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> 211da177e4SLinus Torvalds #include <linux/init.h> 221da177e4SLinus Torvalds 231da177e4SLinus Torvalds #include <asm/debug.h> 241da177e4SLinus Torvalds #include <asm/idals.h> 251da177e4SLinus Torvalds #include <asm/ebcdic.h> 26f8b06859SHeiko Carstens #include <asm/compat.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 153740545573SHorst Hummel if (dasd_nopav || MACHINE_IS_VM) 1538f3eb5384SStefan Weinhuber enable_pav = 0; 1539f3eb5384SStefan Weinhuber else 1540f3eb5384SStefan Weinhuber enable_pav = 1; 1541f3eb5384SStefan Weinhuber rc = dasd_eckd_psf_ssc(device, enable_pav); 1542eb6e199bSStefan Weinhuber 154340545573SHorst Hummel /* may be requested feature is not available on server, 154440545573SHorst Hummel * therefore just report error and go ahead */ 15458e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 1546b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " 1547b8ed5dd5SStefan Haberland "returned rc=%d", private->uid.ssid, rc); 154840545573SHorst Hummel } 154940545573SHorst Hummel 1550ef19298bSStefan Weinhuber static u32 get_fcx_max_data(struct dasd_device *device) 1551ef19298bSStefan Weinhuber { 1552ef19298bSStefan Weinhuber #if defined(CONFIG_64BIT) 1553ef19298bSStefan Weinhuber int tpm, mdc; 1554ef19298bSStefan Weinhuber int fcx_in_css, fcx_in_gneq, fcx_in_features; 1555ef19298bSStefan Weinhuber struct dasd_eckd_private *private; 1556ef19298bSStefan Weinhuber 1557ef19298bSStefan Weinhuber if (dasd_nofcx) 1558ef19298bSStefan Weinhuber return 0; 1559ef19298bSStefan Weinhuber /* is transport mode supported? */ 1560ef19298bSStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 1561ef19298bSStefan Weinhuber fcx_in_css = css_general_characteristics.fcx; 1562ef19298bSStefan Weinhuber fcx_in_gneq = private->gneq->reserved2[7] & 0x04; 1563ef19298bSStefan Weinhuber fcx_in_features = private->features.feature[40] & 0x80; 1564ef19298bSStefan Weinhuber tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; 1565ef19298bSStefan Weinhuber 1566ef19298bSStefan Weinhuber if (!tpm) 1567ef19298bSStefan Weinhuber return 0; 1568ef19298bSStefan Weinhuber 1569ef19298bSStefan Weinhuber mdc = ccw_device_get_mdc(device->cdev, 0); 1570ef19298bSStefan Weinhuber if (mdc < 0) { 1571ef19298bSStefan Weinhuber dev_warn(&device->cdev->dev, "Detecting the maximum supported" 1572ef19298bSStefan Weinhuber " data size for zHPF requests failed\n"); 1573ef19298bSStefan Weinhuber return 0; 1574ef19298bSStefan Weinhuber } else 1575ef19298bSStefan Weinhuber return mdc * FCX_MAX_DATA_FACTOR; 1576ef19298bSStefan Weinhuber #else 1577ef19298bSStefan Weinhuber return 0; 1578ef19298bSStefan Weinhuber #endif 1579ef19298bSStefan Weinhuber } 1580ef19298bSStefan Weinhuber 158140545573SHorst Hummel /* 15823d052595SHorst Hummel * Check device characteristics. 15833d052595SHorst Hummel * If the device is accessible using ECKD discipline, the device is enabled. 15843d052595SHorst Hummel */ 15851da177e4SLinus Torvalds static int 15861da177e4SLinus Torvalds dasd_eckd_check_characteristics(struct dasd_device *device) 15871da177e4SLinus Torvalds { 15881da177e4SLinus Torvalds struct dasd_eckd_private *private; 15898e09f215SStefan Weinhuber struct dasd_block *block; 15902dedf0d9SStefan Haberland struct dasd_uid temp_uid; 15917c8faa86SStefan Haberland int is_known, rc, i; 159233b62a30SStefan Weinhuber int readonly; 15937c8faa86SStefan Haberland unsigned long value; 15941da177e4SLinus Torvalds 1595454e1fa1SPeter Oberparleiter if (!ccw_device_is_pathgroup(device->cdev)) { 1596454e1fa1SPeter Oberparleiter dev_warn(&device->cdev->dev, 1597454e1fa1SPeter Oberparleiter "A channel path group could not be established\n"); 1598454e1fa1SPeter Oberparleiter return -EIO; 1599454e1fa1SPeter Oberparleiter } 1600454e1fa1SPeter Oberparleiter if (!ccw_device_is_multipath(device->cdev)) { 1601454e1fa1SPeter Oberparleiter dev_info(&device->cdev->dev, 1602454e1fa1SPeter Oberparleiter "The DASD is not operating in multipath mode\n"); 1603454e1fa1SPeter Oberparleiter } 16041da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 160592636b15SSebastian Ott if (!private) { 160692636b15SSebastian Ott private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); 160792636b15SSebastian Ott if (!private) { 1608fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1609fc19f381SStefan Haberland "Allocating memory for private DASD data " 1610fc19f381SStefan Haberland "failed\n"); 16111da177e4SLinus Torvalds return -ENOMEM; 16121da177e4SLinus Torvalds } 16131da177e4SLinus Torvalds device->private = (void *) private; 161492636b15SSebastian Ott } else { 161592636b15SSebastian Ott memset(private, 0, sizeof(*private)); 16161da177e4SLinus Torvalds } 16171da177e4SLinus Torvalds /* Invalidate status of initial analysis. */ 16181da177e4SLinus Torvalds private->init_cqr_status = -1; 16191da177e4SLinus Torvalds /* Set default cache operations. */ 16201da177e4SLinus Torvalds private->attrib.operation = DASD_NORMAL_CACHE; 16211da177e4SLinus Torvalds private->attrib.nr_cyl = 0; 16221da177e4SLinus Torvalds 162340545573SHorst Hummel /* Read Configuration Data */ 162440545573SHorst Hummel rc = dasd_eckd_read_conf(device); 162540545573SHorst Hummel if (rc) 16268e09f215SStefan Weinhuber goto out_err1; 162740545573SHorst Hummel 16287c8faa86SStefan Haberland /* set default timeout */ 16297c8faa86SStefan Haberland device->default_expires = DASD_EXPIRES; 16307c8faa86SStefan Haberland if (private->gneq) { 16317c8faa86SStefan Haberland value = 1; 16327c8faa86SStefan Haberland for (i = 0; i < private->gneq->timeout.value; i++) 16337c8faa86SStefan Haberland value = 10 * value; 16347c8faa86SStefan Haberland value = value * private->gneq->timeout.number; 16357c8faa86SStefan Haberland /* do not accept useless values */ 16367c8faa86SStefan Haberland if (value != 0 && value <= DASD_EXPIRES_MAX) 16377c8faa86SStefan Haberland device->default_expires = value; 16387c8faa86SStefan Haberland } 16397c8faa86SStefan Haberland 16402dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 16412dedf0d9SStefan Haberland if (temp_uid.type == UA_BASE_DEVICE) { 16428e09f215SStefan Weinhuber block = dasd_alloc_block(); 16438e09f215SStefan Weinhuber if (IS_ERR(block)) { 1644b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1645b8ed5dd5SStefan Haberland "could not allocate dasd " 1646b8ed5dd5SStefan Haberland "block structure"); 16478e09f215SStefan Weinhuber rc = PTR_ERR(block); 16488e09f215SStefan Weinhuber goto out_err1; 16498e09f215SStefan Weinhuber } 16508e09f215SStefan Weinhuber device->block = block; 16518e09f215SStefan Weinhuber block->base = device; 16528e09f215SStefan Weinhuber } 16538e09f215SStefan Weinhuber 16548e09f215SStefan Weinhuber /* register lcu with alias handling, enable PAV if this is a new lcu */ 16558e09f215SStefan Weinhuber is_known = dasd_alias_make_device_known_to_lcu(device); 16568e09f215SStefan Weinhuber if (is_known < 0) { 16578e09f215SStefan Weinhuber rc = is_known; 16588e09f215SStefan Weinhuber goto out_err2; 16598e09f215SStefan Weinhuber } 1660f4ac1d02SStefan Weinhuber /* 1661817f2c84SNikanth Karthikesan * dasd_eckd_validate_server is done on the first device that 1662f4ac1d02SStefan Weinhuber * is found for an LCU. All later other devices have to wait 1663f4ac1d02SStefan Weinhuber * for it, so they will read the correct feature codes. 1664f4ac1d02SStefan Weinhuber */ 16658e09f215SStefan Weinhuber if (!is_known) { 1666f4ac1d02SStefan Weinhuber dasd_eckd_validate_server(device); 1667f4ac1d02SStefan Weinhuber dasd_alias_lcu_setup_complete(device); 1668f4ac1d02SStefan Weinhuber } else 1669f4ac1d02SStefan Weinhuber dasd_alias_wait_for_lcu_setup(device); 1670f4ac1d02SStefan Weinhuber 1671f4ac1d02SStefan Weinhuber /* device may report different configuration data after LCU setup */ 1672f4ac1d02SStefan Weinhuber rc = dasd_eckd_read_conf(device); 167340545573SHorst Hummel if (rc) 16748e09f215SStefan Weinhuber goto out_err3; 16758e09f215SStefan Weinhuber 16768e09f215SStefan Weinhuber /* Read Feature Codes */ 167768d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 167840545573SHorst Hummel 16791da177e4SLinus Torvalds /* Read Device Characteristics */ 168068b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 168168b781feSStefan Haberland &private->rdc_data, 64); 16828e09f215SStefan Weinhuber if (rc) { 1683b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1684b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 16858e09f215SStefan Weinhuber goto out_err3; 16868e09f215SStefan Weinhuber } 168734cd551aSStefan Haberland 168834cd551aSStefan Haberland if ((device->features & DASD_FEATURE_USERAW) && 168934cd551aSStefan Haberland !(private->rdc_data.facilities.RT_in_LR)) { 169034cd551aSStefan Haberland dev_err(&device->cdev->dev, "The storage server does not " 169134cd551aSStefan Haberland "support raw-track access\n"); 169234cd551aSStefan Haberland rc = -EINVAL; 169334cd551aSStefan Haberland goto out_err3; 169434cd551aSStefan Haberland } 169534cd551aSStefan Haberland 1696817f2c84SNikanth Karthikesan /* find the valid cylinder size */ 1697b44b0ab3SStefan Weinhuber if (private->rdc_data.no_cyl == LV_COMPAT_CYL && 1698b44b0ab3SStefan Weinhuber private->rdc_data.long_no_cyl) 1699b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.long_no_cyl; 1700b44b0ab3SStefan Weinhuber else 1701b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.no_cyl; 1702b44b0ab3SStefan Weinhuber 1703ef19298bSStefan Weinhuber private->fcx_max_data = get_fcx_max_data(device); 1704ef19298bSStefan Weinhuber 170533b62a30SStefan Weinhuber readonly = dasd_device_is_ro(device); 170633b62a30SStefan Weinhuber if (readonly) 170733b62a30SStefan Weinhuber set_bit(DASD_FLAG_DEVICE_RO, &device->flags); 170833b62a30SStefan Weinhuber 1709fc19f381SStefan Haberland dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " 171033b62a30SStefan Weinhuber "with %d cylinders, %d heads, %d sectors%s\n", 17111da177e4SLinus Torvalds private->rdc_data.dev_type, 17121da177e4SLinus Torvalds private->rdc_data.dev_model, 17131da177e4SLinus Torvalds private->rdc_data.cu_type, 17141da177e4SLinus Torvalds private->rdc_data.cu_model.model, 1715b44b0ab3SStefan Weinhuber private->real_cyl, 17161da177e4SLinus Torvalds private->rdc_data.trk_per_cyl, 171733b62a30SStefan Weinhuber private->rdc_data.sec_per_trk, 171833b62a30SStefan Weinhuber readonly ? ", read-only device" : ""); 17198e09f215SStefan Weinhuber return 0; 17208e09f215SStefan Weinhuber 17218e09f215SStefan Weinhuber out_err3: 17228e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 17238e09f215SStefan Weinhuber out_err2: 17248e09f215SStefan Weinhuber dasd_free_block(device->block); 17258e09f215SStefan Weinhuber device->block = NULL; 17268e09f215SStefan Weinhuber out_err1: 17274abb08c2SStefan Weinhuber kfree(private->conf_data); 17288e09f215SStefan Weinhuber kfree(device->private); 17298e09f215SStefan Weinhuber device->private = NULL; 17303d052595SHorst Hummel return rc; 17311da177e4SLinus Torvalds } 17321da177e4SLinus Torvalds 17338e09f215SStefan Weinhuber static void dasd_eckd_uncheck_device(struct dasd_device *device) 17348e09f215SStefan Weinhuber { 17354abb08c2SStefan Weinhuber struct dasd_eckd_private *private; 17364abb08c2SStefan Weinhuber 17374abb08c2SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 17388e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 17394abb08c2SStefan Weinhuber private->ned = NULL; 17404abb08c2SStefan Weinhuber private->sneq = NULL; 17414abb08c2SStefan Weinhuber private->vdsneq = NULL; 17424abb08c2SStefan Weinhuber private->gneq = NULL; 17434abb08c2SStefan Weinhuber private->conf_len = 0; 17444abb08c2SStefan Weinhuber kfree(private->conf_data); 17454abb08c2SStefan Weinhuber private->conf_data = NULL; 17468e09f215SStefan Weinhuber } 17478e09f215SStefan Weinhuber 17481da177e4SLinus Torvalds static struct dasd_ccw_req * 17491da177e4SLinus Torvalds dasd_eckd_analysis_ccw(struct dasd_device *device) 17501da177e4SLinus Torvalds { 17511da177e4SLinus Torvalds struct dasd_eckd_private *private; 17521da177e4SLinus Torvalds struct eckd_count *count_data; 17531da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 17541da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 17551da177e4SLinus Torvalds struct ccw1 *ccw; 17561da177e4SLinus Torvalds int cplength, datasize; 17571da177e4SLinus Torvalds int i; 17581da177e4SLinus Torvalds 17591da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 17601da177e4SLinus Torvalds 17611da177e4SLinus Torvalds cplength = 8; 17621da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 176368b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 17641da177e4SLinus Torvalds if (IS_ERR(cqr)) 17651da177e4SLinus Torvalds return cqr; 17661da177e4SLinus Torvalds ccw = cqr->cpaddr; 17671da177e4SLinus Torvalds /* Define extent for the first 3 tracks. */ 17681da177e4SLinus Torvalds define_extent(ccw++, cqr->data, 0, 2, 17691da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device); 17701da177e4SLinus Torvalds LO_data = cqr->data + sizeof(struct DE_eckd_data); 17711da177e4SLinus Torvalds /* Locate record for the first 4 records on track 0. */ 17721da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 17731da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 0, 0, 4, 17741da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 17751da177e4SLinus Torvalds 17761da177e4SLinus Torvalds count_data = private->count_area; 17771da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 17781da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 17791da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 17801da177e4SLinus Torvalds ccw->flags = 0; 17811da177e4SLinus Torvalds ccw->count = 8; 17821da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 17831da177e4SLinus Torvalds ccw++; 17841da177e4SLinus Torvalds count_data++; 17851da177e4SLinus Torvalds } 17861da177e4SLinus Torvalds 17871da177e4SLinus Torvalds /* Locate record for the first record on track 2. */ 17881da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 17891da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 2, 0, 1, 17901da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 17911da177e4SLinus Torvalds /* Read count ccw. */ 17921da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 17931da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 17941da177e4SLinus Torvalds ccw->flags = 0; 17951da177e4SLinus Torvalds ccw->count = 8; 17961da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 17971da177e4SLinus Torvalds 17988e09f215SStefan Weinhuber cqr->block = NULL; 17998e09f215SStefan Weinhuber cqr->startdev = device; 18008e09f215SStefan Weinhuber cqr->memdev = device; 1801eb6e199bSStefan Weinhuber cqr->retries = 255; 18021da177e4SLinus Torvalds cqr->buildclk = get_clock(); 18031da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 18041da177e4SLinus Torvalds return cqr; 18051da177e4SLinus Torvalds } 18061da177e4SLinus Torvalds 1807eb6e199bSStefan Weinhuber /* differentiate between 'no record found' and any other error */ 1808eb6e199bSStefan Weinhuber static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) 1809eb6e199bSStefan Weinhuber { 1810eb6e199bSStefan Weinhuber char *sense; 1811eb6e199bSStefan Weinhuber if (init_cqr->status == DASD_CQR_DONE) 1812eb6e199bSStefan Weinhuber return INIT_CQR_OK; 1813eb6e199bSStefan Weinhuber else if (init_cqr->status == DASD_CQR_NEED_ERP || 1814eb6e199bSStefan Weinhuber init_cqr->status == DASD_CQR_FAILED) { 1815eb6e199bSStefan Weinhuber sense = dasd_get_sense(&init_cqr->irb); 1816eb6e199bSStefan Weinhuber if (sense && (sense[1] & SNS1_NO_REC_FOUND)) 1817eb6e199bSStefan Weinhuber return INIT_CQR_UNFORMATTED; 1818eb6e199bSStefan Weinhuber else 1819eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 1820eb6e199bSStefan Weinhuber } else 1821eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 1822eb6e199bSStefan Weinhuber } 1823eb6e199bSStefan Weinhuber 18241da177e4SLinus Torvalds /* 18251da177e4SLinus Torvalds * This is the callback function for the init_analysis cqr. It saves 18261da177e4SLinus Torvalds * the status of the initial analysis ccw before it frees it and kicks 18271da177e4SLinus Torvalds * the device to continue the startup sequence. This will call 18281da177e4SLinus Torvalds * dasd_eckd_do_analysis again (if the devices has not been marked 18291da177e4SLinus Torvalds * for deletion in the meantime). 18301da177e4SLinus Torvalds */ 1831eb6e199bSStefan Weinhuber static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, 1832eb6e199bSStefan Weinhuber void *data) 18331da177e4SLinus Torvalds { 18341da177e4SLinus Torvalds struct dasd_eckd_private *private; 18351da177e4SLinus Torvalds struct dasd_device *device; 18361da177e4SLinus Torvalds 18378e09f215SStefan Weinhuber device = init_cqr->startdev; 18381da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 1839eb6e199bSStefan Weinhuber private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); 18401da177e4SLinus Torvalds dasd_sfree_request(init_cqr, device); 18411da177e4SLinus Torvalds dasd_kick_device(device); 18421da177e4SLinus Torvalds } 18431da177e4SLinus Torvalds 1844eb6e199bSStefan Weinhuber static int dasd_eckd_start_analysis(struct dasd_block *block) 18451da177e4SLinus Torvalds { 18461da177e4SLinus Torvalds struct dasd_ccw_req *init_cqr; 18471da177e4SLinus Torvalds 18488e09f215SStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(block->base); 18491da177e4SLinus Torvalds if (IS_ERR(init_cqr)) 18501da177e4SLinus Torvalds return PTR_ERR(init_cqr); 18511da177e4SLinus Torvalds init_cqr->callback = dasd_eckd_analysis_callback; 18521da177e4SLinus Torvalds init_cqr->callback_data = NULL; 18531da177e4SLinus Torvalds init_cqr->expires = 5*HZ; 1854eb6e199bSStefan Weinhuber /* first try without ERP, so we can later handle unformatted 1855eb6e199bSStefan Weinhuber * devices as special case 1856eb6e199bSStefan Weinhuber */ 1857eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); 1858eb6e199bSStefan Weinhuber init_cqr->retries = 0; 18591da177e4SLinus Torvalds dasd_add_request_head(init_cqr); 18601da177e4SLinus Torvalds return -EAGAIN; 18611da177e4SLinus Torvalds } 18621da177e4SLinus Torvalds 1863eb6e199bSStefan Weinhuber static int dasd_eckd_end_analysis(struct dasd_block *block) 18641da177e4SLinus Torvalds { 18658e09f215SStefan Weinhuber struct dasd_device *device; 18661da177e4SLinus Torvalds struct dasd_eckd_private *private; 18671da177e4SLinus Torvalds struct eckd_count *count_area; 18681da177e4SLinus Torvalds unsigned int sb, blk_per_trk; 18691da177e4SLinus Torvalds int status, i; 1870eb6e199bSStefan Weinhuber struct dasd_ccw_req *init_cqr; 18711da177e4SLinus Torvalds 18728e09f215SStefan Weinhuber device = block->base; 18731da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 18741da177e4SLinus Torvalds status = private->init_cqr_status; 18751da177e4SLinus Torvalds private->init_cqr_status = -1; 1876eb6e199bSStefan Weinhuber if (status == INIT_CQR_ERROR) { 1877eb6e199bSStefan Weinhuber /* try again, this time with full ERP */ 1878eb6e199bSStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(device); 1879eb6e199bSStefan Weinhuber dasd_sleep_on(init_cqr); 1880eb6e199bSStefan Weinhuber status = dasd_eckd_analysis_evaluation(init_cqr); 1881eb6e199bSStefan Weinhuber dasd_sfree_request(init_cqr, device); 1882eb6e199bSStefan Weinhuber } 1883eb6e199bSStefan Weinhuber 1884e4dbb0f2SStefan Haberland if (device->features & DASD_FEATURE_USERAW) { 1885e4dbb0f2SStefan Haberland block->bp_block = DASD_RAW_BLOCKSIZE; 1886e4dbb0f2SStefan Haberland blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; 1887e4dbb0f2SStefan Haberland block->s2b_shift = 3; 1888e4dbb0f2SStefan Haberland goto raw; 1889e4dbb0f2SStefan Haberland } 1890e4dbb0f2SStefan Haberland 1891eb6e199bSStefan Weinhuber if (status == INIT_CQR_UNFORMATTED) { 1892eb6e199bSStefan Weinhuber dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); 18931da177e4SLinus Torvalds return -EMEDIUMTYPE; 1894eb6e199bSStefan Weinhuber } else if (status == INIT_CQR_ERROR) { 1895eb6e199bSStefan Weinhuber dev_err(&device->cdev->dev, 1896eb6e199bSStefan Weinhuber "Detecting the DASD disk layout failed because " 1897eb6e199bSStefan Weinhuber "of an I/O error\n"); 1898eb6e199bSStefan Weinhuber return -EIO; 18991da177e4SLinus Torvalds } 19001da177e4SLinus Torvalds 19011da177e4SLinus Torvalds private->uses_cdl = 1; 19021da177e4SLinus Torvalds /* Check Track 0 for Compatible Disk Layout */ 19031da177e4SLinus Torvalds count_area = NULL; 19041da177e4SLinus Torvalds for (i = 0; i < 3; i++) { 19051da177e4SLinus Torvalds if (private->count_area[i].kl != 4 || 19061da177e4SLinus Torvalds private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4) { 19071da177e4SLinus Torvalds private->uses_cdl = 0; 19081da177e4SLinus Torvalds break; 19091da177e4SLinus Torvalds } 19101da177e4SLinus Torvalds } 19111da177e4SLinus Torvalds if (i == 3) 19121da177e4SLinus Torvalds count_area = &private->count_area[4]; 19131da177e4SLinus Torvalds 19141da177e4SLinus Torvalds if (private->uses_cdl == 0) { 19151da177e4SLinus Torvalds for (i = 0; i < 5; i++) { 19161da177e4SLinus Torvalds if ((private->count_area[i].kl != 0) || 19171da177e4SLinus Torvalds (private->count_area[i].dl != 19181da177e4SLinus Torvalds private->count_area[0].dl)) 19191da177e4SLinus Torvalds break; 19201da177e4SLinus Torvalds } 19211da177e4SLinus Torvalds if (i == 5) 19221da177e4SLinus Torvalds count_area = &private->count_area[0]; 19231da177e4SLinus Torvalds } else { 19241da177e4SLinus Torvalds if (private->count_area[3].record == 1) 1925fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1926fc19f381SStefan Haberland "Track 0 has no records following the VTOC\n"); 19271da177e4SLinus Torvalds } 1928e4dbb0f2SStefan Haberland 19291da177e4SLinus Torvalds if (count_area != NULL && count_area->kl == 0) { 19301da177e4SLinus Torvalds /* we found notthing violating our disk layout */ 19311da177e4SLinus Torvalds if (dasd_check_blocksize(count_area->dl) == 0) 19328e09f215SStefan Weinhuber block->bp_block = count_area->dl; 19331da177e4SLinus Torvalds } 19348e09f215SStefan Weinhuber if (block->bp_block == 0) { 1935fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1936fc19f381SStefan Haberland "The disk layout of the DASD is not supported\n"); 19371da177e4SLinus Torvalds return -EMEDIUMTYPE; 19381da177e4SLinus Torvalds } 19398e09f215SStefan Weinhuber block->s2b_shift = 0; /* bits to shift 512 to get a block */ 19408e09f215SStefan Weinhuber for (sb = 512; sb < block->bp_block; sb = sb << 1) 19418e09f215SStefan Weinhuber block->s2b_shift++; 19421da177e4SLinus Torvalds 19438e09f215SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 1944e4dbb0f2SStefan Haberland 1945e4dbb0f2SStefan Haberland raw: 1946b44b0ab3SStefan Weinhuber block->blocks = (private->real_cyl * 19471da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 19481da177e4SLinus Torvalds blk_per_trk); 19491da177e4SLinus Torvalds 1950fc19f381SStefan Haberland dev_info(&device->cdev->dev, 1951fc19f381SStefan Haberland "DASD with %d KB/block, %d KB total size, %d KB/track, " 1952fc19f381SStefan Haberland "%s\n", (block->bp_block >> 10), 1953b44b0ab3SStefan Weinhuber ((private->real_cyl * 19541da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 19558e09f215SStefan Weinhuber blk_per_trk * (block->bp_block >> 9)) >> 1), 19568e09f215SStefan Weinhuber ((blk_per_trk * block->bp_block) >> 10), 19571da177e4SLinus Torvalds private->uses_cdl ? 19581da177e4SLinus Torvalds "compatible disk layout" : "linux disk layout"); 19591da177e4SLinus Torvalds 19601da177e4SLinus Torvalds return 0; 19611da177e4SLinus Torvalds } 19621da177e4SLinus Torvalds 19638e09f215SStefan Weinhuber static int dasd_eckd_do_analysis(struct dasd_block *block) 19641da177e4SLinus Torvalds { 19651da177e4SLinus Torvalds struct dasd_eckd_private *private; 19661da177e4SLinus Torvalds 19678e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 19681da177e4SLinus Torvalds if (private->init_cqr_status < 0) 19698e09f215SStefan Weinhuber return dasd_eckd_start_analysis(block); 19701da177e4SLinus Torvalds else 19718e09f215SStefan Weinhuber return dasd_eckd_end_analysis(block); 19721da177e4SLinus Torvalds } 19731da177e4SLinus Torvalds 19748e09f215SStefan Weinhuber static int dasd_eckd_ready_to_online(struct dasd_device *device) 19758e09f215SStefan Weinhuber { 19768e09f215SStefan Weinhuber return dasd_alias_add_device(device); 19778e09f215SStefan Weinhuber }; 19788e09f215SStefan Weinhuber 19798e09f215SStefan Weinhuber static int dasd_eckd_online_to_ready(struct dasd_device *device) 19808e09f215SStefan Weinhuber { 1981501183f2SStefan Haberland cancel_work_sync(&device->reload_device); 19828e09f215SStefan Weinhuber return dasd_alias_remove_device(device); 19838e09f215SStefan Weinhuber }; 19848e09f215SStefan Weinhuber 19851da177e4SLinus Torvalds static int 19868e09f215SStefan Weinhuber dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 19871da177e4SLinus Torvalds { 19881da177e4SLinus Torvalds struct dasd_eckd_private *private; 19891da177e4SLinus Torvalds 19908e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 19918e09f215SStefan Weinhuber if (dasd_check_blocksize(block->bp_block) == 0) { 19921da177e4SLinus Torvalds geo->sectors = recs_per_track(&private->rdc_data, 19938e09f215SStefan Weinhuber 0, block->bp_block); 19941da177e4SLinus Torvalds } 19951da177e4SLinus Torvalds geo->cylinders = private->rdc_data.no_cyl; 19961da177e4SLinus Torvalds geo->heads = private->rdc_data.trk_per_cyl; 19971da177e4SLinus Torvalds return 0; 19981da177e4SLinus Torvalds } 19991da177e4SLinus Torvalds 20001da177e4SLinus Torvalds static struct dasd_ccw_req * 20011da177e4SLinus Torvalds dasd_eckd_format_device(struct dasd_device * device, 20021da177e4SLinus Torvalds struct format_data_t * fdata) 20031da177e4SLinus Torvalds { 20041da177e4SLinus Torvalds struct dasd_eckd_private *private; 20051da177e4SLinus Torvalds struct dasd_ccw_req *fcp; 20061da177e4SLinus Torvalds struct eckd_count *ect; 20071da177e4SLinus Torvalds struct ccw1 *ccw; 20081da177e4SLinus Torvalds void *data; 2009b44b0ab3SStefan Weinhuber int rpt; 2010b44b0ab3SStefan Weinhuber struct ch_t address; 20111da177e4SLinus Torvalds int cplength, datasize; 20121da177e4SLinus Torvalds int i; 2013f9a28f7bSJean-Baptiste Joret int intensity = 0; 2014f9a28f7bSJean-Baptiste Joret int r0_perm; 20151da177e4SLinus Torvalds 20161da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 20171da177e4SLinus Torvalds rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize); 2018b44b0ab3SStefan Weinhuber set_ch_t(&address, 2019b44b0ab3SStefan Weinhuber fdata->start_unit / private->rdc_data.trk_per_cyl, 2020b44b0ab3SStefan Weinhuber fdata->start_unit % private->rdc_data.trk_per_cyl); 20211da177e4SLinus Torvalds 20221da177e4SLinus Torvalds /* Sanity checks. */ 20231da177e4SLinus Torvalds if (fdata->start_unit >= 2024b44b0ab3SStefan Weinhuber (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2025fc19f381SStefan Haberland dev_warn(&device->cdev->dev, "Start track number %d used in " 2026fc19f381SStefan Haberland "formatting is too big\n", fdata->start_unit); 20271da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 20281da177e4SLinus Torvalds } 20291da177e4SLinus Torvalds if (fdata->start_unit > fdata->stop_unit) { 2030fc19f381SStefan Haberland dev_warn(&device->cdev->dev, "Start track %d used in " 2031fc19f381SStefan Haberland "formatting exceeds end track\n", fdata->start_unit); 20321da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 20331da177e4SLinus Torvalds } 20341da177e4SLinus Torvalds if (dasd_check_blocksize(fdata->blksize) != 0) { 2035fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 2036fc19f381SStefan Haberland "The DASD cannot be formatted with block size %d\n", 20371da177e4SLinus Torvalds fdata->blksize); 20381da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 20391da177e4SLinus Torvalds } 20401da177e4SLinus Torvalds 20411da177e4SLinus Torvalds /* 20421da177e4SLinus Torvalds * fdata->intensity is a bit string that tells us what to do: 20431da177e4SLinus Torvalds * Bit 0: write record zero 20441da177e4SLinus Torvalds * Bit 1: write home address, currently not supported 20451da177e4SLinus Torvalds * Bit 2: invalidate tracks 20461da177e4SLinus Torvalds * Bit 3: use OS/390 compatible disk layout (cdl) 2047f9a28f7bSJean-Baptiste Joret * Bit 4: do not allow storage subsystem to modify record zero 20481da177e4SLinus Torvalds * Only some bit combinations do make sense. 20491da177e4SLinus Torvalds */ 2050f9a28f7bSJean-Baptiste Joret if (fdata->intensity & 0x10) { 2051f9a28f7bSJean-Baptiste Joret r0_perm = 0; 2052f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity & ~0x10; 2053f9a28f7bSJean-Baptiste Joret } else { 2054f9a28f7bSJean-Baptiste Joret r0_perm = 1; 2055f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity; 2056f9a28f7bSJean-Baptiste Joret } 2057f9a28f7bSJean-Baptiste Joret switch (intensity) { 20581da177e4SLinus Torvalds case 0x00: /* Normal format */ 20591da177e4SLinus Torvalds case 0x08: /* Normal format, use cdl. */ 20601da177e4SLinus Torvalds cplength = 2 + rpt; 20611da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 20621da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 20631da177e4SLinus Torvalds rpt * sizeof(struct eckd_count); 20641da177e4SLinus Torvalds break; 20651da177e4SLinus Torvalds case 0x01: /* Write record zero and format track. */ 20661da177e4SLinus Torvalds case 0x09: /* Write record zero and format track, use cdl. */ 20671da177e4SLinus Torvalds cplength = 3 + rpt; 20681da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 20691da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 20701da177e4SLinus Torvalds sizeof(struct eckd_count) + 20711da177e4SLinus Torvalds rpt * sizeof(struct eckd_count); 20721da177e4SLinus Torvalds break; 20731da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 20741da177e4SLinus Torvalds case 0x0c: /* Invalidate track, use cdl. */ 20751da177e4SLinus Torvalds cplength = 3; 20761da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 20771da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 20781da177e4SLinus Torvalds sizeof(struct eckd_count); 20791da177e4SLinus Torvalds break; 20801da177e4SLinus Torvalds default: 2081fc19f381SStefan Haberland dev_warn(&device->cdev->dev, "An I/O control call used " 2082fc19f381SStefan Haberland "incorrect flags 0x%x\n", fdata->intensity); 20831da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 20841da177e4SLinus Torvalds } 20851da177e4SLinus Torvalds /* Allocate the format ccw request. */ 208668b781feSStefan Haberland fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 20871da177e4SLinus Torvalds if (IS_ERR(fcp)) 20881da177e4SLinus Torvalds return fcp; 20891da177e4SLinus Torvalds 20901da177e4SLinus Torvalds data = fcp->data; 20911da177e4SLinus Torvalds ccw = fcp->cpaddr; 20921da177e4SLinus Torvalds 2093f9a28f7bSJean-Baptiste Joret switch (intensity & ~0x08) { 20941da177e4SLinus Torvalds case 0x00: /* Normal format. */ 20951da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 20961da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 20971da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device); 2098f9a28f7bSJean-Baptiste Joret /* grant subsystem permission to format R0 */ 2099f9a28f7bSJean-Baptiste Joret if (r0_perm) 2100f9a28f7bSJean-Baptiste Joret ((struct DE_eckd_data *)data)->ga_extended |= 0x04; 21011da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 21021da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 21031da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 21041da177e4SLinus Torvalds fdata->start_unit, 0, rpt, 21051da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device, 21061da177e4SLinus Torvalds fdata->blksize); 21071da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 21081da177e4SLinus Torvalds break; 21091da177e4SLinus Torvalds case 0x01: /* Write record zero + format track. */ 21101da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 21111da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 21121da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, 21131da177e4SLinus Torvalds device); 21141da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 21151da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 21161da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 21171da177e4SLinus Torvalds fdata->start_unit, 0, rpt + 1, 21181da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, device, 21198e09f215SStefan Weinhuber device->block->bp_block); 21201da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 21211da177e4SLinus Torvalds break; 21221da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 21231da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 21241da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 21251da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device); 21261da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 21271da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 21281da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 21291da177e4SLinus Torvalds fdata->start_unit, 0, 1, 21301da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device, 8); 21311da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 21321da177e4SLinus Torvalds break; 21331da177e4SLinus Torvalds } 2134f9a28f7bSJean-Baptiste Joret if (intensity & 0x01) { /* write record zero */ 21351da177e4SLinus Torvalds ect = (struct eckd_count *) data; 21361da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2137b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2138b44b0ab3SStefan Weinhuber ect->head = address.head; 21391da177e4SLinus Torvalds ect->record = 0; 21401da177e4SLinus Torvalds ect->kl = 0; 21411da177e4SLinus Torvalds ect->dl = 8; 21421da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 21431da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 21441da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 21451da177e4SLinus Torvalds ccw->count = 8; 21461da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 21471da177e4SLinus Torvalds ccw++; 21481da177e4SLinus Torvalds } 2149f9a28f7bSJean-Baptiste Joret if ((intensity & ~0x08) & 0x04) { /* erase track */ 21501da177e4SLinus Torvalds ect = (struct eckd_count *) data; 21511da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2152b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2153b44b0ab3SStefan Weinhuber ect->head = address.head; 21541da177e4SLinus Torvalds ect->record = 1; 21551da177e4SLinus Torvalds ect->kl = 0; 21561da177e4SLinus Torvalds ect->dl = 0; 21571da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 21581da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 21591da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 21601da177e4SLinus Torvalds ccw->count = 8; 21611da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 21621da177e4SLinus Torvalds } else { /* write remaining records */ 21631da177e4SLinus Torvalds for (i = 0; i < rpt; i++) { 21641da177e4SLinus Torvalds ect = (struct eckd_count *) data; 21651da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2166b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2167b44b0ab3SStefan Weinhuber ect->head = address.head; 21681da177e4SLinus Torvalds ect->record = i + 1; 21691da177e4SLinus Torvalds ect->kl = 0; 21701da177e4SLinus Torvalds ect->dl = fdata->blksize; 21711da177e4SLinus Torvalds /* Check for special tracks 0-1 when formatting CDL */ 2172f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 21731da177e4SLinus Torvalds fdata->start_unit == 0) { 21741da177e4SLinus Torvalds if (i < 3) { 21751da177e4SLinus Torvalds ect->kl = 4; 21761da177e4SLinus Torvalds ect->dl = sizes_trk0[i] - 4; 21771da177e4SLinus Torvalds } 21781da177e4SLinus Torvalds } 2179f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 21801da177e4SLinus Torvalds fdata->start_unit == 1) { 21811da177e4SLinus Torvalds ect->kl = 44; 21821da177e4SLinus Torvalds ect->dl = LABEL_SIZE - 44; 21831da177e4SLinus Torvalds } 21841da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 21851da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 21861da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 21871da177e4SLinus Torvalds ccw->count = 8; 21881da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 21891da177e4SLinus Torvalds ccw++; 21901da177e4SLinus Torvalds } 21911da177e4SLinus Torvalds } 21928e09f215SStefan Weinhuber fcp->startdev = device; 21938e09f215SStefan Weinhuber fcp->memdev = device; 2194eb6e199bSStefan Weinhuber fcp->retries = 256; 21951da177e4SLinus Torvalds fcp->buildclk = get_clock(); 21961da177e4SLinus Torvalds fcp->status = DASD_CQR_FILLED; 21971da177e4SLinus Torvalds return fcp; 21981da177e4SLinus Torvalds } 21991da177e4SLinus Torvalds 22008e09f215SStefan Weinhuber static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 22011da177e4SLinus Torvalds { 22028e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 22038e09f215SStefan Weinhuber if (cqr->block && (cqr->startdev != cqr->block->base)) { 22048e09f215SStefan Weinhuber dasd_eckd_reset_ccw_to_base_io(cqr); 22058e09f215SStefan Weinhuber cqr->startdev = cqr->block->base; 2206a4d26c6aSStefan Weinhuber cqr->lpm = cqr->block->base->path_data.opm; 22071da177e4SLinus Torvalds } 22088e09f215SStefan Weinhuber }; 22091da177e4SLinus Torvalds 22101da177e4SLinus Torvalds static dasd_erp_fn_t 22111da177e4SLinus Torvalds dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 22121da177e4SLinus Torvalds { 22138e09f215SStefan Weinhuber struct dasd_device *device = (struct dasd_device *) cqr->startdev; 22141da177e4SLinus Torvalds struct ccw_device *cdev = device->cdev; 22151da177e4SLinus Torvalds 22161da177e4SLinus Torvalds switch (cdev->id.cu_type) { 22171da177e4SLinus Torvalds case 0x3990: 22181da177e4SLinus Torvalds case 0x2105: 22191da177e4SLinus Torvalds case 0x2107: 22201da177e4SLinus Torvalds case 0x1750: 22211da177e4SLinus Torvalds return dasd_3990_erp_action; 22221da177e4SLinus Torvalds case 0x9343: 22231da177e4SLinus Torvalds case 0x3880: 22241da177e4SLinus Torvalds default: 22251da177e4SLinus Torvalds return dasd_default_erp_action; 22261da177e4SLinus Torvalds } 22271da177e4SLinus Torvalds } 22281da177e4SLinus Torvalds 22291da177e4SLinus Torvalds static dasd_erp_fn_t 22301da177e4SLinus Torvalds dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 22311da177e4SLinus Torvalds { 22321da177e4SLinus Torvalds return dasd_default_erp_postaction; 22331da177e4SLinus Torvalds } 22341da177e4SLinus Torvalds 22355a27e60dSStefan Weinhuber static void dasd_eckd_check_for_device_change(struct dasd_device *device, 22365a27e60dSStefan Weinhuber struct dasd_ccw_req *cqr, 22378e09f215SStefan Weinhuber struct irb *irb) 22388e09f215SStefan Weinhuber { 22398e09f215SStefan Weinhuber char mask; 2240f3eb5384SStefan Weinhuber char *sense = NULL; 2241501183f2SStefan Haberland struct dasd_eckd_private *private; 22428e09f215SStefan Weinhuber 2243501183f2SStefan Haberland private = (struct dasd_eckd_private *) device->private; 22448e09f215SStefan Weinhuber /* first of all check for state change pending interrupt */ 22458e09f215SStefan Weinhuber mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 2246f3eb5384SStefan Weinhuber if ((scsw_dstat(&irb->scsw) & mask) == mask) { 2247c8d1c0ffSStefan Haberland /* 2248c8d1c0ffSStefan Haberland * for alias only, not in offline processing 2249c8d1c0ffSStefan Haberland * and only if not suspended 2250c8d1c0ffSStefan Haberland */ 2251501183f2SStefan Haberland if (!device->block && private->lcu && 2252c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_OFFLINE, &device->flags) && 2253c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 2254501183f2SStefan Haberland /* 2255501183f2SStefan Haberland * the state change could be caused by an alias 2256501183f2SStefan Haberland * reassignment remove device from alias handling 2257501183f2SStefan Haberland * to prevent new requests from being scheduled on 2258501183f2SStefan Haberland * the wrong alias device 2259501183f2SStefan Haberland */ 2260501183f2SStefan Haberland dasd_alias_remove_device(device); 2261501183f2SStefan Haberland 2262501183f2SStefan Haberland /* schedule worker to reload device */ 2263501183f2SStefan Haberland dasd_reload_device(device); 2264501183f2SStefan Haberland } 22658e09f215SStefan Weinhuber dasd_generic_handle_state_change(device); 22668e09f215SStefan Weinhuber return; 22678e09f215SStefan Weinhuber } 22688e09f215SStefan Weinhuber 2269a5a0061fSStefan Weinhuber sense = dasd_get_sense(irb); 22705a27e60dSStefan Weinhuber if (!sense) 22715a27e60dSStefan Weinhuber return; 22725a27e60dSStefan Weinhuber 22735a27e60dSStefan Weinhuber /* summary unit check */ 2274c7a29e56SStefan Weinhuber if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) && 2275a5a0061fSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { 22768e09f215SStefan Weinhuber dasd_alias_handle_summary_unit_check(device, irb); 22778e09f215SStefan Weinhuber return; 22788e09f215SStefan Weinhuber } 22798e09f215SStefan Weinhuber 2280f60c768cSStefan Haberland /* service information message SIM */ 22815a27e60dSStefan Weinhuber if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && 2282f3eb5384SStefan Weinhuber ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 2283f3eb5384SStefan Weinhuber dasd_3990_erp_handle_sim(device, sense); 2284f60c768cSStefan Haberland return; 2285f60c768cSStefan Haberland } 2286f60c768cSStefan Haberland 22875a27e60dSStefan Weinhuber /* loss of device reservation is handled via base devices only 22885a27e60dSStefan Weinhuber * as alias devices may be used with several bases 22895a27e60dSStefan Weinhuber */ 2290c7a29e56SStefan Weinhuber if (device->block && (sense[27] & DASD_SENSE_BIT_0) && 2291c7a29e56SStefan Weinhuber (sense[7] == 0x3F) && 22925a27e60dSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && 22935a27e60dSStefan Weinhuber test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { 22945a27e60dSStefan Weinhuber if (device->features & DASD_FEATURE_FAILONSLCK) 22955a27e60dSStefan Weinhuber set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); 22965a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 22975a27e60dSStefan Weinhuber dev_err(&device->cdev->dev, 22985a27e60dSStefan Weinhuber "The device reservation was lost\n"); 2299ada3df91SStefan Haberland } 23005a27e60dSStefan Weinhuber } 2301f3eb5384SStefan Weinhuber 2302f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( 2303f3eb5384SStefan Weinhuber struct dasd_device *startdev, 23048e09f215SStefan Weinhuber struct dasd_block *block, 2305f3eb5384SStefan Weinhuber struct request *req, 2306f3eb5384SStefan Weinhuber sector_t first_rec, 2307f3eb5384SStefan Weinhuber sector_t last_rec, 2308f3eb5384SStefan Weinhuber sector_t first_trk, 2309f3eb5384SStefan Weinhuber sector_t last_trk, 2310f3eb5384SStefan Weinhuber unsigned int first_offs, 2311f3eb5384SStefan Weinhuber unsigned int last_offs, 2312f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 2313f3eb5384SStefan Weinhuber unsigned int blksize) 23141da177e4SLinus Torvalds { 23151da177e4SLinus Torvalds struct dasd_eckd_private *private; 23161da177e4SLinus Torvalds unsigned long *idaws; 23171da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 23181da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 23191da177e4SLinus Torvalds struct ccw1 *ccw; 23205705f702SNeilBrown struct req_iterator iter; 23211da177e4SLinus Torvalds struct bio_vec *bv; 23221da177e4SLinus Torvalds char *dst; 2323f3eb5384SStefan Weinhuber unsigned int off; 23241da177e4SLinus Torvalds int count, cidaw, cplength, datasize; 2325f3eb5384SStefan Weinhuber sector_t recid; 23261da177e4SLinus Torvalds unsigned char cmd, rcmd; 23278e09f215SStefan Weinhuber int use_prefix; 23288e09f215SStefan Weinhuber struct dasd_device *basedev; 23291da177e4SLinus Torvalds 23308e09f215SStefan Weinhuber basedev = block->base; 23318e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 23321da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 23331da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_READ_MT; 23341da177e4SLinus Torvalds else if (rq_data_dir(req) == WRITE) 23351da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_WRITE_MT; 23361da177e4SLinus Torvalds else 23371da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 2338f3eb5384SStefan Weinhuber 23391da177e4SLinus Torvalds /* Check struct bio and count the number of blocks for the request. */ 23401da177e4SLinus Torvalds count = 0; 23411da177e4SLinus Torvalds cidaw = 0; 23425705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 23431da177e4SLinus Torvalds if (bv->bv_len & (blksize - 1)) 23441da177e4SLinus Torvalds /* Eckd can only do full blocks. */ 23451da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 23468e09f215SStefan Weinhuber count += bv->bv_len >> (block->s2b_shift + 9); 2347347a8dc3SMartin Schwidefsky #if defined(CONFIG_64BIT) 23486c92e699SJens Axboe if (idal_is_needed (page_address(bv->bv_page), bv->bv_len)) 23498e09f215SStefan Weinhuber cidaw += bv->bv_len >> (block->s2b_shift + 9); 23501da177e4SLinus Torvalds #endif 23511da177e4SLinus Torvalds } 23521da177e4SLinus Torvalds /* Paranoia. */ 23531da177e4SLinus Torvalds if (count != last_rec - first_rec + 1) 23541da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 23558e09f215SStefan Weinhuber 23568e09f215SStefan Weinhuber /* use the prefix command if available */ 23578e09f215SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 23588e09f215SStefan Weinhuber if (use_prefix) { 23598e09f215SStefan Weinhuber /* 1x prefix + number of blocks */ 23608e09f215SStefan Weinhuber cplength = 2 + count; 23618e09f215SStefan Weinhuber /* 1x prefix + cidaws*sizeof(long) */ 23628e09f215SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 23638e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 23648e09f215SStefan Weinhuber cidaw * sizeof(unsigned long); 23658e09f215SStefan Weinhuber } else { 23661da177e4SLinus Torvalds /* 1x define extent + 1x locate record + number of blocks */ 23671da177e4SLinus Torvalds cplength = 2 + count; 23681da177e4SLinus Torvalds /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 23698e09f215SStefan Weinhuber datasize = sizeof(struct DE_eckd_data) + 23708e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 23711da177e4SLinus Torvalds cidaw * sizeof(unsigned long); 23728e09f215SStefan Weinhuber } 23731da177e4SLinus Torvalds /* Find out the number of additional locate record ccws for cdl. */ 23741da177e4SLinus Torvalds if (private->uses_cdl && first_rec < 2*blk_per_trk) { 23751da177e4SLinus Torvalds if (last_rec >= 2*blk_per_trk) 23761da177e4SLinus Torvalds count = 2*blk_per_trk - first_rec; 23771da177e4SLinus Torvalds cplength += count; 23781da177e4SLinus Torvalds datasize += count*sizeof(struct LO_eckd_data); 23791da177e4SLinus Torvalds } 23801da177e4SLinus Torvalds /* Allocate the ccw request. */ 238168b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 238268b781feSStefan Haberland startdev); 23831da177e4SLinus Torvalds if (IS_ERR(cqr)) 23841da177e4SLinus Torvalds return cqr; 23851da177e4SLinus Torvalds ccw = cqr->cpaddr; 23868e09f215SStefan Weinhuber /* First ccw is define extent or prefix. */ 23878e09f215SStefan Weinhuber if (use_prefix) { 23888e09f215SStefan Weinhuber if (prefix(ccw++, cqr->data, first_trk, 23898e09f215SStefan Weinhuber last_trk, cmd, basedev, startdev) == -EAGAIN) { 23908e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 23918e09f215SStefan Weinhuber * Try again later. 23928e09f215SStefan Weinhuber */ 23938e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2394d54853efSMartin Schwidefsky return ERR_PTR(-EAGAIN); 2395d54853efSMartin Schwidefsky } 23968e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 23978e09f215SStefan Weinhuber sizeof(struct PFX_eckd_data)); 23988e09f215SStefan Weinhuber } else { 23998e09f215SStefan Weinhuber if (define_extent(ccw++, cqr->data, first_trk, 24008e09f215SStefan Weinhuber last_trk, cmd, startdev) == -EAGAIN) { 24018e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 24028e09f215SStefan Weinhuber * Try again later. 24038e09f215SStefan Weinhuber */ 24048e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 24058e09f215SStefan Weinhuber return ERR_PTR(-EAGAIN); 24068e09f215SStefan Weinhuber } 24078e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 24088e09f215SStefan Weinhuber sizeof(struct DE_eckd_data)); 24098e09f215SStefan Weinhuber } 24101da177e4SLinus Torvalds /* Build locate_record+read/write/ccws. */ 24111da177e4SLinus Torvalds LO_data = (struct LO_eckd_data *) (idaws + cidaw); 24121da177e4SLinus Torvalds recid = first_rec; 24131da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 24141da177e4SLinus Torvalds /* Only standard blocks so there is just one locate record. */ 24151da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 24161da177e4SLinus Torvalds locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 24178e09f215SStefan Weinhuber last_rec - recid + 1, cmd, basedev, blksize); 24181da177e4SLinus Torvalds } 24195705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 24201da177e4SLinus Torvalds dst = page_address(bv->bv_page) + bv->bv_offset; 24211da177e4SLinus Torvalds if (dasd_page_cache) { 24221da177e4SLinus Torvalds char *copy = kmem_cache_alloc(dasd_page_cache, 2423441e143eSChristoph Lameter GFP_DMA | __GFP_NOWARN); 24241da177e4SLinus Torvalds if (copy && rq_data_dir(req) == WRITE) 24251da177e4SLinus Torvalds memcpy(copy + bv->bv_offset, dst, bv->bv_len); 24261da177e4SLinus Torvalds if (copy) 24271da177e4SLinus Torvalds dst = copy + bv->bv_offset; 24281da177e4SLinus Torvalds } 24291da177e4SLinus Torvalds for (off = 0; off < bv->bv_len; off += blksize) { 24301da177e4SLinus Torvalds sector_t trkid = recid; 24311da177e4SLinus Torvalds unsigned int recoffs = sector_div(trkid, blk_per_trk); 24321da177e4SLinus Torvalds rcmd = cmd; 24331da177e4SLinus Torvalds count = blksize; 24341da177e4SLinus Torvalds /* Locate record for cdl special block ? */ 24351da177e4SLinus Torvalds if (private->uses_cdl && recid < 2*blk_per_trk) { 24361da177e4SLinus Torvalds if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 24371da177e4SLinus Torvalds rcmd |= 0x8; 24381da177e4SLinus Torvalds count = dasd_eckd_cdl_reclen(recid); 2439ec5883abSHorst Hummel if (count < blksize && 2440ec5883abSHorst Hummel rq_data_dir(req) == READ) 24411da177e4SLinus Torvalds memset(dst + count, 0xe5, 24421da177e4SLinus Torvalds blksize - count); 24431da177e4SLinus Torvalds } 24441da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 24451da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 24461da177e4SLinus Torvalds trkid, recoffs + 1, 24478e09f215SStefan Weinhuber 1, rcmd, basedev, count); 24481da177e4SLinus Torvalds } 24491da177e4SLinus Torvalds /* Locate record for standard blocks ? */ 24501da177e4SLinus Torvalds if (private->uses_cdl && recid == 2*blk_per_trk) { 24511da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 24521da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 24531da177e4SLinus Torvalds trkid, recoffs + 1, 24541da177e4SLinus Torvalds last_rec - recid + 1, 24558e09f215SStefan Weinhuber cmd, basedev, count); 24561da177e4SLinus Torvalds } 24571da177e4SLinus Torvalds /* Read/write ccw. */ 24581da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 24591da177e4SLinus Torvalds ccw->cmd_code = rcmd; 24601da177e4SLinus Torvalds ccw->count = count; 24611da177e4SLinus Torvalds if (idal_is_needed(dst, blksize)) { 24621da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) idaws; 24631da177e4SLinus Torvalds ccw->flags = CCW_FLAG_IDA; 24641da177e4SLinus Torvalds idaws = idal_create_words(idaws, dst, blksize); 24651da177e4SLinus Torvalds } else { 24661da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) dst; 24671da177e4SLinus Torvalds ccw->flags = 0; 24681da177e4SLinus Torvalds } 24691da177e4SLinus Torvalds ccw++; 24701da177e4SLinus Torvalds dst += blksize; 24711da177e4SLinus Torvalds recid++; 24721da177e4SLinus Torvalds } 24731da177e4SLinus Torvalds } 247413de227bSHolger Smolinski if (blk_noretry_request(req) || 247513de227bSHolger Smolinski block->base->features & DASD_FEATURE_FAILFAST) 24761c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 24778e09f215SStefan Weinhuber cqr->startdev = startdev; 24788e09f215SStefan Weinhuber cqr->memdev = startdev; 24798e09f215SStefan Weinhuber cqr->block = block; 24807c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2481a4d26c6aSStefan Weinhuber cqr->lpm = startdev->path_data.ppm; 24821da177e4SLinus Torvalds cqr->retries = 256; 24831da177e4SLinus Torvalds cqr->buildclk = get_clock(); 24841da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 24851da177e4SLinus Torvalds return cqr; 24861da177e4SLinus Torvalds } 24871da177e4SLinus Torvalds 2488f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 2489f3eb5384SStefan Weinhuber struct dasd_device *startdev, 2490f3eb5384SStefan Weinhuber struct dasd_block *block, 2491f3eb5384SStefan Weinhuber struct request *req, 2492f3eb5384SStefan Weinhuber sector_t first_rec, 2493f3eb5384SStefan Weinhuber sector_t last_rec, 2494f3eb5384SStefan Weinhuber sector_t first_trk, 2495f3eb5384SStefan Weinhuber sector_t last_trk, 2496f3eb5384SStefan Weinhuber unsigned int first_offs, 2497f3eb5384SStefan Weinhuber unsigned int last_offs, 2498f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 2499f3eb5384SStefan Weinhuber unsigned int blksize) 2500f3eb5384SStefan Weinhuber { 2501f3eb5384SStefan Weinhuber unsigned long *idaws; 2502f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 2503f3eb5384SStefan Weinhuber struct ccw1 *ccw; 2504f3eb5384SStefan Weinhuber struct req_iterator iter; 2505f3eb5384SStefan Weinhuber struct bio_vec *bv; 2506f3eb5384SStefan Weinhuber char *dst, *idaw_dst; 2507f3eb5384SStefan Weinhuber unsigned int cidaw, cplength, datasize; 2508f3eb5384SStefan Weinhuber unsigned int tlf; 2509f3eb5384SStefan Weinhuber sector_t recid; 2510f3eb5384SStefan Weinhuber unsigned char cmd; 2511f3eb5384SStefan Weinhuber struct dasd_device *basedev; 2512f3eb5384SStefan Weinhuber unsigned int trkcount, count, count_to_trk_end; 2513f3eb5384SStefan Weinhuber unsigned int idaw_len, seg_len, part_len, len_to_track_end; 2514f3eb5384SStefan Weinhuber unsigned char new_track, end_idaw; 2515f3eb5384SStefan Weinhuber sector_t trkid; 2516f3eb5384SStefan Weinhuber unsigned int recoffs; 2517f3eb5384SStefan Weinhuber 2518f3eb5384SStefan Weinhuber basedev = block->base; 2519f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) 2520f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 2521f3eb5384SStefan Weinhuber else if (rq_data_dir(req) == WRITE) 2522f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 2523f3eb5384SStefan Weinhuber else 2524f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 2525f3eb5384SStefan Weinhuber 2526f3eb5384SStefan Weinhuber /* Track based I/O needs IDAWs for each page, and not just for 2527f3eb5384SStefan Weinhuber * 64 bit addresses. We need additional idals for pages 2528f3eb5384SStefan Weinhuber * that get filled from two tracks, so we use the number 2529f3eb5384SStefan Weinhuber * of records as upper limit. 2530f3eb5384SStefan Weinhuber */ 2531f3eb5384SStefan Weinhuber cidaw = last_rec - first_rec + 1; 2532f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 2533f3eb5384SStefan Weinhuber 2534f3eb5384SStefan Weinhuber /* 1x prefix + one read/write ccw per track */ 2535f3eb5384SStefan Weinhuber cplength = 1 + trkcount; 2536f3eb5384SStefan Weinhuber 2537f3eb5384SStefan Weinhuber /* on 31-bit we need space for two 32 bit addresses per page 2538f3eb5384SStefan Weinhuber * on 64-bit one 64 bit address 2539f3eb5384SStefan Weinhuber */ 2540f3eb5384SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 2541f3eb5384SStefan Weinhuber cidaw * sizeof(unsigned long long); 2542f3eb5384SStefan Weinhuber 2543f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 254468b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 254568b781feSStefan Haberland startdev); 2546f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 2547f3eb5384SStefan Weinhuber return cqr; 2548f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 2549f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 2550f3eb5384SStefan Weinhuber if (first_trk == last_trk) 2551f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 2552f3eb5384SStefan Weinhuber else 2553f3eb5384SStefan Weinhuber tlf = last_offs + 1; 2554f3eb5384SStefan Weinhuber tlf *= blksize; 2555f3eb5384SStefan Weinhuber 2556f3eb5384SStefan Weinhuber if (prefix_LRE(ccw++, cqr->data, first_trk, 2557f3eb5384SStefan Weinhuber last_trk, cmd, basedev, startdev, 2558f3eb5384SStefan Weinhuber 1 /* format */, first_offs + 1, 2559f3eb5384SStefan Weinhuber trkcount, blksize, 2560f3eb5384SStefan Weinhuber tlf) == -EAGAIN) { 2561f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 2562f3eb5384SStefan Weinhuber * Try again later. 2563f3eb5384SStefan Weinhuber */ 2564f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2565f3eb5384SStefan Weinhuber return ERR_PTR(-EAGAIN); 2566f3eb5384SStefan Weinhuber } 2567f3eb5384SStefan Weinhuber 2568f3eb5384SStefan Weinhuber /* 2569f3eb5384SStefan Weinhuber * The translation of request into ccw programs must meet the 2570f3eb5384SStefan Weinhuber * following conditions: 2571f3eb5384SStefan Weinhuber * - all idaws but the first and the last must address full pages 2572f3eb5384SStefan Weinhuber * (or 2K blocks on 31-bit) 2573f3eb5384SStefan Weinhuber * - the scope of a ccw and it's idal ends with the track boundaries 2574f3eb5384SStefan Weinhuber */ 2575f3eb5384SStefan Weinhuber idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); 2576f3eb5384SStefan Weinhuber recid = first_rec; 2577f3eb5384SStefan Weinhuber new_track = 1; 2578f3eb5384SStefan Weinhuber end_idaw = 0; 2579f3eb5384SStefan Weinhuber len_to_track_end = 0; 2580246ccea1SMartin Schwidefsky idaw_dst = NULL; 2581f3eb5384SStefan Weinhuber idaw_len = 0; 2582f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 2583f3eb5384SStefan Weinhuber dst = page_address(bv->bv_page) + bv->bv_offset; 2584f3eb5384SStefan Weinhuber seg_len = bv->bv_len; 2585f3eb5384SStefan Weinhuber while (seg_len) { 2586f3eb5384SStefan Weinhuber if (new_track) { 2587f3eb5384SStefan Weinhuber trkid = recid; 2588f3eb5384SStefan Weinhuber recoffs = sector_div(trkid, blk_per_trk); 2589f3eb5384SStefan Weinhuber count_to_trk_end = blk_per_trk - recoffs; 2590f3eb5384SStefan Weinhuber count = min((last_rec - recid + 1), 2591f3eb5384SStefan Weinhuber (sector_t)count_to_trk_end); 2592f3eb5384SStefan Weinhuber len_to_track_end = count * blksize; 2593f3eb5384SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 2594f3eb5384SStefan Weinhuber ccw->cmd_code = cmd; 2595f3eb5384SStefan Weinhuber ccw->count = len_to_track_end; 2596f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 2597f3eb5384SStefan Weinhuber ccw->flags = CCW_FLAG_IDA; 2598f3eb5384SStefan Weinhuber ccw++; 2599f3eb5384SStefan Weinhuber recid += count; 2600f3eb5384SStefan Weinhuber new_track = 0; 260152db45c3SStefan Weinhuber /* first idaw for a ccw may start anywhere */ 260252db45c3SStefan Weinhuber if (!idaw_dst) 260352db45c3SStefan Weinhuber idaw_dst = dst; 2604f3eb5384SStefan Weinhuber } 260552db45c3SStefan Weinhuber /* If we start a new idaw, we must make sure that it 260652db45c3SStefan Weinhuber * starts on an IDA_BLOCK_SIZE boundary. 2607f3eb5384SStefan Weinhuber * If we continue an idaw, we must make sure that the 2608f3eb5384SStefan Weinhuber * current segment begins where the so far accumulated 2609f3eb5384SStefan Weinhuber * idaw ends 2610f3eb5384SStefan Weinhuber */ 261152db45c3SStefan Weinhuber if (!idaw_dst) { 261252db45c3SStefan Weinhuber if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { 261352db45c3SStefan Weinhuber dasd_sfree_request(cqr, startdev); 261452db45c3SStefan Weinhuber return ERR_PTR(-ERANGE); 261552db45c3SStefan Weinhuber } else 2616f3eb5384SStefan Weinhuber idaw_dst = dst; 261752db45c3SStefan Weinhuber } 2618f3eb5384SStefan Weinhuber if ((idaw_dst + idaw_len) != dst) { 2619f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2620f3eb5384SStefan Weinhuber return ERR_PTR(-ERANGE); 2621f3eb5384SStefan Weinhuber } 2622f3eb5384SStefan Weinhuber part_len = min(seg_len, len_to_track_end); 2623f3eb5384SStefan Weinhuber seg_len -= part_len; 2624f3eb5384SStefan Weinhuber dst += part_len; 2625f3eb5384SStefan Weinhuber idaw_len += part_len; 2626f3eb5384SStefan Weinhuber len_to_track_end -= part_len; 2627f3eb5384SStefan Weinhuber /* collected memory area ends on an IDA_BLOCK border, 2628f3eb5384SStefan Weinhuber * -> create an idaw 2629f3eb5384SStefan Weinhuber * idal_create_words will handle cases where idaw_len 2630f3eb5384SStefan Weinhuber * is larger then IDA_BLOCK_SIZE 2631f3eb5384SStefan Weinhuber */ 2632f3eb5384SStefan Weinhuber if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) 2633f3eb5384SStefan Weinhuber end_idaw = 1; 2634f3eb5384SStefan Weinhuber /* We also need to end the idaw at track end */ 2635f3eb5384SStefan Weinhuber if (!len_to_track_end) { 2636f3eb5384SStefan Weinhuber new_track = 1; 2637f3eb5384SStefan Weinhuber end_idaw = 1; 2638f3eb5384SStefan Weinhuber } 2639f3eb5384SStefan Weinhuber if (end_idaw) { 2640f3eb5384SStefan Weinhuber idaws = idal_create_words(idaws, idaw_dst, 2641f3eb5384SStefan Weinhuber idaw_len); 2642246ccea1SMartin Schwidefsky idaw_dst = NULL; 2643f3eb5384SStefan Weinhuber idaw_len = 0; 2644f3eb5384SStefan Weinhuber end_idaw = 0; 2645f3eb5384SStefan Weinhuber } 2646f3eb5384SStefan Weinhuber } 2647f3eb5384SStefan Weinhuber } 2648f3eb5384SStefan Weinhuber 2649f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 2650f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 2651f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2652f3eb5384SStefan Weinhuber cqr->startdev = startdev; 2653f3eb5384SStefan Weinhuber cqr->memdev = startdev; 2654f3eb5384SStefan Weinhuber cqr->block = block; 26557c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2656a4d26c6aSStefan Weinhuber cqr->lpm = startdev->path_data.ppm; 2657f3eb5384SStefan Weinhuber cqr->retries = 256; 2658f3eb5384SStefan Weinhuber cqr->buildclk = get_clock(); 2659f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 2660f3eb5384SStefan Weinhuber return cqr; 2661f3eb5384SStefan Weinhuber } 2662f3eb5384SStefan Weinhuber 2663f3eb5384SStefan Weinhuber static int prepare_itcw(struct itcw *itcw, 2664f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 2665f3eb5384SStefan Weinhuber struct dasd_device *basedev, 2666f3eb5384SStefan Weinhuber struct dasd_device *startdev, 2667f3eb5384SStefan Weinhuber unsigned int rec_on_trk, int count, 2668f3eb5384SStefan Weinhuber unsigned int blksize, 2669f3eb5384SStefan Weinhuber unsigned int total_data_size, 2670f3eb5384SStefan Weinhuber unsigned int tlf, 2671f3eb5384SStefan Weinhuber unsigned int blk_per_trk) 2672f3eb5384SStefan Weinhuber { 2673f3eb5384SStefan Weinhuber struct PFX_eckd_data pfxdata; 2674f3eb5384SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 2675f3eb5384SStefan Weinhuber struct DE_eckd_data *dedata; 2676f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 2677f3eb5384SStefan Weinhuber struct dcw *dcw; 2678f3eb5384SStefan Weinhuber 2679f3eb5384SStefan Weinhuber u32 begcyl, endcyl; 2680f3eb5384SStefan Weinhuber u16 heads, beghead, endhead; 2681f3eb5384SStefan Weinhuber u8 pfx_cmd; 2682f3eb5384SStefan Weinhuber 2683f3eb5384SStefan Weinhuber int rc = 0; 2684f3eb5384SStefan Weinhuber int sector = 0; 2685f3eb5384SStefan Weinhuber int dn, d; 2686f3eb5384SStefan Weinhuber 2687f3eb5384SStefan Weinhuber 2688f3eb5384SStefan Weinhuber /* setup prefix data */ 2689f3eb5384SStefan Weinhuber basepriv = (struct dasd_eckd_private *) basedev->private; 2690f3eb5384SStefan Weinhuber startpriv = (struct dasd_eckd_private *) startdev->private; 2691f3eb5384SStefan Weinhuber dedata = &pfxdata.define_extent; 2692f3eb5384SStefan Weinhuber lredata = &pfxdata.locate_record; 2693f3eb5384SStefan Weinhuber 2694f3eb5384SStefan Weinhuber memset(&pfxdata, 0, sizeof(pfxdata)); 2695f3eb5384SStefan Weinhuber pfxdata.format = 1; /* PFX with LRE */ 2696f3eb5384SStefan Weinhuber pfxdata.base_address = basepriv->ned->unit_addr; 2697f3eb5384SStefan Weinhuber pfxdata.base_lss = basepriv->ned->ID; 2698f3eb5384SStefan Weinhuber pfxdata.validity.define_extent = 1; 2699f3eb5384SStefan Weinhuber 2700f3eb5384SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 2701f3eb5384SStefan Weinhuber if (startpriv->uid.type != UA_BASE_DEVICE) { 2702f3eb5384SStefan Weinhuber pfxdata.validity.verify_base = 1; 2703f3eb5384SStefan Weinhuber if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 2704f3eb5384SStefan Weinhuber pfxdata.validity.hyper_pav = 1; 2705f3eb5384SStefan Weinhuber } 2706f3eb5384SStefan Weinhuber 2707f3eb5384SStefan Weinhuber switch (cmd) { 2708f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 2709f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 2710f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 2711f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 2712f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 2713f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 2714f3eb5384SStefan Weinhuber lredata->operation.operation = 0x0C; 2715f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x01; 2716f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX_READ; 2717f3eb5384SStefan Weinhuber break; 2718f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 2719f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 2720f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 2721f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 2722f3eb5384SStefan Weinhuber rc = check_XRC_on_prefix(&pfxdata, basedev); 2723f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 2724f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 2725f3eb5384SStefan Weinhuber lredata->operation.operation = 0x3F; 2726f3eb5384SStefan Weinhuber lredata->extended_operation = 0x23; 2727f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x2; 2728f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX; 2729f3eb5384SStefan Weinhuber break; 2730f3eb5384SStefan Weinhuber default: 2731f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 2732f3eb5384SStefan Weinhuber "prepare itcw, unknown opcode 0x%x", cmd); 2733f3eb5384SStefan Weinhuber BUG(); 2734f3eb5384SStefan Weinhuber break; 2735f3eb5384SStefan Weinhuber } 2736f3eb5384SStefan Weinhuber if (rc) 2737f3eb5384SStefan Weinhuber return rc; 2738f3eb5384SStefan Weinhuber 2739f3eb5384SStefan Weinhuber dedata->attributes.mode = 0x3; /* ECKD */ 2740f3eb5384SStefan Weinhuber 2741f3eb5384SStefan Weinhuber heads = basepriv->rdc_data.trk_per_cyl; 2742f3eb5384SStefan Weinhuber begcyl = trk / heads; 2743f3eb5384SStefan Weinhuber beghead = trk % heads; 2744f3eb5384SStefan Weinhuber endcyl = totrk / heads; 2745f3eb5384SStefan Weinhuber endhead = totrk % heads; 2746f3eb5384SStefan Weinhuber 2747f3eb5384SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 2748f3eb5384SStefan Weinhuber if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 2749f3eb5384SStefan Weinhuber dedata->attributes.operation == DASD_SEQ_ACCESS) { 2750f3eb5384SStefan Weinhuber 2751f3eb5384SStefan Weinhuber if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 2752f3eb5384SStefan Weinhuber endcyl += basepriv->attrib.nr_cyl; 2753f3eb5384SStefan Weinhuber else 2754f3eb5384SStefan Weinhuber endcyl = (basepriv->real_cyl - 1); 2755f3eb5384SStefan Weinhuber } 2756f3eb5384SStefan Weinhuber 2757f3eb5384SStefan Weinhuber set_ch_t(&dedata->beg_ext, begcyl, beghead); 2758f3eb5384SStefan Weinhuber set_ch_t(&dedata->end_ext, endcyl, endhead); 2759f3eb5384SStefan Weinhuber 2760f3eb5384SStefan Weinhuber dedata->ep_format = 0x20; /* records per track is valid */ 2761f3eb5384SStefan Weinhuber dedata->ep_rec_per_track = blk_per_trk; 2762f3eb5384SStefan Weinhuber 2763f3eb5384SStefan Weinhuber if (rec_on_trk) { 2764f3eb5384SStefan Weinhuber switch (basepriv->rdc_data.dev_type) { 2765f3eb5384SStefan Weinhuber case 0x3390: 2766f3eb5384SStefan Weinhuber dn = ceil_quot(blksize + 6, 232); 2767f3eb5384SStefan Weinhuber d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); 2768f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 2769f3eb5384SStefan Weinhuber break; 2770f3eb5384SStefan Weinhuber case 0x3380: 2771f3eb5384SStefan Weinhuber d = 7 + ceil_quot(blksize + 12, 32); 2772f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 2773f3eb5384SStefan Weinhuber break; 2774f3eb5384SStefan Weinhuber } 2775f3eb5384SStefan Weinhuber } 2776f3eb5384SStefan Weinhuber 2777f3eb5384SStefan Weinhuber lredata->auxiliary.length_valid = 1; 2778f3eb5384SStefan Weinhuber lredata->auxiliary.length_scope = 1; 2779f3eb5384SStefan Weinhuber lredata->auxiliary.imbedded_ccw_valid = 1; 2780f3eb5384SStefan Weinhuber lredata->length = tlf; 2781f3eb5384SStefan Weinhuber lredata->imbedded_ccw = cmd; 2782f3eb5384SStefan Weinhuber lredata->count = count; 2783f3eb5384SStefan Weinhuber lredata->sector = sector; 2784f3eb5384SStefan Weinhuber set_ch_t(&lredata->seek_addr, begcyl, beghead); 2785f3eb5384SStefan Weinhuber lredata->search_arg.cyl = lredata->seek_addr.cyl; 2786f3eb5384SStefan Weinhuber lredata->search_arg.head = lredata->seek_addr.head; 2787f3eb5384SStefan Weinhuber lredata->search_arg.record = rec_on_trk; 2788f3eb5384SStefan Weinhuber 2789f3eb5384SStefan Weinhuber dcw = itcw_add_dcw(itcw, pfx_cmd, 0, 2790f3eb5384SStefan Weinhuber &pfxdata, sizeof(pfxdata), total_data_size); 2791364c18d8SHeiko Carstens return IS_ERR(dcw) ? PTR_ERR(dcw) : 0; 2792f3eb5384SStefan Weinhuber } 2793f3eb5384SStefan Weinhuber 2794f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 2795f3eb5384SStefan Weinhuber struct dasd_device *startdev, 2796f3eb5384SStefan Weinhuber struct dasd_block *block, 2797f3eb5384SStefan Weinhuber struct request *req, 2798f3eb5384SStefan Weinhuber sector_t first_rec, 2799f3eb5384SStefan Weinhuber sector_t last_rec, 2800f3eb5384SStefan Weinhuber sector_t first_trk, 2801f3eb5384SStefan Weinhuber sector_t last_trk, 2802f3eb5384SStefan Weinhuber unsigned int first_offs, 2803f3eb5384SStefan Weinhuber unsigned int last_offs, 2804f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 2805f3eb5384SStefan Weinhuber unsigned int blksize) 2806f3eb5384SStefan Weinhuber { 2807f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 2808f3eb5384SStefan Weinhuber struct req_iterator iter; 2809f3eb5384SStefan Weinhuber struct bio_vec *bv; 2810f3eb5384SStefan Weinhuber char *dst; 2811f3eb5384SStefan Weinhuber unsigned int trkcount, ctidaw; 2812f3eb5384SStefan Weinhuber unsigned char cmd; 2813f3eb5384SStefan Weinhuber struct dasd_device *basedev; 2814f3eb5384SStefan Weinhuber unsigned int tlf; 2815f3eb5384SStefan Weinhuber struct itcw *itcw; 2816f3eb5384SStefan Weinhuber struct tidaw *last_tidaw = NULL; 2817f3eb5384SStefan Weinhuber int itcw_op; 2818f3eb5384SStefan Weinhuber size_t itcw_size; 2819ef19298bSStefan Weinhuber u8 tidaw_flags; 2820ef19298bSStefan Weinhuber unsigned int seg_len, part_len, len_to_track_end; 2821ef19298bSStefan Weinhuber unsigned char new_track; 2822ef19298bSStefan Weinhuber sector_t recid, trkid; 2823ef19298bSStefan Weinhuber unsigned int offs; 2824ef19298bSStefan Weinhuber unsigned int count, count_to_trk_end; 2825f3eb5384SStefan Weinhuber 2826f3eb5384SStefan Weinhuber basedev = block->base; 2827f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) { 2828f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 2829f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_READ; 2830f3eb5384SStefan Weinhuber } else if (rq_data_dir(req) == WRITE) { 2831f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 2832f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_WRITE; 2833f3eb5384SStefan Weinhuber } else 2834f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 2835f3eb5384SStefan Weinhuber 2836f3eb5384SStefan Weinhuber /* trackbased I/O needs address all memory via TIDAWs, 2837f3eb5384SStefan Weinhuber * not just for 64 bit addresses. This allows us to map 2838f3eb5384SStefan Weinhuber * each segment directly to one tidaw. 2839ef19298bSStefan Weinhuber * In the case of write requests, additional tidaws may 2840ef19298bSStefan Weinhuber * be needed when a segment crosses a track boundary. 2841f3eb5384SStefan Weinhuber */ 2842f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 2843f3eb5384SStefan Weinhuber ctidaw = 0; 2844f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 2845f3eb5384SStefan Weinhuber ++ctidaw; 2846f3eb5384SStefan Weinhuber } 2847ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 2848ef19298bSStefan Weinhuber ctidaw += (last_trk - first_trk); 2849f3eb5384SStefan Weinhuber 2850f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 2851f3eb5384SStefan Weinhuber itcw_size = itcw_calc_size(0, ctidaw, 0); 285268b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 2853f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 2854f3eb5384SStefan Weinhuber return cqr; 2855f3eb5384SStefan Weinhuber 2856f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 2857f3eb5384SStefan Weinhuber if (first_trk == last_trk) 2858f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 2859f3eb5384SStefan Weinhuber else 2860f3eb5384SStefan Weinhuber tlf = last_offs + 1; 2861f3eb5384SStefan Weinhuber tlf *= blksize; 2862f3eb5384SStefan Weinhuber 2863f3eb5384SStefan Weinhuber itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); 2864ef19298bSStefan Weinhuber if (IS_ERR(itcw)) { 2865ef19298bSStefan Weinhuber dasd_sfree_request(cqr, startdev); 2866ef19298bSStefan Weinhuber return ERR_PTR(-EINVAL); 2867ef19298bSStefan Weinhuber } 2868f3eb5384SStefan Weinhuber cqr->cpaddr = itcw_get_tcw(itcw); 2869f3eb5384SStefan Weinhuber if (prepare_itcw(itcw, first_trk, last_trk, 2870f3eb5384SStefan Weinhuber cmd, basedev, startdev, 2871f3eb5384SStefan Weinhuber first_offs + 1, 2872f3eb5384SStefan Weinhuber trkcount, blksize, 2873f3eb5384SStefan Weinhuber (last_rec - first_rec + 1) * blksize, 2874f3eb5384SStefan Weinhuber tlf, blk_per_trk) == -EAGAIN) { 2875f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 2876f3eb5384SStefan Weinhuber * Try again later. 2877f3eb5384SStefan Weinhuber */ 2878f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2879f3eb5384SStefan Weinhuber return ERR_PTR(-EAGAIN); 2880f3eb5384SStefan Weinhuber } 2881d54cddb6SHeiko Carstens len_to_track_end = 0; 2882f3eb5384SStefan Weinhuber /* 2883f3eb5384SStefan Weinhuber * A tidaw can address 4k of memory, but must not cross page boundaries 2884f3eb5384SStefan Weinhuber * We can let the block layer handle this by setting 2885f3eb5384SStefan Weinhuber * blk_queue_segment_boundary to page boundaries and 2886f3eb5384SStefan Weinhuber * blk_max_segment_size to page size when setting up the request queue. 2887ef19298bSStefan Weinhuber * For write requests, a TIDAW must not cross track boundaries, because 2888ef19298bSStefan Weinhuber * we have to set the CBC flag on the last tidaw for each track. 2889f3eb5384SStefan Weinhuber */ 2890ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) { 2891ef19298bSStefan Weinhuber new_track = 1; 2892ef19298bSStefan Weinhuber recid = first_rec; 2893f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 2894f3eb5384SStefan Weinhuber dst = page_address(bv->bv_page) + bv->bv_offset; 2895ef19298bSStefan Weinhuber seg_len = bv->bv_len; 2896ef19298bSStefan Weinhuber while (seg_len) { 2897ef19298bSStefan Weinhuber if (new_track) { 2898ef19298bSStefan Weinhuber trkid = recid; 2899ef19298bSStefan Weinhuber offs = sector_div(trkid, blk_per_trk); 2900ef19298bSStefan Weinhuber count_to_trk_end = blk_per_trk - offs; 2901ef19298bSStefan Weinhuber count = min((last_rec - recid + 1), 2902ef19298bSStefan Weinhuber (sector_t)count_to_trk_end); 2903ef19298bSStefan Weinhuber len_to_track_end = count * blksize; 2904ef19298bSStefan Weinhuber recid += count; 2905ef19298bSStefan Weinhuber new_track = 0; 2906f3eb5384SStefan Weinhuber } 2907ef19298bSStefan Weinhuber part_len = min(seg_len, len_to_track_end); 2908ef19298bSStefan Weinhuber seg_len -= part_len; 2909ef19298bSStefan Weinhuber len_to_track_end -= part_len; 2910ef19298bSStefan Weinhuber /* We need to end the tidaw at track end */ 2911ef19298bSStefan Weinhuber if (!len_to_track_end) { 2912ef19298bSStefan Weinhuber new_track = 1; 2913ef19298bSStefan Weinhuber tidaw_flags = TIDAW_FLAGS_INSERT_CBC; 2914ef19298bSStefan Weinhuber } else 2915ef19298bSStefan Weinhuber tidaw_flags = 0; 2916ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, 2917ef19298bSStefan Weinhuber dst, part_len); 2918ef19298bSStefan Weinhuber if (IS_ERR(last_tidaw)) 2919ef19298bSStefan Weinhuber return ERR_PTR(-EINVAL); 2920ef19298bSStefan Weinhuber dst += part_len; 2921ef19298bSStefan Weinhuber } 2922ef19298bSStefan Weinhuber } 2923ef19298bSStefan Weinhuber } else { 2924ef19298bSStefan Weinhuber rq_for_each_segment(bv, req, iter) { 2925ef19298bSStefan Weinhuber dst = page_address(bv->bv_page) + bv->bv_offset; 2926ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, 0x00, 2927ef19298bSStefan Weinhuber dst, bv->bv_len); 2928ef19298bSStefan Weinhuber if (IS_ERR(last_tidaw)) 2929ef19298bSStefan Weinhuber return ERR_PTR(-EINVAL); 2930ef19298bSStefan Weinhuber } 2931ef19298bSStefan Weinhuber } 2932ef19298bSStefan Weinhuber last_tidaw->flags |= TIDAW_FLAGS_LAST; 2933ef19298bSStefan Weinhuber last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; 2934f3eb5384SStefan Weinhuber itcw_finalize(itcw); 2935f3eb5384SStefan Weinhuber 2936f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 2937f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 2938f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2939ef19298bSStefan Weinhuber cqr->cpmode = 1; 2940f3eb5384SStefan Weinhuber cqr->startdev = startdev; 2941f3eb5384SStefan Weinhuber cqr->memdev = startdev; 2942f3eb5384SStefan Weinhuber cqr->block = block; 29437c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2944a4d26c6aSStefan Weinhuber cqr->lpm = startdev->path_data.ppm; 2945f3eb5384SStefan Weinhuber cqr->retries = 256; 2946f3eb5384SStefan Weinhuber cqr->buildclk = get_clock(); 2947f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 2948f3eb5384SStefan Weinhuber return cqr; 2949f3eb5384SStefan Weinhuber } 2950f3eb5384SStefan Weinhuber 2951f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 2952f3eb5384SStefan Weinhuber struct dasd_block *block, 2953f3eb5384SStefan Weinhuber struct request *req) 2954f3eb5384SStefan Weinhuber { 2955ef19298bSStefan Weinhuber int cmdrtd, cmdwtd; 2956f3eb5384SStefan Weinhuber int use_prefix; 2957ef19298bSStefan Weinhuber int fcx_multitrack; 295845b44d76SStefan Weinhuber struct dasd_eckd_private *private; 2959f3eb5384SStefan Weinhuber struct dasd_device *basedev; 2960f3eb5384SStefan Weinhuber sector_t first_rec, last_rec; 2961f3eb5384SStefan Weinhuber sector_t first_trk, last_trk; 2962f3eb5384SStefan Weinhuber unsigned int first_offs, last_offs; 2963f3eb5384SStefan Weinhuber unsigned int blk_per_trk, blksize; 2964f3eb5384SStefan Weinhuber int cdlspecial; 2965ef19298bSStefan Weinhuber unsigned int data_size; 2966f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 2967f3eb5384SStefan Weinhuber 2968f3eb5384SStefan Weinhuber basedev = block->base; 2969f3eb5384SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 2970f3eb5384SStefan Weinhuber 2971f3eb5384SStefan Weinhuber /* Calculate number of blocks/records per track. */ 2972f3eb5384SStefan Weinhuber blksize = block->bp_block; 2973f3eb5384SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 29746fca97a9SStefan Haberland if (blk_per_trk == 0) 29756fca97a9SStefan Haberland return ERR_PTR(-EINVAL); 2976f3eb5384SStefan Weinhuber /* Calculate record id of first and last block. */ 297783096ebfSTejun Heo first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; 2978f3eb5384SStefan Weinhuber first_offs = sector_div(first_trk, blk_per_trk); 2979f3eb5384SStefan Weinhuber last_rec = last_trk = 298083096ebfSTejun Heo (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 2981f3eb5384SStefan Weinhuber last_offs = sector_div(last_trk, blk_per_trk); 2982f3eb5384SStefan Weinhuber cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); 2983f3eb5384SStefan Weinhuber 2984ef19298bSStefan Weinhuber fcx_multitrack = private->features.feature[40] & 0x20; 2985ef19298bSStefan Weinhuber data_size = blk_rq_bytes(req); 2986ef19298bSStefan Weinhuber /* tpm write request add CBC data on each track boundary */ 2987ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 2988ef19298bSStefan Weinhuber data_size += (last_trk - first_trk) * 4; 2989f3eb5384SStefan Weinhuber 2990f3eb5384SStefan Weinhuber /* is read track data and write track data in command mode supported? */ 2991f3eb5384SStefan Weinhuber cmdrtd = private->features.feature[9] & 0x20; 2992f3eb5384SStefan Weinhuber cmdwtd = private->features.feature[12] & 0x40; 2993f3eb5384SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 2994f3eb5384SStefan Weinhuber 2995f3eb5384SStefan Weinhuber cqr = NULL; 2996f3eb5384SStefan Weinhuber if (cdlspecial || dasd_page_cache) { 2997f3eb5384SStefan Weinhuber /* do nothing, just fall through to the cmd mode single case */ 2998ef19298bSStefan Weinhuber } else if ((data_size <= private->fcx_max_data) 2999ef19298bSStefan Weinhuber && (fcx_multitrack || (first_trk == last_trk))) { 3000f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, 3001f3eb5384SStefan Weinhuber first_rec, last_rec, 3002f3eb5384SStefan Weinhuber first_trk, last_trk, 3003f3eb5384SStefan Weinhuber first_offs, last_offs, 3004f3eb5384SStefan Weinhuber blk_per_trk, blksize); 3005ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3006ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 3007f3eb5384SStefan Weinhuber cqr = NULL; 3008f3eb5384SStefan Weinhuber } else if (use_prefix && 3009f3eb5384SStefan Weinhuber (((rq_data_dir(req) == READ) && cmdrtd) || 3010f3eb5384SStefan Weinhuber ((rq_data_dir(req) == WRITE) && cmdwtd))) { 3011f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, 3012f3eb5384SStefan Weinhuber first_rec, last_rec, 3013f3eb5384SStefan Weinhuber first_trk, last_trk, 3014f3eb5384SStefan Weinhuber first_offs, last_offs, 3015f3eb5384SStefan Weinhuber blk_per_trk, blksize); 3016ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3017ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 3018f3eb5384SStefan Weinhuber cqr = NULL; 3019f3eb5384SStefan Weinhuber } 3020f3eb5384SStefan Weinhuber if (!cqr) 3021f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, 3022f3eb5384SStefan Weinhuber first_rec, last_rec, 3023f3eb5384SStefan Weinhuber first_trk, last_trk, 3024f3eb5384SStefan Weinhuber first_offs, last_offs, 3025f3eb5384SStefan Weinhuber blk_per_trk, blksize); 3026f3eb5384SStefan Weinhuber return cqr; 3027f3eb5384SStefan Weinhuber } 3028f3eb5384SStefan Weinhuber 3029e4dbb0f2SStefan Haberland static struct dasd_ccw_req *dasd_raw_build_cp(struct dasd_device *startdev, 3030e4dbb0f2SStefan Haberland struct dasd_block *block, 3031e4dbb0f2SStefan Haberland struct request *req) 3032e4dbb0f2SStefan Haberland { 3033e4dbb0f2SStefan Haberland unsigned long *idaws; 3034e4dbb0f2SStefan Haberland struct dasd_device *basedev; 3035e4dbb0f2SStefan Haberland struct dasd_ccw_req *cqr; 3036e4dbb0f2SStefan Haberland struct ccw1 *ccw; 3037e4dbb0f2SStefan Haberland struct req_iterator iter; 3038e4dbb0f2SStefan Haberland struct bio_vec *bv; 3039e4dbb0f2SStefan Haberland char *dst; 3040e4dbb0f2SStefan Haberland unsigned char cmd; 3041e4dbb0f2SStefan Haberland unsigned int trkcount; 3042e4dbb0f2SStefan Haberland unsigned int seg_len, len_to_track_end; 3043e4dbb0f2SStefan Haberland unsigned int first_offs; 3044e4dbb0f2SStefan Haberland unsigned int cidaw, cplength, datasize; 3045e4dbb0f2SStefan Haberland sector_t first_trk, last_trk; 3046e4dbb0f2SStefan Haberland unsigned int pfx_datasize; 3047e4dbb0f2SStefan Haberland 3048e4dbb0f2SStefan Haberland /* 3049e4dbb0f2SStefan Haberland * raw track access needs to be mutiple of 64k and on 64k boundary 3050e4dbb0f2SStefan Haberland */ 3051e4dbb0f2SStefan Haberland if ((blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK) != 0) { 3052e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EINVAL); 3053e4dbb0f2SStefan Haberland goto out; 3054e4dbb0f2SStefan Haberland } 3055e4dbb0f2SStefan Haberland if (((blk_rq_pos(req) + blk_rq_sectors(req)) % 3056e4dbb0f2SStefan Haberland DASD_RAW_SECTORS_PER_TRACK) != 0) { 3057e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EINVAL); 3058e4dbb0f2SStefan Haberland goto out; 3059e4dbb0f2SStefan Haberland } 3060e4dbb0f2SStefan Haberland 3061e4dbb0f2SStefan Haberland first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; 3062e4dbb0f2SStefan Haberland last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / 3063e4dbb0f2SStefan Haberland DASD_RAW_SECTORS_PER_TRACK; 3064e4dbb0f2SStefan Haberland trkcount = last_trk - first_trk + 1; 3065e4dbb0f2SStefan Haberland first_offs = 0; 3066e4dbb0f2SStefan Haberland basedev = block->base; 3067e4dbb0f2SStefan Haberland 3068e4dbb0f2SStefan Haberland if (rq_data_dir(req) == READ) 3069e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_READ_TRACK; 3070e4dbb0f2SStefan Haberland else if (rq_data_dir(req) == WRITE) 3071e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; 3072e4dbb0f2SStefan Haberland else { 3073e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EINVAL); 3074e4dbb0f2SStefan Haberland goto out; 3075e4dbb0f2SStefan Haberland } 3076e4dbb0f2SStefan Haberland 3077e4dbb0f2SStefan Haberland /* 3078e4dbb0f2SStefan Haberland * Raw track based I/O needs IDAWs for each page, 3079e4dbb0f2SStefan Haberland * and not just for 64 bit addresses. 3080e4dbb0f2SStefan Haberland */ 3081e4dbb0f2SStefan Haberland cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; 3082e4dbb0f2SStefan Haberland 3083e4dbb0f2SStefan Haberland /* 1x prefix + one read/write ccw per track */ 3084e4dbb0f2SStefan Haberland cplength = 1 + trkcount; 3085e4dbb0f2SStefan Haberland 3086e4dbb0f2SStefan Haberland /* 3087e4dbb0f2SStefan Haberland * struct PFX_eckd_data has up to 2 byte as extended parameter 3088e4dbb0f2SStefan Haberland * this is needed for write full track and has to be mentioned 308925985edcSLucas De Marchi * separately 3090e4dbb0f2SStefan Haberland * add 8 instead of 2 to keep 8 byte boundary 3091e4dbb0f2SStefan Haberland */ 3092e4dbb0f2SStefan Haberland pfx_datasize = sizeof(struct PFX_eckd_data) + 8; 3093e4dbb0f2SStefan Haberland 3094e4dbb0f2SStefan Haberland datasize = pfx_datasize + cidaw * sizeof(unsigned long long); 3095e4dbb0f2SStefan Haberland 3096e4dbb0f2SStefan Haberland /* Allocate the ccw request. */ 3097e4dbb0f2SStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 3098e4dbb0f2SStefan Haberland datasize, startdev); 3099e4dbb0f2SStefan Haberland if (IS_ERR(cqr)) 3100e4dbb0f2SStefan Haberland goto out; 3101e4dbb0f2SStefan Haberland ccw = cqr->cpaddr; 3102e4dbb0f2SStefan Haberland 3103e4dbb0f2SStefan Haberland if (prefix_LRE(ccw++, cqr->data, first_trk, last_trk, cmd, 3104e4dbb0f2SStefan Haberland basedev, startdev, 1 /* format */, first_offs + 1, 3105e4dbb0f2SStefan Haberland trkcount, 0, 0) == -EAGAIN) { 3106e4dbb0f2SStefan Haberland /* Clock not in sync and XRC is enabled. 3107e4dbb0f2SStefan Haberland * Try again later. 3108e4dbb0f2SStefan Haberland */ 3109e4dbb0f2SStefan Haberland dasd_sfree_request(cqr, startdev); 3110e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EAGAIN); 3111e4dbb0f2SStefan Haberland goto out; 3112e4dbb0f2SStefan Haberland } 3113e4dbb0f2SStefan Haberland 3114e4dbb0f2SStefan Haberland idaws = (unsigned long *)(cqr->data + pfx_datasize); 3115e4dbb0f2SStefan Haberland 3116e4dbb0f2SStefan Haberland len_to_track_end = 0; 3117e4dbb0f2SStefan Haberland 3118e4dbb0f2SStefan Haberland rq_for_each_segment(bv, req, iter) { 3119e4dbb0f2SStefan Haberland dst = page_address(bv->bv_page) + bv->bv_offset; 3120e4dbb0f2SStefan Haberland seg_len = bv->bv_len; 3121e4dbb0f2SStefan Haberland if (!len_to_track_end) { 3122e4dbb0f2SStefan Haberland ccw[-1].flags |= CCW_FLAG_CC; 3123e4dbb0f2SStefan Haberland ccw->cmd_code = cmd; 3124e4dbb0f2SStefan Haberland /* maximum 3390 track size */ 3125e4dbb0f2SStefan Haberland ccw->count = 57326; 3126e4dbb0f2SStefan Haberland /* 64k map to one track */ 3127e4dbb0f2SStefan Haberland len_to_track_end = 65536; 3128e4dbb0f2SStefan Haberland ccw->cda = (__u32)(addr_t)idaws; 3129e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_IDA; 3130e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 3131e4dbb0f2SStefan Haberland ccw++; 3132e4dbb0f2SStefan Haberland } 3133e4dbb0f2SStefan Haberland len_to_track_end -= seg_len; 3134e4dbb0f2SStefan Haberland idaws = idal_create_words(idaws, dst, seg_len); 3135e4dbb0f2SStefan Haberland } 3136e4dbb0f2SStefan Haberland 3137e4dbb0f2SStefan Haberland if (blk_noretry_request(req) || 3138e4dbb0f2SStefan Haberland block->base->features & DASD_FEATURE_FAILFAST) 3139e4dbb0f2SStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3140e4dbb0f2SStefan Haberland cqr->startdev = startdev; 3141e4dbb0f2SStefan Haberland cqr->memdev = startdev; 3142e4dbb0f2SStefan Haberland cqr->block = block; 3143e4dbb0f2SStefan Haberland cqr->expires = startdev->default_expires * HZ; 3144e4dbb0f2SStefan Haberland cqr->lpm = startdev->path_data.ppm; 3145e4dbb0f2SStefan Haberland cqr->retries = 256; 3146e4dbb0f2SStefan Haberland cqr->buildclk = get_clock(); 3147e4dbb0f2SStefan Haberland cqr->status = DASD_CQR_FILLED; 3148e4dbb0f2SStefan Haberland 3149e4dbb0f2SStefan Haberland if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN) 3150e4dbb0f2SStefan Haberland cqr = NULL; 3151e4dbb0f2SStefan Haberland out: 3152e4dbb0f2SStefan Haberland return cqr; 3153e4dbb0f2SStefan Haberland } 3154e4dbb0f2SStefan Haberland 3155e4dbb0f2SStefan Haberland 31561da177e4SLinus Torvalds static int 31571da177e4SLinus Torvalds dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 31581da177e4SLinus Torvalds { 31591da177e4SLinus Torvalds struct dasd_eckd_private *private; 31601da177e4SLinus Torvalds struct ccw1 *ccw; 31615705f702SNeilBrown struct req_iterator iter; 31621da177e4SLinus Torvalds struct bio_vec *bv; 31631da177e4SLinus Torvalds char *dst, *cda; 31641da177e4SLinus Torvalds unsigned int blksize, blk_per_trk, off; 31651da177e4SLinus Torvalds sector_t recid; 31665705f702SNeilBrown int status; 31671da177e4SLinus Torvalds 31681da177e4SLinus Torvalds if (!dasd_page_cache) 31691da177e4SLinus Torvalds goto out; 31708e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) cqr->block->base->private; 31718e09f215SStefan Weinhuber blksize = cqr->block->bp_block; 31721da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 317383096ebfSTejun Heo recid = blk_rq_pos(req) >> cqr->block->s2b_shift; 31741da177e4SLinus Torvalds ccw = cqr->cpaddr; 31751da177e4SLinus Torvalds /* Skip over define extent & locate record. */ 31761da177e4SLinus Torvalds ccw++; 31771da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 31781da177e4SLinus Torvalds ccw++; 31795705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 31801da177e4SLinus Torvalds dst = page_address(bv->bv_page) + bv->bv_offset; 31811da177e4SLinus Torvalds for (off = 0; off < bv->bv_len; off += blksize) { 31821da177e4SLinus Torvalds /* Skip locate record. */ 31831da177e4SLinus Torvalds if (private->uses_cdl && recid <= 2*blk_per_trk) 31841da177e4SLinus Torvalds ccw++; 31851da177e4SLinus Torvalds if (dst) { 31861da177e4SLinus Torvalds if (ccw->flags & CCW_FLAG_IDA) 31871da177e4SLinus Torvalds cda = *((char **)((addr_t) ccw->cda)); 31881da177e4SLinus Torvalds else 31891da177e4SLinus Torvalds cda = (char *)((addr_t) ccw->cda); 31901da177e4SLinus Torvalds if (dst != cda) { 31911da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 31921da177e4SLinus Torvalds memcpy(dst, cda, bv->bv_len); 31931da177e4SLinus Torvalds kmem_cache_free(dasd_page_cache, 31941da177e4SLinus Torvalds (void *)((addr_t)cda & PAGE_MASK)); 31951da177e4SLinus Torvalds } 31961da177e4SLinus Torvalds dst = NULL; 31971da177e4SLinus Torvalds } 31981da177e4SLinus Torvalds ccw++; 31991da177e4SLinus Torvalds recid++; 32001da177e4SLinus Torvalds } 32011da177e4SLinus Torvalds } 32021da177e4SLinus Torvalds out: 32031da177e4SLinus Torvalds status = cqr->status == DASD_CQR_DONE; 32048e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 32051da177e4SLinus Torvalds return status; 32061da177e4SLinus Torvalds } 32071da177e4SLinus Torvalds 32088e09f215SStefan Weinhuber /* 3209f3eb5384SStefan Weinhuber * Modify ccw/tcw in cqr so it can be started on a base device. 32108e09f215SStefan Weinhuber * 32118e09f215SStefan Weinhuber * Note that this is not enough to restart the cqr! 32128e09f215SStefan Weinhuber * Either reset cqr->startdev as well (summary unit check handling) 32138e09f215SStefan Weinhuber * or restart via separate cqr (as in ERP handling). 32148e09f215SStefan Weinhuber */ 32158e09f215SStefan Weinhuber void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 32168e09f215SStefan Weinhuber { 32178e09f215SStefan Weinhuber struct ccw1 *ccw; 32188e09f215SStefan Weinhuber struct PFX_eckd_data *pfxdata; 3219f3eb5384SStefan Weinhuber struct tcw *tcw; 3220f3eb5384SStefan Weinhuber struct tccb *tccb; 3221f3eb5384SStefan Weinhuber struct dcw *dcw; 32228e09f215SStefan Weinhuber 3223f3eb5384SStefan Weinhuber if (cqr->cpmode == 1) { 3224f3eb5384SStefan Weinhuber tcw = cqr->cpaddr; 3225f3eb5384SStefan Weinhuber tccb = tcw_get_tccb(tcw); 3226f3eb5384SStefan Weinhuber dcw = (struct dcw *)&tccb->tca[0]; 3227f3eb5384SStefan Weinhuber pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; 3228f3eb5384SStefan Weinhuber pfxdata->validity.verify_base = 0; 3229f3eb5384SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 3230f3eb5384SStefan Weinhuber } else { 32318e09f215SStefan Weinhuber ccw = cqr->cpaddr; 32328e09f215SStefan Weinhuber pfxdata = cqr->data; 32338e09f215SStefan Weinhuber if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 32348e09f215SStefan Weinhuber pfxdata->validity.verify_base = 0; 32358e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 32368e09f215SStefan Weinhuber } 32378e09f215SStefan Weinhuber } 3238f3eb5384SStefan Weinhuber } 32398e09f215SStefan Weinhuber 32408e09f215SStefan Weinhuber #define DASD_ECKD_CHANQ_MAX_SIZE 4 32418e09f215SStefan Weinhuber 32428e09f215SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 32438e09f215SStefan Weinhuber struct dasd_block *block, 32448e09f215SStefan Weinhuber struct request *req) 32458e09f215SStefan Weinhuber { 32468e09f215SStefan Weinhuber struct dasd_eckd_private *private; 32478e09f215SStefan Weinhuber struct dasd_device *startdev; 32488e09f215SStefan Weinhuber unsigned long flags; 32498e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 32508e09f215SStefan Weinhuber 32518e09f215SStefan Weinhuber startdev = dasd_alias_get_start_dev(base); 32528e09f215SStefan Weinhuber if (!startdev) 32538e09f215SStefan Weinhuber startdev = base; 32548e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) startdev->private; 32558e09f215SStefan Weinhuber if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 32568e09f215SStefan Weinhuber return ERR_PTR(-EBUSY); 32578e09f215SStefan Weinhuber 32588e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 32598e09f215SStefan Weinhuber private->count++; 3260e4dbb0f2SStefan Haberland if ((base->features & DASD_FEATURE_USERAW)) 3261e4dbb0f2SStefan Haberland cqr = dasd_raw_build_cp(startdev, block, req); 3262e4dbb0f2SStefan Haberland else 32638e09f215SStefan Weinhuber cqr = dasd_eckd_build_cp(startdev, block, req); 32648e09f215SStefan Weinhuber if (IS_ERR(cqr)) 32658e09f215SStefan Weinhuber private->count--; 32668e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 32678e09f215SStefan Weinhuber return cqr; 32688e09f215SStefan Weinhuber } 32698e09f215SStefan Weinhuber 32708e09f215SStefan Weinhuber static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 32718e09f215SStefan Weinhuber struct request *req) 32728e09f215SStefan Weinhuber { 32738e09f215SStefan Weinhuber struct dasd_eckd_private *private; 32748e09f215SStefan Weinhuber unsigned long flags; 32758e09f215SStefan Weinhuber 32768e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 32778e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) cqr->memdev->private; 32788e09f215SStefan Weinhuber private->count--; 32798e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 32808e09f215SStefan Weinhuber return dasd_eckd_free_cp(cqr, req); 32818e09f215SStefan Weinhuber } 32828e09f215SStefan Weinhuber 32831da177e4SLinus Torvalds static int 32841da177e4SLinus Torvalds dasd_eckd_fill_info(struct dasd_device * device, 32851da177e4SLinus Torvalds struct dasd_information2_t * info) 32861da177e4SLinus Torvalds { 32871da177e4SLinus Torvalds struct dasd_eckd_private *private; 32881da177e4SLinus Torvalds 32891da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 32901da177e4SLinus Torvalds info->label_block = 2; 32911da177e4SLinus Torvalds info->FBA_layout = private->uses_cdl ? 0 : 1; 32921da177e4SLinus Torvalds info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 32931da177e4SLinus Torvalds info->characteristics_size = sizeof(struct dasd_eckd_characteristics); 32941da177e4SLinus Torvalds memcpy(info->characteristics, &private->rdc_data, 32951da177e4SLinus Torvalds sizeof(struct dasd_eckd_characteristics)); 32964abb08c2SStefan Weinhuber info->confdata_size = min((unsigned long)private->conf_len, 32974abb08c2SStefan Weinhuber sizeof(info->configuration_data)); 32984abb08c2SStefan Weinhuber memcpy(info->configuration_data, private->conf_data, 32994abb08c2SStefan Weinhuber info->confdata_size); 33001da177e4SLinus Torvalds return 0; 33011da177e4SLinus Torvalds } 33021da177e4SLinus Torvalds 33031da177e4SLinus Torvalds /* 33041da177e4SLinus Torvalds * SECTION: ioctl functions for eckd devices. 33051da177e4SLinus Torvalds */ 33061da177e4SLinus Torvalds 33071da177e4SLinus Torvalds /* 33081da177e4SLinus Torvalds * Release device ioctl. 33091da177e4SLinus Torvalds * Buils a channel programm to releases a prior reserved 33101da177e4SLinus Torvalds * (see dasd_eckd_reserve) device. 33111da177e4SLinus Torvalds */ 33121da177e4SLinus Torvalds static int 33131107ccfbSChristoph Hellwig dasd_eckd_release(struct dasd_device *device) 33141da177e4SLinus Torvalds { 33151da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 33161da177e4SLinus Torvalds int rc; 3317f3eb5384SStefan Weinhuber struct ccw1 *ccw; 3318f932bceaSStefan Weinhuber int useglobal; 33191da177e4SLinus Torvalds 33201da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 33211da177e4SLinus Torvalds return -EACCES; 33221da177e4SLinus Torvalds 3323f932bceaSStefan Weinhuber useglobal = 0; 332468b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 33251da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3326f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3327f932bceaSStefan Weinhuber useglobal = 1; 3328f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3329f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3330f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3331f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3332f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3333f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3334f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 33351da177e4SLinus Torvalds } 3336f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 3337f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RELEASE; 3338f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3339f3eb5384SStefan Weinhuber ccw->count = 32; 3340f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 33418e09f215SStefan Weinhuber cqr->startdev = device; 33428e09f215SStefan Weinhuber cqr->memdev = device; 33431da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 33441c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3345336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 33461da177e4SLinus Torvalds cqr->expires = 2 * HZ; 33471da177e4SLinus Torvalds cqr->buildclk = get_clock(); 33481da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 33491da177e4SLinus Torvalds 33501da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 33515a27e60dSStefan Weinhuber if (!rc) 33525a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 33531da177e4SLinus Torvalds 3354f932bceaSStefan Weinhuber if (useglobal) 3355f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3356f932bceaSStefan Weinhuber else 33578e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 33581da177e4SLinus Torvalds return rc; 33591da177e4SLinus Torvalds } 33601da177e4SLinus Torvalds 33611da177e4SLinus Torvalds /* 33621da177e4SLinus Torvalds * Reserve device ioctl. 33631da177e4SLinus Torvalds * Options are set to 'synchronous wait for interrupt' and 33641da177e4SLinus Torvalds * 'timeout the request'. This leads to a terminate IO if 33651da177e4SLinus Torvalds * the interrupt is outstanding for a certain time. 33661da177e4SLinus Torvalds */ 33671da177e4SLinus Torvalds static int 33681107ccfbSChristoph Hellwig dasd_eckd_reserve(struct dasd_device *device) 33691da177e4SLinus Torvalds { 33701da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 33711da177e4SLinus Torvalds int rc; 3372f3eb5384SStefan Weinhuber struct ccw1 *ccw; 3373f932bceaSStefan Weinhuber int useglobal; 33741da177e4SLinus Torvalds 33751da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 33761da177e4SLinus Torvalds return -EACCES; 33771da177e4SLinus Torvalds 3378f932bceaSStefan Weinhuber useglobal = 0; 337968b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 33801da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3381f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3382f932bceaSStefan Weinhuber useglobal = 1; 3383f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3384f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3385f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3386f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3387f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3388f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3389f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 33901da177e4SLinus Torvalds } 3391f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 3392f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RESERVE; 3393f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3394f3eb5384SStefan Weinhuber ccw->count = 32; 3395f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 33968e09f215SStefan Weinhuber cqr->startdev = device; 33978e09f215SStefan Weinhuber cqr->memdev = device; 33981da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 33991c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3400336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 34011da177e4SLinus Torvalds cqr->expires = 2 * HZ; 34021da177e4SLinus Torvalds cqr->buildclk = get_clock(); 34031da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 34041da177e4SLinus Torvalds 34051da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 34065a27e60dSStefan Weinhuber if (!rc) 34075a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 34081da177e4SLinus Torvalds 3409f932bceaSStefan Weinhuber if (useglobal) 3410f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3411f932bceaSStefan Weinhuber else 34128e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 34131da177e4SLinus Torvalds return rc; 34141da177e4SLinus Torvalds } 34151da177e4SLinus Torvalds 34161da177e4SLinus Torvalds /* 34171da177e4SLinus Torvalds * Steal lock ioctl - unconditional reserve device. 34181da177e4SLinus Torvalds * Buils a channel programm to break a device's reservation. 34191da177e4SLinus Torvalds * (unconditional reserve) 34201da177e4SLinus Torvalds */ 34211da177e4SLinus Torvalds static int 34221107ccfbSChristoph Hellwig dasd_eckd_steal_lock(struct dasd_device *device) 34231da177e4SLinus Torvalds { 34241da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 34251da177e4SLinus Torvalds int rc; 3426f3eb5384SStefan Weinhuber struct ccw1 *ccw; 3427f932bceaSStefan Weinhuber int useglobal; 34281da177e4SLinus Torvalds 34291da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 34301da177e4SLinus Torvalds return -EACCES; 34311da177e4SLinus Torvalds 3432f932bceaSStefan Weinhuber useglobal = 0; 343368b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 34341da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3435f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3436f932bceaSStefan Weinhuber useglobal = 1; 3437f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3438f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3439f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3440f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3441f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3442f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3443f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 34441da177e4SLinus Torvalds } 3445f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 3446f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SLCK; 3447f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3448f3eb5384SStefan Weinhuber ccw->count = 32; 3449f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 34508e09f215SStefan Weinhuber cqr->startdev = device; 34518e09f215SStefan Weinhuber cqr->memdev = device; 34521da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 34531c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3454336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 34551da177e4SLinus Torvalds cqr->expires = 2 * HZ; 34561da177e4SLinus Torvalds cqr->buildclk = get_clock(); 34571da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 34581da177e4SLinus Torvalds 34591da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 34605a27e60dSStefan Weinhuber if (!rc) 34615a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 34621da177e4SLinus Torvalds 3463f932bceaSStefan Weinhuber if (useglobal) 3464f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3465f932bceaSStefan Weinhuber else 34668e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 34671da177e4SLinus Torvalds return rc; 34681da177e4SLinus Torvalds } 34691da177e4SLinus Torvalds 34701da177e4SLinus Torvalds /* 3471196339f1SStefan Weinhuber * SNID - Sense Path Group ID 3472196339f1SStefan Weinhuber * This ioctl may be used in situations where I/O is stalled due to 3473196339f1SStefan Weinhuber * a reserve, so if the normal dasd_smalloc_request fails, we use the 3474196339f1SStefan Weinhuber * preallocated dasd_reserve_req. 3475196339f1SStefan Weinhuber */ 3476196339f1SStefan Weinhuber static int dasd_eckd_snid(struct dasd_device *device, 3477196339f1SStefan Weinhuber void __user *argp) 3478196339f1SStefan Weinhuber { 3479196339f1SStefan Weinhuber struct dasd_ccw_req *cqr; 3480196339f1SStefan Weinhuber int rc; 3481196339f1SStefan Weinhuber struct ccw1 *ccw; 3482196339f1SStefan Weinhuber int useglobal; 3483196339f1SStefan Weinhuber struct dasd_snid_ioctl_data usrparm; 3484196339f1SStefan Weinhuber 3485196339f1SStefan Weinhuber if (!capable(CAP_SYS_ADMIN)) 3486196339f1SStefan Weinhuber return -EACCES; 3487196339f1SStefan Weinhuber 3488196339f1SStefan Weinhuber if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 3489196339f1SStefan Weinhuber return -EFAULT; 3490196339f1SStefan Weinhuber 3491196339f1SStefan Weinhuber useglobal = 0; 3492196339f1SStefan Weinhuber cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 3493196339f1SStefan Weinhuber sizeof(struct dasd_snid_data), device); 3494196339f1SStefan Weinhuber if (IS_ERR(cqr)) { 3495196339f1SStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3496196339f1SStefan Weinhuber useglobal = 1; 3497196339f1SStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3498196339f1SStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3499196339f1SStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3500196339f1SStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3501196339f1SStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3502196339f1SStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3503196339f1SStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 3504196339f1SStefan Weinhuber } 3505196339f1SStefan Weinhuber ccw = cqr->cpaddr; 3506196339f1SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SNID; 3507196339f1SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3508196339f1SStefan Weinhuber ccw->count = 12; 3509196339f1SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 3510196339f1SStefan Weinhuber cqr->startdev = device; 3511196339f1SStefan Weinhuber cqr->memdev = device; 3512196339f1SStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3513196339f1SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 35145a27e60dSStefan Weinhuber set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 3515196339f1SStefan Weinhuber cqr->retries = 5; 3516196339f1SStefan Weinhuber cqr->expires = 10 * HZ; 3517196339f1SStefan Weinhuber cqr->buildclk = get_clock(); 3518196339f1SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 3519196339f1SStefan Weinhuber cqr->lpm = usrparm.path_mask; 3520196339f1SStefan Weinhuber 3521196339f1SStefan Weinhuber rc = dasd_sleep_on_immediatly(cqr); 3522196339f1SStefan Weinhuber /* verify that I/O processing didn't modify the path mask */ 3523196339f1SStefan Weinhuber if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) 3524196339f1SStefan Weinhuber rc = -EIO; 3525196339f1SStefan Weinhuber if (!rc) { 3526196339f1SStefan Weinhuber usrparm.data = *((struct dasd_snid_data *)cqr->data); 3527196339f1SStefan Weinhuber if (copy_to_user(argp, &usrparm, sizeof(usrparm))) 3528196339f1SStefan Weinhuber rc = -EFAULT; 3529196339f1SStefan Weinhuber } 3530196339f1SStefan Weinhuber 3531196339f1SStefan Weinhuber if (useglobal) 3532196339f1SStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3533196339f1SStefan Weinhuber else 3534196339f1SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 3535196339f1SStefan Weinhuber return rc; 3536196339f1SStefan Weinhuber } 3537196339f1SStefan Weinhuber 3538196339f1SStefan Weinhuber /* 35391da177e4SLinus Torvalds * Read performance statistics 35401da177e4SLinus Torvalds */ 35411da177e4SLinus Torvalds static int 35421107ccfbSChristoph Hellwig dasd_eckd_performance(struct dasd_device *device, void __user *argp) 35431da177e4SLinus Torvalds { 35441da177e4SLinus Torvalds struct dasd_psf_prssd_data *prssdp; 35451da177e4SLinus Torvalds struct dasd_rssd_perf_stats_t *stats; 35461da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 35471da177e4SLinus Torvalds struct ccw1 *ccw; 35481da177e4SLinus Torvalds int rc; 35491da177e4SLinus Torvalds 355068b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 35511da177e4SLinus Torvalds (sizeof(struct dasd_psf_prssd_data) + 35521da177e4SLinus Torvalds sizeof(struct dasd_rssd_perf_stats_t)), 35531da177e4SLinus Torvalds device); 35541da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3555fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 35561da177e4SLinus Torvalds "Could not allocate initialization request"); 35571da177e4SLinus Torvalds return PTR_ERR(cqr); 35581da177e4SLinus Torvalds } 35598e09f215SStefan Weinhuber cqr->startdev = device; 35608e09f215SStefan Weinhuber cqr->memdev = device; 35611da177e4SLinus Torvalds cqr->retries = 0; 3562eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 35631da177e4SLinus Torvalds cqr->expires = 10 * HZ; 35641da177e4SLinus Torvalds 35651da177e4SLinus Torvalds /* Prepare for Read Subsystem Data */ 35661da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 35671da177e4SLinus Torvalds memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 35681da177e4SLinus Torvalds prssdp->order = PSF_ORDER_PRSSD; 35695d67d164SJoe Perches prssdp->suborder = 0x01; /* Performance Statistics */ 35701da177e4SLinus Torvalds prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 35711da177e4SLinus Torvalds 35721da177e4SLinus Torvalds ccw = cqr->cpaddr; 35731da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_PSF; 35741da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_psf_prssd_data); 35751da177e4SLinus Torvalds ccw->flags |= CCW_FLAG_CC; 35761da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) prssdp; 35771da177e4SLinus Torvalds 35781da177e4SLinus Torvalds /* Read Subsystem Data - Performance Statistics */ 35791da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 35801da177e4SLinus Torvalds memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 35811da177e4SLinus Torvalds 35821da177e4SLinus Torvalds ccw++; 35831da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_RSSD; 35841da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 35851da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) stats; 35861da177e4SLinus Torvalds 35871da177e4SLinus Torvalds cqr->buildclk = get_clock(); 35881da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 35891da177e4SLinus Torvalds rc = dasd_sleep_on(cqr); 35901da177e4SLinus Torvalds if (rc == 0) { 35911da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 35921da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 35931107ccfbSChristoph Hellwig if (copy_to_user(argp, stats, 35941107ccfbSChristoph Hellwig sizeof(struct dasd_rssd_perf_stats_t))) 35951107ccfbSChristoph Hellwig rc = -EFAULT; 35961da177e4SLinus Torvalds } 35978e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 35981da177e4SLinus Torvalds return rc; 35991da177e4SLinus Torvalds } 36001da177e4SLinus Torvalds 36011da177e4SLinus Torvalds /* 36021da177e4SLinus Torvalds * Get attributes (cache operations) 36031da177e4SLinus Torvalds * Returnes the cache attributes used in Define Extend (DE). 36041da177e4SLinus Torvalds */ 36051da177e4SLinus Torvalds static int 36061107ccfbSChristoph Hellwig dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 36071da177e4SLinus Torvalds { 36081107ccfbSChristoph Hellwig struct dasd_eckd_private *private = 36091107ccfbSChristoph Hellwig (struct dasd_eckd_private *)device->private; 36101107ccfbSChristoph Hellwig struct attrib_data_t attrib = private->attrib; 36111da177e4SLinus Torvalds int rc; 36121da177e4SLinus Torvalds 36131da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 36141da177e4SLinus Torvalds return -EACCES; 36151107ccfbSChristoph Hellwig if (!argp) 36161da177e4SLinus Torvalds return -EINVAL; 36171da177e4SLinus Torvalds 36181107ccfbSChristoph Hellwig rc = 0; 36191107ccfbSChristoph Hellwig if (copy_to_user(argp, (long *) &attrib, 36201107ccfbSChristoph Hellwig sizeof(struct attrib_data_t))) 36211107ccfbSChristoph Hellwig rc = -EFAULT; 36221da177e4SLinus Torvalds 36231da177e4SLinus Torvalds return rc; 36241da177e4SLinus Torvalds } 36251da177e4SLinus Torvalds 36261da177e4SLinus Torvalds /* 36271da177e4SLinus Torvalds * Set attributes (cache operations) 36281da177e4SLinus Torvalds * Stores the attributes for cache operation to be used in Define Extend (DE). 36291da177e4SLinus Torvalds */ 36301da177e4SLinus Torvalds static int 36311107ccfbSChristoph Hellwig dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 36321da177e4SLinus Torvalds { 36331107ccfbSChristoph Hellwig struct dasd_eckd_private *private = 36341107ccfbSChristoph Hellwig (struct dasd_eckd_private *)device->private; 36351da177e4SLinus Torvalds struct attrib_data_t attrib; 36361da177e4SLinus Torvalds 36371da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 36381da177e4SLinus Torvalds return -EACCES; 36391107ccfbSChristoph Hellwig if (!argp) 36401da177e4SLinus Torvalds return -EINVAL; 36411da177e4SLinus Torvalds 36421107ccfbSChristoph Hellwig if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 36431da177e4SLinus Torvalds return -EFAULT; 36441da177e4SLinus Torvalds private->attrib = attrib; 36451da177e4SLinus Torvalds 3646fc19f381SStefan Haberland dev_info(&device->cdev->dev, 3647fc19f381SStefan Haberland "The DASD cache mode was set to %x (%i cylinder prestage)\n", 36481da177e4SLinus Torvalds private->attrib.operation, private->attrib.nr_cyl); 36491da177e4SLinus Torvalds return 0; 36501da177e4SLinus Torvalds } 36511da177e4SLinus Torvalds 3652ab1d848fSNigel Hislop /* 3653ab1d848fSNigel Hislop * Issue syscall I/O to EMC Symmetrix array. 3654ab1d848fSNigel Hislop * CCWs are PSF and RSSD 3655ab1d848fSNigel Hislop */ 3656ab1d848fSNigel Hislop static int dasd_symm_io(struct dasd_device *device, void __user *argp) 3657ab1d848fSNigel Hislop { 3658ab1d848fSNigel Hislop struct dasd_symmio_parms usrparm; 3659ab1d848fSNigel Hislop char *psf_data, *rssd_result; 3660ab1d848fSNigel Hislop struct dasd_ccw_req *cqr; 3661ab1d848fSNigel Hislop struct ccw1 *ccw; 366252898025SNigel Hislop char psf0, psf1; 3663ab1d848fSNigel Hislop int rc; 3664ab1d848fSNigel Hislop 366552898025SNigel Hislop if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) 366652898025SNigel Hislop return -EACCES; 366752898025SNigel Hislop psf0 = psf1 = 0; 366852898025SNigel Hislop 3669ab1d848fSNigel Hislop /* Copy parms from caller */ 3670ab1d848fSNigel Hislop rc = -EFAULT; 3671ab1d848fSNigel Hislop if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 3672ab1d848fSNigel Hislop goto out; 3673f8b06859SHeiko Carstens if (is_compat_task() || sizeof(long) == 4) { 3674ab1d848fSNigel Hislop /* Make sure pointers are sane even on 31 bit. */ 3675ab1d848fSNigel Hislop rc = -EINVAL; 3676f8b06859SHeiko Carstens if ((usrparm.psf_data >> 32) != 0) 3677ab1d848fSNigel Hislop goto out; 3678f8b06859SHeiko Carstens if ((usrparm.rssd_result >> 32) != 0) 3679f8b06859SHeiko Carstens goto out; 3680f8b06859SHeiko Carstens usrparm.psf_data &= 0x7fffffffULL; 3681f8b06859SHeiko Carstens usrparm.rssd_result &= 0x7fffffffULL; 3682ab1d848fSNigel Hislop } 3683ab1d848fSNigel Hislop /* alloc I/O data area */ 3684ab1d848fSNigel Hislop psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 3685ab1d848fSNigel Hislop rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 3686ab1d848fSNigel Hislop if (!psf_data || !rssd_result) { 3687ab1d848fSNigel Hislop rc = -ENOMEM; 3688ab1d848fSNigel Hislop goto out_free; 3689ab1d848fSNigel Hislop } 3690ab1d848fSNigel Hislop 3691ab1d848fSNigel Hislop /* get syscall header from user space */ 3692ab1d848fSNigel Hislop rc = -EFAULT; 3693ab1d848fSNigel Hislop if (copy_from_user(psf_data, 3694ab1d848fSNigel Hislop (void __user *)(unsigned long) usrparm.psf_data, 3695ab1d848fSNigel Hislop usrparm.psf_data_len)) 3696ab1d848fSNigel Hislop goto out_free; 369752898025SNigel Hislop psf0 = psf_data[0]; 369852898025SNigel Hislop psf1 = psf_data[1]; 3699ab1d848fSNigel Hislop 3700ab1d848fSNigel Hislop /* setup CCWs for PSF + RSSD */ 370168b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device); 3702ab1d848fSNigel Hislop if (IS_ERR(cqr)) { 3703fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3704ab1d848fSNigel Hislop "Could not allocate initialization request"); 3705ab1d848fSNigel Hislop rc = PTR_ERR(cqr); 3706ab1d848fSNigel Hislop goto out_free; 3707ab1d848fSNigel Hislop } 3708ab1d848fSNigel Hislop 3709ab1d848fSNigel Hislop cqr->startdev = device; 3710ab1d848fSNigel Hislop cqr->memdev = device; 3711ab1d848fSNigel Hislop cqr->retries = 3; 3712ab1d848fSNigel Hislop cqr->expires = 10 * HZ; 3713ab1d848fSNigel Hislop cqr->buildclk = get_clock(); 3714ab1d848fSNigel Hislop cqr->status = DASD_CQR_FILLED; 3715ab1d848fSNigel Hislop 3716ab1d848fSNigel Hislop /* Build the ccws */ 3717ab1d848fSNigel Hislop ccw = cqr->cpaddr; 3718ab1d848fSNigel Hislop 3719ab1d848fSNigel Hislop /* PSF ccw */ 3720ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_PSF; 3721ab1d848fSNigel Hislop ccw->count = usrparm.psf_data_len; 3722ab1d848fSNigel Hislop ccw->flags |= CCW_FLAG_CC; 3723ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) psf_data; 3724ab1d848fSNigel Hislop 3725ab1d848fSNigel Hislop ccw++; 3726ab1d848fSNigel Hislop 3727ab1d848fSNigel Hislop /* RSSD ccw */ 3728ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_RSSD; 3729ab1d848fSNigel Hislop ccw->count = usrparm.rssd_result_len; 3730ab1d848fSNigel Hislop ccw->flags = CCW_FLAG_SLI ; 3731ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) rssd_result; 3732ab1d848fSNigel Hislop 3733ab1d848fSNigel Hislop rc = dasd_sleep_on(cqr); 3734ab1d848fSNigel Hislop if (rc) 3735ab1d848fSNigel Hislop goto out_sfree; 3736ab1d848fSNigel Hislop 3737ab1d848fSNigel Hislop rc = -EFAULT; 3738ab1d848fSNigel Hislop if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 3739ab1d848fSNigel Hislop rssd_result, usrparm.rssd_result_len)) 3740ab1d848fSNigel Hislop goto out_sfree; 3741ab1d848fSNigel Hislop rc = 0; 3742ab1d848fSNigel Hislop 3743ab1d848fSNigel Hislop out_sfree: 3744ab1d848fSNigel Hislop dasd_sfree_request(cqr, cqr->memdev); 3745ab1d848fSNigel Hislop out_free: 3746ab1d848fSNigel Hislop kfree(rssd_result); 3747ab1d848fSNigel Hislop kfree(psf_data); 3748ab1d848fSNigel Hislop out: 374952898025SNigel Hislop DBF_DEV_EVENT(DBF_WARNING, device, 375052898025SNigel Hislop "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", 375152898025SNigel Hislop (int) psf0, (int) psf1, rc); 3752ab1d848fSNigel Hislop return rc; 3753ab1d848fSNigel Hislop } 3754ab1d848fSNigel Hislop 37551107ccfbSChristoph Hellwig static int 37568e09f215SStefan Weinhuber dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 37571107ccfbSChristoph Hellwig { 37588e09f215SStefan Weinhuber struct dasd_device *device = block->base; 37598e09f215SStefan Weinhuber 37601107ccfbSChristoph Hellwig switch (cmd) { 37611107ccfbSChristoph Hellwig case BIODASDGATTR: 37621107ccfbSChristoph Hellwig return dasd_eckd_get_attrib(device, argp); 37631107ccfbSChristoph Hellwig case BIODASDSATTR: 37641107ccfbSChristoph Hellwig return dasd_eckd_set_attrib(device, argp); 37651107ccfbSChristoph Hellwig case BIODASDPSRD: 37661107ccfbSChristoph Hellwig return dasd_eckd_performance(device, argp); 37671107ccfbSChristoph Hellwig case BIODASDRLSE: 37681107ccfbSChristoph Hellwig return dasd_eckd_release(device); 37691107ccfbSChristoph Hellwig case BIODASDRSRV: 37701107ccfbSChristoph Hellwig return dasd_eckd_reserve(device); 37711107ccfbSChristoph Hellwig case BIODASDSLCK: 37721107ccfbSChristoph Hellwig return dasd_eckd_steal_lock(device); 3773196339f1SStefan Weinhuber case BIODASDSNID: 3774196339f1SStefan Weinhuber return dasd_eckd_snid(device, argp); 3775ab1d848fSNigel Hislop case BIODASDSYMMIO: 3776ab1d848fSNigel Hislop return dasd_symm_io(device, argp); 37771107ccfbSChristoph Hellwig default: 37781107ccfbSChristoph Hellwig return -ENOIOCTLCMD; 37791107ccfbSChristoph Hellwig } 37801107ccfbSChristoph Hellwig } 37811107ccfbSChristoph Hellwig 37821da177e4SLinus Torvalds /* 3783445b5b49SHorst Hummel * Dump the range of CCWs into 'page' buffer 3784445b5b49SHorst Hummel * and return number of printed chars. 3785445b5b49SHorst Hummel */ 37864d284cacSHeiko Carstens static int 3787445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 3788445b5b49SHorst Hummel { 3789445b5b49SHorst Hummel int len, count; 3790445b5b49SHorst Hummel char *datap; 3791445b5b49SHorst Hummel 3792445b5b49SHorst Hummel len = 0; 3793445b5b49SHorst Hummel while (from <= to) { 3794445b5b49SHorst Hummel len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3795445b5b49SHorst Hummel " CCW %p: %08X %08X DAT:", 3796445b5b49SHorst Hummel from, ((int *) from)[0], ((int *) from)[1]); 3797445b5b49SHorst Hummel 3798445b5b49SHorst Hummel /* get pointer to data (consider IDALs) */ 3799445b5b49SHorst Hummel if (from->flags & CCW_FLAG_IDA) 3800445b5b49SHorst Hummel datap = (char *) *((addr_t *) (addr_t) from->cda); 3801445b5b49SHorst Hummel else 3802445b5b49SHorst Hummel datap = (char *) ((addr_t) from->cda); 3803445b5b49SHorst Hummel 3804445b5b49SHorst Hummel /* dump data (max 32 bytes) */ 3805445b5b49SHorst Hummel for (count = 0; count < from->count && count < 32; count++) { 3806445b5b49SHorst Hummel if (count % 8 == 0) len += sprintf(page + len, " "); 3807445b5b49SHorst Hummel if (count % 4 == 0) len += sprintf(page + len, " "); 3808445b5b49SHorst Hummel len += sprintf(page + len, "%02x", datap[count]); 3809445b5b49SHorst Hummel } 3810445b5b49SHorst Hummel len += sprintf(page + len, "\n"); 3811445b5b49SHorst Hummel from++; 3812445b5b49SHorst Hummel } 3813445b5b49SHorst Hummel return len; 3814445b5b49SHorst Hummel } 3815445b5b49SHorst Hummel 3816fc19f381SStefan Haberland static void 3817aeec92caSStefan Haberland dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 3818aeec92caSStefan Haberland char *reason) 3819fc19f381SStefan Haberland { 3820fc19f381SStefan Haberland u64 *sense; 3821a5a0061fSStefan Weinhuber u64 *stat; 3822fc19f381SStefan Haberland 3823aeec92caSStefan Haberland sense = (u64 *) dasd_get_sense(irb); 3824a5a0061fSStefan Weinhuber stat = (u64 *) &irb->scsw; 3825fc19f381SStefan Haberland if (sense) { 3826a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " 3827a5a0061fSStefan Weinhuber "%016llx %016llx %016llx %016llx", 3828a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 3829ed3640b2SStefan Haberland sense[0], sense[1], sense[2], sense[3]); 3830fc19f381SStefan Haberland } else { 3831a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", 3832a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 3833a5a0061fSStefan Weinhuber "NO VALID SENSE"); 3834fc19f381SStefan Haberland } 3835fc19f381SStefan Haberland } 3836fc19f381SStefan Haberland 3837445b5b49SHorst Hummel /* 38381da177e4SLinus Torvalds * Print sense data and related channel program. 38391da177e4SLinus Torvalds * Parts are printed because printk buffer is only 1024 bytes. 38401da177e4SLinus Torvalds */ 3841f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 38428e09f215SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 38431da177e4SLinus Torvalds { 38441da177e4SLinus Torvalds char *page; 3845445b5b49SHorst Hummel struct ccw1 *first, *last, *fail, *from, *to; 3846445b5b49SHorst Hummel int len, sl, sct; 38471da177e4SLinus Torvalds 38481da177e4SLinus Torvalds page = (char *) get_zeroed_page(GFP_ATOMIC); 38491da177e4SLinus Torvalds if (page == NULL) { 3850fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3851fc19f381SStefan Haberland "No memory to dump sense data\n"); 38521da177e4SLinus Torvalds return; 38531da177e4SLinus Torvalds } 3854445b5b49SHorst Hummel /* dump the sense data */ 38551da177e4SLinus Torvalds len = sprintf(page, KERN_ERR PRINTK_HEADER 38561da177e4SLinus Torvalds " I/O status report for device %s:\n", 38572a0217d5SKay Sievers dev_name(&device->cdev->dev)); 38581da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3859a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 3860a5a0061fSStefan Weinhuber "CS:%02X RC:%d\n", 3861a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 3862a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 3863a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 3864a5a0061fSStefan Weinhuber req ? req->intrc : 0); 38651da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 38661da177e4SLinus Torvalds " device %s: Failing CCW: %p\n", 38672a0217d5SKay Sievers dev_name(&device->cdev->dev), 386823d805b6SPeter Oberparleiter (void *) (addr_t) irb->scsw.cmd.cpa); 38691da177e4SLinus Torvalds if (irb->esw.esw0.erw.cons) { 38701da177e4SLinus Torvalds for (sl = 0; sl < 4; sl++) { 38711da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 38721da177e4SLinus Torvalds " Sense(hex) %2d-%2d:", 38731da177e4SLinus Torvalds (8 * sl), ((8 * sl) + 7)); 38741da177e4SLinus Torvalds 38751da177e4SLinus Torvalds for (sct = 0; sct < 8; sct++) { 38761da177e4SLinus Torvalds len += sprintf(page + len, " %02x", 38771da177e4SLinus Torvalds irb->ecw[8 * sl + sct]); 38781da177e4SLinus Torvalds } 38791da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 38801da177e4SLinus Torvalds } 38811da177e4SLinus Torvalds 38821da177e4SLinus Torvalds if (irb->ecw[27] & DASD_SENSE_BIT_0) { 38831da177e4SLinus Torvalds /* 24 Byte Sense Data */ 3884445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 38851da177e4SLinus Torvalds " 24 Byte: %x MSG %x, " 38861da177e4SLinus Torvalds "%s MSGb to SYSOP\n", 38871da177e4SLinus Torvalds irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 38881da177e4SLinus Torvalds irb->ecw[1] & 0x10 ? "" : "no"); 38891da177e4SLinus Torvalds } else { 38901da177e4SLinus Torvalds /* 32 Byte Sense Data */ 3891445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 38921da177e4SLinus Torvalds " 32 Byte: Format: %x " 38931da177e4SLinus Torvalds "Exception class %x\n", 38941da177e4SLinus Torvalds irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 38951da177e4SLinus Torvalds } 38961da177e4SLinus Torvalds } else { 3897445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 38981da177e4SLinus Torvalds " SORRY - NO VALID SENSE AVAILABLE\n"); 38991da177e4SLinus Torvalds } 3900445b5b49SHorst Hummel printk("%s", page); 39011da177e4SLinus Torvalds 39028e09f215SStefan Weinhuber if (req) { 39038e09f215SStefan Weinhuber /* req == NULL for unsolicited interrupts */ 3904445b5b49SHorst Hummel /* dump the Channel Program (max 140 Bytes per line) */ 3905445b5b49SHorst Hummel /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 3906445b5b49SHorst Hummel first = req->cpaddr; 3907445b5b49SHorst Hummel for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 3908445b5b49SHorst Hummel to = min(first + 6, last); 39091da177e4SLinus Torvalds len = sprintf(page, KERN_ERR PRINTK_HEADER 39101da177e4SLinus Torvalds " Related CP in req: %p\n", req); 3911445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(first, to, page + len); 3912445b5b49SHorst Hummel printk("%s", page); 39131da177e4SLinus Torvalds 3914445b5b49SHorst Hummel /* print failing CCW area (maximum 4) */ 3915445b5b49SHorst Hummel /* scsw->cda is either valid or zero */ 39161da177e4SLinus Torvalds len = 0; 3917445b5b49SHorst Hummel from = ++to; 391823d805b6SPeter Oberparleiter fail = (struct ccw1 *)(addr_t) 391923d805b6SPeter Oberparleiter irb->scsw.cmd.cpa; /* failing CCW */ 3920445b5b49SHorst Hummel if (from < fail - 2) { 3921445b5b49SHorst Hummel from = fail - 2; /* there is a gap - print header */ 3922445b5b49SHorst Hummel len += sprintf(page, KERN_ERR PRINTK_HEADER "......\n"); 39231da177e4SLinus Torvalds } 3924445b5b49SHorst Hummel to = min(fail + 1, last); 3925445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, to, page + len); 39261da177e4SLinus Torvalds 3927445b5b49SHorst Hummel /* print last CCWs (maximum 2) */ 3928445b5b49SHorst Hummel from = max(from, ++to); 3929445b5b49SHorst Hummel if (from < last - 1) { 3930445b5b49SHorst Hummel from = last - 1; /* there is a gap - print header */ 39311da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n"); 39321da177e4SLinus Torvalds } 3933445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, last, page + len); 39341da177e4SLinus Torvalds if (len > 0) 3935445b5b49SHorst Hummel printk("%s", page); 39368e09f215SStefan Weinhuber } 39371da177e4SLinus Torvalds free_page((unsigned long) page); 39381da177e4SLinus Torvalds } 39391da177e4SLinus Torvalds 3940f3eb5384SStefan Weinhuber 3941f3eb5384SStefan Weinhuber /* 3942f3eb5384SStefan Weinhuber * Print sense data from a tcw. 3943f3eb5384SStefan Weinhuber */ 3944f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 3945f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 3946f3eb5384SStefan Weinhuber { 3947f3eb5384SStefan Weinhuber char *page; 3948f3eb5384SStefan Weinhuber int len, sl, sct, residual; 3949f3eb5384SStefan Weinhuber struct tsb *tsb; 3950ef19298bSStefan Weinhuber u8 *sense, *rcq; 3951f3eb5384SStefan Weinhuber 3952f3eb5384SStefan Weinhuber page = (char *) get_zeroed_page(GFP_ATOMIC); 3953f3eb5384SStefan Weinhuber if (page == NULL) { 3954fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, " %s", 3955f3eb5384SStefan Weinhuber "No memory to dump sense data"); 3956f3eb5384SStefan Weinhuber return; 3957f3eb5384SStefan Weinhuber } 3958f3eb5384SStefan Weinhuber /* dump the sense data */ 3959f3eb5384SStefan Weinhuber len = sprintf(page, KERN_ERR PRINTK_HEADER 3960f3eb5384SStefan Weinhuber " I/O status report for device %s:\n", 3961f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev)); 3962f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3963a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 3964a5a0061fSStefan Weinhuber "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", 3965a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 3966a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 3967a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 3968a5a0061fSStefan Weinhuber irb->scsw.tm.fcxs, irb->scsw.tm.schxs, 3969a5a0061fSStefan Weinhuber req ? req->intrc : 0); 3970f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3971f3eb5384SStefan Weinhuber " device %s: Failing TCW: %p\n", 3972f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev), 3973f3eb5384SStefan Weinhuber (void *) (addr_t) irb->scsw.tm.tcw); 3974f3eb5384SStefan Weinhuber 3975f3eb5384SStefan Weinhuber tsb = NULL; 3976f3eb5384SStefan Weinhuber sense = NULL; 3977a5a0061fSStefan Weinhuber if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) 3978f3eb5384SStefan Weinhuber tsb = tcw_get_tsb( 3979f3eb5384SStefan Weinhuber (struct tcw *)(unsigned long)irb->scsw.tm.tcw); 3980f3eb5384SStefan Weinhuber 3981b8fde722SStefan Haberland if (tsb) { 3982f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3983f3eb5384SStefan Weinhuber " tsb->length %d\n", tsb->length); 3984f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3985f3eb5384SStefan Weinhuber " tsb->flags %x\n", tsb->flags); 3986f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3987f3eb5384SStefan Weinhuber " tsb->dcw_offset %d\n", tsb->dcw_offset); 3988f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3989f3eb5384SStefan Weinhuber " tsb->count %d\n", tsb->count); 3990f3eb5384SStefan Weinhuber residual = tsb->count - 28; 3991f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3992f3eb5384SStefan Weinhuber " residual %d\n", residual); 3993f3eb5384SStefan Weinhuber 3994f3eb5384SStefan Weinhuber switch (tsb->flags & 0x07) { 3995f3eb5384SStefan Weinhuber case 1: /* tsa_iostat */ 3996f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3997f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_time %d\n", 3998f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_time); 3999f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4000f3eb5384SStefan Weinhuber " tsb->tsa.iostat.def_time %d\n", 4001f3eb5384SStefan Weinhuber tsb->tsa.iostat.def_time); 4002f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4003f3eb5384SStefan Weinhuber " tsb->tsa.iostat.queue_time %d\n", 4004f3eb5384SStefan Weinhuber tsb->tsa.iostat.queue_time); 4005f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4006f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_busy_time %d\n", 4007f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_busy_time); 4008f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4009f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_act_time %d\n", 4010f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_act_time); 4011f3eb5384SStefan Weinhuber sense = tsb->tsa.iostat.sense; 4012f3eb5384SStefan Weinhuber break; 4013f3eb5384SStefan Weinhuber case 2: /* ts_ddpc */ 4014f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4015f3eb5384SStefan Weinhuber " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); 4016ef19298bSStefan Weinhuber for (sl = 0; sl < 2; sl++) { 4017ef19298bSStefan Weinhuber len += sprintf(page + len, 4018ef19298bSStefan Weinhuber KERN_ERR PRINTK_HEADER 4019ef19298bSStefan Weinhuber " tsb->tsa.ddpc.rcq %2d-%2d: ", 4020ef19298bSStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 4021ef19298bSStefan Weinhuber rcq = tsb->tsa.ddpc.rcq; 4022f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 4023f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 4024ef19298bSStefan Weinhuber rcq[8 * sl + sct]); 4025f3eb5384SStefan Weinhuber } 4026f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 4027f3eb5384SStefan Weinhuber } 4028f3eb5384SStefan Weinhuber sense = tsb->tsa.ddpc.sense; 4029f3eb5384SStefan Weinhuber break; 4030f3eb5384SStefan Weinhuber case 3: /* tsa_intrg */ 4031f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 4032f3eb5384SStefan Weinhuber " tsb->tsa.intrg.: not supportet yet \n"); 4033f3eb5384SStefan Weinhuber break; 4034f3eb5384SStefan Weinhuber } 4035f3eb5384SStefan Weinhuber 4036f3eb5384SStefan Weinhuber if (sense) { 4037f3eb5384SStefan Weinhuber for (sl = 0; sl < 4; sl++) { 4038f3eb5384SStefan Weinhuber len += sprintf(page + len, 4039f3eb5384SStefan Weinhuber KERN_ERR PRINTK_HEADER 4040f3eb5384SStefan Weinhuber " Sense(hex) %2d-%2d:", 4041f3eb5384SStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 4042f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 4043f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 4044f3eb5384SStefan Weinhuber sense[8 * sl + sct]); 4045f3eb5384SStefan Weinhuber } 4046f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 4047f3eb5384SStefan Weinhuber } 4048f3eb5384SStefan Weinhuber 4049f3eb5384SStefan Weinhuber if (sense[27] & DASD_SENSE_BIT_0) { 4050f3eb5384SStefan Weinhuber /* 24 Byte Sense Data */ 4051f3eb5384SStefan Weinhuber sprintf(page + len, KERN_ERR PRINTK_HEADER 4052f3eb5384SStefan Weinhuber " 24 Byte: %x MSG %x, " 4053f3eb5384SStefan Weinhuber "%s MSGb to SYSOP\n", 4054f3eb5384SStefan Weinhuber sense[7] >> 4, sense[7] & 0x0f, 4055f3eb5384SStefan Weinhuber sense[1] & 0x10 ? "" : "no"); 4056f3eb5384SStefan Weinhuber } else { 4057f3eb5384SStefan Weinhuber /* 32 Byte Sense Data */ 4058f3eb5384SStefan Weinhuber sprintf(page + len, KERN_ERR PRINTK_HEADER 4059f3eb5384SStefan Weinhuber " 32 Byte: Format: %x " 4060f3eb5384SStefan Weinhuber "Exception class %x\n", 4061f3eb5384SStefan Weinhuber sense[6] & 0x0f, sense[22] >> 4); 4062f3eb5384SStefan Weinhuber } 4063f3eb5384SStefan Weinhuber } else { 4064f3eb5384SStefan Weinhuber sprintf(page + len, KERN_ERR PRINTK_HEADER 4065f3eb5384SStefan Weinhuber " SORRY - NO VALID SENSE AVAILABLE\n"); 4066f3eb5384SStefan Weinhuber } 4067f3eb5384SStefan Weinhuber } else { 4068f3eb5384SStefan Weinhuber sprintf(page + len, KERN_ERR PRINTK_HEADER 4069f3eb5384SStefan Weinhuber " SORRY - NO TSB DATA AVAILABLE\n"); 4070f3eb5384SStefan Weinhuber } 4071f3eb5384SStefan Weinhuber printk("%s", page); 4072f3eb5384SStefan Weinhuber free_page((unsigned long) page); 4073f3eb5384SStefan Weinhuber } 4074f3eb5384SStefan Weinhuber 4075f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense(struct dasd_device *device, 4076f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 4077f3eb5384SStefan Weinhuber { 4078a5a0061fSStefan Weinhuber if (scsw_is_tm(&irb->scsw)) 4079f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_tcw(device, req, irb); 4080f3eb5384SStefan Weinhuber else 4081f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_ccw(device, req, irb); 4082f3eb5384SStefan Weinhuber } 4083f3eb5384SStefan Weinhuber 4084501183f2SStefan Haberland static int dasd_eckd_pm_freeze(struct dasd_device *device) 4085d41dd122SStefan Haberland { 4086d41dd122SStefan Haberland /* 4087d41dd122SStefan Haberland * the device should be disconnected from our LCU structure 4088d41dd122SStefan Haberland * on restore we will reconnect it and reread LCU specific 4089d41dd122SStefan Haberland * information like PAV support that might have changed 4090d41dd122SStefan Haberland */ 4091d41dd122SStefan Haberland dasd_alias_remove_device(device); 4092d41dd122SStefan Haberland dasd_alias_disconnect_device_from_lcu(device); 4093d41dd122SStefan Haberland 4094d41dd122SStefan Haberland return 0; 4095d41dd122SStefan Haberland } 4096d41dd122SStefan Haberland 4097501183f2SStefan Haberland static int dasd_eckd_restore_device(struct dasd_device *device) 4098d41dd122SStefan Haberland { 4099d41dd122SStefan Haberland struct dasd_eckd_private *private; 41006fca97a9SStefan Haberland struct dasd_eckd_characteristics temp_rdc_data; 4101d41dd122SStefan Haberland int is_known, rc; 4102d41dd122SStefan Haberland struct dasd_uid temp_uid; 4103a7602f6cSStefan Haberland unsigned long flags; 4104d41dd122SStefan Haberland 4105d41dd122SStefan Haberland private = (struct dasd_eckd_private *) device->private; 4106d41dd122SStefan Haberland 4107d41dd122SStefan Haberland /* Read Configuration Data */ 4108d41dd122SStefan Haberland rc = dasd_eckd_read_conf(device); 4109d41dd122SStefan Haberland if (rc) 4110d41dd122SStefan Haberland goto out_err; 4111d41dd122SStefan Haberland 41122dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 41132dedf0d9SStefan Haberland /* Generate device unique id */ 41142dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 41152dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4116d41dd122SStefan Haberland if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) 4117a7602f6cSStefan Haberland dev_err(&device->cdev->dev, "The UID of the DASD has " 4118a7602f6cSStefan Haberland "changed\n"); 41192dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4120d41dd122SStefan Haberland if (rc) 4121d41dd122SStefan Haberland goto out_err; 4122d41dd122SStefan Haberland 4123d41dd122SStefan Haberland /* register lcu with alias handling, enable PAV if this is a new lcu */ 4124d41dd122SStefan Haberland is_known = dasd_alias_make_device_known_to_lcu(device); 4125d41dd122SStefan Haberland if (is_known < 0) 4126d41dd122SStefan Haberland return is_known; 4127d41dd122SStefan Haberland if (!is_known) { 4128f4ac1d02SStefan Weinhuber dasd_eckd_validate_server(device); 4129f4ac1d02SStefan Weinhuber dasd_alias_lcu_setup_complete(device); 4130f4ac1d02SStefan Weinhuber } else 4131f4ac1d02SStefan Weinhuber dasd_alias_wait_for_lcu_setup(device); 4132f4ac1d02SStefan Weinhuber 4133f4ac1d02SStefan Weinhuber /* RE-Read Configuration Data */ 4134f4ac1d02SStefan Weinhuber rc = dasd_eckd_read_conf(device); 4135d41dd122SStefan Haberland if (rc) 4136d41dd122SStefan Haberland goto out_err; 4137d41dd122SStefan Haberland 4138d41dd122SStefan Haberland /* Read Feature Codes */ 413968d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 4140d41dd122SStefan Haberland 4141d41dd122SStefan Haberland /* Read Device Characteristics */ 414268b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 41436fca97a9SStefan Haberland &temp_rdc_data, 64); 4144d41dd122SStefan Haberland if (rc) { 4145b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 4146b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 4147d41dd122SStefan Haberland goto out_err; 4148d41dd122SStefan Haberland } 4149a7602f6cSStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 41506fca97a9SStefan Haberland memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data)); 4151a7602f6cSStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4152d41dd122SStefan Haberland 4153d41dd122SStefan Haberland /* add device to alias management */ 4154d41dd122SStefan Haberland dasd_alias_add_device(device); 4155d41dd122SStefan Haberland 4156d41dd122SStefan Haberland return 0; 4157d41dd122SStefan Haberland 4158d41dd122SStefan Haberland out_err: 4159e6125fbaSStefan Haberland return -1; 4160d41dd122SStefan Haberland } 4161d41dd122SStefan Haberland 4162501183f2SStefan Haberland static int dasd_eckd_reload_device(struct dasd_device *device) 4163501183f2SStefan Haberland { 4164501183f2SStefan Haberland struct dasd_eckd_private *private; 4165501183f2SStefan Haberland int rc, old_base; 41662dedf0d9SStefan Haberland char print_uid[60]; 41672dedf0d9SStefan Haberland struct dasd_uid uid; 41682dedf0d9SStefan Haberland unsigned long flags; 4169501183f2SStefan Haberland 4170501183f2SStefan Haberland private = (struct dasd_eckd_private *) device->private; 41712dedf0d9SStefan Haberland 41722dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4173501183f2SStefan Haberland old_base = private->uid.base_unit_addr; 41742dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 41752dedf0d9SStefan Haberland 4176501183f2SStefan Haberland /* Read Configuration Data */ 4177501183f2SStefan Haberland rc = dasd_eckd_read_conf(device); 4178501183f2SStefan Haberland if (rc) 4179501183f2SStefan Haberland goto out_err; 4180501183f2SStefan Haberland 41812dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 4182501183f2SStefan Haberland if (rc) 4183501183f2SStefan Haberland goto out_err; 4184501183f2SStefan Haberland /* 4185501183f2SStefan Haberland * update unit address configuration and 4186501183f2SStefan Haberland * add device to alias management 4187501183f2SStefan Haberland */ 4188501183f2SStefan Haberland dasd_alias_update_add_device(device); 4189501183f2SStefan Haberland 41902dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &uid); 41912dedf0d9SStefan Haberland 41922dedf0d9SStefan Haberland if (old_base != uid.base_unit_addr) { 41932dedf0d9SStefan Haberland if (strlen(uid.vduit) > 0) 41942dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 41952dedf0d9SStefan Haberland "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial, 41962dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr, uid.vduit); 4197501183f2SStefan Haberland else 41982dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 41992dedf0d9SStefan Haberland "%s.%s.%04x.%02x", uid.vendor, uid.serial, 42002dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr); 4201501183f2SStefan Haberland 4202501183f2SStefan Haberland dev_info(&device->cdev->dev, 4203501183f2SStefan Haberland "An Alias device was reassigned to a new base device " 42042dedf0d9SStefan Haberland "with UID: %s\n", print_uid); 4205501183f2SStefan Haberland } 4206501183f2SStefan Haberland return 0; 4207501183f2SStefan Haberland 4208501183f2SStefan Haberland out_err: 4209501183f2SStefan Haberland return -1; 4210501183f2SStefan Haberland } 4211501183f2SStefan Haberland 4212d41dd122SStefan Haberland static struct ccw_driver dasd_eckd_driver = { 42133bda058bSSebastian Ott .driver = { 4214d41dd122SStefan Haberland .name = "dasd-eckd", 4215d41dd122SStefan Haberland .owner = THIS_MODULE, 42163bda058bSSebastian Ott }, 4217d41dd122SStefan Haberland .ids = dasd_eckd_ids, 4218d41dd122SStefan Haberland .probe = dasd_eckd_probe, 4219d41dd122SStefan Haberland .remove = dasd_generic_remove, 4220d41dd122SStefan Haberland .set_offline = dasd_generic_set_offline, 4221d41dd122SStefan Haberland .set_online = dasd_eckd_set_online, 4222d41dd122SStefan Haberland .notify = dasd_generic_notify, 4223a4d26c6aSStefan Weinhuber .path_event = dasd_generic_path_event, 4224d41dd122SStefan Haberland .freeze = dasd_generic_pm_freeze, 4225d41dd122SStefan Haberland .thaw = dasd_generic_restore_device, 4226d41dd122SStefan Haberland .restore = dasd_generic_restore_device, 4227a23ed009SStefan Haberland .uc_handler = dasd_generic_uc_handler, 4228de400d6bSPeter Oberparleiter .int_class = IOINT_DAS, 4229d41dd122SStefan Haberland }; 4230f3eb5384SStefan Weinhuber 42311da177e4SLinus Torvalds /* 42321da177e4SLinus Torvalds * max_blocks is dependent on the amount of storage that is available 42331da177e4SLinus Torvalds * in the static io buffer for each device. Currently each device has 42341da177e4SLinus Torvalds * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has 42351da177e4SLinus Torvalds * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use 42361da177e4SLinus Torvalds * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In 42371da177e4SLinus Torvalds * addition we have one define extent ccw + 16 bytes of data and one 42381da177e4SLinus Torvalds * locate record ccw + 16 bytes of data. That makes: 42391da177e4SLinus Torvalds * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. 42401da177e4SLinus Torvalds * We want to fit two into the available memory so that we can immediately 42411da177e4SLinus Torvalds * start the next request if one finishes off. That makes 249.5 blocks 42421da177e4SLinus Torvalds * for one request. Give a little safety and the result is 240. 42431da177e4SLinus Torvalds */ 42441da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline = { 42451da177e4SLinus Torvalds .owner = THIS_MODULE, 42461da177e4SLinus Torvalds .name = "ECKD", 42471da177e4SLinus Torvalds .ebcname = "ECKD", 4248ef19298bSStefan Weinhuber .max_blocks = 190, 42491da177e4SLinus Torvalds .check_device = dasd_eckd_check_characteristics, 42508e09f215SStefan Weinhuber .uncheck_device = dasd_eckd_uncheck_device, 42511da177e4SLinus Torvalds .do_analysis = dasd_eckd_do_analysis, 4252a4d26c6aSStefan Weinhuber .verify_path = dasd_eckd_verify_path, 42538e09f215SStefan Weinhuber .ready_to_online = dasd_eckd_ready_to_online, 42548e09f215SStefan Weinhuber .online_to_ready = dasd_eckd_online_to_ready, 42551da177e4SLinus Torvalds .fill_geometry = dasd_eckd_fill_geometry, 42561da177e4SLinus Torvalds .start_IO = dasd_start_IO, 42571da177e4SLinus Torvalds .term_IO = dasd_term_IO, 42588e09f215SStefan Weinhuber .handle_terminated_request = dasd_eckd_handle_terminated_request, 42591da177e4SLinus Torvalds .format_device = dasd_eckd_format_device, 42601da177e4SLinus Torvalds .erp_action = dasd_eckd_erp_action, 42611da177e4SLinus Torvalds .erp_postaction = dasd_eckd_erp_postaction, 42625a27e60dSStefan Weinhuber .check_for_device_change = dasd_eckd_check_for_device_change, 42638e09f215SStefan Weinhuber .build_cp = dasd_eckd_build_alias_cp, 42648e09f215SStefan Weinhuber .free_cp = dasd_eckd_free_alias_cp, 42651da177e4SLinus Torvalds .dump_sense = dasd_eckd_dump_sense, 4266fc19f381SStefan Haberland .dump_sense_dbf = dasd_eckd_dump_sense_dbf, 42671da177e4SLinus Torvalds .fill_info = dasd_eckd_fill_info, 42681107ccfbSChristoph Hellwig .ioctl = dasd_eckd_ioctl, 4269d41dd122SStefan Haberland .freeze = dasd_eckd_pm_freeze, 4270d41dd122SStefan Haberland .restore = dasd_eckd_restore_device, 4271501183f2SStefan Haberland .reload = dasd_eckd_reload_device, 42722dedf0d9SStefan Haberland .get_uid = dasd_eckd_get_uid, 42731da177e4SLinus Torvalds }; 42741da177e4SLinus Torvalds 42751da177e4SLinus Torvalds static int __init 42761da177e4SLinus Torvalds dasd_eckd_init(void) 42771da177e4SLinus Torvalds { 4278736e6ea0SSebastian Ott int ret; 4279736e6ea0SSebastian Ott 42801da177e4SLinus Torvalds ASCEBC(dasd_eckd_discipline.ebcname, 4); 4281f932bceaSStefan Weinhuber dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), 4282f932bceaSStefan Weinhuber GFP_KERNEL | GFP_DMA); 4283f932bceaSStefan Weinhuber if (!dasd_reserve_req) 4284f932bceaSStefan Weinhuber return -ENOMEM; 4285a4d26c6aSStefan Weinhuber path_verification_worker = kmalloc(sizeof(*path_verification_worker), 4286a4d26c6aSStefan Weinhuber GFP_KERNEL | GFP_DMA); 4287a4d26c6aSStefan Weinhuber if (!path_verification_worker) { 4288a4d26c6aSStefan Weinhuber kfree(dasd_reserve_req); 4289a4d26c6aSStefan Weinhuber return -ENOMEM; 4290a4d26c6aSStefan Weinhuber } 4291736e6ea0SSebastian Ott ret = ccw_driver_register(&dasd_eckd_driver); 4292736e6ea0SSebastian Ott if (!ret) 4293736e6ea0SSebastian Ott wait_for_device_probe(); 4294a4d26c6aSStefan Weinhuber else { 4295a4d26c6aSStefan Weinhuber kfree(path_verification_worker); 4296f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 4297a4d26c6aSStefan Weinhuber } 4298736e6ea0SSebastian Ott return ret; 42991da177e4SLinus Torvalds } 43001da177e4SLinus Torvalds 43011da177e4SLinus Torvalds static void __exit 43021da177e4SLinus Torvalds dasd_eckd_cleanup(void) 43031da177e4SLinus Torvalds { 43041da177e4SLinus Torvalds ccw_driver_unregister(&dasd_eckd_driver); 4305a4d26c6aSStefan Weinhuber kfree(path_verification_worker); 4306f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 43071da177e4SLinus Torvalds } 43081da177e4SLinus Torvalds 43091da177e4SLinus Torvalds module_init(dasd_eckd_init); 43101da177e4SLinus Torvalds module_exit(dasd_eckd_cleanup); 4311