11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * File...........: linux/drivers/s390/block/dasd_eckd.c 31da177e4SLinus Torvalds * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> 41da177e4SLinus Torvalds * Horst Hummel <Horst.Hummel@de.ibm.com> 51da177e4SLinus Torvalds * Carsten Otte <Cotte@de.ibm.com> 61da177e4SLinus Torvalds * Martin Schwidefsky <schwidefsky@de.ibm.com> 71da177e4SLinus Torvalds * Bugreports.to..: <Linux390@de.ibm.com> 8d41dd122SStefan Haberland * Copyright IBM Corp. 1999, 2009 9ab1d848fSNigel Hislop * EMC Symmetrix ioctl Copyright EMC Corporation, 2008 10ab1d848fSNigel Hislop * Author.........: Nigel Hislop <hislop_nigel@emc.com> 111da177e4SLinus Torvalds */ 121da177e4SLinus Torvalds 13ca99dab0SStefan Haberland #define KMSG_COMPONENT "dasd-eckd" 14fc19f381SStefan Haberland 151da177e4SLinus Torvalds #include <linux/stddef.h> 161da177e4SLinus Torvalds #include <linux/kernel.h> 171da177e4SLinus Torvalds #include <linux/slab.h> 181da177e4SLinus Torvalds #include <linux/hdreg.h> /* HDIO_GETGEO */ 191da177e4SLinus Torvalds #include <linux/bio.h> 201da177e4SLinus Torvalds #include <linux/module.h> 21048cd4e5SHeiko Carstens #include <linux/compat.h> 221da177e4SLinus Torvalds #include <linux/init.h> 231da177e4SLinus Torvalds 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> 321da177e4SLinus Torvalds 331da177e4SLinus Torvalds #include "dasd_int.h" 341da177e4SLinus Torvalds #include "dasd_eckd.h" 35f3eb5384SStefan Weinhuber #include "../cio/chsc.h" 36f3eb5384SStefan Weinhuber 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 90eb6e199bSStefan Weinhuber #define INIT_CQR_OK 0 91eb6e199bSStefan Weinhuber #define INIT_CQR_UNFORMATTED 1 92eb6e199bSStefan Weinhuber #define INIT_CQR_ERROR 2 93eb6e199bSStefan Weinhuber 94f932bceaSStefan Weinhuber /* emergency request for reserve/release */ 95f932bceaSStefan Weinhuber static struct { 96f932bceaSStefan Weinhuber struct dasd_ccw_req cqr; 97f932bceaSStefan Weinhuber struct ccw1 ccw; 98f932bceaSStefan Weinhuber char data[32]; 99f932bceaSStefan Weinhuber } *dasd_reserve_req; 100f932bceaSStefan Weinhuber static DEFINE_MUTEX(dasd_reserve_mutex); 101f932bceaSStefan Weinhuber 102a4d26c6aSStefan Weinhuber /* definitions for the path verification worker */ 103a4d26c6aSStefan Weinhuber struct path_verification_work_data { 104a4d26c6aSStefan Weinhuber struct work_struct worker; 105a4d26c6aSStefan Weinhuber struct dasd_device *device; 106a4d26c6aSStefan Weinhuber struct dasd_ccw_req cqr; 107a4d26c6aSStefan Weinhuber struct ccw1 ccw; 108a4d26c6aSStefan Weinhuber __u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE]; 109a4d26c6aSStefan Weinhuber int isglobal; 110a4d26c6aSStefan Weinhuber __u8 tbvpm; 111a4d26c6aSStefan Weinhuber }; 112a4d26c6aSStefan Weinhuber static struct path_verification_work_data *path_verification_worker; 113a4d26c6aSStefan Weinhuber static DEFINE_MUTEX(dasd_path_verification_mutex); 114eb6e199bSStefan Weinhuber 1151da177e4SLinus Torvalds /* initial attempt at a probe function. this can be simplified once 1161da177e4SLinus Torvalds * the other detection code is gone */ 1171da177e4SLinus Torvalds static int 1181da177e4SLinus Torvalds dasd_eckd_probe (struct ccw_device *cdev) 1191da177e4SLinus Torvalds { 1201da177e4SLinus Torvalds int ret; 1211da177e4SLinus Torvalds 12240545573SHorst Hummel /* set ECKD specific ccw-device options */ 123454e1fa1SPeter Oberparleiter ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE | 124454e1fa1SPeter Oberparleiter CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH); 12540545573SHorst Hummel if (ret) { 126b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s", 127b8ed5dd5SStefan Haberland "dasd_eckd_probe: could not set " 128b8ed5dd5SStefan Haberland "ccw-device options"); 1291da177e4SLinus Torvalds return ret; 13040545573SHorst Hummel } 13140545573SHorst Hummel ret = dasd_generic_probe(cdev, &dasd_eckd_discipline); 13240545573SHorst Hummel return ret; 1331da177e4SLinus Torvalds } 1341da177e4SLinus Torvalds 1351da177e4SLinus Torvalds static int 1361da177e4SLinus Torvalds dasd_eckd_set_online(struct ccw_device *cdev) 1371da177e4SLinus Torvalds { 1381da177e4SLinus Torvalds return dasd_generic_set_online(cdev, &dasd_eckd_discipline); 1391da177e4SLinus Torvalds } 1401da177e4SLinus Torvalds 1411da177e4SLinus Torvalds static const int sizes_trk0[] = { 28, 148, 84 }; 1421da177e4SLinus Torvalds #define LABEL_SIZE 140 1431da177e4SLinus Torvalds 1441da177e4SLinus Torvalds static inline unsigned int 1451da177e4SLinus Torvalds round_up_multiple(unsigned int no, unsigned int mult) 1461da177e4SLinus Torvalds { 1471da177e4SLinus Torvalds int rem = no % mult; 1481da177e4SLinus Torvalds return (rem ? no - rem + mult : no); 1491da177e4SLinus Torvalds } 1501da177e4SLinus Torvalds 1511da177e4SLinus Torvalds static inline unsigned int 1521da177e4SLinus Torvalds ceil_quot(unsigned int d1, unsigned int d2) 1531da177e4SLinus Torvalds { 1541da177e4SLinus Torvalds return (d1 + (d2 - 1)) / d2; 1551da177e4SLinus Torvalds } 1561da177e4SLinus Torvalds 1574d284cacSHeiko Carstens static unsigned int 1581da177e4SLinus Torvalds recs_per_track(struct dasd_eckd_characteristics * rdc, 1591da177e4SLinus Torvalds unsigned int kl, unsigned int dl) 1601da177e4SLinus Torvalds { 1611da177e4SLinus Torvalds int dn, kn; 1621da177e4SLinus Torvalds 1631da177e4SLinus Torvalds switch (rdc->dev_type) { 1641da177e4SLinus Torvalds case 0x3380: 1651da177e4SLinus Torvalds if (kl) 1661da177e4SLinus Torvalds return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + 1671da177e4SLinus Torvalds ceil_quot(dl + 12, 32)); 1681da177e4SLinus Torvalds else 1691da177e4SLinus Torvalds return 1499 / (15 + ceil_quot(dl + 12, 32)); 1701da177e4SLinus Torvalds case 0x3390: 1711da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1721da177e4SLinus Torvalds if (kl) { 1731da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1741da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + 1751da177e4SLinus Torvalds 9 + ceil_quot(dl + 6 * dn, 34)); 1761da177e4SLinus Torvalds } else 1771da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); 1781da177e4SLinus Torvalds case 0x9345: 1791da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1801da177e4SLinus Torvalds if (kl) { 1811da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1821da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + 1831da177e4SLinus Torvalds ceil_quot(dl + 6 * dn, 34)); 1841da177e4SLinus Torvalds } else 1851da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); 1861da177e4SLinus Torvalds } 1871da177e4SLinus Torvalds return 0; 1881da177e4SLinus Torvalds } 1891da177e4SLinus Torvalds 190b44b0ab3SStefan Weinhuber static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head) 191b44b0ab3SStefan Weinhuber { 192b44b0ab3SStefan Weinhuber geo->cyl = (__u16) cyl; 193b44b0ab3SStefan Weinhuber geo->head = cyl >> 16; 194b44b0ab3SStefan Weinhuber geo->head <<= 4; 195b44b0ab3SStefan Weinhuber geo->head |= head; 196b44b0ab3SStefan Weinhuber } 197b44b0ab3SStefan Weinhuber 1984d284cacSHeiko Carstens static int 1991da177e4SLinus Torvalds check_XRC (struct ccw1 *de_ccw, 2001da177e4SLinus Torvalds struct DE_eckd_data *data, 2011da177e4SLinus Torvalds struct dasd_device *device) 2021da177e4SLinus Torvalds { 2031da177e4SLinus Torvalds struct dasd_eckd_private *private; 204d54853efSMartin Schwidefsky int rc; 2051da177e4SLinus Torvalds 2061da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 207d54853efSMartin Schwidefsky if (!private->rdc_data.facilities.XRC_supported) 208d54853efSMartin Schwidefsky return 0; 2091da177e4SLinus Torvalds 2101da177e4SLinus Torvalds /* switch on System Time Stamp - needed for XRC Support */ 2111da177e4SLinus Torvalds data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ 2121da177e4SLinus Torvalds data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ 2131da177e4SLinus Torvalds 214d54853efSMartin Schwidefsky rc = get_sync_clock(&data->ep_sys_time); 215d54853efSMartin Schwidefsky /* Ignore return code if sync clock is switched off. */ 216d54853efSMartin Schwidefsky if (rc == -ENOSYS || rc == -EACCES) 217d54853efSMartin Schwidefsky rc = 0; 2181da177e4SLinus Torvalds 2191da177e4SLinus Torvalds de_ccw->count = sizeof(struct DE_eckd_data); 2201da177e4SLinus Torvalds de_ccw->flags |= CCW_FLAG_SLI; 221d54853efSMartin Schwidefsky return rc; 2221da177e4SLinus Torvalds } 2231da177e4SLinus Torvalds 2244d284cacSHeiko Carstens static int 225b44b0ab3SStefan Weinhuber define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk, 226b44b0ab3SStefan Weinhuber unsigned int totrk, int cmd, struct dasd_device *device) 2271da177e4SLinus Torvalds { 2281da177e4SLinus Torvalds struct dasd_eckd_private *private; 229b44b0ab3SStefan Weinhuber u32 begcyl, endcyl; 230b44b0ab3SStefan Weinhuber u16 heads, beghead, endhead; 231d54853efSMartin Schwidefsky int rc = 0; 2321da177e4SLinus Torvalds 2331da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 2341da177e4SLinus Torvalds 2351da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; 2361da177e4SLinus Torvalds ccw->flags = 0; 2371da177e4SLinus Torvalds ccw->count = 16; 2381da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 2391da177e4SLinus Torvalds 2401da177e4SLinus Torvalds memset(data, 0, sizeof(struct DE_eckd_data)); 2411da177e4SLinus Torvalds switch (cmd) { 2421da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 2431da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 2441da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 2451da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 2461da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 2471da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 2481da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 2491da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 2501da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_COUNT: 2511da177e4SLinus Torvalds data->mask.perm = 0x1; 2521da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 2531da177e4SLinus Torvalds break; 2541da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 2551da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 2561da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 2571da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 2581da177e4SLinus Torvalds data->mask.perm = 0x02; 2591da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 260d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2611da177e4SLinus Torvalds break; 2621da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 2631da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 2641da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 265d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2661da177e4SLinus Torvalds break; 2671da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 2681da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 2691da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 2701da177e4SLinus Torvalds data->mask.perm = 0x3; 2711da177e4SLinus Torvalds data->mask.auth = 0x1; 2721da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 273d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2741da177e4SLinus Torvalds break; 2751da177e4SLinus Torvalds default: 276fc19f381SStefan Haberland dev_err(&device->cdev->dev, 277fc19f381SStefan Haberland "0x%x is not a known command\n", cmd); 2781da177e4SLinus Torvalds break; 2791da177e4SLinus Torvalds } 2801da177e4SLinus Torvalds 2811da177e4SLinus Torvalds data->attributes.mode = 0x3; /* ECKD */ 2821da177e4SLinus Torvalds 2831da177e4SLinus Torvalds if ((private->rdc_data.cu_type == 0x2105 || 2841da177e4SLinus Torvalds private->rdc_data.cu_type == 0x2107 || 2851da177e4SLinus Torvalds private->rdc_data.cu_type == 0x1750) 2861da177e4SLinus Torvalds && !(private->uses_cdl && trk < 2)) 2871da177e4SLinus Torvalds data->ga_extended |= 0x40; /* Regular Data Format Mode */ 2881da177e4SLinus Torvalds 289b44b0ab3SStefan Weinhuber heads = private->rdc_data.trk_per_cyl; 290b44b0ab3SStefan Weinhuber begcyl = trk / heads; 291b44b0ab3SStefan Weinhuber beghead = trk % heads; 292b44b0ab3SStefan Weinhuber endcyl = totrk / heads; 293b44b0ab3SStefan Weinhuber endhead = totrk % heads; 2941da177e4SLinus Torvalds 2951da177e4SLinus Torvalds /* check for sequential prestage - enhance cylinder range */ 2961da177e4SLinus Torvalds if (data->attributes.operation == DASD_SEQ_PRESTAGE || 2971da177e4SLinus Torvalds data->attributes.operation == DASD_SEQ_ACCESS) { 2981da177e4SLinus Torvalds 299b44b0ab3SStefan Weinhuber if (endcyl + private->attrib.nr_cyl < private->real_cyl) 300b44b0ab3SStefan Weinhuber endcyl += private->attrib.nr_cyl; 3011da177e4SLinus Torvalds else 302b44b0ab3SStefan Weinhuber endcyl = (private->real_cyl - 1); 3031da177e4SLinus Torvalds } 3041da177e4SLinus Torvalds 305b44b0ab3SStefan Weinhuber set_ch_t(&data->beg_ext, begcyl, beghead); 306b44b0ab3SStefan Weinhuber set_ch_t(&data->end_ext, endcyl, endhead); 307d54853efSMartin Schwidefsky return rc; 3081da177e4SLinus Torvalds } 3091da177e4SLinus Torvalds 3108e09f215SStefan Weinhuber static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata, 3118e09f215SStefan Weinhuber struct dasd_device *device) 3128e09f215SStefan Weinhuber { 3138e09f215SStefan Weinhuber struct dasd_eckd_private *private; 3148e09f215SStefan Weinhuber int rc; 3158e09f215SStefan Weinhuber 3168e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 3178e09f215SStefan Weinhuber if (!private->rdc_data.facilities.XRC_supported) 3188e09f215SStefan Weinhuber return 0; 3198e09f215SStefan Weinhuber 3208e09f215SStefan Weinhuber /* switch on System Time Stamp - needed for XRC Support */ 321f3eb5384SStefan Weinhuber pfxdata->define_extent.ga_extended |= 0x08; /* 'Time Stamp Valid' */ 322f3eb5384SStefan Weinhuber pfxdata->define_extent.ga_extended |= 0x02; /* 'Extended Parameter' */ 3238e09f215SStefan Weinhuber pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */ 3248e09f215SStefan Weinhuber 325f3eb5384SStefan Weinhuber rc = get_sync_clock(&pfxdata->define_extent.ep_sys_time); 3268e09f215SStefan Weinhuber /* Ignore return code if sync clock is switched off. */ 3278e09f215SStefan Weinhuber if (rc == -ENOSYS || rc == -EACCES) 3288e09f215SStefan Weinhuber rc = 0; 3298e09f215SStefan Weinhuber return rc; 3308e09f215SStefan Weinhuber } 3318e09f215SStefan Weinhuber 332f3eb5384SStefan Weinhuber static void fill_LRE_data(struct LRE_eckd_data *data, unsigned int trk, 333f3eb5384SStefan Weinhuber unsigned int rec_on_trk, int count, int cmd, 334f3eb5384SStefan Weinhuber struct dasd_device *device, unsigned int reclen, 335f3eb5384SStefan Weinhuber unsigned int tlf) 336f3eb5384SStefan Weinhuber { 337f3eb5384SStefan Weinhuber struct dasd_eckd_private *private; 338f3eb5384SStefan Weinhuber int sector; 339f3eb5384SStefan Weinhuber int dn, d; 340f3eb5384SStefan Weinhuber 341f3eb5384SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 342f3eb5384SStefan Weinhuber 343f3eb5384SStefan Weinhuber memset(data, 0, sizeof(*data)); 344f3eb5384SStefan Weinhuber sector = 0; 345f3eb5384SStefan Weinhuber if (rec_on_trk) { 346f3eb5384SStefan Weinhuber switch (private->rdc_data.dev_type) { 347f3eb5384SStefan Weinhuber case 0x3390: 348f3eb5384SStefan Weinhuber dn = ceil_quot(reclen + 6, 232); 349f3eb5384SStefan Weinhuber d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 350f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 351f3eb5384SStefan Weinhuber break; 352f3eb5384SStefan Weinhuber case 0x3380: 353f3eb5384SStefan Weinhuber d = 7 + ceil_quot(reclen + 12, 32); 354f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 355f3eb5384SStefan Weinhuber break; 356f3eb5384SStefan Weinhuber } 357f3eb5384SStefan Weinhuber } 358f3eb5384SStefan Weinhuber data->sector = sector; 359f3eb5384SStefan Weinhuber /* note: meaning of count depends on the operation 360f3eb5384SStefan Weinhuber * for record based I/O it's the number of records, but for 361f3eb5384SStefan Weinhuber * track based I/O it's the number of tracks 362f3eb5384SStefan Weinhuber */ 363f3eb5384SStefan Weinhuber data->count = count; 364f3eb5384SStefan Weinhuber switch (cmd) { 365f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 366f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 367f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 368f3eb5384SStefan Weinhuber break; 369f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_HOME_ADDRESS: 370f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 371f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 372f3eb5384SStefan Weinhuber break; 373f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 374f3eb5384SStefan Weinhuber data->operation.orientation = 0x1; 375f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 376f3eb5384SStefan Weinhuber data->count++; 377f3eb5384SStefan Weinhuber break; 378f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_RECORD_ZERO: 379f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 380f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 381f3eb5384SStefan Weinhuber data->count++; 382f3eb5384SStefan Weinhuber break; 383f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE: 384f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_MT: 385f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD: 386f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD_MT: 387f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 388f3eb5384SStefan Weinhuber data->length = reclen; 389f3eb5384SStefan Weinhuber data->operation.operation = 0x01; 390f3eb5384SStefan Weinhuber break; 391f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD: 392f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD_MT: 393f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 394f3eb5384SStefan Weinhuber data->length = reclen; 395f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 396f3eb5384SStefan Weinhuber break; 397e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_WRITE_FULL_TRACK: 398e4dbb0f2SStefan Haberland data->operation.orientation = 0x0; 399e4dbb0f2SStefan Haberland data->operation.operation = 0x3F; 400e4dbb0f2SStefan Haberland data->extended_operation = 0x11; 401e4dbb0f2SStefan Haberland data->length = 0; 402e4dbb0f2SStefan Haberland data->extended_parameter_length = 0x02; 403e4dbb0f2SStefan Haberland if (data->count > 8) { 404e4dbb0f2SStefan Haberland data->extended_parameter[0] = 0xFF; 405e4dbb0f2SStefan Haberland data->extended_parameter[1] = 0xFF; 406e4dbb0f2SStefan Haberland data->extended_parameter[1] <<= (16 - count); 407e4dbb0f2SStefan Haberland } else { 408e4dbb0f2SStefan Haberland data->extended_parameter[0] = 0xFF; 409e4dbb0f2SStefan Haberland data->extended_parameter[0] <<= (8 - count); 410e4dbb0f2SStefan Haberland data->extended_parameter[1] = 0x00; 411e4dbb0f2SStefan Haberland } 412e4dbb0f2SStefan Haberland data->sector = 0xFF; 413e4dbb0f2SStefan Haberland break; 414f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 415f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 416f3eb5384SStefan Weinhuber data->length = reclen; /* not tlf, as one might think */ 417f3eb5384SStefan Weinhuber data->operation.operation = 0x3F; 418f3eb5384SStefan Weinhuber data->extended_operation = 0x23; 419f3eb5384SStefan Weinhuber break; 420f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ: 421f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_MT: 422f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_KD: 423f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_KD_MT: 424f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 425f3eb5384SStefan Weinhuber data->length = reclen; 426f3eb5384SStefan Weinhuber data->operation.operation = 0x06; 427f3eb5384SStefan Weinhuber break; 428f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD: 429f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD_MT: 430f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 431f3eb5384SStefan Weinhuber data->length = reclen; 432f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 433f3eb5384SStefan Weinhuber break; 434f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_COUNT: 435f3eb5384SStefan Weinhuber data->operation.operation = 0x06; 436f3eb5384SStefan Weinhuber break; 437e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_READ_TRACK: 438e4dbb0f2SStefan Haberland data->operation.orientation = 0x1; 439e4dbb0f2SStefan Haberland data->operation.operation = 0x0C; 440e4dbb0f2SStefan Haberland data->extended_parameter_length = 0; 441e4dbb0f2SStefan Haberland data->sector = 0xFF; 442e4dbb0f2SStefan Haberland break; 443f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 444f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 445f3eb5384SStefan Weinhuber data->length = tlf; 446f3eb5384SStefan Weinhuber data->operation.operation = 0x0C; 447f3eb5384SStefan Weinhuber break; 448f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_ERASE: 449f3eb5384SStefan Weinhuber data->length = reclen; 450f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 451f3eb5384SStefan Weinhuber data->operation.operation = 0x0b; 452f3eb5384SStefan Weinhuber break; 453f3eb5384SStefan Weinhuber default: 454f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, device, 455f3eb5384SStefan Weinhuber "fill LRE unknown opcode 0x%x", cmd); 456f3eb5384SStefan Weinhuber BUG(); 457f3eb5384SStefan Weinhuber } 458f3eb5384SStefan Weinhuber set_ch_t(&data->seek_addr, 459f3eb5384SStefan Weinhuber trk / private->rdc_data.trk_per_cyl, 460f3eb5384SStefan Weinhuber trk % private->rdc_data.trk_per_cyl); 461f3eb5384SStefan Weinhuber data->search_arg.cyl = data->seek_addr.cyl; 462f3eb5384SStefan Weinhuber data->search_arg.head = data->seek_addr.head; 463f3eb5384SStefan Weinhuber data->search_arg.record = rec_on_trk; 464f3eb5384SStefan Weinhuber } 465f3eb5384SStefan Weinhuber 466f3eb5384SStefan Weinhuber static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 467b44b0ab3SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 468f3eb5384SStefan Weinhuber struct dasd_device *basedev, struct dasd_device *startdev, 469f3eb5384SStefan Weinhuber unsigned char format, unsigned int rec_on_trk, int count, 470f3eb5384SStefan Weinhuber unsigned int blksize, unsigned int tlf) 4718e09f215SStefan Weinhuber { 4728e09f215SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 473f3eb5384SStefan Weinhuber struct DE_eckd_data *dedata; 474f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 475b44b0ab3SStefan Weinhuber u32 begcyl, endcyl; 476b44b0ab3SStefan Weinhuber u16 heads, beghead, endhead; 4778e09f215SStefan Weinhuber int rc = 0; 4788e09f215SStefan Weinhuber 4798e09f215SStefan Weinhuber basepriv = (struct dasd_eckd_private *) basedev->private; 4808e09f215SStefan Weinhuber startpriv = (struct dasd_eckd_private *) startdev->private; 481f3eb5384SStefan Weinhuber dedata = &pfxdata->define_extent; 482f3eb5384SStefan Weinhuber lredata = &pfxdata->locate_record; 4838e09f215SStefan Weinhuber 4848e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PFX; 4858e09f215SStefan Weinhuber ccw->flags = 0; 486e4dbb0f2SStefan Haberland if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) { 487e4dbb0f2SStefan Haberland ccw->count = sizeof(*pfxdata) + 2; 488e4dbb0f2SStefan Haberland ccw->cda = (__u32) __pa(pfxdata); 489e4dbb0f2SStefan Haberland memset(pfxdata, 0, sizeof(*pfxdata) + 2); 490e4dbb0f2SStefan Haberland } else { 4918e09f215SStefan Weinhuber ccw->count = sizeof(*pfxdata); 4928e09f215SStefan Weinhuber ccw->cda = (__u32) __pa(pfxdata); 4938e09f215SStefan Weinhuber memset(pfxdata, 0, sizeof(*pfxdata)); 494e4dbb0f2SStefan Haberland } 495e4dbb0f2SStefan Haberland 4968e09f215SStefan Weinhuber /* prefix data */ 497f3eb5384SStefan Weinhuber if (format > 1) { 498f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 499f3eb5384SStefan Weinhuber "PFX LRE unknown format 0x%x", format); 500f3eb5384SStefan Weinhuber BUG(); 501f3eb5384SStefan Weinhuber return -EINVAL; 502f3eb5384SStefan Weinhuber } 503f3eb5384SStefan Weinhuber pfxdata->format = format; 5044abb08c2SStefan Weinhuber pfxdata->base_address = basepriv->ned->unit_addr; 5054abb08c2SStefan Weinhuber pfxdata->base_lss = basepriv->ned->ID; 506f3eb5384SStefan Weinhuber pfxdata->validity.define_extent = 1; 5078e09f215SStefan Weinhuber 5088e09f215SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 5098e09f215SStefan Weinhuber if (startpriv->uid.type != UA_BASE_DEVICE) { 5108e09f215SStefan Weinhuber pfxdata->validity.verify_base = 1; 5118e09f215SStefan Weinhuber if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 5128e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 1; 5138e09f215SStefan Weinhuber } 5148e09f215SStefan Weinhuber 5158e09f215SStefan Weinhuber /* define extend data (mostly)*/ 5168e09f215SStefan Weinhuber switch (cmd) { 5178e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_HOME_ADDRESS: 5188e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_RECORD_ZERO: 5198e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ: 5208e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_MT: 5218e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD: 5228e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD_MT: 5238e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_KD: 5248e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_KD_MT: 5258e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_COUNT: 526f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 527f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 528f3eb5384SStefan Weinhuber break; 529e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_READ_TRACK: 530f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 531f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 532f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 533f3eb5384SStefan Weinhuber dedata->blk_size = 0; 5348e09f215SStefan Weinhuber break; 5358e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE: 5368e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_MT: 5378e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD: 5388e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD_MT: 539f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 540f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 5418e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 5428e09f215SStefan Weinhuber break; 5438e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD: 5448e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD_MT: 545f3eb5384SStefan Weinhuber dedata->attributes.operation = DASD_BYPASS_CACHE; 5468e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 5478e09f215SStefan Weinhuber break; 5488e09f215SStefan Weinhuber case DASD_ECKD_CCW_ERASE: 5498e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 5508e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 551f3eb5384SStefan Weinhuber dedata->mask.perm = 0x3; 552f3eb5384SStefan Weinhuber dedata->mask.auth = 0x1; 553f3eb5384SStefan Weinhuber dedata->attributes.operation = DASD_BYPASS_CACHE; 554f3eb5384SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 555f3eb5384SStefan Weinhuber break; 556e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_WRITE_FULL_TRACK: 557e4dbb0f2SStefan Haberland dedata->mask.perm = 0x03; 558e4dbb0f2SStefan Haberland dedata->attributes.operation = basepriv->attrib.operation; 559e4dbb0f2SStefan Haberland dedata->blk_size = 0; 560e4dbb0f2SStefan Haberland break; 561f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 562f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 563f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 564f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 5658e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 5668e09f215SStefan Weinhuber break; 5678e09f215SStefan Weinhuber default: 568f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 569f3eb5384SStefan Weinhuber "PFX LRE unknown opcode 0x%x", cmd); 570f3eb5384SStefan Weinhuber BUG(); 571f3eb5384SStefan Weinhuber return -EINVAL; 5728e09f215SStefan Weinhuber } 5738e09f215SStefan Weinhuber 574f3eb5384SStefan Weinhuber dedata->attributes.mode = 0x3; /* ECKD */ 5758e09f215SStefan Weinhuber 5768e09f215SStefan Weinhuber if ((basepriv->rdc_data.cu_type == 0x2105 || 5778e09f215SStefan Weinhuber basepriv->rdc_data.cu_type == 0x2107 || 5788e09f215SStefan Weinhuber basepriv->rdc_data.cu_type == 0x1750) 5798e09f215SStefan Weinhuber && !(basepriv->uses_cdl && trk < 2)) 580f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x40; /* Regular Data Format Mode */ 5818e09f215SStefan Weinhuber 582b44b0ab3SStefan Weinhuber heads = basepriv->rdc_data.trk_per_cyl; 583b44b0ab3SStefan Weinhuber begcyl = trk / heads; 584b44b0ab3SStefan Weinhuber beghead = trk % heads; 585b44b0ab3SStefan Weinhuber endcyl = totrk / heads; 586b44b0ab3SStefan Weinhuber endhead = totrk % heads; 5878e09f215SStefan Weinhuber 5888e09f215SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 589f3eb5384SStefan Weinhuber if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 590f3eb5384SStefan Weinhuber dedata->attributes.operation == DASD_SEQ_ACCESS) { 5918e09f215SStefan Weinhuber 592b44b0ab3SStefan Weinhuber if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 593b44b0ab3SStefan Weinhuber endcyl += basepriv->attrib.nr_cyl; 5948e09f215SStefan Weinhuber else 595b44b0ab3SStefan Weinhuber endcyl = (basepriv->real_cyl - 1); 5968e09f215SStefan Weinhuber } 5978e09f215SStefan Weinhuber 598f3eb5384SStefan Weinhuber set_ch_t(&dedata->beg_ext, begcyl, beghead); 599f3eb5384SStefan Weinhuber set_ch_t(&dedata->end_ext, endcyl, endhead); 600f3eb5384SStefan Weinhuber 601f3eb5384SStefan Weinhuber if (format == 1) { 602f3eb5384SStefan Weinhuber fill_LRE_data(lredata, trk, rec_on_trk, count, cmd, 603f3eb5384SStefan Weinhuber basedev, blksize, tlf); 604f3eb5384SStefan Weinhuber } 605f3eb5384SStefan Weinhuber 6068e09f215SStefan Weinhuber return rc; 6078e09f215SStefan Weinhuber } 6088e09f215SStefan Weinhuber 609f3eb5384SStefan Weinhuber static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 610f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 611f3eb5384SStefan Weinhuber struct dasd_device *basedev, struct dasd_device *startdev) 612f3eb5384SStefan Weinhuber { 613f3eb5384SStefan Weinhuber return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev, 614f3eb5384SStefan Weinhuber 0, 0, 0, 0, 0); 615f3eb5384SStefan Weinhuber } 616f3eb5384SStefan Weinhuber 6174d284cacSHeiko Carstens static void 618b44b0ab3SStefan Weinhuber locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk, 619b44b0ab3SStefan Weinhuber unsigned int rec_on_trk, int no_rec, int cmd, 6201da177e4SLinus Torvalds struct dasd_device * device, int reclen) 6211da177e4SLinus Torvalds { 6221da177e4SLinus Torvalds struct dasd_eckd_private *private; 6231da177e4SLinus Torvalds int sector; 6241da177e4SLinus Torvalds int dn, d; 6251da177e4SLinus Torvalds 6261da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 6271da177e4SLinus Torvalds 6281da177e4SLinus Torvalds DBF_DEV_EVENT(DBF_INFO, device, 6291da177e4SLinus Torvalds "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", 6301da177e4SLinus Torvalds trk, rec_on_trk, no_rec, cmd, reclen); 6311da177e4SLinus Torvalds 6321da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; 6331da177e4SLinus Torvalds ccw->flags = 0; 6341da177e4SLinus Torvalds ccw->count = 16; 6351da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 6361da177e4SLinus Torvalds 6371da177e4SLinus Torvalds memset(data, 0, sizeof(struct LO_eckd_data)); 6381da177e4SLinus Torvalds sector = 0; 6391da177e4SLinus Torvalds if (rec_on_trk) { 6401da177e4SLinus Torvalds switch (private->rdc_data.dev_type) { 6411da177e4SLinus Torvalds case 0x3390: 6421da177e4SLinus Torvalds dn = ceil_quot(reclen + 6, 232); 6431da177e4SLinus Torvalds d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 6441da177e4SLinus Torvalds sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 6451da177e4SLinus Torvalds break; 6461da177e4SLinus Torvalds case 0x3380: 6471da177e4SLinus Torvalds d = 7 + ceil_quot(reclen + 12, 32); 6481da177e4SLinus Torvalds sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 6491da177e4SLinus Torvalds break; 6501da177e4SLinus Torvalds } 6511da177e4SLinus Torvalds } 6521da177e4SLinus Torvalds data->sector = sector; 6531da177e4SLinus Torvalds data->count = no_rec; 6541da177e4SLinus Torvalds switch (cmd) { 6551da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 6561da177e4SLinus Torvalds data->operation.orientation = 0x3; 6571da177e4SLinus Torvalds data->operation.operation = 0x03; 6581da177e4SLinus Torvalds break; 6591da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 6601da177e4SLinus Torvalds data->operation.orientation = 0x3; 6611da177e4SLinus Torvalds data->operation.operation = 0x16; 6621da177e4SLinus Torvalds break; 6631da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 6641da177e4SLinus Torvalds data->operation.orientation = 0x1; 6651da177e4SLinus Torvalds data->operation.operation = 0x03; 6661da177e4SLinus Torvalds data->count++; 6671da177e4SLinus Torvalds break; 6681da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 6691da177e4SLinus Torvalds data->operation.orientation = 0x3; 6701da177e4SLinus Torvalds data->operation.operation = 0x16; 6711da177e4SLinus Torvalds data->count++; 6721da177e4SLinus Torvalds break; 6731da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 6741da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 6751da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 6761da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 6771da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6781da177e4SLinus Torvalds data->length = reclen; 6791da177e4SLinus Torvalds data->operation.operation = 0x01; 6801da177e4SLinus Torvalds break; 6811da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 6821da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 6831da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6841da177e4SLinus Torvalds data->length = reclen; 6851da177e4SLinus Torvalds data->operation.operation = 0x03; 6861da177e4SLinus Torvalds break; 6871da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 6881da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 6891da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 6901da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 6911da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6921da177e4SLinus Torvalds data->length = reclen; 6931da177e4SLinus Torvalds data->operation.operation = 0x06; 6941da177e4SLinus Torvalds break; 6951da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 6961da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 6971da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6981da177e4SLinus Torvalds data->length = reclen; 6991da177e4SLinus Torvalds data->operation.operation = 0x16; 7001da177e4SLinus Torvalds break; 7011da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_COUNT: 7021da177e4SLinus Torvalds data->operation.operation = 0x06; 7031da177e4SLinus Torvalds break; 7041da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 7051da177e4SLinus Torvalds data->length = reclen; 7061da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 7071da177e4SLinus Torvalds data->operation.operation = 0x0b; 7081da177e4SLinus Torvalds break; 7091da177e4SLinus Torvalds default: 710fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record " 711fc19f381SStefan Haberland "opcode 0x%x", cmd); 7121da177e4SLinus Torvalds } 713b44b0ab3SStefan Weinhuber set_ch_t(&data->seek_addr, 714b44b0ab3SStefan Weinhuber trk / private->rdc_data.trk_per_cyl, 715b44b0ab3SStefan Weinhuber trk % private->rdc_data.trk_per_cyl); 716b44b0ab3SStefan Weinhuber data->search_arg.cyl = data->seek_addr.cyl; 717b44b0ab3SStefan Weinhuber data->search_arg.head = data->seek_addr.head; 7181da177e4SLinus Torvalds data->search_arg.record = rec_on_trk; 7191da177e4SLinus Torvalds } 7201da177e4SLinus Torvalds 7211da177e4SLinus Torvalds /* 7221da177e4SLinus Torvalds * Returns 1 if the block is one of the special blocks that needs 7231da177e4SLinus Torvalds * to get read/written with the KD variant of the command. 7241da177e4SLinus Torvalds * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and 7251da177e4SLinus Torvalds * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. 7261da177e4SLinus Torvalds * Luckily the KD variants differ only by one bit (0x08) from the 7271da177e4SLinus Torvalds * normal variant. So don't wonder about code like: 7281da177e4SLinus Torvalds * if (dasd_eckd_cdl_special(blk_per_trk, recid)) 7291da177e4SLinus Torvalds * ccw->cmd_code |= 0x8; 7301da177e4SLinus Torvalds */ 7311da177e4SLinus Torvalds static inline int 7321da177e4SLinus Torvalds dasd_eckd_cdl_special(int blk_per_trk, int recid) 7331da177e4SLinus Torvalds { 7341da177e4SLinus Torvalds if (recid < 3) 7351da177e4SLinus Torvalds return 1; 7361da177e4SLinus Torvalds if (recid < blk_per_trk) 7371da177e4SLinus Torvalds return 0; 7381da177e4SLinus Torvalds if (recid < 2 * blk_per_trk) 7391da177e4SLinus Torvalds return 1; 7401da177e4SLinus Torvalds return 0; 7411da177e4SLinus Torvalds } 7421da177e4SLinus Torvalds 7431da177e4SLinus Torvalds /* 7441da177e4SLinus Torvalds * Returns the record size for the special blocks of the cdl format. 7451da177e4SLinus Torvalds * Only returns something useful if dasd_eckd_cdl_special is true 7461da177e4SLinus Torvalds * for the recid. 7471da177e4SLinus Torvalds */ 7481da177e4SLinus Torvalds static inline int 7491da177e4SLinus Torvalds dasd_eckd_cdl_reclen(int recid) 7501da177e4SLinus Torvalds { 7511da177e4SLinus Torvalds if (recid < 3) 7521da177e4SLinus Torvalds return sizes_trk0[recid]; 7531da177e4SLinus Torvalds return LABEL_SIZE; 7541da177e4SLinus Torvalds } 755b206181dSStefan Haberland /* create unique id from private structure. */ 756b206181dSStefan Haberland static void create_uid(struct dasd_eckd_private *private) 7573d052595SHorst Hummel { 7584abb08c2SStefan Weinhuber int count; 759b206181dSStefan Haberland struct dasd_uid *uid; 7603d052595SHorst Hummel 7612dedf0d9SStefan Haberland uid = &private->uid; 7623d052595SHorst Hummel memset(uid, 0, sizeof(struct dasd_uid)); 7634abb08c2SStefan Weinhuber memcpy(uid->vendor, private->ned->HDA_manufacturer, 7643d052595SHorst Hummel sizeof(uid->vendor) - 1); 7653d052595SHorst Hummel EBCASC(uid->vendor, sizeof(uid->vendor) - 1); 7664abb08c2SStefan Weinhuber memcpy(uid->serial, private->ned->HDA_location, 7673d052595SHorst Hummel sizeof(uid->serial) - 1); 7683d052595SHorst Hummel EBCASC(uid->serial, sizeof(uid->serial) - 1); 7694abb08c2SStefan Weinhuber uid->ssid = private->gneq->subsystemID; 770a419aef8SJoe Perches uid->real_unit_addr = private->ned->unit_addr; 7714abb08c2SStefan Weinhuber if (private->sneq) { 7724abb08c2SStefan Weinhuber uid->type = private->sneq->sua_flags; 7738e09f215SStefan Weinhuber if (uid->type == UA_BASE_PAV_ALIAS) 7744abb08c2SStefan Weinhuber uid->base_unit_addr = private->sneq->base_unit_addr; 7758e09f215SStefan Weinhuber } else { 7768e09f215SStefan Weinhuber uid->type = UA_BASE_DEVICE; 7778e09f215SStefan Weinhuber } 7784abb08c2SStefan Weinhuber if (private->vdsneq) { 7794abb08c2SStefan Weinhuber for (count = 0; count < 16; count++) { 7804abb08c2SStefan Weinhuber sprintf(uid->vduit+2*count, "%02x", 7814abb08c2SStefan Weinhuber private->vdsneq->uit[count]); 7824abb08c2SStefan Weinhuber } 7834abb08c2SStefan Weinhuber } 784b206181dSStefan Haberland } 785b206181dSStefan Haberland 786b206181dSStefan Haberland /* 787b206181dSStefan Haberland * Generate device unique id that specifies the physical device. 788b206181dSStefan Haberland */ 789b206181dSStefan Haberland static int dasd_eckd_generate_uid(struct dasd_device *device) 790b206181dSStefan Haberland { 791b206181dSStefan Haberland struct dasd_eckd_private *private; 792b206181dSStefan Haberland unsigned long flags; 793b206181dSStefan Haberland 794b206181dSStefan Haberland private = (struct dasd_eckd_private *) device->private; 795b206181dSStefan Haberland if (!private) 796b206181dSStefan Haberland return -ENODEV; 797b206181dSStefan Haberland if (!private->ned || !private->gneq) 798b206181dSStefan Haberland return -ENODEV; 799b206181dSStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 800b206181dSStefan Haberland create_uid(private); 8012dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 8023d052595SHorst Hummel return 0; 8033d052595SHorst Hummel } 8043d052595SHorst Hummel 8052dedf0d9SStefan Haberland static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid) 8062dedf0d9SStefan Haberland { 8072dedf0d9SStefan Haberland struct dasd_eckd_private *private; 8082dedf0d9SStefan Haberland unsigned long flags; 8092dedf0d9SStefan Haberland 8102dedf0d9SStefan Haberland if (device->private) { 8112dedf0d9SStefan Haberland private = (struct dasd_eckd_private *)device->private; 8122dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 8132dedf0d9SStefan Haberland *uid = private->uid; 8142dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 8152dedf0d9SStefan Haberland return 0; 8162dedf0d9SStefan Haberland } 8172dedf0d9SStefan Haberland return -EINVAL; 8182dedf0d9SStefan Haberland } 8192dedf0d9SStefan Haberland 820b206181dSStefan Haberland /* 821b206181dSStefan Haberland * compare device UID with data of a given dasd_eckd_private structure 822b206181dSStefan Haberland * return 0 for match 823b206181dSStefan Haberland */ 824b206181dSStefan Haberland static int dasd_eckd_compare_path_uid(struct dasd_device *device, 825b206181dSStefan Haberland struct dasd_eckd_private *private) 826b206181dSStefan Haberland { 827b206181dSStefan Haberland struct dasd_uid device_uid; 828b206181dSStefan Haberland 829b206181dSStefan Haberland create_uid(private); 830b206181dSStefan Haberland dasd_eckd_get_uid(device, &device_uid); 831b206181dSStefan Haberland 832b206181dSStefan Haberland return memcmp(&device_uid, &private->uid, sizeof(struct dasd_uid)); 833b206181dSStefan Haberland } 834b206181dSStefan Haberland 835a4d26c6aSStefan Weinhuber static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device, 836a4d26c6aSStefan Weinhuber struct dasd_ccw_req *cqr, 837a4d26c6aSStefan Weinhuber __u8 *rcd_buffer, 838a4d26c6aSStefan Weinhuber __u8 lpm) 83917283b56SCornelia Huck { 84017283b56SCornelia Huck struct ccw1 *ccw; 841a4d26c6aSStefan Weinhuber /* 842a4d26c6aSStefan Weinhuber * buffer has to start with EBCDIC "V1.0" to show 843a4d26c6aSStefan Weinhuber * support for virtual device SNEQ 844a4d26c6aSStefan Weinhuber */ 845a4d26c6aSStefan Weinhuber rcd_buffer[0] = 0xE5; 846a4d26c6aSStefan Weinhuber rcd_buffer[1] = 0xF1; 847a4d26c6aSStefan Weinhuber rcd_buffer[2] = 0x4B; 848a4d26c6aSStefan Weinhuber rcd_buffer[3] = 0xF0; 84917283b56SCornelia Huck 85017283b56SCornelia Huck ccw = cqr->cpaddr; 851a4d26c6aSStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RCD; 852a4d26c6aSStefan Weinhuber ccw->flags = 0; 85317283b56SCornelia Huck ccw->cda = (__u32)(addr_t)rcd_buffer; 854a4d26c6aSStefan Weinhuber ccw->count = DASD_ECKD_RCD_DATA_SIZE; 855a4d26c6aSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 85617283b56SCornelia Huck 8578e09f215SStefan Weinhuber cqr->startdev = device; 8588e09f215SStefan Weinhuber cqr->memdev = device; 8598e09f215SStefan Weinhuber cqr->block = NULL; 86017283b56SCornelia Huck cqr->expires = 10*HZ; 86117283b56SCornelia Huck cqr->lpm = lpm; 862eb6e199bSStefan Weinhuber cqr->retries = 256; 86317283b56SCornelia Huck cqr->buildclk = get_clock(); 86417283b56SCornelia Huck cqr->status = DASD_CQR_FILLED; 865a4d26c6aSStefan Weinhuber set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 866a4d26c6aSStefan Weinhuber } 867a4d26c6aSStefan Weinhuber 8685915a873SStefan Haberland /* 8695915a873SStefan Haberland * Wakeup helper for read_conf 8705915a873SStefan Haberland * if the cqr is not done and needs some error recovery 8715915a873SStefan Haberland * the buffer has to be re-initialized with the EBCDIC "V1.0" 8725915a873SStefan Haberland * to show support for virtual device SNEQ 8735915a873SStefan Haberland */ 8745915a873SStefan Haberland static void read_conf_cb(struct dasd_ccw_req *cqr, void *data) 8755915a873SStefan Haberland { 8765915a873SStefan Haberland struct ccw1 *ccw; 8775915a873SStefan Haberland __u8 *rcd_buffer; 8785915a873SStefan Haberland 8795915a873SStefan Haberland if (cqr->status != DASD_CQR_DONE) { 8805915a873SStefan Haberland ccw = cqr->cpaddr; 8815915a873SStefan Haberland rcd_buffer = (__u8 *)((addr_t) ccw->cda); 8825915a873SStefan Haberland memset(rcd_buffer, 0, sizeof(*rcd_buffer)); 8835915a873SStefan Haberland 8845915a873SStefan Haberland rcd_buffer[0] = 0xE5; 8855915a873SStefan Haberland rcd_buffer[1] = 0xF1; 8865915a873SStefan Haberland rcd_buffer[2] = 0x4B; 8875915a873SStefan Haberland rcd_buffer[3] = 0xF0; 8885915a873SStefan Haberland } 8895915a873SStefan Haberland dasd_wakeup_cb(cqr, data); 8905915a873SStefan Haberland } 8915915a873SStefan Haberland 892a4d26c6aSStefan Weinhuber static int dasd_eckd_read_conf_immediately(struct dasd_device *device, 893a4d26c6aSStefan Weinhuber struct dasd_ccw_req *cqr, 894a4d26c6aSStefan Weinhuber __u8 *rcd_buffer, 895a4d26c6aSStefan Weinhuber __u8 lpm) 896a4d26c6aSStefan Weinhuber { 897a4d26c6aSStefan Weinhuber struct ciw *ciw; 898a4d26c6aSStefan Weinhuber int rc; 899a4d26c6aSStefan Weinhuber /* 900a4d26c6aSStefan Weinhuber * sanity check: scan for RCD command in extended SenseID data 901a4d26c6aSStefan Weinhuber * some devices do not support RCD 902a4d26c6aSStefan Weinhuber */ 903a4d26c6aSStefan Weinhuber ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 904a4d26c6aSStefan Weinhuber if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) 905a4d26c6aSStefan Weinhuber return -EOPNOTSUPP; 906a4d26c6aSStefan Weinhuber 907a4d26c6aSStefan Weinhuber dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm); 908a4d26c6aSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 9095a27e60dSStefan Weinhuber set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 910a4d26c6aSStefan Weinhuber cqr->retries = 5; 9115915a873SStefan Haberland cqr->callback = read_conf_cb; 912a4d26c6aSStefan Weinhuber rc = dasd_sleep_on_immediatly(cqr); 913a4d26c6aSStefan Weinhuber return rc; 91417283b56SCornelia Huck } 91517283b56SCornelia Huck 91617283b56SCornelia Huck static int dasd_eckd_read_conf_lpm(struct dasd_device *device, 91717283b56SCornelia Huck void **rcd_buffer, 91817283b56SCornelia Huck int *rcd_buffer_size, __u8 lpm) 91917283b56SCornelia Huck { 92017283b56SCornelia Huck struct ciw *ciw; 92117283b56SCornelia Huck char *rcd_buf = NULL; 92217283b56SCornelia Huck int ret; 92317283b56SCornelia Huck struct dasd_ccw_req *cqr; 92417283b56SCornelia Huck 92517283b56SCornelia Huck /* 926a4d26c6aSStefan Weinhuber * sanity check: scan for RCD command in extended SenseID data 927a4d26c6aSStefan Weinhuber * some devices do not support RCD 92817283b56SCornelia Huck */ 92917283b56SCornelia Huck ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 930a4d26c6aSStefan Weinhuber if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) { 93117283b56SCornelia Huck ret = -EOPNOTSUPP; 93217283b56SCornelia Huck goto out_error; 93317283b56SCornelia Huck } 934a4d26c6aSStefan Weinhuber rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA); 93517283b56SCornelia Huck if (!rcd_buf) { 93617283b56SCornelia Huck ret = -ENOMEM; 93717283b56SCornelia Huck goto out_error; 93817283b56SCornelia Huck } 939a4d26c6aSStefan Weinhuber cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, 940a4d26c6aSStefan Weinhuber 0, /* use rcd_buf as data ara */ 941a4d26c6aSStefan Weinhuber device); 94217283b56SCornelia Huck if (IS_ERR(cqr)) { 943a4d26c6aSStefan Weinhuber DBF_DEV_EVENT(DBF_WARNING, device, "%s", 944a4d26c6aSStefan Weinhuber "Could not allocate RCD request"); 945a4d26c6aSStefan Weinhuber ret = -ENOMEM; 94617283b56SCornelia Huck goto out_error; 94717283b56SCornelia Huck } 948a4d26c6aSStefan Weinhuber dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm); 9495915a873SStefan Haberland cqr->callback = read_conf_cb; 95017283b56SCornelia Huck ret = dasd_sleep_on(cqr); 95117283b56SCornelia Huck /* 95217283b56SCornelia Huck * on success we update the user input parms 95317283b56SCornelia Huck */ 9548e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 95517283b56SCornelia Huck if (ret) 95617283b56SCornelia Huck goto out_error; 95717283b56SCornelia Huck 958a4d26c6aSStefan Weinhuber *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE; 95917283b56SCornelia Huck *rcd_buffer = rcd_buf; 96017283b56SCornelia Huck return 0; 96117283b56SCornelia Huck out_error: 96217283b56SCornelia Huck kfree(rcd_buf); 96317283b56SCornelia Huck *rcd_buffer = NULL; 96417283b56SCornelia Huck *rcd_buffer_size = 0; 96517283b56SCornelia Huck return ret; 96617283b56SCornelia Huck } 96717283b56SCornelia Huck 9684abb08c2SStefan Weinhuber static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private) 9694abb08c2SStefan Weinhuber { 9704abb08c2SStefan Weinhuber 9714abb08c2SStefan Weinhuber struct dasd_sneq *sneq; 9724abb08c2SStefan Weinhuber int i, count; 9734abb08c2SStefan Weinhuber 9744abb08c2SStefan Weinhuber private->ned = NULL; 9754abb08c2SStefan Weinhuber private->sneq = NULL; 9764abb08c2SStefan Weinhuber private->vdsneq = NULL; 9774abb08c2SStefan Weinhuber private->gneq = NULL; 9784abb08c2SStefan Weinhuber count = private->conf_len / sizeof(struct dasd_sneq); 9794abb08c2SStefan Weinhuber sneq = (struct dasd_sneq *)private->conf_data; 9804abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 9814abb08c2SStefan Weinhuber if (sneq->flags.identifier == 1 && sneq->format == 1) 9824abb08c2SStefan Weinhuber private->sneq = sneq; 9834abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 1 && sneq->format == 4) 9844abb08c2SStefan Weinhuber private->vdsneq = (struct vd_sneq *)sneq; 9854abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 2) 9864abb08c2SStefan Weinhuber private->gneq = (struct dasd_gneq *)sneq; 9874abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 3 && sneq->res1 == 1) 9884abb08c2SStefan Weinhuber private->ned = (struct dasd_ned *)sneq; 9894abb08c2SStefan Weinhuber sneq++; 9904abb08c2SStefan Weinhuber } 9914abb08c2SStefan Weinhuber if (!private->ned || !private->gneq) { 9924abb08c2SStefan Weinhuber private->ned = NULL; 9934abb08c2SStefan Weinhuber private->sneq = NULL; 9944abb08c2SStefan Weinhuber private->vdsneq = NULL; 9954abb08c2SStefan Weinhuber private->gneq = NULL; 9964abb08c2SStefan Weinhuber return -EINVAL; 9974abb08c2SStefan Weinhuber } 9984abb08c2SStefan Weinhuber return 0; 9994abb08c2SStefan Weinhuber 10004abb08c2SStefan Weinhuber }; 10014abb08c2SStefan Weinhuber 10024abb08c2SStefan Weinhuber static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len) 10034abb08c2SStefan Weinhuber { 10044abb08c2SStefan Weinhuber struct dasd_gneq *gneq; 10054abb08c2SStefan Weinhuber int i, count, found; 10064abb08c2SStefan Weinhuber 10074abb08c2SStefan Weinhuber count = conf_len / sizeof(*gneq); 10084abb08c2SStefan Weinhuber gneq = (struct dasd_gneq *)conf_data; 10094abb08c2SStefan Weinhuber found = 0; 10104abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 10114abb08c2SStefan Weinhuber if (gneq->flags.identifier == 2) { 10124abb08c2SStefan Weinhuber found = 1; 10134abb08c2SStefan Weinhuber break; 10144abb08c2SStefan Weinhuber } 10154abb08c2SStefan Weinhuber gneq++; 10164abb08c2SStefan Weinhuber } 10174abb08c2SStefan Weinhuber if (found) 10184abb08c2SStefan Weinhuber return ((char *)gneq)[18] & 0x07; 10194abb08c2SStefan Weinhuber else 10204abb08c2SStefan Weinhuber return 0; 10214abb08c2SStefan Weinhuber } 10224abb08c2SStefan Weinhuber 10234abb08c2SStefan Weinhuber static int dasd_eckd_read_conf(struct dasd_device *device) 10241da177e4SLinus Torvalds { 10251da177e4SLinus Torvalds void *conf_data; 10261da177e4SLinus Torvalds int conf_len, conf_data_saved; 10271da177e4SLinus Torvalds int rc; 1028a4d26c6aSStefan Weinhuber __u8 lpm, opm; 1029b206181dSStefan Haberland struct dasd_eckd_private *private, path_private; 1030a4d26c6aSStefan Weinhuber struct dasd_path *path_data; 1031b206181dSStefan Haberland struct dasd_uid *uid; 1032b206181dSStefan Haberland char print_path_uid[60], print_device_uid[60]; 10331da177e4SLinus Torvalds 10341da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 1035a4d26c6aSStefan Weinhuber path_data = &device->path_data; 1036a4d26c6aSStefan Weinhuber opm = ccw_device_get_path_mask(device->cdev); 10371da177e4SLinus Torvalds conf_data_saved = 0; 10381da177e4SLinus Torvalds /* get configuration data per operational path */ 10391da177e4SLinus Torvalds for (lpm = 0x80; lpm; lpm>>= 1) { 1040b206181dSStefan Haberland if (!(lpm & opm)) 1041b206181dSStefan Haberland continue; 104217283b56SCornelia Huck rc = dasd_eckd_read_conf_lpm(device, &conf_data, 10431da177e4SLinus Torvalds &conf_len, lpm); 10441da177e4SLinus Torvalds if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ 1045b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 10461da177e4SLinus Torvalds "Read configuration data returned " 1047b8ed5dd5SStefan Haberland "error %d", rc); 10481da177e4SLinus Torvalds return rc; 10491da177e4SLinus Torvalds } 10501da177e4SLinus Torvalds if (conf_data == NULL) { 1051b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1052b8ed5dd5SStefan Haberland "No configuration data " 1053b8ed5dd5SStefan Haberland "retrieved"); 1054a4d26c6aSStefan Weinhuber /* no further analysis possible */ 1055a4d26c6aSStefan Weinhuber path_data->opm |= lpm; 1056d133a960SGabriel Craciunescu continue; /* no error */ 10571da177e4SLinus Torvalds } 10581da177e4SLinus Torvalds /* save first valid configuration data */ 10591da177e4SLinus Torvalds if (!conf_data_saved) { 10604abb08c2SStefan Weinhuber kfree(private->conf_data); 10614abb08c2SStefan Weinhuber private->conf_data = conf_data; 10624abb08c2SStefan Weinhuber private->conf_len = conf_len; 10634abb08c2SStefan Weinhuber if (dasd_eckd_identify_conf_parts(private)) { 10644abb08c2SStefan Weinhuber private->conf_data = NULL; 10654abb08c2SStefan Weinhuber private->conf_len = 0; 10664abb08c2SStefan Weinhuber kfree(conf_data); 10674abb08c2SStefan Weinhuber continue; 10684abb08c2SStefan Weinhuber } 1069b206181dSStefan Haberland /* 1070b206181dSStefan Haberland * build device UID that other path data 1071b206181dSStefan Haberland * can be compared to it 1072b206181dSStefan Haberland */ 1073b206181dSStefan Haberland dasd_eckd_generate_uid(device); 10741da177e4SLinus Torvalds conf_data_saved++; 1075b206181dSStefan Haberland } else { 1076b206181dSStefan Haberland path_private.conf_data = conf_data; 1077b206181dSStefan Haberland path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1078b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts( 1079b206181dSStefan Haberland &path_private)) { 1080b206181dSStefan Haberland path_private.conf_data = NULL; 1081b206181dSStefan Haberland path_private.conf_len = 0; 1082b206181dSStefan Haberland kfree(conf_data); 1083b206181dSStefan Haberland continue; 1084b206181dSStefan Haberland } 1085b206181dSStefan Haberland 1086b206181dSStefan Haberland if (dasd_eckd_compare_path_uid( 1087b206181dSStefan Haberland device, &path_private)) { 1088b206181dSStefan Haberland uid = &path_private.uid; 1089b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1090b206181dSStefan Haberland snprintf(print_path_uid, 1091b206181dSStefan Haberland sizeof(print_path_uid), 1092b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1093b206181dSStefan Haberland uid->vendor, uid->serial, 1094b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1095b206181dSStefan Haberland uid->vduit); 1096b206181dSStefan Haberland else 1097b206181dSStefan Haberland snprintf(print_path_uid, 1098b206181dSStefan Haberland sizeof(print_path_uid), 1099b206181dSStefan Haberland "%s.%s.%04x.%02x", 1100b206181dSStefan Haberland uid->vendor, uid->serial, 1101b206181dSStefan Haberland uid->ssid, 1102b206181dSStefan Haberland uid->real_unit_addr); 1103b206181dSStefan Haberland uid = &private->uid; 1104b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1105b206181dSStefan Haberland snprintf(print_device_uid, 1106b206181dSStefan Haberland sizeof(print_device_uid), 1107b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1108b206181dSStefan Haberland uid->vendor, uid->serial, 1109b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1110b206181dSStefan Haberland uid->vduit); 1111b206181dSStefan Haberland else 1112b206181dSStefan Haberland snprintf(print_device_uid, 1113b206181dSStefan Haberland sizeof(print_device_uid), 1114b206181dSStefan Haberland "%s.%s.%04x.%02x", 1115b206181dSStefan Haberland uid->vendor, uid->serial, 1116b206181dSStefan Haberland uid->ssid, 1117b206181dSStefan Haberland uid->real_unit_addr); 1118b206181dSStefan Haberland dev_err(&device->cdev->dev, 1119b206181dSStefan Haberland "Not all channel paths lead to " 1120b206181dSStefan Haberland "the same device, path %02X leads to " 1121b206181dSStefan Haberland "device %s instead of %s\n", lpm, 1122b206181dSStefan Haberland print_path_uid, print_device_uid); 1123b206181dSStefan Haberland return -EINVAL; 1124b206181dSStefan Haberland } 1125b206181dSStefan Haberland 1126b206181dSStefan Haberland path_private.conf_data = NULL; 1127b206181dSStefan Haberland path_private.conf_len = 0; 11281da177e4SLinus Torvalds } 11294abb08c2SStefan Weinhuber switch (dasd_eckd_path_access(conf_data, conf_len)) { 11301da177e4SLinus Torvalds case 0x02: 11311da177e4SLinus Torvalds path_data->npm |= lpm; 11321da177e4SLinus Torvalds break; 11331da177e4SLinus Torvalds case 0x03: 11341da177e4SLinus Torvalds path_data->ppm |= lpm; 11351da177e4SLinus Torvalds break; 11361da177e4SLinus Torvalds } 1137a4d26c6aSStefan Weinhuber path_data->opm |= lpm; 1138b206181dSStefan Haberland 11394abb08c2SStefan Weinhuber if (conf_data != private->conf_data) 11401da177e4SLinus Torvalds kfree(conf_data); 11411da177e4SLinus Torvalds } 1142b206181dSStefan Haberland 11431da177e4SLinus Torvalds return 0; 11441da177e4SLinus Torvalds } 11451da177e4SLinus Torvalds 1146a4d26c6aSStefan Weinhuber static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm) 1147a4d26c6aSStefan Weinhuber { 1148a4d26c6aSStefan Weinhuber struct dasd_eckd_private *private; 1149a4d26c6aSStefan Weinhuber int mdc; 1150a4d26c6aSStefan Weinhuber u32 fcx_max_data; 1151a4d26c6aSStefan Weinhuber 1152a4d26c6aSStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 1153a4d26c6aSStefan Weinhuber if (private->fcx_max_data) { 1154a4d26c6aSStefan Weinhuber mdc = ccw_device_get_mdc(device->cdev, lpm); 1155a4d26c6aSStefan Weinhuber if ((mdc < 0)) { 1156a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1157a4d26c6aSStefan Weinhuber "Detecting the maximum data size for zHPF " 1158a4d26c6aSStefan Weinhuber "requests failed (rc=%d) for a new path %x\n", 1159a4d26c6aSStefan Weinhuber mdc, lpm); 1160a4d26c6aSStefan Weinhuber return mdc; 1161a4d26c6aSStefan Weinhuber } 1162a4d26c6aSStefan Weinhuber fcx_max_data = mdc * FCX_MAX_DATA_FACTOR; 1163a4d26c6aSStefan Weinhuber if (fcx_max_data < private->fcx_max_data) { 1164a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1165a4d26c6aSStefan Weinhuber "The maximum data size for zHPF requests %u " 1166a4d26c6aSStefan Weinhuber "on a new path %x is below the active maximum " 1167a4d26c6aSStefan Weinhuber "%u\n", fcx_max_data, lpm, 1168a4d26c6aSStefan Weinhuber private->fcx_max_data); 1169a4d26c6aSStefan Weinhuber return -EACCES; 1170a4d26c6aSStefan Weinhuber } 1171a4d26c6aSStefan Weinhuber } 1172a4d26c6aSStefan Weinhuber return 0; 1173a4d26c6aSStefan Weinhuber } 1174a4d26c6aSStefan Weinhuber 1175b206181dSStefan Haberland static int rebuild_device_uid(struct dasd_device *device, 1176b206181dSStefan Haberland struct path_verification_work_data *data) 1177b206181dSStefan Haberland { 1178b206181dSStefan Haberland struct dasd_eckd_private *private; 1179b206181dSStefan Haberland struct dasd_path *path_data; 1180b206181dSStefan Haberland __u8 lpm, opm; 1181b206181dSStefan Haberland int rc; 1182b206181dSStefan Haberland 1183b206181dSStefan Haberland rc = -ENODEV; 1184b206181dSStefan Haberland private = (struct dasd_eckd_private *) device->private; 1185b206181dSStefan Haberland path_data = &device->path_data; 1186b206181dSStefan Haberland opm = device->path_data.opm; 1187b206181dSStefan Haberland 1188b206181dSStefan Haberland for (lpm = 0x80; lpm; lpm >>= 1) { 1189b206181dSStefan Haberland if (!(lpm & opm)) 1190b206181dSStefan Haberland continue; 1191b206181dSStefan Haberland memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1192b206181dSStefan Haberland memset(&data->cqr, 0, sizeof(data->cqr)); 1193b206181dSStefan Haberland data->cqr.cpaddr = &data->ccw; 1194b206181dSStefan Haberland rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1195b206181dSStefan Haberland data->rcd_buffer, 1196b206181dSStefan Haberland lpm); 1197b206181dSStefan Haberland 1198b206181dSStefan Haberland if (rc) { 1199b206181dSStefan Haberland if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */ 1200b206181dSStefan Haberland continue; 1201b206181dSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1202b206181dSStefan Haberland "Read configuration data " 1203b206181dSStefan Haberland "returned error %d", rc); 1204b206181dSStefan Haberland break; 1205b206181dSStefan Haberland } 1206b206181dSStefan Haberland memcpy(private->conf_data, data->rcd_buffer, 1207b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE); 1208b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts(private)) { 1209b206181dSStefan Haberland rc = -ENODEV; 1210b206181dSStefan Haberland } else /* first valid path is enough */ 1211b206181dSStefan Haberland break; 1212b206181dSStefan Haberland } 1213b206181dSStefan Haberland 1214b206181dSStefan Haberland if (!rc) 1215b206181dSStefan Haberland rc = dasd_eckd_generate_uid(device); 1216b206181dSStefan Haberland 1217b206181dSStefan Haberland return rc; 1218b206181dSStefan Haberland } 1219b206181dSStefan Haberland 1220a4d26c6aSStefan Weinhuber static void do_path_verification_work(struct work_struct *work) 1221a4d26c6aSStefan Weinhuber { 1222a4d26c6aSStefan Weinhuber struct path_verification_work_data *data; 1223a4d26c6aSStefan Weinhuber struct dasd_device *device; 1224b206181dSStefan Haberland struct dasd_eckd_private path_private; 1225b206181dSStefan Haberland struct dasd_uid *uid; 1226b206181dSStefan Haberland __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE]; 1227a4d26c6aSStefan Weinhuber __u8 lpm, opm, npm, ppm, epm; 1228a4d26c6aSStefan Weinhuber unsigned long flags; 1229b206181dSStefan Haberland char print_uid[60]; 1230a4d26c6aSStefan Weinhuber int rc; 1231a4d26c6aSStefan Weinhuber 1232a4d26c6aSStefan Weinhuber data = container_of(work, struct path_verification_work_data, worker); 1233a4d26c6aSStefan Weinhuber device = data->device; 1234a4d26c6aSStefan Weinhuber 1235c8d1c0ffSStefan Haberland /* delay path verification until device was resumed */ 1236c8d1c0ffSStefan Haberland if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 1237c8d1c0ffSStefan Haberland schedule_work(work); 1238c8d1c0ffSStefan Haberland return; 1239c8d1c0ffSStefan Haberland } 1240c8d1c0ffSStefan Haberland 1241a4d26c6aSStefan Weinhuber opm = 0; 1242a4d26c6aSStefan Weinhuber npm = 0; 1243a4d26c6aSStefan Weinhuber ppm = 0; 1244a4d26c6aSStefan Weinhuber epm = 0; 1245a4d26c6aSStefan Weinhuber for (lpm = 0x80; lpm; lpm >>= 1) { 1246b206181dSStefan Haberland if (!(lpm & data->tbvpm)) 1247b206181dSStefan Haberland continue; 1248b206181dSStefan Haberland memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1249a4d26c6aSStefan Weinhuber memset(&data->cqr, 0, sizeof(data->cqr)); 1250a4d26c6aSStefan Weinhuber data->cqr.cpaddr = &data->ccw; 1251a4d26c6aSStefan Weinhuber rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1252a4d26c6aSStefan Weinhuber data->rcd_buffer, 1253a4d26c6aSStefan Weinhuber lpm); 1254a4d26c6aSStefan Weinhuber if (!rc) { 1255a4d26c6aSStefan Weinhuber switch (dasd_eckd_path_access(data->rcd_buffer, 1256b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE) 1257b206181dSStefan Haberland ) { 1258a4d26c6aSStefan Weinhuber case 0x02: 1259a4d26c6aSStefan Weinhuber npm |= lpm; 1260a4d26c6aSStefan Weinhuber break; 1261a4d26c6aSStefan Weinhuber case 0x03: 1262a4d26c6aSStefan Weinhuber ppm |= lpm; 1263a4d26c6aSStefan Weinhuber break; 1264a4d26c6aSStefan Weinhuber } 1265a4d26c6aSStefan Weinhuber opm |= lpm; 1266a4d26c6aSStefan Weinhuber } else if (rc == -EOPNOTSUPP) { 1267a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1268a4d26c6aSStefan Weinhuber "path verification: No configuration " 1269a4d26c6aSStefan Weinhuber "data retrieved"); 1270a4d26c6aSStefan Weinhuber opm |= lpm; 1271a4d26c6aSStefan Weinhuber } else if (rc == -EAGAIN) { 1272a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1273a4d26c6aSStefan Weinhuber "path verification: device is stopped," 1274a4d26c6aSStefan Weinhuber " try again later"); 1275a4d26c6aSStefan Weinhuber epm |= lpm; 1276a4d26c6aSStefan Weinhuber } else { 1277a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1278a4d26c6aSStefan Weinhuber "Reading device feature codes failed " 1279a4d26c6aSStefan Weinhuber "(rc=%d) for new path %x\n", rc, lpm); 1280a4d26c6aSStefan Weinhuber continue; 1281a4d26c6aSStefan Weinhuber } 1282a4d26c6aSStefan Weinhuber if (verify_fcx_max_data(device, lpm)) { 1283a4d26c6aSStefan Weinhuber opm &= ~lpm; 1284a4d26c6aSStefan Weinhuber npm &= ~lpm; 1285a4d26c6aSStefan Weinhuber ppm &= ~lpm; 1286b206181dSStefan Haberland continue; 1287b206181dSStefan Haberland } 1288b206181dSStefan Haberland 1289b206181dSStefan Haberland /* 1290b206181dSStefan Haberland * save conf_data for comparison after 1291b206181dSStefan Haberland * rebuild_device_uid may have changed 1292b206181dSStefan Haberland * the original data 1293b206181dSStefan Haberland */ 1294b206181dSStefan Haberland memcpy(&path_rcd_buf, data->rcd_buffer, 1295b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE); 1296b206181dSStefan Haberland path_private.conf_data = (void *) &path_rcd_buf; 1297b206181dSStefan Haberland path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1298b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts(&path_private)) { 1299b206181dSStefan Haberland path_private.conf_data = NULL; 1300b206181dSStefan Haberland path_private.conf_len = 0; 1301b206181dSStefan Haberland continue; 1302b206181dSStefan Haberland } 1303b206181dSStefan Haberland 1304b206181dSStefan Haberland /* 1305b206181dSStefan Haberland * compare path UID with device UID only if at least 1306b206181dSStefan Haberland * one valid path is left 1307b206181dSStefan Haberland * in other case the device UID may have changed and 1308b206181dSStefan Haberland * the first working path UID will be used as device UID 1309b206181dSStefan Haberland */ 1310b206181dSStefan Haberland if (device->path_data.opm && 1311b206181dSStefan Haberland dasd_eckd_compare_path_uid(device, &path_private)) { 1312b206181dSStefan Haberland /* 1313b206181dSStefan Haberland * the comparison was not successful 1314b206181dSStefan Haberland * rebuild the device UID with at least one 1315b206181dSStefan Haberland * known path in case a z/VM hyperswap command 1316b206181dSStefan Haberland * has changed the device 1317b206181dSStefan Haberland * 1318b206181dSStefan Haberland * after this compare again 1319b206181dSStefan Haberland * 1320b206181dSStefan Haberland * if either the rebuild or the recompare fails 1321b206181dSStefan Haberland * the path can not be used 1322b206181dSStefan Haberland */ 1323b206181dSStefan Haberland if (rebuild_device_uid(device, data) || 1324b206181dSStefan Haberland dasd_eckd_compare_path_uid( 1325b206181dSStefan Haberland device, &path_private)) { 1326b206181dSStefan Haberland uid = &path_private.uid; 1327b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1328b206181dSStefan Haberland snprintf(print_uid, sizeof(print_uid), 1329b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1330b206181dSStefan Haberland uid->vendor, uid->serial, 1331b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1332b206181dSStefan Haberland uid->vduit); 1333b206181dSStefan Haberland else 1334b206181dSStefan Haberland snprintf(print_uid, sizeof(print_uid), 1335b206181dSStefan Haberland "%s.%s.%04x.%02x", 1336b206181dSStefan Haberland uid->vendor, uid->serial, 1337b206181dSStefan Haberland uid->ssid, 1338b206181dSStefan Haberland uid->real_unit_addr); 1339b206181dSStefan Haberland dev_err(&device->cdev->dev, 1340b206181dSStefan Haberland "The newly added channel path %02X " 1341b206181dSStefan Haberland "will not be used because it leads " 1342b206181dSStefan Haberland "to a different device %s\n", 1343b206181dSStefan Haberland lpm, print_uid); 1344b206181dSStefan Haberland opm &= ~lpm; 1345b206181dSStefan Haberland npm &= ~lpm; 1346b206181dSStefan Haberland ppm &= ~lpm; 1347b206181dSStefan Haberland continue; 1348a4d26c6aSStefan Weinhuber } 1349a4d26c6aSStefan Weinhuber } 1350b206181dSStefan Haberland 1351a4d26c6aSStefan Weinhuber /* 1352a4d26c6aSStefan Weinhuber * There is a small chance that a path is lost again between 1353a4d26c6aSStefan Weinhuber * above path verification and the following modification of 1354a4d26c6aSStefan Weinhuber * the device opm mask. We could avoid that race here by using 1355a4d26c6aSStefan Weinhuber * yet another path mask, but we rather deal with this unlikely 1356a4d26c6aSStefan Weinhuber * situation in dasd_start_IO. 1357a4d26c6aSStefan Weinhuber */ 1358a4d26c6aSStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1359a4d26c6aSStefan Weinhuber if (!device->path_data.opm && opm) { 1360a4d26c6aSStefan Weinhuber device->path_data.opm = opm; 1361a4d26c6aSStefan Weinhuber dasd_generic_path_operational(device); 1362a4d26c6aSStefan Weinhuber } else 1363a4d26c6aSStefan Weinhuber device->path_data.opm |= opm; 1364a4d26c6aSStefan Weinhuber device->path_data.npm |= npm; 1365a4d26c6aSStefan Weinhuber device->path_data.ppm |= ppm; 1366a4d26c6aSStefan Weinhuber device->path_data.tbvpm |= epm; 1367a4d26c6aSStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1368b206181dSStefan Haberland } 1369a4d26c6aSStefan Weinhuber 1370a4d26c6aSStefan Weinhuber dasd_put_device(device); 1371a4d26c6aSStefan Weinhuber if (data->isglobal) 1372a4d26c6aSStefan Weinhuber mutex_unlock(&dasd_path_verification_mutex); 1373a4d26c6aSStefan Weinhuber else 1374a4d26c6aSStefan Weinhuber kfree(data); 1375a4d26c6aSStefan Weinhuber } 1376a4d26c6aSStefan Weinhuber 1377a4d26c6aSStefan Weinhuber static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm) 1378a4d26c6aSStefan Weinhuber { 1379a4d26c6aSStefan Weinhuber struct path_verification_work_data *data; 1380a4d26c6aSStefan Weinhuber 1381a4d26c6aSStefan Weinhuber data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA); 1382a4d26c6aSStefan Weinhuber if (!data) { 1383a4d26c6aSStefan Weinhuber if (mutex_trylock(&dasd_path_verification_mutex)) { 1384a4d26c6aSStefan Weinhuber data = path_verification_worker; 1385a4d26c6aSStefan Weinhuber data->isglobal = 1; 1386a4d26c6aSStefan Weinhuber } else 1387a4d26c6aSStefan Weinhuber return -ENOMEM; 1388a4d26c6aSStefan Weinhuber } else { 1389a4d26c6aSStefan Weinhuber memset(data, 0, sizeof(*data)); 1390a4d26c6aSStefan Weinhuber data->isglobal = 0; 1391a4d26c6aSStefan Weinhuber } 1392a4d26c6aSStefan Weinhuber INIT_WORK(&data->worker, do_path_verification_work); 1393a4d26c6aSStefan Weinhuber dasd_get_device(device); 1394a4d26c6aSStefan Weinhuber data->device = device; 1395a4d26c6aSStefan Weinhuber data->tbvpm = lpm; 1396a4d26c6aSStefan Weinhuber schedule_work(&data->worker); 1397a4d26c6aSStefan Weinhuber return 0; 1398a4d26c6aSStefan Weinhuber } 1399a4d26c6aSStefan Weinhuber 14008e09f215SStefan Weinhuber static int dasd_eckd_read_features(struct dasd_device *device) 14018e09f215SStefan Weinhuber { 14028e09f215SStefan Weinhuber struct dasd_psf_prssd_data *prssdp; 14038e09f215SStefan Weinhuber struct dasd_rssd_features *features; 14048e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 14058e09f215SStefan Weinhuber struct ccw1 *ccw; 14068e09f215SStefan Weinhuber int rc; 14078e09f215SStefan Weinhuber struct dasd_eckd_private *private; 14088e09f215SStefan Weinhuber 14098e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 141068d1e5f0SStefan Weinhuber memset(&private->features, 0, sizeof(struct dasd_rssd_features)); 141168b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 14128e09f215SStefan Weinhuber (sizeof(struct dasd_psf_prssd_data) + 14138e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)), 14148e09f215SStefan Weinhuber device); 14158e09f215SStefan Weinhuber if (IS_ERR(cqr)) { 1416b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " 1417b8ed5dd5SStefan Haberland "allocate initialization request"); 14188e09f215SStefan Weinhuber return PTR_ERR(cqr); 14198e09f215SStefan Weinhuber } 14208e09f215SStefan Weinhuber cqr->startdev = device; 14218e09f215SStefan Weinhuber cqr->memdev = device; 14228e09f215SStefan Weinhuber cqr->block = NULL; 1423eb6e199bSStefan Weinhuber cqr->retries = 256; 14248e09f215SStefan Weinhuber cqr->expires = 10 * HZ; 14258e09f215SStefan Weinhuber 14268e09f215SStefan Weinhuber /* Prepare for Read Subsystem Data */ 14278e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 14288e09f215SStefan Weinhuber memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 14298e09f215SStefan Weinhuber prssdp->order = PSF_ORDER_PRSSD; 14308e09f215SStefan Weinhuber prssdp->suborder = 0x41; /* Read Feature Codes */ 14318e09f215SStefan Weinhuber /* all other bytes of prssdp must be zero */ 14328e09f215SStefan Weinhuber 14338e09f215SStefan Weinhuber ccw = cqr->cpaddr; 14348e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PSF; 14358e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_psf_prssd_data); 14368e09f215SStefan Weinhuber ccw->flags |= CCW_FLAG_CC; 14378e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) prssdp; 14388e09f215SStefan Weinhuber 14398e09f215SStefan Weinhuber /* Read Subsystem Data - feature codes */ 14408e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 14418e09f215SStefan Weinhuber memset(features, 0, sizeof(struct dasd_rssd_features)); 14428e09f215SStefan Weinhuber 14438e09f215SStefan Weinhuber ccw++; 14448e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RSSD; 14458e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_rssd_features); 14468e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) features; 14478e09f215SStefan Weinhuber 14488e09f215SStefan Weinhuber cqr->buildclk = get_clock(); 14498e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 14508e09f215SStefan Weinhuber rc = dasd_sleep_on(cqr); 14518e09f215SStefan Weinhuber if (rc == 0) { 14528e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 14538e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 14548e09f215SStefan Weinhuber memcpy(&private->features, features, 14558e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)); 145668d1e5f0SStefan Weinhuber } else 145768d1e5f0SStefan Weinhuber dev_warn(&device->cdev->dev, "Reading device feature codes" 145868d1e5f0SStefan Weinhuber " failed with rc=%d\n", rc); 14598e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 14608e09f215SStefan Weinhuber return rc; 14618e09f215SStefan Weinhuber } 14628e09f215SStefan Weinhuber 14638e09f215SStefan Weinhuber 14643d052595SHorst Hummel /* 146540545573SHorst Hummel * Build CP for Perform Subsystem Function - SSC. 146640545573SHorst Hummel */ 1467f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, 1468f3eb5384SStefan Weinhuber int enable_pav) 146940545573SHorst Hummel { 147040545573SHorst Hummel struct dasd_ccw_req *cqr; 147140545573SHorst Hummel struct dasd_psf_ssc_data *psf_ssc_data; 147240545573SHorst Hummel struct ccw1 *ccw; 147340545573SHorst Hummel 147468b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 147540545573SHorst Hummel sizeof(struct dasd_psf_ssc_data), 147640545573SHorst Hummel device); 147740545573SHorst Hummel 147840545573SHorst Hummel if (IS_ERR(cqr)) { 1479fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 148040545573SHorst Hummel "Could not allocate PSF-SSC request"); 148140545573SHorst Hummel return cqr; 148240545573SHorst Hummel } 148340545573SHorst Hummel psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 148440545573SHorst Hummel psf_ssc_data->order = PSF_ORDER_SSC; 1485626350b6SStefan Weinhuber psf_ssc_data->suborder = 0xc0; 1486f3eb5384SStefan Weinhuber if (enable_pav) { 1487626350b6SStefan Weinhuber psf_ssc_data->suborder |= 0x08; 14888e09f215SStefan Weinhuber psf_ssc_data->reserved[0] = 0x88; 1489f3eb5384SStefan Weinhuber } 149040545573SHorst Hummel ccw = cqr->cpaddr; 149140545573SHorst Hummel ccw->cmd_code = DASD_ECKD_CCW_PSF; 149240545573SHorst Hummel ccw->cda = (__u32)(addr_t)psf_ssc_data; 149340545573SHorst Hummel ccw->count = 66; 149440545573SHorst Hummel 14958e09f215SStefan Weinhuber cqr->startdev = device; 14968e09f215SStefan Weinhuber cqr->memdev = device; 14978e09f215SStefan Weinhuber cqr->block = NULL; 1498eb6e199bSStefan Weinhuber cqr->retries = 256; 149940545573SHorst Hummel cqr->expires = 10*HZ; 150040545573SHorst Hummel cqr->buildclk = get_clock(); 150140545573SHorst Hummel cqr->status = DASD_CQR_FILLED; 150240545573SHorst Hummel return cqr; 150340545573SHorst Hummel } 150440545573SHorst Hummel 150540545573SHorst Hummel /* 150640545573SHorst Hummel * Perform Subsystem Function. 150740545573SHorst Hummel * It is necessary to trigger CIO for channel revalidation since this 150840545573SHorst Hummel * call might change behaviour of DASD devices. 150940545573SHorst Hummel */ 151040545573SHorst Hummel static int 1511f3eb5384SStefan Weinhuber dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav) 151240545573SHorst Hummel { 151340545573SHorst Hummel struct dasd_ccw_req *cqr; 151440545573SHorst Hummel int rc; 151540545573SHorst Hummel 1516f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_psf_ssc(device, enable_pav); 151740545573SHorst Hummel if (IS_ERR(cqr)) 151840545573SHorst Hummel return PTR_ERR(cqr); 151940545573SHorst Hummel 152040545573SHorst Hummel rc = dasd_sleep_on(cqr); 152140545573SHorst Hummel if (!rc) 152240545573SHorst Hummel /* trigger CIO to reprobe devices */ 152340545573SHorst Hummel css_schedule_reprobe(); 15248e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 152540545573SHorst Hummel return rc; 152640545573SHorst Hummel } 152740545573SHorst Hummel 152840545573SHorst Hummel /* 152940545573SHorst Hummel * Valide storage server of current device. 153040545573SHorst Hummel */ 1531f4ac1d02SStefan Weinhuber static void dasd_eckd_validate_server(struct dasd_device *device) 153240545573SHorst Hummel { 153340545573SHorst Hummel int rc; 15348e09f215SStefan Weinhuber struct dasd_eckd_private *private; 1535f3eb5384SStefan Weinhuber int enable_pav; 153640545573SHorst Hummel 1537f9f8d02fSStefan Haberland private = (struct dasd_eckd_private *) device->private; 1538f9f8d02fSStefan Haberland if (private->uid.type == UA_BASE_PAV_ALIAS || 1539f9f8d02fSStefan Haberland private->uid.type == UA_HYPER_PAV_ALIAS) 1540f9f8d02fSStefan Haberland return; 154140545573SHorst Hummel if (dasd_nopav || MACHINE_IS_VM) 1542f3eb5384SStefan Weinhuber enable_pav = 0; 1543f3eb5384SStefan Weinhuber else 1544f3eb5384SStefan Weinhuber enable_pav = 1; 1545f3eb5384SStefan Weinhuber rc = dasd_eckd_psf_ssc(device, enable_pav); 1546eb6e199bSStefan Weinhuber 154740545573SHorst Hummel /* may be requested feature is not available on server, 154840545573SHorst Hummel * therefore just report error and go ahead */ 1549b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " 1550b8ed5dd5SStefan Haberland "returned rc=%d", private->uid.ssid, rc); 155140545573SHorst Hummel } 155240545573SHorst Hummel 1553f1633031SStefan Haberland /* 1554f1633031SStefan Haberland * worker to do a validate server in case of a lost pathgroup 1555f1633031SStefan Haberland */ 1556f1633031SStefan Haberland static void dasd_eckd_do_validate_server(struct work_struct *work) 1557f1633031SStefan Haberland { 1558f1633031SStefan Haberland struct dasd_device *device = container_of(work, struct dasd_device, 1559f1633031SStefan Haberland kick_validate); 1560f1633031SStefan Haberland dasd_eckd_validate_server(device); 1561f1633031SStefan Haberland dasd_put_device(device); 1562f1633031SStefan Haberland } 1563f1633031SStefan Haberland 1564f1633031SStefan Haberland static void dasd_eckd_kick_validate_server(struct dasd_device *device) 1565f1633031SStefan Haberland { 1566f1633031SStefan Haberland dasd_get_device(device); 156725e2cf1cSStefan Haberland /* exit if device not online or in offline processing */ 156825e2cf1cSStefan Haberland if (test_bit(DASD_FLAG_OFFLINE, &device->flags) || 156925e2cf1cSStefan Haberland device->state < DASD_STATE_ONLINE) { 157025e2cf1cSStefan Haberland dasd_put_device(device); 157125e2cf1cSStefan Haberland return; 157225e2cf1cSStefan Haberland } 1573f1633031SStefan Haberland /* queue call to do_validate_server to the kernel event daemon. */ 1574f1633031SStefan Haberland schedule_work(&device->kick_validate); 1575f1633031SStefan Haberland } 1576f1633031SStefan Haberland 1577ef19298bSStefan Weinhuber static u32 get_fcx_max_data(struct dasd_device *device) 1578ef19298bSStefan Weinhuber { 1579ef19298bSStefan Weinhuber #if defined(CONFIG_64BIT) 1580ef19298bSStefan Weinhuber int tpm, mdc; 1581ef19298bSStefan Weinhuber int fcx_in_css, fcx_in_gneq, fcx_in_features; 1582ef19298bSStefan Weinhuber struct dasd_eckd_private *private; 1583ef19298bSStefan Weinhuber 1584ef19298bSStefan Weinhuber if (dasd_nofcx) 1585ef19298bSStefan Weinhuber return 0; 1586ef19298bSStefan Weinhuber /* is transport mode supported? */ 1587ef19298bSStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 1588ef19298bSStefan Weinhuber fcx_in_css = css_general_characteristics.fcx; 1589ef19298bSStefan Weinhuber fcx_in_gneq = private->gneq->reserved2[7] & 0x04; 1590ef19298bSStefan Weinhuber fcx_in_features = private->features.feature[40] & 0x80; 1591ef19298bSStefan Weinhuber tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; 1592ef19298bSStefan Weinhuber 1593ef19298bSStefan Weinhuber if (!tpm) 1594ef19298bSStefan Weinhuber return 0; 1595ef19298bSStefan Weinhuber 1596ef19298bSStefan Weinhuber mdc = ccw_device_get_mdc(device->cdev, 0); 1597ef19298bSStefan Weinhuber if (mdc < 0) { 1598ef19298bSStefan Weinhuber dev_warn(&device->cdev->dev, "Detecting the maximum supported" 1599ef19298bSStefan Weinhuber " data size for zHPF requests failed\n"); 1600ef19298bSStefan Weinhuber return 0; 1601ef19298bSStefan Weinhuber } else 1602ef19298bSStefan Weinhuber return mdc * FCX_MAX_DATA_FACTOR; 1603ef19298bSStefan Weinhuber #else 1604ef19298bSStefan Weinhuber return 0; 1605ef19298bSStefan Weinhuber #endif 1606ef19298bSStefan Weinhuber } 1607ef19298bSStefan Weinhuber 160840545573SHorst Hummel /* 16093d052595SHorst Hummel * Check device characteristics. 16103d052595SHorst Hummel * If the device is accessible using ECKD discipline, the device is enabled. 16113d052595SHorst Hummel */ 16121da177e4SLinus Torvalds static int 16131da177e4SLinus Torvalds dasd_eckd_check_characteristics(struct dasd_device *device) 16141da177e4SLinus Torvalds { 16151da177e4SLinus Torvalds struct dasd_eckd_private *private; 16168e09f215SStefan Weinhuber struct dasd_block *block; 16172dedf0d9SStefan Haberland struct dasd_uid temp_uid; 1618f9f8d02fSStefan Haberland int rc, i; 161933b62a30SStefan Weinhuber int readonly; 16207c8faa86SStefan Haberland unsigned long value; 16211da177e4SLinus Torvalds 1622f1633031SStefan Haberland /* setup work queue for validate server*/ 1623f1633031SStefan Haberland INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server); 1624f1633031SStefan Haberland 1625454e1fa1SPeter Oberparleiter if (!ccw_device_is_pathgroup(device->cdev)) { 1626454e1fa1SPeter Oberparleiter dev_warn(&device->cdev->dev, 1627454e1fa1SPeter Oberparleiter "A channel path group could not be established\n"); 1628454e1fa1SPeter Oberparleiter return -EIO; 1629454e1fa1SPeter Oberparleiter } 1630454e1fa1SPeter Oberparleiter if (!ccw_device_is_multipath(device->cdev)) { 1631454e1fa1SPeter Oberparleiter dev_info(&device->cdev->dev, 1632454e1fa1SPeter Oberparleiter "The DASD is not operating in multipath mode\n"); 1633454e1fa1SPeter Oberparleiter } 16341da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 163592636b15SSebastian Ott if (!private) { 163692636b15SSebastian Ott private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); 163792636b15SSebastian Ott if (!private) { 1638fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1639fc19f381SStefan Haberland "Allocating memory for private DASD data " 1640fc19f381SStefan Haberland "failed\n"); 16411da177e4SLinus Torvalds return -ENOMEM; 16421da177e4SLinus Torvalds } 16431da177e4SLinus Torvalds device->private = (void *) private; 164492636b15SSebastian Ott } else { 164592636b15SSebastian Ott memset(private, 0, sizeof(*private)); 16461da177e4SLinus Torvalds } 16471da177e4SLinus Torvalds /* Invalidate status of initial analysis. */ 16481da177e4SLinus Torvalds private->init_cqr_status = -1; 16491da177e4SLinus Torvalds /* Set default cache operations. */ 16501da177e4SLinus Torvalds private->attrib.operation = DASD_NORMAL_CACHE; 16511da177e4SLinus Torvalds private->attrib.nr_cyl = 0; 16521da177e4SLinus Torvalds 165340545573SHorst Hummel /* Read Configuration Data */ 165440545573SHorst Hummel rc = dasd_eckd_read_conf(device); 165540545573SHorst Hummel if (rc) 16568e09f215SStefan Weinhuber goto out_err1; 165740545573SHorst Hummel 16587c8faa86SStefan Haberland /* set default timeout */ 16597c8faa86SStefan Haberland device->default_expires = DASD_EXPIRES; 16607c8faa86SStefan Haberland if (private->gneq) { 16617c8faa86SStefan Haberland value = 1; 16627c8faa86SStefan Haberland for (i = 0; i < private->gneq->timeout.value; i++) 16637c8faa86SStefan Haberland value = 10 * value; 16647c8faa86SStefan Haberland value = value * private->gneq->timeout.number; 16657c8faa86SStefan Haberland /* do not accept useless values */ 16667c8faa86SStefan Haberland if (value != 0 && value <= DASD_EXPIRES_MAX) 16677c8faa86SStefan Haberland device->default_expires = value; 16687c8faa86SStefan Haberland } 16697c8faa86SStefan Haberland 16702dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 16712dedf0d9SStefan Haberland if (temp_uid.type == UA_BASE_DEVICE) { 16728e09f215SStefan Weinhuber block = dasd_alloc_block(); 16738e09f215SStefan Weinhuber if (IS_ERR(block)) { 1674b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1675b8ed5dd5SStefan Haberland "could not allocate dasd " 1676b8ed5dd5SStefan Haberland "block structure"); 16778e09f215SStefan Weinhuber rc = PTR_ERR(block); 16788e09f215SStefan Weinhuber goto out_err1; 16798e09f215SStefan Weinhuber } 16808e09f215SStefan Weinhuber device->block = block; 16818e09f215SStefan Weinhuber block->base = device; 16828e09f215SStefan Weinhuber } 16838e09f215SStefan Weinhuber 1684f9f8d02fSStefan Haberland /* register lcu with alias handling, enable PAV */ 1685f9f8d02fSStefan Haberland rc = dasd_alias_make_device_known_to_lcu(device); 1686f9f8d02fSStefan Haberland if (rc) 16878e09f215SStefan Weinhuber goto out_err2; 1688f9f8d02fSStefan Haberland 1689f4ac1d02SStefan Weinhuber dasd_eckd_validate_server(device); 1690f4ac1d02SStefan Weinhuber 1691f4ac1d02SStefan Weinhuber /* device may report different configuration data after LCU setup */ 1692f4ac1d02SStefan Weinhuber rc = dasd_eckd_read_conf(device); 169340545573SHorst Hummel if (rc) 16948e09f215SStefan Weinhuber goto out_err3; 16958e09f215SStefan Weinhuber 16968e09f215SStefan Weinhuber /* Read Feature Codes */ 169768d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 169840545573SHorst Hummel 16991da177e4SLinus Torvalds /* Read Device Characteristics */ 170068b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 170168b781feSStefan Haberland &private->rdc_data, 64); 17028e09f215SStefan Weinhuber if (rc) { 1703b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1704b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 17058e09f215SStefan Weinhuber goto out_err3; 17068e09f215SStefan Weinhuber } 170734cd551aSStefan Haberland 170834cd551aSStefan Haberland if ((device->features & DASD_FEATURE_USERAW) && 170934cd551aSStefan Haberland !(private->rdc_data.facilities.RT_in_LR)) { 171034cd551aSStefan Haberland dev_err(&device->cdev->dev, "The storage server does not " 171134cd551aSStefan Haberland "support raw-track access\n"); 171234cd551aSStefan Haberland rc = -EINVAL; 171334cd551aSStefan Haberland goto out_err3; 171434cd551aSStefan Haberland } 171534cd551aSStefan Haberland 1716817f2c84SNikanth Karthikesan /* find the valid cylinder size */ 1717b44b0ab3SStefan Weinhuber if (private->rdc_data.no_cyl == LV_COMPAT_CYL && 1718b44b0ab3SStefan Weinhuber private->rdc_data.long_no_cyl) 1719b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.long_no_cyl; 1720b44b0ab3SStefan Weinhuber else 1721b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.no_cyl; 1722b44b0ab3SStefan Weinhuber 1723ef19298bSStefan Weinhuber private->fcx_max_data = get_fcx_max_data(device); 1724ef19298bSStefan Weinhuber 172533b62a30SStefan Weinhuber readonly = dasd_device_is_ro(device); 172633b62a30SStefan Weinhuber if (readonly) 172733b62a30SStefan Weinhuber set_bit(DASD_FLAG_DEVICE_RO, &device->flags); 172833b62a30SStefan Weinhuber 1729fc19f381SStefan Haberland dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " 173033b62a30SStefan Weinhuber "with %d cylinders, %d heads, %d sectors%s\n", 17311da177e4SLinus Torvalds private->rdc_data.dev_type, 17321da177e4SLinus Torvalds private->rdc_data.dev_model, 17331da177e4SLinus Torvalds private->rdc_data.cu_type, 17341da177e4SLinus Torvalds private->rdc_data.cu_model.model, 1735b44b0ab3SStefan Weinhuber private->real_cyl, 17361da177e4SLinus Torvalds private->rdc_data.trk_per_cyl, 173733b62a30SStefan Weinhuber private->rdc_data.sec_per_trk, 173833b62a30SStefan Weinhuber readonly ? ", read-only device" : ""); 17398e09f215SStefan Weinhuber return 0; 17408e09f215SStefan Weinhuber 17418e09f215SStefan Weinhuber out_err3: 17428e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 17438e09f215SStefan Weinhuber out_err2: 17448e09f215SStefan Weinhuber dasd_free_block(device->block); 17458e09f215SStefan Weinhuber device->block = NULL; 17468e09f215SStefan Weinhuber out_err1: 17474abb08c2SStefan Weinhuber kfree(private->conf_data); 17488e09f215SStefan Weinhuber kfree(device->private); 17498e09f215SStefan Weinhuber device->private = NULL; 17503d052595SHorst Hummel return rc; 17511da177e4SLinus Torvalds } 17521da177e4SLinus Torvalds 17538e09f215SStefan Weinhuber static void dasd_eckd_uncheck_device(struct dasd_device *device) 17548e09f215SStefan Weinhuber { 17554abb08c2SStefan Weinhuber struct dasd_eckd_private *private; 17564abb08c2SStefan Weinhuber 17574abb08c2SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 17588e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 17594abb08c2SStefan Weinhuber private->ned = NULL; 17604abb08c2SStefan Weinhuber private->sneq = NULL; 17614abb08c2SStefan Weinhuber private->vdsneq = NULL; 17624abb08c2SStefan Weinhuber private->gneq = NULL; 17634abb08c2SStefan Weinhuber private->conf_len = 0; 17644abb08c2SStefan Weinhuber kfree(private->conf_data); 17654abb08c2SStefan Weinhuber private->conf_data = NULL; 17668e09f215SStefan Weinhuber } 17678e09f215SStefan Weinhuber 17681da177e4SLinus Torvalds static struct dasd_ccw_req * 17691da177e4SLinus Torvalds dasd_eckd_analysis_ccw(struct dasd_device *device) 17701da177e4SLinus Torvalds { 17711da177e4SLinus Torvalds struct dasd_eckd_private *private; 17721da177e4SLinus Torvalds struct eckd_count *count_data; 17731da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 17741da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 17751da177e4SLinus Torvalds struct ccw1 *ccw; 17761da177e4SLinus Torvalds int cplength, datasize; 17771da177e4SLinus Torvalds int i; 17781da177e4SLinus Torvalds 17791da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 17801da177e4SLinus Torvalds 17811da177e4SLinus Torvalds cplength = 8; 17821da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 178368b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 17841da177e4SLinus Torvalds if (IS_ERR(cqr)) 17851da177e4SLinus Torvalds return cqr; 17861da177e4SLinus Torvalds ccw = cqr->cpaddr; 17871da177e4SLinus Torvalds /* Define extent for the first 3 tracks. */ 17881da177e4SLinus Torvalds define_extent(ccw++, cqr->data, 0, 2, 17891da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device); 17901da177e4SLinus Torvalds LO_data = cqr->data + sizeof(struct DE_eckd_data); 17911da177e4SLinus Torvalds /* Locate record for the first 4 records on track 0. */ 17921da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 17931da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 0, 0, 4, 17941da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 17951da177e4SLinus Torvalds 17961da177e4SLinus Torvalds count_data = private->count_area; 17971da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 17981da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 17991da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 18001da177e4SLinus Torvalds ccw->flags = 0; 18011da177e4SLinus Torvalds ccw->count = 8; 18021da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 18031da177e4SLinus Torvalds ccw++; 18041da177e4SLinus Torvalds count_data++; 18051da177e4SLinus Torvalds } 18061da177e4SLinus Torvalds 18071da177e4SLinus Torvalds /* Locate record for the first record on track 2. */ 18081da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18091da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 2, 0, 1, 18101da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 18111da177e4SLinus Torvalds /* Read count ccw. */ 18121da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18131da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 18141da177e4SLinus Torvalds ccw->flags = 0; 18151da177e4SLinus Torvalds ccw->count = 8; 18161da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 18171da177e4SLinus Torvalds 18188e09f215SStefan Weinhuber cqr->block = NULL; 18198e09f215SStefan Weinhuber cqr->startdev = device; 18208e09f215SStefan Weinhuber cqr->memdev = device; 1821eb6e199bSStefan Weinhuber cqr->retries = 255; 18221da177e4SLinus Torvalds cqr->buildclk = get_clock(); 18231da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 18241da177e4SLinus Torvalds return cqr; 18251da177e4SLinus Torvalds } 18261da177e4SLinus Torvalds 1827eb6e199bSStefan Weinhuber /* differentiate between 'no record found' and any other error */ 1828eb6e199bSStefan Weinhuber static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) 1829eb6e199bSStefan Weinhuber { 1830eb6e199bSStefan Weinhuber char *sense; 1831eb6e199bSStefan Weinhuber if (init_cqr->status == DASD_CQR_DONE) 1832eb6e199bSStefan Weinhuber return INIT_CQR_OK; 1833eb6e199bSStefan Weinhuber else if (init_cqr->status == DASD_CQR_NEED_ERP || 1834eb6e199bSStefan Weinhuber init_cqr->status == DASD_CQR_FAILED) { 1835eb6e199bSStefan Weinhuber sense = dasd_get_sense(&init_cqr->irb); 1836eb6e199bSStefan Weinhuber if (sense && (sense[1] & SNS1_NO_REC_FOUND)) 1837eb6e199bSStefan Weinhuber return INIT_CQR_UNFORMATTED; 1838eb6e199bSStefan Weinhuber else 1839eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 1840eb6e199bSStefan Weinhuber } else 1841eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 1842eb6e199bSStefan Weinhuber } 1843eb6e199bSStefan Weinhuber 18441da177e4SLinus Torvalds /* 18451da177e4SLinus Torvalds * This is the callback function for the init_analysis cqr. It saves 18461da177e4SLinus Torvalds * the status of the initial analysis ccw before it frees it and kicks 18471da177e4SLinus Torvalds * the device to continue the startup sequence. This will call 18481da177e4SLinus Torvalds * dasd_eckd_do_analysis again (if the devices has not been marked 18491da177e4SLinus Torvalds * for deletion in the meantime). 18501da177e4SLinus Torvalds */ 1851eb6e199bSStefan Weinhuber static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, 1852eb6e199bSStefan Weinhuber void *data) 18531da177e4SLinus Torvalds { 18541da177e4SLinus Torvalds struct dasd_eckd_private *private; 18551da177e4SLinus Torvalds struct dasd_device *device; 18561da177e4SLinus Torvalds 18578e09f215SStefan Weinhuber device = init_cqr->startdev; 18581da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 1859eb6e199bSStefan Weinhuber private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); 18601da177e4SLinus Torvalds dasd_sfree_request(init_cqr, device); 18611da177e4SLinus Torvalds dasd_kick_device(device); 18621da177e4SLinus Torvalds } 18631da177e4SLinus Torvalds 1864eb6e199bSStefan Weinhuber static int dasd_eckd_start_analysis(struct dasd_block *block) 18651da177e4SLinus Torvalds { 18661da177e4SLinus Torvalds struct dasd_ccw_req *init_cqr; 18671da177e4SLinus Torvalds 18688e09f215SStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(block->base); 18691da177e4SLinus Torvalds if (IS_ERR(init_cqr)) 18701da177e4SLinus Torvalds return PTR_ERR(init_cqr); 18711da177e4SLinus Torvalds init_cqr->callback = dasd_eckd_analysis_callback; 18721da177e4SLinus Torvalds init_cqr->callback_data = NULL; 18731da177e4SLinus Torvalds init_cqr->expires = 5*HZ; 1874eb6e199bSStefan Weinhuber /* first try without ERP, so we can later handle unformatted 1875eb6e199bSStefan Weinhuber * devices as special case 1876eb6e199bSStefan Weinhuber */ 1877eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); 1878eb6e199bSStefan Weinhuber init_cqr->retries = 0; 18791da177e4SLinus Torvalds dasd_add_request_head(init_cqr); 18801da177e4SLinus Torvalds return -EAGAIN; 18811da177e4SLinus Torvalds } 18821da177e4SLinus Torvalds 1883eb6e199bSStefan Weinhuber static int dasd_eckd_end_analysis(struct dasd_block *block) 18841da177e4SLinus Torvalds { 18858e09f215SStefan Weinhuber struct dasd_device *device; 18861da177e4SLinus Torvalds struct dasd_eckd_private *private; 18871da177e4SLinus Torvalds struct eckd_count *count_area; 18881da177e4SLinus Torvalds unsigned int sb, blk_per_trk; 18891da177e4SLinus Torvalds int status, i; 1890eb6e199bSStefan Weinhuber struct dasd_ccw_req *init_cqr; 18911da177e4SLinus Torvalds 18928e09f215SStefan Weinhuber device = block->base; 18931da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 18941da177e4SLinus Torvalds status = private->init_cqr_status; 18951da177e4SLinus Torvalds private->init_cqr_status = -1; 1896eb6e199bSStefan Weinhuber if (status == INIT_CQR_ERROR) { 1897eb6e199bSStefan Weinhuber /* try again, this time with full ERP */ 1898eb6e199bSStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(device); 1899eb6e199bSStefan Weinhuber dasd_sleep_on(init_cqr); 1900eb6e199bSStefan Weinhuber status = dasd_eckd_analysis_evaluation(init_cqr); 1901eb6e199bSStefan Weinhuber dasd_sfree_request(init_cqr, device); 1902eb6e199bSStefan Weinhuber } 1903eb6e199bSStefan Weinhuber 1904e4dbb0f2SStefan Haberland if (device->features & DASD_FEATURE_USERAW) { 1905e4dbb0f2SStefan Haberland block->bp_block = DASD_RAW_BLOCKSIZE; 1906e4dbb0f2SStefan Haberland blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; 1907e4dbb0f2SStefan Haberland block->s2b_shift = 3; 1908e4dbb0f2SStefan Haberland goto raw; 1909e4dbb0f2SStefan Haberland } 1910e4dbb0f2SStefan Haberland 1911eb6e199bSStefan Weinhuber if (status == INIT_CQR_UNFORMATTED) { 1912eb6e199bSStefan Weinhuber dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); 19131da177e4SLinus Torvalds return -EMEDIUMTYPE; 1914eb6e199bSStefan Weinhuber } else if (status == INIT_CQR_ERROR) { 1915eb6e199bSStefan Weinhuber dev_err(&device->cdev->dev, 1916eb6e199bSStefan Weinhuber "Detecting the DASD disk layout failed because " 1917eb6e199bSStefan Weinhuber "of an I/O error\n"); 1918eb6e199bSStefan Weinhuber return -EIO; 19191da177e4SLinus Torvalds } 19201da177e4SLinus Torvalds 19211da177e4SLinus Torvalds private->uses_cdl = 1; 19221da177e4SLinus Torvalds /* Check Track 0 for Compatible Disk Layout */ 19231da177e4SLinus Torvalds count_area = NULL; 19241da177e4SLinus Torvalds for (i = 0; i < 3; i++) { 19251da177e4SLinus Torvalds if (private->count_area[i].kl != 4 || 19261da177e4SLinus Torvalds private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4) { 19271da177e4SLinus Torvalds private->uses_cdl = 0; 19281da177e4SLinus Torvalds break; 19291da177e4SLinus Torvalds } 19301da177e4SLinus Torvalds } 19311da177e4SLinus Torvalds if (i == 3) 19321da177e4SLinus Torvalds count_area = &private->count_area[4]; 19331da177e4SLinus Torvalds 19341da177e4SLinus Torvalds if (private->uses_cdl == 0) { 19351da177e4SLinus Torvalds for (i = 0; i < 5; i++) { 19361da177e4SLinus Torvalds if ((private->count_area[i].kl != 0) || 19371da177e4SLinus Torvalds (private->count_area[i].dl != 19381da177e4SLinus Torvalds private->count_area[0].dl)) 19391da177e4SLinus Torvalds break; 19401da177e4SLinus Torvalds } 19411da177e4SLinus Torvalds if (i == 5) 19421da177e4SLinus Torvalds count_area = &private->count_area[0]; 19431da177e4SLinus Torvalds } else { 19441da177e4SLinus Torvalds if (private->count_area[3].record == 1) 1945fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1946fc19f381SStefan Haberland "Track 0 has no records following the VTOC\n"); 19471da177e4SLinus Torvalds } 1948e4dbb0f2SStefan Haberland 19491da177e4SLinus Torvalds if (count_area != NULL && count_area->kl == 0) { 19501da177e4SLinus Torvalds /* we found notthing violating our disk layout */ 19511da177e4SLinus Torvalds if (dasd_check_blocksize(count_area->dl) == 0) 19528e09f215SStefan Weinhuber block->bp_block = count_area->dl; 19531da177e4SLinus Torvalds } 19548e09f215SStefan Weinhuber if (block->bp_block == 0) { 1955fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1956fc19f381SStefan Haberland "The disk layout of the DASD is not supported\n"); 19571da177e4SLinus Torvalds return -EMEDIUMTYPE; 19581da177e4SLinus Torvalds } 19598e09f215SStefan Weinhuber block->s2b_shift = 0; /* bits to shift 512 to get a block */ 19608e09f215SStefan Weinhuber for (sb = 512; sb < block->bp_block; sb = sb << 1) 19618e09f215SStefan Weinhuber block->s2b_shift++; 19621da177e4SLinus Torvalds 19638e09f215SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 1964e4dbb0f2SStefan Haberland 1965e4dbb0f2SStefan Haberland raw: 1966b44b0ab3SStefan Weinhuber block->blocks = (private->real_cyl * 19671da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 19681da177e4SLinus Torvalds blk_per_trk); 19691da177e4SLinus Torvalds 1970fc19f381SStefan Haberland dev_info(&device->cdev->dev, 1971fc19f381SStefan Haberland "DASD with %d KB/block, %d KB total size, %d KB/track, " 1972fc19f381SStefan Haberland "%s\n", (block->bp_block >> 10), 1973b44b0ab3SStefan Weinhuber ((private->real_cyl * 19741da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 19758e09f215SStefan Weinhuber blk_per_trk * (block->bp_block >> 9)) >> 1), 19768e09f215SStefan Weinhuber ((blk_per_trk * block->bp_block) >> 10), 19771da177e4SLinus Torvalds private->uses_cdl ? 19781da177e4SLinus Torvalds "compatible disk layout" : "linux disk layout"); 19791da177e4SLinus Torvalds 19801da177e4SLinus Torvalds return 0; 19811da177e4SLinus Torvalds } 19821da177e4SLinus Torvalds 19838e09f215SStefan Weinhuber static int dasd_eckd_do_analysis(struct dasd_block *block) 19841da177e4SLinus Torvalds { 19851da177e4SLinus Torvalds struct dasd_eckd_private *private; 19861da177e4SLinus Torvalds 19878e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 19881da177e4SLinus Torvalds if (private->init_cqr_status < 0) 19898e09f215SStefan Weinhuber return dasd_eckd_start_analysis(block); 19901da177e4SLinus Torvalds else 19918e09f215SStefan Weinhuber return dasd_eckd_end_analysis(block); 19921da177e4SLinus Torvalds } 19931da177e4SLinus Torvalds 19948e09f215SStefan Weinhuber static int dasd_eckd_ready_to_online(struct dasd_device *device) 19958e09f215SStefan Weinhuber { 19968e09f215SStefan Weinhuber return dasd_alias_add_device(device); 19978e09f215SStefan Weinhuber }; 19988e09f215SStefan Weinhuber 19998e09f215SStefan Weinhuber static int dasd_eckd_online_to_ready(struct dasd_device *device) 20008e09f215SStefan Weinhuber { 2001501183f2SStefan Haberland cancel_work_sync(&device->reload_device); 200225e2cf1cSStefan Haberland cancel_work_sync(&device->kick_validate); 20038e09f215SStefan Weinhuber return dasd_alias_remove_device(device); 20048e09f215SStefan Weinhuber }; 20058e09f215SStefan Weinhuber 20061da177e4SLinus Torvalds static int 20078e09f215SStefan Weinhuber dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 20081da177e4SLinus Torvalds { 20091da177e4SLinus Torvalds struct dasd_eckd_private *private; 20101da177e4SLinus Torvalds 20118e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 20128e09f215SStefan Weinhuber if (dasd_check_blocksize(block->bp_block) == 0) { 20131da177e4SLinus Torvalds geo->sectors = recs_per_track(&private->rdc_data, 20148e09f215SStefan Weinhuber 0, block->bp_block); 20151da177e4SLinus Torvalds } 20161da177e4SLinus Torvalds geo->cylinders = private->rdc_data.no_cyl; 20171da177e4SLinus Torvalds geo->heads = private->rdc_data.trk_per_cyl; 20181da177e4SLinus Torvalds return 0; 20191da177e4SLinus Torvalds } 20201da177e4SLinus Torvalds 20211da177e4SLinus Torvalds static struct dasd_ccw_req * 20221da177e4SLinus Torvalds dasd_eckd_format_device(struct dasd_device * device, 20231da177e4SLinus Torvalds struct format_data_t * fdata) 20241da177e4SLinus Torvalds { 20251da177e4SLinus Torvalds struct dasd_eckd_private *private; 20261da177e4SLinus Torvalds struct dasd_ccw_req *fcp; 20271da177e4SLinus Torvalds struct eckd_count *ect; 20281da177e4SLinus Torvalds struct ccw1 *ccw; 20291da177e4SLinus Torvalds void *data; 2030b44b0ab3SStefan Weinhuber int rpt; 2031b44b0ab3SStefan Weinhuber struct ch_t address; 20321da177e4SLinus Torvalds int cplength, datasize; 20331da177e4SLinus Torvalds int i; 2034f9a28f7bSJean-Baptiste Joret int intensity = 0; 2035f9a28f7bSJean-Baptiste Joret int r0_perm; 20361da177e4SLinus Torvalds 20371da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 20381da177e4SLinus Torvalds rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize); 2039b44b0ab3SStefan Weinhuber set_ch_t(&address, 2040b44b0ab3SStefan Weinhuber fdata->start_unit / private->rdc_data.trk_per_cyl, 2041b44b0ab3SStefan Weinhuber fdata->start_unit % private->rdc_data.trk_per_cyl); 20421da177e4SLinus Torvalds 20431da177e4SLinus Torvalds /* Sanity checks. */ 20441da177e4SLinus Torvalds if (fdata->start_unit >= 2045b44b0ab3SStefan Weinhuber (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2046fc19f381SStefan Haberland dev_warn(&device->cdev->dev, "Start track number %d used in " 2047fc19f381SStefan Haberland "formatting is too big\n", fdata->start_unit); 20481da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 20491da177e4SLinus Torvalds } 20501da177e4SLinus Torvalds if (fdata->start_unit > fdata->stop_unit) { 2051fc19f381SStefan Haberland dev_warn(&device->cdev->dev, "Start track %d used in " 2052fc19f381SStefan Haberland "formatting exceeds end track\n", fdata->start_unit); 20531da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 20541da177e4SLinus Torvalds } 20551da177e4SLinus Torvalds if (dasd_check_blocksize(fdata->blksize) != 0) { 2056fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 2057fc19f381SStefan Haberland "The DASD cannot be formatted with block size %d\n", 20581da177e4SLinus Torvalds fdata->blksize); 20591da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 20601da177e4SLinus Torvalds } 20611da177e4SLinus Torvalds 20621da177e4SLinus Torvalds /* 20631da177e4SLinus Torvalds * fdata->intensity is a bit string that tells us what to do: 20641da177e4SLinus Torvalds * Bit 0: write record zero 20651da177e4SLinus Torvalds * Bit 1: write home address, currently not supported 20661da177e4SLinus Torvalds * Bit 2: invalidate tracks 20671da177e4SLinus Torvalds * Bit 3: use OS/390 compatible disk layout (cdl) 2068f9a28f7bSJean-Baptiste Joret * Bit 4: do not allow storage subsystem to modify record zero 20691da177e4SLinus Torvalds * Only some bit combinations do make sense. 20701da177e4SLinus Torvalds */ 2071f9a28f7bSJean-Baptiste Joret if (fdata->intensity & 0x10) { 2072f9a28f7bSJean-Baptiste Joret r0_perm = 0; 2073f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity & ~0x10; 2074f9a28f7bSJean-Baptiste Joret } else { 2075f9a28f7bSJean-Baptiste Joret r0_perm = 1; 2076f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity; 2077f9a28f7bSJean-Baptiste Joret } 2078f9a28f7bSJean-Baptiste Joret switch (intensity) { 20791da177e4SLinus Torvalds case 0x00: /* Normal format */ 20801da177e4SLinus Torvalds case 0x08: /* Normal format, use cdl. */ 20811da177e4SLinus Torvalds cplength = 2 + rpt; 20821da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 20831da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 20841da177e4SLinus Torvalds rpt * sizeof(struct eckd_count); 20851da177e4SLinus Torvalds break; 20861da177e4SLinus Torvalds case 0x01: /* Write record zero and format track. */ 20871da177e4SLinus Torvalds case 0x09: /* Write record zero and format track, use cdl. */ 20881da177e4SLinus Torvalds cplength = 3 + rpt; 20891da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 20901da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 20911da177e4SLinus Torvalds sizeof(struct eckd_count) + 20921da177e4SLinus Torvalds rpt * sizeof(struct eckd_count); 20931da177e4SLinus Torvalds break; 20941da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 20951da177e4SLinus Torvalds case 0x0c: /* Invalidate track, use cdl. */ 20961da177e4SLinus Torvalds cplength = 3; 20971da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 20981da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 20991da177e4SLinus Torvalds sizeof(struct eckd_count); 21001da177e4SLinus Torvalds break; 21011da177e4SLinus Torvalds default: 2102fc19f381SStefan Haberland dev_warn(&device->cdev->dev, "An I/O control call used " 2103fc19f381SStefan Haberland "incorrect flags 0x%x\n", fdata->intensity); 21041da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 21051da177e4SLinus Torvalds } 21061da177e4SLinus Torvalds /* Allocate the format ccw request. */ 210768b781feSStefan Haberland fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 21081da177e4SLinus Torvalds if (IS_ERR(fcp)) 21091da177e4SLinus Torvalds return fcp; 21101da177e4SLinus Torvalds 21111da177e4SLinus Torvalds data = fcp->data; 21121da177e4SLinus Torvalds ccw = fcp->cpaddr; 21131da177e4SLinus Torvalds 2114f9a28f7bSJean-Baptiste Joret switch (intensity & ~0x08) { 21151da177e4SLinus Torvalds case 0x00: /* Normal format. */ 21161da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 21171da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 21181da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device); 2119f9a28f7bSJean-Baptiste Joret /* grant subsystem permission to format R0 */ 2120f9a28f7bSJean-Baptiste Joret if (r0_perm) 2121f9a28f7bSJean-Baptiste Joret ((struct DE_eckd_data *)data)->ga_extended |= 0x04; 21221da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 21231da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 21241da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 21251da177e4SLinus Torvalds fdata->start_unit, 0, rpt, 21261da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device, 21271da177e4SLinus Torvalds fdata->blksize); 21281da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 21291da177e4SLinus Torvalds break; 21301da177e4SLinus Torvalds case 0x01: /* Write record zero + format track. */ 21311da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 21321da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 21331da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, 21341da177e4SLinus Torvalds device); 21351da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 21361da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 21371da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 21381da177e4SLinus Torvalds fdata->start_unit, 0, rpt + 1, 21391da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, device, 21408e09f215SStefan Weinhuber device->block->bp_block); 21411da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 21421da177e4SLinus Torvalds break; 21431da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 21441da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 21451da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 21461da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device); 21471da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 21481da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 21491da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 21501da177e4SLinus Torvalds fdata->start_unit, 0, 1, 21511da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device, 8); 21521da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 21531da177e4SLinus Torvalds break; 21541da177e4SLinus Torvalds } 2155f9a28f7bSJean-Baptiste Joret if (intensity & 0x01) { /* write record zero */ 21561da177e4SLinus Torvalds ect = (struct eckd_count *) data; 21571da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2158b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2159b44b0ab3SStefan Weinhuber ect->head = address.head; 21601da177e4SLinus Torvalds ect->record = 0; 21611da177e4SLinus Torvalds ect->kl = 0; 21621da177e4SLinus Torvalds ect->dl = 8; 21631da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 21641da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 21651da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 21661da177e4SLinus Torvalds ccw->count = 8; 21671da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 21681da177e4SLinus Torvalds ccw++; 21691da177e4SLinus Torvalds } 2170f9a28f7bSJean-Baptiste Joret if ((intensity & ~0x08) & 0x04) { /* erase track */ 21711da177e4SLinus Torvalds ect = (struct eckd_count *) data; 21721da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2173b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2174b44b0ab3SStefan Weinhuber ect->head = address.head; 21751da177e4SLinus Torvalds ect->record = 1; 21761da177e4SLinus Torvalds ect->kl = 0; 21771da177e4SLinus Torvalds ect->dl = 0; 21781da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 21791da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 21801da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 21811da177e4SLinus Torvalds ccw->count = 8; 21821da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 21831da177e4SLinus Torvalds } else { /* write remaining records */ 21841da177e4SLinus Torvalds for (i = 0; i < rpt; i++) { 21851da177e4SLinus Torvalds ect = (struct eckd_count *) data; 21861da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2187b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2188b44b0ab3SStefan Weinhuber ect->head = address.head; 21891da177e4SLinus Torvalds ect->record = i + 1; 21901da177e4SLinus Torvalds ect->kl = 0; 21911da177e4SLinus Torvalds ect->dl = fdata->blksize; 21921da177e4SLinus Torvalds /* Check for special tracks 0-1 when formatting CDL */ 2193f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 21941da177e4SLinus Torvalds fdata->start_unit == 0) { 21951da177e4SLinus Torvalds if (i < 3) { 21961da177e4SLinus Torvalds ect->kl = 4; 21971da177e4SLinus Torvalds ect->dl = sizes_trk0[i] - 4; 21981da177e4SLinus Torvalds } 21991da177e4SLinus Torvalds } 2200f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 22011da177e4SLinus Torvalds fdata->start_unit == 1) { 22021da177e4SLinus Torvalds ect->kl = 44; 22031da177e4SLinus Torvalds ect->dl = LABEL_SIZE - 44; 22041da177e4SLinus Torvalds } 22051da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 22061da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 22071da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 22081da177e4SLinus Torvalds ccw->count = 8; 22091da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 22101da177e4SLinus Torvalds ccw++; 22111da177e4SLinus Torvalds } 22121da177e4SLinus Torvalds } 22138e09f215SStefan Weinhuber fcp->startdev = device; 22148e09f215SStefan Weinhuber fcp->memdev = device; 2215eb6e199bSStefan Weinhuber fcp->retries = 256; 22161da177e4SLinus Torvalds fcp->buildclk = get_clock(); 22171da177e4SLinus Torvalds fcp->status = DASD_CQR_FILLED; 22181da177e4SLinus Torvalds return fcp; 22191da177e4SLinus Torvalds } 22201da177e4SLinus Torvalds 22218e09f215SStefan Weinhuber static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 22221da177e4SLinus Torvalds { 22238e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 22248e09f215SStefan Weinhuber if (cqr->block && (cqr->startdev != cqr->block->base)) { 22258e09f215SStefan Weinhuber dasd_eckd_reset_ccw_to_base_io(cqr); 22268e09f215SStefan Weinhuber cqr->startdev = cqr->block->base; 2227a4d26c6aSStefan Weinhuber cqr->lpm = cqr->block->base->path_data.opm; 22281da177e4SLinus Torvalds } 22298e09f215SStefan Weinhuber }; 22301da177e4SLinus Torvalds 22311da177e4SLinus Torvalds static dasd_erp_fn_t 22321da177e4SLinus Torvalds dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 22331da177e4SLinus Torvalds { 22348e09f215SStefan Weinhuber struct dasd_device *device = (struct dasd_device *) cqr->startdev; 22351da177e4SLinus Torvalds struct ccw_device *cdev = device->cdev; 22361da177e4SLinus Torvalds 22371da177e4SLinus Torvalds switch (cdev->id.cu_type) { 22381da177e4SLinus Torvalds case 0x3990: 22391da177e4SLinus Torvalds case 0x2105: 22401da177e4SLinus Torvalds case 0x2107: 22411da177e4SLinus Torvalds case 0x1750: 22421da177e4SLinus Torvalds return dasd_3990_erp_action; 22431da177e4SLinus Torvalds case 0x9343: 22441da177e4SLinus Torvalds case 0x3880: 22451da177e4SLinus Torvalds default: 22461da177e4SLinus Torvalds return dasd_default_erp_action; 22471da177e4SLinus Torvalds } 22481da177e4SLinus Torvalds } 22491da177e4SLinus Torvalds 22501da177e4SLinus Torvalds static dasd_erp_fn_t 22511da177e4SLinus Torvalds dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 22521da177e4SLinus Torvalds { 22531da177e4SLinus Torvalds return dasd_default_erp_postaction; 22541da177e4SLinus Torvalds } 22551da177e4SLinus Torvalds 22565a27e60dSStefan Weinhuber static void dasd_eckd_check_for_device_change(struct dasd_device *device, 22575a27e60dSStefan Weinhuber struct dasd_ccw_req *cqr, 22588e09f215SStefan Weinhuber struct irb *irb) 22598e09f215SStefan Weinhuber { 22608e09f215SStefan Weinhuber char mask; 2261f3eb5384SStefan Weinhuber char *sense = NULL; 2262501183f2SStefan Haberland struct dasd_eckd_private *private; 22638e09f215SStefan Weinhuber 2264501183f2SStefan Haberland private = (struct dasd_eckd_private *) device->private; 22658e09f215SStefan Weinhuber /* first of all check for state change pending interrupt */ 22668e09f215SStefan Weinhuber mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 2267f3eb5384SStefan Weinhuber if ((scsw_dstat(&irb->scsw) & mask) == mask) { 2268c8d1c0ffSStefan Haberland /* 2269c8d1c0ffSStefan Haberland * for alias only, not in offline processing 2270c8d1c0ffSStefan Haberland * and only if not suspended 2271c8d1c0ffSStefan Haberland */ 2272501183f2SStefan Haberland if (!device->block && private->lcu && 227325e2cf1cSStefan Haberland device->state == DASD_STATE_ONLINE && 2274c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_OFFLINE, &device->flags) && 2275c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 2276501183f2SStefan Haberland /* 2277501183f2SStefan Haberland * the state change could be caused by an alias 2278501183f2SStefan Haberland * reassignment remove device from alias handling 2279501183f2SStefan Haberland * to prevent new requests from being scheduled on 2280501183f2SStefan Haberland * the wrong alias device 2281501183f2SStefan Haberland */ 2282501183f2SStefan Haberland dasd_alias_remove_device(device); 2283501183f2SStefan Haberland 2284501183f2SStefan Haberland /* schedule worker to reload device */ 2285501183f2SStefan Haberland dasd_reload_device(device); 2286501183f2SStefan Haberland } 22878e09f215SStefan Weinhuber dasd_generic_handle_state_change(device); 22888e09f215SStefan Weinhuber return; 22898e09f215SStefan Weinhuber } 22908e09f215SStefan Weinhuber 2291a5a0061fSStefan Weinhuber sense = dasd_get_sense(irb); 22925a27e60dSStefan Weinhuber if (!sense) 22935a27e60dSStefan Weinhuber return; 22945a27e60dSStefan Weinhuber 22955a27e60dSStefan Weinhuber /* summary unit check */ 2296c7a29e56SStefan Weinhuber if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) && 2297a5a0061fSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { 22988e09f215SStefan Weinhuber dasd_alias_handle_summary_unit_check(device, irb); 22998e09f215SStefan Weinhuber return; 23008e09f215SStefan Weinhuber } 23018e09f215SStefan Weinhuber 2302f60c768cSStefan Haberland /* service information message SIM */ 23035a27e60dSStefan Weinhuber if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && 2304f3eb5384SStefan Weinhuber ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 2305f3eb5384SStefan Weinhuber dasd_3990_erp_handle_sim(device, sense); 2306f60c768cSStefan Haberland return; 2307f60c768cSStefan Haberland } 2308f60c768cSStefan Haberland 23095a27e60dSStefan Weinhuber /* loss of device reservation is handled via base devices only 23105a27e60dSStefan Weinhuber * as alias devices may be used with several bases 23115a27e60dSStefan Weinhuber */ 2312c7a29e56SStefan Weinhuber if (device->block && (sense[27] & DASD_SENSE_BIT_0) && 2313c7a29e56SStefan Weinhuber (sense[7] == 0x3F) && 23145a27e60dSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && 23155a27e60dSStefan Weinhuber test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { 23165a27e60dSStefan Weinhuber if (device->features & DASD_FEATURE_FAILONSLCK) 23175a27e60dSStefan Weinhuber set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); 23185a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 23195a27e60dSStefan Weinhuber dev_err(&device->cdev->dev, 23205a27e60dSStefan Weinhuber "The device reservation was lost\n"); 2321ada3df91SStefan Haberland } 23225a27e60dSStefan Weinhuber } 2323f3eb5384SStefan Weinhuber 2324f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( 2325f3eb5384SStefan Weinhuber struct dasd_device *startdev, 23268e09f215SStefan Weinhuber struct dasd_block *block, 2327f3eb5384SStefan Weinhuber struct request *req, 2328f3eb5384SStefan Weinhuber sector_t first_rec, 2329f3eb5384SStefan Weinhuber sector_t last_rec, 2330f3eb5384SStefan Weinhuber sector_t first_trk, 2331f3eb5384SStefan Weinhuber sector_t last_trk, 2332f3eb5384SStefan Weinhuber unsigned int first_offs, 2333f3eb5384SStefan Weinhuber unsigned int last_offs, 2334f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 2335f3eb5384SStefan Weinhuber unsigned int blksize) 23361da177e4SLinus Torvalds { 23371da177e4SLinus Torvalds struct dasd_eckd_private *private; 23381da177e4SLinus Torvalds unsigned long *idaws; 23391da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 23401da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 23411da177e4SLinus Torvalds struct ccw1 *ccw; 23425705f702SNeilBrown struct req_iterator iter; 23431da177e4SLinus Torvalds struct bio_vec *bv; 23441da177e4SLinus Torvalds char *dst; 2345f3eb5384SStefan Weinhuber unsigned int off; 23461da177e4SLinus Torvalds int count, cidaw, cplength, datasize; 2347f3eb5384SStefan Weinhuber sector_t recid; 23481da177e4SLinus Torvalds unsigned char cmd, rcmd; 23498e09f215SStefan Weinhuber int use_prefix; 23508e09f215SStefan Weinhuber struct dasd_device *basedev; 23511da177e4SLinus Torvalds 23528e09f215SStefan Weinhuber basedev = block->base; 23538e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 23541da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 23551da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_READ_MT; 23561da177e4SLinus Torvalds else if (rq_data_dir(req) == WRITE) 23571da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_WRITE_MT; 23581da177e4SLinus Torvalds else 23591da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 2360f3eb5384SStefan Weinhuber 23611da177e4SLinus Torvalds /* Check struct bio and count the number of blocks for the request. */ 23621da177e4SLinus Torvalds count = 0; 23631da177e4SLinus Torvalds cidaw = 0; 23645705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 23651da177e4SLinus Torvalds if (bv->bv_len & (blksize - 1)) 23661da177e4SLinus Torvalds /* Eckd can only do full blocks. */ 23671da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 23688e09f215SStefan Weinhuber count += bv->bv_len >> (block->s2b_shift + 9); 2369347a8dc3SMartin Schwidefsky #if defined(CONFIG_64BIT) 23706c92e699SJens Axboe if (idal_is_needed (page_address(bv->bv_page), bv->bv_len)) 23718e09f215SStefan Weinhuber cidaw += bv->bv_len >> (block->s2b_shift + 9); 23721da177e4SLinus Torvalds #endif 23731da177e4SLinus Torvalds } 23741da177e4SLinus Torvalds /* Paranoia. */ 23751da177e4SLinus Torvalds if (count != last_rec - first_rec + 1) 23761da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 23778e09f215SStefan Weinhuber 23788e09f215SStefan Weinhuber /* use the prefix command if available */ 23798e09f215SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 23808e09f215SStefan Weinhuber if (use_prefix) { 23818e09f215SStefan Weinhuber /* 1x prefix + number of blocks */ 23828e09f215SStefan Weinhuber cplength = 2 + count; 23838e09f215SStefan Weinhuber /* 1x prefix + cidaws*sizeof(long) */ 23848e09f215SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 23858e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 23868e09f215SStefan Weinhuber cidaw * sizeof(unsigned long); 23878e09f215SStefan Weinhuber } else { 23881da177e4SLinus Torvalds /* 1x define extent + 1x locate record + number of blocks */ 23891da177e4SLinus Torvalds cplength = 2 + count; 23901da177e4SLinus Torvalds /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 23918e09f215SStefan Weinhuber datasize = sizeof(struct DE_eckd_data) + 23928e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 23931da177e4SLinus Torvalds cidaw * sizeof(unsigned long); 23948e09f215SStefan Weinhuber } 23951da177e4SLinus Torvalds /* Find out the number of additional locate record ccws for cdl. */ 23961da177e4SLinus Torvalds if (private->uses_cdl && first_rec < 2*blk_per_trk) { 23971da177e4SLinus Torvalds if (last_rec >= 2*blk_per_trk) 23981da177e4SLinus Torvalds count = 2*blk_per_trk - first_rec; 23991da177e4SLinus Torvalds cplength += count; 24001da177e4SLinus Torvalds datasize += count*sizeof(struct LO_eckd_data); 24011da177e4SLinus Torvalds } 24021da177e4SLinus Torvalds /* Allocate the ccw request. */ 240368b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 240468b781feSStefan Haberland startdev); 24051da177e4SLinus Torvalds if (IS_ERR(cqr)) 24061da177e4SLinus Torvalds return cqr; 24071da177e4SLinus Torvalds ccw = cqr->cpaddr; 24088e09f215SStefan Weinhuber /* First ccw is define extent or prefix. */ 24098e09f215SStefan Weinhuber if (use_prefix) { 24108e09f215SStefan Weinhuber if (prefix(ccw++, cqr->data, first_trk, 24118e09f215SStefan Weinhuber last_trk, cmd, basedev, startdev) == -EAGAIN) { 24128e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 24138e09f215SStefan Weinhuber * Try again later. 24148e09f215SStefan Weinhuber */ 24158e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2416d54853efSMartin Schwidefsky return ERR_PTR(-EAGAIN); 2417d54853efSMartin Schwidefsky } 24188e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 24198e09f215SStefan Weinhuber sizeof(struct PFX_eckd_data)); 24208e09f215SStefan Weinhuber } else { 24218e09f215SStefan Weinhuber if (define_extent(ccw++, cqr->data, first_trk, 2422b38f27e8SStefan Haberland last_trk, cmd, basedev) == -EAGAIN) { 24238e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 24248e09f215SStefan Weinhuber * Try again later. 24258e09f215SStefan Weinhuber */ 24268e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 24278e09f215SStefan Weinhuber return ERR_PTR(-EAGAIN); 24288e09f215SStefan Weinhuber } 24298e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 24308e09f215SStefan Weinhuber sizeof(struct DE_eckd_data)); 24318e09f215SStefan Weinhuber } 24321da177e4SLinus Torvalds /* Build locate_record+read/write/ccws. */ 24331da177e4SLinus Torvalds LO_data = (struct LO_eckd_data *) (idaws + cidaw); 24341da177e4SLinus Torvalds recid = first_rec; 24351da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 24361da177e4SLinus Torvalds /* Only standard blocks so there is just one locate record. */ 24371da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 24381da177e4SLinus Torvalds locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 24398e09f215SStefan Weinhuber last_rec - recid + 1, cmd, basedev, blksize); 24401da177e4SLinus Torvalds } 24415705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 24421da177e4SLinus Torvalds dst = page_address(bv->bv_page) + bv->bv_offset; 24431da177e4SLinus Torvalds if (dasd_page_cache) { 24441da177e4SLinus Torvalds char *copy = kmem_cache_alloc(dasd_page_cache, 2445441e143eSChristoph Lameter GFP_DMA | __GFP_NOWARN); 24461da177e4SLinus Torvalds if (copy && rq_data_dir(req) == WRITE) 24471da177e4SLinus Torvalds memcpy(copy + bv->bv_offset, dst, bv->bv_len); 24481da177e4SLinus Torvalds if (copy) 24491da177e4SLinus Torvalds dst = copy + bv->bv_offset; 24501da177e4SLinus Torvalds } 24511da177e4SLinus Torvalds for (off = 0; off < bv->bv_len; off += blksize) { 24521da177e4SLinus Torvalds sector_t trkid = recid; 24531da177e4SLinus Torvalds unsigned int recoffs = sector_div(trkid, blk_per_trk); 24541da177e4SLinus Torvalds rcmd = cmd; 24551da177e4SLinus Torvalds count = blksize; 24561da177e4SLinus Torvalds /* Locate record for cdl special block ? */ 24571da177e4SLinus Torvalds if (private->uses_cdl && recid < 2*blk_per_trk) { 24581da177e4SLinus Torvalds if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 24591da177e4SLinus Torvalds rcmd |= 0x8; 24601da177e4SLinus Torvalds count = dasd_eckd_cdl_reclen(recid); 2461ec5883abSHorst Hummel if (count < blksize && 2462ec5883abSHorst Hummel rq_data_dir(req) == READ) 24631da177e4SLinus Torvalds memset(dst + count, 0xe5, 24641da177e4SLinus Torvalds blksize - count); 24651da177e4SLinus Torvalds } 24661da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 24671da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 24681da177e4SLinus Torvalds trkid, recoffs + 1, 24698e09f215SStefan Weinhuber 1, rcmd, basedev, count); 24701da177e4SLinus Torvalds } 24711da177e4SLinus Torvalds /* Locate record for standard blocks ? */ 24721da177e4SLinus Torvalds if (private->uses_cdl && recid == 2*blk_per_trk) { 24731da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 24741da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 24751da177e4SLinus Torvalds trkid, recoffs + 1, 24761da177e4SLinus Torvalds last_rec - recid + 1, 24778e09f215SStefan Weinhuber cmd, basedev, count); 24781da177e4SLinus Torvalds } 24791da177e4SLinus Torvalds /* Read/write ccw. */ 24801da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 24811da177e4SLinus Torvalds ccw->cmd_code = rcmd; 24821da177e4SLinus Torvalds ccw->count = count; 24831da177e4SLinus Torvalds if (idal_is_needed(dst, blksize)) { 24841da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) idaws; 24851da177e4SLinus Torvalds ccw->flags = CCW_FLAG_IDA; 24861da177e4SLinus Torvalds idaws = idal_create_words(idaws, dst, blksize); 24871da177e4SLinus Torvalds } else { 24881da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) dst; 24891da177e4SLinus Torvalds ccw->flags = 0; 24901da177e4SLinus Torvalds } 24911da177e4SLinus Torvalds ccw++; 24921da177e4SLinus Torvalds dst += blksize; 24931da177e4SLinus Torvalds recid++; 24941da177e4SLinus Torvalds } 24951da177e4SLinus Torvalds } 249613de227bSHolger Smolinski if (blk_noretry_request(req) || 249713de227bSHolger Smolinski block->base->features & DASD_FEATURE_FAILFAST) 24981c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 24998e09f215SStefan Weinhuber cqr->startdev = startdev; 25008e09f215SStefan Weinhuber cqr->memdev = startdev; 25018e09f215SStefan Weinhuber cqr->block = block; 25027c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2503a4d26c6aSStefan Weinhuber cqr->lpm = startdev->path_data.ppm; 25041da177e4SLinus Torvalds cqr->retries = 256; 25051da177e4SLinus Torvalds cqr->buildclk = get_clock(); 25061da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 25071da177e4SLinus Torvalds return cqr; 25081da177e4SLinus Torvalds } 25091da177e4SLinus Torvalds 2510f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 2511f3eb5384SStefan Weinhuber struct dasd_device *startdev, 2512f3eb5384SStefan Weinhuber struct dasd_block *block, 2513f3eb5384SStefan Weinhuber struct request *req, 2514f3eb5384SStefan Weinhuber sector_t first_rec, 2515f3eb5384SStefan Weinhuber sector_t last_rec, 2516f3eb5384SStefan Weinhuber sector_t first_trk, 2517f3eb5384SStefan Weinhuber sector_t last_trk, 2518f3eb5384SStefan Weinhuber unsigned int first_offs, 2519f3eb5384SStefan Weinhuber unsigned int last_offs, 2520f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 2521f3eb5384SStefan Weinhuber unsigned int blksize) 2522f3eb5384SStefan Weinhuber { 2523f3eb5384SStefan Weinhuber unsigned long *idaws; 2524f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 2525f3eb5384SStefan Weinhuber struct ccw1 *ccw; 2526f3eb5384SStefan Weinhuber struct req_iterator iter; 2527f3eb5384SStefan Weinhuber struct bio_vec *bv; 2528f3eb5384SStefan Weinhuber char *dst, *idaw_dst; 2529f3eb5384SStefan Weinhuber unsigned int cidaw, cplength, datasize; 2530f3eb5384SStefan Weinhuber unsigned int tlf; 2531f3eb5384SStefan Weinhuber sector_t recid; 2532f3eb5384SStefan Weinhuber unsigned char cmd; 2533f3eb5384SStefan Weinhuber struct dasd_device *basedev; 2534f3eb5384SStefan Weinhuber unsigned int trkcount, count, count_to_trk_end; 2535f3eb5384SStefan Weinhuber unsigned int idaw_len, seg_len, part_len, len_to_track_end; 2536f3eb5384SStefan Weinhuber unsigned char new_track, end_idaw; 2537f3eb5384SStefan Weinhuber sector_t trkid; 2538f3eb5384SStefan Weinhuber unsigned int recoffs; 2539f3eb5384SStefan Weinhuber 2540f3eb5384SStefan Weinhuber basedev = block->base; 2541f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) 2542f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 2543f3eb5384SStefan Weinhuber else if (rq_data_dir(req) == WRITE) 2544f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 2545f3eb5384SStefan Weinhuber else 2546f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 2547f3eb5384SStefan Weinhuber 2548f3eb5384SStefan Weinhuber /* Track based I/O needs IDAWs for each page, and not just for 2549f3eb5384SStefan Weinhuber * 64 bit addresses. We need additional idals for pages 2550f3eb5384SStefan Weinhuber * that get filled from two tracks, so we use the number 2551f3eb5384SStefan Weinhuber * of records as upper limit. 2552f3eb5384SStefan Weinhuber */ 2553f3eb5384SStefan Weinhuber cidaw = last_rec - first_rec + 1; 2554f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 2555f3eb5384SStefan Weinhuber 2556f3eb5384SStefan Weinhuber /* 1x prefix + one read/write ccw per track */ 2557f3eb5384SStefan Weinhuber cplength = 1 + trkcount; 2558f3eb5384SStefan Weinhuber 2559f3eb5384SStefan Weinhuber /* on 31-bit we need space for two 32 bit addresses per page 2560f3eb5384SStefan Weinhuber * on 64-bit one 64 bit address 2561f3eb5384SStefan Weinhuber */ 2562f3eb5384SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 2563f3eb5384SStefan Weinhuber cidaw * sizeof(unsigned long long); 2564f3eb5384SStefan Weinhuber 2565f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 256668b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 256768b781feSStefan Haberland startdev); 2568f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 2569f3eb5384SStefan Weinhuber return cqr; 2570f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 2571f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 2572f3eb5384SStefan Weinhuber if (first_trk == last_trk) 2573f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 2574f3eb5384SStefan Weinhuber else 2575f3eb5384SStefan Weinhuber tlf = last_offs + 1; 2576f3eb5384SStefan Weinhuber tlf *= blksize; 2577f3eb5384SStefan Weinhuber 2578f3eb5384SStefan Weinhuber if (prefix_LRE(ccw++, cqr->data, first_trk, 2579f3eb5384SStefan Weinhuber last_trk, cmd, basedev, startdev, 2580f3eb5384SStefan Weinhuber 1 /* format */, first_offs + 1, 2581f3eb5384SStefan Weinhuber trkcount, blksize, 2582f3eb5384SStefan Weinhuber tlf) == -EAGAIN) { 2583f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 2584f3eb5384SStefan Weinhuber * Try again later. 2585f3eb5384SStefan Weinhuber */ 2586f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2587f3eb5384SStefan Weinhuber return ERR_PTR(-EAGAIN); 2588f3eb5384SStefan Weinhuber } 2589f3eb5384SStefan Weinhuber 2590f3eb5384SStefan Weinhuber /* 2591f3eb5384SStefan Weinhuber * The translation of request into ccw programs must meet the 2592f3eb5384SStefan Weinhuber * following conditions: 2593f3eb5384SStefan Weinhuber * - all idaws but the first and the last must address full pages 2594f3eb5384SStefan Weinhuber * (or 2K blocks on 31-bit) 2595f3eb5384SStefan Weinhuber * - the scope of a ccw and it's idal ends with the track boundaries 2596f3eb5384SStefan Weinhuber */ 2597f3eb5384SStefan Weinhuber idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); 2598f3eb5384SStefan Weinhuber recid = first_rec; 2599f3eb5384SStefan Weinhuber new_track = 1; 2600f3eb5384SStefan Weinhuber end_idaw = 0; 2601f3eb5384SStefan Weinhuber len_to_track_end = 0; 2602246ccea1SMartin Schwidefsky idaw_dst = NULL; 2603f3eb5384SStefan Weinhuber idaw_len = 0; 2604f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 2605f3eb5384SStefan Weinhuber dst = page_address(bv->bv_page) + bv->bv_offset; 2606f3eb5384SStefan Weinhuber seg_len = bv->bv_len; 2607f3eb5384SStefan Weinhuber while (seg_len) { 2608f3eb5384SStefan Weinhuber if (new_track) { 2609f3eb5384SStefan Weinhuber trkid = recid; 2610f3eb5384SStefan Weinhuber recoffs = sector_div(trkid, blk_per_trk); 2611f3eb5384SStefan Weinhuber count_to_trk_end = blk_per_trk - recoffs; 2612f3eb5384SStefan Weinhuber count = min((last_rec - recid + 1), 2613f3eb5384SStefan Weinhuber (sector_t)count_to_trk_end); 2614f3eb5384SStefan Weinhuber len_to_track_end = count * blksize; 2615f3eb5384SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 2616f3eb5384SStefan Weinhuber ccw->cmd_code = cmd; 2617f3eb5384SStefan Weinhuber ccw->count = len_to_track_end; 2618f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 2619f3eb5384SStefan Weinhuber ccw->flags = CCW_FLAG_IDA; 2620f3eb5384SStefan Weinhuber ccw++; 2621f3eb5384SStefan Weinhuber recid += count; 2622f3eb5384SStefan Weinhuber new_track = 0; 262352db45c3SStefan Weinhuber /* first idaw for a ccw may start anywhere */ 262452db45c3SStefan Weinhuber if (!idaw_dst) 262552db45c3SStefan Weinhuber idaw_dst = dst; 2626f3eb5384SStefan Weinhuber } 262752db45c3SStefan Weinhuber /* If we start a new idaw, we must make sure that it 262852db45c3SStefan Weinhuber * starts on an IDA_BLOCK_SIZE boundary. 2629f3eb5384SStefan Weinhuber * If we continue an idaw, we must make sure that the 2630f3eb5384SStefan Weinhuber * current segment begins where the so far accumulated 2631f3eb5384SStefan Weinhuber * idaw ends 2632f3eb5384SStefan Weinhuber */ 263352db45c3SStefan Weinhuber if (!idaw_dst) { 263452db45c3SStefan Weinhuber if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { 263552db45c3SStefan Weinhuber dasd_sfree_request(cqr, startdev); 263652db45c3SStefan Weinhuber return ERR_PTR(-ERANGE); 263752db45c3SStefan Weinhuber } else 2638f3eb5384SStefan Weinhuber idaw_dst = dst; 263952db45c3SStefan Weinhuber } 2640f3eb5384SStefan Weinhuber if ((idaw_dst + idaw_len) != dst) { 2641f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2642f3eb5384SStefan Weinhuber return ERR_PTR(-ERANGE); 2643f3eb5384SStefan Weinhuber } 2644f3eb5384SStefan Weinhuber part_len = min(seg_len, len_to_track_end); 2645f3eb5384SStefan Weinhuber seg_len -= part_len; 2646f3eb5384SStefan Weinhuber dst += part_len; 2647f3eb5384SStefan Weinhuber idaw_len += part_len; 2648f3eb5384SStefan Weinhuber len_to_track_end -= part_len; 2649f3eb5384SStefan Weinhuber /* collected memory area ends on an IDA_BLOCK border, 2650f3eb5384SStefan Weinhuber * -> create an idaw 2651f3eb5384SStefan Weinhuber * idal_create_words will handle cases where idaw_len 2652f3eb5384SStefan Weinhuber * is larger then IDA_BLOCK_SIZE 2653f3eb5384SStefan Weinhuber */ 2654f3eb5384SStefan Weinhuber if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) 2655f3eb5384SStefan Weinhuber end_idaw = 1; 2656f3eb5384SStefan Weinhuber /* We also need to end the idaw at track end */ 2657f3eb5384SStefan Weinhuber if (!len_to_track_end) { 2658f3eb5384SStefan Weinhuber new_track = 1; 2659f3eb5384SStefan Weinhuber end_idaw = 1; 2660f3eb5384SStefan Weinhuber } 2661f3eb5384SStefan Weinhuber if (end_idaw) { 2662f3eb5384SStefan Weinhuber idaws = idal_create_words(idaws, idaw_dst, 2663f3eb5384SStefan Weinhuber idaw_len); 2664246ccea1SMartin Schwidefsky idaw_dst = NULL; 2665f3eb5384SStefan Weinhuber idaw_len = 0; 2666f3eb5384SStefan Weinhuber end_idaw = 0; 2667f3eb5384SStefan Weinhuber } 2668f3eb5384SStefan Weinhuber } 2669f3eb5384SStefan Weinhuber } 2670f3eb5384SStefan Weinhuber 2671f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 2672f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 2673f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2674f3eb5384SStefan Weinhuber cqr->startdev = startdev; 2675f3eb5384SStefan Weinhuber cqr->memdev = startdev; 2676f3eb5384SStefan Weinhuber cqr->block = block; 26777c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2678a4d26c6aSStefan Weinhuber cqr->lpm = startdev->path_data.ppm; 2679f3eb5384SStefan Weinhuber cqr->retries = 256; 2680f3eb5384SStefan Weinhuber cqr->buildclk = get_clock(); 2681f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 2682f3eb5384SStefan Weinhuber return cqr; 2683f3eb5384SStefan Weinhuber } 2684f3eb5384SStefan Weinhuber 2685f3eb5384SStefan Weinhuber static int prepare_itcw(struct itcw *itcw, 2686f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 2687f3eb5384SStefan Weinhuber struct dasd_device *basedev, 2688f3eb5384SStefan Weinhuber struct dasd_device *startdev, 2689f3eb5384SStefan Weinhuber unsigned int rec_on_trk, int count, 2690f3eb5384SStefan Weinhuber unsigned int blksize, 2691f3eb5384SStefan Weinhuber unsigned int total_data_size, 2692f3eb5384SStefan Weinhuber unsigned int tlf, 2693f3eb5384SStefan Weinhuber unsigned int blk_per_trk) 2694f3eb5384SStefan Weinhuber { 2695f3eb5384SStefan Weinhuber struct PFX_eckd_data pfxdata; 2696f3eb5384SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 2697f3eb5384SStefan Weinhuber struct DE_eckd_data *dedata; 2698f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 2699f3eb5384SStefan Weinhuber struct dcw *dcw; 2700f3eb5384SStefan Weinhuber 2701f3eb5384SStefan Weinhuber u32 begcyl, endcyl; 2702f3eb5384SStefan Weinhuber u16 heads, beghead, endhead; 2703f3eb5384SStefan Weinhuber u8 pfx_cmd; 2704f3eb5384SStefan Weinhuber 2705f3eb5384SStefan Weinhuber int rc = 0; 2706f3eb5384SStefan Weinhuber int sector = 0; 2707f3eb5384SStefan Weinhuber int dn, d; 2708f3eb5384SStefan Weinhuber 2709f3eb5384SStefan Weinhuber 2710f3eb5384SStefan Weinhuber /* setup prefix data */ 2711f3eb5384SStefan Weinhuber basepriv = (struct dasd_eckd_private *) basedev->private; 2712f3eb5384SStefan Weinhuber startpriv = (struct dasd_eckd_private *) startdev->private; 2713f3eb5384SStefan Weinhuber dedata = &pfxdata.define_extent; 2714f3eb5384SStefan Weinhuber lredata = &pfxdata.locate_record; 2715f3eb5384SStefan Weinhuber 2716f3eb5384SStefan Weinhuber memset(&pfxdata, 0, sizeof(pfxdata)); 2717f3eb5384SStefan Weinhuber pfxdata.format = 1; /* PFX with LRE */ 2718f3eb5384SStefan Weinhuber pfxdata.base_address = basepriv->ned->unit_addr; 2719f3eb5384SStefan Weinhuber pfxdata.base_lss = basepriv->ned->ID; 2720f3eb5384SStefan Weinhuber pfxdata.validity.define_extent = 1; 2721f3eb5384SStefan Weinhuber 2722f3eb5384SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 2723f3eb5384SStefan Weinhuber if (startpriv->uid.type != UA_BASE_DEVICE) { 2724f3eb5384SStefan Weinhuber pfxdata.validity.verify_base = 1; 2725f3eb5384SStefan Weinhuber if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 2726f3eb5384SStefan Weinhuber pfxdata.validity.hyper_pav = 1; 2727f3eb5384SStefan Weinhuber } 2728f3eb5384SStefan Weinhuber 2729f3eb5384SStefan Weinhuber switch (cmd) { 2730f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 2731f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 2732f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 2733f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 2734f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 2735f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 2736f3eb5384SStefan Weinhuber lredata->operation.operation = 0x0C; 2737f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x01; 2738f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX_READ; 2739f3eb5384SStefan Weinhuber break; 2740f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 2741f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 2742f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 2743f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 2744f3eb5384SStefan Weinhuber rc = check_XRC_on_prefix(&pfxdata, basedev); 2745f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 2746f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 2747f3eb5384SStefan Weinhuber lredata->operation.operation = 0x3F; 2748f3eb5384SStefan Weinhuber lredata->extended_operation = 0x23; 2749f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x2; 2750f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX; 2751f3eb5384SStefan Weinhuber break; 2752f3eb5384SStefan Weinhuber default: 2753f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 2754f3eb5384SStefan Weinhuber "prepare itcw, unknown opcode 0x%x", cmd); 2755f3eb5384SStefan Weinhuber BUG(); 2756f3eb5384SStefan Weinhuber break; 2757f3eb5384SStefan Weinhuber } 2758f3eb5384SStefan Weinhuber if (rc) 2759f3eb5384SStefan Weinhuber return rc; 2760f3eb5384SStefan Weinhuber 2761f3eb5384SStefan Weinhuber dedata->attributes.mode = 0x3; /* ECKD */ 2762f3eb5384SStefan Weinhuber 2763f3eb5384SStefan Weinhuber heads = basepriv->rdc_data.trk_per_cyl; 2764f3eb5384SStefan Weinhuber begcyl = trk / heads; 2765f3eb5384SStefan Weinhuber beghead = trk % heads; 2766f3eb5384SStefan Weinhuber endcyl = totrk / heads; 2767f3eb5384SStefan Weinhuber endhead = totrk % heads; 2768f3eb5384SStefan Weinhuber 2769f3eb5384SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 2770f3eb5384SStefan Weinhuber if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 2771f3eb5384SStefan Weinhuber dedata->attributes.operation == DASD_SEQ_ACCESS) { 2772f3eb5384SStefan Weinhuber 2773f3eb5384SStefan Weinhuber if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 2774f3eb5384SStefan Weinhuber endcyl += basepriv->attrib.nr_cyl; 2775f3eb5384SStefan Weinhuber else 2776f3eb5384SStefan Weinhuber endcyl = (basepriv->real_cyl - 1); 2777f3eb5384SStefan Weinhuber } 2778f3eb5384SStefan Weinhuber 2779f3eb5384SStefan Weinhuber set_ch_t(&dedata->beg_ext, begcyl, beghead); 2780f3eb5384SStefan Weinhuber set_ch_t(&dedata->end_ext, endcyl, endhead); 2781f3eb5384SStefan Weinhuber 2782f3eb5384SStefan Weinhuber dedata->ep_format = 0x20; /* records per track is valid */ 2783f3eb5384SStefan Weinhuber dedata->ep_rec_per_track = blk_per_trk; 2784f3eb5384SStefan Weinhuber 2785f3eb5384SStefan Weinhuber if (rec_on_trk) { 2786f3eb5384SStefan Weinhuber switch (basepriv->rdc_data.dev_type) { 2787f3eb5384SStefan Weinhuber case 0x3390: 2788f3eb5384SStefan Weinhuber dn = ceil_quot(blksize + 6, 232); 2789f3eb5384SStefan Weinhuber d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); 2790f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 2791f3eb5384SStefan Weinhuber break; 2792f3eb5384SStefan Weinhuber case 0x3380: 2793f3eb5384SStefan Weinhuber d = 7 + ceil_quot(blksize + 12, 32); 2794f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 2795f3eb5384SStefan Weinhuber break; 2796f3eb5384SStefan Weinhuber } 2797f3eb5384SStefan Weinhuber } 2798f3eb5384SStefan Weinhuber 2799f3eb5384SStefan Weinhuber lredata->auxiliary.length_valid = 1; 2800f3eb5384SStefan Weinhuber lredata->auxiliary.length_scope = 1; 2801f3eb5384SStefan Weinhuber lredata->auxiliary.imbedded_ccw_valid = 1; 2802f3eb5384SStefan Weinhuber lredata->length = tlf; 2803f3eb5384SStefan Weinhuber lredata->imbedded_ccw = cmd; 2804f3eb5384SStefan Weinhuber lredata->count = count; 2805f3eb5384SStefan Weinhuber lredata->sector = sector; 2806f3eb5384SStefan Weinhuber set_ch_t(&lredata->seek_addr, begcyl, beghead); 2807f3eb5384SStefan Weinhuber lredata->search_arg.cyl = lredata->seek_addr.cyl; 2808f3eb5384SStefan Weinhuber lredata->search_arg.head = lredata->seek_addr.head; 2809f3eb5384SStefan Weinhuber lredata->search_arg.record = rec_on_trk; 2810f3eb5384SStefan Weinhuber 2811f3eb5384SStefan Weinhuber dcw = itcw_add_dcw(itcw, pfx_cmd, 0, 2812f3eb5384SStefan Weinhuber &pfxdata, sizeof(pfxdata), total_data_size); 2813364c18d8SHeiko Carstens return IS_ERR(dcw) ? PTR_ERR(dcw) : 0; 2814f3eb5384SStefan Weinhuber } 2815f3eb5384SStefan Weinhuber 2816f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 2817f3eb5384SStefan Weinhuber struct dasd_device *startdev, 2818f3eb5384SStefan Weinhuber struct dasd_block *block, 2819f3eb5384SStefan Weinhuber struct request *req, 2820f3eb5384SStefan Weinhuber sector_t first_rec, 2821f3eb5384SStefan Weinhuber sector_t last_rec, 2822f3eb5384SStefan Weinhuber sector_t first_trk, 2823f3eb5384SStefan Weinhuber sector_t last_trk, 2824f3eb5384SStefan Weinhuber unsigned int first_offs, 2825f3eb5384SStefan Weinhuber unsigned int last_offs, 2826f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 2827f3eb5384SStefan Weinhuber unsigned int blksize) 2828f3eb5384SStefan Weinhuber { 2829f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 2830f3eb5384SStefan Weinhuber struct req_iterator iter; 2831f3eb5384SStefan Weinhuber struct bio_vec *bv; 2832f3eb5384SStefan Weinhuber char *dst; 2833f3eb5384SStefan Weinhuber unsigned int trkcount, ctidaw; 2834f3eb5384SStefan Weinhuber unsigned char cmd; 2835f3eb5384SStefan Weinhuber struct dasd_device *basedev; 2836f3eb5384SStefan Weinhuber unsigned int tlf; 2837f3eb5384SStefan Weinhuber struct itcw *itcw; 2838f3eb5384SStefan Weinhuber struct tidaw *last_tidaw = NULL; 2839f3eb5384SStefan Weinhuber int itcw_op; 2840f3eb5384SStefan Weinhuber size_t itcw_size; 2841ef19298bSStefan Weinhuber u8 tidaw_flags; 2842ef19298bSStefan Weinhuber unsigned int seg_len, part_len, len_to_track_end; 2843ef19298bSStefan Weinhuber unsigned char new_track; 2844ef19298bSStefan Weinhuber sector_t recid, trkid; 2845ef19298bSStefan Weinhuber unsigned int offs; 2846ef19298bSStefan Weinhuber unsigned int count, count_to_trk_end; 2847cd10502bSJulia Lawall int ret; 2848f3eb5384SStefan Weinhuber 2849f3eb5384SStefan Weinhuber basedev = block->base; 2850f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) { 2851f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 2852f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_READ; 2853f3eb5384SStefan Weinhuber } else if (rq_data_dir(req) == WRITE) { 2854f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 2855f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_WRITE; 2856f3eb5384SStefan Weinhuber } else 2857f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 2858f3eb5384SStefan Weinhuber 2859f3eb5384SStefan Weinhuber /* trackbased I/O needs address all memory via TIDAWs, 2860f3eb5384SStefan Weinhuber * not just for 64 bit addresses. This allows us to map 2861f3eb5384SStefan Weinhuber * each segment directly to one tidaw. 2862ef19298bSStefan Weinhuber * In the case of write requests, additional tidaws may 2863ef19298bSStefan Weinhuber * be needed when a segment crosses a track boundary. 2864f3eb5384SStefan Weinhuber */ 2865f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 2866f3eb5384SStefan Weinhuber ctidaw = 0; 2867f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 2868f3eb5384SStefan Weinhuber ++ctidaw; 2869f3eb5384SStefan Weinhuber } 2870ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 2871ef19298bSStefan Weinhuber ctidaw += (last_trk - first_trk); 2872f3eb5384SStefan Weinhuber 2873f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 2874f3eb5384SStefan Weinhuber itcw_size = itcw_calc_size(0, ctidaw, 0); 287568b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 2876f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 2877f3eb5384SStefan Weinhuber return cqr; 2878f3eb5384SStefan Weinhuber 2879f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 2880f3eb5384SStefan Weinhuber if (first_trk == last_trk) 2881f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 2882f3eb5384SStefan Weinhuber else 2883f3eb5384SStefan Weinhuber tlf = last_offs + 1; 2884f3eb5384SStefan Weinhuber tlf *= blksize; 2885f3eb5384SStefan Weinhuber 2886f3eb5384SStefan Weinhuber itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); 2887ef19298bSStefan Weinhuber if (IS_ERR(itcw)) { 2888cd10502bSJulia Lawall ret = -EINVAL; 2889cd10502bSJulia Lawall goto out_error; 2890ef19298bSStefan Weinhuber } 2891f3eb5384SStefan Weinhuber cqr->cpaddr = itcw_get_tcw(itcw); 2892f3eb5384SStefan Weinhuber if (prepare_itcw(itcw, first_trk, last_trk, 2893f3eb5384SStefan Weinhuber cmd, basedev, startdev, 2894f3eb5384SStefan Weinhuber first_offs + 1, 2895f3eb5384SStefan Weinhuber trkcount, blksize, 2896f3eb5384SStefan Weinhuber (last_rec - first_rec + 1) * blksize, 2897f3eb5384SStefan Weinhuber tlf, blk_per_trk) == -EAGAIN) { 2898f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 2899f3eb5384SStefan Weinhuber * Try again later. 2900f3eb5384SStefan Weinhuber */ 2901cd10502bSJulia Lawall ret = -EAGAIN; 2902cd10502bSJulia Lawall goto out_error; 2903f3eb5384SStefan Weinhuber } 2904d54cddb6SHeiko Carstens len_to_track_end = 0; 2905f3eb5384SStefan Weinhuber /* 2906f3eb5384SStefan Weinhuber * A tidaw can address 4k of memory, but must not cross page boundaries 2907f3eb5384SStefan Weinhuber * We can let the block layer handle this by setting 2908f3eb5384SStefan Weinhuber * blk_queue_segment_boundary to page boundaries and 2909f3eb5384SStefan Weinhuber * blk_max_segment_size to page size when setting up the request queue. 2910ef19298bSStefan Weinhuber * For write requests, a TIDAW must not cross track boundaries, because 2911ef19298bSStefan Weinhuber * we have to set the CBC flag on the last tidaw for each track. 2912f3eb5384SStefan Weinhuber */ 2913ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) { 2914ef19298bSStefan Weinhuber new_track = 1; 2915ef19298bSStefan Weinhuber recid = first_rec; 2916f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 2917f3eb5384SStefan Weinhuber dst = page_address(bv->bv_page) + bv->bv_offset; 2918ef19298bSStefan Weinhuber seg_len = bv->bv_len; 2919ef19298bSStefan Weinhuber while (seg_len) { 2920ef19298bSStefan Weinhuber if (new_track) { 2921ef19298bSStefan Weinhuber trkid = recid; 2922ef19298bSStefan Weinhuber offs = sector_div(trkid, blk_per_trk); 2923ef19298bSStefan Weinhuber count_to_trk_end = blk_per_trk - offs; 2924ef19298bSStefan Weinhuber count = min((last_rec - recid + 1), 2925ef19298bSStefan Weinhuber (sector_t)count_to_trk_end); 2926ef19298bSStefan Weinhuber len_to_track_end = count * blksize; 2927ef19298bSStefan Weinhuber recid += count; 2928ef19298bSStefan Weinhuber new_track = 0; 2929f3eb5384SStefan Weinhuber } 2930ef19298bSStefan Weinhuber part_len = min(seg_len, len_to_track_end); 2931ef19298bSStefan Weinhuber seg_len -= part_len; 2932ef19298bSStefan Weinhuber len_to_track_end -= part_len; 2933ef19298bSStefan Weinhuber /* We need to end the tidaw at track end */ 2934ef19298bSStefan Weinhuber if (!len_to_track_end) { 2935ef19298bSStefan Weinhuber new_track = 1; 2936ef19298bSStefan Weinhuber tidaw_flags = TIDAW_FLAGS_INSERT_CBC; 2937ef19298bSStefan Weinhuber } else 2938ef19298bSStefan Weinhuber tidaw_flags = 0; 2939ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, 2940ef19298bSStefan Weinhuber dst, part_len); 2941cd10502bSJulia Lawall if (IS_ERR(last_tidaw)) { 2942cd10502bSJulia Lawall ret = -EINVAL; 2943cd10502bSJulia Lawall goto out_error; 2944cd10502bSJulia Lawall } 2945ef19298bSStefan Weinhuber dst += part_len; 2946ef19298bSStefan Weinhuber } 2947ef19298bSStefan Weinhuber } 2948ef19298bSStefan Weinhuber } else { 2949ef19298bSStefan Weinhuber rq_for_each_segment(bv, req, iter) { 2950ef19298bSStefan Weinhuber dst = page_address(bv->bv_page) + bv->bv_offset; 2951ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, 0x00, 2952ef19298bSStefan Weinhuber dst, bv->bv_len); 2953cd10502bSJulia Lawall if (IS_ERR(last_tidaw)) { 2954cd10502bSJulia Lawall ret = -EINVAL; 2955cd10502bSJulia Lawall goto out_error; 2956cd10502bSJulia Lawall } 2957ef19298bSStefan Weinhuber } 2958ef19298bSStefan Weinhuber } 2959ef19298bSStefan Weinhuber last_tidaw->flags |= TIDAW_FLAGS_LAST; 2960ef19298bSStefan Weinhuber last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; 2961f3eb5384SStefan Weinhuber itcw_finalize(itcw); 2962f3eb5384SStefan Weinhuber 2963f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 2964f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 2965f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2966ef19298bSStefan Weinhuber cqr->cpmode = 1; 2967f3eb5384SStefan Weinhuber cqr->startdev = startdev; 2968f3eb5384SStefan Weinhuber cqr->memdev = startdev; 2969f3eb5384SStefan Weinhuber cqr->block = block; 29707c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2971a4d26c6aSStefan Weinhuber cqr->lpm = startdev->path_data.ppm; 2972f3eb5384SStefan Weinhuber cqr->retries = 256; 2973f3eb5384SStefan Weinhuber cqr->buildclk = get_clock(); 2974f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 2975f3eb5384SStefan Weinhuber return cqr; 2976cd10502bSJulia Lawall out_error: 2977cd10502bSJulia Lawall dasd_sfree_request(cqr, startdev); 2978cd10502bSJulia Lawall return ERR_PTR(ret); 2979f3eb5384SStefan Weinhuber } 2980f3eb5384SStefan Weinhuber 2981f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 2982f3eb5384SStefan Weinhuber struct dasd_block *block, 2983f3eb5384SStefan Weinhuber struct request *req) 2984f3eb5384SStefan Weinhuber { 2985ef19298bSStefan Weinhuber int cmdrtd, cmdwtd; 2986f3eb5384SStefan Weinhuber int use_prefix; 2987ef19298bSStefan Weinhuber int fcx_multitrack; 298845b44d76SStefan Weinhuber struct dasd_eckd_private *private; 2989f3eb5384SStefan Weinhuber struct dasd_device *basedev; 2990f3eb5384SStefan Weinhuber sector_t first_rec, last_rec; 2991f3eb5384SStefan Weinhuber sector_t first_trk, last_trk; 2992f3eb5384SStefan Weinhuber unsigned int first_offs, last_offs; 2993f3eb5384SStefan Weinhuber unsigned int blk_per_trk, blksize; 2994f3eb5384SStefan Weinhuber int cdlspecial; 2995ef19298bSStefan Weinhuber unsigned int data_size; 2996f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 2997f3eb5384SStefan Weinhuber 2998f3eb5384SStefan Weinhuber basedev = block->base; 2999f3eb5384SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 3000f3eb5384SStefan Weinhuber 3001f3eb5384SStefan Weinhuber /* Calculate number of blocks/records per track. */ 3002f3eb5384SStefan Weinhuber blksize = block->bp_block; 3003f3eb5384SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 30046fca97a9SStefan Haberland if (blk_per_trk == 0) 30056fca97a9SStefan Haberland return ERR_PTR(-EINVAL); 3006f3eb5384SStefan Weinhuber /* Calculate record id of first and last block. */ 300783096ebfSTejun Heo first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; 3008f3eb5384SStefan Weinhuber first_offs = sector_div(first_trk, blk_per_trk); 3009f3eb5384SStefan Weinhuber last_rec = last_trk = 301083096ebfSTejun Heo (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 3011f3eb5384SStefan Weinhuber last_offs = sector_div(last_trk, blk_per_trk); 3012f3eb5384SStefan Weinhuber cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); 3013f3eb5384SStefan Weinhuber 3014ef19298bSStefan Weinhuber fcx_multitrack = private->features.feature[40] & 0x20; 3015ef19298bSStefan Weinhuber data_size = blk_rq_bytes(req); 3016ef19298bSStefan Weinhuber /* tpm write request add CBC data on each track boundary */ 3017ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 3018ef19298bSStefan Weinhuber data_size += (last_trk - first_trk) * 4; 3019f3eb5384SStefan Weinhuber 3020f3eb5384SStefan Weinhuber /* is read track data and write track data in command mode supported? */ 3021f3eb5384SStefan Weinhuber cmdrtd = private->features.feature[9] & 0x20; 3022f3eb5384SStefan Weinhuber cmdwtd = private->features.feature[12] & 0x40; 3023f3eb5384SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 3024f3eb5384SStefan Weinhuber 3025f3eb5384SStefan Weinhuber cqr = NULL; 3026f3eb5384SStefan Weinhuber if (cdlspecial || dasd_page_cache) { 3027f3eb5384SStefan Weinhuber /* do nothing, just fall through to the cmd mode single case */ 3028ef19298bSStefan Weinhuber } else if ((data_size <= private->fcx_max_data) 3029ef19298bSStefan Weinhuber && (fcx_multitrack || (first_trk == last_trk))) { 3030f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, 3031f3eb5384SStefan Weinhuber first_rec, last_rec, 3032f3eb5384SStefan Weinhuber first_trk, last_trk, 3033f3eb5384SStefan Weinhuber first_offs, last_offs, 3034f3eb5384SStefan Weinhuber blk_per_trk, blksize); 3035ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3036ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 3037f3eb5384SStefan Weinhuber cqr = NULL; 3038f3eb5384SStefan Weinhuber } else if (use_prefix && 3039f3eb5384SStefan Weinhuber (((rq_data_dir(req) == READ) && cmdrtd) || 3040f3eb5384SStefan Weinhuber ((rq_data_dir(req) == WRITE) && cmdwtd))) { 3041f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, 3042f3eb5384SStefan Weinhuber first_rec, last_rec, 3043f3eb5384SStefan Weinhuber first_trk, last_trk, 3044f3eb5384SStefan Weinhuber first_offs, last_offs, 3045f3eb5384SStefan Weinhuber blk_per_trk, blksize); 3046ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3047ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 3048f3eb5384SStefan Weinhuber cqr = NULL; 3049f3eb5384SStefan Weinhuber } 3050f3eb5384SStefan Weinhuber if (!cqr) 3051f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, 3052f3eb5384SStefan Weinhuber first_rec, last_rec, 3053f3eb5384SStefan Weinhuber first_trk, last_trk, 3054f3eb5384SStefan Weinhuber first_offs, last_offs, 3055f3eb5384SStefan Weinhuber blk_per_trk, blksize); 3056f3eb5384SStefan Weinhuber return cqr; 3057f3eb5384SStefan Weinhuber } 3058f3eb5384SStefan Weinhuber 3059e4dbb0f2SStefan Haberland static struct dasd_ccw_req *dasd_raw_build_cp(struct dasd_device *startdev, 3060e4dbb0f2SStefan Haberland struct dasd_block *block, 3061e4dbb0f2SStefan Haberland struct request *req) 3062e4dbb0f2SStefan Haberland { 3063e4dbb0f2SStefan Haberland unsigned long *idaws; 3064e4dbb0f2SStefan Haberland struct dasd_device *basedev; 3065e4dbb0f2SStefan Haberland struct dasd_ccw_req *cqr; 3066e4dbb0f2SStefan Haberland struct ccw1 *ccw; 3067e4dbb0f2SStefan Haberland struct req_iterator iter; 3068e4dbb0f2SStefan Haberland struct bio_vec *bv; 3069e4dbb0f2SStefan Haberland char *dst; 3070e4dbb0f2SStefan Haberland unsigned char cmd; 3071e4dbb0f2SStefan Haberland unsigned int trkcount; 3072e4dbb0f2SStefan Haberland unsigned int seg_len, len_to_track_end; 3073e4dbb0f2SStefan Haberland unsigned int first_offs; 3074e4dbb0f2SStefan Haberland unsigned int cidaw, cplength, datasize; 3075e4dbb0f2SStefan Haberland sector_t first_trk, last_trk; 3076e4dbb0f2SStefan Haberland unsigned int pfx_datasize; 3077e4dbb0f2SStefan Haberland 3078e4dbb0f2SStefan Haberland /* 3079e4dbb0f2SStefan Haberland * raw track access needs to be mutiple of 64k and on 64k boundary 3080e4dbb0f2SStefan Haberland */ 3081e4dbb0f2SStefan Haberland if ((blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK) != 0) { 3082e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EINVAL); 3083e4dbb0f2SStefan Haberland goto out; 3084e4dbb0f2SStefan Haberland } 3085e4dbb0f2SStefan Haberland if (((blk_rq_pos(req) + blk_rq_sectors(req)) % 3086e4dbb0f2SStefan Haberland DASD_RAW_SECTORS_PER_TRACK) != 0) { 3087e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EINVAL); 3088e4dbb0f2SStefan Haberland goto out; 3089e4dbb0f2SStefan Haberland } 3090e4dbb0f2SStefan Haberland 3091e4dbb0f2SStefan Haberland first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; 3092e4dbb0f2SStefan Haberland last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / 3093e4dbb0f2SStefan Haberland DASD_RAW_SECTORS_PER_TRACK; 3094e4dbb0f2SStefan Haberland trkcount = last_trk - first_trk + 1; 3095e4dbb0f2SStefan Haberland first_offs = 0; 3096e4dbb0f2SStefan Haberland basedev = block->base; 3097e4dbb0f2SStefan Haberland 3098e4dbb0f2SStefan Haberland if (rq_data_dir(req) == READ) 3099e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_READ_TRACK; 3100e4dbb0f2SStefan Haberland else if (rq_data_dir(req) == WRITE) 3101e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; 3102e4dbb0f2SStefan Haberland else { 3103e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EINVAL); 3104e4dbb0f2SStefan Haberland goto out; 3105e4dbb0f2SStefan Haberland } 3106e4dbb0f2SStefan Haberland 3107e4dbb0f2SStefan Haberland /* 3108e4dbb0f2SStefan Haberland * Raw track based I/O needs IDAWs for each page, 3109e4dbb0f2SStefan Haberland * and not just for 64 bit addresses. 3110e4dbb0f2SStefan Haberland */ 3111e4dbb0f2SStefan Haberland cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; 3112e4dbb0f2SStefan Haberland 3113e4dbb0f2SStefan Haberland /* 1x prefix + one read/write ccw per track */ 3114e4dbb0f2SStefan Haberland cplength = 1 + trkcount; 3115e4dbb0f2SStefan Haberland 3116e4dbb0f2SStefan Haberland /* 3117e4dbb0f2SStefan Haberland * struct PFX_eckd_data has up to 2 byte as extended parameter 3118e4dbb0f2SStefan Haberland * this is needed for write full track and has to be mentioned 311925985edcSLucas De Marchi * separately 3120e4dbb0f2SStefan Haberland * add 8 instead of 2 to keep 8 byte boundary 3121e4dbb0f2SStefan Haberland */ 3122e4dbb0f2SStefan Haberland pfx_datasize = sizeof(struct PFX_eckd_data) + 8; 3123e4dbb0f2SStefan Haberland 3124e4dbb0f2SStefan Haberland datasize = pfx_datasize + cidaw * sizeof(unsigned long long); 3125e4dbb0f2SStefan Haberland 3126e4dbb0f2SStefan Haberland /* Allocate the ccw request. */ 3127e4dbb0f2SStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 3128e4dbb0f2SStefan Haberland datasize, startdev); 3129e4dbb0f2SStefan Haberland if (IS_ERR(cqr)) 3130e4dbb0f2SStefan Haberland goto out; 3131e4dbb0f2SStefan Haberland ccw = cqr->cpaddr; 3132e4dbb0f2SStefan Haberland 3133e4dbb0f2SStefan Haberland if (prefix_LRE(ccw++, cqr->data, first_trk, last_trk, cmd, 3134e4dbb0f2SStefan Haberland basedev, startdev, 1 /* format */, first_offs + 1, 3135e4dbb0f2SStefan Haberland trkcount, 0, 0) == -EAGAIN) { 3136e4dbb0f2SStefan Haberland /* Clock not in sync and XRC is enabled. 3137e4dbb0f2SStefan Haberland * Try again later. 3138e4dbb0f2SStefan Haberland */ 3139e4dbb0f2SStefan Haberland dasd_sfree_request(cqr, startdev); 3140e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EAGAIN); 3141e4dbb0f2SStefan Haberland goto out; 3142e4dbb0f2SStefan Haberland } 3143e4dbb0f2SStefan Haberland 3144e4dbb0f2SStefan Haberland idaws = (unsigned long *)(cqr->data + pfx_datasize); 3145e4dbb0f2SStefan Haberland 3146e4dbb0f2SStefan Haberland len_to_track_end = 0; 3147e4dbb0f2SStefan Haberland 3148e4dbb0f2SStefan Haberland rq_for_each_segment(bv, req, iter) { 3149e4dbb0f2SStefan Haberland dst = page_address(bv->bv_page) + bv->bv_offset; 3150e4dbb0f2SStefan Haberland seg_len = bv->bv_len; 3151e4dbb0f2SStefan Haberland if (!len_to_track_end) { 3152e4dbb0f2SStefan Haberland ccw[-1].flags |= CCW_FLAG_CC; 3153e4dbb0f2SStefan Haberland ccw->cmd_code = cmd; 3154e4dbb0f2SStefan Haberland /* maximum 3390 track size */ 3155e4dbb0f2SStefan Haberland ccw->count = 57326; 3156e4dbb0f2SStefan Haberland /* 64k map to one track */ 3157e4dbb0f2SStefan Haberland len_to_track_end = 65536; 3158e4dbb0f2SStefan Haberland ccw->cda = (__u32)(addr_t)idaws; 3159e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_IDA; 3160e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 3161e4dbb0f2SStefan Haberland ccw++; 3162e4dbb0f2SStefan Haberland } 3163e4dbb0f2SStefan Haberland len_to_track_end -= seg_len; 3164e4dbb0f2SStefan Haberland idaws = idal_create_words(idaws, dst, seg_len); 3165e4dbb0f2SStefan Haberland } 3166e4dbb0f2SStefan Haberland 3167e4dbb0f2SStefan Haberland if (blk_noretry_request(req) || 3168e4dbb0f2SStefan Haberland block->base->features & DASD_FEATURE_FAILFAST) 3169e4dbb0f2SStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3170e4dbb0f2SStefan Haberland cqr->startdev = startdev; 3171e4dbb0f2SStefan Haberland cqr->memdev = startdev; 3172e4dbb0f2SStefan Haberland cqr->block = block; 3173e4dbb0f2SStefan Haberland cqr->expires = startdev->default_expires * HZ; 3174e4dbb0f2SStefan Haberland cqr->lpm = startdev->path_data.ppm; 3175e4dbb0f2SStefan Haberland cqr->retries = 256; 3176e4dbb0f2SStefan Haberland cqr->buildclk = get_clock(); 3177e4dbb0f2SStefan Haberland cqr->status = DASD_CQR_FILLED; 3178e4dbb0f2SStefan Haberland 3179e4dbb0f2SStefan Haberland if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN) 3180e4dbb0f2SStefan Haberland cqr = NULL; 3181e4dbb0f2SStefan Haberland out: 3182e4dbb0f2SStefan Haberland return cqr; 3183e4dbb0f2SStefan Haberland } 3184e4dbb0f2SStefan Haberland 3185e4dbb0f2SStefan Haberland 31861da177e4SLinus Torvalds static int 31871da177e4SLinus Torvalds dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 31881da177e4SLinus Torvalds { 31891da177e4SLinus Torvalds struct dasd_eckd_private *private; 31901da177e4SLinus Torvalds struct ccw1 *ccw; 31915705f702SNeilBrown struct req_iterator iter; 31921da177e4SLinus Torvalds struct bio_vec *bv; 31931da177e4SLinus Torvalds char *dst, *cda; 31941da177e4SLinus Torvalds unsigned int blksize, blk_per_trk, off; 31951da177e4SLinus Torvalds sector_t recid; 31965705f702SNeilBrown int status; 31971da177e4SLinus Torvalds 31981da177e4SLinus Torvalds if (!dasd_page_cache) 31991da177e4SLinus Torvalds goto out; 32008e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) cqr->block->base->private; 32018e09f215SStefan Weinhuber blksize = cqr->block->bp_block; 32021da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 320383096ebfSTejun Heo recid = blk_rq_pos(req) >> cqr->block->s2b_shift; 32041da177e4SLinus Torvalds ccw = cqr->cpaddr; 32051da177e4SLinus Torvalds /* Skip over define extent & locate record. */ 32061da177e4SLinus Torvalds ccw++; 32071da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 32081da177e4SLinus Torvalds ccw++; 32095705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 32101da177e4SLinus Torvalds dst = page_address(bv->bv_page) + bv->bv_offset; 32111da177e4SLinus Torvalds for (off = 0; off < bv->bv_len; off += blksize) { 32121da177e4SLinus Torvalds /* Skip locate record. */ 32131da177e4SLinus Torvalds if (private->uses_cdl && recid <= 2*blk_per_trk) 32141da177e4SLinus Torvalds ccw++; 32151da177e4SLinus Torvalds if (dst) { 32161da177e4SLinus Torvalds if (ccw->flags & CCW_FLAG_IDA) 32171da177e4SLinus Torvalds cda = *((char **)((addr_t) ccw->cda)); 32181da177e4SLinus Torvalds else 32191da177e4SLinus Torvalds cda = (char *)((addr_t) ccw->cda); 32201da177e4SLinus Torvalds if (dst != cda) { 32211da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 32221da177e4SLinus Torvalds memcpy(dst, cda, bv->bv_len); 32231da177e4SLinus Torvalds kmem_cache_free(dasd_page_cache, 32241da177e4SLinus Torvalds (void *)((addr_t)cda & PAGE_MASK)); 32251da177e4SLinus Torvalds } 32261da177e4SLinus Torvalds dst = NULL; 32271da177e4SLinus Torvalds } 32281da177e4SLinus Torvalds ccw++; 32291da177e4SLinus Torvalds recid++; 32301da177e4SLinus Torvalds } 32311da177e4SLinus Torvalds } 32321da177e4SLinus Torvalds out: 32331da177e4SLinus Torvalds status = cqr->status == DASD_CQR_DONE; 32348e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 32351da177e4SLinus Torvalds return status; 32361da177e4SLinus Torvalds } 32371da177e4SLinus Torvalds 32388e09f215SStefan Weinhuber /* 3239f3eb5384SStefan Weinhuber * Modify ccw/tcw in cqr so it can be started on a base device. 32408e09f215SStefan Weinhuber * 32418e09f215SStefan Weinhuber * Note that this is not enough to restart the cqr! 32428e09f215SStefan Weinhuber * Either reset cqr->startdev as well (summary unit check handling) 32438e09f215SStefan Weinhuber * or restart via separate cqr (as in ERP handling). 32448e09f215SStefan Weinhuber */ 32458e09f215SStefan Weinhuber void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 32468e09f215SStefan Weinhuber { 32478e09f215SStefan Weinhuber struct ccw1 *ccw; 32488e09f215SStefan Weinhuber struct PFX_eckd_data *pfxdata; 3249f3eb5384SStefan Weinhuber struct tcw *tcw; 3250f3eb5384SStefan Weinhuber struct tccb *tccb; 3251f3eb5384SStefan Weinhuber struct dcw *dcw; 32528e09f215SStefan Weinhuber 3253f3eb5384SStefan Weinhuber if (cqr->cpmode == 1) { 3254f3eb5384SStefan Weinhuber tcw = cqr->cpaddr; 3255f3eb5384SStefan Weinhuber tccb = tcw_get_tccb(tcw); 3256f3eb5384SStefan Weinhuber dcw = (struct dcw *)&tccb->tca[0]; 3257f3eb5384SStefan Weinhuber pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; 3258f3eb5384SStefan Weinhuber pfxdata->validity.verify_base = 0; 3259f3eb5384SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 3260f3eb5384SStefan Weinhuber } else { 32618e09f215SStefan Weinhuber ccw = cqr->cpaddr; 32628e09f215SStefan Weinhuber pfxdata = cqr->data; 32638e09f215SStefan Weinhuber if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 32648e09f215SStefan Weinhuber pfxdata->validity.verify_base = 0; 32658e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 32668e09f215SStefan Weinhuber } 32678e09f215SStefan Weinhuber } 3268f3eb5384SStefan Weinhuber } 32698e09f215SStefan Weinhuber 32708e09f215SStefan Weinhuber #define DASD_ECKD_CHANQ_MAX_SIZE 4 32718e09f215SStefan Weinhuber 32728e09f215SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 32738e09f215SStefan Weinhuber struct dasd_block *block, 32748e09f215SStefan Weinhuber struct request *req) 32758e09f215SStefan Weinhuber { 32768e09f215SStefan Weinhuber struct dasd_eckd_private *private; 32778e09f215SStefan Weinhuber struct dasd_device *startdev; 32788e09f215SStefan Weinhuber unsigned long flags; 32798e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 32808e09f215SStefan Weinhuber 32818e09f215SStefan Weinhuber startdev = dasd_alias_get_start_dev(base); 32828e09f215SStefan Weinhuber if (!startdev) 32838e09f215SStefan Weinhuber startdev = base; 32848e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) startdev->private; 32858e09f215SStefan Weinhuber if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 32868e09f215SStefan Weinhuber return ERR_PTR(-EBUSY); 32878e09f215SStefan Weinhuber 32888e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 32898e09f215SStefan Weinhuber private->count++; 3290e4dbb0f2SStefan Haberland if ((base->features & DASD_FEATURE_USERAW)) 3291e4dbb0f2SStefan Haberland cqr = dasd_raw_build_cp(startdev, block, req); 3292e4dbb0f2SStefan Haberland else 32938e09f215SStefan Weinhuber cqr = dasd_eckd_build_cp(startdev, block, req); 32948e09f215SStefan Weinhuber if (IS_ERR(cqr)) 32958e09f215SStefan Weinhuber private->count--; 32968e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 32978e09f215SStefan Weinhuber return cqr; 32988e09f215SStefan Weinhuber } 32998e09f215SStefan Weinhuber 33008e09f215SStefan Weinhuber static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 33018e09f215SStefan Weinhuber struct request *req) 33028e09f215SStefan Weinhuber { 33038e09f215SStefan Weinhuber struct dasd_eckd_private *private; 33048e09f215SStefan Weinhuber unsigned long flags; 33058e09f215SStefan Weinhuber 33068e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 33078e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) cqr->memdev->private; 33088e09f215SStefan Weinhuber private->count--; 33098e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 33108e09f215SStefan Weinhuber return dasd_eckd_free_cp(cqr, req); 33118e09f215SStefan Weinhuber } 33128e09f215SStefan Weinhuber 33131da177e4SLinus Torvalds static int 33141da177e4SLinus Torvalds dasd_eckd_fill_info(struct dasd_device * device, 33151da177e4SLinus Torvalds struct dasd_information2_t * info) 33161da177e4SLinus Torvalds { 33171da177e4SLinus Torvalds struct dasd_eckd_private *private; 33181da177e4SLinus Torvalds 33191da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 33201da177e4SLinus Torvalds info->label_block = 2; 33211da177e4SLinus Torvalds info->FBA_layout = private->uses_cdl ? 0 : 1; 33221da177e4SLinus Torvalds info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 33231da177e4SLinus Torvalds info->characteristics_size = sizeof(struct dasd_eckd_characteristics); 33241da177e4SLinus Torvalds memcpy(info->characteristics, &private->rdc_data, 33251da177e4SLinus Torvalds sizeof(struct dasd_eckd_characteristics)); 33264abb08c2SStefan Weinhuber info->confdata_size = min((unsigned long)private->conf_len, 33274abb08c2SStefan Weinhuber sizeof(info->configuration_data)); 33284abb08c2SStefan Weinhuber memcpy(info->configuration_data, private->conf_data, 33294abb08c2SStefan Weinhuber info->confdata_size); 33301da177e4SLinus Torvalds return 0; 33311da177e4SLinus Torvalds } 33321da177e4SLinus Torvalds 33331da177e4SLinus Torvalds /* 33341da177e4SLinus Torvalds * SECTION: ioctl functions for eckd devices. 33351da177e4SLinus Torvalds */ 33361da177e4SLinus Torvalds 33371da177e4SLinus Torvalds /* 33381da177e4SLinus Torvalds * Release device ioctl. 33391da177e4SLinus Torvalds * Buils a channel programm to releases a prior reserved 33401da177e4SLinus Torvalds * (see dasd_eckd_reserve) device. 33411da177e4SLinus Torvalds */ 33421da177e4SLinus Torvalds static int 33431107ccfbSChristoph Hellwig dasd_eckd_release(struct dasd_device *device) 33441da177e4SLinus Torvalds { 33451da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 33461da177e4SLinus Torvalds int rc; 3347f3eb5384SStefan Weinhuber struct ccw1 *ccw; 3348f932bceaSStefan Weinhuber int useglobal; 33491da177e4SLinus Torvalds 33501da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 33511da177e4SLinus Torvalds return -EACCES; 33521da177e4SLinus Torvalds 3353f932bceaSStefan Weinhuber useglobal = 0; 335468b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 33551da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3356f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3357f932bceaSStefan Weinhuber useglobal = 1; 3358f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3359f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3360f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3361f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3362f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3363f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3364f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 33651da177e4SLinus Torvalds } 3366f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 3367f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RELEASE; 3368f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3369f3eb5384SStefan Weinhuber ccw->count = 32; 3370f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 33718e09f215SStefan Weinhuber cqr->startdev = device; 33728e09f215SStefan Weinhuber cqr->memdev = device; 33731da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 33741c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3375336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 33761da177e4SLinus Torvalds cqr->expires = 2 * HZ; 33771da177e4SLinus Torvalds cqr->buildclk = get_clock(); 33781da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 33791da177e4SLinus Torvalds 33801da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 33815a27e60dSStefan Weinhuber if (!rc) 33825a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 33831da177e4SLinus Torvalds 3384f932bceaSStefan Weinhuber if (useglobal) 3385f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3386f932bceaSStefan Weinhuber else 33878e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 33881da177e4SLinus Torvalds return rc; 33891da177e4SLinus Torvalds } 33901da177e4SLinus Torvalds 33911da177e4SLinus Torvalds /* 33921da177e4SLinus Torvalds * Reserve device ioctl. 33931da177e4SLinus Torvalds * Options are set to 'synchronous wait for interrupt' and 33941da177e4SLinus Torvalds * 'timeout the request'. This leads to a terminate IO if 33951da177e4SLinus Torvalds * the interrupt is outstanding for a certain time. 33961da177e4SLinus Torvalds */ 33971da177e4SLinus Torvalds static int 33981107ccfbSChristoph Hellwig dasd_eckd_reserve(struct dasd_device *device) 33991da177e4SLinus Torvalds { 34001da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 34011da177e4SLinus Torvalds int rc; 3402f3eb5384SStefan Weinhuber struct ccw1 *ccw; 3403f932bceaSStefan Weinhuber int useglobal; 34041da177e4SLinus Torvalds 34051da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 34061da177e4SLinus Torvalds return -EACCES; 34071da177e4SLinus Torvalds 3408f932bceaSStefan Weinhuber useglobal = 0; 340968b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 34101da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3411f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3412f932bceaSStefan Weinhuber useglobal = 1; 3413f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3414f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3415f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3416f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3417f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3418f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3419f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 34201da177e4SLinus Torvalds } 3421f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 3422f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RESERVE; 3423f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3424f3eb5384SStefan Weinhuber ccw->count = 32; 3425f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 34268e09f215SStefan Weinhuber cqr->startdev = device; 34278e09f215SStefan Weinhuber cqr->memdev = device; 34281da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 34291c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3430336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 34311da177e4SLinus Torvalds cqr->expires = 2 * HZ; 34321da177e4SLinus Torvalds cqr->buildclk = get_clock(); 34331da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 34341da177e4SLinus Torvalds 34351da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 34365a27e60dSStefan Weinhuber if (!rc) 34375a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 34381da177e4SLinus Torvalds 3439f932bceaSStefan Weinhuber if (useglobal) 3440f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3441f932bceaSStefan Weinhuber else 34428e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 34431da177e4SLinus Torvalds return rc; 34441da177e4SLinus Torvalds } 34451da177e4SLinus Torvalds 34461da177e4SLinus Torvalds /* 34471da177e4SLinus Torvalds * Steal lock ioctl - unconditional reserve device. 34481da177e4SLinus Torvalds * Buils a channel programm to break a device's reservation. 34491da177e4SLinus Torvalds * (unconditional reserve) 34501da177e4SLinus Torvalds */ 34511da177e4SLinus Torvalds static int 34521107ccfbSChristoph Hellwig dasd_eckd_steal_lock(struct dasd_device *device) 34531da177e4SLinus Torvalds { 34541da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 34551da177e4SLinus Torvalds int rc; 3456f3eb5384SStefan Weinhuber struct ccw1 *ccw; 3457f932bceaSStefan Weinhuber int useglobal; 34581da177e4SLinus Torvalds 34591da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 34601da177e4SLinus Torvalds return -EACCES; 34611da177e4SLinus Torvalds 3462f932bceaSStefan Weinhuber useglobal = 0; 346368b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 34641da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3465f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3466f932bceaSStefan Weinhuber useglobal = 1; 3467f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3468f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3469f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3470f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3471f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3472f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3473f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 34741da177e4SLinus Torvalds } 3475f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 3476f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SLCK; 3477f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3478f3eb5384SStefan Weinhuber ccw->count = 32; 3479f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 34808e09f215SStefan Weinhuber cqr->startdev = device; 34818e09f215SStefan Weinhuber cqr->memdev = device; 34821da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 34831c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3484336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 34851da177e4SLinus Torvalds cqr->expires = 2 * HZ; 34861da177e4SLinus Torvalds cqr->buildclk = get_clock(); 34871da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 34881da177e4SLinus Torvalds 34891da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 34905a27e60dSStefan Weinhuber if (!rc) 34915a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 34921da177e4SLinus Torvalds 3493f932bceaSStefan Weinhuber if (useglobal) 3494f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3495f932bceaSStefan Weinhuber else 34968e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 34971da177e4SLinus Torvalds return rc; 34981da177e4SLinus Torvalds } 34991da177e4SLinus Torvalds 35001da177e4SLinus Torvalds /* 3501196339f1SStefan Weinhuber * SNID - Sense Path Group ID 3502196339f1SStefan Weinhuber * This ioctl may be used in situations where I/O is stalled due to 3503196339f1SStefan Weinhuber * a reserve, so if the normal dasd_smalloc_request fails, we use the 3504196339f1SStefan Weinhuber * preallocated dasd_reserve_req. 3505196339f1SStefan Weinhuber */ 3506196339f1SStefan Weinhuber static int dasd_eckd_snid(struct dasd_device *device, 3507196339f1SStefan Weinhuber void __user *argp) 3508196339f1SStefan Weinhuber { 3509196339f1SStefan Weinhuber struct dasd_ccw_req *cqr; 3510196339f1SStefan Weinhuber int rc; 3511196339f1SStefan Weinhuber struct ccw1 *ccw; 3512196339f1SStefan Weinhuber int useglobal; 3513196339f1SStefan Weinhuber struct dasd_snid_ioctl_data usrparm; 3514196339f1SStefan Weinhuber 3515196339f1SStefan Weinhuber if (!capable(CAP_SYS_ADMIN)) 3516196339f1SStefan Weinhuber return -EACCES; 3517196339f1SStefan Weinhuber 3518196339f1SStefan Weinhuber if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 3519196339f1SStefan Weinhuber return -EFAULT; 3520196339f1SStefan Weinhuber 3521196339f1SStefan Weinhuber useglobal = 0; 3522196339f1SStefan Weinhuber cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 3523196339f1SStefan Weinhuber sizeof(struct dasd_snid_data), device); 3524196339f1SStefan Weinhuber if (IS_ERR(cqr)) { 3525196339f1SStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3526196339f1SStefan Weinhuber useglobal = 1; 3527196339f1SStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3528196339f1SStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3529196339f1SStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3530196339f1SStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3531196339f1SStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3532196339f1SStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3533196339f1SStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 3534196339f1SStefan Weinhuber } 3535196339f1SStefan Weinhuber ccw = cqr->cpaddr; 3536196339f1SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SNID; 3537196339f1SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3538196339f1SStefan Weinhuber ccw->count = 12; 3539196339f1SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 3540196339f1SStefan Weinhuber cqr->startdev = device; 3541196339f1SStefan Weinhuber cqr->memdev = device; 3542196339f1SStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3543196339f1SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 35445a27e60dSStefan Weinhuber set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 3545196339f1SStefan Weinhuber cqr->retries = 5; 3546196339f1SStefan Weinhuber cqr->expires = 10 * HZ; 3547196339f1SStefan Weinhuber cqr->buildclk = get_clock(); 3548196339f1SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 3549196339f1SStefan Weinhuber cqr->lpm = usrparm.path_mask; 3550196339f1SStefan Weinhuber 3551196339f1SStefan Weinhuber rc = dasd_sleep_on_immediatly(cqr); 3552196339f1SStefan Weinhuber /* verify that I/O processing didn't modify the path mask */ 3553196339f1SStefan Weinhuber if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) 3554196339f1SStefan Weinhuber rc = -EIO; 3555196339f1SStefan Weinhuber if (!rc) { 3556196339f1SStefan Weinhuber usrparm.data = *((struct dasd_snid_data *)cqr->data); 3557196339f1SStefan Weinhuber if (copy_to_user(argp, &usrparm, sizeof(usrparm))) 3558196339f1SStefan Weinhuber rc = -EFAULT; 3559196339f1SStefan Weinhuber } 3560196339f1SStefan Weinhuber 3561196339f1SStefan Weinhuber if (useglobal) 3562196339f1SStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3563196339f1SStefan Weinhuber else 3564196339f1SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 3565196339f1SStefan Weinhuber return rc; 3566196339f1SStefan Weinhuber } 3567196339f1SStefan Weinhuber 3568196339f1SStefan Weinhuber /* 35691da177e4SLinus Torvalds * Read performance statistics 35701da177e4SLinus Torvalds */ 35711da177e4SLinus Torvalds static int 35721107ccfbSChristoph Hellwig dasd_eckd_performance(struct dasd_device *device, void __user *argp) 35731da177e4SLinus Torvalds { 35741da177e4SLinus Torvalds struct dasd_psf_prssd_data *prssdp; 35751da177e4SLinus Torvalds struct dasd_rssd_perf_stats_t *stats; 35761da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 35771da177e4SLinus Torvalds struct ccw1 *ccw; 35781da177e4SLinus Torvalds int rc; 35791da177e4SLinus Torvalds 358068b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 35811da177e4SLinus Torvalds (sizeof(struct dasd_psf_prssd_data) + 35821da177e4SLinus Torvalds sizeof(struct dasd_rssd_perf_stats_t)), 35831da177e4SLinus Torvalds device); 35841da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3585fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 35861da177e4SLinus Torvalds "Could not allocate initialization request"); 35871da177e4SLinus Torvalds return PTR_ERR(cqr); 35881da177e4SLinus Torvalds } 35898e09f215SStefan Weinhuber cqr->startdev = device; 35908e09f215SStefan Weinhuber cqr->memdev = device; 35911da177e4SLinus Torvalds cqr->retries = 0; 3592eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 35931da177e4SLinus Torvalds cqr->expires = 10 * HZ; 35941da177e4SLinus Torvalds 35951da177e4SLinus Torvalds /* Prepare for Read Subsystem Data */ 35961da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 35971da177e4SLinus Torvalds memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 35981da177e4SLinus Torvalds prssdp->order = PSF_ORDER_PRSSD; 35995d67d164SJoe Perches prssdp->suborder = 0x01; /* Performance Statistics */ 36001da177e4SLinus Torvalds prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 36011da177e4SLinus Torvalds 36021da177e4SLinus Torvalds ccw = cqr->cpaddr; 36031da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_PSF; 36041da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_psf_prssd_data); 36051da177e4SLinus Torvalds ccw->flags |= CCW_FLAG_CC; 36061da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) prssdp; 36071da177e4SLinus Torvalds 36081da177e4SLinus Torvalds /* Read Subsystem Data - Performance Statistics */ 36091da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 36101da177e4SLinus Torvalds memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 36111da177e4SLinus Torvalds 36121da177e4SLinus Torvalds ccw++; 36131da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_RSSD; 36141da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 36151da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) stats; 36161da177e4SLinus Torvalds 36171da177e4SLinus Torvalds cqr->buildclk = get_clock(); 36181da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 36191da177e4SLinus Torvalds rc = dasd_sleep_on(cqr); 36201da177e4SLinus Torvalds if (rc == 0) { 36211da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 36221da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 36231107ccfbSChristoph Hellwig if (copy_to_user(argp, stats, 36241107ccfbSChristoph Hellwig sizeof(struct dasd_rssd_perf_stats_t))) 36251107ccfbSChristoph Hellwig rc = -EFAULT; 36261da177e4SLinus Torvalds } 36278e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 36281da177e4SLinus Torvalds return rc; 36291da177e4SLinus Torvalds } 36301da177e4SLinus Torvalds 36311da177e4SLinus Torvalds /* 36321da177e4SLinus Torvalds * Get attributes (cache operations) 36331da177e4SLinus Torvalds * Returnes the cache attributes used in Define Extend (DE). 36341da177e4SLinus Torvalds */ 36351da177e4SLinus Torvalds static int 36361107ccfbSChristoph Hellwig dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 36371da177e4SLinus Torvalds { 36381107ccfbSChristoph Hellwig struct dasd_eckd_private *private = 36391107ccfbSChristoph Hellwig (struct dasd_eckd_private *)device->private; 36401107ccfbSChristoph Hellwig struct attrib_data_t attrib = private->attrib; 36411da177e4SLinus Torvalds int rc; 36421da177e4SLinus Torvalds 36431da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 36441da177e4SLinus Torvalds return -EACCES; 36451107ccfbSChristoph Hellwig if (!argp) 36461da177e4SLinus Torvalds return -EINVAL; 36471da177e4SLinus Torvalds 36481107ccfbSChristoph Hellwig rc = 0; 36491107ccfbSChristoph Hellwig if (copy_to_user(argp, (long *) &attrib, 36501107ccfbSChristoph Hellwig sizeof(struct attrib_data_t))) 36511107ccfbSChristoph Hellwig rc = -EFAULT; 36521da177e4SLinus Torvalds 36531da177e4SLinus Torvalds return rc; 36541da177e4SLinus Torvalds } 36551da177e4SLinus Torvalds 36561da177e4SLinus Torvalds /* 36571da177e4SLinus Torvalds * Set attributes (cache operations) 36581da177e4SLinus Torvalds * Stores the attributes for cache operation to be used in Define Extend (DE). 36591da177e4SLinus Torvalds */ 36601da177e4SLinus Torvalds static int 36611107ccfbSChristoph Hellwig dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 36621da177e4SLinus Torvalds { 36631107ccfbSChristoph Hellwig struct dasd_eckd_private *private = 36641107ccfbSChristoph Hellwig (struct dasd_eckd_private *)device->private; 36651da177e4SLinus Torvalds struct attrib_data_t attrib; 36661da177e4SLinus Torvalds 36671da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 36681da177e4SLinus Torvalds return -EACCES; 36691107ccfbSChristoph Hellwig if (!argp) 36701da177e4SLinus Torvalds return -EINVAL; 36711da177e4SLinus Torvalds 36721107ccfbSChristoph Hellwig if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 36731da177e4SLinus Torvalds return -EFAULT; 36741da177e4SLinus Torvalds private->attrib = attrib; 36751da177e4SLinus Torvalds 3676fc19f381SStefan Haberland dev_info(&device->cdev->dev, 3677fc19f381SStefan Haberland "The DASD cache mode was set to %x (%i cylinder prestage)\n", 36781da177e4SLinus Torvalds private->attrib.operation, private->attrib.nr_cyl); 36791da177e4SLinus Torvalds return 0; 36801da177e4SLinus Torvalds } 36811da177e4SLinus Torvalds 3682ab1d848fSNigel Hislop /* 3683ab1d848fSNigel Hislop * Issue syscall I/O to EMC Symmetrix array. 3684ab1d848fSNigel Hislop * CCWs are PSF and RSSD 3685ab1d848fSNigel Hislop */ 3686ab1d848fSNigel Hislop static int dasd_symm_io(struct dasd_device *device, void __user *argp) 3687ab1d848fSNigel Hislop { 3688ab1d848fSNigel Hislop struct dasd_symmio_parms usrparm; 3689ab1d848fSNigel Hislop char *psf_data, *rssd_result; 3690ab1d848fSNigel Hislop struct dasd_ccw_req *cqr; 3691ab1d848fSNigel Hislop struct ccw1 *ccw; 369252898025SNigel Hislop char psf0, psf1; 3693ab1d848fSNigel Hislop int rc; 3694ab1d848fSNigel Hislop 369552898025SNigel Hislop if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) 369652898025SNigel Hislop return -EACCES; 369752898025SNigel Hislop psf0 = psf1 = 0; 369852898025SNigel Hislop 3699ab1d848fSNigel Hislop /* Copy parms from caller */ 3700ab1d848fSNigel Hislop rc = -EFAULT; 3701ab1d848fSNigel Hislop if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 3702ab1d848fSNigel Hislop goto out; 3703f8b06859SHeiko Carstens if (is_compat_task() || sizeof(long) == 4) { 3704ab1d848fSNigel Hislop /* Make sure pointers are sane even on 31 bit. */ 3705ab1d848fSNigel Hislop rc = -EINVAL; 3706f8b06859SHeiko Carstens if ((usrparm.psf_data >> 32) != 0) 3707ab1d848fSNigel Hislop goto out; 3708f8b06859SHeiko Carstens if ((usrparm.rssd_result >> 32) != 0) 3709f8b06859SHeiko Carstens goto out; 3710f8b06859SHeiko Carstens usrparm.psf_data &= 0x7fffffffULL; 3711f8b06859SHeiko Carstens usrparm.rssd_result &= 0x7fffffffULL; 3712ab1d848fSNigel Hislop } 3713ab1d848fSNigel Hislop /* alloc I/O data area */ 3714ab1d848fSNigel Hislop psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 3715ab1d848fSNigel Hislop rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 3716ab1d848fSNigel Hislop if (!psf_data || !rssd_result) { 3717ab1d848fSNigel Hislop rc = -ENOMEM; 3718ab1d848fSNigel Hislop goto out_free; 3719ab1d848fSNigel Hislop } 3720ab1d848fSNigel Hislop 3721ab1d848fSNigel Hislop /* get syscall header from user space */ 3722ab1d848fSNigel Hislop rc = -EFAULT; 3723ab1d848fSNigel Hislop if (copy_from_user(psf_data, 3724ab1d848fSNigel Hislop (void __user *)(unsigned long) usrparm.psf_data, 3725ab1d848fSNigel Hislop usrparm.psf_data_len)) 3726ab1d848fSNigel Hislop goto out_free; 372752898025SNigel Hislop psf0 = psf_data[0]; 372852898025SNigel Hislop psf1 = psf_data[1]; 3729ab1d848fSNigel Hislop 3730ab1d848fSNigel Hislop /* setup CCWs for PSF + RSSD */ 373168b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device); 3732ab1d848fSNigel Hislop if (IS_ERR(cqr)) { 3733fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3734ab1d848fSNigel Hislop "Could not allocate initialization request"); 3735ab1d848fSNigel Hislop rc = PTR_ERR(cqr); 3736ab1d848fSNigel Hislop goto out_free; 3737ab1d848fSNigel Hislop } 3738ab1d848fSNigel Hislop 3739ab1d848fSNigel Hislop cqr->startdev = device; 3740ab1d848fSNigel Hislop cqr->memdev = device; 3741ab1d848fSNigel Hislop cqr->retries = 3; 3742ab1d848fSNigel Hislop cqr->expires = 10 * HZ; 3743ab1d848fSNigel Hislop cqr->buildclk = get_clock(); 3744ab1d848fSNigel Hislop cqr->status = DASD_CQR_FILLED; 3745ab1d848fSNigel Hislop 3746ab1d848fSNigel Hislop /* Build the ccws */ 3747ab1d848fSNigel Hislop ccw = cqr->cpaddr; 3748ab1d848fSNigel Hislop 3749ab1d848fSNigel Hislop /* PSF ccw */ 3750ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_PSF; 3751ab1d848fSNigel Hislop ccw->count = usrparm.psf_data_len; 3752ab1d848fSNigel Hislop ccw->flags |= CCW_FLAG_CC; 3753ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) psf_data; 3754ab1d848fSNigel Hislop 3755ab1d848fSNigel Hislop ccw++; 3756ab1d848fSNigel Hislop 3757ab1d848fSNigel Hislop /* RSSD ccw */ 3758ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_RSSD; 3759ab1d848fSNigel Hislop ccw->count = usrparm.rssd_result_len; 3760ab1d848fSNigel Hislop ccw->flags = CCW_FLAG_SLI ; 3761ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) rssd_result; 3762ab1d848fSNigel Hislop 3763ab1d848fSNigel Hislop rc = dasd_sleep_on(cqr); 3764ab1d848fSNigel Hislop if (rc) 3765ab1d848fSNigel Hislop goto out_sfree; 3766ab1d848fSNigel Hislop 3767ab1d848fSNigel Hislop rc = -EFAULT; 3768ab1d848fSNigel Hislop if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 3769ab1d848fSNigel Hislop rssd_result, usrparm.rssd_result_len)) 3770ab1d848fSNigel Hislop goto out_sfree; 3771ab1d848fSNigel Hislop rc = 0; 3772ab1d848fSNigel Hislop 3773ab1d848fSNigel Hislop out_sfree: 3774ab1d848fSNigel Hislop dasd_sfree_request(cqr, cqr->memdev); 3775ab1d848fSNigel Hislop out_free: 3776ab1d848fSNigel Hislop kfree(rssd_result); 3777ab1d848fSNigel Hislop kfree(psf_data); 3778ab1d848fSNigel Hislop out: 377952898025SNigel Hislop DBF_DEV_EVENT(DBF_WARNING, device, 378052898025SNigel Hislop "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", 378152898025SNigel Hislop (int) psf0, (int) psf1, rc); 3782ab1d848fSNigel Hislop return rc; 3783ab1d848fSNigel Hislop } 3784ab1d848fSNigel Hislop 37851107ccfbSChristoph Hellwig static int 37868e09f215SStefan Weinhuber dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 37871107ccfbSChristoph Hellwig { 37888e09f215SStefan Weinhuber struct dasd_device *device = block->base; 37898e09f215SStefan Weinhuber 37901107ccfbSChristoph Hellwig switch (cmd) { 37911107ccfbSChristoph Hellwig case BIODASDGATTR: 37921107ccfbSChristoph Hellwig return dasd_eckd_get_attrib(device, argp); 37931107ccfbSChristoph Hellwig case BIODASDSATTR: 37941107ccfbSChristoph Hellwig return dasd_eckd_set_attrib(device, argp); 37951107ccfbSChristoph Hellwig case BIODASDPSRD: 37961107ccfbSChristoph Hellwig return dasd_eckd_performance(device, argp); 37971107ccfbSChristoph Hellwig case BIODASDRLSE: 37981107ccfbSChristoph Hellwig return dasd_eckd_release(device); 37991107ccfbSChristoph Hellwig case BIODASDRSRV: 38001107ccfbSChristoph Hellwig return dasd_eckd_reserve(device); 38011107ccfbSChristoph Hellwig case BIODASDSLCK: 38021107ccfbSChristoph Hellwig return dasd_eckd_steal_lock(device); 3803196339f1SStefan Weinhuber case BIODASDSNID: 3804196339f1SStefan Weinhuber return dasd_eckd_snid(device, argp); 3805ab1d848fSNigel Hislop case BIODASDSYMMIO: 3806ab1d848fSNigel Hislop return dasd_symm_io(device, argp); 38071107ccfbSChristoph Hellwig default: 38081107ccfbSChristoph Hellwig return -ENOIOCTLCMD; 38091107ccfbSChristoph Hellwig } 38101107ccfbSChristoph Hellwig } 38111107ccfbSChristoph Hellwig 38121da177e4SLinus Torvalds /* 3813445b5b49SHorst Hummel * Dump the range of CCWs into 'page' buffer 3814445b5b49SHorst Hummel * and return number of printed chars. 3815445b5b49SHorst Hummel */ 38164d284cacSHeiko Carstens static int 3817445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 3818445b5b49SHorst Hummel { 3819445b5b49SHorst Hummel int len, count; 3820445b5b49SHorst Hummel char *datap; 3821445b5b49SHorst Hummel 3822445b5b49SHorst Hummel len = 0; 3823445b5b49SHorst Hummel while (from <= to) { 3824445b5b49SHorst Hummel len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3825445b5b49SHorst Hummel " CCW %p: %08X %08X DAT:", 3826445b5b49SHorst Hummel from, ((int *) from)[0], ((int *) from)[1]); 3827445b5b49SHorst Hummel 3828445b5b49SHorst Hummel /* get pointer to data (consider IDALs) */ 3829445b5b49SHorst Hummel if (from->flags & CCW_FLAG_IDA) 3830445b5b49SHorst Hummel datap = (char *) *((addr_t *) (addr_t) from->cda); 3831445b5b49SHorst Hummel else 3832445b5b49SHorst Hummel datap = (char *) ((addr_t) from->cda); 3833445b5b49SHorst Hummel 3834445b5b49SHorst Hummel /* dump data (max 32 bytes) */ 3835445b5b49SHorst Hummel for (count = 0; count < from->count && count < 32; count++) { 3836445b5b49SHorst Hummel if (count % 8 == 0) len += sprintf(page + len, " "); 3837445b5b49SHorst Hummel if (count % 4 == 0) len += sprintf(page + len, " "); 3838445b5b49SHorst Hummel len += sprintf(page + len, "%02x", datap[count]); 3839445b5b49SHorst Hummel } 3840445b5b49SHorst Hummel len += sprintf(page + len, "\n"); 3841445b5b49SHorst Hummel from++; 3842445b5b49SHorst Hummel } 3843445b5b49SHorst Hummel return len; 3844445b5b49SHorst Hummel } 3845445b5b49SHorst Hummel 3846fc19f381SStefan Haberland static void 3847aeec92caSStefan Haberland dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 3848aeec92caSStefan Haberland char *reason) 3849fc19f381SStefan Haberland { 3850fc19f381SStefan Haberland u64 *sense; 3851a5a0061fSStefan Weinhuber u64 *stat; 3852fc19f381SStefan Haberland 3853aeec92caSStefan Haberland sense = (u64 *) dasd_get_sense(irb); 3854a5a0061fSStefan Weinhuber stat = (u64 *) &irb->scsw; 3855fc19f381SStefan Haberland if (sense) { 3856a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " 3857a5a0061fSStefan Weinhuber "%016llx %016llx %016llx %016llx", 3858a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 3859ed3640b2SStefan Haberland sense[0], sense[1], sense[2], sense[3]); 3860fc19f381SStefan Haberland } else { 3861a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", 3862a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 3863a5a0061fSStefan Weinhuber "NO VALID SENSE"); 3864fc19f381SStefan Haberland } 3865fc19f381SStefan Haberland } 3866fc19f381SStefan Haberland 3867445b5b49SHorst Hummel /* 38681da177e4SLinus Torvalds * Print sense data and related channel program. 38691da177e4SLinus Torvalds * Parts are printed because printk buffer is only 1024 bytes. 38701da177e4SLinus Torvalds */ 3871f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 38728e09f215SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 38731da177e4SLinus Torvalds { 38741da177e4SLinus Torvalds char *page; 3875445b5b49SHorst Hummel struct ccw1 *first, *last, *fail, *from, *to; 3876445b5b49SHorst Hummel int len, sl, sct; 38771da177e4SLinus Torvalds 38781da177e4SLinus Torvalds page = (char *) get_zeroed_page(GFP_ATOMIC); 38791da177e4SLinus Torvalds if (page == NULL) { 3880fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3881fc19f381SStefan Haberland "No memory to dump sense data\n"); 38821da177e4SLinus Torvalds return; 38831da177e4SLinus Torvalds } 3884445b5b49SHorst Hummel /* dump the sense data */ 38851da177e4SLinus Torvalds len = sprintf(page, KERN_ERR PRINTK_HEADER 38861da177e4SLinus Torvalds " I/O status report for device %s:\n", 38872a0217d5SKay Sievers dev_name(&device->cdev->dev)); 38881da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3889a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 3890a5a0061fSStefan Weinhuber "CS:%02X RC:%d\n", 3891a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 3892a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 3893a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 3894a5a0061fSStefan Weinhuber req ? req->intrc : 0); 38951da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 38961da177e4SLinus Torvalds " device %s: Failing CCW: %p\n", 38972a0217d5SKay Sievers dev_name(&device->cdev->dev), 389823d805b6SPeter Oberparleiter (void *) (addr_t) irb->scsw.cmd.cpa); 38991da177e4SLinus Torvalds if (irb->esw.esw0.erw.cons) { 39001da177e4SLinus Torvalds for (sl = 0; sl < 4; sl++) { 39011da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 39021da177e4SLinus Torvalds " Sense(hex) %2d-%2d:", 39031da177e4SLinus Torvalds (8 * sl), ((8 * sl) + 7)); 39041da177e4SLinus Torvalds 39051da177e4SLinus Torvalds for (sct = 0; sct < 8; sct++) { 39061da177e4SLinus Torvalds len += sprintf(page + len, " %02x", 39071da177e4SLinus Torvalds irb->ecw[8 * sl + sct]); 39081da177e4SLinus Torvalds } 39091da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 39101da177e4SLinus Torvalds } 39111da177e4SLinus Torvalds 39121da177e4SLinus Torvalds if (irb->ecw[27] & DASD_SENSE_BIT_0) { 39131da177e4SLinus Torvalds /* 24 Byte Sense Data */ 3914445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 39151da177e4SLinus Torvalds " 24 Byte: %x MSG %x, " 39161da177e4SLinus Torvalds "%s MSGb to SYSOP\n", 39171da177e4SLinus Torvalds irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 39181da177e4SLinus Torvalds irb->ecw[1] & 0x10 ? "" : "no"); 39191da177e4SLinus Torvalds } else { 39201da177e4SLinus Torvalds /* 32 Byte Sense Data */ 3921445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 39221da177e4SLinus Torvalds " 32 Byte: Format: %x " 39231da177e4SLinus Torvalds "Exception class %x\n", 39241da177e4SLinus Torvalds irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 39251da177e4SLinus Torvalds } 39261da177e4SLinus Torvalds } else { 3927445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 39281da177e4SLinus Torvalds " SORRY - NO VALID SENSE AVAILABLE\n"); 39291da177e4SLinus Torvalds } 3930445b5b49SHorst Hummel printk("%s", page); 39311da177e4SLinus Torvalds 39328e09f215SStefan Weinhuber if (req) { 39338e09f215SStefan Weinhuber /* req == NULL for unsolicited interrupts */ 3934445b5b49SHorst Hummel /* dump the Channel Program (max 140 Bytes per line) */ 3935445b5b49SHorst Hummel /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 3936445b5b49SHorst Hummel first = req->cpaddr; 3937445b5b49SHorst Hummel for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 3938445b5b49SHorst Hummel to = min(first + 6, last); 39391da177e4SLinus Torvalds len = sprintf(page, KERN_ERR PRINTK_HEADER 39401da177e4SLinus Torvalds " Related CP in req: %p\n", req); 3941445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(first, to, page + len); 3942445b5b49SHorst Hummel printk("%s", page); 39431da177e4SLinus Torvalds 3944445b5b49SHorst Hummel /* print failing CCW area (maximum 4) */ 3945445b5b49SHorst Hummel /* scsw->cda is either valid or zero */ 39461da177e4SLinus Torvalds len = 0; 3947445b5b49SHorst Hummel from = ++to; 394823d805b6SPeter Oberparleiter fail = (struct ccw1 *)(addr_t) 394923d805b6SPeter Oberparleiter irb->scsw.cmd.cpa; /* failing CCW */ 3950445b5b49SHorst Hummel if (from < fail - 2) { 3951445b5b49SHorst Hummel from = fail - 2; /* there is a gap - print header */ 3952445b5b49SHorst Hummel len += sprintf(page, KERN_ERR PRINTK_HEADER "......\n"); 39531da177e4SLinus Torvalds } 3954445b5b49SHorst Hummel to = min(fail + 1, last); 3955445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, to, page + len); 39561da177e4SLinus Torvalds 3957445b5b49SHorst Hummel /* print last CCWs (maximum 2) */ 3958445b5b49SHorst Hummel from = max(from, ++to); 3959445b5b49SHorst Hummel if (from < last - 1) { 3960445b5b49SHorst Hummel from = last - 1; /* there is a gap - print header */ 39611da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n"); 39621da177e4SLinus Torvalds } 3963445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, last, page + len); 39641da177e4SLinus Torvalds if (len > 0) 3965445b5b49SHorst Hummel printk("%s", page); 39668e09f215SStefan Weinhuber } 39671da177e4SLinus Torvalds free_page((unsigned long) page); 39681da177e4SLinus Torvalds } 39691da177e4SLinus Torvalds 3970f3eb5384SStefan Weinhuber 3971f3eb5384SStefan Weinhuber /* 3972f3eb5384SStefan Weinhuber * Print sense data from a tcw. 3973f3eb5384SStefan Weinhuber */ 3974f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 3975f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 3976f3eb5384SStefan Weinhuber { 3977f3eb5384SStefan Weinhuber char *page; 3978f3eb5384SStefan Weinhuber int len, sl, sct, residual; 3979f3eb5384SStefan Weinhuber struct tsb *tsb; 3980ef19298bSStefan Weinhuber u8 *sense, *rcq; 3981f3eb5384SStefan Weinhuber 3982f3eb5384SStefan Weinhuber page = (char *) get_zeroed_page(GFP_ATOMIC); 3983f3eb5384SStefan Weinhuber if (page == NULL) { 3984fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, " %s", 3985f3eb5384SStefan Weinhuber "No memory to dump sense data"); 3986f3eb5384SStefan Weinhuber return; 3987f3eb5384SStefan Weinhuber } 3988f3eb5384SStefan Weinhuber /* dump the sense data */ 3989f3eb5384SStefan Weinhuber len = sprintf(page, KERN_ERR PRINTK_HEADER 3990f3eb5384SStefan Weinhuber " I/O status report for device %s:\n", 3991f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev)); 3992f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3993a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 3994a5a0061fSStefan Weinhuber "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", 3995a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 3996a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 3997a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 3998a5a0061fSStefan Weinhuber irb->scsw.tm.fcxs, irb->scsw.tm.schxs, 3999a5a0061fSStefan Weinhuber req ? req->intrc : 0); 4000f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4001f3eb5384SStefan Weinhuber " device %s: Failing TCW: %p\n", 4002f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev), 4003f3eb5384SStefan Weinhuber (void *) (addr_t) irb->scsw.tm.tcw); 4004f3eb5384SStefan Weinhuber 4005f3eb5384SStefan Weinhuber tsb = NULL; 4006f3eb5384SStefan Weinhuber sense = NULL; 4007a5a0061fSStefan Weinhuber if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) 4008f3eb5384SStefan Weinhuber tsb = tcw_get_tsb( 4009f3eb5384SStefan Weinhuber (struct tcw *)(unsigned long)irb->scsw.tm.tcw); 4010f3eb5384SStefan Weinhuber 4011b8fde722SStefan Haberland if (tsb) { 4012f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4013f3eb5384SStefan Weinhuber " tsb->length %d\n", tsb->length); 4014f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4015f3eb5384SStefan Weinhuber " tsb->flags %x\n", tsb->flags); 4016f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4017f3eb5384SStefan Weinhuber " tsb->dcw_offset %d\n", tsb->dcw_offset); 4018f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4019f3eb5384SStefan Weinhuber " tsb->count %d\n", tsb->count); 4020f3eb5384SStefan Weinhuber residual = tsb->count - 28; 4021f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4022f3eb5384SStefan Weinhuber " residual %d\n", residual); 4023f3eb5384SStefan Weinhuber 4024f3eb5384SStefan Weinhuber switch (tsb->flags & 0x07) { 4025f3eb5384SStefan Weinhuber case 1: /* tsa_iostat */ 4026f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4027f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_time %d\n", 4028f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_time); 4029f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4030f3eb5384SStefan Weinhuber " tsb->tsa.iostat.def_time %d\n", 4031f3eb5384SStefan Weinhuber tsb->tsa.iostat.def_time); 4032f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4033f3eb5384SStefan Weinhuber " tsb->tsa.iostat.queue_time %d\n", 4034f3eb5384SStefan Weinhuber tsb->tsa.iostat.queue_time); 4035f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4036f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_busy_time %d\n", 4037f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_busy_time); 4038f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4039f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_act_time %d\n", 4040f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_act_time); 4041f3eb5384SStefan Weinhuber sense = tsb->tsa.iostat.sense; 4042f3eb5384SStefan Weinhuber break; 4043f3eb5384SStefan Weinhuber case 2: /* ts_ddpc */ 4044f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4045f3eb5384SStefan Weinhuber " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); 4046ef19298bSStefan Weinhuber for (sl = 0; sl < 2; sl++) { 4047ef19298bSStefan Weinhuber len += sprintf(page + len, 4048ef19298bSStefan Weinhuber KERN_ERR PRINTK_HEADER 4049ef19298bSStefan Weinhuber " tsb->tsa.ddpc.rcq %2d-%2d: ", 4050ef19298bSStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 4051ef19298bSStefan Weinhuber rcq = tsb->tsa.ddpc.rcq; 4052f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 4053f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 4054ef19298bSStefan Weinhuber rcq[8 * sl + sct]); 4055f3eb5384SStefan Weinhuber } 4056f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 4057f3eb5384SStefan Weinhuber } 4058f3eb5384SStefan Weinhuber sense = tsb->tsa.ddpc.sense; 4059f3eb5384SStefan Weinhuber break; 4060f3eb5384SStefan Weinhuber case 3: /* tsa_intrg */ 4061f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4062f3eb5384SStefan Weinhuber " tsb->tsa.intrg.: not supportet yet \n"); 4063f3eb5384SStefan Weinhuber break; 4064f3eb5384SStefan Weinhuber } 4065f3eb5384SStefan Weinhuber 4066f3eb5384SStefan Weinhuber if (sense) { 4067f3eb5384SStefan Weinhuber for (sl = 0; sl < 4; sl++) { 4068f3eb5384SStefan Weinhuber len += sprintf(page + len, 4069f3eb5384SStefan Weinhuber KERN_ERR PRINTK_HEADER 4070f3eb5384SStefan Weinhuber " Sense(hex) %2d-%2d:", 4071f3eb5384SStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 4072f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 4073f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 4074f3eb5384SStefan Weinhuber sense[8 * sl + sct]); 4075f3eb5384SStefan Weinhuber } 4076f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 4077f3eb5384SStefan Weinhuber } 4078f3eb5384SStefan Weinhuber 4079f3eb5384SStefan Weinhuber if (sense[27] & DASD_SENSE_BIT_0) { 4080f3eb5384SStefan Weinhuber /* 24 Byte Sense Data */ 4081f3eb5384SStefan Weinhuber sprintf(page + len, KERN_ERR PRINTK_HEADER 4082f3eb5384SStefan Weinhuber " 24 Byte: %x MSG %x, " 4083f3eb5384SStefan Weinhuber "%s MSGb to SYSOP\n", 4084f3eb5384SStefan Weinhuber sense[7] >> 4, sense[7] & 0x0f, 4085f3eb5384SStefan Weinhuber sense[1] & 0x10 ? "" : "no"); 4086f3eb5384SStefan Weinhuber } else { 4087f3eb5384SStefan Weinhuber /* 32 Byte Sense Data */ 4088f3eb5384SStefan Weinhuber sprintf(page + len, KERN_ERR PRINTK_HEADER 4089f3eb5384SStefan Weinhuber " 32 Byte: Format: %x " 4090f3eb5384SStefan Weinhuber "Exception class %x\n", 4091f3eb5384SStefan Weinhuber sense[6] & 0x0f, sense[22] >> 4); 4092f3eb5384SStefan Weinhuber } 4093f3eb5384SStefan Weinhuber } else { 4094f3eb5384SStefan Weinhuber sprintf(page + len, KERN_ERR PRINTK_HEADER 4095f3eb5384SStefan Weinhuber " SORRY - NO VALID SENSE AVAILABLE\n"); 4096f3eb5384SStefan Weinhuber } 4097f3eb5384SStefan Weinhuber } else { 4098f3eb5384SStefan Weinhuber sprintf(page + len, KERN_ERR PRINTK_HEADER 4099f3eb5384SStefan Weinhuber " SORRY - NO TSB DATA AVAILABLE\n"); 4100f3eb5384SStefan Weinhuber } 4101f3eb5384SStefan Weinhuber printk("%s", page); 4102f3eb5384SStefan Weinhuber free_page((unsigned long) page); 4103f3eb5384SStefan Weinhuber } 4104f3eb5384SStefan Weinhuber 4105f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense(struct dasd_device *device, 4106f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 4107f3eb5384SStefan Weinhuber { 4108a5a0061fSStefan Weinhuber if (scsw_is_tm(&irb->scsw)) 4109f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_tcw(device, req, irb); 4110f3eb5384SStefan Weinhuber else 4111f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_ccw(device, req, irb); 4112f3eb5384SStefan Weinhuber } 4113f3eb5384SStefan Weinhuber 4114501183f2SStefan Haberland static int dasd_eckd_pm_freeze(struct dasd_device *device) 4115d41dd122SStefan Haberland { 4116d41dd122SStefan Haberland /* 4117d41dd122SStefan Haberland * the device should be disconnected from our LCU structure 4118d41dd122SStefan Haberland * on restore we will reconnect it and reread LCU specific 4119d41dd122SStefan Haberland * information like PAV support that might have changed 4120d41dd122SStefan Haberland */ 4121d41dd122SStefan Haberland dasd_alias_remove_device(device); 4122d41dd122SStefan Haberland dasd_alias_disconnect_device_from_lcu(device); 4123d41dd122SStefan Haberland 4124d41dd122SStefan Haberland return 0; 4125d41dd122SStefan Haberland } 4126d41dd122SStefan Haberland 4127501183f2SStefan Haberland static int dasd_eckd_restore_device(struct dasd_device *device) 4128d41dd122SStefan Haberland { 4129d41dd122SStefan Haberland struct dasd_eckd_private *private; 41306fca97a9SStefan Haberland struct dasd_eckd_characteristics temp_rdc_data; 4131f9f8d02fSStefan Haberland int rc; 4132d41dd122SStefan Haberland struct dasd_uid temp_uid; 4133a7602f6cSStefan Haberland unsigned long flags; 4134d41dd122SStefan Haberland 4135d41dd122SStefan Haberland private = (struct dasd_eckd_private *) device->private; 4136d41dd122SStefan Haberland 4137d41dd122SStefan Haberland /* Read Configuration Data */ 4138d41dd122SStefan Haberland rc = dasd_eckd_read_conf(device); 4139d41dd122SStefan Haberland if (rc) 4140d41dd122SStefan Haberland goto out_err; 4141d41dd122SStefan Haberland 41422dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 41432dedf0d9SStefan Haberland /* Generate device unique id */ 41442dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 41452dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4146d41dd122SStefan Haberland if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) 4147a7602f6cSStefan Haberland dev_err(&device->cdev->dev, "The UID of the DASD has " 4148a7602f6cSStefan Haberland "changed\n"); 41492dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4150d41dd122SStefan Haberland if (rc) 4151d41dd122SStefan Haberland goto out_err; 4152d41dd122SStefan Haberland 4153d41dd122SStefan Haberland /* register lcu with alias handling, enable PAV if this is a new lcu */ 4154f9f8d02fSStefan Haberland rc = dasd_alias_make_device_known_to_lcu(device); 4155f9f8d02fSStefan Haberland if (rc) 4156f9f8d02fSStefan Haberland return rc; 4157f4ac1d02SStefan Weinhuber dasd_eckd_validate_server(device); 4158f4ac1d02SStefan Weinhuber 4159f4ac1d02SStefan Weinhuber /* RE-Read Configuration Data */ 4160f4ac1d02SStefan Weinhuber rc = dasd_eckd_read_conf(device); 4161d41dd122SStefan Haberland if (rc) 4162d41dd122SStefan Haberland goto out_err; 4163d41dd122SStefan Haberland 4164d41dd122SStefan Haberland /* Read Feature Codes */ 416568d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 4166d41dd122SStefan Haberland 4167d41dd122SStefan Haberland /* Read Device Characteristics */ 416868b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 41696fca97a9SStefan Haberland &temp_rdc_data, 64); 4170d41dd122SStefan Haberland if (rc) { 4171b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 4172b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 4173d41dd122SStefan Haberland goto out_err; 4174d41dd122SStefan Haberland } 4175a7602f6cSStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 41766fca97a9SStefan Haberland memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data)); 4177a7602f6cSStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4178d41dd122SStefan Haberland 4179d41dd122SStefan Haberland /* add device to alias management */ 4180d41dd122SStefan Haberland dasd_alias_add_device(device); 4181d41dd122SStefan Haberland 4182d41dd122SStefan Haberland return 0; 4183d41dd122SStefan Haberland 4184d41dd122SStefan Haberland out_err: 4185e6125fbaSStefan Haberland return -1; 4186d41dd122SStefan Haberland } 4187d41dd122SStefan Haberland 4188501183f2SStefan Haberland static int dasd_eckd_reload_device(struct dasd_device *device) 4189501183f2SStefan Haberland { 4190501183f2SStefan Haberland struct dasd_eckd_private *private; 4191501183f2SStefan Haberland int rc, old_base; 41922dedf0d9SStefan Haberland char print_uid[60]; 41932dedf0d9SStefan Haberland struct dasd_uid uid; 41942dedf0d9SStefan Haberland unsigned long flags; 4195501183f2SStefan Haberland 4196501183f2SStefan Haberland private = (struct dasd_eckd_private *) device->private; 41972dedf0d9SStefan Haberland 41982dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4199501183f2SStefan Haberland old_base = private->uid.base_unit_addr; 42002dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 42012dedf0d9SStefan Haberland 4202501183f2SStefan Haberland /* Read Configuration Data */ 4203501183f2SStefan Haberland rc = dasd_eckd_read_conf(device); 4204501183f2SStefan Haberland if (rc) 4205501183f2SStefan Haberland goto out_err; 4206501183f2SStefan Haberland 42072dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 4208501183f2SStefan Haberland if (rc) 4209501183f2SStefan Haberland goto out_err; 4210501183f2SStefan Haberland /* 4211501183f2SStefan Haberland * update unit address configuration and 4212501183f2SStefan Haberland * add device to alias management 4213501183f2SStefan Haberland */ 4214501183f2SStefan Haberland dasd_alias_update_add_device(device); 4215501183f2SStefan Haberland 42162dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &uid); 42172dedf0d9SStefan Haberland 42182dedf0d9SStefan Haberland if (old_base != uid.base_unit_addr) { 42192dedf0d9SStefan Haberland if (strlen(uid.vduit) > 0) 42202dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 42212dedf0d9SStefan Haberland "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial, 42222dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr, uid.vduit); 4223501183f2SStefan Haberland else 42242dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 42252dedf0d9SStefan Haberland "%s.%s.%04x.%02x", uid.vendor, uid.serial, 42262dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr); 4227501183f2SStefan Haberland 4228501183f2SStefan Haberland dev_info(&device->cdev->dev, 4229501183f2SStefan Haberland "An Alias device was reassigned to a new base device " 42302dedf0d9SStefan Haberland "with UID: %s\n", print_uid); 4231501183f2SStefan Haberland } 4232501183f2SStefan Haberland return 0; 4233501183f2SStefan Haberland 4234501183f2SStefan Haberland out_err: 4235501183f2SStefan Haberland return -1; 4236501183f2SStefan Haberland } 4237501183f2SStefan Haberland 4238d41dd122SStefan Haberland static struct ccw_driver dasd_eckd_driver = { 42393bda058bSSebastian Ott .driver = { 4240d41dd122SStefan Haberland .name = "dasd-eckd", 4241d41dd122SStefan Haberland .owner = THIS_MODULE, 42423bda058bSSebastian Ott }, 4243d41dd122SStefan Haberland .ids = dasd_eckd_ids, 4244d41dd122SStefan Haberland .probe = dasd_eckd_probe, 4245d41dd122SStefan Haberland .remove = dasd_generic_remove, 4246d41dd122SStefan Haberland .set_offline = dasd_generic_set_offline, 4247d41dd122SStefan Haberland .set_online = dasd_eckd_set_online, 4248d41dd122SStefan Haberland .notify = dasd_generic_notify, 4249a4d26c6aSStefan Weinhuber .path_event = dasd_generic_path_event, 42504679e893SStefan Haberland .shutdown = dasd_generic_shutdown, 4251d41dd122SStefan Haberland .freeze = dasd_generic_pm_freeze, 4252d41dd122SStefan Haberland .thaw = dasd_generic_restore_device, 4253d41dd122SStefan Haberland .restore = dasd_generic_restore_device, 4254a23ed009SStefan Haberland .uc_handler = dasd_generic_uc_handler, 4255de400d6bSPeter Oberparleiter .int_class = IOINT_DAS, 4256d41dd122SStefan Haberland }; 4257f3eb5384SStefan Weinhuber 42581da177e4SLinus Torvalds /* 42591da177e4SLinus Torvalds * max_blocks is dependent on the amount of storage that is available 42601da177e4SLinus Torvalds * in the static io buffer for each device. Currently each device has 42611da177e4SLinus Torvalds * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has 42621da177e4SLinus Torvalds * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use 42631da177e4SLinus Torvalds * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In 42641da177e4SLinus Torvalds * addition we have one define extent ccw + 16 bytes of data and one 42651da177e4SLinus Torvalds * locate record ccw + 16 bytes of data. That makes: 42661da177e4SLinus Torvalds * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. 42671da177e4SLinus Torvalds * We want to fit two into the available memory so that we can immediately 42681da177e4SLinus Torvalds * start the next request if one finishes off. That makes 249.5 blocks 42691da177e4SLinus Torvalds * for one request. Give a little safety and the result is 240. 42701da177e4SLinus Torvalds */ 42711da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline = { 42721da177e4SLinus Torvalds .owner = THIS_MODULE, 42731da177e4SLinus Torvalds .name = "ECKD", 42741da177e4SLinus Torvalds .ebcname = "ECKD", 4275ef19298bSStefan Weinhuber .max_blocks = 190, 42761da177e4SLinus Torvalds .check_device = dasd_eckd_check_characteristics, 42778e09f215SStefan Weinhuber .uncheck_device = dasd_eckd_uncheck_device, 42781da177e4SLinus Torvalds .do_analysis = dasd_eckd_do_analysis, 4279a4d26c6aSStefan Weinhuber .verify_path = dasd_eckd_verify_path, 42808e09f215SStefan Weinhuber .ready_to_online = dasd_eckd_ready_to_online, 42818e09f215SStefan Weinhuber .online_to_ready = dasd_eckd_online_to_ready, 42821da177e4SLinus Torvalds .fill_geometry = dasd_eckd_fill_geometry, 42831da177e4SLinus Torvalds .start_IO = dasd_start_IO, 42841da177e4SLinus Torvalds .term_IO = dasd_term_IO, 42858e09f215SStefan Weinhuber .handle_terminated_request = dasd_eckd_handle_terminated_request, 42861da177e4SLinus Torvalds .format_device = dasd_eckd_format_device, 42871da177e4SLinus Torvalds .erp_action = dasd_eckd_erp_action, 42881da177e4SLinus Torvalds .erp_postaction = dasd_eckd_erp_postaction, 42895a27e60dSStefan Weinhuber .check_for_device_change = dasd_eckd_check_for_device_change, 42908e09f215SStefan Weinhuber .build_cp = dasd_eckd_build_alias_cp, 42918e09f215SStefan Weinhuber .free_cp = dasd_eckd_free_alias_cp, 42921da177e4SLinus Torvalds .dump_sense = dasd_eckd_dump_sense, 4293fc19f381SStefan Haberland .dump_sense_dbf = dasd_eckd_dump_sense_dbf, 42941da177e4SLinus Torvalds .fill_info = dasd_eckd_fill_info, 42951107ccfbSChristoph Hellwig .ioctl = dasd_eckd_ioctl, 4296d41dd122SStefan Haberland .freeze = dasd_eckd_pm_freeze, 4297d41dd122SStefan Haberland .restore = dasd_eckd_restore_device, 4298501183f2SStefan Haberland .reload = dasd_eckd_reload_device, 42992dedf0d9SStefan Haberland .get_uid = dasd_eckd_get_uid, 4300f1633031SStefan Haberland .kick_validate = dasd_eckd_kick_validate_server, 43011da177e4SLinus Torvalds }; 43021da177e4SLinus Torvalds 43031da177e4SLinus Torvalds static int __init 43041da177e4SLinus Torvalds dasd_eckd_init(void) 43051da177e4SLinus Torvalds { 4306736e6ea0SSebastian Ott int ret; 4307736e6ea0SSebastian Ott 43081da177e4SLinus Torvalds ASCEBC(dasd_eckd_discipline.ebcname, 4); 4309f932bceaSStefan Weinhuber dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), 4310f932bceaSStefan Weinhuber GFP_KERNEL | GFP_DMA); 4311f932bceaSStefan Weinhuber if (!dasd_reserve_req) 4312f932bceaSStefan Weinhuber return -ENOMEM; 4313a4d26c6aSStefan Weinhuber path_verification_worker = kmalloc(sizeof(*path_verification_worker), 4314a4d26c6aSStefan Weinhuber GFP_KERNEL | GFP_DMA); 4315a4d26c6aSStefan Weinhuber if (!path_verification_worker) { 4316a4d26c6aSStefan Weinhuber kfree(dasd_reserve_req); 4317a4d26c6aSStefan Weinhuber return -ENOMEM; 4318a4d26c6aSStefan Weinhuber } 4319736e6ea0SSebastian Ott ret = ccw_driver_register(&dasd_eckd_driver); 4320736e6ea0SSebastian Ott if (!ret) 4321736e6ea0SSebastian Ott wait_for_device_probe(); 4322a4d26c6aSStefan Weinhuber else { 4323a4d26c6aSStefan Weinhuber kfree(path_verification_worker); 4324f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 4325a4d26c6aSStefan Weinhuber } 4326736e6ea0SSebastian Ott return ret; 43271da177e4SLinus Torvalds } 43281da177e4SLinus Torvalds 43291da177e4SLinus Torvalds static void __exit 43301da177e4SLinus Torvalds dasd_eckd_cleanup(void) 43311da177e4SLinus Torvalds { 43321da177e4SLinus Torvalds ccw_driver_unregister(&dasd_eckd_driver); 4333a4d26c6aSStefan Weinhuber kfree(path_verification_worker); 4334f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 43351da177e4SLinus Torvalds } 43361da177e4SLinus Torvalds 43371da177e4SLinus Torvalds module_init(dasd_eckd_init); 43381da177e4SLinus Torvalds module_exit(dasd_eckd_cleanup); 4339