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 8475915a873SStefan Haberland /* 8485915a873SStefan Haberland * Wakeup helper for read_conf 8495915a873SStefan Haberland * if the cqr is not done and needs some error recovery 8505915a873SStefan Haberland * the buffer has to be re-initialized with the EBCDIC "V1.0" 8515915a873SStefan Haberland * to show support for virtual device SNEQ 8525915a873SStefan Haberland */ 8535915a873SStefan Haberland static void read_conf_cb(struct dasd_ccw_req *cqr, void *data) 8545915a873SStefan Haberland { 8555915a873SStefan Haberland struct ccw1 *ccw; 8565915a873SStefan Haberland __u8 *rcd_buffer; 8575915a873SStefan Haberland 8585915a873SStefan Haberland if (cqr->status != DASD_CQR_DONE) { 8595915a873SStefan Haberland ccw = cqr->cpaddr; 8605915a873SStefan Haberland rcd_buffer = (__u8 *)((addr_t) ccw->cda); 8615915a873SStefan Haberland memset(rcd_buffer, 0, sizeof(*rcd_buffer)); 8625915a873SStefan Haberland 8635915a873SStefan Haberland rcd_buffer[0] = 0xE5; 8645915a873SStefan Haberland rcd_buffer[1] = 0xF1; 8655915a873SStefan Haberland rcd_buffer[2] = 0x4B; 8665915a873SStefan Haberland rcd_buffer[3] = 0xF0; 8675915a873SStefan Haberland } 8685915a873SStefan Haberland dasd_wakeup_cb(cqr, data); 8695915a873SStefan Haberland } 8705915a873SStefan Haberland 871a4d26c6aSStefan Weinhuber static int dasd_eckd_read_conf_immediately(struct dasd_device *device, 872a4d26c6aSStefan Weinhuber struct dasd_ccw_req *cqr, 873a4d26c6aSStefan Weinhuber __u8 *rcd_buffer, 874a4d26c6aSStefan Weinhuber __u8 lpm) 875a4d26c6aSStefan Weinhuber { 876a4d26c6aSStefan Weinhuber struct ciw *ciw; 877a4d26c6aSStefan Weinhuber int rc; 878a4d26c6aSStefan Weinhuber /* 879a4d26c6aSStefan Weinhuber * sanity check: scan for RCD command in extended SenseID data 880a4d26c6aSStefan Weinhuber * some devices do not support RCD 881a4d26c6aSStefan Weinhuber */ 882a4d26c6aSStefan Weinhuber ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 883a4d26c6aSStefan Weinhuber if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) 884a4d26c6aSStefan Weinhuber return -EOPNOTSUPP; 885a4d26c6aSStefan Weinhuber 886a4d26c6aSStefan Weinhuber dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm); 887a4d26c6aSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 8885a27e60dSStefan Weinhuber set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 889a4d26c6aSStefan Weinhuber cqr->retries = 5; 8905915a873SStefan Haberland cqr->callback = read_conf_cb; 891a4d26c6aSStefan Weinhuber rc = dasd_sleep_on_immediatly(cqr); 892a4d26c6aSStefan Weinhuber return rc; 89317283b56SCornelia Huck } 89417283b56SCornelia Huck 89517283b56SCornelia Huck static int dasd_eckd_read_conf_lpm(struct dasd_device *device, 89617283b56SCornelia Huck void **rcd_buffer, 89717283b56SCornelia Huck int *rcd_buffer_size, __u8 lpm) 89817283b56SCornelia Huck { 89917283b56SCornelia Huck struct ciw *ciw; 90017283b56SCornelia Huck char *rcd_buf = NULL; 90117283b56SCornelia Huck int ret; 90217283b56SCornelia Huck struct dasd_ccw_req *cqr; 90317283b56SCornelia Huck 90417283b56SCornelia Huck /* 905a4d26c6aSStefan Weinhuber * sanity check: scan for RCD command in extended SenseID data 906a4d26c6aSStefan Weinhuber * some devices do not support RCD 90717283b56SCornelia Huck */ 90817283b56SCornelia Huck ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 909a4d26c6aSStefan Weinhuber if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) { 91017283b56SCornelia Huck ret = -EOPNOTSUPP; 91117283b56SCornelia Huck goto out_error; 91217283b56SCornelia Huck } 913a4d26c6aSStefan Weinhuber rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA); 91417283b56SCornelia Huck if (!rcd_buf) { 91517283b56SCornelia Huck ret = -ENOMEM; 91617283b56SCornelia Huck goto out_error; 91717283b56SCornelia Huck } 918a4d26c6aSStefan Weinhuber cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, 919a4d26c6aSStefan Weinhuber 0, /* use rcd_buf as data ara */ 920a4d26c6aSStefan Weinhuber device); 92117283b56SCornelia Huck if (IS_ERR(cqr)) { 922a4d26c6aSStefan Weinhuber DBF_DEV_EVENT(DBF_WARNING, device, "%s", 923a4d26c6aSStefan Weinhuber "Could not allocate RCD request"); 924a4d26c6aSStefan Weinhuber ret = -ENOMEM; 92517283b56SCornelia Huck goto out_error; 92617283b56SCornelia Huck } 927a4d26c6aSStefan Weinhuber dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm); 9285915a873SStefan Haberland cqr->callback = read_conf_cb; 92917283b56SCornelia Huck ret = dasd_sleep_on(cqr); 93017283b56SCornelia Huck /* 93117283b56SCornelia Huck * on success we update the user input parms 93217283b56SCornelia Huck */ 9338e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 93417283b56SCornelia Huck if (ret) 93517283b56SCornelia Huck goto out_error; 93617283b56SCornelia Huck 937a4d26c6aSStefan Weinhuber *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE; 93817283b56SCornelia Huck *rcd_buffer = rcd_buf; 93917283b56SCornelia Huck return 0; 94017283b56SCornelia Huck out_error: 94117283b56SCornelia Huck kfree(rcd_buf); 94217283b56SCornelia Huck *rcd_buffer = NULL; 94317283b56SCornelia Huck *rcd_buffer_size = 0; 94417283b56SCornelia Huck return ret; 94517283b56SCornelia Huck } 94617283b56SCornelia Huck 9474abb08c2SStefan Weinhuber static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private) 9484abb08c2SStefan Weinhuber { 9494abb08c2SStefan Weinhuber 9504abb08c2SStefan Weinhuber struct dasd_sneq *sneq; 9514abb08c2SStefan Weinhuber int i, count; 9524abb08c2SStefan Weinhuber 9534abb08c2SStefan Weinhuber private->ned = NULL; 9544abb08c2SStefan Weinhuber private->sneq = NULL; 9554abb08c2SStefan Weinhuber private->vdsneq = NULL; 9564abb08c2SStefan Weinhuber private->gneq = NULL; 9574abb08c2SStefan Weinhuber count = private->conf_len / sizeof(struct dasd_sneq); 9584abb08c2SStefan Weinhuber sneq = (struct dasd_sneq *)private->conf_data; 9594abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 9604abb08c2SStefan Weinhuber if (sneq->flags.identifier == 1 && sneq->format == 1) 9614abb08c2SStefan Weinhuber private->sneq = sneq; 9624abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 1 && sneq->format == 4) 9634abb08c2SStefan Weinhuber private->vdsneq = (struct vd_sneq *)sneq; 9644abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 2) 9654abb08c2SStefan Weinhuber private->gneq = (struct dasd_gneq *)sneq; 9664abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 3 && sneq->res1 == 1) 9674abb08c2SStefan Weinhuber private->ned = (struct dasd_ned *)sneq; 9684abb08c2SStefan Weinhuber sneq++; 9694abb08c2SStefan Weinhuber } 9704abb08c2SStefan Weinhuber if (!private->ned || !private->gneq) { 9714abb08c2SStefan Weinhuber private->ned = NULL; 9724abb08c2SStefan Weinhuber private->sneq = NULL; 9734abb08c2SStefan Weinhuber private->vdsneq = NULL; 9744abb08c2SStefan Weinhuber private->gneq = NULL; 9754abb08c2SStefan Weinhuber return -EINVAL; 9764abb08c2SStefan Weinhuber } 9774abb08c2SStefan Weinhuber return 0; 9784abb08c2SStefan Weinhuber 9794abb08c2SStefan Weinhuber }; 9804abb08c2SStefan Weinhuber 9814abb08c2SStefan Weinhuber static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len) 9824abb08c2SStefan Weinhuber { 9834abb08c2SStefan Weinhuber struct dasd_gneq *gneq; 9844abb08c2SStefan Weinhuber int i, count, found; 9854abb08c2SStefan Weinhuber 9864abb08c2SStefan Weinhuber count = conf_len / sizeof(*gneq); 9874abb08c2SStefan Weinhuber gneq = (struct dasd_gneq *)conf_data; 9884abb08c2SStefan Weinhuber found = 0; 9894abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 9904abb08c2SStefan Weinhuber if (gneq->flags.identifier == 2) { 9914abb08c2SStefan Weinhuber found = 1; 9924abb08c2SStefan Weinhuber break; 9934abb08c2SStefan Weinhuber } 9944abb08c2SStefan Weinhuber gneq++; 9954abb08c2SStefan Weinhuber } 9964abb08c2SStefan Weinhuber if (found) 9974abb08c2SStefan Weinhuber return ((char *)gneq)[18] & 0x07; 9984abb08c2SStefan Weinhuber else 9994abb08c2SStefan Weinhuber return 0; 10004abb08c2SStefan Weinhuber } 10014abb08c2SStefan Weinhuber 10024abb08c2SStefan Weinhuber static int dasd_eckd_read_conf(struct dasd_device *device) 10031da177e4SLinus Torvalds { 10041da177e4SLinus Torvalds void *conf_data; 10051da177e4SLinus Torvalds int conf_len, conf_data_saved; 10061da177e4SLinus Torvalds int rc; 1007a4d26c6aSStefan Weinhuber __u8 lpm, opm; 10081da177e4SLinus Torvalds struct dasd_eckd_private *private; 1009a4d26c6aSStefan Weinhuber struct dasd_path *path_data; 10101da177e4SLinus Torvalds 10111da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 1012a4d26c6aSStefan Weinhuber path_data = &device->path_data; 1013a4d26c6aSStefan Weinhuber opm = ccw_device_get_path_mask(device->cdev); 10141da177e4SLinus Torvalds lpm = 0x80; 10151da177e4SLinus Torvalds conf_data_saved = 0; 10161da177e4SLinus Torvalds /* get configuration data per operational path */ 10171da177e4SLinus Torvalds for (lpm = 0x80; lpm; lpm>>= 1) { 1018a4d26c6aSStefan Weinhuber if (lpm & opm) { 101917283b56SCornelia Huck rc = dasd_eckd_read_conf_lpm(device, &conf_data, 10201da177e4SLinus Torvalds &conf_len, lpm); 10211da177e4SLinus Torvalds if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ 1022b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 10231da177e4SLinus Torvalds "Read configuration data returned " 1024b8ed5dd5SStefan Haberland "error %d", rc); 10251da177e4SLinus Torvalds return rc; 10261da177e4SLinus Torvalds } 10271da177e4SLinus Torvalds if (conf_data == NULL) { 1028b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1029b8ed5dd5SStefan Haberland "No configuration data " 1030b8ed5dd5SStefan Haberland "retrieved"); 1031a4d26c6aSStefan Weinhuber /* no further analysis possible */ 1032a4d26c6aSStefan Weinhuber path_data->opm |= lpm; 1033d133a960SGabriel Craciunescu continue; /* no error */ 10341da177e4SLinus Torvalds } 10351da177e4SLinus Torvalds /* save first valid configuration data */ 10361da177e4SLinus Torvalds if (!conf_data_saved) { 10374abb08c2SStefan Weinhuber kfree(private->conf_data); 10384abb08c2SStefan Weinhuber private->conf_data = conf_data; 10394abb08c2SStefan Weinhuber private->conf_len = conf_len; 10404abb08c2SStefan Weinhuber if (dasd_eckd_identify_conf_parts(private)) { 10414abb08c2SStefan Weinhuber private->conf_data = NULL; 10424abb08c2SStefan Weinhuber private->conf_len = 0; 10434abb08c2SStefan Weinhuber kfree(conf_data); 10444abb08c2SStefan Weinhuber continue; 10454abb08c2SStefan Weinhuber } 10461da177e4SLinus Torvalds conf_data_saved++; 10471da177e4SLinus Torvalds } 10484abb08c2SStefan Weinhuber switch (dasd_eckd_path_access(conf_data, conf_len)) { 10491da177e4SLinus Torvalds case 0x02: 10501da177e4SLinus Torvalds path_data->npm |= lpm; 10511da177e4SLinus Torvalds break; 10521da177e4SLinus Torvalds case 0x03: 10531da177e4SLinus Torvalds path_data->ppm |= lpm; 10541da177e4SLinus Torvalds break; 10551da177e4SLinus Torvalds } 1056a4d26c6aSStefan Weinhuber path_data->opm |= lpm; 10574abb08c2SStefan Weinhuber if (conf_data != private->conf_data) 10581da177e4SLinus Torvalds kfree(conf_data); 10591da177e4SLinus Torvalds } 10601da177e4SLinus Torvalds } 10611da177e4SLinus Torvalds return 0; 10621da177e4SLinus Torvalds } 10631da177e4SLinus Torvalds 1064a4d26c6aSStefan Weinhuber static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm) 1065a4d26c6aSStefan Weinhuber { 1066a4d26c6aSStefan Weinhuber struct dasd_eckd_private *private; 1067a4d26c6aSStefan Weinhuber int mdc; 1068a4d26c6aSStefan Weinhuber u32 fcx_max_data; 1069a4d26c6aSStefan Weinhuber 1070a4d26c6aSStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 1071a4d26c6aSStefan Weinhuber if (private->fcx_max_data) { 1072a4d26c6aSStefan Weinhuber mdc = ccw_device_get_mdc(device->cdev, lpm); 1073a4d26c6aSStefan Weinhuber if ((mdc < 0)) { 1074a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1075a4d26c6aSStefan Weinhuber "Detecting the maximum data size for zHPF " 1076a4d26c6aSStefan Weinhuber "requests failed (rc=%d) for a new path %x\n", 1077a4d26c6aSStefan Weinhuber mdc, lpm); 1078a4d26c6aSStefan Weinhuber return mdc; 1079a4d26c6aSStefan Weinhuber } 1080a4d26c6aSStefan Weinhuber fcx_max_data = mdc * FCX_MAX_DATA_FACTOR; 1081a4d26c6aSStefan Weinhuber if (fcx_max_data < private->fcx_max_data) { 1082a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1083a4d26c6aSStefan Weinhuber "The maximum data size for zHPF requests %u " 1084a4d26c6aSStefan Weinhuber "on a new path %x is below the active maximum " 1085a4d26c6aSStefan Weinhuber "%u\n", fcx_max_data, lpm, 1086a4d26c6aSStefan Weinhuber private->fcx_max_data); 1087a4d26c6aSStefan Weinhuber return -EACCES; 1088a4d26c6aSStefan Weinhuber } 1089a4d26c6aSStefan Weinhuber } 1090a4d26c6aSStefan Weinhuber return 0; 1091a4d26c6aSStefan Weinhuber } 1092a4d26c6aSStefan Weinhuber 1093a4d26c6aSStefan Weinhuber static void do_path_verification_work(struct work_struct *work) 1094a4d26c6aSStefan Weinhuber { 1095a4d26c6aSStefan Weinhuber struct path_verification_work_data *data; 1096a4d26c6aSStefan Weinhuber struct dasd_device *device; 1097a4d26c6aSStefan Weinhuber __u8 lpm, opm, npm, ppm, epm; 1098a4d26c6aSStefan Weinhuber unsigned long flags; 1099a4d26c6aSStefan Weinhuber int rc; 1100a4d26c6aSStefan Weinhuber 1101a4d26c6aSStefan Weinhuber data = container_of(work, struct path_verification_work_data, worker); 1102a4d26c6aSStefan Weinhuber device = data->device; 1103a4d26c6aSStefan Weinhuber 1104a4d26c6aSStefan Weinhuber opm = 0; 1105a4d26c6aSStefan Weinhuber npm = 0; 1106a4d26c6aSStefan Weinhuber ppm = 0; 1107a4d26c6aSStefan Weinhuber epm = 0; 1108a4d26c6aSStefan Weinhuber for (lpm = 0x80; lpm; lpm >>= 1) { 1109a4d26c6aSStefan Weinhuber if (lpm & data->tbvpm) { 1110a4d26c6aSStefan Weinhuber memset(data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1111a4d26c6aSStefan Weinhuber memset(&data->cqr, 0, sizeof(data->cqr)); 1112a4d26c6aSStefan Weinhuber data->cqr.cpaddr = &data->ccw; 1113a4d26c6aSStefan Weinhuber rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1114a4d26c6aSStefan Weinhuber data->rcd_buffer, 1115a4d26c6aSStefan Weinhuber lpm); 1116a4d26c6aSStefan Weinhuber if (!rc) { 1117a4d26c6aSStefan Weinhuber switch (dasd_eckd_path_access(data->rcd_buffer, 1118a4d26c6aSStefan Weinhuber DASD_ECKD_RCD_DATA_SIZE)) { 1119a4d26c6aSStefan Weinhuber case 0x02: 1120a4d26c6aSStefan Weinhuber npm |= lpm; 1121a4d26c6aSStefan Weinhuber break; 1122a4d26c6aSStefan Weinhuber case 0x03: 1123a4d26c6aSStefan Weinhuber ppm |= lpm; 1124a4d26c6aSStefan Weinhuber break; 1125a4d26c6aSStefan Weinhuber } 1126a4d26c6aSStefan Weinhuber opm |= lpm; 1127a4d26c6aSStefan Weinhuber } else if (rc == -EOPNOTSUPP) { 1128a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1129a4d26c6aSStefan Weinhuber "path verification: No configuration " 1130a4d26c6aSStefan Weinhuber "data retrieved"); 1131a4d26c6aSStefan Weinhuber opm |= lpm; 1132a4d26c6aSStefan Weinhuber } else if (rc == -EAGAIN) { 1133a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1134a4d26c6aSStefan Weinhuber "path verification: device is stopped," 1135a4d26c6aSStefan Weinhuber " try again later"); 1136a4d26c6aSStefan Weinhuber epm |= lpm; 1137a4d26c6aSStefan Weinhuber } else { 1138a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1139a4d26c6aSStefan Weinhuber "Reading device feature codes failed " 1140a4d26c6aSStefan Weinhuber "(rc=%d) for new path %x\n", rc, lpm); 1141a4d26c6aSStefan Weinhuber continue; 1142a4d26c6aSStefan Weinhuber } 1143a4d26c6aSStefan Weinhuber if (verify_fcx_max_data(device, lpm)) { 1144a4d26c6aSStefan Weinhuber opm &= ~lpm; 1145a4d26c6aSStefan Weinhuber npm &= ~lpm; 1146a4d26c6aSStefan Weinhuber ppm &= ~lpm; 1147a4d26c6aSStefan Weinhuber } 1148a4d26c6aSStefan Weinhuber } 1149a4d26c6aSStefan Weinhuber } 1150a4d26c6aSStefan Weinhuber /* 1151a4d26c6aSStefan Weinhuber * There is a small chance that a path is lost again between 1152a4d26c6aSStefan Weinhuber * above path verification and the following modification of 1153a4d26c6aSStefan Weinhuber * the device opm mask. We could avoid that race here by using 1154a4d26c6aSStefan Weinhuber * yet another path mask, but we rather deal with this unlikely 1155a4d26c6aSStefan Weinhuber * situation in dasd_start_IO. 1156a4d26c6aSStefan Weinhuber */ 1157a4d26c6aSStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1158a4d26c6aSStefan Weinhuber if (!device->path_data.opm && opm) { 1159a4d26c6aSStefan Weinhuber device->path_data.opm = opm; 1160a4d26c6aSStefan Weinhuber dasd_generic_path_operational(device); 1161a4d26c6aSStefan Weinhuber } else 1162a4d26c6aSStefan Weinhuber device->path_data.opm |= opm; 1163a4d26c6aSStefan Weinhuber device->path_data.npm |= npm; 1164a4d26c6aSStefan Weinhuber device->path_data.ppm |= ppm; 1165a4d26c6aSStefan Weinhuber device->path_data.tbvpm |= epm; 1166a4d26c6aSStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1167a4d26c6aSStefan Weinhuber 1168a4d26c6aSStefan Weinhuber dasd_put_device(device); 1169a4d26c6aSStefan Weinhuber if (data->isglobal) 1170a4d26c6aSStefan Weinhuber mutex_unlock(&dasd_path_verification_mutex); 1171a4d26c6aSStefan Weinhuber else 1172a4d26c6aSStefan Weinhuber kfree(data); 1173a4d26c6aSStefan Weinhuber } 1174a4d26c6aSStefan Weinhuber 1175a4d26c6aSStefan Weinhuber static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm) 1176a4d26c6aSStefan Weinhuber { 1177a4d26c6aSStefan Weinhuber struct path_verification_work_data *data; 1178a4d26c6aSStefan Weinhuber 1179a4d26c6aSStefan Weinhuber data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA); 1180a4d26c6aSStefan Weinhuber if (!data) { 1181a4d26c6aSStefan Weinhuber if (mutex_trylock(&dasd_path_verification_mutex)) { 1182a4d26c6aSStefan Weinhuber data = path_verification_worker; 1183a4d26c6aSStefan Weinhuber data->isglobal = 1; 1184a4d26c6aSStefan Weinhuber } else 1185a4d26c6aSStefan Weinhuber return -ENOMEM; 1186a4d26c6aSStefan Weinhuber } else { 1187a4d26c6aSStefan Weinhuber memset(data, 0, sizeof(*data)); 1188a4d26c6aSStefan Weinhuber data->isglobal = 0; 1189a4d26c6aSStefan Weinhuber } 1190a4d26c6aSStefan Weinhuber INIT_WORK(&data->worker, do_path_verification_work); 1191a4d26c6aSStefan Weinhuber dasd_get_device(device); 1192a4d26c6aSStefan Weinhuber data->device = device; 1193a4d26c6aSStefan Weinhuber data->tbvpm = lpm; 1194a4d26c6aSStefan Weinhuber schedule_work(&data->worker); 1195a4d26c6aSStefan Weinhuber return 0; 1196a4d26c6aSStefan Weinhuber } 1197a4d26c6aSStefan Weinhuber 11988e09f215SStefan Weinhuber static int dasd_eckd_read_features(struct dasd_device *device) 11998e09f215SStefan Weinhuber { 12008e09f215SStefan Weinhuber struct dasd_psf_prssd_data *prssdp; 12018e09f215SStefan Weinhuber struct dasd_rssd_features *features; 12028e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 12038e09f215SStefan Weinhuber struct ccw1 *ccw; 12048e09f215SStefan Weinhuber int rc; 12058e09f215SStefan Weinhuber struct dasd_eckd_private *private; 12068e09f215SStefan Weinhuber 12078e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 120868d1e5f0SStefan Weinhuber memset(&private->features, 0, sizeof(struct dasd_rssd_features)); 120968b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 12108e09f215SStefan Weinhuber (sizeof(struct dasd_psf_prssd_data) + 12118e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)), 12128e09f215SStefan Weinhuber device); 12138e09f215SStefan Weinhuber if (IS_ERR(cqr)) { 1214b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " 1215b8ed5dd5SStefan Haberland "allocate initialization request"); 12168e09f215SStefan Weinhuber return PTR_ERR(cqr); 12178e09f215SStefan Weinhuber } 12188e09f215SStefan Weinhuber cqr->startdev = device; 12198e09f215SStefan Weinhuber cqr->memdev = device; 12208e09f215SStefan Weinhuber cqr->block = NULL; 1221eb6e199bSStefan Weinhuber cqr->retries = 256; 12228e09f215SStefan Weinhuber cqr->expires = 10 * HZ; 12238e09f215SStefan Weinhuber 12248e09f215SStefan Weinhuber /* Prepare for Read Subsystem Data */ 12258e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 12268e09f215SStefan Weinhuber memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 12278e09f215SStefan Weinhuber prssdp->order = PSF_ORDER_PRSSD; 12288e09f215SStefan Weinhuber prssdp->suborder = 0x41; /* Read Feature Codes */ 12298e09f215SStefan Weinhuber /* all other bytes of prssdp must be zero */ 12308e09f215SStefan Weinhuber 12318e09f215SStefan Weinhuber ccw = cqr->cpaddr; 12328e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PSF; 12338e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_psf_prssd_data); 12348e09f215SStefan Weinhuber ccw->flags |= CCW_FLAG_CC; 12358e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) prssdp; 12368e09f215SStefan Weinhuber 12378e09f215SStefan Weinhuber /* Read Subsystem Data - feature codes */ 12388e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 12398e09f215SStefan Weinhuber memset(features, 0, sizeof(struct dasd_rssd_features)); 12408e09f215SStefan Weinhuber 12418e09f215SStefan Weinhuber ccw++; 12428e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RSSD; 12438e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_rssd_features); 12448e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) features; 12458e09f215SStefan Weinhuber 12468e09f215SStefan Weinhuber cqr->buildclk = get_clock(); 12478e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 12488e09f215SStefan Weinhuber rc = dasd_sleep_on(cqr); 12498e09f215SStefan Weinhuber if (rc == 0) { 12508e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 12518e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 12528e09f215SStefan Weinhuber memcpy(&private->features, features, 12538e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)); 125468d1e5f0SStefan Weinhuber } else 125568d1e5f0SStefan Weinhuber dev_warn(&device->cdev->dev, "Reading device feature codes" 125668d1e5f0SStefan Weinhuber " failed with rc=%d\n", rc); 12578e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 12588e09f215SStefan Weinhuber return rc; 12598e09f215SStefan Weinhuber } 12608e09f215SStefan Weinhuber 12618e09f215SStefan Weinhuber 12623d052595SHorst Hummel /* 126340545573SHorst Hummel * Build CP for Perform Subsystem Function - SSC. 126440545573SHorst Hummel */ 1265f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, 1266f3eb5384SStefan Weinhuber int enable_pav) 126740545573SHorst Hummel { 126840545573SHorst Hummel struct dasd_ccw_req *cqr; 126940545573SHorst Hummel struct dasd_psf_ssc_data *psf_ssc_data; 127040545573SHorst Hummel struct ccw1 *ccw; 127140545573SHorst Hummel 127268b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 127340545573SHorst Hummel sizeof(struct dasd_psf_ssc_data), 127440545573SHorst Hummel device); 127540545573SHorst Hummel 127640545573SHorst Hummel if (IS_ERR(cqr)) { 1277fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 127840545573SHorst Hummel "Could not allocate PSF-SSC request"); 127940545573SHorst Hummel return cqr; 128040545573SHorst Hummel } 128140545573SHorst Hummel psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 128240545573SHorst Hummel psf_ssc_data->order = PSF_ORDER_SSC; 1283626350b6SStefan Weinhuber psf_ssc_data->suborder = 0xc0; 1284f3eb5384SStefan Weinhuber if (enable_pav) { 1285626350b6SStefan Weinhuber psf_ssc_data->suborder |= 0x08; 12868e09f215SStefan Weinhuber psf_ssc_data->reserved[0] = 0x88; 1287f3eb5384SStefan Weinhuber } 128840545573SHorst Hummel ccw = cqr->cpaddr; 128940545573SHorst Hummel ccw->cmd_code = DASD_ECKD_CCW_PSF; 129040545573SHorst Hummel ccw->cda = (__u32)(addr_t)psf_ssc_data; 129140545573SHorst Hummel ccw->count = 66; 129240545573SHorst Hummel 12938e09f215SStefan Weinhuber cqr->startdev = device; 12948e09f215SStefan Weinhuber cqr->memdev = device; 12958e09f215SStefan Weinhuber cqr->block = NULL; 1296eb6e199bSStefan Weinhuber cqr->retries = 256; 129740545573SHorst Hummel cqr->expires = 10*HZ; 129840545573SHorst Hummel cqr->buildclk = get_clock(); 129940545573SHorst Hummel cqr->status = DASD_CQR_FILLED; 130040545573SHorst Hummel return cqr; 130140545573SHorst Hummel } 130240545573SHorst Hummel 130340545573SHorst Hummel /* 130440545573SHorst Hummel * Perform Subsystem Function. 130540545573SHorst Hummel * It is necessary to trigger CIO for channel revalidation since this 130640545573SHorst Hummel * call might change behaviour of DASD devices. 130740545573SHorst Hummel */ 130840545573SHorst Hummel static int 1309f3eb5384SStefan Weinhuber dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav) 131040545573SHorst Hummel { 131140545573SHorst Hummel struct dasd_ccw_req *cqr; 131240545573SHorst Hummel int rc; 131340545573SHorst Hummel 1314f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_psf_ssc(device, enable_pav); 131540545573SHorst Hummel if (IS_ERR(cqr)) 131640545573SHorst Hummel return PTR_ERR(cqr); 131740545573SHorst Hummel 131840545573SHorst Hummel rc = dasd_sleep_on(cqr); 131940545573SHorst Hummel if (!rc) 132040545573SHorst Hummel /* trigger CIO to reprobe devices */ 132140545573SHorst Hummel css_schedule_reprobe(); 13228e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 132340545573SHorst Hummel return rc; 132440545573SHorst Hummel } 132540545573SHorst Hummel 132640545573SHorst Hummel /* 132740545573SHorst Hummel * Valide storage server of current device. 132840545573SHorst Hummel */ 1329f4ac1d02SStefan Weinhuber static void dasd_eckd_validate_server(struct dasd_device *device) 133040545573SHorst Hummel { 133140545573SHorst Hummel int rc; 13328e09f215SStefan Weinhuber struct dasd_eckd_private *private; 1333f3eb5384SStefan Weinhuber int enable_pav; 133440545573SHorst Hummel 133540545573SHorst Hummel if (dasd_nopav || MACHINE_IS_VM) 1336f3eb5384SStefan Weinhuber enable_pav = 0; 1337f3eb5384SStefan Weinhuber else 1338f3eb5384SStefan Weinhuber enable_pav = 1; 1339f3eb5384SStefan Weinhuber rc = dasd_eckd_psf_ssc(device, enable_pav); 1340eb6e199bSStefan Weinhuber 134140545573SHorst Hummel /* may be requested feature is not available on server, 134240545573SHorst Hummel * therefore just report error and go ahead */ 13438e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 1344b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " 1345b8ed5dd5SStefan Haberland "returned rc=%d", private->uid.ssid, rc); 134640545573SHorst Hummel } 134740545573SHorst Hummel 1348ef19298bSStefan Weinhuber static u32 get_fcx_max_data(struct dasd_device *device) 1349ef19298bSStefan Weinhuber { 1350ef19298bSStefan Weinhuber #if defined(CONFIG_64BIT) 1351ef19298bSStefan Weinhuber int tpm, mdc; 1352ef19298bSStefan Weinhuber int fcx_in_css, fcx_in_gneq, fcx_in_features; 1353ef19298bSStefan Weinhuber struct dasd_eckd_private *private; 1354ef19298bSStefan Weinhuber 1355ef19298bSStefan Weinhuber if (dasd_nofcx) 1356ef19298bSStefan Weinhuber return 0; 1357ef19298bSStefan Weinhuber /* is transport mode supported? */ 1358ef19298bSStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 1359ef19298bSStefan Weinhuber fcx_in_css = css_general_characteristics.fcx; 1360ef19298bSStefan Weinhuber fcx_in_gneq = private->gneq->reserved2[7] & 0x04; 1361ef19298bSStefan Weinhuber fcx_in_features = private->features.feature[40] & 0x80; 1362ef19298bSStefan Weinhuber tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; 1363ef19298bSStefan Weinhuber 1364ef19298bSStefan Weinhuber if (!tpm) 1365ef19298bSStefan Weinhuber return 0; 1366ef19298bSStefan Weinhuber 1367ef19298bSStefan Weinhuber mdc = ccw_device_get_mdc(device->cdev, 0); 1368ef19298bSStefan Weinhuber if (mdc < 0) { 1369ef19298bSStefan Weinhuber dev_warn(&device->cdev->dev, "Detecting the maximum supported" 1370ef19298bSStefan Weinhuber " data size for zHPF requests failed\n"); 1371ef19298bSStefan Weinhuber return 0; 1372ef19298bSStefan Weinhuber } else 1373ef19298bSStefan Weinhuber return mdc * FCX_MAX_DATA_FACTOR; 1374ef19298bSStefan Weinhuber #else 1375ef19298bSStefan Weinhuber return 0; 1376ef19298bSStefan Weinhuber #endif 1377ef19298bSStefan Weinhuber } 1378ef19298bSStefan Weinhuber 137940545573SHorst Hummel /* 13803d052595SHorst Hummel * Check device characteristics. 13813d052595SHorst Hummel * If the device is accessible using ECKD discipline, the device is enabled. 13823d052595SHorst Hummel */ 13831da177e4SLinus Torvalds static int 13841da177e4SLinus Torvalds dasd_eckd_check_characteristics(struct dasd_device *device) 13851da177e4SLinus Torvalds { 13861da177e4SLinus Torvalds struct dasd_eckd_private *private; 13878e09f215SStefan Weinhuber struct dasd_block *block; 13882dedf0d9SStefan Haberland struct dasd_uid temp_uid; 13897c8faa86SStefan Haberland int is_known, rc, i; 139033b62a30SStefan Weinhuber int readonly; 13917c8faa86SStefan Haberland unsigned long value; 13921da177e4SLinus Torvalds 1393454e1fa1SPeter Oberparleiter if (!ccw_device_is_pathgroup(device->cdev)) { 1394454e1fa1SPeter Oberparleiter dev_warn(&device->cdev->dev, 1395454e1fa1SPeter Oberparleiter "A channel path group could not be established\n"); 1396454e1fa1SPeter Oberparleiter return -EIO; 1397454e1fa1SPeter Oberparleiter } 1398454e1fa1SPeter Oberparleiter if (!ccw_device_is_multipath(device->cdev)) { 1399454e1fa1SPeter Oberparleiter dev_info(&device->cdev->dev, 1400454e1fa1SPeter Oberparleiter "The DASD is not operating in multipath mode\n"); 1401454e1fa1SPeter Oberparleiter } 14021da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 140392636b15SSebastian Ott if (!private) { 140492636b15SSebastian Ott private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); 140592636b15SSebastian Ott if (!private) { 1406fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1407fc19f381SStefan Haberland "Allocating memory for private DASD data " 1408fc19f381SStefan Haberland "failed\n"); 14091da177e4SLinus Torvalds return -ENOMEM; 14101da177e4SLinus Torvalds } 14111da177e4SLinus Torvalds device->private = (void *) private; 141292636b15SSebastian Ott } else { 141392636b15SSebastian Ott memset(private, 0, sizeof(*private)); 14141da177e4SLinus Torvalds } 14151da177e4SLinus Torvalds /* Invalidate status of initial analysis. */ 14161da177e4SLinus Torvalds private->init_cqr_status = -1; 14171da177e4SLinus Torvalds /* Set default cache operations. */ 14181da177e4SLinus Torvalds private->attrib.operation = DASD_NORMAL_CACHE; 14191da177e4SLinus Torvalds private->attrib.nr_cyl = 0; 14201da177e4SLinus Torvalds 142140545573SHorst Hummel /* Read Configuration Data */ 142240545573SHorst Hummel rc = dasd_eckd_read_conf(device); 142340545573SHorst Hummel if (rc) 14248e09f215SStefan Weinhuber goto out_err1; 142540545573SHorst Hummel 14267c8faa86SStefan Haberland /* set default timeout */ 14277c8faa86SStefan Haberland device->default_expires = DASD_EXPIRES; 14287c8faa86SStefan Haberland if (private->gneq) { 14297c8faa86SStefan Haberland value = 1; 14307c8faa86SStefan Haberland for (i = 0; i < private->gneq->timeout.value; i++) 14317c8faa86SStefan Haberland value = 10 * value; 14327c8faa86SStefan Haberland value = value * private->gneq->timeout.number; 14337c8faa86SStefan Haberland /* do not accept useless values */ 14347c8faa86SStefan Haberland if (value != 0 && value <= DASD_EXPIRES_MAX) 14357c8faa86SStefan Haberland device->default_expires = value; 14367c8faa86SStefan Haberland } 14377c8faa86SStefan Haberland 14382dedf0d9SStefan Haberland /* Generate device unique id */ 14392dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 144040545573SHorst Hummel if (rc) 14418e09f215SStefan Weinhuber goto out_err1; 14428e09f215SStefan Weinhuber 14432dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 14442dedf0d9SStefan Haberland if (temp_uid.type == UA_BASE_DEVICE) { 14458e09f215SStefan Weinhuber block = dasd_alloc_block(); 14468e09f215SStefan Weinhuber if (IS_ERR(block)) { 1447b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1448b8ed5dd5SStefan Haberland "could not allocate dasd " 1449b8ed5dd5SStefan Haberland "block structure"); 14508e09f215SStefan Weinhuber rc = PTR_ERR(block); 14518e09f215SStefan Weinhuber goto out_err1; 14528e09f215SStefan Weinhuber } 14538e09f215SStefan Weinhuber device->block = block; 14548e09f215SStefan Weinhuber block->base = device; 14558e09f215SStefan Weinhuber } 14568e09f215SStefan Weinhuber 14578e09f215SStefan Weinhuber /* register lcu with alias handling, enable PAV if this is a new lcu */ 14588e09f215SStefan Weinhuber is_known = dasd_alias_make_device_known_to_lcu(device); 14598e09f215SStefan Weinhuber if (is_known < 0) { 14608e09f215SStefan Weinhuber rc = is_known; 14618e09f215SStefan Weinhuber goto out_err2; 14628e09f215SStefan Weinhuber } 1463f4ac1d02SStefan Weinhuber /* 1464817f2c84SNikanth Karthikesan * dasd_eckd_validate_server is done on the first device that 1465f4ac1d02SStefan Weinhuber * is found for an LCU. All later other devices have to wait 1466f4ac1d02SStefan Weinhuber * for it, so they will read the correct feature codes. 1467f4ac1d02SStefan Weinhuber */ 14688e09f215SStefan Weinhuber if (!is_known) { 1469f4ac1d02SStefan Weinhuber dasd_eckd_validate_server(device); 1470f4ac1d02SStefan Weinhuber dasd_alias_lcu_setup_complete(device); 1471f4ac1d02SStefan Weinhuber } else 1472f4ac1d02SStefan Weinhuber dasd_alias_wait_for_lcu_setup(device); 1473f4ac1d02SStefan Weinhuber 1474f4ac1d02SStefan Weinhuber /* device may report different configuration data after LCU setup */ 1475f4ac1d02SStefan Weinhuber rc = dasd_eckd_read_conf(device); 147640545573SHorst Hummel if (rc) 14778e09f215SStefan Weinhuber goto out_err3; 14788e09f215SStefan Weinhuber 14798e09f215SStefan Weinhuber /* Read Feature Codes */ 148068d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 148140545573SHorst Hummel 14821da177e4SLinus Torvalds /* Read Device Characteristics */ 148368b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 148468b781feSStefan Haberland &private->rdc_data, 64); 14858e09f215SStefan Weinhuber if (rc) { 1486b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1487b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 14888e09f215SStefan Weinhuber goto out_err3; 14898e09f215SStefan Weinhuber } 149034cd551aSStefan Haberland 149134cd551aSStefan Haberland if ((device->features & DASD_FEATURE_USERAW) && 149234cd551aSStefan Haberland !(private->rdc_data.facilities.RT_in_LR)) { 149334cd551aSStefan Haberland dev_err(&device->cdev->dev, "The storage server does not " 149434cd551aSStefan Haberland "support raw-track access\n"); 149534cd551aSStefan Haberland rc = -EINVAL; 149634cd551aSStefan Haberland goto out_err3; 149734cd551aSStefan Haberland } 149834cd551aSStefan Haberland 1499817f2c84SNikanth Karthikesan /* find the valid cylinder size */ 1500b44b0ab3SStefan Weinhuber if (private->rdc_data.no_cyl == LV_COMPAT_CYL && 1501b44b0ab3SStefan Weinhuber private->rdc_data.long_no_cyl) 1502b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.long_no_cyl; 1503b44b0ab3SStefan Weinhuber else 1504b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.no_cyl; 1505b44b0ab3SStefan Weinhuber 1506ef19298bSStefan Weinhuber private->fcx_max_data = get_fcx_max_data(device); 1507ef19298bSStefan Weinhuber 150833b62a30SStefan Weinhuber readonly = dasd_device_is_ro(device); 150933b62a30SStefan Weinhuber if (readonly) 151033b62a30SStefan Weinhuber set_bit(DASD_FLAG_DEVICE_RO, &device->flags); 151133b62a30SStefan Weinhuber 1512fc19f381SStefan Haberland dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " 151333b62a30SStefan Weinhuber "with %d cylinders, %d heads, %d sectors%s\n", 15141da177e4SLinus Torvalds private->rdc_data.dev_type, 15151da177e4SLinus Torvalds private->rdc_data.dev_model, 15161da177e4SLinus Torvalds private->rdc_data.cu_type, 15171da177e4SLinus Torvalds private->rdc_data.cu_model.model, 1518b44b0ab3SStefan Weinhuber private->real_cyl, 15191da177e4SLinus Torvalds private->rdc_data.trk_per_cyl, 152033b62a30SStefan Weinhuber private->rdc_data.sec_per_trk, 152133b62a30SStefan Weinhuber readonly ? ", read-only device" : ""); 15228e09f215SStefan Weinhuber return 0; 15238e09f215SStefan Weinhuber 15248e09f215SStefan Weinhuber out_err3: 15258e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 15268e09f215SStefan Weinhuber out_err2: 15278e09f215SStefan Weinhuber dasd_free_block(device->block); 15288e09f215SStefan Weinhuber device->block = NULL; 15298e09f215SStefan Weinhuber out_err1: 15304abb08c2SStefan Weinhuber kfree(private->conf_data); 15318e09f215SStefan Weinhuber kfree(device->private); 15328e09f215SStefan Weinhuber device->private = NULL; 15333d052595SHorst Hummel return rc; 15341da177e4SLinus Torvalds } 15351da177e4SLinus Torvalds 15368e09f215SStefan Weinhuber static void dasd_eckd_uncheck_device(struct dasd_device *device) 15378e09f215SStefan Weinhuber { 15384abb08c2SStefan Weinhuber struct dasd_eckd_private *private; 15394abb08c2SStefan Weinhuber 15404abb08c2SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 15418e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 15424abb08c2SStefan Weinhuber private->ned = NULL; 15434abb08c2SStefan Weinhuber private->sneq = NULL; 15444abb08c2SStefan Weinhuber private->vdsneq = NULL; 15454abb08c2SStefan Weinhuber private->gneq = NULL; 15464abb08c2SStefan Weinhuber private->conf_len = 0; 15474abb08c2SStefan Weinhuber kfree(private->conf_data); 15484abb08c2SStefan Weinhuber private->conf_data = NULL; 15498e09f215SStefan Weinhuber } 15508e09f215SStefan Weinhuber 15511da177e4SLinus Torvalds static struct dasd_ccw_req * 15521da177e4SLinus Torvalds dasd_eckd_analysis_ccw(struct dasd_device *device) 15531da177e4SLinus Torvalds { 15541da177e4SLinus Torvalds struct dasd_eckd_private *private; 15551da177e4SLinus Torvalds struct eckd_count *count_data; 15561da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 15571da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 15581da177e4SLinus Torvalds struct ccw1 *ccw; 15591da177e4SLinus Torvalds int cplength, datasize; 15601da177e4SLinus Torvalds int i; 15611da177e4SLinus Torvalds 15621da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 15631da177e4SLinus Torvalds 15641da177e4SLinus Torvalds cplength = 8; 15651da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 156668b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 15671da177e4SLinus Torvalds if (IS_ERR(cqr)) 15681da177e4SLinus Torvalds return cqr; 15691da177e4SLinus Torvalds ccw = cqr->cpaddr; 15701da177e4SLinus Torvalds /* Define extent for the first 3 tracks. */ 15711da177e4SLinus Torvalds define_extent(ccw++, cqr->data, 0, 2, 15721da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device); 15731da177e4SLinus Torvalds LO_data = cqr->data + sizeof(struct DE_eckd_data); 15741da177e4SLinus Torvalds /* Locate record for the first 4 records on track 0. */ 15751da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 15761da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 0, 0, 4, 15771da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 15781da177e4SLinus Torvalds 15791da177e4SLinus Torvalds count_data = private->count_area; 15801da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 15811da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 15821da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 15831da177e4SLinus Torvalds ccw->flags = 0; 15841da177e4SLinus Torvalds ccw->count = 8; 15851da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 15861da177e4SLinus Torvalds ccw++; 15871da177e4SLinus Torvalds count_data++; 15881da177e4SLinus Torvalds } 15891da177e4SLinus Torvalds 15901da177e4SLinus Torvalds /* Locate record for the first record on track 2. */ 15911da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 15921da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 2, 0, 1, 15931da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 15941da177e4SLinus Torvalds /* Read count ccw. */ 15951da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 15961da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 15971da177e4SLinus Torvalds ccw->flags = 0; 15981da177e4SLinus Torvalds ccw->count = 8; 15991da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 16001da177e4SLinus Torvalds 16018e09f215SStefan Weinhuber cqr->block = NULL; 16028e09f215SStefan Weinhuber cqr->startdev = device; 16038e09f215SStefan Weinhuber cqr->memdev = device; 1604eb6e199bSStefan Weinhuber cqr->retries = 255; 16051da177e4SLinus Torvalds cqr->buildclk = get_clock(); 16061da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 16071da177e4SLinus Torvalds return cqr; 16081da177e4SLinus Torvalds } 16091da177e4SLinus Torvalds 1610eb6e199bSStefan Weinhuber /* differentiate between 'no record found' and any other error */ 1611eb6e199bSStefan Weinhuber static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) 1612eb6e199bSStefan Weinhuber { 1613eb6e199bSStefan Weinhuber char *sense; 1614eb6e199bSStefan Weinhuber if (init_cqr->status == DASD_CQR_DONE) 1615eb6e199bSStefan Weinhuber return INIT_CQR_OK; 1616eb6e199bSStefan Weinhuber else if (init_cqr->status == DASD_CQR_NEED_ERP || 1617eb6e199bSStefan Weinhuber init_cqr->status == DASD_CQR_FAILED) { 1618eb6e199bSStefan Weinhuber sense = dasd_get_sense(&init_cqr->irb); 1619eb6e199bSStefan Weinhuber if (sense && (sense[1] & SNS1_NO_REC_FOUND)) 1620eb6e199bSStefan Weinhuber return INIT_CQR_UNFORMATTED; 1621eb6e199bSStefan Weinhuber else 1622eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 1623eb6e199bSStefan Weinhuber } else 1624eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 1625eb6e199bSStefan Weinhuber } 1626eb6e199bSStefan Weinhuber 16271da177e4SLinus Torvalds /* 16281da177e4SLinus Torvalds * This is the callback function for the init_analysis cqr. It saves 16291da177e4SLinus Torvalds * the status of the initial analysis ccw before it frees it and kicks 16301da177e4SLinus Torvalds * the device to continue the startup sequence. This will call 16311da177e4SLinus Torvalds * dasd_eckd_do_analysis again (if the devices has not been marked 16321da177e4SLinus Torvalds * for deletion in the meantime). 16331da177e4SLinus Torvalds */ 1634eb6e199bSStefan Weinhuber static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, 1635eb6e199bSStefan Weinhuber void *data) 16361da177e4SLinus Torvalds { 16371da177e4SLinus Torvalds struct dasd_eckd_private *private; 16381da177e4SLinus Torvalds struct dasd_device *device; 16391da177e4SLinus Torvalds 16408e09f215SStefan Weinhuber device = init_cqr->startdev; 16411da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 1642eb6e199bSStefan Weinhuber private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); 16431da177e4SLinus Torvalds dasd_sfree_request(init_cqr, device); 16441da177e4SLinus Torvalds dasd_kick_device(device); 16451da177e4SLinus Torvalds } 16461da177e4SLinus Torvalds 1647eb6e199bSStefan Weinhuber static int dasd_eckd_start_analysis(struct dasd_block *block) 16481da177e4SLinus Torvalds { 16491da177e4SLinus Torvalds struct dasd_ccw_req *init_cqr; 16501da177e4SLinus Torvalds 16518e09f215SStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(block->base); 16521da177e4SLinus Torvalds if (IS_ERR(init_cqr)) 16531da177e4SLinus Torvalds return PTR_ERR(init_cqr); 16541da177e4SLinus Torvalds init_cqr->callback = dasd_eckd_analysis_callback; 16551da177e4SLinus Torvalds init_cqr->callback_data = NULL; 16561da177e4SLinus Torvalds init_cqr->expires = 5*HZ; 1657eb6e199bSStefan Weinhuber /* first try without ERP, so we can later handle unformatted 1658eb6e199bSStefan Weinhuber * devices as special case 1659eb6e199bSStefan Weinhuber */ 1660eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); 1661eb6e199bSStefan Weinhuber init_cqr->retries = 0; 16621da177e4SLinus Torvalds dasd_add_request_head(init_cqr); 16631da177e4SLinus Torvalds return -EAGAIN; 16641da177e4SLinus Torvalds } 16651da177e4SLinus Torvalds 1666eb6e199bSStefan Weinhuber static int dasd_eckd_end_analysis(struct dasd_block *block) 16671da177e4SLinus Torvalds { 16688e09f215SStefan Weinhuber struct dasd_device *device; 16691da177e4SLinus Torvalds struct dasd_eckd_private *private; 16701da177e4SLinus Torvalds struct eckd_count *count_area; 16711da177e4SLinus Torvalds unsigned int sb, blk_per_trk; 16721da177e4SLinus Torvalds int status, i; 1673eb6e199bSStefan Weinhuber struct dasd_ccw_req *init_cqr; 16741da177e4SLinus Torvalds 16758e09f215SStefan Weinhuber device = block->base; 16761da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 16771da177e4SLinus Torvalds status = private->init_cqr_status; 16781da177e4SLinus Torvalds private->init_cqr_status = -1; 1679eb6e199bSStefan Weinhuber if (status == INIT_CQR_ERROR) { 1680eb6e199bSStefan Weinhuber /* try again, this time with full ERP */ 1681eb6e199bSStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(device); 1682eb6e199bSStefan Weinhuber dasd_sleep_on(init_cqr); 1683eb6e199bSStefan Weinhuber status = dasd_eckd_analysis_evaluation(init_cqr); 1684eb6e199bSStefan Weinhuber dasd_sfree_request(init_cqr, device); 1685eb6e199bSStefan Weinhuber } 1686eb6e199bSStefan Weinhuber 1687e4dbb0f2SStefan Haberland if (device->features & DASD_FEATURE_USERAW) { 1688e4dbb0f2SStefan Haberland block->bp_block = DASD_RAW_BLOCKSIZE; 1689e4dbb0f2SStefan Haberland blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; 1690e4dbb0f2SStefan Haberland block->s2b_shift = 3; 1691e4dbb0f2SStefan Haberland goto raw; 1692e4dbb0f2SStefan Haberland } 1693e4dbb0f2SStefan Haberland 1694eb6e199bSStefan Weinhuber if (status == INIT_CQR_UNFORMATTED) { 1695eb6e199bSStefan Weinhuber dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); 16961da177e4SLinus Torvalds return -EMEDIUMTYPE; 1697eb6e199bSStefan Weinhuber } else if (status == INIT_CQR_ERROR) { 1698eb6e199bSStefan Weinhuber dev_err(&device->cdev->dev, 1699eb6e199bSStefan Weinhuber "Detecting the DASD disk layout failed because " 1700eb6e199bSStefan Weinhuber "of an I/O error\n"); 1701eb6e199bSStefan Weinhuber return -EIO; 17021da177e4SLinus Torvalds } 17031da177e4SLinus Torvalds 17041da177e4SLinus Torvalds private->uses_cdl = 1; 17051da177e4SLinus Torvalds /* Check Track 0 for Compatible Disk Layout */ 17061da177e4SLinus Torvalds count_area = NULL; 17071da177e4SLinus Torvalds for (i = 0; i < 3; i++) { 17081da177e4SLinus Torvalds if (private->count_area[i].kl != 4 || 17091da177e4SLinus Torvalds private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4) { 17101da177e4SLinus Torvalds private->uses_cdl = 0; 17111da177e4SLinus Torvalds break; 17121da177e4SLinus Torvalds } 17131da177e4SLinus Torvalds } 17141da177e4SLinus Torvalds if (i == 3) 17151da177e4SLinus Torvalds count_area = &private->count_area[4]; 17161da177e4SLinus Torvalds 17171da177e4SLinus Torvalds if (private->uses_cdl == 0) { 17181da177e4SLinus Torvalds for (i = 0; i < 5; i++) { 17191da177e4SLinus Torvalds if ((private->count_area[i].kl != 0) || 17201da177e4SLinus Torvalds (private->count_area[i].dl != 17211da177e4SLinus Torvalds private->count_area[0].dl)) 17221da177e4SLinus Torvalds break; 17231da177e4SLinus Torvalds } 17241da177e4SLinus Torvalds if (i == 5) 17251da177e4SLinus Torvalds count_area = &private->count_area[0]; 17261da177e4SLinus Torvalds } else { 17271da177e4SLinus Torvalds if (private->count_area[3].record == 1) 1728fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1729fc19f381SStefan Haberland "Track 0 has no records following the VTOC\n"); 17301da177e4SLinus Torvalds } 1731e4dbb0f2SStefan Haberland 17321da177e4SLinus Torvalds if (count_area != NULL && count_area->kl == 0) { 17331da177e4SLinus Torvalds /* we found notthing violating our disk layout */ 17341da177e4SLinus Torvalds if (dasd_check_blocksize(count_area->dl) == 0) 17358e09f215SStefan Weinhuber block->bp_block = count_area->dl; 17361da177e4SLinus Torvalds } 17378e09f215SStefan Weinhuber if (block->bp_block == 0) { 1738fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1739fc19f381SStefan Haberland "The disk layout of the DASD is not supported\n"); 17401da177e4SLinus Torvalds return -EMEDIUMTYPE; 17411da177e4SLinus Torvalds } 17428e09f215SStefan Weinhuber block->s2b_shift = 0; /* bits to shift 512 to get a block */ 17438e09f215SStefan Weinhuber for (sb = 512; sb < block->bp_block; sb = sb << 1) 17448e09f215SStefan Weinhuber block->s2b_shift++; 17451da177e4SLinus Torvalds 17468e09f215SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 1747e4dbb0f2SStefan Haberland 1748e4dbb0f2SStefan Haberland raw: 1749b44b0ab3SStefan Weinhuber block->blocks = (private->real_cyl * 17501da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 17511da177e4SLinus Torvalds blk_per_trk); 17521da177e4SLinus Torvalds 1753fc19f381SStefan Haberland dev_info(&device->cdev->dev, 1754fc19f381SStefan Haberland "DASD with %d KB/block, %d KB total size, %d KB/track, " 1755fc19f381SStefan Haberland "%s\n", (block->bp_block >> 10), 1756b44b0ab3SStefan Weinhuber ((private->real_cyl * 17571da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 17588e09f215SStefan Weinhuber blk_per_trk * (block->bp_block >> 9)) >> 1), 17598e09f215SStefan Weinhuber ((blk_per_trk * block->bp_block) >> 10), 17601da177e4SLinus Torvalds private->uses_cdl ? 17611da177e4SLinus Torvalds "compatible disk layout" : "linux disk layout"); 17621da177e4SLinus Torvalds 17631da177e4SLinus Torvalds return 0; 17641da177e4SLinus Torvalds } 17651da177e4SLinus Torvalds 17668e09f215SStefan Weinhuber static int dasd_eckd_do_analysis(struct dasd_block *block) 17671da177e4SLinus Torvalds { 17681da177e4SLinus Torvalds struct dasd_eckd_private *private; 17691da177e4SLinus Torvalds 17708e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 17711da177e4SLinus Torvalds if (private->init_cqr_status < 0) 17728e09f215SStefan Weinhuber return dasd_eckd_start_analysis(block); 17731da177e4SLinus Torvalds else 17748e09f215SStefan Weinhuber return dasd_eckd_end_analysis(block); 17751da177e4SLinus Torvalds } 17761da177e4SLinus Torvalds 17778e09f215SStefan Weinhuber static int dasd_eckd_ready_to_online(struct dasd_device *device) 17788e09f215SStefan Weinhuber { 17798e09f215SStefan Weinhuber return dasd_alias_add_device(device); 17808e09f215SStefan Weinhuber }; 17818e09f215SStefan Weinhuber 17828e09f215SStefan Weinhuber static int dasd_eckd_online_to_ready(struct dasd_device *device) 17838e09f215SStefan Weinhuber { 1784501183f2SStefan Haberland cancel_work_sync(&device->reload_device); 17858e09f215SStefan Weinhuber return dasd_alias_remove_device(device); 17868e09f215SStefan Weinhuber }; 17878e09f215SStefan Weinhuber 17881da177e4SLinus Torvalds static int 17898e09f215SStefan Weinhuber dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 17901da177e4SLinus Torvalds { 17911da177e4SLinus Torvalds struct dasd_eckd_private *private; 17921da177e4SLinus Torvalds 17938e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 17948e09f215SStefan Weinhuber if (dasd_check_blocksize(block->bp_block) == 0) { 17951da177e4SLinus Torvalds geo->sectors = recs_per_track(&private->rdc_data, 17968e09f215SStefan Weinhuber 0, block->bp_block); 17971da177e4SLinus Torvalds } 17981da177e4SLinus Torvalds geo->cylinders = private->rdc_data.no_cyl; 17991da177e4SLinus Torvalds geo->heads = private->rdc_data.trk_per_cyl; 18001da177e4SLinus Torvalds return 0; 18011da177e4SLinus Torvalds } 18021da177e4SLinus Torvalds 18031da177e4SLinus Torvalds static struct dasd_ccw_req * 18041da177e4SLinus Torvalds dasd_eckd_format_device(struct dasd_device * device, 18051da177e4SLinus Torvalds struct format_data_t * fdata) 18061da177e4SLinus Torvalds { 18071da177e4SLinus Torvalds struct dasd_eckd_private *private; 18081da177e4SLinus Torvalds struct dasd_ccw_req *fcp; 18091da177e4SLinus Torvalds struct eckd_count *ect; 18101da177e4SLinus Torvalds struct ccw1 *ccw; 18111da177e4SLinus Torvalds void *data; 1812b44b0ab3SStefan Weinhuber int rpt; 1813b44b0ab3SStefan Weinhuber struct ch_t address; 18141da177e4SLinus Torvalds int cplength, datasize; 18151da177e4SLinus Torvalds int i; 1816f9a28f7bSJean-Baptiste Joret int intensity = 0; 1817f9a28f7bSJean-Baptiste Joret int r0_perm; 18181da177e4SLinus Torvalds 18191da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 18201da177e4SLinus Torvalds rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize); 1821b44b0ab3SStefan Weinhuber set_ch_t(&address, 1822b44b0ab3SStefan Weinhuber fdata->start_unit / private->rdc_data.trk_per_cyl, 1823b44b0ab3SStefan Weinhuber fdata->start_unit % private->rdc_data.trk_per_cyl); 18241da177e4SLinus Torvalds 18251da177e4SLinus Torvalds /* Sanity checks. */ 18261da177e4SLinus Torvalds if (fdata->start_unit >= 1827b44b0ab3SStefan Weinhuber (private->real_cyl * private->rdc_data.trk_per_cyl)) { 1828fc19f381SStefan Haberland dev_warn(&device->cdev->dev, "Start track number %d used in " 1829fc19f381SStefan Haberland "formatting is too big\n", fdata->start_unit); 18301da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 18311da177e4SLinus Torvalds } 18321da177e4SLinus Torvalds if (fdata->start_unit > fdata->stop_unit) { 1833fc19f381SStefan Haberland dev_warn(&device->cdev->dev, "Start track %d used in " 1834fc19f381SStefan Haberland "formatting exceeds end track\n", fdata->start_unit); 18351da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 18361da177e4SLinus Torvalds } 18371da177e4SLinus Torvalds if (dasd_check_blocksize(fdata->blksize) != 0) { 1838fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1839fc19f381SStefan Haberland "The DASD cannot be formatted with block size %d\n", 18401da177e4SLinus Torvalds fdata->blksize); 18411da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 18421da177e4SLinus Torvalds } 18431da177e4SLinus Torvalds 18441da177e4SLinus Torvalds /* 18451da177e4SLinus Torvalds * fdata->intensity is a bit string that tells us what to do: 18461da177e4SLinus Torvalds * Bit 0: write record zero 18471da177e4SLinus Torvalds * Bit 1: write home address, currently not supported 18481da177e4SLinus Torvalds * Bit 2: invalidate tracks 18491da177e4SLinus Torvalds * Bit 3: use OS/390 compatible disk layout (cdl) 1850f9a28f7bSJean-Baptiste Joret * Bit 4: do not allow storage subsystem to modify record zero 18511da177e4SLinus Torvalds * Only some bit combinations do make sense. 18521da177e4SLinus Torvalds */ 1853f9a28f7bSJean-Baptiste Joret if (fdata->intensity & 0x10) { 1854f9a28f7bSJean-Baptiste Joret r0_perm = 0; 1855f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity & ~0x10; 1856f9a28f7bSJean-Baptiste Joret } else { 1857f9a28f7bSJean-Baptiste Joret r0_perm = 1; 1858f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity; 1859f9a28f7bSJean-Baptiste Joret } 1860f9a28f7bSJean-Baptiste Joret switch (intensity) { 18611da177e4SLinus Torvalds case 0x00: /* Normal format */ 18621da177e4SLinus Torvalds case 0x08: /* Normal format, use cdl. */ 18631da177e4SLinus Torvalds cplength = 2 + rpt; 18641da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 18651da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 18661da177e4SLinus Torvalds rpt * sizeof(struct eckd_count); 18671da177e4SLinus Torvalds break; 18681da177e4SLinus Torvalds case 0x01: /* Write record zero and format track. */ 18691da177e4SLinus Torvalds case 0x09: /* Write record zero and format track, use cdl. */ 18701da177e4SLinus Torvalds cplength = 3 + rpt; 18711da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 18721da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 18731da177e4SLinus Torvalds sizeof(struct eckd_count) + 18741da177e4SLinus Torvalds rpt * sizeof(struct eckd_count); 18751da177e4SLinus Torvalds break; 18761da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 18771da177e4SLinus Torvalds case 0x0c: /* Invalidate track, use cdl. */ 18781da177e4SLinus Torvalds cplength = 3; 18791da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 18801da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 18811da177e4SLinus Torvalds sizeof(struct eckd_count); 18821da177e4SLinus Torvalds break; 18831da177e4SLinus Torvalds default: 1884fc19f381SStefan Haberland dev_warn(&device->cdev->dev, "An I/O control call used " 1885fc19f381SStefan Haberland "incorrect flags 0x%x\n", fdata->intensity); 18861da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 18871da177e4SLinus Torvalds } 18881da177e4SLinus Torvalds /* Allocate the format ccw request. */ 188968b781feSStefan Haberland fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 18901da177e4SLinus Torvalds if (IS_ERR(fcp)) 18911da177e4SLinus Torvalds return fcp; 18921da177e4SLinus Torvalds 18931da177e4SLinus Torvalds data = fcp->data; 18941da177e4SLinus Torvalds ccw = fcp->cpaddr; 18951da177e4SLinus Torvalds 1896f9a28f7bSJean-Baptiste Joret switch (intensity & ~0x08) { 18971da177e4SLinus Torvalds case 0x00: /* Normal format. */ 18981da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 18991da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 19001da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device); 1901f9a28f7bSJean-Baptiste Joret /* grant subsystem permission to format R0 */ 1902f9a28f7bSJean-Baptiste Joret if (r0_perm) 1903f9a28f7bSJean-Baptiste Joret ((struct DE_eckd_data *)data)->ga_extended |= 0x04; 19041da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 19051da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 19061da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 19071da177e4SLinus Torvalds fdata->start_unit, 0, rpt, 19081da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device, 19091da177e4SLinus Torvalds fdata->blksize); 19101da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 19111da177e4SLinus Torvalds break; 19121da177e4SLinus Torvalds case 0x01: /* Write record zero + format track. */ 19131da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 19141da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 19151da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, 19161da177e4SLinus Torvalds device); 19171da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 19181da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 19191da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 19201da177e4SLinus Torvalds fdata->start_unit, 0, rpt + 1, 19211da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, device, 19228e09f215SStefan Weinhuber device->block->bp_block); 19231da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 19241da177e4SLinus Torvalds break; 19251da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 19261da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 19271da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 19281da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device); 19291da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 19301da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 19311da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 19321da177e4SLinus Torvalds fdata->start_unit, 0, 1, 19331da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device, 8); 19341da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 19351da177e4SLinus Torvalds break; 19361da177e4SLinus Torvalds } 1937f9a28f7bSJean-Baptiste Joret if (intensity & 0x01) { /* write record zero */ 19381da177e4SLinus Torvalds ect = (struct eckd_count *) data; 19391da177e4SLinus Torvalds data += sizeof(struct eckd_count); 1940b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 1941b44b0ab3SStefan Weinhuber ect->head = address.head; 19421da177e4SLinus Torvalds ect->record = 0; 19431da177e4SLinus Torvalds ect->kl = 0; 19441da177e4SLinus Torvalds ect->dl = 8; 19451da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 19461da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 19471da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 19481da177e4SLinus Torvalds ccw->count = 8; 19491da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 19501da177e4SLinus Torvalds ccw++; 19511da177e4SLinus Torvalds } 1952f9a28f7bSJean-Baptiste Joret if ((intensity & ~0x08) & 0x04) { /* erase track */ 19531da177e4SLinus Torvalds ect = (struct eckd_count *) data; 19541da177e4SLinus Torvalds data += sizeof(struct eckd_count); 1955b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 1956b44b0ab3SStefan Weinhuber ect->head = address.head; 19571da177e4SLinus Torvalds ect->record = 1; 19581da177e4SLinus Torvalds ect->kl = 0; 19591da177e4SLinus Torvalds ect->dl = 0; 19601da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 19611da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 19621da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 19631da177e4SLinus Torvalds ccw->count = 8; 19641da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 19651da177e4SLinus Torvalds } else { /* write remaining records */ 19661da177e4SLinus Torvalds for (i = 0; i < rpt; i++) { 19671da177e4SLinus Torvalds ect = (struct eckd_count *) data; 19681da177e4SLinus Torvalds data += sizeof(struct eckd_count); 1969b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 1970b44b0ab3SStefan Weinhuber ect->head = address.head; 19711da177e4SLinus Torvalds ect->record = i + 1; 19721da177e4SLinus Torvalds ect->kl = 0; 19731da177e4SLinus Torvalds ect->dl = fdata->blksize; 19741da177e4SLinus Torvalds /* Check for special tracks 0-1 when formatting CDL */ 1975f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 19761da177e4SLinus Torvalds fdata->start_unit == 0) { 19771da177e4SLinus Torvalds if (i < 3) { 19781da177e4SLinus Torvalds ect->kl = 4; 19791da177e4SLinus Torvalds ect->dl = sizes_trk0[i] - 4; 19801da177e4SLinus Torvalds } 19811da177e4SLinus Torvalds } 1982f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 19831da177e4SLinus Torvalds fdata->start_unit == 1) { 19841da177e4SLinus Torvalds ect->kl = 44; 19851da177e4SLinus Torvalds ect->dl = LABEL_SIZE - 44; 19861da177e4SLinus Torvalds } 19871da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 19881da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 19891da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 19901da177e4SLinus Torvalds ccw->count = 8; 19911da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 19921da177e4SLinus Torvalds ccw++; 19931da177e4SLinus Torvalds } 19941da177e4SLinus Torvalds } 19958e09f215SStefan Weinhuber fcp->startdev = device; 19968e09f215SStefan Weinhuber fcp->memdev = device; 1997eb6e199bSStefan Weinhuber fcp->retries = 256; 19981da177e4SLinus Torvalds fcp->buildclk = get_clock(); 19991da177e4SLinus Torvalds fcp->status = DASD_CQR_FILLED; 20001da177e4SLinus Torvalds return fcp; 20011da177e4SLinus Torvalds } 20021da177e4SLinus Torvalds 20038e09f215SStefan Weinhuber static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 20041da177e4SLinus Torvalds { 20058e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 20068e09f215SStefan Weinhuber if (cqr->block && (cqr->startdev != cqr->block->base)) { 20078e09f215SStefan Weinhuber dasd_eckd_reset_ccw_to_base_io(cqr); 20088e09f215SStefan Weinhuber cqr->startdev = cqr->block->base; 2009a4d26c6aSStefan Weinhuber cqr->lpm = cqr->block->base->path_data.opm; 20101da177e4SLinus Torvalds } 20118e09f215SStefan Weinhuber }; 20121da177e4SLinus Torvalds 20131da177e4SLinus Torvalds static dasd_erp_fn_t 20141da177e4SLinus Torvalds dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 20151da177e4SLinus Torvalds { 20168e09f215SStefan Weinhuber struct dasd_device *device = (struct dasd_device *) cqr->startdev; 20171da177e4SLinus Torvalds struct ccw_device *cdev = device->cdev; 20181da177e4SLinus Torvalds 20191da177e4SLinus Torvalds switch (cdev->id.cu_type) { 20201da177e4SLinus Torvalds case 0x3990: 20211da177e4SLinus Torvalds case 0x2105: 20221da177e4SLinus Torvalds case 0x2107: 20231da177e4SLinus Torvalds case 0x1750: 20241da177e4SLinus Torvalds return dasd_3990_erp_action; 20251da177e4SLinus Torvalds case 0x9343: 20261da177e4SLinus Torvalds case 0x3880: 20271da177e4SLinus Torvalds default: 20281da177e4SLinus Torvalds return dasd_default_erp_action; 20291da177e4SLinus Torvalds } 20301da177e4SLinus Torvalds } 20311da177e4SLinus Torvalds 20321da177e4SLinus Torvalds static dasd_erp_fn_t 20331da177e4SLinus Torvalds dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 20341da177e4SLinus Torvalds { 20351da177e4SLinus Torvalds return dasd_default_erp_postaction; 20361da177e4SLinus Torvalds } 20371da177e4SLinus Torvalds 20385a27e60dSStefan Weinhuber static void dasd_eckd_check_for_device_change(struct dasd_device *device, 20395a27e60dSStefan Weinhuber struct dasd_ccw_req *cqr, 20408e09f215SStefan Weinhuber struct irb *irb) 20418e09f215SStefan Weinhuber { 20428e09f215SStefan Weinhuber char mask; 2043f3eb5384SStefan Weinhuber char *sense = NULL; 2044501183f2SStefan Haberland struct dasd_eckd_private *private; 20458e09f215SStefan Weinhuber 2046501183f2SStefan Haberland private = (struct dasd_eckd_private *) device->private; 20478e09f215SStefan Weinhuber /* first of all check for state change pending interrupt */ 20488e09f215SStefan Weinhuber mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 2049f3eb5384SStefan Weinhuber if ((scsw_dstat(&irb->scsw) & mask) == mask) { 2050501183f2SStefan Haberland /* for alias only and not in offline processing*/ 2051501183f2SStefan Haberland if (!device->block && private->lcu && 2052501183f2SStefan Haberland !test_bit(DASD_FLAG_OFFLINE, &device->flags)) { 2053501183f2SStefan Haberland /* 2054501183f2SStefan Haberland * the state change could be caused by an alias 2055501183f2SStefan Haberland * reassignment remove device from alias handling 2056501183f2SStefan Haberland * to prevent new requests from being scheduled on 2057501183f2SStefan Haberland * the wrong alias device 2058501183f2SStefan Haberland */ 2059501183f2SStefan Haberland dasd_alias_remove_device(device); 2060501183f2SStefan Haberland 2061501183f2SStefan Haberland /* schedule worker to reload device */ 2062501183f2SStefan Haberland dasd_reload_device(device); 2063501183f2SStefan Haberland } 20648e09f215SStefan Weinhuber dasd_generic_handle_state_change(device); 20658e09f215SStefan Weinhuber return; 20668e09f215SStefan Weinhuber } 20678e09f215SStefan Weinhuber 2068a5a0061fSStefan Weinhuber sense = dasd_get_sense(irb); 20695a27e60dSStefan Weinhuber if (!sense) 20705a27e60dSStefan Weinhuber return; 20715a27e60dSStefan Weinhuber 20725a27e60dSStefan Weinhuber /* summary unit check */ 2073c7a29e56SStefan Weinhuber if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) && 2074a5a0061fSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { 20758e09f215SStefan Weinhuber dasd_alias_handle_summary_unit_check(device, irb); 20768e09f215SStefan Weinhuber return; 20778e09f215SStefan Weinhuber } 20788e09f215SStefan Weinhuber 2079f60c768cSStefan Haberland /* service information message SIM */ 20805a27e60dSStefan Weinhuber if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && 2081f3eb5384SStefan Weinhuber ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 2082f3eb5384SStefan Weinhuber dasd_3990_erp_handle_sim(device, sense); 2083f60c768cSStefan Haberland return; 2084f60c768cSStefan Haberland } 2085f60c768cSStefan Haberland 20865a27e60dSStefan Weinhuber /* loss of device reservation is handled via base devices only 20875a27e60dSStefan Weinhuber * as alias devices may be used with several bases 20885a27e60dSStefan Weinhuber */ 2089c7a29e56SStefan Weinhuber if (device->block && (sense[27] & DASD_SENSE_BIT_0) && 2090c7a29e56SStefan Weinhuber (sense[7] == 0x3F) && 20915a27e60dSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && 20925a27e60dSStefan Weinhuber test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { 20935a27e60dSStefan Weinhuber if (device->features & DASD_FEATURE_FAILONSLCK) 20945a27e60dSStefan Weinhuber set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); 20955a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 20965a27e60dSStefan Weinhuber dev_err(&device->cdev->dev, 20975a27e60dSStefan Weinhuber "The device reservation was lost\n"); 2098ada3df91SStefan Haberland } 20995a27e60dSStefan Weinhuber } 2100f3eb5384SStefan Weinhuber 2101f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( 2102f3eb5384SStefan Weinhuber struct dasd_device *startdev, 21038e09f215SStefan Weinhuber struct dasd_block *block, 2104f3eb5384SStefan Weinhuber struct request *req, 2105f3eb5384SStefan Weinhuber sector_t first_rec, 2106f3eb5384SStefan Weinhuber sector_t last_rec, 2107f3eb5384SStefan Weinhuber sector_t first_trk, 2108f3eb5384SStefan Weinhuber sector_t last_trk, 2109f3eb5384SStefan Weinhuber unsigned int first_offs, 2110f3eb5384SStefan Weinhuber unsigned int last_offs, 2111f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 2112f3eb5384SStefan Weinhuber unsigned int blksize) 21131da177e4SLinus Torvalds { 21141da177e4SLinus Torvalds struct dasd_eckd_private *private; 21151da177e4SLinus Torvalds unsigned long *idaws; 21161da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 21171da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 21181da177e4SLinus Torvalds struct ccw1 *ccw; 21195705f702SNeilBrown struct req_iterator iter; 21201da177e4SLinus Torvalds struct bio_vec *bv; 21211da177e4SLinus Torvalds char *dst; 2122f3eb5384SStefan Weinhuber unsigned int off; 21231da177e4SLinus Torvalds int count, cidaw, cplength, datasize; 2124f3eb5384SStefan Weinhuber sector_t recid; 21251da177e4SLinus Torvalds unsigned char cmd, rcmd; 21268e09f215SStefan Weinhuber int use_prefix; 21278e09f215SStefan Weinhuber struct dasd_device *basedev; 21281da177e4SLinus Torvalds 21298e09f215SStefan Weinhuber basedev = block->base; 21308e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 21311da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 21321da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_READ_MT; 21331da177e4SLinus Torvalds else if (rq_data_dir(req) == WRITE) 21341da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_WRITE_MT; 21351da177e4SLinus Torvalds else 21361da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 2137f3eb5384SStefan Weinhuber 21381da177e4SLinus Torvalds /* Check struct bio and count the number of blocks for the request. */ 21391da177e4SLinus Torvalds count = 0; 21401da177e4SLinus Torvalds cidaw = 0; 21415705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 21421da177e4SLinus Torvalds if (bv->bv_len & (blksize - 1)) 21431da177e4SLinus Torvalds /* Eckd can only do full blocks. */ 21441da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 21458e09f215SStefan Weinhuber count += bv->bv_len >> (block->s2b_shift + 9); 2146347a8dc3SMartin Schwidefsky #if defined(CONFIG_64BIT) 21476c92e699SJens Axboe if (idal_is_needed (page_address(bv->bv_page), bv->bv_len)) 21488e09f215SStefan Weinhuber cidaw += bv->bv_len >> (block->s2b_shift + 9); 21491da177e4SLinus Torvalds #endif 21501da177e4SLinus Torvalds } 21511da177e4SLinus Torvalds /* Paranoia. */ 21521da177e4SLinus Torvalds if (count != last_rec - first_rec + 1) 21531da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 21548e09f215SStefan Weinhuber 21558e09f215SStefan Weinhuber /* use the prefix command if available */ 21568e09f215SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 21578e09f215SStefan Weinhuber if (use_prefix) { 21588e09f215SStefan Weinhuber /* 1x prefix + number of blocks */ 21598e09f215SStefan Weinhuber cplength = 2 + count; 21608e09f215SStefan Weinhuber /* 1x prefix + cidaws*sizeof(long) */ 21618e09f215SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 21628e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 21638e09f215SStefan Weinhuber cidaw * sizeof(unsigned long); 21648e09f215SStefan Weinhuber } else { 21651da177e4SLinus Torvalds /* 1x define extent + 1x locate record + number of blocks */ 21661da177e4SLinus Torvalds cplength = 2 + count; 21671da177e4SLinus Torvalds /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 21688e09f215SStefan Weinhuber datasize = sizeof(struct DE_eckd_data) + 21698e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 21701da177e4SLinus Torvalds cidaw * sizeof(unsigned long); 21718e09f215SStefan Weinhuber } 21721da177e4SLinus Torvalds /* Find out the number of additional locate record ccws for cdl. */ 21731da177e4SLinus Torvalds if (private->uses_cdl && first_rec < 2*blk_per_trk) { 21741da177e4SLinus Torvalds if (last_rec >= 2*blk_per_trk) 21751da177e4SLinus Torvalds count = 2*blk_per_trk - first_rec; 21761da177e4SLinus Torvalds cplength += count; 21771da177e4SLinus Torvalds datasize += count*sizeof(struct LO_eckd_data); 21781da177e4SLinus Torvalds } 21791da177e4SLinus Torvalds /* Allocate the ccw request. */ 218068b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 218168b781feSStefan Haberland startdev); 21821da177e4SLinus Torvalds if (IS_ERR(cqr)) 21831da177e4SLinus Torvalds return cqr; 21841da177e4SLinus Torvalds ccw = cqr->cpaddr; 21858e09f215SStefan Weinhuber /* First ccw is define extent or prefix. */ 21868e09f215SStefan Weinhuber if (use_prefix) { 21878e09f215SStefan Weinhuber if (prefix(ccw++, cqr->data, first_trk, 21888e09f215SStefan Weinhuber last_trk, cmd, basedev, startdev) == -EAGAIN) { 21898e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 21908e09f215SStefan Weinhuber * Try again later. 21918e09f215SStefan Weinhuber */ 21928e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2193d54853efSMartin Schwidefsky return ERR_PTR(-EAGAIN); 2194d54853efSMartin Schwidefsky } 21958e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 21968e09f215SStefan Weinhuber sizeof(struct PFX_eckd_data)); 21978e09f215SStefan Weinhuber } else { 21988e09f215SStefan Weinhuber if (define_extent(ccw++, cqr->data, first_trk, 21998e09f215SStefan Weinhuber last_trk, cmd, startdev) == -EAGAIN) { 22008e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 22018e09f215SStefan Weinhuber * Try again later. 22028e09f215SStefan Weinhuber */ 22038e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 22048e09f215SStefan Weinhuber return ERR_PTR(-EAGAIN); 22058e09f215SStefan Weinhuber } 22068e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 22078e09f215SStefan Weinhuber sizeof(struct DE_eckd_data)); 22088e09f215SStefan Weinhuber } 22091da177e4SLinus Torvalds /* Build locate_record+read/write/ccws. */ 22101da177e4SLinus Torvalds LO_data = (struct LO_eckd_data *) (idaws + cidaw); 22111da177e4SLinus Torvalds recid = first_rec; 22121da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 22131da177e4SLinus Torvalds /* Only standard blocks so there is just one locate record. */ 22141da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 22151da177e4SLinus Torvalds locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 22168e09f215SStefan Weinhuber last_rec - recid + 1, cmd, basedev, blksize); 22171da177e4SLinus Torvalds } 22185705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 22191da177e4SLinus Torvalds dst = page_address(bv->bv_page) + bv->bv_offset; 22201da177e4SLinus Torvalds if (dasd_page_cache) { 22211da177e4SLinus Torvalds char *copy = kmem_cache_alloc(dasd_page_cache, 2222441e143eSChristoph Lameter GFP_DMA | __GFP_NOWARN); 22231da177e4SLinus Torvalds if (copy && rq_data_dir(req) == WRITE) 22241da177e4SLinus Torvalds memcpy(copy + bv->bv_offset, dst, bv->bv_len); 22251da177e4SLinus Torvalds if (copy) 22261da177e4SLinus Torvalds dst = copy + bv->bv_offset; 22271da177e4SLinus Torvalds } 22281da177e4SLinus Torvalds for (off = 0; off < bv->bv_len; off += blksize) { 22291da177e4SLinus Torvalds sector_t trkid = recid; 22301da177e4SLinus Torvalds unsigned int recoffs = sector_div(trkid, blk_per_trk); 22311da177e4SLinus Torvalds rcmd = cmd; 22321da177e4SLinus Torvalds count = blksize; 22331da177e4SLinus Torvalds /* Locate record for cdl special block ? */ 22341da177e4SLinus Torvalds if (private->uses_cdl && recid < 2*blk_per_trk) { 22351da177e4SLinus Torvalds if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 22361da177e4SLinus Torvalds rcmd |= 0x8; 22371da177e4SLinus Torvalds count = dasd_eckd_cdl_reclen(recid); 2238ec5883abSHorst Hummel if (count < blksize && 2239ec5883abSHorst Hummel rq_data_dir(req) == READ) 22401da177e4SLinus Torvalds memset(dst + count, 0xe5, 22411da177e4SLinus Torvalds blksize - count); 22421da177e4SLinus Torvalds } 22431da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 22441da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 22451da177e4SLinus Torvalds trkid, recoffs + 1, 22468e09f215SStefan Weinhuber 1, rcmd, basedev, count); 22471da177e4SLinus Torvalds } 22481da177e4SLinus Torvalds /* Locate record for standard blocks ? */ 22491da177e4SLinus Torvalds if (private->uses_cdl && recid == 2*blk_per_trk) { 22501da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 22511da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 22521da177e4SLinus Torvalds trkid, recoffs + 1, 22531da177e4SLinus Torvalds last_rec - recid + 1, 22548e09f215SStefan Weinhuber cmd, basedev, count); 22551da177e4SLinus Torvalds } 22561da177e4SLinus Torvalds /* Read/write ccw. */ 22571da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 22581da177e4SLinus Torvalds ccw->cmd_code = rcmd; 22591da177e4SLinus Torvalds ccw->count = count; 22601da177e4SLinus Torvalds if (idal_is_needed(dst, blksize)) { 22611da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) idaws; 22621da177e4SLinus Torvalds ccw->flags = CCW_FLAG_IDA; 22631da177e4SLinus Torvalds idaws = idal_create_words(idaws, dst, blksize); 22641da177e4SLinus Torvalds } else { 22651da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) dst; 22661da177e4SLinus Torvalds ccw->flags = 0; 22671da177e4SLinus Torvalds } 22681da177e4SLinus Torvalds ccw++; 22691da177e4SLinus Torvalds dst += blksize; 22701da177e4SLinus Torvalds recid++; 22711da177e4SLinus Torvalds } 22721da177e4SLinus Torvalds } 227313de227bSHolger Smolinski if (blk_noretry_request(req) || 227413de227bSHolger Smolinski block->base->features & DASD_FEATURE_FAILFAST) 22751c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 22768e09f215SStefan Weinhuber cqr->startdev = startdev; 22778e09f215SStefan Weinhuber cqr->memdev = startdev; 22788e09f215SStefan Weinhuber cqr->block = block; 22797c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2280a4d26c6aSStefan Weinhuber cqr->lpm = startdev->path_data.ppm; 22811da177e4SLinus Torvalds cqr->retries = 256; 22821da177e4SLinus Torvalds cqr->buildclk = get_clock(); 22831da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 22841da177e4SLinus Torvalds return cqr; 22851da177e4SLinus Torvalds } 22861da177e4SLinus Torvalds 2287f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 2288f3eb5384SStefan Weinhuber struct dasd_device *startdev, 2289f3eb5384SStefan Weinhuber struct dasd_block *block, 2290f3eb5384SStefan Weinhuber struct request *req, 2291f3eb5384SStefan Weinhuber sector_t first_rec, 2292f3eb5384SStefan Weinhuber sector_t last_rec, 2293f3eb5384SStefan Weinhuber sector_t first_trk, 2294f3eb5384SStefan Weinhuber sector_t last_trk, 2295f3eb5384SStefan Weinhuber unsigned int first_offs, 2296f3eb5384SStefan Weinhuber unsigned int last_offs, 2297f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 2298f3eb5384SStefan Weinhuber unsigned int blksize) 2299f3eb5384SStefan Weinhuber { 2300f3eb5384SStefan Weinhuber unsigned long *idaws; 2301f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 2302f3eb5384SStefan Weinhuber struct ccw1 *ccw; 2303f3eb5384SStefan Weinhuber struct req_iterator iter; 2304f3eb5384SStefan Weinhuber struct bio_vec *bv; 2305f3eb5384SStefan Weinhuber char *dst, *idaw_dst; 2306f3eb5384SStefan Weinhuber unsigned int cidaw, cplength, datasize; 2307f3eb5384SStefan Weinhuber unsigned int tlf; 2308f3eb5384SStefan Weinhuber sector_t recid; 2309f3eb5384SStefan Weinhuber unsigned char cmd; 2310f3eb5384SStefan Weinhuber struct dasd_device *basedev; 2311f3eb5384SStefan Weinhuber unsigned int trkcount, count, count_to_trk_end; 2312f3eb5384SStefan Weinhuber unsigned int idaw_len, seg_len, part_len, len_to_track_end; 2313f3eb5384SStefan Weinhuber unsigned char new_track, end_idaw; 2314f3eb5384SStefan Weinhuber sector_t trkid; 2315f3eb5384SStefan Weinhuber unsigned int recoffs; 2316f3eb5384SStefan Weinhuber 2317f3eb5384SStefan Weinhuber basedev = block->base; 2318f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) 2319f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 2320f3eb5384SStefan Weinhuber else if (rq_data_dir(req) == WRITE) 2321f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 2322f3eb5384SStefan Weinhuber else 2323f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 2324f3eb5384SStefan Weinhuber 2325f3eb5384SStefan Weinhuber /* Track based I/O needs IDAWs for each page, and not just for 2326f3eb5384SStefan Weinhuber * 64 bit addresses. We need additional idals for pages 2327f3eb5384SStefan Weinhuber * that get filled from two tracks, so we use the number 2328f3eb5384SStefan Weinhuber * of records as upper limit. 2329f3eb5384SStefan Weinhuber */ 2330f3eb5384SStefan Weinhuber cidaw = last_rec - first_rec + 1; 2331f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 2332f3eb5384SStefan Weinhuber 2333f3eb5384SStefan Weinhuber /* 1x prefix + one read/write ccw per track */ 2334f3eb5384SStefan Weinhuber cplength = 1 + trkcount; 2335f3eb5384SStefan Weinhuber 2336f3eb5384SStefan Weinhuber /* on 31-bit we need space for two 32 bit addresses per page 2337f3eb5384SStefan Weinhuber * on 64-bit one 64 bit address 2338f3eb5384SStefan Weinhuber */ 2339f3eb5384SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 2340f3eb5384SStefan Weinhuber cidaw * sizeof(unsigned long long); 2341f3eb5384SStefan Weinhuber 2342f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 234368b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 234468b781feSStefan Haberland startdev); 2345f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 2346f3eb5384SStefan Weinhuber return cqr; 2347f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 2348f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 2349f3eb5384SStefan Weinhuber if (first_trk == last_trk) 2350f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 2351f3eb5384SStefan Weinhuber else 2352f3eb5384SStefan Weinhuber tlf = last_offs + 1; 2353f3eb5384SStefan Weinhuber tlf *= blksize; 2354f3eb5384SStefan Weinhuber 2355f3eb5384SStefan Weinhuber if (prefix_LRE(ccw++, cqr->data, first_trk, 2356f3eb5384SStefan Weinhuber last_trk, cmd, basedev, startdev, 2357f3eb5384SStefan Weinhuber 1 /* format */, first_offs + 1, 2358f3eb5384SStefan Weinhuber trkcount, blksize, 2359f3eb5384SStefan Weinhuber tlf) == -EAGAIN) { 2360f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 2361f3eb5384SStefan Weinhuber * Try again later. 2362f3eb5384SStefan Weinhuber */ 2363f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2364f3eb5384SStefan Weinhuber return ERR_PTR(-EAGAIN); 2365f3eb5384SStefan Weinhuber } 2366f3eb5384SStefan Weinhuber 2367f3eb5384SStefan Weinhuber /* 2368f3eb5384SStefan Weinhuber * The translation of request into ccw programs must meet the 2369f3eb5384SStefan Weinhuber * following conditions: 2370f3eb5384SStefan Weinhuber * - all idaws but the first and the last must address full pages 2371f3eb5384SStefan Weinhuber * (or 2K blocks on 31-bit) 2372f3eb5384SStefan Weinhuber * - the scope of a ccw and it's idal ends with the track boundaries 2373f3eb5384SStefan Weinhuber */ 2374f3eb5384SStefan Weinhuber idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); 2375f3eb5384SStefan Weinhuber recid = first_rec; 2376f3eb5384SStefan Weinhuber new_track = 1; 2377f3eb5384SStefan Weinhuber end_idaw = 0; 2378f3eb5384SStefan Weinhuber len_to_track_end = 0; 2379f3eb5384SStefan Weinhuber idaw_dst = 0; 2380f3eb5384SStefan Weinhuber idaw_len = 0; 2381f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 2382f3eb5384SStefan Weinhuber dst = page_address(bv->bv_page) + bv->bv_offset; 2383f3eb5384SStefan Weinhuber seg_len = bv->bv_len; 2384f3eb5384SStefan Weinhuber while (seg_len) { 2385f3eb5384SStefan Weinhuber if (new_track) { 2386f3eb5384SStefan Weinhuber trkid = recid; 2387f3eb5384SStefan Weinhuber recoffs = sector_div(trkid, blk_per_trk); 2388f3eb5384SStefan Weinhuber count_to_trk_end = blk_per_trk - recoffs; 2389f3eb5384SStefan Weinhuber count = min((last_rec - recid + 1), 2390f3eb5384SStefan Weinhuber (sector_t)count_to_trk_end); 2391f3eb5384SStefan Weinhuber len_to_track_end = count * blksize; 2392f3eb5384SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 2393f3eb5384SStefan Weinhuber ccw->cmd_code = cmd; 2394f3eb5384SStefan Weinhuber ccw->count = len_to_track_end; 2395f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 2396f3eb5384SStefan Weinhuber ccw->flags = CCW_FLAG_IDA; 2397f3eb5384SStefan Weinhuber ccw++; 2398f3eb5384SStefan Weinhuber recid += count; 2399f3eb5384SStefan Weinhuber new_track = 0; 240052db45c3SStefan Weinhuber /* first idaw for a ccw may start anywhere */ 240152db45c3SStefan Weinhuber if (!idaw_dst) 240252db45c3SStefan Weinhuber idaw_dst = dst; 2403f3eb5384SStefan Weinhuber } 240452db45c3SStefan Weinhuber /* If we start a new idaw, we must make sure that it 240552db45c3SStefan Weinhuber * starts on an IDA_BLOCK_SIZE boundary. 2406f3eb5384SStefan Weinhuber * If we continue an idaw, we must make sure that the 2407f3eb5384SStefan Weinhuber * current segment begins where the so far accumulated 2408f3eb5384SStefan Weinhuber * idaw ends 2409f3eb5384SStefan Weinhuber */ 241052db45c3SStefan Weinhuber if (!idaw_dst) { 241152db45c3SStefan Weinhuber if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { 241252db45c3SStefan Weinhuber dasd_sfree_request(cqr, startdev); 241352db45c3SStefan Weinhuber return ERR_PTR(-ERANGE); 241452db45c3SStefan Weinhuber } else 2415f3eb5384SStefan Weinhuber idaw_dst = dst; 241652db45c3SStefan Weinhuber } 2417f3eb5384SStefan Weinhuber if ((idaw_dst + idaw_len) != dst) { 2418f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2419f3eb5384SStefan Weinhuber return ERR_PTR(-ERANGE); 2420f3eb5384SStefan Weinhuber } 2421f3eb5384SStefan Weinhuber part_len = min(seg_len, len_to_track_end); 2422f3eb5384SStefan Weinhuber seg_len -= part_len; 2423f3eb5384SStefan Weinhuber dst += part_len; 2424f3eb5384SStefan Weinhuber idaw_len += part_len; 2425f3eb5384SStefan Weinhuber len_to_track_end -= part_len; 2426f3eb5384SStefan Weinhuber /* collected memory area ends on an IDA_BLOCK border, 2427f3eb5384SStefan Weinhuber * -> create an idaw 2428f3eb5384SStefan Weinhuber * idal_create_words will handle cases where idaw_len 2429f3eb5384SStefan Weinhuber * is larger then IDA_BLOCK_SIZE 2430f3eb5384SStefan Weinhuber */ 2431f3eb5384SStefan Weinhuber if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) 2432f3eb5384SStefan Weinhuber end_idaw = 1; 2433f3eb5384SStefan Weinhuber /* We also need to end the idaw at track end */ 2434f3eb5384SStefan Weinhuber if (!len_to_track_end) { 2435f3eb5384SStefan Weinhuber new_track = 1; 2436f3eb5384SStefan Weinhuber end_idaw = 1; 2437f3eb5384SStefan Weinhuber } 2438f3eb5384SStefan Weinhuber if (end_idaw) { 2439f3eb5384SStefan Weinhuber idaws = idal_create_words(idaws, idaw_dst, 2440f3eb5384SStefan Weinhuber idaw_len); 2441f3eb5384SStefan Weinhuber idaw_dst = 0; 2442f3eb5384SStefan Weinhuber idaw_len = 0; 2443f3eb5384SStefan Weinhuber end_idaw = 0; 2444f3eb5384SStefan Weinhuber } 2445f3eb5384SStefan Weinhuber } 2446f3eb5384SStefan Weinhuber } 2447f3eb5384SStefan Weinhuber 2448f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 2449f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 2450f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2451f3eb5384SStefan Weinhuber cqr->startdev = startdev; 2452f3eb5384SStefan Weinhuber cqr->memdev = startdev; 2453f3eb5384SStefan Weinhuber cqr->block = block; 24547c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2455a4d26c6aSStefan Weinhuber cqr->lpm = startdev->path_data.ppm; 2456f3eb5384SStefan Weinhuber cqr->retries = 256; 2457f3eb5384SStefan Weinhuber cqr->buildclk = get_clock(); 2458f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 2459f3eb5384SStefan Weinhuber return cqr; 2460f3eb5384SStefan Weinhuber } 2461f3eb5384SStefan Weinhuber 2462f3eb5384SStefan Weinhuber static int prepare_itcw(struct itcw *itcw, 2463f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 2464f3eb5384SStefan Weinhuber struct dasd_device *basedev, 2465f3eb5384SStefan Weinhuber struct dasd_device *startdev, 2466f3eb5384SStefan Weinhuber unsigned int rec_on_trk, int count, 2467f3eb5384SStefan Weinhuber unsigned int blksize, 2468f3eb5384SStefan Weinhuber unsigned int total_data_size, 2469f3eb5384SStefan Weinhuber unsigned int tlf, 2470f3eb5384SStefan Weinhuber unsigned int blk_per_trk) 2471f3eb5384SStefan Weinhuber { 2472f3eb5384SStefan Weinhuber struct PFX_eckd_data pfxdata; 2473f3eb5384SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 2474f3eb5384SStefan Weinhuber struct DE_eckd_data *dedata; 2475f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 2476f3eb5384SStefan Weinhuber struct dcw *dcw; 2477f3eb5384SStefan Weinhuber 2478f3eb5384SStefan Weinhuber u32 begcyl, endcyl; 2479f3eb5384SStefan Weinhuber u16 heads, beghead, endhead; 2480f3eb5384SStefan Weinhuber u8 pfx_cmd; 2481f3eb5384SStefan Weinhuber 2482f3eb5384SStefan Weinhuber int rc = 0; 2483f3eb5384SStefan Weinhuber int sector = 0; 2484f3eb5384SStefan Weinhuber int dn, d; 2485f3eb5384SStefan Weinhuber 2486f3eb5384SStefan Weinhuber 2487f3eb5384SStefan Weinhuber /* setup prefix data */ 2488f3eb5384SStefan Weinhuber basepriv = (struct dasd_eckd_private *) basedev->private; 2489f3eb5384SStefan Weinhuber startpriv = (struct dasd_eckd_private *) startdev->private; 2490f3eb5384SStefan Weinhuber dedata = &pfxdata.define_extent; 2491f3eb5384SStefan Weinhuber lredata = &pfxdata.locate_record; 2492f3eb5384SStefan Weinhuber 2493f3eb5384SStefan Weinhuber memset(&pfxdata, 0, sizeof(pfxdata)); 2494f3eb5384SStefan Weinhuber pfxdata.format = 1; /* PFX with LRE */ 2495f3eb5384SStefan Weinhuber pfxdata.base_address = basepriv->ned->unit_addr; 2496f3eb5384SStefan Weinhuber pfxdata.base_lss = basepriv->ned->ID; 2497f3eb5384SStefan Weinhuber pfxdata.validity.define_extent = 1; 2498f3eb5384SStefan Weinhuber 2499f3eb5384SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 2500f3eb5384SStefan Weinhuber if (startpriv->uid.type != UA_BASE_DEVICE) { 2501f3eb5384SStefan Weinhuber pfxdata.validity.verify_base = 1; 2502f3eb5384SStefan Weinhuber if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 2503f3eb5384SStefan Weinhuber pfxdata.validity.hyper_pav = 1; 2504f3eb5384SStefan Weinhuber } 2505f3eb5384SStefan Weinhuber 2506f3eb5384SStefan Weinhuber switch (cmd) { 2507f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 2508f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 2509f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 2510f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 2511f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 2512f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 2513f3eb5384SStefan Weinhuber lredata->operation.operation = 0x0C; 2514f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x01; 2515f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX_READ; 2516f3eb5384SStefan Weinhuber break; 2517f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 2518f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 2519f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 2520f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 2521f3eb5384SStefan Weinhuber rc = check_XRC_on_prefix(&pfxdata, basedev); 2522f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 2523f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 2524f3eb5384SStefan Weinhuber lredata->operation.operation = 0x3F; 2525f3eb5384SStefan Weinhuber lredata->extended_operation = 0x23; 2526f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x2; 2527f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX; 2528f3eb5384SStefan Weinhuber break; 2529f3eb5384SStefan Weinhuber default: 2530f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 2531f3eb5384SStefan Weinhuber "prepare itcw, unknown opcode 0x%x", cmd); 2532f3eb5384SStefan Weinhuber BUG(); 2533f3eb5384SStefan Weinhuber break; 2534f3eb5384SStefan Weinhuber } 2535f3eb5384SStefan Weinhuber if (rc) 2536f3eb5384SStefan Weinhuber return rc; 2537f3eb5384SStefan Weinhuber 2538f3eb5384SStefan Weinhuber dedata->attributes.mode = 0x3; /* ECKD */ 2539f3eb5384SStefan Weinhuber 2540f3eb5384SStefan Weinhuber heads = basepriv->rdc_data.trk_per_cyl; 2541f3eb5384SStefan Weinhuber begcyl = trk / heads; 2542f3eb5384SStefan Weinhuber beghead = trk % heads; 2543f3eb5384SStefan Weinhuber endcyl = totrk / heads; 2544f3eb5384SStefan Weinhuber endhead = totrk % heads; 2545f3eb5384SStefan Weinhuber 2546f3eb5384SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 2547f3eb5384SStefan Weinhuber if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 2548f3eb5384SStefan Weinhuber dedata->attributes.operation == DASD_SEQ_ACCESS) { 2549f3eb5384SStefan Weinhuber 2550f3eb5384SStefan Weinhuber if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 2551f3eb5384SStefan Weinhuber endcyl += basepriv->attrib.nr_cyl; 2552f3eb5384SStefan Weinhuber else 2553f3eb5384SStefan Weinhuber endcyl = (basepriv->real_cyl - 1); 2554f3eb5384SStefan Weinhuber } 2555f3eb5384SStefan Weinhuber 2556f3eb5384SStefan Weinhuber set_ch_t(&dedata->beg_ext, begcyl, beghead); 2557f3eb5384SStefan Weinhuber set_ch_t(&dedata->end_ext, endcyl, endhead); 2558f3eb5384SStefan Weinhuber 2559f3eb5384SStefan Weinhuber dedata->ep_format = 0x20; /* records per track is valid */ 2560f3eb5384SStefan Weinhuber dedata->ep_rec_per_track = blk_per_trk; 2561f3eb5384SStefan Weinhuber 2562f3eb5384SStefan Weinhuber if (rec_on_trk) { 2563f3eb5384SStefan Weinhuber switch (basepriv->rdc_data.dev_type) { 2564f3eb5384SStefan Weinhuber case 0x3390: 2565f3eb5384SStefan Weinhuber dn = ceil_quot(blksize + 6, 232); 2566f3eb5384SStefan Weinhuber d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); 2567f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 2568f3eb5384SStefan Weinhuber break; 2569f3eb5384SStefan Weinhuber case 0x3380: 2570f3eb5384SStefan Weinhuber d = 7 + ceil_quot(blksize + 12, 32); 2571f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 2572f3eb5384SStefan Weinhuber break; 2573f3eb5384SStefan Weinhuber } 2574f3eb5384SStefan Weinhuber } 2575f3eb5384SStefan Weinhuber 2576f3eb5384SStefan Weinhuber lredata->auxiliary.length_valid = 1; 2577f3eb5384SStefan Weinhuber lredata->auxiliary.length_scope = 1; 2578f3eb5384SStefan Weinhuber lredata->auxiliary.imbedded_ccw_valid = 1; 2579f3eb5384SStefan Weinhuber lredata->length = tlf; 2580f3eb5384SStefan Weinhuber lredata->imbedded_ccw = cmd; 2581f3eb5384SStefan Weinhuber lredata->count = count; 2582f3eb5384SStefan Weinhuber lredata->sector = sector; 2583f3eb5384SStefan Weinhuber set_ch_t(&lredata->seek_addr, begcyl, beghead); 2584f3eb5384SStefan Weinhuber lredata->search_arg.cyl = lredata->seek_addr.cyl; 2585f3eb5384SStefan Weinhuber lredata->search_arg.head = lredata->seek_addr.head; 2586f3eb5384SStefan Weinhuber lredata->search_arg.record = rec_on_trk; 2587f3eb5384SStefan Weinhuber 2588f3eb5384SStefan Weinhuber dcw = itcw_add_dcw(itcw, pfx_cmd, 0, 2589f3eb5384SStefan Weinhuber &pfxdata, sizeof(pfxdata), total_data_size); 2590364c18d8SHeiko Carstens return IS_ERR(dcw) ? PTR_ERR(dcw) : 0; 2591f3eb5384SStefan Weinhuber } 2592f3eb5384SStefan Weinhuber 2593f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 2594f3eb5384SStefan Weinhuber struct dasd_device *startdev, 2595f3eb5384SStefan Weinhuber struct dasd_block *block, 2596f3eb5384SStefan Weinhuber struct request *req, 2597f3eb5384SStefan Weinhuber sector_t first_rec, 2598f3eb5384SStefan Weinhuber sector_t last_rec, 2599f3eb5384SStefan Weinhuber sector_t first_trk, 2600f3eb5384SStefan Weinhuber sector_t last_trk, 2601f3eb5384SStefan Weinhuber unsigned int first_offs, 2602f3eb5384SStefan Weinhuber unsigned int last_offs, 2603f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 2604f3eb5384SStefan Weinhuber unsigned int blksize) 2605f3eb5384SStefan Weinhuber { 2606f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 2607f3eb5384SStefan Weinhuber struct req_iterator iter; 2608f3eb5384SStefan Weinhuber struct bio_vec *bv; 2609f3eb5384SStefan Weinhuber char *dst; 2610f3eb5384SStefan Weinhuber unsigned int trkcount, ctidaw; 2611f3eb5384SStefan Weinhuber unsigned char cmd; 2612f3eb5384SStefan Weinhuber struct dasd_device *basedev; 2613f3eb5384SStefan Weinhuber unsigned int tlf; 2614f3eb5384SStefan Weinhuber struct itcw *itcw; 2615f3eb5384SStefan Weinhuber struct tidaw *last_tidaw = NULL; 2616f3eb5384SStefan Weinhuber int itcw_op; 2617f3eb5384SStefan Weinhuber size_t itcw_size; 2618ef19298bSStefan Weinhuber u8 tidaw_flags; 2619ef19298bSStefan Weinhuber unsigned int seg_len, part_len, len_to_track_end; 2620ef19298bSStefan Weinhuber unsigned char new_track; 2621ef19298bSStefan Weinhuber sector_t recid, trkid; 2622ef19298bSStefan Weinhuber unsigned int offs; 2623ef19298bSStefan Weinhuber unsigned int count, count_to_trk_end; 2624f3eb5384SStefan Weinhuber 2625f3eb5384SStefan Weinhuber basedev = block->base; 2626f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) { 2627f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 2628f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_READ; 2629f3eb5384SStefan Weinhuber } else if (rq_data_dir(req) == WRITE) { 2630f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 2631f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_WRITE; 2632f3eb5384SStefan Weinhuber } else 2633f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 2634f3eb5384SStefan Weinhuber 2635f3eb5384SStefan Weinhuber /* trackbased I/O needs address all memory via TIDAWs, 2636f3eb5384SStefan Weinhuber * not just for 64 bit addresses. This allows us to map 2637f3eb5384SStefan Weinhuber * each segment directly to one tidaw. 2638ef19298bSStefan Weinhuber * In the case of write requests, additional tidaws may 2639ef19298bSStefan Weinhuber * be needed when a segment crosses a track boundary. 2640f3eb5384SStefan Weinhuber */ 2641f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 2642f3eb5384SStefan Weinhuber ctidaw = 0; 2643f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 2644f3eb5384SStefan Weinhuber ++ctidaw; 2645f3eb5384SStefan Weinhuber } 2646ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 2647ef19298bSStefan Weinhuber ctidaw += (last_trk - first_trk); 2648f3eb5384SStefan Weinhuber 2649f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 2650f3eb5384SStefan Weinhuber itcw_size = itcw_calc_size(0, ctidaw, 0); 265168b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 2652f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 2653f3eb5384SStefan Weinhuber return cqr; 2654f3eb5384SStefan Weinhuber 2655f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 2656f3eb5384SStefan Weinhuber if (first_trk == last_trk) 2657f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 2658f3eb5384SStefan Weinhuber else 2659f3eb5384SStefan Weinhuber tlf = last_offs + 1; 2660f3eb5384SStefan Weinhuber tlf *= blksize; 2661f3eb5384SStefan Weinhuber 2662f3eb5384SStefan Weinhuber itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); 2663ef19298bSStefan Weinhuber if (IS_ERR(itcw)) { 2664ef19298bSStefan Weinhuber dasd_sfree_request(cqr, startdev); 2665ef19298bSStefan Weinhuber return ERR_PTR(-EINVAL); 2666ef19298bSStefan Weinhuber } 2667f3eb5384SStefan Weinhuber cqr->cpaddr = itcw_get_tcw(itcw); 2668f3eb5384SStefan Weinhuber if (prepare_itcw(itcw, first_trk, last_trk, 2669f3eb5384SStefan Weinhuber cmd, basedev, startdev, 2670f3eb5384SStefan Weinhuber first_offs + 1, 2671f3eb5384SStefan Weinhuber trkcount, blksize, 2672f3eb5384SStefan Weinhuber (last_rec - first_rec + 1) * blksize, 2673f3eb5384SStefan Weinhuber tlf, blk_per_trk) == -EAGAIN) { 2674f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 2675f3eb5384SStefan Weinhuber * Try again later. 2676f3eb5384SStefan Weinhuber */ 2677f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2678f3eb5384SStefan Weinhuber return ERR_PTR(-EAGAIN); 2679f3eb5384SStefan Weinhuber } 2680d54cddb6SHeiko Carstens len_to_track_end = 0; 2681f3eb5384SStefan Weinhuber /* 2682f3eb5384SStefan Weinhuber * A tidaw can address 4k of memory, but must not cross page boundaries 2683f3eb5384SStefan Weinhuber * We can let the block layer handle this by setting 2684f3eb5384SStefan Weinhuber * blk_queue_segment_boundary to page boundaries and 2685f3eb5384SStefan Weinhuber * blk_max_segment_size to page size when setting up the request queue. 2686ef19298bSStefan Weinhuber * For write requests, a TIDAW must not cross track boundaries, because 2687ef19298bSStefan Weinhuber * we have to set the CBC flag on the last tidaw for each track. 2688f3eb5384SStefan Weinhuber */ 2689ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) { 2690ef19298bSStefan Weinhuber new_track = 1; 2691ef19298bSStefan Weinhuber recid = first_rec; 2692f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 2693f3eb5384SStefan Weinhuber dst = page_address(bv->bv_page) + bv->bv_offset; 2694ef19298bSStefan Weinhuber seg_len = bv->bv_len; 2695ef19298bSStefan Weinhuber while (seg_len) { 2696ef19298bSStefan Weinhuber if (new_track) { 2697ef19298bSStefan Weinhuber trkid = recid; 2698ef19298bSStefan Weinhuber offs = sector_div(trkid, blk_per_trk); 2699ef19298bSStefan Weinhuber count_to_trk_end = blk_per_trk - offs; 2700ef19298bSStefan Weinhuber count = min((last_rec - recid + 1), 2701ef19298bSStefan Weinhuber (sector_t)count_to_trk_end); 2702ef19298bSStefan Weinhuber len_to_track_end = count * blksize; 2703ef19298bSStefan Weinhuber recid += count; 2704ef19298bSStefan Weinhuber new_track = 0; 2705f3eb5384SStefan Weinhuber } 2706ef19298bSStefan Weinhuber part_len = min(seg_len, len_to_track_end); 2707ef19298bSStefan Weinhuber seg_len -= part_len; 2708ef19298bSStefan Weinhuber len_to_track_end -= part_len; 2709ef19298bSStefan Weinhuber /* We need to end the tidaw at track end */ 2710ef19298bSStefan Weinhuber if (!len_to_track_end) { 2711ef19298bSStefan Weinhuber new_track = 1; 2712ef19298bSStefan Weinhuber tidaw_flags = TIDAW_FLAGS_INSERT_CBC; 2713ef19298bSStefan Weinhuber } else 2714ef19298bSStefan Weinhuber tidaw_flags = 0; 2715ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, 2716ef19298bSStefan Weinhuber dst, part_len); 2717ef19298bSStefan Weinhuber if (IS_ERR(last_tidaw)) 2718ef19298bSStefan Weinhuber return ERR_PTR(-EINVAL); 2719ef19298bSStefan Weinhuber dst += part_len; 2720ef19298bSStefan Weinhuber } 2721ef19298bSStefan Weinhuber } 2722ef19298bSStefan Weinhuber } else { 2723ef19298bSStefan Weinhuber rq_for_each_segment(bv, req, iter) { 2724ef19298bSStefan Weinhuber dst = page_address(bv->bv_page) + bv->bv_offset; 2725ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, 0x00, 2726ef19298bSStefan Weinhuber dst, bv->bv_len); 2727ef19298bSStefan Weinhuber if (IS_ERR(last_tidaw)) 2728ef19298bSStefan Weinhuber return ERR_PTR(-EINVAL); 2729ef19298bSStefan Weinhuber } 2730ef19298bSStefan Weinhuber } 2731ef19298bSStefan Weinhuber last_tidaw->flags |= TIDAW_FLAGS_LAST; 2732ef19298bSStefan Weinhuber last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; 2733f3eb5384SStefan Weinhuber itcw_finalize(itcw); 2734f3eb5384SStefan Weinhuber 2735f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 2736f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 2737f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2738ef19298bSStefan Weinhuber cqr->cpmode = 1; 2739f3eb5384SStefan Weinhuber cqr->startdev = startdev; 2740f3eb5384SStefan Weinhuber cqr->memdev = startdev; 2741f3eb5384SStefan Weinhuber cqr->block = block; 27427c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2743a4d26c6aSStefan Weinhuber cqr->lpm = startdev->path_data.ppm; 2744f3eb5384SStefan Weinhuber cqr->retries = 256; 2745f3eb5384SStefan Weinhuber cqr->buildclk = get_clock(); 2746f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 2747f3eb5384SStefan Weinhuber return cqr; 2748f3eb5384SStefan Weinhuber } 2749f3eb5384SStefan Weinhuber 2750f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 2751f3eb5384SStefan Weinhuber struct dasd_block *block, 2752f3eb5384SStefan Weinhuber struct request *req) 2753f3eb5384SStefan Weinhuber { 2754ef19298bSStefan Weinhuber int cmdrtd, cmdwtd; 2755f3eb5384SStefan Weinhuber int use_prefix; 2756ef19298bSStefan Weinhuber int fcx_multitrack; 275745b44d76SStefan Weinhuber struct dasd_eckd_private *private; 2758f3eb5384SStefan Weinhuber struct dasd_device *basedev; 2759f3eb5384SStefan Weinhuber sector_t first_rec, last_rec; 2760f3eb5384SStefan Weinhuber sector_t first_trk, last_trk; 2761f3eb5384SStefan Weinhuber unsigned int first_offs, last_offs; 2762f3eb5384SStefan Weinhuber unsigned int blk_per_trk, blksize; 2763f3eb5384SStefan Weinhuber int cdlspecial; 2764ef19298bSStefan Weinhuber unsigned int data_size; 2765f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 2766f3eb5384SStefan Weinhuber 2767f3eb5384SStefan Weinhuber basedev = block->base; 2768f3eb5384SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 2769f3eb5384SStefan Weinhuber 2770f3eb5384SStefan Weinhuber /* Calculate number of blocks/records per track. */ 2771f3eb5384SStefan Weinhuber blksize = block->bp_block; 2772f3eb5384SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 27736fca97a9SStefan Haberland if (blk_per_trk == 0) 27746fca97a9SStefan Haberland return ERR_PTR(-EINVAL); 2775f3eb5384SStefan Weinhuber /* Calculate record id of first and last block. */ 277683096ebfSTejun Heo first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; 2777f3eb5384SStefan Weinhuber first_offs = sector_div(first_trk, blk_per_trk); 2778f3eb5384SStefan Weinhuber last_rec = last_trk = 277983096ebfSTejun Heo (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 2780f3eb5384SStefan Weinhuber last_offs = sector_div(last_trk, blk_per_trk); 2781f3eb5384SStefan Weinhuber cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); 2782f3eb5384SStefan Weinhuber 2783ef19298bSStefan Weinhuber fcx_multitrack = private->features.feature[40] & 0x20; 2784ef19298bSStefan Weinhuber data_size = blk_rq_bytes(req); 2785ef19298bSStefan Weinhuber /* tpm write request add CBC data on each track boundary */ 2786ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 2787ef19298bSStefan Weinhuber data_size += (last_trk - first_trk) * 4; 2788f3eb5384SStefan Weinhuber 2789f3eb5384SStefan Weinhuber /* is read track data and write track data in command mode supported? */ 2790f3eb5384SStefan Weinhuber cmdrtd = private->features.feature[9] & 0x20; 2791f3eb5384SStefan Weinhuber cmdwtd = private->features.feature[12] & 0x40; 2792f3eb5384SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 2793f3eb5384SStefan Weinhuber 2794f3eb5384SStefan Weinhuber cqr = NULL; 2795f3eb5384SStefan Weinhuber if (cdlspecial || dasd_page_cache) { 2796f3eb5384SStefan Weinhuber /* do nothing, just fall through to the cmd mode single case */ 2797ef19298bSStefan Weinhuber } else if ((data_size <= private->fcx_max_data) 2798ef19298bSStefan Weinhuber && (fcx_multitrack || (first_trk == last_trk))) { 2799f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, 2800f3eb5384SStefan Weinhuber first_rec, last_rec, 2801f3eb5384SStefan Weinhuber first_trk, last_trk, 2802f3eb5384SStefan Weinhuber first_offs, last_offs, 2803f3eb5384SStefan Weinhuber blk_per_trk, blksize); 2804ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 2805ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 2806f3eb5384SStefan Weinhuber cqr = NULL; 2807f3eb5384SStefan Weinhuber } else if (use_prefix && 2808f3eb5384SStefan Weinhuber (((rq_data_dir(req) == READ) && cmdrtd) || 2809f3eb5384SStefan Weinhuber ((rq_data_dir(req) == WRITE) && cmdwtd))) { 2810f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, 2811f3eb5384SStefan Weinhuber first_rec, last_rec, 2812f3eb5384SStefan Weinhuber first_trk, last_trk, 2813f3eb5384SStefan Weinhuber first_offs, last_offs, 2814f3eb5384SStefan Weinhuber blk_per_trk, blksize); 2815ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 2816ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 2817f3eb5384SStefan Weinhuber cqr = NULL; 2818f3eb5384SStefan Weinhuber } 2819f3eb5384SStefan Weinhuber if (!cqr) 2820f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, 2821f3eb5384SStefan Weinhuber first_rec, last_rec, 2822f3eb5384SStefan Weinhuber first_trk, last_trk, 2823f3eb5384SStefan Weinhuber first_offs, last_offs, 2824f3eb5384SStefan Weinhuber blk_per_trk, blksize); 2825f3eb5384SStefan Weinhuber return cqr; 2826f3eb5384SStefan Weinhuber } 2827f3eb5384SStefan Weinhuber 2828e4dbb0f2SStefan Haberland static struct dasd_ccw_req *dasd_raw_build_cp(struct dasd_device *startdev, 2829e4dbb0f2SStefan Haberland struct dasd_block *block, 2830e4dbb0f2SStefan Haberland struct request *req) 2831e4dbb0f2SStefan Haberland { 2832e4dbb0f2SStefan Haberland unsigned long *idaws; 2833e4dbb0f2SStefan Haberland struct dasd_device *basedev; 2834e4dbb0f2SStefan Haberland struct dasd_ccw_req *cqr; 2835e4dbb0f2SStefan Haberland struct ccw1 *ccw; 2836e4dbb0f2SStefan Haberland struct req_iterator iter; 2837e4dbb0f2SStefan Haberland struct bio_vec *bv; 2838e4dbb0f2SStefan Haberland char *dst; 2839e4dbb0f2SStefan Haberland unsigned char cmd; 2840e4dbb0f2SStefan Haberland unsigned int trkcount; 2841e4dbb0f2SStefan Haberland unsigned int seg_len, len_to_track_end; 2842e4dbb0f2SStefan Haberland unsigned int first_offs; 2843e4dbb0f2SStefan Haberland unsigned int cidaw, cplength, datasize; 2844e4dbb0f2SStefan Haberland sector_t first_trk, last_trk; 2845e4dbb0f2SStefan Haberland unsigned int pfx_datasize; 2846e4dbb0f2SStefan Haberland 2847e4dbb0f2SStefan Haberland /* 2848e4dbb0f2SStefan Haberland * raw track access needs to be mutiple of 64k and on 64k boundary 2849e4dbb0f2SStefan Haberland */ 2850e4dbb0f2SStefan Haberland if ((blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK) != 0) { 2851e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EINVAL); 2852e4dbb0f2SStefan Haberland goto out; 2853e4dbb0f2SStefan Haberland } 2854e4dbb0f2SStefan Haberland if (((blk_rq_pos(req) + blk_rq_sectors(req)) % 2855e4dbb0f2SStefan Haberland DASD_RAW_SECTORS_PER_TRACK) != 0) { 2856e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EINVAL); 2857e4dbb0f2SStefan Haberland goto out; 2858e4dbb0f2SStefan Haberland } 2859e4dbb0f2SStefan Haberland 2860e4dbb0f2SStefan Haberland first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; 2861e4dbb0f2SStefan Haberland last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / 2862e4dbb0f2SStefan Haberland DASD_RAW_SECTORS_PER_TRACK; 2863e4dbb0f2SStefan Haberland trkcount = last_trk - first_trk + 1; 2864e4dbb0f2SStefan Haberland first_offs = 0; 2865e4dbb0f2SStefan Haberland basedev = block->base; 2866e4dbb0f2SStefan Haberland 2867e4dbb0f2SStefan Haberland if (rq_data_dir(req) == READ) 2868e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_READ_TRACK; 2869e4dbb0f2SStefan Haberland else if (rq_data_dir(req) == WRITE) 2870e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; 2871e4dbb0f2SStefan Haberland else { 2872e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EINVAL); 2873e4dbb0f2SStefan Haberland goto out; 2874e4dbb0f2SStefan Haberland } 2875e4dbb0f2SStefan Haberland 2876e4dbb0f2SStefan Haberland /* 2877e4dbb0f2SStefan Haberland * Raw track based I/O needs IDAWs for each page, 2878e4dbb0f2SStefan Haberland * and not just for 64 bit addresses. 2879e4dbb0f2SStefan Haberland */ 2880e4dbb0f2SStefan Haberland cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; 2881e4dbb0f2SStefan Haberland 2882e4dbb0f2SStefan Haberland /* 1x prefix + one read/write ccw per track */ 2883e4dbb0f2SStefan Haberland cplength = 1 + trkcount; 2884e4dbb0f2SStefan Haberland 2885e4dbb0f2SStefan Haberland /* 2886e4dbb0f2SStefan Haberland * struct PFX_eckd_data has up to 2 byte as extended parameter 2887e4dbb0f2SStefan Haberland * this is needed for write full track and has to be mentioned 288825985edcSLucas De Marchi * separately 2889e4dbb0f2SStefan Haberland * add 8 instead of 2 to keep 8 byte boundary 2890e4dbb0f2SStefan Haberland */ 2891e4dbb0f2SStefan Haberland pfx_datasize = sizeof(struct PFX_eckd_data) + 8; 2892e4dbb0f2SStefan Haberland 2893e4dbb0f2SStefan Haberland datasize = pfx_datasize + cidaw * sizeof(unsigned long long); 2894e4dbb0f2SStefan Haberland 2895e4dbb0f2SStefan Haberland /* Allocate the ccw request. */ 2896e4dbb0f2SStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 2897e4dbb0f2SStefan Haberland datasize, startdev); 2898e4dbb0f2SStefan Haberland if (IS_ERR(cqr)) 2899e4dbb0f2SStefan Haberland goto out; 2900e4dbb0f2SStefan Haberland ccw = cqr->cpaddr; 2901e4dbb0f2SStefan Haberland 2902e4dbb0f2SStefan Haberland if (prefix_LRE(ccw++, cqr->data, first_trk, last_trk, cmd, 2903e4dbb0f2SStefan Haberland basedev, startdev, 1 /* format */, first_offs + 1, 2904e4dbb0f2SStefan Haberland trkcount, 0, 0) == -EAGAIN) { 2905e4dbb0f2SStefan Haberland /* Clock not in sync and XRC is enabled. 2906e4dbb0f2SStefan Haberland * Try again later. 2907e4dbb0f2SStefan Haberland */ 2908e4dbb0f2SStefan Haberland dasd_sfree_request(cqr, startdev); 2909e4dbb0f2SStefan Haberland cqr = ERR_PTR(-EAGAIN); 2910e4dbb0f2SStefan Haberland goto out; 2911e4dbb0f2SStefan Haberland } 2912e4dbb0f2SStefan Haberland 2913e4dbb0f2SStefan Haberland idaws = (unsigned long *)(cqr->data + pfx_datasize); 2914e4dbb0f2SStefan Haberland 2915e4dbb0f2SStefan Haberland len_to_track_end = 0; 2916e4dbb0f2SStefan Haberland 2917e4dbb0f2SStefan Haberland rq_for_each_segment(bv, req, iter) { 2918e4dbb0f2SStefan Haberland dst = page_address(bv->bv_page) + bv->bv_offset; 2919e4dbb0f2SStefan Haberland seg_len = bv->bv_len; 2920e4dbb0f2SStefan Haberland if (!len_to_track_end) { 2921e4dbb0f2SStefan Haberland ccw[-1].flags |= CCW_FLAG_CC; 2922e4dbb0f2SStefan Haberland ccw->cmd_code = cmd; 2923e4dbb0f2SStefan Haberland /* maximum 3390 track size */ 2924e4dbb0f2SStefan Haberland ccw->count = 57326; 2925e4dbb0f2SStefan Haberland /* 64k map to one track */ 2926e4dbb0f2SStefan Haberland len_to_track_end = 65536; 2927e4dbb0f2SStefan Haberland ccw->cda = (__u32)(addr_t)idaws; 2928e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_IDA; 2929e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 2930e4dbb0f2SStefan Haberland ccw++; 2931e4dbb0f2SStefan Haberland } 2932e4dbb0f2SStefan Haberland len_to_track_end -= seg_len; 2933e4dbb0f2SStefan Haberland idaws = idal_create_words(idaws, dst, seg_len); 2934e4dbb0f2SStefan Haberland } 2935e4dbb0f2SStefan Haberland 2936e4dbb0f2SStefan Haberland if (blk_noretry_request(req) || 2937e4dbb0f2SStefan Haberland block->base->features & DASD_FEATURE_FAILFAST) 2938e4dbb0f2SStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2939e4dbb0f2SStefan Haberland cqr->startdev = startdev; 2940e4dbb0f2SStefan Haberland cqr->memdev = startdev; 2941e4dbb0f2SStefan Haberland cqr->block = block; 2942e4dbb0f2SStefan Haberland cqr->expires = startdev->default_expires * HZ; 2943e4dbb0f2SStefan Haberland cqr->lpm = startdev->path_data.ppm; 2944e4dbb0f2SStefan Haberland cqr->retries = 256; 2945e4dbb0f2SStefan Haberland cqr->buildclk = get_clock(); 2946e4dbb0f2SStefan Haberland cqr->status = DASD_CQR_FILLED; 2947e4dbb0f2SStefan Haberland 2948e4dbb0f2SStefan Haberland if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN) 2949e4dbb0f2SStefan Haberland cqr = NULL; 2950e4dbb0f2SStefan Haberland out: 2951e4dbb0f2SStefan Haberland return cqr; 2952e4dbb0f2SStefan Haberland } 2953e4dbb0f2SStefan Haberland 2954e4dbb0f2SStefan Haberland 29551da177e4SLinus Torvalds static int 29561da177e4SLinus Torvalds dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 29571da177e4SLinus Torvalds { 29581da177e4SLinus Torvalds struct dasd_eckd_private *private; 29591da177e4SLinus Torvalds struct ccw1 *ccw; 29605705f702SNeilBrown struct req_iterator iter; 29611da177e4SLinus Torvalds struct bio_vec *bv; 29621da177e4SLinus Torvalds char *dst, *cda; 29631da177e4SLinus Torvalds unsigned int blksize, blk_per_trk, off; 29641da177e4SLinus Torvalds sector_t recid; 29655705f702SNeilBrown int status; 29661da177e4SLinus Torvalds 29671da177e4SLinus Torvalds if (!dasd_page_cache) 29681da177e4SLinus Torvalds goto out; 29698e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) cqr->block->base->private; 29708e09f215SStefan Weinhuber blksize = cqr->block->bp_block; 29711da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 297283096ebfSTejun Heo recid = blk_rq_pos(req) >> cqr->block->s2b_shift; 29731da177e4SLinus Torvalds ccw = cqr->cpaddr; 29741da177e4SLinus Torvalds /* Skip over define extent & locate record. */ 29751da177e4SLinus Torvalds ccw++; 29761da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 29771da177e4SLinus Torvalds ccw++; 29785705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 29791da177e4SLinus Torvalds dst = page_address(bv->bv_page) + bv->bv_offset; 29801da177e4SLinus Torvalds for (off = 0; off < bv->bv_len; off += blksize) { 29811da177e4SLinus Torvalds /* Skip locate record. */ 29821da177e4SLinus Torvalds if (private->uses_cdl && recid <= 2*blk_per_trk) 29831da177e4SLinus Torvalds ccw++; 29841da177e4SLinus Torvalds if (dst) { 29851da177e4SLinus Torvalds if (ccw->flags & CCW_FLAG_IDA) 29861da177e4SLinus Torvalds cda = *((char **)((addr_t) ccw->cda)); 29871da177e4SLinus Torvalds else 29881da177e4SLinus Torvalds cda = (char *)((addr_t) ccw->cda); 29891da177e4SLinus Torvalds if (dst != cda) { 29901da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 29911da177e4SLinus Torvalds memcpy(dst, cda, bv->bv_len); 29921da177e4SLinus Torvalds kmem_cache_free(dasd_page_cache, 29931da177e4SLinus Torvalds (void *)((addr_t)cda & PAGE_MASK)); 29941da177e4SLinus Torvalds } 29951da177e4SLinus Torvalds dst = NULL; 29961da177e4SLinus Torvalds } 29971da177e4SLinus Torvalds ccw++; 29981da177e4SLinus Torvalds recid++; 29991da177e4SLinus Torvalds } 30001da177e4SLinus Torvalds } 30011da177e4SLinus Torvalds out: 30021da177e4SLinus Torvalds status = cqr->status == DASD_CQR_DONE; 30038e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 30041da177e4SLinus Torvalds return status; 30051da177e4SLinus Torvalds } 30061da177e4SLinus Torvalds 30078e09f215SStefan Weinhuber /* 3008f3eb5384SStefan Weinhuber * Modify ccw/tcw in cqr so it can be started on a base device. 30098e09f215SStefan Weinhuber * 30108e09f215SStefan Weinhuber * Note that this is not enough to restart the cqr! 30118e09f215SStefan Weinhuber * Either reset cqr->startdev as well (summary unit check handling) 30128e09f215SStefan Weinhuber * or restart via separate cqr (as in ERP handling). 30138e09f215SStefan Weinhuber */ 30148e09f215SStefan Weinhuber void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 30158e09f215SStefan Weinhuber { 30168e09f215SStefan Weinhuber struct ccw1 *ccw; 30178e09f215SStefan Weinhuber struct PFX_eckd_data *pfxdata; 3018f3eb5384SStefan Weinhuber struct tcw *tcw; 3019f3eb5384SStefan Weinhuber struct tccb *tccb; 3020f3eb5384SStefan Weinhuber struct dcw *dcw; 30218e09f215SStefan Weinhuber 3022f3eb5384SStefan Weinhuber if (cqr->cpmode == 1) { 3023f3eb5384SStefan Weinhuber tcw = cqr->cpaddr; 3024f3eb5384SStefan Weinhuber tccb = tcw_get_tccb(tcw); 3025f3eb5384SStefan Weinhuber dcw = (struct dcw *)&tccb->tca[0]; 3026f3eb5384SStefan Weinhuber pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; 3027f3eb5384SStefan Weinhuber pfxdata->validity.verify_base = 0; 3028f3eb5384SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 3029f3eb5384SStefan Weinhuber } else { 30308e09f215SStefan Weinhuber ccw = cqr->cpaddr; 30318e09f215SStefan Weinhuber pfxdata = cqr->data; 30328e09f215SStefan Weinhuber if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 30338e09f215SStefan Weinhuber pfxdata->validity.verify_base = 0; 30348e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 30358e09f215SStefan Weinhuber } 30368e09f215SStefan Weinhuber } 3037f3eb5384SStefan Weinhuber } 30388e09f215SStefan Weinhuber 30398e09f215SStefan Weinhuber #define DASD_ECKD_CHANQ_MAX_SIZE 4 30408e09f215SStefan Weinhuber 30418e09f215SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 30428e09f215SStefan Weinhuber struct dasd_block *block, 30438e09f215SStefan Weinhuber struct request *req) 30448e09f215SStefan Weinhuber { 30458e09f215SStefan Weinhuber struct dasd_eckd_private *private; 30468e09f215SStefan Weinhuber struct dasd_device *startdev; 30478e09f215SStefan Weinhuber unsigned long flags; 30488e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 30498e09f215SStefan Weinhuber 30508e09f215SStefan Weinhuber startdev = dasd_alias_get_start_dev(base); 30518e09f215SStefan Weinhuber if (!startdev) 30528e09f215SStefan Weinhuber startdev = base; 30538e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) startdev->private; 30548e09f215SStefan Weinhuber if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 30558e09f215SStefan Weinhuber return ERR_PTR(-EBUSY); 30568e09f215SStefan Weinhuber 30578e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 30588e09f215SStefan Weinhuber private->count++; 3059e4dbb0f2SStefan Haberland if ((base->features & DASD_FEATURE_USERAW)) 3060e4dbb0f2SStefan Haberland cqr = dasd_raw_build_cp(startdev, block, req); 3061e4dbb0f2SStefan Haberland else 30628e09f215SStefan Weinhuber cqr = dasd_eckd_build_cp(startdev, block, req); 30638e09f215SStefan Weinhuber if (IS_ERR(cqr)) 30648e09f215SStefan Weinhuber private->count--; 30658e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 30668e09f215SStefan Weinhuber return cqr; 30678e09f215SStefan Weinhuber } 30688e09f215SStefan Weinhuber 30698e09f215SStefan Weinhuber static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 30708e09f215SStefan Weinhuber struct request *req) 30718e09f215SStefan Weinhuber { 30728e09f215SStefan Weinhuber struct dasd_eckd_private *private; 30738e09f215SStefan Weinhuber unsigned long flags; 30748e09f215SStefan Weinhuber 30758e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 30768e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) cqr->memdev->private; 30778e09f215SStefan Weinhuber private->count--; 30788e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 30798e09f215SStefan Weinhuber return dasd_eckd_free_cp(cqr, req); 30808e09f215SStefan Weinhuber } 30818e09f215SStefan Weinhuber 30821da177e4SLinus Torvalds static int 30831da177e4SLinus Torvalds dasd_eckd_fill_info(struct dasd_device * device, 30841da177e4SLinus Torvalds struct dasd_information2_t * info) 30851da177e4SLinus Torvalds { 30861da177e4SLinus Torvalds struct dasd_eckd_private *private; 30871da177e4SLinus Torvalds 30881da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 30891da177e4SLinus Torvalds info->label_block = 2; 30901da177e4SLinus Torvalds info->FBA_layout = private->uses_cdl ? 0 : 1; 30911da177e4SLinus Torvalds info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 30921da177e4SLinus Torvalds info->characteristics_size = sizeof(struct dasd_eckd_characteristics); 30931da177e4SLinus Torvalds memcpy(info->characteristics, &private->rdc_data, 30941da177e4SLinus Torvalds sizeof(struct dasd_eckd_characteristics)); 30954abb08c2SStefan Weinhuber info->confdata_size = min((unsigned long)private->conf_len, 30964abb08c2SStefan Weinhuber sizeof(info->configuration_data)); 30974abb08c2SStefan Weinhuber memcpy(info->configuration_data, private->conf_data, 30984abb08c2SStefan Weinhuber info->confdata_size); 30991da177e4SLinus Torvalds return 0; 31001da177e4SLinus Torvalds } 31011da177e4SLinus Torvalds 31021da177e4SLinus Torvalds /* 31031da177e4SLinus Torvalds * SECTION: ioctl functions for eckd devices. 31041da177e4SLinus Torvalds */ 31051da177e4SLinus Torvalds 31061da177e4SLinus Torvalds /* 31071da177e4SLinus Torvalds * Release device ioctl. 31081da177e4SLinus Torvalds * Buils a channel programm to releases a prior reserved 31091da177e4SLinus Torvalds * (see dasd_eckd_reserve) device. 31101da177e4SLinus Torvalds */ 31111da177e4SLinus Torvalds static int 31121107ccfbSChristoph Hellwig dasd_eckd_release(struct dasd_device *device) 31131da177e4SLinus Torvalds { 31141da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 31151da177e4SLinus Torvalds int rc; 3116f3eb5384SStefan Weinhuber struct ccw1 *ccw; 3117f932bceaSStefan Weinhuber int useglobal; 31181da177e4SLinus Torvalds 31191da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 31201da177e4SLinus Torvalds return -EACCES; 31211da177e4SLinus Torvalds 3122f932bceaSStefan Weinhuber useglobal = 0; 312368b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 31241da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3125f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3126f932bceaSStefan Weinhuber useglobal = 1; 3127f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3128f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3129f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3130f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3131f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3132f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3133f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 31341da177e4SLinus Torvalds } 3135f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 3136f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RELEASE; 3137f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3138f3eb5384SStefan Weinhuber ccw->count = 32; 3139f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 31408e09f215SStefan Weinhuber cqr->startdev = device; 31418e09f215SStefan Weinhuber cqr->memdev = device; 31421da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 31431c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3144336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 31451da177e4SLinus Torvalds cqr->expires = 2 * HZ; 31461da177e4SLinus Torvalds cqr->buildclk = get_clock(); 31471da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 31481da177e4SLinus Torvalds 31491da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 31505a27e60dSStefan Weinhuber if (!rc) 31515a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 31521da177e4SLinus Torvalds 3153f932bceaSStefan Weinhuber if (useglobal) 3154f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3155f932bceaSStefan Weinhuber else 31568e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 31571da177e4SLinus Torvalds return rc; 31581da177e4SLinus Torvalds } 31591da177e4SLinus Torvalds 31601da177e4SLinus Torvalds /* 31611da177e4SLinus Torvalds * Reserve device ioctl. 31621da177e4SLinus Torvalds * Options are set to 'synchronous wait for interrupt' and 31631da177e4SLinus Torvalds * 'timeout the request'. This leads to a terminate IO if 31641da177e4SLinus Torvalds * the interrupt is outstanding for a certain time. 31651da177e4SLinus Torvalds */ 31661da177e4SLinus Torvalds static int 31671107ccfbSChristoph Hellwig dasd_eckd_reserve(struct dasd_device *device) 31681da177e4SLinus Torvalds { 31691da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 31701da177e4SLinus Torvalds int rc; 3171f3eb5384SStefan Weinhuber struct ccw1 *ccw; 3172f932bceaSStefan Weinhuber int useglobal; 31731da177e4SLinus Torvalds 31741da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 31751da177e4SLinus Torvalds return -EACCES; 31761da177e4SLinus Torvalds 3177f932bceaSStefan Weinhuber useglobal = 0; 317868b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 31791da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3180f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3181f932bceaSStefan Weinhuber useglobal = 1; 3182f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3183f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3184f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3185f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3186f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3187f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3188f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 31891da177e4SLinus Torvalds } 3190f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 3191f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RESERVE; 3192f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3193f3eb5384SStefan Weinhuber ccw->count = 32; 3194f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 31958e09f215SStefan Weinhuber cqr->startdev = device; 31968e09f215SStefan Weinhuber cqr->memdev = device; 31971da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 31981c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3199336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 32001da177e4SLinus Torvalds cqr->expires = 2 * HZ; 32011da177e4SLinus Torvalds cqr->buildclk = get_clock(); 32021da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 32031da177e4SLinus Torvalds 32041da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 32055a27e60dSStefan Weinhuber if (!rc) 32065a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 32071da177e4SLinus Torvalds 3208f932bceaSStefan Weinhuber if (useglobal) 3209f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3210f932bceaSStefan Weinhuber else 32118e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 32121da177e4SLinus Torvalds return rc; 32131da177e4SLinus Torvalds } 32141da177e4SLinus Torvalds 32151da177e4SLinus Torvalds /* 32161da177e4SLinus Torvalds * Steal lock ioctl - unconditional reserve device. 32171da177e4SLinus Torvalds * Buils a channel programm to break a device's reservation. 32181da177e4SLinus Torvalds * (unconditional reserve) 32191da177e4SLinus Torvalds */ 32201da177e4SLinus Torvalds static int 32211107ccfbSChristoph Hellwig dasd_eckd_steal_lock(struct dasd_device *device) 32221da177e4SLinus Torvalds { 32231da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 32241da177e4SLinus Torvalds int rc; 3225f3eb5384SStefan Weinhuber struct ccw1 *ccw; 3226f932bceaSStefan Weinhuber int useglobal; 32271da177e4SLinus Torvalds 32281da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 32291da177e4SLinus Torvalds return -EACCES; 32301da177e4SLinus Torvalds 3231f932bceaSStefan Weinhuber useglobal = 0; 323268b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 32331da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3234f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3235f932bceaSStefan Weinhuber useglobal = 1; 3236f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3237f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3238f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3239f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3240f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3241f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3242f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 32431da177e4SLinus Torvalds } 3244f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 3245f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SLCK; 3246f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3247f3eb5384SStefan Weinhuber ccw->count = 32; 3248f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 32498e09f215SStefan Weinhuber cqr->startdev = device; 32508e09f215SStefan Weinhuber cqr->memdev = device; 32511da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 32521c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3253336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 32541da177e4SLinus Torvalds cqr->expires = 2 * HZ; 32551da177e4SLinus Torvalds cqr->buildclk = get_clock(); 32561da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 32571da177e4SLinus Torvalds 32581da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 32595a27e60dSStefan Weinhuber if (!rc) 32605a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 32611da177e4SLinus Torvalds 3262f932bceaSStefan Weinhuber if (useglobal) 3263f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3264f932bceaSStefan Weinhuber else 32658e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 32661da177e4SLinus Torvalds return rc; 32671da177e4SLinus Torvalds } 32681da177e4SLinus Torvalds 32691da177e4SLinus Torvalds /* 3270196339f1SStefan Weinhuber * SNID - Sense Path Group ID 3271196339f1SStefan Weinhuber * This ioctl may be used in situations where I/O is stalled due to 3272196339f1SStefan Weinhuber * a reserve, so if the normal dasd_smalloc_request fails, we use the 3273196339f1SStefan Weinhuber * preallocated dasd_reserve_req. 3274196339f1SStefan Weinhuber */ 3275196339f1SStefan Weinhuber static int dasd_eckd_snid(struct dasd_device *device, 3276196339f1SStefan Weinhuber void __user *argp) 3277196339f1SStefan Weinhuber { 3278196339f1SStefan Weinhuber struct dasd_ccw_req *cqr; 3279196339f1SStefan Weinhuber int rc; 3280196339f1SStefan Weinhuber struct ccw1 *ccw; 3281196339f1SStefan Weinhuber int useglobal; 3282196339f1SStefan Weinhuber struct dasd_snid_ioctl_data usrparm; 3283196339f1SStefan Weinhuber 3284196339f1SStefan Weinhuber if (!capable(CAP_SYS_ADMIN)) 3285196339f1SStefan Weinhuber return -EACCES; 3286196339f1SStefan Weinhuber 3287196339f1SStefan Weinhuber if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 3288196339f1SStefan Weinhuber return -EFAULT; 3289196339f1SStefan Weinhuber 3290196339f1SStefan Weinhuber useglobal = 0; 3291196339f1SStefan Weinhuber cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 3292196339f1SStefan Weinhuber sizeof(struct dasd_snid_data), device); 3293196339f1SStefan Weinhuber if (IS_ERR(cqr)) { 3294196339f1SStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3295196339f1SStefan Weinhuber useglobal = 1; 3296196339f1SStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3297196339f1SStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3298196339f1SStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3299196339f1SStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3300196339f1SStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3301196339f1SStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3302196339f1SStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 3303196339f1SStefan Weinhuber } 3304196339f1SStefan Weinhuber ccw = cqr->cpaddr; 3305196339f1SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SNID; 3306196339f1SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3307196339f1SStefan Weinhuber ccw->count = 12; 3308196339f1SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 3309196339f1SStefan Weinhuber cqr->startdev = device; 3310196339f1SStefan Weinhuber cqr->memdev = device; 3311196339f1SStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3312196339f1SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 33135a27e60dSStefan Weinhuber set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 3314196339f1SStefan Weinhuber cqr->retries = 5; 3315196339f1SStefan Weinhuber cqr->expires = 10 * HZ; 3316196339f1SStefan Weinhuber cqr->buildclk = get_clock(); 3317196339f1SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 3318196339f1SStefan Weinhuber cqr->lpm = usrparm.path_mask; 3319196339f1SStefan Weinhuber 3320196339f1SStefan Weinhuber rc = dasd_sleep_on_immediatly(cqr); 3321196339f1SStefan Weinhuber /* verify that I/O processing didn't modify the path mask */ 3322196339f1SStefan Weinhuber if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) 3323196339f1SStefan Weinhuber rc = -EIO; 3324196339f1SStefan Weinhuber if (!rc) { 3325196339f1SStefan Weinhuber usrparm.data = *((struct dasd_snid_data *)cqr->data); 3326196339f1SStefan Weinhuber if (copy_to_user(argp, &usrparm, sizeof(usrparm))) 3327196339f1SStefan Weinhuber rc = -EFAULT; 3328196339f1SStefan Weinhuber } 3329196339f1SStefan Weinhuber 3330196339f1SStefan Weinhuber if (useglobal) 3331196339f1SStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3332196339f1SStefan Weinhuber else 3333196339f1SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 3334196339f1SStefan Weinhuber return rc; 3335196339f1SStefan Weinhuber } 3336196339f1SStefan Weinhuber 3337196339f1SStefan Weinhuber /* 33381da177e4SLinus Torvalds * Read performance statistics 33391da177e4SLinus Torvalds */ 33401da177e4SLinus Torvalds static int 33411107ccfbSChristoph Hellwig dasd_eckd_performance(struct dasd_device *device, void __user *argp) 33421da177e4SLinus Torvalds { 33431da177e4SLinus Torvalds struct dasd_psf_prssd_data *prssdp; 33441da177e4SLinus Torvalds struct dasd_rssd_perf_stats_t *stats; 33451da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 33461da177e4SLinus Torvalds struct ccw1 *ccw; 33471da177e4SLinus Torvalds int rc; 33481da177e4SLinus Torvalds 334968b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 33501da177e4SLinus Torvalds (sizeof(struct dasd_psf_prssd_data) + 33511da177e4SLinus Torvalds sizeof(struct dasd_rssd_perf_stats_t)), 33521da177e4SLinus Torvalds device); 33531da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3354fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 33551da177e4SLinus Torvalds "Could not allocate initialization request"); 33561da177e4SLinus Torvalds return PTR_ERR(cqr); 33571da177e4SLinus Torvalds } 33588e09f215SStefan Weinhuber cqr->startdev = device; 33598e09f215SStefan Weinhuber cqr->memdev = device; 33601da177e4SLinus Torvalds cqr->retries = 0; 3361eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 33621da177e4SLinus Torvalds cqr->expires = 10 * HZ; 33631da177e4SLinus Torvalds 33641da177e4SLinus Torvalds /* Prepare for Read Subsystem Data */ 33651da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 33661da177e4SLinus Torvalds memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 33671da177e4SLinus Torvalds prssdp->order = PSF_ORDER_PRSSD; 33685d67d164SJoe Perches prssdp->suborder = 0x01; /* Performance Statistics */ 33691da177e4SLinus Torvalds prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 33701da177e4SLinus Torvalds 33711da177e4SLinus Torvalds ccw = cqr->cpaddr; 33721da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_PSF; 33731da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_psf_prssd_data); 33741da177e4SLinus Torvalds ccw->flags |= CCW_FLAG_CC; 33751da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) prssdp; 33761da177e4SLinus Torvalds 33771da177e4SLinus Torvalds /* Read Subsystem Data - Performance Statistics */ 33781da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 33791da177e4SLinus Torvalds memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 33801da177e4SLinus Torvalds 33811da177e4SLinus Torvalds ccw++; 33821da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_RSSD; 33831da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 33841da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) stats; 33851da177e4SLinus Torvalds 33861da177e4SLinus Torvalds cqr->buildclk = get_clock(); 33871da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 33881da177e4SLinus Torvalds rc = dasd_sleep_on(cqr); 33891da177e4SLinus Torvalds if (rc == 0) { 33901da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 33911da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 33921107ccfbSChristoph Hellwig if (copy_to_user(argp, stats, 33931107ccfbSChristoph Hellwig sizeof(struct dasd_rssd_perf_stats_t))) 33941107ccfbSChristoph Hellwig rc = -EFAULT; 33951da177e4SLinus Torvalds } 33968e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 33971da177e4SLinus Torvalds return rc; 33981da177e4SLinus Torvalds } 33991da177e4SLinus Torvalds 34001da177e4SLinus Torvalds /* 34011da177e4SLinus Torvalds * Get attributes (cache operations) 34021da177e4SLinus Torvalds * Returnes the cache attributes used in Define Extend (DE). 34031da177e4SLinus Torvalds */ 34041da177e4SLinus Torvalds static int 34051107ccfbSChristoph Hellwig dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 34061da177e4SLinus Torvalds { 34071107ccfbSChristoph Hellwig struct dasd_eckd_private *private = 34081107ccfbSChristoph Hellwig (struct dasd_eckd_private *)device->private; 34091107ccfbSChristoph Hellwig struct attrib_data_t attrib = private->attrib; 34101da177e4SLinus Torvalds int rc; 34111da177e4SLinus Torvalds 34121da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 34131da177e4SLinus Torvalds return -EACCES; 34141107ccfbSChristoph Hellwig if (!argp) 34151da177e4SLinus Torvalds return -EINVAL; 34161da177e4SLinus Torvalds 34171107ccfbSChristoph Hellwig rc = 0; 34181107ccfbSChristoph Hellwig if (copy_to_user(argp, (long *) &attrib, 34191107ccfbSChristoph Hellwig sizeof(struct attrib_data_t))) 34201107ccfbSChristoph Hellwig rc = -EFAULT; 34211da177e4SLinus Torvalds 34221da177e4SLinus Torvalds return rc; 34231da177e4SLinus Torvalds } 34241da177e4SLinus Torvalds 34251da177e4SLinus Torvalds /* 34261da177e4SLinus Torvalds * Set attributes (cache operations) 34271da177e4SLinus Torvalds * Stores the attributes for cache operation to be used in Define Extend (DE). 34281da177e4SLinus Torvalds */ 34291da177e4SLinus Torvalds static int 34301107ccfbSChristoph Hellwig dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 34311da177e4SLinus Torvalds { 34321107ccfbSChristoph Hellwig struct dasd_eckd_private *private = 34331107ccfbSChristoph Hellwig (struct dasd_eckd_private *)device->private; 34341da177e4SLinus Torvalds struct attrib_data_t attrib; 34351da177e4SLinus Torvalds 34361da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 34371da177e4SLinus Torvalds return -EACCES; 34381107ccfbSChristoph Hellwig if (!argp) 34391da177e4SLinus Torvalds return -EINVAL; 34401da177e4SLinus Torvalds 34411107ccfbSChristoph Hellwig if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 34421da177e4SLinus Torvalds return -EFAULT; 34431da177e4SLinus Torvalds private->attrib = attrib; 34441da177e4SLinus Torvalds 3445fc19f381SStefan Haberland dev_info(&device->cdev->dev, 3446fc19f381SStefan Haberland "The DASD cache mode was set to %x (%i cylinder prestage)\n", 34471da177e4SLinus Torvalds private->attrib.operation, private->attrib.nr_cyl); 34481da177e4SLinus Torvalds return 0; 34491da177e4SLinus Torvalds } 34501da177e4SLinus Torvalds 3451ab1d848fSNigel Hislop /* 3452ab1d848fSNigel Hislop * Issue syscall I/O to EMC Symmetrix array. 3453ab1d848fSNigel Hislop * CCWs are PSF and RSSD 3454ab1d848fSNigel Hislop */ 3455ab1d848fSNigel Hislop static int dasd_symm_io(struct dasd_device *device, void __user *argp) 3456ab1d848fSNigel Hislop { 3457ab1d848fSNigel Hislop struct dasd_symmio_parms usrparm; 3458ab1d848fSNigel Hislop char *psf_data, *rssd_result; 3459ab1d848fSNigel Hislop struct dasd_ccw_req *cqr; 3460ab1d848fSNigel Hislop struct ccw1 *ccw; 346152898025SNigel Hislop char psf0, psf1; 3462ab1d848fSNigel Hislop int rc; 3463ab1d848fSNigel Hislop 346452898025SNigel Hislop if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) 346552898025SNigel Hislop return -EACCES; 346652898025SNigel Hislop psf0 = psf1 = 0; 346752898025SNigel Hislop 3468ab1d848fSNigel Hislop /* Copy parms from caller */ 3469ab1d848fSNigel Hislop rc = -EFAULT; 3470ab1d848fSNigel Hislop if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 3471ab1d848fSNigel Hislop goto out; 3472f8b06859SHeiko Carstens if (is_compat_task() || sizeof(long) == 4) { 3473ab1d848fSNigel Hislop /* Make sure pointers are sane even on 31 bit. */ 3474ab1d848fSNigel Hislop rc = -EINVAL; 3475f8b06859SHeiko Carstens if ((usrparm.psf_data >> 32) != 0) 3476ab1d848fSNigel Hislop goto out; 3477f8b06859SHeiko Carstens if ((usrparm.rssd_result >> 32) != 0) 3478f8b06859SHeiko Carstens goto out; 3479f8b06859SHeiko Carstens usrparm.psf_data &= 0x7fffffffULL; 3480f8b06859SHeiko Carstens usrparm.rssd_result &= 0x7fffffffULL; 3481ab1d848fSNigel Hislop } 3482ab1d848fSNigel Hislop /* alloc I/O data area */ 3483ab1d848fSNigel Hislop psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 3484ab1d848fSNigel Hislop rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 3485ab1d848fSNigel Hislop if (!psf_data || !rssd_result) { 3486ab1d848fSNigel Hislop rc = -ENOMEM; 3487ab1d848fSNigel Hislop goto out_free; 3488ab1d848fSNigel Hislop } 3489ab1d848fSNigel Hislop 3490ab1d848fSNigel Hislop /* get syscall header from user space */ 3491ab1d848fSNigel Hislop rc = -EFAULT; 3492ab1d848fSNigel Hislop if (copy_from_user(psf_data, 3493ab1d848fSNigel Hislop (void __user *)(unsigned long) usrparm.psf_data, 3494ab1d848fSNigel Hislop usrparm.psf_data_len)) 3495ab1d848fSNigel Hislop goto out_free; 349652898025SNigel Hislop psf0 = psf_data[0]; 349752898025SNigel Hislop psf1 = psf_data[1]; 3498ab1d848fSNigel Hislop 3499ab1d848fSNigel Hislop /* setup CCWs for PSF + RSSD */ 350068b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device); 3501ab1d848fSNigel Hislop if (IS_ERR(cqr)) { 3502fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3503ab1d848fSNigel Hislop "Could not allocate initialization request"); 3504ab1d848fSNigel Hislop rc = PTR_ERR(cqr); 3505ab1d848fSNigel Hislop goto out_free; 3506ab1d848fSNigel Hislop } 3507ab1d848fSNigel Hislop 3508ab1d848fSNigel Hislop cqr->startdev = device; 3509ab1d848fSNigel Hislop cqr->memdev = device; 3510ab1d848fSNigel Hislop cqr->retries = 3; 3511ab1d848fSNigel Hislop cqr->expires = 10 * HZ; 3512ab1d848fSNigel Hislop cqr->buildclk = get_clock(); 3513ab1d848fSNigel Hislop cqr->status = DASD_CQR_FILLED; 3514ab1d848fSNigel Hislop 3515ab1d848fSNigel Hislop /* Build the ccws */ 3516ab1d848fSNigel Hislop ccw = cqr->cpaddr; 3517ab1d848fSNigel Hislop 3518ab1d848fSNigel Hislop /* PSF ccw */ 3519ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_PSF; 3520ab1d848fSNigel Hislop ccw->count = usrparm.psf_data_len; 3521ab1d848fSNigel Hislop ccw->flags |= CCW_FLAG_CC; 3522ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) psf_data; 3523ab1d848fSNigel Hislop 3524ab1d848fSNigel Hislop ccw++; 3525ab1d848fSNigel Hislop 3526ab1d848fSNigel Hislop /* RSSD ccw */ 3527ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_RSSD; 3528ab1d848fSNigel Hislop ccw->count = usrparm.rssd_result_len; 3529ab1d848fSNigel Hislop ccw->flags = CCW_FLAG_SLI ; 3530ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) rssd_result; 3531ab1d848fSNigel Hislop 3532ab1d848fSNigel Hislop rc = dasd_sleep_on(cqr); 3533ab1d848fSNigel Hislop if (rc) 3534ab1d848fSNigel Hislop goto out_sfree; 3535ab1d848fSNigel Hislop 3536ab1d848fSNigel Hislop rc = -EFAULT; 3537ab1d848fSNigel Hislop if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 3538ab1d848fSNigel Hislop rssd_result, usrparm.rssd_result_len)) 3539ab1d848fSNigel Hislop goto out_sfree; 3540ab1d848fSNigel Hislop rc = 0; 3541ab1d848fSNigel Hislop 3542ab1d848fSNigel Hislop out_sfree: 3543ab1d848fSNigel Hislop dasd_sfree_request(cqr, cqr->memdev); 3544ab1d848fSNigel Hislop out_free: 3545ab1d848fSNigel Hislop kfree(rssd_result); 3546ab1d848fSNigel Hislop kfree(psf_data); 3547ab1d848fSNigel Hislop out: 354852898025SNigel Hislop DBF_DEV_EVENT(DBF_WARNING, device, 354952898025SNigel Hislop "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", 355052898025SNigel Hislop (int) psf0, (int) psf1, rc); 3551ab1d848fSNigel Hislop return rc; 3552ab1d848fSNigel Hislop } 3553ab1d848fSNigel Hislop 35541107ccfbSChristoph Hellwig static int 35558e09f215SStefan Weinhuber dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 35561107ccfbSChristoph Hellwig { 35578e09f215SStefan Weinhuber struct dasd_device *device = block->base; 35588e09f215SStefan Weinhuber 35591107ccfbSChristoph Hellwig switch (cmd) { 35601107ccfbSChristoph Hellwig case BIODASDGATTR: 35611107ccfbSChristoph Hellwig return dasd_eckd_get_attrib(device, argp); 35621107ccfbSChristoph Hellwig case BIODASDSATTR: 35631107ccfbSChristoph Hellwig return dasd_eckd_set_attrib(device, argp); 35641107ccfbSChristoph Hellwig case BIODASDPSRD: 35651107ccfbSChristoph Hellwig return dasd_eckd_performance(device, argp); 35661107ccfbSChristoph Hellwig case BIODASDRLSE: 35671107ccfbSChristoph Hellwig return dasd_eckd_release(device); 35681107ccfbSChristoph Hellwig case BIODASDRSRV: 35691107ccfbSChristoph Hellwig return dasd_eckd_reserve(device); 35701107ccfbSChristoph Hellwig case BIODASDSLCK: 35711107ccfbSChristoph Hellwig return dasd_eckd_steal_lock(device); 3572196339f1SStefan Weinhuber case BIODASDSNID: 3573196339f1SStefan Weinhuber return dasd_eckd_snid(device, argp); 3574ab1d848fSNigel Hislop case BIODASDSYMMIO: 3575ab1d848fSNigel Hislop return dasd_symm_io(device, argp); 35761107ccfbSChristoph Hellwig default: 35771107ccfbSChristoph Hellwig return -ENOIOCTLCMD; 35781107ccfbSChristoph Hellwig } 35791107ccfbSChristoph Hellwig } 35801107ccfbSChristoph Hellwig 35811da177e4SLinus Torvalds /* 3582445b5b49SHorst Hummel * Dump the range of CCWs into 'page' buffer 3583445b5b49SHorst Hummel * and return number of printed chars. 3584445b5b49SHorst Hummel */ 35854d284cacSHeiko Carstens static int 3586445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 3587445b5b49SHorst Hummel { 3588445b5b49SHorst Hummel int len, count; 3589445b5b49SHorst Hummel char *datap; 3590445b5b49SHorst Hummel 3591445b5b49SHorst Hummel len = 0; 3592445b5b49SHorst Hummel while (from <= to) { 3593445b5b49SHorst Hummel len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3594445b5b49SHorst Hummel " CCW %p: %08X %08X DAT:", 3595445b5b49SHorst Hummel from, ((int *) from)[0], ((int *) from)[1]); 3596445b5b49SHorst Hummel 3597445b5b49SHorst Hummel /* get pointer to data (consider IDALs) */ 3598445b5b49SHorst Hummel if (from->flags & CCW_FLAG_IDA) 3599445b5b49SHorst Hummel datap = (char *) *((addr_t *) (addr_t) from->cda); 3600445b5b49SHorst Hummel else 3601445b5b49SHorst Hummel datap = (char *) ((addr_t) from->cda); 3602445b5b49SHorst Hummel 3603445b5b49SHorst Hummel /* dump data (max 32 bytes) */ 3604445b5b49SHorst Hummel for (count = 0; count < from->count && count < 32; count++) { 3605445b5b49SHorst Hummel if (count % 8 == 0) len += sprintf(page + len, " "); 3606445b5b49SHorst Hummel if (count % 4 == 0) len += sprintf(page + len, " "); 3607445b5b49SHorst Hummel len += sprintf(page + len, "%02x", datap[count]); 3608445b5b49SHorst Hummel } 3609445b5b49SHorst Hummel len += sprintf(page + len, "\n"); 3610445b5b49SHorst Hummel from++; 3611445b5b49SHorst Hummel } 3612445b5b49SHorst Hummel return len; 3613445b5b49SHorst Hummel } 3614445b5b49SHorst Hummel 3615fc19f381SStefan Haberland static void 3616aeec92caSStefan Haberland dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 3617aeec92caSStefan Haberland char *reason) 3618fc19f381SStefan Haberland { 3619fc19f381SStefan Haberland u64 *sense; 3620a5a0061fSStefan Weinhuber u64 *stat; 3621fc19f381SStefan Haberland 3622aeec92caSStefan Haberland sense = (u64 *) dasd_get_sense(irb); 3623a5a0061fSStefan Weinhuber stat = (u64 *) &irb->scsw; 3624fc19f381SStefan Haberland if (sense) { 3625a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " 3626a5a0061fSStefan Weinhuber "%016llx %016llx %016llx %016llx", 3627a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 3628ed3640b2SStefan Haberland sense[0], sense[1], sense[2], sense[3]); 3629fc19f381SStefan Haberland } else { 3630a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", 3631a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 3632a5a0061fSStefan Weinhuber "NO VALID SENSE"); 3633fc19f381SStefan Haberland } 3634fc19f381SStefan Haberland } 3635fc19f381SStefan Haberland 3636445b5b49SHorst Hummel /* 36371da177e4SLinus Torvalds * Print sense data and related channel program. 36381da177e4SLinus Torvalds * Parts are printed because printk buffer is only 1024 bytes. 36391da177e4SLinus Torvalds */ 3640f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 36418e09f215SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 36421da177e4SLinus Torvalds { 36431da177e4SLinus Torvalds char *page; 3644445b5b49SHorst Hummel struct ccw1 *first, *last, *fail, *from, *to; 3645445b5b49SHorst Hummel int len, sl, sct; 36461da177e4SLinus Torvalds 36471da177e4SLinus Torvalds page = (char *) get_zeroed_page(GFP_ATOMIC); 36481da177e4SLinus Torvalds if (page == NULL) { 3649fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3650fc19f381SStefan Haberland "No memory to dump sense data\n"); 36511da177e4SLinus Torvalds return; 36521da177e4SLinus Torvalds } 3653445b5b49SHorst Hummel /* dump the sense data */ 36541da177e4SLinus Torvalds len = sprintf(page, KERN_ERR PRINTK_HEADER 36551da177e4SLinus Torvalds " I/O status report for device %s:\n", 36562a0217d5SKay Sievers dev_name(&device->cdev->dev)); 36571da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3658a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 3659a5a0061fSStefan Weinhuber "CS:%02X RC:%d\n", 3660a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 3661a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 3662a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 3663a5a0061fSStefan Weinhuber req ? req->intrc : 0); 36641da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 36651da177e4SLinus Torvalds " device %s: Failing CCW: %p\n", 36662a0217d5SKay Sievers dev_name(&device->cdev->dev), 366723d805b6SPeter Oberparleiter (void *) (addr_t) irb->scsw.cmd.cpa); 36681da177e4SLinus Torvalds if (irb->esw.esw0.erw.cons) { 36691da177e4SLinus Torvalds for (sl = 0; sl < 4; sl++) { 36701da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 36711da177e4SLinus Torvalds " Sense(hex) %2d-%2d:", 36721da177e4SLinus Torvalds (8 * sl), ((8 * sl) + 7)); 36731da177e4SLinus Torvalds 36741da177e4SLinus Torvalds for (sct = 0; sct < 8; sct++) { 36751da177e4SLinus Torvalds len += sprintf(page + len, " %02x", 36761da177e4SLinus Torvalds irb->ecw[8 * sl + sct]); 36771da177e4SLinus Torvalds } 36781da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 36791da177e4SLinus Torvalds } 36801da177e4SLinus Torvalds 36811da177e4SLinus Torvalds if (irb->ecw[27] & DASD_SENSE_BIT_0) { 36821da177e4SLinus Torvalds /* 24 Byte Sense Data */ 3683445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 36841da177e4SLinus Torvalds " 24 Byte: %x MSG %x, " 36851da177e4SLinus Torvalds "%s MSGb to SYSOP\n", 36861da177e4SLinus Torvalds irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 36871da177e4SLinus Torvalds irb->ecw[1] & 0x10 ? "" : "no"); 36881da177e4SLinus Torvalds } else { 36891da177e4SLinus Torvalds /* 32 Byte Sense Data */ 3690445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 36911da177e4SLinus Torvalds " 32 Byte: Format: %x " 36921da177e4SLinus Torvalds "Exception class %x\n", 36931da177e4SLinus Torvalds irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 36941da177e4SLinus Torvalds } 36951da177e4SLinus Torvalds } else { 3696445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 36971da177e4SLinus Torvalds " SORRY - NO VALID SENSE AVAILABLE\n"); 36981da177e4SLinus Torvalds } 3699445b5b49SHorst Hummel printk("%s", page); 37001da177e4SLinus Torvalds 37018e09f215SStefan Weinhuber if (req) { 37028e09f215SStefan Weinhuber /* req == NULL for unsolicited interrupts */ 3703445b5b49SHorst Hummel /* dump the Channel Program (max 140 Bytes per line) */ 3704445b5b49SHorst Hummel /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 3705445b5b49SHorst Hummel first = req->cpaddr; 3706445b5b49SHorst Hummel for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 3707445b5b49SHorst Hummel to = min(first + 6, last); 37081da177e4SLinus Torvalds len = sprintf(page, KERN_ERR PRINTK_HEADER 37091da177e4SLinus Torvalds " Related CP in req: %p\n", req); 3710445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(first, to, page + len); 3711445b5b49SHorst Hummel printk("%s", page); 37121da177e4SLinus Torvalds 3713445b5b49SHorst Hummel /* print failing CCW area (maximum 4) */ 3714445b5b49SHorst Hummel /* scsw->cda is either valid or zero */ 37151da177e4SLinus Torvalds len = 0; 3716445b5b49SHorst Hummel from = ++to; 371723d805b6SPeter Oberparleiter fail = (struct ccw1 *)(addr_t) 371823d805b6SPeter Oberparleiter irb->scsw.cmd.cpa; /* failing CCW */ 3719445b5b49SHorst Hummel if (from < fail - 2) { 3720445b5b49SHorst Hummel from = fail - 2; /* there is a gap - print header */ 3721445b5b49SHorst Hummel len += sprintf(page, KERN_ERR PRINTK_HEADER "......\n"); 37221da177e4SLinus Torvalds } 3723445b5b49SHorst Hummel to = min(fail + 1, last); 3724445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, to, page + len); 37251da177e4SLinus Torvalds 3726445b5b49SHorst Hummel /* print last CCWs (maximum 2) */ 3727445b5b49SHorst Hummel from = max(from, ++to); 3728445b5b49SHorst Hummel if (from < last - 1) { 3729445b5b49SHorst Hummel from = last - 1; /* there is a gap - print header */ 37301da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n"); 37311da177e4SLinus Torvalds } 3732445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, last, page + len); 37331da177e4SLinus Torvalds if (len > 0) 3734445b5b49SHorst Hummel printk("%s", page); 37358e09f215SStefan Weinhuber } 37361da177e4SLinus Torvalds free_page((unsigned long) page); 37371da177e4SLinus Torvalds } 37381da177e4SLinus Torvalds 3739f3eb5384SStefan Weinhuber 3740f3eb5384SStefan Weinhuber /* 3741f3eb5384SStefan Weinhuber * Print sense data from a tcw. 3742f3eb5384SStefan Weinhuber */ 3743f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 3744f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 3745f3eb5384SStefan Weinhuber { 3746f3eb5384SStefan Weinhuber char *page; 3747f3eb5384SStefan Weinhuber int len, sl, sct, residual; 3748f3eb5384SStefan Weinhuber struct tsb *tsb; 3749ef19298bSStefan Weinhuber u8 *sense, *rcq; 3750f3eb5384SStefan Weinhuber 3751f3eb5384SStefan Weinhuber page = (char *) get_zeroed_page(GFP_ATOMIC); 3752f3eb5384SStefan Weinhuber if (page == NULL) { 3753fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, " %s", 3754f3eb5384SStefan Weinhuber "No memory to dump sense data"); 3755f3eb5384SStefan Weinhuber return; 3756f3eb5384SStefan Weinhuber } 3757f3eb5384SStefan Weinhuber /* dump the sense data */ 3758f3eb5384SStefan Weinhuber len = sprintf(page, KERN_ERR PRINTK_HEADER 3759f3eb5384SStefan Weinhuber " I/O status report for device %s:\n", 3760f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev)); 3761f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3762a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 3763a5a0061fSStefan Weinhuber "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", 3764a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 3765a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 3766a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 3767a5a0061fSStefan Weinhuber irb->scsw.tm.fcxs, irb->scsw.tm.schxs, 3768a5a0061fSStefan Weinhuber req ? req->intrc : 0); 3769f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3770f3eb5384SStefan Weinhuber " device %s: Failing TCW: %p\n", 3771f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev), 3772f3eb5384SStefan Weinhuber (void *) (addr_t) irb->scsw.tm.tcw); 3773f3eb5384SStefan Weinhuber 3774f3eb5384SStefan Weinhuber tsb = NULL; 3775f3eb5384SStefan Weinhuber sense = NULL; 3776a5a0061fSStefan Weinhuber if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) 3777f3eb5384SStefan Weinhuber tsb = tcw_get_tsb( 3778f3eb5384SStefan Weinhuber (struct tcw *)(unsigned long)irb->scsw.tm.tcw); 3779f3eb5384SStefan Weinhuber 3780b8fde722SStefan Haberland if (tsb) { 3781f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3782f3eb5384SStefan Weinhuber " tsb->length %d\n", tsb->length); 3783f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3784f3eb5384SStefan Weinhuber " tsb->flags %x\n", tsb->flags); 3785f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3786f3eb5384SStefan Weinhuber " tsb->dcw_offset %d\n", tsb->dcw_offset); 3787f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3788f3eb5384SStefan Weinhuber " tsb->count %d\n", tsb->count); 3789f3eb5384SStefan Weinhuber residual = tsb->count - 28; 3790f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3791f3eb5384SStefan Weinhuber " residual %d\n", residual); 3792f3eb5384SStefan Weinhuber 3793f3eb5384SStefan Weinhuber switch (tsb->flags & 0x07) { 3794f3eb5384SStefan Weinhuber case 1: /* tsa_iostat */ 3795f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3796f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_time %d\n", 3797f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_time); 3798f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3799f3eb5384SStefan Weinhuber " tsb->tsa.iostat.def_time %d\n", 3800f3eb5384SStefan Weinhuber tsb->tsa.iostat.def_time); 3801f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3802f3eb5384SStefan Weinhuber " tsb->tsa.iostat.queue_time %d\n", 3803f3eb5384SStefan Weinhuber tsb->tsa.iostat.queue_time); 3804f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3805f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_busy_time %d\n", 3806f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_busy_time); 3807f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3808f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_act_time %d\n", 3809f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_act_time); 3810f3eb5384SStefan Weinhuber sense = tsb->tsa.iostat.sense; 3811f3eb5384SStefan Weinhuber break; 3812f3eb5384SStefan Weinhuber case 2: /* ts_ddpc */ 3813f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3814f3eb5384SStefan Weinhuber " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); 3815ef19298bSStefan Weinhuber for (sl = 0; sl < 2; sl++) { 3816ef19298bSStefan Weinhuber len += sprintf(page + len, 3817ef19298bSStefan Weinhuber KERN_ERR PRINTK_HEADER 3818ef19298bSStefan Weinhuber " tsb->tsa.ddpc.rcq %2d-%2d: ", 3819ef19298bSStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 3820ef19298bSStefan Weinhuber rcq = tsb->tsa.ddpc.rcq; 3821f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 3822f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 3823ef19298bSStefan Weinhuber rcq[8 * sl + sct]); 3824f3eb5384SStefan Weinhuber } 3825f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 3826f3eb5384SStefan Weinhuber } 3827f3eb5384SStefan Weinhuber sense = tsb->tsa.ddpc.sense; 3828f3eb5384SStefan Weinhuber break; 3829f3eb5384SStefan Weinhuber case 3: /* tsa_intrg */ 3830f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3831f3eb5384SStefan Weinhuber " tsb->tsa.intrg.: not supportet yet \n"); 3832f3eb5384SStefan Weinhuber break; 3833f3eb5384SStefan Weinhuber } 3834f3eb5384SStefan Weinhuber 3835f3eb5384SStefan Weinhuber if (sense) { 3836f3eb5384SStefan Weinhuber for (sl = 0; sl < 4; sl++) { 3837f3eb5384SStefan Weinhuber len += sprintf(page + len, 3838f3eb5384SStefan Weinhuber KERN_ERR PRINTK_HEADER 3839f3eb5384SStefan Weinhuber " Sense(hex) %2d-%2d:", 3840f3eb5384SStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 3841f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 3842f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 3843f3eb5384SStefan Weinhuber sense[8 * sl + sct]); 3844f3eb5384SStefan Weinhuber } 3845f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 3846f3eb5384SStefan Weinhuber } 3847f3eb5384SStefan Weinhuber 3848f3eb5384SStefan Weinhuber if (sense[27] & DASD_SENSE_BIT_0) { 3849f3eb5384SStefan Weinhuber /* 24 Byte Sense Data */ 3850f3eb5384SStefan Weinhuber sprintf(page + len, KERN_ERR PRINTK_HEADER 3851f3eb5384SStefan Weinhuber " 24 Byte: %x MSG %x, " 3852f3eb5384SStefan Weinhuber "%s MSGb to SYSOP\n", 3853f3eb5384SStefan Weinhuber sense[7] >> 4, sense[7] & 0x0f, 3854f3eb5384SStefan Weinhuber sense[1] & 0x10 ? "" : "no"); 3855f3eb5384SStefan Weinhuber } else { 3856f3eb5384SStefan Weinhuber /* 32 Byte Sense Data */ 3857f3eb5384SStefan Weinhuber sprintf(page + len, KERN_ERR PRINTK_HEADER 3858f3eb5384SStefan Weinhuber " 32 Byte: Format: %x " 3859f3eb5384SStefan Weinhuber "Exception class %x\n", 3860f3eb5384SStefan Weinhuber sense[6] & 0x0f, sense[22] >> 4); 3861f3eb5384SStefan Weinhuber } 3862f3eb5384SStefan Weinhuber } else { 3863f3eb5384SStefan Weinhuber sprintf(page + len, KERN_ERR PRINTK_HEADER 3864f3eb5384SStefan Weinhuber " SORRY - NO VALID SENSE AVAILABLE\n"); 3865f3eb5384SStefan Weinhuber } 3866f3eb5384SStefan Weinhuber } else { 3867f3eb5384SStefan Weinhuber sprintf(page + len, KERN_ERR PRINTK_HEADER 3868f3eb5384SStefan Weinhuber " SORRY - NO TSB DATA AVAILABLE\n"); 3869f3eb5384SStefan Weinhuber } 3870f3eb5384SStefan Weinhuber printk("%s", page); 3871f3eb5384SStefan Weinhuber free_page((unsigned long) page); 3872f3eb5384SStefan Weinhuber } 3873f3eb5384SStefan Weinhuber 3874f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense(struct dasd_device *device, 3875f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 3876f3eb5384SStefan Weinhuber { 3877a5a0061fSStefan Weinhuber if (scsw_is_tm(&irb->scsw)) 3878f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_tcw(device, req, irb); 3879f3eb5384SStefan Weinhuber else 3880f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_ccw(device, req, irb); 3881f3eb5384SStefan Weinhuber } 3882f3eb5384SStefan Weinhuber 3883501183f2SStefan Haberland static int dasd_eckd_pm_freeze(struct dasd_device *device) 3884d41dd122SStefan Haberland { 3885d41dd122SStefan Haberland /* 3886d41dd122SStefan Haberland * the device should be disconnected from our LCU structure 3887d41dd122SStefan Haberland * on restore we will reconnect it and reread LCU specific 3888d41dd122SStefan Haberland * information like PAV support that might have changed 3889d41dd122SStefan Haberland */ 3890d41dd122SStefan Haberland dasd_alias_remove_device(device); 3891d41dd122SStefan Haberland dasd_alias_disconnect_device_from_lcu(device); 3892d41dd122SStefan Haberland 3893d41dd122SStefan Haberland return 0; 3894d41dd122SStefan Haberland } 3895d41dd122SStefan Haberland 3896501183f2SStefan Haberland static int dasd_eckd_restore_device(struct dasd_device *device) 3897d41dd122SStefan Haberland { 3898d41dd122SStefan Haberland struct dasd_eckd_private *private; 38996fca97a9SStefan Haberland struct dasd_eckd_characteristics temp_rdc_data; 3900d41dd122SStefan Haberland int is_known, rc; 3901d41dd122SStefan Haberland struct dasd_uid temp_uid; 3902a7602f6cSStefan Haberland unsigned long flags; 3903d41dd122SStefan Haberland 3904d41dd122SStefan Haberland private = (struct dasd_eckd_private *) device->private; 3905d41dd122SStefan Haberland 3906d41dd122SStefan Haberland /* Read Configuration Data */ 3907d41dd122SStefan Haberland rc = dasd_eckd_read_conf(device); 3908d41dd122SStefan Haberland if (rc) 3909d41dd122SStefan Haberland goto out_err; 3910d41dd122SStefan Haberland 39112dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 39122dedf0d9SStefan Haberland /* Generate device unique id */ 39132dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 39142dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 3915d41dd122SStefan Haberland if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) 3916a7602f6cSStefan Haberland dev_err(&device->cdev->dev, "The UID of the DASD has " 3917a7602f6cSStefan Haberland "changed\n"); 39182dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 3919d41dd122SStefan Haberland if (rc) 3920d41dd122SStefan Haberland goto out_err; 3921d41dd122SStefan Haberland 3922d41dd122SStefan Haberland /* register lcu with alias handling, enable PAV if this is a new lcu */ 3923d41dd122SStefan Haberland is_known = dasd_alias_make_device_known_to_lcu(device); 3924d41dd122SStefan Haberland if (is_known < 0) 3925d41dd122SStefan Haberland return is_known; 3926d41dd122SStefan Haberland if (!is_known) { 3927f4ac1d02SStefan Weinhuber dasd_eckd_validate_server(device); 3928f4ac1d02SStefan Weinhuber dasd_alias_lcu_setup_complete(device); 3929f4ac1d02SStefan Weinhuber } else 3930f4ac1d02SStefan Weinhuber dasd_alias_wait_for_lcu_setup(device); 3931f4ac1d02SStefan Weinhuber 3932f4ac1d02SStefan Weinhuber /* RE-Read Configuration Data */ 3933f4ac1d02SStefan Weinhuber rc = dasd_eckd_read_conf(device); 3934d41dd122SStefan Haberland if (rc) 3935d41dd122SStefan Haberland goto out_err; 3936d41dd122SStefan Haberland 3937d41dd122SStefan Haberland /* Read Feature Codes */ 393868d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 3939d41dd122SStefan Haberland 3940d41dd122SStefan Haberland /* Read Device Characteristics */ 394168b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 39426fca97a9SStefan Haberland &temp_rdc_data, 64); 3943d41dd122SStefan Haberland if (rc) { 3944b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 3945b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 3946d41dd122SStefan Haberland goto out_err; 3947d41dd122SStefan Haberland } 3948a7602f6cSStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 39496fca97a9SStefan Haberland memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data)); 3950a7602f6cSStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 3951d41dd122SStefan Haberland 3952d41dd122SStefan Haberland /* add device to alias management */ 3953d41dd122SStefan Haberland dasd_alias_add_device(device); 3954d41dd122SStefan Haberland 3955d41dd122SStefan Haberland return 0; 3956d41dd122SStefan Haberland 3957d41dd122SStefan Haberland out_err: 3958e6125fbaSStefan Haberland return -1; 3959d41dd122SStefan Haberland } 3960d41dd122SStefan Haberland 3961501183f2SStefan Haberland static int dasd_eckd_reload_device(struct dasd_device *device) 3962501183f2SStefan Haberland { 3963501183f2SStefan Haberland struct dasd_eckd_private *private; 3964501183f2SStefan Haberland int rc, old_base; 39652dedf0d9SStefan Haberland char print_uid[60]; 39662dedf0d9SStefan Haberland struct dasd_uid uid; 39672dedf0d9SStefan Haberland unsigned long flags; 3968501183f2SStefan Haberland 3969501183f2SStefan Haberland private = (struct dasd_eckd_private *) device->private; 39702dedf0d9SStefan Haberland 39712dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 3972501183f2SStefan Haberland old_base = private->uid.base_unit_addr; 39732dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 39742dedf0d9SStefan Haberland 3975501183f2SStefan Haberland /* Read Configuration Data */ 3976501183f2SStefan Haberland rc = dasd_eckd_read_conf(device); 3977501183f2SStefan Haberland if (rc) 3978501183f2SStefan Haberland goto out_err; 3979501183f2SStefan Haberland 39802dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 3981501183f2SStefan Haberland if (rc) 3982501183f2SStefan Haberland goto out_err; 3983501183f2SStefan Haberland /* 3984501183f2SStefan Haberland * update unit address configuration and 3985501183f2SStefan Haberland * add device to alias management 3986501183f2SStefan Haberland */ 3987501183f2SStefan Haberland dasd_alias_update_add_device(device); 3988501183f2SStefan Haberland 39892dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &uid); 39902dedf0d9SStefan Haberland 39912dedf0d9SStefan Haberland if (old_base != uid.base_unit_addr) { 39922dedf0d9SStefan Haberland if (strlen(uid.vduit) > 0) 39932dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 39942dedf0d9SStefan Haberland "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial, 39952dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr, uid.vduit); 3996501183f2SStefan Haberland else 39972dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 39982dedf0d9SStefan Haberland "%s.%s.%04x.%02x", uid.vendor, uid.serial, 39992dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr); 4000501183f2SStefan Haberland 4001501183f2SStefan Haberland dev_info(&device->cdev->dev, 4002501183f2SStefan Haberland "An Alias device was reassigned to a new base device " 40032dedf0d9SStefan Haberland "with UID: %s\n", print_uid); 4004501183f2SStefan Haberland } 4005501183f2SStefan Haberland return 0; 4006501183f2SStefan Haberland 4007501183f2SStefan Haberland out_err: 4008501183f2SStefan Haberland return -1; 4009501183f2SStefan Haberland } 4010501183f2SStefan Haberland 4011d41dd122SStefan Haberland static struct ccw_driver dasd_eckd_driver = { 40123bda058bSSebastian Ott .driver = { 4013d41dd122SStefan Haberland .name = "dasd-eckd", 4014d41dd122SStefan Haberland .owner = THIS_MODULE, 40153bda058bSSebastian Ott }, 4016d41dd122SStefan Haberland .ids = dasd_eckd_ids, 4017d41dd122SStefan Haberland .probe = dasd_eckd_probe, 4018d41dd122SStefan Haberland .remove = dasd_generic_remove, 4019d41dd122SStefan Haberland .set_offline = dasd_generic_set_offline, 4020d41dd122SStefan Haberland .set_online = dasd_eckd_set_online, 4021d41dd122SStefan Haberland .notify = dasd_generic_notify, 4022a4d26c6aSStefan Weinhuber .path_event = dasd_generic_path_event, 4023d41dd122SStefan Haberland .freeze = dasd_generic_pm_freeze, 4024d41dd122SStefan Haberland .thaw = dasd_generic_restore_device, 4025d41dd122SStefan Haberland .restore = dasd_generic_restore_device, 4026a23ed009SStefan Haberland .uc_handler = dasd_generic_uc_handler, 4027de400d6bSPeter Oberparleiter .int_class = IOINT_DAS, 4028d41dd122SStefan Haberland }; 4029f3eb5384SStefan Weinhuber 40301da177e4SLinus Torvalds /* 40311da177e4SLinus Torvalds * max_blocks is dependent on the amount of storage that is available 40321da177e4SLinus Torvalds * in the static io buffer for each device. Currently each device has 40331da177e4SLinus Torvalds * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has 40341da177e4SLinus Torvalds * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use 40351da177e4SLinus Torvalds * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In 40361da177e4SLinus Torvalds * addition we have one define extent ccw + 16 bytes of data and one 40371da177e4SLinus Torvalds * locate record ccw + 16 bytes of data. That makes: 40381da177e4SLinus Torvalds * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. 40391da177e4SLinus Torvalds * We want to fit two into the available memory so that we can immediately 40401da177e4SLinus Torvalds * start the next request if one finishes off. That makes 249.5 blocks 40411da177e4SLinus Torvalds * for one request. Give a little safety and the result is 240. 40421da177e4SLinus Torvalds */ 40431da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline = { 40441da177e4SLinus Torvalds .owner = THIS_MODULE, 40451da177e4SLinus Torvalds .name = "ECKD", 40461da177e4SLinus Torvalds .ebcname = "ECKD", 4047ef19298bSStefan Weinhuber .max_blocks = 190, 40481da177e4SLinus Torvalds .check_device = dasd_eckd_check_characteristics, 40498e09f215SStefan Weinhuber .uncheck_device = dasd_eckd_uncheck_device, 40501da177e4SLinus Torvalds .do_analysis = dasd_eckd_do_analysis, 4051a4d26c6aSStefan Weinhuber .verify_path = dasd_eckd_verify_path, 40528e09f215SStefan Weinhuber .ready_to_online = dasd_eckd_ready_to_online, 40538e09f215SStefan Weinhuber .online_to_ready = dasd_eckd_online_to_ready, 40541da177e4SLinus Torvalds .fill_geometry = dasd_eckd_fill_geometry, 40551da177e4SLinus Torvalds .start_IO = dasd_start_IO, 40561da177e4SLinus Torvalds .term_IO = dasd_term_IO, 40578e09f215SStefan Weinhuber .handle_terminated_request = dasd_eckd_handle_terminated_request, 40581da177e4SLinus Torvalds .format_device = dasd_eckd_format_device, 40591da177e4SLinus Torvalds .erp_action = dasd_eckd_erp_action, 40601da177e4SLinus Torvalds .erp_postaction = dasd_eckd_erp_postaction, 40615a27e60dSStefan Weinhuber .check_for_device_change = dasd_eckd_check_for_device_change, 40628e09f215SStefan Weinhuber .build_cp = dasd_eckd_build_alias_cp, 40638e09f215SStefan Weinhuber .free_cp = dasd_eckd_free_alias_cp, 40641da177e4SLinus Torvalds .dump_sense = dasd_eckd_dump_sense, 4065fc19f381SStefan Haberland .dump_sense_dbf = dasd_eckd_dump_sense_dbf, 40661da177e4SLinus Torvalds .fill_info = dasd_eckd_fill_info, 40671107ccfbSChristoph Hellwig .ioctl = dasd_eckd_ioctl, 4068d41dd122SStefan Haberland .freeze = dasd_eckd_pm_freeze, 4069d41dd122SStefan Haberland .restore = dasd_eckd_restore_device, 4070501183f2SStefan Haberland .reload = dasd_eckd_reload_device, 40712dedf0d9SStefan Haberland .get_uid = dasd_eckd_get_uid, 40721da177e4SLinus Torvalds }; 40731da177e4SLinus Torvalds 40741da177e4SLinus Torvalds static int __init 40751da177e4SLinus Torvalds dasd_eckd_init(void) 40761da177e4SLinus Torvalds { 4077736e6ea0SSebastian Ott int ret; 4078736e6ea0SSebastian Ott 40791da177e4SLinus Torvalds ASCEBC(dasd_eckd_discipline.ebcname, 4); 4080f932bceaSStefan Weinhuber dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), 4081f932bceaSStefan Weinhuber GFP_KERNEL | GFP_DMA); 4082f932bceaSStefan Weinhuber if (!dasd_reserve_req) 4083f932bceaSStefan Weinhuber return -ENOMEM; 4084a4d26c6aSStefan Weinhuber path_verification_worker = kmalloc(sizeof(*path_verification_worker), 4085a4d26c6aSStefan Weinhuber GFP_KERNEL | GFP_DMA); 4086a4d26c6aSStefan Weinhuber if (!path_verification_worker) { 4087a4d26c6aSStefan Weinhuber kfree(dasd_reserve_req); 4088a4d26c6aSStefan Weinhuber return -ENOMEM; 4089a4d26c6aSStefan Weinhuber } 4090736e6ea0SSebastian Ott ret = ccw_driver_register(&dasd_eckd_driver); 4091736e6ea0SSebastian Ott if (!ret) 4092736e6ea0SSebastian Ott wait_for_device_probe(); 4093a4d26c6aSStefan Weinhuber else { 4094a4d26c6aSStefan Weinhuber kfree(path_verification_worker); 4095f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 4096a4d26c6aSStefan Weinhuber } 4097736e6ea0SSebastian Ott return ret; 40981da177e4SLinus Torvalds } 40991da177e4SLinus Torvalds 41001da177e4SLinus Torvalds static void __exit 41011da177e4SLinus Torvalds dasd_eckd_cleanup(void) 41021da177e4SLinus Torvalds { 41031da177e4SLinus Torvalds ccw_driver_unregister(&dasd_eckd_driver); 4104a4d26c6aSStefan Weinhuber kfree(path_verification_worker); 4105f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 41061da177e4SLinus Torvalds } 41071da177e4SLinus Torvalds 41081da177e4SLinus Torvalds module_init(dasd_eckd_init); 41091da177e4SLinus Torvalds module_exit(dasd_eckd_cleanup); 4110