11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> 31da177e4SLinus Torvalds * Horst Hummel <Horst.Hummel@de.ibm.com> 41da177e4SLinus Torvalds * Carsten Otte <Cotte@de.ibm.com> 51da177e4SLinus Torvalds * Martin Schwidefsky <schwidefsky@de.ibm.com> 61da177e4SLinus Torvalds * Bugreports.to..: <Linux390@de.ibm.com> 7d41dd122SStefan Haberland * Copyright IBM Corp. 1999, 2009 8ab1d848fSNigel Hislop * EMC Symmetrix ioctl Copyright EMC Corporation, 2008 9ab1d848fSNigel Hislop * Author.........: Nigel Hislop <hislop_nigel@emc.com> 101da177e4SLinus Torvalds */ 111da177e4SLinus Torvalds 12ca99dab0SStefan Haberland #define KMSG_COMPONENT "dasd-eckd" 13fc19f381SStefan Haberland 141da177e4SLinus Torvalds #include <linux/stddef.h> 151da177e4SLinus Torvalds #include <linux/kernel.h> 161da177e4SLinus Torvalds #include <linux/slab.h> 171da177e4SLinus Torvalds #include <linux/hdreg.h> /* HDIO_GETGEO */ 181da177e4SLinus Torvalds #include <linux/bio.h> 191da177e4SLinus Torvalds #include <linux/module.h> 20048cd4e5SHeiko Carstens #include <linux/compat.h> 211da177e4SLinus Torvalds #include <linux/init.h> 225a3b7b11SStefan Haberland #include <linux/seq_file.h> 231da177e4SLinus Torvalds 24382b7366SSebastian Ott #include <asm/css_chars.h> 251da177e4SLinus Torvalds #include <asm/debug.h> 261da177e4SLinus Torvalds #include <asm/idals.h> 271da177e4SLinus Torvalds #include <asm/ebcdic.h> 281da177e4SLinus Torvalds #include <asm/io.h> 297c0f6ba6SLinus Torvalds #include <linux/uaccess.h> 3040545573SHorst Hummel #include <asm/cio.h> 311da177e4SLinus Torvalds #include <asm/ccwdev.h> 32f3eb5384SStefan Weinhuber #include <asm/itcw.h> 335db8440cSStefan Haberland #include <asm/schid.h> 345db8440cSStefan Haberland #include <asm/chpid.h> 351da177e4SLinus Torvalds 361da177e4SLinus Torvalds #include "dasd_int.h" 371da177e4SLinus Torvalds #include "dasd_eckd.h" 381da177e4SLinus Torvalds 391da177e4SLinus Torvalds #ifdef PRINTK_HEADER 401da177e4SLinus Torvalds #undef PRINTK_HEADER 411da177e4SLinus Torvalds #endif /* PRINTK_HEADER */ 421da177e4SLinus Torvalds #define PRINTK_HEADER "dasd(eckd):" 431da177e4SLinus Torvalds 441da177e4SLinus Torvalds #define ECKD_C0(i) (i->home_bytes) 451da177e4SLinus Torvalds #define ECKD_F(i) (i->formula) 461da177e4SLinus Torvalds #define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\ 471da177e4SLinus Torvalds (i->factors.f_0x02.f1)) 481da177e4SLinus Torvalds #define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\ 491da177e4SLinus Torvalds (i->factors.f_0x02.f2)) 501da177e4SLinus Torvalds #define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\ 511da177e4SLinus Torvalds (i->factors.f_0x02.f3)) 521da177e4SLinus Torvalds #define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0) 531da177e4SLinus Torvalds #define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0) 541da177e4SLinus Torvalds #define ECKD_F6(i) (i->factor6) 551da177e4SLinus Torvalds #define ECKD_F7(i) (i->factor7) 561da177e4SLinus Torvalds #define ECKD_F8(i) (i->factor8) 571da177e4SLinus Torvalds 58e4dbb0f2SStefan Haberland /* 59e4dbb0f2SStefan Haberland * raw track access always map to 64k in memory 60e4dbb0f2SStefan Haberland * so it maps to 16 blocks of 4k per track 61e4dbb0f2SStefan Haberland */ 62e4dbb0f2SStefan Haberland #define DASD_RAW_BLOCK_PER_TRACK 16 63e4dbb0f2SStefan Haberland #define DASD_RAW_BLOCKSIZE 4096 64e4dbb0f2SStefan Haberland /* 64k are 128 x 512 byte sectors */ 65e4dbb0f2SStefan Haberland #define DASD_RAW_SECTORS_PER_TRACK 128 66e4dbb0f2SStefan Haberland 671da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 681da177e4SLinus Torvalds 691da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline; 701da177e4SLinus Torvalds 711da177e4SLinus Torvalds /* The ccw bus type uses this table to find devices that it sends to 721da177e4SLinus Torvalds * dasd_eckd_probe */ 731da177e4SLinus Torvalds static struct ccw_device_id dasd_eckd_ids[] = { 74d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1}, 75d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2}, 765da24b76SStefan Haberland { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3380, 0), .driver_info = 0x3}, 77d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4}, 78d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5}, 79d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6}, 80d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7}, 81d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8}, 82d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9}, 83d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa}, 841da177e4SLinus Torvalds { /* end of list */ }, 851da177e4SLinus Torvalds }; 861da177e4SLinus Torvalds 871da177e4SLinus Torvalds MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids); 881da177e4SLinus Torvalds 891da177e4SLinus Torvalds static struct ccw_driver dasd_eckd_driver; /* see below */ 901da177e4SLinus Torvalds 91558b9ef0SStefan Weinhuber static void *rawpadpage; 92558b9ef0SStefan Weinhuber 93eb6e199bSStefan Weinhuber #define INIT_CQR_OK 0 94eb6e199bSStefan Weinhuber #define INIT_CQR_UNFORMATTED 1 95eb6e199bSStefan Weinhuber #define INIT_CQR_ERROR 2 96eb6e199bSStefan Weinhuber 97f932bceaSStefan Weinhuber /* emergency request for reserve/release */ 98f932bceaSStefan Weinhuber static struct { 99f932bceaSStefan Weinhuber struct dasd_ccw_req cqr; 100f932bceaSStefan Weinhuber struct ccw1 ccw; 101f932bceaSStefan Weinhuber char data[32]; 102f932bceaSStefan Weinhuber } *dasd_reserve_req; 103f932bceaSStefan Weinhuber static DEFINE_MUTEX(dasd_reserve_mutex); 104f932bceaSStefan Weinhuber 105a4d26c6aSStefan Weinhuber /* definitions for the path verification worker */ 106a4d26c6aSStefan Weinhuber struct path_verification_work_data { 107a4d26c6aSStefan Weinhuber struct work_struct worker; 108a4d26c6aSStefan Weinhuber struct dasd_device *device; 109a4d26c6aSStefan Weinhuber struct dasd_ccw_req cqr; 110a4d26c6aSStefan Weinhuber struct ccw1 ccw; 111a4d26c6aSStefan Weinhuber __u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE]; 112a4d26c6aSStefan Weinhuber int isglobal; 113a4d26c6aSStefan Weinhuber __u8 tbvpm; 114a4d26c6aSStefan Weinhuber }; 115a4d26c6aSStefan Weinhuber static struct path_verification_work_data *path_verification_worker; 116a4d26c6aSStefan Weinhuber static DEFINE_MUTEX(dasd_path_verification_mutex); 117eb6e199bSStefan Weinhuber 1185db8440cSStefan Haberland struct check_attention_work_data { 1195db8440cSStefan Haberland struct work_struct worker; 1205db8440cSStefan Haberland struct dasd_device *device; 1215db8440cSStefan Haberland __u8 lpum; 1225db8440cSStefan Haberland }; 1235db8440cSStefan Haberland 1248fd57520SJan Höppner static int prepare_itcw(struct itcw *, unsigned int, unsigned int, int, 1258fd57520SJan Höppner struct dasd_device *, struct dasd_device *, 1268fd57520SJan Höppner unsigned int, int, unsigned int, unsigned int, 1278fd57520SJan Höppner unsigned int, unsigned int); 1288fd57520SJan Höppner 1291da177e4SLinus Torvalds /* initial attempt at a probe function. this can be simplified once 1301da177e4SLinus Torvalds * the other detection code is gone */ 1311da177e4SLinus Torvalds static int 1321da177e4SLinus Torvalds dasd_eckd_probe (struct ccw_device *cdev) 1331da177e4SLinus Torvalds { 1341da177e4SLinus Torvalds int ret; 1351da177e4SLinus Torvalds 13640545573SHorst Hummel /* set ECKD specific ccw-device options */ 137454e1fa1SPeter Oberparleiter ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE | 138454e1fa1SPeter Oberparleiter CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH); 13940545573SHorst Hummel if (ret) { 140b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s", 141b8ed5dd5SStefan Haberland "dasd_eckd_probe: could not set " 142b8ed5dd5SStefan Haberland "ccw-device options"); 1431da177e4SLinus Torvalds return ret; 14440545573SHorst Hummel } 14540545573SHorst Hummel ret = dasd_generic_probe(cdev, &dasd_eckd_discipline); 14640545573SHorst Hummel return ret; 1471da177e4SLinus Torvalds } 1481da177e4SLinus Torvalds 1491da177e4SLinus Torvalds static int 1501da177e4SLinus Torvalds dasd_eckd_set_online(struct ccw_device *cdev) 1511da177e4SLinus Torvalds { 1521da177e4SLinus Torvalds return dasd_generic_set_online(cdev, &dasd_eckd_discipline); 1531da177e4SLinus Torvalds } 1541da177e4SLinus Torvalds 1551da177e4SLinus Torvalds static const int sizes_trk0[] = { 28, 148, 84 }; 1561da177e4SLinus Torvalds #define LABEL_SIZE 140 1571da177e4SLinus Torvalds 1583bc9fef9SStefan Haberland /* head and record addresses of count_area read in analysis ccw */ 1593bc9fef9SStefan Haberland static const int count_area_head[] = { 0, 0, 0, 0, 2 }; 1603bc9fef9SStefan Haberland static const int count_area_rec[] = { 1, 2, 3, 4, 1 }; 1613bc9fef9SStefan Haberland 1621da177e4SLinus Torvalds static inline unsigned int 1631da177e4SLinus Torvalds round_up_multiple(unsigned int no, unsigned int mult) 1641da177e4SLinus Torvalds { 1651da177e4SLinus Torvalds int rem = no % mult; 1661da177e4SLinus Torvalds return (rem ? no - rem + mult : no); 1671da177e4SLinus Torvalds } 1681da177e4SLinus Torvalds 1691da177e4SLinus Torvalds static inline unsigned int 1701da177e4SLinus Torvalds ceil_quot(unsigned int d1, unsigned int d2) 1711da177e4SLinus Torvalds { 1721da177e4SLinus Torvalds return (d1 + (d2 - 1)) / d2; 1731da177e4SLinus Torvalds } 1741da177e4SLinus Torvalds 1754d284cacSHeiko Carstens static unsigned int 1761da177e4SLinus Torvalds recs_per_track(struct dasd_eckd_characteristics * rdc, 1771da177e4SLinus Torvalds unsigned int kl, unsigned int dl) 1781da177e4SLinus Torvalds { 1791da177e4SLinus Torvalds int dn, kn; 1801da177e4SLinus Torvalds 1811da177e4SLinus Torvalds switch (rdc->dev_type) { 1821da177e4SLinus Torvalds case 0x3380: 1831da177e4SLinus Torvalds if (kl) 1841da177e4SLinus Torvalds return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + 1851da177e4SLinus Torvalds ceil_quot(dl + 12, 32)); 1861da177e4SLinus Torvalds else 1871da177e4SLinus Torvalds return 1499 / (15 + ceil_quot(dl + 12, 32)); 1881da177e4SLinus Torvalds case 0x3390: 1891da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1901da177e4SLinus Torvalds if (kl) { 1911da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1921da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + 1931da177e4SLinus Torvalds 9 + ceil_quot(dl + 6 * dn, 34)); 1941da177e4SLinus Torvalds } else 1951da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); 1961da177e4SLinus Torvalds case 0x9345: 1971da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1981da177e4SLinus Torvalds if (kl) { 1991da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 2001da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + 2011da177e4SLinus Torvalds ceil_quot(dl + 6 * dn, 34)); 2021da177e4SLinus Torvalds } else 2031da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); 2041da177e4SLinus Torvalds } 2051da177e4SLinus Torvalds return 0; 2061da177e4SLinus Torvalds } 2071da177e4SLinus Torvalds 208b44b0ab3SStefan Weinhuber static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head) 209b44b0ab3SStefan Weinhuber { 210b44b0ab3SStefan Weinhuber geo->cyl = (__u16) cyl; 211b44b0ab3SStefan Weinhuber geo->head = cyl >> 16; 212b44b0ab3SStefan Weinhuber geo->head <<= 4; 213b44b0ab3SStefan Weinhuber geo->head |= head; 214b44b0ab3SStefan Weinhuber } 215b44b0ab3SStefan Weinhuber 21645f186beSJan Höppner static int check_XRC(struct ccw1 *ccw, struct DE_eckd_data *data, 2171da177e4SLinus Torvalds struct dasd_device *device) 2181da177e4SLinus Torvalds { 219543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 220d54853efSMartin Schwidefsky int rc; 2211da177e4SLinus Torvalds 222d54853efSMartin Schwidefsky if (!private->rdc_data.facilities.XRC_supported) 223d54853efSMartin Schwidefsky return 0; 2241da177e4SLinus Torvalds 2251da177e4SLinus Torvalds /* switch on System Time Stamp - needed for XRC Support */ 2261da177e4SLinus Torvalds data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ 2271da177e4SLinus Torvalds data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ 2281da177e4SLinus Torvalds 22940277891SMartin Schwidefsky rc = get_phys_clock(&data->ep_sys_time); 230d54853efSMartin Schwidefsky /* Ignore return code if sync clock is switched off. */ 231a8f6db4dSHeiko Carstens if (rc == -EOPNOTSUPP || rc == -EACCES) 232d54853efSMartin Schwidefsky rc = 0; 2331da177e4SLinus Torvalds 23445f186beSJan Höppner if (ccw) { 23545f186beSJan Höppner ccw->count = sizeof(struct DE_eckd_data); 23645f186beSJan Höppner ccw->flags |= CCW_FLAG_SLI; 23745f186beSJan Höppner } 23845f186beSJan Höppner 239d54853efSMartin Schwidefsky return rc; 2401da177e4SLinus Torvalds } 2411da177e4SLinus Torvalds 2424d284cacSHeiko Carstens static int 243b44b0ab3SStefan Weinhuber define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk, 24445f186beSJan Höppner unsigned int totrk, int cmd, struct dasd_device *device, 24545f186beSJan Höppner int blksize) 2461da177e4SLinus Torvalds { 247543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 248b44b0ab3SStefan Weinhuber u16 heads, beghead, endhead; 24945f186beSJan Höppner u32 begcyl, endcyl; 250d54853efSMartin Schwidefsky int rc = 0; 2511da177e4SLinus Torvalds 25245f186beSJan Höppner if (ccw) { 2531da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; 2541da177e4SLinus Torvalds ccw->flags = 0; 2551da177e4SLinus Torvalds ccw->count = 16; 2561da177e4SLinus Torvalds ccw->cda = (__u32)__pa(data); 25745f186beSJan Höppner } 2581da177e4SLinus Torvalds 2591da177e4SLinus Torvalds memset(data, 0, sizeof(struct DE_eckd_data)); 2601da177e4SLinus Torvalds switch (cmd) { 2611da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 2621da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 2631da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 2641da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 2651da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 2661da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 2671da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 2681da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 2691da177e4SLinus Torvalds data->mask.perm = 0x1; 2701da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 2711da177e4SLinus Torvalds break; 2728fd57520SJan Höppner case DASD_ECKD_CCW_READ_COUNT: 2738fd57520SJan Höppner data->mask.perm = 0x1; 2748fd57520SJan Höppner data->attributes.operation = DASD_BYPASS_CACHE; 2758fd57520SJan Höppner break; 27645f186beSJan Höppner case DASD_ECKD_CCW_READ_TRACK: 27745f186beSJan Höppner case DASD_ECKD_CCW_READ_TRACK_DATA: 27845f186beSJan Höppner data->mask.perm = 0x1; 27945f186beSJan Höppner data->attributes.operation = private->attrib.operation; 28045f186beSJan Höppner data->blk_size = 0; 28145f186beSJan Höppner break; 2821da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 2831da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 2841da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 2851da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 2861da177e4SLinus Torvalds data->mask.perm = 0x02; 2871da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 288d54853efSMartin Schwidefsky rc = check_XRC(ccw, data, device); 2891da177e4SLinus Torvalds break; 2901da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 2911da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 2921da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 293d54853efSMartin Schwidefsky rc = check_XRC(ccw, data, device); 2941da177e4SLinus Torvalds break; 2951da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 2961da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 2971da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 2981da177e4SLinus Torvalds data->mask.perm = 0x3; 2991da177e4SLinus Torvalds data->mask.auth = 0x1; 3001da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 301d54853efSMartin Schwidefsky rc = check_XRC(ccw, data, device); 3021da177e4SLinus Torvalds break; 30345f186beSJan Höppner case DASD_ECKD_CCW_WRITE_FULL_TRACK: 30445f186beSJan Höppner data->mask.perm = 0x03; 30545f186beSJan Höppner data->attributes.operation = private->attrib.operation; 30645f186beSJan Höppner data->blk_size = 0; 30745f186beSJan Höppner break; 30845f186beSJan Höppner case DASD_ECKD_CCW_WRITE_TRACK_DATA: 30945f186beSJan Höppner data->mask.perm = 0x02; 31045f186beSJan Höppner data->attributes.operation = private->attrib.operation; 31145f186beSJan Höppner data->blk_size = blksize; 31245f186beSJan Höppner rc = check_XRC(ccw, data, device); 31345f186beSJan Höppner break; 3141da177e4SLinus Torvalds default: 315fc19f381SStefan Haberland dev_err(&device->cdev->dev, 316fc19f381SStefan Haberland "0x%x is not a known command\n", cmd); 3171da177e4SLinus Torvalds break; 3181da177e4SLinus Torvalds } 3191da177e4SLinus Torvalds 3201da177e4SLinus Torvalds data->attributes.mode = 0x3; /* ECKD */ 3211da177e4SLinus Torvalds 3221da177e4SLinus Torvalds if ((private->rdc_data.cu_type == 0x2105 || 3231da177e4SLinus Torvalds private->rdc_data.cu_type == 0x2107 || 3241da177e4SLinus Torvalds private->rdc_data.cu_type == 0x1750) 3251da177e4SLinus Torvalds && !(private->uses_cdl && trk < 2)) 3261da177e4SLinus Torvalds data->ga_extended |= 0x40; /* Regular Data Format Mode */ 3271da177e4SLinus Torvalds 328b44b0ab3SStefan Weinhuber heads = private->rdc_data.trk_per_cyl; 329b44b0ab3SStefan Weinhuber begcyl = trk / heads; 330b44b0ab3SStefan Weinhuber beghead = trk % heads; 331b44b0ab3SStefan Weinhuber endcyl = totrk / heads; 332b44b0ab3SStefan Weinhuber endhead = totrk % heads; 3331da177e4SLinus Torvalds 3341da177e4SLinus Torvalds /* check for sequential prestage - enhance cylinder range */ 3351da177e4SLinus Torvalds if (data->attributes.operation == DASD_SEQ_PRESTAGE || 3361da177e4SLinus Torvalds data->attributes.operation == DASD_SEQ_ACCESS) { 3371da177e4SLinus Torvalds 338b44b0ab3SStefan Weinhuber if (endcyl + private->attrib.nr_cyl < private->real_cyl) 339b44b0ab3SStefan Weinhuber endcyl += private->attrib.nr_cyl; 3401da177e4SLinus Torvalds else 341b44b0ab3SStefan Weinhuber endcyl = (private->real_cyl - 1); 3421da177e4SLinus Torvalds } 3431da177e4SLinus Torvalds 344b44b0ab3SStefan Weinhuber set_ch_t(&data->beg_ext, begcyl, beghead); 345b44b0ab3SStefan Weinhuber set_ch_t(&data->end_ext, endcyl, endhead); 346d54853efSMartin Schwidefsky return rc; 3471da177e4SLinus Torvalds } 3481da177e4SLinus Torvalds 3498e09f215SStefan Weinhuber 35045f186beSJan Höppner static void locate_record_ext(struct ccw1 *ccw, struct LRE_eckd_data *data, 35145f186beSJan Höppner unsigned int trk, unsigned int rec_on_trk, 35245f186beSJan Höppner int count, int cmd, struct dasd_device *device, 35345f186beSJan Höppner unsigned int reclen, unsigned int tlf) 354f3eb5384SStefan Weinhuber { 355543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 356f3eb5384SStefan Weinhuber int sector; 357f3eb5384SStefan Weinhuber int dn, d; 358f3eb5384SStefan Weinhuber 35945f186beSJan Höppner if (ccw) { 36045f186beSJan Höppner ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD_EXT; 36145f186beSJan Höppner ccw->flags = 0; 36245f186beSJan Höppner if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) 36345f186beSJan Höppner ccw->count = 22; 36445f186beSJan Höppner else 36545f186beSJan Höppner ccw->count = 20; 36645f186beSJan Höppner ccw->cda = (__u32)__pa(data); 36745f186beSJan Höppner } 36845f186beSJan Höppner 369f3eb5384SStefan Weinhuber memset(data, 0, sizeof(*data)); 370f3eb5384SStefan Weinhuber sector = 0; 371f3eb5384SStefan Weinhuber if (rec_on_trk) { 372f3eb5384SStefan Weinhuber switch (private->rdc_data.dev_type) { 373f3eb5384SStefan Weinhuber case 0x3390: 374f3eb5384SStefan Weinhuber dn = ceil_quot(reclen + 6, 232); 375f3eb5384SStefan Weinhuber d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 376f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 377f3eb5384SStefan Weinhuber break; 378f3eb5384SStefan Weinhuber case 0x3380: 379f3eb5384SStefan Weinhuber d = 7 + ceil_quot(reclen + 12, 32); 380f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 381f3eb5384SStefan Weinhuber break; 382f3eb5384SStefan Weinhuber } 383f3eb5384SStefan Weinhuber } 384f3eb5384SStefan Weinhuber data->sector = sector; 385f3eb5384SStefan Weinhuber /* note: meaning of count depends on the operation 386f3eb5384SStefan Weinhuber * for record based I/O it's the number of records, but for 387f3eb5384SStefan Weinhuber * track based I/O it's the number of tracks 388f3eb5384SStefan Weinhuber */ 389f3eb5384SStefan Weinhuber data->count = count; 390f3eb5384SStefan Weinhuber switch (cmd) { 391f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 392f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 393f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 394f3eb5384SStefan Weinhuber break; 395f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_HOME_ADDRESS: 396f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 397f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 398f3eb5384SStefan Weinhuber break; 399f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 400f3eb5384SStefan Weinhuber data->operation.orientation = 0x1; 401f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 402f3eb5384SStefan Weinhuber data->count++; 403f3eb5384SStefan Weinhuber break; 404f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_RECORD_ZERO: 405f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 406f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 407f3eb5384SStefan Weinhuber data->count++; 408f3eb5384SStefan Weinhuber break; 409f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE: 410f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_MT: 411f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD: 412f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD_MT: 413f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 414f3eb5384SStefan Weinhuber data->length = reclen; 415f3eb5384SStefan Weinhuber data->operation.operation = 0x01; 416f3eb5384SStefan Weinhuber break; 417f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD: 418f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD_MT: 419f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 420f3eb5384SStefan Weinhuber data->length = reclen; 421f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 422f3eb5384SStefan Weinhuber break; 423e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_WRITE_FULL_TRACK: 424e4dbb0f2SStefan Haberland data->operation.orientation = 0x0; 425e4dbb0f2SStefan Haberland data->operation.operation = 0x3F; 426e4dbb0f2SStefan Haberland data->extended_operation = 0x11; 427e4dbb0f2SStefan Haberland data->length = 0; 428e4dbb0f2SStefan Haberland data->extended_parameter_length = 0x02; 429e4dbb0f2SStefan Haberland if (data->count > 8) { 430e4dbb0f2SStefan Haberland data->extended_parameter[0] = 0xFF; 431e4dbb0f2SStefan Haberland data->extended_parameter[1] = 0xFF; 432e4dbb0f2SStefan Haberland data->extended_parameter[1] <<= (16 - count); 433e4dbb0f2SStefan Haberland } else { 434e4dbb0f2SStefan Haberland data->extended_parameter[0] = 0xFF; 435e4dbb0f2SStefan Haberland data->extended_parameter[0] <<= (8 - count); 436e4dbb0f2SStefan Haberland data->extended_parameter[1] = 0x00; 437e4dbb0f2SStefan Haberland } 438e4dbb0f2SStefan Haberland data->sector = 0xFF; 439e4dbb0f2SStefan Haberland break; 440f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 441f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 442f3eb5384SStefan Weinhuber data->length = reclen; /* not tlf, as one might think */ 443f3eb5384SStefan Weinhuber data->operation.operation = 0x3F; 444f3eb5384SStefan Weinhuber data->extended_operation = 0x23; 445f3eb5384SStefan Weinhuber break; 446f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ: 447f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_MT: 448f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_KD: 449f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_KD_MT: 450f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 451f3eb5384SStefan Weinhuber data->length = reclen; 452f3eb5384SStefan Weinhuber data->operation.operation = 0x06; 453f3eb5384SStefan Weinhuber break; 454f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD: 455f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD_MT: 456f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 457f3eb5384SStefan Weinhuber data->length = reclen; 458f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 459f3eb5384SStefan Weinhuber break; 460f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_COUNT: 461f3eb5384SStefan Weinhuber data->operation.operation = 0x06; 462f3eb5384SStefan Weinhuber break; 463e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_READ_TRACK: 464e4dbb0f2SStefan Haberland data->operation.orientation = 0x1; 465e4dbb0f2SStefan Haberland data->operation.operation = 0x0C; 466e4dbb0f2SStefan Haberland data->extended_parameter_length = 0; 467e4dbb0f2SStefan Haberland data->sector = 0xFF; 468e4dbb0f2SStefan Haberland break; 469f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 470f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 471f3eb5384SStefan Weinhuber data->length = tlf; 472f3eb5384SStefan Weinhuber data->operation.operation = 0x0C; 473f3eb5384SStefan Weinhuber break; 474f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_ERASE: 475f3eb5384SStefan Weinhuber data->length = reclen; 476f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 477f3eb5384SStefan Weinhuber data->operation.operation = 0x0b; 478f3eb5384SStefan Weinhuber break; 479f3eb5384SStefan Weinhuber default: 480f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, device, 481f3eb5384SStefan Weinhuber "fill LRE unknown opcode 0x%x", cmd); 482f3eb5384SStefan Weinhuber BUG(); 483f3eb5384SStefan Weinhuber } 484f3eb5384SStefan Weinhuber set_ch_t(&data->seek_addr, 485f3eb5384SStefan Weinhuber trk / private->rdc_data.trk_per_cyl, 486f3eb5384SStefan Weinhuber trk % private->rdc_data.trk_per_cyl); 487f3eb5384SStefan Weinhuber data->search_arg.cyl = data->seek_addr.cyl; 488f3eb5384SStefan Weinhuber data->search_arg.head = data->seek_addr.head; 489f3eb5384SStefan Weinhuber data->search_arg.record = rec_on_trk; 490f3eb5384SStefan Weinhuber } 491f3eb5384SStefan Weinhuber 492f3eb5384SStefan Weinhuber static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 493b44b0ab3SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 494f3eb5384SStefan Weinhuber struct dasd_device *basedev, struct dasd_device *startdev, 49545f186beSJan Höppner unsigned int format, unsigned int rec_on_trk, int count, 496f3eb5384SStefan Weinhuber unsigned int blksize, unsigned int tlf) 4978e09f215SStefan Weinhuber { 4988e09f215SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 499f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 50045f186beSJan Höppner struct DE_eckd_data *dedata; 5018e09f215SStefan Weinhuber int rc = 0; 5028e09f215SStefan Weinhuber 503543691a4SSebastian Ott basepriv = basedev->private; 504543691a4SSebastian Ott startpriv = startdev->private; 505f3eb5384SStefan Weinhuber dedata = &pfxdata->define_extent; 506f3eb5384SStefan Weinhuber lredata = &pfxdata->locate_record; 5078e09f215SStefan Weinhuber 5088e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PFX; 5098e09f215SStefan Weinhuber ccw->flags = 0; 510e4dbb0f2SStefan Haberland if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) { 511e4dbb0f2SStefan Haberland ccw->count = sizeof(*pfxdata) + 2; 512e4dbb0f2SStefan Haberland ccw->cda = (__u32) __pa(pfxdata); 513e4dbb0f2SStefan Haberland memset(pfxdata, 0, sizeof(*pfxdata) + 2); 514e4dbb0f2SStefan Haberland } else { 5158e09f215SStefan Weinhuber ccw->count = sizeof(*pfxdata); 5168e09f215SStefan Weinhuber ccw->cda = (__u32) __pa(pfxdata); 5178e09f215SStefan Weinhuber memset(pfxdata, 0, sizeof(*pfxdata)); 518e4dbb0f2SStefan Haberland } 519e4dbb0f2SStefan Haberland 5208e09f215SStefan Weinhuber /* prefix data */ 521f3eb5384SStefan Weinhuber if (format > 1) { 522f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 523f3eb5384SStefan Weinhuber "PFX LRE unknown format 0x%x", format); 524f3eb5384SStefan Weinhuber BUG(); 525f3eb5384SStefan Weinhuber return -EINVAL; 526f3eb5384SStefan Weinhuber } 527f3eb5384SStefan Weinhuber pfxdata->format = format; 5284abb08c2SStefan Weinhuber pfxdata->base_address = basepriv->ned->unit_addr; 5294abb08c2SStefan Weinhuber pfxdata->base_lss = basepriv->ned->ID; 530f3eb5384SStefan Weinhuber pfxdata->validity.define_extent = 1; 5318e09f215SStefan Weinhuber 5328e09f215SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 5338e09f215SStefan Weinhuber if (startpriv->uid.type != UA_BASE_DEVICE) { 5348e09f215SStefan Weinhuber pfxdata->validity.verify_base = 1; 5358e09f215SStefan Weinhuber if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 5368e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 1; 5378e09f215SStefan Weinhuber } 5388e09f215SStefan Weinhuber 53945f186beSJan Höppner rc = define_extent(NULL, dedata, trk, totrk, cmd, basedev, blksize); 5408e09f215SStefan Weinhuber 54145f186beSJan Höppner /* 54245f186beSJan Höppner * For some commands the System Time Stamp is set in the define extent 54345f186beSJan Höppner * data when XRC is supported. The validity of the time stamp must be 54445f186beSJan Höppner * reflected in the prefix data as well. 54545f186beSJan Höppner */ 54645f186beSJan Höppner if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02) 54745f186beSJan Höppner pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */ 548f3eb5384SStefan Weinhuber 549f3eb5384SStefan Weinhuber if (format == 1) { 55045f186beSJan Höppner locate_record_ext(NULL, lredata, trk, rec_on_trk, count, cmd, 551f3eb5384SStefan Weinhuber basedev, blksize, tlf); 552f3eb5384SStefan Weinhuber } 553f3eb5384SStefan Weinhuber 5548e09f215SStefan Weinhuber return rc; 5558e09f215SStefan Weinhuber } 5568e09f215SStefan Weinhuber 557f3eb5384SStefan Weinhuber static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 558f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 559f3eb5384SStefan Weinhuber struct dasd_device *basedev, struct dasd_device *startdev) 560f3eb5384SStefan Weinhuber { 561f3eb5384SStefan Weinhuber return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev, 562f3eb5384SStefan Weinhuber 0, 0, 0, 0, 0); 563f3eb5384SStefan Weinhuber } 564f3eb5384SStefan Weinhuber 5654d284cacSHeiko Carstens static void 566b44b0ab3SStefan Weinhuber locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk, 567b44b0ab3SStefan Weinhuber unsigned int rec_on_trk, int no_rec, int cmd, 5681da177e4SLinus Torvalds struct dasd_device * device, int reclen) 5691da177e4SLinus Torvalds { 570543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 5711da177e4SLinus Torvalds int sector; 5721da177e4SLinus Torvalds int dn, d; 5731da177e4SLinus Torvalds 5741da177e4SLinus Torvalds DBF_DEV_EVENT(DBF_INFO, device, 5751da177e4SLinus Torvalds "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", 5761da177e4SLinus Torvalds trk, rec_on_trk, no_rec, cmd, reclen); 5771da177e4SLinus Torvalds 5781da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; 5791da177e4SLinus Torvalds ccw->flags = 0; 5801da177e4SLinus Torvalds ccw->count = 16; 5811da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 5821da177e4SLinus Torvalds 5831da177e4SLinus Torvalds memset(data, 0, sizeof(struct LO_eckd_data)); 5841da177e4SLinus Torvalds sector = 0; 5851da177e4SLinus Torvalds if (rec_on_trk) { 5861da177e4SLinus Torvalds switch (private->rdc_data.dev_type) { 5871da177e4SLinus Torvalds case 0x3390: 5881da177e4SLinus Torvalds dn = ceil_quot(reclen + 6, 232); 5891da177e4SLinus Torvalds d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 5901da177e4SLinus Torvalds sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 5911da177e4SLinus Torvalds break; 5921da177e4SLinus Torvalds case 0x3380: 5931da177e4SLinus Torvalds d = 7 + ceil_quot(reclen + 12, 32); 5941da177e4SLinus Torvalds sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 5951da177e4SLinus Torvalds break; 5961da177e4SLinus Torvalds } 5971da177e4SLinus Torvalds } 5981da177e4SLinus Torvalds data->sector = sector; 5991da177e4SLinus Torvalds data->count = no_rec; 6001da177e4SLinus Torvalds switch (cmd) { 6011da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 6021da177e4SLinus Torvalds data->operation.orientation = 0x3; 6031da177e4SLinus Torvalds data->operation.operation = 0x03; 6041da177e4SLinus Torvalds break; 6051da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 6061da177e4SLinus Torvalds data->operation.orientation = 0x3; 6071da177e4SLinus Torvalds data->operation.operation = 0x16; 6081da177e4SLinus Torvalds break; 6091da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 6101da177e4SLinus Torvalds data->operation.orientation = 0x1; 6111da177e4SLinus Torvalds data->operation.operation = 0x03; 6121da177e4SLinus Torvalds data->count++; 6131da177e4SLinus Torvalds break; 6141da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 6151da177e4SLinus Torvalds data->operation.orientation = 0x3; 6161da177e4SLinus Torvalds data->operation.operation = 0x16; 6171da177e4SLinus Torvalds data->count++; 6181da177e4SLinus Torvalds break; 6191da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 6201da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 6211da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 6221da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 6231da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6241da177e4SLinus Torvalds data->length = reclen; 6251da177e4SLinus Torvalds data->operation.operation = 0x01; 6261da177e4SLinus Torvalds break; 6271da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 6281da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 6291da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6301da177e4SLinus Torvalds data->length = reclen; 6311da177e4SLinus Torvalds data->operation.operation = 0x03; 6321da177e4SLinus Torvalds break; 6331da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 6341da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 6351da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 6361da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 6371da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6381da177e4SLinus Torvalds data->length = reclen; 6391da177e4SLinus Torvalds data->operation.operation = 0x06; 6401da177e4SLinus Torvalds break; 6411da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 6421da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 6431da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6441da177e4SLinus Torvalds data->length = reclen; 6451da177e4SLinus Torvalds data->operation.operation = 0x16; 6461da177e4SLinus Torvalds break; 6471da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_COUNT: 6481da177e4SLinus Torvalds data->operation.operation = 0x06; 6491da177e4SLinus Torvalds break; 6501da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 6511da177e4SLinus Torvalds data->length = reclen; 6521da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6531da177e4SLinus Torvalds data->operation.operation = 0x0b; 6541da177e4SLinus Torvalds break; 6551da177e4SLinus Torvalds default: 656fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record " 657fc19f381SStefan Haberland "opcode 0x%x", cmd); 6581da177e4SLinus Torvalds } 659b44b0ab3SStefan Weinhuber set_ch_t(&data->seek_addr, 660b44b0ab3SStefan Weinhuber trk / private->rdc_data.trk_per_cyl, 661b44b0ab3SStefan Weinhuber trk % private->rdc_data.trk_per_cyl); 662b44b0ab3SStefan Weinhuber data->search_arg.cyl = data->seek_addr.cyl; 663b44b0ab3SStefan Weinhuber data->search_arg.head = data->seek_addr.head; 6641da177e4SLinus Torvalds data->search_arg.record = rec_on_trk; 6651da177e4SLinus Torvalds } 6661da177e4SLinus Torvalds 6671da177e4SLinus Torvalds /* 6681da177e4SLinus Torvalds * Returns 1 if the block is one of the special blocks that needs 6691da177e4SLinus Torvalds * to get read/written with the KD variant of the command. 6701da177e4SLinus Torvalds * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and 6711da177e4SLinus Torvalds * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. 6721da177e4SLinus Torvalds * Luckily the KD variants differ only by one bit (0x08) from the 6731da177e4SLinus Torvalds * normal variant. So don't wonder about code like: 6741da177e4SLinus Torvalds * if (dasd_eckd_cdl_special(blk_per_trk, recid)) 6751da177e4SLinus Torvalds * ccw->cmd_code |= 0x8; 6761da177e4SLinus Torvalds */ 6771da177e4SLinus Torvalds static inline int 6781da177e4SLinus Torvalds dasd_eckd_cdl_special(int blk_per_trk, int recid) 6791da177e4SLinus Torvalds { 6801da177e4SLinus Torvalds if (recid < 3) 6811da177e4SLinus Torvalds return 1; 6821da177e4SLinus Torvalds if (recid < blk_per_trk) 6831da177e4SLinus Torvalds return 0; 6841da177e4SLinus Torvalds if (recid < 2 * blk_per_trk) 6851da177e4SLinus Torvalds return 1; 6861da177e4SLinus Torvalds return 0; 6871da177e4SLinus Torvalds } 6881da177e4SLinus Torvalds 6891da177e4SLinus Torvalds /* 6901da177e4SLinus Torvalds * Returns the record size for the special blocks of the cdl format. 6911da177e4SLinus Torvalds * Only returns something useful if dasd_eckd_cdl_special is true 6921da177e4SLinus Torvalds * for the recid. 6931da177e4SLinus Torvalds */ 6941da177e4SLinus Torvalds static inline int 6951da177e4SLinus Torvalds dasd_eckd_cdl_reclen(int recid) 6961da177e4SLinus Torvalds { 6971da177e4SLinus Torvalds if (recid < 3) 6981da177e4SLinus Torvalds return sizes_trk0[recid]; 6991da177e4SLinus Torvalds return LABEL_SIZE; 7001da177e4SLinus Torvalds } 701b206181dSStefan Haberland /* create unique id from private structure. */ 702b206181dSStefan Haberland static void create_uid(struct dasd_eckd_private *private) 7033d052595SHorst Hummel { 7044abb08c2SStefan Weinhuber int count; 705b206181dSStefan Haberland struct dasd_uid *uid; 7063d052595SHorst Hummel 7072dedf0d9SStefan Haberland uid = &private->uid; 7083d052595SHorst Hummel memset(uid, 0, sizeof(struct dasd_uid)); 7094abb08c2SStefan Weinhuber memcpy(uid->vendor, private->ned->HDA_manufacturer, 7103d052595SHorst Hummel sizeof(uid->vendor) - 1); 7113d052595SHorst Hummel EBCASC(uid->vendor, sizeof(uid->vendor) - 1); 7124abb08c2SStefan Weinhuber memcpy(uid->serial, private->ned->HDA_location, 7133d052595SHorst Hummel sizeof(uid->serial) - 1); 7143d052595SHorst Hummel EBCASC(uid->serial, sizeof(uid->serial) - 1); 7154abb08c2SStefan Weinhuber uid->ssid = private->gneq->subsystemID; 716a419aef8SJoe Perches uid->real_unit_addr = private->ned->unit_addr; 7174abb08c2SStefan Weinhuber if (private->sneq) { 7184abb08c2SStefan Weinhuber uid->type = private->sneq->sua_flags; 7198e09f215SStefan Weinhuber if (uid->type == UA_BASE_PAV_ALIAS) 7204abb08c2SStefan Weinhuber uid->base_unit_addr = private->sneq->base_unit_addr; 7218e09f215SStefan Weinhuber } else { 7228e09f215SStefan Weinhuber uid->type = UA_BASE_DEVICE; 7238e09f215SStefan Weinhuber } 7244abb08c2SStefan Weinhuber if (private->vdsneq) { 7254abb08c2SStefan Weinhuber for (count = 0; count < 16; count++) { 7264abb08c2SStefan Weinhuber sprintf(uid->vduit+2*count, "%02x", 7274abb08c2SStefan Weinhuber private->vdsneq->uit[count]); 7284abb08c2SStefan Weinhuber } 7294abb08c2SStefan Weinhuber } 730b206181dSStefan Haberland } 731b206181dSStefan Haberland 732b206181dSStefan Haberland /* 733b206181dSStefan Haberland * Generate device unique id that specifies the physical device. 734b206181dSStefan Haberland */ 735b206181dSStefan Haberland static int dasd_eckd_generate_uid(struct dasd_device *device) 736b206181dSStefan Haberland { 737543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 738b206181dSStefan Haberland unsigned long flags; 739b206181dSStefan Haberland 740b206181dSStefan Haberland if (!private) 741b206181dSStefan Haberland return -ENODEV; 742b206181dSStefan Haberland if (!private->ned || !private->gneq) 743b206181dSStefan Haberland return -ENODEV; 744b206181dSStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 745b206181dSStefan Haberland create_uid(private); 7462dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 7473d052595SHorst Hummel return 0; 7483d052595SHorst Hummel } 7493d052595SHorst Hummel 7502dedf0d9SStefan Haberland static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid) 7512dedf0d9SStefan Haberland { 752543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 7532dedf0d9SStefan Haberland unsigned long flags; 7542dedf0d9SStefan Haberland 755543691a4SSebastian Ott if (private) { 7562dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 7572dedf0d9SStefan Haberland *uid = private->uid; 7582dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 7592dedf0d9SStefan Haberland return 0; 7602dedf0d9SStefan Haberland } 7612dedf0d9SStefan Haberland return -EINVAL; 7622dedf0d9SStefan Haberland } 7632dedf0d9SStefan Haberland 764b206181dSStefan Haberland /* 765b206181dSStefan Haberland * compare device UID with data of a given dasd_eckd_private structure 766b206181dSStefan Haberland * return 0 for match 767b206181dSStefan Haberland */ 768b206181dSStefan Haberland static int dasd_eckd_compare_path_uid(struct dasd_device *device, 769b206181dSStefan Haberland struct dasd_eckd_private *private) 770b206181dSStefan Haberland { 771b206181dSStefan Haberland struct dasd_uid device_uid; 772b206181dSStefan Haberland 773b206181dSStefan Haberland create_uid(private); 774b206181dSStefan Haberland dasd_eckd_get_uid(device, &device_uid); 775b206181dSStefan Haberland 776b206181dSStefan Haberland return memcmp(&device_uid, &private->uid, sizeof(struct dasd_uid)); 777b206181dSStefan Haberland } 778b206181dSStefan Haberland 779a4d26c6aSStefan Weinhuber static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device, 780a4d26c6aSStefan Weinhuber struct dasd_ccw_req *cqr, 781a4d26c6aSStefan Weinhuber __u8 *rcd_buffer, 782a4d26c6aSStefan Weinhuber __u8 lpm) 78317283b56SCornelia Huck { 78417283b56SCornelia Huck struct ccw1 *ccw; 785a4d26c6aSStefan Weinhuber /* 786a4d26c6aSStefan Weinhuber * buffer has to start with EBCDIC "V1.0" to show 787a4d26c6aSStefan Weinhuber * support for virtual device SNEQ 788a4d26c6aSStefan Weinhuber */ 789a4d26c6aSStefan Weinhuber rcd_buffer[0] = 0xE5; 790a4d26c6aSStefan Weinhuber rcd_buffer[1] = 0xF1; 791a4d26c6aSStefan Weinhuber rcd_buffer[2] = 0x4B; 792a4d26c6aSStefan Weinhuber rcd_buffer[3] = 0xF0; 79317283b56SCornelia Huck 79417283b56SCornelia Huck ccw = cqr->cpaddr; 795a4d26c6aSStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RCD; 796a4d26c6aSStefan Weinhuber ccw->flags = 0; 79717283b56SCornelia Huck ccw->cda = (__u32)(addr_t)rcd_buffer; 798a4d26c6aSStefan Weinhuber ccw->count = DASD_ECKD_RCD_DATA_SIZE; 799a4d26c6aSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 80017283b56SCornelia Huck 8018e09f215SStefan Weinhuber cqr->startdev = device; 8028e09f215SStefan Weinhuber cqr->memdev = device; 8038e09f215SStefan Weinhuber cqr->block = NULL; 80417283b56SCornelia Huck cqr->expires = 10*HZ; 80517283b56SCornelia Huck cqr->lpm = lpm; 806eb6e199bSStefan Weinhuber cqr->retries = 256; 8071aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 80817283b56SCornelia Huck cqr->status = DASD_CQR_FILLED; 809a4d26c6aSStefan Weinhuber set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 810a4d26c6aSStefan Weinhuber } 811a4d26c6aSStefan Weinhuber 8125915a873SStefan Haberland /* 8135915a873SStefan Haberland * Wakeup helper for read_conf 8145915a873SStefan Haberland * if the cqr is not done and needs some error recovery 8155915a873SStefan Haberland * the buffer has to be re-initialized with the EBCDIC "V1.0" 8165915a873SStefan Haberland * to show support for virtual device SNEQ 8175915a873SStefan Haberland */ 8185915a873SStefan Haberland static void read_conf_cb(struct dasd_ccw_req *cqr, void *data) 8195915a873SStefan Haberland { 8205915a873SStefan Haberland struct ccw1 *ccw; 8215915a873SStefan Haberland __u8 *rcd_buffer; 8225915a873SStefan Haberland 8235915a873SStefan Haberland if (cqr->status != DASD_CQR_DONE) { 8245915a873SStefan Haberland ccw = cqr->cpaddr; 8255915a873SStefan Haberland rcd_buffer = (__u8 *)((addr_t) ccw->cda); 8265915a873SStefan Haberland memset(rcd_buffer, 0, sizeof(*rcd_buffer)); 8275915a873SStefan Haberland 8285915a873SStefan Haberland rcd_buffer[0] = 0xE5; 8295915a873SStefan Haberland rcd_buffer[1] = 0xF1; 8305915a873SStefan Haberland rcd_buffer[2] = 0x4B; 8315915a873SStefan Haberland rcd_buffer[3] = 0xF0; 8325915a873SStefan Haberland } 8335915a873SStefan Haberland dasd_wakeup_cb(cqr, data); 8345915a873SStefan Haberland } 8355915a873SStefan Haberland 836a4d26c6aSStefan Weinhuber static int dasd_eckd_read_conf_immediately(struct dasd_device *device, 837a4d26c6aSStefan Weinhuber struct dasd_ccw_req *cqr, 838a4d26c6aSStefan Weinhuber __u8 *rcd_buffer, 839a4d26c6aSStefan Weinhuber __u8 lpm) 840a4d26c6aSStefan Weinhuber { 841a4d26c6aSStefan Weinhuber struct ciw *ciw; 842a4d26c6aSStefan Weinhuber int rc; 843a4d26c6aSStefan Weinhuber /* 844a4d26c6aSStefan Weinhuber * sanity check: scan for RCD command in extended SenseID data 845a4d26c6aSStefan Weinhuber * some devices do not support RCD 846a4d26c6aSStefan Weinhuber */ 847a4d26c6aSStefan Weinhuber ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 848a4d26c6aSStefan Weinhuber if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) 849a4d26c6aSStefan Weinhuber return -EOPNOTSUPP; 850a4d26c6aSStefan Weinhuber 851a4d26c6aSStefan Weinhuber dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm); 852a4d26c6aSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 8535a27e60dSStefan Weinhuber set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 854a4d26c6aSStefan Weinhuber cqr->retries = 5; 8555915a873SStefan Haberland cqr->callback = read_conf_cb; 856a4d26c6aSStefan Weinhuber rc = dasd_sleep_on_immediatly(cqr); 857a4d26c6aSStefan Weinhuber return rc; 85817283b56SCornelia Huck } 85917283b56SCornelia Huck 86017283b56SCornelia Huck static int dasd_eckd_read_conf_lpm(struct dasd_device *device, 86117283b56SCornelia Huck void **rcd_buffer, 86217283b56SCornelia Huck int *rcd_buffer_size, __u8 lpm) 86317283b56SCornelia Huck { 86417283b56SCornelia Huck struct ciw *ciw; 86517283b56SCornelia Huck char *rcd_buf = NULL; 86617283b56SCornelia Huck int ret; 86717283b56SCornelia Huck struct dasd_ccw_req *cqr; 86817283b56SCornelia Huck 86917283b56SCornelia Huck /* 870a4d26c6aSStefan Weinhuber * sanity check: scan for RCD command in extended SenseID data 871a4d26c6aSStefan Weinhuber * some devices do not support RCD 87217283b56SCornelia Huck */ 87317283b56SCornelia Huck ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 874a4d26c6aSStefan Weinhuber if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) { 87517283b56SCornelia Huck ret = -EOPNOTSUPP; 87617283b56SCornelia Huck goto out_error; 87717283b56SCornelia Huck } 878a4d26c6aSStefan Weinhuber rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA); 87917283b56SCornelia Huck if (!rcd_buf) { 88017283b56SCornelia Huck ret = -ENOMEM; 88117283b56SCornelia Huck goto out_error; 88217283b56SCornelia Huck } 883a4d26c6aSStefan Weinhuber cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, 884a4d26c6aSStefan Weinhuber 0, /* use rcd_buf as data ara */ 885a4d26c6aSStefan Weinhuber device); 88617283b56SCornelia Huck if (IS_ERR(cqr)) { 887a4d26c6aSStefan Weinhuber DBF_DEV_EVENT(DBF_WARNING, device, "%s", 888a4d26c6aSStefan Weinhuber "Could not allocate RCD request"); 889a4d26c6aSStefan Weinhuber ret = -ENOMEM; 89017283b56SCornelia Huck goto out_error; 89117283b56SCornelia Huck } 892a4d26c6aSStefan Weinhuber dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm); 8935915a873SStefan Haberland cqr->callback = read_conf_cb; 89417283b56SCornelia Huck ret = dasd_sleep_on(cqr); 89517283b56SCornelia Huck /* 89617283b56SCornelia Huck * on success we update the user input parms 89717283b56SCornelia Huck */ 8988e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 89917283b56SCornelia Huck if (ret) 90017283b56SCornelia Huck goto out_error; 90117283b56SCornelia Huck 902a4d26c6aSStefan Weinhuber *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE; 90317283b56SCornelia Huck *rcd_buffer = rcd_buf; 90417283b56SCornelia Huck return 0; 90517283b56SCornelia Huck out_error: 90617283b56SCornelia Huck kfree(rcd_buf); 90717283b56SCornelia Huck *rcd_buffer = NULL; 90817283b56SCornelia Huck *rcd_buffer_size = 0; 90917283b56SCornelia Huck return ret; 91017283b56SCornelia Huck } 91117283b56SCornelia Huck 9124abb08c2SStefan Weinhuber static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private) 9134abb08c2SStefan Weinhuber { 9144abb08c2SStefan Weinhuber 9154abb08c2SStefan Weinhuber struct dasd_sneq *sneq; 9164abb08c2SStefan Weinhuber int i, count; 9174abb08c2SStefan Weinhuber 9184abb08c2SStefan Weinhuber private->ned = NULL; 9194abb08c2SStefan Weinhuber private->sneq = NULL; 9204abb08c2SStefan Weinhuber private->vdsneq = NULL; 9214abb08c2SStefan Weinhuber private->gneq = NULL; 9224abb08c2SStefan Weinhuber count = private->conf_len / sizeof(struct dasd_sneq); 9234abb08c2SStefan Weinhuber sneq = (struct dasd_sneq *)private->conf_data; 9244abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 9254abb08c2SStefan Weinhuber if (sneq->flags.identifier == 1 && sneq->format == 1) 9264abb08c2SStefan Weinhuber private->sneq = sneq; 9274abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 1 && sneq->format == 4) 9284abb08c2SStefan Weinhuber private->vdsneq = (struct vd_sneq *)sneq; 9294abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 2) 9304abb08c2SStefan Weinhuber private->gneq = (struct dasd_gneq *)sneq; 9314abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 3 && sneq->res1 == 1) 9324abb08c2SStefan Weinhuber private->ned = (struct dasd_ned *)sneq; 9334abb08c2SStefan Weinhuber sneq++; 9344abb08c2SStefan Weinhuber } 9354abb08c2SStefan Weinhuber if (!private->ned || !private->gneq) { 9364abb08c2SStefan Weinhuber private->ned = NULL; 9374abb08c2SStefan Weinhuber private->sneq = NULL; 9384abb08c2SStefan Weinhuber private->vdsneq = NULL; 9394abb08c2SStefan Weinhuber private->gneq = NULL; 9404abb08c2SStefan Weinhuber return -EINVAL; 9414abb08c2SStefan Weinhuber } 9424abb08c2SStefan Weinhuber return 0; 9434abb08c2SStefan Weinhuber 9444abb08c2SStefan Weinhuber }; 9454abb08c2SStefan Weinhuber 9464abb08c2SStefan Weinhuber static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len) 9474abb08c2SStefan Weinhuber { 9484abb08c2SStefan Weinhuber struct dasd_gneq *gneq; 9494abb08c2SStefan Weinhuber int i, count, found; 9504abb08c2SStefan Weinhuber 9514abb08c2SStefan Weinhuber count = conf_len / sizeof(*gneq); 9524abb08c2SStefan Weinhuber gneq = (struct dasd_gneq *)conf_data; 9534abb08c2SStefan Weinhuber found = 0; 9544abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 9554abb08c2SStefan Weinhuber if (gneq->flags.identifier == 2) { 9564abb08c2SStefan Weinhuber found = 1; 9574abb08c2SStefan Weinhuber break; 9584abb08c2SStefan Weinhuber } 9594abb08c2SStefan Weinhuber gneq++; 9604abb08c2SStefan Weinhuber } 9614abb08c2SStefan Weinhuber if (found) 9624abb08c2SStefan Weinhuber return ((char *)gneq)[18] & 0x07; 9634abb08c2SStefan Weinhuber else 9644abb08c2SStefan Weinhuber return 0; 9654abb08c2SStefan Weinhuber } 9664abb08c2SStefan Weinhuber 967c7c0c9deSStefan Haberland static void dasd_eckd_clear_conf_data(struct dasd_device *device) 968c7c0c9deSStefan Haberland { 969543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 970c7c0c9deSStefan Haberland int i; 971c7c0c9deSStefan Haberland 972c7c0c9deSStefan Haberland private->conf_data = NULL; 973c7c0c9deSStefan Haberland private->conf_len = 0; 974c7c0c9deSStefan Haberland for (i = 0; i < 8; i++) { 975c9346151SStefan Haberland kfree(device->path[i].conf_data); 976c9346151SStefan Haberland device->path[i].conf_data = NULL; 977a521b048SStefan Haberland device->path[i].cssid = 0; 978a521b048SStefan Haberland device->path[i].ssid = 0; 979a521b048SStefan Haberland device->path[i].chpid = 0; 980c7c0c9deSStefan Haberland } 981c7c0c9deSStefan Haberland } 982c7c0c9deSStefan Haberland 983c7c0c9deSStefan Haberland 9844abb08c2SStefan Weinhuber static int dasd_eckd_read_conf(struct dasd_device *device) 9851da177e4SLinus Torvalds { 9861da177e4SLinus Torvalds void *conf_data; 9871da177e4SLinus Torvalds int conf_len, conf_data_saved; 988b179b037SStefan Haberland int rc, path_err, pos; 989a4d26c6aSStefan Weinhuber __u8 lpm, opm; 990b206181dSStefan Haberland struct dasd_eckd_private *private, path_private; 991b206181dSStefan Haberland struct dasd_uid *uid; 992b206181dSStefan Haberland char print_path_uid[60], print_device_uid[60]; 993a521b048SStefan Haberland struct channel_path_desc *chp_desc; 994a521b048SStefan Haberland struct subchannel_id sch_id; 9951da177e4SLinus Torvalds 996543691a4SSebastian Ott private = device->private; 997a4d26c6aSStefan Weinhuber opm = ccw_device_get_path_mask(device->cdev); 998a521b048SStefan Haberland ccw_device_get_schid(device->cdev, &sch_id); 9991da177e4SLinus Torvalds conf_data_saved = 0; 100055d3a85cSStefan Haberland path_err = 0; 10011da177e4SLinus Torvalds /* get configuration data per operational path */ 10021da177e4SLinus Torvalds for (lpm = 0x80; lpm; lpm>>= 1) { 1003b206181dSStefan Haberland if (!(lpm & opm)) 1004b206181dSStefan Haberland continue; 100517283b56SCornelia Huck rc = dasd_eckd_read_conf_lpm(device, &conf_data, 10061da177e4SLinus Torvalds &conf_len, lpm); 10071da177e4SLinus Torvalds if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ 1008b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 10091da177e4SLinus Torvalds "Read configuration data returned " 1010b8ed5dd5SStefan Haberland "error %d", rc); 10111da177e4SLinus Torvalds return rc; 10121da177e4SLinus Torvalds } 10131da177e4SLinus Torvalds if (conf_data == NULL) { 1014b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1015b8ed5dd5SStefan Haberland "No configuration data " 1016b8ed5dd5SStefan Haberland "retrieved"); 1017a4d26c6aSStefan Weinhuber /* no further analysis possible */ 1018c9346151SStefan Haberland dasd_path_add_opm(device, opm); 1019d133a960SGabriel Craciunescu continue; /* no error */ 10201da177e4SLinus Torvalds } 10211da177e4SLinus Torvalds /* save first valid configuration data */ 10221da177e4SLinus Torvalds if (!conf_data_saved) { 1023c7c0c9deSStefan Haberland /* initially clear previously stored conf_data */ 1024c7c0c9deSStefan Haberland dasd_eckd_clear_conf_data(device); 10254abb08c2SStefan Weinhuber private->conf_data = conf_data; 10264abb08c2SStefan Weinhuber private->conf_len = conf_len; 10274abb08c2SStefan Weinhuber if (dasd_eckd_identify_conf_parts(private)) { 10284abb08c2SStefan Weinhuber private->conf_data = NULL; 10294abb08c2SStefan Weinhuber private->conf_len = 0; 10304abb08c2SStefan Weinhuber kfree(conf_data); 10314abb08c2SStefan Weinhuber continue; 10324abb08c2SStefan Weinhuber } 1033c7c0c9deSStefan Haberland pos = pathmask_to_pos(lpm); 1034c7c0c9deSStefan Haberland /* store per path conf_data */ 1035c9346151SStefan Haberland device->path[pos].conf_data = conf_data; 1036a521b048SStefan Haberland device->path[pos].cssid = sch_id.cssid; 1037a521b048SStefan Haberland device->path[pos].ssid = sch_id.ssid; 1038a521b048SStefan Haberland chp_desc = ccw_device_get_chp_desc(device->cdev, pos); 1039a521b048SStefan Haberland if (chp_desc) 1040a521b048SStefan Haberland device->path[pos].chpid = chp_desc->chpid; 1041a521b048SStefan Haberland kfree(chp_desc); 1042b206181dSStefan Haberland /* 1043b206181dSStefan Haberland * build device UID that other path data 1044b206181dSStefan Haberland * can be compared to it 1045b206181dSStefan Haberland */ 1046b206181dSStefan Haberland dasd_eckd_generate_uid(device); 10471da177e4SLinus Torvalds conf_data_saved++; 1048b206181dSStefan Haberland } else { 1049b206181dSStefan Haberland path_private.conf_data = conf_data; 1050b206181dSStefan Haberland path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1051b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts( 1052b206181dSStefan Haberland &path_private)) { 1053b206181dSStefan Haberland path_private.conf_data = NULL; 1054b206181dSStefan Haberland path_private.conf_len = 0; 1055b206181dSStefan Haberland kfree(conf_data); 1056b206181dSStefan Haberland continue; 1057b206181dSStefan Haberland } 1058b206181dSStefan Haberland if (dasd_eckd_compare_path_uid( 1059b206181dSStefan Haberland device, &path_private)) { 1060b206181dSStefan Haberland uid = &path_private.uid; 1061b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1062b206181dSStefan Haberland snprintf(print_path_uid, 1063b206181dSStefan Haberland sizeof(print_path_uid), 1064b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1065b206181dSStefan Haberland uid->vendor, uid->serial, 1066b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1067b206181dSStefan Haberland uid->vduit); 1068b206181dSStefan Haberland else 1069b206181dSStefan Haberland snprintf(print_path_uid, 1070b206181dSStefan Haberland sizeof(print_path_uid), 1071b206181dSStefan Haberland "%s.%s.%04x.%02x", 1072b206181dSStefan Haberland uid->vendor, uid->serial, 1073b206181dSStefan Haberland uid->ssid, 1074b206181dSStefan Haberland uid->real_unit_addr); 1075b206181dSStefan Haberland uid = &private->uid; 1076b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1077b206181dSStefan Haberland snprintf(print_device_uid, 1078b206181dSStefan Haberland sizeof(print_device_uid), 1079b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1080b206181dSStefan Haberland uid->vendor, uid->serial, 1081b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1082b206181dSStefan Haberland uid->vduit); 1083b206181dSStefan Haberland else 1084b206181dSStefan Haberland snprintf(print_device_uid, 1085b206181dSStefan Haberland sizeof(print_device_uid), 1086b206181dSStefan Haberland "%s.%s.%04x.%02x", 1087b206181dSStefan Haberland uid->vendor, uid->serial, 1088b206181dSStefan Haberland uid->ssid, 1089b206181dSStefan Haberland uid->real_unit_addr); 1090b206181dSStefan Haberland dev_err(&device->cdev->dev, 1091b206181dSStefan Haberland "Not all channel paths lead to " 1092b206181dSStefan Haberland "the same device, path %02X leads to " 1093b206181dSStefan Haberland "device %s instead of %s\n", lpm, 1094b206181dSStefan Haberland print_path_uid, print_device_uid); 109555d3a85cSStefan Haberland path_err = -EINVAL; 1096c9346151SStefan Haberland dasd_path_add_cablepm(device, lpm); 109755d3a85cSStefan Haberland continue; 1098b206181dSStefan Haberland } 1099c7c0c9deSStefan Haberland pos = pathmask_to_pos(lpm); 1100c7c0c9deSStefan Haberland /* store per path conf_data */ 1101c9346151SStefan Haberland device->path[pos].conf_data = conf_data; 1102a521b048SStefan Haberland device->path[pos].cssid = sch_id.cssid; 1103a521b048SStefan Haberland device->path[pos].ssid = sch_id.ssid; 1104a521b048SStefan Haberland chp_desc = ccw_device_get_chp_desc(device->cdev, pos); 1105a521b048SStefan Haberland if (chp_desc) 1106a521b048SStefan Haberland device->path[pos].chpid = chp_desc->chpid; 1107a521b048SStefan Haberland kfree(chp_desc); 1108b206181dSStefan Haberland path_private.conf_data = NULL; 1109b206181dSStefan Haberland path_private.conf_len = 0; 11101da177e4SLinus Torvalds } 11114abb08c2SStefan Weinhuber switch (dasd_eckd_path_access(conf_data, conf_len)) { 11121da177e4SLinus Torvalds case 0x02: 1113c9346151SStefan Haberland dasd_path_add_nppm(device, lpm); 11141da177e4SLinus Torvalds break; 11151da177e4SLinus Torvalds case 0x03: 1116c9346151SStefan Haberland dasd_path_add_ppm(device, lpm); 11171da177e4SLinus Torvalds break; 11181da177e4SLinus Torvalds } 1119c9346151SStefan Haberland if (!dasd_path_get_opm(device)) { 1120c9346151SStefan Haberland dasd_path_set_opm(device, lpm); 1121ccc0e7dcSStefan Haberland dasd_generic_path_operational(device); 1122ccc0e7dcSStefan Haberland } else { 1123c9346151SStefan Haberland dasd_path_add_opm(device, lpm); 1124ccc0e7dcSStefan Haberland } 11251da177e4SLinus Torvalds } 1126b206181dSStefan Haberland 112755d3a85cSStefan Haberland return path_err; 11281da177e4SLinus Torvalds } 11291da177e4SLinus Torvalds 1130a521b048SStefan Haberland static u32 get_fcx_max_data(struct dasd_device *device) 1131a521b048SStefan Haberland { 1132a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 1133a521b048SStefan Haberland int fcx_in_css, fcx_in_gneq, fcx_in_features; 1134a521b048SStefan Haberland int tpm, mdc; 1135a521b048SStefan Haberland 1136a521b048SStefan Haberland if (dasd_nofcx) 1137a521b048SStefan Haberland return 0; 1138a521b048SStefan Haberland /* is transport mode supported? */ 1139a521b048SStefan Haberland fcx_in_css = css_general_characteristics.fcx; 1140a521b048SStefan Haberland fcx_in_gneq = private->gneq->reserved2[7] & 0x04; 1141a521b048SStefan Haberland fcx_in_features = private->features.feature[40] & 0x80; 1142a521b048SStefan Haberland tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; 1143a521b048SStefan Haberland 1144a521b048SStefan Haberland if (!tpm) 1145a521b048SStefan Haberland return 0; 1146a521b048SStefan Haberland 1147a521b048SStefan Haberland mdc = ccw_device_get_mdc(device->cdev, 0); 1148a521b048SStefan Haberland if (mdc < 0) { 1149a521b048SStefan Haberland dev_warn(&device->cdev->dev, "Detecting the maximum supported data size for zHPF requests failed\n"); 1150a521b048SStefan Haberland return 0; 1151a521b048SStefan Haberland } else { 1152a521b048SStefan Haberland return (u32)mdc * FCX_MAX_DATA_FACTOR; 1153a521b048SStefan Haberland } 1154a521b048SStefan Haberland } 1155a521b048SStefan Haberland 1156a4d26c6aSStefan Weinhuber static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm) 1157a4d26c6aSStefan Weinhuber { 1158543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1159a4d26c6aSStefan Weinhuber int mdc; 1160a4d26c6aSStefan Weinhuber u32 fcx_max_data; 1161a4d26c6aSStefan Weinhuber 1162a4d26c6aSStefan Weinhuber if (private->fcx_max_data) { 1163a4d26c6aSStefan Weinhuber mdc = ccw_device_get_mdc(device->cdev, lpm); 1164a4d26c6aSStefan Weinhuber if ((mdc < 0)) { 1165a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1166a4d26c6aSStefan Weinhuber "Detecting the maximum data size for zHPF " 1167a4d26c6aSStefan Weinhuber "requests failed (rc=%d) for a new path %x\n", 1168a4d26c6aSStefan Weinhuber mdc, lpm); 1169a4d26c6aSStefan Weinhuber return mdc; 1170a4d26c6aSStefan Weinhuber } 11710f02c4e7SChristian Borntraeger fcx_max_data = (u32)mdc * FCX_MAX_DATA_FACTOR; 1172a4d26c6aSStefan Weinhuber if (fcx_max_data < private->fcx_max_data) { 1173a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1174a4d26c6aSStefan Weinhuber "The maximum data size for zHPF requests %u " 1175a4d26c6aSStefan Weinhuber "on a new path %x is below the active maximum " 1176a4d26c6aSStefan Weinhuber "%u\n", fcx_max_data, lpm, 1177a4d26c6aSStefan Weinhuber private->fcx_max_data); 1178a4d26c6aSStefan Weinhuber return -EACCES; 1179a4d26c6aSStefan Weinhuber } 1180a4d26c6aSStefan Weinhuber } 1181a4d26c6aSStefan Weinhuber return 0; 1182a4d26c6aSStefan Weinhuber } 1183a4d26c6aSStefan Weinhuber 1184b206181dSStefan Haberland static int rebuild_device_uid(struct dasd_device *device, 1185b206181dSStefan Haberland struct path_verification_work_data *data) 1186b206181dSStefan Haberland { 1187543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1188c9346151SStefan Haberland __u8 lpm, opm = dasd_path_get_opm(device); 1189543691a4SSebastian Ott int rc = -ENODEV; 1190b206181dSStefan Haberland 1191b206181dSStefan Haberland for (lpm = 0x80; lpm; lpm >>= 1) { 1192b206181dSStefan Haberland if (!(lpm & opm)) 1193b206181dSStefan Haberland continue; 1194b206181dSStefan Haberland memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1195b206181dSStefan Haberland memset(&data->cqr, 0, sizeof(data->cqr)); 1196b206181dSStefan Haberland data->cqr.cpaddr = &data->ccw; 1197b206181dSStefan Haberland rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1198b206181dSStefan Haberland data->rcd_buffer, 1199b206181dSStefan Haberland lpm); 1200b206181dSStefan Haberland 1201b206181dSStefan Haberland if (rc) { 1202b206181dSStefan Haberland if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */ 1203b206181dSStefan Haberland continue; 1204b206181dSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1205b206181dSStefan Haberland "Read configuration data " 1206b206181dSStefan Haberland "returned error %d", rc); 1207b206181dSStefan Haberland break; 1208b206181dSStefan Haberland } 1209b206181dSStefan Haberland memcpy(private->conf_data, data->rcd_buffer, 1210b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE); 1211b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts(private)) { 1212b206181dSStefan Haberland rc = -ENODEV; 1213b206181dSStefan Haberland } else /* first valid path is enough */ 1214b206181dSStefan Haberland break; 1215b206181dSStefan Haberland } 1216b206181dSStefan Haberland 1217b206181dSStefan Haberland if (!rc) 1218b206181dSStefan Haberland rc = dasd_eckd_generate_uid(device); 1219b206181dSStefan Haberland 1220b206181dSStefan Haberland return rc; 1221b206181dSStefan Haberland } 1222b206181dSStefan Haberland 1223a4d26c6aSStefan Weinhuber static void do_path_verification_work(struct work_struct *work) 1224a4d26c6aSStefan Weinhuber { 1225a4d26c6aSStefan Weinhuber struct path_verification_work_data *data; 1226a4d26c6aSStefan Weinhuber struct dasd_device *device; 1227b206181dSStefan Haberland struct dasd_eckd_private path_private; 1228b206181dSStefan Haberland struct dasd_uid *uid; 1229b206181dSStefan Haberland __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE]; 12305db8440cSStefan Haberland __u8 lpm, opm, npm, ppm, epm, hpfpm, cablepm; 1231a4d26c6aSStefan Weinhuber unsigned long flags; 1232b206181dSStefan Haberland char print_uid[60]; 1233a4d26c6aSStefan Weinhuber int rc; 1234a4d26c6aSStefan Weinhuber 1235a4d26c6aSStefan Weinhuber data = container_of(work, struct path_verification_work_data, worker); 1236a4d26c6aSStefan Weinhuber device = data->device; 1237a4d26c6aSStefan Weinhuber 1238c8d1c0ffSStefan Haberland /* delay path verification until device was resumed */ 1239c8d1c0ffSStefan Haberland if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 1240c8d1c0ffSStefan Haberland schedule_work(work); 1241c8d1c0ffSStefan Haberland return; 1242c8d1c0ffSStefan Haberland } 12431eb38023SStefan Haberland /* check if path verification already running and delay if so */ 12441eb38023SStefan Haberland if (test_and_set_bit(DASD_FLAG_PATH_VERIFY, &device->flags)) { 12451eb38023SStefan Haberland schedule_work(work); 12461eb38023SStefan Haberland return; 12471eb38023SStefan Haberland } 1248a4d26c6aSStefan Weinhuber opm = 0; 1249a4d26c6aSStefan Weinhuber npm = 0; 1250a4d26c6aSStefan Weinhuber ppm = 0; 1251a4d26c6aSStefan Weinhuber epm = 0; 12525db8440cSStefan Haberland hpfpm = 0; 12535db8440cSStefan Haberland cablepm = 0; 12545db8440cSStefan Haberland 1255a4d26c6aSStefan Weinhuber for (lpm = 0x80; lpm; lpm >>= 1) { 1256b206181dSStefan Haberland if (!(lpm & data->tbvpm)) 1257b206181dSStefan Haberland continue; 1258b206181dSStefan Haberland memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1259a4d26c6aSStefan Weinhuber memset(&data->cqr, 0, sizeof(data->cqr)); 1260a4d26c6aSStefan Weinhuber data->cqr.cpaddr = &data->ccw; 1261a4d26c6aSStefan Weinhuber rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1262a4d26c6aSStefan Weinhuber data->rcd_buffer, 1263a4d26c6aSStefan Weinhuber lpm); 1264a4d26c6aSStefan Weinhuber if (!rc) { 1265a4d26c6aSStefan Weinhuber switch (dasd_eckd_path_access(data->rcd_buffer, 1266b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE) 1267b206181dSStefan Haberland ) { 1268a4d26c6aSStefan Weinhuber case 0x02: 1269a4d26c6aSStefan Weinhuber npm |= lpm; 1270a4d26c6aSStefan Weinhuber break; 1271a4d26c6aSStefan Weinhuber case 0x03: 1272a4d26c6aSStefan Weinhuber ppm |= lpm; 1273a4d26c6aSStefan Weinhuber break; 1274a4d26c6aSStefan Weinhuber } 1275a4d26c6aSStefan Weinhuber opm |= lpm; 1276a4d26c6aSStefan Weinhuber } else if (rc == -EOPNOTSUPP) { 1277a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1278a4d26c6aSStefan Weinhuber "path verification: No configuration " 1279a4d26c6aSStefan Weinhuber "data retrieved"); 1280a4d26c6aSStefan Weinhuber opm |= lpm; 1281a4d26c6aSStefan Weinhuber } else if (rc == -EAGAIN) { 1282a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1283a4d26c6aSStefan Weinhuber "path verification: device is stopped," 1284a4d26c6aSStefan Weinhuber " try again later"); 1285a4d26c6aSStefan Weinhuber epm |= lpm; 1286a4d26c6aSStefan Weinhuber } else { 1287a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1288a4d26c6aSStefan Weinhuber "Reading device feature codes failed " 1289a4d26c6aSStefan Weinhuber "(rc=%d) for new path %x\n", rc, lpm); 1290a4d26c6aSStefan Weinhuber continue; 1291a4d26c6aSStefan Weinhuber } 1292a4d26c6aSStefan Weinhuber if (verify_fcx_max_data(device, lpm)) { 1293a4d26c6aSStefan Weinhuber opm &= ~lpm; 1294a4d26c6aSStefan Weinhuber npm &= ~lpm; 1295a4d26c6aSStefan Weinhuber ppm &= ~lpm; 12965db8440cSStefan Haberland hpfpm |= lpm; 1297b206181dSStefan Haberland continue; 1298b206181dSStefan Haberland } 1299b206181dSStefan Haberland 1300b206181dSStefan Haberland /* 1301b206181dSStefan Haberland * save conf_data for comparison after 1302b206181dSStefan Haberland * rebuild_device_uid may have changed 1303b206181dSStefan Haberland * the original data 1304b206181dSStefan Haberland */ 1305b206181dSStefan Haberland memcpy(&path_rcd_buf, data->rcd_buffer, 1306b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE); 1307b206181dSStefan Haberland path_private.conf_data = (void *) &path_rcd_buf; 1308b206181dSStefan Haberland path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1309b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts(&path_private)) { 1310b206181dSStefan Haberland path_private.conf_data = NULL; 1311b206181dSStefan Haberland path_private.conf_len = 0; 1312b206181dSStefan Haberland continue; 1313b206181dSStefan Haberland } 1314b206181dSStefan Haberland 1315b206181dSStefan Haberland /* 1316b206181dSStefan Haberland * compare path UID with device UID only if at least 1317b206181dSStefan Haberland * one valid path is left 1318b206181dSStefan Haberland * in other case the device UID may have changed and 1319b206181dSStefan Haberland * the first working path UID will be used as device UID 1320b206181dSStefan Haberland */ 1321c9346151SStefan Haberland if (dasd_path_get_opm(device) && 1322b206181dSStefan Haberland dasd_eckd_compare_path_uid(device, &path_private)) { 1323b206181dSStefan Haberland /* 1324b206181dSStefan Haberland * the comparison was not successful 1325b206181dSStefan Haberland * rebuild the device UID with at least one 1326b206181dSStefan Haberland * known path in case a z/VM hyperswap command 1327b206181dSStefan Haberland * has changed the device 1328b206181dSStefan Haberland * 1329b206181dSStefan Haberland * after this compare again 1330b206181dSStefan Haberland * 1331b206181dSStefan Haberland * if either the rebuild or the recompare fails 1332b206181dSStefan Haberland * the path can not be used 1333b206181dSStefan Haberland */ 1334b206181dSStefan Haberland if (rebuild_device_uid(device, data) || 1335b206181dSStefan Haberland dasd_eckd_compare_path_uid( 1336b206181dSStefan Haberland device, &path_private)) { 1337b206181dSStefan Haberland uid = &path_private.uid; 1338b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1339b206181dSStefan Haberland snprintf(print_uid, sizeof(print_uid), 1340b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1341b206181dSStefan Haberland uid->vendor, uid->serial, 1342b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1343b206181dSStefan Haberland uid->vduit); 1344b206181dSStefan Haberland else 1345b206181dSStefan Haberland snprintf(print_uid, sizeof(print_uid), 1346b206181dSStefan Haberland "%s.%s.%04x.%02x", 1347b206181dSStefan Haberland uid->vendor, uid->serial, 1348b206181dSStefan Haberland uid->ssid, 1349b206181dSStefan Haberland uid->real_unit_addr); 1350b206181dSStefan Haberland dev_err(&device->cdev->dev, 1351b206181dSStefan Haberland "The newly added channel path %02X " 1352b206181dSStefan Haberland "will not be used because it leads " 1353b206181dSStefan Haberland "to a different device %s\n", 1354b206181dSStefan Haberland lpm, print_uid); 1355b206181dSStefan Haberland opm &= ~lpm; 1356b206181dSStefan Haberland npm &= ~lpm; 1357b206181dSStefan Haberland ppm &= ~lpm; 13585db8440cSStefan Haberland cablepm |= lpm; 1359b206181dSStefan Haberland continue; 1360a4d26c6aSStefan Weinhuber } 1361a4d26c6aSStefan Weinhuber } 1362b206181dSStefan Haberland 1363a4d26c6aSStefan Weinhuber /* 1364a4d26c6aSStefan Weinhuber * There is a small chance that a path is lost again between 1365a4d26c6aSStefan Weinhuber * above path verification and the following modification of 1366a4d26c6aSStefan Weinhuber * the device opm mask. We could avoid that race here by using 1367a4d26c6aSStefan Weinhuber * yet another path mask, but we rather deal with this unlikely 1368a4d26c6aSStefan Weinhuber * situation in dasd_start_IO. 1369a4d26c6aSStefan Weinhuber */ 1370a4d26c6aSStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1371c9346151SStefan Haberland if (!dasd_path_get_opm(device) && opm) { 1372c9346151SStefan Haberland dasd_path_set_opm(device, opm); 1373a4d26c6aSStefan Weinhuber dasd_generic_path_operational(device); 13745db8440cSStefan Haberland } else { 1375c9346151SStefan Haberland dasd_path_add_opm(device, opm); 13765db8440cSStefan Haberland } 1377c9346151SStefan Haberland dasd_path_add_nppm(device, npm); 1378c9346151SStefan Haberland dasd_path_add_ppm(device, ppm); 1379c9346151SStefan Haberland dasd_path_add_tbvpm(device, epm); 1380c9346151SStefan Haberland dasd_path_add_cablepm(device, cablepm); 1381c9346151SStefan Haberland dasd_path_add_nohpfpm(device, hpfpm); 1382a4d26c6aSStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1383b206181dSStefan Haberland } 13841eb38023SStefan Haberland clear_bit(DASD_FLAG_PATH_VERIFY, &device->flags); 1385a4d26c6aSStefan Weinhuber dasd_put_device(device); 1386a4d26c6aSStefan Weinhuber if (data->isglobal) 1387a4d26c6aSStefan Weinhuber mutex_unlock(&dasd_path_verification_mutex); 1388a4d26c6aSStefan Weinhuber else 1389a4d26c6aSStefan Weinhuber kfree(data); 1390a4d26c6aSStefan Weinhuber } 1391a4d26c6aSStefan Weinhuber 1392a4d26c6aSStefan Weinhuber static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm) 1393a4d26c6aSStefan Weinhuber { 1394a4d26c6aSStefan Weinhuber struct path_verification_work_data *data; 1395a4d26c6aSStefan Weinhuber 1396a4d26c6aSStefan Weinhuber data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA); 1397a4d26c6aSStefan Weinhuber if (!data) { 1398a4d26c6aSStefan Weinhuber if (mutex_trylock(&dasd_path_verification_mutex)) { 1399a4d26c6aSStefan Weinhuber data = path_verification_worker; 1400a4d26c6aSStefan Weinhuber data->isglobal = 1; 1401a4d26c6aSStefan Weinhuber } else 1402a4d26c6aSStefan Weinhuber return -ENOMEM; 1403a4d26c6aSStefan Weinhuber } else { 1404a4d26c6aSStefan Weinhuber memset(data, 0, sizeof(*data)); 1405a4d26c6aSStefan Weinhuber data->isglobal = 0; 1406a4d26c6aSStefan Weinhuber } 1407a4d26c6aSStefan Weinhuber INIT_WORK(&data->worker, do_path_verification_work); 1408a4d26c6aSStefan Weinhuber dasd_get_device(device); 1409a4d26c6aSStefan Weinhuber data->device = device; 1410a4d26c6aSStefan Weinhuber data->tbvpm = lpm; 1411a4d26c6aSStefan Weinhuber schedule_work(&data->worker); 1412a4d26c6aSStefan Weinhuber return 0; 1413a4d26c6aSStefan Weinhuber } 1414a4d26c6aSStefan Weinhuber 1415a521b048SStefan Haberland static void dasd_eckd_reset_path(struct dasd_device *device, __u8 pm) 1416a521b048SStefan Haberland { 1417a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 1418a521b048SStefan Haberland unsigned long flags; 1419a521b048SStefan Haberland 1420a521b048SStefan Haberland if (!private->fcx_max_data) 1421a521b048SStefan Haberland private->fcx_max_data = get_fcx_max_data(device); 1422a521b048SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1423a521b048SStefan Haberland dasd_path_set_tbvpm(device, pm ? : dasd_path_get_notoperpm(device)); 1424a521b048SStefan Haberland dasd_schedule_device_bh(device); 1425a521b048SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1426a521b048SStefan Haberland } 1427a521b048SStefan Haberland 14288e09f215SStefan Weinhuber static int dasd_eckd_read_features(struct dasd_device *device) 14298e09f215SStefan Weinhuber { 1430543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 14318e09f215SStefan Weinhuber struct dasd_psf_prssd_data *prssdp; 14328e09f215SStefan Weinhuber struct dasd_rssd_features *features; 14338e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 14348e09f215SStefan Weinhuber struct ccw1 *ccw; 14358e09f215SStefan Weinhuber int rc; 14368e09f215SStefan Weinhuber 143768d1e5f0SStefan Weinhuber memset(&private->features, 0, sizeof(struct dasd_rssd_features)); 143868b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 14398e09f215SStefan Weinhuber (sizeof(struct dasd_psf_prssd_data) + 14408e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)), 14418e09f215SStefan Weinhuber device); 14428e09f215SStefan Weinhuber if (IS_ERR(cqr)) { 1443b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " 1444b8ed5dd5SStefan Haberland "allocate initialization request"); 14458e09f215SStefan Weinhuber return PTR_ERR(cqr); 14468e09f215SStefan Weinhuber } 14478e09f215SStefan Weinhuber cqr->startdev = device; 14488e09f215SStefan Weinhuber cqr->memdev = device; 14498e09f215SStefan Weinhuber cqr->block = NULL; 1450eb6e199bSStefan Weinhuber cqr->retries = 256; 14518e09f215SStefan Weinhuber cqr->expires = 10 * HZ; 14528e09f215SStefan Weinhuber 14538e09f215SStefan Weinhuber /* Prepare for Read Subsystem Data */ 14548e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 14558e09f215SStefan Weinhuber memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 14568e09f215SStefan Weinhuber prssdp->order = PSF_ORDER_PRSSD; 14578e09f215SStefan Weinhuber prssdp->suborder = 0x41; /* Read Feature Codes */ 14588e09f215SStefan Weinhuber /* all other bytes of prssdp must be zero */ 14598e09f215SStefan Weinhuber 14608e09f215SStefan Weinhuber ccw = cqr->cpaddr; 14618e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PSF; 14628e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_psf_prssd_data); 14638e09f215SStefan Weinhuber ccw->flags |= CCW_FLAG_CC; 14648e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) prssdp; 14658e09f215SStefan Weinhuber 14668e09f215SStefan Weinhuber /* Read Subsystem Data - feature codes */ 14678e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 14688e09f215SStefan Weinhuber memset(features, 0, sizeof(struct dasd_rssd_features)); 14698e09f215SStefan Weinhuber 14708e09f215SStefan Weinhuber ccw++; 14718e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RSSD; 14728e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_rssd_features); 14738e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) features; 14748e09f215SStefan Weinhuber 14751aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 14768e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 14778e09f215SStefan Weinhuber rc = dasd_sleep_on(cqr); 14788e09f215SStefan Weinhuber if (rc == 0) { 14798e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 14808e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 14818e09f215SStefan Weinhuber memcpy(&private->features, features, 14828e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)); 148368d1e5f0SStefan Weinhuber } else 148468d1e5f0SStefan Weinhuber dev_warn(&device->cdev->dev, "Reading device feature codes" 148568d1e5f0SStefan Weinhuber " failed with rc=%d\n", rc); 14868e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 14878e09f215SStefan Weinhuber return rc; 14888e09f215SStefan Weinhuber } 14898e09f215SStefan Weinhuber 14908e09f215SStefan Weinhuber 14913d052595SHorst Hummel /* 149240545573SHorst Hummel * Build CP for Perform Subsystem Function - SSC. 149340545573SHorst Hummel */ 1494f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, 1495f3eb5384SStefan Weinhuber int enable_pav) 149640545573SHorst Hummel { 149740545573SHorst Hummel struct dasd_ccw_req *cqr; 149840545573SHorst Hummel struct dasd_psf_ssc_data *psf_ssc_data; 149940545573SHorst Hummel struct ccw1 *ccw; 150040545573SHorst Hummel 150168b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 150240545573SHorst Hummel sizeof(struct dasd_psf_ssc_data), 150340545573SHorst Hummel device); 150440545573SHorst Hummel 150540545573SHorst Hummel if (IS_ERR(cqr)) { 1506fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 150740545573SHorst Hummel "Could not allocate PSF-SSC request"); 150840545573SHorst Hummel return cqr; 150940545573SHorst Hummel } 151040545573SHorst Hummel psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 151140545573SHorst Hummel psf_ssc_data->order = PSF_ORDER_SSC; 1512626350b6SStefan Weinhuber psf_ssc_data->suborder = 0xc0; 1513f3eb5384SStefan Weinhuber if (enable_pav) { 1514626350b6SStefan Weinhuber psf_ssc_data->suborder |= 0x08; 15158e09f215SStefan Weinhuber psf_ssc_data->reserved[0] = 0x88; 1516f3eb5384SStefan Weinhuber } 151740545573SHorst Hummel ccw = cqr->cpaddr; 151840545573SHorst Hummel ccw->cmd_code = DASD_ECKD_CCW_PSF; 151940545573SHorst Hummel ccw->cda = (__u32)(addr_t)psf_ssc_data; 152040545573SHorst Hummel ccw->count = 66; 152140545573SHorst Hummel 15228e09f215SStefan Weinhuber cqr->startdev = device; 15238e09f215SStefan Weinhuber cqr->memdev = device; 15248e09f215SStefan Weinhuber cqr->block = NULL; 1525eb6e199bSStefan Weinhuber cqr->retries = 256; 152640545573SHorst Hummel cqr->expires = 10*HZ; 15271aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 152840545573SHorst Hummel cqr->status = DASD_CQR_FILLED; 152940545573SHorst Hummel return cqr; 153040545573SHorst Hummel } 153140545573SHorst Hummel 153240545573SHorst Hummel /* 153340545573SHorst Hummel * Perform Subsystem Function. 153440545573SHorst Hummel * It is necessary to trigger CIO for channel revalidation since this 153540545573SHorst Hummel * call might change behaviour of DASD devices. 153640545573SHorst Hummel */ 153740545573SHorst Hummel static int 153812d7b107SStefan Haberland dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav, 153912d7b107SStefan Haberland unsigned long flags) 154040545573SHorst Hummel { 154140545573SHorst Hummel struct dasd_ccw_req *cqr; 154240545573SHorst Hummel int rc; 154340545573SHorst Hummel 1544f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_psf_ssc(device, enable_pav); 154540545573SHorst Hummel if (IS_ERR(cqr)) 154640545573SHorst Hummel return PTR_ERR(cqr); 154740545573SHorst Hummel 154812d7b107SStefan Haberland /* 154912d7b107SStefan Haberland * set flags e.g. turn on failfast, to prevent blocking 155012d7b107SStefan Haberland * the calling function should handle failed requests 155112d7b107SStefan Haberland */ 155212d7b107SStefan Haberland cqr->flags |= flags; 155312d7b107SStefan Haberland 155440545573SHorst Hummel rc = dasd_sleep_on(cqr); 155540545573SHorst Hummel if (!rc) 155640545573SHorst Hummel /* trigger CIO to reprobe devices */ 155740545573SHorst Hummel css_schedule_reprobe(); 155812d7b107SStefan Haberland else if (cqr->intrc == -EAGAIN) 155912d7b107SStefan Haberland rc = -EAGAIN; 156012d7b107SStefan Haberland 15618e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 156240545573SHorst Hummel return rc; 156340545573SHorst Hummel } 156440545573SHorst Hummel 156540545573SHorst Hummel /* 156640545573SHorst Hummel * Valide storage server of current device. 156740545573SHorst Hummel */ 156812d7b107SStefan Haberland static int dasd_eckd_validate_server(struct dasd_device *device, 156912d7b107SStefan Haberland unsigned long flags) 157040545573SHorst Hummel { 1571543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1572543691a4SSebastian Ott int enable_pav, rc; 157340545573SHorst Hummel 1574f9f8d02fSStefan Haberland if (private->uid.type == UA_BASE_PAV_ALIAS || 1575f9f8d02fSStefan Haberland private->uid.type == UA_HYPER_PAV_ALIAS) 157612d7b107SStefan Haberland return 0; 157740545573SHorst Hummel if (dasd_nopav || MACHINE_IS_VM) 1578f3eb5384SStefan Weinhuber enable_pav = 0; 1579f3eb5384SStefan Weinhuber else 1580f3eb5384SStefan Weinhuber enable_pav = 1; 158112d7b107SStefan Haberland rc = dasd_eckd_psf_ssc(device, enable_pav, flags); 1582eb6e199bSStefan Weinhuber 158340545573SHorst Hummel /* may be requested feature is not available on server, 158440545573SHorst Hummel * therefore just report error and go ahead */ 1585b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " 1586b8ed5dd5SStefan Haberland "returned rc=%d", private->uid.ssid, rc); 158712d7b107SStefan Haberland return rc; 158840545573SHorst Hummel } 158940545573SHorst Hummel 1590f1633031SStefan Haberland /* 1591f1633031SStefan Haberland * worker to do a validate server in case of a lost pathgroup 1592f1633031SStefan Haberland */ 1593f1633031SStefan Haberland static void dasd_eckd_do_validate_server(struct work_struct *work) 1594f1633031SStefan Haberland { 1595f1633031SStefan Haberland struct dasd_device *device = container_of(work, struct dasd_device, 1596f1633031SStefan Haberland kick_validate); 1597ea4da6eaSStefan Haberland unsigned long flags = 0; 1598ea4da6eaSStefan Haberland 1599ea4da6eaSStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &flags); 1600ea4da6eaSStefan Haberland if (dasd_eckd_validate_server(device, flags) 160112d7b107SStefan Haberland == -EAGAIN) { 160212d7b107SStefan Haberland /* schedule worker again if failed */ 160312d7b107SStefan Haberland schedule_work(&device->kick_validate); 160412d7b107SStefan Haberland return; 160512d7b107SStefan Haberland } 160612d7b107SStefan Haberland 1607f1633031SStefan Haberland dasd_put_device(device); 1608f1633031SStefan Haberland } 1609f1633031SStefan Haberland 1610f1633031SStefan Haberland static void dasd_eckd_kick_validate_server(struct dasd_device *device) 1611f1633031SStefan Haberland { 1612f1633031SStefan Haberland dasd_get_device(device); 161325e2cf1cSStefan Haberland /* exit if device not online or in offline processing */ 161425e2cf1cSStefan Haberland if (test_bit(DASD_FLAG_OFFLINE, &device->flags) || 161525e2cf1cSStefan Haberland device->state < DASD_STATE_ONLINE) { 161625e2cf1cSStefan Haberland dasd_put_device(device); 161725e2cf1cSStefan Haberland return; 161825e2cf1cSStefan Haberland } 1619f1633031SStefan Haberland /* queue call to do_validate_server to the kernel event daemon. */ 1620f2608cd4SStefan Haberland if (!schedule_work(&device->kick_validate)) 1621f2608cd4SStefan Haberland dasd_put_device(device); 1622f1633031SStefan Haberland } 1623f1633031SStefan Haberland 162440545573SHorst Hummel /* 16253d052595SHorst Hummel * Check device characteristics. 16263d052595SHorst Hummel * If the device is accessible using ECKD discipline, the device is enabled. 16273d052595SHorst Hummel */ 16281da177e4SLinus Torvalds static int 16291da177e4SLinus Torvalds dasd_eckd_check_characteristics(struct dasd_device *device) 16301da177e4SLinus Torvalds { 1631543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 16328e09f215SStefan Weinhuber struct dasd_block *block; 16332dedf0d9SStefan Haberland struct dasd_uid temp_uid; 1634f9f8d02fSStefan Haberland int rc, i; 163533b62a30SStefan Weinhuber int readonly; 16367c8faa86SStefan Haberland unsigned long value; 16371da177e4SLinus Torvalds 1638f1633031SStefan Haberland /* setup work queue for validate server*/ 1639f1633031SStefan Haberland INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server); 164059a9ed5fSStefan Haberland /* setup work queue for summary unit check */ 164159a9ed5fSStefan Haberland INIT_WORK(&device->suc_work, dasd_alias_handle_summary_unit_check); 1642f1633031SStefan Haberland 1643454e1fa1SPeter Oberparleiter if (!ccw_device_is_pathgroup(device->cdev)) { 1644454e1fa1SPeter Oberparleiter dev_warn(&device->cdev->dev, 1645454e1fa1SPeter Oberparleiter "A channel path group could not be established\n"); 1646454e1fa1SPeter Oberparleiter return -EIO; 1647454e1fa1SPeter Oberparleiter } 1648454e1fa1SPeter Oberparleiter if (!ccw_device_is_multipath(device->cdev)) { 1649454e1fa1SPeter Oberparleiter dev_info(&device->cdev->dev, 1650454e1fa1SPeter Oberparleiter "The DASD is not operating in multipath mode\n"); 1651454e1fa1SPeter Oberparleiter } 165292636b15SSebastian Ott if (!private) { 165392636b15SSebastian Ott private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); 165492636b15SSebastian Ott if (!private) { 1655fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1656fc19f381SStefan Haberland "Allocating memory for private DASD data " 1657fc19f381SStefan Haberland "failed\n"); 16581da177e4SLinus Torvalds return -ENOMEM; 16591da177e4SLinus Torvalds } 1660543691a4SSebastian Ott device->private = private; 166192636b15SSebastian Ott } else { 166292636b15SSebastian Ott memset(private, 0, sizeof(*private)); 16631da177e4SLinus Torvalds } 16641da177e4SLinus Torvalds /* Invalidate status of initial analysis. */ 16651da177e4SLinus Torvalds private->init_cqr_status = -1; 16661da177e4SLinus Torvalds /* Set default cache operations. */ 16671da177e4SLinus Torvalds private->attrib.operation = DASD_NORMAL_CACHE; 16681da177e4SLinus Torvalds private->attrib.nr_cyl = 0; 16691da177e4SLinus Torvalds 167040545573SHorst Hummel /* Read Configuration Data */ 167140545573SHorst Hummel rc = dasd_eckd_read_conf(device); 167240545573SHorst Hummel if (rc) 16738e09f215SStefan Weinhuber goto out_err1; 167440545573SHorst Hummel 1675a521b048SStefan Haberland /* set some default values */ 16767c8faa86SStefan Haberland device->default_expires = DASD_EXPIRES; 16771f1ee9adSHannes Reinecke device->default_retries = DASD_RETRIES; 1678a521b048SStefan Haberland device->path_thrhld = DASD_ECKD_PATH_THRHLD; 1679a521b048SStefan Haberland device->path_interval = DASD_ECKD_PATH_INTERVAL; 16801f1ee9adSHannes Reinecke 16817c8faa86SStefan Haberland if (private->gneq) { 16827c8faa86SStefan Haberland value = 1; 16837c8faa86SStefan Haberland for (i = 0; i < private->gneq->timeout.value; i++) 16847c8faa86SStefan Haberland value = 10 * value; 16857c8faa86SStefan Haberland value = value * private->gneq->timeout.number; 16867c8faa86SStefan Haberland /* do not accept useless values */ 16877c8faa86SStefan Haberland if (value != 0 && value <= DASD_EXPIRES_MAX) 16887c8faa86SStefan Haberland device->default_expires = value; 16897c8faa86SStefan Haberland } 16907c8faa86SStefan Haberland 16912dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 16922dedf0d9SStefan Haberland if (temp_uid.type == UA_BASE_DEVICE) { 16938e09f215SStefan Weinhuber block = dasd_alloc_block(); 16948e09f215SStefan Weinhuber if (IS_ERR(block)) { 1695b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1696b8ed5dd5SStefan Haberland "could not allocate dasd " 1697b8ed5dd5SStefan Haberland "block structure"); 16988e09f215SStefan Weinhuber rc = PTR_ERR(block); 16998e09f215SStefan Weinhuber goto out_err1; 17008e09f215SStefan Weinhuber } 17018e09f215SStefan Weinhuber device->block = block; 17028e09f215SStefan Weinhuber block->base = device; 17038e09f215SStefan Weinhuber } 17048e09f215SStefan Weinhuber 1705f9f8d02fSStefan Haberland /* register lcu with alias handling, enable PAV */ 1706f9f8d02fSStefan Haberland rc = dasd_alias_make_device_known_to_lcu(device); 1707f9f8d02fSStefan Haberland if (rc) 17088e09f215SStefan Weinhuber goto out_err2; 1709f9f8d02fSStefan Haberland 171012d7b107SStefan Haberland dasd_eckd_validate_server(device, 0); 1711f4ac1d02SStefan Weinhuber 1712f4ac1d02SStefan Weinhuber /* device may report different configuration data after LCU setup */ 1713f4ac1d02SStefan Weinhuber rc = dasd_eckd_read_conf(device); 171440545573SHorst Hummel if (rc) 17158e09f215SStefan Weinhuber goto out_err3; 17168e09f215SStefan Weinhuber 17178e09f215SStefan Weinhuber /* Read Feature Codes */ 171868d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 171940545573SHorst Hummel 17201da177e4SLinus Torvalds /* Read Device Characteristics */ 172168b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 172268b781feSStefan Haberland &private->rdc_data, 64); 17238e09f215SStefan Weinhuber if (rc) { 1724b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1725b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 17268e09f215SStefan Weinhuber goto out_err3; 17278e09f215SStefan Weinhuber } 172834cd551aSStefan Haberland 172934cd551aSStefan Haberland if ((device->features & DASD_FEATURE_USERAW) && 173034cd551aSStefan Haberland !(private->rdc_data.facilities.RT_in_LR)) { 173134cd551aSStefan Haberland dev_err(&device->cdev->dev, "The storage server does not " 173234cd551aSStefan Haberland "support raw-track access\n"); 173334cd551aSStefan Haberland rc = -EINVAL; 173434cd551aSStefan Haberland goto out_err3; 173534cd551aSStefan Haberland } 173634cd551aSStefan Haberland 1737817f2c84SNikanth Karthikesan /* find the valid cylinder size */ 1738b44b0ab3SStefan Weinhuber if (private->rdc_data.no_cyl == LV_COMPAT_CYL && 1739b44b0ab3SStefan Weinhuber private->rdc_data.long_no_cyl) 1740b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.long_no_cyl; 1741b44b0ab3SStefan Weinhuber else 1742b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.no_cyl; 1743b44b0ab3SStefan Weinhuber 1744ef19298bSStefan Weinhuber private->fcx_max_data = get_fcx_max_data(device); 1745ef19298bSStefan Weinhuber 174633b62a30SStefan Weinhuber readonly = dasd_device_is_ro(device); 174733b62a30SStefan Weinhuber if (readonly) 174833b62a30SStefan Weinhuber set_bit(DASD_FLAG_DEVICE_RO, &device->flags); 174933b62a30SStefan Weinhuber 1750fc19f381SStefan Haberland dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " 175133b62a30SStefan Weinhuber "with %d cylinders, %d heads, %d sectors%s\n", 17521da177e4SLinus Torvalds private->rdc_data.dev_type, 17531da177e4SLinus Torvalds private->rdc_data.dev_model, 17541da177e4SLinus Torvalds private->rdc_data.cu_type, 17551da177e4SLinus Torvalds private->rdc_data.cu_model.model, 1756b44b0ab3SStefan Weinhuber private->real_cyl, 17571da177e4SLinus Torvalds private->rdc_data.trk_per_cyl, 175833b62a30SStefan Weinhuber private->rdc_data.sec_per_trk, 175933b62a30SStefan Weinhuber readonly ? ", read-only device" : ""); 17608e09f215SStefan Weinhuber return 0; 17618e09f215SStefan Weinhuber 17628e09f215SStefan Weinhuber out_err3: 17638e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 17648e09f215SStefan Weinhuber out_err2: 17658e09f215SStefan Weinhuber dasd_free_block(device->block); 17668e09f215SStefan Weinhuber device->block = NULL; 17678e09f215SStefan Weinhuber out_err1: 17684abb08c2SStefan Weinhuber kfree(private->conf_data); 17698e09f215SStefan Weinhuber kfree(device->private); 17708e09f215SStefan Weinhuber device->private = NULL; 17713d052595SHorst Hummel return rc; 17721da177e4SLinus Torvalds } 17731da177e4SLinus Torvalds 17748e09f215SStefan Weinhuber static void dasd_eckd_uncheck_device(struct dasd_device *device) 17758e09f215SStefan Weinhuber { 1776543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1777b179b037SStefan Haberland int i; 17784abb08c2SStefan Weinhuber 17798e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 17804abb08c2SStefan Weinhuber private->ned = NULL; 17814abb08c2SStefan Weinhuber private->sneq = NULL; 17824abb08c2SStefan Weinhuber private->vdsneq = NULL; 17834abb08c2SStefan Weinhuber private->gneq = NULL; 17844abb08c2SStefan Weinhuber private->conf_len = 0; 1785b179b037SStefan Haberland for (i = 0; i < 8; i++) { 1786c9346151SStefan Haberland kfree(device->path[i].conf_data); 1787c9346151SStefan Haberland if ((__u8 *)device->path[i].conf_data == 1788b179b037SStefan Haberland private->conf_data) { 1789b179b037SStefan Haberland private->conf_data = NULL; 1790b179b037SStefan Haberland private->conf_len = 0; 1791b179b037SStefan Haberland } 1792c9346151SStefan Haberland device->path[i].conf_data = NULL; 1793a521b048SStefan Haberland device->path[i].cssid = 0; 1794a521b048SStefan Haberland device->path[i].ssid = 0; 1795a521b048SStefan Haberland device->path[i].chpid = 0; 1796b179b037SStefan Haberland } 17974abb08c2SStefan Weinhuber kfree(private->conf_data); 17984abb08c2SStefan Weinhuber private->conf_data = NULL; 17998e09f215SStefan Weinhuber } 18008e09f215SStefan Weinhuber 18011da177e4SLinus Torvalds static struct dasd_ccw_req * 18021da177e4SLinus Torvalds dasd_eckd_analysis_ccw(struct dasd_device *device) 18031da177e4SLinus Torvalds { 1804543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 18051da177e4SLinus Torvalds struct eckd_count *count_data; 18061da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 18071da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 18081da177e4SLinus Torvalds struct ccw1 *ccw; 18091da177e4SLinus Torvalds int cplength, datasize; 18101da177e4SLinus Torvalds int i; 18111da177e4SLinus Torvalds 18121da177e4SLinus Torvalds cplength = 8; 18131da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 181468b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 18151da177e4SLinus Torvalds if (IS_ERR(cqr)) 18161da177e4SLinus Torvalds return cqr; 18171da177e4SLinus Torvalds ccw = cqr->cpaddr; 18181da177e4SLinus Torvalds /* Define extent for the first 3 tracks. */ 18191da177e4SLinus Torvalds define_extent(ccw++, cqr->data, 0, 2, 182045f186beSJan Höppner DASD_ECKD_CCW_READ_COUNT, device, 0); 18211da177e4SLinus Torvalds LO_data = cqr->data + sizeof(struct DE_eckd_data); 18221da177e4SLinus Torvalds /* Locate record for the first 4 records on track 0. */ 18231da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18241da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 0, 0, 4, 18251da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 18261da177e4SLinus Torvalds 18271da177e4SLinus Torvalds count_data = private->count_area; 18281da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 18291da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18301da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 18311da177e4SLinus Torvalds ccw->flags = 0; 18321da177e4SLinus Torvalds ccw->count = 8; 18331da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 18341da177e4SLinus Torvalds ccw++; 18351da177e4SLinus Torvalds count_data++; 18361da177e4SLinus Torvalds } 18371da177e4SLinus Torvalds 18381da177e4SLinus Torvalds /* Locate record for the first record on track 2. */ 18391da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18401da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 2, 0, 1, 18411da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 18421da177e4SLinus Torvalds /* Read count ccw. */ 18431da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18441da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 18451da177e4SLinus Torvalds ccw->flags = 0; 18461da177e4SLinus Torvalds ccw->count = 8; 18471da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 18481da177e4SLinus Torvalds 18498e09f215SStefan Weinhuber cqr->block = NULL; 18508e09f215SStefan Weinhuber cqr->startdev = device; 18518e09f215SStefan Weinhuber cqr->memdev = device; 1852eb6e199bSStefan Weinhuber cqr->retries = 255; 18531aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 18541da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 18551da177e4SLinus Torvalds return cqr; 18561da177e4SLinus Torvalds } 18571da177e4SLinus Torvalds 1858eb6e199bSStefan Weinhuber /* differentiate between 'no record found' and any other error */ 1859eb6e199bSStefan Weinhuber static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) 1860eb6e199bSStefan Weinhuber { 1861eb6e199bSStefan Weinhuber char *sense; 1862eb6e199bSStefan Weinhuber if (init_cqr->status == DASD_CQR_DONE) 1863eb6e199bSStefan Weinhuber return INIT_CQR_OK; 1864eb6e199bSStefan Weinhuber else if (init_cqr->status == DASD_CQR_NEED_ERP || 1865eb6e199bSStefan Weinhuber init_cqr->status == DASD_CQR_FAILED) { 1866eb6e199bSStefan Weinhuber sense = dasd_get_sense(&init_cqr->irb); 1867eb6e199bSStefan Weinhuber if (sense && (sense[1] & SNS1_NO_REC_FOUND)) 1868eb6e199bSStefan Weinhuber return INIT_CQR_UNFORMATTED; 1869eb6e199bSStefan Weinhuber else 1870eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 1871eb6e199bSStefan Weinhuber } else 1872eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 1873eb6e199bSStefan Weinhuber } 1874eb6e199bSStefan Weinhuber 18751da177e4SLinus Torvalds /* 18761da177e4SLinus Torvalds * This is the callback function for the init_analysis cqr. It saves 18771da177e4SLinus Torvalds * the status of the initial analysis ccw before it frees it and kicks 18781da177e4SLinus Torvalds * the device to continue the startup sequence. This will call 18791da177e4SLinus Torvalds * dasd_eckd_do_analysis again (if the devices has not been marked 18801da177e4SLinus Torvalds * for deletion in the meantime). 18811da177e4SLinus Torvalds */ 1882eb6e199bSStefan Weinhuber static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, 1883eb6e199bSStefan Weinhuber void *data) 18841da177e4SLinus Torvalds { 1885543691a4SSebastian Ott struct dasd_device *device = init_cqr->startdev; 1886543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 18871da177e4SLinus Torvalds 1888eb6e199bSStefan Weinhuber private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); 18891da177e4SLinus Torvalds dasd_sfree_request(init_cqr, device); 18901da177e4SLinus Torvalds dasd_kick_device(device); 18911da177e4SLinus Torvalds } 18921da177e4SLinus Torvalds 1893eb6e199bSStefan Weinhuber static int dasd_eckd_start_analysis(struct dasd_block *block) 18941da177e4SLinus Torvalds { 18951da177e4SLinus Torvalds struct dasd_ccw_req *init_cqr; 18961da177e4SLinus Torvalds 18978e09f215SStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(block->base); 18981da177e4SLinus Torvalds if (IS_ERR(init_cqr)) 18991da177e4SLinus Torvalds return PTR_ERR(init_cqr); 19001da177e4SLinus Torvalds init_cqr->callback = dasd_eckd_analysis_callback; 19011da177e4SLinus Torvalds init_cqr->callback_data = NULL; 19021da177e4SLinus Torvalds init_cqr->expires = 5*HZ; 1903eb6e199bSStefan Weinhuber /* first try without ERP, so we can later handle unformatted 1904eb6e199bSStefan Weinhuber * devices as special case 1905eb6e199bSStefan Weinhuber */ 1906eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); 1907eb6e199bSStefan Weinhuber init_cqr->retries = 0; 19081da177e4SLinus Torvalds dasd_add_request_head(init_cqr); 19091da177e4SLinus Torvalds return -EAGAIN; 19101da177e4SLinus Torvalds } 19111da177e4SLinus Torvalds 1912eb6e199bSStefan Weinhuber static int dasd_eckd_end_analysis(struct dasd_block *block) 19131da177e4SLinus Torvalds { 1914543691a4SSebastian Ott struct dasd_device *device = block->base; 1915543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 19161da177e4SLinus Torvalds struct eckd_count *count_area; 19171da177e4SLinus Torvalds unsigned int sb, blk_per_trk; 19181da177e4SLinus Torvalds int status, i; 1919eb6e199bSStefan Weinhuber struct dasd_ccw_req *init_cqr; 19201da177e4SLinus Torvalds 19211da177e4SLinus Torvalds status = private->init_cqr_status; 19221da177e4SLinus Torvalds private->init_cqr_status = -1; 1923eb6e199bSStefan Weinhuber if (status == INIT_CQR_ERROR) { 1924eb6e199bSStefan Weinhuber /* try again, this time with full ERP */ 1925eb6e199bSStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(device); 1926eb6e199bSStefan Weinhuber dasd_sleep_on(init_cqr); 1927eb6e199bSStefan Weinhuber status = dasd_eckd_analysis_evaluation(init_cqr); 1928eb6e199bSStefan Weinhuber dasd_sfree_request(init_cqr, device); 1929eb6e199bSStefan Weinhuber } 1930eb6e199bSStefan Weinhuber 1931e4dbb0f2SStefan Haberland if (device->features & DASD_FEATURE_USERAW) { 1932e4dbb0f2SStefan Haberland block->bp_block = DASD_RAW_BLOCKSIZE; 1933e4dbb0f2SStefan Haberland blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; 1934e4dbb0f2SStefan Haberland block->s2b_shift = 3; 1935e4dbb0f2SStefan Haberland goto raw; 1936e4dbb0f2SStefan Haberland } 1937e4dbb0f2SStefan Haberland 1938eb6e199bSStefan Weinhuber if (status == INIT_CQR_UNFORMATTED) { 1939eb6e199bSStefan Weinhuber dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); 19401da177e4SLinus Torvalds return -EMEDIUMTYPE; 1941eb6e199bSStefan Weinhuber } else if (status == INIT_CQR_ERROR) { 1942eb6e199bSStefan Weinhuber dev_err(&device->cdev->dev, 1943eb6e199bSStefan Weinhuber "Detecting the DASD disk layout failed because " 1944eb6e199bSStefan Weinhuber "of an I/O error\n"); 1945eb6e199bSStefan Weinhuber return -EIO; 19461da177e4SLinus Torvalds } 19471da177e4SLinus Torvalds 19481da177e4SLinus Torvalds private->uses_cdl = 1; 19491da177e4SLinus Torvalds /* Check Track 0 for Compatible Disk Layout */ 19501da177e4SLinus Torvalds count_area = NULL; 19511da177e4SLinus Torvalds for (i = 0; i < 3; i++) { 19521da177e4SLinus Torvalds if (private->count_area[i].kl != 4 || 19533bc9fef9SStefan Haberland private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 || 19543bc9fef9SStefan Haberland private->count_area[i].cyl != 0 || 19553bc9fef9SStefan Haberland private->count_area[i].head != count_area_head[i] || 19563bc9fef9SStefan Haberland private->count_area[i].record != count_area_rec[i]) { 19571da177e4SLinus Torvalds private->uses_cdl = 0; 19581da177e4SLinus Torvalds break; 19591da177e4SLinus Torvalds } 19601da177e4SLinus Torvalds } 19611da177e4SLinus Torvalds if (i == 3) 19621da177e4SLinus Torvalds count_area = &private->count_area[4]; 19631da177e4SLinus Torvalds 19641da177e4SLinus Torvalds if (private->uses_cdl == 0) { 19651da177e4SLinus Torvalds for (i = 0; i < 5; i++) { 19661da177e4SLinus Torvalds if ((private->count_area[i].kl != 0) || 19671da177e4SLinus Torvalds (private->count_area[i].dl != 19683bc9fef9SStefan Haberland private->count_area[0].dl) || 19693bc9fef9SStefan Haberland private->count_area[i].cyl != 0 || 19703bc9fef9SStefan Haberland private->count_area[i].head != count_area_head[i] || 19713bc9fef9SStefan Haberland private->count_area[i].record != count_area_rec[i]) 19721da177e4SLinus Torvalds break; 19731da177e4SLinus Torvalds } 19741da177e4SLinus Torvalds if (i == 5) 19751da177e4SLinus Torvalds count_area = &private->count_area[0]; 19761da177e4SLinus Torvalds } else { 19771da177e4SLinus Torvalds if (private->count_area[3].record == 1) 1978fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1979fc19f381SStefan Haberland "Track 0 has no records following the VTOC\n"); 19801da177e4SLinus Torvalds } 1981e4dbb0f2SStefan Haberland 19821da177e4SLinus Torvalds if (count_area != NULL && count_area->kl == 0) { 19831da177e4SLinus Torvalds /* we found notthing violating our disk layout */ 19841da177e4SLinus Torvalds if (dasd_check_blocksize(count_area->dl) == 0) 19858e09f215SStefan Weinhuber block->bp_block = count_area->dl; 19861da177e4SLinus Torvalds } 19878e09f215SStefan Weinhuber if (block->bp_block == 0) { 1988fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1989fc19f381SStefan Haberland "The disk layout of the DASD is not supported\n"); 19901da177e4SLinus Torvalds return -EMEDIUMTYPE; 19911da177e4SLinus Torvalds } 19928e09f215SStefan Weinhuber block->s2b_shift = 0; /* bits to shift 512 to get a block */ 19938e09f215SStefan Weinhuber for (sb = 512; sb < block->bp_block; sb = sb << 1) 19948e09f215SStefan Weinhuber block->s2b_shift++; 19951da177e4SLinus Torvalds 19968e09f215SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 1997e4dbb0f2SStefan Haberland 1998e4dbb0f2SStefan Haberland raw: 1999b44b0ab3SStefan Weinhuber block->blocks = (private->real_cyl * 20001da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 20011da177e4SLinus Torvalds blk_per_trk); 20021da177e4SLinus Torvalds 2003fc19f381SStefan Haberland dev_info(&device->cdev->dev, 2004fc19f381SStefan Haberland "DASD with %d KB/block, %d KB total size, %d KB/track, " 2005fc19f381SStefan Haberland "%s\n", (block->bp_block >> 10), 2006b44b0ab3SStefan Weinhuber ((private->real_cyl * 20071da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 20088e09f215SStefan Weinhuber blk_per_trk * (block->bp_block >> 9)) >> 1), 20098e09f215SStefan Weinhuber ((blk_per_trk * block->bp_block) >> 10), 20101da177e4SLinus Torvalds private->uses_cdl ? 20111da177e4SLinus Torvalds "compatible disk layout" : "linux disk layout"); 20121da177e4SLinus Torvalds 20131da177e4SLinus Torvalds return 0; 20141da177e4SLinus Torvalds } 20151da177e4SLinus Torvalds 20168e09f215SStefan Weinhuber static int dasd_eckd_do_analysis(struct dasd_block *block) 20171da177e4SLinus Torvalds { 2018543691a4SSebastian Ott struct dasd_eckd_private *private = block->base->private; 20191da177e4SLinus Torvalds 20201da177e4SLinus Torvalds if (private->init_cqr_status < 0) 20218e09f215SStefan Weinhuber return dasd_eckd_start_analysis(block); 20221da177e4SLinus Torvalds else 20238e09f215SStefan Weinhuber return dasd_eckd_end_analysis(block); 20241da177e4SLinus Torvalds } 20251da177e4SLinus Torvalds 2026d42e1712SStefan Haberland static int dasd_eckd_basic_to_ready(struct dasd_device *device) 20278e09f215SStefan Weinhuber { 20288e09f215SStefan Weinhuber return dasd_alias_add_device(device); 20298e09f215SStefan Weinhuber }; 20308e09f215SStefan Weinhuber 20318e09f215SStefan Weinhuber static int dasd_eckd_online_to_ready(struct dasd_device *device) 20328e09f215SStefan Weinhuber { 2033501183f2SStefan Haberland cancel_work_sync(&device->reload_device); 203425e2cf1cSStefan Haberland cancel_work_sync(&device->kick_validate); 2035d42e1712SStefan Haberland return 0; 2036d42e1712SStefan Haberland }; 2037d42e1712SStefan Haberland 2038daa991bfSStefan Haberland static int dasd_eckd_basic_to_known(struct dasd_device *device) 2039d42e1712SStefan Haberland { 20408e09f215SStefan Weinhuber return dasd_alias_remove_device(device); 20418e09f215SStefan Weinhuber }; 20428e09f215SStefan Weinhuber 20431da177e4SLinus Torvalds static int 20448e09f215SStefan Weinhuber dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 20451da177e4SLinus Torvalds { 2046543691a4SSebastian Ott struct dasd_eckd_private *private = block->base->private; 20471da177e4SLinus Torvalds 20488e09f215SStefan Weinhuber if (dasd_check_blocksize(block->bp_block) == 0) { 20491da177e4SLinus Torvalds geo->sectors = recs_per_track(&private->rdc_data, 20508e09f215SStefan Weinhuber 0, block->bp_block); 20511da177e4SLinus Torvalds } 20521da177e4SLinus Torvalds geo->cylinders = private->rdc_data.no_cyl; 20531da177e4SLinus Torvalds geo->heads = private->rdc_data.trk_per_cyl; 20541da177e4SLinus Torvalds return 0; 20551da177e4SLinus Torvalds } 20561da177e4SLinus Torvalds 20578fd57520SJan Höppner /* 20588fd57520SJan Höppner * Build the TCW request for the format check 20598fd57520SJan Höppner */ 20608fd57520SJan Höppner static struct dasd_ccw_req * 20618fd57520SJan Höppner dasd_eckd_build_check_tcw(struct dasd_device *base, struct format_data_t *fdata, 20628fd57520SJan Höppner int enable_pav, struct eckd_count *fmt_buffer, 20638fd57520SJan Höppner int rpt) 20648fd57520SJan Höppner { 20658fd57520SJan Höppner struct dasd_eckd_private *start_priv; 20668fd57520SJan Höppner struct dasd_device *startdev = NULL; 20678fd57520SJan Höppner struct tidaw *last_tidaw = NULL; 20688fd57520SJan Höppner struct dasd_ccw_req *cqr; 20698fd57520SJan Höppner struct itcw *itcw; 20708fd57520SJan Höppner int itcw_size; 20718fd57520SJan Höppner int count; 20728fd57520SJan Höppner int rc; 20738fd57520SJan Höppner int i; 20748fd57520SJan Höppner 20758fd57520SJan Höppner if (enable_pav) 20768fd57520SJan Höppner startdev = dasd_alias_get_start_dev(base); 20778fd57520SJan Höppner 20788fd57520SJan Höppner if (!startdev) 20798fd57520SJan Höppner startdev = base; 20808fd57520SJan Höppner 20818fd57520SJan Höppner start_priv = startdev->private; 20828fd57520SJan Höppner 20838fd57520SJan Höppner count = rpt * (fdata->stop_unit - fdata->start_unit + 1); 20848fd57520SJan Höppner 20858fd57520SJan Höppner /* 20868fd57520SJan Höppner * we're adding 'count' amount of tidaw to the itcw. 20878fd57520SJan Höppner * calculate the corresponding itcw_size 20888fd57520SJan Höppner */ 20898fd57520SJan Höppner itcw_size = itcw_calc_size(0, count, 0); 20908fd57520SJan Höppner 20918fd57520SJan Höppner cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 20928fd57520SJan Höppner if (IS_ERR(cqr)) 20938fd57520SJan Höppner return cqr; 20948fd57520SJan Höppner 20958fd57520SJan Höppner start_priv->count++; 20968fd57520SJan Höppner 20978fd57520SJan Höppner itcw = itcw_init(cqr->data, itcw_size, ITCW_OP_READ, 0, count, 0); 20988fd57520SJan Höppner if (IS_ERR(itcw)) { 20998fd57520SJan Höppner rc = -EINVAL; 21008fd57520SJan Höppner goto out_err; 21018fd57520SJan Höppner } 21028fd57520SJan Höppner 21038fd57520SJan Höppner cqr->cpaddr = itcw_get_tcw(itcw); 21048fd57520SJan Höppner rc = prepare_itcw(itcw, fdata->start_unit, fdata->stop_unit, 21058fd57520SJan Höppner DASD_ECKD_CCW_READ_COUNT_MT, base, startdev, 0, count, 21068fd57520SJan Höppner sizeof(struct eckd_count), 21078fd57520SJan Höppner count * sizeof(struct eckd_count), 0, rpt); 21088fd57520SJan Höppner if (rc) 21098fd57520SJan Höppner goto out_err; 21108fd57520SJan Höppner 21118fd57520SJan Höppner for (i = 0; i < count; i++) { 21128fd57520SJan Höppner last_tidaw = itcw_add_tidaw(itcw, 0, fmt_buffer++, 21138fd57520SJan Höppner sizeof(struct eckd_count)); 21148fd57520SJan Höppner if (IS_ERR(last_tidaw)) { 21158fd57520SJan Höppner rc = -EINVAL; 21168fd57520SJan Höppner goto out_err; 21178fd57520SJan Höppner } 21188fd57520SJan Höppner } 21198fd57520SJan Höppner 21208fd57520SJan Höppner last_tidaw->flags |= TIDAW_FLAGS_LAST; 21218fd57520SJan Höppner itcw_finalize(itcw); 21228fd57520SJan Höppner 21238fd57520SJan Höppner cqr->cpmode = 1; 21248fd57520SJan Höppner cqr->startdev = startdev; 21258fd57520SJan Höppner cqr->memdev = startdev; 21268fd57520SJan Höppner cqr->basedev = base; 21278fd57520SJan Höppner cqr->retries = startdev->default_retries; 21288fd57520SJan Höppner cqr->expires = startdev->default_expires * HZ; 21298fd57520SJan Höppner cqr->buildclk = get_tod_clock(); 21308fd57520SJan Höppner cqr->status = DASD_CQR_FILLED; 21318fd57520SJan Höppner /* Set flags to suppress output for expected errors */ 21328fd57520SJan Höppner set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); 21338fd57520SJan Höppner set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); 21348fd57520SJan Höppner 21358fd57520SJan Höppner return cqr; 21368fd57520SJan Höppner 21378fd57520SJan Höppner out_err: 21388fd57520SJan Höppner dasd_sfree_request(cqr, startdev); 21398fd57520SJan Höppner 21408fd57520SJan Höppner return ERR_PTR(rc); 21418fd57520SJan Höppner } 21428fd57520SJan Höppner 21438fd57520SJan Höppner /* 21448fd57520SJan Höppner * Build the CCW request for the format check 21458fd57520SJan Höppner */ 21468fd57520SJan Höppner static struct dasd_ccw_req * 21478fd57520SJan Höppner dasd_eckd_build_check(struct dasd_device *base, struct format_data_t *fdata, 21488fd57520SJan Höppner int enable_pav, struct eckd_count *fmt_buffer, int rpt) 21498fd57520SJan Höppner { 21508fd57520SJan Höppner struct dasd_eckd_private *start_priv; 21518fd57520SJan Höppner struct dasd_eckd_private *base_priv; 21528fd57520SJan Höppner struct dasd_device *startdev = NULL; 21538fd57520SJan Höppner struct dasd_ccw_req *cqr; 21548fd57520SJan Höppner struct ccw1 *ccw; 21558fd57520SJan Höppner void *data; 21568fd57520SJan Höppner int cplength, datasize; 21578fd57520SJan Höppner int use_prefix; 21588fd57520SJan Höppner int count; 21598fd57520SJan Höppner int i; 21608fd57520SJan Höppner 21618fd57520SJan Höppner if (enable_pav) 21628fd57520SJan Höppner startdev = dasd_alias_get_start_dev(base); 21638fd57520SJan Höppner 21648fd57520SJan Höppner if (!startdev) 21658fd57520SJan Höppner startdev = base; 21668fd57520SJan Höppner 21678fd57520SJan Höppner start_priv = startdev->private; 21688fd57520SJan Höppner base_priv = base->private; 21698fd57520SJan Höppner 21708fd57520SJan Höppner count = rpt * (fdata->stop_unit - fdata->start_unit + 1); 21718fd57520SJan Höppner 21728fd57520SJan Höppner use_prefix = base_priv->features.feature[8] & 0x01; 21738fd57520SJan Höppner 21748fd57520SJan Höppner if (use_prefix) { 21758fd57520SJan Höppner cplength = 1; 21768fd57520SJan Höppner datasize = sizeof(struct PFX_eckd_data); 21778fd57520SJan Höppner } else { 21788fd57520SJan Höppner cplength = 2; 21798fd57520SJan Höppner datasize = sizeof(struct DE_eckd_data) + 21808fd57520SJan Höppner sizeof(struct LO_eckd_data); 21818fd57520SJan Höppner } 21828fd57520SJan Höppner cplength += count; 21838fd57520SJan Höppner 21848fd57520SJan Höppner cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 21858fd57520SJan Höppner startdev); 21868fd57520SJan Höppner if (IS_ERR(cqr)) 21878fd57520SJan Höppner return cqr; 21888fd57520SJan Höppner 21898fd57520SJan Höppner start_priv->count++; 21908fd57520SJan Höppner data = cqr->data; 21918fd57520SJan Höppner ccw = cqr->cpaddr; 21928fd57520SJan Höppner 21938fd57520SJan Höppner if (use_prefix) { 21948fd57520SJan Höppner prefix_LRE(ccw++, data, fdata->start_unit, fdata->stop_unit, 21958fd57520SJan Höppner DASD_ECKD_CCW_READ_COUNT, base, startdev, 1, 0, 21968fd57520SJan Höppner count, 0, 0); 21978fd57520SJan Höppner } else { 21988fd57520SJan Höppner define_extent(ccw++, data, fdata->start_unit, fdata->stop_unit, 219945f186beSJan Höppner DASD_ECKD_CCW_READ_COUNT, startdev, 0); 22008fd57520SJan Höppner 22018fd57520SJan Höppner data += sizeof(struct DE_eckd_data); 22028fd57520SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 22038fd57520SJan Höppner 22048fd57520SJan Höppner locate_record(ccw++, data, fdata->start_unit, 0, count, 22058fd57520SJan Höppner DASD_ECKD_CCW_READ_COUNT, base, 0); 22068fd57520SJan Höppner } 22078fd57520SJan Höppner 22088fd57520SJan Höppner for (i = 0; i < count; i++) { 22098fd57520SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 22108fd57520SJan Höppner ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 22118fd57520SJan Höppner ccw->flags = CCW_FLAG_SLI; 22128fd57520SJan Höppner ccw->count = 8; 22138fd57520SJan Höppner ccw->cda = (__u32)(addr_t) fmt_buffer; 22148fd57520SJan Höppner ccw++; 22158fd57520SJan Höppner fmt_buffer++; 22168fd57520SJan Höppner } 22178fd57520SJan Höppner 22188fd57520SJan Höppner cqr->startdev = startdev; 22198fd57520SJan Höppner cqr->memdev = startdev; 22208fd57520SJan Höppner cqr->basedev = base; 22218fd57520SJan Höppner cqr->retries = DASD_RETRIES; 22228fd57520SJan Höppner cqr->expires = startdev->default_expires * HZ; 22238fd57520SJan Höppner cqr->buildclk = get_tod_clock(); 22248fd57520SJan Höppner cqr->status = DASD_CQR_FILLED; 22258fd57520SJan Höppner /* Set flags to suppress output for expected errors */ 22268fd57520SJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 22278fd57520SJan Höppner 22288fd57520SJan Höppner return cqr; 22298fd57520SJan Höppner } 22308fd57520SJan Höppner 22311da177e4SLinus Torvalds static struct dasd_ccw_req * 2232d42e1712SStefan Haberland dasd_eckd_build_format(struct dasd_device *base, 223329b8dd9dSStefan Haberland struct format_data_t *fdata, 2234a94fa154SStefan Haberland int enable_pav) 22351da177e4SLinus Torvalds { 2236d42e1712SStefan Haberland struct dasd_eckd_private *base_priv; 2237d42e1712SStefan Haberland struct dasd_eckd_private *start_priv; 223829b8dd9dSStefan Haberland struct dasd_device *startdev = NULL; 22391da177e4SLinus Torvalds struct dasd_ccw_req *fcp; 22401da177e4SLinus Torvalds struct eckd_count *ect; 2241d42e1712SStefan Haberland struct ch_t address; 22421da177e4SLinus Torvalds struct ccw1 *ccw; 22431da177e4SLinus Torvalds void *data; 2244b44b0ab3SStefan Weinhuber int rpt; 22451da177e4SLinus Torvalds int cplength, datasize; 2246d42e1712SStefan Haberland int i, j; 2247f9a28f7bSJean-Baptiste Joret int intensity = 0; 2248f9a28f7bSJean-Baptiste Joret int r0_perm; 2249d42e1712SStefan Haberland int nr_tracks; 225018d6624eSStefan Haberland int use_prefix; 22511da177e4SLinus Torvalds 2252a94fa154SStefan Haberland if (enable_pav) 2253d42e1712SStefan Haberland startdev = dasd_alias_get_start_dev(base); 225429b8dd9dSStefan Haberland 2255d42e1712SStefan Haberland if (!startdev) 2256d42e1712SStefan Haberland startdev = base; 22571da177e4SLinus Torvalds 2258543691a4SSebastian Ott start_priv = startdev->private; 2259543691a4SSebastian Ott base_priv = base->private; 2260d42e1712SStefan Haberland 2261d42e1712SStefan Haberland rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize); 2262d42e1712SStefan Haberland 2263d42e1712SStefan Haberland nr_tracks = fdata->stop_unit - fdata->start_unit + 1; 22641da177e4SLinus Torvalds 22651da177e4SLinus Torvalds /* 22661da177e4SLinus Torvalds * fdata->intensity is a bit string that tells us what to do: 22671da177e4SLinus Torvalds * Bit 0: write record zero 22681da177e4SLinus Torvalds * Bit 1: write home address, currently not supported 22691da177e4SLinus Torvalds * Bit 2: invalidate tracks 22701da177e4SLinus Torvalds * Bit 3: use OS/390 compatible disk layout (cdl) 2271f9a28f7bSJean-Baptiste Joret * Bit 4: do not allow storage subsystem to modify record zero 22721da177e4SLinus Torvalds * Only some bit combinations do make sense. 22731da177e4SLinus Torvalds */ 2274f9a28f7bSJean-Baptiste Joret if (fdata->intensity & 0x10) { 2275f9a28f7bSJean-Baptiste Joret r0_perm = 0; 2276f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity & ~0x10; 2277f9a28f7bSJean-Baptiste Joret } else { 2278f9a28f7bSJean-Baptiste Joret r0_perm = 1; 2279f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity; 2280f9a28f7bSJean-Baptiste Joret } 2281d42e1712SStefan Haberland 228218d6624eSStefan Haberland use_prefix = base_priv->features.feature[8] & 0x01; 228318d6624eSStefan Haberland 2284f9a28f7bSJean-Baptiste Joret switch (intensity) { 22851da177e4SLinus Torvalds case 0x00: /* Normal format */ 22861da177e4SLinus Torvalds case 0x08: /* Normal format, use cdl. */ 2287d42e1712SStefan Haberland cplength = 2 + (rpt*nr_tracks); 228818d6624eSStefan Haberland if (use_prefix) 2289d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 22901da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 2291d42e1712SStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 229218d6624eSStefan Haberland else 229318d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 229418d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 229518d6624eSStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 22961da177e4SLinus Torvalds break; 22971da177e4SLinus Torvalds case 0x01: /* Write record zero and format track. */ 22981da177e4SLinus Torvalds case 0x09: /* Write record zero and format track, use cdl. */ 2299d42e1712SStefan Haberland cplength = 2 + rpt * nr_tracks; 230018d6624eSStefan Haberland if (use_prefix) 2301d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 23021da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 23031da177e4SLinus Torvalds sizeof(struct eckd_count) + 2304d42e1712SStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 230518d6624eSStefan Haberland else 230618d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 230718d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 230818d6624eSStefan Haberland sizeof(struct eckd_count) + 230918d6624eSStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 23101da177e4SLinus Torvalds break; 23111da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 23121da177e4SLinus Torvalds case 0x0c: /* Invalidate track, use cdl. */ 23131da177e4SLinus Torvalds cplength = 3; 231418d6624eSStefan Haberland if (use_prefix) 2315d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 23161da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 23171da177e4SLinus Torvalds sizeof(struct eckd_count); 231818d6624eSStefan Haberland else 231918d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 232018d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 232118d6624eSStefan Haberland sizeof(struct eckd_count); 23221da177e4SLinus Torvalds break; 23231da177e4SLinus Torvalds default: 2324d42e1712SStefan Haberland dev_warn(&startdev->cdev->dev, 2325d42e1712SStefan Haberland "An I/O control call used incorrect flags 0x%x\n", 2326d42e1712SStefan Haberland fdata->intensity); 23271da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 23281da177e4SLinus Torvalds } 23291da177e4SLinus Torvalds /* Allocate the format ccw request. */ 2330d42e1712SStefan Haberland fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 2331d42e1712SStefan Haberland datasize, startdev); 23321da177e4SLinus Torvalds if (IS_ERR(fcp)) 23331da177e4SLinus Torvalds return fcp; 23341da177e4SLinus Torvalds 2335d42e1712SStefan Haberland start_priv->count++; 23361da177e4SLinus Torvalds data = fcp->data; 23371da177e4SLinus Torvalds ccw = fcp->cpaddr; 23381da177e4SLinus Torvalds 2339f9a28f7bSJean-Baptiste Joret switch (intensity & ~0x08) { 23401da177e4SLinus Torvalds case 0x00: /* Normal format. */ 234118d6624eSStefan Haberland if (use_prefix) { 2342d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2343d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 2344d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2345f9a28f7bSJean-Baptiste Joret /* grant subsystem permission to format R0 */ 2346f9a28f7bSJean-Baptiste Joret if (r0_perm) 2347d42e1712SStefan Haberland ((struct PFX_eckd_data *)data) 2348d42e1712SStefan Haberland ->define_extent.ga_extended |= 0x04; 2349d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 235018d6624eSStefan Haberland } else { 235118d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 235218d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 235345f186beSJan Höppner DASD_ECKD_CCW_WRITE_CKD, startdev, 0); 235418d6624eSStefan Haberland /* grant subsystem permission to format R0 */ 235518d6624eSStefan Haberland if (r0_perm) 235618d6624eSStefan Haberland ((struct DE_eckd_data *) data) 235718d6624eSStefan Haberland ->ga_extended |= 0x04; 235818d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 235918d6624eSStefan Haberland } 23601da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 23611da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 2362d42e1712SStefan Haberland fdata->start_unit, 0, rpt*nr_tracks, 2363d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, 23641da177e4SLinus Torvalds fdata->blksize); 23651da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 23661da177e4SLinus Torvalds break; 23671da177e4SLinus Torvalds case 0x01: /* Write record zero + format track. */ 236818d6624eSStefan Haberland if (use_prefix) { 2369d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2370d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 23711da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, 2372d42e1712SStefan Haberland base, startdev); 2373d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 237418d6624eSStefan Haberland } else { 237518d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 237618d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 237745f186beSJan Höppner DASD_ECKD_CCW_WRITE_RECORD_ZERO, startdev, 0); 237818d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 237918d6624eSStefan Haberland } 23801da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 23811da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 2382d42e1712SStefan Haberland fdata->start_unit, 0, rpt * nr_tracks + 1, 2383d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_RECORD_ZERO, base, 2384d42e1712SStefan Haberland base->block->bp_block); 23851da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 23861da177e4SLinus Torvalds break; 23871da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 238818d6624eSStefan Haberland if (use_prefix) { 2389d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2390d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 2391d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2392d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 239318d6624eSStefan Haberland } else { 239418d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 239518d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 239645f186beSJan Höppner DASD_ECKD_CCW_WRITE_CKD, startdev, 0); 239718d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 239818d6624eSStefan Haberland } 23991da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 24001da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 24011da177e4SLinus Torvalds fdata->start_unit, 0, 1, 2402d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, 8); 24031da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 24041da177e4SLinus Torvalds break; 24051da177e4SLinus Torvalds } 2406d42e1712SStefan Haberland 2407d42e1712SStefan Haberland for (j = 0; j < nr_tracks; j++) { 2408d42e1712SStefan Haberland /* calculate cylinder and head for the current track */ 2409d42e1712SStefan Haberland set_ch_t(&address, 2410d42e1712SStefan Haberland (fdata->start_unit + j) / 2411d42e1712SStefan Haberland base_priv->rdc_data.trk_per_cyl, 2412d42e1712SStefan Haberland (fdata->start_unit + j) % 2413d42e1712SStefan Haberland base_priv->rdc_data.trk_per_cyl); 2414f9a28f7bSJean-Baptiste Joret if (intensity & 0x01) { /* write record zero */ 24151da177e4SLinus Torvalds ect = (struct eckd_count *) data; 24161da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2417b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2418b44b0ab3SStefan Weinhuber ect->head = address.head; 24191da177e4SLinus Torvalds ect->record = 0; 24201da177e4SLinus Torvalds ect->kl = 0; 24211da177e4SLinus Torvalds ect->dl = 8; 24221da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 24231da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 24241da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 24251da177e4SLinus Torvalds ccw->count = 8; 24261da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 24271da177e4SLinus Torvalds ccw++; 24281da177e4SLinus Torvalds } 2429f9a28f7bSJean-Baptiste Joret if ((intensity & ~0x08) & 0x04) { /* erase track */ 24301da177e4SLinus Torvalds ect = (struct eckd_count *) data; 24311da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2432b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2433b44b0ab3SStefan Weinhuber ect->head = address.head; 24341da177e4SLinus Torvalds ect->record = 1; 24351da177e4SLinus Torvalds ect->kl = 0; 24361da177e4SLinus Torvalds ect->dl = 0; 24371da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 24381da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 24391da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 24401da177e4SLinus Torvalds ccw->count = 8; 24411da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 24421da177e4SLinus Torvalds } else { /* write remaining records */ 24431da177e4SLinus Torvalds for (i = 0; i < rpt; i++) { 24441da177e4SLinus Torvalds ect = (struct eckd_count *) data; 24451da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2446b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2447b44b0ab3SStefan Weinhuber ect->head = address.head; 24481da177e4SLinus Torvalds ect->record = i + 1; 24491da177e4SLinus Torvalds ect->kl = 0; 24501da177e4SLinus Torvalds ect->dl = fdata->blksize; 2451d42e1712SStefan Haberland /* 2452d42e1712SStefan Haberland * Check for special tracks 0-1 2453d42e1712SStefan Haberland * when formatting CDL 2454d42e1712SStefan Haberland */ 2455f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 245646d1c03cSJan Höppner address.cyl == 0 && address.head == 0) { 24571da177e4SLinus Torvalds if (i < 3) { 24581da177e4SLinus Torvalds ect->kl = 4; 24591da177e4SLinus Torvalds ect->dl = sizes_trk0[i] - 4; 24601da177e4SLinus Torvalds } 24611da177e4SLinus Torvalds } 2462f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 246346d1c03cSJan Höppner address.cyl == 0 && address.head == 1) { 24641da177e4SLinus Torvalds ect->kl = 44; 24651da177e4SLinus Torvalds ect->dl = LABEL_SIZE - 44; 24661da177e4SLinus Torvalds } 24671da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 2468d42e1712SStefan Haberland if (i != 0 || j == 0) 2469d42e1712SStefan Haberland ccw->cmd_code = 2470d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD; 2471d42e1712SStefan Haberland else 2472d42e1712SStefan Haberland ccw->cmd_code = 2473d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD_MT; 24741da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 24751da177e4SLinus Torvalds ccw->count = 8; 24761da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 24771da177e4SLinus Torvalds ccw++; 24781da177e4SLinus Torvalds } 24791da177e4SLinus Torvalds } 2480d42e1712SStefan Haberland } 2481d42e1712SStefan Haberland 2482d42e1712SStefan Haberland fcp->startdev = startdev; 2483d42e1712SStefan Haberland fcp->memdev = startdev; 248429b8dd9dSStefan Haberland fcp->basedev = base; 2485eb6e199bSStefan Weinhuber fcp->retries = 256; 2486d42e1712SStefan Haberland fcp->expires = startdev->default_expires * HZ; 24871aae0560SHeiko Carstens fcp->buildclk = get_tod_clock(); 24881da177e4SLinus Torvalds fcp->status = DASD_CQR_FILLED; 2489d42e1712SStefan Haberland 24901da177e4SLinus Torvalds return fcp; 24911da177e4SLinus Torvalds } 24921da177e4SLinus Torvalds 2493570d237cSJan Höppner /* 2494570d237cSJan Höppner * Wrapper function to build a CCW request depending on input data 2495570d237cSJan Höppner */ 2496570d237cSJan Höppner static struct dasd_ccw_req * 2497570d237cSJan Höppner dasd_eckd_format_build_ccw_req(struct dasd_device *base, 24988fd57520SJan Höppner struct format_data_t *fdata, int enable_pav, 24998fd57520SJan Höppner int tpm, struct eckd_count *fmt_buffer, int rpt) 2500d42e1712SStefan Haberland { 25018fd57520SJan Höppner struct dasd_ccw_req *ccw_req; 25028fd57520SJan Höppner 25038fd57520SJan Höppner if (!fmt_buffer) { 25048fd57520SJan Höppner ccw_req = dasd_eckd_build_format(base, fdata, enable_pav); 25058fd57520SJan Höppner } else { 25068fd57520SJan Höppner if (tpm) 25078fd57520SJan Höppner ccw_req = dasd_eckd_build_check_tcw(base, fdata, 25088fd57520SJan Höppner enable_pav, 25098fd57520SJan Höppner fmt_buffer, rpt); 25108fd57520SJan Höppner else 25118fd57520SJan Höppner ccw_req = dasd_eckd_build_check(base, fdata, enable_pav, 25128fd57520SJan Höppner fmt_buffer, rpt); 25138fd57520SJan Höppner } 25148fd57520SJan Höppner 25158fd57520SJan Höppner return ccw_req; 2516570d237cSJan Höppner } 2517570d237cSJan Höppner 2518570d237cSJan Höppner /* 2519570d237cSJan Höppner * Sanity checks on format_data 2520570d237cSJan Höppner */ 2521570d237cSJan Höppner static int dasd_eckd_format_sanity_checks(struct dasd_device *base, 2522570d237cSJan Höppner struct format_data_t *fdata) 2523570d237cSJan Höppner { 2524543691a4SSebastian Ott struct dasd_eckd_private *private = base->private; 2525d42e1712SStefan Haberland 2526d42e1712SStefan Haberland if (fdata->start_unit >= 2527d42e1712SStefan Haberland (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2528d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2529d42e1712SStefan Haberland "Start track number %u used in formatting is too big\n", 2530d42e1712SStefan Haberland fdata->start_unit); 2531d42e1712SStefan Haberland return -EINVAL; 2532d42e1712SStefan Haberland } 2533d42e1712SStefan Haberland if (fdata->stop_unit >= 2534d42e1712SStefan Haberland (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2535d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2536d42e1712SStefan Haberland "Stop track number %u used in formatting is too big\n", 2537d42e1712SStefan Haberland fdata->stop_unit); 2538d42e1712SStefan Haberland return -EINVAL; 2539d42e1712SStefan Haberland } 2540d42e1712SStefan Haberland if (fdata->start_unit > fdata->stop_unit) { 2541d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2542d42e1712SStefan Haberland "Start track %u used in formatting exceeds end track\n", 2543d42e1712SStefan Haberland fdata->start_unit); 2544d42e1712SStefan Haberland return -EINVAL; 2545d42e1712SStefan Haberland } 2546d42e1712SStefan Haberland if (dasd_check_blocksize(fdata->blksize) != 0) { 2547d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2548d42e1712SStefan Haberland "The DASD cannot be formatted with block size %u\n", 2549d42e1712SStefan Haberland fdata->blksize); 2550d42e1712SStefan Haberland return -EINVAL; 2551d42e1712SStefan Haberland } 2552570d237cSJan Höppner return 0; 2553570d237cSJan Höppner } 2554570d237cSJan Höppner 2555570d237cSJan Höppner /* 2556570d237cSJan Höppner * This function will process format_data originally coming from an IOCTL 2557570d237cSJan Höppner */ 2558570d237cSJan Höppner static int dasd_eckd_format_process_data(struct dasd_device *base, 2559570d237cSJan Höppner struct format_data_t *fdata, 25608fd57520SJan Höppner int enable_pav, int tpm, 25618fd57520SJan Höppner struct eckd_count *fmt_buffer, int rpt, 25628fd57520SJan Höppner struct irb *irb) 2563570d237cSJan Höppner { 2564543691a4SSebastian Ott struct dasd_eckd_private *private = base->private; 2565570d237cSJan Höppner struct dasd_ccw_req *cqr, *n; 2566570d237cSJan Höppner struct list_head format_queue; 2567570d237cSJan Höppner struct dasd_device *device; 25688fd57520SJan Höppner char *sense = NULL; 2569570d237cSJan Höppner int old_start, old_stop, format_step; 2570570d237cSJan Höppner int step, retry; 2571570d237cSJan Höppner int rc; 2572570d237cSJan Höppner 2573570d237cSJan Höppner rc = dasd_eckd_format_sanity_checks(base, fdata); 2574570d237cSJan Höppner if (rc) 2575570d237cSJan Höppner return rc; 2576d42e1712SStefan Haberland 2577d42e1712SStefan Haberland INIT_LIST_HEAD(&format_queue); 2578d42e1712SStefan Haberland 257946d1c03cSJan Höppner old_start = fdata->start_unit; 258029b8dd9dSStefan Haberland old_stop = fdata->stop_unit; 2581d42e1712SStefan Haberland 25828fd57520SJan Höppner if (!tpm && fmt_buffer != NULL) { 25838fd57520SJan Höppner /* Command Mode / Format Check */ 25848fd57520SJan Höppner format_step = 1; 25858fd57520SJan Höppner } else if (tpm && fmt_buffer != NULL) { 25868fd57520SJan Höppner /* Transport Mode / Format Check */ 25878fd57520SJan Höppner format_step = DASD_CQR_MAX_CCW / rpt; 25888fd57520SJan Höppner } else { 25898fd57520SJan Höppner /* Normal Formatting */ 25908fd57520SJan Höppner format_step = DASD_CQR_MAX_CCW / 25918fd57520SJan Höppner recs_per_track(&private->rdc_data, 0, fdata->blksize); 25928fd57520SJan Höppner } 25938fd57520SJan Höppner 259446d1c03cSJan Höppner do { 259546d1c03cSJan Höppner retry = 0; 2596d42e1712SStefan Haberland while (fdata->start_unit <= old_stop) { 2597d42e1712SStefan Haberland step = fdata->stop_unit - fdata->start_unit + 1; 259846d1c03cSJan Höppner if (step > format_step) { 259946d1c03cSJan Höppner fdata->stop_unit = 260046d1c03cSJan Höppner fdata->start_unit + format_step - 1; 260146d1c03cSJan Höppner } 2602d42e1712SStefan Haberland 2603570d237cSJan Höppner cqr = dasd_eckd_format_build_ccw_req(base, fdata, 26048fd57520SJan Höppner enable_pav, tpm, 26058fd57520SJan Höppner fmt_buffer, rpt); 2606d42e1712SStefan Haberland if (IS_ERR(cqr)) { 260746d1c03cSJan Höppner rc = PTR_ERR(cqr); 260846d1c03cSJan Höppner if (rc == -ENOMEM) { 260946d1c03cSJan Höppner if (list_empty(&format_queue)) 261046d1c03cSJan Höppner goto out; 2611d42e1712SStefan Haberland /* 261246d1c03cSJan Höppner * not enough memory available, start 261346d1c03cSJan Höppner * requests retry after first requests 261446d1c03cSJan Höppner * were finished 2615d42e1712SStefan Haberland */ 261646d1c03cSJan Höppner retry = 1; 261746d1c03cSJan Höppner break; 2618d42e1712SStefan Haberland } 261946d1c03cSJan Höppner goto out_err; 262046d1c03cSJan Höppner } 262146d1c03cSJan Höppner list_add_tail(&cqr->blocklist, &format_queue); 2622d42e1712SStefan Haberland 26238fd57520SJan Höppner if (fmt_buffer) { 26248fd57520SJan Höppner step = fdata->stop_unit - fdata->start_unit + 1; 26258fd57520SJan Höppner fmt_buffer += rpt * step; 26268fd57520SJan Höppner } 2627d42e1712SStefan Haberland fdata->start_unit = fdata->stop_unit + 1; 2628d42e1712SStefan Haberland fdata->stop_unit = old_stop; 2629d42e1712SStefan Haberland } 2630d42e1712SStefan Haberland 263146d1c03cSJan Höppner rc = dasd_sleep_on_queue(&format_queue); 2632d42e1712SStefan Haberland 263346d1c03cSJan Höppner out_err: 2634d42e1712SStefan Haberland list_for_each_entry_safe(cqr, n, &format_queue, blocklist) { 2635d42e1712SStefan Haberland device = cqr->startdev; 2636543691a4SSebastian Ott private = device->private; 26378fd57520SJan Höppner 26388fd57520SJan Höppner if (cqr->status == DASD_CQR_FAILED) { 26398fd57520SJan Höppner /* 26408fd57520SJan Höppner * Only get sense data if called by format 26418fd57520SJan Höppner * check 26428fd57520SJan Höppner */ 26438fd57520SJan Höppner if (fmt_buffer && irb) { 26448fd57520SJan Höppner sense = dasd_get_sense(&cqr->irb); 26458fd57520SJan Höppner memcpy(irb, &cqr->irb, sizeof(*irb)); 26468fd57520SJan Höppner } 2647d42e1712SStefan Haberland rc = -EIO; 26488fd57520SJan Höppner } 2649d42e1712SStefan Haberland list_del_init(&cqr->blocklist); 2650d42e1712SStefan Haberland dasd_sfree_request(cqr, device); 2651d42e1712SStefan Haberland private->count--; 2652d42e1712SStefan Haberland } 2653d42e1712SStefan Haberland 26548fd57520SJan Höppner if (rc && rc != -EIO) 265546d1c03cSJan Höppner goto out; 26568fd57520SJan Höppner if (rc == -EIO) { 26578fd57520SJan Höppner /* 26588fd57520SJan Höppner * In case fewer than the expected records are on the 26598fd57520SJan Höppner * track, we will most likely get a 'No Record Found' 26608fd57520SJan Höppner * error (in command mode) or a 'File Protected' error 26618fd57520SJan Höppner * (in transport mode). Those particular cases shouldn't 26628fd57520SJan Höppner * pass the -EIO to the IOCTL, therefore reset the rc 26638fd57520SJan Höppner * and continue. 26648fd57520SJan Höppner */ 26658fd57520SJan Höppner if (sense && 26668fd57520SJan Höppner (sense[1] & SNS1_NO_REC_FOUND || 26678fd57520SJan Höppner sense[1] & SNS1_FILE_PROTECTED)) 26688fd57520SJan Höppner retry = 1; 26698fd57520SJan Höppner else 26708fd57520SJan Höppner goto out; 26718fd57520SJan Höppner } 267229b8dd9dSStefan Haberland 267346d1c03cSJan Höppner } while (retry); 267446d1c03cSJan Höppner 267546d1c03cSJan Höppner out: 267646d1c03cSJan Höppner fdata->start_unit = old_start; 267746d1c03cSJan Höppner fdata->stop_unit = old_stop; 2678d42e1712SStefan Haberland 2679d42e1712SStefan Haberland return rc; 2680d42e1712SStefan Haberland } 2681d42e1712SStefan Haberland 2682570d237cSJan Höppner static int dasd_eckd_format_device(struct dasd_device *base, 2683570d237cSJan Höppner struct format_data_t *fdata, int enable_pav) 2684570d237cSJan Höppner { 26858fd57520SJan Höppner return dasd_eckd_format_process_data(base, fdata, enable_pav, 0, NULL, 26868fd57520SJan Höppner 0, NULL); 26878fd57520SJan Höppner } 26888fd57520SJan Höppner 26898fd57520SJan Höppner /* 26908fd57520SJan Höppner * Helper function to count consecutive records of a single track. 26918fd57520SJan Höppner */ 26928fd57520SJan Höppner static int dasd_eckd_count_records(struct eckd_count *fmt_buffer, int start, 26938fd57520SJan Höppner int max) 26948fd57520SJan Höppner { 26958fd57520SJan Höppner int head; 26968fd57520SJan Höppner int i; 26978fd57520SJan Höppner 26988fd57520SJan Höppner head = fmt_buffer[start].head; 26998fd57520SJan Höppner 27008fd57520SJan Höppner /* 27018fd57520SJan Höppner * There are 3 conditions where we stop counting: 27028fd57520SJan Höppner * - if data reoccurs (same head and record may reoccur), which may 27038fd57520SJan Höppner * happen due to the way DASD_ECKD_CCW_READ_COUNT works 27048fd57520SJan Höppner * - when the head changes, because we're iterating over several tracks 27058fd57520SJan Höppner * then (DASD_ECKD_CCW_READ_COUNT_MT) 27068fd57520SJan Höppner * - when we've reached the end of sensible data in the buffer (the 27078fd57520SJan Höppner * record will be 0 then) 27088fd57520SJan Höppner */ 27098fd57520SJan Höppner for (i = start; i < max; i++) { 27108fd57520SJan Höppner if (i > start) { 27118fd57520SJan Höppner if ((fmt_buffer[i].head == head && 27128fd57520SJan Höppner fmt_buffer[i].record == 1) || 27138fd57520SJan Höppner fmt_buffer[i].head != head || 27148fd57520SJan Höppner fmt_buffer[i].record == 0) 27158fd57520SJan Höppner break; 27168fd57520SJan Höppner } 27178fd57520SJan Höppner } 27188fd57520SJan Höppner 27198fd57520SJan Höppner return i - start; 27208fd57520SJan Höppner } 27218fd57520SJan Höppner 27228fd57520SJan Höppner /* 27238fd57520SJan Höppner * Evaluate a given range of tracks. Data like number of records, blocksize, 27248fd57520SJan Höppner * record ids, and key length are compared with expected data. 27258fd57520SJan Höppner * 27268fd57520SJan Höppner * If a mismatch occurs, the corresponding error bit is set, as well as 27278fd57520SJan Höppner * additional information, depending on the error. 27288fd57520SJan Höppner */ 27298fd57520SJan Höppner static void dasd_eckd_format_evaluate_tracks(struct eckd_count *fmt_buffer, 27308fd57520SJan Höppner struct format_check_t *cdata, 27318fd57520SJan Höppner int rpt_max, int rpt_exp, 27328fd57520SJan Höppner int trk_per_cyl, int tpm) 27338fd57520SJan Höppner { 27348fd57520SJan Höppner struct ch_t geo; 27358fd57520SJan Höppner int max_entries; 27368fd57520SJan Höppner int count = 0; 27378fd57520SJan Höppner int trkcount; 27388fd57520SJan Höppner int blksize; 27398fd57520SJan Höppner int pos = 0; 27408fd57520SJan Höppner int i, j; 27418fd57520SJan Höppner int kl; 27428fd57520SJan Höppner 27438fd57520SJan Höppner trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; 27448fd57520SJan Höppner max_entries = trkcount * rpt_max; 27458fd57520SJan Höppner 27468fd57520SJan Höppner for (i = cdata->expect.start_unit; i <= cdata->expect.stop_unit; i++) { 27478fd57520SJan Höppner /* Calculate the correct next starting position in the buffer */ 27488fd57520SJan Höppner if (tpm) { 27498fd57520SJan Höppner while (fmt_buffer[pos].record == 0 && 27508fd57520SJan Höppner fmt_buffer[pos].dl == 0) { 27518fd57520SJan Höppner if (pos++ > max_entries) 27528fd57520SJan Höppner break; 27538fd57520SJan Höppner } 27548fd57520SJan Höppner } else { 27558fd57520SJan Höppner if (i != cdata->expect.start_unit) 27568fd57520SJan Höppner pos += rpt_max - count; 27578fd57520SJan Höppner } 27588fd57520SJan Höppner 27598fd57520SJan Höppner /* Calculate the expected geo values for the current track */ 27608fd57520SJan Höppner set_ch_t(&geo, i / trk_per_cyl, i % trk_per_cyl); 27618fd57520SJan Höppner 27628fd57520SJan Höppner /* Count and check number of records */ 27638fd57520SJan Höppner count = dasd_eckd_count_records(fmt_buffer, pos, pos + rpt_max); 27648fd57520SJan Höppner 27658fd57520SJan Höppner if (count < rpt_exp) { 27668fd57520SJan Höppner cdata->result = DASD_FMT_ERR_TOO_FEW_RECORDS; 27678fd57520SJan Höppner break; 27688fd57520SJan Höppner } 27698fd57520SJan Höppner if (count > rpt_exp) { 27708fd57520SJan Höppner cdata->result = DASD_FMT_ERR_TOO_MANY_RECORDS; 27718fd57520SJan Höppner break; 27728fd57520SJan Höppner } 27738fd57520SJan Höppner 27748fd57520SJan Höppner for (j = 0; j < count; j++, pos++) { 27758fd57520SJan Höppner blksize = cdata->expect.blksize; 27768fd57520SJan Höppner kl = 0; 27778fd57520SJan Höppner 27788fd57520SJan Höppner /* 27798fd57520SJan Höppner * Set special values when checking CDL formatted 27808fd57520SJan Höppner * devices. 27818fd57520SJan Höppner */ 27828fd57520SJan Höppner if ((cdata->expect.intensity & 0x08) && 27838fd57520SJan Höppner geo.cyl == 0 && geo.head == 0) { 27848fd57520SJan Höppner if (j < 3) { 27858fd57520SJan Höppner blksize = sizes_trk0[j] - 4; 27868fd57520SJan Höppner kl = 4; 27878fd57520SJan Höppner } 27888fd57520SJan Höppner } 27898fd57520SJan Höppner if ((cdata->expect.intensity & 0x08) && 27908fd57520SJan Höppner geo.cyl == 0 && geo.head == 1) { 27918fd57520SJan Höppner blksize = LABEL_SIZE - 44; 27928fd57520SJan Höppner kl = 44; 27938fd57520SJan Höppner } 27948fd57520SJan Höppner 27958fd57520SJan Höppner /* Check blocksize */ 27968fd57520SJan Höppner if (fmt_buffer[pos].dl != blksize) { 27978fd57520SJan Höppner cdata->result = DASD_FMT_ERR_BLKSIZE; 27988fd57520SJan Höppner goto out; 27998fd57520SJan Höppner } 28008fd57520SJan Höppner /* Check if key length is 0 */ 28018fd57520SJan Höppner if (fmt_buffer[pos].kl != kl) { 28028fd57520SJan Höppner cdata->result = DASD_FMT_ERR_KEY_LENGTH; 28038fd57520SJan Höppner goto out; 28048fd57520SJan Höppner } 28058fd57520SJan Höppner /* Check if record_id is correct */ 28068fd57520SJan Höppner if (fmt_buffer[pos].cyl != geo.cyl || 28078fd57520SJan Höppner fmt_buffer[pos].head != geo.head || 28088fd57520SJan Höppner fmt_buffer[pos].record != (j + 1)) { 28098fd57520SJan Höppner cdata->result = DASD_FMT_ERR_RECORD_ID; 28108fd57520SJan Höppner goto out; 28118fd57520SJan Höppner } 28128fd57520SJan Höppner } 28138fd57520SJan Höppner } 28148fd57520SJan Höppner 28158fd57520SJan Höppner out: 28168fd57520SJan Höppner /* 28178fd57520SJan Höppner * In case of no errors, we need to decrease by one 28188fd57520SJan Höppner * to get the correct positions. 28198fd57520SJan Höppner */ 28208fd57520SJan Höppner if (!cdata->result) { 28218fd57520SJan Höppner i--; 28228fd57520SJan Höppner pos--; 28238fd57520SJan Höppner } 28248fd57520SJan Höppner 28258fd57520SJan Höppner cdata->unit = i; 28268fd57520SJan Höppner cdata->num_records = count; 28278fd57520SJan Höppner cdata->rec = fmt_buffer[pos].record; 28288fd57520SJan Höppner cdata->blksize = fmt_buffer[pos].dl; 28298fd57520SJan Höppner cdata->key_length = fmt_buffer[pos].kl; 28308fd57520SJan Höppner } 28318fd57520SJan Höppner 28328fd57520SJan Höppner /* 28338fd57520SJan Höppner * Check the format of a range of tracks of a DASD. 28348fd57520SJan Höppner */ 28358fd57520SJan Höppner static int dasd_eckd_check_device_format(struct dasd_device *base, 28368fd57520SJan Höppner struct format_check_t *cdata, 28378fd57520SJan Höppner int enable_pav) 28388fd57520SJan Höppner { 28398fd57520SJan Höppner struct dasd_eckd_private *private = base->private; 28408fd57520SJan Höppner struct eckd_count *fmt_buffer; 28418fd57520SJan Höppner struct irb irb; 28428fd57520SJan Höppner int rpt_max, rpt_exp; 28438fd57520SJan Höppner int fmt_buffer_size; 28448fd57520SJan Höppner int trk_per_cyl; 28458fd57520SJan Höppner int trkcount; 28468fd57520SJan Höppner int tpm = 0; 28478fd57520SJan Höppner int rc; 28488fd57520SJan Höppner 28498fd57520SJan Höppner trk_per_cyl = private->rdc_data.trk_per_cyl; 28508fd57520SJan Höppner 28518fd57520SJan Höppner /* Get maximum and expected amount of records per track */ 28528fd57520SJan Höppner rpt_max = recs_per_track(&private->rdc_data, 0, 512) + 1; 28538fd57520SJan Höppner rpt_exp = recs_per_track(&private->rdc_data, 0, cdata->expect.blksize); 28548fd57520SJan Höppner 28558fd57520SJan Höppner trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; 28568fd57520SJan Höppner fmt_buffer_size = trkcount * rpt_max * sizeof(struct eckd_count); 28578fd57520SJan Höppner 28588fd57520SJan Höppner fmt_buffer = kzalloc(fmt_buffer_size, GFP_KERNEL | GFP_DMA); 28598fd57520SJan Höppner if (!fmt_buffer) 28608fd57520SJan Höppner return -ENOMEM; 28618fd57520SJan Höppner 28628fd57520SJan Höppner /* 28638fd57520SJan Höppner * A certain FICON feature subset is needed to operate in transport 28648fd57520SJan Höppner * mode. Additionally, the support for transport mode is implicitly 28658fd57520SJan Höppner * checked by comparing the buffer size with fcx_max_data. As long as 28668fd57520SJan Höppner * the buffer size is smaller we can operate in transport mode and 28678fd57520SJan Höppner * process multiple tracks. If not, only one track at once is being 28688fd57520SJan Höppner * processed using command mode. 28698fd57520SJan Höppner */ 28708fd57520SJan Höppner if ((private->features.feature[40] & 0x04) && 28718fd57520SJan Höppner fmt_buffer_size <= private->fcx_max_data) 28728fd57520SJan Höppner tpm = 1; 28738fd57520SJan Höppner 28748fd57520SJan Höppner rc = dasd_eckd_format_process_data(base, &cdata->expect, enable_pav, 28758fd57520SJan Höppner tpm, fmt_buffer, rpt_max, &irb); 28768fd57520SJan Höppner if (rc && rc != -EIO) 28778fd57520SJan Höppner goto out; 28788fd57520SJan Höppner if (rc == -EIO) { 28798fd57520SJan Höppner /* 28808fd57520SJan Höppner * If our first attempt with transport mode enabled comes back 28818fd57520SJan Höppner * with an incorrect length error, we're going to retry the 28828fd57520SJan Höppner * check with command mode. 28838fd57520SJan Höppner */ 28848fd57520SJan Höppner if (tpm && scsw_cstat(&irb.scsw) == 0x40) { 28858fd57520SJan Höppner tpm = 0; 28868fd57520SJan Höppner rc = dasd_eckd_format_process_data(base, &cdata->expect, 28878fd57520SJan Höppner enable_pav, tpm, 28888fd57520SJan Höppner fmt_buffer, rpt_max, 28898fd57520SJan Höppner &irb); 28908fd57520SJan Höppner if (rc) 28918fd57520SJan Höppner goto out; 28928fd57520SJan Höppner } else { 28938fd57520SJan Höppner goto out; 28948fd57520SJan Höppner } 28958fd57520SJan Höppner } 28968fd57520SJan Höppner 28978fd57520SJan Höppner dasd_eckd_format_evaluate_tracks(fmt_buffer, cdata, rpt_max, rpt_exp, 28988fd57520SJan Höppner trk_per_cyl, tpm); 28998fd57520SJan Höppner 29008fd57520SJan Höppner out: 29018fd57520SJan Höppner kfree(fmt_buffer); 29028fd57520SJan Höppner 29038fd57520SJan Höppner return rc; 2904570d237cSJan Höppner } 2905570d237cSJan Höppner 29068e09f215SStefan Weinhuber static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 29071da177e4SLinus Torvalds { 2908a2ace466SHannes Reinecke if (cqr->retries < 0) { 2909a2ace466SHannes Reinecke cqr->status = DASD_CQR_FAILED; 2910a2ace466SHannes Reinecke return; 2911a2ace466SHannes Reinecke } 29128e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 29138e09f215SStefan Weinhuber if (cqr->block && (cqr->startdev != cqr->block->base)) { 29148e09f215SStefan Weinhuber dasd_eckd_reset_ccw_to_base_io(cqr); 29158e09f215SStefan Weinhuber cqr->startdev = cqr->block->base; 2916c9346151SStefan Haberland cqr->lpm = dasd_path_get_opm(cqr->block->base); 29171da177e4SLinus Torvalds } 29188e09f215SStefan Weinhuber }; 29191da177e4SLinus Torvalds 29201da177e4SLinus Torvalds static dasd_erp_fn_t 29211da177e4SLinus Torvalds dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 29221da177e4SLinus Torvalds { 29238e09f215SStefan Weinhuber struct dasd_device *device = (struct dasd_device *) cqr->startdev; 29241da177e4SLinus Torvalds struct ccw_device *cdev = device->cdev; 29251da177e4SLinus Torvalds 29261da177e4SLinus Torvalds switch (cdev->id.cu_type) { 29271da177e4SLinus Torvalds case 0x3990: 29281da177e4SLinus Torvalds case 0x2105: 29291da177e4SLinus Torvalds case 0x2107: 29301da177e4SLinus Torvalds case 0x1750: 29311da177e4SLinus Torvalds return dasd_3990_erp_action; 29321da177e4SLinus Torvalds case 0x9343: 29331da177e4SLinus Torvalds case 0x3880: 29341da177e4SLinus Torvalds default: 29351da177e4SLinus Torvalds return dasd_default_erp_action; 29361da177e4SLinus Torvalds } 29371da177e4SLinus Torvalds } 29381da177e4SLinus Torvalds 29391da177e4SLinus Torvalds static dasd_erp_fn_t 29401da177e4SLinus Torvalds dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 29411da177e4SLinus Torvalds { 29421da177e4SLinus Torvalds return dasd_default_erp_postaction; 29431da177e4SLinus Torvalds } 29441da177e4SLinus Torvalds 29455a27e60dSStefan Weinhuber static void dasd_eckd_check_for_device_change(struct dasd_device *device, 29465a27e60dSStefan Weinhuber struct dasd_ccw_req *cqr, 29478e09f215SStefan Weinhuber struct irb *irb) 29488e09f215SStefan Weinhuber { 29498e09f215SStefan Weinhuber char mask; 2950f3eb5384SStefan Weinhuber char *sense = NULL; 2951543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 29528e09f215SStefan Weinhuber 29538e09f215SStefan Weinhuber /* first of all check for state change pending interrupt */ 29548e09f215SStefan Weinhuber mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 2955f3eb5384SStefan Weinhuber if ((scsw_dstat(&irb->scsw) & mask) == mask) { 2956c8d1c0ffSStefan Haberland /* 2957c8d1c0ffSStefan Haberland * for alias only, not in offline processing 2958c8d1c0ffSStefan Haberland * and only if not suspended 2959c8d1c0ffSStefan Haberland */ 2960501183f2SStefan Haberland if (!device->block && private->lcu && 296125e2cf1cSStefan Haberland device->state == DASD_STATE_ONLINE && 2962c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_OFFLINE, &device->flags) && 2963c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 2964501183f2SStefan Haberland /* schedule worker to reload device */ 2965501183f2SStefan Haberland dasd_reload_device(device); 2966501183f2SStefan Haberland } 29678e09f215SStefan Weinhuber dasd_generic_handle_state_change(device); 29688e09f215SStefan Weinhuber return; 29698e09f215SStefan Weinhuber } 29708e09f215SStefan Weinhuber 2971a5a0061fSStefan Weinhuber sense = dasd_get_sense(irb); 29725a27e60dSStefan Weinhuber if (!sense) 29735a27e60dSStefan Weinhuber return; 29745a27e60dSStefan Weinhuber 29755a27e60dSStefan Weinhuber /* summary unit check */ 2976c7a29e56SStefan Weinhuber if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) && 2977a5a0061fSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { 297859a9ed5fSStefan Haberland if (test_and_set_bit(DASD_FLAG_SUC, &device->flags)) { 297959a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 298059a9ed5fSStefan Haberland "eckd suc: device already notified"); 298159a9ed5fSStefan Haberland return; 298259a9ed5fSStefan Haberland } 298359a9ed5fSStefan Haberland sense = dasd_get_sense(irb); 298459a9ed5fSStefan Haberland if (!sense) { 298559a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 298659a9ed5fSStefan Haberland "eckd suc: no reason code available"); 298759a9ed5fSStefan Haberland clear_bit(DASD_FLAG_SUC, &device->flags); 298859a9ed5fSStefan Haberland return; 298959a9ed5fSStefan Haberland 299059a9ed5fSStefan Haberland } 299159a9ed5fSStefan Haberland private->suc_reason = sense[8]; 299259a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_NOTICE, device, "%s %x", 299359a9ed5fSStefan Haberland "eckd handle summary unit check: reason", 299459a9ed5fSStefan Haberland private->suc_reason); 299559a9ed5fSStefan Haberland dasd_get_device(device); 299659a9ed5fSStefan Haberland if (!schedule_work(&device->suc_work)) 299759a9ed5fSStefan Haberland dasd_put_device(device); 299859a9ed5fSStefan Haberland 29998e09f215SStefan Weinhuber return; 30008e09f215SStefan Weinhuber } 30018e09f215SStefan Weinhuber 3002f60c768cSStefan Haberland /* service information message SIM */ 30035a27e60dSStefan Weinhuber if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && 3004f3eb5384SStefan Weinhuber ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 3005f3eb5384SStefan Weinhuber dasd_3990_erp_handle_sim(device, sense); 3006f60c768cSStefan Haberland return; 3007f60c768cSStefan Haberland } 3008f60c768cSStefan Haberland 30095a27e60dSStefan Weinhuber /* loss of device reservation is handled via base devices only 30105a27e60dSStefan Weinhuber * as alias devices may be used with several bases 30115a27e60dSStefan Weinhuber */ 3012c7a29e56SStefan Weinhuber if (device->block && (sense[27] & DASD_SENSE_BIT_0) && 3013c7a29e56SStefan Weinhuber (sense[7] == 0x3F) && 30145a27e60dSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && 30155a27e60dSStefan Weinhuber test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { 30165a27e60dSStefan Weinhuber if (device->features & DASD_FEATURE_FAILONSLCK) 30175a27e60dSStefan Weinhuber set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); 30185a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 30195a27e60dSStefan Weinhuber dev_err(&device->cdev->dev, 30205a27e60dSStefan Weinhuber "The device reservation was lost\n"); 3021ada3df91SStefan Haberland } 30225a27e60dSStefan Weinhuber } 3023f3eb5384SStefan Weinhuber 3024f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( 3025f3eb5384SStefan Weinhuber struct dasd_device *startdev, 30268e09f215SStefan Weinhuber struct dasd_block *block, 3027f3eb5384SStefan Weinhuber struct request *req, 3028f3eb5384SStefan Weinhuber sector_t first_rec, 3029f3eb5384SStefan Weinhuber sector_t last_rec, 3030f3eb5384SStefan Weinhuber sector_t first_trk, 3031f3eb5384SStefan Weinhuber sector_t last_trk, 3032f3eb5384SStefan Weinhuber unsigned int first_offs, 3033f3eb5384SStefan Weinhuber unsigned int last_offs, 3034f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 3035f3eb5384SStefan Weinhuber unsigned int blksize) 30361da177e4SLinus Torvalds { 30371da177e4SLinus Torvalds struct dasd_eckd_private *private; 30381da177e4SLinus Torvalds unsigned long *idaws; 30391da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 30401da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 30411da177e4SLinus Torvalds struct ccw1 *ccw; 30425705f702SNeilBrown struct req_iterator iter; 30437988613bSKent Overstreet struct bio_vec bv; 30441da177e4SLinus Torvalds char *dst; 3045f3eb5384SStefan Weinhuber unsigned int off; 30461da177e4SLinus Torvalds int count, cidaw, cplength, datasize; 3047f3eb5384SStefan Weinhuber sector_t recid; 30481da177e4SLinus Torvalds unsigned char cmd, rcmd; 30498e09f215SStefan Weinhuber int use_prefix; 30508e09f215SStefan Weinhuber struct dasd_device *basedev; 30511da177e4SLinus Torvalds 30528e09f215SStefan Weinhuber basedev = block->base; 3053543691a4SSebastian Ott private = basedev->private; 30541da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 30551da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_READ_MT; 30561da177e4SLinus Torvalds else if (rq_data_dir(req) == WRITE) 30571da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_WRITE_MT; 30581da177e4SLinus Torvalds else 30591da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 3060f3eb5384SStefan Weinhuber 30611da177e4SLinus Torvalds /* Check struct bio and count the number of blocks for the request. */ 30621da177e4SLinus Torvalds count = 0; 30631da177e4SLinus Torvalds cidaw = 0; 30645705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 30657988613bSKent Overstreet if (bv.bv_len & (blksize - 1)) 30661da177e4SLinus Torvalds /* Eckd can only do full blocks. */ 30671da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 30687988613bSKent Overstreet count += bv.bv_len >> (block->s2b_shift + 9); 30697988613bSKent Overstreet if (idal_is_needed (page_address(bv.bv_page), bv.bv_len)) 30707988613bSKent Overstreet cidaw += bv.bv_len >> (block->s2b_shift + 9); 30711da177e4SLinus Torvalds } 30721da177e4SLinus Torvalds /* Paranoia. */ 30731da177e4SLinus Torvalds if (count != last_rec - first_rec + 1) 30741da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 30758e09f215SStefan Weinhuber 30768e09f215SStefan Weinhuber /* use the prefix command if available */ 30778e09f215SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 30788e09f215SStefan Weinhuber if (use_prefix) { 30798e09f215SStefan Weinhuber /* 1x prefix + number of blocks */ 30808e09f215SStefan Weinhuber cplength = 2 + count; 30818e09f215SStefan Weinhuber /* 1x prefix + cidaws*sizeof(long) */ 30828e09f215SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 30838e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 30848e09f215SStefan Weinhuber cidaw * sizeof(unsigned long); 30858e09f215SStefan Weinhuber } else { 30861da177e4SLinus Torvalds /* 1x define extent + 1x locate record + number of blocks */ 30871da177e4SLinus Torvalds cplength = 2 + count; 30881da177e4SLinus Torvalds /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 30898e09f215SStefan Weinhuber datasize = sizeof(struct DE_eckd_data) + 30908e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 30911da177e4SLinus Torvalds cidaw * sizeof(unsigned long); 30928e09f215SStefan Weinhuber } 30931da177e4SLinus Torvalds /* Find out the number of additional locate record ccws for cdl. */ 30941da177e4SLinus Torvalds if (private->uses_cdl && first_rec < 2*blk_per_trk) { 30951da177e4SLinus Torvalds if (last_rec >= 2*blk_per_trk) 30961da177e4SLinus Torvalds count = 2*blk_per_trk - first_rec; 30971da177e4SLinus Torvalds cplength += count; 30981da177e4SLinus Torvalds datasize += count*sizeof(struct LO_eckd_data); 30991da177e4SLinus Torvalds } 31001da177e4SLinus Torvalds /* Allocate the ccw request. */ 310168b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 310268b781feSStefan Haberland startdev); 31031da177e4SLinus Torvalds if (IS_ERR(cqr)) 31041da177e4SLinus Torvalds return cqr; 31051da177e4SLinus Torvalds ccw = cqr->cpaddr; 31068e09f215SStefan Weinhuber /* First ccw is define extent or prefix. */ 31078e09f215SStefan Weinhuber if (use_prefix) { 31088e09f215SStefan Weinhuber if (prefix(ccw++, cqr->data, first_trk, 31098e09f215SStefan Weinhuber last_trk, cmd, basedev, startdev) == -EAGAIN) { 31108e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 31118e09f215SStefan Weinhuber * Try again later. 31128e09f215SStefan Weinhuber */ 31138e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 3114d54853efSMartin Schwidefsky return ERR_PTR(-EAGAIN); 3115d54853efSMartin Schwidefsky } 31168e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 31178e09f215SStefan Weinhuber sizeof(struct PFX_eckd_data)); 31188e09f215SStefan Weinhuber } else { 31198e09f215SStefan Weinhuber if (define_extent(ccw++, cqr->data, first_trk, 312045f186beSJan Höppner last_trk, cmd, basedev, 0) == -EAGAIN) { 31218e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 31228e09f215SStefan Weinhuber * Try again later. 31238e09f215SStefan Weinhuber */ 31248e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 31258e09f215SStefan Weinhuber return ERR_PTR(-EAGAIN); 31268e09f215SStefan Weinhuber } 31278e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 31288e09f215SStefan Weinhuber sizeof(struct DE_eckd_data)); 31298e09f215SStefan Weinhuber } 31301da177e4SLinus Torvalds /* Build locate_record+read/write/ccws. */ 31311da177e4SLinus Torvalds LO_data = (struct LO_eckd_data *) (idaws + cidaw); 31321da177e4SLinus Torvalds recid = first_rec; 31331da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 31341da177e4SLinus Torvalds /* Only standard blocks so there is just one locate record. */ 31351da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 31361da177e4SLinus Torvalds locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 31378e09f215SStefan Weinhuber last_rec - recid + 1, cmd, basedev, blksize); 31381da177e4SLinus Torvalds } 31395705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 31407988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 31411da177e4SLinus Torvalds if (dasd_page_cache) { 31421da177e4SLinus Torvalds char *copy = kmem_cache_alloc(dasd_page_cache, 3143441e143eSChristoph Lameter GFP_DMA | __GFP_NOWARN); 31441da177e4SLinus Torvalds if (copy && rq_data_dir(req) == WRITE) 31457988613bSKent Overstreet memcpy(copy + bv.bv_offset, dst, bv.bv_len); 31461da177e4SLinus Torvalds if (copy) 31477988613bSKent Overstreet dst = copy + bv.bv_offset; 31481da177e4SLinus Torvalds } 31497988613bSKent Overstreet for (off = 0; off < bv.bv_len; off += blksize) { 31501da177e4SLinus Torvalds sector_t trkid = recid; 31511da177e4SLinus Torvalds unsigned int recoffs = sector_div(trkid, blk_per_trk); 31521da177e4SLinus Torvalds rcmd = cmd; 31531da177e4SLinus Torvalds count = blksize; 31541da177e4SLinus Torvalds /* Locate record for cdl special block ? */ 31551da177e4SLinus Torvalds if (private->uses_cdl && recid < 2*blk_per_trk) { 31561da177e4SLinus Torvalds if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 31571da177e4SLinus Torvalds rcmd |= 0x8; 31581da177e4SLinus Torvalds count = dasd_eckd_cdl_reclen(recid); 3159ec5883abSHorst Hummel if (count < blksize && 3160ec5883abSHorst Hummel rq_data_dir(req) == READ) 31611da177e4SLinus Torvalds memset(dst + count, 0xe5, 31621da177e4SLinus Torvalds blksize - count); 31631da177e4SLinus Torvalds } 31641da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 31651da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 31661da177e4SLinus Torvalds trkid, recoffs + 1, 31678e09f215SStefan Weinhuber 1, rcmd, basedev, count); 31681da177e4SLinus Torvalds } 31691da177e4SLinus Torvalds /* Locate record for standard blocks ? */ 31701da177e4SLinus Torvalds if (private->uses_cdl && recid == 2*blk_per_trk) { 31711da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 31721da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 31731da177e4SLinus Torvalds trkid, recoffs + 1, 31741da177e4SLinus Torvalds last_rec - recid + 1, 31758e09f215SStefan Weinhuber cmd, basedev, count); 31761da177e4SLinus Torvalds } 31771da177e4SLinus Torvalds /* Read/write ccw. */ 31781da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 31791da177e4SLinus Torvalds ccw->cmd_code = rcmd; 31801da177e4SLinus Torvalds ccw->count = count; 31811da177e4SLinus Torvalds if (idal_is_needed(dst, blksize)) { 31821da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) idaws; 31831da177e4SLinus Torvalds ccw->flags = CCW_FLAG_IDA; 31841da177e4SLinus Torvalds idaws = idal_create_words(idaws, dst, blksize); 31851da177e4SLinus Torvalds } else { 31861da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) dst; 31871da177e4SLinus Torvalds ccw->flags = 0; 31881da177e4SLinus Torvalds } 31891da177e4SLinus Torvalds ccw++; 31901da177e4SLinus Torvalds dst += blksize; 31911da177e4SLinus Torvalds recid++; 31921da177e4SLinus Torvalds } 31931da177e4SLinus Torvalds } 319413de227bSHolger Smolinski if (blk_noretry_request(req) || 319513de227bSHolger Smolinski block->base->features & DASD_FEATURE_FAILFAST) 31961c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 31978e09f215SStefan Weinhuber cqr->startdev = startdev; 31988e09f215SStefan Weinhuber cqr->memdev = startdev; 31998e09f215SStefan Weinhuber cqr->block = block; 32007c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 3201c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 32021f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 32031aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 32041da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 32051da177e4SLinus Torvalds return cqr; 32061da177e4SLinus Torvalds } 32071da177e4SLinus Torvalds 3208f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 3209f3eb5384SStefan Weinhuber struct dasd_device *startdev, 3210f3eb5384SStefan Weinhuber struct dasd_block *block, 3211f3eb5384SStefan Weinhuber struct request *req, 3212f3eb5384SStefan Weinhuber sector_t first_rec, 3213f3eb5384SStefan Weinhuber sector_t last_rec, 3214f3eb5384SStefan Weinhuber sector_t first_trk, 3215f3eb5384SStefan Weinhuber sector_t last_trk, 3216f3eb5384SStefan Weinhuber unsigned int first_offs, 3217f3eb5384SStefan Weinhuber unsigned int last_offs, 3218f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 3219f3eb5384SStefan Weinhuber unsigned int blksize) 3220f3eb5384SStefan Weinhuber { 3221f3eb5384SStefan Weinhuber unsigned long *idaws; 3222f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 3223f3eb5384SStefan Weinhuber struct ccw1 *ccw; 3224f3eb5384SStefan Weinhuber struct req_iterator iter; 32257988613bSKent Overstreet struct bio_vec bv; 3226f3eb5384SStefan Weinhuber char *dst, *idaw_dst; 3227f3eb5384SStefan Weinhuber unsigned int cidaw, cplength, datasize; 3228f3eb5384SStefan Weinhuber unsigned int tlf; 3229f3eb5384SStefan Weinhuber sector_t recid; 3230f3eb5384SStefan Weinhuber unsigned char cmd; 3231f3eb5384SStefan Weinhuber struct dasd_device *basedev; 3232f3eb5384SStefan Weinhuber unsigned int trkcount, count, count_to_trk_end; 3233f3eb5384SStefan Weinhuber unsigned int idaw_len, seg_len, part_len, len_to_track_end; 3234f3eb5384SStefan Weinhuber unsigned char new_track, end_idaw; 3235f3eb5384SStefan Weinhuber sector_t trkid; 3236f3eb5384SStefan Weinhuber unsigned int recoffs; 3237f3eb5384SStefan Weinhuber 3238f3eb5384SStefan Weinhuber basedev = block->base; 3239f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) 3240f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 3241f3eb5384SStefan Weinhuber else if (rq_data_dir(req) == WRITE) 3242f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 3243f3eb5384SStefan Weinhuber else 3244f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 3245f3eb5384SStefan Weinhuber 3246f3eb5384SStefan Weinhuber /* Track based I/O needs IDAWs for each page, and not just for 3247f3eb5384SStefan Weinhuber * 64 bit addresses. We need additional idals for pages 3248f3eb5384SStefan Weinhuber * that get filled from two tracks, so we use the number 3249f3eb5384SStefan Weinhuber * of records as upper limit. 3250f3eb5384SStefan Weinhuber */ 3251f3eb5384SStefan Weinhuber cidaw = last_rec - first_rec + 1; 3252f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 3253f3eb5384SStefan Weinhuber 3254f3eb5384SStefan Weinhuber /* 1x prefix + one read/write ccw per track */ 3255f3eb5384SStefan Weinhuber cplength = 1 + trkcount; 3256f3eb5384SStefan Weinhuber 3257f3eb5384SStefan Weinhuber /* on 31-bit we need space for two 32 bit addresses per page 3258f3eb5384SStefan Weinhuber * on 64-bit one 64 bit address 3259f3eb5384SStefan Weinhuber */ 3260f3eb5384SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 3261f3eb5384SStefan Weinhuber cidaw * sizeof(unsigned long long); 3262f3eb5384SStefan Weinhuber 3263f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 326468b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 326568b781feSStefan Haberland startdev); 3266f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 3267f3eb5384SStefan Weinhuber return cqr; 3268f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 3269f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 3270f3eb5384SStefan Weinhuber if (first_trk == last_trk) 3271f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 3272f3eb5384SStefan Weinhuber else 3273f3eb5384SStefan Weinhuber tlf = last_offs + 1; 3274f3eb5384SStefan Weinhuber tlf *= blksize; 3275f3eb5384SStefan Weinhuber 3276f3eb5384SStefan Weinhuber if (prefix_LRE(ccw++, cqr->data, first_trk, 3277f3eb5384SStefan Weinhuber last_trk, cmd, basedev, startdev, 3278f3eb5384SStefan Weinhuber 1 /* format */, first_offs + 1, 3279f3eb5384SStefan Weinhuber trkcount, blksize, 3280f3eb5384SStefan Weinhuber tlf) == -EAGAIN) { 3281f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 3282f3eb5384SStefan Weinhuber * Try again later. 3283f3eb5384SStefan Weinhuber */ 3284f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 3285f3eb5384SStefan Weinhuber return ERR_PTR(-EAGAIN); 3286f3eb5384SStefan Weinhuber } 3287f3eb5384SStefan Weinhuber 3288f3eb5384SStefan Weinhuber /* 3289f3eb5384SStefan Weinhuber * The translation of request into ccw programs must meet the 3290f3eb5384SStefan Weinhuber * following conditions: 3291f3eb5384SStefan Weinhuber * - all idaws but the first and the last must address full pages 3292f3eb5384SStefan Weinhuber * (or 2K blocks on 31-bit) 3293f3eb5384SStefan Weinhuber * - the scope of a ccw and it's idal ends with the track boundaries 3294f3eb5384SStefan Weinhuber */ 3295f3eb5384SStefan Weinhuber idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); 3296f3eb5384SStefan Weinhuber recid = first_rec; 3297f3eb5384SStefan Weinhuber new_track = 1; 3298f3eb5384SStefan Weinhuber end_idaw = 0; 3299f3eb5384SStefan Weinhuber len_to_track_end = 0; 3300246ccea1SMartin Schwidefsky idaw_dst = NULL; 3301f3eb5384SStefan Weinhuber idaw_len = 0; 3302f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 33037988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 33047988613bSKent Overstreet seg_len = bv.bv_len; 3305f3eb5384SStefan Weinhuber while (seg_len) { 3306f3eb5384SStefan Weinhuber if (new_track) { 3307f3eb5384SStefan Weinhuber trkid = recid; 3308f3eb5384SStefan Weinhuber recoffs = sector_div(trkid, blk_per_trk); 3309f3eb5384SStefan Weinhuber count_to_trk_end = blk_per_trk - recoffs; 3310f3eb5384SStefan Weinhuber count = min((last_rec - recid + 1), 3311f3eb5384SStefan Weinhuber (sector_t)count_to_trk_end); 3312f3eb5384SStefan Weinhuber len_to_track_end = count * blksize; 3313f3eb5384SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 3314f3eb5384SStefan Weinhuber ccw->cmd_code = cmd; 3315f3eb5384SStefan Weinhuber ccw->count = len_to_track_end; 3316f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 3317f3eb5384SStefan Weinhuber ccw->flags = CCW_FLAG_IDA; 3318f3eb5384SStefan Weinhuber ccw++; 3319f3eb5384SStefan Weinhuber recid += count; 3320f3eb5384SStefan Weinhuber new_track = 0; 332152db45c3SStefan Weinhuber /* first idaw for a ccw may start anywhere */ 332252db45c3SStefan Weinhuber if (!idaw_dst) 332352db45c3SStefan Weinhuber idaw_dst = dst; 3324f3eb5384SStefan Weinhuber } 332552db45c3SStefan Weinhuber /* If we start a new idaw, we must make sure that it 332652db45c3SStefan Weinhuber * starts on an IDA_BLOCK_SIZE boundary. 3327f3eb5384SStefan Weinhuber * If we continue an idaw, we must make sure that the 3328f3eb5384SStefan Weinhuber * current segment begins where the so far accumulated 3329f3eb5384SStefan Weinhuber * idaw ends 3330f3eb5384SStefan Weinhuber */ 333152db45c3SStefan Weinhuber if (!idaw_dst) { 333252db45c3SStefan Weinhuber if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { 333352db45c3SStefan Weinhuber dasd_sfree_request(cqr, startdev); 333452db45c3SStefan Weinhuber return ERR_PTR(-ERANGE); 333552db45c3SStefan Weinhuber } else 3336f3eb5384SStefan Weinhuber idaw_dst = dst; 333752db45c3SStefan Weinhuber } 3338f3eb5384SStefan Weinhuber if ((idaw_dst + idaw_len) != dst) { 3339f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 3340f3eb5384SStefan Weinhuber return ERR_PTR(-ERANGE); 3341f3eb5384SStefan Weinhuber } 3342f3eb5384SStefan Weinhuber part_len = min(seg_len, len_to_track_end); 3343f3eb5384SStefan Weinhuber seg_len -= part_len; 3344f3eb5384SStefan Weinhuber dst += part_len; 3345f3eb5384SStefan Weinhuber idaw_len += part_len; 3346f3eb5384SStefan Weinhuber len_to_track_end -= part_len; 3347f3eb5384SStefan Weinhuber /* collected memory area ends on an IDA_BLOCK border, 3348f3eb5384SStefan Weinhuber * -> create an idaw 3349f3eb5384SStefan Weinhuber * idal_create_words will handle cases where idaw_len 3350f3eb5384SStefan Weinhuber * is larger then IDA_BLOCK_SIZE 3351f3eb5384SStefan Weinhuber */ 3352f3eb5384SStefan Weinhuber if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) 3353f3eb5384SStefan Weinhuber end_idaw = 1; 3354f3eb5384SStefan Weinhuber /* We also need to end the idaw at track end */ 3355f3eb5384SStefan Weinhuber if (!len_to_track_end) { 3356f3eb5384SStefan Weinhuber new_track = 1; 3357f3eb5384SStefan Weinhuber end_idaw = 1; 3358f3eb5384SStefan Weinhuber } 3359f3eb5384SStefan Weinhuber if (end_idaw) { 3360f3eb5384SStefan Weinhuber idaws = idal_create_words(idaws, idaw_dst, 3361f3eb5384SStefan Weinhuber idaw_len); 3362246ccea1SMartin Schwidefsky idaw_dst = NULL; 3363f3eb5384SStefan Weinhuber idaw_len = 0; 3364f3eb5384SStefan Weinhuber end_idaw = 0; 3365f3eb5384SStefan Weinhuber } 3366f3eb5384SStefan Weinhuber } 3367f3eb5384SStefan Weinhuber } 3368f3eb5384SStefan Weinhuber 3369f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 3370f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 3371f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3372f3eb5384SStefan Weinhuber cqr->startdev = startdev; 3373f3eb5384SStefan Weinhuber cqr->memdev = startdev; 3374f3eb5384SStefan Weinhuber cqr->block = block; 33757c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 3376c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 33771f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 33781aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 3379f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 3380f3eb5384SStefan Weinhuber return cqr; 3381f3eb5384SStefan Weinhuber } 3382f3eb5384SStefan Weinhuber 3383f3eb5384SStefan Weinhuber static int prepare_itcw(struct itcw *itcw, 3384f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 3385f3eb5384SStefan Weinhuber struct dasd_device *basedev, 3386f3eb5384SStefan Weinhuber struct dasd_device *startdev, 3387f3eb5384SStefan Weinhuber unsigned int rec_on_trk, int count, 3388f3eb5384SStefan Weinhuber unsigned int blksize, 3389f3eb5384SStefan Weinhuber unsigned int total_data_size, 3390f3eb5384SStefan Weinhuber unsigned int tlf, 3391f3eb5384SStefan Weinhuber unsigned int blk_per_trk) 3392f3eb5384SStefan Weinhuber { 3393f3eb5384SStefan Weinhuber struct PFX_eckd_data pfxdata; 3394f3eb5384SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 3395f3eb5384SStefan Weinhuber struct DE_eckd_data *dedata; 3396f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 3397f3eb5384SStefan Weinhuber struct dcw *dcw; 3398f3eb5384SStefan Weinhuber 3399f3eb5384SStefan Weinhuber u32 begcyl, endcyl; 3400f3eb5384SStefan Weinhuber u16 heads, beghead, endhead; 3401f3eb5384SStefan Weinhuber u8 pfx_cmd; 3402f3eb5384SStefan Weinhuber 3403f3eb5384SStefan Weinhuber int rc = 0; 3404f3eb5384SStefan Weinhuber int sector = 0; 3405f3eb5384SStefan Weinhuber int dn, d; 3406f3eb5384SStefan Weinhuber 3407f3eb5384SStefan Weinhuber 3408f3eb5384SStefan Weinhuber /* setup prefix data */ 3409543691a4SSebastian Ott basepriv = basedev->private; 3410543691a4SSebastian Ott startpriv = startdev->private; 3411f3eb5384SStefan Weinhuber dedata = &pfxdata.define_extent; 3412f3eb5384SStefan Weinhuber lredata = &pfxdata.locate_record; 3413f3eb5384SStefan Weinhuber 3414f3eb5384SStefan Weinhuber memset(&pfxdata, 0, sizeof(pfxdata)); 3415f3eb5384SStefan Weinhuber pfxdata.format = 1; /* PFX with LRE */ 3416f3eb5384SStefan Weinhuber pfxdata.base_address = basepriv->ned->unit_addr; 3417f3eb5384SStefan Weinhuber pfxdata.base_lss = basepriv->ned->ID; 3418f3eb5384SStefan Weinhuber pfxdata.validity.define_extent = 1; 3419f3eb5384SStefan Weinhuber 3420f3eb5384SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 3421f3eb5384SStefan Weinhuber if (startpriv->uid.type != UA_BASE_DEVICE) { 3422f3eb5384SStefan Weinhuber pfxdata.validity.verify_base = 1; 3423f3eb5384SStefan Weinhuber if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 3424f3eb5384SStefan Weinhuber pfxdata.validity.hyper_pav = 1; 3425f3eb5384SStefan Weinhuber } 3426f3eb5384SStefan Weinhuber 3427f3eb5384SStefan Weinhuber switch (cmd) { 3428f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 3429f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 3430f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 3431f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 3432f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 3433f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 3434f3eb5384SStefan Weinhuber lredata->operation.operation = 0x0C; 3435f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x01; 3436f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX_READ; 3437f3eb5384SStefan Weinhuber break; 3438f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 3439f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 3440f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 3441f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 344245f186beSJan Höppner rc = check_XRC(NULL, dedata, basedev); 3443f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 3444f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 3445f3eb5384SStefan Weinhuber lredata->operation.operation = 0x3F; 3446f3eb5384SStefan Weinhuber lredata->extended_operation = 0x23; 3447f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x2; 344845f186beSJan Höppner /* 344945f186beSJan Höppner * If XRC is supported the System Time Stamp is set. The 345045f186beSJan Höppner * validity of the time stamp must be reflected in the prefix 345145f186beSJan Höppner * data as well. 345245f186beSJan Höppner */ 345345f186beSJan Höppner if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02) 345445f186beSJan Höppner pfxdata.validity.time_stamp = 1; /* 'Time Stamp Valid' */ 3455f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX; 3456f3eb5384SStefan Weinhuber break; 34578fd57520SJan Höppner case DASD_ECKD_CCW_READ_COUNT_MT: 34588fd57520SJan Höppner dedata->mask.perm = 0x1; 34598fd57520SJan Höppner dedata->attributes.operation = DASD_BYPASS_CACHE; 34608fd57520SJan Höppner dedata->ga_extended |= 0x42; 34618fd57520SJan Höppner dedata->blk_size = blksize; 34628fd57520SJan Höppner lredata->operation.orientation = 0x2; 34638fd57520SJan Höppner lredata->operation.operation = 0x16; 34648fd57520SJan Höppner lredata->auxiliary.check_bytes = 0x01; 34658fd57520SJan Höppner pfx_cmd = DASD_ECKD_CCW_PFX_READ; 34668fd57520SJan Höppner break; 3467f3eb5384SStefan Weinhuber default: 3468f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 3469f3eb5384SStefan Weinhuber "prepare itcw, unknown opcode 0x%x", cmd); 3470f3eb5384SStefan Weinhuber BUG(); 3471f3eb5384SStefan Weinhuber break; 3472f3eb5384SStefan Weinhuber } 3473f3eb5384SStefan Weinhuber if (rc) 3474f3eb5384SStefan Weinhuber return rc; 3475f3eb5384SStefan Weinhuber 3476f3eb5384SStefan Weinhuber dedata->attributes.mode = 0x3; /* ECKD */ 3477f3eb5384SStefan Weinhuber 3478f3eb5384SStefan Weinhuber heads = basepriv->rdc_data.trk_per_cyl; 3479f3eb5384SStefan Weinhuber begcyl = trk / heads; 3480f3eb5384SStefan Weinhuber beghead = trk % heads; 3481f3eb5384SStefan Weinhuber endcyl = totrk / heads; 3482f3eb5384SStefan Weinhuber endhead = totrk % heads; 3483f3eb5384SStefan Weinhuber 3484f3eb5384SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 3485f3eb5384SStefan Weinhuber if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 3486f3eb5384SStefan Weinhuber dedata->attributes.operation == DASD_SEQ_ACCESS) { 3487f3eb5384SStefan Weinhuber 3488f3eb5384SStefan Weinhuber if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 3489f3eb5384SStefan Weinhuber endcyl += basepriv->attrib.nr_cyl; 3490f3eb5384SStefan Weinhuber else 3491f3eb5384SStefan Weinhuber endcyl = (basepriv->real_cyl - 1); 3492f3eb5384SStefan Weinhuber } 3493f3eb5384SStefan Weinhuber 3494f3eb5384SStefan Weinhuber set_ch_t(&dedata->beg_ext, begcyl, beghead); 3495f3eb5384SStefan Weinhuber set_ch_t(&dedata->end_ext, endcyl, endhead); 3496f3eb5384SStefan Weinhuber 3497f3eb5384SStefan Weinhuber dedata->ep_format = 0x20; /* records per track is valid */ 3498f3eb5384SStefan Weinhuber dedata->ep_rec_per_track = blk_per_trk; 3499f3eb5384SStefan Weinhuber 3500f3eb5384SStefan Weinhuber if (rec_on_trk) { 3501f3eb5384SStefan Weinhuber switch (basepriv->rdc_data.dev_type) { 3502f3eb5384SStefan Weinhuber case 0x3390: 3503f3eb5384SStefan Weinhuber dn = ceil_quot(blksize + 6, 232); 3504f3eb5384SStefan Weinhuber d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); 3505f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 3506f3eb5384SStefan Weinhuber break; 3507f3eb5384SStefan Weinhuber case 0x3380: 3508f3eb5384SStefan Weinhuber d = 7 + ceil_quot(blksize + 12, 32); 3509f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 3510f3eb5384SStefan Weinhuber break; 3511f3eb5384SStefan Weinhuber } 3512f3eb5384SStefan Weinhuber } 3513f3eb5384SStefan Weinhuber 35148fd57520SJan Höppner if (cmd == DASD_ECKD_CCW_READ_COUNT_MT) { 35158fd57520SJan Höppner lredata->auxiliary.length_valid = 0; 35168fd57520SJan Höppner lredata->auxiliary.length_scope = 0; 35178fd57520SJan Höppner lredata->sector = 0xff; 35188fd57520SJan Höppner } else { 3519f3eb5384SStefan Weinhuber lredata->auxiliary.length_valid = 1; 3520f3eb5384SStefan Weinhuber lredata->auxiliary.length_scope = 1; 35218fd57520SJan Höppner lredata->sector = sector; 35228fd57520SJan Höppner } 3523f3eb5384SStefan Weinhuber lredata->auxiliary.imbedded_ccw_valid = 1; 3524f3eb5384SStefan Weinhuber lredata->length = tlf; 3525f3eb5384SStefan Weinhuber lredata->imbedded_ccw = cmd; 3526f3eb5384SStefan Weinhuber lredata->count = count; 3527f3eb5384SStefan Weinhuber set_ch_t(&lredata->seek_addr, begcyl, beghead); 3528f3eb5384SStefan Weinhuber lredata->search_arg.cyl = lredata->seek_addr.cyl; 3529f3eb5384SStefan Weinhuber lredata->search_arg.head = lredata->seek_addr.head; 3530f3eb5384SStefan Weinhuber lredata->search_arg.record = rec_on_trk; 3531f3eb5384SStefan Weinhuber 3532f3eb5384SStefan Weinhuber dcw = itcw_add_dcw(itcw, pfx_cmd, 0, 3533f3eb5384SStefan Weinhuber &pfxdata, sizeof(pfxdata), total_data_size); 353482a7b955SThomas Meyer return PTR_RET(dcw); 3535f3eb5384SStefan Weinhuber } 3536f3eb5384SStefan Weinhuber 3537f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 3538f3eb5384SStefan Weinhuber struct dasd_device *startdev, 3539f3eb5384SStefan Weinhuber struct dasd_block *block, 3540f3eb5384SStefan Weinhuber struct request *req, 3541f3eb5384SStefan Weinhuber sector_t first_rec, 3542f3eb5384SStefan Weinhuber sector_t last_rec, 3543f3eb5384SStefan Weinhuber sector_t first_trk, 3544f3eb5384SStefan Weinhuber sector_t last_trk, 3545f3eb5384SStefan Weinhuber unsigned int first_offs, 3546f3eb5384SStefan Weinhuber unsigned int last_offs, 3547f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 3548f3eb5384SStefan Weinhuber unsigned int blksize) 3549f3eb5384SStefan Weinhuber { 3550f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 3551f3eb5384SStefan Weinhuber struct req_iterator iter; 35527988613bSKent Overstreet struct bio_vec bv; 3553f3eb5384SStefan Weinhuber char *dst; 3554f3eb5384SStefan Weinhuber unsigned int trkcount, ctidaw; 3555f3eb5384SStefan Weinhuber unsigned char cmd; 3556f3eb5384SStefan Weinhuber struct dasd_device *basedev; 3557f3eb5384SStefan Weinhuber unsigned int tlf; 3558f3eb5384SStefan Weinhuber struct itcw *itcw; 3559f3eb5384SStefan Weinhuber struct tidaw *last_tidaw = NULL; 3560f3eb5384SStefan Weinhuber int itcw_op; 3561f3eb5384SStefan Weinhuber size_t itcw_size; 3562ef19298bSStefan Weinhuber u8 tidaw_flags; 3563ef19298bSStefan Weinhuber unsigned int seg_len, part_len, len_to_track_end; 3564ef19298bSStefan Weinhuber unsigned char new_track; 3565ef19298bSStefan Weinhuber sector_t recid, trkid; 3566ef19298bSStefan Weinhuber unsigned int offs; 3567ef19298bSStefan Weinhuber unsigned int count, count_to_trk_end; 3568cd10502bSJulia Lawall int ret; 3569f3eb5384SStefan Weinhuber 3570f3eb5384SStefan Weinhuber basedev = block->base; 3571f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) { 3572f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 3573f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_READ; 3574f3eb5384SStefan Weinhuber } else if (rq_data_dir(req) == WRITE) { 3575f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 3576f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_WRITE; 3577f3eb5384SStefan Weinhuber } else 3578f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 3579f3eb5384SStefan Weinhuber 3580f3eb5384SStefan Weinhuber /* trackbased I/O needs address all memory via TIDAWs, 3581f3eb5384SStefan Weinhuber * not just for 64 bit addresses. This allows us to map 3582f3eb5384SStefan Weinhuber * each segment directly to one tidaw. 3583ef19298bSStefan Weinhuber * In the case of write requests, additional tidaws may 3584ef19298bSStefan Weinhuber * be needed when a segment crosses a track boundary. 3585f3eb5384SStefan Weinhuber */ 3586f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 3587f3eb5384SStefan Weinhuber ctidaw = 0; 3588f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 3589f3eb5384SStefan Weinhuber ++ctidaw; 3590f3eb5384SStefan Weinhuber } 3591ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 3592ef19298bSStefan Weinhuber ctidaw += (last_trk - first_trk); 3593f3eb5384SStefan Weinhuber 3594f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 3595f3eb5384SStefan Weinhuber itcw_size = itcw_calc_size(0, ctidaw, 0); 359668b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 3597f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 3598f3eb5384SStefan Weinhuber return cqr; 3599f3eb5384SStefan Weinhuber 3600f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 3601f3eb5384SStefan Weinhuber if (first_trk == last_trk) 3602f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 3603f3eb5384SStefan Weinhuber else 3604f3eb5384SStefan Weinhuber tlf = last_offs + 1; 3605f3eb5384SStefan Weinhuber tlf *= blksize; 3606f3eb5384SStefan Weinhuber 3607f3eb5384SStefan Weinhuber itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); 3608ef19298bSStefan Weinhuber if (IS_ERR(itcw)) { 3609cd10502bSJulia Lawall ret = -EINVAL; 3610cd10502bSJulia Lawall goto out_error; 3611ef19298bSStefan Weinhuber } 3612f3eb5384SStefan Weinhuber cqr->cpaddr = itcw_get_tcw(itcw); 3613f3eb5384SStefan Weinhuber if (prepare_itcw(itcw, first_trk, last_trk, 3614f3eb5384SStefan Weinhuber cmd, basedev, startdev, 3615f3eb5384SStefan Weinhuber first_offs + 1, 3616f3eb5384SStefan Weinhuber trkcount, blksize, 3617f3eb5384SStefan Weinhuber (last_rec - first_rec + 1) * blksize, 3618f3eb5384SStefan Weinhuber tlf, blk_per_trk) == -EAGAIN) { 3619f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 3620f3eb5384SStefan Weinhuber * Try again later. 3621f3eb5384SStefan Weinhuber */ 3622cd10502bSJulia Lawall ret = -EAGAIN; 3623cd10502bSJulia Lawall goto out_error; 3624f3eb5384SStefan Weinhuber } 3625d54cddb6SHeiko Carstens len_to_track_end = 0; 3626f3eb5384SStefan Weinhuber /* 3627f3eb5384SStefan Weinhuber * A tidaw can address 4k of memory, but must not cross page boundaries 3628f3eb5384SStefan Weinhuber * We can let the block layer handle this by setting 3629f3eb5384SStefan Weinhuber * blk_queue_segment_boundary to page boundaries and 3630f3eb5384SStefan Weinhuber * blk_max_segment_size to page size when setting up the request queue. 3631ef19298bSStefan Weinhuber * For write requests, a TIDAW must not cross track boundaries, because 3632ef19298bSStefan Weinhuber * we have to set the CBC flag on the last tidaw for each track. 3633f3eb5384SStefan Weinhuber */ 3634ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) { 3635ef19298bSStefan Weinhuber new_track = 1; 3636ef19298bSStefan Weinhuber recid = first_rec; 3637f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 36387988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 36397988613bSKent Overstreet seg_len = bv.bv_len; 3640ef19298bSStefan Weinhuber while (seg_len) { 3641ef19298bSStefan Weinhuber if (new_track) { 3642ef19298bSStefan Weinhuber trkid = recid; 3643ef19298bSStefan Weinhuber offs = sector_div(trkid, blk_per_trk); 3644ef19298bSStefan Weinhuber count_to_trk_end = blk_per_trk - offs; 3645ef19298bSStefan Weinhuber count = min((last_rec - recid + 1), 3646ef19298bSStefan Weinhuber (sector_t)count_to_trk_end); 3647ef19298bSStefan Weinhuber len_to_track_end = count * blksize; 3648ef19298bSStefan Weinhuber recid += count; 3649ef19298bSStefan Weinhuber new_track = 0; 3650f3eb5384SStefan Weinhuber } 3651ef19298bSStefan Weinhuber part_len = min(seg_len, len_to_track_end); 3652ef19298bSStefan Weinhuber seg_len -= part_len; 3653ef19298bSStefan Weinhuber len_to_track_end -= part_len; 3654ef19298bSStefan Weinhuber /* We need to end the tidaw at track end */ 3655ef19298bSStefan Weinhuber if (!len_to_track_end) { 3656ef19298bSStefan Weinhuber new_track = 1; 3657ef19298bSStefan Weinhuber tidaw_flags = TIDAW_FLAGS_INSERT_CBC; 3658ef19298bSStefan Weinhuber } else 3659ef19298bSStefan Weinhuber tidaw_flags = 0; 3660ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, 3661ef19298bSStefan Weinhuber dst, part_len); 3662cd10502bSJulia Lawall if (IS_ERR(last_tidaw)) { 3663cd10502bSJulia Lawall ret = -EINVAL; 3664cd10502bSJulia Lawall goto out_error; 3665cd10502bSJulia Lawall } 3666ef19298bSStefan Weinhuber dst += part_len; 3667ef19298bSStefan Weinhuber } 3668ef19298bSStefan Weinhuber } 3669ef19298bSStefan Weinhuber } else { 3670ef19298bSStefan Weinhuber rq_for_each_segment(bv, req, iter) { 36717988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 3672ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, 0x00, 36737988613bSKent Overstreet dst, bv.bv_len); 3674cd10502bSJulia Lawall if (IS_ERR(last_tidaw)) { 3675cd10502bSJulia Lawall ret = -EINVAL; 3676cd10502bSJulia Lawall goto out_error; 3677cd10502bSJulia Lawall } 3678ef19298bSStefan Weinhuber } 3679ef19298bSStefan Weinhuber } 3680ef19298bSStefan Weinhuber last_tidaw->flags |= TIDAW_FLAGS_LAST; 3681ef19298bSStefan Weinhuber last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; 3682f3eb5384SStefan Weinhuber itcw_finalize(itcw); 3683f3eb5384SStefan Weinhuber 3684f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 3685f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 3686f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3687ef19298bSStefan Weinhuber cqr->cpmode = 1; 3688f3eb5384SStefan Weinhuber cqr->startdev = startdev; 3689f3eb5384SStefan Weinhuber cqr->memdev = startdev; 3690f3eb5384SStefan Weinhuber cqr->block = block; 36917c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 3692c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 36931f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 36941aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 3695f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 3696f3eb5384SStefan Weinhuber return cqr; 3697cd10502bSJulia Lawall out_error: 3698cd10502bSJulia Lawall dasd_sfree_request(cqr, startdev); 3699cd10502bSJulia Lawall return ERR_PTR(ret); 3700f3eb5384SStefan Weinhuber } 3701f3eb5384SStefan Weinhuber 3702f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 3703f3eb5384SStefan Weinhuber struct dasd_block *block, 3704f3eb5384SStefan Weinhuber struct request *req) 3705f3eb5384SStefan Weinhuber { 3706ef19298bSStefan Weinhuber int cmdrtd, cmdwtd; 3707f3eb5384SStefan Weinhuber int use_prefix; 3708ef19298bSStefan Weinhuber int fcx_multitrack; 370945b44d76SStefan Weinhuber struct dasd_eckd_private *private; 3710f3eb5384SStefan Weinhuber struct dasd_device *basedev; 3711f3eb5384SStefan Weinhuber sector_t first_rec, last_rec; 3712f3eb5384SStefan Weinhuber sector_t first_trk, last_trk; 3713f3eb5384SStefan Weinhuber unsigned int first_offs, last_offs; 3714f3eb5384SStefan Weinhuber unsigned int blk_per_trk, blksize; 3715f3eb5384SStefan Weinhuber int cdlspecial; 3716ef19298bSStefan Weinhuber unsigned int data_size; 3717f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 3718f3eb5384SStefan Weinhuber 3719f3eb5384SStefan Weinhuber basedev = block->base; 3720543691a4SSebastian Ott private = basedev->private; 3721f3eb5384SStefan Weinhuber 3722f3eb5384SStefan Weinhuber /* Calculate number of blocks/records per track. */ 3723f3eb5384SStefan Weinhuber blksize = block->bp_block; 3724f3eb5384SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 37256fca97a9SStefan Haberland if (blk_per_trk == 0) 37266fca97a9SStefan Haberland return ERR_PTR(-EINVAL); 3727f3eb5384SStefan Weinhuber /* Calculate record id of first and last block. */ 372883096ebfSTejun Heo first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; 3729f3eb5384SStefan Weinhuber first_offs = sector_div(first_trk, blk_per_trk); 3730f3eb5384SStefan Weinhuber last_rec = last_trk = 373183096ebfSTejun Heo (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 3732f3eb5384SStefan Weinhuber last_offs = sector_div(last_trk, blk_per_trk); 3733f3eb5384SStefan Weinhuber cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); 3734f3eb5384SStefan Weinhuber 3735ef19298bSStefan Weinhuber fcx_multitrack = private->features.feature[40] & 0x20; 3736ef19298bSStefan Weinhuber data_size = blk_rq_bytes(req); 373726a35f37SStefan Weinhuber if (data_size % blksize) 373826a35f37SStefan Weinhuber return ERR_PTR(-EINVAL); 3739ef19298bSStefan Weinhuber /* tpm write request add CBC data on each track boundary */ 3740ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 3741ef19298bSStefan Weinhuber data_size += (last_trk - first_trk) * 4; 3742f3eb5384SStefan Weinhuber 3743f3eb5384SStefan Weinhuber /* is read track data and write track data in command mode supported? */ 3744f3eb5384SStefan Weinhuber cmdrtd = private->features.feature[9] & 0x20; 3745f3eb5384SStefan Weinhuber cmdwtd = private->features.feature[12] & 0x40; 3746f3eb5384SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 3747f3eb5384SStefan Weinhuber 3748f3eb5384SStefan Weinhuber cqr = NULL; 3749f3eb5384SStefan Weinhuber if (cdlspecial || dasd_page_cache) { 3750f3eb5384SStefan Weinhuber /* do nothing, just fall through to the cmd mode single case */ 3751ef19298bSStefan Weinhuber } else if ((data_size <= private->fcx_max_data) 3752ef19298bSStefan Weinhuber && (fcx_multitrack || (first_trk == last_trk))) { 3753f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, 3754f3eb5384SStefan Weinhuber first_rec, last_rec, 3755f3eb5384SStefan Weinhuber first_trk, last_trk, 3756f3eb5384SStefan Weinhuber first_offs, last_offs, 3757f3eb5384SStefan Weinhuber blk_per_trk, blksize); 3758ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3759ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 3760f3eb5384SStefan Weinhuber cqr = NULL; 3761f3eb5384SStefan Weinhuber } else if (use_prefix && 3762f3eb5384SStefan Weinhuber (((rq_data_dir(req) == READ) && cmdrtd) || 3763f3eb5384SStefan Weinhuber ((rq_data_dir(req) == WRITE) && cmdwtd))) { 3764f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, 3765f3eb5384SStefan Weinhuber first_rec, last_rec, 3766f3eb5384SStefan Weinhuber first_trk, last_trk, 3767f3eb5384SStefan Weinhuber first_offs, last_offs, 3768f3eb5384SStefan Weinhuber blk_per_trk, blksize); 3769ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3770ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 3771f3eb5384SStefan Weinhuber cqr = NULL; 3772f3eb5384SStefan Weinhuber } 3773f3eb5384SStefan Weinhuber if (!cqr) 3774f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, 3775f3eb5384SStefan Weinhuber first_rec, last_rec, 3776f3eb5384SStefan Weinhuber first_trk, last_trk, 3777f3eb5384SStefan Weinhuber first_offs, last_offs, 3778f3eb5384SStefan Weinhuber blk_per_trk, blksize); 3779f3eb5384SStefan Weinhuber return cqr; 3780f3eb5384SStefan Weinhuber } 3781f3eb5384SStefan Weinhuber 3782bbc7f7eaSJan Höppner static struct dasd_ccw_req *dasd_eckd_build_cp_raw(struct dasd_device *startdev, 3783e4dbb0f2SStefan Haberland struct dasd_block *block, 3784e4dbb0f2SStefan Haberland struct request *req) 3785e4dbb0f2SStefan Haberland { 3786e4dbb0f2SStefan Haberland unsigned long *idaws; 3787e4dbb0f2SStefan Haberland struct dasd_device *basedev; 3788e4dbb0f2SStefan Haberland struct dasd_ccw_req *cqr; 3789e4dbb0f2SStefan Haberland struct ccw1 *ccw; 3790e4dbb0f2SStefan Haberland struct req_iterator iter; 37917988613bSKent Overstreet struct bio_vec bv; 3792e4dbb0f2SStefan Haberland char *dst; 3793e4dbb0f2SStefan Haberland unsigned char cmd; 3794e4dbb0f2SStefan Haberland unsigned int trkcount; 3795e4dbb0f2SStefan Haberland unsigned int seg_len, len_to_track_end; 3796e4dbb0f2SStefan Haberland unsigned int first_offs; 3797e4dbb0f2SStefan Haberland unsigned int cidaw, cplength, datasize; 3798558b9ef0SStefan Weinhuber sector_t first_trk, last_trk, sectors; 3799558b9ef0SStefan Weinhuber sector_t start_padding_sectors, end_sector_offset, end_padding_sectors; 3800e4dbb0f2SStefan Haberland unsigned int pfx_datasize; 3801e4dbb0f2SStefan Haberland 3802e4dbb0f2SStefan Haberland /* 3803e4dbb0f2SStefan Haberland * raw track access needs to be mutiple of 64k and on 64k boundary 3804558b9ef0SStefan Weinhuber * For read requests we can fix an incorrect alignment by padding 3805558b9ef0SStefan Weinhuber * the request with dummy pages. 3806e4dbb0f2SStefan Haberland */ 3807558b9ef0SStefan Weinhuber start_padding_sectors = blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK; 3808558b9ef0SStefan Weinhuber end_sector_offset = (blk_rq_pos(req) + blk_rq_sectors(req)) % 3809558b9ef0SStefan Weinhuber DASD_RAW_SECTORS_PER_TRACK; 3810558b9ef0SStefan Weinhuber end_padding_sectors = (DASD_RAW_SECTORS_PER_TRACK - end_sector_offset) % 3811558b9ef0SStefan Weinhuber DASD_RAW_SECTORS_PER_TRACK; 3812558b9ef0SStefan Weinhuber basedev = block->base; 3813558b9ef0SStefan Weinhuber if ((start_padding_sectors || end_padding_sectors) && 3814558b9ef0SStefan Weinhuber (rq_data_dir(req) == WRITE)) { 3815558b9ef0SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 3816558b9ef0SStefan Weinhuber "raw write not track aligned (%lu,%lu) req %p", 3817558b9ef0SStefan Weinhuber start_padding_sectors, end_padding_sectors, req); 3818e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EINVAL); 3819e4dbb0f2SStefan Haberland goto out; 3820e4dbb0f2SStefan Haberland } 3821e4dbb0f2SStefan Haberland 3822e4dbb0f2SStefan Haberland first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; 3823e4dbb0f2SStefan Haberland last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / 3824e4dbb0f2SStefan Haberland DASD_RAW_SECTORS_PER_TRACK; 3825e4dbb0f2SStefan Haberland trkcount = last_trk - first_trk + 1; 3826e4dbb0f2SStefan Haberland first_offs = 0; 3827e4dbb0f2SStefan Haberland 3828e4dbb0f2SStefan Haberland if (rq_data_dir(req) == READ) 3829e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_READ_TRACK; 3830e4dbb0f2SStefan Haberland else if (rq_data_dir(req) == WRITE) 3831e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; 3832e4dbb0f2SStefan Haberland else { 3833e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EINVAL); 3834e4dbb0f2SStefan Haberland goto out; 3835e4dbb0f2SStefan Haberland } 3836e4dbb0f2SStefan Haberland 3837e4dbb0f2SStefan Haberland /* 3838e4dbb0f2SStefan Haberland * Raw track based I/O needs IDAWs for each page, 3839e4dbb0f2SStefan Haberland * and not just for 64 bit addresses. 3840e4dbb0f2SStefan Haberland */ 3841e4dbb0f2SStefan Haberland cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; 3842e4dbb0f2SStefan Haberland 3843e4dbb0f2SStefan Haberland /* 1x prefix + one read/write ccw per track */ 3844e4dbb0f2SStefan Haberland cplength = 1 + trkcount; 3845e4dbb0f2SStefan Haberland 3846e4dbb0f2SStefan Haberland /* 3847e4dbb0f2SStefan Haberland * struct PFX_eckd_data has up to 2 byte as extended parameter 3848e4dbb0f2SStefan Haberland * this is needed for write full track and has to be mentioned 384925985edcSLucas De Marchi * separately 3850e4dbb0f2SStefan Haberland * add 8 instead of 2 to keep 8 byte boundary 3851e4dbb0f2SStefan Haberland */ 3852e4dbb0f2SStefan Haberland pfx_datasize = sizeof(struct PFX_eckd_data) + 8; 3853e4dbb0f2SStefan Haberland 3854e4dbb0f2SStefan Haberland datasize = pfx_datasize + cidaw * sizeof(unsigned long long); 3855e4dbb0f2SStefan Haberland 3856e4dbb0f2SStefan Haberland /* Allocate the ccw request. */ 3857e4dbb0f2SStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 3858e4dbb0f2SStefan Haberland datasize, startdev); 3859e4dbb0f2SStefan Haberland if (IS_ERR(cqr)) 3860e4dbb0f2SStefan Haberland goto out; 3861e4dbb0f2SStefan Haberland ccw = cqr->cpaddr; 3862e4dbb0f2SStefan Haberland 3863e4dbb0f2SStefan Haberland if (prefix_LRE(ccw++, cqr->data, first_trk, last_trk, cmd, 3864e4dbb0f2SStefan Haberland basedev, startdev, 1 /* format */, first_offs + 1, 3865e4dbb0f2SStefan Haberland trkcount, 0, 0) == -EAGAIN) { 3866e4dbb0f2SStefan Haberland /* Clock not in sync and XRC is enabled. 3867e4dbb0f2SStefan Haberland * Try again later. 3868e4dbb0f2SStefan Haberland */ 3869e4dbb0f2SStefan Haberland dasd_sfree_request(cqr, startdev); 3870e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EAGAIN); 3871e4dbb0f2SStefan Haberland goto out; 3872e4dbb0f2SStefan Haberland } 3873e4dbb0f2SStefan Haberland 3874e4dbb0f2SStefan Haberland idaws = (unsigned long *)(cqr->data + pfx_datasize); 3875e4dbb0f2SStefan Haberland len_to_track_end = 0; 3876558b9ef0SStefan Weinhuber if (start_padding_sectors) { 3877558b9ef0SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 3878558b9ef0SStefan Weinhuber ccw->cmd_code = cmd; 3879558b9ef0SStefan Weinhuber /* maximum 3390 track size */ 3880558b9ef0SStefan Weinhuber ccw->count = 57326; 3881558b9ef0SStefan Weinhuber /* 64k map to one track */ 3882558b9ef0SStefan Weinhuber len_to_track_end = 65536 - start_padding_sectors * 512; 3883558b9ef0SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 3884558b9ef0SStefan Weinhuber ccw->flags |= CCW_FLAG_IDA; 3885558b9ef0SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3886558b9ef0SStefan Weinhuber ccw++; 3887558b9ef0SStefan Weinhuber for (sectors = 0; sectors < start_padding_sectors; sectors += 8) 3888558b9ef0SStefan Weinhuber idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 3889558b9ef0SStefan Weinhuber } 3890e4dbb0f2SStefan Haberland rq_for_each_segment(bv, req, iter) { 38917988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 38927988613bSKent Overstreet seg_len = bv.bv_len; 3893558b9ef0SStefan Weinhuber if (cmd == DASD_ECKD_CCW_READ_TRACK) 3894558b9ef0SStefan Weinhuber memset(dst, 0, seg_len); 3895e4dbb0f2SStefan Haberland if (!len_to_track_end) { 3896e4dbb0f2SStefan Haberland ccw[-1].flags |= CCW_FLAG_CC; 3897e4dbb0f2SStefan Haberland ccw->cmd_code = cmd; 3898e4dbb0f2SStefan Haberland /* maximum 3390 track size */ 3899e4dbb0f2SStefan Haberland ccw->count = 57326; 3900e4dbb0f2SStefan Haberland /* 64k map to one track */ 3901e4dbb0f2SStefan Haberland len_to_track_end = 65536; 3902e4dbb0f2SStefan Haberland ccw->cda = (__u32)(addr_t)idaws; 3903e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_IDA; 3904e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 3905e4dbb0f2SStefan Haberland ccw++; 3906e4dbb0f2SStefan Haberland } 3907e4dbb0f2SStefan Haberland len_to_track_end -= seg_len; 3908e4dbb0f2SStefan Haberland idaws = idal_create_words(idaws, dst, seg_len); 3909e4dbb0f2SStefan Haberland } 3910558b9ef0SStefan Weinhuber for (sectors = 0; sectors < end_padding_sectors; sectors += 8) 3911558b9ef0SStefan Weinhuber idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 3912e4dbb0f2SStefan Haberland if (blk_noretry_request(req) || 3913e4dbb0f2SStefan Haberland block->base->features & DASD_FEATURE_FAILFAST) 3914e4dbb0f2SStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3915e4dbb0f2SStefan Haberland cqr->startdev = startdev; 3916e4dbb0f2SStefan Haberland cqr->memdev = startdev; 3917e4dbb0f2SStefan Haberland cqr->block = block; 3918e4dbb0f2SStefan Haberland cqr->expires = startdev->default_expires * HZ; 3919c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 39201f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 39211aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 3922e4dbb0f2SStefan Haberland cqr->status = DASD_CQR_FILLED; 3923e4dbb0f2SStefan Haberland 3924e4dbb0f2SStefan Haberland if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN) 3925e4dbb0f2SStefan Haberland cqr = NULL; 3926e4dbb0f2SStefan Haberland out: 3927e4dbb0f2SStefan Haberland return cqr; 3928e4dbb0f2SStefan Haberland } 3929e4dbb0f2SStefan Haberland 3930e4dbb0f2SStefan Haberland 39311da177e4SLinus Torvalds static int 39321da177e4SLinus Torvalds dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 39331da177e4SLinus Torvalds { 39341da177e4SLinus Torvalds struct dasd_eckd_private *private; 39351da177e4SLinus Torvalds struct ccw1 *ccw; 39365705f702SNeilBrown struct req_iterator iter; 39377988613bSKent Overstreet struct bio_vec bv; 39381da177e4SLinus Torvalds char *dst, *cda; 39391da177e4SLinus Torvalds unsigned int blksize, blk_per_trk, off; 39401da177e4SLinus Torvalds sector_t recid; 39415705f702SNeilBrown int status; 39421da177e4SLinus Torvalds 39431da177e4SLinus Torvalds if (!dasd_page_cache) 39441da177e4SLinus Torvalds goto out; 3945543691a4SSebastian Ott private = cqr->block->base->private; 39468e09f215SStefan Weinhuber blksize = cqr->block->bp_block; 39471da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 394883096ebfSTejun Heo recid = blk_rq_pos(req) >> cqr->block->s2b_shift; 39491da177e4SLinus Torvalds ccw = cqr->cpaddr; 39501da177e4SLinus Torvalds /* Skip over define extent & locate record. */ 39511da177e4SLinus Torvalds ccw++; 39521da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 39531da177e4SLinus Torvalds ccw++; 39545705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 39557988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 39567988613bSKent Overstreet for (off = 0; off < bv.bv_len; off += blksize) { 39571da177e4SLinus Torvalds /* Skip locate record. */ 39581da177e4SLinus Torvalds if (private->uses_cdl && recid <= 2*blk_per_trk) 39591da177e4SLinus Torvalds ccw++; 39601da177e4SLinus Torvalds if (dst) { 39611da177e4SLinus Torvalds if (ccw->flags & CCW_FLAG_IDA) 39621da177e4SLinus Torvalds cda = *((char **)((addr_t) ccw->cda)); 39631da177e4SLinus Torvalds else 39641da177e4SLinus Torvalds cda = (char *)((addr_t) ccw->cda); 39651da177e4SLinus Torvalds if (dst != cda) { 39661da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 39677988613bSKent Overstreet memcpy(dst, cda, bv.bv_len); 39681da177e4SLinus Torvalds kmem_cache_free(dasd_page_cache, 39691da177e4SLinus Torvalds (void *)((addr_t)cda & PAGE_MASK)); 39701da177e4SLinus Torvalds } 39711da177e4SLinus Torvalds dst = NULL; 39721da177e4SLinus Torvalds } 39731da177e4SLinus Torvalds ccw++; 39741da177e4SLinus Torvalds recid++; 39751da177e4SLinus Torvalds } 39761da177e4SLinus Torvalds } 39771da177e4SLinus Torvalds out: 39781da177e4SLinus Torvalds status = cqr->status == DASD_CQR_DONE; 39798e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 39801da177e4SLinus Torvalds return status; 39811da177e4SLinus Torvalds } 39821da177e4SLinus Torvalds 39838e09f215SStefan Weinhuber /* 3984f3eb5384SStefan Weinhuber * Modify ccw/tcw in cqr so it can be started on a base device. 39858e09f215SStefan Weinhuber * 39868e09f215SStefan Weinhuber * Note that this is not enough to restart the cqr! 39878e09f215SStefan Weinhuber * Either reset cqr->startdev as well (summary unit check handling) 39888e09f215SStefan Weinhuber * or restart via separate cqr (as in ERP handling). 39898e09f215SStefan Weinhuber */ 39908e09f215SStefan Weinhuber void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 39918e09f215SStefan Weinhuber { 39928e09f215SStefan Weinhuber struct ccw1 *ccw; 39938e09f215SStefan Weinhuber struct PFX_eckd_data *pfxdata; 3994f3eb5384SStefan Weinhuber struct tcw *tcw; 3995f3eb5384SStefan Weinhuber struct tccb *tccb; 3996f3eb5384SStefan Weinhuber struct dcw *dcw; 39978e09f215SStefan Weinhuber 3998f3eb5384SStefan Weinhuber if (cqr->cpmode == 1) { 3999f3eb5384SStefan Weinhuber tcw = cqr->cpaddr; 4000f3eb5384SStefan Weinhuber tccb = tcw_get_tccb(tcw); 4001f3eb5384SStefan Weinhuber dcw = (struct dcw *)&tccb->tca[0]; 4002f3eb5384SStefan Weinhuber pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; 4003f3eb5384SStefan Weinhuber pfxdata->validity.verify_base = 0; 4004f3eb5384SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 4005f3eb5384SStefan Weinhuber } else { 40068e09f215SStefan Weinhuber ccw = cqr->cpaddr; 40078e09f215SStefan Weinhuber pfxdata = cqr->data; 40088e09f215SStefan Weinhuber if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 40098e09f215SStefan Weinhuber pfxdata->validity.verify_base = 0; 40108e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 40118e09f215SStefan Weinhuber } 40128e09f215SStefan Weinhuber } 4013f3eb5384SStefan Weinhuber } 40148e09f215SStefan Weinhuber 40158e09f215SStefan Weinhuber #define DASD_ECKD_CHANQ_MAX_SIZE 4 40168e09f215SStefan Weinhuber 40178e09f215SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 40188e09f215SStefan Weinhuber struct dasd_block *block, 40198e09f215SStefan Weinhuber struct request *req) 40208e09f215SStefan Weinhuber { 40218e09f215SStefan Weinhuber struct dasd_eckd_private *private; 40228e09f215SStefan Weinhuber struct dasd_device *startdev; 40238e09f215SStefan Weinhuber unsigned long flags; 40248e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 40258e09f215SStefan Weinhuber 40268e09f215SStefan Weinhuber startdev = dasd_alias_get_start_dev(base); 40278e09f215SStefan Weinhuber if (!startdev) 40288e09f215SStefan Weinhuber startdev = base; 4029543691a4SSebastian Ott private = startdev->private; 40308e09f215SStefan Weinhuber if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 40318e09f215SStefan Weinhuber return ERR_PTR(-EBUSY); 40328e09f215SStefan Weinhuber 40338e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 40348e09f215SStefan Weinhuber private->count++; 4035e4dbb0f2SStefan Haberland if ((base->features & DASD_FEATURE_USERAW)) 4036bbc7f7eaSJan Höppner cqr = dasd_eckd_build_cp_raw(startdev, block, req); 4037e4dbb0f2SStefan Haberland else 40388e09f215SStefan Weinhuber cqr = dasd_eckd_build_cp(startdev, block, req); 40398e09f215SStefan Weinhuber if (IS_ERR(cqr)) 40408e09f215SStefan Weinhuber private->count--; 40418e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 40428e09f215SStefan Weinhuber return cqr; 40438e09f215SStefan Weinhuber } 40448e09f215SStefan Weinhuber 40458e09f215SStefan Weinhuber static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 40468e09f215SStefan Weinhuber struct request *req) 40478e09f215SStefan Weinhuber { 40488e09f215SStefan Weinhuber struct dasd_eckd_private *private; 40498e09f215SStefan Weinhuber unsigned long flags; 40508e09f215SStefan Weinhuber 40518e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 4052543691a4SSebastian Ott private = cqr->memdev->private; 40538e09f215SStefan Weinhuber private->count--; 40548e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 40558e09f215SStefan Weinhuber return dasd_eckd_free_cp(cqr, req); 40568e09f215SStefan Weinhuber } 40578e09f215SStefan Weinhuber 40581da177e4SLinus Torvalds static int 40591da177e4SLinus Torvalds dasd_eckd_fill_info(struct dasd_device * device, 40601da177e4SLinus Torvalds struct dasd_information2_t * info) 40611da177e4SLinus Torvalds { 4062543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 40631da177e4SLinus Torvalds 40641da177e4SLinus Torvalds info->label_block = 2; 40651da177e4SLinus Torvalds info->FBA_layout = private->uses_cdl ? 0 : 1; 40661da177e4SLinus Torvalds info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 4067543691a4SSebastian Ott info->characteristics_size = sizeof(private->rdc_data); 40681da177e4SLinus Torvalds memcpy(info->characteristics, &private->rdc_data, 4069543691a4SSebastian Ott sizeof(private->rdc_data)); 40704abb08c2SStefan Weinhuber info->confdata_size = min((unsigned long)private->conf_len, 40714abb08c2SStefan Weinhuber sizeof(info->configuration_data)); 40724abb08c2SStefan Weinhuber memcpy(info->configuration_data, private->conf_data, 40734abb08c2SStefan Weinhuber info->confdata_size); 40741da177e4SLinus Torvalds return 0; 40751da177e4SLinus Torvalds } 40761da177e4SLinus Torvalds 40771da177e4SLinus Torvalds /* 40781da177e4SLinus Torvalds * SECTION: ioctl functions for eckd devices. 40791da177e4SLinus Torvalds */ 40801da177e4SLinus Torvalds 40811da177e4SLinus Torvalds /* 40821da177e4SLinus Torvalds * Release device ioctl. 40831da177e4SLinus Torvalds * Buils a channel programm to releases a prior reserved 40841da177e4SLinus Torvalds * (see dasd_eckd_reserve) device. 40851da177e4SLinus Torvalds */ 40861da177e4SLinus Torvalds static int 40871107ccfbSChristoph Hellwig dasd_eckd_release(struct dasd_device *device) 40881da177e4SLinus Torvalds { 40891da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 40901da177e4SLinus Torvalds int rc; 4091f3eb5384SStefan Weinhuber struct ccw1 *ccw; 4092f932bceaSStefan Weinhuber int useglobal; 40931da177e4SLinus Torvalds 40941da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 40951da177e4SLinus Torvalds return -EACCES; 40961da177e4SLinus Torvalds 4097f932bceaSStefan Weinhuber useglobal = 0; 409868b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 40991da177e4SLinus Torvalds if (IS_ERR(cqr)) { 4100f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 4101f932bceaSStefan Weinhuber useglobal = 1; 4102f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 4103f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 4104f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 4105f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 4106f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 4107f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 4108f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 41091da177e4SLinus Torvalds } 4110f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 4111f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RELEASE; 4112f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4113f3eb5384SStefan Weinhuber ccw->count = 32; 4114f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 41158e09f215SStefan Weinhuber cqr->startdev = device; 41168e09f215SStefan Weinhuber cqr->memdev = device; 41171da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 41181c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4119336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 41201da177e4SLinus Torvalds cqr->expires = 2 * HZ; 41211aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 41221da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 41231da177e4SLinus Torvalds 41241da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 41255a27e60dSStefan Weinhuber if (!rc) 41265a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 41271da177e4SLinus Torvalds 4128f932bceaSStefan Weinhuber if (useglobal) 4129f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 4130f932bceaSStefan Weinhuber else 41318e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 41321da177e4SLinus Torvalds return rc; 41331da177e4SLinus Torvalds } 41341da177e4SLinus Torvalds 41351da177e4SLinus Torvalds /* 41361da177e4SLinus Torvalds * Reserve device ioctl. 41371da177e4SLinus Torvalds * Options are set to 'synchronous wait for interrupt' and 41381da177e4SLinus Torvalds * 'timeout the request'. This leads to a terminate IO if 41391da177e4SLinus Torvalds * the interrupt is outstanding for a certain time. 41401da177e4SLinus Torvalds */ 41411da177e4SLinus Torvalds static int 41421107ccfbSChristoph Hellwig dasd_eckd_reserve(struct dasd_device *device) 41431da177e4SLinus Torvalds { 41441da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 41451da177e4SLinus Torvalds int rc; 4146f3eb5384SStefan Weinhuber struct ccw1 *ccw; 4147f932bceaSStefan Weinhuber int useglobal; 41481da177e4SLinus Torvalds 41491da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 41501da177e4SLinus Torvalds return -EACCES; 41511da177e4SLinus Torvalds 4152f932bceaSStefan Weinhuber useglobal = 0; 415368b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 41541da177e4SLinus Torvalds if (IS_ERR(cqr)) { 4155f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 4156f932bceaSStefan Weinhuber useglobal = 1; 4157f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 4158f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 4159f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 4160f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 4161f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 4162f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 4163f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 41641da177e4SLinus Torvalds } 4165f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 4166f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RESERVE; 4167f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4168f3eb5384SStefan Weinhuber ccw->count = 32; 4169f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 41708e09f215SStefan Weinhuber cqr->startdev = device; 41718e09f215SStefan Weinhuber cqr->memdev = device; 41721da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 41731c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4174336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 41751da177e4SLinus Torvalds cqr->expires = 2 * HZ; 41761aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 41771da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 41781da177e4SLinus Torvalds 41791da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 41805a27e60dSStefan Weinhuber if (!rc) 41815a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 41821da177e4SLinus Torvalds 4183f932bceaSStefan Weinhuber if (useglobal) 4184f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 4185f932bceaSStefan Weinhuber else 41868e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 41871da177e4SLinus Torvalds return rc; 41881da177e4SLinus Torvalds } 41891da177e4SLinus Torvalds 41901da177e4SLinus Torvalds /* 41911da177e4SLinus Torvalds * Steal lock ioctl - unconditional reserve device. 41921da177e4SLinus Torvalds * Buils a channel programm to break a device's reservation. 41931da177e4SLinus Torvalds * (unconditional reserve) 41941da177e4SLinus Torvalds */ 41951da177e4SLinus Torvalds static int 41961107ccfbSChristoph Hellwig dasd_eckd_steal_lock(struct dasd_device *device) 41971da177e4SLinus Torvalds { 41981da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 41991da177e4SLinus Torvalds int rc; 4200f3eb5384SStefan Weinhuber struct ccw1 *ccw; 4201f932bceaSStefan Weinhuber int useglobal; 42021da177e4SLinus Torvalds 42031da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 42041da177e4SLinus Torvalds return -EACCES; 42051da177e4SLinus Torvalds 4206f932bceaSStefan Weinhuber useglobal = 0; 420768b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 42081da177e4SLinus Torvalds if (IS_ERR(cqr)) { 4209f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 4210f932bceaSStefan Weinhuber useglobal = 1; 4211f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 4212f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 4213f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 4214f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 4215f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 4216f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 4217f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 42181da177e4SLinus Torvalds } 4219f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 4220f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SLCK; 4221f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4222f3eb5384SStefan Weinhuber ccw->count = 32; 4223f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 42248e09f215SStefan Weinhuber cqr->startdev = device; 42258e09f215SStefan Weinhuber cqr->memdev = device; 42261da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 42271c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4228336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 42291da177e4SLinus Torvalds cqr->expires = 2 * HZ; 42301aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 42311da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 42321da177e4SLinus Torvalds 42331da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 42345a27e60dSStefan Weinhuber if (!rc) 42355a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 42361da177e4SLinus Torvalds 4237f932bceaSStefan Weinhuber if (useglobal) 4238f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 4239f932bceaSStefan Weinhuber else 42408e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 42411da177e4SLinus Torvalds return rc; 42421da177e4SLinus Torvalds } 42431da177e4SLinus Torvalds 42441da177e4SLinus Torvalds /* 4245196339f1SStefan Weinhuber * SNID - Sense Path Group ID 4246196339f1SStefan Weinhuber * This ioctl may be used in situations where I/O is stalled due to 4247196339f1SStefan Weinhuber * a reserve, so if the normal dasd_smalloc_request fails, we use the 4248196339f1SStefan Weinhuber * preallocated dasd_reserve_req. 4249196339f1SStefan Weinhuber */ 4250196339f1SStefan Weinhuber static int dasd_eckd_snid(struct dasd_device *device, 4251196339f1SStefan Weinhuber void __user *argp) 4252196339f1SStefan Weinhuber { 4253196339f1SStefan Weinhuber struct dasd_ccw_req *cqr; 4254196339f1SStefan Weinhuber int rc; 4255196339f1SStefan Weinhuber struct ccw1 *ccw; 4256196339f1SStefan Weinhuber int useglobal; 4257196339f1SStefan Weinhuber struct dasd_snid_ioctl_data usrparm; 4258196339f1SStefan Weinhuber 4259196339f1SStefan Weinhuber if (!capable(CAP_SYS_ADMIN)) 4260196339f1SStefan Weinhuber return -EACCES; 4261196339f1SStefan Weinhuber 4262196339f1SStefan Weinhuber if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 4263196339f1SStefan Weinhuber return -EFAULT; 4264196339f1SStefan Weinhuber 4265196339f1SStefan Weinhuber useglobal = 0; 4266196339f1SStefan Weinhuber cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 4267196339f1SStefan Weinhuber sizeof(struct dasd_snid_data), device); 4268196339f1SStefan Weinhuber if (IS_ERR(cqr)) { 4269196339f1SStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 4270196339f1SStefan Weinhuber useglobal = 1; 4271196339f1SStefan Weinhuber cqr = &dasd_reserve_req->cqr; 4272196339f1SStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 4273196339f1SStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 4274196339f1SStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 4275196339f1SStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 4276196339f1SStefan Weinhuber cqr->data = &dasd_reserve_req->data; 4277196339f1SStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 4278196339f1SStefan Weinhuber } 4279196339f1SStefan Weinhuber ccw = cqr->cpaddr; 4280196339f1SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SNID; 4281196339f1SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4282196339f1SStefan Weinhuber ccw->count = 12; 4283196339f1SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 4284196339f1SStefan Weinhuber cqr->startdev = device; 4285196339f1SStefan Weinhuber cqr->memdev = device; 4286196339f1SStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 4287196339f1SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 42885a27e60dSStefan Weinhuber set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 4289196339f1SStefan Weinhuber cqr->retries = 5; 4290196339f1SStefan Weinhuber cqr->expires = 10 * HZ; 42911aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 4292196339f1SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 4293196339f1SStefan Weinhuber cqr->lpm = usrparm.path_mask; 4294196339f1SStefan Weinhuber 4295196339f1SStefan Weinhuber rc = dasd_sleep_on_immediatly(cqr); 4296196339f1SStefan Weinhuber /* verify that I/O processing didn't modify the path mask */ 4297196339f1SStefan Weinhuber if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) 4298196339f1SStefan Weinhuber rc = -EIO; 4299196339f1SStefan Weinhuber if (!rc) { 4300196339f1SStefan Weinhuber usrparm.data = *((struct dasd_snid_data *)cqr->data); 4301196339f1SStefan Weinhuber if (copy_to_user(argp, &usrparm, sizeof(usrparm))) 4302196339f1SStefan Weinhuber rc = -EFAULT; 4303196339f1SStefan Weinhuber } 4304196339f1SStefan Weinhuber 4305196339f1SStefan Weinhuber if (useglobal) 4306196339f1SStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 4307196339f1SStefan Weinhuber else 4308196339f1SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 4309196339f1SStefan Weinhuber return rc; 4310196339f1SStefan Weinhuber } 4311196339f1SStefan Weinhuber 4312196339f1SStefan Weinhuber /* 43131da177e4SLinus Torvalds * Read performance statistics 43141da177e4SLinus Torvalds */ 43151da177e4SLinus Torvalds static int 43161107ccfbSChristoph Hellwig dasd_eckd_performance(struct dasd_device *device, void __user *argp) 43171da177e4SLinus Torvalds { 43181da177e4SLinus Torvalds struct dasd_psf_prssd_data *prssdp; 43191da177e4SLinus Torvalds struct dasd_rssd_perf_stats_t *stats; 43201da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 43211da177e4SLinus Torvalds struct ccw1 *ccw; 43221da177e4SLinus Torvalds int rc; 43231da177e4SLinus Torvalds 432468b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 43251da177e4SLinus Torvalds (sizeof(struct dasd_psf_prssd_data) + 43261da177e4SLinus Torvalds sizeof(struct dasd_rssd_perf_stats_t)), 43271da177e4SLinus Torvalds device); 43281da177e4SLinus Torvalds if (IS_ERR(cqr)) { 4329fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 43301da177e4SLinus Torvalds "Could not allocate initialization request"); 43311da177e4SLinus Torvalds return PTR_ERR(cqr); 43321da177e4SLinus Torvalds } 43338e09f215SStefan Weinhuber cqr->startdev = device; 43348e09f215SStefan Weinhuber cqr->memdev = device; 43351da177e4SLinus Torvalds cqr->retries = 0; 4336eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 43371da177e4SLinus Torvalds cqr->expires = 10 * HZ; 43381da177e4SLinus Torvalds 43391da177e4SLinus Torvalds /* Prepare for Read Subsystem Data */ 43401da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 43411da177e4SLinus Torvalds memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 43421da177e4SLinus Torvalds prssdp->order = PSF_ORDER_PRSSD; 43435d67d164SJoe Perches prssdp->suborder = 0x01; /* Performance Statistics */ 43441da177e4SLinus Torvalds prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 43451da177e4SLinus Torvalds 43461da177e4SLinus Torvalds ccw = cqr->cpaddr; 43471da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_PSF; 43481da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_psf_prssd_data); 43491da177e4SLinus Torvalds ccw->flags |= CCW_FLAG_CC; 43501da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) prssdp; 43511da177e4SLinus Torvalds 43521da177e4SLinus Torvalds /* Read Subsystem Data - Performance Statistics */ 43531da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 43541da177e4SLinus Torvalds memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 43551da177e4SLinus Torvalds 43561da177e4SLinus Torvalds ccw++; 43571da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_RSSD; 43581da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 43591da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) stats; 43601da177e4SLinus Torvalds 43611aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 43621da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 43631da177e4SLinus Torvalds rc = dasd_sleep_on(cqr); 43641da177e4SLinus Torvalds if (rc == 0) { 43651da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 43661da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 43671107ccfbSChristoph Hellwig if (copy_to_user(argp, stats, 43681107ccfbSChristoph Hellwig sizeof(struct dasd_rssd_perf_stats_t))) 43691107ccfbSChristoph Hellwig rc = -EFAULT; 43701da177e4SLinus Torvalds } 43718e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 43721da177e4SLinus Torvalds return rc; 43731da177e4SLinus Torvalds } 43741da177e4SLinus Torvalds 43751da177e4SLinus Torvalds /* 43761da177e4SLinus Torvalds * Get attributes (cache operations) 43771da177e4SLinus Torvalds * Returnes the cache attributes used in Define Extend (DE). 43781da177e4SLinus Torvalds */ 43791da177e4SLinus Torvalds static int 43801107ccfbSChristoph Hellwig dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 43811da177e4SLinus Torvalds { 4382543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 43831107ccfbSChristoph Hellwig struct attrib_data_t attrib = private->attrib; 43841da177e4SLinus Torvalds int rc; 43851da177e4SLinus Torvalds 43861da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 43871da177e4SLinus Torvalds return -EACCES; 43881107ccfbSChristoph Hellwig if (!argp) 43891da177e4SLinus Torvalds return -EINVAL; 43901da177e4SLinus Torvalds 43911107ccfbSChristoph Hellwig rc = 0; 43921107ccfbSChristoph Hellwig if (copy_to_user(argp, (long *) &attrib, 43931107ccfbSChristoph Hellwig sizeof(struct attrib_data_t))) 43941107ccfbSChristoph Hellwig rc = -EFAULT; 43951da177e4SLinus Torvalds 43961da177e4SLinus Torvalds return rc; 43971da177e4SLinus Torvalds } 43981da177e4SLinus Torvalds 43991da177e4SLinus Torvalds /* 44001da177e4SLinus Torvalds * Set attributes (cache operations) 44011da177e4SLinus Torvalds * Stores the attributes for cache operation to be used in Define Extend (DE). 44021da177e4SLinus Torvalds */ 44031da177e4SLinus Torvalds static int 44041107ccfbSChristoph Hellwig dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 44051da177e4SLinus Torvalds { 4406543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 44071da177e4SLinus Torvalds struct attrib_data_t attrib; 44081da177e4SLinus Torvalds 44091da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 44101da177e4SLinus Torvalds return -EACCES; 44111107ccfbSChristoph Hellwig if (!argp) 44121da177e4SLinus Torvalds return -EINVAL; 44131da177e4SLinus Torvalds 44141107ccfbSChristoph Hellwig if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 44151da177e4SLinus Torvalds return -EFAULT; 44161da177e4SLinus Torvalds private->attrib = attrib; 44171da177e4SLinus Torvalds 4418fc19f381SStefan Haberland dev_info(&device->cdev->dev, 4419fc19f381SStefan Haberland "The DASD cache mode was set to %x (%i cylinder prestage)\n", 44201da177e4SLinus Torvalds private->attrib.operation, private->attrib.nr_cyl); 44211da177e4SLinus Torvalds return 0; 44221da177e4SLinus Torvalds } 44231da177e4SLinus Torvalds 4424ab1d848fSNigel Hislop /* 4425ab1d848fSNigel Hislop * Issue syscall I/O to EMC Symmetrix array. 4426ab1d848fSNigel Hislop * CCWs are PSF and RSSD 4427ab1d848fSNigel Hislop */ 4428ab1d848fSNigel Hislop static int dasd_symm_io(struct dasd_device *device, void __user *argp) 4429ab1d848fSNigel Hislop { 4430ab1d848fSNigel Hislop struct dasd_symmio_parms usrparm; 4431ab1d848fSNigel Hislop char *psf_data, *rssd_result; 4432ab1d848fSNigel Hislop struct dasd_ccw_req *cqr; 4433ab1d848fSNigel Hislop struct ccw1 *ccw; 443452898025SNigel Hislop char psf0, psf1; 4435ab1d848fSNigel Hislop int rc; 4436ab1d848fSNigel Hislop 443752898025SNigel Hislop if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) 443852898025SNigel Hislop return -EACCES; 443952898025SNigel Hislop psf0 = psf1 = 0; 444052898025SNigel Hislop 4441ab1d848fSNigel Hislop /* Copy parms from caller */ 4442ab1d848fSNigel Hislop rc = -EFAULT; 4443ab1d848fSNigel Hislop if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 4444ab1d848fSNigel Hislop goto out; 444592d62891SHeiko Carstens if (is_compat_task()) { 4446ab1d848fSNigel Hislop /* Make sure pointers are sane even on 31 bit. */ 4447ab1d848fSNigel Hislop rc = -EINVAL; 4448f8b06859SHeiko Carstens if ((usrparm.psf_data >> 32) != 0) 4449ab1d848fSNigel Hislop goto out; 4450f8b06859SHeiko Carstens if ((usrparm.rssd_result >> 32) != 0) 4451f8b06859SHeiko Carstens goto out; 4452f8b06859SHeiko Carstens usrparm.psf_data &= 0x7fffffffULL; 4453f8b06859SHeiko Carstens usrparm.rssd_result &= 0x7fffffffULL; 4454ab1d848fSNigel Hislop } 4455ab1d848fSNigel Hislop /* alloc I/O data area */ 4456ab1d848fSNigel Hislop psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 4457ab1d848fSNigel Hislop rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 4458ab1d848fSNigel Hislop if (!psf_data || !rssd_result) { 4459ab1d848fSNigel Hislop rc = -ENOMEM; 4460ab1d848fSNigel Hislop goto out_free; 4461ab1d848fSNigel Hislop } 4462ab1d848fSNigel Hislop 4463ab1d848fSNigel Hislop /* get syscall header from user space */ 4464ab1d848fSNigel Hislop rc = -EFAULT; 4465ab1d848fSNigel Hislop if (copy_from_user(psf_data, 4466ab1d848fSNigel Hislop (void __user *)(unsigned long) usrparm.psf_data, 4467ab1d848fSNigel Hislop usrparm.psf_data_len)) 4468ab1d848fSNigel Hislop goto out_free; 446952898025SNigel Hislop psf0 = psf_data[0]; 447052898025SNigel Hislop psf1 = psf_data[1]; 4471ab1d848fSNigel Hislop 4472ab1d848fSNigel Hislop /* setup CCWs for PSF + RSSD */ 447368b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device); 4474ab1d848fSNigel Hislop if (IS_ERR(cqr)) { 4475fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 4476ab1d848fSNigel Hislop "Could not allocate initialization request"); 4477ab1d848fSNigel Hislop rc = PTR_ERR(cqr); 4478ab1d848fSNigel Hislop goto out_free; 4479ab1d848fSNigel Hislop } 4480ab1d848fSNigel Hislop 4481ab1d848fSNigel Hislop cqr->startdev = device; 4482ab1d848fSNigel Hislop cqr->memdev = device; 4483ab1d848fSNigel Hislop cqr->retries = 3; 4484ab1d848fSNigel Hislop cqr->expires = 10 * HZ; 44851aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 4486ab1d848fSNigel Hislop cqr->status = DASD_CQR_FILLED; 4487ab1d848fSNigel Hislop 4488ab1d848fSNigel Hislop /* Build the ccws */ 4489ab1d848fSNigel Hislop ccw = cqr->cpaddr; 4490ab1d848fSNigel Hislop 4491ab1d848fSNigel Hislop /* PSF ccw */ 4492ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_PSF; 4493ab1d848fSNigel Hislop ccw->count = usrparm.psf_data_len; 4494ab1d848fSNigel Hislop ccw->flags |= CCW_FLAG_CC; 4495ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) psf_data; 4496ab1d848fSNigel Hislop 4497ab1d848fSNigel Hislop ccw++; 4498ab1d848fSNigel Hislop 4499ab1d848fSNigel Hislop /* RSSD ccw */ 4500ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_RSSD; 4501ab1d848fSNigel Hislop ccw->count = usrparm.rssd_result_len; 4502ab1d848fSNigel Hislop ccw->flags = CCW_FLAG_SLI ; 4503ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) rssd_result; 4504ab1d848fSNigel Hislop 4505ab1d848fSNigel Hislop rc = dasd_sleep_on(cqr); 4506ab1d848fSNigel Hislop if (rc) 4507ab1d848fSNigel Hislop goto out_sfree; 4508ab1d848fSNigel Hislop 4509ab1d848fSNigel Hislop rc = -EFAULT; 4510ab1d848fSNigel Hislop if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 4511ab1d848fSNigel Hislop rssd_result, usrparm.rssd_result_len)) 4512ab1d848fSNigel Hislop goto out_sfree; 4513ab1d848fSNigel Hislop rc = 0; 4514ab1d848fSNigel Hislop 4515ab1d848fSNigel Hislop out_sfree: 4516ab1d848fSNigel Hislop dasd_sfree_request(cqr, cqr->memdev); 4517ab1d848fSNigel Hislop out_free: 4518ab1d848fSNigel Hislop kfree(rssd_result); 4519ab1d848fSNigel Hislop kfree(psf_data); 4520ab1d848fSNigel Hislop out: 452152898025SNigel Hislop DBF_DEV_EVENT(DBF_WARNING, device, 452252898025SNigel Hislop "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", 452352898025SNigel Hislop (int) psf0, (int) psf1, rc); 4524ab1d848fSNigel Hislop return rc; 4525ab1d848fSNigel Hislop } 4526ab1d848fSNigel Hislop 45271107ccfbSChristoph Hellwig static int 45288e09f215SStefan Weinhuber dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 45291107ccfbSChristoph Hellwig { 45308e09f215SStefan Weinhuber struct dasd_device *device = block->base; 45318e09f215SStefan Weinhuber 45321107ccfbSChristoph Hellwig switch (cmd) { 45331107ccfbSChristoph Hellwig case BIODASDGATTR: 45341107ccfbSChristoph Hellwig return dasd_eckd_get_attrib(device, argp); 45351107ccfbSChristoph Hellwig case BIODASDSATTR: 45361107ccfbSChristoph Hellwig return dasd_eckd_set_attrib(device, argp); 45371107ccfbSChristoph Hellwig case BIODASDPSRD: 45381107ccfbSChristoph Hellwig return dasd_eckd_performance(device, argp); 45391107ccfbSChristoph Hellwig case BIODASDRLSE: 45401107ccfbSChristoph Hellwig return dasd_eckd_release(device); 45411107ccfbSChristoph Hellwig case BIODASDRSRV: 45421107ccfbSChristoph Hellwig return dasd_eckd_reserve(device); 45431107ccfbSChristoph Hellwig case BIODASDSLCK: 45441107ccfbSChristoph Hellwig return dasd_eckd_steal_lock(device); 4545196339f1SStefan Weinhuber case BIODASDSNID: 4546196339f1SStefan Weinhuber return dasd_eckd_snid(device, argp); 4547ab1d848fSNigel Hislop case BIODASDSYMMIO: 4548ab1d848fSNigel Hislop return dasd_symm_io(device, argp); 45491107ccfbSChristoph Hellwig default: 45506b79d14eSHeiko Carstens return -ENOTTY; 45511107ccfbSChristoph Hellwig } 45521107ccfbSChristoph Hellwig } 45531107ccfbSChristoph Hellwig 45541da177e4SLinus Torvalds /* 4555445b5b49SHorst Hummel * Dump the range of CCWs into 'page' buffer 4556445b5b49SHorst Hummel * and return number of printed chars. 4557445b5b49SHorst Hummel */ 45584d284cacSHeiko Carstens static int 4559445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 4560445b5b49SHorst Hummel { 4561445b5b49SHorst Hummel int len, count; 4562445b5b49SHorst Hummel char *datap; 4563445b5b49SHorst Hummel 4564445b5b49SHorst Hummel len = 0; 4565445b5b49SHorst Hummel while (from <= to) { 4566773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4567445b5b49SHorst Hummel " CCW %p: %08X %08X DAT:", 4568445b5b49SHorst Hummel from, ((int *) from)[0], ((int *) from)[1]); 4569445b5b49SHorst Hummel 4570445b5b49SHorst Hummel /* get pointer to data (consider IDALs) */ 4571445b5b49SHorst Hummel if (from->flags & CCW_FLAG_IDA) 4572445b5b49SHorst Hummel datap = (char *) *((addr_t *) (addr_t) from->cda); 4573445b5b49SHorst Hummel else 4574445b5b49SHorst Hummel datap = (char *) ((addr_t) from->cda); 4575445b5b49SHorst Hummel 4576445b5b49SHorst Hummel /* dump data (max 32 bytes) */ 4577445b5b49SHorst Hummel for (count = 0; count < from->count && count < 32; count++) { 4578445b5b49SHorst Hummel if (count % 8 == 0) len += sprintf(page + len, " "); 4579445b5b49SHorst Hummel if (count % 4 == 0) len += sprintf(page + len, " "); 4580445b5b49SHorst Hummel len += sprintf(page + len, "%02x", datap[count]); 4581445b5b49SHorst Hummel } 4582445b5b49SHorst Hummel len += sprintf(page + len, "\n"); 4583445b5b49SHorst Hummel from++; 4584445b5b49SHorst Hummel } 4585445b5b49SHorst Hummel return len; 4586445b5b49SHorst Hummel } 4587445b5b49SHorst Hummel 4588fc19f381SStefan Haberland static void 4589aeec92caSStefan Haberland dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 4590aeec92caSStefan Haberland char *reason) 4591fc19f381SStefan Haberland { 4592fc19f381SStefan Haberland u64 *sense; 4593a5a0061fSStefan Weinhuber u64 *stat; 4594fc19f381SStefan Haberland 4595aeec92caSStefan Haberland sense = (u64 *) dasd_get_sense(irb); 4596a5a0061fSStefan Weinhuber stat = (u64 *) &irb->scsw; 4597fc19f381SStefan Haberland if (sense) { 4598a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " 4599a5a0061fSStefan Weinhuber "%016llx %016llx %016llx %016llx", 4600a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 4601ed3640b2SStefan Haberland sense[0], sense[1], sense[2], sense[3]); 4602fc19f381SStefan Haberland } else { 4603a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", 4604a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 4605a5a0061fSStefan Weinhuber "NO VALID SENSE"); 4606fc19f381SStefan Haberland } 4607fc19f381SStefan Haberland } 4608fc19f381SStefan Haberland 4609445b5b49SHorst Hummel /* 46101da177e4SLinus Torvalds * Print sense data and related channel program. 46111da177e4SLinus Torvalds * Parts are printed because printk buffer is only 1024 bytes. 46121da177e4SLinus Torvalds */ 4613f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 46148e09f215SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 46151da177e4SLinus Torvalds { 46161da177e4SLinus Torvalds char *page; 4617445b5b49SHorst Hummel struct ccw1 *first, *last, *fail, *from, *to; 4618445b5b49SHorst Hummel int len, sl, sct; 46191da177e4SLinus Torvalds 46201da177e4SLinus Torvalds page = (char *) get_zeroed_page(GFP_ATOMIC); 46211da177e4SLinus Torvalds if (page == NULL) { 4622fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 4623fc19f381SStefan Haberland "No memory to dump sense data\n"); 46241da177e4SLinus Torvalds return; 46251da177e4SLinus Torvalds } 4626445b5b49SHorst Hummel /* dump the sense data */ 4627773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 46281da177e4SLinus Torvalds " I/O status report for device %s:\n", 46292a0217d5SKay Sievers dev_name(&device->cdev->dev)); 4630773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4631a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 4632a5a0061fSStefan Weinhuber "CS:%02X RC:%d\n", 4633a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 4634a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 4635a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 4636a5a0061fSStefan Weinhuber req ? req->intrc : 0); 4637773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 46381da177e4SLinus Torvalds " device %s: Failing CCW: %p\n", 46392a0217d5SKay Sievers dev_name(&device->cdev->dev), 464023d805b6SPeter Oberparleiter (void *) (addr_t) irb->scsw.cmd.cpa); 46411da177e4SLinus Torvalds if (irb->esw.esw0.erw.cons) { 46421da177e4SLinus Torvalds for (sl = 0; sl < 4; sl++) { 4643773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 46441da177e4SLinus Torvalds " Sense(hex) %2d-%2d:", 46451da177e4SLinus Torvalds (8 * sl), ((8 * sl) + 7)); 46461da177e4SLinus Torvalds 46471da177e4SLinus Torvalds for (sct = 0; sct < 8; sct++) { 46481da177e4SLinus Torvalds len += sprintf(page + len, " %02x", 46491da177e4SLinus Torvalds irb->ecw[8 * sl + sct]); 46501da177e4SLinus Torvalds } 46511da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 46521da177e4SLinus Torvalds } 46531da177e4SLinus Torvalds 46541da177e4SLinus Torvalds if (irb->ecw[27] & DASD_SENSE_BIT_0) { 46551da177e4SLinus Torvalds /* 24 Byte Sense Data */ 4656773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 46571da177e4SLinus Torvalds " 24 Byte: %x MSG %x, " 46581da177e4SLinus Torvalds "%s MSGb to SYSOP\n", 46591da177e4SLinus Torvalds irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 46601da177e4SLinus Torvalds irb->ecw[1] & 0x10 ? "" : "no"); 46611da177e4SLinus Torvalds } else { 46621da177e4SLinus Torvalds /* 32 Byte Sense Data */ 4663773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 46641da177e4SLinus Torvalds " 32 Byte: Format: %x " 46651da177e4SLinus Torvalds "Exception class %x\n", 46661da177e4SLinus Torvalds irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 46671da177e4SLinus Torvalds } 46681da177e4SLinus Torvalds } else { 4669773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 46701da177e4SLinus Torvalds " SORRY - NO VALID SENSE AVAILABLE\n"); 46711da177e4SLinus Torvalds } 4672773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 46731da177e4SLinus Torvalds 46748e09f215SStefan Weinhuber if (req) { 46758e09f215SStefan Weinhuber /* req == NULL for unsolicited interrupts */ 4676445b5b49SHorst Hummel /* dump the Channel Program (max 140 Bytes per line) */ 4677445b5b49SHorst Hummel /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 4678445b5b49SHorst Hummel first = req->cpaddr; 4679445b5b49SHorst Hummel for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 4680445b5b49SHorst Hummel to = min(first + 6, last); 4681773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 46821da177e4SLinus Torvalds " Related CP in req: %p\n", req); 4683445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(first, to, page + len); 4684773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 46851da177e4SLinus Torvalds 4686445b5b49SHorst Hummel /* print failing CCW area (maximum 4) */ 4687445b5b49SHorst Hummel /* scsw->cda is either valid or zero */ 46881da177e4SLinus Torvalds len = 0; 4689445b5b49SHorst Hummel from = ++to; 469023d805b6SPeter Oberparleiter fail = (struct ccw1 *)(addr_t) 469123d805b6SPeter Oberparleiter irb->scsw.cmd.cpa; /* failing CCW */ 4692445b5b49SHorst Hummel if (from < fail - 2) { 4693445b5b49SHorst Hummel from = fail - 2; /* there is a gap - print header */ 4694773bab4aSSebastian Ott len += sprintf(page, PRINTK_HEADER "......\n"); 46951da177e4SLinus Torvalds } 4696445b5b49SHorst Hummel to = min(fail + 1, last); 4697445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, to, page + len); 46981da177e4SLinus Torvalds 4699445b5b49SHorst Hummel /* print last CCWs (maximum 2) */ 4700445b5b49SHorst Hummel from = max(from, ++to); 4701445b5b49SHorst Hummel if (from < last - 1) { 4702445b5b49SHorst Hummel from = last - 1; /* there is a gap - print header */ 4703773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER "......\n"); 47041da177e4SLinus Torvalds } 4705445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, last, page + len); 47061da177e4SLinus Torvalds if (len > 0) 4707773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 47088e09f215SStefan Weinhuber } 47091da177e4SLinus Torvalds free_page((unsigned long) page); 47101da177e4SLinus Torvalds } 47111da177e4SLinus Torvalds 4712f3eb5384SStefan Weinhuber 4713f3eb5384SStefan Weinhuber /* 4714f3eb5384SStefan Weinhuber * Print sense data from a tcw. 4715f3eb5384SStefan Weinhuber */ 4716f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 4717f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 4718f3eb5384SStefan Weinhuber { 4719f3eb5384SStefan Weinhuber char *page; 4720f3eb5384SStefan Weinhuber int len, sl, sct, residual; 4721f3eb5384SStefan Weinhuber struct tsb *tsb; 4722ef19298bSStefan Weinhuber u8 *sense, *rcq; 4723f3eb5384SStefan Weinhuber 4724f3eb5384SStefan Weinhuber page = (char *) get_zeroed_page(GFP_ATOMIC); 4725f3eb5384SStefan Weinhuber if (page == NULL) { 4726fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, " %s", 4727f3eb5384SStefan Weinhuber "No memory to dump sense data"); 4728f3eb5384SStefan Weinhuber return; 4729f3eb5384SStefan Weinhuber } 4730f3eb5384SStefan Weinhuber /* dump the sense data */ 4731773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 4732f3eb5384SStefan Weinhuber " I/O status report for device %s:\n", 4733f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev)); 4734773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4735a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 4736a5a0061fSStefan Weinhuber "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", 4737a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 4738a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 4739a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 4740a521b048SStefan Haberland irb->scsw.tm.fcxs, 4741a521b048SStefan Haberland (irb->scsw.tm.ifob << 7) | irb->scsw.tm.sesq, 4742a5a0061fSStefan Weinhuber req ? req->intrc : 0); 4743773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4744f3eb5384SStefan Weinhuber " device %s: Failing TCW: %p\n", 4745f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev), 4746f3eb5384SStefan Weinhuber (void *) (addr_t) irb->scsw.tm.tcw); 4747f3eb5384SStefan Weinhuber 4748f3eb5384SStefan Weinhuber tsb = NULL; 4749f3eb5384SStefan Weinhuber sense = NULL; 4750a5a0061fSStefan Weinhuber if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) 4751f3eb5384SStefan Weinhuber tsb = tcw_get_tsb( 4752f3eb5384SStefan Weinhuber (struct tcw *)(unsigned long)irb->scsw.tm.tcw); 4753f3eb5384SStefan Weinhuber 4754b8fde722SStefan Haberland if (tsb) { 4755773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4756f3eb5384SStefan Weinhuber " tsb->length %d\n", tsb->length); 4757773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4758f3eb5384SStefan Weinhuber " tsb->flags %x\n", tsb->flags); 4759773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4760f3eb5384SStefan Weinhuber " tsb->dcw_offset %d\n", tsb->dcw_offset); 4761773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4762f3eb5384SStefan Weinhuber " tsb->count %d\n", tsb->count); 4763f3eb5384SStefan Weinhuber residual = tsb->count - 28; 4764773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4765f3eb5384SStefan Weinhuber " residual %d\n", residual); 4766f3eb5384SStefan Weinhuber 4767f3eb5384SStefan Weinhuber switch (tsb->flags & 0x07) { 4768f3eb5384SStefan Weinhuber case 1: /* tsa_iostat */ 4769773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4770f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_time %d\n", 4771f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_time); 4772773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4773f3eb5384SStefan Weinhuber " tsb->tsa.iostat.def_time %d\n", 4774f3eb5384SStefan Weinhuber tsb->tsa.iostat.def_time); 4775773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4776f3eb5384SStefan Weinhuber " tsb->tsa.iostat.queue_time %d\n", 4777f3eb5384SStefan Weinhuber tsb->tsa.iostat.queue_time); 4778773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4779f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_busy_time %d\n", 4780f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_busy_time); 4781773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4782f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_act_time %d\n", 4783f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_act_time); 4784f3eb5384SStefan Weinhuber sense = tsb->tsa.iostat.sense; 4785f3eb5384SStefan Weinhuber break; 4786f3eb5384SStefan Weinhuber case 2: /* ts_ddpc */ 4787773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4788f3eb5384SStefan Weinhuber " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); 4789ef19298bSStefan Weinhuber for (sl = 0; sl < 2; sl++) { 4790773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4791ef19298bSStefan Weinhuber " tsb->tsa.ddpc.rcq %2d-%2d: ", 4792ef19298bSStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 4793ef19298bSStefan Weinhuber rcq = tsb->tsa.ddpc.rcq; 4794f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 4795f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 4796ef19298bSStefan Weinhuber rcq[8 * sl + sct]); 4797f3eb5384SStefan Weinhuber } 4798f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 4799f3eb5384SStefan Weinhuber } 4800f3eb5384SStefan Weinhuber sense = tsb->tsa.ddpc.sense; 4801f3eb5384SStefan Weinhuber break; 4802f3eb5384SStefan Weinhuber case 3: /* tsa_intrg */ 4803773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 48048693b914SColin Ian King " tsb->tsa.intrg.: not supported yet\n"); 4805f3eb5384SStefan Weinhuber break; 4806f3eb5384SStefan Weinhuber } 4807f3eb5384SStefan Weinhuber 4808f3eb5384SStefan Weinhuber if (sense) { 4809f3eb5384SStefan Weinhuber for (sl = 0; sl < 4; sl++) { 4810773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4811f3eb5384SStefan Weinhuber " Sense(hex) %2d-%2d:", 4812f3eb5384SStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 4813f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 4814f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 4815f3eb5384SStefan Weinhuber sense[8 * sl + sct]); 4816f3eb5384SStefan Weinhuber } 4817f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 4818f3eb5384SStefan Weinhuber } 4819f3eb5384SStefan Weinhuber 4820f3eb5384SStefan Weinhuber if (sense[27] & DASD_SENSE_BIT_0) { 4821f3eb5384SStefan Weinhuber /* 24 Byte Sense Data */ 4822773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4823f3eb5384SStefan Weinhuber " 24 Byte: %x MSG %x, " 4824f3eb5384SStefan Weinhuber "%s MSGb to SYSOP\n", 4825f3eb5384SStefan Weinhuber sense[7] >> 4, sense[7] & 0x0f, 4826f3eb5384SStefan Weinhuber sense[1] & 0x10 ? "" : "no"); 4827f3eb5384SStefan Weinhuber } else { 4828f3eb5384SStefan Weinhuber /* 32 Byte Sense Data */ 4829773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4830f3eb5384SStefan Weinhuber " 32 Byte: Format: %x " 4831f3eb5384SStefan Weinhuber "Exception class %x\n", 4832f3eb5384SStefan Weinhuber sense[6] & 0x0f, sense[22] >> 4); 4833f3eb5384SStefan Weinhuber } 4834f3eb5384SStefan Weinhuber } else { 4835773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4836f3eb5384SStefan Weinhuber " SORRY - NO VALID SENSE AVAILABLE\n"); 4837f3eb5384SStefan Weinhuber } 4838f3eb5384SStefan Weinhuber } else { 4839773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4840f3eb5384SStefan Weinhuber " SORRY - NO TSB DATA AVAILABLE\n"); 4841f3eb5384SStefan Weinhuber } 4842773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 4843f3eb5384SStefan Weinhuber free_page((unsigned long) page); 4844f3eb5384SStefan Weinhuber } 4845f3eb5384SStefan Weinhuber 4846f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense(struct dasd_device *device, 4847f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 4848f3eb5384SStefan Weinhuber { 48498fd57520SJan Höppner u8 *sense = dasd_get_sense(irb); 48508fd57520SJan Höppner 48518fd57520SJan Höppner if (scsw_is_tm(&irb->scsw)) { 48528fd57520SJan Höppner /* 48538fd57520SJan Höppner * In some cases the 'File Protected' or 'Incorrect Length' 48548fd57520SJan Höppner * error might be expected and log messages shouldn't be written 48558fd57520SJan Höppner * then. Check if the according suppress bit is set. 48568fd57520SJan Höppner */ 48578fd57520SJan Höppner if (sense && (sense[1] & SNS1_FILE_PROTECTED) && 48588fd57520SJan Höppner test_bit(DASD_CQR_SUPPRESS_FP, &req->flags)) 48598fd57520SJan Höppner return; 48608fd57520SJan Höppner if (scsw_cstat(&irb->scsw) == 0x40 && 48618fd57520SJan Höppner test_bit(DASD_CQR_SUPPRESS_IL, &req->flags)) 48628fd57520SJan Höppner return; 48638fd57520SJan Höppner 4864f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_tcw(device, req, irb); 48658fd57520SJan Höppner } else { 48668fd57520SJan Höppner /* 4867ab24fbd3SStefan Haberland * In some cases the 'Command Reject' or 'No Record Found' 4868ab24fbd3SStefan Haberland * error might be expected and log messages shouldn't be 4869ab24fbd3SStefan Haberland * written then. Check if the according suppress bit is set. 48708fd57520SJan Höppner */ 4871ab24fbd3SStefan Haberland if (sense && sense[0] & SNS0_CMD_REJECT && 4872ab24fbd3SStefan Haberland test_bit(DASD_CQR_SUPPRESS_CR, &req->flags)) 4873ab24fbd3SStefan Haberland return; 4874ab24fbd3SStefan Haberland 48758fd57520SJan Höppner if (sense && sense[1] & SNS1_NO_REC_FOUND && 48768fd57520SJan Höppner test_bit(DASD_CQR_SUPPRESS_NRF, &req->flags)) 48778fd57520SJan Höppner return; 48788fd57520SJan Höppner 4879f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_ccw(device, req, irb); 4880f3eb5384SStefan Weinhuber } 48818fd57520SJan Höppner } 4882f3eb5384SStefan Weinhuber 4883501183f2SStefan Haberland static int dasd_eckd_pm_freeze(struct dasd_device *device) 4884d41dd122SStefan Haberland { 4885d41dd122SStefan Haberland /* 4886d41dd122SStefan Haberland * the device should be disconnected from our LCU structure 4887d41dd122SStefan Haberland * on restore we will reconnect it and reread LCU specific 4888d41dd122SStefan Haberland * information like PAV support that might have changed 4889d41dd122SStefan Haberland */ 4890d41dd122SStefan Haberland dasd_alias_remove_device(device); 4891d41dd122SStefan Haberland dasd_alias_disconnect_device_from_lcu(device); 4892d41dd122SStefan Haberland 4893d41dd122SStefan Haberland return 0; 4894d41dd122SStefan Haberland } 4895d41dd122SStefan Haberland 4896501183f2SStefan Haberland static int dasd_eckd_restore_device(struct dasd_device *device) 4897d41dd122SStefan Haberland { 4898543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 48996fca97a9SStefan Haberland struct dasd_eckd_characteristics temp_rdc_data; 4900f9f8d02fSStefan Haberland int rc; 4901d41dd122SStefan Haberland struct dasd_uid temp_uid; 4902a7602f6cSStefan Haberland unsigned long flags; 4903ea4da6eaSStefan Haberland unsigned long cqr_flags = 0; 4904d41dd122SStefan Haberland 4905d41dd122SStefan Haberland /* Read Configuration Data */ 4906251afd69SStefan Haberland rc = dasd_eckd_read_conf(device); 4907251afd69SStefan Haberland if (rc) { 4908251afd69SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 4909251afd69SStefan Haberland "Read configuration data failed, rc=%d", rc); 4910251afd69SStefan Haberland goto out_err; 4911251afd69SStefan Haberland } 4912d41dd122SStefan Haberland 49132dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 49142dedf0d9SStefan Haberland /* Generate device unique id */ 49152dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 49162dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4917d41dd122SStefan Haberland if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) 4918a7602f6cSStefan Haberland dev_err(&device->cdev->dev, "The UID of the DASD has " 4919a7602f6cSStefan Haberland "changed\n"); 49202dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4921d41dd122SStefan Haberland if (rc) 4922d41dd122SStefan Haberland goto out_err; 4923d41dd122SStefan Haberland 4924d41dd122SStefan Haberland /* register lcu with alias handling, enable PAV if this is a new lcu */ 4925f9f8d02fSStefan Haberland rc = dasd_alias_make_device_known_to_lcu(device); 4926f9f8d02fSStefan Haberland if (rc) 4927251afd69SStefan Haberland goto out_err; 4928ea4da6eaSStefan Haberland 4929ea4da6eaSStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr_flags); 4930ea4da6eaSStefan Haberland dasd_eckd_validate_server(device, cqr_flags); 4931f4ac1d02SStefan Weinhuber 4932f4ac1d02SStefan Weinhuber /* RE-Read Configuration Data */ 4933251afd69SStefan Haberland rc = dasd_eckd_read_conf(device); 4934251afd69SStefan Haberland if (rc) { 4935251afd69SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 4936251afd69SStefan Haberland "Read configuration data failed, rc=%d", rc); 4937251afd69SStefan Haberland goto out_err2; 4938251afd69SStefan Haberland } 4939d41dd122SStefan Haberland 4940d41dd122SStefan Haberland /* Read Feature Codes */ 494168d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 4942d41dd122SStefan Haberland 4943d41dd122SStefan Haberland /* Read Device Characteristics */ 494468b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 49456fca97a9SStefan Haberland &temp_rdc_data, 64); 4946d41dd122SStefan Haberland if (rc) { 4947b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 4948b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 4949251afd69SStefan Haberland goto out_err2; 4950d41dd122SStefan Haberland } 4951a7602f6cSStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 49526fca97a9SStefan Haberland memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data)); 4953a7602f6cSStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4954d41dd122SStefan Haberland 4955d41dd122SStefan Haberland /* add device to alias management */ 4956d41dd122SStefan Haberland dasd_alias_add_device(device); 4957d41dd122SStefan Haberland 4958d41dd122SStefan Haberland return 0; 4959d41dd122SStefan Haberland 4960251afd69SStefan Haberland out_err2: 4961251afd69SStefan Haberland dasd_alias_disconnect_device_from_lcu(device); 4962d41dd122SStefan Haberland out_err: 4963e6125fbaSStefan Haberland return -1; 4964d41dd122SStefan Haberland } 4965d41dd122SStefan Haberland 4966501183f2SStefan Haberland static int dasd_eckd_reload_device(struct dasd_device *device) 4967501183f2SStefan Haberland { 4968543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 4969501183f2SStefan Haberland int rc, old_base; 49702dedf0d9SStefan Haberland char print_uid[60]; 49712dedf0d9SStefan Haberland struct dasd_uid uid; 49722dedf0d9SStefan Haberland unsigned long flags; 4973501183f2SStefan Haberland 497459a9ed5fSStefan Haberland /* 497559a9ed5fSStefan Haberland * remove device from alias handling to prevent new requests 497659a9ed5fSStefan Haberland * from being scheduled on the wrong alias device 497759a9ed5fSStefan Haberland */ 497859a9ed5fSStefan Haberland dasd_alias_remove_device(device); 497959a9ed5fSStefan Haberland 49802dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4981501183f2SStefan Haberland old_base = private->uid.base_unit_addr; 49822dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 49832dedf0d9SStefan Haberland 4984501183f2SStefan Haberland /* Read Configuration Data */ 4985501183f2SStefan Haberland rc = dasd_eckd_read_conf(device); 4986501183f2SStefan Haberland if (rc) 4987501183f2SStefan Haberland goto out_err; 4988501183f2SStefan Haberland 49892dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 4990501183f2SStefan Haberland if (rc) 4991501183f2SStefan Haberland goto out_err; 4992501183f2SStefan Haberland /* 4993501183f2SStefan Haberland * update unit address configuration and 4994501183f2SStefan Haberland * add device to alias management 4995501183f2SStefan Haberland */ 4996501183f2SStefan Haberland dasd_alias_update_add_device(device); 4997501183f2SStefan Haberland 49982dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &uid); 49992dedf0d9SStefan Haberland 50002dedf0d9SStefan Haberland if (old_base != uid.base_unit_addr) { 50012dedf0d9SStefan Haberland if (strlen(uid.vduit) > 0) 50022dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 50032dedf0d9SStefan Haberland "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial, 50042dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr, uid.vduit); 5005501183f2SStefan Haberland else 50062dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 50072dedf0d9SStefan Haberland "%s.%s.%04x.%02x", uid.vendor, uid.serial, 50082dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr); 5009501183f2SStefan Haberland 5010501183f2SStefan Haberland dev_info(&device->cdev->dev, 5011501183f2SStefan Haberland "An Alias device was reassigned to a new base device " 50122dedf0d9SStefan Haberland "with UID: %s\n", print_uid); 5013501183f2SStefan Haberland } 5014501183f2SStefan Haberland return 0; 5015501183f2SStefan Haberland 5016501183f2SStefan Haberland out_err: 5017501183f2SStefan Haberland return -1; 5018501183f2SStefan Haberland } 5019501183f2SStefan Haberland 50205db8440cSStefan Haberland static int dasd_eckd_read_message_buffer(struct dasd_device *device, 50215db8440cSStefan Haberland struct dasd_rssd_messages *messages, 50225db8440cSStefan Haberland __u8 lpum) 50235db8440cSStefan Haberland { 50245db8440cSStefan Haberland struct dasd_rssd_messages *message_buf; 50255db8440cSStefan Haberland struct dasd_psf_prssd_data *prssdp; 50265db8440cSStefan Haberland struct dasd_ccw_req *cqr; 50275db8440cSStefan Haberland struct ccw1 *ccw; 50285db8440cSStefan Haberland int rc; 50295db8440cSStefan Haberland 50305db8440cSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 50315db8440cSStefan Haberland (sizeof(struct dasd_psf_prssd_data) + 50325db8440cSStefan Haberland sizeof(struct dasd_rssd_messages)), 50335db8440cSStefan Haberland device); 50345db8440cSStefan Haberland if (IS_ERR(cqr)) { 50355db8440cSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 50365db8440cSStefan Haberland "Could not allocate read message buffer request"); 50375db8440cSStefan Haberland return PTR_ERR(cqr); 50385db8440cSStefan Haberland } 50395db8440cSStefan Haberland 5040af775210SStefan Haberland cqr->lpm = lpum; 5041af775210SStefan Haberland retry: 50425db8440cSStefan Haberland cqr->startdev = device; 50435db8440cSStefan Haberland cqr->memdev = device; 50445db8440cSStefan Haberland cqr->block = NULL; 50455db8440cSStefan Haberland cqr->expires = 10 * HZ; 50465db8440cSStefan Haberland set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 5047b179b037SStefan Haberland /* dasd_sleep_on_immediatly does not do complex error 5048b179b037SStefan Haberland * recovery so clear erp flag and set retry counter to 5049b179b037SStefan Haberland * do basic erp */ 5050b179b037SStefan Haberland clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 5051b179b037SStefan Haberland cqr->retries = 256; 50525db8440cSStefan Haberland 50535db8440cSStefan Haberland /* Prepare for Read Subsystem Data */ 50545db8440cSStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 50555db8440cSStefan Haberland memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 50565db8440cSStefan Haberland prssdp->order = PSF_ORDER_PRSSD; 50575db8440cSStefan Haberland prssdp->suborder = 0x03; /* Message Buffer */ 50585db8440cSStefan Haberland /* all other bytes of prssdp must be zero */ 50595db8440cSStefan Haberland 50605db8440cSStefan Haberland ccw = cqr->cpaddr; 50615db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 50625db8440cSStefan Haberland ccw->count = sizeof(struct dasd_psf_prssd_data); 50635db8440cSStefan Haberland ccw->flags |= CCW_FLAG_CC; 50645db8440cSStefan Haberland ccw->flags |= CCW_FLAG_SLI; 50655db8440cSStefan Haberland ccw->cda = (__u32)(addr_t) prssdp; 50665db8440cSStefan Haberland 50675db8440cSStefan Haberland /* Read Subsystem Data - message buffer */ 50685db8440cSStefan Haberland message_buf = (struct dasd_rssd_messages *) (prssdp + 1); 50695db8440cSStefan Haberland memset(message_buf, 0, sizeof(struct dasd_rssd_messages)); 50705db8440cSStefan Haberland 50715db8440cSStefan Haberland ccw++; 50725db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_RSSD; 50735db8440cSStefan Haberland ccw->count = sizeof(struct dasd_rssd_messages); 50745db8440cSStefan Haberland ccw->flags |= CCW_FLAG_SLI; 50755db8440cSStefan Haberland ccw->cda = (__u32)(addr_t) message_buf; 50765db8440cSStefan Haberland 50775db8440cSStefan Haberland cqr->buildclk = get_tod_clock(); 50785db8440cSStefan Haberland cqr->status = DASD_CQR_FILLED; 50795db8440cSStefan Haberland rc = dasd_sleep_on_immediatly(cqr); 50805db8440cSStefan Haberland if (rc == 0) { 50815db8440cSStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 50825db8440cSStefan Haberland message_buf = (struct dasd_rssd_messages *) 50835db8440cSStefan Haberland (prssdp + 1); 50845db8440cSStefan Haberland memcpy(messages, message_buf, 50855db8440cSStefan Haberland sizeof(struct dasd_rssd_messages)); 5086af775210SStefan Haberland } else if (cqr->lpm) { 5087af775210SStefan Haberland /* 5088af775210SStefan Haberland * on z/VM we might not be able to do I/O on the requested path 5089af775210SStefan Haberland * but instead we get the required information on any path 5090af775210SStefan Haberland * so retry with open path mask 5091af775210SStefan Haberland */ 5092af775210SStefan Haberland cqr->lpm = 0; 5093af775210SStefan Haberland goto retry; 50945db8440cSStefan Haberland } else 50955db8440cSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 50965db8440cSStefan Haberland "Reading messages failed with rc=%d\n" 50975db8440cSStefan Haberland , rc); 50985db8440cSStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 50995db8440cSStefan Haberland return rc; 51005db8440cSStefan Haberland } 51015db8440cSStefan Haberland 51025a3b7b11SStefan Haberland static int dasd_eckd_query_host_access(struct dasd_device *device, 51035a3b7b11SStefan Haberland struct dasd_psf_query_host_access *data) 51045a3b7b11SStefan Haberland { 51055a3b7b11SStefan Haberland struct dasd_eckd_private *private = device->private; 51065a3b7b11SStefan Haberland struct dasd_psf_query_host_access *host_access; 51075a3b7b11SStefan Haberland struct dasd_psf_prssd_data *prssdp; 51085a3b7b11SStefan Haberland struct dasd_ccw_req *cqr; 51095a3b7b11SStefan Haberland struct ccw1 *ccw; 51105a3b7b11SStefan Haberland int rc; 51115a3b7b11SStefan Haberland 51125a3b7b11SStefan Haberland /* not available for HYPER PAV alias devices */ 51135a3b7b11SStefan Haberland if (!device->block && private->lcu->pav == HYPER_PAV) 51145a3b7b11SStefan Haberland return -EOPNOTSUPP; 51155a3b7b11SStefan Haberland 5116ccd53fa2SStefan Haberland /* may not be supported by the storage server */ 5117ccd53fa2SStefan Haberland if (!(private->features.feature[14] & 0x80)) 5118ccd53fa2SStefan Haberland return -EOPNOTSUPP; 5119ccd53fa2SStefan Haberland 51205a3b7b11SStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 51215a3b7b11SStefan Haberland sizeof(struct dasd_psf_prssd_data) + 1, 51225a3b7b11SStefan Haberland device); 51235a3b7b11SStefan Haberland if (IS_ERR(cqr)) { 51245a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 51255a3b7b11SStefan Haberland "Could not allocate read message buffer request"); 51265a3b7b11SStefan Haberland return PTR_ERR(cqr); 51275a3b7b11SStefan Haberland } 51285a3b7b11SStefan Haberland host_access = kzalloc(sizeof(*host_access), GFP_KERNEL | GFP_DMA); 51295a3b7b11SStefan Haberland if (!host_access) { 51305a3b7b11SStefan Haberland dasd_sfree_request(cqr, device); 51315a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 51325a3b7b11SStefan Haberland "Could not allocate host_access buffer"); 51335a3b7b11SStefan Haberland return -ENOMEM; 51345a3b7b11SStefan Haberland } 51355a3b7b11SStefan Haberland cqr->startdev = device; 51365a3b7b11SStefan Haberland cqr->memdev = device; 51375a3b7b11SStefan Haberland cqr->block = NULL; 51385a3b7b11SStefan Haberland cqr->retries = 256; 51395a3b7b11SStefan Haberland cqr->expires = 10 * HZ; 51405a3b7b11SStefan Haberland 51415a3b7b11SStefan Haberland /* Prepare for Read Subsystem Data */ 51425a3b7b11SStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 51435a3b7b11SStefan Haberland memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 51445a3b7b11SStefan Haberland prssdp->order = PSF_ORDER_PRSSD; 51455a3b7b11SStefan Haberland prssdp->suborder = PSF_SUBORDER_QHA; /* query host access */ 51465a3b7b11SStefan Haberland /* LSS and Volume that will be queried */ 51475a3b7b11SStefan Haberland prssdp->lss = private->ned->ID; 51485a3b7b11SStefan Haberland prssdp->volume = private->ned->unit_addr; 51495a3b7b11SStefan Haberland /* all other bytes of prssdp must be zero */ 51505a3b7b11SStefan Haberland 51515a3b7b11SStefan Haberland ccw = cqr->cpaddr; 51525a3b7b11SStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 51535a3b7b11SStefan Haberland ccw->count = sizeof(struct dasd_psf_prssd_data); 51545a3b7b11SStefan Haberland ccw->flags |= CCW_FLAG_CC; 51555a3b7b11SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 51565a3b7b11SStefan Haberland ccw->cda = (__u32)(addr_t) prssdp; 51575a3b7b11SStefan Haberland 51585a3b7b11SStefan Haberland /* Read Subsystem Data - query host access */ 51595a3b7b11SStefan Haberland ccw++; 51605a3b7b11SStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_RSSD; 51615a3b7b11SStefan Haberland ccw->count = sizeof(struct dasd_psf_query_host_access); 51625a3b7b11SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 51635a3b7b11SStefan Haberland ccw->cda = (__u32)(addr_t) host_access; 51645a3b7b11SStefan Haberland 51655a3b7b11SStefan Haberland cqr->buildclk = get_tod_clock(); 51665a3b7b11SStefan Haberland cqr->status = DASD_CQR_FILLED; 5167ab24fbd3SStefan Haberland /* the command might not be supported, suppress error message */ 5168ab24fbd3SStefan Haberland __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); 5169f50af850SStefan Haberland rc = dasd_sleep_on_interruptible(cqr); 51705a3b7b11SStefan Haberland if (rc == 0) { 51715a3b7b11SStefan Haberland *data = *host_access; 51725a3b7b11SStefan Haberland } else { 51735a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 51745a3b7b11SStefan Haberland "Reading host access data failed with rc=%d\n", 51755a3b7b11SStefan Haberland rc); 51765a3b7b11SStefan Haberland rc = -EOPNOTSUPP; 51775a3b7b11SStefan Haberland } 51785a3b7b11SStefan Haberland 51795a3b7b11SStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 51805a3b7b11SStefan Haberland kfree(host_access); 51815a3b7b11SStefan Haberland return rc; 51825a3b7b11SStefan Haberland } 51835a3b7b11SStefan Haberland /* 51845a3b7b11SStefan Haberland * return number of grouped devices 51855a3b7b11SStefan Haberland */ 51865a3b7b11SStefan Haberland static int dasd_eckd_host_access_count(struct dasd_device *device) 51875a3b7b11SStefan Haberland { 51885a3b7b11SStefan Haberland struct dasd_psf_query_host_access *access; 51895a3b7b11SStefan Haberland struct dasd_ckd_path_group_entry *entry; 51905a3b7b11SStefan Haberland struct dasd_ckd_host_information *info; 51915a3b7b11SStefan Haberland int count = 0; 51925a3b7b11SStefan Haberland int rc, i; 51935a3b7b11SStefan Haberland 51945a3b7b11SStefan Haberland access = kzalloc(sizeof(*access), GFP_NOIO); 51955a3b7b11SStefan Haberland if (!access) { 51965a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 51975a3b7b11SStefan Haberland "Could not allocate access buffer"); 51985a3b7b11SStefan Haberland return -ENOMEM; 51995a3b7b11SStefan Haberland } 52005a3b7b11SStefan Haberland rc = dasd_eckd_query_host_access(device, access); 52015a3b7b11SStefan Haberland if (rc) { 52025a3b7b11SStefan Haberland kfree(access); 52035a3b7b11SStefan Haberland return rc; 52045a3b7b11SStefan Haberland } 52055a3b7b11SStefan Haberland 52065a3b7b11SStefan Haberland info = (struct dasd_ckd_host_information *) 52075a3b7b11SStefan Haberland access->host_access_information; 52085a3b7b11SStefan Haberland for (i = 0; i < info->entry_count; i++) { 52095a3b7b11SStefan Haberland entry = (struct dasd_ckd_path_group_entry *) 52105a3b7b11SStefan Haberland (info->entry + i * info->entry_size); 52115a3b7b11SStefan Haberland if (entry->status_flags & DASD_ECKD_PG_GROUPED) 52125a3b7b11SStefan Haberland count++; 52135a3b7b11SStefan Haberland } 52145a3b7b11SStefan Haberland 52155a3b7b11SStefan Haberland kfree(access); 52165a3b7b11SStefan Haberland return count; 52175a3b7b11SStefan Haberland } 52185a3b7b11SStefan Haberland 52195a3b7b11SStefan Haberland /* 52205a3b7b11SStefan Haberland * write host access information to a sequential file 52215a3b7b11SStefan Haberland */ 52225a3b7b11SStefan Haberland static int dasd_hosts_print(struct dasd_device *device, struct seq_file *m) 52235a3b7b11SStefan Haberland { 52245a3b7b11SStefan Haberland struct dasd_psf_query_host_access *access; 52255a3b7b11SStefan Haberland struct dasd_ckd_path_group_entry *entry; 52265a3b7b11SStefan Haberland struct dasd_ckd_host_information *info; 52275a3b7b11SStefan Haberland char sysplex[9] = ""; 52285a3b7b11SStefan Haberland int rc, i, j; 52295a3b7b11SStefan Haberland 52305a3b7b11SStefan Haberland access = kzalloc(sizeof(*access), GFP_NOIO); 52315a3b7b11SStefan Haberland if (!access) { 52325a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 52335a3b7b11SStefan Haberland "Could not allocate access buffer"); 52345a3b7b11SStefan Haberland return -ENOMEM; 52355a3b7b11SStefan Haberland } 52365a3b7b11SStefan Haberland rc = dasd_eckd_query_host_access(device, access); 52375a3b7b11SStefan Haberland if (rc) { 52385a3b7b11SStefan Haberland kfree(access); 52395a3b7b11SStefan Haberland return rc; 52405a3b7b11SStefan Haberland } 52415a3b7b11SStefan Haberland 52425a3b7b11SStefan Haberland info = (struct dasd_ckd_host_information *) 52435a3b7b11SStefan Haberland access->host_access_information; 52445a3b7b11SStefan Haberland for (i = 0; i < info->entry_count; i++) { 52455a3b7b11SStefan Haberland entry = (struct dasd_ckd_path_group_entry *) 52465a3b7b11SStefan Haberland (info->entry + i * info->entry_size); 52475a3b7b11SStefan Haberland /* PGID */ 52485a3b7b11SStefan Haberland seq_puts(m, "pgid "); 52495a3b7b11SStefan Haberland for (j = 0; j < 11; j++) 52505a3b7b11SStefan Haberland seq_printf(m, "%02x", entry->pgid[j]); 52515a3b7b11SStefan Haberland seq_putc(m, '\n'); 52525a3b7b11SStefan Haberland /* FLAGS */ 52535a3b7b11SStefan Haberland seq_printf(m, "status_flags %02x\n", entry->status_flags); 52545a3b7b11SStefan Haberland /* SYSPLEX NAME */ 52555a3b7b11SStefan Haberland memcpy(&sysplex, &entry->sysplex_name, sizeof(sysplex) - 1); 52565a3b7b11SStefan Haberland EBCASC(sysplex, sizeof(sysplex)); 52575a3b7b11SStefan Haberland seq_printf(m, "sysplex_name %8s\n", sysplex); 52585a3b7b11SStefan Haberland /* SUPPORTED CYLINDER */ 52595a3b7b11SStefan Haberland seq_printf(m, "supported_cylinder %d\n", entry->cylinder); 52605a3b7b11SStefan Haberland /* TIMESTAMP */ 52615a3b7b11SStefan Haberland seq_printf(m, "timestamp %lu\n", (unsigned long) 52625a3b7b11SStefan Haberland entry->timestamp); 52635a3b7b11SStefan Haberland } 52645a3b7b11SStefan Haberland kfree(access); 52655a3b7b11SStefan Haberland 52665a3b7b11SStefan Haberland return 0; 52675a3b7b11SStefan Haberland } 52685a3b7b11SStefan Haberland 52695db8440cSStefan Haberland /* 52705db8440cSStefan Haberland * Perform Subsystem Function - CUIR response 52715db8440cSStefan Haberland */ 52725db8440cSStefan Haberland static int 52735db8440cSStefan Haberland dasd_eckd_psf_cuir_response(struct dasd_device *device, int response, 5274a521b048SStefan Haberland __u32 message_id, __u8 lpum) 52755db8440cSStefan Haberland { 52765db8440cSStefan Haberland struct dasd_psf_cuir_response *psf_cuir; 5277a521b048SStefan Haberland int pos = pathmask_to_pos(lpum); 52785db8440cSStefan Haberland struct dasd_ccw_req *cqr; 52795db8440cSStefan Haberland struct ccw1 *ccw; 52805db8440cSStefan Haberland int rc; 52815db8440cSStefan Haberland 52825db8440cSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 52835db8440cSStefan Haberland sizeof(struct dasd_psf_cuir_response), 52845db8440cSStefan Haberland device); 52855db8440cSStefan Haberland 52865db8440cSStefan Haberland if (IS_ERR(cqr)) { 52875db8440cSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 52885db8440cSStefan Haberland "Could not allocate PSF-CUIR request"); 52895db8440cSStefan Haberland return PTR_ERR(cqr); 52905db8440cSStefan Haberland } 52915db8440cSStefan Haberland 52925db8440cSStefan Haberland psf_cuir = (struct dasd_psf_cuir_response *)cqr->data; 52935db8440cSStefan Haberland psf_cuir->order = PSF_ORDER_CUIR_RESPONSE; 52945db8440cSStefan Haberland psf_cuir->cc = response; 5295a521b048SStefan Haberland psf_cuir->chpid = device->path[pos].chpid; 52965db8440cSStefan Haberland psf_cuir->message_id = message_id; 5297a521b048SStefan Haberland psf_cuir->cssid = device->path[pos].cssid; 5298a521b048SStefan Haberland psf_cuir->ssid = device->path[pos].ssid; 52995db8440cSStefan Haberland ccw = cqr->cpaddr; 53005db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 53015db8440cSStefan Haberland ccw->cda = (__u32)(addr_t)psf_cuir; 5302b179b037SStefan Haberland ccw->flags = CCW_FLAG_SLI; 53035db8440cSStefan Haberland ccw->count = sizeof(struct dasd_psf_cuir_response); 53045db8440cSStefan Haberland 53055db8440cSStefan Haberland cqr->startdev = device; 53065db8440cSStefan Haberland cqr->memdev = device; 53075db8440cSStefan Haberland cqr->block = NULL; 53085db8440cSStefan Haberland cqr->retries = 256; 53095db8440cSStefan Haberland cqr->expires = 10*HZ; 53105db8440cSStefan Haberland cqr->buildclk = get_tod_clock(); 53115db8440cSStefan Haberland cqr->status = DASD_CQR_FILLED; 5312b179b037SStefan Haberland set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 53135db8440cSStefan Haberland 53145db8440cSStefan Haberland rc = dasd_sleep_on(cqr); 53155db8440cSStefan Haberland 53165db8440cSStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 53175db8440cSStefan Haberland return rc; 53185db8440cSStefan Haberland } 53195db8440cSStefan Haberland 5320b179b037SStefan Haberland /* 5321b179b037SStefan Haberland * return configuration data that is referenced by record selector 5322b179b037SStefan Haberland * if a record selector is specified or per default return the 5323b179b037SStefan Haberland * conf_data pointer for the path specified by lpum 5324b179b037SStefan Haberland */ 5325b179b037SStefan Haberland static struct dasd_conf_data *dasd_eckd_get_ref_conf(struct dasd_device *device, 5326b179b037SStefan Haberland __u8 lpum, 5327b179b037SStefan Haberland struct dasd_cuir_message *cuir) 53285db8440cSStefan Haberland { 5329b179b037SStefan Haberland struct dasd_conf_data *conf_data; 5330b179b037SStefan Haberland int path, pos; 53315db8440cSStefan Haberland 5332b179b037SStefan Haberland if (cuir->record_selector == 0) 5333b179b037SStefan Haberland goto out; 5334b179b037SStefan Haberland for (path = 0x80, pos = 0; path; path >>= 1, pos++) { 5335c9346151SStefan Haberland conf_data = device->path[pos].conf_data; 5336b179b037SStefan Haberland if (conf_data->gneq.record_selector == 5337b179b037SStefan Haberland cuir->record_selector) 5338b179b037SStefan Haberland return conf_data; 53395db8440cSStefan Haberland } 5340b179b037SStefan Haberland out: 5341c9346151SStefan Haberland return device->path[pathmask_to_pos(lpum)].conf_data; 53425db8440cSStefan Haberland } 53435db8440cSStefan Haberland 53445db8440cSStefan Haberland /* 5345b179b037SStefan Haberland * This function determines the scope of a reconfiguration request by 5346b179b037SStefan Haberland * analysing the path and device selection data provided in the CUIR request. 5347b179b037SStefan Haberland * Returns a path mask containing CUIR affected paths for the give device. 5348b179b037SStefan Haberland * 5349b179b037SStefan Haberland * If the CUIR request does not contain the required information return the 5350b179b037SStefan Haberland * path mask of the path the attention message for the CUIR request was reveived 5351b179b037SStefan Haberland * on. 5352b179b037SStefan Haberland */ 5353b179b037SStefan Haberland static int dasd_eckd_cuir_scope(struct dasd_device *device, __u8 lpum, 5354b179b037SStefan Haberland struct dasd_cuir_message *cuir) 5355b179b037SStefan Haberland { 5356b179b037SStefan Haberland struct dasd_conf_data *ref_conf_data; 5357b179b037SStefan Haberland unsigned long bitmask = 0, mask = 0; 5358b179b037SStefan Haberland struct dasd_conf_data *conf_data; 5359b179b037SStefan Haberland unsigned int pos, path; 5360b179b037SStefan Haberland char *ref_gneq, *gneq; 5361b179b037SStefan Haberland char *ref_ned, *ned; 5362b179b037SStefan Haberland int tbcpm = 0; 5363b179b037SStefan Haberland 5364b179b037SStefan Haberland /* if CUIR request does not specify the scope use the path 5365b179b037SStefan Haberland the attention message was presented on */ 5366b179b037SStefan Haberland if (!cuir->ned_map || 5367b179b037SStefan Haberland !(cuir->neq_map[0] | cuir->neq_map[1] | cuir->neq_map[2])) 5368b179b037SStefan Haberland return lpum; 5369b179b037SStefan Haberland 5370b179b037SStefan Haberland /* get reference conf data */ 5371b179b037SStefan Haberland ref_conf_data = dasd_eckd_get_ref_conf(device, lpum, cuir); 5372b179b037SStefan Haberland /* reference ned is determined by ned_map field */ 5373b179b037SStefan Haberland pos = 8 - ffs(cuir->ned_map); 5374b179b037SStefan Haberland ref_ned = (char *)&ref_conf_data->neds[pos]; 5375b179b037SStefan Haberland ref_gneq = (char *)&ref_conf_data->gneq; 5376b179b037SStefan Haberland /* transfer 24 bit neq_map to mask */ 5377b179b037SStefan Haberland mask = cuir->neq_map[2]; 5378b179b037SStefan Haberland mask |= cuir->neq_map[1] << 8; 5379b179b037SStefan Haberland mask |= cuir->neq_map[0] << 16; 5380b179b037SStefan Haberland 5381c9346151SStefan Haberland for (path = 0; path < 8; path++) { 5382b179b037SStefan Haberland /* initialise data per path */ 5383b179b037SStefan Haberland bitmask = mask; 5384c9346151SStefan Haberland conf_data = device->path[path].conf_data; 5385b179b037SStefan Haberland pos = 8 - ffs(cuir->ned_map); 5386b179b037SStefan Haberland ned = (char *) &conf_data->neds[pos]; 5387b179b037SStefan Haberland /* compare reference ned and per path ned */ 5388b179b037SStefan Haberland if (memcmp(ref_ned, ned, sizeof(*ned)) != 0) 5389b179b037SStefan Haberland continue; 5390b179b037SStefan Haberland gneq = (char *)&conf_data->gneq; 5391b179b037SStefan Haberland /* compare reference gneq and per_path gneq under 5392b179b037SStefan Haberland 24 bit mask where mask bit 0 equals byte 7 of 5393b179b037SStefan Haberland the gneq and mask bit 24 equals byte 31 */ 5394b179b037SStefan Haberland while (bitmask) { 5395b179b037SStefan Haberland pos = ffs(bitmask) - 1; 5396b179b037SStefan Haberland if (memcmp(&ref_gneq[31 - pos], &gneq[31 - pos], 1) 5397b179b037SStefan Haberland != 0) 5398b179b037SStefan Haberland break; 5399b179b037SStefan Haberland clear_bit(pos, &bitmask); 5400b179b037SStefan Haberland } 5401b179b037SStefan Haberland if (bitmask) 5402b179b037SStefan Haberland continue; 5403b179b037SStefan Haberland /* device and path match the reference values 5404b179b037SStefan Haberland add path to CUIR scope */ 5405c9346151SStefan Haberland tbcpm |= 0x80 >> path; 5406b179b037SStefan Haberland } 5407b179b037SStefan Haberland return tbcpm; 5408b179b037SStefan Haberland } 5409b179b037SStefan Haberland 5410b179b037SStefan Haberland static void dasd_eckd_cuir_notify_user(struct dasd_device *device, 5411a521b048SStefan Haberland unsigned long paths, int action) 5412b179b037SStefan Haberland { 5413b179b037SStefan Haberland int pos; 5414b179b037SStefan Haberland 5415b179b037SStefan Haberland while (paths) { 5416b179b037SStefan Haberland /* get position of bit in mask */ 5417a521b048SStefan Haberland pos = 8 - ffs(paths); 5418b179b037SStefan Haberland /* get channel path descriptor from this position */ 5419b179b037SStefan Haberland if (action == CUIR_QUIESCE) 5420a521b048SStefan Haberland pr_warn("Service on the storage server caused path %x.%02x to go offline", 5421a521b048SStefan Haberland device->path[pos].cssid, 5422a521b048SStefan Haberland device->path[pos].chpid); 5423b179b037SStefan Haberland else if (action == CUIR_RESUME) 5424a521b048SStefan Haberland pr_info("Path %x.%02x is back online after service on the storage server", 5425a521b048SStefan Haberland device->path[pos].cssid, 5426a521b048SStefan Haberland device->path[pos].chpid); 5427a521b048SStefan Haberland clear_bit(7 - pos, &paths); 5428b179b037SStefan Haberland } 5429b179b037SStefan Haberland } 5430b179b037SStefan Haberland 5431b179b037SStefan Haberland static int dasd_eckd_cuir_remove_path(struct dasd_device *device, __u8 lpum, 5432b179b037SStefan Haberland struct dasd_cuir_message *cuir) 5433b179b037SStefan Haberland { 5434b179b037SStefan Haberland unsigned long tbcpm; 5435b179b037SStefan Haberland 5436b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(device, lpum, cuir); 5437b179b037SStefan Haberland /* nothing to do if path is not in use */ 5438c9346151SStefan Haberland if (!(dasd_path_get_opm(device) & tbcpm)) 5439b179b037SStefan Haberland return 0; 5440c9346151SStefan Haberland if (!(dasd_path_get_opm(device) & ~tbcpm)) { 5441b179b037SStefan Haberland /* no path would be left if the CUIR action is taken 5442b179b037SStefan Haberland return error */ 5443b179b037SStefan Haberland return -EINVAL; 5444b179b037SStefan Haberland } 5445b179b037SStefan Haberland /* remove device from operational path mask */ 5446c9346151SStefan Haberland dasd_path_remove_opm(device, tbcpm); 5447c9346151SStefan Haberland dasd_path_add_cuirpm(device, tbcpm); 5448b179b037SStefan Haberland return tbcpm; 5449b179b037SStefan Haberland } 5450b179b037SStefan Haberland 5451b179b037SStefan Haberland /* 5452b179b037SStefan Haberland * walk through all devices and build a path mask to quiesce them 5453b179b037SStefan Haberland * return an error if the last path to a device would be removed 54545db8440cSStefan Haberland * 54555db8440cSStefan Haberland * if only part of the devices are quiesced and an error 54565db8440cSStefan Haberland * occurs no onlining necessary, the storage server will 54575db8440cSStefan Haberland * notify the already set offline devices again 54585db8440cSStefan Haberland */ 54595db8440cSStefan Haberland static int dasd_eckd_cuir_quiesce(struct dasd_device *device, __u8 lpum, 5460b179b037SStefan Haberland struct dasd_cuir_message *cuir) 54615db8440cSStefan Haberland { 5462543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 54635db8440cSStefan Haberland struct alias_pav_group *pavgroup, *tempgroup; 54645db8440cSStefan Haberland struct dasd_device *dev, *n; 5465b179b037SStefan Haberland unsigned long paths = 0; 5466b179b037SStefan Haberland unsigned long flags; 5467b179b037SStefan Haberland int tbcpm; 54685db8440cSStefan Haberland 54695db8440cSStefan Haberland /* active devices */ 5470b179b037SStefan Haberland list_for_each_entry_safe(dev, n, &private->lcu->active_devices, 54715db8440cSStefan Haberland alias_list) { 5472b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 5473b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 5474b179b037SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); 5475b179b037SStefan Haberland if (tbcpm < 0) 5476b179b037SStefan Haberland goto out_err; 5477b179b037SStefan Haberland paths |= tbcpm; 54785db8440cSStefan Haberland } 54795db8440cSStefan Haberland /* inactive devices */ 5480b179b037SStefan Haberland list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices, 54815db8440cSStefan Haberland alias_list) { 5482b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 5483b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 5484b179b037SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); 5485b179b037SStefan Haberland if (tbcpm < 0) 5486b179b037SStefan Haberland goto out_err; 5487b179b037SStefan Haberland paths |= tbcpm; 54885db8440cSStefan Haberland } 54895db8440cSStefan Haberland /* devices in PAV groups */ 54905db8440cSStefan Haberland list_for_each_entry_safe(pavgroup, tempgroup, 54915db8440cSStefan Haberland &private->lcu->grouplist, group) { 54925db8440cSStefan Haberland list_for_each_entry_safe(dev, n, &pavgroup->baselist, 54935db8440cSStefan Haberland alias_list) { 5494b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 5495b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 5496b179b037SStefan Haberland spin_unlock_irqrestore( 5497b179b037SStefan Haberland get_ccwdev_lock(dev->cdev), flags); 5498b179b037SStefan Haberland if (tbcpm < 0) 5499b179b037SStefan Haberland goto out_err; 5500b179b037SStefan Haberland paths |= tbcpm; 55015db8440cSStefan Haberland } 55025db8440cSStefan Haberland list_for_each_entry_safe(dev, n, &pavgroup->aliaslist, 55035db8440cSStefan Haberland alias_list) { 5504b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 5505b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 5506b179b037SStefan Haberland spin_unlock_irqrestore( 5507b179b037SStefan Haberland get_ccwdev_lock(dev->cdev), flags); 5508b179b037SStefan Haberland if (tbcpm < 0) 5509b179b037SStefan Haberland goto out_err; 5510b179b037SStefan Haberland paths |= tbcpm; 55115db8440cSStefan Haberland } 55125db8440cSStefan Haberland } 5513b179b037SStefan Haberland /* notify user about all paths affected by CUIR action */ 5514a521b048SStefan Haberland dasd_eckd_cuir_notify_user(device, paths, CUIR_QUIESCE); 5515b179b037SStefan Haberland return 0; 5516b179b037SStefan Haberland out_err: 5517b179b037SStefan Haberland return tbcpm; 55185db8440cSStefan Haberland } 55195db8440cSStefan Haberland 55205db8440cSStefan Haberland static int dasd_eckd_cuir_resume(struct dasd_device *device, __u8 lpum, 5521b179b037SStefan Haberland struct dasd_cuir_message *cuir) 55225db8440cSStefan Haberland { 5523543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 55245db8440cSStefan Haberland struct alias_pav_group *pavgroup, *tempgroup; 55255db8440cSStefan Haberland struct dasd_device *dev, *n; 5526b179b037SStefan Haberland unsigned long paths = 0; 5527b179b037SStefan Haberland int tbcpm; 55285db8440cSStefan Haberland 55295db8440cSStefan Haberland /* 55305db8440cSStefan Haberland * the path may have been added through a generic path event before 55315db8440cSStefan Haberland * only trigger path verification if the path is not already in use 55325db8440cSStefan Haberland */ 55335db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 55345db8440cSStefan Haberland &private->lcu->active_devices, 55355db8440cSStefan Haberland alias_list) { 5536b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 5537b179b037SStefan Haberland paths |= tbcpm; 5538c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 5539c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 55405db8440cSStefan Haberland dasd_schedule_device_bh(dev); 55415db8440cSStefan Haberland } 55425db8440cSStefan Haberland } 55435db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 55445db8440cSStefan Haberland &private->lcu->inactive_devices, 55455db8440cSStefan Haberland alias_list) { 5546b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 5547b179b037SStefan Haberland paths |= tbcpm; 5548c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 5549c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 55505db8440cSStefan Haberland dasd_schedule_device_bh(dev); 55515db8440cSStefan Haberland } 55525db8440cSStefan Haberland } 55535db8440cSStefan Haberland /* devices in PAV groups */ 55545db8440cSStefan Haberland list_for_each_entry_safe(pavgroup, tempgroup, 55555db8440cSStefan Haberland &private->lcu->grouplist, 55565db8440cSStefan Haberland group) { 55575db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 55585db8440cSStefan Haberland &pavgroup->baselist, 55595db8440cSStefan Haberland alias_list) { 5560b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 5561b179b037SStefan Haberland paths |= tbcpm; 5562c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 5563c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 55645db8440cSStefan Haberland dasd_schedule_device_bh(dev); 55655db8440cSStefan Haberland } 55665db8440cSStefan Haberland } 55675db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 55685db8440cSStefan Haberland &pavgroup->aliaslist, 55695db8440cSStefan Haberland alias_list) { 5570b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 5571b179b037SStefan Haberland paths |= tbcpm; 5572c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 5573c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 55745db8440cSStefan Haberland dasd_schedule_device_bh(dev); 55755db8440cSStefan Haberland } 55765db8440cSStefan Haberland } 55775db8440cSStefan Haberland } 5578b179b037SStefan Haberland /* notify user about all paths affected by CUIR action */ 5579a521b048SStefan Haberland dasd_eckd_cuir_notify_user(device, paths, CUIR_RESUME); 5580b179b037SStefan Haberland return 0; 55815db8440cSStefan Haberland } 55825db8440cSStefan Haberland 55835db8440cSStefan Haberland static void dasd_eckd_handle_cuir(struct dasd_device *device, void *messages, 55845db8440cSStefan Haberland __u8 lpum) 55855db8440cSStefan Haberland { 55865db8440cSStefan Haberland struct dasd_cuir_message *cuir = messages; 5587a521b048SStefan Haberland int response; 55885db8440cSStefan Haberland 5589b179b037SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, 5590b179b037SStefan Haberland "CUIR request: %016llx %016llx %016llx %08x", 5591b179b037SStefan Haberland ((u64 *)cuir)[0], ((u64 *)cuir)[1], ((u64 *)cuir)[2], 5592b179b037SStefan Haberland ((u32 *)cuir)[3]); 55935db8440cSStefan Haberland 55945db8440cSStefan Haberland if (cuir->code == CUIR_QUIESCE) { 55955db8440cSStefan Haberland /* quiesce */ 5596a521b048SStefan Haberland if (dasd_eckd_cuir_quiesce(device, lpum, cuir)) 5597b179b037SStefan Haberland response = PSF_CUIR_LAST_PATH; 5598b179b037SStefan Haberland else 5599b179b037SStefan Haberland response = PSF_CUIR_COMPLETED; 56005db8440cSStefan Haberland } else if (cuir->code == CUIR_RESUME) { 56015db8440cSStefan Haberland /* resume */ 5602a521b048SStefan Haberland dasd_eckd_cuir_resume(device, lpum, cuir); 5603b179b037SStefan Haberland response = PSF_CUIR_COMPLETED; 56045db8440cSStefan Haberland } else 56055db8440cSStefan Haberland response = PSF_CUIR_NOT_SUPPORTED; 56065db8440cSStefan Haberland 5607b179b037SStefan Haberland dasd_eckd_psf_cuir_response(device, response, 5608a521b048SStefan Haberland cuir->message_id, lpum); 5609b179b037SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, 5610b179b037SStefan Haberland "CUIR response: %d on message ID %08x", response, 5611b179b037SStefan Haberland cuir->message_id); 5612b179b037SStefan Haberland /* to make sure there is no attention left schedule work again */ 5613b179b037SStefan Haberland device->discipline->check_attention(device, lpum); 56145db8440cSStefan Haberland } 56155db8440cSStefan Haberland 56165db8440cSStefan Haberland static void dasd_eckd_check_attention_work(struct work_struct *work) 56175db8440cSStefan Haberland { 56185db8440cSStefan Haberland struct check_attention_work_data *data; 56195db8440cSStefan Haberland struct dasd_rssd_messages *messages; 56205db8440cSStefan Haberland struct dasd_device *device; 56215db8440cSStefan Haberland int rc; 56225db8440cSStefan Haberland 56235db8440cSStefan Haberland data = container_of(work, struct check_attention_work_data, worker); 56245db8440cSStefan Haberland device = data->device; 56255db8440cSStefan Haberland messages = kzalloc(sizeof(*messages), GFP_KERNEL); 56265db8440cSStefan Haberland if (!messages) { 56275db8440cSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 56285db8440cSStefan Haberland "Could not allocate attention message buffer"); 56295db8440cSStefan Haberland goto out; 56305db8440cSStefan Haberland } 56315db8440cSStefan Haberland rc = dasd_eckd_read_message_buffer(device, messages, data->lpum); 56325db8440cSStefan Haberland if (rc) 56335db8440cSStefan Haberland goto out; 56345db8440cSStefan Haberland if (messages->length == ATTENTION_LENGTH_CUIR && 56355db8440cSStefan Haberland messages->format == ATTENTION_FORMAT_CUIR) 56365db8440cSStefan Haberland dasd_eckd_handle_cuir(device, messages, data->lpum); 56375db8440cSStefan Haberland out: 56385db8440cSStefan Haberland dasd_put_device(device); 56395db8440cSStefan Haberland kfree(messages); 56405db8440cSStefan Haberland kfree(data); 56415db8440cSStefan Haberland } 56425db8440cSStefan Haberland 56435db8440cSStefan Haberland static int dasd_eckd_check_attention(struct dasd_device *device, __u8 lpum) 56445db8440cSStefan Haberland { 56455db8440cSStefan Haberland struct check_attention_work_data *data; 56465db8440cSStefan Haberland 56475db8440cSStefan Haberland data = kzalloc(sizeof(*data), GFP_ATOMIC); 56485db8440cSStefan Haberland if (!data) 56495db8440cSStefan Haberland return -ENOMEM; 56505db8440cSStefan Haberland INIT_WORK(&data->worker, dasd_eckd_check_attention_work); 56515db8440cSStefan Haberland dasd_get_device(device); 56525db8440cSStefan Haberland data->device = device; 56535db8440cSStefan Haberland data->lpum = lpum; 56545db8440cSStefan Haberland schedule_work(&data->worker); 56555db8440cSStefan Haberland return 0; 56565db8440cSStefan Haberland } 56575db8440cSStefan Haberland 5658a521b048SStefan Haberland static int dasd_eckd_disable_hpf_path(struct dasd_device *device, __u8 lpum) 5659a521b048SStefan Haberland { 5660a521b048SStefan Haberland if (~lpum & dasd_path_get_opm(device)) { 5661a521b048SStefan Haberland dasd_path_add_nohpfpm(device, lpum); 5662a521b048SStefan Haberland dasd_path_remove_opm(device, lpum); 5663a521b048SStefan Haberland dev_err(&device->cdev->dev, 5664a521b048SStefan Haberland "Channel path %02X lost HPF functionality and is disabled\n", 5665a521b048SStefan Haberland lpum); 5666a521b048SStefan Haberland return 1; 5667a521b048SStefan Haberland } 5668a521b048SStefan Haberland return 0; 5669a521b048SStefan Haberland } 5670a521b048SStefan Haberland 5671a521b048SStefan Haberland static void dasd_eckd_disable_hpf_device(struct dasd_device *device) 5672a521b048SStefan Haberland { 5673a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 5674a521b048SStefan Haberland 5675a521b048SStefan Haberland dev_err(&device->cdev->dev, 5676a521b048SStefan Haberland "High Performance FICON disabled\n"); 5677a521b048SStefan Haberland private->fcx_max_data = 0; 5678a521b048SStefan Haberland } 5679a521b048SStefan Haberland 5680a521b048SStefan Haberland static int dasd_eckd_hpf_enabled(struct dasd_device *device) 5681a521b048SStefan Haberland { 5682a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 5683a521b048SStefan Haberland 5684a521b048SStefan Haberland return private->fcx_max_data ? 1 : 0; 5685a521b048SStefan Haberland } 5686a521b048SStefan Haberland 5687a521b048SStefan Haberland static void dasd_eckd_handle_hpf_error(struct dasd_device *device, 5688a521b048SStefan Haberland struct irb *irb) 5689a521b048SStefan Haberland { 5690a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 5691a521b048SStefan Haberland 5692a521b048SStefan Haberland if (!private->fcx_max_data) { 5693a521b048SStefan Haberland /* sanity check for no HPF, the error makes no sense */ 5694a521b048SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 5695a521b048SStefan Haberland "Trying to disable HPF for a non HPF device"); 5696a521b048SStefan Haberland return; 5697a521b048SStefan Haberland } 5698a521b048SStefan Haberland if (irb->scsw.tm.sesq == SCSW_SESQ_DEV_NOFCX) { 5699a521b048SStefan Haberland dasd_eckd_disable_hpf_device(device); 5700a521b048SStefan Haberland } else if (irb->scsw.tm.sesq == SCSW_SESQ_PATH_NOFCX) { 5701a521b048SStefan Haberland if (dasd_eckd_disable_hpf_path(device, irb->esw.esw1.lpum)) 5702a521b048SStefan Haberland return; 5703a521b048SStefan Haberland dasd_eckd_disable_hpf_device(device); 5704a521b048SStefan Haberland dasd_path_set_tbvpm(device, 5705a521b048SStefan Haberland dasd_path_get_hpfpm(device)); 5706a521b048SStefan Haberland } 5707a521b048SStefan Haberland /* 5708a521b048SStefan Haberland * prevent that any new I/O ist started on the device and schedule a 5709a521b048SStefan Haberland * requeue of existing requests 5710a521b048SStefan Haberland */ 5711a521b048SStefan Haberland dasd_device_set_stop_bits(device, DASD_STOPPED_NOT_ACC); 5712a521b048SStefan Haberland dasd_schedule_requeue(device); 5713a521b048SStefan Haberland } 5714a521b048SStefan Haberland 5715d41dd122SStefan Haberland static struct ccw_driver dasd_eckd_driver = { 57163bda058bSSebastian Ott .driver = { 5717d41dd122SStefan Haberland .name = "dasd-eckd", 5718d41dd122SStefan Haberland .owner = THIS_MODULE, 57193bda058bSSebastian Ott }, 5720d41dd122SStefan Haberland .ids = dasd_eckd_ids, 5721d41dd122SStefan Haberland .probe = dasd_eckd_probe, 5722d41dd122SStefan Haberland .remove = dasd_generic_remove, 5723d41dd122SStefan Haberland .set_offline = dasd_generic_set_offline, 5724d41dd122SStefan Haberland .set_online = dasd_eckd_set_online, 5725d41dd122SStefan Haberland .notify = dasd_generic_notify, 5726a4d26c6aSStefan Weinhuber .path_event = dasd_generic_path_event, 57274679e893SStefan Haberland .shutdown = dasd_generic_shutdown, 5728d41dd122SStefan Haberland .freeze = dasd_generic_pm_freeze, 5729d41dd122SStefan Haberland .thaw = dasd_generic_restore_device, 5730d41dd122SStefan Haberland .restore = dasd_generic_restore_device, 5731a23ed009SStefan Haberland .uc_handler = dasd_generic_uc_handler, 5732420f42ecSHeiko Carstens .int_class = IRQIO_DAS, 5733d41dd122SStefan Haberland }; 5734f3eb5384SStefan Weinhuber 57351da177e4SLinus Torvalds /* 57361da177e4SLinus Torvalds * max_blocks is dependent on the amount of storage that is available 57371da177e4SLinus Torvalds * in the static io buffer for each device. Currently each device has 57381da177e4SLinus Torvalds * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has 57391da177e4SLinus Torvalds * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use 57401da177e4SLinus Torvalds * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In 57411da177e4SLinus Torvalds * addition we have one define extent ccw + 16 bytes of data and one 57421da177e4SLinus Torvalds * locate record ccw + 16 bytes of data. That makes: 57431da177e4SLinus Torvalds * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. 57441da177e4SLinus Torvalds * We want to fit two into the available memory so that we can immediately 57451da177e4SLinus Torvalds * start the next request if one finishes off. That makes 249.5 blocks 57461da177e4SLinus Torvalds * for one request. Give a little safety and the result is 240. 57471da177e4SLinus Torvalds */ 57481da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline = { 57491da177e4SLinus Torvalds .owner = THIS_MODULE, 57501da177e4SLinus Torvalds .name = "ECKD", 57511da177e4SLinus Torvalds .ebcname = "ECKD", 5752ef19298bSStefan Weinhuber .max_blocks = 190, 57531da177e4SLinus Torvalds .check_device = dasd_eckd_check_characteristics, 57548e09f215SStefan Weinhuber .uncheck_device = dasd_eckd_uncheck_device, 57551da177e4SLinus Torvalds .do_analysis = dasd_eckd_do_analysis, 5756a4d26c6aSStefan Weinhuber .verify_path = dasd_eckd_verify_path, 5757d42e1712SStefan Haberland .basic_to_ready = dasd_eckd_basic_to_ready, 57588e09f215SStefan Weinhuber .online_to_ready = dasd_eckd_online_to_ready, 5759daa991bfSStefan Haberland .basic_to_known = dasd_eckd_basic_to_known, 57601da177e4SLinus Torvalds .fill_geometry = dasd_eckd_fill_geometry, 57611da177e4SLinus Torvalds .start_IO = dasd_start_IO, 57621da177e4SLinus Torvalds .term_IO = dasd_term_IO, 57638e09f215SStefan Weinhuber .handle_terminated_request = dasd_eckd_handle_terminated_request, 57641da177e4SLinus Torvalds .format_device = dasd_eckd_format_device, 57658fd57520SJan Höppner .check_device_format = dasd_eckd_check_device_format, 57661da177e4SLinus Torvalds .erp_action = dasd_eckd_erp_action, 57671da177e4SLinus Torvalds .erp_postaction = dasd_eckd_erp_postaction, 57685a27e60dSStefan Weinhuber .check_for_device_change = dasd_eckd_check_for_device_change, 57698e09f215SStefan Weinhuber .build_cp = dasd_eckd_build_alias_cp, 57708e09f215SStefan Weinhuber .free_cp = dasd_eckd_free_alias_cp, 57711da177e4SLinus Torvalds .dump_sense = dasd_eckd_dump_sense, 5772fc19f381SStefan Haberland .dump_sense_dbf = dasd_eckd_dump_sense_dbf, 57731da177e4SLinus Torvalds .fill_info = dasd_eckd_fill_info, 57741107ccfbSChristoph Hellwig .ioctl = dasd_eckd_ioctl, 5775d41dd122SStefan Haberland .freeze = dasd_eckd_pm_freeze, 5776d41dd122SStefan Haberland .restore = dasd_eckd_restore_device, 5777501183f2SStefan Haberland .reload = dasd_eckd_reload_device, 57782dedf0d9SStefan Haberland .get_uid = dasd_eckd_get_uid, 5779f1633031SStefan Haberland .kick_validate = dasd_eckd_kick_validate_server, 57805db8440cSStefan Haberland .check_attention = dasd_eckd_check_attention, 57815a3b7b11SStefan Haberland .host_access_count = dasd_eckd_host_access_count, 57825a3b7b11SStefan Haberland .hosts_print = dasd_hosts_print, 5783a521b048SStefan Haberland .handle_hpf_error = dasd_eckd_handle_hpf_error, 5784a521b048SStefan Haberland .disable_hpf = dasd_eckd_disable_hpf_device, 5785a521b048SStefan Haberland .hpf_enabled = dasd_eckd_hpf_enabled, 5786a521b048SStefan Haberland .reset_path = dasd_eckd_reset_path, 57871da177e4SLinus Torvalds }; 57881da177e4SLinus Torvalds 57891da177e4SLinus Torvalds static int __init 57901da177e4SLinus Torvalds dasd_eckd_init(void) 57911da177e4SLinus Torvalds { 5792736e6ea0SSebastian Ott int ret; 5793736e6ea0SSebastian Ott 57941da177e4SLinus Torvalds ASCEBC(dasd_eckd_discipline.ebcname, 4); 5795f932bceaSStefan Weinhuber dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), 5796f932bceaSStefan Weinhuber GFP_KERNEL | GFP_DMA); 5797f932bceaSStefan Weinhuber if (!dasd_reserve_req) 5798f932bceaSStefan Weinhuber return -ENOMEM; 5799a4d26c6aSStefan Weinhuber path_verification_worker = kmalloc(sizeof(*path_verification_worker), 5800a4d26c6aSStefan Weinhuber GFP_KERNEL | GFP_DMA); 5801a4d26c6aSStefan Weinhuber if (!path_verification_worker) { 5802a4d26c6aSStefan Weinhuber kfree(dasd_reserve_req); 5803a4d26c6aSStefan Weinhuber return -ENOMEM; 5804a4d26c6aSStefan Weinhuber } 5805558b9ef0SStefan Weinhuber rawpadpage = (void *)__get_free_page(GFP_KERNEL); 5806558b9ef0SStefan Weinhuber if (!rawpadpage) { 5807558b9ef0SStefan Weinhuber kfree(path_verification_worker); 5808558b9ef0SStefan Weinhuber kfree(dasd_reserve_req); 5809558b9ef0SStefan Weinhuber return -ENOMEM; 5810558b9ef0SStefan Weinhuber } 5811736e6ea0SSebastian Ott ret = ccw_driver_register(&dasd_eckd_driver); 5812736e6ea0SSebastian Ott if (!ret) 5813736e6ea0SSebastian Ott wait_for_device_probe(); 5814a4d26c6aSStefan Weinhuber else { 5815a4d26c6aSStefan Weinhuber kfree(path_verification_worker); 5816f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 5817558b9ef0SStefan Weinhuber free_page((unsigned long)rawpadpage); 5818a4d26c6aSStefan Weinhuber } 5819736e6ea0SSebastian Ott return ret; 58201da177e4SLinus Torvalds } 58211da177e4SLinus Torvalds 58221da177e4SLinus Torvalds static void __exit 58231da177e4SLinus Torvalds dasd_eckd_cleanup(void) 58241da177e4SLinus Torvalds { 58251da177e4SLinus Torvalds ccw_driver_unregister(&dasd_eckd_driver); 5826a4d26c6aSStefan Weinhuber kfree(path_verification_worker); 5827f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 5828558b9ef0SStefan Weinhuber free_page((unsigned long)rawpadpage); 58291da177e4SLinus Torvalds } 58301da177e4SLinus Torvalds 58311da177e4SLinus Torvalds module_init(dasd_eckd_init); 58321da177e4SLinus Torvalds module_exit(dasd_eckd_cleanup); 5833