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 110840545573SHorst Hummel /* 11093d052595SHorst Hummel * Check device characteristics. 11103d052595SHorst Hummel * If the device is accessible using ECKD discipline, the device is enabled. 11113d052595SHorst Hummel */ 11121da177e4SLinus Torvalds static int 11131da177e4SLinus Torvalds dasd_eckd_check_characteristics(struct dasd_device *device) 11141da177e4SLinus Torvalds { 11151da177e4SLinus Torvalds struct dasd_eckd_private *private; 11168e09f215SStefan Weinhuber struct dasd_block *block; 11172dedf0d9SStefan Haberland struct dasd_uid temp_uid; 11187c8faa86SStefan Haberland int is_known, rc, i; 111933b62a30SStefan Weinhuber int readonly; 11207c8faa86SStefan Haberland unsigned long value; 11211da177e4SLinus Torvalds 1122454e1fa1SPeter Oberparleiter if (!ccw_device_is_pathgroup(device->cdev)) { 1123454e1fa1SPeter Oberparleiter dev_warn(&device->cdev->dev, 1124454e1fa1SPeter Oberparleiter "A channel path group could not be established\n"); 1125454e1fa1SPeter Oberparleiter return -EIO; 1126454e1fa1SPeter Oberparleiter } 1127454e1fa1SPeter Oberparleiter if (!ccw_device_is_multipath(device->cdev)) { 1128454e1fa1SPeter Oberparleiter dev_info(&device->cdev->dev, 1129454e1fa1SPeter Oberparleiter "The DASD is not operating in multipath mode\n"); 1130454e1fa1SPeter Oberparleiter } 11311da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 113292636b15SSebastian Ott if (!private) { 113392636b15SSebastian Ott private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); 113492636b15SSebastian Ott if (!private) { 1135fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1136fc19f381SStefan Haberland "Allocating memory for private DASD data " 1137fc19f381SStefan Haberland "failed\n"); 11381da177e4SLinus Torvalds return -ENOMEM; 11391da177e4SLinus Torvalds } 11401da177e4SLinus Torvalds device->private = (void *) private; 114192636b15SSebastian Ott } else { 114292636b15SSebastian Ott memset(private, 0, sizeof(*private)); 11431da177e4SLinus Torvalds } 11441da177e4SLinus Torvalds /* Invalidate status of initial analysis. */ 11451da177e4SLinus Torvalds private->init_cqr_status = -1; 11461da177e4SLinus Torvalds /* Set default cache operations. */ 11471da177e4SLinus Torvalds private->attrib.operation = DASD_NORMAL_CACHE; 11481da177e4SLinus Torvalds private->attrib.nr_cyl = 0; 11491da177e4SLinus Torvalds 115040545573SHorst Hummel /* Read Configuration Data */ 115140545573SHorst Hummel rc = dasd_eckd_read_conf(device); 115240545573SHorst Hummel if (rc) 11538e09f215SStefan Weinhuber goto out_err1; 115440545573SHorst Hummel 11557c8faa86SStefan Haberland /* set default timeout */ 11567c8faa86SStefan Haberland device->default_expires = DASD_EXPIRES; 11577c8faa86SStefan Haberland if (private->gneq) { 11587c8faa86SStefan Haberland value = 1; 11597c8faa86SStefan Haberland for (i = 0; i < private->gneq->timeout.value; i++) 11607c8faa86SStefan Haberland value = 10 * value; 11617c8faa86SStefan Haberland value = value * private->gneq->timeout.number; 11627c8faa86SStefan Haberland /* do not accept useless values */ 11637c8faa86SStefan Haberland if (value != 0 && value <= DASD_EXPIRES_MAX) 11647c8faa86SStefan Haberland device->default_expires = value; 11657c8faa86SStefan Haberland } 11667c8faa86SStefan Haberland 11672dedf0d9SStefan Haberland /* Generate device unique id */ 11682dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 116940545573SHorst Hummel if (rc) 11708e09f215SStefan Weinhuber goto out_err1; 11718e09f215SStefan Weinhuber 11722dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 11732dedf0d9SStefan Haberland if (temp_uid.type == UA_BASE_DEVICE) { 11748e09f215SStefan Weinhuber block = dasd_alloc_block(); 11758e09f215SStefan Weinhuber if (IS_ERR(block)) { 1176b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1177b8ed5dd5SStefan Haberland "could not allocate dasd " 1178b8ed5dd5SStefan Haberland "block structure"); 11798e09f215SStefan Weinhuber rc = PTR_ERR(block); 11808e09f215SStefan Weinhuber goto out_err1; 11818e09f215SStefan Weinhuber } 11828e09f215SStefan Weinhuber device->block = block; 11838e09f215SStefan Weinhuber block->base = device; 11848e09f215SStefan Weinhuber } 11858e09f215SStefan Weinhuber 11868e09f215SStefan Weinhuber /* register lcu with alias handling, enable PAV if this is a new lcu */ 11878e09f215SStefan Weinhuber is_known = dasd_alias_make_device_known_to_lcu(device); 11888e09f215SStefan Weinhuber if (is_known < 0) { 11898e09f215SStefan Weinhuber rc = is_known; 11908e09f215SStefan Weinhuber goto out_err2; 11918e09f215SStefan Weinhuber } 1192f4ac1d02SStefan Weinhuber /* 1193817f2c84SNikanth Karthikesan * dasd_eckd_validate_server is done on the first device that 1194f4ac1d02SStefan Weinhuber * is found for an LCU. All later other devices have to wait 1195f4ac1d02SStefan Weinhuber * for it, so they will read the correct feature codes. 1196f4ac1d02SStefan Weinhuber */ 11978e09f215SStefan Weinhuber if (!is_known) { 1198f4ac1d02SStefan Weinhuber dasd_eckd_validate_server(device); 1199f4ac1d02SStefan Weinhuber dasd_alias_lcu_setup_complete(device); 1200f4ac1d02SStefan Weinhuber } else 1201f4ac1d02SStefan Weinhuber dasd_alias_wait_for_lcu_setup(device); 1202f4ac1d02SStefan Weinhuber 1203f4ac1d02SStefan Weinhuber /* device may report different configuration data after LCU setup */ 1204f4ac1d02SStefan Weinhuber rc = dasd_eckd_read_conf(device); 120540545573SHorst Hummel if (rc) 12068e09f215SStefan Weinhuber goto out_err3; 12078e09f215SStefan Weinhuber 12088e09f215SStefan Weinhuber /* Read Feature Codes */ 120968d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 121040545573SHorst Hummel 12111da177e4SLinus Torvalds /* Read Device Characteristics */ 121268b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 121368b781feSStefan Haberland &private->rdc_data, 64); 12148e09f215SStefan Weinhuber if (rc) { 1215b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1216b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 12178e09f215SStefan Weinhuber goto out_err3; 12188e09f215SStefan Weinhuber } 1219817f2c84SNikanth Karthikesan /* find the valid cylinder size */ 1220b44b0ab3SStefan Weinhuber if (private->rdc_data.no_cyl == LV_COMPAT_CYL && 1221b44b0ab3SStefan Weinhuber private->rdc_data.long_no_cyl) 1222b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.long_no_cyl; 1223b44b0ab3SStefan Weinhuber else 1224b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.no_cyl; 1225b44b0ab3SStefan Weinhuber 122633b62a30SStefan Weinhuber readonly = dasd_device_is_ro(device); 122733b62a30SStefan Weinhuber if (readonly) 122833b62a30SStefan Weinhuber set_bit(DASD_FLAG_DEVICE_RO, &device->flags); 122933b62a30SStefan Weinhuber 1230fc19f381SStefan Haberland dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " 123133b62a30SStefan Weinhuber "with %d cylinders, %d heads, %d sectors%s\n", 12321da177e4SLinus Torvalds private->rdc_data.dev_type, 12331da177e4SLinus Torvalds private->rdc_data.dev_model, 12341da177e4SLinus Torvalds private->rdc_data.cu_type, 12351da177e4SLinus Torvalds private->rdc_data.cu_model.model, 1236b44b0ab3SStefan Weinhuber private->real_cyl, 12371da177e4SLinus Torvalds private->rdc_data.trk_per_cyl, 123833b62a30SStefan Weinhuber private->rdc_data.sec_per_trk, 123933b62a30SStefan Weinhuber readonly ? ", read-only device" : ""); 12408e09f215SStefan Weinhuber return 0; 12418e09f215SStefan Weinhuber 12428e09f215SStefan Weinhuber out_err3: 12438e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 12448e09f215SStefan Weinhuber out_err2: 12458e09f215SStefan Weinhuber dasd_free_block(device->block); 12468e09f215SStefan Weinhuber device->block = NULL; 12478e09f215SStefan Weinhuber out_err1: 12484abb08c2SStefan Weinhuber kfree(private->conf_data); 12498e09f215SStefan Weinhuber kfree(device->private); 12508e09f215SStefan Weinhuber device->private = NULL; 12513d052595SHorst Hummel return rc; 12521da177e4SLinus Torvalds } 12531da177e4SLinus Torvalds 12548e09f215SStefan Weinhuber static void dasd_eckd_uncheck_device(struct dasd_device *device) 12558e09f215SStefan Weinhuber { 12564abb08c2SStefan Weinhuber struct dasd_eckd_private *private; 12574abb08c2SStefan Weinhuber 12584abb08c2SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 12598e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 12604abb08c2SStefan Weinhuber private->ned = NULL; 12614abb08c2SStefan Weinhuber private->sneq = NULL; 12624abb08c2SStefan Weinhuber private->vdsneq = NULL; 12634abb08c2SStefan Weinhuber private->gneq = NULL; 12644abb08c2SStefan Weinhuber private->conf_len = 0; 12654abb08c2SStefan Weinhuber kfree(private->conf_data); 12664abb08c2SStefan Weinhuber private->conf_data = NULL; 12678e09f215SStefan Weinhuber } 12688e09f215SStefan Weinhuber 12691da177e4SLinus Torvalds static struct dasd_ccw_req * 12701da177e4SLinus Torvalds dasd_eckd_analysis_ccw(struct dasd_device *device) 12711da177e4SLinus Torvalds { 12721da177e4SLinus Torvalds struct dasd_eckd_private *private; 12731da177e4SLinus Torvalds struct eckd_count *count_data; 12741da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 12751da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 12761da177e4SLinus Torvalds struct ccw1 *ccw; 12771da177e4SLinus Torvalds int cplength, datasize; 12781da177e4SLinus Torvalds int i; 12791da177e4SLinus Torvalds 12801da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 12811da177e4SLinus Torvalds 12821da177e4SLinus Torvalds cplength = 8; 12831da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 128468b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 12851da177e4SLinus Torvalds if (IS_ERR(cqr)) 12861da177e4SLinus Torvalds return cqr; 12871da177e4SLinus Torvalds ccw = cqr->cpaddr; 12881da177e4SLinus Torvalds /* Define extent for the first 3 tracks. */ 12891da177e4SLinus Torvalds define_extent(ccw++, cqr->data, 0, 2, 12901da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device); 12911da177e4SLinus Torvalds LO_data = cqr->data + sizeof(struct DE_eckd_data); 12921da177e4SLinus Torvalds /* Locate record for the first 4 records on track 0. */ 12931da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 12941da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 0, 0, 4, 12951da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 12961da177e4SLinus Torvalds 12971da177e4SLinus Torvalds count_data = private->count_area; 12981da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 12991da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 13001da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 13011da177e4SLinus Torvalds ccw->flags = 0; 13021da177e4SLinus Torvalds ccw->count = 8; 13031da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 13041da177e4SLinus Torvalds ccw++; 13051da177e4SLinus Torvalds count_data++; 13061da177e4SLinus Torvalds } 13071da177e4SLinus Torvalds 13081da177e4SLinus Torvalds /* Locate record for the first record on track 2. */ 13091da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 13101da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 2, 0, 1, 13111da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 13121da177e4SLinus Torvalds /* Read count ccw. */ 13131da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 13141da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 13151da177e4SLinus Torvalds ccw->flags = 0; 13161da177e4SLinus Torvalds ccw->count = 8; 13171da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 13181da177e4SLinus Torvalds 13198e09f215SStefan Weinhuber cqr->block = NULL; 13208e09f215SStefan Weinhuber cqr->startdev = device; 13218e09f215SStefan Weinhuber cqr->memdev = device; 1322eb6e199bSStefan Weinhuber cqr->retries = 255; 13231da177e4SLinus Torvalds cqr->buildclk = get_clock(); 13241da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 13251da177e4SLinus Torvalds return cqr; 13261da177e4SLinus Torvalds } 13271da177e4SLinus Torvalds 1328eb6e199bSStefan Weinhuber /* differentiate between 'no record found' and any other error */ 1329eb6e199bSStefan Weinhuber static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) 1330eb6e199bSStefan Weinhuber { 1331eb6e199bSStefan Weinhuber char *sense; 1332eb6e199bSStefan Weinhuber if (init_cqr->status == DASD_CQR_DONE) 1333eb6e199bSStefan Weinhuber return INIT_CQR_OK; 1334eb6e199bSStefan Weinhuber else if (init_cqr->status == DASD_CQR_NEED_ERP || 1335eb6e199bSStefan Weinhuber init_cqr->status == DASD_CQR_FAILED) { 1336eb6e199bSStefan Weinhuber sense = dasd_get_sense(&init_cqr->irb); 1337eb6e199bSStefan Weinhuber if (sense && (sense[1] & SNS1_NO_REC_FOUND)) 1338eb6e199bSStefan Weinhuber return INIT_CQR_UNFORMATTED; 1339eb6e199bSStefan Weinhuber else 1340eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 1341eb6e199bSStefan Weinhuber } else 1342eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 1343eb6e199bSStefan Weinhuber } 1344eb6e199bSStefan Weinhuber 13451da177e4SLinus Torvalds /* 13461da177e4SLinus Torvalds * This is the callback function for the init_analysis cqr. It saves 13471da177e4SLinus Torvalds * the status of the initial analysis ccw before it frees it and kicks 13481da177e4SLinus Torvalds * the device to continue the startup sequence. This will call 13491da177e4SLinus Torvalds * dasd_eckd_do_analysis again (if the devices has not been marked 13501da177e4SLinus Torvalds * for deletion in the meantime). 13511da177e4SLinus Torvalds */ 1352eb6e199bSStefan Weinhuber static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, 1353eb6e199bSStefan Weinhuber void *data) 13541da177e4SLinus Torvalds { 13551da177e4SLinus Torvalds struct dasd_eckd_private *private; 13561da177e4SLinus Torvalds struct dasd_device *device; 13571da177e4SLinus Torvalds 13588e09f215SStefan Weinhuber device = init_cqr->startdev; 13591da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 1360eb6e199bSStefan Weinhuber private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); 13611da177e4SLinus Torvalds dasd_sfree_request(init_cqr, device); 13621da177e4SLinus Torvalds dasd_kick_device(device); 13631da177e4SLinus Torvalds } 13641da177e4SLinus Torvalds 1365eb6e199bSStefan Weinhuber static int dasd_eckd_start_analysis(struct dasd_block *block) 13661da177e4SLinus Torvalds { 13671da177e4SLinus Torvalds struct dasd_eckd_private *private; 13681da177e4SLinus Torvalds struct dasd_ccw_req *init_cqr; 13691da177e4SLinus Torvalds 13708e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 13718e09f215SStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(block->base); 13721da177e4SLinus Torvalds if (IS_ERR(init_cqr)) 13731da177e4SLinus Torvalds return PTR_ERR(init_cqr); 13741da177e4SLinus Torvalds init_cqr->callback = dasd_eckd_analysis_callback; 13751da177e4SLinus Torvalds init_cqr->callback_data = NULL; 13761da177e4SLinus Torvalds init_cqr->expires = 5*HZ; 1377eb6e199bSStefan Weinhuber /* first try without ERP, so we can later handle unformatted 1378eb6e199bSStefan Weinhuber * devices as special case 1379eb6e199bSStefan Weinhuber */ 1380eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); 1381eb6e199bSStefan Weinhuber init_cqr->retries = 0; 13821da177e4SLinus Torvalds dasd_add_request_head(init_cqr); 13831da177e4SLinus Torvalds return -EAGAIN; 13841da177e4SLinus Torvalds } 13851da177e4SLinus Torvalds 1386eb6e199bSStefan Weinhuber static int dasd_eckd_end_analysis(struct dasd_block *block) 13871da177e4SLinus Torvalds { 13888e09f215SStefan Weinhuber struct dasd_device *device; 13891da177e4SLinus Torvalds struct dasd_eckd_private *private; 13901da177e4SLinus Torvalds struct eckd_count *count_area; 13911da177e4SLinus Torvalds unsigned int sb, blk_per_trk; 13921da177e4SLinus Torvalds int status, i; 1393eb6e199bSStefan Weinhuber struct dasd_ccw_req *init_cqr; 13941da177e4SLinus Torvalds 13958e09f215SStefan Weinhuber device = block->base; 13961da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 13971da177e4SLinus Torvalds status = private->init_cqr_status; 13981da177e4SLinus Torvalds private->init_cqr_status = -1; 1399eb6e199bSStefan Weinhuber if (status == INIT_CQR_ERROR) { 1400eb6e199bSStefan Weinhuber /* try again, this time with full ERP */ 1401eb6e199bSStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(device); 1402eb6e199bSStefan Weinhuber dasd_sleep_on(init_cqr); 1403eb6e199bSStefan Weinhuber status = dasd_eckd_analysis_evaluation(init_cqr); 1404eb6e199bSStefan Weinhuber dasd_sfree_request(init_cqr, device); 1405eb6e199bSStefan Weinhuber } 1406eb6e199bSStefan Weinhuber 1407eb6e199bSStefan Weinhuber if (status == INIT_CQR_UNFORMATTED) { 1408eb6e199bSStefan Weinhuber dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); 14091da177e4SLinus Torvalds return -EMEDIUMTYPE; 1410eb6e199bSStefan Weinhuber } else if (status == INIT_CQR_ERROR) { 1411eb6e199bSStefan Weinhuber dev_err(&device->cdev->dev, 1412eb6e199bSStefan Weinhuber "Detecting the DASD disk layout failed because " 1413eb6e199bSStefan Weinhuber "of an I/O error\n"); 1414eb6e199bSStefan Weinhuber return -EIO; 14151da177e4SLinus Torvalds } 14161da177e4SLinus Torvalds 14171da177e4SLinus Torvalds private->uses_cdl = 1; 14181da177e4SLinus Torvalds /* Check Track 0 for Compatible Disk Layout */ 14191da177e4SLinus Torvalds count_area = NULL; 14201da177e4SLinus Torvalds for (i = 0; i < 3; i++) { 14211da177e4SLinus Torvalds if (private->count_area[i].kl != 4 || 14221da177e4SLinus Torvalds private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4) { 14231da177e4SLinus Torvalds private->uses_cdl = 0; 14241da177e4SLinus Torvalds break; 14251da177e4SLinus Torvalds } 14261da177e4SLinus Torvalds } 14271da177e4SLinus Torvalds if (i == 3) 14281da177e4SLinus Torvalds count_area = &private->count_area[4]; 14291da177e4SLinus Torvalds 14301da177e4SLinus Torvalds if (private->uses_cdl == 0) { 14311da177e4SLinus Torvalds for (i = 0; i < 5; i++) { 14321da177e4SLinus Torvalds if ((private->count_area[i].kl != 0) || 14331da177e4SLinus Torvalds (private->count_area[i].dl != 14341da177e4SLinus Torvalds private->count_area[0].dl)) 14351da177e4SLinus Torvalds break; 14361da177e4SLinus Torvalds } 14371da177e4SLinus Torvalds if (i == 5) 14381da177e4SLinus Torvalds count_area = &private->count_area[0]; 14391da177e4SLinus Torvalds } else { 14401da177e4SLinus Torvalds if (private->count_area[3].record == 1) 1441fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1442fc19f381SStefan Haberland "Track 0 has no records following the VTOC\n"); 14431da177e4SLinus Torvalds } 14441da177e4SLinus Torvalds if (count_area != NULL && count_area->kl == 0) { 14451da177e4SLinus Torvalds /* we found notthing violating our disk layout */ 14461da177e4SLinus Torvalds if (dasd_check_blocksize(count_area->dl) == 0) 14478e09f215SStefan Weinhuber block->bp_block = count_area->dl; 14481da177e4SLinus Torvalds } 14498e09f215SStefan Weinhuber if (block->bp_block == 0) { 1450fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1451fc19f381SStefan Haberland "The disk layout of the DASD is not supported\n"); 14521da177e4SLinus Torvalds return -EMEDIUMTYPE; 14531da177e4SLinus Torvalds } 14548e09f215SStefan Weinhuber block->s2b_shift = 0; /* bits to shift 512 to get a block */ 14558e09f215SStefan Weinhuber for (sb = 512; sb < block->bp_block; sb = sb << 1) 14568e09f215SStefan Weinhuber block->s2b_shift++; 14571da177e4SLinus Torvalds 14588e09f215SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 1459b44b0ab3SStefan Weinhuber block->blocks = (private->real_cyl * 14601da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 14611da177e4SLinus Torvalds blk_per_trk); 14621da177e4SLinus Torvalds 1463fc19f381SStefan Haberland dev_info(&device->cdev->dev, 1464fc19f381SStefan Haberland "DASD with %d KB/block, %d KB total size, %d KB/track, " 1465fc19f381SStefan Haberland "%s\n", (block->bp_block >> 10), 1466b44b0ab3SStefan Weinhuber ((private->real_cyl * 14671da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 14688e09f215SStefan Weinhuber blk_per_trk * (block->bp_block >> 9)) >> 1), 14698e09f215SStefan Weinhuber ((blk_per_trk * block->bp_block) >> 10), 14701da177e4SLinus Torvalds private->uses_cdl ? 14711da177e4SLinus Torvalds "compatible disk layout" : "linux disk layout"); 14721da177e4SLinus Torvalds 14731da177e4SLinus Torvalds return 0; 14741da177e4SLinus Torvalds } 14751da177e4SLinus Torvalds 14768e09f215SStefan Weinhuber static int dasd_eckd_do_analysis(struct dasd_block *block) 14771da177e4SLinus Torvalds { 14781da177e4SLinus Torvalds struct dasd_eckd_private *private; 14791da177e4SLinus Torvalds 14808e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 14811da177e4SLinus Torvalds if (private->init_cqr_status < 0) 14828e09f215SStefan Weinhuber return dasd_eckd_start_analysis(block); 14831da177e4SLinus Torvalds else 14848e09f215SStefan Weinhuber return dasd_eckd_end_analysis(block); 14851da177e4SLinus Torvalds } 14861da177e4SLinus Torvalds 14878e09f215SStefan Weinhuber static int dasd_eckd_ready_to_online(struct dasd_device *device) 14888e09f215SStefan Weinhuber { 14898e09f215SStefan Weinhuber return dasd_alias_add_device(device); 14908e09f215SStefan Weinhuber }; 14918e09f215SStefan Weinhuber 14928e09f215SStefan Weinhuber static int dasd_eckd_online_to_ready(struct dasd_device *device) 14938e09f215SStefan Weinhuber { 1494501183f2SStefan Haberland cancel_work_sync(&device->reload_device); 14958e09f215SStefan Weinhuber return dasd_alias_remove_device(device); 14968e09f215SStefan Weinhuber }; 14978e09f215SStefan Weinhuber 14981da177e4SLinus Torvalds static int 14998e09f215SStefan Weinhuber dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 15001da177e4SLinus Torvalds { 15011da177e4SLinus Torvalds struct dasd_eckd_private *private; 15021da177e4SLinus Torvalds 15038e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 15048e09f215SStefan Weinhuber if (dasd_check_blocksize(block->bp_block) == 0) { 15051da177e4SLinus Torvalds geo->sectors = recs_per_track(&private->rdc_data, 15068e09f215SStefan Weinhuber 0, block->bp_block); 15071da177e4SLinus Torvalds } 15081da177e4SLinus Torvalds geo->cylinders = private->rdc_data.no_cyl; 15091da177e4SLinus Torvalds geo->heads = private->rdc_data.trk_per_cyl; 15101da177e4SLinus Torvalds return 0; 15111da177e4SLinus Torvalds } 15121da177e4SLinus Torvalds 15131da177e4SLinus Torvalds static struct dasd_ccw_req * 15141da177e4SLinus Torvalds dasd_eckd_format_device(struct dasd_device * device, 15151da177e4SLinus Torvalds struct format_data_t * fdata) 15161da177e4SLinus Torvalds { 15171da177e4SLinus Torvalds struct dasd_eckd_private *private; 15181da177e4SLinus Torvalds struct dasd_ccw_req *fcp; 15191da177e4SLinus Torvalds struct eckd_count *ect; 15201da177e4SLinus Torvalds struct ccw1 *ccw; 15211da177e4SLinus Torvalds void *data; 1522b44b0ab3SStefan Weinhuber int rpt; 1523b44b0ab3SStefan Weinhuber struct ch_t address; 15241da177e4SLinus Torvalds int cplength, datasize; 15251da177e4SLinus Torvalds int i; 1526f9a28f7bSJean-Baptiste Joret int intensity = 0; 1527f9a28f7bSJean-Baptiste Joret int r0_perm; 15281da177e4SLinus Torvalds 15291da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 15301da177e4SLinus Torvalds rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize); 1531b44b0ab3SStefan Weinhuber set_ch_t(&address, 1532b44b0ab3SStefan Weinhuber fdata->start_unit / private->rdc_data.trk_per_cyl, 1533b44b0ab3SStefan Weinhuber fdata->start_unit % private->rdc_data.trk_per_cyl); 15341da177e4SLinus Torvalds 15351da177e4SLinus Torvalds /* Sanity checks. */ 15361da177e4SLinus Torvalds if (fdata->start_unit >= 1537b44b0ab3SStefan Weinhuber (private->real_cyl * private->rdc_data.trk_per_cyl)) { 1538fc19f381SStefan Haberland dev_warn(&device->cdev->dev, "Start track number %d used in " 1539fc19f381SStefan Haberland "formatting is too big\n", fdata->start_unit); 15401da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 15411da177e4SLinus Torvalds } 15421da177e4SLinus Torvalds if (fdata->start_unit > fdata->stop_unit) { 1543fc19f381SStefan Haberland dev_warn(&device->cdev->dev, "Start track %d used in " 1544fc19f381SStefan Haberland "formatting exceeds end track\n", fdata->start_unit); 15451da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 15461da177e4SLinus Torvalds } 15471da177e4SLinus Torvalds if (dasd_check_blocksize(fdata->blksize) != 0) { 1548fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1549fc19f381SStefan Haberland "The DASD cannot be formatted with block size %d\n", 15501da177e4SLinus Torvalds fdata->blksize); 15511da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 15521da177e4SLinus Torvalds } 15531da177e4SLinus Torvalds 15541da177e4SLinus Torvalds /* 15551da177e4SLinus Torvalds * fdata->intensity is a bit string that tells us what to do: 15561da177e4SLinus Torvalds * Bit 0: write record zero 15571da177e4SLinus Torvalds * Bit 1: write home address, currently not supported 15581da177e4SLinus Torvalds * Bit 2: invalidate tracks 15591da177e4SLinus Torvalds * Bit 3: use OS/390 compatible disk layout (cdl) 1560f9a28f7bSJean-Baptiste Joret * Bit 4: do not allow storage subsystem to modify record zero 15611da177e4SLinus Torvalds * Only some bit combinations do make sense. 15621da177e4SLinus Torvalds */ 1563f9a28f7bSJean-Baptiste Joret if (fdata->intensity & 0x10) { 1564f9a28f7bSJean-Baptiste Joret r0_perm = 0; 1565f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity & ~0x10; 1566f9a28f7bSJean-Baptiste Joret } else { 1567f9a28f7bSJean-Baptiste Joret r0_perm = 1; 1568f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity; 1569f9a28f7bSJean-Baptiste Joret } 1570f9a28f7bSJean-Baptiste Joret switch (intensity) { 15711da177e4SLinus Torvalds case 0x00: /* Normal format */ 15721da177e4SLinus Torvalds case 0x08: /* Normal format, use cdl. */ 15731da177e4SLinus Torvalds cplength = 2 + rpt; 15741da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 15751da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 15761da177e4SLinus Torvalds rpt * sizeof(struct eckd_count); 15771da177e4SLinus Torvalds break; 15781da177e4SLinus Torvalds case 0x01: /* Write record zero and format track. */ 15791da177e4SLinus Torvalds case 0x09: /* Write record zero and format track, use cdl. */ 15801da177e4SLinus Torvalds cplength = 3 + rpt; 15811da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 15821da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 15831da177e4SLinus Torvalds sizeof(struct eckd_count) + 15841da177e4SLinus Torvalds rpt * sizeof(struct eckd_count); 15851da177e4SLinus Torvalds break; 15861da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 15871da177e4SLinus Torvalds case 0x0c: /* Invalidate track, use cdl. */ 15881da177e4SLinus Torvalds cplength = 3; 15891da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 15901da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 15911da177e4SLinus Torvalds sizeof(struct eckd_count); 15921da177e4SLinus Torvalds break; 15931da177e4SLinus Torvalds default: 1594fc19f381SStefan Haberland dev_warn(&device->cdev->dev, "An I/O control call used " 1595fc19f381SStefan Haberland "incorrect flags 0x%x\n", fdata->intensity); 15961da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 15971da177e4SLinus Torvalds } 15981da177e4SLinus Torvalds /* Allocate the format ccw request. */ 159968b781feSStefan Haberland fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 16001da177e4SLinus Torvalds if (IS_ERR(fcp)) 16011da177e4SLinus Torvalds return fcp; 16021da177e4SLinus Torvalds 16031da177e4SLinus Torvalds data = fcp->data; 16041da177e4SLinus Torvalds ccw = fcp->cpaddr; 16051da177e4SLinus Torvalds 1606f9a28f7bSJean-Baptiste Joret switch (intensity & ~0x08) { 16071da177e4SLinus Torvalds case 0x00: /* Normal format. */ 16081da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 16091da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 16101da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device); 1611f9a28f7bSJean-Baptiste Joret /* grant subsystem permission to format R0 */ 1612f9a28f7bSJean-Baptiste Joret if (r0_perm) 1613f9a28f7bSJean-Baptiste Joret ((struct DE_eckd_data *)data)->ga_extended |= 0x04; 16141da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 16151da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 16161da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 16171da177e4SLinus Torvalds fdata->start_unit, 0, rpt, 16181da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device, 16191da177e4SLinus Torvalds fdata->blksize); 16201da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 16211da177e4SLinus Torvalds break; 16221da177e4SLinus Torvalds case 0x01: /* Write record zero + format track. */ 16231da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 16241da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 16251da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, 16261da177e4SLinus Torvalds device); 16271da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 16281da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 16291da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 16301da177e4SLinus Torvalds fdata->start_unit, 0, rpt + 1, 16311da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, device, 16328e09f215SStefan Weinhuber device->block->bp_block); 16331da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 16341da177e4SLinus Torvalds break; 16351da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 16361da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 16371da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 16381da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device); 16391da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 16401da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 16411da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 16421da177e4SLinus Torvalds fdata->start_unit, 0, 1, 16431da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device, 8); 16441da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 16451da177e4SLinus Torvalds break; 16461da177e4SLinus Torvalds } 1647f9a28f7bSJean-Baptiste Joret if (intensity & 0x01) { /* write record zero */ 16481da177e4SLinus Torvalds ect = (struct eckd_count *) data; 16491da177e4SLinus Torvalds data += sizeof(struct eckd_count); 1650b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 1651b44b0ab3SStefan Weinhuber ect->head = address.head; 16521da177e4SLinus Torvalds ect->record = 0; 16531da177e4SLinus Torvalds ect->kl = 0; 16541da177e4SLinus Torvalds ect->dl = 8; 16551da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 16561da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 16571da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 16581da177e4SLinus Torvalds ccw->count = 8; 16591da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 16601da177e4SLinus Torvalds ccw++; 16611da177e4SLinus Torvalds } 1662f9a28f7bSJean-Baptiste Joret if ((intensity & ~0x08) & 0x04) { /* erase track */ 16631da177e4SLinus Torvalds ect = (struct eckd_count *) data; 16641da177e4SLinus Torvalds data += sizeof(struct eckd_count); 1665b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 1666b44b0ab3SStefan Weinhuber ect->head = address.head; 16671da177e4SLinus Torvalds ect->record = 1; 16681da177e4SLinus Torvalds ect->kl = 0; 16691da177e4SLinus Torvalds ect->dl = 0; 16701da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 16711da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 16721da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 16731da177e4SLinus Torvalds ccw->count = 8; 16741da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 16751da177e4SLinus Torvalds } else { /* write remaining records */ 16761da177e4SLinus Torvalds for (i = 0; i < rpt; i++) { 16771da177e4SLinus Torvalds ect = (struct eckd_count *) data; 16781da177e4SLinus Torvalds data += sizeof(struct eckd_count); 1679b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 1680b44b0ab3SStefan Weinhuber ect->head = address.head; 16811da177e4SLinus Torvalds ect->record = i + 1; 16821da177e4SLinus Torvalds ect->kl = 0; 16831da177e4SLinus Torvalds ect->dl = fdata->blksize; 16841da177e4SLinus Torvalds /* Check for special tracks 0-1 when formatting CDL */ 1685f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 16861da177e4SLinus Torvalds fdata->start_unit == 0) { 16871da177e4SLinus Torvalds if (i < 3) { 16881da177e4SLinus Torvalds ect->kl = 4; 16891da177e4SLinus Torvalds ect->dl = sizes_trk0[i] - 4; 16901da177e4SLinus Torvalds } 16911da177e4SLinus Torvalds } 1692f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 16931da177e4SLinus Torvalds fdata->start_unit == 1) { 16941da177e4SLinus Torvalds ect->kl = 44; 16951da177e4SLinus Torvalds ect->dl = LABEL_SIZE - 44; 16961da177e4SLinus Torvalds } 16971da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 16981da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 16991da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 17001da177e4SLinus Torvalds ccw->count = 8; 17011da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 17021da177e4SLinus Torvalds ccw++; 17031da177e4SLinus Torvalds } 17041da177e4SLinus Torvalds } 17058e09f215SStefan Weinhuber fcp->startdev = device; 17068e09f215SStefan Weinhuber fcp->memdev = device; 1707eb6e199bSStefan Weinhuber fcp->retries = 256; 17081da177e4SLinus Torvalds fcp->buildclk = get_clock(); 17091da177e4SLinus Torvalds fcp->status = DASD_CQR_FILLED; 17101da177e4SLinus Torvalds return fcp; 17111da177e4SLinus Torvalds } 17121da177e4SLinus Torvalds 17138e09f215SStefan Weinhuber static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 17141da177e4SLinus Torvalds { 17158e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 17168e09f215SStefan Weinhuber if (cqr->block && (cqr->startdev != cqr->block->base)) { 17178e09f215SStefan Weinhuber dasd_eckd_reset_ccw_to_base_io(cqr); 17188e09f215SStefan Weinhuber cqr->startdev = cqr->block->base; 17191da177e4SLinus Torvalds } 17208e09f215SStefan Weinhuber }; 17211da177e4SLinus Torvalds 17221da177e4SLinus Torvalds static dasd_erp_fn_t 17231da177e4SLinus Torvalds dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 17241da177e4SLinus Torvalds { 17258e09f215SStefan Weinhuber struct dasd_device *device = (struct dasd_device *) cqr->startdev; 17261da177e4SLinus Torvalds struct ccw_device *cdev = device->cdev; 17271da177e4SLinus Torvalds 17281da177e4SLinus Torvalds switch (cdev->id.cu_type) { 17291da177e4SLinus Torvalds case 0x3990: 17301da177e4SLinus Torvalds case 0x2105: 17311da177e4SLinus Torvalds case 0x2107: 17321da177e4SLinus Torvalds case 0x1750: 17331da177e4SLinus Torvalds return dasd_3990_erp_action; 17341da177e4SLinus Torvalds case 0x9343: 17351da177e4SLinus Torvalds case 0x3880: 17361da177e4SLinus Torvalds default: 17371da177e4SLinus Torvalds return dasd_default_erp_action; 17381da177e4SLinus Torvalds } 17391da177e4SLinus Torvalds } 17401da177e4SLinus Torvalds 17411da177e4SLinus Torvalds static dasd_erp_fn_t 17421da177e4SLinus Torvalds dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 17431da177e4SLinus Torvalds { 17441da177e4SLinus Torvalds return dasd_default_erp_postaction; 17451da177e4SLinus Torvalds } 17461da177e4SLinus Torvalds 17478e09f215SStefan Weinhuber 17488e09f215SStefan Weinhuber static void dasd_eckd_handle_unsolicited_interrupt(struct dasd_device *device, 17498e09f215SStefan Weinhuber struct irb *irb) 17508e09f215SStefan Weinhuber { 17518e09f215SStefan Weinhuber char mask; 1752f3eb5384SStefan Weinhuber char *sense = NULL; 1753501183f2SStefan Haberland struct dasd_eckd_private *private; 17548e09f215SStefan Weinhuber 1755501183f2SStefan Haberland private = (struct dasd_eckd_private *) device->private; 17568e09f215SStefan Weinhuber /* first of all check for state change pending interrupt */ 17578e09f215SStefan Weinhuber mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 1758f3eb5384SStefan Weinhuber if ((scsw_dstat(&irb->scsw) & mask) == mask) { 1759501183f2SStefan Haberland /* for alias only and not in offline processing*/ 1760501183f2SStefan Haberland if (!device->block && private->lcu && 1761501183f2SStefan Haberland !test_bit(DASD_FLAG_OFFLINE, &device->flags)) { 1762501183f2SStefan Haberland /* 1763501183f2SStefan Haberland * the state change could be caused by an alias 1764501183f2SStefan Haberland * reassignment remove device from alias handling 1765501183f2SStefan Haberland * to prevent new requests from being scheduled on 1766501183f2SStefan Haberland * the wrong alias device 1767501183f2SStefan Haberland */ 1768501183f2SStefan Haberland dasd_alias_remove_device(device); 1769501183f2SStefan Haberland 1770501183f2SStefan Haberland /* schedule worker to reload device */ 1771501183f2SStefan Haberland dasd_reload_device(device); 1772501183f2SStefan Haberland } 1773501183f2SStefan Haberland 17748e09f215SStefan Weinhuber dasd_generic_handle_state_change(device); 17758e09f215SStefan Weinhuber return; 17768e09f215SStefan Weinhuber } 17778e09f215SStefan Weinhuber 17788e09f215SStefan Weinhuber /* summary unit check */ 1779f3eb5384SStefan Weinhuber if ((scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && 178023d805b6SPeter Oberparleiter (irb->ecw[7] == 0x0D)) { 17818e09f215SStefan Weinhuber dasd_alias_handle_summary_unit_check(device, irb); 17828e09f215SStefan Weinhuber return; 17838e09f215SStefan Weinhuber } 17848e09f215SStefan Weinhuber 1785f3eb5384SStefan Weinhuber sense = dasd_get_sense(irb); 1786f60c768cSStefan Haberland /* service information message SIM */ 1787f3eb5384SStefan Weinhuber if (sense && !(sense[27] & DASD_SENSE_BIT_0) && 1788f3eb5384SStefan Weinhuber ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 1789f3eb5384SStefan Weinhuber dasd_3990_erp_handle_sim(device, sense); 17909d853cafSStefan Haberland dasd_schedule_device_bh(device); 1791f60c768cSStefan Haberland return; 1792f60c768cSStefan Haberland } 1793f60c768cSStefan Haberland 1794f3eb5384SStefan Weinhuber if ((scsw_cc(&irb->scsw) == 1) && 1795f3eb5384SStefan Weinhuber (scsw_fctl(&irb->scsw) & SCSW_FCTL_START_FUNC) && 1796f3eb5384SStefan Weinhuber (scsw_actl(&irb->scsw) & SCSW_ACTL_START_PEND) && 1797f3eb5384SStefan Weinhuber (scsw_stctl(&irb->scsw) & SCSW_STCTL_STATUS_PEND)) { 1798ada3df91SStefan Haberland /* fake irb do nothing, they are handled elsewhere */ 17998e09f215SStefan Weinhuber dasd_schedule_device_bh(device); 1800ada3df91SStefan Haberland return; 1801ada3df91SStefan Haberland } 18028e09f215SStefan Weinhuber 1803f3eb5384SStefan Weinhuber if (!sense) { 1804ada3df91SStefan Haberland /* just report other unsolicited interrupts */ 1805fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_ERR, device, "%s", 1806ada3df91SStefan Haberland "unsolicited interrupt received"); 1807ada3df91SStefan Haberland } else { 1808fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_ERR, device, "%s", 1809ada3df91SStefan Haberland "unsolicited interrupt received " 1810ada3df91SStefan Haberland "(sense available)"); 1811aeec92caSStefan Haberland device->discipline->dump_sense_dbf(device, irb, "unsolicited"); 1812ada3df91SStefan Haberland } 1813ada3df91SStefan Haberland 1814ada3df91SStefan Haberland dasd_schedule_device_bh(device); 18158e09f215SStefan Weinhuber return; 18168e09f215SStefan Weinhuber }; 18178e09f215SStefan Weinhuber 1818f3eb5384SStefan Weinhuber 1819f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( 1820f3eb5384SStefan Weinhuber struct dasd_device *startdev, 18218e09f215SStefan Weinhuber struct dasd_block *block, 1822f3eb5384SStefan Weinhuber struct request *req, 1823f3eb5384SStefan Weinhuber sector_t first_rec, 1824f3eb5384SStefan Weinhuber sector_t last_rec, 1825f3eb5384SStefan Weinhuber sector_t first_trk, 1826f3eb5384SStefan Weinhuber sector_t last_trk, 1827f3eb5384SStefan Weinhuber unsigned int first_offs, 1828f3eb5384SStefan Weinhuber unsigned int last_offs, 1829f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 1830f3eb5384SStefan Weinhuber unsigned int blksize) 18311da177e4SLinus Torvalds { 18321da177e4SLinus Torvalds struct dasd_eckd_private *private; 18331da177e4SLinus Torvalds unsigned long *idaws; 18341da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 18351da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 18361da177e4SLinus Torvalds struct ccw1 *ccw; 18375705f702SNeilBrown struct req_iterator iter; 18381da177e4SLinus Torvalds struct bio_vec *bv; 18391da177e4SLinus Torvalds char *dst; 1840f3eb5384SStefan Weinhuber unsigned int off; 18411da177e4SLinus Torvalds int count, cidaw, cplength, datasize; 1842f3eb5384SStefan Weinhuber sector_t recid; 18431da177e4SLinus Torvalds unsigned char cmd, rcmd; 18448e09f215SStefan Weinhuber int use_prefix; 18458e09f215SStefan Weinhuber struct dasd_device *basedev; 18461da177e4SLinus Torvalds 18478e09f215SStefan Weinhuber basedev = block->base; 18488e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 18491da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 18501da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_READ_MT; 18511da177e4SLinus Torvalds else if (rq_data_dir(req) == WRITE) 18521da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_WRITE_MT; 18531da177e4SLinus Torvalds else 18541da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 1855f3eb5384SStefan Weinhuber 18561da177e4SLinus Torvalds /* Check struct bio and count the number of blocks for the request. */ 18571da177e4SLinus Torvalds count = 0; 18581da177e4SLinus Torvalds cidaw = 0; 18595705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 18601da177e4SLinus Torvalds if (bv->bv_len & (blksize - 1)) 18611da177e4SLinus Torvalds /* Eckd can only do full blocks. */ 18621da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 18638e09f215SStefan Weinhuber count += bv->bv_len >> (block->s2b_shift + 9); 1864347a8dc3SMartin Schwidefsky #if defined(CONFIG_64BIT) 18656c92e699SJens Axboe if (idal_is_needed (page_address(bv->bv_page), bv->bv_len)) 18668e09f215SStefan Weinhuber cidaw += bv->bv_len >> (block->s2b_shift + 9); 18671da177e4SLinus Torvalds #endif 18681da177e4SLinus Torvalds } 18691da177e4SLinus Torvalds /* Paranoia. */ 18701da177e4SLinus Torvalds if (count != last_rec - first_rec + 1) 18711da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 18728e09f215SStefan Weinhuber 18738e09f215SStefan Weinhuber /* use the prefix command if available */ 18748e09f215SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 18758e09f215SStefan Weinhuber if (use_prefix) { 18768e09f215SStefan Weinhuber /* 1x prefix + number of blocks */ 18778e09f215SStefan Weinhuber cplength = 2 + count; 18788e09f215SStefan Weinhuber /* 1x prefix + cidaws*sizeof(long) */ 18798e09f215SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 18808e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 18818e09f215SStefan Weinhuber cidaw * sizeof(unsigned long); 18828e09f215SStefan Weinhuber } else { 18831da177e4SLinus Torvalds /* 1x define extent + 1x locate record + number of blocks */ 18841da177e4SLinus Torvalds cplength = 2 + count; 18851da177e4SLinus Torvalds /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 18868e09f215SStefan Weinhuber datasize = sizeof(struct DE_eckd_data) + 18878e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 18881da177e4SLinus Torvalds cidaw * sizeof(unsigned long); 18898e09f215SStefan Weinhuber } 18901da177e4SLinus Torvalds /* Find out the number of additional locate record ccws for cdl. */ 18911da177e4SLinus Torvalds if (private->uses_cdl && first_rec < 2*blk_per_trk) { 18921da177e4SLinus Torvalds if (last_rec >= 2*blk_per_trk) 18931da177e4SLinus Torvalds count = 2*blk_per_trk - first_rec; 18941da177e4SLinus Torvalds cplength += count; 18951da177e4SLinus Torvalds datasize += count*sizeof(struct LO_eckd_data); 18961da177e4SLinus Torvalds } 18971da177e4SLinus Torvalds /* Allocate the ccw request. */ 189868b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 189968b781feSStefan Haberland startdev); 19001da177e4SLinus Torvalds if (IS_ERR(cqr)) 19011da177e4SLinus Torvalds return cqr; 19021da177e4SLinus Torvalds ccw = cqr->cpaddr; 19038e09f215SStefan Weinhuber /* First ccw is define extent or prefix. */ 19048e09f215SStefan Weinhuber if (use_prefix) { 19058e09f215SStefan Weinhuber if (prefix(ccw++, cqr->data, first_trk, 19068e09f215SStefan Weinhuber last_trk, cmd, basedev, startdev) == -EAGAIN) { 19078e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 19088e09f215SStefan Weinhuber * Try again later. 19098e09f215SStefan Weinhuber */ 19108e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 1911d54853efSMartin Schwidefsky return ERR_PTR(-EAGAIN); 1912d54853efSMartin Schwidefsky } 19138e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 19148e09f215SStefan Weinhuber sizeof(struct PFX_eckd_data)); 19158e09f215SStefan Weinhuber } else { 19168e09f215SStefan Weinhuber if (define_extent(ccw++, cqr->data, first_trk, 19178e09f215SStefan Weinhuber last_trk, cmd, startdev) == -EAGAIN) { 19188e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 19198e09f215SStefan Weinhuber * Try again later. 19208e09f215SStefan Weinhuber */ 19218e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 19228e09f215SStefan Weinhuber return ERR_PTR(-EAGAIN); 19238e09f215SStefan Weinhuber } 19248e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 19258e09f215SStefan Weinhuber sizeof(struct DE_eckd_data)); 19268e09f215SStefan Weinhuber } 19271da177e4SLinus Torvalds /* Build locate_record+read/write/ccws. */ 19281da177e4SLinus Torvalds LO_data = (struct LO_eckd_data *) (idaws + cidaw); 19291da177e4SLinus Torvalds recid = first_rec; 19301da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 19311da177e4SLinus Torvalds /* Only standard blocks so there is just one locate record. */ 19321da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 19331da177e4SLinus Torvalds locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 19348e09f215SStefan Weinhuber last_rec - recid + 1, cmd, basedev, blksize); 19351da177e4SLinus Torvalds } 19365705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 19371da177e4SLinus Torvalds dst = page_address(bv->bv_page) + bv->bv_offset; 19381da177e4SLinus Torvalds if (dasd_page_cache) { 19391da177e4SLinus Torvalds char *copy = kmem_cache_alloc(dasd_page_cache, 1940441e143eSChristoph Lameter GFP_DMA | __GFP_NOWARN); 19411da177e4SLinus Torvalds if (copy && rq_data_dir(req) == WRITE) 19421da177e4SLinus Torvalds memcpy(copy + bv->bv_offset, dst, bv->bv_len); 19431da177e4SLinus Torvalds if (copy) 19441da177e4SLinus Torvalds dst = copy + bv->bv_offset; 19451da177e4SLinus Torvalds } 19461da177e4SLinus Torvalds for (off = 0; off < bv->bv_len; off += blksize) { 19471da177e4SLinus Torvalds sector_t trkid = recid; 19481da177e4SLinus Torvalds unsigned int recoffs = sector_div(trkid, blk_per_trk); 19491da177e4SLinus Torvalds rcmd = cmd; 19501da177e4SLinus Torvalds count = blksize; 19511da177e4SLinus Torvalds /* Locate record for cdl special block ? */ 19521da177e4SLinus Torvalds if (private->uses_cdl && recid < 2*blk_per_trk) { 19531da177e4SLinus Torvalds if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 19541da177e4SLinus Torvalds rcmd |= 0x8; 19551da177e4SLinus Torvalds count = dasd_eckd_cdl_reclen(recid); 1956ec5883abSHorst Hummel if (count < blksize && 1957ec5883abSHorst Hummel rq_data_dir(req) == READ) 19581da177e4SLinus Torvalds memset(dst + count, 0xe5, 19591da177e4SLinus Torvalds blksize - count); 19601da177e4SLinus Torvalds } 19611da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 19621da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 19631da177e4SLinus Torvalds trkid, recoffs + 1, 19648e09f215SStefan Weinhuber 1, rcmd, basedev, count); 19651da177e4SLinus Torvalds } 19661da177e4SLinus Torvalds /* Locate record for standard blocks ? */ 19671da177e4SLinus Torvalds if (private->uses_cdl && recid == 2*blk_per_trk) { 19681da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 19691da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 19701da177e4SLinus Torvalds trkid, recoffs + 1, 19711da177e4SLinus Torvalds last_rec - recid + 1, 19728e09f215SStefan Weinhuber cmd, basedev, count); 19731da177e4SLinus Torvalds } 19741da177e4SLinus Torvalds /* Read/write ccw. */ 19751da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 19761da177e4SLinus Torvalds ccw->cmd_code = rcmd; 19771da177e4SLinus Torvalds ccw->count = count; 19781da177e4SLinus Torvalds if (idal_is_needed(dst, blksize)) { 19791da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) idaws; 19801da177e4SLinus Torvalds ccw->flags = CCW_FLAG_IDA; 19811da177e4SLinus Torvalds idaws = idal_create_words(idaws, dst, blksize); 19821da177e4SLinus Torvalds } else { 19831da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) dst; 19841da177e4SLinus Torvalds ccw->flags = 0; 19851da177e4SLinus Torvalds } 19861da177e4SLinus Torvalds ccw++; 19871da177e4SLinus Torvalds dst += blksize; 19881da177e4SLinus Torvalds recid++; 19891da177e4SLinus Torvalds } 19901da177e4SLinus Torvalds } 199113de227bSHolger Smolinski if (blk_noretry_request(req) || 199213de227bSHolger Smolinski block->base->features & DASD_FEATURE_FAILFAST) 19931c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 19948e09f215SStefan Weinhuber cqr->startdev = startdev; 19958e09f215SStefan Weinhuber cqr->memdev = startdev; 19968e09f215SStefan Weinhuber cqr->block = block; 19977c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 19981da177e4SLinus Torvalds cqr->lpm = private->path_data.ppm; 19991da177e4SLinus Torvalds cqr->retries = 256; 20001da177e4SLinus Torvalds cqr->buildclk = get_clock(); 20011da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 20021da177e4SLinus Torvalds return cqr; 20031da177e4SLinus Torvalds } 20041da177e4SLinus Torvalds 2005f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 2006f3eb5384SStefan Weinhuber struct dasd_device *startdev, 2007f3eb5384SStefan Weinhuber struct dasd_block *block, 2008f3eb5384SStefan Weinhuber struct request *req, 2009f3eb5384SStefan Weinhuber sector_t first_rec, 2010f3eb5384SStefan Weinhuber sector_t last_rec, 2011f3eb5384SStefan Weinhuber sector_t first_trk, 2012f3eb5384SStefan Weinhuber sector_t last_trk, 2013f3eb5384SStefan Weinhuber unsigned int first_offs, 2014f3eb5384SStefan Weinhuber unsigned int last_offs, 2015f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 2016f3eb5384SStefan Weinhuber unsigned int blksize) 2017f3eb5384SStefan Weinhuber { 2018f3eb5384SStefan Weinhuber struct dasd_eckd_private *private; 2019f3eb5384SStefan Weinhuber unsigned long *idaws; 2020f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 2021f3eb5384SStefan Weinhuber struct ccw1 *ccw; 2022f3eb5384SStefan Weinhuber struct req_iterator iter; 2023f3eb5384SStefan Weinhuber struct bio_vec *bv; 2024f3eb5384SStefan Weinhuber char *dst, *idaw_dst; 2025f3eb5384SStefan Weinhuber unsigned int cidaw, cplength, datasize; 2026f3eb5384SStefan Weinhuber unsigned int tlf; 2027f3eb5384SStefan Weinhuber sector_t recid; 2028f3eb5384SStefan Weinhuber unsigned char cmd; 2029f3eb5384SStefan Weinhuber struct dasd_device *basedev; 2030f3eb5384SStefan Weinhuber unsigned int trkcount, count, count_to_trk_end; 2031f3eb5384SStefan Weinhuber unsigned int idaw_len, seg_len, part_len, len_to_track_end; 2032f3eb5384SStefan Weinhuber unsigned char new_track, end_idaw; 2033f3eb5384SStefan Weinhuber sector_t trkid; 2034f3eb5384SStefan Weinhuber unsigned int recoffs; 2035f3eb5384SStefan Weinhuber 2036f3eb5384SStefan Weinhuber basedev = block->base; 2037f3eb5384SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 2038f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) 2039f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 2040f3eb5384SStefan Weinhuber else if (rq_data_dir(req) == WRITE) 2041f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 2042f3eb5384SStefan Weinhuber else 2043f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 2044f3eb5384SStefan Weinhuber 2045f3eb5384SStefan Weinhuber /* Track based I/O needs IDAWs for each page, and not just for 2046f3eb5384SStefan Weinhuber * 64 bit addresses. We need additional idals for pages 2047f3eb5384SStefan Weinhuber * that get filled from two tracks, so we use the number 2048f3eb5384SStefan Weinhuber * of records as upper limit. 2049f3eb5384SStefan Weinhuber */ 2050f3eb5384SStefan Weinhuber cidaw = last_rec - first_rec + 1; 2051f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 2052f3eb5384SStefan Weinhuber 2053f3eb5384SStefan Weinhuber /* 1x prefix + one read/write ccw per track */ 2054f3eb5384SStefan Weinhuber cplength = 1 + trkcount; 2055f3eb5384SStefan Weinhuber 2056f3eb5384SStefan Weinhuber /* on 31-bit we need space for two 32 bit addresses per page 2057f3eb5384SStefan Weinhuber * on 64-bit one 64 bit address 2058f3eb5384SStefan Weinhuber */ 2059f3eb5384SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 2060f3eb5384SStefan Weinhuber cidaw * sizeof(unsigned long long); 2061f3eb5384SStefan Weinhuber 2062f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 206368b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 206468b781feSStefan Haberland startdev); 2065f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 2066f3eb5384SStefan Weinhuber return cqr; 2067f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 2068f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 2069f3eb5384SStefan Weinhuber if (first_trk == last_trk) 2070f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 2071f3eb5384SStefan Weinhuber else 2072f3eb5384SStefan Weinhuber tlf = last_offs + 1; 2073f3eb5384SStefan Weinhuber tlf *= blksize; 2074f3eb5384SStefan Weinhuber 2075f3eb5384SStefan Weinhuber if (prefix_LRE(ccw++, cqr->data, first_trk, 2076f3eb5384SStefan Weinhuber last_trk, cmd, basedev, startdev, 2077f3eb5384SStefan Weinhuber 1 /* format */, first_offs + 1, 2078f3eb5384SStefan Weinhuber trkcount, blksize, 2079f3eb5384SStefan Weinhuber tlf) == -EAGAIN) { 2080f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 2081f3eb5384SStefan Weinhuber * Try again later. 2082f3eb5384SStefan Weinhuber */ 2083f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2084f3eb5384SStefan Weinhuber return ERR_PTR(-EAGAIN); 2085f3eb5384SStefan Weinhuber } 2086f3eb5384SStefan Weinhuber 2087f3eb5384SStefan Weinhuber /* 2088f3eb5384SStefan Weinhuber * The translation of request into ccw programs must meet the 2089f3eb5384SStefan Weinhuber * following conditions: 2090f3eb5384SStefan Weinhuber * - all idaws but the first and the last must address full pages 2091f3eb5384SStefan Weinhuber * (or 2K blocks on 31-bit) 2092f3eb5384SStefan Weinhuber * - the scope of a ccw and it's idal ends with the track boundaries 2093f3eb5384SStefan Weinhuber */ 2094f3eb5384SStefan Weinhuber idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); 2095f3eb5384SStefan Weinhuber recid = first_rec; 2096f3eb5384SStefan Weinhuber new_track = 1; 2097f3eb5384SStefan Weinhuber end_idaw = 0; 2098f3eb5384SStefan Weinhuber len_to_track_end = 0; 2099f3eb5384SStefan Weinhuber idaw_dst = 0; 2100f3eb5384SStefan Weinhuber idaw_len = 0; 2101f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 2102f3eb5384SStefan Weinhuber dst = page_address(bv->bv_page) + bv->bv_offset; 2103f3eb5384SStefan Weinhuber seg_len = bv->bv_len; 2104f3eb5384SStefan Weinhuber while (seg_len) { 2105f3eb5384SStefan Weinhuber if (new_track) { 2106f3eb5384SStefan Weinhuber trkid = recid; 2107f3eb5384SStefan Weinhuber recoffs = sector_div(trkid, blk_per_trk); 2108f3eb5384SStefan Weinhuber count_to_trk_end = blk_per_trk - recoffs; 2109f3eb5384SStefan Weinhuber count = min((last_rec - recid + 1), 2110f3eb5384SStefan Weinhuber (sector_t)count_to_trk_end); 2111f3eb5384SStefan Weinhuber len_to_track_end = count * blksize; 2112f3eb5384SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 2113f3eb5384SStefan Weinhuber ccw->cmd_code = cmd; 2114f3eb5384SStefan Weinhuber ccw->count = len_to_track_end; 2115f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 2116f3eb5384SStefan Weinhuber ccw->flags = CCW_FLAG_IDA; 2117f3eb5384SStefan Weinhuber ccw++; 2118f3eb5384SStefan Weinhuber recid += count; 2119f3eb5384SStefan Weinhuber new_track = 0; 212052db45c3SStefan Weinhuber /* first idaw for a ccw may start anywhere */ 212152db45c3SStefan Weinhuber if (!idaw_dst) 212252db45c3SStefan Weinhuber idaw_dst = dst; 2123f3eb5384SStefan Weinhuber } 212452db45c3SStefan Weinhuber /* If we start a new idaw, we must make sure that it 212552db45c3SStefan Weinhuber * starts on an IDA_BLOCK_SIZE boundary. 2126f3eb5384SStefan Weinhuber * If we continue an idaw, we must make sure that the 2127f3eb5384SStefan Weinhuber * current segment begins where the so far accumulated 2128f3eb5384SStefan Weinhuber * idaw ends 2129f3eb5384SStefan Weinhuber */ 213052db45c3SStefan Weinhuber if (!idaw_dst) { 213152db45c3SStefan Weinhuber if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { 213252db45c3SStefan Weinhuber dasd_sfree_request(cqr, startdev); 213352db45c3SStefan Weinhuber return ERR_PTR(-ERANGE); 213452db45c3SStefan Weinhuber } else 2135f3eb5384SStefan Weinhuber idaw_dst = dst; 213652db45c3SStefan Weinhuber } 2137f3eb5384SStefan Weinhuber if ((idaw_dst + idaw_len) != dst) { 2138f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2139f3eb5384SStefan Weinhuber return ERR_PTR(-ERANGE); 2140f3eb5384SStefan Weinhuber } 2141f3eb5384SStefan Weinhuber part_len = min(seg_len, len_to_track_end); 2142f3eb5384SStefan Weinhuber seg_len -= part_len; 2143f3eb5384SStefan Weinhuber dst += part_len; 2144f3eb5384SStefan Weinhuber idaw_len += part_len; 2145f3eb5384SStefan Weinhuber len_to_track_end -= part_len; 2146f3eb5384SStefan Weinhuber /* collected memory area ends on an IDA_BLOCK border, 2147f3eb5384SStefan Weinhuber * -> create an idaw 2148f3eb5384SStefan Weinhuber * idal_create_words will handle cases where idaw_len 2149f3eb5384SStefan Weinhuber * is larger then IDA_BLOCK_SIZE 2150f3eb5384SStefan Weinhuber */ 2151f3eb5384SStefan Weinhuber if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) 2152f3eb5384SStefan Weinhuber end_idaw = 1; 2153f3eb5384SStefan Weinhuber /* We also need to end the idaw at track end */ 2154f3eb5384SStefan Weinhuber if (!len_to_track_end) { 2155f3eb5384SStefan Weinhuber new_track = 1; 2156f3eb5384SStefan Weinhuber end_idaw = 1; 2157f3eb5384SStefan Weinhuber } 2158f3eb5384SStefan Weinhuber if (end_idaw) { 2159f3eb5384SStefan Weinhuber idaws = idal_create_words(idaws, idaw_dst, 2160f3eb5384SStefan Weinhuber idaw_len); 2161f3eb5384SStefan Weinhuber idaw_dst = 0; 2162f3eb5384SStefan Weinhuber idaw_len = 0; 2163f3eb5384SStefan Weinhuber end_idaw = 0; 2164f3eb5384SStefan Weinhuber } 2165f3eb5384SStefan Weinhuber } 2166f3eb5384SStefan Weinhuber } 2167f3eb5384SStefan Weinhuber 2168f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 2169f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 2170f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2171f3eb5384SStefan Weinhuber cqr->startdev = startdev; 2172f3eb5384SStefan Weinhuber cqr->memdev = startdev; 2173f3eb5384SStefan Weinhuber cqr->block = block; 21747c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2175f3eb5384SStefan Weinhuber cqr->lpm = private->path_data.ppm; 2176f3eb5384SStefan Weinhuber cqr->retries = 256; 2177f3eb5384SStefan Weinhuber cqr->buildclk = get_clock(); 2178f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 2179f3eb5384SStefan Weinhuber return cqr; 2180f3eb5384SStefan Weinhuber } 2181f3eb5384SStefan Weinhuber 2182f3eb5384SStefan Weinhuber static int prepare_itcw(struct itcw *itcw, 2183f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 2184f3eb5384SStefan Weinhuber struct dasd_device *basedev, 2185f3eb5384SStefan Weinhuber struct dasd_device *startdev, 2186f3eb5384SStefan Weinhuber unsigned int rec_on_trk, int count, 2187f3eb5384SStefan Weinhuber unsigned int blksize, 2188f3eb5384SStefan Weinhuber unsigned int total_data_size, 2189f3eb5384SStefan Weinhuber unsigned int tlf, 2190f3eb5384SStefan Weinhuber unsigned int blk_per_trk) 2191f3eb5384SStefan Weinhuber { 2192f3eb5384SStefan Weinhuber struct PFX_eckd_data pfxdata; 2193f3eb5384SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 2194f3eb5384SStefan Weinhuber struct DE_eckd_data *dedata; 2195f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 2196f3eb5384SStefan Weinhuber struct dcw *dcw; 2197f3eb5384SStefan Weinhuber 2198f3eb5384SStefan Weinhuber u32 begcyl, endcyl; 2199f3eb5384SStefan Weinhuber u16 heads, beghead, endhead; 2200f3eb5384SStefan Weinhuber u8 pfx_cmd; 2201f3eb5384SStefan Weinhuber 2202f3eb5384SStefan Weinhuber int rc = 0; 2203f3eb5384SStefan Weinhuber int sector = 0; 2204f3eb5384SStefan Weinhuber int dn, d; 2205f3eb5384SStefan Weinhuber 2206f3eb5384SStefan Weinhuber 2207f3eb5384SStefan Weinhuber /* setup prefix data */ 2208f3eb5384SStefan Weinhuber basepriv = (struct dasd_eckd_private *) basedev->private; 2209f3eb5384SStefan Weinhuber startpriv = (struct dasd_eckd_private *) startdev->private; 2210f3eb5384SStefan Weinhuber dedata = &pfxdata.define_extent; 2211f3eb5384SStefan Weinhuber lredata = &pfxdata.locate_record; 2212f3eb5384SStefan Weinhuber 2213f3eb5384SStefan Weinhuber memset(&pfxdata, 0, sizeof(pfxdata)); 2214f3eb5384SStefan Weinhuber pfxdata.format = 1; /* PFX with LRE */ 2215f3eb5384SStefan Weinhuber pfxdata.base_address = basepriv->ned->unit_addr; 2216f3eb5384SStefan Weinhuber pfxdata.base_lss = basepriv->ned->ID; 2217f3eb5384SStefan Weinhuber pfxdata.validity.define_extent = 1; 2218f3eb5384SStefan Weinhuber 2219f3eb5384SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 2220f3eb5384SStefan Weinhuber if (startpriv->uid.type != UA_BASE_DEVICE) { 2221f3eb5384SStefan Weinhuber pfxdata.validity.verify_base = 1; 2222f3eb5384SStefan Weinhuber if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 2223f3eb5384SStefan Weinhuber pfxdata.validity.hyper_pav = 1; 2224f3eb5384SStefan Weinhuber } 2225f3eb5384SStefan Weinhuber 2226f3eb5384SStefan Weinhuber switch (cmd) { 2227f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 2228f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 2229f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 2230f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 2231f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 2232f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 2233f3eb5384SStefan Weinhuber lredata->operation.operation = 0x0C; 2234f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x01; 2235f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX_READ; 2236f3eb5384SStefan Weinhuber break; 2237f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 2238f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 2239f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 2240f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 2241f3eb5384SStefan Weinhuber rc = check_XRC_on_prefix(&pfxdata, basedev); 2242f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 2243f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 2244f3eb5384SStefan Weinhuber lredata->operation.operation = 0x3F; 2245f3eb5384SStefan Weinhuber lredata->extended_operation = 0x23; 2246f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x2; 2247f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX; 2248f3eb5384SStefan Weinhuber break; 2249f3eb5384SStefan Weinhuber default: 2250f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 2251f3eb5384SStefan Weinhuber "prepare itcw, unknown opcode 0x%x", cmd); 2252f3eb5384SStefan Weinhuber BUG(); 2253f3eb5384SStefan Weinhuber break; 2254f3eb5384SStefan Weinhuber } 2255f3eb5384SStefan Weinhuber if (rc) 2256f3eb5384SStefan Weinhuber return rc; 2257f3eb5384SStefan Weinhuber 2258f3eb5384SStefan Weinhuber dedata->attributes.mode = 0x3; /* ECKD */ 2259f3eb5384SStefan Weinhuber 2260f3eb5384SStefan Weinhuber heads = basepriv->rdc_data.trk_per_cyl; 2261f3eb5384SStefan Weinhuber begcyl = trk / heads; 2262f3eb5384SStefan Weinhuber beghead = trk % heads; 2263f3eb5384SStefan Weinhuber endcyl = totrk / heads; 2264f3eb5384SStefan Weinhuber endhead = totrk % heads; 2265f3eb5384SStefan Weinhuber 2266f3eb5384SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 2267f3eb5384SStefan Weinhuber if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 2268f3eb5384SStefan Weinhuber dedata->attributes.operation == DASD_SEQ_ACCESS) { 2269f3eb5384SStefan Weinhuber 2270f3eb5384SStefan Weinhuber if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 2271f3eb5384SStefan Weinhuber endcyl += basepriv->attrib.nr_cyl; 2272f3eb5384SStefan Weinhuber else 2273f3eb5384SStefan Weinhuber endcyl = (basepriv->real_cyl - 1); 2274f3eb5384SStefan Weinhuber } 2275f3eb5384SStefan Weinhuber 2276f3eb5384SStefan Weinhuber set_ch_t(&dedata->beg_ext, begcyl, beghead); 2277f3eb5384SStefan Weinhuber set_ch_t(&dedata->end_ext, endcyl, endhead); 2278f3eb5384SStefan Weinhuber 2279f3eb5384SStefan Weinhuber dedata->ep_format = 0x20; /* records per track is valid */ 2280f3eb5384SStefan Weinhuber dedata->ep_rec_per_track = blk_per_trk; 2281f3eb5384SStefan Weinhuber 2282f3eb5384SStefan Weinhuber if (rec_on_trk) { 2283f3eb5384SStefan Weinhuber switch (basepriv->rdc_data.dev_type) { 2284f3eb5384SStefan Weinhuber case 0x3390: 2285f3eb5384SStefan Weinhuber dn = ceil_quot(blksize + 6, 232); 2286f3eb5384SStefan Weinhuber d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); 2287f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 2288f3eb5384SStefan Weinhuber break; 2289f3eb5384SStefan Weinhuber case 0x3380: 2290f3eb5384SStefan Weinhuber d = 7 + ceil_quot(blksize + 12, 32); 2291f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 2292f3eb5384SStefan Weinhuber break; 2293f3eb5384SStefan Weinhuber } 2294f3eb5384SStefan Weinhuber } 2295f3eb5384SStefan Weinhuber 2296f3eb5384SStefan Weinhuber lredata->auxiliary.length_valid = 1; 2297f3eb5384SStefan Weinhuber lredata->auxiliary.length_scope = 1; 2298f3eb5384SStefan Weinhuber lredata->auxiliary.imbedded_ccw_valid = 1; 2299f3eb5384SStefan Weinhuber lredata->length = tlf; 2300f3eb5384SStefan Weinhuber lredata->imbedded_ccw = cmd; 2301f3eb5384SStefan Weinhuber lredata->count = count; 2302f3eb5384SStefan Weinhuber lredata->sector = sector; 2303f3eb5384SStefan Weinhuber set_ch_t(&lredata->seek_addr, begcyl, beghead); 2304f3eb5384SStefan Weinhuber lredata->search_arg.cyl = lredata->seek_addr.cyl; 2305f3eb5384SStefan Weinhuber lredata->search_arg.head = lredata->seek_addr.head; 2306f3eb5384SStefan Weinhuber lredata->search_arg.record = rec_on_trk; 2307f3eb5384SStefan Weinhuber 2308f3eb5384SStefan Weinhuber dcw = itcw_add_dcw(itcw, pfx_cmd, 0, 2309f3eb5384SStefan Weinhuber &pfxdata, sizeof(pfxdata), total_data_size); 2310f3eb5384SStefan Weinhuber 2311f3eb5384SStefan Weinhuber return rc; 2312f3eb5384SStefan Weinhuber } 2313f3eb5384SStefan Weinhuber 2314f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 2315f3eb5384SStefan Weinhuber struct dasd_device *startdev, 2316f3eb5384SStefan Weinhuber struct dasd_block *block, 2317f3eb5384SStefan Weinhuber struct request *req, 2318f3eb5384SStefan Weinhuber sector_t first_rec, 2319f3eb5384SStefan Weinhuber sector_t last_rec, 2320f3eb5384SStefan Weinhuber sector_t first_trk, 2321f3eb5384SStefan Weinhuber sector_t last_trk, 2322f3eb5384SStefan Weinhuber unsigned int first_offs, 2323f3eb5384SStefan Weinhuber unsigned int last_offs, 2324f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 2325f3eb5384SStefan Weinhuber unsigned int blksize) 2326f3eb5384SStefan Weinhuber { 2327f3eb5384SStefan Weinhuber struct dasd_eckd_private *private; 2328f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 2329f3eb5384SStefan Weinhuber struct req_iterator iter; 2330f3eb5384SStefan Weinhuber struct bio_vec *bv; 2331f3eb5384SStefan Weinhuber char *dst; 2332f3eb5384SStefan Weinhuber unsigned int trkcount, ctidaw; 2333f3eb5384SStefan Weinhuber unsigned char cmd; 2334f3eb5384SStefan Weinhuber struct dasd_device *basedev; 2335f3eb5384SStefan Weinhuber unsigned int tlf; 2336f3eb5384SStefan Weinhuber struct itcw *itcw; 2337f3eb5384SStefan Weinhuber struct tidaw *last_tidaw = NULL; 2338f3eb5384SStefan Weinhuber int itcw_op; 2339f3eb5384SStefan Weinhuber size_t itcw_size; 2340f3eb5384SStefan Weinhuber 2341f3eb5384SStefan Weinhuber basedev = block->base; 2342f3eb5384SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 2343f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) { 2344f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 2345f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_READ; 2346f3eb5384SStefan Weinhuber } else if (rq_data_dir(req) == WRITE) { 2347f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 2348f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_WRITE; 2349f3eb5384SStefan Weinhuber } else 2350f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 2351f3eb5384SStefan Weinhuber 2352f3eb5384SStefan Weinhuber /* trackbased I/O needs address all memory via TIDAWs, 2353f3eb5384SStefan Weinhuber * not just for 64 bit addresses. This allows us to map 2354f3eb5384SStefan Weinhuber * each segment directly to one tidaw. 2355f3eb5384SStefan Weinhuber */ 2356f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 2357f3eb5384SStefan Weinhuber ctidaw = 0; 2358f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 2359f3eb5384SStefan Weinhuber ++ctidaw; 2360f3eb5384SStefan Weinhuber } 2361f3eb5384SStefan Weinhuber 2362f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 2363f3eb5384SStefan Weinhuber itcw_size = itcw_calc_size(0, ctidaw, 0); 236468b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 2365f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 2366f3eb5384SStefan Weinhuber return cqr; 2367f3eb5384SStefan Weinhuber 2368f3eb5384SStefan Weinhuber cqr->cpmode = 1; 2369f3eb5384SStefan Weinhuber cqr->startdev = startdev; 2370f3eb5384SStefan Weinhuber cqr->memdev = startdev; 2371f3eb5384SStefan Weinhuber cqr->block = block; 2372f3eb5384SStefan Weinhuber cqr->expires = 100*HZ; 2373f3eb5384SStefan Weinhuber cqr->buildclk = get_clock(); 2374f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 2375f3eb5384SStefan Weinhuber cqr->retries = 10; 2376f3eb5384SStefan Weinhuber 2377f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 2378f3eb5384SStefan Weinhuber if (first_trk == last_trk) 2379f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 2380f3eb5384SStefan Weinhuber else 2381f3eb5384SStefan Weinhuber tlf = last_offs + 1; 2382f3eb5384SStefan Weinhuber tlf *= blksize; 2383f3eb5384SStefan Weinhuber 2384f3eb5384SStefan Weinhuber itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); 2385f3eb5384SStefan Weinhuber cqr->cpaddr = itcw_get_tcw(itcw); 2386f3eb5384SStefan Weinhuber 2387f3eb5384SStefan Weinhuber if (prepare_itcw(itcw, first_trk, last_trk, 2388f3eb5384SStefan Weinhuber cmd, basedev, startdev, 2389f3eb5384SStefan Weinhuber first_offs + 1, 2390f3eb5384SStefan Weinhuber trkcount, blksize, 2391f3eb5384SStefan Weinhuber (last_rec - first_rec + 1) * blksize, 2392f3eb5384SStefan Weinhuber tlf, blk_per_trk) == -EAGAIN) { 2393f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 2394f3eb5384SStefan Weinhuber * Try again later. 2395f3eb5384SStefan Weinhuber */ 2396f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2397f3eb5384SStefan Weinhuber return ERR_PTR(-EAGAIN); 2398f3eb5384SStefan Weinhuber } 2399f3eb5384SStefan Weinhuber 2400f3eb5384SStefan Weinhuber /* 2401f3eb5384SStefan Weinhuber * A tidaw can address 4k of memory, but must not cross page boundaries 2402f3eb5384SStefan Weinhuber * We can let the block layer handle this by setting 2403f3eb5384SStefan Weinhuber * blk_queue_segment_boundary to page boundaries and 2404f3eb5384SStefan Weinhuber * blk_max_segment_size to page size when setting up the request queue. 2405f3eb5384SStefan Weinhuber */ 2406f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 2407f3eb5384SStefan Weinhuber dst = page_address(bv->bv_page) + bv->bv_offset; 2408f3eb5384SStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, 0x00, dst, bv->bv_len); 2409f3eb5384SStefan Weinhuber if (IS_ERR(last_tidaw)) 2410f3eb5384SStefan Weinhuber return (struct dasd_ccw_req *)last_tidaw; 2411f3eb5384SStefan Weinhuber } 2412f3eb5384SStefan Weinhuber 2413f3eb5384SStefan Weinhuber last_tidaw->flags |= 0x80; 2414f3eb5384SStefan Weinhuber itcw_finalize(itcw); 2415f3eb5384SStefan Weinhuber 2416f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 2417f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 2418f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2419f3eb5384SStefan Weinhuber cqr->startdev = startdev; 2420f3eb5384SStefan Weinhuber cqr->memdev = startdev; 2421f3eb5384SStefan Weinhuber cqr->block = block; 24227c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2423f3eb5384SStefan Weinhuber cqr->lpm = private->path_data.ppm; 2424f3eb5384SStefan Weinhuber cqr->retries = 256; 2425f3eb5384SStefan Weinhuber cqr->buildclk = get_clock(); 2426f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 2427f3eb5384SStefan Weinhuber return cqr; 2428f3eb5384SStefan Weinhuber } 2429f3eb5384SStefan Weinhuber 2430f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 2431f3eb5384SStefan Weinhuber struct dasd_block *block, 2432f3eb5384SStefan Weinhuber struct request *req) 2433f3eb5384SStefan Weinhuber { 2434f3eb5384SStefan Weinhuber int tpm, cmdrtd, cmdwtd; 2435f3eb5384SStefan Weinhuber int use_prefix; 243645b44d76SStefan Weinhuber #if defined(CONFIG_64BIT) 2437f3eb5384SStefan Weinhuber int fcx_in_css, fcx_in_gneq, fcx_in_features; 243845b44d76SStefan Weinhuber #endif 243945b44d76SStefan Weinhuber struct dasd_eckd_private *private; 2440f3eb5384SStefan Weinhuber struct dasd_device *basedev; 2441f3eb5384SStefan Weinhuber sector_t first_rec, last_rec; 2442f3eb5384SStefan Weinhuber sector_t first_trk, last_trk; 2443f3eb5384SStefan Weinhuber unsigned int first_offs, last_offs; 2444f3eb5384SStefan Weinhuber unsigned int blk_per_trk, blksize; 2445f3eb5384SStefan Weinhuber int cdlspecial; 2446f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 2447f3eb5384SStefan Weinhuber 2448f3eb5384SStefan Weinhuber basedev = block->base; 2449f3eb5384SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 2450f3eb5384SStefan Weinhuber 2451f3eb5384SStefan Weinhuber /* Calculate number of blocks/records per track. */ 2452f3eb5384SStefan Weinhuber blksize = block->bp_block; 2453f3eb5384SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 24546fca97a9SStefan Haberland if (blk_per_trk == 0) 24556fca97a9SStefan Haberland return ERR_PTR(-EINVAL); 2456f3eb5384SStefan Weinhuber /* Calculate record id of first and last block. */ 245783096ebfSTejun Heo first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; 2458f3eb5384SStefan Weinhuber first_offs = sector_div(first_trk, blk_per_trk); 2459f3eb5384SStefan Weinhuber last_rec = last_trk = 246083096ebfSTejun Heo (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 2461f3eb5384SStefan Weinhuber last_offs = sector_div(last_trk, blk_per_trk); 2462f3eb5384SStefan Weinhuber cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); 2463f3eb5384SStefan Weinhuber 2464f3eb5384SStefan Weinhuber /* is transport mode supported? */ 246545b44d76SStefan Weinhuber #if defined(CONFIG_64BIT) 2466f3eb5384SStefan Weinhuber fcx_in_css = css_general_characteristics.fcx; 2467f3eb5384SStefan Weinhuber fcx_in_gneq = private->gneq->reserved2[7] & 0x04; 2468f3eb5384SStefan Weinhuber fcx_in_features = private->features.feature[40] & 0x80; 2469f3eb5384SStefan Weinhuber tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; 247045b44d76SStefan Weinhuber #else 247145b44d76SStefan Weinhuber tpm = 0; 247245b44d76SStefan Weinhuber #endif 2473f3eb5384SStefan Weinhuber 2474f3eb5384SStefan Weinhuber /* is read track data and write track data in command mode supported? */ 2475f3eb5384SStefan Weinhuber cmdrtd = private->features.feature[9] & 0x20; 2476f3eb5384SStefan Weinhuber cmdwtd = private->features.feature[12] & 0x40; 2477f3eb5384SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 2478f3eb5384SStefan Weinhuber 2479f3eb5384SStefan Weinhuber cqr = NULL; 2480f3eb5384SStefan Weinhuber if (cdlspecial || dasd_page_cache) { 2481f3eb5384SStefan Weinhuber /* do nothing, just fall through to the cmd mode single case */ 2482f3eb5384SStefan Weinhuber } else if (!dasd_nofcx && tpm && (first_trk == last_trk)) { 2483f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, 2484f3eb5384SStefan Weinhuber first_rec, last_rec, 2485f3eb5384SStefan Weinhuber first_trk, last_trk, 2486f3eb5384SStefan Weinhuber first_offs, last_offs, 2487f3eb5384SStefan Weinhuber blk_per_trk, blksize); 2488f3eb5384SStefan Weinhuber if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN) 2489f3eb5384SStefan Weinhuber cqr = NULL; 2490f3eb5384SStefan Weinhuber } else if (use_prefix && 2491f3eb5384SStefan Weinhuber (((rq_data_dir(req) == READ) && cmdrtd) || 2492f3eb5384SStefan Weinhuber ((rq_data_dir(req) == WRITE) && cmdwtd))) { 2493f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, 2494f3eb5384SStefan Weinhuber first_rec, last_rec, 2495f3eb5384SStefan Weinhuber first_trk, last_trk, 2496f3eb5384SStefan Weinhuber first_offs, last_offs, 2497f3eb5384SStefan Weinhuber blk_per_trk, blksize); 2498f3eb5384SStefan Weinhuber if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN) 2499f3eb5384SStefan Weinhuber cqr = NULL; 2500f3eb5384SStefan Weinhuber } 2501f3eb5384SStefan Weinhuber if (!cqr) 2502f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, 2503f3eb5384SStefan Weinhuber first_rec, last_rec, 2504f3eb5384SStefan Weinhuber first_trk, last_trk, 2505f3eb5384SStefan Weinhuber first_offs, last_offs, 2506f3eb5384SStefan Weinhuber blk_per_trk, blksize); 2507f3eb5384SStefan Weinhuber return cqr; 2508f3eb5384SStefan Weinhuber } 2509f3eb5384SStefan Weinhuber 25101da177e4SLinus Torvalds static int 25111da177e4SLinus Torvalds dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 25121da177e4SLinus Torvalds { 25131da177e4SLinus Torvalds struct dasd_eckd_private *private; 25141da177e4SLinus Torvalds struct ccw1 *ccw; 25155705f702SNeilBrown struct req_iterator iter; 25161da177e4SLinus Torvalds struct bio_vec *bv; 25171da177e4SLinus Torvalds char *dst, *cda; 25181da177e4SLinus Torvalds unsigned int blksize, blk_per_trk, off; 25191da177e4SLinus Torvalds sector_t recid; 25205705f702SNeilBrown int status; 25211da177e4SLinus Torvalds 25221da177e4SLinus Torvalds if (!dasd_page_cache) 25231da177e4SLinus Torvalds goto out; 25248e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) cqr->block->base->private; 25258e09f215SStefan Weinhuber blksize = cqr->block->bp_block; 25261da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 252783096ebfSTejun Heo recid = blk_rq_pos(req) >> cqr->block->s2b_shift; 25281da177e4SLinus Torvalds ccw = cqr->cpaddr; 25291da177e4SLinus Torvalds /* Skip over define extent & locate record. */ 25301da177e4SLinus Torvalds ccw++; 25311da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 25321da177e4SLinus Torvalds ccw++; 25335705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 25341da177e4SLinus Torvalds dst = page_address(bv->bv_page) + bv->bv_offset; 25351da177e4SLinus Torvalds for (off = 0; off < bv->bv_len; off += blksize) { 25361da177e4SLinus Torvalds /* Skip locate record. */ 25371da177e4SLinus Torvalds if (private->uses_cdl && recid <= 2*blk_per_trk) 25381da177e4SLinus Torvalds ccw++; 25391da177e4SLinus Torvalds if (dst) { 25401da177e4SLinus Torvalds if (ccw->flags & CCW_FLAG_IDA) 25411da177e4SLinus Torvalds cda = *((char **)((addr_t) ccw->cda)); 25421da177e4SLinus Torvalds else 25431da177e4SLinus Torvalds cda = (char *)((addr_t) ccw->cda); 25441da177e4SLinus Torvalds if (dst != cda) { 25451da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 25461da177e4SLinus Torvalds memcpy(dst, cda, bv->bv_len); 25471da177e4SLinus Torvalds kmem_cache_free(dasd_page_cache, 25481da177e4SLinus Torvalds (void *)((addr_t)cda & PAGE_MASK)); 25491da177e4SLinus Torvalds } 25501da177e4SLinus Torvalds dst = NULL; 25511da177e4SLinus Torvalds } 25521da177e4SLinus Torvalds ccw++; 25531da177e4SLinus Torvalds recid++; 25541da177e4SLinus Torvalds } 25551da177e4SLinus Torvalds } 25561da177e4SLinus Torvalds out: 25571da177e4SLinus Torvalds status = cqr->status == DASD_CQR_DONE; 25588e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 25591da177e4SLinus Torvalds return status; 25601da177e4SLinus Torvalds } 25611da177e4SLinus Torvalds 25628e09f215SStefan Weinhuber /* 2563f3eb5384SStefan Weinhuber * Modify ccw/tcw in cqr so it can be started on a base device. 25648e09f215SStefan Weinhuber * 25658e09f215SStefan Weinhuber * Note that this is not enough to restart the cqr! 25668e09f215SStefan Weinhuber * Either reset cqr->startdev as well (summary unit check handling) 25678e09f215SStefan Weinhuber * or restart via separate cqr (as in ERP handling). 25688e09f215SStefan Weinhuber */ 25698e09f215SStefan Weinhuber void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 25708e09f215SStefan Weinhuber { 25718e09f215SStefan Weinhuber struct ccw1 *ccw; 25728e09f215SStefan Weinhuber struct PFX_eckd_data *pfxdata; 2573f3eb5384SStefan Weinhuber struct tcw *tcw; 2574f3eb5384SStefan Weinhuber struct tccb *tccb; 2575f3eb5384SStefan Weinhuber struct dcw *dcw; 25768e09f215SStefan Weinhuber 2577f3eb5384SStefan Weinhuber if (cqr->cpmode == 1) { 2578f3eb5384SStefan Weinhuber tcw = cqr->cpaddr; 2579f3eb5384SStefan Weinhuber tccb = tcw_get_tccb(tcw); 2580f3eb5384SStefan Weinhuber dcw = (struct dcw *)&tccb->tca[0]; 2581f3eb5384SStefan Weinhuber pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; 2582f3eb5384SStefan Weinhuber pfxdata->validity.verify_base = 0; 2583f3eb5384SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 2584f3eb5384SStefan Weinhuber } else { 25858e09f215SStefan Weinhuber ccw = cqr->cpaddr; 25868e09f215SStefan Weinhuber pfxdata = cqr->data; 25878e09f215SStefan Weinhuber if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 25888e09f215SStefan Weinhuber pfxdata->validity.verify_base = 0; 25898e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 25908e09f215SStefan Weinhuber } 25918e09f215SStefan Weinhuber } 2592f3eb5384SStefan Weinhuber } 25938e09f215SStefan Weinhuber 25948e09f215SStefan Weinhuber #define DASD_ECKD_CHANQ_MAX_SIZE 4 25958e09f215SStefan Weinhuber 25968e09f215SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 25978e09f215SStefan Weinhuber struct dasd_block *block, 25988e09f215SStefan Weinhuber struct request *req) 25998e09f215SStefan Weinhuber { 26008e09f215SStefan Weinhuber struct dasd_eckd_private *private; 26018e09f215SStefan Weinhuber struct dasd_device *startdev; 26028e09f215SStefan Weinhuber unsigned long flags; 26038e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 26048e09f215SStefan Weinhuber 26058e09f215SStefan Weinhuber startdev = dasd_alias_get_start_dev(base); 26068e09f215SStefan Weinhuber if (!startdev) 26078e09f215SStefan Weinhuber startdev = base; 26088e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) startdev->private; 26098e09f215SStefan Weinhuber if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 26108e09f215SStefan Weinhuber return ERR_PTR(-EBUSY); 26118e09f215SStefan Weinhuber 26128e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 26138e09f215SStefan Weinhuber private->count++; 26148e09f215SStefan Weinhuber cqr = dasd_eckd_build_cp(startdev, block, req); 26158e09f215SStefan Weinhuber if (IS_ERR(cqr)) 26168e09f215SStefan Weinhuber private->count--; 26178e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 26188e09f215SStefan Weinhuber return cqr; 26198e09f215SStefan Weinhuber } 26208e09f215SStefan Weinhuber 26218e09f215SStefan Weinhuber static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 26228e09f215SStefan Weinhuber struct request *req) 26238e09f215SStefan Weinhuber { 26248e09f215SStefan Weinhuber struct dasd_eckd_private *private; 26258e09f215SStefan Weinhuber unsigned long flags; 26268e09f215SStefan Weinhuber 26278e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 26288e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) cqr->memdev->private; 26298e09f215SStefan Weinhuber private->count--; 26308e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 26318e09f215SStefan Weinhuber return dasd_eckd_free_cp(cqr, req); 26328e09f215SStefan Weinhuber } 26338e09f215SStefan Weinhuber 26341da177e4SLinus Torvalds static int 26351da177e4SLinus Torvalds dasd_eckd_fill_info(struct dasd_device * device, 26361da177e4SLinus Torvalds struct dasd_information2_t * info) 26371da177e4SLinus Torvalds { 26381da177e4SLinus Torvalds struct dasd_eckd_private *private; 26391da177e4SLinus Torvalds 26401da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 26411da177e4SLinus Torvalds info->label_block = 2; 26421da177e4SLinus Torvalds info->FBA_layout = private->uses_cdl ? 0 : 1; 26431da177e4SLinus Torvalds info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 26441da177e4SLinus Torvalds info->characteristics_size = sizeof(struct dasd_eckd_characteristics); 26451da177e4SLinus Torvalds memcpy(info->characteristics, &private->rdc_data, 26461da177e4SLinus Torvalds sizeof(struct dasd_eckd_characteristics)); 26474abb08c2SStefan Weinhuber info->confdata_size = min((unsigned long)private->conf_len, 26484abb08c2SStefan Weinhuber sizeof(info->configuration_data)); 26494abb08c2SStefan Weinhuber memcpy(info->configuration_data, private->conf_data, 26504abb08c2SStefan Weinhuber info->confdata_size); 26511da177e4SLinus Torvalds return 0; 26521da177e4SLinus Torvalds } 26531da177e4SLinus Torvalds 26541da177e4SLinus Torvalds /* 26551da177e4SLinus Torvalds * SECTION: ioctl functions for eckd devices. 26561da177e4SLinus Torvalds */ 26571da177e4SLinus Torvalds 26581da177e4SLinus Torvalds /* 26591da177e4SLinus Torvalds * Release device ioctl. 26601da177e4SLinus Torvalds * Buils a channel programm to releases a prior reserved 26611da177e4SLinus Torvalds * (see dasd_eckd_reserve) device. 26621da177e4SLinus Torvalds */ 26631da177e4SLinus Torvalds static int 26641107ccfbSChristoph Hellwig dasd_eckd_release(struct dasd_device *device) 26651da177e4SLinus Torvalds { 26661da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 26671da177e4SLinus Torvalds int rc; 2668f3eb5384SStefan Weinhuber struct ccw1 *ccw; 2669f932bceaSStefan Weinhuber int useglobal; 26701da177e4SLinus Torvalds 26711da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 26721da177e4SLinus Torvalds return -EACCES; 26731da177e4SLinus Torvalds 2674f932bceaSStefan Weinhuber useglobal = 0; 267568b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 26761da177e4SLinus Torvalds if (IS_ERR(cqr)) { 2677f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 2678f932bceaSStefan Weinhuber useglobal = 1; 2679f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 2680f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 2681f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 2682f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 2683f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 2684f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 2685f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 26861da177e4SLinus Torvalds } 2687f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 2688f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RELEASE; 2689f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 2690f3eb5384SStefan Weinhuber ccw->count = 32; 2691f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 26928e09f215SStefan Weinhuber cqr->startdev = device; 26938e09f215SStefan Weinhuber cqr->memdev = device; 26941da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 26951c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2696336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 26971da177e4SLinus Torvalds cqr->expires = 2 * HZ; 26981da177e4SLinus Torvalds cqr->buildclk = get_clock(); 26991da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 27001da177e4SLinus Torvalds 27011da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 27021da177e4SLinus Torvalds 2703f932bceaSStefan Weinhuber if (useglobal) 2704f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 2705f932bceaSStefan Weinhuber else 27068e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 27071da177e4SLinus Torvalds return rc; 27081da177e4SLinus Torvalds } 27091da177e4SLinus Torvalds 27101da177e4SLinus Torvalds /* 27111da177e4SLinus Torvalds * Reserve device ioctl. 27121da177e4SLinus Torvalds * Options are set to 'synchronous wait for interrupt' and 27131da177e4SLinus Torvalds * 'timeout the request'. This leads to a terminate IO if 27141da177e4SLinus Torvalds * the interrupt is outstanding for a certain time. 27151da177e4SLinus Torvalds */ 27161da177e4SLinus Torvalds static int 27171107ccfbSChristoph Hellwig dasd_eckd_reserve(struct dasd_device *device) 27181da177e4SLinus Torvalds { 27191da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 27201da177e4SLinus Torvalds int rc; 2721f3eb5384SStefan Weinhuber struct ccw1 *ccw; 2722f932bceaSStefan Weinhuber int useglobal; 27231da177e4SLinus Torvalds 27241da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 27251da177e4SLinus Torvalds return -EACCES; 27261da177e4SLinus Torvalds 2727f932bceaSStefan Weinhuber useglobal = 0; 272868b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 27291da177e4SLinus Torvalds if (IS_ERR(cqr)) { 2730f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 2731f932bceaSStefan Weinhuber useglobal = 1; 2732f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 2733f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 2734f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 2735f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 2736f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 2737f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 2738f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 27391da177e4SLinus Torvalds } 2740f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 2741f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RESERVE; 2742f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 2743f3eb5384SStefan Weinhuber ccw->count = 32; 2744f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 27458e09f215SStefan Weinhuber cqr->startdev = device; 27468e09f215SStefan Weinhuber cqr->memdev = device; 27471da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 27481c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2749336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 27501da177e4SLinus Torvalds cqr->expires = 2 * HZ; 27511da177e4SLinus Torvalds cqr->buildclk = get_clock(); 27521da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 27531da177e4SLinus Torvalds 27541da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 27551da177e4SLinus Torvalds 2756f932bceaSStefan Weinhuber if (useglobal) 2757f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 2758f932bceaSStefan Weinhuber else 27598e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 27601da177e4SLinus Torvalds return rc; 27611da177e4SLinus Torvalds } 27621da177e4SLinus Torvalds 27631da177e4SLinus Torvalds /* 27641da177e4SLinus Torvalds * Steal lock ioctl - unconditional reserve device. 27651da177e4SLinus Torvalds * Buils a channel programm to break a device's reservation. 27661da177e4SLinus Torvalds * (unconditional reserve) 27671da177e4SLinus Torvalds */ 27681da177e4SLinus Torvalds static int 27691107ccfbSChristoph Hellwig dasd_eckd_steal_lock(struct dasd_device *device) 27701da177e4SLinus Torvalds { 27711da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 27721da177e4SLinus Torvalds int rc; 2773f3eb5384SStefan Weinhuber struct ccw1 *ccw; 2774f932bceaSStefan Weinhuber int useglobal; 27751da177e4SLinus Torvalds 27761da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 27771da177e4SLinus Torvalds return -EACCES; 27781da177e4SLinus Torvalds 2779f932bceaSStefan Weinhuber useglobal = 0; 278068b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 27811da177e4SLinus Torvalds if (IS_ERR(cqr)) { 2782f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 2783f932bceaSStefan Weinhuber useglobal = 1; 2784f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 2785f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 2786f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 2787f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 2788f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 2789f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 2790f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 27911da177e4SLinus Torvalds } 2792f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 2793f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SLCK; 2794f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 2795f3eb5384SStefan Weinhuber ccw->count = 32; 2796f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 27978e09f215SStefan Weinhuber cqr->startdev = device; 27988e09f215SStefan Weinhuber cqr->memdev = device; 27991da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 28001c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2801336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 28021da177e4SLinus Torvalds cqr->expires = 2 * HZ; 28031da177e4SLinus Torvalds cqr->buildclk = get_clock(); 28041da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 28051da177e4SLinus Torvalds 28061da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 28071da177e4SLinus Torvalds 2808f932bceaSStefan Weinhuber if (useglobal) 2809f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 2810f932bceaSStefan Weinhuber else 28118e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 28121da177e4SLinus Torvalds return rc; 28131da177e4SLinus Torvalds } 28141da177e4SLinus Torvalds 28151da177e4SLinus Torvalds /* 28161da177e4SLinus Torvalds * Read performance statistics 28171da177e4SLinus Torvalds */ 28181da177e4SLinus Torvalds static int 28191107ccfbSChristoph Hellwig dasd_eckd_performance(struct dasd_device *device, void __user *argp) 28201da177e4SLinus Torvalds { 28211da177e4SLinus Torvalds struct dasd_psf_prssd_data *prssdp; 28221da177e4SLinus Torvalds struct dasd_rssd_perf_stats_t *stats; 28231da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 28241da177e4SLinus Torvalds struct ccw1 *ccw; 28251da177e4SLinus Torvalds int rc; 28261da177e4SLinus Torvalds 282768b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 28281da177e4SLinus Torvalds (sizeof(struct dasd_psf_prssd_data) + 28291da177e4SLinus Torvalds sizeof(struct dasd_rssd_perf_stats_t)), 28301da177e4SLinus Torvalds device); 28311da177e4SLinus Torvalds if (IS_ERR(cqr)) { 2832fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 28331da177e4SLinus Torvalds "Could not allocate initialization request"); 28341da177e4SLinus Torvalds return PTR_ERR(cqr); 28351da177e4SLinus Torvalds } 28368e09f215SStefan Weinhuber cqr->startdev = device; 28378e09f215SStefan Weinhuber cqr->memdev = device; 28381da177e4SLinus Torvalds cqr->retries = 0; 2839eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 28401da177e4SLinus Torvalds cqr->expires = 10 * HZ; 28411da177e4SLinus Torvalds 28421da177e4SLinus Torvalds /* Prepare for Read Subsystem Data */ 28431da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 28441da177e4SLinus Torvalds memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 28451da177e4SLinus Torvalds prssdp->order = PSF_ORDER_PRSSD; 28465d67d164SJoe Perches prssdp->suborder = 0x01; /* Performance Statistics */ 28471da177e4SLinus Torvalds prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 28481da177e4SLinus Torvalds 28491da177e4SLinus Torvalds ccw = cqr->cpaddr; 28501da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_PSF; 28511da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_psf_prssd_data); 28521da177e4SLinus Torvalds ccw->flags |= CCW_FLAG_CC; 28531da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) prssdp; 28541da177e4SLinus Torvalds 28551da177e4SLinus Torvalds /* Read Subsystem Data - Performance Statistics */ 28561da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 28571da177e4SLinus Torvalds memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 28581da177e4SLinus Torvalds 28591da177e4SLinus Torvalds ccw++; 28601da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_RSSD; 28611da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 28621da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) stats; 28631da177e4SLinus Torvalds 28641da177e4SLinus Torvalds cqr->buildclk = get_clock(); 28651da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 28661da177e4SLinus Torvalds rc = dasd_sleep_on(cqr); 28671da177e4SLinus Torvalds if (rc == 0) { 28681da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 28691da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 28701107ccfbSChristoph Hellwig if (copy_to_user(argp, stats, 28711107ccfbSChristoph Hellwig sizeof(struct dasd_rssd_perf_stats_t))) 28721107ccfbSChristoph Hellwig rc = -EFAULT; 28731da177e4SLinus Torvalds } 28748e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 28751da177e4SLinus Torvalds return rc; 28761da177e4SLinus Torvalds } 28771da177e4SLinus Torvalds 28781da177e4SLinus Torvalds /* 28791da177e4SLinus Torvalds * Get attributes (cache operations) 28801da177e4SLinus Torvalds * Returnes the cache attributes used in Define Extend (DE). 28811da177e4SLinus Torvalds */ 28821da177e4SLinus Torvalds static int 28831107ccfbSChristoph Hellwig dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 28841da177e4SLinus Torvalds { 28851107ccfbSChristoph Hellwig struct dasd_eckd_private *private = 28861107ccfbSChristoph Hellwig (struct dasd_eckd_private *)device->private; 28871107ccfbSChristoph Hellwig struct attrib_data_t attrib = private->attrib; 28881da177e4SLinus Torvalds int rc; 28891da177e4SLinus Torvalds 28901da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 28911da177e4SLinus Torvalds return -EACCES; 28921107ccfbSChristoph Hellwig if (!argp) 28931da177e4SLinus Torvalds return -EINVAL; 28941da177e4SLinus Torvalds 28951107ccfbSChristoph Hellwig rc = 0; 28961107ccfbSChristoph Hellwig if (copy_to_user(argp, (long *) &attrib, 28971107ccfbSChristoph Hellwig sizeof(struct attrib_data_t))) 28981107ccfbSChristoph Hellwig rc = -EFAULT; 28991da177e4SLinus Torvalds 29001da177e4SLinus Torvalds return rc; 29011da177e4SLinus Torvalds } 29021da177e4SLinus Torvalds 29031da177e4SLinus Torvalds /* 29041da177e4SLinus Torvalds * Set attributes (cache operations) 29051da177e4SLinus Torvalds * Stores the attributes for cache operation to be used in Define Extend (DE). 29061da177e4SLinus Torvalds */ 29071da177e4SLinus Torvalds static int 29081107ccfbSChristoph Hellwig dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 29091da177e4SLinus Torvalds { 29101107ccfbSChristoph Hellwig struct dasd_eckd_private *private = 29111107ccfbSChristoph Hellwig (struct dasd_eckd_private *)device->private; 29121da177e4SLinus Torvalds struct attrib_data_t attrib; 29131da177e4SLinus Torvalds 29141da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 29151da177e4SLinus Torvalds return -EACCES; 29161107ccfbSChristoph Hellwig if (!argp) 29171da177e4SLinus Torvalds return -EINVAL; 29181da177e4SLinus Torvalds 29191107ccfbSChristoph Hellwig if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 29201da177e4SLinus Torvalds return -EFAULT; 29211da177e4SLinus Torvalds private->attrib = attrib; 29221da177e4SLinus Torvalds 2923fc19f381SStefan Haberland dev_info(&device->cdev->dev, 2924fc19f381SStefan Haberland "The DASD cache mode was set to %x (%i cylinder prestage)\n", 29251da177e4SLinus Torvalds private->attrib.operation, private->attrib.nr_cyl); 29261da177e4SLinus Torvalds return 0; 29271da177e4SLinus Torvalds } 29281da177e4SLinus Torvalds 2929ab1d848fSNigel Hislop /* 2930ab1d848fSNigel Hislop * Issue syscall I/O to EMC Symmetrix array. 2931ab1d848fSNigel Hislop * CCWs are PSF and RSSD 2932ab1d848fSNigel Hislop */ 2933ab1d848fSNigel Hislop static int dasd_symm_io(struct dasd_device *device, void __user *argp) 2934ab1d848fSNigel Hislop { 2935ab1d848fSNigel Hislop struct dasd_symmio_parms usrparm; 2936ab1d848fSNigel Hislop char *psf_data, *rssd_result; 2937ab1d848fSNigel Hislop struct dasd_ccw_req *cqr; 2938ab1d848fSNigel Hislop struct ccw1 *ccw; 293952898025SNigel Hislop char psf0, psf1; 2940ab1d848fSNigel Hislop int rc; 2941ab1d848fSNigel Hislop 294252898025SNigel Hislop if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) 294352898025SNigel Hislop return -EACCES; 294452898025SNigel Hislop psf0 = psf1 = 0; 294552898025SNigel Hislop 2946ab1d848fSNigel Hislop /* Copy parms from caller */ 2947ab1d848fSNigel Hislop rc = -EFAULT; 2948ab1d848fSNigel Hislop if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 2949ab1d848fSNigel Hislop goto out; 2950f8b06859SHeiko Carstens if (is_compat_task() || sizeof(long) == 4) { 2951ab1d848fSNigel Hislop /* Make sure pointers are sane even on 31 bit. */ 2952ab1d848fSNigel Hislop rc = -EINVAL; 2953f8b06859SHeiko Carstens if ((usrparm.psf_data >> 32) != 0) 2954ab1d848fSNigel Hislop goto out; 2955f8b06859SHeiko Carstens if ((usrparm.rssd_result >> 32) != 0) 2956f8b06859SHeiko Carstens goto out; 2957f8b06859SHeiko Carstens usrparm.psf_data &= 0x7fffffffULL; 2958f8b06859SHeiko Carstens usrparm.rssd_result &= 0x7fffffffULL; 2959ab1d848fSNigel Hislop } 2960ab1d848fSNigel Hislop /* alloc I/O data area */ 2961ab1d848fSNigel Hislop psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 2962ab1d848fSNigel Hislop rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 2963ab1d848fSNigel Hislop if (!psf_data || !rssd_result) { 2964ab1d848fSNigel Hislop rc = -ENOMEM; 2965ab1d848fSNigel Hislop goto out_free; 2966ab1d848fSNigel Hislop } 2967ab1d848fSNigel Hislop 2968ab1d848fSNigel Hislop /* get syscall header from user space */ 2969ab1d848fSNigel Hislop rc = -EFAULT; 2970ab1d848fSNigel Hislop if (copy_from_user(psf_data, 2971ab1d848fSNigel Hislop (void __user *)(unsigned long) usrparm.psf_data, 2972ab1d848fSNigel Hislop usrparm.psf_data_len)) 2973ab1d848fSNigel Hislop goto out_free; 297452898025SNigel Hislop psf0 = psf_data[0]; 297552898025SNigel Hislop psf1 = psf_data[1]; 2976ab1d848fSNigel Hislop 2977ab1d848fSNigel Hislop /* setup CCWs for PSF + RSSD */ 297868b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device); 2979ab1d848fSNigel Hislop if (IS_ERR(cqr)) { 2980fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 2981ab1d848fSNigel Hislop "Could not allocate initialization request"); 2982ab1d848fSNigel Hislop rc = PTR_ERR(cqr); 2983ab1d848fSNigel Hislop goto out_free; 2984ab1d848fSNigel Hislop } 2985ab1d848fSNigel Hislop 2986ab1d848fSNigel Hislop cqr->startdev = device; 2987ab1d848fSNigel Hislop cqr->memdev = device; 2988ab1d848fSNigel Hislop cqr->retries = 3; 2989ab1d848fSNigel Hislop cqr->expires = 10 * HZ; 2990ab1d848fSNigel Hislop cqr->buildclk = get_clock(); 2991ab1d848fSNigel Hislop cqr->status = DASD_CQR_FILLED; 2992ab1d848fSNigel Hislop 2993ab1d848fSNigel Hislop /* Build the ccws */ 2994ab1d848fSNigel Hislop ccw = cqr->cpaddr; 2995ab1d848fSNigel Hislop 2996ab1d848fSNigel Hislop /* PSF ccw */ 2997ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_PSF; 2998ab1d848fSNigel Hislop ccw->count = usrparm.psf_data_len; 2999ab1d848fSNigel Hislop ccw->flags |= CCW_FLAG_CC; 3000ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) psf_data; 3001ab1d848fSNigel Hislop 3002ab1d848fSNigel Hislop ccw++; 3003ab1d848fSNigel Hislop 3004ab1d848fSNigel Hislop /* RSSD ccw */ 3005ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_RSSD; 3006ab1d848fSNigel Hislop ccw->count = usrparm.rssd_result_len; 3007ab1d848fSNigel Hislop ccw->flags = CCW_FLAG_SLI ; 3008ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) rssd_result; 3009ab1d848fSNigel Hislop 3010ab1d848fSNigel Hislop rc = dasd_sleep_on(cqr); 3011ab1d848fSNigel Hislop if (rc) 3012ab1d848fSNigel Hislop goto out_sfree; 3013ab1d848fSNigel Hislop 3014ab1d848fSNigel Hislop rc = -EFAULT; 3015ab1d848fSNigel Hislop if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 3016ab1d848fSNigel Hislop rssd_result, usrparm.rssd_result_len)) 3017ab1d848fSNigel Hislop goto out_sfree; 3018ab1d848fSNigel Hislop rc = 0; 3019ab1d848fSNigel Hislop 3020ab1d848fSNigel Hislop out_sfree: 3021ab1d848fSNigel Hislop dasd_sfree_request(cqr, cqr->memdev); 3022ab1d848fSNigel Hislop out_free: 3023ab1d848fSNigel Hislop kfree(rssd_result); 3024ab1d848fSNigel Hislop kfree(psf_data); 3025ab1d848fSNigel Hislop out: 302652898025SNigel Hislop DBF_DEV_EVENT(DBF_WARNING, device, 302752898025SNigel Hislop "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", 302852898025SNigel Hislop (int) psf0, (int) psf1, rc); 3029ab1d848fSNigel Hislop return rc; 3030ab1d848fSNigel Hislop } 3031ab1d848fSNigel Hislop 30321107ccfbSChristoph Hellwig static int 30338e09f215SStefan Weinhuber dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 30341107ccfbSChristoph Hellwig { 30358e09f215SStefan Weinhuber struct dasd_device *device = block->base; 30368e09f215SStefan Weinhuber 30371107ccfbSChristoph Hellwig switch (cmd) { 30381107ccfbSChristoph Hellwig case BIODASDGATTR: 30391107ccfbSChristoph Hellwig return dasd_eckd_get_attrib(device, argp); 30401107ccfbSChristoph Hellwig case BIODASDSATTR: 30411107ccfbSChristoph Hellwig return dasd_eckd_set_attrib(device, argp); 30421107ccfbSChristoph Hellwig case BIODASDPSRD: 30431107ccfbSChristoph Hellwig return dasd_eckd_performance(device, argp); 30441107ccfbSChristoph Hellwig case BIODASDRLSE: 30451107ccfbSChristoph Hellwig return dasd_eckd_release(device); 30461107ccfbSChristoph Hellwig case BIODASDRSRV: 30471107ccfbSChristoph Hellwig return dasd_eckd_reserve(device); 30481107ccfbSChristoph Hellwig case BIODASDSLCK: 30491107ccfbSChristoph Hellwig return dasd_eckd_steal_lock(device); 3050ab1d848fSNigel Hislop case BIODASDSYMMIO: 3051ab1d848fSNigel Hislop return dasd_symm_io(device, argp); 30521107ccfbSChristoph Hellwig default: 30531107ccfbSChristoph Hellwig return -ENOIOCTLCMD; 30541107ccfbSChristoph Hellwig } 30551107ccfbSChristoph Hellwig } 30561107ccfbSChristoph Hellwig 30571da177e4SLinus Torvalds /* 3058445b5b49SHorst Hummel * Dump the range of CCWs into 'page' buffer 3059445b5b49SHorst Hummel * and return number of printed chars. 3060445b5b49SHorst Hummel */ 30614d284cacSHeiko Carstens static int 3062445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 3063445b5b49SHorst Hummel { 3064445b5b49SHorst Hummel int len, count; 3065445b5b49SHorst Hummel char *datap; 3066445b5b49SHorst Hummel 3067445b5b49SHorst Hummel len = 0; 3068445b5b49SHorst Hummel while (from <= to) { 3069445b5b49SHorst Hummel len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3070445b5b49SHorst Hummel " CCW %p: %08X %08X DAT:", 3071445b5b49SHorst Hummel from, ((int *) from)[0], ((int *) from)[1]); 3072445b5b49SHorst Hummel 3073445b5b49SHorst Hummel /* get pointer to data (consider IDALs) */ 3074445b5b49SHorst Hummel if (from->flags & CCW_FLAG_IDA) 3075445b5b49SHorst Hummel datap = (char *) *((addr_t *) (addr_t) from->cda); 3076445b5b49SHorst Hummel else 3077445b5b49SHorst Hummel datap = (char *) ((addr_t) from->cda); 3078445b5b49SHorst Hummel 3079445b5b49SHorst Hummel /* dump data (max 32 bytes) */ 3080445b5b49SHorst Hummel for (count = 0; count < from->count && count < 32; count++) { 3081445b5b49SHorst Hummel if (count % 8 == 0) len += sprintf(page + len, " "); 3082445b5b49SHorst Hummel if (count % 4 == 0) len += sprintf(page + len, " "); 3083445b5b49SHorst Hummel len += sprintf(page + len, "%02x", datap[count]); 3084445b5b49SHorst Hummel } 3085445b5b49SHorst Hummel len += sprintf(page + len, "\n"); 3086445b5b49SHorst Hummel from++; 3087445b5b49SHorst Hummel } 3088445b5b49SHorst Hummel return len; 3089445b5b49SHorst Hummel } 3090445b5b49SHorst Hummel 3091fc19f381SStefan Haberland static void 3092aeec92caSStefan Haberland dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 3093aeec92caSStefan Haberland char *reason) 3094fc19f381SStefan Haberland { 3095fc19f381SStefan Haberland u64 *sense; 3096fc19f381SStefan Haberland 3097aeec92caSStefan Haberland sense = (u64 *) dasd_get_sense(irb); 3098fc19f381SStefan Haberland if (sense) { 3099fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_EMERG, device, 3100aeec92caSStefan Haberland "%s: %s %02x%02x%02x %016llx %016llx %016llx " 3101aeec92caSStefan Haberland "%016llx", reason, 3102aeec92caSStefan Haberland scsw_is_tm(&irb->scsw) ? "t" : "c", 3103aeec92caSStefan Haberland scsw_cc(&irb->scsw), scsw_cstat(&irb->scsw), 3104aeec92caSStefan Haberland scsw_dstat(&irb->scsw), sense[0], sense[1], 3105aeec92caSStefan Haberland sense[2], sense[3]); 3106fc19f381SStefan Haberland } else { 3107fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_EMERG, device, "%s", 3108fc19f381SStefan Haberland "SORRY - NO VALID SENSE AVAILABLE\n"); 3109fc19f381SStefan Haberland } 3110fc19f381SStefan Haberland } 3111fc19f381SStefan Haberland 3112445b5b49SHorst Hummel /* 31131da177e4SLinus Torvalds * Print sense data and related channel program. 31141da177e4SLinus Torvalds * Parts are printed because printk buffer is only 1024 bytes. 31151da177e4SLinus Torvalds */ 3116f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 31178e09f215SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 31181da177e4SLinus Torvalds { 31191da177e4SLinus Torvalds char *page; 3120445b5b49SHorst Hummel struct ccw1 *first, *last, *fail, *from, *to; 3121445b5b49SHorst Hummel int len, sl, sct; 31221da177e4SLinus Torvalds 31231da177e4SLinus Torvalds page = (char *) get_zeroed_page(GFP_ATOMIC); 31241da177e4SLinus Torvalds if (page == NULL) { 3125fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3126fc19f381SStefan Haberland "No memory to dump sense data\n"); 31271da177e4SLinus Torvalds return; 31281da177e4SLinus Torvalds } 3129445b5b49SHorst Hummel /* dump the sense data */ 31301da177e4SLinus Torvalds len = sprintf(page, KERN_ERR PRINTK_HEADER 31311da177e4SLinus Torvalds " I/O status report for device %s:\n", 31322a0217d5SKay Sievers dev_name(&device->cdev->dev)); 31331da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 31346cc7f168SStefan Weinhuber " in req: %p CS: 0x%02X DS: 0x%02X CC: 0x%02X RC: %d\n", 31356cc7f168SStefan Weinhuber req, scsw_cstat(&irb->scsw), scsw_dstat(&irb->scsw), 3136294001a8SStefan Haberland scsw_cc(&irb->scsw), req ? req->intrc : 0); 31371da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 31381da177e4SLinus Torvalds " device %s: Failing CCW: %p\n", 31392a0217d5SKay Sievers dev_name(&device->cdev->dev), 314023d805b6SPeter Oberparleiter (void *) (addr_t) irb->scsw.cmd.cpa); 31411da177e4SLinus Torvalds if (irb->esw.esw0.erw.cons) { 31421da177e4SLinus Torvalds for (sl = 0; sl < 4; sl++) { 31431da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 31441da177e4SLinus Torvalds " Sense(hex) %2d-%2d:", 31451da177e4SLinus Torvalds (8 * sl), ((8 * sl) + 7)); 31461da177e4SLinus Torvalds 31471da177e4SLinus Torvalds for (sct = 0; sct < 8; sct++) { 31481da177e4SLinus Torvalds len += sprintf(page + len, " %02x", 31491da177e4SLinus Torvalds irb->ecw[8 * sl + sct]); 31501da177e4SLinus Torvalds } 31511da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 31521da177e4SLinus Torvalds } 31531da177e4SLinus Torvalds 31541da177e4SLinus Torvalds if (irb->ecw[27] & DASD_SENSE_BIT_0) { 31551da177e4SLinus Torvalds /* 24 Byte Sense Data */ 3156445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 31571da177e4SLinus Torvalds " 24 Byte: %x MSG %x, " 31581da177e4SLinus Torvalds "%s MSGb to SYSOP\n", 31591da177e4SLinus Torvalds irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 31601da177e4SLinus Torvalds irb->ecw[1] & 0x10 ? "" : "no"); 31611da177e4SLinus Torvalds } else { 31621da177e4SLinus Torvalds /* 32 Byte Sense Data */ 3163445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 31641da177e4SLinus Torvalds " 32 Byte: Format: %x " 31651da177e4SLinus Torvalds "Exception class %x\n", 31661da177e4SLinus Torvalds irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 31671da177e4SLinus Torvalds } 31681da177e4SLinus Torvalds } else { 3169445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 31701da177e4SLinus Torvalds " SORRY - NO VALID SENSE AVAILABLE\n"); 31711da177e4SLinus Torvalds } 3172445b5b49SHorst Hummel printk("%s", page); 31731da177e4SLinus Torvalds 31748e09f215SStefan Weinhuber if (req) { 31758e09f215SStefan Weinhuber /* req == NULL for unsolicited interrupts */ 3176445b5b49SHorst Hummel /* dump the Channel Program (max 140 Bytes per line) */ 3177445b5b49SHorst Hummel /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 3178445b5b49SHorst Hummel first = req->cpaddr; 3179445b5b49SHorst Hummel for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 3180445b5b49SHorst Hummel to = min(first + 6, last); 31811da177e4SLinus Torvalds len = sprintf(page, KERN_ERR PRINTK_HEADER 31821da177e4SLinus Torvalds " Related CP in req: %p\n", req); 3183445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(first, to, page + len); 3184445b5b49SHorst Hummel printk("%s", page); 31851da177e4SLinus Torvalds 3186445b5b49SHorst Hummel /* print failing CCW area (maximum 4) */ 3187445b5b49SHorst Hummel /* scsw->cda is either valid or zero */ 31881da177e4SLinus Torvalds len = 0; 3189445b5b49SHorst Hummel from = ++to; 319023d805b6SPeter Oberparleiter fail = (struct ccw1 *)(addr_t) 319123d805b6SPeter Oberparleiter irb->scsw.cmd.cpa; /* failing CCW */ 3192445b5b49SHorst Hummel if (from < fail - 2) { 3193445b5b49SHorst Hummel from = fail - 2; /* there is a gap - print header */ 3194445b5b49SHorst Hummel len += sprintf(page, KERN_ERR PRINTK_HEADER "......\n"); 31951da177e4SLinus Torvalds } 3196445b5b49SHorst Hummel to = min(fail + 1, last); 3197445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, to, page + len); 31981da177e4SLinus Torvalds 3199445b5b49SHorst Hummel /* print last CCWs (maximum 2) */ 3200445b5b49SHorst Hummel from = max(from, ++to); 3201445b5b49SHorst Hummel if (from < last - 1) { 3202445b5b49SHorst Hummel from = last - 1; /* there is a gap - print header */ 32031da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n"); 32041da177e4SLinus Torvalds } 3205445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, last, page + len); 32061da177e4SLinus Torvalds if (len > 0) 3207445b5b49SHorst Hummel printk("%s", page); 32088e09f215SStefan Weinhuber } 32091da177e4SLinus Torvalds free_page((unsigned long) page); 32101da177e4SLinus Torvalds } 32111da177e4SLinus Torvalds 3212f3eb5384SStefan Weinhuber 3213f3eb5384SStefan Weinhuber /* 3214f3eb5384SStefan Weinhuber * Print sense data from a tcw. 3215f3eb5384SStefan Weinhuber */ 3216f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 3217f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 3218f3eb5384SStefan Weinhuber { 3219f3eb5384SStefan Weinhuber char *page; 3220f3eb5384SStefan Weinhuber int len, sl, sct, residual; 3221f3eb5384SStefan Weinhuber 3222f3eb5384SStefan Weinhuber struct tsb *tsb; 3223f3eb5384SStefan Weinhuber u8 *sense; 3224f3eb5384SStefan Weinhuber 3225f3eb5384SStefan Weinhuber 3226f3eb5384SStefan Weinhuber page = (char *) get_zeroed_page(GFP_ATOMIC); 3227f3eb5384SStefan Weinhuber if (page == NULL) { 3228fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, " %s", 3229f3eb5384SStefan Weinhuber "No memory to dump sense data"); 3230f3eb5384SStefan Weinhuber return; 3231f3eb5384SStefan Weinhuber } 3232f3eb5384SStefan Weinhuber /* dump the sense data */ 3233f3eb5384SStefan Weinhuber len = sprintf(page, KERN_ERR PRINTK_HEADER 3234f3eb5384SStefan Weinhuber " I/O status report for device %s:\n", 3235f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev)); 3236f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 32376cc7f168SStefan Weinhuber " in req: %p CS: 0x%02X DS: 0x%02X CC: 0x%02X RC: %d " 3238f3eb5384SStefan Weinhuber "fcxs: 0x%02X schxs: 0x%02X\n", req, 3239f3eb5384SStefan Weinhuber scsw_cstat(&irb->scsw), scsw_dstat(&irb->scsw), 32406cc7f168SStefan Weinhuber scsw_cc(&irb->scsw), req->intrc, 3241f3eb5384SStefan Weinhuber irb->scsw.tm.fcxs, irb->scsw.tm.schxs); 3242f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3243f3eb5384SStefan Weinhuber " device %s: Failing TCW: %p\n", 3244f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev), 3245f3eb5384SStefan Weinhuber (void *) (addr_t) irb->scsw.tm.tcw); 3246f3eb5384SStefan Weinhuber 3247f3eb5384SStefan Weinhuber tsb = NULL; 3248f3eb5384SStefan Weinhuber sense = NULL; 3249b8fde722SStefan Haberland if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs == 0x01)) 3250f3eb5384SStefan Weinhuber tsb = tcw_get_tsb( 3251f3eb5384SStefan Weinhuber (struct tcw *)(unsigned long)irb->scsw.tm.tcw); 3252f3eb5384SStefan Weinhuber 3253b8fde722SStefan Haberland if (tsb) { 3254f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3255f3eb5384SStefan Weinhuber " tsb->length %d\n", tsb->length); 3256f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3257f3eb5384SStefan Weinhuber " tsb->flags %x\n", tsb->flags); 3258f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3259f3eb5384SStefan Weinhuber " tsb->dcw_offset %d\n", tsb->dcw_offset); 3260f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3261f3eb5384SStefan Weinhuber " tsb->count %d\n", tsb->count); 3262f3eb5384SStefan Weinhuber residual = tsb->count - 28; 3263f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3264f3eb5384SStefan Weinhuber " residual %d\n", residual); 3265f3eb5384SStefan Weinhuber 3266f3eb5384SStefan Weinhuber switch (tsb->flags & 0x07) { 3267f3eb5384SStefan Weinhuber case 1: /* tsa_iostat */ 3268f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3269f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_time %d\n", 3270f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_time); 3271f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3272f3eb5384SStefan Weinhuber " tsb->tsa.iostat.def_time %d\n", 3273f3eb5384SStefan Weinhuber tsb->tsa.iostat.def_time); 3274f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3275f3eb5384SStefan Weinhuber " tsb->tsa.iostat.queue_time %d\n", 3276f3eb5384SStefan Weinhuber tsb->tsa.iostat.queue_time); 3277f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3278f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_busy_time %d\n", 3279f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_busy_time); 3280f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3281f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_act_time %d\n", 3282f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_act_time); 3283f3eb5384SStefan Weinhuber sense = tsb->tsa.iostat.sense; 3284f3eb5384SStefan Weinhuber break; 3285f3eb5384SStefan Weinhuber case 2: /* ts_ddpc */ 3286f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3287f3eb5384SStefan Weinhuber " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); 3288f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3289f3eb5384SStefan Weinhuber " tsb->tsa.ddpc.rcq: "); 3290f3eb5384SStefan Weinhuber for (sl = 0; sl < 16; sl++) { 3291f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 3292f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 3293f3eb5384SStefan Weinhuber tsb->tsa.ddpc.rcq[sl]); 3294f3eb5384SStefan Weinhuber } 3295f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 3296f3eb5384SStefan Weinhuber } 3297f3eb5384SStefan Weinhuber sense = tsb->tsa.ddpc.sense; 3298f3eb5384SStefan Weinhuber break; 3299f3eb5384SStefan Weinhuber case 3: /* tsa_intrg */ 3300f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3301f3eb5384SStefan Weinhuber " tsb->tsa.intrg.: not supportet yet \n"); 3302f3eb5384SStefan Weinhuber break; 3303f3eb5384SStefan Weinhuber } 3304f3eb5384SStefan Weinhuber 3305f3eb5384SStefan Weinhuber if (sense) { 3306f3eb5384SStefan Weinhuber for (sl = 0; sl < 4; sl++) { 3307f3eb5384SStefan Weinhuber len += sprintf(page + len, 3308f3eb5384SStefan Weinhuber KERN_ERR PRINTK_HEADER 3309f3eb5384SStefan Weinhuber " Sense(hex) %2d-%2d:", 3310f3eb5384SStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 3311f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 3312f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 3313f3eb5384SStefan Weinhuber sense[8 * sl + sct]); 3314f3eb5384SStefan Weinhuber } 3315f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 3316f3eb5384SStefan Weinhuber } 3317f3eb5384SStefan Weinhuber 3318f3eb5384SStefan Weinhuber if (sense[27] & DASD_SENSE_BIT_0) { 3319f3eb5384SStefan Weinhuber /* 24 Byte Sense Data */ 3320f3eb5384SStefan Weinhuber sprintf(page + len, KERN_ERR PRINTK_HEADER 3321f3eb5384SStefan Weinhuber " 24 Byte: %x MSG %x, " 3322f3eb5384SStefan Weinhuber "%s MSGb to SYSOP\n", 3323f3eb5384SStefan Weinhuber sense[7] >> 4, sense[7] & 0x0f, 3324f3eb5384SStefan Weinhuber sense[1] & 0x10 ? "" : "no"); 3325f3eb5384SStefan Weinhuber } else { 3326f3eb5384SStefan Weinhuber /* 32 Byte Sense Data */ 3327f3eb5384SStefan Weinhuber sprintf(page + len, KERN_ERR PRINTK_HEADER 3328f3eb5384SStefan Weinhuber " 32 Byte: Format: %x " 3329f3eb5384SStefan Weinhuber "Exception class %x\n", 3330f3eb5384SStefan Weinhuber sense[6] & 0x0f, sense[22] >> 4); 3331f3eb5384SStefan Weinhuber } 3332f3eb5384SStefan Weinhuber } else { 3333f3eb5384SStefan Weinhuber sprintf(page + len, KERN_ERR PRINTK_HEADER 3334f3eb5384SStefan Weinhuber " SORRY - NO VALID SENSE AVAILABLE\n"); 3335f3eb5384SStefan Weinhuber } 3336f3eb5384SStefan Weinhuber } else { 3337f3eb5384SStefan Weinhuber sprintf(page + len, KERN_ERR PRINTK_HEADER 3338f3eb5384SStefan Weinhuber " SORRY - NO TSB DATA AVAILABLE\n"); 3339f3eb5384SStefan Weinhuber } 3340f3eb5384SStefan Weinhuber printk("%s", page); 3341f3eb5384SStefan Weinhuber free_page((unsigned long) page); 3342f3eb5384SStefan Weinhuber } 3343f3eb5384SStefan Weinhuber 3344f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense(struct dasd_device *device, 3345f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 3346f3eb5384SStefan Weinhuber { 3347f3eb5384SStefan Weinhuber if (req && scsw_is_tm(&req->irb.scsw)) 3348f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_tcw(device, req, irb); 3349f3eb5384SStefan Weinhuber else 3350f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_ccw(device, req, irb); 3351f3eb5384SStefan Weinhuber } 3352f3eb5384SStefan Weinhuber 3353501183f2SStefan Haberland static int dasd_eckd_pm_freeze(struct dasd_device *device) 3354d41dd122SStefan Haberland { 3355d41dd122SStefan Haberland /* 3356d41dd122SStefan Haberland * the device should be disconnected from our LCU structure 3357d41dd122SStefan Haberland * on restore we will reconnect it and reread LCU specific 3358d41dd122SStefan Haberland * information like PAV support that might have changed 3359d41dd122SStefan Haberland */ 3360d41dd122SStefan Haberland dasd_alias_remove_device(device); 3361d41dd122SStefan Haberland dasd_alias_disconnect_device_from_lcu(device); 3362d41dd122SStefan Haberland 3363d41dd122SStefan Haberland return 0; 3364d41dd122SStefan Haberland } 3365d41dd122SStefan Haberland 3366501183f2SStefan Haberland static int dasd_eckd_restore_device(struct dasd_device *device) 3367d41dd122SStefan Haberland { 3368d41dd122SStefan Haberland struct dasd_eckd_private *private; 33696fca97a9SStefan Haberland struct dasd_eckd_characteristics temp_rdc_data; 3370d41dd122SStefan Haberland int is_known, rc; 3371d41dd122SStefan Haberland struct dasd_uid temp_uid; 3372a7602f6cSStefan Haberland unsigned long flags; 3373d41dd122SStefan Haberland 3374d41dd122SStefan Haberland private = (struct dasd_eckd_private *) device->private; 3375d41dd122SStefan Haberland 3376d41dd122SStefan Haberland /* Read Configuration Data */ 3377d41dd122SStefan Haberland rc = dasd_eckd_read_conf(device); 3378d41dd122SStefan Haberland if (rc) 3379d41dd122SStefan Haberland goto out_err; 3380d41dd122SStefan Haberland 33812dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 33822dedf0d9SStefan Haberland /* Generate device unique id */ 33832dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 33842dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 3385d41dd122SStefan Haberland if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) 3386a7602f6cSStefan Haberland dev_err(&device->cdev->dev, "The UID of the DASD has " 3387a7602f6cSStefan Haberland "changed\n"); 33882dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 3389d41dd122SStefan Haberland if (rc) 3390d41dd122SStefan Haberland goto out_err; 3391d41dd122SStefan Haberland 3392d41dd122SStefan Haberland /* register lcu with alias handling, enable PAV if this is a new lcu */ 3393d41dd122SStefan Haberland is_known = dasd_alias_make_device_known_to_lcu(device); 3394d41dd122SStefan Haberland if (is_known < 0) 3395d41dd122SStefan Haberland return is_known; 3396d41dd122SStefan Haberland if (!is_known) { 3397f4ac1d02SStefan Weinhuber dasd_eckd_validate_server(device); 3398f4ac1d02SStefan Weinhuber dasd_alias_lcu_setup_complete(device); 3399f4ac1d02SStefan Weinhuber } else 3400f4ac1d02SStefan Weinhuber dasd_alias_wait_for_lcu_setup(device); 3401f4ac1d02SStefan Weinhuber 3402f4ac1d02SStefan Weinhuber /* RE-Read Configuration Data */ 3403f4ac1d02SStefan Weinhuber rc = dasd_eckd_read_conf(device); 3404d41dd122SStefan Haberland if (rc) 3405d41dd122SStefan Haberland goto out_err; 3406d41dd122SStefan Haberland 3407d41dd122SStefan Haberland /* Read Feature Codes */ 340868d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 3409d41dd122SStefan Haberland 3410d41dd122SStefan Haberland /* Read Device Characteristics */ 341168b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 34126fca97a9SStefan Haberland &temp_rdc_data, 64); 3413d41dd122SStefan Haberland if (rc) { 3414b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 3415b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 3416d41dd122SStefan Haberland goto out_err; 3417d41dd122SStefan Haberland } 3418a7602f6cSStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 34196fca97a9SStefan Haberland memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data)); 3420a7602f6cSStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 3421d41dd122SStefan Haberland 3422d41dd122SStefan Haberland /* add device to alias management */ 3423d41dd122SStefan Haberland dasd_alias_add_device(device); 3424d41dd122SStefan Haberland 3425d41dd122SStefan Haberland return 0; 3426d41dd122SStefan Haberland 3427d41dd122SStefan Haberland out_err: 3428e6125fbaSStefan Haberland return -1; 3429d41dd122SStefan Haberland } 3430d41dd122SStefan Haberland 3431501183f2SStefan Haberland static int dasd_eckd_reload_device(struct dasd_device *device) 3432501183f2SStefan Haberland { 3433501183f2SStefan Haberland struct dasd_eckd_private *private; 3434501183f2SStefan Haberland int rc, old_base; 34352dedf0d9SStefan Haberland char print_uid[60]; 34362dedf0d9SStefan Haberland struct dasd_uid uid; 34372dedf0d9SStefan Haberland unsigned long flags; 3438501183f2SStefan Haberland 3439501183f2SStefan Haberland private = (struct dasd_eckd_private *) device->private; 34402dedf0d9SStefan Haberland 34412dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 3442501183f2SStefan Haberland old_base = private->uid.base_unit_addr; 34432dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 34442dedf0d9SStefan Haberland 3445501183f2SStefan Haberland /* Read Configuration Data */ 3446501183f2SStefan Haberland rc = dasd_eckd_read_conf(device); 3447501183f2SStefan Haberland if (rc) 3448501183f2SStefan Haberland goto out_err; 3449501183f2SStefan Haberland 34502dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 3451501183f2SStefan Haberland if (rc) 3452501183f2SStefan Haberland goto out_err; 3453501183f2SStefan Haberland /* 3454501183f2SStefan Haberland * update unit address configuration and 3455501183f2SStefan Haberland * add device to alias management 3456501183f2SStefan Haberland */ 3457501183f2SStefan Haberland dasd_alias_update_add_device(device); 3458501183f2SStefan Haberland 34592dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &uid); 34602dedf0d9SStefan Haberland 34612dedf0d9SStefan Haberland if (old_base != uid.base_unit_addr) { 34622dedf0d9SStefan Haberland if (strlen(uid.vduit) > 0) 34632dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 34642dedf0d9SStefan Haberland "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial, 34652dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr, uid.vduit); 3466501183f2SStefan Haberland else 34672dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 34682dedf0d9SStefan Haberland "%s.%s.%04x.%02x", uid.vendor, uid.serial, 34692dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr); 3470501183f2SStefan Haberland 3471501183f2SStefan Haberland dev_info(&device->cdev->dev, 3472501183f2SStefan Haberland "An Alias device was reassigned to a new base device " 34732dedf0d9SStefan Haberland "with UID: %s\n", print_uid); 3474501183f2SStefan Haberland } 3475501183f2SStefan Haberland return 0; 3476501183f2SStefan Haberland 3477501183f2SStefan Haberland out_err: 3478501183f2SStefan Haberland return -1; 3479501183f2SStefan Haberland } 3480501183f2SStefan Haberland 3481d41dd122SStefan Haberland static struct ccw_driver dasd_eckd_driver = { 3482d41dd122SStefan Haberland .name = "dasd-eckd", 3483d41dd122SStefan Haberland .owner = THIS_MODULE, 3484d41dd122SStefan Haberland .ids = dasd_eckd_ids, 3485d41dd122SStefan Haberland .probe = dasd_eckd_probe, 3486d41dd122SStefan Haberland .remove = dasd_generic_remove, 3487d41dd122SStefan Haberland .set_offline = dasd_generic_set_offline, 3488d41dd122SStefan Haberland .set_online = dasd_eckd_set_online, 3489d41dd122SStefan Haberland .notify = dasd_generic_notify, 3490d41dd122SStefan Haberland .freeze = dasd_generic_pm_freeze, 3491d41dd122SStefan Haberland .thaw = dasd_generic_restore_device, 3492d41dd122SStefan Haberland .restore = dasd_generic_restore_device, 3493a23ed009SStefan Haberland .uc_handler = dasd_generic_uc_handler, 3494d41dd122SStefan Haberland }; 3495f3eb5384SStefan Weinhuber 34961da177e4SLinus Torvalds /* 34971da177e4SLinus Torvalds * max_blocks is dependent on the amount of storage that is available 34981da177e4SLinus Torvalds * in the static io buffer for each device. Currently each device has 34991da177e4SLinus Torvalds * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has 35001da177e4SLinus Torvalds * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use 35011da177e4SLinus Torvalds * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In 35021da177e4SLinus Torvalds * addition we have one define extent ccw + 16 bytes of data and one 35031da177e4SLinus Torvalds * locate record ccw + 16 bytes of data. That makes: 35041da177e4SLinus Torvalds * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. 35051da177e4SLinus Torvalds * We want to fit two into the available memory so that we can immediately 35061da177e4SLinus Torvalds * start the next request if one finishes off. That makes 249.5 blocks 35071da177e4SLinus Torvalds * for one request. Give a little safety and the result is 240. 35081da177e4SLinus Torvalds */ 35091da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline = { 35101da177e4SLinus Torvalds .owner = THIS_MODULE, 35111da177e4SLinus Torvalds .name = "ECKD", 35121da177e4SLinus Torvalds .ebcname = "ECKD", 35131da177e4SLinus Torvalds .max_blocks = 240, 35141da177e4SLinus Torvalds .check_device = dasd_eckd_check_characteristics, 35158e09f215SStefan Weinhuber .uncheck_device = dasd_eckd_uncheck_device, 35161da177e4SLinus Torvalds .do_analysis = dasd_eckd_do_analysis, 35178e09f215SStefan Weinhuber .ready_to_online = dasd_eckd_ready_to_online, 35188e09f215SStefan Weinhuber .online_to_ready = dasd_eckd_online_to_ready, 35191da177e4SLinus Torvalds .fill_geometry = dasd_eckd_fill_geometry, 35201da177e4SLinus Torvalds .start_IO = dasd_start_IO, 35211da177e4SLinus Torvalds .term_IO = dasd_term_IO, 35228e09f215SStefan Weinhuber .handle_terminated_request = dasd_eckd_handle_terminated_request, 35231da177e4SLinus Torvalds .format_device = dasd_eckd_format_device, 35241da177e4SLinus Torvalds .erp_action = dasd_eckd_erp_action, 35251da177e4SLinus Torvalds .erp_postaction = dasd_eckd_erp_postaction, 35268e09f215SStefan Weinhuber .handle_unsolicited_interrupt = dasd_eckd_handle_unsolicited_interrupt, 35278e09f215SStefan Weinhuber .build_cp = dasd_eckd_build_alias_cp, 35288e09f215SStefan Weinhuber .free_cp = dasd_eckd_free_alias_cp, 35291da177e4SLinus Torvalds .dump_sense = dasd_eckd_dump_sense, 3530fc19f381SStefan Haberland .dump_sense_dbf = dasd_eckd_dump_sense_dbf, 35311da177e4SLinus Torvalds .fill_info = dasd_eckd_fill_info, 35321107ccfbSChristoph Hellwig .ioctl = dasd_eckd_ioctl, 3533d41dd122SStefan Haberland .freeze = dasd_eckd_pm_freeze, 3534d41dd122SStefan Haberland .restore = dasd_eckd_restore_device, 3535501183f2SStefan Haberland .reload = dasd_eckd_reload_device, 35362dedf0d9SStefan Haberland .get_uid = dasd_eckd_get_uid, 35371da177e4SLinus Torvalds }; 35381da177e4SLinus Torvalds 35391da177e4SLinus Torvalds static int __init 35401da177e4SLinus Torvalds dasd_eckd_init(void) 35411da177e4SLinus Torvalds { 3542736e6ea0SSebastian Ott int ret; 3543736e6ea0SSebastian Ott 35441da177e4SLinus Torvalds ASCEBC(dasd_eckd_discipline.ebcname, 4); 3545f932bceaSStefan Weinhuber dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), 3546f932bceaSStefan Weinhuber GFP_KERNEL | GFP_DMA); 3547f932bceaSStefan Weinhuber if (!dasd_reserve_req) 3548f932bceaSStefan Weinhuber return -ENOMEM; 3549736e6ea0SSebastian Ott ret = ccw_driver_register(&dasd_eckd_driver); 3550736e6ea0SSebastian Ott if (!ret) 3551736e6ea0SSebastian Ott wait_for_device_probe(); 3552f932bceaSStefan Weinhuber else 3553f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 3554736e6ea0SSebastian Ott return ret; 35551da177e4SLinus Torvalds } 35561da177e4SLinus Torvalds 35571da177e4SLinus Torvalds static void __exit 35581da177e4SLinus Torvalds dasd_eckd_cleanup(void) 35591da177e4SLinus Torvalds { 35601da177e4SLinus Torvalds ccw_driver_unregister(&dasd_eckd_driver); 3561f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 35621da177e4SLinus Torvalds } 35631da177e4SLinus Torvalds 35641da177e4SLinus Torvalds module_init(dasd_eckd_init); 35651da177e4SLinus Torvalds module_exit(dasd_eckd_cleanup); 3566