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 111c729696bSJan Höppner static int dasd_eckd_ext_pool_id(struct dasd_device *); 1128fd57520SJan Höppner static int prepare_itcw(struct itcw *, unsigned int, unsigned int, int, 1138fd57520SJan Höppner struct dasd_device *, struct dasd_device *, 1148fd57520SJan Höppner unsigned int, int, unsigned int, unsigned int, 1158fd57520SJan Höppner unsigned int, unsigned int); 1168fd57520SJan Höppner 1171da177e4SLinus Torvalds /* initial attempt at a probe function. this can be simplified once 1181da177e4SLinus Torvalds * the other detection code is gone */ 1191da177e4SLinus Torvalds static int 1201da177e4SLinus Torvalds dasd_eckd_probe (struct ccw_device *cdev) 1211da177e4SLinus Torvalds { 1221da177e4SLinus Torvalds int ret; 1231da177e4SLinus Torvalds 12440545573SHorst Hummel /* set ECKD specific ccw-device options */ 125454e1fa1SPeter Oberparleiter ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE | 126454e1fa1SPeter Oberparleiter CCWDEV_DO_PATHGROUP | CCWDEV_DO_MULTIPATH); 12740545573SHorst Hummel if (ret) { 128b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s", 129b8ed5dd5SStefan Haberland "dasd_eckd_probe: could not set " 130b8ed5dd5SStefan Haberland "ccw-device options"); 1311da177e4SLinus Torvalds return ret; 13240545573SHorst Hummel } 13340545573SHorst Hummel ret = dasd_generic_probe(cdev, &dasd_eckd_discipline); 13440545573SHorst Hummel return ret; 1351da177e4SLinus Torvalds } 1361da177e4SLinus Torvalds 1371da177e4SLinus Torvalds static int 1381da177e4SLinus Torvalds dasd_eckd_set_online(struct ccw_device *cdev) 1391da177e4SLinus Torvalds { 1401da177e4SLinus Torvalds return dasd_generic_set_online(cdev, &dasd_eckd_discipline); 1411da177e4SLinus Torvalds } 1421da177e4SLinus Torvalds 1431da177e4SLinus Torvalds static const int sizes_trk0[] = { 28, 148, 84 }; 1441da177e4SLinus Torvalds #define LABEL_SIZE 140 1451da177e4SLinus Torvalds 1463bc9fef9SStefan Haberland /* head and record addresses of count_area read in analysis ccw */ 147ce6915f5SJan Höppner static const int count_area_head[] = { 0, 0, 0, 0, 1 }; 1483bc9fef9SStefan Haberland static const int count_area_rec[] = { 1, 2, 3, 4, 1 }; 1493bc9fef9SStefan Haberland 1501da177e4SLinus Torvalds static inline unsigned int 1511da177e4SLinus Torvalds ceil_quot(unsigned int d1, unsigned int d2) 1521da177e4SLinus Torvalds { 1531da177e4SLinus Torvalds return (d1 + (d2 - 1)) / d2; 1541da177e4SLinus Torvalds } 1551da177e4SLinus Torvalds 1564d284cacSHeiko Carstens static unsigned int 1571da177e4SLinus Torvalds recs_per_track(struct dasd_eckd_characteristics * rdc, 1581da177e4SLinus Torvalds unsigned int kl, unsigned int dl) 1591da177e4SLinus Torvalds { 1601da177e4SLinus Torvalds int dn, kn; 1611da177e4SLinus Torvalds 1621da177e4SLinus Torvalds switch (rdc->dev_type) { 1631da177e4SLinus Torvalds case 0x3380: 1641da177e4SLinus Torvalds if (kl) 1651da177e4SLinus Torvalds return 1499 / (15 + 7 + ceil_quot(kl + 12, 32) + 1661da177e4SLinus Torvalds ceil_quot(dl + 12, 32)); 1671da177e4SLinus Torvalds else 1681da177e4SLinus Torvalds return 1499 / (15 + ceil_quot(dl + 12, 32)); 1691da177e4SLinus Torvalds case 0x3390: 1701da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1711da177e4SLinus Torvalds if (kl) { 1721da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1731da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(kl + 6 * kn, 34) + 1741da177e4SLinus Torvalds 9 + ceil_quot(dl + 6 * dn, 34)); 1751da177e4SLinus Torvalds } else 1761da177e4SLinus Torvalds return 1729 / (10 + 9 + ceil_quot(dl + 6 * dn, 34)); 1771da177e4SLinus Torvalds case 0x9345: 1781da177e4SLinus Torvalds dn = ceil_quot(dl + 6, 232) + 1; 1791da177e4SLinus Torvalds if (kl) { 1801da177e4SLinus Torvalds kn = ceil_quot(kl + 6, 232) + 1; 1811da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(kl + 6 * kn, 34) + 1821da177e4SLinus Torvalds ceil_quot(dl + 6 * dn, 34)); 1831da177e4SLinus Torvalds } else 1841da177e4SLinus Torvalds return 1420 / (18 + 7 + ceil_quot(dl + 6 * dn, 34)); 1851da177e4SLinus Torvalds } 1861da177e4SLinus Torvalds return 0; 1871da177e4SLinus Torvalds } 1881da177e4SLinus Torvalds 189b44b0ab3SStefan Weinhuber static void set_ch_t(struct ch_t *geo, __u32 cyl, __u8 head) 190b44b0ab3SStefan Weinhuber { 191b44b0ab3SStefan Weinhuber geo->cyl = (__u16) cyl; 192b44b0ab3SStefan Weinhuber geo->head = cyl >> 16; 193b44b0ab3SStefan Weinhuber geo->head <<= 4; 194b44b0ab3SStefan Weinhuber geo->head |= head; 195b44b0ab3SStefan Weinhuber } 196b44b0ab3SStefan Weinhuber 1975628683cSStefan Haberland static int set_timestamp(struct ccw1 *ccw, struct DE_eckd_data *data, 1981da177e4SLinus Torvalds struct dasd_device *device) 1991da177e4SLinus Torvalds { 200543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 201d54853efSMartin Schwidefsky int rc; 2021da177e4SLinus Torvalds 2035628683cSStefan Haberland rc = get_phys_clock(&data->ep_sys_time); 2045628683cSStefan Haberland /* 2055628683cSStefan Haberland * Ignore return code if XRC is not supported or 2065628683cSStefan Haberland * sync clock is switched off 2075628683cSStefan Haberland */ 2085628683cSStefan Haberland if ((rc && !private->rdc_data.facilities.XRC_supported) || 2095628683cSStefan Haberland rc == -EOPNOTSUPP || rc == -EACCES) 210d54853efSMartin Schwidefsky return 0; 2111da177e4SLinus Torvalds 2121da177e4SLinus Torvalds /* switch on System Time Stamp - needed for XRC Support */ 2131da177e4SLinus Torvalds data->ga_extended |= 0x08; /* switch on 'Time Stamp Valid' */ 2141da177e4SLinus Torvalds data->ga_extended |= 0x02; /* switch on 'Extended Parameter' */ 2151da177e4SLinus Torvalds 21645f186beSJan Höppner if (ccw) { 21745f186beSJan Höppner ccw->count = sizeof(struct DE_eckd_data); 21845f186beSJan Höppner ccw->flags |= CCW_FLAG_SLI; 21945f186beSJan Höppner } 22045f186beSJan Höppner 221d54853efSMartin Schwidefsky return rc; 2221da177e4SLinus Torvalds } 2231da177e4SLinus Torvalds 2244d284cacSHeiko Carstens static int 225b44b0ab3SStefan Weinhuber define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk, 22645f186beSJan Höppner unsigned int totrk, int cmd, struct dasd_device *device, 22745f186beSJan Höppner int blksize) 2281da177e4SLinus Torvalds { 229543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 230b44b0ab3SStefan Weinhuber u16 heads, beghead, endhead; 23145f186beSJan Höppner u32 begcyl, endcyl; 232d54853efSMartin Schwidefsky int rc = 0; 2331da177e4SLinus Torvalds 23445f186beSJan Höppner if (ccw) { 2351da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT; 2361da177e4SLinus Torvalds ccw->flags = 0; 2371da177e4SLinus Torvalds ccw->count = 16; 2381da177e4SLinus Torvalds ccw->cda = (__u32)__pa(data); 23945f186beSJan Höppner } 2401da177e4SLinus Torvalds 2411da177e4SLinus Torvalds memset(data, 0, sizeof(struct DE_eckd_data)); 2421da177e4SLinus Torvalds switch (cmd) { 2431da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 2441da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 2451da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 2461da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 2471da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 2481da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 2491da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 2501da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 2511da177e4SLinus Torvalds data->mask.perm = 0x1; 2521da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 2531da177e4SLinus Torvalds break; 2548fd57520SJan Höppner case DASD_ECKD_CCW_READ_COUNT: 2558fd57520SJan Höppner data->mask.perm = 0x1; 2568fd57520SJan Höppner data->attributes.operation = DASD_BYPASS_CACHE; 2578fd57520SJan Höppner break; 25845f186beSJan Höppner case DASD_ECKD_CCW_READ_TRACK: 25945f186beSJan Höppner case DASD_ECKD_CCW_READ_TRACK_DATA: 26045f186beSJan Höppner data->mask.perm = 0x1; 26145f186beSJan Höppner data->attributes.operation = private->attrib.operation; 26245f186beSJan Höppner data->blk_size = 0; 26345f186beSJan Höppner break; 2641da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 2651da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 2661da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 2671da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 2681da177e4SLinus Torvalds data->mask.perm = 0x02; 2691da177e4SLinus Torvalds data->attributes.operation = private->attrib.operation; 2705628683cSStefan Haberland rc = set_timestamp(ccw, data, device); 2711da177e4SLinus Torvalds break; 2721da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 2731da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 2741da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 2755628683cSStefan Haberland rc = set_timestamp(ccw, data, device); 2761da177e4SLinus Torvalds break; 2771da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 2781da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 2791da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 2801da177e4SLinus Torvalds data->mask.perm = 0x3; 2811da177e4SLinus Torvalds data->mask.auth = 0x1; 2821da177e4SLinus Torvalds data->attributes.operation = DASD_BYPASS_CACHE; 2835628683cSStefan Haberland rc = set_timestamp(ccw, data, device); 2841da177e4SLinus Torvalds break; 28545f186beSJan Höppner case DASD_ECKD_CCW_WRITE_FULL_TRACK: 28645f186beSJan Höppner data->mask.perm = 0x03; 28745f186beSJan Höppner data->attributes.operation = private->attrib.operation; 28845f186beSJan Höppner data->blk_size = 0; 28945f186beSJan Höppner break; 29045f186beSJan Höppner case DASD_ECKD_CCW_WRITE_TRACK_DATA: 29145f186beSJan Höppner data->mask.perm = 0x02; 29245f186beSJan Höppner data->attributes.operation = private->attrib.operation; 29345f186beSJan Höppner data->blk_size = blksize; 2945628683cSStefan Haberland rc = set_timestamp(ccw, data, device); 29545f186beSJan Höppner break; 2961da177e4SLinus Torvalds default: 297fc19f381SStefan Haberland dev_err(&device->cdev->dev, 298fc19f381SStefan Haberland "0x%x is not a known command\n", cmd); 2991da177e4SLinus Torvalds break; 3001da177e4SLinus Torvalds } 3011da177e4SLinus Torvalds 3021da177e4SLinus Torvalds data->attributes.mode = 0x3; /* ECKD */ 3031da177e4SLinus Torvalds 3041da177e4SLinus Torvalds if ((private->rdc_data.cu_type == 0x2105 || 3051da177e4SLinus Torvalds private->rdc_data.cu_type == 0x2107 || 3061da177e4SLinus Torvalds private->rdc_data.cu_type == 0x1750) 3071da177e4SLinus Torvalds && !(private->uses_cdl && trk < 2)) 3081da177e4SLinus Torvalds data->ga_extended |= 0x40; /* Regular Data Format Mode */ 3091da177e4SLinus Torvalds 310b44b0ab3SStefan Weinhuber heads = private->rdc_data.trk_per_cyl; 311b44b0ab3SStefan Weinhuber begcyl = trk / heads; 312b44b0ab3SStefan Weinhuber beghead = trk % heads; 313b44b0ab3SStefan Weinhuber endcyl = totrk / heads; 314b44b0ab3SStefan Weinhuber endhead = totrk % heads; 3151da177e4SLinus Torvalds 3161da177e4SLinus Torvalds /* check for sequential prestage - enhance cylinder range */ 3171da177e4SLinus Torvalds if (data->attributes.operation == DASD_SEQ_PRESTAGE || 3181da177e4SLinus Torvalds data->attributes.operation == DASD_SEQ_ACCESS) { 3191da177e4SLinus Torvalds 320b44b0ab3SStefan Weinhuber if (endcyl + private->attrib.nr_cyl < private->real_cyl) 321b44b0ab3SStefan Weinhuber endcyl += private->attrib.nr_cyl; 3221da177e4SLinus Torvalds else 323b44b0ab3SStefan Weinhuber endcyl = (private->real_cyl - 1); 3241da177e4SLinus Torvalds } 3251da177e4SLinus Torvalds 326b44b0ab3SStefan Weinhuber set_ch_t(&data->beg_ext, begcyl, beghead); 327b44b0ab3SStefan Weinhuber set_ch_t(&data->end_ext, endcyl, endhead); 328d54853efSMartin Schwidefsky return rc; 3291da177e4SLinus Torvalds } 3301da177e4SLinus Torvalds 3318e09f215SStefan Weinhuber 33245f186beSJan Höppner static void locate_record_ext(struct ccw1 *ccw, struct LRE_eckd_data *data, 33345f186beSJan Höppner unsigned int trk, unsigned int rec_on_trk, 33445f186beSJan Höppner int count, int cmd, struct dasd_device *device, 33545f186beSJan Höppner unsigned int reclen, unsigned int tlf) 336f3eb5384SStefan Weinhuber { 337543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 338f3eb5384SStefan Weinhuber int sector; 339f3eb5384SStefan Weinhuber int dn, d; 340f3eb5384SStefan Weinhuber 34145f186beSJan Höppner if (ccw) { 34245f186beSJan Höppner ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD_EXT; 34345f186beSJan Höppner ccw->flags = 0; 34445f186beSJan Höppner if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) 34545f186beSJan Höppner ccw->count = 22; 34645f186beSJan Höppner else 34745f186beSJan Höppner ccw->count = 20; 34845f186beSJan Höppner ccw->cda = (__u32)__pa(data); 34945f186beSJan Höppner } 35045f186beSJan Höppner 351f3eb5384SStefan Weinhuber memset(data, 0, sizeof(*data)); 352f3eb5384SStefan Weinhuber sector = 0; 353f3eb5384SStefan Weinhuber if (rec_on_trk) { 354f3eb5384SStefan Weinhuber switch (private->rdc_data.dev_type) { 355f3eb5384SStefan Weinhuber case 0x3390: 356f3eb5384SStefan Weinhuber dn = ceil_quot(reclen + 6, 232); 357f3eb5384SStefan Weinhuber d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 358f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 359f3eb5384SStefan Weinhuber break; 360f3eb5384SStefan Weinhuber case 0x3380: 361f3eb5384SStefan Weinhuber d = 7 + ceil_quot(reclen + 12, 32); 362f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 363f3eb5384SStefan Weinhuber break; 364f3eb5384SStefan Weinhuber } 365f3eb5384SStefan Weinhuber } 366f3eb5384SStefan Weinhuber data->sector = sector; 367f3eb5384SStefan Weinhuber /* note: meaning of count depends on the operation 368f3eb5384SStefan Weinhuber * for record based I/O it's the number of records, but for 369f3eb5384SStefan Weinhuber * track based I/O it's the number of tracks 370f3eb5384SStefan Weinhuber */ 371f3eb5384SStefan Weinhuber data->count = count; 372f3eb5384SStefan Weinhuber switch (cmd) { 373f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 374f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 375f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 376f3eb5384SStefan Weinhuber break; 377f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_HOME_ADDRESS: 378f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 379f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 380f3eb5384SStefan Weinhuber break; 381f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 382f3eb5384SStefan Weinhuber data->operation.orientation = 0x1; 383f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 384f3eb5384SStefan Weinhuber data->count++; 385f3eb5384SStefan Weinhuber break; 386f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_RECORD_ZERO: 387f3eb5384SStefan Weinhuber data->operation.orientation = 0x3; 388f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 389f3eb5384SStefan Weinhuber data->count++; 390f3eb5384SStefan Weinhuber break; 391f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE: 392f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_MT: 393f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD: 394f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_KD_MT: 395f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 396f3eb5384SStefan Weinhuber data->length = reclen; 397f3eb5384SStefan Weinhuber data->operation.operation = 0x01; 398f3eb5384SStefan Weinhuber break; 399f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD: 400f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_CKD_MT: 401f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 402f3eb5384SStefan Weinhuber data->length = reclen; 403f3eb5384SStefan Weinhuber data->operation.operation = 0x03; 404f3eb5384SStefan Weinhuber break; 405e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_WRITE_FULL_TRACK: 406e4dbb0f2SStefan Haberland data->operation.orientation = 0x0; 407e4dbb0f2SStefan Haberland data->operation.operation = 0x3F; 408e4dbb0f2SStefan Haberland data->extended_operation = 0x11; 409e4dbb0f2SStefan Haberland data->length = 0; 410e4dbb0f2SStefan Haberland data->extended_parameter_length = 0x02; 411e4dbb0f2SStefan Haberland if (data->count > 8) { 412e4dbb0f2SStefan Haberland data->extended_parameter[0] = 0xFF; 413e4dbb0f2SStefan Haberland data->extended_parameter[1] = 0xFF; 414e4dbb0f2SStefan Haberland data->extended_parameter[1] <<= (16 - count); 415e4dbb0f2SStefan Haberland } else { 416e4dbb0f2SStefan Haberland data->extended_parameter[0] = 0xFF; 417e4dbb0f2SStefan Haberland data->extended_parameter[0] <<= (8 - count); 418e4dbb0f2SStefan Haberland data->extended_parameter[1] = 0x00; 419e4dbb0f2SStefan Haberland } 420e4dbb0f2SStefan Haberland data->sector = 0xFF; 421e4dbb0f2SStefan Haberland break; 422f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 423f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 424f3eb5384SStefan Weinhuber data->length = reclen; /* not tlf, as one might think */ 425f3eb5384SStefan Weinhuber data->operation.operation = 0x3F; 426f3eb5384SStefan Weinhuber data->extended_operation = 0x23; 427f3eb5384SStefan Weinhuber break; 428f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ: 429f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_MT: 430f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_KD: 431f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_KD_MT: 432f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 433f3eb5384SStefan Weinhuber data->length = reclen; 434f3eb5384SStefan Weinhuber data->operation.operation = 0x06; 435f3eb5384SStefan Weinhuber break; 436f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD: 437f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_CKD_MT: 438f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 439f3eb5384SStefan Weinhuber data->length = reclen; 440f3eb5384SStefan Weinhuber data->operation.operation = 0x16; 441f3eb5384SStefan Weinhuber break; 442f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_COUNT: 443f3eb5384SStefan Weinhuber data->operation.operation = 0x06; 444f3eb5384SStefan Weinhuber break; 445e4dbb0f2SStefan Haberland case DASD_ECKD_CCW_READ_TRACK: 446e4dbb0f2SStefan Haberland data->operation.orientation = 0x1; 447e4dbb0f2SStefan Haberland data->operation.operation = 0x0C; 448e4dbb0f2SStefan Haberland data->extended_parameter_length = 0; 449e4dbb0f2SStefan Haberland data->sector = 0xFF; 450e4dbb0f2SStefan Haberland break; 451f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 452f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 453f3eb5384SStefan Weinhuber data->length = tlf; 454f3eb5384SStefan Weinhuber data->operation.operation = 0x0C; 455f3eb5384SStefan Weinhuber break; 456f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_ERASE: 457f3eb5384SStefan Weinhuber data->length = reclen; 458f3eb5384SStefan Weinhuber data->auxiliary.length_valid = 0x1; 459f3eb5384SStefan Weinhuber data->operation.operation = 0x0b; 460f3eb5384SStefan Weinhuber break; 461f3eb5384SStefan Weinhuber default: 462f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, device, 463f3eb5384SStefan Weinhuber "fill LRE unknown opcode 0x%x", cmd); 464f3eb5384SStefan Weinhuber BUG(); 465f3eb5384SStefan Weinhuber } 466f3eb5384SStefan Weinhuber set_ch_t(&data->seek_addr, 467f3eb5384SStefan Weinhuber trk / private->rdc_data.trk_per_cyl, 468f3eb5384SStefan Weinhuber trk % private->rdc_data.trk_per_cyl); 469f3eb5384SStefan Weinhuber data->search_arg.cyl = data->seek_addr.cyl; 470f3eb5384SStefan Weinhuber data->search_arg.head = data->seek_addr.head; 471f3eb5384SStefan Weinhuber data->search_arg.record = rec_on_trk; 472f3eb5384SStefan Weinhuber } 473f3eb5384SStefan Weinhuber 474f3eb5384SStefan Weinhuber static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 475b44b0ab3SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 476f3eb5384SStefan Weinhuber struct dasd_device *basedev, struct dasd_device *startdev, 47745f186beSJan Höppner unsigned int format, unsigned int rec_on_trk, int count, 478f3eb5384SStefan Weinhuber unsigned int blksize, unsigned int tlf) 4798e09f215SStefan Weinhuber { 4808e09f215SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 481f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 48245f186beSJan Höppner struct DE_eckd_data *dedata; 4838e09f215SStefan Weinhuber int rc = 0; 4848e09f215SStefan Weinhuber 485543691a4SSebastian Ott basepriv = basedev->private; 486543691a4SSebastian Ott startpriv = startdev->private; 487f3eb5384SStefan Weinhuber dedata = &pfxdata->define_extent; 488f3eb5384SStefan Weinhuber lredata = &pfxdata->locate_record; 4898e09f215SStefan Weinhuber 4908e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PFX; 4918e09f215SStefan Weinhuber ccw->flags = 0; 492e4dbb0f2SStefan Haberland if (cmd == DASD_ECKD_CCW_WRITE_FULL_TRACK) { 493e4dbb0f2SStefan Haberland ccw->count = sizeof(*pfxdata) + 2; 494e4dbb0f2SStefan Haberland ccw->cda = (__u32) __pa(pfxdata); 495e4dbb0f2SStefan Haberland memset(pfxdata, 0, sizeof(*pfxdata) + 2); 496e4dbb0f2SStefan Haberland } else { 4978e09f215SStefan Weinhuber ccw->count = sizeof(*pfxdata); 4988e09f215SStefan Weinhuber ccw->cda = (__u32) __pa(pfxdata); 4998e09f215SStefan Weinhuber memset(pfxdata, 0, sizeof(*pfxdata)); 500e4dbb0f2SStefan Haberland } 501e4dbb0f2SStefan Haberland 5028e09f215SStefan Weinhuber /* prefix data */ 503f3eb5384SStefan Weinhuber if (format > 1) { 504f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 505f3eb5384SStefan Weinhuber "PFX LRE unknown format 0x%x", format); 506f3eb5384SStefan Weinhuber BUG(); 507f3eb5384SStefan Weinhuber return -EINVAL; 508f3eb5384SStefan Weinhuber } 509f3eb5384SStefan Weinhuber pfxdata->format = format; 5104abb08c2SStefan Weinhuber pfxdata->base_address = basepriv->ned->unit_addr; 5114abb08c2SStefan Weinhuber pfxdata->base_lss = basepriv->ned->ID; 512f3eb5384SStefan Weinhuber pfxdata->validity.define_extent = 1; 5138e09f215SStefan Weinhuber 5148e09f215SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 515da340f92SStefan Haberland if (startpriv->uid.type == UA_BASE_PAV_ALIAS) 5168e09f215SStefan Weinhuber pfxdata->validity.verify_base = 1; 517da340f92SStefan Haberland 518da340f92SStefan Haberland if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) { 519da340f92SStefan Haberland pfxdata->validity.verify_base = 1; 5208e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 1; 5218e09f215SStefan Weinhuber } 5228e09f215SStefan Weinhuber 52345f186beSJan Höppner rc = define_extent(NULL, dedata, trk, totrk, cmd, basedev, blksize); 5248e09f215SStefan Weinhuber 52545f186beSJan Höppner /* 52645f186beSJan Höppner * For some commands the System Time Stamp is set in the define extent 52745f186beSJan Höppner * data when XRC is supported. The validity of the time stamp must be 52845f186beSJan Höppner * reflected in the prefix data as well. 52945f186beSJan Höppner */ 53045f186beSJan Höppner if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02) 53145f186beSJan Höppner pfxdata->validity.time_stamp = 1; /* 'Time Stamp Valid' */ 532f3eb5384SStefan Weinhuber 533f3eb5384SStefan Weinhuber if (format == 1) { 53445f186beSJan Höppner locate_record_ext(NULL, lredata, trk, rec_on_trk, count, cmd, 535f3eb5384SStefan Weinhuber basedev, blksize, tlf); 536f3eb5384SStefan Weinhuber } 537f3eb5384SStefan Weinhuber 5388e09f215SStefan Weinhuber return rc; 5398e09f215SStefan Weinhuber } 5408e09f215SStefan Weinhuber 541f3eb5384SStefan Weinhuber static int prefix(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata, 542f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 543f3eb5384SStefan Weinhuber struct dasd_device *basedev, struct dasd_device *startdev) 544f3eb5384SStefan Weinhuber { 545f3eb5384SStefan Weinhuber return prefix_LRE(ccw, pfxdata, trk, totrk, cmd, basedev, startdev, 546f3eb5384SStefan Weinhuber 0, 0, 0, 0, 0); 547f3eb5384SStefan Weinhuber } 548f3eb5384SStefan Weinhuber 5494d284cacSHeiko Carstens static void 550b44b0ab3SStefan Weinhuber locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk, 551b44b0ab3SStefan Weinhuber unsigned int rec_on_trk, int no_rec, int cmd, 5521da177e4SLinus Torvalds struct dasd_device * device, int reclen) 5531da177e4SLinus Torvalds { 554543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 5551da177e4SLinus Torvalds int sector; 5561da177e4SLinus Torvalds int dn, d; 5571da177e4SLinus Torvalds 5581da177e4SLinus Torvalds DBF_DEV_EVENT(DBF_INFO, device, 5591da177e4SLinus Torvalds "Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d", 5601da177e4SLinus Torvalds trk, rec_on_trk, no_rec, cmd, reclen); 5611da177e4SLinus Torvalds 5621da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_LOCATE_RECORD; 5631da177e4SLinus Torvalds ccw->flags = 0; 5641da177e4SLinus Torvalds ccw->count = 16; 5651da177e4SLinus Torvalds ccw->cda = (__u32) __pa(data); 5661da177e4SLinus Torvalds 5671da177e4SLinus Torvalds memset(data, 0, sizeof(struct LO_eckd_data)); 5681da177e4SLinus Torvalds sector = 0; 5691da177e4SLinus Torvalds if (rec_on_trk) { 5701da177e4SLinus Torvalds switch (private->rdc_data.dev_type) { 5711da177e4SLinus Torvalds case 0x3390: 5721da177e4SLinus Torvalds dn = ceil_quot(reclen + 6, 232); 5731da177e4SLinus Torvalds d = 9 + ceil_quot(reclen + 6 * (dn + 1), 34); 5741da177e4SLinus Torvalds sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 5751da177e4SLinus Torvalds break; 5761da177e4SLinus Torvalds case 0x3380: 5771da177e4SLinus Torvalds d = 7 + ceil_quot(reclen + 12, 32); 5781da177e4SLinus Torvalds sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 5791da177e4SLinus Torvalds break; 5801da177e4SLinus Torvalds } 5811da177e4SLinus Torvalds } 5821da177e4SLinus Torvalds data->sector = sector; 5831da177e4SLinus Torvalds data->count = no_rec; 5841da177e4SLinus Torvalds switch (cmd) { 5851da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_HOME_ADDRESS: 5861da177e4SLinus Torvalds data->operation.orientation = 0x3; 5871da177e4SLinus Torvalds data->operation.operation = 0x03; 5881da177e4SLinus Torvalds break; 5891da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_HOME_ADDRESS: 5901da177e4SLinus Torvalds data->operation.orientation = 0x3; 5911da177e4SLinus Torvalds data->operation.operation = 0x16; 5921da177e4SLinus Torvalds break; 5931da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_RECORD_ZERO: 5941da177e4SLinus Torvalds data->operation.orientation = 0x1; 5951da177e4SLinus Torvalds data->operation.operation = 0x03; 5961da177e4SLinus Torvalds data->count++; 5971da177e4SLinus Torvalds break; 5981da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_RECORD_ZERO: 5991da177e4SLinus Torvalds data->operation.orientation = 0x3; 6001da177e4SLinus Torvalds data->operation.operation = 0x16; 6011da177e4SLinus Torvalds data->count++; 6021da177e4SLinus Torvalds break; 6031da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE: 6041da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_MT: 6051da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD: 6061da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_KD_MT: 6071da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6081da177e4SLinus Torvalds data->length = reclen; 6091da177e4SLinus Torvalds data->operation.operation = 0x01; 6101da177e4SLinus Torvalds break; 6111da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD: 6121da177e4SLinus Torvalds case DASD_ECKD_CCW_WRITE_CKD_MT: 6131da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6141da177e4SLinus Torvalds data->length = reclen; 6151da177e4SLinus Torvalds data->operation.operation = 0x03; 6161da177e4SLinus Torvalds break; 6171da177e4SLinus Torvalds case DASD_ECKD_CCW_READ: 6181da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_MT: 6191da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD: 6201da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_KD_MT: 6211da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6221da177e4SLinus Torvalds data->length = reclen; 6231da177e4SLinus Torvalds data->operation.operation = 0x06; 6241da177e4SLinus Torvalds break; 6251da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD: 6261da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_CKD_MT: 6271da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6281da177e4SLinus Torvalds data->length = reclen; 6291da177e4SLinus Torvalds data->operation.operation = 0x16; 6301da177e4SLinus Torvalds break; 6311da177e4SLinus Torvalds case DASD_ECKD_CCW_READ_COUNT: 6321da177e4SLinus Torvalds data->operation.operation = 0x06; 6331da177e4SLinus Torvalds break; 6341da177e4SLinus Torvalds case DASD_ECKD_CCW_ERASE: 6351da177e4SLinus Torvalds data->length = reclen; 6361da177e4SLinus Torvalds data->auxiliary.last_bytes_used = 0x1; 6371da177e4SLinus Torvalds data->operation.operation = 0x0b; 6381da177e4SLinus Torvalds break; 6391da177e4SLinus Torvalds default: 640fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_ERR, device, "unknown locate record " 641fc19f381SStefan Haberland "opcode 0x%x", cmd); 6421da177e4SLinus Torvalds } 643b44b0ab3SStefan Weinhuber set_ch_t(&data->seek_addr, 644b44b0ab3SStefan Weinhuber trk / private->rdc_data.trk_per_cyl, 645b44b0ab3SStefan Weinhuber trk % private->rdc_data.trk_per_cyl); 646b44b0ab3SStefan Weinhuber data->search_arg.cyl = data->seek_addr.cyl; 647b44b0ab3SStefan Weinhuber data->search_arg.head = data->seek_addr.head; 6481da177e4SLinus Torvalds data->search_arg.record = rec_on_trk; 6491da177e4SLinus Torvalds } 6501da177e4SLinus Torvalds 6511da177e4SLinus Torvalds /* 6521da177e4SLinus Torvalds * Returns 1 if the block is one of the special blocks that needs 6531da177e4SLinus Torvalds * to get read/written with the KD variant of the command. 6541da177e4SLinus Torvalds * That is DASD_ECKD_READ_KD_MT instead of DASD_ECKD_READ_MT and 6551da177e4SLinus Torvalds * DASD_ECKD_WRITE_KD_MT instead of DASD_ECKD_WRITE_MT. 6561da177e4SLinus Torvalds * Luckily the KD variants differ only by one bit (0x08) from the 6571da177e4SLinus Torvalds * normal variant. So don't wonder about code like: 6581da177e4SLinus Torvalds * if (dasd_eckd_cdl_special(blk_per_trk, recid)) 6591da177e4SLinus Torvalds * ccw->cmd_code |= 0x8; 6601da177e4SLinus Torvalds */ 6611da177e4SLinus Torvalds static inline int 6621da177e4SLinus Torvalds dasd_eckd_cdl_special(int blk_per_trk, int recid) 6631da177e4SLinus Torvalds { 6641da177e4SLinus Torvalds if (recid < 3) 6651da177e4SLinus Torvalds return 1; 6661da177e4SLinus Torvalds if (recid < blk_per_trk) 6671da177e4SLinus Torvalds return 0; 6681da177e4SLinus Torvalds if (recid < 2 * blk_per_trk) 6691da177e4SLinus Torvalds return 1; 6701da177e4SLinus Torvalds return 0; 6711da177e4SLinus Torvalds } 6721da177e4SLinus Torvalds 6731da177e4SLinus Torvalds /* 6741da177e4SLinus Torvalds * Returns the record size for the special blocks of the cdl format. 6751da177e4SLinus Torvalds * Only returns something useful if dasd_eckd_cdl_special is true 6761da177e4SLinus Torvalds * for the recid. 6771da177e4SLinus Torvalds */ 6781da177e4SLinus Torvalds static inline int 6791da177e4SLinus Torvalds dasd_eckd_cdl_reclen(int recid) 6801da177e4SLinus Torvalds { 6811da177e4SLinus Torvalds if (recid < 3) 6821da177e4SLinus Torvalds return sizes_trk0[recid]; 6831da177e4SLinus Torvalds return LABEL_SIZE; 6841da177e4SLinus Torvalds } 685b206181dSStefan Haberland /* create unique id from private structure. */ 686b206181dSStefan Haberland static void create_uid(struct dasd_eckd_private *private) 6873d052595SHorst Hummel { 6884abb08c2SStefan Weinhuber int count; 689b206181dSStefan Haberland struct dasd_uid *uid; 6903d052595SHorst Hummel 6912dedf0d9SStefan Haberland uid = &private->uid; 6923d052595SHorst Hummel memset(uid, 0, sizeof(struct dasd_uid)); 6934abb08c2SStefan Weinhuber memcpy(uid->vendor, private->ned->HDA_manufacturer, 6943d052595SHorst Hummel sizeof(uid->vendor) - 1); 6953d052595SHorst Hummel EBCASC(uid->vendor, sizeof(uid->vendor) - 1); 6964abb08c2SStefan Weinhuber memcpy(uid->serial, private->ned->HDA_location, 6973d052595SHorst Hummel sizeof(uid->serial) - 1); 6983d052595SHorst Hummel EBCASC(uid->serial, sizeof(uid->serial) - 1); 6994abb08c2SStefan Weinhuber uid->ssid = private->gneq->subsystemID; 700a419aef8SJoe Perches uid->real_unit_addr = private->ned->unit_addr; 7014abb08c2SStefan Weinhuber if (private->sneq) { 7024abb08c2SStefan Weinhuber uid->type = private->sneq->sua_flags; 7038e09f215SStefan Weinhuber if (uid->type == UA_BASE_PAV_ALIAS) 7044abb08c2SStefan Weinhuber uid->base_unit_addr = private->sneq->base_unit_addr; 7058e09f215SStefan Weinhuber } else { 7068e09f215SStefan Weinhuber uid->type = UA_BASE_DEVICE; 7078e09f215SStefan Weinhuber } 7084abb08c2SStefan Weinhuber if (private->vdsneq) { 7094abb08c2SStefan Weinhuber for (count = 0; count < 16; count++) { 7104abb08c2SStefan Weinhuber sprintf(uid->vduit+2*count, "%02x", 7114abb08c2SStefan Weinhuber private->vdsneq->uit[count]); 7124abb08c2SStefan Weinhuber } 7134abb08c2SStefan Weinhuber } 714b206181dSStefan Haberland } 715b206181dSStefan Haberland 716b206181dSStefan Haberland /* 717b206181dSStefan Haberland * Generate device unique id that specifies the physical device. 718b206181dSStefan Haberland */ 719b206181dSStefan Haberland static int dasd_eckd_generate_uid(struct dasd_device *device) 720b206181dSStefan Haberland { 721543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 722b206181dSStefan Haberland unsigned long flags; 723b206181dSStefan Haberland 724b206181dSStefan Haberland if (!private) 725b206181dSStefan Haberland return -ENODEV; 726b206181dSStefan Haberland if (!private->ned || !private->gneq) 727b206181dSStefan Haberland return -ENODEV; 728b206181dSStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 729b206181dSStefan Haberland create_uid(private); 7302dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 7313d052595SHorst Hummel return 0; 7323d052595SHorst Hummel } 7333d052595SHorst Hummel 7342dedf0d9SStefan Haberland static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid) 7352dedf0d9SStefan Haberland { 736543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 7372dedf0d9SStefan Haberland unsigned long flags; 7382dedf0d9SStefan Haberland 739543691a4SSebastian Ott if (private) { 7402dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 7412dedf0d9SStefan Haberland *uid = private->uid; 7422dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 7432dedf0d9SStefan Haberland return 0; 7442dedf0d9SStefan Haberland } 7452dedf0d9SStefan Haberland return -EINVAL; 7462dedf0d9SStefan Haberland } 7472dedf0d9SStefan Haberland 748b206181dSStefan Haberland /* 749b206181dSStefan Haberland * compare device UID with data of a given dasd_eckd_private structure 750b206181dSStefan Haberland * return 0 for match 751b206181dSStefan Haberland */ 752b206181dSStefan Haberland static int dasd_eckd_compare_path_uid(struct dasd_device *device, 753b206181dSStefan Haberland struct dasd_eckd_private *private) 754b206181dSStefan Haberland { 755b206181dSStefan Haberland struct dasd_uid device_uid; 756b206181dSStefan Haberland 757b206181dSStefan Haberland create_uid(private); 758b206181dSStefan Haberland dasd_eckd_get_uid(device, &device_uid); 759b206181dSStefan Haberland 760b206181dSStefan Haberland return memcmp(&device_uid, &private->uid, sizeof(struct dasd_uid)); 761b206181dSStefan Haberland } 762b206181dSStefan Haberland 763a4d26c6aSStefan Weinhuber static void dasd_eckd_fill_rcd_cqr(struct dasd_device *device, 764a4d26c6aSStefan Weinhuber struct dasd_ccw_req *cqr, 765a4d26c6aSStefan Weinhuber __u8 *rcd_buffer, 766a4d26c6aSStefan Weinhuber __u8 lpm) 76717283b56SCornelia Huck { 76817283b56SCornelia Huck struct ccw1 *ccw; 769a4d26c6aSStefan Weinhuber /* 770a4d26c6aSStefan Weinhuber * buffer has to start with EBCDIC "V1.0" to show 771a4d26c6aSStefan Weinhuber * support for virtual device SNEQ 772a4d26c6aSStefan Weinhuber */ 773a4d26c6aSStefan Weinhuber rcd_buffer[0] = 0xE5; 774a4d26c6aSStefan Weinhuber rcd_buffer[1] = 0xF1; 775a4d26c6aSStefan Weinhuber rcd_buffer[2] = 0x4B; 776a4d26c6aSStefan Weinhuber rcd_buffer[3] = 0xF0; 77717283b56SCornelia Huck 77817283b56SCornelia Huck ccw = cqr->cpaddr; 779a4d26c6aSStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RCD; 780a4d26c6aSStefan Weinhuber ccw->flags = 0; 78117283b56SCornelia Huck ccw->cda = (__u32)(addr_t)rcd_buffer; 782a4d26c6aSStefan Weinhuber ccw->count = DASD_ECKD_RCD_DATA_SIZE; 783a4d26c6aSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 78417283b56SCornelia Huck 7858e09f215SStefan Weinhuber cqr->startdev = device; 7868e09f215SStefan Weinhuber cqr->memdev = device; 7878e09f215SStefan Weinhuber cqr->block = NULL; 78817283b56SCornelia Huck cqr->expires = 10*HZ; 78917283b56SCornelia Huck cqr->lpm = lpm; 790eb6e199bSStefan Weinhuber cqr->retries = 256; 7911aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 79217283b56SCornelia Huck cqr->status = DASD_CQR_FILLED; 793a4d26c6aSStefan Weinhuber set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 794a4d26c6aSStefan Weinhuber } 795a4d26c6aSStefan Weinhuber 7965915a873SStefan Haberland /* 7975915a873SStefan Haberland * Wakeup helper for read_conf 7985915a873SStefan Haberland * if the cqr is not done and needs some error recovery 7995915a873SStefan Haberland * the buffer has to be re-initialized with the EBCDIC "V1.0" 8005915a873SStefan Haberland * to show support for virtual device SNEQ 8015915a873SStefan Haberland */ 8025915a873SStefan Haberland static void read_conf_cb(struct dasd_ccw_req *cqr, void *data) 8035915a873SStefan Haberland { 8045915a873SStefan Haberland struct ccw1 *ccw; 8055915a873SStefan Haberland __u8 *rcd_buffer; 8065915a873SStefan Haberland 8075915a873SStefan Haberland if (cqr->status != DASD_CQR_DONE) { 8085915a873SStefan Haberland ccw = cqr->cpaddr; 8095915a873SStefan Haberland rcd_buffer = (__u8 *)((addr_t) ccw->cda); 8105915a873SStefan Haberland memset(rcd_buffer, 0, sizeof(*rcd_buffer)); 8115915a873SStefan Haberland 8125915a873SStefan Haberland rcd_buffer[0] = 0xE5; 8135915a873SStefan Haberland rcd_buffer[1] = 0xF1; 8145915a873SStefan Haberland rcd_buffer[2] = 0x4B; 8155915a873SStefan Haberland rcd_buffer[3] = 0xF0; 8165915a873SStefan Haberland } 8175915a873SStefan Haberland dasd_wakeup_cb(cqr, data); 8185915a873SStefan Haberland } 8195915a873SStefan Haberland 820a4d26c6aSStefan Weinhuber static int dasd_eckd_read_conf_immediately(struct dasd_device *device, 821a4d26c6aSStefan Weinhuber struct dasd_ccw_req *cqr, 822a4d26c6aSStefan Weinhuber __u8 *rcd_buffer, 823a4d26c6aSStefan Weinhuber __u8 lpm) 824a4d26c6aSStefan Weinhuber { 825a4d26c6aSStefan Weinhuber struct ciw *ciw; 826a4d26c6aSStefan Weinhuber int rc; 827a4d26c6aSStefan Weinhuber /* 828a4d26c6aSStefan Weinhuber * sanity check: scan for RCD command in extended SenseID data 829a4d26c6aSStefan Weinhuber * some devices do not support RCD 830a4d26c6aSStefan Weinhuber */ 831a4d26c6aSStefan Weinhuber ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 832a4d26c6aSStefan Weinhuber if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) 833a4d26c6aSStefan Weinhuber return -EOPNOTSUPP; 834a4d26c6aSStefan Weinhuber 835a4d26c6aSStefan Weinhuber dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buffer, lpm); 836a4d26c6aSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 8375a27e60dSStefan Weinhuber set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 838a4d26c6aSStefan Weinhuber cqr->retries = 5; 8395915a873SStefan Haberland cqr->callback = read_conf_cb; 840a4d26c6aSStefan Weinhuber rc = dasd_sleep_on_immediatly(cqr); 841a4d26c6aSStefan Weinhuber return rc; 84217283b56SCornelia Huck } 84317283b56SCornelia Huck 84417283b56SCornelia Huck static int dasd_eckd_read_conf_lpm(struct dasd_device *device, 84517283b56SCornelia Huck void **rcd_buffer, 84617283b56SCornelia Huck int *rcd_buffer_size, __u8 lpm) 84717283b56SCornelia Huck { 84817283b56SCornelia Huck struct ciw *ciw; 84917283b56SCornelia Huck char *rcd_buf = NULL; 85017283b56SCornelia Huck int ret; 85117283b56SCornelia Huck struct dasd_ccw_req *cqr; 85217283b56SCornelia Huck 85317283b56SCornelia Huck /* 854a4d26c6aSStefan Weinhuber * sanity check: scan for RCD command in extended SenseID data 855a4d26c6aSStefan Weinhuber * some devices do not support RCD 85617283b56SCornelia Huck */ 85717283b56SCornelia Huck ciw = ccw_device_get_ciw(device->cdev, CIW_TYPE_RCD); 858a4d26c6aSStefan Weinhuber if (!ciw || ciw->cmd != DASD_ECKD_CCW_RCD) { 85917283b56SCornelia Huck ret = -EOPNOTSUPP; 86017283b56SCornelia Huck goto out_error; 86117283b56SCornelia Huck } 862a4d26c6aSStefan Weinhuber rcd_buf = kzalloc(DASD_ECKD_RCD_DATA_SIZE, GFP_KERNEL | GFP_DMA); 86317283b56SCornelia Huck if (!rcd_buf) { 86417283b56SCornelia Huck ret = -ENOMEM; 86517283b56SCornelia Huck goto out_error; 86617283b56SCornelia Huck } 867a4d26c6aSStefan Weinhuber cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* RCD */, 868a4d26c6aSStefan Weinhuber 0, /* use rcd_buf as data ara */ 869c5205f2fSSebastian Ott device, NULL); 87017283b56SCornelia Huck if (IS_ERR(cqr)) { 871a4d26c6aSStefan Weinhuber DBF_DEV_EVENT(DBF_WARNING, device, "%s", 872a4d26c6aSStefan Weinhuber "Could not allocate RCD request"); 873a4d26c6aSStefan Weinhuber ret = -ENOMEM; 87417283b56SCornelia Huck goto out_error; 87517283b56SCornelia Huck } 876a4d26c6aSStefan Weinhuber dasd_eckd_fill_rcd_cqr(device, cqr, rcd_buf, lpm); 8775915a873SStefan Haberland cqr->callback = read_conf_cb; 87817283b56SCornelia Huck ret = dasd_sleep_on(cqr); 87917283b56SCornelia Huck /* 88017283b56SCornelia Huck * on success we update the user input parms 88117283b56SCornelia Huck */ 8828e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 88317283b56SCornelia Huck if (ret) 88417283b56SCornelia Huck goto out_error; 88517283b56SCornelia Huck 886a4d26c6aSStefan Weinhuber *rcd_buffer_size = DASD_ECKD_RCD_DATA_SIZE; 88717283b56SCornelia Huck *rcd_buffer = rcd_buf; 88817283b56SCornelia Huck return 0; 88917283b56SCornelia Huck out_error: 89017283b56SCornelia Huck kfree(rcd_buf); 89117283b56SCornelia Huck *rcd_buffer = NULL; 89217283b56SCornelia Huck *rcd_buffer_size = 0; 89317283b56SCornelia Huck return ret; 89417283b56SCornelia Huck } 89517283b56SCornelia Huck 8964abb08c2SStefan Weinhuber static int dasd_eckd_identify_conf_parts(struct dasd_eckd_private *private) 8974abb08c2SStefan Weinhuber { 8984abb08c2SStefan Weinhuber 8994abb08c2SStefan Weinhuber struct dasd_sneq *sneq; 9004abb08c2SStefan Weinhuber int i, count; 9014abb08c2SStefan Weinhuber 9024abb08c2SStefan Weinhuber private->ned = NULL; 9034abb08c2SStefan Weinhuber private->sneq = NULL; 9044abb08c2SStefan Weinhuber private->vdsneq = NULL; 9054abb08c2SStefan Weinhuber private->gneq = NULL; 9064abb08c2SStefan Weinhuber count = private->conf_len / sizeof(struct dasd_sneq); 9074abb08c2SStefan Weinhuber sneq = (struct dasd_sneq *)private->conf_data; 9084abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 9094abb08c2SStefan Weinhuber if (sneq->flags.identifier == 1 && sneq->format == 1) 9104abb08c2SStefan Weinhuber private->sneq = sneq; 9114abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 1 && sneq->format == 4) 9124abb08c2SStefan Weinhuber private->vdsneq = (struct vd_sneq *)sneq; 9134abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 2) 9144abb08c2SStefan Weinhuber private->gneq = (struct dasd_gneq *)sneq; 9154abb08c2SStefan Weinhuber else if (sneq->flags.identifier == 3 && sneq->res1 == 1) 9164abb08c2SStefan Weinhuber private->ned = (struct dasd_ned *)sneq; 9174abb08c2SStefan Weinhuber sneq++; 9184abb08c2SStefan Weinhuber } 9194abb08c2SStefan Weinhuber if (!private->ned || !private->gneq) { 9204abb08c2SStefan Weinhuber private->ned = NULL; 9214abb08c2SStefan Weinhuber private->sneq = NULL; 9224abb08c2SStefan Weinhuber private->vdsneq = NULL; 9234abb08c2SStefan Weinhuber private->gneq = NULL; 9244abb08c2SStefan Weinhuber return -EINVAL; 9254abb08c2SStefan Weinhuber } 9264abb08c2SStefan Weinhuber return 0; 9274abb08c2SStefan Weinhuber 9284abb08c2SStefan Weinhuber }; 9294abb08c2SStefan Weinhuber 9304abb08c2SStefan Weinhuber static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len) 9314abb08c2SStefan Weinhuber { 9324abb08c2SStefan Weinhuber struct dasd_gneq *gneq; 9334abb08c2SStefan Weinhuber int i, count, found; 9344abb08c2SStefan Weinhuber 9354abb08c2SStefan Weinhuber count = conf_len / sizeof(*gneq); 9364abb08c2SStefan Weinhuber gneq = (struct dasd_gneq *)conf_data; 9374abb08c2SStefan Weinhuber found = 0; 9384abb08c2SStefan Weinhuber for (i = 0; i < count; ++i) { 9394abb08c2SStefan Weinhuber if (gneq->flags.identifier == 2) { 9404abb08c2SStefan Weinhuber found = 1; 9414abb08c2SStefan Weinhuber break; 9424abb08c2SStefan Weinhuber } 9434abb08c2SStefan Weinhuber gneq++; 9444abb08c2SStefan Weinhuber } 9454abb08c2SStefan Weinhuber if (found) 9464abb08c2SStefan Weinhuber return ((char *)gneq)[18] & 0x07; 9474abb08c2SStefan Weinhuber else 9484abb08c2SStefan Weinhuber return 0; 9494abb08c2SStefan Weinhuber } 9504abb08c2SStefan Weinhuber 951c7c0c9deSStefan Haberland static void dasd_eckd_clear_conf_data(struct dasd_device *device) 952c7c0c9deSStefan Haberland { 953543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 954c7c0c9deSStefan Haberland int i; 955c7c0c9deSStefan Haberland 956c7c0c9deSStefan Haberland private->conf_data = NULL; 957c7c0c9deSStefan Haberland private->conf_len = 0; 958c7c0c9deSStefan Haberland for (i = 0; i < 8; i++) { 959c9346151SStefan Haberland kfree(device->path[i].conf_data); 960c9346151SStefan Haberland device->path[i].conf_data = NULL; 961a521b048SStefan Haberland device->path[i].cssid = 0; 962a521b048SStefan Haberland device->path[i].ssid = 0; 963a521b048SStefan Haberland device->path[i].chpid = 0; 964c7c0c9deSStefan Haberland } 965c7c0c9deSStefan Haberland } 966c7c0c9deSStefan Haberland 967c7c0c9deSStefan Haberland 9684abb08c2SStefan Weinhuber static int dasd_eckd_read_conf(struct dasd_device *device) 9691da177e4SLinus Torvalds { 9701da177e4SLinus Torvalds void *conf_data; 9711da177e4SLinus Torvalds int conf_len, conf_data_saved; 972b179b037SStefan Haberland int rc, path_err, pos; 973a4d26c6aSStefan Weinhuber __u8 lpm, opm; 974b206181dSStefan Haberland struct dasd_eckd_private *private, path_private; 975b206181dSStefan Haberland struct dasd_uid *uid; 976b206181dSStefan Haberland char print_path_uid[60], print_device_uid[60]; 977ded27d8dSSebastian Ott struct channel_path_desc_fmt0 *chp_desc; 978a521b048SStefan Haberland struct subchannel_id sch_id; 9791da177e4SLinus Torvalds 980543691a4SSebastian Ott private = device->private; 981a4d26c6aSStefan Weinhuber opm = ccw_device_get_path_mask(device->cdev); 982a521b048SStefan Haberland ccw_device_get_schid(device->cdev, &sch_id); 9831da177e4SLinus Torvalds conf_data_saved = 0; 98455d3a85cSStefan Haberland path_err = 0; 9851da177e4SLinus Torvalds /* get configuration data per operational path */ 9861da177e4SLinus Torvalds for (lpm = 0x80; lpm; lpm>>= 1) { 987b206181dSStefan Haberland if (!(lpm & opm)) 988b206181dSStefan Haberland continue; 98917283b56SCornelia Huck rc = dasd_eckd_read_conf_lpm(device, &conf_data, 9901da177e4SLinus Torvalds &conf_len, lpm); 9911da177e4SLinus Torvalds if (rc && rc != -EOPNOTSUPP) { /* -EOPNOTSUPP is ok */ 992b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 9931da177e4SLinus Torvalds "Read configuration data returned " 994b8ed5dd5SStefan Haberland "error %d", rc); 9951da177e4SLinus Torvalds return rc; 9961da177e4SLinus Torvalds } 9971da177e4SLinus Torvalds if (conf_data == NULL) { 998b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 999b8ed5dd5SStefan Haberland "No configuration data " 1000b8ed5dd5SStefan Haberland "retrieved"); 1001a4d26c6aSStefan Weinhuber /* no further analysis possible */ 1002c9346151SStefan Haberland dasd_path_add_opm(device, opm); 1003d133a960SGabriel Craciunescu continue; /* no error */ 10041da177e4SLinus Torvalds } 10051da177e4SLinus Torvalds /* save first valid configuration data */ 10061da177e4SLinus Torvalds if (!conf_data_saved) { 1007c7c0c9deSStefan Haberland /* initially clear previously stored conf_data */ 1008c7c0c9deSStefan Haberland dasd_eckd_clear_conf_data(device); 10094abb08c2SStefan Weinhuber private->conf_data = conf_data; 10104abb08c2SStefan Weinhuber private->conf_len = conf_len; 10114abb08c2SStefan Weinhuber if (dasd_eckd_identify_conf_parts(private)) { 10124abb08c2SStefan Weinhuber private->conf_data = NULL; 10134abb08c2SStefan Weinhuber private->conf_len = 0; 10144abb08c2SStefan Weinhuber kfree(conf_data); 10154abb08c2SStefan Weinhuber continue; 10164abb08c2SStefan Weinhuber } 1017c7c0c9deSStefan Haberland pos = pathmask_to_pos(lpm); 1018c7c0c9deSStefan Haberland /* store per path conf_data */ 1019c9346151SStefan Haberland device->path[pos].conf_data = conf_data; 1020a521b048SStefan Haberland device->path[pos].cssid = sch_id.cssid; 1021a521b048SStefan Haberland device->path[pos].ssid = sch_id.ssid; 1022a521b048SStefan Haberland chp_desc = ccw_device_get_chp_desc(device->cdev, pos); 1023a521b048SStefan Haberland if (chp_desc) 1024a521b048SStefan Haberland device->path[pos].chpid = chp_desc->chpid; 1025a521b048SStefan Haberland kfree(chp_desc); 1026b206181dSStefan Haberland /* 1027b206181dSStefan Haberland * build device UID that other path data 1028b206181dSStefan Haberland * can be compared to it 1029b206181dSStefan Haberland */ 1030b206181dSStefan Haberland dasd_eckd_generate_uid(device); 10311da177e4SLinus Torvalds conf_data_saved++; 1032b206181dSStefan Haberland } else { 1033b206181dSStefan Haberland path_private.conf_data = conf_data; 1034b206181dSStefan Haberland path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1035b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts( 1036b206181dSStefan Haberland &path_private)) { 1037b206181dSStefan Haberland path_private.conf_data = NULL; 1038b206181dSStefan Haberland path_private.conf_len = 0; 1039b206181dSStefan Haberland kfree(conf_data); 1040b206181dSStefan Haberland continue; 1041b206181dSStefan Haberland } 1042b206181dSStefan Haberland if (dasd_eckd_compare_path_uid( 1043b206181dSStefan Haberland device, &path_private)) { 1044b206181dSStefan Haberland uid = &path_private.uid; 1045b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1046b206181dSStefan Haberland snprintf(print_path_uid, 1047b206181dSStefan Haberland sizeof(print_path_uid), 1048b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1049b206181dSStefan Haberland uid->vendor, uid->serial, 1050b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1051b206181dSStefan Haberland uid->vduit); 1052b206181dSStefan Haberland else 1053b206181dSStefan Haberland snprintf(print_path_uid, 1054b206181dSStefan Haberland sizeof(print_path_uid), 1055b206181dSStefan Haberland "%s.%s.%04x.%02x", 1056b206181dSStefan Haberland uid->vendor, uid->serial, 1057b206181dSStefan Haberland uid->ssid, 1058b206181dSStefan Haberland uid->real_unit_addr); 1059b206181dSStefan Haberland uid = &private->uid; 1060b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1061b206181dSStefan Haberland snprintf(print_device_uid, 1062b206181dSStefan Haberland sizeof(print_device_uid), 1063b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1064b206181dSStefan Haberland uid->vendor, uid->serial, 1065b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1066b206181dSStefan Haberland uid->vduit); 1067b206181dSStefan Haberland else 1068b206181dSStefan Haberland snprintf(print_device_uid, 1069b206181dSStefan Haberland sizeof(print_device_uid), 1070b206181dSStefan Haberland "%s.%s.%04x.%02x", 1071b206181dSStefan Haberland uid->vendor, uid->serial, 1072b206181dSStefan Haberland uid->ssid, 1073b206181dSStefan Haberland uid->real_unit_addr); 1074b206181dSStefan Haberland dev_err(&device->cdev->dev, 1075b206181dSStefan Haberland "Not all channel paths lead to " 1076b206181dSStefan Haberland "the same device, path %02X leads to " 1077b206181dSStefan Haberland "device %s instead of %s\n", lpm, 1078b206181dSStefan Haberland print_path_uid, print_device_uid); 107955d3a85cSStefan Haberland path_err = -EINVAL; 1080c9346151SStefan Haberland dasd_path_add_cablepm(device, lpm); 108155d3a85cSStefan Haberland continue; 1082b206181dSStefan Haberland } 1083c7c0c9deSStefan Haberland pos = pathmask_to_pos(lpm); 1084c7c0c9deSStefan Haberland /* store per path conf_data */ 1085c9346151SStefan Haberland device->path[pos].conf_data = conf_data; 1086a521b048SStefan Haberland device->path[pos].cssid = sch_id.cssid; 1087a521b048SStefan Haberland device->path[pos].ssid = sch_id.ssid; 1088a521b048SStefan Haberland chp_desc = ccw_device_get_chp_desc(device->cdev, pos); 1089a521b048SStefan Haberland if (chp_desc) 1090a521b048SStefan Haberland device->path[pos].chpid = chp_desc->chpid; 1091a521b048SStefan Haberland kfree(chp_desc); 1092b206181dSStefan Haberland path_private.conf_data = NULL; 1093b206181dSStefan Haberland path_private.conf_len = 0; 10941da177e4SLinus Torvalds } 10954abb08c2SStefan Weinhuber switch (dasd_eckd_path_access(conf_data, conf_len)) { 10961da177e4SLinus Torvalds case 0x02: 1097c9346151SStefan Haberland dasd_path_add_nppm(device, lpm); 10981da177e4SLinus Torvalds break; 10991da177e4SLinus Torvalds case 0x03: 1100c9346151SStefan Haberland dasd_path_add_ppm(device, lpm); 11011da177e4SLinus Torvalds break; 11021da177e4SLinus Torvalds } 1103c9346151SStefan Haberland if (!dasd_path_get_opm(device)) { 1104c9346151SStefan Haberland dasd_path_set_opm(device, lpm); 1105ccc0e7dcSStefan Haberland dasd_generic_path_operational(device); 1106ccc0e7dcSStefan Haberland } else { 1107c9346151SStefan Haberland dasd_path_add_opm(device, lpm); 1108ccc0e7dcSStefan Haberland } 11091da177e4SLinus Torvalds } 1110b206181dSStefan Haberland 111155d3a85cSStefan Haberland return path_err; 11121da177e4SLinus Torvalds } 11131da177e4SLinus Torvalds 1114a521b048SStefan Haberland static u32 get_fcx_max_data(struct dasd_device *device) 1115a521b048SStefan Haberland { 1116a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 1117a521b048SStefan Haberland int fcx_in_css, fcx_in_gneq, fcx_in_features; 1118a521b048SStefan Haberland int tpm, mdc; 1119a521b048SStefan Haberland 1120a521b048SStefan Haberland if (dasd_nofcx) 1121a521b048SStefan Haberland return 0; 1122a521b048SStefan Haberland /* is transport mode supported? */ 1123a521b048SStefan Haberland fcx_in_css = css_general_characteristics.fcx; 1124a521b048SStefan Haberland fcx_in_gneq = private->gneq->reserved2[7] & 0x04; 1125a521b048SStefan Haberland fcx_in_features = private->features.feature[40] & 0x80; 1126a521b048SStefan Haberland tpm = fcx_in_css && fcx_in_gneq && fcx_in_features; 1127a521b048SStefan Haberland 1128a521b048SStefan Haberland if (!tpm) 1129a521b048SStefan Haberland return 0; 1130a521b048SStefan Haberland 1131a521b048SStefan Haberland mdc = ccw_device_get_mdc(device->cdev, 0); 1132a521b048SStefan Haberland if (mdc < 0) { 1133a521b048SStefan Haberland dev_warn(&device->cdev->dev, "Detecting the maximum supported data size for zHPF requests failed\n"); 1134a521b048SStefan Haberland return 0; 1135a521b048SStefan Haberland } else { 1136a521b048SStefan Haberland return (u32)mdc * FCX_MAX_DATA_FACTOR; 1137a521b048SStefan Haberland } 1138a521b048SStefan Haberland } 1139a521b048SStefan Haberland 1140a4d26c6aSStefan Weinhuber static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm) 1141a4d26c6aSStefan Weinhuber { 1142543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1143a4d26c6aSStefan Weinhuber int mdc; 1144a4d26c6aSStefan Weinhuber u32 fcx_max_data; 1145a4d26c6aSStefan Weinhuber 1146a4d26c6aSStefan Weinhuber if (private->fcx_max_data) { 1147a4d26c6aSStefan Weinhuber mdc = ccw_device_get_mdc(device->cdev, lpm); 1148a4d26c6aSStefan Weinhuber if ((mdc < 0)) { 1149a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1150a4d26c6aSStefan Weinhuber "Detecting the maximum data size for zHPF " 1151a4d26c6aSStefan Weinhuber "requests failed (rc=%d) for a new path %x\n", 1152a4d26c6aSStefan Weinhuber mdc, lpm); 1153a4d26c6aSStefan Weinhuber return mdc; 1154a4d26c6aSStefan Weinhuber } 11550f02c4e7SChristian Borntraeger fcx_max_data = (u32)mdc * FCX_MAX_DATA_FACTOR; 1156a4d26c6aSStefan Weinhuber if (fcx_max_data < private->fcx_max_data) { 1157a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1158a4d26c6aSStefan Weinhuber "The maximum data size for zHPF requests %u " 1159a4d26c6aSStefan Weinhuber "on a new path %x is below the active maximum " 1160a4d26c6aSStefan Weinhuber "%u\n", fcx_max_data, lpm, 1161a4d26c6aSStefan Weinhuber private->fcx_max_data); 1162a4d26c6aSStefan Weinhuber return -EACCES; 1163a4d26c6aSStefan Weinhuber } 1164a4d26c6aSStefan Weinhuber } 1165a4d26c6aSStefan Weinhuber return 0; 1166a4d26c6aSStefan Weinhuber } 1167a4d26c6aSStefan Weinhuber 1168b206181dSStefan Haberland static int rebuild_device_uid(struct dasd_device *device, 1169b206181dSStefan Haberland struct path_verification_work_data *data) 1170b206181dSStefan Haberland { 1171543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1172c9346151SStefan Haberland __u8 lpm, opm = dasd_path_get_opm(device); 1173543691a4SSebastian Ott int rc = -ENODEV; 1174b206181dSStefan Haberland 1175b206181dSStefan Haberland for (lpm = 0x80; lpm; lpm >>= 1) { 1176b206181dSStefan Haberland if (!(lpm & opm)) 1177b206181dSStefan Haberland continue; 1178b206181dSStefan Haberland memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1179b206181dSStefan Haberland memset(&data->cqr, 0, sizeof(data->cqr)); 1180b206181dSStefan Haberland data->cqr.cpaddr = &data->ccw; 1181b206181dSStefan Haberland rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1182b206181dSStefan Haberland data->rcd_buffer, 1183b206181dSStefan Haberland lpm); 1184b206181dSStefan Haberland 1185b206181dSStefan Haberland if (rc) { 1186b206181dSStefan Haberland if (rc == -EOPNOTSUPP) /* -EOPNOTSUPP is ok */ 1187b206181dSStefan Haberland continue; 1188b206181dSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1189b206181dSStefan Haberland "Read configuration data " 1190b206181dSStefan Haberland "returned error %d", rc); 1191b206181dSStefan Haberland break; 1192b206181dSStefan Haberland } 1193b206181dSStefan Haberland memcpy(private->conf_data, data->rcd_buffer, 1194b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE); 1195b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts(private)) { 1196b206181dSStefan Haberland rc = -ENODEV; 1197b206181dSStefan Haberland } else /* first valid path is enough */ 1198b206181dSStefan Haberland break; 1199b206181dSStefan Haberland } 1200b206181dSStefan Haberland 1201b206181dSStefan Haberland if (!rc) 1202b206181dSStefan Haberland rc = dasd_eckd_generate_uid(device); 1203b206181dSStefan Haberland 1204b206181dSStefan Haberland return rc; 1205b206181dSStefan Haberland } 1206b206181dSStefan Haberland 1207a4d26c6aSStefan Weinhuber static void do_path_verification_work(struct work_struct *work) 1208a4d26c6aSStefan Weinhuber { 1209a4d26c6aSStefan Weinhuber struct path_verification_work_data *data; 1210a4d26c6aSStefan Weinhuber struct dasd_device *device; 1211b206181dSStefan Haberland struct dasd_eckd_private path_private; 1212b206181dSStefan Haberland struct dasd_uid *uid; 1213b206181dSStefan Haberland __u8 path_rcd_buf[DASD_ECKD_RCD_DATA_SIZE]; 12145db8440cSStefan Haberland __u8 lpm, opm, npm, ppm, epm, hpfpm, cablepm; 1215a4d26c6aSStefan Weinhuber unsigned long flags; 1216b206181dSStefan Haberland char print_uid[60]; 1217a4d26c6aSStefan Weinhuber int rc; 1218a4d26c6aSStefan Weinhuber 1219a4d26c6aSStefan Weinhuber data = container_of(work, struct path_verification_work_data, worker); 1220a4d26c6aSStefan Weinhuber device = data->device; 1221a4d26c6aSStefan Weinhuber 1222c8d1c0ffSStefan Haberland /* delay path verification until device was resumed */ 1223c8d1c0ffSStefan Haberland if (test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 1224c8d1c0ffSStefan Haberland schedule_work(work); 1225c8d1c0ffSStefan Haberland return; 1226c8d1c0ffSStefan Haberland } 12271eb38023SStefan Haberland /* check if path verification already running and delay if so */ 12281eb38023SStefan Haberland if (test_and_set_bit(DASD_FLAG_PATH_VERIFY, &device->flags)) { 12291eb38023SStefan Haberland schedule_work(work); 12301eb38023SStefan Haberland return; 12311eb38023SStefan Haberland } 1232a4d26c6aSStefan Weinhuber opm = 0; 1233a4d26c6aSStefan Weinhuber npm = 0; 1234a4d26c6aSStefan Weinhuber ppm = 0; 1235a4d26c6aSStefan Weinhuber epm = 0; 12365db8440cSStefan Haberland hpfpm = 0; 12375db8440cSStefan Haberland cablepm = 0; 12385db8440cSStefan Haberland 1239a4d26c6aSStefan Weinhuber for (lpm = 0x80; lpm; lpm >>= 1) { 1240b206181dSStefan Haberland if (!(lpm & data->tbvpm)) 1241b206181dSStefan Haberland continue; 1242b206181dSStefan Haberland memset(&data->rcd_buffer, 0, sizeof(data->rcd_buffer)); 1243a4d26c6aSStefan Weinhuber memset(&data->cqr, 0, sizeof(data->cqr)); 1244a4d26c6aSStefan Weinhuber data->cqr.cpaddr = &data->ccw; 1245a4d26c6aSStefan Weinhuber rc = dasd_eckd_read_conf_immediately(device, &data->cqr, 1246a4d26c6aSStefan Weinhuber data->rcd_buffer, 1247a4d26c6aSStefan Weinhuber lpm); 1248a4d26c6aSStefan Weinhuber if (!rc) { 1249a4d26c6aSStefan Weinhuber switch (dasd_eckd_path_access(data->rcd_buffer, 1250b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE) 1251b206181dSStefan Haberland ) { 1252a4d26c6aSStefan Weinhuber case 0x02: 1253a4d26c6aSStefan Weinhuber npm |= lpm; 1254a4d26c6aSStefan Weinhuber break; 1255a4d26c6aSStefan Weinhuber case 0x03: 1256a4d26c6aSStefan Weinhuber ppm |= lpm; 1257a4d26c6aSStefan Weinhuber break; 1258a4d26c6aSStefan Weinhuber } 1259a4d26c6aSStefan Weinhuber opm |= lpm; 1260a4d26c6aSStefan Weinhuber } else if (rc == -EOPNOTSUPP) { 1261a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1262a4d26c6aSStefan Weinhuber "path verification: No configuration " 1263a4d26c6aSStefan Weinhuber "data retrieved"); 1264a4d26c6aSStefan Weinhuber opm |= lpm; 1265a4d26c6aSStefan Weinhuber } else if (rc == -EAGAIN) { 1266a4d26c6aSStefan Weinhuber DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1267a4d26c6aSStefan Weinhuber "path verification: device is stopped," 1268a4d26c6aSStefan Weinhuber " try again later"); 1269a4d26c6aSStefan Weinhuber epm |= lpm; 1270a4d26c6aSStefan Weinhuber } else { 1271a4d26c6aSStefan Weinhuber dev_warn(&device->cdev->dev, 1272a4d26c6aSStefan Weinhuber "Reading device feature codes failed " 1273a4d26c6aSStefan Weinhuber "(rc=%d) for new path %x\n", rc, lpm); 1274a4d26c6aSStefan Weinhuber continue; 1275a4d26c6aSStefan Weinhuber } 1276a4d26c6aSStefan Weinhuber if (verify_fcx_max_data(device, lpm)) { 1277a4d26c6aSStefan Weinhuber opm &= ~lpm; 1278a4d26c6aSStefan Weinhuber npm &= ~lpm; 1279a4d26c6aSStefan Weinhuber ppm &= ~lpm; 12805db8440cSStefan Haberland hpfpm |= lpm; 1281b206181dSStefan Haberland continue; 1282b206181dSStefan Haberland } 1283b206181dSStefan Haberland 1284b206181dSStefan Haberland /* 1285b206181dSStefan Haberland * save conf_data for comparison after 1286b206181dSStefan Haberland * rebuild_device_uid may have changed 1287b206181dSStefan Haberland * the original data 1288b206181dSStefan Haberland */ 1289b206181dSStefan Haberland memcpy(&path_rcd_buf, data->rcd_buffer, 1290b206181dSStefan Haberland DASD_ECKD_RCD_DATA_SIZE); 1291b206181dSStefan Haberland path_private.conf_data = (void *) &path_rcd_buf; 1292b206181dSStefan Haberland path_private.conf_len = DASD_ECKD_RCD_DATA_SIZE; 1293b206181dSStefan Haberland if (dasd_eckd_identify_conf_parts(&path_private)) { 1294b206181dSStefan Haberland path_private.conf_data = NULL; 1295b206181dSStefan Haberland path_private.conf_len = 0; 1296b206181dSStefan Haberland continue; 1297b206181dSStefan Haberland } 1298b206181dSStefan Haberland 1299b206181dSStefan Haberland /* 1300b206181dSStefan Haberland * compare path UID with device UID only if at least 1301b206181dSStefan Haberland * one valid path is left 1302b206181dSStefan Haberland * in other case the device UID may have changed and 1303b206181dSStefan Haberland * the first working path UID will be used as device UID 1304b206181dSStefan Haberland */ 1305c9346151SStefan Haberland if (dasd_path_get_opm(device) && 1306b206181dSStefan Haberland dasd_eckd_compare_path_uid(device, &path_private)) { 1307b206181dSStefan Haberland /* 1308b206181dSStefan Haberland * the comparison was not successful 1309b206181dSStefan Haberland * rebuild the device UID with at least one 1310b206181dSStefan Haberland * known path in case a z/VM hyperswap command 1311b206181dSStefan Haberland * has changed the device 1312b206181dSStefan Haberland * 1313b206181dSStefan Haberland * after this compare again 1314b206181dSStefan Haberland * 1315b206181dSStefan Haberland * if either the rebuild or the recompare fails 1316b206181dSStefan Haberland * the path can not be used 1317b206181dSStefan Haberland */ 1318b206181dSStefan Haberland if (rebuild_device_uid(device, data) || 1319b206181dSStefan Haberland dasd_eckd_compare_path_uid( 1320b206181dSStefan Haberland device, &path_private)) { 1321b206181dSStefan Haberland uid = &path_private.uid; 1322b206181dSStefan Haberland if (strlen(uid->vduit) > 0) 1323b206181dSStefan Haberland snprintf(print_uid, sizeof(print_uid), 1324b206181dSStefan Haberland "%s.%s.%04x.%02x.%s", 1325b206181dSStefan Haberland uid->vendor, uid->serial, 1326b206181dSStefan Haberland uid->ssid, uid->real_unit_addr, 1327b206181dSStefan Haberland uid->vduit); 1328b206181dSStefan Haberland else 1329b206181dSStefan Haberland snprintf(print_uid, sizeof(print_uid), 1330b206181dSStefan Haberland "%s.%s.%04x.%02x", 1331b206181dSStefan Haberland uid->vendor, uid->serial, 1332b206181dSStefan Haberland uid->ssid, 1333b206181dSStefan Haberland uid->real_unit_addr); 1334b206181dSStefan Haberland dev_err(&device->cdev->dev, 1335b206181dSStefan Haberland "The newly added channel path %02X " 1336b206181dSStefan Haberland "will not be used because it leads " 1337b206181dSStefan Haberland "to a different device %s\n", 1338b206181dSStefan Haberland lpm, print_uid); 1339b206181dSStefan Haberland opm &= ~lpm; 1340b206181dSStefan Haberland npm &= ~lpm; 1341b206181dSStefan Haberland ppm &= ~lpm; 13425db8440cSStefan Haberland cablepm |= lpm; 1343b206181dSStefan Haberland continue; 1344a4d26c6aSStefan Weinhuber } 1345a4d26c6aSStefan Weinhuber } 1346b206181dSStefan Haberland 1347a4d26c6aSStefan Weinhuber /* 1348a4d26c6aSStefan Weinhuber * There is a small chance that a path is lost again between 1349a4d26c6aSStefan Weinhuber * above path verification and the following modification of 1350a4d26c6aSStefan Weinhuber * the device opm mask. We could avoid that race here by using 1351a4d26c6aSStefan Weinhuber * yet another path mask, but we rather deal with this unlikely 1352a4d26c6aSStefan Weinhuber * situation in dasd_start_IO. 1353a4d26c6aSStefan Weinhuber */ 1354a4d26c6aSStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1355c9346151SStefan Haberland if (!dasd_path_get_opm(device) && opm) { 1356c9346151SStefan Haberland dasd_path_set_opm(device, opm); 1357a4d26c6aSStefan Weinhuber dasd_generic_path_operational(device); 13585db8440cSStefan Haberland } else { 1359c9346151SStefan Haberland dasd_path_add_opm(device, opm); 13605db8440cSStefan Haberland } 1361c9346151SStefan Haberland dasd_path_add_nppm(device, npm); 1362c9346151SStefan Haberland dasd_path_add_ppm(device, ppm); 1363c9346151SStefan Haberland dasd_path_add_tbvpm(device, epm); 1364c9346151SStefan Haberland dasd_path_add_cablepm(device, cablepm); 1365c9346151SStefan Haberland dasd_path_add_nohpfpm(device, hpfpm); 1366a4d26c6aSStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1367b206181dSStefan Haberland } 13681eb38023SStefan Haberland clear_bit(DASD_FLAG_PATH_VERIFY, &device->flags); 1369a4d26c6aSStefan Weinhuber dasd_put_device(device); 1370a4d26c6aSStefan Weinhuber if (data->isglobal) 1371a4d26c6aSStefan Weinhuber mutex_unlock(&dasd_path_verification_mutex); 1372a4d26c6aSStefan Weinhuber else 1373a4d26c6aSStefan Weinhuber kfree(data); 1374a4d26c6aSStefan Weinhuber } 1375a4d26c6aSStefan Weinhuber 1376a4d26c6aSStefan Weinhuber static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm) 1377a4d26c6aSStefan Weinhuber { 1378a4d26c6aSStefan Weinhuber struct path_verification_work_data *data; 1379a4d26c6aSStefan Weinhuber 1380a4d26c6aSStefan Weinhuber data = kmalloc(sizeof(*data), GFP_ATOMIC | GFP_DMA); 1381a4d26c6aSStefan Weinhuber if (!data) { 1382a4d26c6aSStefan Weinhuber if (mutex_trylock(&dasd_path_verification_mutex)) { 1383a4d26c6aSStefan Weinhuber data = path_verification_worker; 1384a4d26c6aSStefan Weinhuber data->isglobal = 1; 1385a4d26c6aSStefan Weinhuber } else 1386a4d26c6aSStefan Weinhuber return -ENOMEM; 1387a4d26c6aSStefan Weinhuber } else { 1388a4d26c6aSStefan Weinhuber memset(data, 0, sizeof(*data)); 1389a4d26c6aSStefan Weinhuber data->isglobal = 0; 1390a4d26c6aSStefan Weinhuber } 1391a4d26c6aSStefan Weinhuber INIT_WORK(&data->worker, do_path_verification_work); 1392a4d26c6aSStefan Weinhuber dasd_get_device(device); 1393a4d26c6aSStefan Weinhuber data->device = device; 1394a4d26c6aSStefan Weinhuber data->tbvpm = lpm; 1395a4d26c6aSStefan Weinhuber schedule_work(&data->worker); 1396a4d26c6aSStefan Weinhuber return 0; 1397a4d26c6aSStefan Weinhuber } 1398a4d26c6aSStefan Weinhuber 1399a521b048SStefan Haberland static void dasd_eckd_reset_path(struct dasd_device *device, __u8 pm) 1400a521b048SStefan Haberland { 1401a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 1402a521b048SStefan Haberland unsigned long flags; 1403a521b048SStefan Haberland 1404a521b048SStefan Haberland if (!private->fcx_max_data) 1405a521b048SStefan Haberland private->fcx_max_data = get_fcx_max_data(device); 1406a521b048SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 1407a521b048SStefan Haberland dasd_path_set_tbvpm(device, pm ? : dasd_path_get_notoperpm(device)); 1408a521b048SStefan Haberland dasd_schedule_device_bh(device); 1409a521b048SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 1410a521b048SStefan Haberland } 1411a521b048SStefan Haberland 14128e09f215SStefan Weinhuber static int dasd_eckd_read_features(struct dasd_device *device) 14138e09f215SStefan Weinhuber { 1414543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 14158e09f215SStefan Weinhuber struct dasd_psf_prssd_data *prssdp; 14168e09f215SStefan Weinhuber struct dasd_rssd_features *features; 14178e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 14188e09f215SStefan Weinhuber struct ccw1 *ccw; 14198e09f215SStefan Weinhuber int rc; 14208e09f215SStefan Weinhuber 142168d1e5f0SStefan Weinhuber memset(&private->features, 0, sizeof(struct dasd_rssd_features)); 142268b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 14238e09f215SStefan Weinhuber (sizeof(struct dasd_psf_prssd_data) + 14248e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)), 1425c5205f2fSSebastian Ott device, NULL); 14268e09f215SStefan Weinhuber if (IS_ERR(cqr)) { 1427b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not " 1428b8ed5dd5SStefan Haberland "allocate initialization request"); 14298e09f215SStefan Weinhuber return PTR_ERR(cqr); 14308e09f215SStefan Weinhuber } 14318e09f215SStefan Weinhuber cqr->startdev = device; 14328e09f215SStefan Weinhuber cqr->memdev = device; 14338e09f215SStefan Weinhuber cqr->block = NULL; 1434eb6e199bSStefan Weinhuber cqr->retries = 256; 14358e09f215SStefan Weinhuber cqr->expires = 10 * HZ; 14368e09f215SStefan Weinhuber 14378e09f215SStefan Weinhuber /* Prepare for Read Subsystem Data */ 14388e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 14398e09f215SStefan Weinhuber memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 14408e09f215SStefan Weinhuber prssdp->order = PSF_ORDER_PRSSD; 14418e09f215SStefan Weinhuber prssdp->suborder = 0x41; /* Read Feature Codes */ 14428e09f215SStefan Weinhuber /* all other bytes of prssdp must be zero */ 14438e09f215SStefan Weinhuber 14448e09f215SStefan Weinhuber ccw = cqr->cpaddr; 14458e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_PSF; 14468e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_psf_prssd_data); 14478e09f215SStefan Weinhuber ccw->flags |= CCW_FLAG_CC; 14488e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) prssdp; 14498e09f215SStefan Weinhuber 14508e09f215SStefan Weinhuber /* Read Subsystem Data - feature codes */ 14518e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 14528e09f215SStefan Weinhuber memset(features, 0, sizeof(struct dasd_rssd_features)); 14538e09f215SStefan Weinhuber 14548e09f215SStefan Weinhuber ccw++; 14558e09f215SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RSSD; 14568e09f215SStefan Weinhuber ccw->count = sizeof(struct dasd_rssd_features); 14578e09f215SStefan Weinhuber ccw->cda = (__u32)(addr_t) features; 14588e09f215SStefan Weinhuber 14591aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 14608e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 14618e09f215SStefan Weinhuber rc = dasd_sleep_on(cqr); 14628e09f215SStefan Weinhuber if (rc == 0) { 14638e09f215SStefan Weinhuber prssdp = (struct dasd_psf_prssd_data *) cqr->data; 14648e09f215SStefan Weinhuber features = (struct dasd_rssd_features *) (prssdp + 1); 14658e09f215SStefan Weinhuber memcpy(&private->features, features, 14668e09f215SStefan Weinhuber sizeof(struct dasd_rssd_features)); 146768d1e5f0SStefan Weinhuber } else 146868d1e5f0SStefan Weinhuber dev_warn(&device->cdev->dev, "Reading device feature codes" 146968d1e5f0SStefan Weinhuber " failed with rc=%d\n", rc); 14708e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 14718e09f215SStefan Weinhuber return rc; 14728e09f215SStefan Weinhuber } 14738e09f215SStefan Weinhuber 1474c729696bSJan Höppner /* Read Volume Information - Volume Storage Query */ 1475c729696bSJan Höppner static int dasd_eckd_read_vol_info(struct dasd_device *device) 1476c729696bSJan Höppner { 1477c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1478c729696bSJan Höppner struct dasd_psf_prssd_data *prssdp; 1479c729696bSJan Höppner struct dasd_rssd_vsq *vsq; 1480c729696bSJan Höppner struct dasd_ccw_req *cqr; 1481c729696bSJan Höppner struct ccw1 *ccw; 1482c729696bSJan Höppner int rc; 1483c729696bSJan Höppner 1484c729696bSJan Höppner /* This command cannot be executed on an alias device */ 1485c729696bSJan Höppner if (private->uid.type == UA_BASE_PAV_ALIAS || 1486c729696bSJan Höppner private->uid.type == UA_HYPER_PAV_ALIAS) 1487c729696bSJan Höppner return 0; 1488c729696bSJan Höppner 1489c729696bSJan Höppner cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 /* PSF + RSSD */, 1490c729696bSJan Höppner sizeof(*prssdp) + sizeof(*vsq), device, NULL); 1491c729696bSJan Höppner if (IS_ERR(cqr)) { 1492c729696bSJan Höppner DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1493c729696bSJan Höppner "Could not allocate initialization request"); 1494c729696bSJan Höppner return PTR_ERR(cqr); 1495c729696bSJan Höppner } 1496c729696bSJan Höppner 1497c729696bSJan Höppner /* Prepare for Read Subsystem Data */ 1498c729696bSJan Höppner prssdp = cqr->data; 1499c729696bSJan Höppner prssdp->order = PSF_ORDER_PRSSD; 1500c729696bSJan Höppner prssdp->suborder = PSF_SUBORDER_VSQ; /* Volume Storage Query */ 1501c729696bSJan Höppner prssdp->lss = private->ned->ID; 1502c729696bSJan Höppner prssdp->volume = private->ned->unit_addr; 1503c729696bSJan Höppner 1504c729696bSJan Höppner ccw = cqr->cpaddr; 1505c729696bSJan Höppner ccw->cmd_code = DASD_ECKD_CCW_PSF; 1506c729696bSJan Höppner ccw->count = sizeof(*prssdp); 1507c729696bSJan Höppner ccw->flags |= CCW_FLAG_CC; 1508c729696bSJan Höppner ccw->cda = (__u32)(addr_t)prssdp; 1509c729696bSJan Höppner 1510c729696bSJan Höppner /* Read Subsystem Data - Volume Storage Query */ 1511c729696bSJan Höppner vsq = (struct dasd_rssd_vsq *)(prssdp + 1); 1512c729696bSJan Höppner memset(vsq, 0, sizeof(*vsq)); 1513c729696bSJan Höppner 1514c729696bSJan Höppner ccw++; 1515c729696bSJan Höppner ccw->cmd_code = DASD_ECKD_CCW_RSSD; 1516c729696bSJan Höppner ccw->count = sizeof(*vsq); 1517c729696bSJan Höppner ccw->flags |= CCW_FLAG_SLI; 1518c729696bSJan Höppner ccw->cda = (__u32)(addr_t)vsq; 1519c729696bSJan Höppner 1520c729696bSJan Höppner cqr->buildclk = get_tod_clock(); 1521c729696bSJan Höppner cqr->status = DASD_CQR_FILLED; 1522c729696bSJan Höppner cqr->startdev = device; 1523c729696bSJan Höppner cqr->memdev = device; 1524c729696bSJan Höppner cqr->block = NULL; 1525c729696bSJan Höppner cqr->retries = 256; 1526c729696bSJan Höppner cqr->expires = device->default_expires * HZ; 1527c729696bSJan Höppner /* The command might not be supported. Suppress the error output */ 1528c729696bSJan Höppner __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); 1529c729696bSJan Höppner 1530c729696bSJan Höppner rc = dasd_sleep_on_interruptible(cqr); 1531c729696bSJan Höppner if (rc == 0) { 1532c729696bSJan Höppner memcpy(&private->vsq, vsq, sizeof(*vsq)); 1533c729696bSJan Höppner } else { 1534c729696bSJan Höppner dev_warn(&device->cdev->dev, 1535c729696bSJan Höppner "Reading the volume storage information failed with rc=%d\n", rc); 1536c729696bSJan Höppner } 1537c729696bSJan Höppner 1538c729696bSJan Höppner dasd_sfree_request(cqr, cqr->memdev); 1539c729696bSJan Höppner 1540c729696bSJan Höppner return rc; 1541c729696bSJan Höppner } 1542c729696bSJan Höppner 1543c729696bSJan Höppner static int dasd_eckd_is_ese(struct dasd_device *device) 1544c729696bSJan Höppner { 1545c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1546c729696bSJan Höppner 1547c729696bSJan Höppner return private->vsq.vol_info.ese; 1548c729696bSJan Höppner } 1549c729696bSJan Höppner 1550c729696bSJan Höppner static int dasd_eckd_ext_pool_id(struct dasd_device *device) 1551c729696bSJan Höppner { 1552c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1553c729696bSJan Höppner 1554c729696bSJan Höppner return private->vsq.extent_pool_id; 1555c729696bSJan Höppner } 1556c729696bSJan Höppner 1557c729696bSJan Höppner /* 1558c729696bSJan Höppner * This value represents the total amount of available space. As more space is 1559c729696bSJan Höppner * allocated by ESE volumes, this value will decrease. 1560c729696bSJan Höppner * The data for this value is therefore updated on any call. 1561c729696bSJan Höppner */ 1562c729696bSJan Höppner static int dasd_eckd_space_configured(struct dasd_device *device) 1563c729696bSJan Höppner { 1564c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1565c729696bSJan Höppner int rc; 1566c729696bSJan Höppner 1567c729696bSJan Höppner rc = dasd_eckd_read_vol_info(device); 1568c729696bSJan Höppner 1569c729696bSJan Höppner return rc ? : private->vsq.space_configured; 1570c729696bSJan Höppner } 1571c729696bSJan Höppner 1572c729696bSJan Höppner /* 1573c729696bSJan Höppner * The value of space allocated by an ESE volume may have changed and is 1574c729696bSJan Höppner * therefore updated on any call. 1575c729696bSJan Höppner */ 1576c729696bSJan Höppner static int dasd_eckd_space_allocated(struct dasd_device *device) 1577c729696bSJan Höppner { 1578c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1579c729696bSJan Höppner int rc; 1580c729696bSJan Höppner 1581c729696bSJan Höppner rc = dasd_eckd_read_vol_info(device); 1582c729696bSJan Höppner 1583c729696bSJan Höppner return rc ? : private->vsq.space_allocated; 1584c729696bSJan Höppner } 1585c729696bSJan Höppner 1586c729696bSJan Höppner static int dasd_eckd_logical_capacity(struct dasd_device *device) 1587c729696bSJan Höppner { 1588c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1589c729696bSJan Höppner 1590c729696bSJan Höppner return private->vsq.logical_capacity; 1591c729696bSJan Höppner } 1592c729696bSJan Höppner 1593c729696bSJan Höppner static void dasd_eckd_cpy_ext_pool_data(struct dasd_device *device, 1594c729696bSJan Höppner struct dasd_rssd_lcq *lcq) 1595c729696bSJan Höppner { 1596c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1597c729696bSJan Höppner int pool_id = dasd_eckd_ext_pool_id(device); 1598c729696bSJan Höppner struct dasd_ext_pool_sum eps; 1599c729696bSJan Höppner int i; 1600c729696bSJan Höppner 1601c729696bSJan Höppner for (i = 0; i < lcq->pool_count; i++) { 1602c729696bSJan Höppner eps = lcq->ext_pool_sum[i]; 1603c729696bSJan Höppner if (eps.pool_id == pool_id) { 1604c729696bSJan Höppner memcpy(&private->eps, &eps, 1605c729696bSJan Höppner sizeof(struct dasd_ext_pool_sum)); 1606c729696bSJan Höppner } 1607c729696bSJan Höppner } 1608c729696bSJan Höppner } 1609c729696bSJan Höppner 1610c729696bSJan Höppner /* Read Extent Pool Information - Logical Configuration Query */ 1611c729696bSJan Höppner static int dasd_eckd_read_ext_pool_info(struct dasd_device *device) 1612c729696bSJan Höppner { 1613c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1614c729696bSJan Höppner struct dasd_psf_prssd_data *prssdp; 1615c729696bSJan Höppner struct dasd_rssd_lcq *lcq; 1616c729696bSJan Höppner struct dasd_ccw_req *cqr; 1617c729696bSJan Höppner struct ccw1 *ccw; 1618c729696bSJan Höppner int rc; 1619c729696bSJan Höppner 1620c729696bSJan Höppner /* This command cannot be executed on an alias device */ 1621c729696bSJan Höppner if (private->uid.type == UA_BASE_PAV_ALIAS || 1622c729696bSJan Höppner private->uid.type == UA_HYPER_PAV_ALIAS) 1623c729696bSJan Höppner return 0; 1624c729696bSJan Höppner 1625c729696bSJan Höppner cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 /* PSF + RSSD */, 1626c729696bSJan Höppner sizeof(*prssdp) + sizeof(*lcq), device, NULL); 1627c729696bSJan Höppner if (IS_ERR(cqr)) { 1628c729696bSJan Höppner DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1629c729696bSJan Höppner "Could not allocate initialization request"); 1630c729696bSJan Höppner return PTR_ERR(cqr); 1631c729696bSJan Höppner } 1632c729696bSJan Höppner 1633c729696bSJan Höppner /* Prepare for Read Subsystem Data */ 1634c729696bSJan Höppner prssdp = cqr->data; 1635c729696bSJan Höppner memset(prssdp, 0, sizeof(*prssdp)); 1636c729696bSJan Höppner prssdp->order = PSF_ORDER_PRSSD; 1637c729696bSJan Höppner prssdp->suborder = PSF_SUBORDER_LCQ; /* Logical Configuration Query */ 1638c729696bSJan Höppner 1639c729696bSJan Höppner ccw = cqr->cpaddr; 1640c729696bSJan Höppner ccw->cmd_code = DASD_ECKD_CCW_PSF; 1641c729696bSJan Höppner ccw->count = sizeof(*prssdp); 1642c729696bSJan Höppner ccw->flags |= CCW_FLAG_CC; 1643c729696bSJan Höppner ccw->cda = (__u32)(addr_t)prssdp; 1644c729696bSJan Höppner 1645c729696bSJan Höppner lcq = (struct dasd_rssd_lcq *)(prssdp + 1); 1646c729696bSJan Höppner memset(lcq, 0, sizeof(*lcq)); 1647c729696bSJan Höppner 1648c729696bSJan Höppner ccw++; 1649c729696bSJan Höppner ccw->cmd_code = DASD_ECKD_CCW_RSSD; 1650c729696bSJan Höppner ccw->count = sizeof(*lcq); 1651c729696bSJan Höppner ccw->flags |= CCW_FLAG_SLI; 1652c729696bSJan Höppner ccw->cda = (__u32)(addr_t)lcq; 1653c729696bSJan Höppner 1654c729696bSJan Höppner cqr->buildclk = get_tod_clock(); 1655c729696bSJan Höppner cqr->status = DASD_CQR_FILLED; 1656c729696bSJan Höppner cqr->startdev = device; 1657c729696bSJan Höppner cqr->memdev = device; 1658c729696bSJan Höppner cqr->block = NULL; 1659c729696bSJan Höppner cqr->retries = 256; 1660c729696bSJan Höppner cqr->expires = device->default_expires * HZ; 1661c729696bSJan Höppner /* The command might not be supported. Suppress the error output */ 1662c729696bSJan Höppner __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); 1663c729696bSJan Höppner 1664c729696bSJan Höppner rc = dasd_sleep_on_interruptible(cqr); 1665c729696bSJan Höppner if (rc == 0) { 1666c729696bSJan Höppner dasd_eckd_cpy_ext_pool_data(device, lcq); 1667c729696bSJan Höppner } else { 1668c729696bSJan Höppner dev_warn(&device->cdev->dev, 1669c729696bSJan Höppner "Reading the logical configuration failed with rc=%d\n", rc); 1670c729696bSJan Höppner } 1671c729696bSJan Höppner 1672c729696bSJan Höppner dasd_sfree_request(cqr, cqr->memdev); 1673c729696bSJan Höppner 1674c729696bSJan Höppner return rc; 1675c729696bSJan Höppner } 1676c729696bSJan Höppner 1677c729696bSJan Höppner /* 1678c729696bSJan Höppner * Depending on the device type, the extent size is specified either as 1679c729696bSJan Höppner * cylinders per extent (CKD) or size per extent (FBA) 1680c729696bSJan Höppner * A 1GB size corresponds to 1113cyl, and 16MB to 21cyl. 1681c729696bSJan Höppner */ 1682c729696bSJan Höppner static int dasd_eckd_ext_size(struct dasd_device *device) 1683c729696bSJan Höppner { 1684c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1685c729696bSJan Höppner struct dasd_ext_pool_sum eps = private->eps; 1686c729696bSJan Höppner 1687c729696bSJan Höppner if (!eps.flags.extent_size_valid) 1688c729696bSJan Höppner return 0; 1689c729696bSJan Höppner if (eps.extent_size.size_1G) 1690c729696bSJan Höppner return 1113; 1691c729696bSJan Höppner if (eps.extent_size.size_16M) 1692c729696bSJan Höppner return 21; 1693c729696bSJan Höppner 1694c729696bSJan Höppner return 0; 1695c729696bSJan Höppner } 1696c729696bSJan Höppner 1697c729696bSJan Höppner static int dasd_eckd_ext_pool_warn_thrshld(struct dasd_device *device) 1698c729696bSJan Höppner { 1699c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1700c729696bSJan Höppner 1701c729696bSJan Höppner return private->eps.warn_thrshld; 1702c729696bSJan Höppner } 1703c729696bSJan Höppner 1704c729696bSJan Höppner static int dasd_eckd_ext_pool_cap_at_warnlevel(struct dasd_device *device) 1705c729696bSJan Höppner { 1706c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1707c729696bSJan Höppner 1708c729696bSJan Höppner return private->eps.flags.capacity_at_warnlevel; 1709c729696bSJan Höppner } 1710c729696bSJan Höppner 1711c729696bSJan Höppner /* 1712c729696bSJan Höppner * Extent Pool out of space 1713c729696bSJan Höppner */ 1714c729696bSJan Höppner static int dasd_eckd_ext_pool_oos(struct dasd_device *device) 1715c729696bSJan Höppner { 1716c729696bSJan Höppner struct dasd_eckd_private *private = device->private; 1717c729696bSJan Höppner 1718c729696bSJan Höppner return private->eps.flags.pool_oos; 1719c729696bSJan Höppner } 17208e09f215SStefan Weinhuber 17213d052595SHorst Hummel /* 172240545573SHorst Hummel * Build CP for Perform Subsystem Function - SSC. 172340545573SHorst Hummel */ 1724f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_psf_ssc(struct dasd_device *device, 1725f3eb5384SStefan Weinhuber int enable_pav) 172640545573SHorst Hummel { 172740545573SHorst Hummel struct dasd_ccw_req *cqr; 172840545573SHorst Hummel struct dasd_psf_ssc_data *psf_ssc_data; 172940545573SHorst Hummel struct ccw1 *ccw; 173040545573SHorst Hummel 173168b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 173240545573SHorst Hummel sizeof(struct dasd_psf_ssc_data), 1733c5205f2fSSebastian Ott device, NULL); 173440545573SHorst Hummel 173540545573SHorst Hummel if (IS_ERR(cqr)) { 1736fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 173740545573SHorst Hummel "Could not allocate PSF-SSC request"); 173840545573SHorst Hummel return cqr; 173940545573SHorst Hummel } 174040545573SHorst Hummel psf_ssc_data = (struct dasd_psf_ssc_data *)cqr->data; 174140545573SHorst Hummel psf_ssc_data->order = PSF_ORDER_SSC; 1742626350b6SStefan Weinhuber psf_ssc_data->suborder = 0xc0; 1743f3eb5384SStefan Weinhuber if (enable_pav) { 1744626350b6SStefan Weinhuber psf_ssc_data->suborder |= 0x08; 17458e09f215SStefan Weinhuber psf_ssc_data->reserved[0] = 0x88; 1746f3eb5384SStefan Weinhuber } 174740545573SHorst Hummel ccw = cqr->cpaddr; 174840545573SHorst Hummel ccw->cmd_code = DASD_ECKD_CCW_PSF; 174940545573SHorst Hummel ccw->cda = (__u32)(addr_t)psf_ssc_data; 175040545573SHorst Hummel ccw->count = 66; 175140545573SHorst Hummel 17528e09f215SStefan Weinhuber cqr->startdev = device; 17538e09f215SStefan Weinhuber cqr->memdev = device; 17548e09f215SStefan Weinhuber cqr->block = NULL; 1755eb6e199bSStefan Weinhuber cqr->retries = 256; 175640545573SHorst Hummel cqr->expires = 10*HZ; 17571aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 175840545573SHorst Hummel cqr->status = DASD_CQR_FILLED; 175940545573SHorst Hummel return cqr; 176040545573SHorst Hummel } 176140545573SHorst Hummel 176240545573SHorst Hummel /* 176340545573SHorst Hummel * Perform Subsystem Function. 176440545573SHorst Hummel * It is necessary to trigger CIO for channel revalidation since this 176540545573SHorst Hummel * call might change behaviour of DASD devices. 176640545573SHorst Hummel */ 176740545573SHorst Hummel static int 176812d7b107SStefan Haberland dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav, 176912d7b107SStefan Haberland unsigned long flags) 177040545573SHorst Hummel { 177140545573SHorst Hummel struct dasd_ccw_req *cqr; 177240545573SHorst Hummel int rc; 177340545573SHorst Hummel 1774f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_psf_ssc(device, enable_pav); 177540545573SHorst Hummel if (IS_ERR(cqr)) 177640545573SHorst Hummel return PTR_ERR(cqr); 177740545573SHorst Hummel 177812d7b107SStefan Haberland /* 177912d7b107SStefan Haberland * set flags e.g. turn on failfast, to prevent blocking 178012d7b107SStefan Haberland * the calling function should handle failed requests 178112d7b107SStefan Haberland */ 178212d7b107SStefan Haberland cqr->flags |= flags; 178312d7b107SStefan Haberland 178440545573SHorst Hummel rc = dasd_sleep_on(cqr); 178540545573SHorst Hummel if (!rc) 178640545573SHorst Hummel /* trigger CIO to reprobe devices */ 178740545573SHorst Hummel css_schedule_reprobe(); 178812d7b107SStefan Haberland else if (cqr->intrc == -EAGAIN) 178912d7b107SStefan Haberland rc = -EAGAIN; 179012d7b107SStefan Haberland 17918e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 179240545573SHorst Hummel return rc; 179340545573SHorst Hummel } 179440545573SHorst Hummel 179540545573SHorst Hummel /* 179640545573SHorst Hummel * Valide storage server of current device. 179740545573SHorst Hummel */ 179812d7b107SStefan Haberland static int dasd_eckd_validate_server(struct dasd_device *device, 179912d7b107SStefan Haberland unsigned long flags) 180040545573SHorst Hummel { 1801543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 1802543691a4SSebastian Ott int enable_pav, rc; 180340545573SHorst Hummel 1804f9f8d02fSStefan Haberland if (private->uid.type == UA_BASE_PAV_ALIAS || 1805f9f8d02fSStefan Haberland private->uid.type == UA_HYPER_PAV_ALIAS) 180612d7b107SStefan Haberland return 0; 180740545573SHorst Hummel if (dasd_nopav || MACHINE_IS_VM) 1808f3eb5384SStefan Weinhuber enable_pav = 0; 1809f3eb5384SStefan Weinhuber else 1810f3eb5384SStefan Weinhuber enable_pav = 1; 181112d7b107SStefan Haberland rc = dasd_eckd_psf_ssc(device, enable_pav, flags); 1812eb6e199bSStefan Weinhuber 181340545573SHorst Hummel /* may be requested feature is not available on server, 181440545573SHorst Hummel * therefore just report error and go ahead */ 1815b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x " 1816b8ed5dd5SStefan Haberland "returned rc=%d", private->uid.ssid, rc); 181712d7b107SStefan Haberland return rc; 181840545573SHorst Hummel } 181940545573SHorst Hummel 1820f1633031SStefan Haberland /* 1821f1633031SStefan Haberland * worker to do a validate server in case of a lost pathgroup 1822f1633031SStefan Haberland */ 1823f1633031SStefan Haberland static void dasd_eckd_do_validate_server(struct work_struct *work) 1824f1633031SStefan Haberland { 1825f1633031SStefan Haberland struct dasd_device *device = container_of(work, struct dasd_device, 1826f1633031SStefan Haberland kick_validate); 1827ea4da6eaSStefan Haberland unsigned long flags = 0; 1828ea4da6eaSStefan Haberland 1829ea4da6eaSStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &flags); 1830ea4da6eaSStefan Haberland if (dasd_eckd_validate_server(device, flags) 183112d7b107SStefan Haberland == -EAGAIN) { 183212d7b107SStefan Haberland /* schedule worker again if failed */ 183312d7b107SStefan Haberland schedule_work(&device->kick_validate); 183412d7b107SStefan Haberland return; 183512d7b107SStefan Haberland } 183612d7b107SStefan Haberland 1837f1633031SStefan Haberland dasd_put_device(device); 1838f1633031SStefan Haberland } 1839f1633031SStefan Haberland 1840f1633031SStefan Haberland static void dasd_eckd_kick_validate_server(struct dasd_device *device) 1841f1633031SStefan Haberland { 1842f1633031SStefan Haberland dasd_get_device(device); 184325e2cf1cSStefan Haberland /* exit if device not online or in offline processing */ 184425e2cf1cSStefan Haberland if (test_bit(DASD_FLAG_OFFLINE, &device->flags) || 184525e2cf1cSStefan Haberland device->state < DASD_STATE_ONLINE) { 184625e2cf1cSStefan Haberland dasd_put_device(device); 184725e2cf1cSStefan Haberland return; 184825e2cf1cSStefan Haberland } 1849f1633031SStefan Haberland /* queue call to do_validate_server to the kernel event daemon. */ 1850f2608cd4SStefan Haberland if (!schedule_work(&device->kick_validate)) 1851f2608cd4SStefan Haberland dasd_put_device(device); 1852f1633031SStefan Haberland } 1853f1633031SStefan Haberland 185440545573SHorst Hummel /* 18553d052595SHorst Hummel * Check device characteristics. 18563d052595SHorst Hummel * If the device is accessible using ECKD discipline, the device is enabled. 18573d052595SHorst Hummel */ 18581da177e4SLinus Torvalds static int 18591da177e4SLinus Torvalds dasd_eckd_check_characteristics(struct dasd_device *device) 18601da177e4SLinus Torvalds { 1861543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 18628e09f215SStefan Weinhuber struct dasd_block *block; 18632dedf0d9SStefan Haberland struct dasd_uid temp_uid; 1864f9f8d02fSStefan Haberland int rc, i; 186533b62a30SStefan Weinhuber int readonly; 18667c8faa86SStefan Haberland unsigned long value; 18671da177e4SLinus Torvalds 1868f1633031SStefan Haberland /* setup work queue for validate server*/ 1869f1633031SStefan Haberland INIT_WORK(&device->kick_validate, dasd_eckd_do_validate_server); 187059a9ed5fSStefan Haberland /* setup work queue for summary unit check */ 187159a9ed5fSStefan Haberland INIT_WORK(&device->suc_work, dasd_alias_handle_summary_unit_check); 1872f1633031SStefan Haberland 1873454e1fa1SPeter Oberparleiter if (!ccw_device_is_pathgroup(device->cdev)) { 1874454e1fa1SPeter Oberparleiter dev_warn(&device->cdev->dev, 1875454e1fa1SPeter Oberparleiter "A channel path group could not be established\n"); 1876454e1fa1SPeter Oberparleiter return -EIO; 1877454e1fa1SPeter Oberparleiter } 1878454e1fa1SPeter Oberparleiter if (!ccw_device_is_multipath(device->cdev)) { 1879454e1fa1SPeter Oberparleiter dev_info(&device->cdev->dev, 1880454e1fa1SPeter Oberparleiter "The DASD is not operating in multipath mode\n"); 1881454e1fa1SPeter Oberparleiter } 188292636b15SSebastian Ott if (!private) { 188392636b15SSebastian Ott private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA); 188492636b15SSebastian Ott if (!private) { 1885fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 1886fc19f381SStefan Haberland "Allocating memory for private DASD data " 1887fc19f381SStefan Haberland "failed\n"); 18881da177e4SLinus Torvalds return -ENOMEM; 18891da177e4SLinus Torvalds } 1890543691a4SSebastian Ott device->private = private; 189192636b15SSebastian Ott } else { 189292636b15SSebastian Ott memset(private, 0, sizeof(*private)); 18931da177e4SLinus Torvalds } 18941da177e4SLinus Torvalds /* Invalidate status of initial analysis. */ 18951da177e4SLinus Torvalds private->init_cqr_status = -1; 18961da177e4SLinus Torvalds /* Set default cache operations. */ 18971da177e4SLinus Torvalds private->attrib.operation = DASD_NORMAL_CACHE; 18981da177e4SLinus Torvalds private->attrib.nr_cyl = 0; 18991da177e4SLinus Torvalds 190040545573SHorst Hummel /* Read Configuration Data */ 190140545573SHorst Hummel rc = dasd_eckd_read_conf(device); 190240545573SHorst Hummel if (rc) 19038e09f215SStefan Weinhuber goto out_err1; 190440545573SHorst Hummel 1905a521b048SStefan Haberland /* set some default values */ 19067c8faa86SStefan Haberland device->default_expires = DASD_EXPIRES; 19071f1ee9adSHannes Reinecke device->default_retries = DASD_RETRIES; 1908a521b048SStefan Haberland device->path_thrhld = DASD_ECKD_PATH_THRHLD; 1909a521b048SStefan Haberland device->path_interval = DASD_ECKD_PATH_INTERVAL; 19101f1ee9adSHannes Reinecke 19117c8faa86SStefan Haberland if (private->gneq) { 19127c8faa86SStefan Haberland value = 1; 19137c8faa86SStefan Haberland for (i = 0; i < private->gneq->timeout.value; i++) 19147c8faa86SStefan Haberland value = 10 * value; 19157c8faa86SStefan Haberland value = value * private->gneq->timeout.number; 19167c8faa86SStefan Haberland /* do not accept useless values */ 19177c8faa86SStefan Haberland if (value != 0 && value <= DASD_EXPIRES_MAX) 19187c8faa86SStefan Haberland device->default_expires = value; 19197c8faa86SStefan Haberland } 19207c8faa86SStefan Haberland 19212dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 19222dedf0d9SStefan Haberland if (temp_uid.type == UA_BASE_DEVICE) { 19238e09f215SStefan Weinhuber block = dasd_alloc_block(); 19248e09f215SStefan Weinhuber if (IS_ERR(block)) { 1925b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 1926b8ed5dd5SStefan Haberland "could not allocate dasd " 1927b8ed5dd5SStefan Haberland "block structure"); 19288e09f215SStefan Weinhuber rc = PTR_ERR(block); 19298e09f215SStefan Weinhuber goto out_err1; 19308e09f215SStefan Weinhuber } 19318e09f215SStefan Weinhuber device->block = block; 19328e09f215SStefan Weinhuber block->base = device; 19338e09f215SStefan Weinhuber } 19348e09f215SStefan Weinhuber 1935f9f8d02fSStefan Haberland /* register lcu with alias handling, enable PAV */ 1936f9f8d02fSStefan Haberland rc = dasd_alias_make_device_known_to_lcu(device); 1937f9f8d02fSStefan Haberland if (rc) 19388e09f215SStefan Weinhuber goto out_err2; 1939f9f8d02fSStefan Haberland 194012d7b107SStefan Haberland dasd_eckd_validate_server(device, 0); 1941f4ac1d02SStefan Weinhuber 1942f4ac1d02SStefan Weinhuber /* device may report different configuration data after LCU setup */ 1943f4ac1d02SStefan Weinhuber rc = dasd_eckd_read_conf(device); 194440545573SHorst Hummel if (rc) 19458e09f215SStefan Weinhuber goto out_err3; 19468e09f215SStefan Weinhuber 19478e09f215SStefan Weinhuber /* Read Feature Codes */ 194868d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 194940545573SHorst Hummel 1950c729696bSJan Höppner /* Read Volume Information */ 1951c729696bSJan Höppner rc = dasd_eckd_read_vol_info(device); 1952c729696bSJan Höppner if (rc) 1953c729696bSJan Höppner goto out_err3; 1954c729696bSJan Höppner 1955c729696bSJan Höppner /* Read Extent Pool Information */ 1956c729696bSJan Höppner rc = dasd_eckd_read_ext_pool_info(device); 1957c729696bSJan Höppner if (rc) 1958c729696bSJan Höppner goto out_err3; 1959c729696bSJan Höppner 19601da177e4SLinus Torvalds /* Read Device Characteristics */ 196168b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 196268b781feSStefan Haberland &private->rdc_data, 64); 19638e09f215SStefan Weinhuber if (rc) { 1964b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 1965b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 19668e09f215SStefan Weinhuber goto out_err3; 19678e09f215SStefan Weinhuber } 196834cd551aSStefan Haberland 196934cd551aSStefan Haberland if ((device->features & DASD_FEATURE_USERAW) && 197034cd551aSStefan Haberland !(private->rdc_data.facilities.RT_in_LR)) { 197134cd551aSStefan Haberland dev_err(&device->cdev->dev, "The storage server does not " 197234cd551aSStefan Haberland "support raw-track access\n"); 197334cd551aSStefan Haberland rc = -EINVAL; 197434cd551aSStefan Haberland goto out_err3; 197534cd551aSStefan Haberland } 197634cd551aSStefan Haberland 1977817f2c84SNikanth Karthikesan /* find the valid cylinder size */ 1978b44b0ab3SStefan Weinhuber if (private->rdc_data.no_cyl == LV_COMPAT_CYL && 1979b44b0ab3SStefan Weinhuber private->rdc_data.long_no_cyl) 1980b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.long_no_cyl; 1981b44b0ab3SStefan Weinhuber else 1982b44b0ab3SStefan Weinhuber private->real_cyl = private->rdc_data.no_cyl; 1983b44b0ab3SStefan Weinhuber 1984ef19298bSStefan Weinhuber private->fcx_max_data = get_fcx_max_data(device); 1985ef19298bSStefan Weinhuber 198633b62a30SStefan Weinhuber readonly = dasd_device_is_ro(device); 198733b62a30SStefan Weinhuber if (readonly) 198833b62a30SStefan Weinhuber set_bit(DASD_FLAG_DEVICE_RO, &device->flags); 198933b62a30SStefan Weinhuber 1990fc19f381SStefan Haberland dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) " 199133b62a30SStefan Weinhuber "with %d cylinders, %d heads, %d sectors%s\n", 19921da177e4SLinus Torvalds private->rdc_data.dev_type, 19931da177e4SLinus Torvalds private->rdc_data.dev_model, 19941da177e4SLinus Torvalds private->rdc_data.cu_type, 19951da177e4SLinus Torvalds private->rdc_data.cu_model.model, 1996b44b0ab3SStefan Weinhuber private->real_cyl, 19971da177e4SLinus Torvalds private->rdc_data.trk_per_cyl, 199833b62a30SStefan Weinhuber private->rdc_data.sec_per_trk, 199933b62a30SStefan Weinhuber readonly ? ", read-only device" : ""); 20008e09f215SStefan Weinhuber return 0; 20018e09f215SStefan Weinhuber 20028e09f215SStefan Weinhuber out_err3: 20038e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 20048e09f215SStefan Weinhuber out_err2: 20058e09f215SStefan Weinhuber dasd_free_block(device->block); 20068e09f215SStefan Weinhuber device->block = NULL; 20078e09f215SStefan Weinhuber out_err1: 20084abb08c2SStefan Weinhuber kfree(private->conf_data); 20098e09f215SStefan Weinhuber kfree(device->private); 20108e09f215SStefan Weinhuber device->private = NULL; 20113d052595SHorst Hummel return rc; 20121da177e4SLinus Torvalds } 20131da177e4SLinus Torvalds 20148e09f215SStefan Weinhuber static void dasd_eckd_uncheck_device(struct dasd_device *device) 20158e09f215SStefan Weinhuber { 2016543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 2017b179b037SStefan Haberland int i; 20184abb08c2SStefan Weinhuber 20197c6553d4SStefan Haberland if (!private) 20207c6553d4SStefan Haberland return; 20217c6553d4SStefan Haberland 20228e09f215SStefan Weinhuber dasd_alias_disconnect_device_from_lcu(device); 20234abb08c2SStefan Weinhuber private->ned = NULL; 20244abb08c2SStefan Weinhuber private->sneq = NULL; 20254abb08c2SStefan Weinhuber private->vdsneq = NULL; 20264abb08c2SStefan Weinhuber private->gneq = NULL; 20274abb08c2SStefan Weinhuber private->conf_len = 0; 2028b179b037SStefan Haberland for (i = 0; i < 8; i++) { 2029c9346151SStefan Haberland kfree(device->path[i].conf_data); 2030c9346151SStefan Haberland if ((__u8 *)device->path[i].conf_data == 2031b179b037SStefan Haberland private->conf_data) { 2032b179b037SStefan Haberland private->conf_data = NULL; 2033b179b037SStefan Haberland private->conf_len = 0; 2034b179b037SStefan Haberland } 2035c9346151SStefan Haberland device->path[i].conf_data = NULL; 2036a521b048SStefan Haberland device->path[i].cssid = 0; 2037a521b048SStefan Haberland device->path[i].ssid = 0; 2038a521b048SStefan Haberland device->path[i].chpid = 0; 2039b179b037SStefan Haberland } 20404abb08c2SStefan Weinhuber kfree(private->conf_data); 20414abb08c2SStefan Weinhuber private->conf_data = NULL; 20428e09f215SStefan Weinhuber } 20438e09f215SStefan Weinhuber 20441da177e4SLinus Torvalds static struct dasd_ccw_req * 20451da177e4SLinus Torvalds dasd_eckd_analysis_ccw(struct dasd_device *device) 20461da177e4SLinus Torvalds { 2047543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 20481da177e4SLinus Torvalds struct eckd_count *count_data; 20491da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 20501da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 20511da177e4SLinus Torvalds struct ccw1 *ccw; 20521da177e4SLinus Torvalds int cplength, datasize; 20531da177e4SLinus Torvalds int i; 20541da177e4SLinus Torvalds 20551da177e4SLinus Torvalds cplength = 8; 20561da177e4SLinus Torvalds datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data); 2057c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device, 2058c5205f2fSSebastian Ott NULL); 20591da177e4SLinus Torvalds if (IS_ERR(cqr)) 20601da177e4SLinus Torvalds return cqr; 20611da177e4SLinus Torvalds ccw = cqr->cpaddr; 2062ce6915f5SJan Höppner /* Define extent for the first 2 tracks. */ 2063ce6915f5SJan Höppner define_extent(ccw++, cqr->data, 0, 1, 206445f186beSJan Höppner DASD_ECKD_CCW_READ_COUNT, device, 0); 20651da177e4SLinus Torvalds LO_data = cqr->data + sizeof(struct DE_eckd_data); 20661da177e4SLinus Torvalds /* Locate record for the first 4 records on track 0. */ 20671da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 20681da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 0, 0, 4, 20691da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 20701da177e4SLinus Torvalds 20711da177e4SLinus Torvalds count_data = private->count_area; 20721da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 20731da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 20741da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 20751da177e4SLinus Torvalds ccw->flags = 0; 20761da177e4SLinus Torvalds ccw->count = 8; 20771da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 20781da177e4SLinus Torvalds ccw++; 20791da177e4SLinus Torvalds count_data++; 20801da177e4SLinus Torvalds } 20811da177e4SLinus Torvalds 2082ce6915f5SJan Höppner /* Locate record for the first record on track 1. */ 20831da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 2084ce6915f5SJan Höppner locate_record(ccw++, LO_data++, 1, 0, 1, 20851da177e4SLinus Torvalds DASD_ECKD_CCW_READ_COUNT, device, 0); 20861da177e4SLinus Torvalds /* Read count ccw. */ 20871da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 20881da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 20891da177e4SLinus Torvalds ccw->flags = 0; 20901da177e4SLinus Torvalds ccw->count = 8; 20911da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) count_data; 20921da177e4SLinus Torvalds 20938e09f215SStefan Weinhuber cqr->block = NULL; 20948e09f215SStefan Weinhuber cqr->startdev = device; 20958e09f215SStefan Weinhuber cqr->memdev = device; 2096eb6e199bSStefan Weinhuber cqr->retries = 255; 20971aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 20981da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 20991da177e4SLinus Torvalds return cqr; 21001da177e4SLinus Torvalds } 21011da177e4SLinus Torvalds 2102eb6e199bSStefan Weinhuber /* differentiate between 'no record found' and any other error */ 2103eb6e199bSStefan Weinhuber static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr) 2104eb6e199bSStefan Weinhuber { 2105eb6e199bSStefan Weinhuber char *sense; 2106eb6e199bSStefan Weinhuber if (init_cqr->status == DASD_CQR_DONE) 2107eb6e199bSStefan Weinhuber return INIT_CQR_OK; 2108eb6e199bSStefan Weinhuber else if (init_cqr->status == DASD_CQR_NEED_ERP || 2109eb6e199bSStefan Weinhuber init_cqr->status == DASD_CQR_FAILED) { 2110eb6e199bSStefan Weinhuber sense = dasd_get_sense(&init_cqr->irb); 2111eb6e199bSStefan Weinhuber if (sense && (sense[1] & SNS1_NO_REC_FOUND)) 2112eb6e199bSStefan Weinhuber return INIT_CQR_UNFORMATTED; 2113eb6e199bSStefan Weinhuber else 2114eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 2115eb6e199bSStefan Weinhuber } else 2116eb6e199bSStefan Weinhuber return INIT_CQR_ERROR; 2117eb6e199bSStefan Weinhuber } 2118eb6e199bSStefan Weinhuber 21191da177e4SLinus Torvalds /* 21201da177e4SLinus Torvalds * This is the callback function for the init_analysis cqr. It saves 21211da177e4SLinus Torvalds * the status of the initial analysis ccw before it frees it and kicks 21221da177e4SLinus Torvalds * the device to continue the startup sequence. This will call 21231da177e4SLinus Torvalds * dasd_eckd_do_analysis again (if the devices has not been marked 21241da177e4SLinus Torvalds * for deletion in the meantime). 21251da177e4SLinus Torvalds */ 2126eb6e199bSStefan Weinhuber static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr, 2127eb6e199bSStefan Weinhuber void *data) 21281da177e4SLinus Torvalds { 2129543691a4SSebastian Ott struct dasd_device *device = init_cqr->startdev; 2130543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 21311da177e4SLinus Torvalds 2132eb6e199bSStefan Weinhuber private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr); 21331da177e4SLinus Torvalds dasd_sfree_request(init_cqr, device); 21341da177e4SLinus Torvalds dasd_kick_device(device); 21351da177e4SLinus Torvalds } 21361da177e4SLinus Torvalds 2137eb6e199bSStefan Weinhuber static int dasd_eckd_start_analysis(struct dasd_block *block) 21381da177e4SLinus Torvalds { 21391da177e4SLinus Torvalds struct dasd_ccw_req *init_cqr; 21401da177e4SLinus Torvalds 21418e09f215SStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(block->base); 21421da177e4SLinus Torvalds if (IS_ERR(init_cqr)) 21431da177e4SLinus Torvalds return PTR_ERR(init_cqr); 21441da177e4SLinus Torvalds init_cqr->callback = dasd_eckd_analysis_callback; 21451da177e4SLinus Torvalds init_cqr->callback_data = NULL; 21461da177e4SLinus Torvalds init_cqr->expires = 5*HZ; 2147eb6e199bSStefan Weinhuber /* first try without ERP, so we can later handle unformatted 2148eb6e199bSStefan Weinhuber * devices as special case 2149eb6e199bSStefan Weinhuber */ 2150eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &init_cqr->flags); 2151eb6e199bSStefan Weinhuber init_cqr->retries = 0; 21521da177e4SLinus Torvalds dasd_add_request_head(init_cqr); 21531da177e4SLinus Torvalds return -EAGAIN; 21541da177e4SLinus Torvalds } 21551da177e4SLinus Torvalds 2156eb6e199bSStefan Weinhuber static int dasd_eckd_end_analysis(struct dasd_block *block) 21571da177e4SLinus Torvalds { 2158543691a4SSebastian Ott struct dasd_device *device = block->base; 2159543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 21601da177e4SLinus Torvalds struct eckd_count *count_area; 21611da177e4SLinus Torvalds unsigned int sb, blk_per_trk; 21621da177e4SLinus Torvalds int status, i; 2163eb6e199bSStefan Weinhuber struct dasd_ccw_req *init_cqr; 21641da177e4SLinus Torvalds 21651da177e4SLinus Torvalds status = private->init_cqr_status; 21661da177e4SLinus Torvalds private->init_cqr_status = -1; 2167eb6e199bSStefan Weinhuber if (status == INIT_CQR_ERROR) { 2168eb6e199bSStefan Weinhuber /* try again, this time with full ERP */ 2169eb6e199bSStefan Weinhuber init_cqr = dasd_eckd_analysis_ccw(device); 2170eb6e199bSStefan Weinhuber dasd_sleep_on(init_cqr); 2171eb6e199bSStefan Weinhuber status = dasd_eckd_analysis_evaluation(init_cqr); 2172eb6e199bSStefan Weinhuber dasd_sfree_request(init_cqr, device); 2173eb6e199bSStefan Weinhuber } 2174eb6e199bSStefan Weinhuber 2175e4dbb0f2SStefan Haberland if (device->features & DASD_FEATURE_USERAW) { 2176e4dbb0f2SStefan Haberland block->bp_block = DASD_RAW_BLOCKSIZE; 2177e4dbb0f2SStefan Haberland blk_per_trk = DASD_RAW_BLOCK_PER_TRACK; 2178e4dbb0f2SStefan Haberland block->s2b_shift = 3; 2179e4dbb0f2SStefan Haberland goto raw; 2180e4dbb0f2SStefan Haberland } 2181e4dbb0f2SStefan Haberland 2182eb6e199bSStefan Weinhuber if (status == INIT_CQR_UNFORMATTED) { 2183eb6e199bSStefan Weinhuber dev_warn(&device->cdev->dev, "The DASD is not formatted\n"); 21841da177e4SLinus Torvalds return -EMEDIUMTYPE; 2185eb6e199bSStefan Weinhuber } else if (status == INIT_CQR_ERROR) { 2186eb6e199bSStefan Weinhuber dev_err(&device->cdev->dev, 2187eb6e199bSStefan Weinhuber "Detecting the DASD disk layout failed because " 2188eb6e199bSStefan Weinhuber "of an I/O error\n"); 2189eb6e199bSStefan Weinhuber return -EIO; 21901da177e4SLinus Torvalds } 21911da177e4SLinus Torvalds 21921da177e4SLinus Torvalds private->uses_cdl = 1; 21931da177e4SLinus Torvalds /* Check Track 0 for Compatible Disk Layout */ 21941da177e4SLinus Torvalds count_area = NULL; 21951da177e4SLinus Torvalds for (i = 0; i < 3; i++) { 21961da177e4SLinus Torvalds if (private->count_area[i].kl != 4 || 21973bc9fef9SStefan Haberland private->count_area[i].dl != dasd_eckd_cdl_reclen(i) - 4 || 21983bc9fef9SStefan Haberland private->count_area[i].cyl != 0 || 21993bc9fef9SStefan Haberland private->count_area[i].head != count_area_head[i] || 22003bc9fef9SStefan Haberland private->count_area[i].record != count_area_rec[i]) { 22011da177e4SLinus Torvalds private->uses_cdl = 0; 22021da177e4SLinus Torvalds break; 22031da177e4SLinus Torvalds } 22041da177e4SLinus Torvalds } 22051da177e4SLinus Torvalds if (i == 3) 2206ce6915f5SJan Höppner count_area = &private->count_area[3]; 22071da177e4SLinus Torvalds 22081da177e4SLinus Torvalds if (private->uses_cdl == 0) { 22091da177e4SLinus Torvalds for (i = 0; i < 5; i++) { 22101da177e4SLinus Torvalds if ((private->count_area[i].kl != 0) || 22111da177e4SLinus Torvalds (private->count_area[i].dl != 22123bc9fef9SStefan Haberland private->count_area[0].dl) || 22133bc9fef9SStefan Haberland private->count_area[i].cyl != 0 || 22143bc9fef9SStefan Haberland private->count_area[i].head != count_area_head[i] || 22153bc9fef9SStefan Haberland private->count_area[i].record != count_area_rec[i]) 22161da177e4SLinus Torvalds break; 22171da177e4SLinus Torvalds } 22181da177e4SLinus Torvalds if (i == 5) 22191da177e4SLinus Torvalds count_area = &private->count_area[0]; 22201da177e4SLinus Torvalds } else { 22211da177e4SLinus Torvalds if (private->count_area[3].record == 1) 2222fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 2223fc19f381SStefan Haberland "Track 0 has no records following the VTOC\n"); 22241da177e4SLinus Torvalds } 2225e4dbb0f2SStefan Haberland 22261da177e4SLinus Torvalds if (count_area != NULL && count_area->kl == 0) { 22271da177e4SLinus Torvalds /* we found notthing violating our disk layout */ 22281da177e4SLinus Torvalds if (dasd_check_blocksize(count_area->dl) == 0) 22298e09f215SStefan Weinhuber block->bp_block = count_area->dl; 22301da177e4SLinus Torvalds } 22318e09f215SStefan Weinhuber if (block->bp_block == 0) { 2232fc19f381SStefan Haberland dev_warn(&device->cdev->dev, 2233fc19f381SStefan Haberland "The disk layout of the DASD is not supported\n"); 22341da177e4SLinus Torvalds return -EMEDIUMTYPE; 22351da177e4SLinus Torvalds } 22368e09f215SStefan Weinhuber block->s2b_shift = 0; /* bits to shift 512 to get a block */ 22378e09f215SStefan Weinhuber for (sb = 512; sb < block->bp_block; sb = sb << 1) 22388e09f215SStefan Weinhuber block->s2b_shift++; 22391da177e4SLinus Torvalds 22408e09f215SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, block->bp_block); 2241e4dbb0f2SStefan Haberland 2242e4dbb0f2SStefan Haberland raw: 22432cc9637cSPeter Oberparleiter block->blocks = ((unsigned long) private->real_cyl * 22441da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 22451da177e4SLinus Torvalds blk_per_trk); 22461da177e4SLinus Torvalds 2247fc19f381SStefan Haberland dev_info(&device->cdev->dev, 22482cc9637cSPeter Oberparleiter "DASD with %u KB/block, %lu KB total size, %u KB/track, " 2249fc19f381SStefan Haberland "%s\n", (block->bp_block >> 10), 22502cc9637cSPeter Oberparleiter (((unsigned long) private->real_cyl * 22511da177e4SLinus Torvalds private->rdc_data.trk_per_cyl * 22528e09f215SStefan Weinhuber blk_per_trk * (block->bp_block >> 9)) >> 1), 22538e09f215SStefan Weinhuber ((blk_per_trk * block->bp_block) >> 10), 22541da177e4SLinus Torvalds private->uses_cdl ? 22551da177e4SLinus Torvalds "compatible disk layout" : "linux disk layout"); 22561da177e4SLinus Torvalds 22571da177e4SLinus Torvalds return 0; 22581da177e4SLinus Torvalds } 22591da177e4SLinus Torvalds 22608e09f215SStefan Weinhuber static int dasd_eckd_do_analysis(struct dasd_block *block) 22611da177e4SLinus Torvalds { 2262543691a4SSebastian Ott struct dasd_eckd_private *private = block->base->private; 22631da177e4SLinus Torvalds 22641da177e4SLinus Torvalds if (private->init_cqr_status < 0) 22658e09f215SStefan Weinhuber return dasd_eckd_start_analysis(block); 22661da177e4SLinus Torvalds else 22678e09f215SStefan Weinhuber return dasd_eckd_end_analysis(block); 22681da177e4SLinus Torvalds } 22691da177e4SLinus Torvalds 2270d42e1712SStefan Haberland static int dasd_eckd_basic_to_ready(struct dasd_device *device) 22718e09f215SStefan Weinhuber { 22728e09f215SStefan Weinhuber return dasd_alias_add_device(device); 22738e09f215SStefan Weinhuber }; 22748e09f215SStefan Weinhuber 22758e09f215SStefan Weinhuber static int dasd_eckd_online_to_ready(struct dasd_device *device) 22768e09f215SStefan Weinhuber { 2277669f3765SStefan Haberland if (cancel_work_sync(&device->reload_device)) 2278669f3765SStefan Haberland dasd_put_device(device); 2279669f3765SStefan Haberland if (cancel_work_sync(&device->kick_validate)) 2280669f3765SStefan Haberland dasd_put_device(device); 2281669f3765SStefan Haberland 2282d42e1712SStefan Haberland return 0; 2283d42e1712SStefan Haberland }; 2284d42e1712SStefan Haberland 2285daa991bfSStefan Haberland static int dasd_eckd_basic_to_known(struct dasd_device *device) 2286d42e1712SStefan Haberland { 22878e09f215SStefan Weinhuber return dasd_alias_remove_device(device); 22888e09f215SStefan Weinhuber }; 22898e09f215SStefan Weinhuber 22901da177e4SLinus Torvalds static int 22918e09f215SStefan Weinhuber dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo) 22921da177e4SLinus Torvalds { 2293543691a4SSebastian Ott struct dasd_eckd_private *private = block->base->private; 22941da177e4SLinus Torvalds 22958e09f215SStefan Weinhuber if (dasd_check_blocksize(block->bp_block) == 0) { 22961da177e4SLinus Torvalds geo->sectors = recs_per_track(&private->rdc_data, 22978e09f215SStefan Weinhuber 0, block->bp_block); 22981da177e4SLinus Torvalds } 22991da177e4SLinus Torvalds geo->cylinders = private->rdc_data.no_cyl; 23001da177e4SLinus Torvalds geo->heads = private->rdc_data.trk_per_cyl; 23011da177e4SLinus Torvalds return 0; 23021da177e4SLinus Torvalds } 23031da177e4SLinus Torvalds 23048fd57520SJan Höppner /* 23058fd57520SJan Höppner * Build the TCW request for the format check 23068fd57520SJan Höppner */ 23078fd57520SJan Höppner static struct dasd_ccw_req * 23088fd57520SJan Höppner dasd_eckd_build_check_tcw(struct dasd_device *base, struct format_data_t *fdata, 23098fd57520SJan Höppner int enable_pav, struct eckd_count *fmt_buffer, 23108fd57520SJan Höppner int rpt) 23118fd57520SJan Höppner { 23128fd57520SJan Höppner struct dasd_eckd_private *start_priv; 23138fd57520SJan Höppner struct dasd_device *startdev = NULL; 23148fd57520SJan Höppner struct tidaw *last_tidaw = NULL; 23158fd57520SJan Höppner struct dasd_ccw_req *cqr; 23168fd57520SJan Höppner struct itcw *itcw; 23178fd57520SJan Höppner int itcw_size; 23188fd57520SJan Höppner int count; 23198fd57520SJan Höppner int rc; 23208fd57520SJan Höppner int i; 23218fd57520SJan Höppner 23228fd57520SJan Höppner if (enable_pav) 23238fd57520SJan Höppner startdev = dasd_alias_get_start_dev(base); 23248fd57520SJan Höppner 23258fd57520SJan Höppner if (!startdev) 23268fd57520SJan Höppner startdev = base; 23278fd57520SJan Höppner 23288fd57520SJan Höppner start_priv = startdev->private; 23298fd57520SJan Höppner 23308fd57520SJan Höppner count = rpt * (fdata->stop_unit - fdata->start_unit + 1); 23318fd57520SJan Höppner 23328fd57520SJan Höppner /* 23338fd57520SJan Höppner * we're adding 'count' amount of tidaw to the itcw. 23348fd57520SJan Höppner * calculate the corresponding itcw_size 23358fd57520SJan Höppner */ 23368fd57520SJan Höppner itcw_size = itcw_calc_size(0, count, 0); 23378fd57520SJan Höppner 23385e2b17e7SJan Höppner cqr = dasd_fmalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev); 23398fd57520SJan Höppner if (IS_ERR(cqr)) 23408fd57520SJan Höppner return cqr; 23418fd57520SJan Höppner 23428fd57520SJan Höppner start_priv->count++; 23438fd57520SJan Höppner 23448fd57520SJan Höppner itcw = itcw_init(cqr->data, itcw_size, ITCW_OP_READ, 0, count, 0); 23458fd57520SJan Höppner if (IS_ERR(itcw)) { 23468fd57520SJan Höppner rc = -EINVAL; 23478fd57520SJan Höppner goto out_err; 23488fd57520SJan Höppner } 23498fd57520SJan Höppner 23508fd57520SJan Höppner cqr->cpaddr = itcw_get_tcw(itcw); 23518fd57520SJan Höppner rc = prepare_itcw(itcw, fdata->start_unit, fdata->stop_unit, 23528fd57520SJan Höppner DASD_ECKD_CCW_READ_COUNT_MT, base, startdev, 0, count, 23538fd57520SJan Höppner sizeof(struct eckd_count), 23548fd57520SJan Höppner count * sizeof(struct eckd_count), 0, rpt); 23558fd57520SJan Höppner if (rc) 23568fd57520SJan Höppner goto out_err; 23578fd57520SJan Höppner 23588fd57520SJan Höppner for (i = 0; i < count; i++) { 23598fd57520SJan Höppner last_tidaw = itcw_add_tidaw(itcw, 0, fmt_buffer++, 23608fd57520SJan Höppner sizeof(struct eckd_count)); 23618fd57520SJan Höppner if (IS_ERR(last_tidaw)) { 23628fd57520SJan Höppner rc = -EINVAL; 23638fd57520SJan Höppner goto out_err; 23648fd57520SJan Höppner } 23658fd57520SJan Höppner } 23668fd57520SJan Höppner 23678fd57520SJan Höppner last_tidaw->flags |= TIDAW_FLAGS_LAST; 23688fd57520SJan Höppner itcw_finalize(itcw); 23698fd57520SJan Höppner 23708fd57520SJan Höppner cqr->cpmode = 1; 23718fd57520SJan Höppner cqr->startdev = startdev; 23728fd57520SJan Höppner cqr->memdev = startdev; 23738fd57520SJan Höppner cqr->basedev = base; 23748fd57520SJan Höppner cqr->retries = startdev->default_retries; 23758fd57520SJan Höppner cqr->expires = startdev->default_expires * HZ; 23768fd57520SJan Höppner cqr->buildclk = get_tod_clock(); 23778fd57520SJan Höppner cqr->status = DASD_CQR_FILLED; 23788fd57520SJan Höppner /* Set flags to suppress output for expected errors */ 23798fd57520SJan Höppner set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); 23808fd57520SJan Höppner set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); 23818fd57520SJan Höppner 23828fd57520SJan Höppner return cqr; 23838fd57520SJan Höppner 23848fd57520SJan Höppner out_err: 23858fd57520SJan Höppner dasd_sfree_request(cqr, startdev); 23868fd57520SJan Höppner 23878fd57520SJan Höppner return ERR_PTR(rc); 23888fd57520SJan Höppner } 23898fd57520SJan Höppner 23908fd57520SJan Höppner /* 23918fd57520SJan Höppner * Build the CCW request for the format check 23928fd57520SJan Höppner */ 23938fd57520SJan Höppner static struct dasd_ccw_req * 23948fd57520SJan Höppner dasd_eckd_build_check(struct dasd_device *base, struct format_data_t *fdata, 23958fd57520SJan Höppner int enable_pav, struct eckd_count *fmt_buffer, int rpt) 23968fd57520SJan Höppner { 23978fd57520SJan Höppner struct dasd_eckd_private *start_priv; 23988fd57520SJan Höppner struct dasd_eckd_private *base_priv; 23998fd57520SJan Höppner struct dasd_device *startdev = NULL; 24008fd57520SJan Höppner struct dasd_ccw_req *cqr; 24018fd57520SJan Höppner struct ccw1 *ccw; 24028fd57520SJan Höppner void *data; 24038fd57520SJan Höppner int cplength, datasize; 24048fd57520SJan Höppner int use_prefix; 24058fd57520SJan Höppner int count; 24068fd57520SJan Höppner int i; 24078fd57520SJan Höppner 24088fd57520SJan Höppner if (enable_pav) 24098fd57520SJan Höppner startdev = dasd_alias_get_start_dev(base); 24108fd57520SJan Höppner 24118fd57520SJan Höppner if (!startdev) 24128fd57520SJan Höppner startdev = base; 24138fd57520SJan Höppner 24148fd57520SJan Höppner start_priv = startdev->private; 24158fd57520SJan Höppner base_priv = base->private; 24168fd57520SJan Höppner 24178fd57520SJan Höppner count = rpt * (fdata->stop_unit - fdata->start_unit + 1); 24188fd57520SJan Höppner 24198fd57520SJan Höppner use_prefix = base_priv->features.feature[8] & 0x01; 24208fd57520SJan Höppner 24218fd57520SJan Höppner if (use_prefix) { 24228fd57520SJan Höppner cplength = 1; 24238fd57520SJan Höppner datasize = sizeof(struct PFX_eckd_data); 24248fd57520SJan Höppner } else { 24258fd57520SJan Höppner cplength = 2; 24268fd57520SJan Höppner datasize = sizeof(struct DE_eckd_data) + 24278fd57520SJan Höppner sizeof(struct LO_eckd_data); 24288fd57520SJan Höppner } 24298fd57520SJan Höppner cplength += count; 24308fd57520SJan Höppner 24315e2b17e7SJan Höppner cqr = dasd_fmalloc_request(DASD_ECKD_MAGIC, cplength, datasize, startdev); 24328fd57520SJan Höppner if (IS_ERR(cqr)) 24338fd57520SJan Höppner return cqr; 24348fd57520SJan Höppner 24358fd57520SJan Höppner start_priv->count++; 24368fd57520SJan Höppner data = cqr->data; 24378fd57520SJan Höppner ccw = cqr->cpaddr; 24388fd57520SJan Höppner 24398fd57520SJan Höppner if (use_prefix) { 24408fd57520SJan Höppner prefix_LRE(ccw++, data, fdata->start_unit, fdata->stop_unit, 24418fd57520SJan Höppner DASD_ECKD_CCW_READ_COUNT, base, startdev, 1, 0, 24428fd57520SJan Höppner count, 0, 0); 24438fd57520SJan Höppner } else { 24448fd57520SJan Höppner define_extent(ccw++, data, fdata->start_unit, fdata->stop_unit, 244545f186beSJan Höppner DASD_ECKD_CCW_READ_COUNT, startdev, 0); 24468fd57520SJan Höppner 24478fd57520SJan Höppner data += sizeof(struct DE_eckd_data); 24488fd57520SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 24498fd57520SJan Höppner 24508fd57520SJan Höppner locate_record(ccw++, data, fdata->start_unit, 0, count, 24518fd57520SJan Höppner DASD_ECKD_CCW_READ_COUNT, base, 0); 24528fd57520SJan Höppner } 24538fd57520SJan Höppner 24548fd57520SJan Höppner for (i = 0; i < count; i++) { 24558fd57520SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 24568fd57520SJan Höppner ccw->cmd_code = DASD_ECKD_CCW_READ_COUNT; 24578fd57520SJan Höppner ccw->flags = CCW_FLAG_SLI; 24588fd57520SJan Höppner ccw->count = 8; 24598fd57520SJan Höppner ccw->cda = (__u32)(addr_t) fmt_buffer; 24608fd57520SJan Höppner ccw++; 24618fd57520SJan Höppner fmt_buffer++; 24628fd57520SJan Höppner } 24638fd57520SJan Höppner 24648fd57520SJan Höppner cqr->startdev = startdev; 24658fd57520SJan Höppner cqr->memdev = startdev; 24668fd57520SJan Höppner cqr->basedev = base; 24678fd57520SJan Höppner cqr->retries = DASD_RETRIES; 24688fd57520SJan Höppner cqr->expires = startdev->default_expires * HZ; 24698fd57520SJan Höppner cqr->buildclk = get_tod_clock(); 24708fd57520SJan Höppner cqr->status = DASD_CQR_FILLED; 24718fd57520SJan Höppner /* Set flags to suppress output for expected errors */ 24728fd57520SJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 24738fd57520SJan Höppner 24748fd57520SJan Höppner return cqr; 24758fd57520SJan Höppner } 24768fd57520SJan Höppner 24771da177e4SLinus Torvalds static struct dasd_ccw_req * 24785e2b17e7SJan Höppner dasd_eckd_build_format(struct dasd_device *base, struct dasd_device *startdev, 24795e2b17e7SJan Höppner struct format_data_t *fdata, int enable_pav) 24801da177e4SLinus Torvalds { 2481d42e1712SStefan Haberland struct dasd_eckd_private *base_priv; 2482d42e1712SStefan Haberland struct dasd_eckd_private *start_priv; 24831da177e4SLinus Torvalds struct dasd_ccw_req *fcp; 24841da177e4SLinus Torvalds struct eckd_count *ect; 2485d42e1712SStefan Haberland struct ch_t address; 24861da177e4SLinus Torvalds struct ccw1 *ccw; 24871da177e4SLinus Torvalds void *data; 2488b44b0ab3SStefan Weinhuber int rpt; 24891da177e4SLinus Torvalds int cplength, datasize; 2490d42e1712SStefan Haberland int i, j; 2491f9a28f7bSJean-Baptiste Joret int intensity = 0; 2492f9a28f7bSJean-Baptiste Joret int r0_perm; 2493d42e1712SStefan Haberland int nr_tracks; 249418d6624eSStefan Haberland int use_prefix; 24951da177e4SLinus Torvalds 2496a94fa154SStefan Haberland if (enable_pav) 2497d42e1712SStefan Haberland startdev = dasd_alias_get_start_dev(base); 249829b8dd9dSStefan Haberland 2499d42e1712SStefan Haberland if (!startdev) 2500d42e1712SStefan Haberland startdev = base; 25011da177e4SLinus Torvalds 2502543691a4SSebastian Ott start_priv = startdev->private; 2503543691a4SSebastian Ott base_priv = base->private; 2504d42e1712SStefan Haberland 2505d42e1712SStefan Haberland rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize); 2506d42e1712SStefan Haberland 2507d42e1712SStefan Haberland nr_tracks = fdata->stop_unit - fdata->start_unit + 1; 25081da177e4SLinus Torvalds 25091da177e4SLinus Torvalds /* 25101da177e4SLinus Torvalds * fdata->intensity is a bit string that tells us what to do: 25111da177e4SLinus Torvalds * Bit 0: write record zero 25121da177e4SLinus Torvalds * Bit 1: write home address, currently not supported 25131da177e4SLinus Torvalds * Bit 2: invalidate tracks 25141da177e4SLinus Torvalds * Bit 3: use OS/390 compatible disk layout (cdl) 2515f9a28f7bSJean-Baptiste Joret * Bit 4: do not allow storage subsystem to modify record zero 25161da177e4SLinus Torvalds * Only some bit combinations do make sense. 25171da177e4SLinus Torvalds */ 2518f9a28f7bSJean-Baptiste Joret if (fdata->intensity & 0x10) { 2519f9a28f7bSJean-Baptiste Joret r0_perm = 0; 2520f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity & ~0x10; 2521f9a28f7bSJean-Baptiste Joret } else { 2522f9a28f7bSJean-Baptiste Joret r0_perm = 1; 2523f9a28f7bSJean-Baptiste Joret intensity = fdata->intensity; 2524f9a28f7bSJean-Baptiste Joret } 2525d42e1712SStefan Haberland 252618d6624eSStefan Haberland use_prefix = base_priv->features.feature[8] & 0x01; 252718d6624eSStefan Haberland 2528f9a28f7bSJean-Baptiste Joret switch (intensity) { 25291da177e4SLinus Torvalds case 0x00: /* Normal format */ 25301da177e4SLinus Torvalds case 0x08: /* Normal format, use cdl. */ 2531d42e1712SStefan Haberland cplength = 2 + (rpt*nr_tracks); 253218d6624eSStefan Haberland if (use_prefix) 2533d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 25341da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 2535d42e1712SStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 253618d6624eSStefan Haberland else 253718d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 253818d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 253918d6624eSStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 25401da177e4SLinus Torvalds break; 25411da177e4SLinus Torvalds case 0x01: /* Write record zero and format track. */ 25421da177e4SLinus Torvalds case 0x09: /* Write record zero and format track, use cdl. */ 2543d42e1712SStefan Haberland cplength = 2 + rpt * nr_tracks; 254418d6624eSStefan Haberland if (use_prefix) 2545d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 25461da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 25471da177e4SLinus Torvalds sizeof(struct eckd_count) + 2548d42e1712SStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 254918d6624eSStefan Haberland else 255018d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 255118d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 255218d6624eSStefan Haberland sizeof(struct eckd_count) + 255318d6624eSStefan Haberland rpt * nr_tracks * sizeof(struct eckd_count); 25541da177e4SLinus Torvalds break; 25551da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 25561da177e4SLinus Torvalds case 0x0c: /* Invalidate track, use cdl. */ 25571da177e4SLinus Torvalds cplength = 3; 255818d6624eSStefan Haberland if (use_prefix) 2559d42e1712SStefan Haberland datasize = sizeof(struct PFX_eckd_data) + 25601da177e4SLinus Torvalds sizeof(struct LO_eckd_data) + 25611da177e4SLinus Torvalds sizeof(struct eckd_count); 256218d6624eSStefan Haberland else 256318d6624eSStefan Haberland datasize = sizeof(struct DE_eckd_data) + 256418d6624eSStefan Haberland sizeof(struct LO_eckd_data) + 256518d6624eSStefan Haberland sizeof(struct eckd_count); 25661da177e4SLinus Torvalds break; 25671da177e4SLinus Torvalds default: 2568d42e1712SStefan Haberland dev_warn(&startdev->cdev->dev, 2569d42e1712SStefan Haberland "An I/O control call used incorrect flags 0x%x\n", 2570d42e1712SStefan Haberland fdata->intensity); 25711da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 25721da177e4SLinus Torvalds } 25735e2b17e7SJan Höppner 25745e2b17e7SJan Höppner fcp = dasd_fmalloc_request(DASD_ECKD_MAGIC, cplength, datasize, startdev); 25751da177e4SLinus Torvalds if (IS_ERR(fcp)) 25761da177e4SLinus Torvalds return fcp; 25771da177e4SLinus Torvalds 2578d42e1712SStefan Haberland start_priv->count++; 25791da177e4SLinus Torvalds data = fcp->data; 25801da177e4SLinus Torvalds ccw = fcp->cpaddr; 25811da177e4SLinus Torvalds 2582f9a28f7bSJean-Baptiste Joret switch (intensity & ~0x08) { 25831da177e4SLinus Torvalds case 0x00: /* Normal format. */ 258418d6624eSStefan Haberland if (use_prefix) { 2585d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2586d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 2587d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2588f9a28f7bSJean-Baptiste Joret /* grant subsystem permission to format R0 */ 2589f9a28f7bSJean-Baptiste Joret if (r0_perm) 2590d42e1712SStefan Haberland ((struct PFX_eckd_data *)data) 2591d42e1712SStefan Haberland ->define_extent.ga_extended |= 0x04; 2592d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 259318d6624eSStefan Haberland } else { 259418d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 259518d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 259645f186beSJan Höppner DASD_ECKD_CCW_WRITE_CKD, startdev, 0); 259718d6624eSStefan Haberland /* grant subsystem permission to format R0 */ 259818d6624eSStefan Haberland if (r0_perm) 259918d6624eSStefan Haberland ((struct DE_eckd_data *) data) 260018d6624eSStefan Haberland ->ga_extended |= 0x04; 260118d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 260218d6624eSStefan Haberland } 26031da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 26041da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 2605d42e1712SStefan Haberland fdata->start_unit, 0, rpt*nr_tracks, 2606d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, 26071da177e4SLinus Torvalds fdata->blksize); 26081da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 26091da177e4SLinus Torvalds break; 26101da177e4SLinus Torvalds case 0x01: /* Write record zero + format track. */ 261118d6624eSStefan Haberland if (use_prefix) { 2612d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2613d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 26141da177e4SLinus Torvalds DASD_ECKD_CCW_WRITE_RECORD_ZERO, 2615d42e1712SStefan Haberland base, startdev); 2616d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 261718d6624eSStefan Haberland } else { 261818d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 261918d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 262045f186beSJan Höppner DASD_ECKD_CCW_WRITE_RECORD_ZERO, startdev, 0); 262118d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 262218d6624eSStefan Haberland } 26231da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 26241da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 2625d42e1712SStefan Haberland fdata->start_unit, 0, rpt * nr_tracks + 1, 2626d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_RECORD_ZERO, base, 2627d42e1712SStefan Haberland base->block->bp_block); 26281da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 26291da177e4SLinus Torvalds break; 26301da177e4SLinus Torvalds case 0x04: /* Invalidate track. */ 263118d6624eSStefan Haberland if (use_prefix) { 2632d42e1712SStefan Haberland prefix(ccw++, (struct PFX_eckd_data *) data, 2633d42e1712SStefan Haberland fdata->start_unit, fdata->stop_unit, 2634d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, startdev); 2635d42e1712SStefan Haberland data += sizeof(struct PFX_eckd_data); 263618d6624eSStefan Haberland } else { 263718d6624eSStefan Haberland define_extent(ccw++, (struct DE_eckd_data *) data, 263818d6624eSStefan Haberland fdata->start_unit, fdata->stop_unit, 263945f186beSJan Höppner DASD_ECKD_CCW_WRITE_CKD, startdev, 0); 264018d6624eSStefan Haberland data += sizeof(struct DE_eckd_data); 264118d6624eSStefan Haberland } 26421da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 26431da177e4SLinus Torvalds locate_record(ccw++, (struct LO_eckd_data *) data, 26441da177e4SLinus Torvalds fdata->start_unit, 0, 1, 2645d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD, base, 8); 26461da177e4SLinus Torvalds data += sizeof(struct LO_eckd_data); 26471da177e4SLinus Torvalds break; 26481da177e4SLinus Torvalds } 2649d42e1712SStefan Haberland 2650d42e1712SStefan Haberland for (j = 0; j < nr_tracks; j++) { 2651d42e1712SStefan Haberland /* calculate cylinder and head for the current track */ 2652d42e1712SStefan Haberland set_ch_t(&address, 2653d42e1712SStefan Haberland (fdata->start_unit + j) / 2654d42e1712SStefan Haberland base_priv->rdc_data.trk_per_cyl, 2655d42e1712SStefan Haberland (fdata->start_unit + j) % 2656d42e1712SStefan Haberland base_priv->rdc_data.trk_per_cyl); 2657f9a28f7bSJean-Baptiste Joret if (intensity & 0x01) { /* write record zero */ 26581da177e4SLinus Torvalds ect = (struct eckd_count *) data; 26591da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2660b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2661b44b0ab3SStefan Weinhuber ect->head = address.head; 26621da177e4SLinus Torvalds ect->record = 0; 26631da177e4SLinus Torvalds ect->kl = 0; 26641da177e4SLinus Torvalds ect->dl = 8; 26651da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 26661da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_RECORD_ZERO; 26671da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 26681da177e4SLinus Torvalds ccw->count = 8; 26691da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 26701da177e4SLinus Torvalds ccw++; 26711da177e4SLinus Torvalds } 2672f9a28f7bSJean-Baptiste Joret if ((intensity & ~0x08) & 0x04) { /* erase track */ 26731da177e4SLinus Torvalds ect = (struct eckd_count *) data; 26741da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2675b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2676b44b0ab3SStefan Weinhuber ect->head = address.head; 26771da177e4SLinus Torvalds ect->record = 1; 26781da177e4SLinus Torvalds ect->kl = 0; 26791da177e4SLinus Torvalds ect->dl = 0; 26801da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 26811da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_WRITE_CKD; 26821da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 26831da177e4SLinus Torvalds ccw->count = 8; 26841da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 26851da177e4SLinus Torvalds } else { /* write remaining records */ 26861da177e4SLinus Torvalds for (i = 0; i < rpt; i++) { 26871da177e4SLinus Torvalds ect = (struct eckd_count *) data; 26881da177e4SLinus Torvalds data += sizeof(struct eckd_count); 2689b44b0ab3SStefan Weinhuber ect->cyl = address.cyl; 2690b44b0ab3SStefan Weinhuber ect->head = address.head; 26911da177e4SLinus Torvalds ect->record = i + 1; 26921da177e4SLinus Torvalds ect->kl = 0; 26931da177e4SLinus Torvalds ect->dl = fdata->blksize; 2694d42e1712SStefan Haberland /* 2695d42e1712SStefan Haberland * Check for special tracks 0-1 2696d42e1712SStefan Haberland * when formatting CDL 2697d42e1712SStefan Haberland */ 2698f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 269946d1c03cSJan Höppner address.cyl == 0 && address.head == 0) { 27001da177e4SLinus Torvalds if (i < 3) { 27011da177e4SLinus Torvalds ect->kl = 4; 27021da177e4SLinus Torvalds ect->dl = sizes_trk0[i] - 4; 27031da177e4SLinus Torvalds } 27041da177e4SLinus Torvalds } 2705f9a28f7bSJean-Baptiste Joret if ((intensity & 0x08) && 270646d1c03cSJan Höppner address.cyl == 0 && address.head == 1) { 27071da177e4SLinus Torvalds ect->kl = 44; 27081da177e4SLinus Torvalds ect->dl = LABEL_SIZE - 44; 27091da177e4SLinus Torvalds } 27101da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 2711d42e1712SStefan Haberland if (i != 0 || j == 0) 2712d42e1712SStefan Haberland ccw->cmd_code = 2713d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD; 2714d42e1712SStefan Haberland else 2715d42e1712SStefan Haberland ccw->cmd_code = 2716d42e1712SStefan Haberland DASD_ECKD_CCW_WRITE_CKD_MT; 27171da177e4SLinus Torvalds ccw->flags = CCW_FLAG_SLI; 27181da177e4SLinus Torvalds ccw->count = 8; 27191da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) ect; 27201da177e4SLinus Torvalds ccw++; 27211da177e4SLinus Torvalds } 27221da177e4SLinus Torvalds } 2723d42e1712SStefan Haberland } 2724d42e1712SStefan Haberland 2725d42e1712SStefan Haberland fcp->startdev = startdev; 2726d42e1712SStefan Haberland fcp->memdev = startdev; 272729b8dd9dSStefan Haberland fcp->basedev = base; 2728eb6e199bSStefan Weinhuber fcp->retries = 256; 2729d42e1712SStefan Haberland fcp->expires = startdev->default_expires * HZ; 27301aae0560SHeiko Carstens fcp->buildclk = get_tod_clock(); 27311da177e4SLinus Torvalds fcp->status = DASD_CQR_FILLED; 2732d42e1712SStefan Haberland 27331da177e4SLinus Torvalds return fcp; 27341da177e4SLinus Torvalds } 27351da177e4SLinus Torvalds 2736570d237cSJan Höppner /* 2737570d237cSJan Höppner * Wrapper function to build a CCW request depending on input data 2738570d237cSJan Höppner */ 2739570d237cSJan Höppner static struct dasd_ccw_req * 2740570d237cSJan Höppner dasd_eckd_format_build_ccw_req(struct dasd_device *base, 27418fd57520SJan Höppner struct format_data_t *fdata, int enable_pav, 27428fd57520SJan Höppner int tpm, struct eckd_count *fmt_buffer, int rpt) 2743d42e1712SStefan Haberland { 27448fd57520SJan Höppner struct dasd_ccw_req *ccw_req; 27458fd57520SJan Höppner 27468fd57520SJan Höppner if (!fmt_buffer) { 27475e2b17e7SJan Höppner ccw_req = dasd_eckd_build_format(base, NULL, fdata, enable_pav); 27488fd57520SJan Höppner } else { 27498fd57520SJan Höppner if (tpm) 27508fd57520SJan Höppner ccw_req = dasd_eckd_build_check_tcw(base, fdata, 27518fd57520SJan Höppner enable_pav, 27528fd57520SJan Höppner fmt_buffer, rpt); 27538fd57520SJan Höppner else 27548fd57520SJan Höppner ccw_req = dasd_eckd_build_check(base, fdata, enable_pav, 27558fd57520SJan Höppner fmt_buffer, rpt); 27568fd57520SJan Höppner } 27578fd57520SJan Höppner 27588fd57520SJan Höppner return ccw_req; 2759570d237cSJan Höppner } 2760570d237cSJan Höppner 2761570d237cSJan Höppner /* 2762570d237cSJan Höppner * Sanity checks on format_data 2763570d237cSJan Höppner */ 2764570d237cSJan Höppner static int dasd_eckd_format_sanity_checks(struct dasd_device *base, 2765570d237cSJan Höppner struct format_data_t *fdata) 2766570d237cSJan Höppner { 2767543691a4SSebastian Ott struct dasd_eckd_private *private = base->private; 2768d42e1712SStefan Haberland 2769d42e1712SStefan Haberland if (fdata->start_unit >= 2770d42e1712SStefan Haberland (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2771d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2772d42e1712SStefan Haberland "Start track number %u used in formatting is too big\n", 2773d42e1712SStefan Haberland fdata->start_unit); 2774d42e1712SStefan Haberland return -EINVAL; 2775d42e1712SStefan Haberland } 2776d42e1712SStefan Haberland if (fdata->stop_unit >= 2777d42e1712SStefan Haberland (private->real_cyl * private->rdc_data.trk_per_cyl)) { 2778d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2779d42e1712SStefan Haberland "Stop track number %u used in formatting is too big\n", 2780d42e1712SStefan Haberland fdata->stop_unit); 2781d42e1712SStefan Haberland return -EINVAL; 2782d42e1712SStefan Haberland } 2783d42e1712SStefan Haberland if (fdata->start_unit > fdata->stop_unit) { 2784d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2785d42e1712SStefan Haberland "Start track %u used in formatting exceeds end track\n", 2786d42e1712SStefan Haberland fdata->start_unit); 2787d42e1712SStefan Haberland return -EINVAL; 2788d42e1712SStefan Haberland } 2789d42e1712SStefan Haberland if (dasd_check_blocksize(fdata->blksize) != 0) { 2790d42e1712SStefan Haberland dev_warn(&base->cdev->dev, 2791d42e1712SStefan Haberland "The DASD cannot be formatted with block size %u\n", 2792d42e1712SStefan Haberland fdata->blksize); 2793d42e1712SStefan Haberland return -EINVAL; 2794d42e1712SStefan Haberland } 2795570d237cSJan Höppner return 0; 2796570d237cSJan Höppner } 2797570d237cSJan Höppner 2798570d237cSJan Höppner /* 2799570d237cSJan Höppner * This function will process format_data originally coming from an IOCTL 2800570d237cSJan Höppner */ 2801570d237cSJan Höppner static int dasd_eckd_format_process_data(struct dasd_device *base, 2802570d237cSJan Höppner struct format_data_t *fdata, 28038fd57520SJan Höppner int enable_pav, int tpm, 28048fd57520SJan Höppner struct eckd_count *fmt_buffer, int rpt, 28058fd57520SJan Höppner struct irb *irb) 2806570d237cSJan Höppner { 2807543691a4SSebastian Ott struct dasd_eckd_private *private = base->private; 2808570d237cSJan Höppner struct dasd_ccw_req *cqr, *n; 2809570d237cSJan Höppner struct list_head format_queue; 2810570d237cSJan Höppner struct dasd_device *device; 28118fd57520SJan Höppner char *sense = NULL; 2812570d237cSJan Höppner int old_start, old_stop, format_step; 2813570d237cSJan Höppner int step, retry; 2814570d237cSJan Höppner int rc; 2815570d237cSJan Höppner 2816570d237cSJan Höppner rc = dasd_eckd_format_sanity_checks(base, fdata); 2817570d237cSJan Höppner if (rc) 2818570d237cSJan Höppner return rc; 2819d42e1712SStefan Haberland 2820d42e1712SStefan Haberland INIT_LIST_HEAD(&format_queue); 2821d42e1712SStefan Haberland 282246d1c03cSJan Höppner old_start = fdata->start_unit; 282329b8dd9dSStefan Haberland old_stop = fdata->stop_unit; 2824d42e1712SStefan Haberland 28258fd57520SJan Höppner if (!tpm && fmt_buffer != NULL) { 28268fd57520SJan Höppner /* Command Mode / Format Check */ 28278fd57520SJan Höppner format_step = 1; 28288fd57520SJan Höppner } else if (tpm && fmt_buffer != NULL) { 28298fd57520SJan Höppner /* Transport Mode / Format Check */ 28308fd57520SJan Höppner format_step = DASD_CQR_MAX_CCW / rpt; 28318fd57520SJan Höppner } else { 28328fd57520SJan Höppner /* Normal Formatting */ 28338fd57520SJan Höppner format_step = DASD_CQR_MAX_CCW / 28348fd57520SJan Höppner recs_per_track(&private->rdc_data, 0, fdata->blksize); 28358fd57520SJan Höppner } 28368fd57520SJan Höppner 283746d1c03cSJan Höppner do { 283846d1c03cSJan Höppner retry = 0; 2839d42e1712SStefan Haberland while (fdata->start_unit <= old_stop) { 2840d42e1712SStefan Haberland step = fdata->stop_unit - fdata->start_unit + 1; 284146d1c03cSJan Höppner if (step > format_step) { 284246d1c03cSJan Höppner fdata->stop_unit = 284346d1c03cSJan Höppner fdata->start_unit + format_step - 1; 284446d1c03cSJan Höppner } 2845d42e1712SStefan Haberland 2846570d237cSJan Höppner cqr = dasd_eckd_format_build_ccw_req(base, fdata, 28478fd57520SJan Höppner enable_pav, tpm, 28488fd57520SJan Höppner fmt_buffer, rpt); 2849d42e1712SStefan Haberland if (IS_ERR(cqr)) { 285046d1c03cSJan Höppner rc = PTR_ERR(cqr); 285146d1c03cSJan Höppner if (rc == -ENOMEM) { 285246d1c03cSJan Höppner if (list_empty(&format_queue)) 285346d1c03cSJan Höppner goto out; 2854d42e1712SStefan Haberland /* 285546d1c03cSJan Höppner * not enough memory available, start 285646d1c03cSJan Höppner * requests retry after first requests 285746d1c03cSJan Höppner * were finished 2858d42e1712SStefan Haberland */ 285946d1c03cSJan Höppner retry = 1; 286046d1c03cSJan Höppner break; 2861d42e1712SStefan Haberland } 286246d1c03cSJan Höppner goto out_err; 286346d1c03cSJan Höppner } 286446d1c03cSJan Höppner list_add_tail(&cqr->blocklist, &format_queue); 2865d42e1712SStefan Haberland 28668fd57520SJan Höppner if (fmt_buffer) { 28678fd57520SJan Höppner step = fdata->stop_unit - fdata->start_unit + 1; 28688fd57520SJan Höppner fmt_buffer += rpt * step; 28698fd57520SJan Höppner } 2870d42e1712SStefan Haberland fdata->start_unit = fdata->stop_unit + 1; 2871d42e1712SStefan Haberland fdata->stop_unit = old_stop; 2872d42e1712SStefan Haberland } 2873d42e1712SStefan Haberland 287446d1c03cSJan Höppner rc = dasd_sleep_on_queue(&format_queue); 2875d42e1712SStefan Haberland 287646d1c03cSJan Höppner out_err: 2877d42e1712SStefan Haberland list_for_each_entry_safe(cqr, n, &format_queue, blocklist) { 2878d42e1712SStefan Haberland device = cqr->startdev; 2879543691a4SSebastian Ott private = device->private; 28808fd57520SJan Höppner 28818fd57520SJan Höppner if (cqr->status == DASD_CQR_FAILED) { 28828fd57520SJan Höppner /* 28838fd57520SJan Höppner * Only get sense data if called by format 28848fd57520SJan Höppner * check 28858fd57520SJan Höppner */ 28868fd57520SJan Höppner if (fmt_buffer && irb) { 28878fd57520SJan Höppner sense = dasd_get_sense(&cqr->irb); 28888fd57520SJan Höppner memcpy(irb, &cqr->irb, sizeof(*irb)); 28898fd57520SJan Höppner } 2890d42e1712SStefan Haberland rc = -EIO; 28918fd57520SJan Höppner } 2892d42e1712SStefan Haberland list_del_init(&cqr->blocklist); 28935e2b17e7SJan Höppner dasd_ffree_request(cqr, device); 2894d42e1712SStefan Haberland private->count--; 2895d42e1712SStefan Haberland } 2896d42e1712SStefan Haberland 28978fd57520SJan Höppner if (rc && rc != -EIO) 289846d1c03cSJan Höppner goto out; 28998fd57520SJan Höppner if (rc == -EIO) { 29008fd57520SJan Höppner /* 29018fd57520SJan Höppner * In case fewer than the expected records are on the 29028fd57520SJan Höppner * track, we will most likely get a 'No Record Found' 29038fd57520SJan Höppner * error (in command mode) or a 'File Protected' error 29048fd57520SJan Höppner * (in transport mode). Those particular cases shouldn't 29058fd57520SJan Höppner * pass the -EIO to the IOCTL, therefore reset the rc 29068fd57520SJan Höppner * and continue. 29078fd57520SJan Höppner */ 29088fd57520SJan Höppner if (sense && 29098fd57520SJan Höppner (sense[1] & SNS1_NO_REC_FOUND || 29108fd57520SJan Höppner sense[1] & SNS1_FILE_PROTECTED)) 29118fd57520SJan Höppner retry = 1; 29128fd57520SJan Höppner else 29138fd57520SJan Höppner goto out; 29148fd57520SJan Höppner } 291529b8dd9dSStefan Haberland 291646d1c03cSJan Höppner } while (retry); 291746d1c03cSJan Höppner 291846d1c03cSJan Höppner out: 291946d1c03cSJan Höppner fdata->start_unit = old_start; 292046d1c03cSJan Höppner fdata->stop_unit = old_stop; 2921d42e1712SStefan Haberland 2922d42e1712SStefan Haberland return rc; 2923d42e1712SStefan Haberland } 2924d42e1712SStefan Haberland 2925570d237cSJan Höppner static int dasd_eckd_format_device(struct dasd_device *base, 2926570d237cSJan Höppner struct format_data_t *fdata, int enable_pav) 2927570d237cSJan Höppner { 29288fd57520SJan Höppner return dasd_eckd_format_process_data(base, fdata, enable_pav, 0, NULL, 29298fd57520SJan Höppner 0, NULL); 29308fd57520SJan Höppner } 29318fd57520SJan Höppner 29328fd57520SJan Höppner /* 29335e2b17e7SJan Höppner * Callback function to free ESE format requests. 29345e2b17e7SJan Höppner */ 29355e2b17e7SJan Höppner static void dasd_eckd_ese_format_cb(struct dasd_ccw_req *cqr, void *data) 29365e2b17e7SJan Höppner { 29375e2b17e7SJan Höppner struct dasd_device *device = cqr->startdev; 29385e2b17e7SJan Höppner struct dasd_eckd_private *private = device->private; 29395e2b17e7SJan Höppner 29405e2b17e7SJan Höppner private->count--; 29415e2b17e7SJan Höppner dasd_ffree_request(cqr, device); 29425e2b17e7SJan Höppner } 29435e2b17e7SJan Höppner 29445e2b17e7SJan Höppner static struct dasd_ccw_req * 29455e2b17e7SJan Höppner dasd_eckd_ese_format(struct dasd_device *startdev, struct dasd_ccw_req *cqr) 29465e2b17e7SJan Höppner { 29475e2b17e7SJan Höppner struct dasd_eckd_private *private; 29485e2b17e7SJan Höppner struct format_data_t fdata; 29495e2b17e7SJan Höppner unsigned int recs_per_trk; 29505e2b17e7SJan Höppner struct dasd_ccw_req *fcqr; 29515e2b17e7SJan Höppner struct dasd_device *base; 29525e2b17e7SJan Höppner struct dasd_block *block; 29535e2b17e7SJan Höppner unsigned int blksize; 29545e2b17e7SJan Höppner struct request *req; 29555e2b17e7SJan Höppner sector_t first_trk; 29565e2b17e7SJan Höppner sector_t last_trk; 29575e2b17e7SJan Höppner int rc; 29585e2b17e7SJan Höppner 29595e2b17e7SJan Höppner req = cqr->callback_data; 29605e2b17e7SJan Höppner base = cqr->block->base; 29615e2b17e7SJan Höppner private = base->private; 29625e2b17e7SJan Höppner block = base->block; 29635e2b17e7SJan Höppner blksize = block->bp_block; 29645e2b17e7SJan Höppner recs_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 29655e2b17e7SJan Höppner 29665e2b17e7SJan Höppner first_trk = blk_rq_pos(req) >> block->s2b_shift; 29675e2b17e7SJan Höppner sector_div(first_trk, recs_per_trk); 29685e2b17e7SJan Höppner last_trk = 29695e2b17e7SJan Höppner (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 29705e2b17e7SJan Höppner sector_div(last_trk, recs_per_trk); 29715e2b17e7SJan Höppner 29725e2b17e7SJan Höppner fdata.start_unit = first_trk; 29735e2b17e7SJan Höppner fdata.stop_unit = last_trk; 29745e2b17e7SJan Höppner fdata.blksize = blksize; 29755e2b17e7SJan Höppner fdata.intensity = private->uses_cdl ? DASD_FMT_INT_COMPAT : 0; 29765e2b17e7SJan Höppner 29775e2b17e7SJan Höppner rc = dasd_eckd_format_sanity_checks(base, &fdata); 29785e2b17e7SJan Höppner if (rc) 29795e2b17e7SJan Höppner return ERR_PTR(-EINVAL); 29805e2b17e7SJan Höppner 29815e2b17e7SJan Höppner /* 29825e2b17e7SJan Höppner * We're building the request with PAV disabled as we're reusing 29835e2b17e7SJan Höppner * the former startdev. 29845e2b17e7SJan Höppner */ 29855e2b17e7SJan Höppner fcqr = dasd_eckd_build_format(base, startdev, &fdata, 0); 29865e2b17e7SJan Höppner if (IS_ERR(fcqr)) 29875e2b17e7SJan Höppner return fcqr; 29885e2b17e7SJan Höppner 29895e2b17e7SJan Höppner fcqr->callback = dasd_eckd_ese_format_cb; 29905e2b17e7SJan Höppner 29915e2b17e7SJan Höppner return fcqr; 29925e2b17e7SJan Höppner } 29935e2b17e7SJan Höppner 29945e2b17e7SJan Höppner /* 29955e2b17e7SJan Höppner * When data is read from an unformatted area of an ESE volume, this function 29965e2b17e7SJan Höppner * returns zeroed data and thereby mimics a read of zero data. 29975e2b17e7SJan Höppner */ 29985e2b17e7SJan Höppner static void dasd_eckd_ese_read(struct dasd_ccw_req *cqr) 29995e2b17e7SJan Höppner { 30005e2b17e7SJan Höppner unsigned int blksize, off; 30015e2b17e7SJan Höppner struct dasd_device *base; 30025e2b17e7SJan Höppner struct req_iterator iter; 30035e2b17e7SJan Höppner struct request *req; 30045e2b17e7SJan Höppner struct bio_vec bv; 30055e2b17e7SJan Höppner char *dst; 30065e2b17e7SJan Höppner 30075e2b17e7SJan Höppner req = (struct request *) cqr->callback_data; 30085e2b17e7SJan Höppner base = cqr->block->base; 30095e2b17e7SJan Höppner blksize = base->block->bp_block; 30105e2b17e7SJan Höppner 30115e2b17e7SJan Höppner rq_for_each_segment(bv, req, iter) { 30125e2b17e7SJan Höppner dst = page_address(bv.bv_page) + bv.bv_offset; 30135e2b17e7SJan Höppner for (off = 0; off < bv.bv_len; off += blksize) { 30145e2b17e7SJan Höppner if (dst && rq_data_dir(req) == READ) { 30155e2b17e7SJan Höppner dst += off; 30165e2b17e7SJan Höppner memset(dst, 0, blksize); 30175e2b17e7SJan Höppner } 30185e2b17e7SJan Höppner } 30195e2b17e7SJan Höppner } 30205e2b17e7SJan Höppner } 30215e2b17e7SJan Höppner 30225e2b17e7SJan Höppner /* 30238fd57520SJan Höppner * Helper function to count consecutive records of a single track. 30248fd57520SJan Höppner */ 30258fd57520SJan Höppner static int dasd_eckd_count_records(struct eckd_count *fmt_buffer, int start, 30268fd57520SJan Höppner int max) 30278fd57520SJan Höppner { 30288fd57520SJan Höppner int head; 30298fd57520SJan Höppner int i; 30308fd57520SJan Höppner 30318fd57520SJan Höppner head = fmt_buffer[start].head; 30328fd57520SJan Höppner 30338fd57520SJan Höppner /* 30348fd57520SJan Höppner * There are 3 conditions where we stop counting: 30358fd57520SJan Höppner * - if data reoccurs (same head and record may reoccur), which may 30368fd57520SJan Höppner * happen due to the way DASD_ECKD_CCW_READ_COUNT works 30378fd57520SJan Höppner * - when the head changes, because we're iterating over several tracks 30388fd57520SJan Höppner * then (DASD_ECKD_CCW_READ_COUNT_MT) 30398fd57520SJan Höppner * - when we've reached the end of sensible data in the buffer (the 30408fd57520SJan Höppner * record will be 0 then) 30418fd57520SJan Höppner */ 30428fd57520SJan Höppner for (i = start; i < max; i++) { 30438fd57520SJan Höppner if (i > start) { 30448fd57520SJan Höppner if ((fmt_buffer[i].head == head && 30458fd57520SJan Höppner fmt_buffer[i].record == 1) || 30468fd57520SJan Höppner fmt_buffer[i].head != head || 30478fd57520SJan Höppner fmt_buffer[i].record == 0) 30488fd57520SJan Höppner break; 30498fd57520SJan Höppner } 30508fd57520SJan Höppner } 30518fd57520SJan Höppner 30528fd57520SJan Höppner return i - start; 30538fd57520SJan Höppner } 30548fd57520SJan Höppner 30558fd57520SJan Höppner /* 30568fd57520SJan Höppner * Evaluate a given range of tracks. Data like number of records, blocksize, 30578fd57520SJan Höppner * record ids, and key length are compared with expected data. 30588fd57520SJan Höppner * 30598fd57520SJan Höppner * If a mismatch occurs, the corresponding error bit is set, as well as 30608fd57520SJan Höppner * additional information, depending on the error. 30618fd57520SJan Höppner */ 30628fd57520SJan Höppner static void dasd_eckd_format_evaluate_tracks(struct eckd_count *fmt_buffer, 30638fd57520SJan Höppner struct format_check_t *cdata, 30648fd57520SJan Höppner int rpt_max, int rpt_exp, 30658fd57520SJan Höppner int trk_per_cyl, int tpm) 30668fd57520SJan Höppner { 30678fd57520SJan Höppner struct ch_t geo; 30688fd57520SJan Höppner int max_entries; 30698fd57520SJan Höppner int count = 0; 30708fd57520SJan Höppner int trkcount; 30718fd57520SJan Höppner int blksize; 30728fd57520SJan Höppner int pos = 0; 30738fd57520SJan Höppner int i, j; 30748fd57520SJan Höppner int kl; 30758fd57520SJan Höppner 30768fd57520SJan Höppner trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; 30778fd57520SJan Höppner max_entries = trkcount * rpt_max; 30788fd57520SJan Höppner 30798fd57520SJan Höppner for (i = cdata->expect.start_unit; i <= cdata->expect.stop_unit; i++) { 30808fd57520SJan Höppner /* Calculate the correct next starting position in the buffer */ 30818fd57520SJan Höppner if (tpm) { 30828fd57520SJan Höppner while (fmt_buffer[pos].record == 0 && 30838fd57520SJan Höppner fmt_buffer[pos].dl == 0) { 30848fd57520SJan Höppner if (pos++ > max_entries) 30858fd57520SJan Höppner break; 30868fd57520SJan Höppner } 30878fd57520SJan Höppner } else { 30888fd57520SJan Höppner if (i != cdata->expect.start_unit) 30898fd57520SJan Höppner pos += rpt_max - count; 30908fd57520SJan Höppner } 30918fd57520SJan Höppner 30928fd57520SJan Höppner /* Calculate the expected geo values for the current track */ 30938fd57520SJan Höppner set_ch_t(&geo, i / trk_per_cyl, i % trk_per_cyl); 30948fd57520SJan Höppner 30958fd57520SJan Höppner /* Count and check number of records */ 30968fd57520SJan Höppner count = dasd_eckd_count_records(fmt_buffer, pos, pos + rpt_max); 30978fd57520SJan Höppner 30988fd57520SJan Höppner if (count < rpt_exp) { 30998fd57520SJan Höppner cdata->result = DASD_FMT_ERR_TOO_FEW_RECORDS; 31008fd57520SJan Höppner break; 31018fd57520SJan Höppner } 31028fd57520SJan Höppner if (count > rpt_exp) { 31038fd57520SJan Höppner cdata->result = DASD_FMT_ERR_TOO_MANY_RECORDS; 31048fd57520SJan Höppner break; 31058fd57520SJan Höppner } 31068fd57520SJan Höppner 31078fd57520SJan Höppner for (j = 0; j < count; j++, pos++) { 31088fd57520SJan Höppner blksize = cdata->expect.blksize; 31098fd57520SJan Höppner kl = 0; 31108fd57520SJan Höppner 31118fd57520SJan Höppner /* 31128fd57520SJan Höppner * Set special values when checking CDL formatted 31138fd57520SJan Höppner * devices. 31148fd57520SJan Höppner */ 31158fd57520SJan Höppner if ((cdata->expect.intensity & 0x08) && 31168fd57520SJan Höppner geo.cyl == 0 && geo.head == 0) { 31178fd57520SJan Höppner if (j < 3) { 31188fd57520SJan Höppner blksize = sizes_trk0[j] - 4; 31198fd57520SJan Höppner kl = 4; 31208fd57520SJan Höppner } 31218fd57520SJan Höppner } 31228fd57520SJan Höppner if ((cdata->expect.intensity & 0x08) && 31238fd57520SJan Höppner geo.cyl == 0 && geo.head == 1) { 31248fd57520SJan Höppner blksize = LABEL_SIZE - 44; 31258fd57520SJan Höppner kl = 44; 31268fd57520SJan Höppner } 31278fd57520SJan Höppner 31288fd57520SJan Höppner /* Check blocksize */ 31298fd57520SJan Höppner if (fmt_buffer[pos].dl != blksize) { 31308fd57520SJan Höppner cdata->result = DASD_FMT_ERR_BLKSIZE; 31318fd57520SJan Höppner goto out; 31328fd57520SJan Höppner } 31338fd57520SJan Höppner /* Check if key length is 0 */ 31348fd57520SJan Höppner if (fmt_buffer[pos].kl != kl) { 31358fd57520SJan Höppner cdata->result = DASD_FMT_ERR_KEY_LENGTH; 31368fd57520SJan Höppner goto out; 31378fd57520SJan Höppner } 31388fd57520SJan Höppner /* Check if record_id is correct */ 31398fd57520SJan Höppner if (fmt_buffer[pos].cyl != geo.cyl || 31408fd57520SJan Höppner fmt_buffer[pos].head != geo.head || 31418fd57520SJan Höppner fmt_buffer[pos].record != (j + 1)) { 31428fd57520SJan Höppner cdata->result = DASD_FMT_ERR_RECORD_ID; 31438fd57520SJan Höppner goto out; 31448fd57520SJan Höppner } 31458fd57520SJan Höppner } 31468fd57520SJan Höppner } 31478fd57520SJan Höppner 31488fd57520SJan Höppner out: 31498fd57520SJan Höppner /* 31508fd57520SJan Höppner * In case of no errors, we need to decrease by one 31518fd57520SJan Höppner * to get the correct positions. 31528fd57520SJan Höppner */ 31538fd57520SJan Höppner if (!cdata->result) { 31548fd57520SJan Höppner i--; 31558fd57520SJan Höppner pos--; 31568fd57520SJan Höppner } 31578fd57520SJan Höppner 31588fd57520SJan Höppner cdata->unit = i; 31598fd57520SJan Höppner cdata->num_records = count; 31608fd57520SJan Höppner cdata->rec = fmt_buffer[pos].record; 31618fd57520SJan Höppner cdata->blksize = fmt_buffer[pos].dl; 31628fd57520SJan Höppner cdata->key_length = fmt_buffer[pos].kl; 31638fd57520SJan Höppner } 31648fd57520SJan Höppner 31658fd57520SJan Höppner /* 31668fd57520SJan Höppner * Check the format of a range of tracks of a DASD. 31678fd57520SJan Höppner */ 31688fd57520SJan Höppner static int dasd_eckd_check_device_format(struct dasd_device *base, 31698fd57520SJan Höppner struct format_check_t *cdata, 31708fd57520SJan Höppner int enable_pav) 31718fd57520SJan Höppner { 31728fd57520SJan Höppner struct dasd_eckd_private *private = base->private; 31738fd57520SJan Höppner struct eckd_count *fmt_buffer; 31748fd57520SJan Höppner struct irb irb; 31758fd57520SJan Höppner int rpt_max, rpt_exp; 31768fd57520SJan Höppner int fmt_buffer_size; 31778fd57520SJan Höppner int trk_per_cyl; 31788fd57520SJan Höppner int trkcount; 31798fd57520SJan Höppner int tpm = 0; 31808fd57520SJan Höppner int rc; 31818fd57520SJan Höppner 31828fd57520SJan Höppner trk_per_cyl = private->rdc_data.trk_per_cyl; 31838fd57520SJan Höppner 31848fd57520SJan Höppner /* Get maximum and expected amount of records per track */ 31858fd57520SJan Höppner rpt_max = recs_per_track(&private->rdc_data, 0, 512) + 1; 31868fd57520SJan Höppner rpt_exp = recs_per_track(&private->rdc_data, 0, cdata->expect.blksize); 31878fd57520SJan Höppner 31888fd57520SJan Höppner trkcount = cdata->expect.stop_unit - cdata->expect.start_unit + 1; 31898fd57520SJan Höppner fmt_buffer_size = trkcount * rpt_max * sizeof(struct eckd_count); 31908fd57520SJan Höppner 31918fd57520SJan Höppner fmt_buffer = kzalloc(fmt_buffer_size, GFP_KERNEL | GFP_DMA); 31928fd57520SJan Höppner if (!fmt_buffer) 31938fd57520SJan Höppner return -ENOMEM; 31948fd57520SJan Höppner 31958fd57520SJan Höppner /* 31968fd57520SJan Höppner * A certain FICON feature subset is needed to operate in transport 31978fd57520SJan Höppner * mode. Additionally, the support for transport mode is implicitly 31988fd57520SJan Höppner * checked by comparing the buffer size with fcx_max_data. As long as 31998fd57520SJan Höppner * the buffer size is smaller we can operate in transport mode and 32008fd57520SJan Höppner * process multiple tracks. If not, only one track at once is being 32018fd57520SJan Höppner * processed using command mode. 32028fd57520SJan Höppner */ 32038fd57520SJan Höppner if ((private->features.feature[40] & 0x04) && 32048fd57520SJan Höppner fmt_buffer_size <= private->fcx_max_data) 32058fd57520SJan Höppner tpm = 1; 32068fd57520SJan Höppner 32078fd57520SJan Höppner rc = dasd_eckd_format_process_data(base, &cdata->expect, enable_pav, 32088fd57520SJan Höppner tpm, fmt_buffer, rpt_max, &irb); 32098fd57520SJan Höppner if (rc && rc != -EIO) 32108fd57520SJan Höppner goto out; 32118fd57520SJan Höppner if (rc == -EIO) { 32128fd57520SJan Höppner /* 32138fd57520SJan Höppner * If our first attempt with transport mode enabled comes back 32148fd57520SJan Höppner * with an incorrect length error, we're going to retry the 32158fd57520SJan Höppner * check with command mode. 32168fd57520SJan Höppner */ 32178fd57520SJan Höppner if (tpm && scsw_cstat(&irb.scsw) == 0x40) { 32188fd57520SJan Höppner tpm = 0; 32198fd57520SJan Höppner rc = dasd_eckd_format_process_data(base, &cdata->expect, 32208fd57520SJan Höppner enable_pav, tpm, 32218fd57520SJan Höppner fmt_buffer, rpt_max, 32228fd57520SJan Höppner &irb); 32238fd57520SJan Höppner if (rc) 32248fd57520SJan Höppner goto out; 32258fd57520SJan Höppner } else { 32268fd57520SJan Höppner goto out; 32278fd57520SJan Höppner } 32288fd57520SJan Höppner } 32298fd57520SJan Höppner 32308fd57520SJan Höppner dasd_eckd_format_evaluate_tracks(fmt_buffer, cdata, rpt_max, rpt_exp, 32318fd57520SJan Höppner trk_per_cyl, tpm); 32328fd57520SJan Höppner 32338fd57520SJan Höppner out: 32348fd57520SJan Höppner kfree(fmt_buffer); 32358fd57520SJan Höppner 32368fd57520SJan Höppner return rc; 3237570d237cSJan Höppner } 3238570d237cSJan Höppner 32398e09f215SStefan Weinhuber static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr) 32401da177e4SLinus Torvalds { 3241a2ace466SHannes Reinecke if (cqr->retries < 0) { 3242a2ace466SHannes Reinecke cqr->status = DASD_CQR_FAILED; 3243a2ace466SHannes Reinecke return; 3244a2ace466SHannes Reinecke } 32458e09f215SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 32468e09f215SStefan Weinhuber if (cqr->block && (cqr->startdev != cqr->block->base)) { 32478e09f215SStefan Weinhuber dasd_eckd_reset_ccw_to_base_io(cqr); 32488e09f215SStefan Weinhuber cqr->startdev = cqr->block->base; 3249c9346151SStefan Haberland cqr->lpm = dasd_path_get_opm(cqr->block->base); 32501da177e4SLinus Torvalds } 32518e09f215SStefan Weinhuber }; 32521da177e4SLinus Torvalds 32531da177e4SLinus Torvalds static dasd_erp_fn_t 32541da177e4SLinus Torvalds dasd_eckd_erp_action(struct dasd_ccw_req * cqr) 32551da177e4SLinus Torvalds { 32568e09f215SStefan Weinhuber struct dasd_device *device = (struct dasd_device *) cqr->startdev; 32571da177e4SLinus Torvalds struct ccw_device *cdev = device->cdev; 32581da177e4SLinus Torvalds 32591da177e4SLinus Torvalds switch (cdev->id.cu_type) { 32601da177e4SLinus Torvalds case 0x3990: 32611da177e4SLinus Torvalds case 0x2105: 32621da177e4SLinus Torvalds case 0x2107: 32631da177e4SLinus Torvalds case 0x1750: 32641da177e4SLinus Torvalds return dasd_3990_erp_action; 32651da177e4SLinus Torvalds case 0x9343: 32661da177e4SLinus Torvalds case 0x3880: 32671da177e4SLinus Torvalds default: 32681da177e4SLinus Torvalds return dasd_default_erp_action; 32691da177e4SLinus Torvalds } 32701da177e4SLinus Torvalds } 32711da177e4SLinus Torvalds 32721da177e4SLinus Torvalds static dasd_erp_fn_t 32731da177e4SLinus Torvalds dasd_eckd_erp_postaction(struct dasd_ccw_req * cqr) 32741da177e4SLinus Torvalds { 32751da177e4SLinus Torvalds return dasd_default_erp_postaction; 32761da177e4SLinus Torvalds } 32771da177e4SLinus Torvalds 32785a27e60dSStefan Weinhuber static void dasd_eckd_check_for_device_change(struct dasd_device *device, 32795a27e60dSStefan Weinhuber struct dasd_ccw_req *cqr, 32808e09f215SStefan Weinhuber struct irb *irb) 32818e09f215SStefan Weinhuber { 32828e09f215SStefan Weinhuber char mask; 3283f3eb5384SStefan Weinhuber char *sense = NULL; 3284543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 32858e09f215SStefan Weinhuber 32868e09f215SStefan Weinhuber /* first of all check for state change pending interrupt */ 32878e09f215SStefan Weinhuber mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP; 3288f3eb5384SStefan Weinhuber if ((scsw_dstat(&irb->scsw) & mask) == mask) { 3289c8d1c0ffSStefan Haberland /* 3290c8d1c0ffSStefan Haberland * for alias only, not in offline processing 3291c8d1c0ffSStefan Haberland * and only if not suspended 3292c8d1c0ffSStefan Haberland */ 3293501183f2SStefan Haberland if (!device->block && private->lcu && 329425e2cf1cSStefan Haberland device->state == DASD_STATE_ONLINE && 3295c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_OFFLINE, &device->flags) && 3296c8d1c0ffSStefan Haberland !test_bit(DASD_FLAG_SUSPENDED, &device->flags)) { 3297501183f2SStefan Haberland /* schedule worker to reload device */ 3298501183f2SStefan Haberland dasd_reload_device(device); 3299501183f2SStefan Haberland } 33008e09f215SStefan Weinhuber dasd_generic_handle_state_change(device); 33018e09f215SStefan Weinhuber return; 33028e09f215SStefan Weinhuber } 33038e09f215SStefan Weinhuber 3304a5a0061fSStefan Weinhuber sense = dasd_get_sense(irb); 33055a27e60dSStefan Weinhuber if (!sense) 33065a27e60dSStefan Weinhuber return; 33075a27e60dSStefan Weinhuber 33085a27e60dSStefan Weinhuber /* summary unit check */ 3309c7a29e56SStefan Weinhuber if ((sense[27] & DASD_SENSE_BIT_0) && (sense[7] == 0x0D) && 3310a5a0061fSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK)) { 331159a9ed5fSStefan Haberland if (test_and_set_bit(DASD_FLAG_SUC, &device->flags)) { 331259a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 331359a9ed5fSStefan Haberland "eckd suc: device already notified"); 331459a9ed5fSStefan Haberland return; 331559a9ed5fSStefan Haberland } 331659a9ed5fSStefan Haberland sense = dasd_get_sense(irb); 331759a9ed5fSStefan Haberland if (!sense) { 331859a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 331959a9ed5fSStefan Haberland "eckd suc: no reason code available"); 332059a9ed5fSStefan Haberland clear_bit(DASD_FLAG_SUC, &device->flags); 332159a9ed5fSStefan Haberland return; 332259a9ed5fSStefan Haberland 332359a9ed5fSStefan Haberland } 332459a9ed5fSStefan Haberland private->suc_reason = sense[8]; 332559a9ed5fSStefan Haberland DBF_DEV_EVENT(DBF_NOTICE, device, "%s %x", 332659a9ed5fSStefan Haberland "eckd handle summary unit check: reason", 332759a9ed5fSStefan Haberland private->suc_reason); 332859a9ed5fSStefan Haberland dasd_get_device(device); 332959a9ed5fSStefan Haberland if (!schedule_work(&device->suc_work)) 333059a9ed5fSStefan Haberland dasd_put_device(device); 333159a9ed5fSStefan Haberland 33328e09f215SStefan Weinhuber return; 33338e09f215SStefan Weinhuber } 33348e09f215SStefan Weinhuber 3335f60c768cSStefan Haberland /* service information message SIM */ 33365a27e60dSStefan Weinhuber if (!cqr && !(sense[27] & DASD_SENSE_BIT_0) && 3337f3eb5384SStefan Weinhuber ((sense[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) { 3338f3eb5384SStefan Weinhuber dasd_3990_erp_handle_sim(device, sense); 3339f60c768cSStefan Haberland return; 3340f60c768cSStefan Haberland } 3341f60c768cSStefan Haberland 33425a27e60dSStefan Weinhuber /* loss of device reservation is handled via base devices only 33435a27e60dSStefan Weinhuber * as alias devices may be used with several bases 33445a27e60dSStefan Weinhuber */ 3345c7a29e56SStefan Weinhuber if (device->block && (sense[27] & DASD_SENSE_BIT_0) && 3346c7a29e56SStefan Weinhuber (sense[7] == 0x3F) && 33475a27e60dSStefan Weinhuber (scsw_dstat(&irb->scsw) & DEV_STAT_UNIT_CHECK) && 33485a27e60dSStefan Weinhuber test_bit(DASD_FLAG_IS_RESERVED, &device->flags)) { 33495a27e60dSStefan Weinhuber if (device->features & DASD_FEATURE_FAILONSLCK) 33505a27e60dSStefan Weinhuber set_bit(DASD_FLAG_LOCK_STOLEN, &device->flags); 33515a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 33525a27e60dSStefan Weinhuber dev_err(&device->cdev->dev, 33535a27e60dSStefan Weinhuber "The device reservation was lost\n"); 3354ada3df91SStefan Haberland } 33555a27e60dSStefan Weinhuber } 3356f3eb5384SStefan Weinhuber 3357f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single( 3358f3eb5384SStefan Weinhuber struct dasd_device *startdev, 33598e09f215SStefan Weinhuber struct dasd_block *block, 3360f3eb5384SStefan Weinhuber struct request *req, 3361f3eb5384SStefan Weinhuber sector_t first_rec, 3362f3eb5384SStefan Weinhuber sector_t last_rec, 3363f3eb5384SStefan Weinhuber sector_t first_trk, 3364f3eb5384SStefan Weinhuber sector_t last_trk, 3365f3eb5384SStefan Weinhuber unsigned int first_offs, 3366f3eb5384SStefan Weinhuber unsigned int last_offs, 3367f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 3368f3eb5384SStefan Weinhuber unsigned int blksize) 33691da177e4SLinus Torvalds { 33701da177e4SLinus Torvalds struct dasd_eckd_private *private; 33711da177e4SLinus Torvalds unsigned long *idaws; 33721da177e4SLinus Torvalds struct LO_eckd_data *LO_data; 33731da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 33741da177e4SLinus Torvalds struct ccw1 *ccw; 33755705f702SNeilBrown struct req_iterator iter; 33767988613bSKent Overstreet struct bio_vec bv; 33771da177e4SLinus Torvalds char *dst; 3378f3eb5384SStefan Weinhuber unsigned int off; 33791da177e4SLinus Torvalds int count, cidaw, cplength, datasize; 3380f3eb5384SStefan Weinhuber sector_t recid; 33811da177e4SLinus Torvalds unsigned char cmd, rcmd; 33828e09f215SStefan Weinhuber int use_prefix; 33838e09f215SStefan Weinhuber struct dasd_device *basedev; 33841da177e4SLinus Torvalds 33858e09f215SStefan Weinhuber basedev = block->base; 3386543691a4SSebastian Ott private = basedev->private; 33871da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 33881da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_READ_MT; 33891da177e4SLinus Torvalds else if (rq_data_dir(req) == WRITE) 33901da177e4SLinus Torvalds cmd = DASD_ECKD_CCW_WRITE_MT; 33911da177e4SLinus Torvalds else 33921da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 3393f3eb5384SStefan Weinhuber 33941da177e4SLinus Torvalds /* Check struct bio and count the number of blocks for the request. */ 33951da177e4SLinus Torvalds count = 0; 33961da177e4SLinus Torvalds cidaw = 0; 33975705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 33987988613bSKent Overstreet if (bv.bv_len & (blksize - 1)) 33991da177e4SLinus Torvalds /* Eckd can only do full blocks. */ 34001da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 34017988613bSKent Overstreet count += bv.bv_len >> (block->s2b_shift + 9); 34027988613bSKent Overstreet if (idal_is_needed (page_address(bv.bv_page), bv.bv_len)) 34037988613bSKent Overstreet cidaw += bv.bv_len >> (block->s2b_shift + 9); 34041da177e4SLinus Torvalds } 34051da177e4SLinus Torvalds /* Paranoia. */ 34061da177e4SLinus Torvalds if (count != last_rec - first_rec + 1) 34071da177e4SLinus Torvalds return ERR_PTR(-EINVAL); 34088e09f215SStefan Weinhuber 34098e09f215SStefan Weinhuber /* use the prefix command if available */ 34108e09f215SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 34118e09f215SStefan Weinhuber if (use_prefix) { 34128e09f215SStefan Weinhuber /* 1x prefix + number of blocks */ 34138e09f215SStefan Weinhuber cplength = 2 + count; 34148e09f215SStefan Weinhuber /* 1x prefix + cidaws*sizeof(long) */ 34158e09f215SStefan Weinhuber datasize = sizeof(struct PFX_eckd_data) + 34168e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 34178e09f215SStefan Weinhuber cidaw * sizeof(unsigned long); 34188e09f215SStefan Weinhuber } else { 34191da177e4SLinus Torvalds /* 1x define extent + 1x locate record + number of blocks */ 34201da177e4SLinus Torvalds cplength = 2 + count; 34211da177e4SLinus Torvalds /* 1x define extent + 1x locate record + cidaws*sizeof(long) */ 34228e09f215SStefan Weinhuber datasize = sizeof(struct DE_eckd_data) + 34238e09f215SStefan Weinhuber sizeof(struct LO_eckd_data) + 34241da177e4SLinus Torvalds cidaw * sizeof(unsigned long); 34258e09f215SStefan Weinhuber } 34261da177e4SLinus Torvalds /* Find out the number of additional locate record ccws for cdl. */ 34271da177e4SLinus Torvalds if (private->uses_cdl && first_rec < 2*blk_per_trk) { 34281da177e4SLinus Torvalds if (last_rec >= 2*blk_per_trk) 34291da177e4SLinus Torvalds count = 2*blk_per_trk - first_rec; 34301da177e4SLinus Torvalds cplength += count; 34311da177e4SLinus Torvalds datasize += count*sizeof(struct LO_eckd_data); 34321da177e4SLinus Torvalds } 34331da177e4SLinus Torvalds /* Allocate the ccw request. */ 343468b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 3435c5205f2fSSebastian Ott startdev, blk_mq_rq_to_pdu(req)); 34361da177e4SLinus Torvalds if (IS_ERR(cqr)) 34371da177e4SLinus Torvalds return cqr; 34381da177e4SLinus Torvalds ccw = cqr->cpaddr; 34398e09f215SStefan Weinhuber /* First ccw is define extent or prefix. */ 34408e09f215SStefan Weinhuber if (use_prefix) { 34418e09f215SStefan Weinhuber if (prefix(ccw++, cqr->data, first_trk, 34428e09f215SStefan Weinhuber last_trk, cmd, basedev, startdev) == -EAGAIN) { 34438e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 34448e09f215SStefan Weinhuber * Try again later. 34458e09f215SStefan Weinhuber */ 34468e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 3447d54853efSMartin Schwidefsky return ERR_PTR(-EAGAIN); 3448d54853efSMartin Schwidefsky } 34498e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 34508e09f215SStefan Weinhuber sizeof(struct PFX_eckd_data)); 34518e09f215SStefan Weinhuber } else { 34528e09f215SStefan Weinhuber if (define_extent(ccw++, cqr->data, first_trk, 345345f186beSJan Höppner last_trk, cmd, basedev, 0) == -EAGAIN) { 34548e09f215SStefan Weinhuber /* Clock not in sync and XRC is enabled. 34558e09f215SStefan Weinhuber * Try again later. 34568e09f215SStefan Weinhuber */ 34578e09f215SStefan Weinhuber dasd_sfree_request(cqr, startdev); 34588e09f215SStefan Weinhuber return ERR_PTR(-EAGAIN); 34598e09f215SStefan Weinhuber } 34608e09f215SStefan Weinhuber idaws = (unsigned long *) (cqr->data + 34618e09f215SStefan Weinhuber sizeof(struct DE_eckd_data)); 34628e09f215SStefan Weinhuber } 34631da177e4SLinus Torvalds /* Build locate_record+read/write/ccws. */ 34641da177e4SLinus Torvalds LO_data = (struct LO_eckd_data *) (idaws + cidaw); 34651da177e4SLinus Torvalds recid = first_rec; 34661da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) { 34671da177e4SLinus Torvalds /* Only standard blocks so there is just one locate record. */ 34681da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 34691da177e4SLinus Torvalds locate_record(ccw++, LO_data++, first_trk, first_offs + 1, 34708e09f215SStefan Weinhuber last_rec - recid + 1, cmd, basedev, blksize); 34711da177e4SLinus Torvalds } 34725705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 34737988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 34741da177e4SLinus Torvalds if (dasd_page_cache) { 34751da177e4SLinus Torvalds char *copy = kmem_cache_alloc(dasd_page_cache, 3476441e143eSChristoph Lameter GFP_DMA | __GFP_NOWARN); 34771da177e4SLinus Torvalds if (copy && rq_data_dir(req) == WRITE) 34787988613bSKent Overstreet memcpy(copy + bv.bv_offset, dst, bv.bv_len); 34791da177e4SLinus Torvalds if (copy) 34807988613bSKent Overstreet dst = copy + bv.bv_offset; 34811da177e4SLinus Torvalds } 34827988613bSKent Overstreet for (off = 0; off < bv.bv_len; off += blksize) { 34831da177e4SLinus Torvalds sector_t trkid = recid; 34841da177e4SLinus Torvalds unsigned int recoffs = sector_div(trkid, blk_per_trk); 34851da177e4SLinus Torvalds rcmd = cmd; 34861da177e4SLinus Torvalds count = blksize; 34871da177e4SLinus Torvalds /* Locate record for cdl special block ? */ 34881da177e4SLinus Torvalds if (private->uses_cdl && recid < 2*blk_per_trk) { 34891da177e4SLinus Torvalds if (dasd_eckd_cdl_special(blk_per_trk, recid)){ 34901da177e4SLinus Torvalds rcmd |= 0x8; 34911da177e4SLinus Torvalds count = dasd_eckd_cdl_reclen(recid); 3492ec5883abSHorst Hummel if (count < blksize && 3493ec5883abSHorst Hummel rq_data_dir(req) == READ) 34941da177e4SLinus Torvalds memset(dst + count, 0xe5, 34951da177e4SLinus Torvalds blksize - count); 34961da177e4SLinus Torvalds } 34971da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 34981da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 34991da177e4SLinus Torvalds trkid, recoffs + 1, 35008e09f215SStefan Weinhuber 1, rcmd, basedev, count); 35011da177e4SLinus Torvalds } 35021da177e4SLinus Torvalds /* Locate record for standard blocks ? */ 35031da177e4SLinus Torvalds if (private->uses_cdl && recid == 2*blk_per_trk) { 35041da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 35051da177e4SLinus Torvalds locate_record(ccw++, LO_data++, 35061da177e4SLinus Torvalds trkid, recoffs + 1, 35071da177e4SLinus Torvalds last_rec - recid + 1, 35088e09f215SStefan Weinhuber cmd, basedev, count); 35091da177e4SLinus Torvalds } 35101da177e4SLinus Torvalds /* Read/write ccw. */ 35111da177e4SLinus Torvalds ccw[-1].flags |= CCW_FLAG_CC; 35121da177e4SLinus Torvalds ccw->cmd_code = rcmd; 35131da177e4SLinus Torvalds ccw->count = count; 35141da177e4SLinus Torvalds if (idal_is_needed(dst, blksize)) { 35151da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) idaws; 35161da177e4SLinus Torvalds ccw->flags = CCW_FLAG_IDA; 35171da177e4SLinus Torvalds idaws = idal_create_words(idaws, dst, blksize); 35181da177e4SLinus Torvalds } else { 35191da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) dst; 35201da177e4SLinus Torvalds ccw->flags = 0; 35211da177e4SLinus Torvalds } 35221da177e4SLinus Torvalds ccw++; 35231da177e4SLinus Torvalds dst += blksize; 35241da177e4SLinus Torvalds recid++; 35251da177e4SLinus Torvalds } 35261da177e4SLinus Torvalds } 352713de227bSHolger Smolinski if (blk_noretry_request(req) || 352813de227bSHolger Smolinski block->base->features & DASD_FEATURE_FAILFAST) 35291c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 35308e09f215SStefan Weinhuber cqr->startdev = startdev; 35318e09f215SStefan Weinhuber cqr->memdev = startdev; 35328e09f215SStefan Weinhuber cqr->block = block; 35337c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 3534c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 35351f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 35361aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 35371da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 35385e2b17e7SJan Höppner 35395e2b17e7SJan Höppner /* Set flags to suppress output for expected errors */ 35405e2b17e7SJan Höppner if (dasd_eckd_is_ese(basedev)) { 35415e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); 35425e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); 35435e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 35445e2b17e7SJan Höppner } 35455e2b17e7SJan Höppner 35461da177e4SLinus Torvalds return cqr; 35471da177e4SLinus Torvalds } 35481da177e4SLinus Torvalds 3549f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track( 3550f3eb5384SStefan Weinhuber struct dasd_device *startdev, 3551f3eb5384SStefan Weinhuber struct dasd_block *block, 3552f3eb5384SStefan Weinhuber struct request *req, 3553f3eb5384SStefan Weinhuber sector_t first_rec, 3554f3eb5384SStefan Weinhuber sector_t last_rec, 3555f3eb5384SStefan Weinhuber sector_t first_trk, 3556f3eb5384SStefan Weinhuber sector_t last_trk, 3557f3eb5384SStefan Weinhuber unsigned int first_offs, 3558f3eb5384SStefan Weinhuber unsigned int last_offs, 3559f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 3560f3eb5384SStefan Weinhuber unsigned int blksize) 3561f3eb5384SStefan Weinhuber { 3562f3eb5384SStefan Weinhuber unsigned long *idaws; 3563f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 3564f3eb5384SStefan Weinhuber struct ccw1 *ccw; 3565f3eb5384SStefan Weinhuber struct req_iterator iter; 35667988613bSKent Overstreet struct bio_vec bv; 3567f3eb5384SStefan Weinhuber char *dst, *idaw_dst; 3568f3eb5384SStefan Weinhuber unsigned int cidaw, cplength, datasize; 3569f3eb5384SStefan Weinhuber unsigned int tlf; 3570f3eb5384SStefan Weinhuber sector_t recid; 3571f3eb5384SStefan Weinhuber unsigned char cmd; 3572f3eb5384SStefan Weinhuber struct dasd_device *basedev; 3573f3eb5384SStefan Weinhuber unsigned int trkcount, count, count_to_trk_end; 3574f3eb5384SStefan Weinhuber unsigned int idaw_len, seg_len, part_len, len_to_track_end; 3575f3eb5384SStefan Weinhuber unsigned char new_track, end_idaw; 3576f3eb5384SStefan Weinhuber sector_t trkid; 3577f3eb5384SStefan Weinhuber unsigned int recoffs; 3578f3eb5384SStefan Weinhuber 3579f3eb5384SStefan Weinhuber basedev = block->base; 3580f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) 3581f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 3582f3eb5384SStefan Weinhuber else if (rq_data_dir(req) == WRITE) 3583f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 3584f3eb5384SStefan Weinhuber else 3585f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 3586f3eb5384SStefan Weinhuber 3587f3eb5384SStefan Weinhuber /* Track based I/O needs IDAWs for each page, and not just for 3588f3eb5384SStefan Weinhuber * 64 bit addresses. We need additional idals for pages 3589f3eb5384SStefan Weinhuber * that get filled from two tracks, so we use the number 3590f3eb5384SStefan Weinhuber * of records as upper limit. 3591f3eb5384SStefan Weinhuber */ 3592f3eb5384SStefan Weinhuber cidaw = last_rec - first_rec + 1; 3593f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 3594f3eb5384SStefan Weinhuber 3595f3eb5384SStefan Weinhuber /* 1x prefix + one read/write ccw per track */ 3596f3eb5384SStefan Weinhuber cplength = 1 + trkcount; 3597f3eb5384SStefan Weinhuber 35987bf76f01SJan Höppner datasize = sizeof(struct PFX_eckd_data) + cidaw * sizeof(unsigned long); 3599f3eb5384SStefan Weinhuber 3600f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 360168b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, 3602c5205f2fSSebastian Ott startdev, blk_mq_rq_to_pdu(req)); 3603f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 3604f3eb5384SStefan Weinhuber return cqr; 3605f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 3606f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 3607f3eb5384SStefan Weinhuber if (first_trk == last_trk) 3608f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 3609f3eb5384SStefan Weinhuber else 3610f3eb5384SStefan Weinhuber tlf = last_offs + 1; 3611f3eb5384SStefan Weinhuber tlf *= blksize; 3612f3eb5384SStefan Weinhuber 3613f3eb5384SStefan Weinhuber if (prefix_LRE(ccw++, cqr->data, first_trk, 3614f3eb5384SStefan Weinhuber last_trk, cmd, basedev, startdev, 3615f3eb5384SStefan Weinhuber 1 /* format */, first_offs + 1, 3616f3eb5384SStefan Weinhuber trkcount, blksize, 3617f3eb5384SStefan Weinhuber tlf) == -EAGAIN) { 3618f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 3619f3eb5384SStefan Weinhuber * Try again later. 3620f3eb5384SStefan Weinhuber */ 3621f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 3622f3eb5384SStefan Weinhuber return ERR_PTR(-EAGAIN); 3623f3eb5384SStefan Weinhuber } 3624f3eb5384SStefan Weinhuber 3625f3eb5384SStefan Weinhuber /* 3626f3eb5384SStefan Weinhuber * The translation of request into ccw programs must meet the 3627f3eb5384SStefan Weinhuber * following conditions: 3628f3eb5384SStefan Weinhuber * - all idaws but the first and the last must address full pages 3629f3eb5384SStefan Weinhuber * (or 2K blocks on 31-bit) 3630f3eb5384SStefan Weinhuber * - the scope of a ccw and it's idal ends with the track boundaries 3631f3eb5384SStefan Weinhuber */ 3632f3eb5384SStefan Weinhuber idaws = (unsigned long *) (cqr->data + sizeof(struct PFX_eckd_data)); 3633f3eb5384SStefan Weinhuber recid = first_rec; 3634f3eb5384SStefan Weinhuber new_track = 1; 3635f3eb5384SStefan Weinhuber end_idaw = 0; 3636f3eb5384SStefan Weinhuber len_to_track_end = 0; 3637246ccea1SMartin Schwidefsky idaw_dst = NULL; 3638f3eb5384SStefan Weinhuber idaw_len = 0; 3639f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 36407988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 36417988613bSKent Overstreet seg_len = bv.bv_len; 3642f3eb5384SStefan Weinhuber while (seg_len) { 3643f3eb5384SStefan Weinhuber if (new_track) { 3644f3eb5384SStefan Weinhuber trkid = recid; 3645f3eb5384SStefan Weinhuber recoffs = sector_div(trkid, blk_per_trk); 3646f3eb5384SStefan Weinhuber count_to_trk_end = blk_per_trk - recoffs; 3647f3eb5384SStefan Weinhuber count = min((last_rec - recid + 1), 3648f3eb5384SStefan Weinhuber (sector_t)count_to_trk_end); 3649f3eb5384SStefan Weinhuber len_to_track_end = count * blksize; 3650f3eb5384SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 3651f3eb5384SStefan Weinhuber ccw->cmd_code = cmd; 3652f3eb5384SStefan Weinhuber ccw->count = len_to_track_end; 3653f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 3654f3eb5384SStefan Weinhuber ccw->flags = CCW_FLAG_IDA; 3655f3eb5384SStefan Weinhuber ccw++; 3656f3eb5384SStefan Weinhuber recid += count; 3657f3eb5384SStefan Weinhuber new_track = 0; 365852db45c3SStefan Weinhuber /* first idaw for a ccw may start anywhere */ 365952db45c3SStefan Weinhuber if (!idaw_dst) 366052db45c3SStefan Weinhuber idaw_dst = dst; 3661f3eb5384SStefan Weinhuber } 366252db45c3SStefan Weinhuber /* If we start a new idaw, we must make sure that it 366352db45c3SStefan Weinhuber * starts on an IDA_BLOCK_SIZE boundary. 3664f3eb5384SStefan Weinhuber * If we continue an idaw, we must make sure that the 3665f3eb5384SStefan Weinhuber * current segment begins where the so far accumulated 3666f3eb5384SStefan Weinhuber * idaw ends 3667f3eb5384SStefan Weinhuber */ 366852db45c3SStefan Weinhuber if (!idaw_dst) { 366952db45c3SStefan Weinhuber if (__pa(dst) & (IDA_BLOCK_SIZE-1)) { 367052db45c3SStefan Weinhuber dasd_sfree_request(cqr, startdev); 367152db45c3SStefan Weinhuber return ERR_PTR(-ERANGE); 367252db45c3SStefan Weinhuber } else 3673f3eb5384SStefan Weinhuber idaw_dst = dst; 367452db45c3SStefan Weinhuber } 3675f3eb5384SStefan Weinhuber if ((idaw_dst + idaw_len) != dst) { 3676f3eb5384SStefan Weinhuber dasd_sfree_request(cqr, startdev); 3677f3eb5384SStefan Weinhuber return ERR_PTR(-ERANGE); 3678f3eb5384SStefan Weinhuber } 3679f3eb5384SStefan Weinhuber part_len = min(seg_len, len_to_track_end); 3680f3eb5384SStefan Weinhuber seg_len -= part_len; 3681f3eb5384SStefan Weinhuber dst += part_len; 3682f3eb5384SStefan Weinhuber idaw_len += part_len; 3683f3eb5384SStefan Weinhuber len_to_track_end -= part_len; 3684f3eb5384SStefan Weinhuber /* collected memory area ends on an IDA_BLOCK border, 3685f3eb5384SStefan Weinhuber * -> create an idaw 3686f3eb5384SStefan Weinhuber * idal_create_words will handle cases where idaw_len 3687f3eb5384SStefan Weinhuber * is larger then IDA_BLOCK_SIZE 3688f3eb5384SStefan Weinhuber */ 3689f3eb5384SStefan Weinhuber if (!(__pa(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE-1))) 3690f3eb5384SStefan Weinhuber end_idaw = 1; 3691f3eb5384SStefan Weinhuber /* We also need to end the idaw at track end */ 3692f3eb5384SStefan Weinhuber if (!len_to_track_end) { 3693f3eb5384SStefan Weinhuber new_track = 1; 3694f3eb5384SStefan Weinhuber end_idaw = 1; 3695f3eb5384SStefan Weinhuber } 3696f3eb5384SStefan Weinhuber if (end_idaw) { 3697f3eb5384SStefan Weinhuber idaws = idal_create_words(idaws, idaw_dst, 3698f3eb5384SStefan Weinhuber idaw_len); 3699246ccea1SMartin Schwidefsky idaw_dst = NULL; 3700f3eb5384SStefan Weinhuber idaw_len = 0; 3701f3eb5384SStefan Weinhuber end_idaw = 0; 3702f3eb5384SStefan Weinhuber } 3703f3eb5384SStefan Weinhuber } 3704f3eb5384SStefan Weinhuber } 3705f3eb5384SStefan Weinhuber 3706f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 3707f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 3708f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 3709f3eb5384SStefan Weinhuber cqr->startdev = startdev; 3710f3eb5384SStefan Weinhuber cqr->memdev = startdev; 3711f3eb5384SStefan Weinhuber cqr->block = block; 37127c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 3713c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 37141f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 37151aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 3716f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 37175e2b17e7SJan Höppner 37185e2b17e7SJan Höppner /* Set flags to suppress output for expected errors */ 37195e2b17e7SJan Höppner if (dasd_eckd_is_ese(basedev)) 37205e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 37215e2b17e7SJan Höppner 3722f3eb5384SStefan Weinhuber return cqr; 3723f3eb5384SStefan Weinhuber } 3724f3eb5384SStefan Weinhuber 3725f3eb5384SStefan Weinhuber static int prepare_itcw(struct itcw *itcw, 3726f3eb5384SStefan Weinhuber unsigned int trk, unsigned int totrk, int cmd, 3727f3eb5384SStefan Weinhuber struct dasd_device *basedev, 3728f3eb5384SStefan Weinhuber struct dasd_device *startdev, 3729f3eb5384SStefan Weinhuber unsigned int rec_on_trk, int count, 3730f3eb5384SStefan Weinhuber unsigned int blksize, 3731f3eb5384SStefan Weinhuber unsigned int total_data_size, 3732f3eb5384SStefan Weinhuber unsigned int tlf, 3733f3eb5384SStefan Weinhuber unsigned int blk_per_trk) 3734f3eb5384SStefan Weinhuber { 3735f3eb5384SStefan Weinhuber struct PFX_eckd_data pfxdata; 3736f3eb5384SStefan Weinhuber struct dasd_eckd_private *basepriv, *startpriv; 3737f3eb5384SStefan Weinhuber struct DE_eckd_data *dedata; 3738f3eb5384SStefan Weinhuber struct LRE_eckd_data *lredata; 3739f3eb5384SStefan Weinhuber struct dcw *dcw; 3740f3eb5384SStefan Weinhuber 3741f3eb5384SStefan Weinhuber u32 begcyl, endcyl; 3742f3eb5384SStefan Weinhuber u16 heads, beghead, endhead; 3743f3eb5384SStefan Weinhuber u8 pfx_cmd; 3744f3eb5384SStefan Weinhuber 3745f3eb5384SStefan Weinhuber int rc = 0; 3746f3eb5384SStefan Weinhuber int sector = 0; 3747f3eb5384SStefan Weinhuber int dn, d; 3748f3eb5384SStefan Weinhuber 3749f3eb5384SStefan Weinhuber 3750f3eb5384SStefan Weinhuber /* setup prefix data */ 3751543691a4SSebastian Ott basepriv = basedev->private; 3752543691a4SSebastian Ott startpriv = startdev->private; 3753f3eb5384SStefan Weinhuber dedata = &pfxdata.define_extent; 3754f3eb5384SStefan Weinhuber lredata = &pfxdata.locate_record; 3755f3eb5384SStefan Weinhuber 3756f3eb5384SStefan Weinhuber memset(&pfxdata, 0, sizeof(pfxdata)); 3757f3eb5384SStefan Weinhuber pfxdata.format = 1; /* PFX with LRE */ 3758f3eb5384SStefan Weinhuber pfxdata.base_address = basepriv->ned->unit_addr; 3759f3eb5384SStefan Weinhuber pfxdata.base_lss = basepriv->ned->ID; 3760f3eb5384SStefan Weinhuber pfxdata.validity.define_extent = 1; 3761f3eb5384SStefan Weinhuber 3762f3eb5384SStefan Weinhuber /* private uid is kept up to date, conf_data may be outdated */ 3763da340f92SStefan Haberland if (startpriv->uid.type == UA_BASE_PAV_ALIAS) 3764f3eb5384SStefan Weinhuber pfxdata.validity.verify_base = 1; 3765da340f92SStefan Haberland 3766da340f92SStefan Haberland if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) { 3767da340f92SStefan Haberland pfxdata.validity.verify_base = 1; 3768f3eb5384SStefan Weinhuber pfxdata.validity.hyper_pav = 1; 3769f3eb5384SStefan Weinhuber } 3770f3eb5384SStefan Weinhuber 3771f3eb5384SStefan Weinhuber switch (cmd) { 3772f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_READ_TRACK_DATA: 3773f3eb5384SStefan Weinhuber dedata->mask.perm = 0x1; 3774f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 3775f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 3776f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 3777f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 3778f3eb5384SStefan Weinhuber lredata->operation.operation = 0x0C; 3779f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x01; 3780f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX_READ; 3781f3eb5384SStefan Weinhuber break; 3782f3eb5384SStefan Weinhuber case DASD_ECKD_CCW_WRITE_TRACK_DATA: 3783f3eb5384SStefan Weinhuber dedata->mask.perm = 0x02; 3784f3eb5384SStefan Weinhuber dedata->attributes.operation = basepriv->attrib.operation; 3785f3eb5384SStefan Weinhuber dedata->blk_size = blksize; 37865628683cSStefan Haberland rc = set_timestamp(NULL, dedata, basedev); 3787f3eb5384SStefan Weinhuber dedata->ga_extended |= 0x42; 3788f3eb5384SStefan Weinhuber lredata->operation.orientation = 0x0; 3789f3eb5384SStefan Weinhuber lredata->operation.operation = 0x3F; 3790f3eb5384SStefan Weinhuber lredata->extended_operation = 0x23; 3791f3eb5384SStefan Weinhuber lredata->auxiliary.check_bytes = 0x2; 379245f186beSJan Höppner /* 379345f186beSJan Höppner * If XRC is supported the System Time Stamp is set. The 379445f186beSJan Höppner * validity of the time stamp must be reflected in the prefix 379545f186beSJan Höppner * data as well. 379645f186beSJan Höppner */ 379745f186beSJan Höppner if (dedata->ga_extended & 0x08 && dedata->ga_extended & 0x02) 379845f186beSJan Höppner pfxdata.validity.time_stamp = 1; /* 'Time Stamp Valid' */ 3799f3eb5384SStefan Weinhuber pfx_cmd = DASD_ECKD_CCW_PFX; 3800f3eb5384SStefan Weinhuber break; 38018fd57520SJan Höppner case DASD_ECKD_CCW_READ_COUNT_MT: 38028fd57520SJan Höppner dedata->mask.perm = 0x1; 38038fd57520SJan Höppner dedata->attributes.operation = DASD_BYPASS_CACHE; 38048fd57520SJan Höppner dedata->ga_extended |= 0x42; 38058fd57520SJan Höppner dedata->blk_size = blksize; 38068fd57520SJan Höppner lredata->operation.orientation = 0x2; 38078fd57520SJan Höppner lredata->operation.operation = 0x16; 38088fd57520SJan Höppner lredata->auxiliary.check_bytes = 0x01; 38098fd57520SJan Höppner pfx_cmd = DASD_ECKD_CCW_PFX_READ; 38108fd57520SJan Höppner break; 3811f3eb5384SStefan Weinhuber default: 3812f3eb5384SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 3813f3eb5384SStefan Weinhuber "prepare itcw, unknown opcode 0x%x", cmd); 3814f3eb5384SStefan Weinhuber BUG(); 3815f3eb5384SStefan Weinhuber break; 3816f3eb5384SStefan Weinhuber } 3817f3eb5384SStefan Weinhuber if (rc) 3818f3eb5384SStefan Weinhuber return rc; 3819f3eb5384SStefan Weinhuber 3820f3eb5384SStefan Weinhuber dedata->attributes.mode = 0x3; /* ECKD */ 3821f3eb5384SStefan Weinhuber 3822f3eb5384SStefan Weinhuber heads = basepriv->rdc_data.trk_per_cyl; 3823f3eb5384SStefan Weinhuber begcyl = trk / heads; 3824f3eb5384SStefan Weinhuber beghead = trk % heads; 3825f3eb5384SStefan Weinhuber endcyl = totrk / heads; 3826f3eb5384SStefan Weinhuber endhead = totrk % heads; 3827f3eb5384SStefan Weinhuber 3828f3eb5384SStefan Weinhuber /* check for sequential prestage - enhance cylinder range */ 3829f3eb5384SStefan Weinhuber if (dedata->attributes.operation == DASD_SEQ_PRESTAGE || 3830f3eb5384SStefan Weinhuber dedata->attributes.operation == DASD_SEQ_ACCESS) { 3831f3eb5384SStefan Weinhuber 3832f3eb5384SStefan Weinhuber if (endcyl + basepriv->attrib.nr_cyl < basepriv->real_cyl) 3833f3eb5384SStefan Weinhuber endcyl += basepriv->attrib.nr_cyl; 3834f3eb5384SStefan Weinhuber else 3835f3eb5384SStefan Weinhuber endcyl = (basepriv->real_cyl - 1); 3836f3eb5384SStefan Weinhuber } 3837f3eb5384SStefan Weinhuber 3838f3eb5384SStefan Weinhuber set_ch_t(&dedata->beg_ext, begcyl, beghead); 3839f3eb5384SStefan Weinhuber set_ch_t(&dedata->end_ext, endcyl, endhead); 3840f3eb5384SStefan Weinhuber 3841f3eb5384SStefan Weinhuber dedata->ep_format = 0x20; /* records per track is valid */ 3842f3eb5384SStefan Weinhuber dedata->ep_rec_per_track = blk_per_trk; 3843f3eb5384SStefan Weinhuber 3844f3eb5384SStefan Weinhuber if (rec_on_trk) { 3845f3eb5384SStefan Weinhuber switch (basepriv->rdc_data.dev_type) { 3846f3eb5384SStefan Weinhuber case 0x3390: 3847f3eb5384SStefan Weinhuber dn = ceil_quot(blksize + 6, 232); 3848f3eb5384SStefan Weinhuber d = 9 + ceil_quot(blksize + 6 * (dn + 1), 34); 3849f3eb5384SStefan Weinhuber sector = (49 + (rec_on_trk - 1) * (10 + d)) / 8; 3850f3eb5384SStefan Weinhuber break; 3851f3eb5384SStefan Weinhuber case 0x3380: 3852f3eb5384SStefan Weinhuber d = 7 + ceil_quot(blksize + 12, 32); 3853f3eb5384SStefan Weinhuber sector = (39 + (rec_on_trk - 1) * (8 + d)) / 7; 3854f3eb5384SStefan Weinhuber break; 3855f3eb5384SStefan Weinhuber } 3856f3eb5384SStefan Weinhuber } 3857f3eb5384SStefan Weinhuber 38588fd57520SJan Höppner if (cmd == DASD_ECKD_CCW_READ_COUNT_MT) { 38598fd57520SJan Höppner lredata->auxiliary.length_valid = 0; 38608fd57520SJan Höppner lredata->auxiliary.length_scope = 0; 38618fd57520SJan Höppner lredata->sector = 0xff; 38628fd57520SJan Höppner } else { 3863f3eb5384SStefan Weinhuber lredata->auxiliary.length_valid = 1; 3864f3eb5384SStefan Weinhuber lredata->auxiliary.length_scope = 1; 38658fd57520SJan Höppner lredata->sector = sector; 38668fd57520SJan Höppner } 3867f3eb5384SStefan Weinhuber lredata->auxiliary.imbedded_ccw_valid = 1; 3868f3eb5384SStefan Weinhuber lredata->length = tlf; 3869f3eb5384SStefan Weinhuber lredata->imbedded_ccw = cmd; 3870f3eb5384SStefan Weinhuber lredata->count = count; 3871f3eb5384SStefan Weinhuber set_ch_t(&lredata->seek_addr, begcyl, beghead); 3872f3eb5384SStefan Weinhuber lredata->search_arg.cyl = lredata->seek_addr.cyl; 3873f3eb5384SStefan Weinhuber lredata->search_arg.head = lredata->seek_addr.head; 3874f3eb5384SStefan Weinhuber lredata->search_arg.record = rec_on_trk; 3875f3eb5384SStefan Weinhuber 3876f3eb5384SStefan Weinhuber dcw = itcw_add_dcw(itcw, pfx_cmd, 0, 3877f3eb5384SStefan Weinhuber &pfxdata, sizeof(pfxdata), total_data_size); 3878757853eaSGustavo A. R. Silva return PTR_ERR_OR_ZERO(dcw); 3879f3eb5384SStefan Weinhuber } 3880f3eb5384SStefan Weinhuber 3881f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track( 3882f3eb5384SStefan Weinhuber struct dasd_device *startdev, 3883f3eb5384SStefan Weinhuber struct dasd_block *block, 3884f3eb5384SStefan Weinhuber struct request *req, 3885f3eb5384SStefan Weinhuber sector_t first_rec, 3886f3eb5384SStefan Weinhuber sector_t last_rec, 3887f3eb5384SStefan Weinhuber sector_t first_trk, 3888f3eb5384SStefan Weinhuber sector_t last_trk, 3889f3eb5384SStefan Weinhuber unsigned int first_offs, 3890f3eb5384SStefan Weinhuber unsigned int last_offs, 3891f3eb5384SStefan Weinhuber unsigned int blk_per_trk, 3892f3eb5384SStefan Weinhuber unsigned int blksize) 3893f3eb5384SStefan Weinhuber { 3894f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 3895f3eb5384SStefan Weinhuber struct req_iterator iter; 38967988613bSKent Overstreet struct bio_vec bv; 3897f3eb5384SStefan Weinhuber char *dst; 3898f3eb5384SStefan Weinhuber unsigned int trkcount, ctidaw; 3899f3eb5384SStefan Weinhuber unsigned char cmd; 3900f3eb5384SStefan Weinhuber struct dasd_device *basedev; 3901f3eb5384SStefan Weinhuber unsigned int tlf; 3902f3eb5384SStefan Weinhuber struct itcw *itcw; 3903f3eb5384SStefan Weinhuber struct tidaw *last_tidaw = NULL; 3904f3eb5384SStefan Weinhuber int itcw_op; 3905f3eb5384SStefan Weinhuber size_t itcw_size; 3906ef19298bSStefan Weinhuber u8 tidaw_flags; 3907ef19298bSStefan Weinhuber unsigned int seg_len, part_len, len_to_track_end; 3908ef19298bSStefan Weinhuber unsigned char new_track; 3909ef19298bSStefan Weinhuber sector_t recid, trkid; 3910ef19298bSStefan Weinhuber unsigned int offs; 3911ef19298bSStefan Weinhuber unsigned int count, count_to_trk_end; 3912cd10502bSJulia Lawall int ret; 3913f3eb5384SStefan Weinhuber 3914f3eb5384SStefan Weinhuber basedev = block->base; 3915f3eb5384SStefan Weinhuber if (rq_data_dir(req) == READ) { 3916f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_READ_TRACK_DATA; 3917f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_READ; 3918f3eb5384SStefan Weinhuber } else if (rq_data_dir(req) == WRITE) { 3919f3eb5384SStefan Weinhuber cmd = DASD_ECKD_CCW_WRITE_TRACK_DATA; 3920f3eb5384SStefan Weinhuber itcw_op = ITCW_OP_WRITE; 3921f3eb5384SStefan Weinhuber } else 3922f3eb5384SStefan Weinhuber return ERR_PTR(-EINVAL); 3923f3eb5384SStefan Weinhuber 3924f3eb5384SStefan Weinhuber /* trackbased I/O needs address all memory via TIDAWs, 3925f3eb5384SStefan Weinhuber * not just for 64 bit addresses. This allows us to map 3926f3eb5384SStefan Weinhuber * each segment directly to one tidaw. 3927ef19298bSStefan Weinhuber * In the case of write requests, additional tidaws may 3928ef19298bSStefan Weinhuber * be needed when a segment crosses a track boundary. 3929f3eb5384SStefan Weinhuber */ 3930f3eb5384SStefan Weinhuber trkcount = last_trk - first_trk + 1; 3931f3eb5384SStefan Weinhuber ctidaw = 0; 3932f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 3933f3eb5384SStefan Weinhuber ++ctidaw; 3934f3eb5384SStefan Weinhuber } 3935ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 3936ef19298bSStefan Weinhuber ctidaw += (last_trk - first_trk); 3937f3eb5384SStefan Weinhuber 3938f3eb5384SStefan Weinhuber /* Allocate the ccw request. */ 3939f3eb5384SStefan Weinhuber itcw_size = itcw_calc_size(0, ctidaw, 0); 3940c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 0, itcw_size, startdev, 3941c5205f2fSSebastian Ott blk_mq_rq_to_pdu(req)); 3942f3eb5384SStefan Weinhuber if (IS_ERR(cqr)) 3943f3eb5384SStefan Weinhuber return cqr; 3944f3eb5384SStefan Weinhuber 3945f3eb5384SStefan Weinhuber /* transfer length factor: how many bytes to read from the last track */ 3946f3eb5384SStefan Weinhuber if (first_trk == last_trk) 3947f3eb5384SStefan Weinhuber tlf = last_offs - first_offs + 1; 3948f3eb5384SStefan Weinhuber else 3949f3eb5384SStefan Weinhuber tlf = last_offs + 1; 3950f3eb5384SStefan Weinhuber tlf *= blksize; 3951f3eb5384SStefan Weinhuber 3952f3eb5384SStefan Weinhuber itcw = itcw_init(cqr->data, itcw_size, itcw_op, 0, ctidaw, 0); 3953ef19298bSStefan Weinhuber if (IS_ERR(itcw)) { 3954cd10502bSJulia Lawall ret = -EINVAL; 3955cd10502bSJulia Lawall goto out_error; 3956ef19298bSStefan Weinhuber } 3957f3eb5384SStefan Weinhuber cqr->cpaddr = itcw_get_tcw(itcw); 3958f3eb5384SStefan Weinhuber if (prepare_itcw(itcw, first_trk, last_trk, 3959f3eb5384SStefan Weinhuber cmd, basedev, startdev, 3960f3eb5384SStefan Weinhuber first_offs + 1, 3961f3eb5384SStefan Weinhuber trkcount, blksize, 3962f3eb5384SStefan Weinhuber (last_rec - first_rec + 1) * blksize, 3963f3eb5384SStefan Weinhuber tlf, blk_per_trk) == -EAGAIN) { 3964f3eb5384SStefan Weinhuber /* Clock not in sync and XRC is enabled. 3965f3eb5384SStefan Weinhuber * Try again later. 3966f3eb5384SStefan Weinhuber */ 3967cd10502bSJulia Lawall ret = -EAGAIN; 3968cd10502bSJulia Lawall goto out_error; 3969f3eb5384SStefan Weinhuber } 3970d54cddb6SHeiko Carstens len_to_track_end = 0; 3971f3eb5384SStefan Weinhuber /* 3972f3eb5384SStefan Weinhuber * A tidaw can address 4k of memory, but must not cross page boundaries 3973f3eb5384SStefan Weinhuber * We can let the block layer handle this by setting 3974f3eb5384SStefan Weinhuber * blk_queue_segment_boundary to page boundaries and 3975f3eb5384SStefan Weinhuber * blk_max_segment_size to page size when setting up the request queue. 3976ef19298bSStefan Weinhuber * For write requests, a TIDAW must not cross track boundaries, because 3977ef19298bSStefan Weinhuber * we have to set the CBC flag on the last tidaw for each track. 3978f3eb5384SStefan Weinhuber */ 3979ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) { 3980ef19298bSStefan Weinhuber new_track = 1; 3981ef19298bSStefan Weinhuber recid = first_rec; 3982f3eb5384SStefan Weinhuber rq_for_each_segment(bv, req, iter) { 39837988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 39847988613bSKent Overstreet seg_len = bv.bv_len; 3985ef19298bSStefan Weinhuber while (seg_len) { 3986ef19298bSStefan Weinhuber if (new_track) { 3987ef19298bSStefan Weinhuber trkid = recid; 3988ef19298bSStefan Weinhuber offs = sector_div(trkid, blk_per_trk); 3989ef19298bSStefan Weinhuber count_to_trk_end = blk_per_trk - offs; 3990ef19298bSStefan Weinhuber count = min((last_rec - recid + 1), 3991ef19298bSStefan Weinhuber (sector_t)count_to_trk_end); 3992ef19298bSStefan Weinhuber len_to_track_end = count * blksize; 3993ef19298bSStefan Weinhuber recid += count; 3994ef19298bSStefan Weinhuber new_track = 0; 3995f3eb5384SStefan Weinhuber } 3996ef19298bSStefan Weinhuber part_len = min(seg_len, len_to_track_end); 3997ef19298bSStefan Weinhuber seg_len -= part_len; 3998ef19298bSStefan Weinhuber len_to_track_end -= part_len; 3999ef19298bSStefan Weinhuber /* We need to end the tidaw at track end */ 4000ef19298bSStefan Weinhuber if (!len_to_track_end) { 4001ef19298bSStefan Weinhuber new_track = 1; 4002ef19298bSStefan Weinhuber tidaw_flags = TIDAW_FLAGS_INSERT_CBC; 4003ef19298bSStefan Weinhuber } else 4004ef19298bSStefan Weinhuber tidaw_flags = 0; 4005ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, tidaw_flags, 4006ef19298bSStefan Weinhuber dst, part_len); 4007cd10502bSJulia Lawall if (IS_ERR(last_tidaw)) { 4008cd10502bSJulia Lawall ret = -EINVAL; 4009cd10502bSJulia Lawall goto out_error; 4010cd10502bSJulia Lawall } 4011ef19298bSStefan Weinhuber dst += part_len; 4012ef19298bSStefan Weinhuber } 4013ef19298bSStefan Weinhuber } 4014ef19298bSStefan Weinhuber } else { 4015ef19298bSStefan Weinhuber rq_for_each_segment(bv, req, iter) { 40167988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 4017ef19298bSStefan Weinhuber last_tidaw = itcw_add_tidaw(itcw, 0x00, 40187988613bSKent Overstreet dst, bv.bv_len); 4019cd10502bSJulia Lawall if (IS_ERR(last_tidaw)) { 4020cd10502bSJulia Lawall ret = -EINVAL; 4021cd10502bSJulia Lawall goto out_error; 4022cd10502bSJulia Lawall } 4023ef19298bSStefan Weinhuber } 4024ef19298bSStefan Weinhuber } 4025ef19298bSStefan Weinhuber last_tidaw->flags |= TIDAW_FLAGS_LAST; 4026ef19298bSStefan Weinhuber last_tidaw->flags &= ~TIDAW_FLAGS_INSERT_CBC; 4027f3eb5384SStefan Weinhuber itcw_finalize(itcw); 4028f3eb5384SStefan Weinhuber 4029f3eb5384SStefan Weinhuber if (blk_noretry_request(req) || 4030f3eb5384SStefan Weinhuber block->base->features & DASD_FEATURE_FAILFAST) 4031f3eb5384SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4032ef19298bSStefan Weinhuber cqr->cpmode = 1; 4033f3eb5384SStefan Weinhuber cqr->startdev = startdev; 4034f3eb5384SStefan Weinhuber cqr->memdev = startdev; 4035f3eb5384SStefan Weinhuber cqr->block = block; 40367c8faa86SStefan Haberland cqr->expires = startdev->default_expires * HZ; /* default 5 minutes */ 4037c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 40381f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 40391aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 4040f3eb5384SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 40415e2b17e7SJan Höppner 40425e2b17e7SJan Höppner /* Set flags to suppress output for expected errors */ 40435e2b17e7SJan Höppner if (dasd_eckd_is_ese(basedev)) { 40445e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_FP, &cqr->flags); 40455e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_IL, &cqr->flags); 40465e2b17e7SJan Höppner set_bit(DASD_CQR_SUPPRESS_NRF, &cqr->flags); 40475e2b17e7SJan Höppner } 40485e2b17e7SJan Höppner 4049f3eb5384SStefan Weinhuber return cqr; 4050cd10502bSJulia Lawall out_error: 4051cd10502bSJulia Lawall dasd_sfree_request(cqr, startdev); 4052cd10502bSJulia Lawall return ERR_PTR(ret); 4053f3eb5384SStefan Weinhuber } 4054f3eb5384SStefan Weinhuber 4055f3eb5384SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev, 4056f3eb5384SStefan Weinhuber struct dasd_block *block, 4057f3eb5384SStefan Weinhuber struct request *req) 4058f3eb5384SStefan Weinhuber { 4059ef19298bSStefan Weinhuber int cmdrtd, cmdwtd; 4060f3eb5384SStefan Weinhuber int use_prefix; 4061ef19298bSStefan Weinhuber int fcx_multitrack; 406245b44d76SStefan Weinhuber struct dasd_eckd_private *private; 4063f3eb5384SStefan Weinhuber struct dasd_device *basedev; 4064f3eb5384SStefan Weinhuber sector_t first_rec, last_rec; 4065f3eb5384SStefan Weinhuber sector_t first_trk, last_trk; 4066f3eb5384SStefan Weinhuber unsigned int first_offs, last_offs; 4067f3eb5384SStefan Weinhuber unsigned int blk_per_trk, blksize; 4068f3eb5384SStefan Weinhuber int cdlspecial; 4069ef19298bSStefan Weinhuber unsigned int data_size; 4070f3eb5384SStefan Weinhuber struct dasd_ccw_req *cqr; 4071f3eb5384SStefan Weinhuber 4072f3eb5384SStefan Weinhuber basedev = block->base; 4073543691a4SSebastian Ott private = basedev->private; 4074f3eb5384SStefan Weinhuber 4075f3eb5384SStefan Weinhuber /* Calculate number of blocks/records per track. */ 4076f3eb5384SStefan Weinhuber blksize = block->bp_block; 4077f3eb5384SStefan Weinhuber blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 40786fca97a9SStefan Haberland if (blk_per_trk == 0) 40796fca97a9SStefan Haberland return ERR_PTR(-EINVAL); 4080f3eb5384SStefan Weinhuber /* Calculate record id of first and last block. */ 408183096ebfSTejun Heo first_rec = first_trk = blk_rq_pos(req) >> block->s2b_shift; 4082f3eb5384SStefan Weinhuber first_offs = sector_div(first_trk, blk_per_trk); 4083f3eb5384SStefan Weinhuber last_rec = last_trk = 408483096ebfSTejun Heo (blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift; 4085f3eb5384SStefan Weinhuber last_offs = sector_div(last_trk, blk_per_trk); 4086f3eb5384SStefan Weinhuber cdlspecial = (private->uses_cdl && first_rec < 2*blk_per_trk); 4087f3eb5384SStefan Weinhuber 4088ef19298bSStefan Weinhuber fcx_multitrack = private->features.feature[40] & 0x20; 4089ef19298bSStefan Weinhuber data_size = blk_rq_bytes(req); 409026a35f37SStefan Weinhuber if (data_size % blksize) 409126a35f37SStefan Weinhuber return ERR_PTR(-EINVAL); 4092ef19298bSStefan Weinhuber /* tpm write request add CBC data on each track boundary */ 4093ef19298bSStefan Weinhuber if (rq_data_dir(req) == WRITE) 4094ef19298bSStefan Weinhuber data_size += (last_trk - first_trk) * 4; 4095f3eb5384SStefan Weinhuber 4096f3eb5384SStefan Weinhuber /* is read track data and write track data in command mode supported? */ 4097f3eb5384SStefan Weinhuber cmdrtd = private->features.feature[9] & 0x20; 4098f3eb5384SStefan Weinhuber cmdwtd = private->features.feature[12] & 0x40; 4099f3eb5384SStefan Weinhuber use_prefix = private->features.feature[8] & 0x01; 4100f3eb5384SStefan Weinhuber 4101f3eb5384SStefan Weinhuber cqr = NULL; 4102f3eb5384SStefan Weinhuber if (cdlspecial || dasd_page_cache) { 4103f3eb5384SStefan Weinhuber /* do nothing, just fall through to the cmd mode single case */ 4104ef19298bSStefan Weinhuber } else if ((data_size <= private->fcx_max_data) 4105ef19298bSStefan Weinhuber && (fcx_multitrack || (first_trk == last_trk))) { 4106f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_tpm_track(startdev, block, req, 4107f3eb5384SStefan Weinhuber first_rec, last_rec, 4108f3eb5384SStefan Weinhuber first_trk, last_trk, 4109f3eb5384SStefan Weinhuber first_offs, last_offs, 4110f3eb5384SStefan Weinhuber blk_per_trk, blksize); 4111ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 4112ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 4113f3eb5384SStefan Weinhuber cqr = NULL; 4114f3eb5384SStefan Weinhuber } else if (use_prefix && 4115f3eb5384SStefan Weinhuber (((rq_data_dir(req) == READ) && cmdrtd) || 4116f3eb5384SStefan Weinhuber ((rq_data_dir(req) == WRITE) && cmdwtd))) { 4117f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_track(startdev, block, req, 4118f3eb5384SStefan Weinhuber first_rec, last_rec, 4119f3eb5384SStefan Weinhuber first_trk, last_trk, 4120f3eb5384SStefan Weinhuber first_offs, last_offs, 4121f3eb5384SStefan Weinhuber blk_per_trk, blksize); 4122ef19298bSStefan Weinhuber if (IS_ERR(cqr) && (PTR_ERR(cqr) != -EAGAIN) && 4123ef19298bSStefan Weinhuber (PTR_ERR(cqr) != -ENOMEM)) 4124f3eb5384SStefan Weinhuber cqr = NULL; 4125f3eb5384SStefan Weinhuber } 4126f3eb5384SStefan Weinhuber if (!cqr) 4127f3eb5384SStefan Weinhuber cqr = dasd_eckd_build_cp_cmd_single(startdev, block, req, 4128f3eb5384SStefan Weinhuber first_rec, last_rec, 4129f3eb5384SStefan Weinhuber first_trk, last_trk, 4130f3eb5384SStefan Weinhuber first_offs, last_offs, 4131f3eb5384SStefan Weinhuber blk_per_trk, blksize); 4132f3eb5384SStefan Weinhuber return cqr; 4133f3eb5384SStefan Weinhuber } 4134f3eb5384SStefan Weinhuber 4135bbc7f7eaSJan Höppner static struct dasd_ccw_req *dasd_eckd_build_cp_raw(struct dasd_device *startdev, 4136e4dbb0f2SStefan Haberland struct dasd_block *block, 4137e4dbb0f2SStefan Haberland struct request *req) 4138e4dbb0f2SStefan Haberland { 41399d2be0c1SJan Höppner sector_t start_padding_sectors, end_sector_offset, end_padding_sectors; 4140e4dbb0f2SStefan Haberland unsigned int seg_len, len_to_track_end; 4141e4dbb0f2SStefan Haberland unsigned int cidaw, cplength, datasize; 4142558b9ef0SStefan Weinhuber sector_t first_trk, last_trk, sectors; 41439d2be0c1SJan Höppner struct dasd_eckd_private *base_priv; 41449d2be0c1SJan Höppner struct dasd_device *basedev; 41459d2be0c1SJan Höppner struct req_iterator iter; 41469d2be0c1SJan Höppner struct dasd_ccw_req *cqr; 41479d2be0c1SJan Höppner unsigned int first_offs; 41489d2be0c1SJan Höppner unsigned int trkcount; 41499d2be0c1SJan Höppner unsigned long *idaws; 41509d2be0c1SJan Höppner unsigned int size; 41519d2be0c1SJan Höppner unsigned char cmd; 41529d2be0c1SJan Höppner struct bio_vec bv; 41539d2be0c1SJan Höppner struct ccw1 *ccw; 41549d2be0c1SJan Höppner int use_prefix; 41559d2be0c1SJan Höppner void *data; 41569d2be0c1SJan Höppner char *dst; 4157e4dbb0f2SStefan Haberland 4158e4dbb0f2SStefan Haberland /* 4159e4dbb0f2SStefan Haberland * raw track access needs to be mutiple of 64k and on 64k boundary 4160558b9ef0SStefan Weinhuber * For read requests we can fix an incorrect alignment by padding 4161558b9ef0SStefan Weinhuber * the request with dummy pages. 4162e4dbb0f2SStefan Haberland */ 4163558b9ef0SStefan Weinhuber start_padding_sectors = blk_rq_pos(req) % DASD_RAW_SECTORS_PER_TRACK; 4164558b9ef0SStefan Weinhuber end_sector_offset = (blk_rq_pos(req) + blk_rq_sectors(req)) % 4165558b9ef0SStefan Weinhuber DASD_RAW_SECTORS_PER_TRACK; 4166558b9ef0SStefan Weinhuber end_padding_sectors = (DASD_RAW_SECTORS_PER_TRACK - end_sector_offset) % 4167558b9ef0SStefan Weinhuber DASD_RAW_SECTORS_PER_TRACK; 4168558b9ef0SStefan Weinhuber basedev = block->base; 4169558b9ef0SStefan Weinhuber if ((start_padding_sectors || end_padding_sectors) && 4170558b9ef0SStefan Weinhuber (rq_data_dir(req) == WRITE)) { 4171558b9ef0SStefan Weinhuber DBF_DEV_EVENT(DBF_ERR, basedev, 4172e78c21d1SMing Lei "raw write not track aligned (%llu,%llu) req %p", 4173558b9ef0SStefan Weinhuber start_padding_sectors, end_padding_sectors, req); 41749d2be0c1SJan Höppner return ERR_PTR(-EINVAL); 4175e4dbb0f2SStefan Haberland } 4176e4dbb0f2SStefan Haberland 4177e4dbb0f2SStefan Haberland first_trk = blk_rq_pos(req) / DASD_RAW_SECTORS_PER_TRACK; 4178e4dbb0f2SStefan Haberland last_trk = (blk_rq_pos(req) + blk_rq_sectors(req) - 1) / 4179e4dbb0f2SStefan Haberland DASD_RAW_SECTORS_PER_TRACK; 4180e4dbb0f2SStefan Haberland trkcount = last_trk - first_trk + 1; 4181e4dbb0f2SStefan Haberland first_offs = 0; 4182e4dbb0f2SStefan Haberland 4183e4dbb0f2SStefan Haberland if (rq_data_dir(req) == READ) 4184e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_READ_TRACK; 4185e4dbb0f2SStefan Haberland else if (rq_data_dir(req) == WRITE) 4186e4dbb0f2SStefan Haberland cmd = DASD_ECKD_CCW_WRITE_FULL_TRACK; 41879d2be0c1SJan Höppner else 41889d2be0c1SJan Höppner return ERR_PTR(-EINVAL); 4189e4dbb0f2SStefan Haberland 4190e4dbb0f2SStefan Haberland /* 4191e4dbb0f2SStefan Haberland * Raw track based I/O needs IDAWs for each page, 4192e4dbb0f2SStefan Haberland * and not just for 64 bit addresses. 4193e4dbb0f2SStefan Haberland */ 4194e4dbb0f2SStefan Haberland cidaw = trkcount * DASD_RAW_BLOCK_PER_TRACK; 4195e4dbb0f2SStefan Haberland 4196e4dbb0f2SStefan Haberland /* 41979d2be0c1SJan Höppner * struct PFX_eckd_data and struct LRE_eckd_data can have up to 2 bytes 41989d2be0c1SJan Höppner * of extended parameter. This is needed for write full track. 4199e4dbb0f2SStefan Haberland */ 42009d2be0c1SJan Höppner base_priv = basedev->private; 42019d2be0c1SJan Höppner use_prefix = base_priv->features.feature[8] & 0x01; 42029d2be0c1SJan Höppner if (use_prefix) { 42039d2be0c1SJan Höppner cplength = 1 + trkcount; 42049d2be0c1SJan Höppner size = sizeof(struct PFX_eckd_data) + 2; 42059d2be0c1SJan Höppner } else { 42069d2be0c1SJan Höppner cplength = 2 + trkcount; 42079d2be0c1SJan Höppner size = sizeof(struct DE_eckd_data) + 42089d2be0c1SJan Höppner sizeof(struct LRE_eckd_data) + 2; 42099d2be0c1SJan Höppner } 42109d2be0c1SJan Höppner size = ALIGN(size, 8); 4211e4dbb0f2SStefan Haberland 42127bf76f01SJan Höppner datasize = size + cidaw * sizeof(unsigned long); 4213e4dbb0f2SStefan Haberland 4214e4dbb0f2SStefan Haberland /* Allocate the ccw request. */ 4215e4dbb0f2SStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, 4216c5205f2fSSebastian Ott datasize, startdev, blk_mq_rq_to_pdu(req)); 4217e4dbb0f2SStefan Haberland if (IS_ERR(cqr)) 42189d2be0c1SJan Höppner return cqr; 4219e4dbb0f2SStefan Haberland 42209d2be0c1SJan Höppner ccw = cqr->cpaddr; 42219d2be0c1SJan Höppner data = cqr->data; 42229d2be0c1SJan Höppner 42239d2be0c1SJan Höppner if (use_prefix) { 42249d2be0c1SJan Höppner prefix_LRE(ccw++, data, first_trk, last_trk, cmd, basedev, 42259d2be0c1SJan Höppner startdev, 1, first_offs + 1, trkcount, 0, 0); 42269d2be0c1SJan Höppner } else { 42279d2be0c1SJan Höppner define_extent(ccw++, data, first_trk, last_trk, cmd, basedev, 0); 42289d2be0c1SJan Höppner ccw[-1].flags |= CCW_FLAG_CC; 42299d2be0c1SJan Höppner 42309d2be0c1SJan Höppner data += sizeof(struct DE_eckd_data); 42319d2be0c1SJan Höppner locate_record_ext(ccw++, data, first_trk, first_offs + 1, 42329d2be0c1SJan Höppner trkcount, cmd, basedev, 0, 0); 4233e4dbb0f2SStefan Haberland } 4234e4dbb0f2SStefan Haberland 42359d2be0c1SJan Höppner idaws = (unsigned long *)(cqr->data + size); 4236e4dbb0f2SStefan Haberland len_to_track_end = 0; 4237558b9ef0SStefan Weinhuber if (start_padding_sectors) { 4238558b9ef0SStefan Weinhuber ccw[-1].flags |= CCW_FLAG_CC; 4239558b9ef0SStefan Weinhuber ccw->cmd_code = cmd; 4240558b9ef0SStefan Weinhuber /* maximum 3390 track size */ 4241558b9ef0SStefan Weinhuber ccw->count = 57326; 4242558b9ef0SStefan Weinhuber /* 64k map to one track */ 4243558b9ef0SStefan Weinhuber len_to_track_end = 65536 - start_padding_sectors * 512; 4244558b9ef0SStefan Weinhuber ccw->cda = (__u32)(addr_t)idaws; 4245558b9ef0SStefan Weinhuber ccw->flags |= CCW_FLAG_IDA; 4246558b9ef0SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4247558b9ef0SStefan Weinhuber ccw++; 4248558b9ef0SStefan Weinhuber for (sectors = 0; sectors < start_padding_sectors; sectors += 8) 4249558b9ef0SStefan Weinhuber idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 4250558b9ef0SStefan Weinhuber } 4251e4dbb0f2SStefan Haberland rq_for_each_segment(bv, req, iter) { 42527988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 42537988613bSKent Overstreet seg_len = bv.bv_len; 4254558b9ef0SStefan Weinhuber if (cmd == DASD_ECKD_CCW_READ_TRACK) 4255558b9ef0SStefan Weinhuber memset(dst, 0, seg_len); 4256e4dbb0f2SStefan Haberland if (!len_to_track_end) { 4257e4dbb0f2SStefan Haberland ccw[-1].flags |= CCW_FLAG_CC; 4258e4dbb0f2SStefan Haberland ccw->cmd_code = cmd; 4259e4dbb0f2SStefan Haberland /* maximum 3390 track size */ 4260e4dbb0f2SStefan Haberland ccw->count = 57326; 4261e4dbb0f2SStefan Haberland /* 64k map to one track */ 4262e4dbb0f2SStefan Haberland len_to_track_end = 65536; 4263e4dbb0f2SStefan Haberland ccw->cda = (__u32)(addr_t)idaws; 4264e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_IDA; 4265e4dbb0f2SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 4266e4dbb0f2SStefan Haberland ccw++; 4267e4dbb0f2SStefan Haberland } 4268e4dbb0f2SStefan Haberland len_to_track_end -= seg_len; 4269e4dbb0f2SStefan Haberland idaws = idal_create_words(idaws, dst, seg_len); 4270e4dbb0f2SStefan Haberland } 4271558b9ef0SStefan Weinhuber for (sectors = 0; sectors < end_padding_sectors; sectors += 8) 4272558b9ef0SStefan Weinhuber idaws = idal_create_words(idaws, rawpadpage, PAGE_SIZE); 4273e4dbb0f2SStefan Haberland if (blk_noretry_request(req) || 4274e4dbb0f2SStefan Haberland block->base->features & DASD_FEATURE_FAILFAST) 4275e4dbb0f2SStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4276e4dbb0f2SStefan Haberland cqr->startdev = startdev; 4277e4dbb0f2SStefan Haberland cqr->memdev = startdev; 4278e4dbb0f2SStefan Haberland cqr->block = block; 4279e4dbb0f2SStefan Haberland cqr->expires = startdev->default_expires * HZ; 4280c9346151SStefan Haberland cqr->lpm = dasd_path_get_ppm(startdev); 42811f1ee9adSHannes Reinecke cqr->retries = startdev->default_retries; 42821aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 4283e4dbb0f2SStefan Haberland cqr->status = DASD_CQR_FILLED; 4284e4dbb0f2SStefan Haberland 4285e4dbb0f2SStefan Haberland return cqr; 4286e4dbb0f2SStefan Haberland } 4287e4dbb0f2SStefan Haberland 4288e4dbb0f2SStefan Haberland 42891da177e4SLinus Torvalds static int 42901da177e4SLinus Torvalds dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req) 42911da177e4SLinus Torvalds { 42921da177e4SLinus Torvalds struct dasd_eckd_private *private; 42931da177e4SLinus Torvalds struct ccw1 *ccw; 42945705f702SNeilBrown struct req_iterator iter; 42957988613bSKent Overstreet struct bio_vec bv; 42961da177e4SLinus Torvalds char *dst, *cda; 42971da177e4SLinus Torvalds unsigned int blksize, blk_per_trk, off; 42981da177e4SLinus Torvalds sector_t recid; 42995705f702SNeilBrown int status; 43001da177e4SLinus Torvalds 43011da177e4SLinus Torvalds if (!dasd_page_cache) 43021da177e4SLinus Torvalds goto out; 4303543691a4SSebastian Ott private = cqr->block->base->private; 43048e09f215SStefan Weinhuber blksize = cqr->block->bp_block; 43051da177e4SLinus Torvalds blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize); 430683096ebfSTejun Heo recid = blk_rq_pos(req) >> cqr->block->s2b_shift; 43071da177e4SLinus Torvalds ccw = cqr->cpaddr; 43081da177e4SLinus Torvalds /* Skip over define extent & locate record. */ 43091da177e4SLinus Torvalds ccw++; 43101da177e4SLinus Torvalds if (private->uses_cdl == 0 || recid > 2*blk_per_trk) 43111da177e4SLinus Torvalds ccw++; 43125705f702SNeilBrown rq_for_each_segment(bv, req, iter) { 43137988613bSKent Overstreet dst = page_address(bv.bv_page) + bv.bv_offset; 43147988613bSKent Overstreet for (off = 0; off < bv.bv_len; off += blksize) { 43151da177e4SLinus Torvalds /* Skip locate record. */ 43161da177e4SLinus Torvalds if (private->uses_cdl && recid <= 2*blk_per_trk) 43171da177e4SLinus Torvalds ccw++; 43181da177e4SLinus Torvalds if (dst) { 43191da177e4SLinus Torvalds if (ccw->flags & CCW_FLAG_IDA) 43201da177e4SLinus Torvalds cda = *((char **)((addr_t) ccw->cda)); 43211da177e4SLinus Torvalds else 43221da177e4SLinus Torvalds cda = (char *)((addr_t) ccw->cda); 43231da177e4SLinus Torvalds if (dst != cda) { 43241da177e4SLinus Torvalds if (rq_data_dir(req) == READ) 43257988613bSKent Overstreet memcpy(dst, cda, bv.bv_len); 43261da177e4SLinus Torvalds kmem_cache_free(dasd_page_cache, 43271da177e4SLinus Torvalds (void *)((addr_t)cda & PAGE_MASK)); 43281da177e4SLinus Torvalds } 43291da177e4SLinus Torvalds dst = NULL; 43301da177e4SLinus Torvalds } 43311da177e4SLinus Torvalds ccw++; 43321da177e4SLinus Torvalds recid++; 43331da177e4SLinus Torvalds } 43341da177e4SLinus Torvalds } 43351da177e4SLinus Torvalds out: 43361da177e4SLinus Torvalds status = cqr->status == DASD_CQR_DONE; 43378e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 43381da177e4SLinus Torvalds return status; 43391da177e4SLinus Torvalds } 43401da177e4SLinus Torvalds 43418e09f215SStefan Weinhuber /* 4342f3eb5384SStefan Weinhuber * Modify ccw/tcw in cqr so it can be started on a base device. 43438e09f215SStefan Weinhuber * 43448e09f215SStefan Weinhuber * Note that this is not enough to restart the cqr! 43458e09f215SStefan Weinhuber * Either reset cqr->startdev as well (summary unit check handling) 43468e09f215SStefan Weinhuber * or restart via separate cqr (as in ERP handling). 43478e09f215SStefan Weinhuber */ 43488e09f215SStefan Weinhuber void dasd_eckd_reset_ccw_to_base_io(struct dasd_ccw_req *cqr) 43498e09f215SStefan Weinhuber { 43508e09f215SStefan Weinhuber struct ccw1 *ccw; 43518e09f215SStefan Weinhuber struct PFX_eckd_data *pfxdata; 4352f3eb5384SStefan Weinhuber struct tcw *tcw; 4353f3eb5384SStefan Weinhuber struct tccb *tccb; 4354f3eb5384SStefan Weinhuber struct dcw *dcw; 43558e09f215SStefan Weinhuber 4356f3eb5384SStefan Weinhuber if (cqr->cpmode == 1) { 4357f3eb5384SStefan Weinhuber tcw = cqr->cpaddr; 4358f3eb5384SStefan Weinhuber tccb = tcw_get_tccb(tcw); 4359f3eb5384SStefan Weinhuber dcw = (struct dcw *)&tccb->tca[0]; 4360f3eb5384SStefan Weinhuber pfxdata = (struct PFX_eckd_data *)&dcw->cd[0]; 4361f3eb5384SStefan Weinhuber pfxdata->validity.verify_base = 0; 4362f3eb5384SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 4363f3eb5384SStefan Weinhuber } else { 43648e09f215SStefan Weinhuber ccw = cqr->cpaddr; 43658e09f215SStefan Weinhuber pfxdata = cqr->data; 43668e09f215SStefan Weinhuber if (ccw->cmd_code == DASD_ECKD_CCW_PFX) { 43678e09f215SStefan Weinhuber pfxdata->validity.verify_base = 0; 43688e09f215SStefan Weinhuber pfxdata->validity.hyper_pav = 0; 43698e09f215SStefan Weinhuber } 43708e09f215SStefan Weinhuber } 4371f3eb5384SStefan Weinhuber } 43728e09f215SStefan Weinhuber 43738e09f215SStefan Weinhuber #define DASD_ECKD_CHANQ_MAX_SIZE 4 43748e09f215SStefan Weinhuber 43758e09f215SStefan Weinhuber static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base, 43768e09f215SStefan Weinhuber struct dasd_block *block, 43778e09f215SStefan Weinhuber struct request *req) 43788e09f215SStefan Weinhuber { 43798e09f215SStefan Weinhuber struct dasd_eckd_private *private; 43808e09f215SStefan Weinhuber struct dasd_device *startdev; 43818e09f215SStefan Weinhuber unsigned long flags; 43828e09f215SStefan Weinhuber struct dasd_ccw_req *cqr; 43838e09f215SStefan Weinhuber 43848e09f215SStefan Weinhuber startdev = dasd_alias_get_start_dev(base); 43858e09f215SStefan Weinhuber if (!startdev) 43868e09f215SStefan Weinhuber startdev = base; 4387543691a4SSebastian Ott private = startdev->private; 43888e09f215SStefan Weinhuber if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE) 43898e09f215SStefan Weinhuber return ERR_PTR(-EBUSY); 43908e09f215SStefan Weinhuber 43918e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(startdev->cdev), flags); 43928e09f215SStefan Weinhuber private->count++; 4393e4dbb0f2SStefan Haberland if ((base->features & DASD_FEATURE_USERAW)) 4394bbc7f7eaSJan Höppner cqr = dasd_eckd_build_cp_raw(startdev, block, req); 4395e4dbb0f2SStefan Haberland else 43968e09f215SStefan Weinhuber cqr = dasd_eckd_build_cp(startdev, block, req); 43978e09f215SStefan Weinhuber if (IS_ERR(cqr)) 43988e09f215SStefan Weinhuber private->count--; 43998e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(startdev->cdev), flags); 44008e09f215SStefan Weinhuber return cqr; 44018e09f215SStefan Weinhuber } 44028e09f215SStefan Weinhuber 44038e09f215SStefan Weinhuber static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr, 44048e09f215SStefan Weinhuber struct request *req) 44058e09f215SStefan Weinhuber { 44068e09f215SStefan Weinhuber struct dasd_eckd_private *private; 44078e09f215SStefan Weinhuber unsigned long flags; 44088e09f215SStefan Weinhuber 44098e09f215SStefan Weinhuber spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags); 4410543691a4SSebastian Ott private = cqr->memdev->private; 44118e09f215SStefan Weinhuber private->count--; 44128e09f215SStefan Weinhuber spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags); 44138e09f215SStefan Weinhuber return dasd_eckd_free_cp(cqr, req); 44148e09f215SStefan Weinhuber } 44158e09f215SStefan Weinhuber 44161da177e4SLinus Torvalds static int 44171da177e4SLinus Torvalds dasd_eckd_fill_info(struct dasd_device * device, 44181da177e4SLinus Torvalds struct dasd_information2_t * info) 44191da177e4SLinus Torvalds { 4420543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 44211da177e4SLinus Torvalds 44221da177e4SLinus Torvalds info->label_block = 2; 44231da177e4SLinus Torvalds info->FBA_layout = private->uses_cdl ? 0 : 1; 44241da177e4SLinus Torvalds info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL; 4425543691a4SSebastian Ott info->characteristics_size = sizeof(private->rdc_data); 44261da177e4SLinus Torvalds memcpy(info->characteristics, &private->rdc_data, 4427543691a4SSebastian Ott sizeof(private->rdc_data)); 44284abb08c2SStefan Weinhuber info->confdata_size = min((unsigned long)private->conf_len, 44294abb08c2SStefan Weinhuber sizeof(info->configuration_data)); 44304abb08c2SStefan Weinhuber memcpy(info->configuration_data, private->conf_data, 44314abb08c2SStefan Weinhuber info->confdata_size); 44321da177e4SLinus Torvalds return 0; 44331da177e4SLinus Torvalds } 44341da177e4SLinus Torvalds 44351da177e4SLinus Torvalds /* 44361da177e4SLinus Torvalds * SECTION: ioctl functions for eckd devices. 44371da177e4SLinus Torvalds */ 44381da177e4SLinus Torvalds 44391da177e4SLinus Torvalds /* 44401da177e4SLinus Torvalds * Release device ioctl. 44411da177e4SLinus Torvalds * Buils a channel programm to releases a prior reserved 44421da177e4SLinus Torvalds * (see dasd_eckd_reserve) device. 44431da177e4SLinus Torvalds */ 44441da177e4SLinus Torvalds static int 44451107ccfbSChristoph Hellwig dasd_eckd_release(struct dasd_device *device) 44461da177e4SLinus Torvalds { 44471da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 44481da177e4SLinus Torvalds int rc; 4449f3eb5384SStefan Weinhuber struct ccw1 *ccw; 4450f932bceaSStefan Weinhuber int useglobal; 44511da177e4SLinus Torvalds 44521da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 44531da177e4SLinus Torvalds return -EACCES; 44541da177e4SLinus Torvalds 4455f932bceaSStefan Weinhuber useglobal = 0; 4456c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); 44571da177e4SLinus Torvalds if (IS_ERR(cqr)) { 4458f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 4459f932bceaSStefan Weinhuber useglobal = 1; 4460f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 4461f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 4462f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 4463f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 4464f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 4465f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 4466f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 44671da177e4SLinus Torvalds } 4468f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 4469f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RELEASE; 4470f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4471f3eb5384SStefan Weinhuber ccw->count = 32; 4472f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 44738e09f215SStefan Weinhuber cqr->startdev = device; 44748e09f215SStefan Weinhuber cqr->memdev = device; 44751da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 44761c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4477336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 44781da177e4SLinus Torvalds cqr->expires = 2 * HZ; 44791aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 44801da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 44811da177e4SLinus Torvalds 44821da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 44835a27e60dSStefan Weinhuber if (!rc) 44845a27e60dSStefan Weinhuber clear_bit(DASD_FLAG_IS_RESERVED, &device->flags); 44851da177e4SLinus Torvalds 4486f932bceaSStefan Weinhuber if (useglobal) 4487f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 4488f932bceaSStefan Weinhuber else 44898e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 44901da177e4SLinus Torvalds return rc; 44911da177e4SLinus Torvalds } 44921da177e4SLinus Torvalds 44931da177e4SLinus Torvalds /* 44941da177e4SLinus Torvalds * Reserve device ioctl. 44951da177e4SLinus Torvalds * Options are set to 'synchronous wait for interrupt' and 44961da177e4SLinus Torvalds * 'timeout the request'. This leads to a terminate IO if 44971da177e4SLinus Torvalds * the interrupt is outstanding for a certain time. 44981da177e4SLinus Torvalds */ 44991da177e4SLinus Torvalds static int 45001107ccfbSChristoph Hellwig dasd_eckd_reserve(struct dasd_device *device) 45011da177e4SLinus Torvalds { 45021da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 45031da177e4SLinus Torvalds int rc; 4504f3eb5384SStefan Weinhuber struct ccw1 *ccw; 4505f932bceaSStefan Weinhuber int useglobal; 45061da177e4SLinus Torvalds 45071da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 45081da177e4SLinus Torvalds return -EACCES; 45091da177e4SLinus Torvalds 4510f932bceaSStefan Weinhuber useglobal = 0; 4511c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); 45121da177e4SLinus Torvalds if (IS_ERR(cqr)) { 4513f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 4514f932bceaSStefan Weinhuber useglobal = 1; 4515f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 4516f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 4517f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 4518f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 4519f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 4520f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 4521f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 45221da177e4SLinus Torvalds } 4523f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 4524f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_RESERVE; 4525f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4526f3eb5384SStefan Weinhuber ccw->count = 32; 4527f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 45288e09f215SStefan Weinhuber cqr->startdev = device; 45298e09f215SStefan Weinhuber cqr->memdev = device; 45301da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 45311c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4532336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 45331da177e4SLinus Torvalds cqr->expires = 2 * HZ; 45341aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 45351da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 45361da177e4SLinus Torvalds 45371da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 45385a27e60dSStefan Weinhuber if (!rc) 45395a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 45401da177e4SLinus Torvalds 4541f932bceaSStefan Weinhuber if (useglobal) 4542f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 4543f932bceaSStefan Weinhuber else 45448e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 45451da177e4SLinus Torvalds return rc; 45461da177e4SLinus Torvalds } 45471da177e4SLinus Torvalds 45481da177e4SLinus Torvalds /* 45491da177e4SLinus Torvalds * Steal lock ioctl - unconditional reserve device. 45501da177e4SLinus Torvalds * Buils a channel programm to break a device's reservation. 45511da177e4SLinus Torvalds * (unconditional reserve) 45521da177e4SLinus Torvalds */ 45531da177e4SLinus Torvalds static int 45541107ccfbSChristoph Hellwig dasd_eckd_steal_lock(struct dasd_device *device) 45551da177e4SLinus Torvalds { 45561da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 45571da177e4SLinus Torvalds int rc; 4558f3eb5384SStefan Weinhuber struct ccw1 *ccw; 4559f932bceaSStefan Weinhuber int useglobal; 45601da177e4SLinus Torvalds 45611da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 45621da177e4SLinus Torvalds return -EACCES; 45631da177e4SLinus Torvalds 4564f932bceaSStefan Weinhuber useglobal = 0; 4565c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 32, device, NULL); 45661da177e4SLinus Torvalds if (IS_ERR(cqr)) { 4567f932bceaSStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 4568f932bceaSStefan Weinhuber useglobal = 1; 4569f932bceaSStefan Weinhuber cqr = &dasd_reserve_req->cqr; 4570f932bceaSStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 4571f932bceaSStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 4572f932bceaSStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 4573f932bceaSStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 4574f932bceaSStefan Weinhuber cqr->data = &dasd_reserve_req->data; 4575f932bceaSStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 45761da177e4SLinus Torvalds } 4577f3eb5384SStefan Weinhuber ccw = cqr->cpaddr; 4578f3eb5384SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SLCK; 4579f3eb5384SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4580f3eb5384SStefan Weinhuber ccw->count = 32; 4581f3eb5384SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 45828e09f215SStefan Weinhuber cqr->startdev = device; 45838e09f215SStefan Weinhuber cqr->memdev = device; 45841da177e4SLinus Torvalds clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 45851c01b8a5SHorst Hummel set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 4586336c340bSHorst Hummel cqr->retries = 2; /* set retry counter to enable basic ERP */ 45871da177e4SLinus Torvalds cqr->expires = 2 * HZ; 45881aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 45891da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 45901da177e4SLinus Torvalds 45911da177e4SLinus Torvalds rc = dasd_sleep_on_immediatly(cqr); 45925a27e60dSStefan Weinhuber if (!rc) 45935a27e60dSStefan Weinhuber set_bit(DASD_FLAG_IS_RESERVED, &device->flags); 45941da177e4SLinus Torvalds 4595f932bceaSStefan Weinhuber if (useglobal) 4596f932bceaSStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 4597f932bceaSStefan Weinhuber else 45988e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 45991da177e4SLinus Torvalds return rc; 46001da177e4SLinus Torvalds } 46011da177e4SLinus Torvalds 46021da177e4SLinus Torvalds /* 4603196339f1SStefan Weinhuber * SNID - Sense Path Group ID 4604196339f1SStefan Weinhuber * This ioctl may be used in situations where I/O is stalled due to 4605196339f1SStefan Weinhuber * a reserve, so if the normal dasd_smalloc_request fails, we use the 4606196339f1SStefan Weinhuber * preallocated dasd_reserve_req. 4607196339f1SStefan Weinhuber */ 4608196339f1SStefan Weinhuber static int dasd_eckd_snid(struct dasd_device *device, 4609196339f1SStefan Weinhuber void __user *argp) 4610196339f1SStefan Weinhuber { 4611196339f1SStefan Weinhuber struct dasd_ccw_req *cqr; 4612196339f1SStefan Weinhuber int rc; 4613196339f1SStefan Weinhuber struct ccw1 *ccw; 4614196339f1SStefan Weinhuber int useglobal; 4615196339f1SStefan Weinhuber struct dasd_snid_ioctl_data usrparm; 4616196339f1SStefan Weinhuber 4617196339f1SStefan Weinhuber if (!capable(CAP_SYS_ADMIN)) 4618196339f1SStefan Weinhuber return -EACCES; 4619196339f1SStefan Weinhuber 4620196339f1SStefan Weinhuber if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 4621196339f1SStefan Weinhuber return -EFAULT; 4622196339f1SStefan Weinhuber 4623196339f1SStefan Weinhuber useglobal = 0; 4624196339f1SStefan Weinhuber cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1, 4625c5205f2fSSebastian Ott sizeof(struct dasd_snid_data), device, 4626c5205f2fSSebastian Ott NULL); 4627196339f1SStefan Weinhuber if (IS_ERR(cqr)) { 4628196339f1SStefan Weinhuber mutex_lock(&dasd_reserve_mutex); 4629196339f1SStefan Weinhuber useglobal = 1; 4630196339f1SStefan Weinhuber cqr = &dasd_reserve_req->cqr; 4631196339f1SStefan Weinhuber memset(cqr, 0, sizeof(*cqr)); 4632196339f1SStefan Weinhuber memset(&dasd_reserve_req->ccw, 0, 4633196339f1SStefan Weinhuber sizeof(dasd_reserve_req->ccw)); 4634196339f1SStefan Weinhuber cqr->cpaddr = &dasd_reserve_req->ccw; 4635196339f1SStefan Weinhuber cqr->data = &dasd_reserve_req->data; 4636196339f1SStefan Weinhuber cqr->magic = DASD_ECKD_MAGIC; 4637196339f1SStefan Weinhuber } 4638196339f1SStefan Weinhuber ccw = cqr->cpaddr; 4639196339f1SStefan Weinhuber ccw->cmd_code = DASD_ECKD_CCW_SNID; 4640196339f1SStefan Weinhuber ccw->flags |= CCW_FLAG_SLI; 4641196339f1SStefan Weinhuber ccw->count = 12; 4642196339f1SStefan Weinhuber ccw->cda = (__u32)(addr_t) cqr->data; 4643196339f1SStefan Weinhuber cqr->startdev = device; 4644196339f1SStefan Weinhuber cqr->memdev = device; 4645196339f1SStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 4646196339f1SStefan Weinhuber set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags); 46475a27e60dSStefan Weinhuber set_bit(DASD_CQR_ALLOW_SLOCK, &cqr->flags); 4648196339f1SStefan Weinhuber cqr->retries = 5; 4649196339f1SStefan Weinhuber cqr->expires = 10 * HZ; 46501aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 4651196339f1SStefan Weinhuber cqr->status = DASD_CQR_FILLED; 4652196339f1SStefan Weinhuber cqr->lpm = usrparm.path_mask; 4653196339f1SStefan Weinhuber 4654196339f1SStefan Weinhuber rc = dasd_sleep_on_immediatly(cqr); 4655196339f1SStefan Weinhuber /* verify that I/O processing didn't modify the path mask */ 4656196339f1SStefan Weinhuber if (!rc && usrparm.path_mask && (cqr->lpm != usrparm.path_mask)) 4657196339f1SStefan Weinhuber rc = -EIO; 4658196339f1SStefan Weinhuber if (!rc) { 4659196339f1SStefan Weinhuber usrparm.data = *((struct dasd_snid_data *)cqr->data); 4660196339f1SStefan Weinhuber if (copy_to_user(argp, &usrparm, sizeof(usrparm))) 4661196339f1SStefan Weinhuber rc = -EFAULT; 4662196339f1SStefan Weinhuber } 4663196339f1SStefan Weinhuber 4664196339f1SStefan Weinhuber if (useglobal) 4665196339f1SStefan Weinhuber mutex_unlock(&dasd_reserve_mutex); 4666196339f1SStefan Weinhuber else 4667196339f1SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 4668196339f1SStefan Weinhuber return rc; 4669196339f1SStefan Weinhuber } 4670196339f1SStefan Weinhuber 4671196339f1SStefan Weinhuber /* 46721da177e4SLinus Torvalds * Read performance statistics 46731da177e4SLinus Torvalds */ 46741da177e4SLinus Torvalds static int 46751107ccfbSChristoph Hellwig dasd_eckd_performance(struct dasd_device *device, void __user *argp) 46761da177e4SLinus Torvalds { 46771da177e4SLinus Torvalds struct dasd_psf_prssd_data *prssdp; 46781da177e4SLinus Torvalds struct dasd_rssd_perf_stats_t *stats; 46791da177e4SLinus Torvalds struct dasd_ccw_req *cqr; 46801da177e4SLinus Torvalds struct ccw1 *ccw; 46811da177e4SLinus Torvalds int rc; 46821da177e4SLinus Torvalds 468368b781feSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 46841da177e4SLinus Torvalds (sizeof(struct dasd_psf_prssd_data) + 46851da177e4SLinus Torvalds sizeof(struct dasd_rssd_perf_stats_t)), 4686c5205f2fSSebastian Ott device, NULL); 46871da177e4SLinus Torvalds if (IS_ERR(cqr)) { 4688fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 46891da177e4SLinus Torvalds "Could not allocate initialization request"); 46901da177e4SLinus Torvalds return PTR_ERR(cqr); 46911da177e4SLinus Torvalds } 46928e09f215SStefan Weinhuber cqr->startdev = device; 46938e09f215SStefan Weinhuber cqr->memdev = device; 46941da177e4SLinus Torvalds cqr->retries = 0; 4695eb6e199bSStefan Weinhuber clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 46961da177e4SLinus Torvalds cqr->expires = 10 * HZ; 46971da177e4SLinus Torvalds 46981da177e4SLinus Torvalds /* Prepare for Read Subsystem Data */ 46991da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 47001da177e4SLinus Torvalds memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 47011da177e4SLinus Torvalds prssdp->order = PSF_ORDER_PRSSD; 47025d67d164SJoe Perches prssdp->suborder = 0x01; /* Performance Statistics */ 47031da177e4SLinus Torvalds prssdp->varies[1] = 0x01; /* Perf Statistics for the Subsystem */ 47041da177e4SLinus Torvalds 47051da177e4SLinus Torvalds ccw = cqr->cpaddr; 47061da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_PSF; 47071da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_psf_prssd_data); 47081da177e4SLinus Torvalds ccw->flags |= CCW_FLAG_CC; 47091da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) prssdp; 47101da177e4SLinus Torvalds 47111da177e4SLinus Torvalds /* Read Subsystem Data - Performance Statistics */ 47121da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 47131da177e4SLinus Torvalds memset(stats, 0, sizeof(struct dasd_rssd_perf_stats_t)); 47141da177e4SLinus Torvalds 47151da177e4SLinus Torvalds ccw++; 47161da177e4SLinus Torvalds ccw->cmd_code = DASD_ECKD_CCW_RSSD; 47171da177e4SLinus Torvalds ccw->count = sizeof(struct dasd_rssd_perf_stats_t); 47181da177e4SLinus Torvalds ccw->cda = (__u32)(addr_t) stats; 47191da177e4SLinus Torvalds 47201aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 47211da177e4SLinus Torvalds cqr->status = DASD_CQR_FILLED; 47221da177e4SLinus Torvalds rc = dasd_sleep_on(cqr); 47231da177e4SLinus Torvalds if (rc == 0) { 47241da177e4SLinus Torvalds prssdp = (struct dasd_psf_prssd_data *) cqr->data; 47251da177e4SLinus Torvalds stats = (struct dasd_rssd_perf_stats_t *) (prssdp + 1); 47261107ccfbSChristoph Hellwig if (copy_to_user(argp, stats, 47271107ccfbSChristoph Hellwig sizeof(struct dasd_rssd_perf_stats_t))) 47281107ccfbSChristoph Hellwig rc = -EFAULT; 47291da177e4SLinus Torvalds } 47308e09f215SStefan Weinhuber dasd_sfree_request(cqr, cqr->memdev); 47311da177e4SLinus Torvalds return rc; 47321da177e4SLinus Torvalds } 47331da177e4SLinus Torvalds 47341da177e4SLinus Torvalds /* 47351da177e4SLinus Torvalds * Get attributes (cache operations) 47361da177e4SLinus Torvalds * Returnes the cache attributes used in Define Extend (DE). 47371da177e4SLinus Torvalds */ 47381da177e4SLinus Torvalds static int 47391107ccfbSChristoph Hellwig dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp) 47401da177e4SLinus Torvalds { 4741543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 47421107ccfbSChristoph Hellwig struct attrib_data_t attrib = private->attrib; 47431da177e4SLinus Torvalds int rc; 47441da177e4SLinus Torvalds 47451da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 47461da177e4SLinus Torvalds return -EACCES; 47471107ccfbSChristoph Hellwig if (!argp) 47481da177e4SLinus Torvalds return -EINVAL; 47491da177e4SLinus Torvalds 47501107ccfbSChristoph Hellwig rc = 0; 47511107ccfbSChristoph Hellwig if (copy_to_user(argp, (long *) &attrib, 47521107ccfbSChristoph Hellwig sizeof(struct attrib_data_t))) 47531107ccfbSChristoph Hellwig rc = -EFAULT; 47541da177e4SLinus Torvalds 47551da177e4SLinus Torvalds return rc; 47561da177e4SLinus Torvalds } 47571da177e4SLinus Torvalds 47581da177e4SLinus Torvalds /* 47591da177e4SLinus Torvalds * Set attributes (cache operations) 47601da177e4SLinus Torvalds * Stores the attributes for cache operation to be used in Define Extend (DE). 47611da177e4SLinus Torvalds */ 47621da177e4SLinus Torvalds static int 47631107ccfbSChristoph Hellwig dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp) 47641da177e4SLinus Torvalds { 4765543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 47661da177e4SLinus Torvalds struct attrib_data_t attrib; 47671da177e4SLinus Torvalds 47681da177e4SLinus Torvalds if (!capable(CAP_SYS_ADMIN)) 47691da177e4SLinus Torvalds return -EACCES; 47701107ccfbSChristoph Hellwig if (!argp) 47711da177e4SLinus Torvalds return -EINVAL; 47721da177e4SLinus Torvalds 47731107ccfbSChristoph Hellwig if (copy_from_user(&attrib, argp, sizeof(struct attrib_data_t))) 47741da177e4SLinus Torvalds return -EFAULT; 47751da177e4SLinus Torvalds private->attrib = attrib; 47761da177e4SLinus Torvalds 4777fc19f381SStefan Haberland dev_info(&device->cdev->dev, 4778fc19f381SStefan Haberland "The DASD cache mode was set to %x (%i cylinder prestage)\n", 47791da177e4SLinus Torvalds private->attrib.operation, private->attrib.nr_cyl); 47801da177e4SLinus Torvalds return 0; 47811da177e4SLinus Torvalds } 47821da177e4SLinus Torvalds 4783ab1d848fSNigel Hislop /* 4784ab1d848fSNigel Hislop * Issue syscall I/O to EMC Symmetrix array. 4785ab1d848fSNigel Hislop * CCWs are PSF and RSSD 4786ab1d848fSNigel Hislop */ 4787ab1d848fSNigel Hislop static int dasd_symm_io(struct dasd_device *device, void __user *argp) 4788ab1d848fSNigel Hislop { 4789ab1d848fSNigel Hislop struct dasd_symmio_parms usrparm; 4790ab1d848fSNigel Hislop char *psf_data, *rssd_result; 4791ab1d848fSNigel Hislop struct dasd_ccw_req *cqr; 4792ab1d848fSNigel Hislop struct ccw1 *ccw; 479352898025SNigel Hislop char psf0, psf1; 4794ab1d848fSNigel Hislop int rc; 4795ab1d848fSNigel Hislop 479652898025SNigel Hislop if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) 479752898025SNigel Hislop return -EACCES; 479852898025SNigel Hislop psf0 = psf1 = 0; 479952898025SNigel Hislop 4800ab1d848fSNigel Hislop /* Copy parms from caller */ 4801ab1d848fSNigel Hislop rc = -EFAULT; 4802ab1d848fSNigel Hislop if (copy_from_user(&usrparm, argp, sizeof(usrparm))) 4803ab1d848fSNigel Hislop goto out; 480492d62891SHeiko Carstens if (is_compat_task()) { 4805ab1d848fSNigel Hislop /* Make sure pointers are sane even on 31 bit. */ 4806ab1d848fSNigel Hislop rc = -EINVAL; 4807f8b06859SHeiko Carstens if ((usrparm.psf_data >> 32) != 0) 4808ab1d848fSNigel Hislop goto out; 4809f8b06859SHeiko Carstens if ((usrparm.rssd_result >> 32) != 0) 4810f8b06859SHeiko Carstens goto out; 4811f8b06859SHeiko Carstens usrparm.psf_data &= 0x7fffffffULL; 4812f8b06859SHeiko Carstens usrparm.rssd_result &= 0x7fffffffULL; 4813ab1d848fSNigel Hislop } 48144a8ef699SStefan Haberland /* at least 2 bytes are accessed and should be allocated */ 48154a8ef699SStefan Haberland if (usrparm.psf_data_len < 2) { 48164a8ef699SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, 48174a8ef699SStefan Haberland "Symmetrix ioctl invalid data length %d", 48184a8ef699SStefan Haberland usrparm.psf_data_len); 48194a8ef699SStefan Haberland rc = -EINVAL; 48204a8ef699SStefan Haberland goto out; 48214a8ef699SStefan Haberland } 4822ab1d848fSNigel Hislop /* alloc I/O data area */ 4823ab1d848fSNigel Hislop psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA); 4824ab1d848fSNigel Hislop rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA); 4825ab1d848fSNigel Hislop if (!psf_data || !rssd_result) { 4826ab1d848fSNigel Hislop rc = -ENOMEM; 4827ab1d848fSNigel Hislop goto out_free; 4828ab1d848fSNigel Hislop } 4829ab1d848fSNigel Hislop 4830ab1d848fSNigel Hislop /* get syscall header from user space */ 4831ab1d848fSNigel Hislop rc = -EFAULT; 4832ab1d848fSNigel Hislop if (copy_from_user(psf_data, 4833ab1d848fSNigel Hislop (void __user *)(unsigned long) usrparm.psf_data, 4834ab1d848fSNigel Hislop usrparm.psf_data_len)) 4835ab1d848fSNigel Hislop goto out_free; 483652898025SNigel Hislop psf0 = psf_data[0]; 483752898025SNigel Hislop psf1 = psf_data[1]; 4838ab1d848fSNigel Hislop 4839ab1d848fSNigel Hislop /* setup CCWs for PSF + RSSD */ 4840c5205f2fSSebastian Ott cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2, 0, device, NULL); 4841ab1d848fSNigel Hislop if (IS_ERR(cqr)) { 4842fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 4843ab1d848fSNigel Hislop "Could not allocate initialization request"); 4844ab1d848fSNigel Hislop rc = PTR_ERR(cqr); 4845ab1d848fSNigel Hislop goto out_free; 4846ab1d848fSNigel Hislop } 4847ab1d848fSNigel Hislop 4848ab1d848fSNigel Hislop cqr->startdev = device; 4849ab1d848fSNigel Hislop cqr->memdev = device; 4850ab1d848fSNigel Hislop cqr->retries = 3; 4851ab1d848fSNigel Hislop cqr->expires = 10 * HZ; 48521aae0560SHeiko Carstens cqr->buildclk = get_tod_clock(); 4853ab1d848fSNigel Hislop cqr->status = DASD_CQR_FILLED; 4854ab1d848fSNigel Hislop 4855ab1d848fSNigel Hislop /* Build the ccws */ 4856ab1d848fSNigel Hislop ccw = cqr->cpaddr; 4857ab1d848fSNigel Hislop 4858ab1d848fSNigel Hislop /* PSF ccw */ 4859ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_PSF; 4860ab1d848fSNigel Hislop ccw->count = usrparm.psf_data_len; 4861ab1d848fSNigel Hislop ccw->flags |= CCW_FLAG_CC; 4862ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) psf_data; 4863ab1d848fSNigel Hislop 4864ab1d848fSNigel Hislop ccw++; 4865ab1d848fSNigel Hislop 4866ab1d848fSNigel Hislop /* RSSD ccw */ 4867ab1d848fSNigel Hislop ccw->cmd_code = DASD_ECKD_CCW_RSSD; 4868ab1d848fSNigel Hislop ccw->count = usrparm.rssd_result_len; 4869ab1d848fSNigel Hislop ccw->flags = CCW_FLAG_SLI ; 4870ab1d848fSNigel Hislop ccw->cda = (__u32)(addr_t) rssd_result; 4871ab1d848fSNigel Hislop 4872ab1d848fSNigel Hislop rc = dasd_sleep_on(cqr); 4873ab1d848fSNigel Hislop if (rc) 4874ab1d848fSNigel Hislop goto out_sfree; 4875ab1d848fSNigel Hislop 4876ab1d848fSNigel Hislop rc = -EFAULT; 4877ab1d848fSNigel Hislop if (copy_to_user((void __user *)(unsigned long) usrparm.rssd_result, 4878ab1d848fSNigel Hislop rssd_result, usrparm.rssd_result_len)) 4879ab1d848fSNigel Hislop goto out_sfree; 4880ab1d848fSNigel Hislop rc = 0; 4881ab1d848fSNigel Hislop 4882ab1d848fSNigel Hislop out_sfree: 4883ab1d848fSNigel Hislop dasd_sfree_request(cqr, cqr->memdev); 4884ab1d848fSNigel Hislop out_free: 4885ab1d848fSNigel Hislop kfree(rssd_result); 4886ab1d848fSNigel Hislop kfree(psf_data); 4887ab1d848fSNigel Hislop out: 488852898025SNigel Hislop DBF_DEV_EVENT(DBF_WARNING, device, 488952898025SNigel Hislop "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", 489052898025SNigel Hislop (int) psf0, (int) psf1, rc); 4891ab1d848fSNigel Hislop return rc; 4892ab1d848fSNigel Hislop } 4893ab1d848fSNigel Hislop 48941107ccfbSChristoph Hellwig static int 48958e09f215SStefan Weinhuber dasd_eckd_ioctl(struct dasd_block *block, unsigned int cmd, void __user *argp) 48961107ccfbSChristoph Hellwig { 48978e09f215SStefan Weinhuber struct dasd_device *device = block->base; 48988e09f215SStefan Weinhuber 48991107ccfbSChristoph Hellwig switch (cmd) { 49001107ccfbSChristoph Hellwig case BIODASDGATTR: 49011107ccfbSChristoph Hellwig return dasd_eckd_get_attrib(device, argp); 49021107ccfbSChristoph Hellwig case BIODASDSATTR: 49031107ccfbSChristoph Hellwig return dasd_eckd_set_attrib(device, argp); 49041107ccfbSChristoph Hellwig case BIODASDPSRD: 49051107ccfbSChristoph Hellwig return dasd_eckd_performance(device, argp); 49061107ccfbSChristoph Hellwig case BIODASDRLSE: 49071107ccfbSChristoph Hellwig return dasd_eckd_release(device); 49081107ccfbSChristoph Hellwig case BIODASDRSRV: 49091107ccfbSChristoph Hellwig return dasd_eckd_reserve(device); 49101107ccfbSChristoph Hellwig case BIODASDSLCK: 49111107ccfbSChristoph Hellwig return dasd_eckd_steal_lock(device); 4912196339f1SStefan Weinhuber case BIODASDSNID: 4913196339f1SStefan Weinhuber return dasd_eckd_snid(device, argp); 4914ab1d848fSNigel Hislop case BIODASDSYMMIO: 4915ab1d848fSNigel Hislop return dasd_symm_io(device, argp); 49161107ccfbSChristoph Hellwig default: 49176b79d14eSHeiko Carstens return -ENOTTY; 49181107ccfbSChristoph Hellwig } 49191107ccfbSChristoph Hellwig } 49201107ccfbSChristoph Hellwig 49211da177e4SLinus Torvalds /* 4922445b5b49SHorst Hummel * Dump the range of CCWs into 'page' buffer 4923445b5b49SHorst Hummel * and return number of printed chars. 4924445b5b49SHorst Hummel */ 49254d284cacSHeiko Carstens static int 4926445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(struct ccw1 *from, struct ccw1 *to, char *page) 4927445b5b49SHorst Hummel { 4928445b5b49SHorst Hummel int len, count; 4929445b5b49SHorst Hummel char *datap; 4930445b5b49SHorst Hummel 4931445b5b49SHorst Hummel len = 0; 4932445b5b49SHorst Hummel while (from <= to) { 4933773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4934445b5b49SHorst Hummel " CCW %p: %08X %08X DAT:", 4935445b5b49SHorst Hummel from, ((int *) from)[0], ((int *) from)[1]); 4936445b5b49SHorst Hummel 4937445b5b49SHorst Hummel /* get pointer to data (consider IDALs) */ 4938445b5b49SHorst Hummel if (from->flags & CCW_FLAG_IDA) 4939445b5b49SHorst Hummel datap = (char *) *((addr_t *) (addr_t) from->cda); 4940445b5b49SHorst Hummel else 4941445b5b49SHorst Hummel datap = (char *) ((addr_t) from->cda); 4942445b5b49SHorst Hummel 4943445b5b49SHorst Hummel /* dump data (max 32 bytes) */ 4944445b5b49SHorst Hummel for (count = 0; count < from->count && count < 32; count++) { 4945445b5b49SHorst Hummel if (count % 8 == 0) len += sprintf(page + len, " "); 4946445b5b49SHorst Hummel if (count % 4 == 0) len += sprintf(page + len, " "); 4947445b5b49SHorst Hummel len += sprintf(page + len, "%02x", datap[count]); 4948445b5b49SHorst Hummel } 4949445b5b49SHorst Hummel len += sprintf(page + len, "\n"); 4950445b5b49SHorst Hummel from++; 4951445b5b49SHorst Hummel } 4952445b5b49SHorst Hummel return len; 4953445b5b49SHorst Hummel } 4954445b5b49SHorst Hummel 4955fc19f381SStefan Haberland static void 4956aeec92caSStefan Haberland dasd_eckd_dump_sense_dbf(struct dasd_device *device, struct irb *irb, 4957aeec92caSStefan Haberland char *reason) 4958fc19f381SStefan Haberland { 4959fc19f381SStefan Haberland u64 *sense; 4960a5a0061fSStefan Weinhuber u64 *stat; 4961fc19f381SStefan Haberland 4962aeec92caSStefan Haberland sense = (u64 *) dasd_get_sense(irb); 4963a5a0061fSStefan Weinhuber stat = (u64 *) &irb->scsw; 4964fc19f381SStefan Haberland if (sense) { 4965a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : " 4966a5a0061fSStefan Weinhuber "%016llx %016llx %016llx %016llx", 4967a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 4968ed3640b2SStefan Haberland sense[0], sense[1], sense[2], sense[3]); 4969fc19f381SStefan Haberland } else { 4970a5a0061fSStefan Weinhuber DBF_DEV_EVENT(DBF_EMERG, device, "%s: %016llx %08x : %s", 4971a5a0061fSStefan Weinhuber reason, *stat, *((u32 *) (stat + 1)), 4972a5a0061fSStefan Weinhuber "NO VALID SENSE"); 4973fc19f381SStefan Haberland } 4974fc19f381SStefan Haberland } 4975fc19f381SStefan Haberland 4976445b5b49SHorst Hummel /* 49771da177e4SLinus Torvalds * Print sense data and related channel program. 49781da177e4SLinus Torvalds * Parts are printed because printk buffer is only 1024 bytes. 49791da177e4SLinus Torvalds */ 4980f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_ccw(struct dasd_device *device, 49818e09f215SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 49821da177e4SLinus Torvalds { 49831da177e4SLinus Torvalds char *page; 4984445b5b49SHorst Hummel struct ccw1 *first, *last, *fail, *from, *to; 4985445b5b49SHorst Hummel int len, sl, sct; 49861da177e4SLinus Torvalds 49871da177e4SLinus Torvalds page = (char *) get_zeroed_page(GFP_ATOMIC); 49881da177e4SLinus Torvalds if (page == NULL) { 4989fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 4990fc19f381SStefan Haberland "No memory to dump sense data\n"); 49911da177e4SLinus Torvalds return; 49921da177e4SLinus Torvalds } 4993445b5b49SHorst Hummel /* dump the sense data */ 4994773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 49951da177e4SLinus Torvalds " I/O status report for device %s:\n", 49962a0217d5SKay Sievers dev_name(&device->cdev->dev)); 4997773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 4998a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 4999a5a0061fSStefan Weinhuber "CS:%02X RC:%d\n", 5000a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 5001a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 5002a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 5003a5a0061fSStefan Weinhuber req ? req->intrc : 0); 5004773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 50051da177e4SLinus Torvalds " device %s: Failing CCW: %p\n", 50062a0217d5SKay Sievers dev_name(&device->cdev->dev), 500723d805b6SPeter Oberparleiter (void *) (addr_t) irb->scsw.cmd.cpa); 50081da177e4SLinus Torvalds if (irb->esw.esw0.erw.cons) { 50091da177e4SLinus Torvalds for (sl = 0; sl < 4; sl++) { 5010773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 50111da177e4SLinus Torvalds " Sense(hex) %2d-%2d:", 50121da177e4SLinus Torvalds (8 * sl), ((8 * sl) + 7)); 50131da177e4SLinus Torvalds 50141da177e4SLinus Torvalds for (sct = 0; sct < 8; sct++) { 50151da177e4SLinus Torvalds len += sprintf(page + len, " %02x", 50161da177e4SLinus Torvalds irb->ecw[8 * sl + sct]); 50171da177e4SLinus Torvalds } 50181da177e4SLinus Torvalds len += sprintf(page + len, "\n"); 50191da177e4SLinus Torvalds } 50201da177e4SLinus Torvalds 50211da177e4SLinus Torvalds if (irb->ecw[27] & DASD_SENSE_BIT_0) { 50221da177e4SLinus Torvalds /* 24 Byte Sense Data */ 5023773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 50241da177e4SLinus Torvalds " 24 Byte: %x MSG %x, " 50251da177e4SLinus Torvalds "%s MSGb to SYSOP\n", 50261da177e4SLinus Torvalds irb->ecw[7] >> 4, irb->ecw[7] & 0x0f, 50271da177e4SLinus Torvalds irb->ecw[1] & 0x10 ? "" : "no"); 50281da177e4SLinus Torvalds } else { 50291da177e4SLinus Torvalds /* 32 Byte Sense Data */ 5030773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 50311da177e4SLinus Torvalds " 32 Byte: Format: %x " 50321da177e4SLinus Torvalds "Exception class %x\n", 50331da177e4SLinus Torvalds irb->ecw[6] & 0x0f, irb->ecw[22] >> 4); 50341da177e4SLinus Torvalds } 50351da177e4SLinus Torvalds } else { 5036773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 50371da177e4SLinus Torvalds " SORRY - NO VALID SENSE AVAILABLE\n"); 50381da177e4SLinus Torvalds } 5039773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 50401da177e4SLinus Torvalds 50418e09f215SStefan Weinhuber if (req) { 50428e09f215SStefan Weinhuber /* req == NULL for unsolicited interrupts */ 5043445b5b49SHorst Hummel /* dump the Channel Program (max 140 Bytes per line) */ 5044445b5b49SHorst Hummel /* Count CCW and print first CCWs (maximum 1024 % 140 = 7) */ 5045445b5b49SHorst Hummel first = req->cpaddr; 5046445b5b49SHorst Hummel for (last = first; last->flags & (CCW_FLAG_CC | CCW_FLAG_DC); last++); 5047445b5b49SHorst Hummel to = min(first + 6, last); 5048773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 50491da177e4SLinus Torvalds " Related CP in req: %p\n", req); 5050445b5b49SHorst Hummel dasd_eckd_dump_ccw_range(first, to, page + len); 5051773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 50521da177e4SLinus Torvalds 5053445b5b49SHorst Hummel /* print failing CCW area (maximum 4) */ 5054445b5b49SHorst Hummel /* scsw->cda is either valid or zero */ 50551da177e4SLinus Torvalds len = 0; 5056445b5b49SHorst Hummel from = ++to; 505723d805b6SPeter Oberparleiter fail = (struct ccw1 *)(addr_t) 505823d805b6SPeter Oberparleiter irb->scsw.cmd.cpa; /* failing CCW */ 5059445b5b49SHorst Hummel if (from < fail - 2) { 5060445b5b49SHorst Hummel from = fail - 2; /* there is a gap - print header */ 5061773bab4aSSebastian Ott len += sprintf(page, PRINTK_HEADER "......\n"); 50621da177e4SLinus Torvalds } 5063445b5b49SHorst Hummel to = min(fail + 1, last); 5064445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, to, page + len); 50651da177e4SLinus Torvalds 5066445b5b49SHorst Hummel /* print last CCWs (maximum 2) */ 5067445b5b49SHorst Hummel from = max(from, ++to); 5068445b5b49SHorst Hummel if (from < last - 1) { 5069445b5b49SHorst Hummel from = last - 1; /* there is a gap - print header */ 5070773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER "......\n"); 50711da177e4SLinus Torvalds } 5072445b5b49SHorst Hummel len += dasd_eckd_dump_ccw_range(from, last, page + len); 50731da177e4SLinus Torvalds if (len > 0) 5074773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 50758e09f215SStefan Weinhuber } 50761da177e4SLinus Torvalds free_page((unsigned long) page); 50771da177e4SLinus Torvalds } 50781da177e4SLinus Torvalds 5079f3eb5384SStefan Weinhuber 5080f3eb5384SStefan Weinhuber /* 5081f3eb5384SStefan Weinhuber * Print sense data from a tcw. 5082f3eb5384SStefan Weinhuber */ 5083f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense_tcw(struct dasd_device *device, 5084f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 5085f3eb5384SStefan Weinhuber { 5086f3eb5384SStefan Weinhuber char *page; 5087f3eb5384SStefan Weinhuber int len, sl, sct, residual; 5088f3eb5384SStefan Weinhuber struct tsb *tsb; 5089ef19298bSStefan Weinhuber u8 *sense, *rcq; 5090f3eb5384SStefan Weinhuber 5091f3eb5384SStefan Weinhuber page = (char *) get_zeroed_page(GFP_ATOMIC); 5092f3eb5384SStefan Weinhuber if (page == NULL) { 5093fc19f381SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, " %s", 5094f3eb5384SStefan Weinhuber "No memory to dump sense data"); 5095f3eb5384SStefan Weinhuber return; 5096f3eb5384SStefan Weinhuber } 5097f3eb5384SStefan Weinhuber /* dump the sense data */ 5098773bab4aSSebastian Ott len = sprintf(page, PRINTK_HEADER 5099f3eb5384SStefan Weinhuber " I/O status report for device %s:\n", 5100f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev)); 5101773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5102a5a0061fSStefan Weinhuber " in req: %p CC:%02X FC:%02X AC:%02X SC:%02X DS:%02X " 5103a5a0061fSStefan Weinhuber "CS:%02X fcxs:%02X schxs:%02X RC:%d\n", 5104a5a0061fSStefan Weinhuber req, scsw_cc(&irb->scsw), scsw_fctl(&irb->scsw), 5105a5a0061fSStefan Weinhuber scsw_actl(&irb->scsw), scsw_stctl(&irb->scsw), 5106a5a0061fSStefan Weinhuber scsw_dstat(&irb->scsw), scsw_cstat(&irb->scsw), 5107a521b048SStefan Haberland irb->scsw.tm.fcxs, 5108a521b048SStefan Haberland (irb->scsw.tm.ifob << 7) | irb->scsw.tm.sesq, 5109a5a0061fSStefan Weinhuber req ? req->intrc : 0); 5110773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5111f3eb5384SStefan Weinhuber " device %s: Failing TCW: %p\n", 5112f3eb5384SStefan Weinhuber dev_name(&device->cdev->dev), 5113f3eb5384SStefan Weinhuber (void *) (addr_t) irb->scsw.tm.tcw); 5114f3eb5384SStefan Weinhuber 5115f3eb5384SStefan Weinhuber tsb = NULL; 5116f3eb5384SStefan Weinhuber sense = NULL; 5117a5a0061fSStefan Weinhuber if (irb->scsw.tm.tcw && (irb->scsw.tm.fcxs & 0x01)) 5118f3eb5384SStefan Weinhuber tsb = tcw_get_tsb( 5119f3eb5384SStefan Weinhuber (struct tcw *)(unsigned long)irb->scsw.tm.tcw); 5120f3eb5384SStefan Weinhuber 5121b8fde722SStefan Haberland if (tsb) { 5122773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5123f3eb5384SStefan Weinhuber " tsb->length %d\n", tsb->length); 5124773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5125f3eb5384SStefan Weinhuber " tsb->flags %x\n", tsb->flags); 5126773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5127f3eb5384SStefan Weinhuber " tsb->dcw_offset %d\n", tsb->dcw_offset); 5128773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5129f3eb5384SStefan Weinhuber " tsb->count %d\n", tsb->count); 5130f3eb5384SStefan Weinhuber residual = tsb->count - 28; 5131773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5132f3eb5384SStefan Weinhuber " residual %d\n", residual); 5133f3eb5384SStefan Weinhuber 5134f3eb5384SStefan Weinhuber switch (tsb->flags & 0x07) { 5135f3eb5384SStefan Weinhuber case 1: /* tsa_iostat */ 5136773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5137f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_time %d\n", 5138f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_time); 5139773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5140f3eb5384SStefan Weinhuber " tsb->tsa.iostat.def_time %d\n", 5141f3eb5384SStefan Weinhuber tsb->tsa.iostat.def_time); 5142773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5143f3eb5384SStefan Weinhuber " tsb->tsa.iostat.queue_time %d\n", 5144f3eb5384SStefan Weinhuber tsb->tsa.iostat.queue_time); 5145773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5146f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_busy_time %d\n", 5147f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_busy_time); 5148773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5149f3eb5384SStefan Weinhuber " tsb->tsa.iostat.dev_act_time %d\n", 5150f3eb5384SStefan Weinhuber tsb->tsa.iostat.dev_act_time); 5151f3eb5384SStefan Weinhuber sense = tsb->tsa.iostat.sense; 5152f3eb5384SStefan Weinhuber break; 5153f3eb5384SStefan Weinhuber case 2: /* ts_ddpc */ 5154773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5155f3eb5384SStefan Weinhuber " tsb->tsa.ddpc.rc %d\n", tsb->tsa.ddpc.rc); 5156ef19298bSStefan Weinhuber for (sl = 0; sl < 2; sl++) { 5157773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5158ef19298bSStefan Weinhuber " tsb->tsa.ddpc.rcq %2d-%2d: ", 5159ef19298bSStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 5160ef19298bSStefan Weinhuber rcq = tsb->tsa.ddpc.rcq; 5161f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 5162f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 5163ef19298bSStefan Weinhuber rcq[8 * sl + sct]); 5164f3eb5384SStefan Weinhuber } 5165f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 5166f3eb5384SStefan Weinhuber } 5167f3eb5384SStefan Weinhuber sense = tsb->tsa.ddpc.sense; 5168f3eb5384SStefan Weinhuber break; 5169f3eb5384SStefan Weinhuber case 3: /* tsa_intrg */ 5170773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 51718693b914SColin Ian King " tsb->tsa.intrg.: not supported yet\n"); 5172f3eb5384SStefan Weinhuber break; 5173f3eb5384SStefan Weinhuber } 5174f3eb5384SStefan Weinhuber 5175f3eb5384SStefan Weinhuber if (sense) { 5176f3eb5384SStefan Weinhuber for (sl = 0; sl < 4; sl++) { 5177773bab4aSSebastian Ott len += sprintf(page + len, PRINTK_HEADER 5178f3eb5384SStefan Weinhuber " Sense(hex) %2d-%2d:", 5179f3eb5384SStefan Weinhuber (8 * sl), ((8 * sl) + 7)); 5180f3eb5384SStefan Weinhuber for (sct = 0; sct < 8; sct++) { 5181f3eb5384SStefan Weinhuber len += sprintf(page + len, " %02x", 5182f3eb5384SStefan Weinhuber sense[8 * sl + sct]); 5183f3eb5384SStefan Weinhuber } 5184f3eb5384SStefan Weinhuber len += sprintf(page + len, "\n"); 5185f3eb5384SStefan Weinhuber } 5186f3eb5384SStefan Weinhuber 5187f3eb5384SStefan Weinhuber if (sense[27] & DASD_SENSE_BIT_0) { 5188f3eb5384SStefan Weinhuber /* 24 Byte Sense Data */ 5189773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 5190f3eb5384SStefan Weinhuber " 24 Byte: %x MSG %x, " 5191f3eb5384SStefan Weinhuber "%s MSGb to SYSOP\n", 5192f3eb5384SStefan Weinhuber sense[7] >> 4, sense[7] & 0x0f, 5193f3eb5384SStefan Weinhuber sense[1] & 0x10 ? "" : "no"); 5194f3eb5384SStefan Weinhuber } else { 5195f3eb5384SStefan Weinhuber /* 32 Byte Sense Data */ 5196773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 5197f3eb5384SStefan Weinhuber " 32 Byte: Format: %x " 5198f3eb5384SStefan Weinhuber "Exception class %x\n", 5199f3eb5384SStefan Weinhuber sense[6] & 0x0f, sense[22] >> 4); 5200f3eb5384SStefan Weinhuber } 5201f3eb5384SStefan Weinhuber } else { 5202773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 5203f3eb5384SStefan Weinhuber " SORRY - NO VALID SENSE AVAILABLE\n"); 5204f3eb5384SStefan Weinhuber } 5205f3eb5384SStefan Weinhuber } else { 5206773bab4aSSebastian Ott sprintf(page + len, PRINTK_HEADER 5207f3eb5384SStefan Weinhuber " SORRY - NO TSB DATA AVAILABLE\n"); 5208f3eb5384SStefan Weinhuber } 5209773bab4aSSebastian Ott printk(KERN_ERR "%s", page); 5210f3eb5384SStefan Weinhuber free_page((unsigned long) page); 5211f3eb5384SStefan Weinhuber } 5212f3eb5384SStefan Weinhuber 5213f3eb5384SStefan Weinhuber static void dasd_eckd_dump_sense(struct dasd_device *device, 5214f3eb5384SStefan Weinhuber struct dasd_ccw_req *req, struct irb *irb) 5215f3eb5384SStefan Weinhuber { 52168fd57520SJan Höppner u8 *sense = dasd_get_sense(irb); 52178fd57520SJan Höppner 52188fd57520SJan Höppner if (scsw_is_tm(&irb->scsw)) { 52198fd57520SJan Höppner /* 52208fd57520SJan Höppner * In some cases the 'File Protected' or 'Incorrect Length' 52218fd57520SJan Höppner * error might be expected and log messages shouldn't be written 52228fd57520SJan Höppner * then. Check if the according suppress bit is set. 52238fd57520SJan Höppner */ 52248fd57520SJan Höppner if (sense && (sense[1] & SNS1_FILE_PROTECTED) && 52258fd57520SJan Höppner test_bit(DASD_CQR_SUPPRESS_FP, &req->flags)) 52268fd57520SJan Höppner return; 52278fd57520SJan Höppner if (scsw_cstat(&irb->scsw) == 0x40 && 52288fd57520SJan Höppner test_bit(DASD_CQR_SUPPRESS_IL, &req->flags)) 52298fd57520SJan Höppner return; 52308fd57520SJan Höppner 5231f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_tcw(device, req, irb); 52328fd57520SJan Höppner } else { 52338fd57520SJan Höppner /* 5234ab24fbd3SStefan Haberland * In some cases the 'Command Reject' or 'No Record Found' 5235ab24fbd3SStefan Haberland * error might be expected and log messages shouldn't be 5236ab24fbd3SStefan Haberland * written then. Check if the according suppress bit is set. 52378fd57520SJan Höppner */ 5238ab24fbd3SStefan Haberland if (sense && sense[0] & SNS0_CMD_REJECT && 5239ab24fbd3SStefan Haberland test_bit(DASD_CQR_SUPPRESS_CR, &req->flags)) 5240ab24fbd3SStefan Haberland return; 5241ab24fbd3SStefan Haberland 52428fd57520SJan Höppner if (sense && sense[1] & SNS1_NO_REC_FOUND && 52438fd57520SJan Höppner test_bit(DASD_CQR_SUPPRESS_NRF, &req->flags)) 52448fd57520SJan Höppner return; 52458fd57520SJan Höppner 5246f3eb5384SStefan Weinhuber dasd_eckd_dump_sense_ccw(device, req, irb); 5247f3eb5384SStefan Weinhuber } 52488fd57520SJan Höppner } 5249f3eb5384SStefan Weinhuber 5250501183f2SStefan Haberland static int dasd_eckd_pm_freeze(struct dasd_device *device) 5251d41dd122SStefan Haberland { 5252d41dd122SStefan Haberland /* 5253d41dd122SStefan Haberland * the device should be disconnected from our LCU structure 5254d41dd122SStefan Haberland * on restore we will reconnect it and reread LCU specific 5255d41dd122SStefan Haberland * information like PAV support that might have changed 5256d41dd122SStefan Haberland */ 5257d41dd122SStefan Haberland dasd_alias_remove_device(device); 5258d41dd122SStefan Haberland dasd_alias_disconnect_device_from_lcu(device); 5259d41dd122SStefan Haberland 5260d41dd122SStefan Haberland return 0; 5261d41dd122SStefan Haberland } 5262d41dd122SStefan Haberland 5263501183f2SStefan Haberland static int dasd_eckd_restore_device(struct dasd_device *device) 5264d41dd122SStefan Haberland { 5265543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 52666fca97a9SStefan Haberland struct dasd_eckd_characteristics temp_rdc_data; 5267f9f8d02fSStefan Haberland int rc; 5268d41dd122SStefan Haberland struct dasd_uid temp_uid; 5269a7602f6cSStefan Haberland unsigned long flags; 5270ea4da6eaSStefan Haberland unsigned long cqr_flags = 0; 5271d41dd122SStefan Haberland 5272d41dd122SStefan Haberland /* Read Configuration Data */ 5273251afd69SStefan Haberland rc = dasd_eckd_read_conf(device); 5274251afd69SStefan Haberland if (rc) { 5275251afd69SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 5276251afd69SStefan Haberland "Read configuration data failed, rc=%d", rc); 5277251afd69SStefan Haberland goto out_err; 5278251afd69SStefan Haberland } 5279d41dd122SStefan Haberland 52802dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &temp_uid); 52812dedf0d9SStefan Haberland /* Generate device unique id */ 52822dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 52832dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 5284d41dd122SStefan Haberland if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0) 5285a7602f6cSStefan Haberland dev_err(&device->cdev->dev, "The UID of the DASD has " 5286a7602f6cSStefan Haberland "changed\n"); 52872dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 5288d41dd122SStefan Haberland if (rc) 5289d41dd122SStefan Haberland goto out_err; 5290d41dd122SStefan Haberland 5291d41dd122SStefan Haberland /* register lcu with alias handling, enable PAV if this is a new lcu */ 5292f9f8d02fSStefan Haberland rc = dasd_alias_make_device_known_to_lcu(device); 5293f9f8d02fSStefan Haberland if (rc) 5294251afd69SStefan Haberland goto out_err; 5295ea4da6eaSStefan Haberland 5296ea4da6eaSStefan Haberland set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr_flags); 5297ea4da6eaSStefan Haberland dasd_eckd_validate_server(device, cqr_flags); 5298f4ac1d02SStefan Weinhuber 5299f4ac1d02SStefan Weinhuber /* RE-Read Configuration Data */ 5300251afd69SStefan Haberland rc = dasd_eckd_read_conf(device); 5301251afd69SStefan Haberland if (rc) { 5302251afd69SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 5303251afd69SStefan Haberland "Read configuration data failed, rc=%d", rc); 5304251afd69SStefan Haberland goto out_err2; 5305251afd69SStefan Haberland } 5306d41dd122SStefan Haberland 5307d41dd122SStefan Haberland /* Read Feature Codes */ 530868d1e5f0SStefan Weinhuber dasd_eckd_read_features(device); 5309d41dd122SStefan Haberland 5310c729696bSJan Höppner /* Read Volume Information */ 5311c729696bSJan Höppner rc = dasd_eckd_read_vol_info(device); 5312c729696bSJan Höppner if (rc) 5313c729696bSJan Höppner goto out_err2; 5314c729696bSJan Höppner 5315c729696bSJan Höppner /* Read Extent Pool Information */ 5316c729696bSJan Höppner rc = dasd_eckd_read_ext_pool_info(device); 5317c729696bSJan Höppner if (rc) 5318c729696bSJan Höppner goto out_err2; 5319c729696bSJan Höppner 5320d41dd122SStefan Haberland /* Read Device Characteristics */ 532168b781feSStefan Haberland rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC, 53226fca97a9SStefan Haberland &temp_rdc_data, 64); 5323d41dd122SStefan Haberland if (rc) { 5324b8ed5dd5SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 5325b8ed5dd5SStefan Haberland "Read device characteristic failed, rc=%d", rc); 5326251afd69SStefan Haberland goto out_err2; 5327d41dd122SStefan Haberland } 5328a7602f6cSStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 53296fca97a9SStefan Haberland memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data)); 5330a7602f6cSStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 5331d41dd122SStefan Haberland 5332d41dd122SStefan Haberland /* add device to alias management */ 5333d41dd122SStefan Haberland dasd_alias_add_device(device); 5334d41dd122SStefan Haberland 5335d41dd122SStefan Haberland return 0; 5336d41dd122SStefan Haberland 5337251afd69SStefan Haberland out_err2: 5338251afd69SStefan Haberland dasd_alias_disconnect_device_from_lcu(device); 5339d41dd122SStefan Haberland out_err: 5340e6125fbaSStefan Haberland return -1; 5341d41dd122SStefan Haberland } 5342d41dd122SStefan Haberland 5343501183f2SStefan Haberland static int dasd_eckd_reload_device(struct dasd_device *device) 5344501183f2SStefan Haberland { 5345543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 5346501183f2SStefan Haberland int rc, old_base; 53472dedf0d9SStefan Haberland char print_uid[60]; 53482dedf0d9SStefan Haberland struct dasd_uid uid; 53492dedf0d9SStefan Haberland unsigned long flags; 5350501183f2SStefan Haberland 535159a9ed5fSStefan Haberland /* 535259a9ed5fSStefan Haberland * remove device from alias handling to prevent new requests 535359a9ed5fSStefan Haberland * from being scheduled on the wrong alias device 535459a9ed5fSStefan Haberland */ 535559a9ed5fSStefan Haberland dasd_alias_remove_device(device); 535659a9ed5fSStefan Haberland 53572dedf0d9SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags); 5358501183f2SStefan Haberland old_base = private->uid.base_unit_addr; 53592dedf0d9SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags); 53602dedf0d9SStefan Haberland 5361501183f2SStefan Haberland /* Read Configuration Data */ 5362501183f2SStefan Haberland rc = dasd_eckd_read_conf(device); 5363501183f2SStefan Haberland if (rc) 5364501183f2SStefan Haberland goto out_err; 5365501183f2SStefan Haberland 53662dedf0d9SStefan Haberland rc = dasd_eckd_generate_uid(device); 5367501183f2SStefan Haberland if (rc) 5368501183f2SStefan Haberland goto out_err; 5369501183f2SStefan Haberland /* 5370501183f2SStefan Haberland * update unit address configuration and 5371501183f2SStefan Haberland * add device to alias management 5372501183f2SStefan Haberland */ 5373501183f2SStefan Haberland dasd_alias_update_add_device(device); 5374501183f2SStefan Haberland 53752dedf0d9SStefan Haberland dasd_eckd_get_uid(device, &uid); 53762dedf0d9SStefan Haberland 53772dedf0d9SStefan Haberland if (old_base != uid.base_unit_addr) { 53782dedf0d9SStefan Haberland if (strlen(uid.vduit) > 0) 53792dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 53802dedf0d9SStefan Haberland "%s.%s.%04x.%02x.%s", uid.vendor, uid.serial, 53812dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr, uid.vduit); 5382501183f2SStefan Haberland else 53832dedf0d9SStefan Haberland snprintf(print_uid, sizeof(print_uid), 53842dedf0d9SStefan Haberland "%s.%s.%04x.%02x", uid.vendor, uid.serial, 53852dedf0d9SStefan Haberland uid.ssid, uid.base_unit_addr); 5386501183f2SStefan Haberland 5387501183f2SStefan Haberland dev_info(&device->cdev->dev, 5388501183f2SStefan Haberland "An Alias device was reassigned to a new base device " 53892dedf0d9SStefan Haberland "with UID: %s\n", print_uid); 5390501183f2SStefan Haberland } 5391501183f2SStefan Haberland return 0; 5392501183f2SStefan Haberland 5393501183f2SStefan Haberland out_err: 5394501183f2SStefan Haberland return -1; 5395501183f2SStefan Haberland } 5396501183f2SStefan Haberland 53975db8440cSStefan Haberland static int dasd_eckd_read_message_buffer(struct dasd_device *device, 53985db8440cSStefan Haberland struct dasd_rssd_messages *messages, 53995db8440cSStefan Haberland __u8 lpum) 54005db8440cSStefan Haberland { 54015db8440cSStefan Haberland struct dasd_rssd_messages *message_buf; 54025db8440cSStefan Haberland struct dasd_psf_prssd_data *prssdp; 54035db8440cSStefan Haberland struct dasd_ccw_req *cqr; 54045db8440cSStefan Haberland struct ccw1 *ccw; 54055db8440cSStefan Haberland int rc; 54065db8440cSStefan Haberland 54075db8440cSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 54085db8440cSStefan Haberland (sizeof(struct dasd_psf_prssd_data) + 54095db8440cSStefan Haberland sizeof(struct dasd_rssd_messages)), 5410c5205f2fSSebastian Ott device, NULL); 54115db8440cSStefan Haberland if (IS_ERR(cqr)) { 54125db8440cSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 54135db8440cSStefan Haberland "Could not allocate read message buffer request"); 54145db8440cSStefan Haberland return PTR_ERR(cqr); 54155db8440cSStefan Haberland } 54165db8440cSStefan Haberland 5417af775210SStefan Haberland cqr->lpm = lpum; 5418af775210SStefan Haberland retry: 54195db8440cSStefan Haberland cqr->startdev = device; 54205db8440cSStefan Haberland cqr->memdev = device; 54215db8440cSStefan Haberland cqr->block = NULL; 54225db8440cSStefan Haberland cqr->expires = 10 * HZ; 54235db8440cSStefan Haberland set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 5424b179b037SStefan Haberland /* dasd_sleep_on_immediatly does not do complex error 5425b179b037SStefan Haberland * recovery so clear erp flag and set retry counter to 5426b179b037SStefan Haberland * do basic erp */ 5427b179b037SStefan Haberland clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags); 5428b179b037SStefan Haberland cqr->retries = 256; 54295db8440cSStefan Haberland 54305db8440cSStefan Haberland /* Prepare for Read Subsystem Data */ 54315db8440cSStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 54325db8440cSStefan Haberland memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 54335db8440cSStefan Haberland prssdp->order = PSF_ORDER_PRSSD; 54345db8440cSStefan Haberland prssdp->suborder = 0x03; /* Message Buffer */ 54355db8440cSStefan Haberland /* all other bytes of prssdp must be zero */ 54365db8440cSStefan Haberland 54375db8440cSStefan Haberland ccw = cqr->cpaddr; 54385db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 54395db8440cSStefan Haberland ccw->count = sizeof(struct dasd_psf_prssd_data); 54405db8440cSStefan Haberland ccw->flags |= CCW_FLAG_CC; 54415db8440cSStefan Haberland ccw->flags |= CCW_FLAG_SLI; 54425db8440cSStefan Haberland ccw->cda = (__u32)(addr_t) prssdp; 54435db8440cSStefan Haberland 54445db8440cSStefan Haberland /* Read Subsystem Data - message buffer */ 54455db8440cSStefan Haberland message_buf = (struct dasd_rssd_messages *) (prssdp + 1); 54465db8440cSStefan Haberland memset(message_buf, 0, sizeof(struct dasd_rssd_messages)); 54475db8440cSStefan Haberland 54485db8440cSStefan Haberland ccw++; 54495db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_RSSD; 54505db8440cSStefan Haberland ccw->count = sizeof(struct dasd_rssd_messages); 54515db8440cSStefan Haberland ccw->flags |= CCW_FLAG_SLI; 54525db8440cSStefan Haberland ccw->cda = (__u32)(addr_t) message_buf; 54535db8440cSStefan Haberland 54545db8440cSStefan Haberland cqr->buildclk = get_tod_clock(); 54555db8440cSStefan Haberland cqr->status = DASD_CQR_FILLED; 54565db8440cSStefan Haberland rc = dasd_sleep_on_immediatly(cqr); 54575db8440cSStefan Haberland if (rc == 0) { 54585db8440cSStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 54595db8440cSStefan Haberland message_buf = (struct dasd_rssd_messages *) 54605db8440cSStefan Haberland (prssdp + 1); 54615db8440cSStefan Haberland memcpy(messages, message_buf, 54625db8440cSStefan Haberland sizeof(struct dasd_rssd_messages)); 5463af775210SStefan Haberland } else if (cqr->lpm) { 5464af775210SStefan Haberland /* 5465af775210SStefan Haberland * on z/VM we might not be able to do I/O on the requested path 5466af775210SStefan Haberland * but instead we get the required information on any path 5467af775210SStefan Haberland * so retry with open path mask 5468af775210SStefan Haberland */ 5469af775210SStefan Haberland cqr->lpm = 0; 5470af775210SStefan Haberland goto retry; 54715db8440cSStefan Haberland } else 54725db8440cSStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 54735db8440cSStefan Haberland "Reading messages failed with rc=%d\n" 54745db8440cSStefan Haberland , rc); 54755db8440cSStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 54765db8440cSStefan Haberland return rc; 54775db8440cSStefan Haberland } 54785db8440cSStefan Haberland 54795a3b7b11SStefan Haberland static int dasd_eckd_query_host_access(struct dasd_device *device, 54805a3b7b11SStefan Haberland struct dasd_psf_query_host_access *data) 54815a3b7b11SStefan Haberland { 54825a3b7b11SStefan Haberland struct dasd_eckd_private *private = device->private; 54835a3b7b11SStefan Haberland struct dasd_psf_query_host_access *host_access; 54845a3b7b11SStefan Haberland struct dasd_psf_prssd_data *prssdp; 54855a3b7b11SStefan Haberland struct dasd_ccw_req *cqr; 54865a3b7b11SStefan Haberland struct ccw1 *ccw; 54875a3b7b11SStefan Haberland int rc; 54885a3b7b11SStefan Haberland 54895a3b7b11SStefan Haberland /* not available for HYPER PAV alias devices */ 54905a3b7b11SStefan Haberland if (!device->block && private->lcu->pav == HYPER_PAV) 54915a3b7b11SStefan Haberland return -EOPNOTSUPP; 54925a3b7b11SStefan Haberland 5493ccd53fa2SStefan Haberland /* may not be supported by the storage server */ 5494ccd53fa2SStefan Haberland if (!(private->features.feature[14] & 0x80)) 5495ccd53fa2SStefan Haberland return -EOPNOTSUPP; 5496ccd53fa2SStefan Haberland 54975a3b7b11SStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */, 54985a3b7b11SStefan Haberland sizeof(struct dasd_psf_prssd_data) + 1, 5499c5205f2fSSebastian Ott device, NULL); 55005a3b7b11SStefan Haberland if (IS_ERR(cqr)) { 55015a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 55025a3b7b11SStefan Haberland "Could not allocate read message buffer request"); 55035a3b7b11SStefan Haberland return PTR_ERR(cqr); 55045a3b7b11SStefan Haberland } 55055a3b7b11SStefan Haberland host_access = kzalloc(sizeof(*host_access), GFP_KERNEL | GFP_DMA); 55065a3b7b11SStefan Haberland if (!host_access) { 55075a3b7b11SStefan Haberland dasd_sfree_request(cqr, device); 55085a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 55095a3b7b11SStefan Haberland "Could not allocate host_access buffer"); 55105a3b7b11SStefan Haberland return -ENOMEM; 55115a3b7b11SStefan Haberland } 55125a3b7b11SStefan Haberland cqr->startdev = device; 55135a3b7b11SStefan Haberland cqr->memdev = device; 55145a3b7b11SStefan Haberland cqr->block = NULL; 55155a3b7b11SStefan Haberland cqr->retries = 256; 55165a3b7b11SStefan Haberland cqr->expires = 10 * HZ; 55175a3b7b11SStefan Haberland 55185a3b7b11SStefan Haberland /* Prepare for Read Subsystem Data */ 55195a3b7b11SStefan Haberland prssdp = (struct dasd_psf_prssd_data *) cqr->data; 55205a3b7b11SStefan Haberland memset(prssdp, 0, sizeof(struct dasd_psf_prssd_data)); 55215a3b7b11SStefan Haberland prssdp->order = PSF_ORDER_PRSSD; 55225a3b7b11SStefan Haberland prssdp->suborder = PSF_SUBORDER_QHA; /* query host access */ 55235a3b7b11SStefan Haberland /* LSS and Volume that will be queried */ 55245a3b7b11SStefan Haberland prssdp->lss = private->ned->ID; 55255a3b7b11SStefan Haberland prssdp->volume = private->ned->unit_addr; 55265a3b7b11SStefan Haberland /* all other bytes of prssdp must be zero */ 55275a3b7b11SStefan Haberland 55285a3b7b11SStefan Haberland ccw = cqr->cpaddr; 55295a3b7b11SStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 55305a3b7b11SStefan Haberland ccw->count = sizeof(struct dasd_psf_prssd_data); 55315a3b7b11SStefan Haberland ccw->flags |= CCW_FLAG_CC; 55325a3b7b11SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 55335a3b7b11SStefan Haberland ccw->cda = (__u32)(addr_t) prssdp; 55345a3b7b11SStefan Haberland 55355a3b7b11SStefan Haberland /* Read Subsystem Data - query host access */ 55365a3b7b11SStefan Haberland ccw++; 55375a3b7b11SStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_RSSD; 55385a3b7b11SStefan Haberland ccw->count = sizeof(struct dasd_psf_query_host_access); 55395a3b7b11SStefan Haberland ccw->flags |= CCW_FLAG_SLI; 55405a3b7b11SStefan Haberland ccw->cda = (__u32)(addr_t) host_access; 55415a3b7b11SStefan Haberland 55425a3b7b11SStefan Haberland cqr->buildclk = get_tod_clock(); 55435a3b7b11SStefan Haberland cqr->status = DASD_CQR_FILLED; 5544ab24fbd3SStefan Haberland /* the command might not be supported, suppress error message */ 5545ab24fbd3SStefan Haberland __set_bit(DASD_CQR_SUPPRESS_CR, &cqr->flags); 5546f50af850SStefan Haberland rc = dasd_sleep_on_interruptible(cqr); 55475a3b7b11SStefan Haberland if (rc == 0) { 55485a3b7b11SStefan Haberland *data = *host_access; 55495a3b7b11SStefan Haberland } else { 55505a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, 55515a3b7b11SStefan Haberland "Reading host access data failed with rc=%d\n", 55525a3b7b11SStefan Haberland rc); 55535a3b7b11SStefan Haberland rc = -EOPNOTSUPP; 55545a3b7b11SStefan Haberland } 55555a3b7b11SStefan Haberland 55565a3b7b11SStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 55575a3b7b11SStefan Haberland kfree(host_access); 55585a3b7b11SStefan Haberland return rc; 55595a3b7b11SStefan Haberland } 55605a3b7b11SStefan Haberland /* 55615a3b7b11SStefan Haberland * return number of grouped devices 55625a3b7b11SStefan Haberland */ 55635a3b7b11SStefan Haberland static int dasd_eckd_host_access_count(struct dasd_device *device) 55645a3b7b11SStefan Haberland { 55655a3b7b11SStefan Haberland struct dasd_psf_query_host_access *access; 55665a3b7b11SStefan Haberland struct dasd_ckd_path_group_entry *entry; 55675a3b7b11SStefan Haberland struct dasd_ckd_host_information *info; 55685a3b7b11SStefan Haberland int count = 0; 55695a3b7b11SStefan Haberland int rc, i; 55705a3b7b11SStefan Haberland 55715a3b7b11SStefan Haberland access = kzalloc(sizeof(*access), GFP_NOIO); 55725a3b7b11SStefan Haberland if (!access) { 55735a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 55745a3b7b11SStefan Haberland "Could not allocate access buffer"); 55755a3b7b11SStefan Haberland return -ENOMEM; 55765a3b7b11SStefan Haberland } 55775a3b7b11SStefan Haberland rc = dasd_eckd_query_host_access(device, access); 55785a3b7b11SStefan Haberland if (rc) { 55795a3b7b11SStefan Haberland kfree(access); 55805a3b7b11SStefan Haberland return rc; 55815a3b7b11SStefan Haberland } 55825a3b7b11SStefan Haberland 55835a3b7b11SStefan Haberland info = (struct dasd_ckd_host_information *) 55845a3b7b11SStefan Haberland access->host_access_information; 55855a3b7b11SStefan Haberland for (i = 0; i < info->entry_count; i++) { 55865a3b7b11SStefan Haberland entry = (struct dasd_ckd_path_group_entry *) 55875a3b7b11SStefan Haberland (info->entry + i * info->entry_size); 55885a3b7b11SStefan Haberland if (entry->status_flags & DASD_ECKD_PG_GROUPED) 55895a3b7b11SStefan Haberland count++; 55905a3b7b11SStefan Haberland } 55915a3b7b11SStefan Haberland 55925a3b7b11SStefan Haberland kfree(access); 55935a3b7b11SStefan Haberland return count; 55945a3b7b11SStefan Haberland } 55955a3b7b11SStefan Haberland 55965a3b7b11SStefan Haberland /* 55975a3b7b11SStefan Haberland * write host access information to a sequential file 55985a3b7b11SStefan Haberland */ 55995a3b7b11SStefan Haberland static int dasd_hosts_print(struct dasd_device *device, struct seq_file *m) 56005a3b7b11SStefan Haberland { 56015a3b7b11SStefan Haberland struct dasd_psf_query_host_access *access; 56025a3b7b11SStefan Haberland struct dasd_ckd_path_group_entry *entry; 56035a3b7b11SStefan Haberland struct dasd_ckd_host_information *info; 56045a3b7b11SStefan Haberland char sysplex[9] = ""; 5605c7848e14SChristophe JAILLET int rc, i; 56065a3b7b11SStefan Haberland 56075a3b7b11SStefan Haberland access = kzalloc(sizeof(*access), GFP_NOIO); 56085a3b7b11SStefan Haberland if (!access) { 56095a3b7b11SStefan Haberland DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", 56105a3b7b11SStefan Haberland "Could not allocate access buffer"); 56115a3b7b11SStefan Haberland return -ENOMEM; 56125a3b7b11SStefan Haberland } 56135a3b7b11SStefan Haberland rc = dasd_eckd_query_host_access(device, access); 56145a3b7b11SStefan Haberland if (rc) { 56155a3b7b11SStefan Haberland kfree(access); 56165a3b7b11SStefan Haberland return rc; 56175a3b7b11SStefan Haberland } 56185a3b7b11SStefan Haberland 56195a3b7b11SStefan Haberland info = (struct dasd_ckd_host_information *) 56205a3b7b11SStefan Haberland access->host_access_information; 56215a3b7b11SStefan Haberland for (i = 0; i < info->entry_count; i++) { 56225a3b7b11SStefan Haberland entry = (struct dasd_ckd_path_group_entry *) 56235a3b7b11SStefan Haberland (info->entry + i * info->entry_size); 56245a3b7b11SStefan Haberland /* PGID */ 5625c7848e14SChristophe JAILLET seq_printf(m, "pgid %*phN\n", 11, entry->pgid); 56265a3b7b11SStefan Haberland /* FLAGS */ 56275a3b7b11SStefan Haberland seq_printf(m, "status_flags %02x\n", entry->status_flags); 56285a3b7b11SStefan Haberland /* SYSPLEX NAME */ 56295a3b7b11SStefan Haberland memcpy(&sysplex, &entry->sysplex_name, sizeof(sysplex) - 1); 56305a3b7b11SStefan Haberland EBCASC(sysplex, sizeof(sysplex)); 56315a3b7b11SStefan Haberland seq_printf(m, "sysplex_name %8s\n", sysplex); 56325a3b7b11SStefan Haberland /* SUPPORTED CYLINDER */ 56335a3b7b11SStefan Haberland seq_printf(m, "supported_cylinder %d\n", entry->cylinder); 56345a3b7b11SStefan Haberland /* TIMESTAMP */ 56355a3b7b11SStefan Haberland seq_printf(m, "timestamp %lu\n", (unsigned long) 56365a3b7b11SStefan Haberland entry->timestamp); 56375a3b7b11SStefan Haberland } 56385a3b7b11SStefan Haberland kfree(access); 56395a3b7b11SStefan Haberland 56405a3b7b11SStefan Haberland return 0; 56415a3b7b11SStefan Haberland } 56425a3b7b11SStefan Haberland 56435db8440cSStefan Haberland /* 56445db8440cSStefan Haberland * Perform Subsystem Function - CUIR response 56455db8440cSStefan Haberland */ 56465db8440cSStefan Haberland static int 56475db8440cSStefan Haberland dasd_eckd_psf_cuir_response(struct dasd_device *device, int response, 5648a521b048SStefan Haberland __u32 message_id, __u8 lpum) 56495db8440cSStefan Haberland { 56505db8440cSStefan Haberland struct dasd_psf_cuir_response *psf_cuir; 5651a521b048SStefan Haberland int pos = pathmask_to_pos(lpum); 56525db8440cSStefan Haberland struct dasd_ccw_req *cqr; 56535db8440cSStefan Haberland struct ccw1 *ccw; 56545db8440cSStefan Haberland int rc; 56555db8440cSStefan Haberland 56565db8440cSStefan Haberland cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ , 56575db8440cSStefan Haberland sizeof(struct dasd_psf_cuir_response), 5658c5205f2fSSebastian Ott device, NULL); 56595db8440cSStefan Haberland 56605db8440cSStefan Haberland if (IS_ERR(cqr)) { 56615db8440cSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 56625db8440cSStefan Haberland "Could not allocate PSF-CUIR request"); 56635db8440cSStefan Haberland return PTR_ERR(cqr); 56645db8440cSStefan Haberland } 56655db8440cSStefan Haberland 56665db8440cSStefan Haberland psf_cuir = (struct dasd_psf_cuir_response *)cqr->data; 56675db8440cSStefan Haberland psf_cuir->order = PSF_ORDER_CUIR_RESPONSE; 56685db8440cSStefan Haberland psf_cuir->cc = response; 5669a521b048SStefan Haberland psf_cuir->chpid = device->path[pos].chpid; 56705db8440cSStefan Haberland psf_cuir->message_id = message_id; 5671a521b048SStefan Haberland psf_cuir->cssid = device->path[pos].cssid; 5672a521b048SStefan Haberland psf_cuir->ssid = device->path[pos].ssid; 56735db8440cSStefan Haberland ccw = cqr->cpaddr; 56745db8440cSStefan Haberland ccw->cmd_code = DASD_ECKD_CCW_PSF; 56755db8440cSStefan Haberland ccw->cda = (__u32)(addr_t)psf_cuir; 5676b179b037SStefan Haberland ccw->flags = CCW_FLAG_SLI; 56775db8440cSStefan Haberland ccw->count = sizeof(struct dasd_psf_cuir_response); 56785db8440cSStefan Haberland 56795db8440cSStefan Haberland cqr->startdev = device; 56805db8440cSStefan Haberland cqr->memdev = device; 56815db8440cSStefan Haberland cqr->block = NULL; 56825db8440cSStefan Haberland cqr->retries = 256; 56835db8440cSStefan Haberland cqr->expires = 10*HZ; 56845db8440cSStefan Haberland cqr->buildclk = get_tod_clock(); 56855db8440cSStefan Haberland cqr->status = DASD_CQR_FILLED; 5686b179b037SStefan Haberland set_bit(DASD_CQR_VERIFY_PATH, &cqr->flags); 56875db8440cSStefan Haberland 56885db8440cSStefan Haberland rc = dasd_sleep_on(cqr); 56895db8440cSStefan Haberland 56905db8440cSStefan Haberland dasd_sfree_request(cqr, cqr->memdev); 56915db8440cSStefan Haberland return rc; 56925db8440cSStefan Haberland } 56935db8440cSStefan Haberland 5694b179b037SStefan Haberland /* 5695b179b037SStefan Haberland * return configuration data that is referenced by record selector 5696b179b037SStefan Haberland * if a record selector is specified or per default return the 5697b179b037SStefan Haberland * conf_data pointer for the path specified by lpum 5698b179b037SStefan Haberland */ 5699b179b037SStefan Haberland static struct dasd_conf_data *dasd_eckd_get_ref_conf(struct dasd_device *device, 5700b179b037SStefan Haberland __u8 lpum, 5701b179b037SStefan Haberland struct dasd_cuir_message *cuir) 57025db8440cSStefan Haberland { 5703b179b037SStefan Haberland struct dasd_conf_data *conf_data; 5704b179b037SStefan Haberland int path, pos; 57055db8440cSStefan Haberland 5706b179b037SStefan Haberland if (cuir->record_selector == 0) 5707b179b037SStefan Haberland goto out; 5708b179b037SStefan Haberland for (path = 0x80, pos = 0; path; path >>= 1, pos++) { 5709c9346151SStefan Haberland conf_data = device->path[pos].conf_data; 5710b179b037SStefan Haberland if (conf_data->gneq.record_selector == 5711b179b037SStefan Haberland cuir->record_selector) 5712b179b037SStefan Haberland return conf_data; 57135db8440cSStefan Haberland } 5714b179b037SStefan Haberland out: 5715c9346151SStefan Haberland return device->path[pathmask_to_pos(lpum)].conf_data; 57165db8440cSStefan Haberland } 57175db8440cSStefan Haberland 57185db8440cSStefan Haberland /* 5719b179b037SStefan Haberland * This function determines the scope of a reconfiguration request by 5720b179b037SStefan Haberland * analysing the path and device selection data provided in the CUIR request. 5721b179b037SStefan Haberland * Returns a path mask containing CUIR affected paths for the give device. 5722b179b037SStefan Haberland * 5723b179b037SStefan Haberland * If the CUIR request does not contain the required information return the 5724b179b037SStefan Haberland * path mask of the path the attention message for the CUIR request was reveived 5725b179b037SStefan Haberland * on. 5726b179b037SStefan Haberland */ 5727b179b037SStefan Haberland static int dasd_eckd_cuir_scope(struct dasd_device *device, __u8 lpum, 5728b179b037SStefan Haberland struct dasd_cuir_message *cuir) 5729b179b037SStefan Haberland { 5730b179b037SStefan Haberland struct dasd_conf_data *ref_conf_data; 5731b179b037SStefan Haberland unsigned long bitmask = 0, mask = 0; 5732b179b037SStefan Haberland struct dasd_conf_data *conf_data; 5733b179b037SStefan Haberland unsigned int pos, path; 5734b179b037SStefan Haberland char *ref_gneq, *gneq; 5735b179b037SStefan Haberland char *ref_ned, *ned; 5736b179b037SStefan Haberland int tbcpm = 0; 5737b179b037SStefan Haberland 5738b179b037SStefan Haberland /* if CUIR request does not specify the scope use the path 5739b179b037SStefan Haberland the attention message was presented on */ 5740b179b037SStefan Haberland if (!cuir->ned_map || 5741b179b037SStefan Haberland !(cuir->neq_map[0] | cuir->neq_map[1] | cuir->neq_map[2])) 5742b179b037SStefan Haberland return lpum; 5743b179b037SStefan Haberland 5744b179b037SStefan Haberland /* get reference conf data */ 5745b179b037SStefan Haberland ref_conf_data = dasd_eckd_get_ref_conf(device, lpum, cuir); 5746b179b037SStefan Haberland /* reference ned is determined by ned_map field */ 5747b179b037SStefan Haberland pos = 8 - ffs(cuir->ned_map); 5748b179b037SStefan Haberland ref_ned = (char *)&ref_conf_data->neds[pos]; 5749b179b037SStefan Haberland ref_gneq = (char *)&ref_conf_data->gneq; 5750b179b037SStefan Haberland /* transfer 24 bit neq_map to mask */ 5751b179b037SStefan Haberland mask = cuir->neq_map[2]; 5752b179b037SStefan Haberland mask |= cuir->neq_map[1] << 8; 5753b179b037SStefan Haberland mask |= cuir->neq_map[0] << 16; 5754b179b037SStefan Haberland 5755c9346151SStefan Haberland for (path = 0; path < 8; path++) { 5756b179b037SStefan Haberland /* initialise data per path */ 5757b179b037SStefan Haberland bitmask = mask; 5758c9346151SStefan Haberland conf_data = device->path[path].conf_data; 5759b179b037SStefan Haberland pos = 8 - ffs(cuir->ned_map); 5760b179b037SStefan Haberland ned = (char *) &conf_data->neds[pos]; 5761b179b037SStefan Haberland /* compare reference ned and per path ned */ 5762b179b037SStefan Haberland if (memcmp(ref_ned, ned, sizeof(*ned)) != 0) 5763b179b037SStefan Haberland continue; 5764b179b037SStefan Haberland gneq = (char *)&conf_data->gneq; 5765b179b037SStefan Haberland /* compare reference gneq and per_path gneq under 5766b179b037SStefan Haberland 24 bit mask where mask bit 0 equals byte 7 of 5767b179b037SStefan Haberland the gneq and mask bit 24 equals byte 31 */ 5768b179b037SStefan Haberland while (bitmask) { 5769b179b037SStefan Haberland pos = ffs(bitmask) - 1; 5770b179b037SStefan Haberland if (memcmp(&ref_gneq[31 - pos], &gneq[31 - pos], 1) 5771b179b037SStefan Haberland != 0) 5772b179b037SStefan Haberland break; 5773b179b037SStefan Haberland clear_bit(pos, &bitmask); 5774b179b037SStefan Haberland } 5775b179b037SStefan Haberland if (bitmask) 5776b179b037SStefan Haberland continue; 5777b179b037SStefan Haberland /* device and path match the reference values 5778b179b037SStefan Haberland add path to CUIR scope */ 5779c9346151SStefan Haberland tbcpm |= 0x80 >> path; 5780b179b037SStefan Haberland } 5781b179b037SStefan Haberland return tbcpm; 5782b179b037SStefan Haberland } 5783b179b037SStefan Haberland 5784b179b037SStefan Haberland static void dasd_eckd_cuir_notify_user(struct dasd_device *device, 5785a521b048SStefan Haberland unsigned long paths, int action) 5786b179b037SStefan Haberland { 5787b179b037SStefan Haberland int pos; 5788b179b037SStefan Haberland 5789b179b037SStefan Haberland while (paths) { 5790b179b037SStefan Haberland /* get position of bit in mask */ 5791a521b048SStefan Haberland pos = 8 - ffs(paths); 5792b179b037SStefan Haberland /* get channel path descriptor from this position */ 5793b179b037SStefan Haberland if (action == CUIR_QUIESCE) 5794a521b048SStefan Haberland pr_warn("Service on the storage server caused path %x.%02x to go offline", 5795a521b048SStefan Haberland device->path[pos].cssid, 5796a521b048SStefan Haberland device->path[pos].chpid); 5797b179b037SStefan Haberland else if (action == CUIR_RESUME) 5798a521b048SStefan Haberland pr_info("Path %x.%02x is back online after service on the storage server", 5799a521b048SStefan Haberland device->path[pos].cssid, 5800a521b048SStefan Haberland device->path[pos].chpid); 5801a521b048SStefan Haberland clear_bit(7 - pos, &paths); 5802b179b037SStefan Haberland } 5803b179b037SStefan Haberland } 5804b179b037SStefan Haberland 5805b179b037SStefan Haberland static int dasd_eckd_cuir_remove_path(struct dasd_device *device, __u8 lpum, 5806b179b037SStefan Haberland struct dasd_cuir_message *cuir) 5807b179b037SStefan Haberland { 5808b179b037SStefan Haberland unsigned long tbcpm; 5809b179b037SStefan Haberland 5810b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(device, lpum, cuir); 5811b179b037SStefan Haberland /* nothing to do if path is not in use */ 5812c9346151SStefan Haberland if (!(dasd_path_get_opm(device) & tbcpm)) 5813b179b037SStefan Haberland return 0; 5814c9346151SStefan Haberland if (!(dasd_path_get_opm(device) & ~tbcpm)) { 5815b179b037SStefan Haberland /* no path would be left if the CUIR action is taken 5816b179b037SStefan Haberland return error */ 5817b179b037SStefan Haberland return -EINVAL; 5818b179b037SStefan Haberland } 5819b179b037SStefan Haberland /* remove device from operational path mask */ 5820c9346151SStefan Haberland dasd_path_remove_opm(device, tbcpm); 5821c9346151SStefan Haberland dasd_path_add_cuirpm(device, tbcpm); 5822b179b037SStefan Haberland return tbcpm; 5823b179b037SStefan Haberland } 5824b179b037SStefan Haberland 5825b179b037SStefan Haberland /* 5826b179b037SStefan Haberland * walk through all devices and build a path mask to quiesce them 5827b179b037SStefan Haberland * return an error if the last path to a device would be removed 58285db8440cSStefan Haberland * 58295db8440cSStefan Haberland * if only part of the devices are quiesced and an error 58305db8440cSStefan Haberland * occurs no onlining necessary, the storage server will 58315db8440cSStefan Haberland * notify the already set offline devices again 58325db8440cSStefan Haberland */ 58335db8440cSStefan Haberland static int dasd_eckd_cuir_quiesce(struct dasd_device *device, __u8 lpum, 5834b179b037SStefan Haberland struct dasd_cuir_message *cuir) 58355db8440cSStefan Haberland { 5836543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 58375db8440cSStefan Haberland struct alias_pav_group *pavgroup, *tempgroup; 58385db8440cSStefan Haberland struct dasd_device *dev, *n; 5839b179b037SStefan Haberland unsigned long paths = 0; 5840b179b037SStefan Haberland unsigned long flags; 5841b179b037SStefan Haberland int tbcpm; 58425db8440cSStefan Haberland 58435db8440cSStefan Haberland /* active devices */ 5844b179b037SStefan Haberland list_for_each_entry_safe(dev, n, &private->lcu->active_devices, 58455db8440cSStefan Haberland alias_list) { 5846b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 5847b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 5848b179b037SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); 5849b179b037SStefan Haberland if (tbcpm < 0) 5850b179b037SStefan Haberland goto out_err; 5851b179b037SStefan Haberland paths |= tbcpm; 58525db8440cSStefan Haberland } 58535db8440cSStefan Haberland /* inactive devices */ 5854b179b037SStefan Haberland list_for_each_entry_safe(dev, n, &private->lcu->inactive_devices, 58555db8440cSStefan Haberland alias_list) { 5856b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 5857b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 5858b179b037SStefan Haberland spin_unlock_irqrestore(get_ccwdev_lock(dev->cdev), flags); 5859b179b037SStefan Haberland if (tbcpm < 0) 5860b179b037SStefan Haberland goto out_err; 5861b179b037SStefan Haberland paths |= tbcpm; 58625db8440cSStefan Haberland } 58635db8440cSStefan Haberland /* devices in PAV groups */ 58645db8440cSStefan Haberland list_for_each_entry_safe(pavgroup, tempgroup, 58655db8440cSStefan Haberland &private->lcu->grouplist, group) { 58665db8440cSStefan Haberland list_for_each_entry_safe(dev, n, &pavgroup->baselist, 58675db8440cSStefan Haberland alias_list) { 5868b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 5869b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 5870b179b037SStefan Haberland spin_unlock_irqrestore( 5871b179b037SStefan Haberland get_ccwdev_lock(dev->cdev), flags); 5872b179b037SStefan Haberland if (tbcpm < 0) 5873b179b037SStefan Haberland goto out_err; 5874b179b037SStefan Haberland paths |= tbcpm; 58755db8440cSStefan Haberland } 58765db8440cSStefan Haberland list_for_each_entry_safe(dev, n, &pavgroup->aliaslist, 58775db8440cSStefan Haberland alias_list) { 5878b179b037SStefan Haberland spin_lock_irqsave(get_ccwdev_lock(dev->cdev), flags); 5879b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_remove_path(dev, lpum, cuir); 5880b179b037SStefan Haberland spin_unlock_irqrestore( 5881b179b037SStefan Haberland get_ccwdev_lock(dev->cdev), flags); 5882b179b037SStefan Haberland if (tbcpm < 0) 5883b179b037SStefan Haberland goto out_err; 5884b179b037SStefan Haberland paths |= tbcpm; 58855db8440cSStefan Haberland } 58865db8440cSStefan Haberland } 5887b179b037SStefan Haberland /* notify user about all paths affected by CUIR action */ 5888a521b048SStefan Haberland dasd_eckd_cuir_notify_user(device, paths, CUIR_QUIESCE); 5889b179b037SStefan Haberland return 0; 5890b179b037SStefan Haberland out_err: 5891b179b037SStefan Haberland return tbcpm; 58925db8440cSStefan Haberland } 58935db8440cSStefan Haberland 58945db8440cSStefan Haberland static int dasd_eckd_cuir_resume(struct dasd_device *device, __u8 lpum, 5895b179b037SStefan Haberland struct dasd_cuir_message *cuir) 58965db8440cSStefan Haberland { 5897543691a4SSebastian Ott struct dasd_eckd_private *private = device->private; 58985db8440cSStefan Haberland struct alias_pav_group *pavgroup, *tempgroup; 58995db8440cSStefan Haberland struct dasd_device *dev, *n; 5900b179b037SStefan Haberland unsigned long paths = 0; 5901b179b037SStefan Haberland int tbcpm; 59025db8440cSStefan Haberland 59035db8440cSStefan Haberland /* 59045db8440cSStefan Haberland * the path may have been added through a generic path event before 59055db8440cSStefan Haberland * only trigger path verification if the path is not already in use 59065db8440cSStefan Haberland */ 59075db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 59085db8440cSStefan Haberland &private->lcu->active_devices, 59095db8440cSStefan Haberland alias_list) { 5910b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 5911b179b037SStefan Haberland paths |= tbcpm; 5912c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 5913c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 59145db8440cSStefan Haberland dasd_schedule_device_bh(dev); 59155db8440cSStefan Haberland } 59165db8440cSStefan Haberland } 59175db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 59185db8440cSStefan Haberland &private->lcu->inactive_devices, 59195db8440cSStefan Haberland alias_list) { 5920b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 5921b179b037SStefan Haberland paths |= tbcpm; 5922c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 5923c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 59245db8440cSStefan Haberland dasd_schedule_device_bh(dev); 59255db8440cSStefan Haberland } 59265db8440cSStefan Haberland } 59275db8440cSStefan Haberland /* devices in PAV groups */ 59285db8440cSStefan Haberland list_for_each_entry_safe(pavgroup, tempgroup, 59295db8440cSStefan Haberland &private->lcu->grouplist, 59305db8440cSStefan Haberland group) { 59315db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 59325db8440cSStefan Haberland &pavgroup->baselist, 59335db8440cSStefan Haberland alias_list) { 5934b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 5935b179b037SStefan Haberland paths |= tbcpm; 5936c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 5937c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 59385db8440cSStefan Haberland dasd_schedule_device_bh(dev); 59395db8440cSStefan Haberland } 59405db8440cSStefan Haberland } 59415db8440cSStefan Haberland list_for_each_entry_safe(dev, n, 59425db8440cSStefan Haberland &pavgroup->aliaslist, 59435db8440cSStefan Haberland alias_list) { 5944b179b037SStefan Haberland tbcpm = dasd_eckd_cuir_scope(dev, lpum, cuir); 5945b179b037SStefan Haberland paths |= tbcpm; 5946c9346151SStefan Haberland if (!(dasd_path_get_opm(dev) & tbcpm)) { 5947c9346151SStefan Haberland dasd_path_add_tbvpm(dev, tbcpm); 59485db8440cSStefan Haberland dasd_schedule_device_bh(dev); 59495db8440cSStefan Haberland } 59505db8440cSStefan Haberland } 59515db8440cSStefan Haberland } 5952b179b037SStefan Haberland /* notify user about all paths affected by CUIR action */ 5953a521b048SStefan Haberland dasd_eckd_cuir_notify_user(device, paths, CUIR_RESUME); 5954b179b037SStefan Haberland return 0; 59555db8440cSStefan Haberland } 59565db8440cSStefan Haberland 59575db8440cSStefan Haberland static void dasd_eckd_handle_cuir(struct dasd_device *device, void *messages, 59585db8440cSStefan Haberland __u8 lpum) 59595db8440cSStefan Haberland { 59605db8440cSStefan Haberland struct dasd_cuir_message *cuir = messages; 5961a521b048SStefan Haberland int response; 59625db8440cSStefan Haberland 5963b179b037SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, 5964b179b037SStefan Haberland "CUIR request: %016llx %016llx %016llx %08x", 5965b179b037SStefan Haberland ((u64 *)cuir)[0], ((u64 *)cuir)[1], ((u64 *)cuir)[2], 5966b179b037SStefan Haberland ((u32 *)cuir)[3]); 59675db8440cSStefan Haberland 59685db8440cSStefan Haberland if (cuir->code == CUIR_QUIESCE) { 59695db8440cSStefan Haberland /* quiesce */ 5970a521b048SStefan Haberland if (dasd_eckd_cuir_quiesce(device, lpum, cuir)) 5971b179b037SStefan Haberland response = PSF_CUIR_LAST_PATH; 5972b179b037SStefan Haberland else 5973b179b037SStefan Haberland response = PSF_CUIR_COMPLETED; 59745db8440cSStefan Haberland } else if (cuir->code == CUIR_RESUME) { 59755db8440cSStefan Haberland /* resume */ 5976a521b048SStefan Haberland dasd_eckd_cuir_resume(device, lpum, cuir); 5977b179b037SStefan Haberland response = PSF_CUIR_COMPLETED; 59785db8440cSStefan Haberland } else 59795db8440cSStefan Haberland response = PSF_CUIR_NOT_SUPPORTED; 59805db8440cSStefan Haberland 5981b179b037SStefan Haberland dasd_eckd_psf_cuir_response(device, response, 5982a521b048SStefan Haberland cuir->message_id, lpum); 5983b179b037SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, 5984b179b037SStefan Haberland "CUIR response: %d on message ID %08x", response, 5985b179b037SStefan Haberland cuir->message_id); 5986b179b037SStefan Haberland /* to make sure there is no attention left schedule work again */ 5987b179b037SStefan Haberland device->discipline->check_attention(device, lpum); 59885db8440cSStefan Haberland } 59895db8440cSStefan Haberland 59905db8440cSStefan Haberland static void dasd_eckd_check_attention_work(struct work_struct *work) 59915db8440cSStefan Haberland { 59925db8440cSStefan Haberland struct check_attention_work_data *data; 59935db8440cSStefan Haberland struct dasd_rssd_messages *messages; 59945db8440cSStefan Haberland struct dasd_device *device; 59955db8440cSStefan Haberland int rc; 59965db8440cSStefan Haberland 59975db8440cSStefan Haberland data = container_of(work, struct check_attention_work_data, worker); 59985db8440cSStefan Haberland device = data->device; 59995db8440cSStefan Haberland messages = kzalloc(sizeof(*messages), GFP_KERNEL); 60005db8440cSStefan Haberland if (!messages) { 60015db8440cSStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 60025db8440cSStefan Haberland "Could not allocate attention message buffer"); 60035db8440cSStefan Haberland goto out; 60045db8440cSStefan Haberland } 60055db8440cSStefan Haberland rc = dasd_eckd_read_message_buffer(device, messages, data->lpum); 60065db8440cSStefan Haberland if (rc) 60075db8440cSStefan Haberland goto out; 60085db8440cSStefan Haberland if (messages->length == ATTENTION_LENGTH_CUIR && 60095db8440cSStefan Haberland messages->format == ATTENTION_FORMAT_CUIR) 60105db8440cSStefan Haberland dasd_eckd_handle_cuir(device, messages, data->lpum); 60115db8440cSStefan Haberland out: 60125db8440cSStefan Haberland dasd_put_device(device); 60135db8440cSStefan Haberland kfree(messages); 60145db8440cSStefan Haberland kfree(data); 60155db8440cSStefan Haberland } 60165db8440cSStefan Haberland 60175db8440cSStefan Haberland static int dasd_eckd_check_attention(struct dasd_device *device, __u8 lpum) 60185db8440cSStefan Haberland { 60195db8440cSStefan Haberland struct check_attention_work_data *data; 60205db8440cSStefan Haberland 60215db8440cSStefan Haberland data = kzalloc(sizeof(*data), GFP_ATOMIC); 60225db8440cSStefan Haberland if (!data) 60235db8440cSStefan Haberland return -ENOMEM; 60245db8440cSStefan Haberland INIT_WORK(&data->worker, dasd_eckd_check_attention_work); 60255db8440cSStefan Haberland dasd_get_device(device); 60265db8440cSStefan Haberland data->device = device; 60275db8440cSStefan Haberland data->lpum = lpum; 60285db8440cSStefan Haberland schedule_work(&data->worker); 60295db8440cSStefan Haberland return 0; 60305db8440cSStefan Haberland } 60315db8440cSStefan Haberland 6032a521b048SStefan Haberland static int dasd_eckd_disable_hpf_path(struct dasd_device *device, __u8 lpum) 6033a521b048SStefan Haberland { 6034a521b048SStefan Haberland if (~lpum & dasd_path_get_opm(device)) { 6035a521b048SStefan Haberland dasd_path_add_nohpfpm(device, lpum); 6036a521b048SStefan Haberland dasd_path_remove_opm(device, lpum); 6037a521b048SStefan Haberland dev_err(&device->cdev->dev, 6038a521b048SStefan Haberland "Channel path %02X lost HPF functionality and is disabled\n", 6039a521b048SStefan Haberland lpum); 6040a521b048SStefan Haberland return 1; 6041a521b048SStefan Haberland } 6042a521b048SStefan Haberland return 0; 6043a521b048SStefan Haberland } 6044a521b048SStefan Haberland 6045a521b048SStefan Haberland static void dasd_eckd_disable_hpf_device(struct dasd_device *device) 6046a521b048SStefan Haberland { 6047a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 6048a521b048SStefan Haberland 6049a521b048SStefan Haberland dev_err(&device->cdev->dev, 6050a521b048SStefan Haberland "High Performance FICON disabled\n"); 6051a521b048SStefan Haberland private->fcx_max_data = 0; 6052a521b048SStefan Haberland } 6053a521b048SStefan Haberland 6054a521b048SStefan Haberland static int dasd_eckd_hpf_enabled(struct dasd_device *device) 6055a521b048SStefan Haberland { 6056a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 6057a521b048SStefan Haberland 6058a521b048SStefan Haberland return private->fcx_max_data ? 1 : 0; 6059a521b048SStefan Haberland } 6060a521b048SStefan Haberland 6061a521b048SStefan Haberland static void dasd_eckd_handle_hpf_error(struct dasd_device *device, 6062a521b048SStefan Haberland struct irb *irb) 6063a521b048SStefan Haberland { 6064a521b048SStefan Haberland struct dasd_eckd_private *private = device->private; 6065a521b048SStefan Haberland 6066a521b048SStefan Haberland if (!private->fcx_max_data) { 6067a521b048SStefan Haberland /* sanity check for no HPF, the error makes no sense */ 6068a521b048SStefan Haberland DBF_DEV_EVENT(DBF_WARNING, device, "%s", 6069a521b048SStefan Haberland "Trying to disable HPF for a non HPF device"); 6070a521b048SStefan Haberland return; 6071a521b048SStefan Haberland } 6072a521b048SStefan Haberland if (irb->scsw.tm.sesq == SCSW_SESQ_DEV_NOFCX) { 6073a521b048SStefan Haberland dasd_eckd_disable_hpf_device(device); 6074a521b048SStefan Haberland } else if (irb->scsw.tm.sesq == SCSW_SESQ_PATH_NOFCX) { 6075a521b048SStefan Haberland if (dasd_eckd_disable_hpf_path(device, irb->esw.esw1.lpum)) 6076a521b048SStefan Haberland return; 6077a521b048SStefan Haberland dasd_eckd_disable_hpf_device(device); 6078a521b048SStefan Haberland dasd_path_set_tbvpm(device, 6079a521b048SStefan Haberland dasd_path_get_hpfpm(device)); 6080a521b048SStefan Haberland } 6081a521b048SStefan Haberland /* 6082a521b048SStefan Haberland * prevent that any new I/O ist started on the device and schedule a 6083a521b048SStefan Haberland * requeue of existing requests 6084a521b048SStefan Haberland */ 6085a521b048SStefan Haberland dasd_device_set_stop_bits(device, DASD_STOPPED_NOT_ACC); 6086a521b048SStefan Haberland dasd_schedule_requeue(device); 6087a521b048SStefan Haberland } 6088a521b048SStefan Haberland 6089d41dd122SStefan Haberland static struct ccw_driver dasd_eckd_driver = { 60903bda058bSSebastian Ott .driver = { 6091d41dd122SStefan Haberland .name = "dasd-eckd", 6092d41dd122SStefan Haberland .owner = THIS_MODULE, 60933bda058bSSebastian Ott }, 6094d41dd122SStefan Haberland .ids = dasd_eckd_ids, 6095d41dd122SStefan Haberland .probe = dasd_eckd_probe, 6096d41dd122SStefan Haberland .remove = dasd_generic_remove, 6097d41dd122SStefan Haberland .set_offline = dasd_generic_set_offline, 6098d41dd122SStefan Haberland .set_online = dasd_eckd_set_online, 6099d41dd122SStefan Haberland .notify = dasd_generic_notify, 6100a4d26c6aSStefan Weinhuber .path_event = dasd_generic_path_event, 61014679e893SStefan Haberland .shutdown = dasd_generic_shutdown, 6102d41dd122SStefan Haberland .freeze = dasd_generic_pm_freeze, 6103d41dd122SStefan Haberland .thaw = dasd_generic_restore_device, 6104d41dd122SStefan Haberland .restore = dasd_generic_restore_device, 6105a23ed009SStefan Haberland .uc_handler = dasd_generic_uc_handler, 6106420f42ecSHeiko Carstens .int_class = IRQIO_DAS, 6107d41dd122SStefan Haberland }; 6108f3eb5384SStefan Weinhuber 61091da177e4SLinus Torvalds /* 61101da177e4SLinus Torvalds * max_blocks is dependent on the amount of storage that is available 61111da177e4SLinus Torvalds * in the static io buffer for each device. Currently each device has 61121da177e4SLinus Torvalds * 8192 bytes (=2 pages). For 64 bit one dasd_mchunkt_t structure has 61131da177e4SLinus Torvalds * 24 bytes, the struct dasd_ccw_req has 136 bytes and each block can use 61141da177e4SLinus Torvalds * up to 16 bytes (8 for the ccw and 8 for the idal pointer). In 61151da177e4SLinus Torvalds * addition we have one define extent ccw + 16 bytes of data and one 61161da177e4SLinus Torvalds * locate record ccw + 16 bytes of data. That makes: 61171da177e4SLinus Torvalds * (8192 - 24 - 136 - 8 - 16 - 8 - 16) / 16 = 499 blocks at maximum. 61181da177e4SLinus Torvalds * We want to fit two into the available memory so that we can immediately 61191da177e4SLinus Torvalds * start the next request if one finishes off. That makes 249.5 blocks 61201da177e4SLinus Torvalds * for one request. Give a little safety and the result is 240. 61211da177e4SLinus Torvalds */ 61221da177e4SLinus Torvalds static struct dasd_discipline dasd_eckd_discipline = { 61231da177e4SLinus Torvalds .owner = THIS_MODULE, 61241da177e4SLinus Torvalds .name = "ECKD", 61251da177e4SLinus Torvalds .ebcname = "ECKD", 6126ef19298bSStefan Weinhuber .max_blocks = 190, 61271da177e4SLinus Torvalds .check_device = dasd_eckd_check_characteristics, 61288e09f215SStefan Weinhuber .uncheck_device = dasd_eckd_uncheck_device, 61291da177e4SLinus Torvalds .do_analysis = dasd_eckd_do_analysis, 6130a4d26c6aSStefan Weinhuber .verify_path = dasd_eckd_verify_path, 6131d42e1712SStefan Haberland .basic_to_ready = dasd_eckd_basic_to_ready, 61328e09f215SStefan Weinhuber .online_to_ready = dasd_eckd_online_to_ready, 6133daa991bfSStefan Haberland .basic_to_known = dasd_eckd_basic_to_known, 61341da177e4SLinus Torvalds .fill_geometry = dasd_eckd_fill_geometry, 61351da177e4SLinus Torvalds .start_IO = dasd_start_IO, 61361da177e4SLinus Torvalds .term_IO = dasd_term_IO, 61378e09f215SStefan Weinhuber .handle_terminated_request = dasd_eckd_handle_terminated_request, 61381da177e4SLinus Torvalds .format_device = dasd_eckd_format_device, 61398fd57520SJan Höppner .check_device_format = dasd_eckd_check_device_format, 61401da177e4SLinus Torvalds .erp_action = dasd_eckd_erp_action, 61411da177e4SLinus Torvalds .erp_postaction = dasd_eckd_erp_postaction, 61425a27e60dSStefan Weinhuber .check_for_device_change = dasd_eckd_check_for_device_change, 61438e09f215SStefan Weinhuber .build_cp = dasd_eckd_build_alias_cp, 61448e09f215SStefan Weinhuber .free_cp = dasd_eckd_free_alias_cp, 61451da177e4SLinus Torvalds .dump_sense = dasd_eckd_dump_sense, 6146fc19f381SStefan Haberland .dump_sense_dbf = dasd_eckd_dump_sense_dbf, 61471da177e4SLinus Torvalds .fill_info = dasd_eckd_fill_info, 61481107ccfbSChristoph Hellwig .ioctl = dasd_eckd_ioctl, 6149d41dd122SStefan Haberland .freeze = dasd_eckd_pm_freeze, 6150d41dd122SStefan Haberland .restore = dasd_eckd_restore_device, 6151501183f2SStefan Haberland .reload = dasd_eckd_reload_device, 61522dedf0d9SStefan Haberland .get_uid = dasd_eckd_get_uid, 6153f1633031SStefan Haberland .kick_validate = dasd_eckd_kick_validate_server, 61545db8440cSStefan Haberland .check_attention = dasd_eckd_check_attention, 61555a3b7b11SStefan Haberland .host_access_count = dasd_eckd_host_access_count, 61565a3b7b11SStefan Haberland .hosts_print = dasd_hosts_print, 6157a521b048SStefan Haberland .handle_hpf_error = dasd_eckd_handle_hpf_error, 6158a521b048SStefan Haberland .disable_hpf = dasd_eckd_disable_hpf_device, 6159a521b048SStefan Haberland .hpf_enabled = dasd_eckd_hpf_enabled, 6160a521b048SStefan Haberland .reset_path = dasd_eckd_reset_path, 6161c729696bSJan Höppner .is_ese = dasd_eckd_is_ese, 6162c729696bSJan Höppner .space_allocated = dasd_eckd_space_allocated, 6163c729696bSJan Höppner .space_configured = dasd_eckd_space_configured, 6164c729696bSJan Höppner .logical_capacity = dasd_eckd_logical_capacity, 6165c729696bSJan Höppner .ext_pool_id = dasd_eckd_ext_pool_id, 6166c729696bSJan Höppner .ext_size = dasd_eckd_ext_size, 6167c729696bSJan Höppner .ext_pool_cap_at_warnlevel = dasd_eckd_ext_pool_cap_at_warnlevel, 6168c729696bSJan Höppner .ext_pool_warn_thrshld = dasd_eckd_ext_pool_warn_thrshld, 6169c729696bSJan Höppner .ext_pool_oos = dasd_eckd_ext_pool_oos, 61705e2b17e7SJan Höppner .ese_format = dasd_eckd_ese_format, 61715e2b17e7SJan Höppner .ese_read = dasd_eckd_ese_read, 61721da177e4SLinus Torvalds }; 61731da177e4SLinus Torvalds 61741da177e4SLinus Torvalds static int __init 61751da177e4SLinus Torvalds dasd_eckd_init(void) 61761da177e4SLinus Torvalds { 6177736e6ea0SSebastian Ott int ret; 6178736e6ea0SSebastian Ott 61791da177e4SLinus Torvalds ASCEBC(dasd_eckd_discipline.ebcname, 4); 6180f932bceaSStefan Weinhuber dasd_reserve_req = kmalloc(sizeof(*dasd_reserve_req), 6181f932bceaSStefan Weinhuber GFP_KERNEL | GFP_DMA); 6182f932bceaSStefan Weinhuber if (!dasd_reserve_req) 6183f932bceaSStefan Weinhuber return -ENOMEM; 6184a4d26c6aSStefan Weinhuber path_verification_worker = kmalloc(sizeof(*path_verification_worker), 6185a4d26c6aSStefan Weinhuber GFP_KERNEL | GFP_DMA); 6186a4d26c6aSStefan Weinhuber if (!path_verification_worker) { 6187a4d26c6aSStefan Weinhuber kfree(dasd_reserve_req); 6188a4d26c6aSStefan Weinhuber return -ENOMEM; 6189a4d26c6aSStefan Weinhuber } 6190558b9ef0SStefan Weinhuber rawpadpage = (void *)__get_free_page(GFP_KERNEL); 6191558b9ef0SStefan Weinhuber if (!rawpadpage) { 6192558b9ef0SStefan Weinhuber kfree(path_verification_worker); 6193558b9ef0SStefan Weinhuber kfree(dasd_reserve_req); 6194558b9ef0SStefan Weinhuber return -ENOMEM; 6195558b9ef0SStefan Weinhuber } 6196736e6ea0SSebastian Ott ret = ccw_driver_register(&dasd_eckd_driver); 6197736e6ea0SSebastian Ott if (!ret) 6198736e6ea0SSebastian Ott wait_for_device_probe(); 6199a4d26c6aSStefan Weinhuber else { 6200a4d26c6aSStefan Weinhuber kfree(path_verification_worker); 6201f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 6202558b9ef0SStefan Weinhuber free_page((unsigned long)rawpadpage); 6203a4d26c6aSStefan Weinhuber } 6204736e6ea0SSebastian Ott return ret; 62051da177e4SLinus Torvalds } 62061da177e4SLinus Torvalds 62071da177e4SLinus Torvalds static void __exit 62081da177e4SLinus Torvalds dasd_eckd_cleanup(void) 62091da177e4SLinus Torvalds { 62101da177e4SLinus Torvalds ccw_driver_unregister(&dasd_eckd_driver); 6211a4d26c6aSStefan Weinhuber kfree(path_verification_worker); 6212f932bceaSStefan Weinhuber kfree(dasd_reserve_req); 6213558b9ef0SStefan Weinhuber free_page((unsigned long)rawpadpage); 62141da177e4SLinus Torvalds } 62151da177e4SLinus Torvalds 62161da177e4SLinus Torvalds module_init(dasd_eckd_init); 62171da177e4SLinus Torvalds module_exit(dasd_eckd_cleanup); 6218