11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> 31da177e4SLinus Torvalds * Horst Hummel <Horst.Hummel@de.ibm.com> 41da177e4SLinus Torvalds * Carsten Otte <Cotte@de.ibm.com> 51da177e4SLinus Torvalds * Martin Schwidefsky <schwidefsky@de.ibm.com> 61da177e4SLinus Torvalds * Bugreports.to..: <Linux390@de.ibm.com> 7d41dd122SStefan Haberland * Copyright IBM Corp. 1999, 2009 8ab1d848fSNigel Hislop * EMC Symmetrix ioctl Copyright EMC Corporation, 2008 9ab1d848fSNigel Hislop * Author.........: Nigel Hislop <hislop_nigel@emc.com> 101da177e4SLinus Torvalds */ 111da177e4SLinus Torvalds 12ca99dab0SStefan Haberland #define KMSG_COMPONENT "dasd-eckd" 13fc19f381SStefan Haberland 141da177e4SLinus Torvalds #include <linux/stddef.h> 151da177e4SLinus Torvalds #include <linux/kernel.h> 161da177e4SLinus Torvalds #include <linux/slab.h> 171da177e4SLinus Torvalds #include <linux/hdreg.h> /* HDIO_GETGEO */ 181da177e4SLinus Torvalds #include <linux/bio.h> 191da177e4SLinus Torvalds #include <linux/module.h> 20048cd4e5SHeiko Carstens #include <linux/compat.h> 211da177e4SLinus Torvalds #include <linux/init.h> 221da177e4SLinus Torvalds 23382b7366SSebastian Ott #include <asm/css_chars.h> 241da177e4SLinus Torvalds #include <asm/debug.h> 251da177e4SLinus Torvalds #include <asm/idals.h> 261da177e4SLinus Torvalds #include <asm/ebcdic.h> 271da177e4SLinus Torvalds #include <asm/io.h> 281da177e4SLinus Torvalds #include <asm/uaccess.h> 2940545573SHorst Hummel #include <asm/cio.h> 301da177e4SLinus Torvalds #include <asm/ccwdev.h> 31f3eb5384SStefan Weinhuber #include <asm/itcw.h> 321da177e4SLinus Torvalds 331da177e4SLinus Torvalds #include "dasd_int.h" 341da177e4SLinus Torvalds #include "dasd_eckd.h" 351da177e4SLinus Torvalds 361da177e4SLinus Torvalds #ifdef PRINTK_HEADER 371da177e4SLinus Torvalds #undef PRINTK_HEADER 381da177e4SLinus Torvalds #endif /* PRINTK_HEADER */ 391da177e4SLinus Torvalds #define PRINTK_HEADER "dasd(eckd):" 401da177e4SLinus Torvalds 411da177e4SLinus Torvalds #define ECKD_C0(i) (i->home_bytes) 421da177e4SLinus Torvalds #define ECKD_F(i) (i->formula) 431da177e4SLinus Torvalds #define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\ 441da177e4SLinus Torvalds (i->factors.f_0x02.f1)) 451da177e4SLinus Torvalds #define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\ 461da177e4SLinus Torvalds (i->factors.f_0x02.f2)) 471da177e4SLinus Torvalds #define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\ 481da177e4SLinus Torvalds (i->factors.f_0x02.f3)) 491da177e4SLinus Torvalds #define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0) 501da177e4SLinus Torvalds #define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0) 511da177e4SLinus Torvalds #define ECKD_F6(i) (i->factor6) 521da177e4SLinus Torvalds #define ECKD_F7(i) (i->factor7) 531da177e4SLinus Torvalds #define ECKD_F8(i) (i->factor8) 541da177e4SLinus Torvalds 55e4dbb0f2SStefan Haberland /* 56e4dbb0f2SStefan Haberland * raw track access always map to 64k in memory 57e4dbb0f2SStefan Haberland * so it maps to 16 blocks of 4k per track 58e4dbb0f2SStefan Haberland */ 59e4dbb0f2SStefan Haberland #define DASD_RAW_BLOCK_PER_TRACK 16 60e4dbb0f2SStefan Haberland #define DASD_RAW_BLOCKSIZE 4096 61e4dbb0f2SStefan Haberland /* 64k are 128 x 512 byte sectors */ 62e4dbb0f2SStefan Haberland #define DASD_RAW_SECTORS_PER_TRACK 128 63e4dbb0f2SStefan Haberland 641da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 651da177e4SLinus Torvalds 661da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline; 671da177e4SLinus Torvalds 681da177e4SLinus Torvalds /* The ccw bus type uses this table to find devices that it sends to 691da177e4SLinus Torvalds * dasd_eckd_probe */ 701da177e4SLinus Torvalds static struct ccw_device_id dasd_eckd_ids[] = { 71d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1}, 72d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2}, 735da24b76SStefan Haberland { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3380, 0), .driver_info = 0x3}, 74d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4}, 75d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5}, 76d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6}, 77d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7}, 78d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8}, 79d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9}, 80d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa}, 811da177e4SLinus Torvalds { /* end of list */ }, 821da177e4SLinus Torvalds }; 831da177e4SLinus Torvalds 841da177e4SLinus Torvalds MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids); 851da177e4SLinus Torvalds 861da177e4SLinus Torvalds static struct ccw_driver dasd_eckd_driver; /* see below */ 871da177e4SLinus Torvalds 88558b9ef0SStefan Weinhuber static void *rawpadpage; 89558b9ef0SStefan Weinhuber 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 1443bc9fef9SStefan Haberland /* head and record addresses of count_area read in analysis ccw */ 1453bc9fef9SStefan Haberland static const int count_area_head[] = { 0, 0, 0, 0, 2 }; 1463bc9fef9SStefan Haberland static const int count_area_rec[] = { 1, 2, 3, 4, 1 }; 1473bc9fef9SStefan Haberland 1481da177e4SLinus Torvalds static inline unsigned int 1491da177e4SLinus Torvalds round_up_multiple(unsigned int no, unsigned int mult) 1501da177e4SLinus Torvalds { 1511da177e4SLinus Torvalds int rem = no % mult; 1521da177e4SLinus Torvalds return (rem ? no - rem + mult : no); 1531da177e4SLinus Torvalds } 1541da177e4SLinus Torvalds 1551da177e4SLinus Torvalds static inline unsigned int 1561da177e4SLinus Torvalds ceil_quot(unsigned int d1, unsigned int d2) 1571da177e4SLinus Torvalds { 1581da177e4SLinus Torvalds return (d1 + (d2 - 1)) / d2; 1591da177e4SLinus Torvalds } 1601da177e4SLinus Torvalds 1614d284cacSHeiko Carstens static unsigned int 1621da177e4SLinus Torvalds recs_per_track(struct dasd_eckd_characteristics * rdc, 1631da177e4SLinus Torvalds unsigned int kl, unsigned int dl) 1641da177e4SLinus Torvalds { 1651da177e4SLinus Torvalds int dn, kn; 1661da177e4SLinus Torvalds 1671da177e4SLinus Torvalds switch (rdc->dev_type) { 1681da177e4SLinus Torvalds case 0x3380: 1691da177e4SLinus Torvalds if (kl) 1701da177e4SLinus Torvalds return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + 1711da177e4SLinus Torvalds ceil_quot(dl + 12, 32)); 1721da177e4SLinus Torvalds else 1731da177e4SLinus Torvalds return 1499 / (15 + ceil_quot(dl + 12, 32)); 1741da177e4SLinus Torvalds case 0x3390: 1751da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1761da177e4SLinus Torvalds if (kl) { 1771da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1781da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + 1791da177e4SLinus Torvalds 9 + ceil_quot(dl + 6 * dn, 34)); 1801da177e4SLinus Torvalds } else 1811da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); 1821da177e4SLinus Torvalds case 0x9345: 1831da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1841da177e4SLinus Torvalds if (kl) { 1851da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1861da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + 1871da177e4SLinus Torvalds ceil_quot(dl + 6 * dn, 34)); 1881da177e4SLinus Torvalds } else 1891da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); 1901da177e4SLinus Torvalds } 1911da177e4SLinus Torvalds return 0; 1921da177e4SLinus Torvalds } 1931da177e4SLinus Torvalds 194b44b0ab3SStefan Weinhuber static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head) 195b44b0ab3SStefan Weinhuber { 196b44b0ab3SStefan Weinhuber geo->cyl = (__u16) cyl; 197b44b0ab3SStefan Weinhuber geo->head = cyl >> 16; 198b44b0ab3SStefan Weinhuber geo->head <<= 4; 199b44b0ab3SStefan Weinhuber geo->head |= head; 200b44b0ab3SStefan Weinhuber } 201b44b0ab3SStefan Weinhuber 2024d284cacSHeiko Carstens static int 2031da177e4SLinus Torvalds check_XRC (struct ccw1 *de_ccw, 2041da177e4SLinus Torvalds struct DE_eckd_data *data, 2051da177e4SLinus Torvalds struct dasd_device *device) 2061da177e4SLinus Torvalds { 2071da177e4SLinus Torvalds struct dasd_eckd_private *private; 208d54853efSMartin Schwidefsky int rc; 2091da177e4SLinus Torvalds 2101da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 211d54853efSMartin Schwidefsky if (!private->rdc_data.facilities.XRC_supported) 212d54853efSMartin Schwidefsky return 0; 2131da177e4SLinus Torvalds 2141da177e4SLinus Torvalds /* switch on System Time Stamp - needed for XRC Support */ 2151da177e4SLinus Torvalds data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ 2161da177e4SLinus Torvalds data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ 2171da177e4SLinus Torvalds 218d54853efSMartin Schwidefsky rc = get_sync_clock(&data->ep_sys_time); 219d54853efSMartin Schwidefsky /* Ignore return code if sync clock is switched off. */ 220a8f6db4dSHeiko Carstens if (rc == -EOPNOTSUPP || rc == -EACCES) 221d54853efSMartin Schwidefsky rc = 0; 2221da177e4SLinus Torvalds 2231da177e4SLinus Torvalds de_ccw->count = sizeof(struct DE_eckd_data); 2241da177e4SLinus Torvalds de_ccw->flags |= CCW_FLAG_SLI; 225d54853efSMartin Schwidefsky return rc; 2261da177e4SLinus Torvalds } 2271da177e4SLinus Torvalds 2284d284cacSHeiko Carstens static int 229b44b0ab3SStefan Weinhuber define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk, 230b44b0ab3SStefan Weinhuber unsigned int totrk, int cmd, struct dasd_device *device) 2311da177e4SLinus Torvalds { 2321da177e4SLinus Torvalds struct dasd_eckd_private *private; 233b44b0ab3SStefan Weinhuber u32 begcyl, endcyl; 234b44b0ab3SStefan Weinhuber u16 heads, beghead, endhead; 235d54853efSMartin Schwidefsky int rc = 0; 2361da177e4SLinus Torvalds 2371da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 2381da177e4SLinus Torvalds 2391da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; 2401da177e4SLinus Torvalds ccw->flags = 0; 2411da177e4SLinus Torvalds ccw->count = 16; 2421da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 2431da177e4SLinus Torvalds 2441da177e4SLinus Torvalds memset(data, 0, sizeof(struct DE_eckd_data)); 2451da177e4SLinus Torvalds switch (cmd) { 2461da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 2471da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 2481da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 2491da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 2501da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 2511da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 2521da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 2531da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 2541da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_COUNT: 2551da177e4SLinus Torvalds data->mask.perm = 0x1; 2561da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 2571da177e4SLinus Torvalds break; 2581da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 2591da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 2601da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 2611da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 2621da177e4SLinus Torvalds data->mask.perm = 0x02; 2631da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 264d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2651da177e4SLinus Torvalds break; 2661da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 2671da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 2681da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 269d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2701da177e4SLinus Torvalds break; 2711da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 2721da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 2731da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 2741da177e4SLinus Torvalds data->mask.perm = 0x3; 2751da177e4SLinus Torvalds data->mask.auth = 0x1; 2761da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 277d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2781da177e4SLinus Torvalds break; 2791da177e4SLinus Torvalds default: 280fc19f381SStefan Haberland dev_err(&device->cdev->dev, 281fc19f381SStefan Haberland "0x%x is not a known command\n", cmd); 2821da177e4SLinus Torvalds break; 2831da177e4SLinus Torvalds } 2841da177e4SLinus Torvalds 2851da177e4SLinus Torvalds data->attributes.mode = 0x3; /* ECKD */ 2861da177e4SLinus Torvalds 2871da177e4SLinus Torvalds if ((private->rdc_data.cu_type == 0x2105 || 2881da177e4SLinus Torvalds private->rdc_data.cu_type == 0x2107 || 2891da177e4SLinus Torvalds private->rdc_data.cu_type == 0x1750) 2901da177e4SLinus Torvalds && !(private->uses_cdl && trk < 2)) 2911da177e4SLinus Torvalds data->ga_extended |= 0x40; /* Regular Data Format Mode */ 2921da177e4SLinus Torvalds 293b44b0ab3SStefan Weinhuber heads = private->rdc_data.trk_per_cyl; 294b44b0ab3SStefan Weinhuber begcyl = trk / heads; 295b44b0ab3SStefan Weinhuber beghead = trk % heads; 296b44b0ab3SStefan Weinhuber endcyl = totrk / heads; 297b44b0ab3SStefan Weinhuber endhead = totrk % heads; 2981da177e4SLinus Torvalds 2991da177e4SLinus Torvalds /* check for sequential prestage - enhance cylinder range */ 3001da177e4SLinus Torvalds if (data->attributes.operation == DASD_SEQ_PRESTAGE || 3011da177e4SLinus Torvalds data->attributes.operation == DASD_SEQ_ACCESS) { 3021da177e4SLinus Torvalds 303b44b0ab3SStefan Weinhuber if (endcyl + private->attrib.nr_cyl < private->real_cyl) 304b44b0ab3SStefan Weinhuber endcyl += private->attrib.nr_cyl; 3051da177e4SLinus Torvalds else 306b44b0ab3SStefan Weinhuber endcyl = (private->real_cyl - 1); 3071da177e4SLinus Torvalds } 3081da177e4SLinus Torvalds 309b44b0ab3SStefan Weinhuber set_ch_t(&data->beg_ext, begcyl, beghead); 310b44b0ab3SStefan Weinhuber set_ch_t(&data->end_ext, endcyl, endhead); 311d54853efSMartin Schwidefsky return rc; 3121da177e4SLinus Torvalds } 3131da177e4SLinus Torvalds 3148e09f215SStefan Weinhuber static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata, 3158e09f215SStefan Weinhuber struct dasd_device *device) 3168e09f215SStefan Weinhuber { 3178e09f215SStefan Weinhuber struct dasd_eckd_private *private; 3188e09f215SStefan Weinhuber int rc; 3198e09f215SStefan Weinhuber 3208e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 3218e09f215SStefan Weinhuber if (!private->rdc_data.facilities.XRC_supported) 3228e09f215SStefan Weinhuber return 0; 3238e09f215SStefan Weinhuber 3248e09f215SStefan Weinhuber /* switch on System Time Stamp - needed for XRC Support */ 325f3eb5384SStefan Weinhuber pfxdata->define_extent.ga_extended |= 0x08; /* 'Time Stamp Valid' */ 326f3eb5384SStefan Weinhuber pfxdata->define_extent.ga_extended |= 0x02; /* 'Extended Parameter' */ 3278e09f215SStefan Weinhuber pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */ 3288e09f215SStefan Weinhuber 329f3eb5384SStefan Weinhuber rc = get_sync_clock(&pfxdata->define_extent.ep_sys_time); 3308e09f215SStefan Weinhuber /* Ignore return code if sync clock is switched off. */ 331a8f6db4dSHeiko Carstens if (rc == -EOPNOTSUPP || rc == -EACCES) 3328e09f215SStefan Weinhuber rc = 0; 3338e09f215SStefan Weinhuber return rc; 3348e09f215SStefan Weinhuber } 3358e09f215SStefan Weinhuber 336f3eb5384SStefan Weinhuber static void fill_LRE_data(struct LRE_eckd_data *data, unsigned int trk, 337f3eb5384SStefan Weinhuber unsigned int rec_on_trk, int count, int cmd, 338f3eb5384SStefan Weinhuber struct dasd_device *device, unsigned int reclen, 339f3eb5384SStefan Weinhuber unsigned int tlf) 340f3eb5384SStefan Weinhuber { 341f3eb5384SStefan Weinhuber struct dasd_eckd_private *private; 342f3eb5384SStefan Weinhuber int sector; 343f3eb5384SStefan Weinhuber int dn, d; 344f3eb5384SStefan Weinhuber 345f3eb5384SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 346f3eb5384SStefan Weinhuber 347f3eb5384SStefan Weinhuber memset(data, 0, sizeof(*data)); 348f3eb5384SStefan Weinhuber sector = 0; 349f3eb5384SStefan Weinhuber if (rec_on_trk) { 350f3eb5384SStefan Weinhuber switch (private->rdc_data.dev_type) { 351f3eb5384SStefan Weinhuber case 0x3390: 352f3eb5384SStefan Weinhuber dn = ceil_quot(reclen + 6, 232); 353f3eb5384SStefan Weinhuber d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 354f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 355f3eb5384SStefan Weinhuber break; 356f3eb5384SStefan Weinhuber case 0x3380: 357f3eb5384SStefan Weinhuber d = 7 + ceil_quot(reclen + 12, 32); 358f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 359f3eb5384SStefan Weinhuber break; 360f3eb5384SStefan Weinhuber } 361f3eb5384SStefan Weinhuber } 362f3eb5384SStefan Weinhuber data->sector = sector; 363f3eb5384SStefan Weinhuber /* note: meaning of count depends on the operation 364f3eb5384SStefan Weinhuber * for record based I/O it's the number of records, but for 365f3eb5384SStefan Weinhuber * track based I/O it's the number of tracks 366f3eb5384SStefan Weinhuber */ 367f3eb5384SStefan Weinhuber data->count = count; 368f3eb5384SStefan Weinhuber switch (cmd) { 369f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 370f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 371f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 372f3eb5384SStefan Weinhuber break; 373f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_HOME_ADDRESS: 374f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 375f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 376f3eb5384SStefan Weinhuber break; 377f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 378f3eb5384SStefan Weinhuber data->operation.orientation = 0x1; 379f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 380f3eb5384SStefan Weinhuber data->count++; 381f3eb5384SStefan Weinhuber break; 382f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_RECORD_ZERO: 383f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 384f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 385f3eb5384SStefan Weinhuber data->count++; 386f3eb5384SStefan Weinhuber break; 387f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE: 388f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_MT: 389f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD: 390f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD_MT: 391f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 392f3eb5384SStefan Weinhuber data->length = reclen; 393f3eb5384SStefan Weinhuber data->operation.operation = 0x01; 394f3eb5384SStefan Weinhuber break; 395f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD: 396f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD_MT: 397f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 398f3eb5384SStefan Weinhuber data->length = reclen; 399f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 400f3eb5384SStefan Weinhuber break; 401e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_WRITE_FULL_TRACK: 402e4dbb0f2SStefan Haberland data->operation.orientation = 0x0; 403e4dbb0f2SStefan Haberland data->operation.operation = 0x3F; 404e4dbb0f2SStefan Haberland data->extended_operation = 0x11; 405e4dbb0f2SStefan Haberland data->length = 0; 406e4dbb0f2SStefan Haberland data->extended_parameter_length = 0x02; 407e4dbb0f2SStefan Haberland if (data->count > 8) { 408e4dbb0f2SStefan Haberland data->extended_parameter[0] = 0xFF; 409e4dbb0f2SStefan Haberland data->extended_parameter[1] = 0xFF; 410e4dbb0f2SStefan Haberland data->extended_parameter[1] <<= (16 - count); 411e4dbb0f2SStefan Haberland } else { 412e4dbb0f2SStefan Haberland data->extended_parameter[0] = 0xFF; 413e4dbb0f2SStefan Haberland data->extended_parameter[0] <<= (8 - count); 414e4dbb0f2SStefan Haberland data->extended_parameter[1] = 0x00; 415e4dbb0f2SStefan Haberland } 416e4dbb0f2SStefan Haberland data->sector = 0xFF; 417e4dbb0f2SStefan Haberland break; 418f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 419f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 420f3eb5384SStefan Weinhuber data->length = reclen; /* not tlf, as one might think */ 421f3eb5384SStefan Weinhuber data->operation.operation = 0x3F; 422f3eb5384SStefan Weinhuber data->extended_operation = 0x23; 423f3eb5384SStefan Weinhuber break; 424f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ: 425f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_MT: 426f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_KD: 427f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_KD_MT: 428f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 429f3eb5384SStefan Weinhuber data->length = reclen; 430f3eb5384SStefan Weinhuber data->operation.operation = 0x06; 431f3eb5384SStefan Weinhuber break; 432f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD: 433f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD_MT: 434f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 435f3eb5384SStefan Weinhuber data->length = reclen; 436f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 437f3eb5384SStefan Weinhuber break; 438f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_COUNT: 439f3eb5384SStefan Weinhuber data->operation.operation = 0x06; 440f3eb5384SStefan Weinhuber break; 441e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_READ_TRACK: 442e4dbb0f2SStefan Haberland data->operation.orientation = 0x1; 443e4dbb0f2SStefan Haberland data->operation.operation = 0x0C; 444e4dbb0f2SStefan Haberland data->extended_parameter_length = 0; 445e4dbb0f2SStefan Haberland data->sector = 0xFF; 446e4dbb0f2SStefan Haberland break; 447f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 448f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 449f3eb5384SStefan Weinhuber data->length = tlf; 450f3eb5384SStefan Weinhuber data->operation.operation = 0x0C; 451f3eb5384SStefan Weinhuber break; 452f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_ERASE: 453f3eb5384SStefan Weinhuber data->length = reclen; 454f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 455f3eb5384SStefan Weinhuber data->operation.operation = 0x0b; 456f3eb5384SStefan Weinhuber break; 457f3eb5384SStefan Weinhuber default: 458f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, device, 459f3eb5384SStefan Weinhuber "fill LRE unknown opcode 0x%x", cmd); 460f3eb5384SStefan Weinhuber BUG(); 461f3eb5384SStefan Weinhuber } 462f3eb5384SStefan Weinhuber set_ch_t(&data->seek_addr, 463f3eb5384SStefan Weinhuber trk / private->rdc_data.trk_per_cyl, 464f3eb5384SStefan Weinhuber trk % private->rdc_data.trk_per_cyl); 465f3eb5384SStefan Weinhuber data->search_arg.cyl = data->seek_addr.cyl; 466f3eb5384SStefan Weinhuber data->search_arg.head = data->seek_addr.head; 467f3eb5384SStefan Weinhuber data->search_arg.record = rec_on_trk; 468f3eb5384SStefan Weinhuber } 469f3eb5384SStefan Weinhuber 470f3eb5384SStefan Weinhuber static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 471b44b0ab3SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 472f3eb5384SStefan Weinhuber struct dasd_device *basedev, struct dasd_device *startdev, 473f3eb5384SStefan Weinhuber unsigned char format, unsigned int rec_on_trk, int count, 474f3eb5384SStefan Weinhuber unsigned int blksize, unsigned int tlf) 4758e09f215SStefan Weinhuber { 4768e09f215SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 477f3eb5384SStefan Weinhuber struct DE_eckd_data *dedata; 478f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 479b44b0ab3SStefan Weinhuber u32 begcyl, endcyl; 480b44b0ab3SStefan Weinhuber u16 heads, beghead, endhead; 4818e09f215SStefan Weinhuber int rc = 0; 4828e09f215SStefan Weinhuber 4838e09f215SStefan Weinhuber basepriv = (struct dasd_eckd_private *) basedev->private; 4848e09f215SStefan Weinhuber startpriv = (struct dasd_eckd_private *) startdev->private; 485f3eb5384SStefan Weinhuber dedata = &pfxdata->define_extent; 486f3eb5384SStefan Weinhuber lredata = &pfxdata->locate_record; 4878e09f215SStefan Weinhuber 4888e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PFX; 4898e09f215SStefan Weinhuber ccw->flags = 0; 490e4dbb0f2SStefan Haberland if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) { 491e4dbb0f2SStefan Haberland ccw->count = sizeof(*pfxdata) + 2; 492e4dbb0f2SStefan Haberland ccw->cda = (__u32) __pa(pfxdata); 493e4dbb0f2SStefan Haberland memset(pfxdata, 0, sizeof(*pfxdata) + 2); 494e4dbb0f2SStefan Haberland } else { 4958e09f215SStefan Weinhuber ccw->count = sizeof(*pfxdata); 4968e09f215SStefan Weinhuber ccw->cda = (__u32) __pa(pfxdata); 4978e09f215SStefan Weinhuber memset(pfxdata, 0, sizeof(*pfxdata)); 498e4dbb0f2SStefan Haberland } 499e4dbb0f2SStefan Haberland 5008e09f215SStefan Weinhuber /* prefix data */ 501f3eb5384SStefan Weinhuber if (format > 1) { 502f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 503f3eb5384SStefan Weinhuber "PFX LRE unknown format 0x%x", format); 504f3eb5384SStefan Weinhuber BUG(); 505f3eb5384SStefan Weinhuber return -EINVAL; 506f3eb5384SStefan Weinhuber } 507f3eb5384SStefan Weinhuber pfxdata->format = format; 5084abb08c2SStefan Weinhuber pfxdata->base_address = basepriv->ned->unit_addr; 5094abb08c2SStefan Weinhuber pfxdata->base_lss = basepriv->ned->ID; 510f3eb5384SStefan Weinhuber pfxdata->validity.define_extent = 1; 5118e09f215SStefan Weinhuber 5128e09f215SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 5138e09f215SStefan Weinhuber if (startpriv->uid.type != UA_BASE_DEVICE) { 5148e09f215SStefan Weinhuber pfxdata->validity.verify_base = 1; 5158e09f215SStefan Weinhuber if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 5168e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 1; 5178e09f215SStefan Weinhuber } 5188e09f215SStefan Weinhuber 5198e09f215SStefan Weinhuber /* define extend data (mostly)*/ 5208e09f215SStefan Weinhuber switch (cmd) { 5218e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_HOME_ADDRESS: 5228e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_RECORD_ZERO: 5238e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ: 5248e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_MT: 5258e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD: 5268e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD_MT: 5278e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_KD: 5288e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_KD_MT: 5298e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_COUNT: 530f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 531f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 532f3eb5384SStefan Weinhuber break; 533e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_READ_TRACK: 534f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 535f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 536f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 537f3eb5384SStefan Weinhuber dedata->blk_size = 0; 5388e09f215SStefan Weinhuber break; 5398e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE: 5408e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_MT: 5418e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD: 5428e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD_MT: 543f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 544f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 5458e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 5468e09f215SStefan Weinhuber break; 5478e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD: 5488e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD_MT: 549f3eb5384SStefan Weinhuber dedata->attributes.operation = DASD_BYPASS_CACHE; 5508e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 5518e09f215SStefan Weinhuber break; 5528e09f215SStefan Weinhuber case DASD_ECKD_CCW_ERASE: 5538e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 5548e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 555f3eb5384SStefan Weinhuber dedata->mask.perm = 0x3; 556f3eb5384SStefan Weinhuber dedata->mask.auth = 0x1; 557f3eb5384SStefan Weinhuber dedata->attributes.operation = DASD_BYPASS_CACHE; 558f3eb5384SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 559f3eb5384SStefan Weinhuber break; 560e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_WRITE_FULL_TRACK: 561e4dbb0f2SStefan Haberland dedata->mask.perm = 0x03; 562e4dbb0f2SStefan Haberland dedata->attributes.operation = basepriv->attrib.operation; 563e4dbb0f2SStefan Haberland dedata->blk_size = 0; 564e4dbb0f2SStefan Haberland break; 565f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 566f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 567f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 568f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 5698e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 5708e09f215SStefan Weinhuber break; 5718e09f215SStefan Weinhuber default: 572f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 573f3eb5384SStefan Weinhuber "PFX LRE unknown opcode 0x%x", cmd); 574f3eb5384SStefan Weinhuber BUG(); 575f3eb5384SStefan Weinhuber return -EINVAL; 5768e09f215SStefan Weinhuber } 5778e09f215SStefan Weinhuber 578f3eb5384SStefan Weinhuber dedata->attributes.mode = 0x3; /* ECKD */ 5798e09f215SStefan Weinhuber 5808e09f215SStefan Weinhuber if ((basepriv->rdc_data.cu_type == 0x2105 || 5818e09f215SStefan Weinhuber basepriv->rdc_data.cu_type == 0x2107 || 5828e09f215SStefan Weinhuber basepriv->rdc_data.cu_type == 0x1750) 5838e09f215SStefan Weinhuber && !(basepriv->uses_cdl && trk < 2)) 584f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x40; /* Regular Data Format Mode */ 5858e09f215SStefan Weinhuber 586b44b0ab3SStefan Weinhuber heads = basepriv->rdc_data.trk_per_cyl; 587b44b0ab3SStefan Weinhuber begcyl = trk / heads; 588b44b0ab3SStefan Weinhuber beghead = trk % heads; 589b44b0ab3SStefan Weinhuber endcyl = totrk / heads; 590b44b0ab3SStefan Weinhuber endhead = totrk % heads; 5918e09f215SStefan Weinhuber 5928e09f215SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 593f3eb5384SStefan Weinhuber if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 594f3eb5384SStefan Weinhuber dedata->attributes.operation == DASD_SEQ_ACCESS) { 5958e09f215SStefan Weinhuber 596b44b0ab3SStefan Weinhuber if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 597b44b0ab3SStefan Weinhuber endcyl += basepriv->attrib.nr_cyl; 5988e09f215SStefan Weinhuber else 599b44b0ab3SStefan Weinhuber endcyl = (basepriv->real_cyl - 1); 6008e09f215SStefan Weinhuber } 6018e09f215SStefan Weinhuber 602f3eb5384SStefan Weinhuber set_ch_t(&dedata->beg_ext, begcyl, beghead); 603f3eb5384SStefan Weinhuber set_ch_t(&dedata->end_ext, endcyl, endhead); 604f3eb5384SStefan Weinhuber 605f3eb5384SStefan Weinhuber if (format == 1) { 606f3eb5384SStefan Weinhuber fill_LRE_data(lredata, trk, rec_on_trk, count, cmd, 607f3eb5384SStefan Weinhuber basedev, blksize, tlf); 608f3eb5384SStefan Weinhuber } 609f3eb5384SStefan Weinhuber 6108e09f215SStefan Weinhuber return rc; 6118e09f215SStefan Weinhuber } 6128e09f215SStefan Weinhuber 613f3eb5384SStefan Weinhuber static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 614f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 615f3eb5384SStefan Weinhuber struct dasd_device *basedev, struct dasd_device *startdev) 616f3eb5384SStefan Weinhuber { 617f3eb5384SStefan Weinhuber return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev, 618f3eb5384SStefan Weinhuber 0, 0, 0, 0, 0); 619f3eb5384SStefan Weinhuber } 620f3eb5384SStefan Weinhuber 6214d284cacSHeiko Carstens static void 622b44b0ab3SStefan Weinhuber locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk, 623b44b0ab3SStefan Weinhuber unsigned int rec_on_trk, int no_rec, int cmd, 6241da177e4SLinus Torvalds struct dasd_device * device, int reclen) 6251da177e4SLinus Torvalds { 6261da177e4SLinus Torvalds struct dasd_eckd_private *private; 6271da177e4SLinus Torvalds int sector; 6281da177e4SLinus Torvalds int dn, d; 6291da177e4SLinus Torvalds 6301da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 6311da177e4SLinus Torvalds 6321da177e4SLinus Torvalds DBF_DEV_EVENT(DBF_INFO, device, 6331da177e4SLinus Torvalds "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", 6341da177e4SLinus Torvalds trk, rec_on_trk, no_rec, cmd, reclen); 6351da177e4SLinus Torvalds 6361da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; 6371da177e4SLinus Torvalds ccw->flags = 0; 6381da177e4SLinus Torvalds ccw->count = 16; 6391da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 6401da177e4SLinus Torvalds 6411da177e4SLinus Torvalds memset(data, 0, sizeof(struct LO_eckd_data)); 6421da177e4SLinus Torvalds sector = 0; 6431da177e4SLinus Torvalds if (rec_on_trk) { 6441da177e4SLinus Torvalds switch (private->rdc_data.dev_type) { 6451da177e4SLinus Torvalds case 0x3390: 6461da177e4SLinus Torvalds dn = ceil_quot(reclen + 6, 232); 6471da177e4SLinus Torvalds d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 6481da177e4SLinus Torvalds sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 6491da177e4SLinus Torvalds break; 6501da177e4SLinus Torvalds case 0x3380: 6511da177e4SLinus Torvalds d = 7 + ceil_quot(reclen + 12, 32); 6521da177e4SLinus Torvalds sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 6531da177e4SLinus Torvalds break; 6541da177e4SLinus Torvalds } 6551da177e4SLinus Torvalds } 6561da177e4SLinus Torvalds data->sector = sector; 6571da177e4SLinus Torvalds data->count = no_rec; 6581da177e4SLinus Torvalds switch (cmd) { 6591da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 6601da177e4SLinus Torvalds data->operation.orientation = 0x3; 6611da177e4SLinus Torvalds data->operation.operation = 0x03; 6621da177e4SLinus Torvalds break; 6631da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 6641da177e4SLinus Torvalds data->operation.orientation = 0x3; 6651da177e4SLinus Torvalds data->operation.operation = 0x16; 6661da177e4SLinus Torvalds break; 6671da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 6681da177e4SLinus Torvalds data->operation.orientation = 0x1; 6691da177e4SLinus Torvalds data->operation.operation = 0x03; 6701da177e4SLinus Torvalds data->count++; 6711da177e4SLinus Torvalds break; 6721da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 6731da177e4SLinus Torvalds data->operation.orientation = 0x3; 6741da177e4SLinus Torvalds data->operation.operation = 0x16; 6751da177e4SLinus Torvalds data->count++; 6761da177e4SLinus Torvalds break; 6771da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 6781da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 6791da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 6801da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 6811da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6821da177e4SLinus Torvalds data->length = reclen; 6831da177e4SLinus Torvalds data->operation.operation = 0x01; 6841da177e4SLinus Torvalds break; 6851da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 6861da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 6871da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6881da177e4SLinus Torvalds data->length = reclen; 6891da177e4SLinus Torvalds data->operation.operation = 0x03; 6901da177e4SLinus Torvalds break; 6911da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 6921da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 6931da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 6941da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 6951da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6961da177e4SLinus Torvalds data->length = reclen; 6971da177e4SLinus Torvalds data->operation.operation = 0x06; 6981da177e4SLinus Torvalds break; 6991da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 7001da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 7011da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 7021da177e4SLinus Torvalds data->length = reclen; 7031da177e4SLinus Torvalds data->operation.operation = 0x16; 7041da177e4SLinus Torvalds break; 7051da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_COUNT: 7061da177e4SLinus Torvalds data->operation.operation = 0x06; 7071da177e4SLinus Torvalds break; 7081da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 7091da177e4SLinus Torvalds data->length = reclen; 7101da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 7111da177e4SLinus Torvalds data->operation.operation = 0x0b; 7121da177e4SLinus Torvalds break; 7131da177e4SLinus Torvalds default: 714fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record " 715fc19f381SStefan Haberland "opcode 0x%x", cmd); 7161da177e4SLinus Torvalds } 717b44b0ab3SStefan Weinhuber set_ch_t(&data->seek_addr, 718b44b0ab3SStefan Weinhuber trk / private->rdc_data.trk_per_cyl, 719b44b0ab3SStefan Weinhuber trk % private->rdc_data.trk_per_cyl); 720b44b0ab3SStefan Weinhuber data->search_arg.cyl = data->seek_addr.cyl; 721b44b0ab3SStefan Weinhuber data->search_arg.head = data->seek_addr.head; 7221da177e4SLinus Torvalds data->search_arg.record = rec_on_trk; 7231da177e4SLinus Torvalds } 7241da177e4SLinus Torvalds 7251da177e4SLinus Torvalds /* 7261da177e4SLinus Torvalds * Returns 1 if the block is one of the special blocks that needs 7271da177e4SLinus Torvalds * to get read/written with the KD variant of the command. 7281da177e4SLinus Torvalds * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and 7291da177e4SLinus Torvalds * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. 7301da177e4SLinus Torvalds * Luckily the KD variants differ only by one bit (0x08) from the 7311da177e4SLinus Torvalds * normal variant. So don't wonder about code like: 7321da177e4SLinus Torvalds * if (dasd_eckd_cdl_special(blk_per_trk, recid)) 7331da177e4SLinus Torvalds * ccw->cmd_code |= 0x8; 7341da177e4SLinus Torvalds */ 7351da177e4SLinus Torvalds static inline int 7361da177e4SLinus Torvalds dasd_eckd_cdl_special(int blk_per_trk, int recid) 7371da177e4SLinus Torvalds { 7381da177e4SLinus Torvalds if (recid < 3) 7391da177e4SLinus Torvalds return 1; 7401da177e4SLinus Torvalds if (recid < blk_per_trk) 7411da177e4SLinus Torvalds return 0; 7421da177e4SLinus Torvalds if (recid < 2 * blk_per_trk) 7431da177e4SLinus Torvalds return 1; 7441da177e4SLinus Torvalds return 0; 7451da177e4SLinus Torvalds } 7461da177e4SLinus Torvalds 7471da177e4SLinus Torvalds /* 7481da177e4SLinus Torvalds * Returns the record size for the special blocks of the cdl format. 7491da177e4SLinus Torvalds * Only returns something useful if dasd_eckd_cdl_special is true 7501da177e4SLinus Torvalds * for the recid. 7511da177e4SLinus Torvalds */ 7521da177e4SLinus Torvalds static inline int 7531da177e4SLinus Torvalds dasd_eckd_cdl_reclen(int recid) 7541da177e4SLinus Torvalds { 7551da177e4SLinus Torvalds if (recid < 3) 7561da177e4SLinus Torvalds return sizes_trk0[recid]; 7571da177e4SLinus Torvalds return LABEL_SIZE; 7581da177e4SLinus Torvalds } 759b206181dSStefan Haberland /* create unique id from private structure. */ 760b206181dSStefan Haberland static void create_uid(struct dasd_eckd_private *private) 7613d052595SHorst Hummel { 7624abb08c2SStefan Weinhuber int count; 763b206181dSStefan Haberland struct dasd_uid *uid; 7643d052595SHorst Hummel 7652dedf0d9SStefan Haberland uid = &private->uid; 7663d052595SHorst Hummel memset(uid, 0, sizeof(struct dasd_uid)); 7674abb08c2SStefan Weinhuber memcpy(uid->vendor, private->ned->HDA_manufacturer, 7683d052595SHorst Hummel sizeof(uid->vendor) - 1); 7693d052595SHorst Hummel EBCASC(uid->vendor, sizeof(uid->vendor) - 1); 7704abb08c2SStefan Weinhuber memcpy(uid->serial, private->ned->HDA_location, 7713d052595SHorst Hummel sizeof(uid->serial) - 1); 7723d052595SHorst Hummel EBCASC(uid->serial, sizeof(uid->serial) - 1); 7734abb08c2SStefan Weinhuber uid->ssid = private->gneq->subsystemID; 774a419aef8SJoe Perches uid->real_unit_addr = private->ned->unit_addr; 7754abb08c2SStefan Weinhuber if (private->sneq) { 7764abb08c2SStefan Weinhuber uid->type = private->sneq->sua_flags; 7778e09f215SStefan Weinhuber if (uid->type == UA_BASE_PAV_ALIAS) 7784abb08c2SStefan Weinhuber uid->base_unit_addr = private->sneq->base_unit_addr; 7798e09f215SStefan Weinhuber } else { 7808e09f215SStefan Weinhuber uid->type = UA_BASE_DEVICE; 7818e09f215SStefan Weinhuber } 7824abb08c2SStefan Weinhuber if (private->vdsneq) { 7834abb08c2SStefan Weinhuber for (count = 0; count < 16; count++) { 7844abb08c2SStefan Weinhuber sprintf(uid->vduit+2*count, "%02x", 7854abb08c2SStefan Weinhuber private->vdsneq->uit[count]); 7864abb08c2SStefan Weinhuber } 7874abb08c2SStefan Weinhuber } 788b206181dSStefan Haberland } 789b206181dSStefan Haberland 790b206181dSStefan Haberland /* 791b206181dSStefan Haberland * Generate device unique id that specifies the physical device. 792b206181dSStefan Haberland */ 793b206181dSStefan Haberland static int dasd_eckd_generate_uid(struct dasd_device *device) 794b206181dSStefan Haberland { 795b206181dSStefan Haberland struct dasd_eckd_private *private; 796b206181dSStefan Haberland unsigned long flags; 797b206181dSStefan Haberland 798b206181dSStefan Haberland private = (struct dasd_eckd_private *) device->private; 799b206181dSStefan Haberland if (!private) 800b206181dSStefan Haberland return -ENODEV; 801b206181dSStefan Haberland if (!private->ned || !private->gneq) 802b206181dSStefan Haberland return -ENODEV; 803b206181dSStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 804b206181dSStefan Haberland create_uid(private); 8052dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 8063d052595SHorst Hummel return 0; 8073d052595SHorst Hummel } 8083d052595SHorst Hummel 8092dedf0d9SStefan Haberland static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid) 8102dedf0d9SStefan Haberland { 8112dedf0d9SStefan Haberland struct dasd_eckd_private *private; 8122dedf0d9SStefan Haberland unsigned long flags; 8132dedf0d9SStefan Haberland 8142dedf0d9SStefan Haberland if (device->private) { 8152dedf0d9SStefan Haberland private = (struct dasd_eckd_private *)device->private; 8162dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 8172dedf0d9SStefan Haberland *uid = private->uid; 8182dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 8192dedf0d9SStefan Haberland return 0; 8202dedf0d9SStefan Haberland } 8212dedf0d9SStefan Haberland return -EINVAL; 8222dedf0d9SStefan Haberland } 8232dedf0d9SStefan Haberland 824b206181dSStefan Haberland /* 825b206181dSStefan Haberland * compare device UID with data of a given dasd_eckd_private structure 826b206181dSStefan Haberland * return 0 for match 827b206181dSStefan Haberland */ 828b206181dSStefan Haberland static int dasd_eckd_compare_path_uid(struct dasd_device *device, 829b206181dSStefan Haberland struct dasd_eckd_private *private) 830b206181dSStefan Haberland { 831b206181dSStefan Haberland struct dasd_uid device_uid; 832b206181dSStefan Haberland 833b206181dSStefan Haberland create_uid(private); 834b206181dSStefan Haberland dasd_eckd_get_uid(device, &device_uid); 835b206181dSStefan Haberland 836b206181dSStefan Haberland return memcmp(&device_uid, &private->uid, sizeof(struct dasd_uid)); 837b206181dSStefan Haberland } 838b206181dSStefan Haberland 839a4d26c6aSStefan Weinhuber static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device, 840a4d26c6aSStefan Weinhuber struct dasd_ccw_req *cqr, 841a4d26c6aSStefan Weinhuber __u8 *rcd_buffer, 842a4d26c6aSStefan Weinhuber __u8 lpm) 84317283b56SCornelia Huck { 84417283b56SCornelia Huck struct ccw1 *ccw; 845a4d26c6aSStefan Weinhuber /* 846a4d26c6aSStefan Weinhuber * buffer has to start with EBCDIC "V1.0" to show 847a4d26c6aSStefan Weinhuber * support for virtual device SNEQ 848a4d26c6aSStefan Weinhuber */ 849a4d26c6aSStefan Weinhuber rcd_buffer[0] = 0xE5; 850a4d26c6aSStefan Weinhuber rcd_buffer[1] = 0xF1; 851a4d26c6aSStefan Weinhuber rcd_buffer[2] = 0x4B; 852a4d26c6aSStefan Weinhuber rcd_buffer[3] = 0xF0; 85317283b56SCornelia Huck 85417283b56SCornelia Huck ccw = cqr->cpaddr; 855a4d26c6aSStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RCD; 856a4d26c6aSStefan Weinhuber ccw->flags = 0; 85717283b56SCornelia Huck ccw->cda = (__u32)(addr_t)rcd_buffer; 858a4d26c6aSStefan Weinhuber ccw->count = DASD_ECKD_RCD_DATA_SIZE; 859a4d26c6aSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 86017283b56SCornelia Huck 8618e09f215SStefan Weinhuber cqr->startdev = device; 8628e09f215SStefan Weinhuber cqr->memdev = device; 8638e09f215SStefan Weinhuber cqr->block = NULL; 86417283b56SCornelia Huck cqr->expires = 10*HZ; 86517283b56SCornelia Huck cqr->lpm = lpm; 866eb6e199bSStefan Weinhuber cqr->retries = 256; 8671aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 86817283b56SCornelia Huck cqr->status = DASD_CQR_FILLED; 869a4d26c6aSStefan Weinhuber set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 870a4d26c6aSStefan Weinhuber } 871a4d26c6aSStefan Weinhuber 8725915a873SStefan Haberland /* 8735915a873SStefan Haberland * Wakeup helper for read_conf 8745915a873SStefan Haberland * if the cqr is not done and needs some error recovery 8755915a873SStefan Haberland * the buffer has to be re-initialized with the EBCDIC "V1.0" 8765915a873SStefan Haberland * to show support for virtual device SNEQ 8775915a873SStefan Haberland */ 8785915a873SStefan Haberland static void read_conf_cb(struct dasd_ccw_req *cqr, void *data) 8795915a873SStefan Haberland { 8805915a873SStefan Haberland struct ccw1 *ccw; 8815915a873SStefan Haberland __u8 *rcd_buffer; 8825915a873SStefan Haberland 8835915a873SStefan Haberland if (cqr->status != DASD_CQR_DONE) { 8845915a873SStefan Haberland ccw = cqr->cpaddr; 8855915a873SStefan Haberland rcd_buffer = (__u8 *)((addr_t) ccw->cda); 8865915a873SStefan Haberland memset(rcd_buffer, 0, sizeof(*rcd_buffer)); 8875915a873SStefan Haberland 8885915a873SStefan Haberland rcd_buffer[0] = 0xE5; 8895915a873SStefan Haberland rcd_buffer[1] = 0xF1; 8905915a873SStefan Haberland rcd_buffer[2] = 0x4B; 8915915a873SStefan Haberland rcd_buffer[3] = 0xF0; 8925915a873SStefan Haberland } 8935915a873SStefan Haberland dasd_wakeup_cb(cqr, data); 8945915a873SStefan Haberland } 8955915a873SStefan Haberland 896a4d26c6aSStefan Weinhuber static int dasd_eckd_read_conf_immediately(struct dasd_device *device, 897a4d26c6aSStefan Weinhuber struct dasd_ccw_req *cqr, 898a4d26c6aSStefan Weinhuber __u8 *rcd_buffer, 899a4d26c6aSStefan Weinhuber __u8 lpm) 900a4d26c6aSStefan Weinhuber { 901a4d26c6aSStefan Weinhuber struct ciw *ciw; 902a4d26c6aSStefan Weinhuber int rc; 903a4d26c6aSStefan Weinhuber /* 904a4d26c6aSStefan Weinhuber * sanity check: scan for RCD command in extended SenseID data 905a4d26c6aSStefan Weinhuber * some devices do not support RCD 906a4d26c6aSStefan Weinhuber */ 907a4d26c6aSStefan Weinhuber ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 908a4d26c6aSStefan Weinhuber if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) 909a4d26c6aSStefan Weinhuber return -EOPNOTSUPP; 910a4d26c6aSStefan Weinhuber 911a4d26c6aSStefan Weinhuber dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm); 912a4d26c6aSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 9135a27e60dSStefan Weinhuber set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 914a4d26c6aSStefan Weinhuber cqr->retries = 5; 9155915a873SStefan Haberland cqr->callback = read_conf_cb; 916a4d26c6aSStefan Weinhuber rc = dasd_sleep_on_immediatly(cqr); 917a4d26c6aSStefan Weinhuber return rc; 91817283b56SCornelia Huck } 91917283b56SCornelia Huck 92017283b56SCornelia Huck static int dasd_eckd_read_conf_lpm(struct dasd_device *device, 92117283b56SCornelia Huck void **rcd_buffer, 92217283b56SCornelia Huck int *rcd_buffer_size, __u8 lpm) 92317283b56SCornelia Huck { 92417283b56SCornelia Huck struct ciw *ciw; 92517283b56SCornelia Huck char *rcd_buf = NULL; 92617283b56SCornelia Huck int ret; 92717283b56SCornelia Huck struct dasd_ccw_req *cqr; 92817283b56SCornelia Huck 92917283b56SCornelia Huck /* 930a4d26c6aSStefan Weinhuber * sanity check: scan for RCD command in extended SenseID data 931a4d26c6aSStefan Weinhuber * some devices do not support RCD 93217283b56SCornelia Huck */ 93317283b56SCornelia Huck ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 934a4d26c6aSStefan Weinhuber if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) { 93517283b56SCornelia Huck ret = -EOPNOTSUPP; 93617283b56SCornelia Huck goto out_error; 93717283b56SCornelia Huck } 938a4d26c6aSStefan Weinhuber rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA); 93917283b56SCornelia Huck if (!rcd_buf) { 94017283b56SCornelia Huck ret = -ENOMEM; 94117283b56SCornelia Huck goto out_error; 94217283b56SCornelia Huck } 943a4d26c6aSStefan Weinhuber cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, 944a4d26c6aSStefan Weinhuber 0, /* use rcd_buf as data ara */ 945a4d26c6aSStefan Weinhuber device); 94617283b56SCornelia Huck if (IS_ERR(cqr)) { 947a4d26c6aSStefan Weinhuber DBF_DEV_EVENT(DBF_WARNING, device, "%s", 948a4d26c6aSStefan Weinhuber "Could not allocate RCD request"); 949a4d26c6aSStefan Weinhuber ret = -ENOMEM; 95017283b56SCornelia Huck goto out_error; 95117283b56SCornelia Huck } 952a4d26c6aSStefan Weinhuber dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm); 9535915a873SStefan Haberland cqr->callback = read_conf_cb; 95417283b56SCornelia Huck ret = dasd_sleep_on(cqr); 95517283b56SCornelia Huck /* 95617283b56SCornelia Huck * on success we update the user input parms 95717283b56SCornelia Huck */ 9588e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 95917283b56SCornelia Huck if (ret) 96017283b56SCornelia Huck goto out_error; 96117283b56SCornelia Huck 962a4d26c6aSStefan Weinhuber *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE; 96317283b56SCornelia Huck *rcd_buffer = rcd_buf; 96417283b56SCornelia Huck return 0; 96517283b56SCornelia Huck out_error: 96617283b56SCornelia Huck kfree(rcd_buf); 96717283b56SCornelia Huck *rcd_buffer = NULL; 96817283b56SCornelia Huck *rcd_buffer_size = 0; 96917283b56SCornelia Huck return ret; 97017283b56SCornelia Huck } 97117283b56SCornelia Huck 9724abb08c2SStefan Weinhuber static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private) 9734abb08c2SStefan Weinhuber { 9744abb08c2SStefan Weinhuber 9754abb08c2SStefan Weinhuber struct dasd_sneq *sneq; 9764abb08c2SStefan Weinhuber int i, count; 9774abb08c2SStefan Weinhuber 9784abb08c2SStefan Weinhuber private->ned = NULL; 9794abb08c2SStefan Weinhuber private->sneq = NULL; 9804abb08c2SStefan Weinhuber private->vdsneq = NULL; 9814abb08c2SStefan Weinhuber private->gneq = NULL; 9824abb08c2SStefan Weinhuber count = private->conf_len / sizeof(struct dasd_sneq); 9834abb08c2SStefan Weinhuber sneq = (struct dasd_sneq *)private->conf_data; 9844abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 9854abb08c2SStefan Weinhuber if (sneq->flags.identifier == 1 && sneq->format == 1) 9864abb08c2SStefan Weinhuber private->sneq = sneq; 9874abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 1 && sneq->format == 4) 9884abb08c2SStefan Weinhuber private->vdsneq = (struct vd_sneq *)sneq; 9894abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 2) 9904abb08c2SStefan Weinhuber private->gneq = (struct dasd_gneq *)sneq; 9914abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 3 && sneq->res1 == 1) 9924abb08c2SStefan Weinhuber private->ned = (struct dasd_ned *)sneq; 9934abb08c2SStefan Weinhuber sneq++; 9944abb08c2SStefan Weinhuber } 9954abb08c2SStefan Weinhuber if (!private->ned || !private->gneq) { 9964abb08c2SStefan Weinhuber private->ned = NULL; 9974abb08c2SStefan Weinhuber private->sneq = NULL; 9984abb08c2SStefan Weinhuber private->vdsneq = NULL; 9994abb08c2SStefan Weinhuber private->gneq = NULL; 10004abb08c2SStefan Weinhuber return -EINVAL; 10014abb08c2SStefan Weinhuber } 10024abb08c2SStefan Weinhuber return 0; 10034abb08c2SStefan Weinhuber 10044abb08c2SStefan Weinhuber }; 10054abb08c2SStefan Weinhuber 10064abb08c2SStefan Weinhuber static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len) 10074abb08c2SStefan Weinhuber { 10084abb08c2SStefan Weinhuber struct dasd_gneq *gneq; 10094abb08c2SStefan Weinhuber int i, count, found; 10104abb08c2SStefan Weinhuber 10114abb08c2SStefan Weinhuber count = conf_len / sizeof(*gneq); 10124abb08c2SStefan Weinhuber gneq = (struct dasd_gneq *)conf_data; 10134abb08c2SStefan Weinhuber found = 0; 10144abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 10154abb08c2SStefan Weinhuber if (gneq->flags.identifier == 2) { 10164abb08c2SStefan Weinhuber found = 1; 10174abb08c2SStefan Weinhuber break; 10184abb08c2SStefan Weinhuber } 10194abb08c2SStefan Weinhuber gneq++; 10204abb08c2SStefan Weinhuber } 10214abb08c2SStefan Weinhuber if (found) 10224abb08c2SStefan Weinhuber return ((char *)gneq)[18] & 0x07; 10234abb08c2SStefan Weinhuber else 10244abb08c2SStefan Weinhuber return 0; 10254abb08c2SStefan Weinhuber } 10264abb08c2SStefan Weinhuber 10274abb08c2SStefan Weinhuber static int dasd_eckd_read_conf(struct dasd_device *device) 10281da177e4SLinus Torvalds { 10291da177e4SLinus Torvalds void *conf_data; 10301da177e4SLinus Torvalds int conf_len, conf_data_saved; 103155d3a85cSStefan Haberland int rc, path_err; 1032a4d26c6aSStefan Weinhuber __u8 lpm, opm; 1033b206181dSStefan Haberland struct dasd_eckd_private *private, path_private; 1034a4d26c6aSStefan Weinhuber struct dasd_path *path_data; 1035b206181dSStefan Haberland struct dasd_uid *uid; 1036b206181dSStefan Haberland char print_path_uid[60], print_device_uid[60]; 10371da177e4SLinus Torvalds 10381da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 1039a4d26c6aSStefan Weinhuber path_data = &device->path_data; 1040a4d26c6aSStefan Weinhuber opm = ccw_device_get_path_mask(device->cdev); 10411da177e4SLinus Torvalds conf_data_saved = 0; 104255d3a85cSStefan Haberland path_err = 0; 10431da177e4SLinus Torvalds /* get configuration data per operational path */ 10441da177e4SLinus Torvalds for (lpm = 0x80; lpm; lpm>>= 1) { 1045b206181dSStefan Haberland if (!(lpm & opm)) 1046b206181dSStefan Haberland continue; 104717283b56SCornelia Huck rc = dasd_eckd_read_conf_lpm(device, &conf_data, 10481da177e4SLinus Torvalds &conf_len, lpm); 10491da177e4SLinus Torvalds if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ 1050b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 10511da177e4SLinus Torvalds "Read configuration data returned " 1052b8ed5dd5SStefan Haberland "error %d", rc); 10531da177e4SLinus Torvalds return rc; 10541da177e4SLinus Torvalds } 10551da177e4SLinus Torvalds if (conf_data == NULL) { 1056b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1057b8ed5dd5SStefan Haberland "No configuration data " 1058b8ed5dd5SStefan Haberland "retrieved"); 1059a4d26c6aSStefan Weinhuber /* no further analysis possible */ 1060a4d26c6aSStefan Weinhuber path_data->opm |= lpm; 1061d133a960SGabriel Craciunescu continue; /* no error */ 10621da177e4SLinus Torvalds } 10631da177e4SLinus Torvalds /* save first valid configuration data */ 10641da177e4SLinus Torvalds if (!conf_data_saved) { 10654abb08c2SStefan Weinhuber kfree(private->conf_data); 10664abb08c2SStefan Weinhuber private->conf_data = conf_data; 10674abb08c2SStefan Weinhuber private->conf_len = conf_len; 10684abb08c2SStefan Weinhuber if (dasd_eckd_identify_conf_parts(private)) { 10694abb08c2SStefan Weinhuber private->conf_data = NULL; 10704abb08c2SStefan Weinhuber private->conf_len = 0; 10714abb08c2SStefan Weinhuber kfree(conf_data); 10724abb08c2SStefan Weinhuber continue; 10734abb08c2SStefan Weinhuber } 1074b206181dSStefan Haberland /* 1075b206181dSStefan Haberland * build device UID that other path data 1076b206181dSStefan Haberland * can be compared to it 1077b206181dSStefan Haberland */ 1078b206181dSStefan Haberland dasd_eckd_generate_uid(device); 10791da177e4SLinus Torvalds conf_data_saved++; 1080b206181dSStefan Haberland } else { 1081b206181dSStefan Haberland path_private.conf_data = conf_data; 1082b206181dSStefan Haberland path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1083b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts( 1084b206181dSStefan Haberland &path_private)) { 1085b206181dSStefan Haberland path_private.conf_data = NULL; 1086b206181dSStefan Haberland path_private.conf_len = 0; 1087b206181dSStefan Haberland kfree(conf_data); 1088b206181dSStefan Haberland continue; 1089b206181dSStefan Haberland } 1090b206181dSStefan Haberland 1091b206181dSStefan Haberland if (dasd_eckd_compare_path_uid( 1092b206181dSStefan Haberland device, &path_private)) { 1093b206181dSStefan Haberland uid = &path_private.uid; 1094b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1095b206181dSStefan Haberland snprintf(print_path_uid, 1096b206181dSStefan Haberland sizeof(print_path_uid), 1097b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1098b206181dSStefan Haberland uid->vendor, uid->serial, 1099b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1100b206181dSStefan Haberland uid->vduit); 1101b206181dSStefan Haberland else 1102b206181dSStefan Haberland snprintf(print_path_uid, 1103b206181dSStefan Haberland sizeof(print_path_uid), 1104b206181dSStefan Haberland "%s.%s.%04x.%02x", 1105b206181dSStefan Haberland uid->vendor, uid->serial, 1106b206181dSStefan Haberland uid->ssid, 1107b206181dSStefan Haberland uid->real_unit_addr); 1108b206181dSStefan Haberland uid = &private->uid; 1109b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1110b206181dSStefan Haberland snprintf(print_device_uid, 1111b206181dSStefan Haberland sizeof(print_device_uid), 1112b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1113b206181dSStefan Haberland uid->vendor, uid->serial, 1114b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1115b206181dSStefan Haberland uid->vduit); 1116b206181dSStefan Haberland else 1117b206181dSStefan Haberland snprintf(print_device_uid, 1118b206181dSStefan Haberland sizeof(print_device_uid), 1119b206181dSStefan Haberland "%s.%s.%04x.%02x", 1120b206181dSStefan Haberland uid->vendor, uid->serial, 1121b206181dSStefan Haberland uid->ssid, 1122b206181dSStefan Haberland uid->real_unit_addr); 1123b206181dSStefan Haberland dev_err(&device->cdev->dev, 1124b206181dSStefan Haberland "Not all channel paths lead to " 1125b206181dSStefan Haberland "the same device, path %02X leads to " 1126b206181dSStefan Haberland "device %s instead of %s\n", lpm, 1127b206181dSStefan Haberland print_path_uid, print_device_uid); 112855d3a85cSStefan Haberland path_err = -EINVAL; 112955d3a85cSStefan Haberland continue; 1130b206181dSStefan Haberland } 1131b206181dSStefan Haberland 1132b206181dSStefan Haberland path_private.conf_data = NULL; 1133b206181dSStefan Haberland path_private.conf_len = 0; 11341da177e4SLinus Torvalds } 11354abb08c2SStefan Weinhuber switch (dasd_eckd_path_access(conf_data, conf_len)) { 11361da177e4SLinus Torvalds case 0x02: 11371da177e4SLinus Torvalds path_data->npm |= lpm; 11381da177e4SLinus Torvalds break; 11391da177e4SLinus Torvalds case 0x03: 11401da177e4SLinus Torvalds path_data->ppm |= lpm; 11411da177e4SLinus Torvalds break; 11421da177e4SLinus Torvalds } 1143a4d26c6aSStefan Weinhuber path_data->opm |= lpm; 1144b206181dSStefan Haberland 11454abb08c2SStefan Weinhuber if (conf_data != private->conf_data) 11461da177e4SLinus Torvalds kfree(conf_data); 11471da177e4SLinus Torvalds } 1148b206181dSStefan Haberland 114955d3a85cSStefan Haberland return path_err; 11501da177e4SLinus Torvalds } 11511da177e4SLinus Torvalds 1152a4d26c6aSStefan Weinhuber static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm) 1153a4d26c6aSStefan Weinhuber { 1154a4d26c6aSStefan Weinhuber struct dasd_eckd_private *private; 1155a4d26c6aSStefan Weinhuber int mdc; 1156a4d26c6aSStefan Weinhuber u32 fcx_max_data; 1157a4d26c6aSStefan Weinhuber 1158a4d26c6aSStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 1159a4d26c6aSStefan Weinhuber if (private->fcx_max_data) { 1160a4d26c6aSStefan Weinhuber mdc = ccw_device_get_mdc(device->cdev, lpm); 1161a4d26c6aSStefan Weinhuber if ((mdc < 0)) { 1162a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1163a4d26c6aSStefan Weinhuber "Detecting the maximum data size for zHPF " 1164a4d26c6aSStefan Weinhuber "requests failed (rc=%d) for a new path %x\n", 1165a4d26c6aSStefan Weinhuber mdc, lpm); 1166a4d26c6aSStefan Weinhuber return mdc; 1167a4d26c6aSStefan Weinhuber } 1168a4d26c6aSStefan Weinhuber fcx_max_data = mdc * FCX_MAX_DATA_FACTOR; 1169a4d26c6aSStefan Weinhuber if (fcx_max_data < private->fcx_max_data) { 1170a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1171a4d26c6aSStefan Weinhuber "The maximum data size for zHPF requests %u " 1172a4d26c6aSStefan Weinhuber "on a new path %x is below the active maximum " 1173a4d26c6aSStefan Weinhuber "%u\n", fcx_max_data, lpm, 1174a4d26c6aSStefan Weinhuber private->fcx_max_data); 1175a4d26c6aSStefan Weinhuber return -EACCES; 1176a4d26c6aSStefan Weinhuber } 1177a4d26c6aSStefan Weinhuber } 1178a4d26c6aSStefan Weinhuber return 0; 1179a4d26c6aSStefan Weinhuber } 1180a4d26c6aSStefan Weinhuber 1181b206181dSStefan Haberland static int rebuild_device_uid(struct dasd_device *device, 1182b206181dSStefan Haberland struct path_verification_work_data *data) 1183b206181dSStefan Haberland { 1184b206181dSStefan Haberland struct dasd_eckd_private *private; 1185b206181dSStefan Haberland struct dasd_path *path_data; 1186b206181dSStefan Haberland __u8 lpm, opm; 1187b206181dSStefan Haberland int rc; 1188b206181dSStefan Haberland 1189b206181dSStefan Haberland rc = -ENODEV; 1190b206181dSStefan Haberland private = (struct dasd_eckd_private *) device->private; 1191b206181dSStefan Haberland path_data = &device->path_data; 1192b206181dSStefan Haberland opm = device->path_data.opm; 1193b206181dSStefan Haberland 1194b206181dSStefan Haberland for (lpm = 0x80; lpm; lpm >>= 1) { 1195b206181dSStefan Haberland if (!(lpm & opm)) 1196b206181dSStefan Haberland continue; 1197b206181dSStefan Haberland memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1198b206181dSStefan Haberland memset(&data->cqr, 0, sizeof(data->cqr)); 1199b206181dSStefan Haberland data->cqr.cpaddr = &data->ccw; 1200b206181dSStefan Haberland rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1201b206181dSStefan Haberland data->rcd_buffer, 1202b206181dSStefan Haberland lpm); 1203b206181dSStefan Haberland 1204b206181dSStefan Haberland if (rc) { 1205b206181dSStefan Haberland if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */ 1206b206181dSStefan Haberland continue; 1207b206181dSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1208b206181dSStefan Haberland "Read configuration data " 1209b206181dSStefan Haberland "returned error %d", rc); 1210b206181dSStefan Haberland break; 1211b206181dSStefan Haberland } 1212b206181dSStefan Haberland memcpy(private->conf_data, data->rcd_buffer, 1213b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE); 1214b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts(private)) { 1215b206181dSStefan Haberland rc = -ENODEV; 1216b206181dSStefan Haberland } else /* first valid path is enough */ 1217b206181dSStefan Haberland break; 1218b206181dSStefan Haberland } 1219b206181dSStefan Haberland 1220b206181dSStefan Haberland if (!rc) 1221b206181dSStefan Haberland rc = dasd_eckd_generate_uid(device); 1222b206181dSStefan Haberland 1223b206181dSStefan Haberland return rc; 1224b206181dSStefan Haberland } 1225b206181dSStefan Haberland 1226a4d26c6aSStefan Weinhuber static void do_path_verification_work(struct work_struct *work) 1227a4d26c6aSStefan Weinhuber { 1228a4d26c6aSStefan Weinhuber struct path_verification_work_data *data; 1229a4d26c6aSStefan Weinhuber struct dasd_device *device; 1230b206181dSStefan Haberland struct dasd_eckd_private path_private; 1231b206181dSStefan Haberland struct dasd_uid *uid; 1232b206181dSStefan Haberland __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE]; 1233a4d26c6aSStefan Weinhuber __u8 lpm, opm, npm, ppm, epm; 1234a4d26c6aSStefan Weinhuber unsigned long flags; 1235b206181dSStefan Haberland char print_uid[60]; 1236a4d26c6aSStefan Weinhuber int rc; 1237a4d26c6aSStefan Weinhuber 1238a4d26c6aSStefan Weinhuber data = container_of(work, struct path_verification_work_data, worker); 1239a4d26c6aSStefan Weinhuber device = data->device; 1240a4d26c6aSStefan Weinhuber 1241c8d1c0ffSStefan Haberland /* delay path verification until device was resumed */ 1242c8d1c0ffSStefan Haberland if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 1243c8d1c0ffSStefan Haberland schedule_work(work); 1244c8d1c0ffSStefan Haberland return; 1245c8d1c0ffSStefan Haberland } 1246c8d1c0ffSStefan Haberland 1247a4d26c6aSStefan Weinhuber opm = 0; 1248a4d26c6aSStefan Weinhuber npm = 0; 1249a4d26c6aSStefan Weinhuber ppm = 0; 1250a4d26c6aSStefan Weinhuber epm = 0; 1251a4d26c6aSStefan Weinhuber for (lpm = 0x80; lpm; lpm >>= 1) { 1252b206181dSStefan Haberland if (!(lpm & data->tbvpm)) 1253b206181dSStefan Haberland continue; 1254b206181dSStefan Haberland memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1255a4d26c6aSStefan Weinhuber memset(&data->cqr, 0, sizeof(data->cqr)); 1256a4d26c6aSStefan Weinhuber data->cqr.cpaddr = &data->ccw; 1257a4d26c6aSStefan Weinhuber rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1258a4d26c6aSStefan Weinhuber data->rcd_buffer, 1259a4d26c6aSStefan Weinhuber lpm); 1260a4d26c6aSStefan Weinhuber if (!rc) { 1261a4d26c6aSStefan Weinhuber switch (dasd_eckd_path_access(data->rcd_buffer, 1262b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE) 1263b206181dSStefan Haberland ) { 1264a4d26c6aSStefan Weinhuber case 0x02: 1265a4d26c6aSStefan Weinhuber npm |= lpm; 1266a4d26c6aSStefan Weinhuber break; 1267a4d26c6aSStefan Weinhuber case 0x03: 1268a4d26c6aSStefan Weinhuber ppm |= lpm; 1269a4d26c6aSStefan Weinhuber break; 1270a4d26c6aSStefan Weinhuber } 1271a4d26c6aSStefan Weinhuber opm |= lpm; 1272a4d26c6aSStefan Weinhuber } else if (rc == -EOPNOTSUPP) { 1273a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1274a4d26c6aSStefan Weinhuber "path verification: No configuration " 1275a4d26c6aSStefan Weinhuber "data retrieved"); 1276a4d26c6aSStefan Weinhuber opm |= lpm; 1277a4d26c6aSStefan Weinhuber } else if (rc == -EAGAIN) { 1278a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1279a4d26c6aSStefan Weinhuber "path verification: device is stopped," 1280a4d26c6aSStefan Weinhuber " try again later"); 1281a4d26c6aSStefan Weinhuber epm |= lpm; 1282a4d26c6aSStefan Weinhuber } else { 1283a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1284a4d26c6aSStefan Weinhuber "Reading device feature codes failed " 1285a4d26c6aSStefan Weinhuber "(rc=%d) for new path %x\n", rc, lpm); 1286a4d26c6aSStefan Weinhuber continue; 1287a4d26c6aSStefan Weinhuber } 1288a4d26c6aSStefan Weinhuber if (verify_fcx_max_data(device, lpm)) { 1289a4d26c6aSStefan Weinhuber opm &= ~lpm; 1290a4d26c6aSStefan Weinhuber npm &= ~lpm; 1291a4d26c6aSStefan Weinhuber ppm &= ~lpm; 1292b206181dSStefan Haberland continue; 1293b206181dSStefan Haberland } 1294b206181dSStefan Haberland 1295b206181dSStefan Haberland /* 1296b206181dSStefan Haberland * save conf_data for comparison after 1297b206181dSStefan Haberland * rebuild_device_uid may have changed 1298b206181dSStefan Haberland * the original data 1299b206181dSStefan Haberland */ 1300b206181dSStefan Haberland memcpy(&path_rcd_buf, data->rcd_buffer, 1301b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE); 1302b206181dSStefan Haberland path_private.conf_data = (void *) &path_rcd_buf; 1303b206181dSStefan Haberland path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1304b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts(&path_private)) { 1305b206181dSStefan Haberland path_private.conf_data = NULL; 1306b206181dSStefan Haberland path_private.conf_len = 0; 1307b206181dSStefan Haberland continue; 1308b206181dSStefan Haberland } 1309b206181dSStefan Haberland 1310b206181dSStefan Haberland /* 1311b206181dSStefan Haberland * compare path UID with device UID only if at least 1312b206181dSStefan Haberland * one valid path is left 1313b206181dSStefan Haberland * in other case the device UID may have changed and 1314b206181dSStefan Haberland * the first working path UID will be used as device UID 1315b206181dSStefan Haberland */ 1316b206181dSStefan Haberland if (device->path_data.opm && 1317b206181dSStefan Haberland dasd_eckd_compare_path_uid(device, &path_private)) { 1318b206181dSStefan Haberland /* 1319b206181dSStefan Haberland * the comparison was not successful 1320b206181dSStefan Haberland * rebuild the device UID with at least one 1321b206181dSStefan Haberland * known path in case a z/VM hyperswap command 1322b206181dSStefan Haberland * has changed the device 1323b206181dSStefan Haberland * 1324b206181dSStefan Haberland * after this compare again 1325b206181dSStefan Haberland * 1326b206181dSStefan Haberland * if either the rebuild or the recompare fails 1327b206181dSStefan Haberland * the path can not be used 1328b206181dSStefan Haberland */ 1329b206181dSStefan Haberland if (rebuild_device_uid(device, data) || 1330b206181dSStefan Haberland dasd_eckd_compare_path_uid( 1331b206181dSStefan Haberland device, &path_private)) { 1332b206181dSStefan Haberland uid = &path_private.uid; 1333b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1334b206181dSStefan Haberland snprintf(print_uid, sizeof(print_uid), 1335b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1336b206181dSStefan Haberland uid->vendor, uid->serial, 1337b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1338b206181dSStefan Haberland uid->vduit); 1339b206181dSStefan Haberland else 1340b206181dSStefan Haberland snprintf(print_uid, sizeof(print_uid), 1341b206181dSStefan Haberland "%s.%s.%04x.%02x", 1342b206181dSStefan Haberland uid->vendor, uid->serial, 1343b206181dSStefan Haberland uid->ssid, 1344b206181dSStefan Haberland uid->real_unit_addr); 1345b206181dSStefan Haberland dev_err(&device->cdev->dev, 1346b206181dSStefan Haberland "The newly added channel path %02X " 1347b206181dSStefan Haberland "will not be used because it leads " 1348b206181dSStefan Haberland "to a different device %s\n", 1349b206181dSStefan Haberland lpm, print_uid); 1350b206181dSStefan Haberland opm &= ~lpm; 1351b206181dSStefan Haberland npm &= ~lpm; 1352b206181dSStefan Haberland ppm &= ~lpm; 1353b206181dSStefan Haberland continue; 1354a4d26c6aSStefan Weinhuber } 1355a4d26c6aSStefan Weinhuber } 1356b206181dSStefan Haberland 1357a4d26c6aSStefan Weinhuber /* 1358a4d26c6aSStefan Weinhuber * There is a small chance that a path is lost again between 1359a4d26c6aSStefan Weinhuber * above path verification and the following modification of 1360a4d26c6aSStefan Weinhuber * the device opm mask. We could avoid that race here by using 1361a4d26c6aSStefan Weinhuber * yet another path mask, but we rather deal with this unlikely 1362a4d26c6aSStefan Weinhuber * situation in dasd_start_IO. 1363a4d26c6aSStefan Weinhuber */ 1364a4d26c6aSStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1365a4d26c6aSStefan Weinhuber if (!device->path_data.opm && opm) { 1366a4d26c6aSStefan Weinhuber device->path_data.opm = opm; 1367a4d26c6aSStefan Weinhuber dasd_generic_path_operational(device); 1368a4d26c6aSStefan Weinhuber } else 1369a4d26c6aSStefan Weinhuber device->path_data.opm |= opm; 1370a4d26c6aSStefan Weinhuber device->path_data.npm |= npm; 1371a4d26c6aSStefan Weinhuber device->path_data.ppm |= ppm; 1372a4d26c6aSStefan Weinhuber device->path_data.tbvpm |= epm; 1373a4d26c6aSStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1374b206181dSStefan Haberland } 1375a4d26c6aSStefan Weinhuber 1376a4d26c6aSStefan Weinhuber dasd_put_device(device); 1377a4d26c6aSStefan Weinhuber if (data->isglobal) 1378a4d26c6aSStefan Weinhuber mutex_unlock(&dasd_path_verification_mutex); 1379a4d26c6aSStefan Weinhuber else 1380a4d26c6aSStefan Weinhuber kfree(data); 1381a4d26c6aSStefan Weinhuber } 1382a4d26c6aSStefan Weinhuber 1383a4d26c6aSStefan Weinhuber static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm) 1384a4d26c6aSStefan Weinhuber { 1385a4d26c6aSStefan Weinhuber struct path_verification_work_data *data; 1386a4d26c6aSStefan Weinhuber 1387a4d26c6aSStefan Weinhuber data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA); 1388a4d26c6aSStefan Weinhuber if (!data) { 1389a4d26c6aSStefan Weinhuber if (mutex_trylock(&dasd_path_verification_mutex)) { 1390a4d26c6aSStefan Weinhuber data = path_verification_worker; 1391a4d26c6aSStefan Weinhuber data->isglobal = 1; 1392a4d26c6aSStefan Weinhuber } else 1393a4d26c6aSStefan Weinhuber return -ENOMEM; 1394a4d26c6aSStefan Weinhuber } else { 1395a4d26c6aSStefan Weinhuber memset(data, 0, sizeof(*data)); 1396a4d26c6aSStefan Weinhuber data->isglobal = 0; 1397a4d26c6aSStefan Weinhuber } 1398a4d26c6aSStefan Weinhuber INIT_WORK(&data->worker, do_path_verification_work); 1399a4d26c6aSStefan Weinhuber dasd_get_device(device); 1400a4d26c6aSStefan Weinhuber data->device = device; 1401a4d26c6aSStefan Weinhuber data->tbvpm = lpm; 1402a4d26c6aSStefan Weinhuber schedule_work(&data->worker); 1403a4d26c6aSStefan Weinhuber return 0; 1404a4d26c6aSStefan Weinhuber } 1405a4d26c6aSStefan Weinhuber 14068e09f215SStefan Weinhuber static int dasd_eckd_read_features(struct dasd_device *device) 14078e09f215SStefan Weinhuber { 14088e09f215SStefan Weinhuber struct dasd_psf_prssd_data *prssdp; 14098e09f215SStefan Weinhuber struct dasd_rssd_features *features; 14108e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 14118e09f215SStefan Weinhuber struct ccw1 *ccw; 14128e09f215SStefan Weinhuber int rc; 14138e09f215SStefan Weinhuber struct dasd_eckd_private *private; 14148e09f215SStefan Weinhuber 14158e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 141668d1e5f0SStefan Weinhuber memset(&private->features, 0, sizeof(struct dasd_rssd_features)); 141768b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 14188e09f215SStefan Weinhuber (sizeof(struct dasd_psf_prssd_data) + 14198e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)), 14208e09f215SStefan Weinhuber device); 14218e09f215SStefan Weinhuber if (IS_ERR(cqr)) { 1422b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " 1423b8ed5dd5SStefan Haberland "allocate initialization request"); 14248e09f215SStefan Weinhuber return PTR_ERR(cqr); 14258e09f215SStefan Weinhuber } 14268e09f215SStefan Weinhuber cqr->startdev = device; 14278e09f215SStefan Weinhuber cqr->memdev = device; 14288e09f215SStefan Weinhuber cqr->block = NULL; 1429eb6e199bSStefan Weinhuber cqr->retries = 256; 14308e09f215SStefan Weinhuber cqr->expires = 10 * HZ; 14318e09f215SStefan Weinhuber 14328e09f215SStefan Weinhuber /* Prepare for Read Subsystem Data */ 14338e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 14348e09f215SStefan Weinhuber memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 14358e09f215SStefan Weinhuber prssdp->order = PSF_ORDER_PRSSD; 14368e09f215SStefan Weinhuber prssdp->suborder = 0x41; /* Read Feature Codes */ 14378e09f215SStefan Weinhuber /* all other bytes of prssdp must be zero */ 14388e09f215SStefan Weinhuber 14398e09f215SStefan Weinhuber ccw = cqr->cpaddr; 14408e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PSF; 14418e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_psf_prssd_data); 14428e09f215SStefan Weinhuber ccw->flags |= CCW_FLAG_CC; 14438e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) prssdp; 14448e09f215SStefan Weinhuber 14458e09f215SStefan Weinhuber /* Read Subsystem Data - feature codes */ 14468e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 14478e09f215SStefan Weinhuber memset(features, 0, sizeof(struct dasd_rssd_features)); 14488e09f215SStefan Weinhuber 14498e09f215SStefan Weinhuber ccw++; 14508e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RSSD; 14518e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_rssd_features); 14528e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) features; 14538e09f215SStefan Weinhuber 14541aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 14558e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 14568e09f215SStefan Weinhuber rc = dasd_sleep_on(cqr); 14578e09f215SStefan Weinhuber if (rc == 0) { 14588e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 14598e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 14608e09f215SStefan Weinhuber memcpy(&private->features, features, 14618e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)); 146268d1e5f0SStefan Weinhuber } else 146368d1e5f0SStefan Weinhuber dev_warn(&device->cdev->dev, "Reading device feature codes" 146468d1e5f0SStefan Weinhuber " failed with rc=%d\n", rc); 14658e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 14668e09f215SStefan Weinhuber return rc; 14678e09f215SStefan Weinhuber } 14688e09f215SStefan Weinhuber 14698e09f215SStefan Weinhuber 14703d052595SHorst Hummel /* 147140545573SHorst Hummel * Build CP for Perform Subsystem Function - SSC. 147240545573SHorst Hummel */ 1473f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, 1474f3eb5384SStefan Weinhuber int enable_pav) 147540545573SHorst Hummel { 147640545573SHorst Hummel struct dasd_ccw_req *cqr; 147740545573SHorst Hummel struct dasd_psf_ssc_data *psf_ssc_data; 147840545573SHorst Hummel struct ccw1 *ccw; 147940545573SHorst Hummel 148068b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 148140545573SHorst Hummel sizeof(struct dasd_psf_ssc_data), 148240545573SHorst Hummel device); 148340545573SHorst Hummel 148440545573SHorst Hummel if (IS_ERR(cqr)) { 1485fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 148640545573SHorst Hummel "Could not allocate PSF-SSC request"); 148740545573SHorst Hummel return cqr; 148840545573SHorst Hummel } 148940545573SHorst Hummel psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 149040545573SHorst Hummel psf_ssc_data->order = PSF_ORDER_SSC; 1491626350b6SStefan Weinhuber psf_ssc_data->suborder = 0xc0; 1492f3eb5384SStefan Weinhuber if (enable_pav) { 1493626350b6SStefan Weinhuber psf_ssc_data->suborder |= 0x08; 14948e09f215SStefan Weinhuber psf_ssc_data->reserved[0] = 0x88; 1495f3eb5384SStefan Weinhuber } 149640545573SHorst Hummel ccw = cqr->cpaddr; 149740545573SHorst Hummel ccw->cmd_code = DASD_ECKD_CCW_PSF; 149840545573SHorst Hummel ccw->cda = (__u32)(addr_t)psf_ssc_data; 149940545573SHorst Hummel ccw->count = 66; 150040545573SHorst Hummel 15018e09f215SStefan Weinhuber cqr->startdev = device; 15028e09f215SStefan Weinhuber cqr->memdev = device; 15038e09f215SStefan Weinhuber cqr->block = NULL; 1504eb6e199bSStefan Weinhuber cqr->retries = 256; 150540545573SHorst Hummel cqr->expires = 10*HZ; 15061aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 150740545573SHorst Hummel cqr->status = DASD_CQR_FILLED; 150840545573SHorst Hummel return cqr; 150940545573SHorst Hummel } 151040545573SHorst Hummel 151140545573SHorst Hummel /* 151240545573SHorst Hummel * Perform Subsystem Function. 151340545573SHorst Hummel * It is necessary to trigger CIO for channel revalidation since this 151440545573SHorst Hummel * call might change behaviour of DASD devices. 151540545573SHorst Hummel */ 151640545573SHorst Hummel static int 151712d7b107SStefan Haberland dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav, 151812d7b107SStefan Haberland unsigned long flags) 151940545573SHorst Hummel { 152040545573SHorst Hummel struct dasd_ccw_req *cqr; 152140545573SHorst Hummel int rc; 152240545573SHorst Hummel 1523f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_psf_ssc(device, enable_pav); 152440545573SHorst Hummel if (IS_ERR(cqr)) 152540545573SHorst Hummel return PTR_ERR(cqr); 152640545573SHorst Hummel 152712d7b107SStefan Haberland /* 152812d7b107SStefan Haberland * set flags e.g. turn on failfast, to prevent blocking 152912d7b107SStefan Haberland * the calling function should handle failed requests 153012d7b107SStefan Haberland */ 153112d7b107SStefan Haberland cqr->flags |= flags; 153212d7b107SStefan Haberland 153340545573SHorst Hummel rc = dasd_sleep_on(cqr); 153440545573SHorst Hummel if (!rc) 153540545573SHorst Hummel /* trigger CIO to reprobe devices */ 153640545573SHorst Hummel css_schedule_reprobe(); 153712d7b107SStefan Haberland else if (cqr->intrc == -EAGAIN) 153812d7b107SStefan Haberland rc = -EAGAIN; 153912d7b107SStefan Haberland 15408e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 154140545573SHorst Hummel return rc; 154240545573SHorst Hummel } 154340545573SHorst Hummel 154440545573SHorst Hummel /* 154540545573SHorst Hummel * Valide storage server of current device. 154640545573SHorst Hummel */ 154712d7b107SStefan Haberland static int dasd_eckd_validate_server(struct dasd_device *device, 154812d7b107SStefan Haberland unsigned long flags) 154940545573SHorst Hummel { 155040545573SHorst Hummel int rc; 15518e09f215SStefan Weinhuber struct dasd_eckd_private *private; 1552f3eb5384SStefan Weinhuber int enable_pav; 155340545573SHorst Hummel 1554f9f8d02fSStefan Haberland private = (struct dasd_eckd_private *) device->private; 1555f9f8d02fSStefan Haberland if (private->uid.type == UA_BASE_PAV_ALIAS || 1556f9f8d02fSStefan Haberland private->uid.type == UA_HYPER_PAV_ALIAS) 155712d7b107SStefan Haberland return 0; 155840545573SHorst Hummel if (dasd_nopav || MACHINE_IS_VM) 1559f3eb5384SStefan Weinhuber enable_pav = 0; 1560f3eb5384SStefan Weinhuber else 1561f3eb5384SStefan Weinhuber enable_pav = 1; 156212d7b107SStefan Haberland rc = dasd_eckd_psf_ssc(device, enable_pav, flags); 1563eb6e199bSStefan Weinhuber 156440545573SHorst Hummel /* may be requested feature is not available on server, 156540545573SHorst Hummel * therefore just report error and go ahead */ 1566b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " 1567b8ed5dd5SStefan Haberland "returned rc=%d", private->uid.ssid, rc); 156812d7b107SStefan Haberland return rc; 156940545573SHorst Hummel } 157040545573SHorst Hummel 1571f1633031SStefan Haberland /* 1572f1633031SStefan Haberland * worker to do a validate server in case of a lost pathgroup 1573f1633031SStefan Haberland */ 1574f1633031SStefan Haberland static void dasd_eckd_do_validate_server(struct work_struct *work) 1575f1633031SStefan Haberland { 1576f1633031SStefan Haberland struct dasd_device *device = container_of(work, struct dasd_device, 1577f1633031SStefan Haberland kick_validate); 1578ea4da6eaSStefan Haberland unsigned long flags = 0; 1579ea4da6eaSStefan Haberland 1580ea4da6eaSStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &flags); 1581ea4da6eaSStefan Haberland if (dasd_eckd_validate_server(device, flags) 158212d7b107SStefan Haberland == -EAGAIN) { 158312d7b107SStefan Haberland /* schedule worker again if failed */ 158412d7b107SStefan Haberland schedule_work(&device->kick_validate); 158512d7b107SStefan Haberland return; 158612d7b107SStefan Haberland } 158712d7b107SStefan Haberland 1588f1633031SStefan Haberland dasd_put_device(device); 1589f1633031SStefan Haberland } 1590f1633031SStefan Haberland 1591f1633031SStefan Haberland static void dasd_eckd_kick_validate_server(struct dasd_device *device) 1592f1633031SStefan Haberland { 1593f1633031SStefan Haberland dasd_get_device(device); 159425e2cf1cSStefan Haberland /* exit if device not online or in offline processing */ 159525e2cf1cSStefan Haberland if (test_bit(DASD_FLAG_OFFLINE, &device->flags) || 159625e2cf1cSStefan Haberland device->state < DASD_STATE_ONLINE) { 159725e2cf1cSStefan Haberland dasd_put_device(device); 159825e2cf1cSStefan Haberland return; 159925e2cf1cSStefan Haberland } 1600f1633031SStefan Haberland /* queue call to do_validate_server to the kernel event daemon. */ 1601f1633031SStefan Haberland schedule_work(&device->kick_validate); 1602f1633031SStefan Haberland } 1603f1633031SStefan Haberland 1604ef19298bSStefan Weinhuber static u32 get_fcx_max_data(struct dasd_device *device) 1605ef19298bSStefan Weinhuber { 1606ef19298bSStefan Weinhuber #if defined(CONFIG_64BIT) 1607ef19298bSStefan Weinhuber int tpm, mdc; 1608ef19298bSStefan Weinhuber int fcx_in_css, fcx_in_gneq, fcx_in_features; 1609ef19298bSStefan Weinhuber struct dasd_eckd_private *private; 1610ef19298bSStefan Weinhuber 1611ef19298bSStefan Weinhuber if (dasd_nofcx) 1612ef19298bSStefan Weinhuber return 0; 1613ef19298bSStefan Weinhuber /* is transport mode supported? */ 1614ef19298bSStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 1615ef19298bSStefan Weinhuber fcx_in_css = css_general_characteristics.fcx; 1616ef19298bSStefan Weinhuber fcx_in_gneq = private->gneq->reserved2[7] & 0x04; 1617ef19298bSStefan Weinhuber fcx_in_features = private->features.feature[40] & 0x80; 1618ef19298bSStefan Weinhuber tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; 1619ef19298bSStefan Weinhuber 1620ef19298bSStefan Weinhuber if (!tpm) 1621ef19298bSStefan Weinhuber return 0; 1622ef19298bSStefan Weinhuber 1623ef19298bSStefan Weinhuber mdc = ccw_device_get_mdc(device->cdev, 0); 1624ef19298bSStefan Weinhuber if (mdc < 0) { 1625ef19298bSStefan Weinhuber dev_warn(&device->cdev->dev, "Detecting the maximum supported" 1626ef19298bSStefan Weinhuber " data size for zHPF requests failed\n"); 1627ef19298bSStefan Weinhuber return 0; 1628ef19298bSStefan Weinhuber } else 1629ef19298bSStefan Weinhuber return mdc * FCX_MAX_DATA_FACTOR; 1630ef19298bSStefan Weinhuber #else 1631ef19298bSStefan Weinhuber return 0; 1632ef19298bSStefan Weinhuber #endif 1633ef19298bSStefan Weinhuber } 1634ef19298bSStefan Weinhuber 163540545573SHorst Hummel /* 16363d052595SHorst Hummel * Check device characteristics. 16373d052595SHorst Hummel * If the device is accessible using ECKD discipline, the device is enabled. 16383d052595SHorst Hummel */ 16391da177e4SLinus Torvalds static int 16401da177e4SLinus Torvalds dasd_eckd_check_characteristics(struct dasd_device *device) 16411da177e4SLinus Torvalds { 16421da177e4SLinus Torvalds struct dasd_eckd_private *private; 16438e09f215SStefan Weinhuber struct dasd_block *block; 16442dedf0d9SStefan Haberland struct dasd_uid temp_uid; 1645f9f8d02fSStefan Haberland int rc, i; 164633b62a30SStefan Weinhuber int readonly; 16477c8faa86SStefan Haberland unsigned long value; 16481da177e4SLinus Torvalds 1649f1633031SStefan Haberland /* setup work queue for validate server*/ 1650f1633031SStefan Haberland INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server); 1651f1633031SStefan Haberland 1652454e1fa1SPeter Oberparleiter if (!ccw_device_is_pathgroup(device->cdev)) { 1653454e1fa1SPeter Oberparleiter dev_warn(&device->cdev->dev, 1654454e1fa1SPeter Oberparleiter "A channel path group could not be established\n"); 1655454e1fa1SPeter Oberparleiter return -EIO; 1656454e1fa1SPeter Oberparleiter } 1657454e1fa1SPeter Oberparleiter if (!ccw_device_is_multipath(device->cdev)) { 1658454e1fa1SPeter Oberparleiter dev_info(&device->cdev->dev, 1659454e1fa1SPeter Oberparleiter "The DASD is not operating in multipath mode\n"); 1660454e1fa1SPeter Oberparleiter } 16611da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 166292636b15SSebastian Ott if (!private) { 166392636b15SSebastian Ott private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); 166492636b15SSebastian Ott if (!private) { 1665fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1666fc19f381SStefan Haberland "Allocating memory for private DASD data " 1667fc19f381SStefan Haberland "failed\n"); 16681da177e4SLinus Torvalds return -ENOMEM; 16691da177e4SLinus Torvalds } 16701da177e4SLinus Torvalds device->private = (void *) private; 167192636b15SSebastian Ott } else { 167292636b15SSebastian Ott memset(private, 0, sizeof(*private)); 16731da177e4SLinus Torvalds } 16741da177e4SLinus Torvalds /* Invalidate status of initial analysis. */ 16751da177e4SLinus Torvalds private->init_cqr_status = -1; 16761da177e4SLinus Torvalds /* Set default cache operations. */ 16771da177e4SLinus Torvalds private->attrib.operation = DASD_NORMAL_CACHE; 16781da177e4SLinus Torvalds private->attrib.nr_cyl = 0; 16791da177e4SLinus Torvalds 168040545573SHorst Hummel /* Read Configuration Data */ 168140545573SHorst Hummel rc = dasd_eckd_read_conf(device); 168240545573SHorst Hummel if (rc) 16838e09f215SStefan Weinhuber goto out_err1; 168440545573SHorst Hummel 16857c8faa86SStefan Haberland /* set default timeout */ 16867c8faa86SStefan Haberland device->default_expires = DASD_EXPIRES; 16871f1ee9adSHannes Reinecke /* set default retry count */ 16881f1ee9adSHannes Reinecke device->default_retries = DASD_RETRIES; 16891f1ee9adSHannes Reinecke 16907c8faa86SStefan Haberland if (private->gneq) { 16917c8faa86SStefan Haberland value = 1; 16927c8faa86SStefan Haberland for (i = 0; i < private->gneq->timeout.value; i++) 16937c8faa86SStefan Haberland value = 10 * value; 16947c8faa86SStefan Haberland value = value * private->gneq->timeout.number; 16957c8faa86SStefan Haberland /* do not accept useless values */ 16967c8faa86SStefan Haberland if (value != 0 && value <= DASD_EXPIRES_MAX) 16977c8faa86SStefan Haberland device->default_expires = value; 16987c8faa86SStefan Haberland } 16997c8faa86SStefan Haberland 17002dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 17012dedf0d9SStefan Haberland if (temp_uid.type == UA_BASE_DEVICE) { 17028e09f215SStefan Weinhuber block = dasd_alloc_block(); 17038e09f215SStefan Weinhuber if (IS_ERR(block)) { 1704b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1705b8ed5dd5SStefan Haberland "could not allocate dasd " 1706b8ed5dd5SStefan Haberland "block structure"); 17078e09f215SStefan Weinhuber rc = PTR_ERR(block); 17088e09f215SStefan Weinhuber goto out_err1; 17098e09f215SStefan Weinhuber } 17108e09f215SStefan Weinhuber device->block = block; 17118e09f215SStefan Weinhuber block->base = device; 17128e09f215SStefan Weinhuber } 17138e09f215SStefan Weinhuber 1714f9f8d02fSStefan Haberland /* register lcu with alias handling, enable PAV */ 1715f9f8d02fSStefan Haberland rc = dasd_alias_make_device_known_to_lcu(device); 1716f9f8d02fSStefan Haberland if (rc) 17178e09f215SStefan Weinhuber goto out_err2; 1718f9f8d02fSStefan Haberland 171912d7b107SStefan Haberland dasd_eckd_validate_server(device, 0); 1720f4ac1d02SStefan Weinhuber 1721f4ac1d02SStefan Weinhuber /* device may report different configuration data after LCU setup */ 1722f4ac1d02SStefan Weinhuber rc = dasd_eckd_read_conf(device); 172340545573SHorst Hummel if (rc) 17248e09f215SStefan Weinhuber goto out_err3; 17258e09f215SStefan Weinhuber 17268e09f215SStefan Weinhuber /* Read Feature Codes */ 172768d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 172840545573SHorst Hummel 17291da177e4SLinus Torvalds /* Read Device Characteristics */ 173068b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 173168b781feSStefan Haberland &private->rdc_data, 64); 17328e09f215SStefan Weinhuber if (rc) { 1733b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1734b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 17358e09f215SStefan Weinhuber goto out_err3; 17368e09f215SStefan Weinhuber } 173734cd551aSStefan Haberland 173834cd551aSStefan Haberland if ((device->features & DASD_FEATURE_USERAW) && 173934cd551aSStefan Haberland !(private->rdc_data.facilities.RT_in_LR)) { 174034cd551aSStefan Haberland dev_err(&device->cdev->dev, "The storage server does not " 174134cd551aSStefan Haberland "support raw-track access\n"); 174234cd551aSStefan Haberland rc = -EINVAL; 174334cd551aSStefan Haberland goto out_err3; 174434cd551aSStefan Haberland } 174534cd551aSStefan Haberland 1746817f2c84SNikanth Karthikesan /* find the valid cylinder size */ 1747b44b0ab3SStefan Weinhuber if (private->rdc_data.no_cyl == LV_COMPAT_CYL && 1748b44b0ab3SStefan Weinhuber private->rdc_data.long_no_cyl) 1749b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.long_no_cyl; 1750b44b0ab3SStefan Weinhuber else 1751b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.no_cyl; 1752b44b0ab3SStefan Weinhuber 1753ef19298bSStefan Weinhuber private->fcx_max_data = get_fcx_max_data(device); 1754ef19298bSStefan Weinhuber 175533b62a30SStefan Weinhuber readonly = dasd_device_is_ro(device); 175633b62a30SStefan Weinhuber if (readonly) 175733b62a30SStefan Weinhuber set_bit(DASD_FLAG_DEVICE_RO, &device->flags); 175833b62a30SStefan Weinhuber 1759fc19f381SStefan Haberland dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " 176033b62a30SStefan Weinhuber "with %d cylinders, %d heads, %d sectors%s\n", 17611da177e4SLinus Torvalds private->rdc_data.dev_type, 17621da177e4SLinus Torvalds private->rdc_data.dev_model, 17631da177e4SLinus Torvalds private->rdc_data.cu_type, 17641da177e4SLinus Torvalds private->rdc_data.cu_model.model, 1765b44b0ab3SStefan Weinhuber private->real_cyl, 17661da177e4SLinus Torvalds private->rdc_data.trk_per_cyl, 176733b62a30SStefan Weinhuber private->rdc_data.sec_per_trk, 176833b62a30SStefan Weinhuber readonly ? ", read-only device" : ""); 17698e09f215SStefan Weinhuber return 0; 17708e09f215SStefan Weinhuber 17718e09f215SStefan Weinhuber out_err3: 17728e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 17738e09f215SStefan Weinhuber out_err2: 17748e09f215SStefan Weinhuber dasd_free_block(device->block); 17758e09f215SStefan Weinhuber device->block = NULL; 17768e09f215SStefan Weinhuber out_err1: 17774abb08c2SStefan Weinhuber kfree(private->conf_data); 17788e09f215SStefan Weinhuber kfree(device->private); 17798e09f215SStefan Weinhuber device->private = NULL; 17803d052595SHorst Hummel return rc; 17811da177e4SLinus Torvalds } 17821da177e4SLinus Torvalds 17838e09f215SStefan Weinhuber static void dasd_eckd_uncheck_device(struct dasd_device *device) 17848e09f215SStefan Weinhuber { 17854abb08c2SStefan Weinhuber struct dasd_eckd_private *private; 17864abb08c2SStefan Weinhuber 17874abb08c2SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 17888e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 17894abb08c2SStefan Weinhuber private->ned = NULL; 17904abb08c2SStefan Weinhuber private->sneq = NULL; 17914abb08c2SStefan Weinhuber private->vdsneq = NULL; 17924abb08c2SStefan Weinhuber private->gneq = NULL; 17934abb08c2SStefan Weinhuber private->conf_len = 0; 17944abb08c2SStefan Weinhuber kfree(private->conf_data); 17954abb08c2SStefan Weinhuber private->conf_data = NULL; 17968e09f215SStefan Weinhuber } 17978e09f215SStefan Weinhuber 17981da177e4SLinus Torvalds static struct dasd_ccw_req * 17991da177e4SLinus Torvalds dasd_eckd_analysis_ccw(struct dasd_device *device) 18001da177e4SLinus Torvalds { 18011da177e4SLinus Torvalds struct dasd_eckd_private *private; 18021da177e4SLinus Torvalds struct eckd_count *count_data; 18031da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 18041da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 18051da177e4SLinus Torvalds struct ccw1 *ccw; 18061da177e4SLinus Torvalds int cplength, datasize; 18071da177e4SLinus Torvalds int i; 18081da177e4SLinus Torvalds 18091da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 18101da177e4SLinus Torvalds 18111da177e4SLinus Torvalds cplength = 8; 18121da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 181368b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 18141da177e4SLinus Torvalds if (IS_ERR(cqr)) 18151da177e4SLinus Torvalds return cqr; 18161da177e4SLinus Torvalds ccw = cqr->cpaddr; 18171da177e4SLinus Torvalds /* Define extent for the first 3 tracks. */ 18181da177e4SLinus Torvalds define_extent(ccw++, cqr->data, 0, 2, 18191da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device); 18201da177e4SLinus Torvalds LO_data = cqr->data + sizeof(struct DE_eckd_data); 18211da177e4SLinus Torvalds /* Locate record for the first 4 records on track 0. */ 18221da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18231da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 0, 0, 4, 18241da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 18251da177e4SLinus Torvalds 18261da177e4SLinus Torvalds count_data = private->count_area; 18271da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 18281da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18291da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 18301da177e4SLinus Torvalds ccw->flags = 0; 18311da177e4SLinus Torvalds ccw->count = 8; 18321da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 18331da177e4SLinus Torvalds ccw++; 18341da177e4SLinus Torvalds count_data++; 18351da177e4SLinus Torvalds } 18361da177e4SLinus Torvalds 18371da177e4SLinus Torvalds /* Locate record for the first record on track 2. */ 18381da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18391da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 2, 0, 1, 18401da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 18411da177e4SLinus Torvalds /* Read count ccw. */ 18421da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18431da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 18441da177e4SLinus Torvalds ccw->flags = 0; 18451da177e4SLinus Torvalds ccw->count = 8; 18461da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 18471da177e4SLinus Torvalds 18488e09f215SStefan Weinhuber cqr->block = NULL; 18498e09f215SStefan Weinhuber cqr->startdev = device; 18508e09f215SStefan Weinhuber cqr->memdev = device; 1851eb6e199bSStefan Weinhuber cqr->retries = 255; 18521aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 18531da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 18541da177e4SLinus Torvalds return cqr; 18551da177e4SLinus Torvalds } 18561da177e4SLinus Torvalds 1857eb6e199bSStefan Weinhuber /* differentiate between 'no record found' and any other error */ 1858eb6e199bSStefan Weinhuber static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) 1859eb6e199bSStefan Weinhuber { 1860eb6e199bSStefan Weinhuber char *sense; 1861eb6e199bSStefan Weinhuber if (init_cqr->status == DASD_CQR_DONE) 1862eb6e199bSStefan Weinhuber return INIT_CQR_OK; 1863eb6e199bSStefan Weinhuber else if (init_cqr->status == DASD_CQR_NEED_ERP || 1864eb6e199bSStefan Weinhuber init_cqr->status == DASD_CQR_FAILED) { 1865eb6e199bSStefan Weinhuber sense = dasd_get_sense(&init_cqr->irb); 1866eb6e199bSStefan Weinhuber if (sense && (sense[1] & SNS1_NO_REC_FOUND)) 1867eb6e199bSStefan Weinhuber return INIT_CQR_UNFORMATTED; 1868eb6e199bSStefan Weinhuber else 1869eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 1870eb6e199bSStefan Weinhuber } else 1871eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 1872eb6e199bSStefan Weinhuber } 1873eb6e199bSStefan Weinhuber 18741da177e4SLinus Torvalds /* 18751da177e4SLinus Torvalds * This is the callback function for the init_analysis cqr. It saves 18761da177e4SLinus Torvalds * the status of the initial analysis ccw before it frees it and kicks 18771da177e4SLinus Torvalds * the device to continue the startup sequence. This will call 18781da177e4SLinus Torvalds * dasd_eckd_do_analysis again (if the devices has not been marked 18791da177e4SLinus Torvalds * for deletion in the meantime). 18801da177e4SLinus Torvalds */ 1881eb6e199bSStefan Weinhuber static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, 1882eb6e199bSStefan Weinhuber void *data) 18831da177e4SLinus Torvalds { 18841da177e4SLinus Torvalds struct dasd_eckd_private *private; 18851da177e4SLinus Torvalds struct dasd_device *device; 18861da177e4SLinus Torvalds 18878e09f215SStefan Weinhuber device = init_cqr->startdev; 18881da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 1889eb6e199bSStefan Weinhuber private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); 18901da177e4SLinus Torvalds dasd_sfree_request(init_cqr, device); 18911da177e4SLinus Torvalds dasd_kick_device(device); 18921da177e4SLinus Torvalds } 18931da177e4SLinus Torvalds 1894eb6e199bSStefan Weinhuber static int dasd_eckd_start_analysis(struct dasd_block *block) 18951da177e4SLinus Torvalds { 18961da177e4SLinus Torvalds struct dasd_ccw_req *init_cqr; 18971da177e4SLinus Torvalds 18988e09f215SStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(block->base); 18991da177e4SLinus Torvalds if (IS_ERR(init_cqr)) 19001da177e4SLinus Torvalds return PTR_ERR(init_cqr); 19011da177e4SLinus Torvalds init_cqr->callback = dasd_eckd_analysis_callback; 19021da177e4SLinus Torvalds init_cqr->callback_data = NULL; 19031da177e4SLinus Torvalds init_cqr->expires = 5*HZ; 1904eb6e199bSStefan Weinhuber /* first try without ERP, so we can later handle unformatted 1905eb6e199bSStefan Weinhuber * devices as special case 1906eb6e199bSStefan Weinhuber */ 1907eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); 1908eb6e199bSStefan Weinhuber init_cqr->retries = 0; 19091da177e4SLinus Torvalds dasd_add_request_head(init_cqr); 19101da177e4SLinus Torvalds return -EAGAIN; 19111da177e4SLinus Torvalds } 19121da177e4SLinus Torvalds 1913eb6e199bSStefan Weinhuber static int dasd_eckd_end_analysis(struct dasd_block *block) 19141da177e4SLinus Torvalds { 19158e09f215SStefan Weinhuber struct dasd_device *device; 19161da177e4SLinus Torvalds struct dasd_eckd_private *private; 19171da177e4SLinus Torvalds struct eckd_count *count_area; 19181da177e4SLinus Torvalds unsigned int sb, blk_per_trk; 19191da177e4SLinus Torvalds int status, i; 1920eb6e199bSStefan Weinhuber struct dasd_ccw_req *init_cqr; 19211da177e4SLinus Torvalds 19228e09f215SStefan Weinhuber device = block->base; 19231da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 19241da177e4SLinus Torvalds status = private->init_cqr_status; 19251da177e4SLinus Torvalds private->init_cqr_status = -1; 1926eb6e199bSStefan Weinhuber if (status == INIT_CQR_ERROR) { 1927eb6e199bSStefan Weinhuber /* try again, this time with full ERP */ 1928eb6e199bSStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(device); 1929eb6e199bSStefan Weinhuber dasd_sleep_on(init_cqr); 1930eb6e199bSStefan Weinhuber status = dasd_eckd_analysis_evaluation(init_cqr); 1931eb6e199bSStefan Weinhuber dasd_sfree_request(init_cqr, device); 1932eb6e199bSStefan Weinhuber } 1933eb6e199bSStefan Weinhuber 1934e4dbb0f2SStefan Haberland if (device->features & DASD_FEATURE_USERAW) { 1935e4dbb0f2SStefan Haberland block->bp_block = DASD_RAW_BLOCKSIZE; 1936e4dbb0f2SStefan Haberland blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; 1937e4dbb0f2SStefan Haberland block->s2b_shift = 3; 1938e4dbb0f2SStefan Haberland goto raw; 1939e4dbb0f2SStefan Haberland } 1940e4dbb0f2SStefan Haberland 1941eb6e199bSStefan Weinhuber if (status == INIT_CQR_UNFORMATTED) { 1942eb6e199bSStefan Weinhuber dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); 19431da177e4SLinus Torvalds return -EMEDIUMTYPE; 1944eb6e199bSStefan Weinhuber } else if (status == INIT_CQR_ERROR) { 1945eb6e199bSStefan Weinhuber dev_err(&device->cdev->dev, 1946eb6e199bSStefan Weinhuber "Detecting the DASD disk layout failed because " 1947eb6e199bSStefan Weinhuber "of an I/O error\n"); 1948eb6e199bSStefan Weinhuber return -EIO; 19491da177e4SLinus Torvalds } 19501da177e4SLinus Torvalds 19511da177e4SLinus Torvalds private->uses_cdl = 1; 19521da177e4SLinus Torvalds /* Check Track 0 for Compatible Disk Layout */ 19531da177e4SLinus Torvalds count_area = NULL; 19541da177e4SLinus Torvalds for (i = 0; i < 3; i++) { 19551da177e4SLinus Torvalds if (private->count_area[i].kl != 4 || 19563bc9fef9SStefan Haberland private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 || 19573bc9fef9SStefan Haberland private->count_area[i].cyl != 0 || 19583bc9fef9SStefan Haberland private->count_area[i].head != count_area_head[i] || 19593bc9fef9SStefan Haberland private->count_area[i].record != count_area_rec[i]) { 19601da177e4SLinus Torvalds private->uses_cdl = 0; 19611da177e4SLinus Torvalds break; 19621da177e4SLinus Torvalds } 19631da177e4SLinus Torvalds } 19641da177e4SLinus Torvalds if (i == 3) 19651da177e4SLinus Torvalds count_area = &private->count_area[4]; 19661da177e4SLinus Torvalds 19671da177e4SLinus Torvalds if (private->uses_cdl == 0) { 19681da177e4SLinus Torvalds for (i = 0; i < 5; i++) { 19691da177e4SLinus Torvalds if ((private->count_area[i].kl != 0) || 19701da177e4SLinus Torvalds (private->count_area[i].dl != 19713bc9fef9SStefan Haberland private->count_area[0].dl) || 19723bc9fef9SStefan Haberland private->count_area[i].cyl != 0 || 19733bc9fef9SStefan Haberland private->count_area[i].head != count_area_head[i] || 19743bc9fef9SStefan Haberland private->count_area[i].record != count_area_rec[i]) 19751da177e4SLinus Torvalds break; 19761da177e4SLinus Torvalds } 19771da177e4SLinus Torvalds if (i == 5) 19781da177e4SLinus Torvalds count_area = &private->count_area[0]; 19791da177e4SLinus Torvalds } else { 19801da177e4SLinus Torvalds if (private->count_area[3].record == 1) 1981fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1982fc19f381SStefan Haberland "Track 0 has no records following the VTOC\n"); 19831da177e4SLinus Torvalds } 1984e4dbb0f2SStefan Haberland 19851da177e4SLinus Torvalds if (count_area != NULL && count_area->kl == 0) { 19861da177e4SLinus Torvalds /* we found notthing violating our disk layout */ 19871da177e4SLinus Torvalds if (dasd_check_blocksize(count_area->dl) == 0) 19888e09f215SStefan Weinhuber block->bp_block = count_area->dl; 19891da177e4SLinus Torvalds } 19908e09f215SStefan Weinhuber if (block->bp_block == 0) { 1991fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1992fc19f381SStefan Haberland "The disk layout of the DASD is not supported\n"); 19931da177e4SLinus Torvalds return -EMEDIUMTYPE; 19941da177e4SLinus Torvalds } 19958e09f215SStefan Weinhuber block->s2b_shift = 0; /* bits to shift 512 to get a block */ 19968e09f215SStefan Weinhuber for (sb = 512; sb < block->bp_block; sb = sb << 1) 19978e09f215SStefan Weinhuber block->s2b_shift++; 19981da177e4SLinus Torvalds 19998e09f215SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 2000e4dbb0f2SStefan Haberland 2001e4dbb0f2SStefan Haberland raw: 2002b44b0ab3SStefan Weinhuber block->blocks = (private->real_cyl * 20031da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 20041da177e4SLinus Torvalds blk_per_trk); 20051da177e4SLinus Torvalds 2006fc19f381SStefan Haberland dev_info(&device->cdev->dev, 2007fc19f381SStefan Haberland "DASD with %d KB/block, %d KB total size, %d KB/track, " 2008fc19f381SStefan Haberland "%s\n", (block->bp_block >> 10), 2009b44b0ab3SStefan Weinhuber ((private->real_cyl * 20101da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 20118e09f215SStefan Weinhuber blk_per_trk * (block->bp_block >> 9)) >> 1), 20128e09f215SStefan Weinhuber ((blk_per_trk * block->bp_block) >> 10), 20131da177e4SLinus Torvalds private->uses_cdl ? 20141da177e4SLinus Torvalds "compatible disk layout" : "linux disk layout"); 20151da177e4SLinus Torvalds 20161da177e4SLinus Torvalds return 0; 20171da177e4SLinus Torvalds } 20181da177e4SLinus Torvalds 20198e09f215SStefan Weinhuber static int dasd_eckd_do_analysis(struct dasd_block *block) 20201da177e4SLinus Torvalds { 20211da177e4SLinus Torvalds struct dasd_eckd_private *private; 20221da177e4SLinus Torvalds 20238e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 20241da177e4SLinus Torvalds if (private->init_cqr_status < 0) 20258e09f215SStefan Weinhuber return dasd_eckd_start_analysis(block); 20261da177e4SLinus Torvalds else 20278e09f215SStefan Weinhuber return dasd_eckd_end_analysis(block); 20281da177e4SLinus Torvalds } 20291da177e4SLinus Torvalds 2030d42e1712SStefan Haberland static int dasd_eckd_basic_to_ready(struct dasd_device *device) 20318e09f215SStefan Weinhuber { 20328e09f215SStefan Weinhuber return dasd_alias_add_device(device); 20338e09f215SStefan Weinhuber }; 20348e09f215SStefan Weinhuber 20358e09f215SStefan Weinhuber static int dasd_eckd_online_to_ready(struct dasd_device *device) 20368e09f215SStefan Weinhuber { 2037501183f2SStefan Haberland cancel_work_sync(&device->reload_device); 203825e2cf1cSStefan Haberland cancel_work_sync(&device->kick_validate); 2039d42e1712SStefan Haberland return 0; 2040d42e1712SStefan Haberland }; 2041d42e1712SStefan Haberland 2042d42e1712SStefan Haberland static int dasd_eckd_ready_to_basic(struct dasd_device *device) 2043d42e1712SStefan Haberland { 20448e09f215SStefan Weinhuber return dasd_alias_remove_device(device); 20458e09f215SStefan Weinhuber }; 20468e09f215SStefan Weinhuber 20471da177e4SLinus Torvalds static int 20488e09f215SStefan Weinhuber dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 20491da177e4SLinus Torvalds { 20501da177e4SLinus Torvalds struct dasd_eckd_private *private; 20511da177e4SLinus Torvalds 20528e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 20538e09f215SStefan Weinhuber if (dasd_check_blocksize(block->bp_block) == 0) { 20541da177e4SLinus Torvalds geo->sectors = recs_per_track(&private->rdc_data, 20558e09f215SStefan Weinhuber 0, block->bp_block); 20561da177e4SLinus Torvalds } 20571da177e4SLinus Torvalds geo->cylinders = private->rdc_data.no_cyl; 20581da177e4SLinus Torvalds geo->heads = private->rdc_data.trk_per_cyl; 20591da177e4SLinus Torvalds return 0; 20601da177e4SLinus Torvalds } 20611da177e4SLinus Torvalds 20621da177e4SLinus Torvalds static struct dasd_ccw_req * 2063d42e1712SStefan Haberland dasd_eckd_build_format(struct dasd_device *base, 20641da177e4SLinus Torvalds struct format_data_t *fdata) 20651da177e4SLinus Torvalds { 2066d42e1712SStefan Haberland struct dasd_eckd_private *base_priv; 2067d42e1712SStefan Haberland struct dasd_eckd_private *start_priv; 2068d42e1712SStefan Haberland struct dasd_device *startdev; 20691da177e4SLinus Torvalds struct dasd_ccw_req *fcp; 20701da177e4SLinus Torvalds struct eckd_count *ect; 2071d42e1712SStefan Haberland struct ch_t address; 20721da177e4SLinus Torvalds struct ccw1 *ccw; 20731da177e4SLinus Torvalds void *data; 2074b44b0ab3SStefan Weinhuber int rpt; 20751da177e4SLinus Torvalds int cplength, datasize; 2076d42e1712SStefan Haberland int i, j; 2077f9a28f7bSJean-Baptiste Joret int intensity = 0; 2078f9a28f7bSJean-Baptiste Joret int r0_perm; 2079d42e1712SStefan Haberland int nr_tracks; 20801da177e4SLinus Torvalds 2081d42e1712SStefan Haberland startdev = dasd_alias_get_start_dev(base); 2082d42e1712SStefan Haberland if (!startdev) 2083d42e1712SStefan Haberland startdev = base; 20841da177e4SLinus Torvalds 2085d42e1712SStefan Haberland start_priv = (struct dasd_eckd_private *) startdev->private; 2086d42e1712SStefan Haberland base_priv = (struct dasd_eckd_private *) base->private; 2087d42e1712SStefan Haberland 2088d42e1712SStefan Haberland rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize); 2089d42e1712SStefan Haberland 2090d42e1712SStefan Haberland nr_tracks = fdata->stop_unit - fdata->start_unit + 1; 20911da177e4SLinus Torvalds 20921da177e4SLinus Torvalds /* 20931da177e4SLinus Torvalds * fdata->intensity is a bit string that tells us what to do: 20941da177e4SLinus Torvalds * Bit 0: write record zero 20951da177e4SLinus Torvalds * Bit 1: write home address, currently not supported 20961da177e4SLinus Torvalds * Bit 2: invalidate tracks 20971da177e4SLinus Torvalds * Bit 3: use OS/390 compatible disk layout (cdl) 2098f9a28f7bSJean-Baptiste Joret * Bit 4: do not allow storage subsystem to modify record zero 20991da177e4SLinus Torvalds * Only some bit combinations do make sense. 21001da177e4SLinus Torvalds */ 2101f9a28f7bSJean-Baptiste Joret if (fdata->intensity & 0x10) { 2102f9a28f7bSJean-Baptiste Joret r0_perm = 0; 2103f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity & ~0x10; 2104f9a28f7bSJean-Baptiste Joret } else { 2105f9a28f7bSJean-Baptiste Joret r0_perm = 1; 2106f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity; 2107f9a28f7bSJean-Baptiste Joret } 2108d42e1712SStefan Haberland 2109f9a28f7bSJean-Baptiste Joret switch (intensity) { 21101da177e4SLinus Torvalds case 0x00: /* Normal format */ 21111da177e4SLinus Torvalds case 0x08: /* Normal format, use cdl. */ 2112d42e1712SStefan Haberland cplength = 2 + (rpt*nr_tracks); 2113d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 21141da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 2115d42e1712SStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 21161da177e4SLinus Torvalds break; 21171da177e4SLinus Torvalds case 0x01: /* Write record zero and format track. */ 21181da177e4SLinus Torvalds case 0x09: /* Write record zero and format track, use cdl. */ 2119d42e1712SStefan Haberland cplength = 2 + rpt * nr_tracks; 2120d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 21211da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 21221da177e4SLinus Torvalds sizeof(struct eckd_count) + 2123d42e1712SStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 21241da177e4SLinus Torvalds break; 21251da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 21261da177e4SLinus Torvalds case 0x0c: /* Invalidate track, use cdl. */ 21271da177e4SLinus Torvalds cplength = 3; 2128d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 21291da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 21301da177e4SLinus Torvalds sizeof(struct eckd_count); 21311da177e4SLinus Torvalds break; 21321da177e4SLinus Torvalds default: 2133d42e1712SStefan Haberland dev_warn(&startdev->cdev->dev, 2134d42e1712SStefan Haberland "An I/O control call used incorrect flags 0x%x\n", 2135d42e1712SStefan Haberland fdata->intensity); 21361da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 21371da177e4SLinus Torvalds } 21381da177e4SLinus Torvalds /* Allocate the format ccw request. */ 2139d42e1712SStefan Haberland fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 2140d42e1712SStefan Haberland datasize, startdev); 21411da177e4SLinus Torvalds if (IS_ERR(fcp)) 21421da177e4SLinus Torvalds return fcp; 21431da177e4SLinus Torvalds 2144d42e1712SStefan Haberland start_priv->count++; 21451da177e4SLinus Torvalds data = fcp->data; 21461da177e4SLinus Torvalds ccw = fcp->cpaddr; 21471da177e4SLinus Torvalds 2148f9a28f7bSJean-Baptiste Joret switch (intensity & ~0x08) { 21491da177e4SLinus Torvalds case 0x00: /* Normal format. */ 2150d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2151d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 2152d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2153f9a28f7bSJean-Baptiste Joret /* grant subsystem permission to format R0 */ 2154f9a28f7bSJean-Baptiste Joret if (r0_perm) 2155d42e1712SStefan Haberland ((struct PFX_eckd_data *)data) 2156d42e1712SStefan Haberland ->define_extent.ga_extended |= 0x04; 2157d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 21581da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 21591da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 2160d42e1712SStefan Haberland fdata->start_unit, 0, rpt*nr_tracks, 2161d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, 21621da177e4SLinus Torvalds fdata->blksize); 21631da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 21641da177e4SLinus Torvalds break; 21651da177e4SLinus Torvalds case 0x01: /* Write record zero + format track. */ 2166d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2167d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 21681da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, 2169d42e1712SStefan Haberland base, startdev); 2170d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 21711da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 21721da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 2173d42e1712SStefan Haberland fdata->start_unit, 0, rpt * nr_tracks + 1, 2174d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_RECORD_ZERO, base, 2175d42e1712SStefan Haberland base->block->bp_block); 21761da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 21771da177e4SLinus Torvalds break; 21781da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 2179d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2180d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 2181d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2182d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 21831da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 21841da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 21851da177e4SLinus Torvalds fdata->start_unit, 0, 1, 2186d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, 8); 21871da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 21881da177e4SLinus Torvalds break; 21891da177e4SLinus Torvalds } 2190d42e1712SStefan Haberland 2191d42e1712SStefan Haberland for (j = 0; j < nr_tracks; j++) { 2192d42e1712SStefan Haberland /* calculate cylinder and head for the current track */ 2193d42e1712SStefan Haberland set_ch_t(&address, 2194d42e1712SStefan Haberland (fdata->start_unit + j) / 2195d42e1712SStefan Haberland base_priv->rdc_data.trk_per_cyl, 2196d42e1712SStefan Haberland (fdata->start_unit + j) % 2197d42e1712SStefan Haberland base_priv->rdc_data.trk_per_cyl); 2198f9a28f7bSJean-Baptiste Joret if (intensity & 0x01) { /* write record zero */ 21991da177e4SLinus Torvalds ect = (struct eckd_count *) data; 22001da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2201b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2202b44b0ab3SStefan Weinhuber ect->head = address.head; 22031da177e4SLinus Torvalds ect->record = 0; 22041da177e4SLinus Torvalds ect->kl = 0; 22051da177e4SLinus Torvalds ect->dl = 8; 22061da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 22071da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 22081da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 22091da177e4SLinus Torvalds ccw->count = 8; 22101da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 22111da177e4SLinus Torvalds ccw++; 22121da177e4SLinus Torvalds } 2213f9a28f7bSJean-Baptiste Joret if ((intensity & ~0x08) & 0x04) { /* erase track */ 22141da177e4SLinus Torvalds ect = (struct eckd_count *) data; 22151da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2216b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2217b44b0ab3SStefan Weinhuber ect->head = address.head; 22181da177e4SLinus Torvalds ect->record = 1; 22191da177e4SLinus Torvalds ect->kl = 0; 22201da177e4SLinus Torvalds ect->dl = 0; 22211da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 22221da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 22231da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 22241da177e4SLinus Torvalds ccw->count = 8; 22251da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 22261da177e4SLinus Torvalds } else { /* write remaining records */ 22271da177e4SLinus Torvalds for (i = 0; i < rpt; i++) { 22281da177e4SLinus Torvalds ect = (struct eckd_count *) data; 22291da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2230b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2231b44b0ab3SStefan Weinhuber ect->head = address.head; 22321da177e4SLinus Torvalds ect->record = i + 1; 22331da177e4SLinus Torvalds ect->kl = 0; 22341da177e4SLinus Torvalds ect->dl = fdata->blksize; 2235d42e1712SStefan Haberland /* 2236d42e1712SStefan Haberland * Check for special tracks 0-1 2237d42e1712SStefan Haberland * when formatting CDL 2238d42e1712SStefan Haberland */ 2239f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 22401da177e4SLinus Torvalds fdata->start_unit == 0) { 22411da177e4SLinus Torvalds if (i < 3) { 22421da177e4SLinus Torvalds ect->kl = 4; 22431da177e4SLinus Torvalds ect->dl = sizes_trk0[i] - 4; 22441da177e4SLinus Torvalds } 22451da177e4SLinus Torvalds } 2246f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 22471da177e4SLinus Torvalds fdata->start_unit == 1) { 22481da177e4SLinus Torvalds ect->kl = 44; 22491da177e4SLinus Torvalds ect->dl = LABEL_SIZE - 44; 22501da177e4SLinus Torvalds } 22511da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 2252d42e1712SStefan Haberland if (i != 0 || j == 0) 2253d42e1712SStefan Haberland ccw->cmd_code = 2254d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD; 2255d42e1712SStefan Haberland else 2256d42e1712SStefan Haberland ccw->cmd_code = 2257d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD_MT; 22581da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 22591da177e4SLinus Torvalds ccw->count = 8; 22601da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 22611da177e4SLinus Torvalds ccw++; 22621da177e4SLinus Torvalds } 22631da177e4SLinus Torvalds } 2264d42e1712SStefan Haberland } 2265d42e1712SStefan Haberland 2266d42e1712SStefan Haberland fcp->startdev = startdev; 2267d42e1712SStefan Haberland fcp->memdev = startdev; 2268eb6e199bSStefan Weinhuber fcp->retries = 256; 2269d42e1712SStefan Haberland fcp->expires = startdev->default_expires * HZ; 22701aae0560SHeiko Carstens fcp->buildclk = get_tod_clock(); 22711da177e4SLinus Torvalds fcp->status = DASD_CQR_FILLED; 2272d42e1712SStefan Haberland 22731da177e4SLinus Torvalds return fcp; 22741da177e4SLinus Torvalds } 22751da177e4SLinus Torvalds 2276d42e1712SStefan Haberland static int 2277d42e1712SStefan Haberland dasd_eckd_format_device(struct dasd_device *base, 2278d42e1712SStefan Haberland struct format_data_t *fdata) 2279d42e1712SStefan Haberland { 2280d42e1712SStefan Haberland struct dasd_ccw_req *cqr, *n; 2281d42e1712SStefan Haberland struct dasd_block *block; 2282d42e1712SStefan Haberland struct dasd_eckd_private *private; 2283d42e1712SStefan Haberland struct list_head format_queue; 2284d42e1712SStefan Haberland struct dasd_device *device; 2285d42e1712SStefan Haberland int old_stop, format_step; 2286d42e1712SStefan Haberland int step, rc = 0; 2287d42e1712SStefan Haberland 2288d42e1712SStefan Haberland block = base->block; 2289d42e1712SStefan Haberland private = (struct dasd_eckd_private *) base->private; 2290d42e1712SStefan Haberland 2291d42e1712SStefan Haberland /* Sanity checks. */ 2292d42e1712SStefan Haberland if (fdata->start_unit >= 2293d42e1712SStefan Haberland (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2294d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2295d42e1712SStefan Haberland "Start track number %u used in formatting is too big\n", 2296d42e1712SStefan Haberland fdata->start_unit); 2297d42e1712SStefan Haberland return -EINVAL; 2298d42e1712SStefan Haberland } 2299d42e1712SStefan Haberland if (fdata->stop_unit >= 2300d42e1712SStefan Haberland (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2301d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2302d42e1712SStefan Haberland "Stop track number %u used in formatting is too big\n", 2303d42e1712SStefan Haberland fdata->stop_unit); 2304d42e1712SStefan Haberland return -EINVAL; 2305d42e1712SStefan Haberland } 2306d42e1712SStefan Haberland if (fdata->start_unit > fdata->stop_unit) { 2307d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2308d42e1712SStefan Haberland "Start track %u used in formatting exceeds end track\n", 2309d42e1712SStefan Haberland fdata->start_unit); 2310d42e1712SStefan Haberland return -EINVAL; 2311d42e1712SStefan Haberland } 2312d42e1712SStefan Haberland if (dasd_check_blocksize(fdata->blksize) != 0) { 2313d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2314d42e1712SStefan Haberland "The DASD cannot be formatted with block size %u\n", 2315d42e1712SStefan Haberland fdata->blksize); 2316d42e1712SStefan Haberland return -EINVAL; 2317d42e1712SStefan Haberland } 2318d42e1712SStefan Haberland 2319d42e1712SStefan Haberland INIT_LIST_HEAD(&format_queue); 2320d42e1712SStefan Haberland old_stop = fdata->stop_unit; 2321d42e1712SStefan Haberland 2322d42e1712SStefan Haberland while (fdata->start_unit <= 1) { 2323d42e1712SStefan Haberland fdata->stop_unit = fdata->start_unit; 2324d42e1712SStefan Haberland cqr = dasd_eckd_build_format(base, fdata); 2325d42e1712SStefan Haberland list_add(&cqr->blocklist, &format_queue); 2326d42e1712SStefan Haberland 2327d42e1712SStefan Haberland fdata->stop_unit = old_stop; 2328d42e1712SStefan Haberland fdata->start_unit++; 2329d42e1712SStefan Haberland 2330d42e1712SStefan Haberland if (fdata->start_unit > fdata->stop_unit) 2331d42e1712SStefan Haberland goto sleep; 2332d42e1712SStefan Haberland } 2333d42e1712SStefan Haberland 2334d42e1712SStefan Haberland retry: 2335d42e1712SStefan Haberland format_step = 255 / recs_per_track(&private->rdc_data, 0, 2336d42e1712SStefan Haberland fdata->blksize); 2337d42e1712SStefan Haberland while (fdata->start_unit <= old_stop) { 2338d42e1712SStefan Haberland step = fdata->stop_unit - fdata->start_unit + 1; 2339d42e1712SStefan Haberland if (step > format_step) 2340d42e1712SStefan Haberland fdata->stop_unit = fdata->start_unit + format_step - 1; 2341d42e1712SStefan Haberland 2342d42e1712SStefan Haberland cqr = dasd_eckd_build_format(base, fdata); 2343d42e1712SStefan Haberland if (IS_ERR(cqr)) { 2344d42e1712SStefan Haberland if (PTR_ERR(cqr) == -ENOMEM) { 2345d42e1712SStefan Haberland /* 2346d42e1712SStefan Haberland * not enough memory available 2347d42e1712SStefan Haberland * go to out and start requests 2348d42e1712SStefan Haberland * retry after first requests were finished 2349d42e1712SStefan Haberland */ 2350d42e1712SStefan Haberland fdata->stop_unit = old_stop; 2351d42e1712SStefan Haberland goto sleep; 2352d42e1712SStefan Haberland } else 2353d42e1712SStefan Haberland return PTR_ERR(cqr); 2354d42e1712SStefan Haberland } 2355d42e1712SStefan Haberland list_add(&cqr->blocklist, &format_queue); 2356d42e1712SStefan Haberland 2357d42e1712SStefan Haberland fdata->start_unit = fdata->stop_unit + 1; 2358d42e1712SStefan Haberland fdata->stop_unit = old_stop; 2359d42e1712SStefan Haberland } 2360d42e1712SStefan Haberland 2361d42e1712SStefan Haberland sleep: 2362d42e1712SStefan Haberland dasd_sleep_on_queue(&format_queue); 2363d42e1712SStefan Haberland 2364d42e1712SStefan Haberland list_for_each_entry_safe(cqr, n, &format_queue, blocklist) { 2365d42e1712SStefan Haberland device = cqr->startdev; 2366d42e1712SStefan Haberland private = (struct dasd_eckd_private *) device->private; 2367d42e1712SStefan Haberland if (cqr->status == DASD_CQR_FAILED) 2368d42e1712SStefan Haberland rc = -EIO; 2369d42e1712SStefan Haberland list_del_init(&cqr->blocklist); 2370d42e1712SStefan Haberland dasd_sfree_request(cqr, device); 2371d42e1712SStefan Haberland private->count--; 2372d42e1712SStefan Haberland } 2373d42e1712SStefan Haberland 2374d42e1712SStefan Haberland /* 2375d42e1712SStefan Haberland * in case of ENOMEM we need to retry after 2376d42e1712SStefan Haberland * first requests are finished 2377d42e1712SStefan Haberland */ 2378d42e1712SStefan Haberland if (fdata->start_unit <= fdata->stop_unit) 2379d42e1712SStefan Haberland goto retry; 2380d42e1712SStefan Haberland 2381d42e1712SStefan Haberland return rc; 2382d42e1712SStefan Haberland } 2383d42e1712SStefan Haberland 23848e09f215SStefan Weinhuber static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 23851da177e4SLinus Torvalds { 2386a2ace466SHannes Reinecke if (cqr->retries < 0) { 2387a2ace466SHannes Reinecke cqr->status = DASD_CQR_FAILED; 2388a2ace466SHannes Reinecke return; 2389a2ace466SHannes Reinecke } 23908e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 23918e09f215SStefan Weinhuber if (cqr->block && (cqr->startdev != cqr->block->base)) { 23928e09f215SStefan Weinhuber dasd_eckd_reset_ccw_to_base_io(cqr); 23938e09f215SStefan Weinhuber cqr->startdev = cqr->block->base; 2394a4d26c6aSStefan Weinhuber cqr->lpm = cqr->block->base->path_data.opm; 23951da177e4SLinus Torvalds } 23968e09f215SStefan Weinhuber }; 23971da177e4SLinus Torvalds 23981da177e4SLinus Torvalds static dasd_erp_fn_t 23991da177e4SLinus Torvalds dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 24001da177e4SLinus Torvalds { 24018e09f215SStefan Weinhuber struct dasd_device *device = (struct dasd_device *) cqr->startdev; 24021da177e4SLinus Torvalds struct ccw_device *cdev = device->cdev; 24031da177e4SLinus Torvalds 24041da177e4SLinus Torvalds switch (cdev->id.cu_type) { 24051da177e4SLinus Torvalds case 0x3990: 24061da177e4SLinus Torvalds case 0x2105: 24071da177e4SLinus Torvalds case 0x2107: 24081da177e4SLinus Torvalds case 0x1750: 24091da177e4SLinus Torvalds return dasd_3990_erp_action; 24101da177e4SLinus Torvalds case 0x9343: 24111da177e4SLinus Torvalds case 0x3880: 24121da177e4SLinus Torvalds default: 24131da177e4SLinus Torvalds return dasd_default_erp_action; 24141da177e4SLinus Torvalds } 24151da177e4SLinus Torvalds } 24161da177e4SLinus Torvalds 24171da177e4SLinus Torvalds static dasd_erp_fn_t 24181da177e4SLinus Torvalds dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 24191da177e4SLinus Torvalds { 24201da177e4SLinus Torvalds return dasd_default_erp_postaction; 24211da177e4SLinus Torvalds } 24221da177e4SLinus Torvalds 24235a27e60dSStefan Weinhuber static void dasd_eckd_check_for_device_change(struct dasd_device *device, 24245a27e60dSStefan Weinhuber struct dasd_ccw_req *cqr, 24258e09f215SStefan Weinhuber struct irb *irb) 24268e09f215SStefan Weinhuber { 24278e09f215SStefan Weinhuber char mask; 2428f3eb5384SStefan Weinhuber char *sense = NULL; 2429501183f2SStefan Haberland struct dasd_eckd_private *private; 24308e09f215SStefan Weinhuber 2431501183f2SStefan Haberland private = (struct dasd_eckd_private *) device->private; 24328e09f215SStefan Weinhuber /* first of all check for state change pending interrupt */ 24338e09f215SStefan Weinhuber mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 2434f3eb5384SStefan Weinhuber if ((scsw_dstat(&irb->scsw) & mask) == mask) { 2435c8d1c0ffSStefan Haberland /* 2436c8d1c0ffSStefan Haberland * for alias only, not in offline processing 2437c8d1c0ffSStefan Haberland * and only if not suspended 2438c8d1c0ffSStefan Haberland */ 2439501183f2SStefan Haberland if (!device->block && private->lcu && 244025e2cf1cSStefan Haberland device->state == DASD_STATE_ONLINE && 2441c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_OFFLINE, &device->flags) && 2442c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 2443501183f2SStefan Haberland /* 2444501183f2SStefan Haberland * the state change could be caused by an alias 2445501183f2SStefan Haberland * reassignment remove device from alias handling 2446501183f2SStefan Haberland * to prevent new requests from being scheduled on 2447501183f2SStefan Haberland * the wrong alias device 2448501183f2SStefan Haberland */ 2449501183f2SStefan Haberland dasd_alias_remove_device(device); 2450501183f2SStefan Haberland 2451501183f2SStefan Haberland /* schedule worker to reload device */ 2452501183f2SStefan Haberland dasd_reload_device(device); 2453501183f2SStefan Haberland } 24548e09f215SStefan Weinhuber dasd_generic_handle_state_change(device); 24558e09f215SStefan Weinhuber return; 24568e09f215SStefan Weinhuber } 24578e09f215SStefan Weinhuber 2458a5a0061fSStefan Weinhuber sense = dasd_get_sense(irb); 24595a27e60dSStefan Weinhuber if (!sense) 24605a27e60dSStefan Weinhuber return; 24615a27e60dSStefan Weinhuber 24625a27e60dSStefan Weinhuber /* summary unit check */ 2463c7a29e56SStefan Weinhuber if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) && 2464a5a0061fSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { 24658e09f215SStefan Weinhuber dasd_alias_handle_summary_unit_check(device, irb); 24668e09f215SStefan Weinhuber return; 24678e09f215SStefan Weinhuber } 24688e09f215SStefan Weinhuber 2469f60c768cSStefan Haberland /* service information message SIM */ 24705a27e60dSStefan Weinhuber if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && 2471f3eb5384SStefan Weinhuber ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 2472f3eb5384SStefan Weinhuber dasd_3990_erp_handle_sim(device, sense); 2473f60c768cSStefan Haberland return; 2474f60c768cSStefan Haberland } 2475f60c768cSStefan Haberland 24765a27e60dSStefan Weinhuber /* loss of device reservation is handled via base devices only 24775a27e60dSStefan Weinhuber * as alias devices may be used with several bases 24785a27e60dSStefan Weinhuber */ 2479c7a29e56SStefan Weinhuber if (device->block && (sense[27] & DASD_SENSE_BIT_0) && 2480c7a29e56SStefan Weinhuber (sense[7] == 0x3F) && 24815a27e60dSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && 24825a27e60dSStefan Weinhuber test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { 24835a27e60dSStefan Weinhuber if (device->features & DASD_FEATURE_FAILONSLCK) 24845a27e60dSStefan Weinhuber set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); 24855a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 24865a27e60dSStefan Weinhuber dev_err(&device->cdev->dev, 24875a27e60dSStefan Weinhuber "The device reservation was lost\n"); 2488ada3df91SStefan Haberland } 24895a27e60dSStefan Weinhuber } 2490f3eb5384SStefan Weinhuber 2491f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( 2492f3eb5384SStefan Weinhuber struct dasd_device *startdev, 24938e09f215SStefan Weinhuber struct dasd_block *block, 2494f3eb5384SStefan Weinhuber struct request *req, 2495f3eb5384SStefan Weinhuber sector_t first_rec, 2496f3eb5384SStefan Weinhuber sector_t last_rec, 2497f3eb5384SStefan Weinhuber sector_t first_trk, 2498f3eb5384SStefan Weinhuber sector_t last_trk, 2499f3eb5384SStefan Weinhuber unsigned int first_offs, 2500f3eb5384SStefan Weinhuber unsigned int last_offs, 2501f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 2502f3eb5384SStefan Weinhuber unsigned int blksize) 25031da177e4SLinus Torvalds { 25041da177e4SLinus Torvalds struct dasd_eckd_private *private; 25051da177e4SLinus Torvalds unsigned long *idaws; 25061da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 25071da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 25081da177e4SLinus Torvalds struct ccw1 *ccw; 25095705f702SNeilBrown struct req_iterator iter; 25101da177e4SLinus Torvalds struct bio_vec *bv; 25111da177e4SLinus Torvalds char *dst; 2512f3eb5384SStefan Weinhuber unsigned int off; 25131da177e4SLinus Torvalds int count, cidaw, cplength, datasize; 2514f3eb5384SStefan Weinhuber sector_t recid; 25151da177e4SLinus Torvalds unsigned char cmd, rcmd; 25168e09f215SStefan Weinhuber int use_prefix; 25178e09f215SStefan Weinhuber struct dasd_device *basedev; 25181da177e4SLinus Torvalds 25198e09f215SStefan Weinhuber basedev = block->base; 25208e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 25211da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 25221da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_READ_MT; 25231da177e4SLinus Torvalds else if (rq_data_dir(req) == WRITE) 25241da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_WRITE_MT; 25251da177e4SLinus Torvalds else 25261da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 2527f3eb5384SStefan Weinhuber 25281da177e4SLinus Torvalds /* Check struct bio and count the number of blocks for the request. */ 25291da177e4SLinus Torvalds count = 0; 25301da177e4SLinus Torvalds cidaw = 0; 25315705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 25321da177e4SLinus Torvalds if (bv->bv_len & (blksize - 1)) 25331da177e4SLinus Torvalds /* Eckd can only do full blocks. */ 25341da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 25358e09f215SStefan Weinhuber count += bv->bv_len >> (block->s2b_shift + 9); 2536347a8dc3SMartin Schwidefsky #if defined(CONFIG_64BIT) 25376c92e699SJens Axboe if (idal_is_needed (page_address(bv->bv_page), bv->bv_len)) 25388e09f215SStefan Weinhuber cidaw += bv->bv_len >> (block->s2b_shift + 9); 25391da177e4SLinus Torvalds #endif 25401da177e4SLinus Torvalds } 25411da177e4SLinus Torvalds /* Paranoia. */ 25421da177e4SLinus Torvalds if (count != last_rec - first_rec + 1) 25431da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 25448e09f215SStefan Weinhuber 25458e09f215SStefan Weinhuber /* use the prefix command if available */ 25468e09f215SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 25478e09f215SStefan Weinhuber if (use_prefix) { 25488e09f215SStefan Weinhuber /* 1x prefix + number of blocks */ 25498e09f215SStefan Weinhuber cplength = 2 + count; 25508e09f215SStefan Weinhuber /* 1x prefix + cidaws*sizeof(long) */ 25518e09f215SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 25528e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 25538e09f215SStefan Weinhuber cidaw * sizeof(unsigned long); 25548e09f215SStefan Weinhuber } else { 25551da177e4SLinus Torvalds /* 1x define extent + 1x locate record + number of blocks */ 25561da177e4SLinus Torvalds cplength = 2 + count; 25571da177e4SLinus Torvalds /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 25588e09f215SStefan Weinhuber datasize = sizeof(struct DE_eckd_data) + 25598e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 25601da177e4SLinus Torvalds cidaw * sizeof(unsigned long); 25618e09f215SStefan Weinhuber } 25621da177e4SLinus Torvalds /* Find out the number of additional locate record ccws for cdl. */ 25631da177e4SLinus Torvalds if (private->uses_cdl && first_rec < 2*blk_per_trk) { 25641da177e4SLinus Torvalds if (last_rec >= 2*blk_per_trk) 25651da177e4SLinus Torvalds count = 2*blk_per_trk - first_rec; 25661da177e4SLinus Torvalds cplength += count; 25671da177e4SLinus Torvalds datasize += count*sizeof(struct LO_eckd_data); 25681da177e4SLinus Torvalds } 25691da177e4SLinus Torvalds /* Allocate the ccw request. */ 257068b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 257168b781feSStefan Haberland startdev); 25721da177e4SLinus Torvalds if (IS_ERR(cqr)) 25731da177e4SLinus Torvalds return cqr; 25741da177e4SLinus Torvalds ccw = cqr->cpaddr; 25758e09f215SStefan Weinhuber /* First ccw is define extent or prefix. */ 25768e09f215SStefan Weinhuber if (use_prefix) { 25778e09f215SStefan Weinhuber if (prefix(ccw++, cqr->data, first_trk, 25788e09f215SStefan Weinhuber last_trk, cmd, basedev, startdev) == -EAGAIN) { 25798e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 25808e09f215SStefan Weinhuber * Try again later. 25818e09f215SStefan Weinhuber */ 25828e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2583d54853efSMartin Schwidefsky return ERR_PTR(-EAGAIN); 2584d54853efSMartin Schwidefsky } 25858e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 25868e09f215SStefan Weinhuber sizeof(struct PFX_eckd_data)); 25878e09f215SStefan Weinhuber } else { 25888e09f215SStefan Weinhuber if (define_extent(ccw++, cqr->data, first_trk, 2589b38f27e8SStefan Haberland last_trk, cmd, basedev) == -EAGAIN) { 25908e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 25918e09f215SStefan Weinhuber * Try again later. 25928e09f215SStefan Weinhuber */ 25938e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 25948e09f215SStefan Weinhuber return ERR_PTR(-EAGAIN); 25958e09f215SStefan Weinhuber } 25968e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 25978e09f215SStefan Weinhuber sizeof(struct DE_eckd_data)); 25988e09f215SStefan Weinhuber } 25991da177e4SLinus Torvalds /* Build locate_record+read/write/ccws. */ 26001da177e4SLinus Torvalds LO_data = (struct LO_eckd_data *) (idaws + cidaw); 26011da177e4SLinus Torvalds recid = first_rec; 26021da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 26031da177e4SLinus Torvalds /* Only standard blocks so there is just one locate record. */ 26041da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 26051da177e4SLinus Torvalds locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 26068e09f215SStefan Weinhuber last_rec - recid + 1, cmd, basedev, blksize); 26071da177e4SLinus Torvalds } 26085705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 26091da177e4SLinus Torvalds dst = page_address(bv->bv_page) + bv->bv_offset; 26101da177e4SLinus Torvalds if (dasd_page_cache) { 26111da177e4SLinus Torvalds char *copy = kmem_cache_alloc(dasd_page_cache, 2612441e143eSChristoph Lameter GFP_DMA | __GFP_NOWARN); 26131da177e4SLinus Torvalds if (copy && rq_data_dir(req) == WRITE) 26141da177e4SLinus Torvalds memcpy(copy + bv->bv_offset, dst, bv->bv_len); 26151da177e4SLinus Torvalds if (copy) 26161da177e4SLinus Torvalds dst = copy + bv->bv_offset; 26171da177e4SLinus Torvalds } 26181da177e4SLinus Torvalds for (off = 0; off < bv->bv_len; off += blksize) { 26191da177e4SLinus Torvalds sector_t trkid = recid; 26201da177e4SLinus Torvalds unsigned int recoffs = sector_div(trkid, blk_per_trk); 26211da177e4SLinus Torvalds rcmd = cmd; 26221da177e4SLinus Torvalds count = blksize; 26231da177e4SLinus Torvalds /* Locate record for cdl special block ? */ 26241da177e4SLinus Torvalds if (private->uses_cdl && recid < 2*blk_per_trk) { 26251da177e4SLinus Torvalds if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 26261da177e4SLinus Torvalds rcmd |= 0x8; 26271da177e4SLinus Torvalds count = dasd_eckd_cdl_reclen(recid); 2628ec5883abSHorst Hummel if (count < blksize && 2629ec5883abSHorst Hummel rq_data_dir(req) == READ) 26301da177e4SLinus Torvalds memset(dst + count, 0xe5, 26311da177e4SLinus Torvalds blksize - count); 26321da177e4SLinus Torvalds } 26331da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 26341da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 26351da177e4SLinus Torvalds trkid, recoffs + 1, 26368e09f215SStefan Weinhuber 1, rcmd, basedev, count); 26371da177e4SLinus Torvalds } 26381da177e4SLinus Torvalds /* Locate record for standard blocks ? */ 26391da177e4SLinus Torvalds if (private->uses_cdl && recid == 2*blk_per_trk) { 26401da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 26411da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 26421da177e4SLinus Torvalds trkid, recoffs + 1, 26431da177e4SLinus Torvalds last_rec - recid + 1, 26448e09f215SStefan Weinhuber cmd, basedev, count); 26451da177e4SLinus Torvalds } 26461da177e4SLinus Torvalds /* Read/write ccw. */ 26471da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 26481da177e4SLinus Torvalds ccw->cmd_code = rcmd; 26491da177e4SLinus Torvalds ccw->count = count; 26501da177e4SLinus Torvalds if (idal_is_needed(dst, blksize)) { 26511da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) idaws; 26521da177e4SLinus Torvalds ccw->flags = CCW_FLAG_IDA; 26531da177e4SLinus Torvalds idaws = idal_create_words(idaws, dst, blksize); 26541da177e4SLinus Torvalds } else { 26551da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) dst; 26561da177e4SLinus Torvalds ccw->flags = 0; 26571da177e4SLinus Torvalds } 26581da177e4SLinus Torvalds ccw++; 26591da177e4SLinus Torvalds dst += blksize; 26601da177e4SLinus Torvalds recid++; 26611da177e4SLinus Torvalds } 26621da177e4SLinus Torvalds } 266313de227bSHolger Smolinski if (blk_noretry_request(req) || 266413de227bSHolger Smolinski block->base->features & DASD_FEATURE_FAILFAST) 26651c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 26668e09f215SStefan Weinhuber cqr->startdev = startdev; 26678e09f215SStefan Weinhuber cqr->memdev = startdev; 26688e09f215SStefan Weinhuber cqr->block = block; 26697c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2670a4d26c6aSStefan Weinhuber cqr->lpm = startdev->path_data.ppm; 26711f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 26721aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 26731da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 26741da177e4SLinus Torvalds return cqr; 26751da177e4SLinus Torvalds } 26761da177e4SLinus Torvalds 2677f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 2678f3eb5384SStefan Weinhuber struct dasd_device *startdev, 2679f3eb5384SStefan Weinhuber struct dasd_block *block, 2680f3eb5384SStefan Weinhuber struct request *req, 2681f3eb5384SStefan Weinhuber sector_t first_rec, 2682f3eb5384SStefan Weinhuber sector_t last_rec, 2683f3eb5384SStefan Weinhuber sector_t first_trk, 2684f3eb5384SStefan Weinhuber sector_t last_trk, 2685f3eb5384SStefan Weinhuber unsigned int first_offs, 2686f3eb5384SStefan Weinhuber unsigned int last_offs, 2687f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 2688f3eb5384SStefan Weinhuber unsigned int blksize) 2689f3eb5384SStefan Weinhuber { 2690f3eb5384SStefan Weinhuber unsigned long *idaws; 2691f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 2692f3eb5384SStefan Weinhuber struct ccw1 *ccw; 2693f3eb5384SStefan Weinhuber struct req_iterator iter; 2694f3eb5384SStefan Weinhuber struct bio_vec *bv; 2695f3eb5384SStefan Weinhuber char *dst, *idaw_dst; 2696f3eb5384SStefan Weinhuber unsigned int cidaw, cplength, datasize; 2697f3eb5384SStefan Weinhuber unsigned int tlf; 2698f3eb5384SStefan Weinhuber sector_t recid; 2699f3eb5384SStefan Weinhuber unsigned char cmd; 2700f3eb5384SStefan Weinhuber struct dasd_device *basedev; 2701f3eb5384SStefan Weinhuber unsigned int trkcount, count, count_to_trk_end; 2702f3eb5384SStefan Weinhuber unsigned int idaw_len, seg_len, part_len, len_to_track_end; 2703f3eb5384SStefan Weinhuber unsigned char new_track, end_idaw; 2704f3eb5384SStefan Weinhuber sector_t trkid; 2705f3eb5384SStefan Weinhuber unsigned int recoffs; 2706f3eb5384SStefan Weinhuber 2707f3eb5384SStefan Weinhuber basedev = block->base; 2708f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) 2709f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 2710f3eb5384SStefan Weinhuber else if (rq_data_dir(req) == WRITE) 2711f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 2712f3eb5384SStefan Weinhuber else 2713f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 2714f3eb5384SStefan Weinhuber 2715f3eb5384SStefan Weinhuber /* Track based I/O needs IDAWs for each page, and not just for 2716f3eb5384SStefan Weinhuber * 64 bit addresses. We need additional idals for pages 2717f3eb5384SStefan Weinhuber * that get filled from two tracks, so we use the number 2718f3eb5384SStefan Weinhuber * of records as upper limit. 2719f3eb5384SStefan Weinhuber */ 2720f3eb5384SStefan Weinhuber cidaw = last_rec - first_rec + 1; 2721f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 2722f3eb5384SStefan Weinhuber 2723f3eb5384SStefan Weinhuber /* 1x prefix + one read/write ccw per track */ 2724f3eb5384SStefan Weinhuber cplength = 1 + trkcount; 2725f3eb5384SStefan Weinhuber 2726f3eb5384SStefan Weinhuber /* on 31-bit we need space for two 32 bit addresses per page 2727f3eb5384SStefan Weinhuber * on 64-bit one 64 bit address 2728f3eb5384SStefan Weinhuber */ 2729f3eb5384SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 2730f3eb5384SStefan Weinhuber cidaw * sizeof(unsigned long long); 2731f3eb5384SStefan Weinhuber 2732f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 273368b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 273468b781feSStefan Haberland startdev); 2735f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 2736f3eb5384SStefan Weinhuber return cqr; 2737f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 2738f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 2739f3eb5384SStefan Weinhuber if (first_trk == last_trk) 2740f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 2741f3eb5384SStefan Weinhuber else 2742f3eb5384SStefan Weinhuber tlf = last_offs + 1; 2743f3eb5384SStefan Weinhuber tlf *= blksize; 2744f3eb5384SStefan Weinhuber 2745f3eb5384SStefan Weinhuber if (prefix_LRE(ccw++, cqr->data, first_trk, 2746f3eb5384SStefan Weinhuber last_trk, cmd, basedev, startdev, 2747f3eb5384SStefan Weinhuber 1 /* format */, first_offs + 1, 2748f3eb5384SStefan Weinhuber trkcount, blksize, 2749f3eb5384SStefan Weinhuber tlf) == -EAGAIN) { 2750f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 2751f3eb5384SStefan Weinhuber * Try again later. 2752f3eb5384SStefan Weinhuber */ 2753f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2754f3eb5384SStefan Weinhuber return ERR_PTR(-EAGAIN); 2755f3eb5384SStefan Weinhuber } 2756f3eb5384SStefan Weinhuber 2757f3eb5384SStefan Weinhuber /* 2758f3eb5384SStefan Weinhuber * The translation of request into ccw programs must meet the 2759f3eb5384SStefan Weinhuber * following conditions: 2760f3eb5384SStefan Weinhuber * - all idaws but the first and the last must address full pages 2761f3eb5384SStefan Weinhuber * (or 2K blocks on 31-bit) 2762f3eb5384SStefan Weinhuber * - the scope of a ccw and it's idal ends with the track boundaries 2763f3eb5384SStefan Weinhuber */ 2764f3eb5384SStefan Weinhuber idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); 2765f3eb5384SStefan Weinhuber recid = first_rec; 2766f3eb5384SStefan Weinhuber new_track = 1; 2767f3eb5384SStefan Weinhuber end_idaw = 0; 2768f3eb5384SStefan Weinhuber len_to_track_end = 0; 2769246ccea1SMartin Schwidefsky idaw_dst = NULL; 2770f3eb5384SStefan Weinhuber idaw_len = 0; 2771f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 2772f3eb5384SStefan Weinhuber dst = page_address(bv->bv_page) + bv->bv_offset; 2773f3eb5384SStefan Weinhuber seg_len = bv->bv_len; 2774f3eb5384SStefan Weinhuber while (seg_len) { 2775f3eb5384SStefan Weinhuber if (new_track) { 2776f3eb5384SStefan Weinhuber trkid = recid; 2777f3eb5384SStefan Weinhuber recoffs = sector_div(trkid, blk_per_trk); 2778f3eb5384SStefan Weinhuber count_to_trk_end = blk_per_trk - recoffs; 2779f3eb5384SStefan Weinhuber count = min((last_rec - recid + 1), 2780f3eb5384SStefan Weinhuber (sector_t)count_to_trk_end); 2781f3eb5384SStefan Weinhuber len_to_track_end = count * blksize; 2782f3eb5384SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 2783f3eb5384SStefan Weinhuber ccw->cmd_code = cmd; 2784f3eb5384SStefan Weinhuber ccw->count = len_to_track_end; 2785f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 2786f3eb5384SStefan Weinhuber ccw->flags = CCW_FLAG_IDA; 2787f3eb5384SStefan Weinhuber ccw++; 2788f3eb5384SStefan Weinhuber recid += count; 2789f3eb5384SStefan Weinhuber new_track = 0; 279052db45c3SStefan Weinhuber /* first idaw for a ccw may start anywhere */ 279152db45c3SStefan Weinhuber if (!idaw_dst) 279252db45c3SStefan Weinhuber idaw_dst = dst; 2793f3eb5384SStefan Weinhuber } 279452db45c3SStefan Weinhuber /* If we start a new idaw, we must make sure that it 279552db45c3SStefan Weinhuber * starts on an IDA_BLOCK_SIZE boundary. 2796f3eb5384SStefan Weinhuber * If we continue an idaw, we must make sure that the 2797f3eb5384SStefan Weinhuber * current segment begins where the so far accumulated 2798f3eb5384SStefan Weinhuber * idaw ends 2799f3eb5384SStefan Weinhuber */ 280052db45c3SStefan Weinhuber if (!idaw_dst) { 280152db45c3SStefan Weinhuber if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { 280252db45c3SStefan Weinhuber dasd_sfree_request(cqr, startdev); 280352db45c3SStefan Weinhuber return ERR_PTR(-ERANGE); 280452db45c3SStefan Weinhuber } else 2805f3eb5384SStefan Weinhuber idaw_dst = dst; 280652db45c3SStefan Weinhuber } 2807f3eb5384SStefan Weinhuber if ((idaw_dst + idaw_len) != dst) { 2808f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2809f3eb5384SStefan Weinhuber return ERR_PTR(-ERANGE); 2810f3eb5384SStefan Weinhuber } 2811f3eb5384SStefan Weinhuber part_len = min(seg_len, len_to_track_end); 2812f3eb5384SStefan Weinhuber seg_len -= part_len; 2813f3eb5384SStefan Weinhuber dst += part_len; 2814f3eb5384SStefan Weinhuber idaw_len += part_len; 2815f3eb5384SStefan Weinhuber len_to_track_end -= part_len; 2816f3eb5384SStefan Weinhuber /* collected memory area ends on an IDA_BLOCK border, 2817f3eb5384SStefan Weinhuber * -> create an idaw 2818f3eb5384SStefan Weinhuber * idal_create_words will handle cases where idaw_len 2819f3eb5384SStefan Weinhuber * is larger then IDA_BLOCK_SIZE 2820f3eb5384SStefan Weinhuber */ 2821f3eb5384SStefan Weinhuber if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) 2822f3eb5384SStefan Weinhuber end_idaw = 1; 2823f3eb5384SStefan Weinhuber /* We also need to end the idaw at track end */ 2824f3eb5384SStefan Weinhuber if (!len_to_track_end) { 2825f3eb5384SStefan Weinhuber new_track = 1; 2826f3eb5384SStefan Weinhuber end_idaw = 1; 2827f3eb5384SStefan Weinhuber } 2828f3eb5384SStefan Weinhuber if (end_idaw) { 2829f3eb5384SStefan Weinhuber idaws = idal_create_words(idaws, idaw_dst, 2830f3eb5384SStefan Weinhuber idaw_len); 2831246ccea1SMartin Schwidefsky idaw_dst = NULL; 2832f3eb5384SStefan Weinhuber idaw_len = 0; 2833f3eb5384SStefan Weinhuber end_idaw = 0; 2834f3eb5384SStefan Weinhuber } 2835f3eb5384SStefan Weinhuber } 2836f3eb5384SStefan Weinhuber } 2837f3eb5384SStefan Weinhuber 2838f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 2839f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 2840f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2841f3eb5384SStefan Weinhuber cqr->startdev = startdev; 2842f3eb5384SStefan Weinhuber cqr->memdev = startdev; 2843f3eb5384SStefan Weinhuber cqr->block = block; 28447c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2845a4d26c6aSStefan Weinhuber cqr->lpm = startdev->path_data.ppm; 28461f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 28471aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 2848f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 2849f3eb5384SStefan Weinhuber return cqr; 2850f3eb5384SStefan Weinhuber } 2851f3eb5384SStefan Weinhuber 2852f3eb5384SStefan Weinhuber static int prepare_itcw(struct itcw *itcw, 2853f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 2854f3eb5384SStefan Weinhuber struct dasd_device *basedev, 2855f3eb5384SStefan Weinhuber struct dasd_device *startdev, 2856f3eb5384SStefan Weinhuber unsigned int rec_on_trk, int count, 2857f3eb5384SStefan Weinhuber unsigned int blksize, 2858f3eb5384SStefan Weinhuber unsigned int total_data_size, 2859f3eb5384SStefan Weinhuber unsigned int tlf, 2860f3eb5384SStefan Weinhuber unsigned int blk_per_trk) 2861f3eb5384SStefan Weinhuber { 2862f3eb5384SStefan Weinhuber struct PFX_eckd_data pfxdata; 2863f3eb5384SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 2864f3eb5384SStefan Weinhuber struct DE_eckd_data *dedata; 2865f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 2866f3eb5384SStefan Weinhuber struct dcw *dcw; 2867f3eb5384SStefan Weinhuber 2868f3eb5384SStefan Weinhuber u32 begcyl, endcyl; 2869f3eb5384SStefan Weinhuber u16 heads, beghead, endhead; 2870f3eb5384SStefan Weinhuber u8 pfx_cmd; 2871f3eb5384SStefan Weinhuber 2872f3eb5384SStefan Weinhuber int rc = 0; 2873f3eb5384SStefan Weinhuber int sector = 0; 2874f3eb5384SStefan Weinhuber int dn, d; 2875f3eb5384SStefan Weinhuber 2876f3eb5384SStefan Weinhuber 2877f3eb5384SStefan Weinhuber /* setup prefix data */ 2878f3eb5384SStefan Weinhuber basepriv = (struct dasd_eckd_private *) basedev->private; 2879f3eb5384SStefan Weinhuber startpriv = (struct dasd_eckd_private *) startdev->private; 2880f3eb5384SStefan Weinhuber dedata = &pfxdata.define_extent; 2881f3eb5384SStefan Weinhuber lredata = &pfxdata.locate_record; 2882f3eb5384SStefan Weinhuber 2883f3eb5384SStefan Weinhuber memset(&pfxdata, 0, sizeof(pfxdata)); 2884f3eb5384SStefan Weinhuber pfxdata.format = 1; /* PFX with LRE */ 2885f3eb5384SStefan Weinhuber pfxdata.base_address = basepriv->ned->unit_addr; 2886f3eb5384SStefan Weinhuber pfxdata.base_lss = basepriv->ned->ID; 2887f3eb5384SStefan Weinhuber pfxdata.validity.define_extent = 1; 2888f3eb5384SStefan Weinhuber 2889f3eb5384SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 2890f3eb5384SStefan Weinhuber if (startpriv->uid.type != UA_BASE_DEVICE) { 2891f3eb5384SStefan Weinhuber pfxdata.validity.verify_base = 1; 2892f3eb5384SStefan Weinhuber if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 2893f3eb5384SStefan Weinhuber pfxdata.validity.hyper_pav = 1; 2894f3eb5384SStefan Weinhuber } 2895f3eb5384SStefan Weinhuber 2896f3eb5384SStefan Weinhuber switch (cmd) { 2897f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 2898f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 2899f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 2900f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 2901f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 2902f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 2903f3eb5384SStefan Weinhuber lredata->operation.operation = 0x0C; 2904f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x01; 2905f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX_READ; 2906f3eb5384SStefan Weinhuber break; 2907f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 2908f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 2909f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 2910f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 2911f3eb5384SStefan Weinhuber rc = check_XRC_on_prefix(&pfxdata, basedev); 2912f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 2913f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 2914f3eb5384SStefan Weinhuber lredata->operation.operation = 0x3F; 2915f3eb5384SStefan Weinhuber lredata->extended_operation = 0x23; 2916f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x2; 2917f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX; 2918f3eb5384SStefan Weinhuber break; 2919f3eb5384SStefan Weinhuber default: 2920f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 2921f3eb5384SStefan Weinhuber "prepare itcw, unknown opcode 0x%x", cmd); 2922f3eb5384SStefan Weinhuber BUG(); 2923f3eb5384SStefan Weinhuber break; 2924f3eb5384SStefan Weinhuber } 2925f3eb5384SStefan Weinhuber if (rc) 2926f3eb5384SStefan Weinhuber return rc; 2927f3eb5384SStefan Weinhuber 2928f3eb5384SStefan Weinhuber dedata->attributes.mode = 0x3; /* ECKD */ 2929f3eb5384SStefan Weinhuber 2930f3eb5384SStefan Weinhuber heads = basepriv->rdc_data.trk_per_cyl; 2931f3eb5384SStefan Weinhuber begcyl = trk / heads; 2932f3eb5384SStefan Weinhuber beghead = trk % heads; 2933f3eb5384SStefan Weinhuber endcyl = totrk / heads; 2934f3eb5384SStefan Weinhuber endhead = totrk % heads; 2935f3eb5384SStefan Weinhuber 2936f3eb5384SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 2937f3eb5384SStefan Weinhuber if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 2938f3eb5384SStefan Weinhuber dedata->attributes.operation == DASD_SEQ_ACCESS) { 2939f3eb5384SStefan Weinhuber 2940f3eb5384SStefan Weinhuber if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 2941f3eb5384SStefan Weinhuber endcyl += basepriv->attrib.nr_cyl; 2942f3eb5384SStefan Weinhuber else 2943f3eb5384SStefan Weinhuber endcyl = (basepriv->real_cyl - 1); 2944f3eb5384SStefan Weinhuber } 2945f3eb5384SStefan Weinhuber 2946f3eb5384SStefan Weinhuber set_ch_t(&dedata->beg_ext, begcyl, beghead); 2947f3eb5384SStefan Weinhuber set_ch_t(&dedata->end_ext, endcyl, endhead); 2948f3eb5384SStefan Weinhuber 2949f3eb5384SStefan Weinhuber dedata->ep_format = 0x20; /* records per track is valid */ 2950f3eb5384SStefan Weinhuber dedata->ep_rec_per_track = blk_per_trk; 2951f3eb5384SStefan Weinhuber 2952f3eb5384SStefan Weinhuber if (rec_on_trk) { 2953f3eb5384SStefan Weinhuber switch (basepriv->rdc_data.dev_type) { 2954f3eb5384SStefan Weinhuber case 0x3390: 2955f3eb5384SStefan Weinhuber dn = ceil_quot(blksize + 6, 232); 2956f3eb5384SStefan Weinhuber d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); 2957f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 2958f3eb5384SStefan Weinhuber break; 2959f3eb5384SStefan Weinhuber case 0x3380: 2960f3eb5384SStefan Weinhuber d = 7 + ceil_quot(blksize + 12, 32); 2961f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 2962f3eb5384SStefan Weinhuber break; 2963f3eb5384SStefan Weinhuber } 2964f3eb5384SStefan Weinhuber } 2965f3eb5384SStefan Weinhuber 2966f3eb5384SStefan Weinhuber lredata->auxiliary.length_valid = 1; 2967f3eb5384SStefan Weinhuber lredata->auxiliary.length_scope = 1; 2968f3eb5384SStefan Weinhuber lredata->auxiliary.imbedded_ccw_valid = 1; 2969f3eb5384SStefan Weinhuber lredata->length = tlf; 2970f3eb5384SStefan Weinhuber lredata->imbedded_ccw = cmd; 2971f3eb5384SStefan Weinhuber lredata->count = count; 2972f3eb5384SStefan Weinhuber lredata->sector = sector; 2973f3eb5384SStefan Weinhuber set_ch_t(&lredata->seek_addr, begcyl, beghead); 2974f3eb5384SStefan Weinhuber lredata->search_arg.cyl = lredata->seek_addr.cyl; 2975f3eb5384SStefan Weinhuber lredata->search_arg.head = lredata->seek_addr.head; 2976f3eb5384SStefan Weinhuber lredata->search_arg.record = rec_on_trk; 2977f3eb5384SStefan Weinhuber 2978f3eb5384SStefan Weinhuber dcw = itcw_add_dcw(itcw, pfx_cmd, 0, 2979f3eb5384SStefan Weinhuber &pfxdata, sizeof(pfxdata), total_data_size); 298082a7b955SThomas Meyer return PTR_RET(dcw); 2981f3eb5384SStefan Weinhuber } 2982f3eb5384SStefan Weinhuber 2983f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 2984f3eb5384SStefan Weinhuber struct dasd_device *startdev, 2985f3eb5384SStefan Weinhuber struct dasd_block *block, 2986f3eb5384SStefan Weinhuber struct request *req, 2987f3eb5384SStefan Weinhuber sector_t first_rec, 2988f3eb5384SStefan Weinhuber sector_t last_rec, 2989f3eb5384SStefan Weinhuber sector_t first_trk, 2990f3eb5384SStefan Weinhuber sector_t last_trk, 2991f3eb5384SStefan Weinhuber unsigned int first_offs, 2992f3eb5384SStefan Weinhuber unsigned int last_offs, 2993f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 2994f3eb5384SStefan Weinhuber unsigned int blksize) 2995f3eb5384SStefan Weinhuber { 2996f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 2997f3eb5384SStefan Weinhuber struct req_iterator iter; 2998f3eb5384SStefan Weinhuber struct bio_vec *bv; 2999f3eb5384SStefan Weinhuber char *dst; 3000f3eb5384SStefan Weinhuber unsigned int trkcount, ctidaw; 3001f3eb5384SStefan Weinhuber unsigned char cmd; 3002f3eb5384SStefan Weinhuber struct dasd_device *basedev; 3003f3eb5384SStefan Weinhuber unsigned int tlf; 3004f3eb5384SStefan Weinhuber struct itcw *itcw; 3005f3eb5384SStefan Weinhuber struct tidaw *last_tidaw = NULL; 3006f3eb5384SStefan Weinhuber int itcw_op; 3007f3eb5384SStefan Weinhuber size_t itcw_size; 3008ef19298bSStefan Weinhuber u8 tidaw_flags; 3009ef19298bSStefan Weinhuber unsigned int seg_len, part_len, len_to_track_end; 3010ef19298bSStefan Weinhuber unsigned char new_track; 3011ef19298bSStefan Weinhuber sector_t recid, trkid; 3012ef19298bSStefan Weinhuber unsigned int offs; 3013ef19298bSStefan Weinhuber unsigned int count, count_to_trk_end; 3014cd10502bSJulia Lawall int ret; 3015f3eb5384SStefan Weinhuber 3016f3eb5384SStefan Weinhuber basedev = block->base; 3017f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) { 3018f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 3019f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_READ; 3020f3eb5384SStefan Weinhuber } else if (rq_data_dir(req) == WRITE) { 3021f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 3022f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_WRITE; 3023f3eb5384SStefan Weinhuber } else 3024f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 3025f3eb5384SStefan Weinhuber 3026f3eb5384SStefan Weinhuber /* trackbased I/O needs address all memory via TIDAWs, 3027f3eb5384SStefan Weinhuber * not just for 64 bit addresses. This allows us to map 3028f3eb5384SStefan Weinhuber * each segment directly to one tidaw. 3029ef19298bSStefan Weinhuber * In the case of write requests, additional tidaws may 3030ef19298bSStefan Weinhuber * be needed when a segment crosses a track boundary. 3031f3eb5384SStefan Weinhuber */ 3032f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 3033f3eb5384SStefan Weinhuber ctidaw = 0; 3034f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 3035f3eb5384SStefan Weinhuber ++ctidaw; 3036f3eb5384SStefan Weinhuber } 3037ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 3038ef19298bSStefan Weinhuber ctidaw += (last_trk - first_trk); 3039f3eb5384SStefan Weinhuber 3040f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 3041f3eb5384SStefan Weinhuber itcw_size = itcw_calc_size(0, ctidaw, 0); 304268b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 3043f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 3044f3eb5384SStefan Weinhuber return cqr; 3045f3eb5384SStefan Weinhuber 3046f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 3047f3eb5384SStefan Weinhuber if (first_trk == last_trk) 3048f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 3049f3eb5384SStefan Weinhuber else 3050f3eb5384SStefan Weinhuber tlf = last_offs + 1; 3051f3eb5384SStefan Weinhuber tlf *= blksize; 3052f3eb5384SStefan Weinhuber 3053f3eb5384SStefan Weinhuber itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); 3054ef19298bSStefan Weinhuber if (IS_ERR(itcw)) { 3055cd10502bSJulia Lawall ret = -EINVAL; 3056cd10502bSJulia Lawall goto out_error; 3057ef19298bSStefan Weinhuber } 3058f3eb5384SStefan Weinhuber cqr->cpaddr = itcw_get_tcw(itcw); 3059f3eb5384SStefan Weinhuber if (prepare_itcw(itcw, first_trk, last_trk, 3060f3eb5384SStefan Weinhuber cmd, basedev, startdev, 3061f3eb5384SStefan Weinhuber first_offs + 1, 3062f3eb5384SStefan Weinhuber trkcount, blksize, 3063f3eb5384SStefan Weinhuber (last_rec - first_rec + 1) * blksize, 3064f3eb5384SStefan Weinhuber tlf, blk_per_trk) == -EAGAIN) { 3065f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 3066f3eb5384SStefan Weinhuber * Try again later. 3067f3eb5384SStefan Weinhuber */ 3068cd10502bSJulia Lawall ret = -EAGAIN; 3069cd10502bSJulia Lawall goto out_error; 3070f3eb5384SStefan Weinhuber } 3071d54cddb6SHeiko Carstens len_to_track_end = 0; 3072f3eb5384SStefan Weinhuber /* 3073f3eb5384SStefan Weinhuber * A tidaw can address 4k of memory, but must not cross page boundaries 3074f3eb5384SStefan Weinhuber * We can let the block layer handle this by setting 3075f3eb5384SStefan Weinhuber * blk_queue_segment_boundary to page boundaries and 3076f3eb5384SStefan Weinhuber * blk_max_segment_size to page size when setting up the request queue. 3077ef19298bSStefan Weinhuber * For write requests, a TIDAW must not cross track boundaries, because 3078ef19298bSStefan Weinhuber * we have to set the CBC flag on the last tidaw for each track. 3079f3eb5384SStefan Weinhuber */ 3080ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) { 3081ef19298bSStefan Weinhuber new_track = 1; 3082ef19298bSStefan Weinhuber recid = first_rec; 3083f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 3084f3eb5384SStefan Weinhuber dst = page_address(bv->bv_page) + bv->bv_offset; 3085ef19298bSStefan Weinhuber seg_len = bv->bv_len; 3086ef19298bSStefan Weinhuber while (seg_len) { 3087ef19298bSStefan Weinhuber if (new_track) { 3088ef19298bSStefan Weinhuber trkid = recid; 3089ef19298bSStefan Weinhuber offs = sector_div(trkid, blk_per_trk); 3090ef19298bSStefan Weinhuber count_to_trk_end = blk_per_trk - offs; 3091ef19298bSStefan Weinhuber count = min((last_rec - recid + 1), 3092ef19298bSStefan Weinhuber (sector_t)count_to_trk_end); 3093ef19298bSStefan Weinhuber len_to_track_end = count * blksize; 3094ef19298bSStefan Weinhuber recid += count; 3095ef19298bSStefan Weinhuber new_track = 0; 3096f3eb5384SStefan Weinhuber } 3097ef19298bSStefan Weinhuber part_len = min(seg_len, len_to_track_end); 3098ef19298bSStefan Weinhuber seg_len -= part_len; 3099ef19298bSStefan Weinhuber len_to_track_end -= part_len; 3100ef19298bSStefan Weinhuber /* We need to end the tidaw at track end */ 3101ef19298bSStefan Weinhuber if (!len_to_track_end) { 3102ef19298bSStefan Weinhuber new_track = 1; 3103ef19298bSStefan Weinhuber tidaw_flags = TIDAW_FLAGS_INSERT_CBC; 3104ef19298bSStefan Weinhuber } else 3105ef19298bSStefan Weinhuber tidaw_flags = 0; 3106ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, 3107ef19298bSStefan Weinhuber dst, part_len); 3108cd10502bSJulia Lawall if (IS_ERR(last_tidaw)) { 3109cd10502bSJulia Lawall ret = -EINVAL; 3110cd10502bSJulia Lawall goto out_error; 3111cd10502bSJulia Lawall } 3112ef19298bSStefan Weinhuber dst += part_len; 3113ef19298bSStefan Weinhuber } 3114ef19298bSStefan Weinhuber } 3115ef19298bSStefan Weinhuber } else { 3116ef19298bSStefan Weinhuber rq_for_each_segment(bv, req, iter) { 3117ef19298bSStefan Weinhuber dst = page_address(bv->bv_page) + bv->bv_offset; 3118ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, 0x00, 3119ef19298bSStefan Weinhuber dst, bv->bv_len); 3120cd10502bSJulia Lawall if (IS_ERR(last_tidaw)) { 3121cd10502bSJulia Lawall ret = -EINVAL; 3122cd10502bSJulia Lawall goto out_error; 3123cd10502bSJulia Lawall } 3124ef19298bSStefan Weinhuber } 3125ef19298bSStefan Weinhuber } 3126ef19298bSStefan Weinhuber last_tidaw->flags |= TIDAW_FLAGS_LAST; 3127ef19298bSStefan Weinhuber last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; 3128f3eb5384SStefan Weinhuber itcw_finalize(itcw); 3129f3eb5384SStefan Weinhuber 3130f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 3131f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 3132f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3133ef19298bSStefan Weinhuber cqr->cpmode = 1; 3134f3eb5384SStefan Weinhuber cqr->startdev = startdev; 3135f3eb5384SStefan Weinhuber cqr->memdev = startdev; 3136f3eb5384SStefan Weinhuber cqr->block = block; 31377c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 3138a4d26c6aSStefan Weinhuber cqr->lpm = startdev->path_data.ppm; 31391f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 31401aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 3141f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 3142f3eb5384SStefan Weinhuber return cqr; 3143cd10502bSJulia Lawall out_error: 3144cd10502bSJulia Lawall dasd_sfree_request(cqr, startdev); 3145cd10502bSJulia Lawall return ERR_PTR(ret); 3146f3eb5384SStefan Weinhuber } 3147f3eb5384SStefan Weinhuber 3148f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 3149f3eb5384SStefan Weinhuber struct dasd_block *block, 3150f3eb5384SStefan Weinhuber struct request *req) 3151f3eb5384SStefan Weinhuber { 3152ef19298bSStefan Weinhuber int cmdrtd, cmdwtd; 3153f3eb5384SStefan Weinhuber int use_prefix; 3154ef19298bSStefan Weinhuber int fcx_multitrack; 315545b44d76SStefan Weinhuber struct dasd_eckd_private *private; 3156f3eb5384SStefan Weinhuber struct dasd_device *basedev; 3157f3eb5384SStefan Weinhuber sector_t first_rec, last_rec; 3158f3eb5384SStefan Weinhuber sector_t first_trk, last_trk; 3159f3eb5384SStefan Weinhuber unsigned int first_offs, last_offs; 3160f3eb5384SStefan Weinhuber unsigned int blk_per_trk, blksize; 3161f3eb5384SStefan Weinhuber int cdlspecial; 3162ef19298bSStefan Weinhuber unsigned int data_size; 3163f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 3164f3eb5384SStefan Weinhuber 3165f3eb5384SStefan Weinhuber basedev = block->base; 3166f3eb5384SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 3167f3eb5384SStefan Weinhuber 3168f3eb5384SStefan Weinhuber /* Calculate number of blocks/records per track. */ 3169f3eb5384SStefan Weinhuber blksize = block->bp_block; 3170f3eb5384SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 31716fca97a9SStefan Haberland if (blk_per_trk == 0) 31726fca97a9SStefan Haberland return ERR_PTR(-EINVAL); 3173f3eb5384SStefan Weinhuber /* Calculate record id of first and last block. */ 317483096ebfSTejun Heo first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; 3175f3eb5384SStefan Weinhuber first_offs = sector_div(first_trk, blk_per_trk); 3176f3eb5384SStefan Weinhuber last_rec = last_trk = 317783096ebfSTejun Heo (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 3178f3eb5384SStefan Weinhuber last_offs = sector_div(last_trk, blk_per_trk); 3179f3eb5384SStefan Weinhuber cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); 3180f3eb5384SStefan Weinhuber 3181ef19298bSStefan Weinhuber fcx_multitrack = private->features.feature[40] & 0x20; 3182ef19298bSStefan Weinhuber data_size = blk_rq_bytes(req); 3183ef19298bSStefan Weinhuber /* tpm write request add CBC data on each track boundary */ 3184ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 3185ef19298bSStefan Weinhuber data_size += (last_trk - first_trk) * 4; 3186f3eb5384SStefan Weinhuber 3187f3eb5384SStefan Weinhuber /* is read track data and write track data in command mode supported? */ 3188f3eb5384SStefan Weinhuber cmdrtd = private->features.feature[9] & 0x20; 3189f3eb5384SStefan Weinhuber cmdwtd = private->features.feature[12] & 0x40; 3190f3eb5384SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 3191f3eb5384SStefan Weinhuber 3192f3eb5384SStefan Weinhuber cqr = NULL; 3193f3eb5384SStefan Weinhuber if (cdlspecial || dasd_page_cache) { 3194f3eb5384SStefan Weinhuber /* do nothing, just fall through to the cmd mode single case */ 3195ef19298bSStefan Weinhuber } else if ((data_size <= private->fcx_max_data) 3196ef19298bSStefan Weinhuber && (fcx_multitrack || (first_trk == last_trk))) { 3197f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, 3198f3eb5384SStefan Weinhuber first_rec, last_rec, 3199f3eb5384SStefan Weinhuber first_trk, last_trk, 3200f3eb5384SStefan Weinhuber first_offs, last_offs, 3201f3eb5384SStefan Weinhuber blk_per_trk, blksize); 3202ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3203ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 3204f3eb5384SStefan Weinhuber cqr = NULL; 3205f3eb5384SStefan Weinhuber } else if (use_prefix && 3206f3eb5384SStefan Weinhuber (((rq_data_dir(req) == READ) && cmdrtd) || 3207f3eb5384SStefan Weinhuber ((rq_data_dir(req) == WRITE) && cmdwtd))) { 3208f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, 3209f3eb5384SStefan Weinhuber first_rec, last_rec, 3210f3eb5384SStefan Weinhuber first_trk, last_trk, 3211f3eb5384SStefan Weinhuber first_offs, last_offs, 3212f3eb5384SStefan Weinhuber blk_per_trk, blksize); 3213ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3214ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 3215f3eb5384SStefan Weinhuber cqr = NULL; 3216f3eb5384SStefan Weinhuber } 3217f3eb5384SStefan Weinhuber if (!cqr) 3218f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, 3219f3eb5384SStefan Weinhuber first_rec, last_rec, 3220f3eb5384SStefan Weinhuber first_trk, last_trk, 3221f3eb5384SStefan Weinhuber first_offs, last_offs, 3222f3eb5384SStefan Weinhuber blk_per_trk, blksize); 3223f3eb5384SStefan Weinhuber return cqr; 3224f3eb5384SStefan Weinhuber } 3225f3eb5384SStefan Weinhuber 3226e4dbb0f2SStefan Haberland static struct dasd_ccw_req *dasd_raw_build_cp(struct dasd_device *startdev, 3227e4dbb0f2SStefan Haberland struct dasd_block *block, 3228e4dbb0f2SStefan Haberland struct request *req) 3229e4dbb0f2SStefan Haberland { 3230e4dbb0f2SStefan Haberland unsigned long *idaws; 3231e4dbb0f2SStefan Haberland struct dasd_device *basedev; 3232e4dbb0f2SStefan Haberland struct dasd_ccw_req *cqr; 3233e4dbb0f2SStefan Haberland struct ccw1 *ccw; 3234e4dbb0f2SStefan Haberland struct req_iterator iter; 3235e4dbb0f2SStefan Haberland struct bio_vec *bv; 3236e4dbb0f2SStefan Haberland char *dst; 3237e4dbb0f2SStefan Haberland unsigned char cmd; 3238e4dbb0f2SStefan Haberland unsigned int trkcount; 3239e4dbb0f2SStefan Haberland unsigned int seg_len, len_to_track_end; 3240e4dbb0f2SStefan Haberland unsigned int first_offs; 3241e4dbb0f2SStefan Haberland unsigned int cidaw, cplength, datasize; 3242558b9ef0SStefan Weinhuber sector_t first_trk, last_trk, sectors; 3243558b9ef0SStefan Weinhuber sector_t start_padding_sectors, end_sector_offset, end_padding_sectors; 3244e4dbb0f2SStefan Haberland unsigned int pfx_datasize; 3245e4dbb0f2SStefan Haberland 3246e4dbb0f2SStefan Haberland /* 3247e4dbb0f2SStefan Haberland * raw track access needs to be mutiple of 64k and on 64k boundary 3248558b9ef0SStefan Weinhuber * For read requests we can fix an incorrect alignment by padding 3249558b9ef0SStefan Weinhuber * the request with dummy pages. 3250e4dbb0f2SStefan Haberland */ 3251558b9ef0SStefan Weinhuber start_padding_sectors = blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK; 3252558b9ef0SStefan Weinhuber end_sector_offset = (blk_rq_pos(req) + blk_rq_sectors(req)) % 3253558b9ef0SStefan Weinhuber DASD_RAW_SECTORS_PER_TRACK; 3254558b9ef0SStefan Weinhuber end_padding_sectors = (DASD_RAW_SECTORS_PER_TRACK - end_sector_offset) % 3255558b9ef0SStefan Weinhuber DASD_RAW_SECTORS_PER_TRACK; 3256558b9ef0SStefan Weinhuber basedev = block->base; 3257558b9ef0SStefan Weinhuber if ((start_padding_sectors || end_padding_sectors) && 3258558b9ef0SStefan Weinhuber (rq_data_dir(req) == WRITE)) { 3259558b9ef0SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 3260558b9ef0SStefan Weinhuber "raw write not track aligned (%lu,%lu) req %p", 3261558b9ef0SStefan Weinhuber start_padding_sectors, end_padding_sectors, req); 3262e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EINVAL); 3263e4dbb0f2SStefan Haberland goto out; 3264e4dbb0f2SStefan Haberland } 3265e4dbb0f2SStefan Haberland 3266e4dbb0f2SStefan Haberland first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; 3267e4dbb0f2SStefan Haberland last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / 3268e4dbb0f2SStefan Haberland DASD_RAW_SECTORS_PER_TRACK; 3269e4dbb0f2SStefan Haberland trkcount = last_trk - first_trk + 1; 3270e4dbb0f2SStefan Haberland first_offs = 0; 3271e4dbb0f2SStefan Haberland 3272e4dbb0f2SStefan Haberland if (rq_data_dir(req) == READ) 3273e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_READ_TRACK; 3274e4dbb0f2SStefan Haberland else if (rq_data_dir(req) == WRITE) 3275e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; 3276e4dbb0f2SStefan Haberland else { 3277e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EINVAL); 3278e4dbb0f2SStefan Haberland goto out; 3279e4dbb0f2SStefan Haberland } 3280e4dbb0f2SStefan Haberland 3281e4dbb0f2SStefan Haberland /* 3282e4dbb0f2SStefan Haberland * Raw track based I/O needs IDAWs for each page, 3283e4dbb0f2SStefan Haberland * and not just for 64 bit addresses. 3284e4dbb0f2SStefan Haberland */ 3285e4dbb0f2SStefan Haberland cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; 3286e4dbb0f2SStefan Haberland 3287e4dbb0f2SStefan Haberland /* 1x prefix + one read/write ccw per track */ 3288e4dbb0f2SStefan Haberland cplength = 1 + trkcount; 3289e4dbb0f2SStefan Haberland 3290e4dbb0f2SStefan Haberland /* 3291e4dbb0f2SStefan Haberland * struct PFX_eckd_data has up to 2 byte as extended parameter 3292e4dbb0f2SStefan Haberland * this is needed for write full track and has to be mentioned 329325985edcSLucas De Marchi * separately 3294e4dbb0f2SStefan Haberland * add 8 instead of 2 to keep 8 byte boundary 3295e4dbb0f2SStefan Haberland */ 3296e4dbb0f2SStefan Haberland pfx_datasize = sizeof(struct PFX_eckd_data) + 8; 3297e4dbb0f2SStefan Haberland 3298e4dbb0f2SStefan Haberland datasize = pfx_datasize + cidaw * sizeof(unsigned long long); 3299e4dbb0f2SStefan Haberland 3300e4dbb0f2SStefan Haberland /* Allocate the ccw request. */ 3301e4dbb0f2SStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 3302e4dbb0f2SStefan Haberland datasize, startdev); 3303e4dbb0f2SStefan Haberland if (IS_ERR(cqr)) 3304e4dbb0f2SStefan Haberland goto out; 3305e4dbb0f2SStefan Haberland ccw = cqr->cpaddr; 3306e4dbb0f2SStefan Haberland 3307e4dbb0f2SStefan Haberland if (prefix_LRE(ccw++, cqr->data, first_trk, last_trk, cmd, 3308e4dbb0f2SStefan Haberland basedev, startdev, 1 /* format */, first_offs + 1, 3309e4dbb0f2SStefan Haberland trkcount, 0, 0) == -EAGAIN) { 3310e4dbb0f2SStefan Haberland /* Clock not in sync and XRC is enabled. 3311e4dbb0f2SStefan Haberland * Try again later. 3312e4dbb0f2SStefan Haberland */ 3313e4dbb0f2SStefan Haberland dasd_sfree_request(cqr, startdev); 3314e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EAGAIN); 3315e4dbb0f2SStefan Haberland goto out; 3316e4dbb0f2SStefan Haberland } 3317e4dbb0f2SStefan Haberland 3318e4dbb0f2SStefan Haberland idaws = (unsigned long *)(cqr->data + pfx_datasize); 3319e4dbb0f2SStefan Haberland len_to_track_end = 0; 3320558b9ef0SStefan Weinhuber if (start_padding_sectors) { 3321558b9ef0SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 3322558b9ef0SStefan Weinhuber ccw->cmd_code = cmd; 3323558b9ef0SStefan Weinhuber /* maximum 3390 track size */ 3324558b9ef0SStefan Weinhuber ccw->count = 57326; 3325558b9ef0SStefan Weinhuber /* 64k map to one track */ 3326558b9ef0SStefan Weinhuber len_to_track_end = 65536 - start_padding_sectors * 512; 3327558b9ef0SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 3328558b9ef0SStefan Weinhuber ccw->flags |= CCW_FLAG_IDA; 3329558b9ef0SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3330558b9ef0SStefan Weinhuber ccw++; 3331558b9ef0SStefan Weinhuber for (sectors = 0; sectors < start_padding_sectors; sectors += 8) 3332558b9ef0SStefan Weinhuber idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 3333558b9ef0SStefan Weinhuber } 3334e4dbb0f2SStefan Haberland rq_for_each_segment(bv, req, iter) { 3335e4dbb0f2SStefan Haberland dst = page_address(bv->bv_page) + bv->bv_offset; 3336e4dbb0f2SStefan Haberland seg_len = bv->bv_len; 3337558b9ef0SStefan Weinhuber if (cmd == DASD_ECKD_CCW_READ_TRACK) 3338558b9ef0SStefan Weinhuber memset(dst, 0, seg_len); 3339e4dbb0f2SStefan Haberland if (!len_to_track_end) { 3340e4dbb0f2SStefan Haberland ccw[-1].flags |= CCW_FLAG_CC; 3341e4dbb0f2SStefan Haberland ccw->cmd_code = cmd; 3342e4dbb0f2SStefan Haberland /* maximum 3390 track size */ 3343e4dbb0f2SStefan Haberland ccw->count = 57326; 3344e4dbb0f2SStefan Haberland /* 64k map to one track */ 3345e4dbb0f2SStefan Haberland len_to_track_end = 65536; 3346e4dbb0f2SStefan Haberland ccw->cda = (__u32)(addr_t)idaws; 3347e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_IDA; 3348e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 3349e4dbb0f2SStefan Haberland ccw++; 3350e4dbb0f2SStefan Haberland } 3351e4dbb0f2SStefan Haberland len_to_track_end -= seg_len; 3352e4dbb0f2SStefan Haberland idaws = idal_create_words(idaws, dst, seg_len); 3353e4dbb0f2SStefan Haberland } 3354558b9ef0SStefan Weinhuber for (sectors = 0; sectors < end_padding_sectors; sectors += 8) 3355558b9ef0SStefan Weinhuber idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 3356e4dbb0f2SStefan Haberland if (blk_noretry_request(req) || 3357e4dbb0f2SStefan Haberland block->base->features & DASD_FEATURE_FAILFAST) 3358e4dbb0f2SStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3359e4dbb0f2SStefan Haberland cqr->startdev = startdev; 3360e4dbb0f2SStefan Haberland cqr->memdev = startdev; 3361e4dbb0f2SStefan Haberland cqr->block = block; 3362e4dbb0f2SStefan Haberland cqr->expires = startdev->default_expires * HZ; 3363e4dbb0f2SStefan Haberland cqr->lpm = startdev->path_data.ppm; 33641f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 33651aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 3366e4dbb0f2SStefan Haberland cqr->status = DASD_CQR_FILLED; 3367e4dbb0f2SStefan Haberland 3368e4dbb0f2SStefan Haberland if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN) 3369e4dbb0f2SStefan Haberland cqr = NULL; 3370e4dbb0f2SStefan Haberland out: 3371e4dbb0f2SStefan Haberland return cqr; 3372e4dbb0f2SStefan Haberland } 3373e4dbb0f2SStefan Haberland 3374e4dbb0f2SStefan Haberland 33751da177e4SLinus Torvalds static int 33761da177e4SLinus Torvalds dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 33771da177e4SLinus Torvalds { 33781da177e4SLinus Torvalds struct dasd_eckd_private *private; 33791da177e4SLinus Torvalds struct ccw1 *ccw; 33805705f702SNeilBrown struct req_iterator iter; 33811da177e4SLinus Torvalds struct bio_vec *bv; 33821da177e4SLinus Torvalds char *dst, *cda; 33831da177e4SLinus Torvalds unsigned int blksize, blk_per_trk, off; 33841da177e4SLinus Torvalds sector_t recid; 33855705f702SNeilBrown int status; 33861da177e4SLinus Torvalds 33871da177e4SLinus Torvalds if (!dasd_page_cache) 33881da177e4SLinus Torvalds goto out; 33898e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) cqr->block->base->private; 33908e09f215SStefan Weinhuber blksize = cqr->block->bp_block; 33911da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 339283096ebfSTejun Heo recid = blk_rq_pos(req) >> cqr->block->s2b_shift; 33931da177e4SLinus Torvalds ccw = cqr->cpaddr; 33941da177e4SLinus Torvalds /* Skip over define extent & locate record. */ 33951da177e4SLinus Torvalds ccw++; 33961da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 33971da177e4SLinus Torvalds ccw++; 33985705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 33991da177e4SLinus Torvalds dst = page_address(bv->bv_page) + bv->bv_offset; 34001da177e4SLinus Torvalds for (off = 0; off < bv->bv_len; off += blksize) { 34011da177e4SLinus Torvalds /* Skip locate record. */ 34021da177e4SLinus Torvalds if (private->uses_cdl && recid <= 2*blk_per_trk) 34031da177e4SLinus Torvalds ccw++; 34041da177e4SLinus Torvalds if (dst) { 34051da177e4SLinus Torvalds if (ccw->flags & CCW_FLAG_IDA) 34061da177e4SLinus Torvalds cda = *((char **)((addr_t) ccw->cda)); 34071da177e4SLinus Torvalds else 34081da177e4SLinus Torvalds cda = (char *)((addr_t) ccw->cda); 34091da177e4SLinus Torvalds if (dst != cda) { 34101da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 34111da177e4SLinus Torvalds memcpy(dst, cda, bv->bv_len); 34121da177e4SLinus Torvalds kmem_cache_free(dasd_page_cache, 34131da177e4SLinus Torvalds (void *)((addr_t)cda & PAGE_MASK)); 34141da177e4SLinus Torvalds } 34151da177e4SLinus Torvalds dst = NULL; 34161da177e4SLinus Torvalds } 34171da177e4SLinus Torvalds ccw++; 34181da177e4SLinus Torvalds recid++; 34191da177e4SLinus Torvalds } 34201da177e4SLinus Torvalds } 34211da177e4SLinus Torvalds out: 34221da177e4SLinus Torvalds status = cqr->status == DASD_CQR_DONE; 34238e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 34241da177e4SLinus Torvalds return status; 34251da177e4SLinus Torvalds } 34261da177e4SLinus Torvalds 34278e09f215SStefan Weinhuber /* 3428f3eb5384SStefan Weinhuber * Modify ccw/tcw in cqr so it can be started on a base device. 34298e09f215SStefan Weinhuber * 34308e09f215SStefan Weinhuber * Note that this is not enough to restart the cqr! 34318e09f215SStefan Weinhuber * Either reset cqr->startdev as well (summary unit check handling) 34328e09f215SStefan Weinhuber * or restart via separate cqr (as in ERP handling). 34338e09f215SStefan Weinhuber */ 34348e09f215SStefan Weinhuber void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 34358e09f215SStefan Weinhuber { 34368e09f215SStefan Weinhuber struct ccw1 *ccw; 34378e09f215SStefan Weinhuber struct PFX_eckd_data *pfxdata; 3438f3eb5384SStefan Weinhuber struct tcw *tcw; 3439f3eb5384SStefan Weinhuber struct tccb *tccb; 3440f3eb5384SStefan Weinhuber struct dcw *dcw; 34418e09f215SStefan Weinhuber 3442f3eb5384SStefan Weinhuber if (cqr->cpmode == 1) { 3443f3eb5384SStefan Weinhuber tcw = cqr->cpaddr; 3444f3eb5384SStefan Weinhuber tccb = tcw_get_tccb(tcw); 3445f3eb5384SStefan Weinhuber dcw = (struct dcw *)&tccb->tca[0]; 3446f3eb5384SStefan Weinhuber pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; 3447f3eb5384SStefan Weinhuber pfxdata->validity.verify_base = 0; 3448f3eb5384SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 3449f3eb5384SStefan Weinhuber } else { 34508e09f215SStefan Weinhuber ccw = cqr->cpaddr; 34518e09f215SStefan Weinhuber pfxdata = cqr->data; 34528e09f215SStefan Weinhuber if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 34538e09f215SStefan Weinhuber pfxdata->validity.verify_base = 0; 34548e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 34558e09f215SStefan Weinhuber } 34568e09f215SStefan Weinhuber } 3457f3eb5384SStefan Weinhuber } 34588e09f215SStefan Weinhuber 34598e09f215SStefan Weinhuber #define DASD_ECKD_CHANQ_MAX_SIZE 4 34608e09f215SStefan Weinhuber 34618e09f215SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 34628e09f215SStefan Weinhuber struct dasd_block *block, 34638e09f215SStefan Weinhuber struct request *req) 34648e09f215SStefan Weinhuber { 34658e09f215SStefan Weinhuber struct dasd_eckd_private *private; 34668e09f215SStefan Weinhuber struct dasd_device *startdev; 34678e09f215SStefan Weinhuber unsigned long flags; 34688e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 34698e09f215SStefan Weinhuber 34708e09f215SStefan Weinhuber startdev = dasd_alias_get_start_dev(base); 34718e09f215SStefan Weinhuber if (!startdev) 34728e09f215SStefan Weinhuber startdev = base; 34738e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) startdev->private; 34748e09f215SStefan Weinhuber if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 34758e09f215SStefan Weinhuber return ERR_PTR(-EBUSY); 34768e09f215SStefan Weinhuber 34778e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 34788e09f215SStefan Weinhuber private->count++; 3479e4dbb0f2SStefan Haberland if ((base->features & DASD_FEATURE_USERAW)) 3480e4dbb0f2SStefan Haberland cqr = dasd_raw_build_cp(startdev, block, req); 3481e4dbb0f2SStefan Haberland else 34828e09f215SStefan Weinhuber cqr = dasd_eckd_build_cp(startdev, block, req); 34838e09f215SStefan Weinhuber if (IS_ERR(cqr)) 34848e09f215SStefan Weinhuber private->count--; 34858e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 34868e09f215SStefan Weinhuber return cqr; 34878e09f215SStefan Weinhuber } 34888e09f215SStefan Weinhuber 34898e09f215SStefan Weinhuber static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 34908e09f215SStefan Weinhuber struct request *req) 34918e09f215SStefan Weinhuber { 34928e09f215SStefan Weinhuber struct dasd_eckd_private *private; 34938e09f215SStefan Weinhuber unsigned long flags; 34948e09f215SStefan Weinhuber 34958e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 34968e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) cqr->memdev->private; 34978e09f215SStefan Weinhuber private->count--; 34988e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 34998e09f215SStefan Weinhuber return dasd_eckd_free_cp(cqr, req); 35008e09f215SStefan Weinhuber } 35018e09f215SStefan Weinhuber 35021da177e4SLinus Torvalds static int 35031da177e4SLinus Torvalds dasd_eckd_fill_info(struct dasd_device * device, 35041da177e4SLinus Torvalds struct dasd_information2_t * info) 35051da177e4SLinus Torvalds { 35061da177e4SLinus Torvalds struct dasd_eckd_private *private; 35071da177e4SLinus Torvalds 35081da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 35091da177e4SLinus Torvalds info->label_block = 2; 35101da177e4SLinus Torvalds info->FBA_layout = private->uses_cdl ? 0 : 1; 35111da177e4SLinus Torvalds info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 35121da177e4SLinus Torvalds info->characteristics_size = sizeof(struct dasd_eckd_characteristics); 35131da177e4SLinus Torvalds memcpy(info->characteristics, &private->rdc_data, 35141da177e4SLinus Torvalds sizeof(struct dasd_eckd_characteristics)); 35154abb08c2SStefan Weinhuber info->confdata_size = min((unsigned long)private->conf_len, 35164abb08c2SStefan Weinhuber sizeof(info->configuration_data)); 35174abb08c2SStefan Weinhuber memcpy(info->configuration_data, private->conf_data, 35184abb08c2SStefan Weinhuber info->confdata_size); 35191da177e4SLinus Torvalds return 0; 35201da177e4SLinus Torvalds } 35211da177e4SLinus Torvalds 35221da177e4SLinus Torvalds /* 35231da177e4SLinus Torvalds * SECTION: ioctl functions for eckd devices. 35241da177e4SLinus Torvalds */ 35251da177e4SLinus Torvalds 35261da177e4SLinus Torvalds /* 35271da177e4SLinus Torvalds * Release device ioctl. 35281da177e4SLinus Torvalds * Buils a channel programm to releases a prior reserved 35291da177e4SLinus Torvalds * (see dasd_eckd_reserve) device. 35301da177e4SLinus Torvalds */ 35311da177e4SLinus Torvalds static int 35321107ccfbSChristoph Hellwig dasd_eckd_release(struct dasd_device *device) 35331da177e4SLinus Torvalds { 35341da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 35351da177e4SLinus Torvalds int rc; 3536f3eb5384SStefan Weinhuber struct ccw1 *ccw; 3537f932bceaSStefan Weinhuber int useglobal; 35381da177e4SLinus Torvalds 35391da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 35401da177e4SLinus Torvalds return -EACCES; 35411da177e4SLinus Torvalds 3542f932bceaSStefan Weinhuber useglobal = 0; 354368b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 35441da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3545f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3546f932bceaSStefan Weinhuber useglobal = 1; 3547f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3548f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3549f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3550f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3551f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3552f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3553f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 35541da177e4SLinus Torvalds } 3555f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 3556f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RELEASE; 3557f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3558f3eb5384SStefan Weinhuber ccw->count = 32; 3559f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 35608e09f215SStefan Weinhuber cqr->startdev = device; 35618e09f215SStefan Weinhuber cqr->memdev = device; 35621da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 35631c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3564336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 35651da177e4SLinus Torvalds cqr->expires = 2 * HZ; 35661aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 35671da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 35681da177e4SLinus Torvalds 35691da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 35705a27e60dSStefan Weinhuber if (!rc) 35715a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 35721da177e4SLinus Torvalds 3573f932bceaSStefan Weinhuber if (useglobal) 3574f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3575f932bceaSStefan Weinhuber else 35768e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 35771da177e4SLinus Torvalds return rc; 35781da177e4SLinus Torvalds } 35791da177e4SLinus Torvalds 35801da177e4SLinus Torvalds /* 35811da177e4SLinus Torvalds * Reserve device ioctl. 35821da177e4SLinus Torvalds * Options are set to 'synchronous wait for interrupt' and 35831da177e4SLinus Torvalds * 'timeout the request'. This leads to a terminate IO if 35841da177e4SLinus Torvalds * the interrupt is outstanding for a certain time. 35851da177e4SLinus Torvalds */ 35861da177e4SLinus Torvalds static int 35871107ccfbSChristoph Hellwig dasd_eckd_reserve(struct dasd_device *device) 35881da177e4SLinus Torvalds { 35891da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 35901da177e4SLinus Torvalds int rc; 3591f3eb5384SStefan Weinhuber struct ccw1 *ccw; 3592f932bceaSStefan Weinhuber int useglobal; 35931da177e4SLinus Torvalds 35941da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 35951da177e4SLinus Torvalds return -EACCES; 35961da177e4SLinus Torvalds 3597f932bceaSStefan Weinhuber useglobal = 0; 359868b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 35991da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3600f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3601f932bceaSStefan Weinhuber useglobal = 1; 3602f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3603f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3604f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3605f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3606f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3607f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3608f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 36091da177e4SLinus Torvalds } 3610f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 3611f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RESERVE; 3612f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3613f3eb5384SStefan Weinhuber ccw->count = 32; 3614f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 36158e09f215SStefan Weinhuber cqr->startdev = device; 36168e09f215SStefan Weinhuber cqr->memdev = device; 36171da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 36181c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3619336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 36201da177e4SLinus Torvalds cqr->expires = 2 * HZ; 36211aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 36221da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 36231da177e4SLinus Torvalds 36241da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 36255a27e60dSStefan Weinhuber if (!rc) 36265a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 36271da177e4SLinus Torvalds 3628f932bceaSStefan Weinhuber if (useglobal) 3629f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3630f932bceaSStefan Weinhuber else 36318e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 36321da177e4SLinus Torvalds return rc; 36331da177e4SLinus Torvalds } 36341da177e4SLinus Torvalds 36351da177e4SLinus Torvalds /* 36361da177e4SLinus Torvalds * Steal lock ioctl - unconditional reserve device. 36371da177e4SLinus Torvalds * Buils a channel programm to break a device's reservation. 36381da177e4SLinus Torvalds * (unconditional reserve) 36391da177e4SLinus Torvalds */ 36401da177e4SLinus Torvalds static int 36411107ccfbSChristoph Hellwig dasd_eckd_steal_lock(struct dasd_device *device) 36421da177e4SLinus Torvalds { 36431da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 36441da177e4SLinus Torvalds int rc; 3645f3eb5384SStefan Weinhuber struct ccw1 *ccw; 3646f932bceaSStefan Weinhuber int useglobal; 36471da177e4SLinus Torvalds 36481da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 36491da177e4SLinus Torvalds return -EACCES; 36501da177e4SLinus Torvalds 3651f932bceaSStefan Weinhuber useglobal = 0; 365268b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 36531da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3654f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3655f932bceaSStefan Weinhuber useglobal = 1; 3656f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3657f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3658f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3659f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3660f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3661f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3662f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 36631da177e4SLinus Torvalds } 3664f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 3665f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SLCK; 3666f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3667f3eb5384SStefan Weinhuber ccw->count = 32; 3668f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 36698e09f215SStefan Weinhuber cqr->startdev = device; 36708e09f215SStefan Weinhuber cqr->memdev = device; 36711da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 36721c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3673336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 36741da177e4SLinus Torvalds cqr->expires = 2 * HZ; 36751aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 36761da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 36771da177e4SLinus Torvalds 36781da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 36795a27e60dSStefan Weinhuber if (!rc) 36805a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 36811da177e4SLinus Torvalds 3682f932bceaSStefan Weinhuber if (useglobal) 3683f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3684f932bceaSStefan Weinhuber else 36858e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 36861da177e4SLinus Torvalds return rc; 36871da177e4SLinus Torvalds } 36881da177e4SLinus Torvalds 36891da177e4SLinus Torvalds /* 3690196339f1SStefan Weinhuber * SNID - Sense Path Group ID 3691196339f1SStefan Weinhuber * This ioctl may be used in situations where I/O is stalled due to 3692196339f1SStefan Weinhuber * a reserve, so if the normal dasd_smalloc_request fails, we use the 3693196339f1SStefan Weinhuber * preallocated dasd_reserve_req. 3694196339f1SStefan Weinhuber */ 3695196339f1SStefan Weinhuber static int dasd_eckd_snid(struct dasd_device *device, 3696196339f1SStefan Weinhuber void __user *argp) 3697196339f1SStefan Weinhuber { 3698196339f1SStefan Weinhuber struct dasd_ccw_req *cqr; 3699196339f1SStefan Weinhuber int rc; 3700196339f1SStefan Weinhuber struct ccw1 *ccw; 3701196339f1SStefan Weinhuber int useglobal; 3702196339f1SStefan Weinhuber struct dasd_snid_ioctl_data usrparm; 3703196339f1SStefan Weinhuber 3704196339f1SStefan Weinhuber if (!capable(CAP_SYS_ADMIN)) 3705196339f1SStefan Weinhuber return -EACCES; 3706196339f1SStefan Weinhuber 3707196339f1SStefan Weinhuber if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 3708196339f1SStefan Weinhuber return -EFAULT; 3709196339f1SStefan Weinhuber 3710196339f1SStefan Weinhuber useglobal = 0; 3711196339f1SStefan Weinhuber cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 3712196339f1SStefan Weinhuber sizeof(struct dasd_snid_data), device); 3713196339f1SStefan Weinhuber if (IS_ERR(cqr)) { 3714196339f1SStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3715196339f1SStefan Weinhuber useglobal = 1; 3716196339f1SStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3717196339f1SStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3718196339f1SStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3719196339f1SStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3720196339f1SStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3721196339f1SStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3722196339f1SStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 3723196339f1SStefan Weinhuber } 3724196339f1SStefan Weinhuber ccw = cqr->cpaddr; 3725196339f1SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SNID; 3726196339f1SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3727196339f1SStefan Weinhuber ccw->count = 12; 3728196339f1SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 3729196339f1SStefan Weinhuber cqr->startdev = device; 3730196339f1SStefan Weinhuber cqr->memdev = device; 3731196339f1SStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3732196339f1SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 37335a27e60dSStefan Weinhuber set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 3734196339f1SStefan Weinhuber cqr->retries = 5; 3735196339f1SStefan Weinhuber cqr->expires = 10 * HZ; 37361aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 3737196339f1SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 3738196339f1SStefan Weinhuber cqr->lpm = usrparm.path_mask; 3739196339f1SStefan Weinhuber 3740196339f1SStefan Weinhuber rc = dasd_sleep_on_immediatly(cqr); 3741196339f1SStefan Weinhuber /* verify that I/O processing didn't modify the path mask */ 3742196339f1SStefan Weinhuber if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) 3743196339f1SStefan Weinhuber rc = -EIO; 3744196339f1SStefan Weinhuber if (!rc) { 3745196339f1SStefan Weinhuber usrparm.data = *((struct dasd_snid_data *)cqr->data); 3746196339f1SStefan Weinhuber if (copy_to_user(argp, &usrparm, sizeof(usrparm))) 3747196339f1SStefan Weinhuber rc = -EFAULT; 3748196339f1SStefan Weinhuber } 3749196339f1SStefan Weinhuber 3750196339f1SStefan Weinhuber if (useglobal) 3751196339f1SStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3752196339f1SStefan Weinhuber else 3753196339f1SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 3754196339f1SStefan Weinhuber return rc; 3755196339f1SStefan Weinhuber } 3756196339f1SStefan Weinhuber 3757196339f1SStefan Weinhuber /* 37581da177e4SLinus Torvalds * Read performance statistics 37591da177e4SLinus Torvalds */ 37601da177e4SLinus Torvalds static int 37611107ccfbSChristoph Hellwig dasd_eckd_performance(struct dasd_device *device, void __user *argp) 37621da177e4SLinus Torvalds { 37631da177e4SLinus Torvalds struct dasd_psf_prssd_data *prssdp; 37641da177e4SLinus Torvalds struct dasd_rssd_perf_stats_t *stats; 37651da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 37661da177e4SLinus Torvalds struct ccw1 *ccw; 37671da177e4SLinus Torvalds int rc; 37681da177e4SLinus Torvalds 376968b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 37701da177e4SLinus Torvalds (sizeof(struct dasd_psf_prssd_data) + 37711da177e4SLinus Torvalds sizeof(struct dasd_rssd_perf_stats_t)), 37721da177e4SLinus Torvalds device); 37731da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3774fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 37751da177e4SLinus Torvalds "Could not allocate initialization request"); 37761da177e4SLinus Torvalds return PTR_ERR(cqr); 37771da177e4SLinus Torvalds } 37788e09f215SStefan Weinhuber cqr->startdev = device; 37798e09f215SStefan Weinhuber cqr->memdev = device; 37801da177e4SLinus Torvalds cqr->retries = 0; 3781eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 37821da177e4SLinus Torvalds cqr->expires = 10 * HZ; 37831da177e4SLinus Torvalds 37841da177e4SLinus Torvalds /* Prepare for Read Subsystem Data */ 37851da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 37861da177e4SLinus Torvalds memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 37871da177e4SLinus Torvalds prssdp->order = PSF_ORDER_PRSSD; 37885d67d164SJoe Perches prssdp->suborder = 0x01; /* Performance Statistics */ 37891da177e4SLinus Torvalds prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 37901da177e4SLinus Torvalds 37911da177e4SLinus Torvalds ccw = cqr->cpaddr; 37921da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_PSF; 37931da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_psf_prssd_data); 37941da177e4SLinus Torvalds ccw->flags |= CCW_FLAG_CC; 37951da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) prssdp; 37961da177e4SLinus Torvalds 37971da177e4SLinus Torvalds /* Read Subsystem Data - Performance Statistics */ 37981da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 37991da177e4SLinus Torvalds memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 38001da177e4SLinus Torvalds 38011da177e4SLinus Torvalds ccw++; 38021da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_RSSD; 38031da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 38041da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) stats; 38051da177e4SLinus Torvalds 38061aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 38071da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 38081da177e4SLinus Torvalds rc = dasd_sleep_on(cqr); 38091da177e4SLinus Torvalds if (rc == 0) { 38101da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 38111da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 38121107ccfbSChristoph Hellwig if (copy_to_user(argp, stats, 38131107ccfbSChristoph Hellwig sizeof(struct dasd_rssd_perf_stats_t))) 38141107ccfbSChristoph Hellwig rc = -EFAULT; 38151da177e4SLinus Torvalds } 38168e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 38171da177e4SLinus Torvalds return rc; 38181da177e4SLinus Torvalds } 38191da177e4SLinus Torvalds 38201da177e4SLinus Torvalds /* 38211da177e4SLinus Torvalds * Get attributes (cache operations) 38221da177e4SLinus Torvalds * Returnes the cache attributes used in Define Extend (DE). 38231da177e4SLinus Torvalds */ 38241da177e4SLinus Torvalds static int 38251107ccfbSChristoph Hellwig dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 38261da177e4SLinus Torvalds { 38271107ccfbSChristoph Hellwig struct dasd_eckd_private *private = 38281107ccfbSChristoph Hellwig (struct dasd_eckd_private *)device->private; 38291107ccfbSChristoph Hellwig struct attrib_data_t attrib = private->attrib; 38301da177e4SLinus Torvalds int rc; 38311da177e4SLinus Torvalds 38321da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 38331da177e4SLinus Torvalds return -EACCES; 38341107ccfbSChristoph Hellwig if (!argp) 38351da177e4SLinus Torvalds return -EINVAL; 38361da177e4SLinus Torvalds 38371107ccfbSChristoph Hellwig rc = 0; 38381107ccfbSChristoph Hellwig if (copy_to_user(argp, (long *) &attrib, 38391107ccfbSChristoph Hellwig sizeof(struct attrib_data_t))) 38401107ccfbSChristoph Hellwig rc = -EFAULT; 38411da177e4SLinus Torvalds 38421da177e4SLinus Torvalds return rc; 38431da177e4SLinus Torvalds } 38441da177e4SLinus Torvalds 38451da177e4SLinus Torvalds /* 38461da177e4SLinus Torvalds * Set attributes (cache operations) 38471da177e4SLinus Torvalds * Stores the attributes for cache operation to be used in Define Extend (DE). 38481da177e4SLinus Torvalds */ 38491da177e4SLinus Torvalds static int 38501107ccfbSChristoph Hellwig dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 38511da177e4SLinus Torvalds { 38521107ccfbSChristoph Hellwig struct dasd_eckd_private *private = 38531107ccfbSChristoph Hellwig (struct dasd_eckd_private *)device->private; 38541da177e4SLinus Torvalds struct attrib_data_t attrib; 38551da177e4SLinus Torvalds 38561da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 38571da177e4SLinus Torvalds return -EACCES; 38581107ccfbSChristoph Hellwig if (!argp) 38591da177e4SLinus Torvalds return -EINVAL; 38601da177e4SLinus Torvalds 38611107ccfbSChristoph Hellwig if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 38621da177e4SLinus Torvalds return -EFAULT; 38631da177e4SLinus Torvalds private->attrib = attrib; 38641da177e4SLinus Torvalds 3865fc19f381SStefan Haberland dev_info(&device->cdev->dev, 3866fc19f381SStefan Haberland "The DASD cache mode was set to %x (%i cylinder prestage)\n", 38671da177e4SLinus Torvalds private->attrib.operation, private->attrib.nr_cyl); 38681da177e4SLinus Torvalds return 0; 38691da177e4SLinus Torvalds } 38701da177e4SLinus Torvalds 3871ab1d848fSNigel Hislop /* 3872ab1d848fSNigel Hislop * Issue syscall I/O to EMC Symmetrix array. 3873ab1d848fSNigel Hislop * CCWs are PSF and RSSD 3874ab1d848fSNigel Hislop */ 3875ab1d848fSNigel Hislop static int dasd_symm_io(struct dasd_device *device, void __user *argp) 3876ab1d848fSNigel Hislop { 3877ab1d848fSNigel Hislop struct dasd_symmio_parms usrparm; 3878ab1d848fSNigel Hislop char *psf_data, *rssd_result; 3879ab1d848fSNigel Hislop struct dasd_ccw_req *cqr; 3880ab1d848fSNigel Hislop struct ccw1 *ccw; 388152898025SNigel Hislop char psf0, psf1; 3882ab1d848fSNigel Hislop int rc; 3883ab1d848fSNigel Hislop 388452898025SNigel Hislop if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) 388552898025SNigel Hislop return -EACCES; 388652898025SNigel Hislop psf0 = psf1 = 0; 388752898025SNigel Hislop 3888ab1d848fSNigel Hislop /* Copy parms from caller */ 3889ab1d848fSNigel Hislop rc = -EFAULT; 3890ab1d848fSNigel Hislop if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 3891ab1d848fSNigel Hislop goto out; 3892f8b06859SHeiko Carstens if (is_compat_task() || sizeof(long) == 4) { 3893ab1d848fSNigel Hislop /* Make sure pointers are sane even on 31 bit. */ 3894ab1d848fSNigel Hislop rc = -EINVAL; 3895f8b06859SHeiko Carstens if ((usrparm.psf_data >> 32) != 0) 3896ab1d848fSNigel Hislop goto out; 3897f8b06859SHeiko Carstens if ((usrparm.rssd_result >> 32) != 0) 3898f8b06859SHeiko Carstens goto out; 3899f8b06859SHeiko Carstens usrparm.psf_data &= 0x7fffffffULL; 3900f8b06859SHeiko Carstens usrparm.rssd_result &= 0x7fffffffULL; 3901ab1d848fSNigel Hislop } 3902ab1d848fSNigel Hislop /* alloc I/O data area */ 3903ab1d848fSNigel Hislop psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 3904ab1d848fSNigel Hislop rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 3905ab1d848fSNigel Hislop if (!psf_data || !rssd_result) { 3906ab1d848fSNigel Hislop rc = -ENOMEM; 3907ab1d848fSNigel Hislop goto out_free; 3908ab1d848fSNigel Hislop } 3909ab1d848fSNigel Hislop 3910ab1d848fSNigel Hislop /* get syscall header from user space */ 3911ab1d848fSNigel Hislop rc = -EFAULT; 3912ab1d848fSNigel Hislop if (copy_from_user(psf_data, 3913ab1d848fSNigel Hislop (void __user *)(unsigned long) usrparm.psf_data, 3914ab1d848fSNigel Hislop usrparm.psf_data_len)) 3915ab1d848fSNigel Hislop goto out_free; 391652898025SNigel Hislop psf0 = psf_data[0]; 391752898025SNigel Hislop psf1 = psf_data[1]; 3918ab1d848fSNigel Hislop 3919ab1d848fSNigel Hislop /* setup CCWs for PSF + RSSD */ 392068b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device); 3921ab1d848fSNigel Hislop if (IS_ERR(cqr)) { 3922fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3923ab1d848fSNigel Hislop "Could not allocate initialization request"); 3924ab1d848fSNigel Hislop rc = PTR_ERR(cqr); 3925ab1d848fSNigel Hislop goto out_free; 3926ab1d848fSNigel Hislop } 3927ab1d848fSNigel Hislop 3928ab1d848fSNigel Hislop cqr->startdev = device; 3929ab1d848fSNigel Hislop cqr->memdev = device; 3930ab1d848fSNigel Hislop cqr->retries = 3; 3931ab1d848fSNigel Hislop cqr->expires = 10 * HZ; 39321aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 3933ab1d848fSNigel Hislop cqr->status = DASD_CQR_FILLED; 3934ab1d848fSNigel Hislop 3935ab1d848fSNigel Hislop /* Build the ccws */ 3936ab1d848fSNigel Hislop ccw = cqr->cpaddr; 3937ab1d848fSNigel Hislop 3938ab1d848fSNigel Hislop /* PSF ccw */ 3939ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_PSF; 3940ab1d848fSNigel Hislop ccw->count = usrparm.psf_data_len; 3941ab1d848fSNigel Hislop ccw->flags |= CCW_FLAG_CC; 3942ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) psf_data; 3943ab1d848fSNigel Hislop 3944ab1d848fSNigel Hislop ccw++; 3945ab1d848fSNigel Hislop 3946ab1d848fSNigel Hislop /* RSSD ccw */ 3947ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_RSSD; 3948ab1d848fSNigel Hislop ccw->count = usrparm.rssd_result_len; 3949ab1d848fSNigel Hislop ccw->flags = CCW_FLAG_SLI ; 3950ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) rssd_result; 3951ab1d848fSNigel Hislop 3952ab1d848fSNigel Hislop rc = dasd_sleep_on(cqr); 3953ab1d848fSNigel Hislop if (rc) 3954ab1d848fSNigel Hislop goto out_sfree; 3955ab1d848fSNigel Hislop 3956ab1d848fSNigel Hislop rc = -EFAULT; 3957ab1d848fSNigel Hislop if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 3958ab1d848fSNigel Hislop rssd_result, usrparm.rssd_result_len)) 3959ab1d848fSNigel Hislop goto out_sfree; 3960ab1d848fSNigel Hislop rc = 0; 3961ab1d848fSNigel Hislop 3962ab1d848fSNigel Hislop out_sfree: 3963ab1d848fSNigel Hislop dasd_sfree_request(cqr, cqr->memdev); 3964ab1d848fSNigel Hislop out_free: 3965ab1d848fSNigel Hislop kfree(rssd_result); 3966ab1d848fSNigel Hislop kfree(psf_data); 3967ab1d848fSNigel Hislop out: 396852898025SNigel Hislop DBF_DEV_EVENT(DBF_WARNING, device, 396952898025SNigel Hislop "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", 397052898025SNigel Hislop (int) psf0, (int) psf1, rc); 3971ab1d848fSNigel Hislop return rc; 3972ab1d848fSNigel Hislop } 3973ab1d848fSNigel Hislop 39741107ccfbSChristoph Hellwig static int 39758e09f215SStefan Weinhuber dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 39761107ccfbSChristoph Hellwig { 39778e09f215SStefan Weinhuber struct dasd_device *device = block->base; 39788e09f215SStefan Weinhuber 39791107ccfbSChristoph Hellwig switch (cmd) { 39801107ccfbSChristoph Hellwig case BIODASDGATTR: 39811107ccfbSChristoph Hellwig return dasd_eckd_get_attrib(device, argp); 39821107ccfbSChristoph Hellwig case BIODASDSATTR: 39831107ccfbSChristoph Hellwig return dasd_eckd_set_attrib(device, argp); 39841107ccfbSChristoph Hellwig case BIODASDPSRD: 39851107ccfbSChristoph Hellwig return dasd_eckd_performance(device, argp); 39861107ccfbSChristoph Hellwig case BIODASDRLSE: 39871107ccfbSChristoph Hellwig return dasd_eckd_release(device); 39881107ccfbSChristoph Hellwig case BIODASDRSRV: 39891107ccfbSChristoph Hellwig return dasd_eckd_reserve(device); 39901107ccfbSChristoph Hellwig case BIODASDSLCK: 39911107ccfbSChristoph Hellwig return dasd_eckd_steal_lock(device); 3992196339f1SStefan Weinhuber case BIODASDSNID: 3993196339f1SStefan Weinhuber return dasd_eckd_snid(device, argp); 3994ab1d848fSNigel Hislop case BIODASDSYMMIO: 3995ab1d848fSNigel Hislop return dasd_symm_io(device, argp); 39961107ccfbSChristoph Hellwig default: 39976b79d14eSHeiko Carstens return -ENOTTY; 39981107ccfbSChristoph Hellwig } 39991107ccfbSChristoph Hellwig } 40001107ccfbSChristoph Hellwig 40011da177e4SLinus Torvalds /* 4002445b5b49SHorst Hummel * Dump the range of CCWs into 'page' buffer 4003445b5b49SHorst Hummel * and return number of printed chars. 4004445b5b49SHorst Hummel */ 40054d284cacSHeiko Carstens static int 4006445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 4007445b5b49SHorst Hummel { 4008445b5b49SHorst Hummel int len, count; 4009445b5b49SHorst Hummel char *datap; 4010445b5b49SHorst Hummel 4011445b5b49SHorst Hummel len = 0; 4012445b5b49SHorst Hummel while (from <= to) { 4013773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4014445b5b49SHorst Hummel " CCW %p: %08X %08X DAT:", 4015445b5b49SHorst Hummel from, ((int *) from)[0], ((int *) from)[1]); 4016445b5b49SHorst Hummel 4017445b5b49SHorst Hummel /* get pointer to data (consider IDALs) */ 4018445b5b49SHorst Hummel if (from->flags & CCW_FLAG_IDA) 4019445b5b49SHorst Hummel datap = (char *) *((addr_t *) (addr_t) from->cda); 4020445b5b49SHorst Hummel else 4021445b5b49SHorst Hummel datap = (char *) ((addr_t) from->cda); 4022445b5b49SHorst Hummel 4023445b5b49SHorst Hummel /* dump data (max 32 bytes) */ 4024445b5b49SHorst Hummel for (count = 0; count < from->count && count < 32; count++) { 4025445b5b49SHorst Hummel if (count % 8 == 0) len += sprintf(page + len, " "); 4026445b5b49SHorst Hummel if (count % 4 == 0) len += sprintf(page + len, " "); 4027445b5b49SHorst Hummel len += sprintf(page + len, "%02x", datap[count]); 4028445b5b49SHorst Hummel } 4029445b5b49SHorst Hummel len += sprintf(page + len, "\n"); 4030445b5b49SHorst Hummel from++; 4031445b5b49SHorst Hummel } 4032445b5b49SHorst Hummel return len; 4033445b5b49SHorst Hummel } 4034445b5b49SHorst Hummel 4035fc19f381SStefan Haberland static void 4036aeec92caSStefan Haberland dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 4037aeec92caSStefan Haberland char *reason) 4038fc19f381SStefan Haberland { 4039fc19f381SStefan Haberland u64 *sense; 4040a5a0061fSStefan Weinhuber u64 *stat; 4041fc19f381SStefan Haberland 4042aeec92caSStefan Haberland sense = (u64 *) dasd_get_sense(irb); 4043a5a0061fSStefan Weinhuber stat = (u64 *) &irb->scsw; 4044fc19f381SStefan Haberland if (sense) { 4045a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " 4046a5a0061fSStefan Weinhuber "%016llx %016llx %016llx %016llx", 4047a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 4048ed3640b2SStefan Haberland sense[0], sense[1], sense[2], sense[3]); 4049fc19f381SStefan Haberland } else { 4050a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", 4051a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 4052a5a0061fSStefan Weinhuber "NO VALID SENSE"); 4053fc19f381SStefan Haberland } 4054fc19f381SStefan Haberland } 4055fc19f381SStefan Haberland 4056445b5b49SHorst Hummel /* 40571da177e4SLinus Torvalds * Print sense data and related channel program. 40581da177e4SLinus Torvalds * Parts are printed because printk buffer is only 1024 bytes. 40591da177e4SLinus Torvalds */ 4060f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 40618e09f215SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 40621da177e4SLinus Torvalds { 40631da177e4SLinus Torvalds char *page; 4064445b5b49SHorst Hummel struct ccw1 *first, *last, *fail, *from, *to; 4065445b5b49SHorst Hummel int len, sl, sct; 40661da177e4SLinus Torvalds 40671da177e4SLinus Torvalds page = (char *) get_zeroed_page(GFP_ATOMIC); 40681da177e4SLinus Torvalds if (page == NULL) { 4069fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 4070fc19f381SStefan Haberland "No memory to dump sense data\n"); 40711da177e4SLinus Torvalds return; 40721da177e4SLinus Torvalds } 4073445b5b49SHorst Hummel /* dump the sense data */ 4074773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 40751da177e4SLinus Torvalds " I/O status report for device %s:\n", 40762a0217d5SKay Sievers dev_name(&device->cdev->dev)); 4077773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4078a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 4079a5a0061fSStefan Weinhuber "CS:%02X RC:%d\n", 4080a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 4081a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 4082a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 4083a5a0061fSStefan Weinhuber req ? req->intrc : 0); 4084773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 40851da177e4SLinus Torvalds " device %s: Failing CCW: %p\n", 40862a0217d5SKay Sievers dev_name(&device->cdev->dev), 408723d805b6SPeter Oberparleiter (void *) (addr_t) irb->scsw.cmd.cpa); 40881da177e4SLinus Torvalds if (irb->esw.esw0.erw.cons) { 40891da177e4SLinus Torvalds for (sl = 0; sl < 4; sl++) { 4090773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 40911da177e4SLinus Torvalds " Sense(hex) %2d-%2d:", 40921da177e4SLinus Torvalds (8 * sl), ((8 * sl) + 7)); 40931da177e4SLinus Torvalds 40941da177e4SLinus Torvalds for (sct = 0; sct < 8; sct++) { 40951da177e4SLinus Torvalds len += sprintf(page + len, " %02x", 40961da177e4SLinus Torvalds irb->ecw[8 * sl + sct]); 40971da177e4SLinus Torvalds } 40981da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 40991da177e4SLinus Torvalds } 41001da177e4SLinus Torvalds 41011da177e4SLinus Torvalds if (irb->ecw[27] & DASD_SENSE_BIT_0) { 41021da177e4SLinus Torvalds /* 24 Byte Sense Data */ 4103773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 41041da177e4SLinus Torvalds " 24 Byte: %x MSG %x, " 41051da177e4SLinus Torvalds "%s MSGb to SYSOP\n", 41061da177e4SLinus Torvalds irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 41071da177e4SLinus Torvalds irb->ecw[1] & 0x10 ? "" : "no"); 41081da177e4SLinus Torvalds } else { 41091da177e4SLinus Torvalds /* 32 Byte Sense Data */ 4110773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 41111da177e4SLinus Torvalds " 32 Byte: Format: %x " 41121da177e4SLinus Torvalds "Exception class %x\n", 41131da177e4SLinus Torvalds irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 41141da177e4SLinus Torvalds } 41151da177e4SLinus Torvalds } else { 4116773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 41171da177e4SLinus Torvalds " SORRY - NO VALID SENSE AVAILABLE\n"); 41181da177e4SLinus Torvalds } 4119773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 41201da177e4SLinus Torvalds 41218e09f215SStefan Weinhuber if (req) { 41228e09f215SStefan Weinhuber /* req == NULL for unsolicited interrupts */ 4123445b5b49SHorst Hummel /* dump the Channel Program (max 140 Bytes per line) */ 4124445b5b49SHorst Hummel /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 4125445b5b49SHorst Hummel first = req->cpaddr; 4126445b5b49SHorst Hummel for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 4127445b5b49SHorst Hummel to = min(first + 6, last); 4128773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 41291da177e4SLinus Torvalds " Related CP in req: %p\n", req); 4130445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(first, to, page + len); 4131773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 41321da177e4SLinus Torvalds 4133445b5b49SHorst Hummel /* print failing CCW area (maximum 4) */ 4134445b5b49SHorst Hummel /* scsw->cda is either valid or zero */ 41351da177e4SLinus Torvalds len = 0; 4136445b5b49SHorst Hummel from = ++to; 413723d805b6SPeter Oberparleiter fail = (struct ccw1 *)(addr_t) 413823d805b6SPeter Oberparleiter irb->scsw.cmd.cpa; /* failing CCW */ 4139445b5b49SHorst Hummel if (from < fail - 2) { 4140445b5b49SHorst Hummel from = fail - 2; /* there is a gap - print header */ 4141773bab4aSSebastian Ott len += sprintf(page, PRINTK_HEADER "......\n"); 41421da177e4SLinus Torvalds } 4143445b5b49SHorst Hummel to = min(fail + 1, last); 4144445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, to, page + len); 41451da177e4SLinus Torvalds 4146445b5b49SHorst Hummel /* print last CCWs (maximum 2) */ 4147445b5b49SHorst Hummel from = max(from, ++to); 4148445b5b49SHorst Hummel if (from < last - 1) { 4149445b5b49SHorst Hummel from = last - 1; /* there is a gap - print header */ 4150773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER "......\n"); 41511da177e4SLinus Torvalds } 4152445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, last, page + len); 41531da177e4SLinus Torvalds if (len > 0) 4154773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 41558e09f215SStefan Weinhuber } 41561da177e4SLinus Torvalds free_page((unsigned long) page); 41571da177e4SLinus Torvalds } 41581da177e4SLinus Torvalds 4159f3eb5384SStefan Weinhuber 4160f3eb5384SStefan Weinhuber /* 4161f3eb5384SStefan Weinhuber * Print sense data from a tcw. 4162f3eb5384SStefan Weinhuber */ 4163f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 4164f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 4165f3eb5384SStefan Weinhuber { 4166f3eb5384SStefan Weinhuber char *page; 4167f3eb5384SStefan Weinhuber int len, sl, sct, residual; 4168f3eb5384SStefan Weinhuber struct tsb *tsb; 4169ef19298bSStefan Weinhuber u8 *sense, *rcq; 4170f3eb5384SStefan Weinhuber 4171f3eb5384SStefan Weinhuber page = (char *) get_zeroed_page(GFP_ATOMIC); 4172f3eb5384SStefan Weinhuber if (page == NULL) { 4173fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, " %s", 4174f3eb5384SStefan Weinhuber "No memory to dump sense data"); 4175f3eb5384SStefan Weinhuber return; 4176f3eb5384SStefan Weinhuber } 4177f3eb5384SStefan Weinhuber /* dump the sense data */ 4178773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 4179f3eb5384SStefan Weinhuber " I/O status report for device %s:\n", 4180f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev)); 4181773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4182a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 4183a5a0061fSStefan Weinhuber "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", 4184a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 4185a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 4186a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 4187a5a0061fSStefan Weinhuber irb->scsw.tm.fcxs, irb->scsw.tm.schxs, 4188a5a0061fSStefan Weinhuber req ? req->intrc : 0); 4189773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4190f3eb5384SStefan Weinhuber " device %s: Failing TCW: %p\n", 4191f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev), 4192f3eb5384SStefan Weinhuber (void *) (addr_t) irb->scsw.tm.tcw); 4193f3eb5384SStefan Weinhuber 4194f3eb5384SStefan Weinhuber tsb = NULL; 4195f3eb5384SStefan Weinhuber sense = NULL; 4196a5a0061fSStefan Weinhuber if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) 4197f3eb5384SStefan Weinhuber tsb = tcw_get_tsb( 4198f3eb5384SStefan Weinhuber (struct tcw *)(unsigned long)irb->scsw.tm.tcw); 4199f3eb5384SStefan Weinhuber 4200b8fde722SStefan Haberland if (tsb) { 4201773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4202f3eb5384SStefan Weinhuber " tsb->length %d\n", tsb->length); 4203773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4204f3eb5384SStefan Weinhuber " tsb->flags %x\n", tsb->flags); 4205773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4206f3eb5384SStefan Weinhuber " tsb->dcw_offset %d\n", tsb->dcw_offset); 4207773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4208f3eb5384SStefan Weinhuber " tsb->count %d\n", tsb->count); 4209f3eb5384SStefan Weinhuber residual = tsb->count - 28; 4210773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4211f3eb5384SStefan Weinhuber " residual %d\n", residual); 4212f3eb5384SStefan Weinhuber 4213f3eb5384SStefan Weinhuber switch (tsb->flags & 0x07) { 4214f3eb5384SStefan Weinhuber case 1: /* tsa_iostat */ 4215773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4216f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_time %d\n", 4217f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_time); 4218773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4219f3eb5384SStefan Weinhuber " tsb->tsa.iostat.def_time %d\n", 4220f3eb5384SStefan Weinhuber tsb->tsa.iostat.def_time); 4221773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4222f3eb5384SStefan Weinhuber " tsb->tsa.iostat.queue_time %d\n", 4223f3eb5384SStefan Weinhuber tsb->tsa.iostat.queue_time); 4224773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4225f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_busy_time %d\n", 4226f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_busy_time); 4227773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4228f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_act_time %d\n", 4229f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_act_time); 4230f3eb5384SStefan Weinhuber sense = tsb->tsa.iostat.sense; 4231f3eb5384SStefan Weinhuber break; 4232f3eb5384SStefan Weinhuber case 2: /* ts_ddpc */ 4233773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4234f3eb5384SStefan Weinhuber " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); 4235ef19298bSStefan Weinhuber for (sl = 0; sl < 2; sl++) { 4236773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4237ef19298bSStefan Weinhuber " tsb->tsa.ddpc.rcq %2d-%2d: ", 4238ef19298bSStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 4239ef19298bSStefan Weinhuber rcq = tsb->tsa.ddpc.rcq; 4240f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 4241f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 4242ef19298bSStefan Weinhuber rcq[8 * sl + sct]); 4243f3eb5384SStefan Weinhuber } 4244f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 4245f3eb5384SStefan Weinhuber } 4246f3eb5384SStefan Weinhuber sense = tsb->tsa.ddpc.sense; 4247f3eb5384SStefan Weinhuber break; 4248f3eb5384SStefan Weinhuber case 3: /* tsa_intrg */ 4249773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4250f3eb5384SStefan Weinhuber " tsb->tsa.intrg.: not supportet yet\n"); 4251f3eb5384SStefan Weinhuber break; 4252f3eb5384SStefan Weinhuber } 4253f3eb5384SStefan Weinhuber 4254f3eb5384SStefan Weinhuber if (sense) { 4255f3eb5384SStefan Weinhuber for (sl = 0; sl < 4; sl++) { 4256773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4257f3eb5384SStefan Weinhuber " Sense(hex) %2d-%2d:", 4258f3eb5384SStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 4259f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 4260f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 4261f3eb5384SStefan Weinhuber sense[8 * sl + sct]); 4262f3eb5384SStefan Weinhuber } 4263f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 4264f3eb5384SStefan Weinhuber } 4265f3eb5384SStefan Weinhuber 4266f3eb5384SStefan Weinhuber if (sense[27] & DASD_SENSE_BIT_0) { 4267f3eb5384SStefan Weinhuber /* 24 Byte Sense Data */ 4268773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4269f3eb5384SStefan Weinhuber " 24 Byte: %x MSG %x, " 4270f3eb5384SStefan Weinhuber "%s MSGb to SYSOP\n", 4271f3eb5384SStefan Weinhuber sense[7] >> 4, sense[7] & 0x0f, 4272f3eb5384SStefan Weinhuber sense[1] & 0x10 ? "" : "no"); 4273f3eb5384SStefan Weinhuber } else { 4274f3eb5384SStefan Weinhuber /* 32 Byte Sense Data */ 4275773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4276f3eb5384SStefan Weinhuber " 32 Byte: Format: %x " 4277f3eb5384SStefan Weinhuber "Exception class %x\n", 4278f3eb5384SStefan Weinhuber sense[6] & 0x0f, sense[22] >> 4); 4279f3eb5384SStefan Weinhuber } 4280f3eb5384SStefan Weinhuber } else { 4281773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4282f3eb5384SStefan Weinhuber " SORRY - NO VALID SENSE AVAILABLE\n"); 4283f3eb5384SStefan Weinhuber } 4284f3eb5384SStefan Weinhuber } else { 4285773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4286f3eb5384SStefan Weinhuber " SORRY - NO TSB DATA AVAILABLE\n"); 4287f3eb5384SStefan Weinhuber } 4288773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 4289f3eb5384SStefan Weinhuber free_page((unsigned long) page); 4290f3eb5384SStefan Weinhuber } 4291f3eb5384SStefan Weinhuber 4292f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense(struct dasd_device *device, 4293f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 4294f3eb5384SStefan Weinhuber { 4295a5a0061fSStefan Weinhuber if (scsw_is_tm(&irb->scsw)) 4296f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_tcw(device, req, irb); 4297f3eb5384SStefan Weinhuber else 4298f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_ccw(device, req, irb); 4299f3eb5384SStefan Weinhuber } 4300f3eb5384SStefan Weinhuber 4301501183f2SStefan Haberland static int dasd_eckd_pm_freeze(struct dasd_device *device) 4302d41dd122SStefan Haberland { 4303d41dd122SStefan Haberland /* 4304d41dd122SStefan Haberland * the device should be disconnected from our LCU structure 4305d41dd122SStefan Haberland * on restore we will reconnect it and reread LCU specific 4306d41dd122SStefan Haberland * information like PAV support that might have changed 4307d41dd122SStefan Haberland */ 4308d41dd122SStefan Haberland dasd_alias_remove_device(device); 4309d41dd122SStefan Haberland dasd_alias_disconnect_device_from_lcu(device); 4310d41dd122SStefan Haberland 4311d41dd122SStefan Haberland return 0; 4312d41dd122SStefan Haberland } 4313d41dd122SStefan Haberland 4314501183f2SStefan Haberland static int dasd_eckd_restore_device(struct dasd_device *device) 4315d41dd122SStefan Haberland { 4316d41dd122SStefan Haberland struct dasd_eckd_private *private; 43176fca97a9SStefan Haberland struct dasd_eckd_characteristics temp_rdc_data; 4318f9f8d02fSStefan Haberland int rc; 4319d41dd122SStefan Haberland struct dasd_uid temp_uid; 4320a7602f6cSStefan Haberland unsigned long flags; 4321ea4da6eaSStefan Haberland unsigned long cqr_flags = 0; 4322d41dd122SStefan Haberland 4323d41dd122SStefan Haberland private = (struct dasd_eckd_private *) device->private; 4324d41dd122SStefan Haberland 4325d41dd122SStefan Haberland /* Read Configuration Data */ 432655d3a85cSStefan Haberland dasd_eckd_read_conf(device); 4327d41dd122SStefan Haberland 43282dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 43292dedf0d9SStefan Haberland /* Generate device unique id */ 43302dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 43312dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4332d41dd122SStefan Haberland if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) 4333a7602f6cSStefan Haberland dev_err(&device->cdev->dev, "The UID of the DASD has " 4334a7602f6cSStefan Haberland "changed\n"); 43352dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4336d41dd122SStefan Haberland if (rc) 4337d41dd122SStefan Haberland goto out_err; 4338d41dd122SStefan Haberland 4339d41dd122SStefan Haberland /* register lcu with alias handling, enable PAV if this is a new lcu */ 4340f9f8d02fSStefan Haberland rc = dasd_alias_make_device_known_to_lcu(device); 4341f9f8d02fSStefan Haberland if (rc) 4342f9f8d02fSStefan Haberland return rc; 4343ea4da6eaSStefan Haberland 4344ea4da6eaSStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr_flags); 4345ea4da6eaSStefan Haberland dasd_eckd_validate_server(device, cqr_flags); 4346f4ac1d02SStefan Weinhuber 4347f4ac1d02SStefan Weinhuber /* RE-Read Configuration Data */ 434855d3a85cSStefan Haberland dasd_eckd_read_conf(device); 4349d41dd122SStefan Haberland 4350d41dd122SStefan Haberland /* Read Feature Codes */ 435168d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 4352d41dd122SStefan Haberland 4353d41dd122SStefan Haberland /* Read Device Characteristics */ 435468b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 43556fca97a9SStefan Haberland &temp_rdc_data, 64); 4356d41dd122SStefan Haberland if (rc) { 4357b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 4358b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 4359d41dd122SStefan Haberland goto out_err; 4360d41dd122SStefan Haberland } 4361a7602f6cSStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 43626fca97a9SStefan Haberland memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data)); 4363a7602f6cSStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4364d41dd122SStefan Haberland 4365d41dd122SStefan Haberland /* add device to alias management */ 4366d41dd122SStefan Haberland dasd_alias_add_device(device); 4367d41dd122SStefan Haberland 4368d41dd122SStefan Haberland return 0; 4369d41dd122SStefan Haberland 4370d41dd122SStefan Haberland out_err: 4371e6125fbaSStefan Haberland return -1; 4372d41dd122SStefan Haberland } 4373d41dd122SStefan Haberland 4374501183f2SStefan Haberland static int dasd_eckd_reload_device(struct dasd_device *device) 4375501183f2SStefan Haberland { 4376501183f2SStefan Haberland struct dasd_eckd_private *private; 4377501183f2SStefan Haberland int rc, old_base; 43782dedf0d9SStefan Haberland char print_uid[60]; 43792dedf0d9SStefan Haberland struct dasd_uid uid; 43802dedf0d9SStefan Haberland unsigned long flags; 4381501183f2SStefan Haberland 4382501183f2SStefan Haberland private = (struct dasd_eckd_private *) device->private; 43832dedf0d9SStefan Haberland 43842dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4385501183f2SStefan Haberland old_base = private->uid.base_unit_addr; 43862dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 43872dedf0d9SStefan Haberland 4388501183f2SStefan Haberland /* Read Configuration Data */ 4389501183f2SStefan Haberland rc = dasd_eckd_read_conf(device); 4390501183f2SStefan Haberland if (rc) 4391501183f2SStefan Haberland goto out_err; 4392501183f2SStefan Haberland 43932dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 4394501183f2SStefan Haberland if (rc) 4395501183f2SStefan Haberland goto out_err; 4396501183f2SStefan Haberland /* 4397501183f2SStefan Haberland * update unit address configuration and 4398501183f2SStefan Haberland * add device to alias management 4399501183f2SStefan Haberland */ 4400501183f2SStefan Haberland dasd_alias_update_add_device(device); 4401501183f2SStefan Haberland 44022dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &uid); 44032dedf0d9SStefan Haberland 44042dedf0d9SStefan Haberland if (old_base != uid.base_unit_addr) { 44052dedf0d9SStefan Haberland if (strlen(uid.vduit) > 0) 44062dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 44072dedf0d9SStefan Haberland "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial, 44082dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr, uid.vduit); 4409501183f2SStefan Haberland else 44102dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 44112dedf0d9SStefan Haberland "%s.%s.%04x.%02x", uid.vendor, uid.serial, 44122dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr); 4413501183f2SStefan Haberland 4414501183f2SStefan Haberland dev_info(&device->cdev->dev, 4415501183f2SStefan Haberland "An Alias device was reassigned to a new base device " 44162dedf0d9SStefan Haberland "with UID: %s\n", print_uid); 4417501183f2SStefan Haberland } 4418501183f2SStefan Haberland return 0; 4419501183f2SStefan Haberland 4420501183f2SStefan Haberland out_err: 4421501183f2SStefan Haberland return -1; 4422501183f2SStefan Haberland } 4423501183f2SStefan Haberland 4424d41dd122SStefan Haberland static struct ccw_driver dasd_eckd_driver = { 44253bda058bSSebastian Ott .driver = { 4426d41dd122SStefan Haberland .name = "dasd-eckd", 4427d41dd122SStefan Haberland .owner = THIS_MODULE, 44283bda058bSSebastian Ott }, 4429d41dd122SStefan Haberland .ids = dasd_eckd_ids, 4430d41dd122SStefan Haberland .probe = dasd_eckd_probe, 4431d41dd122SStefan Haberland .remove = dasd_generic_remove, 4432d41dd122SStefan Haberland .set_offline = dasd_generic_set_offline, 4433d41dd122SStefan Haberland .set_online = dasd_eckd_set_online, 4434d41dd122SStefan Haberland .notify = dasd_generic_notify, 4435a4d26c6aSStefan Weinhuber .path_event = dasd_generic_path_event, 44364679e893SStefan Haberland .shutdown = dasd_generic_shutdown, 4437d41dd122SStefan Haberland .freeze = dasd_generic_pm_freeze, 4438d41dd122SStefan Haberland .thaw = dasd_generic_restore_device, 4439d41dd122SStefan Haberland .restore = dasd_generic_restore_device, 4440a23ed009SStefan Haberland .uc_handler = dasd_generic_uc_handler, 4441420f42ecSHeiko Carstens .int_class = IRQIO_DAS, 4442d41dd122SStefan Haberland }; 4443f3eb5384SStefan Weinhuber 44441da177e4SLinus Torvalds /* 44451da177e4SLinus Torvalds * max_blocks is dependent on the amount of storage that is available 44461da177e4SLinus Torvalds * in the static io buffer for each device. Currently each device has 44471da177e4SLinus Torvalds * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has 44481da177e4SLinus Torvalds * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use 44491da177e4SLinus Torvalds * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In 44501da177e4SLinus Torvalds * addition we have one define extent ccw + 16 bytes of data and one 44511da177e4SLinus Torvalds * locate record ccw + 16 bytes of data. That makes: 44521da177e4SLinus Torvalds * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. 44531da177e4SLinus Torvalds * We want to fit two into the available memory so that we can immediately 44541da177e4SLinus Torvalds * start the next request if one finishes off. That makes 249.5 blocks 44551da177e4SLinus Torvalds * for one request. Give a little safety and the result is 240. 44561da177e4SLinus Torvalds */ 44571da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline = { 44581da177e4SLinus Torvalds .owner = THIS_MODULE, 44591da177e4SLinus Torvalds .name = "ECKD", 44601da177e4SLinus Torvalds .ebcname = "ECKD", 4461ef19298bSStefan Weinhuber .max_blocks = 190, 44621da177e4SLinus Torvalds .check_device = dasd_eckd_check_characteristics, 44638e09f215SStefan Weinhuber .uncheck_device = dasd_eckd_uncheck_device, 44641da177e4SLinus Torvalds .do_analysis = dasd_eckd_do_analysis, 4465a4d26c6aSStefan Weinhuber .verify_path = dasd_eckd_verify_path, 4466d42e1712SStefan Haberland .basic_to_ready = dasd_eckd_basic_to_ready, 44678e09f215SStefan Weinhuber .online_to_ready = dasd_eckd_online_to_ready, 4468d42e1712SStefan Haberland .ready_to_basic = dasd_eckd_ready_to_basic, 44691da177e4SLinus Torvalds .fill_geometry = dasd_eckd_fill_geometry, 44701da177e4SLinus Torvalds .start_IO = dasd_start_IO, 44711da177e4SLinus Torvalds .term_IO = dasd_term_IO, 44728e09f215SStefan Weinhuber .handle_terminated_request = dasd_eckd_handle_terminated_request, 44731da177e4SLinus Torvalds .format_device = dasd_eckd_format_device, 44741da177e4SLinus Torvalds .erp_action = dasd_eckd_erp_action, 44751da177e4SLinus Torvalds .erp_postaction = dasd_eckd_erp_postaction, 44765a27e60dSStefan Weinhuber .check_for_device_change = dasd_eckd_check_for_device_change, 44778e09f215SStefan Weinhuber .build_cp = dasd_eckd_build_alias_cp, 44788e09f215SStefan Weinhuber .free_cp = dasd_eckd_free_alias_cp, 44791da177e4SLinus Torvalds .dump_sense = dasd_eckd_dump_sense, 4480fc19f381SStefan Haberland .dump_sense_dbf = dasd_eckd_dump_sense_dbf, 44811da177e4SLinus Torvalds .fill_info = dasd_eckd_fill_info, 44821107ccfbSChristoph Hellwig .ioctl = dasd_eckd_ioctl, 4483d41dd122SStefan Haberland .freeze = dasd_eckd_pm_freeze, 4484d41dd122SStefan Haberland .restore = dasd_eckd_restore_device, 4485501183f2SStefan Haberland .reload = dasd_eckd_reload_device, 44862dedf0d9SStefan Haberland .get_uid = dasd_eckd_get_uid, 4487f1633031SStefan Haberland .kick_validate = dasd_eckd_kick_validate_server, 44881da177e4SLinus Torvalds }; 44891da177e4SLinus Torvalds 44901da177e4SLinus Torvalds static int __init 44911da177e4SLinus Torvalds dasd_eckd_init(void) 44921da177e4SLinus Torvalds { 4493736e6ea0SSebastian Ott int ret; 4494736e6ea0SSebastian Ott 44951da177e4SLinus Torvalds ASCEBC(dasd_eckd_discipline.ebcname, 4); 4496f932bceaSStefan Weinhuber dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), 4497f932bceaSStefan Weinhuber GFP_KERNEL | GFP_DMA); 4498f932bceaSStefan Weinhuber if (!dasd_reserve_req) 4499f932bceaSStefan Weinhuber return -ENOMEM; 4500a4d26c6aSStefan Weinhuber path_verification_worker = kmalloc(sizeof(*path_verification_worker), 4501a4d26c6aSStefan Weinhuber GFP_KERNEL | GFP_DMA); 4502a4d26c6aSStefan Weinhuber if (!path_verification_worker) { 4503a4d26c6aSStefan Weinhuber kfree(dasd_reserve_req); 4504a4d26c6aSStefan Weinhuber return -ENOMEM; 4505a4d26c6aSStefan Weinhuber } 4506558b9ef0SStefan Weinhuber rawpadpage = (void *)__get_free_page(GFP_KERNEL); 4507558b9ef0SStefan Weinhuber if (!rawpadpage) { 4508558b9ef0SStefan Weinhuber kfree(path_verification_worker); 4509558b9ef0SStefan Weinhuber kfree(dasd_reserve_req); 4510558b9ef0SStefan Weinhuber return -ENOMEM; 4511558b9ef0SStefan Weinhuber } 4512736e6ea0SSebastian Ott ret = ccw_driver_register(&dasd_eckd_driver); 4513736e6ea0SSebastian Ott if (!ret) 4514736e6ea0SSebastian Ott wait_for_device_probe(); 4515a4d26c6aSStefan Weinhuber else { 4516a4d26c6aSStefan Weinhuber kfree(path_verification_worker); 4517f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 4518558b9ef0SStefan Weinhuber free_page((unsigned long)rawpadpage); 4519a4d26c6aSStefan Weinhuber } 4520736e6ea0SSebastian Ott return ret; 45211da177e4SLinus Torvalds } 45221da177e4SLinus Torvalds 45231da177e4SLinus Torvalds static void __exit 45241da177e4SLinus Torvalds dasd_eckd_cleanup(void) 45251da177e4SLinus Torvalds { 45261da177e4SLinus Torvalds ccw_driver_unregister(&dasd_eckd_driver); 4527a4d26c6aSStefan Weinhuber kfree(path_verification_worker); 4528f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 4529558b9ef0SStefan Weinhuber free_page((unsigned long)rawpadpage); 45301da177e4SLinus Torvalds } 45311da177e4SLinus Torvalds 45321da177e4SLinus Torvalds module_init(dasd_eckd_init); 45331da177e4SLinus Torvalds module_exit(dasd_eckd_cleanup); 4534