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 45e4dbb0f2SStefan Haberland /* 46e4dbb0f2SStefan Haberland * raw track access always map to 64k in memory 47e4dbb0f2SStefan Haberland * so it maps to 16 blocks of 4k per track 48e4dbb0f2SStefan Haberland */ 49e4dbb0f2SStefan Haberland #define DASD_RAW_BLOCK_PER_TRACK 16 50e4dbb0f2SStefan Haberland #define DASD_RAW_BLOCKSIZE 4096 51e4dbb0f2SStefan Haberland /* 64k are 128 x 512 byte sectors */ 52e4dbb0f2SStefan Haberland #define DASD_RAW_SECTORS_PER_TRACK 128 53e4dbb0f2SStefan Haberland 541da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 551da177e4SLinus Torvalds 561da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline; 571da177e4SLinus Torvalds 581da177e4SLinus Torvalds /* The ccw bus type uses this table to find devices that it sends to 591da177e4SLinus Torvalds * dasd_eckd_probe */ 601da177e4SLinus Torvalds static struct ccw_device_id dasd_eckd_ids[] = { 61d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3390, 0), .driver_info = 0x1}, 62d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3390, 0), .driver_info = 0x2}, 635da24b76SStefan Haberland { CCW_DEVICE_DEVTYPE (0x3880, 0, 0x3380, 0), .driver_info = 0x3}, 64d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x3990, 0, 0x3380, 0), .driver_info = 0x4}, 65d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2105, 0, 0x3380, 0), .driver_info = 0x5}, 66d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x9343, 0, 0x9345, 0), .driver_info = 0x6}, 67d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3390, 0), .driver_info = 0x7}, 68d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x2107, 0, 0x3380, 0), .driver_info = 0x8}, 69d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3390, 0), .driver_info = 0x9}, 70d2c993d8SHeiko Carstens { CCW_DEVICE_DEVTYPE (0x1750, 0, 0x3380, 0), .driver_info = 0xa}, 711da177e4SLinus Torvalds { /* end of list */ }, 721da177e4SLinus Torvalds }; 731da177e4SLinus Torvalds 741da177e4SLinus Torvalds MODULE_DEVICE_TABLE(ccw, dasd_eckd_ids); 751da177e4SLinus Torvalds 761da177e4SLinus Torvalds static struct ccw_driver dasd_eckd_driver; /* see below */ 771da177e4SLinus Torvalds 78558b9ef0SStefan Weinhuber static void *rawpadpage; 79558b9ef0SStefan Weinhuber 80eb6e199bSStefan Weinhuber #define INIT_CQR_OK 0 81eb6e199bSStefan Weinhuber #define INIT_CQR_UNFORMATTED 1 82eb6e199bSStefan Weinhuber #define INIT_CQR_ERROR 2 83eb6e199bSStefan Weinhuber 84f932bceaSStefan Weinhuber /* emergency request for reserve/release */ 85f932bceaSStefan Weinhuber static struct { 86f932bceaSStefan Weinhuber struct dasd_ccw_req cqr; 87f932bceaSStefan Weinhuber struct ccw1 ccw; 88f932bceaSStefan Weinhuber char data[32]; 89f932bceaSStefan Weinhuber } *dasd_reserve_req; 90f932bceaSStefan Weinhuber static DEFINE_MUTEX(dasd_reserve_mutex); 91f932bceaSStefan Weinhuber 92a4d26c6aSStefan Weinhuber /* definitions for the path verification worker */ 93a4d26c6aSStefan Weinhuber struct path_verification_work_data { 94a4d26c6aSStefan Weinhuber struct work_struct worker; 95a4d26c6aSStefan Weinhuber struct dasd_device *device; 96a4d26c6aSStefan Weinhuber struct dasd_ccw_req cqr; 97a4d26c6aSStefan Weinhuber struct ccw1 ccw; 98a4d26c6aSStefan Weinhuber __u8 rcd_buffer[DASD_ECKD_RCD_DATA_SIZE]; 99a4d26c6aSStefan Weinhuber int isglobal; 100a4d26c6aSStefan Weinhuber __u8 tbvpm; 101a4d26c6aSStefan Weinhuber }; 102a4d26c6aSStefan Weinhuber static struct path_verification_work_data *path_verification_worker; 103a4d26c6aSStefan Weinhuber static DEFINE_MUTEX(dasd_path_verification_mutex); 104eb6e199bSStefan Weinhuber 1055db8440cSStefan Haberland struct check_attention_work_data { 1065db8440cSStefan Haberland struct work_struct worker; 1075db8440cSStefan Haberland struct dasd_device *device; 1085db8440cSStefan Haberland __u8 lpum; 1095db8440cSStefan Haberland }; 1105db8440cSStefan Haberland 1118fd57520SJan Höppner static int prepare_itcw(struct itcw *, unsigned int, unsigned int, int, 1128fd57520SJan Höppner struct dasd_device *, struct dasd_device *, 1138fd57520SJan Höppner unsigned int, int, unsigned int, unsigned int, 1148fd57520SJan Höppner unsigned int, unsigned int); 1158fd57520SJan Höppner 1161da177e4SLinus Torvalds /* initial attempt at a probe function. this can be simplified once 1171da177e4SLinus Torvalds * the other detection code is gone */ 1181da177e4SLinus Torvalds static int 1191da177e4SLinus Torvalds dasd_eckd_probe (struct ccw_device *cdev) 1201da177e4SLinus Torvalds { 1211da177e4SLinus Torvalds int ret; 1221da177e4SLinus Torvalds 12340545573SHorst Hummel /* set ECKD specific ccw-device options */ 124454e1fa1SPeter Oberparleiter ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE | 125454e1fa1SPeter Oberparleiter CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH); 12640545573SHorst Hummel if (ret) { 127b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s", 128b8ed5dd5SStefan Haberland "dasd_eckd_probe: could not set " 129b8ed5dd5SStefan Haberland "ccw-device options"); 1301da177e4SLinus Torvalds return ret; 13140545573SHorst Hummel } 13240545573SHorst Hummel ret = dasd_generic_probe(cdev, &dasd_eckd_discipline); 13340545573SHorst Hummel return ret; 1341da177e4SLinus Torvalds } 1351da177e4SLinus Torvalds 1361da177e4SLinus Torvalds static int 1371da177e4SLinus Torvalds dasd_eckd_set_online(struct ccw_device *cdev) 1381da177e4SLinus Torvalds { 1391da177e4SLinus Torvalds return dasd_generic_set_online(cdev, &dasd_eckd_discipline); 1401da177e4SLinus Torvalds } 1411da177e4SLinus Torvalds 1421da177e4SLinus Torvalds static const int sizes_trk0[] = { 28, 148, 84 }; 1431da177e4SLinus Torvalds #define LABEL_SIZE 140 1441da177e4SLinus Torvalds 1453bc9fef9SStefan Haberland /* head and record addresses of count_area read in analysis ccw */ 146ce6915f5SJan Höppner static const int count_area_head[] = { 0, 0, 0, 0, 1 }; 1473bc9fef9SStefan Haberland static const int count_area_rec[] = { 1, 2, 3, 4, 1 }; 1483bc9fef9SStefan Haberland 1491da177e4SLinus Torvalds static inline unsigned int 1501da177e4SLinus Torvalds ceil_quot(unsigned int d1, unsigned int d2) 1511da177e4SLinus Torvalds { 1521da177e4SLinus Torvalds return (d1 + (d2 - 1)) / d2; 1531da177e4SLinus Torvalds } 1541da177e4SLinus Torvalds 1554d284cacSHeiko Carstens static unsigned int 1561da177e4SLinus Torvalds recs_per_track(struct dasd_eckd_characteristics * rdc, 1571da177e4SLinus Torvalds unsigned int kl, unsigned int dl) 1581da177e4SLinus Torvalds { 1591da177e4SLinus Torvalds int dn, kn; 1601da177e4SLinus Torvalds 1611da177e4SLinus Torvalds switch (rdc->dev_type) { 1621da177e4SLinus Torvalds case 0x3380: 1631da177e4SLinus Torvalds if (kl) 1641da177e4SLinus Torvalds return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + 1651da177e4SLinus Torvalds ceil_quot(dl + 12, 32)); 1661da177e4SLinus Torvalds else 1671da177e4SLinus Torvalds return 1499 / (15 + ceil_quot(dl + 12, 32)); 1681da177e4SLinus Torvalds case 0x3390: 1691da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1701da177e4SLinus Torvalds if (kl) { 1711da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1721da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + 1731da177e4SLinus Torvalds 9 + ceil_quot(dl + 6 * dn, 34)); 1741da177e4SLinus Torvalds } else 1751da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); 1761da177e4SLinus Torvalds case 0x9345: 1771da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1781da177e4SLinus Torvalds if (kl) { 1791da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1801da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + 1811da177e4SLinus Torvalds ceil_quot(dl + 6 * dn, 34)); 1821da177e4SLinus Torvalds } else 1831da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); 1841da177e4SLinus Torvalds } 1851da177e4SLinus Torvalds return 0; 1861da177e4SLinus Torvalds } 1871da177e4SLinus Torvalds 188b44b0ab3SStefan Weinhuber static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head) 189b44b0ab3SStefan Weinhuber { 190b44b0ab3SStefan Weinhuber geo->cyl = (__u16) cyl; 191b44b0ab3SStefan Weinhuber geo->head = cyl >> 16; 192b44b0ab3SStefan Weinhuber geo->head <<= 4; 193b44b0ab3SStefan Weinhuber geo->head |= head; 194b44b0ab3SStefan Weinhuber } 195b44b0ab3SStefan Weinhuber 1965628683cSStefan Haberland static int set_timestamp(struct ccw1 *ccw, struct DE_eckd_data *data, 1971da177e4SLinus Torvalds struct dasd_device *device) 1981da177e4SLinus Torvalds { 199543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 200d54853efSMartin Schwidefsky int rc; 2011da177e4SLinus Torvalds 2025628683cSStefan Haberland rc = get_phys_clock(&data->ep_sys_time); 2035628683cSStefan Haberland /* 2045628683cSStefan Haberland * Ignore return code if XRC is not supported or 2055628683cSStefan Haberland * sync clock is switched off 2065628683cSStefan Haberland */ 2075628683cSStefan Haberland if ((rc && !private->rdc_data.facilities.XRC_supported) || 2085628683cSStefan Haberland rc == -EOPNOTSUPP || rc == -EACCES) 209d54853efSMartin Schwidefsky return 0; 2101da177e4SLinus Torvalds 2111da177e4SLinus Torvalds /* switch on System Time Stamp - needed for XRC Support */ 2121da177e4SLinus Torvalds data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ 2131da177e4SLinus Torvalds data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ 2141da177e4SLinus Torvalds 21545f186beSJan Höppner if (ccw) { 21645f186beSJan Höppner ccw->count = sizeof(struct DE_eckd_data); 21745f186beSJan Höppner ccw->flags |= CCW_FLAG_SLI; 21845f186beSJan Höppner } 21945f186beSJan Höppner 220d54853efSMartin Schwidefsky return rc; 2211da177e4SLinus Torvalds } 2221da177e4SLinus Torvalds 2234d284cacSHeiko Carstens static int 224b44b0ab3SStefan Weinhuber define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk, 22545f186beSJan Höppner unsigned int totrk, int cmd, struct dasd_device *device, 22645f186beSJan Höppner int blksize) 2271da177e4SLinus Torvalds { 228543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 229b44b0ab3SStefan Weinhuber u16 heads, beghead, endhead; 23045f186beSJan Höppner u32 begcyl, endcyl; 231d54853efSMartin Schwidefsky int rc = 0; 2321da177e4SLinus Torvalds 23345f186beSJan Höppner if (ccw) { 2341da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; 2351da177e4SLinus Torvalds ccw->flags = 0; 2361da177e4SLinus Torvalds ccw->count = 16; 2371da177e4SLinus Torvalds ccw->cda = (__u32)__pa(data); 23845f186beSJan Höppner } 2391da177e4SLinus Torvalds 2401da177e4SLinus Torvalds memset(data, 0, sizeof(struct DE_eckd_data)); 2411da177e4SLinus Torvalds switch (cmd) { 2421da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 2431da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 2441da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 2451da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 2461da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 2471da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 2481da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 2491da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 2501da177e4SLinus Torvalds data->mask.perm = 0x1; 2511da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 2521da177e4SLinus Torvalds break; 2538fd57520SJan Höppner case DASD_ECKD_CCW_READ_COUNT: 2548fd57520SJan Höppner data->mask.perm = 0x1; 2558fd57520SJan Höppner data->attributes.operation = DASD_BYPASS_CACHE; 2568fd57520SJan Höppner break; 25745f186beSJan Höppner case DASD_ECKD_CCW_READ_TRACK: 25845f186beSJan Höppner case DASD_ECKD_CCW_READ_TRACK_DATA: 25945f186beSJan Höppner data->mask.perm = 0x1; 26045f186beSJan Höppner data->attributes.operation = private->attrib.operation; 26145f186beSJan Höppner data->blk_size = 0; 26245f186beSJan Höppner break; 2631da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 2641da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 2651da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 2661da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 2671da177e4SLinus Torvalds data->mask.perm = 0x02; 2681da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 2695628683cSStefan Haberland rc = set_timestamp(ccw, data, device); 2701da177e4SLinus Torvalds break; 2711da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 2721da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 2731da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 2745628683cSStefan Haberland rc = set_timestamp(ccw, data, device); 2751da177e4SLinus Torvalds break; 2761da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 2771da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 2781da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 2791da177e4SLinus Torvalds data->mask.perm = 0x3; 2801da177e4SLinus Torvalds data->mask.auth = 0x1; 2811da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 2825628683cSStefan Haberland rc = set_timestamp(ccw, data, device); 2831da177e4SLinus Torvalds break; 28445f186beSJan Höppner case DASD_ECKD_CCW_WRITE_FULL_TRACK: 28545f186beSJan Höppner data->mask.perm = 0x03; 28645f186beSJan Höppner data->attributes.operation = private->attrib.operation; 28745f186beSJan Höppner data->blk_size = 0; 28845f186beSJan Höppner break; 28945f186beSJan Höppner case DASD_ECKD_CCW_WRITE_TRACK_DATA: 29045f186beSJan Höppner data->mask.perm = 0x02; 29145f186beSJan Höppner data->attributes.operation = private->attrib.operation; 29245f186beSJan Höppner data->blk_size = blksize; 2935628683cSStefan Haberland rc = set_timestamp(ccw, data, device); 29445f186beSJan Höppner break; 2951da177e4SLinus Torvalds default: 296fc19f381SStefan Haberland dev_err(&device->cdev->dev, 297fc19f381SStefan Haberland "0x%x is not a known command\n", cmd); 2981da177e4SLinus Torvalds break; 2991da177e4SLinus Torvalds } 3001da177e4SLinus Torvalds 3011da177e4SLinus Torvalds data->attributes.mode = 0x3; /* ECKD */ 3021da177e4SLinus Torvalds 3031da177e4SLinus Torvalds if ((private->rdc_data.cu_type == 0x2105 || 3041da177e4SLinus Torvalds private->rdc_data.cu_type == 0x2107 || 3051da177e4SLinus Torvalds private->rdc_data.cu_type == 0x1750) 3061da177e4SLinus Torvalds && !(private->uses_cdl && trk < 2)) 3071da177e4SLinus Torvalds data->ga_extended |= 0x40; /* Regular Data Format Mode */ 3081da177e4SLinus Torvalds 309b44b0ab3SStefan Weinhuber heads = private->rdc_data.trk_per_cyl; 310b44b0ab3SStefan Weinhuber begcyl = trk / heads; 311b44b0ab3SStefan Weinhuber beghead = trk % heads; 312b44b0ab3SStefan Weinhuber endcyl = totrk / heads; 313b44b0ab3SStefan Weinhuber endhead = totrk % heads; 3141da177e4SLinus Torvalds 3151da177e4SLinus Torvalds /* check for sequential prestage - enhance cylinder range */ 3161da177e4SLinus Torvalds if (data->attributes.operation == DASD_SEQ_PRESTAGE || 3171da177e4SLinus Torvalds data->attributes.operation == DASD_SEQ_ACCESS) { 3181da177e4SLinus Torvalds 319b44b0ab3SStefan Weinhuber if (endcyl + private->attrib.nr_cyl < private->real_cyl) 320b44b0ab3SStefan Weinhuber endcyl += private->attrib.nr_cyl; 3211da177e4SLinus Torvalds else 322b44b0ab3SStefan Weinhuber endcyl = (private->real_cyl - 1); 3231da177e4SLinus Torvalds } 3241da177e4SLinus Torvalds 325b44b0ab3SStefan Weinhuber set_ch_t(&data->beg_ext, begcyl, beghead); 326b44b0ab3SStefan Weinhuber set_ch_t(&data->end_ext, endcyl, endhead); 327d54853efSMartin Schwidefsky return rc; 3281da177e4SLinus Torvalds } 3291da177e4SLinus Torvalds 3308e09f215SStefan Weinhuber 33145f186beSJan Höppner static void locate_record_ext(struct ccw1 *ccw, struct LRE_eckd_data *data, 33245f186beSJan Höppner unsigned int trk, unsigned int rec_on_trk, 33345f186beSJan Höppner int count, int cmd, struct dasd_device *device, 33445f186beSJan Höppner unsigned int reclen, unsigned int tlf) 335f3eb5384SStefan Weinhuber { 336543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 337f3eb5384SStefan Weinhuber int sector; 338f3eb5384SStefan Weinhuber int dn, d; 339f3eb5384SStefan Weinhuber 34045f186beSJan Höppner if (ccw) { 34145f186beSJan Höppner ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD_EXT; 34245f186beSJan Höppner ccw->flags = 0; 34345f186beSJan Höppner if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) 34445f186beSJan Höppner ccw->count = 22; 34545f186beSJan Höppner else 34645f186beSJan Höppner ccw->count = 20; 34745f186beSJan Höppner ccw->cda = (__u32)__pa(data); 34845f186beSJan Höppner } 34945f186beSJan Höppner 350f3eb5384SStefan Weinhuber memset(data, 0, sizeof(*data)); 351f3eb5384SStefan Weinhuber sector = 0; 352f3eb5384SStefan Weinhuber if (rec_on_trk) { 353f3eb5384SStefan Weinhuber switch (private->rdc_data.dev_type) { 354f3eb5384SStefan Weinhuber case 0x3390: 355f3eb5384SStefan Weinhuber dn = ceil_quot(reclen + 6, 232); 356f3eb5384SStefan Weinhuber d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 357f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 358f3eb5384SStefan Weinhuber break; 359f3eb5384SStefan Weinhuber case 0x3380: 360f3eb5384SStefan Weinhuber d = 7 + ceil_quot(reclen + 12, 32); 361f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 362f3eb5384SStefan Weinhuber break; 363f3eb5384SStefan Weinhuber } 364f3eb5384SStefan Weinhuber } 365f3eb5384SStefan Weinhuber data->sector = sector; 366f3eb5384SStefan Weinhuber /* note: meaning of count depends on the operation 367f3eb5384SStefan Weinhuber * for record based I/O it's the number of records, but for 368f3eb5384SStefan Weinhuber * track based I/O it's the number of tracks 369f3eb5384SStefan Weinhuber */ 370f3eb5384SStefan Weinhuber data->count = count; 371f3eb5384SStefan Weinhuber switch (cmd) { 372f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 373f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 374f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 375f3eb5384SStefan Weinhuber break; 376f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_HOME_ADDRESS: 377f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 378f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 379f3eb5384SStefan Weinhuber break; 380f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 381f3eb5384SStefan Weinhuber data->operation.orientation = 0x1; 382f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 383f3eb5384SStefan Weinhuber data->count++; 384f3eb5384SStefan Weinhuber break; 385f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_RECORD_ZERO: 386f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 387f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 388f3eb5384SStefan Weinhuber data->count++; 389f3eb5384SStefan Weinhuber break; 390f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE: 391f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_MT: 392f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD: 393f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD_MT: 394f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 395f3eb5384SStefan Weinhuber data->length = reclen; 396f3eb5384SStefan Weinhuber data->operation.operation = 0x01; 397f3eb5384SStefan Weinhuber break; 398f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD: 399f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD_MT: 400f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 401f3eb5384SStefan Weinhuber data->length = reclen; 402f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 403f3eb5384SStefan Weinhuber break; 404e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_WRITE_FULL_TRACK: 405e4dbb0f2SStefan Haberland data->operation.orientation = 0x0; 406e4dbb0f2SStefan Haberland data->operation.operation = 0x3F; 407e4dbb0f2SStefan Haberland data->extended_operation = 0x11; 408e4dbb0f2SStefan Haberland data->length = 0; 409e4dbb0f2SStefan Haberland data->extended_parameter_length = 0x02; 410e4dbb0f2SStefan Haberland if (data->count > 8) { 411e4dbb0f2SStefan Haberland data->extended_parameter[0] = 0xFF; 412e4dbb0f2SStefan Haberland data->extended_parameter[1] = 0xFF; 413e4dbb0f2SStefan Haberland data->extended_parameter[1] <<= (16 - count); 414e4dbb0f2SStefan Haberland } else { 415e4dbb0f2SStefan Haberland data->extended_parameter[0] = 0xFF; 416e4dbb0f2SStefan Haberland data->extended_parameter[0] <<= (8 - count); 417e4dbb0f2SStefan Haberland data->extended_parameter[1] = 0x00; 418e4dbb0f2SStefan Haberland } 419e4dbb0f2SStefan Haberland data->sector = 0xFF; 420e4dbb0f2SStefan Haberland break; 421f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 422f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 423f3eb5384SStefan Weinhuber data->length = reclen; /* not tlf, as one might think */ 424f3eb5384SStefan Weinhuber data->operation.operation = 0x3F; 425f3eb5384SStefan Weinhuber data->extended_operation = 0x23; 426f3eb5384SStefan Weinhuber break; 427f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ: 428f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_MT: 429f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_KD: 430f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_KD_MT: 431f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 432f3eb5384SStefan Weinhuber data->length = reclen; 433f3eb5384SStefan Weinhuber data->operation.operation = 0x06; 434f3eb5384SStefan Weinhuber break; 435f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD: 436f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD_MT: 437f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 438f3eb5384SStefan Weinhuber data->length = reclen; 439f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 440f3eb5384SStefan Weinhuber break; 441f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_COUNT: 442f3eb5384SStefan Weinhuber data->operation.operation = 0x06; 443f3eb5384SStefan Weinhuber break; 444e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_READ_TRACK: 445e4dbb0f2SStefan Haberland data->operation.orientation = 0x1; 446e4dbb0f2SStefan Haberland data->operation.operation = 0x0C; 447e4dbb0f2SStefan Haberland data->extended_parameter_length = 0; 448e4dbb0f2SStefan Haberland data->sector = 0xFF; 449e4dbb0f2SStefan Haberland break; 450f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 451f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 452f3eb5384SStefan Weinhuber data->length = tlf; 453f3eb5384SStefan Weinhuber data->operation.operation = 0x0C; 454f3eb5384SStefan Weinhuber break; 455f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_ERASE: 456f3eb5384SStefan Weinhuber data->length = reclen; 457f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 458f3eb5384SStefan Weinhuber data->operation.operation = 0x0b; 459f3eb5384SStefan Weinhuber break; 460f3eb5384SStefan Weinhuber default: 461f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, device, 462f3eb5384SStefan Weinhuber "fill LRE unknown opcode 0x%x", cmd); 463f3eb5384SStefan Weinhuber BUG(); 464f3eb5384SStefan Weinhuber } 465f3eb5384SStefan Weinhuber set_ch_t(&data->seek_addr, 466f3eb5384SStefan Weinhuber trk / private->rdc_data.trk_per_cyl, 467f3eb5384SStefan Weinhuber trk % private->rdc_data.trk_per_cyl); 468f3eb5384SStefan Weinhuber data->search_arg.cyl = data->seek_addr.cyl; 469f3eb5384SStefan Weinhuber data->search_arg.head = data->seek_addr.head; 470f3eb5384SStefan Weinhuber data->search_arg.record = rec_on_trk; 471f3eb5384SStefan Weinhuber } 472f3eb5384SStefan Weinhuber 473f3eb5384SStefan Weinhuber static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 474b44b0ab3SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 475f3eb5384SStefan Weinhuber struct dasd_device *basedev, struct dasd_device *startdev, 47645f186beSJan Höppner unsigned int format, unsigned int rec_on_trk, int count, 477f3eb5384SStefan Weinhuber unsigned int blksize, unsigned int tlf) 4788e09f215SStefan Weinhuber { 4798e09f215SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 480f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 48145f186beSJan Höppner struct DE_eckd_data *dedata; 4828e09f215SStefan Weinhuber int rc = 0; 4838e09f215SStefan Weinhuber 484543691a4SSebastian Ott basepriv = basedev->private; 485543691a4SSebastian Ott startpriv = startdev->private; 486f3eb5384SStefan Weinhuber dedata = &pfxdata->define_extent; 487f3eb5384SStefan Weinhuber lredata = &pfxdata->locate_record; 4888e09f215SStefan Weinhuber 4898e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PFX; 4908e09f215SStefan Weinhuber ccw->flags = 0; 491e4dbb0f2SStefan Haberland if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) { 492e4dbb0f2SStefan Haberland ccw->count = sizeof(*pfxdata) + 2; 493e4dbb0f2SStefan Haberland ccw->cda = (__u32) __pa(pfxdata); 494e4dbb0f2SStefan Haberland memset(pfxdata, 0, sizeof(*pfxdata) + 2); 495e4dbb0f2SStefan Haberland } else { 4968e09f215SStefan Weinhuber ccw->count = sizeof(*pfxdata); 4978e09f215SStefan Weinhuber ccw->cda = (__u32) __pa(pfxdata); 4988e09f215SStefan Weinhuber memset(pfxdata, 0, sizeof(*pfxdata)); 499e4dbb0f2SStefan Haberland } 500e4dbb0f2SStefan Haberland 5018e09f215SStefan Weinhuber /* prefix data */ 502f3eb5384SStefan Weinhuber if (format > 1) { 503f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 504f3eb5384SStefan Weinhuber "PFX LRE unknown format 0x%x", format); 505f3eb5384SStefan Weinhuber BUG(); 506f3eb5384SStefan Weinhuber return -EINVAL; 507f3eb5384SStefan Weinhuber } 508f3eb5384SStefan Weinhuber pfxdata->format = format; 5094abb08c2SStefan Weinhuber pfxdata->base_address = basepriv->ned->unit_addr; 5104abb08c2SStefan Weinhuber pfxdata->base_lss = basepriv->ned->ID; 511f3eb5384SStefan Weinhuber pfxdata->validity.define_extent = 1; 5128e09f215SStefan Weinhuber 5138e09f215SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 514da340f92SStefan Haberland if (startpriv->uid.type == UA_BASE_PAV_ALIAS) 5158e09f215SStefan Weinhuber pfxdata->validity.verify_base = 1; 516da340f92SStefan Haberland 517da340f92SStefan Haberland if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) { 518da340f92SStefan Haberland pfxdata->validity.verify_base = 1; 5198e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 1; 5208e09f215SStefan Weinhuber } 5218e09f215SStefan Weinhuber 52245f186beSJan Höppner rc = define_extent(NULL, dedata, trk, totrk, cmd, basedev, blksize); 5238e09f215SStefan Weinhuber 52445f186beSJan Höppner /* 52545f186beSJan Höppner * For some commands the System Time Stamp is set in the define extent 52645f186beSJan Höppner * data when XRC is supported. The validity of the time stamp must be 52745f186beSJan Höppner * reflected in the prefix data as well. 52845f186beSJan Höppner */ 52945f186beSJan Höppner if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02) 53045f186beSJan Höppner pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */ 531f3eb5384SStefan Weinhuber 532f3eb5384SStefan Weinhuber if (format == 1) { 53345f186beSJan Höppner locate_record_ext(NULL, lredata, trk, rec_on_trk, count, cmd, 534f3eb5384SStefan Weinhuber basedev, blksize, tlf); 535f3eb5384SStefan Weinhuber } 536f3eb5384SStefan Weinhuber 5378e09f215SStefan Weinhuber return rc; 5388e09f215SStefan Weinhuber } 5398e09f215SStefan Weinhuber 540f3eb5384SStefan Weinhuber static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 541f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 542f3eb5384SStefan Weinhuber struct dasd_device *basedev, struct dasd_device *startdev) 543f3eb5384SStefan Weinhuber { 544f3eb5384SStefan Weinhuber return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev, 545f3eb5384SStefan Weinhuber 0, 0, 0, 0, 0); 546f3eb5384SStefan Weinhuber } 547f3eb5384SStefan Weinhuber 5484d284cacSHeiko Carstens static void 549b44b0ab3SStefan Weinhuber locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk, 550b44b0ab3SStefan Weinhuber unsigned int rec_on_trk, int no_rec, int cmd, 5511da177e4SLinus Torvalds struct dasd_device * device, int reclen) 5521da177e4SLinus Torvalds { 553543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 5541da177e4SLinus Torvalds int sector; 5551da177e4SLinus Torvalds int dn, d; 5561da177e4SLinus Torvalds 5571da177e4SLinus Torvalds DBF_DEV_EVENT(DBF_INFO, device, 5581da177e4SLinus Torvalds "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", 5591da177e4SLinus Torvalds trk, rec_on_trk, no_rec, cmd, reclen); 5601da177e4SLinus Torvalds 5611da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; 5621da177e4SLinus Torvalds ccw->flags = 0; 5631da177e4SLinus Torvalds ccw->count = 16; 5641da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 5651da177e4SLinus Torvalds 5661da177e4SLinus Torvalds memset(data, 0, sizeof(struct LO_eckd_data)); 5671da177e4SLinus Torvalds sector = 0; 5681da177e4SLinus Torvalds if (rec_on_trk) { 5691da177e4SLinus Torvalds switch (private->rdc_data.dev_type) { 5701da177e4SLinus Torvalds case 0x3390: 5711da177e4SLinus Torvalds dn = ceil_quot(reclen + 6, 232); 5721da177e4SLinus Torvalds d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 5731da177e4SLinus Torvalds sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 5741da177e4SLinus Torvalds break; 5751da177e4SLinus Torvalds case 0x3380: 5761da177e4SLinus Torvalds d = 7 + ceil_quot(reclen + 12, 32); 5771da177e4SLinus Torvalds sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 5781da177e4SLinus Torvalds break; 5791da177e4SLinus Torvalds } 5801da177e4SLinus Torvalds } 5811da177e4SLinus Torvalds data->sector = sector; 5821da177e4SLinus Torvalds data->count = no_rec; 5831da177e4SLinus Torvalds switch (cmd) { 5841da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 5851da177e4SLinus Torvalds data->operation.orientation = 0x3; 5861da177e4SLinus Torvalds data->operation.operation = 0x03; 5871da177e4SLinus Torvalds break; 5881da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 5891da177e4SLinus Torvalds data->operation.orientation = 0x3; 5901da177e4SLinus Torvalds data->operation.operation = 0x16; 5911da177e4SLinus Torvalds break; 5921da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 5931da177e4SLinus Torvalds data->operation.orientation = 0x1; 5941da177e4SLinus Torvalds data->operation.operation = 0x03; 5951da177e4SLinus Torvalds data->count++; 5961da177e4SLinus Torvalds break; 5971da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 5981da177e4SLinus Torvalds data->operation.orientation = 0x3; 5991da177e4SLinus Torvalds data->operation.operation = 0x16; 6001da177e4SLinus Torvalds data->count++; 6011da177e4SLinus Torvalds break; 6021da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 6031da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 6041da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 6051da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 6061da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6071da177e4SLinus Torvalds data->length = reclen; 6081da177e4SLinus Torvalds data->operation.operation = 0x01; 6091da177e4SLinus Torvalds break; 6101da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 6111da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 6121da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6131da177e4SLinus Torvalds data->length = reclen; 6141da177e4SLinus Torvalds data->operation.operation = 0x03; 6151da177e4SLinus Torvalds break; 6161da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 6171da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 6181da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 6191da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 6201da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6211da177e4SLinus Torvalds data->length = reclen; 6221da177e4SLinus Torvalds data->operation.operation = 0x06; 6231da177e4SLinus Torvalds break; 6241da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 6251da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 6261da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6271da177e4SLinus Torvalds data->length = reclen; 6281da177e4SLinus Torvalds data->operation.operation = 0x16; 6291da177e4SLinus Torvalds break; 6301da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_COUNT: 6311da177e4SLinus Torvalds data->operation.operation = 0x06; 6321da177e4SLinus Torvalds break; 6331da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 6341da177e4SLinus Torvalds data->length = reclen; 6351da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6361da177e4SLinus Torvalds data->operation.operation = 0x0b; 6371da177e4SLinus Torvalds break; 6381da177e4SLinus Torvalds default: 639fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record " 640fc19f381SStefan Haberland "opcode 0x%x", cmd); 6411da177e4SLinus Torvalds } 642b44b0ab3SStefan Weinhuber set_ch_t(&data->seek_addr, 643b44b0ab3SStefan Weinhuber trk / private->rdc_data.trk_per_cyl, 644b44b0ab3SStefan Weinhuber trk % private->rdc_data.trk_per_cyl); 645b44b0ab3SStefan Weinhuber data->search_arg.cyl = data->seek_addr.cyl; 646b44b0ab3SStefan Weinhuber data->search_arg.head = data->seek_addr.head; 6471da177e4SLinus Torvalds data->search_arg.record = rec_on_trk; 6481da177e4SLinus Torvalds } 6491da177e4SLinus Torvalds 6501da177e4SLinus Torvalds /* 6511da177e4SLinus Torvalds * Returns 1 if the block is one of the special blocks that needs 6521da177e4SLinus Torvalds * to get read/written with the KD variant of the command. 6531da177e4SLinus Torvalds * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and 6541da177e4SLinus Torvalds * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. 6551da177e4SLinus Torvalds * Luckily the KD variants differ only by one bit (0x08) from the 6561da177e4SLinus Torvalds * normal variant. So don't wonder about code like: 6571da177e4SLinus Torvalds * if (dasd_eckd_cdl_special(blk_per_trk, recid)) 6581da177e4SLinus Torvalds * ccw->cmd_code |= 0x8; 6591da177e4SLinus Torvalds */ 6601da177e4SLinus Torvalds static inline int 6611da177e4SLinus Torvalds dasd_eckd_cdl_special(int blk_per_trk, int recid) 6621da177e4SLinus Torvalds { 6631da177e4SLinus Torvalds if (recid < 3) 6641da177e4SLinus Torvalds return 1; 6651da177e4SLinus Torvalds if (recid < blk_per_trk) 6661da177e4SLinus Torvalds return 0; 6671da177e4SLinus Torvalds if (recid < 2 * blk_per_trk) 6681da177e4SLinus Torvalds return 1; 6691da177e4SLinus Torvalds return 0; 6701da177e4SLinus Torvalds } 6711da177e4SLinus Torvalds 6721da177e4SLinus Torvalds /* 6731da177e4SLinus Torvalds * Returns the record size for the special blocks of the cdl format. 6741da177e4SLinus Torvalds * Only returns something useful if dasd_eckd_cdl_special is true 6751da177e4SLinus Torvalds * for the recid. 6761da177e4SLinus Torvalds */ 6771da177e4SLinus Torvalds static inline int 6781da177e4SLinus Torvalds dasd_eckd_cdl_reclen(int recid) 6791da177e4SLinus Torvalds { 6801da177e4SLinus Torvalds if (recid < 3) 6811da177e4SLinus Torvalds return sizes_trk0[recid]; 6821da177e4SLinus Torvalds return LABEL_SIZE; 6831da177e4SLinus Torvalds } 684b206181dSStefan Haberland /* create unique id from private structure. */ 685b206181dSStefan Haberland static void create_uid(struct dasd_eckd_private *private) 6863d052595SHorst Hummel { 6874abb08c2SStefan Weinhuber int count; 688b206181dSStefan Haberland struct dasd_uid *uid; 6893d052595SHorst Hummel 6902dedf0d9SStefan Haberland uid = &private->uid; 6913d052595SHorst Hummel memset(uid, 0, sizeof(struct dasd_uid)); 6924abb08c2SStefan Weinhuber memcpy(uid->vendor, private->ned->HDA_manufacturer, 6933d052595SHorst Hummel sizeof(uid->vendor) - 1); 6943d052595SHorst Hummel EBCASC(uid->vendor, sizeof(uid->vendor) - 1); 6954abb08c2SStefan Weinhuber memcpy(uid->serial, private->ned->HDA_location, 6963d052595SHorst Hummel sizeof(uid->serial) - 1); 6973d052595SHorst Hummel EBCASC(uid->serial, sizeof(uid->serial) - 1); 6984abb08c2SStefan Weinhuber uid->ssid = private->gneq->subsystemID; 699a419aef8SJoe Perches uid->real_unit_addr = private->ned->unit_addr; 7004abb08c2SStefan Weinhuber if (private->sneq) { 7014abb08c2SStefan Weinhuber uid->type = private->sneq->sua_flags; 7028e09f215SStefan Weinhuber if (uid->type == UA_BASE_PAV_ALIAS) 7034abb08c2SStefan Weinhuber uid->base_unit_addr = private->sneq->base_unit_addr; 7048e09f215SStefan Weinhuber } else { 7058e09f215SStefan Weinhuber uid->type = UA_BASE_DEVICE; 7068e09f215SStefan Weinhuber } 7074abb08c2SStefan Weinhuber if (private->vdsneq) { 7084abb08c2SStefan Weinhuber for (count = 0; count < 16; count++) { 7094abb08c2SStefan Weinhuber sprintf(uid->vduit+2*count, "%02x", 7104abb08c2SStefan Weinhuber private->vdsneq->uit[count]); 7114abb08c2SStefan Weinhuber } 7124abb08c2SStefan Weinhuber } 713b206181dSStefan Haberland } 714b206181dSStefan Haberland 715b206181dSStefan Haberland /* 716b206181dSStefan Haberland * Generate device unique id that specifies the physical device. 717b206181dSStefan Haberland */ 718b206181dSStefan Haberland static int dasd_eckd_generate_uid(struct dasd_device *device) 719b206181dSStefan Haberland { 720543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 721b206181dSStefan Haberland unsigned long flags; 722b206181dSStefan Haberland 723b206181dSStefan Haberland if (!private) 724b206181dSStefan Haberland return -ENODEV; 725b206181dSStefan Haberland if (!private->ned || !private->gneq) 726b206181dSStefan Haberland return -ENODEV; 727b206181dSStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 728b206181dSStefan Haberland create_uid(private); 7292dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 7303d052595SHorst Hummel return 0; 7313d052595SHorst Hummel } 7323d052595SHorst Hummel 7332dedf0d9SStefan Haberland static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid) 7342dedf0d9SStefan Haberland { 735543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 7362dedf0d9SStefan Haberland unsigned long flags; 7372dedf0d9SStefan Haberland 738543691a4SSebastian Ott if (private) { 7392dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 7402dedf0d9SStefan Haberland *uid = private->uid; 7412dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 7422dedf0d9SStefan Haberland return 0; 7432dedf0d9SStefan Haberland } 7442dedf0d9SStefan Haberland return -EINVAL; 7452dedf0d9SStefan Haberland } 7462dedf0d9SStefan Haberland 747b206181dSStefan Haberland /* 748b206181dSStefan Haberland * compare device UID with data of a given dasd_eckd_private structure 749b206181dSStefan Haberland * return 0 for match 750b206181dSStefan Haberland */ 751b206181dSStefan Haberland static int dasd_eckd_compare_path_uid(struct dasd_device *device, 752b206181dSStefan Haberland struct dasd_eckd_private *private) 753b206181dSStefan Haberland { 754b206181dSStefan Haberland struct dasd_uid device_uid; 755b206181dSStefan Haberland 756b206181dSStefan Haberland create_uid(private); 757b206181dSStefan Haberland dasd_eckd_get_uid(device, &device_uid); 758b206181dSStefan Haberland 759b206181dSStefan Haberland return memcmp(&device_uid, &private->uid, sizeof(struct dasd_uid)); 760b206181dSStefan Haberland } 761b206181dSStefan Haberland 762a4d26c6aSStefan Weinhuber static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device, 763a4d26c6aSStefan Weinhuber struct dasd_ccw_req *cqr, 764a4d26c6aSStefan Weinhuber __u8 *rcd_buffer, 765a4d26c6aSStefan Weinhuber __u8 lpm) 76617283b56SCornelia Huck { 76717283b56SCornelia Huck struct ccw1 *ccw; 768a4d26c6aSStefan Weinhuber /* 769a4d26c6aSStefan Weinhuber * buffer has to start with EBCDIC "V1.0" to show 770a4d26c6aSStefan Weinhuber * support for virtual device SNEQ 771a4d26c6aSStefan Weinhuber */ 772a4d26c6aSStefan Weinhuber rcd_buffer[0] = 0xE5; 773a4d26c6aSStefan Weinhuber rcd_buffer[1] = 0xF1; 774a4d26c6aSStefan Weinhuber rcd_buffer[2] = 0x4B; 775a4d26c6aSStefan Weinhuber rcd_buffer[3] = 0xF0; 77617283b56SCornelia Huck 77717283b56SCornelia Huck ccw = cqr->cpaddr; 778a4d26c6aSStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RCD; 779a4d26c6aSStefan Weinhuber ccw->flags = 0; 78017283b56SCornelia Huck ccw->cda = (__u32)(addr_t)rcd_buffer; 781a4d26c6aSStefan Weinhuber ccw->count = DASD_ECKD_RCD_DATA_SIZE; 782a4d26c6aSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 78317283b56SCornelia Huck 7848e09f215SStefan Weinhuber cqr->startdev = device; 7858e09f215SStefan Weinhuber cqr->memdev = device; 7868e09f215SStefan Weinhuber cqr->block = NULL; 78717283b56SCornelia Huck cqr->expires = 10*HZ; 78817283b56SCornelia Huck cqr->lpm = lpm; 789eb6e199bSStefan Weinhuber cqr->retries = 256; 7901aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 79117283b56SCornelia Huck cqr->status = DASD_CQR_FILLED; 792a4d26c6aSStefan Weinhuber set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 793a4d26c6aSStefan Weinhuber } 794a4d26c6aSStefan Weinhuber 7955915a873SStefan Haberland /* 7965915a873SStefan Haberland * Wakeup helper for read_conf 7975915a873SStefan Haberland * if the cqr is not done and needs some error recovery 7985915a873SStefan Haberland * the buffer has to be re-initialized with the EBCDIC "V1.0" 7995915a873SStefan Haberland * to show support for virtual device SNEQ 8005915a873SStefan Haberland */ 8015915a873SStefan Haberland static void read_conf_cb(struct dasd_ccw_req *cqr, void *data) 8025915a873SStefan Haberland { 8035915a873SStefan Haberland struct ccw1 *ccw; 8045915a873SStefan Haberland __u8 *rcd_buffer; 8055915a873SStefan Haberland 8065915a873SStefan Haberland if (cqr->status != DASD_CQR_DONE) { 8075915a873SStefan Haberland ccw = cqr->cpaddr; 8085915a873SStefan Haberland rcd_buffer = (__u8 *)((addr_t) ccw->cda); 8095915a873SStefan Haberland memset(rcd_buffer, 0, sizeof(*rcd_buffer)); 8105915a873SStefan Haberland 8115915a873SStefan Haberland rcd_buffer[0] = 0xE5; 8125915a873SStefan Haberland rcd_buffer[1] = 0xF1; 8135915a873SStefan Haberland rcd_buffer[2] = 0x4B; 8145915a873SStefan Haberland rcd_buffer[3] = 0xF0; 8155915a873SStefan Haberland } 8165915a873SStefan Haberland dasd_wakeup_cb(cqr, data); 8175915a873SStefan Haberland } 8185915a873SStefan Haberland 819a4d26c6aSStefan Weinhuber static int dasd_eckd_read_conf_immediately(struct dasd_device *device, 820a4d26c6aSStefan Weinhuber struct dasd_ccw_req *cqr, 821a4d26c6aSStefan Weinhuber __u8 *rcd_buffer, 822a4d26c6aSStefan Weinhuber __u8 lpm) 823a4d26c6aSStefan Weinhuber { 824a4d26c6aSStefan Weinhuber struct ciw *ciw; 825a4d26c6aSStefan Weinhuber int rc; 826a4d26c6aSStefan Weinhuber /* 827a4d26c6aSStefan Weinhuber * sanity check: scan for RCD command in extended SenseID data 828a4d26c6aSStefan Weinhuber * some devices do not support RCD 829a4d26c6aSStefan Weinhuber */ 830a4d26c6aSStefan Weinhuber ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 831a4d26c6aSStefan Weinhuber if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) 832a4d26c6aSStefan Weinhuber return -EOPNOTSUPP; 833a4d26c6aSStefan Weinhuber 834a4d26c6aSStefan Weinhuber dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm); 835a4d26c6aSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 8365a27e60dSStefan Weinhuber set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 837a4d26c6aSStefan Weinhuber cqr->retries = 5; 8385915a873SStefan Haberland cqr->callback = read_conf_cb; 839a4d26c6aSStefan Weinhuber rc = dasd_sleep_on_immediatly(cqr); 840a4d26c6aSStefan Weinhuber return rc; 84117283b56SCornelia Huck } 84217283b56SCornelia Huck 84317283b56SCornelia Huck static int dasd_eckd_read_conf_lpm(struct dasd_device *device, 84417283b56SCornelia Huck void **rcd_buffer, 84517283b56SCornelia Huck int *rcd_buffer_size, __u8 lpm) 84617283b56SCornelia Huck { 84717283b56SCornelia Huck struct ciw *ciw; 84817283b56SCornelia Huck char *rcd_buf = NULL; 84917283b56SCornelia Huck int ret; 85017283b56SCornelia Huck struct dasd_ccw_req *cqr; 85117283b56SCornelia Huck 85217283b56SCornelia Huck /* 853a4d26c6aSStefan Weinhuber * sanity check: scan for RCD command in extended SenseID data 854a4d26c6aSStefan Weinhuber * some devices do not support RCD 85517283b56SCornelia Huck */ 85617283b56SCornelia Huck ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 857a4d26c6aSStefan Weinhuber if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) { 85817283b56SCornelia Huck ret = -EOPNOTSUPP; 85917283b56SCornelia Huck goto out_error; 86017283b56SCornelia Huck } 861a4d26c6aSStefan Weinhuber rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA); 86217283b56SCornelia Huck if (!rcd_buf) { 86317283b56SCornelia Huck ret = -ENOMEM; 86417283b56SCornelia Huck goto out_error; 86517283b56SCornelia Huck } 866a4d26c6aSStefan Weinhuber cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, 867a4d26c6aSStefan Weinhuber 0, /* use rcd_buf as data ara */ 868c5205f2fSSebastian Ott device, NULL); 86917283b56SCornelia Huck if (IS_ERR(cqr)) { 870a4d26c6aSStefan Weinhuber DBF_DEV_EVENT(DBF_WARNING, device, "%s", 871a4d26c6aSStefan Weinhuber "Could not allocate RCD request"); 872a4d26c6aSStefan Weinhuber ret = -ENOMEM; 87317283b56SCornelia Huck goto out_error; 87417283b56SCornelia Huck } 875a4d26c6aSStefan Weinhuber dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm); 8765915a873SStefan Haberland cqr->callback = read_conf_cb; 87717283b56SCornelia Huck ret = dasd_sleep_on(cqr); 87817283b56SCornelia Huck /* 87917283b56SCornelia Huck * on success we update the user input parms 88017283b56SCornelia Huck */ 8818e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 88217283b56SCornelia Huck if (ret) 88317283b56SCornelia Huck goto out_error; 88417283b56SCornelia Huck 885a4d26c6aSStefan Weinhuber *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE; 88617283b56SCornelia Huck *rcd_buffer = rcd_buf; 88717283b56SCornelia Huck return 0; 88817283b56SCornelia Huck out_error: 88917283b56SCornelia Huck kfree(rcd_buf); 89017283b56SCornelia Huck *rcd_buffer = NULL; 89117283b56SCornelia Huck *rcd_buffer_size = 0; 89217283b56SCornelia Huck return ret; 89317283b56SCornelia Huck } 89417283b56SCornelia Huck 8954abb08c2SStefan Weinhuber static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private) 8964abb08c2SStefan Weinhuber { 8974abb08c2SStefan Weinhuber 8984abb08c2SStefan Weinhuber struct dasd_sneq *sneq; 8994abb08c2SStefan Weinhuber int i, count; 9004abb08c2SStefan Weinhuber 9014abb08c2SStefan Weinhuber private->ned = NULL; 9024abb08c2SStefan Weinhuber private->sneq = NULL; 9034abb08c2SStefan Weinhuber private->vdsneq = NULL; 9044abb08c2SStefan Weinhuber private->gneq = NULL; 9054abb08c2SStefan Weinhuber count = private->conf_len / sizeof(struct dasd_sneq); 9064abb08c2SStefan Weinhuber sneq = (struct dasd_sneq *)private->conf_data; 9074abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 9084abb08c2SStefan Weinhuber if (sneq->flags.identifier == 1 && sneq->format == 1) 9094abb08c2SStefan Weinhuber private->sneq = sneq; 9104abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 1 && sneq->format == 4) 9114abb08c2SStefan Weinhuber private->vdsneq = (struct vd_sneq *)sneq; 9124abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 2) 9134abb08c2SStefan Weinhuber private->gneq = (struct dasd_gneq *)sneq; 9144abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 3 && sneq->res1 == 1) 9154abb08c2SStefan Weinhuber private->ned = (struct dasd_ned *)sneq; 9164abb08c2SStefan Weinhuber sneq++; 9174abb08c2SStefan Weinhuber } 9184abb08c2SStefan Weinhuber if (!private->ned || !private->gneq) { 9194abb08c2SStefan Weinhuber private->ned = NULL; 9204abb08c2SStefan Weinhuber private->sneq = NULL; 9214abb08c2SStefan Weinhuber private->vdsneq = NULL; 9224abb08c2SStefan Weinhuber private->gneq = NULL; 9234abb08c2SStefan Weinhuber return -EINVAL; 9244abb08c2SStefan Weinhuber } 9254abb08c2SStefan Weinhuber return 0; 9264abb08c2SStefan Weinhuber 9274abb08c2SStefan Weinhuber }; 9284abb08c2SStefan Weinhuber 9294abb08c2SStefan Weinhuber static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len) 9304abb08c2SStefan Weinhuber { 9314abb08c2SStefan Weinhuber struct dasd_gneq *gneq; 9324abb08c2SStefan Weinhuber int i, count, found; 9334abb08c2SStefan Weinhuber 9344abb08c2SStefan Weinhuber count = conf_len / sizeof(*gneq); 9354abb08c2SStefan Weinhuber gneq = (struct dasd_gneq *)conf_data; 9364abb08c2SStefan Weinhuber found = 0; 9374abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 9384abb08c2SStefan Weinhuber if (gneq->flags.identifier == 2) { 9394abb08c2SStefan Weinhuber found = 1; 9404abb08c2SStefan Weinhuber break; 9414abb08c2SStefan Weinhuber } 9424abb08c2SStefan Weinhuber gneq++; 9434abb08c2SStefan Weinhuber } 9444abb08c2SStefan Weinhuber if (found) 9454abb08c2SStefan Weinhuber return ((char *)gneq)[18] & 0x07; 9464abb08c2SStefan Weinhuber else 9474abb08c2SStefan Weinhuber return 0; 9484abb08c2SStefan Weinhuber } 9494abb08c2SStefan Weinhuber 950c7c0c9deSStefan Haberland static void dasd_eckd_clear_conf_data(struct dasd_device *device) 951c7c0c9deSStefan Haberland { 952543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 953c7c0c9deSStefan Haberland int i; 954c7c0c9deSStefan Haberland 955c7c0c9deSStefan Haberland private->conf_data = NULL; 956c7c0c9deSStefan Haberland private->conf_len = 0; 957c7c0c9deSStefan Haberland for (i = 0; i < 8; i++) { 958c9346151SStefan Haberland kfree(device->path[i].conf_data); 959c9346151SStefan Haberland device->path[i].conf_data = NULL; 960a521b048SStefan Haberland device->path[i].cssid = 0; 961a521b048SStefan Haberland device->path[i].ssid = 0; 962a521b048SStefan Haberland device->path[i].chpid = 0; 963c7c0c9deSStefan Haberland } 964c7c0c9deSStefan Haberland } 965c7c0c9deSStefan Haberland 966c7c0c9deSStefan Haberland 9674abb08c2SStefan Weinhuber static int dasd_eckd_read_conf(struct dasd_device *device) 9681da177e4SLinus Torvalds { 9691da177e4SLinus Torvalds void *conf_data; 9701da177e4SLinus Torvalds int conf_len, conf_data_saved; 971b179b037SStefan Haberland int rc, path_err, pos; 972a4d26c6aSStefan Weinhuber __u8 lpm, opm; 973b206181dSStefan Haberland struct dasd_eckd_private *private, path_private; 974b206181dSStefan Haberland struct dasd_uid *uid; 975b206181dSStefan Haberland char print_path_uid[60], print_device_uid[60]; 976ded27d8dSSebastian Ott struct channel_path_desc_fmt0 *chp_desc; 977a521b048SStefan Haberland struct subchannel_id sch_id; 9781da177e4SLinus Torvalds 979543691a4SSebastian Ott private = device->private; 980a4d26c6aSStefan Weinhuber opm = ccw_device_get_path_mask(device->cdev); 981a521b048SStefan Haberland ccw_device_get_schid(device->cdev, &sch_id); 9821da177e4SLinus Torvalds conf_data_saved = 0; 98355d3a85cSStefan Haberland path_err = 0; 9841da177e4SLinus Torvalds /* get configuration data per operational path */ 9851da177e4SLinus Torvalds for (lpm = 0x80; lpm; lpm>>= 1) { 986b206181dSStefan Haberland if (!(lpm & opm)) 987b206181dSStefan Haberland continue; 98817283b56SCornelia Huck rc = dasd_eckd_read_conf_lpm(device, &conf_data, 9891da177e4SLinus Torvalds &conf_len, lpm); 9901da177e4SLinus Torvalds if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ 991b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 9921da177e4SLinus Torvalds "Read configuration data returned " 993b8ed5dd5SStefan Haberland "error %d", rc); 9941da177e4SLinus Torvalds return rc; 9951da177e4SLinus Torvalds } 9961da177e4SLinus Torvalds if (conf_data == NULL) { 997b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 998b8ed5dd5SStefan Haberland "No configuration data " 999b8ed5dd5SStefan Haberland "retrieved"); 1000a4d26c6aSStefan Weinhuber /* no further analysis possible */ 1001c9346151SStefan Haberland dasd_path_add_opm(device, opm); 1002d133a960SGabriel Craciunescu continue; /* no error */ 10031da177e4SLinus Torvalds } 10041da177e4SLinus Torvalds /* save first valid configuration data */ 10051da177e4SLinus Torvalds if (!conf_data_saved) { 1006c7c0c9deSStefan Haberland /* initially clear previously stored conf_data */ 1007c7c0c9deSStefan Haberland dasd_eckd_clear_conf_data(device); 10084abb08c2SStefan Weinhuber private->conf_data = conf_data; 10094abb08c2SStefan Weinhuber private->conf_len = conf_len; 10104abb08c2SStefan Weinhuber if (dasd_eckd_identify_conf_parts(private)) { 10114abb08c2SStefan Weinhuber private->conf_data = NULL; 10124abb08c2SStefan Weinhuber private->conf_len = 0; 10134abb08c2SStefan Weinhuber kfree(conf_data); 10144abb08c2SStefan Weinhuber continue; 10154abb08c2SStefan Weinhuber } 1016c7c0c9deSStefan Haberland pos = pathmask_to_pos(lpm); 1017c7c0c9deSStefan Haberland /* store per path conf_data */ 1018c9346151SStefan Haberland device->path[pos].conf_data = conf_data; 1019a521b048SStefan Haberland device->path[pos].cssid = sch_id.cssid; 1020a521b048SStefan Haberland device->path[pos].ssid = sch_id.ssid; 1021a521b048SStefan Haberland chp_desc = ccw_device_get_chp_desc(device->cdev, pos); 1022a521b048SStefan Haberland if (chp_desc) 1023a521b048SStefan Haberland device->path[pos].chpid = chp_desc->chpid; 1024a521b048SStefan Haberland kfree(chp_desc); 1025b206181dSStefan Haberland /* 1026b206181dSStefan Haberland * build device UID that other path data 1027b206181dSStefan Haberland * can be compared to it 1028b206181dSStefan Haberland */ 1029b206181dSStefan Haberland dasd_eckd_generate_uid(device); 10301da177e4SLinus Torvalds conf_data_saved++; 1031b206181dSStefan Haberland } else { 1032b206181dSStefan Haberland path_private.conf_data = conf_data; 1033b206181dSStefan Haberland path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1034b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts( 1035b206181dSStefan Haberland &path_private)) { 1036b206181dSStefan Haberland path_private.conf_data = NULL; 1037b206181dSStefan Haberland path_private.conf_len = 0; 1038b206181dSStefan Haberland kfree(conf_data); 1039b206181dSStefan Haberland continue; 1040b206181dSStefan Haberland } 1041b206181dSStefan Haberland if (dasd_eckd_compare_path_uid( 1042b206181dSStefan Haberland device, &path_private)) { 1043b206181dSStefan Haberland uid = &path_private.uid; 1044b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1045b206181dSStefan Haberland snprintf(print_path_uid, 1046b206181dSStefan Haberland sizeof(print_path_uid), 1047b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1048b206181dSStefan Haberland uid->vendor, uid->serial, 1049b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1050b206181dSStefan Haberland uid->vduit); 1051b206181dSStefan Haberland else 1052b206181dSStefan Haberland snprintf(print_path_uid, 1053b206181dSStefan Haberland sizeof(print_path_uid), 1054b206181dSStefan Haberland "%s.%s.%04x.%02x", 1055b206181dSStefan Haberland uid->vendor, uid->serial, 1056b206181dSStefan Haberland uid->ssid, 1057b206181dSStefan Haberland uid->real_unit_addr); 1058b206181dSStefan Haberland uid = &private->uid; 1059b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1060b206181dSStefan Haberland snprintf(print_device_uid, 1061b206181dSStefan Haberland sizeof(print_device_uid), 1062b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1063b206181dSStefan Haberland uid->vendor, uid->serial, 1064b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1065b206181dSStefan Haberland uid->vduit); 1066b206181dSStefan Haberland else 1067b206181dSStefan Haberland snprintf(print_device_uid, 1068b206181dSStefan Haberland sizeof(print_device_uid), 1069b206181dSStefan Haberland "%s.%s.%04x.%02x", 1070b206181dSStefan Haberland uid->vendor, uid->serial, 1071b206181dSStefan Haberland uid->ssid, 1072b206181dSStefan Haberland uid->real_unit_addr); 1073b206181dSStefan Haberland dev_err(&device->cdev->dev, 1074b206181dSStefan Haberland "Not all channel paths lead to " 1075b206181dSStefan Haberland "the same device, path %02X leads to " 1076b206181dSStefan Haberland "device %s instead of %s\n", lpm, 1077b206181dSStefan Haberland print_path_uid, print_device_uid); 107855d3a85cSStefan Haberland path_err = -EINVAL; 1079c9346151SStefan Haberland dasd_path_add_cablepm(device, lpm); 108055d3a85cSStefan Haberland continue; 1081b206181dSStefan Haberland } 1082c7c0c9deSStefan Haberland pos = pathmask_to_pos(lpm); 1083c7c0c9deSStefan Haberland /* store per path conf_data */ 1084c9346151SStefan Haberland device->path[pos].conf_data = conf_data; 1085a521b048SStefan Haberland device->path[pos].cssid = sch_id.cssid; 1086a521b048SStefan Haberland device->path[pos].ssid = sch_id.ssid; 1087a521b048SStefan Haberland chp_desc = ccw_device_get_chp_desc(device->cdev, pos); 1088a521b048SStefan Haberland if (chp_desc) 1089a521b048SStefan Haberland device->path[pos].chpid = chp_desc->chpid; 1090a521b048SStefan Haberland kfree(chp_desc); 1091b206181dSStefan Haberland path_private.conf_data = NULL; 1092b206181dSStefan Haberland path_private.conf_len = 0; 10931da177e4SLinus Torvalds } 10944abb08c2SStefan Weinhuber switch (dasd_eckd_path_access(conf_data, conf_len)) { 10951da177e4SLinus Torvalds case 0x02: 1096c9346151SStefan Haberland dasd_path_add_nppm(device, lpm); 10971da177e4SLinus Torvalds break; 10981da177e4SLinus Torvalds case 0x03: 1099c9346151SStefan Haberland dasd_path_add_ppm(device, lpm); 11001da177e4SLinus Torvalds break; 11011da177e4SLinus Torvalds } 1102c9346151SStefan Haberland if (!dasd_path_get_opm(device)) { 1103c9346151SStefan Haberland dasd_path_set_opm(device, lpm); 1104ccc0e7dcSStefan Haberland dasd_generic_path_operational(device); 1105ccc0e7dcSStefan Haberland } else { 1106c9346151SStefan Haberland dasd_path_add_opm(device, lpm); 1107ccc0e7dcSStefan Haberland } 11081da177e4SLinus Torvalds } 1109b206181dSStefan Haberland 111055d3a85cSStefan Haberland return path_err; 11111da177e4SLinus Torvalds } 11121da177e4SLinus Torvalds 1113a521b048SStefan Haberland static u32 get_fcx_max_data(struct dasd_device *device) 1114a521b048SStefan Haberland { 1115a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 1116a521b048SStefan Haberland int fcx_in_css, fcx_in_gneq, fcx_in_features; 1117a521b048SStefan Haberland int tpm, mdc; 1118a521b048SStefan Haberland 1119a521b048SStefan Haberland if (dasd_nofcx) 1120a521b048SStefan Haberland return 0; 1121a521b048SStefan Haberland /* is transport mode supported? */ 1122a521b048SStefan Haberland fcx_in_css = css_general_characteristics.fcx; 1123a521b048SStefan Haberland fcx_in_gneq = private->gneq->reserved2[7] & 0x04; 1124a521b048SStefan Haberland fcx_in_features = private->features.feature[40] & 0x80; 1125a521b048SStefan Haberland tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; 1126a521b048SStefan Haberland 1127a521b048SStefan Haberland if (!tpm) 1128a521b048SStefan Haberland return 0; 1129a521b048SStefan Haberland 1130a521b048SStefan Haberland mdc = ccw_device_get_mdc(device->cdev, 0); 1131a521b048SStefan Haberland if (mdc < 0) { 1132a521b048SStefan Haberland dev_warn(&device->cdev->dev, "Detecting the maximum supported data size for zHPF requests failed\n"); 1133a521b048SStefan Haberland return 0; 1134a521b048SStefan Haberland } else { 1135a521b048SStefan Haberland return (u32)mdc * FCX_MAX_DATA_FACTOR; 1136a521b048SStefan Haberland } 1137a521b048SStefan Haberland } 1138a521b048SStefan Haberland 1139a4d26c6aSStefan Weinhuber static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm) 1140a4d26c6aSStefan Weinhuber { 1141543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1142a4d26c6aSStefan Weinhuber int mdc; 1143a4d26c6aSStefan Weinhuber u32 fcx_max_data; 1144a4d26c6aSStefan Weinhuber 1145a4d26c6aSStefan Weinhuber if (private->fcx_max_data) { 1146a4d26c6aSStefan Weinhuber mdc = ccw_device_get_mdc(device->cdev, lpm); 1147a4d26c6aSStefan Weinhuber if ((mdc < 0)) { 1148a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1149a4d26c6aSStefan Weinhuber "Detecting the maximum data size for zHPF " 1150a4d26c6aSStefan Weinhuber "requests failed (rc=%d) for a new path %x\n", 1151a4d26c6aSStefan Weinhuber mdc, lpm); 1152a4d26c6aSStefan Weinhuber return mdc; 1153a4d26c6aSStefan Weinhuber } 11540f02c4e7SChristian Borntraeger fcx_max_data = (u32)mdc * FCX_MAX_DATA_FACTOR; 1155a4d26c6aSStefan Weinhuber if (fcx_max_data < private->fcx_max_data) { 1156a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1157a4d26c6aSStefan Weinhuber "The maximum data size for zHPF requests %u " 1158a4d26c6aSStefan Weinhuber "on a new path %x is below the active maximum " 1159a4d26c6aSStefan Weinhuber "%u\n", fcx_max_data, lpm, 1160a4d26c6aSStefan Weinhuber private->fcx_max_data); 1161a4d26c6aSStefan Weinhuber return -EACCES; 1162a4d26c6aSStefan Weinhuber } 1163a4d26c6aSStefan Weinhuber } 1164a4d26c6aSStefan Weinhuber return 0; 1165a4d26c6aSStefan Weinhuber } 1166a4d26c6aSStefan Weinhuber 1167b206181dSStefan Haberland static int rebuild_device_uid(struct dasd_device *device, 1168b206181dSStefan Haberland struct path_verification_work_data *data) 1169b206181dSStefan Haberland { 1170543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1171c9346151SStefan Haberland __u8 lpm, opm = dasd_path_get_opm(device); 1172543691a4SSebastian Ott int rc = -ENODEV; 1173b206181dSStefan Haberland 1174b206181dSStefan Haberland for (lpm = 0x80; lpm; lpm >>= 1) { 1175b206181dSStefan Haberland if (!(lpm & opm)) 1176b206181dSStefan Haberland continue; 1177b206181dSStefan Haberland memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1178b206181dSStefan Haberland memset(&data->cqr, 0, sizeof(data->cqr)); 1179b206181dSStefan Haberland data->cqr.cpaddr = &data->ccw; 1180b206181dSStefan Haberland rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1181b206181dSStefan Haberland data->rcd_buffer, 1182b206181dSStefan Haberland lpm); 1183b206181dSStefan Haberland 1184b206181dSStefan Haberland if (rc) { 1185b206181dSStefan Haberland if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */ 1186b206181dSStefan Haberland continue; 1187b206181dSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1188b206181dSStefan Haberland "Read configuration data " 1189b206181dSStefan Haberland "returned error %d", rc); 1190b206181dSStefan Haberland break; 1191b206181dSStefan Haberland } 1192b206181dSStefan Haberland memcpy(private->conf_data, data->rcd_buffer, 1193b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE); 1194b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts(private)) { 1195b206181dSStefan Haberland rc = -ENODEV; 1196b206181dSStefan Haberland } else /* first valid path is enough */ 1197b206181dSStefan Haberland break; 1198b206181dSStefan Haberland } 1199b206181dSStefan Haberland 1200b206181dSStefan Haberland if (!rc) 1201b206181dSStefan Haberland rc = dasd_eckd_generate_uid(device); 1202b206181dSStefan Haberland 1203b206181dSStefan Haberland return rc; 1204b206181dSStefan Haberland } 1205b206181dSStefan Haberland 1206a4d26c6aSStefan Weinhuber static void do_path_verification_work(struct work_struct *work) 1207a4d26c6aSStefan Weinhuber { 1208a4d26c6aSStefan Weinhuber struct path_verification_work_data *data; 1209a4d26c6aSStefan Weinhuber struct dasd_device *device; 1210b206181dSStefan Haberland struct dasd_eckd_private path_private; 1211b206181dSStefan Haberland struct dasd_uid *uid; 1212b206181dSStefan Haberland __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE]; 12135db8440cSStefan Haberland __u8 lpm, opm, npm, ppm, epm, hpfpm, cablepm; 1214a4d26c6aSStefan Weinhuber unsigned long flags; 1215b206181dSStefan Haberland char print_uid[60]; 1216a4d26c6aSStefan Weinhuber int rc; 1217a4d26c6aSStefan Weinhuber 1218a4d26c6aSStefan Weinhuber data = container_of(work, struct path_verification_work_data, worker); 1219a4d26c6aSStefan Weinhuber device = data->device; 1220a4d26c6aSStefan Weinhuber 1221c8d1c0ffSStefan Haberland /* delay path verification until device was resumed */ 1222c8d1c0ffSStefan Haberland if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 1223c8d1c0ffSStefan Haberland schedule_work(work); 1224c8d1c0ffSStefan Haberland return; 1225c8d1c0ffSStefan Haberland } 12261eb38023SStefan Haberland /* check if path verification already running and delay if so */ 12271eb38023SStefan Haberland if (test_and_set_bit(DASD_FLAG_PATH_VERIFY, &device->flags)) { 12281eb38023SStefan Haberland schedule_work(work); 12291eb38023SStefan Haberland return; 12301eb38023SStefan Haberland } 1231a4d26c6aSStefan Weinhuber opm = 0; 1232a4d26c6aSStefan Weinhuber npm = 0; 1233a4d26c6aSStefan Weinhuber ppm = 0; 1234a4d26c6aSStefan Weinhuber epm = 0; 12355db8440cSStefan Haberland hpfpm = 0; 12365db8440cSStefan Haberland cablepm = 0; 12375db8440cSStefan Haberland 1238a4d26c6aSStefan Weinhuber for (lpm = 0x80; lpm; lpm >>= 1) { 1239b206181dSStefan Haberland if (!(lpm & data->tbvpm)) 1240b206181dSStefan Haberland continue; 1241b206181dSStefan Haberland memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1242a4d26c6aSStefan Weinhuber memset(&data->cqr, 0, sizeof(data->cqr)); 1243a4d26c6aSStefan Weinhuber data->cqr.cpaddr = &data->ccw; 1244a4d26c6aSStefan Weinhuber rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1245a4d26c6aSStefan Weinhuber data->rcd_buffer, 1246a4d26c6aSStefan Weinhuber lpm); 1247a4d26c6aSStefan Weinhuber if (!rc) { 1248a4d26c6aSStefan Weinhuber switch (dasd_eckd_path_access(data->rcd_buffer, 1249b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE) 1250b206181dSStefan Haberland ) { 1251a4d26c6aSStefan Weinhuber case 0x02: 1252a4d26c6aSStefan Weinhuber npm |= lpm; 1253a4d26c6aSStefan Weinhuber break; 1254a4d26c6aSStefan Weinhuber case 0x03: 1255a4d26c6aSStefan Weinhuber ppm |= lpm; 1256a4d26c6aSStefan Weinhuber break; 1257a4d26c6aSStefan Weinhuber } 1258a4d26c6aSStefan Weinhuber opm |= lpm; 1259a4d26c6aSStefan Weinhuber } else if (rc == -EOPNOTSUPP) { 1260a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1261a4d26c6aSStefan Weinhuber "path verification: No configuration " 1262a4d26c6aSStefan Weinhuber "data retrieved"); 1263a4d26c6aSStefan Weinhuber opm |= lpm; 1264a4d26c6aSStefan Weinhuber } else if (rc == -EAGAIN) { 1265a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1266a4d26c6aSStefan Weinhuber "path verification: device is stopped," 1267a4d26c6aSStefan Weinhuber " try again later"); 1268a4d26c6aSStefan Weinhuber epm |= lpm; 1269a4d26c6aSStefan Weinhuber } else { 1270a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1271a4d26c6aSStefan Weinhuber "Reading device feature codes failed " 1272a4d26c6aSStefan Weinhuber "(rc=%d) for new path %x\n", rc, lpm); 1273a4d26c6aSStefan Weinhuber continue; 1274a4d26c6aSStefan Weinhuber } 1275a4d26c6aSStefan Weinhuber if (verify_fcx_max_data(device, lpm)) { 1276a4d26c6aSStefan Weinhuber opm &= ~lpm; 1277a4d26c6aSStefan Weinhuber npm &= ~lpm; 1278a4d26c6aSStefan Weinhuber ppm &= ~lpm; 12795db8440cSStefan Haberland hpfpm |= lpm; 1280b206181dSStefan Haberland continue; 1281b206181dSStefan Haberland } 1282b206181dSStefan Haberland 1283b206181dSStefan Haberland /* 1284b206181dSStefan Haberland * save conf_data for comparison after 1285b206181dSStefan Haberland * rebuild_device_uid may have changed 1286b206181dSStefan Haberland * the original data 1287b206181dSStefan Haberland */ 1288b206181dSStefan Haberland memcpy(&path_rcd_buf, data->rcd_buffer, 1289b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE); 1290b206181dSStefan Haberland path_private.conf_data = (void *) &path_rcd_buf; 1291b206181dSStefan Haberland path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1292b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts(&path_private)) { 1293b206181dSStefan Haberland path_private.conf_data = NULL; 1294b206181dSStefan Haberland path_private.conf_len = 0; 1295b206181dSStefan Haberland continue; 1296b206181dSStefan Haberland } 1297b206181dSStefan Haberland 1298b206181dSStefan Haberland /* 1299b206181dSStefan Haberland * compare path UID with device UID only if at least 1300b206181dSStefan Haberland * one valid path is left 1301b206181dSStefan Haberland * in other case the device UID may have changed and 1302b206181dSStefan Haberland * the first working path UID will be used as device UID 1303b206181dSStefan Haberland */ 1304c9346151SStefan Haberland if (dasd_path_get_opm(device) && 1305b206181dSStefan Haberland dasd_eckd_compare_path_uid(device, &path_private)) { 1306b206181dSStefan Haberland /* 1307b206181dSStefan Haberland * the comparison was not successful 1308b206181dSStefan Haberland * rebuild the device UID with at least one 1309b206181dSStefan Haberland * known path in case a z/VM hyperswap command 1310b206181dSStefan Haberland * has changed the device 1311b206181dSStefan Haberland * 1312b206181dSStefan Haberland * after this compare again 1313b206181dSStefan Haberland * 1314b206181dSStefan Haberland * if either the rebuild or the recompare fails 1315b206181dSStefan Haberland * the path can not be used 1316b206181dSStefan Haberland */ 1317b206181dSStefan Haberland if (rebuild_device_uid(device, data) || 1318b206181dSStefan Haberland dasd_eckd_compare_path_uid( 1319b206181dSStefan Haberland device, &path_private)) { 1320b206181dSStefan Haberland uid = &path_private.uid; 1321b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1322b206181dSStefan Haberland snprintf(print_uid, sizeof(print_uid), 1323b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1324b206181dSStefan Haberland uid->vendor, uid->serial, 1325b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1326b206181dSStefan Haberland uid->vduit); 1327b206181dSStefan Haberland else 1328b206181dSStefan Haberland snprintf(print_uid, sizeof(print_uid), 1329b206181dSStefan Haberland "%s.%s.%04x.%02x", 1330b206181dSStefan Haberland uid->vendor, uid->serial, 1331b206181dSStefan Haberland uid->ssid, 1332b206181dSStefan Haberland uid->real_unit_addr); 1333b206181dSStefan Haberland dev_err(&device->cdev->dev, 1334b206181dSStefan Haberland "The newly added channel path %02X " 1335b206181dSStefan Haberland "will not be used because it leads " 1336b206181dSStefan Haberland "to a different device %s\n", 1337b206181dSStefan Haberland lpm, print_uid); 1338b206181dSStefan Haberland opm &= ~lpm; 1339b206181dSStefan Haberland npm &= ~lpm; 1340b206181dSStefan Haberland ppm &= ~lpm; 13415db8440cSStefan Haberland cablepm |= lpm; 1342b206181dSStefan Haberland continue; 1343a4d26c6aSStefan Weinhuber } 1344a4d26c6aSStefan Weinhuber } 1345b206181dSStefan Haberland 1346a4d26c6aSStefan Weinhuber /* 1347a4d26c6aSStefan Weinhuber * There is a small chance that a path is lost again between 1348a4d26c6aSStefan Weinhuber * above path verification and the following modification of 1349a4d26c6aSStefan Weinhuber * the device opm mask. We could avoid that race here by using 1350a4d26c6aSStefan Weinhuber * yet another path mask, but we rather deal with this unlikely 1351a4d26c6aSStefan Weinhuber * situation in dasd_start_IO. 1352a4d26c6aSStefan Weinhuber */ 1353a4d26c6aSStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1354c9346151SStefan Haberland if (!dasd_path_get_opm(device) && opm) { 1355c9346151SStefan Haberland dasd_path_set_opm(device, opm); 1356a4d26c6aSStefan Weinhuber dasd_generic_path_operational(device); 13575db8440cSStefan Haberland } else { 1358c9346151SStefan Haberland dasd_path_add_opm(device, opm); 13595db8440cSStefan Haberland } 1360c9346151SStefan Haberland dasd_path_add_nppm(device, npm); 1361c9346151SStefan Haberland dasd_path_add_ppm(device, ppm); 1362c9346151SStefan Haberland dasd_path_add_tbvpm(device, epm); 1363c9346151SStefan Haberland dasd_path_add_cablepm(device, cablepm); 1364c9346151SStefan Haberland dasd_path_add_nohpfpm(device, hpfpm); 1365a4d26c6aSStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1366b206181dSStefan Haberland } 13671eb38023SStefan Haberland clear_bit(DASD_FLAG_PATH_VERIFY, &device->flags); 1368a4d26c6aSStefan Weinhuber dasd_put_device(device); 1369a4d26c6aSStefan Weinhuber if (data->isglobal) 1370a4d26c6aSStefan Weinhuber mutex_unlock(&dasd_path_verification_mutex); 1371a4d26c6aSStefan Weinhuber else 1372a4d26c6aSStefan Weinhuber kfree(data); 1373a4d26c6aSStefan Weinhuber } 1374a4d26c6aSStefan Weinhuber 1375a4d26c6aSStefan Weinhuber static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm) 1376a4d26c6aSStefan Weinhuber { 1377a4d26c6aSStefan Weinhuber struct path_verification_work_data *data; 1378a4d26c6aSStefan Weinhuber 1379a4d26c6aSStefan Weinhuber data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA); 1380a4d26c6aSStefan Weinhuber if (!data) { 1381a4d26c6aSStefan Weinhuber if (mutex_trylock(&dasd_path_verification_mutex)) { 1382a4d26c6aSStefan Weinhuber data = path_verification_worker; 1383a4d26c6aSStefan Weinhuber data->isglobal = 1; 1384a4d26c6aSStefan Weinhuber } else 1385a4d26c6aSStefan Weinhuber return -ENOMEM; 1386a4d26c6aSStefan Weinhuber } else { 1387a4d26c6aSStefan Weinhuber memset(data, 0, sizeof(*data)); 1388a4d26c6aSStefan Weinhuber data->isglobal = 0; 1389a4d26c6aSStefan Weinhuber } 1390a4d26c6aSStefan Weinhuber INIT_WORK(&data->worker, do_path_verification_work); 1391a4d26c6aSStefan Weinhuber dasd_get_device(device); 1392a4d26c6aSStefan Weinhuber data->device = device; 1393a4d26c6aSStefan Weinhuber data->tbvpm = lpm; 1394a4d26c6aSStefan Weinhuber schedule_work(&data->worker); 1395a4d26c6aSStefan Weinhuber return 0; 1396a4d26c6aSStefan Weinhuber } 1397a4d26c6aSStefan Weinhuber 1398a521b048SStefan Haberland static void dasd_eckd_reset_path(struct dasd_device *device, __u8 pm) 1399a521b048SStefan Haberland { 1400a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 1401a521b048SStefan Haberland unsigned long flags; 1402a521b048SStefan Haberland 1403a521b048SStefan Haberland if (!private->fcx_max_data) 1404a521b048SStefan Haberland private->fcx_max_data = get_fcx_max_data(device); 1405a521b048SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1406a521b048SStefan Haberland dasd_path_set_tbvpm(device, pm ? : dasd_path_get_notoperpm(device)); 1407a521b048SStefan Haberland dasd_schedule_device_bh(device); 1408a521b048SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1409a521b048SStefan Haberland } 1410a521b048SStefan Haberland 14118e09f215SStefan Weinhuber static int dasd_eckd_read_features(struct dasd_device *device) 14128e09f215SStefan Weinhuber { 1413543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 14148e09f215SStefan Weinhuber struct dasd_psf_prssd_data *prssdp; 14158e09f215SStefan Weinhuber struct dasd_rssd_features *features; 14168e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 14178e09f215SStefan Weinhuber struct ccw1 *ccw; 14188e09f215SStefan Weinhuber int rc; 14198e09f215SStefan Weinhuber 142068d1e5f0SStefan Weinhuber memset(&private->features, 0, sizeof(struct dasd_rssd_features)); 142168b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 14228e09f215SStefan Weinhuber (sizeof(struct dasd_psf_prssd_data) + 14238e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)), 1424c5205f2fSSebastian Ott device, NULL); 14258e09f215SStefan Weinhuber if (IS_ERR(cqr)) { 1426b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " 1427b8ed5dd5SStefan Haberland "allocate initialization request"); 14288e09f215SStefan Weinhuber return PTR_ERR(cqr); 14298e09f215SStefan Weinhuber } 14308e09f215SStefan Weinhuber cqr->startdev = device; 14318e09f215SStefan Weinhuber cqr->memdev = device; 14328e09f215SStefan Weinhuber cqr->block = NULL; 1433eb6e199bSStefan Weinhuber cqr->retries = 256; 14348e09f215SStefan Weinhuber cqr->expires = 10 * HZ; 14358e09f215SStefan Weinhuber 14368e09f215SStefan Weinhuber /* Prepare for Read Subsystem Data */ 14378e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 14388e09f215SStefan Weinhuber memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 14398e09f215SStefan Weinhuber prssdp->order = PSF_ORDER_PRSSD; 14408e09f215SStefan Weinhuber prssdp->suborder = 0x41; /* Read Feature Codes */ 14418e09f215SStefan Weinhuber /* all other bytes of prssdp must be zero */ 14428e09f215SStefan Weinhuber 14438e09f215SStefan Weinhuber ccw = cqr->cpaddr; 14448e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PSF; 14458e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_psf_prssd_data); 14468e09f215SStefan Weinhuber ccw->flags |= CCW_FLAG_CC; 14478e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) prssdp; 14488e09f215SStefan Weinhuber 14498e09f215SStefan Weinhuber /* Read Subsystem Data - feature codes */ 14508e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 14518e09f215SStefan Weinhuber memset(features, 0, sizeof(struct dasd_rssd_features)); 14528e09f215SStefan Weinhuber 14538e09f215SStefan Weinhuber ccw++; 14548e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RSSD; 14558e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_rssd_features); 14568e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) features; 14578e09f215SStefan Weinhuber 14581aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 14598e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 14608e09f215SStefan Weinhuber rc = dasd_sleep_on(cqr); 14618e09f215SStefan Weinhuber if (rc == 0) { 14628e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 14638e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 14648e09f215SStefan Weinhuber memcpy(&private->features, features, 14658e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)); 146668d1e5f0SStefan Weinhuber } else 146768d1e5f0SStefan Weinhuber dev_warn(&device->cdev->dev, "Reading device feature codes" 146868d1e5f0SStefan Weinhuber " failed with rc=%d\n", rc); 14698e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 14708e09f215SStefan Weinhuber return rc; 14718e09f215SStefan Weinhuber } 14728e09f215SStefan Weinhuber 14738e09f215SStefan Weinhuber 14743d052595SHorst Hummel /* 147540545573SHorst Hummel * Build CP for Perform Subsystem Function - SSC. 147640545573SHorst Hummel */ 1477f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, 1478f3eb5384SStefan Weinhuber int enable_pav) 147940545573SHorst Hummel { 148040545573SHorst Hummel struct dasd_ccw_req *cqr; 148140545573SHorst Hummel struct dasd_psf_ssc_data *psf_ssc_data; 148240545573SHorst Hummel struct ccw1 *ccw; 148340545573SHorst Hummel 148468b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 148540545573SHorst Hummel sizeof(struct dasd_psf_ssc_data), 1486c5205f2fSSebastian Ott device, NULL); 148740545573SHorst Hummel 148840545573SHorst Hummel if (IS_ERR(cqr)) { 1489fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 149040545573SHorst Hummel "Could not allocate PSF-SSC request"); 149140545573SHorst Hummel return cqr; 149240545573SHorst Hummel } 149340545573SHorst Hummel psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 149440545573SHorst Hummel psf_ssc_data->order = PSF_ORDER_SSC; 1495626350b6SStefan Weinhuber psf_ssc_data->suborder = 0xc0; 1496f3eb5384SStefan Weinhuber if (enable_pav) { 1497626350b6SStefan Weinhuber psf_ssc_data->suborder |= 0x08; 14988e09f215SStefan Weinhuber psf_ssc_data->reserved[0] = 0x88; 1499f3eb5384SStefan Weinhuber } 150040545573SHorst Hummel ccw = cqr->cpaddr; 150140545573SHorst Hummel ccw->cmd_code = DASD_ECKD_CCW_PSF; 150240545573SHorst Hummel ccw->cda = (__u32)(addr_t)psf_ssc_data; 150340545573SHorst Hummel ccw->count = 66; 150440545573SHorst Hummel 15058e09f215SStefan Weinhuber cqr->startdev = device; 15068e09f215SStefan Weinhuber cqr->memdev = device; 15078e09f215SStefan Weinhuber cqr->block = NULL; 1508eb6e199bSStefan Weinhuber cqr->retries = 256; 150940545573SHorst Hummel cqr->expires = 10*HZ; 15101aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 151140545573SHorst Hummel cqr->status = DASD_CQR_FILLED; 151240545573SHorst Hummel return cqr; 151340545573SHorst Hummel } 151440545573SHorst Hummel 151540545573SHorst Hummel /* 151640545573SHorst Hummel * Perform Subsystem Function. 151740545573SHorst Hummel * It is necessary to trigger CIO for channel revalidation since this 151840545573SHorst Hummel * call might change behaviour of DASD devices. 151940545573SHorst Hummel */ 152040545573SHorst Hummel static int 152112d7b107SStefan Haberland dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav, 152212d7b107SStefan Haberland unsigned long flags) 152340545573SHorst Hummel { 152440545573SHorst Hummel struct dasd_ccw_req *cqr; 152540545573SHorst Hummel int rc; 152640545573SHorst Hummel 1527f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_psf_ssc(device, enable_pav); 152840545573SHorst Hummel if (IS_ERR(cqr)) 152940545573SHorst Hummel return PTR_ERR(cqr); 153040545573SHorst Hummel 153112d7b107SStefan Haberland /* 153212d7b107SStefan Haberland * set flags e.g. turn on failfast, to prevent blocking 153312d7b107SStefan Haberland * the calling function should handle failed requests 153412d7b107SStefan Haberland */ 153512d7b107SStefan Haberland cqr->flags |= flags; 153612d7b107SStefan Haberland 153740545573SHorst Hummel rc = dasd_sleep_on(cqr); 153840545573SHorst Hummel if (!rc) 153940545573SHorst Hummel /* trigger CIO to reprobe devices */ 154040545573SHorst Hummel css_schedule_reprobe(); 154112d7b107SStefan Haberland else if (cqr->intrc == -EAGAIN) 154212d7b107SStefan Haberland rc = -EAGAIN; 154312d7b107SStefan Haberland 15448e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 154540545573SHorst Hummel return rc; 154640545573SHorst Hummel } 154740545573SHorst Hummel 154840545573SHorst Hummel /* 154940545573SHorst Hummel * Valide storage server of current device. 155040545573SHorst Hummel */ 155112d7b107SStefan Haberland static int dasd_eckd_validate_server(struct dasd_device *device, 155212d7b107SStefan Haberland unsigned long flags) 155340545573SHorst Hummel { 1554543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1555543691a4SSebastian Ott int enable_pav, rc; 155640545573SHorst Hummel 1557f9f8d02fSStefan Haberland if (private->uid.type == UA_BASE_PAV_ALIAS || 1558f9f8d02fSStefan Haberland private->uid.type == UA_HYPER_PAV_ALIAS) 155912d7b107SStefan Haberland return 0; 156040545573SHorst Hummel if (dasd_nopav || MACHINE_IS_VM) 1561f3eb5384SStefan Weinhuber enable_pav = 0; 1562f3eb5384SStefan Weinhuber else 1563f3eb5384SStefan Weinhuber enable_pav = 1; 156412d7b107SStefan Haberland rc = dasd_eckd_psf_ssc(device, enable_pav, flags); 1565eb6e199bSStefan Weinhuber 156640545573SHorst Hummel /* may be requested feature is not available on server, 156740545573SHorst Hummel * therefore just report error and go ahead */ 1568b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " 1569b8ed5dd5SStefan Haberland "returned rc=%d", private->uid.ssid, rc); 157012d7b107SStefan Haberland return rc; 157140545573SHorst Hummel } 157240545573SHorst Hummel 1573f1633031SStefan Haberland /* 1574f1633031SStefan Haberland * worker to do a validate server in case of a lost pathgroup 1575f1633031SStefan Haberland */ 1576f1633031SStefan Haberland static void dasd_eckd_do_validate_server(struct work_struct *work) 1577f1633031SStefan Haberland { 1578f1633031SStefan Haberland struct dasd_device *device = container_of(work, struct dasd_device, 1579f1633031SStefan Haberland kick_validate); 1580ea4da6eaSStefan Haberland unsigned long flags = 0; 1581ea4da6eaSStefan Haberland 1582ea4da6eaSStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &flags); 1583ea4da6eaSStefan Haberland if (dasd_eckd_validate_server(device, flags) 158412d7b107SStefan Haberland == -EAGAIN) { 158512d7b107SStefan Haberland /* schedule worker again if failed */ 158612d7b107SStefan Haberland schedule_work(&device->kick_validate); 158712d7b107SStefan Haberland return; 158812d7b107SStefan Haberland } 158912d7b107SStefan Haberland 1590f1633031SStefan Haberland dasd_put_device(device); 1591f1633031SStefan Haberland } 1592f1633031SStefan Haberland 1593f1633031SStefan Haberland static void dasd_eckd_kick_validate_server(struct dasd_device *device) 1594f1633031SStefan Haberland { 1595f1633031SStefan Haberland dasd_get_device(device); 159625e2cf1cSStefan Haberland /* exit if device not online or in offline processing */ 159725e2cf1cSStefan Haberland if (test_bit(DASD_FLAG_OFFLINE, &device->flags) || 159825e2cf1cSStefan Haberland device->state < DASD_STATE_ONLINE) { 159925e2cf1cSStefan Haberland dasd_put_device(device); 160025e2cf1cSStefan Haberland return; 160125e2cf1cSStefan Haberland } 1602f1633031SStefan Haberland /* queue call to do_validate_server to the kernel event daemon. */ 1603f2608cd4SStefan Haberland if (!schedule_work(&device->kick_validate)) 1604f2608cd4SStefan Haberland dasd_put_device(device); 1605f1633031SStefan Haberland } 1606f1633031SStefan Haberland 160740545573SHorst Hummel /* 16083d052595SHorst Hummel * Check device characteristics. 16093d052595SHorst Hummel * If the device is accessible using ECKD discipline, the device is enabled. 16103d052595SHorst Hummel */ 16111da177e4SLinus Torvalds static int 16121da177e4SLinus Torvalds dasd_eckd_check_characteristics(struct dasd_device *device) 16131da177e4SLinus Torvalds { 1614543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 16158e09f215SStefan Weinhuber struct dasd_block *block; 16162dedf0d9SStefan Haberland struct dasd_uid temp_uid; 1617f9f8d02fSStefan Haberland int rc, i; 161833b62a30SStefan Weinhuber int readonly; 16197c8faa86SStefan Haberland unsigned long value; 16201da177e4SLinus Torvalds 1621f1633031SStefan Haberland /* setup work queue for validate server*/ 1622f1633031SStefan Haberland INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server); 162359a9ed5fSStefan Haberland /* setup work queue for summary unit check */ 162459a9ed5fSStefan Haberland INIT_WORK(&device->suc_work, dasd_alias_handle_summary_unit_check); 1625f1633031SStefan Haberland 1626454e1fa1SPeter Oberparleiter if (!ccw_device_is_pathgroup(device->cdev)) { 1627454e1fa1SPeter Oberparleiter dev_warn(&device->cdev->dev, 1628454e1fa1SPeter Oberparleiter "A channel path group could not be established\n"); 1629454e1fa1SPeter Oberparleiter return -EIO; 1630454e1fa1SPeter Oberparleiter } 1631454e1fa1SPeter Oberparleiter if (!ccw_device_is_multipath(device->cdev)) { 1632454e1fa1SPeter Oberparleiter dev_info(&device->cdev->dev, 1633454e1fa1SPeter Oberparleiter "The DASD is not operating in multipath mode\n"); 1634454e1fa1SPeter Oberparleiter } 163592636b15SSebastian Ott if (!private) { 163692636b15SSebastian Ott private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); 163792636b15SSebastian Ott if (!private) { 1638fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1639fc19f381SStefan Haberland "Allocating memory for private DASD data " 1640fc19f381SStefan Haberland "failed\n"); 16411da177e4SLinus Torvalds return -ENOMEM; 16421da177e4SLinus Torvalds } 1643543691a4SSebastian Ott device->private = private; 164492636b15SSebastian Ott } else { 164592636b15SSebastian Ott memset(private, 0, sizeof(*private)); 16461da177e4SLinus Torvalds } 16471da177e4SLinus Torvalds /* Invalidate status of initial analysis. */ 16481da177e4SLinus Torvalds private->init_cqr_status = -1; 16491da177e4SLinus Torvalds /* Set default cache operations. */ 16501da177e4SLinus Torvalds private->attrib.operation = DASD_NORMAL_CACHE; 16511da177e4SLinus Torvalds private->attrib.nr_cyl = 0; 16521da177e4SLinus Torvalds 165340545573SHorst Hummel /* Read Configuration Data */ 165440545573SHorst Hummel rc = dasd_eckd_read_conf(device); 165540545573SHorst Hummel if (rc) 16568e09f215SStefan Weinhuber goto out_err1; 165740545573SHorst Hummel 1658a521b048SStefan Haberland /* set some default values */ 16597c8faa86SStefan Haberland device->default_expires = DASD_EXPIRES; 16601f1ee9adSHannes Reinecke device->default_retries = DASD_RETRIES; 1661a521b048SStefan Haberland device->path_thrhld = DASD_ECKD_PATH_THRHLD; 1662a521b048SStefan Haberland device->path_interval = DASD_ECKD_PATH_INTERVAL; 16631f1ee9adSHannes Reinecke 16647c8faa86SStefan Haberland if (private->gneq) { 16657c8faa86SStefan Haberland value = 1; 16667c8faa86SStefan Haberland for (i = 0; i < private->gneq->timeout.value; i++) 16677c8faa86SStefan Haberland value = 10 * value; 16687c8faa86SStefan Haberland value = value * private->gneq->timeout.number; 16697c8faa86SStefan Haberland /* do not accept useless values */ 16707c8faa86SStefan Haberland if (value != 0 && value <= DASD_EXPIRES_MAX) 16717c8faa86SStefan Haberland device->default_expires = value; 16727c8faa86SStefan Haberland } 16737c8faa86SStefan Haberland 16742dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 16752dedf0d9SStefan Haberland if (temp_uid.type == UA_BASE_DEVICE) { 16768e09f215SStefan Weinhuber block = dasd_alloc_block(); 16778e09f215SStefan Weinhuber if (IS_ERR(block)) { 1678b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1679b8ed5dd5SStefan Haberland "could not allocate dasd " 1680b8ed5dd5SStefan Haberland "block structure"); 16818e09f215SStefan Weinhuber rc = PTR_ERR(block); 16828e09f215SStefan Weinhuber goto out_err1; 16838e09f215SStefan Weinhuber } 16848e09f215SStefan Weinhuber device->block = block; 16858e09f215SStefan Weinhuber block->base = device; 16868e09f215SStefan Weinhuber } 16878e09f215SStefan Weinhuber 1688f9f8d02fSStefan Haberland /* register lcu with alias handling, enable PAV */ 1689f9f8d02fSStefan Haberland rc = dasd_alias_make_device_known_to_lcu(device); 1690f9f8d02fSStefan Haberland if (rc) 16918e09f215SStefan Weinhuber goto out_err2; 1692f9f8d02fSStefan Haberland 169312d7b107SStefan Haberland dasd_eckd_validate_server(device, 0); 1694f4ac1d02SStefan Weinhuber 1695f4ac1d02SStefan Weinhuber /* device may report different configuration data after LCU setup */ 1696f4ac1d02SStefan Weinhuber rc = dasd_eckd_read_conf(device); 169740545573SHorst Hummel if (rc) 16988e09f215SStefan Weinhuber goto out_err3; 16998e09f215SStefan Weinhuber 17008e09f215SStefan Weinhuber /* Read Feature Codes */ 170168d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 170240545573SHorst Hummel 17031da177e4SLinus Torvalds /* Read Device Characteristics */ 170468b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 170568b781feSStefan Haberland &private->rdc_data, 64); 17068e09f215SStefan Weinhuber if (rc) { 1707b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1708b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 17098e09f215SStefan Weinhuber goto out_err3; 17108e09f215SStefan Weinhuber } 171134cd551aSStefan Haberland 171234cd551aSStefan Haberland if ((device->features & DASD_FEATURE_USERAW) && 171334cd551aSStefan Haberland !(private->rdc_data.facilities.RT_in_LR)) { 171434cd551aSStefan Haberland dev_err(&device->cdev->dev, "The storage server does not " 171534cd551aSStefan Haberland "support raw-track access\n"); 171634cd551aSStefan Haberland rc = -EINVAL; 171734cd551aSStefan Haberland goto out_err3; 171834cd551aSStefan Haberland } 171934cd551aSStefan Haberland 1720817f2c84SNikanth Karthikesan /* find the valid cylinder size */ 1721b44b0ab3SStefan Weinhuber if (private->rdc_data.no_cyl == LV_COMPAT_CYL && 1722b44b0ab3SStefan Weinhuber private->rdc_data.long_no_cyl) 1723b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.long_no_cyl; 1724b44b0ab3SStefan Weinhuber else 1725b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.no_cyl; 1726b44b0ab3SStefan Weinhuber 1727ef19298bSStefan Weinhuber private->fcx_max_data = get_fcx_max_data(device); 1728ef19298bSStefan Weinhuber 172933b62a30SStefan Weinhuber readonly = dasd_device_is_ro(device); 173033b62a30SStefan Weinhuber if (readonly) 173133b62a30SStefan Weinhuber set_bit(DASD_FLAG_DEVICE_RO, &device->flags); 173233b62a30SStefan Weinhuber 1733fc19f381SStefan Haberland dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " 173433b62a30SStefan Weinhuber "with %d cylinders, %d heads, %d sectors%s\n", 17351da177e4SLinus Torvalds private->rdc_data.dev_type, 17361da177e4SLinus Torvalds private->rdc_data.dev_model, 17371da177e4SLinus Torvalds private->rdc_data.cu_type, 17381da177e4SLinus Torvalds private->rdc_data.cu_model.model, 1739b44b0ab3SStefan Weinhuber private->real_cyl, 17401da177e4SLinus Torvalds private->rdc_data.trk_per_cyl, 174133b62a30SStefan Weinhuber private->rdc_data.sec_per_trk, 174233b62a30SStefan Weinhuber readonly ? ", read-only device" : ""); 17438e09f215SStefan Weinhuber return 0; 17448e09f215SStefan Weinhuber 17458e09f215SStefan Weinhuber out_err3: 17468e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 17478e09f215SStefan Weinhuber out_err2: 17488e09f215SStefan Weinhuber dasd_free_block(device->block); 17498e09f215SStefan Weinhuber device->block = NULL; 17508e09f215SStefan Weinhuber out_err1: 17514abb08c2SStefan Weinhuber kfree(private->conf_data); 17528e09f215SStefan Weinhuber kfree(device->private); 17538e09f215SStefan Weinhuber device->private = NULL; 17543d052595SHorst Hummel return rc; 17551da177e4SLinus Torvalds } 17561da177e4SLinus Torvalds 17578e09f215SStefan Weinhuber static void dasd_eckd_uncheck_device(struct dasd_device *device) 17588e09f215SStefan Weinhuber { 1759543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1760b179b037SStefan Haberland int i; 17614abb08c2SStefan Weinhuber 17627c6553d4SStefan Haberland if (!private) 17637c6553d4SStefan Haberland return; 17647c6553d4SStefan Haberland 17658e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 17664abb08c2SStefan Weinhuber private->ned = NULL; 17674abb08c2SStefan Weinhuber private->sneq = NULL; 17684abb08c2SStefan Weinhuber private->vdsneq = NULL; 17694abb08c2SStefan Weinhuber private->gneq = NULL; 17704abb08c2SStefan Weinhuber private->conf_len = 0; 1771b179b037SStefan Haberland for (i = 0; i < 8; i++) { 1772c9346151SStefan Haberland kfree(device->path[i].conf_data); 1773c9346151SStefan Haberland if ((__u8 *)device->path[i].conf_data == 1774b179b037SStefan Haberland private->conf_data) { 1775b179b037SStefan Haberland private->conf_data = NULL; 1776b179b037SStefan Haberland private->conf_len = 0; 1777b179b037SStefan Haberland } 1778c9346151SStefan Haberland device->path[i].conf_data = NULL; 1779a521b048SStefan Haberland device->path[i].cssid = 0; 1780a521b048SStefan Haberland device->path[i].ssid = 0; 1781a521b048SStefan Haberland device->path[i].chpid = 0; 1782b179b037SStefan Haberland } 17834abb08c2SStefan Weinhuber kfree(private->conf_data); 17844abb08c2SStefan Weinhuber private->conf_data = NULL; 17858e09f215SStefan Weinhuber } 17868e09f215SStefan Weinhuber 17871da177e4SLinus Torvalds static struct dasd_ccw_req * 17881da177e4SLinus Torvalds dasd_eckd_analysis_ccw(struct dasd_device *device) 17891da177e4SLinus Torvalds { 1790543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 17911da177e4SLinus Torvalds struct eckd_count *count_data; 17921da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 17931da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 17941da177e4SLinus Torvalds struct ccw1 *ccw; 17951da177e4SLinus Torvalds int cplength, datasize; 17961da177e4SLinus Torvalds int i; 17971da177e4SLinus Torvalds 17981da177e4SLinus Torvalds cplength = 8; 17991da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 1800c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device, 1801c5205f2fSSebastian Ott NULL); 18021da177e4SLinus Torvalds if (IS_ERR(cqr)) 18031da177e4SLinus Torvalds return cqr; 18041da177e4SLinus Torvalds ccw = cqr->cpaddr; 1805ce6915f5SJan Höppner /* Define extent for the first 2 tracks. */ 1806ce6915f5SJan Höppner define_extent(ccw++, cqr->data, 0, 1, 180745f186beSJan Höppner DASD_ECKD_CCW_READ_COUNT, device, 0); 18081da177e4SLinus Torvalds LO_data = cqr->data + sizeof(struct DE_eckd_data); 18091da177e4SLinus Torvalds /* Locate record for the first 4 records on track 0. */ 18101da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18111da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 0, 0, 4, 18121da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 18131da177e4SLinus Torvalds 18141da177e4SLinus Torvalds count_data = private->count_area; 18151da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 18161da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18171da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 18181da177e4SLinus Torvalds ccw->flags = 0; 18191da177e4SLinus Torvalds ccw->count = 8; 18201da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 18211da177e4SLinus Torvalds ccw++; 18221da177e4SLinus Torvalds count_data++; 18231da177e4SLinus Torvalds } 18241da177e4SLinus Torvalds 1825ce6915f5SJan Höppner /* Locate record for the first record on track 1. */ 18261da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 1827ce6915f5SJan Höppner locate_record(ccw++, LO_data++, 1, 0, 1, 18281da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 18291da177e4SLinus Torvalds /* Read count ccw. */ 18301da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 18311da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 18321da177e4SLinus Torvalds ccw->flags = 0; 18331da177e4SLinus Torvalds ccw->count = 8; 18341da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 18351da177e4SLinus Torvalds 18368e09f215SStefan Weinhuber cqr->block = NULL; 18378e09f215SStefan Weinhuber cqr->startdev = device; 18388e09f215SStefan Weinhuber cqr->memdev = device; 1839eb6e199bSStefan Weinhuber cqr->retries = 255; 18401aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 18411da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 18421da177e4SLinus Torvalds return cqr; 18431da177e4SLinus Torvalds } 18441da177e4SLinus Torvalds 1845eb6e199bSStefan Weinhuber /* differentiate between 'no record found' and any other error */ 1846eb6e199bSStefan Weinhuber static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) 1847eb6e199bSStefan Weinhuber { 1848eb6e199bSStefan Weinhuber char *sense; 1849eb6e199bSStefan Weinhuber if (init_cqr->status == DASD_CQR_DONE) 1850eb6e199bSStefan Weinhuber return INIT_CQR_OK; 1851eb6e199bSStefan Weinhuber else if (init_cqr->status == DASD_CQR_NEED_ERP || 1852eb6e199bSStefan Weinhuber init_cqr->status == DASD_CQR_FAILED) { 1853eb6e199bSStefan Weinhuber sense = dasd_get_sense(&init_cqr->irb); 1854eb6e199bSStefan Weinhuber if (sense && (sense[1] & SNS1_NO_REC_FOUND)) 1855eb6e199bSStefan Weinhuber return INIT_CQR_UNFORMATTED; 1856eb6e199bSStefan Weinhuber else 1857eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 1858eb6e199bSStefan Weinhuber } else 1859eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 1860eb6e199bSStefan Weinhuber } 1861eb6e199bSStefan Weinhuber 18621da177e4SLinus Torvalds /* 18631da177e4SLinus Torvalds * This is the callback function for the init_analysis cqr. It saves 18641da177e4SLinus Torvalds * the status of the initial analysis ccw before it frees it and kicks 18651da177e4SLinus Torvalds * the device to continue the startup sequence. This will call 18661da177e4SLinus Torvalds * dasd_eckd_do_analysis again (if the devices has not been marked 18671da177e4SLinus Torvalds * for deletion in the meantime). 18681da177e4SLinus Torvalds */ 1869eb6e199bSStefan Weinhuber static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, 1870eb6e199bSStefan Weinhuber void *data) 18711da177e4SLinus Torvalds { 1872543691a4SSebastian Ott struct dasd_device *device = init_cqr->startdev; 1873543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 18741da177e4SLinus Torvalds 1875eb6e199bSStefan Weinhuber private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); 18761da177e4SLinus Torvalds dasd_sfree_request(init_cqr, device); 18771da177e4SLinus Torvalds dasd_kick_device(device); 18781da177e4SLinus Torvalds } 18791da177e4SLinus Torvalds 1880eb6e199bSStefan Weinhuber static int dasd_eckd_start_analysis(struct dasd_block *block) 18811da177e4SLinus Torvalds { 18821da177e4SLinus Torvalds struct dasd_ccw_req *init_cqr; 18831da177e4SLinus Torvalds 18848e09f215SStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(block->base); 18851da177e4SLinus Torvalds if (IS_ERR(init_cqr)) 18861da177e4SLinus Torvalds return PTR_ERR(init_cqr); 18871da177e4SLinus Torvalds init_cqr->callback = dasd_eckd_analysis_callback; 18881da177e4SLinus Torvalds init_cqr->callback_data = NULL; 18891da177e4SLinus Torvalds init_cqr->expires = 5*HZ; 1890eb6e199bSStefan Weinhuber /* first try without ERP, so we can later handle unformatted 1891eb6e199bSStefan Weinhuber * devices as special case 1892eb6e199bSStefan Weinhuber */ 1893eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); 1894eb6e199bSStefan Weinhuber init_cqr->retries = 0; 18951da177e4SLinus Torvalds dasd_add_request_head(init_cqr); 18961da177e4SLinus Torvalds return -EAGAIN; 18971da177e4SLinus Torvalds } 18981da177e4SLinus Torvalds 1899eb6e199bSStefan Weinhuber static int dasd_eckd_end_analysis(struct dasd_block *block) 19001da177e4SLinus Torvalds { 1901543691a4SSebastian Ott struct dasd_device *device = block->base; 1902543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 19031da177e4SLinus Torvalds struct eckd_count *count_area; 19041da177e4SLinus Torvalds unsigned int sb, blk_per_trk; 19051da177e4SLinus Torvalds int status, i; 1906eb6e199bSStefan Weinhuber struct dasd_ccw_req *init_cqr; 19071da177e4SLinus Torvalds 19081da177e4SLinus Torvalds status = private->init_cqr_status; 19091da177e4SLinus Torvalds private->init_cqr_status = -1; 1910eb6e199bSStefan Weinhuber if (status == INIT_CQR_ERROR) { 1911eb6e199bSStefan Weinhuber /* try again, this time with full ERP */ 1912eb6e199bSStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(device); 1913eb6e199bSStefan Weinhuber dasd_sleep_on(init_cqr); 1914eb6e199bSStefan Weinhuber status = dasd_eckd_analysis_evaluation(init_cqr); 1915eb6e199bSStefan Weinhuber dasd_sfree_request(init_cqr, device); 1916eb6e199bSStefan Weinhuber } 1917eb6e199bSStefan Weinhuber 1918e4dbb0f2SStefan Haberland if (device->features & DASD_FEATURE_USERAW) { 1919e4dbb0f2SStefan Haberland block->bp_block = DASD_RAW_BLOCKSIZE; 1920e4dbb0f2SStefan Haberland blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; 1921e4dbb0f2SStefan Haberland block->s2b_shift = 3; 1922e4dbb0f2SStefan Haberland goto raw; 1923e4dbb0f2SStefan Haberland } 1924e4dbb0f2SStefan Haberland 1925eb6e199bSStefan Weinhuber if (status == INIT_CQR_UNFORMATTED) { 1926eb6e199bSStefan Weinhuber dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); 19271da177e4SLinus Torvalds return -EMEDIUMTYPE; 1928eb6e199bSStefan Weinhuber } else if (status == INIT_CQR_ERROR) { 1929eb6e199bSStefan Weinhuber dev_err(&device->cdev->dev, 1930eb6e199bSStefan Weinhuber "Detecting the DASD disk layout failed because " 1931eb6e199bSStefan Weinhuber "of an I/O error\n"); 1932eb6e199bSStefan Weinhuber return -EIO; 19331da177e4SLinus Torvalds } 19341da177e4SLinus Torvalds 19351da177e4SLinus Torvalds private->uses_cdl = 1; 19361da177e4SLinus Torvalds /* Check Track 0 for Compatible Disk Layout */ 19371da177e4SLinus Torvalds count_area = NULL; 19381da177e4SLinus Torvalds for (i = 0; i < 3; i++) { 19391da177e4SLinus Torvalds if (private->count_area[i].kl != 4 || 19403bc9fef9SStefan Haberland private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 || 19413bc9fef9SStefan Haberland private->count_area[i].cyl != 0 || 19423bc9fef9SStefan Haberland private->count_area[i].head != count_area_head[i] || 19433bc9fef9SStefan Haberland private->count_area[i].record != count_area_rec[i]) { 19441da177e4SLinus Torvalds private->uses_cdl = 0; 19451da177e4SLinus Torvalds break; 19461da177e4SLinus Torvalds } 19471da177e4SLinus Torvalds } 19481da177e4SLinus Torvalds if (i == 3) 1949ce6915f5SJan Höppner count_area = &private->count_area[3]; 19501da177e4SLinus Torvalds 19511da177e4SLinus Torvalds if (private->uses_cdl == 0) { 19521da177e4SLinus Torvalds for (i = 0; i < 5; i++) { 19531da177e4SLinus Torvalds if ((private->count_area[i].kl != 0) || 19541da177e4SLinus Torvalds (private->count_area[i].dl != 19553bc9fef9SStefan Haberland private->count_area[0].dl) || 19563bc9fef9SStefan Haberland private->count_area[i].cyl != 0 || 19573bc9fef9SStefan Haberland private->count_area[i].head != count_area_head[i] || 19583bc9fef9SStefan Haberland private->count_area[i].record != count_area_rec[i]) 19591da177e4SLinus Torvalds break; 19601da177e4SLinus Torvalds } 19611da177e4SLinus Torvalds if (i == 5) 19621da177e4SLinus Torvalds count_area = &private->count_area[0]; 19631da177e4SLinus Torvalds } else { 19641da177e4SLinus Torvalds if (private->count_area[3].record == 1) 1965fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1966fc19f381SStefan Haberland "Track 0 has no records following the VTOC\n"); 19671da177e4SLinus Torvalds } 1968e4dbb0f2SStefan Haberland 19691da177e4SLinus Torvalds if (count_area != NULL && count_area->kl == 0) { 19701da177e4SLinus Torvalds /* we found notthing violating our disk layout */ 19711da177e4SLinus Torvalds if (dasd_check_blocksize(count_area->dl) == 0) 19728e09f215SStefan Weinhuber block->bp_block = count_area->dl; 19731da177e4SLinus Torvalds } 19748e09f215SStefan Weinhuber if (block->bp_block == 0) { 1975fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1976fc19f381SStefan Haberland "The disk layout of the DASD is not supported\n"); 19771da177e4SLinus Torvalds return -EMEDIUMTYPE; 19781da177e4SLinus Torvalds } 19798e09f215SStefan Weinhuber block->s2b_shift = 0; /* bits to shift 512 to get a block */ 19808e09f215SStefan Weinhuber for (sb = 512; sb < block->bp_block; sb = sb << 1) 19818e09f215SStefan Weinhuber block->s2b_shift++; 19821da177e4SLinus Torvalds 19838e09f215SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 1984e4dbb0f2SStefan Haberland 1985e4dbb0f2SStefan Haberland raw: 19862cc9637cSPeter Oberparleiter block->blocks = ((unsigned long) private->real_cyl * 19871da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 19881da177e4SLinus Torvalds blk_per_trk); 19891da177e4SLinus Torvalds 1990fc19f381SStefan Haberland dev_info(&device->cdev->dev, 19912cc9637cSPeter Oberparleiter "DASD with %u KB/block, %lu KB total size, %u KB/track, " 1992fc19f381SStefan Haberland "%s\n", (block->bp_block >> 10), 19932cc9637cSPeter Oberparleiter (((unsigned long) private->real_cyl * 19941da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 19958e09f215SStefan Weinhuber blk_per_trk * (block->bp_block >> 9)) >> 1), 19968e09f215SStefan Weinhuber ((blk_per_trk * block->bp_block) >> 10), 19971da177e4SLinus Torvalds private->uses_cdl ? 19981da177e4SLinus Torvalds "compatible disk layout" : "linux disk layout"); 19991da177e4SLinus Torvalds 20001da177e4SLinus Torvalds return 0; 20011da177e4SLinus Torvalds } 20021da177e4SLinus Torvalds 20038e09f215SStefan Weinhuber static int dasd_eckd_do_analysis(struct dasd_block *block) 20041da177e4SLinus Torvalds { 2005543691a4SSebastian Ott struct dasd_eckd_private *private = block->base->private; 20061da177e4SLinus Torvalds 20071da177e4SLinus Torvalds if (private->init_cqr_status < 0) 20088e09f215SStefan Weinhuber return dasd_eckd_start_analysis(block); 20091da177e4SLinus Torvalds else 20108e09f215SStefan Weinhuber return dasd_eckd_end_analysis(block); 20111da177e4SLinus Torvalds } 20121da177e4SLinus Torvalds 2013d42e1712SStefan Haberland static int dasd_eckd_basic_to_ready(struct dasd_device *device) 20148e09f215SStefan Weinhuber { 20158e09f215SStefan Weinhuber return dasd_alias_add_device(device); 20168e09f215SStefan Weinhuber }; 20178e09f215SStefan Weinhuber 20188e09f215SStefan Weinhuber static int dasd_eckd_online_to_ready(struct dasd_device *device) 20198e09f215SStefan Weinhuber { 2020669f3765SStefan Haberland if (cancel_work_sync(&device->reload_device)) 2021669f3765SStefan Haberland dasd_put_device(device); 2022669f3765SStefan Haberland if (cancel_work_sync(&device->kick_validate)) 2023669f3765SStefan Haberland dasd_put_device(device); 2024669f3765SStefan Haberland 2025d42e1712SStefan Haberland return 0; 2026d42e1712SStefan Haberland }; 2027d42e1712SStefan Haberland 2028daa991bfSStefan Haberland static int dasd_eckd_basic_to_known(struct dasd_device *device) 2029d42e1712SStefan Haberland { 20308e09f215SStefan Weinhuber return dasd_alias_remove_device(device); 20318e09f215SStefan Weinhuber }; 20328e09f215SStefan Weinhuber 20331da177e4SLinus Torvalds static int 20348e09f215SStefan Weinhuber dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 20351da177e4SLinus Torvalds { 2036543691a4SSebastian Ott struct dasd_eckd_private *private = block->base->private; 20371da177e4SLinus Torvalds 20388e09f215SStefan Weinhuber if (dasd_check_blocksize(block->bp_block) == 0) { 20391da177e4SLinus Torvalds geo->sectors = recs_per_track(&private->rdc_data, 20408e09f215SStefan Weinhuber 0, block->bp_block); 20411da177e4SLinus Torvalds } 20421da177e4SLinus Torvalds geo->cylinders = private->rdc_data.no_cyl; 20431da177e4SLinus Torvalds geo->heads = private->rdc_data.trk_per_cyl; 20441da177e4SLinus Torvalds return 0; 20451da177e4SLinus Torvalds } 20461da177e4SLinus Torvalds 20478fd57520SJan Höppner /* 20488fd57520SJan Höppner * Build the TCW request for the format check 20498fd57520SJan Höppner */ 20508fd57520SJan Höppner static struct dasd_ccw_req * 20518fd57520SJan Höppner dasd_eckd_build_check_tcw(struct dasd_device *base, struct format_data_t *fdata, 20528fd57520SJan Höppner int enable_pav, struct eckd_count *fmt_buffer, 20538fd57520SJan Höppner int rpt) 20548fd57520SJan Höppner { 20558fd57520SJan Höppner struct dasd_eckd_private *start_priv; 20568fd57520SJan Höppner struct dasd_device *startdev = NULL; 20578fd57520SJan Höppner struct tidaw *last_tidaw = NULL; 20588fd57520SJan Höppner struct dasd_ccw_req *cqr; 20598fd57520SJan Höppner struct itcw *itcw; 20608fd57520SJan Höppner int itcw_size; 20618fd57520SJan Höppner int count; 20628fd57520SJan Höppner int rc; 20638fd57520SJan Höppner int i; 20648fd57520SJan Höppner 20658fd57520SJan Höppner if (enable_pav) 20668fd57520SJan Höppner startdev = dasd_alias_get_start_dev(base); 20678fd57520SJan Höppner 20688fd57520SJan Höppner if (!startdev) 20698fd57520SJan Höppner startdev = base; 20708fd57520SJan Höppner 20718fd57520SJan Höppner start_priv = startdev->private; 20728fd57520SJan Höppner 20738fd57520SJan Höppner count = rpt * (fdata->stop_unit - fdata->start_unit + 1); 20748fd57520SJan Höppner 20758fd57520SJan Höppner /* 20768fd57520SJan Höppner * we're adding 'count' amount of tidaw to the itcw. 20778fd57520SJan Höppner * calculate the corresponding itcw_size 20788fd57520SJan Höppner */ 20798fd57520SJan Höppner itcw_size = itcw_calc_size(0, count, 0); 20808fd57520SJan Höppner 2081c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev, 2082c5205f2fSSebastian Ott NULL); 20838fd57520SJan Höppner if (IS_ERR(cqr)) 20848fd57520SJan Höppner return cqr; 20858fd57520SJan Höppner 20868fd57520SJan Höppner start_priv->count++; 20878fd57520SJan Höppner 20888fd57520SJan Höppner itcw = itcw_init(cqr->data, itcw_size, ITCW_OP_READ, 0, count, 0); 20898fd57520SJan Höppner if (IS_ERR(itcw)) { 20908fd57520SJan Höppner rc = -EINVAL; 20918fd57520SJan Höppner goto out_err; 20928fd57520SJan Höppner } 20938fd57520SJan Höppner 20948fd57520SJan Höppner cqr->cpaddr = itcw_get_tcw(itcw); 20958fd57520SJan Höppner rc = prepare_itcw(itcw, fdata->start_unit, fdata->stop_unit, 20968fd57520SJan Höppner DASD_ECKD_CCW_READ_COUNT_MT, base, startdev, 0, count, 20978fd57520SJan Höppner sizeof(struct eckd_count), 20988fd57520SJan Höppner count * sizeof(struct eckd_count), 0, rpt); 20998fd57520SJan Höppner if (rc) 21008fd57520SJan Höppner goto out_err; 21018fd57520SJan Höppner 21028fd57520SJan Höppner for (i = 0; i < count; i++) { 21038fd57520SJan Höppner last_tidaw = itcw_add_tidaw(itcw, 0, fmt_buffer++, 21048fd57520SJan Höppner sizeof(struct eckd_count)); 21058fd57520SJan Höppner if (IS_ERR(last_tidaw)) { 21068fd57520SJan Höppner rc = -EINVAL; 21078fd57520SJan Höppner goto out_err; 21088fd57520SJan Höppner } 21098fd57520SJan Höppner } 21108fd57520SJan Höppner 21118fd57520SJan Höppner last_tidaw->flags |= TIDAW_FLAGS_LAST; 21128fd57520SJan Höppner itcw_finalize(itcw); 21138fd57520SJan Höppner 21148fd57520SJan Höppner cqr->cpmode = 1; 21158fd57520SJan Höppner cqr->startdev = startdev; 21168fd57520SJan Höppner cqr->memdev = startdev; 21178fd57520SJan Höppner cqr->basedev = base; 21188fd57520SJan Höppner cqr->retries = startdev->default_retries; 21198fd57520SJan Höppner cqr->expires = startdev->default_expires * HZ; 21208fd57520SJan Höppner cqr->buildclk = get_tod_clock(); 21218fd57520SJan Höppner cqr->status = DASD_CQR_FILLED; 21228fd57520SJan Höppner /* Set flags to suppress output for expected errors */ 21238fd57520SJan Höppner set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); 21248fd57520SJan Höppner set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); 21258fd57520SJan Höppner 21268fd57520SJan Höppner return cqr; 21278fd57520SJan Höppner 21288fd57520SJan Höppner out_err: 21298fd57520SJan Höppner dasd_sfree_request(cqr, startdev); 21308fd57520SJan Höppner 21318fd57520SJan Höppner return ERR_PTR(rc); 21328fd57520SJan Höppner } 21338fd57520SJan Höppner 21348fd57520SJan Höppner /* 21358fd57520SJan Höppner * Build the CCW request for the format check 21368fd57520SJan Höppner */ 21378fd57520SJan Höppner static struct dasd_ccw_req * 21388fd57520SJan Höppner dasd_eckd_build_check(struct dasd_device *base, struct format_data_t *fdata, 21398fd57520SJan Höppner int enable_pav, struct eckd_count *fmt_buffer, int rpt) 21408fd57520SJan Höppner { 21418fd57520SJan Höppner struct dasd_eckd_private *start_priv; 21428fd57520SJan Höppner struct dasd_eckd_private *base_priv; 21438fd57520SJan Höppner struct dasd_device *startdev = NULL; 21448fd57520SJan Höppner struct dasd_ccw_req *cqr; 21458fd57520SJan Höppner struct ccw1 *ccw; 21468fd57520SJan Höppner void *data; 21478fd57520SJan Höppner int cplength, datasize; 21488fd57520SJan Höppner int use_prefix; 21498fd57520SJan Höppner int count; 21508fd57520SJan Höppner int i; 21518fd57520SJan Höppner 21528fd57520SJan Höppner if (enable_pav) 21538fd57520SJan Höppner startdev = dasd_alias_get_start_dev(base); 21548fd57520SJan Höppner 21558fd57520SJan Höppner if (!startdev) 21568fd57520SJan Höppner startdev = base; 21578fd57520SJan Höppner 21588fd57520SJan Höppner start_priv = startdev->private; 21598fd57520SJan Höppner base_priv = base->private; 21608fd57520SJan Höppner 21618fd57520SJan Höppner count = rpt * (fdata->stop_unit - fdata->start_unit + 1); 21628fd57520SJan Höppner 21638fd57520SJan Höppner use_prefix = base_priv->features.feature[8] & 0x01; 21648fd57520SJan Höppner 21658fd57520SJan Höppner if (use_prefix) { 21668fd57520SJan Höppner cplength = 1; 21678fd57520SJan Höppner datasize = sizeof(struct PFX_eckd_data); 21688fd57520SJan Höppner } else { 21698fd57520SJan Höppner cplength = 2; 21708fd57520SJan Höppner datasize = sizeof(struct DE_eckd_data) + 21718fd57520SJan Höppner sizeof(struct LO_eckd_data); 21728fd57520SJan Höppner } 21738fd57520SJan Höppner cplength += count; 21748fd57520SJan Höppner 21758fd57520SJan Höppner cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 2176c5205f2fSSebastian Ott startdev, NULL); 21778fd57520SJan Höppner if (IS_ERR(cqr)) 21788fd57520SJan Höppner return cqr; 21798fd57520SJan Höppner 21808fd57520SJan Höppner start_priv->count++; 21818fd57520SJan Höppner data = cqr->data; 21828fd57520SJan Höppner ccw = cqr->cpaddr; 21838fd57520SJan Höppner 21848fd57520SJan Höppner if (use_prefix) { 21858fd57520SJan Höppner prefix_LRE(ccw++, data, fdata->start_unit, fdata->stop_unit, 21868fd57520SJan Höppner DASD_ECKD_CCW_READ_COUNT, base, startdev, 1, 0, 21878fd57520SJan Höppner count, 0, 0); 21888fd57520SJan Höppner } else { 21898fd57520SJan Höppner define_extent(ccw++, data, fdata->start_unit, fdata->stop_unit, 219045f186beSJan Höppner DASD_ECKD_CCW_READ_COUNT, startdev, 0); 21918fd57520SJan Höppner 21928fd57520SJan Höppner data += sizeof(struct DE_eckd_data); 21938fd57520SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 21948fd57520SJan Höppner 21958fd57520SJan Höppner locate_record(ccw++, data, fdata->start_unit, 0, count, 21968fd57520SJan Höppner DASD_ECKD_CCW_READ_COUNT, base, 0); 21978fd57520SJan Höppner } 21988fd57520SJan Höppner 21998fd57520SJan Höppner for (i = 0; i < count; i++) { 22008fd57520SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 22018fd57520SJan Höppner ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 22028fd57520SJan Höppner ccw->flags = CCW_FLAG_SLI; 22038fd57520SJan Höppner ccw->count = 8; 22048fd57520SJan Höppner ccw->cda = (__u32)(addr_t) fmt_buffer; 22058fd57520SJan Höppner ccw++; 22068fd57520SJan Höppner fmt_buffer++; 22078fd57520SJan Höppner } 22088fd57520SJan Höppner 22098fd57520SJan Höppner cqr->startdev = startdev; 22108fd57520SJan Höppner cqr->memdev = startdev; 22118fd57520SJan Höppner cqr->basedev = base; 22128fd57520SJan Höppner cqr->retries = DASD_RETRIES; 22138fd57520SJan Höppner cqr->expires = startdev->default_expires * HZ; 22148fd57520SJan Höppner cqr->buildclk = get_tod_clock(); 22158fd57520SJan Höppner cqr->status = DASD_CQR_FILLED; 22168fd57520SJan Höppner /* Set flags to suppress output for expected errors */ 22178fd57520SJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 22188fd57520SJan Höppner 22198fd57520SJan Höppner return cqr; 22208fd57520SJan Höppner } 22218fd57520SJan Höppner 22221da177e4SLinus Torvalds static struct dasd_ccw_req * 2223d42e1712SStefan Haberland dasd_eckd_build_format(struct dasd_device *base, 222429b8dd9dSStefan Haberland struct format_data_t *fdata, 2225a94fa154SStefan Haberland int enable_pav) 22261da177e4SLinus Torvalds { 2227d42e1712SStefan Haberland struct dasd_eckd_private *base_priv; 2228d42e1712SStefan Haberland struct dasd_eckd_private *start_priv; 222929b8dd9dSStefan Haberland struct dasd_device *startdev = NULL; 22301da177e4SLinus Torvalds struct dasd_ccw_req *fcp; 22311da177e4SLinus Torvalds struct eckd_count *ect; 2232d42e1712SStefan Haberland struct ch_t address; 22331da177e4SLinus Torvalds struct ccw1 *ccw; 22341da177e4SLinus Torvalds void *data; 2235b44b0ab3SStefan Weinhuber int rpt; 22361da177e4SLinus Torvalds int cplength, datasize; 2237d42e1712SStefan Haberland int i, j; 2238f9a28f7bSJean-Baptiste Joret int intensity = 0; 2239f9a28f7bSJean-Baptiste Joret int r0_perm; 2240d42e1712SStefan Haberland int nr_tracks; 224118d6624eSStefan Haberland int use_prefix; 22421da177e4SLinus Torvalds 2243a94fa154SStefan Haberland if (enable_pav) 2244d42e1712SStefan Haberland startdev = dasd_alias_get_start_dev(base); 224529b8dd9dSStefan Haberland 2246d42e1712SStefan Haberland if (!startdev) 2247d42e1712SStefan Haberland startdev = base; 22481da177e4SLinus Torvalds 2249543691a4SSebastian Ott start_priv = startdev->private; 2250543691a4SSebastian Ott base_priv = base->private; 2251d42e1712SStefan Haberland 2252d42e1712SStefan Haberland rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize); 2253d42e1712SStefan Haberland 2254d42e1712SStefan Haberland nr_tracks = fdata->stop_unit - fdata->start_unit + 1; 22551da177e4SLinus Torvalds 22561da177e4SLinus Torvalds /* 22571da177e4SLinus Torvalds * fdata->intensity is a bit string that tells us what to do: 22581da177e4SLinus Torvalds * Bit 0: write record zero 22591da177e4SLinus Torvalds * Bit 1: write home address, currently not supported 22601da177e4SLinus Torvalds * Bit 2: invalidate tracks 22611da177e4SLinus Torvalds * Bit 3: use OS/390 compatible disk layout (cdl) 2262f9a28f7bSJean-Baptiste Joret * Bit 4: do not allow storage subsystem to modify record zero 22631da177e4SLinus Torvalds * Only some bit combinations do make sense. 22641da177e4SLinus Torvalds */ 2265f9a28f7bSJean-Baptiste Joret if (fdata->intensity & 0x10) { 2266f9a28f7bSJean-Baptiste Joret r0_perm = 0; 2267f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity & ~0x10; 2268f9a28f7bSJean-Baptiste Joret } else { 2269f9a28f7bSJean-Baptiste Joret r0_perm = 1; 2270f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity; 2271f9a28f7bSJean-Baptiste Joret } 2272d42e1712SStefan Haberland 227318d6624eSStefan Haberland use_prefix = base_priv->features.feature[8] & 0x01; 227418d6624eSStefan Haberland 2275f9a28f7bSJean-Baptiste Joret switch (intensity) { 22761da177e4SLinus Torvalds case 0x00: /* Normal format */ 22771da177e4SLinus Torvalds case 0x08: /* Normal format, use cdl. */ 2278d42e1712SStefan Haberland cplength = 2 + (rpt*nr_tracks); 227918d6624eSStefan Haberland if (use_prefix) 2280d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 22811da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 2282d42e1712SStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 228318d6624eSStefan Haberland else 228418d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 228518d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 228618d6624eSStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 22871da177e4SLinus Torvalds break; 22881da177e4SLinus Torvalds case 0x01: /* Write record zero and format track. */ 22891da177e4SLinus Torvalds case 0x09: /* Write record zero and format track, use cdl. */ 2290d42e1712SStefan Haberland cplength = 2 + rpt * nr_tracks; 229118d6624eSStefan Haberland if (use_prefix) 2292d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 22931da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 22941da177e4SLinus Torvalds sizeof(struct eckd_count) + 2295d42e1712SStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 229618d6624eSStefan Haberland else 229718d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 229818d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 229918d6624eSStefan Haberland sizeof(struct eckd_count) + 230018d6624eSStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 23011da177e4SLinus Torvalds break; 23021da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 23031da177e4SLinus Torvalds case 0x0c: /* Invalidate track, use cdl. */ 23041da177e4SLinus Torvalds cplength = 3; 230518d6624eSStefan Haberland if (use_prefix) 2306d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 23071da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 23081da177e4SLinus Torvalds sizeof(struct eckd_count); 230918d6624eSStefan Haberland else 231018d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 231118d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 231218d6624eSStefan Haberland sizeof(struct eckd_count); 23131da177e4SLinus Torvalds break; 23141da177e4SLinus Torvalds default: 2315d42e1712SStefan Haberland dev_warn(&startdev->cdev->dev, 2316d42e1712SStefan Haberland "An I/O control call used incorrect flags 0x%x\n", 2317d42e1712SStefan Haberland fdata->intensity); 23181da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 23191da177e4SLinus Torvalds } 23201da177e4SLinus Torvalds /* Allocate the format ccw request. */ 2321d42e1712SStefan Haberland fcp = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 2322c5205f2fSSebastian Ott datasize, startdev, NULL); 23231da177e4SLinus Torvalds if (IS_ERR(fcp)) 23241da177e4SLinus Torvalds return fcp; 23251da177e4SLinus Torvalds 2326d42e1712SStefan Haberland start_priv->count++; 23271da177e4SLinus Torvalds data = fcp->data; 23281da177e4SLinus Torvalds ccw = fcp->cpaddr; 23291da177e4SLinus Torvalds 2330f9a28f7bSJean-Baptiste Joret switch (intensity & ~0x08) { 23311da177e4SLinus Torvalds case 0x00: /* Normal format. */ 233218d6624eSStefan Haberland if (use_prefix) { 2333d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2334d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 2335d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2336f9a28f7bSJean-Baptiste Joret /* grant subsystem permission to format R0 */ 2337f9a28f7bSJean-Baptiste Joret if (r0_perm) 2338d42e1712SStefan Haberland ((struct PFX_eckd_data *)data) 2339d42e1712SStefan Haberland ->define_extent.ga_extended |= 0x04; 2340d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 234118d6624eSStefan Haberland } else { 234218d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 234318d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 234445f186beSJan Höppner DASD_ECKD_CCW_WRITE_CKD, startdev, 0); 234518d6624eSStefan Haberland /* grant subsystem permission to format R0 */ 234618d6624eSStefan Haberland if (r0_perm) 234718d6624eSStefan Haberland ((struct DE_eckd_data *) data) 234818d6624eSStefan Haberland ->ga_extended |= 0x04; 234918d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 235018d6624eSStefan Haberland } 23511da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 23521da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 2353d42e1712SStefan Haberland fdata->start_unit, 0, rpt*nr_tracks, 2354d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, 23551da177e4SLinus Torvalds fdata->blksize); 23561da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 23571da177e4SLinus Torvalds break; 23581da177e4SLinus Torvalds case 0x01: /* Write record zero + format track. */ 235918d6624eSStefan Haberland if (use_prefix) { 2360d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2361d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 23621da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, 2363d42e1712SStefan Haberland base, startdev); 2364d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 236518d6624eSStefan Haberland } else { 236618d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 236718d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 236845f186beSJan Höppner DASD_ECKD_CCW_WRITE_RECORD_ZERO, startdev, 0); 236918d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 237018d6624eSStefan Haberland } 23711da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 23721da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 2373d42e1712SStefan Haberland fdata->start_unit, 0, rpt * nr_tracks + 1, 2374d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_RECORD_ZERO, base, 2375d42e1712SStefan Haberland base->block->bp_block); 23761da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 23771da177e4SLinus Torvalds break; 23781da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 237918d6624eSStefan Haberland if (use_prefix) { 2380d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2381d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 2382d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2383d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 238418d6624eSStefan Haberland } else { 238518d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 238618d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 238745f186beSJan Höppner DASD_ECKD_CCW_WRITE_CKD, startdev, 0); 238818d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 238918d6624eSStefan Haberland } 23901da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 23911da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 23921da177e4SLinus Torvalds fdata->start_unit, 0, 1, 2393d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, 8); 23941da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 23951da177e4SLinus Torvalds break; 23961da177e4SLinus Torvalds } 2397d42e1712SStefan Haberland 2398d42e1712SStefan Haberland for (j = 0; j < nr_tracks; j++) { 2399d42e1712SStefan Haberland /* calculate cylinder and head for the current track */ 2400d42e1712SStefan Haberland set_ch_t(&address, 2401d42e1712SStefan Haberland (fdata->start_unit + j) / 2402d42e1712SStefan Haberland base_priv->rdc_data.trk_per_cyl, 2403d42e1712SStefan Haberland (fdata->start_unit + j) % 2404d42e1712SStefan Haberland base_priv->rdc_data.trk_per_cyl); 2405f9a28f7bSJean-Baptiste Joret if (intensity & 0x01) { /* write record zero */ 24061da177e4SLinus Torvalds ect = (struct eckd_count *) data; 24071da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2408b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2409b44b0ab3SStefan Weinhuber ect->head = address.head; 24101da177e4SLinus Torvalds ect->record = 0; 24111da177e4SLinus Torvalds ect->kl = 0; 24121da177e4SLinus Torvalds ect->dl = 8; 24131da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 24141da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 24151da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 24161da177e4SLinus Torvalds ccw->count = 8; 24171da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 24181da177e4SLinus Torvalds ccw++; 24191da177e4SLinus Torvalds } 2420f9a28f7bSJean-Baptiste Joret if ((intensity & ~0x08) & 0x04) { /* erase track */ 24211da177e4SLinus Torvalds ect = (struct eckd_count *) data; 24221da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2423b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2424b44b0ab3SStefan Weinhuber ect->head = address.head; 24251da177e4SLinus Torvalds ect->record = 1; 24261da177e4SLinus Torvalds ect->kl = 0; 24271da177e4SLinus Torvalds ect->dl = 0; 24281da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 24291da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 24301da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 24311da177e4SLinus Torvalds ccw->count = 8; 24321da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 24331da177e4SLinus Torvalds } else { /* write remaining records */ 24341da177e4SLinus Torvalds for (i = 0; i < rpt; i++) { 24351da177e4SLinus Torvalds ect = (struct eckd_count *) data; 24361da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2437b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2438b44b0ab3SStefan Weinhuber ect->head = address.head; 24391da177e4SLinus Torvalds ect->record = i + 1; 24401da177e4SLinus Torvalds ect->kl = 0; 24411da177e4SLinus Torvalds ect->dl = fdata->blksize; 2442d42e1712SStefan Haberland /* 2443d42e1712SStefan Haberland * Check for special tracks 0-1 2444d42e1712SStefan Haberland * when formatting CDL 2445d42e1712SStefan Haberland */ 2446f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 244746d1c03cSJan Höppner address.cyl == 0 && address.head == 0) { 24481da177e4SLinus Torvalds if (i < 3) { 24491da177e4SLinus Torvalds ect->kl = 4; 24501da177e4SLinus Torvalds ect->dl = sizes_trk0[i] - 4; 24511da177e4SLinus Torvalds } 24521da177e4SLinus Torvalds } 2453f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 245446d1c03cSJan Höppner address.cyl == 0 && address.head == 1) { 24551da177e4SLinus Torvalds ect->kl = 44; 24561da177e4SLinus Torvalds ect->dl = LABEL_SIZE - 44; 24571da177e4SLinus Torvalds } 24581da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 2459d42e1712SStefan Haberland if (i != 0 || j == 0) 2460d42e1712SStefan Haberland ccw->cmd_code = 2461d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD; 2462d42e1712SStefan Haberland else 2463d42e1712SStefan Haberland ccw->cmd_code = 2464d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD_MT; 24651da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 24661da177e4SLinus Torvalds ccw->count = 8; 24671da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 24681da177e4SLinus Torvalds ccw++; 24691da177e4SLinus Torvalds } 24701da177e4SLinus Torvalds } 2471d42e1712SStefan Haberland } 2472d42e1712SStefan Haberland 2473d42e1712SStefan Haberland fcp->startdev = startdev; 2474d42e1712SStefan Haberland fcp->memdev = startdev; 247529b8dd9dSStefan Haberland fcp->basedev = base; 2476eb6e199bSStefan Weinhuber fcp->retries = 256; 2477d42e1712SStefan Haberland fcp->expires = startdev->default_expires * HZ; 24781aae0560SHeiko Carstens fcp->buildclk = get_tod_clock(); 24791da177e4SLinus Torvalds fcp->status = DASD_CQR_FILLED; 2480d42e1712SStefan Haberland 24811da177e4SLinus Torvalds return fcp; 24821da177e4SLinus Torvalds } 24831da177e4SLinus Torvalds 2484570d237cSJan Höppner /* 2485570d237cSJan Höppner * Wrapper function to build a CCW request depending on input data 2486570d237cSJan Höppner */ 2487570d237cSJan Höppner static struct dasd_ccw_req * 2488570d237cSJan Höppner dasd_eckd_format_build_ccw_req(struct dasd_device *base, 24898fd57520SJan Höppner struct format_data_t *fdata, int enable_pav, 24908fd57520SJan Höppner int tpm, struct eckd_count *fmt_buffer, int rpt) 2491d42e1712SStefan Haberland { 24928fd57520SJan Höppner struct dasd_ccw_req *ccw_req; 24938fd57520SJan Höppner 24948fd57520SJan Höppner if (!fmt_buffer) { 24958fd57520SJan Höppner ccw_req = dasd_eckd_build_format(base, fdata, enable_pav); 24968fd57520SJan Höppner } else { 24978fd57520SJan Höppner if (tpm) 24988fd57520SJan Höppner ccw_req = dasd_eckd_build_check_tcw(base, fdata, 24998fd57520SJan Höppner enable_pav, 25008fd57520SJan Höppner fmt_buffer, rpt); 25018fd57520SJan Höppner else 25028fd57520SJan Höppner ccw_req = dasd_eckd_build_check(base, fdata, enable_pav, 25038fd57520SJan Höppner fmt_buffer, rpt); 25048fd57520SJan Höppner } 25058fd57520SJan Höppner 25068fd57520SJan Höppner return ccw_req; 2507570d237cSJan Höppner } 2508570d237cSJan Höppner 2509570d237cSJan Höppner /* 2510570d237cSJan Höppner * Sanity checks on format_data 2511570d237cSJan Höppner */ 2512570d237cSJan Höppner static int dasd_eckd_format_sanity_checks(struct dasd_device *base, 2513570d237cSJan Höppner struct format_data_t *fdata) 2514570d237cSJan Höppner { 2515543691a4SSebastian Ott struct dasd_eckd_private *private = base->private; 2516d42e1712SStefan Haberland 2517d42e1712SStefan Haberland if (fdata->start_unit >= 2518d42e1712SStefan Haberland (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2519d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2520d42e1712SStefan Haberland "Start track number %u used in formatting is too big\n", 2521d42e1712SStefan Haberland fdata->start_unit); 2522d42e1712SStefan Haberland return -EINVAL; 2523d42e1712SStefan Haberland } 2524d42e1712SStefan Haberland if (fdata->stop_unit >= 2525d42e1712SStefan Haberland (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2526d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2527d42e1712SStefan Haberland "Stop track number %u used in formatting is too big\n", 2528d42e1712SStefan Haberland fdata->stop_unit); 2529d42e1712SStefan Haberland return -EINVAL; 2530d42e1712SStefan Haberland } 2531d42e1712SStefan Haberland if (fdata->start_unit > fdata->stop_unit) { 2532d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2533d42e1712SStefan Haberland "Start track %u used in formatting exceeds end track\n", 2534d42e1712SStefan Haberland fdata->start_unit); 2535d42e1712SStefan Haberland return -EINVAL; 2536d42e1712SStefan Haberland } 2537d42e1712SStefan Haberland if (dasd_check_blocksize(fdata->blksize) != 0) { 2538d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2539d42e1712SStefan Haberland "The DASD cannot be formatted with block size %u\n", 2540d42e1712SStefan Haberland fdata->blksize); 2541d42e1712SStefan Haberland return -EINVAL; 2542d42e1712SStefan Haberland } 2543570d237cSJan Höppner return 0; 2544570d237cSJan Höppner } 2545570d237cSJan Höppner 2546570d237cSJan Höppner /* 2547570d237cSJan Höppner * This function will process format_data originally coming from an IOCTL 2548570d237cSJan Höppner */ 2549570d237cSJan Höppner static int dasd_eckd_format_process_data(struct dasd_device *base, 2550570d237cSJan Höppner struct format_data_t *fdata, 25518fd57520SJan Höppner int enable_pav, int tpm, 25528fd57520SJan Höppner struct eckd_count *fmt_buffer, int rpt, 25538fd57520SJan Höppner struct irb *irb) 2554570d237cSJan Höppner { 2555543691a4SSebastian Ott struct dasd_eckd_private *private = base->private; 2556570d237cSJan Höppner struct dasd_ccw_req *cqr, *n; 2557570d237cSJan Höppner struct list_head format_queue; 2558570d237cSJan Höppner struct dasd_device *device; 25598fd57520SJan Höppner char *sense = NULL; 2560570d237cSJan Höppner int old_start, old_stop, format_step; 2561570d237cSJan Höppner int step, retry; 2562570d237cSJan Höppner int rc; 2563570d237cSJan Höppner 2564570d237cSJan Höppner rc = dasd_eckd_format_sanity_checks(base, fdata); 2565570d237cSJan Höppner if (rc) 2566570d237cSJan Höppner return rc; 2567d42e1712SStefan Haberland 2568d42e1712SStefan Haberland INIT_LIST_HEAD(&format_queue); 2569d42e1712SStefan Haberland 257046d1c03cSJan Höppner old_start = fdata->start_unit; 257129b8dd9dSStefan Haberland old_stop = fdata->stop_unit; 2572d42e1712SStefan Haberland 25738fd57520SJan Höppner if (!tpm && fmt_buffer != NULL) { 25748fd57520SJan Höppner /* Command Mode / Format Check */ 25758fd57520SJan Höppner format_step = 1; 25768fd57520SJan Höppner } else if (tpm && fmt_buffer != NULL) { 25778fd57520SJan Höppner /* Transport Mode / Format Check */ 25788fd57520SJan Höppner format_step = DASD_CQR_MAX_CCW / rpt; 25798fd57520SJan Höppner } else { 25808fd57520SJan Höppner /* Normal Formatting */ 25818fd57520SJan Höppner format_step = DASD_CQR_MAX_CCW / 25828fd57520SJan Höppner recs_per_track(&private->rdc_data, 0, fdata->blksize); 25838fd57520SJan Höppner } 25848fd57520SJan Höppner 258546d1c03cSJan Höppner do { 258646d1c03cSJan Höppner retry = 0; 2587d42e1712SStefan Haberland while (fdata->start_unit <= old_stop) { 2588d42e1712SStefan Haberland step = fdata->stop_unit - fdata->start_unit + 1; 258946d1c03cSJan Höppner if (step > format_step) { 259046d1c03cSJan Höppner fdata->stop_unit = 259146d1c03cSJan Höppner fdata->start_unit + format_step - 1; 259246d1c03cSJan Höppner } 2593d42e1712SStefan Haberland 2594570d237cSJan Höppner cqr = dasd_eckd_format_build_ccw_req(base, fdata, 25958fd57520SJan Höppner enable_pav, tpm, 25968fd57520SJan Höppner fmt_buffer, rpt); 2597d42e1712SStefan Haberland if (IS_ERR(cqr)) { 259846d1c03cSJan Höppner rc = PTR_ERR(cqr); 259946d1c03cSJan Höppner if (rc == -ENOMEM) { 260046d1c03cSJan Höppner if (list_empty(&format_queue)) 260146d1c03cSJan Höppner goto out; 2602d42e1712SStefan Haberland /* 260346d1c03cSJan Höppner * not enough memory available, start 260446d1c03cSJan Höppner * requests retry after first requests 260546d1c03cSJan Höppner * were finished 2606d42e1712SStefan Haberland */ 260746d1c03cSJan Höppner retry = 1; 260846d1c03cSJan Höppner break; 2609d42e1712SStefan Haberland } 261046d1c03cSJan Höppner goto out_err; 261146d1c03cSJan Höppner } 261246d1c03cSJan Höppner list_add_tail(&cqr->blocklist, &format_queue); 2613d42e1712SStefan Haberland 26148fd57520SJan Höppner if (fmt_buffer) { 26158fd57520SJan Höppner step = fdata->stop_unit - fdata->start_unit + 1; 26168fd57520SJan Höppner fmt_buffer += rpt * step; 26178fd57520SJan Höppner } 2618d42e1712SStefan Haberland fdata->start_unit = fdata->stop_unit + 1; 2619d42e1712SStefan Haberland fdata->stop_unit = old_stop; 2620d42e1712SStefan Haberland } 2621d42e1712SStefan Haberland 262246d1c03cSJan Höppner rc = dasd_sleep_on_queue(&format_queue); 2623d42e1712SStefan Haberland 262446d1c03cSJan Höppner out_err: 2625d42e1712SStefan Haberland list_for_each_entry_safe(cqr, n, &format_queue, blocklist) { 2626d42e1712SStefan Haberland device = cqr->startdev; 2627543691a4SSebastian Ott private = device->private; 26288fd57520SJan Höppner 26298fd57520SJan Höppner if (cqr->status == DASD_CQR_FAILED) { 26308fd57520SJan Höppner /* 26318fd57520SJan Höppner * Only get sense data if called by format 26328fd57520SJan Höppner * check 26338fd57520SJan Höppner */ 26348fd57520SJan Höppner if (fmt_buffer && irb) { 26358fd57520SJan Höppner sense = dasd_get_sense(&cqr->irb); 26368fd57520SJan Höppner memcpy(irb, &cqr->irb, sizeof(*irb)); 26378fd57520SJan Höppner } 2638d42e1712SStefan Haberland rc = -EIO; 26398fd57520SJan Höppner } 2640d42e1712SStefan Haberland list_del_init(&cqr->blocklist); 2641d42e1712SStefan Haberland dasd_sfree_request(cqr, device); 2642d42e1712SStefan Haberland private->count--; 2643d42e1712SStefan Haberland } 2644d42e1712SStefan Haberland 26458fd57520SJan Höppner if (rc && rc != -EIO) 264646d1c03cSJan Höppner goto out; 26478fd57520SJan Höppner if (rc == -EIO) { 26488fd57520SJan Höppner /* 26498fd57520SJan Höppner * In case fewer than the expected records are on the 26508fd57520SJan Höppner * track, we will most likely get a 'No Record Found' 26518fd57520SJan Höppner * error (in command mode) or a 'File Protected' error 26528fd57520SJan Höppner * (in transport mode). Those particular cases shouldn't 26538fd57520SJan Höppner * pass the -EIO to the IOCTL, therefore reset the rc 26548fd57520SJan Höppner * and continue. 26558fd57520SJan Höppner */ 26568fd57520SJan Höppner if (sense && 26578fd57520SJan Höppner (sense[1] & SNS1_NO_REC_FOUND || 26588fd57520SJan Höppner sense[1] & SNS1_FILE_PROTECTED)) 26598fd57520SJan Höppner retry = 1; 26608fd57520SJan Höppner else 26618fd57520SJan Höppner goto out; 26628fd57520SJan Höppner } 266329b8dd9dSStefan Haberland 266446d1c03cSJan Höppner } while (retry); 266546d1c03cSJan Höppner 266646d1c03cSJan Höppner out: 266746d1c03cSJan Höppner fdata->start_unit = old_start; 266846d1c03cSJan Höppner fdata->stop_unit = old_stop; 2669d42e1712SStefan Haberland 2670d42e1712SStefan Haberland return rc; 2671d42e1712SStefan Haberland } 2672d42e1712SStefan Haberland 2673570d237cSJan Höppner static int dasd_eckd_format_device(struct dasd_device *base, 2674570d237cSJan Höppner struct format_data_t *fdata, int enable_pav) 2675570d237cSJan Höppner { 26768fd57520SJan Höppner return dasd_eckd_format_process_data(base, fdata, enable_pav, 0, NULL, 26778fd57520SJan Höppner 0, NULL); 26788fd57520SJan Höppner } 26798fd57520SJan Höppner 26808fd57520SJan Höppner /* 26818fd57520SJan Höppner * Helper function to count consecutive records of a single track. 26828fd57520SJan Höppner */ 26838fd57520SJan Höppner static int dasd_eckd_count_records(struct eckd_count *fmt_buffer, int start, 26848fd57520SJan Höppner int max) 26858fd57520SJan Höppner { 26868fd57520SJan Höppner int head; 26878fd57520SJan Höppner int i; 26888fd57520SJan Höppner 26898fd57520SJan Höppner head = fmt_buffer[start].head; 26908fd57520SJan Höppner 26918fd57520SJan Höppner /* 26928fd57520SJan Höppner * There are 3 conditions where we stop counting: 26938fd57520SJan Höppner * - if data reoccurs (same head and record may reoccur), which may 26948fd57520SJan Höppner * happen due to the way DASD_ECKD_CCW_READ_COUNT works 26958fd57520SJan Höppner * - when the head changes, because we're iterating over several tracks 26968fd57520SJan Höppner * then (DASD_ECKD_CCW_READ_COUNT_MT) 26978fd57520SJan Höppner * - when we've reached the end of sensible data in the buffer (the 26988fd57520SJan Höppner * record will be 0 then) 26998fd57520SJan Höppner */ 27008fd57520SJan Höppner for (i = start; i < max; i++) { 27018fd57520SJan Höppner if (i > start) { 27028fd57520SJan Höppner if ((fmt_buffer[i].head == head && 27038fd57520SJan Höppner fmt_buffer[i].record == 1) || 27048fd57520SJan Höppner fmt_buffer[i].head != head || 27058fd57520SJan Höppner fmt_buffer[i].record == 0) 27068fd57520SJan Höppner break; 27078fd57520SJan Höppner } 27088fd57520SJan Höppner } 27098fd57520SJan Höppner 27108fd57520SJan Höppner return i - start; 27118fd57520SJan Höppner } 27128fd57520SJan Höppner 27138fd57520SJan Höppner /* 27148fd57520SJan Höppner * Evaluate a given range of tracks. Data like number of records, blocksize, 27158fd57520SJan Höppner * record ids, and key length are compared with expected data. 27168fd57520SJan Höppner * 27178fd57520SJan Höppner * If a mismatch occurs, the corresponding error bit is set, as well as 27188fd57520SJan Höppner * additional information, depending on the error. 27198fd57520SJan Höppner */ 27208fd57520SJan Höppner static void dasd_eckd_format_evaluate_tracks(struct eckd_count *fmt_buffer, 27218fd57520SJan Höppner struct format_check_t *cdata, 27228fd57520SJan Höppner int rpt_max, int rpt_exp, 27238fd57520SJan Höppner int trk_per_cyl, int tpm) 27248fd57520SJan Höppner { 27258fd57520SJan Höppner struct ch_t geo; 27268fd57520SJan Höppner int max_entries; 27278fd57520SJan Höppner int count = 0; 27288fd57520SJan Höppner int trkcount; 27298fd57520SJan Höppner int blksize; 27308fd57520SJan Höppner int pos = 0; 27318fd57520SJan Höppner int i, j; 27328fd57520SJan Höppner int kl; 27338fd57520SJan Höppner 27348fd57520SJan Höppner trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; 27358fd57520SJan Höppner max_entries = trkcount * rpt_max; 27368fd57520SJan Höppner 27378fd57520SJan Höppner for (i = cdata->expect.start_unit; i <= cdata->expect.stop_unit; i++) { 27388fd57520SJan Höppner /* Calculate the correct next starting position in the buffer */ 27398fd57520SJan Höppner if (tpm) { 27408fd57520SJan Höppner while (fmt_buffer[pos].record == 0 && 27418fd57520SJan Höppner fmt_buffer[pos].dl == 0) { 27428fd57520SJan Höppner if (pos++ > max_entries) 27438fd57520SJan Höppner break; 27448fd57520SJan Höppner } 27458fd57520SJan Höppner } else { 27468fd57520SJan Höppner if (i != cdata->expect.start_unit) 27478fd57520SJan Höppner pos += rpt_max - count; 27488fd57520SJan Höppner } 27498fd57520SJan Höppner 27508fd57520SJan Höppner /* Calculate the expected geo values for the current track */ 27518fd57520SJan Höppner set_ch_t(&geo, i / trk_per_cyl, i % trk_per_cyl); 27528fd57520SJan Höppner 27538fd57520SJan Höppner /* Count and check number of records */ 27548fd57520SJan Höppner count = dasd_eckd_count_records(fmt_buffer, pos, pos + rpt_max); 27558fd57520SJan Höppner 27568fd57520SJan Höppner if (count < rpt_exp) { 27578fd57520SJan Höppner cdata->result = DASD_FMT_ERR_TOO_FEW_RECORDS; 27588fd57520SJan Höppner break; 27598fd57520SJan Höppner } 27608fd57520SJan Höppner if (count > rpt_exp) { 27618fd57520SJan Höppner cdata->result = DASD_FMT_ERR_TOO_MANY_RECORDS; 27628fd57520SJan Höppner break; 27638fd57520SJan Höppner } 27648fd57520SJan Höppner 27658fd57520SJan Höppner for (j = 0; j < count; j++, pos++) { 27668fd57520SJan Höppner blksize = cdata->expect.blksize; 27678fd57520SJan Höppner kl = 0; 27688fd57520SJan Höppner 27698fd57520SJan Höppner /* 27708fd57520SJan Höppner * Set special values when checking CDL formatted 27718fd57520SJan Höppner * devices. 27728fd57520SJan Höppner */ 27738fd57520SJan Höppner if ((cdata->expect.intensity & 0x08) && 27748fd57520SJan Höppner geo.cyl == 0 && geo.head == 0) { 27758fd57520SJan Höppner if (j < 3) { 27768fd57520SJan Höppner blksize = sizes_trk0[j] - 4; 27778fd57520SJan Höppner kl = 4; 27788fd57520SJan Höppner } 27798fd57520SJan Höppner } 27808fd57520SJan Höppner if ((cdata->expect.intensity & 0x08) && 27818fd57520SJan Höppner geo.cyl == 0 && geo.head == 1) { 27828fd57520SJan Höppner blksize = LABEL_SIZE - 44; 27838fd57520SJan Höppner kl = 44; 27848fd57520SJan Höppner } 27858fd57520SJan Höppner 27868fd57520SJan Höppner /* Check blocksize */ 27878fd57520SJan Höppner if (fmt_buffer[pos].dl != blksize) { 27888fd57520SJan Höppner cdata->result = DASD_FMT_ERR_BLKSIZE; 27898fd57520SJan Höppner goto out; 27908fd57520SJan Höppner } 27918fd57520SJan Höppner /* Check if key length is 0 */ 27928fd57520SJan Höppner if (fmt_buffer[pos].kl != kl) { 27938fd57520SJan Höppner cdata->result = DASD_FMT_ERR_KEY_LENGTH; 27948fd57520SJan Höppner goto out; 27958fd57520SJan Höppner } 27968fd57520SJan Höppner /* Check if record_id is correct */ 27978fd57520SJan Höppner if (fmt_buffer[pos].cyl != geo.cyl || 27988fd57520SJan Höppner fmt_buffer[pos].head != geo.head || 27998fd57520SJan Höppner fmt_buffer[pos].record != (j + 1)) { 28008fd57520SJan Höppner cdata->result = DASD_FMT_ERR_RECORD_ID; 28018fd57520SJan Höppner goto out; 28028fd57520SJan Höppner } 28038fd57520SJan Höppner } 28048fd57520SJan Höppner } 28058fd57520SJan Höppner 28068fd57520SJan Höppner out: 28078fd57520SJan Höppner /* 28088fd57520SJan Höppner * In case of no errors, we need to decrease by one 28098fd57520SJan Höppner * to get the correct positions. 28108fd57520SJan Höppner */ 28118fd57520SJan Höppner if (!cdata->result) { 28128fd57520SJan Höppner i--; 28138fd57520SJan Höppner pos--; 28148fd57520SJan Höppner } 28158fd57520SJan Höppner 28168fd57520SJan Höppner cdata->unit = i; 28178fd57520SJan Höppner cdata->num_records = count; 28188fd57520SJan Höppner cdata->rec = fmt_buffer[pos].record; 28198fd57520SJan Höppner cdata->blksize = fmt_buffer[pos].dl; 28208fd57520SJan Höppner cdata->key_length = fmt_buffer[pos].kl; 28218fd57520SJan Höppner } 28228fd57520SJan Höppner 28238fd57520SJan Höppner /* 28248fd57520SJan Höppner * Check the format of a range of tracks of a DASD. 28258fd57520SJan Höppner */ 28268fd57520SJan Höppner static int dasd_eckd_check_device_format(struct dasd_device *base, 28278fd57520SJan Höppner struct format_check_t *cdata, 28288fd57520SJan Höppner int enable_pav) 28298fd57520SJan Höppner { 28308fd57520SJan Höppner struct dasd_eckd_private *private = base->private; 28318fd57520SJan Höppner struct eckd_count *fmt_buffer; 28328fd57520SJan Höppner struct irb irb; 28338fd57520SJan Höppner int rpt_max, rpt_exp; 28348fd57520SJan Höppner int fmt_buffer_size; 28358fd57520SJan Höppner int trk_per_cyl; 28368fd57520SJan Höppner int trkcount; 28378fd57520SJan Höppner int tpm = 0; 28388fd57520SJan Höppner int rc; 28398fd57520SJan Höppner 28408fd57520SJan Höppner trk_per_cyl = private->rdc_data.trk_per_cyl; 28418fd57520SJan Höppner 28428fd57520SJan Höppner /* Get maximum and expected amount of records per track */ 28438fd57520SJan Höppner rpt_max = recs_per_track(&private->rdc_data, 0, 512) + 1; 28448fd57520SJan Höppner rpt_exp = recs_per_track(&private->rdc_data, 0, cdata->expect.blksize); 28458fd57520SJan Höppner 28468fd57520SJan Höppner trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; 28478fd57520SJan Höppner fmt_buffer_size = trkcount * rpt_max * sizeof(struct eckd_count); 28488fd57520SJan Höppner 28498fd57520SJan Höppner fmt_buffer = kzalloc(fmt_buffer_size, GFP_KERNEL | GFP_DMA); 28508fd57520SJan Höppner if (!fmt_buffer) 28518fd57520SJan Höppner return -ENOMEM; 28528fd57520SJan Höppner 28538fd57520SJan Höppner /* 28548fd57520SJan Höppner * A certain FICON feature subset is needed to operate in transport 28558fd57520SJan Höppner * mode. Additionally, the support for transport mode is implicitly 28568fd57520SJan Höppner * checked by comparing the buffer size with fcx_max_data. As long as 28578fd57520SJan Höppner * the buffer size is smaller we can operate in transport mode and 28588fd57520SJan Höppner * process multiple tracks. If not, only one track at once is being 28598fd57520SJan Höppner * processed using command mode. 28608fd57520SJan Höppner */ 28618fd57520SJan Höppner if ((private->features.feature[40] & 0x04) && 28628fd57520SJan Höppner fmt_buffer_size <= private->fcx_max_data) 28638fd57520SJan Höppner tpm = 1; 28648fd57520SJan Höppner 28658fd57520SJan Höppner rc = dasd_eckd_format_process_data(base, &cdata->expect, enable_pav, 28668fd57520SJan Höppner tpm, fmt_buffer, rpt_max, &irb); 28678fd57520SJan Höppner if (rc && rc != -EIO) 28688fd57520SJan Höppner goto out; 28698fd57520SJan Höppner if (rc == -EIO) { 28708fd57520SJan Höppner /* 28718fd57520SJan Höppner * If our first attempt with transport mode enabled comes back 28728fd57520SJan Höppner * with an incorrect length error, we're going to retry the 28738fd57520SJan Höppner * check with command mode. 28748fd57520SJan Höppner */ 28758fd57520SJan Höppner if (tpm && scsw_cstat(&irb.scsw) == 0x40) { 28768fd57520SJan Höppner tpm = 0; 28778fd57520SJan Höppner rc = dasd_eckd_format_process_data(base, &cdata->expect, 28788fd57520SJan Höppner enable_pav, tpm, 28798fd57520SJan Höppner fmt_buffer, rpt_max, 28808fd57520SJan Höppner &irb); 28818fd57520SJan Höppner if (rc) 28828fd57520SJan Höppner goto out; 28838fd57520SJan Höppner } else { 28848fd57520SJan Höppner goto out; 28858fd57520SJan Höppner } 28868fd57520SJan Höppner } 28878fd57520SJan Höppner 28888fd57520SJan Höppner dasd_eckd_format_evaluate_tracks(fmt_buffer, cdata, rpt_max, rpt_exp, 28898fd57520SJan Höppner trk_per_cyl, tpm); 28908fd57520SJan Höppner 28918fd57520SJan Höppner out: 28928fd57520SJan Höppner kfree(fmt_buffer); 28938fd57520SJan Höppner 28948fd57520SJan Höppner return rc; 2895570d237cSJan Höppner } 2896570d237cSJan Höppner 28978e09f215SStefan Weinhuber static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 28981da177e4SLinus Torvalds { 2899a2ace466SHannes Reinecke if (cqr->retries < 0) { 2900a2ace466SHannes Reinecke cqr->status = DASD_CQR_FAILED; 2901a2ace466SHannes Reinecke return; 2902a2ace466SHannes Reinecke } 29038e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 29048e09f215SStefan Weinhuber if (cqr->block && (cqr->startdev != cqr->block->base)) { 29058e09f215SStefan Weinhuber dasd_eckd_reset_ccw_to_base_io(cqr); 29068e09f215SStefan Weinhuber cqr->startdev = cqr->block->base; 2907c9346151SStefan Haberland cqr->lpm = dasd_path_get_opm(cqr->block->base); 29081da177e4SLinus Torvalds } 29098e09f215SStefan Weinhuber }; 29101da177e4SLinus Torvalds 29111da177e4SLinus Torvalds static dasd_erp_fn_t 29121da177e4SLinus Torvalds dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 29131da177e4SLinus Torvalds { 29148e09f215SStefan Weinhuber struct dasd_device *device = (struct dasd_device *) cqr->startdev; 29151da177e4SLinus Torvalds struct ccw_device *cdev = device->cdev; 29161da177e4SLinus Torvalds 29171da177e4SLinus Torvalds switch (cdev->id.cu_type) { 29181da177e4SLinus Torvalds case 0x3990: 29191da177e4SLinus Torvalds case 0x2105: 29201da177e4SLinus Torvalds case 0x2107: 29211da177e4SLinus Torvalds case 0x1750: 29221da177e4SLinus Torvalds return dasd_3990_erp_action; 29231da177e4SLinus Torvalds case 0x9343: 29241da177e4SLinus Torvalds case 0x3880: 29251da177e4SLinus Torvalds default: 29261da177e4SLinus Torvalds return dasd_default_erp_action; 29271da177e4SLinus Torvalds } 29281da177e4SLinus Torvalds } 29291da177e4SLinus Torvalds 29301da177e4SLinus Torvalds static dasd_erp_fn_t 29311da177e4SLinus Torvalds dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 29321da177e4SLinus Torvalds { 29331da177e4SLinus Torvalds return dasd_default_erp_postaction; 29341da177e4SLinus Torvalds } 29351da177e4SLinus Torvalds 29365a27e60dSStefan Weinhuber static void dasd_eckd_check_for_device_change(struct dasd_device *device, 29375a27e60dSStefan Weinhuber struct dasd_ccw_req *cqr, 29388e09f215SStefan Weinhuber struct irb *irb) 29398e09f215SStefan Weinhuber { 29408e09f215SStefan Weinhuber char mask; 2941f3eb5384SStefan Weinhuber char *sense = NULL; 2942543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 29438e09f215SStefan Weinhuber 29448e09f215SStefan Weinhuber /* first of all check for state change pending interrupt */ 29458e09f215SStefan Weinhuber mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 2946f3eb5384SStefan Weinhuber if ((scsw_dstat(&irb->scsw) & mask) == mask) { 2947c8d1c0ffSStefan Haberland /* 2948c8d1c0ffSStefan Haberland * for alias only, not in offline processing 2949c8d1c0ffSStefan Haberland * and only if not suspended 2950c8d1c0ffSStefan Haberland */ 2951501183f2SStefan Haberland if (!device->block && private->lcu && 295225e2cf1cSStefan Haberland device->state == DASD_STATE_ONLINE && 2953c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_OFFLINE, &device->flags) && 2954c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 2955501183f2SStefan Haberland /* schedule worker to reload device */ 2956501183f2SStefan Haberland dasd_reload_device(device); 2957501183f2SStefan Haberland } 29588e09f215SStefan Weinhuber dasd_generic_handle_state_change(device); 29598e09f215SStefan Weinhuber return; 29608e09f215SStefan Weinhuber } 29618e09f215SStefan Weinhuber 2962a5a0061fSStefan Weinhuber sense = dasd_get_sense(irb); 29635a27e60dSStefan Weinhuber if (!sense) 29645a27e60dSStefan Weinhuber return; 29655a27e60dSStefan Weinhuber 29665a27e60dSStefan Weinhuber /* summary unit check */ 2967c7a29e56SStefan Weinhuber if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) && 2968a5a0061fSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { 296959a9ed5fSStefan Haberland if (test_and_set_bit(DASD_FLAG_SUC, &device->flags)) { 297059a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 297159a9ed5fSStefan Haberland "eckd suc: device already notified"); 297259a9ed5fSStefan Haberland return; 297359a9ed5fSStefan Haberland } 297459a9ed5fSStefan Haberland sense = dasd_get_sense(irb); 297559a9ed5fSStefan Haberland if (!sense) { 297659a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 297759a9ed5fSStefan Haberland "eckd suc: no reason code available"); 297859a9ed5fSStefan Haberland clear_bit(DASD_FLAG_SUC, &device->flags); 297959a9ed5fSStefan Haberland return; 298059a9ed5fSStefan Haberland 298159a9ed5fSStefan Haberland } 298259a9ed5fSStefan Haberland private->suc_reason = sense[8]; 298359a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_NOTICE, device, "%s %x", 298459a9ed5fSStefan Haberland "eckd handle summary unit check: reason", 298559a9ed5fSStefan Haberland private->suc_reason); 298659a9ed5fSStefan Haberland dasd_get_device(device); 298759a9ed5fSStefan Haberland if (!schedule_work(&device->suc_work)) 298859a9ed5fSStefan Haberland dasd_put_device(device); 298959a9ed5fSStefan Haberland 29908e09f215SStefan Weinhuber return; 29918e09f215SStefan Weinhuber } 29928e09f215SStefan Weinhuber 2993f60c768cSStefan Haberland /* service information message SIM */ 29945a27e60dSStefan Weinhuber if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && 2995f3eb5384SStefan Weinhuber ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 2996f3eb5384SStefan Weinhuber dasd_3990_erp_handle_sim(device, sense); 2997f60c768cSStefan Haberland return; 2998f60c768cSStefan Haberland } 2999f60c768cSStefan Haberland 30005a27e60dSStefan Weinhuber /* loss of device reservation is handled via base devices only 30015a27e60dSStefan Weinhuber * as alias devices may be used with several bases 30025a27e60dSStefan Weinhuber */ 3003c7a29e56SStefan Weinhuber if (device->block && (sense[27] & DASD_SENSE_BIT_0) && 3004c7a29e56SStefan Weinhuber (sense[7] == 0x3F) && 30055a27e60dSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && 30065a27e60dSStefan Weinhuber test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { 30075a27e60dSStefan Weinhuber if (device->features & DASD_FEATURE_FAILONSLCK) 30085a27e60dSStefan Weinhuber set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); 30095a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 30105a27e60dSStefan Weinhuber dev_err(&device->cdev->dev, 30115a27e60dSStefan Weinhuber "The device reservation was lost\n"); 3012ada3df91SStefan Haberland } 30135a27e60dSStefan Weinhuber } 3014f3eb5384SStefan Weinhuber 3015f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( 3016f3eb5384SStefan Weinhuber struct dasd_device *startdev, 30178e09f215SStefan Weinhuber struct dasd_block *block, 3018f3eb5384SStefan Weinhuber struct request *req, 3019f3eb5384SStefan Weinhuber sector_t first_rec, 3020f3eb5384SStefan Weinhuber sector_t last_rec, 3021f3eb5384SStefan Weinhuber sector_t first_trk, 3022f3eb5384SStefan Weinhuber sector_t last_trk, 3023f3eb5384SStefan Weinhuber unsigned int first_offs, 3024f3eb5384SStefan Weinhuber unsigned int last_offs, 3025f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 3026f3eb5384SStefan Weinhuber unsigned int blksize) 30271da177e4SLinus Torvalds { 30281da177e4SLinus Torvalds struct dasd_eckd_private *private; 30291da177e4SLinus Torvalds unsigned long *idaws; 30301da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 30311da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 30321da177e4SLinus Torvalds struct ccw1 *ccw; 30335705f702SNeilBrown struct req_iterator iter; 30347988613bSKent Overstreet struct bio_vec bv; 30351da177e4SLinus Torvalds char *dst; 3036f3eb5384SStefan Weinhuber unsigned int off; 30371da177e4SLinus Torvalds int count, cidaw, cplength, datasize; 3038f3eb5384SStefan Weinhuber sector_t recid; 30391da177e4SLinus Torvalds unsigned char cmd, rcmd; 30408e09f215SStefan Weinhuber int use_prefix; 30418e09f215SStefan Weinhuber struct dasd_device *basedev; 30421da177e4SLinus Torvalds 30438e09f215SStefan Weinhuber basedev = block->base; 3044543691a4SSebastian Ott private = basedev->private; 30451da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 30461da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_READ_MT; 30471da177e4SLinus Torvalds else if (rq_data_dir(req) == WRITE) 30481da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_WRITE_MT; 30491da177e4SLinus Torvalds else 30501da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 3051f3eb5384SStefan Weinhuber 30521da177e4SLinus Torvalds /* Check struct bio and count the number of blocks for the request. */ 30531da177e4SLinus Torvalds count = 0; 30541da177e4SLinus Torvalds cidaw = 0; 30555705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 30567988613bSKent Overstreet if (bv.bv_len & (blksize - 1)) 30571da177e4SLinus Torvalds /* Eckd can only do full blocks. */ 30581da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 30597988613bSKent Overstreet count += bv.bv_len >> (block->s2b_shift + 9); 30607988613bSKent Overstreet if (idal_is_needed (page_address(bv.bv_page), bv.bv_len)) 30617988613bSKent Overstreet cidaw += bv.bv_len >> (block->s2b_shift + 9); 30621da177e4SLinus Torvalds } 30631da177e4SLinus Torvalds /* Paranoia. */ 30641da177e4SLinus Torvalds if (count != last_rec - first_rec + 1) 30651da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 30668e09f215SStefan Weinhuber 30678e09f215SStefan Weinhuber /* use the prefix command if available */ 30688e09f215SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 30698e09f215SStefan Weinhuber if (use_prefix) { 30708e09f215SStefan Weinhuber /* 1x prefix + number of blocks */ 30718e09f215SStefan Weinhuber cplength = 2 + count; 30728e09f215SStefan Weinhuber /* 1x prefix + cidaws*sizeof(long) */ 30738e09f215SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 30748e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 30758e09f215SStefan Weinhuber cidaw * sizeof(unsigned long); 30768e09f215SStefan Weinhuber } else { 30771da177e4SLinus Torvalds /* 1x define extent + 1x locate record + number of blocks */ 30781da177e4SLinus Torvalds cplength = 2 + count; 30791da177e4SLinus Torvalds /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 30808e09f215SStefan Weinhuber datasize = sizeof(struct DE_eckd_data) + 30818e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 30821da177e4SLinus Torvalds cidaw * sizeof(unsigned long); 30838e09f215SStefan Weinhuber } 30841da177e4SLinus Torvalds /* Find out the number of additional locate record ccws for cdl. */ 30851da177e4SLinus Torvalds if (private->uses_cdl && first_rec < 2*blk_per_trk) { 30861da177e4SLinus Torvalds if (last_rec >= 2*blk_per_trk) 30871da177e4SLinus Torvalds count = 2*blk_per_trk - first_rec; 30881da177e4SLinus Torvalds cplength += count; 30891da177e4SLinus Torvalds datasize += count*sizeof(struct LO_eckd_data); 30901da177e4SLinus Torvalds } 30911da177e4SLinus Torvalds /* Allocate the ccw request. */ 309268b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 3093c5205f2fSSebastian Ott startdev, blk_mq_rq_to_pdu(req)); 30941da177e4SLinus Torvalds if (IS_ERR(cqr)) 30951da177e4SLinus Torvalds return cqr; 30961da177e4SLinus Torvalds ccw = cqr->cpaddr; 30978e09f215SStefan Weinhuber /* First ccw is define extent or prefix. */ 30988e09f215SStefan Weinhuber if (use_prefix) { 30998e09f215SStefan Weinhuber if (prefix(ccw++, cqr->data, first_trk, 31008e09f215SStefan Weinhuber last_trk, cmd, basedev, startdev) == -EAGAIN) { 31018e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 31028e09f215SStefan Weinhuber * Try again later. 31038e09f215SStefan Weinhuber */ 31048e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 3105d54853efSMartin Schwidefsky return ERR_PTR(-EAGAIN); 3106d54853efSMartin Schwidefsky } 31078e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 31088e09f215SStefan Weinhuber sizeof(struct PFX_eckd_data)); 31098e09f215SStefan Weinhuber } else { 31108e09f215SStefan Weinhuber if (define_extent(ccw++, cqr->data, first_trk, 311145f186beSJan Höppner last_trk, cmd, basedev, 0) == -EAGAIN) { 31128e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 31138e09f215SStefan Weinhuber * Try again later. 31148e09f215SStefan Weinhuber */ 31158e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 31168e09f215SStefan Weinhuber return ERR_PTR(-EAGAIN); 31178e09f215SStefan Weinhuber } 31188e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 31198e09f215SStefan Weinhuber sizeof(struct DE_eckd_data)); 31208e09f215SStefan Weinhuber } 31211da177e4SLinus Torvalds /* Build locate_record+read/write/ccws. */ 31221da177e4SLinus Torvalds LO_data = (struct LO_eckd_data *) (idaws + cidaw); 31231da177e4SLinus Torvalds recid = first_rec; 31241da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 31251da177e4SLinus Torvalds /* Only standard blocks so there is just one locate record. */ 31261da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 31271da177e4SLinus Torvalds locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 31288e09f215SStefan Weinhuber last_rec - recid + 1, cmd, basedev, blksize); 31291da177e4SLinus Torvalds } 31305705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 31317988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 31321da177e4SLinus Torvalds if (dasd_page_cache) { 31331da177e4SLinus Torvalds char *copy = kmem_cache_alloc(dasd_page_cache, 3134441e143eSChristoph Lameter GFP_DMA | __GFP_NOWARN); 31351da177e4SLinus Torvalds if (copy && rq_data_dir(req) == WRITE) 31367988613bSKent Overstreet memcpy(copy + bv.bv_offset, dst, bv.bv_len); 31371da177e4SLinus Torvalds if (copy) 31387988613bSKent Overstreet dst = copy + bv.bv_offset; 31391da177e4SLinus Torvalds } 31407988613bSKent Overstreet for (off = 0; off < bv.bv_len; off += blksize) { 31411da177e4SLinus Torvalds sector_t trkid = recid; 31421da177e4SLinus Torvalds unsigned int recoffs = sector_div(trkid, blk_per_trk); 31431da177e4SLinus Torvalds rcmd = cmd; 31441da177e4SLinus Torvalds count = blksize; 31451da177e4SLinus Torvalds /* Locate record for cdl special block ? */ 31461da177e4SLinus Torvalds if (private->uses_cdl && recid < 2*blk_per_trk) { 31471da177e4SLinus Torvalds if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 31481da177e4SLinus Torvalds rcmd |= 0x8; 31491da177e4SLinus Torvalds count = dasd_eckd_cdl_reclen(recid); 3150ec5883abSHorst Hummel if (count < blksize && 3151ec5883abSHorst Hummel rq_data_dir(req) == READ) 31521da177e4SLinus Torvalds memset(dst + count, 0xe5, 31531da177e4SLinus Torvalds blksize - count); 31541da177e4SLinus Torvalds } 31551da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 31561da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 31571da177e4SLinus Torvalds trkid, recoffs + 1, 31588e09f215SStefan Weinhuber 1, rcmd, basedev, count); 31591da177e4SLinus Torvalds } 31601da177e4SLinus Torvalds /* Locate record for standard blocks ? */ 31611da177e4SLinus Torvalds if (private->uses_cdl && recid == 2*blk_per_trk) { 31621da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 31631da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 31641da177e4SLinus Torvalds trkid, recoffs + 1, 31651da177e4SLinus Torvalds last_rec - recid + 1, 31668e09f215SStefan Weinhuber cmd, basedev, count); 31671da177e4SLinus Torvalds } 31681da177e4SLinus Torvalds /* Read/write ccw. */ 31691da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 31701da177e4SLinus Torvalds ccw->cmd_code = rcmd; 31711da177e4SLinus Torvalds ccw->count = count; 31721da177e4SLinus Torvalds if (idal_is_needed(dst, blksize)) { 31731da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) idaws; 31741da177e4SLinus Torvalds ccw->flags = CCW_FLAG_IDA; 31751da177e4SLinus Torvalds idaws = idal_create_words(idaws, dst, blksize); 31761da177e4SLinus Torvalds } else { 31771da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) dst; 31781da177e4SLinus Torvalds ccw->flags = 0; 31791da177e4SLinus Torvalds } 31801da177e4SLinus Torvalds ccw++; 31811da177e4SLinus Torvalds dst += blksize; 31821da177e4SLinus Torvalds recid++; 31831da177e4SLinus Torvalds } 31841da177e4SLinus Torvalds } 318513de227bSHolger Smolinski if (blk_noretry_request(req) || 318613de227bSHolger Smolinski block->base->features & DASD_FEATURE_FAILFAST) 31871c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 31888e09f215SStefan Weinhuber cqr->startdev = startdev; 31898e09f215SStefan Weinhuber cqr->memdev = startdev; 31908e09f215SStefan Weinhuber cqr->block = block; 31917c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 3192c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 31931f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 31941aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 31951da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 31961da177e4SLinus Torvalds return cqr; 31971da177e4SLinus Torvalds } 31981da177e4SLinus Torvalds 3199f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 3200f3eb5384SStefan Weinhuber struct dasd_device *startdev, 3201f3eb5384SStefan Weinhuber struct dasd_block *block, 3202f3eb5384SStefan Weinhuber struct request *req, 3203f3eb5384SStefan Weinhuber sector_t first_rec, 3204f3eb5384SStefan Weinhuber sector_t last_rec, 3205f3eb5384SStefan Weinhuber sector_t first_trk, 3206f3eb5384SStefan Weinhuber sector_t last_trk, 3207f3eb5384SStefan Weinhuber unsigned int first_offs, 3208f3eb5384SStefan Weinhuber unsigned int last_offs, 3209f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 3210f3eb5384SStefan Weinhuber unsigned int blksize) 3211f3eb5384SStefan Weinhuber { 3212f3eb5384SStefan Weinhuber unsigned long *idaws; 3213f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 3214f3eb5384SStefan Weinhuber struct ccw1 *ccw; 3215f3eb5384SStefan Weinhuber struct req_iterator iter; 32167988613bSKent Overstreet struct bio_vec bv; 3217f3eb5384SStefan Weinhuber char *dst, *idaw_dst; 3218f3eb5384SStefan Weinhuber unsigned int cidaw, cplength, datasize; 3219f3eb5384SStefan Weinhuber unsigned int tlf; 3220f3eb5384SStefan Weinhuber sector_t recid; 3221f3eb5384SStefan Weinhuber unsigned char cmd; 3222f3eb5384SStefan Weinhuber struct dasd_device *basedev; 3223f3eb5384SStefan Weinhuber unsigned int trkcount, count, count_to_trk_end; 3224f3eb5384SStefan Weinhuber unsigned int idaw_len, seg_len, part_len, len_to_track_end; 3225f3eb5384SStefan Weinhuber unsigned char new_track, end_idaw; 3226f3eb5384SStefan Weinhuber sector_t trkid; 3227f3eb5384SStefan Weinhuber unsigned int recoffs; 3228f3eb5384SStefan Weinhuber 3229f3eb5384SStefan Weinhuber basedev = block->base; 3230f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) 3231f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 3232f3eb5384SStefan Weinhuber else if (rq_data_dir(req) == WRITE) 3233f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 3234f3eb5384SStefan Weinhuber else 3235f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 3236f3eb5384SStefan Weinhuber 3237f3eb5384SStefan Weinhuber /* Track based I/O needs IDAWs for each page, and not just for 3238f3eb5384SStefan Weinhuber * 64 bit addresses. We need additional idals for pages 3239f3eb5384SStefan Weinhuber * that get filled from two tracks, so we use the number 3240f3eb5384SStefan Weinhuber * of records as upper limit. 3241f3eb5384SStefan Weinhuber */ 3242f3eb5384SStefan Weinhuber cidaw = last_rec - first_rec + 1; 3243f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 3244f3eb5384SStefan Weinhuber 3245f3eb5384SStefan Weinhuber /* 1x prefix + one read/write ccw per track */ 3246f3eb5384SStefan Weinhuber cplength = 1 + trkcount; 3247f3eb5384SStefan Weinhuber 32487bf76f01SJan Höppner datasize = sizeof(struct PFX_eckd_data) + cidaw * sizeof(unsigned long); 3249f3eb5384SStefan Weinhuber 3250f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 325168b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 3252c5205f2fSSebastian Ott startdev, blk_mq_rq_to_pdu(req)); 3253f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 3254f3eb5384SStefan Weinhuber return cqr; 3255f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 3256f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 3257f3eb5384SStefan Weinhuber if (first_trk == last_trk) 3258f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 3259f3eb5384SStefan Weinhuber else 3260f3eb5384SStefan Weinhuber tlf = last_offs + 1; 3261f3eb5384SStefan Weinhuber tlf *= blksize; 3262f3eb5384SStefan Weinhuber 3263f3eb5384SStefan Weinhuber if (prefix_LRE(ccw++, cqr->data, first_trk, 3264f3eb5384SStefan Weinhuber last_trk, cmd, basedev, startdev, 3265f3eb5384SStefan Weinhuber 1 /* format */, first_offs + 1, 3266f3eb5384SStefan Weinhuber trkcount, blksize, 3267f3eb5384SStefan Weinhuber tlf) == -EAGAIN) { 3268f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 3269f3eb5384SStefan Weinhuber * Try again later. 3270f3eb5384SStefan Weinhuber */ 3271f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 3272f3eb5384SStefan Weinhuber return ERR_PTR(-EAGAIN); 3273f3eb5384SStefan Weinhuber } 3274f3eb5384SStefan Weinhuber 3275f3eb5384SStefan Weinhuber /* 3276f3eb5384SStefan Weinhuber * The translation of request into ccw programs must meet the 3277f3eb5384SStefan Weinhuber * following conditions: 3278f3eb5384SStefan Weinhuber * - all idaws but the first and the last must address full pages 3279f3eb5384SStefan Weinhuber * (or 2K blocks on 31-bit) 3280f3eb5384SStefan Weinhuber * - the scope of a ccw and it's idal ends with the track boundaries 3281f3eb5384SStefan Weinhuber */ 3282f3eb5384SStefan Weinhuber idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); 3283f3eb5384SStefan Weinhuber recid = first_rec; 3284f3eb5384SStefan Weinhuber new_track = 1; 3285f3eb5384SStefan Weinhuber end_idaw = 0; 3286f3eb5384SStefan Weinhuber len_to_track_end = 0; 3287246ccea1SMartin Schwidefsky idaw_dst = NULL; 3288f3eb5384SStefan Weinhuber idaw_len = 0; 3289f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 32907988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 32917988613bSKent Overstreet seg_len = bv.bv_len; 3292f3eb5384SStefan Weinhuber while (seg_len) { 3293f3eb5384SStefan Weinhuber if (new_track) { 3294f3eb5384SStefan Weinhuber trkid = recid; 3295f3eb5384SStefan Weinhuber recoffs = sector_div(trkid, blk_per_trk); 3296f3eb5384SStefan Weinhuber count_to_trk_end = blk_per_trk - recoffs; 3297f3eb5384SStefan Weinhuber count = min((last_rec - recid + 1), 3298f3eb5384SStefan Weinhuber (sector_t)count_to_trk_end); 3299f3eb5384SStefan Weinhuber len_to_track_end = count * blksize; 3300f3eb5384SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 3301f3eb5384SStefan Weinhuber ccw->cmd_code = cmd; 3302f3eb5384SStefan Weinhuber ccw->count = len_to_track_end; 3303f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 3304f3eb5384SStefan Weinhuber ccw->flags = CCW_FLAG_IDA; 3305f3eb5384SStefan Weinhuber ccw++; 3306f3eb5384SStefan Weinhuber recid += count; 3307f3eb5384SStefan Weinhuber new_track = 0; 330852db45c3SStefan Weinhuber /* first idaw for a ccw may start anywhere */ 330952db45c3SStefan Weinhuber if (!idaw_dst) 331052db45c3SStefan Weinhuber idaw_dst = dst; 3311f3eb5384SStefan Weinhuber } 331252db45c3SStefan Weinhuber /* If we start a new idaw, we must make sure that it 331352db45c3SStefan Weinhuber * starts on an IDA_BLOCK_SIZE boundary. 3314f3eb5384SStefan Weinhuber * If we continue an idaw, we must make sure that the 3315f3eb5384SStefan Weinhuber * current segment begins where the so far accumulated 3316f3eb5384SStefan Weinhuber * idaw ends 3317f3eb5384SStefan Weinhuber */ 331852db45c3SStefan Weinhuber if (!idaw_dst) { 331952db45c3SStefan Weinhuber if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { 332052db45c3SStefan Weinhuber dasd_sfree_request(cqr, startdev); 332152db45c3SStefan Weinhuber return ERR_PTR(-ERANGE); 332252db45c3SStefan Weinhuber } else 3323f3eb5384SStefan Weinhuber idaw_dst = dst; 332452db45c3SStefan Weinhuber } 3325f3eb5384SStefan Weinhuber if ((idaw_dst + idaw_len) != dst) { 3326f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 3327f3eb5384SStefan Weinhuber return ERR_PTR(-ERANGE); 3328f3eb5384SStefan Weinhuber } 3329f3eb5384SStefan Weinhuber part_len = min(seg_len, len_to_track_end); 3330f3eb5384SStefan Weinhuber seg_len -= part_len; 3331f3eb5384SStefan Weinhuber dst += part_len; 3332f3eb5384SStefan Weinhuber idaw_len += part_len; 3333f3eb5384SStefan Weinhuber len_to_track_end -= part_len; 3334f3eb5384SStefan Weinhuber /* collected memory area ends on an IDA_BLOCK border, 3335f3eb5384SStefan Weinhuber * -> create an idaw 3336f3eb5384SStefan Weinhuber * idal_create_words will handle cases where idaw_len 3337f3eb5384SStefan Weinhuber * is larger then IDA_BLOCK_SIZE 3338f3eb5384SStefan Weinhuber */ 3339f3eb5384SStefan Weinhuber if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) 3340f3eb5384SStefan Weinhuber end_idaw = 1; 3341f3eb5384SStefan Weinhuber /* We also need to end the idaw at track end */ 3342f3eb5384SStefan Weinhuber if (!len_to_track_end) { 3343f3eb5384SStefan Weinhuber new_track = 1; 3344f3eb5384SStefan Weinhuber end_idaw = 1; 3345f3eb5384SStefan Weinhuber } 3346f3eb5384SStefan Weinhuber if (end_idaw) { 3347f3eb5384SStefan Weinhuber idaws = idal_create_words(idaws, idaw_dst, 3348f3eb5384SStefan Weinhuber idaw_len); 3349246ccea1SMartin Schwidefsky idaw_dst = NULL; 3350f3eb5384SStefan Weinhuber idaw_len = 0; 3351f3eb5384SStefan Weinhuber end_idaw = 0; 3352f3eb5384SStefan Weinhuber } 3353f3eb5384SStefan Weinhuber } 3354f3eb5384SStefan Weinhuber } 3355f3eb5384SStefan Weinhuber 3356f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 3357f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 3358f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3359f3eb5384SStefan Weinhuber cqr->startdev = startdev; 3360f3eb5384SStefan Weinhuber cqr->memdev = startdev; 3361f3eb5384SStefan Weinhuber cqr->block = block; 33627c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 3363c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 33641f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 33651aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 3366f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 3367f3eb5384SStefan Weinhuber return cqr; 3368f3eb5384SStefan Weinhuber } 3369f3eb5384SStefan Weinhuber 3370f3eb5384SStefan Weinhuber static int prepare_itcw(struct itcw *itcw, 3371f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 3372f3eb5384SStefan Weinhuber struct dasd_device *basedev, 3373f3eb5384SStefan Weinhuber struct dasd_device *startdev, 3374f3eb5384SStefan Weinhuber unsigned int rec_on_trk, int count, 3375f3eb5384SStefan Weinhuber unsigned int blksize, 3376f3eb5384SStefan Weinhuber unsigned int total_data_size, 3377f3eb5384SStefan Weinhuber unsigned int tlf, 3378f3eb5384SStefan Weinhuber unsigned int blk_per_trk) 3379f3eb5384SStefan Weinhuber { 3380f3eb5384SStefan Weinhuber struct PFX_eckd_data pfxdata; 3381f3eb5384SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 3382f3eb5384SStefan Weinhuber struct DE_eckd_data *dedata; 3383f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 3384f3eb5384SStefan Weinhuber struct dcw *dcw; 3385f3eb5384SStefan Weinhuber 3386f3eb5384SStefan Weinhuber u32 begcyl, endcyl; 3387f3eb5384SStefan Weinhuber u16 heads, beghead, endhead; 3388f3eb5384SStefan Weinhuber u8 pfx_cmd; 3389f3eb5384SStefan Weinhuber 3390f3eb5384SStefan Weinhuber int rc = 0; 3391f3eb5384SStefan Weinhuber int sector = 0; 3392f3eb5384SStefan Weinhuber int dn, d; 3393f3eb5384SStefan Weinhuber 3394f3eb5384SStefan Weinhuber 3395f3eb5384SStefan Weinhuber /* setup prefix data */ 3396543691a4SSebastian Ott basepriv = basedev->private; 3397543691a4SSebastian Ott startpriv = startdev->private; 3398f3eb5384SStefan Weinhuber dedata = &pfxdata.define_extent; 3399f3eb5384SStefan Weinhuber lredata = &pfxdata.locate_record; 3400f3eb5384SStefan Weinhuber 3401f3eb5384SStefan Weinhuber memset(&pfxdata, 0, sizeof(pfxdata)); 3402f3eb5384SStefan Weinhuber pfxdata.format = 1; /* PFX with LRE */ 3403f3eb5384SStefan Weinhuber pfxdata.base_address = basepriv->ned->unit_addr; 3404f3eb5384SStefan Weinhuber pfxdata.base_lss = basepriv->ned->ID; 3405f3eb5384SStefan Weinhuber pfxdata.validity.define_extent = 1; 3406f3eb5384SStefan Weinhuber 3407f3eb5384SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 3408da340f92SStefan Haberland if (startpriv->uid.type == UA_BASE_PAV_ALIAS) 3409f3eb5384SStefan Weinhuber pfxdata.validity.verify_base = 1; 3410da340f92SStefan Haberland 3411da340f92SStefan Haberland if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) { 3412da340f92SStefan Haberland pfxdata.validity.verify_base = 1; 3413f3eb5384SStefan Weinhuber pfxdata.validity.hyper_pav = 1; 3414f3eb5384SStefan Weinhuber } 3415f3eb5384SStefan Weinhuber 3416f3eb5384SStefan Weinhuber switch (cmd) { 3417f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 3418f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 3419f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 3420f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 3421f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 3422f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 3423f3eb5384SStefan Weinhuber lredata->operation.operation = 0x0C; 3424f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x01; 3425f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX_READ; 3426f3eb5384SStefan Weinhuber break; 3427f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 3428f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 3429f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 3430f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 34315628683cSStefan Haberland rc = set_timestamp(NULL, dedata, basedev); 3432f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 3433f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 3434f3eb5384SStefan Weinhuber lredata->operation.operation = 0x3F; 3435f3eb5384SStefan Weinhuber lredata->extended_operation = 0x23; 3436f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x2; 343745f186beSJan Höppner /* 343845f186beSJan Höppner * If XRC is supported the System Time Stamp is set. The 343945f186beSJan Höppner * validity of the time stamp must be reflected in the prefix 344045f186beSJan Höppner * data as well. 344145f186beSJan Höppner */ 344245f186beSJan Höppner if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02) 344345f186beSJan Höppner pfxdata.validity.time_stamp = 1; /* 'Time Stamp Valid' */ 3444f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX; 3445f3eb5384SStefan Weinhuber break; 34468fd57520SJan Höppner case DASD_ECKD_CCW_READ_COUNT_MT: 34478fd57520SJan Höppner dedata->mask.perm = 0x1; 34488fd57520SJan Höppner dedata->attributes.operation = DASD_BYPASS_CACHE; 34498fd57520SJan Höppner dedata->ga_extended |= 0x42; 34508fd57520SJan Höppner dedata->blk_size = blksize; 34518fd57520SJan Höppner lredata->operation.orientation = 0x2; 34528fd57520SJan Höppner lredata->operation.operation = 0x16; 34538fd57520SJan Höppner lredata->auxiliary.check_bytes = 0x01; 34548fd57520SJan Höppner pfx_cmd = DASD_ECKD_CCW_PFX_READ; 34558fd57520SJan Höppner break; 3456f3eb5384SStefan Weinhuber default: 3457f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 3458f3eb5384SStefan Weinhuber "prepare itcw, unknown opcode 0x%x", cmd); 3459f3eb5384SStefan Weinhuber BUG(); 3460f3eb5384SStefan Weinhuber break; 3461f3eb5384SStefan Weinhuber } 3462f3eb5384SStefan Weinhuber if (rc) 3463f3eb5384SStefan Weinhuber return rc; 3464f3eb5384SStefan Weinhuber 3465f3eb5384SStefan Weinhuber dedata->attributes.mode = 0x3; /* ECKD */ 3466f3eb5384SStefan Weinhuber 3467f3eb5384SStefan Weinhuber heads = basepriv->rdc_data.trk_per_cyl; 3468f3eb5384SStefan Weinhuber begcyl = trk / heads; 3469f3eb5384SStefan Weinhuber beghead = trk % heads; 3470f3eb5384SStefan Weinhuber endcyl = totrk / heads; 3471f3eb5384SStefan Weinhuber endhead = totrk % heads; 3472f3eb5384SStefan Weinhuber 3473f3eb5384SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 3474f3eb5384SStefan Weinhuber if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 3475f3eb5384SStefan Weinhuber dedata->attributes.operation == DASD_SEQ_ACCESS) { 3476f3eb5384SStefan Weinhuber 3477f3eb5384SStefan Weinhuber if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 3478f3eb5384SStefan Weinhuber endcyl += basepriv->attrib.nr_cyl; 3479f3eb5384SStefan Weinhuber else 3480f3eb5384SStefan Weinhuber endcyl = (basepriv->real_cyl - 1); 3481f3eb5384SStefan Weinhuber } 3482f3eb5384SStefan Weinhuber 3483f3eb5384SStefan Weinhuber set_ch_t(&dedata->beg_ext, begcyl, beghead); 3484f3eb5384SStefan Weinhuber set_ch_t(&dedata->end_ext, endcyl, endhead); 3485f3eb5384SStefan Weinhuber 3486f3eb5384SStefan Weinhuber dedata->ep_format = 0x20; /* records per track is valid */ 3487f3eb5384SStefan Weinhuber dedata->ep_rec_per_track = blk_per_trk; 3488f3eb5384SStefan Weinhuber 3489f3eb5384SStefan Weinhuber if (rec_on_trk) { 3490f3eb5384SStefan Weinhuber switch (basepriv->rdc_data.dev_type) { 3491f3eb5384SStefan Weinhuber case 0x3390: 3492f3eb5384SStefan Weinhuber dn = ceil_quot(blksize + 6, 232); 3493f3eb5384SStefan Weinhuber d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); 3494f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 3495f3eb5384SStefan Weinhuber break; 3496f3eb5384SStefan Weinhuber case 0x3380: 3497f3eb5384SStefan Weinhuber d = 7 + ceil_quot(blksize + 12, 32); 3498f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 3499f3eb5384SStefan Weinhuber break; 3500f3eb5384SStefan Weinhuber } 3501f3eb5384SStefan Weinhuber } 3502f3eb5384SStefan Weinhuber 35038fd57520SJan Höppner if (cmd == DASD_ECKD_CCW_READ_COUNT_MT) { 35048fd57520SJan Höppner lredata->auxiliary.length_valid = 0; 35058fd57520SJan Höppner lredata->auxiliary.length_scope = 0; 35068fd57520SJan Höppner lredata->sector = 0xff; 35078fd57520SJan Höppner } else { 3508f3eb5384SStefan Weinhuber lredata->auxiliary.length_valid = 1; 3509f3eb5384SStefan Weinhuber lredata->auxiliary.length_scope = 1; 35108fd57520SJan Höppner lredata->sector = sector; 35118fd57520SJan Höppner } 3512f3eb5384SStefan Weinhuber lredata->auxiliary.imbedded_ccw_valid = 1; 3513f3eb5384SStefan Weinhuber lredata->length = tlf; 3514f3eb5384SStefan Weinhuber lredata->imbedded_ccw = cmd; 3515f3eb5384SStefan Weinhuber lredata->count = count; 3516f3eb5384SStefan Weinhuber set_ch_t(&lredata->seek_addr, begcyl, beghead); 3517f3eb5384SStefan Weinhuber lredata->search_arg.cyl = lredata->seek_addr.cyl; 3518f3eb5384SStefan Weinhuber lredata->search_arg.head = lredata->seek_addr.head; 3519f3eb5384SStefan Weinhuber lredata->search_arg.record = rec_on_trk; 3520f3eb5384SStefan Weinhuber 3521f3eb5384SStefan Weinhuber dcw = itcw_add_dcw(itcw, pfx_cmd, 0, 3522f3eb5384SStefan Weinhuber &pfxdata, sizeof(pfxdata), total_data_size); 3523757853eaSGustavo A. R. Silva return PTR_ERR_OR_ZERO(dcw); 3524f3eb5384SStefan Weinhuber } 3525f3eb5384SStefan Weinhuber 3526f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 3527f3eb5384SStefan Weinhuber struct dasd_device *startdev, 3528f3eb5384SStefan Weinhuber struct dasd_block *block, 3529f3eb5384SStefan Weinhuber struct request *req, 3530f3eb5384SStefan Weinhuber sector_t first_rec, 3531f3eb5384SStefan Weinhuber sector_t last_rec, 3532f3eb5384SStefan Weinhuber sector_t first_trk, 3533f3eb5384SStefan Weinhuber sector_t last_trk, 3534f3eb5384SStefan Weinhuber unsigned int first_offs, 3535f3eb5384SStefan Weinhuber unsigned int last_offs, 3536f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 3537f3eb5384SStefan Weinhuber unsigned int blksize) 3538f3eb5384SStefan Weinhuber { 3539f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 3540f3eb5384SStefan Weinhuber struct req_iterator iter; 35417988613bSKent Overstreet struct bio_vec bv; 3542f3eb5384SStefan Weinhuber char *dst; 3543f3eb5384SStefan Weinhuber unsigned int trkcount, ctidaw; 3544f3eb5384SStefan Weinhuber unsigned char cmd; 3545f3eb5384SStefan Weinhuber struct dasd_device *basedev; 3546f3eb5384SStefan Weinhuber unsigned int tlf; 3547f3eb5384SStefan Weinhuber struct itcw *itcw; 3548f3eb5384SStefan Weinhuber struct tidaw *last_tidaw = NULL; 3549f3eb5384SStefan Weinhuber int itcw_op; 3550f3eb5384SStefan Weinhuber size_t itcw_size; 3551ef19298bSStefan Weinhuber u8 tidaw_flags; 3552ef19298bSStefan Weinhuber unsigned int seg_len, part_len, len_to_track_end; 3553ef19298bSStefan Weinhuber unsigned char new_track; 3554ef19298bSStefan Weinhuber sector_t recid, trkid; 3555ef19298bSStefan Weinhuber unsigned int offs; 3556ef19298bSStefan Weinhuber unsigned int count, count_to_trk_end; 3557cd10502bSJulia Lawall int ret; 3558f3eb5384SStefan Weinhuber 3559f3eb5384SStefan Weinhuber basedev = block->base; 3560f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) { 3561f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 3562f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_READ; 3563f3eb5384SStefan Weinhuber } else if (rq_data_dir(req) == WRITE) { 3564f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 3565f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_WRITE; 3566f3eb5384SStefan Weinhuber } else 3567f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 3568f3eb5384SStefan Weinhuber 3569f3eb5384SStefan Weinhuber /* trackbased I/O needs address all memory via TIDAWs, 3570f3eb5384SStefan Weinhuber * not just for 64 bit addresses. This allows us to map 3571f3eb5384SStefan Weinhuber * each segment directly to one tidaw. 3572ef19298bSStefan Weinhuber * In the case of write requests, additional tidaws may 3573ef19298bSStefan Weinhuber * be needed when a segment crosses a track boundary. 3574f3eb5384SStefan Weinhuber */ 3575f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 3576f3eb5384SStefan Weinhuber ctidaw = 0; 3577f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 3578f3eb5384SStefan Weinhuber ++ctidaw; 3579f3eb5384SStefan Weinhuber } 3580ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 3581ef19298bSStefan Weinhuber ctidaw += (last_trk - first_trk); 3582f3eb5384SStefan Weinhuber 3583f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 3584f3eb5384SStefan Weinhuber itcw_size = itcw_calc_size(0, ctidaw, 0); 3585c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev, 3586c5205f2fSSebastian Ott blk_mq_rq_to_pdu(req)); 3587f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 3588f3eb5384SStefan Weinhuber return cqr; 3589f3eb5384SStefan Weinhuber 3590f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 3591f3eb5384SStefan Weinhuber if (first_trk == last_trk) 3592f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 3593f3eb5384SStefan Weinhuber else 3594f3eb5384SStefan Weinhuber tlf = last_offs + 1; 3595f3eb5384SStefan Weinhuber tlf *= blksize; 3596f3eb5384SStefan Weinhuber 3597f3eb5384SStefan Weinhuber itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); 3598ef19298bSStefan Weinhuber if (IS_ERR(itcw)) { 3599cd10502bSJulia Lawall ret = -EINVAL; 3600cd10502bSJulia Lawall goto out_error; 3601ef19298bSStefan Weinhuber } 3602f3eb5384SStefan Weinhuber cqr->cpaddr = itcw_get_tcw(itcw); 3603f3eb5384SStefan Weinhuber if (prepare_itcw(itcw, first_trk, last_trk, 3604f3eb5384SStefan Weinhuber cmd, basedev, startdev, 3605f3eb5384SStefan Weinhuber first_offs + 1, 3606f3eb5384SStefan Weinhuber trkcount, blksize, 3607f3eb5384SStefan Weinhuber (last_rec - first_rec + 1) * blksize, 3608f3eb5384SStefan Weinhuber tlf, blk_per_trk) == -EAGAIN) { 3609f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 3610f3eb5384SStefan Weinhuber * Try again later. 3611f3eb5384SStefan Weinhuber */ 3612cd10502bSJulia Lawall ret = -EAGAIN; 3613cd10502bSJulia Lawall goto out_error; 3614f3eb5384SStefan Weinhuber } 3615d54cddb6SHeiko Carstens len_to_track_end = 0; 3616f3eb5384SStefan Weinhuber /* 3617f3eb5384SStefan Weinhuber * A tidaw can address 4k of memory, but must not cross page boundaries 3618f3eb5384SStefan Weinhuber * We can let the block layer handle this by setting 3619f3eb5384SStefan Weinhuber * blk_queue_segment_boundary to page boundaries and 3620f3eb5384SStefan Weinhuber * blk_max_segment_size to page size when setting up the request queue. 3621ef19298bSStefan Weinhuber * For write requests, a TIDAW must not cross track boundaries, because 3622ef19298bSStefan Weinhuber * we have to set the CBC flag on the last tidaw for each track. 3623f3eb5384SStefan Weinhuber */ 3624ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) { 3625ef19298bSStefan Weinhuber new_track = 1; 3626ef19298bSStefan Weinhuber recid = first_rec; 3627f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 36287988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 36297988613bSKent Overstreet seg_len = bv.bv_len; 3630ef19298bSStefan Weinhuber while (seg_len) { 3631ef19298bSStefan Weinhuber if (new_track) { 3632ef19298bSStefan Weinhuber trkid = recid; 3633ef19298bSStefan Weinhuber offs = sector_div(trkid, blk_per_trk); 3634ef19298bSStefan Weinhuber count_to_trk_end = blk_per_trk - offs; 3635ef19298bSStefan Weinhuber count = min((last_rec - recid + 1), 3636ef19298bSStefan Weinhuber (sector_t)count_to_trk_end); 3637ef19298bSStefan Weinhuber len_to_track_end = count * blksize; 3638ef19298bSStefan Weinhuber recid += count; 3639ef19298bSStefan Weinhuber new_track = 0; 3640f3eb5384SStefan Weinhuber } 3641ef19298bSStefan Weinhuber part_len = min(seg_len, len_to_track_end); 3642ef19298bSStefan Weinhuber seg_len -= part_len; 3643ef19298bSStefan Weinhuber len_to_track_end -= part_len; 3644ef19298bSStefan Weinhuber /* We need to end the tidaw at track end */ 3645ef19298bSStefan Weinhuber if (!len_to_track_end) { 3646ef19298bSStefan Weinhuber new_track = 1; 3647ef19298bSStefan Weinhuber tidaw_flags = TIDAW_FLAGS_INSERT_CBC; 3648ef19298bSStefan Weinhuber } else 3649ef19298bSStefan Weinhuber tidaw_flags = 0; 3650ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, 3651ef19298bSStefan Weinhuber dst, part_len); 3652cd10502bSJulia Lawall if (IS_ERR(last_tidaw)) { 3653cd10502bSJulia Lawall ret = -EINVAL; 3654cd10502bSJulia Lawall goto out_error; 3655cd10502bSJulia Lawall } 3656ef19298bSStefan Weinhuber dst += part_len; 3657ef19298bSStefan Weinhuber } 3658ef19298bSStefan Weinhuber } 3659ef19298bSStefan Weinhuber } else { 3660ef19298bSStefan Weinhuber rq_for_each_segment(bv, req, iter) { 36617988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 3662ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, 0x00, 36637988613bSKent Overstreet dst, bv.bv_len); 3664cd10502bSJulia Lawall if (IS_ERR(last_tidaw)) { 3665cd10502bSJulia Lawall ret = -EINVAL; 3666cd10502bSJulia Lawall goto out_error; 3667cd10502bSJulia Lawall } 3668ef19298bSStefan Weinhuber } 3669ef19298bSStefan Weinhuber } 3670ef19298bSStefan Weinhuber last_tidaw->flags |= TIDAW_FLAGS_LAST; 3671ef19298bSStefan Weinhuber last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; 3672f3eb5384SStefan Weinhuber itcw_finalize(itcw); 3673f3eb5384SStefan Weinhuber 3674f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 3675f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 3676f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3677ef19298bSStefan Weinhuber cqr->cpmode = 1; 3678f3eb5384SStefan Weinhuber cqr->startdev = startdev; 3679f3eb5384SStefan Weinhuber cqr->memdev = startdev; 3680f3eb5384SStefan Weinhuber cqr->block = block; 36817c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 3682c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 36831f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 36841aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 3685f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 3686f3eb5384SStefan Weinhuber return cqr; 3687cd10502bSJulia Lawall out_error: 3688cd10502bSJulia Lawall dasd_sfree_request(cqr, startdev); 3689cd10502bSJulia Lawall return ERR_PTR(ret); 3690f3eb5384SStefan Weinhuber } 3691f3eb5384SStefan Weinhuber 3692f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 3693f3eb5384SStefan Weinhuber struct dasd_block *block, 3694f3eb5384SStefan Weinhuber struct request *req) 3695f3eb5384SStefan Weinhuber { 3696ef19298bSStefan Weinhuber int cmdrtd, cmdwtd; 3697f3eb5384SStefan Weinhuber int use_prefix; 3698ef19298bSStefan Weinhuber int fcx_multitrack; 369945b44d76SStefan Weinhuber struct dasd_eckd_private *private; 3700f3eb5384SStefan Weinhuber struct dasd_device *basedev; 3701f3eb5384SStefan Weinhuber sector_t first_rec, last_rec; 3702f3eb5384SStefan Weinhuber sector_t first_trk, last_trk; 3703f3eb5384SStefan Weinhuber unsigned int first_offs, last_offs; 3704f3eb5384SStefan Weinhuber unsigned int blk_per_trk, blksize; 3705f3eb5384SStefan Weinhuber int cdlspecial; 3706ef19298bSStefan Weinhuber unsigned int data_size; 3707f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 3708f3eb5384SStefan Weinhuber 3709f3eb5384SStefan Weinhuber basedev = block->base; 3710543691a4SSebastian Ott private = basedev->private; 3711f3eb5384SStefan Weinhuber 3712f3eb5384SStefan Weinhuber /* Calculate number of blocks/records per track. */ 3713f3eb5384SStefan Weinhuber blksize = block->bp_block; 3714f3eb5384SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 37156fca97a9SStefan Haberland if (blk_per_trk == 0) 37166fca97a9SStefan Haberland return ERR_PTR(-EINVAL); 3717f3eb5384SStefan Weinhuber /* Calculate record id of first and last block. */ 371883096ebfSTejun Heo first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; 3719f3eb5384SStefan Weinhuber first_offs = sector_div(first_trk, blk_per_trk); 3720f3eb5384SStefan Weinhuber last_rec = last_trk = 372183096ebfSTejun Heo (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 3722f3eb5384SStefan Weinhuber last_offs = sector_div(last_trk, blk_per_trk); 3723f3eb5384SStefan Weinhuber cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); 3724f3eb5384SStefan Weinhuber 3725ef19298bSStefan Weinhuber fcx_multitrack = private->features.feature[40] & 0x20; 3726ef19298bSStefan Weinhuber data_size = blk_rq_bytes(req); 372726a35f37SStefan Weinhuber if (data_size % blksize) 372826a35f37SStefan Weinhuber return ERR_PTR(-EINVAL); 3729ef19298bSStefan Weinhuber /* tpm write request add CBC data on each track boundary */ 3730ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 3731ef19298bSStefan Weinhuber data_size += (last_trk - first_trk) * 4; 3732f3eb5384SStefan Weinhuber 3733f3eb5384SStefan Weinhuber /* is read track data and write track data in command mode supported? */ 3734f3eb5384SStefan Weinhuber cmdrtd = private->features.feature[9] & 0x20; 3735f3eb5384SStefan Weinhuber cmdwtd = private->features.feature[12] & 0x40; 3736f3eb5384SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 3737f3eb5384SStefan Weinhuber 3738f3eb5384SStefan Weinhuber cqr = NULL; 3739f3eb5384SStefan Weinhuber if (cdlspecial || dasd_page_cache) { 3740f3eb5384SStefan Weinhuber /* do nothing, just fall through to the cmd mode single case */ 3741ef19298bSStefan Weinhuber } else if ((data_size <= private->fcx_max_data) 3742ef19298bSStefan Weinhuber && (fcx_multitrack || (first_trk == last_trk))) { 3743f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, 3744f3eb5384SStefan Weinhuber first_rec, last_rec, 3745f3eb5384SStefan Weinhuber first_trk, last_trk, 3746f3eb5384SStefan Weinhuber first_offs, last_offs, 3747f3eb5384SStefan Weinhuber blk_per_trk, blksize); 3748ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3749ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 3750f3eb5384SStefan Weinhuber cqr = NULL; 3751f3eb5384SStefan Weinhuber } else if (use_prefix && 3752f3eb5384SStefan Weinhuber (((rq_data_dir(req) == READ) && cmdrtd) || 3753f3eb5384SStefan Weinhuber ((rq_data_dir(req) == WRITE) && cmdwtd))) { 3754f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, 3755f3eb5384SStefan Weinhuber first_rec, last_rec, 3756f3eb5384SStefan Weinhuber first_trk, last_trk, 3757f3eb5384SStefan Weinhuber first_offs, last_offs, 3758f3eb5384SStefan Weinhuber blk_per_trk, blksize); 3759ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 3760ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 3761f3eb5384SStefan Weinhuber cqr = NULL; 3762f3eb5384SStefan Weinhuber } 3763f3eb5384SStefan Weinhuber if (!cqr) 3764f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_single(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); 3769f3eb5384SStefan Weinhuber return cqr; 3770f3eb5384SStefan Weinhuber } 3771f3eb5384SStefan Weinhuber 3772bbc7f7eaSJan Höppner static struct dasd_ccw_req *dasd_eckd_build_cp_raw(struct dasd_device *startdev, 3773e4dbb0f2SStefan Haberland struct dasd_block *block, 3774e4dbb0f2SStefan Haberland struct request *req) 3775e4dbb0f2SStefan Haberland { 37769d2be0c1SJan Höppner sector_t start_padding_sectors, end_sector_offset, end_padding_sectors; 3777e4dbb0f2SStefan Haberland unsigned int seg_len, len_to_track_end; 3778e4dbb0f2SStefan Haberland unsigned int cidaw, cplength, datasize; 3779558b9ef0SStefan Weinhuber sector_t first_trk, last_trk, sectors; 37809d2be0c1SJan Höppner struct dasd_eckd_private *base_priv; 37819d2be0c1SJan Höppner struct dasd_device *basedev; 37829d2be0c1SJan Höppner struct req_iterator iter; 37839d2be0c1SJan Höppner struct dasd_ccw_req *cqr; 37849d2be0c1SJan Höppner unsigned int first_offs; 37859d2be0c1SJan Höppner unsigned int trkcount; 37869d2be0c1SJan Höppner unsigned long *idaws; 37879d2be0c1SJan Höppner unsigned int size; 37889d2be0c1SJan Höppner unsigned char cmd; 37899d2be0c1SJan Höppner struct bio_vec bv; 37909d2be0c1SJan Höppner struct ccw1 *ccw; 37919d2be0c1SJan Höppner int use_prefix; 37929d2be0c1SJan Höppner void *data; 37939d2be0c1SJan Höppner char *dst; 3794e4dbb0f2SStefan Haberland 3795e4dbb0f2SStefan Haberland /* 3796e4dbb0f2SStefan Haberland * raw track access needs to be mutiple of 64k and on 64k boundary 3797558b9ef0SStefan Weinhuber * For read requests we can fix an incorrect alignment by padding 3798558b9ef0SStefan Weinhuber * the request with dummy pages. 3799e4dbb0f2SStefan Haberland */ 3800558b9ef0SStefan Weinhuber start_padding_sectors = blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK; 3801558b9ef0SStefan Weinhuber end_sector_offset = (blk_rq_pos(req) + blk_rq_sectors(req)) % 3802558b9ef0SStefan Weinhuber DASD_RAW_SECTORS_PER_TRACK; 3803558b9ef0SStefan Weinhuber end_padding_sectors = (DASD_RAW_SECTORS_PER_TRACK - end_sector_offset) % 3804558b9ef0SStefan Weinhuber DASD_RAW_SECTORS_PER_TRACK; 3805558b9ef0SStefan Weinhuber basedev = block->base; 3806558b9ef0SStefan Weinhuber if ((start_padding_sectors || end_padding_sectors) && 3807558b9ef0SStefan Weinhuber (rq_data_dir(req) == WRITE)) { 3808558b9ef0SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 3809e78c21d1SMing Lei "raw write not track aligned (%llu,%llu) req %p", 3810558b9ef0SStefan Weinhuber start_padding_sectors, end_padding_sectors, req); 38119d2be0c1SJan Höppner return ERR_PTR(-EINVAL); 3812e4dbb0f2SStefan Haberland } 3813e4dbb0f2SStefan Haberland 3814e4dbb0f2SStefan Haberland first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; 3815e4dbb0f2SStefan Haberland last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / 3816e4dbb0f2SStefan Haberland DASD_RAW_SECTORS_PER_TRACK; 3817e4dbb0f2SStefan Haberland trkcount = last_trk - first_trk + 1; 3818e4dbb0f2SStefan Haberland first_offs = 0; 3819e4dbb0f2SStefan Haberland 3820e4dbb0f2SStefan Haberland if (rq_data_dir(req) == READ) 3821e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_READ_TRACK; 3822e4dbb0f2SStefan Haberland else if (rq_data_dir(req) == WRITE) 3823e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; 38249d2be0c1SJan Höppner else 38259d2be0c1SJan Höppner return ERR_PTR(-EINVAL); 3826e4dbb0f2SStefan Haberland 3827e4dbb0f2SStefan Haberland /* 3828e4dbb0f2SStefan Haberland * Raw track based I/O needs IDAWs for each page, 3829e4dbb0f2SStefan Haberland * and not just for 64 bit addresses. 3830e4dbb0f2SStefan Haberland */ 3831e4dbb0f2SStefan Haberland cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; 3832e4dbb0f2SStefan Haberland 3833e4dbb0f2SStefan Haberland /* 38349d2be0c1SJan Höppner * struct PFX_eckd_data and struct LRE_eckd_data can have up to 2 bytes 38359d2be0c1SJan Höppner * of extended parameter. This is needed for write full track. 3836e4dbb0f2SStefan Haberland */ 38379d2be0c1SJan Höppner base_priv = basedev->private; 38389d2be0c1SJan Höppner use_prefix = base_priv->features.feature[8] & 0x01; 38399d2be0c1SJan Höppner if (use_prefix) { 38409d2be0c1SJan Höppner cplength = 1 + trkcount; 38419d2be0c1SJan Höppner size = sizeof(struct PFX_eckd_data) + 2; 38429d2be0c1SJan Höppner } else { 38439d2be0c1SJan Höppner cplength = 2 + trkcount; 38449d2be0c1SJan Höppner size = sizeof(struct DE_eckd_data) + 38459d2be0c1SJan Höppner sizeof(struct LRE_eckd_data) + 2; 38469d2be0c1SJan Höppner } 38479d2be0c1SJan Höppner size = ALIGN(size, 8); 3848e4dbb0f2SStefan Haberland 38497bf76f01SJan Höppner datasize = size + cidaw * sizeof(unsigned long); 3850e4dbb0f2SStefan Haberland 3851e4dbb0f2SStefan Haberland /* Allocate the ccw request. */ 3852e4dbb0f2SStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 3853c5205f2fSSebastian Ott datasize, startdev, blk_mq_rq_to_pdu(req)); 3854e4dbb0f2SStefan Haberland if (IS_ERR(cqr)) 38559d2be0c1SJan Höppner return cqr; 3856e4dbb0f2SStefan Haberland 38579d2be0c1SJan Höppner ccw = cqr->cpaddr; 38589d2be0c1SJan Höppner data = cqr->data; 38599d2be0c1SJan Höppner 38609d2be0c1SJan Höppner if (use_prefix) { 38619d2be0c1SJan Höppner prefix_LRE(ccw++, data, first_trk, last_trk, cmd, basedev, 38629d2be0c1SJan Höppner startdev, 1, first_offs + 1, trkcount, 0, 0); 38639d2be0c1SJan Höppner } else { 38649d2be0c1SJan Höppner define_extent(ccw++, data, first_trk, last_trk, cmd, basedev, 0); 38659d2be0c1SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 38669d2be0c1SJan Höppner 38679d2be0c1SJan Höppner data += sizeof(struct DE_eckd_data); 38689d2be0c1SJan Höppner locate_record_ext(ccw++, data, first_trk, first_offs + 1, 38699d2be0c1SJan Höppner trkcount, cmd, basedev, 0, 0); 3870e4dbb0f2SStefan Haberland } 3871e4dbb0f2SStefan Haberland 38729d2be0c1SJan Höppner idaws = (unsigned long *)(cqr->data + size); 3873e4dbb0f2SStefan Haberland len_to_track_end = 0; 3874558b9ef0SStefan Weinhuber if (start_padding_sectors) { 3875558b9ef0SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 3876558b9ef0SStefan Weinhuber ccw->cmd_code = cmd; 3877558b9ef0SStefan Weinhuber /* maximum 3390 track size */ 3878558b9ef0SStefan Weinhuber ccw->count = 57326; 3879558b9ef0SStefan Weinhuber /* 64k map to one track */ 3880558b9ef0SStefan Weinhuber len_to_track_end = 65536 - start_padding_sectors * 512; 3881558b9ef0SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 3882558b9ef0SStefan Weinhuber ccw->flags |= CCW_FLAG_IDA; 3883558b9ef0SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 3884558b9ef0SStefan Weinhuber ccw++; 3885558b9ef0SStefan Weinhuber for (sectors = 0; sectors < start_padding_sectors; sectors += 8) 3886558b9ef0SStefan Weinhuber idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 3887558b9ef0SStefan Weinhuber } 3888e4dbb0f2SStefan Haberland rq_for_each_segment(bv, req, iter) { 38897988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 38907988613bSKent Overstreet seg_len = bv.bv_len; 3891558b9ef0SStefan Weinhuber if (cmd == DASD_ECKD_CCW_READ_TRACK) 3892558b9ef0SStefan Weinhuber memset(dst, 0, seg_len); 3893e4dbb0f2SStefan Haberland if (!len_to_track_end) { 3894e4dbb0f2SStefan Haberland ccw[-1].flags |= CCW_FLAG_CC; 3895e4dbb0f2SStefan Haberland ccw->cmd_code = cmd; 3896e4dbb0f2SStefan Haberland /* maximum 3390 track size */ 3897e4dbb0f2SStefan Haberland ccw->count = 57326; 3898e4dbb0f2SStefan Haberland /* 64k map to one track */ 3899e4dbb0f2SStefan Haberland len_to_track_end = 65536; 3900e4dbb0f2SStefan Haberland ccw->cda = (__u32)(addr_t)idaws; 3901e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_IDA; 3902e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 3903e4dbb0f2SStefan Haberland ccw++; 3904e4dbb0f2SStefan Haberland } 3905e4dbb0f2SStefan Haberland len_to_track_end -= seg_len; 3906e4dbb0f2SStefan Haberland idaws = idal_create_words(idaws, dst, seg_len); 3907e4dbb0f2SStefan Haberland } 3908558b9ef0SStefan Weinhuber for (sectors = 0; sectors < end_padding_sectors; sectors += 8) 3909558b9ef0SStefan Weinhuber idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 3910e4dbb0f2SStefan Haberland if (blk_noretry_request(req) || 3911e4dbb0f2SStefan Haberland block->base->features & DASD_FEATURE_FAILFAST) 3912e4dbb0f2SStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3913e4dbb0f2SStefan Haberland cqr->startdev = startdev; 3914e4dbb0f2SStefan Haberland cqr->memdev = startdev; 3915e4dbb0f2SStefan Haberland cqr->block = block; 3916e4dbb0f2SStefan Haberland cqr->expires = startdev->default_expires * HZ; 3917c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 39181f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 39191aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 3920e4dbb0f2SStefan Haberland cqr->status = DASD_CQR_FILLED; 3921e4dbb0f2SStefan Haberland 3922e4dbb0f2SStefan Haberland return cqr; 3923e4dbb0f2SStefan Haberland } 3924e4dbb0f2SStefan Haberland 3925e4dbb0f2SStefan Haberland 39261da177e4SLinus Torvalds static int 39271da177e4SLinus Torvalds dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 39281da177e4SLinus Torvalds { 39291da177e4SLinus Torvalds struct dasd_eckd_private *private; 39301da177e4SLinus Torvalds struct ccw1 *ccw; 39315705f702SNeilBrown struct req_iterator iter; 39327988613bSKent Overstreet struct bio_vec bv; 39331da177e4SLinus Torvalds char *dst, *cda; 39341da177e4SLinus Torvalds unsigned int blksize, blk_per_trk, off; 39351da177e4SLinus Torvalds sector_t recid; 39365705f702SNeilBrown int status; 39371da177e4SLinus Torvalds 39381da177e4SLinus Torvalds if (!dasd_page_cache) 39391da177e4SLinus Torvalds goto out; 3940543691a4SSebastian Ott private = cqr->block->base->private; 39418e09f215SStefan Weinhuber blksize = cqr->block->bp_block; 39421da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 394383096ebfSTejun Heo recid = blk_rq_pos(req) >> cqr->block->s2b_shift; 39441da177e4SLinus Torvalds ccw = cqr->cpaddr; 39451da177e4SLinus Torvalds /* Skip over define extent & locate record. */ 39461da177e4SLinus Torvalds ccw++; 39471da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 39481da177e4SLinus Torvalds ccw++; 39495705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 39507988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 39517988613bSKent Overstreet for (off = 0; off < bv.bv_len; off += blksize) { 39521da177e4SLinus Torvalds /* Skip locate record. */ 39531da177e4SLinus Torvalds if (private->uses_cdl && recid <= 2*blk_per_trk) 39541da177e4SLinus Torvalds ccw++; 39551da177e4SLinus Torvalds if (dst) { 39561da177e4SLinus Torvalds if (ccw->flags & CCW_FLAG_IDA) 39571da177e4SLinus Torvalds cda = *((char **)((addr_t) ccw->cda)); 39581da177e4SLinus Torvalds else 39591da177e4SLinus Torvalds cda = (char *)((addr_t) ccw->cda); 39601da177e4SLinus Torvalds if (dst != cda) { 39611da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 39627988613bSKent Overstreet memcpy(dst, cda, bv.bv_len); 39631da177e4SLinus Torvalds kmem_cache_free(dasd_page_cache, 39641da177e4SLinus Torvalds (void *)((addr_t)cda & PAGE_MASK)); 39651da177e4SLinus Torvalds } 39661da177e4SLinus Torvalds dst = NULL; 39671da177e4SLinus Torvalds } 39681da177e4SLinus Torvalds ccw++; 39691da177e4SLinus Torvalds recid++; 39701da177e4SLinus Torvalds } 39711da177e4SLinus Torvalds } 39721da177e4SLinus Torvalds out: 39731da177e4SLinus Torvalds status = cqr->status == DASD_CQR_DONE; 39748e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 39751da177e4SLinus Torvalds return status; 39761da177e4SLinus Torvalds } 39771da177e4SLinus Torvalds 39788e09f215SStefan Weinhuber /* 3979f3eb5384SStefan Weinhuber * Modify ccw/tcw in cqr so it can be started on a base device. 39808e09f215SStefan Weinhuber * 39818e09f215SStefan Weinhuber * Note that this is not enough to restart the cqr! 39828e09f215SStefan Weinhuber * Either reset cqr->startdev as well (summary unit check handling) 39838e09f215SStefan Weinhuber * or restart via separate cqr (as in ERP handling). 39848e09f215SStefan Weinhuber */ 39858e09f215SStefan Weinhuber void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 39868e09f215SStefan Weinhuber { 39878e09f215SStefan Weinhuber struct ccw1 *ccw; 39888e09f215SStefan Weinhuber struct PFX_eckd_data *pfxdata; 3989f3eb5384SStefan Weinhuber struct tcw *tcw; 3990f3eb5384SStefan Weinhuber struct tccb *tccb; 3991f3eb5384SStefan Weinhuber struct dcw *dcw; 39928e09f215SStefan Weinhuber 3993f3eb5384SStefan Weinhuber if (cqr->cpmode == 1) { 3994f3eb5384SStefan Weinhuber tcw = cqr->cpaddr; 3995f3eb5384SStefan Weinhuber tccb = tcw_get_tccb(tcw); 3996f3eb5384SStefan Weinhuber dcw = (struct dcw *)&tccb->tca[0]; 3997f3eb5384SStefan Weinhuber pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; 3998f3eb5384SStefan Weinhuber pfxdata->validity.verify_base = 0; 3999f3eb5384SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 4000f3eb5384SStefan Weinhuber } else { 40018e09f215SStefan Weinhuber ccw = cqr->cpaddr; 40028e09f215SStefan Weinhuber pfxdata = cqr->data; 40038e09f215SStefan Weinhuber if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 40048e09f215SStefan Weinhuber pfxdata->validity.verify_base = 0; 40058e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 40068e09f215SStefan Weinhuber } 40078e09f215SStefan Weinhuber } 4008f3eb5384SStefan Weinhuber } 40098e09f215SStefan Weinhuber 40108e09f215SStefan Weinhuber #define DASD_ECKD_CHANQ_MAX_SIZE 4 40118e09f215SStefan Weinhuber 40128e09f215SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 40138e09f215SStefan Weinhuber struct dasd_block *block, 40148e09f215SStefan Weinhuber struct request *req) 40158e09f215SStefan Weinhuber { 40168e09f215SStefan Weinhuber struct dasd_eckd_private *private; 40178e09f215SStefan Weinhuber struct dasd_device *startdev; 40188e09f215SStefan Weinhuber unsigned long flags; 40198e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 40208e09f215SStefan Weinhuber 40218e09f215SStefan Weinhuber startdev = dasd_alias_get_start_dev(base); 40228e09f215SStefan Weinhuber if (!startdev) 40238e09f215SStefan Weinhuber startdev = base; 4024543691a4SSebastian Ott private = startdev->private; 40258e09f215SStefan Weinhuber if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 40268e09f215SStefan Weinhuber return ERR_PTR(-EBUSY); 40278e09f215SStefan Weinhuber 40288e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 40298e09f215SStefan Weinhuber private->count++; 4030e4dbb0f2SStefan Haberland if ((base->features & DASD_FEATURE_USERAW)) 4031bbc7f7eaSJan Höppner cqr = dasd_eckd_build_cp_raw(startdev, block, req); 4032e4dbb0f2SStefan Haberland else 40338e09f215SStefan Weinhuber cqr = dasd_eckd_build_cp(startdev, block, req); 40348e09f215SStefan Weinhuber if (IS_ERR(cqr)) 40358e09f215SStefan Weinhuber private->count--; 40368e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 40378e09f215SStefan Weinhuber return cqr; 40388e09f215SStefan Weinhuber } 40398e09f215SStefan Weinhuber 40408e09f215SStefan Weinhuber static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 40418e09f215SStefan Weinhuber struct request *req) 40428e09f215SStefan Weinhuber { 40438e09f215SStefan Weinhuber struct dasd_eckd_private *private; 40448e09f215SStefan Weinhuber unsigned long flags; 40458e09f215SStefan Weinhuber 40468e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 4047543691a4SSebastian Ott private = cqr->memdev->private; 40488e09f215SStefan Weinhuber private->count--; 40498e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 40508e09f215SStefan Weinhuber return dasd_eckd_free_cp(cqr, req); 40518e09f215SStefan Weinhuber } 40528e09f215SStefan Weinhuber 40531da177e4SLinus Torvalds static int 40541da177e4SLinus Torvalds dasd_eckd_fill_info(struct dasd_device * device, 40551da177e4SLinus Torvalds struct dasd_information2_t * info) 40561da177e4SLinus Torvalds { 4057543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 40581da177e4SLinus Torvalds 40591da177e4SLinus Torvalds info->label_block = 2; 40601da177e4SLinus Torvalds info->FBA_layout = private->uses_cdl ? 0 : 1; 40611da177e4SLinus Torvalds info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 4062543691a4SSebastian Ott info->characteristics_size = sizeof(private->rdc_data); 40631da177e4SLinus Torvalds memcpy(info->characteristics, &private->rdc_data, 4064543691a4SSebastian Ott sizeof(private->rdc_data)); 40654abb08c2SStefan Weinhuber info->confdata_size = min((unsigned long)private->conf_len, 40664abb08c2SStefan Weinhuber sizeof(info->configuration_data)); 40674abb08c2SStefan Weinhuber memcpy(info->configuration_data, private->conf_data, 40684abb08c2SStefan Weinhuber info->confdata_size); 40691da177e4SLinus Torvalds return 0; 40701da177e4SLinus Torvalds } 40711da177e4SLinus Torvalds 40721da177e4SLinus Torvalds /* 40731da177e4SLinus Torvalds * SECTION: ioctl functions for eckd devices. 40741da177e4SLinus Torvalds */ 40751da177e4SLinus Torvalds 40761da177e4SLinus Torvalds /* 40771da177e4SLinus Torvalds * Release device ioctl. 40781da177e4SLinus Torvalds * Buils a channel programm to releases a prior reserved 40791da177e4SLinus Torvalds * (see dasd_eckd_reserve) device. 40801da177e4SLinus Torvalds */ 40811da177e4SLinus Torvalds static int 40821107ccfbSChristoph Hellwig dasd_eckd_release(struct dasd_device *device) 40831da177e4SLinus Torvalds { 40841da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 40851da177e4SLinus Torvalds int rc; 4086f3eb5384SStefan Weinhuber struct ccw1 *ccw; 4087f932bceaSStefan Weinhuber int useglobal; 40881da177e4SLinus Torvalds 40891da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 40901da177e4SLinus Torvalds return -EACCES; 40911da177e4SLinus Torvalds 4092f932bceaSStefan Weinhuber useglobal = 0; 4093c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); 40941da177e4SLinus Torvalds if (IS_ERR(cqr)) { 4095f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 4096f932bceaSStefan Weinhuber useglobal = 1; 4097f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 4098f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 4099f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 4100f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 4101f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 4102f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 4103f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 41041da177e4SLinus Torvalds } 4105f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 4106f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RELEASE; 4107f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4108f3eb5384SStefan Weinhuber ccw->count = 32; 4109f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 41108e09f215SStefan Weinhuber cqr->startdev = device; 41118e09f215SStefan Weinhuber cqr->memdev = device; 41121da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 41131c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4114336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 41151da177e4SLinus Torvalds cqr->expires = 2 * HZ; 41161aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 41171da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 41181da177e4SLinus Torvalds 41191da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 41205a27e60dSStefan Weinhuber if (!rc) 41215a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 41221da177e4SLinus Torvalds 4123f932bceaSStefan Weinhuber if (useglobal) 4124f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 4125f932bceaSStefan Weinhuber else 41268e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 41271da177e4SLinus Torvalds return rc; 41281da177e4SLinus Torvalds } 41291da177e4SLinus Torvalds 41301da177e4SLinus Torvalds /* 41311da177e4SLinus Torvalds * Reserve device ioctl. 41321da177e4SLinus Torvalds * Options are set to 'synchronous wait for interrupt' and 41331da177e4SLinus Torvalds * 'timeout the request'. This leads to a terminate IO if 41341da177e4SLinus Torvalds * the interrupt is outstanding for a certain time. 41351da177e4SLinus Torvalds */ 41361da177e4SLinus Torvalds static int 41371107ccfbSChristoph Hellwig dasd_eckd_reserve(struct dasd_device *device) 41381da177e4SLinus Torvalds { 41391da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 41401da177e4SLinus Torvalds int rc; 4141f3eb5384SStefan Weinhuber struct ccw1 *ccw; 4142f932bceaSStefan Weinhuber int useglobal; 41431da177e4SLinus Torvalds 41441da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 41451da177e4SLinus Torvalds return -EACCES; 41461da177e4SLinus Torvalds 4147f932bceaSStefan Weinhuber useglobal = 0; 4148c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); 41491da177e4SLinus Torvalds if (IS_ERR(cqr)) { 4150f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 4151f932bceaSStefan Weinhuber useglobal = 1; 4152f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 4153f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 4154f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 4155f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 4156f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 4157f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 4158f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 41591da177e4SLinus Torvalds } 4160f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 4161f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RESERVE; 4162f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4163f3eb5384SStefan Weinhuber ccw->count = 32; 4164f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 41658e09f215SStefan Weinhuber cqr->startdev = device; 41668e09f215SStefan Weinhuber cqr->memdev = device; 41671da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 41681c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4169336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 41701da177e4SLinus Torvalds cqr->expires = 2 * HZ; 41711aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 41721da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 41731da177e4SLinus Torvalds 41741da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 41755a27e60dSStefan Weinhuber if (!rc) 41765a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 41771da177e4SLinus Torvalds 4178f932bceaSStefan Weinhuber if (useglobal) 4179f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 4180f932bceaSStefan Weinhuber else 41818e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 41821da177e4SLinus Torvalds return rc; 41831da177e4SLinus Torvalds } 41841da177e4SLinus Torvalds 41851da177e4SLinus Torvalds /* 41861da177e4SLinus Torvalds * Steal lock ioctl - unconditional reserve device. 41871da177e4SLinus Torvalds * Buils a channel programm to break a device's reservation. 41881da177e4SLinus Torvalds * (unconditional reserve) 41891da177e4SLinus Torvalds */ 41901da177e4SLinus Torvalds static int 41911107ccfbSChristoph Hellwig dasd_eckd_steal_lock(struct dasd_device *device) 41921da177e4SLinus Torvalds { 41931da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 41941da177e4SLinus Torvalds int rc; 4195f3eb5384SStefan Weinhuber struct ccw1 *ccw; 4196f932bceaSStefan Weinhuber int useglobal; 41971da177e4SLinus Torvalds 41981da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 41991da177e4SLinus Torvalds return -EACCES; 42001da177e4SLinus Torvalds 4201f932bceaSStefan Weinhuber useglobal = 0; 4202c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); 42031da177e4SLinus Torvalds if (IS_ERR(cqr)) { 4204f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 4205f932bceaSStefan Weinhuber useglobal = 1; 4206f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 4207f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 4208f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 4209f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 4210f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 4211f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 4212f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 42131da177e4SLinus Torvalds } 4214f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 4215f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SLCK; 4216f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4217f3eb5384SStefan Weinhuber ccw->count = 32; 4218f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 42198e09f215SStefan Weinhuber cqr->startdev = device; 42208e09f215SStefan Weinhuber cqr->memdev = device; 42211da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 42221c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4223336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 42241da177e4SLinus Torvalds cqr->expires = 2 * HZ; 42251aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 42261da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 42271da177e4SLinus Torvalds 42281da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 42295a27e60dSStefan Weinhuber if (!rc) 42305a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 42311da177e4SLinus Torvalds 4232f932bceaSStefan Weinhuber if (useglobal) 4233f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 4234f932bceaSStefan Weinhuber else 42358e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 42361da177e4SLinus Torvalds return rc; 42371da177e4SLinus Torvalds } 42381da177e4SLinus Torvalds 42391da177e4SLinus Torvalds /* 4240196339f1SStefan Weinhuber * SNID - Sense Path Group ID 4241196339f1SStefan Weinhuber * This ioctl may be used in situations where I/O is stalled due to 4242196339f1SStefan Weinhuber * a reserve, so if the normal dasd_smalloc_request fails, we use the 4243196339f1SStefan Weinhuber * preallocated dasd_reserve_req. 4244196339f1SStefan Weinhuber */ 4245196339f1SStefan Weinhuber static int dasd_eckd_snid(struct dasd_device *device, 4246196339f1SStefan Weinhuber void __user *argp) 4247196339f1SStefan Weinhuber { 4248196339f1SStefan Weinhuber struct dasd_ccw_req *cqr; 4249196339f1SStefan Weinhuber int rc; 4250196339f1SStefan Weinhuber struct ccw1 *ccw; 4251196339f1SStefan Weinhuber int useglobal; 4252196339f1SStefan Weinhuber struct dasd_snid_ioctl_data usrparm; 4253196339f1SStefan Weinhuber 4254196339f1SStefan Weinhuber if (!capable(CAP_SYS_ADMIN)) 4255196339f1SStefan Weinhuber return -EACCES; 4256196339f1SStefan Weinhuber 4257196339f1SStefan Weinhuber if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 4258196339f1SStefan Weinhuber return -EFAULT; 4259196339f1SStefan Weinhuber 4260196339f1SStefan Weinhuber useglobal = 0; 4261196339f1SStefan Weinhuber cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 4262c5205f2fSSebastian Ott sizeof(struct dasd_snid_data), device, 4263c5205f2fSSebastian Ott NULL); 4264196339f1SStefan Weinhuber if (IS_ERR(cqr)) { 4265196339f1SStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 4266196339f1SStefan Weinhuber useglobal = 1; 4267196339f1SStefan Weinhuber cqr = &dasd_reserve_req->cqr; 4268196339f1SStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 4269196339f1SStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 4270196339f1SStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 4271196339f1SStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 4272196339f1SStefan Weinhuber cqr->data = &dasd_reserve_req->data; 4273196339f1SStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 4274196339f1SStefan Weinhuber } 4275196339f1SStefan Weinhuber ccw = cqr->cpaddr; 4276196339f1SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SNID; 4277196339f1SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4278196339f1SStefan Weinhuber ccw->count = 12; 4279196339f1SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 4280196339f1SStefan Weinhuber cqr->startdev = device; 4281196339f1SStefan Weinhuber cqr->memdev = device; 4282196339f1SStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 4283196339f1SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 42845a27e60dSStefan Weinhuber set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 4285196339f1SStefan Weinhuber cqr->retries = 5; 4286196339f1SStefan Weinhuber cqr->expires = 10 * HZ; 42871aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 4288196339f1SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 4289196339f1SStefan Weinhuber cqr->lpm = usrparm.path_mask; 4290196339f1SStefan Weinhuber 4291196339f1SStefan Weinhuber rc = dasd_sleep_on_immediatly(cqr); 4292196339f1SStefan Weinhuber /* verify that I/O processing didn't modify the path mask */ 4293196339f1SStefan Weinhuber if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) 4294196339f1SStefan Weinhuber rc = -EIO; 4295196339f1SStefan Weinhuber if (!rc) { 4296196339f1SStefan Weinhuber usrparm.data = *((struct dasd_snid_data *)cqr->data); 4297196339f1SStefan Weinhuber if (copy_to_user(argp, &usrparm, sizeof(usrparm))) 4298196339f1SStefan Weinhuber rc = -EFAULT; 4299196339f1SStefan Weinhuber } 4300196339f1SStefan Weinhuber 4301196339f1SStefan Weinhuber if (useglobal) 4302196339f1SStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 4303196339f1SStefan Weinhuber else 4304196339f1SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 4305196339f1SStefan Weinhuber return rc; 4306196339f1SStefan Weinhuber } 4307196339f1SStefan Weinhuber 4308196339f1SStefan Weinhuber /* 43091da177e4SLinus Torvalds * Read performance statistics 43101da177e4SLinus Torvalds */ 43111da177e4SLinus Torvalds static int 43121107ccfbSChristoph Hellwig dasd_eckd_performance(struct dasd_device *device, void __user *argp) 43131da177e4SLinus Torvalds { 43141da177e4SLinus Torvalds struct dasd_psf_prssd_data *prssdp; 43151da177e4SLinus Torvalds struct dasd_rssd_perf_stats_t *stats; 43161da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 43171da177e4SLinus Torvalds struct ccw1 *ccw; 43181da177e4SLinus Torvalds int rc; 43191da177e4SLinus Torvalds 432068b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 43211da177e4SLinus Torvalds (sizeof(struct dasd_psf_prssd_data) + 43221da177e4SLinus Torvalds sizeof(struct dasd_rssd_perf_stats_t)), 4323c5205f2fSSebastian Ott device, NULL); 43241da177e4SLinus Torvalds if (IS_ERR(cqr)) { 4325fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 43261da177e4SLinus Torvalds "Could not allocate initialization request"); 43271da177e4SLinus Torvalds return PTR_ERR(cqr); 43281da177e4SLinus Torvalds } 43298e09f215SStefan Weinhuber cqr->startdev = device; 43308e09f215SStefan Weinhuber cqr->memdev = device; 43311da177e4SLinus Torvalds cqr->retries = 0; 4332eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 43331da177e4SLinus Torvalds cqr->expires = 10 * HZ; 43341da177e4SLinus Torvalds 43351da177e4SLinus Torvalds /* Prepare for Read Subsystem Data */ 43361da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 43371da177e4SLinus Torvalds memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 43381da177e4SLinus Torvalds prssdp->order = PSF_ORDER_PRSSD; 43395d67d164SJoe Perches prssdp->suborder = 0x01; /* Performance Statistics */ 43401da177e4SLinus Torvalds prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 43411da177e4SLinus Torvalds 43421da177e4SLinus Torvalds ccw = cqr->cpaddr; 43431da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_PSF; 43441da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_psf_prssd_data); 43451da177e4SLinus Torvalds ccw->flags |= CCW_FLAG_CC; 43461da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) prssdp; 43471da177e4SLinus Torvalds 43481da177e4SLinus Torvalds /* Read Subsystem Data - Performance Statistics */ 43491da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 43501da177e4SLinus Torvalds memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 43511da177e4SLinus Torvalds 43521da177e4SLinus Torvalds ccw++; 43531da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_RSSD; 43541da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 43551da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) stats; 43561da177e4SLinus Torvalds 43571aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 43581da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 43591da177e4SLinus Torvalds rc = dasd_sleep_on(cqr); 43601da177e4SLinus Torvalds if (rc == 0) { 43611da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 43621da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 43631107ccfbSChristoph Hellwig if (copy_to_user(argp, stats, 43641107ccfbSChristoph Hellwig sizeof(struct dasd_rssd_perf_stats_t))) 43651107ccfbSChristoph Hellwig rc = -EFAULT; 43661da177e4SLinus Torvalds } 43678e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 43681da177e4SLinus Torvalds return rc; 43691da177e4SLinus Torvalds } 43701da177e4SLinus Torvalds 43711da177e4SLinus Torvalds /* 43721da177e4SLinus Torvalds * Get attributes (cache operations) 43731da177e4SLinus Torvalds * Returnes the cache attributes used in Define Extend (DE). 43741da177e4SLinus Torvalds */ 43751da177e4SLinus Torvalds static int 43761107ccfbSChristoph Hellwig dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 43771da177e4SLinus Torvalds { 4378543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 43791107ccfbSChristoph Hellwig struct attrib_data_t attrib = private->attrib; 43801da177e4SLinus Torvalds int rc; 43811da177e4SLinus Torvalds 43821da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 43831da177e4SLinus Torvalds return -EACCES; 43841107ccfbSChristoph Hellwig if (!argp) 43851da177e4SLinus Torvalds return -EINVAL; 43861da177e4SLinus Torvalds 43871107ccfbSChristoph Hellwig rc = 0; 43881107ccfbSChristoph Hellwig if (copy_to_user(argp, (long *) &attrib, 43891107ccfbSChristoph Hellwig sizeof(struct attrib_data_t))) 43901107ccfbSChristoph Hellwig rc = -EFAULT; 43911da177e4SLinus Torvalds 43921da177e4SLinus Torvalds return rc; 43931da177e4SLinus Torvalds } 43941da177e4SLinus Torvalds 43951da177e4SLinus Torvalds /* 43961da177e4SLinus Torvalds * Set attributes (cache operations) 43971da177e4SLinus Torvalds * Stores the attributes for cache operation to be used in Define Extend (DE). 43981da177e4SLinus Torvalds */ 43991da177e4SLinus Torvalds static int 44001107ccfbSChristoph Hellwig dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 44011da177e4SLinus Torvalds { 4402543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 44031da177e4SLinus Torvalds struct attrib_data_t attrib; 44041da177e4SLinus Torvalds 44051da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 44061da177e4SLinus Torvalds return -EACCES; 44071107ccfbSChristoph Hellwig if (!argp) 44081da177e4SLinus Torvalds return -EINVAL; 44091da177e4SLinus Torvalds 44101107ccfbSChristoph Hellwig if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 44111da177e4SLinus Torvalds return -EFAULT; 44121da177e4SLinus Torvalds private->attrib = attrib; 44131da177e4SLinus Torvalds 4414fc19f381SStefan Haberland dev_info(&device->cdev->dev, 4415fc19f381SStefan Haberland "The DASD cache mode was set to %x (%i cylinder prestage)\n", 44161da177e4SLinus Torvalds private->attrib.operation, private->attrib.nr_cyl); 44171da177e4SLinus Torvalds return 0; 44181da177e4SLinus Torvalds } 44191da177e4SLinus Torvalds 4420ab1d848fSNigel Hislop /* 4421ab1d848fSNigel Hislop * Issue syscall I/O to EMC Symmetrix array. 4422ab1d848fSNigel Hislop * CCWs are PSF and RSSD 4423ab1d848fSNigel Hislop */ 4424ab1d848fSNigel Hislop static int dasd_symm_io(struct dasd_device *device, void __user *argp) 4425ab1d848fSNigel Hislop { 4426ab1d848fSNigel Hislop struct dasd_symmio_parms usrparm; 4427ab1d848fSNigel Hislop char *psf_data, *rssd_result; 4428ab1d848fSNigel Hislop struct dasd_ccw_req *cqr; 4429ab1d848fSNigel Hislop struct ccw1 *ccw; 443052898025SNigel Hislop char psf0, psf1; 4431ab1d848fSNigel Hislop int rc; 4432ab1d848fSNigel Hislop 443352898025SNigel Hislop if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) 443452898025SNigel Hislop return -EACCES; 443552898025SNigel Hislop psf0 = psf1 = 0; 443652898025SNigel Hislop 4437ab1d848fSNigel Hislop /* Copy parms from caller */ 4438ab1d848fSNigel Hislop rc = -EFAULT; 4439ab1d848fSNigel Hislop if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 4440ab1d848fSNigel Hislop goto out; 444192d62891SHeiko Carstens if (is_compat_task()) { 4442ab1d848fSNigel Hislop /* Make sure pointers are sane even on 31 bit. */ 4443ab1d848fSNigel Hislop rc = -EINVAL; 4444f8b06859SHeiko Carstens if ((usrparm.psf_data >> 32) != 0) 4445ab1d848fSNigel Hislop goto out; 4446f8b06859SHeiko Carstens if ((usrparm.rssd_result >> 32) != 0) 4447f8b06859SHeiko Carstens goto out; 4448f8b06859SHeiko Carstens usrparm.psf_data &= 0x7fffffffULL; 4449f8b06859SHeiko Carstens usrparm.rssd_result &= 0x7fffffffULL; 4450ab1d848fSNigel Hislop } 44514a8ef699SStefan Haberland /* at least 2 bytes are accessed and should be allocated */ 44524a8ef699SStefan Haberland if (usrparm.psf_data_len < 2) { 44534a8ef699SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, 44544a8ef699SStefan Haberland "Symmetrix ioctl invalid data length %d", 44554a8ef699SStefan Haberland usrparm.psf_data_len); 44564a8ef699SStefan Haberland rc = -EINVAL; 44574a8ef699SStefan Haberland goto out; 44584a8ef699SStefan Haberland } 4459ab1d848fSNigel Hislop /* alloc I/O data area */ 4460ab1d848fSNigel Hislop psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 4461ab1d848fSNigel Hislop rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 4462ab1d848fSNigel Hislop if (!psf_data || !rssd_result) { 4463ab1d848fSNigel Hislop rc = -ENOMEM; 4464ab1d848fSNigel Hislop goto out_free; 4465ab1d848fSNigel Hislop } 4466ab1d848fSNigel Hislop 4467ab1d848fSNigel Hislop /* get syscall header from user space */ 4468ab1d848fSNigel Hislop rc = -EFAULT; 4469ab1d848fSNigel Hislop if (copy_from_user(psf_data, 4470ab1d848fSNigel Hislop (void __user *)(unsigned long) usrparm.psf_data, 4471ab1d848fSNigel Hislop usrparm.psf_data_len)) 4472ab1d848fSNigel Hislop goto out_free; 447352898025SNigel Hislop psf0 = psf_data[0]; 447452898025SNigel Hislop psf1 = psf_data[1]; 4475ab1d848fSNigel Hislop 4476ab1d848fSNigel Hislop /* setup CCWs for PSF + RSSD */ 4477c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2, 0, device, NULL); 4478ab1d848fSNigel Hislop if (IS_ERR(cqr)) { 4479fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 4480ab1d848fSNigel Hislop "Could not allocate initialization request"); 4481ab1d848fSNigel Hislop rc = PTR_ERR(cqr); 4482ab1d848fSNigel Hislop goto out_free; 4483ab1d848fSNigel Hislop } 4484ab1d848fSNigel Hislop 4485ab1d848fSNigel Hislop cqr->startdev = device; 4486ab1d848fSNigel Hislop cqr->memdev = device; 4487ab1d848fSNigel Hislop cqr->retries = 3; 4488ab1d848fSNigel Hislop cqr->expires = 10 * HZ; 44891aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 4490ab1d848fSNigel Hislop cqr->status = DASD_CQR_FILLED; 4491ab1d848fSNigel Hislop 4492ab1d848fSNigel Hislop /* Build the ccws */ 4493ab1d848fSNigel Hislop ccw = cqr->cpaddr; 4494ab1d848fSNigel Hislop 4495ab1d848fSNigel Hislop /* PSF ccw */ 4496ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_PSF; 4497ab1d848fSNigel Hislop ccw->count = usrparm.psf_data_len; 4498ab1d848fSNigel Hislop ccw->flags |= CCW_FLAG_CC; 4499ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) psf_data; 4500ab1d848fSNigel Hislop 4501ab1d848fSNigel Hislop ccw++; 4502ab1d848fSNigel Hislop 4503ab1d848fSNigel Hislop /* RSSD ccw */ 4504ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_RSSD; 4505ab1d848fSNigel Hislop ccw->count = usrparm.rssd_result_len; 4506ab1d848fSNigel Hislop ccw->flags = CCW_FLAG_SLI ; 4507ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) rssd_result; 4508ab1d848fSNigel Hislop 4509ab1d848fSNigel Hislop rc = dasd_sleep_on(cqr); 4510ab1d848fSNigel Hislop if (rc) 4511ab1d848fSNigel Hislop goto out_sfree; 4512ab1d848fSNigel Hislop 4513ab1d848fSNigel Hislop rc = -EFAULT; 4514ab1d848fSNigel Hislop if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 4515ab1d848fSNigel Hislop rssd_result, usrparm.rssd_result_len)) 4516ab1d848fSNigel Hislop goto out_sfree; 4517ab1d848fSNigel Hislop rc = 0; 4518ab1d848fSNigel Hislop 4519ab1d848fSNigel Hislop out_sfree: 4520ab1d848fSNigel Hislop dasd_sfree_request(cqr, cqr->memdev); 4521ab1d848fSNigel Hislop out_free: 4522ab1d848fSNigel Hislop kfree(rssd_result); 4523ab1d848fSNigel Hislop kfree(psf_data); 4524ab1d848fSNigel Hislop out: 452552898025SNigel Hislop DBF_DEV_EVENT(DBF_WARNING, device, 452652898025SNigel Hislop "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", 452752898025SNigel Hislop (int) psf0, (int) psf1, rc); 4528ab1d848fSNigel Hislop return rc; 4529ab1d848fSNigel Hislop } 4530ab1d848fSNigel Hislop 45311107ccfbSChristoph Hellwig static int 45328e09f215SStefan Weinhuber dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 45331107ccfbSChristoph Hellwig { 45348e09f215SStefan Weinhuber struct dasd_device *device = block->base; 45358e09f215SStefan Weinhuber 45361107ccfbSChristoph Hellwig switch (cmd) { 45371107ccfbSChristoph Hellwig case BIODASDGATTR: 45381107ccfbSChristoph Hellwig return dasd_eckd_get_attrib(device, argp); 45391107ccfbSChristoph Hellwig case BIODASDSATTR: 45401107ccfbSChristoph Hellwig return dasd_eckd_set_attrib(device, argp); 45411107ccfbSChristoph Hellwig case BIODASDPSRD: 45421107ccfbSChristoph Hellwig return dasd_eckd_performance(device, argp); 45431107ccfbSChristoph Hellwig case BIODASDRLSE: 45441107ccfbSChristoph Hellwig return dasd_eckd_release(device); 45451107ccfbSChristoph Hellwig case BIODASDRSRV: 45461107ccfbSChristoph Hellwig return dasd_eckd_reserve(device); 45471107ccfbSChristoph Hellwig case BIODASDSLCK: 45481107ccfbSChristoph Hellwig return dasd_eckd_steal_lock(device); 4549196339f1SStefan Weinhuber case BIODASDSNID: 4550196339f1SStefan Weinhuber return dasd_eckd_snid(device, argp); 4551ab1d848fSNigel Hislop case BIODASDSYMMIO: 4552ab1d848fSNigel Hislop return dasd_symm_io(device, argp); 45531107ccfbSChristoph Hellwig default: 45546b79d14eSHeiko Carstens return -ENOTTY; 45551107ccfbSChristoph Hellwig } 45561107ccfbSChristoph Hellwig } 45571107ccfbSChristoph Hellwig 45581da177e4SLinus Torvalds /* 4559445b5b49SHorst Hummel * Dump the range of CCWs into 'page' buffer 4560445b5b49SHorst Hummel * and return number of printed chars. 4561445b5b49SHorst Hummel */ 45624d284cacSHeiko Carstens static int 4563445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 4564445b5b49SHorst Hummel { 4565445b5b49SHorst Hummel int len, count; 4566445b5b49SHorst Hummel char *datap; 4567445b5b49SHorst Hummel 4568445b5b49SHorst Hummel len = 0; 4569445b5b49SHorst Hummel while (from <= to) { 4570773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4571445b5b49SHorst Hummel " CCW %p: %08X %08X DAT:", 4572445b5b49SHorst Hummel from, ((int *) from)[0], ((int *) from)[1]); 4573445b5b49SHorst Hummel 4574445b5b49SHorst Hummel /* get pointer to data (consider IDALs) */ 4575445b5b49SHorst Hummel if (from->flags & CCW_FLAG_IDA) 4576445b5b49SHorst Hummel datap = (char *) *((addr_t *) (addr_t) from->cda); 4577445b5b49SHorst Hummel else 4578445b5b49SHorst Hummel datap = (char *) ((addr_t) from->cda); 4579445b5b49SHorst Hummel 4580445b5b49SHorst Hummel /* dump data (max 32 bytes) */ 4581445b5b49SHorst Hummel for (count = 0; count < from->count && count < 32; count++) { 4582445b5b49SHorst Hummel if (count % 8 == 0) len += sprintf(page + len, " "); 4583445b5b49SHorst Hummel if (count % 4 == 0) len += sprintf(page + len, " "); 4584445b5b49SHorst Hummel len += sprintf(page + len, "%02x", datap[count]); 4585445b5b49SHorst Hummel } 4586445b5b49SHorst Hummel len += sprintf(page + len, "\n"); 4587445b5b49SHorst Hummel from++; 4588445b5b49SHorst Hummel } 4589445b5b49SHorst Hummel return len; 4590445b5b49SHorst Hummel } 4591445b5b49SHorst Hummel 4592fc19f381SStefan Haberland static void 4593aeec92caSStefan Haberland dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 4594aeec92caSStefan Haberland char *reason) 4595fc19f381SStefan Haberland { 4596fc19f381SStefan Haberland u64 *sense; 4597a5a0061fSStefan Weinhuber u64 *stat; 4598fc19f381SStefan Haberland 4599aeec92caSStefan Haberland sense = (u64 *) dasd_get_sense(irb); 4600a5a0061fSStefan Weinhuber stat = (u64 *) &irb->scsw; 4601fc19f381SStefan Haberland if (sense) { 4602a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " 4603a5a0061fSStefan Weinhuber "%016llx %016llx %016llx %016llx", 4604a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 4605ed3640b2SStefan Haberland sense[0], sense[1], sense[2], sense[3]); 4606fc19f381SStefan Haberland } else { 4607a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", 4608a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 4609a5a0061fSStefan Weinhuber "NO VALID SENSE"); 4610fc19f381SStefan Haberland } 4611fc19f381SStefan Haberland } 4612fc19f381SStefan Haberland 4613445b5b49SHorst Hummel /* 46141da177e4SLinus Torvalds * Print sense data and related channel program. 46151da177e4SLinus Torvalds * Parts are printed because printk buffer is only 1024 bytes. 46161da177e4SLinus Torvalds */ 4617f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 46188e09f215SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 46191da177e4SLinus Torvalds { 46201da177e4SLinus Torvalds char *page; 4621445b5b49SHorst Hummel struct ccw1 *first, *last, *fail, *from, *to; 4622445b5b49SHorst Hummel int len, sl, sct; 46231da177e4SLinus Torvalds 46241da177e4SLinus Torvalds page = (char *) get_zeroed_page(GFP_ATOMIC); 46251da177e4SLinus Torvalds if (page == NULL) { 4626fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 4627fc19f381SStefan Haberland "No memory to dump sense data\n"); 46281da177e4SLinus Torvalds return; 46291da177e4SLinus Torvalds } 4630445b5b49SHorst Hummel /* dump the sense data */ 4631773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 46321da177e4SLinus Torvalds " I/O status report for device %s:\n", 46332a0217d5SKay Sievers dev_name(&device->cdev->dev)); 4634773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4635a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 4636a5a0061fSStefan Weinhuber "CS:%02X RC:%d\n", 4637a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 4638a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 4639a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 4640a5a0061fSStefan Weinhuber req ? req->intrc : 0); 4641773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 46421da177e4SLinus Torvalds " device %s: Failing CCW: %p\n", 46432a0217d5SKay Sievers dev_name(&device->cdev->dev), 464423d805b6SPeter Oberparleiter (void *) (addr_t) irb->scsw.cmd.cpa); 46451da177e4SLinus Torvalds if (irb->esw.esw0.erw.cons) { 46461da177e4SLinus Torvalds for (sl = 0; sl < 4; sl++) { 4647773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 46481da177e4SLinus Torvalds " Sense(hex) %2d-%2d:", 46491da177e4SLinus Torvalds (8 * sl), ((8 * sl) + 7)); 46501da177e4SLinus Torvalds 46511da177e4SLinus Torvalds for (sct = 0; sct < 8; sct++) { 46521da177e4SLinus Torvalds len += sprintf(page + len, " %02x", 46531da177e4SLinus Torvalds irb->ecw[8 * sl + sct]); 46541da177e4SLinus Torvalds } 46551da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 46561da177e4SLinus Torvalds } 46571da177e4SLinus Torvalds 46581da177e4SLinus Torvalds if (irb->ecw[27] & DASD_SENSE_BIT_0) { 46591da177e4SLinus Torvalds /* 24 Byte Sense Data */ 4660773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 46611da177e4SLinus Torvalds " 24 Byte: %x MSG %x, " 46621da177e4SLinus Torvalds "%s MSGb to SYSOP\n", 46631da177e4SLinus Torvalds irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 46641da177e4SLinus Torvalds irb->ecw[1] & 0x10 ? "" : "no"); 46651da177e4SLinus Torvalds } else { 46661da177e4SLinus Torvalds /* 32 Byte Sense Data */ 4667773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 46681da177e4SLinus Torvalds " 32 Byte: Format: %x " 46691da177e4SLinus Torvalds "Exception class %x\n", 46701da177e4SLinus Torvalds irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 46711da177e4SLinus Torvalds } 46721da177e4SLinus Torvalds } else { 4673773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 46741da177e4SLinus Torvalds " SORRY - NO VALID SENSE AVAILABLE\n"); 46751da177e4SLinus Torvalds } 4676773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 46771da177e4SLinus Torvalds 46788e09f215SStefan Weinhuber if (req) { 46798e09f215SStefan Weinhuber /* req == NULL for unsolicited interrupts */ 4680445b5b49SHorst Hummel /* dump the Channel Program (max 140 Bytes per line) */ 4681445b5b49SHorst Hummel /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 4682445b5b49SHorst Hummel first = req->cpaddr; 4683445b5b49SHorst Hummel for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 4684445b5b49SHorst Hummel to = min(first + 6, last); 4685773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 46861da177e4SLinus Torvalds " Related CP in req: %p\n", req); 4687445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(first, to, page + len); 4688773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 46891da177e4SLinus Torvalds 4690445b5b49SHorst Hummel /* print failing CCW area (maximum 4) */ 4691445b5b49SHorst Hummel /* scsw->cda is either valid or zero */ 46921da177e4SLinus Torvalds len = 0; 4693445b5b49SHorst Hummel from = ++to; 469423d805b6SPeter Oberparleiter fail = (struct ccw1 *)(addr_t) 469523d805b6SPeter Oberparleiter irb->scsw.cmd.cpa; /* failing CCW */ 4696445b5b49SHorst Hummel if (from < fail - 2) { 4697445b5b49SHorst Hummel from = fail - 2; /* there is a gap - print header */ 4698773bab4aSSebastian Ott len += sprintf(page, PRINTK_HEADER "......\n"); 46991da177e4SLinus Torvalds } 4700445b5b49SHorst Hummel to = min(fail + 1, last); 4701445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, to, page + len); 47021da177e4SLinus Torvalds 4703445b5b49SHorst Hummel /* print last CCWs (maximum 2) */ 4704445b5b49SHorst Hummel from = max(from, ++to); 4705445b5b49SHorst Hummel if (from < last - 1) { 4706445b5b49SHorst Hummel from = last - 1; /* there is a gap - print header */ 4707773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER "......\n"); 47081da177e4SLinus Torvalds } 4709445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, last, page + len); 47101da177e4SLinus Torvalds if (len > 0) 4711773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 47128e09f215SStefan Weinhuber } 47131da177e4SLinus Torvalds free_page((unsigned long) page); 47141da177e4SLinus Torvalds } 47151da177e4SLinus Torvalds 4716f3eb5384SStefan Weinhuber 4717f3eb5384SStefan Weinhuber /* 4718f3eb5384SStefan Weinhuber * Print sense data from a tcw. 4719f3eb5384SStefan Weinhuber */ 4720f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 4721f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 4722f3eb5384SStefan Weinhuber { 4723f3eb5384SStefan Weinhuber char *page; 4724f3eb5384SStefan Weinhuber int len, sl, sct, residual; 4725f3eb5384SStefan Weinhuber struct tsb *tsb; 4726ef19298bSStefan Weinhuber u8 *sense, *rcq; 4727f3eb5384SStefan Weinhuber 4728f3eb5384SStefan Weinhuber page = (char *) get_zeroed_page(GFP_ATOMIC); 4729f3eb5384SStefan Weinhuber if (page == NULL) { 4730fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, " %s", 4731f3eb5384SStefan Weinhuber "No memory to dump sense data"); 4732f3eb5384SStefan Weinhuber return; 4733f3eb5384SStefan Weinhuber } 4734f3eb5384SStefan Weinhuber /* dump the sense data */ 4735773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 4736f3eb5384SStefan Weinhuber " I/O status report for device %s:\n", 4737f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev)); 4738773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4739a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 4740a5a0061fSStefan Weinhuber "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", 4741a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 4742a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 4743a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 4744a521b048SStefan Haberland irb->scsw.tm.fcxs, 4745a521b048SStefan Haberland (irb->scsw.tm.ifob << 7) | irb->scsw.tm.sesq, 4746a5a0061fSStefan Weinhuber req ? req->intrc : 0); 4747773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4748f3eb5384SStefan Weinhuber " device %s: Failing TCW: %p\n", 4749f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev), 4750f3eb5384SStefan Weinhuber (void *) (addr_t) irb->scsw.tm.tcw); 4751f3eb5384SStefan Weinhuber 4752f3eb5384SStefan Weinhuber tsb = NULL; 4753f3eb5384SStefan Weinhuber sense = NULL; 4754a5a0061fSStefan Weinhuber if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) 4755f3eb5384SStefan Weinhuber tsb = tcw_get_tsb( 4756f3eb5384SStefan Weinhuber (struct tcw *)(unsigned long)irb->scsw.tm.tcw); 4757f3eb5384SStefan Weinhuber 4758b8fde722SStefan Haberland if (tsb) { 4759773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4760f3eb5384SStefan Weinhuber " tsb->length %d\n", tsb->length); 4761773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4762f3eb5384SStefan Weinhuber " tsb->flags %x\n", tsb->flags); 4763773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4764f3eb5384SStefan Weinhuber " tsb->dcw_offset %d\n", tsb->dcw_offset); 4765773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4766f3eb5384SStefan Weinhuber " tsb->count %d\n", tsb->count); 4767f3eb5384SStefan Weinhuber residual = tsb->count - 28; 4768773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4769f3eb5384SStefan Weinhuber " residual %d\n", residual); 4770f3eb5384SStefan Weinhuber 4771f3eb5384SStefan Weinhuber switch (tsb->flags & 0x07) { 4772f3eb5384SStefan Weinhuber case 1: /* tsa_iostat */ 4773773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4774f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_time %d\n", 4775f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_time); 4776773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4777f3eb5384SStefan Weinhuber " tsb->tsa.iostat.def_time %d\n", 4778f3eb5384SStefan Weinhuber tsb->tsa.iostat.def_time); 4779773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4780f3eb5384SStefan Weinhuber " tsb->tsa.iostat.queue_time %d\n", 4781f3eb5384SStefan Weinhuber tsb->tsa.iostat.queue_time); 4782773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4783f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_busy_time %d\n", 4784f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_busy_time); 4785773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4786f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_act_time %d\n", 4787f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_act_time); 4788f3eb5384SStefan Weinhuber sense = tsb->tsa.iostat.sense; 4789f3eb5384SStefan Weinhuber break; 4790f3eb5384SStefan Weinhuber case 2: /* ts_ddpc */ 4791773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4792f3eb5384SStefan Weinhuber " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); 4793ef19298bSStefan Weinhuber for (sl = 0; sl < 2; sl++) { 4794773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4795ef19298bSStefan Weinhuber " tsb->tsa.ddpc.rcq %2d-%2d: ", 4796ef19298bSStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 4797ef19298bSStefan Weinhuber rcq = tsb->tsa.ddpc.rcq; 4798f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 4799f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 4800ef19298bSStefan Weinhuber rcq[8 * sl + sct]); 4801f3eb5384SStefan Weinhuber } 4802f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 4803f3eb5384SStefan Weinhuber } 4804f3eb5384SStefan Weinhuber sense = tsb->tsa.ddpc.sense; 4805f3eb5384SStefan Weinhuber break; 4806f3eb5384SStefan Weinhuber case 3: /* tsa_intrg */ 4807773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 48088693b914SColin Ian King " tsb->tsa.intrg.: not supported yet\n"); 4809f3eb5384SStefan Weinhuber break; 4810f3eb5384SStefan Weinhuber } 4811f3eb5384SStefan Weinhuber 4812f3eb5384SStefan Weinhuber if (sense) { 4813f3eb5384SStefan Weinhuber for (sl = 0; sl < 4; sl++) { 4814773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4815f3eb5384SStefan Weinhuber " Sense(hex) %2d-%2d:", 4816f3eb5384SStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 4817f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 4818f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 4819f3eb5384SStefan Weinhuber sense[8 * sl + sct]); 4820f3eb5384SStefan Weinhuber } 4821f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 4822f3eb5384SStefan Weinhuber } 4823f3eb5384SStefan Weinhuber 4824f3eb5384SStefan Weinhuber if (sense[27] & DASD_SENSE_BIT_0) { 4825f3eb5384SStefan Weinhuber /* 24 Byte Sense Data */ 4826773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4827f3eb5384SStefan Weinhuber " 24 Byte: %x MSG %x, " 4828f3eb5384SStefan Weinhuber "%s MSGb to SYSOP\n", 4829f3eb5384SStefan Weinhuber sense[7] >> 4, sense[7] & 0x0f, 4830f3eb5384SStefan Weinhuber sense[1] & 0x10 ? "" : "no"); 4831f3eb5384SStefan Weinhuber } else { 4832f3eb5384SStefan Weinhuber /* 32 Byte Sense Data */ 4833773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4834f3eb5384SStefan Weinhuber " 32 Byte: Format: %x " 4835f3eb5384SStefan Weinhuber "Exception class %x\n", 4836f3eb5384SStefan Weinhuber sense[6] & 0x0f, sense[22] >> 4); 4837f3eb5384SStefan Weinhuber } 4838f3eb5384SStefan Weinhuber } else { 4839773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4840f3eb5384SStefan Weinhuber " SORRY - NO VALID SENSE AVAILABLE\n"); 4841f3eb5384SStefan Weinhuber } 4842f3eb5384SStefan Weinhuber } else { 4843773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 4844f3eb5384SStefan Weinhuber " SORRY - NO TSB DATA AVAILABLE\n"); 4845f3eb5384SStefan Weinhuber } 4846773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 4847f3eb5384SStefan Weinhuber free_page((unsigned long) page); 4848f3eb5384SStefan Weinhuber } 4849f3eb5384SStefan Weinhuber 4850f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense(struct dasd_device *device, 4851f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 4852f3eb5384SStefan Weinhuber { 48538fd57520SJan Höppner u8 *sense = dasd_get_sense(irb); 48548fd57520SJan Höppner 48558fd57520SJan Höppner if (scsw_is_tm(&irb->scsw)) { 48568fd57520SJan Höppner /* 48578fd57520SJan Höppner * In some cases the 'File Protected' or 'Incorrect Length' 48588fd57520SJan Höppner * error might be expected and log messages shouldn't be written 48598fd57520SJan Höppner * then. Check if the according suppress bit is set. 48608fd57520SJan Höppner */ 48618fd57520SJan Höppner if (sense && (sense[1] & SNS1_FILE_PROTECTED) && 48628fd57520SJan Höppner test_bit(DASD_CQR_SUPPRESS_FP, &req->flags)) 48638fd57520SJan Höppner return; 48648fd57520SJan Höppner if (scsw_cstat(&irb->scsw) == 0x40 && 48658fd57520SJan Höppner test_bit(DASD_CQR_SUPPRESS_IL, &req->flags)) 48668fd57520SJan Höppner return; 48678fd57520SJan Höppner 4868f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_tcw(device, req, irb); 48698fd57520SJan Höppner } else { 48708fd57520SJan Höppner /* 4871ab24fbd3SStefan Haberland * In some cases the 'Command Reject' or 'No Record Found' 4872ab24fbd3SStefan Haberland * error might be expected and log messages shouldn't be 4873ab24fbd3SStefan Haberland * written then. Check if the according suppress bit is set. 48748fd57520SJan Höppner */ 4875ab24fbd3SStefan Haberland if (sense && sense[0] & SNS0_CMD_REJECT && 4876ab24fbd3SStefan Haberland test_bit(DASD_CQR_SUPPRESS_CR, &req->flags)) 4877ab24fbd3SStefan Haberland return; 4878ab24fbd3SStefan Haberland 48798fd57520SJan Höppner if (sense && sense[1] & SNS1_NO_REC_FOUND && 48808fd57520SJan Höppner test_bit(DASD_CQR_SUPPRESS_NRF, &req->flags)) 48818fd57520SJan Höppner return; 48828fd57520SJan Höppner 4883f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_ccw(device, req, irb); 4884f3eb5384SStefan Weinhuber } 48858fd57520SJan Höppner } 4886f3eb5384SStefan Weinhuber 4887501183f2SStefan Haberland static int dasd_eckd_pm_freeze(struct dasd_device *device) 4888d41dd122SStefan Haberland { 4889d41dd122SStefan Haberland /* 4890d41dd122SStefan Haberland * the device should be disconnected from our LCU structure 4891d41dd122SStefan Haberland * on restore we will reconnect it and reread LCU specific 4892d41dd122SStefan Haberland * information like PAV support that might have changed 4893d41dd122SStefan Haberland */ 4894d41dd122SStefan Haberland dasd_alias_remove_device(device); 4895d41dd122SStefan Haberland dasd_alias_disconnect_device_from_lcu(device); 4896d41dd122SStefan Haberland 4897d41dd122SStefan Haberland return 0; 4898d41dd122SStefan Haberland } 4899d41dd122SStefan Haberland 4900501183f2SStefan Haberland static int dasd_eckd_restore_device(struct dasd_device *device) 4901d41dd122SStefan Haberland { 4902543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 49036fca97a9SStefan Haberland struct dasd_eckd_characteristics temp_rdc_data; 4904f9f8d02fSStefan Haberland int rc; 4905d41dd122SStefan Haberland struct dasd_uid temp_uid; 4906a7602f6cSStefan Haberland unsigned long flags; 4907ea4da6eaSStefan Haberland unsigned long cqr_flags = 0; 4908d41dd122SStefan Haberland 4909d41dd122SStefan Haberland /* Read Configuration Data */ 4910251afd69SStefan Haberland rc = dasd_eckd_read_conf(device); 4911251afd69SStefan Haberland if (rc) { 4912251afd69SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 4913251afd69SStefan Haberland "Read configuration data failed, rc=%d", rc); 4914251afd69SStefan Haberland goto out_err; 4915251afd69SStefan Haberland } 4916d41dd122SStefan Haberland 49172dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 49182dedf0d9SStefan Haberland /* Generate device unique id */ 49192dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 49202dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4921d41dd122SStefan Haberland if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) 4922a7602f6cSStefan Haberland dev_err(&device->cdev->dev, "The UID of the DASD has " 4923a7602f6cSStefan Haberland "changed\n"); 49242dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4925d41dd122SStefan Haberland if (rc) 4926d41dd122SStefan Haberland goto out_err; 4927d41dd122SStefan Haberland 4928d41dd122SStefan Haberland /* register lcu with alias handling, enable PAV if this is a new lcu */ 4929f9f8d02fSStefan Haberland rc = dasd_alias_make_device_known_to_lcu(device); 4930f9f8d02fSStefan Haberland if (rc) 4931251afd69SStefan Haberland goto out_err; 4932ea4da6eaSStefan Haberland 4933ea4da6eaSStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr_flags); 4934ea4da6eaSStefan Haberland dasd_eckd_validate_server(device, cqr_flags); 4935f4ac1d02SStefan Weinhuber 4936f4ac1d02SStefan Weinhuber /* RE-Read Configuration Data */ 4937251afd69SStefan Haberland rc = dasd_eckd_read_conf(device); 4938251afd69SStefan Haberland if (rc) { 4939251afd69SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 4940251afd69SStefan Haberland "Read configuration data failed, rc=%d", rc); 4941251afd69SStefan Haberland goto out_err2; 4942251afd69SStefan Haberland } 4943d41dd122SStefan Haberland 4944d41dd122SStefan Haberland /* Read Feature Codes */ 494568d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 4946d41dd122SStefan Haberland 4947d41dd122SStefan Haberland /* Read Device Characteristics */ 494868b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 49496fca97a9SStefan Haberland &temp_rdc_data, 64); 4950d41dd122SStefan Haberland if (rc) { 4951b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 4952b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 4953251afd69SStefan Haberland goto out_err2; 4954d41dd122SStefan Haberland } 4955a7602f6cSStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 49566fca97a9SStefan Haberland memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data)); 4957a7602f6cSStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 4958d41dd122SStefan Haberland 4959d41dd122SStefan Haberland /* add device to alias management */ 4960d41dd122SStefan Haberland dasd_alias_add_device(device); 4961d41dd122SStefan Haberland 4962d41dd122SStefan Haberland return 0; 4963d41dd122SStefan Haberland 4964251afd69SStefan Haberland out_err2: 4965251afd69SStefan Haberland dasd_alias_disconnect_device_from_lcu(device); 4966d41dd122SStefan Haberland out_err: 4967e6125fbaSStefan Haberland return -1; 4968d41dd122SStefan Haberland } 4969d41dd122SStefan Haberland 4970501183f2SStefan Haberland static int dasd_eckd_reload_device(struct dasd_device *device) 4971501183f2SStefan Haberland { 4972543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 4973501183f2SStefan Haberland int rc, old_base; 49742dedf0d9SStefan Haberland char print_uid[60]; 49752dedf0d9SStefan Haberland struct dasd_uid uid; 49762dedf0d9SStefan Haberland unsigned long flags; 4977501183f2SStefan Haberland 497859a9ed5fSStefan Haberland /* 497959a9ed5fSStefan Haberland * remove device from alias handling to prevent new requests 498059a9ed5fSStefan Haberland * from being scheduled on the wrong alias device 498159a9ed5fSStefan Haberland */ 498259a9ed5fSStefan Haberland dasd_alias_remove_device(device); 498359a9ed5fSStefan Haberland 49842dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 4985501183f2SStefan Haberland old_base = private->uid.base_unit_addr; 49862dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 49872dedf0d9SStefan Haberland 4988501183f2SStefan Haberland /* Read Configuration Data */ 4989501183f2SStefan Haberland rc = dasd_eckd_read_conf(device); 4990501183f2SStefan Haberland if (rc) 4991501183f2SStefan Haberland goto out_err; 4992501183f2SStefan Haberland 49932dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 4994501183f2SStefan Haberland if (rc) 4995501183f2SStefan Haberland goto out_err; 4996501183f2SStefan Haberland /* 4997501183f2SStefan Haberland * update unit address configuration and 4998501183f2SStefan Haberland * add device to alias management 4999501183f2SStefan Haberland */ 5000501183f2SStefan Haberland dasd_alias_update_add_device(device); 5001501183f2SStefan Haberland 50022dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &uid); 50032dedf0d9SStefan Haberland 50042dedf0d9SStefan Haberland if (old_base != uid.base_unit_addr) { 50052dedf0d9SStefan Haberland if (strlen(uid.vduit) > 0) 50062dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 50072dedf0d9SStefan Haberland "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial, 50082dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr, uid.vduit); 5009501183f2SStefan Haberland else 50102dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 50112dedf0d9SStefan Haberland "%s.%s.%04x.%02x", uid.vendor, uid.serial, 50122dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr); 5013501183f2SStefan Haberland 5014501183f2SStefan Haberland dev_info(&device->cdev->dev, 5015501183f2SStefan Haberland "An Alias device was reassigned to a new base device " 50162dedf0d9SStefan Haberland "with UID: %s\n", print_uid); 5017501183f2SStefan Haberland } 5018501183f2SStefan Haberland return 0; 5019501183f2SStefan Haberland 5020501183f2SStefan Haberland out_err: 5021501183f2SStefan Haberland return -1; 5022501183f2SStefan Haberland } 5023501183f2SStefan Haberland 50245db8440cSStefan Haberland static int dasd_eckd_read_message_buffer(struct dasd_device *device, 50255db8440cSStefan Haberland struct dasd_rssd_messages *messages, 50265db8440cSStefan Haberland __u8 lpum) 50275db8440cSStefan Haberland { 50285db8440cSStefan Haberland struct dasd_rssd_messages *message_buf; 50295db8440cSStefan Haberland struct dasd_psf_prssd_data *prssdp; 50305db8440cSStefan Haberland struct dasd_ccw_req *cqr; 50315db8440cSStefan Haberland struct ccw1 *ccw; 50325db8440cSStefan Haberland int rc; 50335db8440cSStefan Haberland 50345db8440cSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 50355db8440cSStefan Haberland (sizeof(struct dasd_psf_prssd_data) + 50365db8440cSStefan Haberland sizeof(struct dasd_rssd_messages)), 5037c5205f2fSSebastian Ott device, NULL); 50385db8440cSStefan Haberland if (IS_ERR(cqr)) { 50395db8440cSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 50405db8440cSStefan Haberland "Could not allocate read message buffer request"); 50415db8440cSStefan Haberland return PTR_ERR(cqr); 50425db8440cSStefan Haberland } 50435db8440cSStefan Haberland 5044af775210SStefan Haberland cqr->lpm = lpum; 5045af775210SStefan Haberland retry: 50465db8440cSStefan Haberland cqr->startdev = device; 50475db8440cSStefan Haberland cqr->memdev = device; 50485db8440cSStefan Haberland cqr->block = NULL; 50495db8440cSStefan Haberland cqr->expires = 10 * HZ; 50505db8440cSStefan Haberland set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 5051b179b037SStefan Haberland /* dasd_sleep_on_immediatly does not do complex error 5052b179b037SStefan Haberland * recovery so clear erp flag and set retry counter to 5053b179b037SStefan Haberland * do basic erp */ 5054b179b037SStefan Haberland clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 5055b179b037SStefan Haberland cqr->retries = 256; 50565db8440cSStefan Haberland 50575db8440cSStefan Haberland /* Prepare for Read Subsystem Data */ 50585db8440cSStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 50595db8440cSStefan Haberland memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 50605db8440cSStefan Haberland prssdp->order = PSF_ORDER_PRSSD; 50615db8440cSStefan Haberland prssdp->suborder = 0x03; /* Message Buffer */ 50625db8440cSStefan Haberland /* all other bytes of prssdp must be zero */ 50635db8440cSStefan Haberland 50645db8440cSStefan Haberland ccw = cqr->cpaddr; 50655db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 50665db8440cSStefan Haberland ccw->count = sizeof(struct dasd_psf_prssd_data); 50675db8440cSStefan Haberland ccw->flags |= CCW_FLAG_CC; 50685db8440cSStefan Haberland ccw->flags |= CCW_FLAG_SLI; 50695db8440cSStefan Haberland ccw->cda = (__u32)(addr_t) prssdp; 50705db8440cSStefan Haberland 50715db8440cSStefan Haberland /* Read Subsystem Data - message buffer */ 50725db8440cSStefan Haberland message_buf = (struct dasd_rssd_messages *) (prssdp + 1); 50735db8440cSStefan Haberland memset(message_buf, 0, sizeof(struct dasd_rssd_messages)); 50745db8440cSStefan Haberland 50755db8440cSStefan Haberland ccw++; 50765db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_RSSD; 50775db8440cSStefan Haberland ccw->count = sizeof(struct dasd_rssd_messages); 50785db8440cSStefan Haberland ccw->flags |= CCW_FLAG_SLI; 50795db8440cSStefan Haberland ccw->cda = (__u32)(addr_t) message_buf; 50805db8440cSStefan Haberland 50815db8440cSStefan Haberland cqr->buildclk = get_tod_clock(); 50825db8440cSStefan Haberland cqr->status = DASD_CQR_FILLED; 50835db8440cSStefan Haberland rc = dasd_sleep_on_immediatly(cqr); 50845db8440cSStefan Haberland if (rc == 0) { 50855db8440cSStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 50865db8440cSStefan Haberland message_buf = (struct dasd_rssd_messages *) 50875db8440cSStefan Haberland (prssdp + 1); 50885db8440cSStefan Haberland memcpy(messages, message_buf, 50895db8440cSStefan Haberland sizeof(struct dasd_rssd_messages)); 5090af775210SStefan Haberland } else if (cqr->lpm) { 5091af775210SStefan Haberland /* 5092af775210SStefan Haberland * on z/VM we might not be able to do I/O on the requested path 5093af775210SStefan Haberland * but instead we get the required information on any path 5094af775210SStefan Haberland * so retry with open path mask 5095af775210SStefan Haberland */ 5096af775210SStefan Haberland cqr->lpm = 0; 5097af775210SStefan Haberland goto retry; 50985db8440cSStefan Haberland } else 50995db8440cSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 51005db8440cSStefan Haberland "Reading messages failed with rc=%d\n" 51015db8440cSStefan Haberland , rc); 51025db8440cSStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 51035db8440cSStefan Haberland return rc; 51045db8440cSStefan Haberland } 51055db8440cSStefan Haberland 51065a3b7b11SStefan Haberland static int dasd_eckd_query_host_access(struct dasd_device *device, 51075a3b7b11SStefan Haberland struct dasd_psf_query_host_access *data) 51085a3b7b11SStefan Haberland { 51095a3b7b11SStefan Haberland struct dasd_eckd_private *private = device->private; 51105a3b7b11SStefan Haberland struct dasd_psf_query_host_access *host_access; 51115a3b7b11SStefan Haberland struct dasd_psf_prssd_data *prssdp; 51125a3b7b11SStefan Haberland struct dasd_ccw_req *cqr; 51135a3b7b11SStefan Haberland struct ccw1 *ccw; 51145a3b7b11SStefan Haberland int rc; 51155a3b7b11SStefan Haberland 51165a3b7b11SStefan Haberland /* not available for HYPER PAV alias devices */ 51175a3b7b11SStefan Haberland if (!device->block && private->lcu->pav == HYPER_PAV) 51185a3b7b11SStefan Haberland return -EOPNOTSUPP; 51195a3b7b11SStefan Haberland 5120ccd53fa2SStefan Haberland /* may not be supported by the storage server */ 5121ccd53fa2SStefan Haberland if (!(private->features.feature[14] & 0x80)) 5122ccd53fa2SStefan Haberland return -EOPNOTSUPP; 5123ccd53fa2SStefan Haberland 51245a3b7b11SStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 51255a3b7b11SStefan Haberland sizeof(struct dasd_psf_prssd_data) + 1, 5126c5205f2fSSebastian Ott device, NULL); 51275a3b7b11SStefan Haberland if (IS_ERR(cqr)) { 51285a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 51295a3b7b11SStefan Haberland "Could not allocate read message buffer request"); 51305a3b7b11SStefan Haberland return PTR_ERR(cqr); 51315a3b7b11SStefan Haberland } 51325a3b7b11SStefan Haberland host_access = kzalloc(sizeof(*host_access), GFP_KERNEL | GFP_DMA); 51335a3b7b11SStefan Haberland if (!host_access) { 51345a3b7b11SStefan Haberland dasd_sfree_request(cqr, device); 51355a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 51365a3b7b11SStefan Haberland "Could not allocate host_access buffer"); 51375a3b7b11SStefan Haberland return -ENOMEM; 51385a3b7b11SStefan Haberland } 51395a3b7b11SStefan Haberland cqr->startdev = device; 51405a3b7b11SStefan Haberland cqr->memdev = device; 51415a3b7b11SStefan Haberland cqr->block = NULL; 51425a3b7b11SStefan Haberland cqr->retries = 256; 51435a3b7b11SStefan Haberland cqr->expires = 10 * HZ; 51445a3b7b11SStefan Haberland 51455a3b7b11SStefan Haberland /* Prepare for Read Subsystem Data */ 51465a3b7b11SStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 51475a3b7b11SStefan Haberland memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 51485a3b7b11SStefan Haberland prssdp->order = PSF_ORDER_PRSSD; 51495a3b7b11SStefan Haberland prssdp->suborder = PSF_SUBORDER_QHA; /* query host access */ 51505a3b7b11SStefan Haberland /* LSS and Volume that will be queried */ 51515a3b7b11SStefan Haberland prssdp->lss = private->ned->ID; 51525a3b7b11SStefan Haberland prssdp->volume = private->ned->unit_addr; 51535a3b7b11SStefan Haberland /* all other bytes of prssdp must be zero */ 51545a3b7b11SStefan Haberland 51555a3b7b11SStefan Haberland ccw = cqr->cpaddr; 51565a3b7b11SStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 51575a3b7b11SStefan Haberland ccw->count = sizeof(struct dasd_psf_prssd_data); 51585a3b7b11SStefan Haberland ccw->flags |= CCW_FLAG_CC; 51595a3b7b11SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 51605a3b7b11SStefan Haberland ccw->cda = (__u32)(addr_t) prssdp; 51615a3b7b11SStefan Haberland 51625a3b7b11SStefan Haberland /* Read Subsystem Data - query host access */ 51635a3b7b11SStefan Haberland ccw++; 51645a3b7b11SStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_RSSD; 51655a3b7b11SStefan Haberland ccw->count = sizeof(struct dasd_psf_query_host_access); 51665a3b7b11SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 51675a3b7b11SStefan Haberland ccw->cda = (__u32)(addr_t) host_access; 51685a3b7b11SStefan Haberland 51695a3b7b11SStefan Haberland cqr->buildclk = get_tod_clock(); 51705a3b7b11SStefan Haberland cqr->status = DASD_CQR_FILLED; 5171ab24fbd3SStefan Haberland /* the command might not be supported, suppress error message */ 5172ab24fbd3SStefan Haberland __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); 5173f50af850SStefan Haberland rc = dasd_sleep_on_interruptible(cqr); 51745a3b7b11SStefan Haberland if (rc == 0) { 51755a3b7b11SStefan Haberland *data = *host_access; 51765a3b7b11SStefan Haberland } else { 51775a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 51785a3b7b11SStefan Haberland "Reading host access data failed with rc=%d\n", 51795a3b7b11SStefan Haberland rc); 51805a3b7b11SStefan Haberland rc = -EOPNOTSUPP; 51815a3b7b11SStefan Haberland } 51825a3b7b11SStefan Haberland 51835a3b7b11SStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 51845a3b7b11SStefan Haberland kfree(host_access); 51855a3b7b11SStefan Haberland return rc; 51865a3b7b11SStefan Haberland } 51875a3b7b11SStefan Haberland /* 51885a3b7b11SStefan Haberland * return number of grouped devices 51895a3b7b11SStefan Haberland */ 51905a3b7b11SStefan Haberland static int dasd_eckd_host_access_count(struct dasd_device *device) 51915a3b7b11SStefan Haberland { 51925a3b7b11SStefan Haberland struct dasd_psf_query_host_access *access; 51935a3b7b11SStefan Haberland struct dasd_ckd_path_group_entry *entry; 51945a3b7b11SStefan Haberland struct dasd_ckd_host_information *info; 51955a3b7b11SStefan Haberland int count = 0; 51965a3b7b11SStefan Haberland int rc, i; 51975a3b7b11SStefan Haberland 51985a3b7b11SStefan Haberland access = kzalloc(sizeof(*access), GFP_NOIO); 51995a3b7b11SStefan Haberland if (!access) { 52005a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 52015a3b7b11SStefan Haberland "Could not allocate access buffer"); 52025a3b7b11SStefan Haberland return -ENOMEM; 52035a3b7b11SStefan Haberland } 52045a3b7b11SStefan Haberland rc = dasd_eckd_query_host_access(device, access); 52055a3b7b11SStefan Haberland if (rc) { 52065a3b7b11SStefan Haberland kfree(access); 52075a3b7b11SStefan Haberland return rc; 52085a3b7b11SStefan Haberland } 52095a3b7b11SStefan Haberland 52105a3b7b11SStefan Haberland info = (struct dasd_ckd_host_information *) 52115a3b7b11SStefan Haberland access->host_access_information; 52125a3b7b11SStefan Haberland for (i = 0; i < info->entry_count; i++) { 52135a3b7b11SStefan Haberland entry = (struct dasd_ckd_path_group_entry *) 52145a3b7b11SStefan Haberland (info->entry + i * info->entry_size); 52155a3b7b11SStefan Haberland if (entry->status_flags & DASD_ECKD_PG_GROUPED) 52165a3b7b11SStefan Haberland count++; 52175a3b7b11SStefan Haberland } 52185a3b7b11SStefan Haberland 52195a3b7b11SStefan Haberland kfree(access); 52205a3b7b11SStefan Haberland return count; 52215a3b7b11SStefan Haberland } 52225a3b7b11SStefan Haberland 52235a3b7b11SStefan Haberland /* 52245a3b7b11SStefan Haberland * write host access information to a sequential file 52255a3b7b11SStefan Haberland */ 52265a3b7b11SStefan Haberland static int dasd_hosts_print(struct dasd_device *device, struct seq_file *m) 52275a3b7b11SStefan Haberland { 52285a3b7b11SStefan Haberland struct dasd_psf_query_host_access *access; 52295a3b7b11SStefan Haberland struct dasd_ckd_path_group_entry *entry; 52305a3b7b11SStefan Haberland struct dasd_ckd_host_information *info; 52315a3b7b11SStefan Haberland char sysplex[9] = ""; 5232c7848e14SChristophe JAILLET int rc, i; 52335a3b7b11SStefan Haberland 52345a3b7b11SStefan Haberland access = kzalloc(sizeof(*access), GFP_NOIO); 52355a3b7b11SStefan Haberland if (!access) { 52365a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 52375a3b7b11SStefan Haberland "Could not allocate access buffer"); 52385a3b7b11SStefan Haberland return -ENOMEM; 52395a3b7b11SStefan Haberland } 52405a3b7b11SStefan Haberland rc = dasd_eckd_query_host_access(device, access); 52415a3b7b11SStefan Haberland if (rc) { 52425a3b7b11SStefan Haberland kfree(access); 52435a3b7b11SStefan Haberland return rc; 52445a3b7b11SStefan Haberland } 52455a3b7b11SStefan Haberland 52465a3b7b11SStefan Haberland info = (struct dasd_ckd_host_information *) 52475a3b7b11SStefan Haberland access->host_access_information; 52485a3b7b11SStefan Haberland for (i = 0; i < info->entry_count; i++) { 52495a3b7b11SStefan Haberland entry = (struct dasd_ckd_path_group_entry *) 52505a3b7b11SStefan Haberland (info->entry + i * info->entry_size); 52515a3b7b11SStefan Haberland /* PGID */ 5252c7848e14SChristophe JAILLET seq_printf(m, "pgid %*phN\n", 11, entry->pgid); 52535a3b7b11SStefan Haberland /* FLAGS */ 52545a3b7b11SStefan Haberland seq_printf(m, "status_flags %02x\n", entry->status_flags); 52555a3b7b11SStefan Haberland /* SYSPLEX NAME */ 52565a3b7b11SStefan Haberland memcpy(&sysplex, &entry->sysplex_name, sizeof(sysplex) - 1); 52575a3b7b11SStefan Haberland EBCASC(sysplex, sizeof(sysplex)); 52585a3b7b11SStefan Haberland seq_printf(m, "sysplex_name %8s\n", sysplex); 52595a3b7b11SStefan Haberland /* SUPPORTED CYLINDER */ 52605a3b7b11SStefan Haberland seq_printf(m, "supported_cylinder %d\n", entry->cylinder); 52615a3b7b11SStefan Haberland /* TIMESTAMP */ 52625a3b7b11SStefan Haberland seq_printf(m, "timestamp %lu\n", (unsigned long) 52635a3b7b11SStefan Haberland entry->timestamp); 52645a3b7b11SStefan Haberland } 52655a3b7b11SStefan Haberland kfree(access); 52665a3b7b11SStefan Haberland 52675a3b7b11SStefan Haberland return 0; 52685a3b7b11SStefan Haberland } 52695a3b7b11SStefan Haberland 52705db8440cSStefan Haberland /* 52715db8440cSStefan Haberland * Perform Subsystem Function - CUIR response 52725db8440cSStefan Haberland */ 52735db8440cSStefan Haberland static int 52745db8440cSStefan Haberland dasd_eckd_psf_cuir_response(struct dasd_device *device, int response, 5275a521b048SStefan Haberland __u32 message_id, __u8 lpum) 52765db8440cSStefan Haberland { 52775db8440cSStefan Haberland struct dasd_psf_cuir_response *psf_cuir; 5278a521b048SStefan Haberland int pos = pathmask_to_pos(lpum); 52795db8440cSStefan Haberland struct dasd_ccw_req *cqr; 52805db8440cSStefan Haberland struct ccw1 *ccw; 52815db8440cSStefan Haberland int rc; 52825db8440cSStefan Haberland 52835db8440cSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 52845db8440cSStefan Haberland sizeof(struct dasd_psf_cuir_response), 5285c5205f2fSSebastian Ott device, NULL); 52865db8440cSStefan Haberland 52875db8440cSStefan Haberland if (IS_ERR(cqr)) { 52885db8440cSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 52895db8440cSStefan Haberland "Could not allocate PSF-CUIR request"); 52905db8440cSStefan Haberland return PTR_ERR(cqr); 52915db8440cSStefan Haberland } 52925db8440cSStefan Haberland 52935db8440cSStefan Haberland psf_cuir = (struct dasd_psf_cuir_response *)cqr->data; 52945db8440cSStefan Haberland psf_cuir->order = PSF_ORDER_CUIR_RESPONSE; 52955db8440cSStefan Haberland psf_cuir->cc = response; 5296a521b048SStefan Haberland psf_cuir->chpid = device->path[pos].chpid; 52975db8440cSStefan Haberland psf_cuir->message_id = message_id; 5298a521b048SStefan Haberland psf_cuir->cssid = device->path[pos].cssid; 5299a521b048SStefan Haberland psf_cuir->ssid = device->path[pos].ssid; 53005db8440cSStefan Haberland ccw = cqr->cpaddr; 53015db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 53025db8440cSStefan Haberland ccw->cda = (__u32)(addr_t)psf_cuir; 5303b179b037SStefan Haberland ccw->flags = CCW_FLAG_SLI; 53045db8440cSStefan Haberland ccw->count = sizeof(struct dasd_psf_cuir_response); 53055db8440cSStefan Haberland 53065db8440cSStefan Haberland cqr->startdev = device; 53075db8440cSStefan Haberland cqr->memdev = device; 53085db8440cSStefan Haberland cqr->block = NULL; 53095db8440cSStefan Haberland cqr->retries = 256; 53105db8440cSStefan Haberland cqr->expires = 10*HZ; 53115db8440cSStefan Haberland cqr->buildclk = get_tod_clock(); 53125db8440cSStefan Haberland cqr->status = DASD_CQR_FILLED; 5313b179b037SStefan Haberland set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 53145db8440cSStefan Haberland 53155db8440cSStefan Haberland rc = dasd_sleep_on(cqr); 53165db8440cSStefan Haberland 53175db8440cSStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 53185db8440cSStefan Haberland return rc; 53195db8440cSStefan Haberland } 53205db8440cSStefan Haberland 5321b179b037SStefan Haberland /* 5322b179b037SStefan Haberland * return configuration data that is referenced by record selector 5323b179b037SStefan Haberland * if a record selector is specified or per default return the 5324b179b037SStefan Haberland * conf_data pointer for the path specified by lpum 5325b179b037SStefan Haberland */ 5326b179b037SStefan Haberland static struct dasd_conf_data *dasd_eckd_get_ref_conf(struct dasd_device *device, 5327b179b037SStefan Haberland __u8 lpum, 5328b179b037SStefan Haberland struct dasd_cuir_message *cuir) 53295db8440cSStefan Haberland { 5330b179b037SStefan Haberland struct dasd_conf_data *conf_data; 5331b179b037SStefan Haberland int path, pos; 53325db8440cSStefan Haberland 5333b179b037SStefan Haberland if (cuir->record_selector == 0) 5334b179b037SStefan Haberland goto out; 5335b179b037SStefan Haberland for (path = 0x80, pos = 0; path; path >>= 1, pos++) { 5336c9346151SStefan Haberland conf_data = device->path[pos].conf_data; 5337b179b037SStefan Haberland if (conf_data->gneq.record_selector == 5338b179b037SStefan Haberland cuir->record_selector) 5339b179b037SStefan Haberland return conf_data; 53405db8440cSStefan Haberland } 5341b179b037SStefan Haberland out: 5342c9346151SStefan Haberland return device->path[pathmask_to_pos(lpum)].conf_data; 53435db8440cSStefan Haberland } 53445db8440cSStefan Haberland 53455db8440cSStefan Haberland /* 5346b179b037SStefan Haberland * This function determines the scope of a reconfiguration request by 5347b179b037SStefan Haberland * analysing the path and device selection data provided in the CUIR request. 5348b179b037SStefan Haberland * Returns a path mask containing CUIR affected paths for the give device. 5349b179b037SStefan Haberland * 5350b179b037SStefan Haberland * If the CUIR request does not contain the required information return the 5351b179b037SStefan Haberland * path mask of the path the attention message for the CUIR request was reveived 5352b179b037SStefan Haberland * on. 5353b179b037SStefan Haberland */ 5354b179b037SStefan Haberland static int dasd_eckd_cuir_scope(struct dasd_device *device, __u8 lpum, 5355b179b037SStefan Haberland struct dasd_cuir_message *cuir) 5356b179b037SStefan Haberland { 5357b179b037SStefan Haberland struct dasd_conf_data *ref_conf_data; 5358b179b037SStefan Haberland unsigned long bitmask = 0, mask = 0; 5359b179b037SStefan Haberland struct dasd_conf_data *conf_data; 5360b179b037SStefan Haberland unsigned int pos, path; 5361b179b037SStefan Haberland char *ref_gneq, *gneq; 5362b179b037SStefan Haberland char *ref_ned, *ned; 5363b179b037SStefan Haberland int tbcpm = 0; 5364b179b037SStefan Haberland 5365b179b037SStefan Haberland /* if CUIR request does not specify the scope use the path 5366b179b037SStefan Haberland the attention message was presented on */ 5367b179b037SStefan Haberland if (!cuir->ned_map || 5368b179b037SStefan Haberland !(cuir->neq_map[0] | cuir->neq_map[1] | cuir->neq_map[2])) 5369b179b037SStefan Haberland return lpum; 5370b179b037SStefan Haberland 5371b179b037SStefan Haberland /* get reference conf data */ 5372b179b037SStefan Haberland ref_conf_data = dasd_eckd_get_ref_conf(device, lpum, cuir); 5373b179b037SStefan Haberland /* reference ned is determined by ned_map field */ 5374b179b037SStefan Haberland pos = 8 - ffs(cuir->ned_map); 5375b179b037SStefan Haberland ref_ned = (char *)&ref_conf_data->neds[pos]; 5376b179b037SStefan Haberland ref_gneq = (char *)&ref_conf_data->gneq; 5377b179b037SStefan Haberland /* transfer 24 bit neq_map to mask */ 5378b179b037SStefan Haberland mask = cuir->neq_map[2]; 5379b179b037SStefan Haberland mask |= cuir->neq_map[1] << 8; 5380b179b037SStefan Haberland mask |= cuir->neq_map[0] << 16; 5381b179b037SStefan Haberland 5382c9346151SStefan Haberland for (path = 0; path < 8; path++) { 5383b179b037SStefan Haberland /* initialise data per path */ 5384b179b037SStefan Haberland bitmask = mask; 5385c9346151SStefan Haberland conf_data = device->path[path].conf_data; 5386b179b037SStefan Haberland pos = 8 - ffs(cuir->ned_map); 5387b179b037SStefan Haberland ned = (char *) &conf_data->neds[pos]; 5388b179b037SStefan Haberland /* compare reference ned and per path ned */ 5389b179b037SStefan Haberland if (memcmp(ref_ned, ned, sizeof(*ned)) != 0) 5390b179b037SStefan Haberland continue; 5391b179b037SStefan Haberland gneq = (char *)&conf_data->gneq; 5392b179b037SStefan Haberland /* compare reference gneq and per_path gneq under 5393b179b037SStefan Haberland 24 bit mask where mask bit 0 equals byte 7 of 5394b179b037SStefan Haberland the gneq and mask bit 24 equals byte 31 */ 5395b179b037SStefan Haberland while (bitmask) { 5396b179b037SStefan Haberland pos = ffs(bitmask) - 1; 5397b179b037SStefan Haberland if (memcmp(&ref_gneq[31 - pos], &gneq[31 - pos], 1) 5398b179b037SStefan Haberland != 0) 5399b179b037SStefan Haberland break; 5400b179b037SStefan Haberland clear_bit(pos, &bitmask); 5401b179b037SStefan Haberland } 5402b179b037SStefan Haberland if (bitmask) 5403b179b037SStefan Haberland continue; 5404b179b037SStefan Haberland /* device and path match the reference values 5405b179b037SStefan Haberland add path to CUIR scope */ 5406c9346151SStefan Haberland tbcpm |= 0x80 >> path; 5407b179b037SStefan Haberland } 5408b179b037SStefan Haberland return tbcpm; 5409b179b037SStefan Haberland } 5410b179b037SStefan Haberland 5411b179b037SStefan Haberland static void dasd_eckd_cuir_notify_user(struct dasd_device *device, 5412a521b048SStefan Haberland unsigned long paths, int action) 5413b179b037SStefan Haberland { 5414b179b037SStefan Haberland int pos; 5415b179b037SStefan Haberland 5416b179b037SStefan Haberland while (paths) { 5417b179b037SStefan Haberland /* get position of bit in mask */ 5418a521b048SStefan Haberland pos = 8 - ffs(paths); 5419b179b037SStefan Haberland /* get channel path descriptor from this position */ 5420b179b037SStefan Haberland if (action == CUIR_QUIESCE) 5421a521b048SStefan Haberland pr_warn("Service on the storage server caused path %x.%02x to go offline", 5422a521b048SStefan Haberland device->path[pos].cssid, 5423a521b048SStefan Haberland device->path[pos].chpid); 5424b179b037SStefan Haberland else if (action == CUIR_RESUME) 5425a521b048SStefan Haberland pr_info("Path %x.%02x is back online after service on the storage server", 5426a521b048SStefan Haberland device->path[pos].cssid, 5427a521b048SStefan Haberland device->path[pos].chpid); 5428a521b048SStefan Haberland clear_bit(7 - pos, &paths); 5429b179b037SStefan Haberland } 5430b179b037SStefan Haberland } 5431b179b037SStefan Haberland 5432b179b037SStefan Haberland static int dasd_eckd_cuir_remove_path(struct dasd_device *device, __u8 lpum, 5433b179b037SStefan Haberland struct dasd_cuir_message *cuir) 5434b179b037SStefan Haberland { 5435b179b037SStefan Haberland unsigned long tbcpm; 5436b179b037SStefan Haberland 5437b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(device, lpum, cuir); 5438b179b037SStefan Haberland /* nothing to do if path is not in use */ 5439c9346151SStefan Haberland if (!(dasd_path_get_opm(device) & tbcpm)) 5440b179b037SStefan Haberland return 0; 5441c9346151SStefan Haberland if (!(dasd_path_get_opm(device) & ~tbcpm)) { 5442b179b037SStefan Haberland /* no path would be left if the CUIR action is taken 5443b179b037SStefan Haberland return error */ 5444b179b037SStefan Haberland return -EINVAL; 5445b179b037SStefan Haberland } 5446b179b037SStefan Haberland /* remove device from operational path mask */ 5447c9346151SStefan Haberland dasd_path_remove_opm(device, tbcpm); 5448c9346151SStefan Haberland dasd_path_add_cuirpm(device, tbcpm); 5449b179b037SStefan Haberland return tbcpm; 5450b179b037SStefan Haberland } 5451b179b037SStefan Haberland 5452b179b037SStefan Haberland /* 5453b179b037SStefan Haberland * walk through all devices and build a path mask to quiesce them 5454b179b037SStefan Haberland * return an error if the last path to a device would be removed 54555db8440cSStefan Haberland * 54565db8440cSStefan Haberland * if only part of the devices are quiesced and an error 54575db8440cSStefan Haberland * occurs no onlining necessary, the storage server will 54585db8440cSStefan Haberland * notify the already set offline devices again 54595db8440cSStefan Haberland */ 54605db8440cSStefan Haberland static int dasd_eckd_cuir_quiesce(struct dasd_device *device, __u8 lpum, 5461b179b037SStefan Haberland struct dasd_cuir_message *cuir) 54625db8440cSStefan Haberland { 5463543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 54645db8440cSStefan Haberland struct alias_pav_group *pavgroup, *tempgroup; 54655db8440cSStefan Haberland struct dasd_device *dev, *n; 5466b179b037SStefan Haberland unsigned long paths = 0; 5467b179b037SStefan Haberland unsigned long flags; 5468b179b037SStefan Haberland int tbcpm; 54695db8440cSStefan Haberland 54705db8440cSStefan Haberland /* active devices */ 5471b179b037SStefan Haberland list_for_each_entry_safe(dev, n, &private->lcu->active_devices, 54725db8440cSStefan Haberland alias_list) { 5473b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 5474b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 5475b179b037SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); 5476b179b037SStefan Haberland if (tbcpm < 0) 5477b179b037SStefan Haberland goto out_err; 5478b179b037SStefan Haberland paths |= tbcpm; 54795db8440cSStefan Haberland } 54805db8440cSStefan Haberland /* inactive devices */ 5481b179b037SStefan Haberland list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices, 54825db8440cSStefan Haberland alias_list) { 5483b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 5484b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 5485b179b037SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); 5486b179b037SStefan Haberland if (tbcpm < 0) 5487b179b037SStefan Haberland goto out_err; 5488b179b037SStefan Haberland paths |= tbcpm; 54895db8440cSStefan Haberland } 54905db8440cSStefan Haberland /* devices in PAV groups */ 54915db8440cSStefan Haberland list_for_each_entry_safe(pavgroup, tempgroup, 54925db8440cSStefan Haberland &private->lcu->grouplist, group) { 54935db8440cSStefan Haberland list_for_each_entry_safe(dev, n, &pavgroup->baselist, 54945db8440cSStefan Haberland alias_list) { 5495b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 5496b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 5497b179b037SStefan Haberland spin_unlock_irqrestore( 5498b179b037SStefan Haberland get_ccwdev_lock(dev->cdev), flags); 5499b179b037SStefan Haberland if (tbcpm < 0) 5500b179b037SStefan Haberland goto out_err; 5501b179b037SStefan Haberland paths |= tbcpm; 55025db8440cSStefan Haberland } 55035db8440cSStefan Haberland list_for_each_entry_safe(dev, n, &pavgroup->aliaslist, 55045db8440cSStefan Haberland alias_list) { 5505b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 5506b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 5507b179b037SStefan Haberland spin_unlock_irqrestore( 5508b179b037SStefan Haberland get_ccwdev_lock(dev->cdev), flags); 5509b179b037SStefan Haberland if (tbcpm < 0) 5510b179b037SStefan Haberland goto out_err; 5511b179b037SStefan Haberland paths |= tbcpm; 55125db8440cSStefan Haberland } 55135db8440cSStefan Haberland } 5514b179b037SStefan Haberland /* notify user about all paths affected by CUIR action */ 5515a521b048SStefan Haberland dasd_eckd_cuir_notify_user(device, paths, CUIR_QUIESCE); 5516b179b037SStefan Haberland return 0; 5517b179b037SStefan Haberland out_err: 5518b179b037SStefan Haberland return tbcpm; 55195db8440cSStefan Haberland } 55205db8440cSStefan Haberland 55215db8440cSStefan Haberland static int dasd_eckd_cuir_resume(struct dasd_device *device, __u8 lpum, 5522b179b037SStefan Haberland struct dasd_cuir_message *cuir) 55235db8440cSStefan Haberland { 5524543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 55255db8440cSStefan Haberland struct alias_pav_group *pavgroup, *tempgroup; 55265db8440cSStefan Haberland struct dasd_device *dev, *n; 5527b179b037SStefan Haberland unsigned long paths = 0; 5528b179b037SStefan Haberland int tbcpm; 55295db8440cSStefan Haberland 55305db8440cSStefan Haberland /* 55315db8440cSStefan Haberland * the path may have been added through a generic path event before 55325db8440cSStefan Haberland * only trigger path verification if the path is not already in use 55335db8440cSStefan Haberland */ 55345db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 55355db8440cSStefan Haberland &private->lcu->active_devices, 55365db8440cSStefan Haberland alias_list) { 5537b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 5538b179b037SStefan Haberland paths |= tbcpm; 5539c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 5540c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 55415db8440cSStefan Haberland dasd_schedule_device_bh(dev); 55425db8440cSStefan Haberland } 55435db8440cSStefan Haberland } 55445db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 55455db8440cSStefan Haberland &private->lcu->inactive_devices, 55465db8440cSStefan Haberland alias_list) { 5547b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 5548b179b037SStefan Haberland paths |= tbcpm; 5549c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 5550c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 55515db8440cSStefan Haberland dasd_schedule_device_bh(dev); 55525db8440cSStefan Haberland } 55535db8440cSStefan Haberland } 55545db8440cSStefan Haberland /* devices in PAV groups */ 55555db8440cSStefan Haberland list_for_each_entry_safe(pavgroup, tempgroup, 55565db8440cSStefan Haberland &private->lcu->grouplist, 55575db8440cSStefan Haberland group) { 55585db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 55595db8440cSStefan Haberland &pavgroup->baselist, 55605db8440cSStefan Haberland alias_list) { 5561b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 5562b179b037SStefan Haberland paths |= tbcpm; 5563c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 5564c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 55655db8440cSStefan Haberland dasd_schedule_device_bh(dev); 55665db8440cSStefan Haberland } 55675db8440cSStefan Haberland } 55685db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 55695db8440cSStefan Haberland &pavgroup->aliaslist, 55705db8440cSStefan Haberland alias_list) { 5571b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 5572b179b037SStefan Haberland paths |= tbcpm; 5573c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 5574c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 55755db8440cSStefan Haberland dasd_schedule_device_bh(dev); 55765db8440cSStefan Haberland } 55775db8440cSStefan Haberland } 55785db8440cSStefan Haberland } 5579b179b037SStefan Haberland /* notify user about all paths affected by CUIR action */ 5580a521b048SStefan Haberland dasd_eckd_cuir_notify_user(device, paths, CUIR_RESUME); 5581b179b037SStefan Haberland return 0; 55825db8440cSStefan Haberland } 55835db8440cSStefan Haberland 55845db8440cSStefan Haberland static void dasd_eckd_handle_cuir(struct dasd_device *device, void *messages, 55855db8440cSStefan Haberland __u8 lpum) 55865db8440cSStefan Haberland { 55875db8440cSStefan Haberland struct dasd_cuir_message *cuir = messages; 5588a521b048SStefan Haberland int response; 55895db8440cSStefan Haberland 5590b179b037SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, 5591b179b037SStefan Haberland "CUIR request: %016llx %016llx %016llx %08x", 5592b179b037SStefan Haberland ((u64 *)cuir)[0], ((u64 *)cuir)[1], ((u64 *)cuir)[2], 5593b179b037SStefan Haberland ((u32 *)cuir)[3]); 55945db8440cSStefan Haberland 55955db8440cSStefan Haberland if (cuir->code == CUIR_QUIESCE) { 55965db8440cSStefan Haberland /* quiesce */ 5597a521b048SStefan Haberland if (dasd_eckd_cuir_quiesce(device, lpum, cuir)) 5598b179b037SStefan Haberland response = PSF_CUIR_LAST_PATH; 5599b179b037SStefan Haberland else 5600b179b037SStefan Haberland response = PSF_CUIR_COMPLETED; 56015db8440cSStefan Haberland } else if (cuir->code == CUIR_RESUME) { 56025db8440cSStefan Haberland /* resume */ 5603a521b048SStefan Haberland dasd_eckd_cuir_resume(device, lpum, cuir); 5604b179b037SStefan Haberland response = PSF_CUIR_COMPLETED; 56055db8440cSStefan Haberland } else 56065db8440cSStefan Haberland response = PSF_CUIR_NOT_SUPPORTED; 56075db8440cSStefan Haberland 5608b179b037SStefan Haberland dasd_eckd_psf_cuir_response(device, response, 5609a521b048SStefan Haberland cuir->message_id, lpum); 5610b179b037SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, 5611b179b037SStefan Haberland "CUIR response: %d on message ID %08x", response, 5612b179b037SStefan Haberland cuir->message_id); 5613b179b037SStefan Haberland /* to make sure there is no attention left schedule work again */ 5614b179b037SStefan Haberland device->discipline->check_attention(device, lpum); 56155db8440cSStefan Haberland } 56165db8440cSStefan Haberland 56175db8440cSStefan Haberland static void dasd_eckd_check_attention_work(struct work_struct *work) 56185db8440cSStefan Haberland { 56195db8440cSStefan Haberland struct check_attention_work_data *data; 56205db8440cSStefan Haberland struct dasd_rssd_messages *messages; 56215db8440cSStefan Haberland struct dasd_device *device; 56225db8440cSStefan Haberland int rc; 56235db8440cSStefan Haberland 56245db8440cSStefan Haberland data = container_of(work, struct check_attention_work_data, worker); 56255db8440cSStefan Haberland device = data->device; 56265db8440cSStefan Haberland messages = kzalloc(sizeof(*messages), GFP_KERNEL); 56275db8440cSStefan Haberland if (!messages) { 56285db8440cSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 56295db8440cSStefan Haberland "Could not allocate attention message buffer"); 56305db8440cSStefan Haberland goto out; 56315db8440cSStefan Haberland } 56325db8440cSStefan Haberland rc = dasd_eckd_read_message_buffer(device, messages, data->lpum); 56335db8440cSStefan Haberland if (rc) 56345db8440cSStefan Haberland goto out; 56355db8440cSStefan Haberland if (messages->length == ATTENTION_LENGTH_CUIR && 56365db8440cSStefan Haberland messages->format == ATTENTION_FORMAT_CUIR) 56375db8440cSStefan Haberland dasd_eckd_handle_cuir(device, messages, data->lpum); 56385db8440cSStefan Haberland out: 56395db8440cSStefan Haberland dasd_put_device(device); 56405db8440cSStefan Haberland kfree(messages); 56415db8440cSStefan Haberland kfree(data); 56425db8440cSStefan Haberland } 56435db8440cSStefan Haberland 56445db8440cSStefan Haberland static int dasd_eckd_check_attention(struct dasd_device *device, __u8 lpum) 56455db8440cSStefan Haberland { 56465db8440cSStefan Haberland struct check_attention_work_data *data; 56475db8440cSStefan Haberland 56485db8440cSStefan Haberland data = kzalloc(sizeof(*data), GFP_ATOMIC); 56495db8440cSStefan Haberland if (!data) 56505db8440cSStefan Haberland return -ENOMEM; 56515db8440cSStefan Haberland INIT_WORK(&data->worker, dasd_eckd_check_attention_work); 56525db8440cSStefan Haberland dasd_get_device(device); 56535db8440cSStefan Haberland data->device = device; 56545db8440cSStefan Haberland data->lpum = lpum; 56555db8440cSStefan Haberland schedule_work(&data->worker); 56565db8440cSStefan Haberland return 0; 56575db8440cSStefan Haberland } 56585db8440cSStefan Haberland 5659a521b048SStefan Haberland static int dasd_eckd_disable_hpf_path(struct dasd_device *device, __u8 lpum) 5660a521b048SStefan Haberland { 5661a521b048SStefan Haberland if (~lpum & dasd_path_get_opm(device)) { 5662a521b048SStefan Haberland dasd_path_add_nohpfpm(device, lpum); 5663a521b048SStefan Haberland dasd_path_remove_opm(device, lpum); 5664a521b048SStefan Haberland dev_err(&device->cdev->dev, 5665a521b048SStefan Haberland "Channel path %02X lost HPF functionality and is disabled\n", 5666a521b048SStefan Haberland lpum); 5667a521b048SStefan Haberland return 1; 5668a521b048SStefan Haberland } 5669a521b048SStefan Haberland return 0; 5670a521b048SStefan Haberland } 5671a521b048SStefan Haberland 5672a521b048SStefan Haberland static void dasd_eckd_disable_hpf_device(struct dasd_device *device) 5673a521b048SStefan Haberland { 5674a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 5675a521b048SStefan Haberland 5676a521b048SStefan Haberland dev_err(&device->cdev->dev, 5677a521b048SStefan Haberland "High Performance FICON disabled\n"); 5678a521b048SStefan Haberland private->fcx_max_data = 0; 5679a521b048SStefan Haberland } 5680a521b048SStefan Haberland 5681a521b048SStefan Haberland static int dasd_eckd_hpf_enabled(struct dasd_device *device) 5682a521b048SStefan Haberland { 5683a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 5684a521b048SStefan Haberland 5685a521b048SStefan Haberland return private->fcx_max_data ? 1 : 0; 5686a521b048SStefan Haberland } 5687a521b048SStefan Haberland 5688a521b048SStefan Haberland static void dasd_eckd_handle_hpf_error(struct dasd_device *device, 5689a521b048SStefan Haberland struct irb *irb) 5690a521b048SStefan Haberland { 5691a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 5692a521b048SStefan Haberland 5693a521b048SStefan Haberland if (!private->fcx_max_data) { 5694a521b048SStefan Haberland /* sanity check for no HPF, the error makes no sense */ 5695a521b048SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 5696a521b048SStefan Haberland "Trying to disable HPF for a non HPF device"); 5697a521b048SStefan Haberland return; 5698a521b048SStefan Haberland } 5699a521b048SStefan Haberland if (irb->scsw.tm.sesq == SCSW_SESQ_DEV_NOFCX) { 5700a521b048SStefan Haberland dasd_eckd_disable_hpf_device(device); 5701a521b048SStefan Haberland } else if (irb->scsw.tm.sesq == SCSW_SESQ_PATH_NOFCX) { 5702a521b048SStefan Haberland if (dasd_eckd_disable_hpf_path(device, irb->esw.esw1.lpum)) 5703a521b048SStefan Haberland return; 5704a521b048SStefan Haberland dasd_eckd_disable_hpf_device(device); 5705a521b048SStefan Haberland dasd_path_set_tbvpm(device, 5706a521b048SStefan Haberland dasd_path_get_hpfpm(device)); 5707a521b048SStefan Haberland } 5708a521b048SStefan Haberland /* 5709a521b048SStefan Haberland * prevent that any new I/O ist started on the device and schedule a 5710a521b048SStefan Haberland * requeue of existing requests 5711a521b048SStefan Haberland */ 5712a521b048SStefan Haberland dasd_device_set_stop_bits(device, DASD_STOPPED_NOT_ACC); 5713a521b048SStefan Haberland dasd_schedule_requeue(device); 5714a521b048SStefan Haberland } 5715a521b048SStefan Haberland 5716d41dd122SStefan Haberland static struct ccw_driver dasd_eckd_driver = { 57173bda058bSSebastian Ott .driver = { 5718d41dd122SStefan Haberland .name = "dasd-eckd", 5719d41dd122SStefan Haberland .owner = THIS_MODULE, 57203bda058bSSebastian Ott }, 5721d41dd122SStefan Haberland .ids = dasd_eckd_ids, 5722d41dd122SStefan Haberland .probe = dasd_eckd_probe, 5723d41dd122SStefan Haberland .remove = dasd_generic_remove, 5724d41dd122SStefan Haberland .set_offline = dasd_generic_set_offline, 5725d41dd122SStefan Haberland .set_online = dasd_eckd_set_online, 5726d41dd122SStefan Haberland .notify = dasd_generic_notify, 5727a4d26c6aSStefan Weinhuber .path_event = dasd_generic_path_event, 57284679e893SStefan Haberland .shutdown = dasd_generic_shutdown, 5729d41dd122SStefan Haberland .freeze = dasd_generic_pm_freeze, 5730d41dd122SStefan Haberland .thaw = dasd_generic_restore_device, 5731d41dd122SStefan Haberland .restore = dasd_generic_restore_device, 5732a23ed009SStefan Haberland .uc_handler = dasd_generic_uc_handler, 5733420f42ecSHeiko Carstens .int_class = IRQIO_DAS, 5734d41dd122SStefan Haberland }; 5735f3eb5384SStefan Weinhuber 57361da177e4SLinus Torvalds /* 57371da177e4SLinus Torvalds * max_blocks is dependent on the amount of storage that is available 57381da177e4SLinus Torvalds * in the static io buffer for each device. Currently each device has 57391da177e4SLinus Torvalds * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has 57401da177e4SLinus Torvalds * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use 57411da177e4SLinus Torvalds * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In 57421da177e4SLinus Torvalds * addition we have one define extent ccw + 16 bytes of data and one 57431da177e4SLinus Torvalds * locate record ccw + 16 bytes of data. That makes: 57441da177e4SLinus Torvalds * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. 57451da177e4SLinus Torvalds * We want to fit two into the available memory so that we can immediately 57461da177e4SLinus Torvalds * start the next request if one finishes off. That makes 249.5 blocks 57471da177e4SLinus Torvalds * for one request. Give a little safety and the result is 240. 57481da177e4SLinus Torvalds */ 57491da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline = { 57501da177e4SLinus Torvalds .owner = THIS_MODULE, 57511da177e4SLinus Torvalds .name = "ECKD", 57521da177e4SLinus Torvalds .ebcname = "ECKD", 5753ef19298bSStefan Weinhuber .max_blocks = 190, 57541da177e4SLinus Torvalds .check_device = dasd_eckd_check_characteristics, 57558e09f215SStefan Weinhuber .uncheck_device = dasd_eckd_uncheck_device, 57561da177e4SLinus Torvalds .do_analysis = dasd_eckd_do_analysis, 5757a4d26c6aSStefan Weinhuber .verify_path = dasd_eckd_verify_path, 5758d42e1712SStefan Haberland .basic_to_ready = dasd_eckd_basic_to_ready, 57598e09f215SStefan Weinhuber .online_to_ready = dasd_eckd_online_to_ready, 5760daa991bfSStefan Haberland .basic_to_known = dasd_eckd_basic_to_known, 57611da177e4SLinus Torvalds .fill_geometry = dasd_eckd_fill_geometry, 57621da177e4SLinus Torvalds .start_IO = dasd_start_IO, 57631da177e4SLinus Torvalds .term_IO = dasd_term_IO, 57648e09f215SStefan Weinhuber .handle_terminated_request = dasd_eckd_handle_terminated_request, 57651da177e4SLinus Torvalds .format_device = dasd_eckd_format_device, 57668fd57520SJan Höppner .check_device_format = dasd_eckd_check_device_format, 57671da177e4SLinus Torvalds .erp_action = dasd_eckd_erp_action, 57681da177e4SLinus Torvalds .erp_postaction = dasd_eckd_erp_postaction, 57695a27e60dSStefan Weinhuber .check_for_device_change = dasd_eckd_check_for_device_change, 57708e09f215SStefan Weinhuber .build_cp = dasd_eckd_build_alias_cp, 57718e09f215SStefan Weinhuber .free_cp = dasd_eckd_free_alias_cp, 57721da177e4SLinus Torvalds .dump_sense = dasd_eckd_dump_sense, 5773fc19f381SStefan Haberland .dump_sense_dbf = dasd_eckd_dump_sense_dbf, 57741da177e4SLinus Torvalds .fill_info = dasd_eckd_fill_info, 57751107ccfbSChristoph Hellwig .ioctl = dasd_eckd_ioctl, 5776d41dd122SStefan Haberland .freeze = dasd_eckd_pm_freeze, 5777d41dd122SStefan Haberland .restore = dasd_eckd_restore_device, 5778501183f2SStefan Haberland .reload = dasd_eckd_reload_device, 57792dedf0d9SStefan Haberland .get_uid = dasd_eckd_get_uid, 5780f1633031SStefan Haberland .kick_validate = dasd_eckd_kick_validate_server, 57815db8440cSStefan Haberland .check_attention = dasd_eckd_check_attention, 57825a3b7b11SStefan Haberland .host_access_count = dasd_eckd_host_access_count, 57835a3b7b11SStefan Haberland .hosts_print = dasd_hosts_print, 5784a521b048SStefan Haberland .handle_hpf_error = dasd_eckd_handle_hpf_error, 5785a521b048SStefan Haberland .disable_hpf = dasd_eckd_disable_hpf_device, 5786a521b048SStefan Haberland .hpf_enabled = dasd_eckd_hpf_enabled, 5787a521b048SStefan Haberland .reset_path = dasd_eckd_reset_path, 57881da177e4SLinus Torvalds }; 57891da177e4SLinus Torvalds 57901da177e4SLinus Torvalds static int __init 57911da177e4SLinus Torvalds dasd_eckd_init(void) 57921da177e4SLinus Torvalds { 5793736e6ea0SSebastian Ott int ret; 5794736e6ea0SSebastian Ott 57951da177e4SLinus Torvalds ASCEBC(dasd_eckd_discipline.ebcname, 4); 5796f932bceaSStefan Weinhuber dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), 5797f932bceaSStefan Weinhuber GFP_KERNEL | GFP_DMA); 5798f932bceaSStefan Weinhuber if (!dasd_reserve_req) 5799f932bceaSStefan Weinhuber return -ENOMEM; 5800a4d26c6aSStefan Weinhuber path_verification_worker = kmalloc(sizeof(*path_verification_worker), 5801a4d26c6aSStefan Weinhuber GFP_KERNEL | GFP_DMA); 5802a4d26c6aSStefan Weinhuber if (!path_verification_worker) { 5803a4d26c6aSStefan Weinhuber kfree(dasd_reserve_req); 5804a4d26c6aSStefan Weinhuber return -ENOMEM; 5805a4d26c6aSStefan Weinhuber } 5806558b9ef0SStefan Weinhuber rawpadpage = (void *)__get_free_page(GFP_KERNEL); 5807558b9ef0SStefan Weinhuber if (!rawpadpage) { 5808558b9ef0SStefan Weinhuber kfree(path_verification_worker); 5809558b9ef0SStefan Weinhuber kfree(dasd_reserve_req); 5810558b9ef0SStefan Weinhuber return -ENOMEM; 5811558b9ef0SStefan Weinhuber } 5812736e6ea0SSebastian Ott ret = ccw_driver_register(&dasd_eckd_driver); 5813736e6ea0SSebastian Ott if (!ret) 5814736e6ea0SSebastian Ott wait_for_device_probe(); 5815a4d26c6aSStefan Weinhuber else { 5816a4d26c6aSStefan Weinhuber kfree(path_verification_worker); 5817f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 5818558b9ef0SStefan Weinhuber free_page((unsigned long)rawpadpage); 5819a4d26c6aSStefan Weinhuber } 5820736e6ea0SSebastian Ott return ret; 58211da177e4SLinus Torvalds } 58221da177e4SLinus Torvalds 58231da177e4SLinus Torvalds static void __exit 58241da177e4SLinus Torvalds dasd_eckd_cleanup(void) 58251da177e4SLinus Torvalds { 58261da177e4SLinus Torvalds ccw_driver_unregister(&dasd_eckd_driver); 5827a4d26c6aSStefan Weinhuber kfree(path_verification_worker); 5828f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 5829558b9ef0SStefan Weinhuber free_page((unsigned long)rawpadpage); 58301da177e4SLinus Torvalds } 58311da177e4SLinus Torvalds 58321da177e4SLinus Torvalds module_init(dasd_eckd_init); 58331da177e4SLinus Torvalds module_exit(dasd_eckd_cleanup); 5834