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 88eb6e199bSStefan Weinhuber #define INIT_CQR_OK 0 89eb6e199bSStefan Weinhuber #define INIT_CQR_UNFORMATTED 1 90eb6e199bSStefan Weinhuber #define INIT_CQR_ERROR 2 91eb6e199bSStefan Weinhuber 92f932bceaSStefan Weinhuber /* emergency request for reserve/release */ 93f932bceaSStefan Weinhuber static struct { 94f932bceaSStefan Weinhuber struct dasd_ccw_req cqr; 95f932bceaSStefan Weinhuber struct ccw1 ccw; 96f932bceaSStefan Weinhuber char data[32]; 97f932bceaSStefan Weinhuber } *dasd_reserve_req; 98f932bceaSStefan Weinhuber static DEFINE_MUTEX(dasd_reserve_mutex); 99f932bceaSStefan Weinhuber 100a4d26c6aSStefan Weinhuber /* definitions for the path verification worker */ 101a4d26c6aSStefan Weinhuber struct path_verification_work_data { 102a4d26c6aSStefan Weinhuber struct work_struct worker; 103a4d26c6aSStefan Weinhuber struct dasd_device *device; 104a4d26c6aSStefan Weinhuber struct dasd_ccw_req cqr; 105a4d26c6aSStefan Weinhuber struct ccw1 ccw; 106a4d26c6aSStefan Weinhuber __u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE]; 107a4d26c6aSStefan Weinhuber int isglobal; 108a4d26c6aSStefan Weinhuber __u8 tbvpm; 109a4d26c6aSStefan Weinhuber }; 110a4d26c6aSStefan Weinhuber static struct path_verification_work_data *path_verification_worker; 111a4d26c6aSStefan Weinhuber static DEFINE_MUTEX(dasd_path_verification_mutex); 112eb6e199bSStefan Weinhuber 1131da177e4SLinus Torvalds /* initial attempt at a probe function. this can be simplified once 1141da177e4SLinus Torvalds * the other detection code is gone */ 1151da177e4SLinus Torvalds static int 1161da177e4SLinus Torvalds dasd_eckd_probe (struct ccw_device *cdev) 1171da177e4SLinus Torvalds { 1181da177e4SLinus Torvalds int ret; 1191da177e4SLinus Torvalds 12040545573SHorst Hummel /* set ECKD specific ccw-device options */ 121454e1fa1SPeter Oberparleiter ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE | 122454e1fa1SPeter Oberparleiter CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH); 12340545573SHorst Hummel if (ret) { 124b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s", 125b8ed5dd5SStefan Haberland "dasd_eckd_probe: could not set " 126b8ed5dd5SStefan Haberland "ccw-device options"); 1271da177e4SLinus Torvalds return ret; 12840545573SHorst Hummel } 12940545573SHorst Hummel ret = dasd_generic_probe(cdev, &dasd_eckd_discipline); 13040545573SHorst Hummel return ret; 1311da177e4SLinus Torvalds } 1321da177e4SLinus Torvalds 1331da177e4SLinus Torvalds static int 1341da177e4SLinus Torvalds dasd_eckd_set_online(struct ccw_device *cdev) 1351da177e4SLinus Torvalds { 1361da177e4SLinus Torvalds return dasd_generic_set_online(cdev, &dasd_eckd_discipline); 1371da177e4SLinus Torvalds } 1381da177e4SLinus Torvalds 1391da177e4SLinus Torvalds static const int sizes_trk0[] = { 28, 148, 84 }; 1401da177e4SLinus Torvalds #define LABEL_SIZE 140 1411da177e4SLinus Torvalds 1423bc9fef9SStefan Haberland /* head and record addresses of count_area read in analysis ccw */ 1433bc9fef9SStefan Haberland static const int count_area_head[] = { 0, 0, 0, 0, 2 }; 1443bc9fef9SStefan Haberland static const int count_area_rec[] = { 1, 2, 3, 4, 1 }; 1453bc9fef9SStefan Haberland 1461da177e4SLinus Torvalds static inline unsigned int 1471da177e4SLinus Torvalds round_up_multiple(unsigned int no, unsigned int mult) 1481da177e4SLinus Torvalds { 1491da177e4SLinus Torvalds int rem = no % mult; 1501da177e4SLinus Torvalds return (rem ? no - rem + mult : no); 1511da177e4SLinus Torvalds } 1521da177e4SLinus Torvalds 1531da177e4SLinus Torvalds static inline unsigned int 1541da177e4SLinus Torvalds ceil_quot(unsigned int d1, unsigned int d2) 1551da177e4SLinus Torvalds { 1561da177e4SLinus Torvalds return (d1 + (d2 - 1)) / d2; 1571da177e4SLinus Torvalds } 1581da177e4SLinus Torvalds 1594d284cacSHeiko Carstens static unsigned int 1601da177e4SLinus Torvalds recs_per_track(struct dasd_eckd_characteristics * rdc, 1611da177e4SLinus Torvalds unsigned int kl, unsigned int dl) 1621da177e4SLinus Torvalds { 1631da177e4SLinus Torvalds int dn, kn; 1641da177e4SLinus Torvalds 1651da177e4SLinus Torvalds switch (rdc->dev_type) { 1661da177e4SLinus Torvalds case 0x3380: 1671da177e4SLinus Torvalds if (kl) 1681da177e4SLinus Torvalds return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + 1691da177e4SLinus Torvalds ceil_quot(dl + 12, 32)); 1701da177e4SLinus Torvalds else 1711da177e4SLinus Torvalds return 1499 / (15 + ceil_quot(dl + 12, 32)); 1721da177e4SLinus Torvalds case 0x3390: 1731da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1741da177e4SLinus Torvalds if (kl) { 1751da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1761da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + 1771da177e4SLinus Torvalds 9 + ceil_quot(dl + 6 * dn, 34)); 1781da177e4SLinus Torvalds } else 1791da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); 1801da177e4SLinus Torvalds case 0x9345: 1811da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1821da177e4SLinus Torvalds if (kl) { 1831da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1841da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + 1851da177e4SLinus Torvalds ceil_quot(dl + 6 * dn, 34)); 1861da177e4SLinus Torvalds } else 1871da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); 1881da177e4SLinus Torvalds } 1891da177e4SLinus Torvalds return 0; 1901da177e4SLinus Torvalds } 1911da177e4SLinus Torvalds 192b44b0ab3SStefan Weinhuber static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head) 193b44b0ab3SStefan Weinhuber { 194b44b0ab3SStefan Weinhuber geo->cyl = (__u16) cyl; 195b44b0ab3SStefan Weinhuber geo->head = cyl >> 16; 196b44b0ab3SStefan Weinhuber geo->head <<= 4; 197b44b0ab3SStefan Weinhuber geo->head |= head; 198b44b0ab3SStefan Weinhuber } 199b44b0ab3SStefan Weinhuber 2004d284cacSHeiko Carstens static int 2011da177e4SLinus Torvalds check_XRC (struct ccw1 *de_ccw, 2021da177e4SLinus Torvalds struct DE_eckd_data *data, 2031da177e4SLinus Torvalds struct dasd_device *device) 2041da177e4SLinus Torvalds { 2051da177e4SLinus Torvalds struct dasd_eckd_private *private; 206d54853efSMartin Schwidefsky int rc; 2071da177e4SLinus Torvalds 2081da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 209d54853efSMartin Schwidefsky if (!private->rdc_data.facilities.XRC_supported) 210d54853efSMartin Schwidefsky return 0; 2111da177e4SLinus Torvalds 2121da177e4SLinus Torvalds /* switch on System Time Stamp - needed for XRC Support */ 2131da177e4SLinus Torvalds data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ 2141da177e4SLinus Torvalds data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ 2151da177e4SLinus Torvalds 216d54853efSMartin Schwidefsky rc = get_sync_clock(&data->ep_sys_time); 217d54853efSMartin Schwidefsky /* Ignore return code if sync clock is switched off. */ 218a8f6db4dSHeiko Carstens if (rc == -EOPNOTSUPP || rc == -EACCES) 219d54853efSMartin Schwidefsky rc = 0; 2201da177e4SLinus Torvalds 2211da177e4SLinus Torvalds de_ccw->count = sizeof(struct DE_eckd_data); 2221da177e4SLinus Torvalds de_ccw->flags |= CCW_FLAG_SLI; 223d54853efSMartin Schwidefsky return rc; 2241da177e4SLinus Torvalds } 2251da177e4SLinus Torvalds 2264d284cacSHeiko Carstens static int 227b44b0ab3SStefan Weinhuber define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk, 228b44b0ab3SStefan Weinhuber unsigned int totrk, int cmd, struct dasd_device *device) 2291da177e4SLinus Torvalds { 2301da177e4SLinus Torvalds struct dasd_eckd_private *private; 231b44b0ab3SStefan Weinhuber u32 begcyl, endcyl; 232b44b0ab3SStefan Weinhuber u16 heads, beghead, endhead; 233d54853efSMartin Schwidefsky int rc = 0; 2341da177e4SLinus Torvalds 2351da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 2361da177e4SLinus Torvalds 2371da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; 2381da177e4SLinus Torvalds ccw->flags = 0; 2391da177e4SLinus Torvalds ccw->count = 16; 2401da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 2411da177e4SLinus Torvalds 2421da177e4SLinus Torvalds memset(data, 0, sizeof(struct DE_eckd_data)); 2431da177e4SLinus Torvalds switch (cmd) { 2441da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 2451da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 2461da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 2471da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 2481da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 2491da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 2501da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 2511da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 2521da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_COUNT: 2531da177e4SLinus Torvalds data->mask.perm = 0x1; 2541da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 2551da177e4SLinus Torvalds break; 2561da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 2571da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 2581da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 2591da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 2601da177e4SLinus Torvalds data->mask.perm = 0x02; 2611da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 262d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2631da177e4SLinus Torvalds break; 2641da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 2651da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 2661da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 267d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2681da177e4SLinus Torvalds break; 2691da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 2701da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 2711da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 2721da177e4SLinus Torvalds data->mask.perm = 0x3; 2731da177e4SLinus Torvalds data->mask.auth = 0x1; 2741da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 275d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2761da177e4SLinus Torvalds break; 2771da177e4SLinus Torvalds default: 278fc19f381SStefan Haberland dev_err(&device->cdev->dev, 279fc19f381SStefan Haberland "0x%x is not a known command\n", cmd); 2801da177e4SLinus Torvalds break; 2811da177e4SLinus Torvalds } 2821da177e4SLinus Torvalds 2831da177e4SLinus Torvalds data->attributes.mode = 0x3; /* ECKD */ 2841da177e4SLinus Torvalds 2851da177e4SLinus Torvalds if ((private->rdc_data.cu_type == 0x2105 || 2861da177e4SLinus Torvalds private->rdc_data.cu_type == 0x2107 || 2871da177e4SLinus Torvalds private->rdc_data.cu_type == 0x1750) 2881da177e4SLinus Torvalds && !(private->uses_cdl && trk < 2)) 2891da177e4SLinus Torvalds data->ga_extended |= 0x40; /* Regular Data Format Mode */ 2901da177e4SLinus Torvalds 291b44b0ab3SStefan Weinhuber heads = private->rdc_data.trk_per_cyl; 292b44b0ab3SStefan Weinhuber begcyl = trk / heads; 293b44b0ab3SStefan Weinhuber beghead = trk % heads; 294b44b0ab3SStefan Weinhuber endcyl = totrk / heads; 295b44b0ab3SStefan Weinhuber endhead = totrk % heads; 2961da177e4SLinus Torvalds 2971da177e4SLinus Torvalds /* check for sequential prestage - enhance cylinder range */ 2981da177e4SLinus Torvalds if (data->attributes.operation == DASD_SEQ_PRESTAGE || 2991da177e4SLinus Torvalds data->attributes.operation == DASD_SEQ_ACCESS) { 3001da177e4SLinus Torvalds 301b44b0ab3SStefan Weinhuber if (endcyl + private->attrib.nr_cyl < private->real_cyl) 302b44b0ab3SStefan Weinhuber endcyl += private->attrib.nr_cyl; 3031da177e4SLinus Torvalds else 304b44b0ab3SStefan Weinhuber endcyl = (private->real_cyl - 1); 3051da177e4SLinus Torvalds } 3061da177e4SLinus Torvalds 307b44b0ab3SStefan Weinhuber set_ch_t(&data->beg_ext, begcyl, beghead); 308b44b0ab3SStefan Weinhuber set_ch_t(&data->end_ext, endcyl, endhead); 309d54853efSMartin Schwidefsky return rc; 3101da177e4SLinus Torvalds } 3111da177e4SLinus Torvalds 3128e09f215SStefan Weinhuber static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata, 3138e09f215SStefan Weinhuber struct dasd_device *device) 3148e09f215SStefan Weinhuber { 3158e09f215SStefan Weinhuber struct dasd_eckd_private *private; 3168e09f215SStefan Weinhuber int rc; 3178e09f215SStefan Weinhuber 3188e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 3198e09f215SStefan Weinhuber if (!private->rdc_data.facilities.XRC_supported) 3208e09f215SStefan Weinhuber return 0; 3218e09f215SStefan Weinhuber 3228e09f215SStefan Weinhuber /* switch on System Time Stamp - needed for XRC Support */ 323f3eb5384SStefan Weinhuber pfxdata->define_extent.ga_extended |= 0x08; /* 'Time Stamp Valid' */ 324f3eb5384SStefan Weinhuber pfxdata->define_extent.ga_extended |= 0x02; /* 'Extended Parameter' */ 3258e09f215SStefan Weinhuber pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */ 3268e09f215SStefan Weinhuber 327f3eb5384SStefan Weinhuber rc = get_sync_clock(&pfxdata->define_extent.ep_sys_time); 3288e09f215SStefan Weinhuber /* Ignore return code if sync clock is switched off. */ 329a8f6db4dSHeiko Carstens if (rc == -EOPNOTSUPP || rc == -EACCES) 3308e09f215SStefan Weinhuber rc = 0; 3318e09f215SStefan Weinhuber return rc; 3328e09f215SStefan Weinhuber } 3338e09f215SStefan Weinhuber 334f3eb5384SStefan Weinhuber static void fill_LRE_data(struct LRE_eckd_data *data, unsigned int trk, 335f3eb5384SStefan Weinhuber unsigned int rec_on_trk, int count, int cmd, 336f3eb5384SStefan Weinhuber struct dasd_device *device, unsigned int reclen, 337f3eb5384SStefan Weinhuber unsigned int tlf) 338f3eb5384SStefan Weinhuber { 339f3eb5384SStefan Weinhuber struct dasd_eckd_private *private; 340f3eb5384SStefan Weinhuber int sector; 341f3eb5384SStefan Weinhuber int dn, d; 342f3eb5384SStefan Weinhuber 343f3eb5384SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 344f3eb5384SStefan Weinhuber 345f3eb5384SStefan Weinhuber memset(data, 0, sizeof(*data)); 346f3eb5384SStefan Weinhuber sector = 0; 347f3eb5384SStefan Weinhuber if (rec_on_trk) { 348f3eb5384SStefan Weinhuber switch (private->rdc_data.dev_type) { 349f3eb5384SStefan Weinhuber case 0x3390: 350f3eb5384SStefan Weinhuber dn = ceil_quot(reclen + 6, 232); 351f3eb5384SStefan Weinhuber d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 352f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 353f3eb5384SStefan Weinhuber break; 354f3eb5384SStefan Weinhuber case 0x3380: 355f3eb5384SStefan Weinhuber d = 7 + ceil_quot(reclen + 12, 32); 356f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 357f3eb5384SStefan Weinhuber break; 358f3eb5384SStefan Weinhuber } 359f3eb5384SStefan Weinhuber } 360f3eb5384SStefan Weinhuber data->sector = sector; 361f3eb5384SStefan Weinhuber /* note: meaning of count depends on the operation 362f3eb5384SStefan Weinhuber * for record based I/O it's the number of records, but for 363f3eb5384SStefan Weinhuber * track based I/O it's the number of tracks 364f3eb5384SStefan Weinhuber */ 365f3eb5384SStefan Weinhuber data->count = count; 366f3eb5384SStefan Weinhuber switch (cmd) { 367f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 368f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 369f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 370f3eb5384SStefan Weinhuber break; 371f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_HOME_ADDRESS: 372f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 373f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 374f3eb5384SStefan Weinhuber break; 375f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 376f3eb5384SStefan Weinhuber data->operation.orientation = 0x1; 377f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 378f3eb5384SStefan Weinhuber data->count++; 379f3eb5384SStefan Weinhuber break; 380f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_RECORD_ZERO: 381f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 382f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 383f3eb5384SStefan Weinhuber data->count++; 384f3eb5384SStefan Weinhuber break; 385f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE: 386f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_MT: 387f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD: 388f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD_MT: 389f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 390f3eb5384SStefan Weinhuber data->length = reclen; 391f3eb5384SStefan Weinhuber data->operation.operation = 0x01; 392f3eb5384SStefan Weinhuber break; 393f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD: 394f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD_MT: 395f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 396f3eb5384SStefan Weinhuber data->length = reclen; 397f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 398f3eb5384SStefan Weinhuber break; 399e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_WRITE_FULL_TRACK: 400e4dbb0f2SStefan Haberland data->operation.orientation = 0x0; 401e4dbb0f2SStefan Haberland data->operation.operation = 0x3F; 402e4dbb0f2SStefan Haberland data->extended_operation = 0x11; 403e4dbb0f2SStefan Haberland data->length = 0; 404e4dbb0f2SStefan Haberland data->extended_parameter_length = 0x02; 405e4dbb0f2SStefan Haberland if (data->count > 8) { 406e4dbb0f2SStefan Haberland data->extended_parameter[0] = 0xFF; 407e4dbb0f2SStefan Haberland data->extended_parameter[1] = 0xFF; 408e4dbb0f2SStefan Haberland data->extended_parameter[1] <<= (16 - count); 409e4dbb0f2SStefan Haberland } else { 410e4dbb0f2SStefan Haberland data->extended_parameter[0] = 0xFF; 411e4dbb0f2SStefan Haberland data->extended_parameter[0] <<= (8 - count); 412e4dbb0f2SStefan Haberland data->extended_parameter[1] = 0x00; 413e4dbb0f2SStefan Haberland } 414e4dbb0f2SStefan Haberland data->sector = 0xFF; 415e4dbb0f2SStefan Haberland break; 416f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 417f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 418f3eb5384SStefan Weinhuber data->length = reclen; /* not tlf, as one might think */ 419f3eb5384SStefan Weinhuber data->operation.operation = 0x3F; 420f3eb5384SStefan Weinhuber data->extended_operation = 0x23; 421f3eb5384SStefan Weinhuber break; 422f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ: 423f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_MT: 424f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_KD: 425f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_KD_MT: 426f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 427f3eb5384SStefan Weinhuber data->length = reclen; 428f3eb5384SStefan Weinhuber data->operation.operation = 0x06; 429f3eb5384SStefan Weinhuber break; 430f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD: 431f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD_MT: 432f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 433f3eb5384SStefan Weinhuber data->length = reclen; 434f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 435f3eb5384SStefan Weinhuber break; 436f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_COUNT: 437f3eb5384SStefan Weinhuber data->operation.operation = 0x06; 438f3eb5384SStefan Weinhuber break; 439e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_READ_TRACK: 440e4dbb0f2SStefan Haberland data->operation.orientation = 0x1; 441e4dbb0f2SStefan Haberland data->operation.operation = 0x0C; 442e4dbb0f2SStefan Haberland data->extended_parameter_length = 0; 443e4dbb0f2SStefan Haberland data->sector = 0xFF; 444e4dbb0f2SStefan Haberland break; 445f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 446f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 447f3eb5384SStefan Weinhuber data->length = tlf; 448f3eb5384SStefan Weinhuber data->operation.operation = 0x0C; 449f3eb5384SStefan Weinhuber break; 450f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_ERASE: 451f3eb5384SStefan Weinhuber data->length = reclen; 452f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 453f3eb5384SStefan Weinhuber data->operation.operation = 0x0b; 454f3eb5384SStefan Weinhuber break; 455f3eb5384SStefan Weinhuber default: 456f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, device, 457f3eb5384SStefan Weinhuber "fill LRE unknown opcode 0x%x", cmd); 458f3eb5384SStefan Weinhuber BUG(); 459f3eb5384SStefan Weinhuber } 460f3eb5384SStefan Weinhuber set_ch_t(&data->seek_addr, 461f3eb5384SStefan Weinhuber trk / private->rdc_data.trk_per_cyl, 462f3eb5384SStefan Weinhuber trk % private->rdc_data.trk_per_cyl); 463f3eb5384SStefan Weinhuber data->search_arg.cyl = data->seek_addr.cyl; 464f3eb5384SStefan Weinhuber data->search_arg.head = data->seek_addr.head; 465f3eb5384SStefan Weinhuber data->search_arg.record = rec_on_trk; 466f3eb5384SStefan Weinhuber } 467f3eb5384SStefan Weinhuber 468f3eb5384SStefan Weinhuber static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 469b44b0ab3SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 470f3eb5384SStefan Weinhuber struct dasd_device *basedev, struct dasd_device *startdev, 471f3eb5384SStefan Weinhuber unsigned char format, unsigned int rec_on_trk, int count, 472f3eb5384SStefan Weinhuber unsigned int blksize, unsigned int tlf) 4738e09f215SStefan Weinhuber { 4748e09f215SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 475f3eb5384SStefan Weinhuber struct DE_eckd_data *dedata; 476f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 477b44b0ab3SStefan Weinhuber u32 begcyl, endcyl; 478b44b0ab3SStefan Weinhuber u16 heads, beghead, endhead; 4798e09f215SStefan Weinhuber int rc = 0; 4808e09f215SStefan Weinhuber 4818e09f215SStefan Weinhuber basepriv = (struct dasd_eckd_private *) basedev->private; 4828e09f215SStefan Weinhuber startpriv = (struct dasd_eckd_private *) startdev->private; 483f3eb5384SStefan Weinhuber dedata = &pfxdata->define_extent; 484f3eb5384SStefan Weinhuber lredata = &pfxdata->locate_record; 4858e09f215SStefan Weinhuber 4868e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PFX; 4878e09f215SStefan Weinhuber ccw->flags = 0; 488e4dbb0f2SStefan Haberland if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) { 489e4dbb0f2SStefan Haberland ccw->count = sizeof(*pfxdata) + 2; 490e4dbb0f2SStefan Haberland ccw->cda = (__u32) __pa(pfxdata); 491e4dbb0f2SStefan Haberland memset(pfxdata, 0, sizeof(*pfxdata) + 2); 492e4dbb0f2SStefan Haberland } else { 4938e09f215SStefan Weinhuber ccw->count = sizeof(*pfxdata); 4948e09f215SStefan Weinhuber ccw->cda = (__u32) __pa(pfxdata); 4958e09f215SStefan Weinhuber memset(pfxdata, 0, sizeof(*pfxdata)); 496e4dbb0f2SStefan Haberland } 497e4dbb0f2SStefan Haberland 4988e09f215SStefan Weinhuber /* prefix data */ 499f3eb5384SStefan Weinhuber if (format > 1) { 500f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 501f3eb5384SStefan Weinhuber "PFX LRE unknown format 0x%x", format); 502f3eb5384SStefan Weinhuber BUG(); 503f3eb5384SStefan Weinhuber return -EINVAL; 504f3eb5384SStefan Weinhuber } 505f3eb5384SStefan Weinhuber pfxdata->format = format; 5064abb08c2SStefan Weinhuber pfxdata->base_address = basepriv->ned->unit_addr; 5074abb08c2SStefan Weinhuber pfxdata->base_lss = basepriv->ned->ID; 508f3eb5384SStefan Weinhuber pfxdata->validity.define_extent = 1; 5098e09f215SStefan Weinhuber 5108e09f215SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 5118e09f215SStefan Weinhuber if (startpriv->uid.type != UA_BASE_DEVICE) { 5128e09f215SStefan Weinhuber pfxdata->validity.verify_base = 1; 5138e09f215SStefan Weinhuber if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 5148e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 1; 5158e09f215SStefan Weinhuber } 5168e09f215SStefan Weinhuber 5178e09f215SStefan Weinhuber /* define extend data (mostly)*/ 5188e09f215SStefan Weinhuber switch (cmd) { 5198e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_HOME_ADDRESS: 5208e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_RECORD_ZERO: 5218e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ: 5228e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_MT: 5238e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD: 5248e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD_MT: 5258e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_KD: 5268e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_KD_MT: 5278e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_COUNT: 528f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 529f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 530f3eb5384SStefan Weinhuber break; 531e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_READ_TRACK: 532f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 533f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 534f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 535f3eb5384SStefan Weinhuber dedata->blk_size = 0; 5368e09f215SStefan Weinhuber break; 5378e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE: 5388e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_MT: 5398e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD: 5408e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD_MT: 541f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 542f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 5438e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 5448e09f215SStefan Weinhuber break; 5458e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD: 5468e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD_MT: 547f3eb5384SStefan Weinhuber dedata->attributes.operation = DASD_BYPASS_CACHE; 5488e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 5498e09f215SStefan Weinhuber break; 5508e09f215SStefan Weinhuber case DASD_ECKD_CCW_ERASE: 5518e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 5528e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 553f3eb5384SStefan Weinhuber dedata->mask.perm = 0x3; 554f3eb5384SStefan Weinhuber dedata->mask.auth = 0x1; 555f3eb5384SStefan Weinhuber dedata->attributes.operation = DASD_BYPASS_CACHE; 556f3eb5384SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 557f3eb5384SStefan Weinhuber break; 558e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_WRITE_FULL_TRACK: 559e4dbb0f2SStefan Haberland dedata->mask.perm = 0x03; 560e4dbb0f2SStefan Haberland dedata->attributes.operation = basepriv->attrib.operation; 561e4dbb0f2SStefan Haberland dedata->blk_size = 0; 562e4dbb0f2SStefan Haberland break; 563f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 564f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 565f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 566f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 5678e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 5688e09f215SStefan Weinhuber break; 5698e09f215SStefan Weinhuber default: 570f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 571f3eb5384SStefan Weinhuber "PFX LRE unknown opcode 0x%x", cmd); 572f3eb5384SStefan Weinhuber BUG(); 573f3eb5384SStefan Weinhuber return -EINVAL; 5748e09f215SStefan Weinhuber } 5758e09f215SStefan Weinhuber 576f3eb5384SStefan Weinhuber dedata->attributes.mode = 0x3; /* ECKD */ 5778e09f215SStefan Weinhuber 5788e09f215SStefan Weinhuber if ((basepriv->rdc_data.cu_type == 0x2105 || 5798e09f215SStefan Weinhuber basepriv->rdc_data.cu_type == 0x2107 || 5808e09f215SStefan Weinhuber basepriv->rdc_data.cu_type == 0x1750) 5818e09f215SStefan Weinhuber && !(basepriv->uses_cdl && trk < 2)) 582f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x40; /* Regular Data Format Mode */ 5838e09f215SStefan Weinhuber 584b44b0ab3SStefan Weinhuber heads = basepriv->rdc_data.trk_per_cyl; 585b44b0ab3SStefan Weinhuber begcyl = trk / heads; 586b44b0ab3SStefan Weinhuber beghead = trk % heads; 587b44b0ab3SStefan Weinhuber endcyl = totrk / heads; 588b44b0ab3SStefan Weinhuber endhead = totrk % heads; 5898e09f215SStefan Weinhuber 5908e09f215SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 591f3eb5384SStefan Weinhuber if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 592f3eb5384SStefan Weinhuber dedata->attributes.operation == DASD_SEQ_ACCESS) { 5938e09f215SStefan Weinhuber 594b44b0ab3SStefan Weinhuber if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 595b44b0ab3SStefan Weinhuber endcyl += basepriv->attrib.nr_cyl; 5968e09f215SStefan Weinhuber else 597b44b0ab3SStefan Weinhuber endcyl = (basepriv->real_cyl - 1); 5988e09f215SStefan Weinhuber } 5998e09f215SStefan Weinhuber 600f3eb5384SStefan Weinhuber set_ch_t(&dedata->beg_ext, begcyl, beghead); 601f3eb5384SStefan Weinhuber set_ch_t(&dedata->end_ext, endcyl, endhead); 602f3eb5384SStefan Weinhuber 603f3eb5384SStefan Weinhuber if (format == 1) { 604f3eb5384SStefan Weinhuber fill_LRE_data(lredata, trk, rec_on_trk, count, cmd, 605f3eb5384SStefan Weinhuber basedev, blksize, tlf); 606f3eb5384SStefan Weinhuber } 607f3eb5384SStefan Weinhuber 6088e09f215SStefan Weinhuber return rc; 6098e09f215SStefan Weinhuber } 6108e09f215SStefan Weinhuber 611f3eb5384SStefan Weinhuber static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 612f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 613f3eb5384SStefan Weinhuber struct dasd_device *basedev, struct dasd_device *startdev) 614f3eb5384SStefan Weinhuber { 615f3eb5384SStefan Weinhuber return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev, 616f3eb5384SStefan Weinhuber 0, 0, 0, 0, 0); 617f3eb5384SStefan Weinhuber } 618f3eb5384SStefan Weinhuber 6194d284cacSHeiko Carstens static void 620b44b0ab3SStefan Weinhuber locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk, 621b44b0ab3SStefan Weinhuber unsigned int rec_on_trk, int no_rec, int cmd, 6221da177e4SLinus Torvalds struct dasd_device * device, int reclen) 6231da177e4SLinus Torvalds { 6241da177e4SLinus Torvalds struct dasd_eckd_private *private; 6251da177e4SLinus Torvalds int sector; 6261da177e4SLinus Torvalds int dn, d; 6271da177e4SLinus Torvalds 6281da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 6291da177e4SLinus Torvalds 6301da177e4SLinus Torvalds DBF_DEV_EVENT(DBF_INFO, device, 6311da177e4SLinus Torvalds "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", 6321da177e4SLinus Torvalds trk, rec_on_trk, no_rec, cmd, reclen); 6331da177e4SLinus Torvalds 6341da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; 6351da177e4SLinus Torvalds ccw->flags = 0; 6361da177e4SLinus Torvalds ccw->count = 16; 6371da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 6381da177e4SLinus Torvalds 6391da177e4SLinus Torvalds memset(data, 0, sizeof(struct LO_eckd_data)); 6401da177e4SLinus Torvalds sector = 0; 6411da177e4SLinus Torvalds if (rec_on_trk) { 6421da177e4SLinus Torvalds switch (private->rdc_data.dev_type) { 6431da177e4SLinus Torvalds case 0x3390: 6441da177e4SLinus Torvalds dn = ceil_quot(reclen + 6, 232); 6451da177e4SLinus Torvalds d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 6461da177e4SLinus Torvalds sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 6471da177e4SLinus Torvalds break; 6481da177e4SLinus Torvalds case 0x3380: 6491da177e4SLinus Torvalds d = 7 + ceil_quot(reclen + 12, 32); 6501da177e4SLinus Torvalds sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 6511da177e4SLinus Torvalds break; 6521da177e4SLinus Torvalds } 6531da177e4SLinus Torvalds } 6541da177e4SLinus Torvalds data->sector = sector; 6551da177e4SLinus Torvalds data->count = no_rec; 6561da177e4SLinus Torvalds switch (cmd) { 6571da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 6581da177e4SLinus Torvalds data->operation.orientation = 0x3; 6591da177e4SLinus Torvalds data->operation.operation = 0x03; 6601da177e4SLinus Torvalds break; 6611da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 6621da177e4SLinus Torvalds data->operation.orientation = 0x3; 6631da177e4SLinus Torvalds data->operation.operation = 0x16; 6641da177e4SLinus Torvalds break; 6651da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 6661da177e4SLinus Torvalds data->operation.orientation = 0x1; 6671da177e4SLinus Torvalds data->operation.operation = 0x03; 6681da177e4SLinus Torvalds data->count++; 6691da177e4SLinus Torvalds break; 6701da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 6711da177e4SLinus Torvalds data->operation.orientation = 0x3; 6721da177e4SLinus Torvalds data->operation.operation = 0x16; 6731da177e4SLinus Torvalds data->count++; 6741da177e4SLinus Torvalds break; 6751da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 6761da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 6771da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 6781da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 6791da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6801da177e4SLinus Torvalds data->length = reclen; 6811da177e4SLinus Torvalds data->operation.operation = 0x01; 6821da177e4SLinus Torvalds break; 6831da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 6841da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 6851da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6861da177e4SLinus Torvalds data->length = reclen; 6871da177e4SLinus Torvalds data->operation.operation = 0x03; 6881da177e4SLinus Torvalds break; 6891da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 6901da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 6911da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 6921da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 6931da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6941da177e4SLinus Torvalds data->length = reclen; 6951da177e4SLinus Torvalds data->operation.operation = 0x06; 6961da177e4SLinus Torvalds break; 6971da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 6981da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 6991da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 7001da177e4SLinus Torvalds data->length = reclen; 7011da177e4SLinus Torvalds data->operation.operation = 0x16; 7021da177e4SLinus Torvalds break; 7031da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_COUNT: 7041da177e4SLinus Torvalds data->operation.operation = 0x06; 7051da177e4SLinus Torvalds break; 7061da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 7071da177e4SLinus Torvalds data->length = reclen; 7081da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 7091da177e4SLinus Torvalds data->operation.operation = 0x0b; 7101da177e4SLinus Torvalds break; 7111da177e4SLinus Torvalds default: 712fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record " 713fc19f381SStefan Haberland "opcode 0x%x", cmd); 7141da177e4SLinus Torvalds } 715b44b0ab3SStefan Weinhuber set_ch_t(&data->seek_addr, 716b44b0ab3SStefan Weinhuber trk / private->rdc_data.trk_per_cyl, 717b44b0ab3SStefan Weinhuber trk % private->rdc_data.trk_per_cyl); 718b44b0ab3SStefan Weinhuber data->search_arg.cyl = data->seek_addr.cyl; 719b44b0ab3SStefan Weinhuber data->search_arg.head = data->seek_addr.head; 7201da177e4SLinus Torvalds data->search_arg.record = rec_on_trk; 7211da177e4SLinus Torvalds } 7221da177e4SLinus Torvalds 7231da177e4SLinus Torvalds /* 7241da177e4SLinus Torvalds * Returns 1 if the block is one of the special blocks that needs 7251da177e4SLinus Torvalds * to get read/written with the KD variant of the command. 7261da177e4SLinus Torvalds * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and 7271da177e4SLinus Torvalds * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. 7281da177e4SLinus Torvalds * Luckily the KD variants differ only by one bit (0x08) from the 7291da177e4SLinus Torvalds * normal variant. So don't wonder about code like: 7301da177e4SLinus Torvalds * if (dasd_eckd_cdl_special(blk_per_trk, recid)) 7311da177e4SLinus Torvalds * ccw->cmd_code |= 0x8; 7321da177e4SLinus Torvalds */ 7331da177e4SLinus Torvalds static inline int 7341da177e4SLinus Torvalds dasd_eckd_cdl_special(int blk_per_trk, int recid) 7351da177e4SLinus Torvalds { 7361da177e4SLinus Torvalds if (recid < 3) 7371da177e4SLinus Torvalds return 1; 7381da177e4SLinus Torvalds if (recid < blk_per_trk) 7391da177e4SLinus Torvalds return 0; 7401da177e4SLinus Torvalds if (recid < 2 * blk_per_trk) 7411da177e4SLinus Torvalds return 1; 7421da177e4SLinus Torvalds return 0; 7431da177e4SLinus Torvalds } 7441da177e4SLinus Torvalds 7451da177e4SLinus Torvalds /* 7461da177e4SLinus Torvalds * Returns the record size for the special blocks of the cdl format. 7471da177e4SLinus Torvalds * Only returns something useful if dasd_eckd_cdl_special is true 7481da177e4SLinus Torvalds * for the recid. 7491da177e4SLinus Torvalds */ 7501da177e4SLinus Torvalds static inline int 7511da177e4SLinus Torvalds dasd_eckd_cdl_reclen(int recid) 7521da177e4SLinus Torvalds { 7531da177e4SLinus Torvalds if (recid < 3) 7541da177e4SLinus Torvalds return sizes_trk0[recid]; 7551da177e4SLinus Torvalds return LABEL_SIZE; 7561da177e4SLinus Torvalds } 757b206181dSStefan Haberland /* create unique id from private structure. */ 758b206181dSStefan Haberland static void create_uid(struct dasd_eckd_private *private) 7593d052595SHorst Hummel { 7604abb08c2SStefan Weinhuber int count; 761b206181dSStefan Haberland struct dasd_uid *uid; 7623d052595SHorst Hummel 7632dedf0d9SStefan Haberland uid = &private->uid; 7643d052595SHorst Hummel memset(uid, 0, sizeof(struct dasd_uid)); 7654abb08c2SStefan Weinhuber memcpy(uid->vendor, private->ned->HDA_manufacturer, 7663d052595SHorst Hummel sizeof(uid->vendor) - 1); 7673d052595SHorst Hummel EBCASC(uid->vendor, sizeof(uid->vendor) - 1); 7684abb08c2SStefan Weinhuber memcpy(uid->serial, private->ned->HDA_location, 7693d052595SHorst Hummel sizeof(uid->serial) - 1); 7703d052595SHorst Hummel EBCASC(uid->serial, sizeof(uid->serial) - 1); 7714abb08c2SStefan Weinhuber uid->ssid = private->gneq->subsystemID; 772a419aef8SJoe Perches uid->real_unit_addr = private->ned->unit_addr; 7734abb08c2SStefan Weinhuber if (private->sneq) { 7744abb08c2SStefan Weinhuber uid->type = private->sneq->sua_flags; 7758e09f215SStefan Weinhuber if (uid->type == UA_BASE_PAV_ALIAS) 7764abb08c2SStefan Weinhuber uid->base_unit_addr = private->sneq->base_unit_addr; 7778e09f215SStefan Weinhuber } else { 7788e09f215SStefan Weinhuber uid->type = UA_BASE_DEVICE; 7798e09f215SStefan Weinhuber } 7804abb08c2SStefan Weinhuber if (private->vdsneq) { 7814abb08c2SStefan Weinhuber for (count = 0; count < 16; count++) { 7824abb08c2SStefan Weinhuber sprintf(uid->vduit+2*count, "%02x", 7834abb08c2SStefan Weinhuber private->vdsneq->uit[count]); 7844abb08c2SStefan Weinhuber } 7854abb08c2SStefan Weinhuber } 786b206181dSStefan Haberland } 787b206181dSStefan Haberland 788b206181dSStefan Haberland /* 789b206181dSStefan Haberland * Generate device unique id that specifies the physical device. 790b206181dSStefan Haberland */ 791b206181dSStefan Haberland static int dasd_eckd_generate_uid(struct dasd_device *device) 792b206181dSStefan Haberland { 793b206181dSStefan Haberland struct dasd_eckd_private *private; 794b206181dSStefan Haberland unsigned long flags; 795b206181dSStefan Haberland 796b206181dSStefan Haberland private = (struct dasd_eckd_private *) device->private; 797b206181dSStefan Haberland if (!private) 798b206181dSStefan Haberland return -ENODEV; 799b206181dSStefan Haberland if (!private->ned || !private->gneq) 800b206181dSStefan Haberland return -ENODEV; 801b206181dSStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 802b206181dSStefan Haberland create_uid(private); 8032dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 8043d052595SHorst Hummel return 0; 8053d052595SHorst Hummel } 8063d052595SHorst Hummel 8072dedf0d9SStefan Haberland static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid) 8082dedf0d9SStefan Haberland { 8092dedf0d9SStefan Haberland struct dasd_eckd_private *private; 8102dedf0d9SStefan Haberland unsigned long flags; 8112dedf0d9SStefan Haberland 8122dedf0d9SStefan Haberland if (device->private) { 8132dedf0d9SStefan Haberland private = (struct dasd_eckd_private *)device->private; 8142dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 8152dedf0d9SStefan Haberland *uid = private->uid; 8162dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 8172dedf0d9SStefan Haberland return 0; 8182dedf0d9SStefan Haberland } 8192dedf0d9SStefan Haberland return -EINVAL; 8202dedf0d9SStefan Haberland } 8212dedf0d9SStefan Haberland 822b206181dSStefan Haberland /* 823b206181dSStefan Haberland * compare device UID with data of a given dasd_eckd_private structure 824b206181dSStefan Haberland * return 0 for match 825b206181dSStefan Haberland */ 826b206181dSStefan Haberland static int dasd_eckd_compare_path_uid(struct dasd_device *device, 827b206181dSStefan Haberland struct dasd_eckd_private *private) 828b206181dSStefan Haberland { 829b206181dSStefan Haberland struct dasd_uid device_uid; 830b206181dSStefan Haberland 831b206181dSStefan Haberland create_uid(private); 832b206181dSStefan Haberland dasd_eckd_get_uid(device, &device_uid); 833b206181dSStefan Haberland 834b206181dSStefan Haberland return memcmp(&device_uid, &private->uid, sizeof(struct dasd_uid)); 835b206181dSStefan Haberland } 836b206181dSStefan Haberland 837a4d26c6aSStefan Weinhuber static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device, 838a4d26c6aSStefan Weinhuber struct dasd_ccw_req *cqr, 839a4d26c6aSStefan Weinhuber __u8 *rcd_buffer, 840a4d26c6aSStefan Weinhuber __u8 lpm) 84117283b56SCornelia Huck { 84217283b56SCornelia Huck struct ccw1 *ccw; 843a4d26c6aSStefan Weinhuber /* 844a4d26c6aSStefan Weinhuber * buffer has to start with EBCDIC "V1.0" to show 845a4d26c6aSStefan Weinhuber * support for virtual device SNEQ 846a4d26c6aSStefan Weinhuber */ 847a4d26c6aSStefan Weinhuber rcd_buffer[0] = 0xE5; 848a4d26c6aSStefan Weinhuber rcd_buffer[1] = 0xF1; 849a4d26c6aSStefan Weinhuber rcd_buffer[2] = 0x4B; 850a4d26c6aSStefan Weinhuber rcd_buffer[3] = 0xF0; 85117283b56SCornelia Huck 85217283b56SCornelia Huck ccw = cqr->cpaddr; 853a4d26c6aSStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RCD; 854a4d26c6aSStefan Weinhuber ccw->flags = 0; 85517283b56SCornelia Huck ccw->cda = (__u32)(addr_t)rcd_buffer; 856a4d26c6aSStefan Weinhuber ccw->count = DASD_ECKD_RCD_DATA_SIZE; 857a4d26c6aSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 85817283b56SCornelia Huck 8598e09f215SStefan Weinhuber cqr->startdev = device; 8608e09f215SStefan Weinhuber cqr->memdev = device; 8618e09f215SStefan Weinhuber cqr->block = NULL; 86217283b56SCornelia Huck cqr->expires = 10*HZ; 86317283b56SCornelia Huck cqr->lpm = lpm; 864eb6e199bSStefan Weinhuber cqr->retries = 256; 8651aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 86617283b56SCornelia Huck cqr->status = DASD_CQR_FILLED; 867a4d26c6aSStefan Weinhuber set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 868a4d26c6aSStefan Weinhuber } 869a4d26c6aSStefan Weinhuber 8705915a873SStefan Haberland /* 8715915a873SStefan Haberland * Wakeup helper for read_conf 8725915a873SStefan Haberland * if the cqr is not done and needs some error recovery 8735915a873SStefan Haberland * the buffer has to be re-initialized with the EBCDIC "V1.0" 8745915a873SStefan Haberland * to show support for virtual device SNEQ 8755915a873SStefan Haberland */ 8765915a873SStefan Haberland static void read_conf_cb(struct dasd_ccw_req *cqr, void *data) 8775915a873SStefan Haberland { 8785915a873SStefan Haberland struct ccw1 *ccw; 8795915a873SStefan Haberland __u8 *rcd_buffer; 8805915a873SStefan Haberland 8815915a873SStefan Haberland if (cqr->status != DASD_CQR_DONE) { 8825915a873SStefan Haberland ccw = cqr->cpaddr; 8835915a873SStefan Haberland rcd_buffer = (__u8 *)((addr_t) ccw->cda); 8845915a873SStefan Haberland memset(rcd_buffer, 0, sizeof(*rcd_buffer)); 8855915a873SStefan Haberland 8865915a873SStefan Haberland rcd_buffer[0] = 0xE5; 8875915a873SStefan Haberland rcd_buffer[1] = 0xF1; 8885915a873SStefan Haberland rcd_buffer[2] = 0x4B; 8895915a873SStefan Haberland rcd_buffer[3] = 0xF0; 8905915a873SStefan Haberland } 8915915a873SStefan Haberland dasd_wakeup_cb(cqr, data); 8925915a873SStefan Haberland } 8935915a873SStefan Haberland 894a4d26c6aSStefan Weinhuber static int dasd_eckd_read_conf_immediately(struct dasd_device *device, 895a4d26c6aSStefan Weinhuber struct dasd_ccw_req *cqr, 896a4d26c6aSStefan Weinhuber __u8 *rcd_buffer, 897a4d26c6aSStefan Weinhuber __u8 lpm) 898a4d26c6aSStefan Weinhuber { 899a4d26c6aSStefan Weinhuber struct ciw *ciw; 900a4d26c6aSStefan Weinhuber int rc; 901a4d26c6aSStefan Weinhuber /* 902a4d26c6aSStefan Weinhuber * sanity check: scan for RCD command in extended SenseID data 903a4d26c6aSStefan Weinhuber * some devices do not support RCD 904a4d26c6aSStefan Weinhuber */ 905a4d26c6aSStefan Weinhuber ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 906a4d26c6aSStefan Weinhuber if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) 907a4d26c6aSStefan Weinhuber return -EOPNOTSUPP; 908a4d26c6aSStefan Weinhuber 909a4d26c6aSStefan Weinhuber dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm); 910a4d26c6aSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 9115a27e60dSStefan Weinhuber set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 912a4d26c6aSStefan Weinhuber cqr->retries = 5; 9135915a873SStefan Haberland cqr->callback = read_conf_cb; 914a4d26c6aSStefan Weinhuber rc = dasd_sleep_on_immediatly(cqr); 915a4d26c6aSStefan Weinhuber return rc; 91617283b56SCornelia Huck } 91717283b56SCornelia Huck 91817283b56SCornelia Huck static int dasd_eckd_read_conf_lpm(struct dasd_device *device, 91917283b56SCornelia Huck void **rcd_buffer, 92017283b56SCornelia Huck int *rcd_buffer_size, __u8 lpm) 92117283b56SCornelia Huck { 92217283b56SCornelia Huck struct ciw *ciw; 92317283b56SCornelia Huck char *rcd_buf = NULL; 92417283b56SCornelia Huck int ret; 92517283b56SCornelia Huck struct dasd_ccw_req *cqr; 92617283b56SCornelia Huck 92717283b56SCornelia Huck /* 928a4d26c6aSStefan Weinhuber * sanity check: scan for RCD command in extended SenseID data 929a4d26c6aSStefan Weinhuber * some devices do not support RCD 93017283b56SCornelia Huck */ 93117283b56SCornelia Huck ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 932a4d26c6aSStefan Weinhuber if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) { 93317283b56SCornelia Huck ret = -EOPNOTSUPP; 93417283b56SCornelia Huck goto out_error; 93517283b56SCornelia Huck } 936a4d26c6aSStefan Weinhuber rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA); 93717283b56SCornelia Huck if (!rcd_buf) { 93817283b56SCornelia Huck ret = -ENOMEM; 93917283b56SCornelia Huck goto out_error; 94017283b56SCornelia Huck } 941a4d26c6aSStefan Weinhuber cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, 942a4d26c6aSStefan Weinhuber 0, /* use rcd_buf as data ara */ 943a4d26c6aSStefan Weinhuber device); 94417283b56SCornelia Huck if (IS_ERR(cqr)) { 945a4d26c6aSStefan Weinhuber DBF_DEV_EVENT(DBF_WARNING, device, "%s", 946a4d26c6aSStefan Weinhuber "Could not allocate RCD request"); 947a4d26c6aSStefan Weinhuber ret = -ENOMEM; 94817283b56SCornelia Huck goto out_error; 94917283b56SCornelia Huck } 950a4d26c6aSStefan Weinhuber dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm); 9515915a873SStefan Haberland cqr->callback = read_conf_cb; 95217283b56SCornelia Huck ret = dasd_sleep_on(cqr); 95317283b56SCornelia Huck /* 95417283b56SCornelia Huck * on success we update the user input parms 95517283b56SCornelia Huck */ 9568e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 95717283b56SCornelia Huck if (ret) 95817283b56SCornelia Huck goto out_error; 95917283b56SCornelia Huck 960a4d26c6aSStefan Weinhuber *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE; 96117283b56SCornelia Huck *rcd_buffer = rcd_buf; 96217283b56SCornelia Huck return 0; 96317283b56SCornelia Huck out_error: 96417283b56SCornelia Huck kfree(rcd_buf); 96517283b56SCornelia Huck *rcd_buffer = NULL; 96617283b56SCornelia Huck *rcd_buffer_size = 0; 96717283b56SCornelia Huck return ret; 96817283b56SCornelia Huck } 96917283b56SCornelia Huck 9704abb08c2SStefan Weinhuber static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private) 9714abb08c2SStefan Weinhuber { 9724abb08c2SStefan Weinhuber 9734abb08c2SStefan Weinhuber struct dasd_sneq *sneq; 9744abb08c2SStefan Weinhuber int i, count; 9754abb08c2SStefan Weinhuber 9764abb08c2SStefan Weinhuber private->ned = NULL; 9774abb08c2SStefan Weinhuber private->sneq = NULL; 9784abb08c2SStefan Weinhuber private->vdsneq = NULL; 9794abb08c2SStefan Weinhuber private->gneq = NULL; 9804abb08c2SStefan Weinhuber count = private->conf_len / sizeof(struct dasd_sneq); 9814abb08c2SStefan Weinhuber sneq = (struct dasd_sneq *)private->conf_data; 9824abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 9834abb08c2SStefan Weinhuber if (sneq->flags.identifier == 1 && sneq->format == 1) 9844abb08c2SStefan Weinhuber private->sneq = sneq; 9854abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 1 && sneq->format == 4) 9864abb08c2SStefan Weinhuber private->vdsneq = (struct vd_sneq *)sneq; 9874abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 2) 9884abb08c2SStefan Weinhuber private->gneq = (struct dasd_gneq *)sneq; 9894abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 3 && sneq->res1 == 1) 9904abb08c2SStefan Weinhuber private->ned = (struct dasd_ned *)sneq; 9914abb08c2SStefan Weinhuber sneq++; 9924abb08c2SStefan Weinhuber } 9934abb08c2SStefan Weinhuber if (!private->ned || !private->gneq) { 9944abb08c2SStefan Weinhuber private->ned = NULL; 9954abb08c2SStefan Weinhuber private->sneq = NULL; 9964abb08c2SStefan Weinhuber private->vdsneq = NULL; 9974abb08c2SStefan Weinhuber private->gneq = NULL; 9984abb08c2SStefan Weinhuber return -EINVAL; 9994abb08c2SStefan Weinhuber } 10004abb08c2SStefan Weinhuber return 0; 10014abb08c2SStefan Weinhuber 10024abb08c2SStefan Weinhuber }; 10034abb08c2SStefan Weinhuber 10044abb08c2SStefan Weinhuber static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len) 10054abb08c2SStefan Weinhuber { 10064abb08c2SStefan Weinhuber struct dasd_gneq *gneq; 10074abb08c2SStefan Weinhuber int i, count, found; 10084abb08c2SStefan Weinhuber 10094abb08c2SStefan Weinhuber count = conf_len / sizeof(*gneq); 10104abb08c2SStefan Weinhuber gneq = (struct dasd_gneq *)conf_data; 10114abb08c2SStefan Weinhuber found = 0; 10124abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 10134abb08c2SStefan Weinhuber if (gneq->flags.identifier == 2) { 10144abb08c2SStefan Weinhuber found = 1; 10154abb08c2SStefan Weinhuber break; 10164abb08c2SStefan Weinhuber } 10174abb08c2SStefan Weinhuber gneq++; 10184abb08c2SStefan Weinhuber } 10194abb08c2SStefan Weinhuber if (found) 10204abb08c2SStefan Weinhuber return ((char *)gneq)[18] & 0x07; 10214abb08c2SStefan Weinhuber else 10224abb08c2SStefan Weinhuber return 0; 10234abb08c2SStefan Weinhuber } 10244abb08c2SStefan Weinhuber 10254abb08c2SStefan Weinhuber static int dasd_eckd_read_conf(struct dasd_device *device) 10261da177e4SLinus Torvalds { 10271da177e4SLinus Torvalds void *conf_data; 10281da177e4SLinus Torvalds int conf_len, conf_data_saved; 102955d3a85cSStefan Haberland int rc, path_err; 1030a4d26c6aSStefan Weinhuber __u8 lpm, opm; 1031b206181dSStefan Haberland struct dasd_eckd_private *private, path_private; 1032a4d26c6aSStefan Weinhuber struct dasd_path *path_data; 1033b206181dSStefan Haberland struct dasd_uid *uid; 1034b206181dSStefan Haberland char print_path_uid[60], print_device_uid[60]; 10351da177e4SLinus Torvalds 10361da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 1037a4d26c6aSStefan Weinhuber path_data = &device->path_data; 1038a4d26c6aSStefan Weinhuber opm = ccw_device_get_path_mask(device->cdev); 10391da177e4SLinus Torvalds conf_data_saved = 0; 104055d3a85cSStefan Haberland path_err = 0; 10411da177e4SLinus Torvalds /* get configuration data per operational path */ 10421da177e4SLinus Torvalds for (lpm = 0x80; lpm; lpm>>= 1) { 1043b206181dSStefan Haberland if (!(lpm & opm)) 1044b206181dSStefan Haberland continue; 104517283b56SCornelia Huck rc = dasd_eckd_read_conf_lpm(device, &conf_data, 10461da177e4SLinus Torvalds &conf_len, lpm); 10471da177e4SLinus Torvalds if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ 1048b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 10491da177e4SLinus Torvalds "Read configuration data returned " 1050b8ed5dd5SStefan Haberland "error %d", rc); 10511da177e4SLinus Torvalds return rc; 10521da177e4SLinus Torvalds } 10531da177e4SLinus Torvalds if (conf_data == NULL) { 1054b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1055b8ed5dd5SStefan Haberland "No configuration data " 1056b8ed5dd5SStefan Haberland "retrieved"); 1057a4d26c6aSStefan Weinhuber /* no further analysis possible */ 1058a4d26c6aSStefan Weinhuber path_data->opm |= lpm; 1059d133a960SGabriel Craciunescu continue; /* no error */ 10601da177e4SLinus Torvalds } 10611da177e4SLinus Torvalds /* save first valid configuration data */ 10621da177e4SLinus Torvalds if (!conf_data_saved) { 10634abb08c2SStefan Weinhuber kfree(private->conf_data); 10644abb08c2SStefan Weinhuber private->conf_data = conf_data; 10654abb08c2SStefan Weinhuber private->conf_len = conf_len; 10664abb08c2SStefan Weinhuber if (dasd_eckd_identify_conf_parts(private)) { 10674abb08c2SStefan Weinhuber private->conf_data = NULL; 10684abb08c2SStefan Weinhuber private->conf_len = 0; 10694abb08c2SStefan Weinhuber kfree(conf_data); 10704abb08c2SStefan Weinhuber continue; 10714abb08c2SStefan Weinhuber } 1072b206181dSStefan Haberland /* 1073b206181dSStefan Haberland * build device UID that other path data 1074b206181dSStefan Haberland * can be compared to it 1075b206181dSStefan Haberland */ 1076b206181dSStefan Haberland dasd_eckd_generate_uid(device); 10771da177e4SLinus Torvalds conf_data_saved++; 1078b206181dSStefan Haberland } else { 1079b206181dSStefan Haberland path_private.conf_data = conf_data; 1080b206181dSStefan Haberland path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1081b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts( 1082b206181dSStefan Haberland &path_private)) { 1083b206181dSStefan Haberland path_private.conf_data = NULL; 1084b206181dSStefan Haberland path_private.conf_len = 0; 1085b206181dSStefan Haberland kfree(conf_data); 1086b206181dSStefan Haberland continue; 1087b206181dSStefan Haberland } 1088b206181dSStefan Haberland 1089b206181dSStefan Haberland if (dasd_eckd_compare_path_uid( 1090b206181dSStefan Haberland device, &path_private)) { 1091b206181dSStefan Haberland uid = &path_private.uid; 1092b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1093b206181dSStefan Haberland snprintf(print_path_uid, 1094b206181dSStefan Haberland sizeof(print_path_uid), 1095b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1096b206181dSStefan Haberland uid->vendor, uid->serial, 1097b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1098b206181dSStefan Haberland uid->vduit); 1099b206181dSStefan Haberland else 1100b206181dSStefan Haberland snprintf(print_path_uid, 1101b206181dSStefan Haberland sizeof(print_path_uid), 1102b206181dSStefan Haberland "%s.%s.%04x.%02x", 1103b206181dSStefan Haberland uid->vendor, uid->serial, 1104b206181dSStefan Haberland uid->ssid, 1105b206181dSStefan Haberland uid->real_unit_addr); 1106b206181dSStefan Haberland uid = &private->uid; 1107b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1108b206181dSStefan Haberland snprintf(print_device_uid, 1109b206181dSStefan Haberland sizeof(print_device_uid), 1110b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1111b206181dSStefan Haberland uid->vendor, uid->serial, 1112b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1113b206181dSStefan Haberland uid->vduit); 1114b206181dSStefan Haberland else 1115b206181dSStefan Haberland snprintf(print_device_uid, 1116b206181dSStefan Haberland sizeof(print_device_uid), 1117b206181dSStefan Haberland "%s.%s.%04x.%02x", 1118b206181dSStefan Haberland uid->vendor, uid->serial, 1119b206181dSStefan Haberland uid->ssid, 1120b206181dSStefan Haberland uid->real_unit_addr); 1121b206181dSStefan Haberland dev_err(&device->cdev->dev, 1122b206181dSStefan Haberland "Not all channel paths lead to " 1123b206181dSStefan Haberland "the same device, path %02X leads to " 1124b206181dSStefan Haberland "device %s instead of %s\n", lpm, 1125b206181dSStefan Haberland print_path_uid, print_device_uid); 112655d3a85cSStefan Haberland path_err = -EINVAL; 112755d3a85cSStefan Haberland continue; 1128b206181dSStefan Haberland } 1129b206181dSStefan Haberland 1130b206181dSStefan Haberland path_private.conf_data = NULL; 1131b206181dSStefan Haberland path_private.conf_len = 0; 11321da177e4SLinus Torvalds } 11334abb08c2SStefan Weinhuber switch (dasd_eckd_path_access(conf_data, conf_len)) { 11341da177e4SLinus Torvalds case 0x02: 11351da177e4SLinus Torvalds path_data->npm |= lpm; 11361da177e4SLinus Torvalds break; 11371da177e4SLinus Torvalds case 0x03: 11381da177e4SLinus Torvalds path_data->ppm |= lpm; 11391da177e4SLinus Torvalds break; 11401da177e4SLinus Torvalds } 1141a4d26c6aSStefan Weinhuber path_data->opm |= lpm; 1142b206181dSStefan Haberland 11434abb08c2SStefan Weinhuber if (conf_data != private->conf_data) 11441da177e4SLinus Torvalds kfree(conf_data); 11451da177e4SLinus Torvalds } 1146b206181dSStefan Haberland 114755d3a85cSStefan Haberland return path_err; 11481da177e4SLinus Torvalds } 11491da177e4SLinus Torvalds 1150a4d26c6aSStefan Weinhuber static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm) 1151a4d26c6aSStefan Weinhuber { 1152a4d26c6aSStefan Weinhuber struct dasd_eckd_private *private; 1153a4d26c6aSStefan Weinhuber int mdc; 1154a4d26c6aSStefan Weinhuber u32 fcx_max_data; 1155a4d26c6aSStefan Weinhuber 1156a4d26c6aSStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 1157a4d26c6aSStefan Weinhuber if (private->fcx_max_data) { 1158a4d26c6aSStefan Weinhuber mdc = ccw_device_get_mdc(device->cdev, lpm); 1159a4d26c6aSStefan Weinhuber if ((mdc < 0)) { 1160a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1161a4d26c6aSStefan Weinhuber "Detecting the maximum data size for zHPF " 1162a4d26c6aSStefan Weinhuber "requests failed (rc=%d) for a new path %x\n", 1163a4d26c6aSStefan Weinhuber mdc, lpm); 1164a4d26c6aSStefan Weinhuber return mdc; 1165a4d26c6aSStefan Weinhuber } 1166a4d26c6aSStefan Weinhuber fcx_max_data = mdc * FCX_MAX_DATA_FACTOR; 1167a4d26c6aSStefan Weinhuber if (fcx_max_data < private->fcx_max_data) { 1168a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1169a4d26c6aSStefan Weinhuber "The maximum data size for zHPF requests %u " 1170a4d26c6aSStefan Weinhuber "on a new path %x is below the active maximum " 1171a4d26c6aSStefan Weinhuber "%u\n", fcx_max_data, lpm, 1172a4d26c6aSStefan Weinhuber private->fcx_max_data); 1173a4d26c6aSStefan Weinhuber return -EACCES; 1174a4d26c6aSStefan Weinhuber } 1175a4d26c6aSStefan Weinhuber } 1176a4d26c6aSStefan Weinhuber return 0; 1177a4d26c6aSStefan Weinhuber } 1178a4d26c6aSStefan Weinhuber 1179b206181dSStefan Haberland static int rebuild_device_uid(struct dasd_device *device, 1180b206181dSStefan Haberland struct path_verification_work_data *data) 1181b206181dSStefan Haberland { 1182b206181dSStefan Haberland struct dasd_eckd_private *private; 1183b206181dSStefan Haberland struct dasd_path *path_data; 1184b206181dSStefan Haberland __u8 lpm, opm; 1185b206181dSStefan Haberland int rc; 1186b206181dSStefan Haberland 1187b206181dSStefan Haberland rc = -ENODEV; 1188b206181dSStefan Haberland private = (struct dasd_eckd_private *) device->private; 1189b206181dSStefan Haberland path_data = &device->path_data; 1190b206181dSStefan Haberland opm = device->path_data.opm; 1191b206181dSStefan Haberland 1192b206181dSStefan Haberland for (lpm = 0x80; lpm; lpm >>= 1) { 1193b206181dSStefan Haberland if (!(lpm & opm)) 1194b206181dSStefan Haberland continue; 1195b206181dSStefan Haberland memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1196b206181dSStefan Haberland memset(&data->cqr, 0, sizeof(data->cqr)); 1197b206181dSStefan Haberland data->cqr.cpaddr = &data->ccw; 1198b206181dSStefan Haberland rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1199b206181dSStefan Haberland data->rcd_buffer, 1200b206181dSStefan Haberland lpm); 1201b206181dSStefan Haberland 1202b206181dSStefan Haberland if (rc) { 1203b206181dSStefan Haberland if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */ 1204b206181dSStefan Haberland continue; 1205b206181dSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1206b206181dSStefan Haberland "Read configuration data " 1207b206181dSStefan Haberland "returned error %d", rc); 1208b206181dSStefan Haberland break; 1209b206181dSStefan Haberland } 1210b206181dSStefan Haberland memcpy(private->conf_data, data->rcd_buffer, 1211b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE); 1212b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts(private)) { 1213b206181dSStefan Haberland rc = -ENODEV; 1214b206181dSStefan Haberland } else /* first valid path is enough */ 1215b206181dSStefan Haberland break; 1216b206181dSStefan Haberland } 1217b206181dSStefan Haberland 1218b206181dSStefan Haberland if (!rc) 1219b206181dSStefan Haberland rc = dasd_eckd_generate_uid(device); 1220b206181dSStefan Haberland 1221b206181dSStefan Haberland return rc; 1222b206181dSStefan Haberland } 1223b206181dSStefan Haberland 1224a4d26c6aSStefan Weinhuber static void do_path_verification_work(struct work_struct *work) 1225a4d26c6aSStefan Weinhuber { 1226a4d26c6aSStefan Weinhuber struct path_verification_work_data *data; 1227a4d26c6aSStefan Weinhuber struct dasd_device *device; 1228b206181dSStefan Haberland struct dasd_eckd_private path_private; 1229b206181dSStefan Haberland struct dasd_uid *uid; 1230b206181dSStefan Haberland __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE]; 1231a4d26c6aSStefan Weinhuber __u8 lpm, opm, npm, ppm, epm; 1232a4d26c6aSStefan Weinhuber unsigned long flags; 1233b206181dSStefan Haberland char print_uid[60]; 1234a4d26c6aSStefan Weinhuber int rc; 1235a4d26c6aSStefan Weinhuber 1236a4d26c6aSStefan Weinhuber data = container_of(work, struct path_verification_work_data, worker); 1237a4d26c6aSStefan Weinhuber device = data->device; 1238a4d26c6aSStefan Weinhuber 1239c8d1c0ffSStefan Haberland /* delay path verification until device was resumed */ 1240c8d1c0ffSStefan Haberland if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 1241c8d1c0ffSStefan Haberland schedule_work(work); 1242c8d1c0ffSStefan Haberland return; 1243c8d1c0ffSStefan Haberland } 1244c8d1c0ffSStefan Haberland 1245a4d26c6aSStefan Weinhuber opm = 0; 1246a4d26c6aSStefan Weinhuber npm = 0; 1247a4d26c6aSStefan Weinhuber ppm = 0; 1248a4d26c6aSStefan Weinhuber epm = 0; 1249a4d26c6aSStefan Weinhuber for (lpm = 0x80; lpm; lpm >>= 1) { 1250b206181dSStefan Haberland if (!(lpm & data->tbvpm)) 1251b206181dSStefan Haberland continue; 1252b206181dSStefan Haberland memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1253a4d26c6aSStefan Weinhuber memset(&data->cqr, 0, sizeof(data->cqr)); 1254a4d26c6aSStefan Weinhuber data->cqr.cpaddr = &data->ccw; 1255a4d26c6aSStefan Weinhuber rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1256a4d26c6aSStefan Weinhuber data->rcd_buffer, 1257a4d26c6aSStefan Weinhuber lpm); 1258a4d26c6aSStefan Weinhuber if (!rc) { 1259a4d26c6aSStefan Weinhuber switch (dasd_eckd_path_access(data->rcd_buffer, 1260b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE) 1261b206181dSStefan Haberland ) { 1262a4d26c6aSStefan Weinhuber case 0x02: 1263a4d26c6aSStefan Weinhuber npm |= lpm; 1264a4d26c6aSStefan Weinhuber break; 1265a4d26c6aSStefan Weinhuber case 0x03: 1266a4d26c6aSStefan Weinhuber ppm |= lpm; 1267a4d26c6aSStefan Weinhuber break; 1268a4d26c6aSStefan Weinhuber } 1269a4d26c6aSStefan Weinhuber opm |= lpm; 1270a4d26c6aSStefan Weinhuber } else if (rc == -EOPNOTSUPP) { 1271a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1272a4d26c6aSStefan Weinhuber "path verification: No configuration " 1273a4d26c6aSStefan Weinhuber "data retrieved"); 1274a4d26c6aSStefan Weinhuber opm |= lpm; 1275a4d26c6aSStefan Weinhuber } else if (rc == -EAGAIN) { 1276a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1277a4d26c6aSStefan Weinhuber "path verification: device is stopped," 1278a4d26c6aSStefan Weinhuber " try again later"); 1279a4d26c6aSStefan Weinhuber epm |= lpm; 1280a4d26c6aSStefan Weinhuber } else { 1281a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1282a4d26c6aSStefan Weinhuber "Reading device feature codes failed " 1283a4d26c6aSStefan Weinhuber "(rc=%d) for new path %x\n", rc, lpm); 1284a4d26c6aSStefan Weinhuber continue; 1285a4d26c6aSStefan Weinhuber } 1286a4d26c6aSStefan Weinhuber if (verify_fcx_max_data(device, lpm)) { 1287a4d26c6aSStefan Weinhuber opm &= ~lpm; 1288a4d26c6aSStefan Weinhuber npm &= ~lpm; 1289a4d26c6aSStefan Weinhuber ppm &= ~lpm; 1290b206181dSStefan Haberland continue; 1291b206181dSStefan Haberland } 1292b206181dSStefan Haberland 1293b206181dSStefan Haberland /* 1294b206181dSStefan Haberland * save conf_data for comparison after 1295b206181dSStefan Haberland * rebuild_device_uid may have changed 1296b206181dSStefan Haberland * the original data 1297b206181dSStefan Haberland */ 1298b206181dSStefan Haberland memcpy(&path_rcd_buf, data->rcd_buffer, 1299b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE); 1300b206181dSStefan Haberland path_private.conf_data = (void *) &path_rcd_buf; 1301b206181dSStefan Haberland path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1302b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts(&path_private)) { 1303b206181dSStefan Haberland path_private.conf_data = NULL; 1304b206181dSStefan Haberland path_private.conf_len = 0; 1305b206181dSStefan Haberland continue; 1306b206181dSStefan Haberland } 1307b206181dSStefan Haberland 1308b206181dSStefan Haberland /* 1309b206181dSStefan Haberland * compare path UID with device UID only if at least 1310b206181dSStefan Haberland * one valid path is left 1311b206181dSStefan Haberland * in other case the device UID may have changed and 1312b206181dSStefan Haberland * the first working path UID will be used as device UID 1313b206181dSStefan Haberland */ 1314b206181dSStefan Haberland if (device->path_data.opm && 1315b206181dSStefan Haberland dasd_eckd_compare_path_uid(device, &path_private)) { 1316b206181dSStefan Haberland /* 1317b206181dSStefan Haberland * the comparison was not successful 1318b206181dSStefan Haberland * rebuild the device UID with at least one 1319b206181dSStefan Haberland * known path in case a z/VM hyperswap command 1320b206181dSStefan Haberland * has changed the device 1321b206181dSStefan Haberland * 1322b206181dSStefan Haberland * after this compare again 1323b206181dSStefan Haberland * 1324b206181dSStefan Haberland * if either the rebuild or the recompare fails 1325b206181dSStefan Haberland * the path can not be used 1326b206181dSStefan Haberland */ 1327b206181dSStefan Haberland if (rebuild_device_uid(device, data) || 1328b206181dSStefan Haberland dasd_eckd_compare_path_uid( 1329b206181dSStefan Haberland device, &path_private)) { 1330b206181dSStefan Haberland uid = &path_private.uid; 1331b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1332b206181dSStefan Haberland snprintf(print_uid, sizeof(print_uid), 1333b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1334b206181dSStefan Haberland uid->vendor, uid->serial, 1335b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1336b206181dSStefan Haberland uid->vduit); 1337b206181dSStefan Haberland else 1338b206181dSStefan Haberland snprintf(print_uid, sizeof(print_uid), 1339b206181dSStefan Haberland "%s.%s.%04x.%02x", 1340b206181dSStefan Haberland uid->vendor, uid->serial, 1341b206181dSStefan Haberland uid->ssid, 1342b206181dSStefan Haberland uid->real_unit_addr); 1343b206181dSStefan Haberland dev_err(&device->cdev->dev, 1344b206181dSStefan Haberland "The newly added channel path %02X " 1345b206181dSStefan Haberland "will not be used because it leads " 1346b206181dSStefan Haberland "to a different device %s\n", 1347b206181dSStefan Haberland lpm, print_uid); 1348b206181dSStefan Haberland opm &= ~lpm; 1349b206181dSStefan Haberland npm &= ~lpm; 1350b206181dSStefan Haberland ppm &= ~lpm; 1351b206181dSStefan Haberland continue; 1352a4d26c6aSStefan Weinhuber } 1353a4d26c6aSStefan Weinhuber } 1354b206181dSStefan Haberland 1355a4d26c6aSStefan Weinhuber /* 1356a4d26c6aSStefan Weinhuber * There is a small chance that a path is lost again between 1357a4d26c6aSStefan Weinhuber * above path verification and the following modification of 1358a4d26c6aSStefan Weinhuber * the device opm mask. We could avoid that race here by using 1359a4d26c6aSStefan Weinhuber * yet another path mask, but we rather deal with this unlikely 1360a4d26c6aSStefan Weinhuber * situation in dasd_start_IO. 1361a4d26c6aSStefan Weinhuber */ 1362a4d26c6aSStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1363a4d26c6aSStefan Weinhuber if (!device->path_data.opm && opm) { 1364a4d26c6aSStefan Weinhuber device->path_data.opm = opm; 1365a4d26c6aSStefan Weinhuber dasd_generic_path_operational(device); 1366a4d26c6aSStefan Weinhuber } else 1367a4d26c6aSStefan Weinhuber device->path_data.opm |= opm; 1368a4d26c6aSStefan Weinhuber device->path_data.npm |= npm; 1369a4d26c6aSStefan Weinhuber device->path_data.ppm |= ppm; 1370a4d26c6aSStefan Weinhuber device->path_data.tbvpm |= epm; 1371a4d26c6aSStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1372b206181dSStefan Haberland } 1373a4d26c6aSStefan Weinhuber 1374a4d26c6aSStefan Weinhuber dasd_put_device(device); 1375a4d26c6aSStefan Weinhuber if (data->isglobal) 1376a4d26c6aSStefan Weinhuber mutex_unlock(&dasd_path_verification_mutex); 1377a4d26c6aSStefan Weinhuber else 1378a4d26c6aSStefan Weinhuber kfree(data); 1379a4d26c6aSStefan Weinhuber } 1380a4d26c6aSStefan Weinhuber 1381a4d26c6aSStefan Weinhuber static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm) 1382a4d26c6aSStefan Weinhuber { 1383a4d26c6aSStefan Weinhuber struct path_verification_work_data *data; 1384a4d26c6aSStefan Weinhuber 1385a4d26c6aSStefan Weinhuber data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA); 1386a4d26c6aSStefan Weinhuber if (!data) { 1387a4d26c6aSStefan Weinhuber if (mutex_trylock(&dasd_path_verification_mutex)) { 1388a4d26c6aSStefan Weinhuber data = path_verification_worker; 1389a4d26c6aSStefan Weinhuber data->isglobal = 1; 1390a4d26c6aSStefan Weinhuber } else 1391a4d26c6aSStefan Weinhuber return -ENOMEM; 1392a4d26c6aSStefan Weinhuber } else { 1393a4d26c6aSStefan Weinhuber memset(data, 0, sizeof(*data)); 1394a4d26c6aSStefan Weinhuber data->isglobal = 0; 1395a4d26c6aSStefan Weinhuber } 1396a4d26c6aSStefan Weinhuber INIT_WORK(&data->worker, do_path_verification_work); 1397a4d26c6aSStefan Weinhuber dasd_get_device(device); 1398a4d26c6aSStefan Weinhuber data->device = device; 1399a4d26c6aSStefan Weinhuber data->tbvpm = lpm; 1400a4d26c6aSStefan Weinhuber schedule_work(&data->worker); 1401a4d26c6aSStefan Weinhuber return 0; 1402a4d26c6aSStefan Weinhuber } 1403a4d26c6aSStefan Weinhuber 14048e09f215SStefan Weinhuber static int dasd_eckd_read_features(struct dasd_device *device) 14058e09f215SStefan Weinhuber { 14068e09f215SStefan Weinhuber struct dasd_psf_prssd_data *prssdp; 14078e09f215SStefan Weinhuber struct dasd_rssd_features *features; 14088e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 14098e09f215SStefan Weinhuber struct ccw1 *ccw; 14108e09f215SStefan Weinhuber int rc; 14118e09f215SStefan Weinhuber struct dasd_eckd_private *private; 14128e09f215SStefan Weinhuber 14138e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 141468d1e5f0SStefan Weinhuber memset(&private->features, 0, sizeof(struct dasd_rssd_features)); 141568b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 14168e09f215SStefan Weinhuber (sizeof(struct dasd_psf_prssd_data) + 14178e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)), 14188e09f215SStefan Weinhuber device); 14198e09f215SStefan Weinhuber if (IS_ERR(cqr)) { 1420b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " 1421b8ed5dd5SStefan Haberland "allocate initialization request"); 14228e09f215SStefan Weinhuber return PTR_ERR(cqr); 14238e09f215SStefan Weinhuber } 14248e09f215SStefan Weinhuber cqr->startdev = device; 14258e09f215SStefan Weinhuber cqr->memdev = device; 14268e09f215SStefan Weinhuber cqr->block = NULL; 1427eb6e199bSStefan Weinhuber cqr->retries = 256; 14288e09f215SStefan Weinhuber cqr->expires = 10 * HZ; 14298e09f215SStefan Weinhuber 14308e09f215SStefan Weinhuber /* Prepare for Read Subsystem Data */ 14318e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 14328e09f215SStefan Weinhuber memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 14338e09f215SStefan Weinhuber prssdp->order = PSF_ORDER_PRSSD; 14348e09f215SStefan Weinhuber prssdp->suborder = 0x41; /* Read Feature Codes */ 14358e09f215SStefan Weinhuber /* all other bytes of prssdp must be zero */ 14368e09f215SStefan Weinhuber 14378e09f215SStefan Weinhuber ccw = cqr->cpaddr; 14388e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PSF; 14398e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_psf_prssd_data); 14408e09f215SStefan Weinhuber ccw->flags |= CCW_FLAG_CC; 14418e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) prssdp; 14428e09f215SStefan Weinhuber 14438e09f215SStefan Weinhuber /* Read Subsystem Data - feature codes */ 14448e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 14458e09f215SStefan Weinhuber memset(features, 0, sizeof(struct dasd_rssd_features)); 14468e09f215SStefan Weinhuber 14478e09f215SStefan Weinhuber ccw++; 14488e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RSSD; 14498e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_rssd_features); 14508e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) features; 14518e09f215SStefan Weinhuber 14521aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 14538e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 14548e09f215SStefan Weinhuber rc = dasd_sleep_on(cqr); 14558e09f215SStefan Weinhuber if (rc == 0) { 14568e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 14578e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 14588e09f215SStefan Weinhuber memcpy(&private->features, features, 14598e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)); 146068d1e5f0SStefan Weinhuber } else 146168d1e5f0SStefan Weinhuber dev_warn(&device->cdev->dev, "Reading device feature codes" 146268d1e5f0SStefan Weinhuber " failed with rc=%d\n", rc); 14638e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 14648e09f215SStefan Weinhuber return rc; 14658e09f215SStefan Weinhuber } 14668e09f215SStefan Weinhuber 14678e09f215SStefan Weinhuber 14683d052595SHorst Hummel /* 146940545573SHorst Hummel * Build CP for Perform Subsystem Function - SSC. 147040545573SHorst Hummel */ 1471f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, 1472f3eb5384SStefan Weinhuber int enable_pav) 147340545573SHorst Hummel { 147440545573SHorst Hummel struct dasd_ccw_req *cqr; 147540545573SHorst Hummel struct dasd_psf_ssc_data *psf_ssc_data; 147640545573SHorst Hummel struct ccw1 *ccw; 147740545573SHorst Hummel 147868b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 147940545573SHorst Hummel sizeof(struct dasd_psf_ssc_data), 148040545573SHorst Hummel device); 148140545573SHorst Hummel 148240545573SHorst Hummel if (IS_ERR(cqr)) { 1483fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 148440545573SHorst Hummel "Could not allocate PSF-SSC request"); 148540545573SHorst Hummel return cqr; 148640545573SHorst Hummel } 148740545573SHorst Hummel psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 148840545573SHorst Hummel psf_ssc_data->order = PSF_ORDER_SSC; 1489626350b6SStefan Weinhuber psf_ssc_data->suborder = 0xc0; 1490f3eb5384SStefan Weinhuber if (enable_pav) { 1491626350b6SStefan Weinhuber psf_ssc_data->suborder |= 0x08; 14928e09f215SStefan Weinhuber psf_ssc_data->reserved[0] = 0x88; 1493f3eb5384SStefan Weinhuber } 149440545573SHorst Hummel ccw = cqr->cpaddr; 149540545573SHorst Hummel ccw->cmd_code = DASD_ECKD_CCW_PSF; 149640545573SHorst Hummel ccw->cda = (__u32)(addr_t)psf_ssc_data; 149740545573SHorst Hummel ccw->count = 66; 149840545573SHorst Hummel 14998e09f215SStefan Weinhuber cqr->startdev = device; 15008e09f215SStefan Weinhuber cqr->memdev = device; 15018e09f215SStefan Weinhuber cqr->block = NULL; 1502eb6e199bSStefan Weinhuber cqr->retries = 256; 150340545573SHorst Hummel cqr->expires = 10*HZ; 15041aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 150540545573SHorst Hummel cqr->status = DASD_CQR_FILLED; 150640545573SHorst Hummel return cqr; 150740545573SHorst Hummel } 150840545573SHorst Hummel 150940545573SHorst Hummel /* 151040545573SHorst Hummel * Perform Subsystem Function. 151140545573SHorst Hummel * It is necessary to trigger CIO for channel revalidation since this 151240545573SHorst Hummel * call might change behaviour of DASD devices. 151340545573SHorst Hummel */ 151440545573SHorst Hummel static int 151512d7b107SStefan Haberland dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav, 151612d7b107SStefan Haberland unsigned long flags) 151740545573SHorst Hummel { 151840545573SHorst Hummel struct dasd_ccw_req *cqr; 151940545573SHorst Hummel int rc; 152040545573SHorst Hummel 1521f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_psf_ssc(device, enable_pav); 152240545573SHorst Hummel if (IS_ERR(cqr)) 152340545573SHorst Hummel return PTR_ERR(cqr); 152440545573SHorst Hummel 152512d7b107SStefan Haberland /* 152612d7b107SStefan Haberland * set flags e.g. turn on failfast, to prevent blocking 152712d7b107SStefan Haberland * the calling function should handle failed requests 152812d7b107SStefan Haberland */ 152912d7b107SStefan Haberland cqr->flags |= flags; 153012d7b107SStefan Haberland 153140545573SHorst Hummel rc = dasd_sleep_on(cqr); 153240545573SHorst Hummel if (!rc) 153340545573SHorst Hummel /* trigger CIO to reprobe devices */ 153440545573SHorst Hummel css_schedule_reprobe(); 153512d7b107SStefan Haberland else if (cqr->intrc == -EAGAIN) 153612d7b107SStefan Haberland rc = -EAGAIN; 153712d7b107SStefan Haberland 15388e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 153940545573SHorst Hummel return rc; 154040545573SHorst Hummel } 154140545573SHorst Hummel 154240545573SHorst Hummel /* 154340545573SHorst Hummel * Valide storage server of current device. 154440545573SHorst Hummel */ 154512d7b107SStefan Haberland static int dasd_eckd_validate_server(struct dasd_device *device, 154612d7b107SStefan Haberland unsigned long flags) 154740545573SHorst Hummel { 154840545573SHorst Hummel int rc; 15498e09f215SStefan Weinhuber struct dasd_eckd_private *private; 1550f3eb5384SStefan Weinhuber int enable_pav; 155140545573SHorst Hummel 1552f9f8d02fSStefan Haberland private = (struct dasd_eckd_private *) device->private; 1553f9f8d02fSStefan Haberland if (private->uid.type == UA_BASE_PAV_ALIAS || 1554f9f8d02fSStefan Haberland private->uid.type == UA_HYPER_PAV_ALIAS) 155512d7b107SStefan Haberland return 0; 155640545573SHorst Hummel if (dasd_nopav || MACHINE_IS_VM) 1557f3eb5384SStefan Weinhuber enable_pav = 0; 1558f3eb5384SStefan Weinhuber else 1559f3eb5384SStefan Weinhuber enable_pav = 1; 156012d7b107SStefan Haberland rc = dasd_eckd_psf_ssc(device, enable_pav, flags); 1561eb6e199bSStefan Weinhuber 156240545573SHorst Hummel /* may be requested feature is not available on server, 156340545573SHorst Hummel * therefore just report error and go ahead */ 1564b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " 1565b8ed5dd5SStefan Haberland "returned rc=%d", private->uid.ssid, rc); 156612d7b107SStefan Haberland return rc; 156740545573SHorst Hummel } 156840545573SHorst Hummel 1569f1633031SStefan Haberland /* 1570f1633031SStefan Haberland * worker to do a validate server in case of a lost pathgroup 1571f1633031SStefan Haberland */ 1572f1633031SStefan Haberland static void dasd_eckd_do_validate_server(struct work_struct *work) 1573f1633031SStefan Haberland { 1574f1633031SStefan Haberland struct dasd_device *device = container_of(work, struct dasd_device, 1575f1633031SStefan Haberland kick_validate); 1576ea4da6eaSStefan Haberland unsigned long flags = 0; 1577ea4da6eaSStefan Haberland 1578ea4da6eaSStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &flags); 1579ea4da6eaSStefan Haberland if (dasd_eckd_validate_server(device, flags) 158012d7b107SStefan Haberland == -EAGAIN) { 158112d7b107SStefan Haberland /* schedule worker again if failed */ 158212d7b107SStefan Haberland schedule_work(&device->kick_validate); 158312d7b107SStefan Haberland return; 158412d7b107SStefan Haberland } 158512d7b107SStefan Haberland 1586f1633031SStefan Haberland dasd_put_device(device); 1587f1633031SStefan Haberland } 1588f1633031SStefan Haberland 1589f1633031SStefan Haberland static void dasd_eckd_kick_validate_server(struct dasd_device *device) 1590f1633031SStefan Haberland { 1591f1633031SStefan Haberland dasd_get_device(device); 159225e2cf1cSStefan Haberland /* exit if device not online or in offline processing */ 159325e2cf1cSStefan Haberland if (test_bit(DASD_FLAG_OFFLINE, &device->flags) || 159425e2cf1cSStefan Haberland device->state < DASD_STATE_ONLINE) { 159525e2cf1cSStefan Haberland dasd_put_device(device); 159625e2cf1cSStefan Haberland return; 159725e2cf1cSStefan Haberland } 1598f1633031SStefan Haberland /* queue call to do_validate_server to the kernel event daemon. */ 1599f1633031SStefan Haberland schedule_work(&device->kick_validate); 1600f1633031SStefan Haberland } 1601f1633031SStefan Haberland 1602ef19298bSStefan Weinhuber static u32 get_fcx_max_data(struct dasd_device *device) 1603ef19298bSStefan Weinhuber { 1604ef19298bSStefan Weinhuber #if defined(CONFIG_64BIT) 1605ef19298bSStefan Weinhuber int tpm, mdc; 1606ef19298bSStefan Weinhuber int fcx_in_css, fcx_in_gneq, fcx_in_features; 1607ef19298bSStefan Weinhuber struct dasd_eckd_private *private; 1608ef19298bSStefan Weinhuber 1609ef19298bSStefan Weinhuber if (dasd_nofcx) 1610ef19298bSStefan Weinhuber return 0; 1611ef19298bSStefan Weinhuber /* is transport mode supported? */ 1612ef19298bSStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 1613ef19298bSStefan Weinhuber fcx_in_css = css_general_characteristics.fcx; 1614ef19298bSStefan Weinhuber fcx_in_gneq = private->gneq->reserved2[7] & 0x04; 1615ef19298bSStefan Weinhuber fcx_in_features = private->features.feature[40] & 0x80; 1616ef19298bSStefan Weinhuber tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; 1617ef19298bSStefan Weinhuber 1618ef19298bSStefan Weinhuber if (!tpm) 1619ef19298bSStefan Weinhuber return 0; 1620ef19298bSStefan Weinhuber 1621ef19298bSStefan Weinhuber mdc = ccw_device_get_mdc(device->cdev, 0); 1622ef19298bSStefan Weinhuber if (mdc < 0) { 1623ef19298bSStefan Weinhuber dev_warn(&device->cdev->dev, "Detecting the maximum supported" 1624ef19298bSStefan Weinhuber " data size for zHPF requests failed\n"); 1625ef19298bSStefan Weinhuber return 0; 1626ef19298bSStefan Weinhuber } else 1627ef19298bSStefan Weinhuber return mdc * FCX_MAX_DATA_FACTOR; 1628ef19298bSStefan Weinhuber #else 1629ef19298bSStefan Weinhuber return 0; 1630ef19298bSStefan Weinhuber #endif 1631ef19298bSStefan Weinhuber } 1632ef19298bSStefan Weinhuber 163340545573SHorst Hummel /* 16343d052595SHorst Hummel * Check device characteristics. 16353d052595SHorst Hummel * If the device is accessible using ECKD discipline, the device is enabled. 16363d052595SHorst Hummel */ 16371da177e4SLinus Torvalds static int 16381da177e4SLinus Torvalds dasd_eckd_check_characteristics(struct dasd_device *device) 16391da177e4SLinus Torvalds { 16401da177e4SLinus Torvalds struct dasd_eckd_private *private; 16418e09f215SStefan Weinhuber struct dasd_block *block; 16422dedf0d9SStefan Haberland struct dasd_uid temp_uid; 1643f9f8d02fSStefan Haberland int rc, i; 164433b62a30SStefan Weinhuber int readonly; 16457c8faa86SStefan Haberland unsigned long value; 16461da177e4SLinus Torvalds 1647f1633031SStefan Haberland /* setup work queue for validate server*/ 1648f1633031SStefan Haberland INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server); 1649f1633031SStefan Haberland 1650454e1fa1SPeter Oberparleiter if (!ccw_device_is_pathgroup(device->cdev)) { 1651454e1fa1SPeter Oberparleiter dev_warn(&device->cdev->dev, 1652454e1fa1SPeter Oberparleiter "A channel path group could not be established\n"); 1653454e1fa1SPeter Oberparleiter return -EIO; 1654454e1fa1SPeter Oberparleiter } 1655454e1fa1SPeter Oberparleiter if (!ccw_device_is_multipath(device->cdev)) { 1656454e1fa1SPeter Oberparleiter dev_info(&device->cdev->dev, 1657454e1fa1SPeter Oberparleiter "The DASD is not operating in multipath mode\n"); 1658454e1fa1SPeter Oberparleiter } 16591da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 166092636b15SSebastian Ott if (!private) { 166192636b15SSebastian Ott private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); 166292636b15SSebastian Ott if (!private) { 1663fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1664fc19f381SStefan Haberland "Allocating memory for private DASD data " 1665fc19f381SStefan Haberland "failed\n"); 16661da177e4SLinus Torvalds return -ENOMEM; 16671da177e4SLinus Torvalds } 16681da177e4SLinus Torvalds device->private = (void *) private; 166992636b15SSebastian Ott } else { 167092636b15SSebastian Ott memset(private, 0, sizeof(*private)); 16711da177e4SLinus Torvalds } 16721da177e4SLinus Torvalds /* Invalidate status of initial analysis. */ 16731da177e4SLinus Torvalds private->init_cqr_status = -1; 16741da177e4SLinus Torvalds /* Set default cache operations. */ 16751da177e4SLinus Torvalds private->attrib.operation = DASD_NORMAL_CACHE; 16761da177e4SLinus Torvalds private->attrib.nr_cyl = 0; 16771da177e4SLinus Torvalds 167840545573SHorst Hummel /* Read Configuration Data */ 167940545573SHorst Hummel rc = dasd_eckd_read_conf(device); 168040545573SHorst Hummel if (rc) 16818e09f215SStefan Weinhuber goto out_err1; 168240545573SHorst Hummel 16837c8faa86SStefan Haberland /* set default timeout */ 16847c8faa86SStefan Haberland device->default_expires = DASD_EXPIRES; 16851f1ee9adSHannes Reinecke /* set default retry count */ 16861f1ee9adSHannes Reinecke device->default_retries = DASD_RETRIES; 16871f1ee9adSHannes Reinecke 16887c8faa86SStefan Haberland if (private->gneq) { 16897c8faa86SStefan Haberland value = 1; 16907c8faa86SStefan Haberland for (i = 0; i < private->gneq->timeout.value; i++) 16917c8faa86SStefan Haberland value = 10 * value; 16927c8faa86SStefan Haberland value = value * private->gneq->timeout.number; 16937c8faa86SStefan Haberland /* do not accept useless values */ 16947c8faa86SStefan Haberland if (value != 0 && value <= DASD_EXPIRES_MAX) 16957c8faa86SStefan Haberland device->default_expires = value; 16967c8faa86SStefan Haberland } 16977c8faa86SStefan Haberland 16982dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 16992dedf0d9SStefan Haberland if (temp_uid.type == UA_BASE_DEVICE) { 17008e09f215SStefan Weinhuber block = dasd_alloc_block(); 17018e09f215SStefan Weinhuber if (IS_ERR(block)) { 1702b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1703b8ed5dd5SStefan Haberland "could not allocate dasd " 1704b8ed5dd5SStefan Haberland "block structure"); 17058e09f215SStefan Weinhuber rc = PTR_ERR(block); 17068e09f215SStefan Weinhuber goto out_err1; 17078e09f215SStefan Weinhuber } 17088e09f215SStefan Weinhuber device->block = block; 17098e09f215SStefan Weinhuber block->base = device; 17108e09f215SStefan Weinhuber } 17118e09f215SStefan Weinhuber 1712f9f8d02fSStefan Haberland /* register lcu with alias handling, enable PAV */ 1713f9f8d02fSStefan Haberland rc = dasd_alias_make_device_known_to_lcu(device); 1714f9f8d02fSStefan Haberland if (rc) 17158e09f215SStefan Weinhuber goto out_err2; 1716f9f8d02fSStefan Haberland 171712d7b107SStefan Haberland dasd_eckd_validate_server(device, 0); 1718f4ac1d02SStefan Weinhuber 1719f4ac1d02SStefan Weinhuber /* device may report different configuration data after LCU setup */ 1720f4ac1d02SStefan Weinhuber rc = dasd_eckd_read_conf(device); 172140545573SHorst Hummel if (rc) 17228e09f215SStefan Weinhuber goto out_err3; 17238e09f215SStefan Weinhuber 17248e09f215SStefan Weinhuber /* Read Feature Codes */ 172568d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 172640545573SHorst Hummel 17271da177e4SLinus Torvalds /* Read Device Characteristics */ 172868b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 172968b781feSStefan Haberland &private->rdc_data, 64); 17308e09f215SStefan Weinhuber if (rc) { 1731b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1732b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 17338e09f215SStefan Weinhuber goto out_err3; 17348e09f215SStefan Weinhuber } 173534cd551aSStefan Haberland 173634cd551aSStefan Haberland if ((device->features & DASD_FEATURE_USERAW) && 173734cd551aSStefan Haberland !(private->rdc_data.facilities.RT_in_LR)) { 173834cd551aSStefan Haberland dev_err(&device->cdev->dev, "The storage server does not " 173934cd551aSStefan Haberland "support raw-track access\n"); 174034cd551aSStefan Haberland rc = -EINVAL; 174134cd551aSStefan Haberland goto out_err3; 174234cd551aSStefan Haberland } 174334cd551aSStefan Haberland 1744817f2c84SNikanth Karthikesan /* find the valid cylinder size */ 1745b44b0ab3SStefan Weinhuber if (private->rdc_data.no_cyl == LV_COMPAT_CYL && 1746b44b0ab3SStefan Weinhuber private->rdc_data.long_no_cyl) 1747b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.long_no_cyl; 1748b44b0ab3SStefan Weinhuber else 1749b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.no_cyl; 1750b44b0ab3SStefan Weinhuber 1751ef19298bSStefan Weinhuber private->fcx_max_data = get_fcx_max_data(device); 1752ef19298bSStefan Weinhuber 175333b62a30SStefan Weinhuber readonly = dasd_device_is_ro(device); 175433b62a30SStefan Weinhuber if (readonly) 175533b62a30SStefan Weinhuber set_bit(DASD_FLAG_DEVICE_RO, &device->flags); 175633b62a30SStefan Weinhuber 1757fc19f381SStefan Haberland dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " 175833b62a30SStefan Weinhuber "with %d cylinders, %d heads, %d sectors%s\n", 17591da177e4SLinus Torvalds private->rdc_data.dev_type, 17601da177e4SLinus Torvalds private->rdc_data.dev_model, 17611da177e4SLinus Torvalds private->rdc_data.cu_type, 17621da177e4SLinus Torvalds private->rdc_data.cu_model.model, 1763b44b0ab3SStefan Weinhuber private->real_cyl, 17641da177e4SLinus Torvalds private->rdc_data.trk_per_cyl, 176533b62a30SStefan Weinhuber private->rdc_data.sec_per_trk, 176633b62a30SStefan Weinhuber readonly ? ", read-only device" : ""); 17678e09f215SStefan Weinhuber return 0; 17688e09f215SStefan Weinhuber 17698e09f215SStefan Weinhuber out_err3: 17708e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 17718e09f215SStefan Weinhuber out_err2: 17728e09f215SStefan Weinhuber dasd_free_block(device->block); 17738e09f215SStefan Weinhuber device->block = NULL; 17748e09f215SStefan Weinhuber out_err1: 17754abb08c2SStefan Weinhuber kfree(private->conf_data); 17768e09f215SStefan Weinhuber kfree(device->private); 17778e09f215SStefan Weinhuber device->private = NULL; 17783d052595SHorst Hummel return rc; 17791da177e4SLinus Torvalds } 17801da177e4SLinus Torvalds 17818e09f215SStefan Weinhuber static void dasd_eckd_uncheck_device(struct dasd_device *device) 17828e09f215SStefan Weinhuber { 17834abb08c2SStefan Weinhuber struct dasd_eckd_private *private; 17844abb08c2SStefan Weinhuber 17854abb08c2SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 17868e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 17874abb08c2SStefan Weinhuber private->ned = NULL; 17884abb08c2SStefan Weinhuber private->sneq = NULL; 17894abb08c2SStefan Weinhuber private->vdsneq = NULL; 17904abb08c2SStefan Weinhuber private->gneq = NULL; 17914abb08c2SStefan Weinhuber private->conf_len = 0; 17924abb08c2SStefan Weinhuber kfree(private->conf_data); 17934abb08c2SStefan Weinhuber private->conf_data = NULL; 17948e09f215SStefan Weinhuber } 17958e09f215SStefan Weinhuber 17961da177e4SLinus Torvalds static struct dasd_ccw_req * 17971da177e4SLinus Torvalds dasd_eckd_analysis_ccw(struct dasd_device *device) 17981da177e4SLinus Torvalds { 17991da177e4SLinus Torvalds struct dasd_eckd_private *private; 18001da177e4SLinus Torvalds struct eckd_count *count_data; 18011da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 18021da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 18031da177e4SLinus Torvalds struct ccw1 *ccw; 18041da177e4SLinus Torvalds int cplength, datasize; 18051da177e4SLinus Torvalds int i; 18061da177e4SLinus Torvalds 18071da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 18081da177e4SLinus Torvalds 18091da177e4SLinus Torvalds cplength = 8; 18101da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 181168b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 18121da177e4SLinus Torvalds if (IS_ERR(cqr)) 18131da177e4SLinus Torvalds return cqr; 18141da177e4SLinus Torvalds ccw = cqr->cpaddr; 18151da177e4SLinus Torvalds /* Define extent for the first 3 tracks. */ 18161da177e4SLinus Torvalds define_extent(ccw++, cqr->data, 0, 2, 18171da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device); 18181da177e4SLinus Torvalds LO_data = cqr->data + sizeof(struct DE_eckd_data); 18191da177e4SLinus Torvalds /* Locate record for the first 4 records on track 0. */ 18201da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18211da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 0, 0, 4, 18221da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 18231da177e4SLinus Torvalds 18241da177e4SLinus Torvalds count_data = private->count_area; 18251da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 18261da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18271da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 18281da177e4SLinus Torvalds ccw->flags = 0; 18291da177e4SLinus Torvalds ccw->count = 8; 18301da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 18311da177e4SLinus Torvalds ccw++; 18321da177e4SLinus Torvalds count_data++; 18331da177e4SLinus Torvalds } 18341da177e4SLinus Torvalds 18351da177e4SLinus Torvalds /* Locate record for the first record on track 2. */ 18361da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18371da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 2, 0, 1, 18381da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 18391da177e4SLinus Torvalds /* Read count ccw. */ 18401da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18411da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 18421da177e4SLinus Torvalds ccw->flags = 0; 18431da177e4SLinus Torvalds ccw->count = 8; 18441da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 18451da177e4SLinus Torvalds 18468e09f215SStefan Weinhuber cqr->block = NULL; 18478e09f215SStefan Weinhuber cqr->startdev = device; 18488e09f215SStefan Weinhuber cqr->memdev = device; 1849eb6e199bSStefan Weinhuber cqr->retries = 255; 18501aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 18511da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 18521da177e4SLinus Torvalds return cqr; 18531da177e4SLinus Torvalds } 18541da177e4SLinus Torvalds 1855eb6e199bSStefan Weinhuber /* differentiate between 'no record found' and any other error */ 1856eb6e199bSStefan Weinhuber static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) 1857eb6e199bSStefan Weinhuber { 1858eb6e199bSStefan Weinhuber char *sense; 1859eb6e199bSStefan Weinhuber if (init_cqr->status == DASD_CQR_DONE) 1860eb6e199bSStefan Weinhuber return INIT_CQR_OK; 1861eb6e199bSStefan Weinhuber else if (init_cqr->status == DASD_CQR_NEED_ERP || 1862eb6e199bSStefan Weinhuber init_cqr->status == DASD_CQR_FAILED) { 1863eb6e199bSStefan Weinhuber sense = dasd_get_sense(&init_cqr->irb); 1864eb6e199bSStefan Weinhuber if (sense && (sense[1] & SNS1_NO_REC_FOUND)) 1865eb6e199bSStefan Weinhuber return INIT_CQR_UNFORMATTED; 1866eb6e199bSStefan Weinhuber else 1867eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 1868eb6e199bSStefan Weinhuber } else 1869eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 1870eb6e199bSStefan Weinhuber } 1871eb6e199bSStefan Weinhuber 18721da177e4SLinus Torvalds /* 18731da177e4SLinus Torvalds * This is the callback function for the init_analysis cqr. It saves 18741da177e4SLinus Torvalds * the status of the initial analysis ccw before it frees it and kicks 18751da177e4SLinus Torvalds * the device to continue the startup sequence. This will call 18761da177e4SLinus Torvalds * dasd_eckd_do_analysis again (if the devices has not been marked 18771da177e4SLinus Torvalds * for deletion in the meantime). 18781da177e4SLinus Torvalds */ 1879eb6e199bSStefan Weinhuber static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, 1880eb6e199bSStefan Weinhuber void *data) 18811da177e4SLinus Torvalds { 18821da177e4SLinus Torvalds struct dasd_eckd_private *private; 18831da177e4SLinus Torvalds struct dasd_device *device; 18841da177e4SLinus Torvalds 18858e09f215SStefan Weinhuber device = init_cqr->startdev; 18861da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 1887eb6e199bSStefan Weinhuber private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); 18881da177e4SLinus Torvalds dasd_sfree_request(init_cqr, device); 18891da177e4SLinus Torvalds dasd_kick_device(device); 18901da177e4SLinus Torvalds } 18911da177e4SLinus Torvalds 1892eb6e199bSStefan Weinhuber static int dasd_eckd_start_analysis(struct dasd_block *block) 18931da177e4SLinus Torvalds { 18941da177e4SLinus Torvalds struct dasd_ccw_req *init_cqr; 18951da177e4SLinus Torvalds 18968e09f215SStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(block->base); 18971da177e4SLinus Torvalds if (IS_ERR(init_cqr)) 18981da177e4SLinus Torvalds return PTR_ERR(init_cqr); 18991da177e4SLinus Torvalds init_cqr->callback = dasd_eckd_analysis_callback; 19001da177e4SLinus Torvalds init_cqr->callback_data = NULL; 19011da177e4SLinus Torvalds init_cqr->expires = 5*HZ; 1902eb6e199bSStefan Weinhuber /* first try without ERP, so we can later handle unformatted 1903eb6e199bSStefan Weinhuber * devices as special case 1904eb6e199bSStefan Weinhuber */ 1905eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); 1906eb6e199bSStefan Weinhuber init_cqr->retries = 0; 19071da177e4SLinus Torvalds dasd_add_request_head(init_cqr); 19081da177e4SLinus Torvalds return -EAGAIN; 19091da177e4SLinus Torvalds } 19101da177e4SLinus Torvalds 1911eb6e199bSStefan Weinhuber static int dasd_eckd_end_analysis(struct dasd_block *block) 19121da177e4SLinus Torvalds { 19138e09f215SStefan Weinhuber struct dasd_device *device; 19141da177e4SLinus Torvalds struct dasd_eckd_private *private; 19151da177e4SLinus Torvalds struct eckd_count *count_area; 19161da177e4SLinus Torvalds unsigned int sb, blk_per_trk; 19171da177e4SLinus Torvalds int status, i; 1918eb6e199bSStefan Weinhuber struct dasd_ccw_req *init_cqr; 19191da177e4SLinus Torvalds 19208e09f215SStefan Weinhuber device = block->base; 19211da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 19221da177e4SLinus Torvalds status = private->init_cqr_status; 19231da177e4SLinus Torvalds private->init_cqr_status = -1; 1924eb6e199bSStefan Weinhuber if (status == INIT_CQR_ERROR) { 1925eb6e199bSStefan Weinhuber /* try again, this time with full ERP */ 1926eb6e199bSStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(device); 1927eb6e199bSStefan Weinhuber dasd_sleep_on(init_cqr); 1928eb6e199bSStefan Weinhuber status = dasd_eckd_analysis_evaluation(init_cqr); 1929eb6e199bSStefan Weinhuber dasd_sfree_request(init_cqr, device); 1930eb6e199bSStefan Weinhuber } 1931eb6e199bSStefan Weinhuber 1932e4dbb0f2SStefan Haberland if (device->features & DASD_FEATURE_USERAW) { 1933e4dbb0f2SStefan Haberland block->bp_block = DASD_RAW_BLOCKSIZE; 1934e4dbb0f2SStefan Haberland blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; 1935e4dbb0f2SStefan Haberland block->s2b_shift = 3; 1936e4dbb0f2SStefan Haberland goto raw; 1937e4dbb0f2SStefan Haberland } 1938e4dbb0f2SStefan Haberland 1939eb6e199bSStefan Weinhuber if (status == INIT_CQR_UNFORMATTED) { 1940eb6e199bSStefan Weinhuber dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); 19411da177e4SLinus Torvalds return -EMEDIUMTYPE; 1942eb6e199bSStefan Weinhuber } else if (status == INIT_CQR_ERROR) { 1943eb6e199bSStefan Weinhuber dev_err(&device->cdev->dev, 1944eb6e199bSStefan Weinhuber "Detecting the DASD disk layout failed because " 1945eb6e199bSStefan Weinhuber "of an I/O error\n"); 1946eb6e199bSStefan Weinhuber return -EIO; 19471da177e4SLinus Torvalds } 19481da177e4SLinus Torvalds 19491da177e4SLinus Torvalds private->uses_cdl = 1; 19501da177e4SLinus Torvalds /* Check Track 0 for Compatible Disk Layout */ 19511da177e4SLinus Torvalds count_area = NULL; 19521da177e4SLinus Torvalds for (i = 0; i < 3; i++) { 19531da177e4SLinus Torvalds if (private->count_area[i].kl != 4 || 19543bc9fef9SStefan Haberland private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 || 19553bc9fef9SStefan Haberland private->count_area[i].cyl != 0 || 19563bc9fef9SStefan Haberland private->count_area[i].head != count_area_head[i] || 19573bc9fef9SStefan Haberland private->count_area[i].record != count_area_rec[i]) { 19581da177e4SLinus Torvalds private->uses_cdl = 0; 19591da177e4SLinus Torvalds break; 19601da177e4SLinus Torvalds } 19611da177e4SLinus Torvalds } 19621da177e4SLinus Torvalds if (i == 3) 19631da177e4SLinus Torvalds count_area = &private->count_area[4]; 19641da177e4SLinus Torvalds 19651da177e4SLinus Torvalds if (private->uses_cdl == 0) { 19661da177e4SLinus Torvalds for (i = 0; i < 5; i++) { 19671da177e4SLinus Torvalds if ((private->count_area[i].kl != 0) || 19681da177e4SLinus Torvalds (private->count_area[i].dl != 19693bc9fef9SStefan Haberland private->count_area[0].dl) || 19703bc9fef9SStefan Haberland private->count_area[i].cyl != 0 || 19713bc9fef9SStefan Haberland private->count_area[i].head != count_area_head[i] || 19723bc9fef9SStefan Haberland private->count_area[i].record != count_area_rec[i]) 19731da177e4SLinus Torvalds break; 19741da177e4SLinus Torvalds } 19751da177e4SLinus Torvalds if (i == 5) 19761da177e4SLinus Torvalds count_area = &private->count_area[0]; 19771da177e4SLinus Torvalds } else { 19781da177e4SLinus Torvalds if (private->count_area[3].record == 1) 1979fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1980fc19f381SStefan Haberland "Track 0 has no records following the VTOC\n"); 19811da177e4SLinus Torvalds } 1982e4dbb0f2SStefan Haberland 19831da177e4SLinus Torvalds if (count_area != NULL && count_area->kl == 0) { 19841da177e4SLinus Torvalds /* we found notthing violating our disk layout */ 19851da177e4SLinus Torvalds if (dasd_check_blocksize(count_area->dl) == 0) 19868e09f215SStefan Weinhuber block->bp_block = count_area->dl; 19871da177e4SLinus Torvalds } 19888e09f215SStefan Weinhuber if (block->bp_block == 0) { 1989fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1990fc19f381SStefan Haberland "The disk layout of the DASD is not supported\n"); 19911da177e4SLinus Torvalds return -EMEDIUMTYPE; 19921da177e4SLinus Torvalds } 19938e09f215SStefan Weinhuber block->s2b_shift = 0; /* bits to shift 512 to get a block */ 19948e09f215SStefan Weinhuber for (sb = 512; sb < block->bp_block; sb = sb << 1) 19958e09f215SStefan Weinhuber block->s2b_shift++; 19961da177e4SLinus Torvalds 19978e09f215SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 1998e4dbb0f2SStefan Haberland 1999e4dbb0f2SStefan Haberland raw: 2000b44b0ab3SStefan Weinhuber block->blocks = (private->real_cyl * 20011da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 20021da177e4SLinus Torvalds blk_per_trk); 20031da177e4SLinus Torvalds 2004fc19f381SStefan Haberland dev_info(&device->cdev->dev, 2005fc19f381SStefan Haberland "DASD with %d KB/block, %d KB total size, %d KB/track, " 2006fc19f381SStefan Haberland "%s\n", (block->bp_block >> 10), 2007b44b0ab3SStefan Weinhuber ((private->real_cyl * 20081da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 20098e09f215SStefan Weinhuber blk_per_trk * (block->bp_block >> 9)) >> 1), 20108e09f215SStefan Weinhuber ((blk_per_trk * block->bp_block) >> 10), 20111da177e4SLinus Torvalds private->uses_cdl ? 20121da177e4SLinus Torvalds "compatible disk layout" : "linux disk layout"); 20131da177e4SLinus Torvalds 20141da177e4SLinus Torvalds return 0; 20151da177e4SLinus Torvalds } 20161da177e4SLinus Torvalds 20178e09f215SStefan Weinhuber static int dasd_eckd_do_analysis(struct dasd_block *block) 20181da177e4SLinus Torvalds { 20191da177e4SLinus Torvalds struct dasd_eckd_private *private; 20201da177e4SLinus Torvalds 20218e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 20221da177e4SLinus Torvalds if (private->init_cqr_status < 0) 20238e09f215SStefan Weinhuber return dasd_eckd_start_analysis(block); 20241da177e4SLinus Torvalds else 20258e09f215SStefan Weinhuber return dasd_eckd_end_analysis(block); 20261da177e4SLinus Torvalds } 20271da177e4SLinus Torvalds 2028d42e1712SStefan Haberland static int dasd_eckd_basic_to_ready(struct dasd_device *device) 20298e09f215SStefan Weinhuber { 20308e09f215SStefan Weinhuber return dasd_alias_add_device(device); 20318e09f215SStefan Weinhuber }; 20328e09f215SStefan Weinhuber 20338e09f215SStefan Weinhuber static int dasd_eckd_online_to_ready(struct dasd_device *device) 20348e09f215SStefan Weinhuber { 2035501183f2SStefan Haberland cancel_work_sync(&device->reload_device); 203625e2cf1cSStefan Haberland cancel_work_sync(&device->kick_validate); 2037d42e1712SStefan Haberland return 0; 2038d42e1712SStefan Haberland }; 2039d42e1712SStefan Haberland 2040d42e1712SStefan Haberland static int dasd_eckd_ready_to_basic(struct dasd_device *device) 2041d42e1712SStefan Haberland { 20428e09f215SStefan Weinhuber return dasd_alias_remove_device(device); 20438e09f215SStefan Weinhuber }; 20448e09f215SStefan Weinhuber 20451da177e4SLinus Torvalds static int 20468e09f215SStefan Weinhuber dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 20471da177e4SLinus Torvalds { 20481da177e4SLinus Torvalds struct dasd_eckd_private *private; 20491da177e4SLinus Torvalds 20508e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 20518e09f215SStefan Weinhuber if (dasd_check_blocksize(block->bp_block) == 0) { 20521da177e4SLinus Torvalds geo->sectors = recs_per_track(&private->rdc_data, 20538e09f215SStefan Weinhuber 0, block->bp_block); 20541da177e4SLinus Torvalds } 20551da177e4SLinus Torvalds geo->cylinders = private->rdc_data.no_cyl; 20561da177e4SLinus Torvalds geo->heads = private->rdc_data.trk_per_cyl; 20571da177e4SLinus Torvalds return 0; 20581da177e4SLinus Torvalds } 20591da177e4SLinus Torvalds 20601da177e4SLinus Torvalds static struct dasd_ccw_req * 2061d42e1712SStefan Haberland dasd_eckd_build_format(struct dasd_device *base, 20621da177e4SLinus Torvalds struct format_data_t *fdata) 20631da177e4SLinus Torvalds { 2064d42e1712SStefan Haberland struct dasd_eckd_private *base_priv; 2065d42e1712SStefan Haberland struct dasd_eckd_private *start_priv; 2066d42e1712SStefan Haberland struct dasd_device *startdev; 20671da177e4SLinus Torvalds struct dasd_ccw_req *fcp; 20681da177e4SLinus Torvalds struct eckd_count *ect; 2069d42e1712SStefan Haberland struct ch_t address; 20701da177e4SLinus Torvalds struct ccw1 *ccw; 20711da177e4SLinus Torvalds void *data; 2072b44b0ab3SStefan Weinhuber int rpt; 20731da177e4SLinus Torvalds int cplength, datasize; 2074d42e1712SStefan Haberland int i, j; 2075f9a28f7bSJean-Baptiste Joret int intensity = 0; 2076f9a28f7bSJean-Baptiste Joret int r0_perm; 2077d42e1712SStefan Haberland int nr_tracks; 20781da177e4SLinus Torvalds 2079d42e1712SStefan Haberland startdev = dasd_alias_get_start_dev(base); 2080d42e1712SStefan Haberland if (!startdev) 2081d42e1712SStefan Haberland startdev = base; 20821da177e4SLinus Torvalds 2083d42e1712SStefan Haberland start_priv = (struct dasd_eckd_private *) startdev->private; 2084d42e1712SStefan Haberland base_priv = (struct dasd_eckd_private *) base->private; 2085d42e1712SStefan Haberland 2086d42e1712SStefan Haberland rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize); 2087d42e1712SStefan Haberland 2088d42e1712SStefan Haberland nr_tracks = fdata->stop_unit - fdata->start_unit + 1; 20891da177e4SLinus Torvalds 20901da177e4SLinus Torvalds /* 20911da177e4SLinus Torvalds * fdata->intensity is a bit string that tells us what to do: 20921da177e4SLinus Torvalds * Bit 0: write record zero 20931da177e4SLinus Torvalds * Bit 1: write home address, currently not supported 20941da177e4SLinus Torvalds * Bit 2: invalidate tracks 20951da177e4SLinus Torvalds * Bit 3: use OS/390 compatible disk layout (cdl) 2096f9a28f7bSJean-Baptiste Joret * Bit 4: do not allow storage subsystem to modify record zero 20971da177e4SLinus Torvalds * Only some bit combinations do make sense. 20981da177e4SLinus Torvalds */ 2099f9a28f7bSJean-Baptiste Joret if (fdata->intensity & 0x10) { 2100f9a28f7bSJean-Baptiste Joret r0_perm = 0; 2101f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity & ~0x10; 2102f9a28f7bSJean-Baptiste Joret } else { 2103f9a28f7bSJean-Baptiste Joret r0_perm = 1; 2104f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity; 2105f9a28f7bSJean-Baptiste Joret } 2106d42e1712SStefan Haberland 2107f9a28f7bSJean-Baptiste Joret switch (intensity) { 21081da177e4SLinus Torvalds case 0x00: /* Normal format */ 21091da177e4SLinus Torvalds case 0x08: /* Normal format, use cdl. */ 2110d42e1712SStefan Haberland cplength = 2 + (rpt*nr_tracks); 2111d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 21121da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 2113d42e1712SStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 21141da177e4SLinus Torvalds break; 21151da177e4SLinus Torvalds case 0x01: /* Write record zero and format track. */ 21161da177e4SLinus Torvalds case 0x09: /* Write record zero and format track, use cdl. */ 2117d42e1712SStefan Haberland cplength = 2 + rpt * nr_tracks; 2118d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 21191da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 21201da177e4SLinus Torvalds sizeof(struct eckd_count) + 2121d42e1712SStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 21221da177e4SLinus Torvalds break; 21231da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 21241da177e4SLinus Torvalds case 0x0c: /* Invalidate track, use cdl. */ 21251da177e4SLinus Torvalds cplength = 3; 2126d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 21271da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 21281da177e4SLinus Torvalds sizeof(struct eckd_count); 21291da177e4SLinus Torvalds break; 21301da177e4SLinus Torvalds default: 2131d42e1712SStefan Haberland dev_warn(&startdev->cdev->dev, 2132d42e1712SStefan Haberland "An I/O control call used incorrect flags 0x%x\n", 2133d42e1712SStefan Haberland fdata->intensity); 21341da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 21351da177e4SLinus Torvalds } 21361da177e4SLinus Torvalds /* Allocate the format ccw request. */ 2137d42e1712SStefan Haberland fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 2138d42e1712SStefan Haberland datasize, startdev); 21391da177e4SLinus Torvalds if (IS_ERR(fcp)) 21401da177e4SLinus Torvalds return fcp; 21411da177e4SLinus Torvalds 2142d42e1712SStefan Haberland start_priv->count++; 21431da177e4SLinus Torvalds data = fcp->data; 21441da177e4SLinus Torvalds ccw = fcp->cpaddr; 21451da177e4SLinus Torvalds 2146f9a28f7bSJean-Baptiste Joret switch (intensity & ~0x08) { 21471da177e4SLinus Torvalds case 0x00: /* Normal format. */ 2148d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2149d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 2150d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2151f9a28f7bSJean-Baptiste Joret /* grant subsystem permission to format R0 */ 2152f9a28f7bSJean-Baptiste Joret if (r0_perm) 2153d42e1712SStefan Haberland ((struct PFX_eckd_data *)data) 2154d42e1712SStefan Haberland ->define_extent.ga_extended |= 0x04; 2155d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 21561da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 21571da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 2158d42e1712SStefan Haberland fdata->start_unit, 0, rpt*nr_tracks, 2159d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, 21601da177e4SLinus Torvalds fdata->blksize); 21611da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 21621da177e4SLinus Torvalds break; 21631da177e4SLinus Torvalds case 0x01: /* Write record zero + format track. */ 2164d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2165d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 21661da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, 2167d42e1712SStefan Haberland base, startdev); 2168d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 21691da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 21701da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 2171d42e1712SStefan Haberland fdata->start_unit, 0, rpt * nr_tracks + 1, 2172d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_RECORD_ZERO, base, 2173d42e1712SStefan Haberland base->block->bp_block); 21741da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 21751da177e4SLinus Torvalds break; 21761da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 2177d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2178d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 2179d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2180d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 21811da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 21821da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 21831da177e4SLinus Torvalds fdata->start_unit, 0, 1, 2184d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, 8); 21851da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 21861da177e4SLinus Torvalds break; 21871da177e4SLinus Torvalds } 2188d42e1712SStefan Haberland 2189d42e1712SStefan Haberland for (j = 0; j < nr_tracks; j++) { 2190d42e1712SStefan Haberland /* calculate cylinder and head for the current track */ 2191d42e1712SStefan Haberland set_ch_t(&address, 2192d42e1712SStefan Haberland (fdata->start_unit + j) / 2193d42e1712SStefan Haberland base_priv->rdc_data.trk_per_cyl, 2194d42e1712SStefan Haberland (fdata->start_unit + j) % 2195d42e1712SStefan Haberland base_priv->rdc_data.trk_per_cyl); 2196f9a28f7bSJean-Baptiste Joret if (intensity & 0x01) { /* write record zero */ 21971da177e4SLinus Torvalds ect = (struct eckd_count *) data; 21981da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2199b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2200b44b0ab3SStefan Weinhuber ect->head = address.head; 22011da177e4SLinus Torvalds ect->record = 0; 22021da177e4SLinus Torvalds ect->kl = 0; 22031da177e4SLinus Torvalds ect->dl = 8; 22041da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 22051da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 22061da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 22071da177e4SLinus Torvalds ccw->count = 8; 22081da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 22091da177e4SLinus Torvalds ccw++; 22101da177e4SLinus Torvalds } 2211f9a28f7bSJean-Baptiste Joret if ((intensity & ~0x08) & 0x04) { /* erase track */ 22121da177e4SLinus Torvalds ect = (struct eckd_count *) data; 22131da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2214b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2215b44b0ab3SStefan Weinhuber ect->head = address.head; 22161da177e4SLinus Torvalds ect->record = 1; 22171da177e4SLinus Torvalds ect->kl = 0; 22181da177e4SLinus Torvalds ect->dl = 0; 22191da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 22201da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 22211da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 22221da177e4SLinus Torvalds ccw->count = 8; 22231da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 22241da177e4SLinus Torvalds } else { /* write remaining records */ 22251da177e4SLinus Torvalds for (i = 0; i < rpt; i++) { 22261da177e4SLinus Torvalds ect = (struct eckd_count *) data; 22271da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2228b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2229b44b0ab3SStefan Weinhuber ect->head = address.head; 22301da177e4SLinus Torvalds ect->record = i + 1; 22311da177e4SLinus Torvalds ect->kl = 0; 22321da177e4SLinus Torvalds ect->dl = fdata->blksize; 2233d42e1712SStefan Haberland /* 2234d42e1712SStefan Haberland * Check for special tracks 0-1 2235d42e1712SStefan Haberland * when formatting CDL 2236d42e1712SStefan Haberland */ 2237f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 22381da177e4SLinus Torvalds fdata->start_unit == 0) { 22391da177e4SLinus Torvalds if (i < 3) { 22401da177e4SLinus Torvalds ect->kl = 4; 22411da177e4SLinus Torvalds ect->dl = sizes_trk0[i] - 4; 22421da177e4SLinus Torvalds } 22431da177e4SLinus Torvalds } 2244f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 22451da177e4SLinus Torvalds fdata->start_unit == 1) { 22461da177e4SLinus Torvalds ect->kl = 44; 22471da177e4SLinus Torvalds ect->dl = LABEL_SIZE - 44; 22481da177e4SLinus Torvalds } 22491da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 2250d42e1712SStefan Haberland if (i != 0 || j == 0) 2251d42e1712SStefan Haberland ccw->cmd_code = 2252d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD; 2253d42e1712SStefan Haberland else 2254d42e1712SStefan Haberland ccw->cmd_code = 2255d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD_MT; 22561da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 22571da177e4SLinus Torvalds ccw->count = 8; 22581da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 22591da177e4SLinus Torvalds ccw++; 22601da177e4SLinus Torvalds } 22611da177e4SLinus Torvalds } 2262d42e1712SStefan Haberland } 2263d42e1712SStefan Haberland 2264d42e1712SStefan Haberland fcp->startdev = startdev; 2265d42e1712SStefan Haberland fcp->memdev = startdev; 2266eb6e199bSStefan Weinhuber fcp->retries = 256; 2267d42e1712SStefan Haberland fcp->expires = startdev->default_expires * HZ; 22681aae0560SHeiko Carstens fcp->buildclk = get_tod_clock(); 22691da177e4SLinus Torvalds fcp->status = DASD_CQR_FILLED; 2270d42e1712SStefan Haberland 22711da177e4SLinus Torvalds return fcp; 22721da177e4SLinus Torvalds } 22731da177e4SLinus Torvalds 2274d42e1712SStefan Haberland static int 2275d42e1712SStefan Haberland dasd_eckd_format_device(struct dasd_device *base, 2276d42e1712SStefan Haberland struct format_data_t *fdata) 2277d42e1712SStefan Haberland { 2278d42e1712SStefan Haberland struct dasd_ccw_req *cqr, *n; 2279d42e1712SStefan Haberland struct dasd_block *block; 2280d42e1712SStefan Haberland struct dasd_eckd_private *private; 2281d42e1712SStefan Haberland struct list_head format_queue; 2282d42e1712SStefan Haberland struct dasd_device *device; 2283d42e1712SStefan Haberland int old_stop, format_step; 2284d42e1712SStefan Haberland int step, rc = 0; 2285d42e1712SStefan Haberland 2286d42e1712SStefan Haberland block = base->block; 2287d42e1712SStefan Haberland private = (struct dasd_eckd_private *) base->private; 2288d42e1712SStefan Haberland 2289d42e1712SStefan Haberland /* Sanity checks. */ 2290d42e1712SStefan Haberland if (fdata->start_unit >= 2291d42e1712SStefan Haberland (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2292d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2293d42e1712SStefan Haberland "Start track number %u used in formatting is too big\n", 2294d42e1712SStefan Haberland fdata->start_unit); 2295d42e1712SStefan Haberland return -EINVAL; 2296d42e1712SStefan Haberland } 2297d42e1712SStefan Haberland if (fdata->stop_unit >= 2298d42e1712SStefan Haberland (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2299d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2300d42e1712SStefan Haberland "Stop track number %u used in formatting is too big\n", 2301d42e1712SStefan Haberland fdata->stop_unit); 2302d42e1712SStefan Haberland return -EINVAL; 2303d42e1712SStefan Haberland } 2304d42e1712SStefan Haberland if (fdata->start_unit > fdata->stop_unit) { 2305d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2306d42e1712SStefan Haberland "Start track %u used in formatting exceeds end track\n", 2307d42e1712SStefan Haberland fdata->start_unit); 2308d42e1712SStefan Haberland return -EINVAL; 2309d42e1712SStefan Haberland } 2310d42e1712SStefan Haberland if (dasd_check_blocksize(fdata->blksize) != 0) { 2311d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2312d42e1712SStefan Haberland "The DASD cannot be formatted with block size %u\n", 2313d42e1712SStefan Haberland fdata->blksize); 2314d42e1712SStefan Haberland return -EINVAL; 2315d42e1712SStefan Haberland } 2316d42e1712SStefan Haberland 2317d42e1712SStefan Haberland INIT_LIST_HEAD(&format_queue); 2318d42e1712SStefan Haberland old_stop = fdata->stop_unit; 2319d42e1712SStefan Haberland 2320d42e1712SStefan Haberland while (fdata->start_unit <= 1) { 2321d42e1712SStefan Haberland fdata->stop_unit = fdata->start_unit; 2322d42e1712SStefan Haberland cqr = dasd_eckd_build_format(base, fdata); 2323d42e1712SStefan Haberland list_add(&cqr->blocklist, &format_queue); 2324d42e1712SStefan Haberland 2325d42e1712SStefan Haberland fdata->stop_unit = old_stop; 2326d42e1712SStefan Haberland fdata->start_unit++; 2327d42e1712SStefan Haberland 2328d42e1712SStefan Haberland if (fdata->start_unit > fdata->stop_unit) 2329d42e1712SStefan Haberland goto sleep; 2330d42e1712SStefan Haberland } 2331d42e1712SStefan Haberland 2332d42e1712SStefan Haberland retry: 2333d42e1712SStefan Haberland format_step = 255 / recs_per_track(&private->rdc_data, 0, 2334d42e1712SStefan Haberland fdata->blksize); 2335d42e1712SStefan Haberland while (fdata->start_unit <= old_stop) { 2336d42e1712SStefan Haberland step = fdata->stop_unit - fdata->start_unit + 1; 2337d42e1712SStefan Haberland if (step > format_step) 2338d42e1712SStefan Haberland fdata->stop_unit = fdata->start_unit + format_step - 1; 2339d42e1712SStefan Haberland 2340d42e1712SStefan Haberland cqr = dasd_eckd_build_format(base, fdata); 2341d42e1712SStefan Haberland if (IS_ERR(cqr)) { 2342d42e1712SStefan Haberland if (PTR_ERR(cqr) == -ENOMEM) { 2343d42e1712SStefan Haberland /* 2344d42e1712SStefan Haberland * not enough memory available 2345d42e1712SStefan Haberland * go to out and start requests 2346d42e1712SStefan Haberland * retry after first requests were finished 2347d42e1712SStefan Haberland */ 2348d42e1712SStefan Haberland fdata->stop_unit = old_stop; 2349d42e1712SStefan Haberland goto sleep; 2350d42e1712SStefan Haberland } else 2351d42e1712SStefan Haberland return PTR_ERR(cqr); 2352d42e1712SStefan Haberland } 2353d42e1712SStefan Haberland list_add(&cqr->blocklist, &format_queue); 2354d42e1712SStefan Haberland 2355d42e1712SStefan Haberland fdata->start_unit = fdata->stop_unit + 1; 2356d42e1712SStefan Haberland fdata->stop_unit = old_stop; 2357d42e1712SStefan Haberland } 2358d42e1712SStefan Haberland 2359d42e1712SStefan Haberland sleep: 2360d42e1712SStefan Haberland dasd_sleep_on_queue(&format_queue); 2361d42e1712SStefan Haberland 2362d42e1712SStefan Haberland list_for_each_entry_safe(cqr, n, &format_queue, blocklist) { 2363d42e1712SStefan Haberland device = cqr->startdev; 2364d42e1712SStefan Haberland private = (struct dasd_eckd_private *) device->private; 2365d42e1712SStefan Haberland if (cqr->status == DASD_CQR_FAILED) 2366d42e1712SStefan Haberland rc = -EIO; 2367d42e1712SStefan Haberland list_del_init(&cqr->blocklist); 2368d42e1712SStefan Haberland dasd_sfree_request(cqr, device); 2369d42e1712SStefan Haberland private->count--; 2370d42e1712SStefan Haberland } 2371d42e1712SStefan Haberland 2372d42e1712SStefan Haberland /* 2373d42e1712SStefan Haberland * in case of ENOMEM we need to retry after 2374d42e1712SStefan Haberland * first requests are finished 2375d42e1712SStefan Haberland */ 2376d42e1712SStefan Haberland if (fdata->start_unit <= fdata->stop_unit) 2377d42e1712SStefan Haberland goto retry; 2378d42e1712SStefan Haberland 2379d42e1712SStefan Haberland return rc; 2380d42e1712SStefan Haberland } 2381d42e1712SStefan Haberland 23828e09f215SStefan Weinhuber static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 23831da177e4SLinus Torvalds { 2384a2ace466SHannes Reinecke if (cqr->retries < 0) { 2385a2ace466SHannes Reinecke cqr->status = DASD_CQR_FAILED; 2386a2ace466SHannes Reinecke return; 2387a2ace466SHannes Reinecke } 23888e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 23898e09f215SStefan Weinhuber if (cqr->block && (cqr->startdev != cqr->block->base)) { 23908e09f215SStefan Weinhuber dasd_eckd_reset_ccw_to_base_io(cqr); 23918e09f215SStefan Weinhuber cqr->startdev = cqr->block->base; 2392a4d26c6aSStefan Weinhuber cqr->lpm = cqr->block->base->path_data.opm; 23931da177e4SLinus Torvalds } 23948e09f215SStefan Weinhuber }; 23951da177e4SLinus Torvalds 23961da177e4SLinus Torvalds static dasd_erp_fn_t 23971da177e4SLinus Torvalds dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 23981da177e4SLinus Torvalds { 23998e09f215SStefan Weinhuber struct dasd_device *device = (struct dasd_device *) cqr->startdev; 24001da177e4SLinus Torvalds struct ccw_device *cdev = device->cdev; 24011da177e4SLinus Torvalds 24021da177e4SLinus Torvalds switch (cdev->id.cu_type) { 24031da177e4SLinus Torvalds case 0x3990: 24041da177e4SLinus Torvalds case 0x2105: 24051da177e4SLinus Torvalds case 0x2107: 24061da177e4SLinus Torvalds case 0x1750: 24071da177e4SLinus Torvalds return dasd_3990_erp_action; 24081da177e4SLinus Torvalds case 0x9343: 24091da177e4SLinus Torvalds case 0x3880: 24101da177e4SLinus Torvalds default: 24111da177e4SLinus Torvalds return dasd_default_erp_action; 24121da177e4SLinus Torvalds } 24131da177e4SLinus Torvalds } 24141da177e4SLinus Torvalds 24151da177e4SLinus Torvalds static dasd_erp_fn_t 24161da177e4SLinus Torvalds dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 24171da177e4SLinus Torvalds { 24181da177e4SLinus Torvalds return dasd_default_erp_postaction; 24191da177e4SLinus Torvalds } 24201da177e4SLinus Torvalds 24215a27e60dSStefan Weinhuber static void dasd_eckd_check_for_device_change(struct dasd_device *device, 24225a27e60dSStefan Weinhuber struct dasd_ccw_req *cqr, 24238e09f215SStefan Weinhuber struct irb *irb) 24248e09f215SStefan Weinhuber { 24258e09f215SStefan Weinhuber char mask; 2426f3eb5384SStefan Weinhuber char *sense = NULL; 2427501183f2SStefan Haberland struct dasd_eckd_private *private; 24288e09f215SStefan Weinhuber 2429501183f2SStefan Haberland private = (struct dasd_eckd_private *) device->private; 24308e09f215SStefan Weinhuber /* first of all check for state change pending interrupt */ 24318e09f215SStefan Weinhuber mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 2432f3eb5384SStefan Weinhuber if ((scsw_dstat(&irb->scsw) & mask) == mask) { 2433c8d1c0ffSStefan Haberland /* 2434c8d1c0ffSStefan Haberland * for alias only, not in offline processing 2435c8d1c0ffSStefan Haberland * and only if not suspended 2436c8d1c0ffSStefan Haberland */ 2437501183f2SStefan Haberland if (!device->block && private->lcu && 243825e2cf1cSStefan Haberland device->state == DASD_STATE_ONLINE && 2439c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_OFFLINE, &device->flags) && 2440c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 2441501183f2SStefan Haberland /* 2442501183f2SStefan Haberland * the state change could be caused by an alias 2443501183f2SStefan Haberland * reassignment remove device from alias handling 2444501183f2SStefan Haberland * to prevent new requests from being scheduled on 2445501183f2SStefan Haberland * the wrong alias device 2446501183f2SStefan Haberland */ 2447501183f2SStefan Haberland dasd_alias_remove_device(device); 2448501183f2SStefan Haberland 2449501183f2SStefan Haberland /* schedule worker to reload device */ 2450501183f2SStefan Haberland dasd_reload_device(device); 2451501183f2SStefan Haberland } 24528e09f215SStefan Weinhuber dasd_generic_handle_state_change(device); 24538e09f215SStefan Weinhuber return; 24548e09f215SStefan Weinhuber } 24558e09f215SStefan Weinhuber 2456a5a0061fSStefan Weinhuber sense = dasd_get_sense(irb); 24575a27e60dSStefan Weinhuber if (!sense) 24585a27e60dSStefan Weinhuber return; 24595a27e60dSStefan Weinhuber 24605a27e60dSStefan Weinhuber /* summary unit check */ 2461c7a29e56SStefan Weinhuber if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) && 2462a5a0061fSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { 24638e09f215SStefan Weinhuber dasd_alias_handle_summary_unit_check(device, irb); 24648e09f215SStefan Weinhuber return; 24658e09f215SStefan Weinhuber } 24668e09f215SStefan Weinhuber 2467f60c768cSStefan Haberland /* service information message SIM */ 24685a27e60dSStefan Weinhuber if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && 2469f3eb5384SStefan Weinhuber ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 2470f3eb5384SStefan Weinhuber dasd_3990_erp_handle_sim(device, sense); 2471f60c768cSStefan Haberland return; 2472f60c768cSStefan Haberland } 2473f60c768cSStefan Haberland 24745a27e60dSStefan Weinhuber /* loss of device reservation is handled via base devices only 24755a27e60dSStefan Weinhuber * as alias devices may be used with several bases 24765a27e60dSStefan Weinhuber */ 2477c7a29e56SStefan Weinhuber if (device->block && (sense[27] & DASD_SENSE_BIT_0) && 2478c7a29e56SStefan Weinhuber (sense[7] == 0x3F) && 24795a27e60dSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && 24805a27e60dSStefan Weinhuber test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { 24815a27e60dSStefan Weinhuber if (device->features & DASD_FEATURE_FAILONSLCK) 24825a27e60dSStefan Weinhuber set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); 24835a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 24845a27e60dSStefan Weinhuber dev_err(&device->cdev->dev, 24855a27e60dSStefan Weinhuber "The device reservation was lost\n"); 2486ada3df91SStefan Haberland } 24875a27e60dSStefan Weinhuber } 2488f3eb5384SStefan Weinhuber 2489f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( 2490f3eb5384SStefan Weinhuber struct dasd_device *startdev, 24918e09f215SStefan Weinhuber struct dasd_block *block, 2492f3eb5384SStefan Weinhuber struct request *req, 2493f3eb5384SStefan Weinhuber sector_t first_rec, 2494f3eb5384SStefan Weinhuber sector_t last_rec, 2495f3eb5384SStefan Weinhuber sector_t first_trk, 2496f3eb5384SStefan Weinhuber sector_t last_trk, 2497f3eb5384SStefan Weinhuber unsigned int first_offs, 2498f3eb5384SStefan Weinhuber unsigned int last_offs, 2499f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 2500f3eb5384SStefan Weinhuber unsigned int blksize) 25011da177e4SLinus Torvalds { 25021da177e4SLinus Torvalds struct dasd_eckd_private *private; 25031da177e4SLinus Torvalds unsigned long *idaws; 25041da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 25051da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 25061da177e4SLinus Torvalds struct ccw1 *ccw; 25075705f702SNeilBrown struct req_iterator iter; 25081da177e4SLinus Torvalds struct bio_vec *bv; 25091da177e4SLinus Torvalds char *dst; 2510f3eb5384SStefan Weinhuber unsigned int off; 25111da177e4SLinus Torvalds int count, cidaw, cplength, datasize; 2512f3eb5384SStefan Weinhuber sector_t recid; 25131da177e4SLinus Torvalds unsigned char cmd, rcmd; 25148e09f215SStefan Weinhuber int use_prefix; 25158e09f215SStefan Weinhuber struct dasd_device *basedev; 25161da177e4SLinus Torvalds 25178e09f215SStefan Weinhuber basedev = block->base; 25188e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 25191da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 25201da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_READ_MT; 25211da177e4SLinus Torvalds else if (rq_data_dir(req) == WRITE) 25221da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_WRITE_MT; 25231da177e4SLinus Torvalds else 25241da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 2525f3eb5384SStefan Weinhuber 25261da177e4SLinus Torvalds /* Check struct bio and count the number of blocks for the request. */ 25271da177e4SLinus Torvalds count = 0; 25281da177e4SLinus Torvalds cidaw = 0; 25295705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 25301da177e4SLinus Torvalds if (bv->bv_len & (blksize - 1)) 25311da177e4SLinus Torvalds /* Eckd can only do full blocks. */ 25321da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 25338e09f215SStefan Weinhuber count += bv->bv_len >> (block->s2b_shift + 9); 2534347a8dc3SMartin Schwidefsky #if defined(CONFIG_64BIT) 25356c92e699SJens Axboe if (idal_is_needed (page_address(bv->bv_page), bv->bv_len)) 25368e09f215SStefan Weinhuber cidaw += bv->bv_len >> (block->s2b_shift + 9); 25371da177e4SLinus Torvalds #endif 25381da177e4SLinus Torvalds } 25391da177e4SLinus Torvalds /* Paranoia. */ 25401da177e4SLinus Torvalds if (count != last_rec - first_rec + 1) 25411da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 25428e09f215SStefan Weinhuber 25438e09f215SStefan Weinhuber /* use the prefix command if available */ 25448e09f215SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 25458e09f215SStefan Weinhuber if (use_prefix) { 25468e09f215SStefan Weinhuber /* 1x prefix + number of blocks */ 25478e09f215SStefan Weinhuber cplength = 2 + count; 25488e09f215SStefan Weinhuber /* 1x prefix + cidaws*sizeof(long) */ 25498e09f215SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 25508e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 25518e09f215SStefan Weinhuber cidaw * sizeof(unsigned long); 25528e09f215SStefan Weinhuber } else { 25531da177e4SLinus Torvalds /* 1x define extent + 1x locate record + number of blocks */ 25541da177e4SLinus Torvalds cplength = 2 + count; 25551da177e4SLinus Torvalds /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 25568e09f215SStefan Weinhuber datasize = sizeof(struct DE_eckd_data) + 25578e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 25581da177e4SLinus Torvalds cidaw * sizeof(unsigned long); 25598e09f215SStefan Weinhuber } 25601da177e4SLinus Torvalds /* Find out the number of additional locate record ccws for cdl. */ 25611da177e4SLinus Torvalds if (private->uses_cdl && first_rec < 2*blk_per_trk) { 25621da177e4SLinus Torvalds if (last_rec >= 2*blk_per_trk) 25631da177e4SLinus Torvalds count = 2*blk_per_trk - first_rec; 25641da177e4SLinus Torvalds cplength += count; 25651da177e4SLinus Torvalds datasize += count*sizeof(struct LO_eckd_data); 25661da177e4SLinus Torvalds } 25671da177e4SLinus Torvalds /* Allocate the ccw request. */ 256868b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 256968b781feSStefan Haberland startdev); 25701da177e4SLinus Torvalds if (IS_ERR(cqr)) 25711da177e4SLinus Torvalds return cqr; 25721da177e4SLinus Torvalds ccw = cqr->cpaddr; 25738e09f215SStefan Weinhuber /* First ccw is define extent or prefix. */ 25748e09f215SStefan Weinhuber if (use_prefix) { 25758e09f215SStefan Weinhuber if (prefix(ccw++, cqr->data, first_trk, 25768e09f215SStefan Weinhuber last_trk, cmd, basedev, startdev) == -EAGAIN) { 25778e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 25788e09f215SStefan Weinhuber * Try again later. 25798e09f215SStefan Weinhuber */ 25808e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2581d54853efSMartin Schwidefsky return ERR_PTR(-EAGAIN); 2582d54853efSMartin Schwidefsky } 25838e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 25848e09f215SStefan Weinhuber sizeof(struct PFX_eckd_data)); 25858e09f215SStefan Weinhuber } else { 25868e09f215SStefan Weinhuber if (define_extent(ccw++, cqr->data, first_trk, 2587b38f27e8SStefan Haberland last_trk, cmd, basedev) == -EAGAIN) { 25888e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 25898e09f215SStefan Weinhuber * Try again later. 25908e09f215SStefan Weinhuber */ 25918e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 25928e09f215SStefan Weinhuber return ERR_PTR(-EAGAIN); 25938e09f215SStefan Weinhuber } 25948e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 25958e09f215SStefan Weinhuber sizeof(struct DE_eckd_data)); 25968e09f215SStefan Weinhuber } 25971da177e4SLinus Torvalds /* Build locate_record+read/write/ccws. */ 25981da177e4SLinus Torvalds LO_data = (struct LO_eckd_data *) (idaws + cidaw); 25991da177e4SLinus Torvalds recid = first_rec; 26001da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 26011da177e4SLinus Torvalds /* Only standard blocks so there is just one locate record. */ 26021da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 26031da177e4SLinus Torvalds locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 26048e09f215SStefan Weinhuber last_rec - recid + 1, cmd, basedev, blksize); 26051da177e4SLinus Torvalds } 26065705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 26071da177e4SLinus Torvalds dst = page_address(bv->bv_page) + bv->bv_offset; 26081da177e4SLinus Torvalds if (dasd_page_cache) { 26091da177e4SLinus Torvalds char *copy = kmem_cache_alloc(dasd_page_cache, 2610441e143eSChristoph Lameter GFP_DMA | __GFP_NOWARN); 26111da177e4SLinus Torvalds if (copy && rq_data_dir(req) == WRITE) 26121da177e4SLinus Torvalds memcpy(copy + bv->bv_offset, dst, bv->bv_len); 26131da177e4SLinus Torvalds if (copy) 26141da177e4SLinus Torvalds dst = copy + bv->bv_offset; 26151da177e4SLinus Torvalds } 26161da177e4SLinus Torvalds for (off = 0; off < bv->bv_len; off += blksize) { 26171da177e4SLinus Torvalds sector_t trkid = recid; 26181da177e4SLinus Torvalds unsigned int recoffs = sector_div(trkid, blk_per_trk); 26191da177e4SLinus Torvalds rcmd = cmd; 26201da177e4SLinus Torvalds count = blksize; 26211da177e4SLinus Torvalds /* Locate record for cdl special block ? */ 26221da177e4SLinus Torvalds if (private->uses_cdl && recid < 2*blk_per_trk) { 26231da177e4SLinus Torvalds if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 26241da177e4SLinus Torvalds rcmd |= 0x8; 26251da177e4SLinus Torvalds count = dasd_eckd_cdl_reclen(recid); 2626ec5883abSHorst Hummel if (count < blksize && 2627ec5883abSHorst Hummel rq_data_dir(req) == READ) 26281da177e4SLinus Torvalds memset(dst + count, 0xe5, 26291da177e4SLinus Torvalds blksize - count); 26301da177e4SLinus Torvalds } 26311da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 26321da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 26331da177e4SLinus Torvalds trkid, recoffs + 1, 26348e09f215SStefan Weinhuber 1, rcmd, basedev, count); 26351da177e4SLinus Torvalds } 26361da177e4SLinus Torvalds /* Locate record for standard blocks ? */ 26371da177e4SLinus Torvalds if (private->uses_cdl && recid == 2*blk_per_trk) { 26381da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 26391da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 26401da177e4SLinus Torvalds trkid, recoffs + 1, 26411da177e4SLinus Torvalds last_rec - recid + 1, 26428e09f215SStefan Weinhuber cmd, basedev, count); 26431da177e4SLinus Torvalds } 26441da177e4SLinus Torvalds /* Read/write ccw. */ 26451da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 26461da177e4SLinus Torvalds ccw->cmd_code = rcmd; 26471da177e4SLinus Torvalds ccw->count = count; 26481da177e4SLinus Torvalds if (idal_is_needed(dst, blksize)) { 26491da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) idaws; 26501da177e4SLinus Torvalds ccw->flags = CCW_FLAG_IDA; 26511da177e4SLinus Torvalds idaws = idal_create_words(idaws, dst, blksize); 26521da177e4SLinus Torvalds } else { 26531da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) dst; 26541da177e4SLinus Torvalds ccw->flags = 0; 26551da177e4SLinus Torvalds } 26561da177e4SLinus Torvalds ccw++; 26571da177e4SLinus Torvalds dst += blksize; 26581da177e4SLinus Torvalds recid++; 26591da177e4SLinus Torvalds } 26601da177e4SLinus Torvalds } 266113de227bSHolger Smolinski if (blk_noretry_request(req) || 266213de227bSHolger Smolinski block->base->features & DASD_FEATURE_FAILFAST) 26631c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 26648e09f215SStefan Weinhuber cqr->startdev = startdev; 26658e09f215SStefan Weinhuber cqr->memdev = startdev; 26668e09f215SStefan Weinhuber cqr->block = block; 26677c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2668a4d26c6aSStefan Weinhuber cqr->lpm = startdev->path_data.ppm; 26691f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 26701aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 26711da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 26721da177e4SLinus Torvalds return cqr; 26731da177e4SLinus Torvalds } 26741da177e4SLinus Torvalds 2675f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 2676f3eb5384SStefan Weinhuber struct dasd_device *startdev, 2677f3eb5384SStefan Weinhuber struct dasd_block *block, 2678f3eb5384SStefan Weinhuber struct request *req, 2679f3eb5384SStefan Weinhuber sector_t first_rec, 2680f3eb5384SStefan Weinhuber sector_t last_rec, 2681f3eb5384SStefan Weinhuber sector_t first_trk, 2682f3eb5384SStefan Weinhuber sector_t last_trk, 2683f3eb5384SStefan Weinhuber unsigned int first_offs, 2684f3eb5384SStefan Weinhuber unsigned int last_offs, 2685f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 2686f3eb5384SStefan Weinhuber unsigned int blksize) 2687f3eb5384SStefan Weinhuber { 2688f3eb5384SStefan Weinhuber unsigned long *idaws; 2689f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 2690f3eb5384SStefan Weinhuber struct ccw1 *ccw; 2691f3eb5384SStefan Weinhuber struct req_iterator iter; 2692f3eb5384SStefan Weinhuber struct bio_vec *bv; 2693f3eb5384SStefan Weinhuber char *dst, *idaw_dst; 2694f3eb5384SStefan Weinhuber unsigned int cidaw, cplength, datasize; 2695f3eb5384SStefan Weinhuber unsigned int tlf; 2696f3eb5384SStefan Weinhuber sector_t recid; 2697f3eb5384SStefan Weinhuber unsigned char cmd; 2698f3eb5384SStefan Weinhuber struct dasd_device *basedev; 2699f3eb5384SStefan Weinhuber unsigned int trkcount, count, count_to_trk_end; 2700f3eb5384SStefan Weinhuber unsigned int idaw_len, seg_len, part_len, len_to_track_end; 2701f3eb5384SStefan Weinhuber unsigned char new_track, end_idaw; 2702f3eb5384SStefan Weinhuber sector_t trkid; 2703f3eb5384SStefan Weinhuber unsigned int recoffs; 2704f3eb5384SStefan Weinhuber 2705f3eb5384SStefan Weinhuber basedev = block->base; 2706f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) 2707f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 2708f3eb5384SStefan Weinhuber else if (rq_data_dir(req) == WRITE) 2709f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 2710f3eb5384SStefan Weinhuber else 2711f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 2712f3eb5384SStefan Weinhuber 2713f3eb5384SStefan Weinhuber /* Track based I/O needs IDAWs for each page, and not just for 2714f3eb5384SStefan Weinhuber * 64 bit addresses. We need additional idals for pages 2715f3eb5384SStefan Weinhuber * that get filled from two tracks, so we use the number 2716f3eb5384SStefan Weinhuber * of records as upper limit. 2717f3eb5384SStefan Weinhuber */ 2718f3eb5384SStefan Weinhuber cidaw = last_rec - first_rec + 1; 2719f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 2720f3eb5384SStefan Weinhuber 2721f3eb5384SStefan Weinhuber /* 1x prefix + one read/write ccw per track */ 2722f3eb5384SStefan Weinhuber cplength = 1 + trkcount; 2723f3eb5384SStefan Weinhuber 2724f3eb5384SStefan Weinhuber /* on 31-bit we need space for two 32 bit addresses per page 2725f3eb5384SStefan Weinhuber * on 64-bit one 64 bit address 2726f3eb5384SStefan Weinhuber */ 2727f3eb5384SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 2728f3eb5384SStefan Weinhuber cidaw * sizeof(unsigned long long); 2729f3eb5384SStefan Weinhuber 2730f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 273168b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 273268b781feSStefan Haberland startdev); 2733f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 2734f3eb5384SStefan Weinhuber return cqr; 2735f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 2736f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 2737f3eb5384SStefan Weinhuber if (first_trk == last_trk) 2738f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 2739f3eb5384SStefan Weinhuber else 2740f3eb5384SStefan Weinhuber tlf = last_offs + 1; 2741f3eb5384SStefan Weinhuber tlf *= blksize; 2742f3eb5384SStefan Weinhuber 2743f3eb5384SStefan Weinhuber if (prefix_LRE(ccw++, cqr->data, first_trk, 2744f3eb5384SStefan Weinhuber last_trk, cmd, basedev, startdev, 2745f3eb5384SStefan Weinhuber 1 /* format */, first_offs + 1, 2746f3eb5384SStefan Weinhuber trkcount, blksize, 2747f3eb5384SStefan Weinhuber tlf) == -EAGAIN) { 2748f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 2749f3eb5384SStefan Weinhuber * Try again later. 2750f3eb5384SStefan Weinhuber */ 2751f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2752f3eb5384SStefan Weinhuber return ERR_PTR(-EAGAIN); 2753f3eb5384SStefan Weinhuber } 2754f3eb5384SStefan Weinhuber 2755f3eb5384SStefan Weinhuber /* 2756f3eb5384SStefan Weinhuber * The translation of request into ccw programs must meet the 2757f3eb5384SStefan Weinhuber * following conditions: 2758f3eb5384SStefan Weinhuber * - all idaws but the first and the last must address full pages 2759f3eb5384SStefan Weinhuber * (or 2K blocks on 31-bit) 2760f3eb5384SStefan Weinhuber * - the scope of a ccw and it's idal ends with the track boundaries 2761f3eb5384SStefan Weinhuber */ 2762f3eb5384SStefan Weinhuber idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); 2763f3eb5384SStefan Weinhuber recid = first_rec; 2764f3eb5384SStefan Weinhuber new_track = 1; 2765f3eb5384SStefan Weinhuber end_idaw = 0; 2766f3eb5384SStefan Weinhuber len_to_track_end = 0; 2767246ccea1SMartin Schwidefsky idaw_dst = NULL; 2768f3eb5384SStefan Weinhuber idaw_len = 0; 2769f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 2770f3eb5384SStefan Weinhuber dst = page_address(bv->bv_page) + bv->bv_offset; 2771f3eb5384SStefan Weinhuber seg_len = bv->bv_len; 2772f3eb5384SStefan Weinhuber while (seg_len) { 2773f3eb5384SStefan Weinhuber if (new_track) { 2774f3eb5384SStefan Weinhuber trkid = recid; 2775f3eb5384SStefan Weinhuber recoffs = sector_div(trkid, blk_per_trk); 2776f3eb5384SStefan Weinhuber count_to_trk_end = blk_per_trk - recoffs; 2777f3eb5384SStefan Weinhuber count = min((last_rec - recid + 1), 2778f3eb5384SStefan Weinhuber (sector_t)count_to_trk_end); 2779f3eb5384SStefan Weinhuber len_to_track_end = count * blksize; 2780f3eb5384SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 2781f3eb5384SStefan Weinhuber ccw->cmd_code = cmd; 2782f3eb5384SStefan Weinhuber ccw->count = len_to_track_end; 2783f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 2784f3eb5384SStefan Weinhuber ccw->flags = CCW_FLAG_IDA; 2785f3eb5384SStefan Weinhuber ccw++; 2786f3eb5384SStefan Weinhuber recid += count; 2787f3eb5384SStefan Weinhuber new_track = 0; 278852db45c3SStefan Weinhuber /* first idaw for a ccw may start anywhere */ 278952db45c3SStefan Weinhuber if (!idaw_dst) 279052db45c3SStefan Weinhuber idaw_dst = dst; 2791f3eb5384SStefan Weinhuber } 279252db45c3SStefan Weinhuber /* If we start a new idaw, we must make sure that it 279352db45c3SStefan Weinhuber * starts on an IDA_BLOCK_SIZE boundary. 2794f3eb5384SStefan Weinhuber * If we continue an idaw, we must make sure that the 2795f3eb5384SStefan Weinhuber * current segment begins where the so far accumulated 2796f3eb5384SStefan Weinhuber * idaw ends 2797f3eb5384SStefan Weinhuber */ 279852db45c3SStefan Weinhuber if (!idaw_dst) { 279952db45c3SStefan Weinhuber if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { 280052db45c3SStefan Weinhuber dasd_sfree_request(cqr, startdev); 280152db45c3SStefan Weinhuber return ERR_PTR(-ERANGE); 280252db45c3SStefan Weinhuber } else 2803f3eb5384SStefan Weinhuber idaw_dst = dst; 280452db45c3SStefan Weinhuber } 2805f3eb5384SStefan Weinhuber if ((idaw_dst + idaw_len) != dst) { 2806f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2807f3eb5384SStefan Weinhuber return ERR_PTR(-ERANGE); 2808f3eb5384SStefan Weinhuber } 2809f3eb5384SStefan Weinhuber part_len = min(seg_len, len_to_track_end); 2810f3eb5384SStefan Weinhuber seg_len -= part_len; 2811f3eb5384SStefan Weinhuber dst += part_len; 2812f3eb5384SStefan Weinhuber idaw_len += part_len; 2813f3eb5384SStefan Weinhuber len_to_track_end -= part_len; 2814f3eb5384SStefan Weinhuber /* collected memory area ends on an IDA_BLOCK border, 2815f3eb5384SStefan Weinhuber * -> create an idaw 2816f3eb5384SStefan Weinhuber * idal_create_words will handle cases where idaw_len 2817f3eb5384SStefan Weinhuber * is larger then IDA_BLOCK_SIZE 2818f3eb5384SStefan Weinhuber */ 2819f3eb5384SStefan Weinhuber if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) 2820f3eb5384SStefan Weinhuber end_idaw = 1; 2821f3eb5384SStefan Weinhuber /* We also need to end the idaw at track end */ 2822f3eb5384SStefan Weinhuber if (!len_to_track_end) { 2823f3eb5384SStefan Weinhuber new_track = 1; 2824f3eb5384SStefan Weinhuber end_idaw = 1; 2825f3eb5384SStefan Weinhuber } 2826f3eb5384SStefan Weinhuber if (end_idaw) { 2827f3eb5384SStefan Weinhuber idaws = idal_create_words(idaws, idaw_dst, 2828f3eb5384SStefan Weinhuber idaw_len); 2829246ccea1SMartin Schwidefsky idaw_dst = NULL; 2830f3eb5384SStefan Weinhuber idaw_len = 0; 2831f3eb5384SStefan Weinhuber end_idaw = 0; 2832f3eb5384SStefan Weinhuber } 2833f3eb5384SStefan Weinhuber } 2834f3eb5384SStefan Weinhuber } 2835f3eb5384SStefan Weinhuber 2836f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 2837f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 2838f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2839f3eb5384SStefan Weinhuber cqr->startdev = startdev; 2840f3eb5384SStefan Weinhuber cqr->memdev = startdev; 2841f3eb5384SStefan Weinhuber cqr->block = block; 28427c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2843a4d26c6aSStefan Weinhuber cqr->lpm = startdev->path_data.ppm; 28441f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 28451aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 2846f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 2847f3eb5384SStefan Weinhuber return cqr; 2848f3eb5384SStefan Weinhuber } 2849f3eb5384SStefan Weinhuber 2850f3eb5384SStefan Weinhuber static int prepare_itcw(struct itcw *itcw, 2851f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 2852f3eb5384SStefan Weinhuber struct dasd_device *basedev, 2853f3eb5384SStefan Weinhuber struct dasd_device *startdev, 2854f3eb5384SStefan Weinhuber unsigned int rec_on_trk, int count, 2855f3eb5384SStefan Weinhuber unsigned int blksize, 2856f3eb5384SStefan Weinhuber unsigned int total_data_size, 2857f3eb5384SStefan Weinhuber unsigned int tlf, 2858f3eb5384SStefan Weinhuber unsigned int blk_per_trk) 2859f3eb5384SStefan Weinhuber { 2860f3eb5384SStefan Weinhuber struct PFX_eckd_data pfxdata; 2861f3eb5384SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 2862f3eb5384SStefan Weinhuber struct DE_eckd_data *dedata; 2863f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 2864f3eb5384SStefan Weinhuber struct dcw *dcw; 2865f3eb5384SStefan Weinhuber 2866f3eb5384SStefan Weinhuber u32 begcyl, endcyl; 2867f3eb5384SStefan Weinhuber u16 heads, beghead, endhead; 2868f3eb5384SStefan Weinhuber u8 pfx_cmd; 2869f3eb5384SStefan Weinhuber 2870f3eb5384SStefan Weinhuber int rc = 0; 2871f3eb5384SStefan Weinhuber int sector = 0; 2872f3eb5384SStefan Weinhuber int dn, d; 2873f3eb5384SStefan Weinhuber 2874f3eb5384SStefan Weinhuber 2875f3eb5384SStefan Weinhuber /* setup prefix data */ 2876f3eb5384SStefan Weinhuber basepriv = (struct dasd_eckd_private *) basedev->private; 2877f3eb5384SStefan Weinhuber startpriv = (struct dasd_eckd_private *) startdev->private; 2878f3eb5384SStefan Weinhuber dedata = &pfxdata.define_extent; 2879f3eb5384SStefan Weinhuber lredata = &pfxdata.locate_record; 2880f3eb5384SStefan Weinhuber 2881f3eb5384SStefan Weinhuber memset(&pfxdata, 0, sizeof(pfxdata)); 2882f3eb5384SStefan Weinhuber pfxdata.format = 1; /* PFX with LRE */ 2883f3eb5384SStefan Weinhuber pfxdata.base_address = basepriv->ned->unit_addr; 2884f3eb5384SStefan Weinhuber pfxdata.base_lss = basepriv->ned->ID; 2885f3eb5384SStefan Weinhuber pfxdata.validity.define_extent = 1; 2886f3eb5384SStefan Weinhuber 2887f3eb5384SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 2888f3eb5384SStefan Weinhuber if (startpriv->uid.type != UA_BASE_DEVICE) { 2889f3eb5384SStefan Weinhuber pfxdata.validity.verify_base = 1; 2890f3eb5384SStefan Weinhuber if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 2891f3eb5384SStefan Weinhuber pfxdata.validity.hyper_pav = 1; 2892f3eb5384SStefan Weinhuber } 2893f3eb5384SStefan Weinhuber 2894f3eb5384SStefan Weinhuber switch (cmd) { 2895f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 2896f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 2897f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 2898f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 2899f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 2900f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 2901f3eb5384SStefan Weinhuber lredata->operation.operation = 0x0C; 2902f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x01; 2903f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX_READ; 2904f3eb5384SStefan Weinhuber break; 2905f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 2906f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 2907f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 2908f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 2909f3eb5384SStefan Weinhuber rc = check_XRC_on_prefix(&pfxdata, basedev); 2910f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 2911f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 2912f3eb5384SStefan Weinhuber lredata->operation.operation = 0x3F; 2913f3eb5384SStefan Weinhuber lredata->extended_operation = 0x23; 2914f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x2; 2915f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX; 2916f3eb5384SStefan Weinhuber break; 2917f3eb5384SStefan Weinhuber default: 2918f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 2919f3eb5384SStefan Weinhuber "prepare itcw, unknown opcode 0x%x", cmd); 2920f3eb5384SStefan Weinhuber BUG(); 2921f3eb5384SStefan Weinhuber break; 2922f3eb5384SStefan Weinhuber } 2923f3eb5384SStefan Weinhuber if (rc) 2924f3eb5384SStefan Weinhuber return rc; 2925f3eb5384SStefan Weinhuber 2926f3eb5384SStefan Weinhuber dedata->attributes.mode = 0x3; /* ECKD */ 2927f3eb5384SStefan Weinhuber 2928f3eb5384SStefan Weinhuber heads = basepriv->rdc_data.trk_per_cyl; 2929f3eb5384SStefan Weinhuber begcyl = trk / heads; 2930f3eb5384SStefan Weinhuber beghead = trk % heads; 2931f3eb5384SStefan Weinhuber endcyl = totrk / heads; 2932f3eb5384SStefan Weinhuber endhead = totrk % heads; 2933f3eb5384SStefan Weinhuber 2934f3eb5384SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 2935f3eb5384SStefan Weinhuber if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 2936f3eb5384SStefan Weinhuber dedata->attributes.operation == DASD_SEQ_ACCESS) { 2937f3eb5384SStefan Weinhuber 2938f3eb5384SStefan Weinhuber if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 2939f3eb5384SStefan Weinhuber endcyl += basepriv->attrib.nr_cyl; 2940f3eb5384SStefan Weinhuber else 2941f3eb5384SStefan Weinhuber endcyl = (basepriv->real_cyl - 1); 2942f3eb5384SStefan Weinhuber } 2943f3eb5384SStefan Weinhuber 2944f3eb5384SStefan Weinhuber set_ch_t(&dedata->beg_ext, begcyl, beghead); 2945f3eb5384SStefan Weinhuber set_ch_t(&dedata->end_ext, endcyl, endhead); 2946f3eb5384SStefan Weinhuber 2947f3eb5384SStefan Weinhuber dedata->ep_format = 0x20; /* records per track is valid */ 2948f3eb5384SStefan Weinhuber dedata->ep_rec_per_track = blk_per_trk; 2949f3eb5384SStefan Weinhuber 2950f3eb5384SStefan Weinhuber if (rec_on_trk) { 2951f3eb5384SStefan Weinhuber switch (basepriv->rdc_data.dev_type) { 2952f3eb5384SStefan Weinhuber case 0x3390: 2953f3eb5384SStefan Weinhuber dn = ceil_quot(blksize + 6, 232); 2954f3eb5384SStefan Weinhuber d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); 2955f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 2956f3eb5384SStefan Weinhuber break; 2957f3eb5384SStefan Weinhuber case 0x3380: 2958f3eb5384SStefan Weinhuber d = 7 + ceil_quot(blksize + 12, 32); 2959f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 2960f3eb5384SStefan Weinhuber break; 2961f3eb5384SStefan Weinhuber } 2962f3eb5384SStefan Weinhuber } 2963f3eb5384SStefan Weinhuber 2964f3eb5384SStefan Weinhuber lredata->auxiliary.length_valid = 1; 2965f3eb5384SStefan Weinhuber lredata->auxiliary.length_scope = 1; 2966f3eb5384SStefan Weinhuber lredata->auxiliary.imbedded_ccw_valid = 1; 2967f3eb5384SStefan Weinhuber lredata->length = tlf; 2968f3eb5384SStefan Weinhuber lredata->imbedded_ccw = cmd; 2969f3eb5384SStefan Weinhuber lredata->count = count; 2970f3eb5384SStefan Weinhuber lredata->sector = sector; 2971f3eb5384SStefan Weinhuber set_ch_t(&lredata->seek_addr, begcyl, beghead); 2972f3eb5384SStefan Weinhuber lredata->search_arg.cyl = lredata->seek_addr.cyl; 2973f3eb5384SStefan Weinhuber lredata->search_arg.head = lredata->seek_addr.head; 2974f3eb5384SStefan Weinhuber lredata->search_arg.record = rec_on_trk; 2975f3eb5384SStefan Weinhuber 2976f3eb5384SStefan Weinhuber dcw = itcw_add_dcw(itcw, pfx_cmd, 0, 2977f3eb5384SStefan Weinhuber &pfxdata, sizeof(pfxdata), total_data_size); 297882a7b955SThomas Meyer return PTR_RET(dcw); 2979f3eb5384SStefan Weinhuber } 2980f3eb5384SStefan Weinhuber 2981f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 2982f3eb5384SStefan Weinhuber struct dasd_device *startdev, 2983f3eb5384SStefan Weinhuber struct dasd_block *block, 2984f3eb5384SStefan Weinhuber struct request *req, 2985f3eb5384SStefan Weinhuber sector_t first_rec, 2986f3eb5384SStefan Weinhuber sector_t last_rec, 2987f3eb5384SStefan Weinhuber sector_t first_trk, 2988f3eb5384SStefan Weinhuber sector_t last_trk, 2989f3eb5384SStefan Weinhuber unsigned int first_offs, 2990f3eb5384SStefan Weinhuber unsigned int last_offs, 2991f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 2992f3eb5384SStefan Weinhuber unsigned int blksize) 2993f3eb5384SStefan Weinhuber { 2994f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 2995f3eb5384SStefan Weinhuber struct req_iterator iter; 2996f3eb5384SStefan Weinhuber struct bio_vec *bv; 2997f3eb5384SStefan Weinhuber char *dst; 2998f3eb5384SStefan Weinhuber unsigned int trkcount, ctidaw; 2999f3eb5384SStefan Weinhuber unsigned char cmd; 3000f3eb5384SStefan Weinhuber struct dasd_device *basedev; 3001f3eb5384SStefan Weinhuber unsigned int tlf; 3002f3eb5384SStefan Weinhuber struct itcw *itcw; 3003f3eb5384SStefan Weinhuber struct tidaw *last_tidaw = NULL; 3004f3eb5384SStefan Weinhuber int itcw_op; 3005f3eb5384SStefan Weinhuber size_t itcw_size; 3006ef19298bSStefan Weinhuber u8 tidaw_flags; 3007ef19298bSStefan Weinhuber unsigned int seg_len, part_len, len_to_track_end; 3008ef19298bSStefan Weinhuber unsigned char new_track; 3009ef19298bSStefan Weinhuber sector_t recid, trkid; 3010ef19298bSStefan Weinhuber unsigned int offs; 3011ef19298bSStefan Weinhuber unsigned int count, count_to_trk_end; 3012cd10502bSJulia Lawall int ret; 3013f3eb5384SStefan Weinhuber 3014f3eb5384SStefan Weinhuber basedev = block->base; 3015f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) { 3016f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 3017f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_READ; 3018f3eb5384SStefan Weinhuber } else if (rq_data_dir(req) == WRITE) { 3019f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 3020f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_WRITE; 3021f3eb5384SStefan Weinhuber } else 3022f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 3023f3eb5384SStefan Weinhuber 3024f3eb5384SStefan Weinhuber /* trackbased I/O needs address all memory via TIDAWs, 3025f3eb5384SStefan Weinhuber * not just for 64 bit addresses. This allows us to map 3026f3eb5384SStefan Weinhuber * each segment directly to one tidaw. 3027ef19298bSStefan Weinhuber * In the case of write requests, additional tidaws may 3028ef19298bSStefan Weinhuber * be needed when a segment crosses a track boundary. 3029f3eb5384SStefan Weinhuber */ 3030f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 3031f3eb5384SStefan Weinhuber ctidaw = 0; 3032f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 3033f3eb5384SStefan Weinhuber ++ctidaw; 3034f3eb5384SStefan Weinhuber } 3035ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 3036ef19298bSStefan Weinhuber ctidaw += (last_trk - first_trk); 3037f3eb5384SStefan Weinhuber 3038f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 3039f3eb5384SStefan Weinhuber itcw_size = itcw_calc_size(0, ctidaw, 0); 304068b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 3041f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 3042f3eb5384SStefan Weinhuber return cqr; 3043f3eb5384SStefan Weinhuber 3044f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 3045f3eb5384SStefan Weinhuber if (first_trk == last_trk) 3046f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 3047f3eb5384SStefan Weinhuber else 3048f3eb5384SStefan Weinhuber tlf = last_offs + 1; 3049f3eb5384SStefan Weinhuber tlf *= blksize; 3050f3eb5384SStefan Weinhuber 3051f3eb5384SStefan Weinhuber itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); 3052ef19298bSStefan Weinhuber if (IS_ERR(itcw)) { 3053cd10502bSJulia Lawall ret = -EINVAL; 3054cd10502bSJulia Lawall goto out_error; 3055ef19298bSStefan Weinhuber } 3056f3eb5384SStefan Weinhuber cqr->cpaddr = itcw_get_tcw(itcw); 3057f3eb5384SStefan Weinhuber if (prepare_itcw(itcw, first_trk, last_trk, 3058f3eb5384SStefan Weinhuber cmd, basedev, startdev, 3059f3eb5384SStefan Weinhuber first_offs + 1, 3060f3eb5384SStefan Weinhuber trkcount, blksize, 3061f3eb5384SStefan Weinhuber (last_rec - first_rec + 1) * blksize, 3062f3eb5384SStefan Weinhuber tlf, blk_per_trk) == -EAGAIN) { 3063f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 3064f3eb5384SStefan Weinhuber * Try again later. 3065f3eb5384SStefan Weinhuber */ 3066cd10502bSJulia Lawall ret = -EAGAIN; 3067cd10502bSJulia Lawall goto out_error; 3068f3eb5384SStefan Weinhuber } 3069d54cddb6SHeiko Carstens len_to_track_end = 0; 3070f3eb5384SStefan Weinhuber /* 3071f3eb5384SStefan Weinhuber * A tidaw can address 4k of memory, but must not cross page boundaries 3072f3eb5384SStefan Weinhuber * We can let the block layer handle this by setting 3073f3eb5384SStefan Weinhuber * blk_queue_segment_boundary to page boundaries and 3074f3eb5384SStefan Weinhuber * blk_max_segment_size to page size when setting up the request queue. 3075ef19298bSStefan Weinhuber * For write requests, a TIDAW must not cross track boundaries, because 3076ef19298bSStefan Weinhuber * we have to set the CBC flag on the last tidaw for each track. 3077f3eb5384SStefan Weinhuber */ 3078ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) { 3079ef19298bSStefan Weinhuber new_track = 1; 3080ef19298bSStefan Weinhuber recid = first_rec; 3081f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 3082f3eb5384SStefan Weinhuber dst = page_address(bv->bv_page) + bv->bv_offset; 3083ef19298bSStefan Weinhuber seg_len = bv->bv_len; 3084ef19298bSStefan Weinhuber while (seg_len) { 3085ef19298bSStefan Weinhuber if (new_track) { 3086ef19298bSStefan Weinhuber trkid = recid; 3087ef19298bSStefan Weinhuber offs = sector_div(trkid, blk_per_trk); 3088ef19298bSStefan Weinhuber count_to_trk_end = blk_per_trk - offs; 3089ef19298bSStefan Weinhuber count = min((last_rec - recid + 1), 3090ef19298bSStefan Weinhuber (sector_t)count_to_trk_end); 3091ef19298bSStefan Weinhuber len_to_track_end = count * blksize; 3092ef19298bSStefan Weinhuber recid += count; 3093ef19298bSStefan Weinhuber new_track = 0; 3094f3eb5384SStefan Weinhuber } 3095ef19298bSStefan Weinhuber part_len = min(seg_len, len_to_track_end); 3096ef19298bSStefan Weinhuber seg_len -= part_len; 3097ef19298bSStefan Weinhuber len_to_track_end -= part_len; 3098ef19298bSStefan Weinhuber /* We need to end the tidaw at track end */ 3099ef19298bSStefan Weinhuber if (!len_to_track_end) { 3100ef19298bSStefan Weinhuber new_track = 1; 3101ef19298bSStefan Weinhuber tidaw_flags = TIDAW_FLAGS_INSERT_CBC; 3102ef19298bSStefan Weinhuber } else 3103ef19298bSStefan Weinhuber tidaw_flags = 0; 3104ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, 3105ef19298bSStefan Weinhuber dst, part_len); 3106cd10502bSJulia Lawall if (IS_ERR(last_tidaw)) { 3107cd10502bSJulia Lawall ret = -EINVAL; 3108cd10502bSJulia Lawall goto out_error; 3109cd10502bSJulia Lawall } 3110ef19298bSStefan Weinhuber dst += part_len; 3111ef19298bSStefan Weinhuber } 3112ef19298bSStefan Weinhuber } 3113ef19298bSStefan Weinhuber } else { 3114ef19298bSStefan Weinhuber rq_for_each_segment(bv, req, iter) { 3115ef19298bSStefan Weinhuber dst = page_address(bv->bv_page) + bv->bv_offset; 3116ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, 0x00, 3117ef19298bSStefan Weinhuber dst, bv->bv_len); 3118cd10502bSJulia Lawall if (IS_ERR(last_tidaw)) { 3119cd10502bSJulia Lawall ret = -EINVAL; 3120cd10502bSJulia Lawall goto out_error; 3121cd10502bSJulia Lawall } 3122ef19298bSStefan Weinhuber } 3123ef19298bSStefan Weinhuber } 3124ef19298bSStefan Weinhuber last_tidaw->flags |= TIDAW_FLAGS_LAST; 3125ef19298bSStefan Weinhuber last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; 3126f3eb5384SStefan Weinhuber itcw_finalize(itcw); 3127f3eb5384SStefan Weinhuber 3128f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 3129f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 3130f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3131ef19298bSStefan Weinhuber cqr->cpmode = 1; 3132f3eb5384SStefan Weinhuber cqr->startdev = startdev; 3133f3eb5384SStefan Weinhuber cqr->memdev = startdev; 3134f3eb5384SStefan Weinhuber cqr->block = block; 31357c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 3136a4d26c6aSStefan Weinhuber cqr->lpm = startdev->path_data.ppm; 31371f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 31381aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 3139f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 3140f3eb5384SStefan Weinhuber return cqr; 3141cd10502bSJulia Lawall out_error: 3142cd10502bSJulia Lawall dasd_sfree_request(cqr, startdev); 3143cd10502bSJulia Lawall return ERR_PTR(ret); 3144f3eb5384SStefan Weinhuber } 3145f3eb5384SStefan Weinhuber 3146f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 3147f3eb5384SStefan Weinhuber struct dasd_block *block, 3148f3eb5384SStefan Weinhuber struct request *req) 3149f3eb5384SStefan Weinhuber { 3150ef19298bSStefan Weinhuber int cmdrtd, cmdwtd; 3151f3eb5384SStefan Weinhuber int use_prefix; 3152ef19298bSStefan Weinhuber int fcx_multitrack; 315345b44d76SStefan Weinhuber struct dasd_eckd_private *private; 3154f3eb5384SStefan Weinhuber struct dasd_device *basedev; 3155f3eb5384SStefan Weinhuber sector_t first_rec, last_rec; 3156f3eb5384SStefan Weinhuber sector_t first_trk, last_trk; 3157f3eb5384SStefan Weinhuber unsigned int first_offs, last_offs; 3158f3eb5384SStefan Weinhuber unsigned int blk_per_trk, blksize; 3159f3eb5384SStefan Weinhuber int cdlspecial; 3160ef19298bSStefan Weinhuber unsigned int data_size; 3161f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 3162f3eb5384SStefan Weinhuber 3163f3eb5384SStefan Weinhuber basedev = block->base; 3164f3eb5384SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 3165f3eb5384SStefan Weinhuber 3166f3eb5384SStefan Weinhuber /* Calculate number of blocks/records per track. */ 3167f3eb5384SStefan Weinhuber blksize = block->bp_block; 3168f3eb5384SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 31696fca97a9SStefan Haberland if (blk_per_trk == 0) 31706fca97a9SStefan Haberland return ERR_PTR(-EINVAL); 3171f3eb5384SStefan Weinhuber /* Calculate record id of first and last block. */ 317283096ebfSTejun Heo first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; 3173f3eb5384SStefan Weinhuber first_offs = sector_div(first_trk, blk_per_trk); 3174f3eb5384SStefan Weinhuber last_rec = last_trk = 317583096ebfSTejun Heo (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 3176f3eb5384SStefan Weinhuber last_offs = sector_div(last_trk, blk_per_trk); 3177f3eb5384SStefan Weinhuber cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); 3178f3eb5384SStefan Weinhuber 3179ef19298bSStefan Weinhuber fcx_multitrack = private->features.feature[40] & 0x20; 3180ef19298bSStefan Weinhuber data_size = blk_rq_bytes(req); 3181ef19298bSStefan Weinhuber /* tpm write request add CBC data on each track boundary */ 3182ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 3183ef19298bSStefan Weinhuber data_size += (last_trk - first_trk) * 4; 3184f3eb5384SStefan Weinhuber 3185f3eb5384SStefan Weinhuber /* is read track data and write track data in command mode supported? */ 3186f3eb5384SStefan Weinhuber cmdrtd = private->features.feature[9] & 0x20; 3187f3eb5384SStefan Weinhuber cmdwtd = private->features.feature[12] & 0x40; 3188f3eb5384SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 3189f3eb5384SStefan Weinhuber 3190f3eb5384SStefan Weinhuber cqr = NULL; 3191f3eb5384SStefan Weinhuber if (cdlspecial || dasd_page_cache) { 3192f3eb5384SStefan Weinhuber /* do nothing, just fall through to the cmd mode single case */ 3193ef19298bSStefan Weinhuber } else if ((data_size <= private->fcx_max_data) 3194ef19298bSStefan Weinhuber && (fcx_multitrack || (first_trk == last_trk))) { 3195f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, 3196f3eb5384SStefan Weinhuber first_rec, last_rec, 3197f3eb5384SStefan Weinhuber first_trk, last_trk, 3198f3eb5384SStefan Weinhuber first_offs, last_offs, 3199f3eb5384SStefan Weinhuber blk_per_trk, blksize); 3200ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3201ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 3202f3eb5384SStefan Weinhuber cqr = NULL; 3203f3eb5384SStefan Weinhuber } else if (use_prefix && 3204f3eb5384SStefan Weinhuber (((rq_data_dir(req) == READ) && cmdrtd) || 3205f3eb5384SStefan Weinhuber ((rq_data_dir(req) == WRITE) && cmdwtd))) { 3206f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, 3207f3eb5384SStefan Weinhuber first_rec, last_rec, 3208f3eb5384SStefan Weinhuber first_trk, last_trk, 3209f3eb5384SStefan Weinhuber first_offs, last_offs, 3210f3eb5384SStefan Weinhuber blk_per_trk, blksize); 3211ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3212ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 3213f3eb5384SStefan Weinhuber cqr = NULL; 3214f3eb5384SStefan Weinhuber } 3215f3eb5384SStefan Weinhuber if (!cqr) 3216f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, 3217f3eb5384SStefan Weinhuber first_rec, last_rec, 3218f3eb5384SStefan Weinhuber first_trk, last_trk, 3219f3eb5384SStefan Weinhuber first_offs, last_offs, 3220f3eb5384SStefan Weinhuber blk_per_trk, blksize); 3221f3eb5384SStefan Weinhuber return cqr; 3222f3eb5384SStefan Weinhuber } 3223f3eb5384SStefan Weinhuber 3224e4dbb0f2SStefan Haberland static struct dasd_ccw_req *dasd_raw_build_cp(struct dasd_device *startdev, 3225e4dbb0f2SStefan Haberland struct dasd_block *block, 3226e4dbb0f2SStefan Haberland struct request *req) 3227e4dbb0f2SStefan Haberland { 3228e4dbb0f2SStefan Haberland unsigned long *idaws; 3229e4dbb0f2SStefan Haberland struct dasd_device *basedev; 3230e4dbb0f2SStefan Haberland struct dasd_ccw_req *cqr; 3231e4dbb0f2SStefan Haberland struct ccw1 *ccw; 3232e4dbb0f2SStefan Haberland struct req_iterator iter; 3233e4dbb0f2SStefan Haberland struct bio_vec *bv; 3234e4dbb0f2SStefan Haberland char *dst; 3235e4dbb0f2SStefan Haberland unsigned char cmd; 3236e4dbb0f2SStefan Haberland unsigned int trkcount; 3237e4dbb0f2SStefan Haberland unsigned int seg_len, len_to_track_end; 3238e4dbb0f2SStefan Haberland unsigned int first_offs; 3239e4dbb0f2SStefan Haberland unsigned int cidaw, cplength, datasize; 3240e4dbb0f2SStefan Haberland sector_t first_trk, last_trk; 3241e4dbb0f2SStefan Haberland unsigned int pfx_datasize; 3242e4dbb0f2SStefan Haberland 3243e4dbb0f2SStefan Haberland /* 3244e4dbb0f2SStefan Haberland * raw track access needs to be mutiple of 64k and on 64k boundary 3245e4dbb0f2SStefan Haberland */ 3246e4dbb0f2SStefan Haberland if ((blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK) != 0) { 3247e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EINVAL); 3248e4dbb0f2SStefan Haberland goto out; 3249e4dbb0f2SStefan Haberland } 3250e4dbb0f2SStefan Haberland if (((blk_rq_pos(req) + blk_rq_sectors(req)) % 3251e4dbb0f2SStefan Haberland DASD_RAW_SECTORS_PER_TRACK) != 0) { 3252e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EINVAL); 3253e4dbb0f2SStefan Haberland goto out; 3254e4dbb0f2SStefan Haberland } 3255e4dbb0f2SStefan Haberland 3256e4dbb0f2SStefan Haberland first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; 3257e4dbb0f2SStefan Haberland last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / 3258e4dbb0f2SStefan Haberland DASD_RAW_SECTORS_PER_TRACK; 3259e4dbb0f2SStefan Haberland trkcount = last_trk - first_trk + 1; 3260e4dbb0f2SStefan Haberland first_offs = 0; 3261e4dbb0f2SStefan Haberland basedev = block->base; 3262e4dbb0f2SStefan Haberland 3263e4dbb0f2SStefan Haberland if (rq_data_dir(req) == READ) 3264e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_READ_TRACK; 3265e4dbb0f2SStefan Haberland else if (rq_data_dir(req) == WRITE) 3266e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; 3267e4dbb0f2SStefan Haberland else { 3268e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EINVAL); 3269e4dbb0f2SStefan Haberland goto out; 3270e4dbb0f2SStefan Haberland } 3271e4dbb0f2SStefan Haberland 3272e4dbb0f2SStefan Haberland /* 3273e4dbb0f2SStefan Haberland * Raw track based I/O needs IDAWs for each page, 3274e4dbb0f2SStefan Haberland * and not just for 64 bit addresses. 3275e4dbb0f2SStefan Haberland */ 3276e4dbb0f2SStefan Haberland cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; 3277e4dbb0f2SStefan Haberland 3278e4dbb0f2SStefan Haberland /* 1x prefix + one read/write ccw per track */ 3279e4dbb0f2SStefan Haberland cplength = 1 + trkcount; 3280e4dbb0f2SStefan Haberland 3281e4dbb0f2SStefan Haberland /* 3282e4dbb0f2SStefan Haberland * struct PFX_eckd_data has up to 2 byte as extended parameter 3283e4dbb0f2SStefan Haberland * this is needed for write full track and has to be mentioned 328425985edcSLucas De Marchi * separately 3285e4dbb0f2SStefan Haberland * add 8 instead of 2 to keep 8 byte boundary 3286e4dbb0f2SStefan Haberland */ 3287e4dbb0f2SStefan Haberland pfx_datasize = sizeof(struct PFX_eckd_data) + 8; 3288e4dbb0f2SStefan Haberland 3289e4dbb0f2SStefan Haberland datasize = pfx_datasize + cidaw * sizeof(unsigned long long); 3290e4dbb0f2SStefan Haberland 3291e4dbb0f2SStefan Haberland /* Allocate the ccw request. */ 3292e4dbb0f2SStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 3293e4dbb0f2SStefan Haberland datasize, startdev); 3294e4dbb0f2SStefan Haberland if (IS_ERR(cqr)) 3295e4dbb0f2SStefan Haberland goto out; 3296e4dbb0f2SStefan Haberland ccw = cqr->cpaddr; 3297e4dbb0f2SStefan Haberland 3298e4dbb0f2SStefan Haberland if (prefix_LRE(ccw++, cqr->data, first_trk, last_trk, cmd, 3299e4dbb0f2SStefan Haberland basedev, startdev, 1 /* format */, first_offs + 1, 3300e4dbb0f2SStefan Haberland trkcount, 0, 0) == -EAGAIN) { 3301e4dbb0f2SStefan Haberland /* Clock not in sync and XRC is enabled. 3302e4dbb0f2SStefan Haberland * Try again later. 3303e4dbb0f2SStefan Haberland */ 3304e4dbb0f2SStefan Haberland dasd_sfree_request(cqr, startdev); 3305e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EAGAIN); 3306e4dbb0f2SStefan Haberland goto out; 3307e4dbb0f2SStefan Haberland } 3308e4dbb0f2SStefan Haberland 3309e4dbb0f2SStefan Haberland idaws = (unsigned long *)(cqr->data + pfx_datasize); 3310e4dbb0f2SStefan Haberland 3311e4dbb0f2SStefan Haberland len_to_track_end = 0; 3312e4dbb0f2SStefan Haberland 3313e4dbb0f2SStefan Haberland rq_for_each_segment(bv, req, iter) { 3314e4dbb0f2SStefan Haberland dst = page_address(bv->bv_page) + bv->bv_offset; 3315e4dbb0f2SStefan Haberland seg_len = bv->bv_len; 3316e4dbb0f2SStefan Haberland if (!len_to_track_end) { 3317e4dbb0f2SStefan Haberland ccw[-1].flags |= CCW_FLAG_CC; 3318e4dbb0f2SStefan Haberland ccw->cmd_code = cmd; 3319e4dbb0f2SStefan Haberland /* maximum 3390 track size */ 3320e4dbb0f2SStefan Haberland ccw->count = 57326; 3321e4dbb0f2SStefan Haberland /* 64k map to one track */ 3322e4dbb0f2SStefan Haberland len_to_track_end = 65536; 3323e4dbb0f2SStefan Haberland ccw->cda = (__u32)(addr_t)idaws; 3324e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_IDA; 3325e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 3326e4dbb0f2SStefan Haberland ccw++; 3327e4dbb0f2SStefan Haberland } 3328e4dbb0f2SStefan Haberland len_to_track_end -= seg_len; 3329e4dbb0f2SStefan Haberland idaws = idal_create_words(idaws, dst, seg_len); 3330e4dbb0f2SStefan Haberland } 3331e4dbb0f2SStefan Haberland 3332e4dbb0f2SStefan Haberland if (blk_noretry_request(req) || 3333e4dbb0f2SStefan Haberland block->base->features & DASD_FEATURE_FAILFAST) 3334e4dbb0f2SStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3335e4dbb0f2SStefan Haberland cqr->startdev = startdev; 3336e4dbb0f2SStefan Haberland cqr->memdev = startdev; 3337e4dbb0f2SStefan Haberland cqr->block = block; 3338e4dbb0f2SStefan Haberland cqr->expires = startdev->default_expires * HZ; 3339e4dbb0f2SStefan Haberland cqr->lpm = startdev->path_data.ppm; 33401f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 33411aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 3342e4dbb0f2SStefan Haberland cqr->status = DASD_CQR_FILLED; 3343e4dbb0f2SStefan Haberland 3344e4dbb0f2SStefan Haberland if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN) 3345e4dbb0f2SStefan Haberland cqr = NULL; 3346e4dbb0f2SStefan Haberland out: 3347e4dbb0f2SStefan Haberland return cqr; 3348e4dbb0f2SStefan Haberland } 3349e4dbb0f2SStefan Haberland 3350e4dbb0f2SStefan Haberland 33511da177e4SLinus Torvalds static int 33521da177e4SLinus Torvalds dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 33531da177e4SLinus Torvalds { 33541da177e4SLinus Torvalds struct dasd_eckd_private *private; 33551da177e4SLinus Torvalds struct ccw1 *ccw; 33565705f702SNeilBrown struct req_iterator iter; 33571da177e4SLinus Torvalds struct bio_vec *bv; 33581da177e4SLinus Torvalds char *dst, *cda; 33591da177e4SLinus Torvalds unsigned int blksize, blk_per_trk, off; 33601da177e4SLinus Torvalds sector_t recid; 33615705f702SNeilBrown int status; 33621da177e4SLinus Torvalds 33631da177e4SLinus Torvalds if (!dasd_page_cache) 33641da177e4SLinus Torvalds goto out; 33658e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) cqr->block->base->private; 33668e09f215SStefan Weinhuber blksize = cqr->block->bp_block; 33671da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 336883096ebfSTejun Heo recid = blk_rq_pos(req) >> cqr->block->s2b_shift; 33691da177e4SLinus Torvalds ccw = cqr->cpaddr; 33701da177e4SLinus Torvalds /* Skip over define extent & locate record. */ 33711da177e4SLinus Torvalds ccw++; 33721da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 33731da177e4SLinus Torvalds ccw++; 33745705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 33751da177e4SLinus Torvalds dst = page_address(bv->bv_page) + bv->bv_offset; 33761da177e4SLinus Torvalds for (off = 0; off < bv->bv_len; off += blksize) { 33771da177e4SLinus Torvalds /* Skip locate record. */ 33781da177e4SLinus Torvalds if (private->uses_cdl && recid <= 2*blk_per_trk) 33791da177e4SLinus Torvalds ccw++; 33801da177e4SLinus Torvalds if (dst) { 33811da177e4SLinus Torvalds if (ccw->flags & CCW_FLAG_IDA) 33821da177e4SLinus Torvalds cda = *((char **)((addr_t) ccw->cda)); 33831da177e4SLinus Torvalds else 33841da177e4SLinus Torvalds cda = (char *)((addr_t) ccw->cda); 33851da177e4SLinus Torvalds if (dst != cda) { 33861da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 33871da177e4SLinus Torvalds memcpy(dst, cda, bv->bv_len); 33881da177e4SLinus Torvalds kmem_cache_free(dasd_page_cache, 33891da177e4SLinus Torvalds (void *)((addr_t)cda & PAGE_MASK)); 33901da177e4SLinus Torvalds } 33911da177e4SLinus Torvalds dst = NULL; 33921da177e4SLinus Torvalds } 33931da177e4SLinus Torvalds ccw++; 33941da177e4SLinus Torvalds recid++; 33951da177e4SLinus Torvalds } 33961da177e4SLinus Torvalds } 33971da177e4SLinus Torvalds out: 33981da177e4SLinus Torvalds status = cqr->status == DASD_CQR_DONE; 33998e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 34001da177e4SLinus Torvalds return status; 34011da177e4SLinus Torvalds } 34021da177e4SLinus Torvalds 34038e09f215SStefan Weinhuber /* 3404f3eb5384SStefan Weinhuber * Modify ccw/tcw in cqr so it can be started on a base device. 34058e09f215SStefan Weinhuber * 34068e09f215SStefan Weinhuber * Note that this is not enough to restart the cqr! 34078e09f215SStefan Weinhuber * Either reset cqr->startdev as well (summary unit check handling) 34088e09f215SStefan Weinhuber * or restart via separate cqr (as in ERP handling). 34098e09f215SStefan Weinhuber */ 34108e09f215SStefan Weinhuber void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 34118e09f215SStefan Weinhuber { 34128e09f215SStefan Weinhuber struct ccw1 *ccw; 34138e09f215SStefan Weinhuber struct PFX_eckd_data *pfxdata; 3414f3eb5384SStefan Weinhuber struct tcw *tcw; 3415f3eb5384SStefan Weinhuber struct tccb *tccb; 3416f3eb5384SStefan Weinhuber struct dcw *dcw; 34178e09f215SStefan Weinhuber 3418f3eb5384SStefan Weinhuber if (cqr->cpmode == 1) { 3419f3eb5384SStefan Weinhuber tcw = cqr->cpaddr; 3420f3eb5384SStefan Weinhuber tccb = tcw_get_tccb(tcw); 3421f3eb5384SStefan Weinhuber dcw = (struct dcw *)&tccb->tca[0]; 3422f3eb5384SStefan Weinhuber pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; 3423f3eb5384SStefan Weinhuber pfxdata->validity.verify_base = 0; 3424f3eb5384SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 3425f3eb5384SStefan Weinhuber } else { 34268e09f215SStefan Weinhuber ccw = cqr->cpaddr; 34278e09f215SStefan Weinhuber pfxdata = cqr->data; 34288e09f215SStefan Weinhuber if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 34298e09f215SStefan Weinhuber pfxdata->validity.verify_base = 0; 34308e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 34318e09f215SStefan Weinhuber } 34328e09f215SStefan Weinhuber } 3433f3eb5384SStefan Weinhuber } 34348e09f215SStefan Weinhuber 34358e09f215SStefan Weinhuber #define DASD_ECKD_CHANQ_MAX_SIZE 4 34368e09f215SStefan Weinhuber 34378e09f215SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 34388e09f215SStefan Weinhuber struct dasd_block *block, 34398e09f215SStefan Weinhuber struct request *req) 34408e09f215SStefan Weinhuber { 34418e09f215SStefan Weinhuber struct dasd_eckd_private *private; 34428e09f215SStefan Weinhuber struct dasd_device *startdev; 34438e09f215SStefan Weinhuber unsigned long flags; 34448e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 34458e09f215SStefan Weinhuber 34468e09f215SStefan Weinhuber startdev = dasd_alias_get_start_dev(base); 34478e09f215SStefan Weinhuber if (!startdev) 34488e09f215SStefan Weinhuber startdev = base; 34498e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) startdev->private; 34508e09f215SStefan Weinhuber if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 34518e09f215SStefan Weinhuber return ERR_PTR(-EBUSY); 34528e09f215SStefan Weinhuber 34538e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 34548e09f215SStefan Weinhuber private->count++; 3455e4dbb0f2SStefan Haberland if ((base->features & DASD_FEATURE_USERAW)) 3456e4dbb0f2SStefan Haberland cqr = dasd_raw_build_cp(startdev, block, req); 3457e4dbb0f2SStefan Haberland else 34588e09f215SStefan Weinhuber cqr = dasd_eckd_build_cp(startdev, block, req); 34598e09f215SStefan Weinhuber if (IS_ERR(cqr)) 34608e09f215SStefan Weinhuber private->count--; 34618e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 34628e09f215SStefan Weinhuber return cqr; 34638e09f215SStefan Weinhuber } 34648e09f215SStefan Weinhuber 34658e09f215SStefan Weinhuber static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 34668e09f215SStefan Weinhuber struct request *req) 34678e09f215SStefan Weinhuber { 34688e09f215SStefan Weinhuber struct dasd_eckd_private *private; 34698e09f215SStefan Weinhuber unsigned long flags; 34708e09f215SStefan Weinhuber 34718e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 34728e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) cqr->memdev->private; 34738e09f215SStefan Weinhuber private->count--; 34748e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 34758e09f215SStefan Weinhuber return dasd_eckd_free_cp(cqr, req); 34768e09f215SStefan Weinhuber } 34778e09f215SStefan Weinhuber 34781da177e4SLinus Torvalds static int 34791da177e4SLinus Torvalds dasd_eckd_fill_info(struct dasd_device * device, 34801da177e4SLinus Torvalds struct dasd_information2_t * info) 34811da177e4SLinus Torvalds { 34821da177e4SLinus Torvalds struct dasd_eckd_private *private; 34831da177e4SLinus Torvalds 34841da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 34851da177e4SLinus Torvalds info->label_block = 2; 34861da177e4SLinus Torvalds info->FBA_layout = private->uses_cdl ? 0 : 1; 34871da177e4SLinus Torvalds info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 34881da177e4SLinus Torvalds info->characteristics_size = sizeof(struct dasd_eckd_characteristics); 34891da177e4SLinus Torvalds memcpy(info->characteristics, &private->rdc_data, 34901da177e4SLinus Torvalds sizeof(struct dasd_eckd_characteristics)); 34914abb08c2SStefan Weinhuber info->confdata_size = min((unsigned long)private->conf_len, 34924abb08c2SStefan Weinhuber sizeof(info->configuration_data)); 34934abb08c2SStefan Weinhuber memcpy(info->configuration_data, private->conf_data, 34944abb08c2SStefan Weinhuber info->confdata_size); 34951da177e4SLinus Torvalds return 0; 34961da177e4SLinus Torvalds } 34971da177e4SLinus Torvalds 34981da177e4SLinus Torvalds /* 34991da177e4SLinus Torvalds * SECTION: ioctl functions for eckd devices. 35001da177e4SLinus Torvalds */ 35011da177e4SLinus Torvalds 35021da177e4SLinus Torvalds /* 35031da177e4SLinus Torvalds * Release device ioctl. 35041da177e4SLinus Torvalds * Buils a channel programm to releases a prior reserved 35051da177e4SLinus Torvalds * (see dasd_eckd_reserve) device. 35061da177e4SLinus Torvalds */ 35071da177e4SLinus Torvalds static int 35081107ccfbSChristoph Hellwig dasd_eckd_release(struct dasd_device *device) 35091da177e4SLinus Torvalds { 35101da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 35111da177e4SLinus Torvalds int rc; 3512f3eb5384SStefan Weinhuber struct ccw1 *ccw; 3513f932bceaSStefan Weinhuber int useglobal; 35141da177e4SLinus Torvalds 35151da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 35161da177e4SLinus Torvalds return -EACCES; 35171da177e4SLinus Torvalds 3518f932bceaSStefan Weinhuber useglobal = 0; 351968b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 35201da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3521f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3522f932bceaSStefan Weinhuber useglobal = 1; 3523f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3524f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3525f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3526f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3527f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3528f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3529f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 35301da177e4SLinus Torvalds } 3531f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 3532f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RELEASE; 3533f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3534f3eb5384SStefan Weinhuber ccw->count = 32; 3535f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 35368e09f215SStefan Weinhuber cqr->startdev = device; 35378e09f215SStefan Weinhuber cqr->memdev = device; 35381da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 35391c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3540336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 35411da177e4SLinus Torvalds cqr->expires = 2 * HZ; 35421aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 35431da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 35441da177e4SLinus Torvalds 35451da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 35465a27e60dSStefan Weinhuber if (!rc) 35475a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 35481da177e4SLinus Torvalds 3549f932bceaSStefan Weinhuber if (useglobal) 3550f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3551f932bceaSStefan Weinhuber else 35528e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 35531da177e4SLinus Torvalds return rc; 35541da177e4SLinus Torvalds } 35551da177e4SLinus Torvalds 35561da177e4SLinus Torvalds /* 35571da177e4SLinus Torvalds * Reserve device ioctl. 35581da177e4SLinus Torvalds * Options are set to 'synchronous wait for interrupt' and 35591da177e4SLinus Torvalds * 'timeout the request'. This leads to a terminate IO if 35601da177e4SLinus Torvalds * the interrupt is outstanding for a certain time. 35611da177e4SLinus Torvalds */ 35621da177e4SLinus Torvalds static int 35631107ccfbSChristoph Hellwig dasd_eckd_reserve(struct dasd_device *device) 35641da177e4SLinus Torvalds { 35651da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 35661da177e4SLinus Torvalds int rc; 3567f3eb5384SStefan Weinhuber struct ccw1 *ccw; 3568f932bceaSStefan Weinhuber int useglobal; 35691da177e4SLinus Torvalds 35701da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 35711da177e4SLinus Torvalds return -EACCES; 35721da177e4SLinus Torvalds 3573f932bceaSStefan Weinhuber useglobal = 0; 357468b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 35751da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3576f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3577f932bceaSStefan Weinhuber useglobal = 1; 3578f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3579f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3580f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3581f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3582f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3583f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3584f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 35851da177e4SLinus Torvalds } 3586f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 3587f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RESERVE; 3588f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3589f3eb5384SStefan Weinhuber ccw->count = 32; 3590f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 35918e09f215SStefan Weinhuber cqr->startdev = device; 35928e09f215SStefan Weinhuber cqr->memdev = device; 35931da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 35941c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3595336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 35961da177e4SLinus Torvalds cqr->expires = 2 * HZ; 35971aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 35981da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 35991da177e4SLinus Torvalds 36001da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 36015a27e60dSStefan Weinhuber if (!rc) 36025a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 36031da177e4SLinus Torvalds 3604f932bceaSStefan Weinhuber if (useglobal) 3605f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3606f932bceaSStefan Weinhuber else 36078e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 36081da177e4SLinus Torvalds return rc; 36091da177e4SLinus Torvalds } 36101da177e4SLinus Torvalds 36111da177e4SLinus Torvalds /* 36121da177e4SLinus Torvalds * Steal lock ioctl - unconditional reserve device. 36131da177e4SLinus Torvalds * Buils a channel programm to break a device's reservation. 36141da177e4SLinus Torvalds * (unconditional reserve) 36151da177e4SLinus Torvalds */ 36161da177e4SLinus Torvalds static int 36171107ccfbSChristoph Hellwig dasd_eckd_steal_lock(struct dasd_device *device) 36181da177e4SLinus Torvalds { 36191da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 36201da177e4SLinus Torvalds int rc; 3621f3eb5384SStefan Weinhuber struct ccw1 *ccw; 3622f932bceaSStefan Weinhuber int useglobal; 36231da177e4SLinus Torvalds 36241da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 36251da177e4SLinus Torvalds return -EACCES; 36261da177e4SLinus Torvalds 3627f932bceaSStefan Weinhuber useglobal = 0; 362868b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 36291da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3630f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3631f932bceaSStefan Weinhuber useglobal = 1; 3632f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3633f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3634f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3635f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3636f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3637f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3638f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 36391da177e4SLinus Torvalds } 3640f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 3641f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SLCK; 3642f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3643f3eb5384SStefan Weinhuber ccw->count = 32; 3644f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 36458e09f215SStefan Weinhuber cqr->startdev = device; 36468e09f215SStefan Weinhuber cqr->memdev = device; 36471da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 36481c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3649336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 36501da177e4SLinus Torvalds cqr->expires = 2 * HZ; 36511aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 36521da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 36531da177e4SLinus Torvalds 36541da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 36555a27e60dSStefan Weinhuber if (!rc) 36565a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 36571da177e4SLinus Torvalds 3658f932bceaSStefan Weinhuber if (useglobal) 3659f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3660f932bceaSStefan Weinhuber else 36618e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 36621da177e4SLinus Torvalds return rc; 36631da177e4SLinus Torvalds } 36641da177e4SLinus Torvalds 36651da177e4SLinus Torvalds /* 3666196339f1SStefan Weinhuber * SNID - Sense Path Group ID 3667196339f1SStefan Weinhuber * This ioctl may be used in situations where I/O is stalled due to 3668196339f1SStefan Weinhuber * a reserve, so if the normal dasd_smalloc_request fails, we use the 3669196339f1SStefan Weinhuber * preallocated dasd_reserve_req. 3670196339f1SStefan Weinhuber */ 3671196339f1SStefan Weinhuber static int dasd_eckd_snid(struct dasd_device *device, 3672196339f1SStefan Weinhuber void __user *argp) 3673196339f1SStefan Weinhuber { 3674196339f1SStefan Weinhuber struct dasd_ccw_req *cqr; 3675196339f1SStefan Weinhuber int rc; 3676196339f1SStefan Weinhuber struct ccw1 *ccw; 3677196339f1SStefan Weinhuber int useglobal; 3678196339f1SStefan Weinhuber struct dasd_snid_ioctl_data usrparm; 3679196339f1SStefan Weinhuber 3680196339f1SStefan Weinhuber if (!capable(CAP_SYS_ADMIN)) 3681196339f1SStefan Weinhuber return -EACCES; 3682196339f1SStefan Weinhuber 3683196339f1SStefan Weinhuber if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 3684196339f1SStefan Weinhuber return -EFAULT; 3685196339f1SStefan Weinhuber 3686196339f1SStefan Weinhuber useglobal = 0; 3687196339f1SStefan Weinhuber cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 3688196339f1SStefan Weinhuber sizeof(struct dasd_snid_data), device); 3689196339f1SStefan Weinhuber if (IS_ERR(cqr)) { 3690196339f1SStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3691196339f1SStefan Weinhuber useglobal = 1; 3692196339f1SStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3693196339f1SStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3694196339f1SStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3695196339f1SStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3696196339f1SStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3697196339f1SStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3698196339f1SStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 3699196339f1SStefan Weinhuber } 3700196339f1SStefan Weinhuber ccw = cqr->cpaddr; 3701196339f1SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SNID; 3702196339f1SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3703196339f1SStefan Weinhuber ccw->count = 12; 3704196339f1SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 3705196339f1SStefan Weinhuber cqr->startdev = device; 3706196339f1SStefan Weinhuber cqr->memdev = device; 3707196339f1SStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3708196339f1SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 37095a27e60dSStefan Weinhuber set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 3710196339f1SStefan Weinhuber cqr->retries = 5; 3711196339f1SStefan Weinhuber cqr->expires = 10 * HZ; 37121aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 3713196339f1SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 3714196339f1SStefan Weinhuber cqr->lpm = usrparm.path_mask; 3715196339f1SStefan Weinhuber 3716196339f1SStefan Weinhuber rc = dasd_sleep_on_immediatly(cqr); 3717196339f1SStefan Weinhuber /* verify that I/O processing didn't modify the path mask */ 3718196339f1SStefan Weinhuber if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) 3719196339f1SStefan Weinhuber rc = -EIO; 3720196339f1SStefan Weinhuber if (!rc) { 3721196339f1SStefan Weinhuber usrparm.data = *((struct dasd_snid_data *)cqr->data); 3722196339f1SStefan Weinhuber if (copy_to_user(argp, &usrparm, sizeof(usrparm))) 3723196339f1SStefan Weinhuber rc = -EFAULT; 3724196339f1SStefan Weinhuber } 3725196339f1SStefan Weinhuber 3726196339f1SStefan Weinhuber if (useglobal) 3727196339f1SStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3728196339f1SStefan Weinhuber else 3729196339f1SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 3730196339f1SStefan Weinhuber return rc; 3731196339f1SStefan Weinhuber } 3732196339f1SStefan Weinhuber 3733196339f1SStefan Weinhuber /* 37341da177e4SLinus Torvalds * Read performance statistics 37351da177e4SLinus Torvalds */ 37361da177e4SLinus Torvalds static int 37371107ccfbSChristoph Hellwig dasd_eckd_performance(struct dasd_device *device, void __user *argp) 37381da177e4SLinus Torvalds { 37391da177e4SLinus Torvalds struct dasd_psf_prssd_data *prssdp; 37401da177e4SLinus Torvalds struct dasd_rssd_perf_stats_t *stats; 37411da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 37421da177e4SLinus Torvalds struct ccw1 *ccw; 37431da177e4SLinus Torvalds int rc; 37441da177e4SLinus Torvalds 374568b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 37461da177e4SLinus Torvalds (sizeof(struct dasd_psf_prssd_data) + 37471da177e4SLinus Torvalds sizeof(struct dasd_rssd_perf_stats_t)), 37481da177e4SLinus Torvalds device); 37491da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3750fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 37511da177e4SLinus Torvalds "Could not allocate initialization request"); 37521da177e4SLinus Torvalds return PTR_ERR(cqr); 37531da177e4SLinus Torvalds } 37548e09f215SStefan Weinhuber cqr->startdev = device; 37558e09f215SStefan Weinhuber cqr->memdev = device; 37561da177e4SLinus Torvalds cqr->retries = 0; 3757eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 37581da177e4SLinus Torvalds cqr->expires = 10 * HZ; 37591da177e4SLinus Torvalds 37601da177e4SLinus Torvalds /* Prepare for Read Subsystem Data */ 37611da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 37621da177e4SLinus Torvalds memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 37631da177e4SLinus Torvalds prssdp->order = PSF_ORDER_PRSSD; 37645d67d164SJoe Perches prssdp->suborder = 0x01; /* Performance Statistics */ 37651da177e4SLinus Torvalds prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 37661da177e4SLinus Torvalds 37671da177e4SLinus Torvalds ccw = cqr->cpaddr; 37681da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_PSF; 37691da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_psf_prssd_data); 37701da177e4SLinus Torvalds ccw->flags |= CCW_FLAG_CC; 37711da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) prssdp; 37721da177e4SLinus Torvalds 37731da177e4SLinus Torvalds /* Read Subsystem Data - Performance Statistics */ 37741da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 37751da177e4SLinus Torvalds memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 37761da177e4SLinus Torvalds 37771da177e4SLinus Torvalds ccw++; 37781da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_RSSD; 37791da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 37801da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) stats; 37811da177e4SLinus Torvalds 37821aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 37831da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 37841da177e4SLinus Torvalds rc = dasd_sleep_on(cqr); 37851da177e4SLinus Torvalds if (rc == 0) { 37861da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 37871da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 37881107ccfbSChristoph Hellwig if (copy_to_user(argp, stats, 37891107ccfbSChristoph Hellwig sizeof(struct dasd_rssd_perf_stats_t))) 37901107ccfbSChristoph Hellwig rc = -EFAULT; 37911da177e4SLinus Torvalds } 37928e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 37931da177e4SLinus Torvalds return rc; 37941da177e4SLinus Torvalds } 37951da177e4SLinus Torvalds 37961da177e4SLinus Torvalds /* 37971da177e4SLinus Torvalds * Get attributes (cache operations) 37981da177e4SLinus Torvalds * Returnes the cache attributes used in Define Extend (DE). 37991da177e4SLinus Torvalds */ 38001da177e4SLinus Torvalds static int 38011107ccfbSChristoph Hellwig dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 38021da177e4SLinus Torvalds { 38031107ccfbSChristoph Hellwig struct dasd_eckd_private *private = 38041107ccfbSChristoph Hellwig (struct dasd_eckd_private *)device->private; 38051107ccfbSChristoph Hellwig struct attrib_data_t attrib = private->attrib; 38061da177e4SLinus Torvalds int rc; 38071da177e4SLinus Torvalds 38081da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 38091da177e4SLinus Torvalds return -EACCES; 38101107ccfbSChristoph Hellwig if (!argp) 38111da177e4SLinus Torvalds return -EINVAL; 38121da177e4SLinus Torvalds 38131107ccfbSChristoph Hellwig rc = 0; 38141107ccfbSChristoph Hellwig if (copy_to_user(argp, (long *) &attrib, 38151107ccfbSChristoph Hellwig sizeof(struct attrib_data_t))) 38161107ccfbSChristoph Hellwig rc = -EFAULT; 38171da177e4SLinus Torvalds 38181da177e4SLinus Torvalds return rc; 38191da177e4SLinus Torvalds } 38201da177e4SLinus Torvalds 38211da177e4SLinus Torvalds /* 38221da177e4SLinus Torvalds * Set attributes (cache operations) 38231da177e4SLinus Torvalds * Stores the attributes for cache operation to be used in Define Extend (DE). 38241da177e4SLinus Torvalds */ 38251da177e4SLinus Torvalds static int 38261107ccfbSChristoph Hellwig dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 38271da177e4SLinus Torvalds { 38281107ccfbSChristoph Hellwig struct dasd_eckd_private *private = 38291107ccfbSChristoph Hellwig (struct dasd_eckd_private *)device->private; 38301da177e4SLinus Torvalds struct attrib_data_t attrib; 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 if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 38381da177e4SLinus Torvalds return -EFAULT; 38391da177e4SLinus Torvalds private->attrib = attrib; 38401da177e4SLinus Torvalds 3841fc19f381SStefan Haberland dev_info(&device->cdev->dev, 3842fc19f381SStefan Haberland "The DASD cache mode was set to %x (%i cylinder prestage)\n", 38431da177e4SLinus Torvalds private->attrib.operation, private->attrib.nr_cyl); 38441da177e4SLinus Torvalds return 0; 38451da177e4SLinus Torvalds } 38461da177e4SLinus Torvalds 3847ab1d848fSNigel Hislop /* 3848ab1d848fSNigel Hislop * Issue syscall I/O to EMC Symmetrix array. 3849ab1d848fSNigel Hislop * CCWs are PSF and RSSD 3850ab1d848fSNigel Hislop */ 3851ab1d848fSNigel Hislop static int dasd_symm_io(struct dasd_device *device, void __user *argp) 3852ab1d848fSNigel Hislop { 3853ab1d848fSNigel Hislop struct dasd_symmio_parms usrparm; 3854ab1d848fSNigel Hislop char *psf_data, *rssd_result; 3855ab1d848fSNigel Hislop struct dasd_ccw_req *cqr; 3856ab1d848fSNigel Hislop struct ccw1 *ccw; 385752898025SNigel Hislop char psf0, psf1; 3858ab1d848fSNigel Hislop int rc; 3859ab1d848fSNigel Hislop 386052898025SNigel Hislop if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) 386152898025SNigel Hislop return -EACCES; 386252898025SNigel Hislop psf0 = psf1 = 0; 386352898025SNigel Hislop 3864ab1d848fSNigel Hislop /* Copy parms from caller */ 3865ab1d848fSNigel Hislop rc = -EFAULT; 3866ab1d848fSNigel Hislop if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 3867ab1d848fSNigel Hislop goto out; 3868f8b06859SHeiko Carstens if (is_compat_task() || sizeof(long) == 4) { 3869ab1d848fSNigel Hislop /* Make sure pointers are sane even on 31 bit. */ 3870ab1d848fSNigel Hislop rc = -EINVAL; 3871f8b06859SHeiko Carstens if ((usrparm.psf_data >> 32) != 0) 3872ab1d848fSNigel Hislop goto out; 3873f8b06859SHeiko Carstens if ((usrparm.rssd_result >> 32) != 0) 3874f8b06859SHeiko Carstens goto out; 3875f8b06859SHeiko Carstens usrparm.psf_data &= 0x7fffffffULL; 3876f8b06859SHeiko Carstens usrparm.rssd_result &= 0x7fffffffULL; 3877ab1d848fSNigel Hislop } 3878ab1d848fSNigel Hislop /* alloc I/O data area */ 3879ab1d848fSNigel Hislop psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 3880ab1d848fSNigel Hislop rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 3881ab1d848fSNigel Hislop if (!psf_data || !rssd_result) { 3882ab1d848fSNigel Hislop rc = -ENOMEM; 3883ab1d848fSNigel Hislop goto out_free; 3884ab1d848fSNigel Hislop } 3885ab1d848fSNigel Hislop 3886ab1d848fSNigel Hislop /* get syscall header from user space */ 3887ab1d848fSNigel Hislop rc = -EFAULT; 3888ab1d848fSNigel Hislop if (copy_from_user(psf_data, 3889ab1d848fSNigel Hislop (void __user *)(unsigned long) usrparm.psf_data, 3890ab1d848fSNigel Hislop usrparm.psf_data_len)) 3891ab1d848fSNigel Hislop goto out_free; 389252898025SNigel Hislop psf0 = psf_data[0]; 389352898025SNigel Hislop psf1 = psf_data[1]; 3894ab1d848fSNigel Hislop 3895ab1d848fSNigel Hislop /* setup CCWs for PSF + RSSD */ 389668b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device); 3897ab1d848fSNigel Hislop if (IS_ERR(cqr)) { 3898fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3899ab1d848fSNigel Hislop "Could not allocate initialization request"); 3900ab1d848fSNigel Hislop rc = PTR_ERR(cqr); 3901ab1d848fSNigel Hislop goto out_free; 3902ab1d848fSNigel Hislop } 3903ab1d848fSNigel Hislop 3904ab1d848fSNigel Hislop cqr->startdev = device; 3905ab1d848fSNigel Hislop cqr->memdev = device; 3906ab1d848fSNigel Hislop cqr->retries = 3; 3907ab1d848fSNigel Hislop cqr->expires = 10 * HZ; 39081aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 3909ab1d848fSNigel Hislop cqr->status = DASD_CQR_FILLED; 3910ab1d848fSNigel Hislop 3911ab1d848fSNigel Hislop /* Build the ccws */ 3912ab1d848fSNigel Hislop ccw = cqr->cpaddr; 3913ab1d848fSNigel Hislop 3914ab1d848fSNigel Hislop /* PSF ccw */ 3915ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_PSF; 3916ab1d848fSNigel Hislop ccw->count = usrparm.psf_data_len; 3917ab1d848fSNigel Hislop ccw->flags |= CCW_FLAG_CC; 3918ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) psf_data; 3919ab1d848fSNigel Hislop 3920ab1d848fSNigel Hislop ccw++; 3921ab1d848fSNigel Hislop 3922ab1d848fSNigel Hislop /* RSSD ccw */ 3923ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_RSSD; 3924ab1d848fSNigel Hislop ccw->count = usrparm.rssd_result_len; 3925ab1d848fSNigel Hislop ccw->flags = CCW_FLAG_SLI ; 3926ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) rssd_result; 3927ab1d848fSNigel Hislop 3928ab1d848fSNigel Hislop rc = dasd_sleep_on(cqr); 3929ab1d848fSNigel Hislop if (rc) 3930ab1d848fSNigel Hislop goto out_sfree; 3931ab1d848fSNigel Hislop 3932ab1d848fSNigel Hislop rc = -EFAULT; 3933ab1d848fSNigel Hislop if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 3934ab1d848fSNigel Hislop rssd_result, usrparm.rssd_result_len)) 3935ab1d848fSNigel Hislop goto out_sfree; 3936ab1d848fSNigel Hislop rc = 0; 3937ab1d848fSNigel Hislop 3938ab1d848fSNigel Hislop out_sfree: 3939ab1d848fSNigel Hislop dasd_sfree_request(cqr, cqr->memdev); 3940ab1d848fSNigel Hislop out_free: 3941ab1d848fSNigel Hislop kfree(rssd_result); 3942ab1d848fSNigel Hislop kfree(psf_data); 3943ab1d848fSNigel Hislop out: 394452898025SNigel Hislop DBF_DEV_EVENT(DBF_WARNING, device, 394552898025SNigel Hislop "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", 394652898025SNigel Hislop (int) psf0, (int) psf1, rc); 3947ab1d848fSNigel Hislop return rc; 3948ab1d848fSNigel Hislop } 3949ab1d848fSNigel Hislop 39501107ccfbSChristoph Hellwig static int 39518e09f215SStefan Weinhuber dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 39521107ccfbSChristoph Hellwig { 39538e09f215SStefan Weinhuber struct dasd_device *device = block->base; 39548e09f215SStefan Weinhuber 39551107ccfbSChristoph Hellwig switch (cmd) { 39561107ccfbSChristoph Hellwig case BIODASDGATTR: 39571107ccfbSChristoph Hellwig return dasd_eckd_get_attrib(device, argp); 39581107ccfbSChristoph Hellwig case BIODASDSATTR: 39591107ccfbSChristoph Hellwig return dasd_eckd_set_attrib(device, argp); 39601107ccfbSChristoph Hellwig case BIODASDPSRD: 39611107ccfbSChristoph Hellwig return dasd_eckd_performance(device, argp); 39621107ccfbSChristoph Hellwig case BIODASDRLSE: 39631107ccfbSChristoph Hellwig return dasd_eckd_release(device); 39641107ccfbSChristoph Hellwig case BIODASDRSRV: 39651107ccfbSChristoph Hellwig return dasd_eckd_reserve(device); 39661107ccfbSChristoph Hellwig case BIODASDSLCK: 39671107ccfbSChristoph Hellwig return dasd_eckd_steal_lock(device); 3968196339f1SStefan Weinhuber case BIODASDSNID: 3969196339f1SStefan Weinhuber return dasd_eckd_snid(device, argp); 3970ab1d848fSNigel Hislop case BIODASDSYMMIO: 3971ab1d848fSNigel Hislop return dasd_symm_io(device, argp); 39721107ccfbSChristoph Hellwig default: 39736b79d14eSHeiko Carstens return -ENOTTY; 39741107ccfbSChristoph Hellwig } 39751107ccfbSChristoph Hellwig } 39761107ccfbSChristoph Hellwig 39771da177e4SLinus Torvalds /* 3978445b5b49SHorst Hummel * Dump the range of CCWs into 'page' buffer 3979445b5b49SHorst Hummel * and return number of printed chars. 3980445b5b49SHorst Hummel */ 39814d284cacSHeiko Carstens static int 3982445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 3983445b5b49SHorst Hummel { 3984445b5b49SHorst Hummel int len, count; 3985445b5b49SHorst Hummel char *datap; 3986445b5b49SHorst Hummel 3987445b5b49SHorst Hummel len = 0; 3988445b5b49SHorst Hummel while (from <= to) { 3989773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 3990445b5b49SHorst Hummel " CCW %p: %08X %08X DAT:", 3991445b5b49SHorst Hummel from, ((int *) from)[0], ((int *) from)[1]); 3992445b5b49SHorst Hummel 3993445b5b49SHorst Hummel /* get pointer to data (consider IDALs) */ 3994445b5b49SHorst Hummel if (from->flags & CCW_FLAG_IDA) 3995445b5b49SHorst Hummel datap = (char *) *((addr_t *) (addr_t) from->cda); 3996445b5b49SHorst Hummel else 3997445b5b49SHorst Hummel datap = (char *) ((addr_t) from->cda); 3998445b5b49SHorst Hummel 3999445b5b49SHorst Hummel /* dump data (max 32 bytes) */ 4000445b5b49SHorst Hummel for (count = 0; count < from->count && count < 32; count++) { 4001445b5b49SHorst Hummel if (count % 8 == 0) len += sprintf(page + len, " "); 4002445b5b49SHorst Hummel if (count % 4 == 0) len += sprintf(page + len, " "); 4003445b5b49SHorst Hummel len += sprintf(page + len, "%02x", datap[count]); 4004445b5b49SHorst Hummel } 4005445b5b49SHorst Hummel len += sprintf(page + len, "\n"); 4006445b5b49SHorst Hummel from++; 4007445b5b49SHorst Hummel } 4008445b5b49SHorst Hummel return len; 4009445b5b49SHorst Hummel } 4010445b5b49SHorst Hummel 4011fc19f381SStefan Haberland static void 4012aeec92caSStefan Haberland dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 4013aeec92caSStefan Haberland char *reason) 4014fc19f381SStefan Haberland { 4015fc19f381SStefan Haberland u64 *sense; 4016a5a0061fSStefan Weinhuber u64 *stat; 4017fc19f381SStefan Haberland 4018aeec92caSStefan Haberland sense = (u64 *) dasd_get_sense(irb); 4019a5a0061fSStefan Weinhuber stat = (u64 *) &irb->scsw; 4020fc19f381SStefan Haberland if (sense) { 4021a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " 4022a5a0061fSStefan Weinhuber "%016llx %016llx %016llx %016llx", 4023a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 4024ed3640b2SStefan Haberland sense[0], sense[1], sense[2], sense[3]); 4025fc19f381SStefan Haberland } else { 4026a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", 4027a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 4028a5a0061fSStefan Weinhuber "NO VALID SENSE"); 4029fc19f381SStefan Haberland } 4030fc19f381SStefan Haberland } 4031fc19f381SStefan Haberland 4032445b5b49SHorst Hummel /* 40331da177e4SLinus Torvalds * Print sense data and related channel program. 40341da177e4SLinus Torvalds * Parts are printed because printk buffer is only 1024 bytes. 40351da177e4SLinus Torvalds */ 4036f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 40378e09f215SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 40381da177e4SLinus Torvalds { 40391da177e4SLinus Torvalds char *page; 4040445b5b49SHorst Hummel struct ccw1 *first, *last, *fail, *from, *to; 4041445b5b49SHorst Hummel int len, sl, sct; 40421da177e4SLinus Torvalds 40431da177e4SLinus Torvalds page = (char *) get_zeroed_page(GFP_ATOMIC); 40441da177e4SLinus Torvalds if (page == NULL) { 4045fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 4046fc19f381SStefan Haberland "No memory to dump sense data\n"); 40471da177e4SLinus Torvalds return; 40481da177e4SLinus Torvalds } 4049445b5b49SHorst Hummel /* dump the sense data */ 4050773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 40511da177e4SLinus Torvalds " I/O status report for device %s:\n", 40522a0217d5SKay Sievers dev_name(&device->cdev->dev)); 4053773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4054a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 4055a5a0061fSStefan Weinhuber "CS:%02X RC:%d\n", 4056a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 4057a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 4058a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 4059a5a0061fSStefan Weinhuber req ? req->intrc : 0); 4060773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 40611da177e4SLinus Torvalds " device %s: Failing CCW: %p\n", 40622a0217d5SKay Sievers dev_name(&device->cdev->dev), 406323d805b6SPeter Oberparleiter (void *) (addr_t) irb->scsw.cmd.cpa); 40641da177e4SLinus Torvalds if (irb->esw.esw0.erw.cons) { 40651da177e4SLinus Torvalds for (sl = 0; sl < 4; sl++) { 4066773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 40671da177e4SLinus Torvalds " Sense(hex) %2d-%2d:", 40681da177e4SLinus Torvalds (8 * sl), ((8 * sl) + 7)); 40691da177e4SLinus Torvalds 40701da177e4SLinus Torvalds for (sct = 0; sct < 8; sct++) { 40711da177e4SLinus Torvalds len += sprintf(page + len, " %02x", 40721da177e4SLinus Torvalds irb->ecw[8 * sl + sct]); 40731da177e4SLinus Torvalds } 40741da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 40751da177e4SLinus Torvalds } 40761da177e4SLinus Torvalds 40771da177e4SLinus Torvalds if (irb->ecw[27] & DASD_SENSE_BIT_0) { 40781da177e4SLinus Torvalds /* 24 Byte Sense Data */ 4079773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 40801da177e4SLinus Torvalds " 24 Byte: %x MSG %x, " 40811da177e4SLinus Torvalds "%s MSGb to SYSOP\n", 40821da177e4SLinus Torvalds irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 40831da177e4SLinus Torvalds irb->ecw[1] & 0x10 ? "" : "no"); 40841da177e4SLinus Torvalds } else { 40851da177e4SLinus Torvalds /* 32 Byte Sense Data */ 4086773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 40871da177e4SLinus Torvalds " 32 Byte: Format: %x " 40881da177e4SLinus Torvalds "Exception class %x\n", 40891da177e4SLinus Torvalds irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 40901da177e4SLinus Torvalds } 40911da177e4SLinus Torvalds } else { 4092773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 40931da177e4SLinus Torvalds " SORRY - NO VALID SENSE AVAILABLE\n"); 40941da177e4SLinus Torvalds } 4095773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 40961da177e4SLinus Torvalds 40978e09f215SStefan Weinhuber if (req) { 40988e09f215SStefan Weinhuber /* req == NULL for unsolicited interrupts */ 4099445b5b49SHorst Hummel /* dump the Channel Program (max 140 Bytes per line) */ 4100445b5b49SHorst Hummel /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 4101445b5b49SHorst Hummel first = req->cpaddr; 4102445b5b49SHorst Hummel for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 4103445b5b49SHorst Hummel to = min(first + 6, last); 4104773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 41051da177e4SLinus Torvalds " Related CP in req: %p\n", req); 4106445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(first, to, page + len); 4107773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 41081da177e4SLinus Torvalds 4109445b5b49SHorst Hummel /* print failing CCW area (maximum 4) */ 4110445b5b49SHorst Hummel /* scsw->cda is either valid or zero */ 41111da177e4SLinus Torvalds len = 0; 4112445b5b49SHorst Hummel from = ++to; 411323d805b6SPeter Oberparleiter fail = (struct ccw1 *)(addr_t) 411423d805b6SPeter Oberparleiter irb->scsw.cmd.cpa; /* failing CCW */ 4115445b5b49SHorst Hummel if (from < fail - 2) { 4116445b5b49SHorst Hummel from = fail - 2; /* there is a gap - print header */ 4117773bab4aSSebastian Ott len += sprintf(page, PRINTK_HEADER "......\n"); 41181da177e4SLinus Torvalds } 4119445b5b49SHorst Hummel to = min(fail + 1, last); 4120445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, to, page + len); 41211da177e4SLinus Torvalds 4122445b5b49SHorst Hummel /* print last CCWs (maximum 2) */ 4123445b5b49SHorst Hummel from = max(from, ++to); 4124445b5b49SHorst Hummel if (from < last - 1) { 4125445b5b49SHorst Hummel from = last - 1; /* there is a gap - print header */ 4126773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER "......\n"); 41271da177e4SLinus Torvalds } 4128445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, last, page + len); 41291da177e4SLinus Torvalds if (len > 0) 4130773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 41318e09f215SStefan Weinhuber } 41321da177e4SLinus Torvalds free_page((unsigned long) page); 41331da177e4SLinus Torvalds } 41341da177e4SLinus Torvalds 4135f3eb5384SStefan Weinhuber 4136f3eb5384SStefan Weinhuber /* 4137f3eb5384SStefan Weinhuber * Print sense data from a tcw. 4138f3eb5384SStefan Weinhuber */ 4139f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 4140f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 4141f3eb5384SStefan Weinhuber { 4142f3eb5384SStefan Weinhuber char *page; 4143f3eb5384SStefan Weinhuber int len, sl, sct, residual; 4144f3eb5384SStefan Weinhuber struct tsb *tsb; 4145ef19298bSStefan Weinhuber u8 *sense, *rcq; 4146f3eb5384SStefan Weinhuber 4147f3eb5384SStefan Weinhuber page = (char *) get_zeroed_page(GFP_ATOMIC); 4148f3eb5384SStefan Weinhuber if (page == NULL) { 4149fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, " %s", 4150f3eb5384SStefan Weinhuber "No memory to dump sense data"); 4151f3eb5384SStefan Weinhuber return; 4152f3eb5384SStefan Weinhuber } 4153f3eb5384SStefan Weinhuber /* dump the sense data */ 4154773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 4155f3eb5384SStefan Weinhuber " I/O status report for device %s:\n", 4156f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev)); 4157773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4158a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 4159a5a0061fSStefan Weinhuber "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", 4160a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 4161a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 4162a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 4163a5a0061fSStefan Weinhuber irb->scsw.tm.fcxs, irb->scsw.tm.schxs, 4164a5a0061fSStefan Weinhuber req ? req->intrc : 0); 4165773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4166f3eb5384SStefan Weinhuber " device %s: Failing TCW: %p\n", 4167f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev), 4168f3eb5384SStefan Weinhuber (void *) (addr_t) irb->scsw.tm.tcw); 4169f3eb5384SStefan Weinhuber 4170f3eb5384SStefan Weinhuber tsb = NULL; 4171f3eb5384SStefan Weinhuber sense = NULL; 4172a5a0061fSStefan Weinhuber if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) 4173f3eb5384SStefan Weinhuber tsb = tcw_get_tsb( 4174f3eb5384SStefan Weinhuber (struct tcw *)(unsigned long)irb->scsw.tm.tcw); 4175f3eb5384SStefan Weinhuber 4176b8fde722SStefan Haberland if (tsb) { 4177773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4178f3eb5384SStefan Weinhuber " tsb->length %d\n", tsb->length); 4179773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4180f3eb5384SStefan Weinhuber " tsb->flags %x\n", tsb->flags); 4181773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4182f3eb5384SStefan Weinhuber " tsb->dcw_offset %d\n", tsb->dcw_offset); 4183773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4184f3eb5384SStefan Weinhuber " tsb->count %d\n", tsb->count); 4185f3eb5384SStefan Weinhuber residual = tsb->count - 28; 4186773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4187f3eb5384SStefan Weinhuber " residual %d\n", residual); 4188f3eb5384SStefan Weinhuber 4189f3eb5384SStefan Weinhuber switch (tsb->flags & 0x07) { 4190f3eb5384SStefan Weinhuber case 1: /* tsa_iostat */ 4191773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4192f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_time %d\n", 4193f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_time); 4194773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4195f3eb5384SStefan Weinhuber " tsb->tsa.iostat.def_time %d\n", 4196f3eb5384SStefan Weinhuber tsb->tsa.iostat.def_time); 4197773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4198f3eb5384SStefan Weinhuber " tsb->tsa.iostat.queue_time %d\n", 4199f3eb5384SStefan Weinhuber tsb->tsa.iostat.queue_time); 4200773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4201f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_busy_time %d\n", 4202f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_busy_time); 4203773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4204f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_act_time %d\n", 4205f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_act_time); 4206f3eb5384SStefan Weinhuber sense = tsb->tsa.iostat.sense; 4207f3eb5384SStefan Weinhuber break; 4208f3eb5384SStefan Weinhuber case 2: /* ts_ddpc */ 4209773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4210f3eb5384SStefan Weinhuber " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); 4211ef19298bSStefan Weinhuber for (sl = 0; sl < 2; sl++) { 4212773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4213ef19298bSStefan Weinhuber " tsb->tsa.ddpc.rcq %2d-%2d: ", 4214ef19298bSStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 4215ef19298bSStefan Weinhuber rcq = tsb->tsa.ddpc.rcq; 4216f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 4217f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 4218ef19298bSStefan Weinhuber rcq[8 * sl + sct]); 4219f3eb5384SStefan Weinhuber } 4220f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 4221f3eb5384SStefan Weinhuber } 4222f3eb5384SStefan Weinhuber sense = tsb->tsa.ddpc.sense; 4223f3eb5384SStefan Weinhuber break; 4224f3eb5384SStefan Weinhuber case 3: /* tsa_intrg */ 4225773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4226f3eb5384SStefan Weinhuber " tsb->tsa.intrg.: not supportet yet\n"); 4227f3eb5384SStefan Weinhuber break; 4228f3eb5384SStefan Weinhuber } 4229f3eb5384SStefan Weinhuber 4230f3eb5384SStefan Weinhuber if (sense) { 4231f3eb5384SStefan Weinhuber for (sl = 0; sl < 4; sl++) { 4232773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4233f3eb5384SStefan Weinhuber " Sense(hex) %2d-%2d:", 4234f3eb5384SStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 4235f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 4236f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 4237f3eb5384SStefan Weinhuber sense[8 * sl + sct]); 4238f3eb5384SStefan Weinhuber } 4239f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 4240f3eb5384SStefan Weinhuber } 4241f3eb5384SStefan Weinhuber 4242f3eb5384SStefan Weinhuber if (sense[27] & DASD_SENSE_BIT_0) { 4243f3eb5384SStefan Weinhuber /* 24 Byte Sense Data */ 4244773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4245f3eb5384SStefan Weinhuber " 24 Byte: %x MSG %x, " 4246f3eb5384SStefan Weinhuber "%s MSGb to SYSOP\n", 4247f3eb5384SStefan Weinhuber sense[7] >> 4, sense[7] & 0x0f, 4248f3eb5384SStefan Weinhuber sense[1] & 0x10 ? "" : "no"); 4249f3eb5384SStefan Weinhuber } else { 4250f3eb5384SStefan Weinhuber /* 32 Byte Sense Data */ 4251773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4252f3eb5384SStefan Weinhuber " 32 Byte: Format: %x " 4253f3eb5384SStefan Weinhuber "Exception class %x\n", 4254f3eb5384SStefan Weinhuber sense[6] & 0x0f, sense[22] >> 4); 4255f3eb5384SStefan Weinhuber } 4256f3eb5384SStefan Weinhuber } else { 4257773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4258f3eb5384SStefan Weinhuber " SORRY - NO VALID SENSE AVAILABLE\n"); 4259f3eb5384SStefan Weinhuber } 4260f3eb5384SStefan Weinhuber } else { 4261773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4262f3eb5384SStefan Weinhuber " SORRY - NO TSB DATA AVAILABLE\n"); 4263f3eb5384SStefan Weinhuber } 4264773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 4265f3eb5384SStefan Weinhuber free_page((unsigned long) page); 4266f3eb5384SStefan Weinhuber } 4267f3eb5384SStefan Weinhuber 4268f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense(struct dasd_device *device, 4269f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 4270f3eb5384SStefan Weinhuber { 4271a5a0061fSStefan Weinhuber if (scsw_is_tm(&irb->scsw)) 4272f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_tcw(device, req, irb); 4273f3eb5384SStefan Weinhuber else 4274f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_ccw(device, req, irb); 4275f3eb5384SStefan Weinhuber } 4276f3eb5384SStefan Weinhuber 4277501183f2SStefan Haberland static int dasd_eckd_pm_freeze(struct dasd_device *device) 4278d41dd122SStefan Haberland { 4279d41dd122SStefan Haberland /* 4280d41dd122SStefan Haberland * the device should be disconnected from our LCU structure 4281d41dd122SStefan Haberland * on restore we will reconnect it and reread LCU specific 4282d41dd122SStefan Haberland * information like PAV support that might have changed 4283d41dd122SStefan Haberland */ 4284d41dd122SStefan Haberland dasd_alias_remove_device(device); 4285d41dd122SStefan Haberland dasd_alias_disconnect_device_from_lcu(device); 4286d41dd122SStefan Haberland 4287d41dd122SStefan Haberland return 0; 4288d41dd122SStefan Haberland } 4289d41dd122SStefan Haberland 4290501183f2SStefan Haberland static int dasd_eckd_restore_device(struct dasd_device *device) 4291d41dd122SStefan Haberland { 4292d41dd122SStefan Haberland struct dasd_eckd_private *private; 42936fca97a9SStefan Haberland struct dasd_eckd_characteristics temp_rdc_data; 4294f9f8d02fSStefan Haberland int rc; 4295d41dd122SStefan Haberland struct dasd_uid temp_uid; 4296a7602f6cSStefan Haberland unsigned long flags; 4297ea4da6eaSStefan Haberland unsigned long cqr_flags = 0; 4298d41dd122SStefan Haberland 4299d41dd122SStefan Haberland private = (struct dasd_eckd_private *) device->private; 4300d41dd122SStefan Haberland 4301d41dd122SStefan Haberland /* Read Configuration Data */ 430255d3a85cSStefan Haberland dasd_eckd_read_conf(device); 4303d41dd122SStefan Haberland 43042dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 43052dedf0d9SStefan Haberland /* Generate device unique id */ 43062dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 43072dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4308d41dd122SStefan Haberland if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) 4309a7602f6cSStefan Haberland dev_err(&device->cdev->dev, "The UID of the DASD has " 4310a7602f6cSStefan Haberland "changed\n"); 43112dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4312d41dd122SStefan Haberland if (rc) 4313d41dd122SStefan Haberland goto out_err; 4314d41dd122SStefan Haberland 4315d41dd122SStefan Haberland /* register lcu with alias handling, enable PAV if this is a new lcu */ 4316f9f8d02fSStefan Haberland rc = dasd_alias_make_device_known_to_lcu(device); 4317f9f8d02fSStefan Haberland if (rc) 4318f9f8d02fSStefan Haberland return rc; 4319ea4da6eaSStefan Haberland 4320ea4da6eaSStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr_flags); 4321ea4da6eaSStefan Haberland dasd_eckd_validate_server(device, cqr_flags); 4322f4ac1d02SStefan Weinhuber 4323f4ac1d02SStefan Weinhuber /* RE-Read Configuration Data */ 432455d3a85cSStefan Haberland dasd_eckd_read_conf(device); 4325d41dd122SStefan Haberland 4326d41dd122SStefan Haberland /* Read Feature Codes */ 432768d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 4328d41dd122SStefan Haberland 4329d41dd122SStefan Haberland /* Read Device Characteristics */ 433068b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 43316fca97a9SStefan Haberland &temp_rdc_data, 64); 4332d41dd122SStefan Haberland if (rc) { 4333b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 4334b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 4335d41dd122SStefan Haberland goto out_err; 4336d41dd122SStefan Haberland } 4337a7602f6cSStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 43386fca97a9SStefan Haberland memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data)); 4339a7602f6cSStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4340d41dd122SStefan Haberland 4341d41dd122SStefan Haberland /* add device to alias management */ 4342d41dd122SStefan Haberland dasd_alias_add_device(device); 4343d41dd122SStefan Haberland 4344d41dd122SStefan Haberland return 0; 4345d41dd122SStefan Haberland 4346d41dd122SStefan Haberland out_err: 4347e6125fbaSStefan Haberland return -1; 4348d41dd122SStefan Haberland } 4349d41dd122SStefan Haberland 4350501183f2SStefan Haberland static int dasd_eckd_reload_device(struct dasd_device *device) 4351501183f2SStefan Haberland { 4352501183f2SStefan Haberland struct dasd_eckd_private *private; 4353501183f2SStefan Haberland int rc, old_base; 43542dedf0d9SStefan Haberland char print_uid[60]; 43552dedf0d9SStefan Haberland struct dasd_uid uid; 43562dedf0d9SStefan Haberland unsigned long flags; 4357501183f2SStefan Haberland 4358501183f2SStefan Haberland private = (struct dasd_eckd_private *) device->private; 43592dedf0d9SStefan Haberland 43602dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4361501183f2SStefan Haberland old_base = private->uid.base_unit_addr; 43622dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 43632dedf0d9SStefan Haberland 4364501183f2SStefan Haberland /* Read Configuration Data */ 4365501183f2SStefan Haberland rc = dasd_eckd_read_conf(device); 4366501183f2SStefan Haberland if (rc) 4367501183f2SStefan Haberland goto out_err; 4368501183f2SStefan Haberland 43692dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 4370501183f2SStefan Haberland if (rc) 4371501183f2SStefan Haberland goto out_err; 4372501183f2SStefan Haberland /* 4373501183f2SStefan Haberland * update unit address configuration and 4374501183f2SStefan Haberland * add device to alias management 4375501183f2SStefan Haberland */ 4376501183f2SStefan Haberland dasd_alias_update_add_device(device); 4377501183f2SStefan Haberland 43782dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &uid); 43792dedf0d9SStefan Haberland 43802dedf0d9SStefan Haberland if (old_base != uid.base_unit_addr) { 43812dedf0d9SStefan Haberland if (strlen(uid.vduit) > 0) 43822dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 43832dedf0d9SStefan Haberland "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial, 43842dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr, uid.vduit); 4385501183f2SStefan Haberland else 43862dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 43872dedf0d9SStefan Haberland "%s.%s.%04x.%02x", uid.vendor, uid.serial, 43882dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr); 4389501183f2SStefan Haberland 4390501183f2SStefan Haberland dev_info(&device->cdev->dev, 4391501183f2SStefan Haberland "An Alias device was reassigned to a new base device " 43922dedf0d9SStefan Haberland "with UID: %s\n", print_uid); 4393501183f2SStefan Haberland } 4394501183f2SStefan Haberland return 0; 4395501183f2SStefan Haberland 4396501183f2SStefan Haberland out_err: 4397501183f2SStefan Haberland return -1; 4398501183f2SStefan Haberland } 4399501183f2SStefan Haberland 4400d41dd122SStefan Haberland static struct ccw_driver dasd_eckd_driver = { 44013bda058bSSebastian Ott .driver = { 4402d41dd122SStefan Haberland .name = "dasd-eckd", 4403d41dd122SStefan Haberland .owner = THIS_MODULE, 44043bda058bSSebastian Ott }, 4405d41dd122SStefan Haberland .ids = dasd_eckd_ids, 4406d41dd122SStefan Haberland .probe = dasd_eckd_probe, 4407d41dd122SStefan Haberland .remove = dasd_generic_remove, 4408d41dd122SStefan Haberland .set_offline = dasd_generic_set_offline, 4409d41dd122SStefan Haberland .set_online = dasd_eckd_set_online, 4410d41dd122SStefan Haberland .notify = dasd_generic_notify, 4411a4d26c6aSStefan Weinhuber .path_event = dasd_generic_path_event, 44124679e893SStefan Haberland .shutdown = dasd_generic_shutdown, 4413d41dd122SStefan Haberland .freeze = dasd_generic_pm_freeze, 4414d41dd122SStefan Haberland .thaw = dasd_generic_restore_device, 4415d41dd122SStefan Haberland .restore = dasd_generic_restore_device, 4416a23ed009SStefan Haberland .uc_handler = dasd_generic_uc_handler, 4417420f42ecSHeiko Carstens .int_class = IRQIO_DAS, 4418d41dd122SStefan Haberland }; 4419f3eb5384SStefan Weinhuber 44201da177e4SLinus Torvalds /* 44211da177e4SLinus Torvalds * max_blocks is dependent on the amount of storage that is available 44221da177e4SLinus Torvalds * in the static io buffer for each device. Currently each device has 44231da177e4SLinus Torvalds * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has 44241da177e4SLinus Torvalds * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use 44251da177e4SLinus Torvalds * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In 44261da177e4SLinus Torvalds * addition we have one define extent ccw + 16 bytes of data and one 44271da177e4SLinus Torvalds * locate record ccw + 16 bytes of data. That makes: 44281da177e4SLinus Torvalds * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. 44291da177e4SLinus Torvalds * We want to fit two into the available memory so that we can immediately 44301da177e4SLinus Torvalds * start the next request if one finishes off. That makes 249.5 blocks 44311da177e4SLinus Torvalds * for one request. Give a little safety and the result is 240. 44321da177e4SLinus Torvalds */ 44331da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline = { 44341da177e4SLinus Torvalds .owner = THIS_MODULE, 44351da177e4SLinus Torvalds .name = "ECKD", 44361da177e4SLinus Torvalds .ebcname = "ECKD", 4437ef19298bSStefan Weinhuber .max_blocks = 190, 44381da177e4SLinus Torvalds .check_device = dasd_eckd_check_characteristics, 44398e09f215SStefan Weinhuber .uncheck_device = dasd_eckd_uncheck_device, 44401da177e4SLinus Torvalds .do_analysis = dasd_eckd_do_analysis, 4441a4d26c6aSStefan Weinhuber .verify_path = dasd_eckd_verify_path, 4442d42e1712SStefan Haberland .basic_to_ready = dasd_eckd_basic_to_ready, 44438e09f215SStefan Weinhuber .online_to_ready = dasd_eckd_online_to_ready, 4444d42e1712SStefan Haberland .ready_to_basic = dasd_eckd_ready_to_basic, 44451da177e4SLinus Torvalds .fill_geometry = dasd_eckd_fill_geometry, 44461da177e4SLinus Torvalds .start_IO = dasd_start_IO, 44471da177e4SLinus Torvalds .term_IO = dasd_term_IO, 44488e09f215SStefan Weinhuber .handle_terminated_request = dasd_eckd_handle_terminated_request, 44491da177e4SLinus Torvalds .format_device = dasd_eckd_format_device, 44501da177e4SLinus Torvalds .erp_action = dasd_eckd_erp_action, 44511da177e4SLinus Torvalds .erp_postaction = dasd_eckd_erp_postaction, 44525a27e60dSStefan Weinhuber .check_for_device_change = dasd_eckd_check_for_device_change, 44538e09f215SStefan Weinhuber .build_cp = dasd_eckd_build_alias_cp, 44548e09f215SStefan Weinhuber .free_cp = dasd_eckd_free_alias_cp, 44551da177e4SLinus Torvalds .dump_sense = dasd_eckd_dump_sense, 4456fc19f381SStefan Haberland .dump_sense_dbf = dasd_eckd_dump_sense_dbf, 44571da177e4SLinus Torvalds .fill_info = dasd_eckd_fill_info, 44581107ccfbSChristoph Hellwig .ioctl = dasd_eckd_ioctl, 4459d41dd122SStefan Haberland .freeze = dasd_eckd_pm_freeze, 4460d41dd122SStefan Haberland .restore = dasd_eckd_restore_device, 4461501183f2SStefan Haberland .reload = dasd_eckd_reload_device, 44622dedf0d9SStefan Haberland .get_uid = dasd_eckd_get_uid, 4463f1633031SStefan Haberland .kick_validate = dasd_eckd_kick_validate_server, 44641da177e4SLinus Torvalds }; 44651da177e4SLinus Torvalds 44661da177e4SLinus Torvalds static int __init 44671da177e4SLinus Torvalds dasd_eckd_init(void) 44681da177e4SLinus Torvalds { 4469736e6ea0SSebastian Ott int ret; 4470736e6ea0SSebastian Ott 44711da177e4SLinus Torvalds ASCEBC(dasd_eckd_discipline.ebcname, 4); 4472f932bceaSStefan Weinhuber dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), 4473f932bceaSStefan Weinhuber GFP_KERNEL | GFP_DMA); 4474f932bceaSStefan Weinhuber if (!dasd_reserve_req) 4475f932bceaSStefan Weinhuber return -ENOMEM; 4476a4d26c6aSStefan Weinhuber path_verification_worker = kmalloc(sizeof(*path_verification_worker), 4477a4d26c6aSStefan Weinhuber GFP_KERNEL | GFP_DMA); 4478a4d26c6aSStefan Weinhuber if (!path_verification_worker) { 4479a4d26c6aSStefan Weinhuber kfree(dasd_reserve_req); 4480a4d26c6aSStefan Weinhuber return -ENOMEM; 4481a4d26c6aSStefan Weinhuber } 4482736e6ea0SSebastian Ott ret = ccw_driver_register(&dasd_eckd_driver); 4483736e6ea0SSebastian Ott if (!ret) 4484736e6ea0SSebastian Ott wait_for_device_probe(); 4485a4d26c6aSStefan Weinhuber else { 4486a4d26c6aSStefan Weinhuber kfree(path_verification_worker); 4487f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 4488a4d26c6aSStefan Weinhuber } 4489736e6ea0SSebastian Ott return ret; 44901da177e4SLinus Torvalds } 44911da177e4SLinus Torvalds 44921da177e4SLinus Torvalds static void __exit 44931da177e4SLinus Torvalds dasd_eckd_cleanup(void) 44941da177e4SLinus Torvalds { 44951da177e4SLinus Torvalds ccw_driver_unregister(&dasd_eckd_driver); 4496a4d26c6aSStefan Weinhuber kfree(path_verification_worker); 4497f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 44981da177e4SLinus Torvalds } 44991da177e4SLinus Torvalds 45001da177e4SLinus Torvalds module_init(dasd_eckd_init); 45011da177e4SLinus Torvalds module_exit(dasd_eckd_cleanup); 4502