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 571da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 581da177e4SLinus Torvalds 591da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline; 601da177e4SLinus Torvalds 611da177e4SLinus Torvalds /* The ccw bus type uses this table to find devices that it sends to 621da177e4SLinus Torvalds * dasd_eckd_probe */ 631da177e4SLinus Torvalds static struct ccw_device_id dasd_eckd_ids[] = { 64d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1}, 65d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2}, 66d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3390, 0), .driver_info = 0x3}, 67d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4}, 68d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5}, 69d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6}, 70d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7}, 71d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8}, 72d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9}, 73d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa}, 741da177e4SLinus Torvalds { /* end of list */ }, 751da177e4SLinus Torvalds }; 761da177e4SLinus Torvalds 771da177e4SLinus Torvalds MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids); 781da177e4SLinus Torvalds 791da177e4SLinus Torvalds static struct ccw_driver dasd_eckd_driver; /* see below */ 801da177e4SLinus Torvalds 81eb6e199bSStefan Weinhuber #define INIT_CQR_OK 0 82eb6e199bSStefan Weinhuber #define INIT_CQR_UNFORMATTED 1 83eb6e199bSStefan Weinhuber #define INIT_CQR_ERROR 2 84eb6e199bSStefan Weinhuber 85f932bceaSStefan Weinhuber /* emergency request for reserve/release */ 86f932bceaSStefan Weinhuber static struct { 87f932bceaSStefan Weinhuber struct dasd_ccw_req cqr; 88f932bceaSStefan Weinhuber struct ccw1 ccw; 89f932bceaSStefan Weinhuber char data[32]; 90f932bceaSStefan Weinhuber } *dasd_reserve_req; 91f932bceaSStefan Weinhuber static DEFINE_MUTEX(dasd_reserve_mutex); 92f932bceaSStefan Weinhuber 93eb6e199bSStefan Weinhuber 941da177e4SLinus Torvalds /* initial attempt at a probe function. this can be simplified once 951da177e4SLinus Torvalds * the other detection code is gone */ 961da177e4SLinus Torvalds static int 971da177e4SLinus Torvalds dasd_eckd_probe (struct ccw_device *cdev) 981da177e4SLinus Torvalds { 991da177e4SLinus Torvalds int ret; 1001da177e4SLinus Torvalds 10140545573SHorst Hummel /* set ECKD specific ccw-device options */ 102454e1fa1SPeter Oberparleiter ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE | 103454e1fa1SPeter Oberparleiter CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH); 10440545573SHorst Hummel if (ret) { 105b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s", 106b8ed5dd5SStefan Haberland "dasd_eckd_probe: could not set " 107b8ed5dd5SStefan Haberland "ccw-device options"); 1081da177e4SLinus Torvalds return ret; 10940545573SHorst Hummel } 11040545573SHorst Hummel ret = dasd_generic_probe(cdev, &dasd_eckd_discipline); 11140545573SHorst Hummel return ret; 1121da177e4SLinus Torvalds } 1131da177e4SLinus Torvalds 1141da177e4SLinus Torvalds static int 1151da177e4SLinus Torvalds dasd_eckd_set_online(struct ccw_device *cdev) 1161da177e4SLinus Torvalds { 1171da177e4SLinus Torvalds return dasd_generic_set_online(cdev, &dasd_eckd_discipline); 1181da177e4SLinus Torvalds } 1191da177e4SLinus Torvalds 1201da177e4SLinus Torvalds static const int sizes_trk0[] = { 28, 148, 84 }; 1211da177e4SLinus Torvalds #define LABEL_SIZE 140 1221da177e4SLinus Torvalds 1231da177e4SLinus Torvalds static inline unsigned int 1241da177e4SLinus Torvalds round_up_multiple(unsigned int no, unsigned int mult) 1251da177e4SLinus Torvalds { 1261da177e4SLinus Torvalds int rem = no % mult; 1271da177e4SLinus Torvalds return (rem ? no - rem + mult : no); 1281da177e4SLinus Torvalds } 1291da177e4SLinus Torvalds 1301da177e4SLinus Torvalds static inline unsigned int 1311da177e4SLinus Torvalds ceil_quot(unsigned int d1, unsigned int d2) 1321da177e4SLinus Torvalds { 1331da177e4SLinus Torvalds return (d1 + (d2 - 1)) / d2; 1341da177e4SLinus Torvalds } 1351da177e4SLinus Torvalds 1364d284cacSHeiko Carstens static unsigned int 1371da177e4SLinus Torvalds recs_per_track(struct dasd_eckd_characteristics * rdc, 1381da177e4SLinus Torvalds unsigned int kl, unsigned int dl) 1391da177e4SLinus Torvalds { 1401da177e4SLinus Torvalds int dn, kn; 1411da177e4SLinus Torvalds 1421da177e4SLinus Torvalds switch (rdc->dev_type) { 1431da177e4SLinus Torvalds case 0x3380: 1441da177e4SLinus Torvalds if (kl) 1451da177e4SLinus Torvalds return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + 1461da177e4SLinus Torvalds ceil_quot(dl + 12, 32)); 1471da177e4SLinus Torvalds else 1481da177e4SLinus Torvalds return 1499 / (15 + ceil_quot(dl + 12, 32)); 1491da177e4SLinus Torvalds case 0x3390: 1501da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1511da177e4SLinus Torvalds if (kl) { 1521da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1531da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + 1541da177e4SLinus Torvalds 9 + ceil_quot(dl + 6 * dn, 34)); 1551da177e4SLinus Torvalds } else 1561da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); 1571da177e4SLinus Torvalds case 0x9345: 1581da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1591da177e4SLinus Torvalds if (kl) { 1601da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1611da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + 1621da177e4SLinus Torvalds ceil_quot(dl + 6 * dn, 34)); 1631da177e4SLinus Torvalds } else 1641da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); 1651da177e4SLinus Torvalds } 1661da177e4SLinus Torvalds return 0; 1671da177e4SLinus Torvalds } 1681da177e4SLinus Torvalds 169b44b0ab3SStefan Weinhuber static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head) 170b44b0ab3SStefan Weinhuber { 171b44b0ab3SStefan Weinhuber geo->cyl = (__u16) cyl; 172b44b0ab3SStefan Weinhuber geo->head = cyl >> 16; 173b44b0ab3SStefan Weinhuber geo->head <<= 4; 174b44b0ab3SStefan Weinhuber geo->head |= head; 175b44b0ab3SStefan Weinhuber } 176b44b0ab3SStefan Weinhuber 1774d284cacSHeiko Carstens static int 1781da177e4SLinus Torvalds check_XRC (struct ccw1 *de_ccw, 1791da177e4SLinus Torvalds struct DE_eckd_data *data, 1801da177e4SLinus Torvalds struct dasd_device *device) 1811da177e4SLinus Torvalds { 1821da177e4SLinus Torvalds struct dasd_eckd_private *private; 183d54853efSMartin Schwidefsky int rc; 1841da177e4SLinus Torvalds 1851da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 186d54853efSMartin Schwidefsky if (!private->rdc_data.facilities.XRC_supported) 187d54853efSMartin Schwidefsky return 0; 1881da177e4SLinus Torvalds 1891da177e4SLinus Torvalds /* switch on System Time Stamp - needed for XRC Support */ 1901da177e4SLinus Torvalds data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ 1911da177e4SLinus Torvalds data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ 1921da177e4SLinus Torvalds 193d54853efSMartin Schwidefsky rc = get_sync_clock(&data->ep_sys_time); 194d54853efSMartin Schwidefsky /* Ignore return code if sync clock is switched off. */ 195d54853efSMartin Schwidefsky if (rc == -ENOSYS || rc == -EACCES) 196d54853efSMartin Schwidefsky rc = 0; 1971da177e4SLinus Torvalds 1981da177e4SLinus Torvalds de_ccw->count = sizeof(struct DE_eckd_data); 1991da177e4SLinus Torvalds de_ccw->flags |= CCW_FLAG_SLI; 200d54853efSMartin Schwidefsky return rc; 2011da177e4SLinus Torvalds } 2021da177e4SLinus Torvalds 2034d284cacSHeiko Carstens static int 204b44b0ab3SStefan Weinhuber define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk, 205b44b0ab3SStefan Weinhuber unsigned int totrk, int cmd, struct dasd_device *device) 2061da177e4SLinus Torvalds { 2071da177e4SLinus Torvalds struct dasd_eckd_private *private; 208b44b0ab3SStefan Weinhuber u32 begcyl, endcyl; 209b44b0ab3SStefan Weinhuber u16 heads, beghead, endhead; 210d54853efSMartin Schwidefsky int rc = 0; 2111da177e4SLinus Torvalds 2121da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 2131da177e4SLinus Torvalds 2141da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; 2151da177e4SLinus Torvalds ccw->flags = 0; 2161da177e4SLinus Torvalds ccw->count = 16; 2171da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 2181da177e4SLinus Torvalds 2191da177e4SLinus Torvalds memset(data, 0, sizeof(struct DE_eckd_data)); 2201da177e4SLinus Torvalds switch (cmd) { 2211da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 2221da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 2231da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 2241da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 2251da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 2261da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 2271da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 2281da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 2291da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_COUNT: 2301da177e4SLinus Torvalds data->mask.perm = 0x1; 2311da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 2321da177e4SLinus Torvalds break; 2331da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 2341da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 2351da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 2361da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 2371da177e4SLinus Torvalds data->mask.perm = 0x02; 2381da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 239d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2401da177e4SLinus Torvalds break; 2411da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 2421da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 2431da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 244d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2451da177e4SLinus Torvalds break; 2461da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 2471da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 2481da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 2491da177e4SLinus Torvalds data->mask.perm = 0x3; 2501da177e4SLinus Torvalds data->mask.auth = 0x1; 2511da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 252d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2531da177e4SLinus Torvalds break; 2541da177e4SLinus Torvalds default: 255fc19f381SStefan Haberland dev_err(&device->cdev->dev, 256fc19f381SStefan Haberland "0x%x is not a known command\n", cmd); 2571da177e4SLinus Torvalds break; 2581da177e4SLinus Torvalds } 2591da177e4SLinus Torvalds 2601da177e4SLinus Torvalds data->attributes.mode = 0x3; /* ECKD */ 2611da177e4SLinus Torvalds 2621da177e4SLinus Torvalds if ((private->rdc_data.cu_type == 0x2105 || 2631da177e4SLinus Torvalds private->rdc_data.cu_type == 0x2107 || 2641da177e4SLinus Torvalds private->rdc_data.cu_type == 0x1750) 2651da177e4SLinus Torvalds && !(private->uses_cdl && trk < 2)) 2661da177e4SLinus Torvalds data->ga_extended |= 0x40; /* Regular Data Format Mode */ 2671da177e4SLinus Torvalds 268b44b0ab3SStefan Weinhuber heads = private->rdc_data.trk_per_cyl; 269b44b0ab3SStefan Weinhuber begcyl = trk / heads; 270b44b0ab3SStefan Weinhuber beghead = trk % heads; 271b44b0ab3SStefan Weinhuber endcyl = totrk / heads; 272b44b0ab3SStefan Weinhuber endhead = totrk % heads; 2731da177e4SLinus Torvalds 2741da177e4SLinus Torvalds /* check for sequential prestage - enhance cylinder range */ 2751da177e4SLinus Torvalds if (data->attributes.operation == DASD_SEQ_PRESTAGE || 2761da177e4SLinus Torvalds data->attributes.operation == DASD_SEQ_ACCESS) { 2771da177e4SLinus Torvalds 278b44b0ab3SStefan Weinhuber if (endcyl + private->attrib.nr_cyl < private->real_cyl) 279b44b0ab3SStefan Weinhuber endcyl += private->attrib.nr_cyl; 2801da177e4SLinus Torvalds else 281b44b0ab3SStefan Weinhuber endcyl = (private->real_cyl - 1); 2821da177e4SLinus Torvalds } 2831da177e4SLinus Torvalds 284b44b0ab3SStefan Weinhuber set_ch_t(&data->beg_ext, begcyl, beghead); 285b44b0ab3SStefan Weinhuber set_ch_t(&data->end_ext, endcyl, endhead); 286d54853efSMartin Schwidefsky return rc; 2871da177e4SLinus Torvalds } 2881da177e4SLinus Torvalds 2898e09f215SStefan Weinhuber static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata, 2908e09f215SStefan Weinhuber struct dasd_device *device) 2918e09f215SStefan Weinhuber { 2928e09f215SStefan Weinhuber struct dasd_eckd_private *private; 2938e09f215SStefan Weinhuber int rc; 2948e09f215SStefan Weinhuber 2958e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 2968e09f215SStefan Weinhuber if (!private->rdc_data.facilities.XRC_supported) 2978e09f215SStefan Weinhuber return 0; 2988e09f215SStefan Weinhuber 2998e09f215SStefan Weinhuber /* switch on System Time Stamp - needed for XRC Support */ 300f3eb5384SStefan Weinhuber pfxdata->define_extent.ga_extended |= 0x08; /* 'Time Stamp Valid' */ 301f3eb5384SStefan Weinhuber pfxdata->define_extent.ga_extended |= 0x02; /* 'Extended Parameter' */ 3028e09f215SStefan Weinhuber pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */ 3038e09f215SStefan Weinhuber 304f3eb5384SStefan Weinhuber rc = get_sync_clock(&pfxdata->define_extent.ep_sys_time); 3058e09f215SStefan Weinhuber /* Ignore return code if sync clock is switched off. */ 3068e09f215SStefan Weinhuber if (rc == -ENOSYS || rc == -EACCES) 3078e09f215SStefan Weinhuber rc = 0; 3088e09f215SStefan Weinhuber return rc; 3098e09f215SStefan Weinhuber } 3108e09f215SStefan Weinhuber 311f3eb5384SStefan Weinhuber static void fill_LRE_data(struct LRE_eckd_data *data, unsigned int trk, 312f3eb5384SStefan Weinhuber unsigned int rec_on_trk, int count, int cmd, 313f3eb5384SStefan Weinhuber struct dasd_device *device, unsigned int reclen, 314f3eb5384SStefan Weinhuber unsigned int tlf) 315f3eb5384SStefan Weinhuber { 316f3eb5384SStefan Weinhuber struct dasd_eckd_private *private; 317f3eb5384SStefan Weinhuber int sector; 318f3eb5384SStefan Weinhuber int dn, d; 319f3eb5384SStefan Weinhuber 320f3eb5384SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 321f3eb5384SStefan Weinhuber 322f3eb5384SStefan Weinhuber memset(data, 0, sizeof(*data)); 323f3eb5384SStefan Weinhuber sector = 0; 324f3eb5384SStefan Weinhuber if (rec_on_trk) { 325f3eb5384SStefan Weinhuber switch (private->rdc_data.dev_type) { 326f3eb5384SStefan Weinhuber case 0x3390: 327f3eb5384SStefan Weinhuber dn = ceil_quot(reclen + 6, 232); 328f3eb5384SStefan Weinhuber d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 329f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 330f3eb5384SStefan Weinhuber break; 331f3eb5384SStefan Weinhuber case 0x3380: 332f3eb5384SStefan Weinhuber d = 7 + ceil_quot(reclen + 12, 32); 333f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 334f3eb5384SStefan Weinhuber break; 335f3eb5384SStefan Weinhuber } 336f3eb5384SStefan Weinhuber } 337f3eb5384SStefan Weinhuber data->sector = sector; 338f3eb5384SStefan Weinhuber /* note: meaning of count depends on the operation 339f3eb5384SStefan Weinhuber * for record based I/O it's the number of records, but for 340f3eb5384SStefan Weinhuber * track based I/O it's the number of tracks 341f3eb5384SStefan Weinhuber */ 342f3eb5384SStefan Weinhuber data->count = count; 343f3eb5384SStefan Weinhuber switch (cmd) { 344f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 345f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 346f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 347f3eb5384SStefan Weinhuber break; 348f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_HOME_ADDRESS: 349f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 350f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 351f3eb5384SStefan Weinhuber break; 352f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 353f3eb5384SStefan Weinhuber data->operation.orientation = 0x1; 354f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 355f3eb5384SStefan Weinhuber data->count++; 356f3eb5384SStefan Weinhuber break; 357f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_RECORD_ZERO: 358f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 359f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 360f3eb5384SStefan Weinhuber data->count++; 361f3eb5384SStefan Weinhuber break; 362f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE: 363f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_MT: 364f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD: 365f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD_MT: 366f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 367f3eb5384SStefan Weinhuber data->length = reclen; 368f3eb5384SStefan Weinhuber data->operation.operation = 0x01; 369f3eb5384SStefan Weinhuber break; 370f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD: 371f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD_MT: 372f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 373f3eb5384SStefan Weinhuber data->length = reclen; 374f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 375f3eb5384SStefan Weinhuber break; 376f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 377f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 378f3eb5384SStefan Weinhuber data->length = reclen; /* not tlf, as one might think */ 379f3eb5384SStefan Weinhuber data->operation.operation = 0x3F; 380f3eb5384SStefan Weinhuber data->extended_operation = 0x23; 381f3eb5384SStefan Weinhuber break; 382f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ: 383f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_MT: 384f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_KD: 385f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_KD_MT: 386f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 387f3eb5384SStefan Weinhuber data->length = reclen; 388f3eb5384SStefan Weinhuber data->operation.operation = 0x06; 389f3eb5384SStefan Weinhuber break; 390f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD: 391f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD_MT: 392f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 393f3eb5384SStefan Weinhuber data->length = reclen; 394f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 395f3eb5384SStefan Weinhuber break; 396f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_COUNT: 397f3eb5384SStefan Weinhuber data->operation.operation = 0x06; 398f3eb5384SStefan Weinhuber break; 399f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 400f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 401f3eb5384SStefan Weinhuber data->length = tlf; 402f3eb5384SStefan Weinhuber data->operation.operation = 0x0C; 403f3eb5384SStefan Weinhuber break; 404f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_ERASE: 405f3eb5384SStefan Weinhuber data->length = reclen; 406f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 407f3eb5384SStefan Weinhuber data->operation.operation = 0x0b; 408f3eb5384SStefan Weinhuber break; 409f3eb5384SStefan Weinhuber default: 410f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, device, 411f3eb5384SStefan Weinhuber "fill LRE unknown opcode 0x%x", cmd); 412f3eb5384SStefan Weinhuber BUG(); 413f3eb5384SStefan Weinhuber } 414f3eb5384SStefan Weinhuber set_ch_t(&data->seek_addr, 415f3eb5384SStefan Weinhuber trk / private->rdc_data.trk_per_cyl, 416f3eb5384SStefan Weinhuber trk % private->rdc_data.trk_per_cyl); 417f3eb5384SStefan Weinhuber data->search_arg.cyl = data->seek_addr.cyl; 418f3eb5384SStefan Weinhuber data->search_arg.head = data->seek_addr.head; 419f3eb5384SStefan Weinhuber data->search_arg.record = rec_on_trk; 420f3eb5384SStefan Weinhuber } 421f3eb5384SStefan Weinhuber 422f3eb5384SStefan Weinhuber static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 423b44b0ab3SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 424f3eb5384SStefan Weinhuber struct dasd_device *basedev, struct dasd_device *startdev, 425f3eb5384SStefan Weinhuber unsigned char format, unsigned int rec_on_trk, int count, 426f3eb5384SStefan Weinhuber unsigned int blksize, unsigned int tlf) 4278e09f215SStefan Weinhuber { 4288e09f215SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 429f3eb5384SStefan Weinhuber struct DE_eckd_data *dedata; 430f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 431b44b0ab3SStefan Weinhuber u32 begcyl, endcyl; 432b44b0ab3SStefan Weinhuber u16 heads, beghead, endhead; 4338e09f215SStefan Weinhuber int rc = 0; 4348e09f215SStefan Weinhuber 4358e09f215SStefan Weinhuber basepriv = (struct dasd_eckd_private *) basedev->private; 4368e09f215SStefan Weinhuber startpriv = (struct dasd_eckd_private *) startdev->private; 437f3eb5384SStefan Weinhuber dedata = &pfxdata->define_extent; 438f3eb5384SStefan Weinhuber lredata = &pfxdata->locate_record; 4398e09f215SStefan Weinhuber 4408e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PFX; 4418e09f215SStefan Weinhuber ccw->flags = 0; 4428e09f215SStefan Weinhuber ccw->count = sizeof(*pfxdata); 4438e09f215SStefan Weinhuber ccw->cda = (__u32) __pa(pfxdata); 4448e09f215SStefan Weinhuber 4458e09f215SStefan Weinhuber memset(pfxdata, 0, sizeof(*pfxdata)); 4468e09f215SStefan Weinhuber /* prefix data */ 447f3eb5384SStefan Weinhuber if (format > 1) { 448f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 449f3eb5384SStefan Weinhuber "PFX LRE unknown format 0x%x", format); 450f3eb5384SStefan Weinhuber BUG(); 451f3eb5384SStefan Weinhuber return -EINVAL; 452f3eb5384SStefan Weinhuber } 453f3eb5384SStefan Weinhuber pfxdata->format = format; 4544abb08c2SStefan Weinhuber pfxdata->base_address = basepriv->ned->unit_addr; 4554abb08c2SStefan Weinhuber pfxdata->base_lss = basepriv->ned->ID; 456f3eb5384SStefan Weinhuber pfxdata->validity.define_extent = 1; 4578e09f215SStefan Weinhuber 4588e09f215SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 4598e09f215SStefan Weinhuber if (startpriv->uid.type != UA_BASE_DEVICE) { 4608e09f215SStefan Weinhuber pfxdata->validity.verify_base = 1; 4618e09f215SStefan Weinhuber if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 4628e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 1; 4638e09f215SStefan Weinhuber } 4648e09f215SStefan Weinhuber 4658e09f215SStefan Weinhuber /* define extend data (mostly)*/ 4668e09f215SStefan Weinhuber switch (cmd) { 4678e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_HOME_ADDRESS: 4688e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_RECORD_ZERO: 4698e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ: 4708e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_MT: 4718e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD: 4728e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD_MT: 4738e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_KD: 4748e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_KD_MT: 4758e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_COUNT: 476f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 477f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 478f3eb5384SStefan Weinhuber break; 479f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 480f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 481f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 482f3eb5384SStefan Weinhuber dedata->blk_size = 0; 4838e09f215SStefan Weinhuber break; 4848e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE: 4858e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_MT: 4868e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD: 4878e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD_MT: 488f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 489f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 4908e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 4918e09f215SStefan Weinhuber break; 4928e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD: 4938e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD_MT: 494f3eb5384SStefan Weinhuber dedata->attributes.operation = DASD_BYPASS_CACHE; 4958e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 4968e09f215SStefan Weinhuber break; 4978e09f215SStefan Weinhuber case DASD_ECKD_CCW_ERASE: 4988e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 4998e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 500f3eb5384SStefan Weinhuber dedata->mask.perm = 0x3; 501f3eb5384SStefan Weinhuber dedata->mask.auth = 0x1; 502f3eb5384SStefan Weinhuber dedata->attributes.operation = DASD_BYPASS_CACHE; 503f3eb5384SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 504f3eb5384SStefan Weinhuber break; 505f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 506f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 507f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 508f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 5098e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 5108e09f215SStefan Weinhuber break; 5118e09f215SStefan Weinhuber default: 512f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 513f3eb5384SStefan Weinhuber "PFX LRE unknown opcode 0x%x", cmd); 514f3eb5384SStefan Weinhuber BUG(); 515f3eb5384SStefan Weinhuber return -EINVAL; 5168e09f215SStefan Weinhuber } 5178e09f215SStefan Weinhuber 518f3eb5384SStefan Weinhuber dedata->attributes.mode = 0x3; /* ECKD */ 5198e09f215SStefan Weinhuber 5208e09f215SStefan Weinhuber if ((basepriv->rdc_data.cu_type == 0x2105 || 5218e09f215SStefan Weinhuber basepriv->rdc_data.cu_type == 0x2107 || 5228e09f215SStefan Weinhuber basepriv->rdc_data.cu_type == 0x1750) 5238e09f215SStefan Weinhuber && !(basepriv->uses_cdl && trk < 2)) 524f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x40; /* Regular Data Format Mode */ 5258e09f215SStefan Weinhuber 526b44b0ab3SStefan Weinhuber heads = basepriv->rdc_data.trk_per_cyl; 527b44b0ab3SStefan Weinhuber begcyl = trk / heads; 528b44b0ab3SStefan Weinhuber beghead = trk % heads; 529b44b0ab3SStefan Weinhuber endcyl = totrk / heads; 530b44b0ab3SStefan Weinhuber endhead = totrk % heads; 5318e09f215SStefan Weinhuber 5328e09f215SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 533f3eb5384SStefan Weinhuber if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 534f3eb5384SStefan Weinhuber dedata->attributes.operation == DASD_SEQ_ACCESS) { 5358e09f215SStefan Weinhuber 536b44b0ab3SStefan Weinhuber if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 537b44b0ab3SStefan Weinhuber endcyl += basepriv->attrib.nr_cyl; 5388e09f215SStefan Weinhuber else 539b44b0ab3SStefan Weinhuber endcyl = (basepriv->real_cyl - 1); 5408e09f215SStefan Weinhuber } 5418e09f215SStefan Weinhuber 542f3eb5384SStefan Weinhuber set_ch_t(&dedata->beg_ext, begcyl, beghead); 543f3eb5384SStefan Weinhuber set_ch_t(&dedata->end_ext, endcyl, endhead); 544f3eb5384SStefan Weinhuber 545f3eb5384SStefan Weinhuber if (format == 1) { 546f3eb5384SStefan Weinhuber fill_LRE_data(lredata, trk, rec_on_trk, count, cmd, 547f3eb5384SStefan Weinhuber basedev, blksize, tlf); 548f3eb5384SStefan Weinhuber } 549f3eb5384SStefan Weinhuber 5508e09f215SStefan Weinhuber return rc; 5518e09f215SStefan Weinhuber } 5528e09f215SStefan Weinhuber 553f3eb5384SStefan Weinhuber static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 554f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 555f3eb5384SStefan Weinhuber struct dasd_device *basedev, struct dasd_device *startdev) 556f3eb5384SStefan Weinhuber { 557f3eb5384SStefan Weinhuber return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev, 558f3eb5384SStefan Weinhuber 0, 0, 0, 0, 0); 559f3eb5384SStefan Weinhuber } 560f3eb5384SStefan Weinhuber 5614d284cacSHeiko Carstens static void 562b44b0ab3SStefan Weinhuber locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk, 563b44b0ab3SStefan Weinhuber unsigned int rec_on_trk, int no_rec, int cmd, 5641da177e4SLinus Torvalds struct dasd_device * device, int reclen) 5651da177e4SLinus Torvalds { 5661da177e4SLinus Torvalds struct dasd_eckd_private *private; 5671da177e4SLinus Torvalds int sector; 5681da177e4SLinus Torvalds int dn, d; 5691da177e4SLinus Torvalds 5701da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 5711da177e4SLinus Torvalds 5721da177e4SLinus Torvalds DBF_DEV_EVENT(DBF_INFO, device, 5731da177e4SLinus Torvalds "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", 5741da177e4SLinus Torvalds trk, rec_on_trk, no_rec, cmd, reclen); 5751da177e4SLinus Torvalds 5761da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; 5771da177e4SLinus Torvalds ccw->flags = 0; 5781da177e4SLinus Torvalds ccw->count = 16; 5791da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 5801da177e4SLinus Torvalds 5811da177e4SLinus Torvalds memset(data, 0, sizeof(struct LO_eckd_data)); 5821da177e4SLinus Torvalds sector = 0; 5831da177e4SLinus Torvalds if (rec_on_trk) { 5841da177e4SLinus Torvalds switch (private->rdc_data.dev_type) { 5851da177e4SLinus Torvalds case 0x3390: 5861da177e4SLinus Torvalds dn = ceil_quot(reclen + 6, 232); 5871da177e4SLinus Torvalds d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 5881da177e4SLinus Torvalds sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 5891da177e4SLinus Torvalds break; 5901da177e4SLinus Torvalds case 0x3380: 5911da177e4SLinus Torvalds d = 7 + ceil_quot(reclen + 12, 32); 5921da177e4SLinus Torvalds sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 5931da177e4SLinus Torvalds break; 5941da177e4SLinus Torvalds } 5951da177e4SLinus Torvalds } 5961da177e4SLinus Torvalds data->sector = sector; 5971da177e4SLinus Torvalds data->count = no_rec; 5981da177e4SLinus Torvalds switch (cmd) { 5991da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 6001da177e4SLinus Torvalds data->operation.orientation = 0x3; 6011da177e4SLinus Torvalds data->operation.operation = 0x03; 6021da177e4SLinus Torvalds break; 6031da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 6041da177e4SLinus Torvalds data->operation.orientation = 0x3; 6051da177e4SLinus Torvalds data->operation.operation = 0x16; 6061da177e4SLinus Torvalds break; 6071da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 6081da177e4SLinus Torvalds data->operation.orientation = 0x1; 6091da177e4SLinus Torvalds data->operation.operation = 0x03; 6101da177e4SLinus Torvalds data->count++; 6111da177e4SLinus Torvalds break; 6121da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 6131da177e4SLinus Torvalds data->operation.orientation = 0x3; 6141da177e4SLinus Torvalds data->operation.operation = 0x16; 6151da177e4SLinus Torvalds data->count++; 6161da177e4SLinus Torvalds break; 6171da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 6181da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 6191da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 6201da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 6211da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6221da177e4SLinus Torvalds data->length = reclen; 6231da177e4SLinus Torvalds data->operation.operation = 0x01; 6241da177e4SLinus Torvalds break; 6251da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 6261da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 6271da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6281da177e4SLinus Torvalds data->length = reclen; 6291da177e4SLinus Torvalds data->operation.operation = 0x03; 6301da177e4SLinus Torvalds break; 6311da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 6321da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 6331da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 6341da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 6351da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6361da177e4SLinus Torvalds data->length = reclen; 6371da177e4SLinus Torvalds data->operation.operation = 0x06; 6381da177e4SLinus Torvalds break; 6391da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 6401da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 6411da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6421da177e4SLinus Torvalds data->length = reclen; 6431da177e4SLinus Torvalds data->operation.operation = 0x16; 6441da177e4SLinus Torvalds break; 6451da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_COUNT: 6461da177e4SLinus Torvalds data->operation.operation = 0x06; 6471da177e4SLinus Torvalds break; 6481da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 6491da177e4SLinus Torvalds data->length = reclen; 6501da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6511da177e4SLinus Torvalds data->operation.operation = 0x0b; 6521da177e4SLinus Torvalds break; 6531da177e4SLinus Torvalds default: 654fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record " 655fc19f381SStefan Haberland "opcode 0x%x", cmd); 6561da177e4SLinus Torvalds } 657b44b0ab3SStefan Weinhuber set_ch_t(&data->seek_addr, 658b44b0ab3SStefan Weinhuber trk / private->rdc_data.trk_per_cyl, 659b44b0ab3SStefan Weinhuber trk % private->rdc_data.trk_per_cyl); 660b44b0ab3SStefan Weinhuber data->search_arg.cyl = data->seek_addr.cyl; 661b44b0ab3SStefan Weinhuber data->search_arg.head = data->seek_addr.head; 6621da177e4SLinus Torvalds data->search_arg.record = rec_on_trk; 6631da177e4SLinus Torvalds } 6641da177e4SLinus Torvalds 6651da177e4SLinus Torvalds /* 6661da177e4SLinus Torvalds * Returns 1 if the block is one of the special blocks that needs 6671da177e4SLinus Torvalds * to get read/written with the KD variant of the command. 6681da177e4SLinus Torvalds * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and 6691da177e4SLinus Torvalds * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. 6701da177e4SLinus Torvalds * Luckily the KD variants differ only by one bit (0x08) from the 6711da177e4SLinus Torvalds * normal variant. So don't wonder about code like: 6721da177e4SLinus Torvalds * if (dasd_eckd_cdl_special(blk_per_trk, recid)) 6731da177e4SLinus Torvalds * ccw->cmd_code |= 0x8; 6741da177e4SLinus Torvalds */ 6751da177e4SLinus Torvalds static inline int 6761da177e4SLinus Torvalds dasd_eckd_cdl_special(int blk_per_trk, int recid) 6771da177e4SLinus Torvalds { 6781da177e4SLinus Torvalds if (recid < 3) 6791da177e4SLinus Torvalds return 1; 6801da177e4SLinus Torvalds if (recid < blk_per_trk) 6811da177e4SLinus Torvalds return 0; 6821da177e4SLinus Torvalds if (recid < 2 * blk_per_trk) 6831da177e4SLinus Torvalds return 1; 6841da177e4SLinus Torvalds return 0; 6851da177e4SLinus Torvalds } 6861da177e4SLinus Torvalds 6871da177e4SLinus Torvalds /* 6881da177e4SLinus Torvalds * Returns the record size for the special blocks of the cdl format. 6891da177e4SLinus Torvalds * Only returns something useful if dasd_eckd_cdl_special is true 6901da177e4SLinus Torvalds * for the recid. 6911da177e4SLinus Torvalds */ 6921da177e4SLinus Torvalds static inline int 6931da177e4SLinus Torvalds dasd_eckd_cdl_reclen(int recid) 6941da177e4SLinus Torvalds { 6951da177e4SLinus Torvalds if (recid < 3) 6961da177e4SLinus Torvalds return sizes_trk0[recid]; 6971da177e4SLinus Torvalds return LABEL_SIZE; 6981da177e4SLinus Torvalds } 6991da177e4SLinus Torvalds 7003d052595SHorst Hummel /* 7013d052595SHorst Hummel * Generate device unique id that specifies the physical device. 7023d052595SHorst Hummel */ 7032dedf0d9SStefan Haberland static int dasd_eckd_generate_uid(struct dasd_device *device) 7043d052595SHorst Hummel { 7053d052595SHorst Hummel struct dasd_eckd_private *private; 7062dedf0d9SStefan Haberland struct dasd_uid *uid; 7074abb08c2SStefan Weinhuber int count; 7082dedf0d9SStefan Haberland unsigned long flags; 7093d052595SHorst Hummel 7103d052595SHorst Hummel private = (struct dasd_eckd_private *) device->private; 7113d052595SHorst Hummel if (!private) 7123d052595SHorst Hummel return -ENODEV; 7134abb08c2SStefan Weinhuber if (!private->ned || !private->gneq) 7143d052595SHorst Hummel return -ENODEV; 7152dedf0d9SStefan Haberland uid = &private->uid; 7162dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 7173d052595SHorst Hummel memset(uid, 0, sizeof(struct dasd_uid)); 7184abb08c2SStefan Weinhuber memcpy(uid->vendor, private->ned->HDA_manufacturer, 7193d052595SHorst Hummel sizeof(uid->vendor) - 1); 7203d052595SHorst Hummel EBCASC(uid->vendor, sizeof(uid->vendor) - 1); 7214abb08c2SStefan Weinhuber memcpy(uid->serial, private->ned->HDA_location, 7223d052595SHorst Hummel sizeof(uid->serial) - 1); 7233d052595SHorst Hummel EBCASC(uid->serial, sizeof(uid->serial) - 1); 7244abb08c2SStefan Weinhuber uid->ssid = private->gneq->subsystemID; 725a419aef8SJoe Perches uid->real_unit_addr = private->ned->unit_addr; 7264abb08c2SStefan Weinhuber if (private->sneq) { 7274abb08c2SStefan Weinhuber uid->type = private->sneq->sua_flags; 7288e09f215SStefan Weinhuber if (uid->type == UA_BASE_PAV_ALIAS) 7294abb08c2SStefan Weinhuber uid->base_unit_addr = private->sneq->base_unit_addr; 7308e09f215SStefan Weinhuber } else { 7318e09f215SStefan Weinhuber uid->type = UA_BASE_DEVICE; 7328e09f215SStefan Weinhuber } 7334abb08c2SStefan Weinhuber if (private->vdsneq) { 7344abb08c2SStefan Weinhuber for (count = 0; count < 16; count++) { 7354abb08c2SStefan Weinhuber sprintf(uid->vduit+2*count, "%02x", 7364abb08c2SStefan Weinhuber private->vdsneq->uit[count]); 7374abb08c2SStefan Weinhuber } 7384abb08c2SStefan Weinhuber } 7392dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 7403d052595SHorst Hummel return 0; 7413d052595SHorst Hummel } 7423d052595SHorst Hummel 7432dedf0d9SStefan Haberland static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid) 7442dedf0d9SStefan Haberland { 7452dedf0d9SStefan Haberland struct dasd_eckd_private *private; 7462dedf0d9SStefan Haberland unsigned long flags; 7472dedf0d9SStefan Haberland 7482dedf0d9SStefan Haberland if (device->private) { 7492dedf0d9SStefan Haberland private = (struct dasd_eckd_private *)device->private; 7502dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 7512dedf0d9SStefan Haberland *uid = private->uid; 7522dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 7532dedf0d9SStefan Haberland return 0; 7542dedf0d9SStefan Haberland } 7552dedf0d9SStefan Haberland return -EINVAL; 7562dedf0d9SStefan Haberland } 7572dedf0d9SStefan Haberland 758763968e2SHeiko Carstens static struct dasd_ccw_req *dasd_eckd_build_rcd_lpm(struct dasd_device *device, 75917283b56SCornelia Huck void *rcd_buffer, 76017283b56SCornelia Huck struct ciw *ciw, __u8 lpm) 76117283b56SCornelia Huck { 76217283b56SCornelia Huck struct dasd_ccw_req *cqr; 76317283b56SCornelia Huck struct ccw1 *ccw; 76417283b56SCornelia Huck 76568b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, ciw->count, 76668b781feSStefan Haberland device); 76717283b56SCornelia Huck 76817283b56SCornelia Huck if (IS_ERR(cqr)) { 769fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 77017283b56SCornelia Huck "Could not allocate RCD request"); 77117283b56SCornelia Huck return cqr; 77217283b56SCornelia Huck } 77317283b56SCornelia Huck 77417283b56SCornelia Huck ccw = cqr->cpaddr; 77517283b56SCornelia Huck ccw->cmd_code = ciw->cmd; 77617283b56SCornelia Huck ccw->cda = (__u32)(addr_t)rcd_buffer; 77717283b56SCornelia Huck ccw->count = ciw->count; 77817283b56SCornelia Huck 7798e09f215SStefan Weinhuber cqr->startdev = device; 7808e09f215SStefan Weinhuber cqr->memdev = device; 7818e09f215SStefan Weinhuber cqr->block = NULL; 78217283b56SCornelia Huck cqr->expires = 10*HZ; 78317283b56SCornelia Huck cqr->lpm = lpm; 784eb6e199bSStefan Weinhuber cqr->retries = 256; 78517283b56SCornelia Huck cqr->buildclk = get_clock(); 78617283b56SCornelia Huck cqr->status = DASD_CQR_FILLED; 78717283b56SCornelia Huck return cqr; 78817283b56SCornelia Huck } 78917283b56SCornelia Huck 79017283b56SCornelia Huck static int dasd_eckd_read_conf_lpm(struct dasd_device *device, 79117283b56SCornelia Huck void **rcd_buffer, 79217283b56SCornelia Huck int *rcd_buffer_size, __u8 lpm) 79317283b56SCornelia Huck { 79417283b56SCornelia Huck struct ciw *ciw; 79517283b56SCornelia Huck char *rcd_buf = NULL; 79617283b56SCornelia Huck int ret; 79717283b56SCornelia Huck struct dasd_ccw_req *cqr; 79817283b56SCornelia Huck 79917283b56SCornelia Huck /* 80017283b56SCornelia Huck * scan for RCD command in extended SenseID data 80117283b56SCornelia Huck */ 80217283b56SCornelia Huck ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 80317283b56SCornelia Huck if (!ciw || ciw->cmd == 0) { 80417283b56SCornelia Huck ret = -EOPNOTSUPP; 80517283b56SCornelia Huck goto out_error; 80617283b56SCornelia Huck } 80717283b56SCornelia Huck rcd_buf = kzalloc(ciw->count, GFP_KERNEL | GFP_DMA); 80817283b56SCornelia Huck if (!rcd_buf) { 80917283b56SCornelia Huck ret = -ENOMEM; 81017283b56SCornelia Huck goto out_error; 81117283b56SCornelia Huck } 8124abb08c2SStefan Weinhuber 8134abb08c2SStefan Weinhuber /* 8144abb08c2SStefan Weinhuber * buffer has to start with EBCDIC "V1.0" to show 8154abb08c2SStefan Weinhuber * support for virtual device SNEQ 8164abb08c2SStefan Weinhuber */ 8174abb08c2SStefan Weinhuber rcd_buf[0] = 0xE5; 8184abb08c2SStefan Weinhuber rcd_buf[1] = 0xF1; 8194abb08c2SStefan Weinhuber rcd_buf[2] = 0x4B; 8204abb08c2SStefan Weinhuber rcd_buf[3] = 0xF0; 82117283b56SCornelia Huck cqr = dasd_eckd_build_rcd_lpm(device, rcd_buf, ciw, lpm); 82217283b56SCornelia Huck if (IS_ERR(cqr)) { 82317283b56SCornelia Huck ret = PTR_ERR(cqr); 82417283b56SCornelia Huck goto out_error; 82517283b56SCornelia Huck } 82617283b56SCornelia Huck ret = dasd_sleep_on(cqr); 82717283b56SCornelia Huck /* 82817283b56SCornelia Huck * on success we update the user input parms 82917283b56SCornelia Huck */ 8308e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 83117283b56SCornelia Huck if (ret) 83217283b56SCornelia Huck goto out_error; 83317283b56SCornelia Huck 83417283b56SCornelia Huck *rcd_buffer_size = ciw->count; 83517283b56SCornelia Huck *rcd_buffer = rcd_buf; 83617283b56SCornelia Huck return 0; 83717283b56SCornelia Huck out_error: 83817283b56SCornelia Huck kfree(rcd_buf); 83917283b56SCornelia Huck *rcd_buffer = NULL; 84017283b56SCornelia Huck *rcd_buffer_size = 0; 84117283b56SCornelia Huck return ret; 84217283b56SCornelia Huck } 84317283b56SCornelia Huck 8444abb08c2SStefan Weinhuber static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private) 8454abb08c2SStefan Weinhuber { 8464abb08c2SStefan Weinhuber 8474abb08c2SStefan Weinhuber struct dasd_sneq *sneq; 8484abb08c2SStefan Weinhuber int i, count; 8494abb08c2SStefan Weinhuber 8504abb08c2SStefan Weinhuber private->ned = NULL; 8514abb08c2SStefan Weinhuber private->sneq = NULL; 8524abb08c2SStefan Weinhuber private->vdsneq = NULL; 8534abb08c2SStefan Weinhuber private->gneq = NULL; 8544abb08c2SStefan Weinhuber count = private->conf_len / sizeof(struct dasd_sneq); 8554abb08c2SStefan Weinhuber sneq = (struct dasd_sneq *)private->conf_data; 8564abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 8574abb08c2SStefan Weinhuber if (sneq->flags.identifier == 1 && sneq->format == 1) 8584abb08c2SStefan Weinhuber private->sneq = sneq; 8594abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 1 && sneq->format == 4) 8604abb08c2SStefan Weinhuber private->vdsneq = (struct vd_sneq *)sneq; 8614abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 2) 8624abb08c2SStefan Weinhuber private->gneq = (struct dasd_gneq *)sneq; 8634abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 3 && sneq->res1 == 1) 8644abb08c2SStefan Weinhuber private->ned = (struct dasd_ned *)sneq; 8654abb08c2SStefan Weinhuber sneq++; 8664abb08c2SStefan Weinhuber } 8674abb08c2SStefan Weinhuber if (!private->ned || !private->gneq) { 8684abb08c2SStefan Weinhuber private->ned = NULL; 8694abb08c2SStefan Weinhuber private->sneq = NULL; 8704abb08c2SStefan Weinhuber private->vdsneq = NULL; 8714abb08c2SStefan Weinhuber private->gneq = NULL; 8724abb08c2SStefan Weinhuber return -EINVAL; 8734abb08c2SStefan Weinhuber } 8744abb08c2SStefan Weinhuber return 0; 8754abb08c2SStefan Weinhuber 8764abb08c2SStefan Weinhuber }; 8774abb08c2SStefan Weinhuber 8784abb08c2SStefan Weinhuber static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len) 8794abb08c2SStefan Weinhuber { 8804abb08c2SStefan Weinhuber struct dasd_gneq *gneq; 8814abb08c2SStefan Weinhuber int i, count, found; 8824abb08c2SStefan Weinhuber 8834abb08c2SStefan Weinhuber count = conf_len / sizeof(*gneq); 8844abb08c2SStefan Weinhuber gneq = (struct dasd_gneq *)conf_data; 8854abb08c2SStefan Weinhuber found = 0; 8864abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 8874abb08c2SStefan Weinhuber if (gneq->flags.identifier == 2) { 8884abb08c2SStefan Weinhuber found = 1; 8894abb08c2SStefan Weinhuber break; 8904abb08c2SStefan Weinhuber } 8914abb08c2SStefan Weinhuber gneq++; 8924abb08c2SStefan Weinhuber } 8934abb08c2SStefan Weinhuber if (found) 8944abb08c2SStefan Weinhuber return ((char *)gneq)[18] & 0x07; 8954abb08c2SStefan Weinhuber else 8964abb08c2SStefan Weinhuber return 0; 8974abb08c2SStefan Weinhuber } 8984abb08c2SStefan Weinhuber 8994abb08c2SStefan Weinhuber static int dasd_eckd_read_conf(struct dasd_device *device) 9001da177e4SLinus Torvalds { 9011da177e4SLinus Torvalds void *conf_data; 9021da177e4SLinus Torvalds int conf_len, conf_data_saved; 9031da177e4SLinus Torvalds int rc; 9041da177e4SLinus Torvalds __u8 lpm; 9051da177e4SLinus Torvalds struct dasd_eckd_private *private; 9061da177e4SLinus Torvalds struct dasd_eckd_path *path_data; 9071da177e4SLinus Torvalds 9081da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 9091da177e4SLinus Torvalds path_data = (struct dasd_eckd_path *) &private->path_data; 9101da177e4SLinus Torvalds path_data->opm = ccw_device_get_path_mask(device->cdev); 9111da177e4SLinus Torvalds lpm = 0x80; 9121da177e4SLinus Torvalds conf_data_saved = 0; 9131da177e4SLinus Torvalds /* get configuration data per operational path */ 9141da177e4SLinus Torvalds for (lpm = 0x80; lpm; lpm>>= 1) { 9151da177e4SLinus Torvalds if (lpm & path_data->opm){ 91617283b56SCornelia Huck rc = dasd_eckd_read_conf_lpm(device, &conf_data, 9171da177e4SLinus Torvalds &conf_len, lpm); 9181da177e4SLinus Torvalds if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ 919b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 9201da177e4SLinus Torvalds "Read configuration data returned " 921b8ed5dd5SStefan Haberland "error %d", rc); 9221da177e4SLinus Torvalds return rc; 9231da177e4SLinus Torvalds } 9241da177e4SLinus Torvalds if (conf_data == NULL) { 925b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 926b8ed5dd5SStefan Haberland "No configuration data " 927b8ed5dd5SStefan Haberland "retrieved"); 928d133a960SGabriel Craciunescu continue; /* no error */ 9291da177e4SLinus Torvalds } 9301da177e4SLinus Torvalds /* save first valid configuration data */ 9311da177e4SLinus Torvalds if (!conf_data_saved) { 9324abb08c2SStefan Weinhuber kfree(private->conf_data); 9334abb08c2SStefan Weinhuber private->conf_data = conf_data; 9344abb08c2SStefan Weinhuber private->conf_len = conf_len; 9354abb08c2SStefan Weinhuber if (dasd_eckd_identify_conf_parts(private)) { 9364abb08c2SStefan Weinhuber private->conf_data = NULL; 9374abb08c2SStefan Weinhuber private->conf_len = 0; 9384abb08c2SStefan Weinhuber kfree(conf_data); 9394abb08c2SStefan Weinhuber continue; 9404abb08c2SStefan Weinhuber } 9411da177e4SLinus Torvalds conf_data_saved++; 9421da177e4SLinus Torvalds } 9434abb08c2SStefan Weinhuber switch (dasd_eckd_path_access(conf_data, conf_len)) { 9441da177e4SLinus Torvalds case 0x02: 9451da177e4SLinus Torvalds path_data->npm |= lpm; 9461da177e4SLinus Torvalds break; 9471da177e4SLinus Torvalds case 0x03: 9481da177e4SLinus Torvalds path_data->ppm |= lpm; 9491da177e4SLinus Torvalds break; 9501da177e4SLinus Torvalds } 9514abb08c2SStefan Weinhuber if (conf_data != private->conf_data) 9521da177e4SLinus Torvalds kfree(conf_data); 9531da177e4SLinus Torvalds } 9541da177e4SLinus Torvalds } 9551da177e4SLinus Torvalds return 0; 9561da177e4SLinus Torvalds } 9571da177e4SLinus Torvalds 9588e09f215SStefan Weinhuber static int dasd_eckd_read_features(struct dasd_device *device) 9598e09f215SStefan Weinhuber { 9608e09f215SStefan Weinhuber struct dasd_psf_prssd_data *prssdp; 9618e09f215SStefan Weinhuber struct dasd_rssd_features *features; 9628e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 9638e09f215SStefan Weinhuber struct ccw1 *ccw; 9648e09f215SStefan Weinhuber int rc; 9658e09f215SStefan Weinhuber struct dasd_eckd_private *private; 9668e09f215SStefan Weinhuber 9678e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 96868d1e5f0SStefan Weinhuber memset(&private->features, 0, sizeof(struct dasd_rssd_features)); 96968b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 9708e09f215SStefan Weinhuber (sizeof(struct dasd_psf_prssd_data) + 9718e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)), 9728e09f215SStefan Weinhuber device); 9738e09f215SStefan Weinhuber if (IS_ERR(cqr)) { 974b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " 975b8ed5dd5SStefan Haberland "allocate initialization request"); 9768e09f215SStefan Weinhuber return PTR_ERR(cqr); 9778e09f215SStefan Weinhuber } 9788e09f215SStefan Weinhuber cqr->startdev = device; 9798e09f215SStefan Weinhuber cqr->memdev = device; 9808e09f215SStefan Weinhuber cqr->block = NULL; 981eb6e199bSStefan Weinhuber cqr->retries = 256; 9828e09f215SStefan Weinhuber cqr->expires = 10 * HZ; 9838e09f215SStefan Weinhuber 9848e09f215SStefan Weinhuber /* Prepare for Read Subsystem Data */ 9858e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 9868e09f215SStefan Weinhuber memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 9878e09f215SStefan Weinhuber prssdp->order = PSF_ORDER_PRSSD; 9888e09f215SStefan Weinhuber prssdp->suborder = 0x41; /* Read Feature Codes */ 9898e09f215SStefan Weinhuber /* all other bytes of prssdp must be zero */ 9908e09f215SStefan Weinhuber 9918e09f215SStefan Weinhuber ccw = cqr->cpaddr; 9928e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PSF; 9938e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_psf_prssd_data); 9948e09f215SStefan Weinhuber ccw->flags |= CCW_FLAG_CC; 9958e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) prssdp; 9968e09f215SStefan Weinhuber 9978e09f215SStefan Weinhuber /* Read Subsystem Data - feature codes */ 9988e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 9998e09f215SStefan Weinhuber memset(features, 0, sizeof(struct dasd_rssd_features)); 10008e09f215SStefan Weinhuber 10018e09f215SStefan Weinhuber ccw++; 10028e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RSSD; 10038e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_rssd_features); 10048e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) features; 10058e09f215SStefan Weinhuber 10068e09f215SStefan Weinhuber cqr->buildclk = get_clock(); 10078e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 10088e09f215SStefan Weinhuber rc = dasd_sleep_on(cqr); 10098e09f215SStefan Weinhuber if (rc == 0) { 10108e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 10118e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 10128e09f215SStefan Weinhuber memcpy(&private->features, features, 10138e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)); 101468d1e5f0SStefan Weinhuber } else 101568d1e5f0SStefan Weinhuber dev_warn(&device->cdev->dev, "Reading device feature codes" 101668d1e5f0SStefan Weinhuber " failed with rc=%d\n", rc); 10178e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 10188e09f215SStefan Weinhuber return rc; 10198e09f215SStefan Weinhuber } 10208e09f215SStefan Weinhuber 10218e09f215SStefan Weinhuber 10223d052595SHorst Hummel /* 102340545573SHorst Hummel * Build CP for Perform Subsystem Function - SSC. 102440545573SHorst Hummel */ 1025f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, 1026f3eb5384SStefan Weinhuber int enable_pav) 102740545573SHorst Hummel { 102840545573SHorst Hummel struct dasd_ccw_req *cqr; 102940545573SHorst Hummel struct dasd_psf_ssc_data *psf_ssc_data; 103040545573SHorst Hummel struct ccw1 *ccw; 103140545573SHorst Hummel 103268b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 103340545573SHorst Hummel sizeof(struct dasd_psf_ssc_data), 103440545573SHorst Hummel device); 103540545573SHorst Hummel 103640545573SHorst Hummel if (IS_ERR(cqr)) { 1037fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 103840545573SHorst Hummel "Could not allocate PSF-SSC request"); 103940545573SHorst Hummel return cqr; 104040545573SHorst Hummel } 104140545573SHorst Hummel psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 104240545573SHorst Hummel psf_ssc_data->order = PSF_ORDER_SSC; 1043626350b6SStefan Weinhuber psf_ssc_data->suborder = 0xc0; 1044f3eb5384SStefan Weinhuber if (enable_pav) { 1045626350b6SStefan Weinhuber psf_ssc_data->suborder |= 0x08; 10468e09f215SStefan Weinhuber psf_ssc_data->reserved[0] = 0x88; 1047f3eb5384SStefan Weinhuber } 104840545573SHorst Hummel ccw = cqr->cpaddr; 104940545573SHorst Hummel ccw->cmd_code = DASD_ECKD_CCW_PSF; 105040545573SHorst Hummel ccw->cda = (__u32)(addr_t)psf_ssc_data; 105140545573SHorst Hummel ccw->count = 66; 105240545573SHorst Hummel 10538e09f215SStefan Weinhuber cqr->startdev = device; 10548e09f215SStefan Weinhuber cqr->memdev = device; 10558e09f215SStefan Weinhuber cqr->block = NULL; 1056eb6e199bSStefan Weinhuber cqr->retries = 256; 105740545573SHorst Hummel cqr->expires = 10*HZ; 105840545573SHorst Hummel cqr->buildclk = get_clock(); 105940545573SHorst Hummel cqr->status = DASD_CQR_FILLED; 106040545573SHorst Hummel return cqr; 106140545573SHorst Hummel } 106240545573SHorst Hummel 106340545573SHorst Hummel /* 106440545573SHorst Hummel * Perform Subsystem Function. 106540545573SHorst Hummel * It is necessary to trigger CIO for channel revalidation since this 106640545573SHorst Hummel * call might change behaviour of DASD devices. 106740545573SHorst Hummel */ 106840545573SHorst Hummel static int 1069f3eb5384SStefan Weinhuber dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav) 107040545573SHorst Hummel { 107140545573SHorst Hummel struct dasd_ccw_req *cqr; 107240545573SHorst Hummel int rc; 107340545573SHorst Hummel 1074f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_psf_ssc(device, enable_pav); 107540545573SHorst Hummel if (IS_ERR(cqr)) 107640545573SHorst Hummel return PTR_ERR(cqr); 107740545573SHorst Hummel 107840545573SHorst Hummel rc = dasd_sleep_on(cqr); 107940545573SHorst Hummel if (!rc) 108040545573SHorst Hummel /* trigger CIO to reprobe devices */ 108140545573SHorst Hummel css_schedule_reprobe(); 10828e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 108340545573SHorst Hummel return rc; 108440545573SHorst Hummel } 108540545573SHorst Hummel 108640545573SHorst Hummel /* 108740545573SHorst Hummel * Valide storage server of current device. 108840545573SHorst Hummel */ 1089f4ac1d02SStefan Weinhuber static void dasd_eckd_validate_server(struct dasd_device *device) 109040545573SHorst Hummel { 109140545573SHorst Hummel int rc; 10928e09f215SStefan Weinhuber struct dasd_eckd_private *private; 1093f3eb5384SStefan Weinhuber int enable_pav; 109440545573SHorst Hummel 109540545573SHorst Hummel if (dasd_nopav || MACHINE_IS_VM) 1096f3eb5384SStefan Weinhuber enable_pav = 0; 1097f3eb5384SStefan Weinhuber else 1098f3eb5384SStefan Weinhuber enable_pav = 1; 1099f3eb5384SStefan Weinhuber rc = dasd_eckd_psf_ssc(device, enable_pav); 1100eb6e199bSStefan Weinhuber 110140545573SHorst Hummel /* may be requested feature is not available on server, 110240545573SHorst Hummel * therefore just report error and go ahead */ 11038e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 1104b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " 1105b8ed5dd5SStefan Haberland "returned rc=%d", private->uid.ssid, rc); 110640545573SHorst Hummel } 110740545573SHorst Hummel 1108ef19298bSStefan Weinhuber static u32 get_fcx_max_data(struct dasd_device *device) 1109ef19298bSStefan Weinhuber { 1110ef19298bSStefan Weinhuber #if defined(CONFIG_64BIT) 1111ef19298bSStefan Weinhuber int tpm, mdc; 1112ef19298bSStefan Weinhuber int fcx_in_css, fcx_in_gneq, fcx_in_features; 1113ef19298bSStefan Weinhuber struct dasd_eckd_private *private; 1114ef19298bSStefan Weinhuber 1115ef19298bSStefan Weinhuber if (dasd_nofcx) 1116ef19298bSStefan Weinhuber return 0; 1117ef19298bSStefan Weinhuber /* is transport mode supported? */ 1118ef19298bSStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 1119ef19298bSStefan Weinhuber fcx_in_css = css_general_characteristics.fcx; 1120ef19298bSStefan Weinhuber fcx_in_gneq = private->gneq->reserved2[7] & 0x04; 1121ef19298bSStefan Weinhuber fcx_in_features = private->features.feature[40] & 0x80; 1122ef19298bSStefan Weinhuber tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; 1123ef19298bSStefan Weinhuber 1124ef19298bSStefan Weinhuber if (!tpm) 1125ef19298bSStefan Weinhuber return 0; 1126ef19298bSStefan Weinhuber 1127ef19298bSStefan Weinhuber mdc = ccw_device_get_mdc(device->cdev, 0); 1128ef19298bSStefan Weinhuber if (mdc < 0) { 1129ef19298bSStefan Weinhuber dev_warn(&device->cdev->dev, "Detecting the maximum supported" 1130ef19298bSStefan Weinhuber " data size for zHPF requests failed\n"); 1131ef19298bSStefan Weinhuber return 0; 1132ef19298bSStefan Weinhuber } else 1133ef19298bSStefan Weinhuber return mdc * FCX_MAX_DATA_FACTOR; 1134ef19298bSStefan Weinhuber #else 1135ef19298bSStefan Weinhuber return 0; 1136ef19298bSStefan Weinhuber #endif 1137ef19298bSStefan Weinhuber } 1138ef19298bSStefan Weinhuber 113940545573SHorst Hummel /* 11403d052595SHorst Hummel * Check device characteristics. 11413d052595SHorst Hummel * If the device is accessible using ECKD discipline, the device is enabled. 11423d052595SHorst Hummel */ 11431da177e4SLinus Torvalds static int 11441da177e4SLinus Torvalds dasd_eckd_check_characteristics(struct dasd_device *device) 11451da177e4SLinus Torvalds { 11461da177e4SLinus Torvalds struct dasd_eckd_private *private; 11478e09f215SStefan Weinhuber struct dasd_block *block; 11482dedf0d9SStefan Haberland struct dasd_uid temp_uid; 11497c8faa86SStefan Haberland int is_known, rc, i; 115033b62a30SStefan Weinhuber int readonly; 11517c8faa86SStefan Haberland unsigned long value; 11521da177e4SLinus Torvalds 1153454e1fa1SPeter Oberparleiter if (!ccw_device_is_pathgroup(device->cdev)) { 1154454e1fa1SPeter Oberparleiter dev_warn(&device->cdev->dev, 1155454e1fa1SPeter Oberparleiter "A channel path group could not be established\n"); 1156454e1fa1SPeter Oberparleiter return -EIO; 1157454e1fa1SPeter Oberparleiter } 1158454e1fa1SPeter Oberparleiter if (!ccw_device_is_multipath(device->cdev)) { 1159454e1fa1SPeter Oberparleiter dev_info(&device->cdev->dev, 1160454e1fa1SPeter Oberparleiter "The DASD is not operating in multipath mode\n"); 1161454e1fa1SPeter Oberparleiter } 11621da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 116392636b15SSebastian Ott if (!private) { 116492636b15SSebastian Ott private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); 116592636b15SSebastian Ott if (!private) { 1166fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1167fc19f381SStefan Haberland "Allocating memory for private DASD data " 1168fc19f381SStefan Haberland "failed\n"); 11691da177e4SLinus Torvalds return -ENOMEM; 11701da177e4SLinus Torvalds } 11711da177e4SLinus Torvalds device->private = (void *) private; 117292636b15SSebastian Ott } else { 117392636b15SSebastian Ott memset(private, 0, sizeof(*private)); 11741da177e4SLinus Torvalds } 11751da177e4SLinus Torvalds /* Invalidate status of initial analysis. */ 11761da177e4SLinus Torvalds private->init_cqr_status = -1; 11771da177e4SLinus Torvalds /* Set default cache operations. */ 11781da177e4SLinus Torvalds private->attrib.operation = DASD_NORMAL_CACHE; 11791da177e4SLinus Torvalds private->attrib.nr_cyl = 0; 11801da177e4SLinus Torvalds 118140545573SHorst Hummel /* Read Configuration Data */ 118240545573SHorst Hummel rc = dasd_eckd_read_conf(device); 118340545573SHorst Hummel if (rc) 11848e09f215SStefan Weinhuber goto out_err1; 118540545573SHorst Hummel 11867c8faa86SStefan Haberland /* set default timeout */ 11877c8faa86SStefan Haberland device->default_expires = DASD_EXPIRES; 11887c8faa86SStefan Haberland if (private->gneq) { 11897c8faa86SStefan Haberland value = 1; 11907c8faa86SStefan Haberland for (i = 0; i < private->gneq->timeout.value; i++) 11917c8faa86SStefan Haberland value = 10 * value; 11927c8faa86SStefan Haberland value = value * private->gneq->timeout.number; 11937c8faa86SStefan Haberland /* do not accept useless values */ 11947c8faa86SStefan Haberland if (value != 0 && value <= DASD_EXPIRES_MAX) 11957c8faa86SStefan Haberland device->default_expires = value; 11967c8faa86SStefan Haberland } 11977c8faa86SStefan Haberland 11982dedf0d9SStefan Haberland /* Generate device unique id */ 11992dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 120040545573SHorst Hummel if (rc) 12018e09f215SStefan Weinhuber goto out_err1; 12028e09f215SStefan Weinhuber 12032dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 12042dedf0d9SStefan Haberland if (temp_uid.type == UA_BASE_DEVICE) { 12058e09f215SStefan Weinhuber block = dasd_alloc_block(); 12068e09f215SStefan Weinhuber if (IS_ERR(block)) { 1207b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1208b8ed5dd5SStefan Haberland "could not allocate dasd " 1209b8ed5dd5SStefan Haberland "block structure"); 12108e09f215SStefan Weinhuber rc = PTR_ERR(block); 12118e09f215SStefan Weinhuber goto out_err1; 12128e09f215SStefan Weinhuber } 12138e09f215SStefan Weinhuber device->block = block; 12148e09f215SStefan Weinhuber block->base = device; 12158e09f215SStefan Weinhuber } 12168e09f215SStefan Weinhuber 12178e09f215SStefan Weinhuber /* register lcu with alias handling, enable PAV if this is a new lcu */ 12188e09f215SStefan Weinhuber is_known = dasd_alias_make_device_known_to_lcu(device); 12198e09f215SStefan Weinhuber if (is_known < 0) { 12208e09f215SStefan Weinhuber rc = is_known; 12218e09f215SStefan Weinhuber goto out_err2; 12228e09f215SStefan Weinhuber } 1223f4ac1d02SStefan Weinhuber /* 1224817f2c84SNikanth Karthikesan * dasd_eckd_validate_server is done on the first device that 1225f4ac1d02SStefan Weinhuber * is found for an LCU. All later other devices have to wait 1226f4ac1d02SStefan Weinhuber * for it, so they will read the correct feature codes. 1227f4ac1d02SStefan Weinhuber */ 12288e09f215SStefan Weinhuber if (!is_known) { 1229f4ac1d02SStefan Weinhuber dasd_eckd_validate_server(device); 1230f4ac1d02SStefan Weinhuber dasd_alias_lcu_setup_complete(device); 1231f4ac1d02SStefan Weinhuber } else 1232f4ac1d02SStefan Weinhuber dasd_alias_wait_for_lcu_setup(device); 1233f4ac1d02SStefan Weinhuber 1234f4ac1d02SStefan Weinhuber /* device may report different configuration data after LCU setup */ 1235f4ac1d02SStefan Weinhuber rc = dasd_eckd_read_conf(device); 123640545573SHorst Hummel if (rc) 12378e09f215SStefan Weinhuber goto out_err3; 12388e09f215SStefan Weinhuber 12398e09f215SStefan Weinhuber /* Read Feature Codes */ 124068d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 124140545573SHorst Hummel 12421da177e4SLinus Torvalds /* Read Device Characteristics */ 124368b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 124468b781feSStefan Haberland &private->rdc_data, 64); 12458e09f215SStefan Weinhuber if (rc) { 1246b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1247b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 12488e09f215SStefan Weinhuber goto out_err3; 12498e09f215SStefan Weinhuber } 1250817f2c84SNikanth Karthikesan /* find the valid cylinder size */ 1251b44b0ab3SStefan Weinhuber if (private->rdc_data.no_cyl == LV_COMPAT_CYL && 1252b44b0ab3SStefan Weinhuber private->rdc_data.long_no_cyl) 1253b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.long_no_cyl; 1254b44b0ab3SStefan Weinhuber else 1255b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.no_cyl; 1256b44b0ab3SStefan Weinhuber 1257ef19298bSStefan Weinhuber private->fcx_max_data = get_fcx_max_data(device); 1258ef19298bSStefan Weinhuber 125933b62a30SStefan Weinhuber readonly = dasd_device_is_ro(device); 126033b62a30SStefan Weinhuber if (readonly) 126133b62a30SStefan Weinhuber set_bit(DASD_FLAG_DEVICE_RO, &device->flags); 126233b62a30SStefan Weinhuber 1263fc19f381SStefan Haberland dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " 126433b62a30SStefan Weinhuber "with %d cylinders, %d heads, %d sectors%s\n", 12651da177e4SLinus Torvalds private->rdc_data.dev_type, 12661da177e4SLinus Torvalds private->rdc_data.dev_model, 12671da177e4SLinus Torvalds private->rdc_data.cu_type, 12681da177e4SLinus Torvalds private->rdc_data.cu_model.model, 1269b44b0ab3SStefan Weinhuber private->real_cyl, 12701da177e4SLinus Torvalds private->rdc_data.trk_per_cyl, 127133b62a30SStefan Weinhuber private->rdc_data.sec_per_trk, 127233b62a30SStefan Weinhuber readonly ? ", read-only device" : ""); 12738e09f215SStefan Weinhuber return 0; 12748e09f215SStefan Weinhuber 12758e09f215SStefan Weinhuber out_err3: 12768e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 12778e09f215SStefan Weinhuber out_err2: 12788e09f215SStefan Weinhuber dasd_free_block(device->block); 12798e09f215SStefan Weinhuber device->block = NULL; 12808e09f215SStefan Weinhuber out_err1: 12814abb08c2SStefan Weinhuber kfree(private->conf_data); 12828e09f215SStefan Weinhuber kfree(device->private); 12838e09f215SStefan Weinhuber device->private = NULL; 12843d052595SHorst Hummel return rc; 12851da177e4SLinus Torvalds } 12861da177e4SLinus Torvalds 12878e09f215SStefan Weinhuber static void dasd_eckd_uncheck_device(struct dasd_device *device) 12888e09f215SStefan Weinhuber { 12894abb08c2SStefan Weinhuber struct dasd_eckd_private *private; 12904abb08c2SStefan Weinhuber 12914abb08c2SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 12928e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 12934abb08c2SStefan Weinhuber private->ned = NULL; 12944abb08c2SStefan Weinhuber private->sneq = NULL; 12954abb08c2SStefan Weinhuber private->vdsneq = NULL; 12964abb08c2SStefan Weinhuber private->gneq = NULL; 12974abb08c2SStefan Weinhuber private->conf_len = 0; 12984abb08c2SStefan Weinhuber kfree(private->conf_data); 12994abb08c2SStefan Weinhuber private->conf_data = NULL; 13008e09f215SStefan Weinhuber } 13018e09f215SStefan Weinhuber 13021da177e4SLinus Torvalds static struct dasd_ccw_req * 13031da177e4SLinus Torvalds dasd_eckd_analysis_ccw(struct dasd_device *device) 13041da177e4SLinus Torvalds { 13051da177e4SLinus Torvalds struct dasd_eckd_private *private; 13061da177e4SLinus Torvalds struct eckd_count *count_data; 13071da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 13081da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 13091da177e4SLinus Torvalds struct ccw1 *ccw; 13101da177e4SLinus Torvalds int cplength, datasize; 13111da177e4SLinus Torvalds int i; 13121da177e4SLinus Torvalds 13131da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 13141da177e4SLinus Torvalds 13151da177e4SLinus Torvalds cplength = 8; 13161da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 131768b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 13181da177e4SLinus Torvalds if (IS_ERR(cqr)) 13191da177e4SLinus Torvalds return cqr; 13201da177e4SLinus Torvalds ccw = cqr->cpaddr; 13211da177e4SLinus Torvalds /* Define extent for the first 3 tracks. */ 13221da177e4SLinus Torvalds define_extent(ccw++, cqr->data, 0, 2, 13231da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device); 13241da177e4SLinus Torvalds LO_data = cqr->data + sizeof(struct DE_eckd_data); 13251da177e4SLinus Torvalds /* Locate record for the first 4 records on track 0. */ 13261da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 13271da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 0, 0, 4, 13281da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 13291da177e4SLinus Torvalds 13301da177e4SLinus Torvalds count_data = private->count_area; 13311da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 13321da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 13331da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 13341da177e4SLinus Torvalds ccw->flags = 0; 13351da177e4SLinus Torvalds ccw->count = 8; 13361da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 13371da177e4SLinus Torvalds ccw++; 13381da177e4SLinus Torvalds count_data++; 13391da177e4SLinus Torvalds } 13401da177e4SLinus Torvalds 13411da177e4SLinus Torvalds /* Locate record for the first record on track 2. */ 13421da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 13431da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 2, 0, 1, 13441da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 13451da177e4SLinus Torvalds /* Read count ccw. */ 13461da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 13471da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 13481da177e4SLinus Torvalds ccw->flags = 0; 13491da177e4SLinus Torvalds ccw->count = 8; 13501da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 13511da177e4SLinus Torvalds 13528e09f215SStefan Weinhuber cqr->block = NULL; 13538e09f215SStefan Weinhuber cqr->startdev = device; 13548e09f215SStefan Weinhuber cqr->memdev = device; 1355eb6e199bSStefan Weinhuber cqr->retries = 255; 13561da177e4SLinus Torvalds cqr->buildclk = get_clock(); 13571da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 13581da177e4SLinus Torvalds return cqr; 13591da177e4SLinus Torvalds } 13601da177e4SLinus Torvalds 1361eb6e199bSStefan Weinhuber /* differentiate between 'no record found' and any other error */ 1362eb6e199bSStefan Weinhuber static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) 1363eb6e199bSStefan Weinhuber { 1364eb6e199bSStefan Weinhuber char *sense; 1365eb6e199bSStefan Weinhuber if (init_cqr->status == DASD_CQR_DONE) 1366eb6e199bSStefan Weinhuber return INIT_CQR_OK; 1367eb6e199bSStefan Weinhuber else if (init_cqr->status == DASD_CQR_NEED_ERP || 1368eb6e199bSStefan Weinhuber init_cqr->status == DASD_CQR_FAILED) { 1369eb6e199bSStefan Weinhuber sense = dasd_get_sense(&init_cqr->irb); 1370eb6e199bSStefan Weinhuber if (sense && (sense[1] & SNS1_NO_REC_FOUND)) 1371eb6e199bSStefan Weinhuber return INIT_CQR_UNFORMATTED; 1372eb6e199bSStefan Weinhuber else 1373eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 1374eb6e199bSStefan Weinhuber } else 1375eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 1376eb6e199bSStefan Weinhuber } 1377eb6e199bSStefan Weinhuber 13781da177e4SLinus Torvalds /* 13791da177e4SLinus Torvalds * This is the callback function for the init_analysis cqr. It saves 13801da177e4SLinus Torvalds * the status of the initial analysis ccw before it frees it and kicks 13811da177e4SLinus Torvalds * the device to continue the startup sequence. This will call 13821da177e4SLinus Torvalds * dasd_eckd_do_analysis again (if the devices has not been marked 13831da177e4SLinus Torvalds * for deletion in the meantime). 13841da177e4SLinus Torvalds */ 1385eb6e199bSStefan Weinhuber static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, 1386eb6e199bSStefan Weinhuber void *data) 13871da177e4SLinus Torvalds { 13881da177e4SLinus Torvalds struct dasd_eckd_private *private; 13891da177e4SLinus Torvalds struct dasd_device *device; 13901da177e4SLinus Torvalds 13918e09f215SStefan Weinhuber device = init_cqr->startdev; 13921da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 1393eb6e199bSStefan Weinhuber private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); 13941da177e4SLinus Torvalds dasd_sfree_request(init_cqr, device); 13951da177e4SLinus Torvalds dasd_kick_device(device); 13961da177e4SLinus Torvalds } 13971da177e4SLinus Torvalds 1398eb6e199bSStefan Weinhuber static int dasd_eckd_start_analysis(struct dasd_block *block) 13991da177e4SLinus Torvalds { 14001da177e4SLinus Torvalds struct dasd_eckd_private *private; 14011da177e4SLinus Torvalds struct dasd_ccw_req *init_cqr; 14021da177e4SLinus Torvalds 14038e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 14048e09f215SStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(block->base); 14051da177e4SLinus Torvalds if (IS_ERR(init_cqr)) 14061da177e4SLinus Torvalds return PTR_ERR(init_cqr); 14071da177e4SLinus Torvalds init_cqr->callback = dasd_eckd_analysis_callback; 14081da177e4SLinus Torvalds init_cqr->callback_data = NULL; 14091da177e4SLinus Torvalds init_cqr->expires = 5*HZ; 1410eb6e199bSStefan Weinhuber /* first try without ERP, so we can later handle unformatted 1411eb6e199bSStefan Weinhuber * devices as special case 1412eb6e199bSStefan Weinhuber */ 1413eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); 1414eb6e199bSStefan Weinhuber init_cqr->retries = 0; 14151da177e4SLinus Torvalds dasd_add_request_head(init_cqr); 14161da177e4SLinus Torvalds return -EAGAIN; 14171da177e4SLinus Torvalds } 14181da177e4SLinus Torvalds 1419eb6e199bSStefan Weinhuber static int dasd_eckd_end_analysis(struct dasd_block *block) 14201da177e4SLinus Torvalds { 14218e09f215SStefan Weinhuber struct dasd_device *device; 14221da177e4SLinus Torvalds struct dasd_eckd_private *private; 14231da177e4SLinus Torvalds struct eckd_count *count_area; 14241da177e4SLinus Torvalds unsigned int sb, blk_per_trk; 14251da177e4SLinus Torvalds int status, i; 1426eb6e199bSStefan Weinhuber struct dasd_ccw_req *init_cqr; 14271da177e4SLinus Torvalds 14288e09f215SStefan Weinhuber device = block->base; 14291da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 14301da177e4SLinus Torvalds status = private->init_cqr_status; 14311da177e4SLinus Torvalds private->init_cqr_status = -1; 1432eb6e199bSStefan Weinhuber if (status == INIT_CQR_ERROR) { 1433eb6e199bSStefan Weinhuber /* try again, this time with full ERP */ 1434eb6e199bSStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(device); 1435eb6e199bSStefan Weinhuber dasd_sleep_on(init_cqr); 1436eb6e199bSStefan Weinhuber status = dasd_eckd_analysis_evaluation(init_cqr); 1437eb6e199bSStefan Weinhuber dasd_sfree_request(init_cqr, device); 1438eb6e199bSStefan Weinhuber } 1439eb6e199bSStefan Weinhuber 1440eb6e199bSStefan Weinhuber if (status == INIT_CQR_UNFORMATTED) { 1441eb6e199bSStefan Weinhuber dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); 14421da177e4SLinus Torvalds return -EMEDIUMTYPE; 1443eb6e199bSStefan Weinhuber } else if (status == INIT_CQR_ERROR) { 1444eb6e199bSStefan Weinhuber dev_err(&device->cdev->dev, 1445eb6e199bSStefan Weinhuber "Detecting the DASD disk layout failed because " 1446eb6e199bSStefan Weinhuber "of an I/O error\n"); 1447eb6e199bSStefan Weinhuber return -EIO; 14481da177e4SLinus Torvalds } 14491da177e4SLinus Torvalds 14501da177e4SLinus Torvalds private->uses_cdl = 1; 14511da177e4SLinus Torvalds /* Check Track 0 for Compatible Disk Layout */ 14521da177e4SLinus Torvalds count_area = NULL; 14531da177e4SLinus Torvalds for (i = 0; i < 3; i++) { 14541da177e4SLinus Torvalds if (private->count_area[i].kl != 4 || 14551da177e4SLinus Torvalds private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4) { 14561da177e4SLinus Torvalds private->uses_cdl = 0; 14571da177e4SLinus Torvalds break; 14581da177e4SLinus Torvalds } 14591da177e4SLinus Torvalds } 14601da177e4SLinus Torvalds if (i == 3) 14611da177e4SLinus Torvalds count_area = &private->count_area[4]; 14621da177e4SLinus Torvalds 14631da177e4SLinus Torvalds if (private->uses_cdl == 0) { 14641da177e4SLinus Torvalds for (i = 0; i < 5; i++) { 14651da177e4SLinus Torvalds if ((private->count_area[i].kl != 0) || 14661da177e4SLinus Torvalds (private->count_area[i].dl != 14671da177e4SLinus Torvalds private->count_area[0].dl)) 14681da177e4SLinus Torvalds break; 14691da177e4SLinus Torvalds } 14701da177e4SLinus Torvalds if (i == 5) 14711da177e4SLinus Torvalds count_area = &private->count_area[0]; 14721da177e4SLinus Torvalds } else { 14731da177e4SLinus Torvalds if (private->count_area[3].record == 1) 1474fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1475fc19f381SStefan Haberland "Track 0 has no records following the VTOC\n"); 14761da177e4SLinus Torvalds } 14771da177e4SLinus Torvalds if (count_area != NULL && count_area->kl == 0) { 14781da177e4SLinus Torvalds /* we found notthing violating our disk layout */ 14791da177e4SLinus Torvalds if (dasd_check_blocksize(count_area->dl) == 0) 14808e09f215SStefan Weinhuber block->bp_block = count_area->dl; 14811da177e4SLinus Torvalds } 14828e09f215SStefan Weinhuber if (block->bp_block == 0) { 1483fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1484fc19f381SStefan Haberland "The disk layout of the DASD is not supported\n"); 14851da177e4SLinus Torvalds return -EMEDIUMTYPE; 14861da177e4SLinus Torvalds } 14878e09f215SStefan Weinhuber block->s2b_shift = 0; /* bits to shift 512 to get a block */ 14888e09f215SStefan Weinhuber for (sb = 512; sb < block->bp_block; sb = sb << 1) 14898e09f215SStefan Weinhuber block->s2b_shift++; 14901da177e4SLinus Torvalds 14918e09f215SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 1492b44b0ab3SStefan Weinhuber block->blocks = (private->real_cyl * 14931da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 14941da177e4SLinus Torvalds blk_per_trk); 14951da177e4SLinus Torvalds 1496fc19f381SStefan Haberland dev_info(&device->cdev->dev, 1497fc19f381SStefan Haberland "DASD with %d KB/block, %d KB total size, %d KB/track, " 1498fc19f381SStefan Haberland "%s\n", (block->bp_block >> 10), 1499b44b0ab3SStefan Weinhuber ((private->real_cyl * 15001da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 15018e09f215SStefan Weinhuber blk_per_trk * (block->bp_block >> 9)) >> 1), 15028e09f215SStefan Weinhuber ((blk_per_trk * block->bp_block) >> 10), 15031da177e4SLinus Torvalds private->uses_cdl ? 15041da177e4SLinus Torvalds "compatible disk layout" : "linux disk layout"); 15051da177e4SLinus Torvalds 15061da177e4SLinus Torvalds return 0; 15071da177e4SLinus Torvalds } 15081da177e4SLinus Torvalds 15098e09f215SStefan Weinhuber static int dasd_eckd_do_analysis(struct dasd_block *block) 15101da177e4SLinus Torvalds { 15111da177e4SLinus Torvalds struct dasd_eckd_private *private; 15121da177e4SLinus Torvalds 15138e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 15141da177e4SLinus Torvalds if (private->init_cqr_status < 0) 15158e09f215SStefan Weinhuber return dasd_eckd_start_analysis(block); 15161da177e4SLinus Torvalds else 15178e09f215SStefan Weinhuber return dasd_eckd_end_analysis(block); 15181da177e4SLinus Torvalds } 15191da177e4SLinus Torvalds 15208e09f215SStefan Weinhuber static int dasd_eckd_ready_to_online(struct dasd_device *device) 15218e09f215SStefan Weinhuber { 15228e09f215SStefan Weinhuber return dasd_alias_add_device(device); 15238e09f215SStefan Weinhuber }; 15248e09f215SStefan Weinhuber 15258e09f215SStefan Weinhuber static int dasd_eckd_online_to_ready(struct dasd_device *device) 15268e09f215SStefan Weinhuber { 1527501183f2SStefan Haberland cancel_work_sync(&device->reload_device); 15288e09f215SStefan Weinhuber return dasd_alias_remove_device(device); 15298e09f215SStefan Weinhuber }; 15308e09f215SStefan Weinhuber 15311da177e4SLinus Torvalds static int 15328e09f215SStefan Weinhuber dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 15331da177e4SLinus Torvalds { 15341da177e4SLinus Torvalds struct dasd_eckd_private *private; 15351da177e4SLinus Torvalds 15368e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 15378e09f215SStefan Weinhuber if (dasd_check_blocksize(block->bp_block) == 0) { 15381da177e4SLinus Torvalds geo->sectors = recs_per_track(&private->rdc_data, 15398e09f215SStefan Weinhuber 0, block->bp_block); 15401da177e4SLinus Torvalds } 15411da177e4SLinus Torvalds geo->cylinders = private->rdc_data.no_cyl; 15421da177e4SLinus Torvalds geo->heads = private->rdc_data.trk_per_cyl; 15431da177e4SLinus Torvalds return 0; 15441da177e4SLinus Torvalds } 15451da177e4SLinus Torvalds 15461da177e4SLinus Torvalds static struct dasd_ccw_req * 15471da177e4SLinus Torvalds dasd_eckd_format_device(struct dasd_device * device, 15481da177e4SLinus Torvalds struct format_data_t * fdata) 15491da177e4SLinus Torvalds { 15501da177e4SLinus Torvalds struct dasd_eckd_private *private; 15511da177e4SLinus Torvalds struct dasd_ccw_req *fcp; 15521da177e4SLinus Torvalds struct eckd_count *ect; 15531da177e4SLinus Torvalds struct ccw1 *ccw; 15541da177e4SLinus Torvalds void *data; 1555b44b0ab3SStefan Weinhuber int rpt; 1556b44b0ab3SStefan Weinhuber struct ch_t address; 15571da177e4SLinus Torvalds int cplength, datasize; 15581da177e4SLinus Torvalds int i; 1559f9a28f7bSJean-Baptiste Joret int intensity = 0; 1560f9a28f7bSJean-Baptiste Joret int r0_perm; 15611da177e4SLinus Torvalds 15621da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 15631da177e4SLinus Torvalds rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize); 1564b44b0ab3SStefan Weinhuber set_ch_t(&address, 1565b44b0ab3SStefan Weinhuber fdata->start_unit / private->rdc_data.trk_per_cyl, 1566b44b0ab3SStefan Weinhuber fdata->start_unit % private->rdc_data.trk_per_cyl); 15671da177e4SLinus Torvalds 15681da177e4SLinus Torvalds /* Sanity checks. */ 15691da177e4SLinus Torvalds if (fdata->start_unit >= 1570b44b0ab3SStefan Weinhuber (private->real_cyl * private->rdc_data.trk_per_cyl)) { 1571fc19f381SStefan Haberland dev_warn(&device->cdev->dev, "Start track number %d used in " 1572fc19f381SStefan Haberland "formatting is too big\n", fdata->start_unit); 15731da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 15741da177e4SLinus Torvalds } 15751da177e4SLinus Torvalds if (fdata->start_unit > fdata->stop_unit) { 1576fc19f381SStefan Haberland dev_warn(&device->cdev->dev, "Start track %d used in " 1577fc19f381SStefan Haberland "formatting exceeds end track\n", fdata->start_unit); 15781da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 15791da177e4SLinus Torvalds } 15801da177e4SLinus Torvalds if (dasd_check_blocksize(fdata->blksize) != 0) { 1581fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1582fc19f381SStefan Haberland "The DASD cannot be formatted with block size %d\n", 15831da177e4SLinus Torvalds fdata->blksize); 15841da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 15851da177e4SLinus Torvalds } 15861da177e4SLinus Torvalds 15871da177e4SLinus Torvalds /* 15881da177e4SLinus Torvalds * fdata->intensity is a bit string that tells us what to do: 15891da177e4SLinus Torvalds * Bit 0: write record zero 15901da177e4SLinus Torvalds * Bit 1: write home address, currently not supported 15911da177e4SLinus Torvalds * Bit 2: invalidate tracks 15921da177e4SLinus Torvalds * Bit 3: use OS/390 compatible disk layout (cdl) 1593f9a28f7bSJean-Baptiste Joret * Bit 4: do not allow storage subsystem to modify record zero 15941da177e4SLinus Torvalds * Only some bit combinations do make sense. 15951da177e4SLinus Torvalds */ 1596f9a28f7bSJean-Baptiste Joret if (fdata->intensity & 0x10) { 1597f9a28f7bSJean-Baptiste Joret r0_perm = 0; 1598f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity & ~0x10; 1599f9a28f7bSJean-Baptiste Joret } else { 1600f9a28f7bSJean-Baptiste Joret r0_perm = 1; 1601f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity; 1602f9a28f7bSJean-Baptiste Joret } 1603f9a28f7bSJean-Baptiste Joret switch (intensity) { 16041da177e4SLinus Torvalds case 0x00: /* Normal format */ 16051da177e4SLinus Torvalds case 0x08: /* Normal format, use cdl. */ 16061da177e4SLinus Torvalds cplength = 2 + rpt; 16071da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 16081da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 16091da177e4SLinus Torvalds rpt * sizeof(struct eckd_count); 16101da177e4SLinus Torvalds break; 16111da177e4SLinus Torvalds case 0x01: /* Write record zero and format track. */ 16121da177e4SLinus Torvalds case 0x09: /* Write record zero and format track, use cdl. */ 16131da177e4SLinus Torvalds cplength = 3 + rpt; 16141da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 16151da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 16161da177e4SLinus Torvalds sizeof(struct eckd_count) + 16171da177e4SLinus Torvalds rpt * sizeof(struct eckd_count); 16181da177e4SLinus Torvalds break; 16191da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 16201da177e4SLinus Torvalds case 0x0c: /* Invalidate track, use cdl. */ 16211da177e4SLinus Torvalds cplength = 3; 16221da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 16231da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 16241da177e4SLinus Torvalds sizeof(struct eckd_count); 16251da177e4SLinus Torvalds break; 16261da177e4SLinus Torvalds default: 1627fc19f381SStefan Haberland dev_warn(&device->cdev->dev, "An I/O control call used " 1628fc19f381SStefan Haberland "incorrect flags 0x%x\n", fdata->intensity); 16291da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 16301da177e4SLinus Torvalds } 16311da177e4SLinus Torvalds /* Allocate the format ccw request. */ 163268b781feSStefan Haberland fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 16331da177e4SLinus Torvalds if (IS_ERR(fcp)) 16341da177e4SLinus Torvalds return fcp; 16351da177e4SLinus Torvalds 16361da177e4SLinus Torvalds data = fcp->data; 16371da177e4SLinus Torvalds ccw = fcp->cpaddr; 16381da177e4SLinus Torvalds 1639f9a28f7bSJean-Baptiste Joret switch (intensity & ~0x08) { 16401da177e4SLinus Torvalds case 0x00: /* Normal format. */ 16411da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 16421da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 16431da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device); 1644f9a28f7bSJean-Baptiste Joret /* grant subsystem permission to format R0 */ 1645f9a28f7bSJean-Baptiste Joret if (r0_perm) 1646f9a28f7bSJean-Baptiste Joret ((struct DE_eckd_data *)data)->ga_extended |= 0x04; 16471da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 16481da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 16491da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 16501da177e4SLinus Torvalds fdata->start_unit, 0, rpt, 16511da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device, 16521da177e4SLinus Torvalds fdata->blksize); 16531da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 16541da177e4SLinus Torvalds break; 16551da177e4SLinus Torvalds case 0x01: /* Write record zero + format track. */ 16561da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 16571da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 16581da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, 16591da177e4SLinus Torvalds device); 16601da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 16611da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 16621da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 16631da177e4SLinus Torvalds fdata->start_unit, 0, rpt + 1, 16641da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, device, 16658e09f215SStefan Weinhuber device->block->bp_block); 16661da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 16671da177e4SLinus Torvalds break; 16681da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 16691da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 16701da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 16711da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device); 16721da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 16731da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 16741da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 16751da177e4SLinus Torvalds fdata->start_unit, 0, 1, 16761da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device, 8); 16771da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 16781da177e4SLinus Torvalds break; 16791da177e4SLinus Torvalds } 1680f9a28f7bSJean-Baptiste Joret if (intensity & 0x01) { /* write record zero */ 16811da177e4SLinus Torvalds ect = (struct eckd_count *) data; 16821da177e4SLinus Torvalds data += sizeof(struct eckd_count); 1683b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 1684b44b0ab3SStefan Weinhuber ect->head = address.head; 16851da177e4SLinus Torvalds ect->record = 0; 16861da177e4SLinus Torvalds ect->kl = 0; 16871da177e4SLinus Torvalds ect->dl = 8; 16881da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 16891da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 16901da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 16911da177e4SLinus Torvalds ccw->count = 8; 16921da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 16931da177e4SLinus Torvalds ccw++; 16941da177e4SLinus Torvalds } 1695f9a28f7bSJean-Baptiste Joret if ((intensity & ~0x08) & 0x04) { /* erase track */ 16961da177e4SLinus Torvalds ect = (struct eckd_count *) data; 16971da177e4SLinus Torvalds data += sizeof(struct eckd_count); 1698b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 1699b44b0ab3SStefan Weinhuber ect->head = address.head; 17001da177e4SLinus Torvalds ect->record = 1; 17011da177e4SLinus Torvalds ect->kl = 0; 17021da177e4SLinus Torvalds ect->dl = 0; 17031da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 17041da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 17051da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 17061da177e4SLinus Torvalds ccw->count = 8; 17071da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 17081da177e4SLinus Torvalds } else { /* write remaining records */ 17091da177e4SLinus Torvalds for (i = 0; i < rpt; i++) { 17101da177e4SLinus Torvalds ect = (struct eckd_count *) data; 17111da177e4SLinus Torvalds data += sizeof(struct eckd_count); 1712b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 1713b44b0ab3SStefan Weinhuber ect->head = address.head; 17141da177e4SLinus Torvalds ect->record = i + 1; 17151da177e4SLinus Torvalds ect->kl = 0; 17161da177e4SLinus Torvalds ect->dl = fdata->blksize; 17171da177e4SLinus Torvalds /* Check for special tracks 0-1 when formatting CDL */ 1718f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 17191da177e4SLinus Torvalds fdata->start_unit == 0) { 17201da177e4SLinus Torvalds if (i < 3) { 17211da177e4SLinus Torvalds ect->kl = 4; 17221da177e4SLinus Torvalds ect->dl = sizes_trk0[i] - 4; 17231da177e4SLinus Torvalds } 17241da177e4SLinus Torvalds } 1725f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 17261da177e4SLinus Torvalds fdata->start_unit == 1) { 17271da177e4SLinus Torvalds ect->kl = 44; 17281da177e4SLinus Torvalds ect->dl = LABEL_SIZE - 44; 17291da177e4SLinus Torvalds } 17301da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 17311da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 17321da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 17331da177e4SLinus Torvalds ccw->count = 8; 17341da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 17351da177e4SLinus Torvalds ccw++; 17361da177e4SLinus Torvalds } 17371da177e4SLinus Torvalds } 17388e09f215SStefan Weinhuber fcp->startdev = device; 17398e09f215SStefan Weinhuber fcp->memdev = device; 1740eb6e199bSStefan Weinhuber fcp->retries = 256; 17411da177e4SLinus Torvalds fcp->buildclk = get_clock(); 17421da177e4SLinus Torvalds fcp->status = DASD_CQR_FILLED; 17431da177e4SLinus Torvalds return fcp; 17441da177e4SLinus Torvalds } 17451da177e4SLinus Torvalds 17468e09f215SStefan Weinhuber static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 17471da177e4SLinus Torvalds { 17488e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 17498e09f215SStefan Weinhuber if (cqr->block && (cqr->startdev != cqr->block->base)) { 17508e09f215SStefan Weinhuber dasd_eckd_reset_ccw_to_base_io(cqr); 17518e09f215SStefan Weinhuber cqr->startdev = cqr->block->base; 17521da177e4SLinus Torvalds } 17538e09f215SStefan Weinhuber }; 17541da177e4SLinus Torvalds 17551da177e4SLinus Torvalds static dasd_erp_fn_t 17561da177e4SLinus Torvalds dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 17571da177e4SLinus Torvalds { 17588e09f215SStefan Weinhuber struct dasd_device *device = (struct dasd_device *) cqr->startdev; 17591da177e4SLinus Torvalds struct ccw_device *cdev = device->cdev; 17601da177e4SLinus Torvalds 17611da177e4SLinus Torvalds switch (cdev->id.cu_type) { 17621da177e4SLinus Torvalds case 0x3990: 17631da177e4SLinus Torvalds case 0x2105: 17641da177e4SLinus Torvalds case 0x2107: 17651da177e4SLinus Torvalds case 0x1750: 17661da177e4SLinus Torvalds return dasd_3990_erp_action; 17671da177e4SLinus Torvalds case 0x9343: 17681da177e4SLinus Torvalds case 0x3880: 17691da177e4SLinus Torvalds default: 17701da177e4SLinus Torvalds return dasd_default_erp_action; 17711da177e4SLinus Torvalds } 17721da177e4SLinus Torvalds } 17731da177e4SLinus Torvalds 17741da177e4SLinus Torvalds static dasd_erp_fn_t 17751da177e4SLinus Torvalds dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 17761da177e4SLinus Torvalds { 17771da177e4SLinus Torvalds return dasd_default_erp_postaction; 17781da177e4SLinus Torvalds } 17791da177e4SLinus Torvalds 17808e09f215SStefan Weinhuber 17818e09f215SStefan Weinhuber static void dasd_eckd_handle_unsolicited_interrupt(struct dasd_device *device, 17828e09f215SStefan Weinhuber struct irb *irb) 17838e09f215SStefan Weinhuber { 17848e09f215SStefan Weinhuber char mask; 1785f3eb5384SStefan Weinhuber char *sense = NULL; 1786501183f2SStefan Haberland struct dasd_eckd_private *private; 17878e09f215SStefan Weinhuber 1788501183f2SStefan Haberland private = (struct dasd_eckd_private *) device->private; 17898e09f215SStefan Weinhuber /* first of all check for state change pending interrupt */ 17908e09f215SStefan Weinhuber mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 1791f3eb5384SStefan Weinhuber if ((scsw_dstat(&irb->scsw) & mask) == mask) { 1792501183f2SStefan Haberland /* for alias only and not in offline processing*/ 1793501183f2SStefan Haberland if (!device->block && private->lcu && 1794501183f2SStefan Haberland !test_bit(DASD_FLAG_OFFLINE, &device->flags)) { 1795501183f2SStefan Haberland /* 1796501183f2SStefan Haberland * the state change could be caused by an alias 1797501183f2SStefan Haberland * reassignment remove device from alias handling 1798501183f2SStefan Haberland * to prevent new requests from being scheduled on 1799501183f2SStefan Haberland * the wrong alias device 1800501183f2SStefan Haberland */ 1801501183f2SStefan Haberland dasd_alias_remove_device(device); 1802501183f2SStefan Haberland 1803501183f2SStefan Haberland /* schedule worker to reload device */ 1804501183f2SStefan Haberland dasd_reload_device(device); 1805501183f2SStefan Haberland } 1806501183f2SStefan Haberland 18078e09f215SStefan Weinhuber dasd_generic_handle_state_change(device); 18088e09f215SStefan Weinhuber return; 18098e09f215SStefan Weinhuber } 18108e09f215SStefan Weinhuber 18118e09f215SStefan Weinhuber /* summary unit check */ 1812a5a0061fSStefan Weinhuber sense = dasd_get_sense(irb); 1813a5a0061fSStefan Weinhuber if (sense && (sense[7] == 0x0D) && 1814a5a0061fSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { 18158e09f215SStefan Weinhuber dasd_alias_handle_summary_unit_check(device, irb); 18168e09f215SStefan Weinhuber return; 18178e09f215SStefan Weinhuber } 18188e09f215SStefan Weinhuber 1819f60c768cSStefan Haberland /* service information message SIM */ 1820f3eb5384SStefan Weinhuber if (sense && !(sense[27] & DASD_SENSE_BIT_0) && 1821f3eb5384SStefan Weinhuber ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 1822f3eb5384SStefan Weinhuber dasd_3990_erp_handle_sim(device, sense); 18239d853cafSStefan Haberland dasd_schedule_device_bh(device); 1824f60c768cSStefan Haberland return; 1825f60c768cSStefan Haberland } 1826f60c768cSStefan Haberland 1827a5a0061fSStefan Weinhuber if ((scsw_cc(&irb->scsw) == 1) && !sense && 1828a5a0061fSStefan Weinhuber (scsw_fctl(&irb->scsw) == SCSW_FCTL_START_FUNC) && 1829a5a0061fSStefan Weinhuber (scsw_actl(&irb->scsw) == SCSW_ACTL_START_PEND) && 1830a5a0061fSStefan Weinhuber (scsw_stctl(&irb->scsw) == SCSW_STCTL_STATUS_PEND)) { 1831ada3df91SStefan Haberland /* fake irb do nothing, they are handled elsewhere */ 18328e09f215SStefan Weinhuber dasd_schedule_device_bh(device); 1833ada3df91SStefan Haberland return; 1834ada3df91SStefan Haberland } 18358e09f215SStefan Weinhuber 1836ada3df91SStefan Haberland dasd_schedule_device_bh(device); 18378e09f215SStefan Weinhuber return; 18388e09f215SStefan Weinhuber }; 18398e09f215SStefan Weinhuber 1840f3eb5384SStefan Weinhuber 1841f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( 1842f3eb5384SStefan Weinhuber struct dasd_device *startdev, 18438e09f215SStefan Weinhuber struct dasd_block *block, 1844f3eb5384SStefan Weinhuber struct request *req, 1845f3eb5384SStefan Weinhuber sector_t first_rec, 1846f3eb5384SStefan Weinhuber sector_t last_rec, 1847f3eb5384SStefan Weinhuber sector_t first_trk, 1848f3eb5384SStefan Weinhuber sector_t last_trk, 1849f3eb5384SStefan Weinhuber unsigned int first_offs, 1850f3eb5384SStefan Weinhuber unsigned int last_offs, 1851f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 1852f3eb5384SStefan Weinhuber unsigned int blksize) 18531da177e4SLinus Torvalds { 18541da177e4SLinus Torvalds struct dasd_eckd_private *private; 18551da177e4SLinus Torvalds unsigned long *idaws; 18561da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 18571da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 18581da177e4SLinus Torvalds struct ccw1 *ccw; 18595705f702SNeilBrown struct req_iterator iter; 18601da177e4SLinus Torvalds struct bio_vec *bv; 18611da177e4SLinus Torvalds char *dst; 1862f3eb5384SStefan Weinhuber unsigned int off; 18631da177e4SLinus Torvalds int count, cidaw, cplength, datasize; 1864f3eb5384SStefan Weinhuber sector_t recid; 18651da177e4SLinus Torvalds unsigned char cmd, rcmd; 18668e09f215SStefan Weinhuber int use_prefix; 18678e09f215SStefan Weinhuber struct dasd_device *basedev; 18681da177e4SLinus Torvalds 18698e09f215SStefan Weinhuber basedev = block->base; 18708e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 18711da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 18721da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_READ_MT; 18731da177e4SLinus Torvalds else if (rq_data_dir(req) == WRITE) 18741da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_WRITE_MT; 18751da177e4SLinus Torvalds else 18761da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 1877f3eb5384SStefan Weinhuber 18781da177e4SLinus Torvalds /* Check struct bio and count the number of blocks for the request. */ 18791da177e4SLinus Torvalds count = 0; 18801da177e4SLinus Torvalds cidaw = 0; 18815705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 18821da177e4SLinus Torvalds if (bv->bv_len & (blksize - 1)) 18831da177e4SLinus Torvalds /* Eckd can only do full blocks. */ 18841da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 18858e09f215SStefan Weinhuber count += bv->bv_len >> (block->s2b_shift + 9); 1886347a8dc3SMartin Schwidefsky #if defined(CONFIG_64BIT) 18876c92e699SJens Axboe if (idal_is_needed (page_address(bv->bv_page), bv->bv_len)) 18888e09f215SStefan Weinhuber cidaw += bv->bv_len >> (block->s2b_shift + 9); 18891da177e4SLinus Torvalds #endif 18901da177e4SLinus Torvalds } 18911da177e4SLinus Torvalds /* Paranoia. */ 18921da177e4SLinus Torvalds if (count != last_rec - first_rec + 1) 18931da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 18948e09f215SStefan Weinhuber 18958e09f215SStefan Weinhuber /* use the prefix command if available */ 18968e09f215SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 18978e09f215SStefan Weinhuber if (use_prefix) { 18988e09f215SStefan Weinhuber /* 1x prefix + number of blocks */ 18998e09f215SStefan Weinhuber cplength = 2 + count; 19008e09f215SStefan Weinhuber /* 1x prefix + cidaws*sizeof(long) */ 19018e09f215SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 19028e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 19038e09f215SStefan Weinhuber cidaw * sizeof(unsigned long); 19048e09f215SStefan Weinhuber } else { 19051da177e4SLinus Torvalds /* 1x define extent + 1x locate record + number of blocks */ 19061da177e4SLinus Torvalds cplength = 2 + count; 19071da177e4SLinus Torvalds /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 19088e09f215SStefan Weinhuber datasize = sizeof(struct DE_eckd_data) + 19098e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 19101da177e4SLinus Torvalds cidaw * sizeof(unsigned long); 19118e09f215SStefan Weinhuber } 19121da177e4SLinus Torvalds /* Find out the number of additional locate record ccws for cdl. */ 19131da177e4SLinus Torvalds if (private->uses_cdl && first_rec < 2*blk_per_trk) { 19141da177e4SLinus Torvalds if (last_rec >= 2*blk_per_trk) 19151da177e4SLinus Torvalds count = 2*blk_per_trk - first_rec; 19161da177e4SLinus Torvalds cplength += count; 19171da177e4SLinus Torvalds datasize += count*sizeof(struct LO_eckd_data); 19181da177e4SLinus Torvalds } 19191da177e4SLinus Torvalds /* Allocate the ccw request. */ 192068b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 192168b781feSStefan Haberland startdev); 19221da177e4SLinus Torvalds if (IS_ERR(cqr)) 19231da177e4SLinus Torvalds return cqr; 19241da177e4SLinus Torvalds ccw = cqr->cpaddr; 19258e09f215SStefan Weinhuber /* First ccw is define extent or prefix. */ 19268e09f215SStefan Weinhuber if (use_prefix) { 19278e09f215SStefan Weinhuber if (prefix(ccw++, cqr->data, first_trk, 19288e09f215SStefan Weinhuber last_trk, cmd, basedev, startdev) == -EAGAIN) { 19298e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 19308e09f215SStefan Weinhuber * Try again later. 19318e09f215SStefan Weinhuber */ 19328e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 1933d54853efSMartin Schwidefsky return ERR_PTR(-EAGAIN); 1934d54853efSMartin Schwidefsky } 19358e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 19368e09f215SStefan Weinhuber sizeof(struct PFX_eckd_data)); 19378e09f215SStefan Weinhuber } else { 19388e09f215SStefan Weinhuber if (define_extent(ccw++, cqr->data, first_trk, 19398e09f215SStefan Weinhuber last_trk, cmd, startdev) == -EAGAIN) { 19408e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 19418e09f215SStefan Weinhuber * Try again later. 19428e09f215SStefan Weinhuber */ 19438e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 19448e09f215SStefan Weinhuber return ERR_PTR(-EAGAIN); 19458e09f215SStefan Weinhuber } 19468e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 19478e09f215SStefan Weinhuber sizeof(struct DE_eckd_data)); 19488e09f215SStefan Weinhuber } 19491da177e4SLinus Torvalds /* Build locate_record+read/write/ccws. */ 19501da177e4SLinus Torvalds LO_data = (struct LO_eckd_data *) (idaws + cidaw); 19511da177e4SLinus Torvalds recid = first_rec; 19521da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 19531da177e4SLinus Torvalds /* Only standard blocks so there is just one locate record. */ 19541da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 19551da177e4SLinus Torvalds locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 19568e09f215SStefan Weinhuber last_rec - recid + 1, cmd, basedev, blksize); 19571da177e4SLinus Torvalds } 19585705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 19591da177e4SLinus Torvalds dst = page_address(bv->bv_page) + bv->bv_offset; 19601da177e4SLinus Torvalds if (dasd_page_cache) { 19611da177e4SLinus Torvalds char *copy = kmem_cache_alloc(dasd_page_cache, 1962441e143eSChristoph Lameter GFP_DMA | __GFP_NOWARN); 19631da177e4SLinus Torvalds if (copy && rq_data_dir(req) == WRITE) 19641da177e4SLinus Torvalds memcpy(copy + bv->bv_offset, dst, bv->bv_len); 19651da177e4SLinus Torvalds if (copy) 19661da177e4SLinus Torvalds dst = copy + bv->bv_offset; 19671da177e4SLinus Torvalds } 19681da177e4SLinus Torvalds for (off = 0; off < bv->bv_len; off += blksize) { 19691da177e4SLinus Torvalds sector_t trkid = recid; 19701da177e4SLinus Torvalds unsigned int recoffs = sector_div(trkid, blk_per_trk); 19711da177e4SLinus Torvalds rcmd = cmd; 19721da177e4SLinus Torvalds count = blksize; 19731da177e4SLinus Torvalds /* Locate record for cdl special block ? */ 19741da177e4SLinus Torvalds if (private->uses_cdl && recid < 2*blk_per_trk) { 19751da177e4SLinus Torvalds if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 19761da177e4SLinus Torvalds rcmd |= 0x8; 19771da177e4SLinus Torvalds count = dasd_eckd_cdl_reclen(recid); 1978ec5883abSHorst Hummel if (count < blksize && 1979ec5883abSHorst Hummel rq_data_dir(req) == READ) 19801da177e4SLinus Torvalds memset(dst + count, 0xe5, 19811da177e4SLinus Torvalds blksize - count); 19821da177e4SLinus Torvalds } 19831da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 19841da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 19851da177e4SLinus Torvalds trkid, recoffs + 1, 19868e09f215SStefan Weinhuber 1, rcmd, basedev, count); 19871da177e4SLinus Torvalds } 19881da177e4SLinus Torvalds /* Locate record for standard blocks ? */ 19891da177e4SLinus Torvalds if (private->uses_cdl && recid == 2*blk_per_trk) { 19901da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 19911da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 19921da177e4SLinus Torvalds trkid, recoffs + 1, 19931da177e4SLinus Torvalds last_rec - recid + 1, 19948e09f215SStefan Weinhuber cmd, basedev, count); 19951da177e4SLinus Torvalds } 19961da177e4SLinus Torvalds /* Read/write ccw. */ 19971da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 19981da177e4SLinus Torvalds ccw->cmd_code = rcmd; 19991da177e4SLinus Torvalds ccw->count = count; 20001da177e4SLinus Torvalds if (idal_is_needed(dst, blksize)) { 20011da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) idaws; 20021da177e4SLinus Torvalds ccw->flags = CCW_FLAG_IDA; 20031da177e4SLinus Torvalds idaws = idal_create_words(idaws, dst, blksize); 20041da177e4SLinus Torvalds } else { 20051da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) dst; 20061da177e4SLinus Torvalds ccw->flags = 0; 20071da177e4SLinus Torvalds } 20081da177e4SLinus Torvalds ccw++; 20091da177e4SLinus Torvalds dst += blksize; 20101da177e4SLinus Torvalds recid++; 20111da177e4SLinus Torvalds } 20121da177e4SLinus Torvalds } 201313de227bSHolger Smolinski if (blk_noretry_request(req) || 201413de227bSHolger Smolinski block->base->features & DASD_FEATURE_FAILFAST) 20151c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 20168e09f215SStefan Weinhuber cqr->startdev = startdev; 20178e09f215SStefan Weinhuber cqr->memdev = startdev; 20188e09f215SStefan Weinhuber cqr->block = block; 20197c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 20201da177e4SLinus Torvalds cqr->lpm = private->path_data.ppm; 20211da177e4SLinus Torvalds cqr->retries = 256; 20221da177e4SLinus Torvalds cqr->buildclk = get_clock(); 20231da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 20241da177e4SLinus Torvalds return cqr; 20251da177e4SLinus Torvalds } 20261da177e4SLinus Torvalds 2027f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 2028f3eb5384SStefan Weinhuber struct dasd_device *startdev, 2029f3eb5384SStefan Weinhuber struct dasd_block *block, 2030f3eb5384SStefan Weinhuber struct request *req, 2031f3eb5384SStefan Weinhuber sector_t first_rec, 2032f3eb5384SStefan Weinhuber sector_t last_rec, 2033f3eb5384SStefan Weinhuber sector_t first_trk, 2034f3eb5384SStefan Weinhuber sector_t last_trk, 2035f3eb5384SStefan Weinhuber unsigned int first_offs, 2036f3eb5384SStefan Weinhuber unsigned int last_offs, 2037f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 2038f3eb5384SStefan Weinhuber unsigned int blksize) 2039f3eb5384SStefan Weinhuber { 2040f3eb5384SStefan Weinhuber struct dasd_eckd_private *private; 2041f3eb5384SStefan Weinhuber unsigned long *idaws; 2042f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 2043f3eb5384SStefan Weinhuber struct ccw1 *ccw; 2044f3eb5384SStefan Weinhuber struct req_iterator iter; 2045f3eb5384SStefan Weinhuber struct bio_vec *bv; 2046f3eb5384SStefan Weinhuber char *dst, *idaw_dst; 2047f3eb5384SStefan Weinhuber unsigned int cidaw, cplength, datasize; 2048f3eb5384SStefan Weinhuber unsigned int tlf; 2049f3eb5384SStefan Weinhuber sector_t recid; 2050f3eb5384SStefan Weinhuber unsigned char cmd; 2051f3eb5384SStefan Weinhuber struct dasd_device *basedev; 2052f3eb5384SStefan Weinhuber unsigned int trkcount, count, count_to_trk_end; 2053f3eb5384SStefan Weinhuber unsigned int idaw_len, seg_len, part_len, len_to_track_end; 2054f3eb5384SStefan Weinhuber unsigned char new_track, end_idaw; 2055f3eb5384SStefan Weinhuber sector_t trkid; 2056f3eb5384SStefan Weinhuber unsigned int recoffs; 2057f3eb5384SStefan Weinhuber 2058f3eb5384SStefan Weinhuber basedev = block->base; 2059f3eb5384SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 2060f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) 2061f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 2062f3eb5384SStefan Weinhuber else if (rq_data_dir(req) == WRITE) 2063f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 2064f3eb5384SStefan Weinhuber else 2065f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 2066f3eb5384SStefan Weinhuber 2067f3eb5384SStefan Weinhuber /* Track based I/O needs IDAWs for each page, and not just for 2068f3eb5384SStefan Weinhuber * 64 bit addresses. We need additional idals for pages 2069f3eb5384SStefan Weinhuber * that get filled from two tracks, so we use the number 2070f3eb5384SStefan Weinhuber * of records as upper limit. 2071f3eb5384SStefan Weinhuber */ 2072f3eb5384SStefan Weinhuber cidaw = last_rec - first_rec + 1; 2073f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 2074f3eb5384SStefan Weinhuber 2075f3eb5384SStefan Weinhuber /* 1x prefix + one read/write ccw per track */ 2076f3eb5384SStefan Weinhuber cplength = 1 + trkcount; 2077f3eb5384SStefan Weinhuber 2078f3eb5384SStefan Weinhuber /* on 31-bit we need space for two 32 bit addresses per page 2079f3eb5384SStefan Weinhuber * on 64-bit one 64 bit address 2080f3eb5384SStefan Weinhuber */ 2081f3eb5384SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 2082f3eb5384SStefan Weinhuber cidaw * sizeof(unsigned long long); 2083f3eb5384SStefan Weinhuber 2084f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 208568b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 208668b781feSStefan Haberland startdev); 2087f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 2088f3eb5384SStefan Weinhuber return cqr; 2089f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 2090f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 2091f3eb5384SStefan Weinhuber if (first_trk == last_trk) 2092f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 2093f3eb5384SStefan Weinhuber else 2094f3eb5384SStefan Weinhuber tlf = last_offs + 1; 2095f3eb5384SStefan Weinhuber tlf *= blksize; 2096f3eb5384SStefan Weinhuber 2097f3eb5384SStefan Weinhuber if (prefix_LRE(ccw++, cqr->data, first_trk, 2098f3eb5384SStefan Weinhuber last_trk, cmd, basedev, startdev, 2099f3eb5384SStefan Weinhuber 1 /* format */, first_offs + 1, 2100f3eb5384SStefan Weinhuber trkcount, blksize, 2101f3eb5384SStefan Weinhuber tlf) == -EAGAIN) { 2102f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 2103f3eb5384SStefan Weinhuber * Try again later. 2104f3eb5384SStefan Weinhuber */ 2105f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2106f3eb5384SStefan Weinhuber return ERR_PTR(-EAGAIN); 2107f3eb5384SStefan Weinhuber } 2108f3eb5384SStefan Weinhuber 2109f3eb5384SStefan Weinhuber /* 2110f3eb5384SStefan Weinhuber * The translation of request into ccw programs must meet the 2111f3eb5384SStefan Weinhuber * following conditions: 2112f3eb5384SStefan Weinhuber * - all idaws but the first and the last must address full pages 2113f3eb5384SStefan Weinhuber * (or 2K blocks on 31-bit) 2114f3eb5384SStefan Weinhuber * - the scope of a ccw and it's idal ends with the track boundaries 2115f3eb5384SStefan Weinhuber */ 2116f3eb5384SStefan Weinhuber idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); 2117f3eb5384SStefan Weinhuber recid = first_rec; 2118f3eb5384SStefan Weinhuber new_track = 1; 2119f3eb5384SStefan Weinhuber end_idaw = 0; 2120f3eb5384SStefan Weinhuber len_to_track_end = 0; 2121f3eb5384SStefan Weinhuber idaw_dst = 0; 2122f3eb5384SStefan Weinhuber idaw_len = 0; 2123f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 2124f3eb5384SStefan Weinhuber dst = page_address(bv->bv_page) + bv->bv_offset; 2125f3eb5384SStefan Weinhuber seg_len = bv->bv_len; 2126f3eb5384SStefan Weinhuber while (seg_len) { 2127f3eb5384SStefan Weinhuber if (new_track) { 2128f3eb5384SStefan Weinhuber trkid = recid; 2129f3eb5384SStefan Weinhuber recoffs = sector_div(trkid, blk_per_trk); 2130f3eb5384SStefan Weinhuber count_to_trk_end = blk_per_trk - recoffs; 2131f3eb5384SStefan Weinhuber count = min((last_rec - recid + 1), 2132f3eb5384SStefan Weinhuber (sector_t)count_to_trk_end); 2133f3eb5384SStefan Weinhuber len_to_track_end = count * blksize; 2134f3eb5384SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 2135f3eb5384SStefan Weinhuber ccw->cmd_code = cmd; 2136f3eb5384SStefan Weinhuber ccw->count = len_to_track_end; 2137f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 2138f3eb5384SStefan Weinhuber ccw->flags = CCW_FLAG_IDA; 2139f3eb5384SStefan Weinhuber ccw++; 2140f3eb5384SStefan Weinhuber recid += count; 2141f3eb5384SStefan Weinhuber new_track = 0; 214252db45c3SStefan Weinhuber /* first idaw for a ccw may start anywhere */ 214352db45c3SStefan Weinhuber if (!idaw_dst) 214452db45c3SStefan Weinhuber idaw_dst = dst; 2145f3eb5384SStefan Weinhuber } 214652db45c3SStefan Weinhuber /* If we start a new idaw, we must make sure that it 214752db45c3SStefan Weinhuber * starts on an IDA_BLOCK_SIZE boundary. 2148f3eb5384SStefan Weinhuber * If we continue an idaw, we must make sure that the 2149f3eb5384SStefan Weinhuber * current segment begins where the so far accumulated 2150f3eb5384SStefan Weinhuber * idaw ends 2151f3eb5384SStefan Weinhuber */ 215252db45c3SStefan Weinhuber if (!idaw_dst) { 215352db45c3SStefan Weinhuber if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { 215452db45c3SStefan Weinhuber dasd_sfree_request(cqr, startdev); 215552db45c3SStefan Weinhuber return ERR_PTR(-ERANGE); 215652db45c3SStefan Weinhuber } else 2157f3eb5384SStefan Weinhuber idaw_dst = dst; 215852db45c3SStefan Weinhuber } 2159f3eb5384SStefan Weinhuber if ((idaw_dst + idaw_len) != dst) { 2160f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2161f3eb5384SStefan Weinhuber return ERR_PTR(-ERANGE); 2162f3eb5384SStefan Weinhuber } 2163f3eb5384SStefan Weinhuber part_len = min(seg_len, len_to_track_end); 2164f3eb5384SStefan Weinhuber seg_len -= part_len; 2165f3eb5384SStefan Weinhuber dst += part_len; 2166f3eb5384SStefan Weinhuber idaw_len += part_len; 2167f3eb5384SStefan Weinhuber len_to_track_end -= part_len; 2168f3eb5384SStefan Weinhuber /* collected memory area ends on an IDA_BLOCK border, 2169f3eb5384SStefan Weinhuber * -> create an idaw 2170f3eb5384SStefan Weinhuber * idal_create_words will handle cases where idaw_len 2171f3eb5384SStefan Weinhuber * is larger then IDA_BLOCK_SIZE 2172f3eb5384SStefan Weinhuber */ 2173f3eb5384SStefan Weinhuber if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) 2174f3eb5384SStefan Weinhuber end_idaw = 1; 2175f3eb5384SStefan Weinhuber /* We also need to end the idaw at track end */ 2176f3eb5384SStefan Weinhuber if (!len_to_track_end) { 2177f3eb5384SStefan Weinhuber new_track = 1; 2178f3eb5384SStefan Weinhuber end_idaw = 1; 2179f3eb5384SStefan Weinhuber } 2180f3eb5384SStefan Weinhuber if (end_idaw) { 2181f3eb5384SStefan Weinhuber idaws = idal_create_words(idaws, idaw_dst, 2182f3eb5384SStefan Weinhuber idaw_len); 2183f3eb5384SStefan Weinhuber idaw_dst = 0; 2184f3eb5384SStefan Weinhuber idaw_len = 0; 2185f3eb5384SStefan Weinhuber end_idaw = 0; 2186f3eb5384SStefan Weinhuber } 2187f3eb5384SStefan Weinhuber } 2188f3eb5384SStefan Weinhuber } 2189f3eb5384SStefan Weinhuber 2190f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 2191f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 2192f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2193f3eb5384SStefan Weinhuber cqr->startdev = startdev; 2194f3eb5384SStefan Weinhuber cqr->memdev = startdev; 2195f3eb5384SStefan Weinhuber cqr->block = block; 21967c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2197f3eb5384SStefan Weinhuber cqr->lpm = private->path_data.ppm; 2198f3eb5384SStefan Weinhuber cqr->retries = 256; 2199f3eb5384SStefan Weinhuber cqr->buildclk = get_clock(); 2200f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 2201f3eb5384SStefan Weinhuber return cqr; 2202f3eb5384SStefan Weinhuber } 2203f3eb5384SStefan Weinhuber 2204f3eb5384SStefan Weinhuber static int prepare_itcw(struct itcw *itcw, 2205f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 2206f3eb5384SStefan Weinhuber struct dasd_device *basedev, 2207f3eb5384SStefan Weinhuber struct dasd_device *startdev, 2208f3eb5384SStefan Weinhuber unsigned int rec_on_trk, int count, 2209f3eb5384SStefan Weinhuber unsigned int blksize, 2210f3eb5384SStefan Weinhuber unsigned int total_data_size, 2211f3eb5384SStefan Weinhuber unsigned int tlf, 2212f3eb5384SStefan Weinhuber unsigned int blk_per_trk) 2213f3eb5384SStefan Weinhuber { 2214f3eb5384SStefan Weinhuber struct PFX_eckd_data pfxdata; 2215f3eb5384SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 2216f3eb5384SStefan Weinhuber struct DE_eckd_data *dedata; 2217f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 2218f3eb5384SStefan Weinhuber struct dcw *dcw; 2219f3eb5384SStefan Weinhuber 2220f3eb5384SStefan Weinhuber u32 begcyl, endcyl; 2221f3eb5384SStefan Weinhuber u16 heads, beghead, endhead; 2222f3eb5384SStefan Weinhuber u8 pfx_cmd; 2223f3eb5384SStefan Weinhuber 2224f3eb5384SStefan Weinhuber int rc = 0; 2225f3eb5384SStefan Weinhuber int sector = 0; 2226f3eb5384SStefan Weinhuber int dn, d; 2227f3eb5384SStefan Weinhuber 2228f3eb5384SStefan Weinhuber 2229f3eb5384SStefan Weinhuber /* setup prefix data */ 2230f3eb5384SStefan Weinhuber basepriv = (struct dasd_eckd_private *) basedev->private; 2231f3eb5384SStefan Weinhuber startpriv = (struct dasd_eckd_private *) startdev->private; 2232f3eb5384SStefan Weinhuber dedata = &pfxdata.define_extent; 2233f3eb5384SStefan Weinhuber lredata = &pfxdata.locate_record; 2234f3eb5384SStefan Weinhuber 2235f3eb5384SStefan Weinhuber memset(&pfxdata, 0, sizeof(pfxdata)); 2236f3eb5384SStefan Weinhuber pfxdata.format = 1; /* PFX with LRE */ 2237f3eb5384SStefan Weinhuber pfxdata.base_address = basepriv->ned->unit_addr; 2238f3eb5384SStefan Weinhuber pfxdata.base_lss = basepriv->ned->ID; 2239f3eb5384SStefan Weinhuber pfxdata.validity.define_extent = 1; 2240f3eb5384SStefan Weinhuber 2241f3eb5384SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 2242f3eb5384SStefan Weinhuber if (startpriv->uid.type != UA_BASE_DEVICE) { 2243f3eb5384SStefan Weinhuber pfxdata.validity.verify_base = 1; 2244f3eb5384SStefan Weinhuber if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 2245f3eb5384SStefan Weinhuber pfxdata.validity.hyper_pav = 1; 2246f3eb5384SStefan Weinhuber } 2247f3eb5384SStefan Weinhuber 2248f3eb5384SStefan Weinhuber switch (cmd) { 2249f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 2250f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 2251f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 2252f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 2253f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 2254f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 2255f3eb5384SStefan Weinhuber lredata->operation.operation = 0x0C; 2256f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x01; 2257f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX_READ; 2258f3eb5384SStefan Weinhuber break; 2259f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 2260f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 2261f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 2262f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 2263f3eb5384SStefan Weinhuber rc = check_XRC_on_prefix(&pfxdata, basedev); 2264f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 2265f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 2266f3eb5384SStefan Weinhuber lredata->operation.operation = 0x3F; 2267f3eb5384SStefan Weinhuber lredata->extended_operation = 0x23; 2268f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x2; 2269f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX; 2270f3eb5384SStefan Weinhuber break; 2271f3eb5384SStefan Weinhuber default: 2272f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 2273f3eb5384SStefan Weinhuber "prepare itcw, unknown opcode 0x%x", cmd); 2274f3eb5384SStefan Weinhuber BUG(); 2275f3eb5384SStefan Weinhuber break; 2276f3eb5384SStefan Weinhuber } 2277f3eb5384SStefan Weinhuber if (rc) 2278f3eb5384SStefan Weinhuber return rc; 2279f3eb5384SStefan Weinhuber 2280f3eb5384SStefan Weinhuber dedata->attributes.mode = 0x3; /* ECKD */ 2281f3eb5384SStefan Weinhuber 2282f3eb5384SStefan Weinhuber heads = basepriv->rdc_data.trk_per_cyl; 2283f3eb5384SStefan Weinhuber begcyl = trk / heads; 2284f3eb5384SStefan Weinhuber beghead = trk % heads; 2285f3eb5384SStefan Weinhuber endcyl = totrk / heads; 2286f3eb5384SStefan Weinhuber endhead = totrk % heads; 2287f3eb5384SStefan Weinhuber 2288f3eb5384SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 2289f3eb5384SStefan Weinhuber if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 2290f3eb5384SStefan Weinhuber dedata->attributes.operation == DASD_SEQ_ACCESS) { 2291f3eb5384SStefan Weinhuber 2292f3eb5384SStefan Weinhuber if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 2293f3eb5384SStefan Weinhuber endcyl += basepriv->attrib.nr_cyl; 2294f3eb5384SStefan Weinhuber else 2295f3eb5384SStefan Weinhuber endcyl = (basepriv->real_cyl - 1); 2296f3eb5384SStefan Weinhuber } 2297f3eb5384SStefan Weinhuber 2298f3eb5384SStefan Weinhuber set_ch_t(&dedata->beg_ext, begcyl, beghead); 2299f3eb5384SStefan Weinhuber set_ch_t(&dedata->end_ext, endcyl, endhead); 2300f3eb5384SStefan Weinhuber 2301f3eb5384SStefan Weinhuber dedata->ep_format = 0x20; /* records per track is valid */ 2302f3eb5384SStefan Weinhuber dedata->ep_rec_per_track = blk_per_trk; 2303f3eb5384SStefan Weinhuber 2304f3eb5384SStefan Weinhuber if (rec_on_trk) { 2305f3eb5384SStefan Weinhuber switch (basepriv->rdc_data.dev_type) { 2306f3eb5384SStefan Weinhuber case 0x3390: 2307f3eb5384SStefan Weinhuber dn = ceil_quot(blksize + 6, 232); 2308f3eb5384SStefan Weinhuber d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); 2309f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 2310f3eb5384SStefan Weinhuber break; 2311f3eb5384SStefan Weinhuber case 0x3380: 2312f3eb5384SStefan Weinhuber d = 7 + ceil_quot(blksize + 12, 32); 2313f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 2314f3eb5384SStefan Weinhuber break; 2315f3eb5384SStefan Weinhuber } 2316f3eb5384SStefan Weinhuber } 2317f3eb5384SStefan Weinhuber 2318f3eb5384SStefan Weinhuber lredata->auxiliary.length_valid = 1; 2319f3eb5384SStefan Weinhuber lredata->auxiliary.length_scope = 1; 2320f3eb5384SStefan Weinhuber lredata->auxiliary.imbedded_ccw_valid = 1; 2321f3eb5384SStefan Weinhuber lredata->length = tlf; 2322f3eb5384SStefan Weinhuber lredata->imbedded_ccw = cmd; 2323f3eb5384SStefan Weinhuber lredata->count = count; 2324f3eb5384SStefan Weinhuber lredata->sector = sector; 2325f3eb5384SStefan Weinhuber set_ch_t(&lredata->seek_addr, begcyl, beghead); 2326f3eb5384SStefan Weinhuber lredata->search_arg.cyl = lredata->seek_addr.cyl; 2327f3eb5384SStefan Weinhuber lredata->search_arg.head = lredata->seek_addr.head; 2328f3eb5384SStefan Weinhuber lredata->search_arg.record = rec_on_trk; 2329f3eb5384SStefan Weinhuber 2330f3eb5384SStefan Weinhuber dcw = itcw_add_dcw(itcw, pfx_cmd, 0, 2331f3eb5384SStefan Weinhuber &pfxdata, sizeof(pfxdata), total_data_size); 2332f3eb5384SStefan Weinhuber 2333f3eb5384SStefan Weinhuber return rc; 2334f3eb5384SStefan Weinhuber } 2335f3eb5384SStefan Weinhuber 2336f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 2337f3eb5384SStefan Weinhuber struct dasd_device *startdev, 2338f3eb5384SStefan Weinhuber struct dasd_block *block, 2339f3eb5384SStefan Weinhuber struct request *req, 2340f3eb5384SStefan Weinhuber sector_t first_rec, 2341f3eb5384SStefan Weinhuber sector_t last_rec, 2342f3eb5384SStefan Weinhuber sector_t first_trk, 2343f3eb5384SStefan Weinhuber sector_t last_trk, 2344f3eb5384SStefan Weinhuber unsigned int first_offs, 2345f3eb5384SStefan Weinhuber unsigned int last_offs, 2346f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 2347f3eb5384SStefan Weinhuber unsigned int blksize) 2348f3eb5384SStefan Weinhuber { 2349f3eb5384SStefan Weinhuber struct dasd_eckd_private *private; 2350f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 2351f3eb5384SStefan Weinhuber struct req_iterator iter; 2352f3eb5384SStefan Weinhuber struct bio_vec *bv; 2353f3eb5384SStefan Weinhuber char *dst; 2354f3eb5384SStefan Weinhuber unsigned int trkcount, ctidaw; 2355f3eb5384SStefan Weinhuber unsigned char cmd; 2356f3eb5384SStefan Weinhuber struct dasd_device *basedev; 2357f3eb5384SStefan Weinhuber unsigned int tlf; 2358f3eb5384SStefan Weinhuber struct itcw *itcw; 2359f3eb5384SStefan Weinhuber struct tidaw *last_tidaw = NULL; 2360f3eb5384SStefan Weinhuber int itcw_op; 2361f3eb5384SStefan Weinhuber size_t itcw_size; 2362ef19298bSStefan Weinhuber u8 tidaw_flags; 2363ef19298bSStefan Weinhuber unsigned int seg_len, part_len, len_to_track_end; 2364ef19298bSStefan Weinhuber unsigned char new_track; 2365ef19298bSStefan Weinhuber sector_t recid, trkid; 2366ef19298bSStefan Weinhuber unsigned int offs; 2367ef19298bSStefan Weinhuber unsigned int count, count_to_trk_end; 2368f3eb5384SStefan Weinhuber 2369f3eb5384SStefan Weinhuber basedev = block->base; 2370f3eb5384SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 2371f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) { 2372f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 2373f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_READ; 2374f3eb5384SStefan Weinhuber } else if (rq_data_dir(req) == WRITE) { 2375f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 2376f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_WRITE; 2377f3eb5384SStefan Weinhuber } else 2378f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 2379f3eb5384SStefan Weinhuber 2380f3eb5384SStefan Weinhuber /* trackbased I/O needs address all memory via TIDAWs, 2381f3eb5384SStefan Weinhuber * not just for 64 bit addresses. This allows us to map 2382f3eb5384SStefan Weinhuber * each segment directly to one tidaw. 2383ef19298bSStefan Weinhuber * In the case of write requests, additional tidaws may 2384ef19298bSStefan Weinhuber * be needed when a segment crosses a track boundary. 2385f3eb5384SStefan Weinhuber */ 2386f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 2387f3eb5384SStefan Weinhuber ctidaw = 0; 2388f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 2389f3eb5384SStefan Weinhuber ++ctidaw; 2390f3eb5384SStefan Weinhuber } 2391ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 2392ef19298bSStefan Weinhuber ctidaw += (last_trk - first_trk); 2393f3eb5384SStefan Weinhuber 2394f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 2395f3eb5384SStefan Weinhuber itcw_size = itcw_calc_size(0, ctidaw, 0); 239668b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 2397f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 2398f3eb5384SStefan Weinhuber return cqr; 2399f3eb5384SStefan Weinhuber 2400f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 2401f3eb5384SStefan Weinhuber if (first_trk == last_trk) 2402f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 2403f3eb5384SStefan Weinhuber else 2404f3eb5384SStefan Weinhuber tlf = last_offs + 1; 2405f3eb5384SStefan Weinhuber tlf *= blksize; 2406f3eb5384SStefan Weinhuber 2407f3eb5384SStefan Weinhuber itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); 2408ef19298bSStefan Weinhuber if (IS_ERR(itcw)) { 2409ef19298bSStefan Weinhuber dasd_sfree_request(cqr, startdev); 2410ef19298bSStefan Weinhuber return ERR_PTR(-EINVAL); 2411ef19298bSStefan Weinhuber } 2412f3eb5384SStefan Weinhuber cqr->cpaddr = itcw_get_tcw(itcw); 2413f3eb5384SStefan Weinhuber if (prepare_itcw(itcw, first_trk, last_trk, 2414f3eb5384SStefan Weinhuber cmd, basedev, startdev, 2415f3eb5384SStefan Weinhuber first_offs + 1, 2416f3eb5384SStefan Weinhuber trkcount, blksize, 2417f3eb5384SStefan Weinhuber (last_rec - first_rec + 1) * blksize, 2418f3eb5384SStefan Weinhuber tlf, blk_per_trk) == -EAGAIN) { 2419f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 2420f3eb5384SStefan Weinhuber * Try again later. 2421f3eb5384SStefan Weinhuber */ 2422f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2423f3eb5384SStefan Weinhuber return ERR_PTR(-EAGAIN); 2424f3eb5384SStefan Weinhuber } 2425f3eb5384SStefan Weinhuber /* 2426f3eb5384SStefan Weinhuber * A tidaw can address 4k of memory, but must not cross page boundaries 2427f3eb5384SStefan Weinhuber * We can let the block layer handle this by setting 2428f3eb5384SStefan Weinhuber * blk_queue_segment_boundary to page boundaries and 2429f3eb5384SStefan Weinhuber * blk_max_segment_size to page size when setting up the request queue. 2430ef19298bSStefan Weinhuber * For write requests, a TIDAW must not cross track boundaries, because 2431ef19298bSStefan Weinhuber * we have to set the CBC flag on the last tidaw for each track. 2432f3eb5384SStefan Weinhuber */ 2433ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) { 2434ef19298bSStefan Weinhuber new_track = 1; 2435ef19298bSStefan Weinhuber recid = first_rec; 2436f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 2437f3eb5384SStefan Weinhuber dst = page_address(bv->bv_page) + bv->bv_offset; 2438ef19298bSStefan Weinhuber seg_len = bv->bv_len; 2439ef19298bSStefan Weinhuber while (seg_len) { 2440ef19298bSStefan Weinhuber if (new_track) { 2441ef19298bSStefan Weinhuber trkid = recid; 2442ef19298bSStefan Weinhuber offs = sector_div(trkid, blk_per_trk); 2443ef19298bSStefan Weinhuber count_to_trk_end = blk_per_trk - offs; 2444ef19298bSStefan Weinhuber count = min((last_rec - recid + 1), 2445ef19298bSStefan Weinhuber (sector_t)count_to_trk_end); 2446ef19298bSStefan Weinhuber len_to_track_end = count * blksize; 2447ef19298bSStefan Weinhuber recid += count; 2448ef19298bSStefan Weinhuber new_track = 0; 2449f3eb5384SStefan Weinhuber } 2450ef19298bSStefan Weinhuber part_len = min(seg_len, len_to_track_end); 2451ef19298bSStefan Weinhuber seg_len -= part_len; 2452ef19298bSStefan Weinhuber len_to_track_end -= part_len; 2453ef19298bSStefan Weinhuber /* We need to end the tidaw at track end */ 2454ef19298bSStefan Weinhuber if (!len_to_track_end) { 2455ef19298bSStefan Weinhuber new_track = 1; 2456ef19298bSStefan Weinhuber tidaw_flags = TIDAW_FLAGS_INSERT_CBC; 2457ef19298bSStefan Weinhuber } else 2458ef19298bSStefan Weinhuber tidaw_flags = 0; 2459ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, 2460ef19298bSStefan Weinhuber dst, part_len); 2461ef19298bSStefan Weinhuber if (IS_ERR(last_tidaw)) 2462ef19298bSStefan Weinhuber return ERR_PTR(-EINVAL); 2463ef19298bSStefan Weinhuber dst += part_len; 2464ef19298bSStefan Weinhuber } 2465ef19298bSStefan Weinhuber } 2466ef19298bSStefan Weinhuber } else { 2467ef19298bSStefan Weinhuber rq_for_each_segment(bv, req, iter) { 2468ef19298bSStefan Weinhuber dst = page_address(bv->bv_page) + bv->bv_offset; 2469ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, 0x00, 2470ef19298bSStefan Weinhuber dst, bv->bv_len); 2471ef19298bSStefan Weinhuber if (IS_ERR(last_tidaw)) 2472ef19298bSStefan Weinhuber return ERR_PTR(-EINVAL); 2473ef19298bSStefan Weinhuber } 2474ef19298bSStefan Weinhuber } 2475ef19298bSStefan Weinhuber last_tidaw->flags |= TIDAW_FLAGS_LAST; 2476ef19298bSStefan Weinhuber last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; 2477f3eb5384SStefan Weinhuber itcw_finalize(itcw); 2478f3eb5384SStefan Weinhuber 2479f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 2480f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 2481f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2482ef19298bSStefan Weinhuber cqr->cpmode = 1; 2483f3eb5384SStefan Weinhuber cqr->startdev = startdev; 2484f3eb5384SStefan Weinhuber cqr->memdev = startdev; 2485f3eb5384SStefan Weinhuber cqr->block = block; 24867c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2487f3eb5384SStefan Weinhuber cqr->lpm = private->path_data.ppm; 2488f3eb5384SStefan Weinhuber cqr->retries = 256; 2489f3eb5384SStefan Weinhuber cqr->buildclk = get_clock(); 2490f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 2491f3eb5384SStefan Weinhuber return cqr; 2492f3eb5384SStefan Weinhuber } 2493f3eb5384SStefan Weinhuber 2494f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 2495f3eb5384SStefan Weinhuber struct dasd_block *block, 2496f3eb5384SStefan Weinhuber struct request *req) 2497f3eb5384SStefan Weinhuber { 2498ef19298bSStefan Weinhuber int cmdrtd, cmdwtd; 2499f3eb5384SStefan Weinhuber int use_prefix; 2500ef19298bSStefan Weinhuber int fcx_multitrack; 250145b44d76SStefan Weinhuber struct dasd_eckd_private *private; 2502f3eb5384SStefan Weinhuber struct dasd_device *basedev; 2503f3eb5384SStefan Weinhuber sector_t first_rec, last_rec; 2504f3eb5384SStefan Weinhuber sector_t first_trk, last_trk; 2505f3eb5384SStefan Weinhuber unsigned int first_offs, last_offs; 2506f3eb5384SStefan Weinhuber unsigned int blk_per_trk, blksize; 2507f3eb5384SStefan Weinhuber int cdlspecial; 2508ef19298bSStefan Weinhuber unsigned int data_size; 2509f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 2510f3eb5384SStefan Weinhuber 2511f3eb5384SStefan Weinhuber basedev = block->base; 2512f3eb5384SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 2513f3eb5384SStefan Weinhuber 2514f3eb5384SStefan Weinhuber /* Calculate number of blocks/records per track. */ 2515f3eb5384SStefan Weinhuber blksize = block->bp_block; 2516f3eb5384SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 25176fca97a9SStefan Haberland if (blk_per_trk == 0) 25186fca97a9SStefan Haberland return ERR_PTR(-EINVAL); 2519f3eb5384SStefan Weinhuber /* Calculate record id of first and last block. */ 252083096ebfSTejun Heo first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; 2521f3eb5384SStefan Weinhuber first_offs = sector_div(first_trk, blk_per_trk); 2522f3eb5384SStefan Weinhuber last_rec = last_trk = 252383096ebfSTejun Heo (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 2524f3eb5384SStefan Weinhuber last_offs = sector_div(last_trk, blk_per_trk); 2525f3eb5384SStefan Weinhuber cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); 2526f3eb5384SStefan Weinhuber 2527ef19298bSStefan Weinhuber fcx_multitrack = private->features.feature[40] & 0x20; 2528ef19298bSStefan Weinhuber data_size = blk_rq_bytes(req); 2529ef19298bSStefan Weinhuber /* tpm write request add CBC data on each track boundary */ 2530ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 2531ef19298bSStefan Weinhuber data_size += (last_trk - first_trk) * 4; 2532f3eb5384SStefan Weinhuber 2533f3eb5384SStefan Weinhuber /* is read track data and write track data in command mode supported? */ 2534f3eb5384SStefan Weinhuber cmdrtd = private->features.feature[9] & 0x20; 2535f3eb5384SStefan Weinhuber cmdwtd = private->features.feature[12] & 0x40; 2536f3eb5384SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 2537f3eb5384SStefan Weinhuber 2538f3eb5384SStefan Weinhuber cqr = NULL; 2539f3eb5384SStefan Weinhuber if (cdlspecial || dasd_page_cache) { 2540f3eb5384SStefan Weinhuber /* do nothing, just fall through to the cmd mode single case */ 2541ef19298bSStefan Weinhuber } else if ((data_size <= private->fcx_max_data) 2542ef19298bSStefan Weinhuber && (fcx_multitrack || (first_trk == last_trk))) { 2543f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, 2544f3eb5384SStefan Weinhuber first_rec, last_rec, 2545f3eb5384SStefan Weinhuber first_trk, last_trk, 2546f3eb5384SStefan Weinhuber first_offs, last_offs, 2547f3eb5384SStefan Weinhuber blk_per_trk, blksize); 2548ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 2549ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 2550f3eb5384SStefan Weinhuber cqr = NULL; 2551f3eb5384SStefan Weinhuber } else if (use_prefix && 2552f3eb5384SStefan Weinhuber (((rq_data_dir(req) == READ) && cmdrtd) || 2553f3eb5384SStefan Weinhuber ((rq_data_dir(req) == WRITE) && cmdwtd))) { 2554f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, 2555f3eb5384SStefan Weinhuber first_rec, last_rec, 2556f3eb5384SStefan Weinhuber first_trk, last_trk, 2557f3eb5384SStefan Weinhuber first_offs, last_offs, 2558f3eb5384SStefan Weinhuber blk_per_trk, blksize); 2559ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 2560ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 2561f3eb5384SStefan Weinhuber cqr = NULL; 2562f3eb5384SStefan Weinhuber } 2563f3eb5384SStefan Weinhuber if (!cqr) 2564f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, 2565f3eb5384SStefan Weinhuber first_rec, last_rec, 2566f3eb5384SStefan Weinhuber first_trk, last_trk, 2567f3eb5384SStefan Weinhuber first_offs, last_offs, 2568f3eb5384SStefan Weinhuber blk_per_trk, blksize); 2569f3eb5384SStefan Weinhuber return cqr; 2570f3eb5384SStefan Weinhuber } 2571f3eb5384SStefan Weinhuber 25721da177e4SLinus Torvalds static int 25731da177e4SLinus Torvalds dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 25741da177e4SLinus Torvalds { 25751da177e4SLinus Torvalds struct dasd_eckd_private *private; 25761da177e4SLinus Torvalds struct ccw1 *ccw; 25775705f702SNeilBrown struct req_iterator iter; 25781da177e4SLinus Torvalds struct bio_vec *bv; 25791da177e4SLinus Torvalds char *dst, *cda; 25801da177e4SLinus Torvalds unsigned int blksize, blk_per_trk, off; 25811da177e4SLinus Torvalds sector_t recid; 25825705f702SNeilBrown int status; 25831da177e4SLinus Torvalds 25841da177e4SLinus Torvalds if (!dasd_page_cache) 25851da177e4SLinus Torvalds goto out; 25868e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) cqr->block->base->private; 25878e09f215SStefan Weinhuber blksize = cqr->block->bp_block; 25881da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 258983096ebfSTejun Heo recid = blk_rq_pos(req) >> cqr->block->s2b_shift; 25901da177e4SLinus Torvalds ccw = cqr->cpaddr; 25911da177e4SLinus Torvalds /* Skip over define extent & locate record. */ 25921da177e4SLinus Torvalds ccw++; 25931da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 25941da177e4SLinus Torvalds ccw++; 25955705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 25961da177e4SLinus Torvalds dst = page_address(bv->bv_page) + bv->bv_offset; 25971da177e4SLinus Torvalds for (off = 0; off < bv->bv_len; off += blksize) { 25981da177e4SLinus Torvalds /* Skip locate record. */ 25991da177e4SLinus Torvalds if (private->uses_cdl && recid <= 2*blk_per_trk) 26001da177e4SLinus Torvalds ccw++; 26011da177e4SLinus Torvalds if (dst) { 26021da177e4SLinus Torvalds if (ccw->flags & CCW_FLAG_IDA) 26031da177e4SLinus Torvalds cda = *((char **)((addr_t) ccw->cda)); 26041da177e4SLinus Torvalds else 26051da177e4SLinus Torvalds cda = (char *)((addr_t) ccw->cda); 26061da177e4SLinus Torvalds if (dst != cda) { 26071da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 26081da177e4SLinus Torvalds memcpy(dst, cda, bv->bv_len); 26091da177e4SLinus Torvalds kmem_cache_free(dasd_page_cache, 26101da177e4SLinus Torvalds (void *)((addr_t)cda & PAGE_MASK)); 26111da177e4SLinus Torvalds } 26121da177e4SLinus Torvalds dst = NULL; 26131da177e4SLinus Torvalds } 26141da177e4SLinus Torvalds ccw++; 26151da177e4SLinus Torvalds recid++; 26161da177e4SLinus Torvalds } 26171da177e4SLinus Torvalds } 26181da177e4SLinus Torvalds out: 26191da177e4SLinus Torvalds status = cqr->status == DASD_CQR_DONE; 26208e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 26211da177e4SLinus Torvalds return status; 26221da177e4SLinus Torvalds } 26231da177e4SLinus Torvalds 26248e09f215SStefan Weinhuber /* 2625f3eb5384SStefan Weinhuber * Modify ccw/tcw in cqr so it can be started on a base device. 26268e09f215SStefan Weinhuber * 26278e09f215SStefan Weinhuber * Note that this is not enough to restart the cqr! 26288e09f215SStefan Weinhuber * Either reset cqr->startdev as well (summary unit check handling) 26298e09f215SStefan Weinhuber * or restart via separate cqr (as in ERP handling). 26308e09f215SStefan Weinhuber */ 26318e09f215SStefan Weinhuber void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 26328e09f215SStefan Weinhuber { 26338e09f215SStefan Weinhuber struct ccw1 *ccw; 26348e09f215SStefan Weinhuber struct PFX_eckd_data *pfxdata; 2635f3eb5384SStefan Weinhuber struct tcw *tcw; 2636f3eb5384SStefan Weinhuber struct tccb *tccb; 2637f3eb5384SStefan Weinhuber struct dcw *dcw; 26388e09f215SStefan Weinhuber 2639f3eb5384SStefan Weinhuber if (cqr->cpmode == 1) { 2640f3eb5384SStefan Weinhuber tcw = cqr->cpaddr; 2641f3eb5384SStefan Weinhuber tccb = tcw_get_tccb(tcw); 2642f3eb5384SStefan Weinhuber dcw = (struct dcw *)&tccb->tca[0]; 2643f3eb5384SStefan Weinhuber pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; 2644f3eb5384SStefan Weinhuber pfxdata->validity.verify_base = 0; 2645f3eb5384SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 2646f3eb5384SStefan Weinhuber } else { 26478e09f215SStefan Weinhuber ccw = cqr->cpaddr; 26488e09f215SStefan Weinhuber pfxdata = cqr->data; 26498e09f215SStefan Weinhuber if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 26508e09f215SStefan Weinhuber pfxdata->validity.verify_base = 0; 26518e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 26528e09f215SStefan Weinhuber } 26538e09f215SStefan Weinhuber } 2654f3eb5384SStefan Weinhuber } 26558e09f215SStefan Weinhuber 26568e09f215SStefan Weinhuber #define DASD_ECKD_CHANQ_MAX_SIZE 4 26578e09f215SStefan Weinhuber 26588e09f215SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 26598e09f215SStefan Weinhuber struct dasd_block *block, 26608e09f215SStefan Weinhuber struct request *req) 26618e09f215SStefan Weinhuber { 26628e09f215SStefan Weinhuber struct dasd_eckd_private *private; 26638e09f215SStefan Weinhuber struct dasd_device *startdev; 26648e09f215SStefan Weinhuber unsigned long flags; 26658e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 26668e09f215SStefan Weinhuber 26678e09f215SStefan Weinhuber startdev = dasd_alias_get_start_dev(base); 26688e09f215SStefan Weinhuber if (!startdev) 26698e09f215SStefan Weinhuber startdev = base; 26708e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) startdev->private; 26718e09f215SStefan Weinhuber if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 26728e09f215SStefan Weinhuber return ERR_PTR(-EBUSY); 26738e09f215SStefan Weinhuber 26748e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 26758e09f215SStefan Weinhuber private->count++; 26768e09f215SStefan Weinhuber cqr = dasd_eckd_build_cp(startdev, block, req); 26778e09f215SStefan Weinhuber if (IS_ERR(cqr)) 26788e09f215SStefan Weinhuber private->count--; 26798e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 26808e09f215SStefan Weinhuber return cqr; 26818e09f215SStefan Weinhuber } 26828e09f215SStefan Weinhuber 26838e09f215SStefan Weinhuber static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 26848e09f215SStefan Weinhuber struct request *req) 26858e09f215SStefan Weinhuber { 26868e09f215SStefan Weinhuber struct dasd_eckd_private *private; 26878e09f215SStefan Weinhuber unsigned long flags; 26888e09f215SStefan Weinhuber 26898e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 26908e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) cqr->memdev->private; 26918e09f215SStefan Weinhuber private->count--; 26928e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 26938e09f215SStefan Weinhuber return dasd_eckd_free_cp(cqr, req); 26948e09f215SStefan Weinhuber } 26958e09f215SStefan Weinhuber 26961da177e4SLinus Torvalds static int 26971da177e4SLinus Torvalds dasd_eckd_fill_info(struct dasd_device * device, 26981da177e4SLinus Torvalds struct dasd_information2_t * info) 26991da177e4SLinus Torvalds { 27001da177e4SLinus Torvalds struct dasd_eckd_private *private; 27011da177e4SLinus Torvalds 27021da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 27031da177e4SLinus Torvalds info->label_block = 2; 27041da177e4SLinus Torvalds info->FBA_layout = private->uses_cdl ? 0 : 1; 27051da177e4SLinus Torvalds info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 27061da177e4SLinus Torvalds info->characteristics_size = sizeof(struct dasd_eckd_characteristics); 27071da177e4SLinus Torvalds memcpy(info->characteristics, &private->rdc_data, 27081da177e4SLinus Torvalds sizeof(struct dasd_eckd_characteristics)); 27094abb08c2SStefan Weinhuber info->confdata_size = min((unsigned long)private->conf_len, 27104abb08c2SStefan Weinhuber sizeof(info->configuration_data)); 27114abb08c2SStefan Weinhuber memcpy(info->configuration_data, private->conf_data, 27124abb08c2SStefan Weinhuber info->confdata_size); 27131da177e4SLinus Torvalds return 0; 27141da177e4SLinus Torvalds } 27151da177e4SLinus Torvalds 27161da177e4SLinus Torvalds /* 27171da177e4SLinus Torvalds * SECTION: ioctl functions for eckd devices. 27181da177e4SLinus Torvalds */ 27191da177e4SLinus Torvalds 27201da177e4SLinus Torvalds /* 27211da177e4SLinus Torvalds * Release device ioctl. 27221da177e4SLinus Torvalds * Buils a channel programm to releases a prior reserved 27231da177e4SLinus Torvalds * (see dasd_eckd_reserve) device. 27241da177e4SLinus Torvalds */ 27251da177e4SLinus Torvalds static int 27261107ccfbSChristoph Hellwig dasd_eckd_release(struct dasd_device *device) 27271da177e4SLinus Torvalds { 27281da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 27291da177e4SLinus Torvalds int rc; 2730f3eb5384SStefan Weinhuber struct ccw1 *ccw; 2731f932bceaSStefan Weinhuber int useglobal; 27321da177e4SLinus Torvalds 27331da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 27341da177e4SLinus Torvalds return -EACCES; 27351da177e4SLinus Torvalds 2736f932bceaSStefan Weinhuber useglobal = 0; 273768b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 27381da177e4SLinus Torvalds if (IS_ERR(cqr)) { 2739f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 2740f932bceaSStefan Weinhuber useglobal = 1; 2741f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 2742f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 2743f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 2744f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 2745f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 2746f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 2747f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 27481da177e4SLinus Torvalds } 2749f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 2750f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RELEASE; 2751f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 2752f3eb5384SStefan Weinhuber ccw->count = 32; 2753f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 27548e09f215SStefan Weinhuber cqr->startdev = device; 27558e09f215SStefan Weinhuber cqr->memdev = device; 27561da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 27571c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2758336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 27591da177e4SLinus Torvalds cqr->expires = 2 * HZ; 27601da177e4SLinus Torvalds cqr->buildclk = get_clock(); 27611da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 27621da177e4SLinus Torvalds 27631da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 27641da177e4SLinus Torvalds 2765f932bceaSStefan Weinhuber if (useglobal) 2766f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 2767f932bceaSStefan Weinhuber else 27688e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 27691da177e4SLinus Torvalds return rc; 27701da177e4SLinus Torvalds } 27711da177e4SLinus Torvalds 27721da177e4SLinus Torvalds /* 27731da177e4SLinus Torvalds * Reserve device ioctl. 27741da177e4SLinus Torvalds * Options are set to 'synchronous wait for interrupt' and 27751da177e4SLinus Torvalds * 'timeout the request'. This leads to a terminate IO if 27761da177e4SLinus Torvalds * the interrupt is outstanding for a certain time. 27771da177e4SLinus Torvalds */ 27781da177e4SLinus Torvalds static int 27791107ccfbSChristoph Hellwig dasd_eckd_reserve(struct dasd_device *device) 27801da177e4SLinus Torvalds { 27811da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 27821da177e4SLinus Torvalds int rc; 2783f3eb5384SStefan Weinhuber struct ccw1 *ccw; 2784f932bceaSStefan Weinhuber int useglobal; 27851da177e4SLinus Torvalds 27861da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 27871da177e4SLinus Torvalds return -EACCES; 27881da177e4SLinus Torvalds 2789f932bceaSStefan Weinhuber useglobal = 0; 279068b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 27911da177e4SLinus Torvalds if (IS_ERR(cqr)) { 2792f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 2793f932bceaSStefan Weinhuber useglobal = 1; 2794f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 2795f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 2796f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 2797f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 2798f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 2799f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 2800f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 28011da177e4SLinus Torvalds } 2802f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 2803f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RESERVE; 2804f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 2805f3eb5384SStefan Weinhuber ccw->count = 32; 2806f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 28078e09f215SStefan Weinhuber cqr->startdev = device; 28088e09f215SStefan Weinhuber cqr->memdev = device; 28091da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 28101c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2811336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 28121da177e4SLinus Torvalds cqr->expires = 2 * HZ; 28131da177e4SLinus Torvalds cqr->buildclk = get_clock(); 28141da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 28151da177e4SLinus Torvalds 28161da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 28171da177e4SLinus Torvalds 2818f932bceaSStefan Weinhuber if (useglobal) 2819f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 2820f932bceaSStefan Weinhuber else 28218e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 28221da177e4SLinus Torvalds return rc; 28231da177e4SLinus Torvalds } 28241da177e4SLinus Torvalds 28251da177e4SLinus Torvalds /* 28261da177e4SLinus Torvalds * Steal lock ioctl - unconditional reserve device. 28271da177e4SLinus Torvalds * Buils a channel programm to break a device's reservation. 28281da177e4SLinus Torvalds * (unconditional reserve) 28291da177e4SLinus Torvalds */ 28301da177e4SLinus Torvalds static int 28311107ccfbSChristoph Hellwig dasd_eckd_steal_lock(struct dasd_device *device) 28321da177e4SLinus Torvalds { 28331da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 28341da177e4SLinus Torvalds int rc; 2835f3eb5384SStefan Weinhuber struct ccw1 *ccw; 2836f932bceaSStefan Weinhuber int useglobal; 28371da177e4SLinus Torvalds 28381da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 28391da177e4SLinus Torvalds return -EACCES; 28401da177e4SLinus Torvalds 2841f932bceaSStefan Weinhuber useglobal = 0; 284268b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 28431da177e4SLinus Torvalds if (IS_ERR(cqr)) { 2844f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 2845f932bceaSStefan Weinhuber useglobal = 1; 2846f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 2847f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 2848f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 2849f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 2850f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 2851f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 2852f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 28531da177e4SLinus Torvalds } 2854f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 2855f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SLCK; 2856f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 2857f3eb5384SStefan Weinhuber ccw->count = 32; 2858f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 28598e09f215SStefan Weinhuber cqr->startdev = device; 28608e09f215SStefan Weinhuber cqr->memdev = device; 28611da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 28621c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2863336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 28641da177e4SLinus Torvalds cqr->expires = 2 * HZ; 28651da177e4SLinus Torvalds cqr->buildclk = get_clock(); 28661da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 28671da177e4SLinus Torvalds 28681da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 28691da177e4SLinus Torvalds 2870f932bceaSStefan Weinhuber if (useglobal) 2871f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 2872f932bceaSStefan Weinhuber else 28738e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 28741da177e4SLinus Torvalds return rc; 28751da177e4SLinus Torvalds } 28761da177e4SLinus Torvalds 28771da177e4SLinus Torvalds /* 2878196339f1SStefan Weinhuber * SNID - Sense Path Group ID 2879196339f1SStefan Weinhuber * This ioctl may be used in situations where I/O is stalled due to 2880196339f1SStefan Weinhuber * a reserve, so if the normal dasd_smalloc_request fails, we use the 2881196339f1SStefan Weinhuber * preallocated dasd_reserve_req. 2882196339f1SStefan Weinhuber */ 2883196339f1SStefan Weinhuber static int dasd_eckd_snid(struct dasd_device *device, 2884196339f1SStefan Weinhuber void __user *argp) 2885196339f1SStefan Weinhuber { 2886196339f1SStefan Weinhuber struct dasd_ccw_req *cqr; 2887196339f1SStefan Weinhuber int rc; 2888196339f1SStefan Weinhuber struct ccw1 *ccw; 2889196339f1SStefan Weinhuber int useglobal; 2890196339f1SStefan Weinhuber struct dasd_snid_ioctl_data usrparm; 2891196339f1SStefan Weinhuber 2892196339f1SStefan Weinhuber if (!capable(CAP_SYS_ADMIN)) 2893196339f1SStefan Weinhuber return -EACCES; 2894196339f1SStefan Weinhuber 2895196339f1SStefan Weinhuber if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 2896196339f1SStefan Weinhuber return -EFAULT; 2897196339f1SStefan Weinhuber 2898196339f1SStefan Weinhuber useglobal = 0; 2899196339f1SStefan Weinhuber cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 2900196339f1SStefan Weinhuber sizeof(struct dasd_snid_data), device); 2901196339f1SStefan Weinhuber if (IS_ERR(cqr)) { 2902196339f1SStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 2903196339f1SStefan Weinhuber useglobal = 1; 2904196339f1SStefan Weinhuber cqr = &dasd_reserve_req->cqr; 2905196339f1SStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 2906196339f1SStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 2907196339f1SStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 2908196339f1SStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 2909196339f1SStefan Weinhuber cqr->data = &dasd_reserve_req->data; 2910196339f1SStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 2911196339f1SStefan Weinhuber } 2912196339f1SStefan Weinhuber ccw = cqr->cpaddr; 2913196339f1SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SNID; 2914196339f1SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 2915196339f1SStefan Weinhuber ccw->count = 12; 2916196339f1SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 2917196339f1SStefan Weinhuber cqr->startdev = device; 2918196339f1SStefan Weinhuber cqr->memdev = device; 2919196339f1SStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 2920196339f1SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2921196339f1SStefan Weinhuber cqr->retries = 5; 2922196339f1SStefan Weinhuber cqr->expires = 10 * HZ; 2923196339f1SStefan Weinhuber cqr->buildclk = get_clock(); 2924196339f1SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 2925196339f1SStefan Weinhuber cqr->lpm = usrparm.path_mask; 2926196339f1SStefan Weinhuber 2927196339f1SStefan Weinhuber rc = dasd_sleep_on_immediatly(cqr); 2928196339f1SStefan Weinhuber /* verify that I/O processing didn't modify the path mask */ 2929196339f1SStefan Weinhuber if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) 2930196339f1SStefan Weinhuber rc = -EIO; 2931196339f1SStefan Weinhuber if (!rc) { 2932196339f1SStefan Weinhuber usrparm.data = *((struct dasd_snid_data *)cqr->data); 2933196339f1SStefan Weinhuber if (copy_to_user(argp, &usrparm, sizeof(usrparm))) 2934196339f1SStefan Weinhuber rc = -EFAULT; 2935196339f1SStefan Weinhuber } 2936196339f1SStefan Weinhuber 2937196339f1SStefan Weinhuber if (useglobal) 2938196339f1SStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 2939196339f1SStefan Weinhuber else 2940196339f1SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 2941196339f1SStefan Weinhuber return rc; 2942196339f1SStefan Weinhuber } 2943196339f1SStefan Weinhuber 2944196339f1SStefan Weinhuber /* 29451da177e4SLinus Torvalds * Read performance statistics 29461da177e4SLinus Torvalds */ 29471da177e4SLinus Torvalds static int 29481107ccfbSChristoph Hellwig dasd_eckd_performance(struct dasd_device *device, void __user *argp) 29491da177e4SLinus Torvalds { 29501da177e4SLinus Torvalds struct dasd_psf_prssd_data *prssdp; 29511da177e4SLinus Torvalds struct dasd_rssd_perf_stats_t *stats; 29521da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 29531da177e4SLinus Torvalds struct ccw1 *ccw; 29541da177e4SLinus Torvalds int rc; 29551da177e4SLinus Torvalds 295668b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 29571da177e4SLinus Torvalds (sizeof(struct dasd_psf_prssd_data) + 29581da177e4SLinus Torvalds sizeof(struct dasd_rssd_perf_stats_t)), 29591da177e4SLinus Torvalds device); 29601da177e4SLinus Torvalds if (IS_ERR(cqr)) { 2961fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 29621da177e4SLinus Torvalds "Could not allocate initialization request"); 29631da177e4SLinus Torvalds return PTR_ERR(cqr); 29641da177e4SLinus Torvalds } 29658e09f215SStefan Weinhuber cqr->startdev = device; 29668e09f215SStefan Weinhuber cqr->memdev = device; 29671da177e4SLinus Torvalds cqr->retries = 0; 2968eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 29691da177e4SLinus Torvalds cqr->expires = 10 * HZ; 29701da177e4SLinus Torvalds 29711da177e4SLinus Torvalds /* Prepare for Read Subsystem Data */ 29721da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 29731da177e4SLinus Torvalds memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 29741da177e4SLinus Torvalds prssdp->order = PSF_ORDER_PRSSD; 29755d67d164SJoe Perches prssdp->suborder = 0x01; /* Performance Statistics */ 29761da177e4SLinus Torvalds prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 29771da177e4SLinus Torvalds 29781da177e4SLinus Torvalds ccw = cqr->cpaddr; 29791da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_PSF; 29801da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_psf_prssd_data); 29811da177e4SLinus Torvalds ccw->flags |= CCW_FLAG_CC; 29821da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) prssdp; 29831da177e4SLinus Torvalds 29841da177e4SLinus Torvalds /* Read Subsystem Data - Performance Statistics */ 29851da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 29861da177e4SLinus Torvalds memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 29871da177e4SLinus Torvalds 29881da177e4SLinus Torvalds ccw++; 29891da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_RSSD; 29901da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 29911da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) stats; 29921da177e4SLinus Torvalds 29931da177e4SLinus Torvalds cqr->buildclk = get_clock(); 29941da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 29951da177e4SLinus Torvalds rc = dasd_sleep_on(cqr); 29961da177e4SLinus Torvalds if (rc == 0) { 29971da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 29981da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 29991107ccfbSChristoph Hellwig if (copy_to_user(argp, stats, 30001107ccfbSChristoph Hellwig sizeof(struct dasd_rssd_perf_stats_t))) 30011107ccfbSChristoph Hellwig rc = -EFAULT; 30021da177e4SLinus Torvalds } 30038e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 30041da177e4SLinus Torvalds return rc; 30051da177e4SLinus Torvalds } 30061da177e4SLinus Torvalds 30071da177e4SLinus Torvalds /* 30081da177e4SLinus Torvalds * Get attributes (cache operations) 30091da177e4SLinus Torvalds * Returnes the cache attributes used in Define Extend (DE). 30101da177e4SLinus Torvalds */ 30111da177e4SLinus Torvalds static int 30121107ccfbSChristoph Hellwig dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 30131da177e4SLinus Torvalds { 30141107ccfbSChristoph Hellwig struct dasd_eckd_private *private = 30151107ccfbSChristoph Hellwig (struct dasd_eckd_private *)device->private; 30161107ccfbSChristoph Hellwig struct attrib_data_t attrib = private->attrib; 30171da177e4SLinus Torvalds int rc; 30181da177e4SLinus Torvalds 30191da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 30201da177e4SLinus Torvalds return -EACCES; 30211107ccfbSChristoph Hellwig if (!argp) 30221da177e4SLinus Torvalds return -EINVAL; 30231da177e4SLinus Torvalds 30241107ccfbSChristoph Hellwig rc = 0; 30251107ccfbSChristoph Hellwig if (copy_to_user(argp, (long *) &attrib, 30261107ccfbSChristoph Hellwig sizeof(struct attrib_data_t))) 30271107ccfbSChristoph Hellwig rc = -EFAULT; 30281da177e4SLinus Torvalds 30291da177e4SLinus Torvalds return rc; 30301da177e4SLinus Torvalds } 30311da177e4SLinus Torvalds 30321da177e4SLinus Torvalds /* 30331da177e4SLinus Torvalds * Set attributes (cache operations) 30341da177e4SLinus Torvalds * Stores the attributes for cache operation to be used in Define Extend (DE). 30351da177e4SLinus Torvalds */ 30361da177e4SLinus Torvalds static int 30371107ccfbSChristoph Hellwig dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 30381da177e4SLinus Torvalds { 30391107ccfbSChristoph Hellwig struct dasd_eckd_private *private = 30401107ccfbSChristoph Hellwig (struct dasd_eckd_private *)device->private; 30411da177e4SLinus Torvalds struct attrib_data_t attrib; 30421da177e4SLinus Torvalds 30431da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 30441da177e4SLinus Torvalds return -EACCES; 30451107ccfbSChristoph Hellwig if (!argp) 30461da177e4SLinus Torvalds return -EINVAL; 30471da177e4SLinus Torvalds 30481107ccfbSChristoph Hellwig if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 30491da177e4SLinus Torvalds return -EFAULT; 30501da177e4SLinus Torvalds private->attrib = attrib; 30511da177e4SLinus Torvalds 3052fc19f381SStefan Haberland dev_info(&device->cdev->dev, 3053fc19f381SStefan Haberland "The DASD cache mode was set to %x (%i cylinder prestage)\n", 30541da177e4SLinus Torvalds private->attrib.operation, private->attrib.nr_cyl); 30551da177e4SLinus Torvalds return 0; 30561da177e4SLinus Torvalds } 30571da177e4SLinus Torvalds 3058ab1d848fSNigel Hislop /* 3059ab1d848fSNigel Hislop * Issue syscall I/O to EMC Symmetrix array. 3060ab1d848fSNigel Hislop * CCWs are PSF and RSSD 3061ab1d848fSNigel Hislop */ 3062ab1d848fSNigel Hislop static int dasd_symm_io(struct dasd_device *device, void __user *argp) 3063ab1d848fSNigel Hislop { 3064ab1d848fSNigel Hislop struct dasd_symmio_parms usrparm; 3065ab1d848fSNigel Hislop char *psf_data, *rssd_result; 3066ab1d848fSNigel Hislop struct dasd_ccw_req *cqr; 3067ab1d848fSNigel Hislop struct ccw1 *ccw; 306852898025SNigel Hislop char psf0, psf1; 3069ab1d848fSNigel Hislop int rc; 3070ab1d848fSNigel Hislop 307152898025SNigel Hislop if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) 307252898025SNigel Hislop return -EACCES; 307352898025SNigel Hislop psf0 = psf1 = 0; 307452898025SNigel Hislop 3075ab1d848fSNigel Hislop /* Copy parms from caller */ 3076ab1d848fSNigel Hislop rc = -EFAULT; 3077ab1d848fSNigel Hislop if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 3078ab1d848fSNigel Hislop goto out; 3079f8b06859SHeiko Carstens if (is_compat_task() || sizeof(long) == 4) { 3080ab1d848fSNigel Hislop /* Make sure pointers are sane even on 31 bit. */ 3081ab1d848fSNigel Hislop rc = -EINVAL; 3082f8b06859SHeiko Carstens if ((usrparm.psf_data >> 32) != 0) 3083ab1d848fSNigel Hislop goto out; 3084f8b06859SHeiko Carstens if ((usrparm.rssd_result >> 32) != 0) 3085f8b06859SHeiko Carstens goto out; 3086f8b06859SHeiko Carstens usrparm.psf_data &= 0x7fffffffULL; 3087f8b06859SHeiko Carstens usrparm.rssd_result &= 0x7fffffffULL; 3088ab1d848fSNigel Hislop } 3089ab1d848fSNigel Hislop /* alloc I/O data area */ 3090ab1d848fSNigel Hislop psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 3091ab1d848fSNigel Hislop rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 3092ab1d848fSNigel Hislop if (!psf_data || !rssd_result) { 3093ab1d848fSNigel Hislop rc = -ENOMEM; 3094ab1d848fSNigel Hislop goto out_free; 3095ab1d848fSNigel Hislop } 3096ab1d848fSNigel Hislop 3097ab1d848fSNigel Hislop /* get syscall header from user space */ 3098ab1d848fSNigel Hislop rc = -EFAULT; 3099ab1d848fSNigel Hislop if (copy_from_user(psf_data, 3100ab1d848fSNigel Hislop (void __user *)(unsigned long) usrparm.psf_data, 3101ab1d848fSNigel Hislop usrparm.psf_data_len)) 3102ab1d848fSNigel Hislop goto out_free; 310352898025SNigel Hislop psf0 = psf_data[0]; 310452898025SNigel Hislop psf1 = psf_data[1]; 3105ab1d848fSNigel Hislop 3106ab1d848fSNigel Hislop /* setup CCWs for PSF + RSSD */ 310768b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device); 3108ab1d848fSNigel Hislop if (IS_ERR(cqr)) { 3109fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3110ab1d848fSNigel Hislop "Could not allocate initialization request"); 3111ab1d848fSNigel Hislop rc = PTR_ERR(cqr); 3112ab1d848fSNigel Hislop goto out_free; 3113ab1d848fSNigel Hislop } 3114ab1d848fSNigel Hislop 3115ab1d848fSNigel Hislop cqr->startdev = device; 3116ab1d848fSNigel Hislop cqr->memdev = device; 3117ab1d848fSNigel Hislop cqr->retries = 3; 3118ab1d848fSNigel Hislop cqr->expires = 10 * HZ; 3119ab1d848fSNigel Hislop cqr->buildclk = get_clock(); 3120ab1d848fSNigel Hislop cqr->status = DASD_CQR_FILLED; 3121ab1d848fSNigel Hislop 3122ab1d848fSNigel Hislop /* Build the ccws */ 3123ab1d848fSNigel Hislop ccw = cqr->cpaddr; 3124ab1d848fSNigel Hislop 3125ab1d848fSNigel Hislop /* PSF ccw */ 3126ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_PSF; 3127ab1d848fSNigel Hislop ccw->count = usrparm.psf_data_len; 3128ab1d848fSNigel Hislop ccw->flags |= CCW_FLAG_CC; 3129ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) psf_data; 3130ab1d848fSNigel Hislop 3131ab1d848fSNigel Hislop ccw++; 3132ab1d848fSNigel Hislop 3133ab1d848fSNigel Hislop /* RSSD ccw */ 3134ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_RSSD; 3135ab1d848fSNigel Hislop ccw->count = usrparm.rssd_result_len; 3136ab1d848fSNigel Hislop ccw->flags = CCW_FLAG_SLI ; 3137ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) rssd_result; 3138ab1d848fSNigel Hislop 3139ab1d848fSNigel Hislop rc = dasd_sleep_on(cqr); 3140ab1d848fSNigel Hislop if (rc) 3141ab1d848fSNigel Hislop goto out_sfree; 3142ab1d848fSNigel Hislop 3143ab1d848fSNigel Hislop rc = -EFAULT; 3144ab1d848fSNigel Hislop if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 3145ab1d848fSNigel Hislop rssd_result, usrparm.rssd_result_len)) 3146ab1d848fSNigel Hislop goto out_sfree; 3147ab1d848fSNigel Hislop rc = 0; 3148ab1d848fSNigel Hislop 3149ab1d848fSNigel Hislop out_sfree: 3150ab1d848fSNigel Hislop dasd_sfree_request(cqr, cqr->memdev); 3151ab1d848fSNigel Hislop out_free: 3152ab1d848fSNigel Hislop kfree(rssd_result); 3153ab1d848fSNigel Hislop kfree(psf_data); 3154ab1d848fSNigel Hislop out: 315552898025SNigel Hislop DBF_DEV_EVENT(DBF_WARNING, device, 315652898025SNigel Hislop "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", 315752898025SNigel Hislop (int) psf0, (int) psf1, rc); 3158ab1d848fSNigel Hislop return rc; 3159ab1d848fSNigel Hislop } 3160ab1d848fSNigel Hislop 31611107ccfbSChristoph Hellwig static int 31628e09f215SStefan Weinhuber dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 31631107ccfbSChristoph Hellwig { 31648e09f215SStefan Weinhuber struct dasd_device *device = block->base; 31658e09f215SStefan Weinhuber 31661107ccfbSChristoph Hellwig switch (cmd) { 31671107ccfbSChristoph Hellwig case BIODASDGATTR: 31681107ccfbSChristoph Hellwig return dasd_eckd_get_attrib(device, argp); 31691107ccfbSChristoph Hellwig case BIODASDSATTR: 31701107ccfbSChristoph Hellwig return dasd_eckd_set_attrib(device, argp); 31711107ccfbSChristoph Hellwig case BIODASDPSRD: 31721107ccfbSChristoph Hellwig return dasd_eckd_performance(device, argp); 31731107ccfbSChristoph Hellwig case BIODASDRLSE: 31741107ccfbSChristoph Hellwig return dasd_eckd_release(device); 31751107ccfbSChristoph Hellwig case BIODASDRSRV: 31761107ccfbSChristoph Hellwig return dasd_eckd_reserve(device); 31771107ccfbSChristoph Hellwig case BIODASDSLCK: 31781107ccfbSChristoph Hellwig return dasd_eckd_steal_lock(device); 3179196339f1SStefan Weinhuber case BIODASDSNID: 3180196339f1SStefan Weinhuber return dasd_eckd_snid(device, argp); 3181ab1d848fSNigel Hislop case BIODASDSYMMIO: 3182ab1d848fSNigel Hislop return dasd_symm_io(device, argp); 31831107ccfbSChristoph Hellwig default: 31841107ccfbSChristoph Hellwig return -ENOIOCTLCMD; 31851107ccfbSChristoph Hellwig } 31861107ccfbSChristoph Hellwig } 31871107ccfbSChristoph Hellwig 31881da177e4SLinus Torvalds /* 3189445b5b49SHorst Hummel * Dump the range of CCWs into 'page' buffer 3190445b5b49SHorst Hummel * and return number of printed chars. 3191445b5b49SHorst Hummel */ 31924d284cacSHeiko Carstens static int 3193445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 3194445b5b49SHorst Hummel { 3195445b5b49SHorst Hummel int len, count; 3196445b5b49SHorst Hummel char *datap; 3197445b5b49SHorst Hummel 3198445b5b49SHorst Hummel len = 0; 3199445b5b49SHorst Hummel while (from <= to) { 3200445b5b49SHorst Hummel len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3201445b5b49SHorst Hummel " CCW %p: %08X %08X DAT:", 3202445b5b49SHorst Hummel from, ((int *) from)[0], ((int *) from)[1]); 3203445b5b49SHorst Hummel 3204445b5b49SHorst Hummel /* get pointer to data (consider IDALs) */ 3205445b5b49SHorst Hummel if (from->flags & CCW_FLAG_IDA) 3206445b5b49SHorst Hummel datap = (char *) *((addr_t *) (addr_t) from->cda); 3207445b5b49SHorst Hummel else 3208445b5b49SHorst Hummel datap = (char *) ((addr_t) from->cda); 3209445b5b49SHorst Hummel 3210445b5b49SHorst Hummel /* dump data (max 32 bytes) */ 3211445b5b49SHorst Hummel for (count = 0; count < from->count && count < 32; count++) { 3212445b5b49SHorst Hummel if (count % 8 == 0) len += sprintf(page + len, " "); 3213445b5b49SHorst Hummel if (count % 4 == 0) len += sprintf(page + len, " "); 3214445b5b49SHorst Hummel len += sprintf(page + len, "%02x", datap[count]); 3215445b5b49SHorst Hummel } 3216445b5b49SHorst Hummel len += sprintf(page + len, "\n"); 3217445b5b49SHorst Hummel from++; 3218445b5b49SHorst Hummel } 3219445b5b49SHorst Hummel return len; 3220445b5b49SHorst Hummel } 3221445b5b49SHorst Hummel 3222fc19f381SStefan Haberland static void 3223aeec92caSStefan Haberland dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 3224aeec92caSStefan Haberland char *reason) 3225fc19f381SStefan Haberland { 3226fc19f381SStefan Haberland u64 *sense; 3227a5a0061fSStefan Weinhuber u64 *stat; 3228fc19f381SStefan Haberland 3229aeec92caSStefan Haberland sense = (u64 *) dasd_get_sense(irb); 3230a5a0061fSStefan Weinhuber stat = (u64 *) &irb->scsw; 3231fc19f381SStefan Haberland if (sense) { 3232a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " 3233a5a0061fSStefan Weinhuber "%016llx %016llx %016llx %016llx", 3234a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 3235ed3640b2SStefan Haberland sense[0], sense[1], sense[2], sense[3]); 3236fc19f381SStefan Haberland } else { 3237a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", 3238a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 3239a5a0061fSStefan Weinhuber "NO VALID SENSE"); 3240fc19f381SStefan Haberland } 3241fc19f381SStefan Haberland } 3242fc19f381SStefan Haberland 3243445b5b49SHorst Hummel /* 32441da177e4SLinus Torvalds * Print sense data and related channel program. 32451da177e4SLinus Torvalds * Parts are printed because printk buffer is only 1024 bytes. 32461da177e4SLinus Torvalds */ 3247f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 32488e09f215SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 32491da177e4SLinus Torvalds { 32501da177e4SLinus Torvalds char *page; 3251445b5b49SHorst Hummel struct ccw1 *first, *last, *fail, *from, *to; 3252445b5b49SHorst Hummel int len, sl, sct; 32531da177e4SLinus Torvalds 32541da177e4SLinus Torvalds page = (char *) get_zeroed_page(GFP_ATOMIC); 32551da177e4SLinus Torvalds if (page == NULL) { 3256fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3257fc19f381SStefan Haberland "No memory to dump sense data\n"); 32581da177e4SLinus Torvalds return; 32591da177e4SLinus Torvalds } 3260445b5b49SHorst Hummel /* dump the sense data */ 32611da177e4SLinus Torvalds len = sprintf(page, KERN_ERR PRINTK_HEADER 32621da177e4SLinus Torvalds " I/O status report for device %s:\n", 32632a0217d5SKay Sievers dev_name(&device->cdev->dev)); 32641da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3265a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 3266a5a0061fSStefan Weinhuber "CS:%02X RC:%d\n", 3267a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 3268a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 3269a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 3270a5a0061fSStefan Weinhuber req ? req->intrc : 0); 32711da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 32721da177e4SLinus Torvalds " device %s: Failing CCW: %p\n", 32732a0217d5SKay Sievers dev_name(&device->cdev->dev), 327423d805b6SPeter Oberparleiter (void *) (addr_t) irb->scsw.cmd.cpa); 32751da177e4SLinus Torvalds if (irb->esw.esw0.erw.cons) { 32761da177e4SLinus Torvalds for (sl = 0; sl < 4; sl++) { 32771da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 32781da177e4SLinus Torvalds " Sense(hex) %2d-%2d:", 32791da177e4SLinus Torvalds (8 * sl), ((8 * sl) + 7)); 32801da177e4SLinus Torvalds 32811da177e4SLinus Torvalds for (sct = 0; sct < 8; sct++) { 32821da177e4SLinus Torvalds len += sprintf(page + len, " %02x", 32831da177e4SLinus Torvalds irb->ecw[8 * sl + sct]); 32841da177e4SLinus Torvalds } 32851da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 32861da177e4SLinus Torvalds } 32871da177e4SLinus Torvalds 32881da177e4SLinus Torvalds if (irb->ecw[27] & DASD_SENSE_BIT_0) { 32891da177e4SLinus Torvalds /* 24 Byte Sense Data */ 3290445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 32911da177e4SLinus Torvalds " 24 Byte: %x MSG %x, " 32921da177e4SLinus Torvalds "%s MSGb to SYSOP\n", 32931da177e4SLinus Torvalds irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 32941da177e4SLinus Torvalds irb->ecw[1] & 0x10 ? "" : "no"); 32951da177e4SLinus Torvalds } else { 32961da177e4SLinus Torvalds /* 32 Byte Sense Data */ 3297445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 32981da177e4SLinus Torvalds " 32 Byte: Format: %x " 32991da177e4SLinus Torvalds "Exception class %x\n", 33001da177e4SLinus Torvalds irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 33011da177e4SLinus Torvalds } 33021da177e4SLinus Torvalds } else { 3303445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 33041da177e4SLinus Torvalds " SORRY - NO VALID SENSE AVAILABLE\n"); 33051da177e4SLinus Torvalds } 3306445b5b49SHorst Hummel printk("%s", page); 33071da177e4SLinus Torvalds 33088e09f215SStefan Weinhuber if (req) { 33098e09f215SStefan Weinhuber /* req == NULL for unsolicited interrupts */ 3310445b5b49SHorst Hummel /* dump the Channel Program (max 140 Bytes per line) */ 3311445b5b49SHorst Hummel /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 3312445b5b49SHorst Hummel first = req->cpaddr; 3313445b5b49SHorst Hummel for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 3314445b5b49SHorst Hummel to = min(first + 6, last); 33151da177e4SLinus Torvalds len = sprintf(page, KERN_ERR PRINTK_HEADER 33161da177e4SLinus Torvalds " Related CP in req: %p\n", req); 3317445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(first, to, page + len); 3318445b5b49SHorst Hummel printk("%s", page); 33191da177e4SLinus Torvalds 3320445b5b49SHorst Hummel /* print failing CCW area (maximum 4) */ 3321445b5b49SHorst Hummel /* scsw->cda is either valid or zero */ 33221da177e4SLinus Torvalds len = 0; 3323445b5b49SHorst Hummel from = ++to; 332423d805b6SPeter Oberparleiter fail = (struct ccw1 *)(addr_t) 332523d805b6SPeter Oberparleiter irb->scsw.cmd.cpa; /* failing CCW */ 3326445b5b49SHorst Hummel if (from < fail - 2) { 3327445b5b49SHorst Hummel from = fail - 2; /* there is a gap - print header */ 3328445b5b49SHorst Hummel len += sprintf(page, KERN_ERR PRINTK_HEADER "......\n"); 33291da177e4SLinus Torvalds } 3330445b5b49SHorst Hummel to = min(fail + 1, last); 3331445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, to, page + len); 33321da177e4SLinus Torvalds 3333445b5b49SHorst Hummel /* print last CCWs (maximum 2) */ 3334445b5b49SHorst Hummel from = max(from, ++to); 3335445b5b49SHorst Hummel if (from < last - 1) { 3336445b5b49SHorst Hummel from = last - 1; /* there is a gap - print header */ 33371da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n"); 33381da177e4SLinus Torvalds } 3339445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, last, page + len); 33401da177e4SLinus Torvalds if (len > 0) 3341445b5b49SHorst Hummel printk("%s", page); 33428e09f215SStefan Weinhuber } 33431da177e4SLinus Torvalds free_page((unsigned long) page); 33441da177e4SLinus Torvalds } 33451da177e4SLinus Torvalds 3346f3eb5384SStefan Weinhuber 3347f3eb5384SStefan Weinhuber /* 3348f3eb5384SStefan Weinhuber * Print sense data from a tcw. 3349f3eb5384SStefan Weinhuber */ 3350f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 3351f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 3352f3eb5384SStefan Weinhuber { 3353f3eb5384SStefan Weinhuber char *page; 3354f3eb5384SStefan Weinhuber int len, sl, sct, residual; 3355f3eb5384SStefan Weinhuber struct tsb *tsb; 3356ef19298bSStefan Weinhuber u8 *sense, *rcq; 3357f3eb5384SStefan Weinhuber 3358f3eb5384SStefan Weinhuber page = (char *) get_zeroed_page(GFP_ATOMIC); 3359f3eb5384SStefan Weinhuber if (page == NULL) { 3360fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, " %s", 3361f3eb5384SStefan Weinhuber "No memory to dump sense data"); 3362f3eb5384SStefan Weinhuber return; 3363f3eb5384SStefan Weinhuber } 3364f3eb5384SStefan Weinhuber /* dump the sense data */ 3365f3eb5384SStefan Weinhuber len = sprintf(page, KERN_ERR PRINTK_HEADER 3366f3eb5384SStefan Weinhuber " I/O status report for device %s:\n", 3367f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev)); 3368f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3369a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 3370a5a0061fSStefan Weinhuber "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", 3371a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 3372a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 3373a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 3374a5a0061fSStefan Weinhuber irb->scsw.tm.fcxs, irb->scsw.tm.schxs, 3375a5a0061fSStefan Weinhuber req ? req->intrc : 0); 3376f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3377f3eb5384SStefan Weinhuber " device %s: Failing TCW: %p\n", 3378f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev), 3379f3eb5384SStefan Weinhuber (void *) (addr_t) irb->scsw.tm.tcw); 3380f3eb5384SStefan Weinhuber 3381f3eb5384SStefan Weinhuber tsb = NULL; 3382f3eb5384SStefan Weinhuber sense = NULL; 3383a5a0061fSStefan Weinhuber if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) 3384f3eb5384SStefan Weinhuber tsb = tcw_get_tsb( 3385f3eb5384SStefan Weinhuber (struct tcw *)(unsigned long)irb->scsw.tm.tcw); 3386f3eb5384SStefan Weinhuber 3387b8fde722SStefan Haberland if (tsb) { 3388f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3389f3eb5384SStefan Weinhuber " tsb->length %d\n", tsb->length); 3390f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3391f3eb5384SStefan Weinhuber " tsb->flags %x\n", tsb->flags); 3392f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3393f3eb5384SStefan Weinhuber " tsb->dcw_offset %d\n", tsb->dcw_offset); 3394f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3395f3eb5384SStefan Weinhuber " tsb->count %d\n", tsb->count); 3396f3eb5384SStefan Weinhuber residual = tsb->count - 28; 3397f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3398f3eb5384SStefan Weinhuber " residual %d\n", residual); 3399f3eb5384SStefan Weinhuber 3400f3eb5384SStefan Weinhuber switch (tsb->flags & 0x07) { 3401f3eb5384SStefan Weinhuber case 1: /* tsa_iostat */ 3402f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3403f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_time %d\n", 3404f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_time); 3405f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3406f3eb5384SStefan Weinhuber " tsb->tsa.iostat.def_time %d\n", 3407f3eb5384SStefan Weinhuber tsb->tsa.iostat.def_time); 3408f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3409f3eb5384SStefan Weinhuber " tsb->tsa.iostat.queue_time %d\n", 3410f3eb5384SStefan Weinhuber tsb->tsa.iostat.queue_time); 3411f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3412f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_busy_time %d\n", 3413f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_busy_time); 3414f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3415f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_act_time %d\n", 3416f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_act_time); 3417f3eb5384SStefan Weinhuber sense = tsb->tsa.iostat.sense; 3418f3eb5384SStefan Weinhuber break; 3419f3eb5384SStefan Weinhuber case 2: /* ts_ddpc */ 3420f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3421f3eb5384SStefan Weinhuber " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); 3422ef19298bSStefan Weinhuber for (sl = 0; sl < 2; sl++) { 3423ef19298bSStefan Weinhuber len += sprintf(page + len, 3424ef19298bSStefan Weinhuber KERN_ERR PRINTK_HEADER 3425ef19298bSStefan Weinhuber " tsb->tsa.ddpc.rcq %2d-%2d: ", 3426ef19298bSStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 3427ef19298bSStefan Weinhuber rcq = tsb->tsa.ddpc.rcq; 3428f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 3429f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 3430ef19298bSStefan Weinhuber rcq[8 * sl + sct]); 3431f3eb5384SStefan Weinhuber } 3432f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 3433f3eb5384SStefan Weinhuber } 3434f3eb5384SStefan Weinhuber sense = tsb->tsa.ddpc.sense; 3435f3eb5384SStefan Weinhuber break; 3436f3eb5384SStefan Weinhuber case 3: /* tsa_intrg */ 3437f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3438f3eb5384SStefan Weinhuber " tsb->tsa.intrg.: not supportet yet \n"); 3439f3eb5384SStefan Weinhuber break; 3440f3eb5384SStefan Weinhuber } 3441f3eb5384SStefan Weinhuber 3442f3eb5384SStefan Weinhuber if (sense) { 3443f3eb5384SStefan Weinhuber for (sl = 0; sl < 4; sl++) { 3444f3eb5384SStefan Weinhuber len += sprintf(page + len, 3445f3eb5384SStefan Weinhuber KERN_ERR PRINTK_HEADER 3446f3eb5384SStefan Weinhuber " Sense(hex) %2d-%2d:", 3447f3eb5384SStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 3448f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 3449f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 3450f3eb5384SStefan Weinhuber sense[8 * sl + sct]); 3451f3eb5384SStefan Weinhuber } 3452f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 3453f3eb5384SStefan Weinhuber } 3454f3eb5384SStefan Weinhuber 3455f3eb5384SStefan Weinhuber if (sense[27] & DASD_SENSE_BIT_0) { 3456f3eb5384SStefan Weinhuber /* 24 Byte Sense Data */ 3457f3eb5384SStefan Weinhuber sprintf(page + len, KERN_ERR PRINTK_HEADER 3458f3eb5384SStefan Weinhuber " 24 Byte: %x MSG %x, " 3459f3eb5384SStefan Weinhuber "%s MSGb to SYSOP\n", 3460f3eb5384SStefan Weinhuber sense[7] >> 4, sense[7] & 0x0f, 3461f3eb5384SStefan Weinhuber sense[1] & 0x10 ? "" : "no"); 3462f3eb5384SStefan Weinhuber } else { 3463f3eb5384SStefan Weinhuber /* 32 Byte Sense Data */ 3464f3eb5384SStefan Weinhuber sprintf(page + len, KERN_ERR PRINTK_HEADER 3465f3eb5384SStefan Weinhuber " 32 Byte: Format: %x " 3466f3eb5384SStefan Weinhuber "Exception class %x\n", 3467f3eb5384SStefan Weinhuber sense[6] & 0x0f, sense[22] >> 4); 3468f3eb5384SStefan Weinhuber } 3469f3eb5384SStefan Weinhuber } else { 3470f3eb5384SStefan Weinhuber sprintf(page + len, KERN_ERR PRINTK_HEADER 3471f3eb5384SStefan Weinhuber " SORRY - NO VALID SENSE AVAILABLE\n"); 3472f3eb5384SStefan Weinhuber } 3473f3eb5384SStefan Weinhuber } else { 3474f3eb5384SStefan Weinhuber sprintf(page + len, KERN_ERR PRINTK_HEADER 3475f3eb5384SStefan Weinhuber " SORRY - NO TSB DATA AVAILABLE\n"); 3476f3eb5384SStefan Weinhuber } 3477f3eb5384SStefan Weinhuber printk("%s", page); 3478f3eb5384SStefan Weinhuber free_page((unsigned long) page); 3479f3eb5384SStefan Weinhuber } 3480f3eb5384SStefan Weinhuber 3481f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense(struct dasd_device *device, 3482f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 3483f3eb5384SStefan Weinhuber { 3484a5a0061fSStefan Weinhuber if (scsw_is_tm(&irb->scsw)) 3485f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_tcw(device, req, irb); 3486f3eb5384SStefan Weinhuber else 3487f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_ccw(device, req, irb); 3488f3eb5384SStefan Weinhuber } 3489f3eb5384SStefan Weinhuber 3490501183f2SStefan Haberland static int dasd_eckd_pm_freeze(struct dasd_device *device) 3491d41dd122SStefan Haberland { 3492d41dd122SStefan Haberland /* 3493d41dd122SStefan Haberland * the device should be disconnected from our LCU structure 3494d41dd122SStefan Haberland * on restore we will reconnect it and reread LCU specific 3495d41dd122SStefan Haberland * information like PAV support that might have changed 3496d41dd122SStefan Haberland */ 3497d41dd122SStefan Haberland dasd_alias_remove_device(device); 3498d41dd122SStefan Haberland dasd_alias_disconnect_device_from_lcu(device); 3499d41dd122SStefan Haberland 3500d41dd122SStefan Haberland return 0; 3501d41dd122SStefan Haberland } 3502d41dd122SStefan Haberland 3503501183f2SStefan Haberland static int dasd_eckd_restore_device(struct dasd_device *device) 3504d41dd122SStefan Haberland { 3505d41dd122SStefan Haberland struct dasd_eckd_private *private; 35066fca97a9SStefan Haberland struct dasd_eckd_characteristics temp_rdc_data; 3507d41dd122SStefan Haberland int is_known, rc; 3508d41dd122SStefan Haberland struct dasd_uid temp_uid; 3509a7602f6cSStefan Haberland unsigned long flags; 3510d41dd122SStefan Haberland 3511d41dd122SStefan Haberland private = (struct dasd_eckd_private *) device->private; 3512d41dd122SStefan Haberland 3513d41dd122SStefan Haberland /* Read Configuration Data */ 3514d41dd122SStefan Haberland rc = dasd_eckd_read_conf(device); 3515d41dd122SStefan Haberland if (rc) 3516d41dd122SStefan Haberland goto out_err; 3517d41dd122SStefan Haberland 35182dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 35192dedf0d9SStefan Haberland /* Generate device unique id */ 35202dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 35212dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 3522d41dd122SStefan Haberland if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) 3523a7602f6cSStefan Haberland dev_err(&device->cdev->dev, "The UID of the DASD has " 3524a7602f6cSStefan Haberland "changed\n"); 35252dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 3526d41dd122SStefan Haberland if (rc) 3527d41dd122SStefan Haberland goto out_err; 3528d41dd122SStefan Haberland 3529d41dd122SStefan Haberland /* register lcu with alias handling, enable PAV if this is a new lcu */ 3530d41dd122SStefan Haberland is_known = dasd_alias_make_device_known_to_lcu(device); 3531d41dd122SStefan Haberland if (is_known < 0) 3532d41dd122SStefan Haberland return is_known; 3533d41dd122SStefan Haberland if (!is_known) { 3534f4ac1d02SStefan Weinhuber dasd_eckd_validate_server(device); 3535f4ac1d02SStefan Weinhuber dasd_alias_lcu_setup_complete(device); 3536f4ac1d02SStefan Weinhuber } else 3537f4ac1d02SStefan Weinhuber dasd_alias_wait_for_lcu_setup(device); 3538f4ac1d02SStefan Weinhuber 3539f4ac1d02SStefan Weinhuber /* RE-Read Configuration Data */ 3540f4ac1d02SStefan Weinhuber rc = dasd_eckd_read_conf(device); 3541d41dd122SStefan Haberland if (rc) 3542d41dd122SStefan Haberland goto out_err; 3543d41dd122SStefan Haberland 3544d41dd122SStefan Haberland /* Read Feature Codes */ 354568d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 3546d41dd122SStefan Haberland 3547d41dd122SStefan Haberland /* Read Device Characteristics */ 354868b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 35496fca97a9SStefan Haberland &temp_rdc_data, 64); 3550d41dd122SStefan Haberland if (rc) { 3551b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 3552b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 3553d41dd122SStefan Haberland goto out_err; 3554d41dd122SStefan Haberland } 3555a7602f6cSStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 35566fca97a9SStefan Haberland memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data)); 3557a7602f6cSStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 3558d41dd122SStefan Haberland 3559d41dd122SStefan Haberland /* add device to alias management */ 3560d41dd122SStefan Haberland dasd_alias_add_device(device); 3561d41dd122SStefan Haberland 3562d41dd122SStefan Haberland return 0; 3563d41dd122SStefan Haberland 3564d41dd122SStefan Haberland out_err: 3565e6125fbaSStefan Haberland return -1; 3566d41dd122SStefan Haberland } 3567d41dd122SStefan Haberland 3568501183f2SStefan Haberland static int dasd_eckd_reload_device(struct dasd_device *device) 3569501183f2SStefan Haberland { 3570501183f2SStefan Haberland struct dasd_eckd_private *private; 3571501183f2SStefan Haberland int rc, old_base; 35722dedf0d9SStefan Haberland char print_uid[60]; 35732dedf0d9SStefan Haberland struct dasd_uid uid; 35742dedf0d9SStefan Haberland unsigned long flags; 3575501183f2SStefan Haberland 3576501183f2SStefan Haberland private = (struct dasd_eckd_private *) device->private; 35772dedf0d9SStefan Haberland 35782dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 3579501183f2SStefan Haberland old_base = private->uid.base_unit_addr; 35802dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 35812dedf0d9SStefan Haberland 3582501183f2SStefan Haberland /* Read Configuration Data */ 3583501183f2SStefan Haberland rc = dasd_eckd_read_conf(device); 3584501183f2SStefan Haberland if (rc) 3585501183f2SStefan Haberland goto out_err; 3586501183f2SStefan Haberland 35872dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 3588501183f2SStefan Haberland if (rc) 3589501183f2SStefan Haberland goto out_err; 3590501183f2SStefan Haberland /* 3591501183f2SStefan Haberland * update unit address configuration and 3592501183f2SStefan Haberland * add device to alias management 3593501183f2SStefan Haberland */ 3594501183f2SStefan Haberland dasd_alias_update_add_device(device); 3595501183f2SStefan Haberland 35962dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &uid); 35972dedf0d9SStefan Haberland 35982dedf0d9SStefan Haberland if (old_base != uid.base_unit_addr) { 35992dedf0d9SStefan Haberland if (strlen(uid.vduit) > 0) 36002dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 36012dedf0d9SStefan Haberland "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial, 36022dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr, uid.vduit); 3603501183f2SStefan Haberland else 36042dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 36052dedf0d9SStefan Haberland "%s.%s.%04x.%02x", uid.vendor, uid.serial, 36062dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr); 3607501183f2SStefan Haberland 3608501183f2SStefan Haberland dev_info(&device->cdev->dev, 3609501183f2SStefan Haberland "An Alias device was reassigned to a new base device " 36102dedf0d9SStefan Haberland "with UID: %s\n", print_uid); 3611501183f2SStefan Haberland } 3612501183f2SStefan Haberland return 0; 3613501183f2SStefan Haberland 3614501183f2SStefan Haberland out_err: 3615501183f2SStefan Haberland return -1; 3616501183f2SStefan Haberland } 3617501183f2SStefan Haberland 3618d41dd122SStefan Haberland static struct ccw_driver dasd_eckd_driver = { 3619d41dd122SStefan Haberland .name = "dasd-eckd", 3620d41dd122SStefan Haberland .owner = THIS_MODULE, 3621d41dd122SStefan Haberland .ids = dasd_eckd_ids, 3622d41dd122SStefan Haberland .probe = dasd_eckd_probe, 3623d41dd122SStefan Haberland .remove = dasd_generic_remove, 3624d41dd122SStefan Haberland .set_offline = dasd_generic_set_offline, 3625d41dd122SStefan Haberland .set_online = dasd_eckd_set_online, 3626d41dd122SStefan Haberland .notify = dasd_generic_notify, 3627d41dd122SStefan Haberland .freeze = dasd_generic_pm_freeze, 3628d41dd122SStefan Haberland .thaw = dasd_generic_restore_device, 3629d41dd122SStefan Haberland .restore = dasd_generic_restore_device, 3630a23ed009SStefan Haberland .uc_handler = dasd_generic_uc_handler, 3631d41dd122SStefan Haberland }; 3632f3eb5384SStefan Weinhuber 36331da177e4SLinus Torvalds /* 36341da177e4SLinus Torvalds * max_blocks is dependent on the amount of storage that is available 36351da177e4SLinus Torvalds * in the static io buffer for each device. Currently each device has 36361da177e4SLinus Torvalds * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has 36371da177e4SLinus Torvalds * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use 36381da177e4SLinus Torvalds * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In 36391da177e4SLinus Torvalds * addition we have one define extent ccw + 16 bytes of data and one 36401da177e4SLinus Torvalds * locate record ccw + 16 bytes of data. That makes: 36411da177e4SLinus Torvalds * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. 36421da177e4SLinus Torvalds * We want to fit two into the available memory so that we can immediately 36431da177e4SLinus Torvalds * start the next request if one finishes off. That makes 249.5 blocks 36441da177e4SLinus Torvalds * for one request. Give a little safety and the result is 240. 36451da177e4SLinus Torvalds */ 36461da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline = { 36471da177e4SLinus Torvalds .owner = THIS_MODULE, 36481da177e4SLinus Torvalds .name = "ECKD", 36491da177e4SLinus Torvalds .ebcname = "ECKD", 3650ef19298bSStefan Weinhuber .max_blocks = 190, 36511da177e4SLinus Torvalds .check_device = dasd_eckd_check_characteristics, 36528e09f215SStefan Weinhuber .uncheck_device = dasd_eckd_uncheck_device, 36531da177e4SLinus Torvalds .do_analysis = dasd_eckd_do_analysis, 36548e09f215SStefan Weinhuber .ready_to_online = dasd_eckd_ready_to_online, 36558e09f215SStefan Weinhuber .online_to_ready = dasd_eckd_online_to_ready, 36561da177e4SLinus Torvalds .fill_geometry = dasd_eckd_fill_geometry, 36571da177e4SLinus Torvalds .start_IO = dasd_start_IO, 36581da177e4SLinus Torvalds .term_IO = dasd_term_IO, 36598e09f215SStefan Weinhuber .handle_terminated_request = dasd_eckd_handle_terminated_request, 36601da177e4SLinus Torvalds .format_device = dasd_eckd_format_device, 36611da177e4SLinus Torvalds .erp_action = dasd_eckd_erp_action, 36621da177e4SLinus Torvalds .erp_postaction = dasd_eckd_erp_postaction, 36638e09f215SStefan Weinhuber .handle_unsolicited_interrupt = dasd_eckd_handle_unsolicited_interrupt, 36648e09f215SStefan Weinhuber .build_cp = dasd_eckd_build_alias_cp, 36658e09f215SStefan Weinhuber .free_cp = dasd_eckd_free_alias_cp, 36661da177e4SLinus Torvalds .dump_sense = dasd_eckd_dump_sense, 3667fc19f381SStefan Haberland .dump_sense_dbf = dasd_eckd_dump_sense_dbf, 36681da177e4SLinus Torvalds .fill_info = dasd_eckd_fill_info, 36691107ccfbSChristoph Hellwig .ioctl = dasd_eckd_ioctl, 3670d41dd122SStefan Haberland .freeze = dasd_eckd_pm_freeze, 3671d41dd122SStefan Haberland .restore = dasd_eckd_restore_device, 3672501183f2SStefan Haberland .reload = dasd_eckd_reload_device, 36732dedf0d9SStefan Haberland .get_uid = dasd_eckd_get_uid, 36741da177e4SLinus Torvalds }; 36751da177e4SLinus Torvalds 36761da177e4SLinus Torvalds static int __init 36771da177e4SLinus Torvalds dasd_eckd_init(void) 36781da177e4SLinus Torvalds { 3679736e6ea0SSebastian Ott int ret; 3680736e6ea0SSebastian Ott 36811da177e4SLinus Torvalds ASCEBC(dasd_eckd_discipline.ebcname, 4); 3682f932bceaSStefan Weinhuber dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), 3683f932bceaSStefan Weinhuber GFP_KERNEL | GFP_DMA); 3684f932bceaSStefan Weinhuber if (!dasd_reserve_req) 3685f932bceaSStefan Weinhuber return -ENOMEM; 3686736e6ea0SSebastian Ott ret = ccw_driver_register(&dasd_eckd_driver); 3687736e6ea0SSebastian Ott if (!ret) 3688736e6ea0SSebastian Ott wait_for_device_probe(); 3689f932bceaSStefan Weinhuber else 3690f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 3691736e6ea0SSebastian Ott return ret; 36921da177e4SLinus Torvalds } 36931da177e4SLinus Torvalds 36941da177e4SLinus Torvalds static void __exit 36951da177e4SLinus Torvalds dasd_eckd_cleanup(void) 36961da177e4SLinus Torvalds { 36971da177e4SLinus Torvalds ccw_driver_unregister(&dasd_eckd_driver); 3698f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 36991da177e4SLinus Torvalds } 37001da177e4SLinus Torvalds 37011da177e4SLinus Torvalds module_init(dasd_eckd_init); 37021da177e4SLinus Torvalds module_exit(dasd_eckd_cleanup); 3703