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 93a4d26c6aSStefan Weinhuber /* definitions for the path verification worker */ 94a4d26c6aSStefan Weinhuber struct path_verification_work_data { 95a4d26c6aSStefan Weinhuber struct work_struct worker; 96a4d26c6aSStefan Weinhuber struct dasd_device *device; 97a4d26c6aSStefan Weinhuber struct dasd_ccw_req cqr; 98a4d26c6aSStefan Weinhuber struct ccw1 ccw; 99a4d26c6aSStefan Weinhuber __u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE]; 100a4d26c6aSStefan Weinhuber int isglobal; 101a4d26c6aSStefan Weinhuber __u8 tbvpm; 102a4d26c6aSStefan Weinhuber }; 103a4d26c6aSStefan Weinhuber static struct path_verification_work_data *path_verification_worker; 104a4d26c6aSStefan Weinhuber static DEFINE_MUTEX(dasd_path_verification_mutex); 105eb6e199bSStefan Weinhuber 1061da177e4SLinus Torvalds /* initial attempt at a probe function. this can be simplified once 1071da177e4SLinus Torvalds * the other detection code is gone */ 1081da177e4SLinus Torvalds static int 1091da177e4SLinus Torvalds dasd_eckd_probe (struct ccw_device *cdev) 1101da177e4SLinus Torvalds { 1111da177e4SLinus Torvalds int ret; 1121da177e4SLinus Torvalds 11340545573SHorst Hummel /* set ECKD specific ccw-device options */ 114454e1fa1SPeter Oberparleiter ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE | 115454e1fa1SPeter Oberparleiter CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH); 11640545573SHorst Hummel if (ret) { 117b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s", 118b8ed5dd5SStefan Haberland "dasd_eckd_probe: could not set " 119b8ed5dd5SStefan Haberland "ccw-device options"); 1201da177e4SLinus Torvalds return ret; 12140545573SHorst Hummel } 12240545573SHorst Hummel ret = dasd_generic_probe(cdev, &dasd_eckd_discipline); 12340545573SHorst Hummel return ret; 1241da177e4SLinus Torvalds } 1251da177e4SLinus Torvalds 1261da177e4SLinus Torvalds static int 1271da177e4SLinus Torvalds dasd_eckd_set_online(struct ccw_device *cdev) 1281da177e4SLinus Torvalds { 1291da177e4SLinus Torvalds return dasd_generic_set_online(cdev, &dasd_eckd_discipline); 1301da177e4SLinus Torvalds } 1311da177e4SLinus Torvalds 1321da177e4SLinus Torvalds static const int sizes_trk0[] = { 28, 148, 84 }; 1331da177e4SLinus Torvalds #define LABEL_SIZE 140 1341da177e4SLinus Torvalds 1351da177e4SLinus Torvalds static inline unsigned int 1361da177e4SLinus Torvalds round_up_multiple(unsigned int no, unsigned int mult) 1371da177e4SLinus Torvalds { 1381da177e4SLinus Torvalds int rem = no % mult; 1391da177e4SLinus Torvalds return (rem ? no - rem + mult : no); 1401da177e4SLinus Torvalds } 1411da177e4SLinus Torvalds 1421da177e4SLinus Torvalds static inline unsigned int 1431da177e4SLinus Torvalds ceil_quot(unsigned int d1, unsigned int d2) 1441da177e4SLinus Torvalds { 1451da177e4SLinus Torvalds return (d1 + (d2 - 1)) / d2; 1461da177e4SLinus Torvalds } 1471da177e4SLinus Torvalds 1484d284cacSHeiko Carstens static unsigned int 1491da177e4SLinus Torvalds recs_per_track(struct dasd_eckd_characteristics * rdc, 1501da177e4SLinus Torvalds unsigned int kl, unsigned int dl) 1511da177e4SLinus Torvalds { 1521da177e4SLinus Torvalds int dn, kn; 1531da177e4SLinus Torvalds 1541da177e4SLinus Torvalds switch (rdc->dev_type) { 1551da177e4SLinus Torvalds case 0x3380: 1561da177e4SLinus Torvalds if (kl) 1571da177e4SLinus Torvalds return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + 1581da177e4SLinus Torvalds ceil_quot(dl + 12, 32)); 1591da177e4SLinus Torvalds else 1601da177e4SLinus Torvalds return 1499 / (15 + ceil_quot(dl + 12, 32)); 1611da177e4SLinus Torvalds case 0x3390: 1621da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1631da177e4SLinus Torvalds if (kl) { 1641da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1651da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + 1661da177e4SLinus Torvalds 9 + ceil_quot(dl + 6 * dn, 34)); 1671da177e4SLinus Torvalds } else 1681da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); 1691da177e4SLinus Torvalds case 0x9345: 1701da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1711da177e4SLinus Torvalds if (kl) { 1721da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1731da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + 1741da177e4SLinus Torvalds ceil_quot(dl + 6 * dn, 34)); 1751da177e4SLinus Torvalds } else 1761da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); 1771da177e4SLinus Torvalds } 1781da177e4SLinus Torvalds return 0; 1791da177e4SLinus Torvalds } 1801da177e4SLinus Torvalds 181b44b0ab3SStefan Weinhuber static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head) 182b44b0ab3SStefan Weinhuber { 183b44b0ab3SStefan Weinhuber geo->cyl = (__u16) cyl; 184b44b0ab3SStefan Weinhuber geo->head = cyl >> 16; 185b44b0ab3SStefan Weinhuber geo->head <<= 4; 186b44b0ab3SStefan Weinhuber geo->head |= head; 187b44b0ab3SStefan Weinhuber } 188b44b0ab3SStefan Weinhuber 1894d284cacSHeiko Carstens static int 1901da177e4SLinus Torvalds check_XRC (struct ccw1 *de_ccw, 1911da177e4SLinus Torvalds struct DE_eckd_data *data, 1921da177e4SLinus Torvalds struct dasd_device *device) 1931da177e4SLinus Torvalds { 1941da177e4SLinus Torvalds struct dasd_eckd_private *private; 195d54853efSMartin Schwidefsky int rc; 1961da177e4SLinus Torvalds 1971da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 198d54853efSMartin Schwidefsky if (!private->rdc_data.facilities.XRC_supported) 199d54853efSMartin Schwidefsky return 0; 2001da177e4SLinus Torvalds 2011da177e4SLinus Torvalds /* switch on System Time Stamp - needed for XRC Support */ 2021da177e4SLinus Torvalds data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ 2031da177e4SLinus Torvalds data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ 2041da177e4SLinus Torvalds 205d54853efSMartin Schwidefsky rc = get_sync_clock(&data->ep_sys_time); 206d54853efSMartin Schwidefsky /* Ignore return code if sync clock is switched off. */ 207d54853efSMartin Schwidefsky if (rc == -ENOSYS || rc == -EACCES) 208d54853efSMartin Schwidefsky rc = 0; 2091da177e4SLinus Torvalds 2101da177e4SLinus Torvalds de_ccw->count = sizeof(struct DE_eckd_data); 2111da177e4SLinus Torvalds de_ccw->flags |= CCW_FLAG_SLI; 212d54853efSMartin Schwidefsky return rc; 2131da177e4SLinus Torvalds } 2141da177e4SLinus Torvalds 2154d284cacSHeiko Carstens static int 216b44b0ab3SStefan Weinhuber define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk, 217b44b0ab3SStefan Weinhuber unsigned int totrk, int cmd, struct dasd_device *device) 2181da177e4SLinus Torvalds { 2191da177e4SLinus Torvalds struct dasd_eckd_private *private; 220b44b0ab3SStefan Weinhuber u32 begcyl, endcyl; 221b44b0ab3SStefan Weinhuber u16 heads, beghead, endhead; 222d54853efSMartin Schwidefsky int rc = 0; 2231da177e4SLinus Torvalds 2241da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 2251da177e4SLinus Torvalds 2261da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; 2271da177e4SLinus Torvalds ccw->flags = 0; 2281da177e4SLinus Torvalds ccw->count = 16; 2291da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 2301da177e4SLinus Torvalds 2311da177e4SLinus Torvalds memset(data, 0, sizeof(struct DE_eckd_data)); 2321da177e4SLinus Torvalds switch (cmd) { 2331da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 2341da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 2351da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 2361da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 2371da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 2381da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 2391da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 2401da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 2411da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_COUNT: 2421da177e4SLinus Torvalds data->mask.perm = 0x1; 2431da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 2441da177e4SLinus Torvalds break; 2451da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 2461da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 2471da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 2481da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 2491da177e4SLinus Torvalds data->mask.perm = 0x02; 2501da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 251d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2521da177e4SLinus Torvalds break; 2531da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 2541da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 2551da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 256d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2571da177e4SLinus Torvalds break; 2581da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 2591da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 2601da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 2611da177e4SLinus Torvalds data->mask.perm = 0x3; 2621da177e4SLinus Torvalds data->mask.auth = 0x1; 2631da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 264d54853efSMartin Schwidefsky rc = check_XRC (ccw, data, device); 2651da177e4SLinus Torvalds break; 2661da177e4SLinus Torvalds default: 267fc19f381SStefan Haberland dev_err(&device->cdev->dev, 268fc19f381SStefan Haberland "0x%x is not a known command\n", cmd); 2691da177e4SLinus Torvalds break; 2701da177e4SLinus Torvalds } 2711da177e4SLinus Torvalds 2721da177e4SLinus Torvalds data->attributes.mode = 0x3; /* ECKD */ 2731da177e4SLinus Torvalds 2741da177e4SLinus Torvalds if ((private->rdc_data.cu_type == 0x2105 || 2751da177e4SLinus Torvalds private->rdc_data.cu_type == 0x2107 || 2761da177e4SLinus Torvalds private->rdc_data.cu_type == 0x1750) 2771da177e4SLinus Torvalds && !(private->uses_cdl && trk < 2)) 2781da177e4SLinus Torvalds data->ga_extended |= 0x40; /* Regular Data Format Mode */ 2791da177e4SLinus Torvalds 280b44b0ab3SStefan Weinhuber heads = private->rdc_data.trk_per_cyl; 281b44b0ab3SStefan Weinhuber begcyl = trk / heads; 282b44b0ab3SStefan Weinhuber beghead = trk % heads; 283b44b0ab3SStefan Weinhuber endcyl = totrk / heads; 284b44b0ab3SStefan Weinhuber endhead = totrk % heads; 2851da177e4SLinus Torvalds 2861da177e4SLinus Torvalds /* check for sequential prestage - enhance cylinder range */ 2871da177e4SLinus Torvalds if (data->attributes.operation == DASD_SEQ_PRESTAGE || 2881da177e4SLinus Torvalds data->attributes.operation == DASD_SEQ_ACCESS) { 2891da177e4SLinus Torvalds 290b44b0ab3SStefan Weinhuber if (endcyl + private->attrib.nr_cyl < private->real_cyl) 291b44b0ab3SStefan Weinhuber endcyl += private->attrib.nr_cyl; 2921da177e4SLinus Torvalds else 293b44b0ab3SStefan Weinhuber endcyl = (private->real_cyl - 1); 2941da177e4SLinus Torvalds } 2951da177e4SLinus Torvalds 296b44b0ab3SStefan Weinhuber set_ch_t(&data->beg_ext, begcyl, beghead); 297b44b0ab3SStefan Weinhuber set_ch_t(&data->end_ext, endcyl, endhead); 298d54853efSMartin Schwidefsky return rc; 2991da177e4SLinus Torvalds } 3001da177e4SLinus Torvalds 3018e09f215SStefan Weinhuber static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata, 3028e09f215SStefan Weinhuber struct dasd_device *device) 3038e09f215SStefan Weinhuber { 3048e09f215SStefan Weinhuber struct dasd_eckd_private *private; 3058e09f215SStefan Weinhuber int rc; 3068e09f215SStefan Weinhuber 3078e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 3088e09f215SStefan Weinhuber if (!private->rdc_data.facilities.XRC_supported) 3098e09f215SStefan Weinhuber return 0; 3108e09f215SStefan Weinhuber 3118e09f215SStefan Weinhuber /* switch on System Time Stamp - needed for XRC Support */ 312f3eb5384SStefan Weinhuber pfxdata->define_extent.ga_extended |= 0x08; /* 'Time Stamp Valid' */ 313f3eb5384SStefan Weinhuber pfxdata->define_extent.ga_extended |= 0x02; /* 'Extended Parameter' */ 3148e09f215SStefan Weinhuber pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */ 3158e09f215SStefan Weinhuber 316f3eb5384SStefan Weinhuber rc = get_sync_clock(&pfxdata->define_extent.ep_sys_time); 3178e09f215SStefan Weinhuber /* Ignore return code if sync clock is switched off. */ 3188e09f215SStefan Weinhuber if (rc == -ENOSYS || rc == -EACCES) 3198e09f215SStefan Weinhuber rc = 0; 3208e09f215SStefan Weinhuber return rc; 3218e09f215SStefan Weinhuber } 3228e09f215SStefan Weinhuber 323f3eb5384SStefan Weinhuber static void fill_LRE_data(struct LRE_eckd_data *data, unsigned int trk, 324f3eb5384SStefan Weinhuber unsigned int rec_on_trk, int count, int cmd, 325f3eb5384SStefan Weinhuber struct dasd_device *device, unsigned int reclen, 326f3eb5384SStefan Weinhuber unsigned int tlf) 327f3eb5384SStefan Weinhuber { 328f3eb5384SStefan Weinhuber struct dasd_eckd_private *private; 329f3eb5384SStefan Weinhuber int sector; 330f3eb5384SStefan Weinhuber int dn, d; 331f3eb5384SStefan Weinhuber 332f3eb5384SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 333f3eb5384SStefan Weinhuber 334f3eb5384SStefan Weinhuber memset(data, 0, sizeof(*data)); 335f3eb5384SStefan Weinhuber sector = 0; 336f3eb5384SStefan Weinhuber if (rec_on_trk) { 337f3eb5384SStefan Weinhuber switch (private->rdc_data.dev_type) { 338f3eb5384SStefan Weinhuber case 0x3390: 339f3eb5384SStefan Weinhuber dn = ceil_quot(reclen + 6, 232); 340f3eb5384SStefan Weinhuber d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 341f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 342f3eb5384SStefan Weinhuber break; 343f3eb5384SStefan Weinhuber case 0x3380: 344f3eb5384SStefan Weinhuber d = 7 + ceil_quot(reclen + 12, 32); 345f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 346f3eb5384SStefan Weinhuber break; 347f3eb5384SStefan Weinhuber } 348f3eb5384SStefan Weinhuber } 349f3eb5384SStefan Weinhuber data->sector = sector; 350f3eb5384SStefan Weinhuber /* note: meaning of count depends on the operation 351f3eb5384SStefan Weinhuber * for record based I/O it's the number of records, but for 352f3eb5384SStefan Weinhuber * track based I/O it's the number of tracks 353f3eb5384SStefan Weinhuber */ 354f3eb5384SStefan Weinhuber data->count = count; 355f3eb5384SStefan Weinhuber switch (cmd) { 356f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 357f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 358f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 359f3eb5384SStefan Weinhuber break; 360f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_HOME_ADDRESS: 361f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 362f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 363f3eb5384SStefan Weinhuber break; 364f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 365f3eb5384SStefan Weinhuber data->operation.orientation = 0x1; 366f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 367f3eb5384SStefan Weinhuber data->count++; 368f3eb5384SStefan Weinhuber break; 369f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_RECORD_ZERO: 370f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 371f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 372f3eb5384SStefan Weinhuber data->count++; 373f3eb5384SStefan Weinhuber break; 374f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE: 375f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_MT: 376f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD: 377f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD_MT: 378f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 379f3eb5384SStefan Weinhuber data->length = reclen; 380f3eb5384SStefan Weinhuber data->operation.operation = 0x01; 381f3eb5384SStefan Weinhuber break; 382f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD: 383f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD_MT: 384f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 385f3eb5384SStefan Weinhuber data->length = reclen; 386f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 387f3eb5384SStefan Weinhuber break; 388f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 389f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 390f3eb5384SStefan Weinhuber data->length = reclen; /* not tlf, as one might think */ 391f3eb5384SStefan Weinhuber data->operation.operation = 0x3F; 392f3eb5384SStefan Weinhuber data->extended_operation = 0x23; 393f3eb5384SStefan Weinhuber break; 394f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ: 395f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_MT: 396f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_KD: 397f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_KD_MT: 398f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 399f3eb5384SStefan Weinhuber data->length = reclen; 400f3eb5384SStefan Weinhuber data->operation.operation = 0x06; 401f3eb5384SStefan Weinhuber break; 402f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD: 403f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD_MT: 404f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 405f3eb5384SStefan Weinhuber data->length = reclen; 406f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 407f3eb5384SStefan Weinhuber break; 408f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_COUNT: 409f3eb5384SStefan Weinhuber data->operation.operation = 0x06; 410f3eb5384SStefan Weinhuber break; 411f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 412f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 413f3eb5384SStefan Weinhuber data->length = tlf; 414f3eb5384SStefan Weinhuber data->operation.operation = 0x0C; 415f3eb5384SStefan Weinhuber break; 416f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_ERASE: 417f3eb5384SStefan Weinhuber data->length = reclen; 418f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 419f3eb5384SStefan Weinhuber data->operation.operation = 0x0b; 420f3eb5384SStefan Weinhuber break; 421f3eb5384SStefan Weinhuber default: 422f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, device, 423f3eb5384SStefan Weinhuber "fill LRE unknown opcode 0x%x", cmd); 424f3eb5384SStefan Weinhuber BUG(); 425f3eb5384SStefan Weinhuber } 426f3eb5384SStefan Weinhuber set_ch_t(&data->seek_addr, 427f3eb5384SStefan Weinhuber trk / private->rdc_data.trk_per_cyl, 428f3eb5384SStefan Weinhuber trk % private->rdc_data.trk_per_cyl); 429f3eb5384SStefan Weinhuber data->search_arg.cyl = data->seek_addr.cyl; 430f3eb5384SStefan Weinhuber data->search_arg.head = data->seek_addr.head; 431f3eb5384SStefan Weinhuber data->search_arg.record = rec_on_trk; 432f3eb5384SStefan Weinhuber } 433f3eb5384SStefan Weinhuber 434f3eb5384SStefan Weinhuber static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 435b44b0ab3SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 436f3eb5384SStefan Weinhuber struct dasd_device *basedev, struct dasd_device *startdev, 437f3eb5384SStefan Weinhuber unsigned char format, unsigned int rec_on_trk, int count, 438f3eb5384SStefan Weinhuber unsigned int blksize, unsigned int tlf) 4398e09f215SStefan Weinhuber { 4408e09f215SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 441f3eb5384SStefan Weinhuber struct DE_eckd_data *dedata; 442f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 443b44b0ab3SStefan Weinhuber u32 begcyl, endcyl; 444b44b0ab3SStefan Weinhuber u16 heads, beghead, endhead; 4458e09f215SStefan Weinhuber int rc = 0; 4468e09f215SStefan Weinhuber 4478e09f215SStefan Weinhuber basepriv = (struct dasd_eckd_private *) basedev->private; 4488e09f215SStefan Weinhuber startpriv = (struct dasd_eckd_private *) startdev->private; 449f3eb5384SStefan Weinhuber dedata = &pfxdata->define_extent; 450f3eb5384SStefan Weinhuber lredata = &pfxdata->locate_record; 4518e09f215SStefan Weinhuber 4528e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PFX; 4538e09f215SStefan Weinhuber ccw->flags = 0; 4548e09f215SStefan Weinhuber ccw->count = sizeof(*pfxdata); 4558e09f215SStefan Weinhuber ccw->cda = (__u32) __pa(pfxdata); 4568e09f215SStefan Weinhuber 4578e09f215SStefan Weinhuber memset(pfxdata, 0, sizeof(*pfxdata)); 4588e09f215SStefan Weinhuber /* prefix data */ 459f3eb5384SStefan Weinhuber if (format > 1) { 460f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 461f3eb5384SStefan Weinhuber "PFX LRE unknown format 0x%x", format); 462f3eb5384SStefan Weinhuber BUG(); 463f3eb5384SStefan Weinhuber return -EINVAL; 464f3eb5384SStefan Weinhuber } 465f3eb5384SStefan Weinhuber pfxdata->format = format; 4664abb08c2SStefan Weinhuber pfxdata->base_address = basepriv->ned->unit_addr; 4674abb08c2SStefan Weinhuber pfxdata->base_lss = basepriv->ned->ID; 468f3eb5384SStefan Weinhuber pfxdata->validity.define_extent = 1; 4698e09f215SStefan Weinhuber 4708e09f215SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 4718e09f215SStefan Weinhuber if (startpriv->uid.type != UA_BASE_DEVICE) { 4728e09f215SStefan Weinhuber pfxdata->validity.verify_base = 1; 4738e09f215SStefan Weinhuber if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 4748e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 1; 4758e09f215SStefan Weinhuber } 4768e09f215SStefan Weinhuber 4778e09f215SStefan Weinhuber /* define extend data (mostly)*/ 4788e09f215SStefan Weinhuber switch (cmd) { 4798e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_HOME_ADDRESS: 4808e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_RECORD_ZERO: 4818e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ: 4828e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_MT: 4838e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD: 4848e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD_MT: 4858e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_KD: 4868e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_KD_MT: 4878e09f215SStefan Weinhuber case DASD_ECKD_CCW_READ_COUNT: 488f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 489f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 490f3eb5384SStefan Weinhuber break; 491f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 492f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 493f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 494f3eb5384SStefan Weinhuber dedata->blk_size = 0; 4958e09f215SStefan Weinhuber break; 4968e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE: 4978e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_MT: 4988e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD: 4998e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD_MT: 500f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 501f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 5028e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 5038e09f215SStefan Weinhuber break; 5048e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD: 5058e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD_MT: 506f3eb5384SStefan Weinhuber dedata->attributes.operation = DASD_BYPASS_CACHE; 5078e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 5088e09f215SStefan Weinhuber break; 5098e09f215SStefan Weinhuber case DASD_ECKD_CCW_ERASE: 5108e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 5118e09f215SStefan Weinhuber case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 512f3eb5384SStefan Weinhuber dedata->mask.perm = 0x3; 513f3eb5384SStefan Weinhuber dedata->mask.auth = 0x1; 514f3eb5384SStefan Weinhuber dedata->attributes.operation = DASD_BYPASS_CACHE; 515f3eb5384SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 516f3eb5384SStefan Weinhuber break; 517f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 518f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 519f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 520f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 5218e09f215SStefan Weinhuber rc = check_XRC_on_prefix(pfxdata, basedev); 5228e09f215SStefan Weinhuber break; 5238e09f215SStefan Weinhuber default: 524f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 525f3eb5384SStefan Weinhuber "PFX LRE unknown opcode 0x%x", cmd); 526f3eb5384SStefan Weinhuber BUG(); 527f3eb5384SStefan Weinhuber return -EINVAL; 5288e09f215SStefan Weinhuber } 5298e09f215SStefan Weinhuber 530f3eb5384SStefan Weinhuber dedata->attributes.mode = 0x3; /* ECKD */ 5318e09f215SStefan Weinhuber 5328e09f215SStefan Weinhuber if ((basepriv->rdc_data.cu_type == 0x2105 || 5338e09f215SStefan Weinhuber basepriv->rdc_data.cu_type == 0x2107 || 5348e09f215SStefan Weinhuber basepriv->rdc_data.cu_type == 0x1750) 5358e09f215SStefan Weinhuber && !(basepriv->uses_cdl && trk < 2)) 536f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x40; /* Regular Data Format Mode */ 5378e09f215SStefan Weinhuber 538b44b0ab3SStefan Weinhuber heads = basepriv->rdc_data.trk_per_cyl; 539b44b0ab3SStefan Weinhuber begcyl = trk / heads; 540b44b0ab3SStefan Weinhuber beghead = trk % heads; 541b44b0ab3SStefan Weinhuber endcyl = totrk / heads; 542b44b0ab3SStefan Weinhuber endhead = totrk % heads; 5438e09f215SStefan Weinhuber 5448e09f215SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 545f3eb5384SStefan Weinhuber if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 546f3eb5384SStefan Weinhuber dedata->attributes.operation == DASD_SEQ_ACCESS) { 5478e09f215SStefan Weinhuber 548b44b0ab3SStefan Weinhuber if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 549b44b0ab3SStefan Weinhuber endcyl += basepriv->attrib.nr_cyl; 5508e09f215SStefan Weinhuber else 551b44b0ab3SStefan Weinhuber endcyl = (basepriv->real_cyl - 1); 5528e09f215SStefan Weinhuber } 5538e09f215SStefan Weinhuber 554f3eb5384SStefan Weinhuber set_ch_t(&dedata->beg_ext, begcyl, beghead); 555f3eb5384SStefan Weinhuber set_ch_t(&dedata->end_ext, endcyl, endhead); 556f3eb5384SStefan Weinhuber 557f3eb5384SStefan Weinhuber if (format == 1) { 558f3eb5384SStefan Weinhuber fill_LRE_data(lredata, trk, rec_on_trk, count, cmd, 559f3eb5384SStefan Weinhuber basedev, blksize, tlf); 560f3eb5384SStefan Weinhuber } 561f3eb5384SStefan Weinhuber 5628e09f215SStefan Weinhuber return rc; 5638e09f215SStefan Weinhuber } 5648e09f215SStefan Weinhuber 565f3eb5384SStefan Weinhuber static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 566f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 567f3eb5384SStefan Weinhuber struct dasd_device *basedev, struct dasd_device *startdev) 568f3eb5384SStefan Weinhuber { 569f3eb5384SStefan Weinhuber return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev, 570f3eb5384SStefan Weinhuber 0, 0, 0, 0, 0); 571f3eb5384SStefan Weinhuber } 572f3eb5384SStefan Weinhuber 5734d284cacSHeiko Carstens static void 574b44b0ab3SStefan Weinhuber locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk, 575b44b0ab3SStefan Weinhuber unsigned int rec_on_trk, int no_rec, int cmd, 5761da177e4SLinus Torvalds struct dasd_device * device, int reclen) 5771da177e4SLinus Torvalds { 5781da177e4SLinus Torvalds struct dasd_eckd_private *private; 5791da177e4SLinus Torvalds int sector; 5801da177e4SLinus Torvalds int dn, d; 5811da177e4SLinus Torvalds 5821da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 5831da177e4SLinus Torvalds 5841da177e4SLinus Torvalds DBF_DEV_EVENT(DBF_INFO, device, 5851da177e4SLinus Torvalds "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", 5861da177e4SLinus Torvalds trk, rec_on_trk, no_rec, cmd, reclen); 5871da177e4SLinus Torvalds 5881da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; 5891da177e4SLinus Torvalds ccw->flags = 0; 5901da177e4SLinus Torvalds ccw->count = 16; 5911da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 5921da177e4SLinus Torvalds 5931da177e4SLinus Torvalds memset(data, 0, sizeof(struct LO_eckd_data)); 5941da177e4SLinus Torvalds sector = 0; 5951da177e4SLinus Torvalds if (rec_on_trk) { 5961da177e4SLinus Torvalds switch (private->rdc_data.dev_type) { 5971da177e4SLinus Torvalds case 0x3390: 5981da177e4SLinus Torvalds dn = ceil_quot(reclen + 6, 232); 5991da177e4SLinus Torvalds d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 6001da177e4SLinus Torvalds sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 6011da177e4SLinus Torvalds break; 6021da177e4SLinus Torvalds case 0x3380: 6031da177e4SLinus Torvalds d = 7 + ceil_quot(reclen + 12, 32); 6041da177e4SLinus Torvalds sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 6051da177e4SLinus Torvalds break; 6061da177e4SLinus Torvalds } 6071da177e4SLinus Torvalds } 6081da177e4SLinus Torvalds data->sector = sector; 6091da177e4SLinus Torvalds data->count = no_rec; 6101da177e4SLinus Torvalds switch (cmd) { 6111da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 6121da177e4SLinus Torvalds data->operation.orientation = 0x3; 6131da177e4SLinus Torvalds data->operation.operation = 0x03; 6141da177e4SLinus Torvalds break; 6151da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 6161da177e4SLinus Torvalds data->operation.orientation = 0x3; 6171da177e4SLinus Torvalds data->operation.operation = 0x16; 6181da177e4SLinus Torvalds break; 6191da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 6201da177e4SLinus Torvalds data->operation.orientation = 0x1; 6211da177e4SLinus Torvalds data->operation.operation = 0x03; 6221da177e4SLinus Torvalds data->count++; 6231da177e4SLinus Torvalds break; 6241da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 6251da177e4SLinus Torvalds data->operation.orientation = 0x3; 6261da177e4SLinus Torvalds data->operation.operation = 0x16; 6271da177e4SLinus Torvalds data->count++; 6281da177e4SLinus Torvalds break; 6291da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 6301da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 6311da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 6321da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 6331da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6341da177e4SLinus Torvalds data->length = reclen; 6351da177e4SLinus Torvalds data->operation.operation = 0x01; 6361da177e4SLinus Torvalds break; 6371da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 6381da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 6391da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6401da177e4SLinus Torvalds data->length = reclen; 6411da177e4SLinus Torvalds data->operation.operation = 0x03; 6421da177e4SLinus Torvalds break; 6431da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 6441da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 6451da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 6461da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 6471da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6481da177e4SLinus Torvalds data->length = reclen; 6491da177e4SLinus Torvalds data->operation.operation = 0x06; 6501da177e4SLinus Torvalds break; 6511da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 6521da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 6531da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6541da177e4SLinus Torvalds data->length = reclen; 6551da177e4SLinus Torvalds data->operation.operation = 0x16; 6561da177e4SLinus Torvalds break; 6571da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_COUNT: 6581da177e4SLinus Torvalds data->operation.operation = 0x06; 6591da177e4SLinus Torvalds break; 6601da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 6611da177e4SLinus Torvalds data->length = reclen; 6621da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6631da177e4SLinus Torvalds data->operation.operation = 0x0b; 6641da177e4SLinus Torvalds break; 6651da177e4SLinus Torvalds default: 666fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record " 667fc19f381SStefan Haberland "opcode 0x%x", cmd); 6681da177e4SLinus Torvalds } 669b44b0ab3SStefan Weinhuber set_ch_t(&data->seek_addr, 670b44b0ab3SStefan Weinhuber trk / private->rdc_data.trk_per_cyl, 671b44b0ab3SStefan Weinhuber trk % private->rdc_data.trk_per_cyl); 672b44b0ab3SStefan Weinhuber data->search_arg.cyl = data->seek_addr.cyl; 673b44b0ab3SStefan Weinhuber data->search_arg.head = data->seek_addr.head; 6741da177e4SLinus Torvalds data->search_arg.record = rec_on_trk; 6751da177e4SLinus Torvalds } 6761da177e4SLinus Torvalds 6771da177e4SLinus Torvalds /* 6781da177e4SLinus Torvalds * Returns 1 if the block is one of the special blocks that needs 6791da177e4SLinus Torvalds * to get read/written with the KD variant of the command. 6801da177e4SLinus Torvalds * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and 6811da177e4SLinus Torvalds * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. 6821da177e4SLinus Torvalds * Luckily the KD variants differ only by one bit (0x08) from the 6831da177e4SLinus Torvalds * normal variant. So don't wonder about code like: 6841da177e4SLinus Torvalds * if (dasd_eckd_cdl_special(blk_per_trk, recid)) 6851da177e4SLinus Torvalds * ccw->cmd_code |= 0x8; 6861da177e4SLinus Torvalds */ 6871da177e4SLinus Torvalds static inline int 6881da177e4SLinus Torvalds dasd_eckd_cdl_special(int blk_per_trk, int recid) 6891da177e4SLinus Torvalds { 6901da177e4SLinus Torvalds if (recid < 3) 6911da177e4SLinus Torvalds return 1; 6921da177e4SLinus Torvalds if (recid < blk_per_trk) 6931da177e4SLinus Torvalds return 0; 6941da177e4SLinus Torvalds if (recid < 2 * blk_per_trk) 6951da177e4SLinus Torvalds return 1; 6961da177e4SLinus Torvalds return 0; 6971da177e4SLinus Torvalds } 6981da177e4SLinus Torvalds 6991da177e4SLinus Torvalds /* 7001da177e4SLinus Torvalds * Returns the record size for the special blocks of the cdl format. 7011da177e4SLinus Torvalds * Only returns something useful if dasd_eckd_cdl_special is true 7021da177e4SLinus Torvalds * for the recid. 7031da177e4SLinus Torvalds */ 7041da177e4SLinus Torvalds static inline int 7051da177e4SLinus Torvalds dasd_eckd_cdl_reclen(int recid) 7061da177e4SLinus Torvalds { 7071da177e4SLinus Torvalds if (recid < 3) 7081da177e4SLinus Torvalds return sizes_trk0[recid]; 7091da177e4SLinus Torvalds return LABEL_SIZE; 7101da177e4SLinus Torvalds } 7111da177e4SLinus Torvalds 7123d052595SHorst Hummel /* 7133d052595SHorst Hummel * Generate device unique id that specifies the physical device. 7143d052595SHorst Hummel */ 7152dedf0d9SStefan Haberland static int dasd_eckd_generate_uid(struct dasd_device *device) 7163d052595SHorst Hummel { 7173d052595SHorst Hummel struct dasd_eckd_private *private; 7182dedf0d9SStefan Haberland struct dasd_uid *uid; 7194abb08c2SStefan Weinhuber int count; 7202dedf0d9SStefan Haberland unsigned long flags; 7213d052595SHorst Hummel 7223d052595SHorst Hummel private = (struct dasd_eckd_private *) device->private; 7233d052595SHorst Hummel if (!private) 7243d052595SHorst Hummel return -ENODEV; 7254abb08c2SStefan Weinhuber if (!private->ned || !private->gneq) 7263d052595SHorst Hummel return -ENODEV; 7272dedf0d9SStefan Haberland uid = &private->uid; 7282dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 7293d052595SHorst Hummel memset(uid, 0, sizeof(struct dasd_uid)); 7304abb08c2SStefan Weinhuber memcpy(uid->vendor, private->ned->HDA_manufacturer, 7313d052595SHorst Hummel sizeof(uid->vendor) - 1); 7323d052595SHorst Hummel EBCASC(uid->vendor, sizeof(uid->vendor) - 1); 7334abb08c2SStefan Weinhuber memcpy(uid->serial, private->ned->HDA_location, 7343d052595SHorst Hummel sizeof(uid->serial) - 1); 7353d052595SHorst Hummel EBCASC(uid->serial, sizeof(uid->serial) - 1); 7364abb08c2SStefan Weinhuber uid->ssid = private->gneq->subsystemID; 737a419aef8SJoe Perches uid->real_unit_addr = private->ned->unit_addr; 7384abb08c2SStefan Weinhuber if (private->sneq) { 7394abb08c2SStefan Weinhuber uid->type = private->sneq->sua_flags; 7408e09f215SStefan Weinhuber if (uid->type == UA_BASE_PAV_ALIAS) 7414abb08c2SStefan Weinhuber uid->base_unit_addr = private->sneq->base_unit_addr; 7428e09f215SStefan Weinhuber } else { 7438e09f215SStefan Weinhuber uid->type = UA_BASE_DEVICE; 7448e09f215SStefan Weinhuber } 7454abb08c2SStefan Weinhuber if (private->vdsneq) { 7464abb08c2SStefan Weinhuber for (count = 0; count < 16; count++) { 7474abb08c2SStefan Weinhuber sprintf(uid->vduit+2*count, "%02x", 7484abb08c2SStefan Weinhuber private->vdsneq->uit[count]); 7494abb08c2SStefan Weinhuber } 7504abb08c2SStefan Weinhuber } 7512dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 7523d052595SHorst Hummel return 0; 7533d052595SHorst Hummel } 7543d052595SHorst Hummel 7552dedf0d9SStefan Haberland static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid) 7562dedf0d9SStefan Haberland { 7572dedf0d9SStefan Haberland struct dasd_eckd_private *private; 7582dedf0d9SStefan Haberland unsigned long flags; 7592dedf0d9SStefan Haberland 7602dedf0d9SStefan Haberland if (device->private) { 7612dedf0d9SStefan Haberland private = (struct dasd_eckd_private *)device->private; 7622dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 7632dedf0d9SStefan Haberland *uid = private->uid; 7642dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 7652dedf0d9SStefan Haberland return 0; 7662dedf0d9SStefan Haberland } 7672dedf0d9SStefan Haberland return -EINVAL; 7682dedf0d9SStefan Haberland } 7692dedf0d9SStefan Haberland 770a4d26c6aSStefan Weinhuber static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device, 771a4d26c6aSStefan Weinhuber struct dasd_ccw_req *cqr, 772a4d26c6aSStefan Weinhuber __u8 *rcd_buffer, 773a4d26c6aSStefan Weinhuber __u8 lpm) 77417283b56SCornelia Huck { 77517283b56SCornelia Huck struct ccw1 *ccw; 776a4d26c6aSStefan Weinhuber /* 777a4d26c6aSStefan Weinhuber * buffer has to start with EBCDIC "V1.0" to show 778a4d26c6aSStefan Weinhuber * support for virtual device SNEQ 779a4d26c6aSStefan Weinhuber */ 780a4d26c6aSStefan Weinhuber rcd_buffer[0] = 0xE5; 781a4d26c6aSStefan Weinhuber rcd_buffer[1] = 0xF1; 782a4d26c6aSStefan Weinhuber rcd_buffer[2] = 0x4B; 783a4d26c6aSStefan Weinhuber rcd_buffer[3] = 0xF0; 78417283b56SCornelia Huck 78517283b56SCornelia Huck ccw = cqr->cpaddr; 786a4d26c6aSStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RCD; 787a4d26c6aSStefan Weinhuber ccw->flags = 0; 78817283b56SCornelia Huck ccw->cda = (__u32)(addr_t)rcd_buffer; 789a4d26c6aSStefan Weinhuber ccw->count = DASD_ECKD_RCD_DATA_SIZE; 790a4d26c6aSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 79117283b56SCornelia Huck 7928e09f215SStefan Weinhuber cqr->startdev = device; 7938e09f215SStefan Weinhuber cqr->memdev = device; 7948e09f215SStefan Weinhuber cqr->block = NULL; 79517283b56SCornelia Huck cqr->expires = 10*HZ; 79617283b56SCornelia Huck cqr->lpm = lpm; 797eb6e199bSStefan Weinhuber cqr->retries = 256; 79817283b56SCornelia Huck cqr->buildclk = get_clock(); 79917283b56SCornelia Huck cqr->status = DASD_CQR_FILLED; 800a4d26c6aSStefan Weinhuber set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 801a4d26c6aSStefan Weinhuber } 802a4d26c6aSStefan Weinhuber 803a4d26c6aSStefan Weinhuber static int dasd_eckd_read_conf_immediately(struct dasd_device *device, 804a4d26c6aSStefan Weinhuber struct dasd_ccw_req *cqr, 805a4d26c6aSStefan Weinhuber __u8 *rcd_buffer, 806a4d26c6aSStefan Weinhuber __u8 lpm) 807a4d26c6aSStefan Weinhuber { 808a4d26c6aSStefan Weinhuber struct ciw *ciw; 809a4d26c6aSStefan Weinhuber int rc; 810a4d26c6aSStefan Weinhuber /* 811a4d26c6aSStefan Weinhuber * sanity check: scan for RCD command in extended SenseID data 812a4d26c6aSStefan Weinhuber * some devices do not support RCD 813a4d26c6aSStefan Weinhuber */ 814a4d26c6aSStefan Weinhuber ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 815a4d26c6aSStefan Weinhuber if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) 816a4d26c6aSStefan Weinhuber return -EOPNOTSUPP; 817a4d26c6aSStefan Weinhuber 818a4d26c6aSStefan Weinhuber dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm); 819a4d26c6aSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 8205a27e60dSStefan Weinhuber set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 821a4d26c6aSStefan Weinhuber cqr->retries = 5; 822a4d26c6aSStefan Weinhuber rc = dasd_sleep_on_immediatly(cqr); 823a4d26c6aSStefan Weinhuber return rc; 82417283b56SCornelia Huck } 82517283b56SCornelia Huck 82617283b56SCornelia Huck static int dasd_eckd_read_conf_lpm(struct dasd_device *device, 82717283b56SCornelia Huck void **rcd_buffer, 82817283b56SCornelia Huck int *rcd_buffer_size, __u8 lpm) 82917283b56SCornelia Huck { 83017283b56SCornelia Huck struct ciw *ciw; 83117283b56SCornelia Huck char *rcd_buf = NULL; 83217283b56SCornelia Huck int ret; 83317283b56SCornelia Huck struct dasd_ccw_req *cqr; 83417283b56SCornelia Huck 83517283b56SCornelia Huck /* 836a4d26c6aSStefan Weinhuber * sanity check: scan for RCD command in extended SenseID data 837a4d26c6aSStefan Weinhuber * some devices do not support RCD 83817283b56SCornelia Huck */ 83917283b56SCornelia Huck ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 840a4d26c6aSStefan Weinhuber if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) { 84117283b56SCornelia Huck ret = -EOPNOTSUPP; 84217283b56SCornelia Huck goto out_error; 84317283b56SCornelia Huck } 844a4d26c6aSStefan Weinhuber rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA); 84517283b56SCornelia Huck if (!rcd_buf) { 84617283b56SCornelia Huck ret = -ENOMEM; 84717283b56SCornelia Huck goto out_error; 84817283b56SCornelia Huck } 849a4d26c6aSStefan Weinhuber cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, 850a4d26c6aSStefan Weinhuber 0, /* use rcd_buf as data ara */ 851a4d26c6aSStefan Weinhuber device); 85217283b56SCornelia Huck if (IS_ERR(cqr)) { 853a4d26c6aSStefan Weinhuber DBF_DEV_EVENT(DBF_WARNING, device, "%s", 854a4d26c6aSStefan Weinhuber "Could not allocate RCD request"); 855a4d26c6aSStefan Weinhuber ret = -ENOMEM; 85617283b56SCornelia Huck goto out_error; 85717283b56SCornelia Huck } 858a4d26c6aSStefan Weinhuber dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm); 85917283b56SCornelia Huck ret = dasd_sleep_on(cqr); 86017283b56SCornelia Huck /* 86117283b56SCornelia Huck * on success we update the user input parms 86217283b56SCornelia Huck */ 8638e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 86417283b56SCornelia Huck if (ret) 86517283b56SCornelia Huck goto out_error; 86617283b56SCornelia Huck 867a4d26c6aSStefan Weinhuber *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE; 86817283b56SCornelia Huck *rcd_buffer = rcd_buf; 86917283b56SCornelia Huck return 0; 87017283b56SCornelia Huck out_error: 87117283b56SCornelia Huck kfree(rcd_buf); 87217283b56SCornelia Huck *rcd_buffer = NULL; 87317283b56SCornelia Huck *rcd_buffer_size = 0; 87417283b56SCornelia Huck return ret; 87517283b56SCornelia Huck } 87617283b56SCornelia Huck 8774abb08c2SStefan Weinhuber static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private) 8784abb08c2SStefan Weinhuber { 8794abb08c2SStefan Weinhuber 8804abb08c2SStefan Weinhuber struct dasd_sneq *sneq; 8814abb08c2SStefan Weinhuber int i, count; 8824abb08c2SStefan Weinhuber 8834abb08c2SStefan Weinhuber private->ned = NULL; 8844abb08c2SStefan Weinhuber private->sneq = NULL; 8854abb08c2SStefan Weinhuber private->vdsneq = NULL; 8864abb08c2SStefan Weinhuber private->gneq = NULL; 8874abb08c2SStefan Weinhuber count = private->conf_len / sizeof(struct dasd_sneq); 8884abb08c2SStefan Weinhuber sneq = (struct dasd_sneq *)private->conf_data; 8894abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 8904abb08c2SStefan Weinhuber if (sneq->flags.identifier == 1 && sneq->format == 1) 8914abb08c2SStefan Weinhuber private->sneq = sneq; 8924abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 1 && sneq->format == 4) 8934abb08c2SStefan Weinhuber private->vdsneq = (struct vd_sneq *)sneq; 8944abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 2) 8954abb08c2SStefan Weinhuber private->gneq = (struct dasd_gneq *)sneq; 8964abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 3 && sneq->res1 == 1) 8974abb08c2SStefan Weinhuber private->ned = (struct dasd_ned *)sneq; 8984abb08c2SStefan Weinhuber sneq++; 8994abb08c2SStefan Weinhuber } 9004abb08c2SStefan Weinhuber if (!private->ned || !private->gneq) { 9014abb08c2SStefan Weinhuber private->ned = NULL; 9024abb08c2SStefan Weinhuber private->sneq = NULL; 9034abb08c2SStefan Weinhuber private->vdsneq = NULL; 9044abb08c2SStefan Weinhuber private->gneq = NULL; 9054abb08c2SStefan Weinhuber return -EINVAL; 9064abb08c2SStefan Weinhuber } 9074abb08c2SStefan Weinhuber return 0; 9084abb08c2SStefan Weinhuber 9094abb08c2SStefan Weinhuber }; 9104abb08c2SStefan Weinhuber 9114abb08c2SStefan Weinhuber static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len) 9124abb08c2SStefan Weinhuber { 9134abb08c2SStefan Weinhuber struct dasd_gneq *gneq; 9144abb08c2SStefan Weinhuber int i, count, found; 9154abb08c2SStefan Weinhuber 9164abb08c2SStefan Weinhuber count = conf_len / sizeof(*gneq); 9174abb08c2SStefan Weinhuber gneq = (struct dasd_gneq *)conf_data; 9184abb08c2SStefan Weinhuber found = 0; 9194abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 9204abb08c2SStefan Weinhuber if (gneq->flags.identifier == 2) { 9214abb08c2SStefan Weinhuber found = 1; 9224abb08c2SStefan Weinhuber break; 9234abb08c2SStefan Weinhuber } 9244abb08c2SStefan Weinhuber gneq++; 9254abb08c2SStefan Weinhuber } 9264abb08c2SStefan Weinhuber if (found) 9274abb08c2SStefan Weinhuber return ((char *)gneq)[18] & 0x07; 9284abb08c2SStefan Weinhuber else 9294abb08c2SStefan Weinhuber return 0; 9304abb08c2SStefan Weinhuber } 9314abb08c2SStefan Weinhuber 9324abb08c2SStefan Weinhuber static int dasd_eckd_read_conf(struct dasd_device *device) 9331da177e4SLinus Torvalds { 9341da177e4SLinus Torvalds void *conf_data; 9351da177e4SLinus Torvalds int conf_len, conf_data_saved; 9361da177e4SLinus Torvalds int rc; 937a4d26c6aSStefan Weinhuber __u8 lpm, opm; 9381da177e4SLinus Torvalds struct dasd_eckd_private *private; 939a4d26c6aSStefan Weinhuber struct dasd_path *path_data; 9401da177e4SLinus Torvalds 9411da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 942a4d26c6aSStefan Weinhuber path_data = &device->path_data; 943a4d26c6aSStefan Weinhuber opm = ccw_device_get_path_mask(device->cdev); 9441da177e4SLinus Torvalds lpm = 0x80; 9451da177e4SLinus Torvalds conf_data_saved = 0; 9461da177e4SLinus Torvalds /* get configuration data per operational path */ 9471da177e4SLinus Torvalds for (lpm = 0x80; lpm; lpm>>= 1) { 948a4d26c6aSStefan Weinhuber if (lpm & opm) { 94917283b56SCornelia Huck rc = dasd_eckd_read_conf_lpm(device, &conf_data, 9501da177e4SLinus Torvalds &conf_len, lpm); 9511da177e4SLinus Torvalds if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ 952b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 9531da177e4SLinus Torvalds "Read configuration data returned " 954b8ed5dd5SStefan Haberland "error %d", rc); 9551da177e4SLinus Torvalds return rc; 9561da177e4SLinus Torvalds } 9571da177e4SLinus Torvalds if (conf_data == NULL) { 958b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 959b8ed5dd5SStefan Haberland "No configuration data " 960b8ed5dd5SStefan Haberland "retrieved"); 961a4d26c6aSStefan Weinhuber /* no further analysis possible */ 962a4d26c6aSStefan Weinhuber path_data->opm |= lpm; 963d133a960SGabriel Craciunescu continue; /* no error */ 9641da177e4SLinus Torvalds } 9651da177e4SLinus Torvalds /* save first valid configuration data */ 9661da177e4SLinus Torvalds if (!conf_data_saved) { 9674abb08c2SStefan Weinhuber kfree(private->conf_data); 9684abb08c2SStefan Weinhuber private->conf_data = conf_data; 9694abb08c2SStefan Weinhuber private->conf_len = conf_len; 9704abb08c2SStefan Weinhuber if (dasd_eckd_identify_conf_parts(private)) { 9714abb08c2SStefan Weinhuber private->conf_data = NULL; 9724abb08c2SStefan Weinhuber private->conf_len = 0; 9734abb08c2SStefan Weinhuber kfree(conf_data); 9744abb08c2SStefan Weinhuber continue; 9754abb08c2SStefan Weinhuber } 9761da177e4SLinus Torvalds conf_data_saved++; 9771da177e4SLinus Torvalds } 9784abb08c2SStefan Weinhuber switch (dasd_eckd_path_access(conf_data, conf_len)) { 9791da177e4SLinus Torvalds case 0x02: 9801da177e4SLinus Torvalds path_data->npm |= lpm; 9811da177e4SLinus Torvalds break; 9821da177e4SLinus Torvalds case 0x03: 9831da177e4SLinus Torvalds path_data->ppm |= lpm; 9841da177e4SLinus Torvalds break; 9851da177e4SLinus Torvalds } 986a4d26c6aSStefan Weinhuber path_data->opm |= lpm; 9874abb08c2SStefan Weinhuber if (conf_data != private->conf_data) 9881da177e4SLinus Torvalds kfree(conf_data); 9891da177e4SLinus Torvalds } 9901da177e4SLinus Torvalds } 9911da177e4SLinus Torvalds return 0; 9921da177e4SLinus Torvalds } 9931da177e4SLinus Torvalds 994a4d26c6aSStefan Weinhuber static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm) 995a4d26c6aSStefan Weinhuber { 996a4d26c6aSStefan Weinhuber struct dasd_eckd_private *private; 997a4d26c6aSStefan Weinhuber int mdc; 998a4d26c6aSStefan Weinhuber u32 fcx_max_data; 999a4d26c6aSStefan Weinhuber 1000a4d26c6aSStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 1001a4d26c6aSStefan Weinhuber if (private->fcx_max_data) { 1002a4d26c6aSStefan Weinhuber mdc = ccw_device_get_mdc(device->cdev, lpm); 1003a4d26c6aSStefan Weinhuber if ((mdc < 0)) { 1004a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1005a4d26c6aSStefan Weinhuber "Detecting the maximum data size for zHPF " 1006a4d26c6aSStefan Weinhuber "requests failed (rc=%d) for a new path %x\n", 1007a4d26c6aSStefan Weinhuber mdc, lpm); 1008a4d26c6aSStefan Weinhuber return mdc; 1009a4d26c6aSStefan Weinhuber } 1010a4d26c6aSStefan Weinhuber fcx_max_data = mdc * FCX_MAX_DATA_FACTOR; 1011a4d26c6aSStefan Weinhuber if (fcx_max_data < private->fcx_max_data) { 1012a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1013a4d26c6aSStefan Weinhuber "The maximum data size for zHPF requests %u " 1014a4d26c6aSStefan Weinhuber "on a new path %x is below the active maximum " 1015a4d26c6aSStefan Weinhuber "%u\n", fcx_max_data, lpm, 1016a4d26c6aSStefan Weinhuber private->fcx_max_data); 1017a4d26c6aSStefan Weinhuber return -EACCES; 1018a4d26c6aSStefan Weinhuber } 1019a4d26c6aSStefan Weinhuber } 1020a4d26c6aSStefan Weinhuber return 0; 1021a4d26c6aSStefan Weinhuber } 1022a4d26c6aSStefan Weinhuber 1023a4d26c6aSStefan Weinhuber static void do_path_verification_work(struct work_struct *work) 1024a4d26c6aSStefan Weinhuber { 1025a4d26c6aSStefan Weinhuber struct path_verification_work_data *data; 1026a4d26c6aSStefan Weinhuber struct dasd_device *device; 1027a4d26c6aSStefan Weinhuber __u8 lpm, opm, npm, ppm, epm; 1028a4d26c6aSStefan Weinhuber unsigned long flags; 1029a4d26c6aSStefan Weinhuber int rc; 1030a4d26c6aSStefan Weinhuber 1031a4d26c6aSStefan Weinhuber data = container_of(work, struct path_verification_work_data, worker); 1032a4d26c6aSStefan Weinhuber device = data->device; 1033a4d26c6aSStefan Weinhuber 1034a4d26c6aSStefan Weinhuber opm = 0; 1035a4d26c6aSStefan Weinhuber npm = 0; 1036a4d26c6aSStefan Weinhuber ppm = 0; 1037a4d26c6aSStefan Weinhuber epm = 0; 1038a4d26c6aSStefan Weinhuber for (lpm = 0x80; lpm; lpm >>= 1) { 1039a4d26c6aSStefan Weinhuber if (lpm & data->tbvpm) { 1040a4d26c6aSStefan Weinhuber memset(data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1041a4d26c6aSStefan Weinhuber memset(&data->cqr, 0, sizeof(data->cqr)); 1042a4d26c6aSStefan Weinhuber data->cqr.cpaddr = &data->ccw; 1043a4d26c6aSStefan Weinhuber rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1044a4d26c6aSStefan Weinhuber data->rcd_buffer, 1045a4d26c6aSStefan Weinhuber lpm); 1046a4d26c6aSStefan Weinhuber if (!rc) { 1047a4d26c6aSStefan Weinhuber switch (dasd_eckd_path_access(data->rcd_buffer, 1048a4d26c6aSStefan Weinhuber DASD_ECKD_RCD_DATA_SIZE)) { 1049a4d26c6aSStefan Weinhuber case 0x02: 1050a4d26c6aSStefan Weinhuber npm |= lpm; 1051a4d26c6aSStefan Weinhuber break; 1052a4d26c6aSStefan Weinhuber case 0x03: 1053a4d26c6aSStefan Weinhuber ppm |= lpm; 1054a4d26c6aSStefan Weinhuber break; 1055a4d26c6aSStefan Weinhuber } 1056a4d26c6aSStefan Weinhuber opm |= lpm; 1057a4d26c6aSStefan Weinhuber } else if (rc == -EOPNOTSUPP) { 1058a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1059a4d26c6aSStefan Weinhuber "path verification: No configuration " 1060a4d26c6aSStefan Weinhuber "data retrieved"); 1061a4d26c6aSStefan Weinhuber opm |= lpm; 1062a4d26c6aSStefan Weinhuber } else if (rc == -EAGAIN) { 1063a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1064a4d26c6aSStefan Weinhuber "path verification: device is stopped," 1065a4d26c6aSStefan Weinhuber " try again later"); 1066a4d26c6aSStefan Weinhuber epm |= lpm; 1067a4d26c6aSStefan Weinhuber } else { 1068a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1069a4d26c6aSStefan Weinhuber "Reading device feature codes failed " 1070a4d26c6aSStefan Weinhuber "(rc=%d) for new path %x\n", rc, lpm); 1071a4d26c6aSStefan Weinhuber continue; 1072a4d26c6aSStefan Weinhuber } 1073a4d26c6aSStefan Weinhuber if (verify_fcx_max_data(device, lpm)) { 1074a4d26c6aSStefan Weinhuber opm &= ~lpm; 1075a4d26c6aSStefan Weinhuber npm &= ~lpm; 1076a4d26c6aSStefan Weinhuber ppm &= ~lpm; 1077a4d26c6aSStefan Weinhuber } 1078a4d26c6aSStefan Weinhuber } 1079a4d26c6aSStefan Weinhuber } 1080a4d26c6aSStefan Weinhuber /* 1081a4d26c6aSStefan Weinhuber * There is a small chance that a path is lost again between 1082a4d26c6aSStefan Weinhuber * above path verification and the following modification of 1083a4d26c6aSStefan Weinhuber * the device opm mask. We could avoid that race here by using 1084a4d26c6aSStefan Weinhuber * yet another path mask, but we rather deal with this unlikely 1085a4d26c6aSStefan Weinhuber * situation in dasd_start_IO. 1086a4d26c6aSStefan Weinhuber */ 1087a4d26c6aSStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1088a4d26c6aSStefan Weinhuber if (!device->path_data.opm && opm) { 1089a4d26c6aSStefan Weinhuber device->path_data.opm = opm; 1090a4d26c6aSStefan Weinhuber dasd_generic_path_operational(device); 1091a4d26c6aSStefan Weinhuber } else 1092a4d26c6aSStefan Weinhuber device->path_data.opm |= opm; 1093a4d26c6aSStefan Weinhuber device->path_data.npm |= npm; 1094a4d26c6aSStefan Weinhuber device->path_data.ppm |= ppm; 1095a4d26c6aSStefan Weinhuber device->path_data.tbvpm |= epm; 1096a4d26c6aSStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1097a4d26c6aSStefan Weinhuber 1098a4d26c6aSStefan Weinhuber dasd_put_device(device); 1099a4d26c6aSStefan Weinhuber if (data->isglobal) 1100a4d26c6aSStefan Weinhuber mutex_unlock(&dasd_path_verification_mutex); 1101a4d26c6aSStefan Weinhuber else 1102a4d26c6aSStefan Weinhuber kfree(data); 1103a4d26c6aSStefan Weinhuber } 1104a4d26c6aSStefan Weinhuber 1105a4d26c6aSStefan Weinhuber static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm) 1106a4d26c6aSStefan Weinhuber { 1107a4d26c6aSStefan Weinhuber struct path_verification_work_data *data; 1108a4d26c6aSStefan Weinhuber 1109a4d26c6aSStefan Weinhuber data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA); 1110a4d26c6aSStefan Weinhuber if (!data) { 1111a4d26c6aSStefan Weinhuber if (mutex_trylock(&dasd_path_verification_mutex)) { 1112a4d26c6aSStefan Weinhuber data = path_verification_worker; 1113a4d26c6aSStefan Weinhuber data->isglobal = 1; 1114a4d26c6aSStefan Weinhuber } else 1115a4d26c6aSStefan Weinhuber return -ENOMEM; 1116a4d26c6aSStefan Weinhuber } else { 1117a4d26c6aSStefan Weinhuber memset(data, 0, sizeof(*data)); 1118a4d26c6aSStefan Weinhuber data->isglobal = 0; 1119a4d26c6aSStefan Weinhuber } 1120a4d26c6aSStefan Weinhuber INIT_WORK(&data->worker, do_path_verification_work); 1121a4d26c6aSStefan Weinhuber dasd_get_device(device); 1122a4d26c6aSStefan Weinhuber data->device = device; 1123a4d26c6aSStefan Weinhuber data->tbvpm = lpm; 1124a4d26c6aSStefan Weinhuber schedule_work(&data->worker); 1125a4d26c6aSStefan Weinhuber return 0; 1126a4d26c6aSStefan Weinhuber } 1127a4d26c6aSStefan Weinhuber 11288e09f215SStefan Weinhuber static int dasd_eckd_read_features(struct dasd_device *device) 11298e09f215SStefan Weinhuber { 11308e09f215SStefan Weinhuber struct dasd_psf_prssd_data *prssdp; 11318e09f215SStefan Weinhuber struct dasd_rssd_features *features; 11328e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 11338e09f215SStefan Weinhuber struct ccw1 *ccw; 11348e09f215SStefan Weinhuber int rc; 11358e09f215SStefan Weinhuber struct dasd_eckd_private *private; 11368e09f215SStefan Weinhuber 11378e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 113868d1e5f0SStefan Weinhuber memset(&private->features, 0, sizeof(struct dasd_rssd_features)); 113968b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 11408e09f215SStefan Weinhuber (sizeof(struct dasd_psf_prssd_data) + 11418e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)), 11428e09f215SStefan Weinhuber device); 11438e09f215SStefan Weinhuber if (IS_ERR(cqr)) { 1144b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " 1145b8ed5dd5SStefan Haberland "allocate initialization request"); 11468e09f215SStefan Weinhuber return PTR_ERR(cqr); 11478e09f215SStefan Weinhuber } 11488e09f215SStefan Weinhuber cqr->startdev = device; 11498e09f215SStefan Weinhuber cqr->memdev = device; 11508e09f215SStefan Weinhuber cqr->block = NULL; 1151eb6e199bSStefan Weinhuber cqr->retries = 256; 11528e09f215SStefan Weinhuber cqr->expires = 10 * HZ; 11538e09f215SStefan Weinhuber 11548e09f215SStefan Weinhuber /* Prepare for Read Subsystem Data */ 11558e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 11568e09f215SStefan Weinhuber memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 11578e09f215SStefan Weinhuber prssdp->order = PSF_ORDER_PRSSD; 11588e09f215SStefan Weinhuber prssdp->suborder = 0x41; /* Read Feature Codes */ 11598e09f215SStefan Weinhuber /* all other bytes of prssdp must be zero */ 11608e09f215SStefan Weinhuber 11618e09f215SStefan Weinhuber ccw = cqr->cpaddr; 11628e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PSF; 11638e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_psf_prssd_data); 11648e09f215SStefan Weinhuber ccw->flags |= CCW_FLAG_CC; 11658e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) prssdp; 11668e09f215SStefan Weinhuber 11678e09f215SStefan Weinhuber /* Read Subsystem Data - feature codes */ 11688e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 11698e09f215SStefan Weinhuber memset(features, 0, sizeof(struct dasd_rssd_features)); 11708e09f215SStefan Weinhuber 11718e09f215SStefan Weinhuber ccw++; 11728e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RSSD; 11738e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_rssd_features); 11748e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) features; 11758e09f215SStefan Weinhuber 11768e09f215SStefan Weinhuber cqr->buildclk = get_clock(); 11778e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 11788e09f215SStefan Weinhuber rc = dasd_sleep_on(cqr); 11798e09f215SStefan Weinhuber if (rc == 0) { 11808e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 11818e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 11828e09f215SStefan Weinhuber memcpy(&private->features, features, 11838e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)); 118468d1e5f0SStefan Weinhuber } else 118568d1e5f0SStefan Weinhuber dev_warn(&device->cdev->dev, "Reading device feature codes" 118668d1e5f0SStefan Weinhuber " failed with rc=%d\n", rc); 11878e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 11888e09f215SStefan Weinhuber return rc; 11898e09f215SStefan Weinhuber } 11908e09f215SStefan Weinhuber 11918e09f215SStefan Weinhuber 11923d052595SHorst Hummel /* 119340545573SHorst Hummel * Build CP for Perform Subsystem Function - SSC. 119440545573SHorst Hummel */ 1195f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, 1196f3eb5384SStefan Weinhuber int enable_pav) 119740545573SHorst Hummel { 119840545573SHorst Hummel struct dasd_ccw_req *cqr; 119940545573SHorst Hummel struct dasd_psf_ssc_data *psf_ssc_data; 120040545573SHorst Hummel struct ccw1 *ccw; 120140545573SHorst Hummel 120268b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 120340545573SHorst Hummel sizeof(struct dasd_psf_ssc_data), 120440545573SHorst Hummel device); 120540545573SHorst Hummel 120640545573SHorst Hummel if (IS_ERR(cqr)) { 1207fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 120840545573SHorst Hummel "Could not allocate PSF-SSC request"); 120940545573SHorst Hummel return cqr; 121040545573SHorst Hummel } 121140545573SHorst Hummel psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 121240545573SHorst Hummel psf_ssc_data->order = PSF_ORDER_SSC; 1213626350b6SStefan Weinhuber psf_ssc_data->suborder = 0xc0; 1214f3eb5384SStefan Weinhuber if (enable_pav) { 1215626350b6SStefan Weinhuber psf_ssc_data->suborder |= 0x08; 12168e09f215SStefan Weinhuber psf_ssc_data->reserved[0] = 0x88; 1217f3eb5384SStefan Weinhuber } 121840545573SHorst Hummel ccw = cqr->cpaddr; 121940545573SHorst Hummel ccw->cmd_code = DASD_ECKD_CCW_PSF; 122040545573SHorst Hummel ccw->cda = (__u32)(addr_t)psf_ssc_data; 122140545573SHorst Hummel ccw->count = 66; 122240545573SHorst Hummel 12238e09f215SStefan Weinhuber cqr->startdev = device; 12248e09f215SStefan Weinhuber cqr->memdev = device; 12258e09f215SStefan Weinhuber cqr->block = NULL; 1226eb6e199bSStefan Weinhuber cqr->retries = 256; 122740545573SHorst Hummel cqr->expires = 10*HZ; 122840545573SHorst Hummel cqr->buildclk = get_clock(); 122940545573SHorst Hummel cqr->status = DASD_CQR_FILLED; 123040545573SHorst Hummel return cqr; 123140545573SHorst Hummel } 123240545573SHorst Hummel 123340545573SHorst Hummel /* 123440545573SHorst Hummel * Perform Subsystem Function. 123540545573SHorst Hummel * It is necessary to trigger CIO for channel revalidation since this 123640545573SHorst Hummel * call might change behaviour of DASD devices. 123740545573SHorst Hummel */ 123840545573SHorst Hummel static int 1239f3eb5384SStefan Weinhuber dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav) 124040545573SHorst Hummel { 124140545573SHorst Hummel struct dasd_ccw_req *cqr; 124240545573SHorst Hummel int rc; 124340545573SHorst Hummel 1244f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_psf_ssc(device, enable_pav); 124540545573SHorst Hummel if (IS_ERR(cqr)) 124640545573SHorst Hummel return PTR_ERR(cqr); 124740545573SHorst Hummel 124840545573SHorst Hummel rc = dasd_sleep_on(cqr); 124940545573SHorst Hummel if (!rc) 125040545573SHorst Hummel /* trigger CIO to reprobe devices */ 125140545573SHorst Hummel css_schedule_reprobe(); 12528e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 125340545573SHorst Hummel return rc; 125440545573SHorst Hummel } 125540545573SHorst Hummel 125640545573SHorst Hummel /* 125740545573SHorst Hummel * Valide storage server of current device. 125840545573SHorst Hummel */ 1259f4ac1d02SStefan Weinhuber static void dasd_eckd_validate_server(struct dasd_device *device) 126040545573SHorst Hummel { 126140545573SHorst Hummel int rc; 12628e09f215SStefan Weinhuber struct dasd_eckd_private *private; 1263f3eb5384SStefan Weinhuber int enable_pav; 126440545573SHorst Hummel 126540545573SHorst Hummel if (dasd_nopav || MACHINE_IS_VM) 1266f3eb5384SStefan Weinhuber enable_pav = 0; 1267f3eb5384SStefan Weinhuber else 1268f3eb5384SStefan Weinhuber enable_pav = 1; 1269f3eb5384SStefan Weinhuber rc = dasd_eckd_psf_ssc(device, enable_pav); 1270eb6e199bSStefan Weinhuber 127140545573SHorst Hummel /* may be requested feature is not available on server, 127240545573SHorst Hummel * therefore just report error and go ahead */ 12738e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 1274b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " 1275b8ed5dd5SStefan Haberland "returned rc=%d", private->uid.ssid, rc); 127640545573SHorst Hummel } 127740545573SHorst Hummel 1278ef19298bSStefan Weinhuber static u32 get_fcx_max_data(struct dasd_device *device) 1279ef19298bSStefan Weinhuber { 1280ef19298bSStefan Weinhuber #if defined(CONFIG_64BIT) 1281ef19298bSStefan Weinhuber int tpm, mdc; 1282ef19298bSStefan Weinhuber int fcx_in_css, fcx_in_gneq, fcx_in_features; 1283ef19298bSStefan Weinhuber struct dasd_eckd_private *private; 1284ef19298bSStefan Weinhuber 1285ef19298bSStefan Weinhuber if (dasd_nofcx) 1286ef19298bSStefan Weinhuber return 0; 1287ef19298bSStefan Weinhuber /* is transport mode supported? */ 1288ef19298bSStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 1289ef19298bSStefan Weinhuber fcx_in_css = css_general_characteristics.fcx; 1290ef19298bSStefan Weinhuber fcx_in_gneq = private->gneq->reserved2[7] & 0x04; 1291ef19298bSStefan Weinhuber fcx_in_features = private->features.feature[40] & 0x80; 1292ef19298bSStefan Weinhuber tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; 1293ef19298bSStefan Weinhuber 1294ef19298bSStefan Weinhuber if (!tpm) 1295ef19298bSStefan Weinhuber return 0; 1296ef19298bSStefan Weinhuber 1297ef19298bSStefan Weinhuber mdc = ccw_device_get_mdc(device->cdev, 0); 1298ef19298bSStefan Weinhuber if (mdc < 0) { 1299ef19298bSStefan Weinhuber dev_warn(&device->cdev->dev, "Detecting the maximum supported" 1300ef19298bSStefan Weinhuber " data size for zHPF requests failed\n"); 1301ef19298bSStefan Weinhuber return 0; 1302ef19298bSStefan Weinhuber } else 1303ef19298bSStefan Weinhuber return mdc * FCX_MAX_DATA_FACTOR; 1304ef19298bSStefan Weinhuber #else 1305ef19298bSStefan Weinhuber return 0; 1306ef19298bSStefan Weinhuber #endif 1307ef19298bSStefan Weinhuber } 1308ef19298bSStefan Weinhuber 130940545573SHorst Hummel /* 13103d052595SHorst Hummel * Check device characteristics. 13113d052595SHorst Hummel * If the device is accessible using ECKD discipline, the device is enabled. 13123d052595SHorst Hummel */ 13131da177e4SLinus Torvalds static int 13141da177e4SLinus Torvalds dasd_eckd_check_characteristics(struct dasd_device *device) 13151da177e4SLinus Torvalds { 13161da177e4SLinus Torvalds struct dasd_eckd_private *private; 13178e09f215SStefan Weinhuber struct dasd_block *block; 13182dedf0d9SStefan Haberland struct dasd_uid temp_uid; 13197c8faa86SStefan Haberland int is_known, rc, i; 132033b62a30SStefan Weinhuber int readonly; 13217c8faa86SStefan Haberland unsigned long value; 13221da177e4SLinus Torvalds 1323454e1fa1SPeter Oberparleiter if (!ccw_device_is_pathgroup(device->cdev)) { 1324454e1fa1SPeter Oberparleiter dev_warn(&device->cdev->dev, 1325454e1fa1SPeter Oberparleiter "A channel path group could not be established\n"); 1326454e1fa1SPeter Oberparleiter return -EIO; 1327454e1fa1SPeter Oberparleiter } 1328454e1fa1SPeter Oberparleiter if (!ccw_device_is_multipath(device->cdev)) { 1329454e1fa1SPeter Oberparleiter dev_info(&device->cdev->dev, 1330454e1fa1SPeter Oberparleiter "The DASD is not operating in multipath mode\n"); 1331454e1fa1SPeter Oberparleiter } 13321da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 133392636b15SSebastian Ott if (!private) { 133492636b15SSebastian Ott private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); 133592636b15SSebastian Ott if (!private) { 1336fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1337fc19f381SStefan Haberland "Allocating memory for private DASD data " 1338fc19f381SStefan Haberland "failed\n"); 13391da177e4SLinus Torvalds return -ENOMEM; 13401da177e4SLinus Torvalds } 13411da177e4SLinus Torvalds device->private = (void *) private; 134292636b15SSebastian Ott } else { 134392636b15SSebastian Ott memset(private, 0, sizeof(*private)); 13441da177e4SLinus Torvalds } 13451da177e4SLinus Torvalds /* Invalidate status of initial analysis. */ 13461da177e4SLinus Torvalds private->init_cqr_status = -1; 13471da177e4SLinus Torvalds /* Set default cache operations. */ 13481da177e4SLinus Torvalds private->attrib.operation = DASD_NORMAL_CACHE; 13491da177e4SLinus Torvalds private->attrib.nr_cyl = 0; 13501da177e4SLinus Torvalds 135140545573SHorst Hummel /* Read Configuration Data */ 135240545573SHorst Hummel rc = dasd_eckd_read_conf(device); 135340545573SHorst Hummel if (rc) 13548e09f215SStefan Weinhuber goto out_err1; 135540545573SHorst Hummel 13567c8faa86SStefan Haberland /* set default timeout */ 13577c8faa86SStefan Haberland device->default_expires = DASD_EXPIRES; 13587c8faa86SStefan Haberland if (private->gneq) { 13597c8faa86SStefan Haberland value = 1; 13607c8faa86SStefan Haberland for (i = 0; i < private->gneq->timeout.value; i++) 13617c8faa86SStefan Haberland value = 10 * value; 13627c8faa86SStefan Haberland value = value * private->gneq->timeout.number; 13637c8faa86SStefan Haberland /* do not accept useless values */ 13647c8faa86SStefan Haberland if (value != 0 && value <= DASD_EXPIRES_MAX) 13657c8faa86SStefan Haberland device->default_expires = value; 13667c8faa86SStefan Haberland } 13677c8faa86SStefan Haberland 13682dedf0d9SStefan Haberland /* Generate device unique id */ 13692dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 137040545573SHorst Hummel if (rc) 13718e09f215SStefan Weinhuber goto out_err1; 13728e09f215SStefan Weinhuber 13732dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 13742dedf0d9SStefan Haberland if (temp_uid.type == UA_BASE_DEVICE) { 13758e09f215SStefan Weinhuber block = dasd_alloc_block(); 13768e09f215SStefan Weinhuber if (IS_ERR(block)) { 1377b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1378b8ed5dd5SStefan Haberland "could not allocate dasd " 1379b8ed5dd5SStefan Haberland "block structure"); 13808e09f215SStefan Weinhuber rc = PTR_ERR(block); 13818e09f215SStefan Weinhuber goto out_err1; 13828e09f215SStefan Weinhuber } 13838e09f215SStefan Weinhuber device->block = block; 13848e09f215SStefan Weinhuber block->base = device; 13858e09f215SStefan Weinhuber } 13868e09f215SStefan Weinhuber 13878e09f215SStefan Weinhuber /* register lcu with alias handling, enable PAV if this is a new lcu */ 13888e09f215SStefan Weinhuber is_known = dasd_alias_make_device_known_to_lcu(device); 13898e09f215SStefan Weinhuber if (is_known < 0) { 13908e09f215SStefan Weinhuber rc = is_known; 13918e09f215SStefan Weinhuber goto out_err2; 13928e09f215SStefan Weinhuber } 1393f4ac1d02SStefan Weinhuber /* 1394817f2c84SNikanth Karthikesan * dasd_eckd_validate_server is done on the first device that 1395f4ac1d02SStefan Weinhuber * is found for an LCU. All later other devices have to wait 1396f4ac1d02SStefan Weinhuber * for it, so they will read the correct feature codes. 1397f4ac1d02SStefan Weinhuber */ 13988e09f215SStefan Weinhuber if (!is_known) { 1399f4ac1d02SStefan Weinhuber dasd_eckd_validate_server(device); 1400f4ac1d02SStefan Weinhuber dasd_alias_lcu_setup_complete(device); 1401f4ac1d02SStefan Weinhuber } else 1402f4ac1d02SStefan Weinhuber dasd_alias_wait_for_lcu_setup(device); 1403f4ac1d02SStefan Weinhuber 1404f4ac1d02SStefan Weinhuber /* device may report different configuration data after LCU setup */ 1405f4ac1d02SStefan Weinhuber rc = dasd_eckd_read_conf(device); 140640545573SHorst Hummel if (rc) 14078e09f215SStefan Weinhuber goto out_err3; 14088e09f215SStefan Weinhuber 14098e09f215SStefan Weinhuber /* Read Feature Codes */ 141068d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 141140545573SHorst Hummel 14121da177e4SLinus Torvalds /* Read Device Characteristics */ 141368b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 141468b781feSStefan Haberland &private->rdc_data, 64); 14158e09f215SStefan Weinhuber if (rc) { 1416b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1417b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 14188e09f215SStefan Weinhuber goto out_err3; 14198e09f215SStefan Weinhuber } 1420817f2c84SNikanth Karthikesan /* find the valid cylinder size */ 1421b44b0ab3SStefan Weinhuber if (private->rdc_data.no_cyl == LV_COMPAT_CYL && 1422b44b0ab3SStefan Weinhuber private->rdc_data.long_no_cyl) 1423b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.long_no_cyl; 1424b44b0ab3SStefan Weinhuber else 1425b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.no_cyl; 1426b44b0ab3SStefan Weinhuber 1427ef19298bSStefan Weinhuber private->fcx_max_data = get_fcx_max_data(device); 1428ef19298bSStefan Weinhuber 142933b62a30SStefan Weinhuber readonly = dasd_device_is_ro(device); 143033b62a30SStefan Weinhuber if (readonly) 143133b62a30SStefan Weinhuber set_bit(DASD_FLAG_DEVICE_RO, &device->flags); 143233b62a30SStefan Weinhuber 1433fc19f381SStefan Haberland dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " 143433b62a30SStefan Weinhuber "with %d cylinders, %d heads, %d sectors%s\n", 14351da177e4SLinus Torvalds private->rdc_data.dev_type, 14361da177e4SLinus Torvalds private->rdc_data.dev_model, 14371da177e4SLinus Torvalds private->rdc_data.cu_type, 14381da177e4SLinus Torvalds private->rdc_data.cu_model.model, 1439b44b0ab3SStefan Weinhuber private->real_cyl, 14401da177e4SLinus Torvalds private->rdc_data.trk_per_cyl, 144133b62a30SStefan Weinhuber private->rdc_data.sec_per_trk, 144233b62a30SStefan Weinhuber readonly ? ", read-only device" : ""); 14438e09f215SStefan Weinhuber return 0; 14448e09f215SStefan Weinhuber 14458e09f215SStefan Weinhuber out_err3: 14468e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 14478e09f215SStefan Weinhuber out_err2: 14488e09f215SStefan Weinhuber dasd_free_block(device->block); 14498e09f215SStefan Weinhuber device->block = NULL; 14508e09f215SStefan Weinhuber out_err1: 14514abb08c2SStefan Weinhuber kfree(private->conf_data); 14528e09f215SStefan Weinhuber kfree(device->private); 14538e09f215SStefan Weinhuber device->private = NULL; 14543d052595SHorst Hummel return rc; 14551da177e4SLinus Torvalds } 14561da177e4SLinus Torvalds 14578e09f215SStefan Weinhuber static void dasd_eckd_uncheck_device(struct dasd_device *device) 14588e09f215SStefan Weinhuber { 14594abb08c2SStefan Weinhuber struct dasd_eckd_private *private; 14604abb08c2SStefan Weinhuber 14614abb08c2SStefan Weinhuber private = (struct dasd_eckd_private *) device->private; 14628e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 14634abb08c2SStefan Weinhuber private->ned = NULL; 14644abb08c2SStefan Weinhuber private->sneq = NULL; 14654abb08c2SStefan Weinhuber private->vdsneq = NULL; 14664abb08c2SStefan Weinhuber private->gneq = NULL; 14674abb08c2SStefan Weinhuber private->conf_len = 0; 14684abb08c2SStefan Weinhuber kfree(private->conf_data); 14694abb08c2SStefan Weinhuber private->conf_data = NULL; 14708e09f215SStefan Weinhuber } 14718e09f215SStefan Weinhuber 14721da177e4SLinus Torvalds static struct dasd_ccw_req * 14731da177e4SLinus Torvalds dasd_eckd_analysis_ccw(struct dasd_device *device) 14741da177e4SLinus Torvalds { 14751da177e4SLinus Torvalds struct dasd_eckd_private *private; 14761da177e4SLinus Torvalds struct eckd_count *count_data; 14771da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 14781da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 14791da177e4SLinus Torvalds struct ccw1 *ccw; 14801da177e4SLinus Torvalds int cplength, datasize; 14811da177e4SLinus Torvalds int i; 14821da177e4SLinus Torvalds 14831da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 14841da177e4SLinus Torvalds 14851da177e4SLinus Torvalds cplength = 8; 14861da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 148768b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 14881da177e4SLinus Torvalds if (IS_ERR(cqr)) 14891da177e4SLinus Torvalds return cqr; 14901da177e4SLinus Torvalds ccw = cqr->cpaddr; 14911da177e4SLinus Torvalds /* Define extent for the first 3 tracks. */ 14921da177e4SLinus Torvalds define_extent(ccw++, cqr->data, 0, 2, 14931da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device); 14941da177e4SLinus Torvalds LO_data = cqr->data + sizeof(struct DE_eckd_data); 14951da177e4SLinus Torvalds /* Locate record for the first 4 records on track 0. */ 14961da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 14971da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 0, 0, 4, 14981da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 14991da177e4SLinus Torvalds 15001da177e4SLinus Torvalds count_data = private->count_area; 15011da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 15021da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 15031da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 15041da177e4SLinus Torvalds ccw->flags = 0; 15051da177e4SLinus Torvalds ccw->count = 8; 15061da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 15071da177e4SLinus Torvalds ccw++; 15081da177e4SLinus Torvalds count_data++; 15091da177e4SLinus Torvalds } 15101da177e4SLinus Torvalds 15111da177e4SLinus Torvalds /* Locate record for the first record on track 2. */ 15121da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 15131da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 2, 0, 1, 15141da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 15151da177e4SLinus Torvalds /* Read count ccw. */ 15161da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 15171da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 15181da177e4SLinus Torvalds ccw->flags = 0; 15191da177e4SLinus Torvalds ccw->count = 8; 15201da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 15211da177e4SLinus Torvalds 15228e09f215SStefan Weinhuber cqr->block = NULL; 15238e09f215SStefan Weinhuber cqr->startdev = device; 15248e09f215SStefan Weinhuber cqr->memdev = device; 1525eb6e199bSStefan Weinhuber cqr->retries = 255; 15261da177e4SLinus Torvalds cqr->buildclk = get_clock(); 15271da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 15281da177e4SLinus Torvalds return cqr; 15291da177e4SLinus Torvalds } 15301da177e4SLinus Torvalds 1531eb6e199bSStefan Weinhuber /* differentiate between 'no record found' and any other error */ 1532eb6e199bSStefan Weinhuber static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) 1533eb6e199bSStefan Weinhuber { 1534eb6e199bSStefan Weinhuber char *sense; 1535eb6e199bSStefan Weinhuber if (init_cqr->status == DASD_CQR_DONE) 1536eb6e199bSStefan Weinhuber return INIT_CQR_OK; 1537eb6e199bSStefan Weinhuber else if (init_cqr->status == DASD_CQR_NEED_ERP || 1538eb6e199bSStefan Weinhuber init_cqr->status == DASD_CQR_FAILED) { 1539eb6e199bSStefan Weinhuber sense = dasd_get_sense(&init_cqr->irb); 1540eb6e199bSStefan Weinhuber if (sense && (sense[1] & SNS1_NO_REC_FOUND)) 1541eb6e199bSStefan Weinhuber return INIT_CQR_UNFORMATTED; 1542eb6e199bSStefan Weinhuber else 1543eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 1544eb6e199bSStefan Weinhuber } else 1545eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 1546eb6e199bSStefan Weinhuber } 1547eb6e199bSStefan Weinhuber 15481da177e4SLinus Torvalds /* 15491da177e4SLinus Torvalds * This is the callback function for the init_analysis cqr. It saves 15501da177e4SLinus Torvalds * the status of the initial analysis ccw before it frees it and kicks 15511da177e4SLinus Torvalds * the device to continue the startup sequence. This will call 15521da177e4SLinus Torvalds * dasd_eckd_do_analysis again (if the devices has not been marked 15531da177e4SLinus Torvalds * for deletion in the meantime). 15541da177e4SLinus Torvalds */ 1555eb6e199bSStefan Weinhuber static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, 1556eb6e199bSStefan Weinhuber void *data) 15571da177e4SLinus Torvalds { 15581da177e4SLinus Torvalds struct dasd_eckd_private *private; 15591da177e4SLinus Torvalds struct dasd_device *device; 15601da177e4SLinus Torvalds 15618e09f215SStefan Weinhuber device = init_cqr->startdev; 15621da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 1563eb6e199bSStefan Weinhuber private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); 15641da177e4SLinus Torvalds dasd_sfree_request(init_cqr, device); 15651da177e4SLinus Torvalds dasd_kick_device(device); 15661da177e4SLinus Torvalds } 15671da177e4SLinus Torvalds 1568eb6e199bSStefan Weinhuber static int dasd_eckd_start_analysis(struct dasd_block *block) 15691da177e4SLinus Torvalds { 15701da177e4SLinus Torvalds struct dasd_eckd_private *private; 15711da177e4SLinus Torvalds struct dasd_ccw_req *init_cqr; 15721da177e4SLinus Torvalds 15738e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 15748e09f215SStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(block->base); 15751da177e4SLinus Torvalds if (IS_ERR(init_cqr)) 15761da177e4SLinus Torvalds return PTR_ERR(init_cqr); 15771da177e4SLinus Torvalds init_cqr->callback = dasd_eckd_analysis_callback; 15781da177e4SLinus Torvalds init_cqr->callback_data = NULL; 15791da177e4SLinus Torvalds init_cqr->expires = 5*HZ; 1580eb6e199bSStefan Weinhuber /* first try without ERP, so we can later handle unformatted 1581eb6e199bSStefan Weinhuber * devices as special case 1582eb6e199bSStefan Weinhuber */ 1583eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); 1584eb6e199bSStefan Weinhuber init_cqr->retries = 0; 15851da177e4SLinus Torvalds dasd_add_request_head(init_cqr); 15861da177e4SLinus Torvalds return -EAGAIN; 15871da177e4SLinus Torvalds } 15881da177e4SLinus Torvalds 1589eb6e199bSStefan Weinhuber static int dasd_eckd_end_analysis(struct dasd_block *block) 15901da177e4SLinus Torvalds { 15918e09f215SStefan Weinhuber struct dasd_device *device; 15921da177e4SLinus Torvalds struct dasd_eckd_private *private; 15931da177e4SLinus Torvalds struct eckd_count *count_area; 15941da177e4SLinus Torvalds unsigned int sb, blk_per_trk; 15951da177e4SLinus Torvalds int status, i; 1596eb6e199bSStefan Weinhuber struct dasd_ccw_req *init_cqr; 15971da177e4SLinus Torvalds 15988e09f215SStefan Weinhuber device = block->base; 15991da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 16001da177e4SLinus Torvalds status = private->init_cqr_status; 16011da177e4SLinus Torvalds private->init_cqr_status = -1; 1602eb6e199bSStefan Weinhuber if (status == INIT_CQR_ERROR) { 1603eb6e199bSStefan Weinhuber /* try again, this time with full ERP */ 1604eb6e199bSStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(device); 1605eb6e199bSStefan Weinhuber dasd_sleep_on(init_cqr); 1606eb6e199bSStefan Weinhuber status = dasd_eckd_analysis_evaluation(init_cqr); 1607eb6e199bSStefan Weinhuber dasd_sfree_request(init_cqr, device); 1608eb6e199bSStefan Weinhuber } 1609eb6e199bSStefan Weinhuber 1610eb6e199bSStefan Weinhuber if (status == INIT_CQR_UNFORMATTED) { 1611eb6e199bSStefan Weinhuber dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); 16121da177e4SLinus Torvalds return -EMEDIUMTYPE; 1613eb6e199bSStefan Weinhuber } else if (status == INIT_CQR_ERROR) { 1614eb6e199bSStefan Weinhuber dev_err(&device->cdev->dev, 1615eb6e199bSStefan Weinhuber "Detecting the DASD disk layout failed because " 1616eb6e199bSStefan Weinhuber "of an I/O error\n"); 1617eb6e199bSStefan Weinhuber return -EIO; 16181da177e4SLinus Torvalds } 16191da177e4SLinus Torvalds 16201da177e4SLinus Torvalds private->uses_cdl = 1; 16211da177e4SLinus Torvalds /* Check Track 0 for Compatible Disk Layout */ 16221da177e4SLinus Torvalds count_area = NULL; 16231da177e4SLinus Torvalds for (i = 0; i < 3; i++) { 16241da177e4SLinus Torvalds if (private->count_area[i].kl != 4 || 16251da177e4SLinus Torvalds private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4) { 16261da177e4SLinus Torvalds private->uses_cdl = 0; 16271da177e4SLinus Torvalds break; 16281da177e4SLinus Torvalds } 16291da177e4SLinus Torvalds } 16301da177e4SLinus Torvalds if (i == 3) 16311da177e4SLinus Torvalds count_area = &private->count_area[4]; 16321da177e4SLinus Torvalds 16331da177e4SLinus Torvalds if (private->uses_cdl == 0) { 16341da177e4SLinus Torvalds for (i = 0; i < 5; i++) { 16351da177e4SLinus Torvalds if ((private->count_area[i].kl != 0) || 16361da177e4SLinus Torvalds (private->count_area[i].dl != 16371da177e4SLinus Torvalds private->count_area[0].dl)) 16381da177e4SLinus Torvalds break; 16391da177e4SLinus Torvalds } 16401da177e4SLinus Torvalds if (i == 5) 16411da177e4SLinus Torvalds count_area = &private->count_area[0]; 16421da177e4SLinus Torvalds } else { 16431da177e4SLinus Torvalds if (private->count_area[3].record == 1) 1644fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1645fc19f381SStefan Haberland "Track 0 has no records following the VTOC\n"); 16461da177e4SLinus Torvalds } 16471da177e4SLinus Torvalds if (count_area != NULL && count_area->kl == 0) { 16481da177e4SLinus Torvalds /* we found notthing violating our disk layout */ 16491da177e4SLinus Torvalds if (dasd_check_blocksize(count_area->dl) == 0) 16508e09f215SStefan Weinhuber block->bp_block = count_area->dl; 16511da177e4SLinus Torvalds } 16528e09f215SStefan Weinhuber if (block->bp_block == 0) { 1653fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1654fc19f381SStefan Haberland "The disk layout of the DASD is not supported\n"); 16551da177e4SLinus Torvalds return -EMEDIUMTYPE; 16561da177e4SLinus Torvalds } 16578e09f215SStefan Weinhuber block->s2b_shift = 0; /* bits to shift 512 to get a block */ 16588e09f215SStefan Weinhuber for (sb = 512; sb < block->bp_block; sb = sb << 1) 16598e09f215SStefan Weinhuber block->s2b_shift++; 16601da177e4SLinus Torvalds 16618e09f215SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 1662b44b0ab3SStefan Weinhuber block->blocks = (private->real_cyl * 16631da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 16641da177e4SLinus Torvalds blk_per_trk); 16651da177e4SLinus Torvalds 1666fc19f381SStefan Haberland dev_info(&device->cdev->dev, 1667fc19f381SStefan Haberland "DASD with %d KB/block, %d KB total size, %d KB/track, " 1668fc19f381SStefan Haberland "%s\n", (block->bp_block >> 10), 1669b44b0ab3SStefan Weinhuber ((private->real_cyl * 16701da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 16718e09f215SStefan Weinhuber blk_per_trk * (block->bp_block >> 9)) >> 1), 16728e09f215SStefan Weinhuber ((blk_per_trk * block->bp_block) >> 10), 16731da177e4SLinus Torvalds private->uses_cdl ? 16741da177e4SLinus Torvalds "compatible disk layout" : "linux disk layout"); 16751da177e4SLinus Torvalds 16761da177e4SLinus Torvalds return 0; 16771da177e4SLinus Torvalds } 16781da177e4SLinus Torvalds 16798e09f215SStefan Weinhuber static int dasd_eckd_do_analysis(struct dasd_block *block) 16801da177e4SLinus Torvalds { 16811da177e4SLinus Torvalds struct dasd_eckd_private *private; 16821da177e4SLinus Torvalds 16838e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 16841da177e4SLinus Torvalds if (private->init_cqr_status < 0) 16858e09f215SStefan Weinhuber return dasd_eckd_start_analysis(block); 16861da177e4SLinus Torvalds else 16878e09f215SStefan Weinhuber return dasd_eckd_end_analysis(block); 16881da177e4SLinus Torvalds } 16891da177e4SLinus Torvalds 16908e09f215SStefan Weinhuber static int dasd_eckd_ready_to_online(struct dasd_device *device) 16918e09f215SStefan Weinhuber { 16928e09f215SStefan Weinhuber return dasd_alias_add_device(device); 16938e09f215SStefan Weinhuber }; 16948e09f215SStefan Weinhuber 16958e09f215SStefan Weinhuber static int dasd_eckd_online_to_ready(struct dasd_device *device) 16968e09f215SStefan Weinhuber { 1697501183f2SStefan Haberland cancel_work_sync(&device->reload_device); 16988e09f215SStefan Weinhuber return dasd_alias_remove_device(device); 16998e09f215SStefan Weinhuber }; 17008e09f215SStefan Weinhuber 17011da177e4SLinus Torvalds static int 17028e09f215SStefan Weinhuber dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 17031da177e4SLinus Torvalds { 17041da177e4SLinus Torvalds struct dasd_eckd_private *private; 17051da177e4SLinus Torvalds 17068e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) block->base->private; 17078e09f215SStefan Weinhuber if (dasd_check_blocksize(block->bp_block) == 0) { 17081da177e4SLinus Torvalds geo->sectors = recs_per_track(&private->rdc_data, 17098e09f215SStefan Weinhuber 0, block->bp_block); 17101da177e4SLinus Torvalds } 17111da177e4SLinus Torvalds geo->cylinders = private->rdc_data.no_cyl; 17121da177e4SLinus Torvalds geo->heads = private->rdc_data.trk_per_cyl; 17131da177e4SLinus Torvalds return 0; 17141da177e4SLinus Torvalds } 17151da177e4SLinus Torvalds 17161da177e4SLinus Torvalds static struct dasd_ccw_req * 17171da177e4SLinus Torvalds dasd_eckd_format_device(struct dasd_device * device, 17181da177e4SLinus Torvalds struct format_data_t * fdata) 17191da177e4SLinus Torvalds { 17201da177e4SLinus Torvalds struct dasd_eckd_private *private; 17211da177e4SLinus Torvalds struct dasd_ccw_req *fcp; 17221da177e4SLinus Torvalds struct eckd_count *ect; 17231da177e4SLinus Torvalds struct ccw1 *ccw; 17241da177e4SLinus Torvalds void *data; 1725b44b0ab3SStefan Weinhuber int rpt; 1726b44b0ab3SStefan Weinhuber struct ch_t address; 17271da177e4SLinus Torvalds int cplength, datasize; 17281da177e4SLinus Torvalds int i; 1729f9a28f7bSJean-Baptiste Joret int intensity = 0; 1730f9a28f7bSJean-Baptiste Joret int r0_perm; 17311da177e4SLinus Torvalds 17321da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 17331da177e4SLinus Torvalds rpt = recs_per_track(&private->rdc_data, 0, fdata->blksize); 1734b44b0ab3SStefan Weinhuber set_ch_t(&address, 1735b44b0ab3SStefan Weinhuber fdata->start_unit / private->rdc_data.trk_per_cyl, 1736b44b0ab3SStefan Weinhuber fdata->start_unit % private->rdc_data.trk_per_cyl); 17371da177e4SLinus Torvalds 17381da177e4SLinus Torvalds /* Sanity checks. */ 17391da177e4SLinus Torvalds if (fdata->start_unit >= 1740b44b0ab3SStefan Weinhuber (private->real_cyl * private->rdc_data.trk_per_cyl)) { 1741fc19f381SStefan Haberland dev_warn(&device->cdev->dev, "Start track number %d used in " 1742fc19f381SStefan Haberland "formatting is too big\n", fdata->start_unit); 17431da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 17441da177e4SLinus Torvalds } 17451da177e4SLinus Torvalds if (fdata->start_unit > fdata->stop_unit) { 1746fc19f381SStefan Haberland dev_warn(&device->cdev->dev, "Start track %d used in " 1747fc19f381SStefan Haberland "formatting exceeds end track\n", fdata->start_unit); 17481da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 17491da177e4SLinus Torvalds } 17501da177e4SLinus Torvalds if (dasd_check_blocksize(fdata->blksize) != 0) { 1751fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1752fc19f381SStefan Haberland "The DASD cannot be formatted with block size %d\n", 17531da177e4SLinus Torvalds fdata->blksize); 17541da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 17551da177e4SLinus Torvalds } 17561da177e4SLinus Torvalds 17571da177e4SLinus Torvalds /* 17581da177e4SLinus Torvalds * fdata->intensity is a bit string that tells us what to do: 17591da177e4SLinus Torvalds * Bit 0: write record zero 17601da177e4SLinus Torvalds * Bit 1: write home address, currently not supported 17611da177e4SLinus Torvalds * Bit 2: invalidate tracks 17621da177e4SLinus Torvalds * Bit 3: use OS/390 compatible disk layout (cdl) 1763f9a28f7bSJean-Baptiste Joret * Bit 4: do not allow storage subsystem to modify record zero 17641da177e4SLinus Torvalds * Only some bit combinations do make sense. 17651da177e4SLinus Torvalds */ 1766f9a28f7bSJean-Baptiste Joret if (fdata->intensity & 0x10) { 1767f9a28f7bSJean-Baptiste Joret r0_perm = 0; 1768f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity & ~0x10; 1769f9a28f7bSJean-Baptiste Joret } else { 1770f9a28f7bSJean-Baptiste Joret r0_perm = 1; 1771f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity; 1772f9a28f7bSJean-Baptiste Joret } 1773f9a28f7bSJean-Baptiste Joret switch (intensity) { 17741da177e4SLinus Torvalds case 0x00: /* Normal format */ 17751da177e4SLinus Torvalds case 0x08: /* Normal format, use cdl. */ 17761da177e4SLinus Torvalds cplength = 2 + rpt; 17771da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 17781da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 17791da177e4SLinus Torvalds rpt * sizeof(struct eckd_count); 17801da177e4SLinus Torvalds break; 17811da177e4SLinus Torvalds case 0x01: /* Write record zero and format track. */ 17821da177e4SLinus Torvalds case 0x09: /* Write record zero and format track, use cdl. */ 17831da177e4SLinus Torvalds cplength = 3 + rpt; 17841da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 17851da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 17861da177e4SLinus Torvalds sizeof(struct eckd_count) + 17871da177e4SLinus Torvalds rpt * sizeof(struct eckd_count); 17881da177e4SLinus Torvalds break; 17891da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 17901da177e4SLinus Torvalds case 0x0c: /* Invalidate track, use cdl. */ 17911da177e4SLinus Torvalds cplength = 3; 17921da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 17931da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 17941da177e4SLinus Torvalds sizeof(struct eckd_count); 17951da177e4SLinus Torvalds break; 17961da177e4SLinus Torvalds default: 1797fc19f381SStefan Haberland dev_warn(&device->cdev->dev, "An I/O control call used " 1798fc19f381SStefan Haberland "incorrect flags 0x%x\n", fdata->intensity); 17991da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 18001da177e4SLinus Torvalds } 18011da177e4SLinus Torvalds /* Allocate the format ccw request. */ 180268b781feSStefan Haberland fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device); 18031da177e4SLinus Torvalds if (IS_ERR(fcp)) 18041da177e4SLinus Torvalds return fcp; 18051da177e4SLinus Torvalds 18061da177e4SLinus Torvalds data = fcp->data; 18071da177e4SLinus Torvalds ccw = fcp->cpaddr; 18081da177e4SLinus Torvalds 1809f9a28f7bSJean-Baptiste Joret switch (intensity & ~0x08) { 18101da177e4SLinus Torvalds case 0x00: /* Normal format. */ 18111da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 18121da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 18131da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device); 1814f9a28f7bSJean-Baptiste Joret /* grant subsystem permission to format R0 */ 1815f9a28f7bSJean-Baptiste Joret if (r0_perm) 1816f9a28f7bSJean-Baptiste Joret ((struct DE_eckd_data *)data)->ga_extended |= 0x04; 18171da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 18181da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18191da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 18201da177e4SLinus Torvalds fdata->start_unit, 0, rpt, 18211da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device, 18221da177e4SLinus Torvalds fdata->blksize); 18231da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 18241da177e4SLinus Torvalds break; 18251da177e4SLinus Torvalds case 0x01: /* Write record zero + format track. */ 18261da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 18271da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 18281da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, 18291da177e4SLinus Torvalds device); 18301da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 18311da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18321da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 18331da177e4SLinus Torvalds fdata->start_unit, 0, rpt + 1, 18341da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, device, 18358e09f215SStefan Weinhuber device->block->bp_block); 18361da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 18371da177e4SLinus Torvalds break; 18381da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 18391da177e4SLinus Torvalds define_extent(ccw++, (struct DE_eckd_data *) data, 18401da177e4SLinus Torvalds fdata->start_unit, fdata->start_unit, 18411da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device); 18421da177e4SLinus Torvalds data += sizeof(struct DE_eckd_data); 18431da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18441da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 18451da177e4SLinus Torvalds fdata->start_unit, 0, 1, 18461da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_CKD, device, 8); 18471da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 18481da177e4SLinus Torvalds break; 18491da177e4SLinus Torvalds } 1850f9a28f7bSJean-Baptiste Joret if (intensity & 0x01) { /* write record zero */ 18511da177e4SLinus Torvalds ect = (struct eckd_count *) data; 18521da177e4SLinus Torvalds data += sizeof(struct eckd_count); 1853b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 1854b44b0ab3SStefan Weinhuber ect->head = address.head; 18551da177e4SLinus Torvalds ect->record = 0; 18561da177e4SLinus Torvalds ect->kl = 0; 18571da177e4SLinus Torvalds ect->dl = 8; 18581da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18591da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 18601da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 18611da177e4SLinus Torvalds ccw->count = 8; 18621da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 18631da177e4SLinus Torvalds ccw++; 18641da177e4SLinus Torvalds } 1865f9a28f7bSJean-Baptiste Joret if ((intensity & ~0x08) & 0x04) { /* erase track */ 18661da177e4SLinus Torvalds ect = (struct eckd_count *) data; 18671da177e4SLinus Torvalds data += sizeof(struct eckd_count); 1868b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 1869b44b0ab3SStefan Weinhuber ect->head = address.head; 18701da177e4SLinus Torvalds ect->record = 1; 18711da177e4SLinus Torvalds ect->kl = 0; 18721da177e4SLinus Torvalds ect->dl = 0; 18731da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18741da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 18751da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 18761da177e4SLinus Torvalds ccw->count = 8; 18771da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 18781da177e4SLinus Torvalds } else { /* write remaining records */ 18791da177e4SLinus Torvalds for (i = 0; i < rpt; i++) { 18801da177e4SLinus Torvalds ect = (struct eckd_count *) data; 18811da177e4SLinus Torvalds data += sizeof(struct eckd_count); 1882b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 1883b44b0ab3SStefan Weinhuber ect->head = address.head; 18841da177e4SLinus Torvalds ect->record = i + 1; 18851da177e4SLinus Torvalds ect->kl = 0; 18861da177e4SLinus Torvalds ect->dl = fdata->blksize; 18871da177e4SLinus Torvalds /* Check for special tracks 0-1 when formatting CDL */ 1888f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 18891da177e4SLinus Torvalds fdata->start_unit == 0) { 18901da177e4SLinus Torvalds if (i < 3) { 18911da177e4SLinus Torvalds ect->kl = 4; 18921da177e4SLinus Torvalds ect->dl = sizes_trk0[i] - 4; 18931da177e4SLinus Torvalds } 18941da177e4SLinus Torvalds } 1895f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 18961da177e4SLinus Torvalds fdata->start_unit == 1) { 18971da177e4SLinus Torvalds ect->kl = 44; 18981da177e4SLinus Torvalds ect->dl = LABEL_SIZE - 44; 18991da177e4SLinus Torvalds } 19001da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 19011da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 19021da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 19031da177e4SLinus Torvalds ccw->count = 8; 19041da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 19051da177e4SLinus Torvalds ccw++; 19061da177e4SLinus Torvalds } 19071da177e4SLinus Torvalds } 19088e09f215SStefan Weinhuber fcp->startdev = device; 19098e09f215SStefan Weinhuber fcp->memdev = device; 1910eb6e199bSStefan Weinhuber fcp->retries = 256; 19111da177e4SLinus Torvalds fcp->buildclk = get_clock(); 19121da177e4SLinus Torvalds fcp->status = DASD_CQR_FILLED; 19131da177e4SLinus Torvalds return fcp; 19141da177e4SLinus Torvalds } 19151da177e4SLinus Torvalds 19168e09f215SStefan Weinhuber static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 19171da177e4SLinus Torvalds { 19188e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 19198e09f215SStefan Weinhuber if (cqr->block && (cqr->startdev != cqr->block->base)) { 19208e09f215SStefan Weinhuber dasd_eckd_reset_ccw_to_base_io(cqr); 19218e09f215SStefan Weinhuber cqr->startdev = cqr->block->base; 1922a4d26c6aSStefan Weinhuber cqr->lpm = cqr->block->base->path_data.opm; 19231da177e4SLinus Torvalds } 19248e09f215SStefan Weinhuber }; 19251da177e4SLinus Torvalds 19261da177e4SLinus Torvalds static dasd_erp_fn_t 19271da177e4SLinus Torvalds dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 19281da177e4SLinus Torvalds { 19298e09f215SStefan Weinhuber struct dasd_device *device = (struct dasd_device *) cqr->startdev; 19301da177e4SLinus Torvalds struct ccw_device *cdev = device->cdev; 19311da177e4SLinus Torvalds 19321da177e4SLinus Torvalds switch (cdev->id.cu_type) { 19331da177e4SLinus Torvalds case 0x3990: 19341da177e4SLinus Torvalds case 0x2105: 19351da177e4SLinus Torvalds case 0x2107: 19361da177e4SLinus Torvalds case 0x1750: 19371da177e4SLinus Torvalds return dasd_3990_erp_action; 19381da177e4SLinus Torvalds case 0x9343: 19391da177e4SLinus Torvalds case 0x3880: 19401da177e4SLinus Torvalds default: 19411da177e4SLinus Torvalds return dasd_default_erp_action; 19421da177e4SLinus Torvalds } 19431da177e4SLinus Torvalds } 19441da177e4SLinus Torvalds 19451da177e4SLinus Torvalds static dasd_erp_fn_t 19461da177e4SLinus Torvalds dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 19471da177e4SLinus Torvalds { 19481da177e4SLinus Torvalds return dasd_default_erp_postaction; 19491da177e4SLinus Torvalds } 19501da177e4SLinus Torvalds 19515a27e60dSStefan Weinhuber static void dasd_eckd_check_for_device_change(struct dasd_device *device, 19525a27e60dSStefan Weinhuber struct dasd_ccw_req *cqr, 19538e09f215SStefan Weinhuber struct irb *irb) 19548e09f215SStefan Weinhuber { 19558e09f215SStefan Weinhuber char mask; 1956f3eb5384SStefan Weinhuber char *sense = NULL; 1957501183f2SStefan Haberland struct dasd_eckd_private *private; 19588e09f215SStefan Weinhuber 1959501183f2SStefan Haberland private = (struct dasd_eckd_private *) device->private; 19608e09f215SStefan Weinhuber /* first of all check for state change pending interrupt */ 19618e09f215SStefan Weinhuber mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 1962f3eb5384SStefan Weinhuber if ((scsw_dstat(&irb->scsw) & mask) == mask) { 1963501183f2SStefan Haberland /* for alias only and not in offline processing*/ 1964501183f2SStefan Haberland if (!device->block && private->lcu && 1965501183f2SStefan Haberland !test_bit(DASD_FLAG_OFFLINE, &device->flags)) { 1966501183f2SStefan Haberland /* 1967501183f2SStefan Haberland * the state change could be caused by an alias 1968501183f2SStefan Haberland * reassignment remove device from alias handling 1969501183f2SStefan Haberland * to prevent new requests from being scheduled on 1970501183f2SStefan Haberland * the wrong alias device 1971501183f2SStefan Haberland */ 1972501183f2SStefan Haberland dasd_alias_remove_device(device); 1973501183f2SStefan Haberland 1974501183f2SStefan Haberland /* schedule worker to reload device */ 1975501183f2SStefan Haberland dasd_reload_device(device); 1976501183f2SStefan Haberland } 19778e09f215SStefan Weinhuber dasd_generic_handle_state_change(device); 19788e09f215SStefan Weinhuber return; 19798e09f215SStefan Weinhuber } 19808e09f215SStefan Weinhuber 1981a5a0061fSStefan Weinhuber sense = dasd_get_sense(irb); 19825a27e60dSStefan Weinhuber if (!sense) 19835a27e60dSStefan Weinhuber return; 19845a27e60dSStefan Weinhuber 19855a27e60dSStefan Weinhuber /* summary unit check */ 19865a27e60dSStefan Weinhuber if ((sense[7] == 0x0D) && 1987a5a0061fSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { 19888e09f215SStefan Weinhuber dasd_alias_handle_summary_unit_check(device, irb); 19898e09f215SStefan Weinhuber return; 19908e09f215SStefan Weinhuber } 19918e09f215SStefan Weinhuber 1992f60c768cSStefan Haberland /* service information message SIM */ 19935a27e60dSStefan Weinhuber if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && 1994f3eb5384SStefan Weinhuber ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 1995f3eb5384SStefan Weinhuber dasd_3990_erp_handle_sim(device, sense); 1996f60c768cSStefan Haberland return; 1997f60c768cSStefan Haberland } 1998f60c768cSStefan Haberland 19995a27e60dSStefan Weinhuber /* loss of device reservation is handled via base devices only 20005a27e60dSStefan Weinhuber * as alias devices may be used with several bases 20015a27e60dSStefan Weinhuber */ 20025a27e60dSStefan Weinhuber if (device->block && (sense[7] == 0x3F) && 20035a27e60dSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && 20045a27e60dSStefan Weinhuber test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { 20055a27e60dSStefan Weinhuber if (device->features & DASD_FEATURE_FAILONSLCK) 20065a27e60dSStefan Weinhuber set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); 20075a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 20085a27e60dSStefan Weinhuber dev_err(&device->cdev->dev, 20095a27e60dSStefan Weinhuber "The device reservation was lost\n"); 2010ada3df91SStefan Haberland } 20115a27e60dSStefan Weinhuber } 2012f3eb5384SStefan Weinhuber 2013f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( 2014f3eb5384SStefan Weinhuber struct dasd_device *startdev, 20158e09f215SStefan Weinhuber struct dasd_block *block, 2016f3eb5384SStefan Weinhuber struct request *req, 2017f3eb5384SStefan Weinhuber sector_t first_rec, 2018f3eb5384SStefan Weinhuber sector_t last_rec, 2019f3eb5384SStefan Weinhuber sector_t first_trk, 2020f3eb5384SStefan Weinhuber sector_t last_trk, 2021f3eb5384SStefan Weinhuber unsigned int first_offs, 2022f3eb5384SStefan Weinhuber unsigned int last_offs, 2023f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 2024f3eb5384SStefan Weinhuber unsigned int blksize) 20251da177e4SLinus Torvalds { 20261da177e4SLinus Torvalds struct dasd_eckd_private *private; 20271da177e4SLinus Torvalds unsigned long *idaws; 20281da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 20291da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 20301da177e4SLinus Torvalds struct ccw1 *ccw; 20315705f702SNeilBrown struct req_iterator iter; 20321da177e4SLinus Torvalds struct bio_vec *bv; 20331da177e4SLinus Torvalds char *dst; 2034f3eb5384SStefan Weinhuber unsigned int off; 20351da177e4SLinus Torvalds int count, cidaw, cplength, datasize; 2036f3eb5384SStefan Weinhuber sector_t recid; 20371da177e4SLinus Torvalds unsigned char cmd, rcmd; 20388e09f215SStefan Weinhuber int use_prefix; 20398e09f215SStefan Weinhuber struct dasd_device *basedev; 20401da177e4SLinus Torvalds 20418e09f215SStefan Weinhuber basedev = block->base; 20428e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 20431da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 20441da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_READ_MT; 20451da177e4SLinus Torvalds else if (rq_data_dir(req) == WRITE) 20461da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_WRITE_MT; 20471da177e4SLinus Torvalds else 20481da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 2049f3eb5384SStefan Weinhuber 20501da177e4SLinus Torvalds /* Check struct bio and count the number of blocks for the request. */ 20511da177e4SLinus Torvalds count = 0; 20521da177e4SLinus Torvalds cidaw = 0; 20535705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 20541da177e4SLinus Torvalds if (bv->bv_len & (blksize - 1)) 20551da177e4SLinus Torvalds /* Eckd can only do full blocks. */ 20561da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 20578e09f215SStefan Weinhuber count += bv->bv_len >> (block->s2b_shift + 9); 2058347a8dc3SMartin Schwidefsky #if defined(CONFIG_64BIT) 20596c92e699SJens Axboe if (idal_is_needed (page_address(bv->bv_page), bv->bv_len)) 20608e09f215SStefan Weinhuber cidaw += bv->bv_len >> (block->s2b_shift + 9); 20611da177e4SLinus Torvalds #endif 20621da177e4SLinus Torvalds } 20631da177e4SLinus Torvalds /* Paranoia. */ 20641da177e4SLinus Torvalds if (count != last_rec - first_rec + 1) 20651da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 20668e09f215SStefan Weinhuber 20678e09f215SStefan Weinhuber /* use the prefix command if available */ 20688e09f215SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 20698e09f215SStefan Weinhuber if (use_prefix) { 20708e09f215SStefan Weinhuber /* 1x prefix + number of blocks */ 20718e09f215SStefan Weinhuber cplength = 2 + count; 20728e09f215SStefan Weinhuber /* 1x prefix + cidaws*sizeof(long) */ 20738e09f215SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 20748e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 20758e09f215SStefan Weinhuber cidaw * sizeof(unsigned long); 20768e09f215SStefan Weinhuber } else { 20771da177e4SLinus Torvalds /* 1x define extent + 1x locate record + number of blocks */ 20781da177e4SLinus Torvalds cplength = 2 + count; 20791da177e4SLinus Torvalds /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 20808e09f215SStefan Weinhuber datasize = sizeof(struct DE_eckd_data) + 20818e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 20821da177e4SLinus Torvalds cidaw * sizeof(unsigned long); 20838e09f215SStefan Weinhuber } 20841da177e4SLinus Torvalds /* Find out the number of additional locate record ccws for cdl. */ 20851da177e4SLinus Torvalds if (private->uses_cdl && first_rec < 2*blk_per_trk) { 20861da177e4SLinus Torvalds if (last_rec >= 2*blk_per_trk) 20871da177e4SLinus Torvalds count = 2*blk_per_trk - first_rec; 20881da177e4SLinus Torvalds cplength += count; 20891da177e4SLinus Torvalds datasize += count*sizeof(struct LO_eckd_data); 20901da177e4SLinus Torvalds } 20911da177e4SLinus Torvalds /* Allocate the ccw request. */ 209268b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 209368b781feSStefan Haberland startdev); 20941da177e4SLinus Torvalds if (IS_ERR(cqr)) 20951da177e4SLinus Torvalds return cqr; 20961da177e4SLinus Torvalds ccw = cqr->cpaddr; 20978e09f215SStefan Weinhuber /* First ccw is define extent or prefix. */ 20988e09f215SStefan Weinhuber if (use_prefix) { 20998e09f215SStefan Weinhuber if (prefix(ccw++, cqr->data, first_trk, 21008e09f215SStefan Weinhuber last_trk, cmd, basedev, startdev) == -EAGAIN) { 21018e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 21028e09f215SStefan Weinhuber * Try again later. 21038e09f215SStefan Weinhuber */ 21048e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2105d54853efSMartin Schwidefsky return ERR_PTR(-EAGAIN); 2106d54853efSMartin Schwidefsky } 21078e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 21088e09f215SStefan Weinhuber sizeof(struct PFX_eckd_data)); 21098e09f215SStefan Weinhuber } else { 21108e09f215SStefan Weinhuber if (define_extent(ccw++, cqr->data, first_trk, 21118e09f215SStefan Weinhuber last_trk, cmd, startdev) == -EAGAIN) { 21128e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 21138e09f215SStefan Weinhuber * Try again later. 21148e09f215SStefan Weinhuber */ 21158e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 21168e09f215SStefan Weinhuber return ERR_PTR(-EAGAIN); 21178e09f215SStefan Weinhuber } 21188e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 21198e09f215SStefan Weinhuber sizeof(struct DE_eckd_data)); 21208e09f215SStefan Weinhuber } 21211da177e4SLinus Torvalds /* Build locate_record+read/write/ccws. */ 21221da177e4SLinus Torvalds LO_data = (struct LO_eckd_data *) (idaws + cidaw); 21231da177e4SLinus Torvalds recid = first_rec; 21241da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 21251da177e4SLinus Torvalds /* Only standard blocks so there is just one locate record. */ 21261da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 21271da177e4SLinus Torvalds locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 21288e09f215SStefan Weinhuber last_rec - recid + 1, cmd, basedev, blksize); 21291da177e4SLinus Torvalds } 21305705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 21311da177e4SLinus Torvalds dst = page_address(bv->bv_page) + bv->bv_offset; 21321da177e4SLinus Torvalds if (dasd_page_cache) { 21331da177e4SLinus Torvalds char *copy = kmem_cache_alloc(dasd_page_cache, 2134441e143eSChristoph Lameter GFP_DMA | __GFP_NOWARN); 21351da177e4SLinus Torvalds if (copy && rq_data_dir(req) == WRITE) 21361da177e4SLinus Torvalds memcpy(copy + bv->bv_offset, dst, bv->bv_len); 21371da177e4SLinus Torvalds if (copy) 21381da177e4SLinus Torvalds dst = copy + bv->bv_offset; 21391da177e4SLinus Torvalds } 21401da177e4SLinus Torvalds for (off = 0; off < bv->bv_len; off += blksize) { 21411da177e4SLinus Torvalds sector_t trkid = recid; 21421da177e4SLinus Torvalds unsigned int recoffs = sector_div(trkid, blk_per_trk); 21431da177e4SLinus Torvalds rcmd = cmd; 21441da177e4SLinus Torvalds count = blksize; 21451da177e4SLinus Torvalds /* Locate record for cdl special block ? */ 21461da177e4SLinus Torvalds if (private->uses_cdl && recid < 2*blk_per_trk) { 21471da177e4SLinus Torvalds if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 21481da177e4SLinus Torvalds rcmd |= 0x8; 21491da177e4SLinus Torvalds count = dasd_eckd_cdl_reclen(recid); 2150ec5883abSHorst Hummel if (count < blksize && 2151ec5883abSHorst Hummel rq_data_dir(req) == READ) 21521da177e4SLinus Torvalds memset(dst + count, 0xe5, 21531da177e4SLinus Torvalds blksize - count); 21541da177e4SLinus Torvalds } 21551da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 21561da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 21571da177e4SLinus Torvalds trkid, recoffs + 1, 21588e09f215SStefan Weinhuber 1, rcmd, basedev, count); 21591da177e4SLinus Torvalds } 21601da177e4SLinus Torvalds /* Locate record for standard blocks ? */ 21611da177e4SLinus Torvalds if (private->uses_cdl && recid == 2*blk_per_trk) { 21621da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 21631da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 21641da177e4SLinus Torvalds trkid, recoffs + 1, 21651da177e4SLinus Torvalds last_rec - recid + 1, 21668e09f215SStefan Weinhuber cmd, basedev, count); 21671da177e4SLinus Torvalds } 21681da177e4SLinus Torvalds /* Read/write ccw. */ 21691da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 21701da177e4SLinus Torvalds ccw->cmd_code = rcmd; 21711da177e4SLinus Torvalds ccw->count = count; 21721da177e4SLinus Torvalds if (idal_is_needed(dst, blksize)) { 21731da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) idaws; 21741da177e4SLinus Torvalds ccw->flags = CCW_FLAG_IDA; 21751da177e4SLinus Torvalds idaws = idal_create_words(idaws, dst, blksize); 21761da177e4SLinus Torvalds } else { 21771da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) dst; 21781da177e4SLinus Torvalds ccw->flags = 0; 21791da177e4SLinus Torvalds } 21801da177e4SLinus Torvalds ccw++; 21811da177e4SLinus Torvalds dst += blksize; 21821da177e4SLinus Torvalds recid++; 21831da177e4SLinus Torvalds } 21841da177e4SLinus Torvalds } 218513de227bSHolger Smolinski if (blk_noretry_request(req) || 218613de227bSHolger Smolinski block->base->features & DASD_FEATURE_FAILFAST) 21871c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 21888e09f215SStefan Weinhuber cqr->startdev = startdev; 21898e09f215SStefan Weinhuber cqr->memdev = startdev; 21908e09f215SStefan Weinhuber cqr->block = block; 21917c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2192a4d26c6aSStefan Weinhuber cqr->lpm = startdev->path_data.ppm; 21931da177e4SLinus Torvalds cqr->retries = 256; 21941da177e4SLinus Torvalds cqr->buildclk = get_clock(); 21951da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 21961da177e4SLinus Torvalds return cqr; 21971da177e4SLinus Torvalds } 21981da177e4SLinus Torvalds 2199f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 2200f3eb5384SStefan Weinhuber struct dasd_device *startdev, 2201f3eb5384SStefan Weinhuber struct dasd_block *block, 2202f3eb5384SStefan Weinhuber struct request *req, 2203f3eb5384SStefan Weinhuber sector_t first_rec, 2204f3eb5384SStefan Weinhuber sector_t last_rec, 2205f3eb5384SStefan Weinhuber sector_t first_trk, 2206f3eb5384SStefan Weinhuber sector_t last_trk, 2207f3eb5384SStefan Weinhuber unsigned int first_offs, 2208f3eb5384SStefan Weinhuber unsigned int last_offs, 2209f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 2210f3eb5384SStefan Weinhuber unsigned int blksize) 2211f3eb5384SStefan Weinhuber { 2212f3eb5384SStefan Weinhuber struct dasd_eckd_private *private; 2213f3eb5384SStefan Weinhuber unsigned long *idaws; 2214f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 2215f3eb5384SStefan Weinhuber struct ccw1 *ccw; 2216f3eb5384SStefan Weinhuber struct req_iterator iter; 2217f3eb5384SStefan Weinhuber struct bio_vec *bv; 2218f3eb5384SStefan Weinhuber char *dst, *idaw_dst; 2219f3eb5384SStefan Weinhuber unsigned int cidaw, cplength, datasize; 2220f3eb5384SStefan Weinhuber unsigned int tlf; 2221f3eb5384SStefan Weinhuber sector_t recid; 2222f3eb5384SStefan Weinhuber unsigned char cmd; 2223f3eb5384SStefan Weinhuber struct dasd_device *basedev; 2224f3eb5384SStefan Weinhuber unsigned int trkcount, count, count_to_trk_end; 2225f3eb5384SStefan Weinhuber unsigned int idaw_len, seg_len, part_len, len_to_track_end; 2226f3eb5384SStefan Weinhuber unsigned char new_track, end_idaw; 2227f3eb5384SStefan Weinhuber sector_t trkid; 2228f3eb5384SStefan Weinhuber unsigned int recoffs; 2229f3eb5384SStefan Weinhuber 2230f3eb5384SStefan Weinhuber basedev = block->base; 2231f3eb5384SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 2232f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) 2233f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 2234f3eb5384SStefan Weinhuber else if (rq_data_dir(req) == WRITE) 2235f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 2236f3eb5384SStefan Weinhuber else 2237f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 2238f3eb5384SStefan Weinhuber 2239f3eb5384SStefan Weinhuber /* Track based I/O needs IDAWs for each page, and not just for 2240f3eb5384SStefan Weinhuber * 64 bit addresses. We need additional idals for pages 2241f3eb5384SStefan Weinhuber * that get filled from two tracks, so we use the number 2242f3eb5384SStefan Weinhuber * of records as upper limit. 2243f3eb5384SStefan Weinhuber */ 2244f3eb5384SStefan Weinhuber cidaw = last_rec - first_rec + 1; 2245f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 2246f3eb5384SStefan Weinhuber 2247f3eb5384SStefan Weinhuber /* 1x prefix + one read/write ccw per track */ 2248f3eb5384SStefan Weinhuber cplength = 1 + trkcount; 2249f3eb5384SStefan Weinhuber 2250f3eb5384SStefan Weinhuber /* on 31-bit we need space for two 32 bit addresses per page 2251f3eb5384SStefan Weinhuber * on 64-bit one 64 bit address 2252f3eb5384SStefan Weinhuber */ 2253f3eb5384SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 2254f3eb5384SStefan Weinhuber cidaw * sizeof(unsigned long long); 2255f3eb5384SStefan Weinhuber 2256f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 225768b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 225868b781feSStefan Haberland startdev); 2259f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 2260f3eb5384SStefan Weinhuber return cqr; 2261f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 2262f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 2263f3eb5384SStefan Weinhuber if (first_trk == last_trk) 2264f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 2265f3eb5384SStefan Weinhuber else 2266f3eb5384SStefan Weinhuber tlf = last_offs + 1; 2267f3eb5384SStefan Weinhuber tlf *= blksize; 2268f3eb5384SStefan Weinhuber 2269f3eb5384SStefan Weinhuber if (prefix_LRE(ccw++, cqr->data, first_trk, 2270f3eb5384SStefan Weinhuber last_trk, cmd, basedev, startdev, 2271f3eb5384SStefan Weinhuber 1 /* format */, first_offs + 1, 2272f3eb5384SStefan Weinhuber trkcount, blksize, 2273f3eb5384SStefan Weinhuber tlf) == -EAGAIN) { 2274f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 2275f3eb5384SStefan Weinhuber * Try again later. 2276f3eb5384SStefan Weinhuber */ 2277f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2278f3eb5384SStefan Weinhuber return ERR_PTR(-EAGAIN); 2279f3eb5384SStefan Weinhuber } 2280f3eb5384SStefan Weinhuber 2281f3eb5384SStefan Weinhuber /* 2282f3eb5384SStefan Weinhuber * The translation of request into ccw programs must meet the 2283f3eb5384SStefan Weinhuber * following conditions: 2284f3eb5384SStefan Weinhuber * - all idaws but the first and the last must address full pages 2285f3eb5384SStefan Weinhuber * (or 2K blocks on 31-bit) 2286f3eb5384SStefan Weinhuber * - the scope of a ccw and it's idal ends with the track boundaries 2287f3eb5384SStefan Weinhuber */ 2288f3eb5384SStefan Weinhuber idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); 2289f3eb5384SStefan Weinhuber recid = first_rec; 2290f3eb5384SStefan Weinhuber new_track = 1; 2291f3eb5384SStefan Weinhuber end_idaw = 0; 2292f3eb5384SStefan Weinhuber len_to_track_end = 0; 2293f3eb5384SStefan Weinhuber idaw_dst = 0; 2294f3eb5384SStefan Weinhuber idaw_len = 0; 2295f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 2296f3eb5384SStefan Weinhuber dst = page_address(bv->bv_page) + bv->bv_offset; 2297f3eb5384SStefan Weinhuber seg_len = bv->bv_len; 2298f3eb5384SStefan Weinhuber while (seg_len) { 2299f3eb5384SStefan Weinhuber if (new_track) { 2300f3eb5384SStefan Weinhuber trkid = recid; 2301f3eb5384SStefan Weinhuber recoffs = sector_div(trkid, blk_per_trk); 2302f3eb5384SStefan Weinhuber count_to_trk_end = blk_per_trk - recoffs; 2303f3eb5384SStefan Weinhuber count = min((last_rec - recid + 1), 2304f3eb5384SStefan Weinhuber (sector_t)count_to_trk_end); 2305f3eb5384SStefan Weinhuber len_to_track_end = count * blksize; 2306f3eb5384SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 2307f3eb5384SStefan Weinhuber ccw->cmd_code = cmd; 2308f3eb5384SStefan Weinhuber ccw->count = len_to_track_end; 2309f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 2310f3eb5384SStefan Weinhuber ccw->flags = CCW_FLAG_IDA; 2311f3eb5384SStefan Weinhuber ccw++; 2312f3eb5384SStefan Weinhuber recid += count; 2313f3eb5384SStefan Weinhuber new_track = 0; 231452db45c3SStefan Weinhuber /* first idaw for a ccw may start anywhere */ 231552db45c3SStefan Weinhuber if (!idaw_dst) 231652db45c3SStefan Weinhuber idaw_dst = dst; 2317f3eb5384SStefan Weinhuber } 231852db45c3SStefan Weinhuber /* If we start a new idaw, we must make sure that it 231952db45c3SStefan Weinhuber * starts on an IDA_BLOCK_SIZE boundary. 2320f3eb5384SStefan Weinhuber * If we continue an idaw, we must make sure that the 2321f3eb5384SStefan Weinhuber * current segment begins where the so far accumulated 2322f3eb5384SStefan Weinhuber * idaw ends 2323f3eb5384SStefan Weinhuber */ 232452db45c3SStefan Weinhuber if (!idaw_dst) { 232552db45c3SStefan Weinhuber if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { 232652db45c3SStefan Weinhuber dasd_sfree_request(cqr, startdev); 232752db45c3SStefan Weinhuber return ERR_PTR(-ERANGE); 232852db45c3SStefan Weinhuber } else 2329f3eb5384SStefan Weinhuber idaw_dst = dst; 233052db45c3SStefan Weinhuber } 2331f3eb5384SStefan Weinhuber if ((idaw_dst + idaw_len) != dst) { 2332f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2333f3eb5384SStefan Weinhuber return ERR_PTR(-ERANGE); 2334f3eb5384SStefan Weinhuber } 2335f3eb5384SStefan Weinhuber part_len = min(seg_len, len_to_track_end); 2336f3eb5384SStefan Weinhuber seg_len -= part_len; 2337f3eb5384SStefan Weinhuber dst += part_len; 2338f3eb5384SStefan Weinhuber idaw_len += part_len; 2339f3eb5384SStefan Weinhuber len_to_track_end -= part_len; 2340f3eb5384SStefan Weinhuber /* collected memory area ends on an IDA_BLOCK border, 2341f3eb5384SStefan Weinhuber * -> create an idaw 2342f3eb5384SStefan Weinhuber * idal_create_words will handle cases where idaw_len 2343f3eb5384SStefan Weinhuber * is larger then IDA_BLOCK_SIZE 2344f3eb5384SStefan Weinhuber */ 2345f3eb5384SStefan Weinhuber if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) 2346f3eb5384SStefan Weinhuber end_idaw = 1; 2347f3eb5384SStefan Weinhuber /* We also need to end the idaw at track end */ 2348f3eb5384SStefan Weinhuber if (!len_to_track_end) { 2349f3eb5384SStefan Weinhuber new_track = 1; 2350f3eb5384SStefan Weinhuber end_idaw = 1; 2351f3eb5384SStefan Weinhuber } 2352f3eb5384SStefan Weinhuber if (end_idaw) { 2353f3eb5384SStefan Weinhuber idaws = idal_create_words(idaws, idaw_dst, 2354f3eb5384SStefan Weinhuber idaw_len); 2355f3eb5384SStefan Weinhuber idaw_dst = 0; 2356f3eb5384SStefan Weinhuber idaw_len = 0; 2357f3eb5384SStefan Weinhuber end_idaw = 0; 2358f3eb5384SStefan Weinhuber } 2359f3eb5384SStefan Weinhuber } 2360f3eb5384SStefan Weinhuber } 2361f3eb5384SStefan Weinhuber 2362f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 2363f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 2364f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2365f3eb5384SStefan Weinhuber cqr->startdev = startdev; 2366f3eb5384SStefan Weinhuber cqr->memdev = startdev; 2367f3eb5384SStefan Weinhuber cqr->block = block; 23687c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2369a4d26c6aSStefan Weinhuber cqr->lpm = startdev->path_data.ppm; 2370f3eb5384SStefan Weinhuber cqr->retries = 256; 2371f3eb5384SStefan Weinhuber cqr->buildclk = get_clock(); 2372f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 2373f3eb5384SStefan Weinhuber return cqr; 2374f3eb5384SStefan Weinhuber } 2375f3eb5384SStefan Weinhuber 2376f3eb5384SStefan Weinhuber static int prepare_itcw(struct itcw *itcw, 2377f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 2378f3eb5384SStefan Weinhuber struct dasd_device *basedev, 2379f3eb5384SStefan Weinhuber struct dasd_device *startdev, 2380f3eb5384SStefan Weinhuber unsigned int rec_on_trk, int count, 2381f3eb5384SStefan Weinhuber unsigned int blksize, 2382f3eb5384SStefan Weinhuber unsigned int total_data_size, 2383f3eb5384SStefan Weinhuber unsigned int tlf, 2384f3eb5384SStefan Weinhuber unsigned int blk_per_trk) 2385f3eb5384SStefan Weinhuber { 2386f3eb5384SStefan Weinhuber struct PFX_eckd_data pfxdata; 2387f3eb5384SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 2388f3eb5384SStefan Weinhuber struct DE_eckd_data *dedata; 2389f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 2390f3eb5384SStefan Weinhuber struct dcw *dcw; 2391f3eb5384SStefan Weinhuber 2392f3eb5384SStefan Weinhuber u32 begcyl, endcyl; 2393f3eb5384SStefan Weinhuber u16 heads, beghead, endhead; 2394f3eb5384SStefan Weinhuber u8 pfx_cmd; 2395f3eb5384SStefan Weinhuber 2396f3eb5384SStefan Weinhuber int rc = 0; 2397f3eb5384SStefan Weinhuber int sector = 0; 2398f3eb5384SStefan Weinhuber int dn, d; 2399f3eb5384SStefan Weinhuber 2400f3eb5384SStefan Weinhuber 2401f3eb5384SStefan Weinhuber /* setup prefix data */ 2402f3eb5384SStefan Weinhuber basepriv = (struct dasd_eckd_private *) basedev->private; 2403f3eb5384SStefan Weinhuber startpriv = (struct dasd_eckd_private *) startdev->private; 2404f3eb5384SStefan Weinhuber dedata = &pfxdata.define_extent; 2405f3eb5384SStefan Weinhuber lredata = &pfxdata.locate_record; 2406f3eb5384SStefan Weinhuber 2407f3eb5384SStefan Weinhuber memset(&pfxdata, 0, sizeof(pfxdata)); 2408f3eb5384SStefan Weinhuber pfxdata.format = 1; /* PFX with LRE */ 2409f3eb5384SStefan Weinhuber pfxdata.base_address = basepriv->ned->unit_addr; 2410f3eb5384SStefan Weinhuber pfxdata.base_lss = basepriv->ned->ID; 2411f3eb5384SStefan Weinhuber pfxdata.validity.define_extent = 1; 2412f3eb5384SStefan Weinhuber 2413f3eb5384SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 2414f3eb5384SStefan Weinhuber if (startpriv->uid.type != UA_BASE_DEVICE) { 2415f3eb5384SStefan Weinhuber pfxdata.validity.verify_base = 1; 2416f3eb5384SStefan Weinhuber if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) 2417f3eb5384SStefan Weinhuber pfxdata.validity.hyper_pav = 1; 2418f3eb5384SStefan Weinhuber } 2419f3eb5384SStefan Weinhuber 2420f3eb5384SStefan Weinhuber switch (cmd) { 2421f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 2422f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 2423f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 2424f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 2425f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 2426f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 2427f3eb5384SStefan Weinhuber lredata->operation.operation = 0x0C; 2428f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x01; 2429f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX_READ; 2430f3eb5384SStefan Weinhuber break; 2431f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 2432f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 2433f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 2434f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 2435f3eb5384SStefan Weinhuber rc = check_XRC_on_prefix(&pfxdata, basedev); 2436f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 2437f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 2438f3eb5384SStefan Weinhuber lredata->operation.operation = 0x3F; 2439f3eb5384SStefan Weinhuber lredata->extended_operation = 0x23; 2440f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x2; 2441f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX; 2442f3eb5384SStefan Weinhuber break; 2443f3eb5384SStefan Weinhuber default: 2444f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 2445f3eb5384SStefan Weinhuber "prepare itcw, unknown opcode 0x%x", cmd); 2446f3eb5384SStefan Weinhuber BUG(); 2447f3eb5384SStefan Weinhuber break; 2448f3eb5384SStefan Weinhuber } 2449f3eb5384SStefan Weinhuber if (rc) 2450f3eb5384SStefan Weinhuber return rc; 2451f3eb5384SStefan Weinhuber 2452f3eb5384SStefan Weinhuber dedata->attributes.mode = 0x3; /* ECKD */ 2453f3eb5384SStefan Weinhuber 2454f3eb5384SStefan Weinhuber heads = basepriv->rdc_data.trk_per_cyl; 2455f3eb5384SStefan Weinhuber begcyl = trk / heads; 2456f3eb5384SStefan Weinhuber beghead = trk % heads; 2457f3eb5384SStefan Weinhuber endcyl = totrk / heads; 2458f3eb5384SStefan Weinhuber endhead = totrk % heads; 2459f3eb5384SStefan Weinhuber 2460f3eb5384SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 2461f3eb5384SStefan Weinhuber if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 2462f3eb5384SStefan Weinhuber dedata->attributes.operation == DASD_SEQ_ACCESS) { 2463f3eb5384SStefan Weinhuber 2464f3eb5384SStefan Weinhuber if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 2465f3eb5384SStefan Weinhuber endcyl += basepriv->attrib.nr_cyl; 2466f3eb5384SStefan Weinhuber else 2467f3eb5384SStefan Weinhuber endcyl = (basepriv->real_cyl - 1); 2468f3eb5384SStefan Weinhuber } 2469f3eb5384SStefan Weinhuber 2470f3eb5384SStefan Weinhuber set_ch_t(&dedata->beg_ext, begcyl, beghead); 2471f3eb5384SStefan Weinhuber set_ch_t(&dedata->end_ext, endcyl, endhead); 2472f3eb5384SStefan Weinhuber 2473f3eb5384SStefan Weinhuber dedata->ep_format = 0x20; /* records per track is valid */ 2474f3eb5384SStefan Weinhuber dedata->ep_rec_per_track = blk_per_trk; 2475f3eb5384SStefan Weinhuber 2476f3eb5384SStefan Weinhuber if (rec_on_trk) { 2477f3eb5384SStefan Weinhuber switch (basepriv->rdc_data.dev_type) { 2478f3eb5384SStefan Weinhuber case 0x3390: 2479f3eb5384SStefan Weinhuber dn = ceil_quot(blksize + 6, 232); 2480f3eb5384SStefan Weinhuber d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); 2481f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 2482f3eb5384SStefan Weinhuber break; 2483f3eb5384SStefan Weinhuber case 0x3380: 2484f3eb5384SStefan Weinhuber d = 7 + ceil_quot(blksize + 12, 32); 2485f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 2486f3eb5384SStefan Weinhuber break; 2487f3eb5384SStefan Weinhuber } 2488f3eb5384SStefan Weinhuber } 2489f3eb5384SStefan Weinhuber 2490f3eb5384SStefan Weinhuber lredata->auxiliary.length_valid = 1; 2491f3eb5384SStefan Weinhuber lredata->auxiliary.length_scope = 1; 2492f3eb5384SStefan Weinhuber lredata->auxiliary.imbedded_ccw_valid = 1; 2493f3eb5384SStefan Weinhuber lredata->length = tlf; 2494f3eb5384SStefan Weinhuber lredata->imbedded_ccw = cmd; 2495f3eb5384SStefan Weinhuber lredata->count = count; 2496f3eb5384SStefan Weinhuber lredata->sector = sector; 2497f3eb5384SStefan Weinhuber set_ch_t(&lredata->seek_addr, begcyl, beghead); 2498f3eb5384SStefan Weinhuber lredata->search_arg.cyl = lredata->seek_addr.cyl; 2499f3eb5384SStefan Weinhuber lredata->search_arg.head = lredata->seek_addr.head; 2500f3eb5384SStefan Weinhuber lredata->search_arg.record = rec_on_trk; 2501f3eb5384SStefan Weinhuber 2502f3eb5384SStefan Weinhuber dcw = itcw_add_dcw(itcw, pfx_cmd, 0, 2503f3eb5384SStefan Weinhuber &pfxdata, sizeof(pfxdata), total_data_size); 2504f3eb5384SStefan Weinhuber 2505f3eb5384SStefan Weinhuber return rc; 2506f3eb5384SStefan Weinhuber } 2507f3eb5384SStefan Weinhuber 2508f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 2509f3eb5384SStefan Weinhuber struct dasd_device *startdev, 2510f3eb5384SStefan Weinhuber struct dasd_block *block, 2511f3eb5384SStefan Weinhuber struct request *req, 2512f3eb5384SStefan Weinhuber sector_t first_rec, 2513f3eb5384SStefan Weinhuber sector_t last_rec, 2514f3eb5384SStefan Weinhuber sector_t first_trk, 2515f3eb5384SStefan Weinhuber sector_t last_trk, 2516f3eb5384SStefan Weinhuber unsigned int first_offs, 2517f3eb5384SStefan Weinhuber unsigned int last_offs, 2518f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 2519f3eb5384SStefan Weinhuber unsigned int blksize) 2520f3eb5384SStefan Weinhuber { 2521f3eb5384SStefan Weinhuber struct dasd_eckd_private *private; 2522f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 2523f3eb5384SStefan Weinhuber struct req_iterator iter; 2524f3eb5384SStefan Weinhuber struct bio_vec *bv; 2525f3eb5384SStefan Weinhuber char *dst; 2526f3eb5384SStefan Weinhuber unsigned int trkcount, ctidaw; 2527f3eb5384SStefan Weinhuber unsigned char cmd; 2528f3eb5384SStefan Weinhuber struct dasd_device *basedev; 2529f3eb5384SStefan Weinhuber unsigned int tlf; 2530f3eb5384SStefan Weinhuber struct itcw *itcw; 2531f3eb5384SStefan Weinhuber struct tidaw *last_tidaw = NULL; 2532f3eb5384SStefan Weinhuber int itcw_op; 2533f3eb5384SStefan Weinhuber size_t itcw_size; 2534ef19298bSStefan Weinhuber u8 tidaw_flags; 2535ef19298bSStefan Weinhuber unsigned int seg_len, part_len, len_to_track_end; 2536ef19298bSStefan Weinhuber unsigned char new_track; 2537ef19298bSStefan Weinhuber sector_t recid, trkid; 2538ef19298bSStefan Weinhuber unsigned int offs; 2539ef19298bSStefan Weinhuber unsigned int count, count_to_trk_end; 2540f3eb5384SStefan Weinhuber 2541f3eb5384SStefan Weinhuber basedev = block->base; 2542f3eb5384SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 2543f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) { 2544f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 2545f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_READ; 2546f3eb5384SStefan Weinhuber } else if (rq_data_dir(req) == WRITE) { 2547f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 2548f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_WRITE; 2549f3eb5384SStefan Weinhuber } else 2550f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 2551f3eb5384SStefan Weinhuber 2552f3eb5384SStefan Weinhuber /* trackbased I/O needs address all memory via TIDAWs, 2553f3eb5384SStefan Weinhuber * not just for 64 bit addresses. This allows us to map 2554f3eb5384SStefan Weinhuber * each segment directly to one tidaw. 2555ef19298bSStefan Weinhuber * In the case of write requests, additional tidaws may 2556ef19298bSStefan Weinhuber * be needed when a segment crosses a track boundary. 2557f3eb5384SStefan Weinhuber */ 2558f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 2559f3eb5384SStefan Weinhuber ctidaw = 0; 2560f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 2561f3eb5384SStefan Weinhuber ++ctidaw; 2562f3eb5384SStefan Weinhuber } 2563ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 2564ef19298bSStefan Weinhuber ctidaw += (last_trk - first_trk); 2565f3eb5384SStefan Weinhuber 2566f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 2567f3eb5384SStefan Weinhuber itcw_size = itcw_calc_size(0, ctidaw, 0); 256868b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 2569f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 2570f3eb5384SStefan Weinhuber return cqr; 2571f3eb5384SStefan Weinhuber 2572f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 2573f3eb5384SStefan Weinhuber if (first_trk == last_trk) 2574f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 2575f3eb5384SStefan Weinhuber else 2576f3eb5384SStefan Weinhuber tlf = last_offs + 1; 2577f3eb5384SStefan Weinhuber tlf *= blksize; 2578f3eb5384SStefan Weinhuber 2579f3eb5384SStefan Weinhuber itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); 2580ef19298bSStefan Weinhuber if (IS_ERR(itcw)) { 2581ef19298bSStefan Weinhuber dasd_sfree_request(cqr, startdev); 2582ef19298bSStefan Weinhuber return ERR_PTR(-EINVAL); 2583ef19298bSStefan Weinhuber } 2584f3eb5384SStefan Weinhuber cqr->cpaddr = itcw_get_tcw(itcw); 2585f3eb5384SStefan Weinhuber if (prepare_itcw(itcw, first_trk, last_trk, 2586f3eb5384SStefan Weinhuber cmd, basedev, startdev, 2587f3eb5384SStefan Weinhuber first_offs + 1, 2588f3eb5384SStefan Weinhuber trkcount, blksize, 2589f3eb5384SStefan Weinhuber (last_rec - first_rec + 1) * blksize, 2590f3eb5384SStefan Weinhuber tlf, blk_per_trk) == -EAGAIN) { 2591f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 2592f3eb5384SStefan Weinhuber * Try again later. 2593f3eb5384SStefan Weinhuber */ 2594f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 2595f3eb5384SStefan Weinhuber return ERR_PTR(-EAGAIN); 2596f3eb5384SStefan Weinhuber } 2597f3eb5384SStefan Weinhuber /* 2598f3eb5384SStefan Weinhuber * A tidaw can address 4k of memory, but must not cross page boundaries 2599f3eb5384SStefan Weinhuber * We can let the block layer handle this by setting 2600f3eb5384SStefan Weinhuber * blk_queue_segment_boundary to page boundaries and 2601f3eb5384SStefan Weinhuber * blk_max_segment_size to page size when setting up the request queue. 2602ef19298bSStefan Weinhuber * For write requests, a TIDAW must not cross track boundaries, because 2603ef19298bSStefan Weinhuber * we have to set the CBC flag on the last tidaw for each track. 2604f3eb5384SStefan Weinhuber */ 2605ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) { 2606ef19298bSStefan Weinhuber new_track = 1; 2607ef19298bSStefan Weinhuber recid = first_rec; 2608f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 2609f3eb5384SStefan Weinhuber dst = page_address(bv->bv_page) + bv->bv_offset; 2610ef19298bSStefan Weinhuber seg_len = bv->bv_len; 2611ef19298bSStefan Weinhuber while (seg_len) { 2612ef19298bSStefan Weinhuber if (new_track) { 2613ef19298bSStefan Weinhuber trkid = recid; 2614ef19298bSStefan Weinhuber offs = sector_div(trkid, blk_per_trk); 2615ef19298bSStefan Weinhuber count_to_trk_end = blk_per_trk - offs; 2616ef19298bSStefan Weinhuber count = min((last_rec - recid + 1), 2617ef19298bSStefan Weinhuber (sector_t)count_to_trk_end); 2618ef19298bSStefan Weinhuber len_to_track_end = count * blksize; 2619ef19298bSStefan Weinhuber recid += count; 2620ef19298bSStefan Weinhuber new_track = 0; 2621f3eb5384SStefan Weinhuber } 2622ef19298bSStefan Weinhuber part_len = min(seg_len, len_to_track_end); 2623ef19298bSStefan Weinhuber seg_len -= part_len; 2624ef19298bSStefan Weinhuber len_to_track_end -= part_len; 2625ef19298bSStefan Weinhuber /* We need to end the tidaw at track end */ 2626ef19298bSStefan Weinhuber if (!len_to_track_end) { 2627ef19298bSStefan Weinhuber new_track = 1; 2628ef19298bSStefan Weinhuber tidaw_flags = TIDAW_FLAGS_INSERT_CBC; 2629ef19298bSStefan Weinhuber } else 2630ef19298bSStefan Weinhuber tidaw_flags = 0; 2631ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, 2632ef19298bSStefan Weinhuber dst, part_len); 2633ef19298bSStefan Weinhuber if (IS_ERR(last_tidaw)) 2634ef19298bSStefan Weinhuber return ERR_PTR(-EINVAL); 2635ef19298bSStefan Weinhuber dst += part_len; 2636ef19298bSStefan Weinhuber } 2637ef19298bSStefan Weinhuber } 2638ef19298bSStefan Weinhuber } else { 2639ef19298bSStefan Weinhuber rq_for_each_segment(bv, req, iter) { 2640ef19298bSStefan Weinhuber dst = page_address(bv->bv_page) + bv->bv_offset; 2641ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, 0x00, 2642ef19298bSStefan Weinhuber dst, bv->bv_len); 2643ef19298bSStefan Weinhuber if (IS_ERR(last_tidaw)) 2644ef19298bSStefan Weinhuber return ERR_PTR(-EINVAL); 2645ef19298bSStefan Weinhuber } 2646ef19298bSStefan Weinhuber } 2647ef19298bSStefan Weinhuber last_tidaw->flags |= TIDAW_FLAGS_LAST; 2648ef19298bSStefan Weinhuber last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; 2649f3eb5384SStefan Weinhuber itcw_finalize(itcw); 2650f3eb5384SStefan Weinhuber 2651f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 2652f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 2653f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2654ef19298bSStefan Weinhuber cqr->cpmode = 1; 2655f3eb5384SStefan Weinhuber cqr->startdev = startdev; 2656f3eb5384SStefan Weinhuber cqr->memdev = startdev; 2657f3eb5384SStefan Weinhuber cqr->block = block; 26587c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 2659a4d26c6aSStefan Weinhuber cqr->lpm = startdev->path_data.ppm; 2660f3eb5384SStefan Weinhuber cqr->retries = 256; 2661f3eb5384SStefan Weinhuber cqr->buildclk = get_clock(); 2662f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 2663f3eb5384SStefan Weinhuber return cqr; 2664f3eb5384SStefan Weinhuber } 2665f3eb5384SStefan Weinhuber 2666f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 2667f3eb5384SStefan Weinhuber struct dasd_block *block, 2668f3eb5384SStefan Weinhuber struct request *req) 2669f3eb5384SStefan Weinhuber { 2670ef19298bSStefan Weinhuber int cmdrtd, cmdwtd; 2671f3eb5384SStefan Weinhuber int use_prefix; 2672ef19298bSStefan Weinhuber int fcx_multitrack; 267345b44d76SStefan Weinhuber struct dasd_eckd_private *private; 2674f3eb5384SStefan Weinhuber struct dasd_device *basedev; 2675f3eb5384SStefan Weinhuber sector_t first_rec, last_rec; 2676f3eb5384SStefan Weinhuber sector_t first_trk, last_trk; 2677f3eb5384SStefan Weinhuber unsigned int first_offs, last_offs; 2678f3eb5384SStefan Weinhuber unsigned int blk_per_trk, blksize; 2679f3eb5384SStefan Weinhuber int cdlspecial; 2680ef19298bSStefan Weinhuber unsigned int data_size; 2681f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 2682f3eb5384SStefan Weinhuber 2683f3eb5384SStefan Weinhuber basedev = block->base; 2684f3eb5384SStefan Weinhuber private = (struct dasd_eckd_private *) basedev->private; 2685f3eb5384SStefan Weinhuber 2686f3eb5384SStefan Weinhuber /* Calculate number of blocks/records per track. */ 2687f3eb5384SStefan Weinhuber blksize = block->bp_block; 2688f3eb5384SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 26896fca97a9SStefan Haberland if (blk_per_trk == 0) 26906fca97a9SStefan Haberland return ERR_PTR(-EINVAL); 2691f3eb5384SStefan Weinhuber /* Calculate record id of first and last block. */ 269283096ebfSTejun Heo first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; 2693f3eb5384SStefan Weinhuber first_offs = sector_div(first_trk, blk_per_trk); 2694f3eb5384SStefan Weinhuber last_rec = last_trk = 269583096ebfSTejun Heo (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 2696f3eb5384SStefan Weinhuber last_offs = sector_div(last_trk, blk_per_trk); 2697f3eb5384SStefan Weinhuber cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); 2698f3eb5384SStefan Weinhuber 2699ef19298bSStefan Weinhuber fcx_multitrack = private->features.feature[40] & 0x20; 2700ef19298bSStefan Weinhuber data_size = blk_rq_bytes(req); 2701ef19298bSStefan Weinhuber /* tpm write request add CBC data on each track boundary */ 2702ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 2703ef19298bSStefan Weinhuber data_size += (last_trk - first_trk) * 4; 2704f3eb5384SStefan Weinhuber 2705f3eb5384SStefan Weinhuber /* is read track data and write track data in command mode supported? */ 2706f3eb5384SStefan Weinhuber cmdrtd = private->features.feature[9] & 0x20; 2707f3eb5384SStefan Weinhuber cmdwtd = private->features.feature[12] & 0x40; 2708f3eb5384SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 2709f3eb5384SStefan Weinhuber 2710f3eb5384SStefan Weinhuber cqr = NULL; 2711f3eb5384SStefan Weinhuber if (cdlspecial || dasd_page_cache) { 2712f3eb5384SStefan Weinhuber /* do nothing, just fall through to the cmd mode single case */ 2713ef19298bSStefan Weinhuber } else if ((data_size <= private->fcx_max_data) 2714ef19298bSStefan Weinhuber && (fcx_multitrack || (first_trk == last_trk))) { 2715f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, 2716f3eb5384SStefan Weinhuber first_rec, last_rec, 2717f3eb5384SStefan Weinhuber first_trk, last_trk, 2718f3eb5384SStefan Weinhuber first_offs, last_offs, 2719f3eb5384SStefan Weinhuber blk_per_trk, blksize); 2720ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 2721ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 2722f3eb5384SStefan Weinhuber cqr = NULL; 2723f3eb5384SStefan Weinhuber } else if (use_prefix && 2724f3eb5384SStefan Weinhuber (((rq_data_dir(req) == READ) && cmdrtd) || 2725f3eb5384SStefan Weinhuber ((rq_data_dir(req) == WRITE) && cmdwtd))) { 2726f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, 2727f3eb5384SStefan Weinhuber first_rec, last_rec, 2728f3eb5384SStefan Weinhuber first_trk, last_trk, 2729f3eb5384SStefan Weinhuber first_offs, last_offs, 2730f3eb5384SStefan Weinhuber blk_per_trk, blksize); 2731ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 2732ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 2733f3eb5384SStefan Weinhuber cqr = NULL; 2734f3eb5384SStefan Weinhuber } 2735f3eb5384SStefan Weinhuber if (!cqr) 2736f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, 2737f3eb5384SStefan Weinhuber first_rec, last_rec, 2738f3eb5384SStefan Weinhuber first_trk, last_trk, 2739f3eb5384SStefan Weinhuber first_offs, last_offs, 2740f3eb5384SStefan Weinhuber blk_per_trk, blksize); 2741f3eb5384SStefan Weinhuber return cqr; 2742f3eb5384SStefan Weinhuber } 2743f3eb5384SStefan Weinhuber 27441da177e4SLinus Torvalds static int 27451da177e4SLinus Torvalds dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 27461da177e4SLinus Torvalds { 27471da177e4SLinus Torvalds struct dasd_eckd_private *private; 27481da177e4SLinus Torvalds struct ccw1 *ccw; 27495705f702SNeilBrown struct req_iterator iter; 27501da177e4SLinus Torvalds struct bio_vec *bv; 27511da177e4SLinus Torvalds char *dst, *cda; 27521da177e4SLinus Torvalds unsigned int blksize, blk_per_trk, off; 27531da177e4SLinus Torvalds sector_t recid; 27545705f702SNeilBrown int status; 27551da177e4SLinus Torvalds 27561da177e4SLinus Torvalds if (!dasd_page_cache) 27571da177e4SLinus Torvalds goto out; 27588e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) cqr->block->base->private; 27598e09f215SStefan Weinhuber blksize = cqr->block->bp_block; 27601da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 276183096ebfSTejun Heo recid = blk_rq_pos(req) >> cqr->block->s2b_shift; 27621da177e4SLinus Torvalds ccw = cqr->cpaddr; 27631da177e4SLinus Torvalds /* Skip over define extent & locate record. */ 27641da177e4SLinus Torvalds ccw++; 27651da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 27661da177e4SLinus Torvalds ccw++; 27675705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 27681da177e4SLinus Torvalds dst = page_address(bv->bv_page) + bv->bv_offset; 27691da177e4SLinus Torvalds for (off = 0; off < bv->bv_len; off += blksize) { 27701da177e4SLinus Torvalds /* Skip locate record. */ 27711da177e4SLinus Torvalds if (private->uses_cdl && recid <= 2*blk_per_trk) 27721da177e4SLinus Torvalds ccw++; 27731da177e4SLinus Torvalds if (dst) { 27741da177e4SLinus Torvalds if (ccw->flags & CCW_FLAG_IDA) 27751da177e4SLinus Torvalds cda = *((char **)((addr_t) ccw->cda)); 27761da177e4SLinus Torvalds else 27771da177e4SLinus Torvalds cda = (char *)((addr_t) ccw->cda); 27781da177e4SLinus Torvalds if (dst != cda) { 27791da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 27801da177e4SLinus Torvalds memcpy(dst, cda, bv->bv_len); 27811da177e4SLinus Torvalds kmem_cache_free(dasd_page_cache, 27821da177e4SLinus Torvalds (void *)((addr_t)cda & PAGE_MASK)); 27831da177e4SLinus Torvalds } 27841da177e4SLinus Torvalds dst = NULL; 27851da177e4SLinus Torvalds } 27861da177e4SLinus Torvalds ccw++; 27871da177e4SLinus Torvalds recid++; 27881da177e4SLinus Torvalds } 27891da177e4SLinus Torvalds } 27901da177e4SLinus Torvalds out: 27911da177e4SLinus Torvalds status = cqr->status == DASD_CQR_DONE; 27928e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 27931da177e4SLinus Torvalds return status; 27941da177e4SLinus Torvalds } 27951da177e4SLinus Torvalds 27968e09f215SStefan Weinhuber /* 2797f3eb5384SStefan Weinhuber * Modify ccw/tcw in cqr so it can be started on a base device. 27988e09f215SStefan Weinhuber * 27998e09f215SStefan Weinhuber * Note that this is not enough to restart the cqr! 28008e09f215SStefan Weinhuber * Either reset cqr->startdev as well (summary unit check handling) 28018e09f215SStefan Weinhuber * or restart via separate cqr (as in ERP handling). 28028e09f215SStefan Weinhuber */ 28038e09f215SStefan Weinhuber void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 28048e09f215SStefan Weinhuber { 28058e09f215SStefan Weinhuber struct ccw1 *ccw; 28068e09f215SStefan Weinhuber struct PFX_eckd_data *pfxdata; 2807f3eb5384SStefan Weinhuber struct tcw *tcw; 2808f3eb5384SStefan Weinhuber struct tccb *tccb; 2809f3eb5384SStefan Weinhuber struct dcw *dcw; 28108e09f215SStefan Weinhuber 2811f3eb5384SStefan Weinhuber if (cqr->cpmode == 1) { 2812f3eb5384SStefan Weinhuber tcw = cqr->cpaddr; 2813f3eb5384SStefan Weinhuber tccb = tcw_get_tccb(tcw); 2814f3eb5384SStefan Weinhuber dcw = (struct dcw *)&tccb->tca[0]; 2815f3eb5384SStefan Weinhuber pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; 2816f3eb5384SStefan Weinhuber pfxdata->validity.verify_base = 0; 2817f3eb5384SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 2818f3eb5384SStefan Weinhuber } else { 28198e09f215SStefan Weinhuber ccw = cqr->cpaddr; 28208e09f215SStefan Weinhuber pfxdata = cqr->data; 28218e09f215SStefan Weinhuber if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 28228e09f215SStefan Weinhuber pfxdata->validity.verify_base = 0; 28238e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 28248e09f215SStefan Weinhuber } 28258e09f215SStefan Weinhuber } 2826f3eb5384SStefan Weinhuber } 28278e09f215SStefan Weinhuber 28288e09f215SStefan Weinhuber #define DASD_ECKD_CHANQ_MAX_SIZE 4 28298e09f215SStefan Weinhuber 28308e09f215SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 28318e09f215SStefan Weinhuber struct dasd_block *block, 28328e09f215SStefan Weinhuber struct request *req) 28338e09f215SStefan Weinhuber { 28348e09f215SStefan Weinhuber struct dasd_eckd_private *private; 28358e09f215SStefan Weinhuber struct dasd_device *startdev; 28368e09f215SStefan Weinhuber unsigned long flags; 28378e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 28388e09f215SStefan Weinhuber 28398e09f215SStefan Weinhuber startdev = dasd_alias_get_start_dev(base); 28408e09f215SStefan Weinhuber if (!startdev) 28418e09f215SStefan Weinhuber startdev = base; 28428e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) startdev->private; 28438e09f215SStefan Weinhuber if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 28448e09f215SStefan Weinhuber return ERR_PTR(-EBUSY); 28458e09f215SStefan Weinhuber 28468e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 28478e09f215SStefan Weinhuber private->count++; 28488e09f215SStefan Weinhuber cqr = dasd_eckd_build_cp(startdev, block, req); 28498e09f215SStefan Weinhuber if (IS_ERR(cqr)) 28508e09f215SStefan Weinhuber private->count--; 28518e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 28528e09f215SStefan Weinhuber return cqr; 28538e09f215SStefan Weinhuber } 28548e09f215SStefan Weinhuber 28558e09f215SStefan Weinhuber static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 28568e09f215SStefan Weinhuber struct request *req) 28578e09f215SStefan Weinhuber { 28588e09f215SStefan Weinhuber struct dasd_eckd_private *private; 28598e09f215SStefan Weinhuber unsigned long flags; 28608e09f215SStefan Weinhuber 28618e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 28628e09f215SStefan Weinhuber private = (struct dasd_eckd_private *) cqr->memdev->private; 28638e09f215SStefan Weinhuber private->count--; 28648e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 28658e09f215SStefan Weinhuber return dasd_eckd_free_cp(cqr, req); 28668e09f215SStefan Weinhuber } 28678e09f215SStefan Weinhuber 28681da177e4SLinus Torvalds static int 28691da177e4SLinus Torvalds dasd_eckd_fill_info(struct dasd_device * device, 28701da177e4SLinus Torvalds struct dasd_information2_t * info) 28711da177e4SLinus Torvalds { 28721da177e4SLinus Torvalds struct dasd_eckd_private *private; 28731da177e4SLinus Torvalds 28741da177e4SLinus Torvalds private = (struct dasd_eckd_private *) device->private; 28751da177e4SLinus Torvalds info->label_block = 2; 28761da177e4SLinus Torvalds info->FBA_layout = private->uses_cdl ? 0 : 1; 28771da177e4SLinus Torvalds info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 28781da177e4SLinus Torvalds info->characteristics_size = sizeof(struct dasd_eckd_characteristics); 28791da177e4SLinus Torvalds memcpy(info->characteristics, &private->rdc_data, 28801da177e4SLinus Torvalds sizeof(struct dasd_eckd_characteristics)); 28814abb08c2SStefan Weinhuber info->confdata_size = min((unsigned long)private->conf_len, 28824abb08c2SStefan Weinhuber sizeof(info->configuration_data)); 28834abb08c2SStefan Weinhuber memcpy(info->configuration_data, private->conf_data, 28844abb08c2SStefan Weinhuber info->confdata_size); 28851da177e4SLinus Torvalds return 0; 28861da177e4SLinus Torvalds } 28871da177e4SLinus Torvalds 28881da177e4SLinus Torvalds /* 28891da177e4SLinus Torvalds * SECTION: ioctl functions for eckd devices. 28901da177e4SLinus Torvalds */ 28911da177e4SLinus Torvalds 28921da177e4SLinus Torvalds /* 28931da177e4SLinus Torvalds * Release device ioctl. 28941da177e4SLinus Torvalds * Buils a channel programm to releases a prior reserved 28951da177e4SLinus Torvalds * (see dasd_eckd_reserve) device. 28961da177e4SLinus Torvalds */ 28971da177e4SLinus Torvalds static int 28981107ccfbSChristoph Hellwig dasd_eckd_release(struct dasd_device *device) 28991da177e4SLinus Torvalds { 29001da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 29011da177e4SLinus Torvalds int rc; 2902f3eb5384SStefan Weinhuber struct ccw1 *ccw; 2903f932bceaSStefan Weinhuber int useglobal; 29041da177e4SLinus Torvalds 29051da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 29061da177e4SLinus Torvalds return -EACCES; 29071da177e4SLinus Torvalds 2908f932bceaSStefan Weinhuber useglobal = 0; 290968b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 29101da177e4SLinus Torvalds if (IS_ERR(cqr)) { 2911f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 2912f932bceaSStefan Weinhuber useglobal = 1; 2913f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 2914f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 2915f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 2916f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 2917f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 2918f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 2919f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 29201da177e4SLinus Torvalds } 2921f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 2922f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RELEASE; 2923f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 2924f3eb5384SStefan Weinhuber ccw->count = 32; 2925f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 29268e09f215SStefan Weinhuber cqr->startdev = device; 29278e09f215SStefan Weinhuber cqr->memdev = device; 29281da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 29291c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2930336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 29311da177e4SLinus Torvalds cqr->expires = 2 * HZ; 29321da177e4SLinus Torvalds cqr->buildclk = get_clock(); 29331da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 29341da177e4SLinus Torvalds 29351da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 29365a27e60dSStefan Weinhuber if (!rc) 29375a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 29381da177e4SLinus Torvalds 2939f932bceaSStefan Weinhuber if (useglobal) 2940f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 2941f932bceaSStefan Weinhuber else 29428e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 29431da177e4SLinus Torvalds return rc; 29441da177e4SLinus Torvalds } 29451da177e4SLinus Torvalds 29461da177e4SLinus Torvalds /* 29471da177e4SLinus Torvalds * Reserve device ioctl. 29481da177e4SLinus Torvalds * Options are set to 'synchronous wait for interrupt' and 29491da177e4SLinus Torvalds * 'timeout the request'. This leads to a terminate IO if 29501da177e4SLinus Torvalds * the interrupt is outstanding for a certain time. 29511da177e4SLinus Torvalds */ 29521da177e4SLinus Torvalds static int 29531107ccfbSChristoph Hellwig dasd_eckd_reserve(struct dasd_device *device) 29541da177e4SLinus Torvalds { 29551da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 29561da177e4SLinus Torvalds int rc; 2957f3eb5384SStefan Weinhuber struct ccw1 *ccw; 2958f932bceaSStefan Weinhuber int useglobal; 29591da177e4SLinus Torvalds 29601da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 29611da177e4SLinus Torvalds return -EACCES; 29621da177e4SLinus Torvalds 2963f932bceaSStefan Weinhuber useglobal = 0; 296468b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 29651da177e4SLinus Torvalds if (IS_ERR(cqr)) { 2966f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 2967f932bceaSStefan Weinhuber useglobal = 1; 2968f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 2969f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 2970f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 2971f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 2972f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 2973f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 2974f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 29751da177e4SLinus Torvalds } 2976f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 2977f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RESERVE; 2978f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 2979f3eb5384SStefan Weinhuber ccw->count = 32; 2980f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 29818e09f215SStefan Weinhuber cqr->startdev = device; 29828e09f215SStefan Weinhuber cqr->memdev = device; 29831da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 29841c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 2985336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 29861da177e4SLinus Torvalds cqr->expires = 2 * HZ; 29871da177e4SLinus Torvalds cqr->buildclk = get_clock(); 29881da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 29891da177e4SLinus Torvalds 29901da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 29915a27e60dSStefan Weinhuber if (!rc) 29925a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 29931da177e4SLinus Torvalds 2994f932bceaSStefan Weinhuber if (useglobal) 2995f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 2996f932bceaSStefan Weinhuber else 29978e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 29981da177e4SLinus Torvalds return rc; 29991da177e4SLinus Torvalds } 30001da177e4SLinus Torvalds 30011da177e4SLinus Torvalds /* 30021da177e4SLinus Torvalds * Steal lock ioctl - unconditional reserve device. 30031da177e4SLinus Torvalds * Buils a channel programm to break a device's reservation. 30041da177e4SLinus Torvalds * (unconditional reserve) 30051da177e4SLinus Torvalds */ 30061da177e4SLinus Torvalds static int 30071107ccfbSChristoph Hellwig dasd_eckd_steal_lock(struct dasd_device *device) 30081da177e4SLinus Torvalds { 30091da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 30101da177e4SLinus Torvalds int rc; 3011f3eb5384SStefan Weinhuber struct ccw1 *ccw; 3012f932bceaSStefan Weinhuber int useglobal; 30131da177e4SLinus Torvalds 30141da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 30151da177e4SLinus Torvalds return -EACCES; 30161da177e4SLinus Torvalds 3017f932bceaSStefan Weinhuber useglobal = 0; 301868b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device); 30191da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3020f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3021f932bceaSStefan Weinhuber useglobal = 1; 3022f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3023f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3024f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3025f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3026f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3027f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3028f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 30291da177e4SLinus Torvalds } 3030f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 3031f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SLCK; 3032f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3033f3eb5384SStefan Weinhuber ccw->count = 32; 3034f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 30358e09f215SStefan Weinhuber cqr->startdev = device; 30368e09f215SStefan Weinhuber cqr->memdev = device; 30371da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 30381c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3039336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 30401da177e4SLinus Torvalds cqr->expires = 2 * HZ; 30411da177e4SLinus Torvalds cqr->buildclk = get_clock(); 30421da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 30431da177e4SLinus Torvalds 30441da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 30455a27e60dSStefan Weinhuber if (!rc) 30465a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 30471da177e4SLinus Torvalds 3048f932bceaSStefan Weinhuber if (useglobal) 3049f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3050f932bceaSStefan Weinhuber else 30518e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 30521da177e4SLinus Torvalds return rc; 30531da177e4SLinus Torvalds } 30541da177e4SLinus Torvalds 30551da177e4SLinus Torvalds /* 3056196339f1SStefan Weinhuber * SNID - Sense Path Group ID 3057196339f1SStefan Weinhuber * This ioctl may be used in situations where I/O is stalled due to 3058196339f1SStefan Weinhuber * a reserve, so if the normal dasd_smalloc_request fails, we use the 3059196339f1SStefan Weinhuber * preallocated dasd_reserve_req. 3060196339f1SStefan Weinhuber */ 3061196339f1SStefan Weinhuber static int dasd_eckd_snid(struct dasd_device *device, 3062196339f1SStefan Weinhuber void __user *argp) 3063196339f1SStefan Weinhuber { 3064196339f1SStefan Weinhuber struct dasd_ccw_req *cqr; 3065196339f1SStefan Weinhuber int rc; 3066196339f1SStefan Weinhuber struct ccw1 *ccw; 3067196339f1SStefan Weinhuber int useglobal; 3068196339f1SStefan Weinhuber struct dasd_snid_ioctl_data usrparm; 3069196339f1SStefan Weinhuber 3070196339f1SStefan Weinhuber if (!capable(CAP_SYS_ADMIN)) 3071196339f1SStefan Weinhuber return -EACCES; 3072196339f1SStefan Weinhuber 3073196339f1SStefan Weinhuber if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 3074196339f1SStefan Weinhuber return -EFAULT; 3075196339f1SStefan Weinhuber 3076196339f1SStefan Weinhuber useglobal = 0; 3077196339f1SStefan Weinhuber cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 3078196339f1SStefan Weinhuber sizeof(struct dasd_snid_data), device); 3079196339f1SStefan Weinhuber if (IS_ERR(cqr)) { 3080196339f1SStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 3081196339f1SStefan Weinhuber useglobal = 1; 3082196339f1SStefan Weinhuber cqr = &dasd_reserve_req->cqr; 3083196339f1SStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 3084196339f1SStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 3085196339f1SStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 3086196339f1SStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 3087196339f1SStefan Weinhuber cqr->data = &dasd_reserve_req->data; 3088196339f1SStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 3089196339f1SStefan Weinhuber } 3090196339f1SStefan Weinhuber ccw = cqr->cpaddr; 3091196339f1SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SNID; 3092196339f1SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3093196339f1SStefan Weinhuber ccw->count = 12; 3094196339f1SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 3095196339f1SStefan Weinhuber cqr->startdev = device; 3096196339f1SStefan Weinhuber cqr->memdev = device; 3097196339f1SStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 3098196339f1SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 30995a27e60dSStefan Weinhuber set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 3100196339f1SStefan Weinhuber cqr->retries = 5; 3101196339f1SStefan Weinhuber cqr->expires = 10 * HZ; 3102196339f1SStefan Weinhuber cqr->buildclk = get_clock(); 3103196339f1SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 3104196339f1SStefan Weinhuber cqr->lpm = usrparm.path_mask; 3105196339f1SStefan Weinhuber 3106196339f1SStefan Weinhuber rc = dasd_sleep_on_immediatly(cqr); 3107196339f1SStefan Weinhuber /* verify that I/O processing didn't modify the path mask */ 3108196339f1SStefan Weinhuber if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) 3109196339f1SStefan Weinhuber rc = -EIO; 3110196339f1SStefan Weinhuber if (!rc) { 3111196339f1SStefan Weinhuber usrparm.data = *((struct dasd_snid_data *)cqr->data); 3112196339f1SStefan Weinhuber if (copy_to_user(argp, &usrparm, sizeof(usrparm))) 3113196339f1SStefan Weinhuber rc = -EFAULT; 3114196339f1SStefan Weinhuber } 3115196339f1SStefan Weinhuber 3116196339f1SStefan Weinhuber if (useglobal) 3117196339f1SStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 3118196339f1SStefan Weinhuber else 3119196339f1SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 3120196339f1SStefan Weinhuber return rc; 3121196339f1SStefan Weinhuber } 3122196339f1SStefan Weinhuber 3123196339f1SStefan Weinhuber /* 31241da177e4SLinus Torvalds * Read performance statistics 31251da177e4SLinus Torvalds */ 31261da177e4SLinus Torvalds static int 31271107ccfbSChristoph Hellwig dasd_eckd_performance(struct dasd_device *device, void __user *argp) 31281da177e4SLinus Torvalds { 31291da177e4SLinus Torvalds struct dasd_psf_prssd_data *prssdp; 31301da177e4SLinus Torvalds struct dasd_rssd_perf_stats_t *stats; 31311da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 31321da177e4SLinus Torvalds struct ccw1 *ccw; 31331da177e4SLinus Torvalds int rc; 31341da177e4SLinus Torvalds 313568b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 31361da177e4SLinus Torvalds (sizeof(struct dasd_psf_prssd_data) + 31371da177e4SLinus Torvalds sizeof(struct dasd_rssd_perf_stats_t)), 31381da177e4SLinus Torvalds device); 31391da177e4SLinus Torvalds if (IS_ERR(cqr)) { 3140fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 31411da177e4SLinus Torvalds "Could not allocate initialization request"); 31421da177e4SLinus Torvalds return PTR_ERR(cqr); 31431da177e4SLinus Torvalds } 31448e09f215SStefan Weinhuber cqr->startdev = device; 31458e09f215SStefan Weinhuber cqr->memdev = device; 31461da177e4SLinus Torvalds cqr->retries = 0; 3147eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 31481da177e4SLinus Torvalds cqr->expires = 10 * HZ; 31491da177e4SLinus Torvalds 31501da177e4SLinus Torvalds /* Prepare for Read Subsystem Data */ 31511da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 31521da177e4SLinus Torvalds memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 31531da177e4SLinus Torvalds prssdp->order = PSF_ORDER_PRSSD; 31545d67d164SJoe Perches prssdp->suborder = 0x01; /* Performance Statistics */ 31551da177e4SLinus Torvalds prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 31561da177e4SLinus Torvalds 31571da177e4SLinus Torvalds ccw = cqr->cpaddr; 31581da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_PSF; 31591da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_psf_prssd_data); 31601da177e4SLinus Torvalds ccw->flags |= CCW_FLAG_CC; 31611da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) prssdp; 31621da177e4SLinus Torvalds 31631da177e4SLinus Torvalds /* Read Subsystem Data - Performance Statistics */ 31641da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 31651da177e4SLinus Torvalds memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 31661da177e4SLinus Torvalds 31671da177e4SLinus Torvalds ccw++; 31681da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_RSSD; 31691da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 31701da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) stats; 31711da177e4SLinus Torvalds 31721da177e4SLinus Torvalds cqr->buildclk = get_clock(); 31731da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 31741da177e4SLinus Torvalds rc = dasd_sleep_on(cqr); 31751da177e4SLinus Torvalds if (rc == 0) { 31761da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 31771da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 31781107ccfbSChristoph Hellwig if (copy_to_user(argp, stats, 31791107ccfbSChristoph Hellwig sizeof(struct dasd_rssd_perf_stats_t))) 31801107ccfbSChristoph Hellwig rc = -EFAULT; 31811da177e4SLinus Torvalds } 31828e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 31831da177e4SLinus Torvalds return rc; 31841da177e4SLinus Torvalds } 31851da177e4SLinus Torvalds 31861da177e4SLinus Torvalds /* 31871da177e4SLinus Torvalds * Get attributes (cache operations) 31881da177e4SLinus Torvalds * Returnes the cache attributes used in Define Extend (DE). 31891da177e4SLinus Torvalds */ 31901da177e4SLinus Torvalds static int 31911107ccfbSChristoph Hellwig dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 31921da177e4SLinus Torvalds { 31931107ccfbSChristoph Hellwig struct dasd_eckd_private *private = 31941107ccfbSChristoph Hellwig (struct dasd_eckd_private *)device->private; 31951107ccfbSChristoph Hellwig struct attrib_data_t attrib = private->attrib; 31961da177e4SLinus Torvalds int rc; 31971da177e4SLinus Torvalds 31981da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 31991da177e4SLinus Torvalds return -EACCES; 32001107ccfbSChristoph Hellwig if (!argp) 32011da177e4SLinus Torvalds return -EINVAL; 32021da177e4SLinus Torvalds 32031107ccfbSChristoph Hellwig rc = 0; 32041107ccfbSChristoph Hellwig if (copy_to_user(argp, (long *) &attrib, 32051107ccfbSChristoph Hellwig sizeof(struct attrib_data_t))) 32061107ccfbSChristoph Hellwig rc = -EFAULT; 32071da177e4SLinus Torvalds 32081da177e4SLinus Torvalds return rc; 32091da177e4SLinus Torvalds } 32101da177e4SLinus Torvalds 32111da177e4SLinus Torvalds /* 32121da177e4SLinus Torvalds * Set attributes (cache operations) 32131da177e4SLinus Torvalds * Stores the attributes for cache operation to be used in Define Extend (DE). 32141da177e4SLinus Torvalds */ 32151da177e4SLinus Torvalds static int 32161107ccfbSChristoph Hellwig dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 32171da177e4SLinus Torvalds { 32181107ccfbSChristoph Hellwig struct dasd_eckd_private *private = 32191107ccfbSChristoph Hellwig (struct dasd_eckd_private *)device->private; 32201da177e4SLinus Torvalds struct attrib_data_t attrib; 32211da177e4SLinus Torvalds 32221da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 32231da177e4SLinus Torvalds return -EACCES; 32241107ccfbSChristoph Hellwig if (!argp) 32251da177e4SLinus Torvalds return -EINVAL; 32261da177e4SLinus Torvalds 32271107ccfbSChristoph Hellwig if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 32281da177e4SLinus Torvalds return -EFAULT; 32291da177e4SLinus Torvalds private->attrib = attrib; 32301da177e4SLinus Torvalds 3231fc19f381SStefan Haberland dev_info(&device->cdev->dev, 3232fc19f381SStefan Haberland "The DASD cache mode was set to %x (%i cylinder prestage)\n", 32331da177e4SLinus Torvalds private->attrib.operation, private->attrib.nr_cyl); 32341da177e4SLinus Torvalds return 0; 32351da177e4SLinus Torvalds } 32361da177e4SLinus Torvalds 3237ab1d848fSNigel Hislop /* 3238ab1d848fSNigel Hislop * Issue syscall I/O to EMC Symmetrix array. 3239ab1d848fSNigel Hislop * CCWs are PSF and RSSD 3240ab1d848fSNigel Hislop */ 3241ab1d848fSNigel Hislop static int dasd_symm_io(struct dasd_device *device, void __user *argp) 3242ab1d848fSNigel Hislop { 3243ab1d848fSNigel Hislop struct dasd_symmio_parms usrparm; 3244ab1d848fSNigel Hislop char *psf_data, *rssd_result; 3245ab1d848fSNigel Hislop struct dasd_ccw_req *cqr; 3246ab1d848fSNigel Hislop struct ccw1 *ccw; 324752898025SNigel Hislop char psf0, psf1; 3248ab1d848fSNigel Hislop int rc; 3249ab1d848fSNigel Hislop 325052898025SNigel Hislop if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) 325152898025SNigel Hislop return -EACCES; 325252898025SNigel Hislop psf0 = psf1 = 0; 325352898025SNigel Hislop 3254ab1d848fSNigel Hislop /* Copy parms from caller */ 3255ab1d848fSNigel Hislop rc = -EFAULT; 3256ab1d848fSNigel Hislop if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 3257ab1d848fSNigel Hislop goto out; 3258f8b06859SHeiko Carstens if (is_compat_task() || sizeof(long) == 4) { 3259ab1d848fSNigel Hislop /* Make sure pointers are sane even on 31 bit. */ 3260ab1d848fSNigel Hislop rc = -EINVAL; 3261f8b06859SHeiko Carstens if ((usrparm.psf_data >> 32) != 0) 3262ab1d848fSNigel Hislop goto out; 3263f8b06859SHeiko Carstens if ((usrparm.rssd_result >> 32) != 0) 3264f8b06859SHeiko Carstens goto out; 3265f8b06859SHeiko Carstens usrparm.psf_data &= 0x7fffffffULL; 3266f8b06859SHeiko Carstens usrparm.rssd_result &= 0x7fffffffULL; 3267ab1d848fSNigel Hislop } 3268ab1d848fSNigel Hislop /* alloc I/O data area */ 3269ab1d848fSNigel Hislop psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 3270ab1d848fSNigel Hislop rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 3271ab1d848fSNigel Hislop if (!psf_data || !rssd_result) { 3272ab1d848fSNigel Hislop rc = -ENOMEM; 3273ab1d848fSNigel Hislop goto out_free; 3274ab1d848fSNigel Hislop } 3275ab1d848fSNigel Hislop 3276ab1d848fSNigel Hislop /* get syscall header from user space */ 3277ab1d848fSNigel Hislop rc = -EFAULT; 3278ab1d848fSNigel Hislop if (copy_from_user(psf_data, 3279ab1d848fSNigel Hislop (void __user *)(unsigned long) usrparm.psf_data, 3280ab1d848fSNigel Hislop usrparm.psf_data_len)) 3281ab1d848fSNigel Hislop goto out_free; 328252898025SNigel Hislop psf0 = psf_data[0]; 328352898025SNigel Hislop psf1 = psf_data[1]; 3284ab1d848fSNigel Hislop 3285ab1d848fSNigel Hislop /* setup CCWs for PSF + RSSD */ 328668b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device); 3287ab1d848fSNigel Hislop if (IS_ERR(cqr)) { 3288fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3289ab1d848fSNigel Hislop "Could not allocate initialization request"); 3290ab1d848fSNigel Hislop rc = PTR_ERR(cqr); 3291ab1d848fSNigel Hislop goto out_free; 3292ab1d848fSNigel Hislop } 3293ab1d848fSNigel Hislop 3294ab1d848fSNigel Hislop cqr->startdev = device; 3295ab1d848fSNigel Hislop cqr->memdev = device; 3296ab1d848fSNigel Hislop cqr->retries = 3; 3297ab1d848fSNigel Hislop cqr->expires = 10 * HZ; 3298ab1d848fSNigel Hislop cqr->buildclk = get_clock(); 3299ab1d848fSNigel Hislop cqr->status = DASD_CQR_FILLED; 3300ab1d848fSNigel Hislop 3301ab1d848fSNigel Hislop /* Build the ccws */ 3302ab1d848fSNigel Hislop ccw = cqr->cpaddr; 3303ab1d848fSNigel Hislop 3304ab1d848fSNigel Hislop /* PSF ccw */ 3305ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_PSF; 3306ab1d848fSNigel Hislop ccw->count = usrparm.psf_data_len; 3307ab1d848fSNigel Hislop ccw->flags |= CCW_FLAG_CC; 3308ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) psf_data; 3309ab1d848fSNigel Hislop 3310ab1d848fSNigel Hislop ccw++; 3311ab1d848fSNigel Hislop 3312ab1d848fSNigel Hislop /* RSSD ccw */ 3313ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_RSSD; 3314ab1d848fSNigel Hislop ccw->count = usrparm.rssd_result_len; 3315ab1d848fSNigel Hislop ccw->flags = CCW_FLAG_SLI ; 3316ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) rssd_result; 3317ab1d848fSNigel Hislop 3318ab1d848fSNigel Hislop rc = dasd_sleep_on(cqr); 3319ab1d848fSNigel Hislop if (rc) 3320ab1d848fSNigel Hislop goto out_sfree; 3321ab1d848fSNigel Hislop 3322ab1d848fSNigel Hislop rc = -EFAULT; 3323ab1d848fSNigel Hislop if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 3324ab1d848fSNigel Hislop rssd_result, usrparm.rssd_result_len)) 3325ab1d848fSNigel Hislop goto out_sfree; 3326ab1d848fSNigel Hislop rc = 0; 3327ab1d848fSNigel Hislop 3328ab1d848fSNigel Hislop out_sfree: 3329ab1d848fSNigel Hislop dasd_sfree_request(cqr, cqr->memdev); 3330ab1d848fSNigel Hislop out_free: 3331ab1d848fSNigel Hislop kfree(rssd_result); 3332ab1d848fSNigel Hislop kfree(psf_data); 3333ab1d848fSNigel Hislop out: 333452898025SNigel Hislop DBF_DEV_EVENT(DBF_WARNING, device, 333552898025SNigel Hislop "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", 333652898025SNigel Hislop (int) psf0, (int) psf1, rc); 3337ab1d848fSNigel Hislop return rc; 3338ab1d848fSNigel Hislop } 3339ab1d848fSNigel Hislop 33401107ccfbSChristoph Hellwig static int 33418e09f215SStefan Weinhuber dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 33421107ccfbSChristoph Hellwig { 33438e09f215SStefan Weinhuber struct dasd_device *device = block->base; 33448e09f215SStefan Weinhuber 33451107ccfbSChristoph Hellwig switch (cmd) { 33461107ccfbSChristoph Hellwig case BIODASDGATTR: 33471107ccfbSChristoph Hellwig return dasd_eckd_get_attrib(device, argp); 33481107ccfbSChristoph Hellwig case BIODASDSATTR: 33491107ccfbSChristoph Hellwig return dasd_eckd_set_attrib(device, argp); 33501107ccfbSChristoph Hellwig case BIODASDPSRD: 33511107ccfbSChristoph Hellwig return dasd_eckd_performance(device, argp); 33521107ccfbSChristoph Hellwig case BIODASDRLSE: 33531107ccfbSChristoph Hellwig return dasd_eckd_release(device); 33541107ccfbSChristoph Hellwig case BIODASDRSRV: 33551107ccfbSChristoph Hellwig return dasd_eckd_reserve(device); 33561107ccfbSChristoph Hellwig case BIODASDSLCK: 33571107ccfbSChristoph Hellwig return dasd_eckd_steal_lock(device); 3358196339f1SStefan Weinhuber case BIODASDSNID: 3359196339f1SStefan Weinhuber return dasd_eckd_snid(device, argp); 3360ab1d848fSNigel Hislop case BIODASDSYMMIO: 3361ab1d848fSNigel Hislop return dasd_symm_io(device, argp); 33621107ccfbSChristoph Hellwig default: 33631107ccfbSChristoph Hellwig return -ENOIOCTLCMD; 33641107ccfbSChristoph Hellwig } 33651107ccfbSChristoph Hellwig } 33661107ccfbSChristoph Hellwig 33671da177e4SLinus Torvalds /* 3368445b5b49SHorst Hummel * Dump the range of CCWs into 'page' buffer 3369445b5b49SHorst Hummel * and return number of printed chars. 3370445b5b49SHorst Hummel */ 33714d284cacSHeiko Carstens static int 3372445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 3373445b5b49SHorst Hummel { 3374445b5b49SHorst Hummel int len, count; 3375445b5b49SHorst Hummel char *datap; 3376445b5b49SHorst Hummel 3377445b5b49SHorst Hummel len = 0; 3378445b5b49SHorst Hummel while (from <= to) { 3379445b5b49SHorst Hummel len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3380445b5b49SHorst Hummel " CCW %p: %08X %08X DAT:", 3381445b5b49SHorst Hummel from, ((int *) from)[0], ((int *) from)[1]); 3382445b5b49SHorst Hummel 3383445b5b49SHorst Hummel /* get pointer to data (consider IDALs) */ 3384445b5b49SHorst Hummel if (from->flags & CCW_FLAG_IDA) 3385445b5b49SHorst Hummel datap = (char *) *((addr_t *) (addr_t) from->cda); 3386445b5b49SHorst Hummel else 3387445b5b49SHorst Hummel datap = (char *) ((addr_t) from->cda); 3388445b5b49SHorst Hummel 3389445b5b49SHorst Hummel /* dump data (max 32 bytes) */ 3390445b5b49SHorst Hummel for (count = 0; count < from->count && count < 32; count++) { 3391445b5b49SHorst Hummel if (count % 8 == 0) len += sprintf(page + len, " "); 3392445b5b49SHorst Hummel if (count % 4 == 0) len += sprintf(page + len, " "); 3393445b5b49SHorst Hummel len += sprintf(page + len, "%02x", datap[count]); 3394445b5b49SHorst Hummel } 3395445b5b49SHorst Hummel len += sprintf(page + len, "\n"); 3396445b5b49SHorst Hummel from++; 3397445b5b49SHorst Hummel } 3398445b5b49SHorst Hummel return len; 3399445b5b49SHorst Hummel } 3400445b5b49SHorst Hummel 3401fc19f381SStefan Haberland static void 3402aeec92caSStefan Haberland dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 3403aeec92caSStefan Haberland char *reason) 3404fc19f381SStefan Haberland { 3405fc19f381SStefan Haberland u64 *sense; 3406a5a0061fSStefan Weinhuber u64 *stat; 3407fc19f381SStefan Haberland 3408aeec92caSStefan Haberland sense = (u64 *) dasd_get_sense(irb); 3409a5a0061fSStefan Weinhuber stat = (u64 *) &irb->scsw; 3410fc19f381SStefan Haberland if (sense) { 3411a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " 3412a5a0061fSStefan Weinhuber "%016llx %016llx %016llx %016llx", 3413a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 3414ed3640b2SStefan Haberland sense[0], sense[1], sense[2], sense[3]); 3415fc19f381SStefan Haberland } else { 3416a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", 3417a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 3418a5a0061fSStefan Weinhuber "NO VALID SENSE"); 3419fc19f381SStefan Haberland } 3420fc19f381SStefan Haberland } 3421fc19f381SStefan Haberland 3422445b5b49SHorst Hummel /* 34231da177e4SLinus Torvalds * Print sense data and related channel program. 34241da177e4SLinus Torvalds * Parts are printed because printk buffer is only 1024 bytes. 34251da177e4SLinus Torvalds */ 3426f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 34278e09f215SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 34281da177e4SLinus Torvalds { 34291da177e4SLinus Torvalds char *page; 3430445b5b49SHorst Hummel struct ccw1 *first, *last, *fail, *from, *to; 3431445b5b49SHorst Hummel int len, sl, sct; 34321da177e4SLinus Torvalds 34331da177e4SLinus Torvalds page = (char *) get_zeroed_page(GFP_ATOMIC); 34341da177e4SLinus Torvalds if (page == NULL) { 3435fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 3436fc19f381SStefan Haberland "No memory to dump sense data\n"); 34371da177e4SLinus Torvalds return; 34381da177e4SLinus Torvalds } 3439445b5b49SHorst Hummel /* dump the sense data */ 34401da177e4SLinus Torvalds len = sprintf(page, KERN_ERR PRINTK_HEADER 34411da177e4SLinus Torvalds " I/O status report for device %s:\n", 34422a0217d5SKay Sievers dev_name(&device->cdev->dev)); 34431da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3444a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 3445a5a0061fSStefan Weinhuber "CS:%02X RC:%d\n", 3446a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 3447a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 3448a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 3449a5a0061fSStefan Weinhuber req ? req->intrc : 0); 34501da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 34511da177e4SLinus Torvalds " device %s: Failing CCW: %p\n", 34522a0217d5SKay Sievers dev_name(&device->cdev->dev), 345323d805b6SPeter Oberparleiter (void *) (addr_t) irb->scsw.cmd.cpa); 34541da177e4SLinus Torvalds if (irb->esw.esw0.erw.cons) { 34551da177e4SLinus Torvalds for (sl = 0; sl < 4; sl++) { 34561da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER 34571da177e4SLinus Torvalds " Sense(hex) %2d-%2d:", 34581da177e4SLinus Torvalds (8 * sl), ((8 * sl) + 7)); 34591da177e4SLinus Torvalds 34601da177e4SLinus Torvalds for (sct = 0; sct < 8; sct++) { 34611da177e4SLinus Torvalds len += sprintf(page + len, " %02x", 34621da177e4SLinus Torvalds irb->ecw[8 * sl + sct]); 34631da177e4SLinus Torvalds } 34641da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 34651da177e4SLinus Torvalds } 34661da177e4SLinus Torvalds 34671da177e4SLinus Torvalds if (irb->ecw[27] & DASD_SENSE_BIT_0) { 34681da177e4SLinus Torvalds /* 24 Byte Sense Data */ 3469445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 34701da177e4SLinus Torvalds " 24 Byte: %x MSG %x, " 34711da177e4SLinus Torvalds "%s MSGb to SYSOP\n", 34721da177e4SLinus Torvalds irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 34731da177e4SLinus Torvalds irb->ecw[1] & 0x10 ? "" : "no"); 34741da177e4SLinus Torvalds } else { 34751da177e4SLinus Torvalds /* 32 Byte Sense Data */ 3476445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 34771da177e4SLinus Torvalds " 32 Byte: Format: %x " 34781da177e4SLinus Torvalds "Exception class %x\n", 34791da177e4SLinus Torvalds irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 34801da177e4SLinus Torvalds } 34811da177e4SLinus Torvalds } else { 3482445b5b49SHorst Hummel sprintf(page + len, KERN_ERR PRINTK_HEADER 34831da177e4SLinus Torvalds " SORRY - NO VALID SENSE AVAILABLE\n"); 34841da177e4SLinus Torvalds } 3485445b5b49SHorst Hummel printk("%s", page); 34861da177e4SLinus Torvalds 34878e09f215SStefan Weinhuber if (req) { 34888e09f215SStefan Weinhuber /* req == NULL for unsolicited interrupts */ 3489445b5b49SHorst Hummel /* dump the Channel Program (max 140 Bytes per line) */ 3490445b5b49SHorst Hummel /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 3491445b5b49SHorst Hummel first = req->cpaddr; 3492445b5b49SHorst Hummel for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 3493445b5b49SHorst Hummel to = min(first + 6, last); 34941da177e4SLinus Torvalds len = sprintf(page, KERN_ERR PRINTK_HEADER 34951da177e4SLinus Torvalds " Related CP in req: %p\n", req); 3496445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(first, to, page + len); 3497445b5b49SHorst Hummel printk("%s", page); 34981da177e4SLinus Torvalds 3499445b5b49SHorst Hummel /* print failing CCW area (maximum 4) */ 3500445b5b49SHorst Hummel /* scsw->cda is either valid or zero */ 35011da177e4SLinus Torvalds len = 0; 3502445b5b49SHorst Hummel from = ++to; 350323d805b6SPeter Oberparleiter fail = (struct ccw1 *)(addr_t) 350423d805b6SPeter Oberparleiter irb->scsw.cmd.cpa; /* failing CCW */ 3505445b5b49SHorst Hummel if (from < fail - 2) { 3506445b5b49SHorst Hummel from = fail - 2; /* there is a gap - print header */ 3507445b5b49SHorst Hummel len += sprintf(page, KERN_ERR PRINTK_HEADER "......\n"); 35081da177e4SLinus Torvalds } 3509445b5b49SHorst Hummel to = min(fail + 1, last); 3510445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, to, page + len); 35111da177e4SLinus Torvalds 3512445b5b49SHorst Hummel /* print last CCWs (maximum 2) */ 3513445b5b49SHorst Hummel from = max(from, ++to); 3514445b5b49SHorst Hummel if (from < last - 1) { 3515445b5b49SHorst Hummel from = last - 1; /* there is a gap - print header */ 35161da177e4SLinus Torvalds len += sprintf(page + len, KERN_ERR PRINTK_HEADER "......\n"); 35171da177e4SLinus Torvalds } 3518445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, last, page + len); 35191da177e4SLinus Torvalds if (len > 0) 3520445b5b49SHorst Hummel printk("%s", page); 35218e09f215SStefan Weinhuber } 35221da177e4SLinus Torvalds free_page((unsigned long) page); 35231da177e4SLinus Torvalds } 35241da177e4SLinus Torvalds 3525f3eb5384SStefan Weinhuber 3526f3eb5384SStefan Weinhuber /* 3527f3eb5384SStefan Weinhuber * Print sense data from a tcw. 3528f3eb5384SStefan Weinhuber */ 3529f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 3530f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 3531f3eb5384SStefan Weinhuber { 3532f3eb5384SStefan Weinhuber char *page; 3533f3eb5384SStefan Weinhuber int len, sl, sct, residual; 3534f3eb5384SStefan Weinhuber struct tsb *tsb; 3535ef19298bSStefan Weinhuber u8 *sense, *rcq; 3536f3eb5384SStefan Weinhuber 3537f3eb5384SStefan Weinhuber page = (char *) get_zeroed_page(GFP_ATOMIC); 3538f3eb5384SStefan Weinhuber if (page == NULL) { 3539fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, " %s", 3540f3eb5384SStefan Weinhuber "No memory to dump sense data"); 3541f3eb5384SStefan Weinhuber return; 3542f3eb5384SStefan Weinhuber } 3543f3eb5384SStefan Weinhuber /* dump the sense data */ 3544f3eb5384SStefan Weinhuber len = sprintf(page, KERN_ERR PRINTK_HEADER 3545f3eb5384SStefan Weinhuber " I/O status report for device %s:\n", 3546f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev)); 3547f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3548a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 3549a5a0061fSStefan Weinhuber "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", 3550a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 3551a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 3552a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 3553a5a0061fSStefan Weinhuber irb->scsw.tm.fcxs, irb->scsw.tm.schxs, 3554a5a0061fSStefan Weinhuber req ? req->intrc : 0); 3555f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3556f3eb5384SStefan Weinhuber " device %s: Failing TCW: %p\n", 3557f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev), 3558f3eb5384SStefan Weinhuber (void *) (addr_t) irb->scsw.tm.tcw); 3559f3eb5384SStefan Weinhuber 3560f3eb5384SStefan Weinhuber tsb = NULL; 3561f3eb5384SStefan Weinhuber sense = NULL; 3562a5a0061fSStefan Weinhuber if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) 3563f3eb5384SStefan Weinhuber tsb = tcw_get_tsb( 3564f3eb5384SStefan Weinhuber (struct tcw *)(unsigned long)irb->scsw.tm.tcw); 3565f3eb5384SStefan Weinhuber 3566b8fde722SStefan Haberland if (tsb) { 3567f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3568f3eb5384SStefan Weinhuber " tsb->length %d\n", tsb->length); 3569f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3570f3eb5384SStefan Weinhuber " tsb->flags %x\n", tsb->flags); 3571f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3572f3eb5384SStefan Weinhuber " tsb->dcw_offset %d\n", tsb->dcw_offset); 3573f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3574f3eb5384SStefan Weinhuber " tsb->count %d\n", tsb->count); 3575f3eb5384SStefan Weinhuber residual = tsb->count - 28; 3576f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3577f3eb5384SStefan Weinhuber " residual %d\n", residual); 3578f3eb5384SStefan Weinhuber 3579f3eb5384SStefan Weinhuber switch (tsb->flags & 0x07) { 3580f3eb5384SStefan Weinhuber case 1: /* tsa_iostat */ 3581f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3582f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_time %d\n", 3583f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_time); 3584f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3585f3eb5384SStefan Weinhuber " tsb->tsa.iostat.def_time %d\n", 3586f3eb5384SStefan Weinhuber tsb->tsa.iostat.def_time); 3587f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3588f3eb5384SStefan Weinhuber " tsb->tsa.iostat.queue_time %d\n", 3589f3eb5384SStefan Weinhuber tsb->tsa.iostat.queue_time); 3590f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3591f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_busy_time %d\n", 3592f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_busy_time); 3593f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3594f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_act_time %d\n", 3595f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_act_time); 3596f3eb5384SStefan Weinhuber sense = tsb->tsa.iostat.sense; 3597f3eb5384SStefan Weinhuber break; 3598f3eb5384SStefan Weinhuber case 2: /* ts_ddpc */ 3599f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3600f3eb5384SStefan Weinhuber " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); 3601ef19298bSStefan Weinhuber for (sl = 0; sl < 2; sl++) { 3602ef19298bSStefan Weinhuber len += sprintf(page + len, 3603ef19298bSStefan Weinhuber KERN_ERR PRINTK_HEADER 3604ef19298bSStefan Weinhuber " tsb->tsa.ddpc.rcq %2d-%2d: ", 3605ef19298bSStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 3606ef19298bSStefan Weinhuber rcq = tsb->tsa.ddpc.rcq; 3607f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 3608f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 3609ef19298bSStefan Weinhuber rcq[8 * sl + sct]); 3610f3eb5384SStefan Weinhuber } 3611f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 3612f3eb5384SStefan Weinhuber } 3613f3eb5384SStefan Weinhuber sense = tsb->tsa.ddpc.sense; 3614f3eb5384SStefan Weinhuber break; 3615f3eb5384SStefan Weinhuber case 3: /* tsa_intrg */ 3616f3eb5384SStefan Weinhuber len += sprintf(page + len, KERN_ERR PRINTK_HEADER 3617f3eb5384SStefan Weinhuber " tsb->tsa.intrg.: not supportet yet \n"); 3618f3eb5384SStefan Weinhuber break; 3619f3eb5384SStefan Weinhuber } 3620f3eb5384SStefan Weinhuber 3621f3eb5384SStefan Weinhuber if (sense) { 3622f3eb5384SStefan Weinhuber for (sl = 0; sl < 4; sl++) { 3623f3eb5384SStefan Weinhuber len += sprintf(page + len, 3624f3eb5384SStefan Weinhuber KERN_ERR PRINTK_HEADER 3625f3eb5384SStefan Weinhuber " Sense(hex) %2d-%2d:", 3626f3eb5384SStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 3627f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 3628f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 3629f3eb5384SStefan Weinhuber sense[8 * sl + sct]); 3630f3eb5384SStefan Weinhuber } 3631f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 3632f3eb5384SStefan Weinhuber } 3633f3eb5384SStefan Weinhuber 3634f3eb5384SStefan Weinhuber if (sense[27] & DASD_SENSE_BIT_0) { 3635f3eb5384SStefan Weinhuber /* 24 Byte Sense Data */ 3636f3eb5384SStefan Weinhuber sprintf(page + len, KERN_ERR PRINTK_HEADER 3637f3eb5384SStefan Weinhuber " 24 Byte: %x MSG %x, " 3638f3eb5384SStefan Weinhuber "%s MSGb to SYSOP\n", 3639f3eb5384SStefan Weinhuber sense[7] >> 4, sense[7] & 0x0f, 3640f3eb5384SStefan Weinhuber sense[1] & 0x10 ? "" : "no"); 3641f3eb5384SStefan Weinhuber } else { 3642f3eb5384SStefan Weinhuber /* 32 Byte Sense Data */ 3643f3eb5384SStefan Weinhuber sprintf(page + len, KERN_ERR PRINTK_HEADER 3644f3eb5384SStefan Weinhuber " 32 Byte: Format: %x " 3645f3eb5384SStefan Weinhuber "Exception class %x\n", 3646f3eb5384SStefan Weinhuber sense[6] & 0x0f, sense[22] >> 4); 3647f3eb5384SStefan Weinhuber } 3648f3eb5384SStefan Weinhuber } else { 3649f3eb5384SStefan Weinhuber sprintf(page + len, KERN_ERR PRINTK_HEADER 3650f3eb5384SStefan Weinhuber " SORRY - NO VALID SENSE AVAILABLE\n"); 3651f3eb5384SStefan Weinhuber } 3652f3eb5384SStefan Weinhuber } else { 3653f3eb5384SStefan Weinhuber sprintf(page + len, KERN_ERR PRINTK_HEADER 3654f3eb5384SStefan Weinhuber " SORRY - NO TSB DATA AVAILABLE\n"); 3655f3eb5384SStefan Weinhuber } 3656f3eb5384SStefan Weinhuber printk("%s", page); 3657f3eb5384SStefan Weinhuber free_page((unsigned long) page); 3658f3eb5384SStefan Weinhuber } 3659f3eb5384SStefan Weinhuber 3660f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense(struct dasd_device *device, 3661f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 3662f3eb5384SStefan Weinhuber { 3663a5a0061fSStefan Weinhuber if (scsw_is_tm(&irb->scsw)) 3664f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_tcw(device, req, irb); 3665f3eb5384SStefan Weinhuber else 3666f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_ccw(device, req, irb); 3667f3eb5384SStefan Weinhuber } 3668f3eb5384SStefan Weinhuber 3669501183f2SStefan Haberland static int dasd_eckd_pm_freeze(struct dasd_device *device) 3670d41dd122SStefan Haberland { 3671d41dd122SStefan Haberland /* 3672d41dd122SStefan Haberland * the device should be disconnected from our LCU structure 3673d41dd122SStefan Haberland * on restore we will reconnect it and reread LCU specific 3674d41dd122SStefan Haberland * information like PAV support that might have changed 3675d41dd122SStefan Haberland */ 3676d41dd122SStefan Haberland dasd_alias_remove_device(device); 3677d41dd122SStefan Haberland dasd_alias_disconnect_device_from_lcu(device); 3678d41dd122SStefan Haberland 3679d41dd122SStefan Haberland return 0; 3680d41dd122SStefan Haberland } 3681d41dd122SStefan Haberland 3682501183f2SStefan Haberland static int dasd_eckd_restore_device(struct dasd_device *device) 3683d41dd122SStefan Haberland { 3684d41dd122SStefan Haberland struct dasd_eckd_private *private; 36856fca97a9SStefan Haberland struct dasd_eckd_characteristics temp_rdc_data; 3686d41dd122SStefan Haberland int is_known, rc; 3687d41dd122SStefan Haberland struct dasd_uid temp_uid; 3688a7602f6cSStefan Haberland unsigned long flags; 3689d41dd122SStefan Haberland 3690d41dd122SStefan Haberland private = (struct dasd_eckd_private *) device->private; 3691d41dd122SStefan Haberland 3692d41dd122SStefan Haberland /* Read Configuration Data */ 3693d41dd122SStefan Haberland rc = dasd_eckd_read_conf(device); 3694d41dd122SStefan Haberland if (rc) 3695d41dd122SStefan Haberland goto out_err; 3696d41dd122SStefan Haberland 36972dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 36982dedf0d9SStefan Haberland /* Generate device unique id */ 36992dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 37002dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 3701d41dd122SStefan Haberland if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) 3702a7602f6cSStefan Haberland dev_err(&device->cdev->dev, "The UID of the DASD has " 3703a7602f6cSStefan Haberland "changed\n"); 37042dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 3705d41dd122SStefan Haberland if (rc) 3706d41dd122SStefan Haberland goto out_err; 3707d41dd122SStefan Haberland 3708d41dd122SStefan Haberland /* register lcu with alias handling, enable PAV if this is a new lcu */ 3709d41dd122SStefan Haberland is_known = dasd_alias_make_device_known_to_lcu(device); 3710d41dd122SStefan Haberland if (is_known < 0) 3711d41dd122SStefan Haberland return is_known; 3712d41dd122SStefan Haberland if (!is_known) { 3713f4ac1d02SStefan Weinhuber dasd_eckd_validate_server(device); 3714f4ac1d02SStefan Weinhuber dasd_alias_lcu_setup_complete(device); 3715f4ac1d02SStefan Weinhuber } else 3716f4ac1d02SStefan Weinhuber dasd_alias_wait_for_lcu_setup(device); 3717f4ac1d02SStefan Weinhuber 3718f4ac1d02SStefan Weinhuber /* RE-Read Configuration Data */ 3719f4ac1d02SStefan Weinhuber rc = dasd_eckd_read_conf(device); 3720d41dd122SStefan Haberland if (rc) 3721d41dd122SStefan Haberland goto out_err; 3722d41dd122SStefan Haberland 3723d41dd122SStefan Haberland /* Read Feature Codes */ 372468d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 3725d41dd122SStefan Haberland 3726d41dd122SStefan Haberland /* Read Device Characteristics */ 372768b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 37286fca97a9SStefan Haberland &temp_rdc_data, 64); 3729d41dd122SStefan Haberland if (rc) { 3730b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 3731b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 3732d41dd122SStefan Haberland goto out_err; 3733d41dd122SStefan Haberland } 3734a7602f6cSStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 37356fca97a9SStefan Haberland memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data)); 3736a7602f6cSStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 3737d41dd122SStefan Haberland 3738d41dd122SStefan Haberland /* add device to alias management */ 3739d41dd122SStefan Haberland dasd_alias_add_device(device); 3740d41dd122SStefan Haberland 3741d41dd122SStefan Haberland return 0; 3742d41dd122SStefan Haberland 3743d41dd122SStefan Haberland out_err: 3744e6125fbaSStefan Haberland return -1; 3745d41dd122SStefan Haberland } 3746d41dd122SStefan Haberland 3747501183f2SStefan Haberland static int dasd_eckd_reload_device(struct dasd_device *device) 3748501183f2SStefan Haberland { 3749501183f2SStefan Haberland struct dasd_eckd_private *private; 3750501183f2SStefan Haberland int rc, old_base; 37512dedf0d9SStefan Haberland char print_uid[60]; 37522dedf0d9SStefan Haberland struct dasd_uid uid; 37532dedf0d9SStefan Haberland unsigned long flags; 3754501183f2SStefan Haberland 3755501183f2SStefan Haberland private = (struct dasd_eckd_private *) device->private; 37562dedf0d9SStefan Haberland 37572dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 3758501183f2SStefan Haberland old_base = private->uid.base_unit_addr; 37592dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 37602dedf0d9SStefan Haberland 3761501183f2SStefan Haberland /* Read Configuration Data */ 3762501183f2SStefan Haberland rc = dasd_eckd_read_conf(device); 3763501183f2SStefan Haberland if (rc) 3764501183f2SStefan Haberland goto out_err; 3765501183f2SStefan Haberland 37662dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 3767501183f2SStefan Haberland if (rc) 3768501183f2SStefan Haberland goto out_err; 3769501183f2SStefan Haberland /* 3770501183f2SStefan Haberland * update unit address configuration and 3771501183f2SStefan Haberland * add device to alias management 3772501183f2SStefan Haberland */ 3773501183f2SStefan Haberland dasd_alias_update_add_device(device); 3774501183f2SStefan Haberland 37752dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &uid); 37762dedf0d9SStefan Haberland 37772dedf0d9SStefan Haberland if (old_base != uid.base_unit_addr) { 37782dedf0d9SStefan Haberland if (strlen(uid.vduit) > 0) 37792dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 37802dedf0d9SStefan Haberland "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial, 37812dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr, uid.vduit); 3782501183f2SStefan Haberland else 37832dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 37842dedf0d9SStefan Haberland "%s.%s.%04x.%02x", uid.vendor, uid.serial, 37852dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr); 3786501183f2SStefan Haberland 3787501183f2SStefan Haberland dev_info(&device->cdev->dev, 3788501183f2SStefan Haberland "An Alias device was reassigned to a new base device " 37892dedf0d9SStefan Haberland "with UID: %s\n", print_uid); 3790501183f2SStefan Haberland } 3791501183f2SStefan Haberland return 0; 3792501183f2SStefan Haberland 3793501183f2SStefan Haberland out_err: 3794501183f2SStefan Haberland return -1; 3795501183f2SStefan Haberland } 3796501183f2SStefan Haberland 3797d41dd122SStefan Haberland static struct ccw_driver dasd_eckd_driver = { 3798d41dd122SStefan Haberland .name = "dasd-eckd", 3799d41dd122SStefan Haberland .owner = THIS_MODULE, 3800d41dd122SStefan Haberland .ids = dasd_eckd_ids, 3801d41dd122SStefan Haberland .probe = dasd_eckd_probe, 3802d41dd122SStefan Haberland .remove = dasd_generic_remove, 3803d41dd122SStefan Haberland .set_offline = dasd_generic_set_offline, 3804d41dd122SStefan Haberland .set_online = dasd_eckd_set_online, 3805d41dd122SStefan Haberland .notify = dasd_generic_notify, 3806a4d26c6aSStefan Weinhuber .path_event = dasd_generic_path_event, 3807d41dd122SStefan Haberland .freeze = dasd_generic_pm_freeze, 3808d41dd122SStefan Haberland .thaw = dasd_generic_restore_device, 3809d41dd122SStefan Haberland .restore = dasd_generic_restore_device, 3810a23ed009SStefan Haberland .uc_handler = dasd_generic_uc_handler, 3811d41dd122SStefan Haberland }; 3812f3eb5384SStefan Weinhuber 38131da177e4SLinus Torvalds /* 38141da177e4SLinus Torvalds * max_blocks is dependent on the amount of storage that is available 38151da177e4SLinus Torvalds * in the static io buffer for each device. Currently each device has 38161da177e4SLinus Torvalds * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has 38171da177e4SLinus Torvalds * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use 38181da177e4SLinus Torvalds * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In 38191da177e4SLinus Torvalds * addition we have one define extent ccw + 16 bytes of data and one 38201da177e4SLinus Torvalds * locate record ccw + 16 bytes of data. That makes: 38211da177e4SLinus Torvalds * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. 38221da177e4SLinus Torvalds * We want to fit two into the available memory so that we can immediately 38231da177e4SLinus Torvalds * start the next request if one finishes off. That makes 249.5 blocks 38241da177e4SLinus Torvalds * for one request. Give a little safety and the result is 240. 38251da177e4SLinus Torvalds */ 38261da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline = { 38271da177e4SLinus Torvalds .owner = THIS_MODULE, 38281da177e4SLinus Torvalds .name = "ECKD", 38291da177e4SLinus Torvalds .ebcname = "ECKD", 3830ef19298bSStefan Weinhuber .max_blocks = 190, 38311da177e4SLinus Torvalds .check_device = dasd_eckd_check_characteristics, 38328e09f215SStefan Weinhuber .uncheck_device = dasd_eckd_uncheck_device, 38331da177e4SLinus Torvalds .do_analysis = dasd_eckd_do_analysis, 3834a4d26c6aSStefan Weinhuber .verify_path = dasd_eckd_verify_path, 38358e09f215SStefan Weinhuber .ready_to_online = dasd_eckd_ready_to_online, 38368e09f215SStefan Weinhuber .online_to_ready = dasd_eckd_online_to_ready, 38371da177e4SLinus Torvalds .fill_geometry = dasd_eckd_fill_geometry, 38381da177e4SLinus Torvalds .start_IO = dasd_start_IO, 38391da177e4SLinus Torvalds .term_IO = dasd_term_IO, 38408e09f215SStefan Weinhuber .handle_terminated_request = dasd_eckd_handle_terminated_request, 38411da177e4SLinus Torvalds .format_device = dasd_eckd_format_device, 38421da177e4SLinus Torvalds .erp_action = dasd_eckd_erp_action, 38431da177e4SLinus Torvalds .erp_postaction = dasd_eckd_erp_postaction, 38445a27e60dSStefan Weinhuber .check_for_device_change = dasd_eckd_check_for_device_change, 38458e09f215SStefan Weinhuber .build_cp = dasd_eckd_build_alias_cp, 38468e09f215SStefan Weinhuber .free_cp = dasd_eckd_free_alias_cp, 38471da177e4SLinus Torvalds .dump_sense = dasd_eckd_dump_sense, 3848fc19f381SStefan Haberland .dump_sense_dbf = dasd_eckd_dump_sense_dbf, 38491da177e4SLinus Torvalds .fill_info = dasd_eckd_fill_info, 38501107ccfbSChristoph Hellwig .ioctl = dasd_eckd_ioctl, 3851d41dd122SStefan Haberland .freeze = dasd_eckd_pm_freeze, 3852d41dd122SStefan Haberland .restore = dasd_eckd_restore_device, 3853501183f2SStefan Haberland .reload = dasd_eckd_reload_device, 38542dedf0d9SStefan Haberland .get_uid = dasd_eckd_get_uid, 38551da177e4SLinus Torvalds }; 38561da177e4SLinus Torvalds 38571da177e4SLinus Torvalds static int __init 38581da177e4SLinus Torvalds dasd_eckd_init(void) 38591da177e4SLinus Torvalds { 3860736e6ea0SSebastian Ott int ret; 3861736e6ea0SSebastian Ott 38621da177e4SLinus Torvalds ASCEBC(dasd_eckd_discipline.ebcname, 4); 3863f932bceaSStefan Weinhuber dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), 3864f932bceaSStefan Weinhuber GFP_KERNEL | GFP_DMA); 3865f932bceaSStefan Weinhuber if (!dasd_reserve_req) 3866f932bceaSStefan Weinhuber return -ENOMEM; 3867a4d26c6aSStefan Weinhuber path_verification_worker = kmalloc(sizeof(*path_verification_worker), 3868a4d26c6aSStefan Weinhuber GFP_KERNEL | GFP_DMA); 3869a4d26c6aSStefan Weinhuber if (!path_verification_worker) { 3870a4d26c6aSStefan Weinhuber kfree(dasd_reserve_req); 3871a4d26c6aSStefan Weinhuber return -ENOMEM; 3872a4d26c6aSStefan Weinhuber } 3873736e6ea0SSebastian Ott ret = ccw_driver_register(&dasd_eckd_driver); 3874736e6ea0SSebastian Ott if (!ret) 3875736e6ea0SSebastian Ott wait_for_device_probe(); 3876a4d26c6aSStefan Weinhuber else { 3877a4d26c6aSStefan Weinhuber kfree(path_verification_worker); 3878f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 3879a4d26c6aSStefan Weinhuber } 3880736e6ea0SSebastian Ott return ret; 38811da177e4SLinus Torvalds } 38821da177e4SLinus Torvalds 38831da177e4SLinus Torvalds static void __exit 38841da177e4SLinus Torvalds dasd_eckd_cleanup(void) 38851da177e4SLinus Torvalds { 38861da177e4SLinus Torvalds ccw_driver_unregister(&dasd_eckd_driver); 3887a4d26c6aSStefan Weinhuber kfree(path_verification_worker); 3888f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 38891da177e4SLinus Torvalds } 38901da177e4SLinus Torvalds 38911da177e4SLinus Torvalds module_init(dasd_eckd_init); 38921da177e4SLinus Torvalds module_exit(dasd_eckd_cleanup); 3893