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 */ 1779a5a0061fSStefan Weinhuber sense = dasd_get_sense(irb); 1780a5a0061fSStefan Weinhuber if (sense && (sense[7] == 0x0D) && 1781a5a0061fSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { 17828e09f215SStefan Weinhuber dasd_alias_handle_summary_unit_check(device, irb); 17838e09f215SStefan Weinhuber return; 17848e09f215SStefan Weinhuber } 17858e09f215SStefan Weinhuber 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 1794a5a0061fSStefan Weinhuber if ((scsw_cc(&irb->scsw) == 1) && !sense && 1795a5a0061fSStefan Weinhuber (scsw_fctl(&irb->scsw) == SCSW_FCTL_START_FUNC) && 1796a5a0061fSStefan Weinhuber (scsw_actl(&irb->scsw) == SCSW_ACTL_START_PEND) && 1797a5a0061fSStefan 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 1803ada3df91SStefan Haberland dasd_schedule_device_bh(device); 18048e09f215SStefan Weinhuber return; 18058e09f215SStefan Weinhuber }; 18068e09f215SStefan Weinhuber 1807f3eb5384SStefan Weinhuber 1808f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( 1809f3eb5384SStefan Weinhuber struct dasd_device *startdev, 18108e09f215SStefan Weinhuber struct dasd_block *block, 1811f3eb5384SStefan Weinhuber struct request *req, 1812f3eb5384SStefan Weinhuber sector_t first_rec, 1813f3eb5384SStefan Weinhuber sector_t last_rec, 1814f3eb5384SStefan Weinhuber sector_t first_trk, 1815f3eb5384SStefan Weinhuber sector_t last_trk, 1816f3eb5384SStefan Weinhuber unsigned int first_offs, 1817f3eb5384SStefan Weinhuber unsigned int last_offs, 1818f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 1819f3eb5384SStefan Weinhuber unsigned int blksize) 18201da177e4SLinus Torvalds { 18211da177e4SLinus Torvalds struct dasd_eckd_private *private; 18221da177e4SLinus Torvalds unsigned long *idaws; 18231da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 18241da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 18251da177e4SLinus Torvalds struct ccw1 *ccw; 18265705f702SNeilBrown struct req_iterator iter; 18271da177e4SLinus Torvalds struct bio_vec *bv; 18281da177e4SLinus Torvalds char *dst; 1829f3eb5384SStefan Weinhuber unsigned int off; 18301da177e4SLinus Torvalds int count, cidaw, cplength, datasize; 1831f3eb5384SStefan Weinhuber sector_t recid; 18321da177e4SLinus Torvalds unsigned char cmd, rcmd; 18338e09f215SStefan Weinhuber int use_prefix; 18348e09f215SStefan Weinhuber struct dasd_device *basedev; 18351da177e4SLinus Torvalds 18368e09f215SStefan Weinhuber basedev = block->base; 18378e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 18381da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 18391da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_READ_MT; 18401da177e4SLinus Torvalds else if (rq_data_dir(req) == WRITE) 18411da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_WRITE_MT; 18421da177e4SLinus Torvalds else 18431da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 1844f3eb5384SStefan Weinhuber 18451da177e4SLinus Torvalds /* Check struct bio and count the number of blocks for the request. */ 18461da177e4SLinus Torvalds count = 0; 18471da177e4SLinus Torvalds cidaw = 0; 18485705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 18491da177e4SLinus Torvalds if (bv->bv_len & (blksize - 1)) 18501da177e4SLinus Torvalds /* Eckd can only do full blocks. */ 18511da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 18528e09f215SStefan Weinhuber count += bv->bv_len >> (block->s2b_shift + 9); 1853347a8dc3SMartin Schwidefsky #if defined(CONFIG_64BIT) 18546c92e699SJens Axboe if (idal_is_needed (page_address(bv->bv_page), bv->bv_len)) 18558e09f215SStefan Weinhuber cidaw += bv->bv_len >> (block->s2b_shift + 9); 18561da177e4SLinus Torvalds #endif 18571da177e4SLinus Torvalds } 18581da177e4SLinus Torvalds /* Paranoia. */ 18591da177e4SLinus Torvalds if (count != last_rec - first_rec + 1) 18601da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 18618e09f215SStefan Weinhuber 18628e09f215SStefan Weinhuber /* use the prefix command if available */ 18638e09f215SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 18648e09f215SStefan Weinhuber if (use_prefix) { 18658e09f215SStefan Weinhuber /* 1x prefix + number of blocks */ 18668e09f215SStefan Weinhuber cplength = 2 + count; 18678e09f215SStefan Weinhuber /* 1x prefix + cidaws*sizeof(long) */ 18688e09f215SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 18698e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 18708e09f215SStefan Weinhuber cidaw * sizeof(unsigned long); 18718e09f215SStefan Weinhuber } else { 18721da177e4SLinus Torvalds /* 1x define extent + 1x locate record + number of blocks */ 18731da177e4SLinus Torvalds cplength = 2 + count; 18741da177e4SLinus Torvalds /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 18758e09f215SStefan Weinhuber datasize = sizeof(struct DE_eckd_data) + 18768e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 18771da177e4SLinus Torvalds cidaw * sizeof(unsigned long); 18788e09f215SStefan Weinhuber } 18791da177e4SLinus Torvalds /* Find out the number of additional locate record ccws for cdl. */ 18801da177e4SLinus Torvalds if (private->uses_cdl && first_rec < 2*blk_per_trk) { 18811da177e4SLinus Torvalds if (last_rec >= 2*blk_per_trk) 18821da177e4SLinus Torvalds count = 2*blk_per_trk - first_rec; 18831da177e4SLinus Torvalds cplength += count; 18841da177e4SLinus Torvalds datasize += count*sizeof(struct LO_eckd_data); 18851da177e4SLinus Torvalds } 18861da177e4SLinus Torvalds /* Allocate the ccw request. */ 188768b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 188868b781feSStefan Haberland startdev); 18891da177e4SLinus Torvalds if (IS_ERR(cqr)) 18901da177e4SLinus Torvalds return cqr; 18911da177e4SLinus Torvalds ccw = cqr->cpaddr; 18928e09f215SStefan Weinhuber /* First ccw is define extent or prefix. */ 18938e09f215SStefan Weinhuber if (use_prefix) { 18948e09f215SStefan Weinhuber if (prefix(ccw++, cqr->data, first_trk, 18958e09f215SStefan Weinhuber last_trk, cmd, basedev, startdev) == -EAGAIN) { 18968e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 18978e09f215SStefan Weinhuber * Try again later. 18988e09f215SStefan Weinhuber */ 18998e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 1900d54853efSMartin Schwidefsky return ERR_PTR(-EAGAIN); 1901d54853efSMartin Schwidefsky } 19028e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 19038e09f215SStefan Weinhuber sizeof(struct PFX_eckd_data)); 19048e09f215SStefan Weinhuber } else { 19058e09f215SStefan Weinhuber if (define_extent(ccw++, cqr->data, first_trk, 19068e09f215SStefan Weinhuber last_trk, cmd, 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); 19118e09f215SStefan Weinhuber return ERR_PTR(-EAGAIN); 19128e09f215SStefan Weinhuber } 19138e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 19148e09f215SStefan Weinhuber sizeof(struct DE_eckd_data)); 19158e09f215SStefan Weinhuber } 19161da177e4SLinus Torvalds /* Build locate_record+read/write/ccws. */ 19171da177e4SLinus Torvalds LO_data = (struct LO_eckd_data *) (idaws + cidaw); 19181da177e4SLinus Torvalds recid = first_rec; 19191da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 19201da177e4SLinus Torvalds /* Only standard blocks so there is just one locate record. */ 19211da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 19221da177e4SLinus Torvalds locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 19238e09f215SStefan Weinhuber last_rec - recid + 1, cmd, basedev, blksize); 19241da177e4SLinus Torvalds } 19255705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 19261da177e4SLinus Torvalds dst = page_address(bv->bv_page) + bv->bv_offset; 19271da177e4SLinus Torvalds if (dasd_page_cache) { 19281da177e4SLinus Torvalds char *copy = kmem_cache_alloc(dasd_page_cache, 1929441e143eSChristoph Lameter GFP_DMA | __GFP_NOWARN); 19301da177e4SLinus Torvalds if (copy && rq_data_dir(req) == WRITE) 19311da177e4SLinus Torvalds memcpy(copy + bv->bv_offset, dst, bv->bv_len); 19321da177e4SLinus Torvalds if (copy) 19331da177e4SLinus Torvalds dst = copy + bv->bv_offset; 19341da177e4SLinus Torvalds } 19351da177e4SLinus Torvalds for (off = 0; off < bv->bv_len; off += blksize) { 19361da177e4SLinus Torvalds sector_t trkid = recid; 19371da177e4SLinus Torvalds unsigned int recoffs = sector_div(trkid, blk_per_trk); 19381da177e4SLinus Torvalds rcmd = cmd; 19391da177e4SLinus Torvalds count = blksize; 19401da177e4SLinus Torvalds /* Locate record for cdl special block ? */ 19411da177e4SLinus Torvalds if (private->uses_cdl && recid < 2*blk_per_trk) { 19421da177e4SLinus Torvalds if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 19431da177e4SLinus Torvalds rcmd |= 0x8; 19441da177e4SLinus Torvalds count = dasd_eckd_cdl_reclen(recid); 1945ec5883abSHorst Hummel if (count < blksize && 1946ec5883abSHorst Hummel rq_data_dir(req) == READ) 19471da177e4SLinus Torvalds memset(dst + count, 0xe5, 19481da177e4SLinus Torvalds blksize - count); 19491da177e4SLinus Torvalds } 19501da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 19511da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 19521da177e4SLinus Torvalds trkid, recoffs + 1, 19538e09f215SStefan Weinhuber 1, rcmd, basedev, count); 19541da177e4SLinus Torvalds } 19551da177e4SLinus Torvalds /* Locate record for standard blocks ? */ 19561da177e4SLinus Torvalds if (private->uses_cdl && recid == 2*blk_per_trk) { 19571da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 19581da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 19591da177e4SLinus Torvalds trkid, recoffs + 1, 19601da177e4SLinus Torvalds last_rec - recid + 1, 19618e09f215SStefan Weinhuber cmd, basedev, count); 19621da177e4SLinus Torvalds } 19631da177e4SLinus Torvalds /* Read/write ccw. */ 19641da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 19651da177e4SLinus Torvalds ccw->cmd_code = rcmd; 19661da177e4SLinus Torvalds ccw->count = count; 19671da177e4SLinus Torvalds if (idal_is_needed(dst, blksize)) { 19681da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) idaws; 19691da177e4SLinus Torvalds ccw->flags = CCW_FLAG_IDA; 19701da177e4SLinus Torvalds idaws = idal_create_words(idaws, dst, blksize); 19711da177e4SLinus Torvalds } else { 19721da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) dst; 19731da177e4SLinus Torvalds ccw->flags = 0; 19741da177e4SLinus Torvalds } 19751da177e4SLinus Torvalds ccw++; 19761da177e4SLinus Torvalds dst += blksize; 19771da177e4SLinus Torvalds recid++; 19781da177e4SLinus Torvalds } 19791da177e4SLinus Torvalds } 198013de227bSHolger Smolinski if (blk_noretry_request(req) || 198113de227bSHolger Smolinski block->base->features & DASD_FEATURE_FAILFAST) 19821c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 19838e09f215SStefan Weinhuber cqr->startdev = startdev; 19848e09f215SStefan Weinhuber cqr->memdev = startdev; 19858e09f215SStefan Weinhuber cqr->block = block; 19867c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 19871da177e4SLinus Torvalds cqr->lpm = private->path_data.ppm; 19881da177e4SLinus Torvalds cqr->retries = 256; 19891da177e4SLinus Torvalds cqr->buildclk = get_clock(); 19901da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 19911da177e4SLinus Torvalds return cqr; 19921da177e4SLinus Torvalds } 19931da177e4SLinus Torvalds 1994f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 1995f3eb5384SStefan Weinhuber struct dasd_device *startdev, 1996f3eb5384SStefan Weinhuber struct dasd_block *block, 1997f3eb5384SStefan Weinhuber struct request *req, 1998f3eb5384SStefan Weinhuber sector_t first_rec, 1999f3eb5384SStefan Weinhuber sector_t last_rec, 2000f3eb5384SStefan Weinhuber sector_t first_trk, 2001f3eb5384SStefan Weinhuber sector_t last_trk, 2002f3eb5384SStefan Weinhuber unsigned int first_offs, 2003f3eb5384SStefan Weinhuber unsigned int last_offs, 2004f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 2005f3eb5384SStefan Weinhuber unsigned int blksize) 2006f3eb5384SStefan Weinhuber { 2007f3eb5384SStefan Weinhuber struct dasd_eckd_private *private; 2008f3eb5384SStefan Weinhuber unsigned long *idaws; 2009f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 2010f3eb5384SStefan Weinhuber struct ccw1 *ccw; 2011f3eb5384SStefan Weinhuber struct req_iterator iter; 2012f3eb5384SStefan Weinhuber struct bio_vec *bv; 2013f3eb5384SStefan Weinhuber char *dst, *idaw_dst; 2014f3eb5384SStefan Weinhuber unsigned int cidaw, cplength, datasize; 2015f3eb5384SStefan Weinhuber unsigned int tlf; 2016f3eb5384SStefan Weinhuber sector_t recid; 2017f3eb5384SStefan Weinhuber unsigned char cmd; 2018f3eb5384SStefan Weinhuber struct dasd_device *basedev; 2019f3eb5384SStefan Weinhuber unsigned int trkcount, count, count_to_trk_end; 2020f3eb5384SStefan Weinhuber unsigned int idaw_len, seg_len, part_len, len_to_track_end; 2021f3eb5384SStefan Weinhuber unsigned char new_track, end_idaw; 2022f3eb5384SStefan Weinhuber sector_t trkid; 2023f3eb5384SStefan Weinhuber unsigned int recoffs; 2024f3eb5384SStefan Weinhuber 2025f3eb5384SStefan Weinhuber basedev = block->base; 2026f3eb5384SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 2027f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) 2028f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 2029f3eb5384SStefan Weinhuber else if (rq_data_dir(req) == WRITE) 2030f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 2031f3eb5384SStefan Weinhuber else 2032f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 2033f3eb5384SStefan Weinhuber 2034f3eb5384SStefan Weinhuber /* Track based I/O needs IDAWs for each page, and not just for 2035f3eb5384SStefan Weinhuber * 64 bit addresses. We need additional idals for pages 2036f3eb5384SStefan Weinhuber * that get filled from two tracks, so we use the number 2037f3eb5384SStefan Weinhuber * of records as upper limit. 2038f3eb5384SStefan Weinhuber */ 2039f3eb5384SStefan Weinhuber cidaw = last_rec - first_rec + 1; 2040f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 2041f3eb5384SStefan Weinhuber 2042f3eb5384SStefan Weinhuber /* 1x prefix + one read/write ccw per track */ 2043f3eb5384SStefan Weinhuber cplength = 1 + trkcount; 2044f3eb5384SStefan Weinhuber 2045f3eb5384SStefan Weinhuber /* on 31-bit we need space for two 32 bit addresses per page 2046f3eb5384SStefan Weinhuber * on 64-bit one 64 bit address 2047f3eb5384SStefan Weinhuber */ 2048f3eb5384SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 2049f3eb5384SStefan Weinhuber cidaw * sizeof(unsigned long long); 2050f3eb5384SStefan Weinhuber 2051f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 205268b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 205368b781feSStefan Haberland startdev); 2054f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 2055f3eb5384SStefan Weinhuber return cqr; 2056f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 2057f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 2058f3eb5384SStefan Weinhuber if (first_trk == last_trk) 2059f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 2060f3eb5384SStefan Weinhuber else 2061f3eb5384SStefan Weinhuber tlf = last_offs + 1; 2062f3eb5384SStefan Weinhuber tlf *= blksize; 2063f3eb5384SStefan Weinhuber 2064f3eb5384SStefan Weinhuber if (prefix_LRE(ccw++, cqr->data, first_trk, 2065f3eb5384SStefan Weinhuber last_trk, cmd, basedev, startdev, 2066f3eb5384SStefan Weinhuber 1 /* format */, first_offs + 1, 2067f3eb5384SStefan Weinhuber trkcount, blksize, 2068f3eb5384SStefan Weinhuber tlf) == -EAGAIN) { 2069f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 2070f3eb5384SStefan Weinhuber * Try again later. 2071f3eb5384SStefan Weinhuber */ 2072f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2073f3eb5384SStefan Weinhuber return ERR_PTR(-EAGAIN); 2074f3eb5384SStefan Weinhuber } 2075f3eb5384SStefan Weinhuber 2076f3eb5384SStefan Weinhuber /* 2077f3eb5384SStefan Weinhuber * The translation of request into ccw programs must meet the 2078f3eb5384SStefan Weinhuber * following conditions: 2079f3eb5384SStefan Weinhuber * - all idaws but the first and the last must address full pages 2080f3eb5384SStefan Weinhuber * (or 2K blocks on 31-bit) 2081f3eb5384SStefan Weinhuber * - the scope of a ccw and it's idal ends with the track boundaries 2082f3eb5384SStefan Weinhuber */ 2083f3eb5384SStefan Weinhuber idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); 2084f3eb5384SStefan Weinhuber recid = first_rec; 2085f3eb5384SStefan Weinhuber new_track = 1; 2086f3eb5384SStefan Weinhuber end_idaw = 0; 2087f3eb5384SStefan Weinhuber len_to_track_end = 0; 2088f3eb5384SStefan Weinhuber idaw_dst = 0; 2089f3eb5384SStefan Weinhuber idaw_len = 0; 2090f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 2091f3eb5384SStefan Weinhuber dst = page_address(bv->bv_page) + bv->bv_offset; 2092f3eb5384SStefan Weinhuber seg_len = bv->bv_len; 2093f3eb5384SStefan Weinhuber while (seg_len) { 2094f3eb5384SStefan Weinhuber if (new_track) { 2095f3eb5384SStefan Weinhuber trkid = recid; 2096f3eb5384SStefan Weinhuber recoffs = sector_div(trkid, blk_per_trk); 2097f3eb5384SStefan Weinhuber count_to_trk_end = blk_per_trk - recoffs; 2098f3eb5384SStefan Weinhuber count = min((last_rec - recid + 1), 2099f3eb5384SStefan Weinhuber (sector_t)count_to_trk_end); 2100f3eb5384SStefan Weinhuber len_to_track_end = count * blksize; 2101f3eb5384SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 2102f3eb5384SStefan Weinhuber ccw->cmd_code = cmd; 2103f3eb5384SStefan Weinhuber ccw->count = len_to_track_end; 2104f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 2105f3eb5384SStefan Weinhuber ccw->flags = CCW_FLAG_IDA; 2106f3eb5384SStefan Weinhuber ccw++; 2107f3eb5384SStefan Weinhuber recid += count; 2108f3eb5384SStefan Weinhuber new_track = 0; 210952db45c3SStefan Weinhuber /* first idaw for a ccw may start anywhere */ 211052db45c3SStefan Weinhuber if (!idaw_dst) 211152db45c3SStefan Weinhuber idaw_dst = dst; 2112f3eb5384SStefan Weinhuber } 211352db45c3SStefan Weinhuber /* If we start a new idaw, we must make sure that it 211452db45c3SStefan Weinhuber * starts on an IDA_BLOCK_SIZE boundary. 2115f3eb5384SStefan Weinhuber * If we continue an idaw, we must make sure that the 2116f3eb5384SStefan Weinhuber * current segment begins where the so far accumulated 2117f3eb5384SStefan Weinhuber * idaw ends 2118f3eb5384SStefan Weinhuber */ 211952db45c3SStefan Weinhuber if (!idaw_dst) { 212052db45c3SStefan Weinhuber if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { 212152db45c3SStefan Weinhuber dasd_sfree_request(cqr, startdev); 212252db45c3SStefan Weinhuber return ERR_PTR(-ERANGE); 212352db45c3SStefan Weinhuber } else 2124f3eb5384SStefan Weinhuber idaw_dst = dst; 212552db45c3SStefan Weinhuber } 2126f3eb5384SStefan Weinhuber if ((idaw_dst + idaw_len) != dst) { 2127f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2128f3eb5384SStefan Weinhuber return ERR_PTR(-ERANGE); 2129f3eb5384SStefan Weinhuber } 2130f3eb5384SStefan Weinhuber part_len = min(seg_len, len_to_track_end); 2131f3eb5384SStefan Weinhuber seg_len -= part_len; 2132f3eb5384SStefan Weinhuber dst += part_len; 2133f3eb5384SStefan Weinhuber idaw_len += part_len; 2134f3eb5384SStefan Weinhuber len_to_track_end -= part_len; 2135f3eb5384SStefan Weinhuber /* collected memory area ends on an IDA_BLOCK border, 2136f3eb5384SStefan Weinhuber * -> create an idaw 2137f3eb5384SStefan Weinhuber * idal_create_words will handle cases where idaw_len 2138f3eb5384SStefan Weinhuber * is larger then IDA_BLOCK_SIZE 2139f3eb5384SStefan Weinhuber */ 2140f3eb5384SStefan Weinhuber if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) 2141f3eb5384SStefan Weinhuber end_idaw = 1; 2142f3eb5384SStefan Weinhuber /* We also need to end the idaw at track end */ 2143f3eb5384SStefan Weinhuber if (!len_to_track_end) { 2144f3eb5384SStefan Weinhuber new_track = 1; 2145f3eb5384SStefan Weinhuber end_idaw = 1; 2146f3eb5384SStefan Weinhuber } 2147f3eb5384SStefan Weinhuber if (end_idaw) { 2148f3eb5384SStefan Weinhuber idaws = idal_create_words(idaws, idaw_dst, 2149f3eb5384SStefan Weinhuber idaw_len); 2150f3eb5384SStefan Weinhuber idaw_dst = 0; 2151f3eb5384SStefan Weinhuber idaw_len = 0; 2152f3eb5384SStefan Weinhuber end_idaw = 0; 2153f3eb5384SStefan Weinhuber } 2154f3eb5384SStefan Weinhuber } 2155f3eb5384SStefan Weinhuber } 2156f3eb5384SStefan Weinhuber 2157f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 2158f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 2159f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2160f3eb5384SStefan Weinhuber cqr->startdev = startdev; 2161f3eb5384SStefan Weinhuber cqr->memdev = startdev; 2162f3eb5384SStefan Weinhuber cqr->block = block; 21637c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2164f3eb5384SStefan Weinhuber cqr->lpm = private->path_data.ppm; 2165f3eb5384SStefan Weinhuber cqr->retries = 256; 2166f3eb5384SStefan Weinhuber cqr->buildclk = get_clock(); 2167f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 2168f3eb5384SStefan Weinhuber return cqr; 2169f3eb5384SStefan Weinhuber } 2170f3eb5384SStefan Weinhuber 2171f3eb5384SStefan Weinhuber static int prepare_itcw(struct itcw *itcw, 2172f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 2173f3eb5384SStefan Weinhuber struct dasd_device *basedev, 2174f3eb5384SStefan Weinhuber struct dasd_device *startdev, 2175f3eb5384SStefan Weinhuber unsigned int rec_on_trk, int count, 2176f3eb5384SStefan Weinhuber unsigned int blksize, 2177f3eb5384SStefan Weinhuber unsigned int total_data_size, 2178f3eb5384SStefan Weinhuber unsigned int tlf, 2179f3eb5384SStefan Weinhuber unsigned int blk_per_trk) 2180f3eb5384SStefan Weinhuber { 2181f3eb5384SStefan Weinhuber struct PFX_eckd_data pfxdata; 2182f3eb5384SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 2183f3eb5384SStefan Weinhuber struct DE_eckd_data *dedata; 2184f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 2185f3eb5384SStefan Weinhuber struct dcw *dcw; 2186f3eb5384SStefan Weinhuber 2187f3eb5384SStefan Weinhuber u32 begcyl, endcyl; 2188f3eb5384SStefan Weinhuber u16 heads, beghead, endhead; 2189f3eb5384SStefan Weinhuber u8 pfx_cmd; 2190f3eb5384SStefan Weinhuber 2191f3eb5384SStefan Weinhuber int rc = 0; 2192f3eb5384SStefan Weinhuber int sector = 0; 2193f3eb5384SStefan Weinhuber int dn, d; 2194f3eb5384SStefan Weinhuber 2195f3eb5384SStefan Weinhuber 2196f3eb5384SStefan Weinhuber /* setup prefix data */ 2197f3eb5384SStefan Weinhuber basepriv = (struct dasd_eckd_private *) basedev->private; 2198f3eb5384SStefan Weinhuber startpriv = (struct dasd_eckd_private *) startdev->private; 2199f3eb5384SStefan Weinhuber dedata = &pfxdata.define_extent; 2200f3eb5384SStefan Weinhuber lredata = &pfxdata.locate_record; 2201f3eb5384SStefan Weinhuber 2202f3eb5384SStefan Weinhuber memset(&pfxdata, 0, sizeof(pfxdata)); 2203f3eb5384SStefan Weinhuber pfxdata.format = 1; /* PFX with LRE */ 2204f3eb5384SStefan Weinhuber pfxdata.base_address = basepriv->ned->unit_addr; 2205f3eb5384SStefan Weinhuber pfxdata.base_lss = basepriv->ned->ID; 2206f3eb5384SStefan Weinhuber pfxdata.validity.define_extent = 1; 2207f3eb5384SStefan Weinhuber 2208f3eb5384SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 2209f3eb5384SStefan Weinhuber if (startpriv->uid.type != UA_BASE_DEVICE) { 2210f3eb5384SStefan Weinhuber pfxdata.validity.verify_base = 1; 2211f3eb5384SStefan Weinhuber if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 2212f3eb5384SStefan Weinhuber pfxdata.validity.hyper_pav = 1; 2213f3eb5384SStefan Weinhuber } 2214f3eb5384SStefan Weinhuber 2215f3eb5384SStefan Weinhuber switch (cmd) { 2216f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 2217f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 2218f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 2219f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 2220f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 2221f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 2222f3eb5384SStefan Weinhuber lredata->operation.operation = 0x0C; 2223f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x01; 2224f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX_READ; 2225f3eb5384SStefan Weinhuber break; 2226f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 2227f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 2228f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 2229f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 2230f3eb5384SStefan Weinhuber rc = check_XRC_on_prefix(&pfxdata, basedev); 2231f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 2232f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 2233f3eb5384SStefan Weinhuber lredata->operation.operation = 0x3F; 2234f3eb5384SStefan Weinhuber lredata->extended_operation = 0x23; 2235f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x2; 2236f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX; 2237f3eb5384SStefan Weinhuber break; 2238f3eb5384SStefan Weinhuber default: 2239f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 2240f3eb5384SStefan Weinhuber "prepare itcw, unknown opcode 0x%x", cmd); 2241f3eb5384SStefan Weinhuber BUG(); 2242f3eb5384SStefan Weinhuber break; 2243f3eb5384SStefan Weinhuber } 2244f3eb5384SStefan Weinhuber if (rc) 2245f3eb5384SStefan Weinhuber return rc; 2246f3eb5384SStefan Weinhuber 2247f3eb5384SStefan Weinhuber dedata->attributes.mode = 0x3; /* ECKD */ 2248f3eb5384SStefan Weinhuber 2249f3eb5384SStefan Weinhuber heads = basepriv->rdc_data.trk_per_cyl; 2250f3eb5384SStefan Weinhuber begcyl = trk / heads; 2251f3eb5384SStefan Weinhuber beghead = trk % heads; 2252f3eb5384SStefan Weinhuber endcyl = totrk / heads; 2253f3eb5384SStefan Weinhuber endhead = totrk % heads; 2254f3eb5384SStefan Weinhuber 2255f3eb5384SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 2256f3eb5384SStefan Weinhuber if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 2257f3eb5384SStefan Weinhuber dedata->attributes.operation == DASD_SEQ_ACCESS) { 2258f3eb5384SStefan Weinhuber 2259f3eb5384SStefan Weinhuber if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 2260f3eb5384SStefan Weinhuber endcyl += basepriv->attrib.nr_cyl; 2261f3eb5384SStefan Weinhuber else 2262f3eb5384SStefan Weinhuber endcyl = (basepriv->real_cyl - 1); 2263f3eb5384SStefan Weinhuber } 2264f3eb5384SStefan Weinhuber 2265f3eb5384SStefan Weinhuber set_ch_t(&dedata->beg_ext, begcyl, beghead); 2266f3eb5384SStefan Weinhuber set_ch_t(&dedata->end_ext, endcyl, endhead); 2267f3eb5384SStefan Weinhuber 2268f3eb5384SStefan Weinhuber dedata->ep_format = 0x20; /* records per track is valid */ 2269f3eb5384SStefan Weinhuber dedata->ep_rec_per_track = blk_per_trk; 2270f3eb5384SStefan Weinhuber 2271f3eb5384SStefan Weinhuber if (rec_on_trk) { 2272f3eb5384SStefan Weinhuber switch (basepriv->rdc_data.dev_type) { 2273f3eb5384SStefan Weinhuber case 0x3390: 2274f3eb5384SStefan Weinhuber dn = ceil_quot(blksize + 6, 232); 2275f3eb5384SStefan Weinhuber d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); 2276f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 2277f3eb5384SStefan Weinhuber break; 2278f3eb5384SStefan Weinhuber case 0x3380: 2279f3eb5384SStefan Weinhuber d = 7 + ceil_quot(blksize + 12, 32); 2280f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 2281f3eb5384SStefan Weinhuber break; 2282f3eb5384SStefan Weinhuber } 2283f3eb5384SStefan Weinhuber } 2284f3eb5384SStefan Weinhuber 2285f3eb5384SStefan Weinhuber lredata->auxiliary.length_valid = 1; 2286f3eb5384SStefan Weinhuber lredata->auxiliary.length_scope = 1; 2287f3eb5384SStefan Weinhuber lredata->auxiliary.imbedded_ccw_valid = 1; 2288f3eb5384SStefan Weinhuber lredata->length = tlf; 2289f3eb5384SStefan Weinhuber lredata->imbedded_ccw = cmd; 2290f3eb5384SStefan Weinhuber lredata->count = count; 2291f3eb5384SStefan Weinhuber lredata->sector = sector; 2292f3eb5384SStefan Weinhuber set_ch_t(&lredata->seek_addr, begcyl, beghead); 2293f3eb5384SStefan Weinhuber lredata->search_arg.cyl = lredata->seek_addr.cyl; 2294f3eb5384SStefan Weinhuber lredata->search_arg.head = lredata->seek_addr.head; 2295f3eb5384SStefan Weinhuber lredata->search_arg.record = rec_on_trk; 2296f3eb5384SStefan Weinhuber 2297f3eb5384SStefan Weinhuber dcw = itcw_add_dcw(itcw, pfx_cmd, 0, 2298f3eb5384SStefan Weinhuber &pfxdata, sizeof(pfxdata), total_data_size); 2299f3eb5384SStefan Weinhuber 2300f3eb5384SStefan Weinhuber return rc; 2301f3eb5384SStefan Weinhuber } 2302f3eb5384SStefan Weinhuber 2303f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 2304f3eb5384SStefan Weinhuber struct dasd_device *startdev, 2305f3eb5384SStefan Weinhuber struct dasd_block *block, 2306f3eb5384SStefan Weinhuber struct request *req, 2307f3eb5384SStefan Weinhuber sector_t first_rec, 2308f3eb5384SStefan Weinhuber sector_t last_rec, 2309f3eb5384SStefan Weinhuber sector_t first_trk, 2310f3eb5384SStefan Weinhuber sector_t last_trk, 2311f3eb5384SStefan Weinhuber unsigned int first_offs, 2312f3eb5384SStefan Weinhuber unsigned int last_offs, 2313f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 2314f3eb5384SStefan Weinhuber unsigned int blksize) 2315f3eb5384SStefan Weinhuber { 2316f3eb5384SStefan Weinhuber struct dasd_eckd_private *private; 2317f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 2318f3eb5384SStefan Weinhuber struct req_iterator iter; 2319f3eb5384SStefan Weinhuber struct bio_vec *bv; 2320f3eb5384SStefan Weinhuber char *dst; 2321f3eb5384SStefan Weinhuber unsigned int trkcount, ctidaw; 2322f3eb5384SStefan Weinhuber unsigned char cmd; 2323f3eb5384SStefan Weinhuber struct dasd_device *basedev; 2324f3eb5384SStefan Weinhuber unsigned int tlf; 2325f3eb5384SStefan Weinhuber struct itcw *itcw; 2326f3eb5384SStefan Weinhuber struct tidaw *last_tidaw = NULL; 2327f3eb5384SStefan Weinhuber int itcw_op; 2328f3eb5384SStefan Weinhuber size_t itcw_size; 2329f3eb5384SStefan Weinhuber 2330f3eb5384SStefan Weinhuber basedev = block->base; 2331f3eb5384SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 2332f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) { 2333f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 2334f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_READ; 2335f3eb5384SStefan Weinhuber } else if (rq_data_dir(req) == WRITE) { 2336f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 2337f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_WRITE; 2338f3eb5384SStefan Weinhuber } else 2339f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 2340f3eb5384SStefan Weinhuber 2341f3eb5384SStefan Weinhuber /* trackbased I/O needs address all memory via TIDAWs, 2342f3eb5384SStefan Weinhuber * not just for 64 bit addresses. This allows us to map 2343f3eb5384SStefan Weinhuber * each segment directly to one tidaw. 2344f3eb5384SStefan Weinhuber */ 2345f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 2346f3eb5384SStefan Weinhuber ctidaw = 0; 2347f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 2348f3eb5384SStefan Weinhuber ++ctidaw; 2349f3eb5384SStefan Weinhuber } 2350f3eb5384SStefan Weinhuber 2351f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 2352f3eb5384SStefan Weinhuber itcw_size = itcw_calc_size(0, ctidaw, 0); 235368b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 2354f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 2355f3eb5384SStefan Weinhuber return cqr; 2356f3eb5384SStefan Weinhuber 2357f3eb5384SStefan Weinhuber cqr->cpmode = 1; 2358f3eb5384SStefan Weinhuber cqr->startdev = startdev; 2359f3eb5384SStefan Weinhuber cqr->memdev = startdev; 2360f3eb5384SStefan Weinhuber cqr->block = block; 2361f3eb5384SStefan Weinhuber cqr->expires = 100*HZ; 2362f3eb5384SStefan Weinhuber cqr->buildclk = get_clock(); 2363f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 2364f3eb5384SStefan Weinhuber cqr->retries = 10; 2365f3eb5384SStefan Weinhuber 2366f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 2367f3eb5384SStefan Weinhuber if (first_trk == last_trk) 2368f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 2369f3eb5384SStefan Weinhuber else 2370f3eb5384SStefan Weinhuber tlf = last_offs + 1; 2371f3eb5384SStefan Weinhuber tlf *= blksize; 2372f3eb5384SStefan Weinhuber 2373f3eb5384SStefan Weinhuber itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); 2374f3eb5384SStefan Weinhuber cqr->cpaddr = itcw_get_tcw(itcw); 2375f3eb5384SStefan Weinhuber 2376f3eb5384SStefan Weinhuber if (prepare_itcw(itcw, first_trk, last_trk, 2377f3eb5384SStefan Weinhuber cmd, basedev, startdev, 2378f3eb5384SStefan Weinhuber first_offs + 1, 2379f3eb5384SStefan Weinhuber trkcount, blksize, 2380f3eb5384SStefan Weinhuber (last_rec - first_rec + 1) * blksize, 2381f3eb5384SStefan Weinhuber tlf, blk_per_trk) == -EAGAIN) { 2382f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 2383f3eb5384SStefan Weinhuber * Try again later. 2384f3eb5384SStefan Weinhuber */ 2385f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2386f3eb5384SStefan Weinhuber return ERR_PTR(-EAGAIN); 2387f3eb5384SStefan Weinhuber } 2388f3eb5384SStefan Weinhuber 2389f3eb5384SStefan Weinhuber /* 2390f3eb5384SStefan Weinhuber * A tidaw can address 4k of memory, but must not cross page boundaries 2391f3eb5384SStefan Weinhuber * We can let the block layer handle this by setting 2392f3eb5384SStefan Weinhuber * blk_queue_segment_boundary to page boundaries and 2393f3eb5384SStefan Weinhuber * blk_max_segment_size to page size when setting up the request queue. 2394f3eb5384SStefan Weinhuber */ 2395f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 2396f3eb5384SStefan Weinhuber dst = page_address(bv->bv_page) + bv->bv_offset; 2397f3eb5384SStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, 0x00, dst, bv->bv_len); 2398f3eb5384SStefan Weinhuber if (IS_ERR(last_tidaw)) 2399f3eb5384SStefan Weinhuber return (struct dasd_ccw_req *)last_tidaw; 2400f3eb5384SStefan Weinhuber } 2401f3eb5384SStefan Weinhuber 2402f3eb5384SStefan Weinhuber last_tidaw->flags |= 0x80; 2403f3eb5384SStefan Weinhuber itcw_finalize(itcw); 2404f3eb5384SStefan Weinhuber 2405f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 2406f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 2407f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2408f3eb5384SStefan Weinhuber cqr->startdev = startdev; 2409f3eb5384SStefan Weinhuber cqr->memdev = startdev; 2410f3eb5384SStefan Weinhuber cqr->block = block; 24117c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2412f3eb5384SStefan Weinhuber cqr->lpm = private->path_data.ppm; 2413f3eb5384SStefan Weinhuber cqr->retries = 256; 2414f3eb5384SStefan Weinhuber cqr->buildclk = get_clock(); 2415f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 2416f3eb5384SStefan Weinhuber return cqr; 2417f3eb5384SStefan Weinhuber } 2418f3eb5384SStefan Weinhuber 2419f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 2420f3eb5384SStefan Weinhuber struct dasd_block *block, 2421f3eb5384SStefan Weinhuber struct request *req) 2422f3eb5384SStefan Weinhuber { 2423f3eb5384SStefan Weinhuber int tpm, cmdrtd, cmdwtd; 2424f3eb5384SStefan Weinhuber int use_prefix; 242545b44d76SStefan Weinhuber #if defined(CONFIG_64BIT) 2426f3eb5384SStefan Weinhuber int fcx_in_css, fcx_in_gneq, fcx_in_features; 242745b44d76SStefan Weinhuber #endif 242845b44d76SStefan Weinhuber struct dasd_eckd_private *private; 2429f3eb5384SStefan Weinhuber struct dasd_device *basedev; 2430f3eb5384SStefan Weinhuber sector_t first_rec, last_rec; 2431f3eb5384SStefan Weinhuber sector_t first_trk, last_trk; 2432f3eb5384SStefan Weinhuber unsigned int first_offs, last_offs; 2433f3eb5384SStefan Weinhuber unsigned int blk_per_trk, blksize; 2434f3eb5384SStefan Weinhuber int cdlspecial; 2435f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 2436f3eb5384SStefan Weinhuber 2437f3eb5384SStefan Weinhuber basedev = block->base; 2438f3eb5384SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 2439f3eb5384SStefan Weinhuber 2440f3eb5384SStefan Weinhuber /* Calculate number of blocks/records per track. */ 2441f3eb5384SStefan Weinhuber blksize = block->bp_block; 2442f3eb5384SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 24436fca97a9SStefan Haberland if (blk_per_trk == 0) 24446fca97a9SStefan Haberland return ERR_PTR(-EINVAL); 2445f3eb5384SStefan Weinhuber /* Calculate record id of first and last block. */ 244683096ebfSTejun Heo first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; 2447f3eb5384SStefan Weinhuber first_offs = sector_div(first_trk, blk_per_trk); 2448f3eb5384SStefan Weinhuber last_rec = last_trk = 244983096ebfSTejun Heo (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 2450f3eb5384SStefan Weinhuber last_offs = sector_div(last_trk, blk_per_trk); 2451f3eb5384SStefan Weinhuber cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); 2452f3eb5384SStefan Weinhuber 2453f3eb5384SStefan Weinhuber /* is transport mode supported? */ 245445b44d76SStefan Weinhuber #if defined(CONFIG_64BIT) 2455f3eb5384SStefan Weinhuber fcx_in_css = css_general_characteristics.fcx; 2456f3eb5384SStefan Weinhuber fcx_in_gneq = private->gneq->reserved2[7] & 0x04; 2457f3eb5384SStefan Weinhuber fcx_in_features = private->features.feature[40] & 0x80; 2458f3eb5384SStefan Weinhuber tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; 245945b44d76SStefan Weinhuber #else 246045b44d76SStefan Weinhuber tpm = 0; 246145b44d76SStefan Weinhuber #endif 2462f3eb5384SStefan Weinhuber 2463f3eb5384SStefan Weinhuber /* is read track data and write track data in command mode supported? */ 2464f3eb5384SStefan Weinhuber cmdrtd = private->features.feature[9] & 0x20; 2465f3eb5384SStefan Weinhuber cmdwtd = private->features.feature[12] & 0x40; 2466f3eb5384SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 2467f3eb5384SStefan Weinhuber 2468f3eb5384SStefan Weinhuber cqr = NULL; 2469f3eb5384SStefan Weinhuber if (cdlspecial || dasd_page_cache) { 2470f3eb5384SStefan Weinhuber /* do nothing, just fall through to the cmd mode single case */ 2471f3eb5384SStefan Weinhuber } else if (!dasd_nofcx && tpm && (first_trk == last_trk)) { 2472f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, 2473f3eb5384SStefan Weinhuber first_rec, last_rec, 2474f3eb5384SStefan Weinhuber first_trk, last_trk, 2475f3eb5384SStefan Weinhuber first_offs, last_offs, 2476f3eb5384SStefan Weinhuber blk_per_trk, blksize); 2477f3eb5384SStefan Weinhuber if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN) 2478f3eb5384SStefan Weinhuber cqr = NULL; 2479f3eb5384SStefan Weinhuber } else if (use_prefix && 2480f3eb5384SStefan Weinhuber (((rq_data_dir(req) == READ) && cmdrtd) || 2481f3eb5384SStefan Weinhuber ((rq_data_dir(req) == WRITE) && cmdwtd))) { 2482f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, 2483f3eb5384SStefan Weinhuber first_rec, last_rec, 2484f3eb5384SStefan Weinhuber first_trk, last_trk, 2485f3eb5384SStefan Weinhuber first_offs, last_offs, 2486f3eb5384SStefan Weinhuber blk_per_trk, blksize); 2487f3eb5384SStefan Weinhuber if (IS_ERR(cqr) && PTR_ERR(cqr) != -EAGAIN) 2488f3eb5384SStefan Weinhuber cqr = NULL; 2489f3eb5384SStefan Weinhuber } 2490f3eb5384SStefan Weinhuber if (!cqr) 2491f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, 2492f3eb5384SStefan Weinhuber first_rec, last_rec, 2493f3eb5384SStefan Weinhuber first_trk, last_trk, 2494f3eb5384SStefan Weinhuber first_offs, last_offs, 2495f3eb5384SStefan Weinhuber blk_per_trk, blksize); 2496f3eb5384SStefan Weinhuber return cqr; 2497f3eb5384SStefan Weinhuber } 2498f3eb5384SStefan Weinhuber 24991da177e4SLinus Torvalds static int 25001da177e4SLinus Torvalds dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 25011da177e4SLinus Torvalds { 25021da177e4SLinus Torvalds struct dasd_eckd_private *private; 25031da177e4SLinus Torvalds struct ccw1 *ccw; 25045705f702SNeilBrown struct req_iterator iter; 25051da177e4SLinus Torvalds struct bio_vec *bv; 25061da177e4SLinus Torvalds char *dst, *cda; 25071da177e4SLinus Torvalds unsigned int blksize, blk_per_trk, off; 25081da177e4SLinus Torvalds sector_t recid; 25095705f702SNeilBrown int status; 25101da177e4SLinus Torvalds 25111da177e4SLinus Torvalds if (!dasd_page_cache) 25121da177e4SLinus Torvalds goto out; 25138e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) cqr->block->base->private; 25148e09f215SStefan Weinhuber blksize = cqr->block->bp_block; 25151da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 251683096ebfSTejun Heo recid = blk_rq_pos(req) >> cqr->block->s2b_shift; 25171da177e4SLinus Torvalds ccw = cqr->cpaddr; 25181da177e4SLinus Torvalds /* Skip over define extent & locate record. */ 25191da177e4SLinus Torvalds ccw++; 25201da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 25211da177e4SLinus Torvalds ccw++; 25225705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 25231da177e4SLinus Torvalds dst = page_address(bv->bv_page) + bv->bv_offset; 25241da177e4SLinus Torvalds for (off = 0; off < bv->bv_len; off += blksize) { 25251da177e4SLinus Torvalds /* Skip locate record. */ 25261da177e4SLinus Torvalds if (private->uses_cdl && recid <= 2*blk_per_trk) 25271da177e4SLinus Torvalds ccw++; 25281da177e4SLinus Torvalds if (dst) { 25291da177e4SLinus Torvalds if (ccw->flags & CCW_FLAG_IDA) 25301da177e4SLinus Torvalds cda = *((char **)((addr_t) ccw->cda)); 25311da177e4SLinus Torvalds else 25321da177e4SLinus Torvalds cda = (char *)((addr_t) ccw->cda); 25331da177e4SLinus Torvalds if (dst != cda) { 25341da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 25351da177e4SLinus Torvalds memcpy(dst, cda, bv->bv_len); 25361da177e4SLinus Torvalds kmem_cache_free(dasd_page_cache, 25371da177e4SLinus Torvalds (void *)((addr_t)cda & PAGE_MASK)); 25381da177e4SLinus Torvalds } 25391da177e4SLinus Torvalds dst = NULL; 25401da177e4SLinus Torvalds } 25411da177e4SLinus Torvalds ccw++; 25421da177e4SLinus Torvalds recid++; 25431da177e4SLinus Torvalds } 25441da177e4SLinus Torvalds } 25451da177e4SLinus Torvalds out: 25461da177e4SLinus Torvalds status = cqr->status == DASD_CQR_DONE; 25478e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 25481da177e4SLinus Torvalds return status; 25491da177e4SLinus Torvalds } 25501da177e4SLinus Torvalds 25518e09f215SStefan Weinhuber /* 2552f3eb5384SStefan Weinhuber * Modify ccw/tcw in cqr so it can be started on a base device. 25538e09f215SStefan Weinhuber * 25548e09f215SStefan Weinhuber * Note that this is not enough to restart the cqr! 25558e09f215SStefan Weinhuber * Either reset cqr->startdev as well (summary unit check handling) 25568e09f215SStefan Weinhuber * or restart via separate cqr (as in ERP handling). 25578e09f215SStefan Weinhuber */ 25588e09f215SStefan Weinhuber void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 25598e09f215SStefan Weinhuber { 25608e09f215SStefan Weinhuber struct ccw1 *ccw; 25618e09f215SStefan Weinhuber struct PFX_eckd_data *pfxdata; 2562f3eb5384SStefan Weinhuber struct tcw *tcw; 2563f3eb5384SStefan Weinhuber struct tccb *tccb; 2564f3eb5384SStefan Weinhuber struct dcw *dcw; 25658e09f215SStefan Weinhuber 2566f3eb5384SStefan Weinhuber if (cqr->cpmode == 1) { 2567f3eb5384SStefan Weinhuber tcw = cqr->cpaddr; 2568f3eb5384SStefan Weinhuber tccb = tcw_get_tccb(tcw); 2569f3eb5384SStefan Weinhuber dcw = (struct dcw *)&tccb->tca[0]; 2570f3eb5384SStefan Weinhuber pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; 2571f3eb5384SStefan Weinhuber pfxdata->validity.verify_base = 0; 2572f3eb5384SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 2573f3eb5384SStefan Weinhuber } else { 25748e09f215SStefan Weinhuber ccw = cqr->cpaddr; 25758e09f215SStefan Weinhuber pfxdata = cqr->data; 25768e09f215SStefan Weinhuber if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 25778e09f215SStefan Weinhuber pfxdata->validity.verify_base = 0; 25788e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 25798e09f215SStefan Weinhuber } 25808e09f215SStefan Weinhuber } 2581f3eb5384SStefan Weinhuber } 25828e09f215SStefan Weinhuber 25838e09f215SStefan Weinhuber #define DASD_ECKD_CHANQ_MAX_SIZE 4 25848e09f215SStefan Weinhuber 25858e09f215SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 25868e09f215SStefan Weinhuber struct dasd_block *block, 25878e09f215SStefan Weinhuber struct request *req) 25888e09f215SStefan Weinhuber { 25898e09f215SStefan Weinhuber struct dasd_eckd_private *private; 25908e09f215SStefan Weinhuber struct dasd_device *startdev; 25918e09f215SStefan Weinhuber unsigned long flags; 25928e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 25938e09f215SStefan Weinhuber 25948e09f215SStefan Weinhuber startdev = dasd_alias_get_start_dev(base); 25958e09f215SStefan Weinhuber if (!startdev) 25968e09f215SStefan Weinhuber startdev = base; 25978e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) startdev->private; 25988e09f215SStefan Weinhuber if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 25998e09f215SStefan Weinhuber return ERR_PTR(-EBUSY); 26008e09f215SStefan Weinhuber 26018e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 26028e09f215SStefan Weinhuber private->count++; 26038e09f215SStefan Weinhuber cqr = dasd_eckd_build_cp(startdev, block, req); 26048e09f215SStefan Weinhuber if (IS_ERR(cqr)) 26058e09f215SStefan Weinhuber private->count--; 26068e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 26078e09f215SStefan Weinhuber return cqr; 26088e09f215SStefan Weinhuber } 26098e09f215SStefan Weinhuber 26108e09f215SStefan Weinhuber static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 26118e09f215SStefan Weinhuber struct request *req) 26128e09f215SStefan Weinhuber { 26138e09f215SStefan Weinhuber struct dasd_eckd_private *private; 26148e09f215SStefan Weinhuber unsigned long flags; 26158e09f215SStefan Weinhuber 26168e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 26178e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) cqr->memdev->private; 26188e09f215SStefan Weinhuber private->count--; 26198e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 26208e09f215SStefan Weinhuber return dasd_eckd_free_cp(cqr, req); 26218e09f215SStefan Weinhuber } 26228e09f215SStefan Weinhuber 26231da177e4SLinus Torvalds static int 26241da177e4SLinus Torvalds dasd_eckd_fill_info(struct dasd_device * device, 26251da177e4SLinus Torvalds struct dasd_information2_t * info) 26261da177e4SLinus Torvalds { 26271da177e4SLinus Torvalds struct dasd_eckd_private *private; 26281da177e4SLinus Torvalds 26291da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 26301da177e4SLinus Torvalds info->label_block = 2; 26311da177e4SLinus Torvalds info->FBA_layout = private->uses_cdl ? 0 : 1; 26321da177e4SLinus Torvalds info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 26331da177e4SLinus Torvalds info->characteristics_size = sizeof(struct dasd_eckd_characteristics); 26341da177e4SLinus Torvalds memcpy(info->characteristics, &private->rdc_data, 26351da177e4SLinus Torvalds sizeof(struct dasd_eckd_characteristics)); 26364abb08c2SStefan Weinhuber info->confdata_size = min((unsigned long)private->conf_len, 26374abb08c2SStefan Weinhuber sizeof(info->configuration_data)); 26384abb08c2SStefan Weinhuber memcpy(info->configuration_data, private->conf_data, 26394abb08c2SStefan Weinhuber info->confdata_size); 26401da177e4SLinus Torvalds return 0; 26411da177e4SLinus Torvalds } 26421da177e4SLinus Torvalds 26431da177e4SLinus Torvalds /* 26441da177e4SLinus Torvalds * SECTION: ioctl functions for eckd devices. 26451da177e4SLinus Torvalds */ 26461da177e4SLinus Torvalds 26471da177e4SLinus Torvalds /* 26481da177e4SLinus Torvalds * Release device ioctl. 26491da177e4SLinus Torvalds * Buils a channel programm to releases a prior reserved 26501da177e4SLinus Torvalds * (see dasd_eckd_reserve) device. 26511da177e4SLinus Torvalds */ 26521da177e4SLinus Torvalds static int 26531107ccfbSChristoph Hellwig dasd_eckd_release(struct dasd_device *device) 26541da177e4SLinus Torvalds { 26551da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 26561da177e4SLinus Torvalds int rc; 2657f3eb5384SStefan Weinhuber struct ccw1 *ccw; 2658f932bceaSStefan Weinhuber int useglobal; 26591da177e4SLinus Torvalds 26601da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 26611da177e4SLinus Torvalds return -EACCES; 26621da177e4SLinus Torvalds 2663f932bceaSStefan Weinhuber useglobal = 0; 266468b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 26651da177e4SLinus Torvalds if (IS_ERR(cqr)) { 2666f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 2667f932bceaSStefan Weinhuber useglobal = 1; 2668f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 2669f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 2670f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 2671f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 2672f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 2673f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 2674f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 26751da177e4SLinus Torvalds } 2676f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 2677f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RELEASE; 2678f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 2679f3eb5384SStefan Weinhuber ccw->count = 32; 2680f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 26818e09f215SStefan Weinhuber cqr->startdev = device; 26828e09f215SStefan Weinhuber cqr->memdev = device; 26831da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 26841c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2685336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 26861da177e4SLinus Torvalds cqr->expires = 2 * HZ; 26871da177e4SLinus Torvalds cqr->buildclk = get_clock(); 26881da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 26891da177e4SLinus Torvalds 26901da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 26911da177e4SLinus Torvalds 2692f932bceaSStefan Weinhuber if (useglobal) 2693f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 2694f932bceaSStefan Weinhuber else 26958e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 26961da177e4SLinus Torvalds return rc; 26971da177e4SLinus Torvalds } 26981da177e4SLinus Torvalds 26991da177e4SLinus Torvalds /* 27001da177e4SLinus Torvalds * Reserve device ioctl. 27011da177e4SLinus Torvalds * Options are set to 'synchronous wait for interrupt' and 27021da177e4SLinus Torvalds * 'timeout the request'. This leads to a terminate IO if 27031da177e4SLinus Torvalds * the interrupt is outstanding for a certain time. 27041da177e4SLinus Torvalds */ 27051da177e4SLinus Torvalds static int 27061107ccfbSChristoph Hellwig dasd_eckd_reserve(struct dasd_device *device) 27071da177e4SLinus Torvalds { 27081da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 27091da177e4SLinus Torvalds int rc; 2710f3eb5384SStefan Weinhuber struct ccw1 *ccw; 2711f932bceaSStefan Weinhuber int useglobal; 27121da177e4SLinus Torvalds 27131da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 27141da177e4SLinus Torvalds return -EACCES; 27151da177e4SLinus Torvalds 2716f932bceaSStefan Weinhuber useglobal = 0; 271768b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 27181da177e4SLinus Torvalds if (IS_ERR(cqr)) { 2719f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 2720f932bceaSStefan Weinhuber useglobal = 1; 2721f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 2722f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 2723f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 2724f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 2725f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 2726f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 2727f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 27281da177e4SLinus Torvalds } 2729f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 2730f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RESERVE; 2731f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 2732f3eb5384SStefan Weinhuber ccw->count = 32; 2733f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 27348e09f215SStefan Weinhuber cqr->startdev = device; 27358e09f215SStefan Weinhuber cqr->memdev = device; 27361da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 27371c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2738336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 27391da177e4SLinus Torvalds cqr->expires = 2 * HZ; 27401da177e4SLinus Torvalds cqr->buildclk = get_clock(); 27411da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 27421da177e4SLinus Torvalds 27431da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 27441da177e4SLinus Torvalds 2745f932bceaSStefan Weinhuber if (useglobal) 2746f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 2747f932bceaSStefan Weinhuber else 27488e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 27491da177e4SLinus Torvalds return rc; 27501da177e4SLinus Torvalds } 27511da177e4SLinus Torvalds 27521da177e4SLinus Torvalds /* 27531da177e4SLinus Torvalds * Steal lock ioctl - unconditional reserve device. 27541da177e4SLinus Torvalds * Buils a channel programm to break a device's reservation. 27551da177e4SLinus Torvalds * (unconditional reserve) 27561da177e4SLinus Torvalds */ 27571da177e4SLinus Torvalds static int 27581107ccfbSChristoph Hellwig dasd_eckd_steal_lock(struct dasd_device *device) 27591da177e4SLinus Torvalds { 27601da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 27611da177e4SLinus Torvalds int rc; 2762f3eb5384SStefan Weinhuber struct ccw1 *ccw; 2763f932bceaSStefan Weinhuber int useglobal; 27641da177e4SLinus Torvalds 27651da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 27661da177e4SLinus Torvalds return -EACCES; 27671da177e4SLinus Torvalds 2768f932bceaSStefan Weinhuber useglobal = 0; 276968b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 27701da177e4SLinus Torvalds if (IS_ERR(cqr)) { 2771f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 2772f932bceaSStefan Weinhuber useglobal = 1; 2773f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 2774f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 2775f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 2776f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 2777f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 2778f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 2779f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 27801da177e4SLinus Torvalds } 2781f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 2782f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SLCK; 2783f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 2784f3eb5384SStefan Weinhuber ccw->count = 32; 2785f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 27868e09f215SStefan Weinhuber cqr->startdev = device; 27878e09f215SStefan Weinhuber cqr->memdev = device; 27881da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 27891c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2790336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 27911da177e4SLinus Torvalds cqr->expires = 2 * HZ; 27921da177e4SLinus Torvalds cqr->buildclk = get_clock(); 27931da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 27941da177e4SLinus Torvalds 27951da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 27961da177e4SLinus Torvalds 2797f932bceaSStefan Weinhuber if (useglobal) 2798f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 2799f932bceaSStefan Weinhuber else 28008e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 28011da177e4SLinus Torvalds return rc; 28021da177e4SLinus Torvalds } 28031da177e4SLinus Torvalds 28041da177e4SLinus Torvalds /* 28051da177e4SLinus Torvalds * Read performance statistics 28061da177e4SLinus Torvalds */ 28071da177e4SLinus Torvalds static int 28081107ccfbSChristoph Hellwig dasd_eckd_performance(struct dasd_device *device, void __user *argp) 28091da177e4SLinus Torvalds { 28101da177e4SLinus Torvalds struct dasd_psf_prssd_data *prssdp; 28111da177e4SLinus Torvalds struct dasd_rssd_perf_stats_t *stats; 28121da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 28131da177e4SLinus Torvalds struct ccw1 *ccw; 28141da177e4SLinus Torvalds int rc; 28151da177e4SLinus Torvalds 281668b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 28171da177e4SLinus Torvalds (sizeof(struct dasd_psf_prssd_data) + 28181da177e4SLinus Torvalds sizeof(struct dasd_rssd_perf_stats_t)), 28191da177e4SLinus Torvalds device); 28201da177e4SLinus Torvalds if (IS_ERR(cqr)) { 2821fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 28221da177e4SLinus Torvalds "Could not allocate initialization request"); 28231da177e4SLinus Torvalds return PTR_ERR(cqr); 28241da177e4SLinus Torvalds } 28258e09f215SStefan Weinhuber cqr->startdev = device; 28268e09f215SStefan Weinhuber cqr->memdev = device; 28271da177e4SLinus Torvalds cqr->retries = 0; 2828eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 28291da177e4SLinus Torvalds cqr->expires = 10 * HZ; 28301da177e4SLinus Torvalds 28311da177e4SLinus Torvalds /* Prepare for Read Subsystem Data */ 28321da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 28331da177e4SLinus Torvalds memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 28341da177e4SLinus Torvalds prssdp->order = PSF_ORDER_PRSSD; 28355d67d164SJoe Perches prssdp->suborder = 0x01; /* Performance Statistics */ 28361da177e4SLinus Torvalds prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 28371da177e4SLinus Torvalds 28381da177e4SLinus Torvalds ccw = cqr->cpaddr; 28391da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_PSF; 28401da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_psf_prssd_data); 28411da177e4SLinus Torvalds ccw->flags |= CCW_FLAG_CC; 28421da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) prssdp; 28431da177e4SLinus Torvalds 28441da177e4SLinus Torvalds /* Read Subsystem Data - Performance Statistics */ 28451da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 28461da177e4SLinus Torvalds memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 28471da177e4SLinus Torvalds 28481da177e4SLinus Torvalds ccw++; 28491da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_RSSD; 28501da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 28511da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) stats; 28521da177e4SLinus Torvalds 28531da177e4SLinus Torvalds cqr->buildclk = get_clock(); 28541da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 28551da177e4SLinus Torvalds rc = dasd_sleep_on(cqr); 28561da177e4SLinus Torvalds if (rc == 0) { 28571da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 28581da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 28591107ccfbSChristoph Hellwig if (copy_to_user(argp, stats, 28601107ccfbSChristoph Hellwig sizeof(struct dasd_rssd_perf_stats_t))) 28611107ccfbSChristoph Hellwig rc = -EFAULT; 28621da177e4SLinus Torvalds } 28638e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 28641da177e4SLinus Torvalds return rc; 28651da177e4SLinus Torvalds } 28661da177e4SLinus Torvalds 28671da177e4SLinus Torvalds /* 28681da177e4SLinus Torvalds * Get attributes (cache operations) 28691da177e4SLinus Torvalds * Returnes the cache attributes used in Define Extend (DE). 28701da177e4SLinus Torvalds */ 28711da177e4SLinus Torvalds static int 28721107ccfbSChristoph Hellwig dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 28731da177e4SLinus Torvalds { 28741107ccfbSChristoph Hellwig struct dasd_eckd_private *private = 28751107ccfbSChristoph Hellwig (struct dasd_eckd_private *)device->private; 28761107ccfbSChristoph Hellwig struct attrib_data_t attrib = private->attrib; 28771da177e4SLinus Torvalds int rc; 28781da177e4SLinus Torvalds 28791da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 28801da177e4SLinus Torvalds return -EACCES; 28811107ccfbSChristoph Hellwig if (!argp) 28821da177e4SLinus Torvalds return -EINVAL; 28831da177e4SLinus Torvalds 28841107ccfbSChristoph Hellwig rc = 0; 28851107ccfbSChristoph Hellwig if (copy_to_user(argp, (long *) &attrib, 28861107ccfbSChristoph Hellwig sizeof(struct attrib_data_t))) 28871107ccfbSChristoph Hellwig rc = -EFAULT; 28881da177e4SLinus Torvalds 28891da177e4SLinus Torvalds return rc; 28901da177e4SLinus Torvalds } 28911da177e4SLinus Torvalds 28921da177e4SLinus Torvalds /* 28931da177e4SLinus Torvalds * Set attributes (cache operations) 28941da177e4SLinus Torvalds * Stores the attributes for cache operation to be used in Define Extend (DE). 28951da177e4SLinus Torvalds */ 28961da177e4SLinus Torvalds static int 28971107ccfbSChristoph Hellwig dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 28981da177e4SLinus Torvalds { 28991107ccfbSChristoph Hellwig struct dasd_eckd_private *private = 29001107ccfbSChristoph Hellwig (struct dasd_eckd_private *)device->private; 29011da177e4SLinus Torvalds struct attrib_data_t attrib; 29021da177e4SLinus Torvalds 29031da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 29041da177e4SLinus Torvalds return -EACCES; 29051107ccfbSChristoph Hellwig if (!argp) 29061da177e4SLinus Torvalds return -EINVAL; 29071da177e4SLinus Torvalds 29081107ccfbSChristoph Hellwig if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 29091da177e4SLinus Torvalds return -EFAULT; 29101da177e4SLinus Torvalds private->attrib = attrib; 29111da177e4SLinus Torvalds 2912fc19f381SStefan Haberland dev_info(&device->cdev->dev, 2913fc19f381SStefan Haberland "The DASD cache mode was set to %x (%i cylinder prestage)\n", 29141da177e4SLinus Torvalds private->attrib.operation, private->attrib.nr_cyl); 29151da177e4SLinus Torvalds return 0; 29161da177e4SLinus Torvalds } 29171da177e4SLinus Torvalds 2918ab1d848fSNigel Hislop /* 2919ab1d848fSNigel Hislop * Issue syscall I/O to EMC Symmetrix array. 2920ab1d848fSNigel Hislop * CCWs are PSF and RSSD 2921ab1d848fSNigel Hislop */ 2922ab1d848fSNigel Hislop static int dasd_symm_io(struct dasd_device *device, void __user *argp) 2923ab1d848fSNigel Hislop { 2924ab1d848fSNigel Hislop struct dasd_symmio_parms usrparm; 2925ab1d848fSNigel Hislop char *psf_data, *rssd_result; 2926ab1d848fSNigel Hislop struct dasd_ccw_req *cqr; 2927ab1d848fSNigel Hislop struct ccw1 *ccw; 292852898025SNigel Hislop char psf0, psf1; 2929ab1d848fSNigel Hislop int rc; 2930ab1d848fSNigel Hislop 293152898025SNigel Hislop if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) 293252898025SNigel Hislop return -EACCES; 293352898025SNigel Hislop psf0 = psf1 = 0; 293452898025SNigel Hislop 2935ab1d848fSNigel Hislop /* Copy parms from caller */ 2936ab1d848fSNigel Hislop rc = -EFAULT; 2937ab1d848fSNigel Hislop if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 2938ab1d848fSNigel Hislop goto out; 2939f8b06859SHeiko Carstens if (is_compat_task() || sizeof(long) == 4) { 2940ab1d848fSNigel Hislop /* Make sure pointers are sane even on 31 bit. */ 2941ab1d848fSNigel Hislop rc = -EINVAL; 2942f8b06859SHeiko Carstens if ((usrparm.psf_data >> 32) != 0) 2943ab1d848fSNigel Hislop goto out; 2944f8b06859SHeiko Carstens if ((usrparm.rssd_result >> 32) != 0) 2945f8b06859SHeiko Carstens goto out; 2946f8b06859SHeiko Carstens usrparm.psf_data &= 0x7fffffffULL; 2947f8b06859SHeiko Carstens usrparm.rssd_result &= 0x7fffffffULL; 2948ab1d848fSNigel Hislop } 2949ab1d848fSNigel Hislop /* alloc I/O data area */ 2950ab1d848fSNigel Hislop psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 2951ab1d848fSNigel Hislop rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 2952ab1d848fSNigel Hislop if (!psf_data || !rssd_result) { 2953ab1d848fSNigel Hislop rc = -ENOMEM; 2954ab1d848fSNigel Hislop goto out_free; 2955ab1d848fSNigel Hislop } 2956ab1d848fSNigel Hislop 2957ab1d848fSNigel Hislop /* get syscall header from user space */ 2958ab1d848fSNigel Hislop rc = -EFAULT; 2959ab1d848fSNigel Hislop if (copy_from_user(psf_data, 2960ab1d848fSNigel Hislop (void __user *)(unsigned long) usrparm.psf_data, 2961ab1d848fSNigel Hislop usrparm.psf_data_len)) 2962ab1d848fSNigel Hislop goto out_free; 296352898025SNigel Hislop psf0 = psf_data[0]; 296452898025SNigel Hislop psf1 = psf_data[1]; 2965ab1d848fSNigel Hislop 2966ab1d848fSNigel Hislop /* setup CCWs for PSF + RSSD */ 296768b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device); 2968ab1d848fSNigel Hislop if (IS_ERR(cqr)) { 2969fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 2970ab1d848fSNigel Hislop "Could not allocate initialization request"); 2971ab1d848fSNigel Hislop rc = PTR_ERR(cqr); 2972ab1d848fSNigel Hislop goto out_free; 2973ab1d848fSNigel Hislop } 2974ab1d848fSNigel Hislop 2975ab1d848fSNigel Hislop cqr->startdev = device; 2976ab1d848fSNigel Hislop cqr->memdev = device; 2977ab1d848fSNigel Hislop cqr->retries = 3; 2978ab1d848fSNigel Hislop cqr->expires = 10 * HZ; 2979ab1d848fSNigel Hislop cqr->buildclk = get_clock(); 2980ab1d848fSNigel Hislop cqr->status = DASD_CQR_FILLED; 2981ab1d848fSNigel Hislop 2982ab1d848fSNigel Hislop /* Build the ccws */ 2983ab1d848fSNigel Hislop ccw = cqr->cpaddr; 2984ab1d848fSNigel Hislop 2985ab1d848fSNigel Hislop /* PSF ccw */ 2986ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_PSF; 2987ab1d848fSNigel Hislop ccw->count = usrparm.psf_data_len; 2988ab1d848fSNigel Hislop ccw->flags |= CCW_FLAG_CC; 2989ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) psf_data; 2990ab1d848fSNigel Hislop 2991ab1d848fSNigel Hislop ccw++; 2992ab1d848fSNigel Hislop 2993ab1d848fSNigel Hislop /* RSSD ccw */ 2994ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_RSSD; 2995ab1d848fSNigel Hislop ccw->count = usrparm.rssd_result_len; 2996ab1d848fSNigel Hislop ccw->flags = CCW_FLAG_SLI ; 2997ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) rssd_result; 2998ab1d848fSNigel Hislop 2999ab1d848fSNigel Hislop rc = dasd_sleep_on(cqr); 3000ab1d848fSNigel Hislop if (rc) 3001ab1d848fSNigel Hislop goto out_sfree; 3002ab1d848fSNigel Hislop 3003ab1d848fSNigel Hislop rc = -EFAULT; 3004ab1d848fSNigel Hislop if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 3005ab1d848fSNigel Hislop rssd_result, usrparm.rssd_result_len)) 3006ab1d848fSNigel Hislop goto out_sfree; 3007ab1d848fSNigel Hislop rc = 0; 3008ab1d848fSNigel Hislop 3009ab1d848fSNigel Hislop out_sfree: 3010ab1d848fSNigel Hislop dasd_sfree_request(cqr, cqr->memdev); 3011ab1d848fSNigel Hislop out_free: 3012ab1d848fSNigel Hislop kfree(rssd_result); 3013ab1d848fSNigel Hislop kfree(psf_data); 3014ab1d848fSNigel Hislop out: 301552898025SNigel Hislop DBF_DEV_EVENT(DBF_WARNING, device, 301652898025SNigel Hislop "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", 301752898025SNigel Hislop (int) psf0, (int) psf1, rc); 3018ab1d848fSNigel Hislop return rc; 3019ab1d848fSNigel Hislop } 3020ab1d848fSNigel Hislop 30211107ccfbSChristoph Hellwig static int 30228e09f215SStefan Weinhuber dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 30231107ccfbSChristoph Hellwig { 30248e09f215SStefan Weinhuber struct dasd_device *device = block->base; 30258e09f215SStefan Weinhuber 30261107ccfbSChristoph Hellwig switch (cmd) { 30271107ccfbSChristoph Hellwig case BIODASDGATTR: 30281107ccfbSChristoph Hellwig return dasd_eckd_get_attrib(device, argp); 30291107ccfbSChristoph Hellwig case BIODASDSATTR: 30301107ccfbSChristoph Hellwig return dasd_eckd_set_attrib(device, argp); 30311107ccfbSChristoph Hellwig case BIODASDPSRD: 30321107ccfbSChristoph Hellwig return dasd_eckd_performance(device, argp); 30331107ccfbSChristoph Hellwig case BIODASDRLSE: 30341107ccfbSChristoph Hellwig return dasd_eckd_release(device); 30351107ccfbSChristoph Hellwig case BIODASDRSRV: 30361107ccfbSChristoph Hellwig return dasd_eckd_reserve(device); 30371107ccfbSChristoph Hellwig case BIODASDSLCK: 30381107ccfbSChristoph Hellwig return dasd_eckd_steal_lock(device); 3039ab1d848fSNigel Hislop case BIODASDSYMMIO: 3040ab1d848fSNigel Hislop return dasd_symm_io(device, argp); 30411107ccfbSChristoph Hellwig default: 30421107ccfbSChristoph Hellwig return -ENOIOCTLCMD; 30431107ccfbSChristoph Hellwig } 30441107ccfbSChristoph Hellwig } 30451107ccfbSChristoph Hellwig 30461da177e4SLinus Torvalds /* 3047445b5b49SHorst Hummel * Dump the range of CCWs into 'page' buffer 3048445b5b49SHorst Hummel * and return number of printed chars. 3049445b5b49SHorst Hummel */ 30504d284cacSHeiko Carstens static int 3051445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 3052445b5b49SHorst Hummel { 3053445b5b49SHorst Hummel int len, count; 3054445b5b49SHorst Hummel char *datap; 3055445b5b49SHorst Hummel 3056445b5b49SHorst Hummel len = 0; 3057445b5b49SHorst Hummel while (from <= to) { 3058445b5b49SHorst Hummel len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3059445b5b49SHorst Hummel " CCW %p: %08X %08X DAT:", 3060445b5b49SHorst Hummel from, ((int *) from)[0], ((int *) from)[1]); 3061445b5b49SHorst Hummel 3062445b5b49SHorst Hummel /* get pointer to data (consider IDALs) */ 3063445b5b49SHorst Hummel if (from->flags & CCW_FLAG_IDA) 3064445b5b49SHorst Hummel datap = (char *) *((addr_t *) (addr_t) from->cda); 3065445b5b49SHorst Hummel else 3066445b5b49SHorst Hummel datap = (char *) ((addr_t) from->cda); 3067445b5b49SHorst Hummel 3068445b5b49SHorst Hummel /* dump data (max 32 bytes) */ 3069445b5b49SHorst Hummel for (count = 0; count < from->count && count < 32; count++) { 3070445b5b49SHorst Hummel if (count % 8 == 0) len += sprintf(page + len, " "); 3071445b5b49SHorst Hummel if (count % 4 == 0) len += sprintf(page + len, " "); 3072445b5b49SHorst Hummel len += sprintf(page + len, "%02x", datap[count]); 3073445b5b49SHorst Hummel } 3074445b5b49SHorst Hummel len += sprintf(page + len, "\n"); 3075445b5b49SHorst Hummel from++; 3076445b5b49SHorst Hummel } 3077445b5b49SHorst Hummel return len; 3078445b5b49SHorst Hummel } 3079445b5b49SHorst Hummel 3080fc19f381SStefan Haberland static void 3081aeec92caSStefan Haberland dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 3082aeec92caSStefan Haberland char *reason) 3083fc19f381SStefan Haberland { 3084fc19f381SStefan Haberland u64 *sense; 3085a5a0061fSStefan Weinhuber u64 *stat; 3086fc19f381SStefan Haberland 3087aeec92caSStefan Haberland sense = (u64 *) dasd_get_sense(irb); 3088a5a0061fSStefan Weinhuber stat = (u64 *) &irb->scsw; 3089fc19f381SStefan Haberland if (sense) { 3090a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " 3091a5a0061fSStefan Weinhuber "%016llx %016llx %016llx %016llx", 3092a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 3093ed3640b2SStefan Haberland sense[0], sense[1], sense[2], sense[3]); 3094fc19f381SStefan Haberland } else { 3095a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", 3096a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 3097a5a0061fSStefan Weinhuber "NO VALID SENSE"); 3098fc19f381SStefan Haberland } 3099fc19f381SStefan Haberland } 3100fc19f381SStefan Haberland 3101445b5b49SHorst Hummel /* 31021da177e4SLinus Torvalds * Print sense data and related channel program. 31031da177e4SLinus Torvalds * Parts are printed because printk buffer is only 1024 bytes. 31041da177e4SLinus Torvalds */ 3105f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 31068e09f215SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 31071da177e4SLinus Torvalds { 31081da177e4SLinus Torvalds char *page; 3109445b5b49SHorst Hummel struct ccw1 *first, *last, *fail, *from, *to; 3110445b5b49SHorst Hummel int len, sl, sct; 31111da177e4SLinus Torvalds 31121da177e4SLinus Torvalds page = (char *) get_zeroed_page(GFP_ATOMIC); 31131da177e4SLinus Torvalds if (page == NULL) { 3114fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3115fc19f381SStefan Haberland "No memory to dump sense data\n"); 31161da177e4SLinus Torvalds return; 31171da177e4SLinus Torvalds } 3118445b5b49SHorst Hummel /* dump the sense data */ 31191da177e4SLinus Torvalds len = sprintf(page, KERN_ERR PRINTK_HEADER 31201da177e4SLinus Torvalds " I/O status report for device %s:\n", 31212a0217d5SKay Sievers dev_name(&device->cdev->dev)); 31221da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3123a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 3124a5a0061fSStefan Weinhuber "CS:%02X RC:%d\n", 3125a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 3126a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 3127a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 3128a5a0061fSStefan Weinhuber req ? req->intrc : 0); 31291da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 31301da177e4SLinus Torvalds " device %s: Failing CCW: %p\n", 31312a0217d5SKay Sievers dev_name(&device->cdev->dev), 313223d805b6SPeter Oberparleiter (void *) (addr_t) irb->scsw.cmd.cpa); 31331da177e4SLinus Torvalds if (irb->esw.esw0.erw.cons) { 31341da177e4SLinus Torvalds for (sl = 0; sl < 4; sl++) { 31351da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 31361da177e4SLinus Torvalds " Sense(hex) %2d-%2d:", 31371da177e4SLinus Torvalds (8 * sl), ((8 * sl) + 7)); 31381da177e4SLinus Torvalds 31391da177e4SLinus Torvalds for (sct = 0; sct < 8; sct++) { 31401da177e4SLinus Torvalds len += sprintf(page + len, " %02x", 31411da177e4SLinus Torvalds irb->ecw[8 * sl + sct]); 31421da177e4SLinus Torvalds } 31431da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 31441da177e4SLinus Torvalds } 31451da177e4SLinus Torvalds 31461da177e4SLinus Torvalds if (irb->ecw[27] & DASD_SENSE_BIT_0) { 31471da177e4SLinus Torvalds /* 24 Byte Sense Data */ 3148445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 31491da177e4SLinus Torvalds " 24 Byte: %x MSG %x, " 31501da177e4SLinus Torvalds "%s MSGb to SYSOP\n", 31511da177e4SLinus Torvalds irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 31521da177e4SLinus Torvalds irb->ecw[1] & 0x10 ? "" : "no"); 31531da177e4SLinus Torvalds } else { 31541da177e4SLinus Torvalds /* 32 Byte Sense Data */ 3155445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 31561da177e4SLinus Torvalds " 32 Byte: Format: %x " 31571da177e4SLinus Torvalds "Exception class %x\n", 31581da177e4SLinus Torvalds irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 31591da177e4SLinus Torvalds } 31601da177e4SLinus Torvalds } else { 3161445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 31621da177e4SLinus Torvalds " SORRY - NO VALID SENSE AVAILABLE\n"); 31631da177e4SLinus Torvalds } 3164445b5b49SHorst Hummel printk("%s", page); 31651da177e4SLinus Torvalds 31668e09f215SStefan Weinhuber if (req) { 31678e09f215SStefan Weinhuber /* req == NULL for unsolicited interrupts */ 3168445b5b49SHorst Hummel /* dump the Channel Program (max 140 Bytes per line) */ 3169445b5b49SHorst Hummel /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 3170445b5b49SHorst Hummel first = req->cpaddr; 3171445b5b49SHorst Hummel for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 3172445b5b49SHorst Hummel to = min(first + 6, last); 31731da177e4SLinus Torvalds len = sprintf(page, KERN_ERR PRINTK_HEADER 31741da177e4SLinus Torvalds " Related CP in req: %p\n", req); 3175445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(first, to, page + len); 3176445b5b49SHorst Hummel printk("%s", page); 31771da177e4SLinus Torvalds 3178445b5b49SHorst Hummel /* print failing CCW area (maximum 4) */ 3179445b5b49SHorst Hummel /* scsw->cda is either valid or zero */ 31801da177e4SLinus Torvalds len = 0; 3181445b5b49SHorst Hummel from = ++to; 318223d805b6SPeter Oberparleiter fail = (struct ccw1 *)(addr_t) 318323d805b6SPeter Oberparleiter irb->scsw.cmd.cpa; /* failing CCW */ 3184445b5b49SHorst Hummel if (from < fail - 2) { 3185445b5b49SHorst Hummel from = fail - 2; /* there is a gap - print header */ 3186445b5b49SHorst Hummel len += sprintf(page, KERN_ERR PRINTK_HEADER "......\n"); 31871da177e4SLinus Torvalds } 3188445b5b49SHorst Hummel to = min(fail + 1, last); 3189445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, to, page + len); 31901da177e4SLinus Torvalds 3191445b5b49SHorst Hummel /* print last CCWs (maximum 2) */ 3192445b5b49SHorst Hummel from = max(from, ++to); 3193445b5b49SHorst Hummel if (from < last - 1) { 3194445b5b49SHorst Hummel from = last - 1; /* there is a gap - print header */ 31951da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n"); 31961da177e4SLinus Torvalds } 3197445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, last, page + len); 31981da177e4SLinus Torvalds if (len > 0) 3199445b5b49SHorst Hummel printk("%s", page); 32008e09f215SStefan Weinhuber } 32011da177e4SLinus Torvalds free_page((unsigned long) page); 32021da177e4SLinus Torvalds } 32031da177e4SLinus Torvalds 3204f3eb5384SStefan Weinhuber 3205f3eb5384SStefan Weinhuber /* 3206f3eb5384SStefan Weinhuber * Print sense data from a tcw. 3207f3eb5384SStefan Weinhuber */ 3208f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 3209f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 3210f3eb5384SStefan Weinhuber { 3211f3eb5384SStefan Weinhuber char *page; 3212f3eb5384SStefan Weinhuber int len, sl, sct, residual; 3213f3eb5384SStefan Weinhuber 3214f3eb5384SStefan Weinhuber struct tsb *tsb; 3215f3eb5384SStefan Weinhuber u8 *sense; 3216f3eb5384SStefan Weinhuber 3217f3eb5384SStefan Weinhuber 3218f3eb5384SStefan Weinhuber page = (char *) get_zeroed_page(GFP_ATOMIC); 3219f3eb5384SStefan Weinhuber if (page == NULL) { 3220fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, " %s", 3221f3eb5384SStefan Weinhuber "No memory to dump sense data"); 3222f3eb5384SStefan Weinhuber return; 3223f3eb5384SStefan Weinhuber } 3224f3eb5384SStefan Weinhuber /* dump the sense data */ 3225f3eb5384SStefan Weinhuber len = sprintf(page, KERN_ERR PRINTK_HEADER 3226f3eb5384SStefan Weinhuber " I/O status report for device %s:\n", 3227f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev)); 3228f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3229a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 3230a5a0061fSStefan Weinhuber "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", 3231a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 3232a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 3233a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 3234a5a0061fSStefan Weinhuber irb->scsw.tm.fcxs, irb->scsw.tm.schxs, 3235a5a0061fSStefan Weinhuber req ? req->intrc : 0); 3236f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3237f3eb5384SStefan Weinhuber " device %s: Failing TCW: %p\n", 3238f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev), 3239f3eb5384SStefan Weinhuber (void *) (addr_t) irb->scsw.tm.tcw); 3240f3eb5384SStefan Weinhuber 3241f3eb5384SStefan Weinhuber tsb = NULL; 3242f3eb5384SStefan Weinhuber sense = NULL; 3243a5a0061fSStefan Weinhuber if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) 3244f3eb5384SStefan Weinhuber tsb = tcw_get_tsb( 3245f3eb5384SStefan Weinhuber (struct tcw *)(unsigned long)irb->scsw.tm.tcw); 3246f3eb5384SStefan Weinhuber 3247b8fde722SStefan Haberland if (tsb) { 3248f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3249f3eb5384SStefan Weinhuber " tsb->length %d\n", tsb->length); 3250f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3251f3eb5384SStefan Weinhuber " tsb->flags %x\n", tsb->flags); 3252f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3253f3eb5384SStefan Weinhuber " tsb->dcw_offset %d\n", tsb->dcw_offset); 3254f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3255f3eb5384SStefan Weinhuber " tsb->count %d\n", tsb->count); 3256f3eb5384SStefan Weinhuber residual = tsb->count - 28; 3257f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3258f3eb5384SStefan Weinhuber " residual %d\n", residual); 3259f3eb5384SStefan Weinhuber 3260f3eb5384SStefan Weinhuber switch (tsb->flags & 0x07) { 3261f3eb5384SStefan Weinhuber case 1: /* tsa_iostat */ 3262f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3263f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_time %d\n", 3264f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_time); 3265f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3266f3eb5384SStefan Weinhuber " tsb->tsa.iostat.def_time %d\n", 3267f3eb5384SStefan Weinhuber tsb->tsa.iostat.def_time); 3268f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3269f3eb5384SStefan Weinhuber " tsb->tsa.iostat.queue_time %d\n", 3270f3eb5384SStefan Weinhuber tsb->tsa.iostat.queue_time); 3271f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3272f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_busy_time %d\n", 3273f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_busy_time); 3274f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3275f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_act_time %d\n", 3276f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_act_time); 3277f3eb5384SStefan Weinhuber sense = tsb->tsa.iostat.sense; 3278f3eb5384SStefan Weinhuber break; 3279f3eb5384SStefan Weinhuber case 2: /* ts_ddpc */ 3280f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3281f3eb5384SStefan Weinhuber " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); 3282f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3283f3eb5384SStefan Weinhuber " tsb->tsa.ddpc.rcq: "); 3284f3eb5384SStefan Weinhuber for (sl = 0; sl < 16; sl++) { 3285f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 3286f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 3287f3eb5384SStefan Weinhuber tsb->tsa.ddpc.rcq[sl]); 3288f3eb5384SStefan Weinhuber } 3289f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 3290f3eb5384SStefan Weinhuber } 3291f3eb5384SStefan Weinhuber sense = tsb->tsa.ddpc.sense; 3292f3eb5384SStefan Weinhuber break; 3293f3eb5384SStefan Weinhuber case 3: /* tsa_intrg */ 3294f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3295f3eb5384SStefan Weinhuber " tsb->tsa.intrg.: not supportet yet \n"); 3296f3eb5384SStefan Weinhuber break; 3297f3eb5384SStefan Weinhuber } 3298f3eb5384SStefan Weinhuber 3299f3eb5384SStefan Weinhuber if (sense) { 3300f3eb5384SStefan Weinhuber for (sl = 0; sl < 4; sl++) { 3301f3eb5384SStefan Weinhuber len += sprintf(page + len, 3302f3eb5384SStefan Weinhuber KERN_ERR PRINTK_HEADER 3303f3eb5384SStefan Weinhuber " Sense(hex) %2d-%2d:", 3304f3eb5384SStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 3305f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 3306f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 3307f3eb5384SStefan Weinhuber sense[8 * sl + sct]); 3308f3eb5384SStefan Weinhuber } 3309f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 3310f3eb5384SStefan Weinhuber } 3311f3eb5384SStefan Weinhuber 3312f3eb5384SStefan Weinhuber if (sense[27] & DASD_SENSE_BIT_0) { 3313f3eb5384SStefan Weinhuber /* 24 Byte Sense Data */ 3314f3eb5384SStefan Weinhuber sprintf(page + len, KERN_ERR PRINTK_HEADER 3315f3eb5384SStefan Weinhuber " 24 Byte: %x MSG %x, " 3316f3eb5384SStefan Weinhuber "%s MSGb to SYSOP\n", 3317f3eb5384SStefan Weinhuber sense[7] >> 4, sense[7] & 0x0f, 3318f3eb5384SStefan Weinhuber sense[1] & 0x10 ? "" : "no"); 3319f3eb5384SStefan Weinhuber } else { 3320f3eb5384SStefan Weinhuber /* 32 Byte Sense Data */ 3321f3eb5384SStefan Weinhuber sprintf(page + len, KERN_ERR PRINTK_HEADER 3322f3eb5384SStefan Weinhuber " 32 Byte: Format: %x " 3323f3eb5384SStefan Weinhuber "Exception class %x\n", 3324f3eb5384SStefan Weinhuber sense[6] & 0x0f, sense[22] >> 4); 3325f3eb5384SStefan Weinhuber } 3326f3eb5384SStefan Weinhuber } else { 3327f3eb5384SStefan Weinhuber sprintf(page + len, KERN_ERR PRINTK_HEADER 3328f3eb5384SStefan Weinhuber " SORRY - NO VALID SENSE AVAILABLE\n"); 3329f3eb5384SStefan Weinhuber } 3330f3eb5384SStefan Weinhuber } else { 3331f3eb5384SStefan Weinhuber sprintf(page + len, KERN_ERR PRINTK_HEADER 3332f3eb5384SStefan Weinhuber " SORRY - NO TSB DATA AVAILABLE\n"); 3333f3eb5384SStefan Weinhuber } 3334f3eb5384SStefan Weinhuber printk("%s", page); 3335f3eb5384SStefan Weinhuber free_page((unsigned long) page); 3336f3eb5384SStefan Weinhuber } 3337f3eb5384SStefan Weinhuber 3338f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense(struct dasd_device *device, 3339f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 3340f3eb5384SStefan Weinhuber { 3341a5a0061fSStefan Weinhuber if (scsw_is_tm(&irb->scsw)) 3342f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_tcw(device, req, irb); 3343f3eb5384SStefan Weinhuber else 3344f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_ccw(device, req, irb); 3345f3eb5384SStefan Weinhuber } 3346f3eb5384SStefan Weinhuber 3347501183f2SStefan Haberland static int dasd_eckd_pm_freeze(struct dasd_device *device) 3348d41dd122SStefan Haberland { 3349d41dd122SStefan Haberland /* 3350d41dd122SStefan Haberland * the device should be disconnected from our LCU structure 3351d41dd122SStefan Haberland * on restore we will reconnect it and reread LCU specific 3352d41dd122SStefan Haberland * information like PAV support that might have changed 3353d41dd122SStefan Haberland */ 3354d41dd122SStefan Haberland dasd_alias_remove_device(device); 3355d41dd122SStefan Haberland dasd_alias_disconnect_device_from_lcu(device); 3356d41dd122SStefan Haberland 3357d41dd122SStefan Haberland return 0; 3358d41dd122SStefan Haberland } 3359d41dd122SStefan Haberland 3360501183f2SStefan Haberland static int dasd_eckd_restore_device(struct dasd_device *device) 3361d41dd122SStefan Haberland { 3362d41dd122SStefan Haberland struct dasd_eckd_private *private; 33636fca97a9SStefan Haberland struct dasd_eckd_characteristics temp_rdc_data; 3364d41dd122SStefan Haberland int is_known, rc; 3365d41dd122SStefan Haberland struct dasd_uid temp_uid; 3366a7602f6cSStefan Haberland unsigned long flags; 3367d41dd122SStefan Haberland 3368d41dd122SStefan Haberland private = (struct dasd_eckd_private *) device->private; 3369d41dd122SStefan Haberland 3370d41dd122SStefan Haberland /* Read Configuration Data */ 3371d41dd122SStefan Haberland rc = dasd_eckd_read_conf(device); 3372d41dd122SStefan Haberland if (rc) 3373d41dd122SStefan Haberland goto out_err; 3374d41dd122SStefan Haberland 33752dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 33762dedf0d9SStefan Haberland /* Generate device unique id */ 33772dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 33782dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 3379d41dd122SStefan Haberland if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) 3380a7602f6cSStefan Haberland dev_err(&device->cdev->dev, "The UID of the DASD has " 3381a7602f6cSStefan Haberland "changed\n"); 33822dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 3383d41dd122SStefan Haberland if (rc) 3384d41dd122SStefan Haberland goto out_err; 3385d41dd122SStefan Haberland 3386d41dd122SStefan Haberland /* register lcu with alias handling, enable PAV if this is a new lcu */ 3387d41dd122SStefan Haberland is_known = dasd_alias_make_device_known_to_lcu(device); 3388d41dd122SStefan Haberland if (is_known < 0) 3389d41dd122SStefan Haberland return is_known; 3390d41dd122SStefan Haberland if (!is_known) { 3391f4ac1d02SStefan Weinhuber dasd_eckd_validate_server(device); 3392f4ac1d02SStefan Weinhuber dasd_alias_lcu_setup_complete(device); 3393f4ac1d02SStefan Weinhuber } else 3394f4ac1d02SStefan Weinhuber dasd_alias_wait_for_lcu_setup(device); 3395f4ac1d02SStefan Weinhuber 3396f4ac1d02SStefan Weinhuber /* RE-Read Configuration Data */ 3397f4ac1d02SStefan Weinhuber rc = dasd_eckd_read_conf(device); 3398d41dd122SStefan Haberland if (rc) 3399d41dd122SStefan Haberland goto out_err; 3400d41dd122SStefan Haberland 3401d41dd122SStefan Haberland /* Read Feature Codes */ 340268d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 3403d41dd122SStefan Haberland 3404d41dd122SStefan Haberland /* Read Device Characteristics */ 340568b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 34066fca97a9SStefan Haberland &temp_rdc_data, 64); 3407d41dd122SStefan Haberland if (rc) { 3408b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 3409b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 3410d41dd122SStefan Haberland goto out_err; 3411d41dd122SStefan Haberland } 3412a7602f6cSStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 34136fca97a9SStefan Haberland memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data)); 3414a7602f6cSStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 3415d41dd122SStefan Haberland 3416d41dd122SStefan Haberland /* add device to alias management */ 3417d41dd122SStefan Haberland dasd_alias_add_device(device); 3418d41dd122SStefan Haberland 3419d41dd122SStefan Haberland return 0; 3420d41dd122SStefan Haberland 3421d41dd122SStefan Haberland out_err: 3422e6125fbaSStefan Haberland return -1; 3423d41dd122SStefan Haberland } 3424d41dd122SStefan Haberland 3425501183f2SStefan Haberland static int dasd_eckd_reload_device(struct dasd_device *device) 3426501183f2SStefan Haberland { 3427501183f2SStefan Haberland struct dasd_eckd_private *private; 3428501183f2SStefan Haberland int rc, old_base; 34292dedf0d9SStefan Haberland char print_uid[60]; 34302dedf0d9SStefan Haberland struct dasd_uid uid; 34312dedf0d9SStefan Haberland unsigned long flags; 3432501183f2SStefan Haberland 3433501183f2SStefan Haberland private = (struct dasd_eckd_private *) device->private; 34342dedf0d9SStefan Haberland 34352dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 3436501183f2SStefan Haberland old_base = private->uid.base_unit_addr; 34372dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 34382dedf0d9SStefan Haberland 3439501183f2SStefan Haberland /* Read Configuration Data */ 3440501183f2SStefan Haberland rc = dasd_eckd_read_conf(device); 3441501183f2SStefan Haberland if (rc) 3442501183f2SStefan Haberland goto out_err; 3443501183f2SStefan Haberland 34442dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 3445501183f2SStefan Haberland if (rc) 3446501183f2SStefan Haberland goto out_err; 3447501183f2SStefan Haberland /* 3448501183f2SStefan Haberland * update unit address configuration and 3449501183f2SStefan Haberland * add device to alias management 3450501183f2SStefan Haberland */ 3451501183f2SStefan Haberland dasd_alias_update_add_device(device); 3452501183f2SStefan Haberland 34532dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &uid); 34542dedf0d9SStefan Haberland 34552dedf0d9SStefan Haberland if (old_base != uid.base_unit_addr) { 34562dedf0d9SStefan Haberland if (strlen(uid.vduit) > 0) 34572dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 34582dedf0d9SStefan Haberland "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial, 34592dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr, uid.vduit); 3460501183f2SStefan Haberland else 34612dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 34622dedf0d9SStefan Haberland "%s.%s.%04x.%02x", uid.vendor, uid.serial, 34632dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr); 3464501183f2SStefan Haberland 3465501183f2SStefan Haberland dev_info(&device->cdev->dev, 3466501183f2SStefan Haberland "An Alias device was reassigned to a new base device " 34672dedf0d9SStefan Haberland "with UID: %s\n", print_uid); 3468501183f2SStefan Haberland } 3469501183f2SStefan Haberland return 0; 3470501183f2SStefan Haberland 3471501183f2SStefan Haberland out_err: 3472501183f2SStefan Haberland return -1; 3473501183f2SStefan Haberland } 3474501183f2SStefan Haberland 3475d41dd122SStefan Haberland static struct ccw_driver dasd_eckd_driver = { 3476d41dd122SStefan Haberland .name = "dasd-eckd", 3477d41dd122SStefan Haberland .owner = THIS_MODULE, 3478d41dd122SStefan Haberland .ids = dasd_eckd_ids, 3479d41dd122SStefan Haberland .probe = dasd_eckd_probe, 3480d41dd122SStefan Haberland .remove = dasd_generic_remove, 3481d41dd122SStefan Haberland .set_offline = dasd_generic_set_offline, 3482d41dd122SStefan Haberland .set_online = dasd_eckd_set_online, 3483d41dd122SStefan Haberland .notify = dasd_generic_notify, 3484d41dd122SStefan Haberland .freeze = dasd_generic_pm_freeze, 3485d41dd122SStefan Haberland .thaw = dasd_generic_restore_device, 3486d41dd122SStefan Haberland .restore = dasd_generic_restore_device, 3487a23ed009SStefan Haberland .uc_handler = dasd_generic_uc_handler, 3488d41dd122SStefan Haberland }; 3489f3eb5384SStefan Weinhuber 34901da177e4SLinus Torvalds /* 34911da177e4SLinus Torvalds * max_blocks is dependent on the amount of storage that is available 34921da177e4SLinus Torvalds * in the static io buffer for each device. Currently each device has 34931da177e4SLinus Torvalds * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has 34941da177e4SLinus Torvalds * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use 34951da177e4SLinus Torvalds * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In 34961da177e4SLinus Torvalds * addition we have one define extent ccw + 16 bytes of data and one 34971da177e4SLinus Torvalds * locate record ccw + 16 bytes of data. That makes: 34981da177e4SLinus Torvalds * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. 34991da177e4SLinus Torvalds * We want to fit two into the available memory so that we can immediately 35001da177e4SLinus Torvalds * start the next request if one finishes off. That makes 249.5 blocks 35011da177e4SLinus Torvalds * for one request. Give a little safety and the result is 240. 35021da177e4SLinus Torvalds */ 35031da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline = { 35041da177e4SLinus Torvalds .owner = THIS_MODULE, 35051da177e4SLinus Torvalds .name = "ECKD", 35061da177e4SLinus Torvalds .ebcname = "ECKD", 35071da177e4SLinus Torvalds .max_blocks = 240, 35081da177e4SLinus Torvalds .check_device = dasd_eckd_check_characteristics, 35098e09f215SStefan Weinhuber .uncheck_device = dasd_eckd_uncheck_device, 35101da177e4SLinus Torvalds .do_analysis = dasd_eckd_do_analysis, 35118e09f215SStefan Weinhuber .ready_to_online = dasd_eckd_ready_to_online, 35128e09f215SStefan Weinhuber .online_to_ready = dasd_eckd_online_to_ready, 35131da177e4SLinus Torvalds .fill_geometry = dasd_eckd_fill_geometry, 35141da177e4SLinus Torvalds .start_IO = dasd_start_IO, 35151da177e4SLinus Torvalds .term_IO = dasd_term_IO, 35168e09f215SStefan Weinhuber .handle_terminated_request = dasd_eckd_handle_terminated_request, 35171da177e4SLinus Torvalds .format_device = dasd_eckd_format_device, 35181da177e4SLinus Torvalds .erp_action = dasd_eckd_erp_action, 35191da177e4SLinus Torvalds .erp_postaction = dasd_eckd_erp_postaction, 35208e09f215SStefan Weinhuber .handle_unsolicited_interrupt = dasd_eckd_handle_unsolicited_interrupt, 35218e09f215SStefan Weinhuber .build_cp = dasd_eckd_build_alias_cp, 35228e09f215SStefan Weinhuber .free_cp = dasd_eckd_free_alias_cp, 35231da177e4SLinus Torvalds .dump_sense = dasd_eckd_dump_sense, 3524fc19f381SStefan Haberland .dump_sense_dbf = dasd_eckd_dump_sense_dbf, 35251da177e4SLinus Torvalds .fill_info = dasd_eckd_fill_info, 35261107ccfbSChristoph Hellwig .ioctl = dasd_eckd_ioctl, 3527d41dd122SStefan Haberland .freeze = dasd_eckd_pm_freeze, 3528d41dd122SStefan Haberland .restore = dasd_eckd_restore_device, 3529501183f2SStefan Haberland .reload = dasd_eckd_reload_device, 35302dedf0d9SStefan Haberland .get_uid = dasd_eckd_get_uid, 35311da177e4SLinus Torvalds }; 35321da177e4SLinus Torvalds 35331da177e4SLinus Torvalds static int __init 35341da177e4SLinus Torvalds dasd_eckd_init(void) 35351da177e4SLinus Torvalds { 3536736e6ea0SSebastian Ott int ret; 3537736e6ea0SSebastian Ott 35381da177e4SLinus Torvalds ASCEBC(dasd_eckd_discipline.ebcname, 4); 3539f932bceaSStefan Weinhuber dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), 3540f932bceaSStefan Weinhuber GFP_KERNEL | GFP_DMA); 3541f932bceaSStefan Weinhuber if (!dasd_reserve_req) 3542f932bceaSStefan Weinhuber return -ENOMEM; 3543736e6ea0SSebastian Ott ret = ccw_driver_register(&dasd_eckd_driver); 3544736e6ea0SSebastian Ott if (!ret) 3545736e6ea0SSebastian Ott wait_for_device_probe(); 3546f932bceaSStefan Weinhuber else 3547f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 3548736e6ea0SSebastian Ott return ret; 35491da177e4SLinus Torvalds } 35501da177e4SLinus Torvalds 35511da177e4SLinus Torvalds static void __exit 35521da177e4SLinus Torvalds dasd_eckd_cleanup(void) 35531da177e4SLinus Torvalds { 35541da177e4SLinus Torvalds ccw_driver_unregister(&dasd_eckd_driver); 3555f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 35561da177e4SLinus Torvalds } 35571da177e4SLinus Torvalds 35581da177e4SLinus Torvalds module_init(dasd_eckd_init); 35591da177e4SLinus Torvalds module_exit(dasd_eckd_cleanup); 3560