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> 221da177e4SLinus Torvalds 23382b7366SSebastian Ott #include <asm/css_chars.h> 241da177e4SLinus Torvalds #include <asm/debug.h> 251da177e4SLinus Torvalds #include <asm/idals.h> 261da177e4SLinus Torvalds #include <asm/ebcdic.h> 271da177e4SLinus Torvalds #include <asm/io.h> 281da177e4SLinus Torvalds #include <asm/uaccess.h> 2940545573SHorst Hummel #include <asm/cio.h> 301da177e4SLinus Torvalds #include <asm/ccwdev.h> 31f3eb5384SStefan Weinhuber #include <asm/itcw.h> 325db8440cSStefan Haberland #include <asm/schid.h> 335db8440cSStefan Haberland #include <asm/chpid.h> 341da177e4SLinus Torvalds 351da177e4SLinus Torvalds #include "dasd_int.h" 361da177e4SLinus Torvalds #include "dasd_eckd.h" 371da177e4SLinus Torvalds 381da177e4SLinus Torvalds #ifdef PRINTK_HEADER 391da177e4SLinus Torvalds #undef PRINTK_HEADER 401da177e4SLinus Torvalds #endif /* PRINTK_HEADER */ 411da177e4SLinus Torvalds #define PRINTK_HEADER "dasd(eckd):" 421da177e4SLinus Torvalds 431da177e4SLinus Torvalds #define ECKD_C0(i) (i->home_bytes) 441da177e4SLinus Torvalds #define ECKD_F(i) (i->formula) 451da177e4SLinus Torvalds #define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\ 461da177e4SLinus Torvalds (i->factors.f_0x02.f1)) 471da177e4SLinus Torvalds #define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\ 481da177e4SLinus Torvalds (i->factors.f_0x02.f2)) 491da177e4SLinus Torvalds #define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\ 501da177e4SLinus Torvalds (i->factors.f_0x02.f3)) 511da177e4SLinus Torvalds #define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0) 521da177e4SLinus Torvalds #define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0) 531da177e4SLinus Torvalds #define ECKD_F6(i) (i->factor6) 541da177e4SLinus Torvalds #define ECKD_F7(i) (i->factor7) 551da177e4SLinus Torvalds #define ECKD_F8(i) (i->factor8) 561da177e4SLinus Torvalds 57e4dbb0f2SStefan Haberland /* 58e4dbb0f2SStefan Haberland * raw track access always map to 64k in memory 59e4dbb0f2SStefan Haberland * so it maps to 16 blocks of 4k per track 60e4dbb0f2SStefan Haberland */ 61e4dbb0f2SStefan Haberland #define DASD_RAW_BLOCK_PER_TRACK 16 62e4dbb0f2SStefan Haberland #define DASD_RAW_BLOCKSIZE 4096 63e4dbb0f2SStefan Haberland /* 64k are 128 x 512 byte sectors */ 64e4dbb0f2SStefan Haberland #define DASD_RAW_SECTORS_PER_TRACK 128 65e4dbb0f2SStefan Haberland 661da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 671da177e4SLinus Torvalds 681da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline; 691da177e4SLinus Torvalds 701da177e4SLinus Torvalds /* The ccw bus type uses this table to find devices that it sends to 711da177e4SLinus Torvalds * dasd_eckd_probe */ 721da177e4SLinus Torvalds static struct ccw_device_id dasd_eckd_ids[] = { 73d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1}, 74d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2}, 755da24b76SStefan Haberland { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3380, 0), .driver_info = 0x3}, 76d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4}, 77d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5}, 78d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6}, 79d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7}, 80d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8}, 81d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9}, 82d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa}, 831da177e4SLinus Torvalds { /* end of list */ }, 841da177e4SLinus Torvalds }; 851da177e4SLinus Torvalds 861da177e4SLinus Torvalds MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids); 871da177e4SLinus Torvalds 881da177e4SLinus Torvalds static struct ccw_driver dasd_eckd_driver; /* see below */ 891da177e4SLinus Torvalds 90558b9ef0SStefan Weinhuber static void *rawpadpage; 91558b9ef0SStefan Weinhuber 92eb6e199bSStefan Weinhuber #define INIT_CQR_OK 0 93eb6e199bSStefan Weinhuber #define INIT_CQR_UNFORMATTED 1 94eb6e199bSStefan Weinhuber #define INIT_CQR_ERROR 2 95eb6e199bSStefan Weinhuber 96f932bceaSStefan Weinhuber /* emergency request for reserve/release */ 97f932bceaSStefan Weinhuber static struct { 98f932bceaSStefan Weinhuber struct dasd_ccw_req cqr; 99f932bceaSStefan Weinhuber struct ccw1 ccw; 100f932bceaSStefan Weinhuber char data[32]; 101f932bceaSStefan Weinhuber } *dasd_reserve_req; 102f932bceaSStefan Weinhuber static DEFINE_MUTEX(dasd_reserve_mutex); 103f932bceaSStefan Weinhuber 104a4d26c6aSStefan Weinhuber /* definitions for the path verification worker */ 105a4d26c6aSStefan Weinhuber struct path_verification_work_data { 106a4d26c6aSStefan Weinhuber struct work_struct worker; 107a4d26c6aSStefan Weinhuber struct dasd_device *device; 108a4d26c6aSStefan Weinhuber struct dasd_ccw_req cqr; 109a4d26c6aSStefan Weinhuber struct ccw1 ccw; 110a4d26c6aSStefan Weinhuber __u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE]; 111a4d26c6aSStefan Weinhuber int isglobal; 112a4d26c6aSStefan Weinhuber __u8 tbvpm; 113a4d26c6aSStefan Weinhuber }; 114a4d26c6aSStefan Weinhuber static struct path_verification_work_data *path_verification_worker; 115a4d26c6aSStefan Weinhuber static DEFINE_MUTEX(dasd_path_verification_mutex); 116eb6e199bSStefan Weinhuber 1175db8440cSStefan Haberland struct check_attention_work_data { 1185db8440cSStefan Haberland struct work_struct worker; 1195db8440cSStefan Haberland struct dasd_device *device; 1205db8440cSStefan Haberland __u8 lpum; 1215db8440cSStefan Haberland }; 1225db8440cSStefan Haberland 1231da177e4SLinus Torvalds /* initial attempt at a probe function. this can be simplified once 1241da177e4SLinus Torvalds * the other detection code is gone */ 1251da177e4SLinus Torvalds static int 1261da177e4SLinus Torvalds dasd_eckd_probe (struct ccw_device *cdev) 1271da177e4SLinus Torvalds { 1281da177e4SLinus Torvalds int ret; 1291da177e4SLinus Torvalds 13040545573SHorst Hummel /* set ECKD specific ccw-device options */ 131454e1fa1SPeter Oberparleiter ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE | 132454e1fa1SPeter Oberparleiter CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH); 13340545573SHorst Hummel if (ret) { 134b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s", 135b8ed5dd5SStefan Haberland "dasd_eckd_probe: could not set " 136b8ed5dd5SStefan Haberland "ccw-device options"); 1371da177e4SLinus Torvalds return ret; 13840545573SHorst Hummel } 13940545573SHorst Hummel ret = dasd_generic_probe(cdev, &dasd_eckd_discipline); 14040545573SHorst Hummel return ret; 1411da177e4SLinus Torvalds } 1421da177e4SLinus Torvalds 1431da177e4SLinus Torvalds static int 1441da177e4SLinus Torvalds dasd_eckd_set_online(struct ccw_device *cdev) 1451da177e4SLinus Torvalds { 1461da177e4SLinus Torvalds return dasd_generic_set_online(cdev, &dasd_eckd_discipline); 1471da177e4SLinus Torvalds } 1481da177e4SLinus Torvalds 1491da177e4SLinus Torvalds static const int sizes_trk0[] = { 28, 148, 84 }; 1501da177e4SLinus Torvalds #define LABEL_SIZE 140 1511da177e4SLinus Torvalds 1523bc9fef9SStefan Haberland /* head and record addresses of count_area read in analysis ccw */ 1533bc9fef9SStefan Haberland static const int count_area_head[] = { 0, 0, 0, 0, 2 }; 1543bc9fef9SStefan Haberland static const int count_area_rec[] = { 1, 2, 3, 4, 1 }; 1553bc9fef9SStefan Haberland 1561da177e4SLinus Torvalds static inline unsigned int 1571da177e4SLinus Torvalds round_up_multiple(unsigned int no, unsigned int mult) 1581da177e4SLinus Torvalds { 1591da177e4SLinus Torvalds int rem = no % mult; 1601da177e4SLinus Torvalds return (rem ? no - rem + mult : no); 1611da177e4SLinus Torvalds } 1621da177e4SLinus Torvalds 1631da177e4SLinus Torvalds static inline unsigned int 1641da177e4SLinus Torvalds ceil_quot(unsigned int d1, unsigned int d2) 1651da177e4SLinus Torvalds { 1661da177e4SLinus Torvalds return (d1 + (d2 - 1)) / d2; 1671da177e4SLinus Torvalds } 1681da177e4SLinus Torvalds 1694d284cacSHeiko Carstens static unsigned int 1701da177e4SLinus Torvalds recs_per_track(struct dasd_eckd_characteristics * rdc, 1711da177e4SLinus Torvalds unsigned int kl, unsigned int dl) 1721da177e4SLinus Torvalds { 1731da177e4SLinus Torvalds int dn, kn; 1741da177e4SLinus Torvalds 1751da177e4SLinus Torvalds switch (rdc->dev_type) { 1761da177e4SLinus Torvalds case 0x3380: 1771da177e4SLinus Torvalds if (kl) 1781da177e4SLinus Torvalds return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + 1791da177e4SLinus Torvalds ceil_quot(dl + 12, 32)); 1801da177e4SLinus Torvalds else 1811da177e4SLinus Torvalds return 1499 / (15 + ceil_quot(dl + 12, 32)); 1821da177e4SLinus Torvalds case 0x3390: 1831da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1841da177e4SLinus Torvalds if (kl) { 1851da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1861da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + 1871da177e4SLinus Torvalds 9 + ceil_quot(dl + 6 * dn, 34)); 1881da177e4SLinus Torvalds } else 1891da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); 1901da177e4SLinus Torvalds case 0x9345: 1911da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1921da177e4SLinus Torvalds if (kl) { 1931da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1941da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + 1951da177e4SLinus Torvalds ceil_quot(dl + 6 * dn, 34)); 1961da177e4SLinus Torvalds } else 1971da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); 1981da177e4SLinus Torvalds } 1991da177e4SLinus Torvalds return 0; 2001da177e4SLinus Torvalds } 2011da177e4SLinus Torvalds 202b44b0ab3SStefan Weinhuber static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head) 203b44b0ab3SStefan Weinhuber { 204b44b0ab3SStefan Weinhuber geo->cyl = (__u16) cyl; 205b44b0ab3SStefan Weinhuber geo->head = cyl >> 16; 206b44b0ab3SStefan Weinhuber geo->head <<= 4; 207b44b0ab3SStefan Weinhuber geo->head |= head; 208b44b0ab3SStefan Weinhuber } 209b44b0ab3SStefan Weinhuber 2104d284cacSHeiko Carstens static int 2111da177e4SLinus Torvalds check_XRC (struct ccw1 *de_ccw, 2121da177e4SLinus Torvalds struct DE_eckd_data *data, 2131da177e4SLinus Torvalds struct dasd_device *device) 2141da177e4SLinus Torvalds { 215543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 216d54853efSMartin Schwidefsky int rc; 2171da177e4SLinus Torvalds 218d54853efSMartin Schwidefsky if (!private->rdc_data.facilities.XRC_supported) 219d54853efSMartin Schwidefsky return 0; 2201da177e4SLinus Torvalds 2211da177e4SLinus Torvalds /* switch on System Time Stamp - needed for XRC Support */ 2221da177e4SLinus Torvalds data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ 2231da177e4SLinus Torvalds data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ 2241da177e4SLinus Torvalds 225d54853efSMartin Schwidefsky rc = get_sync_clock(&data->ep_sys_time); 226d54853efSMartin Schwidefsky /* Ignore return code if sync clock is switched off. */ 227a8f6db4dSHeiko Carstens if (rc == -EOPNOTSUPP || rc == -EACCES) 228d54853efSMartin Schwidefsky rc = 0; 2291da177e4SLinus Torvalds 2301da177e4SLinus Torvalds de_ccw->count = sizeof(struct DE_eckd_data); 2311da177e4SLinus Torvalds de_ccw->flags |= CCW_FLAG_SLI; 232d54853efSMartin Schwidefsky return rc; 2331da177e4SLinus Torvalds } 2341da177e4SLinus Torvalds 2354d284cacSHeiko Carstens static int 236b44b0ab3SStefan Weinhuber define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk, 237b44b0ab3SStefan Weinhuber unsigned int totrk, int cmd, struct dasd_device *device) 2381da177e4SLinus Torvalds { 239543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 240b44b0ab3SStefan Weinhuber u32 begcyl, endcyl; 241b44b0ab3SStefan Weinhuber u16 heads, beghead, endhead; 242d54853efSMartin Schwidefsky int rc = 0; 2431da177e4SLinus Torvalds 2441da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; 2451da177e4SLinus Torvalds ccw->flags = 0; 2461da177e4SLinus Torvalds ccw->count = 16; 2471da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 2481da177e4SLinus Torvalds 2491da177e4SLinus Torvalds memset(data, 0, sizeof(struct DE_eckd_data)); 2501da177e4SLinus Torvalds switch (cmd) { 2511da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 2521da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 2531da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 2541da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 2551da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 2561da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 2571da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 2581da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 2591da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_COUNT: 2601da177e4SLinus Torvalds data->mask.perm = 0x1; 2611da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 2621da177e4SLinus Torvalds break; 2631da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 2641da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 2651da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 2661da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 2671da177e4SLinus Torvalds data->mask.perm = 0x02; 2681da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 269d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2701da177e4SLinus Torvalds break; 2711da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 2721da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 2731da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 274d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2751da177e4SLinus Torvalds break; 2761da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 2771da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 2781da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 2791da177e4SLinus Torvalds data->mask.perm = 0x3; 2801da177e4SLinus Torvalds data->mask.auth = 0x1; 2811da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 282d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2831da177e4SLinus Torvalds break; 2841da177e4SLinus Torvalds default: 285fc19f381SStefan Haberland dev_err(&device->cdev->dev, 286fc19f381SStefan Haberland "0x%x is not a known command\n", cmd); 2871da177e4SLinus Torvalds break; 2881da177e4SLinus Torvalds } 2891da177e4SLinus Torvalds 2901da177e4SLinus Torvalds data->attributes.mode = 0x3; /* ECKD */ 2911da177e4SLinus Torvalds 2921da177e4SLinus Torvalds if ((private->rdc_data.cu_type == 0x2105 || 2931da177e4SLinus Torvalds private->rdc_data.cu_type == 0x2107 || 2941da177e4SLinus Torvalds private->rdc_data.cu_type == 0x1750) 2951da177e4SLinus Torvalds && !(private->uses_cdl && trk < 2)) 2961da177e4SLinus Torvalds data->ga_extended |= 0x40; /* Regular Data Format Mode */ 2971da177e4SLinus Torvalds 298b44b0ab3SStefan Weinhuber heads = private->rdc_data.trk_per_cyl; 299b44b0ab3SStefan Weinhuber begcyl = trk / heads; 300b44b0ab3SStefan Weinhuber beghead = trk % heads; 301b44b0ab3SStefan Weinhuber endcyl = totrk / heads; 302b44b0ab3SStefan Weinhuber endhead = totrk % heads; 3031da177e4SLinus Torvalds 3041da177e4SLinus Torvalds /* check for sequential prestage - enhance cylinder range */ 3051da177e4SLinus Torvalds if (data->attributes.operation == DASD_SEQ_PRESTAGE || 3061da177e4SLinus Torvalds data->attributes.operation == DASD_SEQ_ACCESS) { 3071da177e4SLinus Torvalds 308b44b0ab3SStefan Weinhuber if (endcyl + private->attrib.nr_cyl < private->real_cyl) 309b44b0ab3SStefan Weinhuber endcyl += private->attrib.nr_cyl; 3101da177e4SLinus Torvalds else 311b44b0ab3SStefan Weinhuber endcyl = (private->real_cyl - 1); 3121da177e4SLinus Torvalds } 3131da177e4SLinus Torvalds 314b44b0ab3SStefan Weinhuber set_ch_t(&data->beg_ext, begcyl, beghead); 315b44b0ab3SStefan Weinhuber set_ch_t(&data->end_ext, endcyl, endhead); 316d54853efSMartin Schwidefsky return rc; 3171da177e4SLinus Torvalds } 3181da177e4SLinus Torvalds 3198e09f215SStefan Weinhuber static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata, 3208e09f215SStefan Weinhuber struct dasd_device *device) 3218e09f215SStefan Weinhuber { 322543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 3238e09f215SStefan Weinhuber int rc; 3248e09f215SStefan Weinhuber 3258e09f215SStefan Weinhuber if (!private->rdc_data.facilities.XRC_supported) 3268e09f215SStefan Weinhuber return 0; 3278e09f215SStefan Weinhuber 3288e09f215SStefan Weinhuber /* switch on System Time Stamp - needed for XRC Support */ 329f3eb5384SStefan Weinhuber pfxdata->define_extent.ga_extended |= 0x08; /* 'Time Stamp Valid' */ 330f3eb5384SStefan Weinhuber pfxdata->define_extent.ga_extended |= 0x02; /* 'Extended Parameter' */ 3318e09f215SStefan Weinhuber pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */ 3328e09f215SStefan Weinhuber 333f3eb5384SStefan Weinhuber rc = get_sync_clock(&pfxdata->define_extent.ep_sys_time); 3348e09f215SStefan Weinhuber /* Ignore return code if sync clock is switched off. */ 335a8f6db4dSHeiko Carstens if (rc == -EOPNOTSUPP || rc == -EACCES) 3368e09f215SStefan Weinhuber rc = 0; 3378e09f215SStefan Weinhuber return rc; 3388e09f215SStefan Weinhuber } 3398e09f215SStefan Weinhuber 340f3eb5384SStefan Weinhuber static void fill_LRE_data(struct LRE_eckd_data *data, unsigned int trk, 341f3eb5384SStefan Weinhuber unsigned int rec_on_trk, int count, int cmd, 342f3eb5384SStefan Weinhuber struct dasd_device *device, unsigned int reclen, 343f3eb5384SStefan Weinhuber unsigned int tlf) 344f3eb5384SStefan Weinhuber { 345543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 346f3eb5384SStefan Weinhuber int sector; 347f3eb5384SStefan Weinhuber int dn, d; 348f3eb5384SStefan Weinhuber 349f3eb5384SStefan Weinhuber memset(data, 0, sizeof(*data)); 350f3eb5384SStefan Weinhuber sector = 0; 351f3eb5384SStefan Weinhuber if (rec_on_trk) { 352f3eb5384SStefan Weinhuber switch (private->rdc_data.dev_type) { 353f3eb5384SStefan Weinhuber case 0x3390: 354f3eb5384SStefan Weinhuber dn = ceil_quot(reclen + 6, 232); 355f3eb5384SStefan Weinhuber d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 356f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 357f3eb5384SStefan Weinhuber break; 358f3eb5384SStefan Weinhuber case 0x3380: 359f3eb5384SStefan Weinhuber d = 7 + ceil_quot(reclen + 12, 32); 360f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 361f3eb5384SStefan Weinhuber break; 362f3eb5384SStefan Weinhuber } 363f3eb5384SStefan Weinhuber } 364f3eb5384SStefan Weinhuber data->sector = sector; 365f3eb5384SStefan Weinhuber /* note: meaning of count depends on the operation 366f3eb5384SStefan Weinhuber * for record based I/O it's the number of records, but for 367f3eb5384SStefan Weinhuber * track based I/O it's the number of tracks 368f3eb5384SStefan Weinhuber */ 369f3eb5384SStefan Weinhuber data->count = count; 370f3eb5384SStefan Weinhuber switch (cmd) { 371f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 372f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 373f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 374f3eb5384SStefan Weinhuber break; 375f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_HOME_ADDRESS: 376f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 377f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 378f3eb5384SStefan Weinhuber break; 379f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 380f3eb5384SStefan Weinhuber data->operation.orientation = 0x1; 381f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 382f3eb5384SStefan Weinhuber data->count++; 383f3eb5384SStefan Weinhuber break; 384f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_RECORD_ZERO: 385f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 386f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 387f3eb5384SStefan Weinhuber data->count++; 388f3eb5384SStefan Weinhuber break; 389f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE: 390f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_MT: 391f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD: 392f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD_MT: 393f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 394f3eb5384SStefan Weinhuber data->length = reclen; 395f3eb5384SStefan Weinhuber data->operation.operation = 0x01; 396f3eb5384SStefan Weinhuber break; 397f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD: 398f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD_MT: 399f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 400f3eb5384SStefan Weinhuber data->length = reclen; 401f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 402f3eb5384SStefan Weinhuber break; 403e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_WRITE_FULL_TRACK: 404e4dbb0f2SStefan Haberland data->operation.orientation = 0x0; 405e4dbb0f2SStefan Haberland data->operation.operation = 0x3F; 406e4dbb0f2SStefan Haberland data->extended_operation = 0x11; 407e4dbb0f2SStefan Haberland data->length = 0; 408e4dbb0f2SStefan Haberland data->extended_parameter_length = 0x02; 409e4dbb0f2SStefan Haberland if (data->count > 8) { 410e4dbb0f2SStefan Haberland data->extended_parameter[0] = 0xFF; 411e4dbb0f2SStefan Haberland data->extended_parameter[1] = 0xFF; 412e4dbb0f2SStefan Haberland data->extended_parameter[1] <<= (16 - count); 413e4dbb0f2SStefan Haberland } else { 414e4dbb0f2SStefan Haberland data->extended_parameter[0] = 0xFF; 415e4dbb0f2SStefan Haberland data->extended_parameter[0] <<= (8 - count); 416e4dbb0f2SStefan Haberland data->extended_parameter[1] = 0x00; 417e4dbb0f2SStefan Haberland } 418e4dbb0f2SStefan Haberland data->sector = 0xFF; 419e4dbb0f2SStefan Haberland break; 420f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 421f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 422f3eb5384SStefan Weinhuber data->length = reclen; /* not tlf, as one might think */ 423f3eb5384SStefan Weinhuber data->operation.operation = 0x3F; 424f3eb5384SStefan Weinhuber data->extended_operation = 0x23; 425f3eb5384SStefan Weinhuber break; 426f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ: 427f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_MT: 428f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_KD: 429f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_KD_MT: 430f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 431f3eb5384SStefan Weinhuber data->length = reclen; 432f3eb5384SStefan Weinhuber data->operation.operation = 0x06; 433f3eb5384SStefan Weinhuber break; 434f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD: 435f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD_MT: 436f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 437f3eb5384SStefan Weinhuber data->length = reclen; 438f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 439f3eb5384SStefan Weinhuber break; 440f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_COUNT: 441f3eb5384SStefan Weinhuber data->operation.operation = 0x06; 442f3eb5384SStefan Weinhuber break; 443e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_READ_TRACK: 444e4dbb0f2SStefan Haberland data->operation.orientation = 0x1; 445e4dbb0f2SStefan Haberland data->operation.operation = 0x0C; 446e4dbb0f2SStefan Haberland data->extended_parameter_length = 0; 447e4dbb0f2SStefan Haberland data->sector = 0xFF; 448e4dbb0f2SStefan Haberland break; 449f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 450f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 451f3eb5384SStefan Weinhuber data->length = tlf; 452f3eb5384SStefan Weinhuber data->operation.operation = 0x0C; 453f3eb5384SStefan Weinhuber break; 454f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_ERASE: 455f3eb5384SStefan Weinhuber data->length = reclen; 456f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 457f3eb5384SStefan Weinhuber data->operation.operation = 0x0b; 458f3eb5384SStefan Weinhuber break; 459f3eb5384SStefan Weinhuber default: 460f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, device, 461f3eb5384SStefan Weinhuber "fill LRE unknown opcode 0x%x", cmd); 462f3eb5384SStefan Weinhuber BUG(); 463f3eb5384SStefan Weinhuber } 464f3eb5384SStefan Weinhuber set_ch_t(&data->seek_addr, 465f3eb5384SStefan Weinhuber trk / private->rdc_data.trk_per_cyl, 466f3eb5384SStefan Weinhuber trk % private->rdc_data.trk_per_cyl); 467f3eb5384SStefan Weinhuber data->search_arg.cyl = data->seek_addr.cyl; 468f3eb5384SStefan Weinhuber data->search_arg.head = data->seek_addr.head; 469f3eb5384SStefan Weinhuber data->search_arg.record = rec_on_trk; 470f3eb5384SStefan Weinhuber } 471f3eb5384SStefan Weinhuber 472f3eb5384SStefan Weinhuber static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 473b44b0ab3SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 474f3eb5384SStefan Weinhuber struct dasd_device *basedev, struct dasd_device *startdev, 475f3eb5384SStefan Weinhuber unsigned char format, unsigned int rec_on_trk, int count, 476f3eb5384SStefan Weinhuber unsigned int blksize, unsigned int tlf) 4778e09f215SStefan Weinhuber { 4788e09f215SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 479f3eb5384SStefan Weinhuber struct DE_eckd_data *dedata; 480f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 481b44b0ab3SStefan Weinhuber u32 begcyl, endcyl; 482b44b0ab3SStefan Weinhuber u16 heads, beghead, endhead; 4838e09f215SStefan Weinhuber int rc = 0; 4848e09f215SStefan Weinhuber 485543691a4SSebastian Ott basepriv = basedev->private; 486543691a4SSebastian Ott startpriv = startdev->private; 487f3eb5384SStefan Weinhuber dedata = &pfxdata->define_extent; 488f3eb5384SStefan Weinhuber lredata = &pfxdata->locate_record; 4898e09f215SStefan Weinhuber 4908e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PFX; 4918e09f215SStefan Weinhuber ccw->flags = 0; 492e4dbb0f2SStefan Haberland if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) { 493e4dbb0f2SStefan Haberland ccw->count = sizeof(*pfxdata) + 2; 494e4dbb0f2SStefan Haberland ccw->cda = (__u32) __pa(pfxdata); 495e4dbb0f2SStefan Haberland memset(pfxdata, 0, sizeof(*pfxdata) + 2); 496e4dbb0f2SStefan Haberland } else { 4978e09f215SStefan Weinhuber ccw->count = sizeof(*pfxdata); 4988e09f215SStefan Weinhuber ccw->cda = (__u32) __pa(pfxdata); 4998e09f215SStefan Weinhuber memset(pfxdata, 0, sizeof(*pfxdata)); 500e4dbb0f2SStefan Haberland } 501e4dbb0f2SStefan Haberland 5028e09f215SStefan Weinhuber /* prefix data */ 503f3eb5384SStefan Weinhuber if (format > 1) { 504f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 505f3eb5384SStefan Weinhuber "PFX LRE unknown format 0x%x", format); 506f3eb5384SStefan Weinhuber BUG(); 507f3eb5384SStefan Weinhuber return -EINVAL; 508f3eb5384SStefan Weinhuber } 509f3eb5384SStefan Weinhuber pfxdata->format = format; 5104abb08c2SStefan Weinhuber pfxdata->base_address = basepriv->ned->unit_addr; 5114abb08c2SStefan Weinhuber pfxdata->base_lss = basepriv->ned->ID; 512f3eb5384SStefan Weinhuber pfxdata->validity.define_extent = 1; 5138e09f215SStefan Weinhuber 5148e09f215SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 5158e09f215SStefan Weinhuber if (startpriv->uid.type != UA_BASE_DEVICE) { 5168e09f215SStefan Weinhuber pfxdata->validity.verify_base = 1; 5178e09f215SStefan Weinhuber if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 5188e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 1; 5198e09f215SStefan Weinhuber } 5208e09f215SStefan Weinhuber 5218e09f215SStefan Weinhuber /* define extend data (mostly)*/ 5228e09f215SStefan Weinhuber switch (cmd) { 5238e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_HOME_ADDRESS: 5248e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_RECORD_ZERO: 5258e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ: 5268e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_MT: 5278e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD: 5288e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD_MT: 5298e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_KD: 5308e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_KD_MT: 5318e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_COUNT: 532f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 533f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 534f3eb5384SStefan Weinhuber break; 535e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_READ_TRACK: 536f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 537f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 538f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 539f3eb5384SStefan Weinhuber dedata->blk_size = 0; 5408e09f215SStefan Weinhuber break; 5418e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE: 5428e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_MT: 5438e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD: 5448e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD_MT: 545f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 546f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 5478e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 5488e09f215SStefan Weinhuber break; 5498e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD: 5508e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD_MT: 551f3eb5384SStefan Weinhuber dedata->attributes.operation = DASD_BYPASS_CACHE; 5528e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 5538e09f215SStefan Weinhuber break; 5548e09f215SStefan Weinhuber case DASD_ECKD_CCW_ERASE: 5558e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 5568e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 557f3eb5384SStefan Weinhuber dedata->mask.perm = 0x3; 558f3eb5384SStefan Weinhuber dedata->mask.auth = 0x1; 559f3eb5384SStefan Weinhuber dedata->attributes.operation = DASD_BYPASS_CACHE; 560f3eb5384SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 561f3eb5384SStefan Weinhuber break; 562e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_WRITE_FULL_TRACK: 563e4dbb0f2SStefan Haberland dedata->mask.perm = 0x03; 564e4dbb0f2SStefan Haberland dedata->attributes.operation = basepriv->attrib.operation; 565e4dbb0f2SStefan Haberland dedata->blk_size = 0; 566e4dbb0f2SStefan Haberland break; 567f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 568f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 569f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 570f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 5718e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 5728e09f215SStefan Weinhuber break; 5738e09f215SStefan Weinhuber default: 574f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 575f3eb5384SStefan Weinhuber "PFX LRE unknown opcode 0x%x", cmd); 576f3eb5384SStefan Weinhuber BUG(); 577f3eb5384SStefan Weinhuber return -EINVAL; 5788e09f215SStefan Weinhuber } 5798e09f215SStefan Weinhuber 580f3eb5384SStefan Weinhuber dedata->attributes.mode = 0x3; /* ECKD */ 5818e09f215SStefan Weinhuber 5828e09f215SStefan Weinhuber if ((basepriv->rdc_data.cu_type == 0x2105 || 5838e09f215SStefan Weinhuber basepriv->rdc_data.cu_type == 0x2107 || 5848e09f215SStefan Weinhuber basepriv->rdc_data.cu_type == 0x1750) 5858e09f215SStefan Weinhuber && !(basepriv->uses_cdl && trk < 2)) 586f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x40; /* Regular Data Format Mode */ 5878e09f215SStefan Weinhuber 588b44b0ab3SStefan Weinhuber heads = basepriv->rdc_data.trk_per_cyl; 589b44b0ab3SStefan Weinhuber begcyl = trk / heads; 590b44b0ab3SStefan Weinhuber beghead = trk % heads; 591b44b0ab3SStefan Weinhuber endcyl = totrk / heads; 592b44b0ab3SStefan Weinhuber endhead = totrk % heads; 5938e09f215SStefan Weinhuber 5948e09f215SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 595f3eb5384SStefan Weinhuber if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 596f3eb5384SStefan Weinhuber dedata->attributes.operation == DASD_SEQ_ACCESS) { 5978e09f215SStefan Weinhuber 598b44b0ab3SStefan Weinhuber if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 599b44b0ab3SStefan Weinhuber endcyl += basepriv->attrib.nr_cyl; 6008e09f215SStefan Weinhuber else 601b44b0ab3SStefan Weinhuber endcyl = (basepriv->real_cyl - 1); 6028e09f215SStefan Weinhuber } 6038e09f215SStefan Weinhuber 604f3eb5384SStefan Weinhuber set_ch_t(&dedata->beg_ext, begcyl, beghead); 605f3eb5384SStefan Weinhuber set_ch_t(&dedata->end_ext, endcyl, endhead); 606f3eb5384SStefan Weinhuber 607f3eb5384SStefan Weinhuber if (format == 1) { 608f3eb5384SStefan Weinhuber fill_LRE_data(lredata, trk, rec_on_trk, count, cmd, 609f3eb5384SStefan Weinhuber basedev, blksize, tlf); 610f3eb5384SStefan Weinhuber } 611f3eb5384SStefan Weinhuber 6128e09f215SStefan Weinhuber return rc; 6138e09f215SStefan Weinhuber } 6148e09f215SStefan Weinhuber 615f3eb5384SStefan Weinhuber static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 616f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 617f3eb5384SStefan Weinhuber struct dasd_device *basedev, struct dasd_device *startdev) 618f3eb5384SStefan Weinhuber { 619f3eb5384SStefan Weinhuber return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev, 620f3eb5384SStefan Weinhuber 0, 0, 0, 0, 0); 621f3eb5384SStefan Weinhuber } 622f3eb5384SStefan Weinhuber 6234d284cacSHeiko Carstens static void 624b44b0ab3SStefan Weinhuber locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk, 625b44b0ab3SStefan Weinhuber unsigned int rec_on_trk, int no_rec, int cmd, 6261da177e4SLinus Torvalds struct dasd_device * device, int reclen) 6271da177e4SLinus Torvalds { 628543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 6291da177e4SLinus Torvalds int sector; 6301da177e4SLinus Torvalds int dn, d; 6311da177e4SLinus Torvalds 6321da177e4SLinus Torvalds DBF_DEV_EVENT(DBF_INFO, device, 6331da177e4SLinus Torvalds "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", 6341da177e4SLinus Torvalds trk, rec_on_trk, no_rec, cmd, reclen); 6351da177e4SLinus Torvalds 6361da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; 6371da177e4SLinus Torvalds ccw->flags = 0; 6381da177e4SLinus Torvalds ccw->count = 16; 6391da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 6401da177e4SLinus Torvalds 6411da177e4SLinus Torvalds memset(data, 0, sizeof(struct LO_eckd_data)); 6421da177e4SLinus Torvalds sector = 0; 6431da177e4SLinus Torvalds if (rec_on_trk) { 6441da177e4SLinus Torvalds switch (private->rdc_data.dev_type) { 6451da177e4SLinus Torvalds case 0x3390: 6461da177e4SLinus Torvalds dn = ceil_quot(reclen + 6, 232); 6471da177e4SLinus Torvalds d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 6481da177e4SLinus Torvalds sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 6491da177e4SLinus Torvalds break; 6501da177e4SLinus Torvalds case 0x3380: 6511da177e4SLinus Torvalds d = 7 + ceil_quot(reclen + 12, 32); 6521da177e4SLinus Torvalds sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 6531da177e4SLinus Torvalds break; 6541da177e4SLinus Torvalds } 6551da177e4SLinus Torvalds } 6561da177e4SLinus Torvalds data->sector = sector; 6571da177e4SLinus Torvalds data->count = no_rec; 6581da177e4SLinus Torvalds switch (cmd) { 6591da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 6601da177e4SLinus Torvalds data->operation.orientation = 0x3; 6611da177e4SLinus Torvalds data->operation.operation = 0x03; 6621da177e4SLinus Torvalds break; 6631da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 6641da177e4SLinus Torvalds data->operation.orientation = 0x3; 6651da177e4SLinus Torvalds data->operation.operation = 0x16; 6661da177e4SLinus Torvalds break; 6671da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 6681da177e4SLinus Torvalds data->operation.orientation = 0x1; 6691da177e4SLinus Torvalds data->operation.operation = 0x03; 6701da177e4SLinus Torvalds data->count++; 6711da177e4SLinus Torvalds break; 6721da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 6731da177e4SLinus Torvalds data->operation.orientation = 0x3; 6741da177e4SLinus Torvalds data->operation.operation = 0x16; 6751da177e4SLinus Torvalds data->count++; 6761da177e4SLinus Torvalds break; 6771da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 6781da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 6791da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 6801da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 6811da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6821da177e4SLinus Torvalds data->length = reclen; 6831da177e4SLinus Torvalds data->operation.operation = 0x01; 6841da177e4SLinus Torvalds break; 6851da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 6861da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 6871da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6881da177e4SLinus Torvalds data->length = reclen; 6891da177e4SLinus Torvalds data->operation.operation = 0x03; 6901da177e4SLinus Torvalds break; 6911da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 6921da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 6931da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 6941da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 6951da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6961da177e4SLinus Torvalds data->length = reclen; 6971da177e4SLinus Torvalds data->operation.operation = 0x06; 6981da177e4SLinus Torvalds break; 6991da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 7001da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 7011da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 7021da177e4SLinus Torvalds data->length = reclen; 7031da177e4SLinus Torvalds data->operation.operation = 0x16; 7041da177e4SLinus Torvalds break; 7051da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_COUNT: 7061da177e4SLinus Torvalds data->operation.operation = 0x06; 7071da177e4SLinus Torvalds break; 7081da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 7091da177e4SLinus Torvalds data->length = reclen; 7101da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 7111da177e4SLinus Torvalds data->operation.operation = 0x0b; 7121da177e4SLinus Torvalds break; 7131da177e4SLinus Torvalds default: 714fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record " 715fc19f381SStefan Haberland "opcode 0x%x", cmd); 7161da177e4SLinus Torvalds } 717b44b0ab3SStefan Weinhuber set_ch_t(&data->seek_addr, 718b44b0ab3SStefan Weinhuber trk / private->rdc_data.trk_per_cyl, 719b44b0ab3SStefan Weinhuber trk % private->rdc_data.trk_per_cyl); 720b44b0ab3SStefan Weinhuber data->search_arg.cyl = data->seek_addr.cyl; 721b44b0ab3SStefan Weinhuber data->search_arg.head = data->seek_addr.head; 7221da177e4SLinus Torvalds data->search_arg.record = rec_on_trk; 7231da177e4SLinus Torvalds } 7241da177e4SLinus Torvalds 7251da177e4SLinus Torvalds /* 7261da177e4SLinus Torvalds * Returns 1 if the block is one of the special blocks that needs 7271da177e4SLinus Torvalds * to get read/written with the KD variant of the command. 7281da177e4SLinus Torvalds * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and 7291da177e4SLinus Torvalds * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. 7301da177e4SLinus Torvalds * Luckily the KD variants differ only by one bit (0x08) from the 7311da177e4SLinus Torvalds * normal variant. So don't wonder about code like: 7321da177e4SLinus Torvalds * if (dasd_eckd_cdl_special(blk_per_trk, recid)) 7331da177e4SLinus Torvalds * ccw->cmd_code |= 0x8; 7341da177e4SLinus Torvalds */ 7351da177e4SLinus Torvalds static inline int 7361da177e4SLinus Torvalds dasd_eckd_cdl_special(int blk_per_trk, int recid) 7371da177e4SLinus Torvalds { 7381da177e4SLinus Torvalds if (recid < 3) 7391da177e4SLinus Torvalds return 1; 7401da177e4SLinus Torvalds if (recid < blk_per_trk) 7411da177e4SLinus Torvalds return 0; 7421da177e4SLinus Torvalds if (recid < 2 * blk_per_trk) 7431da177e4SLinus Torvalds return 1; 7441da177e4SLinus Torvalds return 0; 7451da177e4SLinus Torvalds } 7461da177e4SLinus Torvalds 7471da177e4SLinus Torvalds /* 7481da177e4SLinus Torvalds * Returns the record size for the special blocks of the cdl format. 7491da177e4SLinus Torvalds * Only returns something useful if dasd_eckd_cdl_special is true 7501da177e4SLinus Torvalds * for the recid. 7511da177e4SLinus Torvalds */ 7521da177e4SLinus Torvalds static inline int 7531da177e4SLinus Torvalds dasd_eckd_cdl_reclen(int recid) 7541da177e4SLinus Torvalds { 7551da177e4SLinus Torvalds if (recid < 3) 7561da177e4SLinus Torvalds return sizes_trk0[recid]; 7571da177e4SLinus Torvalds return LABEL_SIZE; 7581da177e4SLinus Torvalds } 759b206181dSStefan Haberland /* create unique id from private structure. */ 760b206181dSStefan Haberland static void create_uid(struct dasd_eckd_private *private) 7613d052595SHorst Hummel { 7624abb08c2SStefan Weinhuber int count; 763b206181dSStefan Haberland struct dasd_uid *uid; 7643d052595SHorst Hummel 7652dedf0d9SStefan Haberland uid = &private->uid; 7663d052595SHorst Hummel memset(uid, 0, sizeof(struct dasd_uid)); 7674abb08c2SStefan Weinhuber memcpy(uid->vendor, private->ned->HDA_manufacturer, 7683d052595SHorst Hummel sizeof(uid->vendor) - 1); 7693d052595SHorst Hummel EBCASC(uid->vendor, sizeof(uid->vendor) - 1); 7704abb08c2SStefan Weinhuber memcpy(uid->serial, private->ned->HDA_location, 7713d052595SHorst Hummel sizeof(uid->serial) - 1); 7723d052595SHorst Hummel EBCASC(uid->serial, sizeof(uid->serial) - 1); 7734abb08c2SStefan Weinhuber uid->ssid = private->gneq->subsystemID; 774a419aef8SJoe Perches uid->real_unit_addr = private->ned->unit_addr; 7754abb08c2SStefan Weinhuber if (private->sneq) { 7764abb08c2SStefan Weinhuber uid->type = private->sneq->sua_flags; 7778e09f215SStefan Weinhuber if (uid->type == UA_BASE_PAV_ALIAS) 7784abb08c2SStefan Weinhuber uid->base_unit_addr = private->sneq->base_unit_addr; 7798e09f215SStefan Weinhuber } else { 7808e09f215SStefan Weinhuber uid->type = UA_BASE_DEVICE; 7818e09f215SStefan Weinhuber } 7824abb08c2SStefan Weinhuber if (private->vdsneq) { 7834abb08c2SStefan Weinhuber for (count = 0; count < 16; count++) { 7844abb08c2SStefan Weinhuber sprintf(uid->vduit+2*count, "%02x", 7854abb08c2SStefan Weinhuber private->vdsneq->uit[count]); 7864abb08c2SStefan Weinhuber } 7874abb08c2SStefan Weinhuber } 788b206181dSStefan Haberland } 789b206181dSStefan Haberland 790b206181dSStefan Haberland /* 791b206181dSStefan Haberland * Generate device unique id that specifies the physical device. 792b206181dSStefan Haberland */ 793b206181dSStefan Haberland static int dasd_eckd_generate_uid(struct dasd_device *device) 794b206181dSStefan Haberland { 795543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 796b206181dSStefan Haberland unsigned long flags; 797b206181dSStefan Haberland 798b206181dSStefan Haberland if (!private) 799b206181dSStefan Haberland return -ENODEV; 800b206181dSStefan Haberland if (!private->ned || !private->gneq) 801b206181dSStefan Haberland return -ENODEV; 802b206181dSStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 803b206181dSStefan Haberland create_uid(private); 8042dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 8053d052595SHorst Hummel return 0; 8063d052595SHorst Hummel } 8073d052595SHorst Hummel 8082dedf0d9SStefan Haberland static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid) 8092dedf0d9SStefan Haberland { 810543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 8112dedf0d9SStefan Haberland unsigned long flags; 8122dedf0d9SStefan Haberland 813543691a4SSebastian Ott if (private) { 8142dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 8152dedf0d9SStefan Haberland *uid = private->uid; 8162dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 8172dedf0d9SStefan Haberland return 0; 8182dedf0d9SStefan Haberland } 8192dedf0d9SStefan Haberland return -EINVAL; 8202dedf0d9SStefan Haberland } 8212dedf0d9SStefan Haberland 822b206181dSStefan Haberland /* 823b206181dSStefan Haberland * compare device UID with data of a given dasd_eckd_private structure 824b206181dSStefan Haberland * return 0 for match 825b206181dSStefan Haberland */ 826b206181dSStefan Haberland static int dasd_eckd_compare_path_uid(struct dasd_device *device, 827b206181dSStefan Haberland struct dasd_eckd_private *private) 828b206181dSStefan Haberland { 829b206181dSStefan Haberland struct dasd_uid device_uid; 830b206181dSStefan Haberland 831b206181dSStefan Haberland create_uid(private); 832b206181dSStefan Haberland dasd_eckd_get_uid(device, &device_uid); 833b206181dSStefan Haberland 834b206181dSStefan Haberland return memcmp(&device_uid, &private->uid, sizeof(struct dasd_uid)); 835b206181dSStefan Haberland } 836b206181dSStefan Haberland 837a4d26c6aSStefan Weinhuber static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device, 838a4d26c6aSStefan Weinhuber struct dasd_ccw_req *cqr, 839a4d26c6aSStefan Weinhuber __u8 *rcd_buffer, 840a4d26c6aSStefan Weinhuber __u8 lpm) 84117283b56SCornelia Huck { 84217283b56SCornelia Huck struct ccw1 *ccw; 843a4d26c6aSStefan Weinhuber /* 844a4d26c6aSStefan Weinhuber * buffer has to start with EBCDIC "V1.0" to show 845a4d26c6aSStefan Weinhuber * support for virtual device SNEQ 846a4d26c6aSStefan Weinhuber */ 847a4d26c6aSStefan Weinhuber rcd_buffer[0] = 0xE5; 848a4d26c6aSStefan Weinhuber rcd_buffer[1] = 0xF1; 849a4d26c6aSStefan Weinhuber rcd_buffer[2] = 0x4B; 850a4d26c6aSStefan Weinhuber rcd_buffer[3] = 0xF0; 85117283b56SCornelia Huck 85217283b56SCornelia Huck ccw = cqr->cpaddr; 853a4d26c6aSStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RCD; 854a4d26c6aSStefan Weinhuber ccw->flags = 0; 85517283b56SCornelia Huck ccw->cda = (__u32)(addr_t)rcd_buffer; 856a4d26c6aSStefan Weinhuber ccw->count = DASD_ECKD_RCD_DATA_SIZE; 857a4d26c6aSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 85817283b56SCornelia Huck 8598e09f215SStefan Weinhuber cqr->startdev = device; 8608e09f215SStefan Weinhuber cqr->memdev = device; 8618e09f215SStefan Weinhuber cqr->block = NULL; 86217283b56SCornelia Huck cqr->expires = 10*HZ; 86317283b56SCornelia Huck cqr->lpm = lpm; 864eb6e199bSStefan Weinhuber cqr->retries = 256; 8651aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 86617283b56SCornelia Huck cqr->status = DASD_CQR_FILLED; 867a4d26c6aSStefan Weinhuber set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 868a4d26c6aSStefan Weinhuber } 869a4d26c6aSStefan Weinhuber 8705915a873SStefan Haberland /* 8715915a873SStefan Haberland * Wakeup helper for read_conf 8725915a873SStefan Haberland * if the cqr is not done and needs some error recovery 8735915a873SStefan Haberland * the buffer has to be re-initialized with the EBCDIC "V1.0" 8745915a873SStefan Haberland * to show support for virtual device SNEQ 8755915a873SStefan Haberland */ 8765915a873SStefan Haberland static void read_conf_cb(struct dasd_ccw_req *cqr, void *data) 8775915a873SStefan Haberland { 8785915a873SStefan Haberland struct ccw1 *ccw; 8795915a873SStefan Haberland __u8 *rcd_buffer; 8805915a873SStefan Haberland 8815915a873SStefan Haberland if (cqr->status != DASD_CQR_DONE) { 8825915a873SStefan Haberland ccw = cqr->cpaddr; 8835915a873SStefan Haberland rcd_buffer = (__u8 *)((addr_t) ccw->cda); 8845915a873SStefan Haberland memset(rcd_buffer, 0, sizeof(*rcd_buffer)); 8855915a873SStefan Haberland 8865915a873SStefan Haberland rcd_buffer[0] = 0xE5; 8875915a873SStefan Haberland rcd_buffer[1] = 0xF1; 8885915a873SStefan Haberland rcd_buffer[2] = 0x4B; 8895915a873SStefan Haberland rcd_buffer[3] = 0xF0; 8905915a873SStefan Haberland } 8915915a873SStefan Haberland dasd_wakeup_cb(cqr, data); 8925915a873SStefan Haberland } 8935915a873SStefan Haberland 894a4d26c6aSStefan Weinhuber static int dasd_eckd_read_conf_immediately(struct dasd_device *device, 895a4d26c6aSStefan Weinhuber struct dasd_ccw_req *cqr, 896a4d26c6aSStefan Weinhuber __u8 *rcd_buffer, 897a4d26c6aSStefan Weinhuber __u8 lpm) 898a4d26c6aSStefan Weinhuber { 899a4d26c6aSStefan Weinhuber struct ciw *ciw; 900a4d26c6aSStefan Weinhuber int rc; 901a4d26c6aSStefan Weinhuber /* 902a4d26c6aSStefan Weinhuber * sanity check: scan for RCD command in extended SenseID data 903a4d26c6aSStefan Weinhuber * some devices do not support RCD 904a4d26c6aSStefan Weinhuber */ 905a4d26c6aSStefan Weinhuber ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 906a4d26c6aSStefan Weinhuber if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) 907a4d26c6aSStefan Weinhuber return -EOPNOTSUPP; 908a4d26c6aSStefan Weinhuber 909a4d26c6aSStefan Weinhuber dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm); 910a4d26c6aSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 9115a27e60dSStefan Weinhuber set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 912a4d26c6aSStefan Weinhuber cqr->retries = 5; 9135915a873SStefan Haberland cqr->callback = read_conf_cb; 914a4d26c6aSStefan Weinhuber rc = dasd_sleep_on_immediatly(cqr); 915a4d26c6aSStefan Weinhuber return rc; 91617283b56SCornelia Huck } 91717283b56SCornelia Huck 91817283b56SCornelia Huck static int dasd_eckd_read_conf_lpm(struct dasd_device *device, 91917283b56SCornelia Huck void **rcd_buffer, 92017283b56SCornelia Huck int *rcd_buffer_size, __u8 lpm) 92117283b56SCornelia Huck { 92217283b56SCornelia Huck struct ciw *ciw; 92317283b56SCornelia Huck char *rcd_buf = NULL; 92417283b56SCornelia Huck int ret; 92517283b56SCornelia Huck struct dasd_ccw_req *cqr; 92617283b56SCornelia Huck 92717283b56SCornelia Huck /* 928a4d26c6aSStefan Weinhuber * sanity check: scan for RCD command in extended SenseID data 929a4d26c6aSStefan Weinhuber * some devices do not support RCD 93017283b56SCornelia Huck */ 93117283b56SCornelia Huck ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 932a4d26c6aSStefan Weinhuber if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) { 93317283b56SCornelia Huck ret = -EOPNOTSUPP; 93417283b56SCornelia Huck goto out_error; 93517283b56SCornelia Huck } 936a4d26c6aSStefan Weinhuber rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA); 93717283b56SCornelia Huck if (!rcd_buf) { 93817283b56SCornelia Huck ret = -ENOMEM; 93917283b56SCornelia Huck goto out_error; 94017283b56SCornelia Huck } 941a4d26c6aSStefan Weinhuber cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, 942a4d26c6aSStefan Weinhuber 0, /* use rcd_buf as data ara */ 943a4d26c6aSStefan Weinhuber device); 94417283b56SCornelia Huck if (IS_ERR(cqr)) { 945a4d26c6aSStefan Weinhuber DBF_DEV_EVENT(DBF_WARNING, device, "%s", 946a4d26c6aSStefan Weinhuber "Could not allocate RCD request"); 947a4d26c6aSStefan Weinhuber ret = -ENOMEM; 94817283b56SCornelia Huck goto out_error; 94917283b56SCornelia Huck } 950a4d26c6aSStefan Weinhuber dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm); 9515915a873SStefan Haberland cqr->callback = read_conf_cb; 95217283b56SCornelia Huck ret = dasd_sleep_on(cqr); 95317283b56SCornelia Huck /* 95417283b56SCornelia Huck * on success we update the user input parms 95517283b56SCornelia Huck */ 9568e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 95717283b56SCornelia Huck if (ret) 95817283b56SCornelia Huck goto out_error; 95917283b56SCornelia Huck 960a4d26c6aSStefan Weinhuber *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE; 96117283b56SCornelia Huck *rcd_buffer = rcd_buf; 96217283b56SCornelia Huck return 0; 96317283b56SCornelia Huck out_error: 96417283b56SCornelia Huck kfree(rcd_buf); 96517283b56SCornelia Huck *rcd_buffer = NULL; 96617283b56SCornelia Huck *rcd_buffer_size = 0; 96717283b56SCornelia Huck return ret; 96817283b56SCornelia Huck } 96917283b56SCornelia Huck 9704abb08c2SStefan Weinhuber static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private) 9714abb08c2SStefan Weinhuber { 9724abb08c2SStefan Weinhuber 9734abb08c2SStefan Weinhuber struct dasd_sneq *sneq; 9744abb08c2SStefan Weinhuber int i, count; 9754abb08c2SStefan Weinhuber 9764abb08c2SStefan Weinhuber private->ned = NULL; 9774abb08c2SStefan Weinhuber private->sneq = NULL; 9784abb08c2SStefan Weinhuber private->vdsneq = NULL; 9794abb08c2SStefan Weinhuber private->gneq = NULL; 9804abb08c2SStefan Weinhuber count = private->conf_len / sizeof(struct dasd_sneq); 9814abb08c2SStefan Weinhuber sneq = (struct dasd_sneq *)private->conf_data; 9824abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 9834abb08c2SStefan Weinhuber if (sneq->flags.identifier == 1 && sneq->format == 1) 9844abb08c2SStefan Weinhuber private->sneq = sneq; 9854abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 1 && sneq->format == 4) 9864abb08c2SStefan Weinhuber private->vdsneq = (struct vd_sneq *)sneq; 9874abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 2) 9884abb08c2SStefan Weinhuber private->gneq = (struct dasd_gneq *)sneq; 9894abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 3 && sneq->res1 == 1) 9904abb08c2SStefan Weinhuber private->ned = (struct dasd_ned *)sneq; 9914abb08c2SStefan Weinhuber sneq++; 9924abb08c2SStefan Weinhuber } 9934abb08c2SStefan Weinhuber if (!private->ned || !private->gneq) { 9944abb08c2SStefan Weinhuber private->ned = NULL; 9954abb08c2SStefan Weinhuber private->sneq = NULL; 9964abb08c2SStefan Weinhuber private->vdsneq = NULL; 9974abb08c2SStefan Weinhuber private->gneq = NULL; 9984abb08c2SStefan Weinhuber return -EINVAL; 9994abb08c2SStefan Weinhuber } 10004abb08c2SStefan Weinhuber return 0; 10014abb08c2SStefan Weinhuber 10024abb08c2SStefan Weinhuber }; 10034abb08c2SStefan Weinhuber 10044abb08c2SStefan Weinhuber static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len) 10054abb08c2SStefan Weinhuber { 10064abb08c2SStefan Weinhuber struct dasd_gneq *gneq; 10074abb08c2SStefan Weinhuber int i, count, found; 10084abb08c2SStefan Weinhuber 10094abb08c2SStefan Weinhuber count = conf_len / sizeof(*gneq); 10104abb08c2SStefan Weinhuber gneq = (struct dasd_gneq *)conf_data; 10114abb08c2SStefan Weinhuber found = 0; 10124abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 10134abb08c2SStefan Weinhuber if (gneq->flags.identifier == 2) { 10144abb08c2SStefan Weinhuber found = 1; 10154abb08c2SStefan Weinhuber break; 10164abb08c2SStefan Weinhuber } 10174abb08c2SStefan Weinhuber gneq++; 10184abb08c2SStefan Weinhuber } 10194abb08c2SStefan Weinhuber if (found) 10204abb08c2SStefan Weinhuber return ((char *)gneq)[18] & 0x07; 10214abb08c2SStefan Weinhuber else 10224abb08c2SStefan Weinhuber return 0; 10234abb08c2SStefan Weinhuber } 10244abb08c2SStefan Weinhuber 1025c7c0c9deSStefan Haberland static void dasd_eckd_clear_conf_data(struct dasd_device *device) 1026c7c0c9deSStefan Haberland { 1027543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1028c7c0c9deSStefan Haberland int i; 1029c7c0c9deSStefan Haberland 1030c7c0c9deSStefan Haberland private->conf_data = NULL; 1031c7c0c9deSStefan Haberland private->conf_len = 0; 1032c7c0c9deSStefan Haberland for (i = 0; i < 8; i++) { 1033c7c0c9deSStefan Haberland kfree(private->path_conf_data[i]); 1034c7c0c9deSStefan Haberland private->path_conf_data[i] = NULL; 1035c7c0c9deSStefan Haberland } 1036c7c0c9deSStefan Haberland } 1037c7c0c9deSStefan Haberland 1038c7c0c9deSStefan Haberland 10394abb08c2SStefan Weinhuber static int dasd_eckd_read_conf(struct dasd_device *device) 10401da177e4SLinus Torvalds { 10411da177e4SLinus Torvalds void *conf_data; 10421da177e4SLinus Torvalds int conf_len, conf_data_saved; 1043b179b037SStefan Haberland int rc, path_err, pos; 1044a4d26c6aSStefan Weinhuber __u8 lpm, opm; 1045b206181dSStefan Haberland struct dasd_eckd_private *private, path_private; 1046a4d26c6aSStefan Weinhuber struct dasd_path *path_data; 1047b206181dSStefan Haberland struct dasd_uid *uid; 1048b206181dSStefan Haberland char print_path_uid[60], print_device_uid[60]; 10491da177e4SLinus Torvalds 1050543691a4SSebastian Ott private = device->private; 1051a4d26c6aSStefan Weinhuber path_data = &device->path_data; 1052a4d26c6aSStefan Weinhuber opm = ccw_device_get_path_mask(device->cdev); 10531da177e4SLinus Torvalds conf_data_saved = 0; 105455d3a85cSStefan Haberland path_err = 0; 10551da177e4SLinus Torvalds /* get configuration data per operational path */ 10561da177e4SLinus Torvalds for (lpm = 0x80; lpm; lpm>>= 1) { 1057b206181dSStefan Haberland if (!(lpm & opm)) 1058b206181dSStefan Haberland continue; 105917283b56SCornelia Huck rc = dasd_eckd_read_conf_lpm(device, &conf_data, 10601da177e4SLinus Torvalds &conf_len, lpm); 10611da177e4SLinus Torvalds if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ 1062b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 10631da177e4SLinus Torvalds "Read configuration data returned " 1064b8ed5dd5SStefan Haberland "error %d", rc); 10651da177e4SLinus Torvalds return rc; 10661da177e4SLinus Torvalds } 10671da177e4SLinus Torvalds if (conf_data == NULL) { 1068b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1069b8ed5dd5SStefan Haberland "No configuration data " 1070b8ed5dd5SStefan Haberland "retrieved"); 1071a4d26c6aSStefan Weinhuber /* no further analysis possible */ 1072a4d26c6aSStefan Weinhuber path_data->opm |= lpm; 1073d133a960SGabriel Craciunescu continue; /* no error */ 10741da177e4SLinus Torvalds } 10751da177e4SLinus Torvalds /* save first valid configuration data */ 10761da177e4SLinus Torvalds if (!conf_data_saved) { 1077c7c0c9deSStefan Haberland /* initially clear previously stored conf_data */ 1078c7c0c9deSStefan Haberland dasd_eckd_clear_conf_data(device); 10794abb08c2SStefan Weinhuber private->conf_data = conf_data; 10804abb08c2SStefan Weinhuber private->conf_len = conf_len; 10814abb08c2SStefan Weinhuber if (dasd_eckd_identify_conf_parts(private)) { 10824abb08c2SStefan Weinhuber private->conf_data = NULL; 10834abb08c2SStefan Weinhuber private->conf_len = 0; 10844abb08c2SStefan Weinhuber kfree(conf_data); 10854abb08c2SStefan Weinhuber continue; 10864abb08c2SStefan Weinhuber } 1087c7c0c9deSStefan Haberland pos = pathmask_to_pos(lpm); 1088c7c0c9deSStefan Haberland /* store per path conf_data */ 1089c7c0c9deSStefan Haberland private->path_conf_data[pos] = 1090c7c0c9deSStefan Haberland (struct dasd_conf_data *) conf_data; 1091b206181dSStefan Haberland /* 1092b206181dSStefan Haberland * build device UID that other path data 1093b206181dSStefan Haberland * can be compared to it 1094b206181dSStefan Haberland */ 1095b206181dSStefan Haberland dasd_eckd_generate_uid(device); 10961da177e4SLinus Torvalds conf_data_saved++; 1097b206181dSStefan Haberland } else { 1098b206181dSStefan Haberland path_private.conf_data = conf_data; 1099b206181dSStefan Haberland path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1100b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts( 1101b206181dSStefan Haberland &path_private)) { 1102b206181dSStefan Haberland path_private.conf_data = NULL; 1103b206181dSStefan Haberland path_private.conf_len = 0; 1104b206181dSStefan Haberland kfree(conf_data); 1105b206181dSStefan Haberland continue; 1106b206181dSStefan Haberland } 1107b206181dSStefan Haberland if (dasd_eckd_compare_path_uid( 1108b206181dSStefan Haberland device, &path_private)) { 1109b206181dSStefan Haberland uid = &path_private.uid; 1110b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1111b206181dSStefan Haberland snprintf(print_path_uid, 1112b206181dSStefan Haberland sizeof(print_path_uid), 1113b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1114b206181dSStefan Haberland uid->vendor, uid->serial, 1115b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1116b206181dSStefan Haberland uid->vduit); 1117b206181dSStefan Haberland else 1118b206181dSStefan Haberland snprintf(print_path_uid, 1119b206181dSStefan Haberland sizeof(print_path_uid), 1120b206181dSStefan Haberland "%s.%s.%04x.%02x", 1121b206181dSStefan Haberland uid->vendor, uid->serial, 1122b206181dSStefan Haberland uid->ssid, 1123b206181dSStefan Haberland uid->real_unit_addr); 1124b206181dSStefan Haberland uid = &private->uid; 1125b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1126b206181dSStefan Haberland snprintf(print_device_uid, 1127b206181dSStefan Haberland sizeof(print_device_uid), 1128b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1129b206181dSStefan Haberland uid->vendor, uid->serial, 1130b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1131b206181dSStefan Haberland uid->vduit); 1132b206181dSStefan Haberland else 1133b206181dSStefan Haberland snprintf(print_device_uid, 1134b206181dSStefan Haberland sizeof(print_device_uid), 1135b206181dSStefan Haberland "%s.%s.%04x.%02x", 1136b206181dSStefan Haberland uid->vendor, uid->serial, 1137b206181dSStefan Haberland uid->ssid, 1138b206181dSStefan Haberland uid->real_unit_addr); 1139b206181dSStefan Haberland dev_err(&device->cdev->dev, 1140b206181dSStefan Haberland "Not all channel paths lead to " 1141b206181dSStefan Haberland "the same device, path %02X leads to " 1142b206181dSStefan Haberland "device %s instead of %s\n", lpm, 1143b206181dSStefan Haberland print_path_uid, print_device_uid); 114455d3a85cSStefan Haberland path_err = -EINVAL; 11455db8440cSStefan Haberland path_data->cablepm |= lpm; 114655d3a85cSStefan Haberland continue; 1147b206181dSStefan Haberland } 1148c7c0c9deSStefan Haberland pos = pathmask_to_pos(lpm); 1149c7c0c9deSStefan Haberland /* store per path conf_data */ 1150c7c0c9deSStefan Haberland private->path_conf_data[pos] = 1151c7c0c9deSStefan Haberland (struct dasd_conf_data *) conf_data; 1152b206181dSStefan Haberland path_private.conf_data = NULL; 1153b206181dSStefan Haberland path_private.conf_len = 0; 11541da177e4SLinus Torvalds } 11554abb08c2SStefan Weinhuber switch (dasd_eckd_path_access(conf_data, conf_len)) { 11561da177e4SLinus Torvalds case 0x02: 11571da177e4SLinus Torvalds path_data->npm |= lpm; 11581da177e4SLinus Torvalds break; 11591da177e4SLinus Torvalds case 0x03: 11601da177e4SLinus Torvalds path_data->ppm |= lpm; 11611da177e4SLinus Torvalds break; 11621da177e4SLinus Torvalds } 1163ccc0e7dcSStefan Haberland if (!path_data->opm) { 1164ccc0e7dcSStefan Haberland path_data->opm = lpm; 1165ccc0e7dcSStefan Haberland dasd_generic_path_operational(device); 1166ccc0e7dcSStefan Haberland } else { 1167a4d26c6aSStefan Weinhuber path_data->opm |= lpm; 1168ccc0e7dcSStefan Haberland } 11695db8440cSStefan Haberland /* 11705db8440cSStefan Haberland * if the path is used 11715db8440cSStefan Haberland * it should not be in one of the negative lists 11725db8440cSStefan Haberland */ 11735db8440cSStefan Haberland path_data->cablepm &= ~lpm; 11745db8440cSStefan Haberland path_data->hpfpm &= ~lpm; 11755db8440cSStefan Haberland path_data->cuirpm &= ~lpm; 11761da177e4SLinus Torvalds } 1177b206181dSStefan Haberland 117855d3a85cSStefan Haberland return path_err; 11791da177e4SLinus Torvalds } 11801da177e4SLinus Torvalds 1181a4d26c6aSStefan Weinhuber static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm) 1182a4d26c6aSStefan Weinhuber { 1183543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1184a4d26c6aSStefan Weinhuber int mdc; 1185a4d26c6aSStefan Weinhuber u32 fcx_max_data; 1186a4d26c6aSStefan Weinhuber 1187a4d26c6aSStefan Weinhuber if (private->fcx_max_data) { 1188a4d26c6aSStefan Weinhuber mdc = ccw_device_get_mdc(device->cdev, lpm); 1189a4d26c6aSStefan Weinhuber if ((mdc < 0)) { 1190a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1191a4d26c6aSStefan Weinhuber "Detecting the maximum data size for zHPF " 1192a4d26c6aSStefan Weinhuber "requests failed (rc=%d) for a new path %x\n", 1193a4d26c6aSStefan Weinhuber mdc, lpm); 1194a4d26c6aSStefan Weinhuber return mdc; 1195a4d26c6aSStefan Weinhuber } 1196a4d26c6aSStefan Weinhuber fcx_max_data = mdc * FCX_MAX_DATA_FACTOR; 1197a4d26c6aSStefan Weinhuber if (fcx_max_data < private->fcx_max_data) { 1198a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1199a4d26c6aSStefan Weinhuber "The maximum data size for zHPF requests %u " 1200a4d26c6aSStefan Weinhuber "on a new path %x is below the active maximum " 1201a4d26c6aSStefan Weinhuber "%u\n", fcx_max_data, lpm, 1202a4d26c6aSStefan Weinhuber private->fcx_max_data); 1203a4d26c6aSStefan Weinhuber return -EACCES; 1204a4d26c6aSStefan Weinhuber } 1205a4d26c6aSStefan Weinhuber } 1206a4d26c6aSStefan Weinhuber return 0; 1207a4d26c6aSStefan Weinhuber } 1208a4d26c6aSStefan Weinhuber 1209b206181dSStefan Haberland static int rebuild_device_uid(struct dasd_device *device, 1210b206181dSStefan Haberland struct path_verification_work_data *data) 1211b206181dSStefan Haberland { 1212543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1213543691a4SSebastian Ott struct dasd_path *path_data = &device->path_data; 1214543691a4SSebastian Ott __u8 lpm, opm = path_data->opm; 1215543691a4SSebastian Ott int rc = -ENODEV; 1216b206181dSStefan Haberland 1217b206181dSStefan Haberland for (lpm = 0x80; lpm; lpm >>= 1) { 1218b206181dSStefan Haberland if (!(lpm & opm)) 1219b206181dSStefan Haberland continue; 1220b206181dSStefan Haberland memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1221b206181dSStefan Haberland memset(&data->cqr, 0, sizeof(data->cqr)); 1222b206181dSStefan Haberland data->cqr.cpaddr = &data->ccw; 1223b206181dSStefan Haberland rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1224b206181dSStefan Haberland data->rcd_buffer, 1225b206181dSStefan Haberland lpm); 1226b206181dSStefan Haberland 1227b206181dSStefan Haberland if (rc) { 1228b206181dSStefan Haberland if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */ 1229b206181dSStefan Haberland continue; 1230b206181dSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1231b206181dSStefan Haberland "Read configuration data " 1232b206181dSStefan Haberland "returned error %d", rc); 1233b206181dSStefan Haberland break; 1234b206181dSStefan Haberland } 1235b206181dSStefan Haberland memcpy(private->conf_data, data->rcd_buffer, 1236b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE); 1237b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts(private)) { 1238b206181dSStefan Haberland rc = -ENODEV; 1239b206181dSStefan Haberland } else /* first valid path is enough */ 1240b206181dSStefan Haberland break; 1241b206181dSStefan Haberland } 1242b206181dSStefan Haberland 1243b206181dSStefan Haberland if (!rc) 1244b206181dSStefan Haberland rc = dasd_eckd_generate_uid(device); 1245b206181dSStefan Haberland 1246b206181dSStefan Haberland return rc; 1247b206181dSStefan Haberland } 1248b206181dSStefan Haberland 1249a4d26c6aSStefan Weinhuber static void do_path_verification_work(struct work_struct *work) 1250a4d26c6aSStefan Weinhuber { 1251a4d26c6aSStefan Weinhuber struct path_verification_work_data *data; 1252a4d26c6aSStefan Weinhuber struct dasd_device *device; 1253b206181dSStefan Haberland struct dasd_eckd_private path_private; 1254b206181dSStefan Haberland struct dasd_uid *uid; 1255b206181dSStefan Haberland __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE]; 12565db8440cSStefan Haberland __u8 lpm, opm, npm, ppm, epm, hpfpm, cablepm; 1257a4d26c6aSStefan Weinhuber unsigned long flags; 1258b206181dSStefan Haberland char print_uid[60]; 1259a4d26c6aSStefan Weinhuber int rc; 1260a4d26c6aSStefan Weinhuber 1261a4d26c6aSStefan Weinhuber data = container_of(work, struct path_verification_work_data, worker); 1262a4d26c6aSStefan Weinhuber device = data->device; 1263a4d26c6aSStefan Weinhuber 1264c8d1c0ffSStefan Haberland /* delay path verification until device was resumed */ 1265c8d1c0ffSStefan Haberland if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 1266c8d1c0ffSStefan Haberland schedule_work(work); 1267c8d1c0ffSStefan Haberland return; 1268c8d1c0ffSStefan Haberland } 12691eb38023SStefan Haberland /* check if path verification already running and delay if so */ 12701eb38023SStefan Haberland if (test_and_set_bit(DASD_FLAG_PATH_VERIFY, &device->flags)) { 12711eb38023SStefan Haberland schedule_work(work); 12721eb38023SStefan Haberland return; 12731eb38023SStefan Haberland } 1274a4d26c6aSStefan Weinhuber opm = 0; 1275a4d26c6aSStefan Weinhuber npm = 0; 1276a4d26c6aSStefan Weinhuber ppm = 0; 1277a4d26c6aSStefan Weinhuber epm = 0; 12785db8440cSStefan Haberland hpfpm = 0; 12795db8440cSStefan Haberland cablepm = 0; 12805db8440cSStefan Haberland 1281a4d26c6aSStefan Weinhuber for (lpm = 0x80; lpm; lpm >>= 1) { 1282b206181dSStefan Haberland if (!(lpm & data->tbvpm)) 1283b206181dSStefan Haberland continue; 1284b206181dSStefan Haberland memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1285a4d26c6aSStefan Weinhuber memset(&data->cqr, 0, sizeof(data->cqr)); 1286a4d26c6aSStefan Weinhuber data->cqr.cpaddr = &data->ccw; 1287a4d26c6aSStefan Weinhuber rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1288a4d26c6aSStefan Weinhuber data->rcd_buffer, 1289a4d26c6aSStefan Weinhuber lpm); 1290a4d26c6aSStefan Weinhuber if (!rc) { 1291a4d26c6aSStefan Weinhuber switch (dasd_eckd_path_access(data->rcd_buffer, 1292b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE) 1293b206181dSStefan Haberland ) { 1294a4d26c6aSStefan Weinhuber case 0x02: 1295a4d26c6aSStefan Weinhuber npm |= lpm; 1296a4d26c6aSStefan Weinhuber break; 1297a4d26c6aSStefan Weinhuber case 0x03: 1298a4d26c6aSStefan Weinhuber ppm |= lpm; 1299a4d26c6aSStefan Weinhuber break; 1300a4d26c6aSStefan Weinhuber } 1301a4d26c6aSStefan Weinhuber opm |= lpm; 1302a4d26c6aSStefan Weinhuber } else if (rc == -EOPNOTSUPP) { 1303a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1304a4d26c6aSStefan Weinhuber "path verification: No configuration " 1305a4d26c6aSStefan Weinhuber "data retrieved"); 1306a4d26c6aSStefan Weinhuber opm |= lpm; 1307a4d26c6aSStefan Weinhuber } else if (rc == -EAGAIN) { 1308a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1309a4d26c6aSStefan Weinhuber "path verification: device is stopped," 1310a4d26c6aSStefan Weinhuber " try again later"); 1311a4d26c6aSStefan Weinhuber epm |= lpm; 1312a4d26c6aSStefan Weinhuber } else { 1313a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1314a4d26c6aSStefan Weinhuber "Reading device feature codes failed " 1315a4d26c6aSStefan Weinhuber "(rc=%d) for new path %x\n", rc, lpm); 1316a4d26c6aSStefan Weinhuber continue; 1317a4d26c6aSStefan Weinhuber } 1318a4d26c6aSStefan Weinhuber if (verify_fcx_max_data(device, lpm)) { 1319a4d26c6aSStefan Weinhuber opm &= ~lpm; 1320a4d26c6aSStefan Weinhuber npm &= ~lpm; 1321a4d26c6aSStefan Weinhuber ppm &= ~lpm; 13225db8440cSStefan Haberland hpfpm |= lpm; 1323b206181dSStefan Haberland continue; 1324b206181dSStefan Haberland } 1325b206181dSStefan Haberland 1326b206181dSStefan Haberland /* 1327b206181dSStefan Haberland * save conf_data for comparison after 1328b206181dSStefan Haberland * rebuild_device_uid may have changed 1329b206181dSStefan Haberland * the original data 1330b206181dSStefan Haberland */ 1331b206181dSStefan Haberland memcpy(&path_rcd_buf, data->rcd_buffer, 1332b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE); 1333b206181dSStefan Haberland path_private.conf_data = (void *) &path_rcd_buf; 1334b206181dSStefan Haberland path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1335b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts(&path_private)) { 1336b206181dSStefan Haberland path_private.conf_data = NULL; 1337b206181dSStefan Haberland path_private.conf_len = 0; 1338b206181dSStefan Haberland continue; 1339b206181dSStefan Haberland } 1340b206181dSStefan Haberland 1341b206181dSStefan Haberland /* 1342b206181dSStefan Haberland * compare path UID with device UID only if at least 1343b206181dSStefan Haberland * one valid path is left 1344b206181dSStefan Haberland * in other case the device UID may have changed and 1345b206181dSStefan Haberland * the first working path UID will be used as device UID 1346b206181dSStefan Haberland */ 1347b206181dSStefan Haberland if (device->path_data.opm && 1348b206181dSStefan Haberland dasd_eckd_compare_path_uid(device, &path_private)) { 1349b206181dSStefan Haberland /* 1350b206181dSStefan Haberland * the comparison was not successful 1351b206181dSStefan Haberland * rebuild the device UID with at least one 1352b206181dSStefan Haberland * known path in case a z/VM hyperswap command 1353b206181dSStefan Haberland * has changed the device 1354b206181dSStefan Haberland * 1355b206181dSStefan Haberland * after this compare again 1356b206181dSStefan Haberland * 1357b206181dSStefan Haberland * if either the rebuild or the recompare fails 1358b206181dSStefan Haberland * the path can not be used 1359b206181dSStefan Haberland */ 1360b206181dSStefan Haberland if (rebuild_device_uid(device, data) || 1361b206181dSStefan Haberland dasd_eckd_compare_path_uid( 1362b206181dSStefan Haberland device, &path_private)) { 1363b206181dSStefan Haberland uid = &path_private.uid; 1364b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1365b206181dSStefan Haberland snprintf(print_uid, sizeof(print_uid), 1366b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1367b206181dSStefan Haberland uid->vendor, uid->serial, 1368b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1369b206181dSStefan Haberland uid->vduit); 1370b206181dSStefan Haberland else 1371b206181dSStefan Haberland snprintf(print_uid, sizeof(print_uid), 1372b206181dSStefan Haberland "%s.%s.%04x.%02x", 1373b206181dSStefan Haberland uid->vendor, uid->serial, 1374b206181dSStefan Haberland uid->ssid, 1375b206181dSStefan Haberland uid->real_unit_addr); 1376b206181dSStefan Haberland dev_err(&device->cdev->dev, 1377b206181dSStefan Haberland "The newly added channel path %02X " 1378b206181dSStefan Haberland "will not be used because it leads " 1379b206181dSStefan Haberland "to a different device %s\n", 1380b206181dSStefan Haberland lpm, print_uid); 1381b206181dSStefan Haberland opm &= ~lpm; 1382b206181dSStefan Haberland npm &= ~lpm; 1383b206181dSStefan Haberland ppm &= ~lpm; 13845db8440cSStefan Haberland cablepm |= lpm; 1385b206181dSStefan Haberland continue; 1386a4d26c6aSStefan Weinhuber } 1387a4d26c6aSStefan Weinhuber } 1388b206181dSStefan Haberland 1389a4d26c6aSStefan Weinhuber /* 1390a4d26c6aSStefan Weinhuber * There is a small chance that a path is lost again between 1391a4d26c6aSStefan Weinhuber * above path verification and the following modification of 1392a4d26c6aSStefan Weinhuber * the device opm mask. We could avoid that race here by using 1393a4d26c6aSStefan Weinhuber * yet another path mask, but we rather deal with this unlikely 1394a4d26c6aSStefan Weinhuber * situation in dasd_start_IO. 1395a4d26c6aSStefan Weinhuber */ 1396a4d26c6aSStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1397a4d26c6aSStefan Weinhuber if (!device->path_data.opm && opm) { 1398a4d26c6aSStefan Weinhuber device->path_data.opm = opm; 13995db8440cSStefan Haberland device->path_data.cablepm &= ~opm; 14005db8440cSStefan Haberland device->path_data.cuirpm &= ~opm; 14015db8440cSStefan Haberland device->path_data.hpfpm &= ~opm; 1402a4d26c6aSStefan Weinhuber dasd_generic_path_operational(device); 14035db8440cSStefan Haberland } else { 1404a4d26c6aSStefan Weinhuber device->path_data.opm |= opm; 14055db8440cSStefan Haberland device->path_data.cablepm &= ~opm; 14065db8440cSStefan Haberland device->path_data.cuirpm &= ~opm; 14075db8440cSStefan Haberland device->path_data.hpfpm &= ~opm; 14085db8440cSStefan Haberland } 1409a4d26c6aSStefan Weinhuber device->path_data.npm |= npm; 1410a4d26c6aSStefan Weinhuber device->path_data.ppm |= ppm; 1411a4d26c6aSStefan Weinhuber device->path_data.tbvpm |= epm; 14125db8440cSStefan Haberland device->path_data.cablepm |= cablepm; 14135db8440cSStefan Haberland device->path_data.hpfpm |= hpfpm; 1414a4d26c6aSStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1415b206181dSStefan Haberland } 14161eb38023SStefan Haberland clear_bit(DASD_FLAG_PATH_VERIFY, &device->flags); 1417a4d26c6aSStefan Weinhuber dasd_put_device(device); 1418a4d26c6aSStefan Weinhuber if (data->isglobal) 1419a4d26c6aSStefan Weinhuber mutex_unlock(&dasd_path_verification_mutex); 1420a4d26c6aSStefan Weinhuber else 1421a4d26c6aSStefan Weinhuber kfree(data); 1422a4d26c6aSStefan Weinhuber } 1423a4d26c6aSStefan Weinhuber 1424a4d26c6aSStefan Weinhuber static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm) 1425a4d26c6aSStefan Weinhuber { 1426a4d26c6aSStefan Weinhuber struct path_verification_work_data *data; 1427a4d26c6aSStefan Weinhuber 1428a4d26c6aSStefan Weinhuber data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA); 1429a4d26c6aSStefan Weinhuber if (!data) { 1430a4d26c6aSStefan Weinhuber if (mutex_trylock(&dasd_path_verification_mutex)) { 1431a4d26c6aSStefan Weinhuber data = path_verification_worker; 1432a4d26c6aSStefan Weinhuber data->isglobal = 1; 1433a4d26c6aSStefan Weinhuber } else 1434a4d26c6aSStefan Weinhuber return -ENOMEM; 1435a4d26c6aSStefan Weinhuber } else { 1436a4d26c6aSStefan Weinhuber memset(data, 0, sizeof(*data)); 1437a4d26c6aSStefan Weinhuber data->isglobal = 0; 1438a4d26c6aSStefan Weinhuber } 1439a4d26c6aSStefan Weinhuber INIT_WORK(&data->worker, do_path_verification_work); 1440a4d26c6aSStefan Weinhuber dasd_get_device(device); 1441a4d26c6aSStefan Weinhuber data->device = device; 1442a4d26c6aSStefan Weinhuber data->tbvpm = lpm; 1443a4d26c6aSStefan Weinhuber schedule_work(&data->worker); 1444a4d26c6aSStefan Weinhuber return 0; 1445a4d26c6aSStefan Weinhuber } 1446a4d26c6aSStefan Weinhuber 14478e09f215SStefan Weinhuber static int dasd_eckd_read_features(struct dasd_device *device) 14488e09f215SStefan Weinhuber { 1449543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 14508e09f215SStefan Weinhuber struct dasd_psf_prssd_data *prssdp; 14518e09f215SStefan Weinhuber struct dasd_rssd_features *features; 14528e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 14538e09f215SStefan Weinhuber struct ccw1 *ccw; 14548e09f215SStefan Weinhuber int rc; 14558e09f215SStefan Weinhuber 145668d1e5f0SStefan Weinhuber memset(&private->features, 0, sizeof(struct dasd_rssd_features)); 145768b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 14588e09f215SStefan Weinhuber (sizeof(struct dasd_psf_prssd_data) + 14598e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)), 14608e09f215SStefan Weinhuber device); 14618e09f215SStefan Weinhuber if (IS_ERR(cqr)) { 1462b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " 1463b8ed5dd5SStefan Haberland "allocate initialization request"); 14648e09f215SStefan Weinhuber return PTR_ERR(cqr); 14658e09f215SStefan Weinhuber } 14668e09f215SStefan Weinhuber cqr->startdev = device; 14678e09f215SStefan Weinhuber cqr->memdev = device; 14688e09f215SStefan Weinhuber cqr->block = NULL; 1469eb6e199bSStefan Weinhuber cqr->retries = 256; 14708e09f215SStefan Weinhuber cqr->expires = 10 * HZ; 14718e09f215SStefan Weinhuber 14728e09f215SStefan Weinhuber /* Prepare for Read Subsystem Data */ 14738e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 14748e09f215SStefan Weinhuber memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 14758e09f215SStefan Weinhuber prssdp->order = PSF_ORDER_PRSSD; 14768e09f215SStefan Weinhuber prssdp->suborder = 0x41; /* Read Feature Codes */ 14778e09f215SStefan Weinhuber /* all other bytes of prssdp must be zero */ 14788e09f215SStefan Weinhuber 14798e09f215SStefan Weinhuber ccw = cqr->cpaddr; 14808e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PSF; 14818e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_psf_prssd_data); 14828e09f215SStefan Weinhuber ccw->flags |= CCW_FLAG_CC; 14838e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) prssdp; 14848e09f215SStefan Weinhuber 14858e09f215SStefan Weinhuber /* Read Subsystem Data - feature codes */ 14868e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 14878e09f215SStefan Weinhuber memset(features, 0, sizeof(struct dasd_rssd_features)); 14888e09f215SStefan Weinhuber 14898e09f215SStefan Weinhuber ccw++; 14908e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RSSD; 14918e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_rssd_features); 14928e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) features; 14938e09f215SStefan Weinhuber 14941aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 14958e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 14968e09f215SStefan Weinhuber rc = dasd_sleep_on(cqr); 14978e09f215SStefan Weinhuber if (rc == 0) { 14988e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 14998e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 15008e09f215SStefan Weinhuber memcpy(&private->features, features, 15018e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)); 150268d1e5f0SStefan Weinhuber } else 150368d1e5f0SStefan Weinhuber dev_warn(&device->cdev->dev, "Reading device feature codes" 150468d1e5f0SStefan Weinhuber " failed with rc=%d\n", rc); 15058e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 15068e09f215SStefan Weinhuber return rc; 15078e09f215SStefan Weinhuber } 15088e09f215SStefan Weinhuber 15098e09f215SStefan Weinhuber 15103d052595SHorst Hummel /* 151140545573SHorst Hummel * Build CP for Perform Subsystem Function - SSC. 151240545573SHorst Hummel */ 1513f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, 1514f3eb5384SStefan Weinhuber int enable_pav) 151540545573SHorst Hummel { 151640545573SHorst Hummel struct dasd_ccw_req *cqr; 151740545573SHorst Hummel struct dasd_psf_ssc_data *psf_ssc_data; 151840545573SHorst Hummel struct ccw1 *ccw; 151940545573SHorst Hummel 152068b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 152140545573SHorst Hummel sizeof(struct dasd_psf_ssc_data), 152240545573SHorst Hummel device); 152340545573SHorst Hummel 152440545573SHorst Hummel if (IS_ERR(cqr)) { 1525fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 152640545573SHorst Hummel "Could not allocate PSF-SSC request"); 152740545573SHorst Hummel return cqr; 152840545573SHorst Hummel } 152940545573SHorst Hummel psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 153040545573SHorst Hummel psf_ssc_data->order = PSF_ORDER_SSC; 1531626350b6SStefan Weinhuber psf_ssc_data->suborder = 0xc0; 1532f3eb5384SStefan Weinhuber if (enable_pav) { 1533626350b6SStefan Weinhuber psf_ssc_data->suborder |= 0x08; 15348e09f215SStefan Weinhuber psf_ssc_data->reserved[0] = 0x88; 1535f3eb5384SStefan Weinhuber } 153640545573SHorst Hummel ccw = cqr->cpaddr; 153740545573SHorst Hummel ccw->cmd_code = DASD_ECKD_CCW_PSF; 153840545573SHorst Hummel ccw->cda = (__u32)(addr_t)psf_ssc_data; 153940545573SHorst Hummel ccw->count = 66; 154040545573SHorst Hummel 15418e09f215SStefan Weinhuber cqr->startdev = device; 15428e09f215SStefan Weinhuber cqr->memdev = device; 15438e09f215SStefan Weinhuber cqr->block = NULL; 1544eb6e199bSStefan Weinhuber cqr->retries = 256; 154540545573SHorst Hummel cqr->expires = 10*HZ; 15461aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 154740545573SHorst Hummel cqr->status = DASD_CQR_FILLED; 154840545573SHorst Hummel return cqr; 154940545573SHorst Hummel } 155040545573SHorst Hummel 155140545573SHorst Hummel /* 155240545573SHorst Hummel * Perform Subsystem Function. 155340545573SHorst Hummel * It is necessary to trigger CIO for channel revalidation since this 155440545573SHorst Hummel * call might change behaviour of DASD devices. 155540545573SHorst Hummel */ 155640545573SHorst Hummel static int 155712d7b107SStefan Haberland dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav, 155812d7b107SStefan Haberland unsigned long flags) 155940545573SHorst Hummel { 156040545573SHorst Hummel struct dasd_ccw_req *cqr; 156140545573SHorst Hummel int rc; 156240545573SHorst Hummel 1563f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_psf_ssc(device, enable_pav); 156440545573SHorst Hummel if (IS_ERR(cqr)) 156540545573SHorst Hummel return PTR_ERR(cqr); 156640545573SHorst Hummel 156712d7b107SStefan Haberland /* 156812d7b107SStefan Haberland * set flags e.g. turn on failfast, to prevent blocking 156912d7b107SStefan Haberland * the calling function should handle failed requests 157012d7b107SStefan Haberland */ 157112d7b107SStefan Haberland cqr->flags |= flags; 157212d7b107SStefan Haberland 157340545573SHorst Hummel rc = dasd_sleep_on(cqr); 157440545573SHorst Hummel if (!rc) 157540545573SHorst Hummel /* trigger CIO to reprobe devices */ 157640545573SHorst Hummel css_schedule_reprobe(); 157712d7b107SStefan Haberland else if (cqr->intrc == -EAGAIN) 157812d7b107SStefan Haberland rc = -EAGAIN; 157912d7b107SStefan Haberland 15808e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 158140545573SHorst Hummel return rc; 158240545573SHorst Hummel } 158340545573SHorst Hummel 158440545573SHorst Hummel /* 158540545573SHorst Hummel * Valide storage server of current device. 158640545573SHorst Hummel */ 158712d7b107SStefan Haberland static int dasd_eckd_validate_server(struct dasd_device *device, 158812d7b107SStefan Haberland unsigned long flags) 158940545573SHorst Hummel { 1590543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1591543691a4SSebastian Ott int enable_pav, rc; 159240545573SHorst Hummel 1593f9f8d02fSStefan Haberland if (private->uid.type == UA_BASE_PAV_ALIAS || 1594f9f8d02fSStefan Haberland private->uid.type == UA_HYPER_PAV_ALIAS) 159512d7b107SStefan Haberland return 0; 159640545573SHorst Hummel if (dasd_nopav || MACHINE_IS_VM) 1597f3eb5384SStefan Weinhuber enable_pav = 0; 1598f3eb5384SStefan Weinhuber else 1599f3eb5384SStefan Weinhuber enable_pav = 1; 160012d7b107SStefan Haberland rc = dasd_eckd_psf_ssc(device, enable_pav, flags); 1601eb6e199bSStefan Weinhuber 160240545573SHorst Hummel /* may be requested feature is not available on server, 160340545573SHorst Hummel * therefore just report error and go ahead */ 1604b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " 1605b8ed5dd5SStefan Haberland "returned rc=%d", private->uid.ssid, rc); 160612d7b107SStefan Haberland return rc; 160740545573SHorst Hummel } 160840545573SHorst Hummel 1609f1633031SStefan Haberland /* 1610f1633031SStefan Haberland * worker to do a validate server in case of a lost pathgroup 1611f1633031SStefan Haberland */ 1612f1633031SStefan Haberland static void dasd_eckd_do_validate_server(struct work_struct *work) 1613f1633031SStefan Haberland { 1614f1633031SStefan Haberland struct dasd_device *device = container_of(work, struct dasd_device, 1615f1633031SStefan Haberland kick_validate); 1616ea4da6eaSStefan Haberland unsigned long flags = 0; 1617ea4da6eaSStefan Haberland 1618ea4da6eaSStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &flags); 1619ea4da6eaSStefan Haberland if (dasd_eckd_validate_server(device, flags) 162012d7b107SStefan Haberland == -EAGAIN) { 162112d7b107SStefan Haberland /* schedule worker again if failed */ 162212d7b107SStefan Haberland schedule_work(&device->kick_validate); 162312d7b107SStefan Haberland return; 162412d7b107SStefan Haberland } 162512d7b107SStefan Haberland 1626f1633031SStefan Haberland dasd_put_device(device); 1627f1633031SStefan Haberland } 1628f1633031SStefan Haberland 1629f1633031SStefan Haberland static void dasd_eckd_kick_validate_server(struct dasd_device *device) 1630f1633031SStefan Haberland { 1631f1633031SStefan Haberland dasd_get_device(device); 163225e2cf1cSStefan Haberland /* exit if device not online or in offline processing */ 163325e2cf1cSStefan Haberland if (test_bit(DASD_FLAG_OFFLINE, &device->flags) || 163425e2cf1cSStefan Haberland device->state < DASD_STATE_ONLINE) { 163525e2cf1cSStefan Haberland dasd_put_device(device); 163625e2cf1cSStefan Haberland return; 163725e2cf1cSStefan Haberland } 1638f1633031SStefan Haberland /* queue call to do_validate_server to the kernel event daemon. */ 1639f2608cd4SStefan Haberland if (!schedule_work(&device->kick_validate)) 1640f2608cd4SStefan Haberland dasd_put_device(device); 1641f1633031SStefan Haberland } 1642f1633031SStefan Haberland 1643ef19298bSStefan Weinhuber static u32 get_fcx_max_data(struct dasd_device *device) 1644ef19298bSStefan Weinhuber { 1645543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1646ef19298bSStefan Weinhuber int fcx_in_css, fcx_in_gneq, fcx_in_features; 1647543691a4SSebastian Ott int tpm, mdc; 1648ef19298bSStefan Weinhuber 1649ef19298bSStefan Weinhuber if (dasd_nofcx) 1650ef19298bSStefan Weinhuber return 0; 1651ef19298bSStefan Weinhuber /* is transport mode supported? */ 1652ef19298bSStefan Weinhuber fcx_in_css = css_general_characteristics.fcx; 1653ef19298bSStefan Weinhuber fcx_in_gneq = private->gneq->reserved2[7] & 0x04; 1654ef19298bSStefan Weinhuber fcx_in_features = private->features.feature[40] & 0x80; 1655ef19298bSStefan Weinhuber tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; 1656ef19298bSStefan Weinhuber 1657ef19298bSStefan Weinhuber if (!tpm) 1658ef19298bSStefan Weinhuber return 0; 1659ef19298bSStefan Weinhuber 1660ef19298bSStefan Weinhuber mdc = ccw_device_get_mdc(device->cdev, 0); 1661ef19298bSStefan Weinhuber if (mdc < 0) { 1662ef19298bSStefan Weinhuber dev_warn(&device->cdev->dev, "Detecting the maximum supported" 1663ef19298bSStefan Weinhuber " data size for zHPF requests failed\n"); 1664ef19298bSStefan Weinhuber return 0; 1665ef19298bSStefan Weinhuber } else 1666ef19298bSStefan Weinhuber return mdc * FCX_MAX_DATA_FACTOR; 1667ef19298bSStefan Weinhuber } 1668ef19298bSStefan Weinhuber 166940545573SHorst Hummel /* 16703d052595SHorst Hummel * Check device characteristics. 16713d052595SHorst Hummel * If the device is accessible using ECKD discipline, the device is enabled. 16723d052595SHorst Hummel */ 16731da177e4SLinus Torvalds static int 16741da177e4SLinus Torvalds dasd_eckd_check_characteristics(struct dasd_device *device) 16751da177e4SLinus Torvalds { 1676543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 16778e09f215SStefan Weinhuber struct dasd_block *block; 16782dedf0d9SStefan Haberland struct dasd_uid temp_uid; 1679f9f8d02fSStefan Haberland int rc, i; 168033b62a30SStefan Weinhuber int readonly; 16817c8faa86SStefan Haberland unsigned long value; 16821da177e4SLinus Torvalds 1683f1633031SStefan Haberland /* setup work queue for validate server*/ 1684f1633031SStefan Haberland INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server); 168559a9ed5fSStefan Haberland /* setup work queue for summary unit check */ 168659a9ed5fSStefan Haberland INIT_WORK(&device->suc_work, dasd_alias_handle_summary_unit_check); 1687f1633031SStefan Haberland 1688454e1fa1SPeter Oberparleiter if (!ccw_device_is_pathgroup(device->cdev)) { 1689454e1fa1SPeter Oberparleiter dev_warn(&device->cdev->dev, 1690454e1fa1SPeter Oberparleiter "A channel path group could not be established\n"); 1691454e1fa1SPeter Oberparleiter return -EIO; 1692454e1fa1SPeter Oberparleiter } 1693454e1fa1SPeter Oberparleiter if (!ccw_device_is_multipath(device->cdev)) { 1694454e1fa1SPeter Oberparleiter dev_info(&device->cdev->dev, 1695454e1fa1SPeter Oberparleiter "The DASD is not operating in multipath mode\n"); 1696454e1fa1SPeter Oberparleiter } 169792636b15SSebastian Ott if (!private) { 169892636b15SSebastian Ott private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); 169992636b15SSebastian Ott if (!private) { 1700fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1701fc19f381SStefan Haberland "Allocating memory for private DASD data " 1702fc19f381SStefan Haberland "failed\n"); 17031da177e4SLinus Torvalds return -ENOMEM; 17041da177e4SLinus Torvalds } 1705543691a4SSebastian Ott device->private = private; 170692636b15SSebastian Ott } else { 170792636b15SSebastian Ott memset(private, 0, sizeof(*private)); 17081da177e4SLinus Torvalds } 17091da177e4SLinus Torvalds /* Invalidate status of initial analysis. */ 17101da177e4SLinus Torvalds private->init_cqr_status = -1; 17111da177e4SLinus Torvalds /* Set default cache operations. */ 17121da177e4SLinus Torvalds private->attrib.operation = DASD_NORMAL_CACHE; 17131da177e4SLinus Torvalds private->attrib.nr_cyl = 0; 17141da177e4SLinus Torvalds 171540545573SHorst Hummel /* Read Configuration Data */ 171640545573SHorst Hummel rc = dasd_eckd_read_conf(device); 171740545573SHorst Hummel if (rc) 17188e09f215SStefan Weinhuber goto out_err1; 171940545573SHorst Hummel 17207c8faa86SStefan Haberland /* set default timeout */ 17217c8faa86SStefan Haberland device->default_expires = DASD_EXPIRES; 17221f1ee9adSHannes Reinecke /* set default retry count */ 17231f1ee9adSHannes Reinecke device->default_retries = DASD_RETRIES; 17241f1ee9adSHannes Reinecke 17257c8faa86SStefan Haberland if (private->gneq) { 17267c8faa86SStefan Haberland value = 1; 17277c8faa86SStefan Haberland for (i = 0; i < private->gneq->timeout.value; i++) 17287c8faa86SStefan Haberland value = 10 * value; 17297c8faa86SStefan Haberland value = value * private->gneq->timeout.number; 17307c8faa86SStefan Haberland /* do not accept useless values */ 17317c8faa86SStefan Haberland if (value != 0 && value <= DASD_EXPIRES_MAX) 17327c8faa86SStefan Haberland device->default_expires = value; 17337c8faa86SStefan Haberland } 17347c8faa86SStefan Haberland 17352dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 17362dedf0d9SStefan Haberland if (temp_uid.type == UA_BASE_DEVICE) { 17378e09f215SStefan Weinhuber block = dasd_alloc_block(); 17388e09f215SStefan Weinhuber if (IS_ERR(block)) { 1739b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1740b8ed5dd5SStefan Haberland "could not allocate dasd " 1741b8ed5dd5SStefan Haberland "block structure"); 17428e09f215SStefan Weinhuber rc = PTR_ERR(block); 17438e09f215SStefan Weinhuber goto out_err1; 17448e09f215SStefan Weinhuber } 17458e09f215SStefan Weinhuber device->block = block; 17468e09f215SStefan Weinhuber block->base = device; 17478e09f215SStefan Weinhuber } 17488e09f215SStefan Weinhuber 1749f9f8d02fSStefan Haberland /* register lcu with alias handling, enable PAV */ 1750f9f8d02fSStefan Haberland rc = dasd_alias_make_device_known_to_lcu(device); 1751f9f8d02fSStefan Haberland if (rc) 17528e09f215SStefan Weinhuber goto out_err2; 1753f9f8d02fSStefan Haberland 175412d7b107SStefan Haberland dasd_eckd_validate_server(device, 0); 1755f4ac1d02SStefan Weinhuber 1756f4ac1d02SStefan Weinhuber /* device may report different configuration data after LCU setup */ 1757f4ac1d02SStefan Weinhuber rc = dasd_eckd_read_conf(device); 175840545573SHorst Hummel if (rc) 17598e09f215SStefan Weinhuber goto out_err3; 17608e09f215SStefan Weinhuber 17618e09f215SStefan Weinhuber /* Read Feature Codes */ 176268d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 176340545573SHorst Hummel 17641da177e4SLinus Torvalds /* Read Device Characteristics */ 176568b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 176668b781feSStefan Haberland &private->rdc_data, 64); 17678e09f215SStefan Weinhuber if (rc) { 1768b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1769b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 17708e09f215SStefan Weinhuber goto out_err3; 17718e09f215SStefan Weinhuber } 177234cd551aSStefan Haberland 177334cd551aSStefan Haberland if ((device->features & DASD_FEATURE_USERAW) && 177434cd551aSStefan Haberland !(private->rdc_data.facilities.RT_in_LR)) { 177534cd551aSStefan Haberland dev_err(&device->cdev->dev, "The storage server does not " 177634cd551aSStefan Haberland "support raw-track access\n"); 177734cd551aSStefan Haberland rc = -EINVAL; 177834cd551aSStefan Haberland goto out_err3; 177934cd551aSStefan Haberland } 178034cd551aSStefan Haberland 1781817f2c84SNikanth Karthikesan /* find the valid cylinder size */ 1782b44b0ab3SStefan Weinhuber if (private->rdc_data.no_cyl == LV_COMPAT_CYL && 1783b44b0ab3SStefan Weinhuber private->rdc_data.long_no_cyl) 1784b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.long_no_cyl; 1785b44b0ab3SStefan Weinhuber else 1786b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.no_cyl; 1787b44b0ab3SStefan Weinhuber 1788ef19298bSStefan Weinhuber private->fcx_max_data = get_fcx_max_data(device); 1789ef19298bSStefan Weinhuber 179033b62a30SStefan Weinhuber readonly = dasd_device_is_ro(device); 179133b62a30SStefan Weinhuber if (readonly) 179233b62a30SStefan Weinhuber set_bit(DASD_FLAG_DEVICE_RO, &device->flags); 179333b62a30SStefan Weinhuber 1794fc19f381SStefan Haberland dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " 179533b62a30SStefan Weinhuber "with %d cylinders, %d heads, %d sectors%s\n", 17961da177e4SLinus Torvalds private->rdc_data.dev_type, 17971da177e4SLinus Torvalds private->rdc_data.dev_model, 17981da177e4SLinus Torvalds private->rdc_data.cu_type, 17991da177e4SLinus Torvalds private->rdc_data.cu_model.model, 1800b44b0ab3SStefan Weinhuber private->real_cyl, 18011da177e4SLinus Torvalds private->rdc_data.trk_per_cyl, 180233b62a30SStefan Weinhuber private->rdc_data.sec_per_trk, 180333b62a30SStefan Weinhuber readonly ? ", read-only device" : ""); 18048e09f215SStefan Weinhuber return 0; 18058e09f215SStefan Weinhuber 18068e09f215SStefan Weinhuber out_err3: 18078e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 18088e09f215SStefan Weinhuber out_err2: 18098e09f215SStefan Weinhuber dasd_free_block(device->block); 18108e09f215SStefan Weinhuber device->block = NULL; 18118e09f215SStefan Weinhuber out_err1: 18124abb08c2SStefan Weinhuber kfree(private->conf_data); 18138e09f215SStefan Weinhuber kfree(device->private); 18148e09f215SStefan Weinhuber device->private = NULL; 18153d052595SHorst Hummel return rc; 18161da177e4SLinus Torvalds } 18171da177e4SLinus Torvalds 18188e09f215SStefan Weinhuber static void dasd_eckd_uncheck_device(struct dasd_device *device) 18198e09f215SStefan Weinhuber { 1820543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1821b179b037SStefan Haberland int i; 18224abb08c2SStefan Weinhuber 18238e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 18244abb08c2SStefan Weinhuber private->ned = NULL; 18254abb08c2SStefan Weinhuber private->sneq = NULL; 18264abb08c2SStefan Weinhuber private->vdsneq = NULL; 18274abb08c2SStefan Weinhuber private->gneq = NULL; 18284abb08c2SStefan Weinhuber private->conf_len = 0; 1829b179b037SStefan Haberland for (i = 0; i < 8; i++) { 1830b179b037SStefan Haberland kfree(private->path_conf_data[i]); 1831b179b037SStefan Haberland if ((__u8 *)private->path_conf_data[i] == 1832b179b037SStefan Haberland private->conf_data) { 1833b179b037SStefan Haberland private->conf_data = NULL; 1834b179b037SStefan Haberland private->conf_len = 0; 1835b179b037SStefan Haberland } 1836b179b037SStefan Haberland private->path_conf_data[i] = NULL; 1837b179b037SStefan Haberland } 18384abb08c2SStefan Weinhuber kfree(private->conf_data); 18394abb08c2SStefan Weinhuber private->conf_data = NULL; 18408e09f215SStefan Weinhuber } 18418e09f215SStefan Weinhuber 18421da177e4SLinus Torvalds static struct dasd_ccw_req * 18431da177e4SLinus Torvalds dasd_eckd_analysis_ccw(struct dasd_device *device) 18441da177e4SLinus Torvalds { 1845543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 18461da177e4SLinus Torvalds struct eckd_count *count_data; 18471da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 18481da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 18491da177e4SLinus Torvalds struct ccw1 *ccw; 18501da177e4SLinus Torvalds int cplength, datasize; 18511da177e4SLinus Torvalds int i; 18521da177e4SLinus Torvalds 18531da177e4SLinus Torvalds cplength = 8; 18541da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 185568b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 18561da177e4SLinus Torvalds if (IS_ERR(cqr)) 18571da177e4SLinus Torvalds return cqr; 18581da177e4SLinus Torvalds ccw = cqr->cpaddr; 18591da177e4SLinus Torvalds /* Define extent for the first 3 tracks. */ 18601da177e4SLinus Torvalds define_extent(ccw++, cqr->data, 0, 2, 18611da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device); 18621da177e4SLinus Torvalds LO_data = cqr->data + sizeof(struct DE_eckd_data); 18631da177e4SLinus Torvalds /* Locate record for the first 4 records on track 0. */ 18641da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18651da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 0, 0, 4, 18661da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 18671da177e4SLinus Torvalds 18681da177e4SLinus Torvalds count_data = private->count_area; 18691da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 18701da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18711da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 18721da177e4SLinus Torvalds ccw->flags = 0; 18731da177e4SLinus Torvalds ccw->count = 8; 18741da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 18751da177e4SLinus Torvalds ccw++; 18761da177e4SLinus Torvalds count_data++; 18771da177e4SLinus Torvalds } 18781da177e4SLinus Torvalds 18791da177e4SLinus Torvalds /* Locate record for the first record on track 2. */ 18801da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18811da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 2, 0, 1, 18821da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 18831da177e4SLinus Torvalds /* Read count ccw. */ 18841da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18851da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 18861da177e4SLinus Torvalds ccw->flags = 0; 18871da177e4SLinus Torvalds ccw->count = 8; 18881da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 18891da177e4SLinus Torvalds 18908e09f215SStefan Weinhuber cqr->block = NULL; 18918e09f215SStefan Weinhuber cqr->startdev = device; 18928e09f215SStefan Weinhuber cqr->memdev = device; 1893eb6e199bSStefan Weinhuber cqr->retries = 255; 18941aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 18951da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 18961da177e4SLinus Torvalds return cqr; 18971da177e4SLinus Torvalds } 18981da177e4SLinus Torvalds 1899eb6e199bSStefan Weinhuber /* differentiate between 'no record found' and any other error */ 1900eb6e199bSStefan Weinhuber static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) 1901eb6e199bSStefan Weinhuber { 1902eb6e199bSStefan Weinhuber char *sense; 1903eb6e199bSStefan Weinhuber if (init_cqr->status == DASD_CQR_DONE) 1904eb6e199bSStefan Weinhuber return INIT_CQR_OK; 1905eb6e199bSStefan Weinhuber else if (init_cqr->status == DASD_CQR_NEED_ERP || 1906eb6e199bSStefan Weinhuber init_cqr->status == DASD_CQR_FAILED) { 1907eb6e199bSStefan Weinhuber sense = dasd_get_sense(&init_cqr->irb); 1908eb6e199bSStefan Weinhuber if (sense && (sense[1] & SNS1_NO_REC_FOUND)) 1909eb6e199bSStefan Weinhuber return INIT_CQR_UNFORMATTED; 1910eb6e199bSStefan Weinhuber else 1911eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 1912eb6e199bSStefan Weinhuber } else 1913eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 1914eb6e199bSStefan Weinhuber } 1915eb6e199bSStefan Weinhuber 19161da177e4SLinus Torvalds /* 19171da177e4SLinus Torvalds * This is the callback function for the init_analysis cqr. It saves 19181da177e4SLinus Torvalds * the status of the initial analysis ccw before it frees it and kicks 19191da177e4SLinus Torvalds * the device to continue the startup sequence. This will call 19201da177e4SLinus Torvalds * dasd_eckd_do_analysis again (if the devices has not been marked 19211da177e4SLinus Torvalds * for deletion in the meantime). 19221da177e4SLinus Torvalds */ 1923eb6e199bSStefan Weinhuber static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, 1924eb6e199bSStefan Weinhuber void *data) 19251da177e4SLinus Torvalds { 1926543691a4SSebastian Ott struct dasd_device *device = init_cqr->startdev; 1927543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 19281da177e4SLinus Torvalds 1929eb6e199bSStefan Weinhuber private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); 19301da177e4SLinus Torvalds dasd_sfree_request(init_cqr, device); 19311da177e4SLinus Torvalds dasd_kick_device(device); 19321da177e4SLinus Torvalds } 19331da177e4SLinus Torvalds 1934eb6e199bSStefan Weinhuber static int dasd_eckd_start_analysis(struct dasd_block *block) 19351da177e4SLinus Torvalds { 19361da177e4SLinus Torvalds struct dasd_ccw_req *init_cqr; 19371da177e4SLinus Torvalds 19388e09f215SStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(block->base); 19391da177e4SLinus Torvalds if (IS_ERR(init_cqr)) 19401da177e4SLinus Torvalds return PTR_ERR(init_cqr); 19411da177e4SLinus Torvalds init_cqr->callback = dasd_eckd_analysis_callback; 19421da177e4SLinus Torvalds init_cqr->callback_data = NULL; 19431da177e4SLinus Torvalds init_cqr->expires = 5*HZ; 1944eb6e199bSStefan Weinhuber /* first try without ERP, so we can later handle unformatted 1945eb6e199bSStefan Weinhuber * devices as special case 1946eb6e199bSStefan Weinhuber */ 1947eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); 1948eb6e199bSStefan Weinhuber init_cqr->retries = 0; 19491da177e4SLinus Torvalds dasd_add_request_head(init_cqr); 19501da177e4SLinus Torvalds return -EAGAIN; 19511da177e4SLinus Torvalds } 19521da177e4SLinus Torvalds 1953eb6e199bSStefan Weinhuber static int dasd_eckd_end_analysis(struct dasd_block *block) 19541da177e4SLinus Torvalds { 1955543691a4SSebastian Ott struct dasd_device *device = block->base; 1956543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 19571da177e4SLinus Torvalds struct eckd_count *count_area; 19581da177e4SLinus Torvalds unsigned int sb, blk_per_trk; 19591da177e4SLinus Torvalds int status, i; 1960eb6e199bSStefan Weinhuber struct dasd_ccw_req *init_cqr; 19611da177e4SLinus Torvalds 19621da177e4SLinus Torvalds status = private->init_cqr_status; 19631da177e4SLinus Torvalds private->init_cqr_status = -1; 1964eb6e199bSStefan Weinhuber if (status == INIT_CQR_ERROR) { 1965eb6e199bSStefan Weinhuber /* try again, this time with full ERP */ 1966eb6e199bSStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(device); 1967eb6e199bSStefan Weinhuber dasd_sleep_on(init_cqr); 1968eb6e199bSStefan Weinhuber status = dasd_eckd_analysis_evaluation(init_cqr); 1969eb6e199bSStefan Weinhuber dasd_sfree_request(init_cqr, device); 1970eb6e199bSStefan Weinhuber } 1971eb6e199bSStefan Weinhuber 1972e4dbb0f2SStefan Haberland if (device->features & DASD_FEATURE_USERAW) { 1973e4dbb0f2SStefan Haberland block->bp_block = DASD_RAW_BLOCKSIZE; 1974e4dbb0f2SStefan Haberland blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; 1975e4dbb0f2SStefan Haberland block->s2b_shift = 3; 1976e4dbb0f2SStefan Haberland goto raw; 1977e4dbb0f2SStefan Haberland } 1978e4dbb0f2SStefan Haberland 1979eb6e199bSStefan Weinhuber if (status == INIT_CQR_UNFORMATTED) { 1980eb6e199bSStefan Weinhuber dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); 19811da177e4SLinus Torvalds return -EMEDIUMTYPE; 1982eb6e199bSStefan Weinhuber } else if (status == INIT_CQR_ERROR) { 1983eb6e199bSStefan Weinhuber dev_err(&device->cdev->dev, 1984eb6e199bSStefan Weinhuber "Detecting the DASD disk layout failed because " 1985eb6e199bSStefan Weinhuber "of an I/O error\n"); 1986eb6e199bSStefan Weinhuber return -EIO; 19871da177e4SLinus Torvalds } 19881da177e4SLinus Torvalds 19891da177e4SLinus Torvalds private->uses_cdl = 1; 19901da177e4SLinus Torvalds /* Check Track 0 for Compatible Disk Layout */ 19911da177e4SLinus Torvalds count_area = NULL; 19921da177e4SLinus Torvalds for (i = 0; i < 3; i++) { 19931da177e4SLinus Torvalds if (private->count_area[i].kl != 4 || 19943bc9fef9SStefan Haberland private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 || 19953bc9fef9SStefan Haberland private->count_area[i].cyl != 0 || 19963bc9fef9SStefan Haberland private->count_area[i].head != count_area_head[i] || 19973bc9fef9SStefan Haberland private->count_area[i].record != count_area_rec[i]) { 19981da177e4SLinus Torvalds private->uses_cdl = 0; 19991da177e4SLinus Torvalds break; 20001da177e4SLinus Torvalds } 20011da177e4SLinus Torvalds } 20021da177e4SLinus Torvalds if (i == 3) 20031da177e4SLinus Torvalds count_area = &private->count_area[4]; 20041da177e4SLinus Torvalds 20051da177e4SLinus Torvalds if (private->uses_cdl == 0) { 20061da177e4SLinus Torvalds for (i = 0; i < 5; i++) { 20071da177e4SLinus Torvalds if ((private->count_area[i].kl != 0) || 20081da177e4SLinus Torvalds (private->count_area[i].dl != 20093bc9fef9SStefan Haberland private->count_area[0].dl) || 20103bc9fef9SStefan Haberland private->count_area[i].cyl != 0 || 20113bc9fef9SStefan Haberland private->count_area[i].head != count_area_head[i] || 20123bc9fef9SStefan Haberland private->count_area[i].record != count_area_rec[i]) 20131da177e4SLinus Torvalds break; 20141da177e4SLinus Torvalds } 20151da177e4SLinus Torvalds if (i == 5) 20161da177e4SLinus Torvalds count_area = &private->count_area[0]; 20171da177e4SLinus Torvalds } else { 20181da177e4SLinus Torvalds if (private->count_area[3].record == 1) 2019fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 2020fc19f381SStefan Haberland "Track 0 has no records following the VTOC\n"); 20211da177e4SLinus Torvalds } 2022e4dbb0f2SStefan Haberland 20231da177e4SLinus Torvalds if (count_area != NULL && count_area->kl == 0) { 20241da177e4SLinus Torvalds /* we found notthing violating our disk layout */ 20251da177e4SLinus Torvalds if (dasd_check_blocksize(count_area->dl) == 0) 20268e09f215SStefan Weinhuber block->bp_block = count_area->dl; 20271da177e4SLinus Torvalds } 20288e09f215SStefan Weinhuber if (block->bp_block == 0) { 2029fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 2030fc19f381SStefan Haberland "The disk layout of the DASD is not supported\n"); 20311da177e4SLinus Torvalds return -EMEDIUMTYPE; 20321da177e4SLinus Torvalds } 20338e09f215SStefan Weinhuber block->s2b_shift = 0; /* bits to shift 512 to get a block */ 20348e09f215SStefan Weinhuber for (sb = 512; sb < block->bp_block; sb = sb << 1) 20358e09f215SStefan Weinhuber block->s2b_shift++; 20361da177e4SLinus Torvalds 20378e09f215SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 2038e4dbb0f2SStefan Haberland 2039e4dbb0f2SStefan Haberland raw: 2040b44b0ab3SStefan Weinhuber block->blocks = (private->real_cyl * 20411da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 20421da177e4SLinus Torvalds blk_per_trk); 20431da177e4SLinus Torvalds 2044fc19f381SStefan Haberland dev_info(&device->cdev->dev, 2045fc19f381SStefan Haberland "DASD with %d KB/block, %d KB total size, %d KB/track, " 2046fc19f381SStefan Haberland "%s\n", (block->bp_block >> 10), 2047b44b0ab3SStefan Weinhuber ((private->real_cyl * 20481da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 20498e09f215SStefan Weinhuber blk_per_trk * (block->bp_block >> 9)) >> 1), 20508e09f215SStefan Weinhuber ((blk_per_trk * block->bp_block) >> 10), 20511da177e4SLinus Torvalds private->uses_cdl ? 20521da177e4SLinus Torvalds "compatible disk layout" : "linux disk layout"); 20531da177e4SLinus Torvalds 20541da177e4SLinus Torvalds return 0; 20551da177e4SLinus Torvalds } 20561da177e4SLinus Torvalds 20578e09f215SStefan Weinhuber static int dasd_eckd_do_analysis(struct dasd_block *block) 20581da177e4SLinus Torvalds { 2059543691a4SSebastian Ott struct dasd_eckd_private *private = block->base->private; 20601da177e4SLinus Torvalds 20611da177e4SLinus Torvalds if (private->init_cqr_status < 0) 20628e09f215SStefan Weinhuber return dasd_eckd_start_analysis(block); 20631da177e4SLinus Torvalds else 20648e09f215SStefan Weinhuber return dasd_eckd_end_analysis(block); 20651da177e4SLinus Torvalds } 20661da177e4SLinus Torvalds 2067d42e1712SStefan Haberland static int dasd_eckd_basic_to_ready(struct dasd_device *device) 20688e09f215SStefan Weinhuber { 20698e09f215SStefan Weinhuber return dasd_alias_add_device(device); 20708e09f215SStefan Weinhuber }; 20718e09f215SStefan Weinhuber 20728e09f215SStefan Weinhuber static int dasd_eckd_online_to_ready(struct dasd_device *device) 20738e09f215SStefan Weinhuber { 2074501183f2SStefan Haberland cancel_work_sync(&device->reload_device); 207525e2cf1cSStefan Haberland cancel_work_sync(&device->kick_validate); 2076d42e1712SStefan Haberland return 0; 2077d42e1712SStefan Haberland }; 2078d42e1712SStefan Haberland 2079daa991bfSStefan Haberland static int dasd_eckd_basic_to_known(struct dasd_device *device) 2080d42e1712SStefan Haberland { 20818e09f215SStefan Weinhuber return dasd_alias_remove_device(device); 20828e09f215SStefan Weinhuber }; 20838e09f215SStefan Weinhuber 20841da177e4SLinus Torvalds static int 20858e09f215SStefan Weinhuber dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 20861da177e4SLinus Torvalds { 2087543691a4SSebastian Ott struct dasd_eckd_private *private = block->base->private; 20881da177e4SLinus Torvalds 20898e09f215SStefan Weinhuber if (dasd_check_blocksize(block->bp_block) == 0) { 20901da177e4SLinus Torvalds geo->sectors = recs_per_track(&private->rdc_data, 20918e09f215SStefan Weinhuber 0, block->bp_block); 20921da177e4SLinus Torvalds } 20931da177e4SLinus Torvalds geo->cylinders = private->rdc_data.no_cyl; 20941da177e4SLinus Torvalds geo->heads = private->rdc_data.trk_per_cyl; 20951da177e4SLinus Torvalds return 0; 20961da177e4SLinus Torvalds } 20971da177e4SLinus Torvalds 20981da177e4SLinus Torvalds static struct dasd_ccw_req * 2099d42e1712SStefan Haberland dasd_eckd_build_format(struct dasd_device *base, 210029b8dd9dSStefan Haberland struct format_data_t *fdata, 2101a94fa154SStefan Haberland int enable_pav) 21021da177e4SLinus Torvalds { 2103d42e1712SStefan Haberland struct dasd_eckd_private *base_priv; 2104d42e1712SStefan Haberland struct dasd_eckd_private *start_priv; 210529b8dd9dSStefan Haberland struct dasd_device *startdev = NULL; 21061da177e4SLinus Torvalds struct dasd_ccw_req *fcp; 21071da177e4SLinus Torvalds struct eckd_count *ect; 2108d42e1712SStefan Haberland struct ch_t address; 21091da177e4SLinus Torvalds struct ccw1 *ccw; 21101da177e4SLinus Torvalds void *data; 2111b44b0ab3SStefan Weinhuber int rpt; 21121da177e4SLinus Torvalds int cplength, datasize; 2113d42e1712SStefan Haberland int i, j; 2114f9a28f7bSJean-Baptiste Joret int intensity = 0; 2115f9a28f7bSJean-Baptiste Joret int r0_perm; 2116d42e1712SStefan Haberland int nr_tracks; 211718d6624eSStefan Haberland int use_prefix; 21181da177e4SLinus Torvalds 2119a94fa154SStefan Haberland if (enable_pav) 2120d42e1712SStefan Haberland startdev = dasd_alias_get_start_dev(base); 212129b8dd9dSStefan Haberland 2122d42e1712SStefan Haberland if (!startdev) 2123d42e1712SStefan Haberland startdev = base; 21241da177e4SLinus Torvalds 2125543691a4SSebastian Ott start_priv = startdev->private; 2126543691a4SSebastian Ott base_priv = base->private; 2127d42e1712SStefan Haberland 2128d42e1712SStefan Haberland rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize); 2129d42e1712SStefan Haberland 2130d42e1712SStefan Haberland nr_tracks = fdata->stop_unit - fdata->start_unit + 1; 21311da177e4SLinus Torvalds 21321da177e4SLinus Torvalds /* 21331da177e4SLinus Torvalds * fdata->intensity is a bit string that tells us what to do: 21341da177e4SLinus Torvalds * Bit 0: write record zero 21351da177e4SLinus Torvalds * Bit 1: write home address, currently not supported 21361da177e4SLinus Torvalds * Bit 2: invalidate tracks 21371da177e4SLinus Torvalds * Bit 3: use OS/390 compatible disk layout (cdl) 2138f9a28f7bSJean-Baptiste Joret * Bit 4: do not allow storage subsystem to modify record zero 21391da177e4SLinus Torvalds * Only some bit combinations do make sense. 21401da177e4SLinus Torvalds */ 2141f9a28f7bSJean-Baptiste Joret if (fdata->intensity & 0x10) { 2142f9a28f7bSJean-Baptiste Joret r0_perm = 0; 2143f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity & ~0x10; 2144f9a28f7bSJean-Baptiste Joret } else { 2145f9a28f7bSJean-Baptiste Joret r0_perm = 1; 2146f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity; 2147f9a28f7bSJean-Baptiste Joret } 2148d42e1712SStefan Haberland 214918d6624eSStefan Haberland use_prefix = base_priv->features.feature[8] & 0x01; 215018d6624eSStefan Haberland 2151f9a28f7bSJean-Baptiste Joret switch (intensity) { 21521da177e4SLinus Torvalds case 0x00: /* Normal format */ 21531da177e4SLinus Torvalds case 0x08: /* Normal format, use cdl. */ 2154d42e1712SStefan Haberland cplength = 2 + (rpt*nr_tracks); 215518d6624eSStefan Haberland if (use_prefix) 2156d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 21571da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 2158d42e1712SStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 215918d6624eSStefan Haberland else 216018d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 216118d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 216218d6624eSStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 21631da177e4SLinus Torvalds break; 21641da177e4SLinus Torvalds case 0x01: /* Write record zero and format track. */ 21651da177e4SLinus Torvalds case 0x09: /* Write record zero and format track, use cdl. */ 2166d42e1712SStefan Haberland cplength = 2 + rpt * nr_tracks; 216718d6624eSStefan Haberland if (use_prefix) 2168d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 21691da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 21701da177e4SLinus Torvalds sizeof(struct eckd_count) + 2171d42e1712SStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 217218d6624eSStefan Haberland else 217318d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 217418d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 217518d6624eSStefan Haberland sizeof(struct eckd_count) + 217618d6624eSStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 21771da177e4SLinus Torvalds break; 21781da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 21791da177e4SLinus Torvalds case 0x0c: /* Invalidate track, use cdl. */ 21801da177e4SLinus Torvalds cplength = 3; 218118d6624eSStefan Haberland if (use_prefix) 2182d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 21831da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 21841da177e4SLinus Torvalds sizeof(struct eckd_count); 218518d6624eSStefan Haberland else 218618d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 218718d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 218818d6624eSStefan Haberland sizeof(struct eckd_count); 21891da177e4SLinus Torvalds break; 21901da177e4SLinus Torvalds default: 2191d42e1712SStefan Haberland dev_warn(&startdev->cdev->dev, 2192d42e1712SStefan Haberland "An I/O control call used incorrect flags 0x%x\n", 2193d42e1712SStefan Haberland fdata->intensity); 21941da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 21951da177e4SLinus Torvalds } 21961da177e4SLinus Torvalds /* Allocate the format ccw request. */ 2197d42e1712SStefan Haberland fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 2198d42e1712SStefan Haberland datasize, startdev); 21991da177e4SLinus Torvalds if (IS_ERR(fcp)) 22001da177e4SLinus Torvalds return fcp; 22011da177e4SLinus Torvalds 2202d42e1712SStefan Haberland start_priv->count++; 22031da177e4SLinus Torvalds data = fcp->data; 22041da177e4SLinus Torvalds ccw = fcp->cpaddr; 22051da177e4SLinus Torvalds 2206f9a28f7bSJean-Baptiste Joret switch (intensity & ~0x08) { 22071da177e4SLinus Torvalds case 0x00: /* Normal format. */ 220818d6624eSStefan Haberland if (use_prefix) { 2209d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2210d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 2211d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2212f9a28f7bSJean-Baptiste Joret /* grant subsystem permission to format R0 */ 2213f9a28f7bSJean-Baptiste Joret if (r0_perm) 2214d42e1712SStefan Haberland ((struct PFX_eckd_data *)data) 2215d42e1712SStefan Haberland ->define_extent.ga_extended |= 0x04; 2216d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 221718d6624eSStefan Haberland } else { 221818d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 221918d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 222018d6624eSStefan Haberland DASD_ECKD_CCW_WRITE_CKD, startdev); 222118d6624eSStefan Haberland /* grant subsystem permission to format R0 */ 222218d6624eSStefan Haberland if (r0_perm) 222318d6624eSStefan Haberland ((struct DE_eckd_data *) data) 222418d6624eSStefan Haberland ->ga_extended |= 0x04; 222518d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 222618d6624eSStefan Haberland } 22271da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 22281da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 2229d42e1712SStefan Haberland fdata->start_unit, 0, rpt*nr_tracks, 2230d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, 22311da177e4SLinus Torvalds fdata->blksize); 22321da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 22331da177e4SLinus Torvalds break; 22341da177e4SLinus Torvalds case 0x01: /* Write record zero + format track. */ 223518d6624eSStefan Haberland if (use_prefix) { 2236d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2237d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 22381da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, 2239d42e1712SStefan Haberland base, startdev); 2240d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 224118d6624eSStefan Haberland } else { 224218d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 224318d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 224418d6624eSStefan Haberland DASD_ECKD_CCW_WRITE_RECORD_ZERO, startdev); 224518d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 224618d6624eSStefan Haberland } 22471da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 22481da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 2249d42e1712SStefan Haberland fdata->start_unit, 0, rpt * nr_tracks + 1, 2250d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_RECORD_ZERO, base, 2251d42e1712SStefan Haberland base->block->bp_block); 22521da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 22531da177e4SLinus Torvalds break; 22541da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 225518d6624eSStefan Haberland if (use_prefix) { 2256d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2257d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 2258d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2259d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 226018d6624eSStefan Haberland } else { 226118d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 226218d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 226318d6624eSStefan Haberland DASD_ECKD_CCW_WRITE_CKD, startdev); 226418d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 226518d6624eSStefan Haberland } 22661da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 22671da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 22681da177e4SLinus Torvalds fdata->start_unit, 0, 1, 2269d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, 8); 22701da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 22711da177e4SLinus Torvalds break; 22721da177e4SLinus Torvalds } 2273d42e1712SStefan Haberland 2274d42e1712SStefan Haberland for (j = 0; j < nr_tracks; j++) { 2275d42e1712SStefan Haberland /* calculate cylinder and head for the current track */ 2276d42e1712SStefan Haberland set_ch_t(&address, 2277d42e1712SStefan Haberland (fdata->start_unit + j) / 2278d42e1712SStefan Haberland base_priv->rdc_data.trk_per_cyl, 2279d42e1712SStefan Haberland (fdata->start_unit + j) % 2280d42e1712SStefan Haberland base_priv->rdc_data.trk_per_cyl); 2281f9a28f7bSJean-Baptiste Joret if (intensity & 0x01) { /* write record zero */ 22821da177e4SLinus Torvalds ect = (struct eckd_count *) data; 22831da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2284b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2285b44b0ab3SStefan Weinhuber ect->head = address.head; 22861da177e4SLinus Torvalds ect->record = 0; 22871da177e4SLinus Torvalds ect->kl = 0; 22881da177e4SLinus Torvalds ect->dl = 8; 22891da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 22901da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 22911da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 22921da177e4SLinus Torvalds ccw->count = 8; 22931da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 22941da177e4SLinus Torvalds ccw++; 22951da177e4SLinus Torvalds } 2296f9a28f7bSJean-Baptiste Joret if ((intensity & ~0x08) & 0x04) { /* erase track */ 22971da177e4SLinus Torvalds ect = (struct eckd_count *) data; 22981da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2299b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2300b44b0ab3SStefan Weinhuber ect->head = address.head; 23011da177e4SLinus Torvalds ect->record = 1; 23021da177e4SLinus Torvalds ect->kl = 0; 23031da177e4SLinus Torvalds ect->dl = 0; 23041da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 23051da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 23061da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 23071da177e4SLinus Torvalds ccw->count = 8; 23081da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 23091da177e4SLinus Torvalds } else { /* write remaining records */ 23101da177e4SLinus Torvalds for (i = 0; i < rpt; i++) { 23111da177e4SLinus Torvalds ect = (struct eckd_count *) data; 23121da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2313b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2314b44b0ab3SStefan Weinhuber ect->head = address.head; 23151da177e4SLinus Torvalds ect->record = i + 1; 23161da177e4SLinus Torvalds ect->kl = 0; 23171da177e4SLinus Torvalds ect->dl = fdata->blksize; 2318d42e1712SStefan Haberland /* 2319d42e1712SStefan Haberland * Check for special tracks 0-1 2320d42e1712SStefan Haberland * when formatting CDL 2321d42e1712SStefan Haberland */ 2322f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 232346d1c03cSJan Höppner address.cyl == 0 && address.head == 0) { 23241da177e4SLinus Torvalds if (i < 3) { 23251da177e4SLinus Torvalds ect->kl = 4; 23261da177e4SLinus Torvalds ect->dl = sizes_trk0[i] - 4; 23271da177e4SLinus Torvalds } 23281da177e4SLinus Torvalds } 2329f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 233046d1c03cSJan Höppner address.cyl == 0 && address.head == 1) { 23311da177e4SLinus Torvalds ect->kl = 44; 23321da177e4SLinus Torvalds ect->dl = LABEL_SIZE - 44; 23331da177e4SLinus Torvalds } 23341da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 2335d42e1712SStefan Haberland if (i != 0 || j == 0) 2336d42e1712SStefan Haberland ccw->cmd_code = 2337d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD; 2338d42e1712SStefan Haberland else 2339d42e1712SStefan Haberland ccw->cmd_code = 2340d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD_MT; 23411da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 23421da177e4SLinus Torvalds ccw->count = 8; 23431da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 23441da177e4SLinus Torvalds ccw++; 23451da177e4SLinus Torvalds } 23461da177e4SLinus Torvalds } 2347d42e1712SStefan Haberland } 2348d42e1712SStefan Haberland 2349d42e1712SStefan Haberland fcp->startdev = startdev; 2350d42e1712SStefan Haberland fcp->memdev = startdev; 235129b8dd9dSStefan Haberland fcp->basedev = base; 2352eb6e199bSStefan Weinhuber fcp->retries = 256; 2353d42e1712SStefan Haberland fcp->expires = startdev->default_expires * HZ; 23541aae0560SHeiko Carstens fcp->buildclk = get_tod_clock(); 23551da177e4SLinus Torvalds fcp->status = DASD_CQR_FILLED; 2356d42e1712SStefan Haberland 23571da177e4SLinus Torvalds return fcp; 23581da177e4SLinus Torvalds } 23591da177e4SLinus Torvalds 2360570d237cSJan Höppner /* 2361570d237cSJan Höppner * Wrapper function to build a CCW request depending on input data 2362570d237cSJan Höppner */ 2363570d237cSJan Höppner static struct dasd_ccw_req * 2364570d237cSJan Höppner dasd_eckd_format_build_ccw_req(struct dasd_device *base, 2365570d237cSJan Höppner struct format_data_t *fdata, int enable_pav) 2366d42e1712SStefan Haberland { 2367570d237cSJan Höppner return dasd_eckd_build_format(base, fdata, enable_pav); 2368570d237cSJan Höppner } 2369570d237cSJan Höppner 2370570d237cSJan Höppner /* 2371570d237cSJan Höppner * Sanity checks on format_data 2372570d237cSJan Höppner */ 2373570d237cSJan Höppner static int dasd_eckd_format_sanity_checks(struct dasd_device *base, 2374570d237cSJan Höppner struct format_data_t *fdata) 2375570d237cSJan Höppner { 2376543691a4SSebastian Ott struct dasd_eckd_private *private = base->private; 2377d42e1712SStefan Haberland 2378d42e1712SStefan Haberland if (fdata->start_unit >= 2379d42e1712SStefan Haberland (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2380d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2381d42e1712SStefan Haberland "Start track number %u used in formatting is too big\n", 2382d42e1712SStefan Haberland fdata->start_unit); 2383d42e1712SStefan Haberland return -EINVAL; 2384d42e1712SStefan Haberland } 2385d42e1712SStefan Haberland if (fdata->stop_unit >= 2386d42e1712SStefan Haberland (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2387d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2388d42e1712SStefan Haberland "Stop track number %u used in formatting is too big\n", 2389d42e1712SStefan Haberland fdata->stop_unit); 2390d42e1712SStefan Haberland return -EINVAL; 2391d42e1712SStefan Haberland } 2392d42e1712SStefan Haberland if (fdata->start_unit > fdata->stop_unit) { 2393d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2394d42e1712SStefan Haberland "Start track %u used in formatting exceeds end track\n", 2395d42e1712SStefan Haberland fdata->start_unit); 2396d42e1712SStefan Haberland return -EINVAL; 2397d42e1712SStefan Haberland } 2398d42e1712SStefan Haberland if (dasd_check_blocksize(fdata->blksize) != 0) { 2399d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2400d42e1712SStefan Haberland "The DASD cannot be formatted with block size %u\n", 2401d42e1712SStefan Haberland fdata->blksize); 2402d42e1712SStefan Haberland return -EINVAL; 2403d42e1712SStefan Haberland } 2404570d237cSJan Höppner return 0; 2405570d237cSJan Höppner } 2406570d237cSJan Höppner 2407570d237cSJan Höppner /* 2408570d237cSJan Höppner * This function will process format_data originally coming from an IOCTL 2409570d237cSJan Höppner */ 2410570d237cSJan Höppner static int dasd_eckd_format_process_data(struct dasd_device *base, 2411570d237cSJan Höppner struct format_data_t *fdata, 2412570d237cSJan Höppner int enable_pav) 2413570d237cSJan Höppner { 2414543691a4SSebastian Ott struct dasd_eckd_private *private = base->private; 2415570d237cSJan Höppner struct dasd_ccw_req *cqr, *n; 2416570d237cSJan Höppner struct list_head format_queue; 2417570d237cSJan Höppner struct dasd_device *device; 2418570d237cSJan Höppner int old_start, old_stop, format_step; 2419570d237cSJan Höppner int step, retry; 2420570d237cSJan Höppner int rc; 2421570d237cSJan Höppner 2422570d237cSJan Höppner rc = dasd_eckd_format_sanity_checks(base, fdata); 2423570d237cSJan Höppner if (rc) 2424570d237cSJan Höppner return rc; 2425d42e1712SStefan Haberland 2426d42e1712SStefan Haberland INIT_LIST_HEAD(&format_queue); 2427d42e1712SStefan Haberland 242846d1c03cSJan Höppner old_start = fdata->start_unit; 242929b8dd9dSStefan Haberland old_stop = fdata->stop_unit; 2430d42e1712SStefan Haberland 243146d1c03cSJan Höppner format_step = DASD_CQR_MAX_CCW / recs_per_track(&private->rdc_data, 0, 2432d42e1712SStefan Haberland fdata->blksize); 243346d1c03cSJan Höppner do { 243446d1c03cSJan Höppner retry = 0; 2435d42e1712SStefan Haberland while (fdata->start_unit <= old_stop) { 2436d42e1712SStefan Haberland step = fdata->stop_unit - fdata->start_unit + 1; 243746d1c03cSJan Höppner if (step > format_step) { 243846d1c03cSJan Höppner fdata->stop_unit = 243946d1c03cSJan Höppner fdata->start_unit + format_step - 1; 244046d1c03cSJan Höppner } 2441d42e1712SStefan Haberland 2442570d237cSJan Höppner cqr = dasd_eckd_format_build_ccw_req(base, fdata, 2443570d237cSJan Höppner enable_pav); 2444d42e1712SStefan Haberland if (IS_ERR(cqr)) { 244546d1c03cSJan Höppner rc = PTR_ERR(cqr); 244646d1c03cSJan Höppner if (rc == -ENOMEM) { 244746d1c03cSJan Höppner if (list_empty(&format_queue)) 244846d1c03cSJan Höppner goto out; 2449d42e1712SStefan Haberland /* 245046d1c03cSJan Höppner * not enough memory available, start 245146d1c03cSJan Höppner * requests retry after first requests 245246d1c03cSJan Höppner * were finished 2453d42e1712SStefan Haberland */ 245446d1c03cSJan Höppner retry = 1; 245546d1c03cSJan Höppner break; 2456d42e1712SStefan Haberland } 245746d1c03cSJan Höppner goto out_err; 245846d1c03cSJan Höppner } 245946d1c03cSJan Höppner list_add_tail(&cqr->blocklist, &format_queue); 2460d42e1712SStefan Haberland 2461d42e1712SStefan Haberland fdata->start_unit = fdata->stop_unit + 1; 2462d42e1712SStefan Haberland fdata->stop_unit = old_stop; 2463d42e1712SStefan Haberland } 2464d42e1712SStefan Haberland 246546d1c03cSJan Höppner rc = dasd_sleep_on_queue(&format_queue); 2466d42e1712SStefan Haberland 246746d1c03cSJan Höppner out_err: 2468d42e1712SStefan Haberland list_for_each_entry_safe(cqr, n, &format_queue, blocklist) { 2469d42e1712SStefan Haberland device = cqr->startdev; 2470543691a4SSebastian Ott private = device->private; 2471d42e1712SStefan Haberland if (cqr->status == DASD_CQR_FAILED) 2472d42e1712SStefan Haberland rc = -EIO; 2473d42e1712SStefan Haberland list_del_init(&cqr->blocklist); 2474d42e1712SStefan Haberland dasd_sfree_request(cqr, device); 2475d42e1712SStefan Haberland private->count--; 2476d42e1712SStefan Haberland } 2477d42e1712SStefan Haberland 247846d1c03cSJan Höppner if (rc) 247946d1c03cSJan Höppner goto out; 248029b8dd9dSStefan Haberland 248146d1c03cSJan Höppner } while (retry); 248246d1c03cSJan Höppner 248346d1c03cSJan Höppner out: 248446d1c03cSJan Höppner fdata->start_unit = old_start; 248546d1c03cSJan Höppner fdata->stop_unit = old_stop; 2486d42e1712SStefan Haberland 2487d42e1712SStefan Haberland return rc; 2488d42e1712SStefan Haberland } 2489d42e1712SStefan Haberland 2490570d237cSJan Höppner static int dasd_eckd_format_device(struct dasd_device *base, 2491570d237cSJan Höppner struct format_data_t *fdata, int enable_pav) 2492570d237cSJan Höppner { 2493570d237cSJan Höppner return dasd_eckd_format_process_data(base, fdata, enable_pav); 2494570d237cSJan Höppner } 2495570d237cSJan Höppner 24968e09f215SStefan Weinhuber static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 24971da177e4SLinus Torvalds { 2498a2ace466SHannes Reinecke if (cqr->retries < 0) { 2499a2ace466SHannes Reinecke cqr->status = DASD_CQR_FAILED; 2500a2ace466SHannes Reinecke return; 2501a2ace466SHannes Reinecke } 25028e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 25038e09f215SStefan Weinhuber if (cqr->block && (cqr->startdev != cqr->block->base)) { 25048e09f215SStefan Weinhuber dasd_eckd_reset_ccw_to_base_io(cqr); 25058e09f215SStefan Weinhuber cqr->startdev = cqr->block->base; 2506a4d26c6aSStefan Weinhuber cqr->lpm = cqr->block->base->path_data.opm; 25071da177e4SLinus Torvalds } 25088e09f215SStefan Weinhuber }; 25091da177e4SLinus Torvalds 25101da177e4SLinus Torvalds static dasd_erp_fn_t 25111da177e4SLinus Torvalds dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 25121da177e4SLinus Torvalds { 25138e09f215SStefan Weinhuber struct dasd_device *device = (struct dasd_device *) cqr->startdev; 25141da177e4SLinus Torvalds struct ccw_device *cdev = device->cdev; 25151da177e4SLinus Torvalds 25161da177e4SLinus Torvalds switch (cdev->id.cu_type) { 25171da177e4SLinus Torvalds case 0x3990: 25181da177e4SLinus Torvalds case 0x2105: 25191da177e4SLinus Torvalds case 0x2107: 25201da177e4SLinus Torvalds case 0x1750: 25211da177e4SLinus Torvalds return dasd_3990_erp_action; 25221da177e4SLinus Torvalds case 0x9343: 25231da177e4SLinus Torvalds case 0x3880: 25241da177e4SLinus Torvalds default: 25251da177e4SLinus Torvalds return dasd_default_erp_action; 25261da177e4SLinus Torvalds } 25271da177e4SLinus Torvalds } 25281da177e4SLinus Torvalds 25291da177e4SLinus Torvalds static dasd_erp_fn_t 25301da177e4SLinus Torvalds dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 25311da177e4SLinus Torvalds { 25321da177e4SLinus Torvalds return dasd_default_erp_postaction; 25331da177e4SLinus Torvalds } 25341da177e4SLinus Torvalds 25355a27e60dSStefan Weinhuber static void dasd_eckd_check_for_device_change(struct dasd_device *device, 25365a27e60dSStefan Weinhuber struct dasd_ccw_req *cqr, 25378e09f215SStefan Weinhuber struct irb *irb) 25388e09f215SStefan Weinhuber { 25398e09f215SStefan Weinhuber char mask; 2540f3eb5384SStefan Weinhuber char *sense = NULL; 2541543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 25428e09f215SStefan Weinhuber 25438e09f215SStefan Weinhuber /* first of all check for state change pending interrupt */ 25448e09f215SStefan Weinhuber mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 2545f3eb5384SStefan Weinhuber if ((scsw_dstat(&irb->scsw) & mask) == mask) { 2546c8d1c0ffSStefan Haberland /* 2547c8d1c0ffSStefan Haberland * for alias only, not in offline processing 2548c8d1c0ffSStefan Haberland * and only if not suspended 2549c8d1c0ffSStefan Haberland */ 2550501183f2SStefan Haberland if (!device->block && private->lcu && 255125e2cf1cSStefan Haberland device->state == DASD_STATE_ONLINE && 2552c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_OFFLINE, &device->flags) && 2553c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 2554501183f2SStefan Haberland /* schedule worker to reload device */ 2555501183f2SStefan Haberland dasd_reload_device(device); 2556501183f2SStefan Haberland } 25578e09f215SStefan Weinhuber dasd_generic_handle_state_change(device); 25588e09f215SStefan Weinhuber return; 25598e09f215SStefan Weinhuber } 25608e09f215SStefan Weinhuber 2561a5a0061fSStefan Weinhuber sense = dasd_get_sense(irb); 25625a27e60dSStefan Weinhuber if (!sense) 25635a27e60dSStefan Weinhuber return; 25645a27e60dSStefan Weinhuber 25655a27e60dSStefan Weinhuber /* summary unit check */ 2566c7a29e56SStefan Weinhuber if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) && 2567a5a0061fSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { 256859a9ed5fSStefan Haberland if (test_and_set_bit(DASD_FLAG_SUC, &device->flags)) { 256959a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 257059a9ed5fSStefan Haberland "eckd suc: device already notified"); 257159a9ed5fSStefan Haberland return; 257259a9ed5fSStefan Haberland } 257359a9ed5fSStefan Haberland sense = dasd_get_sense(irb); 257459a9ed5fSStefan Haberland if (!sense) { 257559a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 257659a9ed5fSStefan Haberland "eckd suc: no reason code available"); 257759a9ed5fSStefan Haberland clear_bit(DASD_FLAG_SUC, &device->flags); 257859a9ed5fSStefan Haberland return; 257959a9ed5fSStefan Haberland 258059a9ed5fSStefan Haberland } 258159a9ed5fSStefan Haberland private->suc_reason = sense[8]; 258259a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_NOTICE, device, "%s %x", 258359a9ed5fSStefan Haberland "eckd handle summary unit check: reason", 258459a9ed5fSStefan Haberland private->suc_reason); 258559a9ed5fSStefan Haberland dasd_get_device(device); 258659a9ed5fSStefan Haberland if (!schedule_work(&device->suc_work)) 258759a9ed5fSStefan Haberland dasd_put_device(device); 258859a9ed5fSStefan Haberland 25898e09f215SStefan Weinhuber return; 25908e09f215SStefan Weinhuber } 25918e09f215SStefan Weinhuber 2592f60c768cSStefan Haberland /* service information message SIM */ 25935a27e60dSStefan Weinhuber if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && 2594f3eb5384SStefan Weinhuber ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 2595f3eb5384SStefan Weinhuber dasd_3990_erp_handle_sim(device, sense); 2596f60c768cSStefan Haberland return; 2597f60c768cSStefan Haberland } 2598f60c768cSStefan Haberland 25995a27e60dSStefan Weinhuber /* loss of device reservation is handled via base devices only 26005a27e60dSStefan Weinhuber * as alias devices may be used with several bases 26015a27e60dSStefan Weinhuber */ 2602c7a29e56SStefan Weinhuber if (device->block && (sense[27] & DASD_SENSE_BIT_0) && 2603c7a29e56SStefan Weinhuber (sense[7] == 0x3F) && 26045a27e60dSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && 26055a27e60dSStefan Weinhuber test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { 26065a27e60dSStefan Weinhuber if (device->features & DASD_FEATURE_FAILONSLCK) 26075a27e60dSStefan Weinhuber set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); 26085a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 26095a27e60dSStefan Weinhuber dev_err(&device->cdev->dev, 26105a27e60dSStefan Weinhuber "The device reservation was lost\n"); 2611ada3df91SStefan Haberland } 26125a27e60dSStefan Weinhuber } 2613f3eb5384SStefan Weinhuber 2614f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( 2615f3eb5384SStefan Weinhuber struct dasd_device *startdev, 26168e09f215SStefan Weinhuber struct dasd_block *block, 2617f3eb5384SStefan Weinhuber struct request *req, 2618f3eb5384SStefan Weinhuber sector_t first_rec, 2619f3eb5384SStefan Weinhuber sector_t last_rec, 2620f3eb5384SStefan Weinhuber sector_t first_trk, 2621f3eb5384SStefan Weinhuber sector_t last_trk, 2622f3eb5384SStefan Weinhuber unsigned int first_offs, 2623f3eb5384SStefan Weinhuber unsigned int last_offs, 2624f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 2625f3eb5384SStefan Weinhuber unsigned int blksize) 26261da177e4SLinus Torvalds { 26271da177e4SLinus Torvalds struct dasd_eckd_private *private; 26281da177e4SLinus Torvalds unsigned long *idaws; 26291da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 26301da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 26311da177e4SLinus Torvalds struct ccw1 *ccw; 26325705f702SNeilBrown struct req_iterator iter; 26337988613bSKent Overstreet struct bio_vec bv; 26341da177e4SLinus Torvalds char *dst; 2635f3eb5384SStefan Weinhuber unsigned int off; 26361da177e4SLinus Torvalds int count, cidaw, cplength, datasize; 2637f3eb5384SStefan Weinhuber sector_t recid; 26381da177e4SLinus Torvalds unsigned char cmd, rcmd; 26398e09f215SStefan Weinhuber int use_prefix; 26408e09f215SStefan Weinhuber struct dasd_device *basedev; 26411da177e4SLinus Torvalds 26428e09f215SStefan Weinhuber basedev = block->base; 2643543691a4SSebastian Ott private = basedev->private; 26441da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 26451da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_READ_MT; 26461da177e4SLinus Torvalds else if (rq_data_dir(req) == WRITE) 26471da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_WRITE_MT; 26481da177e4SLinus Torvalds else 26491da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 2650f3eb5384SStefan Weinhuber 26511da177e4SLinus Torvalds /* Check struct bio and count the number of blocks for the request. */ 26521da177e4SLinus Torvalds count = 0; 26531da177e4SLinus Torvalds cidaw = 0; 26545705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 26557988613bSKent Overstreet if (bv.bv_len & (blksize - 1)) 26561da177e4SLinus Torvalds /* Eckd can only do full blocks. */ 26571da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 26587988613bSKent Overstreet count += bv.bv_len >> (block->s2b_shift + 9); 26597988613bSKent Overstreet if (idal_is_needed (page_address(bv.bv_page), bv.bv_len)) 26607988613bSKent Overstreet cidaw += bv.bv_len >> (block->s2b_shift + 9); 26611da177e4SLinus Torvalds } 26621da177e4SLinus Torvalds /* Paranoia. */ 26631da177e4SLinus Torvalds if (count != last_rec - first_rec + 1) 26641da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 26658e09f215SStefan Weinhuber 26668e09f215SStefan Weinhuber /* use the prefix command if available */ 26678e09f215SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 26688e09f215SStefan Weinhuber if (use_prefix) { 26698e09f215SStefan Weinhuber /* 1x prefix + number of blocks */ 26708e09f215SStefan Weinhuber cplength = 2 + count; 26718e09f215SStefan Weinhuber /* 1x prefix + cidaws*sizeof(long) */ 26728e09f215SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 26738e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 26748e09f215SStefan Weinhuber cidaw * sizeof(unsigned long); 26758e09f215SStefan Weinhuber } else { 26761da177e4SLinus Torvalds /* 1x define extent + 1x locate record + number of blocks */ 26771da177e4SLinus Torvalds cplength = 2 + count; 26781da177e4SLinus Torvalds /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 26798e09f215SStefan Weinhuber datasize = sizeof(struct DE_eckd_data) + 26808e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 26811da177e4SLinus Torvalds cidaw * sizeof(unsigned long); 26828e09f215SStefan Weinhuber } 26831da177e4SLinus Torvalds /* Find out the number of additional locate record ccws for cdl. */ 26841da177e4SLinus Torvalds if (private->uses_cdl && first_rec < 2*blk_per_trk) { 26851da177e4SLinus Torvalds if (last_rec >= 2*blk_per_trk) 26861da177e4SLinus Torvalds count = 2*blk_per_trk - first_rec; 26871da177e4SLinus Torvalds cplength += count; 26881da177e4SLinus Torvalds datasize += count*sizeof(struct LO_eckd_data); 26891da177e4SLinus Torvalds } 26901da177e4SLinus Torvalds /* Allocate the ccw request. */ 269168b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 269268b781feSStefan Haberland startdev); 26931da177e4SLinus Torvalds if (IS_ERR(cqr)) 26941da177e4SLinus Torvalds return cqr; 26951da177e4SLinus Torvalds ccw = cqr->cpaddr; 26968e09f215SStefan Weinhuber /* First ccw is define extent or prefix. */ 26978e09f215SStefan Weinhuber if (use_prefix) { 26988e09f215SStefan Weinhuber if (prefix(ccw++, cqr->data, first_trk, 26998e09f215SStefan Weinhuber last_trk, cmd, basedev, startdev) == -EAGAIN) { 27008e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 27018e09f215SStefan Weinhuber * Try again later. 27028e09f215SStefan Weinhuber */ 27038e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2704d54853efSMartin Schwidefsky return ERR_PTR(-EAGAIN); 2705d54853efSMartin Schwidefsky } 27068e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 27078e09f215SStefan Weinhuber sizeof(struct PFX_eckd_data)); 27088e09f215SStefan Weinhuber } else { 27098e09f215SStefan Weinhuber if (define_extent(ccw++, cqr->data, first_trk, 2710b38f27e8SStefan Haberland last_trk, cmd, basedev) == -EAGAIN) { 27118e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 27128e09f215SStefan Weinhuber * Try again later. 27138e09f215SStefan Weinhuber */ 27148e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 27158e09f215SStefan Weinhuber return ERR_PTR(-EAGAIN); 27168e09f215SStefan Weinhuber } 27178e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 27188e09f215SStefan Weinhuber sizeof(struct DE_eckd_data)); 27198e09f215SStefan Weinhuber } 27201da177e4SLinus Torvalds /* Build locate_record+read/write/ccws. */ 27211da177e4SLinus Torvalds LO_data = (struct LO_eckd_data *) (idaws + cidaw); 27221da177e4SLinus Torvalds recid = first_rec; 27231da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 27241da177e4SLinus Torvalds /* Only standard blocks so there is just one locate record. */ 27251da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 27261da177e4SLinus Torvalds locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 27278e09f215SStefan Weinhuber last_rec - recid + 1, cmd, basedev, blksize); 27281da177e4SLinus Torvalds } 27295705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 27307988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 27311da177e4SLinus Torvalds if (dasd_page_cache) { 27321da177e4SLinus Torvalds char *copy = kmem_cache_alloc(dasd_page_cache, 2733441e143eSChristoph Lameter GFP_DMA | __GFP_NOWARN); 27341da177e4SLinus Torvalds if (copy && rq_data_dir(req) == WRITE) 27357988613bSKent Overstreet memcpy(copy + bv.bv_offset, dst, bv.bv_len); 27361da177e4SLinus Torvalds if (copy) 27377988613bSKent Overstreet dst = copy + bv.bv_offset; 27381da177e4SLinus Torvalds } 27397988613bSKent Overstreet for (off = 0; off < bv.bv_len; off += blksize) { 27401da177e4SLinus Torvalds sector_t trkid = recid; 27411da177e4SLinus Torvalds unsigned int recoffs = sector_div(trkid, blk_per_trk); 27421da177e4SLinus Torvalds rcmd = cmd; 27431da177e4SLinus Torvalds count = blksize; 27441da177e4SLinus Torvalds /* Locate record for cdl special block ? */ 27451da177e4SLinus Torvalds if (private->uses_cdl && recid < 2*blk_per_trk) { 27461da177e4SLinus Torvalds if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 27471da177e4SLinus Torvalds rcmd |= 0x8; 27481da177e4SLinus Torvalds count = dasd_eckd_cdl_reclen(recid); 2749ec5883abSHorst Hummel if (count < blksize && 2750ec5883abSHorst Hummel rq_data_dir(req) == READ) 27511da177e4SLinus Torvalds memset(dst + count, 0xe5, 27521da177e4SLinus Torvalds blksize - count); 27531da177e4SLinus Torvalds } 27541da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 27551da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 27561da177e4SLinus Torvalds trkid, recoffs + 1, 27578e09f215SStefan Weinhuber 1, rcmd, basedev, count); 27581da177e4SLinus Torvalds } 27591da177e4SLinus Torvalds /* Locate record for standard blocks ? */ 27601da177e4SLinus Torvalds if (private->uses_cdl && recid == 2*blk_per_trk) { 27611da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 27621da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 27631da177e4SLinus Torvalds trkid, recoffs + 1, 27641da177e4SLinus Torvalds last_rec - recid + 1, 27658e09f215SStefan Weinhuber cmd, basedev, count); 27661da177e4SLinus Torvalds } 27671da177e4SLinus Torvalds /* Read/write ccw. */ 27681da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 27691da177e4SLinus Torvalds ccw->cmd_code = rcmd; 27701da177e4SLinus Torvalds ccw->count = count; 27711da177e4SLinus Torvalds if (idal_is_needed(dst, blksize)) { 27721da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) idaws; 27731da177e4SLinus Torvalds ccw->flags = CCW_FLAG_IDA; 27741da177e4SLinus Torvalds idaws = idal_create_words(idaws, dst, blksize); 27751da177e4SLinus Torvalds } else { 27761da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) dst; 27771da177e4SLinus Torvalds ccw->flags = 0; 27781da177e4SLinus Torvalds } 27791da177e4SLinus Torvalds ccw++; 27801da177e4SLinus Torvalds dst += blksize; 27811da177e4SLinus Torvalds recid++; 27821da177e4SLinus Torvalds } 27831da177e4SLinus Torvalds } 278413de227bSHolger Smolinski if (blk_noretry_request(req) || 278513de227bSHolger Smolinski block->base->features & DASD_FEATURE_FAILFAST) 27861c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 27878e09f215SStefan Weinhuber cqr->startdev = startdev; 27888e09f215SStefan Weinhuber cqr->memdev = startdev; 27898e09f215SStefan Weinhuber cqr->block = block; 27907c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2791a4d26c6aSStefan Weinhuber cqr->lpm = startdev->path_data.ppm; 27921f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 27931aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 27941da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 27951da177e4SLinus Torvalds return cqr; 27961da177e4SLinus Torvalds } 27971da177e4SLinus Torvalds 2798f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 2799f3eb5384SStefan Weinhuber struct dasd_device *startdev, 2800f3eb5384SStefan Weinhuber struct dasd_block *block, 2801f3eb5384SStefan Weinhuber struct request *req, 2802f3eb5384SStefan Weinhuber sector_t first_rec, 2803f3eb5384SStefan Weinhuber sector_t last_rec, 2804f3eb5384SStefan Weinhuber sector_t first_trk, 2805f3eb5384SStefan Weinhuber sector_t last_trk, 2806f3eb5384SStefan Weinhuber unsigned int first_offs, 2807f3eb5384SStefan Weinhuber unsigned int last_offs, 2808f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 2809f3eb5384SStefan Weinhuber unsigned int blksize) 2810f3eb5384SStefan Weinhuber { 2811f3eb5384SStefan Weinhuber unsigned long *idaws; 2812f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 2813f3eb5384SStefan Weinhuber struct ccw1 *ccw; 2814f3eb5384SStefan Weinhuber struct req_iterator iter; 28157988613bSKent Overstreet struct bio_vec bv; 2816f3eb5384SStefan Weinhuber char *dst, *idaw_dst; 2817f3eb5384SStefan Weinhuber unsigned int cidaw, cplength, datasize; 2818f3eb5384SStefan Weinhuber unsigned int tlf; 2819f3eb5384SStefan Weinhuber sector_t recid; 2820f3eb5384SStefan Weinhuber unsigned char cmd; 2821f3eb5384SStefan Weinhuber struct dasd_device *basedev; 2822f3eb5384SStefan Weinhuber unsigned int trkcount, count, count_to_trk_end; 2823f3eb5384SStefan Weinhuber unsigned int idaw_len, seg_len, part_len, len_to_track_end; 2824f3eb5384SStefan Weinhuber unsigned char new_track, end_idaw; 2825f3eb5384SStefan Weinhuber sector_t trkid; 2826f3eb5384SStefan Weinhuber unsigned int recoffs; 2827f3eb5384SStefan Weinhuber 2828f3eb5384SStefan Weinhuber basedev = block->base; 2829f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) 2830f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 2831f3eb5384SStefan Weinhuber else if (rq_data_dir(req) == WRITE) 2832f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 2833f3eb5384SStefan Weinhuber else 2834f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 2835f3eb5384SStefan Weinhuber 2836f3eb5384SStefan Weinhuber /* Track based I/O needs IDAWs for each page, and not just for 2837f3eb5384SStefan Weinhuber * 64 bit addresses. We need additional idals for pages 2838f3eb5384SStefan Weinhuber * that get filled from two tracks, so we use the number 2839f3eb5384SStefan Weinhuber * of records as upper limit. 2840f3eb5384SStefan Weinhuber */ 2841f3eb5384SStefan Weinhuber cidaw = last_rec - first_rec + 1; 2842f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 2843f3eb5384SStefan Weinhuber 2844f3eb5384SStefan Weinhuber /* 1x prefix + one read/write ccw per track */ 2845f3eb5384SStefan Weinhuber cplength = 1 + trkcount; 2846f3eb5384SStefan Weinhuber 2847f3eb5384SStefan Weinhuber /* on 31-bit we need space for two 32 bit addresses per page 2848f3eb5384SStefan Weinhuber * on 64-bit one 64 bit address 2849f3eb5384SStefan Weinhuber */ 2850f3eb5384SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 2851f3eb5384SStefan Weinhuber cidaw * sizeof(unsigned long long); 2852f3eb5384SStefan Weinhuber 2853f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 285468b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 285568b781feSStefan Haberland startdev); 2856f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 2857f3eb5384SStefan Weinhuber return cqr; 2858f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 2859f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 2860f3eb5384SStefan Weinhuber if (first_trk == last_trk) 2861f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 2862f3eb5384SStefan Weinhuber else 2863f3eb5384SStefan Weinhuber tlf = last_offs + 1; 2864f3eb5384SStefan Weinhuber tlf *= blksize; 2865f3eb5384SStefan Weinhuber 2866f3eb5384SStefan Weinhuber if (prefix_LRE(ccw++, cqr->data, first_trk, 2867f3eb5384SStefan Weinhuber last_trk, cmd, basedev, startdev, 2868f3eb5384SStefan Weinhuber 1 /* format */, first_offs + 1, 2869f3eb5384SStefan Weinhuber trkcount, blksize, 2870f3eb5384SStefan Weinhuber tlf) == -EAGAIN) { 2871f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 2872f3eb5384SStefan Weinhuber * Try again later. 2873f3eb5384SStefan Weinhuber */ 2874f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2875f3eb5384SStefan Weinhuber return ERR_PTR(-EAGAIN); 2876f3eb5384SStefan Weinhuber } 2877f3eb5384SStefan Weinhuber 2878f3eb5384SStefan Weinhuber /* 2879f3eb5384SStefan Weinhuber * The translation of request into ccw programs must meet the 2880f3eb5384SStefan Weinhuber * following conditions: 2881f3eb5384SStefan Weinhuber * - all idaws but the first and the last must address full pages 2882f3eb5384SStefan Weinhuber * (or 2K blocks on 31-bit) 2883f3eb5384SStefan Weinhuber * - the scope of a ccw and it's idal ends with the track boundaries 2884f3eb5384SStefan Weinhuber */ 2885f3eb5384SStefan Weinhuber idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); 2886f3eb5384SStefan Weinhuber recid = first_rec; 2887f3eb5384SStefan Weinhuber new_track = 1; 2888f3eb5384SStefan Weinhuber end_idaw = 0; 2889f3eb5384SStefan Weinhuber len_to_track_end = 0; 2890246ccea1SMartin Schwidefsky idaw_dst = NULL; 2891f3eb5384SStefan Weinhuber idaw_len = 0; 2892f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 28937988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 28947988613bSKent Overstreet seg_len = bv.bv_len; 2895f3eb5384SStefan Weinhuber while (seg_len) { 2896f3eb5384SStefan Weinhuber if (new_track) { 2897f3eb5384SStefan Weinhuber trkid = recid; 2898f3eb5384SStefan Weinhuber recoffs = sector_div(trkid, blk_per_trk); 2899f3eb5384SStefan Weinhuber count_to_trk_end = blk_per_trk - recoffs; 2900f3eb5384SStefan Weinhuber count = min((last_rec - recid + 1), 2901f3eb5384SStefan Weinhuber (sector_t)count_to_trk_end); 2902f3eb5384SStefan Weinhuber len_to_track_end = count * blksize; 2903f3eb5384SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 2904f3eb5384SStefan Weinhuber ccw->cmd_code = cmd; 2905f3eb5384SStefan Weinhuber ccw->count = len_to_track_end; 2906f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 2907f3eb5384SStefan Weinhuber ccw->flags = CCW_FLAG_IDA; 2908f3eb5384SStefan Weinhuber ccw++; 2909f3eb5384SStefan Weinhuber recid += count; 2910f3eb5384SStefan Weinhuber new_track = 0; 291152db45c3SStefan Weinhuber /* first idaw for a ccw may start anywhere */ 291252db45c3SStefan Weinhuber if (!idaw_dst) 291352db45c3SStefan Weinhuber idaw_dst = dst; 2914f3eb5384SStefan Weinhuber } 291552db45c3SStefan Weinhuber /* If we start a new idaw, we must make sure that it 291652db45c3SStefan Weinhuber * starts on an IDA_BLOCK_SIZE boundary. 2917f3eb5384SStefan Weinhuber * If we continue an idaw, we must make sure that the 2918f3eb5384SStefan Weinhuber * current segment begins where the so far accumulated 2919f3eb5384SStefan Weinhuber * idaw ends 2920f3eb5384SStefan Weinhuber */ 292152db45c3SStefan Weinhuber if (!idaw_dst) { 292252db45c3SStefan Weinhuber if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { 292352db45c3SStefan Weinhuber dasd_sfree_request(cqr, startdev); 292452db45c3SStefan Weinhuber return ERR_PTR(-ERANGE); 292552db45c3SStefan Weinhuber } else 2926f3eb5384SStefan Weinhuber idaw_dst = dst; 292752db45c3SStefan Weinhuber } 2928f3eb5384SStefan Weinhuber if ((idaw_dst + idaw_len) != dst) { 2929f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2930f3eb5384SStefan Weinhuber return ERR_PTR(-ERANGE); 2931f3eb5384SStefan Weinhuber } 2932f3eb5384SStefan Weinhuber part_len = min(seg_len, len_to_track_end); 2933f3eb5384SStefan Weinhuber seg_len -= part_len; 2934f3eb5384SStefan Weinhuber dst += part_len; 2935f3eb5384SStefan Weinhuber idaw_len += part_len; 2936f3eb5384SStefan Weinhuber len_to_track_end -= part_len; 2937f3eb5384SStefan Weinhuber /* collected memory area ends on an IDA_BLOCK border, 2938f3eb5384SStefan Weinhuber * -> create an idaw 2939f3eb5384SStefan Weinhuber * idal_create_words will handle cases where idaw_len 2940f3eb5384SStefan Weinhuber * is larger then IDA_BLOCK_SIZE 2941f3eb5384SStefan Weinhuber */ 2942f3eb5384SStefan Weinhuber if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) 2943f3eb5384SStefan Weinhuber end_idaw = 1; 2944f3eb5384SStefan Weinhuber /* We also need to end the idaw at track end */ 2945f3eb5384SStefan Weinhuber if (!len_to_track_end) { 2946f3eb5384SStefan Weinhuber new_track = 1; 2947f3eb5384SStefan Weinhuber end_idaw = 1; 2948f3eb5384SStefan Weinhuber } 2949f3eb5384SStefan Weinhuber if (end_idaw) { 2950f3eb5384SStefan Weinhuber idaws = idal_create_words(idaws, idaw_dst, 2951f3eb5384SStefan Weinhuber idaw_len); 2952246ccea1SMartin Schwidefsky idaw_dst = NULL; 2953f3eb5384SStefan Weinhuber idaw_len = 0; 2954f3eb5384SStefan Weinhuber end_idaw = 0; 2955f3eb5384SStefan Weinhuber } 2956f3eb5384SStefan Weinhuber } 2957f3eb5384SStefan Weinhuber } 2958f3eb5384SStefan Weinhuber 2959f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 2960f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 2961f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2962f3eb5384SStefan Weinhuber cqr->startdev = startdev; 2963f3eb5384SStefan Weinhuber cqr->memdev = startdev; 2964f3eb5384SStefan Weinhuber cqr->block = block; 29657c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2966a4d26c6aSStefan Weinhuber cqr->lpm = startdev->path_data.ppm; 29671f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 29681aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 2969f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 2970f3eb5384SStefan Weinhuber return cqr; 2971f3eb5384SStefan Weinhuber } 2972f3eb5384SStefan Weinhuber 2973f3eb5384SStefan Weinhuber static int prepare_itcw(struct itcw *itcw, 2974f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 2975f3eb5384SStefan Weinhuber struct dasd_device *basedev, 2976f3eb5384SStefan Weinhuber struct dasd_device *startdev, 2977f3eb5384SStefan Weinhuber unsigned int rec_on_trk, int count, 2978f3eb5384SStefan Weinhuber unsigned int blksize, 2979f3eb5384SStefan Weinhuber unsigned int total_data_size, 2980f3eb5384SStefan Weinhuber unsigned int tlf, 2981f3eb5384SStefan Weinhuber unsigned int blk_per_trk) 2982f3eb5384SStefan Weinhuber { 2983f3eb5384SStefan Weinhuber struct PFX_eckd_data pfxdata; 2984f3eb5384SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 2985f3eb5384SStefan Weinhuber struct DE_eckd_data *dedata; 2986f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 2987f3eb5384SStefan Weinhuber struct dcw *dcw; 2988f3eb5384SStefan Weinhuber 2989f3eb5384SStefan Weinhuber u32 begcyl, endcyl; 2990f3eb5384SStefan Weinhuber u16 heads, beghead, endhead; 2991f3eb5384SStefan Weinhuber u8 pfx_cmd; 2992f3eb5384SStefan Weinhuber 2993f3eb5384SStefan Weinhuber int rc = 0; 2994f3eb5384SStefan Weinhuber int sector = 0; 2995f3eb5384SStefan Weinhuber int dn, d; 2996f3eb5384SStefan Weinhuber 2997f3eb5384SStefan Weinhuber 2998f3eb5384SStefan Weinhuber /* setup prefix data */ 2999543691a4SSebastian Ott basepriv = basedev->private; 3000543691a4SSebastian Ott startpriv = startdev->private; 3001f3eb5384SStefan Weinhuber dedata = &pfxdata.define_extent; 3002f3eb5384SStefan Weinhuber lredata = &pfxdata.locate_record; 3003f3eb5384SStefan Weinhuber 3004f3eb5384SStefan Weinhuber memset(&pfxdata, 0, sizeof(pfxdata)); 3005f3eb5384SStefan Weinhuber pfxdata.format = 1; /* PFX with LRE */ 3006f3eb5384SStefan Weinhuber pfxdata.base_address = basepriv->ned->unit_addr; 3007f3eb5384SStefan Weinhuber pfxdata.base_lss = basepriv->ned->ID; 3008f3eb5384SStefan Weinhuber pfxdata.validity.define_extent = 1; 3009f3eb5384SStefan Weinhuber 3010f3eb5384SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 3011f3eb5384SStefan Weinhuber if (startpriv->uid.type != UA_BASE_DEVICE) { 3012f3eb5384SStefan Weinhuber pfxdata.validity.verify_base = 1; 3013f3eb5384SStefan Weinhuber if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 3014f3eb5384SStefan Weinhuber pfxdata.validity.hyper_pav = 1; 3015f3eb5384SStefan Weinhuber } 3016f3eb5384SStefan Weinhuber 3017f3eb5384SStefan Weinhuber switch (cmd) { 3018f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 3019f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 3020f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 3021f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 3022f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 3023f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 3024f3eb5384SStefan Weinhuber lredata->operation.operation = 0x0C; 3025f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x01; 3026f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX_READ; 3027f3eb5384SStefan Weinhuber break; 3028f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 3029f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 3030f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 3031f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 3032f3eb5384SStefan Weinhuber rc = check_XRC_on_prefix(&pfxdata, basedev); 3033f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 3034f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 3035f3eb5384SStefan Weinhuber lredata->operation.operation = 0x3F; 3036f3eb5384SStefan Weinhuber lredata->extended_operation = 0x23; 3037f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x2; 3038f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX; 3039f3eb5384SStefan Weinhuber break; 3040f3eb5384SStefan Weinhuber default: 3041f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 3042f3eb5384SStefan Weinhuber "prepare itcw, unknown opcode 0x%x", cmd); 3043f3eb5384SStefan Weinhuber BUG(); 3044f3eb5384SStefan Weinhuber break; 3045f3eb5384SStefan Weinhuber } 3046f3eb5384SStefan Weinhuber if (rc) 3047f3eb5384SStefan Weinhuber return rc; 3048f3eb5384SStefan Weinhuber 3049f3eb5384SStefan Weinhuber dedata->attributes.mode = 0x3; /* ECKD */ 3050f3eb5384SStefan Weinhuber 3051f3eb5384SStefan Weinhuber heads = basepriv->rdc_data.trk_per_cyl; 3052f3eb5384SStefan Weinhuber begcyl = trk / heads; 3053f3eb5384SStefan Weinhuber beghead = trk % heads; 3054f3eb5384SStefan Weinhuber endcyl = totrk / heads; 3055f3eb5384SStefan Weinhuber endhead = totrk % heads; 3056f3eb5384SStefan Weinhuber 3057f3eb5384SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 3058f3eb5384SStefan Weinhuber if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 3059f3eb5384SStefan Weinhuber dedata->attributes.operation == DASD_SEQ_ACCESS) { 3060f3eb5384SStefan Weinhuber 3061f3eb5384SStefan Weinhuber if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 3062f3eb5384SStefan Weinhuber endcyl += basepriv->attrib.nr_cyl; 3063f3eb5384SStefan Weinhuber else 3064f3eb5384SStefan Weinhuber endcyl = (basepriv->real_cyl - 1); 3065f3eb5384SStefan Weinhuber } 3066f3eb5384SStefan Weinhuber 3067f3eb5384SStefan Weinhuber set_ch_t(&dedata->beg_ext, begcyl, beghead); 3068f3eb5384SStefan Weinhuber set_ch_t(&dedata->end_ext, endcyl, endhead); 3069f3eb5384SStefan Weinhuber 3070f3eb5384SStefan Weinhuber dedata->ep_format = 0x20; /* records per track is valid */ 3071f3eb5384SStefan Weinhuber dedata->ep_rec_per_track = blk_per_trk; 3072f3eb5384SStefan Weinhuber 3073f3eb5384SStefan Weinhuber if (rec_on_trk) { 3074f3eb5384SStefan Weinhuber switch (basepriv->rdc_data.dev_type) { 3075f3eb5384SStefan Weinhuber case 0x3390: 3076f3eb5384SStefan Weinhuber dn = ceil_quot(blksize + 6, 232); 3077f3eb5384SStefan Weinhuber d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); 3078f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 3079f3eb5384SStefan Weinhuber break; 3080f3eb5384SStefan Weinhuber case 0x3380: 3081f3eb5384SStefan Weinhuber d = 7 + ceil_quot(blksize + 12, 32); 3082f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 3083f3eb5384SStefan Weinhuber break; 3084f3eb5384SStefan Weinhuber } 3085f3eb5384SStefan Weinhuber } 3086f3eb5384SStefan Weinhuber 3087f3eb5384SStefan Weinhuber lredata->auxiliary.length_valid = 1; 3088f3eb5384SStefan Weinhuber lredata->auxiliary.length_scope = 1; 3089f3eb5384SStefan Weinhuber lredata->auxiliary.imbedded_ccw_valid = 1; 3090f3eb5384SStefan Weinhuber lredata->length = tlf; 3091f3eb5384SStefan Weinhuber lredata->imbedded_ccw = cmd; 3092f3eb5384SStefan Weinhuber lredata->count = count; 3093f3eb5384SStefan Weinhuber lredata->sector = sector; 3094f3eb5384SStefan Weinhuber set_ch_t(&lredata->seek_addr, begcyl, beghead); 3095f3eb5384SStefan Weinhuber lredata->search_arg.cyl = lredata->seek_addr.cyl; 3096f3eb5384SStefan Weinhuber lredata->search_arg.head = lredata->seek_addr.head; 3097f3eb5384SStefan Weinhuber lredata->search_arg.record = rec_on_trk; 3098f3eb5384SStefan Weinhuber 3099f3eb5384SStefan Weinhuber dcw = itcw_add_dcw(itcw, pfx_cmd, 0, 3100f3eb5384SStefan Weinhuber &pfxdata, sizeof(pfxdata), total_data_size); 310182a7b955SThomas Meyer return PTR_RET(dcw); 3102f3eb5384SStefan Weinhuber } 3103f3eb5384SStefan Weinhuber 3104f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 3105f3eb5384SStefan Weinhuber struct dasd_device *startdev, 3106f3eb5384SStefan Weinhuber struct dasd_block *block, 3107f3eb5384SStefan Weinhuber struct request *req, 3108f3eb5384SStefan Weinhuber sector_t first_rec, 3109f3eb5384SStefan Weinhuber sector_t last_rec, 3110f3eb5384SStefan Weinhuber sector_t first_trk, 3111f3eb5384SStefan Weinhuber sector_t last_trk, 3112f3eb5384SStefan Weinhuber unsigned int first_offs, 3113f3eb5384SStefan Weinhuber unsigned int last_offs, 3114f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 3115f3eb5384SStefan Weinhuber unsigned int blksize) 3116f3eb5384SStefan Weinhuber { 3117f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 3118f3eb5384SStefan Weinhuber struct req_iterator iter; 31197988613bSKent Overstreet struct bio_vec bv; 3120f3eb5384SStefan Weinhuber char *dst; 3121f3eb5384SStefan Weinhuber unsigned int trkcount, ctidaw; 3122f3eb5384SStefan Weinhuber unsigned char cmd; 3123f3eb5384SStefan Weinhuber struct dasd_device *basedev; 3124f3eb5384SStefan Weinhuber unsigned int tlf; 3125f3eb5384SStefan Weinhuber struct itcw *itcw; 3126f3eb5384SStefan Weinhuber struct tidaw *last_tidaw = NULL; 3127f3eb5384SStefan Weinhuber int itcw_op; 3128f3eb5384SStefan Weinhuber size_t itcw_size; 3129ef19298bSStefan Weinhuber u8 tidaw_flags; 3130ef19298bSStefan Weinhuber unsigned int seg_len, part_len, len_to_track_end; 3131ef19298bSStefan Weinhuber unsigned char new_track; 3132ef19298bSStefan Weinhuber sector_t recid, trkid; 3133ef19298bSStefan Weinhuber unsigned int offs; 3134ef19298bSStefan Weinhuber unsigned int count, count_to_trk_end; 3135cd10502bSJulia Lawall int ret; 3136f3eb5384SStefan Weinhuber 3137f3eb5384SStefan Weinhuber basedev = block->base; 3138f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) { 3139f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 3140f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_READ; 3141f3eb5384SStefan Weinhuber } else if (rq_data_dir(req) == WRITE) { 3142f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 3143f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_WRITE; 3144f3eb5384SStefan Weinhuber } else 3145f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 3146f3eb5384SStefan Weinhuber 3147f3eb5384SStefan Weinhuber /* trackbased I/O needs address all memory via TIDAWs, 3148f3eb5384SStefan Weinhuber * not just for 64 bit addresses. This allows us to map 3149f3eb5384SStefan Weinhuber * each segment directly to one tidaw. 3150ef19298bSStefan Weinhuber * In the case of write requests, additional tidaws may 3151ef19298bSStefan Weinhuber * be needed when a segment crosses a track boundary. 3152f3eb5384SStefan Weinhuber */ 3153f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 3154f3eb5384SStefan Weinhuber ctidaw = 0; 3155f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 3156f3eb5384SStefan Weinhuber ++ctidaw; 3157f3eb5384SStefan Weinhuber } 3158ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 3159ef19298bSStefan Weinhuber ctidaw += (last_trk - first_trk); 3160f3eb5384SStefan Weinhuber 3161f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 3162f3eb5384SStefan Weinhuber itcw_size = itcw_calc_size(0, ctidaw, 0); 316368b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 3164f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 3165f3eb5384SStefan Weinhuber return cqr; 3166f3eb5384SStefan Weinhuber 3167f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 3168f3eb5384SStefan Weinhuber if (first_trk == last_trk) 3169f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 3170f3eb5384SStefan Weinhuber else 3171f3eb5384SStefan Weinhuber tlf = last_offs + 1; 3172f3eb5384SStefan Weinhuber tlf *= blksize; 3173f3eb5384SStefan Weinhuber 3174f3eb5384SStefan Weinhuber itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); 3175ef19298bSStefan Weinhuber if (IS_ERR(itcw)) { 3176cd10502bSJulia Lawall ret = -EINVAL; 3177cd10502bSJulia Lawall goto out_error; 3178ef19298bSStefan Weinhuber } 3179f3eb5384SStefan Weinhuber cqr->cpaddr = itcw_get_tcw(itcw); 3180f3eb5384SStefan Weinhuber if (prepare_itcw(itcw, first_trk, last_trk, 3181f3eb5384SStefan Weinhuber cmd, basedev, startdev, 3182f3eb5384SStefan Weinhuber first_offs + 1, 3183f3eb5384SStefan Weinhuber trkcount, blksize, 3184f3eb5384SStefan Weinhuber (last_rec - first_rec + 1) * blksize, 3185f3eb5384SStefan Weinhuber tlf, blk_per_trk) == -EAGAIN) { 3186f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 3187f3eb5384SStefan Weinhuber * Try again later. 3188f3eb5384SStefan Weinhuber */ 3189cd10502bSJulia Lawall ret = -EAGAIN; 3190cd10502bSJulia Lawall goto out_error; 3191f3eb5384SStefan Weinhuber } 3192d54cddb6SHeiko Carstens len_to_track_end = 0; 3193f3eb5384SStefan Weinhuber /* 3194f3eb5384SStefan Weinhuber * A tidaw can address 4k of memory, but must not cross page boundaries 3195f3eb5384SStefan Weinhuber * We can let the block layer handle this by setting 3196f3eb5384SStefan Weinhuber * blk_queue_segment_boundary to page boundaries and 3197f3eb5384SStefan Weinhuber * blk_max_segment_size to page size when setting up the request queue. 3198ef19298bSStefan Weinhuber * For write requests, a TIDAW must not cross track boundaries, because 3199ef19298bSStefan Weinhuber * we have to set the CBC flag on the last tidaw for each track. 3200f3eb5384SStefan Weinhuber */ 3201ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) { 3202ef19298bSStefan Weinhuber new_track = 1; 3203ef19298bSStefan Weinhuber recid = first_rec; 3204f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 32057988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 32067988613bSKent Overstreet seg_len = bv.bv_len; 3207ef19298bSStefan Weinhuber while (seg_len) { 3208ef19298bSStefan Weinhuber if (new_track) { 3209ef19298bSStefan Weinhuber trkid = recid; 3210ef19298bSStefan Weinhuber offs = sector_div(trkid, blk_per_trk); 3211ef19298bSStefan Weinhuber count_to_trk_end = blk_per_trk - offs; 3212ef19298bSStefan Weinhuber count = min((last_rec - recid + 1), 3213ef19298bSStefan Weinhuber (sector_t)count_to_trk_end); 3214ef19298bSStefan Weinhuber len_to_track_end = count * blksize; 3215ef19298bSStefan Weinhuber recid += count; 3216ef19298bSStefan Weinhuber new_track = 0; 3217f3eb5384SStefan Weinhuber } 3218ef19298bSStefan Weinhuber part_len = min(seg_len, len_to_track_end); 3219ef19298bSStefan Weinhuber seg_len -= part_len; 3220ef19298bSStefan Weinhuber len_to_track_end -= part_len; 3221ef19298bSStefan Weinhuber /* We need to end the tidaw at track end */ 3222ef19298bSStefan Weinhuber if (!len_to_track_end) { 3223ef19298bSStefan Weinhuber new_track = 1; 3224ef19298bSStefan Weinhuber tidaw_flags = TIDAW_FLAGS_INSERT_CBC; 3225ef19298bSStefan Weinhuber } else 3226ef19298bSStefan Weinhuber tidaw_flags = 0; 3227ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, 3228ef19298bSStefan Weinhuber dst, part_len); 3229cd10502bSJulia Lawall if (IS_ERR(last_tidaw)) { 3230cd10502bSJulia Lawall ret = -EINVAL; 3231cd10502bSJulia Lawall goto out_error; 3232cd10502bSJulia Lawall } 3233ef19298bSStefan Weinhuber dst += part_len; 3234ef19298bSStefan Weinhuber } 3235ef19298bSStefan Weinhuber } 3236ef19298bSStefan Weinhuber } else { 3237ef19298bSStefan Weinhuber rq_for_each_segment(bv, req, iter) { 32387988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 3239ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, 0x00, 32407988613bSKent Overstreet dst, bv.bv_len); 3241cd10502bSJulia Lawall if (IS_ERR(last_tidaw)) { 3242cd10502bSJulia Lawall ret = -EINVAL; 3243cd10502bSJulia Lawall goto out_error; 3244cd10502bSJulia Lawall } 3245ef19298bSStefan Weinhuber } 3246ef19298bSStefan Weinhuber } 3247ef19298bSStefan Weinhuber last_tidaw->flags |= TIDAW_FLAGS_LAST; 3248ef19298bSStefan Weinhuber last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; 3249f3eb5384SStefan Weinhuber itcw_finalize(itcw); 3250f3eb5384SStefan Weinhuber 3251f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 3252f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 3253f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3254ef19298bSStefan Weinhuber cqr->cpmode = 1; 3255f3eb5384SStefan Weinhuber cqr->startdev = startdev; 3256f3eb5384SStefan Weinhuber cqr->memdev = startdev; 3257f3eb5384SStefan Weinhuber cqr->block = block; 32587c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 3259a4d26c6aSStefan Weinhuber cqr->lpm = startdev->path_data.ppm; 32601f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 32611aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 3262f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 3263f3eb5384SStefan Weinhuber return cqr; 3264cd10502bSJulia Lawall out_error: 3265cd10502bSJulia Lawall dasd_sfree_request(cqr, startdev); 3266cd10502bSJulia Lawall return ERR_PTR(ret); 3267f3eb5384SStefan Weinhuber } 3268f3eb5384SStefan Weinhuber 3269f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 3270f3eb5384SStefan Weinhuber struct dasd_block *block, 3271f3eb5384SStefan Weinhuber struct request *req) 3272f3eb5384SStefan Weinhuber { 3273ef19298bSStefan Weinhuber int cmdrtd, cmdwtd; 3274f3eb5384SStefan Weinhuber int use_prefix; 3275ef19298bSStefan Weinhuber int fcx_multitrack; 327645b44d76SStefan Weinhuber struct dasd_eckd_private *private; 3277f3eb5384SStefan Weinhuber struct dasd_device *basedev; 3278f3eb5384SStefan Weinhuber sector_t first_rec, last_rec; 3279f3eb5384SStefan Weinhuber sector_t first_trk, last_trk; 3280f3eb5384SStefan Weinhuber unsigned int first_offs, last_offs; 3281f3eb5384SStefan Weinhuber unsigned int blk_per_trk, blksize; 3282f3eb5384SStefan Weinhuber int cdlspecial; 3283ef19298bSStefan Weinhuber unsigned int data_size; 3284f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 3285f3eb5384SStefan Weinhuber 3286f3eb5384SStefan Weinhuber basedev = block->base; 3287543691a4SSebastian Ott private = basedev->private; 3288f3eb5384SStefan Weinhuber 3289f3eb5384SStefan Weinhuber /* Calculate number of blocks/records per track. */ 3290f3eb5384SStefan Weinhuber blksize = block->bp_block; 3291f3eb5384SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 32926fca97a9SStefan Haberland if (blk_per_trk == 0) 32936fca97a9SStefan Haberland return ERR_PTR(-EINVAL); 3294f3eb5384SStefan Weinhuber /* Calculate record id of first and last block. */ 329583096ebfSTejun Heo first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; 3296f3eb5384SStefan Weinhuber first_offs = sector_div(first_trk, blk_per_trk); 3297f3eb5384SStefan Weinhuber last_rec = last_trk = 329883096ebfSTejun Heo (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 3299f3eb5384SStefan Weinhuber last_offs = sector_div(last_trk, blk_per_trk); 3300f3eb5384SStefan Weinhuber cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); 3301f3eb5384SStefan Weinhuber 3302ef19298bSStefan Weinhuber fcx_multitrack = private->features.feature[40] & 0x20; 3303ef19298bSStefan Weinhuber data_size = blk_rq_bytes(req); 330426a35f37SStefan Weinhuber if (data_size % blksize) 330526a35f37SStefan Weinhuber return ERR_PTR(-EINVAL); 3306ef19298bSStefan Weinhuber /* tpm write request add CBC data on each track boundary */ 3307ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 3308ef19298bSStefan Weinhuber data_size += (last_trk - first_trk) * 4; 3309f3eb5384SStefan Weinhuber 3310f3eb5384SStefan Weinhuber /* is read track data and write track data in command mode supported? */ 3311f3eb5384SStefan Weinhuber cmdrtd = private->features.feature[9] & 0x20; 3312f3eb5384SStefan Weinhuber cmdwtd = private->features.feature[12] & 0x40; 3313f3eb5384SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 3314f3eb5384SStefan Weinhuber 3315f3eb5384SStefan Weinhuber cqr = NULL; 3316f3eb5384SStefan Weinhuber if (cdlspecial || dasd_page_cache) { 3317f3eb5384SStefan Weinhuber /* do nothing, just fall through to the cmd mode single case */ 3318ef19298bSStefan Weinhuber } else if ((data_size <= private->fcx_max_data) 3319ef19298bSStefan Weinhuber && (fcx_multitrack || (first_trk == last_trk))) { 3320f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, 3321f3eb5384SStefan Weinhuber first_rec, last_rec, 3322f3eb5384SStefan Weinhuber first_trk, last_trk, 3323f3eb5384SStefan Weinhuber first_offs, last_offs, 3324f3eb5384SStefan Weinhuber blk_per_trk, blksize); 3325ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3326ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 3327f3eb5384SStefan Weinhuber cqr = NULL; 3328f3eb5384SStefan Weinhuber } else if (use_prefix && 3329f3eb5384SStefan Weinhuber (((rq_data_dir(req) == READ) && cmdrtd) || 3330f3eb5384SStefan Weinhuber ((rq_data_dir(req) == WRITE) && cmdwtd))) { 3331f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, 3332f3eb5384SStefan Weinhuber first_rec, last_rec, 3333f3eb5384SStefan Weinhuber first_trk, last_trk, 3334f3eb5384SStefan Weinhuber first_offs, last_offs, 3335f3eb5384SStefan Weinhuber blk_per_trk, blksize); 3336ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3337ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 3338f3eb5384SStefan Weinhuber cqr = NULL; 3339f3eb5384SStefan Weinhuber } 3340f3eb5384SStefan Weinhuber if (!cqr) 3341f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, 3342f3eb5384SStefan Weinhuber first_rec, last_rec, 3343f3eb5384SStefan Weinhuber first_trk, last_trk, 3344f3eb5384SStefan Weinhuber first_offs, last_offs, 3345f3eb5384SStefan Weinhuber blk_per_trk, blksize); 3346f3eb5384SStefan Weinhuber return cqr; 3347f3eb5384SStefan Weinhuber } 3348f3eb5384SStefan Weinhuber 3349e4dbb0f2SStefan Haberland static struct dasd_ccw_req *dasd_raw_build_cp(struct dasd_device *startdev, 3350e4dbb0f2SStefan Haberland struct dasd_block *block, 3351e4dbb0f2SStefan Haberland struct request *req) 3352e4dbb0f2SStefan Haberland { 3353e4dbb0f2SStefan Haberland unsigned long *idaws; 3354e4dbb0f2SStefan Haberland struct dasd_device *basedev; 3355e4dbb0f2SStefan Haberland struct dasd_ccw_req *cqr; 3356e4dbb0f2SStefan Haberland struct ccw1 *ccw; 3357e4dbb0f2SStefan Haberland struct req_iterator iter; 33587988613bSKent Overstreet struct bio_vec bv; 3359e4dbb0f2SStefan Haberland char *dst; 3360e4dbb0f2SStefan Haberland unsigned char cmd; 3361e4dbb0f2SStefan Haberland unsigned int trkcount; 3362e4dbb0f2SStefan Haberland unsigned int seg_len, len_to_track_end; 3363e4dbb0f2SStefan Haberland unsigned int first_offs; 3364e4dbb0f2SStefan Haberland unsigned int cidaw, cplength, datasize; 3365558b9ef0SStefan Weinhuber sector_t first_trk, last_trk, sectors; 3366558b9ef0SStefan Weinhuber sector_t start_padding_sectors, end_sector_offset, end_padding_sectors; 3367e4dbb0f2SStefan Haberland unsigned int pfx_datasize; 3368e4dbb0f2SStefan Haberland 3369e4dbb0f2SStefan Haberland /* 3370e4dbb0f2SStefan Haberland * raw track access needs to be mutiple of 64k and on 64k boundary 3371558b9ef0SStefan Weinhuber * For read requests we can fix an incorrect alignment by padding 3372558b9ef0SStefan Weinhuber * the request with dummy pages. 3373e4dbb0f2SStefan Haberland */ 3374558b9ef0SStefan Weinhuber start_padding_sectors = blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK; 3375558b9ef0SStefan Weinhuber end_sector_offset = (blk_rq_pos(req) + blk_rq_sectors(req)) % 3376558b9ef0SStefan Weinhuber DASD_RAW_SECTORS_PER_TRACK; 3377558b9ef0SStefan Weinhuber end_padding_sectors = (DASD_RAW_SECTORS_PER_TRACK - end_sector_offset) % 3378558b9ef0SStefan Weinhuber DASD_RAW_SECTORS_PER_TRACK; 3379558b9ef0SStefan Weinhuber basedev = block->base; 3380558b9ef0SStefan Weinhuber if ((start_padding_sectors || end_padding_sectors) && 3381558b9ef0SStefan Weinhuber (rq_data_dir(req) == WRITE)) { 3382558b9ef0SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 3383558b9ef0SStefan Weinhuber "raw write not track aligned (%lu,%lu) req %p", 3384558b9ef0SStefan Weinhuber start_padding_sectors, end_padding_sectors, req); 3385e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EINVAL); 3386e4dbb0f2SStefan Haberland goto out; 3387e4dbb0f2SStefan Haberland } 3388e4dbb0f2SStefan Haberland 3389e4dbb0f2SStefan Haberland first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; 3390e4dbb0f2SStefan Haberland last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / 3391e4dbb0f2SStefan Haberland DASD_RAW_SECTORS_PER_TRACK; 3392e4dbb0f2SStefan Haberland trkcount = last_trk - first_trk + 1; 3393e4dbb0f2SStefan Haberland first_offs = 0; 3394e4dbb0f2SStefan Haberland 3395e4dbb0f2SStefan Haberland if (rq_data_dir(req) == READ) 3396e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_READ_TRACK; 3397e4dbb0f2SStefan Haberland else if (rq_data_dir(req) == WRITE) 3398e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; 3399e4dbb0f2SStefan Haberland else { 3400e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EINVAL); 3401e4dbb0f2SStefan Haberland goto out; 3402e4dbb0f2SStefan Haberland } 3403e4dbb0f2SStefan Haberland 3404e4dbb0f2SStefan Haberland /* 3405e4dbb0f2SStefan Haberland * Raw track based I/O needs IDAWs for each page, 3406e4dbb0f2SStefan Haberland * and not just for 64 bit addresses. 3407e4dbb0f2SStefan Haberland */ 3408e4dbb0f2SStefan Haberland cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; 3409e4dbb0f2SStefan Haberland 3410e4dbb0f2SStefan Haberland /* 1x prefix + one read/write ccw per track */ 3411e4dbb0f2SStefan Haberland cplength = 1 + trkcount; 3412e4dbb0f2SStefan Haberland 3413e4dbb0f2SStefan Haberland /* 3414e4dbb0f2SStefan Haberland * struct PFX_eckd_data has up to 2 byte as extended parameter 3415e4dbb0f2SStefan Haberland * this is needed for write full track and has to be mentioned 341625985edcSLucas De Marchi * separately 3417e4dbb0f2SStefan Haberland * add 8 instead of 2 to keep 8 byte boundary 3418e4dbb0f2SStefan Haberland */ 3419e4dbb0f2SStefan Haberland pfx_datasize = sizeof(struct PFX_eckd_data) + 8; 3420e4dbb0f2SStefan Haberland 3421e4dbb0f2SStefan Haberland datasize = pfx_datasize + cidaw * sizeof(unsigned long long); 3422e4dbb0f2SStefan Haberland 3423e4dbb0f2SStefan Haberland /* Allocate the ccw request. */ 3424e4dbb0f2SStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 3425e4dbb0f2SStefan Haberland datasize, startdev); 3426e4dbb0f2SStefan Haberland if (IS_ERR(cqr)) 3427e4dbb0f2SStefan Haberland goto out; 3428e4dbb0f2SStefan Haberland ccw = cqr->cpaddr; 3429e4dbb0f2SStefan Haberland 3430e4dbb0f2SStefan Haberland if (prefix_LRE(ccw++, cqr->data, first_trk, last_trk, cmd, 3431e4dbb0f2SStefan Haberland basedev, startdev, 1 /* format */, first_offs + 1, 3432e4dbb0f2SStefan Haberland trkcount, 0, 0) == -EAGAIN) { 3433e4dbb0f2SStefan Haberland /* Clock not in sync and XRC is enabled. 3434e4dbb0f2SStefan Haberland * Try again later. 3435e4dbb0f2SStefan Haberland */ 3436e4dbb0f2SStefan Haberland dasd_sfree_request(cqr, startdev); 3437e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EAGAIN); 3438e4dbb0f2SStefan Haberland goto out; 3439e4dbb0f2SStefan Haberland } 3440e4dbb0f2SStefan Haberland 3441e4dbb0f2SStefan Haberland idaws = (unsigned long *)(cqr->data + pfx_datasize); 3442e4dbb0f2SStefan Haberland len_to_track_end = 0; 3443558b9ef0SStefan Weinhuber if (start_padding_sectors) { 3444558b9ef0SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 3445558b9ef0SStefan Weinhuber ccw->cmd_code = cmd; 3446558b9ef0SStefan Weinhuber /* maximum 3390 track size */ 3447558b9ef0SStefan Weinhuber ccw->count = 57326; 3448558b9ef0SStefan Weinhuber /* 64k map to one track */ 3449558b9ef0SStefan Weinhuber len_to_track_end = 65536 - start_padding_sectors * 512; 3450558b9ef0SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 3451558b9ef0SStefan Weinhuber ccw->flags |= CCW_FLAG_IDA; 3452558b9ef0SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3453558b9ef0SStefan Weinhuber ccw++; 3454558b9ef0SStefan Weinhuber for (sectors = 0; sectors < start_padding_sectors; sectors += 8) 3455558b9ef0SStefan Weinhuber idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 3456558b9ef0SStefan Weinhuber } 3457e4dbb0f2SStefan Haberland rq_for_each_segment(bv, req, iter) { 34587988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 34597988613bSKent Overstreet seg_len = bv.bv_len; 3460558b9ef0SStefan Weinhuber if (cmd == DASD_ECKD_CCW_READ_TRACK) 3461558b9ef0SStefan Weinhuber memset(dst, 0, seg_len); 3462e4dbb0f2SStefan Haberland if (!len_to_track_end) { 3463e4dbb0f2SStefan Haberland ccw[-1].flags |= CCW_FLAG_CC; 3464e4dbb0f2SStefan Haberland ccw->cmd_code = cmd; 3465e4dbb0f2SStefan Haberland /* maximum 3390 track size */ 3466e4dbb0f2SStefan Haberland ccw->count = 57326; 3467e4dbb0f2SStefan Haberland /* 64k map to one track */ 3468e4dbb0f2SStefan Haberland len_to_track_end = 65536; 3469e4dbb0f2SStefan Haberland ccw->cda = (__u32)(addr_t)idaws; 3470e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_IDA; 3471e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 3472e4dbb0f2SStefan Haberland ccw++; 3473e4dbb0f2SStefan Haberland } 3474e4dbb0f2SStefan Haberland len_to_track_end -= seg_len; 3475e4dbb0f2SStefan Haberland idaws = idal_create_words(idaws, dst, seg_len); 3476e4dbb0f2SStefan Haberland } 3477558b9ef0SStefan Weinhuber for (sectors = 0; sectors < end_padding_sectors; sectors += 8) 3478558b9ef0SStefan Weinhuber idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 3479e4dbb0f2SStefan Haberland if (blk_noretry_request(req) || 3480e4dbb0f2SStefan Haberland block->base->features & DASD_FEATURE_FAILFAST) 3481e4dbb0f2SStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3482e4dbb0f2SStefan Haberland cqr->startdev = startdev; 3483e4dbb0f2SStefan Haberland cqr->memdev = startdev; 3484e4dbb0f2SStefan Haberland cqr->block = block; 3485e4dbb0f2SStefan Haberland cqr->expires = startdev->default_expires * HZ; 3486e4dbb0f2SStefan Haberland cqr->lpm = startdev->path_data.ppm; 34871f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 34881aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 3489e4dbb0f2SStefan Haberland cqr->status = DASD_CQR_FILLED; 3490e4dbb0f2SStefan Haberland 3491e4dbb0f2SStefan Haberland if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN) 3492e4dbb0f2SStefan Haberland cqr = NULL; 3493e4dbb0f2SStefan Haberland out: 3494e4dbb0f2SStefan Haberland return cqr; 3495e4dbb0f2SStefan Haberland } 3496e4dbb0f2SStefan Haberland 3497e4dbb0f2SStefan Haberland 34981da177e4SLinus Torvalds static int 34991da177e4SLinus Torvalds dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 35001da177e4SLinus Torvalds { 35011da177e4SLinus Torvalds struct dasd_eckd_private *private; 35021da177e4SLinus Torvalds struct ccw1 *ccw; 35035705f702SNeilBrown struct req_iterator iter; 35047988613bSKent Overstreet struct bio_vec bv; 35051da177e4SLinus Torvalds char *dst, *cda; 35061da177e4SLinus Torvalds unsigned int blksize, blk_per_trk, off; 35071da177e4SLinus Torvalds sector_t recid; 35085705f702SNeilBrown int status; 35091da177e4SLinus Torvalds 35101da177e4SLinus Torvalds if (!dasd_page_cache) 35111da177e4SLinus Torvalds goto out; 3512543691a4SSebastian Ott private = cqr->block->base->private; 35138e09f215SStefan Weinhuber blksize = cqr->block->bp_block; 35141da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 351583096ebfSTejun Heo recid = blk_rq_pos(req) >> cqr->block->s2b_shift; 35161da177e4SLinus Torvalds ccw = cqr->cpaddr; 35171da177e4SLinus Torvalds /* Skip over define extent & locate record. */ 35181da177e4SLinus Torvalds ccw++; 35191da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 35201da177e4SLinus Torvalds ccw++; 35215705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 35227988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 35237988613bSKent Overstreet for (off = 0; off < bv.bv_len; off += blksize) { 35241da177e4SLinus Torvalds /* Skip locate record. */ 35251da177e4SLinus Torvalds if (private->uses_cdl && recid <= 2*blk_per_trk) 35261da177e4SLinus Torvalds ccw++; 35271da177e4SLinus Torvalds if (dst) { 35281da177e4SLinus Torvalds if (ccw->flags & CCW_FLAG_IDA) 35291da177e4SLinus Torvalds cda = *((char **)((addr_t) ccw->cda)); 35301da177e4SLinus Torvalds else 35311da177e4SLinus Torvalds cda = (char *)((addr_t) ccw->cda); 35321da177e4SLinus Torvalds if (dst != cda) { 35331da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 35347988613bSKent Overstreet memcpy(dst, cda, bv.bv_len); 35351da177e4SLinus Torvalds kmem_cache_free(dasd_page_cache, 35361da177e4SLinus Torvalds (void *)((addr_t)cda & PAGE_MASK)); 35371da177e4SLinus Torvalds } 35381da177e4SLinus Torvalds dst = NULL; 35391da177e4SLinus Torvalds } 35401da177e4SLinus Torvalds ccw++; 35411da177e4SLinus Torvalds recid++; 35421da177e4SLinus Torvalds } 35431da177e4SLinus Torvalds } 35441da177e4SLinus Torvalds out: 35451da177e4SLinus Torvalds status = cqr->status == DASD_CQR_DONE; 35468e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 35471da177e4SLinus Torvalds return status; 35481da177e4SLinus Torvalds } 35491da177e4SLinus Torvalds 35508e09f215SStefan Weinhuber /* 3551f3eb5384SStefan Weinhuber * Modify ccw/tcw in cqr so it can be started on a base device. 35528e09f215SStefan Weinhuber * 35538e09f215SStefan Weinhuber * Note that this is not enough to restart the cqr! 35548e09f215SStefan Weinhuber * Either reset cqr->startdev as well (summary unit check handling) 35558e09f215SStefan Weinhuber * or restart via separate cqr (as in ERP handling). 35568e09f215SStefan Weinhuber */ 35578e09f215SStefan Weinhuber void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 35588e09f215SStefan Weinhuber { 35598e09f215SStefan Weinhuber struct ccw1 *ccw; 35608e09f215SStefan Weinhuber struct PFX_eckd_data *pfxdata; 3561f3eb5384SStefan Weinhuber struct tcw *tcw; 3562f3eb5384SStefan Weinhuber struct tccb *tccb; 3563f3eb5384SStefan Weinhuber struct dcw *dcw; 35648e09f215SStefan Weinhuber 3565f3eb5384SStefan Weinhuber if (cqr->cpmode == 1) { 3566f3eb5384SStefan Weinhuber tcw = cqr->cpaddr; 3567f3eb5384SStefan Weinhuber tccb = tcw_get_tccb(tcw); 3568f3eb5384SStefan Weinhuber dcw = (struct dcw *)&tccb->tca[0]; 3569f3eb5384SStefan Weinhuber pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; 3570f3eb5384SStefan Weinhuber pfxdata->validity.verify_base = 0; 3571f3eb5384SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 3572f3eb5384SStefan Weinhuber } else { 35738e09f215SStefan Weinhuber ccw = cqr->cpaddr; 35748e09f215SStefan Weinhuber pfxdata = cqr->data; 35758e09f215SStefan Weinhuber if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 35768e09f215SStefan Weinhuber pfxdata->validity.verify_base = 0; 35778e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 35788e09f215SStefan Weinhuber } 35798e09f215SStefan Weinhuber } 3580f3eb5384SStefan Weinhuber } 35818e09f215SStefan Weinhuber 35828e09f215SStefan Weinhuber #define DASD_ECKD_CHANQ_MAX_SIZE 4 35838e09f215SStefan Weinhuber 35848e09f215SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 35858e09f215SStefan Weinhuber struct dasd_block *block, 35868e09f215SStefan Weinhuber struct request *req) 35878e09f215SStefan Weinhuber { 35888e09f215SStefan Weinhuber struct dasd_eckd_private *private; 35898e09f215SStefan Weinhuber struct dasd_device *startdev; 35908e09f215SStefan Weinhuber unsigned long flags; 35918e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 35928e09f215SStefan Weinhuber 35938e09f215SStefan Weinhuber startdev = dasd_alias_get_start_dev(base); 35948e09f215SStefan Weinhuber if (!startdev) 35958e09f215SStefan Weinhuber startdev = base; 3596543691a4SSebastian Ott private = startdev->private; 35978e09f215SStefan Weinhuber if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 35988e09f215SStefan Weinhuber return ERR_PTR(-EBUSY); 35998e09f215SStefan Weinhuber 36008e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 36018e09f215SStefan Weinhuber private->count++; 3602e4dbb0f2SStefan Haberland if ((base->features & DASD_FEATURE_USERAW)) 3603e4dbb0f2SStefan Haberland cqr = dasd_raw_build_cp(startdev, block, req); 3604e4dbb0f2SStefan Haberland else 36058e09f215SStefan Weinhuber cqr = dasd_eckd_build_cp(startdev, block, req); 36068e09f215SStefan Weinhuber if (IS_ERR(cqr)) 36078e09f215SStefan Weinhuber private->count--; 36088e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 36098e09f215SStefan Weinhuber return cqr; 36108e09f215SStefan Weinhuber } 36118e09f215SStefan Weinhuber 36128e09f215SStefan Weinhuber static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 36138e09f215SStefan Weinhuber struct request *req) 36148e09f215SStefan Weinhuber { 36158e09f215SStefan Weinhuber struct dasd_eckd_private *private; 36168e09f215SStefan Weinhuber unsigned long flags; 36178e09f215SStefan Weinhuber 36188e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 3619543691a4SSebastian Ott private = cqr->memdev->private; 36208e09f215SStefan Weinhuber private->count--; 36218e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 36228e09f215SStefan Weinhuber return dasd_eckd_free_cp(cqr, req); 36238e09f215SStefan Weinhuber } 36248e09f215SStefan Weinhuber 36251da177e4SLinus Torvalds static int 36261da177e4SLinus Torvalds dasd_eckd_fill_info(struct dasd_device * device, 36271da177e4SLinus Torvalds struct dasd_information2_t * info) 36281da177e4SLinus Torvalds { 3629543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 36301da177e4SLinus Torvalds 36311da177e4SLinus Torvalds info->label_block = 2; 36321da177e4SLinus Torvalds info->FBA_layout = private->uses_cdl ? 0 : 1; 36331da177e4SLinus Torvalds info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 3634543691a4SSebastian Ott info->characteristics_size = sizeof(private->rdc_data); 36351da177e4SLinus Torvalds memcpy(info->characteristics, &private->rdc_data, 3636543691a4SSebastian Ott sizeof(private->rdc_data)); 36374abb08c2SStefan Weinhuber info->confdata_size = min((unsigned long)private->conf_len, 36384abb08c2SStefan Weinhuber sizeof(info->configuration_data)); 36394abb08c2SStefan Weinhuber memcpy(info->configuration_data, private->conf_data, 36404abb08c2SStefan Weinhuber info->confdata_size); 36411da177e4SLinus Torvalds return 0; 36421da177e4SLinus Torvalds } 36431da177e4SLinus Torvalds 36441da177e4SLinus Torvalds /* 36451da177e4SLinus Torvalds * SECTION: ioctl functions for eckd devices. 36461da177e4SLinus Torvalds */ 36471da177e4SLinus Torvalds 36481da177e4SLinus Torvalds /* 36491da177e4SLinus Torvalds * Release device ioctl. 36501da177e4SLinus Torvalds * Buils a channel programm to releases a prior reserved 36511da177e4SLinus Torvalds * (see dasd_eckd_reserve) device. 36521da177e4SLinus Torvalds */ 36531da177e4SLinus Torvalds static int 36541107ccfbSChristoph Hellwig dasd_eckd_release(struct dasd_device *device) 36551da177e4SLinus Torvalds { 36561da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 36571da177e4SLinus Torvalds int rc; 3658f3eb5384SStefan Weinhuber struct ccw1 *ccw; 3659f932bceaSStefan Weinhuber int useglobal; 36601da177e4SLinus Torvalds 36611da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 36621da177e4SLinus Torvalds return -EACCES; 36631da177e4SLinus Torvalds 3664f932bceaSStefan Weinhuber useglobal = 0; 366568b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 36661da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3667f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3668f932bceaSStefan Weinhuber useglobal = 1; 3669f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3670f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3671f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3672f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3673f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3674f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3675f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 36761da177e4SLinus Torvalds } 3677f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 3678f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RELEASE; 3679f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3680f3eb5384SStefan Weinhuber ccw->count = 32; 3681f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 36828e09f215SStefan Weinhuber cqr->startdev = device; 36838e09f215SStefan Weinhuber cqr->memdev = device; 36841da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 36851c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3686336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 36871da177e4SLinus Torvalds cqr->expires = 2 * HZ; 36881aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 36891da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 36901da177e4SLinus Torvalds 36911da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 36925a27e60dSStefan Weinhuber if (!rc) 36935a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 36941da177e4SLinus Torvalds 3695f932bceaSStefan Weinhuber if (useglobal) 3696f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3697f932bceaSStefan Weinhuber else 36988e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 36991da177e4SLinus Torvalds return rc; 37001da177e4SLinus Torvalds } 37011da177e4SLinus Torvalds 37021da177e4SLinus Torvalds /* 37031da177e4SLinus Torvalds * Reserve device ioctl. 37041da177e4SLinus Torvalds * Options are set to 'synchronous wait for interrupt' and 37051da177e4SLinus Torvalds * 'timeout the request'. This leads to a terminate IO if 37061da177e4SLinus Torvalds * the interrupt is outstanding for a certain time. 37071da177e4SLinus Torvalds */ 37081da177e4SLinus Torvalds static int 37091107ccfbSChristoph Hellwig dasd_eckd_reserve(struct dasd_device *device) 37101da177e4SLinus Torvalds { 37111da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 37121da177e4SLinus Torvalds int rc; 3713f3eb5384SStefan Weinhuber struct ccw1 *ccw; 3714f932bceaSStefan Weinhuber int useglobal; 37151da177e4SLinus Torvalds 37161da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 37171da177e4SLinus Torvalds return -EACCES; 37181da177e4SLinus Torvalds 3719f932bceaSStefan Weinhuber useglobal = 0; 372068b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 37211da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3722f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3723f932bceaSStefan Weinhuber useglobal = 1; 3724f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3725f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3726f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3727f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3728f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3729f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3730f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 37311da177e4SLinus Torvalds } 3732f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 3733f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RESERVE; 3734f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3735f3eb5384SStefan Weinhuber ccw->count = 32; 3736f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 37378e09f215SStefan Weinhuber cqr->startdev = device; 37388e09f215SStefan Weinhuber cqr->memdev = device; 37391da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 37401c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3741336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 37421da177e4SLinus Torvalds cqr->expires = 2 * HZ; 37431aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 37441da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 37451da177e4SLinus Torvalds 37461da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 37475a27e60dSStefan Weinhuber if (!rc) 37485a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 37491da177e4SLinus Torvalds 3750f932bceaSStefan Weinhuber if (useglobal) 3751f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3752f932bceaSStefan Weinhuber else 37538e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 37541da177e4SLinus Torvalds return rc; 37551da177e4SLinus Torvalds } 37561da177e4SLinus Torvalds 37571da177e4SLinus Torvalds /* 37581da177e4SLinus Torvalds * Steal lock ioctl - unconditional reserve device. 37591da177e4SLinus Torvalds * Buils a channel programm to break a device's reservation. 37601da177e4SLinus Torvalds * (unconditional reserve) 37611da177e4SLinus Torvalds */ 37621da177e4SLinus Torvalds static int 37631107ccfbSChristoph Hellwig dasd_eckd_steal_lock(struct dasd_device *device) 37641da177e4SLinus Torvalds { 37651da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 37661da177e4SLinus Torvalds int rc; 3767f3eb5384SStefan Weinhuber struct ccw1 *ccw; 3768f932bceaSStefan Weinhuber int useglobal; 37691da177e4SLinus Torvalds 37701da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 37711da177e4SLinus Torvalds return -EACCES; 37721da177e4SLinus Torvalds 3773f932bceaSStefan Weinhuber useglobal = 0; 377468b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 37751da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3776f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3777f932bceaSStefan Weinhuber useglobal = 1; 3778f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3779f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3780f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3781f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3782f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3783f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3784f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 37851da177e4SLinus Torvalds } 3786f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 3787f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SLCK; 3788f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3789f3eb5384SStefan Weinhuber ccw->count = 32; 3790f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 37918e09f215SStefan Weinhuber cqr->startdev = device; 37928e09f215SStefan Weinhuber cqr->memdev = device; 37931da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 37941c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3795336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 37961da177e4SLinus Torvalds cqr->expires = 2 * HZ; 37971aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 37981da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 37991da177e4SLinus Torvalds 38001da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 38015a27e60dSStefan Weinhuber if (!rc) 38025a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 38031da177e4SLinus Torvalds 3804f932bceaSStefan Weinhuber if (useglobal) 3805f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3806f932bceaSStefan Weinhuber else 38078e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 38081da177e4SLinus Torvalds return rc; 38091da177e4SLinus Torvalds } 38101da177e4SLinus Torvalds 38111da177e4SLinus Torvalds /* 3812196339f1SStefan Weinhuber * SNID - Sense Path Group ID 3813196339f1SStefan Weinhuber * This ioctl may be used in situations where I/O is stalled due to 3814196339f1SStefan Weinhuber * a reserve, so if the normal dasd_smalloc_request fails, we use the 3815196339f1SStefan Weinhuber * preallocated dasd_reserve_req. 3816196339f1SStefan Weinhuber */ 3817196339f1SStefan Weinhuber static int dasd_eckd_snid(struct dasd_device *device, 3818196339f1SStefan Weinhuber void __user *argp) 3819196339f1SStefan Weinhuber { 3820196339f1SStefan Weinhuber struct dasd_ccw_req *cqr; 3821196339f1SStefan Weinhuber int rc; 3822196339f1SStefan Weinhuber struct ccw1 *ccw; 3823196339f1SStefan Weinhuber int useglobal; 3824196339f1SStefan Weinhuber struct dasd_snid_ioctl_data usrparm; 3825196339f1SStefan Weinhuber 3826196339f1SStefan Weinhuber if (!capable(CAP_SYS_ADMIN)) 3827196339f1SStefan Weinhuber return -EACCES; 3828196339f1SStefan Weinhuber 3829196339f1SStefan Weinhuber if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 3830196339f1SStefan Weinhuber return -EFAULT; 3831196339f1SStefan Weinhuber 3832196339f1SStefan Weinhuber useglobal = 0; 3833196339f1SStefan Weinhuber cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 3834196339f1SStefan Weinhuber sizeof(struct dasd_snid_data), device); 3835196339f1SStefan Weinhuber if (IS_ERR(cqr)) { 3836196339f1SStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3837196339f1SStefan Weinhuber useglobal = 1; 3838196339f1SStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3839196339f1SStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3840196339f1SStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3841196339f1SStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3842196339f1SStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3843196339f1SStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3844196339f1SStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 3845196339f1SStefan Weinhuber } 3846196339f1SStefan Weinhuber ccw = cqr->cpaddr; 3847196339f1SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SNID; 3848196339f1SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3849196339f1SStefan Weinhuber ccw->count = 12; 3850196339f1SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 3851196339f1SStefan Weinhuber cqr->startdev = device; 3852196339f1SStefan Weinhuber cqr->memdev = device; 3853196339f1SStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3854196339f1SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 38555a27e60dSStefan Weinhuber set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 3856196339f1SStefan Weinhuber cqr->retries = 5; 3857196339f1SStefan Weinhuber cqr->expires = 10 * HZ; 38581aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 3859196339f1SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 3860196339f1SStefan Weinhuber cqr->lpm = usrparm.path_mask; 3861196339f1SStefan Weinhuber 3862196339f1SStefan Weinhuber rc = dasd_sleep_on_immediatly(cqr); 3863196339f1SStefan Weinhuber /* verify that I/O processing didn't modify the path mask */ 3864196339f1SStefan Weinhuber if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) 3865196339f1SStefan Weinhuber rc = -EIO; 3866196339f1SStefan Weinhuber if (!rc) { 3867196339f1SStefan Weinhuber usrparm.data = *((struct dasd_snid_data *)cqr->data); 3868196339f1SStefan Weinhuber if (copy_to_user(argp, &usrparm, sizeof(usrparm))) 3869196339f1SStefan Weinhuber rc = -EFAULT; 3870196339f1SStefan Weinhuber } 3871196339f1SStefan Weinhuber 3872196339f1SStefan Weinhuber if (useglobal) 3873196339f1SStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3874196339f1SStefan Weinhuber else 3875196339f1SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 3876196339f1SStefan Weinhuber return rc; 3877196339f1SStefan Weinhuber } 3878196339f1SStefan Weinhuber 3879196339f1SStefan Weinhuber /* 38801da177e4SLinus Torvalds * Read performance statistics 38811da177e4SLinus Torvalds */ 38821da177e4SLinus Torvalds static int 38831107ccfbSChristoph Hellwig dasd_eckd_performance(struct dasd_device *device, void __user *argp) 38841da177e4SLinus Torvalds { 38851da177e4SLinus Torvalds struct dasd_psf_prssd_data *prssdp; 38861da177e4SLinus Torvalds struct dasd_rssd_perf_stats_t *stats; 38871da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 38881da177e4SLinus Torvalds struct ccw1 *ccw; 38891da177e4SLinus Torvalds int rc; 38901da177e4SLinus Torvalds 389168b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 38921da177e4SLinus Torvalds (sizeof(struct dasd_psf_prssd_data) + 38931da177e4SLinus Torvalds sizeof(struct dasd_rssd_perf_stats_t)), 38941da177e4SLinus Torvalds device); 38951da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3896fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 38971da177e4SLinus Torvalds "Could not allocate initialization request"); 38981da177e4SLinus Torvalds return PTR_ERR(cqr); 38991da177e4SLinus Torvalds } 39008e09f215SStefan Weinhuber cqr->startdev = device; 39018e09f215SStefan Weinhuber cqr->memdev = device; 39021da177e4SLinus Torvalds cqr->retries = 0; 3903eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 39041da177e4SLinus Torvalds cqr->expires = 10 * HZ; 39051da177e4SLinus Torvalds 39061da177e4SLinus Torvalds /* Prepare for Read Subsystem Data */ 39071da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 39081da177e4SLinus Torvalds memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 39091da177e4SLinus Torvalds prssdp->order = PSF_ORDER_PRSSD; 39105d67d164SJoe Perches prssdp->suborder = 0x01; /* Performance Statistics */ 39111da177e4SLinus Torvalds prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 39121da177e4SLinus Torvalds 39131da177e4SLinus Torvalds ccw = cqr->cpaddr; 39141da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_PSF; 39151da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_psf_prssd_data); 39161da177e4SLinus Torvalds ccw->flags |= CCW_FLAG_CC; 39171da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) prssdp; 39181da177e4SLinus Torvalds 39191da177e4SLinus Torvalds /* Read Subsystem Data - Performance Statistics */ 39201da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 39211da177e4SLinus Torvalds memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 39221da177e4SLinus Torvalds 39231da177e4SLinus Torvalds ccw++; 39241da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_RSSD; 39251da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 39261da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) stats; 39271da177e4SLinus Torvalds 39281aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 39291da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 39301da177e4SLinus Torvalds rc = dasd_sleep_on(cqr); 39311da177e4SLinus Torvalds if (rc == 0) { 39321da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 39331da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 39341107ccfbSChristoph Hellwig if (copy_to_user(argp, stats, 39351107ccfbSChristoph Hellwig sizeof(struct dasd_rssd_perf_stats_t))) 39361107ccfbSChristoph Hellwig rc = -EFAULT; 39371da177e4SLinus Torvalds } 39388e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 39391da177e4SLinus Torvalds return rc; 39401da177e4SLinus Torvalds } 39411da177e4SLinus Torvalds 39421da177e4SLinus Torvalds /* 39431da177e4SLinus Torvalds * Get attributes (cache operations) 39441da177e4SLinus Torvalds * Returnes the cache attributes used in Define Extend (DE). 39451da177e4SLinus Torvalds */ 39461da177e4SLinus Torvalds static int 39471107ccfbSChristoph Hellwig dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 39481da177e4SLinus Torvalds { 3949543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 39501107ccfbSChristoph Hellwig struct attrib_data_t attrib = private->attrib; 39511da177e4SLinus Torvalds int rc; 39521da177e4SLinus Torvalds 39531da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 39541da177e4SLinus Torvalds return -EACCES; 39551107ccfbSChristoph Hellwig if (!argp) 39561da177e4SLinus Torvalds return -EINVAL; 39571da177e4SLinus Torvalds 39581107ccfbSChristoph Hellwig rc = 0; 39591107ccfbSChristoph Hellwig if (copy_to_user(argp, (long *) &attrib, 39601107ccfbSChristoph Hellwig sizeof(struct attrib_data_t))) 39611107ccfbSChristoph Hellwig rc = -EFAULT; 39621da177e4SLinus Torvalds 39631da177e4SLinus Torvalds return rc; 39641da177e4SLinus Torvalds } 39651da177e4SLinus Torvalds 39661da177e4SLinus Torvalds /* 39671da177e4SLinus Torvalds * Set attributes (cache operations) 39681da177e4SLinus Torvalds * Stores the attributes for cache operation to be used in Define Extend (DE). 39691da177e4SLinus Torvalds */ 39701da177e4SLinus Torvalds static int 39711107ccfbSChristoph Hellwig dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 39721da177e4SLinus Torvalds { 3973543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 39741da177e4SLinus Torvalds struct attrib_data_t attrib; 39751da177e4SLinus Torvalds 39761da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 39771da177e4SLinus Torvalds return -EACCES; 39781107ccfbSChristoph Hellwig if (!argp) 39791da177e4SLinus Torvalds return -EINVAL; 39801da177e4SLinus Torvalds 39811107ccfbSChristoph Hellwig if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 39821da177e4SLinus Torvalds return -EFAULT; 39831da177e4SLinus Torvalds private->attrib = attrib; 39841da177e4SLinus Torvalds 3985fc19f381SStefan Haberland dev_info(&device->cdev->dev, 3986fc19f381SStefan Haberland "The DASD cache mode was set to %x (%i cylinder prestage)\n", 39871da177e4SLinus Torvalds private->attrib.operation, private->attrib.nr_cyl); 39881da177e4SLinus Torvalds return 0; 39891da177e4SLinus Torvalds } 39901da177e4SLinus Torvalds 3991ab1d848fSNigel Hislop /* 3992ab1d848fSNigel Hislop * Issue syscall I/O to EMC Symmetrix array. 3993ab1d848fSNigel Hislop * CCWs are PSF and RSSD 3994ab1d848fSNigel Hislop */ 3995ab1d848fSNigel Hislop static int dasd_symm_io(struct dasd_device *device, void __user *argp) 3996ab1d848fSNigel Hislop { 3997ab1d848fSNigel Hislop struct dasd_symmio_parms usrparm; 3998ab1d848fSNigel Hislop char *psf_data, *rssd_result; 3999ab1d848fSNigel Hislop struct dasd_ccw_req *cqr; 4000ab1d848fSNigel Hislop struct ccw1 *ccw; 400152898025SNigel Hislop char psf0, psf1; 4002ab1d848fSNigel Hislop int rc; 4003ab1d848fSNigel Hislop 400452898025SNigel Hislop if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) 400552898025SNigel Hislop return -EACCES; 400652898025SNigel Hislop psf0 = psf1 = 0; 400752898025SNigel Hislop 4008ab1d848fSNigel Hislop /* Copy parms from caller */ 4009ab1d848fSNigel Hislop rc = -EFAULT; 4010ab1d848fSNigel Hislop if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 4011ab1d848fSNigel Hislop goto out; 401292d62891SHeiko Carstens if (is_compat_task()) { 4013ab1d848fSNigel Hislop /* Make sure pointers are sane even on 31 bit. */ 4014ab1d848fSNigel Hislop rc = -EINVAL; 4015f8b06859SHeiko Carstens if ((usrparm.psf_data >> 32) != 0) 4016ab1d848fSNigel Hislop goto out; 4017f8b06859SHeiko Carstens if ((usrparm.rssd_result >> 32) != 0) 4018f8b06859SHeiko Carstens goto out; 4019f8b06859SHeiko Carstens usrparm.psf_data &= 0x7fffffffULL; 4020f8b06859SHeiko Carstens usrparm.rssd_result &= 0x7fffffffULL; 4021ab1d848fSNigel Hislop } 4022ab1d848fSNigel Hislop /* alloc I/O data area */ 4023ab1d848fSNigel Hislop psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 4024ab1d848fSNigel Hislop rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 4025ab1d848fSNigel Hislop if (!psf_data || !rssd_result) { 4026ab1d848fSNigel Hislop rc = -ENOMEM; 4027ab1d848fSNigel Hislop goto out_free; 4028ab1d848fSNigel Hislop } 4029ab1d848fSNigel Hislop 4030ab1d848fSNigel Hislop /* get syscall header from user space */ 4031ab1d848fSNigel Hislop rc = -EFAULT; 4032ab1d848fSNigel Hislop if (copy_from_user(psf_data, 4033ab1d848fSNigel Hislop (void __user *)(unsigned long) usrparm.psf_data, 4034ab1d848fSNigel Hislop usrparm.psf_data_len)) 4035ab1d848fSNigel Hislop goto out_free; 403652898025SNigel Hislop psf0 = psf_data[0]; 403752898025SNigel Hislop psf1 = psf_data[1]; 4038ab1d848fSNigel Hislop 4039ab1d848fSNigel Hislop /* setup CCWs for PSF + RSSD */ 404068b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device); 4041ab1d848fSNigel Hislop if (IS_ERR(cqr)) { 4042fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 4043ab1d848fSNigel Hislop "Could not allocate initialization request"); 4044ab1d848fSNigel Hislop rc = PTR_ERR(cqr); 4045ab1d848fSNigel Hislop goto out_free; 4046ab1d848fSNigel Hislop } 4047ab1d848fSNigel Hislop 4048ab1d848fSNigel Hislop cqr->startdev = device; 4049ab1d848fSNigel Hislop cqr->memdev = device; 4050ab1d848fSNigel Hislop cqr->retries = 3; 4051ab1d848fSNigel Hislop cqr->expires = 10 * HZ; 40521aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 4053ab1d848fSNigel Hislop cqr->status = DASD_CQR_FILLED; 4054ab1d848fSNigel Hislop 4055ab1d848fSNigel Hislop /* Build the ccws */ 4056ab1d848fSNigel Hislop ccw = cqr->cpaddr; 4057ab1d848fSNigel Hislop 4058ab1d848fSNigel Hislop /* PSF ccw */ 4059ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_PSF; 4060ab1d848fSNigel Hislop ccw->count = usrparm.psf_data_len; 4061ab1d848fSNigel Hislop ccw->flags |= CCW_FLAG_CC; 4062ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) psf_data; 4063ab1d848fSNigel Hislop 4064ab1d848fSNigel Hislop ccw++; 4065ab1d848fSNigel Hislop 4066ab1d848fSNigel Hislop /* RSSD ccw */ 4067ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_RSSD; 4068ab1d848fSNigel Hislop ccw->count = usrparm.rssd_result_len; 4069ab1d848fSNigel Hislop ccw->flags = CCW_FLAG_SLI ; 4070ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) rssd_result; 4071ab1d848fSNigel Hislop 4072ab1d848fSNigel Hislop rc = dasd_sleep_on(cqr); 4073ab1d848fSNigel Hislop if (rc) 4074ab1d848fSNigel Hislop goto out_sfree; 4075ab1d848fSNigel Hislop 4076ab1d848fSNigel Hislop rc = -EFAULT; 4077ab1d848fSNigel Hislop if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 4078ab1d848fSNigel Hislop rssd_result, usrparm.rssd_result_len)) 4079ab1d848fSNigel Hislop goto out_sfree; 4080ab1d848fSNigel Hislop rc = 0; 4081ab1d848fSNigel Hislop 4082ab1d848fSNigel Hislop out_sfree: 4083ab1d848fSNigel Hislop dasd_sfree_request(cqr, cqr->memdev); 4084ab1d848fSNigel Hislop out_free: 4085ab1d848fSNigel Hislop kfree(rssd_result); 4086ab1d848fSNigel Hislop kfree(psf_data); 4087ab1d848fSNigel Hislop out: 408852898025SNigel Hislop DBF_DEV_EVENT(DBF_WARNING, device, 408952898025SNigel Hislop "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", 409052898025SNigel Hislop (int) psf0, (int) psf1, rc); 4091ab1d848fSNigel Hislop return rc; 4092ab1d848fSNigel Hislop } 4093ab1d848fSNigel Hislop 40941107ccfbSChristoph Hellwig static int 40958e09f215SStefan Weinhuber dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 40961107ccfbSChristoph Hellwig { 40978e09f215SStefan Weinhuber struct dasd_device *device = block->base; 40988e09f215SStefan Weinhuber 40991107ccfbSChristoph Hellwig switch (cmd) { 41001107ccfbSChristoph Hellwig case BIODASDGATTR: 41011107ccfbSChristoph Hellwig return dasd_eckd_get_attrib(device, argp); 41021107ccfbSChristoph Hellwig case BIODASDSATTR: 41031107ccfbSChristoph Hellwig return dasd_eckd_set_attrib(device, argp); 41041107ccfbSChristoph Hellwig case BIODASDPSRD: 41051107ccfbSChristoph Hellwig return dasd_eckd_performance(device, argp); 41061107ccfbSChristoph Hellwig case BIODASDRLSE: 41071107ccfbSChristoph Hellwig return dasd_eckd_release(device); 41081107ccfbSChristoph Hellwig case BIODASDRSRV: 41091107ccfbSChristoph Hellwig return dasd_eckd_reserve(device); 41101107ccfbSChristoph Hellwig case BIODASDSLCK: 41111107ccfbSChristoph Hellwig return dasd_eckd_steal_lock(device); 4112196339f1SStefan Weinhuber case BIODASDSNID: 4113196339f1SStefan Weinhuber return dasd_eckd_snid(device, argp); 4114ab1d848fSNigel Hislop case BIODASDSYMMIO: 4115ab1d848fSNigel Hislop return dasd_symm_io(device, argp); 41161107ccfbSChristoph Hellwig default: 41176b79d14eSHeiko Carstens return -ENOTTY; 41181107ccfbSChristoph Hellwig } 41191107ccfbSChristoph Hellwig } 41201107ccfbSChristoph Hellwig 41211da177e4SLinus Torvalds /* 4122445b5b49SHorst Hummel * Dump the range of CCWs into 'page' buffer 4123445b5b49SHorst Hummel * and return number of printed chars. 4124445b5b49SHorst Hummel */ 41254d284cacSHeiko Carstens static int 4126445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 4127445b5b49SHorst Hummel { 4128445b5b49SHorst Hummel int len, count; 4129445b5b49SHorst Hummel char *datap; 4130445b5b49SHorst Hummel 4131445b5b49SHorst Hummel len = 0; 4132445b5b49SHorst Hummel while (from <= to) { 4133773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4134445b5b49SHorst Hummel " CCW %p: %08X %08X DAT:", 4135445b5b49SHorst Hummel from, ((int *) from)[0], ((int *) from)[1]); 4136445b5b49SHorst Hummel 4137445b5b49SHorst Hummel /* get pointer to data (consider IDALs) */ 4138445b5b49SHorst Hummel if (from->flags & CCW_FLAG_IDA) 4139445b5b49SHorst Hummel datap = (char *) *((addr_t *) (addr_t) from->cda); 4140445b5b49SHorst Hummel else 4141445b5b49SHorst Hummel datap = (char *) ((addr_t) from->cda); 4142445b5b49SHorst Hummel 4143445b5b49SHorst Hummel /* dump data (max 32 bytes) */ 4144445b5b49SHorst Hummel for (count = 0; count < from->count && count < 32; count++) { 4145445b5b49SHorst Hummel if (count % 8 == 0) len += sprintf(page + len, " "); 4146445b5b49SHorst Hummel if (count % 4 == 0) len += sprintf(page + len, " "); 4147445b5b49SHorst Hummel len += sprintf(page + len, "%02x", datap[count]); 4148445b5b49SHorst Hummel } 4149445b5b49SHorst Hummel len += sprintf(page + len, "\n"); 4150445b5b49SHorst Hummel from++; 4151445b5b49SHorst Hummel } 4152445b5b49SHorst Hummel return len; 4153445b5b49SHorst Hummel } 4154445b5b49SHorst Hummel 4155fc19f381SStefan Haberland static void 4156aeec92caSStefan Haberland dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 4157aeec92caSStefan Haberland char *reason) 4158fc19f381SStefan Haberland { 4159fc19f381SStefan Haberland u64 *sense; 4160a5a0061fSStefan Weinhuber u64 *stat; 4161fc19f381SStefan Haberland 4162aeec92caSStefan Haberland sense = (u64 *) dasd_get_sense(irb); 4163a5a0061fSStefan Weinhuber stat = (u64 *) &irb->scsw; 4164fc19f381SStefan Haberland if (sense) { 4165a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " 4166a5a0061fSStefan Weinhuber "%016llx %016llx %016llx %016llx", 4167a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 4168ed3640b2SStefan Haberland sense[0], sense[1], sense[2], sense[3]); 4169fc19f381SStefan Haberland } else { 4170a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", 4171a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 4172a5a0061fSStefan Weinhuber "NO VALID SENSE"); 4173fc19f381SStefan Haberland } 4174fc19f381SStefan Haberland } 4175fc19f381SStefan Haberland 4176445b5b49SHorst Hummel /* 41771da177e4SLinus Torvalds * Print sense data and related channel program. 41781da177e4SLinus Torvalds * Parts are printed because printk buffer is only 1024 bytes. 41791da177e4SLinus Torvalds */ 4180f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 41818e09f215SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 41821da177e4SLinus Torvalds { 41831da177e4SLinus Torvalds char *page; 4184445b5b49SHorst Hummel struct ccw1 *first, *last, *fail, *from, *to; 4185445b5b49SHorst Hummel int len, sl, sct; 41861da177e4SLinus Torvalds 41871da177e4SLinus Torvalds page = (char *) get_zeroed_page(GFP_ATOMIC); 41881da177e4SLinus Torvalds if (page == NULL) { 4189fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 4190fc19f381SStefan Haberland "No memory to dump sense data\n"); 41911da177e4SLinus Torvalds return; 41921da177e4SLinus Torvalds } 4193445b5b49SHorst Hummel /* dump the sense data */ 4194773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 41951da177e4SLinus Torvalds " I/O status report for device %s:\n", 41962a0217d5SKay Sievers dev_name(&device->cdev->dev)); 4197773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4198a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 4199a5a0061fSStefan Weinhuber "CS:%02X RC:%d\n", 4200a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 4201a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 4202a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 4203a5a0061fSStefan Weinhuber req ? req->intrc : 0); 4204773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 42051da177e4SLinus Torvalds " device %s: Failing CCW: %p\n", 42062a0217d5SKay Sievers dev_name(&device->cdev->dev), 420723d805b6SPeter Oberparleiter (void *) (addr_t) irb->scsw.cmd.cpa); 42081da177e4SLinus Torvalds if (irb->esw.esw0.erw.cons) { 42091da177e4SLinus Torvalds for (sl = 0; sl < 4; sl++) { 4210773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 42111da177e4SLinus Torvalds " Sense(hex) %2d-%2d:", 42121da177e4SLinus Torvalds (8 * sl), ((8 * sl) + 7)); 42131da177e4SLinus Torvalds 42141da177e4SLinus Torvalds for (sct = 0; sct < 8; sct++) { 42151da177e4SLinus Torvalds len += sprintf(page + len, " %02x", 42161da177e4SLinus Torvalds irb->ecw[8 * sl + sct]); 42171da177e4SLinus Torvalds } 42181da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 42191da177e4SLinus Torvalds } 42201da177e4SLinus Torvalds 42211da177e4SLinus Torvalds if (irb->ecw[27] & DASD_SENSE_BIT_0) { 42221da177e4SLinus Torvalds /* 24 Byte Sense Data */ 4223773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 42241da177e4SLinus Torvalds " 24 Byte: %x MSG %x, " 42251da177e4SLinus Torvalds "%s MSGb to SYSOP\n", 42261da177e4SLinus Torvalds irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 42271da177e4SLinus Torvalds irb->ecw[1] & 0x10 ? "" : "no"); 42281da177e4SLinus Torvalds } else { 42291da177e4SLinus Torvalds /* 32 Byte Sense Data */ 4230773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 42311da177e4SLinus Torvalds " 32 Byte: Format: %x " 42321da177e4SLinus Torvalds "Exception class %x\n", 42331da177e4SLinus Torvalds irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 42341da177e4SLinus Torvalds } 42351da177e4SLinus Torvalds } else { 4236773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 42371da177e4SLinus Torvalds " SORRY - NO VALID SENSE AVAILABLE\n"); 42381da177e4SLinus Torvalds } 4239773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 42401da177e4SLinus Torvalds 42418e09f215SStefan Weinhuber if (req) { 42428e09f215SStefan Weinhuber /* req == NULL for unsolicited interrupts */ 4243445b5b49SHorst Hummel /* dump the Channel Program (max 140 Bytes per line) */ 4244445b5b49SHorst Hummel /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 4245445b5b49SHorst Hummel first = req->cpaddr; 4246445b5b49SHorst Hummel for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 4247445b5b49SHorst Hummel to = min(first + 6, last); 4248773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 42491da177e4SLinus Torvalds " Related CP in req: %p\n", req); 4250445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(first, to, page + len); 4251773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 42521da177e4SLinus Torvalds 4253445b5b49SHorst Hummel /* print failing CCW area (maximum 4) */ 4254445b5b49SHorst Hummel /* scsw->cda is either valid or zero */ 42551da177e4SLinus Torvalds len = 0; 4256445b5b49SHorst Hummel from = ++to; 425723d805b6SPeter Oberparleiter fail = (struct ccw1 *)(addr_t) 425823d805b6SPeter Oberparleiter irb->scsw.cmd.cpa; /* failing CCW */ 4259445b5b49SHorst Hummel if (from < fail - 2) { 4260445b5b49SHorst Hummel from = fail - 2; /* there is a gap - print header */ 4261773bab4aSSebastian Ott len += sprintf(page, PRINTK_HEADER "......\n"); 42621da177e4SLinus Torvalds } 4263445b5b49SHorst Hummel to = min(fail + 1, last); 4264445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, to, page + len); 42651da177e4SLinus Torvalds 4266445b5b49SHorst Hummel /* print last CCWs (maximum 2) */ 4267445b5b49SHorst Hummel from = max(from, ++to); 4268445b5b49SHorst Hummel if (from < last - 1) { 4269445b5b49SHorst Hummel from = last - 1; /* there is a gap - print header */ 4270773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER "......\n"); 42711da177e4SLinus Torvalds } 4272445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, last, page + len); 42731da177e4SLinus Torvalds if (len > 0) 4274773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 42758e09f215SStefan Weinhuber } 42761da177e4SLinus Torvalds free_page((unsigned long) page); 42771da177e4SLinus Torvalds } 42781da177e4SLinus Torvalds 4279f3eb5384SStefan Weinhuber 4280f3eb5384SStefan Weinhuber /* 4281f3eb5384SStefan Weinhuber * Print sense data from a tcw. 4282f3eb5384SStefan Weinhuber */ 4283f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 4284f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 4285f3eb5384SStefan Weinhuber { 4286f3eb5384SStefan Weinhuber char *page; 4287f3eb5384SStefan Weinhuber int len, sl, sct, residual; 4288f3eb5384SStefan Weinhuber struct tsb *tsb; 4289ef19298bSStefan Weinhuber u8 *sense, *rcq; 4290f3eb5384SStefan Weinhuber 4291f3eb5384SStefan Weinhuber page = (char *) get_zeroed_page(GFP_ATOMIC); 4292f3eb5384SStefan Weinhuber if (page == NULL) { 4293fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, " %s", 4294f3eb5384SStefan Weinhuber "No memory to dump sense data"); 4295f3eb5384SStefan Weinhuber return; 4296f3eb5384SStefan Weinhuber } 4297f3eb5384SStefan Weinhuber /* dump the sense data */ 4298773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 4299f3eb5384SStefan Weinhuber " I/O status report for device %s:\n", 4300f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev)); 4301773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4302a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 4303a5a0061fSStefan Weinhuber "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", 4304a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 4305a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 4306a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 4307a5a0061fSStefan Weinhuber irb->scsw.tm.fcxs, irb->scsw.tm.schxs, 4308a5a0061fSStefan Weinhuber req ? req->intrc : 0); 4309773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4310f3eb5384SStefan Weinhuber " device %s: Failing TCW: %p\n", 4311f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev), 4312f3eb5384SStefan Weinhuber (void *) (addr_t) irb->scsw.tm.tcw); 4313f3eb5384SStefan Weinhuber 4314f3eb5384SStefan Weinhuber tsb = NULL; 4315f3eb5384SStefan Weinhuber sense = NULL; 4316a5a0061fSStefan Weinhuber if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) 4317f3eb5384SStefan Weinhuber tsb = tcw_get_tsb( 4318f3eb5384SStefan Weinhuber (struct tcw *)(unsigned long)irb->scsw.tm.tcw); 4319f3eb5384SStefan Weinhuber 4320b8fde722SStefan Haberland if (tsb) { 4321773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4322f3eb5384SStefan Weinhuber " tsb->length %d\n", tsb->length); 4323773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4324f3eb5384SStefan Weinhuber " tsb->flags %x\n", tsb->flags); 4325773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4326f3eb5384SStefan Weinhuber " tsb->dcw_offset %d\n", tsb->dcw_offset); 4327773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4328f3eb5384SStefan Weinhuber " tsb->count %d\n", tsb->count); 4329f3eb5384SStefan Weinhuber residual = tsb->count - 28; 4330773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4331f3eb5384SStefan Weinhuber " residual %d\n", residual); 4332f3eb5384SStefan Weinhuber 4333f3eb5384SStefan Weinhuber switch (tsb->flags & 0x07) { 4334f3eb5384SStefan Weinhuber case 1: /* tsa_iostat */ 4335773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4336f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_time %d\n", 4337f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_time); 4338773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4339f3eb5384SStefan Weinhuber " tsb->tsa.iostat.def_time %d\n", 4340f3eb5384SStefan Weinhuber tsb->tsa.iostat.def_time); 4341773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4342f3eb5384SStefan Weinhuber " tsb->tsa.iostat.queue_time %d\n", 4343f3eb5384SStefan Weinhuber tsb->tsa.iostat.queue_time); 4344773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4345f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_busy_time %d\n", 4346f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_busy_time); 4347773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4348f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_act_time %d\n", 4349f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_act_time); 4350f3eb5384SStefan Weinhuber sense = tsb->tsa.iostat.sense; 4351f3eb5384SStefan Weinhuber break; 4352f3eb5384SStefan Weinhuber case 2: /* ts_ddpc */ 4353773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4354f3eb5384SStefan Weinhuber " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); 4355ef19298bSStefan Weinhuber for (sl = 0; sl < 2; sl++) { 4356773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4357ef19298bSStefan Weinhuber " tsb->tsa.ddpc.rcq %2d-%2d: ", 4358ef19298bSStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 4359ef19298bSStefan Weinhuber rcq = tsb->tsa.ddpc.rcq; 4360f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 4361f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 4362ef19298bSStefan Weinhuber rcq[8 * sl + sct]); 4363f3eb5384SStefan Weinhuber } 4364f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 4365f3eb5384SStefan Weinhuber } 4366f3eb5384SStefan Weinhuber sense = tsb->tsa.ddpc.sense; 4367f3eb5384SStefan Weinhuber break; 4368f3eb5384SStefan Weinhuber case 3: /* tsa_intrg */ 4369773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4370f3eb5384SStefan Weinhuber " tsb->tsa.intrg.: not supportet yet\n"); 4371f3eb5384SStefan Weinhuber break; 4372f3eb5384SStefan Weinhuber } 4373f3eb5384SStefan Weinhuber 4374f3eb5384SStefan Weinhuber if (sense) { 4375f3eb5384SStefan Weinhuber for (sl = 0; sl < 4; sl++) { 4376773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4377f3eb5384SStefan Weinhuber " Sense(hex) %2d-%2d:", 4378f3eb5384SStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 4379f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 4380f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 4381f3eb5384SStefan Weinhuber sense[8 * sl + sct]); 4382f3eb5384SStefan Weinhuber } 4383f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 4384f3eb5384SStefan Weinhuber } 4385f3eb5384SStefan Weinhuber 4386f3eb5384SStefan Weinhuber if (sense[27] & DASD_SENSE_BIT_0) { 4387f3eb5384SStefan Weinhuber /* 24 Byte Sense Data */ 4388773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4389f3eb5384SStefan Weinhuber " 24 Byte: %x MSG %x, " 4390f3eb5384SStefan Weinhuber "%s MSGb to SYSOP\n", 4391f3eb5384SStefan Weinhuber sense[7] >> 4, sense[7] & 0x0f, 4392f3eb5384SStefan Weinhuber sense[1] & 0x10 ? "" : "no"); 4393f3eb5384SStefan Weinhuber } else { 4394f3eb5384SStefan Weinhuber /* 32 Byte Sense Data */ 4395773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4396f3eb5384SStefan Weinhuber " 32 Byte: Format: %x " 4397f3eb5384SStefan Weinhuber "Exception class %x\n", 4398f3eb5384SStefan Weinhuber sense[6] & 0x0f, sense[22] >> 4); 4399f3eb5384SStefan Weinhuber } 4400f3eb5384SStefan Weinhuber } else { 4401773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4402f3eb5384SStefan Weinhuber " SORRY - NO VALID SENSE AVAILABLE\n"); 4403f3eb5384SStefan Weinhuber } 4404f3eb5384SStefan Weinhuber } else { 4405773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4406f3eb5384SStefan Weinhuber " SORRY - NO TSB DATA AVAILABLE\n"); 4407f3eb5384SStefan Weinhuber } 4408773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 4409f3eb5384SStefan Weinhuber free_page((unsigned long) page); 4410f3eb5384SStefan Weinhuber } 4411f3eb5384SStefan Weinhuber 4412f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense(struct dasd_device *device, 4413f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 4414f3eb5384SStefan Weinhuber { 4415a5a0061fSStefan Weinhuber if (scsw_is_tm(&irb->scsw)) 4416f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_tcw(device, req, irb); 4417f3eb5384SStefan Weinhuber else 4418f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_ccw(device, req, irb); 4419f3eb5384SStefan Weinhuber } 4420f3eb5384SStefan Weinhuber 4421501183f2SStefan Haberland static int dasd_eckd_pm_freeze(struct dasd_device *device) 4422d41dd122SStefan Haberland { 4423d41dd122SStefan Haberland /* 4424d41dd122SStefan Haberland * the device should be disconnected from our LCU structure 4425d41dd122SStefan Haberland * on restore we will reconnect it and reread LCU specific 4426d41dd122SStefan Haberland * information like PAV support that might have changed 4427d41dd122SStefan Haberland */ 4428d41dd122SStefan Haberland dasd_alias_remove_device(device); 4429d41dd122SStefan Haberland dasd_alias_disconnect_device_from_lcu(device); 4430d41dd122SStefan Haberland 4431d41dd122SStefan Haberland return 0; 4432d41dd122SStefan Haberland } 4433d41dd122SStefan Haberland 4434501183f2SStefan Haberland static int dasd_eckd_restore_device(struct dasd_device *device) 4435d41dd122SStefan Haberland { 4436543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 44376fca97a9SStefan Haberland struct dasd_eckd_characteristics temp_rdc_data; 4438f9f8d02fSStefan Haberland int rc; 4439d41dd122SStefan Haberland struct dasd_uid temp_uid; 4440a7602f6cSStefan Haberland unsigned long flags; 4441ea4da6eaSStefan Haberland unsigned long cqr_flags = 0; 4442d41dd122SStefan Haberland 4443d41dd122SStefan Haberland /* Read Configuration Data */ 4444251afd69SStefan Haberland rc = dasd_eckd_read_conf(device); 4445251afd69SStefan Haberland if (rc) { 4446251afd69SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 4447251afd69SStefan Haberland "Read configuration data failed, rc=%d", rc); 4448251afd69SStefan Haberland goto out_err; 4449251afd69SStefan Haberland } 4450d41dd122SStefan Haberland 44512dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 44522dedf0d9SStefan Haberland /* Generate device unique id */ 44532dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 44542dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4455d41dd122SStefan Haberland if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) 4456a7602f6cSStefan Haberland dev_err(&device->cdev->dev, "The UID of the DASD has " 4457a7602f6cSStefan Haberland "changed\n"); 44582dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4459d41dd122SStefan Haberland if (rc) 4460d41dd122SStefan Haberland goto out_err; 4461d41dd122SStefan Haberland 4462d41dd122SStefan Haberland /* register lcu with alias handling, enable PAV if this is a new lcu */ 4463f9f8d02fSStefan Haberland rc = dasd_alias_make_device_known_to_lcu(device); 4464f9f8d02fSStefan Haberland if (rc) 4465251afd69SStefan Haberland goto out_err; 4466ea4da6eaSStefan Haberland 4467ea4da6eaSStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr_flags); 4468ea4da6eaSStefan Haberland dasd_eckd_validate_server(device, cqr_flags); 4469f4ac1d02SStefan Weinhuber 4470f4ac1d02SStefan Weinhuber /* RE-Read Configuration Data */ 4471251afd69SStefan Haberland rc = dasd_eckd_read_conf(device); 4472251afd69SStefan Haberland if (rc) { 4473251afd69SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 4474251afd69SStefan Haberland "Read configuration data failed, rc=%d", rc); 4475251afd69SStefan Haberland goto out_err2; 4476251afd69SStefan Haberland } 4477d41dd122SStefan Haberland 4478d41dd122SStefan Haberland /* Read Feature Codes */ 447968d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 4480d41dd122SStefan Haberland 4481d41dd122SStefan Haberland /* Read Device Characteristics */ 448268b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 44836fca97a9SStefan Haberland &temp_rdc_data, 64); 4484d41dd122SStefan Haberland if (rc) { 4485b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 4486b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 4487251afd69SStefan Haberland goto out_err2; 4488d41dd122SStefan Haberland } 4489a7602f6cSStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 44906fca97a9SStefan Haberland memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data)); 4491a7602f6cSStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4492d41dd122SStefan Haberland 4493d41dd122SStefan Haberland /* add device to alias management */ 4494d41dd122SStefan Haberland dasd_alias_add_device(device); 4495d41dd122SStefan Haberland 4496d41dd122SStefan Haberland return 0; 4497d41dd122SStefan Haberland 4498251afd69SStefan Haberland out_err2: 4499251afd69SStefan Haberland dasd_alias_disconnect_device_from_lcu(device); 4500d41dd122SStefan Haberland out_err: 4501e6125fbaSStefan Haberland return -1; 4502d41dd122SStefan Haberland } 4503d41dd122SStefan Haberland 4504501183f2SStefan Haberland static int dasd_eckd_reload_device(struct dasd_device *device) 4505501183f2SStefan Haberland { 4506543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 4507501183f2SStefan Haberland int rc, old_base; 45082dedf0d9SStefan Haberland char print_uid[60]; 45092dedf0d9SStefan Haberland struct dasd_uid uid; 45102dedf0d9SStefan Haberland unsigned long flags; 4511501183f2SStefan Haberland 451259a9ed5fSStefan Haberland /* 451359a9ed5fSStefan Haberland * remove device from alias handling to prevent new requests 451459a9ed5fSStefan Haberland * from being scheduled on the wrong alias device 451559a9ed5fSStefan Haberland */ 451659a9ed5fSStefan Haberland dasd_alias_remove_device(device); 451759a9ed5fSStefan Haberland 45182dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4519501183f2SStefan Haberland old_base = private->uid.base_unit_addr; 45202dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 45212dedf0d9SStefan Haberland 4522501183f2SStefan Haberland /* Read Configuration Data */ 4523501183f2SStefan Haberland rc = dasd_eckd_read_conf(device); 4524501183f2SStefan Haberland if (rc) 4525501183f2SStefan Haberland goto out_err; 4526501183f2SStefan Haberland 45272dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 4528501183f2SStefan Haberland if (rc) 4529501183f2SStefan Haberland goto out_err; 4530501183f2SStefan Haberland /* 4531501183f2SStefan Haberland * update unit address configuration and 4532501183f2SStefan Haberland * add device to alias management 4533501183f2SStefan Haberland */ 4534501183f2SStefan Haberland dasd_alias_update_add_device(device); 4535501183f2SStefan Haberland 45362dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &uid); 45372dedf0d9SStefan Haberland 45382dedf0d9SStefan Haberland if (old_base != uid.base_unit_addr) { 45392dedf0d9SStefan Haberland if (strlen(uid.vduit) > 0) 45402dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 45412dedf0d9SStefan Haberland "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial, 45422dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr, uid.vduit); 4543501183f2SStefan Haberland else 45442dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 45452dedf0d9SStefan Haberland "%s.%s.%04x.%02x", uid.vendor, uid.serial, 45462dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr); 4547501183f2SStefan Haberland 4548501183f2SStefan Haberland dev_info(&device->cdev->dev, 4549501183f2SStefan Haberland "An Alias device was reassigned to a new base device " 45502dedf0d9SStefan Haberland "with UID: %s\n", print_uid); 4551501183f2SStefan Haberland } 4552501183f2SStefan Haberland return 0; 4553501183f2SStefan Haberland 4554501183f2SStefan Haberland out_err: 4555501183f2SStefan Haberland return -1; 4556501183f2SStefan Haberland } 4557501183f2SStefan Haberland 45585db8440cSStefan Haberland static int dasd_eckd_read_message_buffer(struct dasd_device *device, 45595db8440cSStefan Haberland struct dasd_rssd_messages *messages, 45605db8440cSStefan Haberland __u8 lpum) 45615db8440cSStefan Haberland { 45625db8440cSStefan Haberland struct dasd_rssd_messages *message_buf; 45635db8440cSStefan Haberland struct dasd_psf_prssd_data *prssdp; 45645db8440cSStefan Haberland struct dasd_ccw_req *cqr; 45655db8440cSStefan Haberland struct ccw1 *ccw; 45665db8440cSStefan Haberland int rc; 45675db8440cSStefan Haberland 45685db8440cSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 45695db8440cSStefan Haberland (sizeof(struct dasd_psf_prssd_data) + 45705db8440cSStefan Haberland sizeof(struct dasd_rssd_messages)), 45715db8440cSStefan Haberland device); 45725db8440cSStefan Haberland if (IS_ERR(cqr)) { 45735db8440cSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 45745db8440cSStefan Haberland "Could not allocate read message buffer request"); 45755db8440cSStefan Haberland return PTR_ERR(cqr); 45765db8440cSStefan Haberland } 45775db8440cSStefan Haberland 45785db8440cSStefan Haberland cqr->startdev = device; 45795db8440cSStefan Haberland cqr->memdev = device; 45805db8440cSStefan Haberland cqr->block = NULL; 45815db8440cSStefan Haberland cqr->expires = 10 * HZ; 45825db8440cSStefan Haberland set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 4583b179b037SStefan Haberland /* dasd_sleep_on_immediatly does not do complex error 4584b179b037SStefan Haberland * recovery so clear erp flag and set retry counter to 4585b179b037SStefan Haberland * do basic erp */ 4586b179b037SStefan Haberland clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 4587b179b037SStefan Haberland cqr->retries = 256; 45885db8440cSStefan Haberland 45895db8440cSStefan Haberland /* Prepare for Read Subsystem Data */ 45905db8440cSStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 45915db8440cSStefan Haberland memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 45925db8440cSStefan Haberland prssdp->order = PSF_ORDER_PRSSD; 45935db8440cSStefan Haberland prssdp->suborder = 0x03; /* Message Buffer */ 45945db8440cSStefan Haberland /* all other bytes of prssdp must be zero */ 45955db8440cSStefan Haberland 45965db8440cSStefan Haberland ccw = cqr->cpaddr; 45975db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 45985db8440cSStefan Haberland ccw->count = sizeof(struct dasd_psf_prssd_data); 45995db8440cSStefan Haberland ccw->flags |= CCW_FLAG_CC; 46005db8440cSStefan Haberland ccw->flags |= CCW_FLAG_SLI; 46015db8440cSStefan Haberland ccw->cda = (__u32)(addr_t) prssdp; 46025db8440cSStefan Haberland 46035db8440cSStefan Haberland /* Read Subsystem Data - message buffer */ 46045db8440cSStefan Haberland message_buf = (struct dasd_rssd_messages *) (prssdp + 1); 46055db8440cSStefan Haberland memset(message_buf, 0, sizeof(struct dasd_rssd_messages)); 46065db8440cSStefan Haberland 46075db8440cSStefan Haberland ccw++; 46085db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_RSSD; 46095db8440cSStefan Haberland ccw->count = sizeof(struct dasd_rssd_messages); 46105db8440cSStefan Haberland ccw->flags |= CCW_FLAG_SLI; 46115db8440cSStefan Haberland ccw->cda = (__u32)(addr_t) message_buf; 46125db8440cSStefan Haberland 46135db8440cSStefan Haberland cqr->buildclk = get_tod_clock(); 46145db8440cSStefan Haberland cqr->status = DASD_CQR_FILLED; 46155db8440cSStefan Haberland rc = dasd_sleep_on_immediatly(cqr); 46165db8440cSStefan Haberland if (rc == 0) { 46175db8440cSStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 46185db8440cSStefan Haberland message_buf = (struct dasd_rssd_messages *) 46195db8440cSStefan Haberland (prssdp + 1); 46205db8440cSStefan Haberland memcpy(messages, message_buf, 46215db8440cSStefan Haberland sizeof(struct dasd_rssd_messages)); 46225db8440cSStefan Haberland } else 46235db8440cSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 46245db8440cSStefan Haberland "Reading messages failed with rc=%d\n" 46255db8440cSStefan Haberland , rc); 46265db8440cSStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 46275db8440cSStefan Haberland return rc; 46285db8440cSStefan Haberland } 46295db8440cSStefan Haberland 46305db8440cSStefan Haberland /* 46315db8440cSStefan Haberland * Perform Subsystem Function - CUIR response 46325db8440cSStefan Haberland */ 46335db8440cSStefan Haberland static int 46345db8440cSStefan Haberland dasd_eckd_psf_cuir_response(struct dasd_device *device, int response, 46355db8440cSStefan Haberland __u32 message_id, 46365db8440cSStefan Haberland struct channel_path_desc *desc, 46375db8440cSStefan Haberland struct subchannel_id sch_id) 46385db8440cSStefan Haberland { 46395db8440cSStefan Haberland struct dasd_psf_cuir_response *psf_cuir; 46405db8440cSStefan Haberland struct dasd_ccw_req *cqr; 46415db8440cSStefan Haberland struct ccw1 *ccw; 46425db8440cSStefan Haberland int rc; 46435db8440cSStefan Haberland 46445db8440cSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 46455db8440cSStefan Haberland sizeof(struct dasd_psf_cuir_response), 46465db8440cSStefan Haberland device); 46475db8440cSStefan Haberland 46485db8440cSStefan Haberland if (IS_ERR(cqr)) { 46495db8440cSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 46505db8440cSStefan Haberland "Could not allocate PSF-CUIR request"); 46515db8440cSStefan Haberland return PTR_ERR(cqr); 46525db8440cSStefan Haberland } 46535db8440cSStefan Haberland 46545db8440cSStefan Haberland psf_cuir = (struct dasd_psf_cuir_response *)cqr->data; 46555db8440cSStefan Haberland psf_cuir->order = PSF_ORDER_CUIR_RESPONSE; 46565db8440cSStefan Haberland psf_cuir->cc = response; 46575db8440cSStefan Haberland if (desc) 46585db8440cSStefan Haberland psf_cuir->chpid = desc->chpid; 46595db8440cSStefan Haberland psf_cuir->message_id = message_id; 46605db8440cSStefan Haberland psf_cuir->cssid = sch_id.cssid; 46615db8440cSStefan Haberland psf_cuir->ssid = sch_id.ssid; 46625db8440cSStefan Haberland ccw = cqr->cpaddr; 46635db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 46645db8440cSStefan Haberland ccw->cda = (__u32)(addr_t)psf_cuir; 4665b179b037SStefan Haberland ccw->flags = CCW_FLAG_SLI; 46665db8440cSStefan Haberland ccw->count = sizeof(struct dasd_psf_cuir_response); 46675db8440cSStefan Haberland 46685db8440cSStefan Haberland cqr->startdev = device; 46695db8440cSStefan Haberland cqr->memdev = device; 46705db8440cSStefan Haberland cqr->block = NULL; 46715db8440cSStefan Haberland cqr->retries = 256; 46725db8440cSStefan Haberland cqr->expires = 10*HZ; 46735db8440cSStefan Haberland cqr->buildclk = get_tod_clock(); 46745db8440cSStefan Haberland cqr->status = DASD_CQR_FILLED; 4675b179b037SStefan Haberland set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 46765db8440cSStefan Haberland 46775db8440cSStefan Haberland rc = dasd_sleep_on(cqr); 46785db8440cSStefan Haberland 46795db8440cSStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 46805db8440cSStefan Haberland return rc; 46815db8440cSStefan Haberland } 46825db8440cSStefan Haberland 4683b179b037SStefan Haberland /* 4684b179b037SStefan Haberland * return configuration data that is referenced by record selector 4685b179b037SStefan Haberland * if a record selector is specified or per default return the 4686b179b037SStefan Haberland * conf_data pointer for the path specified by lpum 4687b179b037SStefan Haberland */ 4688b179b037SStefan Haberland static struct dasd_conf_data *dasd_eckd_get_ref_conf(struct dasd_device *device, 4689b179b037SStefan Haberland __u8 lpum, 4690b179b037SStefan Haberland struct dasd_cuir_message *cuir) 46915db8440cSStefan Haberland { 4692543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 4693b179b037SStefan Haberland struct dasd_conf_data *conf_data; 4694b179b037SStefan Haberland int path, pos; 46955db8440cSStefan Haberland 4696b179b037SStefan Haberland if (cuir->record_selector == 0) 4697b179b037SStefan Haberland goto out; 4698b179b037SStefan Haberland for (path = 0x80, pos = 0; path; path >>= 1, pos++) { 4699b179b037SStefan Haberland conf_data = private->path_conf_data[pos]; 4700b179b037SStefan Haberland if (conf_data->gneq.record_selector == 4701b179b037SStefan Haberland cuir->record_selector) 4702b179b037SStefan Haberland return conf_data; 47035db8440cSStefan Haberland } 4704b179b037SStefan Haberland out: 47059d49f86dSSebastian Ott return private->path_conf_data[pathmask_to_pos(lpum)]; 47065db8440cSStefan Haberland } 47075db8440cSStefan Haberland 47085db8440cSStefan Haberland /* 4709b179b037SStefan Haberland * This function determines the scope of a reconfiguration request by 4710b179b037SStefan Haberland * analysing the path and device selection data provided in the CUIR request. 4711b179b037SStefan Haberland * Returns a path mask containing CUIR affected paths for the give device. 4712b179b037SStefan Haberland * 4713b179b037SStefan Haberland * If the CUIR request does not contain the required information return the 4714b179b037SStefan Haberland * path mask of the path the attention message for the CUIR request was reveived 4715b179b037SStefan Haberland * on. 4716b179b037SStefan Haberland */ 4717b179b037SStefan Haberland static int dasd_eckd_cuir_scope(struct dasd_device *device, __u8 lpum, 4718b179b037SStefan Haberland struct dasd_cuir_message *cuir) 4719b179b037SStefan Haberland { 4720543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 4721b179b037SStefan Haberland struct dasd_conf_data *ref_conf_data; 4722b179b037SStefan Haberland unsigned long bitmask = 0, mask = 0; 4723b179b037SStefan Haberland struct dasd_conf_data *conf_data; 4724b179b037SStefan Haberland unsigned int pos, path; 4725b179b037SStefan Haberland char *ref_gneq, *gneq; 4726b179b037SStefan Haberland char *ref_ned, *ned; 4727b179b037SStefan Haberland int tbcpm = 0; 4728b179b037SStefan Haberland 4729b179b037SStefan Haberland /* if CUIR request does not specify the scope use the path 4730b179b037SStefan Haberland the attention message was presented on */ 4731b179b037SStefan Haberland if (!cuir->ned_map || 4732b179b037SStefan Haberland !(cuir->neq_map[0] | cuir->neq_map[1] | cuir->neq_map[2])) 4733b179b037SStefan Haberland return lpum; 4734b179b037SStefan Haberland 4735b179b037SStefan Haberland /* get reference conf data */ 4736b179b037SStefan Haberland ref_conf_data = dasd_eckd_get_ref_conf(device, lpum, cuir); 4737b179b037SStefan Haberland /* reference ned is determined by ned_map field */ 4738b179b037SStefan Haberland pos = 8 - ffs(cuir->ned_map); 4739b179b037SStefan Haberland ref_ned = (char *)&ref_conf_data->neds[pos]; 4740b179b037SStefan Haberland ref_gneq = (char *)&ref_conf_data->gneq; 4741b179b037SStefan Haberland /* transfer 24 bit neq_map to mask */ 4742b179b037SStefan Haberland mask = cuir->neq_map[2]; 4743b179b037SStefan Haberland mask |= cuir->neq_map[1] << 8; 4744b179b037SStefan Haberland mask |= cuir->neq_map[0] << 16; 4745b179b037SStefan Haberland 4746b179b037SStefan Haberland for (path = 0x80; path; path >>= 1) { 4747b179b037SStefan Haberland /* initialise data per path */ 4748b179b037SStefan Haberland bitmask = mask; 47499d49f86dSSebastian Ott pos = pathmask_to_pos(path); 4750b179b037SStefan Haberland conf_data = private->path_conf_data[pos]; 4751b179b037SStefan Haberland pos = 8 - ffs(cuir->ned_map); 4752b179b037SStefan Haberland ned = (char *) &conf_data->neds[pos]; 4753b179b037SStefan Haberland /* compare reference ned and per path ned */ 4754b179b037SStefan Haberland if (memcmp(ref_ned, ned, sizeof(*ned)) != 0) 4755b179b037SStefan Haberland continue; 4756b179b037SStefan Haberland gneq = (char *)&conf_data->gneq; 4757b179b037SStefan Haberland /* compare reference gneq and per_path gneq under 4758b179b037SStefan Haberland 24 bit mask where mask bit 0 equals byte 7 of 4759b179b037SStefan Haberland the gneq and mask bit 24 equals byte 31 */ 4760b179b037SStefan Haberland while (bitmask) { 4761b179b037SStefan Haberland pos = ffs(bitmask) - 1; 4762b179b037SStefan Haberland if (memcmp(&ref_gneq[31 - pos], &gneq[31 - pos], 1) 4763b179b037SStefan Haberland != 0) 4764b179b037SStefan Haberland break; 4765b179b037SStefan Haberland clear_bit(pos, &bitmask); 4766b179b037SStefan Haberland } 4767b179b037SStefan Haberland if (bitmask) 4768b179b037SStefan Haberland continue; 4769b179b037SStefan Haberland /* device and path match the reference values 4770b179b037SStefan Haberland add path to CUIR scope */ 4771b179b037SStefan Haberland tbcpm |= path; 4772b179b037SStefan Haberland } 4773b179b037SStefan Haberland return tbcpm; 4774b179b037SStefan Haberland } 4775b179b037SStefan Haberland 4776b179b037SStefan Haberland static void dasd_eckd_cuir_notify_user(struct dasd_device *device, 4777b179b037SStefan Haberland unsigned long paths, 4778b179b037SStefan Haberland struct subchannel_id sch_id, int action) 4779b179b037SStefan Haberland { 4780b179b037SStefan Haberland struct channel_path_desc *desc; 4781b179b037SStefan Haberland int pos; 4782b179b037SStefan Haberland 4783b179b037SStefan Haberland while (paths) { 4784b179b037SStefan Haberland /* get position of bit in mask */ 4785b179b037SStefan Haberland pos = ffs(paths) - 1; 4786b179b037SStefan Haberland /* get channel path descriptor from this position */ 4787b179b037SStefan Haberland desc = ccw_device_get_chp_desc(device->cdev, 7 - pos); 4788b179b037SStefan Haberland if (action == CUIR_QUIESCE) 4789b179b037SStefan Haberland pr_warn("Service on the storage server caused path " 4790b179b037SStefan Haberland "%x.%02x to go offline", sch_id.cssid, 4791b179b037SStefan Haberland desc ? desc->chpid : 0); 4792b179b037SStefan Haberland else if (action == CUIR_RESUME) 4793b179b037SStefan Haberland pr_info("Path %x.%02x is back online after service " 4794b179b037SStefan Haberland "on the storage server", sch_id.cssid, 4795b179b037SStefan Haberland desc ? desc->chpid : 0); 4796b179b037SStefan Haberland kfree(desc); 4797b179b037SStefan Haberland clear_bit(pos, &paths); 4798b179b037SStefan Haberland } 4799b179b037SStefan Haberland } 4800b179b037SStefan Haberland 4801b179b037SStefan Haberland static int dasd_eckd_cuir_remove_path(struct dasd_device *device, __u8 lpum, 4802b179b037SStefan Haberland struct dasd_cuir_message *cuir) 4803b179b037SStefan Haberland { 4804b179b037SStefan Haberland unsigned long tbcpm; 4805b179b037SStefan Haberland 4806b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(device, lpum, cuir); 4807b179b037SStefan Haberland /* nothing to do if path is not in use */ 4808b179b037SStefan Haberland if (!(device->path_data.opm & tbcpm)) 4809b179b037SStefan Haberland return 0; 4810b179b037SStefan Haberland if (!(device->path_data.opm & ~tbcpm)) { 4811b179b037SStefan Haberland /* no path would be left if the CUIR action is taken 4812b179b037SStefan Haberland return error */ 4813b179b037SStefan Haberland return -EINVAL; 4814b179b037SStefan Haberland } 4815b179b037SStefan Haberland /* remove device from operational path mask */ 4816b179b037SStefan Haberland device->path_data.opm &= ~tbcpm; 4817b179b037SStefan Haberland device->path_data.cuirpm |= tbcpm; 4818b179b037SStefan Haberland return tbcpm; 4819b179b037SStefan Haberland } 4820b179b037SStefan Haberland 4821b179b037SStefan Haberland /* 4822b179b037SStefan Haberland * walk through all devices and build a path mask to quiesce them 4823b179b037SStefan Haberland * return an error if the last path to a device would be removed 48245db8440cSStefan Haberland * 48255db8440cSStefan Haberland * if only part of the devices are quiesced and an error 48265db8440cSStefan Haberland * occurs no onlining necessary, the storage server will 48275db8440cSStefan Haberland * notify the already set offline devices again 48285db8440cSStefan Haberland */ 48295db8440cSStefan Haberland static int dasd_eckd_cuir_quiesce(struct dasd_device *device, __u8 lpum, 4830b179b037SStefan Haberland struct subchannel_id sch_id, 4831b179b037SStefan Haberland struct dasd_cuir_message *cuir) 48325db8440cSStefan Haberland { 4833543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 48345db8440cSStefan Haberland struct alias_pav_group *pavgroup, *tempgroup; 48355db8440cSStefan Haberland struct dasd_device *dev, *n; 4836b179b037SStefan Haberland unsigned long paths = 0; 4837b179b037SStefan Haberland unsigned long flags; 4838b179b037SStefan Haberland int tbcpm; 48395db8440cSStefan Haberland 48405db8440cSStefan Haberland /* active devices */ 4841b179b037SStefan Haberland list_for_each_entry_safe(dev, n, &private->lcu->active_devices, 48425db8440cSStefan Haberland alias_list) { 4843b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 4844b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 4845b179b037SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); 4846b179b037SStefan Haberland if (tbcpm < 0) 4847b179b037SStefan Haberland goto out_err; 4848b179b037SStefan Haberland paths |= tbcpm; 48495db8440cSStefan Haberland } 48505db8440cSStefan Haberland /* inactive devices */ 4851b179b037SStefan Haberland list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices, 48525db8440cSStefan Haberland alias_list) { 4853b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 4854b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 4855b179b037SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); 4856b179b037SStefan Haberland if (tbcpm < 0) 4857b179b037SStefan Haberland goto out_err; 4858b179b037SStefan Haberland paths |= tbcpm; 48595db8440cSStefan Haberland } 48605db8440cSStefan Haberland /* devices in PAV groups */ 48615db8440cSStefan Haberland list_for_each_entry_safe(pavgroup, tempgroup, 48625db8440cSStefan Haberland &private->lcu->grouplist, group) { 48635db8440cSStefan Haberland list_for_each_entry_safe(dev, n, &pavgroup->baselist, 48645db8440cSStefan Haberland alias_list) { 4865b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 4866b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 4867b179b037SStefan Haberland spin_unlock_irqrestore( 4868b179b037SStefan Haberland get_ccwdev_lock(dev->cdev), flags); 4869b179b037SStefan Haberland if (tbcpm < 0) 4870b179b037SStefan Haberland goto out_err; 4871b179b037SStefan Haberland paths |= tbcpm; 48725db8440cSStefan Haberland } 48735db8440cSStefan Haberland list_for_each_entry_safe(dev, n, &pavgroup->aliaslist, 48745db8440cSStefan Haberland alias_list) { 4875b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 4876b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 4877b179b037SStefan Haberland spin_unlock_irqrestore( 4878b179b037SStefan Haberland get_ccwdev_lock(dev->cdev), flags); 4879b179b037SStefan Haberland if (tbcpm < 0) 4880b179b037SStefan Haberland goto out_err; 4881b179b037SStefan Haberland paths |= tbcpm; 48825db8440cSStefan Haberland } 48835db8440cSStefan Haberland } 4884b179b037SStefan Haberland /* notify user about all paths affected by CUIR action */ 4885b179b037SStefan Haberland dasd_eckd_cuir_notify_user(device, paths, sch_id, CUIR_QUIESCE); 4886b179b037SStefan Haberland return 0; 4887b179b037SStefan Haberland out_err: 4888b179b037SStefan Haberland return tbcpm; 48895db8440cSStefan Haberland } 48905db8440cSStefan Haberland 48915db8440cSStefan Haberland static int dasd_eckd_cuir_resume(struct dasd_device *device, __u8 lpum, 4892b179b037SStefan Haberland struct subchannel_id sch_id, 4893b179b037SStefan Haberland struct dasd_cuir_message *cuir) 48945db8440cSStefan Haberland { 4895543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 48965db8440cSStefan Haberland struct alias_pav_group *pavgroup, *tempgroup; 48975db8440cSStefan Haberland struct dasd_device *dev, *n; 4898b179b037SStefan Haberland unsigned long paths = 0; 4899b179b037SStefan Haberland int tbcpm; 49005db8440cSStefan Haberland 49015db8440cSStefan Haberland /* 49025db8440cSStefan Haberland * the path may have been added through a generic path event before 49035db8440cSStefan Haberland * only trigger path verification if the path is not already in use 49045db8440cSStefan Haberland */ 49055db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 49065db8440cSStefan Haberland &private->lcu->active_devices, 49075db8440cSStefan Haberland alias_list) { 4908b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 4909b179b037SStefan Haberland paths |= tbcpm; 4910b179b037SStefan Haberland if (!(dev->path_data.opm & tbcpm)) { 4911b179b037SStefan Haberland dev->path_data.tbvpm |= tbcpm; 49125db8440cSStefan Haberland dasd_schedule_device_bh(dev); 49135db8440cSStefan Haberland } 49145db8440cSStefan Haberland } 49155db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 49165db8440cSStefan Haberland &private->lcu->inactive_devices, 49175db8440cSStefan Haberland alias_list) { 4918b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 4919b179b037SStefan Haberland paths |= tbcpm; 4920b179b037SStefan Haberland if (!(dev->path_data.opm & tbcpm)) { 4921b179b037SStefan Haberland dev->path_data.tbvpm |= tbcpm; 49225db8440cSStefan Haberland dasd_schedule_device_bh(dev); 49235db8440cSStefan Haberland } 49245db8440cSStefan Haberland } 49255db8440cSStefan Haberland /* devices in PAV groups */ 49265db8440cSStefan Haberland list_for_each_entry_safe(pavgroup, tempgroup, 49275db8440cSStefan Haberland &private->lcu->grouplist, 49285db8440cSStefan Haberland group) { 49295db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 49305db8440cSStefan Haberland &pavgroup->baselist, 49315db8440cSStefan Haberland alias_list) { 4932b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 4933b179b037SStefan Haberland paths |= tbcpm; 4934b179b037SStefan Haberland if (!(dev->path_data.opm & tbcpm)) { 4935b179b037SStefan Haberland dev->path_data.tbvpm |= tbcpm; 49365db8440cSStefan Haberland dasd_schedule_device_bh(dev); 49375db8440cSStefan Haberland } 49385db8440cSStefan Haberland } 49395db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 49405db8440cSStefan Haberland &pavgroup->aliaslist, 49415db8440cSStefan Haberland alias_list) { 4942b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 4943b179b037SStefan Haberland paths |= tbcpm; 4944b179b037SStefan Haberland if (!(dev->path_data.opm & tbcpm)) { 4945b179b037SStefan Haberland dev->path_data.tbvpm |= tbcpm; 49465db8440cSStefan Haberland dasd_schedule_device_bh(dev); 49475db8440cSStefan Haberland } 49485db8440cSStefan Haberland } 49495db8440cSStefan Haberland } 4950b179b037SStefan Haberland /* notify user about all paths affected by CUIR action */ 4951b179b037SStefan Haberland dasd_eckd_cuir_notify_user(device, paths, sch_id, CUIR_RESUME); 4952b179b037SStefan Haberland return 0; 49535db8440cSStefan Haberland } 49545db8440cSStefan Haberland 49555db8440cSStefan Haberland static void dasd_eckd_handle_cuir(struct dasd_device *device, void *messages, 49565db8440cSStefan Haberland __u8 lpum) 49575db8440cSStefan Haberland { 49585db8440cSStefan Haberland struct dasd_cuir_message *cuir = messages; 49595db8440cSStefan Haberland struct channel_path_desc *desc; 49605db8440cSStefan Haberland struct subchannel_id sch_id; 49615db8440cSStefan Haberland int pos, response; 49625db8440cSStefan Haberland 4963b179b037SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, 4964b179b037SStefan Haberland "CUIR request: %016llx %016llx %016llx %08x", 4965b179b037SStefan Haberland ((u64 *)cuir)[0], ((u64 *)cuir)[1], ((u64 *)cuir)[2], 4966b179b037SStefan Haberland ((u32 *)cuir)[3]); 4967b179b037SStefan Haberland ccw_device_get_schid(device->cdev, &sch_id); 49689d49f86dSSebastian Ott pos = pathmask_to_pos(lpum); 49695db8440cSStefan Haberland desc = ccw_device_get_chp_desc(device->cdev, pos); 49705db8440cSStefan Haberland 49715db8440cSStefan Haberland if (cuir->code == CUIR_QUIESCE) { 49725db8440cSStefan Haberland /* quiesce */ 4973b179b037SStefan Haberland if (dasd_eckd_cuir_quiesce(device, lpum, sch_id, cuir)) 4974b179b037SStefan Haberland response = PSF_CUIR_LAST_PATH; 4975b179b037SStefan Haberland else 4976b179b037SStefan Haberland response = PSF_CUIR_COMPLETED; 49775db8440cSStefan Haberland } else if (cuir->code == CUIR_RESUME) { 49785db8440cSStefan Haberland /* resume */ 4979b179b037SStefan Haberland dasd_eckd_cuir_resume(device, lpum, sch_id, cuir); 4980b179b037SStefan Haberland response = PSF_CUIR_COMPLETED; 49815db8440cSStefan Haberland } else 49825db8440cSStefan Haberland response = PSF_CUIR_NOT_SUPPORTED; 49835db8440cSStefan Haberland 4984b179b037SStefan Haberland dasd_eckd_psf_cuir_response(device, response, 4985b179b037SStefan Haberland cuir->message_id, desc, sch_id); 4986b179b037SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, 4987b179b037SStefan Haberland "CUIR response: %d on message ID %08x", response, 4988b179b037SStefan Haberland cuir->message_id); 49895db8440cSStefan Haberland /* free descriptor copy */ 49905db8440cSStefan Haberland kfree(desc); 4991b179b037SStefan Haberland /* to make sure there is no attention left schedule work again */ 4992b179b037SStefan Haberland device->discipline->check_attention(device, lpum); 49935db8440cSStefan Haberland } 49945db8440cSStefan Haberland 49955db8440cSStefan Haberland static void dasd_eckd_check_attention_work(struct work_struct *work) 49965db8440cSStefan Haberland { 49975db8440cSStefan Haberland struct check_attention_work_data *data; 49985db8440cSStefan Haberland struct dasd_rssd_messages *messages; 49995db8440cSStefan Haberland struct dasd_device *device; 50005db8440cSStefan Haberland int rc; 50015db8440cSStefan Haberland 50025db8440cSStefan Haberland data = container_of(work, struct check_attention_work_data, worker); 50035db8440cSStefan Haberland device = data->device; 50045db8440cSStefan Haberland messages = kzalloc(sizeof(*messages), GFP_KERNEL); 50055db8440cSStefan Haberland if (!messages) { 50065db8440cSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 50075db8440cSStefan Haberland "Could not allocate attention message buffer"); 50085db8440cSStefan Haberland goto out; 50095db8440cSStefan Haberland } 50105db8440cSStefan Haberland rc = dasd_eckd_read_message_buffer(device, messages, data->lpum); 50115db8440cSStefan Haberland if (rc) 50125db8440cSStefan Haberland goto out; 50135db8440cSStefan Haberland if (messages->length == ATTENTION_LENGTH_CUIR && 50145db8440cSStefan Haberland messages->format == ATTENTION_FORMAT_CUIR) 50155db8440cSStefan Haberland dasd_eckd_handle_cuir(device, messages, data->lpum); 50165db8440cSStefan Haberland out: 50175db8440cSStefan Haberland dasd_put_device(device); 50185db8440cSStefan Haberland kfree(messages); 50195db8440cSStefan Haberland kfree(data); 50205db8440cSStefan Haberland } 50215db8440cSStefan Haberland 50225db8440cSStefan Haberland static int dasd_eckd_check_attention(struct dasd_device *device, __u8 lpum) 50235db8440cSStefan Haberland { 50245db8440cSStefan Haberland struct check_attention_work_data *data; 50255db8440cSStefan Haberland 50265db8440cSStefan Haberland data = kzalloc(sizeof(*data), GFP_ATOMIC); 50275db8440cSStefan Haberland if (!data) 50285db8440cSStefan Haberland return -ENOMEM; 50295db8440cSStefan Haberland INIT_WORK(&data->worker, dasd_eckd_check_attention_work); 50305db8440cSStefan Haberland dasd_get_device(device); 50315db8440cSStefan Haberland data->device = device; 50325db8440cSStefan Haberland data->lpum = lpum; 50335db8440cSStefan Haberland schedule_work(&data->worker); 50345db8440cSStefan Haberland return 0; 50355db8440cSStefan Haberland } 50365db8440cSStefan Haberland 5037d41dd122SStefan Haberland static struct ccw_driver dasd_eckd_driver = { 50383bda058bSSebastian Ott .driver = { 5039d41dd122SStefan Haberland .name = "dasd-eckd", 5040d41dd122SStefan Haberland .owner = THIS_MODULE, 50413bda058bSSebastian Ott }, 5042d41dd122SStefan Haberland .ids = dasd_eckd_ids, 5043d41dd122SStefan Haberland .probe = dasd_eckd_probe, 5044d41dd122SStefan Haberland .remove = dasd_generic_remove, 5045d41dd122SStefan Haberland .set_offline = dasd_generic_set_offline, 5046d41dd122SStefan Haberland .set_online = dasd_eckd_set_online, 5047d41dd122SStefan Haberland .notify = dasd_generic_notify, 5048a4d26c6aSStefan Weinhuber .path_event = dasd_generic_path_event, 50494679e893SStefan Haberland .shutdown = dasd_generic_shutdown, 5050d41dd122SStefan Haberland .freeze = dasd_generic_pm_freeze, 5051d41dd122SStefan Haberland .thaw = dasd_generic_restore_device, 5052d41dd122SStefan Haberland .restore = dasd_generic_restore_device, 5053a23ed009SStefan Haberland .uc_handler = dasd_generic_uc_handler, 5054420f42ecSHeiko Carstens .int_class = IRQIO_DAS, 5055d41dd122SStefan Haberland }; 5056f3eb5384SStefan Weinhuber 50571da177e4SLinus Torvalds /* 50581da177e4SLinus Torvalds * max_blocks is dependent on the amount of storage that is available 50591da177e4SLinus Torvalds * in the static io buffer for each device. Currently each device has 50601da177e4SLinus Torvalds * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has 50611da177e4SLinus Torvalds * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use 50621da177e4SLinus Torvalds * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In 50631da177e4SLinus Torvalds * addition we have one define extent ccw + 16 bytes of data and one 50641da177e4SLinus Torvalds * locate record ccw + 16 bytes of data. That makes: 50651da177e4SLinus Torvalds * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. 50661da177e4SLinus Torvalds * We want to fit two into the available memory so that we can immediately 50671da177e4SLinus Torvalds * start the next request if one finishes off. That makes 249.5 blocks 50681da177e4SLinus Torvalds * for one request. Give a little safety and the result is 240. 50691da177e4SLinus Torvalds */ 50701da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline = { 50711da177e4SLinus Torvalds .owner = THIS_MODULE, 50721da177e4SLinus Torvalds .name = "ECKD", 50731da177e4SLinus Torvalds .ebcname = "ECKD", 5074ef19298bSStefan Weinhuber .max_blocks = 190, 50751da177e4SLinus Torvalds .check_device = dasd_eckd_check_characteristics, 50768e09f215SStefan Weinhuber .uncheck_device = dasd_eckd_uncheck_device, 50771da177e4SLinus Torvalds .do_analysis = dasd_eckd_do_analysis, 5078a4d26c6aSStefan Weinhuber .verify_path = dasd_eckd_verify_path, 5079d42e1712SStefan Haberland .basic_to_ready = dasd_eckd_basic_to_ready, 50808e09f215SStefan Weinhuber .online_to_ready = dasd_eckd_online_to_ready, 5081daa991bfSStefan Haberland .basic_to_known = dasd_eckd_basic_to_known, 50821da177e4SLinus Torvalds .fill_geometry = dasd_eckd_fill_geometry, 50831da177e4SLinus Torvalds .start_IO = dasd_start_IO, 50841da177e4SLinus Torvalds .term_IO = dasd_term_IO, 50858e09f215SStefan Weinhuber .handle_terminated_request = dasd_eckd_handle_terminated_request, 50861da177e4SLinus Torvalds .format_device = dasd_eckd_format_device, 50871da177e4SLinus Torvalds .erp_action = dasd_eckd_erp_action, 50881da177e4SLinus Torvalds .erp_postaction = dasd_eckd_erp_postaction, 50895a27e60dSStefan Weinhuber .check_for_device_change = dasd_eckd_check_for_device_change, 50908e09f215SStefan Weinhuber .build_cp = dasd_eckd_build_alias_cp, 50918e09f215SStefan Weinhuber .free_cp = dasd_eckd_free_alias_cp, 50921da177e4SLinus Torvalds .dump_sense = dasd_eckd_dump_sense, 5093fc19f381SStefan Haberland .dump_sense_dbf = dasd_eckd_dump_sense_dbf, 50941da177e4SLinus Torvalds .fill_info = dasd_eckd_fill_info, 50951107ccfbSChristoph Hellwig .ioctl = dasd_eckd_ioctl, 5096d41dd122SStefan Haberland .freeze = dasd_eckd_pm_freeze, 5097d41dd122SStefan Haberland .restore = dasd_eckd_restore_device, 5098501183f2SStefan Haberland .reload = dasd_eckd_reload_device, 50992dedf0d9SStefan Haberland .get_uid = dasd_eckd_get_uid, 5100f1633031SStefan Haberland .kick_validate = dasd_eckd_kick_validate_server, 51015db8440cSStefan Haberland .check_attention = dasd_eckd_check_attention, 51021da177e4SLinus Torvalds }; 51031da177e4SLinus Torvalds 51041da177e4SLinus Torvalds static int __init 51051da177e4SLinus Torvalds dasd_eckd_init(void) 51061da177e4SLinus Torvalds { 5107736e6ea0SSebastian Ott int ret; 5108736e6ea0SSebastian Ott 51091da177e4SLinus Torvalds ASCEBC(dasd_eckd_discipline.ebcname, 4); 5110f932bceaSStefan Weinhuber dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), 5111f932bceaSStefan Weinhuber GFP_KERNEL | GFP_DMA); 5112f932bceaSStefan Weinhuber if (!dasd_reserve_req) 5113f932bceaSStefan Weinhuber return -ENOMEM; 5114a4d26c6aSStefan Weinhuber path_verification_worker = kmalloc(sizeof(*path_verification_worker), 5115a4d26c6aSStefan Weinhuber GFP_KERNEL | GFP_DMA); 5116a4d26c6aSStefan Weinhuber if (!path_verification_worker) { 5117a4d26c6aSStefan Weinhuber kfree(dasd_reserve_req); 5118a4d26c6aSStefan Weinhuber return -ENOMEM; 5119a4d26c6aSStefan Weinhuber } 5120558b9ef0SStefan Weinhuber rawpadpage = (void *)__get_free_page(GFP_KERNEL); 5121558b9ef0SStefan Weinhuber if (!rawpadpage) { 5122558b9ef0SStefan Weinhuber kfree(path_verification_worker); 5123558b9ef0SStefan Weinhuber kfree(dasd_reserve_req); 5124558b9ef0SStefan Weinhuber return -ENOMEM; 5125558b9ef0SStefan Weinhuber } 5126736e6ea0SSebastian Ott ret = ccw_driver_register(&dasd_eckd_driver); 5127736e6ea0SSebastian Ott if (!ret) 5128736e6ea0SSebastian Ott wait_for_device_probe(); 5129a4d26c6aSStefan Weinhuber else { 5130a4d26c6aSStefan Weinhuber kfree(path_verification_worker); 5131f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 5132558b9ef0SStefan Weinhuber free_page((unsigned long)rawpadpage); 5133a4d26c6aSStefan Weinhuber } 5134736e6ea0SSebastian Ott return ret; 51351da177e4SLinus Torvalds } 51361da177e4SLinus Torvalds 51371da177e4SLinus Torvalds static void __exit 51381da177e4SLinus Torvalds dasd_eckd_cleanup(void) 51391da177e4SLinus Torvalds { 51401da177e4SLinus Torvalds ccw_driver_unregister(&dasd_eckd_driver); 5141a4d26c6aSStefan Weinhuber kfree(path_verification_worker); 5142f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 5143558b9ef0SStefan Weinhuber free_page((unsigned long)rawpadpage); 51441da177e4SLinus Torvalds } 51451da177e4SLinus Torvalds 51461da177e4SLinus Torvalds module_init(dasd_eckd_init); 51471da177e4SLinus Torvalds module_exit(dasd_eckd_cleanup); 5148