11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * File...........: linux/drivers/s390/block/dasd_eckd.c 31da177e4SLinus Torvalds * Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com> 41da177e4SLinus Torvalds * Horst Hummel <Horst.Hummel@de.ibm.com> 51da177e4SLinus Torvalds * Carsten Otte <Cotte@de.ibm.com> 61da177e4SLinus Torvalds * Martin Schwidefsky <schwidefsky@de.ibm.com> 71da177e4SLinus Torvalds * Bugreports.to..: <Linux390@de.ibm.com> 8d41dd122SStefan Haberland * Copyright IBM Corp. 1999, 2009 9ab1d848fSNigel Hislop * EMC Symmetrix ioctl Copyright EMC Corporation, 2008 10ab1d848fSNigel Hislop * Author.........: Nigel Hislop <hislop_nigel@emc.com> 111da177e4SLinus Torvalds */ 121da177e4SLinus Torvalds 13ca99dab0SStefan Haberland #define KMSG_COMPONENT "dasd-eckd" 14fc19f381SStefan Haberland 151da177e4SLinus Torvalds #include <linux/stddef.h> 161da177e4SLinus Torvalds #include <linux/kernel.h> 171da177e4SLinus Torvalds #include <linux/slab.h> 181da177e4SLinus Torvalds #include <linux/hdreg.h> /* HDIO_GETGEO */ 191da177e4SLinus Torvalds #include <linux/bio.h> 201da177e4SLinus Torvalds #include <linux/module.h> 211da177e4SLinus Torvalds #include <linux/init.h> 221da177e4SLinus Torvalds 231da177e4SLinus Torvalds #include <asm/debug.h> 241da177e4SLinus Torvalds #include <asm/idals.h> 251da177e4SLinus Torvalds #include <asm/ebcdic.h> 26f8b06859SHeiko Carstens #include <asm/compat.h> 271da177e4SLinus Torvalds #include <asm/io.h> 281da177e4SLinus Torvalds #include <asm/uaccess.h> 2940545573SHorst Hummel #include <asm/cio.h> 301da177e4SLinus Torvalds #include <asm/ccwdev.h> 31f3eb5384SStefan Weinhuber #include <asm/itcw.h> 321da177e4SLinus Torvalds 331da177e4SLinus Torvalds #include "dasd_int.h" 341da177e4SLinus Torvalds #include "dasd_eckd.h" 35f3eb5384SStefan Weinhuber #include "../cio/chsc.h" 36f3eb5384SStefan Weinhuber 371da177e4SLinus Torvalds 381da177e4SLinus Torvalds #ifdef PRINTK_HEADER 391da177e4SLinus Torvalds #undef PRINTK_HEADER 401da177e4SLinus Torvalds #endif /* PRINTK_HEADER */ 411da177e4SLinus Torvalds #define PRINTK_HEADER "dasd(eckd):" 421da177e4SLinus Torvalds 431da177e4SLinus Torvalds #define ECKD_C0(i) (i->home_bytes) 441da177e4SLinus Torvalds #define ECKD_F(i) (i->formula) 451da177e4SLinus Torvalds #define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\ 461da177e4SLinus Torvalds (i->factors.f_0x02.f1)) 471da177e4SLinus Torvalds #define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\ 481da177e4SLinus Torvalds (i->factors.f_0x02.f2)) 491da177e4SLinus Torvalds #define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\ 501da177e4SLinus Torvalds (i->factors.f_0x02.f3)) 511da177e4SLinus Torvalds #define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0) 521da177e4SLinus Torvalds #define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0) 531da177e4SLinus Torvalds #define ECKD_F6(i) (i->factor6) 541da177e4SLinus Torvalds #define ECKD_F7(i) (i->factor7) 551da177e4SLinus Torvalds #define ECKD_F8(i) (i->factor8) 561da177e4SLinus Torvalds 57e4dbb0f2SStefan Haberland /* 58e4dbb0f2SStefan Haberland * raw track access always map to 64k in memory 59e4dbb0f2SStefan Haberland * so it maps to 16 blocks of 4k per track 60e4dbb0f2SStefan Haberland */ 61e4dbb0f2SStefan Haberland #define DASD_RAW_BLOCK_PER_TRACK 16 62e4dbb0f2SStefan Haberland #define DASD_RAW_BLOCKSIZE 4096 63e4dbb0f2SStefan Haberland /* 64k are 128 x 512 byte sectors */ 64e4dbb0f2SStefan Haberland #define DASD_RAW_SECTORS_PER_TRACK 128 65e4dbb0f2SStefan Haberland 661da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 671da177e4SLinus Torvalds 681da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline; 691da177e4SLinus Torvalds 701da177e4SLinus Torvalds /* The ccw bus type uses this table to find devices that it sends to 711da177e4SLinus Torvalds * dasd_eckd_probe */ 721da177e4SLinus Torvalds static struct ccw_device_id dasd_eckd_ids[] = { 73d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1}, 74d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2}, 755da24b76SStefan Haberland { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3380, 0), .driver_info = 0x3}, 76d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4}, 77d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5}, 78d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6}, 79d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7}, 80d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8}, 81d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9}, 82d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa}, 831da177e4SLinus Torvalds { /* end of list */ }, 841da177e4SLinus Torvalds }; 851da177e4SLinus Torvalds 861da177e4SLinus Torvalds MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids); 871da177e4SLinus Torvalds 881da177e4SLinus Torvalds static struct ccw_driver dasd_eckd_driver; /* see below */ 891da177e4SLinus Torvalds 90eb6e199bSStefan Weinhuber #define INIT_CQR_OK 0 91eb6e199bSStefan Weinhuber #define INIT_CQR_UNFORMATTED 1 92eb6e199bSStefan Weinhuber #define INIT_CQR_ERROR 2 93eb6e199bSStefan Weinhuber 94f932bceaSStefan Weinhuber /* emergency request for reserve/release */ 95f932bceaSStefan Weinhuber static struct { 96f932bceaSStefan Weinhuber struct dasd_ccw_req cqr; 97f932bceaSStefan Weinhuber struct ccw1 ccw; 98f932bceaSStefan Weinhuber char data[32]; 99f932bceaSStefan Weinhuber } *dasd_reserve_req; 100f932bceaSStefan Weinhuber static DEFINE_MUTEX(dasd_reserve_mutex); 101f932bceaSStefan Weinhuber 102a4d26c6aSStefan Weinhuber /* definitions for the path verification worker */ 103a4d26c6aSStefan Weinhuber struct path_verification_work_data { 104a4d26c6aSStefan Weinhuber struct work_struct worker; 105a4d26c6aSStefan Weinhuber struct dasd_device *device; 106a4d26c6aSStefan Weinhuber struct dasd_ccw_req cqr; 107a4d26c6aSStefan Weinhuber struct ccw1 ccw; 108a4d26c6aSStefan Weinhuber __u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE]; 109a4d26c6aSStefan Weinhuber int isglobal; 110a4d26c6aSStefan Weinhuber __u8 tbvpm; 111a4d26c6aSStefan Weinhuber }; 112a4d26c6aSStefan Weinhuber static struct path_verification_work_data *path_verification_worker; 113a4d26c6aSStefan Weinhuber static DEFINE_MUTEX(dasd_path_verification_mutex); 114eb6e199bSStefan Weinhuber 1151da177e4SLinus Torvalds /* initial attempt at a probe function. this can be simplified once 1161da177e4SLinus Torvalds * the other detection code is gone */ 1171da177e4SLinus Torvalds static int 1181da177e4SLinus Torvalds dasd_eckd_probe (struct ccw_device *cdev) 1191da177e4SLinus Torvalds { 1201da177e4SLinus Torvalds int ret; 1211da177e4SLinus Torvalds 12240545573SHorst Hummel /* set ECKD specific ccw-device options */ 123454e1fa1SPeter Oberparleiter ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE | 124454e1fa1SPeter Oberparleiter CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH); 12540545573SHorst Hummel if (ret) { 126b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s", 127b8ed5dd5SStefan Haberland "dasd_eckd_probe: could not set " 128b8ed5dd5SStefan Haberland "ccw-device options"); 1291da177e4SLinus Torvalds return ret; 13040545573SHorst Hummel } 13140545573SHorst Hummel ret = dasd_generic_probe(cdev, &dasd_eckd_discipline); 13240545573SHorst Hummel return ret; 1331da177e4SLinus Torvalds } 1341da177e4SLinus Torvalds 1351da177e4SLinus Torvalds static int 1361da177e4SLinus Torvalds dasd_eckd_set_online(struct ccw_device *cdev) 1371da177e4SLinus Torvalds { 1381da177e4SLinus Torvalds return dasd_generic_set_online(cdev, &dasd_eckd_discipline); 1391da177e4SLinus Torvalds } 1401da177e4SLinus Torvalds 1411da177e4SLinus Torvalds static const int sizes_trk0[] = { 28, 148, 84 }; 1421da177e4SLinus Torvalds #define LABEL_SIZE 140 1431da177e4SLinus Torvalds 1441da177e4SLinus Torvalds static inline unsigned int 1451da177e4SLinus Torvalds round_up_multiple(unsigned int no, unsigned int mult) 1461da177e4SLinus Torvalds { 1471da177e4SLinus Torvalds int rem = no % mult; 1481da177e4SLinus Torvalds return (rem ? no - rem + mult : no); 1491da177e4SLinus Torvalds } 1501da177e4SLinus Torvalds 1511da177e4SLinus Torvalds static inline unsigned int 1521da177e4SLinus Torvalds ceil_quot(unsigned int d1, unsigned int d2) 1531da177e4SLinus Torvalds { 1541da177e4SLinus Torvalds return (d1 + (d2 - 1)) / d2; 1551da177e4SLinus Torvalds } 1561da177e4SLinus Torvalds 1574d284cacSHeiko Carstens static unsigned int 1581da177e4SLinus Torvalds recs_per_track(struct dasd_eckd_characteristics * rdc, 1591da177e4SLinus Torvalds unsigned int kl, unsigned int dl) 1601da177e4SLinus Torvalds { 1611da177e4SLinus Torvalds int dn, kn; 1621da177e4SLinus Torvalds 1631da177e4SLinus Torvalds switch (rdc->dev_type) { 1641da177e4SLinus Torvalds case 0x3380: 1651da177e4SLinus Torvalds if (kl) 1661da177e4SLinus Torvalds return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + 1671da177e4SLinus Torvalds ceil_quot(dl + 12, 32)); 1681da177e4SLinus Torvalds else 1691da177e4SLinus Torvalds return 1499 / (15 + ceil_quot(dl + 12, 32)); 1701da177e4SLinus Torvalds case 0x3390: 1711da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1721da177e4SLinus Torvalds if (kl) { 1731da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1741da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + 1751da177e4SLinus Torvalds 9 + ceil_quot(dl + 6 * dn, 34)); 1761da177e4SLinus Torvalds } else 1771da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); 1781da177e4SLinus Torvalds case 0x9345: 1791da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1801da177e4SLinus Torvalds if (kl) { 1811da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1821da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + 1831da177e4SLinus Torvalds ceil_quot(dl + 6 * dn, 34)); 1841da177e4SLinus Torvalds } else 1851da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); 1861da177e4SLinus Torvalds } 1871da177e4SLinus Torvalds return 0; 1881da177e4SLinus Torvalds } 1891da177e4SLinus Torvalds 190b44b0ab3SStefan Weinhuber static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head) 191b44b0ab3SStefan Weinhuber { 192b44b0ab3SStefan Weinhuber geo->cyl = (__u16) cyl; 193b44b0ab3SStefan Weinhuber geo->head = cyl >> 16; 194b44b0ab3SStefan Weinhuber geo->head <<= 4; 195b44b0ab3SStefan Weinhuber geo->head |= head; 196b44b0ab3SStefan Weinhuber } 197b44b0ab3SStefan Weinhuber 1984d284cacSHeiko Carstens static int 1991da177e4SLinus Torvalds check_XRC (struct ccw1 *de_ccw, 2001da177e4SLinus Torvalds struct DE_eckd_data *data, 2011da177e4SLinus Torvalds struct dasd_device *device) 2021da177e4SLinus Torvalds { 2031da177e4SLinus Torvalds struct dasd_eckd_private *private; 204d54853efSMartin Schwidefsky int rc; 2051da177e4SLinus Torvalds 2061da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 207d54853efSMartin Schwidefsky if (!private->rdc_data.facilities.XRC_supported) 208d54853efSMartin Schwidefsky return 0; 2091da177e4SLinus Torvalds 2101da177e4SLinus Torvalds /* switch on System Time Stamp - needed for XRC Support */ 2111da177e4SLinus Torvalds data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ 2121da177e4SLinus Torvalds data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ 2131da177e4SLinus Torvalds 214d54853efSMartin Schwidefsky rc = get_sync_clock(&data->ep_sys_time); 215d54853efSMartin Schwidefsky /* Ignore return code if sync clock is switched off. */ 216d54853efSMartin Schwidefsky if (rc == -ENOSYS || rc == -EACCES) 217d54853efSMartin Schwidefsky rc = 0; 2181da177e4SLinus Torvalds 2191da177e4SLinus Torvalds de_ccw->count = sizeof(struct DE_eckd_data); 2201da177e4SLinus Torvalds de_ccw->flags |= CCW_FLAG_SLI; 221d54853efSMartin Schwidefsky return rc; 2221da177e4SLinus Torvalds } 2231da177e4SLinus Torvalds 2244d284cacSHeiko Carstens static int 225b44b0ab3SStefan Weinhuber define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk, 226b44b0ab3SStefan Weinhuber unsigned int totrk, int cmd, struct dasd_device *device) 2271da177e4SLinus Torvalds { 2281da177e4SLinus Torvalds struct dasd_eckd_private *private; 229b44b0ab3SStefan Weinhuber u32 begcyl, endcyl; 230b44b0ab3SStefan Weinhuber u16 heads, beghead, endhead; 231d54853efSMartin Schwidefsky int rc = 0; 2321da177e4SLinus Torvalds 2331da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 2341da177e4SLinus Torvalds 2351da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; 2361da177e4SLinus Torvalds ccw->flags = 0; 2371da177e4SLinus Torvalds ccw->count = 16; 2381da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 2391da177e4SLinus Torvalds 2401da177e4SLinus Torvalds memset(data, 0, sizeof(struct DE_eckd_data)); 2411da177e4SLinus Torvalds switch (cmd) { 2421da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 2431da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 2441da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 2451da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 2461da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 2471da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 2481da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 2491da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 2501da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_COUNT: 2511da177e4SLinus Torvalds data->mask.perm = 0x1; 2521da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 2531da177e4SLinus Torvalds break; 2541da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 2551da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 2561da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 2571da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 2581da177e4SLinus Torvalds data->mask.perm = 0x02; 2591da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 260d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2611da177e4SLinus Torvalds break; 2621da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 2631da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 2641da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 265d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2661da177e4SLinus Torvalds break; 2671da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 2681da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 2691da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 2701da177e4SLinus Torvalds data->mask.perm = 0x3; 2711da177e4SLinus Torvalds data->mask.auth = 0x1; 2721da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 273d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2741da177e4SLinus Torvalds break; 2751da177e4SLinus Torvalds default: 276fc19f381SStefan Haberland dev_err(&device->cdev->dev, 277fc19f381SStefan Haberland "0x%x is not a known command\n", cmd); 2781da177e4SLinus Torvalds break; 2791da177e4SLinus Torvalds } 2801da177e4SLinus Torvalds 2811da177e4SLinus Torvalds data->attributes.mode = 0x3; /* ECKD */ 2821da177e4SLinus Torvalds 2831da177e4SLinus Torvalds if ((private->rdc_data.cu_type == 0x2105 || 2841da177e4SLinus Torvalds private->rdc_data.cu_type == 0x2107 || 2851da177e4SLinus Torvalds private->rdc_data.cu_type == 0x1750) 2861da177e4SLinus Torvalds && !(private->uses_cdl && trk < 2)) 2871da177e4SLinus Torvalds data->ga_extended |= 0x40; /* Regular Data Format Mode */ 2881da177e4SLinus Torvalds 289b44b0ab3SStefan Weinhuber heads = private->rdc_data.trk_per_cyl; 290b44b0ab3SStefan Weinhuber begcyl = trk / heads; 291b44b0ab3SStefan Weinhuber beghead = trk % heads; 292b44b0ab3SStefan Weinhuber endcyl = totrk / heads; 293b44b0ab3SStefan Weinhuber endhead = totrk % heads; 2941da177e4SLinus Torvalds 2951da177e4SLinus Torvalds /* check for sequential prestage - enhance cylinder range */ 2961da177e4SLinus Torvalds if (data->attributes.operation == DASD_SEQ_PRESTAGE || 2971da177e4SLinus Torvalds data->attributes.operation == DASD_SEQ_ACCESS) { 2981da177e4SLinus Torvalds 299b44b0ab3SStefan Weinhuber if (endcyl + private->attrib.nr_cyl < private->real_cyl) 300b44b0ab3SStefan Weinhuber endcyl += private->attrib.nr_cyl; 3011da177e4SLinus Torvalds else 302b44b0ab3SStefan Weinhuber endcyl = (private->real_cyl - 1); 3031da177e4SLinus Torvalds } 3041da177e4SLinus Torvalds 305b44b0ab3SStefan Weinhuber set_ch_t(&data->beg_ext, begcyl, beghead); 306b44b0ab3SStefan Weinhuber set_ch_t(&data->end_ext, endcyl, endhead); 307d54853efSMartin Schwidefsky return rc; 3081da177e4SLinus Torvalds } 3091da177e4SLinus Torvalds 3108e09f215SStefan Weinhuber static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata, 3118e09f215SStefan Weinhuber struct dasd_device *device) 3128e09f215SStefan Weinhuber { 3138e09f215SStefan Weinhuber struct dasd_eckd_private *private; 3148e09f215SStefan Weinhuber int rc; 3158e09f215SStefan Weinhuber 3168e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 3178e09f215SStefan Weinhuber if (!private->rdc_data.facilities.XRC_supported) 3188e09f215SStefan Weinhuber return 0; 3198e09f215SStefan Weinhuber 3208e09f215SStefan Weinhuber /* switch on System Time Stamp - needed for XRC Support */ 321f3eb5384SStefan Weinhuber pfxdata->define_extent.ga_extended |= 0x08; /* 'Time Stamp Valid' */ 322f3eb5384SStefan Weinhuber pfxdata->define_extent.ga_extended |= 0x02; /* 'Extended Parameter' */ 3238e09f215SStefan Weinhuber pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */ 3248e09f215SStefan Weinhuber 325f3eb5384SStefan Weinhuber rc = get_sync_clock(&pfxdata->define_extent.ep_sys_time); 3268e09f215SStefan Weinhuber /* Ignore return code if sync clock is switched off. */ 3278e09f215SStefan Weinhuber if (rc == -ENOSYS || rc == -EACCES) 3288e09f215SStefan Weinhuber rc = 0; 3298e09f215SStefan Weinhuber return rc; 3308e09f215SStefan Weinhuber } 3318e09f215SStefan Weinhuber 332f3eb5384SStefan Weinhuber static void fill_LRE_data(struct LRE_eckd_data *data, unsigned int trk, 333f3eb5384SStefan Weinhuber unsigned int rec_on_trk, int count, int cmd, 334f3eb5384SStefan Weinhuber struct dasd_device *device, unsigned int reclen, 335f3eb5384SStefan Weinhuber unsigned int tlf) 336f3eb5384SStefan Weinhuber { 337f3eb5384SStefan Weinhuber struct dasd_eckd_private *private; 338f3eb5384SStefan Weinhuber int sector; 339f3eb5384SStefan Weinhuber int dn, d; 340f3eb5384SStefan Weinhuber 341f3eb5384SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 342f3eb5384SStefan Weinhuber 343f3eb5384SStefan Weinhuber memset(data, 0, sizeof(*data)); 344f3eb5384SStefan Weinhuber sector = 0; 345f3eb5384SStefan Weinhuber if (rec_on_trk) { 346f3eb5384SStefan Weinhuber switch (private->rdc_data.dev_type) { 347f3eb5384SStefan Weinhuber case 0x3390: 348f3eb5384SStefan Weinhuber dn = ceil_quot(reclen + 6, 232); 349f3eb5384SStefan Weinhuber d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 350f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 351f3eb5384SStefan Weinhuber break; 352f3eb5384SStefan Weinhuber case 0x3380: 353f3eb5384SStefan Weinhuber d = 7 + ceil_quot(reclen + 12, 32); 354f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 355f3eb5384SStefan Weinhuber break; 356f3eb5384SStefan Weinhuber } 357f3eb5384SStefan Weinhuber } 358f3eb5384SStefan Weinhuber data->sector = sector; 359f3eb5384SStefan Weinhuber /* note: meaning of count depends on the operation 360f3eb5384SStefan Weinhuber * for record based I/O it's the number of records, but for 361f3eb5384SStefan Weinhuber * track based I/O it's the number of tracks 362f3eb5384SStefan Weinhuber */ 363f3eb5384SStefan Weinhuber data->count = count; 364f3eb5384SStefan Weinhuber switch (cmd) { 365f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 366f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 367f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 368f3eb5384SStefan Weinhuber break; 369f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_HOME_ADDRESS: 370f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 371f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 372f3eb5384SStefan Weinhuber break; 373f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 374f3eb5384SStefan Weinhuber data->operation.orientation = 0x1; 375f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 376f3eb5384SStefan Weinhuber data->count++; 377f3eb5384SStefan Weinhuber break; 378f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_RECORD_ZERO: 379f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 380f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 381f3eb5384SStefan Weinhuber data->count++; 382f3eb5384SStefan Weinhuber break; 383f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE: 384f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_MT: 385f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD: 386f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD_MT: 387f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 388f3eb5384SStefan Weinhuber data->length = reclen; 389f3eb5384SStefan Weinhuber data->operation.operation = 0x01; 390f3eb5384SStefan Weinhuber break; 391f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD: 392f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD_MT: 393f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 394f3eb5384SStefan Weinhuber data->length = reclen; 395f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 396f3eb5384SStefan Weinhuber break; 397e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_WRITE_FULL_TRACK: 398e4dbb0f2SStefan Haberland data->operation.orientation = 0x0; 399e4dbb0f2SStefan Haberland data->operation.operation = 0x3F; 400e4dbb0f2SStefan Haberland data->extended_operation = 0x11; 401e4dbb0f2SStefan Haberland data->length = 0; 402e4dbb0f2SStefan Haberland data->extended_parameter_length = 0x02; 403e4dbb0f2SStefan Haberland if (data->count > 8) { 404e4dbb0f2SStefan Haberland data->extended_parameter[0] = 0xFF; 405e4dbb0f2SStefan Haberland data->extended_parameter[1] = 0xFF; 406e4dbb0f2SStefan Haberland data->extended_parameter[1] <<= (16 - count); 407e4dbb0f2SStefan Haberland } else { 408e4dbb0f2SStefan Haberland data->extended_parameter[0] = 0xFF; 409e4dbb0f2SStefan Haberland data->extended_parameter[0] <<= (8 - count); 410e4dbb0f2SStefan Haberland data->extended_parameter[1] = 0x00; 411e4dbb0f2SStefan Haberland } 412e4dbb0f2SStefan Haberland data->sector = 0xFF; 413e4dbb0f2SStefan Haberland break; 414f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 415f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 416f3eb5384SStefan Weinhuber data->length = reclen; /* not tlf, as one might think */ 417f3eb5384SStefan Weinhuber data->operation.operation = 0x3F; 418f3eb5384SStefan Weinhuber data->extended_operation = 0x23; 419f3eb5384SStefan Weinhuber break; 420f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ: 421f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_MT: 422f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_KD: 423f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_KD_MT: 424f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 425f3eb5384SStefan Weinhuber data->length = reclen; 426f3eb5384SStefan Weinhuber data->operation.operation = 0x06; 427f3eb5384SStefan Weinhuber break; 428f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD: 429f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD_MT: 430f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 431f3eb5384SStefan Weinhuber data->length = reclen; 432f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 433f3eb5384SStefan Weinhuber break; 434f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_COUNT: 435f3eb5384SStefan Weinhuber data->operation.operation = 0x06; 436f3eb5384SStefan Weinhuber break; 437e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_READ_TRACK: 438e4dbb0f2SStefan Haberland data->operation.orientation = 0x1; 439e4dbb0f2SStefan Haberland data->operation.operation = 0x0C; 440e4dbb0f2SStefan Haberland data->extended_parameter_length = 0; 441e4dbb0f2SStefan Haberland data->sector = 0xFF; 442e4dbb0f2SStefan Haberland break; 443f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 444f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 445f3eb5384SStefan Weinhuber data->length = tlf; 446f3eb5384SStefan Weinhuber data->operation.operation = 0x0C; 447f3eb5384SStefan Weinhuber break; 448f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_ERASE: 449f3eb5384SStefan Weinhuber data->length = reclen; 450f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 451f3eb5384SStefan Weinhuber data->operation.operation = 0x0b; 452f3eb5384SStefan Weinhuber break; 453f3eb5384SStefan Weinhuber default: 454f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, device, 455f3eb5384SStefan Weinhuber "fill LRE unknown opcode 0x%x", cmd); 456f3eb5384SStefan Weinhuber BUG(); 457f3eb5384SStefan Weinhuber } 458f3eb5384SStefan Weinhuber set_ch_t(&data->seek_addr, 459f3eb5384SStefan Weinhuber trk / private->rdc_data.trk_per_cyl, 460f3eb5384SStefan Weinhuber trk % private->rdc_data.trk_per_cyl); 461f3eb5384SStefan Weinhuber data->search_arg.cyl = data->seek_addr.cyl; 462f3eb5384SStefan Weinhuber data->search_arg.head = data->seek_addr.head; 463f3eb5384SStefan Weinhuber data->search_arg.record = rec_on_trk; 464f3eb5384SStefan Weinhuber } 465f3eb5384SStefan Weinhuber 466f3eb5384SStefan Weinhuber static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 467b44b0ab3SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 468f3eb5384SStefan Weinhuber struct dasd_device *basedev, struct dasd_device *startdev, 469f3eb5384SStefan Weinhuber unsigned char format, unsigned int rec_on_trk, int count, 470f3eb5384SStefan Weinhuber unsigned int blksize, unsigned int tlf) 4718e09f215SStefan Weinhuber { 4728e09f215SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 473f3eb5384SStefan Weinhuber struct DE_eckd_data *dedata; 474f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 475b44b0ab3SStefan Weinhuber u32 begcyl, endcyl; 476b44b0ab3SStefan Weinhuber u16 heads, beghead, endhead; 4778e09f215SStefan Weinhuber int rc = 0; 4788e09f215SStefan Weinhuber 4798e09f215SStefan Weinhuber basepriv = (struct dasd_eckd_private *) basedev->private; 4808e09f215SStefan Weinhuber startpriv = (struct dasd_eckd_private *) startdev->private; 481f3eb5384SStefan Weinhuber dedata = &pfxdata->define_extent; 482f3eb5384SStefan Weinhuber lredata = &pfxdata->locate_record; 4838e09f215SStefan Weinhuber 4848e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PFX; 4858e09f215SStefan Weinhuber ccw->flags = 0; 486e4dbb0f2SStefan Haberland if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) { 487e4dbb0f2SStefan Haberland ccw->count = sizeof(*pfxdata) + 2; 488e4dbb0f2SStefan Haberland ccw->cda = (__u32) __pa(pfxdata); 489e4dbb0f2SStefan Haberland memset(pfxdata, 0, sizeof(*pfxdata) + 2); 490e4dbb0f2SStefan Haberland } else { 4918e09f215SStefan Weinhuber ccw->count = sizeof(*pfxdata); 4928e09f215SStefan Weinhuber ccw->cda = (__u32) __pa(pfxdata); 4938e09f215SStefan Weinhuber memset(pfxdata, 0, sizeof(*pfxdata)); 494e4dbb0f2SStefan Haberland } 495e4dbb0f2SStefan Haberland 4968e09f215SStefan Weinhuber /* prefix data */ 497f3eb5384SStefan Weinhuber if (format > 1) { 498f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 499f3eb5384SStefan Weinhuber "PFX LRE unknown format 0x%x", format); 500f3eb5384SStefan Weinhuber BUG(); 501f3eb5384SStefan Weinhuber return -EINVAL; 502f3eb5384SStefan Weinhuber } 503f3eb5384SStefan Weinhuber pfxdata->format = format; 5044abb08c2SStefan Weinhuber pfxdata->base_address = basepriv->ned->unit_addr; 5054abb08c2SStefan Weinhuber pfxdata->base_lss = basepriv->ned->ID; 506f3eb5384SStefan Weinhuber pfxdata->validity.define_extent = 1; 5078e09f215SStefan Weinhuber 5088e09f215SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 5098e09f215SStefan Weinhuber if (startpriv->uid.type != UA_BASE_DEVICE) { 5108e09f215SStefan Weinhuber pfxdata->validity.verify_base = 1; 5118e09f215SStefan Weinhuber if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 5128e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 1; 5138e09f215SStefan Weinhuber } 5148e09f215SStefan Weinhuber 5158e09f215SStefan Weinhuber /* define extend data (mostly)*/ 5168e09f215SStefan Weinhuber switch (cmd) { 5178e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_HOME_ADDRESS: 5188e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_RECORD_ZERO: 5198e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ: 5208e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_MT: 5218e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD: 5228e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD_MT: 5238e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_KD: 5248e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_KD_MT: 5258e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_COUNT: 526f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 527f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 528f3eb5384SStefan Weinhuber break; 529e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_READ_TRACK: 530f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 531f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 532f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 533f3eb5384SStefan Weinhuber dedata->blk_size = 0; 5348e09f215SStefan Weinhuber break; 5358e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE: 5368e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_MT: 5378e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD: 5388e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD_MT: 539f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 540f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 5418e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 5428e09f215SStefan Weinhuber break; 5438e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD: 5448e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD_MT: 545f3eb5384SStefan Weinhuber dedata->attributes.operation = DASD_BYPASS_CACHE; 5468e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 5478e09f215SStefan Weinhuber break; 5488e09f215SStefan Weinhuber case DASD_ECKD_CCW_ERASE: 5498e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 5508e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 551f3eb5384SStefan Weinhuber dedata->mask.perm = 0x3; 552f3eb5384SStefan Weinhuber dedata->mask.auth = 0x1; 553f3eb5384SStefan Weinhuber dedata->attributes.operation = DASD_BYPASS_CACHE; 554f3eb5384SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 555f3eb5384SStefan Weinhuber break; 556e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_WRITE_FULL_TRACK: 557e4dbb0f2SStefan Haberland dedata->mask.perm = 0x03; 558e4dbb0f2SStefan Haberland dedata->attributes.operation = basepriv->attrib.operation; 559e4dbb0f2SStefan Haberland dedata->blk_size = 0; 560e4dbb0f2SStefan Haberland break; 561f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 562f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 563f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 564f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 5658e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 5668e09f215SStefan Weinhuber break; 5678e09f215SStefan Weinhuber default: 568f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 569f3eb5384SStefan Weinhuber "PFX LRE unknown opcode 0x%x", cmd); 570f3eb5384SStefan Weinhuber BUG(); 571f3eb5384SStefan Weinhuber return -EINVAL; 5728e09f215SStefan Weinhuber } 5738e09f215SStefan Weinhuber 574f3eb5384SStefan Weinhuber dedata->attributes.mode = 0x3; /* ECKD */ 5758e09f215SStefan Weinhuber 5768e09f215SStefan Weinhuber if ((basepriv->rdc_data.cu_type == 0x2105 || 5778e09f215SStefan Weinhuber basepriv->rdc_data.cu_type == 0x2107 || 5788e09f215SStefan Weinhuber basepriv->rdc_data.cu_type == 0x1750) 5798e09f215SStefan Weinhuber && !(basepriv->uses_cdl && trk < 2)) 580f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x40; /* Regular Data Format Mode */ 5818e09f215SStefan Weinhuber 582b44b0ab3SStefan Weinhuber heads = basepriv->rdc_data.trk_per_cyl; 583b44b0ab3SStefan Weinhuber begcyl = trk / heads; 584b44b0ab3SStefan Weinhuber beghead = trk % heads; 585b44b0ab3SStefan Weinhuber endcyl = totrk / heads; 586b44b0ab3SStefan Weinhuber endhead = totrk % heads; 5878e09f215SStefan Weinhuber 5888e09f215SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 589f3eb5384SStefan Weinhuber if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 590f3eb5384SStefan Weinhuber dedata->attributes.operation == DASD_SEQ_ACCESS) { 5918e09f215SStefan Weinhuber 592b44b0ab3SStefan Weinhuber if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 593b44b0ab3SStefan Weinhuber endcyl += basepriv->attrib.nr_cyl; 5948e09f215SStefan Weinhuber else 595b44b0ab3SStefan Weinhuber endcyl = (basepriv->real_cyl - 1); 5968e09f215SStefan Weinhuber } 5978e09f215SStefan Weinhuber 598f3eb5384SStefan Weinhuber set_ch_t(&dedata->beg_ext, begcyl, beghead); 599f3eb5384SStefan Weinhuber set_ch_t(&dedata->end_ext, endcyl, endhead); 600f3eb5384SStefan Weinhuber 601f3eb5384SStefan Weinhuber if (format == 1) { 602f3eb5384SStefan Weinhuber fill_LRE_data(lredata, trk, rec_on_trk, count, cmd, 603f3eb5384SStefan Weinhuber basedev, blksize, tlf); 604f3eb5384SStefan Weinhuber } 605f3eb5384SStefan Weinhuber 6068e09f215SStefan Weinhuber return rc; 6078e09f215SStefan Weinhuber } 6088e09f215SStefan Weinhuber 609f3eb5384SStefan Weinhuber static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 610f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 611f3eb5384SStefan Weinhuber struct dasd_device *basedev, struct dasd_device *startdev) 612f3eb5384SStefan Weinhuber { 613f3eb5384SStefan Weinhuber return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev, 614f3eb5384SStefan Weinhuber 0, 0, 0, 0, 0); 615f3eb5384SStefan Weinhuber } 616f3eb5384SStefan Weinhuber 6174d284cacSHeiko Carstens static void 618b44b0ab3SStefan Weinhuber locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk, 619b44b0ab3SStefan Weinhuber unsigned int rec_on_trk, int no_rec, int cmd, 6201da177e4SLinus Torvalds struct dasd_device * device, int reclen) 6211da177e4SLinus Torvalds { 6221da177e4SLinus Torvalds struct dasd_eckd_private *private; 6231da177e4SLinus Torvalds int sector; 6241da177e4SLinus Torvalds int dn, d; 6251da177e4SLinus Torvalds 6261da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 6271da177e4SLinus Torvalds 6281da177e4SLinus Torvalds DBF_DEV_EVENT(DBF_INFO, device, 6291da177e4SLinus Torvalds "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", 6301da177e4SLinus Torvalds trk, rec_on_trk, no_rec, cmd, reclen); 6311da177e4SLinus Torvalds 6321da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; 6331da177e4SLinus Torvalds ccw->flags = 0; 6341da177e4SLinus Torvalds ccw->count = 16; 6351da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 6361da177e4SLinus Torvalds 6371da177e4SLinus Torvalds memset(data, 0, sizeof(struct LO_eckd_data)); 6381da177e4SLinus Torvalds sector = 0; 6391da177e4SLinus Torvalds if (rec_on_trk) { 6401da177e4SLinus Torvalds switch (private->rdc_data.dev_type) { 6411da177e4SLinus Torvalds case 0x3390: 6421da177e4SLinus Torvalds dn = ceil_quot(reclen + 6, 232); 6431da177e4SLinus Torvalds d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 6441da177e4SLinus Torvalds sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 6451da177e4SLinus Torvalds break; 6461da177e4SLinus Torvalds case 0x3380: 6471da177e4SLinus Torvalds d = 7 + ceil_quot(reclen + 12, 32); 6481da177e4SLinus Torvalds sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 6491da177e4SLinus Torvalds break; 6501da177e4SLinus Torvalds } 6511da177e4SLinus Torvalds } 6521da177e4SLinus Torvalds data->sector = sector; 6531da177e4SLinus Torvalds data->count = no_rec; 6541da177e4SLinus Torvalds switch (cmd) { 6551da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 6561da177e4SLinus Torvalds data->operation.orientation = 0x3; 6571da177e4SLinus Torvalds data->operation.operation = 0x03; 6581da177e4SLinus Torvalds break; 6591da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 6601da177e4SLinus Torvalds data->operation.orientation = 0x3; 6611da177e4SLinus Torvalds data->operation.operation = 0x16; 6621da177e4SLinus Torvalds break; 6631da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 6641da177e4SLinus Torvalds data->operation.orientation = 0x1; 6651da177e4SLinus Torvalds data->operation.operation = 0x03; 6661da177e4SLinus Torvalds data->count++; 6671da177e4SLinus Torvalds break; 6681da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 6691da177e4SLinus Torvalds data->operation.orientation = 0x3; 6701da177e4SLinus Torvalds data->operation.operation = 0x16; 6711da177e4SLinus Torvalds data->count++; 6721da177e4SLinus Torvalds break; 6731da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 6741da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 6751da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 6761da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 6771da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6781da177e4SLinus Torvalds data->length = reclen; 6791da177e4SLinus Torvalds data->operation.operation = 0x01; 6801da177e4SLinus Torvalds break; 6811da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 6821da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 6831da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6841da177e4SLinus Torvalds data->length = reclen; 6851da177e4SLinus Torvalds data->operation.operation = 0x03; 6861da177e4SLinus Torvalds break; 6871da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 6881da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 6891da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 6901da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 6911da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6921da177e4SLinus Torvalds data->length = reclen; 6931da177e4SLinus Torvalds data->operation.operation = 0x06; 6941da177e4SLinus Torvalds break; 6951da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 6961da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 6971da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6981da177e4SLinus Torvalds data->length = reclen; 6991da177e4SLinus Torvalds data->operation.operation = 0x16; 7001da177e4SLinus Torvalds break; 7011da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_COUNT: 7021da177e4SLinus Torvalds data->operation.operation = 0x06; 7031da177e4SLinus Torvalds break; 7041da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 7051da177e4SLinus Torvalds data->length = reclen; 7061da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 7071da177e4SLinus Torvalds data->operation.operation = 0x0b; 7081da177e4SLinus Torvalds break; 7091da177e4SLinus Torvalds default: 710fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record " 711fc19f381SStefan Haberland "opcode 0x%x", cmd); 7121da177e4SLinus Torvalds } 713b44b0ab3SStefan Weinhuber set_ch_t(&data->seek_addr, 714b44b0ab3SStefan Weinhuber trk / private->rdc_data.trk_per_cyl, 715b44b0ab3SStefan Weinhuber trk % private->rdc_data.trk_per_cyl); 716b44b0ab3SStefan Weinhuber data->search_arg.cyl = data->seek_addr.cyl; 717b44b0ab3SStefan Weinhuber data->search_arg.head = data->seek_addr.head; 7181da177e4SLinus Torvalds data->search_arg.record = rec_on_trk; 7191da177e4SLinus Torvalds } 7201da177e4SLinus Torvalds 7211da177e4SLinus Torvalds /* 7221da177e4SLinus Torvalds * Returns 1 if the block is one of the special blocks that needs 7231da177e4SLinus Torvalds * to get read/written with the KD variant of the command. 7241da177e4SLinus Torvalds * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and 7251da177e4SLinus Torvalds * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. 7261da177e4SLinus Torvalds * Luckily the KD variants differ only by one bit (0x08) from the 7271da177e4SLinus Torvalds * normal variant. So don't wonder about code like: 7281da177e4SLinus Torvalds * if (dasd_eckd_cdl_special(blk_per_trk, recid)) 7291da177e4SLinus Torvalds * ccw->cmd_code |= 0x8; 7301da177e4SLinus Torvalds */ 7311da177e4SLinus Torvalds static inline int 7321da177e4SLinus Torvalds dasd_eckd_cdl_special(int blk_per_trk, int recid) 7331da177e4SLinus Torvalds { 7341da177e4SLinus Torvalds if (recid < 3) 7351da177e4SLinus Torvalds return 1; 7361da177e4SLinus Torvalds if (recid < blk_per_trk) 7371da177e4SLinus Torvalds return 0; 7381da177e4SLinus Torvalds if (recid < 2 * blk_per_trk) 7391da177e4SLinus Torvalds return 1; 7401da177e4SLinus Torvalds return 0; 7411da177e4SLinus Torvalds } 7421da177e4SLinus Torvalds 7431da177e4SLinus Torvalds /* 7441da177e4SLinus Torvalds * Returns the record size for the special blocks of the cdl format. 7451da177e4SLinus Torvalds * Only returns something useful if dasd_eckd_cdl_special is true 7461da177e4SLinus Torvalds * for the recid. 7471da177e4SLinus Torvalds */ 7481da177e4SLinus Torvalds static inline int 7491da177e4SLinus Torvalds dasd_eckd_cdl_reclen(int recid) 7501da177e4SLinus Torvalds { 7511da177e4SLinus Torvalds if (recid < 3) 7521da177e4SLinus Torvalds return sizes_trk0[recid]; 7531da177e4SLinus Torvalds return LABEL_SIZE; 7541da177e4SLinus Torvalds } 7551da177e4SLinus Torvalds 7563d052595SHorst Hummel /* 7573d052595SHorst Hummel * Generate device unique id that specifies the physical device. 7583d052595SHorst Hummel */ 7592dedf0d9SStefan Haberland static int dasd_eckd_generate_uid(struct dasd_device *device) 7603d052595SHorst Hummel { 7613d052595SHorst Hummel struct dasd_eckd_private *private; 7622dedf0d9SStefan Haberland struct dasd_uid *uid; 7634abb08c2SStefan Weinhuber int count; 7642dedf0d9SStefan Haberland unsigned long flags; 7653d052595SHorst Hummel 7663d052595SHorst Hummel private = (struct dasd_eckd_private *) device->private; 7673d052595SHorst Hummel if (!private) 7683d052595SHorst Hummel return -ENODEV; 7694abb08c2SStefan Weinhuber if (!private->ned || !private->gneq) 7703d052595SHorst Hummel return -ENODEV; 7712dedf0d9SStefan Haberland uid = &private->uid; 7722dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 7733d052595SHorst Hummel memset(uid, 0, sizeof(struct dasd_uid)); 7744abb08c2SStefan Weinhuber memcpy(uid->vendor, private->ned->HDA_manufacturer, 7753d052595SHorst Hummel sizeof(uid->vendor) - 1); 7763d052595SHorst Hummel EBCASC(uid->vendor, sizeof(uid->vendor) - 1); 7774abb08c2SStefan Weinhuber memcpy(uid->serial, private->ned->HDA_location, 7783d052595SHorst Hummel sizeof(uid->serial) - 1); 7793d052595SHorst Hummel EBCASC(uid->serial, sizeof(uid->serial) - 1); 7804abb08c2SStefan Weinhuber uid->ssid = private->gneq->subsystemID; 781a419aef8SJoe Perches uid->real_unit_addr = private->ned->unit_addr; 7824abb08c2SStefan Weinhuber if (private->sneq) { 7834abb08c2SStefan Weinhuber uid->type = private->sneq->sua_flags; 7848e09f215SStefan Weinhuber if (uid->type == UA_BASE_PAV_ALIAS) 7854abb08c2SStefan Weinhuber uid->base_unit_addr = private->sneq->base_unit_addr; 7868e09f215SStefan Weinhuber } else { 7878e09f215SStefan Weinhuber uid->type = UA_BASE_DEVICE; 7888e09f215SStefan Weinhuber } 7894abb08c2SStefan Weinhuber if (private->vdsneq) { 7904abb08c2SStefan Weinhuber for (count = 0; count < 16; count++) { 7914abb08c2SStefan Weinhuber sprintf(uid->vduit+2*count, "%02x", 7924abb08c2SStefan Weinhuber private->vdsneq->uit[count]); 7934abb08c2SStefan Weinhuber } 7944abb08c2SStefan Weinhuber } 7952dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 7963d052595SHorst Hummel return 0; 7973d052595SHorst Hummel } 7983d052595SHorst Hummel 7992dedf0d9SStefan Haberland static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid) 8002dedf0d9SStefan Haberland { 8012dedf0d9SStefan Haberland struct dasd_eckd_private *private; 8022dedf0d9SStefan Haberland unsigned long flags; 8032dedf0d9SStefan Haberland 8042dedf0d9SStefan Haberland if (device->private) { 8052dedf0d9SStefan Haberland private = (struct dasd_eckd_private *)device->private; 8062dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 8072dedf0d9SStefan Haberland *uid = private->uid; 8082dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 8092dedf0d9SStefan Haberland return 0; 8102dedf0d9SStefan Haberland } 8112dedf0d9SStefan Haberland return -EINVAL; 8122dedf0d9SStefan Haberland } 8132dedf0d9SStefan Haberland 814a4d26c6aSStefan Weinhuber static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device, 815a4d26c6aSStefan Weinhuber struct dasd_ccw_req *cqr, 816a4d26c6aSStefan Weinhuber __u8 *rcd_buffer, 817a4d26c6aSStefan Weinhuber __u8 lpm) 81817283b56SCornelia Huck { 81917283b56SCornelia Huck struct ccw1 *ccw; 820a4d26c6aSStefan Weinhuber /* 821a4d26c6aSStefan Weinhuber * buffer has to start with EBCDIC "V1.0" to show 822a4d26c6aSStefan Weinhuber * support for virtual device SNEQ 823a4d26c6aSStefan Weinhuber */ 824a4d26c6aSStefan Weinhuber rcd_buffer[0] = 0xE5; 825a4d26c6aSStefan Weinhuber rcd_buffer[1] = 0xF1; 826a4d26c6aSStefan Weinhuber rcd_buffer[2] = 0x4B; 827a4d26c6aSStefan Weinhuber rcd_buffer[3] = 0xF0; 82817283b56SCornelia Huck 82917283b56SCornelia Huck ccw = cqr->cpaddr; 830a4d26c6aSStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RCD; 831a4d26c6aSStefan Weinhuber ccw->flags = 0; 83217283b56SCornelia Huck ccw->cda = (__u32)(addr_t)rcd_buffer; 833a4d26c6aSStefan Weinhuber ccw->count = DASD_ECKD_RCD_DATA_SIZE; 834a4d26c6aSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 83517283b56SCornelia Huck 8368e09f215SStefan Weinhuber cqr->startdev = device; 8378e09f215SStefan Weinhuber cqr->memdev = device; 8388e09f215SStefan Weinhuber cqr->block = NULL; 83917283b56SCornelia Huck cqr->expires = 10*HZ; 84017283b56SCornelia Huck cqr->lpm = lpm; 841eb6e199bSStefan Weinhuber cqr->retries = 256; 84217283b56SCornelia Huck cqr->buildclk = get_clock(); 84317283b56SCornelia Huck cqr->status = DASD_CQR_FILLED; 844a4d26c6aSStefan Weinhuber set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 845a4d26c6aSStefan Weinhuber } 846a4d26c6aSStefan Weinhuber 847a4d26c6aSStefan Weinhuber static int dasd_eckd_read_conf_immediately(struct dasd_device *device, 848a4d26c6aSStefan Weinhuber struct dasd_ccw_req *cqr, 849a4d26c6aSStefan Weinhuber __u8 *rcd_buffer, 850a4d26c6aSStefan Weinhuber __u8 lpm) 851a4d26c6aSStefan Weinhuber { 852a4d26c6aSStefan Weinhuber struct ciw *ciw; 853a4d26c6aSStefan Weinhuber int rc; 854a4d26c6aSStefan Weinhuber /* 855a4d26c6aSStefan Weinhuber * sanity check: scan for RCD command in extended SenseID data 856a4d26c6aSStefan Weinhuber * some devices do not support RCD 857a4d26c6aSStefan Weinhuber */ 858a4d26c6aSStefan Weinhuber ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 859a4d26c6aSStefan Weinhuber if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) 860a4d26c6aSStefan Weinhuber return -EOPNOTSUPP; 861a4d26c6aSStefan Weinhuber 862a4d26c6aSStefan Weinhuber dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm); 863a4d26c6aSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 8645a27e60dSStefan Weinhuber set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 865a4d26c6aSStefan Weinhuber cqr->retries = 5; 866a4d26c6aSStefan Weinhuber rc = dasd_sleep_on_immediatly(cqr); 867a4d26c6aSStefan Weinhuber return rc; 86817283b56SCornelia Huck } 86917283b56SCornelia Huck 87017283b56SCornelia Huck static int dasd_eckd_read_conf_lpm(struct dasd_device *device, 87117283b56SCornelia Huck void **rcd_buffer, 87217283b56SCornelia Huck int *rcd_buffer_size, __u8 lpm) 87317283b56SCornelia Huck { 87417283b56SCornelia Huck struct ciw *ciw; 87517283b56SCornelia Huck char *rcd_buf = NULL; 87617283b56SCornelia Huck int ret; 87717283b56SCornelia Huck struct dasd_ccw_req *cqr; 87817283b56SCornelia Huck 87917283b56SCornelia Huck /* 880a4d26c6aSStefan Weinhuber * sanity check: scan for RCD command in extended SenseID data 881a4d26c6aSStefan Weinhuber * some devices do not support RCD 88217283b56SCornelia Huck */ 88317283b56SCornelia Huck ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 884a4d26c6aSStefan Weinhuber if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) { 88517283b56SCornelia Huck ret = -EOPNOTSUPP; 88617283b56SCornelia Huck goto out_error; 88717283b56SCornelia Huck } 888a4d26c6aSStefan Weinhuber rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA); 88917283b56SCornelia Huck if (!rcd_buf) { 89017283b56SCornelia Huck ret = -ENOMEM; 89117283b56SCornelia Huck goto out_error; 89217283b56SCornelia Huck } 893a4d26c6aSStefan Weinhuber cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, 894a4d26c6aSStefan Weinhuber 0, /* use rcd_buf as data ara */ 895a4d26c6aSStefan Weinhuber device); 89617283b56SCornelia Huck if (IS_ERR(cqr)) { 897a4d26c6aSStefan Weinhuber DBF_DEV_EVENT(DBF_WARNING, device, "%s", 898a4d26c6aSStefan Weinhuber "Could not allocate RCD request"); 899a4d26c6aSStefan Weinhuber ret = -ENOMEM; 90017283b56SCornelia Huck goto out_error; 90117283b56SCornelia Huck } 902a4d26c6aSStefan Weinhuber dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm); 90317283b56SCornelia Huck ret = dasd_sleep_on(cqr); 90417283b56SCornelia Huck /* 90517283b56SCornelia Huck * on success we update the user input parms 90617283b56SCornelia Huck */ 9078e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 90817283b56SCornelia Huck if (ret) 90917283b56SCornelia Huck goto out_error; 91017283b56SCornelia Huck 911a4d26c6aSStefan Weinhuber *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE; 91217283b56SCornelia Huck *rcd_buffer = rcd_buf; 91317283b56SCornelia Huck return 0; 91417283b56SCornelia Huck out_error: 91517283b56SCornelia Huck kfree(rcd_buf); 91617283b56SCornelia Huck *rcd_buffer = NULL; 91717283b56SCornelia Huck *rcd_buffer_size = 0; 91817283b56SCornelia Huck return ret; 91917283b56SCornelia Huck } 92017283b56SCornelia Huck 9214abb08c2SStefan Weinhuber static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private) 9224abb08c2SStefan Weinhuber { 9234abb08c2SStefan Weinhuber 9244abb08c2SStefan Weinhuber struct dasd_sneq *sneq; 9254abb08c2SStefan Weinhuber int i, count; 9264abb08c2SStefan Weinhuber 9274abb08c2SStefan Weinhuber private->ned = NULL; 9284abb08c2SStefan Weinhuber private->sneq = NULL; 9294abb08c2SStefan Weinhuber private->vdsneq = NULL; 9304abb08c2SStefan Weinhuber private->gneq = NULL; 9314abb08c2SStefan Weinhuber count = private->conf_len / sizeof(struct dasd_sneq); 9324abb08c2SStefan Weinhuber sneq = (struct dasd_sneq *)private->conf_data; 9334abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 9344abb08c2SStefan Weinhuber if (sneq->flags.identifier == 1 && sneq->format == 1) 9354abb08c2SStefan Weinhuber private->sneq = sneq; 9364abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 1 && sneq->format == 4) 9374abb08c2SStefan Weinhuber private->vdsneq = (struct vd_sneq *)sneq; 9384abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 2) 9394abb08c2SStefan Weinhuber private->gneq = (struct dasd_gneq *)sneq; 9404abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 3 && sneq->res1 == 1) 9414abb08c2SStefan Weinhuber private->ned = (struct dasd_ned *)sneq; 9424abb08c2SStefan Weinhuber sneq++; 9434abb08c2SStefan Weinhuber } 9444abb08c2SStefan Weinhuber if (!private->ned || !private->gneq) { 9454abb08c2SStefan Weinhuber private->ned = NULL; 9464abb08c2SStefan Weinhuber private->sneq = NULL; 9474abb08c2SStefan Weinhuber private->vdsneq = NULL; 9484abb08c2SStefan Weinhuber private->gneq = NULL; 9494abb08c2SStefan Weinhuber return -EINVAL; 9504abb08c2SStefan Weinhuber } 9514abb08c2SStefan Weinhuber return 0; 9524abb08c2SStefan Weinhuber 9534abb08c2SStefan Weinhuber }; 9544abb08c2SStefan Weinhuber 9554abb08c2SStefan Weinhuber static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len) 9564abb08c2SStefan Weinhuber { 9574abb08c2SStefan Weinhuber struct dasd_gneq *gneq; 9584abb08c2SStefan Weinhuber int i, count, found; 9594abb08c2SStefan Weinhuber 9604abb08c2SStefan Weinhuber count = conf_len / sizeof(*gneq); 9614abb08c2SStefan Weinhuber gneq = (struct dasd_gneq *)conf_data; 9624abb08c2SStefan Weinhuber found = 0; 9634abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 9644abb08c2SStefan Weinhuber if (gneq->flags.identifier == 2) { 9654abb08c2SStefan Weinhuber found = 1; 9664abb08c2SStefan Weinhuber break; 9674abb08c2SStefan Weinhuber } 9684abb08c2SStefan Weinhuber gneq++; 9694abb08c2SStefan Weinhuber } 9704abb08c2SStefan Weinhuber if (found) 9714abb08c2SStefan Weinhuber return ((char *)gneq)[18] & 0x07; 9724abb08c2SStefan Weinhuber else 9734abb08c2SStefan Weinhuber return 0; 9744abb08c2SStefan Weinhuber } 9754abb08c2SStefan Weinhuber 9764abb08c2SStefan Weinhuber static int dasd_eckd_read_conf(struct dasd_device *device) 9771da177e4SLinus Torvalds { 9781da177e4SLinus Torvalds void *conf_data; 9791da177e4SLinus Torvalds int conf_len, conf_data_saved; 9801da177e4SLinus Torvalds int rc; 981a4d26c6aSStefan Weinhuber __u8 lpm, opm; 9821da177e4SLinus Torvalds struct dasd_eckd_private *private; 983a4d26c6aSStefan Weinhuber struct dasd_path *path_data; 9841da177e4SLinus Torvalds 9851da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 986a4d26c6aSStefan Weinhuber path_data = &device->path_data; 987a4d26c6aSStefan Weinhuber opm = ccw_device_get_path_mask(device->cdev); 9881da177e4SLinus Torvalds lpm = 0x80; 9891da177e4SLinus Torvalds conf_data_saved = 0; 9901da177e4SLinus Torvalds /* get configuration data per operational path */ 9911da177e4SLinus Torvalds for (lpm = 0x80; lpm; lpm>>= 1) { 992a4d26c6aSStefan Weinhuber if (lpm & opm) { 99317283b56SCornelia Huck rc = dasd_eckd_read_conf_lpm(device, &conf_data, 9941da177e4SLinus Torvalds &conf_len, lpm); 9951da177e4SLinus Torvalds if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ 996b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 9971da177e4SLinus Torvalds "Read configuration data returned " 998b8ed5dd5SStefan Haberland "error %d", rc); 9991da177e4SLinus Torvalds return rc; 10001da177e4SLinus Torvalds } 10011da177e4SLinus Torvalds if (conf_data == NULL) { 1002b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1003b8ed5dd5SStefan Haberland "No configuration data " 1004b8ed5dd5SStefan Haberland "retrieved"); 1005a4d26c6aSStefan Weinhuber /* no further analysis possible */ 1006a4d26c6aSStefan Weinhuber path_data->opm |= lpm; 1007d133a960SGabriel Craciunescu continue; /* no error */ 10081da177e4SLinus Torvalds } 10091da177e4SLinus Torvalds /* save first valid configuration data */ 10101da177e4SLinus Torvalds if (!conf_data_saved) { 10114abb08c2SStefan Weinhuber kfree(private->conf_data); 10124abb08c2SStefan Weinhuber private->conf_data = conf_data; 10134abb08c2SStefan Weinhuber private->conf_len = conf_len; 10144abb08c2SStefan Weinhuber if (dasd_eckd_identify_conf_parts(private)) { 10154abb08c2SStefan Weinhuber private->conf_data = NULL; 10164abb08c2SStefan Weinhuber private->conf_len = 0; 10174abb08c2SStefan Weinhuber kfree(conf_data); 10184abb08c2SStefan Weinhuber continue; 10194abb08c2SStefan Weinhuber } 10201da177e4SLinus Torvalds conf_data_saved++; 10211da177e4SLinus Torvalds } 10224abb08c2SStefan Weinhuber switch (dasd_eckd_path_access(conf_data, conf_len)) { 10231da177e4SLinus Torvalds case 0x02: 10241da177e4SLinus Torvalds path_data->npm |= lpm; 10251da177e4SLinus Torvalds break; 10261da177e4SLinus Torvalds case 0x03: 10271da177e4SLinus Torvalds path_data->ppm |= lpm; 10281da177e4SLinus Torvalds break; 10291da177e4SLinus Torvalds } 1030a4d26c6aSStefan Weinhuber path_data->opm |= lpm; 10314abb08c2SStefan Weinhuber if (conf_data != private->conf_data) 10321da177e4SLinus Torvalds kfree(conf_data); 10331da177e4SLinus Torvalds } 10341da177e4SLinus Torvalds } 10351da177e4SLinus Torvalds return 0; 10361da177e4SLinus Torvalds } 10371da177e4SLinus Torvalds 1038a4d26c6aSStefan Weinhuber static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm) 1039a4d26c6aSStefan Weinhuber { 1040a4d26c6aSStefan Weinhuber struct dasd_eckd_private *private; 1041a4d26c6aSStefan Weinhuber int mdc; 1042a4d26c6aSStefan Weinhuber u32 fcx_max_data; 1043a4d26c6aSStefan Weinhuber 1044a4d26c6aSStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 1045a4d26c6aSStefan Weinhuber if (private->fcx_max_data) { 1046a4d26c6aSStefan Weinhuber mdc = ccw_device_get_mdc(device->cdev, lpm); 1047a4d26c6aSStefan Weinhuber if ((mdc < 0)) { 1048a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1049a4d26c6aSStefan Weinhuber "Detecting the maximum data size for zHPF " 1050a4d26c6aSStefan Weinhuber "requests failed (rc=%d) for a new path %x\n", 1051a4d26c6aSStefan Weinhuber mdc, lpm); 1052a4d26c6aSStefan Weinhuber return mdc; 1053a4d26c6aSStefan Weinhuber } 1054a4d26c6aSStefan Weinhuber fcx_max_data = mdc * FCX_MAX_DATA_FACTOR; 1055a4d26c6aSStefan Weinhuber if (fcx_max_data < private->fcx_max_data) { 1056a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1057a4d26c6aSStefan Weinhuber "The maximum data size for zHPF requests %u " 1058a4d26c6aSStefan Weinhuber "on a new path %x is below the active maximum " 1059a4d26c6aSStefan Weinhuber "%u\n", fcx_max_data, lpm, 1060a4d26c6aSStefan Weinhuber private->fcx_max_data); 1061a4d26c6aSStefan Weinhuber return -EACCES; 1062a4d26c6aSStefan Weinhuber } 1063a4d26c6aSStefan Weinhuber } 1064a4d26c6aSStefan Weinhuber return 0; 1065a4d26c6aSStefan Weinhuber } 1066a4d26c6aSStefan Weinhuber 1067a4d26c6aSStefan Weinhuber static void do_path_verification_work(struct work_struct *work) 1068a4d26c6aSStefan Weinhuber { 1069a4d26c6aSStefan Weinhuber struct path_verification_work_data *data; 1070a4d26c6aSStefan Weinhuber struct dasd_device *device; 1071a4d26c6aSStefan Weinhuber __u8 lpm, opm, npm, ppm, epm; 1072a4d26c6aSStefan Weinhuber unsigned long flags; 1073a4d26c6aSStefan Weinhuber int rc; 1074a4d26c6aSStefan Weinhuber 1075a4d26c6aSStefan Weinhuber data = container_of(work, struct path_verification_work_data, worker); 1076a4d26c6aSStefan Weinhuber device = data->device; 1077a4d26c6aSStefan Weinhuber 1078a4d26c6aSStefan Weinhuber opm = 0; 1079a4d26c6aSStefan Weinhuber npm = 0; 1080a4d26c6aSStefan Weinhuber ppm = 0; 1081a4d26c6aSStefan Weinhuber epm = 0; 1082a4d26c6aSStefan Weinhuber for (lpm = 0x80; lpm; lpm >>= 1) { 1083a4d26c6aSStefan Weinhuber if (lpm & data->tbvpm) { 1084a4d26c6aSStefan Weinhuber memset(data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1085a4d26c6aSStefan Weinhuber memset(&data->cqr, 0, sizeof(data->cqr)); 1086a4d26c6aSStefan Weinhuber data->cqr.cpaddr = &data->ccw; 1087a4d26c6aSStefan Weinhuber rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1088a4d26c6aSStefan Weinhuber data->rcd_buffer, 1089a4d26c6aSStefan Weinhuber lpm); 1090a4d26c6aSStefan Weinhuber if (!rc) { 1091a4d26c6aSStefan Weinhuber switch (dasd_eckd_path_access(data->rcd_buffer, 1092a4d26c6aSStefan Weinhuber DASD_ECKD_RCD_DATA_SIZE)) { 1093a4d26c6aSStefan Weinhuber case 0x02: 1094a4d26c6aSStefan Weinhuber npm |= lpm; 1095a4d26c6aSStefan Weinhuber break; 1096a4d26c6aSStefan Weinhuber case 0x03: 1097a4d26c6aSStefan Weinhuber ppm |= lpm; 1098a4d26c6aSStefan Weinhuber break; 1099a4d26c6aSStefan Weinhuber } 1100a4d26c6aSStefan Weinhuber opm |= lpm; 1101a4d26c6aSStefan Weinhuber } else if (rc == -EOPNOTSUPP) { 1102a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1103a4d26c6aSStefan Weinhuber "path verification: No configuration " 1104a4d26c6aSStefan Weinhuber "data retrieved"); 1105a4d26c6aSStefan Weinhuber opm |= lpm; 1106a4d26c6aSStefan Weinhuber } else if (rc == -EAGAIN) { 1107a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1108a4d26c6aSStefan Weinhuber "path verification: device is stopped," 1109a4d26c6aSStefan Weinhuber " try again later"); 1110a4d26c6aSStefan Weinhuber epm |= lpm; 1111a4d26c6aSStefan Weinhuber } else { 1112a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1113a4d26c6aSStefan Weinhuber "Reading device feature codes failed " 1114a4d26c6aSStefan Weinhuber "(rc=%d) for new path %x\n", rc, lpm); 1115a4d26c6aSStefan Weinhuber continue; 1116a4d26c6aSStefan Weinhuber } 1117a4d26c6aSStefan Weinhuber if (verify_fcx_max_data(device, lpm)) { 1118a4d26c6aSStefan Weinhuber opm &= ~lpm; 1119a4d26c6aSStefan Weinhuber npm &= ~lpm; 1120a4d26c6aSStefan Weinhuber ppm &= ~lpm; 1121a4d26c6aSStefan Weinhuber } 1122a4d26c6aSStefan Weinhuber } 1123a4d26c6aSStefan Weinhuber } 1124a4d26c6aSStefan Weinhuber /* 1125a4d26c6aSStefan Weinhuber * There is a small chance that a path is lost again between 1126a4d26c6aSStefan Weinhuber * above path verification and the following modification of 1127a4d26c6aSStefan Weinhuber * the device opm mask. We could avoid that race here by using 1128a4d26c6aSStefan Weinhuber * yet another path mask, but we rather deal with this unlikely 1129a4d26c6aSStefan Weinhuber * situation in dasd_start_IO. 1130a4d26c6aSStefan Weinhuber */ 1131a4d26c6aSStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1132a4d26c6aSStefan Weinhuber if (!device->path_data.opm && opm) { 1133a4d26c6aSStefan Weinhuber device->path_data.opm = opm; 1134a4d26c6aSStefan Weinhuber dasd_generic_path_operational(device); 1135a4d26c6aSStefan Weinhuber } else 1136a4d26c6aSStefan Weinhuber device->path_data.opm |= opm; 1137a4d26c6aSStefan Weinhuber device->path_data.npm |= npm; 1138a4d26c6aSStefan Weinhuber device->path_data.ppm |= ppm; 1139a4d26c6aSStefan Weinhuber device->path_data.tbvpm |= epm; 1140a4d26c6aSStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1141a4d26c6aSStefan Weinhuber 1142a4d26c6aSStefan Weinhuber dasd_put_device(device); 1143a4d26c6aSStefan Weinhuber if (data->isglobal) 1144a4d26c6aSStefan Weinhuber mutex_unlock(&dasd_path_verification_mutex); 1145a4d26c6aSStefan Weinhuber else 1146a4d26c6aSStefan Weinhuber kfree(data); 1147a4d26c6aSStefan Weinhuber } 1148a4d26c6aSStefan Weinhuber 1149a4d26c6aSStefan Weinhuber static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm) 1150a4d26c6aSStefan Weinhuber { 1151a4d26c6aSStefan Weinhuber struct path_verification_work_data *data; 1152a4d26c6aSStefan Weinhuber 1153a4d26c6aSStefan Weinhuber data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA); 1154a4d26c6aSStefan Weinhuber if (!data) { 1155a4d26c6aSStefan Weinhuber if (mutex_trylock(&dasd_path_verification_mutex)) { 1156a4d26c6aSStefan Weinhuber data = path_verification_worker; 1157a4d26c6aSStefan Weinhuber data->isglobal = 1; 1158a4d26c6aSStefan Weinhuber } else 1159a4d26c6aSStefan Weinhuber return -ENOMEM; 1160a4d26c6aSStefan Weinhuber } else { 1161a4d26c6aSStefan Weinhuber memset(data, 0, sizeof(*data)); 1162a4d26c6aSStefan Weinhuber data->isglobal = 0; 1163a4d26c6aSStefan Weinhuber } 1164a4d26c6aSStefan Weinhuber INIT_WORK(&data->worker, do_path_verification_work); 1165a4d26c6aSStefan Weinhuber dasd_get_device(device); 1166a4d26c6aSStefan Weinhuber data->device = device; 1167a4d26c6aSStefan Weinhuber data->tbvpm = lpm; 1168a4d26c6aSStefan Weinhuber schedule_work(&data->worker); 1169a4d26c6aSStefan Weinhuber return 0; 1170a4d26c6aSStefan Weinhuber } 1171a4d26c6aSStefan Weinhuber 11728e09f215SStefan Weinhuber static int dasd_eckd_read_features(struct dasd_device *device) 11738e09f215SStefan Weinhuber { 11748e09f215SStefan Weinhuber struct dasd_psf_prssd_data *prssdp; 11758e09f215SStefan Weinhuber struct dasd_rssd_features *features; 11768e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 11778e09f215SStefan Weinhuber struct ccw1 *ccw; 11788e09f215SStefan Weinhuber int rc; 11798e09f215SStefan Weinhuber struct dasd_eckd_private *private; 11808e09f215SStefan Weinhuber 11818e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 118268d1e5f0SStefan Weinhuber memset(&private->features, 0, sizeof(struct dasd_rssd_features)); 118368b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 11848e09f215SStefan Weinhuber (sizeof(struct dasd_psf_prssd_data) + 11858e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)), 11868e09f215SStefan Weinhuber device); 11878e09f215SStefan Weinhuber if (IS_ERR(cqr)) { 1188b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " 1189b8ed5dd5SStefan Haberland "allocate initialization request"); 11908e09f215SStefan Weinhuber return PTR_ERR(cqr); 11918e09f215SStefan Weinhuber } 11928e09f215SStefan Weinhuber cqr->startdev = device; 11938e09f215SStefan Weinhuber cqr->memdev = device; 11948e09f215SStefan Weinhuber cqr->block = NULL; 1195eb6e199bSStefan Weinhuber cqr->retries = 256; 11968e09f215SStefan Weinhuber cqr->expires = 10 * HZ; 11978e09f215SStefan Weinhuber 11988e09f215SStefan Weinhuber /* Prepare for Read Subsystem Data */ 11998e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 12008e09f215SStefan Weinhuber memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 12018e09f215SStefan Weinhuber prssdp->order = PSF_ORDER_PRSSD; 12028e09f215SStefan Weinhuber prssdp->suborder = 0x41; /* Read Feature Codes */ 12038e09f215SStefan Weinhuber /* all other bytes of prssdp must be zero */ 12048e09f215SStefan Weinhuber 12058e09f215SStefan Weinhuber ccw = cqr->cpaddr; 12068e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PSF; 12078e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_psf_prssd_data); 12088e09f215SStefan Weinhuber ccw->flags |= CCW_FLAG_CC; 12098e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) prssdp; 12108e09f215SStefan Weinhuber 12118e09f215SStefan Weinhuber /* Read Subsystem Data - feature codes */ 12128e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 12138e09f215SStefan Weinhuber memset(features, 0, sizeof(struct dasd_rssd_features)); 12148e09f215SStefan Weinhuber 12158e09f215SStefan Weinhuber ccw++; 12168e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RSSD; 12178e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_rssd_features); 12188e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) features; 12198e09f215SStefan Weinhuber 12208e09f215SStefan Weinhuber cqr->buildclk = get_clock(); 12218e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 12228e09f215SStefan Weinhuber rc = dasd_sleep_on(cqr); 12238e09f215SStefan Weinhuber if (rc == 0) { 12248e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 12258e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 12268e09f215SStefan Weinhuber memcpy(&private->features, features, 12278e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)); 122868d1e5f0SStefan Weinhuber } else 122968d1e5f0SStefan Weinhuber dev_warn(&device->cdev->dev, "Reading device feature codes" 123068d1e5f0SStefan Weinhuber " failed with rc=%d\n", rc); 12318e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 12328e09f215SStefan Weinhuber return rc; 12338e09f215SStefan Weinhuber } 12348e09f215SStefan Weinhuber 12358e09f215SStefan Weinhuber 12363d052595SHorst Hummel /* 123740545573SHorst Hummel * Build CP for Perform Subsystem Function - SSC. 123840545573SHorst Hummel */ 1239f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, 1240f3eb5384SStefan Weinhuber int enable_pav) 124140545573SHorst Hummel { 124240545573SHorst Hummel struct dasd_ccw_req *cqr; 124340545573SHorst Hummel struct dasd_psf_ssc_data *psf_ssc_data; 124440545573SHorst Hummel struct ccw1 *ccw; 124540545573SHorst Hummel 124668b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 124740545573SHorst Hummel sizeof(struct dasd_psf_ssc_data), 124840545573SHorst Hummel device); 124940545573SHorst Hummel 125040545573SHorst Hummel if (IS_ERR(cqr)) { 1251fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 125240545573SHorst Hummel "Could not allocate PSF-SSC request"); 125340545573SHorst Hummel return cqr; 125440545573SHorst Hummel } 125540545573SHorst Hummel psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 125640545573SHorst Hummel psf_ssc_data->order = PSF_ORDER_SSC; 1257626350b6SStefan Weinhuber psf_ssc_data->suborder = 0xc0; 1258f3eb5384SStefan Weinhuber if (enable_pav) { 1259626350b6SStefan Weinhuber psf_ssc_data->suborder |= 0x08; 12608e09f215SStefan Weinhuber psf_ssc_data->reserved[0] = 0x88; 1261f3eb5384SStefan Weinhuber } 126240545573SHorst Hummel ccw = cqr->cpaddr; 126340545573SHorst Hummel ccw->cmd_code = DASD_ECKD_CCW_PSF; 126440545573SHorst Hummel ccw->cda = (__u32)(addr_t)psf_ssc_data; 126540545573SHorst Hummel ccw->count = 66; 126640545573SHorst Hummel 12678e09f215SStefan Weinhuber cqr->startdev = device; 12688e09f215SStefan Weinhuber cqr->memdev = device; 12698e09f215SStefan Weinhuber cqr->block = NULL; 1270eb6e199bSStefan Weinhuber cqr->retries = 256; 127140545573SHorst Hummel cqr->expires = 10*HZ; 127240545573SHorst Hummel cqr->buildclk = get_clock(); 127340545573SHorst Hummel cqr->status = DASD_CQR_FILLED; 127440545573SHorst Hummel return cqr; 127540545573SHorst Hummel } 127640545573SHorst Hummel 127740545573SHorst Hummel /* 127840545573SHorst Hummel * Perform Subsystem Function. 127940545573SHorst Hummel * It is necessary to trigger CIO for channel revalidation since this 128040545573SHorst Hummel * call might change behaviour of DASD devices. 128140545573SHorst Hummel */ 128240545573SHorst Hummel static int 1283f3eb5384SStefan Weinhuber dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav) 128440545573SHorst Hummel { 128540545573SHorst Hummel struct dasd_ccw_req *cqr; 128640545573SHorst Hummel int rc; 128740545573SHorst Hummel 1288f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_psf_ssc(device, enable_pav); 128940545573SHorst Hummel if (IS_ERR(cqr)) 129040545573SHorst Hummel return PTR_ERR(cqr); 129140545573SHorst Hummel 129240545573SHorst Hummel rc = dasd_sleep_on(cqr); 129340545573SHorst Hummel if (!rc) 129440545573SHorst Hummel /* trigger CIO to reprobe devices */ 129540545573SHorst Hummel css_schedule_reprobe(); 12968e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 129740545573SHorst Hummel return rc; 129840545573SHorst Hummel } 129940545573SHorst Hummel 130040545573SHorst Hummel /* 130140545573SHorst Hummel * Valide storage server of current device. 130240545573SHorst Hummel */ 1303f4ac1d02SStefan Weinhuber static void dasd_eckd_validate_server(struct dasd_device *device) 130440545573SHorst Hummel { 130540545573SHorst Hummel int rc; 13068e09f215SStefan Weinhuber struct dasd_eckd_private *private; 1307f3eb5384SStefan Weinhuber int enable_pav; 130840545573SHorst Hummel 130940545573SHorst Hummel if (dasd_nopav || MACHINE_IS_VM) 1310f3eb5384SStefan Weinhuber enable_pav = 0; 1311f3eb5384SStefan Weinhuber else 1312f3eb5384SStefan Weinhuber enable_pav = 1; 1313f3eb5384SStefan Weinhuber rc = dasd_eckd_psf_ssc(device, enable_pav); 1314eb6e199bSStefan Weinhuber 131540545573SHorst Hummel /* may be requested feature is not available on server, 131640545573SHorst Hummel * therefore just report error and go ahead */ 13178e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 1318b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " 1319b8ed5dd5SStefan Haberland "returned rc=%d", private->uid.ssid, rc); 132040545573SHorst Hummel } 132140545573SHorst Hummel 1322ef19298bSStefan Weinhuber static u32 get_fcx_max_data(struct dasd_device *device) 1323ef19298bSStefan Weinhuber { 1324ef19298bSStefan Weinhuber #if defined(CONFIG_64BIT) 1325ef19298bSStefan Weinhuber int tpm, mdc; 1326ef19298bSStefan Weinhuber int fcx_in_css, fcx_in_gneq, fcx_in_features; 1327ef19298bSStefan Weinhuber struct dasd_eckd_private *private; 1328ef19298bSStefan Weinhuber 1329ef19298bSStefan Weinhuber if (dasd_nofcx) 1330ef19298bSStefan Weinhuber return 0; 1331ef19298bSStefan Weinhuber /* is transport mode supported? */ 1332ef19298bSStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 1333ef19298bSStefan Weinhuber fcx_in_css = css_general_characteristics.fcx; 1334ef19298bSStefan Weinhuber fcx_in_gneq = private->gneq->reserved2[7] & 0x04; 1335ef19298bSStefan Weinhuber fcx_in_features = private->features.feature[40] & 0x80; 1336ef19298bSStefan Weinhuber tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; 1337ef19298bSStefan Weinhuber 1338ef19298bSStefan Weinhuber if (!tpm) 1339ef19298bSStefan Weinhuber return 0; 1340ef19298bSStefan Weinhuber 1341ef19298bSStefan Weinhuber mdc = ccw_device_get_mdc(device->cdev, 0); 1342ef19298bSStefan Weinhuber if (mdc < 0) { 1343ef19298bSStefan Weinhuber dev_warn(&device->cdev->dev, "Detecting the maximum supported" 1344ef19298bSStefan Weinhuber " data size for zHPF requests failed\n"); 1345ef19298bSStefan Weinhuber return 0; 1346ef19298bSStefan Weinhuber } else 1347ef19298bSStefan Weinhuber return mdc * FCX_MAX_DATA_FACTOR; 1348ef19298bSStefan Weinhuber #else 1349ef19298bSStefan Weinhuber return 0; 1350ef19298bSStefan Weinhuber #endif 1351ef19298bSStefan Weinhuber } 1352ef19298bSStefan Weinhuber 135340545573SHorst Hummel /* 13543d052595SHorst Hummel * Check device characteristics. 13553d052595SHorst Hummel * If the device is accessible using ECKD discipline, the device is enabled. 13563d052595SHorst Hummel */ 13571da177e4SLinus Torvalds static int 13581da177e4SLinus Torvalds dasd_eckd_check_characteristics(struct dasd_device *device) 13591da177e4SLinus Torvalds { 13601da177e4SLinus Torvalds struct dasd_eckd_private *private; 13618e09f215SStefan Weinhuber struct dasd_block *block; 13622dedf0d9SStefan Haberland struct dasd_uid temp_uid; 13637c8faa86SStefan Haberland int is_known, rc, i; 136433b62a30SStefan Weinhuber int readonly; 13657c8faa86SStefan Haberland unsigned long value; 13661da177e4SLinus Torvalds 1367454e1fa1SPeter Oberparleiter if (!ccw_device_is_pathgroup(device->cdev)) { 1368454e1fa1SPeter Oberparleiter dev_warn(&device->cdev->dev, 1369454e1fa1SPeter Oberparleiter "A channel path group could not be established\n"); 1370454e1fa1SPeter Oberparleiter return -EIO; 1371454e1fa1SPeter Oberparleiter } 1372454e1fa1SPeter Oberparleiter if (!ccw_device_is_multipath(device->cdev)) { 1373454e1fa1SPeter Oberparleiter dev_info(&device->cdev->dev, 1374454e1fa1SPeter Oberparleiter "The DASD is not operating in multipath mode\n"); 1375454e1fa1SPeter Oberparleiter } 13761da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 137792636b15SSebastian Ott if (!private) { 137892636b15SSebastian Ott private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); 137992636b15SSebastian Ott if (!private) { 1380fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1381fc19f381SStefan Haberland "Allocating memory for private DASD data " 1382fc19f381SStefan Haberland "failed\n"); 13831da177e4SLinus Torvalds return -ENOMEM; 13841da177e4SLinus Torvalds } 13851da177e4SLinus Torvalds device->private = (void *) private; 138692636b15SSebastian Ott } else { 138792636b15SSebastian Ott memset(private, 0, sizeof(*private)); 13881da177e4SLinus Torvalds } 13891da177e4SLinus Torvalds /* Invalidate status of initial analysis. */ 13901da177e4SLinus Torvalds private->init_cqr_status = -1; 13911da177e4SLinus Torvalds /* Set default cache operations. */ 13921da177e4SLinus Torvalds private->attrib.operation = DASD_NORMAL_CACHE; 13931da177e4SLinus Torvalds private->attrib.nr_cyl = 0; 13941da177e4SLinus Torvalds 139540545573SHorst Hummel /* Read Configuration Data */ 139640545573SHorst Hummel rc = dasd_eckd_read_conf(device); 139740545573SHorst Hummel if (rc) 13988e09f215SStefan Weinhuber goto out_err1; 139940545573SHorst Hummel 14007c8faa86SStefan Haberland /* set default timeout */ 14017c8faa86SStefan Haberland device->default_expires = DASD_EXPIRES; 14027c8faa86SStefan Haberland if (private->gneq) { 14037c8faa86SStefan Haberland value = 1; 14047c8faa86SStefan Haberland for (i = 0; i < private->gneq->timeout.value; i++) 14057c8faa86SStefan Haberland value = 10 * value; 14067c8faa86SStefan Haberland value = value * private->gneq->timeout.number; 14077c8faa86SStefan Haberland /* do not accept useless values */ 14087c8faa86SStefan Haberland if (value != 0 && value <= DASD_EXPIRES_MAX) 14097c8faa86SStefan Haberland device->default_expires = value; 14107c8faa86SStefan Haberland } 14117c8faa86SStefan Haberland 14122dedf0d9SStefan Haberland /* Generate device unique id */ 14132dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 141440545573SHorst Hummel if (rc) 14158e09f215SStefan Weinhuber goto out_err1; 14168e09f215SStefan Weinhuber 14172dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 14182dedf0d9SStefan Haberland if (temp_uid.type == UA_BASE_DEVICE) { 14198e09f215SStefan Weinhuber block = dasd_alloc_block(); 14208e09f215SStefan Weinhuber if (IS_ERR(block)) { 1421b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1422b8ed5dd5SStefan Haberland "could not allocate dasd " 1423b8ed5dd5SStefan Haberland "block structure"); 14248e09f215SStefan Weinhuber rc = PTR_ERR(block); 14258e09f215SStefan Weinhuber goto out_err1; 14268e09f215SStefan Weinhuber } 14278e09f215SStefan Weinhuber device->block = block; 14288e09f215SStefan Weinhuber block->base = device; 14298e09f215SStefan Weinhuber } 14308e09f215SStefan Weinhuber 14318e09f215SStefan Weinhuber /* register lcu with alias handling, enable PAV if this is a new lcu */ 14328e09f215SStefan Weinhuber is_known = dasd_alias_make_device_known_to_lcu(device); 14338e09f215SStefan Weinhuber if (is_known < 0) { 14348e09f215SStefan Weinhuber rc = is_known; 14358e09f215SStefan Weinhuber goto out_err2; 14368e09f215SStefan Weinhuber } 1437f4ac1d02SStefan Weinhuber /* 1438817f2c84SNikanth Karthikesan * dasd_eckd_validate_server is done on the first device that 1439f4ac1d02SStefan Weinhuber * is found for an LCU. All later other devices have to wait 1440f4ac1d02SStefan Weinhuber * for it, so they will read the correct feature codes. 1441f4ac1d02SStefan Weinhuber */ 14428e09f215SStefan Weinhuber if (!is_known) { 1443f4ac1d02SStefan Weinhuber dasd_eckd_validate_server(device); 1444f4ac1d02SStefan Weinhuber dasd_alias_lcu_setup_complete(device); 1445f4ac1d02SStefan Weinhuber } else 1446f4ac1d02SStefan Weinhuber dasd_alias_wait_for_lcu_setup(device); 1447f4ac1d02SStefan Weinhuber 1448f4ac1d02SStefan Weinhuber /* device may report different configuration data after LCU setup */ 1449f4ac1d02SStefan Weinhuber rc = dasd_eckd_read_conf(device); 145040545573SHorst Hummel if (rc) 14518e09f215SStefan Weinhuber goto out_err3; 14528e09f215SStefan Weinhuber 14538e09f215SStefan Weinhuber /* Read Feature Codes */ 145468d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 145540545573SHorst Hummel 14561da177e4SLinus Torvalds /* Read Device Characteristics */ 145768b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 145868b781feSStefan Haberland &private->rdc_data, 64); 14598e09f215SStefan Weinhuber if (rc) { 1460b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1461b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 14628e09f215SStefan Weinhuber goto out_err3; 14638e09f215SStefan Weinhuber } 1464817f2c84SNikanth Karthikesan /* find the valid cylinder size */ 1465b44b0ab3SStefan Weinhuber if (private->rdc_data.no_cyl == LV_COMPAT_CYL && 1466b44b0ab3SStefan Weinhuber private->rdc_data.long_no_cyl) 1467b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.long_no_cyl; 1468b44b0ab3SStefan Weinhuber else 1469b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.no_cyl; 1470b44b0ab3SStefan Weinhuber 1471ef19298bSStefan Weinhuber private->fcx_max_data = get_fcx_max_data(device); 1472ef19298bSStefan Weinhuber 147333b62a30SStefan Weinhuber readonly = dasd_device_is_ro(device); 147433b62a30SStefan Weinhuber if (readonly) 147533b62a30SStefan Weinhuber set_bit(DASD_FLAG_DEVICE_RO, &device->flags); 147633b62a30SStefan Weinhuber 1477fc19f381SStefan Haberland dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " 147833b62a30SStefan Weinhuber "with %d cylinders, %d heads, %d sectors%s\n", 14791da177e4SLinus Torvalds private->rdc_data.dev_type, 14801da177e4SLinus Torvalds private->rdc_data.dev_model, 14811da177e4SLinus Torvalds private->rdc_data.cu_type, 14821da177e4SLinus Torvalds private->rdc_data.cu_model.model, 1483b44b0ab3SStefan Weinhuber private->real_cyl, 14841da177e4SLinus Torvalds private->rdc_data.trk_per_cyl, 148533b62a30SStefan Weinhuber private->rdc_data.sec_per_trk, 148633b62a30SStefan Weinhuber readonly ? ", read-only device" : ""); 14878e09f215SStefan Weinhuber return 0; 14888e09f215SStefan Weinhuber 14898e09f215SStefan Weinhuber out_err3: 14908e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 14918e09f215SStefan Weinhuber out_err2: 14928e09f215SStefan Weinhuber dasd_free_block(device->block); 14938e09f215SStefan Weinhuber device->block = NULL; 14948e09f215SStefan Weinhuber out_err1: 14954abb08c2SStefan Weinhuber kfree(private->conf_data); 14968e09f215SStefan Weinhuber kfree(device->private); 14978e09f215SStefan Weinhuber device->private = NULL; 14983d052595SHorst Hummel return rc; 14991da177e4SLinus Torvalds } 15001da177e4SLinus Torvalds 15018e09f215SStefan Weinhuber static void dasd_eckd_uncheck_device(struct dasd_device *device) 15028e09f215SStefan Weinhuber { 15034abb08c2SStefan Weinhuber struct dasd_eckd_private *private; 15044abb08c2SStefan Weinhuber 15054abb08c2SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 15068e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 15074abb08c2SStefan Weinhuber private->ned = NULL; 15084abb08c2SStefan Weinhuber private->sneq = NULL; 15094abb08c2SStefan Weinhuber private->vdsneq = NULL; 15104abb08c2SStefan Weinhuber private->gneq = NULL; 15114abb08c2SStefan Weinhuber private->conf_len = 0; 15124abb08c2SStefan Weinhuber kfree(private->conf_data); 15134abb08c2SStefan Weinhuber private->conf_data = NULL; 15148e09f215SStefan Weinhuber } 15158e09f215SStefan Weinhuber 15161da177e4SLinus Torvalds static struct dasd_ccw_req * 15171da177e4SLinus Torvalds dasd_eckd_analysis_ccw(struct dasd_device *device) 15181da177e4SLinus Torvalds { 15191da177e4SLinus Torvalds struct dasd_eckd_private *private; 15201da177e4SLinus Torvalds struct eckd_count *count_data; 15211da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 15221da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 15231da177e4SLinus Torvalds struct ccw1 *ccw; 15241da177e4SLinus Torvalds int cplength, datasize; 15251da177e4SLinus Torvalds int i; 15261da177e4SLinus Torvalds 15271da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 15281da177e4SLinus Torvalds 15291da177e4SLinus Torvalds cplength = 8; 15301da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 153168b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 15321da177e4SLinus Torvalds if (IS_ERR(cqr)) 15331da177e4SLinus Torvalds return cqr; 15341da177e4SLinus Torvalds ccw = cqr->cpaddr; 15351da177e4SLinus Torvalds /* Define extent for the first 3 tracks. */ 15361da177e4SLinus Torvalds define_extent(ccw++, cqr->data, 0, 2, 15371da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device); 15381da177e4SLinus Torvalds LO_data = cqr->data + sizeof(struct DE_eckd_data); 15391da177e4SLinus Torvalds /* Locate record for the first 4 records on track 0. */ 15401da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 15411da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 0, 0, 4, 15421da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 15431da177e4SLinus Torvalds 15441da177e4SLinus Torvalds count_data = private->count_area; 15451da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 15461da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 15471da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 15481da177e4SLinus Torvalds ccw->flags = 0; 15491da177e4SLinus Torvalds ccw->count = 8; 15501da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 15511da177e4SLinus Torvalds ccw++; 15521da177e4SLinus Torvalds count_data++; 15531da177e4SLinus Torvalds } 15541da177e4SLinus Torvalds 15551da177e4SLinus Torvalds /* Locate record for the first record on track 2. */ 15561da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 15571da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 2, 0, 1, 15581da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 15591da177e4SLinus Torvalds /* Read count ccw. */ 15601da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 15611da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 15621da177e4SLinus Torvalds ccw->flags = 0; 15631da177e4SLinus Torvalds ccw->count = 8; 15641da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 15651da177e4SLinus Torvalds 15668e09f215SStefan Weinhuber cqr->block = NULL; 15678e09f215SStefan Weinhuber cqr->startdev = device; 15688e09f215SStefan Weinhuber cqr->memdev = device; 1569eb6e199bSStefan Weinhuber cqr->retries = 255; 15701da177e4SLinus Torvalds cqr->buildclk = get_clock(); 15711da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 15721da177e4SLinus Torvalds return cqr; 15731da177e4SLinus Torvalds } 15741da177e4SLinus Torvalds 1575eb6e199bSStefan Weinhuber /* differentiate between 'no record found' and any other error */ 1576eb6e199bSStefan Weinhuber static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) 1577eb6e199bSStefan Weinhuber { 1578eb6e199bSStefan Weinhuber char *sense; 1579eb6e199bSStefan Weinhuber if (init_cqr->status == DASD_CQR_DONE) 1580eb6e199bSStefan Weinhuber return INIT_CQR_OK; 1581eb6e199bSStefan Weinhuber else if (init_cqr->status == DASD_CQR_NEED_ERP || 1582eb6e199bSStefan Weinhuber init_cqr->status == DASD_CQR_FAILED) { 1583eb6e199bSStefan Weinhuber sense = dasd_get_sense(&init_cqr->irb); 1584eb6e199bSStefan Weinhuber if (sense && (sense[1] & SNS1_NO_REC_FOUND)) 1585eb6e199bSStefan Weinhuber return INIT_CQR_UNFORMATTED; 1586eb6e199bSStefan Weinhuber else 1587eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 1588eb6e199bSStefan Weinhuber } else 1589eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 1590eb6e199bSStefan Weinhuber } 1591eb6e199bSStefan Weinhuber 15921da177e4SLinus Torvalds /* 15931da177e4SLinus Torvalds * This is the callback function for the init_analysis cqr. It saves 15941da177e4SLinus Torvalds * the status of the initial analysis ccw before it frees it and kicks 15951da177e4SLinus Torvalds * the device to continue the startup sequence. This will call 15961da177e4SLinus Torvalds * dasd_eckd_do_analysis again (if the devices has not been marked 15971da177e4SLinus Torvalds * for deletion in the meantime). 15981da177e4SLinus Torvalds */ 1599eb6e199bSStefan Weinhuber static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, 1600eb6e199bSStefan Weinhuber void *data) 16011da177e4SLinus Torvalds { 16021da177e4SLinus Torvalds struct dasd_eckd_private *private; 16031da177e4SLinus Torvalds struct dasd_device *device; 16041da177e4SLinus Torvalds 16058e09f215SStefan Weinhuber device = init_cqr->startdev; 16061da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 1607eb6e199bSStefan Weinhuber private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); 16081da177e4SLinus Torvalds dasd_sfree_request(init_cqr, device); 16091da177e4SLinus Torvalds dasd_kick_device(device); 16101da177e4SLinus Torvalds } 16111da177e4SLinus Torvalds 1612eb6e199bSStefan Weinhuber static int dasd_eckd_start_analysis(struct dasd_block *block) 16131da177e4SLinus Torvalds { 16141da177e4SLinus Torvalds struct dasd_eckd_private *private; 16151da177e4SLinus Torvalds struct dasd_ccw_req *init_cqr; 16161da177e4SLinus Torvalds 16178e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 16188e09f215SStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(block->base); 16191da177e4SLinus Torvalds if (IS_ERR(init_cqr)) 16201da177e4SLinus Torvalds return PTR_ERR(init_cqr); 16211da177e4SLinus Torvalds init_cqr->callback = dasd_eckd_analysis_callback; 16221da177e4SLinus Torvalds init_cqr->callback_data = NULL; 16231da177e4SLinus Torvalds init_cqr->expires = 5*HZ; 1624eb6e199bSStefan Weinhuber /* first try without ERP, so we can later handle unformatted 1625eb6e199bSStefan Weinhuber * devices as special case 1626eb6e199bSStefan Weinhuber */ 1627eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); 1628eb6e199bSStefan Weinhuber init_cqr->retries = 0; 16291da177e4SLinus Torvalds dasd_add_request_head(init_cqr); 16301da177e4SLinus Torvalds return -EAGAIN; 16311da177e4SLinus Torvalds } 16321da177e4SLinus Torvalds 1633eb6e199bSStefan Weinhuber static int dasd_eckd_end_analysis(struct dasd_block *block) 16341da177e4SLinus Torvalds { 16358e09f215SStefan Weinhuber struct dasd_device *device; 16361da177e4SLinus Torvalds struct dasd_eckd_private *private; 16371da177e4SLinus Torvalds struct eckd_count *count_area; 16381da177e4SLinus Torvalds unsigned int sb, blk_per_trk; 16391da177e4SLinus Torvalds int status, i; 1640eb6e199bSStefan Weinhuber struct dasd_ccw_req *init_cqr; 16411da177e4SLinus Torvalds 16428e09f215SStefan Weinhuber device = block->base; 16431da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 16441da177e4SLinus Torvalds status = private->init_cqr_status; 16451da177e4SLinus Torvalds private->init_cqr_status = -1; 1646eb6e199bSStefan Weinhuber if (status == INIT_CQR_ERROR) { 1647eb6e199bSStefan Weinhuber /* try again, this time with full ERP */ 1648eb6e199bSStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(device); 1649eb6e199bSStefan Weinhuber dasd_sleep_on(init_cqr); 1650eb6e199bSStefan Weinhuber status = dasd_eckd_analysis_evaluation(init_cqr); 1651eb6e199bSStefan Weinhuber dasd_sfree_request(init_cqr, device); 1652eb6e199bSStefan Weinhuber } 1653eb6e199bSStefan Weinhuber 1654e4dbb0f2SStefan Haberland if (device->features & DASD_FEATURE_USERAW) { 1655e4dbb0f2SStefan Haberland block->bp_block = DASD_RAW_BLOCKSIZE; 1656e4dbb0f2SStefan Haberland blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; 1657e4dbb0f2SStefan Haberland block->s2b_shift = 3; 1658e4dbb0f2SStefan Haberland goto raw; 1659e4dbb0f2SStefan Haberland } 1660e4dbb0f2SStefan Haberland 1661eb6e199bSStefan Weinhuber if (status == INIT_CQR_UNFORMATTED) { 1662eb6e199bSStefan Weinhuber dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); 16631da177e4SLinus Torvalds return -EMEDIUMTYPE; 1664eb6e199bSStefan Weinhuber } else if (status == INIT_CQR_ERROR) { 1665eb6e199bSStefan Weinhuber dev_err(&device->cdev->dev, 1666eb6e199bSStefan Weinhuber "Detecting the DASD disk layout failed because " 1667eb6e199bSStefan Weinhuber "of an I/O error\n"); 1668eb6e199bSStefan Weinhuber return -EIO; 16691da177e4SLinus Torvalds } 16701da177e4SLinus Torvalds 16711da177e4SLinus Torvalds private->uses_cdl = 1; 16721da177e4SLinus Torvalds /* Check Track 0 for Compatible Disk Layout */ 16731da177e4SLinus Torvalds count_area = NULL; 16741da177e4SLinus Torvalds for (i = 0; i < 3; i++) { 16751da177e4SLinus Torvalds if (private->count_area[i].kl != 4 || 16761da177e4SLinus Torvalds private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4) { 16771da177e4SLinus Torvalds private->uses_cdl = 0; 16781da177e4SLinus Torvalds break; 16791da177e4SLinus Torvalds } 16801da177e4SLinus Torvalds } 16811da177e4SLinus Torvalds if (i == 3) 16821da177e4SLinus Torvalds count_area = &private->count_area[4]; 16831da177e4SLinus Torvalds 16841da177e4SLinus Torvalds if (private->uses_cdl == 0) { 16851da177e4SLinus Torvalds for (i = 0; i < 5; i++) { 16861da177e4SLinus Torvalds if ((private->count_area[i].kl != 0) || 16871da177e4SLinus Torvalds (private->count_area[i].dl != 16881da177e4SLinus Torvalds private->count_area[0].dl)) 16891da177e4SLinus Torvalds break; 16901da177e4SLinus Torvalds } 16911da177e4SLinus Torvalds if (i == 5) 16921da177e4SLinus Torvalds count_area = &private->count_area[0]; 16931da177e4SLinus Torvalds } else { 16941da177e4SLinus Torvalds if (private->count_area[3].record == 1) 1695fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1696fc19f381SStefan Haberland "Track 0 has no records following the VTOC\n"); 16971da177e4SLinus Torvalds } 1698e4dbb0f2SStefan Haberland 16991da177e4SLinus Torvalds if (count_area != NULL && count_area->kl == 0) { 17001da177e4SLinus Torvalds /* we found notthing violating our disk layout */ 17011da177e4SLinus Torvalds if (dasd_check_blocksize(count_area->dl) == 0) 17028e09f215SStefan Weinhuber block->bp_block = count_area->dl; 17031da177e4SLinus Torvalds } 17048e09f215SStefan Weinhuber if (block->bp_block == 0) { 1705fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1706fc19f381SStefan Haberland "The disk layout of the DASD is not supported\n"); 17071da177e4SLinus Torvalds return -EMEDIUMTYPE; 17081da177e4SLinus Torvalds } 17098e09f215SStefan Weinhuber block->s2b_shift = 0; /* bits to shift 512 to get a block */ 17108e09f215SStefan Weinhuber for (sb = 512; sb < block->bp_block; sb = sb << 1) 17118e09f215SStefan Weinhuber block->s2b_shift++; 17121da177e4SLinus Torvalds 17138e09f215SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 1714e4dbb0f2SStefan Haberland 1715e4dbb0f2SStefan Haberland raw: 1716b44b0ab3SStefan Weinhuber block->blocks = (private->real_cyl * 17171da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 17181da177e4SLinus Torvalds blk_per_trk); 17191da177e4SLinus Torvalds 1720fc19f381SStefan Haberland dev_info(&device->cdev->dev, 1721fc19f381SStefan Haberland "DASD with %d KB/block, %d KB total size, %d KB/track, " 1722fc19f381SStefan Haberland "%s\n", (block->bp_block >> 10), 1723b44b0ab3SStefan Weinhuber ((private->real_cyl * 17241da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 17258e09f215SStefan Weinhuber blk_per_trk * (block->bp_block >> 9)) >> 1), 17268e09f215SStefan Weinhuber ((blk_per_trk * block->bp_block) >> 10), 17271da177e4SLinus Torvalds private->uses_cdl ? 17281da177e4SLinus Torvalds "compatible disk layout" : "linux disk layout"); 17291da177e4SLinus Torvalds 17301da177e4SLinus Torvalds return 0; 17311da177e4SLinus Torvalds } 17321da177e4SLinus Torvalds 17338e09f215SStefan Weinhuber static int dasd_eckd_do_analysis(struct dasd_block *block) 17341da177e4SLinus Torvalds { 17351da177e4SLinus Torvalds struct dasd_eckd_private *private; 17361da177e4SLinus Torvalds 17378e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 17381da177e4SLinus Torvalds if (private->init_cqr_status < 0) 17398e09f215SStefan Weinhuber return dasd_eckd_start_analysis(block); 17401da177e4SLinus Torvalds else 17418e09f215SStefan Weinhuber return dasd_eckd_end_analysis(block); 17421da177e4SLinus Torvalds } 17431da177e4SLinus Torvalds 17448e09f215SStefan Weinhuber static int dasd_eckd_ready_to_online(struct dasd_device *device) 17458e09f215SStefan Weinhuber { 17468e09f215SStefan Weinhuber return dasd_alias_add_device(device); 17478e09f215SStefan Weinhuber }; 17488e09f215SStefan Weinhuber 17498e09f215SStefan Weinhuber static int dasd_eckd_online_to_ready(struct dasd_device *device) 17508e09f215SStefan Weinhuber { 1751501183f2SStefan Haberland cancel_work_sync(&device->reload_device); 17528e09f215SStefan Weinhuber return dasd_alias_remove_device(device); 17538e09f215SStefan Weinhuber }; 17548e09f215SStefan Weinhuber 17551da177e4SLinus Torvalds static int 17568e09f215SStefan Weinhuber dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 17571da177e4SLinus Torvalds { 17581da177e4SLinus Torvalds struct dasd_eckd_private *private; 17591da177e4SLinus Torvalds 17608e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 17618e09f215SStefan Weinhuber if (dasd_check_blocksize(block->bp_block) == 0) { 17621da177e4SLinus Torvalds geo->sectors = recs_per_track(&private->rdc_data, 17638e09f215SStefan Weinhuber 0, block->bp_block); 17641da177e4SLinus Torvalds } 17651da177e4SLinus Torvalds geo->cylinders = private->rdc_data.no_cyl; 17661da177e4SLinus Torvalds geo->heads = private->rdc_data.trk_per_cyl; 17671da177e4SLinus Torvalds return 0; 17681da177e4SLinus Torvalds } 17691da177e4SLinus Torvalds 17701da177e4SLinus Torvalds static struct dasd_ccw_req * 17711da177e4SLinus Torvalds dasd_eckd_format_device(struct dasd_device * device, 17721da177e4SLinus Torvalds struct format_data_t * fdata) 17731da177e4SLinus Torvalds { 17741da177e4SLinus Torvalds struct dasd_eckd_private *private; 17751da177e4SLinus Torvalds struct dasd_ccw_req *fcp; 17761da177e4SLinus Torvalds struct eckd_count *ect; 17771da177e4SLinus Torvalds struct ccw1 *ccw; 17781da177e4SLinus Torvalds void *data; 1779b44b0ab3SStefan Weinhuber int rpt; 1780b44b0ab3SStefan Weinhuber struct ch_t address; 17811da177e4SLinus Torvalds int cplength, datasize; 17821da177e4SLinus Torvalds int i; 1783f9a28f7bSJean-Baptiste Joret int intensity = 0; 1784f9a28f7bSJean-Baptiste Joret int r0_perm; 17851da177e4SLinus Torvalds 17861da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 17871da177e4SLinus Torvalds rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize); 1788b44b0ab3SStefan Weinhuber set_ch_t(&address, 1789b44b0ab3SStefan Weinhuber fdata->start_unit / private->rdc_data.trk_per_cyl, 1790b44b0ab3SStefan Weinhuber fdata->start_unit % private->rdc_data.trk_per_cyl); 17911da177e4SLinus Torvalds 17921da177e4SLinus Torvalds /* Sanity checks. */ 17931da177e4SLinus Torvalds if (fdata->start_unit >= 1794b44b0ab3SStefan Weinhuber (private->real_cyl * private->rdc_data.trk_per_cyl)) { 1795fc19f381SStefan Haberland dev_warn(&device->cdev->dev, "Start track number %d used in " 1796fc19f381SStefan Haberland "formatting is too big\n", fdata->start_unit); 17971da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 17981da177e4SLinus Torvalds } 17991da177e4SLinus Torvalds if (fdata->start_unit > fdata->stop_unit) { 1800fc19f381SStefan Haberland dev_warn(&device->cdev->dev, "Start track %d used in " 1801fc19f381SStefan Haberland "formatting exceeds end track\n", fdata->start_unit); 18021da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 18031da177e4SLinus Torvalds } 18041da177e4SLinus Torvalds if (dasd_check_blocksize(fdata->blksize) != 0) { 1805fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1806fc19f381SStefan Haberland "The DASD cannot be formatted with block size %d\n", 18071da177e4SLinus Torvalds fdata->blksize); 18081da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 18091da177e4SLinus Torvalds } 18101da177e4SLinus Torvalds 18111da177e4SLinus Torvalds /* 18121da177e4SLinus Torvalds * fdata->intensity is a bit string that tells us what to do: 18131da177e4SLinus Torvalds * Bit 0: write record zero 18141da177e4SLinus Torvalds * Bit 1: write home address, currently not supported 18151da177e4SLinus Torvalds * Bit 2: invalidate tracks 18161da177e4SLinus Torvalds * Bit 3: use OS/390 compatible disk layout (cdl) 1817f9a28f7bSJean-Baptiste Joret * Bit 4: do not allow storage subsystem to modify record zero 18181da177e4SLinus Torvalds * Only some bit combinations do make sense. 18191da177e4SLinus Torvalds */ 1820f9a28f7bSJean-Baptiste Joret if (fdata->intensity & 0x10) { 1821f9a28f7bSJean-Baptiste Joret r0_perm = 0; 1822f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity & ~0x10; 1823f9a28f7bSJean-Baptiste Joret } else { 1824f9a28f7bSJean-Baptiste Joret r0_perm = 1; 1825f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity; 1826f9a28f7bSJean-Baptiste Joret } 1827f9a28f7bSJean-Baptiste Joret switch (intensity) { 18281da177e4SLinus Torvalds case 0x00: /* Normal format */ 18291da177e4SLinus Torvalds case 0x08: /* Normal format, use cdl. */ 18301da177e4SLinus Torvalds cplength = 2 + rpt; 18311da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 18321da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 18331da177e4SLinus Torvalds rpt * sizeof(struct eckd_count); 18341da177e4SLinus Torvalds break; 18351da177e4SLinus Torvalds case 0x01: /* Write record zero and format track. */ 18361da177e4SLinus Torvalds case 0x09: /* Write record zero and format track, use cdl. */ 18371da177e4SLinus Torvalds cplength = 3 + rpt; 18381da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 18391da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 18401da177e4SLinus Torvalds sizeof(struct eckd_count) + 18411da177e4SLinus Torvalds rpt * sizeof(struct eckd_count); 18421da177e4SLinus Torvalds break; 18431da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 18441da177e4SLinus Torvalds case 0x0c: /* Invalidate track, use cdl. */ 18451da177e4SLinus Torvalds cplength = 3; 18461da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 18471da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 18481da177e4SLinus Torvalds sizeof(struct eckd_count); 18491da177e4SLinus Torvalds break; 18501da177e4SLinus Torvalds default: 1851fc19f381SStefan Haberland dev_warn(&device->cdev->dev, "An I/O control call used " 1852fc19f381SStefan Haberland "incorrect flags 0x%x\n", fdata->intensity); 18531da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 18541da177e4SLinus Torvalds } 18551da177e4SLinus Torvalds /* Allocate the format ccw request. */ 185668b781feSStefan Haberland fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 18571da177e4SLinus Torvalds if (IS_ERR(fcp)) 18581da177e4SLinus Torvalds return fcp; 18591da177e4SLinus Torvalds 18601da177e4SLinus Torvalds data = fcp->data; 18611da177e4SLinus Torvalds ccw = fcp->cpaddr; 18621da177e4SLinus Torvalds 1863f9a28f7bSJean-Baptiste Joret switch (intensity & ~0x08) { 18641da177e4SLinus Torvalds case 0x00: /* Normal format. */ 18651da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 18661da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 18671da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device); 1868f9a28f7bSJean-Baptiste Joret /* grant subsystem permission to format R0 */ 1869f9a28f7bSJean-Baptiste Joret if (r0_perm) 1870f9a28f7bSJean-Baptiste Joret ((struct DE_eckd_data *)data)->ga_extended |= 0x04; 18711da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 18721da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18731da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 18741da177e4SLinus Torvalds fdata->start_unit, 0, rpt, 18751da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device, 18761da177e4SLinus Torvalds fdata->blksize); 18771da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 18781da177e4SLinus Torvalds break; 18791da177e4SLinus Torvalds case 0x01: /* Write record zero + format track. */ 18801da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 18811da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 18821da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, 18831da177e4SLinus Torvalds device); 18841da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 18851da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18861da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 18871da177e4SLinus Torvalds fdata->start_unit, 0, rpt + 1, 18881da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, device, 18898e09f215SStefan Weinhuber device->block->bp_block); 18901da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 18911da177e4SLinus Torvalds break; 18921da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 18931da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 18941da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 18951da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device); 18961da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 18971da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18981da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 18991da177e4SLinus Torvalds fdata->start_unit, 0, 1, 19001da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device, 8); 19011da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 19021da177e4SLinus Torvalds break; 19031da177e4SLinus Torvalds } 1904f9a28f7bSJean-Baptiste Joret if (intensity & 0x01) { /* write record zero */ 19051da177e4SLinus Torvalds ect = (struct eckd_count *) data; 19061da177e4SLinus Torvalds data += sizeof(struct eckd_count); 1907b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 1908b44b0ab3SStefan Weinhuber ect->head = address.head; 19091da177e4SLinus Torvalds ect->record = 0; 19101da177e4SLinus Torvalds ect->kl = 0; 19111da177e4SLinus Torvalds ect->dl = 8; 19121da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 19131da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 19141da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 19151da177e4SLinus Torvalds ccw->count = 8; 19161da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 19171da177e4SLinus Torvalds ccw++; 19181da177e4SLinus Torvalds } 1919f9a28f7bSJean-Baptiste Joret if ((intensity & ~0x08) & 0x04) { /* erase track */ 19201da177e4SLinus Torvalds ect = (struct eckd_count *) data; 19211da177e4SLinus Torvalds data += sizeof(struct eckd_count); 1922b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 1923b44b0ab3SStefan Weinhuber ect->head = address.head; 19241da177e4SLinus Torvalds ect->record = 1; 19251da177e4SLinus Torvalds ect->kl = 0; 19261da177e4SLinus Torvalds ect->dl = 0; 19271da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 19281da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 19291da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 19301da177e4SLinus Torvalds ccw->count = 8; 19311da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 19321da177e4SLinus Torvalds } else { /* write remaining records */ 19331da177e4SLinus Torvalds for (i = 0; i < rpt; i++) { 19341da177e4SLinus Torvalds ect = (struct eckd_count *) data; 19351da177e4SLinus Torvalds data += sizeof(struct eckd_count); 1936b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 1937b44b0ab3SStefan Weinhuber ect->head = address.head; 19381da177e4SLinus Torvalds ect->record = i + 1; 19391da177e4SLinus Torvalds ect->kl = 0; 19401da177e4SLinus Torvalds ect->dl = fdata->blksize; 19411da177e4SLinus Torvalds /* Check for special tracks 0-1 when formatting CDL */ 1942f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 19431da177e4SLinus Torvalds fdata->start_unit == 0) { 19441da177e4SLinus Torvalds if (i < 3) { 19451da177e4SLinus Torvalds ect->kl = 4; 19461da177e4SLinus Torvalds ect->dl = sizes_trk0[i] - 4; 19471da177e4SLinus Torvalds } 19481da177e4SLinus Torvalds } 1949f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 19501da177e4SLinus Torvalds fdata->start_unit == 1) { 19511da177e4SLinus Torvalds ect->kl = 44; 19521da177e4SLinus Torvalds ect->dl = LABEL_SIZE - 44; 19531da177e4SLinus Torvalds } 19541da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 19551da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 19561da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 19571da177e4SLinus Torvalds ccw->count = 8; 19581da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 19591da177e4SLinus Torvalds ccw++; 19601da177e4SLinus Torvalds } 19611da177e4SLinus Torvalds } 19628e09f215SStefan Weinhuber fcp->startdev = device; 19638e09f215SStefan Weinhuber fcp->memdev = device; 1964eb6e199bSStefan Weinhuber fcp->retries = 256; 19651da177e4SLinus Torvalds fcp->buildclk = get_clock(); 19661da177e4SLinus Torvalds fcp->status = DASD_CQR_FILLED; 19671da177e4SLinus Torvalds return fcp; 19681da177e4SLinus Torvalds } 19691da177e4SLinus Torvalds 19708e09f215SStefan Weinhuber static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 19711da177e4SLinus Torvalds { 19728e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 19738e09f215SStefan Weinhuber if (cqr->block && (cqr->startdev != cqr->block->base)) { 19748e09f215SStefan Weinhuber dasd_eckd_reset_ccw_to_base_io(cqr); 19758e09f215SStefan Weinhuber cqr->startdev = cqr->block->base; 1976a4d26c6aSStefan Weinhuber cqr->lpm = cqr->block->base->path_data.opm; 19771da177e4SLinus Torvalds } 19788e09f215SStefan Weinhuber }; 19791da177e4SLinus Torvalds 19801da177e4SLinus Torvalds static dasd_erp_fn_t 19811da177e4SLinus Torvalds dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 19821da177e4SLinus Torvalds { 19838e09f215SStefan Weinhuber struct dasd_device *device = (struct dasd_device *) cqr->startdev; 19841da177e4SLinus Torvalds struct ccw_device *cdev = device->cdev; 19851da177e4SLinus Torvalds 19861da177e4SLinus Torvalds switch (cdev->id.cu_type) { 19871da177e4SLinus Torvalds case 0x3990: 19881da177e4SLinus Torvalds case 0x2105: 19891da177e4SLinus Torvalds case 0x2107: 19901da177e4SLinus Torvalds case 0x1750: 19911da177e4SLinus Torvalds return dasd_3990_erp_action; 19921da177e4SLinus Torvalds case 0x9343: 19931da177e4SLinus Torvalds case 0x3880: 19941da177e4SLinus Torvalds default: 19951da177e4SLinus Torvalds return dasd_default_erp_action; 19961da177e4SLinus Torvalds } 19971da177e4SLinus Torvalds } 19981da177e4SLinus Torvalds 19991da177e4SLinus Torvalds static dasd_erp_fn_t 20001da177e4SLinus Torvalds dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 20011da177e4SLinus Torvalds { 20021da177e4SLinus Torvalds return dasd_default_erp_postaction; 20031da177e4SLinus Torvalds } 20041da177e4SLinus Torvalds 20055a27e60dSStefan Weinhuber static void dasd_eckd_check_for_device_change(struct dasd_device *device, 20065a27e60dSStefan Weinhuber struct dasd_ccw_req *cqr, 20078e09f215SStefan Weinhuber struct irb *irb) 20088e09f215SStefan Weinhuber { 20098e09f215SStefan Weinhuber char mask; 2010f3eb5384SStefan Weinhuber char *sense = NULL; 2011501183f2SStefan Haberland struct dasd_eckd_private *private; 20128e09f215SStefan Weinhuber 2013501183f2SStefan Haberland private = (struct dasd_eckd_private *) device->private; 20148e09f215SStefan Weinhuber /* first of all check for state change pending interrupt */ 20158e09f215SStefan Weinhuber mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 2016f3eb5384SStefan Weinhuber if ((scsw_dstat(&irb->scsw) & mask) == mask) { 2017501183f2SStefan Haberland /* for alias only and not in offline processing*/ 2018501183f2SStefan Haberland if (!device->block && private->lcu && 2019501183f2SStefan Haberland !test_bit(DASD_FLAG_OFFLINE, &device->flags)) { 2020501183f2SStefan Haberland /* 2021501183f2SStefan Haberland * the state change could be caused by an alias 2022501183f2SStefan Haberland * reassignment remove device from alias handling 2023501183f2SStefan Haberland * to prevent new requests from being scheduled on 2024501183f2SStefan Haberland * the wrong alias device 2025501183f2SStefan Haberland */ 2026501183f2SStefan Haberland dasd_alias_remove_device(device); 2027501183f2SStefan Haberland 2028501183f2SStefan Haberland /* schedule worker to reload device */ 2029501183f2SStefan Haberland dasd_reload_device(device); 2030501183f2SStefan Haberland } 20318e09f215SStefan Weinhuber dasd_generic_handle_state_change(device); 20328e09f215SStefan Weinhuber return; 20338e09f215SStefan Weinhuber } 20348e09f215SStefan Weinhuber 2035a5a0061fSStefan Weinhuber sense = dasd_get_sense(irb); 20365a27e60dSStefan Weinhuber if (!sense) 20375a27e60dSStefan Weinhuber return; 20385a27e60dSStefan Weinhuber 20395a27e60dSStefan Weinhuber /* summary unit check */ 20405a27e60dSStefan Weinhuber if ((sense[7] == 0x0D) && 2041a5a0061fSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { 20428e09f215SStefan Weinhuber dasd_alias_handle_summary_unit_check(device, irb); 20438e09f215SStefan Weinhuber return; 20448e09f215SStefan Weinhuber } 20458e09f215SStefan Weinhuber 2046f60c768cSStefan Haberland /* service information message SIM */ 20475a27e60dSStefan Weinhuber if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && 2048f3eb5384SStefan Weinhuber ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 2049f3eb5384SStefan Weinhuber dasd_3990_erp_handle_sim(device, sense); 2050f60c768cSStefan Haberland return; 2051f60c768cSStefan Haberland } 2052f60c768cSStefan Haberland 20535a27e60dSStefan Weinhuber /* loss of device reservation is handled via base devices only 20545a27e60dSStefan Weinhuber * as alias devices may be used with several bases 20555a27e60dSStefan Weinhuber */ 20565a27e60dSStefan Weinhuber if (device->block && (sense[7] == 0x3F) && 20575a27e60dSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && 20585a27e60dSStefan Weinhuber test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { 20595a27e60dSStefan Weinhuber if (device->features & DASD_FEATURE_FAILONSLCK) 20605a27e60dSStefan Weinhuber set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); 20615a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 20625a27e60dSStefan Weinhuber dev_err(&device->cdev->dev, 20635a27e60dSStefan Weinhuber "The device reservation was lost\n"); 2064ada3df91SStefan Haberland } 20655a27e60dSStefan Weinhuber } 2066f3eb5384SStefan Weinhuber 2067f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( 2068f3eb5384SStefan Weinhuber struct dasd_device *startdev, 20698e09f215SStefan Weinhuber struct dasd_block *block, 2070f3eb5384SStefan Weinhuber struct request *req, 2071f3eb5384SStefan Weinhuber sector_t first_rec, 2072f3eb5384SStefan Weinhuber sector_t last_rec, 2073f3eb5384SStefan Weinhuber sector_t first_trk, 2074f3eb5384SStefan Weinhuber sector_t last_trk, 2075f3eb5384SStefan Weinhuber unsigned int first_offs, 2076f3eb5384SStefan Weinhuber unsigned int last_offs, 2077f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 2078f3eb5384SStefan Weinhuber unsigned int blksize) 20791da177e4SLinus Torvalds { 20801da177e4SLinus Torvalds struct dasd_eckd_private *private; 20811da177e4SLinus Torvalds unsigned long *idaws; 20821da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 20831da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 20841da177e4SLinus Torvalds struct ccw1 *ccw; 20855705f702SNeilBrown struct req_iterator iter; 20861da177e4SLinus Torvalds struct bio_vec *bv; 20871da177e4SLinus Torvalds char *dst; 2088f3eb5384SStefan Weinhuber unsigned int off; 20891da177e4SLinus Torvalds int count, cidaw, cplength, datasize; 2090f3eb5384SStefan Weinhuber sector_t recid; 20911da177e4SLinus Torvalds unsigned char cmd, rcmd; 20928e09f215SStefan Weinhuber int use_prefix; 20938e09f215SStefan Weinhuber struct dasd_device *basedev; 20941da177e4SLinus Torvalds 20958e09f215SStefan Weinhuber basedev = block->base; 20968e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 20971da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 20981da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_READ_MT; 20991da177e4SLinus Torvalds else if (rq_data_dir(req) == WRITE) 21001da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_WRITE_MT; 21011da177e4SLinus Torvalds else 21021da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 2103f3eb5384SStefan Weinhuber 21041da177e4SLinus Torvalds /* Check struct bio and count the number of blocks for the request. */ 21051da177e4SLinus Torvalds count = 0; 21061da177e4SLinus Torvalds cidaw = 0; 21075705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 21081da177e4SLinus Torvalds if (bv->bv_len & (blksize - 1)) 21091da177e4SLinus Torvalds /* Eckd can only do full blocks. */ 21101da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 21118e09f215SStefan Weinhuber count += bv->bv_len >> (block->s2b_shift + 9); 2112347a8dc3SMartin Schwidefsky #if defined(CONFIG_64BIT) 21136c92e699SJens Axboe if (idal_is_needed (page_address(bv->bv_page), bv->bv_len)) 21148e09f215SStefan Weinhuber cidaw += bv->bv_len >> (block->s2b_shift + 9); 21151da177e4SLinus Torvalds #endif 21161da177e4SLinus Torvalds } 21171da177e4SLinus Torvalds /* Paranoia. */ 21181da177e4SLinus Torvalds if (count != last_rec - first_rec + 1) 21191da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 21208e09f215SStefan Weinhuber 21218e09f215SStefan Weinhuber /* use the prefix command if available */ 21228e09f215SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 21238e09f215SStefan Weinhuber if (use_prefix) { 21248e09f215SStefan Weinhuber /* 1x prefix + number of blocks */ 21258e09f215SStefan Weinhuber cplength = 2 + count; 21268e09f215SStefan Weinhuber /* 1x prefix + cidaws*sizeof(long) */ 21278e09f215SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 21288e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 21298e09f215SStefan Weinhuber cidaw * sizeof(unsigned long); 21308e09f215SStefan Weinhuber } else { 21311da177e4SLinus Torvalds /* 1x define extent + 1x locate record + number of blocks */ 21321da177e4SLinus Torvalds cplength = 2 + count; 21331da177e4SLinus Torvalds /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 21348e09f215SStefan Weinhuber datasize = sizeof(struct DE_eckd_data) + 21358e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 21361da177e4SLinus Torvalds cidaw * sizeof(unsigned long); 21378e09f215SStefan Weinhuber } 21381da177e4SLinus Torvalds /* Find out the number of additional locate record ccws for cdl. */ 21391da177e4SLinus Torvalds if (private->uses_cdl && first_rec < 2*blk_per_trk) { 21401da177e4SLinus Torvalds if (last_rec >= 2*blk_per_trk) 21411da177e4SLinus Torvalds count = 2*blk_per_trk - first_rec; 21421da177e4SLinus Torvalds cplength += count; 21431da177e4SLinus Torvalds datasize += count*sizeof(struct LO_eckd_data); 21441da177e4SLinus Torvalds } 21451da177e4SLinus Torvalds /* Allocate the ccw request. */ 214668b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 214768b781feSStefan Haberland startdev); 21481da177e4SLinus Torvalds if (IS_ERR(cqr)) 21491da177e4SLinus Torvalds return cqr; 21501da177e4SLinus Torvalds ccw = cqr->cpaddr; 21518e09f215SStefan Weinhuber /* First ccw is define extent or prefix. */ 21528e09f215SStefan Weinhuber if (use_prefix) { 21538e09f215SStefan Weinhuber if (prefix(ccw++, cqr->data, first_trk, 21548e09f215SStefan Weinhuber last_trk, cmd, basedev, startdev) == -EAGAIN) { 21558e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 21568e09f215SStefan Weinhuber * Try again later. 21578e09f215SStefan Weinhuber */ 21588e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2159d54853efSMartin Schwidefsky return ERR_PTR(-EAGAIN); 2160d54853efSMartin Schwidefsky } 21618e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 21628e09f215SStefan Weinhuber sizeof(struct PFX_eckd_data)); 21638e09f215SStefan Weinhuber } else { 21648e09f215SStefan Weinhuber if (define_extent(ccw++, cqr->data, first_trk, 21658e09f215SStefan Weinhuber last_trk, cmd, startdev) == -EAGAIN) { 21668e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 21678e09f215SStefan Weinhuber * Try again later. 21688e09f215SStefan Weinhuber */ 21698e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 21708e09f215SStefan Weinhuber return ERR_PTR(-EAGAIN); 21718e09f215SStefan Weinhuber } 21728e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 21738e09f215SStefan Weinhuber sizeof(struct DE_eckd_data)); 21748e09f215SStefan Weinhuber } 21751da177e4SLinus Torvalds /* Build locate_record+read/write/ccws. */ 21761da177e4SLinus Torvalds LO_data = (struct LO_eckd_data *) (idaws + cidaw); 21771da177e4SLinus Torvalds recid = first_rec; 21781da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 21791da177e4SLinus Torvalds /* Only standard blocks so there is just one locate record. */ 21801da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 21811da177e4SLinus Torvalds locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 21828e09f215SStefan Weinhuber last_rec - recid + 1, cmd, basedev, blksize); 21831da177e4SLinus Torvalds } 21845705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 21851da177e4SLinus Torvalds dst = page_address(bv->bv_page) + bv->bv_offset; 21861da177e4SLinus Torvalds if (dasd_page_cache) { 21871da177e4SLinus Torvalds char *copy = kmem_cache_alloc(dasd_page_cache, 2188441e143eSChristoph Lameter GFP_DMA | __GFP_NOWARN); 21891da177e4SLinus Torvalds if (copy && rq_data_dir(req) == WRITE) 21901da177e4SLinus Torvalds memcpy(copy + bv->bv_offset, dst, bv->bv_len); 21911da177e4SLinus Torvalds if (copy) 21921da177e4SLinus Torvalds dst = copy + bv->bv_offset; 21931da177e4SLinus Torvalds } 21941da177e4SLinus Torvalds for (off = 0; off < bv->bv_len; off += blksize) { 21951da177e4SLinus Torvalds sector_t trkid = recid; 21961da177e4SLinus Torvalds unsigned int recoffs = sector_div(trkid, blk_per_trk); 21971da177e4SLinus Torvalds rcmd = cmd; 21981da177e4SLinus Torvalds count = blksize; 21991da177e4SLinus Torvalds /* Locate record for cdl special block ? */ 22001da177e4SLinus Torvalds if (private->uses_cdl && recid < 2*blk_per_trk) { 22011da177e4SLinus Torvalds if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 22021da177e4SLinus Torvalds rcmd |= 0x8; 22031da177e4SLinus Torvalds count = dasd_eckd_cdl_reclen(recid); 2204ec5883abSHorst Hummel if (count < blksize && 2205ec5883abSHorst Hummel rq_data_dir(req) == READ) 22061da177e4SLinus Torvalds memset(dst + count, 0xe5, 22071da177e4SLinus Torvalds blksize - count); 22081da177e4SLinus Torvalds } 22091da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 22101da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 22111da177e4SLinus Torvalds trkid, recoffs + 1, 22128e09f215SStefan Weinhuber 1, rcmd, basedev, count); 22131da177e4SLinus Torvalds } 22141da177e4SLinus Torvalds /* Locate record for standard blocks ? */ 22151da177e4SLinus Torvalds if (private->uses_cdl && recid == 2*blk_per_trk) { 22161da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 22171da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 22181da177e4SLinus Torvalds trkid, recoffs + 1, 22191da177e4SLinus Torvalds last_rec - recid + 1, 22208e09f215SStefan Weinhuber cmd, basedev, count); 22211da177e4SLinus Torvalds } 22221da177e4SLinus Torvalds /* Read/write ccw. */ 22231da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 22241da177e4SLinus Torvalds ccw->cmd_code = rcmd; 22251da177e4SLinus Torvalds ccw->count = count; 22261da177e4SLinus Torvalds if (idal_is_needed(dst, blksize)) { 22271da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) idaws; 22281da177e4SLinus Torvalds ccw->flags = CCW_FLAG_IDA; 22291da177e4SLinus Torvalds idaws = idal_create_words(idaws, dst, blksize); 22301da177e4SLinus Torvalds } else { 22311da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) dst; 22321da177e4SLinus Torvalds ccw->flags = 0; 22331da177e4SLinus Torvalds } 22341da177e4SLinus Torvalds ccw++; 22351da177e4SLinus Torvalds dst += blksize; 22361da177e4SLinus Torvalds recid++; 22371da177e4SLinus Torvalds } 22381da177e4SLinus Torvalds } 223913de227bSHolger Smolinski if (blk_noretry_request(req) || 224013de227bSHolger Smolinski block->base->features & DASD_FEATURE_FAILFAST) 22411c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 22428e09f215SStefan Weinhuber cqr->startdev = startdev; 22438e09f215SStefan Weinhuber cqr->memdev = startdev; 22448e09f215SStefan Weinhuber cqr->block = block; 22457c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2246a4d26c6aSStefan Weinhuber cqr->lpm = startdev->path_data.ppm; 22471da177e4SLinus Torvalds cqr->retries = 256; 22481da177e4SLinus Torvalds cqr->buildclk = get_clock(); 22491da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 22501da177e4SLinus Torvalds return cqr; 22511da177e4SLinus Torvalds } 22521da177e4SLinus Torvalds 2253f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 2254f3eb5384SStefan Weinhuber struct dasd_device *startdev, 2255f3eb5384SStefan Weinhuber struct dasd_block *block, 2256f3eb5384SStefan Weinhuber struct request *req, 2257f3eb5384SStefan Weinhuber sector_t first_rec, 2258f3eb5384SStefan Weinhuber sector_t last_rec, 2259f3eb5384SStefan Weinhuber sector_t first_trk, 2260f3eb5384SStefan Weinhuber sector_t last_trk, 2261f3eb5384SStefan Weinhuber unsigned int first_offs, 2262f3eb5384SStefan Weinhuber unsigned int last_offs, 2263f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 2264f3eb5384SStefan Weinhuber unsigned int blksize) 2265f3eb5384SStefan Weinhuber { 2266f3eb5384SStefan Weinhuber struct dasd_eckd_private *private; 2267f3eb5384SStefan Weinhuber unsigned long *idaws; 2268f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 2269f3eb5384SStefan Weinhuber struct ccw1 *ccw; 2270f3eb5384SStefan Weinhuber struct req_iterator iter; 2271f3eb5384SStefan Weinhuber struct bio_vec *bv; 2272f3eb5384SStefan Weinhuber char *dst, *idaw_dst; 2273f3eb5384SStefan Weinhuber unsigned int cidaw, cplength, datasize; 2274f3eb5384SStefan Weinhuber unsigned int tlf; 2275f3eb5384SStefan Weinhuber sector_t recid; 2276f3eb5384SStefan Weinhuber unsigned char cmd; 2277f3eb5384SStefan Weinhuber struct dasd_device *basedev; 2278f3eb5384SStefan Weinhuber unsigned int trkcount, count, count_to_trk_end; 2279f3eb5384SStefan Weinhuber unsigned int idaw_len, seg_len, part_len, len_to_track_end; 2280f3eb5384SStefan Weinhuber unsigned char new_track, end_idaw; 2281f3eb5384SStefan Weinhuber sector_t trkid; 2282f3eb5384SStefan Weinhuber unsigned int recoffs; 2283f3eb5384SStefan Weinhuber 2284f3eb5384SStefan Weinhuber basedev = block->base; 2285f3eb5384SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 2286f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) 2287f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 2288f3eb5384SStefan Weinhuber else if (rq_data_dir(req) == WRITE) 2289f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 2290f3eb5384SStefan Weinhuber else 2291f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 2292f3eb5384SStefan Weinhuber 2293f3eb5384SStefan Weinhuber /* Track based I/O needs IDAWs for each page, and not just for 2294f3eb5384SStefan Weinhuber * 64 bit addresses. We need additional idals for pages 2295f3eb5384SStefan Weinhuber * that get filled from two tracks, so we use the number 2296f3eb5384SStefan Weinhuber * of records as upper limit. 2297f3eb5384SStefan Weinhuber */ 2298f3eb5384SStefan Weinhuber cidaw = last_rec - first_rec + 1; 2299f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 2300f3eb5384SStefan Weinhuber 2301f3eb5384SStefan Weinhuber /* 1x prefix + one read/write ccw per track */ 2302f3eb5384SStefan Weinhuber cplength = 1 + trkcount; 2303f3eb5384SStefan Weinhuber 2304f3eb5384SStefan Weinhuber /* on 31-bit we need space for two 32 bit addresses per page 2305f3eb5384SStefan Weinhuber * on 64-bit one 64 bit address 2306f3eb5384SStefan Weinhuber */ 2307f3eb5384SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 2308f3eb5384SStefan Weinhuber cidaw * sizeof(unsigned long long); 2309f3eb5384SStefan Weinhuber 2310f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 231168b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 231268b781feSStefan Haberland startdev); 2313f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 2314f3eb5384SStefan Weinhuber return cqr; 2315f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 2316f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 2317f3eb5384SStefan Weinhuber if (first_trk == last_trk) 2318f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 2319f3eb5384SStefan Weinhuber else 2320f3eb5384SStefan Weinhuber tlf = last_offs + 1; 2321f3eb5384SStefan Weinhuber tlf *= blksize; 2322f3eb5384SStefan Weinhuber 2323f3eb5384SStefan Weinhuber if (prefix_LRE(ccw++, cqr->data, first_trk, 2324f3eb5384SStefan Weinhuber last_trk, cmd, basedev, startdev, 2325f3eb5384SStefan Weinhuber 1 /* format */, first_offs + 1, 2326f3eb5384SStefan Weinhuber trkcount, blksize, 2327f3eb5384SStefan Weinhuber tlf) == -EAGAIN) { 2328f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 2329f3eb5384SStefan Weinhuber * Try again later. 2330f3eb5384SStefan Weinhuber */ 2331f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2332f3eb5384SStefan Weinhuber return ERR_PTR(-EAGAIN); 2333f3eb5384SStefan Weinhuber } 2334f3eb5384SStefan Weinhuber 2335f3eb5384SStefan Weinhuber /* 2336f3eb5384SStefan Weinhuber * The translation of request into ccw programs must meet the 2337f3eb5384SStefan Weinhuber * following conditions: 2338f3eb5384SStefan Weinhuber * - all idaws but the first and the last must address full pages 2339f3eb5384SStefan Weinhuber * (or 2K blocks on 31-bit) 2340f3eb5384SStefan Weinhuber * - the scope of a ccw and it's idal ends with the track boundaries 2341f3eb5384SStefan Weinhuber */ 2342f3eb5384SStefan Weinhuber idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); 2343f3eb5384SStefan Weinhuber recid = first_rec; 2344f3eb5384SStefan Weinhuber new_track = 1; 2345f3eb5384SStefan Weinhuber end_idaw = 0; 2346f3eb5384SStefan Weinhuber len_to_track_end = 0; 2347f3eb5384SStefan Weinhuber idaw_dst = 0; 2348f3eb5384SStefan Weinhuber idaw_len = 0; 2349f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 2350f3eb5384SStefan Weinhuber dst = page_address(bv->bv_page) + bv->bv_offset; 2351f3eb5384SStefan Weinhuber seg_len = bv->bv_len; 2352f3eb5384SStefan Weinhuber while (seg_len) { 2353f3eb5384SStefan Weinhuber if (new_track) { 2354f3eb5384SStefan Weinhuber trkid = recid; 2355f3eb5384SStefan Weinhuber recoffs = sector_div(trkid, blk_per_trk); 2356f3eb5384SStefan Weinhuber count_to_trk_end = blk_per_trk - recoffs; 2357f3eb5384SStefan Weinhuber count = min((last_rec - recid + 1), 2358f3eb5384SStefan Weinhuber (sector_t)count_to_trk_end); 2359f3eb5384SStefan Weinhuber len_to_track_end = count * blksize; 2360f3eb5384SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 2361f3eb5384SStefan Weinhuber ccw->cmd_code = cmd; 2362f3eb5384SStefan Weinhuber ccw->count = len_to_track_end; 2363f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 2364f3eb5384SStefan Weinhuber ccw->flags = CCW_FLAG_IDA; 2365f3eb5384SStefan Weinhuber ccw++; 2366f3eb5384SStefan Weinhuber recid += count; 2367f3eb5384SStefan Weinhuber new_track = 0; 236852db45c3SStefan Weinhuber /* first idaw for a ccw may start anywhere */ 236952db45c3SStefan Weinhuber if (!idaw_dst) 237052db45c3SStefan Weinhuber idaw_dst = dst; 2371f3eb5384SStefan Weinhuber } 237252db45c3SStefan Weinhuber /* If we start a new idaw, we must make sure that it 237352db45c3SStefan Weinhuber * starts on an IDA_BLOCK_SIZE boundary. 2374f3eb5384SStefan Weinhuber * If we continue an idaw, we must make sure that the 2375f3eb5384SStefan Weinhuber * current segment begins where the so far accumulated 2376f3eb5384SStefan Weinhuber * idaw ends 2377f3eb5384SStefan Weinhuber */ 237852db45c3SStefan Weinhuber if (!idaw_dst) { 237952db45c3SStefan Weinhuber if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { 238052db45c3SStefan Weinhuber dasd_sfree_request(cqr, startdev); 238152db45c3SStefan Weinhuber return ERR_PTR(-ERANGE); 238252db45c3SStefan Weinhuber } else 2383f3eb5384SStefan Weinhuber idaw_dst = dst; 238452db45c3SStefan Weinhuber } 2385f3eb5384SStefan Weinhuber if ((idaw_dst + idaw_len) != dst) { 2386f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2387f3eb5384SStefan Weinhuber return ERR_PTR(-ERANGE); 2388f3eb5384SStefan Weinhuber } 2389f3eb5384SStefan Weinhuber part_len = min(seg_len, len_to_track_end); 2390f3eb5384SStefan Weinhuber seg_len -= part_len; 2391f3eb5384SStefan Weinhuber dst += part_len; 2392f3eb5384SStefan Weinhuber idaw_len += part_len; 2393f3eb5384SStefan Weinhuber len_to_track_end -= part_len; 2394f3eb5384SStefan Weinhuber /* collected memory area ends on an IDA_BLOCK border, 2395f3eb5384SStefan Weinhuber * -> create an idaw 2396f3eb5384SStefan Weinhuber * idal_create_words will handle cases where idaw_len 2397f3eb5384SStefan Weinhuber * is larger then IDA_BLOCK_SIZE 2398f3eb5384SStefan Weinhuber */ 2399f3eb5384SStefan Weinhuber if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) 2400f3eb5384SStefan Weinhuber end_idaw = 1; 2401f3eb5384SStefan Weinhuber /* We also need to end the idaw at track end */ 2402f3eb5384SStefan Weinhuber if (!len_to_track_end) { 2403f3eb5384SStefan Weinhuber new_track = 1; 2404f3eb5384SStefan Weinhuber end_idaw = 1; 2405f3eb5384SStefan Weinhuber } 2406f3eb5384SStefan Weinhuber if (end_idaw) { 2407f3eb5384SStefan Weinhuber idaws = idal_create_words(idaws, idaw_dst, 2408f3eb5384SStefan Weinhuber idaw_len); 2409f3eb5384SStefan Weinhuber idaw_dst = 0; 2410f3eb5384SStefan Weinhuber idaw_len = 0; 2411f3eb5384SStefan Weinhuber end_idaw = 0; 2412f3eb5384SStefan Weinhuber } 2413f3eb5384SStefan Weinhuber } 2414f3eb5384SStefan Weinhuber } 2415f3eb5384SStefan Weinhuber 2416f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 2417f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 2418f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2419f3eb5384SStefan Weinhuber cqr->startdev = startdev; 2420f3eb5384SStefan Weinhuber cqr->memdev = startdev; 2421f3eb5384SStefan Weinhuber cqr->block = block; 24227c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2423a4d26c6aSStefan Weinhuber cqr->lpm = startdev->path_data.ppm; 2424f3eb5384SStefan Weinhuber cqr->retries = 256; 2425f3eb5384SStefan Weinhuber cqr->buildclk = get_clock(); 2426f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 2427f3eb5384SStefan Weinhuber return cqr; 2428f3eb5384SStefan Weinhuber } 2429f3eb5384SStefan Weinhuber 2430f3eb5384SStefan Weinhuber static int prepare_itcw(struct itcw *itcw, 2431f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 2432f3eb5384SStefan Weinhuber struct dasd_device *basedev, 2433f3eb5384SStefan Weinhuber struct dasd_device *startdev, 2434f3eb5384SStefan Weinhuber unsigned int rec_on_trk, int count, 2435f3eb5384SStefan Weinhuber unsigned int blksize, 2436f3eb5384SStefan Weinhuber unsigned int total_data_size, 2437f3eb5384SStefan Weinhuber unsigned int tlf, 2438f3eb5384SStefan Weinhuber unsigned int blk_per_trk) 2439f3eb5384SStefan Weinhuber { 2440f3eb5384SStefan Weinhuber struct PFX_eckd_data pfxdata; 2441f3eb5384SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 2442f3eb5384SStefan Weinhuber struct DE_eckd_data *dedata; 2443f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 2444f3eb5384SStefan Weinhuber struct dcw *dcw; 2445f3eb5384SStefan Weinhuber 2446f3eb5384SStefan Weinhuber u32 begcyl, endcyl; 2447f3eb5384SStefan Weinhuber u16 heads, beghead, endhead; 2448f3eb5384SStefan Weinhuber u8 pfx_cmd; 2449f3eb5384SStefan Weinhuber 2450f3eb5384SStefan Weinhuber int rc = 0; 2451f3eb5384SStefan Weinhuber int sector = 0; 2452f3eb5384SStefan Weinhuber int dn, d; 2453f3eb5384SStefan Weinhuber 2454f3eb5384SStefan Weinhuber 2455f3eb5384SStefan Weinhuber /* setup prefix data */ 2456f3eb5384SStefan Weinhuber basepriv = (struct dasd_eckd_private *) basedev->private; 2457f3eb5384SStefan Weinhuber startpriv = (struct dasd_eckd_private *) startdev->private; 2458f3eb5384SStefan Weinhuber dedata = &pfxdata.define_extent; 2459f3eb5384SStefan Weinhuber lredata = &pfxdata.locate_record; 2460f3eb5384SStefan Weinhuber 2461f3eb5384SStefan Weinhuber memset(&pfxdata, 0, sizeof(pfxdata)); 2462f3eb5384SStefan Weinhuber pfxdata.format = 1; /* PFX with LRE */ 2463f3eb5384SStefan Weinhuber pfxdata.base_address = basepriv->ned->unit_addr; 2464f3eb5384SStefan Weinhuber pfxdata.base_lss = basepriv->ned->ID; 2465f3eb5384SStefan Weinhuber pfxdata.validity.define_extent = 1; 2466f3eb5384SStefan Weinhuber 2467f3eb5384SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 2468f3eb5384SStefan Weinhuber if (startpriv->uid.type != UA_BASE_DEVICE) { 2469f3eb5384SStefan Weinhuber pfxdata.validity.verify_base = 1; 2470f3eb5384SStefan Weinhuber if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 2471f3eb5384SStefan Weinhuber pfxdata.validity.hyper_pav = 1; 2472f3eb5384SStefan Weinhuber } 2473f3eb5384SStefan Weinhuber 2474f3eb5384SStefan Weinhuber switch (cmd) { 2475f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 2476f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 2477f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 2478f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 2479f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 2480f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 2481f3eb5384SStefan Weinhuber lredata->operation.operation = 0x0C; 2482f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x01; 2483f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX_READ; 2484f3eb5384SStefan Weinhuber break; 2485f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 2486f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 2487f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 2488f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 2489f3eb5384SStefan Weinhuber rc = check_XRC_on_prefix(&pfxdata, basedev); 2490f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 2491f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 2492f3eb5384SStefan Weinhuber lredata->operation.operation = 0x3F; 2493f3eb5384SStefan Weinhuber lredata->extended_operation = 0x23; 2494f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x2; 2495f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX; 2496f3eb5384SStefan Weinhuber break; 2497f3eb5384SStefan Weinhuber default: 2498f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 2499f3eb5384SStefan Weinhuber "prepare itcw, unknown opcode 0x%x", cmd); 2500f3eb5384SStefan Weinhuber BUG(); 2501f3eb5384SStefan Weinhuber break; 2502f3eb5384SStefan Weinhuber } 2503f3eb5384SStefan Weinhuber if (rc) 2504f3eb5384SStefan Weinhuber return rc; 2505f3eb5384SStefan Weinhuber 2506f3eb5384SStefan Weinhuber dedata->attributes.mode = 0x3; /* ECKD */ 2507f3eb5384SStefan Weinhuber 2508f3eb5384SStefan Weinhuber heads = basepriv->rdc_data.trk_per_cyl; 2509f3eb5384SStefan Weinhuber begcyl = trk / heads; 2510f3eb5384SStefan Weinhuber beghead = trk % heads; 2511f3eb5384SStefan Weinhuber endcyl = totrk / heads; 2512f3eb5384SStefan Weinhuber endhead = totrk % heads; 2513f3eb5384SStefan Weinhuber 2514f3eb5384SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 2515f3eb5384SStefan Weinhuber if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 2516f3eb5384SStefan Weinhuber dedata->attributes.operation == DASD_SEQ_ACCESS) { 2517f3eb5384SStefan Weinhuber 2518f3eb5384SStefan Weinhuber if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 2519f3eb5384SStefan Weinhuber endcyl += basepriv->attrib.nr_cyl; 2520f3eb5384SStefan Weinhuber else 2521f3eb5384SStefan Weinhuber endcyl = (basepriv->real_cyl - 1); 2522f3eb5384SStefan Weinhuber } 2523f3eb5384SStefan Weinhuber 2524f3eb5384SStefan Weinhuber set_ch_t(&dedata->beg_ext, begcyl, beghead); 2525f3eb5384SStefan Weinhuber set_ch_t(&dedata->end_ext, endcyl, endhead); 2526f3eb5384SStefan Weinhuber 2527f3eb5384SStefan Weinhuber dedata->ep_format = 0x20; /* records per track is valid */ 2528f3eb5384SStefan Weinhuber dedata->ep_rec_per_track = blk_per_trk; 2529f3eb5384SStefan Weinhuber 2530f3eb5384SStefan Weinhuber if (rec_on_trk) { 2531f3eb5384SStefan Weinhuber switch (basepriv->rdc_data.dev_type) { 2532f3eb5384SStefan Weinhuber case 0x3390: 2533f3eb5384SStefan Weinhuber dn = ceil_quot(blksize + 6, 232); 2534f3eb5384SStefan Weinhuber d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); 2535f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 2536f3eb5384SStefan Weinhuber break; 2537f3eb5384SStefan Weinhuber case 0x3380: 2538f3eb5384SStefan Weinhuber d = 7 + ceil_quot(blksize + 12, 32); 2539f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 2540f3eb5384SStefan Weinhuber break; 2541f3eb5384SStefan Weinhuber } 2542f3eb5384SStefan Weinhuber } 2543f3eb5384SStefan Weinhuber 2544f3eb5384SStefan Weinhuber lredata->auxiliary.length_valid = 1; 2545f3eb5384SStefan Weinhuber lredata->auxiliary.length_scope = 1; 2546f3eb5384SStefan Weinhuber lredata->auxiliary.imbedded_ccw_valid = 1; 2547f3eb5384SStefan Weinhuber lredata->length = tlf; 2548f3eb5384SStefan Weinhuber lredata->imbedded_ccw = cmd; 2549f3eb5384SStefan Weinhuber lredata->count = count; 2550f3eb5384SStefan Weinhuber lredata->sector = sector; 2551f3eb5384SStefan Weinhuber set_ch_t(&lredata->seek_addr, begcyl, beghead); 2552f3eb5384SStefan Weinhuber lredata->search_arg.cyl = lredata->seek_addr.cyl; 2553f3eb5384SStefan Weinhuber lredata->search_arg.head = lredata->seek_addr.head; 2554f3eb5384SStefan Weinhuber lredata->search_arg.record = rec_on_trk; 2555f3eb5384SStefan Weinhuber 2556f3eb5384SStefan Weinhuber dcw = itcw_add_dcw(itcw, pfx_cmd, 0, 2557f3eb5384SStefan Weinhuber &pfxdata, sizeof(pfxdata), total_data_size); 2558f3eb5384SStefan Weinhuber 2559f3eb5384SStefan Weinhuber return rc; 2560f3eb5384SStefan Weinhuber } 2561f3eb5384SStefan Weinhuber 2562f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 2563f3eb5384SStefan Weinhuber struct dasd_device *startdev, 2564f3eb5384SStefan Weinhuber struct dasd_block *block, 2565f3eb5384SStefan Weinhuber struct request *req, 2566f3eb5384SStefan Weinhuber sector_t first_rec, 2567f3eb5384SStefan Weinhuber sector_t last_rec, 2568f3eb5384SStefan Weinhuber sector_t first_trk, 2569f3eb5384SStefan Weinhuber sector_t last_trk, 2570f3eb5384SStefan Weinhuber unsigned int first_offs, 2571f3eb5384SStefan Weinhuber unsigned int last_offs, 2572f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 2573f3eb5384SStefan Weinhuber unsigned int blksize) 2574f3eb5384SStefan Weinhuber { 2575f3eb5384SStefan Weinhuber struct dasd_eckd_private *private; 2576f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 2577f3eb5384SStefan Weinhuber struct req_iterator iter; 2578f3eb5384SStefan Weinhuber struct bio_vec *bv; 2579f3eb5384SStefan Weinhuber char *dst; 2580f3eb5384SStefan Weinhuber unsigned int trkcount, ctidaw; 2581f3eb5384SStefan Weinhuber unsigned char cmd; 2582f3eb5384SStefan Weinhuber struct dasd_device *basedev; 2583f3eb5384SStefan Weinhuber unsigned int tlf; 2584f3eb5384SStefan Weinhuber struct itcw *itcw; 2585f3eb5384SStefan Weinhuber struct tidaw *last_tidaw = NULL; 2586f3eb5384SStefan Weinhuber int itcw_op; 2587f3eb5384SStefan Weinhuber size_t itcw_size; 2588ef19298bSStefan Weinhuber u8 tidaw_flags; 2589ef19298bSStefan Weinhuber unsigned int seg_len, part_len, len_to_track_end; 2590ef19298bSStefan Weinhuber unsigned char new_track; 2591ef19298bSStefan Weinhuber sector_t recid, trkid; 2592ef19298bSStefan Weinhuber unsigned int offs; 2593ef19298bSStefan Weinhuber unsigned int count, count_to_trk_end; 2594f3eb5384SStefan Weinhuber 2595f3eb5384SStefan Weinhuber basedev = block->base; 2596f3eb5384SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 2597f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) { 2598f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 2599f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_READ; 2600f3eb5384SStefan Weinhuber } else if (rq_data_dir(req) == WRITE) { 2601f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 2602f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_WRITE; 2603f3eb5384SStefan Weinhuber } else 2604f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 2605f3eb5384SStefan Weinhuber 2606f3eb5384SStefan Weinhuber /* trackbased I/O needs address all memory via TIDAWs, 2607f3eb5384SStefan Weinhuber * not just for 64 bit addresses. This allows us to map 2608f3eb5384SStefan Weinhuber * each segment directly to one tidaw. 2609ef19298bSStefan Weinhuber * In the case of write requests, additional tidaws may 2610ef19298bSStefan Weinhuber * be needed when a segment crosses a track boundary. 2611f3eb5384SStefan Weinhuber */ 2612f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 2613f3eb5384SStefan Weinhuber ctidaw = 0; 2614f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 2615f3eb5384SStefan Weinhuber ++ctidaw; 2616f3eb5384SStefan Weinhuber } 2617ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 2618ef19298bSStefan Weinhuber ctidaw += (last_trk - first_trk); 2619f3eb5384SStefan Weinhuber 2620f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 2621f3eb5384SStefan Weinhuber itcw_size = itcw_calc_size(0, ctidaw, 0); 262268b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 2623f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 2624f3eb5384SStefan Weinhuber return cqr; 2625f3eb5384SStefan Weinhuber 2626f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 2627f3eb5384SStefan Weinhuber if (first_trk == last_trk) 2628f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 2629f3eb5384SStefan Weinhuber else 2630f3eb5384SStefan Weinhuber tlf = last_offs + 1; 2631f3eb5384SStefan Weinhuber tlf *= blksize; 2632f3eb5384SStefan Weinhuber 2633f3eb5384SStefan Weinhuber itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); 2634ef19298bSStefan Weinhuber if (IS_ERR(itcw)) { 2635ef19298bSStefan Weinhuber dasd_sfree_request(cqr, startdev); 2636ef19298bSStefan Weinhuber return ERR_PTR(-EINVAL); 2637ef19298bSStefan Weinhuber } 2638f3eb5384SStefan Weinhuber cqr->cpaddr = itcw_get_tcw(itcw); 2639f3eb5384SStefan Weinhuber if (prepare_itcw(itcw, first_trk, last_trk, 2640f3eb5384SStefan Weinhuber cmd, basedev, startdev, 2641f3eb5384SStefan Weinhuber first_offs + 1, 2642f3eb5384SStefan Weinhuber trkcount, blksize, 2643f3eb5384SStefan Weinhuber (last_rec - first_rec + 1) * blksize, 2644f3eb5384SStefan Weinhuber tlf, blk_per_trk) == -EAGAIN) { 2645f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 2646f3eb5384SStefan Weinhuber * Try again later. 2647f3eb5384SStefan Weinhuber */ 2648f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2649f3eb5384SStefan Weinhuber return ERR_PTR(-EAGAIN); 2650f3eb5384SStefan Weinhuber } 2651d54cddb6SHeiko Carstens len_to_track_end = 0; 2652f3eb5384SStefan Weinhuber /* 2653f3eb5384SStefan Weinhuber * A tidaw can address 4k of memory, but must not cross page boundaries 2654f3eb5384SStefan Weinhuber * We can let the block layer handle this by setting 2655f3eb5384SStefan Weinhuber * blk_queue_segment_boundary to page boundaries and 2656f3eb5384SStefan Weinhuber * blk_max_segment_size to page size when setting up the request queue. 2657ef19298bSStefan Weinhuber * For write requests, a TIDAW must not cross track boundaries, because 2658ef19298bSStefan Weinhuber * we have to set the CBC flag on the last tidaw for each track. 2659f3eb5384SStefan Weinhuber */ 2660ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) { 2661ef19298bSStefan Weinhuber new_track = 1; 2662ef19298bSStefan Weinhuber recid = first_rec; 2663f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 2664f3eb5384SStefan Weinhuber dst = page_address(bv->bv_page) + bv->bv_offset; 2665ef19298bSStefan Weinhuber seg_len = bv->bv_len; 2666ef19298bSStefan Weinhuber while (seg_len) { 2667ef19298bSStefan Weinhuber if (new_track) { 2668ef19298bSStefan Weinhuber trkid = recid; 2669ef19298bSStefan Weinhuber offs = sector_div(trkid, blk_per_trk); 2670ef19298bSStefan Weinhuber count_to_trk_end = blk_per_trk - offs; 2671ef19298bSStefan Weinhuber count = min((last_rec - recid + 1), 2672ef19298bSStefan Weinhuber (sector_t)count_to_trk_end); 2673ef19298bSStefan Weinhuber len_to_track_end = count * blksize; 2674ef19298bSStefan Weinhuber recid += count; 2675ef19298bSStefan Weinhuber new_track = 0; 2676f3eb5384SStefan Weinhuber } 2677ef19298bSStefan Weinhuber part_len = min(seg_len, len_to_track_end); 2678ef19298bSStefan Weinhuber seg_len -= part_len; 2679ef19298bSStefan Weinhuber len_to_track_end -= part_len; 2680ef19298bSStefan Weinhuber /* We need to end the tidaw at track end */ 2681ef19298bSStefan Weinhuber if (!len_to_track_end) { 2682ef19298bSStefan Weinhuber new_track = 1; 2683ef19298bSStefan Weinhuber tidaw_flags = TIDAW_FLAGS_INSERT_CBC; 2684ef19298bSStefan Weinhuber } else 2685ef19298bSStefan Weinhuber tidaw_flags = 0; 2686ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, 2687ef19298bSStefan Weinhuber dst, part_len); 2688ef19298bSStefan Weinhuber if (IS_ERR(last_tidaw)) 2689ef19298bSStefan Weinhuber return ERR_PTR(-EINVAL); 2690ef19298bSStefan Weinhuber dst += part_len; 2691ef19298bSStefan Weinhuber } 2692ef19298bSStefan Weinhuber } 2693ef19298bSStefan Weinhuber } else { 2694ef19298bSStefan Weinhuber rq_for_each_segment(bv, req, iter) { 2695ef19298bSStefan Weinhuber dst = page_address(bv->bv_page) + bv->bv_offset; 2696ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, 0x00, 2697ef19298bSStefan Weinhuber dst, bv->bv_len); 2698ef19298bSStefan Weinhuber if (IS_ERR(last_tidaw)) 2699ef19298bSStefan Weinhuber return ERR_PTR(-EINVAL); 2700ef19298bSStefan Weinhuber } 2701ef19298bSStefan Weinhuber } 2702ef19298bSStefan Weinhuber last_tidaw->flags |= TIDAW_FLAGS_LAST; 2703ef19298bSStefan Weinhuber last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; 2704f3eb5384SStefan Weinhuber itcw_finalize(itcw); 2705f3eb5384SStefan Weinhuber 2706f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 2707f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 2708f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2709ef19298bSStefan Weinhuber cqr->cpmode = 1; 2710f3eb5384SStefan Weinhuber cqr->startdev = startdev; 2711f3eb5384SStefan Weinhuber cqr->memdev = startdev; 2712f3eb5384SStefan Weinhuber cqr->block = block; 27137c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2714a4d26c6aSStefan Weinhuber cqr->lpm = startdev->path_data.ppm; 2715f3eb5384SStefan Weinhuber cqr->retries = 256; 2716f3eb5384SStefan Weinhuber cqr->buildclk = get_clock(); 2717f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 2718f3eb5384SStefan Weinhuber return cqr; 2719f3eb5384SStefan Weinhuber } 2720f3eb5384SStefan Weinhuber 2721f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 2722f3eb5384SStefan Weinhuber struct dasd_block *block, 2723f3eb5384SStefan Weinhuber struct request *req) 2724f3eb5384SStefan Weinhuber { 2725ef19298bSStefan Weinhuber int cmdrtd, cmdwtd; 2726f3eb5384SStefan Weinhuber int use_prefix; 2727ef19298bSStefan Weinhuber int fcx_multitrack; 272845b44d76SStefan Weinhuber struct dasd_eckd_private *private; 2729f3eb5384SStefan Weinhuber struct dasd_device *basedev; 2730f3eb5384SStefan Weinhuber sector_t first_rec, last_rec; 2731f3eb5384SStefan Weinhuber sector_t first_trk, last_trk; 2732f3eb5384SStefan Weinhuber unsigned int first_offs, last_offs; 2733f3eb5384SStefan Weinhuber unsigned int blk_per_trk, blksize; 2734f3eb5384SStefan Weinhuber int cdlspecial; 2735ef19298bSStefan Weinhuber unsigned int data_size; 2736f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 2737f3eb5384SStefan Weinhuber 2738f3eb5384SStefan Weinhuber basedev = block->base; 2739f3eb5384SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 2740f3eb5384SStefan Weinhuber 2741f3eb5384SStefan Weinhuber /* Calculate number of blocks/records per track. */ 2742f3eb5384SStefan Weinhuber blksize = block->bp_block; 2743f3eb5384SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 27446fca97a9SStefan Haberland if (blk_per_trk == 0) 27456fca97a9SStefan Haberland return ERR_PTR(-EINVAL); 2746f3eb5384SStefan Weinhuber /* Calculate record id of first and last block. */ 274783096ebfSTejun Heo first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; 2748f3eb5384SStefan Weinhuber first_offs = sector_div(first_trk, blk_per_trk); 2749f3eb5384SStefan Weinhuber last_rec = last_trk = 275083096ebfSTejun Heo (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 2751f3eb5384SStefan Weinhuber last_offs = sector_div(last_trk, blk_per_trk); 2752f3eb5384SStefan Weinhuber cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); 2753f3eb5384SStefan Weinhuber 2754ef19298bSStefan Weinhuber fcx_multitrack = private->features.feature[40] & 0x20; 2755ef19298bSStefan Weinhuber data_size = blk_rq_bytes(req); 2756ef19298bSStefan Weinhuber /* tpm write request add CBC data on each track boundary */ 2757ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 2758ef19298bSStefan Weinhuber data_size += (last_trk - first_trk) * 4; 2759f3eb5384SStefan Weinhuber 2760f3eb5384SStefan Weinhuber /* is read track data and write track data in command mode supported? */ 2761f3eb5384SStefan Weinhuber cmdrtd = private->features.feature[9] & 0x20; 2762f3eb5384SStefan Weinhuber cmdwtd = private->features.feature[12] & 0x40; 2763f3eb5384SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 2764f3eb5384SStefan Weinhuber 2765f3eb5384SStefan Weinhuber cqr = NULL; 2766f3eb5384SStefan Weinhuber if (cdlspecial || dasd_page_cache) { 2767f3eb5384SStefan Weinhuber /* do nothing, just fall through to the cmd mode single case */ 2768ef19298bSStefan Weinhuber } else if ((data_size <= private->fcx_max_data) 2769ef19298bSStefan Weinhuber && (fcx_multitrack || (first_trk == last_trk))) { 2770f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, 2771f3eb5384SStefan Weinhuber first_rec, last_rec, 2772f3eb5384SStefan Weinhuber first_trk, last_trk, 2773f3eb5384SStefan Weinhuber first_offs, last_offs, 2774f3eb5384SStefan Weinhuber blk_per_trk, blksize); 2775ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 2776ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 2777f3eb5384SStefan Weinhuber cqr = NULL; 2778f3eb5384SStefan Weinhuber } else if (use_prefix && 2779f3eb5384SStefan Weinhuber (((rq_data_dir(req) == READ) && cmdrtd) || 2780f3eb5384SStefan Weinhuber ((rq_data_dir(req) == WRITE) && cmdwtd))) { 2781f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, 2782f3eb5384SStefan Weinhuber first_rec, last_rec, 2783f3eb5384SStefan Weinhuber first_trk, last_trk, 2784f3eb5384SStefan Weinhuber first_offs, last_offs, 2785f3eb5384SStefan Weinhuber blk_per_trk, blksize); 2786ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 2787ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 2788f3eb5384SStefan Weinhuber cqr = NULL; 2789f3eb5384SStefan Weinhuber } 2790f3eb5384SStefan Weinhuber if (!cqr) 2791f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, 2792f3eb5384SStefan Weinhuber first_rec, last_rec, 2793f3eb5384SStefan Weinhuber first_trk, last_trk, 2794f3eb5384SStefan Weinhuber first_offs, last_offs, 2795f3eb5384SStefan Weinhuber blk_per_trk, blksize); 2796f3eb5384SStefan Weinhuber return cqr; 2797f3eb5384SStefan Weinhuber } 2798f3eb5384SStefan Weinhuber 2799e4dbb0f2SStefan Haberland static struct dasd_ccw_req *dasd_raw_build_cp(struct dasd_device *startdev, 2800e4dbb0f2SStefan Haberland struct dasd_block *block, 2801e4dbb0f2SStefan Haberland struct request *req) 2802e4dbb0f2SStefan Haberland { 2803e4dbb0f2SStefan Haberland struct dasd_eckd_private *private; 2804e4dbb0f2SStefan Haberland unsigned long *idaws; 2805e4dbb0f2SStefan Haberland struct dasd_device *basedev; 2806e4dbb0f2SStefan Haberland struct dasd_ccw_req *cqr; 2807e4dbb0f2SStefan Haberland struct ccw1 *ccw; 2808e4dbb0f2SStefan Haberland struct req_iterator iter; 2809e4dbb0f2SStefan Haberland struct bio_vec *bv; 2810e4dbb0f2SStefan Haberland char *dst; 2811e4dbb0f2SStefan Haberland unsigned char cmd; 2812e4dbb0f2SStefan Haberland unsigned int trkcount; 2813e4dbb0f2SStefan Haberland unsigned int seg_len, len_to_track_end; 2814e4dbb0f2SStefan Haberland unsigned int first_offs; 2815e4dbb0f2SStefan Haberland unsigned int cidaw, cplength, datasize; 2816e4dbb0f2SStefan Haberland sector_t first_trk, last_trk; 2817e4dbb0f2SStefan Haberland unsigned int pfx_datasize; 2818e4dbb0f2SStefan Haberland 2819e4dbb0f2SStefan Haberland /* 2820e4dbb0f2SStefan Haberland * raw track access needs to be mutiple of 64k and on 64k boundary 2821e4dbb0f2SStefan Haberland */ 2822e4dbb0f2SStefan Haberland if ((blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK) != 0) { 2823e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EINVAL); 2824e4dbb0f2SStefan Haberland goto out; 2825e4dbb0f2SStefan Haberland } 2826e4dbb0f2SStefan Haberland if (((blk_rq_pos(req) + blk_rq_sectors(req)) % 2827e4dbb0f2SStefan Haberland DASD_RAW_SECTORS_PER_TRACK) != 0) { 2828e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EINVAL); 2829e4dbb0f2SStefan Haberland goto out; 2830e4dbb0f2SStefan Haberland } 2831e4dbb0f2SStefan Haberland 2832e4dbb0f2SStefan Haberland first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; 2833e4dbb0f2SStefan Haberland last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / 2834e4dbb0f2SStefan Haberland DASD_RAW_SECTORS_PER_TRACK; 2835e4dbb0f2SStefan Haberland trkcount = last_trk - first_trk + 1; 2836e4dbb0f2SStefan Haberland first_offs = 0; 2837e4dbb0f2SStefan Haberland basedev = block->base; 2838e4dbb0f2SStefan Haberland private = (struct dasd_eckd_private *) basedev->private; 2839e4dbb0f2SStefan Haberland 2840e4dbb0f2SStefan Haberland if (rq_data_dir(req) == READ) 2841e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_READ_TRACK; 2842e4dbb0f2SStefan Haberland else if (rq_data_dir(req) == WRITE) 2843e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; 2844e4dbb0f2SStefan Haberland else { 2845e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EINVAL); 2846e4dbb0f2SStefan Haberland goto out; 2847e4dbb0f2SStefan Haberland } 2848e4dbb0f2SStefan Haberland 2849e4dbb0f2SStefan Haberland /* 2850e4dbb0f2SStefan Haberland * Raw track based I/O needs IDAWs for each page, 2851e4dbb0f2SStefan Haberland * and not just for 64 bit addresses. 2852e4dbb0f2SStefan Haberland */ 2853e4dbb0f2SStefan Haberland cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; 2854e4dbb0f2SStefan Haberland 2855e4dbb0f2SStefan Haberland /* 1x prefix + one read/write ccw per track */ 2856e4dbb0f2SStefan Haberland cplength = 1 + trkcount; 2857e4dbb0f2SStefan Haberland 2858e4dbb0f2SStefan Haberland /* 2859e4dbb0f2SStefan Haberland * struct PFX_eckd_data has up to 2 byte as extended parameter 2860e4dbb0f2SStefan Haberland * this is needed for write full track and has to be mentioned 2861e4dbb0f2SStefan Haberland * seperately 2862e4dbb0f2SStefan Haberland * add 8 instead of 2 to keep 8 byte boundary 2863e4dbb0f2SStefan Haberland */ 2864e4dbb0f2SStefan Haberland pfx_datasize = sizeof(struct PFX_eckd_data) + 8; 2865e4dbb0f2SStefan Haberland 2866e4dbb0f2SStefan Haberland datasize = pfx_datasize + cidaw * sizeof(unsigned long long); 2867e4dbb0f2SStefan Haberland 2868e4dbb0f2SStefan Haberland /* Allocate the ccw request. */ 2869e4dbb0f2SStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 2870e4dbb0f2SStefan Haberland datasize, startdev); 2871e4dbb0f2SStefan Haberland if (IS_ERR(cqr)) 2872e4dbb0f2SStefan Haberland goto out; 2873e4dbb0f2SStefan Haberland ccw = cqr->cpaddr; 2874e4dbb0f2SStefan Haberland 2875e4dbb0f2SStefan Haberland if (prefix_LRE(ccw++, cqr->data, first_trk, last_trk, cmd, 2876e4dbb0f2SStefan Haberland basedev, startdev, 1 /* format */, first_offs + 1, 2877e4dbb0f2SStefan Haberland trkcount, 0, 0) == -EAGAIN) { 2878e4dbb0f2SStefan Haberland /* Clock not in sync and XRC is enabled. 2879e4dbb0f2SStefan Haberland * Try again later. 2880e4dbb0f2SStefan Haberland */ 2881e4dbb0f2SStefan Haberland dasd_sfree_request(cqr, startdev); 2882e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EAGAIN); 2883e4dbb0f2SStefan Haberland goto out; 2884e4dbb0f2SStefan Haberland } 2885e4dbb0f2SStefan Haberland 2886e4dbb0f2SStefan Haberland idaws = (unsigned long *)(cqr->data + pfx_datasize); 2887e4dbb0f2SStefan Haberland 2888e4dbb0f2SStefan Haberland len_to_track_end = 0; 2889e4dbb0f2SStefan Haberland 2890e4dbb0f2SStefan Haberland rq_for_each_segment(bv, req, iter) { 2891e4dbb0f2SStefan Haberland dst = page_address(bv->bv_page) + bv->bv_offset; 2892e4dbb0f2SStefan Haberland seg_len = bv->bv_len; 2893e4dbb0f2SStefan Haberland if (!len_to_track_end) { 2894e4dbb0f2SStefan Haberland ccw[-1].flags |= CCW_FLAG_CC; 2895e4dbb0f2SStefan Haberland ccw->cmd_code = cmd; 2896e4dbb0f2SStefan Haberland /* maximum 3390 track size */ 2897e4dbb0f2SStefan Haberland ccw->count = 57326; 2898e4dbb0f2SStefan Haberland /* 64k map to one track */ 2899e4dbb0f2SStefan Haberland len_to_track_end = 65536; 2900e4dbb0f2SStefan Haberland ccw->cda = (__u32)(addr_t)idaws; 2901e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_IDA; 2902e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 2903e4dbb0f2SStefan Haberland ccw++; 2904e4dbb0f2SStefan Haberland } 2905e4dbb0f2SStefan Haberland len_to_track_end -= seg_len; 2906e4dbb0f2SStefan Haberland idaws = idal_create_words(idaws, dst, seg_len); 2907e4dbb0f2SStefan Haberland } 2908e4dbb0f2SStefan Haberland 2909e4dbb0f2SStefan Haberland if (blk_noretry_request(req) || 2910e4dbb0f2SStefan Haberland block->base->features & DASD_FEATURE_FAILFAST) 2911e4dbb0f2SStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2912e4dbb0f2SStefan Haberland cqr->startdev = startdev; 2913e4dbb0f2SStefan Haberland cqr->memdev = startdev; 2914e4dbb0f2SStefan Haberland cqr->block = block; 2915e4dbb0f2SStefan Haberland cqr->expires = startdev->default_expires * HZ; 2916e4dbb0f2SStefan Haberland cqr->lpm = startdev->path_data.ppm; 2917e4dbb0f2SStefan Haberland cqr->retries = 256; 2918e4dbb0f2SStefan Haberland cqr->buildclk = get_clock(); 2919e4dbb0f2SStefan Haberland cqr->status = DASD_CQR_FILLED; 2920e4dbb0f2SStefan Haberland 2921e4dbb0f2SStefan Haberland if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN) 2922e4dbb0f2SStefan Haberland cqr = NULL; 2923e4dbb0f2SStefan Haberland out: 2924e4dbb0f2SStefan Haberland return cqr; 2925e4dbb0f2SStefan Haberland } 2926e4dbb0f2SStefan Haberland 2927e4dbb0f2SStefan Haberland 29281da177e4SLinus Torvalds static int 29291da177e4SLinus Torvalds dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 29301da177e4SLinus Torvalds { 29311da177e4SLinus Torvalds struct dasd_eckd_private *private; 29321da177e4SLinus Torvalds struct ccw1 *ccw; 29335705f702SNeilBrown struct req_iterator iter; 29341da177e4SLinus Torvalds struct bio_vec *bv; 29351da177e4SLinus Torvalds char *dst, *cda; 29361da177e4SLinus Torvalds unsigned int blksize, blk_per_trk, off; 29371da177e4SLinus Torvalds sector_t recid; 29385705f702SNeilBrown int status; 29391da177e4SLinus Torvalds 29401da177e4SLinus Torvalds if (!dasd_page_cache) 29411da177e4SLinus Torvalds goto out; 29428e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) cqr->block->base->private; 29438e09f215SStefan Weinhuber blksize = cqr->block->bp_block; 29441da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 294583096ebfSTejun Heo recid = blk_rq_pos(req) >> cqr->block->s2b_shift; 29461da177e4SLinus Torvalds ccw = cqr->cpaddr; 29471da177e4SLinus Torvalds /* Skip over define extent & locate record. */ 29481da177e4SLinus Torvalds ccw++; 29491da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 29501da177e4SLinus Torvalds ccw++; 29515705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 29521da177e4SLinus Torvalds dst = page_address(bv->bv_page) + bv->bv_offset; 29531da177e4SLinus Torvalds for (off = 0; off < bv->bv_len; off += blksize) { 29541da177e4SLinus Torvalds /* Skip locate record. */ 29551da177e4SLinus Torvalds if (private->uses_cdl && recid <= 2*blk_per_trk) 29561da177e4SLinus Torvalds ccw++; 29571da177e4SLinus Torvalds if (dst) { 29581da177e4SLinus Torvalds if (ccw->flags & CCW_FLAG_IDA) 29591da177e4SLinus Torvalds cda = *((char **)((addr_t) ccw->cda)); 29601da177e4SLinus Torvalds else 29611da177e4SLinus Torvalds cda = (char *)((addr_t) ccw->cda); 29621da177e4SLinus Torvalds if (dst != cda) { 29631da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 29641da177e4SLinus Torvalds memcpy(dst, cda, bv->bv_len); 29651da177e4SLinus Torvalds kmem_cache_free(dasd_page_cache, 29661da177e4SLinus Torvalds (void *)((addr_t)cda & PAGE_MASK)); 29671da177e4SLinus Torvalds } 29681da177e4SLinus Torvalds dst = NULL; 29691da177e4SLinus Torvalds } 29701da177e4SLinus Torvalds ccw++; 29711da177e4SLinus Torvalds recid++; 29721da177e4SLinus Torvalds } 29731da177e4SLinus Torvalds } 29741da177e4SLinus Torvalds out: 29751da177e4SLinus Torvalds status = cqr->status == DASD_CQR_DONE; 29768e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 29771da177e4SLinus Torvalds return status; 29781da177e4SLinus Torvalds } 29791da177e4SLinus Torvalds 29808e09f215SStefan Weinhuber /* 2981f3eb5384SStefan Weinhuber * Modify ccw/tcw in cqr so it can be started on a base device. 29828e09f215SStefan Weinhuber * 29838e09f215SStefan Weinhuber * Note that this is not enough to restart the cqr! 29848e09f215SStefan Weinhuber * Either reset cqr->startdev as well (summary unit check handling) 29858e09f215SStefan Weinhuber * or restart via separate cqr (as in ERP handling). 29868e09f215SStefan Weinhuber */ 29878e09f215SStefan Weinhuber void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 29888e09f215SStefan Weinhuber { 29898e09f215SStefan Weinhuber struct ccw1 *ccw; 29908e09f215SStefan Weinhuber struct PFX_eckd_data *pfxdata; 2991f3eb5384SStefan Weinhuber struct tcw *tcw; 2992f3eb5384SStefan Weinhuber struct tccb *tccb; 2993f3eb5384SStefan Weinhuber struct dcw *dcw; 29948e09f215SStefan Weinhuber 2995f3eb5384SStefan Weinhuber if (cqr->cpmode == 1) { 2996f3eb5384SStefan Weinhuber tcw = cqr->cpaddr; 2997f3eb5384SStefan Weinhuber tccb = tcw_get_tccb(tcw); 2998f3eb5384SStefan Weinhuber dcw = (struct dcw *)&tccb->tca[0]; 2999f3eb5384SStefan Weinhuber pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; 3000f3eb5384SStefan Weinhuber pfxdata->validity.verify_base = 0; 3001f3eb5384SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 3002f3eb5384SStefan Weinhuber } else { 30038e09f215SStefan Weinhuber ccw = cqr->cpaddr; 30048e09f215SStefan Weinhuber pfxdata = cqr->data; 30058e09f215SStefan Weinhuber if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 30068e09f215SStefan Weinhuber pfxdata->validity.verify_base = 0; 30078e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 30088e09f215SStefan Weinhuber } 30098e09f215SStefan Weinhuber } 3010f3eb5384SStefan Weinhuber } 30118e09f215SStefan Weinhuber 30128e09f215SStefan Weinhuber #define DASD_ECKD_CHANQ_MAX_SIZE 4 30138e09f215SStefan Weinhuber 30148e09f215SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 30158e09f215SStefan Weinhuber struct dasd_block *block, 30168e09f215SStefan Weinhuber struct request *req) 30178e09f215SStefan Weinhuber { 30188e09f215SStefan Weinhuber struct dasd_eckd_private *private; 30198e09f215SStefan Weinhuber struct dasd_device *startdev; 30208e09f215SStefan Weinhuber unsigned long flags; 30218e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 30228e09f215SStefan Weinhuber 30238e09f215SStefan Weinhuber startdev = dasd_alias_get_start_dev(base); 30248e09f215SStefan Weinhuber if (!startdev) 30258e09f215SStefan Weinhuber startdev = base; 30268e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) startdev->private; 30278e09f215SStefan Weinhuber if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 30288e09f215SStefan Weinhuber return ERR_PTR(-EBUSY); 30298e09f215SStefan Weinhuber 30308e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 30318e09f215SStefan Weinhuber private->count++; 3032e4dbb0f2SStefan Haberland if ((base->features & DASD_FEATURE_USERAW)) 3033e4dbb0f2SStefan Haberland cqr = dasd_raw_build_cp(startdev, block, req); 3034e4dbb0f2SStefan Haberland else 30358e09f215SStefan Weinhuber cqr = dasd_eckd_build_cp(startdev, block, req); 30368e09f215SStefan Weinhuber if (IS_ERR(cqr)) 30378e09f215SStefan Weinhuber private->count--; 30388e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 30398e09f215SStefan Weinhuber return cqr; 30408e09f215SStefan Weinhuber } 30418e09f215SStefan Weinhuber 30428e09f215SStefan Weinhuber static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 30438e09f215SStefan Weinhuber struct request *req) 30448e09f215SStefan Weinhuber { 30458e09f215SStefan Weinhuber struct dasd_eckd_private *private; 30468e09f215SStefan Weinhuber unsigned long flags; 30478e09f215SStefan Weinhuber 30488e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 30498e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) cqr->memdev->private; 30508e09f215SStefan Weinhuber private->count--; 30518e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 30528e09f215SStefan Weinhuber return dasd_eckd_free_cp(cqr, req); 30538e09f215SStefan Weinhuber } 30548e09f215SStefan Weinhuber 30551da177e4SLinus Torvalds static int 30561da177e4SLinus Torvalds dasd_eckd_fill_info(struct dasd_device * device, 30571da177e4SLinus Torvalds struct dasd_information2_t * info) 30581da177e4SLinus Torvalds { 30591da177e4SLinus Torvalds struct dasd_eckd_private *private; 30601da177e4SLinus Torvalds 30611da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 30621da177e4SLinus Torvalds info->label_block = 2; 30631da177e4SLinus Torvalds info->FBA_layout = private->uses_cdl ? 0 : 1; 30641da177e4SLinus Torvalds info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 30651da177e4SLinus Torvalds info->characteristics_size = sizeof(struct dasd_eckd_characteristics); 30661da177e4SLinus Torvalds memcpy(info->characteristics, &private->rdc_data, 30671da177e4SLinus Torvalds sizeof(struct dasd_eckd_characteristics)); 30684abb08c2SStefan Weinhuber info->confdata_size = min((unsigned long)private->conf_len, 30694abb08c2SStefan Weinhuber sizeof(info->configuration_data)); 30704abb08c2SStefan Weinhuber memcpy(info->configuration_data, private->conf_data, 30714abb08c2SStefan Weinhuber info->confdata_size); 30721da177e4SLinus Torvalds return 0; 30731da177e4SLinus Torvalds } 30741da177e4SLinus Torvalds 30751da177e4SLinus Torvalds /* 30761da177e4SLinus Torvalds * SECTION: ioctl functions for eckd devices. 30771da177e4SLinus Torvalds */ 30781da177e4SLinus Torvalds 30791da177e4SLinus Torvalds /* 30801da177e4SLinus Torvalds * Release device ioctl. 30811da177e4SLinus Torvalds * Buils a channel programm to releases a prior reserved 30821da177e4SLinus Torvalds * (see dasd_eckd_reserve) device. 30831da177e4SLinus Torvalds */ 30841da177e4SLinus Torvalds static int 30851107ccfbSChristoph Hellwig dasd_eckd_release(struct dasd_device *device) 30861da177e4SLinus Torvalds { 30871da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 30881da177e4SLinus Torvalds int rc; 3089f3eb5384SStefan Weinhuber struct ccw1 *ccw; 3090f932bceaSStefan Weinhuber int useglobal; 30911da177e4SLinus Torvalds 30921da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 30931da177e4SLinus Torvalds return -EACCES; 30941da177e4SLinus Torvalds 3095f932bceaSStefan Weinhuber useglobal = 0; 309668b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 30971da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3098f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3099f932bceaSStefan Weinhuber useglobal = 1; 3100f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3101f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3102f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3103f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3104f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3105f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3106f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 31071da177e4SLinus Torvalds } 3108f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 3109f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RELEASE; 3110f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3111f3eb5384SStefan Weinhuber ccw->count = 32; 3112f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 31138e09f215SStefan Weinhuber cqr->startdev = device; 31148e09f215SStefan Weinhuber cqr->memdev = device; 31151da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 31161c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3117336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 31181da177e4SLinus Torvalds cqr->expires = 2 * HZ; 31191da177e4SLinus Torvalds cqr->buildclk = get_clock(); 31201da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 31211da177e4SLinus Torvalds 31221da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 31235a27e60dSStefan Weinhuber if (!rc) 31245a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 31251da177e4SLinus Torvalds 3126f932bceaSStefan Weinhuber if (useglobal) 3127f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3128f932bceaSStefan Weinhuber else 31298e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 31301da177e4SLinus Torvalds return rc; 31311da177e4SLinus Torvalds } 31321da177e4SLinus Torvalds 31331da177e4SLinus Torvalds /* 31341da177e4SLinus Torvalds * Reserve device ioctl. 31351da177e4SLinus Torvalds * Options are set to 'synchronous wait for interrupt' and 31361da177e4SLinus Torvalds * 'timeout the request'. This leads to a terminate IO if 31371da177e4SLinus Torvalds * the interrupt is outstanding for a certain time. 31381da177e4SLinus Torvalds */ 31391da177e4SLinus Torvalds static int 31401107ccfbSChristoph Hellwig dasd_eckd_reserve(struct dasd_device *device) 31411da177e4SLinus Torvalds { 31421da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 31431da177e4SLinus Torvalds int rc; 3144f3eb5384SStefan Weinhuber struct ccw1 *ccw; 3145f932bceaSStefan Weinhuber int useglobal; 31461da177e4SLinus Torvalds 31471da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 31481da177e4SLinus Torvalds return -EACCES; 31491da177e4SLinus Torvalds 3150f932bceaSStefan Weinhuber useglobal = 0; 315168b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 31521da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3153f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3154f932bceaSStefan Weinhuber useglobal = 1; 3155f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3156f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3157f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3158f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3159f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3160f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3161f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 31621da177e4SLinus Torvalds } 3163f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 3164f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RESERVE; 3165f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3166f3eb5384SStefan Weinhuber ccw->count = 32; 3167f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 31688e09f215SStefan Weinhuber cqr->startdev = device; 31698e09f215SStefan Weinhuber cqr->memdev = device; 31701da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 31711c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3172336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 31731da177e4SLinus Torvalds cqr->expires = 2 * HZ; 31741da177e4SLinus Torvalds cqr->buildclk = get_clock(); 31751da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 31761da177e4SLinus Torvalds 31771da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 31785a27e60dSStefan Weinhuber if (!rc) 31795a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 31801da177e4SLinus Torvalds 3181f932bceaSStefan Weinhuber if (useglobal) 3182f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3183f932bceaSStefan Weinhuber else 31848e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 31851da177e4SLinus Torvalds return rc; 31861da177e4SLinus Torvalds } 31871da177e4SLinus Torvalds 31881da177e4SLinus Torvalds /* 31891da177e4SLinus Torvalds * Steal lock ioctl - unconditional reserve device. 31901da177e4SLinus Torvalds * Buils a channel programm to break a device's reservation. 31911da177e4SLinus Torvalds * (unconditional reserve) 31921da177e4SLinus Torvalds */ 31931da177e4SLinus Torvalds static int 31941107ccfbSChristoph Hellwig dasd_eckd_steal_lock(struct dasd_device *device) 31951da177e4SLinus Torvalds { 31961da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 31971da177e4SLinus Torvalds int rc; 3198f3eb5384SStefan Weinhuber struct ccw1 *ccw; 3199f932bceaSStefan Weinhuber int useglobal; 32001da177e4SLinus Torvalds 32011da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 32021da177e4SLinus Torvalds return -EACCES; 32031da177e4SLinus Torvalds 3204f932bceaSStefan Weinhuber useglobal = 0; 320568b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 32061da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3207f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3208f932bceaSStefan Weinhuber useglobal = 1; 3209f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3210f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3211f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3212f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3213f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3214f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3215f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 32161da177e4SLinus Torvalds } 3217f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 3218f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SLCK; 3219f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3220f3eb5384SStefan Weinhuber ccw->count = 32; 3221f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 32228e09f215SStefan Weinhuber cqr->startdev = device; 32238e09f215SStefan Weinhuber cqr->memdev = device; 32241da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 32251c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3226336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 32271da177e4SLinus Torvalds cqr->expires = 2 * HZ; 32281da177e4SLinus Torvalds cqr->buildclk = get_clock(); 32291da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 32301da177e4SLinus Torvalds 32311da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 32325a27e60dSStefan Weinhuber if (!rc) 32335a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 32341da177e4SLinus Torvalds 3235f932bceaSStefan Weinhuber if (useglobal) 3236f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3237f932bceaSStefan Weinhuber else 32388e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 32391da177e4SLinus Torvalds return rc; 32401da177e4SLinus Torvalds } 32411da177e4SLinus Torvalds 32421da177e4SLinus Torvalds /* 3243196339f1SStefan Weinhuber * SNID - Sense Path Group ID 3244196339f1SStefan Weinhuber * This ioctl may be used in situations where I/O is stalled due to 3245196339f1SStefan Weinhuber * a reserve, so if the normal dasd_smalloc_request fails, we use the 3246196339f1SStefan Weinhuber * preallocated dasd_reserve_req. 3247196339f1SStefan Weinhuber */ 3248196339f1SStefan Weinhuber static int dasd_eckd_snid(struct dasd_device *device, 3249196339f1SStefan Weinhuber void __user *argp) 3250196339f1SStefan Weinhuber { 3251196339f1SStefan Weinhuber struct dasd_ccw_req *cqr; 3252196339f1SStefan Weinhuber int rc; 3253196339f1SStefan Weinhuber struct ccw1 *ccw; 3254196339f1SStefan Weinhuber int useglobal; 3255196339f1SStefan Weinhuber struct dasd_snid_ioctl_data usrparm; 3256196339f1SStefan Weinhuber 3257196339f1SStefan Weinhuber if (!capable(CAP_SYS_ADMIN)) 3258196339f1SStefan Weinhuber return -EACCES; 3259196339f1SStefan Weinhuber 3260196339f1SStefan Weinhuber if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 3261196339f1SStefan Weinhuber return -EFAULT; 3262196339f1SStefan Weinhuber 3263196339f1SStefan Weinhuber useglobal = 0; 3264196339f1SStefan Weinhuber cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 3265196339f1SStefan Weinhuber sizeof(struct dasd_snid_data), device); 3266196339f1SStefan Weinhuber if (IS_ERR(cqr)) { 3267196339f1SStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3268196339f1SStefan Weinhuber useglobal = 1; 3269196339f1SStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3270196339f1SStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3271196339f1SStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3272196339f1SStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3273196339f1SStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3274196339f1SStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3275196339f1SStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 3276196339f1SStefan Weinhuber } 3277196339f1SStefan Weinhuber ccw = cqr->cpaddr; 3278196339f1SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SNID; 3279196339f1SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3280196339f1SStefan Weinhuber ccw->count = 12; 3281196339f1SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 3282196339f1SStefan Weinhuber cqr->startdev = device; 3283196339f1SStefan Weinhuber cqr->memdev = device; 3284196339f1SStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3285196339f1SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 32865a27e60dSStefan Weinhuber set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 3287196339f1SStefan Weinhuber cqr->retries = 5; 3288196339f1SStefan Weinhuber cqr->expires = 10 * HZ; 3289196339f1SStefan Weinhuber cqr->buildclk = get_clock(); 3290196339f1SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 3291196339f1SStefan Weinhuber cqr->lpm = usrparm.path_mask; 3292196339f1SStefan Weinhuber 3293196339f1SStefan Weinhuber rc = dasd_sleep_on_immediatly(cqr); 3294196339f1SStefan Weinhuber /* verify that I/O processing didn't modify the path mask */ 3295196339f1SStefan Weinhuber if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) 3296196339f1SStefan Weinhuber rc = -EIO; 3297196339f1SStefan Weinhuber if (!rc) { 3298196339f1SStefan Weinhuber usrparm.data = *((struct dasd_snid_data *)cqr->data); 3299196339f1SStefan Weinhuber if (copy_to_user(argp, &usrparm, sizeof(usrparm))) 3300196339f1SStefan Weinhuber rc = -EFAULT; 3301196339f1SStefan Weinhuber } 3302196339f1SStefan Weinhuber 3303196339f1SStefan Weinhuber if (useglobal) 3304196339f1SStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3305196339f1SStefan Weinhuber else 3306196339f1SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 3307196339f1SStefan Weinhuber return rc; 3308196339f1SStefan Weinhuber } 3309196339f1SStefan Weinhuber 3310196339f1SStefan Weinhuber /* 33111da177e4SLinus Torvalds * Read performance statistics 33121da177e4SLinus Torvalds */ 33131da177e4SLinus Torvalds static int 33141107ccfbSChristoph Hellwig dasd_eckd_performance(struct dasd_device *device, void __user *argp) 33151da177e4SLinus Torvalds { 33161da177e4SLinus Torvalds struct dasd_psf_prssd_data *prssdp; 33171da177e4SLinus Torvalds struct dasd_rssd_perf_stats_t *stats; 33181da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 33191da177e4SLinus Torvalds struct ccw1 *ccw; 33201da177e4SLinus Torvalds int rc; 33211da177e4SLinus Torvalds 332268b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 33231da177e4SLinus Torvalds (sizeof(struct dasd_psf_prssd_data) + 33241da177e4SLinus Torvalds sizeof(struct dasd_rssd_perf_stats_t)), 33251da177e4SLinus Torvalds device); 33261da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3327fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 33281da177e4SLinus Torvalds "Could not allocate initialization request"); 33291da177e4SLinus Torvalds return PTR_ERR(cqr); 33301da177e4SLinus Torvalds } 33318e09f215SStefan Weinhuber cqr->startdev = device; 33328e09f215SStefan Weinhuber cqr->memdev = device; 33331da177e4SLinus Torvalds cqr->retries = 0; 3334eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 33351da177e4SLinus Torvalds cqr->expires = 10 * HZ; 33361da177e4SLinus Torvalds 33371da177e4SLinus Torvalds /* Prepare for Read Subsystem Data */ 33381da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 33391da177e4SLinus Torvalds memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 33401da177e4SLinus Torvalds prssdp->order = PSF_ORDER_PRSSD; 33415d67d164SJoe Perches prssdp->suborder = 0x01; /* Performance Statistics */ 33421da177e4SLinus Torvalds prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 33431da177e4SLinus Torvalds 33441da177e4SLinus Torvalds ccw = cqr->cpaddr; 33451da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_PSF; 33461da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_psf_prssd_data); 33471da177e4SLinus Torvalds ccw->flags |= CCW_FLAG_CC; 33481da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) prssdp; 33491da177e4SLinus Torvalds 33501da177e4SLinus Torvalds /* Read Subsystem Data - Performance Statistics */ 33511da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 33521da177e4SLinus Torvalds memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 33531da177e4SLinus Torvalds 33541da177e4SLinus Torvalds ccw++; 33551da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_RSSD; 33561da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 33571da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) stats; 33581da177e4SLinus Torvalds 33591da177e4SLinus Torvalds cqr->buildclk = get_clock(); 33601da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 33611da177e4SLinus Torvalds rc = dasd_sleep_on(cqr); 33621da177e4SLinus Torvalds if (rc == 0) { 33631da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 33641da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 33651107ccfbSChristoph Hellwig if (copy_to_user(argp, stats, 33661107ccfbSChristoph Hellwig sizeof(struct dasd_rssd_perf_stats_t))) 33671107ccfbSChristoph Hellwig rc = -EFAULT; 33681da177e4SLinus Torvalds } 33698e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 33701da177e4SLinus Torvalds return rc; 33711da177e4SLinus Torvalds } 33721da177e4SLinus Torvalds 33731da177e4SLinus Torvalds /* 33741da177e4SLinus Torvalds * Get attributes (cache operations) 33751da177e4SLinus Torvalds * Returnes the cache attributes used in Define Extend (DE). 33761da177e4SLinus Torvalds */ 33771da177e4SLinus Torvalds static int 33781107ccfbSChristoph Hellwig dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 33791da177e4SLinus Torvalds { 33801107ccfbSChristoph Hellwig struct dasd_eckd_private *private = 33811107ccfbSChristoph Hellwig (struct dasd_eckd_private *)device->private; 33821107ccfbSChristoph Hellwig struct attrib_data_t attrib = private->attrib; 33831da177e4SLinus Torvalds int rc; 33841da177e4SLinus Torvalds 33851da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 33861da177e4SLinus Torvalds return -EACCES; 33871107ccfbSChristoph Hellwig if (!argp) 33881da177e4SLinus Torvalds return -EINVAL; 33891da177e4SLinus Torvalds 33901107ccfbSChristoph Hellwig rc = 0; 33911107ccfbSChristoph Hellwig if (copy_to_user(argp, (long *) &attrib, 33921107ccfbSChristoph Hellwig sizeof(struct attrib_data_t))) 33931107ccfbSChristoph Hellwig rc = -EFAULT; 33941da177e4SLinus Torvalds 33951da177e4SLinus Torvalds return rc; 33961da177e4SLinus Torvalds } 33971da177e4SLinus Torvalds 33981da177e4SLinus Torvalds /* 33991da177e4SLinus Torvalds * Set attributes (cache operations) 34001da177e4SLinus Torvalds * Stores the attributes for cache operation to be used in Define Extend (DE). 34011da177e4SLinus Torvalds */ 34021da177e4SLinus Torvalds static int 34031107ccfbSChristoph Hellwig dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 34041da177e4SLinus Torvalds { 34051107ccfbSChristoph Hellwig struct dasd_eckd_private *private = 34061107ccfbSChristoph Hellwig (struct dasd_eckd_private *)device->private; 34071da177e4SLinus Torvalds struct attrib_data_t attrib; 34081da177e4SLinus Torvalds 34091da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 34101da177e4SLinus Torvalds return -EACCES; 34111107ccfbSChristoph Hellwig if (!argp) 34121da177e4SLinus Torvalds return -EINVAL; 34131da177e4SLinus Torvalds 34141107ccfbSChristoph Hellwig if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 34151da177e4SLinus Torvalds return -EFAULT; 34161da177e4SLinus Torvalds private->attrib = attrib; 34171da177e4SLinus Torvalds 3418fc19f381SStefan Haberland dev_info(&device->cdev->dev, 3419fc19f381SStefan Haberland "The DASD cache mode was set to %x (%i cylinder prestage)\n", 34201da177e4SLinus Torvalds private->attrib.operation, private->attrib.nr_cyl); 34211da177e4SLinus Torvalds return 0; 34221da177e4SLinus Torvalds } 34231da177e4SLinus Torvalds 3424ab1d848fSNigel Hislop /* 3425ab1d848fSNigel Hislop * Issue syscall I/O to EMC Symmetrix array. 3426ab1d848fSNigel Hislop * CCWs are PSF and RSSD 3427ab1d848fSNigel Hislop */ 3428ab1d848fSNigel Hislop static int dasd_symm_io(struct dasd_device *device, void __user *argp) 3429ab1d848fSNigel Hislop { 3430ab1d848fSNigel Hislop struct dasd_symmio_parms usrparm; 3431ab1d848fSNigel Hislop char *psf_data, *rssd_result; 3432ab1d848fSNigel Hislop struct dasd_ccw_req *cqr; 3433ab1d848fSNigel Hislop struct ccw1 *ccw; 343452898025SNigel Hislop char psf0, psf1; 3435ab1d848fSNigel Hislop int rc; 3436ab1d848fSNigel Hislop 343752898025SNigel Hislop if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) 343852898025SNigel Hislop return -EACCES; 343952898025SNigel Hislop psf0 = psf1 = 0; 344052898025SNigel Hislop 3441ab1d848fSNigel Hislop /* Copy parms from caller */ 3442ab1d848fSNigel Hislop rc = -EFAULT; 3443ab1d848fSNigel Hislop if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 3444ab1d848fSNigel Hislop goto out; 3445f8b06859SHeiko Carstens if (is_compat_task() || sizeof(long) == 4) { 3446ab1d848fSNigel Hislop /* Make sure pointers are sane even on 31 bit. */ 3447ab1d848fSNigel Hislop rc = -EINVAL; 3448f8b06859SHeiko Carstens if ((usrparm.psf_data >> 32) != 0) 3449ab1d848fSNigel Hislop goto out; 3450f8b06859SHeiko Carstens if ((usrparm.rssd_result >> 32) != 0) 3451f8b06859SHeiko Carstens goto out; 3452f8b06859SHeiko Carstens usrparm.psf_data &= 0x7fffffffULL; 3453f8b06859SHeiko Carstens usrparm.rssd_result &= 0x7fffffffULL; 3454ab1d848fSNigel Hislop } 3455ab1d848fSNigel Hislop /* alloc I/O data area */ 3456ab1d848fSNigel Hislop psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 3457ab1d848fSNigel Hislop rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 3458ab1d848fSNigel Hislop if (!psf_data || !rssd_result) { 3459ab1d848fSNigel Hislop rc = -ENOMEM; 3460ab1d848fSNigel Hislop goto out_free; 3461ab1d848fSNigel Hislop } 3462ab1d848fSNigel Hislop 3463ab1d848fSNigel Hislop /* get syscall header from user space */ 3464ab1d848fSNigel Hislop rc = -EFAULT; 3465ab1d848fSNigel Hislop if (copy_from_user(psf_data, 3466ab1d848fSNigel Hislop (void __user *)(unsigned long) usrparm.psf_data, 3467ab1d848fSNigel Hislop usrparm.psf_data_len)) 3468ab1d848fSNigel Hislop goto out_free; 346952898025SNigel Hislop psf0 = psf_data[0]; 347052898025SNigel Hislop psf1 = psf_data[1]; 3471ab1d848fSNigel Hislop 3472ab1d848fSNigel Hislop /* setup CCWs for PSF + RSSD */ 347368b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device); 3474ab1d848fSNigel Hislop if (IS_ERR(cqr)) { 3475fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3476ab1d848fSNigel Hislop "Could not allocate initialization request"); 3477ab1d848fSNigel Hislop rc = PTR_ERR(cqr); 3478ab1d848fSNigel Hislop goto out_free; 3479ab1d848fSNigel Hislop } 3480ab1d848fSNigel Hislop 3481ab1d848fSNigel Hislop cqr->startdev = device; 3482ab1d848fSNigel Hislop cqr->memdev = device; 3483ab1d848fSNigel Hislop cqr->retries = 3; 3484ab1d848fSNigel Hislop cqr->expires = 10 * HZ; 3485ab1d848fSNigel Hislop cqr->buildclk = get_clock(); 3486ab1d848fSNigel Hislop cqr->status = DASD_CQR_FILLED; 3487ab1d848fSNigel Hislop 3488ab1d848fSNigel Hislop /* Build the ccws */ 3489ab1d848fSNigel Hislop ccw = cqr->cpaddr; 3490ab1d848fSNigel Hislop 3491ab1d848fSNigel Hislop /* PSF ccw */ 3492ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_PSF; 3493ab1d848fSNigel Hislop ccw->count = usrparm.psf_data_len; 3494ab1d848fSNigel Hislop ccw->flags |= CCW_FLAG_CC; 3495ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) psf_data; 3496ab1d848fSNigel Hislop 3497ab1d848fSNigel Hislop ccw++; 3498ab1d848fSNigel Hislop 3499ab1d848fSNigel Hislop /* RSSD ccw */ 3500ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_RSSD; 3501ab1d848fSNigel Hislop ccw->count = usrparm.rssd_result_len; 3502ab1d848fSNigel Hislop ccw->flags = CCW_FLAG_SLI ; 3503ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) rssd_result; 3504ab1d848fSNigel Hislop 3505ab1d848fSNigel Hislop rc = dasd_sleep_on(cqr); 3506ab1d848fSNigel Hislop if (rc) 3507ab1d848fSNigel Hislop goto out_sfree; 3508ab1d848fSNigel Hislop 3509ab1d848fSNigel Hislop rc = -EFAULT; 3510ab1d848fSNigel Hislop if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 3511ab1d848fSNigel Hislop rssd_result, usrparm.rssd_result_len)) 3512ab1d848fSNigel Hislop goto out_sfree; 3513ab1d848fSNigel Hislop rc = 0; 3514ab1d848fSNigel Hislop 3515ab1d848fSNigel Hislop out_sfree: 3516ab1d848fSNigel Hislop dasd_sfree_request(cqr, cqr->memdev); 3517ab1d848fSNigel Hislop out_free: 3518ab1d848fSNigel Hislop kfree(rssd_result); 3519ab1d848fSNigel Hislop kfree(psf_data); 3520ab1d848fSNigel Hislop out: 352152898025SNigel Hislop DBF_DEV_EVENT(DBF_WARNING, device, 352252898025SNigel Hislop "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", 352352898025SNigel Hislop (int) psf0, (int) psf1, rc); 3524ab1d848fSNigel Hislop return rc; 3525ab1d848fSNigel Hislop } 3526ab1d848fSNigel Hislop 35271107ccfbSChristoph Hellwig static int 35288e09f215SStefan Weinhuber dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 35291107ccfbSChristoph Hellwig { 35308e09f215SStefan Weinhuber struct dasd_device *device = block->base; 35318e09f215SStefan Weinhuber 35321107ccfbSChristoph Hellwig switch (cmd) { 35331107ccfbSChristoph Hellwig case BIODASDGATTR: 35341107ccfbSChristoph Hellwig return dasd_eckd_get_attrib(device, argp); 35351107ccfbSChristoph Hellwig case BIODASDSATTR: 35361107ccfbSChristoph Hellwig return dasd_eckd_set_attrib(device, argp); 35371107ccfbSChristoph Hellwig case BIODASDPSRD: 35381107ccfbSChristoph Hellwig return dasd_eckd_performance(device, argp); 35391107ccfbSChristoph Hellwig case BIODASDRLSE: 35401107ccfbSChristoph Hellwig return dasd_eckd_release(device); 35411107ccfbSChristoph Hellwig case BIODASDRSRV: 35421107ccfbSChristoph Hellwig return dasd_eckd_reserve(device); 35431107ccfbSChristoph Hellwig case BIODASDSLCK: 35441107ccfbSChristoph Hellwig return dasd_eckd_steal_lock(device); 3545196339f1SStefan Weinhuber case BIODASDSNID: 3546196339f1SStefan Weinhuber return dasd_eckd_snid(device, argp); 3547ab1d848fSNigel Hislop case BIODASDSYMMIO: 3548ab1d848fSNigel Hislop return dasd_symm_io(device, argp); 35491107ccfbSChristoph Hellwig default: 35501107ccfbSChristoph Hellwig return -ENOIOCTLCMD; 35511107ccfbSChristoph Hellwig } 35521107ccfbSChristoph Hellwig } 35531107ccfbSChristoph Hellwig 35541da177e4SLinus Torvalds /* 3555445b5b49SHorst Hummel * Dump the range of CCWs into 'page' buffer 3556445b5b49SHorst Hummel * and return number of printed chars. 3557445b5b49SHorst Hummel */ 35584d284cacSHeiko Carstens static int 3559445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 3560445b5b49SHorst Hummel { 3561445b5b49SHorst Hummel int len, count; 3562445b5b49SHorst Hummel char *datap; 3563445b5b49SHorst Hummel 3564445b5b49SHorst Hummel len = 0; 3565445b5b49SHorst Hummel while (from <= to) { 3566445b5b49SHorst Hummel len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3567445b5b49SHorst Hummel " CCW %p: %08X %08X DAT:", 3568445b5b49SHorst Hummel from, ((int *) from)[0], ((int *) from)[1]); 3569445b5b49SHorst Hummel 3570445b5b49SHorst Hummel /* get pointer to data (consider IDALs) */ 3571445b5b49SHorst Hummel if (from->flags & CCW_FLAG_IDA) 3572445b5b49SHorst Hummel datap = (char *) *((addr_t *) (addr_t) from->cda); 3573445b5b49SHorst Hummel else 3574445b5b49SHorst Hummel datap = (char *) ((addr_t) from->cda); 3575445b5b49SHorst Hummel 3576445b5b49SHorst Hummel /* dump data (max 32 bytes) */ 3577445b5b49SHorst Hummel for (count = 0; count < from->count && count < 32; count++) { 3578445b5b49SHorst Hummel if (count % 8 == 0) len += sprintf(page + len, " "); 3579445b5b49SHorst Hummel if (count % 4 == 0) len += sprintf(page + len, " "); 3580445b5b49SHorst Hummel len += sprintf(page + len, "%02x", datap[count]); 3581445b5b49SHorst Hummel } 3582445b5b49SHorst Hummel len += sprintf(page + len, "\n"); 3583445b5b49SHorst Hummel from++; 3584445b5b49SHorst Hummel } 3585445b5b49SHorst Hummel return len; 3586445b5b49SHorst Hummel } 3587445b5b49SHorst Hummel 3588fc19f381SStefan Haberland static void 3589aeec92caSStefan Haberland dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 3590aeec92caSStefan Haberland char *reason) 3591fc19f381SStefan Haberland { 3592fc19f381SStefan Haberland u64 *sense; 3593a5a0061fSStefan Weinhuber u64 *stat; 3594fc19f381SStefan Haberland 3595aeec92caSStefan Haberland sense = (u64 *) dasd_get_sense(irb); 3596a5a0061fSStefan Weinhuber stat = (u64 *) &irb->scsw; 3597fc19f381SStefan Haberland if (sense) { 3598a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " 3599a5a0061fSStefan Weinhuber "%016llx %016llx %016llx %016llx", 3600a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 3601ed3640b2SStefan Haberland sense[0], sense[1], sense[2], sense[3]); 3602fc19f381SStefan Haberland } else { 3603a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", 3604a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 3605a5a0061fSStefan Weinhuber "NO VALID SENSE"); 3606fc19f381SStefan Haberland } 3607fc19f381SStefan Haberland } 3608fc19f381SStefan Haberland 3609445b5b49SHorst Hummel /* 36101da177e4SLinus Torvalds * Print sense data and related channel program. 36111da177e4SLinus Torvalds * Parts are printed because printk buffer is only 1024 bytes. 36121da177e4SLinus Torvalds */ 3613f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 36148e09f215SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 36151da177e4SLinus Torvalds { 36161da177e4SLinus Torvalds char *page; 3617445b5b49SHorst Hummel struct ccw1 *first, *last, *fail, *from, *to; 3618445b5b49SHorst Hummel int len, sl, sct; 36191da177e4SLinus Torvalds 36201da177e4SLinus Torvalds page = (char *) get_zeroed_page(GFP_ATOMIC); 36211da177e4SLinus Torvalds if (page == NULL) { 3622fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3623fc19f381SStefan Haberland "No memory to dump sense data\n"); 36241da177e4SLinus Torvalds return; 36251da177e4SLinus Torvalds } 3626445b5b49SHorst Hummel /* dump the sense data */ 36271da177e4SLinus Torvalds len = sprintf(page, KERN_ERR PRINTK_HEADER 36281da177e4SLinus Torvalds " I/O status report for device %s:\n", 36292a0217d5SKay Sievers dev_name(&device->cdev->dev)); 36301da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3631a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 3632a5a0061fSStefan Weinhuber "CS:%02X RC:%d\n", 3633a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 3634a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 3635a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 3636a5a0061fSStefan Weinhuber req ? req->intrc : 0); 36371da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 36381da177e4SLinus Torvalds " device %s: Failing CCW: %p\n", 36392a0217d5SKay Sievers dev_name(&device->cdev->dev), 364023d805b6SPeter Oberparleiter (void *) (addr_t) irb->scsw.cmd.cpa); 36411da177e4SLinus Torvalds if (irb->esw.esw0.erw.cons) { 36421da177e4SLinus Torvalds for (sl = 0; sl < 4; sl++) { 36431da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 36441da177e4SLinus Torvalds " Sense(hex) %2d-%2d:", 36451da177e4SLinus Torvalds (8 * sl), ((8 * sl) + 7)); 36461da177e4SLinus Torvalds 36471da177e4SLinus Torvalds for (sct = 0; sct < 8; sct++) { 36481da177e4SLinus Torvalds len += sprintf(page + len, " %02x", 36491da177e4SLinus Torvalds irb->ecw[8 * sl + sct]); 36501da177e4SLinus Torvalds } 36511da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 36521da177e4SLinus Torvalds } 36531da177e4SLinus Torvalds 36541da177e4SLinus Torvalds if (irb->ecw[27] & DASD_SENSE_BIT_0) { 36551da177e4SLinus Torvalds /* 24 Byte Sense Data */ 3656445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 36571da177e4SLinus Torvalds " 24 Byte: %x MSG %x, " 36581da177e4SLinus Torvalds "%s MSGb to SYSOP\n", 36591da177e4SLinus Torvalds irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 36601da177e4SLinus Torvalds irb->ecw[1] & 0x10 ? "" : "no"); 36611da177e4SLinus Torvalds } else { 36621da177e4SLinus Torvalds /* 32 Byte Sense Data */ 3663445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 36641da177e4SLinus Torvalds " 32 Byte: Format: %x " 36651da177e4SLinus Torvalds "Exception class %x\n", 36661da177e4SLinus Torvalds irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 36671da177e4SLinus Torvalds } 36681da177e4SLinus Torvalds } else { 3669445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 36701da177e4SLinus Torvalds " SORRY - NO VALID SENSE AVAILABLE\n"); 36711da177e4SLinus Torvalds } 3672445b5b49SHorst Hummel printk("%s", page); 36731da177e4SLinus Torvalds 36748e09f215SStefan Weinhuber if (req) { 36758e09f215SStefan Weinhuber /* req == NULL for unsolicited interrupts */ 3676445b5b49SHorst Hummel /* dump the Channel Program (max 140 Bytes per line) */ 3677445b5b49SHorst Hummel /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 3678445b5b49SHorst Hummel first = req->cpaddr; 3679445b5b49SHorst Hummel for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 3680445b5b49SHorst Hummel to = min(first + 6, last); 36811da177e4SLinus Torvalds len = sprintf(page, KERN_ERR PRINTK_HEADER 36821da177e4SLinus Torvalds " Related CP in req: %p\n", req); 3683445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(first, to, page + len); 3684445b5b49SHorst Hummel printk("%s", page); 36851da177e4SLinus Torvalds 3686445b5b49SHorst Hummel /* print failing CCW area (maximum 4) */ 3687445b5b49SHorst Hummel /* scsw->cda is either valid or zero */ 36881da177e4SLinus Torvalds len = 0; 3689445b5b49SHorst Hummel from = ++to; 369023d805b6SPeter Oberparleiter fail = (struct ccw1 *)(addr_t) 369123d805b6SPeter Oberparleiter irb->scsw.cmd.cpa; /* failing CCW */ 3692445b5b49SHorst Hummel if (from < fail - 2) { 3693445b5b49SHorst Hummel from = fail - 2; /* there is a gap - print header */ 3694445b5b49SHorst Hummel len += sprintf(page, KERN_ERR PRINTK_HEADER "......\n"); 36951da177e4SLinus Torvalds } 3696445b5b49SHorst Hummel to = min(fail + 1, last); 3697445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, to, page + len); 36981da177e4SLinus Torvalds 3699445b5b49SHorst Hummel /* print last CCWs (maximum 2) */ 3700445b5b49SHorst Hummel from = max(from, ++to); 3701445b5b49SHorst Hummel if (from < last - 1) { 3702445b5b49SHorst Hummel from = last - 1; /* there is a gap - print header */ 37031da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n"); 37041da177e4SLinus Torvalds } 3705445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, last, page + len); 37061da177e4SLinus Torvalds if (len > 0) 3707445b5b49SHorst Hummel printk("%s", page); 37088e09f215SStefan Weinhuber } 37091da177e4SLinus Torvalds free_page((unsigned long) page); 37101da177e4SLinus Torvalds } 37111da177e4SLinus Torvalds 3712f3eb5384SStefan Weinhuber 3713f3eb5384SStefan Weinhuber /* 3714f3eb5384SStefan Weinhuber * Print sense data from a tcw. 3715f3eb5384SStefan Weinhuber */ 3716f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 3717f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 3718f3eb5384SStefan Weinhuber { 3719f3eb5384SStefan Weinhuber char *page; 3720f3eb5384SStefan Weinhuber int len, sl, sct, residual; 3721f3eb5384SStefan Weinhuber struct tsb *tsb; 3722ef19298bSStefan Weinhuber u8 *sense, *rcq; 3723f3eb5384SStefan Weinhuber 3724f3eb5384SStefan Weinhuber page = (char *) get_zeroed_page(GFP_ATOMIC); 3725f3eb5384SStefan Weinhuber if (page == NULL) { 3726fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, " %s", 3727f3eb5384SStefan Weinhuber "No memory to dump sense data"); 3728f3eb5384SStefan Weinhuber return; 3729f3eb5384SStefan Weinhuber } 3730f3eb5384SStefan Weinhuber /* dump the sense data */ 3731f3eb5384SStefan Weinhuber len = sprintf(page, KERN_ERR PRINTK_HEADER 3732f3eb5384SStefan Weinhuber " I/O status report for device %s:\n", 3733f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev)); 3734f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3735a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 3736a5a0061fSStefan Weinhuber "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", 3737a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 3738a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 3739a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 3740a5a0061fSStefan Weinhuber irb->scsw.tm.fcxs, irb->scsw.tm.schxs, 3741a5a0061fSStefan Weinhuber req ? req->intrc : 0); 3742f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3743f3eb5384SStefan Weinhuber " device %s: Failing TCW: %p\n", 3744f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev), 3745f3eb5384SStefan Weinhuber (void *) (addr_t) irb->scsw.tm.tcw); 3746f3eb5384SStefan Weinhuber 3747f3eb5384SStefan Weinhuber tsb = NULL; 3748f3eb5384SStefan Weinhuber sense = NULL; 3749a5a0061fSStefan Weinhuber if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) 3750f3eb5384SStefan Weinhuber tsb = tcw_get_tsb( 3751f3eb5384SStefan Weinhuber (struct tcw *)(unsigned long)irb->scsw.tm.tcw); 3752f3eb5384SStefan Weinhuber 3753b8fde722SStefan Haberland if (tsb) { 3754f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3755f3eb5384SStefan Weinhuber " tsb->length %d\n", tsb->length); 3756f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3757f3eb5384SStefan Weinhuber " tsb->flags %x\n", tsb->flags); 3758f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3759f3eb5384SStefan Weinhuber " tsb->dcw_offset %d\n", tsb->dcw_offset); 3760f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3761f3eb5384SStefan Weinhuber " tsb->count %d\n", tsb->count); 3762f3eb5384SStefan Weinhuber residual = tsb->count - 28; 3763f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3764f3eb5384SStefan Weinhuber " residual %d\n", residual); 3765f3eb5384SStefan Weinhuber 3766f3eb5384SStefan Weinhuber switch (tsb->flags & 0x07) { 3767f3eb5384SStefan Weinhuber case 1: /* tsa_iostat */ 3768f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3769f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_time %d\n", 3770f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_time); 3771f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3772f3eb5384SStefan Weinhuber " tsb->tsa.iostat.def_time %d\n", 3773f3eb5384SStefan Weinhuber tsb->tsa.iostat.def_time); 3774f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3775f3eb5384SStefan Weinhuber " tsb->tsa.iostat.queue_time %d\n", 3776f3eb5384SStefan Weinhuber tsb->tsa.iostat.queue_time); 3777f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3778f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_busy_time %d\n", 3779f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_busy_time); 3780f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3781f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_act_time %d\n", 3782f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_act_time); 3783f3eb5384SStefan Weinhuber sense = tsb->tsa.iostat.sense; 3784f3eb5384SStefan Weinhuber break; 3785f3eb5384SStefan Weinhuber case 2: /* ts_ddpc */ 3786f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3787f3eb5384SStefan Weinhuber " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); 3788ef19298bSStefan Weinhuber for (sl = 0; sl < 2; sl++) { 3789ef19298bSStefan Weinhuber len += sprintf(page + len, 3790ef19298bSStefan Weinhuber KERN_ERR PRINTK_HEADER 3791ef19298bSStefan Weinhuber " tsb->tsa.ddpc.rcq %2d-%2d: ", 3792ef19298bSStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 3793ef19298bSStefan Weinhuber rcq = tsb->tsa.ddpc.rcq; 3794f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 3795f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 3796ef19298bSStefan Weinhuber rcq[8 * sl + sct]); 3797f3eb5384SStefan Weinhuber } 3798f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 3799f3eb5384SStefan Weinhuber } 3800f3eb5384SStefan Weinhuber sense = tsb->tsa.ddpc.sense; 3801f3eb5384SStefan Weinhuber break; 3802f3eb5384SStefan Weinhuber case 3: /* tsa_intrg */ 3803f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3804f3eb5384SStefan Weinhuber " tsb->tsa.intrg.: not supportet yet \n"); 3805f3eb5384SStefan Weinhuber break; 3806f3eb5384SStefan Weinhuber } 3807f3eb5384SStefan Weinhuber 3808f3eb5384SStefan Weinhuber if (sense) { 3809f3eb5384SStefan Weinhuber for (sl = 0; sl < 4; sl++) { 3810f3eb5384SStefan Weinhuber len += sprintf(page + len, 3811f3eb5384SStefan Weinhuber KERN_ERR PRINTK_HEADER 3812f3eb5384SStefan Weinhuber " Sense(hex) %2d-%2d:", 3813f3eb5384SStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 3814f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 3815f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 3816f3eb5384SStefan Weinhuber sense[8 * sl + sct]); 3817f3eb5384SStefan Weinhuber } 3818f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 3819f3eb5384SStefan Weinhuber } 3820f3eb5384SStefan Weinhuber 3821f3eb5384SStefan Weinhuber if (sense[27] & DASD_SENSE_BIT_0) { 3822f3eb5384SStefan Weinhuber /* 24 Byte Sense Data */ 3823f3eb5384SStefan Weinhuber sprintf(page + len, KERN_ERR PRINTK_HEADER 3824f3eb5384SStefan Weinhuber " 24 Byte: %x MSG %x, " 3825f3eb5384SStefan Weinhuber "%s MSGb to SYSOP\n", 3826f3eb5384SStefan Weinhuber sense[7] >> 4, sense[7] & 0x0f, 3827f3eb5384SStefan Weinhuber sense[1] & 0x10 ? "" : "no"); 3828f3eb5384SStefan Weinhuber } else { 3829f3eb5384SStefan Weinhuber /* 32 Byte Sense Data */ 3830f3eb5384SStefan Weinhuber sprintf(page + len, KERN_ERR PRINTK_HEADER 3831f3eb5384SStefan Weinhuber " 32 Byte: Format: %x " 3832f3eb5384SStefan Weinhuber "Exception class %x\n", 3833f3eb5384SStefan Weinhuber sense[6] & 0x0f, sense[22] >> 4); 3834f3eb5384SStefan Weinhuber } 3835f3eb5384SStefan Weinhuber } else { 3836f3eb5384SStefan Weinhuber sprintf(page + len, KERN_ERR PRINTK_HEADER 3837f3eb5384SStefan Weinhuber " SORRY - NO VALID SENSE AVAILABLE\n"); 3838f3eb5384SStefan Weinhuber } 3839f3eb5384SStefan Weinhuber } else { 3840f3eb5384SStefan Weinhuber sprintf(page + len, KERN_ERR PRINTK_HEADER 3841f3eb5384SStefan Weinhuber " SORRY - NO TSB DATA AVAILABLE\n"); 3842f3eb5384SStefan Weinhuber } 3843f3eb5384SStefan Weinhuber printk("%s", page); 3844f3eb5384SStefan Weinhuber free_page((unsigned long) page); 3845f3eb5384SStefan Weinhuber } 3846f3eb5384SStefan Weinhuber 3847f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense(struct dasd_device *device, 3848f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 3849f3eb5384SStefan Weinhuber { 3850a5a0061fSStefan Weinhuber if (scsw_is_tm(&irb->scsw)) 3851f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_tcw(device, req, irb); 3852f3eb5384SStefan Weinhuber else 3853f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_ccw(device, req, irb); 3854f3eb5384SStefan Weinhuber } 3855f3eb5384SStefan Weinhuber 3856501183f2SStefan Haberland static int dasd_eckd_pm_freeze(struct dasd_device *device) 3857d41dd122SStefan Haberland { 3858d41dd122SStefan Haberland /* 3859d41dd122SStefan Haberland * the device should be disconnected from our LCU structure 3860d41dd122SStefan Haberland * on restore we will reconnect it and reread LCU specific 3861d41dd122SStefan Haberland * information like PAV support that might have changed 3862d41dd122SStefan Haberland */ 3863d41dd122SStefan Haberland dasd_alias_remove_device(device); 3864d41dd122SStefan Haberland dasd_alias_disconnect_device_from_lcu(device); 3865d41dd122SStefan Haberland 3866d41dd122SStefan Haberland return 0; 3867d41dd122SStefan Haberland } 3868d41dd122SStefan Haberland 3869501183f2SStefan Haberland static int dasd_eckd_restore_device(struct dasd_device *device) 3870d41dd122SStefan Haberland { 3871d41dd122SStefan Haberland struct dasd_eckd_private *private; 38726fca97a9SStefan Haberland struct dasd_eckd_characteristics temp_rdc_data; 3873d41dd122SStefan Haberland int is_known, rc; 3874d41dd122SStefan Haberland struct dasd_uid temp_uid; 3875a7602f6cSStefan Haberland unsigned long flags; 3876d41dd122SStefan Haberland 3877d41dd122SStefan Haberland private = (struct dasd_eckd_private *) device->private; 3878d41dd122SStefan Haberland 3879d41dd122SStefan Haberland /* Read Configuration Data */ 3880d41dd122SStefan Haberland rc = dasd_eckd_read_conf(device); 3881d41dd122SStefan Haberland if (rc) 3882d41dd122SStefan Haberland goto out_err; 3883d41dd122SStefan Haberland 38842dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 38852dedf0d9SStefan Haberland /* Generate device unique id */ 38862dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 38872dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 3888d41dd122SStefan Haberland if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) 3889a7602f6cSStefan Haberland dev_err(&device->cdev->dev, "The UID of the DASD has " 3890a7602f6cSStefan Haberland "changed\n"); 38912dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 3892d41dd122SStefan Haberland if (rc) 3893d41dd122SStefan Haberland goto out_err; 3894d41dd122SStefan Haberland 3895d41dd122SStefan Haberland /* register lcu with alias handling, enable PAV if this is a new lcu */ 3896d41dd122SStefan Haberland is_known = dasd_alias_make_device_known_to_lcu(device); 3897d41dd122SStefan Haberland if (is_known < 0) 3898d41dd122SStefan Haberland return is_known; 3899d41dd122SStefan Haberland if (!is_known) { 3900f4ac1d02SStefan Weinhuber dasd_eckd_validate_server(device); 3901f4ac1d02SStefan Weinhuber dasd_alias_lcu_setup_complete(device); 3902f4ac1d02SStefan Weinhuber } else 3903f4ac1d02SStefan Weinhuber dasd_alias_wait_for_lcu_setup(device); 3904f4ac1d02SStefan Weinhuber 3905f4ac1d02SStefan Weinhuber /* RE-Read Configuration Data */ 3906f4ac1d02SStefan Weinhuber rc = dasd_eckd_read_conf(device); 3907d41dd122SStefan Haberland if (rc) 3908d41dd122SStefan Haberland goto out_err; 3909d41dd122SStefan Haberland 3910d41dd122SStefan Haberland /* Read Feature Codes */ 391168d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 3912d41dd122SStefan Haberland 3913d41dd122SStefan Haberland /* Read Device Characteristics */ 391468b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 39156fca97a9SStefan Haberland &temp_rdc_data, 64); 3916d41dd122SStefan Haberland if (rc) { 3917b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 3918b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 3919d41dd122SStefan Haberland goto out_err; 3920d41dd122SStefan Haberland } 3921a7602f6cSStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 39226fca97a9SStefan Haberland memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data)); 3923a7602f6cSStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 3924d41dd122SStefan Haberland 3925d41dd122SStefan Haberland /* add device to alias management */ 3926d41dd122SStefan Haberland dasd_alias_add_device(device); 3927d41dd122SStefan Haberland 3928d41dd122SStefan Haberland return 0; 3929d41dd122SStefan Haberland 3930d41dd122SStefan Haberland out_err: 3931e6125fbaSStefan Haberland return -1; 3932d41dd122SStefan Haberland } 3933d41dd122SStefan Haberland 3934501183f2SStefan Haberland static int dasd_eckd_reload_device(struct dasd_device *device) 3935501183f2SStefan Haberland { 3936501183f2SStefan Haberland struct dasd_eckd_private *private; 3937501183f2SStefan Haberland int rc, old_base; 39382dedf0d9SStefan Haberland char print_uid[60]; 39392dedf0d9SStefan Haberland struct dasd_uid uid; 39402dedf0d9SStefan Haberland unsigned long flags; 3941501183f2SStefan Haberland 3942501183f2SStefan Haberland private = (struct dasd_eckd_private *) device->private; 39432dedf0d9SStefan Haberland 39442dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 3945501183f2SStefan Haberland old_base = private->uid.base_unit_addr; 39462dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 39472dedf0d9SStefan Haberland 3948501183f2SStefan Haberland /* Read Configuration Data */ 3949501183f2SStefan Haberland rc = dasd_eckd_read_conf(device); 3950501183f2SStefan Haberland if (rc) 3951501183f2SStefan Haberland goto out_err; 3952501183f2SStefan Haberland 39532dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 3954501183f2SStefan Haberland if (rc) 3955501183f2SStefan Haberland goto out_err; 3956501183f2SStefan Haberland /* 3957501183f2SStefan Haberland * update unit address configuration and 3958501183f2SStefan Haberland * add device to alias management 3959501183f2SStefan Haberland */ 3960501183f2SStefan Haberland dasd_alias_update_add_device(device); 3961501183f2SStefan Haberland 39622dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &uid); 39632dedf0d9SStefan Haberland 39642dedf0d9SStefan Haberland if (old_base != uid.base_unit_addr) { 39652dedf0d9SStefan Haberland if (strlen(uid.vduit) > 0) 39662dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 39672dedf0d9SStefan Haberland "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial, 39682dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr, uid.vduit); 3969501183f2SStefan Haberland else 39702dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 39712dedf0d9SStefan Haberland "%s.%s.%04x.%02x", uid.vendor, uid.serial, 39722dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr); 3973501183f2SStefan Haberland 3974501183f2SStefan Haberland dev_info(&device->cdev->dev, 3975501183f2SStefan Haberland "An Alias device was reassigned to a new base device " 39762dedf0d9SStefan Haberland "with UID: %s\n", print_uid); 3977501183f2SStefan Haberland } 3978501183f2SStefan Haberland return 0; 3979501183f2SStefan Haberland 3980501183f2SStefan Haberland out_err: 3981501183f2SStefan Haberland return -1; 3982501183f2SStefan Haberland } 3983501183f2SStefan Haberland 3984d41dd122SStefan Haberland static struct ccw_driver dasd_eckd_driver = { 39853bda058bSSebastian Ott .driver = { 3986d41dd122SStefan Haberland .name = "dasd-eckd", 3987d41dd122SStefan Haberland .owner = THIS_MODULE, 39883bda058bSSebastian Ott }, 3989d41dd122SStefan Haberland .ids = dasd_eckd_ids, 3990d41dd122SStefan Haberland .probe = dasd_eckd_probe, 3991d41dd122SStefan Haberland .remove = dasd_generic_remove, 3992d41dd122SStefan Haberland .set_offline = dasd_generic_set_offline, 3993d41dd122SStefan Haberland .set_online = dasd_eckd_set_online, 3994d41dd122SStefan Haberland .notify = dasd_generic_notify, 3995a4d26c6aSStefan Weinhuber .path_event = dasd_generic_path_event, 3996d41dd122SStefan Haberland .freeze = dasd_generic_pm_freeze, 3997d41dd122SStefan Haberland .thaw = dasd_generic_restore_device, 3998d41dd122SStefan Haberland .restore = dasd_generic_restore_device, 3999a23ed009SStefan Haberland .uc_handler = dasd_generic_uc_handler, 4000d41dd122SStefan Haberland }; 4001f3eb5384SStefan Weinhuber 40021da177e4SLinus Torvalds /* 40031da177e4SLinus Torvalds * max_blocks is dependent on the amount of storage that is available 40041da177e4SLinus Torvalds * in the static io buffer for each device. Currently each device has 40051da177e4SLinus Torvalds * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has 40061da177e4SLinus Torvalds * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use 40071da177e4SLinus Torvalds * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In 40081da177e4SLinus Torvalds * addition we have one define extent ccw + 16 bytes of data and one 40091da177e4SLinus Torvalds * locate record ccw + 16 bytes of data. That makes: 40101da177e4SLinus Torvalds * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. 40111da177e4SLinus Torvalds * We want to fit two into the available memory so that we can immediately 40121da177e4SLinus Torvalds * start the next request if one finishes off. That makes 249.5 blocks 40131da177e4SLinus Torvalds * for one request. Give a little safety and the result is 240. 40141da177e4SLinus Torvalds */ 40151da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline = { 40161da177e4SLinus Torvalds .owner = THIS_MODULE, 40171da177e4SLinus Torvalds .name = "ECKD", 40181da177e4SLinus Torvalds .ebcname = "ECKD", 4019ef19298bSStefan Weinhuber .max_blocks = 190, 40201da177e4SLinus Torvalds .check_device = dasd_eckd_check_characteristics, 40218e09f215SStefan Weinhuber .uncheck_device = dasd_eckd_uncheck_device, 40221da177e4SLinus Torvalds .do_analysis = dasd_eckd_do_analysis, 4023a4d26c6aSStefan Weinhuber .verify_path = dasd_eckd_verify_path, 40248e09f215SStefan Weinhuber .ready_to_online = dasd_eckd_ready_to_online, 40258e09f215SStefan Weinhuber .online_to_ready = dasd_eckd_online_to_ready, 40261da177e4SLinus Torvalds .fill_geometry = dasd_eckd_fill_geometry, 40271da177e4SLinus Torvalds .start_IO = dasd_start_IO, 40281da177e4SLinus Torvalds .term_IO = dasd_term_IO, 40298e09f215SStefan Weinhuber .handle_terminated_request = dasd_eckd_handle_terminated_request, 40301da177e4SLinus Torvalds .format_device = dasd_eckd_format_device, 40311da177e4SLinus Torvalds .erp_action = dasd_eckd_erp_action, 40321da177e4SLinus Torvalds .erp_postaction = dasd_eckd_erp_postaction, 40335a27e60dSStefan Weinhuber .check_for_device_change = dasd_eckd_check_for_device_change, 40348e09f215SStefan Weinhuber .build_cp = dasd_eckd_build_alias_cp, 40358e09f215SStefan Weinhuber .free_cp = dasd_eckd_free_alias_cp, 40361da177e4SLinus Torvalds .dump_sense = dasd_eckd_dump_sense, 4037fc19f381SStefan Haberland .dump_sense_dbf = dasd_eckd_dump_sense_dbf, 40381da177e4SLinus Torvalds .fill_info = dasd_eckd_fill_info, 40391107ccfbSChristoph Hellwig .ioctl = dasd_eckd_ioctl, 4040d41dd122SStefan Haberland .freeze = dasd_eckd_pm_freeze, 4041d41dd122SStefan Haberland .restore = dasd_eckd_restore_device, 4042501183f2SStefan Haberland .reload = dasd_eckd_reload_device, 40432dedf0d9SStefan Haberland .get_uid = dasd_eckd_get_uid, 40441da177e4SLinus Torvalds }; 40451da177e4SLinus Torvalds 40461da177e4SLinus Torvalds static int __init 40471da177e4SLinus Torvalds dasd_eckd_init(void) 40481da177e4SLinus Torvalds { 4049736e6ea0SSebastian Ott int ret; 4050736e6ea0SSebastian Ott 40511da177e4SLinus Torvalds ASCEBC(dasd_eckd_discipline.ebcname, 4); 4052f932bceaSStefan Weinhuber dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), 4053f932bceaSStefan Weinhuber GFP_KERNEL | GFP_DMA); 4054f932bceaSStefan Weinhuber if (!dasd_reserve_req) 4055f932bceaSStefan Weinhuber return -ENOMEM; 4056a4d26c6aSStefan Weinhuber path_verification_worker = kmalloc(sizeof(*path_verification_worker), 4057a4d26c6aSStefan Weinhuber GFP_KERNEL | GFP_DMA); 4058a4d26c6aSStefan Weinhuber if (!path_verification_worker) { 4059a4d26c6aSStefan Weinhuber kfree(dasd_reserve_req); 4060a4d26c6aSStefan Weinhuber return -ENOMEM; 4061a4d26c6aSStefan Weinhuber } 4062736e6ea0SSebastian Ott ret = ccw_driver_register(&dasd_eckd_driver); 4063736e6ea0SSebastian Ott if (!ret) 4064736e6ea0SSebastian Ott wait_for_device_probe(); 4065a4d26c6aSStefan Weinhuber else { 4066a4d26c6aSStefan Weinhuber kfree(path_verification_worker); 4067f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 4068a4d26c6aSStefan Weinhuber } 4069736e6ea0SSebastian Ott return ret; 40701da177e4SLinus Torvalds } 40711da177e4SLinus Torvalds 40721da177e4SLinus Torvalds static void __exit 40731da177e4SLinus Torvalds dasd_eckd_cleanup(void) 40741da177e4SLinus Torvalds { 40751da177e4SLinus Torvalds ccw_driver_unregister(&dasd_eckd_driver); 4076a4d26c6aSStefan Weinhuber kfree(path_verification_worker); 4077f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 40781da177e4SLinus Torvalds } 40791da177e4SLinus Torvalds 40801da177e4SLinus Torvalds module_init(dasd_eckd_init); 40811da177e4SLinus Torvalds module_exit(dasd_eckd_cleanup); 4082