16a55d2cdSGreg Kroah-Hartman // SPDX-License-Identifier: GPL-2.0 21da177e4SLinus Torvalds /* 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> 21048cd4e5SHeiko Carstens #include <linux/compat.h> 221da177e4SLinus Torvalds #include <linux/init.h> 235a3b7b11SStefan Haberland #include <linux/seq_file.h> 241da177e4SLinus Torvalds 25382b7366SSebastian Ott #include <asm/css_chars.h> 261da177e4SLinus Torvalds #include <asm/debug.h> 271da177e4SLinus Torvalds #include <asm/idals.h> 281da177e4SLinus Torvalds #include <asm/ebcdic.h> 291da177e4SLinus Torvalds #include <asm/io.h> 307c0f6ba6SLinus Torvalds #include <linux/uaccess.h> 3140545573SHorst Hummel #include <asm/cio.h> 321da177e4SLinus Torvalds #include <asm/ccwdev.h> 33f3eb5384SStefan Weinhuber #include <asm/itcw.h> 345db8440cSStefan Haberland #include <asm/schid.h> 355db8440cSStefan Haberland #include <asm/chpid.h> 361da177e4SLinus Torvalds 371da177e4SLinus Torvalds #include "dasd_int.h" 381da177e4SLinus Torvalds #include "dasd_eckd.h" 391da177e4SLinus Torvalds 401da177e4SLinus Torvalds #ifdef PRINTK_HEADER 411da177e4SLinus Torvalds #undef PRINTK_HEADER 421da177e4SLinus Torvalds #endif /* PRINTK_HEADER */ 431da177e4SLinus Torvalds #define PRINTK_HEADER "dasd(eckd):" 441da177e4SLinus Torvalds 451da177e4SLinus Torvalds #define ECKD_C0(i) (i->home_bytes) 461da177e4SLinus Torvalds #define ECKD_F(i) (i->formula) 471da177e4SLinus Torvalds #define ECKD_F1(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f1):\ 481da177e4SLinus Torvalds (i->factors.f_0x02.f1)) 491da177e4SLinus Torvalds #define ECKD_F2(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f2):\ 501da177e4SLinus Torvalds (i->factors.f_0x02.f2)) 511da177e4SLinus Torvalds #define ECKD_F3(i) (ECKD_F(i)==0x01?(i->factors.f_0x01.f3):\ 521da177e4SLinus Torvalds (i->factors.f_0x02.f3)) 531da177e4SLinus Torvalds #define ECKD_F4(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f4):0) 541da177e4SLinus Torvalds #define ECKD_F5(i) (ECKD_F(i)==0x02?(i->factors.f_0x02.f5):0) 551da177e4SLinus Torvalds #define ECKD_F6(i) (i->factor6) 561da177e4SLinus Torvalds #define ECKD_F7(i) (i->factor7) 571da177e4SLinus Torvalds #define ECKD_F8(i) (i->factor8) 581da177e4SLinus Torvalds 59e4dbb0f2SStefan Haberland /* 60e4dbb0f2SStefan Haberland * raw track access always map to 64k in memory 61e4dbb0f2SStefan Haberland * so it maps to 16 blocks of 4k per track 62e4dbb0f2SStefan Haberland */ 63e4dbb0f2SStefan Haberland #define DASD_RAW_BLOCK_PER_TRACK 16 64e4dbb0f2SStefan Haberland #define DASD_RAW_BLOCKSIZE 4096 65e4dbb0f2SStefan Haberland /* 64k are 128 x 512 byte sectors */ 66e4dbb0f2SStefan Haberland #define DASD_RAW_SECTORS_PER_TRACK 128 67e4dbb0f2SStefan Haberland 681da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 691da177e4SLinus Torvalds 701da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline; 711da177e4SLinus Torvalds 721da177e4SLinus Torvalds /* The ccw bus type uses this table to find devices that it sends to 731da177e4SLinus Torvalds * dasd_eckd_probe */ 741da177e4SLinus Torvalds static struct ccw_device_id dasd_eckd_ids[] = { 75d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1}, 76d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2}, 775da24b76SStefan Haberland { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3380, 0), .driver_info = 0x3}, 78d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4}, 79d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5}, 80d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6}, 81d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7}, 82d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8}, 83d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9}, 84d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa}, 851da177e4SLinus Torvalds { /* end of list */ }, 861da177e4SLinus Torvalds }; 871da177e4SLinus Torvalds 881da177e4SLinus Torvalds MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids); 891da177e4SLinus Torvalds 901da177e4SLinus Torvalds static struct ccw_driver dasd_eckd_driver; /* see below */ 911da177e4SLinus Torvalds 92558b9ef0SStefan Weinhuber static void *rawpadpage; 93558b9ef0SStefan Weinhuber 94eb6e199bSStefan Weinhuber #define INIT_CQR_OK 0 95eb6e199bSStefan Weinhuber #define INIT_CQR_UNFORMATTED 1 96eb6e199bSStefan Weinhuber #define INIT_CQR_ERROR 2 97eb6e199bSStefan Weinhuber 98f932bceaSStefan Weinhuber /* emergency request for reserve/release */ 99f932bceaSStefan Weinhuber static struct { 100f932bceaSStefan Weinhuber struct dasd_ccw_req cqr; 101f932bceaSStefan Weinhuber struct ccw1 ccw; 102f932bceaSStefan Weinhuber char data[32]; 103f932bceaSStefan Weinhuber } *dasd_reserve_req; 104f932bceaSStefan Weinhuber static DEFINE_MUTEX(dasd_reserve_mutex); 105f932bceaSStefan Weinhuber 106a4d26c6aSStefan Weinhuber /* definitions for the path verification worker */ 107a4d26c6aSStefan Weinhuber struct path_verification_work_data { 108a4d26c6aSStefan Weinhuber struct work_struct worker; 109a4d26c6aSStefan Weinhuber struct dasd_device *device; 110a4d26c6aSStefan Weinhuber struct dasd_ccw_req cqr; 111a4d26c6aSStefan Weinhuber struct ccw1 ccw; 112a4d26c6aSStefan Weinhuber __u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE]; 113a4d26c6aSStefan Weinhuber int isglobal; 114a4d26c6aSStefan Weinhuber __u8 tbvpm; 115a4d26c6aSStefan Weinhuber }; 116a4d26c6aSStefan Weinhuber static struct path_verification_work_data *path_verification_worker; 117a4d26c6aSStefan Weinhuber static DEFINE_MUTEX(dasd_path_verification_mutex); 118eb6e199bSStefan Weinhuber 1195db8440cSStefan Haberland struct check_attention_work_data { 1205db8440cSStefan Haberland struct work_struct worker; 1215db8440cSStefan Haberland struct dasd_device *device; 1225db8440cSStefan Haberland __u8 lpum; 1235db8440cSStefan Haberland }; 1245db8440cSStefan Haberland 1258fd57520SJan Höppner static int prepare_itcw(struct itcw *, unsigned int, unsigned int, int, 1268fd57520SJan Höppner struct dasd_device *, struct dasd_device *, 1278fd57520SJan Höppner unsigned int, int, unsigned int, unsigned int, 1288fd57520SJan Höppner unsigned int, unsigned int); 1298fd57520SJan Höppner 1301da177e4SLinus Torvalds /* initial attempt at a probe function. this can be simplified once 1311da177e4SLinus Torvalds * the other detection code is gone */ 1321da177e4SLinus Torvalds static int 1331da177e4SLinus Torvalds dasd_eckd_probe (struct ccw_device *cdev) 1341da177e4SLinus Torvalds { 1351da177e4SLinus Torvalds int ret; 1361da177e4SLinus Torvalds 13740545573SHorst Hummel /* set ECKD specific ccw-device options */ 138454e1fa1SPeter Oberparleiter ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE | 139454e1fa1SPeter Oberparleiter CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH); 14040545573SHorst Hummel if (ret) { 141b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s", 142b8ed5dd5SStefan Haberland "dasd_eckd_probe: could not set " 143b8ed5dd5SStefan Haberland "ccw-device options"); 1441da177e4SLinus Torvalds return ret; 14540545573SHorst Hummel } 14640545573SHorst Hummel ret = dasd_generic_probe(cdev, &dasd_eckd_discipline); 14740545573SHorst Hummel return ret; 1481da177e4SLinus Torvalds } 1491da177e4SLinus Torvalds 1501da177e4SLinus Torvalds static int 1511da177e4SLinus Torvalds dasd_eckd_set_online(struct ccw_device *cdev) 1521da177e4SLinus Torvalds { 1531da177e4SLinus Torvalds return dasd_generic_set_online(cdev, &dasd_eckd_discipline); 1541da177e4SLinus Torvalds } 1551da177e4SLinus Torvalds 1561da177e4SLinus Torvalds static const int sizes_trk0[] = { 28, 148, 84 }; 1571da177e4SLinus Torvalds #define LABEL_SIZE 140 1581da177e4SLinus Torvalds 1593bc9fef9SStefan Haberland /* head and record addresses of count_area read in analysis ccw */ 1603bc9fef9SStefan Haberland static const int count_area_head[] = { 0, 0, 0, 0, 2 }; 1613bc9fef9SStefan Haberland static const int count_area_rec[] = { 1, 2, 3, 4, 1 }; 1623bc9fef9SStefan Haberland 1631da177e4SLinus Torvalds static inline unsigned int 1641da177e4SLinus Torvalds round_up_multiple(unsigned int no, unsigned int mult) 1651da177e4SLinus Torvalds { 1661da177e4SLinus Torvalds int rem = no % mult; 1671da177e4SLinus Torvalds return (rem ? no - rem + mult : no); 1681da177e4SLinus Torvalds } 1691da177e4SLinus Torvalds 1701da177e4SLinus Torvalds static inline unsigned int 1711da177e4SLinus Torvalds ceil_quot(unsigned int d1, unsigned int d2) 1721da177e4SLinus Torvalds { 1731da177e4SLinus Torvalds return (d1 + (d2 - 1)) / d2; 1741da177e4SLinus Torvalds } 1751da177e4SLinus Torvalds 1764d284cacSHeiko Carstens static unsigned int 1771da177e4SLinus Torvalds recs_per_track(struct dasd_eckd_characteristics * rdc, 1781da177e4SLinus Torvalds unsigned int kl, unsigned int dl) 1791da177e4SLinus Torvalds { 1801da177e4SLinus Torvalds int dn, kn; 1811da177e4SLinus Torvalds 1821da177e4SLinus Torvalds switch (rdc->dev_type) { 1831da177e4SLinus Torvalds case 0x3380: 1841da177e4SLinus Torvalds if (kl) 1851da177e4SLinus Torvalds return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + 1861da177e4SLinus Torvalds ceil_quot(dl + 12, 32)); 1871da177e4SLinus Torvalds else 1881da177e4SLinus Torvalds return 1499 / (15 + ceil_quot(dl + 12, 32)); 1891da177e4SLinus Torvalds case 0x3390: 1901da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1911da177e4SLinus Torvalds if (kl) { 1921da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1931da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + 1941da177e4SLinus Torvalds 9 + ceil_quot(dl + 6 * dn, 34)); 1951da177e4SLinus Torvalds } else 1961da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); 1971da177e4SLinus Torvalds case 0x9345: 1981da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1991da177e4SLinus Torvalds if (kl) { 2001da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 2011da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + 2021da177e4SLinus Torvalds ceil_quot(dl + 6 * dn, 34)); 2031da177e4SLinus Torvalds } else 2041da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); 2051da177e4SLinus Torvalds } 2061da177e4SLinus Torvalds return 0; 2071da177e4SLinus Torvalds } 2081da177e4SLinus Torvalds 209b44b0ab3SStefan Weinhuber static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head) 210b44b0ab3SStefan Weinhuber { 211b44b0ab3SStefan Weinhuber geo->cyl = (__u16) cyl; 212b44b0ab3SStefan Weinhuber geo->head = cyl >> 16; 213b44b0ab3SStefan Weinhuber geo->head <<= 4; 214b44b0ab3SStefan Weinhuber geo->head |= head; 215b44b0ab3SStefan Weinhuber } 216b44b0ab3SStefan Weinhuber 2175628683cSStefan Haberland static int set_timestamp(struct ccw1 *ccw, struct DE_eckd_data *data, 2181da177e4SLinus Torvalds struct dasd_device *device) 2191da177e4SLinus Torvalds { 220543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 221d54853efSMartin Schwidefsky int rc; 2221da177e4SLinus Torvalds 2235628683cSStefan Haberland rc = get_phys_clock(&data->ep_sys_time); 2245628683cSStefan Haberland /* 2255628683cSStefan Haberland * Ignore return code if XRC is not supported or 2265628683cSStefan Haberland * sync clock is switched off 2275628683cSStefan Haberland */ 2285628683cSStefan Haberland if ((rc && !private->rdc_data.facilities.XRC_supported) || 2295628683cSStefan Haberland rc == -EOPNOTSUPP || rc == -EACCES) 230d54853efSMartin Schwidefsky return 0; 2311da177e4SLinus Torvalds 2321da177e4SLinus Torvalds /* switch on System Time Stamp - needed for XRC Support */ 2331da177e4SLinus Torvalds data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ 2341da177e4SLinus Torvalds data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ 2351da177e4SLinus Torvalds 23645f186beSJan Höppner if (ccw) { 23745f186beSJan Höppner ccw->count = sizeof(struct DE_eckd_data); 23845f186beSJan Höppner ccw->flags |= CCW_FLAG_SLI; 23945f186beSJan Höppner } 24045f186beSJan Höppner 241d54853efSMartin Schwidefsky return rc; 2421da177e4SLinus Torvalds } 2431da177e4SLinus Torvalds 2444d284cacSHeiko Carstens static int 245b44b0ab3SStefan Weinhuber define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk, 24645f186beSJan Höppner unsigned int totrk, int cmd, struct dasd_device *device, 24745f186beSJan Höppner int blksize) 2481da177e4SLinus Torvalds { 249543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 250b44b0ab3SStefan Weinhuber u16 heads, beghead, endhead; 25145f186beSJan Höppner u32 begcyl, endcyl; 252d54853efSMartin Schwidefsky int rc = 0; 2531da177e4SLinus Torvalds 25445f186beSJan Höppner if (ccw) { 2551da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; 2561da177e4SLinus Torvalds ccw->flags = 0; 2571da177e4SLinus Torvalds ccw->count = 16; 2581da177e4SLinus Torvalds ccw->cda = (__u32)__pa(data); 25945f186beSJan Höppner } 2601da177e4SLinus Torvalds 2611da177e4SLinus Torvalds memset(data, 0, sizeof(struct DE_eckd_data)); 2621da177e4SLinus Torvalds switch (cmd) { 2631da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 2641da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 2651da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 2661da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 2671da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 2681da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 2691da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 2701da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 2711da177e4SLinus Torvalds data->mask.perm = 0x1; 2721da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 2731da177e4SLinus Torvalds break; 2748fd57520SJan Höppner case DASD_ECKD_CCW_READ_COUNT: 2758fd57520SJan Höppner data->mask.perm = 0x1; 2768fd57520SJan Höppner data->attributes.operation = DASD_BYPASS_CACHE; 2778fd57520SJan Höppner break; 27845f186beSJan Höppner case DASD_ECKD_CCW_READ_TRACK: 27945f186beSJan Höppner case DASD_ECKD_CCW_READ_TRACK_DATA: 28045f186beSJan Höppner data->mask.perm = 0x1; 28145f186beSJan Höppner data->attributes.operation = private->attrib.operation; 28245f186beSJan Höppner data->blk_size = 0; 28345f186beSJan Höppner break; 2841da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 2851da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 2861da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 2871da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 2881da177e4SLinus Torvalds data->mask.perm = 0x02; 2891da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 2905628683cSStefan Haberland rc = set_timestamp(ccw, data, device); 2911da177e4SLinus Torvalds break; 2921da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 2931da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 2941da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 2955628683cSStefan Haberland rc = set_timestamp(ccw, data, device); 2961da177e4SLinus Torvalds break; 2971da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 2981da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 2991da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 3001da177e4SLinus Torvalds data->mask.perm = 0x3; 3011da177e4SLinus Torvalds data->mask.auth = 0x1; 3021da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 3035628683cSStefan Haberland rc = set_timestamp(ccw, data, device); 3041da177e4SLinus Torvalds break; 30545f186beSJan Höppner case DASD_ECKD_CCW_WRITE_FULL_TRACK: 30645f186beSJan Höppner data->mask.perm = 0x03; 30745f186beSJan Höppner data->attributes.operation = private->attrib.operation; 30845f186beSJan Höppner data->blk_size = 0; 30945f186beSJan Höppner break; 31045f186beSJan Höppner case DASD_ECKD_CCW_WRITE_TRACK_DATA: 31145f186beSJan Höppner data->mask.perm = 0x02; 31245f186beSJan Höppner data->attributes.operation = private->attrib.operation; 31345f186beSJan Höppner data->blk_size = blksize; 3145628683cSStefan Haberland rc = set_timestamp(ccw, data, device); 31545f186beSJan Höppner break; 3161da177e4SLinus Torvalds default: 317fc19f381SStefan Haberland dev_err(&device->cdev->dev, 318fc19f381SStefan Haberland "0x%x is not a known command\n", cmd); 3191da177e4SLinus Torvalds break; 3201da177e4SLinus Torvalds } 3211da177e4SLinus Torvalds 3221da177e4SLinus Torvalds data->attributes.mode = 0x3; /* ECKD */ 3231da177e4SLinus Torvalds 3241da177e4SLinus Torvalds if ((private->rdc_data.cu_type == 0x2105 || 3251da177e4SLinus Torvalds private->rdc_data.cu_type == 0x2107 || 3261da177e4SLinus Torvalds private->rdc_data.cu_type == 0x1750) 3271da177e4SLinus Torvalds && !(private->uses_cdl && trk < 2)) 3281da177e4SLinus Torvalds data->ga_extended |= 0x40; /* Regular Data Format Mode */ 3291da177e4SLinus Torvalds 330b44b0ab3SStefan Weinhuber heads = private->rdc_data.trk_per_cyl; 331b44b0ab3SStefan Weinhuber begcyl = trk / heads; 332b44b0ab3SStefan Weinhuber beghead = trk % heads; 333b44b0ab3SStefan Weinhuber endcyl = totrk / heads; 334b44b0ab3SStefan Weinhuber endhead = totrk % heads; 3351da177e4SLinus Torvalds 3361da177e4SLinus Torvalds /* check for sequential prestage - enhance cylinder range */ 3371da177e4SLinus Torvalds if (data->attributes.operation == DASD_SEQ_PRESTAGE || 3381da177e4SLinus Torvalds data->attributes.operation == DASD_SEQ_ACCESS) { 3391da177e4SLinus Torvalds 340b44b0ab3SStefan Weinhuber if (endcyl + private->attrib.nr_cyl < private->real_cyl) 341b44b0ab3SStefan Weinhuber endcyl += private->attrib.nr_cyl; 3421da177e4SLinus Torvalds else 343b44b0ab3SStefan Weinhuber endcyl = (private->real_cyl - 1); 3441da177e4SLinus Torvalds } 3451da177e4SLinus Torvalds 346b44b0ab3SStefan Weinhuber set_ch_t(&data->beg_ext, begcyl, beghead); 347b44b0ab3SStefan Weinhuber set_ch_t(&data->end_ext, endcyl, endhead); 348d54853efSMartin Schwidefsky return rc; 3491da177e4SLinus Torvalds } 3501da177e4SLinus Torvalds 3518e09f215SStefan Weinhuber 35245f186beSJan Höppner static void locate_record_ext(struct ccw1 *ccw, struct LRE_eckd_data *data, 35345f186beSJan Höppner unsigned int trk, unsigned int rec_on_trk, 35445f186beSJan Höppner int count, int cmd, struct dasd_device *device, 35545f186beSJan Höppner unsigned int reclen, unsigned int tlf) 356f3eb5384SStefan Weinhuber { 357543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 358f3eb5384SStefan Weinhuber int sector; 359f3eb5384SStefan Weinhuber int dn, d; 360f3eb5384SStefan Weinhuber 36145f186beSJan Höppner if (ccw) { 36245f186beSJan Höppner ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD_EXT; 36345f186beSJan Höppner ccw->flags = 0; 36445f186beSJan Höppner if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) 36545f186beSJan Höppner ccw->count = 22; 36645f186beSJan Höppner else 36745f186beSJan Höppner ccw->count = 20; 36845f186beSJan Höppner ccw->cda = (__u32)__pa(data); 36945f186beSJan Höppner } 37045f186beSJan Höppner 371f3eb5384SStefan Weinhuber memset(data, 0, sizeof(*data)); 372f3eb5384SStefan Weinhuber sector = 0; 373f3eb5384SStefan Weinhuber if (rec_on_trk) { 374f3eb5384SStefan Weinhuber switch (private->rdc_data.dev_type) { 375f3eb5384SStefan Weinhuber case 0x3390: 376f3eb5384SStefan Weinhuber dn = ceil_quot(reclen + 6, 232); 377f3eb5384SStefan Weinhuber d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 378f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 379f3eb5384SStefan Weinhuber break; 380f3eb5384SStefan Weinhuber case 0x3380: 381f3eb5384SStefan Weinhuber d = 7 + ceil_quot(reclen + 12, 32); 382f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 383f3eb5384SStefan Weinhuber break; 384f3eb5384SStefan Weinhuber } 385f3eb5384SStefan Weinhuber } 386f3eb5384SStefan Weinhuber data->sector = sector; 387f3eb5384SStefan Weinhuber /* note: meaning of count depends on the operation 388f3eb5384SStefan Weinhuber * for record based I/O it's the number of records, but for 389f3eb5384SStefan Weinhuber * track based I/O it's the number of tracks 390f3eb5384SStefan Weinhuber */ 391f3eb5384SStefan Weinhuber data->count = count; 392f3eb5384SStefan Weinhuber switch (cmd) { 393f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 394f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 395f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 396f3eb5384SStefan Weinhuber break; 397f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_HOME_ADDRESS: 398f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 399f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 400f3eb5384SStefan Weinhuber break; 401f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 402f3eb5384SStefan Weinhuber data->operation.orientation = 0x1; 403f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 404f3eb5384SStefan Weinhuber data->count++; 405f3eb5384SStefan Weinhuber break; 406f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_RECORD_ZERO: 407f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 408f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 409f3eb5384SStefan Weinhuber data->count++; 410f3eb5384SStefan Weinhuber break; 411f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE: 412f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_MT: 413f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD: 414f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD_MT: 415f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 416f3eb5384SStefan Weinhuber data->length = reclen; 417f3eb5384SStefan Weinhuber data->operation.operation = 0x01; 418f3eb5384SStefan Weinhuber break; 419f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD: 420f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD_MT: 421f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 422f3eb5384SStefan Weinhuber data->length = reclen; 423f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 424f3eb5384SStefan Weinhuber break; 425e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_WRITE_FULL_TRACK: 426e4dbb0f2SStefan Haberland data->operation.orientation = 0x0; 427e4dbb0f2SStefan Haberland data->operation.operation = 0x3F; 428e4dbb0f2SStefan Haberland data->extended_operation = 0x11; 429e4dbb0f2SStefan Haberland data->length = 0; 430e4dbb0f2SStefan Haberland data->extended_parameter_length = 0x02; 431e4dbb0f2SStefan Haberland if (data->count > 8) { 432e4dbb0f2SStefan Haberland data->extended_parameter[0] = 0xFF; 433e4dbb0f2SStefan Haberland data->extended_parameter[1] = 0xFF; 434e4dbb0f2SStefan Haberland data->extended_parameter[1] <<= (16 - count); 435e4dbb0f2SStefan Haberland } else { 436e4dbb0f2SStefan Haberland data->extended_parameter[0] = 0xFF; 437e4dbb0f2SStefan Haberland data->extended_parameter[0] <<= (8 - count); 438e4dbb0f2SStefan Haberland data->extended_parameter[1] = 0x00; 439e4dbb0f2SStefan Haberland } 440e4dbb0f2SStefan Haberland data->sector = 0xFF; 441e4dbb0f2SStefan Haberland break; 442f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 443f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 444f3eb5384SStefan Weinhuber data->length = reclen; /* not tlf, as one might think */ 445f3eb5384SStefan Weinhuber data->operation.operation = 0x3F; 446f3eb5384SStefan Weinhuber data->extended_operation = 0x23; 447f3eb5384SStefan Weinhuber break; 448f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ: 449f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_MT: 450f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_KD: 451f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_KD_MT: 452f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 453f3eb5384SStefan Weinhuber data->length = reclen; 454f3eb5384SStefan Weinhuber data->operation.operation = 0x06; 455f3eb5384SStefan Weinhuber break; 456f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD: 457f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD_MT: 458f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 459f3eb5384SStefan Weinhuber data->length = reclen; 460f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 461f3eb5384SStefan Weinhuber break; 462f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_COUNT: 463f3eb5384SStefan Weinhuber data->operation.operation = 0x06; 464f3eb5384SStefan Weinhuber break; 465e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_READ_TRACK: 466e4dbb0f2SStefan Haberland data->operation.orientation = 0x1; 467e4dbb0f2SStefan Haberland data->operation.operation = 0x0C; 468e4dbb0f2SStefan Haberland data->extended_parameter_length = 0; 469e4dbb0f2SStefan Haberland data->sector = 0xFF; 470e4dbb0f2SStefan Haberland break; 471f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 472f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 473f3eb5384SStefan Weinhuber data->length = tlf; 474f3eb5384SStefan Weinhuber data->operation.operation = 0x0C; 475f3eb5384SStefan Weinhuber break; 476f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_ERASE: 477f3eb5384SStefan Weinhuber data->length = reclen; 478f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 479f3eb5384SStefan Weinhuber data->operation.operation = 0x0b; 480f3eb5384SStefan Weinhuber break; 481f3eb5384SStefan Weinhuber default: 482f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, device, 483f3eb5384SStefan Weinhuber "fill LRE unknown opcode 0x%x", cmd); 484f3eb5384SStefan Weinhuber BUG(); 485f3eb5384SStefan Weinhuber } 486f3eb5384SStefan Weinhuber set_ch_t(&data->seek_addr, 487f3eb5384SStefan Weinhuber trk / private->rdc_data.trk_per_cyl, 488f3eb5384SStefan Weinhuber trk % private->rdc_data.trk_per_cyl); 489f3eb5384SStefan Weinhuber data->search_arg.cyl = data->seek_addr.cyl; 490f3eb5384SStefan Weinhuber data->search_arg.head = data->seek_addr.head; 491f3eb5384SStefan Weinhuber data->search_arg.record = rec_on_trk; 492f3eb5384SStefan Weinhuber } 493f3eb5384SStefan Weinhuber 494f3eb5384SStefan Weinhuber static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 495b44b0ab3SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 496f3eb5384SStefan Weinhuber struct dasd_device *basedev, struct dasd_device *startdev, 49745f186beSJan Höppner unsigned int format, unsigned int rec_on_trk, int count, 498f3eb5384SStefan Weinhuber unsigned int blksize, unsigned int tlf) 4998e09f215SStefan Weinhuber { 5008e09f215SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 501f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 50245f186beSJan Höppner struct DE_eckd_data *dedata; 5038e09f215SStefan Weinhuber int rc = 0; 5048e09f215SStefan Weinhuber 505543691a4SSebastian Ott basepriv = basedev->private; 506543691a4SSebastian Ott startpriv = startdev->private; 507f3eb5384SStefan Weinhuber dedata = &pfxdata->define_extent; 508f3eb5384SStefan Weinhuber lredata = &pfxdata->locate_record; 5098e09f215SStefan Weinhuber 5108e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PFX; 5118e09f215SStefan Weinhuber ccw->flags = 0; 512e4dbb0f2SStefan Haberland if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) { 513e4dbb0f2SStefan Haberland ccw->count = sizeof(*pfxdata) + 2; 514e4dbb0f2SStefan Haberland ccw->cda = (__u32) __pa(pfxdata); 515e4dbb0f2SStefan Haberland memset(pfxdata, 0, sizeof(*pfxdata) + 2); 516e4dbb0f2SStefan Haberland } else { 5178e09f215SStefan Weinhuber ccw->count = sizeof(*pfxdata); 5188e09f215SStefan Weinhuber ccw->cda = (__u32) __pa(pfxdata); 5198e09f215SStefan Weinhuber memset(pfxdata, 0, sizeof(*pfxdata)); 520e4dbb0f2SStefan Haberland } 521e4dbb0f2SStefan Haberland 5228e09f215SStefan Weinhuber /* prefix data */ 523f3eb5384SStefan Weinhuber if (format > 1) { 524f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 525f3eb5384SStefan Weinhuber "PFX LRE unknown format 0x%x", format); 526f3eb5384SStefan Weinhuber BUG(); 527f3eb5384SStefan Weinhuber return -EINVAL; 528f3eb5384SStefan Weinhuber } 529f3eb5384SStefan Weinhuber pfxdata->format = format; 5304abb08c2SStefan Weinhuber pfxdata->base_address = basepriv->ned->unit_addr; 5314abb08c2SStefan Weinhuber pfxdata->base_lss = basepriv->ned->ID; 532f3eb5384SStefan Weinhuber pfxdata->validity.define_extent = 1; 5338e09f215SStefan Weinhuber 5348e09f215SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 535da340f92SStefan Haberland if (startpriv->uid.type == UA_BASE_PAV_ALIAS) 5368e09f215SStefan Weinhuber pfxdata->validity.verify_base = 1; 537da340f92SStefan Haberland 538da340f92SStefan Haberland if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) { 539da340f92SStefan Haberland pfxdata->validity.verify_base = 1; 5408e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 1; 5418e09f215SStefan Weinhuber } 5428e09f215SStefan Weinhuber 54345f186beSJan Höppner rc = define_extent(NULL, dedata, trk, totrk, cmd, basedev, blksize); 5448e09f215SStefan Weinhuber 54545f186beSJan Höppner /* 54645f186beSJan Höppner * For some commands the System Time Stamp is set in the define extent 54745f186beSJan Höppner * data when XRC is supported. The validity of the time stamp must be 54845f186beSJan Höppner * reflected in the prefix data as well. 54945f186beSJan Höppner */ 55045f186beSJan Höppner if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02) 55145f186beSJan Höppner pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */ 552f3eb5384SStefan Weinhuber 553f3eb5384SStefan Weinhuber if (format == 1) { 55445f186beSJan Höppner locate_record_ext(NULL, lredata, trk, rec_on_trk, count, cmd, 555f3eb5384SStefan Weinhuber basedev, blksize, tlf); 556f3eb5384SStefan Weinhuber } 557f3eb5384SStefan Weinhuber 5588e09f215SStefan Weinhuber return rc; 5598e09f215SStefan Weinhuber } 5608e09f215SStefan Weinhuber 561f3eb5384SStefan Weinhuber static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 562f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 563f3eb5384SStefan Weinhuber struct dasd_device *basedev, struct dasd_device *startdev) 564f3eb5384SStefan Weinhuber { 565f3eb5384SStefan Weinhuber return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev, 566f3eb5384SStefan Weinhuber 0, 0, 0, 0, 0); 567f3eb5384SStefan Weinhuber } 568f3eb5384SStefan Weinhuber 5694d284cacSHeiko Carstens static void 570b44b0ab3SStefan Weinhuber locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk, 571b44b0ab3SStefan Weinhuber unsigned int rec_on_trk, int no_rec, int cmd, 5721da177e4SLinus Torvalds struct dasd_device * device, int reclen) 5731da177e4SLinus Torvalds { 574543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 5751da177e4SLinus Torvalds int sector; 5761da177e4SLinus Torvalds int dn, d; 5771da177e4SLinus Torvalds 5781da177e4SLinus Torvalds DBF_DEV_EVENT(DBF_INFO, device, 5791da177e4SLinus Torvalds "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", 5801da177e4SLinus Torvalds trk, rec_on_trk, no_rec, cmd, reclen); 5811da177e4SLinus Torvalds 5821da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; 5831da177e4SLinus Torvalds ccw->flags = 0; 5841da177e4SLinus Torvalds ccw->count = 16; 5851da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 5861da177e4SLinus Torvalds 5871da177e4SLinus Torvalds memset(data, 0, sizeof(struct LO_eckd_data)); 5881da177e4SLinus Torvalds sector = 0; 5891da177e4SLinus Torvalds if (rec_on_trk) { 5901da177e4SLinus Torvalds switch (private->rdc_data.dev_type) { 5911da177e4SLinus Torvalds case 0x3390: 5921da177e4SLinus Torvalds dn = ceil_quot(reclen + 6, 232); 5931da177e4SLinus Torvalds d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 5941da177e4SLinus Torvalds sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 5951da177e4SLinus Torvalds break; 5961da177e4SLinus Torvalds case 0x3380: 5971da177e4SLinus Torvalds d = 7 + ceil_quot(reclen + 12, 32); 5981da177e4SLinus Torvalds sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 5991da177e4SLinus Torvalds break; 6001da177e4SLinus Torvalds } 6011da177e4SLinus Torvalds } 6021da177e4SLinus Torvalds data->sector = sector; 6031da177e4SLinus Torvalds data->count = no_rec; 6041da177e4SLinus Torvalds switch (cmd) { 6051da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 6061da177e4SLinus Torvalds data->operation.orientation = 0x3; 6071da177e4SLinus Torvalds data->operation.operation = 0x03; 6081da177e4SLinus Torvalds break; 6091da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 6101da177e4SLinus Torvalds data->operation.orientation = 0x3; 6111da177e4SLinus Torvalds data->operation.operation = 0x16; 6121da177e4SLinus Torvalds break; 6131da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 6141da177e4SLinus Torvalds data->operation.orientation = 0x1; 6151da177e4SLinus Torvalds data->operation.operation = 0x03; 6161da177e4SLinus Torvalds data->count++; 6171da177e4SLinus Torvalds break; 6181da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 6191da177e4SLinus Torvalds data->operation.orientation = 0x3; 6201da177e4SLinus Torvalds data->operation.operation = 0x16; 6211da177e4SLinus Torvalds data->count++; 6221da177e4SLinus Torvalds break; 6231da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 6241da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 6251da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 6261da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 6271da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6281da177e4SLinus Torvalds data->length = reclen; 6291da177e4SLinus Torvalds data->operation.operation = 0x01; 6301da177e4SLinus Torvalds break; 6311da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 6321da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 6331da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6341da177e4SLinus Torvalds data->length = reclen; 6351da177e4SLinus Torvalds data->operation.operation = 0x03; 6361da177e4SLinus Torvalds break; 6371da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 6381da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 6391da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 6401da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 6411da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6421da177e4SLinus Torvalds data->length = reclen; 6431da177e4SLinus Torvalds data->operation.operation = 0x06; 6441da177e4SLinus Torvalds break; 6451da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 6461da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 6471da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6481da177e4SLinus Torvalds data->length = reclen; 6491da177e4SLinus Torvalds data->operation.operation = 0x16; 6501da177e4SLinus Torvalds break; 6511da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_COUNT: 6521da177e4SLinus Torvalds data->operation.operation = 0x06; 6531da177e4SLinus Torvalds break; 6541da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 6551da177e4SLinus Torvalds data->length = reclen; 6561da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6571da177e4SLinus Torvalds data->operation.operation = 0x0b; 6581da177e4SLinus Torvalds break; 6591da177e4SLinus Torvalds default: 660fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record " 661fc19f381SStefan Haberland "opcode 0x%x", cmd); 6621da177e4SLinus Torvalds } 663b44b0ab3SStefan Weinhuber set_ch_t(&data->seek_addr, 664b44b0ab3SStefan Weinhuber trk / private->rdc_data.trk_per_cyl, 665b44b0ab3SStefan Weinhuber trk % private->rdc_data.trk_per_cyl); 666b44b0ab3SStefan Weinhuber data->search_arg.cyl = data->seek_addr.cyl; 667b44b0ab3SStefan Weinhuber data->search_arg.head = data->seek_addr.head; 6681da177e4SLinus Torvalds data->search_arg.record = rec_on_trk; 6691da177e4SLinus Torvalds } 6701da177e4SLinus Torvalds 6711da177e4SLinus Torvalds /* 6721da177e4SLinus Torvalds * Returns 1 if the block is one of the special blocks that needs 6731da177e4SLinus Torvalds * to get read/written with the KD variant of the command. 6741da177e4SLinus Torvalds * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and 6751da177e4SLinus Torvalds * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. 6761da177e4SLinus Torvalds * Luckily the KD variants differ only by one bit (0x08) from the 6771da177e4SLinus Torvalds * normal variant. So don't wonder about code like: 6781da177e4SLinus Torvalds * if (dasd_eckd_cdl_special(blk_per_trk, recid)) 6791da177e4SLinus Torvalds * ccw->cmd_code |= 0x8; 6801da177e4SLinus Torvalds */ 6811da177e4SLinus Torvalds static inline int 6821da177e4SLinus Torvalds dasd_eckd_cdl_special(int blk_per_trk, int recid) 6831da177e4SLinus Torvalds { 6841da177e4SLinus Torvalds if (recid < 3) 6851da177e4SLinus Torvalds return 1; 6861da177e4SLinus Torvalds if (recid < blk_per_trk) 6871da177e4SLinus Torvalds return 0; 6881da177e4SLinus Torvalds if (recid < 2 * blk_per_trk) 6891da177e4SLinus Torvalds return 1; 6901da177e4SLinus Torvalds return 0; 6911da177e4SLinus Torvalds } 6921da177e4SLinus Torvalds 6931da177e4SLinus Torvalds /* 6941da177e4SLinus Torvalds * Returns the record size for the special blocks of the cdl format. 6951da177e4SLinus Torvalds * Only returns something useful if dasd_eckd_cdl_special is true 6961da177e4SLinus Torvalds * for the recid. 6971da177e4SLinus Torvalds */ 6981da177e4SLinus Torvalds static inline int 6991da177e4SLinus Torvalds dasd_eckd_cdl_reclen(int recid) 7001da177e4SLinus Torvalds { 7011da177e4SLinus Torvalds if (recid < 3) 7021da177e4SLinus Torvalds return sizes_trk0[recid]; 7031da177e4SLinus Torvalds return LABEL_SIZE; 7041da177e4SLinus Torvalds } 705b206181dSStefan Haberland /* create unique id from private structure. */ 706b206181dSStefan Haberland static void create_uid(struct dasd_eckd_private *private) 7073d052595SHorst Hummel { 7084abb08c2SStefan Weinhuber int count; 709b206181dSStefan Haberland struct dasd_uid *uid; 7103d052595SHorst Hummel 7112dedf0d9SStefan Haberland uid = &private->uid; 7123d052595SHorst Hummel memset(uid, 0, sizeof(struct dasd_uid)); 7134abb08c2SStefan Weinhuber memcpy(uid->vendor, private->ned->HDA_manufacturer, 7143d052595SHorst Hummel sizeof(uid->vendor) - 1); 7153d052595SHorst Hummel EBCASC(uid->vendor, sizeof(uid->vendor) - 1); 7164abb08c2SStefan Weinhuber memcpy(uid->serial, private->ned->HDA_location, 7173d052595SHorst Hummel sizeof(uid->serial) - 1); 7183d052595SHorst Hummel EBCASC(uid->serial, sizeof(uid->serial) - 1); 7194abb08c2SStefan Weinhuber uid->ssid = private->gneq->subsystemID; 720a419aef8SJoe Perches uid->real_unit_addr = private->ned->unit_addr; 7214abb08c2SStefan Weinhuber if (private->sneq) { 7224abb08c2SStefan Weinhuber uid->type = private->sneq->sua_flags; 7238e09f215SStefan Weinhuber if (uid->type == UA_BASE_PAV_ALIAS) 7244abb08c2SStefan Weinhuber uid->base_unit_addr = private->sneq->base_unit_addr; 7258e09f215SStefan Weinhuber } else { 7268e09f215SStefan Weinhuber uid->type = UA_BASE_DEVICE; 7278e09f215SStefan Weinhuber } 7284abb08c2SStefan Weinhuber if (private->vdsneq) { 7294abb08c2SStefan Weinhuber for (count = 0; count < 16; count++) { 7304abb08c2SStefan Weinhuber sprintf(uid->vduit+2*count, "%02x", 7314abb08c2SStefan Weinhuber private->vdsneq->uit[count]); 7324abb08c2SStefan Weinhuber } 7334abb08c2SStefan Weinhuber } 734b206181dSStefan Haberland } 735b206181dSStefan Haberland 736b206181dSStefan Haberland /* 737b206181dSStefan Haberland * Generate device unique id that specifies the physical device. 738b206181dSStefan Haberland */ 739b206181dSStefan Haberland static int dasd_eckd_generate_uid(struct dasd_device *device) 740b206181dSStefan Haberland { 741543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 742b206181dSStefan Haberland unsigned long flags; 743b206181dSStefan Haberland 744b206181dSStefan Haberland if (!private) 745b206181dSStefan Haberland return -ENODEV; 746b206181dSStefan Haberland if (!private->ned || !private->gneq) 747b206181dSStefan Haberland return -ENODEV; 748b206181dSStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 749b206181dSStefan Haberland create_uid(private); 7502dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 7513d052595SHorst Hummel return 0; 7523d052595SHorst Hummel } 7533d052595SHorst Hummel 7542dedf0d9SStefan Haberland static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid) 7552dedf0d9SStefan Haberland { 756543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 7572dedf0d9SStefan Haberland unsigned long flags; 7582dedf0d9SStefan Haberland 759543691a4SSebastian Ott if (private) { 7602dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 7612dedf0d9SStefan Haberland *uid = private->uid; 7622dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 7632dedf0d9SStefan Haberland return 0; 7642dedf0d9SStefan Haberland } 7652dedf0d9SStefan Haberland return -EINVAL; 7662dedf0d9SStefan Haberland } 7672dedf0d9SStefan Haberland 768b206181dSStefan Haberland /* 769b206181dSStefan Haberland * compare device UID with data of a given dasd_eckd_private structure 770b206181dSStefan Haberland * return 0 for match 771b206181dSStefan Haberland */ 772b206181dSStefan Haberland static int dasd_eckd_compare_path_uid(struct dasd_device *device, 773b206181dSStefan Haberland struct dasd_eckd_private *private) 774b206181dSStefan Haberland { 775b206181dSStefan Haberland struct dasd_uid device_uid; 776b206181dSStefan Haberland 777b206181dSStefan Haberland create_uid(private); 778b206181dSStefan Haberland dasd_eckd_get_uid(device, &device_uid); 779b206181dSStefan Haberland 780b206181dSStefan Haberland return memcmp(&device_uid, &private->uid, sizeof(struct dasd_uid)); 781b206181dSStefan Haberland } 782b206181dSStefan Haberland 783a4d26c6aSStefan Weinhuber static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device, 784a4d26c6aSStefan Weinhuber struct dasd_ccw_req *cqr, 785a4d26c6aSStefan Weinhuber __u8 *rcd_buffer, 786a4d26c6aSStefan Weinhuber __u8 lpm) 78717283b56SCornelia Huck { 78817283b56SCornelia Huck struct ccw1 *ccw; 789a4d26c6aSStefan Weinhuber /* 790a4d26c6aSStefan Weinhuber * buffer has to start with EBCDIC "V1.0" to show 791a4d26c6aSStefan Weinhuber * support for virtual device SNEQ 792a4d26c6aSStefan Weinhuber */ 793a4d26c6aSStefan Weinhuber rcd_buffer[0] = 0xE5; 794a4d26c6aSStefan Weinhuber rcd_buffer[1] = 0xF1; 795a4d26c6aSStefan Weinhuber rcd_buffer[2] = 0x4B; 796a4d26c6aSStefan Weinhuber rcd_buffer[3] = 0xF0; 79717283b56SCornelia Huck 79817283b56SCornelia Huck ccw = cqr->cpaddr; 799a4d26c6aSStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RCD; 800a4d26c6aSStefan Weinhuber ccw->flags = 0; 80117283b56SCornelia Huck ccw->cda = (__u32)(addr_t)rcd_buffer; 802a4d26c6aSStefan Weinhuber ccw->count = DASD_ECKD_RCD_DATA_SIZE; 803a4d26c6aSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 80417283b56SCornelia Huck 8058e09f215SStefan Weinhuber cqr->startdev = device; 8068e09f215SStefan Weinhuber cqr->memdev = device; 8078e09f215SStefan Weinhuber cqr->block = NULL; 80817283b56SCornelia Huck cqr->expires = 10*HZ; 80917283b56SCornelia Huck cqr->lpm = lpm; 810eb6e199bSStefan Weinhuber cqr->retries = 256; 8111aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 81217283b56SCornelia Huck cqr->status = DASD_CQR_FILLED; 813a4d26c6aSStefan Weinhuber set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 814a4d26c6aSStefan Weinhuber } 815a4d26c6aSStefan Weinhuber 8165915a873SStefan Haberland /* 8175915a873SStefan Haberland * Wakeup helper for read_conf 8185915a873SStefan Haberland * if the cqr is not done and needs some error recovery 8195915a873SStefan Haberland * the buffer has to be re-initialized with the EBCDIC "V1.0" 8205915a873SStefan Haberland * to show support for virtual device SNEQ 8215915a873SStefan Haberland */ 8225915a873SStefan Haberland static void read_conf_cb(struct dasd_ccw_req *cqr, void *data) 8235915a873SStefan Haberland { 8245915a873SStefan Haberland struct ccw1 *ccw; 8255915a873SStefan Haberland __u8 *rcd_buffer; 8265915a873SStefan Haberland 8275915a873SStefan Haberland if (cqr->status != DASD_CQR_DONE) { 8285915a873SStefan Haberland ccw = cqr->cpaddr; 8295915a873SStefan Haberland rcd_buffer = (__u8 *)((addr_t) ccw->cda); 8305915a873SStefan Haberland memset(rcd_buffer, 0, sizeof(*rcd_buffer)); 8315915a873SStefan Haberland 8325915a873SStefan Haberland rcd_buffer[0] = 0xE5; 8335915a873SStefan Haberland rcd_buffer[1] = 0xF1; 8345915a873SStefan Haberland rcd_buffer[2] = 0x4B; 8355915a873SStefan Haberland rcd_buffer[3] = 0xF0; 8365915a873SStefan Haberland } 8375915a873SStefan Haberland dasd_wakeup_cb(cqr, data); 8385915a873SStefan Haberland } 8395915a873SStefan Haberland 840a4d26c6aSStefan Weinhuber static int dasd_eckd_read_conf_immediately(struct dasd_device *device, 841a4d26c6aSStefan Weinhuber struct dasd_ccw_req *cqr, 842a4d26c6aSStefan Weinhuber __u8 *rcd_buffer, 843a4d26c6aSStefan Weinhuber __u8 lpm) 844a4d26c6aSStefan Weinhuber { 845a4d26c6aSStefan Weinhuber struct ciw *ciw; 846a4d26c6aSStefan Weinhuber int rc; 847a4d26c6aSStefan Weinhuber /* 848a4d26c6aSStefan Weinhuber * sanity check: scan for RCD command in extended SenseID data 849a4d26c6aSStefan Weinhuber * some devices do not support RCD 850a4d26c6aSStefan Weinhuber */ 851a4d26c6aSStefan Weinhuber ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 852a4d26c6aSStefan Weinhuber if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) 853a4d26c6aSStefan Weinhuber return -EOPNOTSUPP; 854a4d26c6aSStefan Weinhuber 855a4d26c6aSStefan Weinhuber dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm); 856a4d26c6aSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 8575a27e60dSStefan Weinhuber set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 858a4d26c6aSStefan Weinhuber cqr->retries = 5; 8595915a873SStefan Haberland cqr->callback = read_conf_cb; 860a4d26c6aSStefan Weinhuber rc = dasd_sleep_on_immediatly(cqr); 861a4d26c6aSStefan Weinhuber return rc; 86217283b56SCornelia Huck } 86317283b56SCornelia Huck 86417283b56SCornelia Huck static int dasd_eckd_read_conf_lpm(struct dasd_device *device, 86517283b56SCornelia Huck void **rcd_buffer, 86617283b56SCornelia Huck int *rcd_buffer_size, __u8 lpm) 86717283b56SCornelia Huck { 86817283b56SCornelia Huck struct ciw *ciw; 86917283b56SCornelia Huck char *rcd_buf = NULL; 87017283b56SCornelia Huck int ret; 87117283b56SCornelia Huck struct dasd_ccw_req *cqr; 87217283b56SCornelia Huck 87317283b56SCornelia Huck /* 874a4d26c6aSStefan Weinhuber * sanity check: scan for RCD command in extended SenseID data 875a4d26c6aSStefan Weinhuber * some devices do not support RCD 87617283b56SCornelia Huck */ 87717283b56SCornelia Huck ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 878a4d26c6aSStefan Weinhuber if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) { 87917283b56SCornelia Huck ret = -EOPNOTSUPP; 88017283b56SCornelia Huck goto out_error; 88117283b56SCornelia Huck } 882a4d26c6aSStefan Weinhuber rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA); 88317283b56SCornelia Huck if (!rcd_buf) { 88417283b56SCornelia Huck ret = -ENOMEM; 88517283b56SCornelia Huck goto out_error; 88617283b56SCornelia Huck } 887a4d26c6aSStefan Weinhuber cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, 888a4d26c6aSStefan Weinhuber 0, /* use rcd_buf as data ara */ 889c5205f2fSSebastian Ott device, NULL); 89017283b56SCornelia Huck if (IS_ERR(cqr)) { 891a4d26c6aSStefan Weinhuber DBF_DEV_EVENT(DBF_WARNING, device, "%s", 892a4d26c6aSStefan Weinhuber "Could not allocate RCD request"); 893a4d26c6aSStefan Weinhuber ret = -ENOMEM; 89417283b56SCornelia Huck goto out_error; 89517283b56SCornelia Huck } 896a4d26c6aSStefan Weinhuber dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm); 8975915a873SStefan Haberland cqr->callback = read_conf_cb; 89817283b56SCornelia Huck ret = dasd_sleep_on(cqr); 89917283b56SCornelia Huck /* 90017283b56SCornelia Huck * on success we update the user input parms 90117283b56SCornelia Huck */ 9028e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 90317283b56SCornelia Huck if (ret) 90417283b56SCornelia Huck goto out_error; 90517283b56SCornelia Huck 906a4d26c6aSStefan Weinhuber *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE; 90717283b56SCornelia Huck *rcd_buffer = rcd_buf; 90817283b56SCornelia Huck return 0; 90917283b56SCornelia Huck out_error: 91017283b56SCornelia Huck kfree(rcd_buf); 91117283b56SCornelia Huck *rcd_buffer = NULL; 91217283b56SCornelia Huck *rcd_buffer_size = 0; 91317283b56SCornelia Huck return ret; 91417283b56SCornelia Huck } 91517283b56SCornelia Huck 9164abb08c2SStefan Weinhuber static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private) 9174abb08c2SStefan Weinhuber { 9184abb08c2SStefan Weinhuber 9194abb08c2SStefan Weinhuber struct dasd_sneq *sneq; 9204abb08c2SStefan Weinhuber int i, count; 9214abb08c2SStefan Weinhuber 9224abb08c2SStefan Weinhuber private->ned = NULL; 9234abb08c2SStefan Weinhuber private->sneq = NULL; 9244abb08c2SStefan Weinhuber private->vdsneq = NULL; 9254abb08c2SStefan Weinhuber private->gneq = NULL; 9264abb08c2SStefan Weinhuber count = private->conf_len / sizeof(struct dasd_sneq); 9274abb08c2SStefan Weinhuber sneq = (struct dasd_sneq *)private->conf_data; 9284abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 9294abb08c2SStefan Weinhuber if (sneq->flags.identifier == 1 && sneq->format == 1) 9304abb08c2SStefan Weinhuber private->sneq = sneq; 9314abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 1 && sneq->format == 4) 9324abb08c2SStefan Weinhuber private->vdsneq = (struct vd_sneq *)sneq; 9334abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 2) 9344abb08c2SStefan Weinhuber private->gneq = (struct dasd_gneq *)sneq; 9354abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 3 && sneq->res1 == 1) 9364abb08c2SStefan Weinhuber private->ned = (struct dasd_ned *)sneq; 9374abb08c2SStefan Weinhuber sneq++; 9384abb08c2SStefan Weinhuber } 9394abb08c2SStefan Weinhuber if (!private->ned || !private->gneq) { 9404abb08c2SStefan Weinhuber private->ned = NULL; 9414abb08c2SStefan Weinhuber private->sneq = NULL; 9424abb08c2SStefan Weinhuber private->vdsneq = NULL; 9434abb08c2SStefan Weinhuber private->gneq = NULL; 9444abb08c2SStefan Weinhuber return -EINVAL; 9454abb08c2SStefan Weinhuber } 9464abb08c2SStefan Weinhuber return 0; 9474abb08c2SStefan Weinhuber 9484abb08c2SStefan Weinhuber }; 9494abb08c2SStefan Weinhuber 9504abb08c2SStefan Weinhuber static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len) 9514abb08c2SStefan Weinhuber { 9524abb08c2SStefan Weinhuber struct dasd_gneq *gneq; 9534abb08c2SStefan Weinhuber int i, count, found; 9544abb08c2SStefan Weinhuber 9554abb08c2SStefan Weinhuber count = conf_len / sizeof(*gneq); 9564abb08c2SStefan Weinhuber gneq = (struct dasd_gneq *)conf_data; 9574abb08c2SStefan Weinhuber found = 0; 9584abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 9594abb08c2SStefan Weinhuber if (gneq->flags.identifier == 2) { 9604abb08c2SStefan Weinhuber found = 1; 9614abb08c2SStefan Weinhuber break; 9624abb08c2SStefan Weinhuber } 9634abb08c2SStefan Weinhuber gneq++; 9644abb08c2SStefan Weinhuber } 9654abb08c2SStefan Weinhuber if (found) 9664abb08c2SStefan Weinhuber return ((char *)gneq)[18] & 0x07; 9674abb08c2SStefan Weinhuber else 9684abb08c2SStefan Weinhuber return 0; 9694abb08c2SStefan Weinhuber } 9704abb08c2SStefan Weinhuber 971c7c0c9deSStefan Haberland static void dasd_eckd_clear_conf_data(struct dasd_device *device) 972c7c0c9deSStefan Haberland { 973543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 974c7c0c9deSStefan Haberland int i; 975c7c0c9deSStefan Haberland 976c7c0c9deSStefan Haberland private->conf_data = NULL; 977c7c0c9deSStefan Haberland private->conf_len = 0; 978c7c0c9deSStefan Haberland for (i = 0; i < 8; i++) { 979c9346151SStefan Haberland kfree(device->path[i].conf_data); 980c9346151SStefan Haberland device->path[i].conf_data = NULL; 981a521b048SStefan Haberland device->path[i].cssid = 0; 982a521b048SStefan Haberland device->path[i].ssid = 0; 983a521b048SStefan Haberland device->path[i].chpid = 0; 984c7c0c9deSStefan Haberland } 985c7c0c9deSStefan Haberland } 986c7c0c9deSStefan Haberland 987c7c0c9deSStefan Haberland 9884abb08c2SStefan Weinhuber static int dasd_eckd_read_conf(struct dasd_device *device) 9891da177e4SLinus Torvalds { 9901da177e4SLinus Torvalds void *conf_data; 9911da177e4SLinus Torvalds int conf_len, conf_data_saved; 992b179b037SStefan Haberland int rc, path_err, pos; 993a4d26c6aSStefan Weinhuber __u8 lpm, opm; 994b206181dSStefan Haberland struct dasd_eckd_private *private, path_private; 995b206181dSStefan Haberland struct dasd_uid *uid; 996b206181dSStefan Haberland char print_path_uid[60], print_device_uid[60]; 997ded27d8dSSebastian Ott struct channel_path_desc_fmt0 *chp_desc; 998a521b048SStefan Haberland struct subchannel_id sch_id; 9991da177e4SLinus Torvalds 1000543691a4SSebastian Ott private = device->private; 1001a4d26c6aSStefan Weinhuber opm = ccw_device_get_path_mask(device->cdev); 1002a521b048SStefan Haberland ccw_device_get_schid(device->cdev, &sch_id); 10031da177e4SLinus Torvalds conf_data_saved = 0; 100455d3a85cSStefan Haberland path_err = 0; 10051da177e4SLinus Torvalds /* get configuration data per operational path */ 10061da177e4SLinus Torvalds for (lpm = 0x80; lpm; lpm>>= 1) { 1007b206181dSStefan Haberland if (!(lpm & opm)) 1008b206181dSStefan Haberland continue; 100917283b56SCornelia Huck rc = dasd_eckd_read_conf_lpm(device, &conf_data, 10101da177e4SLinus Torvalds &conf_len, lpm); 10111da177e4SLinus Torvalds if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ 1012b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 10131da177e4SLinus Torvalds "Read configuration data returned " 1014b8ed5dd5SStefan Haberland "error %d", rc); 10151da177e4SLinus Torvalds return rc; 10161da177e4SLinus Torvalds } 10171da177e4SLinus Torvalds if (conf_data == NULL) { 1018b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1019b8ed5dd5SStefan Haberland "No configuration data " 1020b8ed5dd5SStefan Haberland "retrieved"); 1021a4d26c6aSStefan Weinhuber /* no further analysis possible */ 1022c9346151SStefan Haberland dasd_path_add_opm(device, opm); 1023d133a960SGabriel Craciunescu continue; /* no error */ 10241da177e4SLinus Torvalds } 10251da177e4SLinus Torvalds /* save first valid configuration data */ 10261da177e4SLinus Torvalds if (!conf_data_saved) { 1027c7c0c9deSStefan Haberland /* initially clear previously stored conf_data */ 1028c7c0c9deSStefan Haberland dasd_eckd_clear_conf_data(device); 10294abb08c2SStefan Weinhuber private->conf_data = conf_data; 10304abb08c2SStefan Weinhuber private->conf_len = conf_len; 10314abb08c2SStefan Weinhuber if (dasd_eckd_identify_conf_parts(private)) { 10324abb08c2SStefan Weinhuber private->conf_data = NULL; 10334abb08c2SStefan Weinhuber private->conf_len = 0; 10344abb08c2SStefan Weinhuber kfree(conf_data); 10354abb08c2SStefan Weinhuber continue; 10364abb08c2SStefan Weinhuber } 1037c7c0c9deSStefan Haberland pos = pathmask_to_pos(lpm); 1038c7c0c9deSStefan Haberland /* store per path conf_data */ 1039c9346151SStefan Haberland device->path[pos].conf_data = conf_data; 1040a521b048SStefan Haberland device->path[pos].cssid = sch_id.cssid; 1041a521b048SStefan Haberland device->path[pos].ssid = sch_id.ssid; 1042a521b048SStefan Haberland chp_desc = ccw_device_get_chp_desc(device->cdev, pos); 1043a521b048SStefan Haberland if (chp_desc) 1044a521b048SStefan Haberland device->path[pos].chpid = chp_desc->chpid; 1045a521b048SStefan Haberland kfree(chp_desc); 1046b206181dSStefan Haberland /* 1047b206181dSStefan Haberland * build device UID that other path data 1048b206181dSStefan Haberland * can be compared to it 1049b206181dSStefan Haberland */ 1050b206181dSStefan Haberland dasd_eckd_generate_uid(device); 10511da177e4SLinus Torvalds conf_data_saved++; 1052b206181dSStefan Haberland } else { 1053b206181dSStefan Haberland path_private.conf_data = conf_data; 1054b206181dSStefan Haberland path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1055b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts( 1056b206181dSStefan Haberland &path_private)) { 1057b206181dSStefan Haberland path_private.conf_data = NULL; 1058b206181dSStefan Haberland path_private.conf_len = 0; 1059b206181dSStefan Haberland kfree(conf_data); 1060b206181dSStefan Haberland continue; 1061b206181dSStefan Haberland } 1062b206181dSStefan Haberland if (dasd_eckd_compare_path_uid( 1063b206181dSStefan Haberland device, &path_private)) { 1064b206181dSStefan Haberland uid = &path_private.uid; 1065b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1066b206181dSStefan Haberland snprintf(print_path_uid, 1067b206181dSStefan Haberland sizeof(print_path_uid), 1068b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1069b206181dSStefan Haberland uid->vendor, uid->serial, 1070b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1071b206181dSStefan Haberland uid->vduit); 1072b206181dSStefan Haberland else 1073b206181dSStefan Haberland snprintf(print_path_uid, 1074b206181dSStefan Haberland sizeof(print_path_uid), 1075b206181dSStefan Haberland "%s.%s.%04x.%02x", 1076b206181dSStefan Haberland uid->vendor, uid->serial, 1077b206181dSStefan Haberland uid->ssid, 1078b206181dSStefan Haberland uid->real_unit_addr); 1079b206181dSStefan Haberland uid = &private->uid; 1080b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1081b206181dSStefan Haberland snprintf(print_device_uid, 1082b206181dSStefan Haberland sizeof(print_device_uid), 1083b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1084b206181dSStefan Haberland uid->vendor, uid->serial, 1085b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1086b206181dSStefan Haberland uid->vduit); 1087b206181dSStefan Haberland else 1088b206181dSStefan Haberland snprintf(print_device_uid, 1089b206181dSStefan Haberland sizeof(print_device_uid), 1090b206181dSStefan Haberland "%s.%s.%04x.%02x", 1091b206181dSStefan Haberland uid->vendor, uid->serial, 1092b206181dSStefan Haberland uid->ssid, 1093b206181dSStefan Haberland uid->real_unit_addr); 1094b206181dSStefan Haberland dev_err(&device->cdev->dev, 1095b206181dSStefan Haberland "Not all channel paths lead to " 1096b206181dSStefan Haberland "the same device, path %02X leads to " 1097b206181dSStefan Haberland "device %s instead of %s\n", lpm, 1098b206181dSStefan Haberland print_path_uid, print_device_uid); 109955d3a85cSStefan Haberland path_err = -EINVAL; 1100c9346151SStefan Haberland dasd_path_add_cablepm(device, lpm); 110155d3a85cSStefan Haberland continue; 1102b206181dSStefan Haberland } 1103c7c0c9deSStefan Haberland pos = pathmask_to_pos(lpm); 1104c7c0c9deSStefan Haberland /* store per path conf_data */ 1105c9346151SStefan Haberland device->path[pos].conf_data = conf_data; 1106a521b048SStefan Haberland device->path[pos].cssid = sch_id.cssid; 1107a521b048SStefan Haberland device->path[pos].ssid = sch_id.ssid; 1108a521b048SStefan Haberland chp_desc = ccw_device_get_chp_desc(device->cdev, pos); 1109a521b048SStefan Haberland if (chp_desc) 1110a521b048SStefan Haberland device->path[pos].chpid = chp_desc->chpid; 1111a521b048SStefan Haberland kfree(chp_desc); 1112b206181dSStefan Haberland path_private.conf_data = NULL; 1113b206181dSStefan Haberland path_private.conf_len = 0; 11141da177e4SLinus Torvalds } 11154abb08c2SStefan Weinhuber switch (dasd_eckd_path_access(conf_data, conf_len)) { 11161da177e4SLinus Torvalds case 0x02: 1117c9346151SStefan Haberland dasd_path_add_nppm(device, lpm); 11181da177e4SLinus Torvalds break; 11191da177e4SLinus Torvalds case 0x03: 1120c9346151SStefan Haberland dasd_path_add_ppm(device, lpm); 11211da177e4SLinus Torvalds break; 11221da177e4SLinus Torvalds } 1123c9346151SStefan Haberland if (!dasd_path_get_opm(device)) { 1124c9346151SStefan Haberland dasd_path_set_opm(device, lpm); 1125ccc0e7dcSStefan Haberland dasd_generic_path_operational(device); 1126ccc0e7dcSStefan Haberland } else { 1127c9346151SStefan Haberland dasd_path_add_opm(device, lpm); 1128ccc0e7dcSStefan Haberland } 11291da177e4SLinus Torvalds } 1130b206181dSStefan Haberland 113155d3a85cSStefan Haberland return path_err; 11321da177e4SLinus Torvalds } 11331da177e4SLinus Torvalds 1134a521b048SStefan Haberland static u32 get_fcx_max_data(struct dasd_device *device) 1135a521b048SStefan Haberland { 1136a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 1137a521b048SStefan Haberland int fcx_in_css, fcx_in_gneq, fcx_in_features; 1138a521b048SStefan Haberland int tpm, mdc; 1139a521b048SStefan Haberland 1140a521b048SStefan Haberland if (dasd_nofcx) 1141a521b048SStefan Haberland return 0; 1142a521b048SStefan Haberland /* is transport mode supported? */ 1143a521b048SStefan Haberland fcx_in_css = css_general_characteristics.fcx; 1144a521b048SStefan Haberland fcx_in_gneq = private->gneq->reserved2[7] & 0x04; 1145a521b048SStefan Haberland fcx_in_features = private->features.feature[40] & 0x80; 1146a521b048SStefan Haberland tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; 1147a521b048SStefan Haberland 1148a521b048SStefan Haberland if (!tpm) 1149a521b048SStefan Haberland return 0; 1150a521b048SStefan Haberland 1151a521b048SStefan Haberland mdc = ccw_device_get_mdc(device->cdev, 0); 1152a521b048SStefan Haberland if (mdc < 0) { 1153a521b048SStefan Haberland dev_warn(&device->cdev->dev, "Detecting the maximum supported data size for zHPF requests failed\n"); 1154a521b048SStefan Haberland return 0; 1155a521b048SStefan Haberland } else { 1156a521b048SStefan Haberland return (u32)mdc * FCX_MAX_DATA_FACTOR; 1157a521b048SStefan Haberland } 1158a521b048SStefan Haberland } 1159a521b048SStefan Haberland 1160a4d26c6aSStefan Weinhuber static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm) 1161a4d26c6aSStefan Weinhuber { 1162543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1163a4d26c6aSStefan Weinhuber int mdc; 1164a4d26c6aSStefan Weinhuber u32 fcx_max_data; 1165a4d26c6aSStefan Weinhuber 1166a4d26c6aSStefan Weinhuber if (private->fcx_max_data) { 1167a4d26c6aSStefan Weinhuber mdc = ccw_device_get_mdc(device->cdev, lpm); 1168a4d26c6aSStefan Weinhuber if ((mdc < 0)) { 1169a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1170a4d26c6aSStefan Weinhuber "Detecting the maximum data size for zHPF " 1171a4d26c6aSStefan Weinhuber "requests failed (rc=%d) for a new path %x\n", 1172a4d26c6aSStefan Weinhuber mdc, lpm); 1173a4d26c6aSStefan Weinhuber return mdc; 1174a4d26c6aSStefan Weinhuber } 11750f02c4e7SChristian Borntraeger fcx_max_data = (u32)mdc * FCX_MAX_DATA_FACTOR; 1176a4d26c6aSStefan Weinhuber if (fcx_max_data < private->fcx_max_data) { 1177a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1178a4d26c6aSStefan Weinhuber "The maximum data size for zHPF requests %u " 1179a4d26c6aSStefan Weinhuber "on a new path %x is below the active maximum " 1180a4d26c6aSStefan Weinhuber "%u\n", fcx_max_data, lpm, 1181a4d26c6aSStefan Weinhuber private->fcx_max_data); 1182a4d26c6aSStefan Weinhuber return -EACCES; 1183a4d26c6aSStefan Weinhuber } 1184a4d26c6aSStefan Weinhuber } 1185a4d26c6aSStefan Weinhuber return 0; 1186a4d26c6aSStefan Weinhuber } 1187a4d26c6aSStefan Weinhuber 1188b206181dSStefan Haberland static int rebuild_device_uid(struct dasd_device *device, 1189b206181dSStefan Haberland struct path_verification_work_data *data) 1190b206181dSStefan Haberland { 1191543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1192c9346151SStefan Haberland __u8 lpm, opm = dasd_path_get_opm(device); 1193543691a4SSebastian Ott int rc = -ENODEV; 1194b206181dSStefan Haberland 1195b206181dSStefan Haberland for (lpm = 0x80; lpm; lpm >>= 1) { 1196b206181dSStefan Haberland if (!(lpm & opm)) 1197b206181dSStefan Haberland continue; 1198b206181dSStefan Haberland memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1199b206181dSStefan Haberland memset(&data->cqr, 0, sizeof(data->cqr)); 1200b206181dSStefan Haberland data->cqr.cpaddr = &data->ccw; 1201b206181dSStefan Haberland rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1202b206181dSStefan Haberland data->rcd_buffer, 1203b206181dSStefan Haberland lpm); 1204b206181dSStefan Haberland 1205b206181dSStefan Haberland if (rc) { 1206b206181dSStefan Haberland if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */ 1207b206181dSStefan Haberland continue; 1208b206181dSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1209b206181dSStefan Haberland "Read configuration data " 1210b206181dSStefan Haberland "returned error %d", rc); 1211b206181dSStefan Haberland break; 1212b206181dSStefan Haberland } 1213b206181dSStefan Haberland memcpy(private->conf_data, data->rcd_buffer, 1214b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE); 1215b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts(private)) { 1216b206181dSStefan Haberland rc = -ENODEV; 1217b206181dSStefan Haberland } else /* first valid path is enough */ 1218b206181dSStefan Haberland break; 1219b206181dSStefan Haberland } 1220b206181dSStefan Haberland 1221b206181dSStefan Haberland if (!rc) 1222b206181dSStefan Haberland rc = dasd_eckd_generate_uid(device); 1223b206181dSStefan Haberland 1224b206181dSStefan Haberland return rc; 1225b206181dSStefan Haberland } 1226b206181dSStefan Haberland 1227a4d26c6aSStefan Weinhuber static void do_path_verification_work(struct work_struct *work) 1228a4d26c6aSStefan Weinhuber { 1229a4d26c6aSStefan Weinhuber struct path_verification_work_data *data; 1230a4d26c6aSStefan Weinhuber struct dasd_device *device; 1231b206181dSStefan Haberland struct dasd_eckd_private path_private; 1232b206181dSStefan Haberland struct dasd_uid *uid; 1233b206181dSStefan Haberland __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE]; 12345db8440cSStefan Haberland __u8 lpm, opm, npm, ppm, epm, hpfpm, cablepm; 1235a4d26c6aSStefan Weinhuber unsigned long flags; 1236b206181dSStefan Haberland char print_uid[60]; 1237a4d26c6aSStefan Weinhuber int rc; 1238a4d26c6aSStefan Weinhuber 1239a4d26c6aSStefan Weinhuber data = container_of(work, struct path_verification_work_data, worker); 1240a4d26c6aSStefan Weinhuber device = data->device; 1241a4d26c6aSStefan Weinhuber 1242c8d1c0ffSStefan Haberland /* delay path verification until device was resumed */ 1243c8d1c0ffSStefan Haberland if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 1244c8d1c0ffSStefan Haberland schedule_work(work); 1245c8d1c0ffSStefan Haberland return; 1246c8d1c0ffSStefan Haberland } 12471eb38023SStefan Haberland /* check if path verification already running and delay if so */ 12481eb38023SStefan Haberland if (test_and_set_bit(DASD_FLAG_PATH_VERIFY, &device->flags)) { 12491eb38023SStefan Haberland schedule_work(work); 12501eb38023SStefan Haberland return; 12511eb38023SStefan Haberland } 1252a4d26c6aSStefan Weinhuber opm = 0; 1253a4d26c6aSStefan Weinhuber npm = 0; 1254a4d26c6aSStefan Weinhuber ppm = 0; 1255a4d26c6aSStefan Weinhuber epm = 0; 12565db8440cSStefan Haberland hpfpm = 0; 12575db8440cSStefan Haberland cablepm = 0; 12585db8440cSStefan Haberland 1259a4d26c6aSStefan Weinhuber for (lpm = 0x80; lpm; lpm >>= 1) { 1260b206181dSStefan Haberland if (!(lpm & data->tbvpm)) 1261b206181dSStefan Haberland continue; 1262b206181dSStefan Haberland memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1263a4d26c6aSStefan Weinhuber memset(&data->cqr, 0, sizeof(data->cqr)); 1264a4d26c6aSStefan Weinhuber data->cqr.cpaddr = &data->ccw; 1265a4d26c6aSStefan Weinhuber rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1266a4d26c6aSStefan Weinhuber data->rcd_buffer, 1267a4d26c6aSStefan Weinhuber lpm); 1268a4d26c6aSStefan Weinhuber if (!rc) { 1269a4d26c6aSStefan Weinhuber switch (dasd_eckd_path_access(data->rcd_buffer, 1270b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE) 1271b206181dSStefan Haberland ) { 1272a4d26c6aSStefan Weinhuber case 0x02: 1273a4d26c6aSStefan Weinhuber npm |= lpm; 1274a4d26c6aSStefan Weinhuber break; 1275a4d26c6aSStefan Weinhuber case 0x03: 1276a4d26c6aSStefan Weinhuber ppm |= lpm; 1277a4d26c6aSStefan Weinhuber break; 1278a4d26c6aSStefan Weinhuber } 1279a4d26c6aSStefan Weinhuber opm |= lpm; 1280a4d26c6aSStefan Weinhuber } else if (rc == -EOPNOTSUPP) { 1281a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1282a4d26c6aSStefan Weinhuber "path verification: No configuration " 1283a4d26c6aSStefan Weinhuber "data retrieved"); 1284a4d26c6aSStefan Weinhuber opm |= lpm; 1285a4d26c6aSStefan Weinhuber } else if (rc == -EAGAIN) { 1286a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1287a4d26c6aSStefan Weinhuber "path verification: device is stopped," 1288a4d26c6aSStefan Weinhuber " try again later"); 1289a4d26c6aSStefan Weinhuber epm |= lpm; 1290a4d26c6aSStefan Weinhuber } else { 1291a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1292a4d26c6aSStefan Weinhuber "Reading device feature codes failed " 1293a4d26c6aSStefan Weinhuber "(rc=%d) for new path %x\n", rc, lpm); 1294a4d26c6aSStefan Weinhuber continue; 1295a4d26c6aSStefan Weinhuber } 1296a4d26c6aSStefan Weinhuber if (verify_fcx_max_data(device, lpm)) { 1297a4d26c6aSStefan Weinhuber opm &= ~lpm; 1298a4d26c6aSStefan Weinhuber npm &= ~lpm; 1299a4d26c6aSStefan Weinhuber ppm &= ~lpm; 13005db8440cSStefan Haberland hpfpm |= lpm; 1301b206181dSStefan Haberland continue; 1302b206181dSStefan Haberland } 1303b206181dSStefan Haberland 1304b206181dSStefan Haberland /* 1305b206181dSStefan Haberland * save conf_data for comparison after 1306b206181dSStefan Haberland * rebuild_device_uid may have changed 1307b206181dSStefan Haberland * the original data 1308b206181dSStefan Haberland */ 1309b206181dSStefan Haberland memcpy(&path_rcd_buf, data->rcd_buffer, 1310b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE); 1311b206181dSStefan Haberland path_private.conf_data = (void *) &path_rcd_buf; 1312b206181dSStefan Haberland path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1313b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts(&path_private)) { 1314b206181dSStefan Haberland path_private.conf_data = NULL; 1315b206181dSStefan Haberland path_private.conf_len = 0; 1316b206181dSStefan Haberland continue; 1317b206181dSStefan Haberland } 1318b206181dSStefan Haberland 1319b206181dSStefan Haberland /* 1320b206181dSStefan Haberland * compare path UID with device UID only if at least 1321b206181dSStefan Haberland * one valid path is left 1322b206181dSStefan Haberland * in other case the device UID may have changed and 1323b206181dSStefan Haberland * the first working path UID will be used as device UID 1324b206181dSStefan Haberland */ 1325c9346151SStefan Haberland if (dasd_path_get_opm(device) && 1326b206181dSStefan Haberland dasd_eckd_compare_path_uid(device, &path_private)) { 1327b206181dSStefan Haberland /* 1328b206181dSStefan Haberland * the comparison was not successful 1329b206181dSStefan Haberland * rebuild the device UID with at least one 1330b206181dSStefan Haberland * known path in case a z/VM hyperswap command 1331b206181dSStefan Haberland * has changed the device 1332b206181dSStefan Haberland * 1333b206181dSStefan Haberland * after this compare again 1334b206181dSStefan Haberland * 1335b206181dSStefan Haberland * if either the rebuild or the recompare fails 1336b206181dSStefan Haberland * the path can not be used 1337b206181dSStefan Haberland */ 1338b206181dSStefan Haberland if (rebuild_device_uid(device, data) || 1339b206181dSStefan Haberland dasd_eckd_compare_path_uid( 1340b206181dSStefan Haberland device, &path_private)) { 1341b206181dSStefan Haberland uid = &path_private.uid; 1342b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1343b206181dSStefan Haberland snprintf(print_uid, sizeof(print_uid), 1344b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1345b206181dSStefan Haberland uid->vendor, uid->serial, 1346b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1347b206181dSStefan Haberland uid->vduit); 1348b206181dSStefan Haberland else 1349b206181dSStefan Haberland snprintf(print_uid, sizeof(print_uid), 1350b206181dSStefan Haberland "%s.%s.%04x.%02x", 1351b206181dSStefan Haberland uid->vendor, uid->serial, 1352b206181dSStefan Haberland uid->ssid, 1353b206181dSStefan Haberland uid->real_unit_addr); 1354b206181dSStefan Haberland dev_err(&device->cdev->dev, 1355b206181dSStefan Haberland "The newly added channel path %02X " 1356b206181dSStefan Haberland "will not be used because it leads " 1357b206181dSStefan Haberland "to a different device %s\n", 1358b206181dSStefan Haberland lpm, print_uid); 1359b206181dSStefan Haberland opm &= ~lpm; 1360b206181dSStefan Haberland npm &= ~lpm; 1361b206181dSStefan Haberland ppm &= ~lpm; 13625db8440cSStefan Haberland cablepm |= lpm; 1363b206181dSStefan Haberland continue; 1364a4d26c6aSStefan Weinhuber } 1365a4d26c6aSStefan Weinhuber } 1366b206181dSStefan Haberland 1367a4d26c6aSStefan Weinhuber /* 1368a4d26c6aSStefan Weinhuber * There is a small chance that a path is lost again between 1369a4d26c6aSStefan Weinhuber * above path verification and the following modification of 1370a4d26c6aSStefan Weinhuber * the device opm mask. We could avoid that race here by using 1371a4d26c6aSStefan Weinhuber * yet another path mask, but we rather deal with this unlikely 1372a4d26c6aSStefan Weinhuber * situation in dasd_start_IO. 1373a4d26c6aSStefan Weinhuber */ 1374a4d26c6aSStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1375c9346151SStefan Haberland if (!dasd_path_get_opm(device) && opm) { 1376c9346151SStefan Haberland dasd_path_set_opm(device, opm); 1377a4d26c6aSStefan Weinhuber dasd_generic_path_operational(device); 13785db8440cSStefan Haberland } else { 1379c9346151SStefan Haberland dasd_path_add_opm(device, opm); 13805db8440cSStefan Haberland } 1381c9346151SStefan Haberland dasd_path_add_nppm(device, npm); 1382c9346151SStefan Haberland dasd_path_add_ppm(device, ppm); 1383c9346151SStefan Haberland dasd_path_add_tbvpm(device, epm); 1384c9346151SStefan Haberland dasd_path_add_cablepm(device, cablepm); 1385c9346151SStefan Haberland dasd_path_add_nohpfpm(device, hpfpm); 1386a4d26c6aSStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1387b206181dSStefan Haberland } 13881eb38023SStefan Haberland clear_bit(DASD_FLAG_PATH_VERIFY, &device->flags); 1389a4d26c6aSStefan Weinhuber dasd_put_device(device); 1390a4d26c6aSStefan Weinhuber if (data->isglobal) 1391a4d26c6aSStefan Weinhuber mutex_unlock(&dasd_path_verification_mutex); 1392a4d26c6aSStefan Weinhuber else 1393a4d26c6aSStefan Weinhuber kfree(data); 1394a4d26c6aSStefan Weinhuber } 1395a4d26c6aSStefan Weinhuber 1396a4d26c6aSStefan Weinhuber static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm) 1397a4d26c6aSStefan Weinhuber { 1398a4d26c6aSStefan Weinhuber struct path_verification_work_data *data; 1399a4d26c6aSStefan Weinhuber 1400a4d26c6aSStefan Weinhuber data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA); 1401a4d26c6aSStefan Weinhuber if (!data) { 1402a4d26c6aSStefan Weinhuber if (mutex_trylock(&dasd_path_verification_mutex)) { 1403a4d26c6aSStefan Weinhuber data = path_verification_worker; 1404a4d26c6aSStefan Weinhuber data->isglobal = 1; 1405a4d26c6aSStefan Weinhuber } else 1406a4d26c6aSStefan Weinhuber return -ENOMEM; 1407a4d26c6aSStefan Weinhuber } else { 1408a4d26c6aSStefan Weinhuber memset(data, 0, sizeof(*data)); 1409a4d26c6aSStefan Weinhuber data->isglobal = 0; 1410a4d26c6aSStefan Weinhuber } 1411a4d26c6aSStefan Weinhuber INIT_WORK(&data->worker, do_path_verification_work); 1412a4d26c6aSStefan Weinhuber dasd_get_device(device); 1413a4d26c6aSStefan Weinhuber data->device = device; 1414a4d26c6aSStefan Weinhuber data->tbvpm = lpm; 1415a4d26c6aSStefan Weinhuber schedule_work(&data->worker); 1416a4d26c6aSStefan Weinhuber return 0; 1417a4d26c6aSStefan Weinhuber } 1418a4d26c6aSStefan Weinhuber 1419a521b048SStefan Haberland static void dasd_eckd_reset_path(struct dasd_device *device, __u8 pm) 1420a521b048SStefan Haberland { 1421a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 1422a521b048SStefan Haberland unsigned long flags; 1423a521b048SStefan Haberland 1424a521b048SStefan Haberland if (!private->fcx_max_data) 1425a521b048SStefan Haberland private->fcx_max_data = get_fcx_max_data(device); 1426a521b048SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1427a521b048SStefan Haberland dasd_path_set_tbvpm(device, pm ? : dasd_path_get_notoperpm(device)); 1428a521b048SStefan Haberland dasd_schedule_device_bh(device); 1429a521b048SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1430a521b048SStefan Haberland } 1431a521b048SStefan Haberland 14328e09f215SStefan Weinhuber static int dasd_eckd_read_features(struct dasd_device *device) 14338e09f215SStefan Weinhuber { 1434543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 14358e09f215SStefan Weinhuber struct dasd_psf_prssd_data *prssdp; 14368e09f215SStefan Weinhuber struct dasd_rssd_features *features; 14378e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 14388e09f215SStefan Weinhuber struct ccw1 *ccw; 14398e09f215SStefan Weinhuber int rc; 14408e09f215SStefan Weinhuber 144168d1e5f0SStefan Weinhuber memset(&private->features, 0, sizeof(struct dasd_rssd_features)); 144268b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 14438e09f215SStefan Weinhuber (sizeof(struct dasd_psf_prssd_data) + 14448e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)), 1445c5205f2fSSebastian Ott device, NULL); 14468e09f215SStefan Weinhuber if (IS_ERR(cqr)) { 1447b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " 1448b8ed5dd5SStefan Haberland "allocate initialization request"); 14498e09f215SStefan Weinhuber return PTR_ERR(cqr); 14508e09f215SStefan Weinhuber } 14518e09f215SStefan Weinhuber cqr->startdev = device; 14528e09f215SStefan Weinhuber cqr->memdev = device; 14538e09f215SStefan Weinhuber cqr->block = NULL; 1454eb6e199bSStefan Weinhuber cqr->retries = 256; 14558e09f215SStefan Weinhuber cqr->expires = 10 * HZ; 14568e09f215SStefan Weinhuber 14578e09f215SStefan Weinhuber /* Prepare for Read Subsystem Data */ 14588e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 14598e09f215SStefan Weinhuber memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 14608e09f215SStefan Weinhuber prssdp->order = PSF_ORDER_PRSSD; 14618e09f215SStefan Weinhuber prssdp->suborder = 0x41; /* Read Feature Codes */ 14628e09f215SStefan Weinhuber /* all other bytes of prssdp must be zero */ 14638e09f215SStefan Weinhuber 14648e09f215SStefan Weinhuber ccw = cqr->cpaddr; 14658e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PSF; 14668e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_psf_prssd_data); 14678e09f215SStefan Weinhuber ccw->flags |= CCW_FLAG_CC; 14688e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) prssdp; 14698e09f215SStefan Weinhuber 14708e09f215SStefan Weinhuber /* Read Subsystem Data - feature codes */ 14718e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 14728e09f215SStefan Weinhuber memset(features, 0, sizeof(struct dasd_rssd_features)); 14738e09f215SStefan Weinhuber 14748e09f215SStefan Weinhuber ccw++; 14758e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RSSD; 14768e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_rssd_features); 14778e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) features; 14788e09f215SStefan Weinhuber 14791aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 14808e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 14818e09f215SStefan Weinhuber rc = dasd_sleep_on(cqr); 14828e09f215SStefan Weinhuber if (rc == 0) { 14838e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 14848e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 14858e09f215SStefan Weinhuber memcpy(&private->features, features, 14868e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)); 148768d1e5f0SStefan Weinhuber } else 148868d1e5f0SStefan Weinhuber dev_warn(&device->cdev->dev, "Reading device feature codes" 148968d1e5f0SStefan Weinhuber " failed with rc=%d\n", rc); 14908e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 14918e09f215SStefan Weinhuber return rc; 14928e09f215SStefan Weinhuber } 14938e09f215SStefan Weinhuber 14948e09f215SStefan Weinhuber 14953d052595SHorst Hummel /* 149640545573SHorst Hummel * Build CP for Perform Subsystem Function - SSC. 149740545573SHorst Hummel */ 1498f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, 1499f3eb5384SStefan Weinhuber int enable_pav) 150040545573SHorst Hummel { 150140545573SHorst Hummel struct dasd_ccw_req *cqr; 150240545573SHorst Hummel struct dasd_psf_ssc_data *psf_ssc_data; 150340545573SHorst Hummel struct ccw1 *ccw; 150440545573SHorst Hummel 150568b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 150640545573SHorst Hummel sizeof(struct dasd_psf_ssc_data), 1507c5205f2fSSebastian Ott device, NULL); 150840545573SHorst Hummel 150940545573SHorst Hummel if (IS_ERR(cqr)) { 1510fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 151140545573SHorst Hummel "Could not allocate PSF-SSC request"); 151240545573SHorst Hummel return cqr; 151340545573SHorst Hummel } 151440545573SHorst Hummel psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 151540545573SHorst Hummel psf_ssc_data->order = PSF_ORDER_SSC; 1516626350b6SStefan Weinhuber psf_ssc_data->suborder = 0xc0; 1517f3eb5384SStefan Weinhuber if (enable_pav) { 1518626350b6SStefan Weinhuber psf_ssc_data->suborder |= 0x08; 15198e09f215SStefan Weinhuber psf_ssc_data->reserved[0] = 0x88; 1520f3eb5384SStefan Weinhuber } 152140545573SHorst Hummel ccw = cqr->cpaddr; 152240545573SHorst Hummel ccw->cmd_code = DASD_ECKD_CCW_PSF; 152340545573SHorst Hummel ccw->cda = (__u32)(addr_t)psf_ssc_data; 152440545573SHorst Hummel ccw->count = 66; 152540545573SHorst Hummel 15268e09f215SStefan Weinhuber cqr->startdev = device; 15278e09f215SStefan Weinhuber cqr->memdev = device; 15288e09f215SStefan Weinhuber cqr->block = NULL; 1529eb6e199bSStefan Weinhuber cqr->retries = 256; 153040545573SHorst Hummel cqr->expires = 10*HZ; 15311aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 153240545573SHorst Hummel cqr->status = DASD_CQR_FILLED; 153340545573SHorst Hummel return cqr; 153440545573SHorst Hummel } 153540545573SHorst Hummel 153640545573SHorst Hummel /* 153740545573SHorst Hummel * Perform Subsystem Function. 153840545573SHorst Hummel * It is necessary to trigger CIO for channel revalidation since this 153940545573SHorst Hummel * call might change behaviour of DASD devices. 154040545573SHorst Hummel */ 154140545573SHorst Hummel static int 154212d7b107SStefan Haberland dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav, 154312d7b107SStefan Haberland unsigned long flags) 154440545573SHorst Hummel { 154540545573SHorst Hummel struct dasd_ccw_req *cqr; 154640545573SHorst Hummel int rc; 154740545573SHorst Hummel 1548f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_psf_ssc(device, enable_pav); 154940545573SHorst Hummel if (IS_ERR(cqr)) 155040545573SHorst Hummel return PTR_ERR(cqr); 155140545573SHorst Hummel 155212d7b107SStefan Haberland /* 155312d7b107SStefan Haberland * set flags e.g. turn on failfast, to prevent blocking 155412d7b107SStefan Haberland * the calling function should handle failed requests 155512d7b107SStefan Haberland */ 155612d7b107SStefan Haberland cqr->flags |= flags; 155712d7b107SStefan Haberland 155840545573SHorst Hummel rc = dasd_sleep_on(cqr); 155940545573SHorst Hummel if (!rc) 156040545573SHorst Hummel /* trigger CIO to reprobe devices */ 156140545573SHorst Hummel css_schedule_reprobe(); 156212d7b107SStefan Haberland else if (cqr->intrc == -EAGAIN) 156312d7b107SStefan Haberland rc = -EAGAIN; 156412d7b107SStefan Haberland 15658e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 156640545573SHorst Hummel return rc; 156740545573SHorst Hummel } 156840545573SHorst Hummel 156940545573SHorst Hummel /* 157040545573SHorst Hummel * Valide storage server of current device. 157140545573SHorst Hummel */ 157212d7b107SStefan Haberland static int dasd_eckd_validate_server(struct dasd_device *device, 157312d7b107SStefan Haberland unsigned long flags) 157440545573SHorst Hummel { 1575543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1576543691a4SSebastian Ott int enable_pav, rc; 157740545573SHorst Hummel 1578f9f8d02fSStefan Haberland if (private->uid.type == UA_BASE_PAV_ALIAS || 1579f9f8d02fSStefan Haberland private->uid.type == UA_HYPER_PAV_ALIAS) 158012d7b107SStefan Haberland return 0; 158140545573SHorst Hummel if (dasd_nopav || MACHINE_IS_VM) 1582f3eb5384SStefan Weinhuber enable_pav = 0; 1583f3eb5384SStefan Weinhuber else 1584f3eb5384SStefan Weinhuber enable_pav = 1; 158512d7b107SStefan Haberland rc = dasd_eckd_psf_ssc(device, enable_pav, flags); 1586eb6e199bSStefan Weinhuber 158740545573SHorst Hummel /* may be requested feature is not available on server, 158840545573SHorst Hummel * therefore just report error and go ahead */ 1589b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " 1590b8ed5dd5SStefan Haberland "returned rc=%d", private->uid.ssid, rc); 159112d7b107SStefan Haberland return rc; 159240545573SHorst Hummel } 159340545573SHorst Hummel 1594f1633031SStefan Haberland /* 1595f1633031SStefan Haberland * worker to do a validate server in case of a lost pathgroup 1596f1633031SStefan Haberland */ 1597f1633031SStefan Haberland static void dasd_eckd_do_validate_server(struct work_struct *work) 1598f1633031SStefan Haberland { 1599f1633031SStefan Haberland struct dasd_device *device = container_of(work, struct dasd_device, 1600f1633031SStefan Haberland kick_validate); 1601ea4da6eaSStefan Haberland unsigned long flags = 0; 1602ea4da6eaSStefan Haberland 1603ea4da6eaSStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &flags); 1604ea4da6eaSStefan Haberland if (dasd_eckd_validate_server(device, flags) 160512d7b107SStefan Haberland == -EAGAIN) { 160612d7b107SStefan Haberland /* schedule worker again if failed */ 160712d7b107SStefan Haberland schedule_work(&device->kick_validate); 160812d7b107SStefan Haberland return; 160912d7b107SStefan Haberland } 161012d7b107SStefan Haberland 1611f1633031SStefan Haberland dasd_put_device(device); 1612f1633031SStefan Haberland } 1613f1633031SStefan Haberland 1614f1633031SStefan Haberland static void dasd_eckd_kick_validate_server(struct dasd_device *device) 1615f1633031SStefan Haberland { 1616f1633031SStefan Haberland dasd_get_device(device); 161725e2cf1cSStefan Haberland /* exit if device not online or in offline processing */ 161825e2cf1cSStefan Haberland if (test_bit(DASD_FLAG_OFFLINE, &device->flags) || 161925e2cf1cSStefan Haberland device->state < DASD_STATE_ONLINE) { 162025e2cf1cSStefan Haberland dasd_put_device(device); 162125e2cf1cSStefan Haberland return; 162225e2cf1cSStefan Haberland } 1623f1633031SStefan Haberland /* queue call to do_validate_server to the kernel event daemon. */ 1624f2608cd4SStefan Haberland if (!schedule_work(&device->kick_validate)) 1625f2608cd4SStefan Haberland dasd_put_device(device); 1626f1633031SStefan Haberland } 1627f1633031SStefan Haberland 162840545573SHorst Hummel /* 16293d052595SHorst Hummel * Check device characteristics. 16303d052595SHorst Hummel * If the device is accessible using ECKD discipline, the device is enabled. 16313d052595SHorst Hummel */ 16321da177e4SLinus Torvalds static int 16331da177e4SLinus Torvalds dasd_eckd_check_characteristics(struct dasd_device *device) 16341da177e4SLinus Torvalds { 1635543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 16368e09f215SStefan Weinhuber struct dasd_block *block; 16372dedf0d9SStefan Haberland struct dasd_uid temp_uid; 1638f9f8d02fSStefan Haberland int rc, i; 163933b62a30SStefan Weinhuber int readonly; 16407c8faa86SStefan Haberland unsigned long value; 16411da177e4SLinus Torvalds 1642f1633031SStefan Haberland /* setup work queue for validate server*/ 1643f1633031SStefan Haberland INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server); 164459a9ed5fSStefan Haberland /* setup work queue for summary unit check */ 164559a9ed5fSStefan Haberland INIT_WORK(&device->suc_work, dasd_alias_handle_summary_unit_check); 1646f1633031SStefan Haberland 1647454e1fa1SPeter Oberparleiter if (!ccw_device_is_pathgroup(device->cdev)) { 1648454e1fa1SPeter Oberparleiter dev_warn(&device->cdev->dev, 1649454e1fa1SPeter Oberparleiter "A channel path group could not be established\n"); 1650454e1fa1SPeter Oberparleiter return -EIO; 1651454e1fa1SPeter Oberparleiter } 1652454e1fa1SPeter Oberparleiter if (!ccw_device_is_multipath(device->cdev)) { 1653454e1fa1SPeter Oberparleiter dev_info(&device->cdev->dev, 1654454e1fa1SPeter Oberparleiter "The DASD is not operating in multipath mode\n"); 1655454e1fa1SPeter Oberparleiter } 165692636b15SSebastian Ott if (!private) { 165792636b15SSebastian Ott private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); 165892636b15SSebastian Ott if (!private) { 1659fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1660fc19f381SStefan Haberland "Allocating memory for private DASD data " 1661fc19f381SStefan Haberland "failed\n"); 16621da177e4SLinus Torvalds return -ENOMEM; 16631da177e4SLinus Torvalds } 1664543691a4SSebastian Ott device->private = private; 166592636b15SSebastian Ott } else { 166692636b15SSebastian Ott memset(private, 0, sizeof(*private)); 16671da177e4SLinus Torvalds } 16681da177e4SLinus Torvalds /* Invalidate status of initial analysis. */ 16691da177e4SLinus Torvalds private->init_cqr_status = -1; 16701da177e4SLinus Torvalds /* Set default cache operations. */ 16711da177e4SLinus Torvalds private->attrib.operation = DASD_NORMAL_CACHE; 16721da177e4SLinus Torvalds private->attrib.nr_cyl = 0; 16731da177e4SLinus Torvalds 167440545573SHorst Hummel /* Read Configuration Data */ 167540545573SHorst Hummel rc = dasd_eckd_read_conf(device); 167640545573SHorst Hummel if (rc) 16778e09f215SStefan Weinhuber goto out_err1; 167840545573SHorst Hummel 1679a521b048SStefan Haberland /* set some default values */ 16807c8faa86SStefan Haberland device->default_expires = DASD_EXPIRES; 16811f1ee9adSHannes Reinecke device->default_retries = DASD_RETRIES; 1682a521b048SStefan Haberland device->path_thrhld = DASD_ECKD_PATH_THRHLD; 1683a521b048SStefan Haberland device->path_interval = DASD_ECKD_PATH_INTERVAL; 16841f1ee9adSHannes Reinecke 16857c8faa86SStefan Haberland if (private->gneq) { 16867c8faa86SStefan Haberland value = 1; 16877c8faa86SStefan Haberland for (i = 0; i < private->gneq->timeout.value; i++) 16887c8faa86SStefan Haberland value = 10 * value; 16897c8faa86SStefan Haberland value = value * private->gneq->timeout.number; 16907c8faa86SStefan Haberland /* do not accept useless values */ 16917c8faa86SStefan Haberland if (value != 0 && value <= DASD_EXPIRES_MAX) 16927c8faa86SStefan Haberland device->default_expires = value; 16937c8faa86SStefan Haberland } 16947c8faa86SStefan Haberland 16952dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 16962dedf0d9SStefan Haberland if (temp_uid.type == UA_BASE_DEVICE) { 16978e09f215SStefan Weinhuber block = dasd_alloc_block(); 16988e09f215SStefan Weinhuber if (IS_ERR(block)) { 1699b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1700b8ed5dd5SStefan Haberland "could not allocate dasd " 1701b8ed5dd5SStefan Haberland "block structure"); 17028e09f215SStefan Weinhuber rc = PTR_ERR(block); 17038e09f215SStefan Weinhuber goto out_err1; 17048e09f215SStefan Weinhuber } 17058e09f215SStefan Weinhuber device->block = block; 17068e09f215SStefan Weinhuber block->base = device; 17078e09f215SStefan Weinhuber } 17088e09f215SStefan Weinhuber 1709f9f8d02fSStefan Haberland /* register lcu with alias handling, enable PAV */ 1710f9f8d02fSStefan Haberland rc = dasd_alias_make_device_known_to_lcu(device); 1711f9f8d02fSStefan Haberland if (rc) 17128e09f215SStefan Weinhuber goto out_err2; 1713f9f8d02fSStefan Haberland 171412d7b107SStefan Haberland dasd_eckd_validate_server(device, 0); 1715f4ac1d02SStefan Weinhuber 1716f4ac1d02SStefan Weinhuber /* device may report different configuration data after LCU setup */ 1717f4ac1d02SStefan Weinhuber rc = dasd_eckd_read_conf(device); 171840545573SHorst Hummel if (rc) 17198e09f215SStefan Weinhuber goto out_err3; 17208e09f215SStefan Weinhuber 17218e09f215SStefan Weinhuber /* Read Feature Codes */ 172268d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 172340545573SHorst Hummel 17241da177e4SLinus Torvalds /* Read Device Characteristics */ 172568b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 172668b781feSStefan Haberland &private->rdc_data, 64); 17278e09f215SStefan Weinhuber if (rc) { 1728b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1729b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 17308e09f215SStefan Weinhuber goto out_err3; 17318e09f215SStefan Weinhuber } 173234cd551aSStefan Haberland 173334cd551aSStefan Haberland if ((device->features & DASD_FEATURE_USERAW) && 173434cd551aSStefan Haberland !(private->rdc_data.facilities.RT_in_LR)) { 173534cd551aSStefan Haberland dev_err(&device->cdev->dev, "The storage server does not " 173634cd551aSStefan Haberland "support raw-track access\n"); 173734cd551aSStefan Haberland rc = -EINVAL; 173834cd551aSStefan Haberland goto out_err3; 173934cd551aSStefan Haberland } 174034cd551aSStefan Haberland 1741817f2c84SNikanth Karthikesan /* find the valid cylinder size */ 1742b44b0ab3SStefan Weinhuber if (private->rdc_data.no_cyl == LV_COMPAT_CYL && 1743b44b0ab3SStefan Weinhuber private->rdc_data.long_no_cyl) 1744b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.long_no_cyl; 1745b44b0ab3SStefan Weinhuber else 1746b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.no_cyl; 1747b44b0ab3SStefan Weinhuber 1748ef19298bSStefan Weinhuber private->fcx_max_data = get_fcx_max_data(device); 1749ef19298bSStefan Weinhuber 175033b62a30SStefan Weinhuber readonly = dasd_device_is_ro(device); 175133b62a30SStefan Weinhuber if (readonly) 175233b62a30SStefan Weinhuber set_bit(DASD_FLAG_DEVICE_RO, &device->flags); 175333b62a30SStefan Weinhuber 1754fc19f381SStefan Haberland dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " 175533b62a30SStefan Weinhuber "with %d cylinders, %d heads, %d sectors%s\n", 17561da177e4SLinus Torvalds private->rdc_data.dev_type, 17571da177e4SLinus Torvalds private->rdc_data.dev_model, 17581da177e4SLinus Torvalds private->rdc_data.cu_type, 17591da177e4SLinus Torvalds private->rdc_data.cu_model.model, 1760b44b0ab3SStefan Weinhuber private->real_cyl, 17611da177e4SLinus Torvalds private->rdc_data.trk_per_cyl, 176233b62a30SStefan Weinhuber private->rdc_data.sec_per_trk, 176333b62a30SStefan Weinhuber readonly ? ", read-only device" : ""); 17648e09f215SStefan Weinhuber return 0; 17658e09f215SStefan Weinhuber 17668e09f215SStefan Weinhuber out_err3: 17678e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 17688e09f215SStefan Weinhuber out_err2: 17698e09f215SStefan Weinhuber dasd_free_block(device->block); 17708e09f215SStefan Weinhuber device->block = NULL; 17718e09f215SStefan Weinhuber out_err1: 17724abb08c2SStefan Weinhuber kfree(private->conf_data); 17738e09f215SStefan Weinhuber kfree(device->private); 17748e09f215SStefan Weinhuber device->private = NULL; 17753d052595SHorst Hummel return rc; 17761da177e4SLinus Torvalds } 17771da177e4SLinus Torvalds 17788e09f215SStefan Weinhuber static void dasd_eckd_uncheck_device(struct dasd_device *device) 17798e09f215SStefan Weinhuber { 1780543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1781b179b037SStefan Haberland int i; 17824abb08c2SStefan Weinhuber 17837c6553d4SStefan Haberland if (!private) 17847c6553d4SStefan Haberland return; 17857c6553d4SStefan Haberland 17868e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 17874abb08c2SStefan Weinhuber private->ned = NULL; 17884abb08c2SStefan Weinhuber private->sneq = NULL; 17894abb08c2SStefan Weinhuber private->vdsneq = NULL; 17904abb08c2SStefan Weinhuber private->gneq = NULL; 17914abb08c2SStefan Weinhuber private->conf_len = 0; 1792b179b037SStefan Haberland for (i = 0; i < 8; i++) { 1793c9346151SStefan Haberland kfree(device->path[i].conf_data); 1794c9346151SStefan Haberland if ((__u8 *)device->path[i].conf_data == 1795b179b037SStefan Haberland private->conf_data) { 1796b179b037SStefan Haberland private->conf_data = NULL; 1797b179b037SStefan Haberland private->conf_len = 0; 1798b179b037SStefan Haberland } 1799c9346151SStefan Haberland device->path[i].conf_data = NULL; 1800a521b048SStefan Haberland device->path[i].cssid = 0; 1801a521b048SStefan Haberland device->path[i].ssid = 0; 1802a521b048SStefan Haberland device->path[i].chpid = 0; 1803b179b037SStefan Haberland } 18044abb08c2SStefan Weinhuber kfree(private->conf_data); 18054abb08c2SStefan Weinhuber private->conf_data = NULL; 18068e09f215SStefan Weinhuber } 18078e09f215SStefan Weinhuber 18081da177e4SLinus Torvalds static struct dasd_ccw_req * 18091da177e4SLinus Torvalds dasd_eckd_analysis_ccw(struct dasd_device *device) 18101da177e4SLinus Torvalds { 1811543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 18121da177e4SLinus Torvalds struct eckd_count *count_data; 18131da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 18141da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 18151da177e4SLinus Torvalds struct ccw1 *ccw; 18161da177e4SLinus Torvalds int cplength, datasize; 18171da177e4SLinus Torvalds int i; 18181da177e4SLinus Torvalds 18191da177e4SLinus Torvalds cplength = 8; 18201da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 1821c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device, 1822c5205f2fSSebastian Ott NULL); 18231da177e4SLinus Torvalds if (IS_ERR(cqr)) 18241da177e4SLinus Torvalds return cqr; 18251da177e4SLinus Torvalds ccw = cqr->cpaddr; 18261da177e4SLinus Torvalds /* Define extent for the first 3 tracks. */ 18271da177e4SLinus Torvalds define_extent(ccw++, cqr->data, 0, 2, 182845f186beSJan Höppner DASD_ECKD_CCW_READ_COUNT, device, 0); 18291da177e4SLinus Torvalds LO_data = cqr->data + sizeof(struct DE_eckd_data); 18301da177e4SLinus Torvalds /* Locate record for the first 4 records on track 0. */ 18311da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18321da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 0, 0, 4, 18331da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 18341da177e4SLinus Torvalds 18351da177e4SLinus Torvalds count_data = private->count_area; 18361da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 18371da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18381da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 18391da177e4SLinus Torvalds ccw->flags = 0; 18401da177e4SLinus Torvalds ccw->count = 8; 18411da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 18421da177e4SLinus Torvalds ccw++; 18431da177e4SLinus Torvalds count_data++; 18441da177e4SLinus Torvalds } 18451da177e4SLinus Torvalds 18461da177e4SLinus Torvalds /* Locate record for the first record on track 2. */ 18471da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18481da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 2, 0, 1, 18491da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 18501da177e4SLinus Torvalds /* Read count ccw. */ 18511da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18521da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 18531da177e4SLinus Torvalds ccw->flags = 0; 18541da177e4SLinus Torvalds ccw->count = 8; 18551da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 18561da177e4SLinus Torvalds 18578e09f215SStefan Weinhuber cqr->block = NULL; 18588e09f215SStefan Weinhuber cqr->startdev = device; 18598e09f215SStefan Weinhuber cqr->memdev = device; 1860eb6e199bSStefan Weinhuber cqr->retries = 255; 18611aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 18621da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 18631da177e4SLinus Torvalds return cqr; 18641da177e4SLinus Torvalds } 18651da177e4SLinus Torvalds 1866eb6e199bSStefan Weinhuber /* differentiate between 'no record found' and any other error */ 1867eb6e199bSStefan Weinhuber static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) 1868eb6e199bSStefan Weinhuber { 1869eb6e199bSStefan Weinhuber char *sense; 1870eb6e199bSStefan Weinhuber if (init_cqr->status == DASD_CQR_DONE) 1871eb6e199bSStefan Weinhuber return INIT_CQR_OK; 1872eb6e199bSStefan Weinhuber else if (init_cqr->status == DASD_CQR_NEED_ERP || 1873eb6e199bSStefan Weinhuber init_cqr->status == DASD_CQR_FAILED) { 1874eb6e199bSStefan Weinhuber sense = dasd_get_sense(&init_cqr->irb); 1875eb6e199bSStefan Weinhuber if (sense && (sense[1] & SNS1_NO_REC_FOUND)) 1876eb6e199bSStefan Weinhuber return INIT_CQR_UNFORMATTED; 1877eb6e199bSStefan Weinhuber else 1878eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 1879eb6e199bSStefan Weinhuber } else 1880eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 1881eb6e199bSStefan Weinhuber } 1882eb6e199bSStefan Weinhuber 18831da177e4SLinus Torvalds /* 18841da177e4SLinus Torvalds * This is the callback function for the init_analysis cqr. It saves 18851da177e4SLinus Torvalds * the status of the initial analysis ccw before it frees it and kicks 18861da177e4SLinus Torvalds * the device to continue the startup sequence. This will call 18871da177e4SLinus Torvalds * dasd_eckd_do_analysis again (if the devices has not been marked 18881da177e4SLinus Torvalds * for deletion in the meantime). 18891da177e4SLinus Torvalds */ 1890eb6e199bSStefan Weinhuber static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, 1891eb6e199bSStefan Weinhuber void *data) 18921da177e4SLinus Torvalds { 1893543691a4SSebastian Ott struct dasd_device *device = init_cqr->startdev; 1894543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 18951da177e4SLinus Torvalds 1896eb6e199bSStefan Weinhuber private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); 18971da177e4SLinus Torvalds dasd_sfree_request(init_cqr, device); 18981da177e4SLinus Torvalds dasd_kick_device(device); 18991da177e4SLinus Torvalds } 19001da177e4SLinus Torvalds 1901eb6e199bSStefan Weinhuber static int dasd_eckd_start_analysis(struct dasd_block *block) 19021da177e4SLinus Torvalds { 19031da177e4SLinus Torvalds struct dasd_ccw_req *init_cqr; 19041da177e4SLinus Torvalds 19058e09f215SStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(block->base); 19061da177e4SLinus Torvalds if (IS_ERR(init_cqr)) 19071da177e4SLinus Torvalds return PTR_ERR(init_cqr); 19081da177e4SLinus Torvalds init_cqr->callback = dasd_eckd_analysis_callback; 19091da177e4SLinus Torvalds init_cqr->callback_data = NULL; 19101da177e4SLinus Torvalds init_cqr->expires = 5*HZ; 1911eb6e199bSStefan Weinhuber /* first try without ERP, so we can later handle unformatted 1912eb6e199bSStefan Weinhuber * devices as special case 1913eb6e199bSStefan Weinhuber */ 1914eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); 1915eb6e199bSStefan Weinhuber init_cqr->retries = 0; 19161da177e4SLinus Torvalds dasd_add_request_head(init_cqr); 19171da177e4SLinus Torvalds return -EAGAIN; 19181da177e4SLinus Torvalds } 19191da177e4SLinus Torvalds 1920eb6e199bSStefan Weinhuber static int dasd_eckd_end_analysis(struct dasd_block *block) 19211da177e4SLinus Torvalds { 1922543691a4SSebastian Ott struct dasd_device *device = block->base; 1923543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 19241da177e4SLinus Torvalds struct eckd_count *count_area; 19251da177e4SLinus Torvalds unsigned int sb, blk_per_trk; 19261da177e4SLinus Torvalds int status, i; 1927eb6e199bSStefan Weinhuber struct dasd_ccw_req *init_cqr; 19281da177e4SLinus Torvalds 19291da177e4SLinus Torvalds status = private->init_cqr_status; 19301da177e4SLinus Torvalds private->init_cqr_status = -1; 1931eb6e199bSStefan Weinhuber if (status == INIT_CQR_ERROR) { 1932eb6e199bSStefan Weinhuber /* try again, this time with full ERP */ 1933eb6e199bSStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(device); 1934eb6e199bSStefan Weinhuber dasd_sleep_on(init_cqr); 1935eb6e199bSStefan Weinhuber status = dasd_eckd_analysis_evaluation(init_cqr); 1936eb6e199bSStefan Weinhuber dasd_sfree_request(init_cqr, device); 1937eb6e199bSStefan Weinhuber } 1938eb6e199bSStefan Weinhuber 1939e4dbb0f2SStefan Haberland if (device->features & DASD_FEATURE_USERAW) { 1940e4dbb0f2SStefan Haberland block->bp_block = DASD_RAW_BLOCKSIZE; 1941e4dbb0f2SStefan Haberland blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; 1942e4dbb0f2SStefan Haberland block->s2b_shift = 3; 1943e4dbb0f2SStefan Haberland goto raw; 1944e4dbb0f2SStefan Haberland } 1945e4dbb0f2SStefan Haberland 1946eb6e199bSStefan Weinhuber if (status == INIT_CQR_UNFORMATTED) { 1947eb6e199bSStefan Weinhuber dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); 19481da177e4SLinus Torvalds return -EMEDIUMTYPE; 1949eb6e199bSStefan Weinhuber } else if (status == INIT_CQR_ERROR) { 1950eb6e199bSStefan Weinhuber dev_err(&device->cdev->dev, 1951eb6e199bSStefan Weinhuber "Detecting the DASD disk layout failed because " 1952eb6e199bSStefan Weinhuber "of an I/O error\n"); 1953eb6e199bSStefan Weinhuber return -EIO; 19541da177e4SLinus Torvalds } 19551da177e4SLinus Torvalds 19561da177e4SLinus Torvalds private->uses_cdl = 1; 19571da177e4SLinus Torvalds /* Check Track 0 for Compatible Disk Layout */ 19581da177e4SLinus Torvalds count_area = NULL; 19591da177e4SLinus Torvalds for (i = 0; i < 3; i++) { 19601da177e4SLinus Torvalds if (private->count_area[i].kl != 4 || 19613bc9fef9SStefan Haberland private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 || 19623bc9fef9SStefan Haberland private->count_area[i].cyl != 0 || 19633bc9fef9SStefan Haberland private->count_area[i].head != count_area_head[i] || 19643bc9fef9SStefan Haberland private->count_area[i].record != count_area_rec[i]) { 19651da177e4SLinus Torvalds private->uses_cdl = 0; 19661da177e4SLinus Torvalds break; 19671da177e4SLinus Torvalds } 19681da177e4SLinus Torvalds } 19691da177e4SLinus Torvalds if (i == 3) 19701da177e4SLinus Torvalds count_area = &private->count_area[4]; 19711da177e4SLinus Torvalds 19721da177e4SLinus Torvalds if (private->uses_cdl == 0) { 19731da177e4SLinus Torvalds for (i = 0; i < 5; i++) { 19741da177e4SLinus Torvalds if ((private->count_area[i].kl != 0) || 19751da177e4SLinus Torvalds (private->count_area[i].dl != 19763bc9fef9SStefan Haberland private->count_area[0].dl) || 19773bc9fef9SStefan Haberland private->count_area[i].cyl != 0 || 19783bc9fef9SStefan Haberland private->count_area[i].head != count_area_head[i] || 19793bc9fef9SStefan Haberland private->count_area[i].record != count_area_rec[i]) 19801da177e4SLinus Torvalds break; 19811da177e4SLinus Torvalds } 19821da177e4SLinus Torvalds if (i == 5) 19831da177e4SLinus Torvalds count_area = &private->count_area[0]; 19841da177e4SLinus Torvalds } else { 19851da177e4SLinus Torvalds if (private->count_area[3].record == 1) 1986fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1987fc19f381SStefan Haberland "Track 0 has no records following the VTOC\n"); 19881da177e4SLinus Torvalds } 1989e4dbb0f2SStefan Haberland 19901da177e4SLinus Torvalds if (count_area != NULL && count_area->kl == 0) { 19911da177e4SLinus Torvalds /* we found notthing violating our disk layout */ 19921da177e4SLinus Torvalds if (dasd_check_blocksize(count_area->dl) == 0) 19938e09f215SStefan Weinhuber block->bp_block = count_area->dl; 19941da177e4SLinus Torvalds } 19958e09f215SStefan Weinhuber if (block->bp_block == 0) { 1996fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1997fc19f381SStefan Haberland "The disk layout of the DASD is not supported\n"); 19981da177e4SLinus Torvalds return -EMEDIUMTYPE; 19991da177e4SLinus Torvalds } 20008e09f215SStefan Weinhuber block->s2b_shift = 0; /* bits to shift 512 to get a block */ 20018e09f215SStefan Weinhuber for (sb = 512; sb < block->bp_block; sb = sb << 1) 20028e09f215SStefan Weinhuber block->s2b_shift++; 20031da177e4SLinus Torvalds 20048e09f215SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 2005e4dbb0f2SStefan Haberland 2006e4dbb0f2SStefan Haberland raw: 20072cc9637cSPeter Oberparleiter block->blocks = ((unsigned long) private->real_cyl * 20081da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 20091da177e4SLinus Torvalds blk_per_trk); 20101da177e4SLinus Torvalds 2011fc19f381SStefan Haberland dev_info(&device->cdev->dev, 20122cc9637cSPeter Oberparleiter "DASD with %u KB/block, %lu KB total size, %u KB/track, " 2013fc19f381SStefan Haberland "%s\n", (block->bp_block >> 10), 20142cc9637cSPeter Oberparleiter (((unsigned long) private->real_cyl * 20151da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 20168e09f215SStefan Weinhuber blk_per_trk * (block->bp_block >> 9)) >> 1), 20178e09f215SStefan Weinhuber ((blk_per_trk * block->bp_block) >> 10), 20181da177e4SLinus Torvalds private->uses_cdl ? 20191da177e4SLinus Torvalds "compatible disk layout" : "linux disk layout"); 20201da177e4SLinus Torvalds 20211da177e4SLinus Torvalds return 0; 20221da177e4SLinus Torvalds } 20231da177e4SLinus Torvalds 20248e09f215SStefan Weinhuber static int dasd_eckd_do_analysis(struct dasd_block *block) 20251da177e4SLinus Torvalds { 2026543691a4SSebastian Ott struct dasd_eckd_private *private = block->base->private; 20271da177e4SLinus Torvalds 20281da177e4SLinus Torvalds if (private->init_cqr_status < 0) 20298e09f215SStefan Weinhuber return dasd_eckd_start_analysis(block); 20301da177e4SLinus Torvalds else 20318e09f215SStefan Weinhuber return dasd_eckd_end_analysis(block); 20321da177e4SLinus Torvalds } 20331da177e4SLinus Torvalds 2034d42e1712SStefan Haberland static int dasd_eckd_basic_to_ready(struct dasd_device *device) 20358e09f215SStefan Weinhuber { 20368e09f215SStefan Weinhuber return dasd_alias_add_device(device); 20378e09f215SStefan Weinhuber }; 20388e09f215SStefan Weinhuber 20398e09f215SStefan Weinhuber static int dasd_eckd_online_to_ready(struct dasd_device *device) 20408e09f215SStefan Weinhuber { 2041669f3765SStefan Haberland if (cancel_work_sync(&device->reload_device)) 2042669f3765SStefan Haberland dasd_put_device(device); 2043669f3765SStefan Haberland if (cancel_work_sync(&device->kick_validate)) 2044669f3765SStefan Haberland dasd_put_device(device); 2045669f3765SStefan Haberland 2046d42e1712SStefan Haberland return 0; 2047d42e1712SStefan Haberland }; 2048d42e1712SStefan Haberland 2049daa991bfSStefan Haberland static int dasd_eckd_basic_to_known(struct dasd_device *device) 2050d42e1712SStefan Haberland { 20518e09f215SStefan Weinhuber return dasd_alias_remove_device(device); 20528e09f215SStefan Weinhuber }; 20538e09f215SStefan Weinhuber 20541da177e4SLinus Torvalds static int 20558e09f215SStefan Weinhuber dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 20561da177e4SLinus Torvalds { 2057543691a4SSebastian Ott struct dasd_eckd_private *private = block->base->private; 20581da177e4SLinus Torvalds 20598e09f215SStefan Weinhuber if (dasd_check_blocksize(block->bp_block) == 0) { 20601da177e4SLinus Torvalds geo->sectors = recs_per_track(&private->rdc_data, 20618e09f215SStefan Weinhuber 0, block->bp_block); 20621da177e4SLinus Torvalds } 20631da177e4SLinus Torvalds geo->cylinders = private->rdc_data.no_cyl; 20641da177e4SLinus Torvalds geo->heads = private->rdc_data.trk_per_cyl; 20651da177e4SLinus Torvalds return 0; 20661da177e4SLinus Torvalds } 20671da177e4SLinus Torvalds 20688fd57520SJan Höppner /* 20698fd57520SJan Höppner * Build the TCW request for the format check 20708fd57520SJan Höppner */ 20718fd57520SJan Höppner static struct dasd_ccw_req * 20728fd57520SJan Höppner dasd_eckd_build_check_tcw(struct dasd_device *base, struct format_data_t *fdata, 20738fd57520SJan Höppner int enable_pav, struct eckd_count *fmt_buffer, 20748fd57520SJan Höppner int rpt) 20758fd57520SJan Höppner { 20768fd57520SJan Höppner struct dasd_eckd_private *start_priv; 20778fd57520SJan Höppner struct dasd_device *startdev = NULL; 20788fd57520SJan Höppner struct tidaw *last_tidaw = NULL; 20798fd57520SJan Höppner struct dasd_ccw_req *cqr; 20808fd57520SJan Höppner struct itcw *itcw; 20818fd57520SJan Höppner int itcw_size; 20828fd57520SJan Höppner int count; 20838fd57520SJan Höppner int rc; 20848fd57520SJan Höppner int i; 20858fd57520SJan Höppner 20868fd57520SJan Höppner if (enable_pav) 20878fd57520SJan Höppner startdev = dasd_alias_get_start_dev(base); 20888fd57520SJan Höppner 20898fd57520SJan Höppner if (!startdev) 20908fd57520SJan Höppner startdev = base; 20918fd57520SJan Höppner 20928fd57520SJan Höppner start_priv = startdev->private; 20938fd57520SJan Höppner 20948fd57520SJan Höppner count = rpt * (fdata->stop_unit - fdata->start_unit + 1); 20958fd57520SJan Höppner 20968fd57520SJan Höppner /* 20978fd57520SJan Höppner * we're adding 'count' amount of tidaw to the itcw. 20988fd57520SJan Höppner * calculate the corresponding itcw_size 20998fd57520SJan Höppner */ 21008fd57520SJan Höppner itcw_size = itcw_calc_size(0, count, 0); 21018fd57520SJan Höppner 2102c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev, 2103c5205f2fSSebastian Ott NULL); 21048fd57520SJan Höppner if (IS_ERR(cqr)) 21058fd57520SJan Höppner return cqr; 21068fd57520SJan Höppner 21078fd57520SJan Höppner start_priv->count++; 21088fd57520SJan Höppner 21098fd57520SJan Höppner itcw = itcw_init(cqr->data, itcw_size, ITCW_OP_READ, 0, count, 0); 21108fd57520SJan Höppner if (IS_ERR(itcw)) { 21118fd57520SJan Höppner rc = -EINVAL; 21128fd57520SJan Höppner goto out_err; 21138fd57520SJan Höppner } 21148fd57520SJan Höppner 21158fd57520SJan Höppner cqr->cpaddr = itcw_get_tcw(itcw); 21168fd57520SJan Höppner rc = prepare_itcw(itcw, fdata->start_unit, fdata->stop_unit, 21178fd57520SJan Höppner DASD_ECKD_CCW_READ_COUNT_MT, base, startdev, 0, count, 21188fd57520SJan Höppner sizeof(struct eckd_count), 21198fd57520SJan Höppner count * sizeof(struct eckd_count), 0, rpt); 21208fd57520SJan Höppner if (rc) 21218fd57520SJan Höppner goto out_err; 21228fd57520SJan Höppner 21238fd57520SJan Höppner for (i = 0; i < count; i++) { 21248fd57520SJan Höppner last_tidaw = itcw_add_tidaw(itcw, 0, fmt_buffer++, 21258fd57520SJan Höppner sizeof(struct eckd_count)); 21268fd57520SJan Höppner if (IS_ERR(last_tidaw)) { 21278fd57520SJan Höppner rc = -EINVAL; 21288fd57520SJan Höppner goto out_err; 21298fd57520SJan Höppner } 21308fd57520SJan Höppner } 21318fd57520SJan Höppner 21328fd57520SJan Höppner last_tidaw->flags |= TIDAW_FLAGS_LAST; 21338fd57520SJan Höppner itcw_finalize(itcw); 21348fd57520SJan Höppner 21358fd57520SJan Höppner cqr->cpmode = 1; 21368fd57520SJan Höppner cqr->startdev = startdev; 21378fd57520SJan Höppner cqr->memdev = startdev; 21388fd57520SJan Höppner cqr->basedev = base; 21398fd57520SJan Höppner cqr->retries = startdev->default_retries; 21408fd57520SJan Höppner cqr->expires = startdev->default_expires * HZ; 21418fd57520SJan Höppner cqr->buildclk = get_tod_clock(); 21428fd57520SJan Höppner cqr->status = DASD_CQR_FILLED; 21438fd57520SJan Höppner /* Set flags to suppress output for expected errors */ 21448fd57520SJan Höppner set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); 21458fd57520SJan Höppner set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); 21468fd57520SJan Höppner 21478fd57520SJan Höppner return cqr; 21488fd57520SJan Höppner 21498fd57520SJan Höppner out_err: 21508fd57520SJan Höppner dasd_sfree_request(cqr, startdev); 21518fd57520SJan Höppner 21528fd57520SJan Höppner return ERR_PTR(rc); 21538fd57520SJan Höppner } 21548fd57520SJan Höppner 21558fd57520SJan Höppner /* 21568fd57520SJan Höppner * Build the CCW request for the format check 21578fd57520SJan Höppner */ 21588fd57520SJan Höppner static struct dasd_ccw_req * 21598fd57520SJan Höppner dasd_eckd_build_check(struct dasd_device *base, struct format_data_t *fdata, 21608fd57520SJan Höppner int enable_pav, struct eckd_count *fmt_buffer, int rpt) 21618fd57520SJan Höppner { 21628fd57520SJan Höppner struct dasd_eckd_private *start_priv; 21638fd57520SJan Höppner struct dasd_eckd_private *base_priv; 21648fd57520SJan Höppner struct dasd_device *startdev = NULL; 21658fd57520SJan Höppner struct dasd_ccw_req *cqr; 21668fd57520SJan Höppner struct ccw1 *ccw; 21678fd57520SJan Höppner void *data; 21688fd57520SJan Höppner int cplength, datasize; 21698fd57520SJan Höppner int use_prefix; 21708fd57520SJan Höppner int count; 21718fd57520SJan Höppner int i; 21728fd57520SJan Höppner 21738fd57520SJan Höppner if (enable_pav) 21748fd57520SJan Höppner startdev = dasd_alias_get_start_dev(base); 21758fd57520SJan Höppner 21768fd57520SJan Höppner if (!startdev) 21778fd57520SJan Höppner startdev = base; 21788fd57520SJan Höppner 21798fd57520SJan Höppner start_priv = startdev->private; 21808fd57520SJan Höppner base_priv = base->private; 21818fd57520SJan Höppner 21828fd57520SJan Höppner count = rpt * (fdata->stop_unit - fdata->start_unit + 1); 21838fd57520SJan Höppner 21848fd57520SJan Höppner use_prefix = base_priv->features.feature[8] & 0x01; 21858fd57520SJan Höppner 21868fd57520SJan Höppner if (use_prefix) { 21878fd57520SJan Höppner cplength = 1; 21888fd57520SJan Höppner datasize = sizeof(struct PFX_eckd_data); 21898fd57520SJan Höppner } else { 21908fd57520SJan Höppner cplength = 2; 21918fd57520SJan Höppner datasize = sizeof(struct DE_eckd_data) + 21928fd57520SJan Höppner sizeof(struct LO_eckd_data); 21938fd57520SJan Höppner } 21948fd57520SJan Höppner cplength += count; 21958fd57520SJan Höppner 21968fd57520SJan Höppner cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 2197c5205f2fSSebastian Ott startdev, NULL); 21988fd57520SJan Höppner if (IS_ERR(cqr)) 21998fd57520SJan Höppner return cqr; 22008fd57520SJan Höppner 22018fd57520SJan Höppner start_priv->count++; 22028fd57520SJan Höppner data = cqr->data; 22038fd57520SJan Höppner ccw = cqr->cpaddr; 22048fd57520SJan Höppner 22058fd57520SJan Höppner if (use_prefix) { 22068fd57520SJan Höppner prefix_LRE(ccw++, data, fdata->start_unit, fdata->stop_unit, 22078fd57520SJan Höppner DASD_ECKD_CCW_READ_COUNT, base, startdev, 1, 0, 22088fd57520SJan Höppner count, 0, 0); 22098fd57520SJan Höppner } else { 22108fd57520SJan Höppner define_extent(ccw++, data, fdata->start_unit, fdata->stop_unit, 221145f186beSJan Höppner DASD_ECKD_CCW_READ_COUNT, startdev, 0); 22128fd57520SJan Höppner 22138fd57520SJan Höppner data += sizeof(struct DE_eckd_data); 22148fd57520SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 22158fd57520SJan Höppner 22168fd57520SJan Höppner locate_record(ccw++, data, fdata->start_unit, 0, count, 22178fd57520SJan Höppner DASD_ECKD_CCW_READ_COUNT, base, 0); 22188fd57520SJan Höppner } 22198fd57520SJan Höppner 22208fd57520SJan Höppner for (i = 0; i < count; i++) { 22218fd57520SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 22228fd57520SJan Höppner ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 22238fd57520SJan Höppner ccw->flags = CCW_FLAG_SLI; 22248fd57520SJan Höppner ccw->count = 8; 22258fd57520SJan Höppner ccw->cda = (__u32)(addr_t) fmt_buffer; 22268fd57520SJan Höppner ccw++; 22278fd57520SJan Höppner fmt_buffer++; 22288fd57520SJan Höppner } 22298fd57520SJan Höppner 22308fd57520SJan Höppner cqr->startdev = startdev; 22318fd57520SJan Höppner cqr->memdev = startdev; 22328fd57520SJan Höppner cqr->basedev = base; 22338fd57520SJan Höppner cqr->retries = DASD_RETRIES; 22348fd57520SJan Höppner cqr->expires = startdev->default_expires * HZ; 22358fd57520SJan Höppner cqr->buildclk = get_tod_clock(); 22368fd57520SJan Höppner cqr->status = DASD_CQR_FILLED; 22378fd57520SJan Höppner /* Set flags to suppress output for expected errors */ 22388fd57520SJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 22398fd57520SJan Höppner 22408fd57520SJan Höppner return cqr; 22418fd57520SJan Höppner } 22428fd57520SJan Höppner 22431da177e4SLinus Torvalds static struct dasd_ccw_req * 2244d42e1712SStefan Haberland dasd_eckd_build_format(struct dasd_device *base, 224529b8dd9dSStefan Haberland struct format_data_t *fdata, 2246a94fa154SStefan Haberland int enable_pav) 22471da177e4SLinus Torvalds { 2248d42e1712SStefan Haberland struct dasd_eckd_private *base_priv; 2249d42e1712SStefan Haberland struct dasd_eckd_private *start_priv; 225029b8dd9dSStefan Haberland struct dasd_device *startdev = NULL; 22511da177e4SLinus Torvalds struct dasd_ccw_req *fcp; 22521da177e4SLinus Torvalds struct eckd_count *ect; 2253d42e1712SStefan Haberland struct ch_t address; 22541da177e4SLinus Torvalds struct ccw1 *ccw; 22551da177e4SLinus Torvalds void *data; 2256b44b0ab3SStefan Weinhuber int rpt; 22571da177e4SLinus Torvalds int cplength, datasize; 2258d42e1712SStefan Haberland int i, j; 2259f9a28f7bSJean-Baptiste Joret int intensity = 0; 2260f9a28f7bSJean-Baptiste Joret int r0_perm; 2261d42e1712SStefan Haberland int nr_tracks; 226218d6624eSStefan Haberland int use_prefix; 22631da177e4SLinus Torvalds 2264a94fa154SStefan Haberland if (enable_pav) 2265d42e1712SStefan Haberland startdev = dasd_alias_get_start_dev(base); 226629b8dd9dSStefan Haberland 2267d42e1712SStefan Haberland if (!startdev) 2268d42e1712SStefan Haberland startdev = base; 22691da177e4SLinus Torvalds 2270543691a4SSebastian Ott start_priv = startdev->private; 2271543691a4SSebastian Ott base_priv = base->private; 2272d42e1712SStefan Haberland 2273d42e1712SStefan Haberland rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize); 2274d42e1712SStefan Haberland 2275d42e1712SStefan Haberland nr_tracks = fdata->stop_unit - fdata->start_unit + 1; 22761da177e4SLinus Torvalds 22771da177e4SLinus Torvalds /* 22781da177e4SLinus Torvalds * fdata->intensity is a bit string that tells us what to do: 22791da177e4SLinus Torvalds * Bit 0: write record zero 22801da177e4SLinus Torvalds * Bit 1: write home address, currently not supported 22811da177e4SLinus Torvalds * Bit 2: invalidate tracks 22821da177e4SLinus Torvalds * Bit 3: use OS/390 compatible disk layout (cdl) 2283f9a28f7bSJean-Baptiste Joret * Bit 4: do not allow storage subsystem to modify record zero 22841da177e4SLinus Torvalds * Only some bit combinations do make sense. 22851da177e4SLinus Torvalds */ 2286f9a28f7bSJean-Baptiste Joret if (fdata->intensity & 0x10) { 2287f9a28f7bSJean-Baptiste Joret r0_perm = 0; 2288f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity & ~0x10; 2289f9a28f7bSJean-Baptiste Joret } else { 2290f9a28f7bSJean-Baptiste Joret r0_perm = 1; 2291f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity; 2292f9a28f7bSJean-Baptiste Joret } 2293d42e1712SStefan Haberland 229418d6624eSStefan Haberland use_prefix = base_priv->features.feature[8] & 0x01; 229518d6624eSStefan Haberland 2296f9a28f7bSJean-Baptiste Joret switch (intensity) { 22971da177e4SLinus Torvalds case 0x00: /* Normal format */ 22981da177e4SLinus Torvalds case 0x08: /* Normal format, use cdl. */ 2299d42e1712SStefan Haberland cplength = 2 + (rpt*nr_tracks); 230018d6624eSStefan Haberland if (use_prefix) 2301d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 23021da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 2303d42e1712SStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 230418d6624eSStefan Haberland else 230518d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 230618d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 230718d6624eSStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 23081da177e4SLinus Torvalds break; 23091da177e4SLinus Torvalds case 0x01: /* Write record zero and format track. */ 23101da177e4SLinus Torvalds case 0x09: /* Write record zero and format track, use cdl. */ 2311d42e1712SStefan Haberland cplength = 2 + rpt * nr_tracks; 231218d6624eSStefan Haberland if (use_prefix) 2313d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 23141da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 23151da177e4SLinus Torvalds sizeof(struct eckd_count) + 2316d42e1712SStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 231718d6624eSStefan Haberland else 231818d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 231918d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 232018d6624eSStefan Haberland sizeof(struct eckd_count) + 232118d6624eSStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 23221da177e4SLinus Torvalds break; 23231da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 23241da177e4SLinus Torvalds case 0x0c: /* Invalidate track, use cdl. */ 23251da177e4SLinus Torvalds cplength = 3; 232618d6624eSStefan Haberland if (use_prefix) 2327d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 23281da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 23291da177e4SLinus Torvalds sizeof(struct eckd_count); 233018d6624eSStefan Haberland else 233118d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 233218d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 233318d6624eSStefan Haberland sizeof(struct eckd_count); 23341da177e4SLinus Torvalds break; 23351da177e4SLinus Torvalds default: 2336d42e1712SStefan Haberland dev_warn(&startdev->cdev->dev, 2337d42e1712SStefan Haberland "An I/O control call used incorrect flags 0x%x\n", 2338d42e1712SStefan Haberland fdata->intensity); 23391da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 23401da177e4SLinus Torvalds } 23411da177e4SLinus Torvalds /* Allocate the format ccw request. */ 2342d42e1712SStefan Haberland fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 2343c5205f2fSSebastian Ott datasize, startdev, NULL); 23441da177e4SLinus Torvalds if (IS_ERR(fcp)) 23451da177e4SLinus Torvalds return fcp; 23461da177e4SLinus Torvalds 2347d42e1712SStefan Haberland start_priv->count++; 23481da177e4SLinus Torvalds data = fcp->data; 23491da177e4SLinus Torvalds ccw = fcp->cpaddr; 23501da177e4SLinus Torvalds 2351f9a28f7bSJean-Baptiste Joret switch (intensity & ~0x08) { 23521da177e4SLinus Torvalds case 0x00: /* Normal format. */ 235318d6624eSStefan Haberland if (use_prefix) { 2354d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2355d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 2356d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2357f9a28f7bSJean-Baptiste Joret /* grant subsystem permission to format R0 */ 2358f9a28f7bSJean-Baptiste Joret if (r0_perm) 2359d42e1712SStefan Haberland ((struct PFX_eckd_data *)data) 2360d42e1712SStefan Haberland ->define_extent.ga_extended |= 0x04; 2361d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 236218d6624eSStefan Haberland } else { 236318d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 236418d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 236545f186beSJan Höppner DASD_ECKD_CCW_WRITE_CKD, startdev, 0); 236618d6624eSStefan Haberland /* grant subsystem permission to format R0 */ 236718d6624eSStefan Haberland if (r0_perm) 236818d6624eSStefan Haberland ((struct DE_eckd_data *) data) 236918d6624eSStefan Haberland ->ga_extended |= 0x04; 237018d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 237118d6624eSStefan Haberland } 23721da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 23731da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 2374d42e1712SStefan Haberland fdata->start_unit, 0, rpt*nr_tracks, 2375d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, 23761da177e4SLinus Torvalds fdata->blksize); 23771da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 23781da177e4SLinus Torvalds break; 23791da177e4SLinus Torvalds case 0x01: /* Write record zero + format track. */ 238018d6624eSStefan Haberland if (use_prefix) { 2381d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2382d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 23831da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, 2384d42e1712SStefan Haberland base, startdev); 2385d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 238618d6624eSStefan Haberland } else { 238718d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 238818d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 238945f186beSJan Höppner DASD_ECKD_CCW_WRITE_RECORD_ZERO, startdev, 0); 239018d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 239118d6624eSStefan Haberland } 23921da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 23931da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 2394d42e1712SStefan Haberland fdata->start_unit, 0, rpt * nr_tracks + 1, 2395d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_RECORD_ZERO, base, 2396d42e1712SStefan Haberland base->block->bp_block); 23971da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 23981da177e4SLinus Torvalds break; 23991da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 240018d6624eSStefan Haberland if (use_prefix) { 2401d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2402d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 2403d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2404d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 240518d6624eSStefan Haberland } else { 240618d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 240718d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 240845f186beSJan Höppner DASD_ECKD_CCW_WRITE_CKD, startdev, 0); 240918d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 241018d6624eSStefan Haberland } 24111da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 24121da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 24131da177e4SLinus Torvalds fdata->start_unit, 0, 1, 2414d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, 8); 24151da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 24161da177e4SLinus Torvalds break; 24171da177e4SLinus Torvalds } 2418d42e1712SStefan Haberland 2419d42e1712SStefan Haberland for (j = 0; j < nr_tracks; j++) { 2420d42e1712SStefan Haberland /* calculate cylinder and head for the current track */ 2421d42e1712SStefan Haberland set_ch_t(&address, 2422d42e1712SStefan Haberland (fdata->start_unit + j) / 2423d42e1712SStefan Haberland base_priv->rdc_data.trk_per_cyl, 2424d42e1712SStefan Haberland (fdata->start_unit + j) % 2425d42e1712SStefan Haberland base_priv->rdc_data.trk_per_cyl); 2426f9a28f7bSJean-Baptiste Joret if (intensity & 0x01) { /* write record zero */ 24271da177e4SLinus Torvalds ect = (struct eckd_count *) data; 24281da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2429b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2430b44b0ab3SStefan Weinhuber ect->head = address.head; 24311da177e4SLinus Torvalds ect->record = 0; 24321da177e4SLinus Torvalds ect->kl = 0; 24331da177e4SLinus Torvalds ect->dl = 8; 24341da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 24351da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 24361da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 24371da177e4SLinus Torvalds ccw->count = 8; 24381da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 24391da177e4SLinus Torvalds ccw++; 24401da177e4SLinus Torvalds } 2441f9a28f7bSJean-Baptiste Joret if ((intensity & ~0x08) & 0x04) { /* erase track */ 24421da177e4SLinus Torvalds ect = (struct eckd_count *) data; 24431da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2444b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2445b44b0ab3SStefan Weinhuber ect->head = address.head; 24461da177e4SLinus Torvalds ect->record = 1; 24471da177e4SLinus Torvalds ect->kl = 0; 24481da177e4SLinus Torvalds ect->dl = 0; 24491da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 24501da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 24511da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 24521da177e4SLinus Torvalds ccw->count = 8; 24531da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 24541da177e4SLinus Torvalds } else { /* write remaining records */ 24551da177e4SLinus Torvalds for (i = 0; i < rpt; i++) { 24561da177e4SLinus Torvalds ect = (struct eckd_count *) data; 24571da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2458b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2459b44b0ab3SStefan Weinhuber ect->head = address.head; 24601da177e4SLinus Torvalds ect->record = i + 1; 24611da177e4SLinus Torvalds ect->kl = 0; 24621da177e4SLinus Torvalds ect->dl = fdata->blksize; 2463d42e1712SStefan Haberland /* 2464d42e1712SStefan Haberland * Check for special tracks 0-1 2465d42e1712SStefan Haberland * when formatting CDL 2466d42e1712SStefan Haberland */ 2467f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 246846d1c03cSJan Höppner address.cyl == 0 && address.head == 0) { 24691da177e4SLinus Torvalds if (i < 3) { 24701da177e4SLinus Torvalds ect->kl = 4; 24711da177e4SLinus Torvalds ect->dl = sizes_trk0[i] - 4; 24721da177e4SLinus Torvalds } 24731da177e4SLinus Torvalds } 2474f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 247546d1c03cSJan Höppner address.cyl == 0 && address.head == 1) { 24761da177e4SLinus Torvalds ect->kl = 44; 24771da177e4SLinus Torvalds ect->dl = LABEL_SIZE - 44; 24781da177e4SLinus Torvalds } 24791da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 2480d42e1712SStefan Haberland if (i != 0 || j == 0) 2481d42e1712SStefan Haberland ccw->cmd_code = 2482d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD; 2483d42e1712SStefan Haberland else 2484d42e1712SStefan Haberland ccw->cmd_code = 2485d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD_MT; 24861da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 24871da177e4SLinus Torvalds ccw->count = 8; 24881da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 24891da177e4SLinus Torvalds ccw++; 24901da177e4SLinus Torvalds } 24911da177e4SLinus Torvalds } 2492d42e1712SStefan Haberland } 2493d42e1712SStefan Haberland 2494d42e1712SStefan Haberland fcp->startdev = startdev; 2495d42e1712SStefan Haberland fcp->memdev = startdev; 249629b8dd9dSStefan Haberland fcp->basedev = base; 2497eb6e199bSStefan Weinhuber fcp->retries = 256; 2498d42e1712SStefan Haberland fcp->expires = startdev->default_expires * HZ; 24991aae0560SHeiko Carstens fcp->buildclk = get_tod_clock(); 25001da177e4SLinus Torvalds fcp->status = DASD_CQR_FILLED; 2501d42e1712SStefan Haberland 25021da177e4SLinus Torvalds return fcp; 25031da177e4SLinus Torvalds } 25041da177e4SLinus Torvalds 2505570d237cSJan Höppner /* 2506570d237cSJan Höppner * Wrapper function to build a CCW request depending on input data 2507570d237cSJan Höppner */ 2508570d237cSJan Höppner static struct dasd_ccw_req * 2509570d237cSJan Höppner dasd_eckd_format_build_ccw_req(struct dasd_device *base, 25108fd57520SJan Höppner struct format_data_t *fdata, int enable_pav, 25118fd57520SJan Höppner int tpm, struct eckd_count *fmt_buffer, int rpt) 2512d42e1712SStefan Haberland { 25138fd57520SJan Höppner struct dasd_ccw_req *ccw_req; 25148fd57520SJan Höppner 25158fd57520SJan Höppner if (!fmt_buffer) { 25168fd57520SJan Höppner ccw_req = dasd_eckd_build_format(base, fdata, enable_pav); 25178fd57520SJan Höppner } else { 25188fd57520SJan Höppner if (tpm) 25198fd57520SJan Höppner ccw_req = dasd_eckd_build_check_tcw(base, fdata, 25208fd57520SJan Höppner enable_pav, 25218fd57520SJan Höppner fmt_buffer, rpt); 25228fd57520SJan Höppner else 25238fd57520SJan Höppner ccw_req = dasd_eckd_build_check(base, fdata, enable_pav, 25248fd57520SJan Höppner fmt_buffer, rpt); 25258fd57520SJan Höppner } 25268fd57520SJan Höppner 25278fd57520SJan Höppner return ccw_req; 2528570d237cSJan Höppner } 2529570d237cSJan Höppner 2530570d237cSJan Höppner /* 2531570d237cSJan Höppner * Sanity checks on format_data 2532570d237cSJan Höppner */ 2533570d237cSJan Höppner static int dasd_eckd_format_sanity_checks(struct dasd_device *base, 2534570d237cSJan Höppner struct format_data_t *fdata) 2535570d237cSJan Höppner { 2536543691a4SSebastian Ott struct dasd_eckd_private *private = base->private; 2537d42e1712SStefan Haberland 2538d42e1712SStefan Haberland if (fdata->start_unit >= 2539d42e1712SStefan Haberland (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2540d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2541d42e1712SStefan Haberland "Start track number %u used in formatting is too big\n", 2542d42e1712SStefan Haberland fdata->start_unit); 2543d42e1712SStefan Haberland return -EINVAL; 2544d42e1712SStefan Haberland } 2545d42e1712SStefan Haberland if (fdata->stop_unit >= 2546d42e1712SStefan Haberland (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2547d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2548d42e1712SStefan Haberland "Stop track number %u used in formatting is too big\n", 2549d42e1712SStefan Haberland fdata->stop_unit); 2550d42e1712SStefan Haberland return -EINVAL; 2551d42e1712SStefan Haberland } 2552d42e1712SStefan Haberland if (fdata->start_unit > fdata->stop_unit) { 2553d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2554d42e1712SStefan Haberland "Start track %u used in formatting exceeds end track\n", 2555d42e1712SStefan Haberland fdata->start_unit); 2556d42e1712SStefan Haberland return -EINVAL; 2557d42e1712SStefan Haberland } 2558d42e1712SStefan Haberland if (dasd_check_blocksize(fdata->blksize) != 0) { 2559d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2560d42e1712SStefan Haberland "The DASD cannot be formatted with block size %u\n", 2561d42e1712SStefan Haberland fdata->blksize); 2562d42e1712SStefan Haberland return -EINVAL; 2563d42e1712SStefan Haberland } 2564570d237cSJan Höppner return 0; 2565570d237cSJan Höppner } 2566570d237cSJan Höppner 2567570d237cSJan Höppner /* 2568570d237cSJan Höppner * This function will process format_data originally coming from an IOCTL 2569570d237cSJan Höppner */ 2570570d237cSJan Höppner static int dasd_eckd_format_process_data(struct dasd_device *base, 2571570d237cSJan Höppner struct format_data_t *fdata, 25728fd57520SJan Höppner int enable_pav, int tpm, 25738fd57520SJan Höppner struct eckd_count *fmt_buffer, int rpt, 25748fd57520SJan Höppner struct irb *irb) 2575570d237cSJan Höppner { 2576543691a4SSebastian Ott struct dasd_eckd_private *private = base->private; 2577570d237cSJan Höppner struct dasd_ccw_req *cqr, *n; 2578570d237cSJan Höppner struct list_head format_queue; 2579570d237cSJan Höppner struct dasd_device *device; 25808fd57520SJan Höppner char *sense = NULL; 2581570d237cSJan Höppner int old_start, old_stop, format_step; 2582570d237cSJan Höppner int step, retry; 2583570d237cSJan Höppner int rc; 2584570d237cSJan Höppner 2585570d237cSJan Höppner rc = dasd_eckd_format_sanity_checks(base, fdata); 2586570d237cSJan Höppner if (rc) 2587570d237cSJan Höppner return rc; 2588d42e1712SStefan Haberland 2589d42e1712SStefan Haberland INIT_LIST_HEAD(&format_queue); 2590d42e1712SStefan Haberland 259146d1c03cSJan Höppner old_start = fdata->start_unit; 259229b8dd9dSStefan Haberland old_stop = fdata->stop_unit; 2593d42e1712SStefan Haberland 25948fd57520SJan Höppner if (!tpm && fmt_buffer != NULL) { 25958fd57520SJan Höppner /* Command Mode / Format Check */ 25968fd57520SJan Höppner format_step = 1; 25978fd57520SJan Höppner } else if (tpm && fmt_buffer != NULL) { 25988fd57520SJan Höppner /* Transport Mode / Format Check */ 25998fd57520SJan Höppner format_step = DASD_CQR_MAX_CCW / rpt; 26008fd57520SJan Höppner } else { 26018fd57520SJan Höppner /* Normal Formatting */ 26028fd57520SJan Höppner format_step = DASD_CQR_MAX_CCW / 26038fd57520SJan Höppner recs_per_track(&private->rdc_data, 0, fdata->blksize); 26048fd57520SJan Höppner } 26058fd57520SJan Höppner 260646d1c03cSJan Höppner do { 260746d1c03cSJan Höppner retry = 0; 2608d42e1712SStefan Haberland while (fdata->start_unit <= old_stop) { 2609d42e1712SStefan Haberland step = fdata->stop_unit - fdata->start_unit + 1; 261046d1c03cSJan Höppner if (step > format_step) { 261146d1c03cSJan Höppner fdata->stop_unit = 261246d1c03cSJan Höppner fdata->start_unit + format_step - 1; 261346d1c03cSJan Höppner } 2614d42e1712SStefan Haberland 2615570d237cSJan Höppner cqr = dasd_eckd_format_build_ccw_req(base, fdata, 26168fd57520SJan Höppner enable_pav, tpm, 26178fd57520SJan Höppner fmt_buffer, rpt); 2618d42e1712SStefan Haberland if (IS_ERR(cqr)) { 261946d1c03cSJan Höppner rc = PTR_ERR(cqr); 262046d1c03cSJan Höppner if (rc == -ENOMEM) { 262146d1c03cSJan Höppner if (list_empty(&format_queue)) 262246d1c03cSJan Höppner goto out; 2623d42e1712SStefan Haberland /* 262446d1c03cSJan Höppner * not enough memory available, start 262546d1c03cSJan Höppner * requests retry after first requests 262646d1c03cSJan Höppner * were finished 2627d42e1712SStefan Haberland */ 262846d1c03cSJan Höppner retry = 1; 262946d1c03cSJan Höppner break; 2630d42e1712SStefan Haberland } 263146d1c03cSJan Höppner goto out_err; 263246d1c03cSJan Höppner } 263346d1c03cSJan Höppner list_add_tail(&cqr->blocklist, &format_queue); 2634d42e1712SStefan Haberland 26358fd57520SJan Höppner if (fmt_buffer) { 26368fd57520SJan Höppner step = fdata->stop_unit - fdata->start_unit + 1; 26378fd57520SJan Höppner fmt_buffer += rpt * step; 26388fd57520SJan Höppner } 2639d42e1712SStefan Haberland fdata->start_unit = fdata->stop_unit + 1; 2640d42e1712SStefan Haberland fdata->stop_unit = old_stop; 2641d42e1712SStefan Haberland } 2642d42e1712SStefan Haberland 264346d1c03cSJan Höppner rc = dasd_sleep_on_queue(&format_queue); 2644d42e1712SStefan Haberland 264546d1c03cSJan Höppner out_err: 2646d42e1712SStefan Haberland list_for_each_entry_safe(cqr, n, &format_queue, blocklist) { 2647d42e1712SStefan Haberland device = cqr->startdev; 2648543691a4SSebastian Ott private = device->private; 26498fd57520SJan Höppner 26508fd57520SJan Höppner if (cqr->status == DASD_CQR_FAILED) { 26518fd57520SJan Höppner /* 26528fd57520SJan Höppner * Only get sense data if called by format 26538fd57520SJan Höppner * check 26548fd57520SJan Höppner */ 26558fd57520SJan Höppner if (fmt_buffer && irb) { 26568fd57520SJan Höppner sense = dasd_get_sense(&cqr->irb); 26578fd57520SJan Höppner memcpy(irb, &cqr->irb, sizeof(*irb)); 26588fd57520SJan Höppner } 2659d42e1712SStefan Haberland rc = -EIO; 26608fd57520SJan Höppner } 2661d42e1712SStefan Haberland list_del_init(&cqr->blocklist); 2662d42e1712SStefan Haberland dasd_sfree_request(cqr, device); 2663d42e1712SStefan Haberland private->count--; 2664d42e1712SStefan Haberland } 2665d42e1712SStefan Haberland 26668fd57520SJan Höppner if (rc && rc != -EIO) 266746d1c03cSJan Höppner goto out; 26688fd57520SJan Höppner if (rc == -EIO) { 26698fd57520SJan Höppner /* 26708fd57520SJan Höppner * In case fewer than the expected records are on the 26718fd57520SJan Höppner * track, we will most likely get a 'No Record Found' 26728fd57520SJan Höppner * error (in command mode) or a 'File Protected' error 26738fd57520SJan Höppner * (in transport mode). Those particular cases shouldn't 26748fd57520SJan Höppner * pass the -EIO to the IOCTL, therefore reset the rc 26758fd57520SJan Höppner * and continue. 26768fd57520SJan Höppner */ 26778fd57520SJan Höppner if (sense && 26788fd57520SJan Höppner (sense[1] & SNS1_NO_REC_FOUND || 26798fd57520SJan Höppner sense[1] & SNS1_FILE_PROTECTED)) 26808fd57520SJan Höppner retry = 1; 26818fd57520SJan Höppner else 26828fd57520SJan Höppner goto out; 26838fd57520SJan Höppner } 268429b8dd9dSStefan Haberland 268546d1c03cSJan Höppner } while (retry); 268646d1c03cSJan Höppner 268746d1c03cSJan Höppner out: 268846d1c03cSJan Höppner fdata->start_unit = old_start; 268946d1c03cSJan Höppner fdata->stop_unit = old_stop; 2690d42e1712SStefan Haberland 2691d42e1712SStefan Haberland return rc; 2692d42e1712SStefan Haberland } 2693d42e1712SStefan Haberland 2694570d237cSJan Höppner static int dasd_eckd_format_device(struct dasd_device *base, 2695570d237cSJan Höppner struct format_data_t *fdata, int enable_pav) 2696570d237cSJan Höppner { 26978fd57520SJan Höppner return dasd_eckd_format_process_data(base, fdata, enable_pav, 0, NULL, 26988fd57520SJan Höppner 0, NULL); 26998fd57520SJan Höppner } 27008fd57520SJan Höppner 27018fd57520SJan Höppner /* 27028fd57520SJan Höppner * Helper function to count consecutive records of a single track. 27038fd57520SJan Höppner */ 27048fd57520SJan Höppner static int dasd_eckd_count_records(struct eckd_count *fmt_buffer, int start, 27058fd57520SJan Höppner int max) 27068fd57520SJan Höppner { 27078fd57520SJan Höppner int head; 27088fd57520SJan Höppner int i; 27098fd57520SJan Höppner 27108fd57520SJan Höppner head = fmt_buffer[start].head; 27118fd57520SJan Höppner 27128fd57520SJan Höppner /* 27138fd57520SJan Höppner * There are 3 conditions where we stop counting: 27148fd57520SJan Höppner * - if data reoccurs (same head and record may reoccur), which may 27158fd57520SJan Höppner * happen due to the way DASD_ECKD_CCW_READ_COUNT works 27168fd57520SJan Höppner * - when the head changes, because we're iterating over several tracks 27178fd57520SJan Höppner * then (DASD_ECKD_CCW_READ_COUNT_MT) 27188fd57520SJan Höppner * - when we've reached the end of sensible data in the buffer (the 27198fd57520SJan Höppner * record will be 0 then) 27208fd57520SJan Höppner */ 27218fd57520SJan Höppner for (i = start; i < max; i++) { 27228fd57520SJan Höppner if (i > start) { 27238fd57520SJan Höppner if ((fmt_buffer[i].head == head && 27248fd57520SJan Höppner fmt_buffer[i].record == 1) || 27258fd57520SJan Höppner fmt_buffer[i].head != head || 27268fd57520SJan Höppner fmt_buffer[i].record == 0) 27278fd57520SJan Höppner break; 27288fd57520SJan Höppner } 27298fd57520SJan Höppner } 27308fd57520SJan Höppner 27318fd57520SJan Höppner return i - start; 27328fd57520SJan Höppner } 27338fd57520SJan Höppner 27348fd57520SJan Höppner /* 27358fd57520SJan Höppner * Evaluate a given range of tracks. Data like number of records, blocksize, 27368fd57520SJan Höppner * record ids, and key length are compared with expected data. 27378fd57520SJan Höppner * 27388fd57520SJan Höppner * If a mismatch occurs, the corresponding error bit is set, as well as 27398fd57520SJan Höppner * additional information, depending on the error. 27408fd57520SJan Höppner */ 27418fd57520SJan Höppner static void dasd_eckd_format_evaluate_tracks(struct eckd_count *fmt_buffer, 27428fd57520SJan Höppner struct format_check_t *cdata, 27438fd57520SJan Höppner int rpt_max, int rpt_exp, 27448fd57520SJan Höppner int trk_per_cyl, int tpm) 27458fd57520SJan Höppner { 27468fd57520SJan Höppner struct ch_t geo; 27478fd57520SJan Höppner int max_entries; 27488fd57520SJan Höppner int count = 0; 27498fd57520SJan Höppner int trkcount; 27508fd57520SJan Höppner int blksize; 27518fd57520SJan Höppner int pos = 0; 27528fd57520SJan Höppner int i, j; 27538fd57520SJan Höppner int kl; 27548fd57520SJan Höppner 27558fd57520SJan Höppner trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; 27568fd57520SJan Höppner max_entries = trkcount * rpt_max; 27578fd57520SJan Höppner 27588fd57520SJan Höppner for (i = cdata->expect.start_unit; i <= cdata->expect.stop_unit; i++) { 27598fd57520SJan Höppner /* Calculate the correct next starting position in the buffer */ 27608fd57520SJan Höppner if (tpm) { 27618fd57520SJan Höppner while (fmt_buffer[pos].record == 0 && 27628fd57520SJan Höppner fmt_buffer[pos].dl == 0) { 27638fd57520SJan Höppner if (pos++ > max_entries) 27648fd57520SJan Höppner break; 27658fd57520SJan Höppner } 27668fd57520SJan Höppner } else { 27678fd57520SJan Höppner if (i != cdata->expect.start_unit) 27688fd57520SJan Höppner pos += rpt_max - count; 27698fd57520SJan Höppner } 27708fd57520SJan Höppner 27718fd57520SJan Höppner /* Calculate the expected geo values for the current track */ 27728fd57520SJan Höppner set_ch_t(&geo, i / trk_per_cyl, i % trk_per_cyl); 27738fd57520SJan Höppner 27748fd57520SJan Höppner /* Count and check number of records */ 27758fd57520SJan Höppner count = dasd_eckd_count_records(fmt_buffer, pos, pos + rpt_max); 27768fd57520SJan Höppner 27778fd57520SJan Höppner if (count < rpt_exp) { 27788fd57520SJan Höppner cdata->result = DASD_FMT_ERR_TOO_FEW_RECORDS; 27798fd57520SJan Höppner break; 27808fd57520SJan Höppner } 27818fd57520SJan Höppner if (count > rpt_exp) { 27828fd57520SJan Höppner cdata->result = DASD_FMT_ERR_TOO_MANY_RECORDS; 27838fd57520SJan Höppner break; 27848fd57520SJan Höppner } 27858fd57520SJan Höppner 27868fd57520SJan Höppner for (j = 0; j < count; j++, pos++) { 27878fd57520SJan Höppner blksize = cdata->expect.blksize; 27888fd57520SJan Höppner kl = 0; 27898fd57520SJan Höppner 27908fd57520SJan Höppner /* 27918fd57520SJan Höppner * Set special values when checking CDL formatted 27928fd57520SJan Höppner * devices. 27938fd57520SJan Höppner */ 27948fd57520SJan Höppner if ((cdata->expect.intensity & 0x08) && 27958fd57520SJan Höppner geo.cyl == 0 && geo.head == 0) { 27968fd57520SJan Höppner if (j < 3) { 27978fd57520SJan Höppner blksize = sizes_trk0[j] - 4; 27988fd57520SJan Höppner kl = 4; 27998fd57520SJan Höppner } 28008fd57520SJan Höppner } 28018fd57520SJan Höppner if ((cdata->expect.intensity & 0x08) && 28028fd57520SJan Höppner geo.cyl == 0 && geo.head == 1) { 28038fd57520SJan Höppner blksize = LABEL_SIZE - 44; 28048fd57520SJan Höppner kl = 44; 28058fd57520SJan Höppner } 28068fd57520SJan Höppner 28078fd57520SJan Höppner /* Check blocksize */ 28088fd57520SJan Höppner if (fmt_buffer[pos].dl != blksize) { 28098fd57520SJan Höppner cdata->result = DASD_FMT_ERR_BLKSIZE; 28108fd57520SJan Höppner goto out; 28118fd57520SJan Höppner } 28128fd57520SJan Höppner /* Check if key length is 0 */ 28138fd57520SJan Höppner if (fmt_buffer[pos].kl != kl) { 28148fd57520SJan Höppner cdata->result = DASD_FMT_ERR_KEY_LENGTH; 28158fd57520SJan Höppner goto out; 28168fd57520SJan Höppner } 28178fd57520SJan Höppner /* Check if record_id is correct */ 28188fd57520SJan Höppner if (fmt_buffer[pos].cyl != geo.cyl || 28198fd57520SJan Höppner fmt_buffer[pos].head != geo.head || 28208fd57520SJan Höppner fmt_buffer[pos].record != (j + 1)) { 28218fd57520SJan Höppner cdata->result = DASD_FMT_ERR_RECORD_ID; 28228fd57520SJan Höppner goto out; 28238fd57520SJan Höppner } 28248fd57520SJan Höppner } 28258fd57520SJan Höppner } 28268fd57520SJan Höppner 28278fd57520SJan Höppner out: 28288fd57520SJan Höppner /* 28298fd57520SJan Höppner * In case of no errors, we need to decrease by one 28308fd57520SJan Höppner * to get the correct positions. 28318fd57520SJan Höppner */ 28328fd57520SJan Höppner if (!cdata->result) { 28338fd57520SJan Höppner i--; 28348fd57520SJan Höppner pos--; 28358fd57520SJan Höppner } 28368fd57520SJan Höppner 28378fd57520SJan Höppner cdata->unit = i; 28388fd57520SJan Höppner cdata->num_records = count; 28398fd57520SJan Höppner cdata->rec = fmt_buffer[pos].record; 28408fd57520SJan Höppner cdata->blksize = fmt_buffer[pos].dl; 28418fd57520SJan Höppner cdata->key_length = fmt_buffer[pos].kl; 28428fd57520SJan Höppner } 28438fd57520SJan Höppner 28448fd57520SJan Höppner /* 28458fd57520SJan Höppner * Check the format of a range of tracks of a DASD. 28468fd57520SJan Höppner */ 28478fd57520SJan Höppner static int dasd_eckd_check_device_format(struct dasd_device *base, 28488fd57520SJan Höppner struct format_check_t *cdata, 28498fd57520SJan Höppner int enable_pav) 28508fd57520SJan Höppner { 28518fd57520SJan Höppner struct dasd_eckd_private *private = base->private; 28528fd57520SJan Höppner struct eckd_count *fmt_buffer; 28538fd57520SJan Höppner struct irb irb; 28548fd57520SJan Höppner int rpt_max, rpt_exp; 28558fd57520SJan Höppner int fmt_buffer_size; 28568fd57520SJan Höppner int trk_per_cyl; 28578fd57520SJan Höppner int trkcount; 28588fd57520SJan Höppner int tpm = 0; 28598fd57520SJan Höppner int rc; 28608fd57520SJan Höppner 28618fd57520SJan Höppner trk_per_cyl = private->rdc_data.trk_per_cyl; 28628fd57520SJan Höppner 28638fd57520SJan Höppner /* Get maximum and expected amount of records per track */ 28648fd57520SJan Höppner rpt_max = recs_per_track(&private->rdc_data, 0, 512) + 1; 28658fd57520SJan Höppner rpt_exp = recs_per_track(&private->rdc_data, 0, cdata->expect.blksize); 28668fd57520SJan Höppner 28678fd57520SJan Höppner trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; 28688fd57520SJan Höppner fmt_buffer_size = trkcount * rpt_max * sizeof(struct eckd_count); 28698fd57520SJan Höppner 28708fd57520SJan Höppner fmt_buffer = kzalloc(fmt_buffer_size, GFP_KERNEL | GFP_DMA); 28718fd57520SJan Höppner if (!fmt_buffer) 28728fd57520SJan Höppner return -ENOMEM; 28738fd57520SJan Höppner 28748fd57520SJan Höppner /* 28758fd57520SJan Höppner * A certain FICON feature subset is needed to operate in transport 28768fd57520SJan Höppner * mode. Additionally, the support for transport mode is implicitly 28778fd57520SJan Höppner * checked by comparing the buffer size with fcx_max_data. As long as 28788fd57520SJan Höppner * the buffer size is smaller we can operate in transport mode and 28798fd57520SJan Höppner * process multiple tracks. If not, only one track at once is being 28808fd57520SJan Höppner * processed using command mode. 28818fd57520SJan Höppner */ 28828fd57520SJan Höppner if ((private->features.feature[40] & 0x04) && 28838fd57520SJan Höppner fmt_buffer_size <= private->fcx_max_data) 28848fd57520SJan Höppner tpm = 1; 28858fd57520SJan Höppner 28868fd57520SJan Höppner rc = dasd_eckd_format_process_data(base, &cdata->expect, enable_pav, 28878fd57520SJan Höppner tpm, fmt_buffer, rpt_max, &irb); 28888fd57520SJan Höppner if (rc && rc != -EIO) 28898fd57520SJan Höppner goto out; 28908fd57520SJan Höppner if (rc == -EIO) { 28918fd57520SJan Höppner /* 28928fd57520SJan Höppner * If our first attempt with transport mode enabled comes back 28938fd57520SJan Höppner * with an incorrect length error, we're going to retry the 28948fd57520SJan Höppner * check with command mode. 28958fd57520SJan Höppner */ 28968fd57520SJan Höppner if (tpm && scsw_cstat(&irb.scsw) == 0x40) { 28978fd57520SJan Höppner tpm = 0; 28988fd57520SJan Höppner rc = dasd_eckd_format_process_data(base, &cdata->expect, 28998fd57520SJan Höppner enable_pav, tpm, 29008fd57520SJan Höppner fmt_buffer, rpt_max, 29018fd57520SJan Höppner &irb); 29028fd57520SJan Höppner if (rc) 29038fd57520SJan Höppner goto out; 29048fd57520SJan Höppner } else { 29058fd57520SJan Höppner goto out; 29068fd57520SJan Höppner } 29078fd57520SJan Höppner } 29088fd57520SJan Höppner 29098fd57520SJan Höppner dasd_eckd_format_evaluate_tracks(fmt_buffer, cdata, rpt_max, rpt_exp, 29108fd57520SJan Höppner trk_per_cyl, tpm); 29118fd57520SJan Höppner 29128fd57520SJan Höppner out: 29138fd57520SJan Höppner kfree(fmt_buffer); 29148fd57520SJan Höppner 29158fd57520SJan Höppner return rc; 2916570d237cSJan Höppner } 2917570d237cSJan Höppner 29188e09f215SStefan Weinhuber static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 29191da177e4SLinus Torvalds { 2920a2ace466SHannes Reinecke if (cqr->retries < 0) { 2921a2ace466SHannes Reinecke cqr->status = DASD_CQR_FAILED; 2922a2ace466SHannes Reinecke return; 2923a2ace466SHannes Reinecke } 29248e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 29258e09f215SStefan Weinhuber if (cqr->block && (cqr->startdev != cqr->block->base)) { 29268e09f215SStefan Weinhuber dasd_eckd_reset_ccw_to_base_io(cqr); 29278e09f215SStefan Weinhuber cqr->startdev = cqr->block->base; 2928c9346151SStefan Haberland cqr->lpm = dasd_path_get_opm(cqr->block->base); 29291da177e4SLinus Torvalds } 29308e09f215SStefan Weinhuber }; 29311da177e4SLinus Torvalds 29321da177e4SLinus Torvalds static dasd_erp_fn_t 29331da177e4SLinus Torvalds dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 29341da177e4SLinus Torvalds { 29358e09f215SStefan Weinhuber struct dasd_device *device = (struct dasd_device *) cqr->startdev; 29361da177e4SLinus Torvalds struct ccw_device *cdev = device->cdev; 29371da177e4SLinus Torvalds 29381da177e4SLinus Torvalds switch (cdev->id.cu_type) { 29391da177e4SLinus Torvalds case 0x3990: 29401da177e4SLinus Torvalds case 0x2105: 29411da177e4SLinus Torvalds case 0x2107: 29421da177e4SLinus Torvalds case 0x1750: 29431da177e4SLinus Torvalds return dasd_3990_erp_action; 29441da177e4SLinus Torvalds case 0x9343: 29451da177e4SLinus Torvalds case 0x3880: 29461da177e4SLinus Torvalds default: 29471da177e4SLinus Torvalds return dasd_default_erp_action; 29481da177e4SLinus Torvalds } 29491da177e4SLinus Torvalds } 29501da177e4SLinus Torvalds 29511da177e4SLinus Torvalds static dasd_erp_fn_t 29521da177e4SLinus Torvalds dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 29531da177e4SLinus Torvalds { 29541da177e4SLinus Torvalds return dasd_default_erp_postaction; 29551da177e4SLinus Torvalds } 29561da177e4SLinus Torvalds 29575a27e60dSStefan Weinhuber static void dasd_eckd_check_for_device_change(struct dasd_device *device, 29585a27e60dSStefan Weinhuber struct dasd_ccw_req *cqr, 29598e09f215SStefan Weinhuber struct irb *irb) 29608e09f215SStefan Weinhuber { 29618e09f215SStefan Weinhuber char mask; 2962f3eb5384SStefan Weinhuber char *sense = NULL; 2963543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 29648e09f215SStefan Weinhuber 29658e09f215SStefan Weinhuber /* first of all check for state change pending interrupt */ 29668e09f215SStefan Weinhuber mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 2967f3eb5384SStefan Weinhuber if ((scsw_dstat(&irb->scsw) & mask) == mask) { 2968c8d1c0ffSStefan Haberland /* 2969c8d1c0ffSStefan Haberland * for alias only, not in offline processing 2970c8d1c0ffSStefan Haberland * and only if not suspended 2971c8d1c0ffSStefan Haberland */ 2972501183f2SStefan Haberland if (!device->block && private->lcu && 297325e2cf1cSStefan Haberland device->state == DASD_STATE_ONLINE && 2974c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_OFFLINE, &device->flags) && 2975c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 2976501183f2SStefan Haberland /* schedule worker to reload device */ 2977501183f2SStefan Haberland dasd_reload_device(device); 2978501183f2SStefan Haberland } 29798e09f215SStefan Weinhuber dasd_generic_handle_state_change(device); 29808e09f215SStefan Weinhuber return; 29818e09f215SStefan Weinhuber } 29828e09f215SStefan Weinhuber 2983a5a0061fSStefan Weinhuber sense = dasd_get_sense(irb); 29845a27e60dSStefan Weinhuber if (!sense) 29855a27e60dSStefan Weinhuber return; 29865a27e60dSStefan Weinhuber 29875a27e60dSStefan Weinhuber /* summary unit check */ 2988c7a29e56SStefan Weinhuber if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) && 2989a5a0061fSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { 299059a9ed5fSStefan Haberland if (test_and_set_bit(DASD_FLAG_SUC, &device->flags)) { 299159a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 299259a9ed5fSStefan Haberland "eckd suc: device already notified"); 299359a9ed5fSStefan Haberland return; 299459a9ed5fSStefan Haberland } 299559a9ed5fSStefan Haberland sense = dasd_get_sense(irb); 299659a9ed5fSStefan Haberland if (!sense) { 299759a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 299859a9ed5fSStefan Haberland "eckd suc: no reason code available"); 299959a9ed5fSStefan Haberland clear_bit(DASD_FLAG_SUC, &device->flags); 300059a9ed5fSStefan Haberland return; 300159a9ed5fSStefan Haberland 300259a9ed5fSStefan Haberland } 300359a9ed5fSStefan Haberland private->suc_reason = sense[8]; 300459a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_NOTICE, device, "%s %x", 300559a9ed5fSStefan Haberland "eckd handle summary unit check: reason", 300659a9ed5fSStefan Haberland private->suc_reason); 300759a9ed5fSStefan Haberland dasd_get_device(device); 300859a9ed5fSStefan Haberland if (!schedule_work(&device->suc_work)) 300959a9ed5fSStefan Haberland dasd_put_device(device); 301059a9ed5fSStefan Haberland 30118e09f215SStefan Weinhuber return; 30128e09f215SStefan Weinhuber } 30138e09f215SStefan Weinhuber 3014f60c768cSStefan Haberland /* service information message SIM */ 30155a27e60dSStefan Weinhuber if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && 3016f3eb5384SStefan Weinhuber ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 3017f3eb5384SStefan Weinhuber dasd_3990_erp_handle_sim(device, sense); 3018f60c768cSStefan Haberland return; 3019f60c768cSStefan Haberland } 3020f60c768cSStefan Haberland 30215a27e60dSStefan Weinhuber /* loss of device reservation is handled via base devices only 30225a27e60dSStefan Weinhuber * as alias devices may be used with several bases 30235a27e60dSStefan Weinhuber */ 3024c7a29e56SStefan Weinhuber if (device->block && (sense[27] & DASD_SENSE_BIT_0) && 3025c7a29e56SStefan Weinhuber (sense[7] == 0x3F) && 30265a27e60dSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && 30275a27e60dSStefan Weinhuber test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { 30285a27e60dSStefan Weinhuber if (device->features & DASD_FEATURE_FAILONSLCK) 30295a27e60dSStefan Weinhuber set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); 30305a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 30315a27e60dSStefan Weinhuber dev_err(&device->cdev->dev, 30325a27e60dSStefan Weinhuber "The device reservation was lost\n"); 3033ada3df91SStefan Haberland } 30345a27e60dSStefan Weinhuber } 3035f3eb5384SStefan Weinhuber 3036f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( 3037f3eb5384SStefan Weinhuber struct dasd_device *startdev, 30388e09f215SStefan Weinhuber struct dasd_block *block, 3039f3eb5384SStefan Weinhuber struct request *req, 3040f3eb5384SStefan Weinhuber sector_t first_rec, 3041f3eb5384SStefan Weinhuber sector_t last_rec, 3042f3eb5384SStefan Weinhuber sector_t first_trk, 3043f3eb5384SStefan Weinhuber sector_t last_trk, 3044f3eb5384SStefan Weinhuber unsigned int first_offs, 3045f3eb5384SStefan Weinhuber unsigned int last_offs, 3046f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 3047f3eb5384SStefan Weinhuber unsigned int blksize) 30481da177e4SLinus Torvalds { 30491da177e4SLinus Torvalds struct dasd_eckd_private *private; 30501da177e4SLinus Torvalds unsigned long *idaws; 30511da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 30521da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 30531da177e4SLinus Torvalds struct ccw1 *ccw; 30545705f702SNeilBrown struct req_iterator iter; 30557988613bSKent Overstreet struct bio_vec bv; 30561da177e4SLinus Torvalds char *dst; 3057f3eb5384SStefan Weinhuber unsigned int off; 30581da177e4SLinus Torvalds int count, cidaw, cplength, datasize; 3059f3eb5384SStefan Weinhuber sector_t recid; 30601da177e4SLinus Torvalds unsigned char cmd, rcmd; 30618e09f215SStefan Weinhuber int use_prefix; 30628e09f215SStefan Weinhuber struct dasd_device *basedev; 30631da177e4SLinus Torvalds 30648e09f215SStefan Weinhuber basedev = block->base; 3065543691a4SSebastian Ott private = basedev->private; 30661da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 30671da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_READ_MT; 30681da177e4SLinus Torvalds else if (rq_data_dir(req) == WRITE) 30691da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_WRITE_MT; 30701da177e4SLinus Torvalds else 30711da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 3072f3eb5384SStefan Weinhuber 30731da177e4SLinus Torvalds /* Check struct bio and count the number of blocks for the request. */ 30741da177e4SLinus Torvalds count = 0; 30751da177e4SLinus Torvalds cidaw = 0; 30765705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 30777988613bSKent Overstreet if (bv.bv_len & (blksize - 1)) 30781da177e4SLinus Torvalds /* Eckd can only do full blocks. */ 30791da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 30807988613bSKent Overstreet count += bv.bv_len >> (block->s2b_shift + 9); 30817988613bSKent Overstreet if (idal_is_needed (page_address(bv.bv_page), bv.bv_len)) 30827988613bSKent Overstreet cidaw += bv.bv_len >> (block->s2b_shift + 9); 30831da177e4SLinus Torvalds } 30841da177e4SLinus Torvalds /* Paranoia. */ 30851da177e4SLinus Torvalds if (count != last_rec - first_rec + 1) 30861da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 30878e09f215SStefan Weinhuber 30888e09f215SStefan Weinhuber /* use the prefix command if available */ 30898e09f215SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 30908e09f215SStefan Weinhuber if (use_prefix) { 30918e09f215SStefan Weinhuber /* 1x prefix + number of blocks */ 30928e09f215SStefan Weinhuber cplength = 2 + count; 30938e09f215SStefan Weinhuber /* 1x prefix + cidaws*sizeof(long) */ 30948e09f215SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 30958e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 30968e09f215SStefan Weinhuber cidaw * sizeof(unsigned long); 30978e09f215SStefan Weinhuber } else { 30981da177e4SLinus Torvalds /* 1x define extent + 1x locate record + number of blocks */ 30991da177e4SLinus Torvalds cplength = 2 + count; 31001da177e4SLinus Torvalds /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 31018e09f215SStefan Weinhuber datasize = sizeof(struct DE_eckd_data) + 31028e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 31031da177e4SLinus Torvalds cidaw * sizeof(unsigned long); 31048e09f215SStefan Weinhuber } 31051da177e4SLinus Torvalds /* Find out the number of additional locate record ccws for cdl. */ 31061da177e4SLinus Torvalds if (private->uses_cdl && first_rec < 2*blk_per_trk) { 31071da177e4SLinus Torvalds if (last_rec >= 2*blk_per_trk) 31081da177e4SLinus Torvalds count = 2*blk_per_trk - first_rec; 31091da177e4SLinus Torvalds cplength += count; 31101da177e4SLinus Torvalds datasize += count*sizeof(struct LO_eckd_data); 31111da177e4SLinus Torvalds } 31121da177e4SLinus Torvalds /* Allocate the ccw request. */ 311368b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 3114c5205f2fSSebastian Ott startdev, blk_mq_rq_to_pdu(req)); 31151da177e4SLinus Torvalds if (IS_ERR(cqr)) 31161da177e4SLinus Torvalds return cqr; 31171da177e4SLinus Torvalds ccw = cqr->cpaddr; 31188e09f215SStefan Weinhuber /* First ccw is define extent or prefix. */ 31198e09f215SStefan Weinhuber if (use_prefix) { 31208e09f215SStefan Weinhuber if (prefix(ccw++, cqr->data, first_trk, 31218e09f215SStefan Weinhuber last_trk, cmd, basedev, startdev) == -EAGAIN) { 31228e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 31238e09f215SStefan Weinhuber * Try again later. 31248e09f215SStefan Weinhuber */ 31258e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 3126d54853efSMartin Schwidefsky return ERR_PTR(-EAGAIN); 3127d54853efSMartin Schwidefsky } 31288e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 31298e09f215SStefan Weinhuber sizeof(struct PFX_eckd_data)); 31308e09f215SStefan Weinhuber } else { 31318e09f215SStefan Weinhuber if (define_extent(ccw++, cqr->data, first_trk, 313245f186beSJan Höppner last_trk, cmd, basedev, 0) == -EAGAIN) { 31338e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 31348e09f215SStefan Weinhuber * Try again later. 31358e09f215SStefan Weinhuber */ 31368e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 31378e09f215SStefan Weinhuber return ERR_PTR(-EAGAIN); 31388e09f215SStefan Weinhuber } 31398e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 31408e09f215SStefan Weinhuber sizeof(struct DE_eckd_data)); 31418e09f215SStefan Weinhuber } 31421da177e4SLinus Torvalds /* Build locate_record+read/write/ccws. */ 31431da177e4SLinus Torvalds LO_data = (struct LO_eckd_data *) (idaws + cidaw); 31441da177e4SLinus Torvalds recid = first_rec; 31451da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 31461da177e4SLinus Torvalds /* Only standard blocks so there is just one locate record. */ 31471da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 31481da177e4SLinus Torvalds locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 31498e09f215SStefan Weinhuber last_rec - recid + 1, cmd, basedev, blksize); 31501da177e4SLinus Torvalds } 31515705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 31527988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 31531da177e4SLinus Torvalds if (dasd_page_cache) { 31541da177e4SLinus Torvalds char *copy = kmem_cache_alloc(dasd_page_cache, 3155441e143eSChristoph Lameter GFP_DMA | __GFP_NOWARN); 31561da177e4SLinus Torvalds if (copy && rq_data_dir(req) == WRITE) 31577988613bSKent Overstreet memcpy(copy + bv.bv_offset, dst, bv.bv_len); 31581da177e4SLinus Torvalds if (copy) 31597988613bSKent Overstreet dst = copy + bv.bv_offset; 31601da177e4SLinus Torvalds } 31617988613bSKent Overstreet for (off = 0; off < bv.bv_len; off += blksize) { 31621da177e4SLinus Torvalds sector_t trkid = recid; 31631da177e4SLinus Torvalds unsigned int recoffs = sector_div(trkid, blk_per_trk); 31641da177e4SLinus Torvalds rcmd = cmd; 31651da177e4SLinus Torvalds count = blksize; 31661da177e4SLinus Torvalds /* Locate record for cdl special block ? */ 31671da177e4SLinus Torvalds if (private->uses_cdl && recid < 2*blk_per_trk) { 31681da177e4SLinus Torvalds if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 31691da177e4SLinus Torvalds rcmd |= 0x8; 31701da177e4SLinus Torvalds count = dasd_eckd_cdl_reclen(recid); 3171ec5883abSHorst Hummel if (count < blksize && 3172ec5883abSHorst Hummel rq_data_dir(req) == READ) 31731da177e4SLinus Torvalds memset(dst + count, 0xe5, 31741da177e4SLinus Torvalds blksize - count); 31751da177e4SLinus Torvalds } 31761da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 31771da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 31781da177e4SLinus Torvalds trkid, recoffs + 1, 31798e09f215SStefan Weinhuber 1, rcmd, basedev, count); 31801da177e4SLinus Torvalds } 31811da177e4SLinus Torvalds /* Locate record for standard blocks ? */ 31821da177e4SLinus Torvalds if (private->uses_cdl && recid == 2*blk_per_trk) { 31831da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 31841da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 31851da177e4SLinus Torvalds trkid, recoffs + 1, 31861da177e4SLinus Torvalds last_rec - recid + 1, 31878e09f215SStefan Weinhuber cmd, basedev, count); 31881da177e4SLinus Torvalds } 31891da177e4SLinus Torvalds /* Read/write ccw. */ 31901da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 31911da177e4SLinus Torvalds ccw->cmd_code = rcmd; 31921da177e4SLinus Torvalds ccw->count = count; 31931da177e4SLinus Torvalds if (idal_is_needed(dst, blksize)) { 31941da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) idaws; 31951da177e4SLinus Torvalds ccw->flags = CCW_FLAG_IDA; 31961da177e4SLinus Torvalds idaws = idal_create_words(idaws, dst, blksize); 31971da177e4SLinus Torvalds } else { 31981da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) dst; 31991da177e4SLinus Torvalds ccw->flags = 0; 32001da177e4SLinus Torvalds } 32011da177e4SLinus Torvalds ccw++; 32021da177e4SLinus Torvalds dst += blksize; 32031da177e4SLinus Torvalds recid++; 32041da177e4SLinus Torvalds } 32051da177e4SLinus Torvalds } 320613de227bSHolger Smolinski if (blk_noretry_request(req) || 320713de227bSHolger Smolinski block->base->features & DASD_FEATURE_FAILFAST) 32081c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 32098e09f215SStefan Weinhuber cqr->startdev = startdev; 32108e09f215SStefan Weinhuber cqr->memdev = startdev; 32118e09f215SStefan Weinhuber cqr->block = block; 32127c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 3213c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 32141f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 32151aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 32161da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 32171da177e4SLinus Torvalds return cqr; 32181da177e4SLinus Torvalds } 32191da177e4SLinus Torvalds 3220f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 3221f3eb5384SStefan Weinhuber struct dasd_device *startdev, 3222f3eb5384SStefan Weinhuber struct dasd_block *block, 3223f3eb5384SStefan Weinhuber struct request *req, 3224f3eb5384SStefan Weinhuber sector_t first_rec, 3225f3eb5384SStefan Weinhuber sector_t last_rec, 3226f3eb5384SStefan Weinhuber sector_t first_trk, 3227f3eb5384SStefan Weinhuber sector_t last_trk, 3228f3eb5384SStefan Weinhuber unsigned int first_offs, 3229f3eb5384SStefan Weinhuber unsigned int last_offs, 3230f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 3231f3eb5384SStefan Weinhuber unsigned int blksize) 3232f3eb5384SStefan Weinhuber { 3233f3eb5384SStefan Weinhuber unsigned long *idaws; 3234f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 3235f3eb5384SStefan Weinhuber struct ccw1 *ccw; 3236f3eb5384SStefan Weinhuber struct req_iterator iter; 32377988613bSKent Overstreet struct bio_vec bv; 3238f3eb5384SStefan Weinhuber char *dst, *idaw_dst; 3239f3eb5384SStefan Weinhuber unsigned int cidaw, cplength, datasize; 3240f3eb5384SStefan Weinhuber unsigned int tlf; 3241f3eb5384SStefan Weinhuber sector_t recid; 3242f3eb5384SStefan Weinhuber unsigned char cmd; 3243f3eb5384SStefan Weinhuber struct dasd_device *basedev; 3244f3eb5384SStefan Weinhuber unsigned int trkcount, count, count_to_trk_end; 3245f3eb5384SStefan Weinhuber unsigned int idaw_len, seg_len, part_len, len_to_track_end; 3246f3eb5384SStefan Weinhuber unsigned char new_track, end_idaw; 3247f3eb5384SStefan Weinhuber sector_t trkid; 3248f3eb5384SStefan Weinhuber unsigned int recoffs; 3249f3eb5384SStefan Weinhuber 3250f3eb5384SStefan Weinhuber basedev = block->base; 3251f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) 3252f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 3253f3eb5384SStefan Weinhuber else if (rq_data_dir(req) == WRITE) 3254f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 3255f3eb5384SStefan Weinhuber else 3256f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 3257f3eb5384SStefan Weinhuber 3258f3eb5384SStefan Weinhuber /* Track based I/O needs IDAWs for each page, and not just for 3259f3eb5384SStefan Weinhuber * 64 bit addresses. We need additional idals for pages 3260f3eb5384SStefan Weinhuber * that get filled from two tracks, so we use the number 3261f3eb5384SStefan Weinhuber * of records as upper limit. 3262f3eb5384SStefan Weinhuber */ 3263f3eb5384SStefan Weinhuber cidaw = last_rec - first_rec + 1; 3264f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 3265f3eb5384SStefan Weinhuber 3266f3eb5384SStefan Weinhuber /* 1x prefix + one read/write ccw per track */ 3267f3eb5384SStefan Weinhuber cplength = 1 + trkcount; 3268f3eb5384SStefan Weinhuber 32697bf76f01SJan Höppner datasize = sizeof(struct PFX_eckd_data) + cidaw * sizeof(unsigned long); 3270f3eb5384SStefan Weinhuber 3271f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 327268b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 3273c5205f2fSSebastian Ott startdev, blk_mq_rq_to_pdu(req)); 3274f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 3275f3eb5384SStefan Weinhuber return cqr; 3276f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 3277f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 3278f3eb5384SStefan Weinhuber if (first_trk == last_trk) 3279f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 3280f3eb5384SStefan Weinhuber else 3281f3eb5384SStefan Weinhuber tlf = last_offs + 1; 3282f3eb5384SStefan Weinhuber tlf *= blksize; 3283f3eb5384SStefan Weinhuber 3284f3eb5384SStefan Weinhuber if (prefix_LRE(ccw++, cqr->data, first_trk, 3285f3eb5384SStefan Weinhuber last_trk, cmd, basedev, startdev, 3286f3eb5384SStefan Weinhuber 1 /* format */, first_offs + 1, 3287f3eb5384SStefan Weinhuber trkcount, blksize, 3288f3eb5384SStefan Weinhuber tlf) == -EAGAIN) { 3289f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 3290f3eb5384SStefan Weinhuber * Try again later. 3291f3eb5384SStefan Weinhuber */ 3292f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 3293f3eb5384SStefan Weinhuber return ERR_PTR(-EAGAIN); 3294f3eb5384SStefan Weinhuber } 3295f3eb5384SStefan Weinhuber 3296f3eb5384SStefan Weinhuber /* 3297f3eb5384SStefan Weinhuber * The translation of request into ccw programs must meet the 3298f3eb5384SStefan Weinhuber * following conditions: 3299f3eb5384SStefan Weinhuber * - all idaws but the first and the last must address full pages 3300f3eb5384SStefan Weinhuber * (or 2K blocks on 31-bit) 3301f3eb5384SStefan Weinhuber * - the scope of a ccw and it's idal ends with the track boundaries 3302f3eb5384SStefan Weinhuber */ 3303f3eb5384SStefan Weinhuber idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); 3304f3eb5384SStefan Weinhuber recid = first_rec; 3305f3eb5384SStefan Weinhuber new_track = 1; 3306f3eb5384SStefan Weinhuber end_idaw = 0; 3307f3eb5384SStefan Weinhuber len_to_track_end = 0; 3308246ccea1SMartin Schwidefsky idaw_dst = NULL; 3309f3eb5384SStefan Weinhuber idaw_len = 0; 3310f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 33117988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 33127988613bSKent Overstreet seg_len = bv.bv_len; 3313f3eb5384SStefan Weinhuber while (seg_len) { 3314f3eb5384SStefan Weinhuber if (new_track) { 3315f3eb5384SStefan Weinhuber trkid = recid; 3316f3eb5384SStefan Weinhuber recoffs = sector_div(trkid, blk_per_trk); 3317f3eb5384SStefan Weinhuber count_to_trk_end = blk_per_trk - recoffs; 3318f3eb5384SStefan Weinhuber count = min((last_rec - recid + 1), 3319f3eb5384SStefan Weinhuber (sector_t)count_to_trk_end); 3320f3eb5384SStefan Weinhuber len_to_track_end = count * blksize; 3321f3eb5384SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 3322f3eb5384SStefan Weinhuber ccw->cmd_code = cmd; 3323f3eb5384SStefan Weinhuber ccw->count = len_to_track_end; 3324f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 3325f3eb5384SStefan Weinhuber ccw->flags = CCW_FLAG_IDA; 3326f3eb5384SStefan Weinhuber ccw++; 3327f3eb5384SStefan Weinhuber recid += count; 3328f3eb5384SStefan Weinhuber new_track = 0; 332952db45c3SStefan Weinhuber /* first idaw for a ccw may start anywhere */ 333052db45c3SStefan Weinhuber if (!idaw_dst) 333152db45c3SStefan Weinhuber idaw_dst = dst; 3332f3eb5384SStefan Weinhuber } 333352db45c3SStefan Weinhuber /* If we start a new idaw, we must make sure that it 333452db45c3SStefan Weinhuber * starts on an IDA_BLOCK_SIZE boundary. 3335f3eb5384SStefan Weinhuber * If we continue an idaw, we must make sure that the 3336f3eb5384SStefan Weinhuber * current segment begins where the so far accumulated 3337f3eb5384SStefan Weinhuber * idaw ends 3338f3eb5384SStefan Weinhuber */ 333952db45c3SStefan Weinhuber if (!idaw_dst) { 334052db45c3SStefan Weinhuber if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { 334152db45c3SStefan Weinhuber dasd_sfree_request(cqr, startdev); 334252db45c3SStefan Weinhuber return ERR_PTR(-ERANGE); 334352db45c3SStefan Weinhuber } else 3344f3eb5384SStefan Weinhuber idaw_dst = dst; 334552db45c3SStefan Weinhuber } 3346f3eb5384SStefan Weinhuber if ((idaw_dst + idaw_len) != dst) { 3347f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 3348f3eb5384SStefan Weinhuber return ERR_PTR(-ERANGE); 3349f3eb5384SStefan Weinhuber } 3350f3eb5384SStefan Weinhuber part_len = min(seg_len, len_to_track_end); 3351f3eb5384SStefan Weinhuber seg_len -= part_len; 3352f3eb5384SStefan Weinhuber dst += part_len; 3353f3eb5384SStefan Weinhuber idaw_len += part_len; 3354f3eb5384SStefan Weinhuber len_to_track_end -= part_len; 3355f3eb5384SStefan Weinhuber /* collected memory area ends on an IDA_BLOCK border, 3356f3eb5384SStefan Weinhuber * -> create an idaw 3357f3eb5384SStefan Weinhuber * idal_create_words will handle cases where idaw_len 3358f3eb5384SStefan Weinhuber * is larger then IDA_BLOCK_SIZE 3359f3eb5384SStefan Weinhuber */ 3360f3eb5384SStefan Weinhuber if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) 3361f3eb5384SStefan Weinhuber end_idaw = 1; 3362f3eb5384SStefan Weinhuber /* We also need to end the idaw at track end */ 3363f3eb5384SStefan Weinhuber if (!len_to_track_end) { 3364f3eb5384SStefan Weinhuber new_track = 1; 3365f3eb5384SStefan Weinhuber end_idaw = 1; 3366f3eb5384SStefan Weinhuber } 3367f3eb5384SStefan Weinhuber if (end_idaw) { 3368f3eb5384SStefan Weinhuber idaws = idal_create_words(idaws, idaw_dst, 3369f3eb5384SStefan Weinhuber idaw_len); 3370246ccea1SMartin Schwidefsky idaw_dst = NULL; 3371f3eb5384SStefan Weinhuber idaw_len = 0; 3372f3eb5384SStefan Weinhuber end_idaw = 0; 3373f3eb5384SStefan Weinhuber } 3374f3eb5384SStefan Weinhuber } 3375f3eb5384SStefan Weinhuber } 3376f3eb5384SStefan Weinhuber 3377f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 3378f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 3379f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3380f3eb5384SStefan Weinhuber cqr->startdev = startdev; 3381f3eb5384SStefan Weinhuber cqr->memdev = startdev; 3382f3eb5384SStefan Weinhuber cqr->block = block; 33837c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 3384c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 33851f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 33861aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 3387f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 3388f3eb5384SStefan Weinhuber return cqr; 3389f3eb5384SStefan Weinhuber } 3390f3eb5384SStefan Weinhuber 3391f3eb5384SStefan Weinhuber static int prepare_itcw(struct itcw *itcw, 3392f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 3393f3eb5384SStefan Weinhuber struct dasd_device *basedev, 3394f3eb5384SStefan Weinhuber struct dasd_device *startdev, 3395f3eb5384SStefan Weinhuber unsigned int rec_on_trk, int count, 3396f3eb5384SStefan Weinhuber unsigned int blksize, 3397f3eb5384SStefan Weinhuber unsigned int total_data_size, 3398f3eb5384SStefan Weinhuber unsigned int tlf, 3399f3eb5384SStefan Weinhuber unsigned int blk_per_trk) 3400f3eb5384SStefan Weinhuber { 3401f3eb5384SStefan Weinhuber struct PFX_eckd_data pfxdata; 3402f3eb5384SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 3403f3eb5384SStefan Weinhuber struct DE_eckd_data *dedata; 3404f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 3405f3eb5384SStefan Weinhuber struct dcw *dcw; 3406f3eb5384SStefan Weinhuber 3407f3eb5384SStefan Weinhuber u32 begcyl, endcyl; 3408f3eb5384SStefan Weinhuber u16 heads, beghead, endhead; 3409f3eb5384SStefan Weinhuber u8 pfx_cmd; 3410f3eb5384SStefan Weinhuber 3411f3eb5384SStefan Weinhuber int rc = 0; 3412f3eb5384SStefan Weinhuber int sector = 0; 3413f3eb5384SStefan Weinhuber int dn, d; 3414f3eb5384SStefan Weinhuber 3415f3eb5384SStefan Weinhuber 3416f3eb5384SStefan Weinhuber /* setup prefix data */ 3417543691a4SSebastian Ott basepriv = basedev->private; 3418543691a4SSebastian Ott startpriv = startdev->private; 3419f3eb5384SStefan Weinhuber dedata = &pfxdata.define_extent; 3420f3eb5384SStefan Weinhuber lredata = &pfxdata.locate_record; 3421f3eb5384SStefan Weinhuber 3422f3eb5384SStefan Weinhuber memset(&pfxdata, 0, sizeof(pfxdata)); 3423f3eb5384SStefan Weinhuber pfxdata.format = 1; /* PFX with LRE */ 3424f3eb5384SStefan Weinhuber pfxdata.base_address = basepriv->ned->unit_addr; 3425f3eb5384SStefan Weinhuber pfxdata.base_lss = basepriv->ned->ID; 3426f3eb5384SStefan Weinhuber pfxdata.validity.define_extent = 1; 3427f3eb5384SStefan Weinhuber 3428f3eb5384SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 3429da340f92SStefan Haberland if (startpriv->uid.type == UA_BASE_PAV_ALIAS) 3430f3eb5384SStefan Weinhuber pfxdata.validity.verify_base = 1; 3431da340f92SStefan Haberland 3432da340f92SStefan Haberland if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) { 3433da340f92SStefan Haberland pfxdata.validity.verify_base = 1; 3434f3eb5384SStefan Weinhuber pfxdata.validity.hyper_pav = 1; 3435f3eb5384SStefan Weinhuber } 3436f3eb5384SStefan Weinhuber 3437f3eb5384SStefan Weinhuber switch (cmd) { 3438f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 3439f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 3440f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 3441f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 3442f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 3443f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 3444f3eb5384SStefan Weinhuber lredata->operation.operation = 0x0C; 3445f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x01; 3446f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX_READ; 3447f3eb5384SStefan Weinhuber break; 3448f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 3449f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 3450f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 3451f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 34525628683cSStefan Haberland rc = set_timestamp(NULL, dedata, basedev); 3453f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 3454f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 3455f3eb5384SStefan Weinhuber lredata->operation.operation = 0x3F; 3456f3eb5384SStefan Weinhuber lredata->extended_operation = 0x23; 3457f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x2; 345845f186beSJan Höppner /* 345945f186beSJan Höppner * If XRC is supported the System Time Stamp is set. The 346045f186beSJan Höppner * validity of the time stamp must be reflected in the prefix 346145f186beSJan Höppner * data as well. 346245f186beSJan Höppner */ 346345f186beSJan Höppner if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02) 346445f186beSJan Höppner pfxdata.validity.time_stamp = 1; /* 'Time Stamp Valid' */ 3465f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX; 3466f3eb5384SStefan Weinhuber break; 34678fd57520SJan Höppner case DASD_ECKD_CCW_READ_COUNT_MT: 34688fd57520SJan Höppner dedata->mask.perm = 0x1; 34698fd57520SJan Höppner dedata->attributes.operation = DASD_BYPASS_CACHE; 34708fd57520SJan Höppner dedata->ga_extended |= 0x42; 34718fd57520SJan Höppner dedata->blk_size = blksize; 34728fd57520SJan Höppner lredata->operation.orientation = 0x2; 34738fd57520SJan Höppner lredata->operation.operation = 0x16; 34748fd57520SJan Höppner lredata->auxiliary.check_bytes = 0x01; 34758fd57520SJan Höppner pfx_cmd = DASD_ECKD_CCW_PFX_READ; 34768fd57520SJan Höppner break; 3477f3eb5384SStefan Weinhuber default: 3478f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 3479f3eb5384SStefan Weinhuber "prepare itcw, unknown opcode 0x%x", cmd); 3480f3eb5384SStefan Weinhuber BUG(); 3481f3eb5384SStefan Weinhuber break; 3482f3eb5384SStefan Weinhuber } 3483f3eb5384SStefan Weinhuber if (rc) 3484f3eb5384SStefan Weinhuber return rc; 3485f3eb5384SStefan Weinhuber 3486f3eb5384SStefan Weinhuber dedata->attributes.mode = 0x3; /* ECKD */ 3487f3eb5384SStefan Weinhuber 3488f3eb5384SStefan Weinhuber heads = basepriv->rdc_data.trk_per_cyl; 3489f3eb5384SStefan Weinhuber begcyl = trk / heads; 3490f3eb5384SStefan Weinhuber beghead = trk % heads; 3491f3eb5384SStefan Weinhuber endcyl = totrk / heads; 3492f3eb5384SStefan Weinhuber endhead = totrk % heads; 3493f3eb5384SStefan Weinhuber 3494f3eb5384SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 3495f3eb5384SStefan Weinhuber if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 3496f3eb5384SStefan Weinhuber dedata->attributes.operation == DASD_SEQ_ACCESS) { 3497f3eb5384SStefan Weinhuber 3498f3eb5384SStefan Weinhuber if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 3499f3eb5384SStefan Weinhuber endcyl += basepriv->attrib.nr_cyl; 3500f3eb5384SStefan Weinhuber else 3501f3eb5384SStefan Weinhuber endcyl = (basepriv->real_cyl - 1); 3502f3eb5384SStefan Weinhuber } 3503f3eb5384SStefan Weinhuber 3504f3eb5384SStefan Weinhuber set_ch_t(&dedata->beg_ext, begcyl, beghead); 3505f3eb5384SStefan Weinhuber set_ch_t(&dedata->end_ext, endcyl, endhead); 3506f3eb5384SStefan Weinhuber 3507f3eb5384SStefan Weinhuber dedata->ep_format = 0x20; /* records per track is valid */ 3508f3eb5384SStefan Weinhuber dedata->ep_rec_per_track = blk_per_trk; 3509f3eb5384SStefan Weinhuber 3510f3eb5384SStefan Weinhuber if (rec_on_trk) { 3511f3eb5384SStefan Weinhuber switch (basepriv->rdc_data.dev_type) { 3512f3eb5384SStefan Weinhuber case 0x3390: 3513f3eb5384SStefan Weinhuber dn = ceil_quot(blksize + 6, 232); 3514f3eb5384SStefan Weinhuber d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); 3515f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 3516f3eb5384SStefan Weinhuber break; 3517f3eb5384SStefan Weinhuber case 0x3380: 3518f3eb5384SStefan Weinhuber d = 7 + ceil_quot(blksize + 12, 32); 3519f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 3520f3eb5384SStefan Weinhuber break; 3521f3eb5384SStefan Weinhuber } 3522f3eb5384SStefan Weinhuber } 3523f3eb5384SStefan Weinhuber 35248fd57520SJan Höppner if (cmd == DASD_ECKD_CCW_READ_COUNT_MT) { 35258fd57520SJan Höppner lredata->auxiliary.length_valid = 0; 35268fd57520SJan Höppner lredata->auxiliary.length_scope = 0; 35278fd57520SJan Höppner lredata->sector = 0xff; 35288fd57520SJan Höppner } else { 3529f3eb5384SStefan Weinhuber lredata->auxiliary.length_valid = 1; 3530f3eb5384SStefan Weinhuber lredata->auxiliary.length_scope = 1; 35318fd57520SJan Höppner lredata->sector = sector; 35328fd57520SJan Höppner } 3533f3eb5384SStefan Weinhuber lredata->auxiliary.imbedded_ccw_valid = 1; 3534f3eb5384SStefan Weinhuber lredata->length = tlf; 3535f3eb5384SStefan Weinhuber lredata->imbedded_ccw = cmd; 3536f3eb5384SStefan Weinhuber lredata->count = count; 3537f3eb5384SStefan Weinhuber set_ch_t(&lredata->seek_addr, begcyl, beghead); 3538f3eb5384SStefan Weinhuber lredata->search_arg.cyl = lredata->seek_addr.cyl; 3539f3eb5384SStefan Weinhuber lredata->search_arg.head = lredata->seek_addr.head; 3540f3eb5384SStefan Weinhuber lredata->search_arg.record = rec_on_trk; 3541f3eb5384SStefan Weinhuber 3542f3eb5384SStefan Weinhuber dcw = itcw_add_dcw(itcw, pfx_cmd, 0, 3543f3eb5384SStefan Weinhuber &pfxdata, sizeof(pfxdata), total_data_size); 3544757853eaSGustavo A. R. Silva return PTR_ERR_OR_ZERO(dcw); 3545f3eb5384SStefan Weinhuber } 3546f3eb5384SStefan Weinhuber 3547f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 3548f3eb5384SStefan Weinhuber struct dasd_device *startdev, 3549f3eb5384SStefan Weinhuber struct dasd_block *block, 3550f3eb5384SStefan Weinhuber struct request *req, 3551f3eb5384SStefan Weinhuber sector_t first_rec, 3552f3eb5384SStefan Weinhuber sector_t last_rec, 3553f3eb5384SStefan Weinhuber sector_t first_trk, 3554f3eb5384SStefan Weinhuber sector_t last_trk, 3555f3eb5384SStefan Weinhuber unsigned int first_offs, 3556f3eb5384SStefan Weinhuber unsigned int last_offs, 3557f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 3558f3eb5384SStefan Weinhuber unsigned int blksize) 3559f3eb5384SStefan Weinhuber { 3560f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 3561f3eb5384SStefan Weinhuber struct req_iterator iter; 35627988613bSKent Overstreet struct bio_vec bv; 3563f3eb5384SStefan Weinhuber char *dst; 3564f3eb5384SStefan Weinhuber unsigned int trkcount, ctidaw; 3565f3eb5384SStefan Weinhuber unsigned char cmd; 3566f3eb5384SStefan Weinhuber struct dasd_device *basedev; 3567f3eb5384SStefan Weinhuber unsigned int tlf; 3568f3eb5384SStefan Weinhuber struct itcw *itcw; 3569f3eb5384SStefan Weinhuber struct tidaw *last_tidaw = NULL; 3570f3eb5384SStefan Weinhuber int itcw_op; 3571f3eb5384SStefan Weinhuber size_t itcw_size; 3572ef19298bSStefan Weinhuber u8 tidaw_flags; 3573ef19298bSStefan Weinhuber unsigned int seg_len, part_len, len_to_track_end; 3574ef19298bSStefan Weinhuber unsigned char new_track; 3575ef19298bSStefan Weinhuber sector_t recid, trkid; 3576ef19298bSStefan Weinhuber unsigned int offs; 3577ef19298bSStefan Weinhuber unsigned int count, count_to_trk_end; 3578cd10502bSJulia Lawall int ret; 3579f3eb5384SStefan Weinhuber 3580f3eb5384SStefan Weinhuber basedev = block->base; 3581f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) { 3582f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 3583f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_READ; 3584f3eb5384SStefan Weinhuber } else if (rq_data_dir(req) == WRITE) { 3585f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 3586f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_WRITE; 3587f3eb5384SStefan Weinhuber } else 3588f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 3589f3eb5384SStefan Weinhuber 3590f3eb5384SStefan Weinhuber /* trackbased I/O needs address all memory via TIDAWs, 3591f3eb5384SStefan Weinhuber * not just for 64 bit addresses. This allows us to map 3592f3eb5384SStefan Weinhuber * each segment directly to one tidaw. 3593ef19298bSStefan Weinhuber * In the case of write requests, additional tidaws may 3594ef19298bSStefan Weinhuber * be needed when a segment crosses a track boundary. 3595f3eb5384SStefan Weinhuber */ 3596f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 3597f3eb5384SStefan Weinhuber ctidaw = 0; 3598f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 3599f3eb5384SStefan Weinhuber ++ctidaw; 3600f3eb5384SStefan Weinhuber } 3601ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 3602ef19298bSStefan Weinhuber ctidaw += (last_trk - first_trk); 3603f3eb5384SStefan Weinhuber 3604f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 3605f3eb5384SStefan Weinhuber itcw_size = itcw_calc_size(0, ctidaw, 0); 3606c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev, 3607c5205f2fSSebastian Ott blk_mq_rq_to_pdu(req)); 3608f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 3609f3eb5384SStefan Weinhuber return cqr; 3610f3eb5384SStefan Weinhuber 3611f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 3612f3eb5384SStefan Weinhuber if (first_trk == last_trk) 3613f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 3614f3eb5384SStefan Weinhuber else 3615f3eb5384SStefan Weinhuber tlf = last_offs + 1; 3616f3eb5384SStefan Weinhuber tlf *= blksize; 3617f3eb5384SStefan Weinhuber 3618f3eb5384SStefan Weinhuber itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); 3619ef19298bSStefan Weinhuber if (IS_ERR(itcw)) { 3620cd10502bSJulia Lawall ret = -EINVAL; 3621cd10502bSJulia Lawall goto out_error; 3622ef19298bSStefan Weinhuber } 3623f3eb5384SStefan Weinhuber cqr->cpaddr = itcw_get_tcw(itcw); 3624f3eb5384SStefan Weinhuber if (prepare_itcw(itcw, first_trk, last_trk, 3625f3eb5384SStefan Weinhuber cmd, basedev, startdev, 3626f3eb5384SStefan Weinhuber first_offs + 1, 3627f3eb5384SStefan Weinhuber trkcount, blksize, 3628f3eb5384SStefan Weinhuber (last_rec - first_rec + 1) * blksize, 3629f3eb5384SStefan Weinhuber tlf, blk_per_trk) == -EAGAIN) { 3630f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 3631f3eb5384SStefan Weinhuber * Try again later. 3632f3eb5384SStefan Weinhuber */ 3633cd10502bSJulia Lawall ret = -EAGAIN; 3634cd10502bSJulia Lawall goto out_error; 3635f3eb5384SStefan Weinhuber } 3636d54cddb6SHeiko Carstens len_to_track_end = 0; 3637f3eb5384SStefan Weinhuber /* 3638f3eb5384SStefan Weinhuber * A tidaw can address 4k of memory, but must not cross page boundaries 3639f3eb5384SStefan Weinhuber * We can let the block layer handle this by setting 3640f3eb5384SStefan Weinhuber * blk_queue_segment_boundary to page boundaries and 3641f3eb5384SStefan Weinhuber * blk_max_segment_size to page size when setting up the request queue. 3642ef19298bSStefan Weinhuber * For write requests, a TIDAW must not cross track boundaries, because 3643ef19298bSStefan Weinhuber * we have to set the CBC flag on the last tidaw for each track. 3644f3eb5384SStefan Weinhuber */ 3645ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) { 3646ef19298bSStefan Weinhuber new_track = 1; 3647ef19298bSStefan Weinhuber recid = first_rec; 3648f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 36497988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 36507988613bSKent Overstreet seg_len = bv.bv_len; 3651ef19298bSStefan Weinhuber while (seg_len) { 3652ef19298bSStefan Weinhuber if (new_track) { 3653ef19298bSStefan Weinhuber trkid = recid; 3654ef19298bSStefan Weinhuber offs = sector_div(trkid, blk_per_trk); 3655ef19298bSStefan Weinhuber count_to_trk_end = blk_per_trk - offs; 3656ef19298bSStefan Weinhuber count = min((last_rec - recid + 1), 3657ef19298bSStefan Weinhuber (sector_t)count_to_trk_end); 3658ef19298bSStefan Weinhuber len_to_track_end = count * blksize; 3659ef19298bSStefan Weinhuber recid += count; 3660ef19298bSStefan Weinhuber new_track = 0; 3661f3eb5384SStefan Weinhuber } 3662ef19298bSStefan Weinhuber part_len = min(seg_len, len_to_track_end); 3663ef19298bSStefan Weinhuber seg_len -= part_len; 3664ef19298bSStefan Weinhuber len_to_track_end -= part_len; 3665ef19298bSStefan Weinhuber /* We need to end the tidaw at track end */ 3666ef19298bSStefan Weinhuber if (!len_to_track_end) { 3667ef19298bSStefan Weinhuber new_track = 1; 3668ef19298bSStefan Weinhuber tidaw_flags = TIDAW_FLAGS_INSERT_CBC; 3669ef19298bSStefan Weinhuber } else 3670ef19298bSStefan Weinhuber tidaw_flags = 0; 3671ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, 3672ef19298bSStefan Weinhuber dst, part_len); 3673cd10502bSJulia Lawall if (IS_ERR(last_tidaw)) { 3674cd10502bSJulia Lawall ret = -EINVAL; 3675cd10502bSJulia Lawall goto out_error; 3676cd10502bSJulia Lawall } 3677ef19298bSStefan Weinhuber dst += part_len; 3678ef19298bSStefan Weinhuber } 3679ef19298bSStefan Weinhuber } 3680ef19298bSStefan Weinhuber } else { 3681ef19298bSStefan Weinhuber rq_for_each_segment(bv, req, iter) { 36827988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 3683ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, 0x00, 36847988613bSKent Overstreet dst, bv.bv_len); 3685cd10502bSJulia Lawall if (IS_ERR(last_tidaw)) { 3686cd10502bSJulia Lawall ret = -EINVAL; 3687cd10502bSJulia Lawall goto out_error; 3688cd10502bSJulia Lawall } 3689ef19298bSStefan Weinhuber } 3690ef19298bSStefan Weinhuber } 3691ef19298bSStefan Weinhuber last_tidaw->flags |= TIDAW_FLAGS_LAST; 3692ef19298bSStefan Weinhuber last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; 3693f3eb5384SStefan Weinhuber itcw_finalize(itcw); 3694f3eb5384SStefan Weinhuber 3695f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 3696f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 3697f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3698ef19298bSStefan Weinhuber cqr->cpmode = 1; 3699f3eb5384SStefan Weinhuber cqr->startdev = startdev; 3700f3eb5384SStefan Weinhuber cqr->memdev = startdev; 3701f3eb5384SStefan Weinhuber cqr->block = block; 37027c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 3703c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 37041f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 37051aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 3706f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 3707f3eb5384SStefan Weinhuber return cqr; 3708cd10502bSJulia Lawall out_error: 3709cd10502bSJulia Lawall dasd_sfree_request(cqr, startdev); 3710cd10502bSJulia Lawall return ERR_PTR(ret); 3711f3eb5384SStefan Weinhuber } 3712f3eb5384SStefan Weinhuber 3713f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 3714f3eb5384SStefan Weinhuber struct dasd_block *block, 3715f3eb5384SStefan Weinhuber struct request *req) 3716f3eb5384SStefan Weinhuber { 3717ef19298bSStefan Weinhuber int cmdrtd, cmdwtd; 3718f3eb5384SStefan Weinhuber int use_prefix; 3719ef19298bSStefan Weinhuber int fcx_multitrack; 372045b44d76SStefan Weinhuber struct dasd_eckd_private *private; 3721f3eb5384SStefan Weinhuber struct dasd_device *basedev; 3722f3eb5384SStefan Weinhuber sector_t first_rec, last_rec; 3723f3eb5384SStefan Weinhuber sector_t first_trk, last_trk; 3724f3eb5384SStefan Weinhuber unsigned int first_offs, last_offs; 3725f3eb5384SStefan Weinhuber unsigned int blk_per_trk, blksize; 3726f3eb5384SStefan Weinhuber int cdlspecial; 3727ef19298bSStefan Weinhuber unsigned int data_size; 3728f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 3729f3eb5384SStefan Weinhuber 3730f3eb5384SStefan Weinhuber basedev = block->base; 3731543691a4SSebastian Ott private = basedev->private; 3732f3eb5384SStefan Weinhuber 3733f3eb5384SStefan Weinhuber /* Calculate number of blocks/records per track. */ 3734f3eb5384SStefan Weinhuber blksize = block->bp_block; 3735f3eb5384SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 37366fca97a9SStefan Haberland if (blk_per_trk == 0) 37376fca97a9SStefan Haberland return ERR_PTR(-EINVAL); 3738f3eb5384SStefan Weinhuber /* Calculate record id of first and last block. */ 373983096ebfSTejun Heo first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; 3740f3eb5384SStefan Weinhuber first_offs = sector_div(first_trk, blk_per_trk); 3741f3eb5384SStefan Weinhuber last_rec = last_trk = 374283096ebfSTejun Heo (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 3743f3eb5384SStefan Weinhuber last_offs = sector_div(last_trk, blk_per_trk); 3744f3eb5384SStefan Weinhuber cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); 3745f3eb5384SStefan Weinhuber 3746ef19298bSStefan Weinhuber fcx_multitrack = private->features.feature[40] & 0x20; 3747ef19298bSStefan Weinhuber data_size = blk_rq_bytes(req); 374826a35f37SStefan Weinhuber if (data_size % blksize) 374926a35f37SStefan Weinhuber return ERR_PTR(-EINVAL); 3750ef19298bSStefan Weinhuber /* tpm write request add CBC data on each track boundary */ 3751ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 3752ef19298bSStefan Weinhuber data_size += (last_trk - first_trk) * 4; 3753f3eb5384SStefan Weinhuber 3754f3eb5384SStefan Weinhuber /* is read track data and write track data in command mode supported? */ 3755f3eb5384SStefan Weinhuber cmdrtd = private->features.feature[9] & 0x20; 3756f3eb5384SStefan Weinhuber cmdwtd = private->features.feature[12] & 0x40; 3757f3eb5384SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 3758f3eb5384SStefan Weinhuber 3759f3eb5384SStefan Weinhuber cqr = NULL; 3760f3eb5384SStefan Weinhuber if (cdlspecial || dasd_page_cache) { 3761f3eb5384SStefan Weinhuber /* do nothing, just fall through to the cmd mode single case */ 3762ef19298bSStefan Weinhuber } else if ((data_size <= private->fcx_max_data) 3763ef19298bSStefan Weinhuber && (fcx_multitrack || (first_trk == last_trk))) { 3764f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, 3765f3eb5384SStefan Weinhuber first_rec, last_rec, 3766f3eb5384SStefan Weinhuber first_trk, last_trk, 3767f3eb5384SStefan Weinhuber first_offs, last_offs, 3768f3eb5384SStefan Weinhuber blk_per_trk, blksize); 3769ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3770ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 3771f3eb5384SStefan Weinhuber cqr = NULL; 3772f3eb5384SStefan Weinhuber } else if (use_prefix && 3773f3eb5384SStefan Weinhuber (((rq_data_dir(req) == READ) && cmdrtd) || 3774f3eb5384SStefan Weinhuber ((rq_data_dir(req) == WRITE) && cmdwtd))) { 3775f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, 3776f3eb5384SStefan Weinhuber first_rec, last_rec, 3777f3eb5384SStefan Weinhuber first_trk, last_trk, 3778f3eb5384SStefan Weinhuber first_offs, last_offs, 3779f3eb5384SStefan Weinhuber blk_per_trk, blksize); 3780ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3781ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 3782f3eb5384SStefan Weinhuber cqr = NULL; 3783f3eb5384SStefan Weinhuber } 3784f3eb5384SStefan Weinhuber if (!cqr) 3785f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, 3786f3eb5384SStefan Weinhuber first_rec, last_rec, 3787f3eb5384SStefan Weinhuber first_trk, last_trk, 3788f3eb5384SStefan Weinhuber first_offs, last_offs, 3789f3eb5384SStefan Weinhuber blk_per_trk, blksize); 3790f3eb5384SStefan Weinhuber return cqr; 3791f3eb5384SStefan Weinhuber } 3792f3eb5384SStefan Weinhuber 3793bbc7f7eaSJan Höppner static struct dasd_ccw_req *dasd_eckd_build_cp_raw(struct dasd_device *startdev, 3794e4dbb0f2SStefan Haberland struct dasd_block *block, 3795e4dbb0f2SStefan Haberland struct request *req) 3796e4dbb0f2SStefan Haberland { 37979d2be0c1SJan Höppner sector_t start_padding_sectors, end_sector_offset, end_padding_sectors; 3798e4dbb0f2SStefan Haberland unsigned int seg_len, len_to_track_end; 3799e4dbb0f2SStefan Haberland unsigned int cidaw, cplength, datasize; 3800558b9ef0SStefan Weinhuber sector_t first_trk, last_trk, sectors; 38019d2be0c1SJan Höppner struct dasd_eckd_private *base_priv; 38029d2be0c1SJan Höppner struct dasd_device *basedev; 38039d2be0c1SJan Höppner struct req_iterator iter; 38049d2be0c1SJan Höppner struct dasd_ccw_req *cqr; 38059d2be0c1SJan Höppner unsigned int first_offs; 38069d2be0c1SJan Höppner unsigned int trkcount; 38079d2be0c1SJan Höppner unsigned long *idaws; 38089d2be0c1SJan Höppner unsigned int size; 38099d2be0c1SJan Höppner unsigned char cmd; 38109d2be0c1SJan Höppner struct bio_vec bv; 38119d2be0c1SJan Höppner struct ccw1 *ccw; 38129d2be0c1SJan Höppner int use_prefix; 38139d2be0c1SJan Höppner void *data; 38149d2be0c1SJan Höppner char *dst; 3815e4dbb0f2SStefan Haberland 3816e4dbb0f2SStefan Haberland /* 3817e4dbb0f2SStefan Haberland * raw track access needs to be mutiple of 64k and on 64k boundary 3818558b9ef0SStefan Weinhuber * For read requests we can fix an incorrect alignment by padding 3819558b9ef0SStefan Weinhuber * the request with dummy pages. 3820e4dbb0f2SStefan Haberland */ 3821558b9ef0SStefan Weinhuber start_padding_sectors = blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK; 3822558b9ef0SStefan Weinhuber end_sector_offset = (blk_rq_pos(req) + blk_rq_sectors(req)) % 3823558b9ef0SStefan Weinhuber DASD_RAW_SECTORS_PER_TRACK; 3824558b9ef0SStefan Weinhuber end_padding_sectors = (DASD_RAW_SECTORS_PER_TRACK - end_sector_offset) % 3825558b9ef0SStefan Weinhuber DASD_RAW_SECTORS_PER_TRACK; 3826558b9ef0SStefan Weinhuber basedev = block->base; 3827558b9ef0SStefan Weinhuber if ((start_padding_sectors || end_padding_sectors) && 3828558b9ef0SStefan Weinhuber (rq_data_dir(req) == WRITE)) { 3829558b9ef0SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 3830e78c21d1SMing Lei "raw write not track aligned (%llu,%llu) req %p", 3831558b9ef0SStefan Weinhuber start_padding_sectors, end_padding_sectors, req); 38329d2be0c1SJan Höppner return ERR_PTR(-EINVAL); 3833e4dbb0f2SStefan Haberland } 3834e4dbb0f2SStefan Haberland 3835e4dbb0f2SStefan Haberland first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; 3836e4dbb0f2SStefan Haberland last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / 3837e4dbb0f2SStefan Haberland DASD_RAW_SECTORS_PER_TRACK; 3838e4dbb0f2SStefan Haberland trkcount = last_trk - first_trk + 1; 3839e4dbb0f2SStefan Haberland first_offs = 0; 3840e4dbb0f2SStefan Haberland 3841e4dbb0f2SStefan Haberland if (rq_data_dir(req) == READ) 3842e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_READ_TRACK; 3843e4dbb0f2SStefan Haberland else if (rq_data_dir(req) == WRITE) 3844e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; 38459d2be0c1SJan Höppner else 38469d2be0c1SJan Höppner return ERR_PTR(-EINVAL); 3847e4dbb0f2SStefan Haberland 3848e4dbb0f2SStefan Haberland /* 3849e4dbb0f2SStefan Haberland * Raw track based I/O needs IDAWs for each page, 3850e4dbb0f2SStefan Haberland * and not just for 64 bit addresses. 3851e4dbb0f2SStefan Haberland */ 3852e4dbb0f2SStefan Haberland cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; 3853e4dbb0f2SStefan Haberland 3854e4dbb0f2SStefan Haberland /* 38559d2be0c1SJan Höppner * struct PFX_eckd_data and struct LRE_eckd_data can have up to 2 bytes 38569d2be0c1SJan Höppner * of extended parameter. This is needed for write full track. 3857e4dbb0f2SStefan Haberland */ 38589d2be0c1SJan Höppner base_priv = basedev->private; 38599d2be0c1SJan Höppner use_prefix = base_priv->features.feature[8] & 0x01; 38609d2be0c1SJan Höppner if (use_prefix) { 38619d2be0c1SJan Höppner cplength = 1 + trkcount; 38629d2be0c1SJan Höppner size = sizeof(struct PFX_eckd_data) + 2; 38639d2be0c1SJan Höppner } else { 38649d2be0c1SJan Höppner cplength = 2 + trkcount; 38659d2be0c1SJan Höppner size = sizeof(struct DE_eckd_data) + 38669d2be0c1SJan Höppner sizeof(struct LRE_eckd_data) + 2; 38679d2be0c1SJan Höppner } 38689d2be0c1SJan Höppner size = ALIGN(size, 8); 3869e4dbb0f2SStefan Haberland 38707bf76f01SJan Höppner datasize = size + cidaw * sizeof(unsigned long); 3871e4dbb0f2SStefan Haberland 3872e4dbb0f2SStefan Haberland /* Allocate the ccw request. */ 3873e4dbb0f2SStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 3874c5205f2fSSebastian Ott datasize, startdev, blk_mq_rq_to_pdu(req)); 3875e4dbb0f2SStefan Haberland if (IS_ERR(cqr)) 38769d2be0c1SJan Höppner return cqr; 3877e4dbb0f2SStefan Haberland 38789d2be0c1SJan Höppner ccw = cqr->cpaddr; 38799d2be0c1SJan Höppner data = cqr->data; 38809d2be0c1SJan Höppner 38819d2be0c1SJan Höppner if (use_prefix) { 38829d2be0c1SJan Höppner prefix_LRE(ccw++, data, first_trk, last_trk, cmd, basedev, 38839d2be0c1SJan Höppner startdev, 1, first_offs + 1, trkcount, 0, 0); 38849d2be0c1SJan Höppner } else { 38859d2be0c1SJan Höppner define_extent(ccw++, data, first_trk, last_trk, cmd, basedev, 0); 38869d2be0c1SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 38879d2be0c1SJan Höppner 38889d2be0c1SJan Höppner data += sizeof(struct DE_eckd_data); 38899d2be0c1SJan Höppner locate_record_ext(ccw++, data, first_trk, first_offs + 1, 38909d2be0c1SJan Höppner trkcount, cmd, basedev, 0, 0); 3891e4dbb0f2SStefan Haberland } 3892e4dbb0f2SStefan Haberland 38939d2be0c1SJan Höppner idaws = (unsigned long *)(cqr->data + size); 3894e4dbb0f2SStefan Haberland len_to_track_end = 0; 3895558b9ef0SStefan Weinhuber if (start_padding_sectors) { 3896558b9ef0SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 3897558b9ef0SStefan Weinhuber ccw->cmd_code = cmd; 3898558b9ef0SStefan Weinhuber /* maximum 3390 track size */ 3899558b9ef0SStefan Weinhuber ccw->count = 57326; 3900558b9ef0SStefan Weinhuber /* 64k map to one track */ 3901558b9ef0SStefan Weinhuber len_to_track_end = 65536 - start_padding_sectors * 512; 3902558b9ef0SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 3903558b9ef0SStefan Weinhuber ccw->flags |= CCW_FLAG_IDA; 3904558b9ef0SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3905558b9ef0SStefan Weinhuber ccw++; 3906558b9ef0SStefan Weinhuber for (sectors = 0; sectors < start_padding_sectors; sectors += 8) 3907558b9ef0SStefan Weinhuber idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 3908558b9ef0SStefan Weinhuber } 3909e4dbb0f2SStefan Haberland rq_for_each_segment(bv, req, iter) { 39107988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 39117988613bSKent Overstreet seg_len = bv.bv_len; 3912558b9ef0SStefan Weinhuber if (cmd == DASD_ECKD_CCW_READ_TRACK) 3913558b9ef0SStefan Weinhuber memset(dst, 0, seg_len); 3914e4dbb0f2SStefan Haberland if (!len_to_track_end) { 3915e4dbb0f2SStefan Haberland ccw[-1].flags |= CCW_FLAG_CC; 3916e4dbb0f2SStefan Haberland ccw->cmd_code = cmd; 3917e4dbb0f2SStefan Haberland /* maximum 3390 track size */ 3918e4dbb0f2SStefan Haberland ccw->count = 57326; 3919e4dbb0f2SStefan Haberland /* 64k map to one track */ 3920e4dbb0f2SStefan Haberland len_to_track_end = 65536; 3921e4dbb0f2SStefan Haberland ccw->cda = (__u32)(addr_t)idaws; 3922e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_IDA; 3923e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 3924e4dbb0f2SStefan Haberland ccw++; 3925e4dbb0f2SStefan Haberland } 3926e4dbb0f2SStefan Haberland len_to_track_end -= seg_len; 3927e4dbb0f2SStefan Haberland idaws = idal_create_words(idaws, dst, seg_len); 3928e4dbb0f2SStefan Haberland } 3929558b9ef0SStefan Weinhuber for (sectors = 0; sectors < end_padding_sectors; sectors += 8) 3930558b9ef0SStefan Weinhuber idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 3931e4dbb0f2SStefan Haberland if (blk_noretry_request(req) || 3932e4dbb0f2SStefan Haberland block->base->features & DASD_FEATURE_FAILFAST) 3933e4dbb0f2SStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3934e4dbb0f2SStefan Haberland cqr->startdev = startdev; 3935e4dbb0f2SStefan Haberland cqr->memdev = startdev; 3936e4dbb0f2SStefan Haberland cqr->block = block; 3937e4dbb0f2SStefan Haberland cqr->expires = startdev->default_expires * HZ; 3938c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 39391f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 39401aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 3941e4dbb0f2SStefan Haberland cqr->status = DASD_CQR_FILLED; 3942e4dbb0f2SStefan Haberland 3943e4dbb0f2SStefan Haberland return cqr; 3944e4dbb0f2SStefan Haberland } 3945e4dbb0f2SStefan Haberland 3946e4dbb0f2SStefan Haberland 39471da177e4SLinus Torvalds static int 39481da177e4SLinus Torvalds dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 39491da177e4SLinus Torvalds { 39501da177e4SLinus Torvalds struct dasd_eckd_private *private; 39511da177e4SLinus Torvalds struct ccw1 *ccw; 39525705f702SNeilBrown struct req_iterator iter; 39537988613bSKent Overstreet struct bio_vec bv; 39541da177e4SLinus Torvalds char *dst, *cda; 39551da177e4SLinus Torvalds unsigned int blksize, blk_per_trk, off; 39561da177e4SLinus Torvalds sector_t recid; 39575705f702SNeilBrown int status; 39581da177e4SLinus Torvalds 39591da177e4SLinus Torvalds if (!dasd_page_cache) 39601da177e4SLinus Torvalds goto out; 3961543691a4SSebastian Ott private = cqr->block->base->private; 39628e09f215SStefan Weinhuber blksize = cqr->block->bp_block; 39631da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 396483096ebfSTejun Heo recid = blk_rq_pos(req) >> cqr->block->s2b_shift; 39651da177e4SLinus Torvalds ccw = cqr->cpaddr; 39661da177e4SLinus Torvalds /* Skip over define extent & locate record. */ 39671da177e4SLinus Torvalds ccw++; 39681da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 39691da177e4SLinus Torvalds ccw++; 39705705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 39717988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 39727988613bSKent Overstreet for (off = 0; off < bv.bv_len; off += blksize) { 39731da177e4SLinus Torvalds /* Skip locate record. */ 39741da177e4SLinus Torvalds if (private->uses_cdl && recid <= 2*blk_per_trk) 39751da177e4SLinus Torvalds ccw++; 39761da177e4SLinus Torvalds if (dst) { 39771da177e4SLinus Torvalds if (ccw->flags & CCW_FLAG_IDA) 39781da177e4SLinus Torvalds cda = *((char **)((addr_t) ccw->cda)); 39791da177e4SLinus Torvalds else 39801da177e4SLinus Torvalds cda = (char *)((addr_t) ccw->cda); 39811da177e4SLinus Torvalds if (dst != cda) { 39821da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 39837988613bSKent Overstreet memcpy(dst, cda, bv.bv_len); 39841da177e4SLinus Torvalds kmem_cache_free(dasd_page_cache, 39851da177e4SLinus Torvalds (void *)((addr_t)cda & PAGE_MASK)); 39861da177e4SLinus Torvalds } 39871da177e4SLinus Torvalds dst = NULL; 39881da177e4SLinus Torvalds } 39891da177e4SLinus Torvalds ccw++; 39901da177e4SLinus Torvalds recid++; 39911da177e4SLinus Torvalds } 39921da177e4SLinus Torvalds } 39931da177e4SLinus Torvalds out: 39941da177e4SLinus Torvalds status = cqr->status == DASD_CQR_DONE; 39958e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 39961da177e4SLinus Torvalds return status; 39971da177e4SLinus Torvalds } 39981da177e4SLinus Torvalds 39998e09f215SStefan Weinhuber /* 4000f3eb5384SStefan Weinhuber * Modify ccw/tcw in cqr so it can be started on a base device. 40018e09f215SStefan Weinhuber * 40028e09f215SStefan Weinhuber * Note that this is not enough to restart the cqr! 40038e09f215SStefan Weinhuber * Either reset cqr->startdev as well (summary unit check handling) 40048e09f215SStefan Weinhuber * or restart via separate cqr (as in ERP handling). 40058e09f215SStefan Weinhuber */ 40068e09f215SStefan Weinhuber void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 40078e09f215SStefan Weinhuber { 40088e09f215SStefan Weinhuber struct ccw1 *ccw; 40098e09f215SStefan Weinhuber struct PFX_eckd_data *pfxdata; 4010f3eb5384SStefan Weinhuber struct tcw *tcw; 4011f3eb5384SStefan Weinhuber struct tccb *tccb; 4012f3eb5384SStefan Weinhuber struct dcw *dcw; 40138e09f215SStefan Weinhuber 4014f3eb5384SStefan Weinhuber if (cqr->cpmode == 1) { 4015f3eb5384SStefan Weinhuber tcw = cqr->cpaddr; 4016f3eb5384SStefan Weinhuber tccb = tcw_get_tccb(tcw); 4017f3eb5384SStefan Weinhuber dcw = (struct dcw *)&tccb->tca[0]; 4018f3eb5384SStefan Weinhuber pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; 4019f3eb5384SStefan Weinhuber pfxdata->validity.verify_base = 0; 4020f3eb5384SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 4021f3eb5384SStefan Weinhuber } else { 40228e09f215SStefan Weinhuber ccw = cqr->cpaddr; 40238e09f215SStefan Weinhuber pfxdata = cqr->data; 40248e09f215SStefan Weinhuber if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 40258e09f215SStefan Weinhuber pfxdata->validity.verify_base = 0; 40268e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 40278e09f215SStefan Weinhuber } 40288e09f215SStefan Weinhuber } 4029f3eb5384SStefan Weinhuber } 40308e09f215SStefan Weinhuber 40318e09f215SStefan Weinhuber #define DASD_ECKD_CHANQ_MAX_SIZE 4 40328e09f215SStefan Weinhuber 40338e09f215SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 40348e09f215SStefan Weinhuber struct dasd_block *block, 40358e09f215SStefan Weinhuber struct request *req) 40368e09f215SStefan Weinhuber { 40378e09f215SStefan Weinhuber struct dasd_eckd_private *private; 40388e09f215SStefan Weinhuber struct dasd_device *startdev; 40398e09f215SStefan Weinhuber unsigned long flags; 40408e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 40418e09f215SStefan Weinhuber 40428e09f215SStefan Weinhuber startdev = dasd_alias_get_start_dev(base); 40438e09f215SStefan Weinhuber if (!startdev) 40448e09f215SStefan Weinhuber startdev = base; 4045543691a4SSebastian Ott private = startdev->private; 40468e09f215SStefan Weinhuber if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 40478e09f215SStefan Weinhuber return ERR_PTR(-EBUSY); 40488e09f215SStefan Weinhuber 40498e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 40508e09f215SStefan Weinhuber private->count++; 4051e4dbb0f2SStefan Haberland if ((base->features & DASD_FEATURE_USERAW)) 4052bbc7f7eaSJan Höppner cqr = dasd_eckd_build_cp_raw(startdev, block, req); 4053e4dbb0f2SStefan Haberland else 40548e09f215SStefan Weinhuber cqr = dasd_eckd_build_cp(startdev, block, req); 40558e09f215SStefan Weinhuber if (IS_ERR(cqr)) 40568e09f215SStefan Weinhuber private->count--; 40578e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 40588e09f215SStefan Weinhuber return cqr; 40598e09f215SStefan Weinhuber } 40608e09f215SStefan Weinhuber 40618e09f215SStefan Weinhuber static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 40628e09f215SStefan Weinhuber struct request *req) 40638e09f215SStefan Weinhuber { 40648e09f215SStefan Weinhuber struct dasd_eckd_private *private; 40658e09f215SStefan Weinhuber unsigned long flags; 40668e09f215SStefan Weinhuber 40678e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 4068543691a4SSebastian Ott private = cqr->memdev->private; 40698e09f215SStefan Weinhuber private->count--; 40708e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 40718e09f215SStefan Weinhuber return dasd_eckd_free_cp(cqr, req); 40728e09f215SStefan Weinhuber } 40738e09f215SStefan Weinhuber 40741da177e4SLinus Torvalds static int 40751da177e4SLinus Torvalds dasd_eckd_fill_info(struct dasd_device * device, 40761da177e4SLinus Torvalds struct dasd_information2_t * info) 40771da177e4SLinus Torvalds { 4078543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 40791da177e4SLinus Torvalds 40801da177e4SLinus Torvalds info->label_block = 2; 40811da177e4SLinus Torvalds info->FBA_layout = private->uses_cdl ? 0 : 1; 40821da177e4SLinus Torvalds info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 4083543691a4SSebastian Ott info->characteristics_size = sizeof(private->rdc_data); 40841da177e4SLinus Torvalds memcpy(info->characteristics, &private->rdc_data, 4085543691a4SSebastian Ott sizeof(private->rdc_data)); 40864abb08c2SStefan Weinhuber info->confdata_size = min((unsigned long)private->conf_len, 40874abb08c2SStefan Weinhuber sizeof(info->configuration_data)); 40884abb08c2SStefan Weinhuber memcpy(info->configuration_data, private->conf_data, 40894abb08c2SStefan Weinhuber info->confdata_size); 40901da177e4SLinus Torvalds return 0; 40911da177e4SLinus Torvalds } 40921da177e4SLinus Torvalds 40931da177e4SLinus Torvalds /* 40941da177e4SLinus Torvalds * SECTION: ioctl functions for eckd devices. 40951da177e4SLinus Torvalds */ 40961da177e4SLinus Torvalds 40971da177e4SLinus Torvalds /* 40981da177e4SLinus Torvalds * Release device ioctl. 40991da177e4SLinus Torvalds * Buils a channel programm to releases a prior reserved 41001da177e4SLinus Torvalds * (see dasd_eckd_reserve) device. 41011da177e4SLinus Torvalds */ 41021da177e4SLinus Torvalds static int 41031107ccfbSChristoph Hellwig dasd_eckd_release(struct dasd_device *device) 41041da177e4SLinus Torvalds { 41051da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 41061da177e4SLinus Torvalds int rc; 4107f3eb5384SStefan Weinhuber struct ccw1 *ccw; 4108f932bceaSStefan Weinhuber int useglobal; 41091da177e4SLinus Torvalds 41101da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 41111da177e4SLinus Torvalds return -EACCES; 41121da177e4SLinus Torvalds 4113f932bceaSStefan Weinhuber useglobal = 0; 4114c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); 41151da177e4SLinus Torvalds if (IS_ERR(cqr)) { 4116f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 4117f932bceaSStefan Weinhuber useglobal = 1; 4118f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 4119f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 4120f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 4121f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 4122f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 4123f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 4124f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 41251da177e4SLinus Torvalds } 4126f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 4127f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RELEASE; 4128f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4129f3eb5384SStefan Weinhuber ccw->count = 32; 4130f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 41318e09f215SStefan Weinhuber cqr->startdev = device; 41328e09f215SStefan Weinhuber cqr->memdev = device; 41331da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 41341c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4135336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 41361da177e4SLinus Torvalds cqr->expires = 2 * HZ; 41371aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 41381da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 41391da177e4SLinus Torvalds 41401da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 41415a27e60dSStefan Weinhuber if (!rc) 41425a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 41431da177e4SLinus Torvalds 4144f932bceaSStefan Weinhuber if (useglobal) 4145f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 4146f932bceaSStefan Weinhuber else 41478e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 41481da177e4SLinus Torvalds return rc; 41491da177e4SLinus Torvalds } 41501da177e4SLinus Torvalds 41511da177e4SLinus Torvalds /* 41521da177e4SLinus Torvalds * Reserve device ioctl. 41531da177e4SLinus Torvalds * Options are set to 'synchronous wait for interrupt' and 41541da177e4SLinus Torvalds * 'timeout the request'. This leads to a terminate IO if 41551da177e4SLinus Torvalds * the interrupt is outstanding for a certain time. 41561da177e4SLinus Torvalds */ 41571da177e4SLinus Torvalds static int 41581107ccfbSChristoph Hellwig dasd_eckd_reserve(struct dasd_device *device) 41591da177e4SLinus Torvalds { 41601da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 41611da177e4SLinus Torvalds int rc; 4162f3eb5384SStefan Weinhuber struct ccw1 *ccw; 4163f932bceaSStefan Weinhuber int useglobal; 41641da177e4SLinus Torvalds 41651da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 41661da177e4SLinus Torvalds return -EACCES; 41671da177e4SLinus Torvalds 4168f932bceaSStefan Weinhuber useglobal = 0; 4169c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); 41701da177e4SLinus Torvalds if (IS_ERR(cqr)) { 4171f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 4172f932bceaSStefan Weinhuber useglobal = 1; 4173f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 4174f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 4175f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 4176f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 4177f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 4178f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 4179f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 41801da177e4SLinus Torvalds } 4181f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 4182f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RESERVE; 4183f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4184f3eb5384SStefan Weinhuber ccw->count = 32; 4185f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 41868e09f215SStefan Weinhuber cqr->startdev = device; 41878e09f215SStefan Weinhuber cqr->memdev = device; 41881da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 41891c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4190336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 41911da177e4SLinus Torvalds cqr->expires = 2 * HZ; 41921aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 41931da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 41941da177e4SLinus Torvalds 41951da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 41965a27e60dSStefan Weinhuber if (!rc) 41975a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 41981da177e4SLinus Torvalds 4199f932bceaSStefan Weinhuber if (useglobal) 4200f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 4201f932bceaSStefan Weinhuber else 42028e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 42031da177e4SLinus Torvalds return rc; 42041da177e4SLinus Torvalds } 42051da177e4SLinus Torvalds 42061da177e4SLinus Torvalds /* 42071da177e4SLinus Torvalds * Steal lock ioctl - unconditional reserve device. 42081da177e4SLinus Torvalds * Buils a channel programm to break a device's reservation. 42091da177e4SLinus Torvalds * (unconditional reserve) 42101da177e4SLinus Torvalds */ 42111da177e4SLinus Torvalds static int 42121107ccfbSChristoph Hellwig dasd_eckd_steal_lock(struct dasd_device *device) 42131da177e4SLinus Torvalds { 42141da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 42151da177e4SLinus Torvalds int rc; 4216f3eb5384SStefan Weinhuber struct ccw1 *ccw; 4217f932bceaSStefan Weinhuber int useglobal; 42181da177e4SLinus Torvalds 42191da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 42201da177e4SLinus Torvalds return -EACCES; 42211da177e4SLinus Torvalds 4222f932bceaSStefan Weinhuber useglobal = 0; 4223c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); 42241da177e4SLinus Torvalds if (IS_ERR(cqr)) { 4225f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 4226f932bceaSStefan Weinhuber useglobal = 1; 4227f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 4228f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 4229f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 4230f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 4231f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 4232f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 4233f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 42341da177e4SLinus Torvalds } 4235f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 4236f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SLCK; 4237f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4238f3eb5384SStefan Weinhuber ccw->count = 32; 4239f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 42408e09f215SStefan Weinhuber cqr->startdev = device; 42418e09f215SStefan Weinhuber cqr->memdev = device; 42421da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 42431c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4244336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 42451da177e4SLinus Torvalds cqr->expires = 2 * HZ; 42461aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 42471da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 42481da177e4SLinus Torvalds 42491da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 42505a27e60dSStefan Weinhuber if (!rc) 42515a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 42521da177e4SLinus Torvalds 4253f932bceaSStefan Weinhuber if (useglobal) 4254f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 4255f932bceaSStefan Weinhuber else 42568e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 42571da177e4SLinus Torvalds return rc; 42581da177e4SLinus Torvalds } 42591da177e4SLinus Torvalds 42601da177e4SLinus Torvalds /* 4261196339f1SStefan Weinhuber * SNID - Sense Path Group ID 4262196339f1SStefan Weinhuber * This ioctl may be used in situations where I/O is stalled due to 4263196339f1SStefan Weinhuber * a reserve, so if the normal dasd_smalloc_request fails, we use the 4264196339f1SStefan Weinhuber * preallocated dasd_reserve_req. 4265196339f1SStefan Weinhuber */ 4266196339f1SStefan Weinhuber static int dasd_eckd_snid(struct dasd_device *device, 4267196339f1SStefan Weinhuber void __user *argp) 4268196339f1SStefan Weinhuber { 4269196339f1SStefan Weinhuber struct dasd_ccw_req *cqr; 4270196339f1SStefan Weinhuber int rc; 4271196339f1SStefan Weinhuber struct ccw1 *ccw; 4272196339f1SStefan Weinhuber int useglobal; 4273196339f1SStefan Weinhuber struct dasd_snid_ioctl_data usrparm; 4274196339f1SStefan Weinhuber 4275196339f1SStefan Weinhuber if (!capable(CAP_SYS_ADMIN)) 4276196339f1SStefan Weinhuber return -EACCES; 4277196339f1SStefan Weinhuber 4278196339f1SStefan Weinhuber if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 4279196339f1SStefan Weinhuber return -EFAULT; 4280196339f1SStefan Weinhuber 4281196339f1SStefan Weinhuber useglobal = 0; 4282196339f1SStefan Weinhuber cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 4283c5205f2fSSebastian Ott sizeof(struct dasd_snid_data), device, 4284c5205f2fSSebastian Ott NULL); 4285196339f1SStefan Weinhuber if (IS_ERR(cqr)) { 4286196339f1SStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 4287196339f1SStefan Weinhuber useglobal = 1; 4288196339f1SStefan Weinhuber cqr = &dasd_reserve_req->cqr; 4289196339f1SStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 4290196339f1SStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 4291196339f1SStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 4292196339f1SStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 4293196339f1SStefan Weinhuber cqr->data = &dasd_reserve_req->data; 4294196339f1SStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 4295196339f1SStefan Weinhuber } 4296196339f1SStefan Weinhuber ccw = cqr->cpaddr; 4297196339f1SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SNID; 4298196339f1SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4299196339f1SStefan Weinhuber ccw->count = 12; 4300196339f1SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 4301196339f1SStefan Weinhuber cqr->startdev = device; 4302196339f1SStefan Weinhuber cqr->memdev = device; 4303196339f1SStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 4304196339f1SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 43055a27e60dSStefan Weinhuber set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 4306196339f1SStefan Weinhuber cqr->retries = 5; 4307196339f1SStefan Weinhuber cqr->expires = 10 * HZ; 43081aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 4309196339f1SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 4310196339f1SStefan Weinhuber cqr->lpm = usrparm.path_mask; 4311196339f1SStefan Weinhuber 4312196339f1SStefan Weinhuber rc = dasd_sleep_on_immediatly(cqr); 4313196339f1SStefan Weinhuber /* verify that I/O processing didn't modify the path mask */ 4314196339f1SStefan Weinhuber if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) 4315196339f1SStefan Weinhuber rc = -EIO; 4316196339f1SStefan Weinhuber if (!rc) { 4317196339f1SStefan Weinhuber usrparm.data = *((struct dasd_snid_data *)cqr->data); 4318196339f1SStefan Weinhuber if (copy_to_user(argp, &usrparm, sizeof(usrparm))) 4319196339f1SStefan Weinhuber rc = -EFAULT; 4320196339f1SStefan Weinhuber } 4321196339f1SStefan Weinhuber 4322196339f1SStefan Weinhuber if (useglobal) 4323196339f1SStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 4324196339f1SStefan Weinhuber else 4325196339f1SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 4326196339f1SStefan Weinhuber return rc; 4327196339f1SStefan Weinhuber } 4328196339f1SStefan Weinhuber 4329196339f1SStefan Weinhuber /* 43301da177e4SLinus Torvalds * Read performance statistics 43311da177e4SLinus Torvalds */ 43321da177e4SLinus Torvalds static int 43331107ccfbSChristoph Hellwig dasd_eckd_performance(struct dasd_device *device, void __user *argp) 43341da177e4SLinus Torvalds { 43351da177e4SLinus Torvalds struct dasd_psf_prssd_data *prssdp; 43361da177e4SLinus Torvalds struct dasd_rssd_perf_stats_t *stats; 43371da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 43381da177e4SLinus Torvalds struct ccw1 *ccw; 43391da177e4SLinus Torvalds int rc; 43401da177e4SLinus Torvalds 434168b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 43421da177e4SLinus Torvalds (sizeof(struct dasd_psf_prssd_data) + 43431da177e4SLinus Torvalds sizeof(struct dasd_rssd_perf_stats_t)), 4344c5205f2fSSebastian Ott device, NULL); 43451da177e4SLinus Torvalds if (IS_ERR(cqr)) { 4346fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 43471da177e4SLinus Torvalds "Could not allocate initialization request"); 43481da177e4SLinus Torvalds return PTR_ERR(cqr); 43491da177e4SLinus Torvalds } 43508e09f215SStefan Weinhuber cqr->startdev = device; 43518e09f215SStefan Weinhuber cqr->memdev = device; 43521da177e4SLinus Torvalds cqr->retries = 0; 4353eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 43541da177e4SLinus Torvalds cqr->expires = 10 * HZ; 43551da177e4SLinus Torvalds 43561da177e4SLinus Torvalds /* Prepare for Read Subsystem Data */ 43571da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 43581da177e4SLinus Torvalds memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 43591da177e4SLinus Torvalds prssdp->order = PSF_ORDER_PRSSD; 43605d67d164SJoe Perches prssdp->suborder = 0x01; /* Performance Statistics */ 43611da177e4SLinus Torvalds prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 43621da177e4SLinus Torvalds 43631da177e4SLinus Torvalds ccw = cqr->cpaddr; 43641da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_PSF; 43651da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_psf_prssd_data); 43661da177e4SLinus Torvalds ccw->flags |= CCW_FLAG_CC; 43671da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) prssdp; 43681da177e4SLinus Torvalds 43691da177e4SLinus Torvalds /* Read Subsystem Data - Performance Statistics */ 43701da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 43711da177e4SLinus Torvalds memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 43721da177e4SLinus Torvalds 43731da177e4SLinus Torvalds ccw++; 43741da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_RSSD; 43751da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 43761da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) stats; 43771da177e4SLinus Torvalds 43781aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 43791da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 43801da177e4SLinus Torvalds rc = dasd_sleep_on(cqr); 43811da177e4SLinus Torvalds if (rc == 0) { 43821da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 43831da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 43841107ccfbSChristoph Hellwig if (copy_to_user(argp, stats, 43851107ccfbSChristoph Hellwig sizeof(struct dasd_rssd_perf_stats_t))) 43861107ccfbSChristoph Hellwig rc = -EFAULT; 43871da177e4SLinus Torvalds } 43888e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 43891da177e4SLinus Torvalds return rc; 43901da177e4SLinus Torvalds } 43911da177e4SLinus Torvalds 43921da177e4SLinus Torvalds /* 43931da177e4SLinus Torvalds * Get attributes (cache operations) 43941da177e4SLinus Torvalds * Returnes the cache attributes used in Define Extend (DE). 43951da177e4SLinus Torvalds */ 43961da177e4SLinus Torvalds static int 43971107ccfbSChristoph Hellwig dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 43981da177e4SLinus Torvalds { 4399543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 44001107ccfbSChristoph Hellwig struct attrib_data_t attrib = private->attrib; 44011da177e4SLinus Torvalds int rc; 44021da177e4SLinus Torvalds 44031da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 44041da177e4SLinus Torvalds return -EACCES; 44051107ccfbSChristoph Hellwig if (!argp) 44061da177e4SLinus Torvalds return -EINVAL; 44071da177e4SLinus Torvalds 44081107ccfbSChristoph Hellwig rc = 0; 44091107ccfbSChristoph Hellwig if (copy_to_user(argp, (long *) &attrib, 44101107ccfbSChristoph Hellwig sizeof(struct attrib_data_t))) 44111107ccfbSChristoph Hellwig rc = -EFAULT; 44121da177e4SLinus Torvalds 44131da177e4SLinus Torvalds return rc; 44141da177e4SLinus Torvalds } 44151da177e4SLinus Torvalds 44161da177e4SLinus Torvalds /* 44171da177e4SLinus Torvalds * Set attributes (cache operations) 44181da177e4SLinus Torvalds * Stores the attributes for cache operation to be used in Define Extend (DE). 44191da177e4SLinus Torvalds */ 44201da177e4SLinus Torvalds static int 44211107ccfbSChristoph Hellwig dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 44221da177e4SLinus Torvalds { 4423543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 44241da177e4SLinus Torvalds struct attrib_data_t attrib; 44251da177e4SLinus Torvalds 44261da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 44271da177e4SLinus Torvalds return -EACCES; 44281107ccfbSChristoph Hellwig if (!argp) 44291da177e4SLinus Torvalds return -EINVAL; 44301da177e4SLinus Torvalds 44311107ccfbSChristoph Hellwig if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 44321da177e4SLinus Torvalds return -EFAULT; 44331da177e4SLinus Torvalds private->attrib = attrib; 44341da177e4SLinus Torvalds 4435fc19f381SStefan Haberland dev_info(&device->cdev->dev, 4436fc19f381SStefan Haberland "The DASD cache mode was set to %x (%i cylinder prestage)\n", 44371da177e4SLinus Torvalds private->attrib.operation, private->attrib.nr_cyl); 44381da177e4SLinus Torvalds return 0; 44391da177e4SLinus Torvalds } 44401da177e4SLinus Torvalds 4441ab1d848fSNigel Hislop /* 4442ab1d848fSNigel Hislop * Issue syscall I/O to EMC Symmetrix array. 4443ab1d848fSNigel Hislop * CCWs are PSF and RSSD 4444ab1d848fSNigel Hislop */ 4445ab1d848fSNigel Hislop static int dasd_symm_io(struct dasd_device *device, void __user *argp) 4446ab1d848fSNigel Hislop { 4447ab1d848fSNigel Hislop struct dasd_symmio_parms usrparm; 4448ab1d848fSNigel Hislop char *psf_data, *rssd_result; 4449ab1d848fSNigel Hislop struct dasd_ccw_req *cqr; 4450ab1d848fSNigel Hislop struct ccw1 *ccw; 445152898025SNigel Hislop char psf0, psf1; 4452ab1d848fSNigel Hislop int rc; 4453ab1d848fSNigel Hislop 445452898025SNigel Hislop if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) 445552898025SNigel Hislop return -EACCES; 445652898025SNigel Hislop psf0 = psf1 = 0; 445752898025SNigel Hislop 4458ab1d848fSNigel Hislop /* Copy parms from caller */ 4459ab1d848fSNigel Hislop rc = -EFAULT; 4460ab1d848fSNigel Hislop if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 4461ab1d848fSNigel Hislop goto out; 446292d62891SHeiko Carstens if (is_compat_task()) { 4463ab1d848fSNigel Hislop /* Make sure pointers are sane even on 31 bit. */ 4464ab1d848fSNigel Hislop rc = -EINVAL; 4465f8b06859SHeiko Carstens if ((usrparm.psf_data >> 32) != 0) 4466ab1d848fSNigel Hislop goto out; 4467f8b06859SHeiko Carstens if ((usrparm.rssd_result >> 32) != 0) 4468f8b06859SHeiko Carstens goto out; 4469f8b06859SHeiko Carstens usrparm.psf_data &= 0x7fffffffULL; 4470f8b06859SHeiko Carstens usrparm.rssd_result &= 0x7fffffffULL; 4471ab1d848fSNigel Hislop } 44724a8ef699SStefan Haberland /* at least 2 bytes are accessed and should be allocated */ 44734a8ef699SStefan Haberland if (usrparm.psf_data_len < 2) { 44744a8ef699SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, 44754a8ef699SStefan Haberland "Symmetrix ioctl invalid data length %d", 44764a8ef699SStefan Haberland usrparm.psf_data_len); 44774a8ef699SStefan Haberland rc = -EINVAL; 44784a8ef699SStefan Haberland goto out; 44794a8ef699SStefan Haberland } 4480ab1d848fSNigel Hislop /* alloc I/O data area */ 4481ab1d848fSNigel Hislop psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 4482ab1d848fSNigel Hislop rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 4483ab1d848fSNigel Hislop if (!psf_data || !rssd_result) { 4484ab1d848fSNigel Hislop rc = -ENOMEM; 4485ab1d848fSNigel Hislop goto out_free; 4486ab1d848fSNigel Hislop } 4487ab1d848fSNigel Hislop 4488ab1d848fSNigel Hislop /* get syscall header from user space */ 4489ab1d848fSNigel Hislop rc = -EFAULT; 4490ab1d848fSNigel Hislop if (copy_from_user(psf_data, 4491ab1d848fSNigel Hislop (void __user *)(unsigned long) usrparm.psf_data, 4492ab1d848fSNigel Hislop usrparm.psf_data_len)) 4493ab1d848fSNigel Hislop goto out_free; 449452898025SNigel Hislop psf0 = psf_data[0]; 449552898025SNigel Hislop psf1 = psf_data[1]; 4496ab1d848fSNigel Hislop 4497ab1d848fSNigel Hislop /* setup CCWs for PSF + RSSD */ 4498c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2, 0, device, NULL); 4499ab1d848fSNigel Hislop if (IS_ERR(cqr)) { 4500fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 4501ab1d848fSNigel Hislop "Could not allocate initialization request"); 4502ab1d848fSNigel Hislop rc = PTR_ERR(cqr); 4503ab1d848fSNigel Hislop goto out_free; 4504ab1d848fSNigel Hislop } 4505ab1d848fSNigel Hislop 4506ab1d848fSNigel Hislop cqr->startdev = device; 4507ab1d848fSNigel Hislop cqr->memdev = device; 4508ab1d848fSNigel Hislop cqr->retries = 3; 4509ab1d848fSNigel Hislop cqr->expires = 10 * HZ; 45101aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 4511ab1d848fSNigel Hislop cqr->status = DASD_CQR_FILLED; 4512ab1d848fSNigel Hislop 4513ab1d848fSNigel Hislop /* Build the ccws */ 4514ab1d848fSNigel Hislop ccw = cqr->cpaddr; 4515ab1d848fSNigel Hislop 4516ab1d848fSNigel Hislop /* PSF ccw */ 4517ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_PSF; 4518ab1d848fSNigel Hislop ccw->count = usrparm.psf_data_len; 4519ab1d848fSNigel Hislop ccw->flags |= CCW_FLAG_CC; 4520ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) psf_data; 4521ab1d848fSNigel Hislop 4522ab1d848fSNigel Hislop ccw++; 4523ab1d848fSNigel Hislop 4524ab1d848fSNigel Hislop /* RSSD ccw */ 4525ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_RSSD; 4526ab1d848fSNigel Hislop ccw->count = usrparm.rssd_result_len; 4527ab1d848fSNigel Hislop ccw->flags = CCW_FLAG_SLI ; 4528ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) rssd_result; 4529ab1d848fSNigel Hislop 4530ab1d848fSNigel Hislop rc = dasd_sleep_on(cqr); 4531ab1d848fSNigel Hislop if (rc) 4532ab1d848fSNigel Hislop goto out_sfree; 4533ab1d848fSNigel Hislop 4534ab1d848fSNigel Hislop rc = -EFAULT; 4535ab1d848fSNigel Hislop if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 4536ab1d848fSNigel Hislop rssd_result, usrparm.rssd_result_len)) 4537ab1d848fSNigel Hislop goto out_sfree; 4538ab1d848fSNigel Hislop rc = 0; 4539ab1d848fSNigel Hislop 4540ab1d848fSNigel Hislop out_sfree: 4541ab1d848fSNigel Hislop dasd_sfree_request(cqr, cqr->memdev); 4542ab1d848fSNigel Hislop out_free: 4543ab1d848fSNigel Hislop kfree(rssd_result); 4544ab1d848fSNigel Hislop kfree(psf_data); 4545ab1d848fSNigel Hislop out: 454652898025SNigel Hislop DBF_DEV_EVENT(DBF_WARNING, device, 454752898025SNigel Hislop "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", 454852898025SNigel Hislop (int) psf0, (int) psf1, rc); 4549ab1d848fSNigel Hislop return rc; 4550ab1d848fSNigel Hislop } 4551ab1d848fSNigel Hislop 45521107ccfbSChristoph Hellwig static int 45538e09f215SStefan Weinhuber dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 45541107ccfbSChristoph Hellwig { 45558e09f215SStefan Weinhuber struct dasd_device *device = block->base; 45568e09f215SStefan Weinhuber 45571107ccfbSChristoph Hellwig switch (cmd) { 45581107ccfbSChristoph Hellwig case BIODASDGATTR: 45591107ccfbSChristoph Hellwig return dasd_eckd_get_attrib(device, argp); 45601107ccfbSChristoph Hellwig case BIODASDSATTR: 45611107ccfbSChristoph Hellwig return dasd_eckd_set_attrib(device, argp); 45621107ccfbSChristoph Hellwig case BIODASDPSRD: 45631107ccfbSChristoph Hellwig return dasd_eckd_performance(device, argp); 45641107ccfbSChristoph Hellwig case BIODASDRLSE: 45651107ccfbSChristoph Hellwig return dasd_eckd_release(device); 45661107ccfbSChristoph Hellwig case BIODASDRSRV: 45671107ccfbSChristoph Hellwig return dasd_eckd_reserve(device); 45681107ccfbSChristoph Hellwig case BIODASDSLCK: 45691107ccfbSChristoph Hellwig return dasd_eckd_steal_lock(device); 4570196339f1SStefan Weinhuber case BIODASDSNID: 4571196339f1SStefan Weinhuber return dasd_eckd_snid(device, argp); 4572ab1d848fSNigel Hislop case BIODASDSYMMIO: 4573ab1d848fSNigel Hislop return dasd_symm_io(device, argp); 45741107ccfbSChristoph Hellwig default: 45756b79d14eSHeiko Carstens return -ENOTTY; 45761107ccfbSChristoph Hellwig } 45771107ccfbSChristoph Hellwig } 45781107ccfbSChristoph Hellwig 45791da177e4SLinus Torvalds /* 4580445b5b49SHorst Hummel * Dump the range of CCWs into 'page' buffer 4581445b5b49SHorst Hummel * and return number of printed chars. 4582445b5b49SHorst Hummel */ 45834d284cacSHeiko Carstens static int 4584445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 4585445b5b49SHorst Hummel { 4586445b5b49SHorst Hummel int len, count; 4587445b5b49SHorst Hummel char *datap; 4588445b5b49SHorst Hummel 4589445b5b49SHorst Hummel len = 0; 4590445b5b49SHorst Hummel while (from <= to) { 4591773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4592445b5b49SHorst Hummel " CCW %p: %08X %08X DAT:", 4593445b5b49SHorst Hummel from, ((int *) from)[0], ((int *) from)[1]); 4594445b5b49SHorst Hummel 4595445b5b49SHorst Hummel /* get pointer to data (consider IDALs) */ 4596445b5b49SHorst Hummel if (from->flags & CCW_FLAG_IDA) 4597445b5b49SHorst Hummel datap = (char *) *((addr_t *) (addr_t) from->cda); 4598445b5b49SHorst Hummel else 4599445b5b49SHorst Hummel datap = (char *) ((addr_t) from->cda); 4600445b5b49SHorst Hummel 4601445b5b49SHorst Hummel /* dump data (max 32 bytes) */ 4602445b5b49SHorst Hummel for (count = 0; count < from->count && count < 32; count++) { 4603445b5b49SHorst Hummel if (count % 8 == 0) len += sprintf(page + len, " "); 4604445b5b49SHorst Hummel if (count % 4 == 0) len += sprintf(page + len, " "); 4605445b5b49SHorst Hummel len += sprintf(page + len, "%02x", datap[count]); 4606445b5b49SHorst Hummel } 4607445b5b49SHorst Hummel len += sprintf(page + len, "\n"); 4608445b5b49SHorst Hummel from++; 4609445b5b49SHorst Hummel } 4610445b5b49SHorst Hummel return len; 4611445b5b49SHorst Hummel } 4612445b5b49SHorst Hummel 4613fc19f381SStefan Haberland static void 4614aeec92caSStefan Haberland dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 4615aeec92caSStefan Haberland char *reason) 4616fc19f381SStefan Haberland { 4617fc19f381SStefan Haberland u64 *sense; 4618a5a0061fSStefan Weinhuber u64 *stat; 4619fc19f381SStefan Haberland 4620aeec92caSStefan Haberland sense = (u64 *) dasd_get_sense(irb); 4621a5a0061fSStefan Weinhuber stat = (u64 *) &irb->scsw; 4622fc19f381SStefan Haberland if (sense) { 4623a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " 4624a5a0061fSStefan Weinhuber "%016llx %016llx %016llx %016llx", 4625a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 4626ed3640b2SStefan Haberland sense[0], sense[1], sense[2], sense[3]); 4627fc19f381SStefan Haberland } else { 4628a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", 4629a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 4630a5a0061fSStefan Weinhuber "NO VALID SENSE"); 4631fc19f381SStefan Haberland } 4632fc19f381SStefan Haberland } 4633fc19f381SStefan Haberland 4634445b5b49SHorst Hummel /* 46351da177e4SLinus Torvalds * Print sense data and related channel program. 46361da177e4SLinus Torvalds * Parts are printed because printk buffer is only 1024 bytes. 46371da177e4SLinus Torvalds */ 4638f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 46398e09f215SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 46401da177e4SLinus Torvalds { 46411da177e4SLinus Torvalds char *page; 4642445b5b49SHorst Hummel struct ccw1 *first, *last, *fail, *from, *to; 4643445b5b49SHorst Hummel int len, sl, sct; 46441da177e4SLinus Torvalds 46451da177e4SLinus Torvalds page = (char *) get_zeroed_page(GFP_ATOMIC); 46461da177e4SLinus Torvalds if (page == NULL) { 4647fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 4648fc19f381SStefan Haberland "No memory to dump sense data\n"); 46491da177e4SLinus Torvalds return; 46501da177e4SLinus Torvalds } 4651445b5b49SHorst Hummel /* dump the sense data */ 4652773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 46531da177e4SLinus Torvalds " I/O status report for device %s:\n", 46542a0217d5SKay Sievers dev_name(&device->cdev->dev)); 4655773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4656a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 4657a5a0061fSStefan Weinhuber "CS:%02X RC:%d\n", 4658a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 4659a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 4660a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 4661a5a0061fSStefan Weinhuber req ? req->intrc : 0); 4662773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 46631da177e4SLinus Torvalds " device %s: Failing CCW: %p\n", 46642a0217d5SKay Sievers dev_name(&device->cdev->dev), 466523d805b6SPeter Oberparleiter (void *) (addr_t) irb->scsw.cmd.cpa); 46661da177e4SLinus Torvalds if (irb->esw.esw0.erw.cons) { 46671da177e4SLinus Torvalds for (sl = 0; sl < 4; sl++) { 4668773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 46691da177e4SLinus Torvalds " Sense(hex) %2d-%2d:", 46701da177e4SLinus Torvalds (8 * sl), ((8 * sl) + 7)); 46711da177e4SLinus Torvalds 46721da177e4SLinus Torvalds for (sct = 0; sct < 8; sct++) { 46731da177e4SLinus Torvalds len += sprintf(page + len, " %02x", 46741da177e4SLinus Torvalds irb->ecw[8 * sl + sct]); 46751da177e4SLinus Torvalds } 46761da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 46771da177e4SLinus Torvalds } 46781da177e4SLinus Torvalds 46791da177e4SLinus Torvalds if (irb->ecw[27] & DASD_SENSE_BIT_0) { 46801da177e4SLinus Torvalds /* 24 Byte Sense Data */ 4681773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 46821da177e4SLinus Torvalds " 24 Byte: %x MSG %x, " 46831da177e4SLinus Torvalds "%s MSGb to SYSOP\n", 46841da177e4SLinus Torvalds irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 46851da177e4SLinus Torvalds irb->ecw[1] & 0x10 ? "" : "no"); 46861da177e4SLinus Torvalds } else { 46871da177e4SLinus Torvalds /* 32 Byte Sense Data */ 4688773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 46891da177e4SLinus Torvalds " 32 Byte: Format: %x " 46901da177e4SLinus Torvalds "Exception class %x\n", 46911da177e4SLinus Torvalds irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 46921da177e4SLinus Torvalds } 46931da177e4SLinus Torvalds } else { 4694773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 46951da177e4SLinus Torvalds " SORRY - NO VALID SENSE AVAILABLE\n"); 46961da177e4SLinus Torvalds } 4697773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 46981da177e4SLinus Torvalds 46998e09f215SStefan Weinhuber if (req) { 47008e09f215SStefan Weinhuber /* req == NULL for unsolicited interrupts */ 4701445b5b49SHorst Hummel /* dump the Channel Program (max 140 Bytes per line) */ 4702445b5b49SHorst Hummel /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 4703445b5b49SHorst Hummel first = req->cpaddr; 4704445b5b49SHorst Hummel for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 4705445b5b49SHorst Hummel to = min(first + 6, last); 4706773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 47071da177e4SLinus Torvalds " Related CP in req: %p\n", req); 4708445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(first, to, page + len); 4709773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 47101da177e4SLinus Torvalds 4711445b5b49SHorst Hummel /* print failing CCW area (maximum 4) */ 4712445b5b49SHorst Hummel /* scsw->cda is either valid or zero */ 47131da177e4SLinus Torvalds len = 0; 4714445b5b49SHorst Hummel from = ++to; 471523d805b6SPeter Oberparleiter fail = (struct ccw1 *)(addr_t) 471623d805b6SPeter Oberparleiter irb->scsw.cmd.cpa; /* failing CCW */ 4717445b5b49SHorst Hummel if (from < fail - 2) { 4718445b5b49SHorst Hummel from = fail - 2; /* there is a gap - print header */ 4719773bab4aSSebastian Ott len += sprintf(page, PRINTK_HEADER "......\n"); 47201da177e4SLinus Torvalds } 4721445b5b49SHorst Hummel to = min(fail + 1, last); 4722445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, to, page + len); 47231da177e4SLinus Torvalds 4724445b5b49SHorst Hummel /* print last CCWs (maximum 2) */ 4725445b5b49SHorst Hummel from = max(from, ++to); 4726445b5b49SHorst Hummel if (from < last - 1) { 4727445b5b49SHorst Hummel from = last - 1; /* there is a gap - print header */ 4728773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER "......\n"); 47291da177e4SLinus Torvalds } 4730445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, last, page + len); 47311da177e4SLinus Torvalds if (len > 0) 4732773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 47338e09f215SStefan Weinhuber } 47341da177e4SLinus Torvalds free_page((unsigned long) page); 47351da177e4SLinus Torvalds } 47361da177e4SLinus Torvalds 4737f3eb5384SStefan Weinhuber 4738f3eb5384SStefan Weinhuber /* 4739f3eb5384SStefan Weinhuber * Print sense data from a tcw. 4740f3eb5384SStefan Weinhuber */ 4741f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 4742f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 4743f3eb5384SStefan Weinhuber { 4744f3eb5384SStefan Weinhuber char *page; 4745f3eb5384SStefan Weinhuber int len, sl, sct, residual; 4746f3eb5384SStefan Weinhuber struct tsb *tsb; 4747ef19298bSStefan Weinhuber u8 *sense, *rcq; 4748f3eb5384SStefan Weinhuber 4749f3eb5384SStefan Weinhuber page = (char *) get_zeroed_page(GFP_ATOMIC); 4750f3eb5384SStefan Weinhuber if (page == NULL) { 4751fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, " %s", 4752f3eb5384SStefan Weinhuber "No memory to dump sense data"); 4753f3eb5384SStefan Weinhuber return; 4754f3eb5384SStefan Weinhuber } 4755f3eb5384SStefan Weinhuber /* dump the sense data */ 4756773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 4757f3eb5384SStefan Weinhuber " I/O status report for device %s:\n", 4758f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev)); 4759773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4760a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 4761a5a0061fSStefan Weinhuber "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", 4762a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 4763a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 4764a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 4765a521b048SStefan Haberland irb->scsw.tm.fcxs, 4766a521b048SStefan Haberland (irb->scsw.tm.ifob << 7) | irb->scsw.tm.sesq, 4767a5a0061fSStefan Weinhuber req ? req->intrc : 0); 4768773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4769f3eb5384SStefan Weinhuber " device %s: Failing TCW: %p\n", 4770f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev), 4771f3eb5384SStefan Weinhuber (void *) (addr_t) irb->scsw.tm.tcw); 4772f3eb5384SStefan Weinhuber 4773f3eb5384SStefan Weinhuber tsb = NULL; 4774f3eb5384SStefan Weinhuber sense = NULL; 4775a5a0061fSStefan Weinhuber if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) 4776f3eb5384SStefan Weinhuber tsb = tcw_get_tsb( 4777f3eb5384SStefan Weinhuber (struct tcw *)(unsigned long)irb->scsw.tm.tcw); 4778f3eb5384SStefan Weinhuber 4779b8fde722SStefan Haberland if (tsb) { 4780773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4781f3eb5384SStefan Weinhuber " tsb->length %d\n", tsb->length); 4782773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4783f3eb5384SStefan Weinhuber " tsb->flags %x\n", tsb->flags); 4784773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4785f3eb5384SStefan Weinhuber " tsb->dcw_offset %d\n", tsb->dcw_offset); 4786773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4787f3eb5384SStefan Weinhuber " tsb->count %d\n", tsb->count); 4788f3eb5384SStefan Weinhuber residual = tsb->count - 28; 4789773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4790f3eb5384SStefan Weinhuber " residual %d\n", residual); 4791f3eb5384SStefan Weinhuber 4792f3eb5384SStefan Weinhuber switch (tsb->flags & 0x07) { 4793f3eb5384SStefan Weinhuber case 1: /* tsa_iostat */ 4794773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4795f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_time %d\n", 4796f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_time); 4797773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4798f3eb5384SStefan Weinhuber " tsb->tsa.iostat.def_time %d\n", 4799f3eb5384SStefan Weinhuber tsb->tsa.iostat.def_time); 4800773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4801f3eb5384SStefan Weinhuber " tsb->tsa.iostat.queue_time %d\n", 4802f3eb5384SStefan Weinhuber tsb->tsa.iostat.queue_time); 4803773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4804f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_busy_time %d\n", 4805f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_busy_time); 4806773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4807f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_act_time %d\n", 4808f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_act_time); 4809f3eb5384SStefan Weinhuber sense = tsb->tsa.iostat.sense; 4810f3eb5384SStefan Weinhuber break; 4811f3eb5384SStefan Weinhuber case 2: /* ts_ddpc */ 4812773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4813f3eb5384SStefan Weinhuber " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); 4814ef19298bSStefan Weinhuber for (sl = 0; sl < 2; sl++) { 4815773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4816ef19298bSStefan Weinhuber " tsb->tsa.ddpc.rcq %2d-%2d: ", 4817ef19298bSStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 4818ef19298bSStefan Weinhuber rcq = tsb->tsa.ddpc.rcq; 4819f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 4820f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 4821ef19298bSStefan Weinhuber rcq[8 * sl + sct]); 4822f3eb5384SStefan Weinhuber } 4823f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 4824f3eb5384SStefan Weinhuber } 4825f3eb5384SStefan Weinhuber sense = tsb->tsa.ddpc.sense; 4826f3eb5384SStefan Weinhuber break; 4827f3eb5384SStefan Weinhuber case 3: /* tsa_intrg */ 4828773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 48298693b914SColin Ian King " tsb->tsa.intrg.: not supported yet\n"); 4830f3eb5384SStefan Weinhuber break; 4831f3eb5384SStefan Weinhuber } 4832f3eb5384SStefan Weinhuber 4833f3eb5384SStefan Weinhuber if (sense) { 4834f3eb5384SStefan Weinhuber for (sl = 0; sl < 4; sl++) { 4835773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4836f3eb5384SStefan Weinhuber " Sense(hex) %2d-%2d:", 4837f3eb5384SStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 4838f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 4839f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 4840f3eb5384SStefan Weinhuber sense[8 * sl + sct]); 4841f3eb5384SStefan Weinhuber } 4842f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 4843f3eb5384SStefan Weinhuber } 4844f3eb5384SStefan Weinhuber 4845f3eb5384SStefan Weinhuber if (sense[27] & DASD_SENSE_BIT_0) { 4846f3eb5384SStefan Weinhuber /* 24 Byte Sense Data */ 4847773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4848f3eb5384SStefan Weinhuber " 24 Byte: %x MSG %x, " 4849f3eb5384SStefan Weinhuber "%s MSGb to SYSOP\n", 4850f3eb5384SStefan Weinhuber sense[7] >> 4, sense[7] & 0x0f, 4851f3eb5384SStefan Weinhuber sense[1] & 0x10 ? "" : "no"); 4852f3eb5384SStefan Weinhuber } else { 4853f3eb5384SStefan Weinhuber /* 32 Byte Sense Data */ 4854773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4855f3eb5384SStefan Weinhuber " 32 Byte: Format: %x " 4856f3eb5384SStefan Weinhuber "Exception class %x\n", 4857f3eb5384SStefan Weinhuber sense[6] & 0x0f, sense[22] >> 4); 4858f3eb5384SStefan Weinhuber } 4859f3eb5384SStefan Weinhuber } else { 4860773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4861f3eb5384SStefan Weinhuber " SORRY - NO VALID SENSE AVAILABLE\n"); 4862f3eb5384SStefan Weinhuber } 4863f3eb5384SStefan Weinhuber } else { 4864773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4865f3eb5384SStefan Weinhuber " SORRY - NO TSB DATA AVAILABLE\n"); 4866f3eb5384SStefan Weinhuber } 4867773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 4868f3eb5384SStefan Weinhuber free_page((unsigned long) page); 4869f3eb5384SStefan Weinhuber } 4870f3eb5384SStefan Weinhuber 4871f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense(struct dasd_device *device, 4872f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 4873f3eb5384SStefan Weinhuber { 48748fd57520SJan Höppner u8 *sense = dasd_get_sense(irb); 48758fd57520SJan Höppner 48768fd57520SJan Höppner if (scsw_is_tm(&irb->scsw)) { 48778fd57520SJan Höppner /* 48788fd57520SJan Höppner * In some cases the 'File Protected' or 'Incorrect Length' 48798fd57520SJan Höppner * error might be expected and log messages shouldn't be written 48808fd57520SJan Höppner * then. Check if the according suppress bit is set. 48818fd57520SJan Höppner */ 48828fd57520SJan Höppner if (sense && (sense[1] & SNS1_FILE_PROTECTED) && 48838fd57520SJan Höppner test_bit(DASD_CQR_SUPPRESS_FP, &req->flags)) 48848fd57520SJan Höppner return; 48858fd57520SJan Höppner if (scsw_cstat(&irb->scsw) == 0x40 && 48868fd57520SJan Höppner test_bit(DASD_CQR_SUPPRESS_IL, &req->flags)) 48878fd57520SJan Höppner return; 48888fd57520SJan Höppner 4889f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_tcw(device, req, irb); 48908fd57520SJan Höppner } else { 48918fd57520SJan Höppner /* 4892ab24fbd3SStefan Haberland * In some cases the 'Command Reject' or 'No Record Found' 4893ab24fbd3SStefan Haberland * error might be expected and log messages shouldn't be 4894ab24fbd3SStefan Haberland * written then. Check if the according suppress bit is set. 48958fd57520SJan Höppner */ 4896ab24fbd3SStefan Haberland if (sense && sense[0] & SNS0_CMD_REJECT && 4897ab24fbd3SStefan Haberland test_bit(DASD_CQR_SUPPRESS_CR, &req->flags)) 4898ab24fbd3SStefan Haberland return; 4899ab24fbd3SStefan Haberland 49008fd57520SJan Höppner if (sense && sense[1] & SNS1_NO_REC_FOUND && 49018fd57520SJan Höppner test_bit(DASD_CQR_SUPPRESS_NRF, &req->flags)) 49028fd57520SJan Höppner return; 49038fd57520SJan Höppner 4904f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_ccw(device, req, irb); 4905f3eb5384SStefan Weinhuber } 49068fd57520SJan Höppner } 4907f3eb5384SStefan Weinhuber 4908501183f2SStefan Haberland static int dasd_eckd_pm_freeze(struct dasd_device *device) 4909d41dd122SStefan Haberland { 4910d41dd122SStefan Haberland /* 4911d41dd122SStefan Haberland * the device should be disconnected from our LCU structure 4912d41dd122SStefan Haberland * on restore we will reconnect it and reread LCU specific 4913d41dd122SStefan Haberland * information like PAV support that might have changed 4914d41dd122SStefan Haberland */ 4915d41dd122SStefan Haberland dasd_alias_remove_device(device); 4916d41dd122SStefan Haberland dasd_alias_disconnect_device_from_lcu(device); 4917d41dd122SStefan Haberland 4918d41dd122SStefan Haberland return 0; 4919d41dd122SStefan Haberland } 4920d41dd122SStefan Haberland 4921501183f2SStefan Haberland static int dasd_eckd_restore_device(struct dasd_device *device) 4922d41dd122SStefan Haberland { 4923543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 49246fca97a9SStefan Haberland struct dasd_eckd_characteristics temp_rdc_data; 4925f9f8d02fSStefan Haberland int rc; 4926d41dd122SStefan Haberland struct dasd_uid temp_uid; 4927a7602f6cSStefan Haberland unsigned long flags; 4928ea4da6eaSStefan Haberland unsigned long cqr_flags = 0; 4929d41dd122SStefan Haberland 4930d41dd122SStefan Haberland /* Read Configuration Data */ 4931251afd69SStefan Haberland rc = dasd_eckd_read_conf(device); 4932251afd69SStefan Haberland if (rc) { 4933251afd69SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 4934251afd69SStefan Haberland "Read configuration data failed, rc=%d", rc); 4935251afd69SStefan Haberland goto out_err; 4936251afd69SStefan Haberland } 4937d41dd122SStefan Haberland 49382dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 49392dedf0d9SStefan Haberland /* Generate device unique id */ 49402dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 49412dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4942d41dd122SStefan Haberland if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) 4943a7602f6cSStefan Haberland dev_err(&device->cdev->dev, "The UID of the DASD has " 4944a7602f6cSStefan Haberland "changed\n"); 49452dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4946d41dd122SStefan Haberland if (rc) 4947d41dd122SStefan Haberland goto out_err; 4948d41dd122SStefan Haberland 4949d41dd122SStefan Haberland /* register lcu with alias handling, enable PAV if this is a new lcu */ 4950f9f8d02fSStefan Haberland rc = dasd_alias_make_device_known_to_lcu(device); 4951f9f8d02fSStefan Haberland if (rc) 4952251afd69SStefan Haberland goto out_err; 4953ea4da6eaSStefan Haberland 4954ea4da6eaSStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr_flags); 4955ea4da6eaSStefan Haberland dasd_eckd_validate_server(device, cqr_flags); 4956f4ac1d02SStefan Weinhuber 4957f4ac1d02SStefan Weinhuber /* RE-Read Configuration Data */ 4958251afd69SStefan Haberland rc = dasd_eckd_read_conf(device); 4959251afd69SStefan Haberland if (rc) { 4960251afd69SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 4961251afd69SStefan Haberland "Read configuration data failed, rc=%d", rc); 4962251afd69SStefan Haberland goto out_err2; 4963251afd69SStefan Haberland } 4964d41dd122SStefan Haberland 4965d41dd122SStefan Haberland /* Read Feature Codes */ 496668d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 4967d41dd122SStefan Haberland 4968d41dd122SStefan Haberland /* Read Device Characteristics */ 496968b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 49706fca97a9SStefan Haberland &temp_rdc_data, 64); 4971d41dd122SStefan Haberland if (rc) { 4972b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 4973b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 4974251afd69SStefan Haberland goto out_err2; 4975d41dd122SStefan Haberland } 4976a7602f6cSStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 49776fca97a9SStefan Haberland memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data)); 4978a7602f6cSStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4979d41dd122SStefan Haberland 4980d41dd122SStefan Haberland /* add device to alias management */ 4981d41dd122SStefan Haberland dasd_alias_add_device(device); 4982d41dd122SStefan Haberland 4983d41dd122SStefan Haberland return 0; 4984d41dd122SStefan Haberland 4985251afd69SStefan Haberland out_err2: 4986251afd69SStefan Haberland dasd_alias_disconnect_device_from_lcu(device); 4987d41dd122SStefan Haberland out_err: 4988e6125fbaSStefan Haberland return -1; 4989d41dd122SStefan Haberland } 4990d41dd122SStefan Haberland 4991501183f2SStefan Haberland static int dasd_eckd_reload_device(struct dasd_device *device) 4992501183f2SStefan Haberland { 4993543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 4994501183f2SStefan Haberland int rc, old_base; 49952dedf0d9SStefan Haberland char print_uid[60]; 49962dedf0d9SStefan Haberland struct dasd_uid uid; 49972dedf0d9SStefan Haberland unsigned long flags; 4998501183f2SStefan Haberland 499959a9ed5fSStefan Haberland /* 500059a9ed5fSStefan Haberland * remove device from alias handling to prevent new requests 500159a9ed5fSStefan Haberland * from being scheduled on the wrong alias device 500259a9ed5fSStefan Haberland */ 500359a9ed5fSStefan Haberland dasd_alias_remove_device(device); 500459a9ed5fSStefan Haberland 50052dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 5006501183f2SStefan Haberland old_base = private->uid.base_unit_addr; 50072dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 50082dedf0d9SStefan Haberland 5009501183f2SStefan Haberland /* Read Configuration Data */ 5010501183f2SStefan Haberland rc = dasd_eckd_read_conf(device); 5011501183f2SStefan Haberland if (rc) 5012501183f2SStefan Haberland goto out_err; 5013501183f2SStefan Haberland 50142dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 5015501183f2SStefan Haberland if (rc) 5016501183f2SStefan Haberland goto out_err; 5017501183f2SStefan Haberland /* 5018501183f2SStefan Haberland * update unit address configuration and 5019501183f2SStefan Haberland * add device to alias management 5020501183f2SStefan Haberland */ 5021501183f2SStefan Haberland dasd_alias_update_add_device(device); 5022501183f2SStefan Haberland 50232dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &uid); 50242dedf0d9SStefan Haberland 50252dedf0d9SStefan Haberland if (old_base != uid.base_unit_addr) { 50262dedf0d9SStefan Haberland if (strlen(uid.vduit) > 0) 50272dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 50282dedf0d9SStefan Haberland "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial, 50292dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr, uid.vduit); 5030501183f2SStefan Haberland else 50312dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 50322dedf0d9SStefan Haberland "%s.%s.%04x.%02x", uid.vendor, uid.serial, 50332dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr); 5034501183f2SStefan Haberland 5035501183f2SStefan Haberland dev_info(&device->cdev->dev, 5036501183f2SStefan Haberland "An Alias device was reassigned to a new base device " 50372dedf0d9SStefan Haberland "with UID: %s\n", print_uid); 5038501183f2SStefan Haberland } 5039501183f2SStefan Haberland return 0; 5040501183f2SStefan Haberland 5041501183f2SStefan Haberland out_err: 5042501183f2SStefan Haberland return -1; 5043501183f2SStefan Haberland } 5044501183f2SStefan Haberland 50455db8440cSStefan Haberland static int dasd_eckd_read_message_buffer(struct dasd_device *device, 50465db8440cSStefan Haberland struct dasd_rssd_messages *messages, 50475db8440cSStefan Haberland __u8 lpum) 50485db8440cSStefan Haberland { 50495db8440cSStefan Haberland struct dasd_rssd_messages *message_buf; 50505db8440cSStefan Haberland struct dasd_psf_prssd_data *prssdp; 50515db8440cSStefan Haberland struct dasd_ccw_req *cqr; 50525db8440cSStefan Haberland struct ccw1 *ccw; 50535db8440cSStefan Haberland int rc; 50545db8440cSStefan Haberland 50555db8440cSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 50565db8440cSStefan Haberland (sizeof(struct dasd_psf_prssd_data) + 50575db8440cSStefan Haberland sizeof(struct dasd_rssd_messages)), 5058c5205f2fSSebastian Ott device, NULL); 50595db8440cSStefan Haberland if (IS_ERR(cqr)) { 50605db8440cSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 50615db8440cSStefan Haberland "Could not allocate read message buffer request"); 50625db8440cSStefan Haberland return PTR_ERR(cqr); 50635db8440cSStefan Haberland } 50645db8440cSStefan Haberland 5065af775210SStefan Haberland cqr->lpm = lpum; 5066af775210SStefan Haberland retry: 50675db8440cSStefan Haberland cqr->startdev = device; 50685db8440cSStefan Haberland cqr->memdev = device; 50695db8440cSStefan Haberland cqr->block = NULL; 50705db8440cSStefan Haberland cqr->expires = 10 * HZ; 50715db8440cSStefan Haberland set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 5072b179b037SStefan Haberland /* dasd_sleep_on_immediatly does not do complex error 5073b179b037SStefan Haberland * recovery so clear erp flag and set retry counter to 5074b179b037SStefan Haberland * do basic erp */ 5075b179b037SStefan Haberland clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 5076b179b037SStefan Haberland cqr->retries = 256; 50775db8440cSStefan Haberland 50785db8440cSStefan Haberland /* Prepare for Read Subsystem Data */ 50795db8440cSStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 50805db8440cSStefan Haberland memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 50815db8440cSStefan Haberland prssdp->order = PSF_ORDER_PRSSD; 50825db8440cSStefan Haberland prssdp->suborder = 0x03; /* Message Buffer */ 50835db8440cSStefan Haberland /* all other bytes of prssdp must be zero */ 50845db8440cSStefan Haberland 50855db8440cSStefan Haberland ccw = cqr->cpaddr; 50865db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 50875db8440cSStefan Haberland ccw->count = sizeof(struct dasd_psf_prssd_data); 50885db8440cSStefan Haberland ccw->flags |= CCW_FLAG_CC; 50895db8440cSStefan Haberland ccw->flags |= CCW_FLAG_SLI; 50905db8440cSStefan Haberland ccw->cda = (__u32)(addr_t) prssdp; 50915db8440cSStefan Haberland 50925db8440cSStefan Haberland /* Read Subsystem Data - message buffer */ 50935db8440cSStefan Haberland message_buf = (struct dasd_rssd_messages *) (prssdp + 1); 50945db8440cSStefan Haberland memset(message_buf, 0, sizeof(struct dasd_rssd_messages)); 50955db8440cSStefan Haberland 50965db8440cSStefan Haberland ccw++; 50975db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_RSSD; 50985db8440cSStefan Haberland ccw->count = sizeof(struct dasd_rssd_messages); 50995db8440cSStefan Haberland ccw->flags |= CCW_FLAG_SLI; 51005db8440cSStefan Haberland ccw->cda = (__u32)(addr_t) message_buf; 51015db8440cSStefan Haberland 51025db8440cSStefan Haberland cqr->buildclk = get_tod_clock(); 51035db8440cSStefan Haberland cqr->status = DASD_CQR_FILLED; 51045db8440cSStefan Haberland rc = dasd_sleep_on_immediatly(cqr); 51055db8440cSStefan Haberland if (rc == 0) { 51065db8440cSStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 51075db8440cSStefan Haberland message_buf = (struct dasd_rssd_messages *) 51085db8440cSStefan Haberland (prssdp + 1); 51095db8440cSStefan Haberland memcpy(messages, message_buf, 51105db8440cSStefan Haberland sizeof(struct dasd_rssd_messages)); 5111af775210SStefan Haberland } else if (cqr->lpm) { 5112af775210SStefan Haberland /* 5113af775210SStefan Haberland * on z/VM we might not be able to do I/O on the requested path 5114af775210SStefan Haberland * but instead we get the required information on any path 5115af775210SStefan Haberland * so retry with open path mask 5116af775210SStefan Haberland */ 5117af775210SStefan Haberland cqr->lpm = 0; 5118af775210SStefan Haberland goto retry; 51195db8440cSStefan Haberland } else 51205db8440cSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 51215db8440cSStefan Haberland "Reading messages failed with rc=%d\n" 51225db8440cSStefan Haberland , rc); 51235db8440cSStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 51245db8440cSStefan Haberland return rc; 51255db8440cSStefan Haberland } 51265db8440cSStefan Haberland 51275a3b7b11SStefan Haberland static int dasd_eckd_query_host_access(struct dasd_device *device, 51285a3b7b11SStefan Haberland struct dasd_psf_query_host_access *data) 51295a3b7b11SStefan Haberland { 51305a3b7b11SStefan Haberland struct dasd_eckd_private *private = device->private; 51315a3b7b11SStefan Haberland struct dasd_psf_query_host_access *host_access; 51325a3b7b11SStefan Haberland struct dasd_psf_prssd_data *prssdp; 51335a3b7b11SStefan Haberland struct dasd_ccw_req *cqr; 51345a3b7b11SStefan Haberland struct ccw1 *ccw; 51355a3b7b11SStefan Haberland int rc; 51365a3b7b11SStefan Haberland 51375a3b7b11SStefan Haberland /* not available for HYPER PAV alias devices */ 51385a3b7b11SStefan Haberland if (!device->block && private->lcu->pav == HYPER_PAV) 51395a3b7b11SStefan Haberland return -EOPNOTSUPP; 51405a3b7b11SStefan Haberland 5141ccd53fa2SStefan Haberland /* may not be supported by the storage server */ 5142ccd53fa2SStefan Haberland if (!(private->features.feature[14] & 0x80)) 5143ccd53fa2SStefan Haberland return -EOPNOTSUPP; 5144ccd53fa2SStefan Haberland 51455a3b7b11SStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 51465a3b7b11SStefan Haberland sizeof(struct dasd_psf_prssd_data) + 1, 5147c5205f2fSSebastian Ott device, NULL); 51485a3b7b11SStefan Haberland if (IS_ERR(cqr)) { 51495a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 51505a3b7b11SStefan Haberland "Could not allocate read message buffer request"); 51515a3b7b11SStefan Haberland return PTR_ERR(cqr); 51525a3b7b11SStefan Haberland } 51535a3b7b11SStefan Haberland host_access = kzalloc(sizeof(*host_access), GFP_KERNEL | GFP_DMA); 51545a3b7b11SStefan Haberland if (!host_access) { 51555a3b7b11SStefan Haberland dasd_sfree_request(cqr, device); 51565a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 51575a3b7b11SStefan Haberland "Could not allocate host_access buffer"); 51585a3b7b11SStefan Haberland return -ENOMEM; 51595a3b7b11SStefan Haberland } 51605a3b7b11SStefan Haberland cqr->startdev = device; 51615a3b7b11SStefan Haberland cqr->memdev = device; 51625a3b7b11SStefan Haberland cqr->block = NULL; 51635a3b7b11SStefan Haberland cqr->retries = 256; 51645a3b7b11SStefan Haberland cqr->expires = 10 * HZ; 51655a3b7b11SStefan Haberland 51665a3b7b11SStefan Haberland /* Prepare for Read Subsystem Data */ 51675a3b7b11SStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 51685a3b7b11SStefan Haberland memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 51695a3b7b11SStefan Haberland prssdp->order = PSF_ORDER_PRSSD; 51705a3b7b11SStefan Haberland prssdp->suborder = PSF_SUBORDER_QHA; /* query host access */ 51715a3b7b11SStefan Haberland /* LSS and Volume that will be queried */ 51725a3b7b11SStefan Haberland prssdp->lss = private->ned->ID; 51735a3b7b11SStefan Haberland prssdp->volume = private->ned->unit_addr; 51745a3b7b11SStefan Haberland /* all other bytes of prssdp must be zero */ 51755a3b7b11SStefan Haberland 51765a3b7b11SStefan Haberland ccw = cqr->cpaddr; 51775a3b7b11SStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 51785a3b7b11SStefan Haberland ccw->count = sizeof(struct dasd_psf_prssd_data); 51795a3b7b11SStefan Haberland ccw->flags |= CCW_FLAG_CC; 51805a3b7b11SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 51815a3b7b11SStefan Haberland ccw->cda = (__u32)(addr_t) prssdp; 51825a3b7b11SStefan Haberland 51835a3b7b11SStefan Haberland /* Read Subsystem Data - query host access */ 51845a3b7b11SStefan Haberland ccw++; 51855a3b7b11SStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_RSSD; 51865a3b7b11SStefan Haberland ccw->count = sizeof(struct dasd_psf_query_host_access); 51875a3b7b11SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 51885a3b7b11SStefan Haberland ccw->cda = (__u32)(addr_t) host_access; 51895a3b7b11SStefan Haberland 51905a3b7b11SStefan Haberland cqr->buildclk = get_tod_clock(); 51915a3b7b11SStefan Haberland cqr->status = DASD_CQR_FILLED; 5192ab24fbd3SStefan Haberland /* the command might not be supported, suppress error message */ 5193ab24fbd3SStefan Haberland __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); 5194f50af850SStefan Haberland rc = dasd_sleep_on_interruptible(cqr); 51955a3b7b11SStefan Haberland if (rc == 0) { 51965a3b7b11SStefan Haberland *data = *host_access; 51975a3b7b11SStefan Haberland } else { 51985a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 51995a3b7b11SStefan Haberland "Reading host access data failed with rc=%d\n", 52005a3b7b11SStefan Haberland rc); 52015a3b7b11SStefan Haberland rc = -EOPNOTSUPP; 52025a3b7b11SStefan Haberland } 52035a3b7b11SStefan Haberland 52045a3b7b11SStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 52055a3b7b11SStefan Haberland kfree(host_access); 52065a3b7b11SStefan Haberland return rc; 52075a3b7b11SStefan Haberland } 52085a3b7b11SStefan Haberland /* 52095a3b7b11SStefan Haberland * return number of grouped devices 52105a3b7b11SStefan Haberland */ 52115a3b7b11SStefan Haberland static int dasd_eckd_host_access_count(struct dasd_device *device) 52125a3b7b11SStefan Haberland { 52135a3b7b11SStefan Haberland struct dasd_psf_query_host_access *access; 52145a3b7b11SStefan Haberland struct dasd_ckd_path_group_entry *entry; 52155a3b7b11SStefan Haberland struct dasd_ckd_host_information *info; 52165a3b7b11SStefan Haberland int count = 0; 52175a3b7b11SStefan Haberland int rc, i; 52185a3b7b11SStefan Haberland 52195a3b7b11SStefan Haberland access = kzalloc(sizeof(*access), GFP_NOIO); 52205a3b7b11SStefan Haberland if (!access) { 52215a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 52225a3b7b11SStefan Haberland "Could not allocate access buffer"); 52235a3b7b11SStefan Haberland return -ENOMEM; 52245a3b7b11SStefan Haberland } 52255a3b7b11SStefan Haberland rc = dasd_eckd_query_host_access(device, access); 52265a3b7b11SStefan Haberland if (rc) { 52275a3b7b11SStefan Haberland kfree(access); 52285a3b7b11SStefan Haberland return rc; 52295a3b7b11SStefan Haberland } 52305a3b7b11SStefan Haberland 52315a3b7b11SStefan Haberland info = (struct dasd_ckd_host_information *) 52325a3b7b11SStefan Haberland access->host_access_information; 52335a3b7b11SStefan Haberland for (i = 0; i < info->entry_count; i++) { 52345a3b7b11SStefan Haberland entry = (struct dasd_ckd_path_group_entry *) 52355a3b7b11SStefan Haberland (info->entry + i * info->entry_size); 52365a3b7b11SStefan Haberland if (entry->status_flags & DASD_ECKD_PG_GROUPED) 52375a3b7b11SStefan Haberland count++; 52385a3b7b11SStefan Haberland } 52395a3b7b11SStefan Haberland 52405a3b7b11SStefan Haberland kfree(access); 52415a3b7b11SStefan Haberland return count; 52425a3b7b11SStefan Haberland } 52435a3b7b11SStefan Haberland 52445a3b7b11SStefan Haberland /* 52455a3b7b11SStefan Haberland * write host access information to a sequential file 52465a3b7b11SStefan Haberland */ 52475a3b7b11SStefan Haberland static int dasd_hosts_print(struct dasd_device *device, struct seq_file *m) 52485a3b7b11SStefan Haberland { 52495a3b7b11SStefan Haberland struct dasd_psf_query_host_access *access; 52505a3b7b11SStefan Haberland struct dasd_ckd_path_group_entry *entry; 52515a3b7b11SStefan Haberland struct dasd_ckd_host_information *info; 52525a3b7b11SStefan Haberland char sysplex[9] = ""; 5253c7848e14SChristophe JAILLET int rc, i; 52545a3b7b11SStefan Haberland 52555a3b7b11SStefan Haberland access = kzalloc(sizeof(*access), GFP_NOIO); 52565a3b7b11SStefan Haberland if (!access) { 52575a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 52585a3b7b11SStefan Haberland "Could not allocate access buffer"); 52595a3b7b11SStefan Haberland return -ENOMEM; 52605a3b7b11SStefan Haberland } 52615a3b7b11SStefan Haberland rc = dasd_eckd_query_host_access(device, access); 52625a3b7b11SStefan Haberland if (rc) { 52635a3b7b11SStefan Haberland kfree(access); 52645a3b7b11SStefan Haberland return rc; 52655a3b7b11SStefan Haberland } 52665a3b7b11SStefan Haberland 52675a3b7b11SStefan Haberland info = (struct dasd_ckd_host_information *) 52685a3b7b11SStefan Haberland access->host_access_information; 52695a3b7b11SStefan Haberland for (i = 0; i < info->entry_count; i++) { 52705a3b7b11SStefan Haberland entry = (struct dasd_ckd_path_group_entry *) 52715a3b7b11SStefan Haberland (info->entry + i * info->entry_size); 52725a3b7b11SStefan Haberland /* PGID */ 5273c7848e14SChristophe JAILLET seq_printf(m, "pgid %*phN\n", 11, entry->pgid); 52745a3b7b11SStefan Haberland /* FLAGS */ 52755a3b7b11SStefan Haberland seq_printf(m, "status_flags %02x\n", entry->status_flags); 52765a3b7b11SStefan Haberland /* SYSPLEX NAME */ 52775a3b7b11SStefan Haberland memcpy(&sysplex, &entry->sysplex_name, sizeof(sysplex) - 1); 52785a3b7b11SStefan Haberland EBCASC(sysplex, sizeof(sysplex)); 52795a3b7b11SStefan Haberland seq_printf(m, "sysplex_name %8s\n", sysplex); 52805a3b7b11SStefan Haberland /* SUPPORTED CYLINDER */ 52815a3b7b11SStefan Haberland seq_printf(m, "supported_cylinder %d\n", entry->cylinder); 52825a3b7b11SStefan Haberland /* TIMESTAMP */ 52835a3b7b11SStefan Haberland seq_printf(m, "timestamp %lu\n", (unsigned long) 52845a3b7b11SStefan Haberland entry->timestamp); 52855a3b7b11SStefan Haberland } 52865a3b7b11SStefan Haberland kfree(access); 52875a3b7b11SStefan Haberland 52885a3b7b11SStefan Haberland return 0; 52895a3b7b11SStefan Haberland } 52905a3b7b11SStefan Haberland 52915db8440cSStefan Haberland /* 52925db8440cSStefan Haberland * Perform Subsystem Function - CUIR response 52935db8440cSStefan Haberland */ 52945db8440cSStefan Haberland static int 52955db8440cSStefan Haberland dasd_eckd_psf_cuir_response(struct dasd_device *device, int response, 5296a521b048SStefan Haberland __u32 message_id, __u8 lpum) 52975db8440cSStefan Haberland { 52985db8440cSStefan Haberland struct dasd_psf_cuir_response *psf_cuir; 5299a521b048SStefan Haberland int pos = pathmask_to_pos(lpum); 53005db8440cSStefan Haberland struct dasd_ccw_req *cqr; 53015db8440cSStefan Haberland struct ccw1 *ccw; 53025db8440cSStefan Haberland int rc; 53035db8440cSStefan Haberland 53045db8440cSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 53055db8440cSStefan Haberland sizeof(struct dasd_psf_cuir_response), 5306c5205f2fSSebastian Ott device, NULL); 53075db8440cSStefan Haberland 53085db8440cSStefan Haberland if (IS_ERR(cqr)) { 53095db8440cSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 53105db8440cSStefan Haberland "Could not allocate PSF-CUIR request"); 53115db8440cSStefan Haberland return PTR_ERR(cqr); 53125db8440cSStefan Haberland } 53135db8440cSStefan Haberland 53145db8440cSStefan Haberland psf_cuir = (struct dasd_psf_cuir_response *)cqr->data; 53155db8440cSStefan Haberland psf_cuir->order = PSF_ORDER_CUIR_RESPONSE; 53165db8440cSStefan Haberland psf_cuir->cc = response; 5317a521b048SStefan Haberland psf_cuir->chpid = device->path[pos].chpid; 53185db8440cSStefan Haberland psf_cuir->message_id = message_id; 5319a521b048SStefan Haberland psf_cuir->cssid = device->path[pos].cssid; 5320a521b048SStefan Haberland psf_cuir->ssid = device->path[pos].ssid; 53215db8440cSStefan Haberland ccw = cqr->cpaddr; 53225db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 53235db8440cSStefan Haberland ccw->cda = (__u32)(addr_t)psf_cuir; 5324b179b037SStefan Haberland ccw->flags = CCW_FLAG_SLI; 53255db8440cSStefan Haberland ccw->count = sizeof(struct dasd_psf_cuir_response); 53265db8440cSStefan Haberland 53275db8440cSStefan Haberland cqr->startdev = device; 53285db8440cSStefan Haberland cqr->memdev = device; 53295db8440cSStefan Haberland cqr->block = NULL; 53305db8440cSStefan Haberland cqr->retries = 256; 53315db8440cSStefan Haberland cqr->expires = 10*HZ; 53325db8440cSStefan Haberland cqr->buildclk = get_tod_clock(); 53335db8440cSStefan Haberland cqr->status = DASD_CQR_FILLED; 5334b179b037SStefan Haberland set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 53355db8440cSStefan Haberland 53365db8440cSStefan Haberland rc = dasd_sleep_on(cqr); 53375db8440cSStefan Haberland 53385db8440cSStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 53395db8440cSStefan Haberland return rc; 53405db8440cSStefan Haberland } 53415db8440cSStefan Haberland 5342b179b037SStefan Haberland /* 5343b179b037SStefan Haberland * return configuration data that is referenced by record selector 5344b179b037SStefan Haberland * if a record selector is specified or per default return the 5345b179b037SStefan Haberland * conf_data pointer for the path specified by lpum 5346b179b037SStefan Haberland */ 5347b179b037SStefan Haberland static struct dasd_conf_data *dasd_eckd_get_ref_conf(struct dasd_device *device, 5348b179b037SStefan Haberland __u8 lpum, 5349b179b037SStefan Haberland struct dasd_cuir_message *cuir) 53505db8440cSStefan Haberland { 5351b179b037SStefan Haberland struct dasd_conf_data *conf_data; 5352b179b037SStefan Haberland int path, pos; 53535db8440cSStefan Haberland 5354b179b037SStefan Haberland if (cuir->record_selector == 0) 5355b179b037SStefan Haberland goto out; 5356b179b037SStefan Haberland for (path = 0x80, pos = 0; path; path >>= 1, pos++) { 5357c9346151SStefan Haberland conf_data = device->path[pos].conf_data; 5358b179b037SStefan Haberland if (conf_data->gneq.record_selector == 5359b179b037SStefan Haberland cuir->record_selector) 5360b179b037SStefan Haberland return conf_data; 53615db8440cSStefan Haberland } 5362b179b037SStefan Haberland out: 5363c9346151SStefan Haberland return device->path[pathmask_to_pos(lpum)].conf_data; 53645db8440cSStefan Haberland } 53655db8440cSStefan Haberland 53665db8440cSStefan Haberland /* 5367b179b037SStefan Haberland * This function determines the scope of a reconfiguration request by 5368b179b037SStefan Haberland * analysing the path and device selection data provided in the CUIR request. 5369b179b037SStefan Haberland * Returns a path mask containing CUIR affected paths for the give device. 5370b179b037SStefan Haberland * 5371b179b037SStefan Haberland * If the CUIR request does not contain the required information return the 5372b179b037SStefan Haberland * path mask of the path the attention message for the CUIR request was reveived 5373b179b037SStefan Haberland * on. 5374b179b037SStefan Haberland */ 5375b179b037SStefan Haberland static int dasd_eckd_cuir_scope(struct dasd_device *device, __u8 lpum, 5376b179b037SStefan Haberland struct dasd_cuir_message *cuir) 5377b179b037SStefan Haberland { 5378b179b037SStefan Haberland struct dasd_conf_data *ref_conf_data; 5379b179b037SStefan Haberland unsigned long bitmask = 0, mask = 0; 5380b179b037SStefan Haberland struct dasd_conf_data *conf_data; 5381b179b037SStefan Haberland unsigned int pos, path; 5382b179b037SStefan Haberland char *ref_gneq, *gneq; 5383b179b037SStefan Haberland char *ref_ned, *ned; 5384b179b037SStefan Haberland int tbcpm = 0; 5385b179b037SStefan Haberland 5386b179b037SStefan Haberland /* if CUIR request does not specify the scope use the path 5387b179b037SStefan Haberland the attention message was presented on */ 5388b179b037SStefan Haberland if (!cuir->ned_map || 5389b179b037SStefan Haberland !(cuir->neq_map[0] | cuir->neq_map[1] | cuir->neq_map[2])) 5390b179b037SStefan Haberland return lpum; 5391b179b037SStefan Haberland 5392b179b037SStefan Haberland /* get reference conf data */ 5393b179b037SStefan Haberland ref_conf_data = dasd_eckd_get_ref_conf(device, lpum, cuir); 5394b179b037SStefan Haberland /* reference ned is determined by ned_map field */ 5395b179b037SStefan Haberland pos = 8 - ffs(cuir->ned_map); 5396b179b037SStefan Haberland ref_ned = (char *)&ref_conf_data->neds[pos]; 5397b179b037SStefan Haberland ref_gneq = (char *)&ref_conf_data->gneq; 5398b179b037SStefan Haberland /* transfer 24 bit neq_map to mask */ 5399b179b037SStefan Haberland mask = cuir->neq_map[2]; 5400b179b037SStefan Haberland mask |= cuir->neq_map[1] << 8; 5401b179b037SStefan Haberland mask |= cuir->neq_map[0] << 16; 5402b179b037SStefan Haberland 5403c9346151SStefan Haberland for (path = 0; path < 8; path++) { 5404b179b037SStefan Haberland /* initialise data per path */ 5405b179b037SStefan Haberland bitmask = mask; 5406c9346151SStefan Haberland conf_data = device->path[path].conf_data; 5407b179b037SStefan Haberland pos = 8 - ffs(cuir->ned_map); 5408b179b037SStefan Haberland ned = (char *) &conf_data->neds[pos]; 5409b179b037SStefan Haberland /* compare reference ned and per path ned */ 5410b179b037SStefan Haberland if (memcmp(ref_ned, ned, sizeof(*ned)) != 0) 5411b179b037SStefan Haberland continue; 5412b179b037SStefan Haberland gneq = (char *)&conf_data->gneq; 5413b179b037SStefan Haberland /* compare reference gneq and per_path gneq under 5414b179b037SStefan Haberland 24 bit mask where mask bit 0 equals byte 7 of 5415b179b037SStefan Haberland the gneq and mask bit 24 equals byte 31 */ 5416b179b037SStefan Haberland while (bitmask) { 5417b179b037SStefan Haberland pos = ffs(bitmask) - 1; 5418b179b037SStefan Haberland if (memcmp(&ref_gneq[31 - pos], &gneq[31 - pos], 1) 5419b179b037SStefan Haberland != 0) 5420b179b037SStefan Haberland break; 5421b179b037SStefan Haberland clear_bit(pos, &bitmask); 5422b179b037SStefan Haberland } 5423b179b037SStefan Haberland if (bitmask) 5424b179b037SStefan Haberland continue; 5425b179b037SStefan Haberland /* device and path match the reference values 5426b179b037SStefan Haberland add path to CUIR scope */ 5427c9346151SStefan Haberland tbcpm |= 0x80 >> path; 5428b179b037SStefan Haberland } 5429b179b037SStefan Haberland return tbcpm; 5430b179b037SStefan Haberland } 5431b179b037SStefan Haberland 5432b179b037SStefan Haberland static void dasd_eckd_cuir_notify_user(struct dasd_device *device, 5433a521b048SStefan Haberland unsigned long paths, int action) 5434b179b037SStefan Haberland { 5435b179b037SStefan Haberland int pos; 5436b179b037SStefan Haberland 5437b179b037SStefan Haberland while (paths) { 5438b179b037SStefan Haberland /* get position of bit in mask */ 5439a521b048SStefan Haberland pos = 8 - ffs(paths); 5440b179b037SStefan Haberland /* get channel path descriptor from this position */ 5441b179b037SStefan Haberland if (action == CUIR_QUIESCE) 5442a521b048SStefan Haberland pr_warn("Service on the storage server caused path %x.%02x to go offline", 5443a521b048SStefan Haberland device->path[pos].cssid, 5444a521b048SStefan Haberland device->path[pos].chpid); 5445b179b037SStefan Haberland else if (action == CUIR_RESUME) 5446a521b048SStefan Haberland pr_info("Path %x.%02x is back online after service on the storage server", 5447a521b048SStefan Haberland device->path[pos].cssid, 5448a521b048SStefan Haberland device->path[pos].chpid); 5449a521b048SStefan Haberland clear_bit(7 - pos, &paths); 5450b179b037SStefan Haberland } 5451b179b037SStefan Haberland } 5452b179b037SStefan Haberland 5453b179b037SStefan Haberland static int dasd_eckd_cuir_remove_path(struct dasd_device *device, __u8 lpum, 5454b179b037SStefan Haberland struct dasd_cuir_message *cuir) 5455b179b037SStefan Haberland { 5456b179b037SStefan Haberland unsigned long tbcpm; 5457b179b037SStefan Haberland 5458b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(device, lpum, cuir); 5459b179b037SStefan Haberland /* nothing to do if path is not in use */ 5460c9346151SStefan Haberland if (!(dasd_path_get_opm(device) & tbcpm)) 5461b179b037SStefan Haberland return 0; 5462c9346151SStefan Haberland if (!(dasd_path_get_opm(device) & ~tbcpm)) { 5463b179b037SStefan Haberland /* no path would be left if the CUIR action is taken 5464b179b037SStefan Haberland return error */ 5465b179b037SStefan Haberland return -EINVAL; 5466b179b037SStefan Haberland } 5467b179b037SStefan Haberland /* remove device from operational path mask */ 5468c9346151SStefan Haberland dasd_path_remove_opm(device, tbcpm); 5469c9346151SStefan Haberland dasd_path_add_cuirpm(device, tbcpm); 5470b179b037SStefan Haberland return tbcpm; 5471b179b037SStefan Haberland } 5472b179b037SStefan Haberland 5473b179b037SStefan Haberland /* 5474b179b037SStefan Haberland * walk through all devices and build a path mask to quiesce them 5475b179b037SStefan Haberland * return an error if the last path to a device would be removed 54765db8440cSStefan Haberland * 54775db8440cSStefan Haberland * if only part of the devices are quiesced and an error 54785db8440cSStefan Haberland * occurs no onlining necessary, the storage server will 54795db8440cSStefan Haberland * notify the already set offline devices again 54805db8440cSStefan Haberland */ 54815db8440cSStefan Haberland static int dasd_eckd_cuir_quiesce(struct dasd_device *device, __u8 lpum, 5482b179b037SStefan Haberland struct dasd_cuir_message *cuir) 54835db8440cSStefan Haberland { 5484543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 54855db8440cSStefan Haberland struct alias_pav_group *pavgroup, *tempgroup; 54865db8440cSStefan Haberland struct dasd_device *dev, *n; 5487b179b037SStefan Haberland unsigned long paths = 0; 5488b179b037SStefan Haberland unsigned long flags; 5489b179b037SStefan Haberland int tbcpm; 54905db8440cSStefan Haberland 54915db8440cSStefan Haberland /* active devices */ 5492b179b037SStefan Haberland list_for_each_entry_safe(dev, n, &private->lcu->active_devices, 54935db8440cSStefan Haberland alias_list) { 5494b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 5495b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 5496b179b037SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); 5497b179b037SStefan Haberland if (tbcpm < 0) 5498b179b037SStefan Haberland goto out_err; 5499b179b037SStefan Haberland paths |= tbcpm; 55005db8440cSStefan Haberland } 55015db8440cSStefan Haberland /* inactive devices */ 5502b179b037SStefan Haberland list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices, 55035db8440cSStefan Haberland alias_list) { 5504b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 5505b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 5506b179b037SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); 5507b179b037SStefan Haberland if (tbcpm < 0) 5508b179b037SStefan Haberland goto out_err; 5509b179b037SStefan Haberland paths |= tbcpm; 55105db8440cSStefan Haberland } 55115db8440cSStefan Haberland /* devices in PAV groups */ 55125db8440cSStefan Haberland list_for_each_entry_safe(pavgroup, tempgroup, 55135db8440cSStefan Haberland &private->lcu->grouplist, group) { 55145db8440cSStefan Haberland list_for_each_entry_safe(dev, n, &pavgroup->baselist, 55155db8440cSStefan Haberland alias_list) { 5516b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 5517b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 5518b179b037SStefan Haberland spin_unlock_irqrestore( 5519b179b037SStefan Haberland get_ccwdev_lock(dev->cdev), flags); 5520b179b037SStefan Haberland if (tbcpm < 0) 5521b179b037SStefan Haberland goto out_err; 5522b179b037SStefan Haberland paths |= tbcpm; 55235db8440cSStefan Haberland } 55245db8440cSStefan Haberland list_for_each_entry_safe(dev, n, &pavgroup->aliaslist, 55255db8440cSStefan Haberland alias_list) { 5526b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 5527b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 5528b179b037SStefan Haberland spin_unlock_irqrestore( 5529b179b037SStefan Haberland get_ccwdev_lock(dev->cdev), flags); 5530b179b037SStefan Haberland if (tbcpm < 0) 5531b179b037SStefan Haberland goto out_err; 5532b179b037SStefan Haberland paths |= tbcpm; 55335db8440cSStefan Haberland } 55345db8440cSStefan Haberland } 5535b179b037SStefan Haberland /* notify user about all paths affected by CUIR action */ 5536a521b048SStefan Haberland dasd_eckd_cuir_notify_user(device, paths, CUIR_QUIESCE); 5537b179b037SStefan Haberland return 0; 5538b179b037SStefan Haberland out_err: 5539b179b037SStefan Haberland return tbcpm; 55405db8440cSStefan Haberland } 55415db8440cSStefan Haberland 55425db8440cSStefan Haberland static int dasd_eckd_cuir_resume(struct dasd_device *device, __u8 lpum, 5543b179b037SStefan Haberland struct dasd_cuir_message *cuir) 55445db8440cSStefan Haberland { 5545543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 55465db8440cSStefan Haberland struct alias_pav_group *pavgroup, *tempgroup; 55475db8440cSStefan Haberland struct dasd_device *dev, *n; 5548b179b037SStefan Haberland unsigned long paths = 0; 5549b179b037SStefan Haberland int tbcpm; 55505db8440cSStefan Haberland 55515db8440cSStefan Haberland /* 55525db8440cSStefan Haberland * the path may have been added through a generic path event before 55535db8440cSStefan Haberland * only trigger path verification if the path is not already in use 55545db8440cSStefan Haberland */ 55555db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 55565db8440cSStefan Haberland &private->lcu->active_devices, 55575db8440cSStefan Haberland alias_list) { 5558b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 5559b179b037SStefan Haberland paths |= tbcpm; 5560c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 5561c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 55625db8440cSStefan Haberland dasd_schedule_device_bh(dev); 55635db8440cSStefan Haberland } 55645db8440cSStefan Haberland } 55655db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 55665db8440cSStefan Haberland &private->lcu->inactive_devices, 55675db8440cSStefan Haberland alias_list) { 5568b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 5569b179b037SStefan Haberland paths |= tbcpm; 5570c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 5571c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 55725db8440cSStefan Haberland dasd_schedule_device_bh(dev); 55735db8440cSStefan Haberland } 55745db8440cSStefan Haberland } 55755db8440cSStefan Haberland /* devices in PAV groups */ 55765db8440cSStefan Haberland list_for_each_entry_safe(pavgroup, tempgroup, 55775db8440cSStefan Haberland &private->lcu->grouplist, 55785db8440cSStefan Haberland group) { 55795db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 55805db8440cSStefan Haberland &pavgroup->baselist, 55815db8440cSStefan Haberland alias_list) { 5582b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 5583b179b037SStefan Haberland paths |= tbcpm; 5584c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 5585c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 55865db8440cSStefan Haberland dasd_schedule_device_bh(dev); 55875db8440cSStefan Haberland } 55885db8440cSStefan Haberland } 55895db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 55905db8440cSStefan Haberland &pavgroup->aliaslist, 55915db8440cSStefan Haberland alias_list) { 5592b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 5593b179b037SStefan Haberland paths |= tbcpm; 5594c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 5595c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 55965db8440cSStefan Haberland dasd_schedule_device_bh(dev); 55975db8440cSStefan Haberland } 55985db8440cSStefan Haberland } 55995db8440cSStefan Haberland } 5600b179b037SStefan Haberland /* notify user about all paths affected by CUIR action */ 5601a521b048SStefan Haberland dasd_eckd_cuir_notify_user(device, paths, CUIR_RESUME); 5602b179b037SStefan Haberland return 0; 56035db8440cSStefan Haberland } 56045db8440cSStefan Haberland 56055db8440cSStefan Haberland static void dasd_eckd_handle_cuir(struct dasd_device *device, void *messages, 56065db8440cSStefan Haberland __u8 lpum) 56075db8440cSStefan Haberland { 56085db8440cSStefan Haberland struct dasd_cuir_message *cuir = messages; 5609a521b048SStefan Haberland int response; 56105db8440cSStefan Haberland 5611b179b037SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, 5612b179b037SStefan Haberland "CUIR request: %016llx %016llx %016llx %08x", 5613b179b037SStefan Haberland ((u64 *)cuir)[0], ((u64 *)cuir)[1], ((u64 *)cuir)[2], 5614b179b037SStefan Haberland ((u32 *)cuir)[3]); 56155db8440cSStefan Haberland 56165db8440cSStefan Haberland if (cuir->code == CUIR_QUIESCE) { 56175db8440cSStefan Haberland /* quiesce */ 5618a521b048SStefan Haberland if (dasd_eckd_cuir_quiesce(device, lpum, cuir)) 5619b179b037SStefan Haberland response = PSF_CUIR_LAST_PATH; 5620b179b037SStefan Haberland else 5621b179b037SStefan Haberland response = PSF_CUIR_COMPLETED; 56225db8440cSStefan Haberland } else if (cuir->code == CUIR_RESUME) { 56235db8440cSStefan Haberland /* resume */ 5624a521b048SStefan Haberland dasd_eckd_cuir_resume(device, lpum, cuir); 5625b179b037SStefan Haberland response = PSF_CUIR_COMPLETED; 56265db8440cSStefan Haberland } else 56275db8440cSStefan Haberland response = PSF_CUIR_NOT_SUPPORTED; 56285db8440cSStefan Haberland 5629b179b037SStefan Haberland dasd_eckd_psf_cuir_response(device, response, 5630a521b048SStefan Haberland cuir->message_id, lpum); 5631b179b037SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, 5632b179b037SStefan Haberland "CUIR response: %d on message ID %08x", response, 5633b179b037SStefan Haberland cuir->message_id); 5634b179b037SStefan Haberland /* to make sure there is no attention left schedule work again */ 5635b179b037SStefan Haberland device->discipline->check_attention(device, lpum); 56365db8440cSStefan Haberland } 56375db8440cSStefan Haberland 56385db8440cSStefan Haberland static void dasd_eckd_check_attention_work(struct work_struct *work) 56395db8440cSStefan Haberland { 56405db8440cSStefan Haberland struct check_attention_work_data *data; 56415db8440cSStefan Haberland struct dasd_rssd_messages *messages; 56425db8440cSStefan Haberland struct dasd_device *device; 56435db8440cSStefan Haberland int rc; 56445db8440cSStefan Haberland 56455db8440cSStefan Haberland data = container_of(work, struct check_attention_work_data, worker); 56465db8440cSStefan Haberland device = data->device; 56475db8440cSStefan Haberland messages = kzalloc(sizeof(*messages), GFP_KERNEL); 56485db8440cSStefan Haberland if (!messages) { 56495db8440cSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 56505db8440cSStefan Haberland "Could not allocate attention message buffer"); 56515db8440cSStefan Haberland goto out; 56525db8440cSStefan Haberland } 56535db8440cSStefan Haberland rc = dasd_eckd_read_message_buffer(device, messages, data->lpum); 56545db8440cSStefan Haberland if (rc) 56555db8440cSStefan Haberland goto out; 56565db8440cSStefan Haberland if (messages->length == ATTENTION_LENGTH_CUIR && 56575db8440cSStefan Haberland messages->format == ATTENTION_FORMAT_CUIR) 56585db8440cSStefan Haberland dasd_eckd_handle_cuir(device, messages, data->lpum); 56595db8440cSStefan Haberland out: 56605db8440cSStefan Haberland dasd_put_device(device); 56615db8440cSStefan Haberland kfree(messages); 56625db8440cSStefan Haberland kfree(data); 56635db8440cSStefan Haberland } 56645db8440cSStefan Haberland 56655db8440cSStefan Haberland static int dasd_eckd_check_attention(struct dasd_device *device, __u8 lpum) 56665db8440cSStefan Haberland { 56675db8440cSStefan Haberland struct check_attention_work_data *data; 56685db8440cSStefan Haberland 56695db8440cSStefan Haberland data = kzalloc(sizeof(*data), GFP_ATOMIC); 56705db8440cSStefan Haberland if (!data) 56715db8440cSStefan Haberland return -ENOMEM; 56725db8440cSStefan Haberland INIT_WORK(&data->worker, dasd_eckd_check_attention_work); 56735db8440cSStefan Haberland dasd_get_device(device); 56745db8440cSStefan Haberland data->device = device; 56755db8440cSStefan Haberland data->lpum = lpum; 56765db8440cSStefan Haberland schedule_work(&data->worker); 56775db8440cSStefan Haberland return 0; 56785db8440cSStefan Haberland } 56795db8440cSStefan Haberland 5680a521b048SStefan Haberland static int dasd_eckd_disable_hpf_path(struct dasd_device *device, __u8 lpum) 5681a521b048SStefan Haberland { 5682a521b048SStefan Haberland if (~lpum & dasd_path_get_opm(device)) { 5683a521b048SStefan Haberland dasd_path_add_nohpfpm(device, lpum); 5684a521b048SStefan Haberland dasd_path_remove_opm(device, lpum); 5685a521b048SStefan Haberland dev_err(&device->cdev->dev, 5686a521b048SStefan Haberland "Channel path %02X lost HPF functionality and is disabled\n", 5687a521b048SStefan Haberland lpum); 5688a521b048SStefan Haberland return 1; 5689a521b048SStefan Haberland } 5690a521b048SStefan Haberland return 0; 5691a521b048SStefan Haberland } 5692a521b048SStefan Haberland 5693a521b048SStefan Haberland static void dasd_eckd_disable_hpf_device(struct dasd_device *device) 5694a521b048SStefan Haberland { 5695a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 5696a521b048SStefan Haberland 5697a521b048SStefan Haberland dev_err(&device->cdev->dev, 5698a521b048SStefan Haberland "High Performance FICON disabled\n"); 5699a521b048SStefan Haberland private->fcx_max_data = 0; 5700a521b048SStefan Haberland } 5701a521b048SStefan Haberland 5702a521b048SStefan Haberland static int dasd_eckd_hpf_enabled(struct dasd_device *device) 5703a521b048SStefan Haberland { 5704a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 5705a521b048SStefan Haberland 5706a521b048SStefan Haberland return private->fcx_max_data ? 1 : 0; 5707a521b048SStefan Haberland } 5708a521b048SStefan Haberland 5709a521b048SStefan Haberland static void dasd_eckd_handle_hpf_error(struct dasd_device *device, 5710a521b048SStefan Haberland struct irb *irb) 5711a521b048SStefan Haberland { 5712a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 5713a521b048SStefan Haberland 5714a521b048SStefan Haberland if (!private->fcx_max_data) { 5715a521b048SStefan Haberland /* sanity check for no HPF, the error makes no sense */ 5716a521b048SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 5717a521b048SStefan Haberland "Trying to disable HPF for a non HPF device"); 5718a521b048SStefan Haberland return; 5719a521b048SStefan Haberland } 5720a521b048SStefan Haberland if (irb->scsw.tm.sesq == SCSW_SESQ_DEV_NOFCX) { 5721a521b048SStefan Haberland dasd_eckd_disable_hpf_device(device); 5722a521b048SStefan Haberland } else if (irb->scsw.tm.sesq == SCSW_SESQ_PATH_NOFCX) { 5723a521b048SStefan Haberland if (dasd_eckd_disable_hpf_path(device, irb->esw.esw1.lpum)) 5724a521b048SStefan Haberland return; 5725a521b048SStefan Haberland dasd_eckd_disable_hpf_device(device); 5726a521b048SStefan Haberland dasd_path_set_tbvpm(device, 5727a521b048SStefan Haberland dasd_path_get_hpfpm(device)); 5728a521b048SStefan Haberland } 5729a521b048SStefan Haberland /* 5730a521b048SStefan Haberland * prevent that any new I/O ist started on the device and schedule a 5731a521b048SStefan Haberland * requeue of existing requests 5732a521b048SStefan Haberland */ 5733a521b048SStefan Haberland dasd_device_set_stop_bits(device, DASD_STOPPED_NOT_ACC); 5734a521b048SStefan Haberland dasd_schedule_requeue(device); 5735a521b048SStefan Haberland } 5736a521b048SStefan Haberland 5737d41dd122SStefan Haberland static struct ccw_driver dasd_eckd_driver = { 57383bda058bSSebastian Ott .driver = { 5739d41dd122SStefan Haberland .name = "dasd-eckd", 5740d41dd122SStefan Haberland .owner = THIS_MODULE, 57413bda058bSSebastian Ott }, 5742d41dd122SStefan Haberland .ids = dasd_eckd_ids, 5743d41dd122SStefan Haberland .probe = dasd_eckd_probe, 5744d41dd122SStefan Haberland .remove = dasd_generic_remove, 5745d41dd122SStefan Haberland .set_offline = dasd_generic_set_offline, 5746d41dd122SStefan Haberland .set_online = dasd_eckd_set_online, 5747d41dd122SStefan Haberland .notify = dasd_generic_notify, 5748a4d26c6aSStefan Weinhuber .path_event = dasd_generic_path_event, 57494679e893SStefan Haberland .shutdown = dasd_generic_shutdown, 5750d41dd122SStefan Haberland .freeze = dasd_generic_pm_freeze, 5751d41dd122SStefan Haberland .thaw = dasd_generic_restore_device, 5752d41dd122SStefan Haberland .restore = dasd_generic_restore_device, 5753a23ed009SStefan Haberland .uc_handler = dasd_generic_uc_handler, 5754420f42ecSHeiko Carstens .int_class = IRQIO_DAS, 5755d41dd122SStefan Haberland }; 5756f3eb5384SStefan Weinhuber 57571da177e4SLinus Torvalds /* 57581da177e4SLinus Torvalds * max_blocks is dependent on the amount of storage that is available 57591da177e4SLinus Torvalds * in the static io buffer for each device. Currently each device has 57601da177e4SLinus Torvalds * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has 57611da177e4SLinus Torvalds * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use 57621da177e4SLinus Torvalds * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In 57631da177e4SLinus Torvalds * addition we have one define extent ccw + 16 bytes of data and one 57641da177e4SLinus Torvalds * locate record ccw + 16 bytes of data. That makes: 57651da177e4SLinus Torvalds * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. 57661da177e4SLinus Torvalds * We want to fit two into the available memory so that we can immediately 57671da177e4SLinus Torvalds * start the next request if one finishes off. That makes 249.5 blocks 57681da177e4SLinus Torvalds * for one request. Give a little safety and the result is 240. 57691da177e4SLinus Torvalds */ 57701da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline = { 57711da177e4SLinus Torvalds .owner = THIS_MODULE, 57721da177e4SLinus Torvalds .name = "ECKD", 57731da177e4SLinus Torvalds .ebcname = "ECKD", 5774ef19298bSStefan Weinhuber .max_blocks = 190, 57751da177e4SLinus Torvalds .check_device = dasd_eckd_check_characteristics, 57768e09f215SStefan Weinhuber .uncheck_device = dasd_eckd_uncheck_device, 57771da177e4SLinus Torvalds .do_analysis = dasd_eckd_do_analysis, 5778a4d26c6aSStefan Weinhuber .verify_path = dasd_eckd_verify_path, 5779d42e1712SStefan Haberland .basic_to_ready = dasd_eckd_basic_to_ready, 57808e09f215SStefan Weinhuber .online_to_ready = dasd_eckd_online_to_ready, 5781daa991bfSStefan Haberland .basic_to_known = dasd_eckd_basic_to_known, 57821da177e4SLinus Torvalds .fill_geometry = dasd_eckd_fill_geometry, 57831da177e4SLinus Torvalds .start_IO = dasd_start_IO, 57841da177e4SLinus Torvalds .term_IO = dasd_term_IO, 57858e09f215SStefan Weinhuber .handle_terminated_request = dasd_eckd_handle_terminated_request, 57861da177e4SLinus Torvalds .format_device = dasd_eckd_format_device, 57878fd57520SJan Höppner .check_device_format = dasd_eckd_check_device_format, 57881da177e4SLinus Torvalds .erp_action = dasd_eckd_erp_action, 57891da177e4SLinus Torvalds .erp_postaction = dasd_eckd_erp_postaction, 57905a27e60dSStefan Weinhuber .check_for_device_change = dasd_eckd_check_for_device_change, 57918e09f215SStefan Weinhuber .build_cp = dasd_eckd_build_alias_cp, 57928e09f215SStefan Weinhuber .free_cp = dasd_eckd_free_alias_cp, 57931da177e4SLinus Torvalds .dump_sense = dasd_eckd_dump_sense, 5794fc19f381SStefan Haberland .dump_sense_dbf = dasd_eckd_dump_sense_dbf, 57951da177e4SLinus Torvalds .fill_info = dasd_eckd_fill_info, 57961107ccfbSChristoph Hellwig .ioctl = dasd_eckd_ioctl, 5797d41dd122SStefan Haberland .freeze = dasd_eckd_pm_freeze, 5798d41dd122SStefan Haberland .restore = dasd_eckd_restore_device, 5799501183f2SStefan Haberland .reload = dasd_eckd_reload_device, 58002dedf0d9SStefan Haberland .get_uid = dasd_eckd_get_uid, 5801f1633031SStefan Haberland .kick_validate = dasd_eckd_kick_validate_server, 58025db8440cSStefan Haberland .check_attention = dasd_eckd_check_attention, 58035a3b7b11SStefan Haberland .host_access_count = dasd_eckd_host_access_count, 58045a3b7b11SStefan Haberland .hosts_print = dasd_hosts_print, 5805a521b048SStefan Haberland .handle_hpf_error = dasd_eckd_handle_hpf_error, 5806a521b048SStefan Haberland .disable_hpf = dasd_eckd_disable_hpf_device, 5807a521b048SStefan Haberland .hpf_enabled = dasd_eckd_hpf_enabled, 5808a521b048SStefan Haberland .reset_path = dasd_eckd_reset_path, 58091da177e4SLinus Torvalds }; 58101da177e4SLinus Torvalds 58111da177e4SLinus Torvalds static int __init 58121da177e4SLinus Torvalds dasd_eckd_init(void) 58131da177e4SLinus Torvalds { 5814736e6ea0SSebastian Ott int ret; 5815736e6ea0SSebastian Ott 58161da177e4SLinus Torvalds ASCEBC(dasd_eckd_discipline.ebcname, 4); 5817f932bceaSStefan Weinhuber dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), 5818f932bceaSStefan Weinhuber GFP_KERNEL | GFP_DMA); 5819f932bceaSStefan Weinhuber if (!dasd_reserve_req) 5820f932bceaSStefan Weinhuber return -ENOMEM; 5821a4d26c6aSStefan Weinhuber path_verification_worker = kmalloc(sizeof(*path_verification_worker), 5822a4d26c6aSStefan Weinhuber GFP_KERNEL | GFP_DMA); 5823a4d26c6aSStefan Weinhuber if (!path_verification_worker) { 5824a4d26c6aSStefan Weinhuber kfree(dasd_reserve_req); 5825a4d26c6aSStefan Weinhuber return -ENOMEM; 5826a4d26c6aSStefan Weinhuber } 5827558b9ef0SStefan Weinhuber rawpadpage = (void *)__get_free_page(GFP_KERNEL); 5828558b9ef0SStefan Weinhuber if (!rawpadpage) { 5829558b9ef0SStefan Weinhuber kfree(path_verification_worker); 5830558b9ef0SStefan Weinhuber kfree(dasd_reserve_req); 5831558b9ef0SStefan Weinhuber return -ENOMEM; 5832558b9ef0SStefan Weinhuber } 5833736e6ea0SSebastian Ott ret = ccw_driver_register(&dasd_eckd_driver); 5834736e6ea0SSebastian Ott if (!ret) 5835736e6ea0SSebastian Ott wait_for_device_probe(); 5836a4d26c6aSStefan Weinhuber else { 5837a4d26c6aSStefan Weinhuber kfree(path_verification_worker); 5838f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 5839558b9ef0SStefan Weinhuber free_page((unsigned long)rawpadpage); 5840a4d26c6aSStefan Weinhuber } 5841736e6ea0SSebastian Ott return ret; 58421da177e4SLinus Torvalds } 58431da177e4SLinus Torvalds 58441da177e4SLinus Torvalds static void __exit 58451da177e4SLinus Torvalds dasd_eckd_cleanup(void) 58461da177e4SLinus Torvalds { 58471da177e4SLinus Torvalds ccw_driver_unregister(&dasd_eckd_driver); 5848a4d26c6aSStefan Weinhuber kfree(path_verification_worker); 5849f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 5850558b9ef0SStefan Weinhuber free_page((unsigned long)rawpadpage); 58511da177e4SLinus Torvalds } 58521da177e4SLinus Torvalds 58531da177e4SLinus Torvalds module_init(dasd_eckd_init); 58541da177e4SLinus Torvalds module_exit(dasd_eckd_cleanup); 5855