempgroup, 50245db8440cSStefan Haberland &private->lcu->grouplist, group) { 50255db8440cSStefan Haberland list_for_each_entry_safe(dev, n, &pavgroup->baselist, 50265db8440cSStefan Haberland alias_list) { 5027b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 5028b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 5029b179b037SStefan Haberland spin_unlock_irqrestore( 5030b179b037SStefan Haberland get_ccwdev_lock(dev->cdev), flags); 5031b179b037SStefan Haberland if (tbcpm < 0) 5032b179b037SStefan Haberland goto out_err; 5033b179b037SStefan Haberland paths |= tbcpm; 50345db8440cSStefan Haberland } 50355db8440cSStefan Haberland list_for_each_entry_safe(dev, n, &pavgroup->aliaslist, 50365db8440cSStefan Haberland alias_list) { 5037b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 5038b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 5039b179b037SStefan Haberland spin_unlock_irqrestore( 5040b179b037SStefan Haberland get_ccwdev_lock(dev->cdev), flags); 5041b179b037SStefan Haberland if (tbcpm < 0) 5042b179b037SStefan Haberland goto out_err; 5043b179b037SStefan Haberland paths |= tbcpm; 50445db8440cSStefan Haberland } 50455db8440cSStefan Haberland } 5046b179b037SStefan Haberland /* notify user about all paths affected by CUIR action */ 5047b179b037SStefan Haberland dasd_eckd_cuir_notify_user(device, paths, sch_id, CUIR_QUIESCE); 5048b179b037SStefan Haberland return 0; 5049b179b037SStefan Haberland out_err: 5050b179b037SStefan Haberland return tbcpm; 50515db8440cSStefan Haberland } 50525db8440cSStefan Haberland 50535db8440cSStefan Haberland static int dasd_eckd_cuir_resume(struct dasd_device *device, __u8 lpum, 5054b179b037SStefan Haberland struct subchannel_id sch_id, 5055b179b037SStefan Haberland struct dasd_cuir_message *cuir) 50565db8440cSStefan Haberland { 5057543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 50585db8440cSStefan Haberland struct alias_pav_group *pavgroup, *tempgroup; 50595db8440cSStefan Haberland struct dasd_device *dev, *n; 5060b179b037SStefan Haberland unsigned long paths = 0; 5061b179b037SStefan Haberland int tbcpm; 50625db8440cSStefan Haberland 50635db8440cSStefan Haberland /* 50645db8440cSStefan Haberland * the path may have been added through a generic path event before 50655db8440cSStefan Haberland * only trigger path verification if the path is not already in use 50665db8440cSStefan Haberland */ 50675db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 50685db8440cSStefan Haberland &private->lcu->active_devices, 50695db8440cSStefan Haberland alias_list) { 5070b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 5071b179b037SStefan Haberland paths |= tbcpm; 5072b179b037SStefan Haberland if (!(dev->path_data.opm & tbcpm)) { 5073b179b037SStefan Haberland dev->path_data.tbvpm |= tbcpm; 50745db8440cSStefan Haberland dasd_schedule_device_bh(dev); 50755db8440cSStefan Haberland } 50765db8440cSStefan Haberland } 50775db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 50785db8440cSStefan Haberland &private->lcu->inactive_devices, 50795db8440cSStefan Haberland alias_list) { 5080b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 5081b179b037SStefan Haberland paths |= tbcpm; 5082b179b037SStefan Haberland if (!(dev->path_data.opm & tbcpm)) { 5083b179b037SStefan Haberland dev->path_data.tbvpm |= tbcpm; 50845db8440cSStefan Haberland dasd_schedule_device_bh(dev); 50855db8440cSStefan Haberland } 50865db8440cSStefan Haberland } 50875db8440cSStefan Haberland /* devices in PAV groups */ 50885db8440cSStefan Haberland list_for_each_entry_safe(pavgroup, tempgroup, 50895db8440cSStefan Haberland &private->lcu->grouplist, 50905db8440cSStefan Haberland group) { 50915db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 50925db8440cSStefan Haberland &pavgroup->baselist, 50935db8440cSStefan Haberland alias_list) { 5094b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 5095b179b037SStefan Haberland paths |= tbcpm; 5096b179b037SStefan Haberland if (!(dev->path_data.opm & tbcpm)) { 5097b179b037SStefan Haberland dev->path_data.tbvpm |= tbcpm; 50985db8440cSStefan Haberland dasd_schedule_device_bh(dev); 50995db8440cSStefan Haberland } 51005db8440cSStefan Haberland } 51015db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 51025db8440cSStefan Haberland &pavgroup->aliaslist, 51035db8440cSStefan Haberland alias_list) { 5104b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 5105b179b037SStefan Haberland paths |= tbcpm; 5106b179b037SStefan Haberland if (!(dev->path_data.opm & tbcpm)) { 5107b179b037SStefan Haberland dev->path_data.tbvpm |= tbcpm; 51085db8440cSStefan Haberland dasd_schedule_device_bh(dev); 51095db8440cSStefan Haberland } 51105db8440cSStefan Haberland } 51115db8440cSStefan Haberland } 5112b179b037SStefan Haberland /* notify user about all paths affected by CUIR action */ 5113b179b037SStefan Haberland dasd_eckd_cuir_notify_user(device, paths, sch_id, CUIR_RESUME); 5114b179b037SStefan Haberland return 0; 51155db8440cSStefan Haberland } 51165db8440cSStefan Haberland 51175db8440cSStefan Haberland static void dasd_eckd_handle_cuir(struct dasd_device *device, void *messages, 51185db8440cSStefan Haberland __u8 lpum) 51195db8440cSStefan Haberland { 51205db8440cSStefan Haberland struct dasd_cuir_message *cuir = messages; 51215db8440cSStefan Haberland struct channel_path_desc *desc; 51225db8440cSStefan Haberland struct subchannel_id sch_id; 51235db8440cSStefan Haberland int pos, response; 51245db8440cSStefan Haberland 5125b179b037SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, 5126b179b037SStefan Haberland "CUIR request: %016llx %016llx %016llx %08x", 5127b179b037SStefan Haberland ((u64 *)cuir)[0], ((u64 *)cuir)[1], ((u64 *)cuir)[2], 5128b179b037SStefan Haberland ((u32 *)cuir)[3]); 5129b179b037SStefan Haberland ccw_device_get_schid(device->cdev, &sch_id); 51309d49f86dSSebastian Ott pos = pathmask_to_pos(lpum); 51315db8440cSStefan Haberland desc = ccw_device_get_chp_desc(device->cdev, pos); 51325db8440cSStefan Haberland 51335db8440cSStefan Haberland if (cuir->code == CUIR_QUIESCE) { 51345db8440cSStefan Haberland /* quiesce */ 5135b179b037SStefan Haberland if (dasd_eckd_cuir_quiesce(device, lpum, sch_id, cuir)) 5136b179b037SStefan Haberland response = PSF_CUIR_LAST_PATH; 5137b179b037SStefan Haberland else 5138b179b037SStefan Haberland response = PSF_CUIR_COMPLETED; 51395db8440cSStefan Haberland } else if (cuir->code == CUIR_RESUME) { 51405db8440cSStefan Haberland /* resume */ 5141b179b037SStefan Haberland dasd_eckd_cuir_resume(device, lpum, sch_id, cuir); 5142b179b037SStefan Haberland response = PSF_CUIR_COMPLETED; 51435db8440cSStefan Haberland } else 51445db8440cSStefan Haberland response = PSF_CUIR_NOT_SUPPORTED; 51455db8440cSStefan Haberland 5146b179b037SStefan Haberland dasd_eckd_psf_cuir_response(device, response, 5147b179b037SStefan Haberland cuir->message_id, desc, sch_id); 5148b179b037SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, 5149b179b037SStefan Haberland "CUIR response: %d on message ID %08x", response, 5150b179b037SStefan Haberland cuir->message_id); 51515db8440cSStefan Haberland /* free descriptor copy */ 51525db8440cSStefan Haberland kfree(desc); 5153b179b037SStefan Haberland /* to make sure there is no attention left schedule work again */ 5154b179b037SStefan Haberland device->discipline->check_attention(device, lpum); 51555db8440cSStefan Haberland } 51565db8440cSStefan Haberland 51575db8440cSStefan Haberland static void dasd_eckd_check_attention_work(struct work_struct *work) 51585db8440cSStefan Haberland { 51595db8440cSStefan Haberland struct check_attention_work_data *data; 51605db8440cSStefan Haberland struct dasd_rssd_messages *messages; 51615db8440cSStefan Haberland struct dasd_device *device; 51625db8440cSStefan Haberland int rc; 51635db8440cSStefan Haberland 51645db8440cSStefan Haberland data = container_of(work, struct check_attention_work_data, worker); 51655db8440cSStefan Haberland device = data->device; 51665db8440cSStefan Haberland messages = kzalloc(sizeof(*messages), GFP_KERNEL); 51675db8440cSStefan Haberland if (!messages) { 51685db8440cSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 51695db8440cSStefan Haberland "Could not allocate attention message buffer"); 51705db8440cSStefan Haberland goto out; 51715db8440cSStefan Haberland } 51725db8440cSStefan Haberland rc = dasd_eckd_read_message_buffer(device, messages, data->lpum); 51735db8440cSStefan Haberland if (rc) 51745db8440cSStefan Haberland goto out; 51755db8440cSStefan Haberland if (messages->length == ATTENTION_LENGTH_CUIR && 51765db8440cSStefan Haberland messages->format == ATTENTION_FORMAT_CUIR) 51775db8440cSStefan Haberland dasd_eckd_handle_cuir(device, messages, data->lpum); 51785db8440cSStefan Haberland out: 51795db8440cSStefan Haberland dasd_put_device(device); 51805db8440cSStefan Haberland kfree(messages); 51815db8440cSStefan Haberland kfree(data); 51825db8440cSStefan Haberland } 51835db8440cSStefan Haberland 51845db8440cSStefan Haberland static int dasd_eckd_check_attention(struct dasd_device *device, __u8 lpum) 51855db8440cSStefan Haberland { 51865db8440cSStefan Haberland struct check_attention_work_data *data; 51875db8440cSStefan Haberland 51885db8440cSStefan Haberland data = kzalloc(sizeof(*data), GFP_ATOMIC); 51895db8440cSStefan Haberland if (!data) 51905db8440cSStefan Haberland return -ENOMEM; 51915db8440cSStefan Haberland INIT_WORK(&data->worker, dasd_eckd_check_attention_work); 51925db8440cSStefan Haberland dasd_get_device(device); 51935db8440cSStefan Haberland data->device = device; 51945db8440cSStefan Haberland data->lpum = lpum; 51955db8440cSStefan Haberland schedule_work(&data->worker); 51965db8440cSStefan Haberland return 0; 51975db8440cSStefan Haberland } 51985db8440cSStefan Haberland 5199d41dd122SStefan Haberland static struct ccw_driver dasd_eckd_driver = { 52003bda058bSSebastian Ott .driver = { 5201d41dd122SStefan Haberland .name = "dasd-eckd", 5202d41dd122SStefan Haberland .owner = THIS_MODULE, 52033bda058bSSebastian Ott }, 5204d41dd122SStefan Haberland .ids = dasd_eckd_ids, 5205d41dd122SStefan Haberland .probe = dasd_eckd_probe, 5206d41dd122SStefan Haberland .remove = dasd_generic_remove, 5207d41dd122SStefan Haberland .set_offline = dasd_generic_set_offline, 5208d41dd122SStefan Haberland .set_online = dasd_eckd_set_online, 5209d41dd122SStefan Haberland .notify = dasd_generic_notify, 5210a4d26c6aSStefan Weinhuber .path_event = dasd_generic_path_event, 52114679e893SStefan Haberland .shutdown = dasd_generic_shutdown, 5212d41dd122SStefan Haberland .freeze = dasd_generic_pm_freeze, 5213d41dd122SStefan Haberland .thaw = dasd_generic_restore_device, 5214d41dd122SStefan Haberland .restore = dasd_generic_restore_device, 5215a23ed009SStefan Haberland .uc_handler = dasd_generic_uc_handler, 5216420f42ecSHeiko Carstens .int_class = IRQIO_DAS, 5217d41dd122SStefan Haberland }; 5218f3eb5384SStefan Weinhuber 52191da177e4SLinus Torvalds /* 52201da177e4SLinus Torvalds * max_blocks is dependent on the amount of storage that is available 52211da177e4SLinus Torvalds * in the static io buffer for each device. Currently each device has 52221da177e4SLinus Torvalds * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has 52231da177e4SLinus Torvalds * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use 52241da177e4SLinus Torvalds * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In 52251da177e4SLinus Torvalds * addition we have one define extent ccw + 16 bytes of data and one 52261da177e4SLinus Torvalds * locate record ccw + 16 bytes of data. That makes: 52271da177e4SLinus Torvalds * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. 52281da177e4SLinus Torvalds * We want to fit two into the available memory so that we can immediately 52291da177e4SLinus Torvalds * start the next request if one finishes off. That makes 249.5 blocks 52301da177e4SLinus Torvalds * for one request. Give a little safety and the result is 240. 52311da177e4SLinus Torvalds */ 52321da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline = { 52331da177e4SLinus Torvalds .owner = THIS_MODULE, 52341da177e4SLinus Torvalds .name = "ECKD", 52351da177e4SLinus Torvalds .ebcname = "ECKD", 5236ef19298bSStefan Weinhuber .max_blocks = 190, 52371da177e4SLinus Torvalds .check_device = dasd_eckd_check_characteristics, 52388e09f215SStefan Weinhuber .uncheck_device = dasd_eckd_uncheck_device, 52391da177e4SLinus Torvalds .do_analysis = dasd_eckd_do_analysis, 5240a4d26c6aSStefan Weinhuber .verify_path = dasd_eckd_verify_path, 5241d42e1712SStefan Haberland .basic_to_ready = dasd_eckd_basic_to_ready, 52428e09f215SStefan Weinhuber .online_to_ready = dasd_eckd_online_to_ready, 5243daa991bfSStefan Haberland .basic_to_known = dasd_eckd_basic_to_known, 52441da177e4SLinus Torvalds .fill_geometry = dasd_eckd_fill_geometry, 52451da177e4SLinus Torvalds .start_IO = dasd_start_IO, 52461da177e4SLinus Torvalds .term_IO = dasd_term_IO, 52478e09f215SStefan Weinhuber .handle_terminated_request = dasd_eckd_handle_terminated_request, 52481da177e4SLinus Torvalds .format_device = dasd_eckd_format_device, 52491da177e4SLinus Torvalds .erp_action = dasd_eckd_erp_action, 52501da177e4SLinus Torvalds .erp_postaction = dasd_eckd_erp_postaction, 52515a27e60dSStefan Weinhuber .check_for_device_change = dasd_eckd_check_for_device_change, 52528e09f215SStefan Weinhuber .build_cp = dasd_eckd_build_alias_cp, 52538e09f215SStefan Weinhuber .free_cp = dasd_eckd_free_alias_cp, 52541da177e4SLinus Torvalds .dump_sense = dasd_eckd_dump_sense, 5255fc19f381SStefan Haberland .dump_sense_dbf = dasd_eckd_dump_sense_dbf, 52561da177e4SLinus Torvalds .fill_info = dasd_eckd_fill_info, 52571107ccfbSChristoph Hellwig .ioctl = dasd_eckd_ioctl, 5258d41dd122SStefan Haberland .freeze = dasd_eckd_pm_freeze, 5259d41dd122SStefan Haberland .restore = dasd_eckd_restore_device, 5260501183f2SStefan Haberland .reload = dasd_eckd_reload_device, 52612dedf0d9SStefan Haberland .get_uid = dasd_eckd_get_uid, 5262f1633031SStefan Haberland .kick_validate = dasd_eckd_kick_validate_server, 52635db8440cSStefan Haberland .check_attention = dasd_eckd_check_attention, 52645a3b7b11SStefan Haberland .host_access_count = dasd_eckd_host_access_count, 52655a3b7b11SStefan Haberland .hosts_print = dasd_hosts_print, 52661da177e4SLinus Torvalds }; 52671da177e4SLinus Torvalds 52681da177e4SLinus Torvalds static int __init 52691da177e4SLinus Torvalds dasd_eckd_init(void) 52701da177e4SLinus Torvalds { 5271736e6ea0SSebastian Ott int ret; 5272736e6ea0SSebastian Ott 52731da177e4SLinus Torvalds ASCEBC(dasd_eckd_discipline.ebcname, 4); 5274f932bceaSStefan Weinhuber dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), 5275f932bceaSStefan Weinhuber GFP_KERNEL | GFP_DMA); 5276f932bceaSStefan Weinhuber if (!dasd_reserve_req) 5277f932bceaSStefan Weinhuber return -ENOMEM; 5278a4d26c6aSStefan Weinhuber path_verification_worker = kmalloc(sizeof(*path_verification_worker), 5279a4d26c6aSStefan Weinhuber GFP_KERNEL | GFP_DMA); 5280a4d26c6aSStefan Weinhuber if (!path_verification_worker) { 5281a4d26c6aSStefan Weinhuber kfree(dasd_reserve_req); 5282a4d26c6aSStefan Weinhuber return -ENOMEM; 5283a4d26c6aSStefan Weinhuber } 5284558b9ef0SStefan Weinhuber rawpadpage = (void *)__get_free_page(GFP_KERNEL); 5285558b9ef0SStefan Weinhuber if (!rawpadpage) { 5286558b9ef0SStefan Weinhuber kfree(path_verification_worker); 5287558b9ef0SStefan Weinhuber kfree(dasd_reserve_req); 5288558b9ef0SStefan Weinhuber return -ENOMEM; 5289558b9ef0SStefan Weinhuber } 5290736e6ea0SSebastian Ott ret = ccw_driver_register(&dasd_eckd_driver); 5291736e6ea0SSebastian Ott if (!ret) 5292736e6ea0SSebastian Ott wait_for_device_probe(); 5293a4d26c6aSStefan Weinhuber else { 5294a4d26c6aSStefan Weinhuber kfree(path_verification_worker); 5295f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 5296558b9ef0SStefan Weinhuber free_page((unsigned long)rawpadpage); 5297a4d26c6aSStefan Weinhuber } 5298736e6ea0SSebastian Ott return ret; 52991da177e4SLinus Torvalds } 53001da177e4SLinus Torvalds 53011da177e4SLinus Torvalds static void __exit 53021da177e4SLinus Torvalds dasd_eckd_cleanup(void) 53031da177e4SLinus Torvalds { 53041da177e4SLinus Torvalds ccw_driver_unregister(&dasd_eckd_driver); 5305a4d26c6aSStefan Weinhuber kfree(path_verification_worker); 5306f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 5307558b9ef0SStefan Weinhuber free_page((unsigned long)rawpadpage); 53081da177e4SLinus Torvalds } 53091da177e4SLinus Torvalds 53101da177e4SLinus Torvalds module_init(dasd_eckd_init); 53111da177e4SLinus Torvalds module_exit(dasd_eckd_cleanup); 5312